Viewing: api-ni.c
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/* This file is part of Lustre, http://www.lustre.org/ */
#define DEBUG_SUBSYSTEM S_LNET
#include <linux/ctype.h>
#include <linux/log2.h>
#include <linux/ktime.h>
#include <linux/moduleparam.h>
#include <linux/uaccess.h>
#include <linux/sched/signal.h>
#include <linux/libcfs/libcfs.h>
#include <linux/lnet/lib-lnet.h>
#include <uapi/linux/lustre/lustre_ver.h>
#include "udsp.h"
#define D_LNI D_CONSOLE
/*
* initialize ln_api_mutex statically, since it needs to be used in
* discovery_set callback. That module parameter callback can be called
* before module init completes. The mutex needs to be ready for use then.
*/
struct lnet the_lnet = {
.ln_api_mutex = __MUTEX_INITIALIZER(the_lnet.ln_api_mutex),
.ln_ni_total = ATOMIC_INIT(0),
.ln_cpt_restricted_count = ATOMIC_INIT(0),
}; /* THE state of the network */
EXPORT_SYMBOL(the_lnet);
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 17, 53, 0)
static char *ip2nets = "";
module_param(ip2nets, charp, 0444);
MODULE_PARM_DESC(ip2nets, "LNET network <- IP table (Deprecated)");
static char *routes = "";
module_param(routes, charp, 0444);
MODULE_PARM_DESC(routes, "routes to non-local networks (Deprecated)");
#endif
static char *networks = "";
module_param(networks, charp, 0444);
MODULE_PARM_DESC(networks, "local networks");
static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
module_param(rnet_htable_size, int, 0444);
MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
static int use_tcp_bonding;
module_param(use_tcp_bonding, int, 0444);
MODULE_PARM_DESC(use_tcp_bonding,
"use_tcp_bonding parameter has been removed");
unsigned int lnet_numa_range = 0;
module_param(lnet_numa_range, uint, 0444);
MODULE_PARM_DESC(lnet_numa_range,
"NUMA range to consider during Multi-Rail selection");
/*
* lnet_health_sensitivity determines by how much we decrement the health
* value on sending error. The value defaults to 100, which means health
* interface health is decremented by 100 points every failure.
*/
unsigned int lnet_health_sensitivity = 100;
static int sensitivity_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_health_sensitivity = {
.set = sensitivity_set,
.get = param_get_int,
};
#define param_check_health_sensitivity(name, p) \
__param_check(name, p, int)
module_param(lnet_health_sensitivity, health_sensitivity, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lnet_health_sensitivity,
"Value to decrement the health value by on error");
/*
* lnet_recovery_interval determines how often we should perform recovery
* on unhealthy interfaces.
*/
unsigned int lnet_recovery_interval = 1;
static int recovery_interval_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_recovery_interval = {
.set = recovery_interval_set,
.get = param_get_int,
};
#define param_check_recovery_interval(name, p) \
__param_check(name, p, int)
module_param(lnet_recovery_interval, recovery_interval, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lnet_recovery_interval,
"DEPRECATED - Interval to recover unhealthy interfaces in seconds");
unsigned int lnet_recovery_limit;
module_param(lnet_recovery_limit, uint, 0644);
MODULE_PARM_DESC(lnet_recovery_limit,
"How long to attempt recovery of unhealthy peer interfaces in seconds. Set to 0 to allow indefinite recovery");
unsigned int lnet_max_recovery_ping_interval = 900;
unsigned int lnet_max_recovery_ping_count = 9;
static int max_recovery_ping_interval_set(const char *val,
const struct kernel_param *kp);
#define param_check_max_recovery_ping_interval(name, p) \
__param_check(name, p, int)
static struct kernel_param_ops param_ops_max_recovery_ping_interval = {
.set = max_recovery_ping_interval_set,
.get = param_get_int,
};
module_param(lnet_max_recovery_ping_interval, max_recovery_ping_interval, 0644);
MODULE_PARM_DESC(lnet_max_recovery_ping_interval,
"The max interval between LNet recovery pings, in seconds");
int lnet_interfaces_max = LNET_INTERFACES_MAX_DEFAULT;
EXPORT_SYMBOL(lnet_interfaces_max);
static int intf_max_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_interfaces_max = {
.set = intf_max_set,
.get = param_get_int,
};
#define param_check_interfaces_max(name, p) \
__param_check(name, p, int)
module_param(lnet_interfaces_max, interfaces_max, 0644);
MODULE_PARM_DESC(lnet_interfaces_max,
"Maximum number of interfaces in a node.");
unsigned lnet_peer_discovery_disabled = 0;
static int discovery_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_discovery_disabled = {
.set = discovery_set,
.get = param_get_int,
};
#define param_check_discovery_disabled(name, p) \
__param_check(name, p, int)
module_param(lnet_peer_discovery_disabled, discovery_disabled, 0644);
MODULE_PARM_DESC(lnet_peer_discovery_disabled,
"Set to 1 to disable peer discovery on this node.");
unsigned int lnet_drop_asym_route;
static int drop_asym_route_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_drop_asym_route = {
.set = drop_asym_route_set,
.get = param_get_int,
};
#define param_check_drop_asym_route(name, p) \
__param_check(name, p, int)
module_param(lnet_drop_asym_route, drop_asym_route, 0644);
MODULE_PARM_DESC(lnet_drop_asym_route,
"Set to 1 to drop asymmetrical route messages.");
#define LNET_TRANSACTION_TIMEOUT_DEFAULT 150
unsigned int lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_DEFAULT;
static int transaction_to_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_transaction_timeout = {
.set = transaction_to_set,
.get = param_get_int,
};
#define param_check_transaction_timeout(name, p) \
__param_check(name, p, int)
module_param(lnet_transaction_timeout, transaction_timeout, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lnet_transaction_timeout,
"Maximum number of seconds to wait for a peer response.");
#define LNET_RETRY_COUNT_DEFAULT 2
unsigned int lnet_retry_count = LNET_RETRY_COUNT_DEFAULT;
static int retry_count_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_retry_count = {
.set = retry_count_set,
.get = param_get_int,
};
#define param_check_retry_count(name, p) \
__param_check(name, p, int)
module_param(lnet_retry_count, retry_count, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lnet_retry_count,
"Maximum number of times to retry transmitting a message");
unsigned int lnet_response_tracking = 3;
static int response_tracking_set(const char *val, const struct kernel_param *kp);
static struct kernel_param_ops param_ops_response_tracking = {
.set = response_tracking_set,
.get = param_get_int,
};
#define param_check_response_tracking(name, p) \
__param_check(name, p, int)
module_param(lnet_response_tracking, response_tracking, 0644);
MODULE_PARM_DESC(lnet_response_tracking,
"(0|1|2|3) LNet Internal Only|GET Reply only|PUT ACK only|Full Tracking (default)");
int lock_prim_nid = 1;
module_param(lock_prim_nid, int, 0444);
MODULE_PARM_DESC(lock_prim_nid,
"Whether nid passed down by Lustre is locked as primary");
#define LNET_LND_TIMEOUT_DEFAULT ((LNET_TRANSACTION_TIMEOUT_DEFAULT - 1) / \
(LNET_RETRY_COUNT_DEFAULT + 1))
unsigned int lnet_lnd_timeout = LNET_LND_TIMEOUT_DEFAULT;
static void lnet_set_lnd_timeout(void)
{
lnet_lnd_timeout = max((lnet_transaction_timeout - 1) /
(lnet_retry_count + 1), 1U);
}
/*
* This sequence number keeps track of how many times DLC was used to
* update the local NIs. It is incremented when a NI is added or
* removed and checked when sending a message to determine if there is
* a need to re-run the selection algorithm. See lnet_select_pathway()
* for more details on its usage.
*/
static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
struct lnet_fail_ping {
struct lnet_processid lfp_id;
int lfp_errno;
char lfp_msg[256];
};
struct lnet_genl_ping_list {
unsigned int lgpl_index;
unsigned int lgpl_list_count;
unsigned int lgpl_failed_count;
signed long lgpl_timeout;
struct lnet_nid lgpl_src_nid;
GENRADIX(struct lnet_fail_ping) lgpl_failed;
GENRADIX(struct lnet_processid) lgpl_list;
};
static int lnet_ping(struct lnet_processid *id, struct lnet_nid *src_nid,
signed long timeout, struct lnet_genl_ping_list *plist,
int n_ids);
static int lnet_discover(struct lnet_processid *id, u32 force,
struct lnet_genl_ping_list *dlists);
static int
sensitivity_set(const char *val, const struct kernel_param *kp)
{
int rc;
unsigned *sensitivity = (unsigned *)kp->arg;
unsigned long value;
rc = kstrtoul(val, 0, &value);
if (rc) {
CERROR("Invalid module parameter value for 'lnet_health_sensitivity'\n");
return rc;
}
/*
* The purpose of locking the api_mutex here is to ensure that
* the correct value ends up stored properly.
*/
mutex_lock(&the_lnet.ln_api_mutex);
if (value > LNET_MAX_HEALTH_VALUE) {
mutex_unlock(&the_lnet.ln_api_mutex);
CERROR("Invalid health value. Maximum: %d value = %lu\n",
LNET_MAX_HEALTH_VALUE, value);
return -EINVAL;
}
if (*sensitivity != 0 && value == 0 && lnet_retry_count != 0) {
lnet_retry_count = 0;
lnet_set_lnd_timeout();
}
*sensitivity = value;
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
static int
recovery_interval_set(const char *val, const struct kernel_param *kp)
{
CWARN("'lnet_recovery_interval' has been deprecated\n");
return 0;
}
static int
max_recovery_ping_interval_set(const char *val, const struct kernel_param *kp)
{
int rc;
unsigned long value;
rc = kstrtoul(val, 0, &value);
if (rc) {
CERROR("Invalid module parameter value for 'lnet_max_recovery_ping_interval'\n");
return rc;
}
if (!value) {
CERROR("Invalid max ping timeout. Must be strictly positive\n");
return -EINVAL;
}
/* The purpose of locking the api_mutex here is to ensure that
* the correct value ends up stored properly.
*/
mutex_lock(&the_lnet.ln_api_mutex);
lnet_max_recovery_ping_interval = value;
lnet_max_recovery_ping_count = 0;
value >>= 1;
while (value) {
lnet_max_recovery_ping_count++;
value >>= 1;
}
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
static int
discovery_set(const char *val, const struct kernel_param *kp)
{
int rc;
unsigned *discovery_off = (unsigned *)kp->arg;
unsigned long value;
struct lnet_ping_buffer *pbuf;
rc = kstrtoul(val, 0, &value);
if (rc) {
CERROR("Invalid module parameter value for 'lnet_peer_discovery_disabled'\n");
return rc;
}
value = (value) ? 1 : 0;
/*
* The purpose of locking the api_mutex here is to ensure that
* the correct value ends up stored properly.
*/
mutex_lock(&the_lnet.ln_api_mutex);
if (value == *discovery_off) {
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
/*
* We still want to set the discovery value even when LNet is not
* running. This is the case when LNet is being loaded and we want
* the module parameters to take effect. Otherwise if we're
* changing the value dynamically, we want to set it after
* updating the peers
*/
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
*discovery_off = value;
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
/* tell peers that discovery setting has changed */
lnet_net_lock(LNET_LOCK_EX);
pbuf = the_lnet.ln_ping_target;
if (value)
pbuf->pb_info.pi_features &= ~LNET_PING_FEAT_DISCOVERY;
else
pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
lnet_net_unlock(LNET_LOCK_EX);
/* only send a push when we're turning off discovery */
if (*discovery_off <= 0 && value > 0)
lnet_push_update_to_peers(1);
*discovery_off = value;
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
static int
drop_asym_route_set(const char *val, const struct kernel_param *kp)
{
int rc;
unsigned int *drop_asym_route = (unsigned int *)kp->arg;
unsigned long value;
rc = kstrtoul(val, 0, &value);
if (rc) {
CERROR("Invalid module parameter value for "
"'lnet_drop_asym_route'\n");
return rc;
}
/*
* The purpose of locking the api_mutex here is to ensure that
* the correct value ends up stored properly.
*/
mutex_lock(&the_lnet.ln_api_mutex);
if (value == *drop_asym_route) {
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
*drop_asym_route = value;
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
static int
transaction_to_set(const char *val, const struct kernel_param *kp)
{
int rc;
unsigned *transaction_to = (unsigned *)kp->arg;
unsigned long value;
rc = kstrtoul(val, 0, &value);
if (rc) {
CERROR("Invalid module parameter value for 'lnet_transaction_timeout'\n");
return rc;
}
/*
* The purpose of locking the api_mutex here is to ensure that
* the correct value ends up stored properly.
*/
mutex_lock(&the_lnet.ln_api_mutex);
if (value <= lnet_retry_count || value == 0) {
mutex_unlock(&the_lnet.ln_api_mutex);
CERROR("Invalid value for lnet_transaction_timeout (%lu). "
"Has to be greater than lnet_retry_count (%u)\n",
value, lnet_retry_count);
return -EINVAL;
}
if (value == *transaction_to) {
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
*transaction_to = value;
/* Update the lnet_lnd_timeout now that we've modified the
* transaction timeout
*/
lnet_set_lnd_timeout();
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
static int
retry_count_set(const char *val, const struct kernel_param *kp)
{
int rc;
unsigned *retry_count = (unsigned *)kp->arg;
unsigned long value;
rc = kstrtoul(val, 0, &value);
if (rc) {
CERROR("Invalid module parameter value for 'lnet_retry_count'\n");
return rc;
}
/*
* The purpose of locking the api_mutex here is to ensure that
* the correct value ends up stored properly.
*/
mutex_lock(&the_lnet.ln_api_mutex);
if (lnet_health_sensitivity == 0 && value > 0) {
mutex_unlock(&the_lnet.ln_api_mutex);
CERROR("Can not set lnet_retry_count when health feature is turned off\n");
return -EINVAL;
}
if (value > lnet_transaction_timeout) {
mutex_unlock(&the_lnet.ln_api_mutex);
CERROR("Invalid value for lnet_retry_count (%lu). "
"Has to be smaller than lnet_transaction_timeout (%u)\n",
value, lnet_transaction_timeout);
return -EINVAL;
}
*retry_count = value;
/* Update the lnet_lnd_timeout now that we've modified the
* retry count
*/
lnet_set_lnd_timeout();
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
static int
intf_max_set(const char *val, const struct kernel_param *kp)
{
int value, rc;
rc = kstrtoint(val, 0, &value);
if (rc) {
CERROR("Invalid module parameter value for 'lnet_interfaces_max'\n");
return rc;
}
if (value < LNET_INTERFACES_MIN) {
CWARN("max interfaces provided are too small, setting to %d\n",
LNET_INTERFACES_MAX_DEFAULT);
value = LNET_INTERFACES_MAX_DEFAULT;
}
*(int *)kp->arg = value;
return 0;
}
static int
response_tracking_set(const char *val, const struct kernel_param *kp)
{
int rc;
unsigned long new_value;
rc = kstrtoul(val, 0, &new_value);
if (rc) {
CERROR("Invalid value for 'lnet_response_tracking'\n");
return -EINVAL;
}
if (new_value < 0 || new_value > 3) {
CWARN("Invalid value (%lu) for 'lnet_response_tracking'\n",
new_value);
return -EINVAL;
}
lnet_response_tracking = new_value;
return 0;
}
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 17, 53, 0)
static const char *
lnet_get_routes(void)
{
return routes;
}
#endif
static const char *
lnet_get_networks(void)
{
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 17, 53, 0)
const char *nets;
int rc;
if (*networks != 0 && *ip2nets != 0) {
LCONSOLE_ERROR("Please specify EITHER 'networks' or 'ip2nets' but not both at once\n");
return NULL;
}
if (*ip2nets != 0) {
rc = lnet_parse_ip2nets(&nets, ip2nets);
return (rc == 0) ? nets : NULL;
}
#endif
if (*networks != 0)
return networks;
return "tcp";
}
static void
lnet_init_locks(void)
{
spin_lock_init(&the_lnet.ln_eq_wait_lock);
spin_lock_init(&the_lnet.ln_msg_resend_lock);
init_completion(&the_lnet.ln_mt_wait_complete);
mutex_init(&the_lnet.ln_lnd_mutex);
}
struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
* MDs kmem_cache */
struct kmem_cache *lnet_udsp_cachep; /* udsp cache */
struct kmem_cache *lnet_rspt_cachep; /* response tracker cache */
struct kmem_cache *lnet_msg_cachep;
static int
lnet_slab_setup(void)
{
/* create specific kmem_cache for MEs and small MDs (i.e., originally
* allocated in <size-xxx> kmem_cache).
*/
lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(struct lnet_me),
0, 0, NULL);
if (!lnet_mes_cachep)
return -ENOMEM;
lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
LNET_SMALL_MD_SIZE, 0, 0,
NULL);
if (!lnet_small_mds_cachep)
return -ENOMEM;
lnet_udsp_cachep = kmem_cache_create("lnet_udsp",
sizeof(struct lnet_udsp),
0, 0, NULL);
if (!lnet_udsp_cachep)
return -ENOMEM;
lnet_rspt_cachep = kmem_cache_create("lnet_rspt", sizeof(struct lnet_rsp_tracker),
0, 0, NULL);
if (!lnet_rspt_cachep)
return -ENOMEM;
lnet_msg_cachep = kmem_cache_create("lnet_msg", sizeof(struct lnet_msg),
0, 0, NULL);
if (!lnet_msg_cachep)
return -ENOMEM;
return 0;
}
static void
lnet_slab_cleanup(void)
{
if (lnet_msg_cachep) {
kmem_cache_destroy(lnet_msg_cachep);
lnet_msg_cachep = NULL;
}
if (lnet_rspt_cachep) {
kmem_cache_destroy(lnet_rspt_cachep);
lnet_rspt_cachep = NULL;
}
if (lnet_udsp_cachep) {
kmem_cache_destroy(lnet_udsp_cachep);
lnet_udsp_cachep = NULL;
}
if (lnet_small_mds_cachep) {
kmem_cache_destroy(lnet_small_mds_cachep);
lnet_small_mds_cachep = NULL;
}
if (lnet_mes_cachep) {
kmem_cache_destroy(lnet_mes_cachep);
lnet_mes_cachep = NULL;
}
}
static int
lnet_create_remote_nets_table(void)
{
int i;
struct list_head *hash;
LASSERT(the_lnet.ln_remote_nets_hash == NULL);
LASSERT(the_lnet.ln_remote_nets_hbits > 0);
CFS_ALLOC_PTR_ARRAY(hash, LNET_REMOTE_NETS_HASH_SIZE);
if (hash == NULL) {
CERROR("Failed to create remote nets hash table\n");
return -ENOMEM;
}
for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
INIT_LIST_HEAD(&hash[i]);
the_lnet.ln_remote_nets_hash = hash;
return 0;
}
static void
lnet_destroy_remote_nets_table(void)
{
int i;
if (the_lnet.ln_remote_nets_hash == NULL)
return;
for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
CFS_FREE_PTR_ARRAY(the_lnet.ln_remote_nets_hash,
LNET_REMOTE_NETS_HASH_SIZE);
the_lnet.ln_remote_nets_hash = NULL;
}
static void
lnet_destroy_locks(void)
{
if (the_lnet.ln_res_lock != NULL) {
cfs_percpt_lock_free(the_lnet.ln_res_lock);
the_lnet.ln_res_lock = NULL;
}
if (the_lnet.ln_net_lock != NULL) {
cfs_percpt_lock_free(the_lnet.ln_net_lock);
the_lnet.ln_net_lock = NULL;
}
}
static int
lnet_create_locks(void)
{
lnet_init_locks();
the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
if (the_lnet.ln_res_lock == NULL)
goto failed;
the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
if (the_lnet.ln_net_lock == NULL)
goto failed;
return 0;
failed:
lnet_destroy_locks();
return -ENOMEM;
}
static void lnet_assert_wire_constants(void)
{
/* Wire protocol assertions generated by 'wirecheck'
* running on Linux robert.bartonsoftware.com 2.6.8-1.521
* #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
* with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)
*/
/* Constants... */
BUILD_BUG_ON(LNET_PROTO_TCP_MAGIC != 0xeebc0ded);
BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MAJOR != 1);
BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MINOR != 0);
BUILD_BUG_ON(LNET_MSG_ACK != 0);
BUILD_BUG_ON(LNET_MSG_PUT != 1);
BUILD_BUG_ON(LNET_MSG_GET != 2);
BUILD_BUG_ON(LNET_MSG_REPLY != 3);
BUILD_BUG_ON(LNET_MSG_HELLO != 4);
BUILD_BUG_ON((int)sizeof(lnet_nid_t) != 8);
BUILD_BUG_ON((int)sizeof(lnet_pid_t) != 4);
/* Checks for struct lnet_nid */
BUILD_BUG_ON((int)sizeof(struct lnet_nid) != 20);
BUILD_BUG_ON((int)offsetof(struct lnet_nid, nid_size) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_nid *)0)->nid_size) != 1);
BUILD_BUG_ON((int)offsetof(struct lnet_nid, nid_type) != 1);
BUILD_BUG_ON((int)sizeof(((struct lnet_nid *)0)->nid_type) != 1);
BUILD_BUG_ON((int)offsetof(struct lnet_nid, nid_num) != 2);
BUILD_BUG_ON((int)sizeof(((struct lnet_nid *)0)->nid_num) != 2);
BUILD_BUG_ON((int)offsetof(struct lnet_nid, nid_addr) != 4);
BUILD_BUG_ON((int)sizeof(((struct lnet_nid *)0)->nid_addr) != 16);
/* Checks for struct lnet_process_id_packed */
BUILD_BUG_ON((int)sizeof(struct lnet_process_id_packed) != 12);
BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, nid) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->nid) != 8);
BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, pid) != 8);
BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->pid) != 4);
/* Checks for struct lnet_handle_wire */
BUILD_BUG_ON((int)sizeof(struct lnet_handle_wire) != 16);
BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
wh_interface_cookie) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
wh_object_cookie) != 8);
BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) != 8);
/* Checks for lnet_magicversion */
BUILD_BUG_ON((int)sizeof(struct lnet_magicversion) != 8);
BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, magic) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->magic) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, version_major) != 4);
BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_major) != 2);
BUILD_BUG_ON((int)offsetof(struct lnet_magicversion,
version_minor) != 6);
BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_minor) != 2);
/* Checks for _lnet_hdr_nid4 */
BUILD_BUG_ON((int)sizeof(struct _lnet_hdr_nid4) != 72);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, dest_nid) != 0);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->dest_nid) != 8);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, src_nid) != 8);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->src_nid) != 8);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, dest_pid) != 16);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->dest_pid) != 4);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, src_pid) != 20);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->src_pid) != 4);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, type) != 24);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->type) != 4);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, payload_length) != 28);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->payload_length) != 4);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg) != 32);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg) != 40);
/* Ack */
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.ack.dst_wmd) != 32);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.ack.dst_wmd) != 16);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.ack.match_bits) != 48);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.ack.match_bits) != 8);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.ack.mlength) != 56);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.ack.mlength) != 4);
/* Put */
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.put.ack_wmd) != 32);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.put.ack_wmd) != 16);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.put.match_bits) != 48);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.put.match_bits) != 8);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.put.hdr_data) != 56);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.put.hdr_data) != 8);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.put.ptl_index) != 64);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.put.ptl_index) != 4);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.put.offset) != 68);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.put.offset) != 4);
/* Get */
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.get.return_wmd) != 32);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.get.return_wmd) != 16);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.get.match_bits) != 48);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.get.match_bits) != 8);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.get.ptl_index) != 56);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.get.ptl_index) != 4);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.get.src_offset) != 60);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.get.src_offset) != 4);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.get.sink_length) != 64);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.get.sink_length) != 4);
/* Reply */
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.reply.dst_wmd) != 32);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.reply.dst_wmd) != 16);
/* Hello */
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.hello.incarnation) != 32);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.hello.incarnation) != 8);
BUILD_BUG_ON((int)offsetof(struct _lnet_hdr_nid4, msg.hello.type) != 40);
BUILD_BUG_ON((int)sizeof(((struct _lnet_hdr_nid4 *)0)->msg.hello.type) != 4);
/* Checks for struct lnet_ni_status and related constants */
BUILD_BUG_ON(LNET_NI_STATUS_INVALID != 0x00000000);
BUILD_BUG_ON(LNET_NI_STATUS_UP != 0x15aac0de);
BUILD_BUG_ON(LNET_NI_STATUS_DOWN != 0xdeadface);
/* Checks for struct lnet_ni_status */
BUILD_BUG_ON((int)sizeof(struct lnet_ni_status) != 16);
BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_nid) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_nid) != 8);
BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_status) != 8);
BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_status) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_msg_size) != 12);
BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_msg_size) != 4);
/* Checks for struct lnet_ni_large_status */
BUILD_BUG_ON((int)sizeof(struct lnet_ni_large_status) != 24);
BUILD_BUG_ON((int)offsetof(struct lnet_ni_large_status, ns_status) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_ni_large_status *)0)->ns_status) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_ni_large_status, ns_nid) != 4);
BUILD_BUG_ON((int)sizeof(((struct lnet_ni_large_status *)0)->ns_nid) != 20);
/* Checks for struct lnet_ping_info and related constants */
BUILD_BUG_ON(LNET_PROTO_PING_MAGIC != 0x70696E67);
BUILD_BUG_ON(LNET_PING_FEAT_INVAL != 0);
BUILD_BUG_ON(LNET_PING_FEAT_BASE != 1);
BUILD_BUG_ON(LNET_PING_FEAT_NI_STATUS != 2);
BUILD_BUG_ON(LNET_PING_FEAT_RTE_DISABLED != 4);
BUILD_BUG_ON(LNET_PING_FEAT_MULTI_RAIL != 8);
BUILD_BUG_ON(LNET_PING_FEAT_DISCOVERY != 16);
BUILD_BUG_ON(LNET_PING_FEAT_LARGE_ADDR != 32);
BUILD_BUG_ON(LNET_PING_FEAT_PRIMARY_LARGE != 64);
BUILD_BUG_ON(LNET_PING_FEAT_METADATA != 128);
BUILD_BUG_ON(LNET_PING_FEAT_BITS != 255);
/* Checks for struct lnet_ping_info */
BUILD_BUG_ON((int)sizeof(struct lnet_ping_info) != 16);
BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_magic) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_magic) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_features) != 4);
BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_features) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_pid) != 8);
BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_pid) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_nnis) != 12);
BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_nnis) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_ni) != 16);
BUILD_BUG_ON(offsetof(struct lnet_ping_info, pi_ni) != sizeof(struct lnet_ping_info));
/* Acceptor connection request */
BUILD_BUG_ON(LNET_PROTO_ACCEPTOR_VERSION != 1);
/* Checks for struct lnet_acceptor_connreq */
BUILD_BUG_ON((int)sizeof(struct lnet_acceptor_connreq) != 16);
BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_magic) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_magic) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_version) != 4);
BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_version) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_nid) != 8);
BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_nid) != 8);
/* Checks for struct lnet_acceptor_connreq_v2 */
BUILD_BUG_ON((int)sizeof(struct lnet_acceptor_connreq_v2) != 28);
BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq_v2, acr_magic) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq_v2 *)0)->acr_magic) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq_v2, acr_version) != 4);
BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq_v2 *)0)->acr_version) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq_v2, acr_nid) != 8);
BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq_v2 *)0)->acr_nid) != 20);
/* Checks for struct lnet_counters_common */
BUILD_BUG_ON((int)sizeof(struct lnet_counters_common) != 60);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_alloc) != 0);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_alloc) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_max) != 4);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_max) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_errors) != 8);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_errors) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_count) != 12);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_count) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_count) != 16);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_count) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_count) != 20);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_count) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_count) != 24);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_count) != 4);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_length) != 28);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_length) != 8);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_length) != 36);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_length) != 8);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_length) != 44);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_length) != 8);
BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_length) != 52);
BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_length) != 8);
}
static const struct lnet_lnd *lnet_find_lnd_by_type(__u32 type)
{
const struct lnet_lnd *lnd;
/* holding lnd mutex */
if (type >= NUM_LNDS)
return NULL;
lnd = the_lnet.ln_lnds[type];
LASSERT(!lnd || lnd->lnd_type == type);
return lnd;
}
unsigned int
lnet_get_lnd_timeout(void)
{
return lnet_lnd_timeout;
}
EXPORT_SYMBOL(lnet_get_lnd_timeout);
void
lnet_register_lnd(const struct lnet_lnd *lnd)
{
mutex_lock(&the_lnet.ln_lnd_mutex);
LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
the_lnet.ln_lnds[lnd->lnd_type] = lnd;
CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
mutex_unlock(&the_lnet.ln_lnd_mutex);
}
EXPORT_SYMBOL(lnet_register_lnd);
void
lnet_unregister_lnd(const struct lnet_lnd *lnd)
{
mutex_lock(&the_lnet.ln_lnd_mutex);
LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
the_lnet.ln_lnds[lnd->lnd_type] = NULL;
CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
mutex_unlock(&the_lnet.ln_lnd_mutex);
}
EXPORT_SYMBOL(lnet_unregister_lnd);
static void
lnet_counters_get_common_locked(struct lnet_counters_common *common)
{
struct lnet_counters *ctr;
int i;
/* FIXME !!! Their is no assert_lnet_net_locked() to ensure this
* actually called under the protection of the lnet_net_lock.
*/
memset(common, 0, sizeof(*common));
cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
common->lcc_msgs_max += ctr->lct_common.lcc_msgs_max;
common->lcc_msgs_alloc += ctr->lct_common.lcc_msgs_alloc;
common->lcc_errors += ctr->lct_common.lcc_errors;
common->lcc_send_count += ctr->lct_common.lcc_send_count;
common->lcc_recv_count += ctr->lct_common.lcc_recv_count;
common->lcc_route_count += ctr->lct_common.lcc_route_count;
common->lcc_drop_count += ctr->lct_common.lcc_drop_count;
common->lcc_send_length += ctr->lct_common.lcc_send_length;
common->lcc_recv_length += ctr->lct_common.lcc_recv_length;
common->lcc_route_length += ctr->lct_common.lcc_route_length;
common->lcc_drop_length += ctr->lct_common.lcc_drop_length;
}
}
void
lnet_counters_get_common(struct lnet_counters_common *common)
{
lnet_net_lock(LNET_LOCK_EX);
lnet_counters_get_common_locked(common);
lnet_net_unlock(LNET_LOCK_EX);
}
EXPORT_SYMBOL(lnet_counters_get_common);
int
lnet_counters_get(struct lnet_counters *counters)
{
struct lnet_counters *ctr;
struct lnet_counters_health *health = &counters->lct_health;
int i, rc = 0;
memset(counters, 0, sizeof(*counters));
lnet_net_lock(LNET_LOCK_EX);
if (the_lnet.ln_state != LNET_STATE_RUNNING)
GOTO(out_unlock, rc = -ENODEV);
lnet_counters_get_common_locked(&counters->lct_common);
cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
health->lch_rst_alloc += ctr->lct_health.lch_rst_alloc;
health->lch_resend_count += ctr->lct_health.lch_resend_count;
health->lch_response_timeout_count +=
ctr->lct_health.lch_response_timeout_count;
health->lch_local_interrupt_count +=
ctr->lct_health.lch_local_interrupt_count;
health->lch_local_dropped_count +=
ctr->lct_health.lch_local_dropped_count;
health->lch_local_aborted_count +=
ctr->lct_health.lch_local_aborted_count;
health->lch_local_no_route_count +=
ctr->lct_health.lch_local_no_route_count;
health->lch_local_timeout_count +=
ctr->lct_health.lch_local_timeout_count;
health->lch_local_error_count +=
ctr->lct_health.lch_local_error_count;
health->lch_remote_dropped_count +=
ctr->lct_health.lch_remote_dropped_count;
health->lch_remote_error_count +=
ctr->lct_health.lch_remote_error_count;
health->lch_remote_timeout_count +=
ctr->lct_health.lch_remote_timeout_count;
health->lch_network_timeout_count +=
ctr->lct_health.lch_network_timeout_count;
health->lch_failed_resends +=
ctr->lct_health.lch_failed_resends;
health->lch_successful_resends +=
ctr->lct_health.lch_successful_resends;
}
out_unlock:
lnet_net_unlock(LNET_LOCK_EX);
return rc;
}
EXPORT_SYMBOL(lnet_counters_get);
void
lnet_counters_reset(void)
{
struct lnet_counters *counters;
int i;
lnet_net_lock(LNET_LOCK_EX);
if (the_lnet.ln_state != LNET_STATE_RUNNING)
goto avoid_reset;
cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
memset(counters, 0, sizeof(struct lnet_counters));
avoid_reset:
lnet_net_unlock(LNET_LOCK_EX);
}
static char *
lnet_res_type2str(int type)
{
switch (type) {
case LNET_COOKIE_TYPE_MD:
return "MD";
case LNET_COOKIE_TYPE_ME:
return "ME";
case LNET_COOKIE_TYPE_EQ:
return "EQ";
default:
LBUG();
return NULL;
}
}
static void
lnet_res_container_cleanup(struct lnet_res_container *rec)
{
int count = 0;
if (rec->rec_type == 0) /* not set yet, it's uninitialized */
return;
while (!list_empty(&rec->rec_active)) {
struct list_head *e = rec->rec_active.next;
list_del_init(e);
if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
} else { /* NB: Active MEs should be attached on portals */
LBUG();
}
count++;
}
if (count > 0) {
/* Found alive MD/ME/EQ, user really should unlink/free
* all of them before finalize LNet, but if someone didn't,
* we have to recycle garbage for him */
CERROR("%d active elements on exit of %s container\n",
count, lnet_res_type2str(rec->rec_type));
}
if (rec->rec_lh_hash != NULL) {
CFS_FREE_PTR_ARRAY(rec->rec_lh_hash, LNET_LH_HASH_SIZE);
rec->rec_lh_hash = NULL;
}
rec->rec_type = 0; /* mark it as finalized */
}
static int
lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
{
int rc = 0;
int i;
LASSERT(rec->rec_type == 0);
rec->rec_type = type;
INIT_LIST_HEAD(&rec->rec_active);
rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
/* Arbitrary choice of hash table size */
LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
if (rec->rec_lh_hash == NULL) {
rc = -ENOMEM;
goto out;
}
for (i = 0; i < LNET_LH_HASH_SIZE; i++)
INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
return 0;
out:
CERROR("Failed to setup %s resource container\n",
lnet_res_type2str(type));
lnet_res_container_cleanup(rec);
return rc;
}
static void
lnet_res_containers_destroy(struct lnet_res_container **recs)
{
struct lnet_res_container *rec;
int i;
cfs_percpt_for_each(rec, i, recs)
lnet_res_container_cleanup(rec);
cfs_percpt_free(recs);
}
static struct lnet_res_container **
lnet_res_containers_create(int type)
{
struct lnet_res_container **recs;
struct lnet_res_container *rec;
int rc;
int i;
recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
if (recs == NULL) {
CERROR("Failed to allocate %s resource containers\n",
lnet_res_type2str(type));
return NULL;
}
cfs_percpt_for_each(rec, i, recs) {
rc = lnet_res_container_setup(rec, i, type);
if (rc != 0) {
lnet_res_containers_destroy(recs);
return NULL;
}
}
return recs;
}
struct lnet_libhandle *
lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
{
/* ALWAYS called with lnet_res_lock held */
struct list_head *head;
struct lnet_libhandle *lh;
unsigned int hash;
if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
return NULL;
hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
list_for_each_entry(lh, head, lh_hash_chain) {
if (lh->lh_cookie == cookie)
return lh;
}
return NULL;
}
void
lnet_res_lh_initialize(struct lnet_res_container *rec,
struct lnet_libhandle *lh)
{
/* ALWAYS called with lnet_res_lock held */
unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
unsigned int hash;
lh->lh_cookie = rec->rec_lh_cookie;
rec->rec_lh_cookie += 1 << ibits;
hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
}
struct list_head **
lnet_create_array_of_queues(void)
{
struct list_head **qs;
struct list_head *q;
int i;
qs = cfs_percpt_alloc(lnet_cpt_table(),
sizeof(struct list_head));
if (!qs) {
CERROR("Failed to allocate queues\n");
return NULL;
}
cfs_percpt_for_each(q, i, qs)
INIT_LIST_HEAD(q);
return qs;
}
static int lnet_unprepare(void);
static int
lnet_prepare(lnet_pid_t requested_pid)
{
/* Prepare to bring up the network */
struct lnet_res_container **recs;
int rc = 0;
if (requested_pid == LNET_PID_ANY) {
/* Don't instantiate LNET just for me */
return -ENETDOWN;
}
LASSERT(the_lnet.ln_refcount == 0);
the_lnet.ln_routing = LNET_ROUTING_DISABLED;
LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
the_lnet.ln_pid = requested_pid;
INIT_LIST_HEAD(&the_lnet.ln_test_peers);
INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
INIT_LIST_HEAD(&the_lnet.ln_nets);
INIT_LIST_HEAD(&the_lnet.ln_routers);
INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
INIT_LIST_HEAD(&the_lnet.ln_dc_request);
INIT_LIST_HEAD(&the_lnet.ln_dc_working);
INIT_LIST_HEAD(&the_lnet.ln_dc_expired);
INIT_LIST_HEAD(&the_lnet.ln_mt_localNIRecovq);
INIT_LIST_HEAD(&the_lnet.ln_mt_peerNIRecovq);
INIT_LIST_HEAD(&the_lnet.ln_udsp_list);
init_waitqueue_head(&the_lnet.ln_dc_waitq);
the_lnet.ln_mt_handler = NULL;
init_completion(&the_lnet.ln_started);
atomic_set(&the_lnet.ln_late_msg_count, 0);
atomic64_set(&the_lnet.ln_late_msg_nsecs, 0);
rc = lnet_slab_setup();
if (rc != 0)
goto failed;
rc = lnet_create_remote_nets_table();
if (rc != 0)
goto failed;
/*
* NB the interface cookie in wire handles guards against delayed
* replies and ACKs appearing valid after reboot.
*/
the_lnet.ln_interface_cookie = ktime_get_real_ns();
the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
sizeof(struct lnet_counters));
if (the_lnet.ln_counters == NULL) {
CERROR("Failed to allocate counters for LNet\n");
rc = -ENOMEM;
goto failed;
}
rc = lnet_peer_tables_create();
if (rc != 0)
goto failed;
rc = lnet_msg_containers_create();
if (rc != 0)
goto failed;
rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
LNET_COOKIE_TYPE_EQ);
if (rc != 0)
goto failed;
recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
if (recs == NULL) {
rc = -ENOMEM;
goto failed;
}
the_lnet.ln_md_containers = recs;
rc = lnet_portals_create();
if (rc != 0) {
CERROR("Failed to create portals for LNet: %d\n", rc);
goto failed;
}
the_lnet.ln_mt_zombie_rstqs = lnet_create_array_of_queues();
if (!the_lnet.ln_mt_zombie_rstqs) {
rc = -ENOMEM;
goto failed;
}
return 0;
failed:
lnet_unprepare();
return rc;
}
static int
lnet_unprepare(void)
{
/* NB no LNET_LOCK since this is the last reference. All LND instances
* have shut down already, so it is safe to unlink and free all
* descriptors, even those that appear committed to a network op (eg MD
* with non-zero pending count)
*/
lnet_fail_nid(&LNET_ANY_NID, 0);
LASSERT(the_lnet.ln_refcount == 0);
LASSERT(list_empty(&the_lnet.ln_test_peers));
LASSERT(list_empty(&the_lnet.ln_nets));
if (the_lnet.ln_mt_zombie_rstqs) {
lnet_clean_zombie_rstqs();
the_lnet.ln_mt_zombie_rstqs = NULL;
}
lnet_assert_handler_unused(the_lnet.ln_mt_handler);
the_lnet.ln_mt_handler = NULL;
lnet_portals_destroy();
if (the_lnet.ln_md_containers != NULL) {
lnet_res_containers_destroy(the_lnet.ln_md_containers);
the_lnet.ln_md_containers = NULL;
}
lnet_res_container_cleanup(&the_lnet.ln_eq_container);
lnet_msg_containers_destroy();
lnet_peer_uninit();
lnet_rtrpools_free(0);
if (the_lnet.ln_counters != NULL) {
cfs_percpt_free(the_lnet.ln_counters);
the_lnet.ln_counters = NULL;
}
lnet_destroy_remote_nets_table();
lnet_udsp_destroy(true);
lnet_slab_cleanup();
return 0;
}
struct lnet_ni *
lnet_net2ni_locked(__u32 net_id, int cpt)
{
struct lnet_ni *ni;
struct lnet_net *net;
LASSERT(cpt != LNET_LOCK_EX);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
if (net->net_id == net_id) {
ni = list_first_entry(&net->net_ni_list, struct lnet_ni,
ni_netlist);
return ni;
}
}
return NULL;
}
struct lnet_ni *
lnet_net2ni_addref(__u32 net)
{
struct lnet_ni *ni;
lnet_net_lock(0);
ni = lnet_net2ni_locked(net, 0);
if (ni)
lnet_ni_addref_locked(ni, 0);
lnet_net_unlock(0);
return ni;
}
EXPORT_SYMBOL(lnet_net2ni_addref);
struct lnet_net *
lnet_get_net_locked(__u32 net_id)
{
struct lnet_net *net;
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
if (net->net_id == net_id)
return net;
}
return NULL;
}
void
lnet_net_clr_pref_rtrs(struct lnet_net *net)
{
struct list_head zombies;
struct lnet_nid_list *ne;
struct lnet_nid_list *tmp;
INIT_LIST_HEAD(&zombies);
lnet_net_lock(LNET_LOCK_EX);
list_splice_init(&net->net_rtr_pref_nids, &zombies);
lnet_net_unlock(LNET_LOCK_EX);
list_for_each_entry_safe(ne, tmp, &zombies, nl_list) {
list_del_init(&ne->nl_list);
LIBCFS_FREE(ne, sizeof(*ne));
}
}
int
lnet_net_add_pref_rtr(struct lnet_net *net,
struct lnet_nid *gw_nid)
__must_hold(&the_lnet.ln_api_mutex)
{
struct lnet_nid_list *ne;
/* This function is called with api_mutex held. When the api_mutex
* is held the list can not be modified, as it is only modified as
* a result of applying a UDSP and that happens under api_mutex
* lock.
*/
list_for_each_entry(ne, &net->net_rtr_pref_nids, nl_list) {
if (nid_same(&ne->nl_nid, gw_nid))
return -EEXIST;
}
LIBCFS_ALLOC(ne, sizeof(*ne));
if (!ne)
return -ENOMEM;
ne->nl_nid = *gw_nid;
/* Lock the cpt to protect against addition and checks in the
* selection algorithm
*/
lnet_net_lock(LNET_LOCK_EX);
list_add(&ne->nl_list, &net->net_rtr_pref_nids);
lnet_net_unlock(LNET_LOCK_EX);
return 0;
}
static unsigned int
lnet_nid4_cpt_hash(lnet_nid_t nid, unsigned int number)
{
__u64 key = nid;
__u16 lnd = LNET_NETTYP(LNET_NIDNET(nid));
unsigned int cpt;
if (lnd == KFILND) {
cpt = hash_long(key, LNET_CPT_BITS);
/* NB: The number of CPTs needn't be a power of 2 */
if (cpt >= number)
cpt = (key + cpt + (cpt >> 1)) % number;
} else {
__u64 pair_bits = 0x0001000100010001LLU;
__u64 mask = pair_bits * 0xFF;
__u64 pair_sum;
/* For ipv4 NIDs, use (sum-by-multiplication of nid bytes) mod
* (number of CPTs) to match nid to a CPT.
*/
pair_sum = (key & mask) + ((key >> 8) & mask);
pair_sum = (pair_sum * pair_bits) >> 48;
cpt = (unsigned int)(pair_sum) % number;
}
CDEBUG(D_NET, "Match nid %s to cpt %u\n",
libcfs_nid2str(nid), cpt);
return cpt;
}
unsigned int
lnet_nid_cpt_hash(struct lnet_nid *nid, unsigned int number)
{
unsigned int val;
u32 h = 0;
int i;
LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
if (number == 1)
return 0;
if (nid_is_nid4(nid))
return lnet_nid4_cpt_hash(lnet_nid_to_nid4(nid), number);
for (i = 0; i < 4; i++)
h = hash_32(nid->nid_addr[i]^h, 32);
val = hash_32(LNET_NID_NET(nid) ^ h, LNET_CPT_BITS);
if (val < number)
return val;
return (unsigned int)(h + val + (val >> 1)) % number;
}
int
lnet_cpt_of_nid_locked(struct lnet_nid *nid, struct lnet_ni *ni)
{
struct lnet_net *net;
/* must called with hold of lnet_net_lock */
if (LNET_CPT_NUMBER == 1)
return 0; /* the only one */
/*
* If NI is provided then use the CPT identified in the NI cpt
* list if one exists. If one doesn't exist, then that NI is
* associated with all CPTs and it follows that the net it belongs
* to is implicitly associated with all CPTs, so just hash the nid
* and return that.
*/
if (ni != NULL) {
if (ni->ni_cpts != NULL)
return ni->ni_cpts[lnet_nid_cpt_hash(nid,
ni->ni_ncpts)];
else
return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
}
/* no NI provided so look at the net */
net = lnet_get_net_locked(LNET_NID_NET(nid));
if (net != NULL && net->net_cpts != NULL) {
return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
}
return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
}
/*
* Map a NID to a CPT.
*
* We optimize all cases where the NI is provided with fast paths that avoid
* lock acquisition.
*
* Safety analysis for the fast path:
*
* 1. The ni_cpts pointer and array are set once at NI creation (in
* lnet_ni_alloc()) and never modified afterward, so reading them
* is safe once the NI exists.
*
* 2. When this function is called from the receive path (lnet_parse,
* lnet_parse_put, lnet_parse_get, etc.), the NI is guaranteed valid:
* - The LND is actively running and receiving messages
* - NI shutdown calls lnd_shutdown() first, which must quiesce all
* receive activity before returning
* - Only after lnd_shutdown() completes is lnet_ni_free() called
* - Therefore, the NI cannot be freed while receives are in flight
*
* 3. For callers that don't have implicit NI validity guarantees (e.g.,
* those that looked up the NI themselves), passing ni=NULL forces
* the safe slow path that acquires the net_lock.
*
* Lock is only needed when ni is NULL (must look up the network under lock).
*/
int
lnet_nid2cpt(struct lnet_nid *nid, struct lnet_ni *ni)
{
int cpt;
int cpt2;
if (LNET_CPT_NUMBER == 1)
return 0; /* the only one */
/*
* Fast path: NI provided from receive callback and associated
* with all CPTs. The NI is implicitly valid (see function header).
*/
if (ni) {
if (ni->ni_cpts)
return ni->ni_cpts[lnet_nid_cpt_hash(nid,
ni->ni_ncpts)];
else
return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
}
/*
* Fast path for ni==NULL: if no NIs/nets have restricted CPTs,
* we can just hash without looking up the network.
*/
if (atomic_read(&the_lnet.ln_cpt_restricted_count) == 0)
return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
/* Slow path: ni is NULL, need lock for network lookup */
cpt = lnet_net_lock_current();
cpt2 = lnet_cpt_of_nid_locked(nid, ni);
lnet_net_unlock(cpt);
return cpt2;
}
EXPORT_SYMBOL(lnet_nid2cpt);
int
lnet_cpt_of_nid(lnet_nid_t nid4, struct lnet_ni *ni)
{
struct lnet_nid nid;
if (LNET_CPT_NUMBER == 1)
return 0; /* the only one */
lnet_nid4_to_nid(nid4, &nid);
return lnet_nid2cpt(&nid, ni);
}
EXPORT_SYMBOL(lnet_cpt_of_nid);
int
lnet_islocalnet_locked(__u32 net_id)
{
struct lnet_net *net;
bool local;
net = lnet_get_net_locked(net_id);
local = net != NULL;
return local;
}
int
lnet_islocalnet(__u32 net_id)
{
int cpt;
bool local;
cpt = lnet_net_lock_current();
local = lnet_islocalnet_locked(net_id);
lnet_net_unlock(cpt);
return local;
}
struct lnet_ni *
lnet_nid_to_ni_locked(struct lnet_nid *nid, int cpt)
{
struct lnet_net *net;
struct lnet_ni *ni;
LASSERT(cpt != LNET_LOCK_EX);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (nid_same(&ni->ni_nid, nid))
return ni;
}
}
return NULL;
}
struct lnet_ni *
lnet_nid_to_ni_addref(struct lnet_nid *nid)
{
struct lnet_ni *ni;
lnet_net_lock(0);
ni = lnet_nid_to_ni_locked(nid, 0);
if (ni)
lnet_ni_addref_locked(ni, 0);
lnet_net_unlock(0);
return ni;
}
EXPORT_SYMBOL(lnet_nid_to_ni_addref);
int
lnet_islocalnid(struct lnet_nid *nid)
{
struct lnet_ni *ni;
int cpt;
cpt = lnet_net_lock_current();
ni = lnet_nid_to_ni_locked(nid, cpt);
lnet_net_unlock(cpt);
return ni != NULL;
}
int
lnet_count_acceptor_nets(void)
{
/* Return the # of NIs that need the acceptor. */
int count = 0;
struct lnet_net *net;
int cpt;
cpt = lnet_net_lock_current();
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
/* all socklnd type networks should have the acceptor
* thread started */
if (net->net_lnd->lnd_accept != NULL)
count++;
}
lnet_net_unlock(cpt);
return count;
}
static size_t lnet_size_of_metadata(int nnis)
{
return sizeof(__u32) + (sizeof(struct lnet_nid_md_entry) * nnis);
}
static size_t lnet_extra_bytes_for_md(void)
{
struct lnet_net *net;
struct lnet_ni *ni;
if (CFS_FAIL_CHECK(CFS_FAIL_TEST_PING_MD))
return lnet_size_of_metadata(lnet_interfaces_max);
list_for_each_entry(net, &the_lnet.ln_nets, net_list)
list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
if (ni->ni_net->net_lnd->lnd_get_nid_metadata)
return lnet_size_of_metadata(lnet_interfaces_max);
return 0;
}
struct lnet_ping_buffer *
lnet_ping_buffer_alloc(int nbytes, gfp_t gfp)
{
struct lnet_ping_buffer *pbuf;
LIBCFS_ALLOC_GFP(pbuf, LNET_PING_BUFFER_SIZE(nbytes), gfp);
if (pbuf) {
pbuf->pb_nbytes = nbytes; /* sizeof of pb_info */
pbuf->pb_needs_post = false;
kref_init(&pbuf->pb_refcnt);
}
return pbuf;
}
void
lnet_ping_buffer_free(struct kref *kerf)
{
struct lnet_ping_buffer *pbuf = container_of(kerf,
struct lnet_ping_buffer,
pb_refcnt);
wake_up_var(&pbuf->pb_refcnt);
LIBCFS_FREE(pbuf, LNET_PING_BUFFER_SIZE(pbuf->pb_nbytes));
}
static struct lnet_ping_buffer *
lnet_ping_target_create(int nbytes)
{
struct lnet_ping_buffer *pbuf;
pbuf = lnet_ping_buffer_alloc(nbytes, GFP_NOFS);
if (pbuf == NULL) {
CERROR("Can't allocate ping source [%d]\n", nbytes);
return NULL;
}
pbuf->pb_info.pi_nnis = 0;
pbuf->pb_info.pi_pid = the_lnet.ln_pid;
pbuf->pb_info.pi_magic = LNET_PROTO_PING_MAGIC;
pbuf->pb_info.pi_features =
LNET_PING_FEAT_NI_STATUS | LNET_PING_FEAT_MULTI_RAIL;
return pbuf;
}
static inline int
lnet_get_net_ni_bytes_locked(struct lnet_net *net)
{
struct lnet_ni *ni;
int bytes = 0;
list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
bytes += lnet_ping_sts_size(&ni->ni_nid);
return bytes;
}
static inline int
lnet_get_ni_bytes(void)
{
struct lnet_ni *ni;
struct lnet_net *net;
int bytes = 0;
lnet_net_lock(0);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
bytes += lnet_ping_sts_size(&ni->ni_nid);
}
lnet_net_unlock(0);
return bytes;
}
void
lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf)
{
struct lnet_ni_large_status *lstat, *lend;
struct lnet_ni_status *stat, *end;
int nnis;
int i;
__swab32s(&pbuf->pb_info.pi_magic);
__swab32s(&pbuf->pb_info.pi_features);
__swab32s(&pbuf->pb_info.pi_pid);
__swab32s(&pbuf->pb_info.pi_nnis);
nnis = pbuf->pb_info.pi_nnis;
stat = &pbuf->pb_info.pi_ni[0];
end = (void *)&pbuf->pb_info + pbuf->pb_nbytes;
for (i = 0; i < nnis && stat + 1 <= end; i++, stat++) {
__swab64s(&stat->ns_nid);
__swab32s(&stat->ns_status);
if (i == 0)
/* Might be total size */
__swab32s(&stat->ns_msg_size);
}
if (!(pbuf->pb_info.pi_features & LNET_PING_FEAT_LARGE_ADDR))
return;
lstat = (struct lnet_ni_large_status *)stat;
lend = (void *)end;
while (lstat + 1 <= lend) {
__swab32s(&lstat->ns_status);
/* struct lnet_nid never needs to be swabed */
lstat = lnet_ping_sts_next(lstat);
}
}
int
lnet_ping_info_validate(struct lnet_ping_info *pinfo)
{
if (!pinfo)
return -EINVAL;
if (pinfo->pi_magic != LNET_PROTO_PING_MAGIC)
return -EPROTO;
if (!(pinfo->pi_features & LNET_PING_FEAT_NI_STATUS))
return -EPROTO;
/* Loopback is guaranteed to be present */
if (pinfo->pi_nnis < 1 || pinfo->pi_nnis > lnet_interfaces_max)
return -ERANGE;
if (LNET_PING_INFO_LONI(pinfo) != LNET_NID_LO_0)
return -EPROTO;
return 0;
}
static void
lnet_ping_target_destroy(void)
{
struct lnet_net *net;
struct lnet_ni *ni;
lnet_net_lock(LNET_LOCK_EX);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
lnet_ni_lock(ni);
ni->ni_status = NULL;
lnet_ni_unlock(ni);
}
}
kref_put(&(the_lnet.ln_ping_target)->pb_refcnt, lnet_ping_buffer_free);
the_lnet.ln_ping_target = NULL;
lnet_net_unlock(LNET_LOCK_EX);
}
static void
lnet_ping_target_event_handler(struct lnet_event *event)
{
struct lnet_ping_buffer *pbuf = event->md_user_ptr;
if (event->unlinked)
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
}
static int
lnet_ping_target_setup(struct lnet_ping_buffer **ppbuf,
struct lnet_handle_md *ping_mdh,
int ni_bytes, bool set_eq)
{
struct lnet_processid id = {
.nid = LNET_ANY_NID,
.pid = LNET_PID_ANY
};
struct lnet_me *me;
struct lnet_md md = { NULL };
int rc;
ni_bytes += lnet_extra_bytes_for_md();
if (set_eq)
the_lnet.ln_ping_target_handler =
lnet_ping_target_event_handler;
*ppbuf = lnet_ping_target_create(ni_bytes);
if (*ppbuf == NULL) {
rc = -ENOMEM;
goto fail_free_eq;
}
/* Ping target ME/MD */
me = LNetMEAttach(LNET_RESERVED_PORTAL, &id,
LNET_PROTO_PING_MATCHBITS, 0,
LNET_UNLINK, LNET_INS_AFTER);
if (IS_ERR(me)) {
rc = PTR_ERR(me);
CERROR("Can't create ping target ME: %d\n", rc);
goto fail_decref_ping_buffer;
}
/* initialize md content */
md.umd_start = &(*ppbuf)->pb_info;
md.umd_length = (*ppbuf)->pb_nbytes;
md.umd_threshold = LNET_MD_THRESH_INF;
md.umd_max_size = 0;
md.umd_options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
LNET_MD_MANAGE_REMOTE;
md.umd_handler = the_lnet.ln_ping_target_handler;
md.umd_user_ptr = *ppbuf;
rc = LNetMDAttach(me, &md, LNET_RETAIN, ping_mdh);
if (rc != 0) {
CERROR("Can't attach ping target MD: %d\n", rc);
goto fail_decref_ping_buffer;
}
kref_get(&(*ppbuf)->pb_refcnt);
return 0;
fail_decref_ping_buffer:
kref_put(&(*ppbuf)->pb_refcnt, lnet_ping_buffer_free);
*ppbuf = NULL;
fail_free_eq:
return rc;
}
static void
lnet_ping_md_unlink(struct lnet_ping_buffer *pbuf,
struct lnet_handle_md *ping_mdh)
{
LNetMDUnlink(*ping_mdh);
LNetInvalidateMDHandle(ping_mdh);
/* NB the MD could be busy; this just starts the unlink */
wait_var_event_warning(&pbuf->pb_refcnt,
kref_read(&pbuf->pb_refcnt) == 1,
"Still waiting for ping data MD to unlink\n");
}
static bool lnet_peer_has_metadata(struct lnet_ping_buffer *pbuf)
{
int i = 0;
if (pbuf->pb_info.pi_features & LNET_PING_FEAT_METADATA)
return true;
/* EFA small-NIDs will always have metadata */
for (i = 0; i < pbuf->pb_info.pi_nnis; i++)
if (LNET_NETTYP(LNET_NIDNET(pbuf->pb_info.pi_ni[i].ns_nid)) == EFALND)
return true;
return false;
}
static void lnet_poison_nid_md_buffer(struct lnet_nid_md_entry *entry)
{
int i = 0;
for (i = 0; i < LNET_MD_BUFFER_SZ; i++)
entry->buffer[i] = 0x5a;
}
static void
lnet_ping_target_install_locked(struct lnet_ping_buffer *pbuf)
{
struct lnet_ni_large_status *lns, *lend;
struct lnet_ni_status *ns, *end;
struct lnet_nid_metadata *data;
struct lnet_net *net;
struct lnet_ni *ni;
int rc = 0;
int i = 0;
pbuf->pb_info.pi_nnis = 0;
ns = &pbuf->pb_info.pi_ni[0];
end = (void *)&pbuf->pb_info + pbuf->pb_nbytes;
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (!nid_is_nid4(&ni->ni_nid)) {
if (ns == &pbuf->pb_info.pi_ni[1]) {
/* This is primary, and it is long */
pbuf->pb_info.pi_features |=
LNET_PING_FEAT_PRIMARY_LARGE;
}
continue;
}
LASSERT(ns + 1 <= end);
ns->ns_nid = lnet_nid_to_nid4(&ni->ni_nid);
lnet_ni_lock(ni);
ns->ns_status = lnet_ni_get_status_locked(ni);
ni->ni_status = &ns->ns_status;
lnet_ni_unlock(ni);
pbuf->pb_info.pi_nnis++;
ns++;
}
}
lns = (void *)ns;
lend = (void *)end;
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (nid_is_nid4(&ni->ni_nid))
continue;
LASSERT(lns + 1 <= lend);
lns->ns_nid = ni->ni_nid;
lnet_ni_lock(ni);
lns->ns_status = lnet_ni_get_status_locked(ni);
ni->ni_status = &lns->ns_status;
lnet_ni_unlock(ni);
lns = lnet_ping_sts_next(lns);
}
}
if ((void *)lns > (void *)ns) {
/* Record total info size */
pbuf->pb_info.pi_ni[0].ns_msg_size =
(void *)lns - (void *)&pbuf->pb_info;
pbuf->pb_info.pi_features |= LNET_PING_FEAT_LARGE_ADDR;
}
data = (struct lnet_nid_metadata *)lns;
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
const struct lnet_lnd *lnd = ni->ni_net->net_lnd;
if (i >= lnet_interfaces_max) {
CERROR("Refusing to send more than %i mappings",
lnet_interfaces_max);
break;
}
if (CFS_FAIL_CHECK(CFS_FAIL_TEST_PING_MD) &&
lnd->lnd_type != LOLND) {
LASSERT((void *)(&data->nid_mappings[i] + 1) <=
(void *)lend);
lnet_poison_nid_md_buffer(&data->nid_mappings[i]);
} else if (lnd->lnd_get_nid_metadata) {
LASSERT((void *)(&data->nid_mappings[i] + 1) <=
(void *)lend);
lnd->lnd_get_nid_metadata(ni, &data->nid_mappings[i]);
} else {
continue;
}
data->nid_mappings[i].nid = lnet_nid_to_nid4(&ni->ni_nid);
pbuf->pb_info.pi_features |= LNET_PING_FEAT_METADATA;
i++;
}
}
if (lnet_peer_has_metadata(pbuf))
data->num_nid_mappings = i;
/* We (ab)use the ns_status of the loopback interface to
* transmit the sequence number. The first interface listed
* must be the loopback interface.
*/
rc = lnet_ping_info_validate(&pbuf->pb_info);
LASSERTF(!rc, "Invalid ping target: %d\n", rc);
LNET_PING_BUFFER_SEQNO(pbuf) =
atomic_inc_return(&the_lnet.ln_ping_target_seqno);
}
static void
lnet_ping_target_update(struct lnet_ping_buffer *pbuf,
struct lnet_handle_md ping_mdh)
__must_hold(&the_lnet.ln_api_mutex)
{
struct lnet_ping_buffer *old_pbuf = NULL;
struct lnet_handle_md old_ping_md;
/* switch the NIs to point to the new ping info created */
lnet_net_lock(LNET_LOCK_EX);
if (lnet_routing_disabled())
pbuf->pb_info.pi_features |= LNET_PING_FEAT_RTE_DISABLED;
if (!lnet_peer_discovery_disabled)
pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
/* Ensure only known feature bits have been set. */
LASSERT(pbuf->pb_info.pi_features & LNET_PING_FEAT_BITS);
LASSERT(!(pbuf->pb_info.pi_features & ~LNET_PING_FEAT_BITS));
lnet_ping_target_install_locked(pbuf);
if (the_lnet.ln_ping_target) {
old_pbuf = the_lnet.ln_ping_target;
old_ping_md = the_lnet.ln_ping_target_md;
}
the_lnet.ln_ping_target_md = ping_mdh;
the_lnet.ln_ping_target = pbuf;
lnet_net_unlock(LNET_LOCK_EX);
if (old_pbuf) {
/* unlink and free the old ping info.
* There may be outstanding traffic on this MD, and
* ln_api_mutex may be required to finalize that
* traffic. Release ln_api_mutex while we wait for
* refs on this ping buffer to drop
*/
mutex_unlock(&the_lnet.ln_api_mutex);
lnet_ping_md_unlink(old_pbuf, &old_ping_md);
mutex_lock(&the_lnet.ln_api_mutex);
kref_put(&old_pbuf->pb_refcnt, lnet_ping_buffer_free);
}
lnet_push_update_to_peers(0);
}
static void
lnet_ping_target_fini(void)
{
lnet_ping_md_unlink(the_lnet.ln_ping_target,
&the_lnet.ln_ping_target_md);
lnet_assert_handler_unused(the_lnet.ln_ping_target_handler);
lnet_ping_target_destroy();
}
/* Resize the push target. */
int lnet_push_target_resize(void)
{
struct lnet_handle_md mdh;
struct lnet_handle_md old_mdh;
struct lnet_ping_buffer *pbuf;
struct lnet_ping_buffer *old_pbuf;
int nbytes;
int rc;
again:
nbytes = the_lnet.ln_push_target_nbytes;
if (nbytes <= 0) {
CDEBUG(D_NET, "Invalid nbytes %d\n", nbytes);
return -EINVAL;
}
/* NB: lnet_ping_buffer_alloc() sets pbuf refcount to 1. That ref is
* dropped when we need to resize again (see "old_pbuf" below) or when
* LNet is shutdown (see lnet_push_target_fini())
*/
pbuf = lnet_ping_buffer_alloc(nbytes, GFP_NOFS);
if (!pbuf) {
CDEBUG(D_NET, "Can't allocate pbuf for nbytes %d\n", nbytes);
return -ENOMEM;
}
rc = lnet_push_target_post(pbuf, &mdh);
if (rc) {
CDEBUG(D_NET, "Failed to post push target: %d\n", rc);
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
return rc;
}
lnet_net_lock(LNET_LOCK_EX);
old_pbuf = the_lnet.ln_push_target;
old_mdh = the_lnet.ln_push_target_md;
the_lnet.ln_push_target = pbuf;
the_lnet.ln_push_target_md = mdh;
lnet_net_unlock(LNET_LOCK_EX);
if (old_pbuf) {
LNetMDUnlink(old_mdh);
/* Drop ref set by lnet_ping_buffer_alloc() */
kref_put(&old_pbuf->pb_refcnt, lnet_ping_buffer_free);
}
/* Received another push or reply that requires a larger buffer */
if (nbytes < the_lnet.ln_push_target_nbytes)
goto again;
CDEBUG(D_NET, "nbytes %d success\n", nbytes);
return 0;
}
int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
struct lnet_handle_md *mdhp)
{
struct lnet_processid id = { LNET_ANY_NID, LNET_PID_ANY };
struct lnet_md md = { NULL };
struct lnet_me *me;
int rc;
me = LNetMEAttach(LNET_RESERVED_PORTAL, &id,
LNET_PROTO_PING_MATCHBITS, 0,
LNET_UNLINK, LNET_INS_AFTER);
if (IS_ERR(me)) {
rc = PTR_ERR(me);
CERROR("Can't create push target ME: %d\n", rc);
return rc;
}
pbuf->pb_needs_post = false;
/* This reference is dropped by lnet_push_target_event_handler() */
kref_get(&pbuf->pb_refcnt);
/* initialize md content */
md.umd_start = &pbuf->pb_info;
md.umd_length = pbuf->pb_nbytes;
md.umd_threshold = 1;
md.umd_max_size = 0;
md.umd_options = LNET_MD_OP_PUT | LNET_MD_TRUNCATE;
md.umd_user_ptr = pbuf;
md.umd_handler = the_lnet.ln_push_target_handler;
rc = LNetMDAttach(me, &md, LNET_UNLINK, mdhp);
if (rc) {
CERROR("Can't attach push MD: %d\n", rc);
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
pbuf->pb_needs_post = true;
return rc;
}
CDEBUG(D_NET, "posted push target %p\n", pbuf);
return 0;
}
static void lnet_push_target_event_handler(struct lnet_event *ev)
{
struct lnet_ping_buffer *pbuf = ev->md_user_ptr;
CDEBUG(D_NET, "type %d status %d unlinked %d\n", ev->type, ev->status,
ev->unlinked);
if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC))
lnet_swap_pinginfo(pbuf);
if (ev->type == LNET_EVENT_UNLINK) {
/* Drop ref added by lnet_push_target_post() */
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
return;
}
lnet_peer_push_event(ev);
if (ev->unlinked)
/* Drop ref added by lnet_push_target_post */
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
}
/* Initialize the push target. */
static int lnet_push_target_init(void)
{
int rc;
if (the_lnet.ln_push_target)
return -EALREADY;
the_lnet.ln_push_target_handler =
lnet_push_target_event_handler;
rc = LNetSetLazyPortal(LNET_RESERVED_PORTAL);
LASSERT(rc == 0);
/* Start at the required minimum, we'll enlarge if required. */
the_lnet.ln_push_target_nbytes = LNET_PING_INFO_MIN_SIZE;
rc = lnet_push_target_resize();
if (rc) {
LNetClearLazyPortal(LNET_RESERVED_PORTAL);
the_lnet.ln_push_target_handler = NULL;
}
return rc;
}
/* Clean up the push target. */
static void lnet_push_target_fini(void)
{
if (!the_lnet.ln_push_target)
return;
/* Unlink and invalidate to prevent new references. */
LNetMDUnlink(the_lnet.ln_push_target_md);
LNetInvalidateMDHandle(&the_lnet.ln_push_target_md);
/* Wait for the unlink to complete. */
wait_var_event_warning(&the_lnet.ln_push_target->pb_refcnt,
kref_read(&the_lnet.ln_push_target->pb_refcnt) == 1,
"Still waiting for ping data MD to unlink\n");
/* Drop ref set by lnet_ping_buffer_alloc() */
kref_put(&(the_lnet.ln_push_target)->pb_refcnt, lnet_ping_buffer_free);
the_lnet.ln_push_target = NULL;
the_lnet.ln_push_target_nbytes = 0;
LNetClearLazyPortal(LNET_RESERVED_PORTAL);
lnet_assert_handler_unused(the_lnet.ln_push_target_handler);
the_lnet.ln_push_target_handler = NULL;
}
static int
lnet_ni_tq_credits(struct lnet_ni *ni)
{
int credits;
LASSERT(ni->ni_ncpts >= 1);
if (ni->ni_ncpts == 1)
return ni->ni_net->net_tunables.lct_max_tx_credits;
credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
return credits;
}
static void
lnet_ni_unlink_locked(struct lnet_ni *ni)
{
/* move it to zombie list and nobody can find it anymore */
LASSERT(!list_empty(&ni->ni_netlist));
list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
atomic_dec(&the_lnet.ln_ni_total);
lnet_ni_decref_locked(ni, 0);
}
static void
lnet_clear_zombies_nis_locked(struct lnet_net *net)
{
struct list_head *zombie_list = &net->net_ni_zombie;
enum lnet_ni_state state;
struct lnet_ni *ni;
int islo;
int i;
/*
* Now wait for the NIs I just nuked to show up on the zombie
* list and shut them down in guaranteed thread context
*/
i = 2;
while ((ni = list_first_entry_or_null(zombie_list,
struct lnet_ni,
ni_netlist)) != NULL) {
int *ref;
int j;
list_del_init(&ni->ni_netlist);
lnet_ni_lock(ni);
state = ni->ni_state;
lnet_ni_unlock(ni);
/* the ni should be in deleting state. If it's not it's a bug */
LASSERT(state == LNET_NI_STATE_DELETING);
cfs_percpt_for_each(ref, j, ni->ni_refs) {
if (*ref == 0)
continue;
/* still busy, add it back to zombie list */
list_add(&ni->ni_netlist, zombie_list);
break;
}
if (!list_empty(&ni->ni_netlist)) {
/* Unlock mutex while waiting to allow other
* threads to read the LNet state and fall through
* to avoid deadlock
*/
lnet_net_unlock(LNET_LOCK_EX);
mutex_unlock(&the_lnet.ln_api_mutex);
++i;
if ((i & (-i)) == i) {
CDEBUG(D_WARNING,
"Waiting for zombie LNI %s\n",
libcfs_nidstr(&ni->ni_nid));
}
schedule_timeout_uninterruptible(cfs_time_seconds(1));
mutex_lock(&the_lnet.ln_api_mutex);
lnet_net_lock(LNET_LOCK_EX);
continue;
}
lnet_net_unlock(LNET_LOCK_EX);
islo = ni->ni_net->net_lnd->lnd_type == LOLND;
LASSERT(!in_interrupt());
/* Holding the LND mutex makes it safe for lnd_shutdown
* to call module_put(). Module unload cannot finish
* until lnet_unregister_lnd() completes, and that
* requires the LND mutex.
*/
mutex_unlock(&the_lnet.ln_api_mutex);
mutex_lock(&the_lnet.ln_lnd_mutex);
(net->net_lnd->lnd_shutdown)(ni);
mutex_unlock(&the_lnet.ln_lnd_mutex);
mutex_lock(&the_lnet.ln_api_mutex);
if (!islo)
CDEBUG(D_LNI, "Removed LNI %s\n",
libcfs_nidstr(&ni->ni_nid));
lnet_ni_free(ni);
i = 2;
lnet_net_lock(LNET_LOCK_EX);
}
}
/* shutdown down the NI and release refcount */
static void
lnet_shutdown_lndni(struct lnet_ni *ni)
{
int i;
struct lnet_net *net = ni->ni_net;
lnet_net_lock(LNET_LOCK_EX);
lnet_ni_lock(ni);
ni->ni_state = LNET_NI_STATE_DELETING;
lnet_ni_unlock(ni);
lnet_ni_unlink_locked(ni);
lnet_incr_dlc_seq();
lnet_net_unlock(LNET_LOCK_EX);
/* clear messages for this NI on the lazy portal */
for (i = 0; i < the_lnet.ln_nportals; i++)
lnet_clear_lazy_portal(ni, i, "Shutting down NI");
lnet_net_lock(LNET_LOCK_EX);
lnet_clear_zombies_nis_locked(net);
lnet_net_unlock(LNET_LOCK_EX);
}
static void
lnet_shutdown_lndnet(struct lnet_net *net)
{
struct lnet_ni *ni;
lnet_net_lock(LNET_LOCK_EX);
list_del_init(&net->net_list);
while ((ni = list_first_entry_or_null(&net->net_ni_list,
struct lnet_ni,
ni_netlist)) != NULL) {
lnet_net_unlock(LNET_LOCK_EX);
lnet_shutdown_lndni(ni);
lnet_net_lock(LNET_LOCK_EX);
}
lnet_net_unlock(LNET_LOCK_EX);
/* Do peer table cleanup for this net */
lnet_peer_tables_cleanup(net);
lnet_net_free(net);
}
static void
lnet_shutdown_lndnets(void)
{
struct lnet_net *net;
LIST_HEAD(resend);
struct lnet_msg *msg, *tmp;
/* NB called holding the global mutex */
/* All quiet on the API front */
LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING ||
the_lnet.ln_state == LNET_STATE_STOPPING);
LASSERT(the_lnet.ln_refcount == 0);
lnet_net_lock(LNET_LOCK_EX);
the_lnet.ln_state = LNET_STATE_STOPPING;
/*
* move the nets to the zombie list to avoid them being
* picked up for new work. LONET is also included in the
* Nets that will be moved to the zombie list
*/
list_splice_init(&the_lnet.ln_nets, &the_lnet.ln_net_zombie);
/* Drop the cached loopback Net. */
if (the_lnet.ln_loni != NULL) {
lnet_ni_decref_locked(the_lnet.ln_loni, 0);
the_lnet.ln_loni = NULL;
}
lnet_net_unlock(LNET_LOCK_EX);
/* iterate through the net zombie list and delete each net */
while ((net = list_first_entry_or_null(&the_lnet.ln_net_zombie,
struct lnet_net,
net_list)) != NULL)
lnet_shutdown_lndnet(net);
spin_lock(&the_lnet.ln_msg_resend_lock);
list_splice(&the_lnet.ln_msg_resend, &resend);
spin_unlock(&the_lnet.ln_msg_resend_lock);
list_for_each_entry_safe(msg, tmp, &resend, msg_list) {
list_del_init(&msg->msg_list);
msg->msg_no_resend = true;
lnet_finalize(msg, -ECANCELED);
}
lnet_net_lock(LNET_LOCK_EX);
the_lnet.ln_state = LNET_STATE_SHUTDOWN;
lnet_net_unlock(LNET_LOCK_EX);
}
static int
lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
{
int rc = -EINVAL;
struct lnet_tx_queue *tq;
int i;
struct lnet_net *net = ni->ni_net;
int cur = atomic_read(&the_lnet.ln_ni_total);
int maxn = READ_ONCE(lnet_interfaces_max);
/* take into account lo */
if (cur >= maxn - 1)
return -ENOSPC;
mutex_lock(&the_lnet.ln_lnd_mutex);
if (tun) {
memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
ni->ni_lnd_tunables_set = true;
}
rc = (net->net_lnd->lnd_startup)(ni);
mutex_unlock(&the_lnet.ln_lnd_mutex);
if (rc != 0) {
LCONSOLE_ERROR("Error %d starting up LNI %s\n",
rc, libcfs_lnd2str(net->net_lnd->lnd_type));
goto failed0;
}
lnet_net_lock(0);
if (lnet_nid_to_ni_locked(&ni->ni_nid, 0)) {
lnet_ni_addref_locked(ni, 0);
lnet_net_unlock(0);
return -EEXIST;
}
lnet_net_unlock(0);
/* We keep a reference on the loopback net through the loopback NI */
if (net->net_lnd->lnd_type == LOLND) {
lnet_ni_addref(ni);
LASSERT(the_lnet.ln_loni == NULL);
the_lnet.ln_loni = ni;
ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
ni->ni_net->net_tunables.lct_max_tx_credits = 0;
ni->ni_net->net_tunables.lct_peer_timeout = 0;
return 0;
}
if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
LCONSOLE_ERROR("LNI %s has no %scredits\n",
libcfs_lnd2str(net->net_lnd->lnd_type),
ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
"" : "per-peer ");
/* shutdown the NI since if we get here then it must've already
* been started
*/
lnet_shutdown_lndni(ni);
return -EINVAL;
}
cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
tq->tq_credits_min =
tq->tq_credits_max =
tq->tq_credits = lnet_ni_tq_credits(ni);
}
atomic_set(&ni->ni_tx_credits,
lnet_ni_tq_credits(ni) * ni->ni_ncpts);
atomic_set(&ni->ni_healthv, LNET_MAX_HEALTH_VALUE);
/* Nodes with small feet have little entropy. The NID for this
* node gives the most entropy in the low bits.
*/
add_device_randomness(&ni->ni_nid, sizeof(ni->ni_nid));
CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
libcfs_nidstr(&ni->ni_nid),
ni->ni_net->net_tunables.lct_peer_tx_credits,
lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
ni->ni_net->net_tunables.lct_peer_rtr_credits,
ni->ni_net->net_tunables.lct_peer_timeout);
atomic_inc(&the_lnet.ln_ni_total);
return 0;
failed0:
lnet_ni_free(ni);
return rc;
}
static const struct lnet_lnd *lnet_load_lnd(u32 lnd_type)
{
const struct lnet_lnd *lnd;
int rc = 0;
mutex_lock(&the_lnet.ln_lnd_mutex);
lnd = lnet_find_lnd_by_type(lnd_type);
if (!lnd) {
#ifdef HAVE_MODULE_LOADING_SUPPORT
mutex_unlock(&the_lnet.ln_lnd_mutex);
rc = request_module("%s", libcfs_lnd2modname(lnd_type));
mutex_lock(&the_lnet.ln_lnd_mutex);
lnd = lnet_find_lnd_by_type(lnd_type);
if (!lnd) {
CERROR("Can't load LND %s, module %s, rc=%d\n",
libcfs_lnd2str(lnd_type),
libcfs_lnd2modname(lnd_type), rc);
if (rc >= 0)
rc = -EINVAL;
lnd = ERR_PTR(rc);
}
#else
LCONSOLE_ERROR("Your kernel must be compiled with kernel module loading support.");
lnd = ERR_PTR(-EINVAL);
#endif
}
mutex_unlock(&the_lnet.ln_lnd_mutex);
return lnd;
}
static int
lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
{
struct lnet_ni *ni;
struct lnet_net *net_l = NULL;
LIST_HEAD(local_ni_list);
int rc;
int ni_count = 0;
__u32 lnd_type;
const struct lnet_lnd *lnd;
int peer_timeout =
net->net_tunables.lct_peer_timeout;
int maxtxcredits =
net->net_tunables.lct_max_tx_credits;
int peerrtrcredits =
net->net_tunables.lct_peer_rtr_credits;
/*
* make sure that this net is unique. If it isn't then
* we are adding interfaces to an already existing network, and
* 'net' is just a convenient way to pass in the list.
* if it is unique we need to find the LND and load it if
* necessary.
*/
if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
lnd_type = LNET_NETTYP(net->net_id);
lnd = lnet_load_lnd(lnd_type);
if (IS_ERR(lnd)) {
rc = PTR_ERR(lnd);
goto failed0;
}
mutex_lock(&the_lnet.ln_lnd_mutex);
net->net_lnd = lnd;
mutex_unlock(&the_lnet.ln_lnd_mutex);
net_l = net;
}
/*
* net_l: if the network being added is unique then net_l
* will point to that network
* if the network being added is not unique then
* net_l points to the existing network.
*
* When we enter the loop below, we'll pick NIs off he
* network beign added and start them up, then add them to
* a local ni list. Once we've successfully started all
* the NIs then we join the local NI list (of started up
* networks) with the net_l->net_ni_list, which should
* point to the correct network to add the new ni list to
*
* If any of the new NIs fail to start up, then we want to
* iterate through the local ni list, which should include
* any NIs which were successfully started up, and shut
* them down.
*
* After than we want to delete the network being added,
* to avoid a memory leak.
*/
while ((ni = list_first_entry_or_null(&net->net_ni_added,
struct lnet_ni,
ni_netlist)) != NULL) {
list_del_init(&ni->ni_netlist);
/* make sure that the the NI we're about to start
* up is actually unique. if it's not fail. */
if (ni->ni_interface &&
!lnet_ni_unique_net(&net_l->net_ni_list,
ni->ni_interface)) {
rc = -EEXIST;
/* In case of not unique net. Simply return with
* errno code and the cleanup will happen under
* lnet_dyn_add_ni()
*/
return rc;
}
/* adjust the pointer the parent network, just in case it
* the net is a duplicate */
ni->ni_net = net_l;
rc = lnet_startup_lndni(ni, tun);
if (rc == -EEXIST)
list_add_tail(&ni->ni_netlist, &local_ni_list);
if (rc != 0)
goto failed1;
lnet_ni_addref(ni);
list_add_tail(&ni->ni_netlist, &local_ni_list);
ni_count++;
}
lnet_net_lock(LNET_LOCK_EX);
list_splice_tail(&local_ni_list, &net_l->net_ni_list);
lnet_incr_dlc_seq();
list_for_each_entry(ni, &net_l->net_ni_list, ni_netlist) {
if (!ni)
break;
lnet_ni_lock(ni);
ni->ni_state = LNET_NI_STATE_ACTIVE;
lnet_ni_unlock(ni);
}
lnet_net_unlock(LNET_LOCK_EX);
/* if the network is not unique then we don't want to keep
* it around after we're done. Free it. Otherwise add that
* net to the global the_lnet.ln_nets */
if (net_l != net) {
/*
* TODO - note. currently the tunables can not be updated
* once added
*/
if (memcmp(&net_l->net_tunables, &net->net_tunables, sizeof(net->net_tunables)))
CWARN("All tunables of NIs of a net should be the same\n");
lnet_net_free(net);
} else {
/*
* restore tunables after it has been overwritten by the
* lnd
*/
if (peer_timeout != -1)
net->net_tunables.lct_peer_timeout = peer_timeout;
if (maxtxcredits != -1)
net->net_tunables.lct_max_tx_credits = maxtxcredits;
if (peerrtrcredits != -1)
net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
lnet_net_lock(LNET_LOCK_EX);
list_add_tail(&net->net_list, &the_lnet.ln_nets);
lnet_net_unlock(LNET_LOCK_EX);
}
return ni_count;
failed1:
/*
* shutdown the new NIs that are being started up
* free the NET being started
*/
while ((ni = list_first_entry_or_null(&local_ni_list,
struct lnet_ni,
ni_netlist)) != NULL)
lnet_shutdown_lndni(ni);
failed0:
lnet_net_free(net);
return rc;
}
static int
lnet_startup_lndnets(struct list_head *netlist)
{
struct lnet_net *net;
int rc;
int ni_count = 0;
/*
* Change to running state before bringing up the LNDs. This
* allows lnet_shutdown_lndnets() to assert that we've passed
* through here.
*/
lnet_net_lock(LNET_LOCK_EX);
the_lnet.ln_state = LNET_STATE_RUNNING;
lnet_net_unlock(LNET_LOCK_EX);
while ((net = list_first_entry_or_null(netlist,
struct lnet_net,
net_list)) != NULL) {
list_del_init(&net->net_list);
rc = lnet_startup_lndnet(net, NULL);
if (rc < 0)
goto failed;
ni_count += rc;
}
return ni_count;
failed:
lnet_shutdown_lndnets();
return rc;
}
static int lnet_genl_parse_list(struct sk_buff *msg,
const struct ln_key_list *data[], u16 idx)
{
const struct ln_key_list *list = data[idx];
const struct ln_key_props *props;
struct nlattr *node;
u16 count;
if (!list)
return 0;
if (!list->lkl_maxattr)
return -ERANGE;
props = list->lkl_list;
if (!props)
return -EINVAL;
node = nla_nest_start(msg, LN_SCALAR_ATTR_LIST);
if (!node)
return -ENOBUFS;
for (count = 1; count <= list->lkl_maxattr; count++) {
struct nlattr *key = nla_nest_start(msg, count);
int end, start = msg->len;
if (!key)
return -EMSGSIZE;
if (count == 1)
nla_put_u16(msg, LN_SCALAR_ATTR_LIST_SIZE,
list->lkl_maxattr);
nla_put_u16(msg, LN_SCALAR_ATTR_INDEX, count);
if (props[count].lkp_value)
nla_put_string(msg, LN_SCALAR_ATTR_VALUE,
props[count].lkp_value);
if (props[count].lkp_key_format)
nla_put_u16(msg, LN_SCALAR_ATTR_KEY_FORMAT,
props[count].lkp_key_format);
nla_put_u16(msg, LN_SCALAR_ATTR_NLA_TYPE,
props[count].lkp_data_type);
if (props[count].lkp_data_type == NLA_NESTED) {
int rc;
rc = lnet_genl_parse_list(msg, data, ++idx);
if (rc < 0)
return rc;
idx = rc;
}
end = nla_nest_end(msg, key);
CDEBUG(D_INFO, "nest attr[%d] length = %d\n", count, end - start);
}
nla_nest_end(msg, node);
return idx;
}
int lnet_genl_send_scalar_list(struct sk_buff *msg, u32 portid, u32 seq,
const struct genl_family *family, int flags,
u8 cmd, const struct ln_key_list *data[])
{
int rc = 0;
void *hdr;
if (!data[0])
return -EINVAL;
hdr = genlmsg_put(msg, portid, seq, family, flags, cmd);
if (!hdr)
GOTO(canceled, rc = -EMSGSIZE);
rc = lnet_genl_parse_list(msg, data, 0);
if (rc < 0)
GOTO(canceled, rc);
genlmsg_end(msg, hdr);
canceled:
if (rc < 0)
genlmsg_cancel(msg, hdr);
return rc > 0 ? 0 : rc;
}
EXPORT_SYMBOL(lnet_genl_send_scalar_list);
static int
nla_extract_val(struct nlattr **attr, int *rem,
enum lnet_nl_scalar_attrs attr_type,
void *ret, int ret_size,
struct netlink_ext_ack *extack)
{
int rc = -EINVAL;
ENTRY;
*attr = nla_next(*attr, rem);
if (nla_type(*attr) != attr_type) {
CDEBUG(D_NET, "nla_type %d expect %d\n", nla_type(*attr),
attr_type);
NL_SET_ERR_MSG(extack, "Invalid type for attribute");
RETURN(rc);
}
switch (attr_type) {
case LN_SCALAR_ATTR_VALUE:
rc = nla_strscpy(ret, *attr, ret_size);
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"Failed to extract value from string attribute");
} else {
rc = 0;
}
break;
case LN_SCALAR_ATTR_INT_VALUE:
if (ret_size == sizeof(u64)) {
*(u64 *)ret = nla_get_s64(*attr);
rc = 0;
}
break;
default:
NL_SET_ERR_MSG(extack, "Unrecognized attribute type");
ret = NULL;
break;
}
RETURN(rc);
}
static int
nla_strnid(struct nlattr **attr, struct lnet_nid *nid, int *rem,
struct netlink_ext_ack *extack)
{
char nidstr[LNET_NIDSTR_SIZE];
int rc;
ENTRY;
rc = nla_extract_val(attr, rem, LN_SCALAR_ATTR_VALUE,
nidstr, sizeof(nidstr), extack);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to copy nidstring attribute");
RETURN(rc);
}
rc = libcfs_strnid(nid, strim(nidstr));
if (rc < 0) {
CDEBUG(D_NET, "Invalid nidstr \"%s\"\n", nidstr);
NL_SET_ERR_MSG(extack, "failed to convert nidstring to NID");
RETURN(rc);
}
CDEBUG(D_NET, "%s -> %s\n", nidstr, libcfs_nidstr(nid));
RETURN(0);
}
static struct genl_family lnet_family;
/**
* lnet_lib_init() - Initialize LNet library.
*
* Automatically called at module loading time. Caller has to call
* lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
* latter returned 0. It must be called exactly once.
*
* Return:
* * %0 on success
* * %negative on failures.
*/
int lnet_lib_init(void)
{
int rc;
lnet_assert_wire_constants();
/* refer to global cfs_cpt_table for now */
the_lnet.ln_cpt_table = cfs_cpt_tab;
the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_tab);
LASSERT(the_lnet.ln_cpt_number > 0);
if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
/* we are under risk of consuming all lh_cookie */
CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
"please change setting of CPT-table and retry\n",
the_lnet.ln_cpt_number, LNET_CPT_MAX);
return -E2BIG;
}
while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
the_lnet.ln_cpt_bits++;
rc = lnet_create_locks();
if (rc != 0) {
CERROR("Can't create LNet global locks: %d\n", rc);
return rc;
}
rc = genl_register_family(&lnet_family);
if (rc != 0) {
lnet_destroy_locks();
CERROR("Can't register LNet netlink family: %d\n", rc);
return rc;
}
the_lnet.ln_refcount = 0;
INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
INIT_LIST_HEAD(&the_lnet.ln_msg_resend);
INIT_LIST_HEAD(&the_lnet.ln_nid_update_callbacks);
/* The hash table size is the number of bits it takes to express the set
* ln_num_routes, minus 1 (better to under estimate than over so we
* don't waste memory). */
if (rnet_htable_size <= 0)
rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
the_lnet.ln_remote_nets_hbits = max_t(int, 1,
order_base_2(rnet_htable_size) - 1);
/* All LNDs apart from the LOLND are in separate modules. They
* register themselves when their module loads, and unregister
* themselves when their module is unloaded. */
lnet_register_lnd(&the_lolnd);
return 0;
}
/**
* lnet_lib_exit() - Finalize LNet library.
*
* pre: lnet_lib_init() called with success.
* pre: All LNet users called LNetNIFini() for matching LNetNIInit() calls.
*
* As this happens at module-unload, all lnds must already be unloaded,
* so they must already be unregistered.
*/
void lnet_lib_exit(void)
{
int i;
LASSERT(the_lnet.ln_refcount == 0);
lnet_unregister_lnd(&the_lolnd);
for (i = 0; i < NUM_LNDS; i++)
LASSERT(!the_lnet.ln_lnds[i]);
lnet_destroy_locks();
LASSERT(list_empty(&the_lnet.ln_nid_update_callbacks));
genl_unregister_family(&lnet_family);
}
/**
* LNetNIInit() - Set LNet PID and start LNet interfaces, routing & forwarding.
* @requested_pid: PID requested by the caller.
*
* Users must call this function at least once before any other functions.
* For each successful call there must be a corresponding call to
* LNetNIFini(). For subsequent calls to LNetNIInit(), @requested_pid is
* ignored.
*
* The PID used by LNet may be different from the one requested.
* See LNetGetId().
*
* Return %>=0 on success, and %<0 error code on failures.
*/
int
LNetNIInit(lnet_pid_t requested_pid)
{
int rc;
int ni_bytes;
struct lnet_ping_buffer *pbuf;
struct lnet_handle_md ping_mdh;
LIST_HEAD(net_head);
struct lnet_net *net;
mutex_lock(&the_lnet.ln_api_mutex);
CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
if (the_lnet.ln_state == LNET_STATE_STOPPING) {
mutex_unlock(&the_lnet.ln_api_mutex);
return -ESHUTDOWN;
}
if (the_lnet.ln_refcount > 0) {
rc = the_lnet.ln_refcount++;
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
rc = lnet_prepare(requested_pid);
if (rc != 0) {
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
/* create a network for Loopback network */
net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
if (net == NULL) {
rc = -ENOMEM;
goto err_empty_list;
}
/* Add in the loopback NI */
if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
rc = -ENOMEM;
goto err_empty_list;
}
if (use_tcp_bonding)
CWARN("use_tcp_bonding has been removed. Use Multi-Rail and Dynamic Discovery instead, see LU-13641\n");
/* If LNet is being initialized via DLC it is possible
* that the user requests not to load module parameters (ones which
* are supported by DLC) on initialization. Therefore, make sure not
* to load networks, routes and forwarding from module parameters
* in this case. On cleanup in case of failure only clean up
* routes if it has been loaded */
if (!the_lnet.ln_nis_from_mod_params) {
rc = lnet_parse_networks(&net_head, lnet_get_networks());
if (rc < 0)
goto err_empty_list;
}
rc = lnet_startup_lndnets(&net_head);
if (rc < 0)
goto err_empty_list;
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 17, 53, 0)
if (!the_lnet.ln_nis_from_mod_params) {
int im_a_router = 0;
rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
if (rc != 0)
goto err_shutdown_lndnis;
rc = lnet_rtrpools_alloc(im_a_router);
if (rc != 0)
goto err_destroy_routes;
if (the_lnet.ln_routing == LNET_ROUTING_ENABLED)
LCONSOLE_INFO("Message forwarding enabled\n");
}
#endif
rc = lnet_acceptor_start();
if (rc != 0)
goto err_destroy_routes;
the_lnet.ln_refcount = 1;
/* Now I may use my own API functions... */
ni_bytes = LNET_PING_INFO_HDR_SIZE;
list_for_each_entry(net, &the_lnet.ln_nets, net_list)
ni_bytes += lnet_get_net_ni_bytes_locked(net);
rc = lnet_ping_target_setup(&pbuf, &ping_mdh, ni_bytes, true);
if (rc != 0)
goto err_acceptor_stop;
lnet_ping_target_update(pbuf, ping_mdh);
the_lnet.ln_mt_handler = lnet_mt_event_handler;
rc = lnet_push_target_init();
if (rc != 0)
goto err_stop_ping;
rc = lnet_monitor_thr_start();
if (rc != 0)
goto err_destroy_push_target;
rc = lnet_peer_discovery_start();
if (rc != 0)
goto err_stop_monitor_thr;
lnet_fault_init();
lnet_router_debugfs_init();
mutex_unlock(&the_lnet.ln_api_mutex);
complete_all(&the_lnet.ln_started);
/* wait for all routers to start */
lnet_wait_router_start();
return 0;
err_stop_monitor_thr:
lnet_monitor_thr_stop();
err_destroy_push_target:
lnet_push_target_fini();
err_stop_ping:
lnet_ping_target_fini();
err_acceptor_stop:
the_lnet.ln_refcount = 0;
lnet_acceptor_stop();
err_destroy_routes:
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 17, 53, 0)
if (!the_lnet.ln_nis_from_mod_params)
lnet_destroy_routes();
err_shutdown_lndnis:
#endif
lnet_shutdown_lndnets();
err_empty_list:
lnet_unprepare();
LASSERT(rc < 0);
mutex_unlock(&the_lnet.ln_api_mutex);
while ((net = list_first_entry_or_null(&net_head,
struct lnet_net,
net_list)) != NULL) {
list_del_init(&net->net_list);
lnet_net_free(net);
}
return rc;
}
EXPORT_SYMBOL(LNetNIInit);
/**
* LNetNIFini() - Stop LNet interfaces, routing, and forwarding.
*
* Users must call this function once for each successful call to LNetNIInit().
* Once the LNetNIFini() operation has been started, the results of pending
* API operations are undefined.
*
* Returns always %0 for current implementation.
*/
int
LNetNIFini(void)
{
mutex_lock(&the_lnet.ln_api_mutex);
LASSERT(the_lnet.ln_refcount > 0);
if (the_lnet.ln_refcount != 1) {
the_lnet.ln_refcount--;
} else {
lnet_handler_t dc_handler = the_lnet.ln_dc_handler;
LASSERT(!the_lnet.ln_niinit_self);
lnet_net_lock(LNET_LOCK_EX);
the_lnet.ln_state = LNET_STATE_STOPPING;
lnet_net_unlock(LNET_LOCK_EX);
lnet_fault_fini();
lnet_router_debugfs_fini();
lnet_peer_discovery_stop();
lnet_monitor_thr_stop();
lnet_assert_handler_unused(dc_handler);
lnet_push_target_fini();
lnet_ping_target_fini();
/* Teardown fns that use my own API functions BEFORE here */
the_lnet.ln_refcount = 0;
lnet_acceptor_stop();
lnet_destroy_routes();
lnet_shutdown_lndnets();
lnet_unprepare();
}
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
EXPORT_SYMBOL(LNetNIFini);
int LNetRegisterNIDUpdates(int (*nid_update_cb)(void *private,
struct nid_update_info *nui),
void *cb_data)
{
bool found = false;
struct nid_update_callback_reg *tmp;
mutex_lock(&the_lnet.ln_api_mutex);
list_for_each_entry(tmp, &the_lnet.ln_nid_update_callbacks, nur_list) {
if (tmp->nur_data == cb_data) {
tmp->nur_cb = nid_update_cb;
found = true;
break;
}
}
if (!found) {
struct nid_update_callback_reg *nur;
LIBCFS_ALLOC(nur, sizeof(*nur));
if (!nur) {
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOMEM;
}
nur->nur_cb = nid_update_cb;
nur->nur_data = cb_data;
list_add_tail(&nur->nur_list,
&the_lnet.ln_nid_update_callbacks);
}
mutex_unlock(&the_lnet.ln_api_mutex);
CDEBUG(D_NET, "Registering %p/%p party for NID updates\n",
nid_update_cb, cb_data);
return 0;
}
EXPORT_SYMBOL(LNetRegisterNIDUpdates);
/* use the function pointer as the key */
void LNetUnRegisterNIDUpdates(void *cb_data)
{
struct nid_update_callback_reg *nur, *tmp, *delnur = NULL;
mutex_lock(&the_lnet.ln_api_mutex);
list_for_each_entry_safe(nur, tmp, &the_lnet.ln_nid_update_callbacks,
nur_list) {
if (nur->nur_data == cb_data) {
list_del(&nur->nur_list);
delnur = nur;
break;
}
}
mutex_unlock(&the_lnet.ln_api_mutex);
LIBCFS_FREE(delnur, sizeof(*delnur));
CDEBUG(D_NET, "UnRegistering %p party for NID updates\n",
cb_data);
}
EXPORT_SYMBOL(LNetUnRegisterNIDUpdates);
/**
* lnet_fill_ni_info() - Grabs the ni data from the ni structure and fills the
* out parameters
* @ni: network interface structure
* @cfg_ni: NI config information [out]
* @tun: network and LND tunables [out]
* @stats: If %true collect stats via ioctl interfaces
* @tun_size: Size of tunables (version/size checking)
*/
static void
lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
struct lnet_ioctl_config_lnd_tunables *tun,
struct lnet_ioctl_element_stats *stats,
__u32 tun_size)
{
const struct lnet_lnd *net_lnd;
size_t min_size = 0;
int i;
if (!ni || !cfg_ni || !tun || !nid_is_nid4(&ni->ni_nid))
return;
if (ni->ni_interface != NULL) {
i = strscpy(cfg_ni->lic_ni_intf, ni->ni_interface,
sizeof(cfg_ni->lic_ni_intf));
if (i < 0) {
CDEBUG(D_NET, "%s too long for dest buffer: rc = %d\n",
ni->ni_interface, i);
return;
}
}
cfg_ni->lic_nid = lnet_nid_to_nid4(&ni->ni_nid);
cfg_ni->lic_status = lnet_ni_get_status_locked(ni);
cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
if (stats) {
stats->iel_send_count = lnet_sum_stats(&ni->ni_stats,
LNET_STATS_TYPE_SEND);
stats->iel_recv_count = lnet_sum_stats(&ni->ni_stats,
LNET_STATS_TYPE_RECV);
stats->iel_drop_count = lnet_sum_stats(&ni->ni_stats,
LNET_STATS_TYPE_DROP);
}
/* Update the tunables timeout value from the dynamic timeout API */
net_lnd = ni->ni_net->net_lnd;
switch (net_lnd->lnd_type) {
case SOCKLND:
ni->ni_lnd_tunables.lnd_tun_u.lnd_sock.lnd_timeout =
net_lnd->lnd_get_timeout();
break;
case O2IBLND:
ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib.lnd_timeout =
net_lnd->lnd_get_timeout();
break;
case KFILND:
ni->ni_lnd_tunables.lnd_tun_u.lnd_kfi.lnd_timeout =
net_lnd->lnd_get_timeout();
break;
case GNILND:
ni->ni_lnd_tunables.lnd_tun_u.lnd_gni.lnd_timeout =
net_lnd->lnd_get_timeout();
}
/*
* tun->lt_tun will always be present, but in order to be
* backwards compatible, we need to deal with the cases when
* tun->lt_tun is smaller than what the kernel has, because it
* comes from an older version of a userspace program, then we'll
* need to copy as much information as we have available space.
*/
min_size = tun_size - sizeof(tun->lt_cmn);
memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
/* copy over the cpts */
if (ni->ni_ncpts == LNET_CPT_NUMBER &&
ni->ni_cpts == NULL) {
for (i = 0; i < ni->ni_ncpts; i++)
cfg_ni->lic_cpts[i] = i;
} else {
for (i = 0;
ni->ni_cpts != NULL && i < ni->ni_ncpts &&
i < LNET_MAX_SHOW_NUM_CPT;
i++)
cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
}
cfg_ni->lic_ncpts = ni->ni_ncpts;
}
/**
* lnet_fill_ni_info_legacy() - Grabs the ni data from the ni structure and
* fills the out parameters
* @ni: network interface structure
* @config: config information [out]
*
* NOTE: This is a legacy function left in the code to be backwards
* compatible with older userspace programs. It should eventually be
* removed.
*/
static void
lnet_fill_ni_info_legacy(struct lnet_ni *ni,
struct lnet_ioctl_config_data *config)
{
struct lnet_ioctl_net_config *net_config;
struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
size_t min_size, tunable_size = 0;
ssize_t rc;
int i;
if (!ni || !config || !nid_is_nid4(&ni->ni_nid))
return;
net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
if (!net_config)
return;
if (!ni->ni_interface)
return;
rc = strscpy(net_config->ni_interface, ni->ni_interface,
sizeof(net_config->ni_interface));
if (rc < 0) {
CDEBUG(D_NET, "%s too long for dest buffer: rc = %zd\n",
ni->ni_interface, rc);
return;
}
config->cfg_nid = lnet_nid_to_nid4(&ni->ni_nid);
config->cfg_config_u.cfg_net.net_peer_timeout =
ni->ni_net->net_tunables.lct_peer_timeout;
config->cfg_config_u.cfg_net.net_max_tx_credits =
ni->ni_net->net_tunables.lct_max_tx_credits;
config->cfg_config_u.cfg_net.net_peer_tx_credits =
ni->ni_net->net_tunables.lct_peer_tx_credits;
config->cfg_config_u.cfg_net.net_peer_rtr_credits =
ni->ni_net->net_tunables.lct_peer_rtr_credits;
net_config->ni_status = lnet_ni_get_status_locked(ni);
if (ni->ni_cpts) {
int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
for (i = 0; i < num_cpts; i++)
net_config->ni_cpts[i] = ni->ni_cpts[i];
config->cfg_ncpts = num_cpts;
}
/*
* See if user land tools sent in a newer and larger version
* of struct lnet_tunables than what the kernel uses.
*/
min_size = sizeof(*config) + sizeof(*net_config);
if (config->cfg_hdr.ioc_len > min_size)
tunable_size = config->cfg_hdr.ioc_len - min_size;
/* Don't copy too much data to user space */
min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
if (lnd_cfg && min_size) {
memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
config->cfg_config_u.cfg_net.net_interface_count = 1;
/* Tell user land that kernel side has less data */
if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
config->cfg_hdr.ioc_len -= min_size;
}
}
}
struct lnet_ni *
lnet_get_ni_idx_locked(int idx)
{
struct lnet_ni *ni;
struct lnet_net *net;
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (idx-- == 0)
return ni;
}
}
return NULL;
}
int lnet_get_net_healthv_locked(struct lnet_net *net)
{
struct lnet_ni *ni;
int best_healthv = 0;
int healthv, ni_fatal;
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
healthv = atomic_read(&ni->ni_healthv);
ni_fatal = atomic_read(&ni->ni_fatal_error_on);
if (!ni_fatal && healthv > best_healthv)
best_healthv = healthv;
}
return best_healthv;
}
struct lnet_ni *
lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
{
struct lnet_ni *ni;
struct lnet_net *net = mynet;
/*
* It is possible that the net has been cleaned out while there is
* a message being sent. This function accessed the net without
* checking if the list is empty
*/
if (!prev) {
if (!net)
net = list_first_entry(&the_lnet.ln_nets,
struct lnet_net,
net_list);
if (list_empty(&net->net_ni_list))
return NULL;
ni = list_first_entry(&net->net_ni_list, struct lnet_ni,
ni_netlist);
return ni;
}
if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
/* if you reached the end of the ni list and the net is
* specified, then there are no more nis in that net */
if (net != NULL)
return NULL;
/* we reached the end of this net ni list. move to the
* next net */
if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
/* no more nets and no more NIs. */
return NULL;
/* get the next net */
net = list_first_entry(&prev->ni_net->net_list, struct lnet_net,
net_list);
if (list_empty(&net->net_ni_list))
return NULL;
/* get the ni on it */
ni = list_first_entry(&net->net_ni_list, struct lnet_ni,
ni_netlist);
return ni;
}
if (list_empty(&prev->ni_netlist))
return NULL;
/* there are more nis left */
ni = list_first_entry(&prev->ni_netlist, struct lnet_ni, ni_netlist);
return ni;
}
static int
lnet_get_net_config(struct lnet_ioctl_config_data *config)
{
struct lnet_ni *ni;
int cpt;
int rc = -ENOENT;
int idx = config->cfg_count;
cpt = lnet_net_lock_current();
ni = lnet_get_ni_idx_locked(idx);
if (ni != NULL) {
rc = 0;
lnet_ni_lock(ni);
lnet_fill_ni_info_legacy(ni, config);
lnet_ni_unlock(ni);
}
lnet_net_unlock(cpt);
return rc;
}
static int
lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
struct lnet_ioctl_config_lnd_tunables *tun,
struct lnet_ioctl_element_stats *stats,
__u32 tun_size)
{
struct lnet_ni *ni;
int cpt;
int rc = -ENOENT;
if (!cfg_ni || !tun || !stats)
return -EINVAL;
cpt = lnet_net_lock_current();
ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
if (ni) {
rc = 0;
lnet_ni_lock(ni);
lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
lnet_ni_unlock(ni);
}
lnet_net_unlock(cpt);
return rc;
}
static int lnet_get_ni_stats(struct lnet_ioctl_element_msg_stats *msg_stats)
{
struct lnet_ni *ni;
int rc = -ENOENT;
if (!msg_stats)
return -EINVAL;
ni = lnet_get_ni_idx_locked(msg_stats->im_idx);
if (ni) {
lnet_usr_translate_stats(msg_stats, &ni->ni_stats);
rc = 0;
}
return rc;
}
/* called with api_mutex locked */
static void lnet_notify_net_update(struct lnet_net *net, bool delete)
{
struct nid_update_info nui;
struct nid_update_callback_reg *nur;
struct lnet_ni *ni;
struct lnet_nid *pnid;
unsigned int i = 0;
if (list_empty(&the_lnet.ln_nid_update_callbacks))
return;
nui.nui_net = net->net_id;
nui.nui_count = 0;
if (delete) {
CDEBUG(D_NET, "Notify about deletion of net #%u\n",
net->net_id);
list_for_each_entry(nur, &the_lnet.ln_nid_update_callbacks,
nur_list)
nur->nur_cb(nur->nur_data, &nui);
return;
}
genradix_init(&nui.nui_rdx);
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (nid_is_lo0(&ni->ni_nid))
continue;
pnid = genradix_ptr_alloc(&nui.nui_rdx, i, GFP_KERNEL);
if (!pnid) {
CWARN("can't allocate memory for %d NIDs\n", i);
break;
}
*pnid = ni->ni_nid;
i++;
}
if (i > 0) {
CDEBUG(D_NET, "Notify about %d local NIDs at net #%d\n",
i, net->net_id);
nui.nui_count = i;
list_for_each_entry(nur, &the_lnet.ln_nid_update_callbacks,
nur_list)
nur->nur_cb(nur->nur_data, &nui);
} else {
CDEBUG(D_NET, "no local nids found\n");
}
genradix_free(&nui.nui_rdx);
}
static int lnet_add_net_common(struct lnet_net *net,
struct lnet_ioctl_config_lnd_tunables *tun)
{
struct lnet_handle_md ping_mdh;
struct lnet_ping_buffer *pbuf;
struct lnet_remotenet *rnet;
struct lnet_ni *ni;
u32 net_id;
int rc;
lnet_net_lock(LNET_LOCK_EX);
rnet = lnet_find_rnet_locked(net->net_id);
lnet_net_unlock(LNET_LOCK_EX);
/*
* make sure that the net added doesn't invalidate the current
* configuration LNet is keeping
*/
if (rnet) {
CERROR("Adding net %s will invalidate routing configuration\n",
libcfs_net2str(net->net_id));
lnet_net_free(net);
return -EUSERS;
}
if (tun)
memcpy(&net->net_tunables,
&tun->lt_cmn, sizeof(net->net_tunables));
else
memset(&net->net_tunables, -1, sizeof(net->net_tunables));
net_id = net->net_id;
rc = lnet_startup_lndnet(net,
(tun) ? &tun->lt_tun : NULL);
if (rc < 0)
return rc;
/* make sure you calculate the correct number of slots in the ping
* buffer. Since the ping info is a flattened list of all the NIs,
* we should allocate enough slots to accomodate the number of NIs
* which will be added.
*/
rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
LNET_PING_INFO_HDR_SIZE +
lnet_get_ni_bytes(),
false);
if (rc < 0) {
lnet_shutdown_lndnet(net);
return rc;
}
lnet_net_lock(LNET_LOCK_EX);
net = lnet_get_net_locked(net_id);
LASSERT(net);
/* apply the UDSPs */
rc = lnet_udsp_apply_policies_on_net(net);
if (rc)
CERROR("Failed to apply UDSPs on local net %s\n",
libcfs_net2str(net->net_id));
/* At this point we lost track of which NI was just added, so we
* just re-apply the policies on all of the NIs on this net
*/
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
rc = lnet_udsp_apply_policies_on_ni(ni);
if (rc)
CERROR("Failed to apply UDSPs on ni %s\n",
libcfs_nidstr(&ni->ni_nid));
}
lnet_net_unlock(LNET_LOCK_EX);
/*
* Start the acceptor thread if this is the first network
* being added that requires the thread.
*/
if (net->net_lnd->lnd_accept) {
rc = lnet_acceptor_start();
if (rc < 0) {
/* shutdown the net that we just started */
CERROR("Failed to start up acceptor thread\n");
lnet_shutdown_lndnet(net);
goto failed;
}
}
lnet_net_lock(LNET_LOCK_EX);
lnet_peer_net_added(net);
lnet_net_unlock(LNET_LOCK_EX);
lnet_ping_target_update(pbuf, ping_mdh);
/* update interested entities of the NID change */
lnet_notify_net_update(net, false);
return 0;
failed:
lnet_ping_md_unlink(pbuf, &ping_mdh);
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
return rc;
}
static void
lnet_set_tune_defaults(struct lnet_ioctl_config_lnd_tunables *tun)
{
if (tun) {
if (tun->lt_cmn.lct_peer_timeout < 0)
tun->lt_cmn.lct_peer_timeout = DEFAULT_PEER_TIMEOUT;
if (!tun->lt_cmn.lct_peer_tx_credits)
tun->lt_cmn.lct_peer_tx_credits = DEFAULT_PEER_CREDITS;
if (!tun->lt_cmn.lct_max_tx_credits)
tun->lt_cmn.lct_max_tx_credits = DEFAULT_CREDITS;
}
}
static int lnet_handle_legacy_ip2nets(char *ip2nets,
struct lnet_ioctl_config_lnd_tunables *tun)
{
struct lnet_net *net;
const char *nets;
int rc;
LIST_HEAD(net_head);
rc = lnet_parse_ip2nets(&nets, ip2nets);
if (rc < 0)
return rc;
rc = lnet_parse_networks(&net_head, nets);
if (rc < 0)
return rc;
lnet_set_tune_defaults(tun);
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
rc = -ESHUTDOWN;
goto out;
}
while ((net = list_first_entry_or_null(&net_head,
struct lnet_net,
net_list)) != NULL) {
list_del_init(&net->net_list);
rc = lnet_add_net_common(net, tun);
if (rc < 0)
goto out;
}
out:
mutex_unlock(&the_lnet.ln_api_mutex);
while ((net = list_first_entry_or_null(&net_head,
struct lnet_net,
net_list)) != NULL) {
list_del_init(&net->net_list);
lnet_net_free(net);
}
return rc;
}
int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf, u32 net_id,
struct lnet_nid *nid,
struct lnet_ioctl_config_lnd_tunables *tun)
{
struct lnet_net *net;
struct lnet_ni *ni;
int rc, i;
u32 lnd_type;
/* handle legacy ip2nets from DLC */
if (conf->lic_legacy_ip2nets[0] != '\0')
return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
tun);
lnd_type = LNET_NETTYP(net_id);
if (!libcfs_isknown_lnd(lnd_type)) {
CERROR("No valid net and lnd information provided\n");
return -ENOENT;
}
net = lnet_net_alloc(net_id, NULL);
if (!net)
return -ENOMEM;
for (i = 0; i < conf->lic_ncpts; i++) {
if (conf->lic_cpts[i] >= LNET_CPT_NUMBER) {
lnet_net_free(net);
return -ERANGE;
}
}
ni = lnet_ni_alloc_w_cpt_array(net, nid, conf->lic_cpts,
conf->lic_ncpts, conf->lic_ni_intf);
if (!ni) {
lnet_net_free(net);
return -ENOMEM;
}
lnet_set_tune_defaults(tun);
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
lnet_net_free(net);
rc = -ESHUTDOWN;
} else {
rc = lnet_add_net_common(net, tun);
}
mutex_unlock(&the_lnet.ln_api_mutex);
/* If NI already exist delete this new unused copy */
if (rc == -EEXIST) {
lnet_ni_free(ni);
lnet_net_free(net);
}
return rc;
}
int lnet_dyn_del_ni(struct lnet_nid *nid, bool allow_net_del)
{
struct lnet_net *net;
struct lnet_ni *ni;
u32 net_id = LNET_NID_NET(nid);
struct lnet_ping_buffer *pbuf;
struct lnet_handle_md ping_mdh;
int net_bytes, rc;
bool net_empty;
/* don't allow userspace to shutdown the LOLND */
if (LNET_NETTYP(net_id) == LOLND)
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
rc = -ESHUTDOWN;
goto unlock_api_mutex;
}
lnet_net_lock(0);
net = lnet_get_net_locked(net_id);
if (!net) {
CERROR("net %s not found\n",
libcfs_net2str(net_id));
rc = -ENOENT;
goto unlock_net;
}
if (!nid_addr_is_set(nid) && allow_net_del) {
CDEBUG(D_NET, "remove the entire net\n");
net_bytes = lnet_get_net_ni_bytes_locked(net);
lnet_net_unlock(0);
lnet_notify_net_update(net, true);
/* create and link a new ping info, before removing the old one */
rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
LNET_PING_INFO_HDR_SIZE +
lnet_get_ni_bytes() - net_bytes,
false);
if (rc != 0)
goto unlock_api_mutex;
lnet_shutdown_lndnet(net);
lnet_acceptor_stop();
lnet_ping_target_update(pbuf, ping_mdh);
goto unlock_api_mutex;
}
ni = lnet_nid_to_ni_locked(nid, 0);
if (!ni) {
CERROR("nid %s not found\n", libcfs_nidstr(nid));
rc = -ENOENT;
goto unlock_net;
}
net_bytes = lnet_get_net_ni_bytes_locked(net);
net_empty = list_is_singular(&net->net_ni_list);
lnet_net_unlock(0);
lnet_notify_net_update(net, net_empty);
/* create and link a new ping info, before removing the old one */
rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
(LNET_PING_INFO_HDR_SIZE +
lnet_get_ni_bytes() -
lnet_ping_sts_size(&ni->ni_nid)),
false);
if (rc != 0)
goto unlock_api_mutex;
lnet_shutdown_lndni(ni);
lnet_acceptor_stop();
lnet_ping_target_update(pbuf, ping_mdh);
/* check if the net is empty and remove it if it is */
if (net_empty)
lnet_shutdown_lndnet(net);
goto unlock_api_mutex;
unlock_net:
lnet_net_unlock(0);
unlock_api_mutex:
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
/*
* lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
* They are only expected to be called for unique networks.
* That can be as a result of older DLC library
* calls. Multi-Rail DLC and beyond no longer uses these APIs.
*/
int
lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
{
struct lnet_net *net;
LIST_HEAD(net_head);
int rc;
struct lnet_ioctl_config_lnd_tunables tun;
const char *nets = conf->cfg_config_u.cfg_net.net_intf;
/* Create a net/ni structures for the network string */
rc = lnet_parse_networks(&net_head, nets);
if (rc <= 0)
return rc == 0 ? -EINVAL : rc;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
rc = -ESHUTDOWN;
goto out_unlock_clean;
}
if (rc > 1) {
rc = -EINVAL; /* only add one network per call */
goto out_unlock_clean;
}
net = list_first_entry(&net_head, struct lnet_net, net_list);
list_del_init(&net->net_list);
LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
memset(&tun, 0, sizeof(tun));
tun.lt_cmn.lct_peer_timeout =
(!conf->cfg_config_u.cfg_net.net_peer_timeout) ? DEFAULT_PEER_TIMEOUT :
conf->cfg_config_u.cfg_net.net_peer_timeout;
tun.lt_cmn.lct_peer_tx_credits =
(!conf->cfg_config_u.cfg_net.net_peer_tx_credits) ? DEFAULT_PEER_CREDITS :
conf->cfg_config_u.cfg_net.net_peer_tx_credits;
tun.lt_cmn.lct_peer_rtr_credits =
conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
tun.lt_cmn.lct_max_tx_credits =
(!conf->cfg_config_u.cfg_net.net_max_tx_credits) ? DEFAULT_CREDITS :
conf->cfg_config_u.cfg_net.net_max_tx_credits;
rc = lnet_add_net_common(net, &tun);
out_unlock_clean:
mutex_unlock(&the_lnet.ln_api_mutex);
/* net_head list is empty in success case */
while ((net = list_first_entry_or_null(&net_head,
struct lnet_net,
net_list)) != NULL) {
list_del_init(&net->net_list);
lnet_net_free(net);
}
return rc;
}
int
lnet_dyn_del_net(u32 net_id)
{
struct lnet_net *net;
struct lnet_ping_buffer *pbuf;
struct lnet_handle_md ping_mdh;
int net_ni_bytes, rc;
/* don't allow userspace to shutdown the LOLND */
if (LNET_NETTYP(net_id) == LOLND)
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
rc = -ESHUTDOWN;
goto out;
}
lnet_net_lock(0);
net = lnet_get_net_locked(net_id);
if (net == NULL) {
lnet_net_unlock(0);
rc = -EINVAL;
goto out;
}
net_ni_bytes = lnet_get_net_ni_bytes_locked(net);
lnet_net_unlock(0);
lnet_notify_net_update(net, true);
/* create and link a new ping info, before removing the old one */
rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
LNET_PING_INFO_HDR_SIZE +
lnet_get_ni_bytes() - net_ni_bytes,
false);
if (rc != 0)
goto out;
lnet_shutdown_lndnet(net);
lnet_acceptor_stop();
lnet_ping_target_update(pbuf, ping_mdh);
out:
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
void lnet_mark_ping_buffer_for_update(void)
{
if (lnet_routing_enabled())
return;
atomic_set(&the_lnet.ln_update_ping_buf, 1);
complete(&the_lnet.ln_mt_wait_complete);
}
EXPORT_SYMBOL(lnet_mark_ping_buffer_for_update);
static void lnet_update_ping_buffer(struct work_struct *work)
{
struct lnet_ping_buffer *pbuf;
struct lnet_handle_md ping_mdh;
mutex_lock(&the_lnet.ln_api_mutex);
atomic_set(&the_lnet.ln_pb_update_ready, 1);
if ((the_lnet.ln_state == LNET_STATE_RUNNING) &&
!lnet_ping_target_setup(&pbuf, &ping_mdh,
LNET_PING_INFO_HDR_SIZE +
lnet_get_ni_bytes(),
false))
lnet_ping_target_update(pbuf, ping_mdh);
mutex_unlock(&the_lnet.ln_api_mutex);
}
void lnet_queue_ping_buffer_update(void)
{
/* don't queue pb update if it is not needed */
if (atomic_dec_if_positive(&the_lnet.ln_update_ping_buf) < 0)
return;
/* don't queue pb update if already queued and not processed */
if (atomic_dec_if_positive(&the_lnet.ln_pb_update_ready) < 0)
return;
INIT_WORK(&the_lnet.ln_pb_update_work, lnet_update_ping_buffer);
queue_work(the_lnet.ln_pb_update_wq, &the_lnet.ln_pb_update_work);
}
void lnet_incr_dlc_seq(void)
{
atomic_inc(&lnet_dlc_seq_no);
}
__u32 lnet_get_dlc_seq_locked(void)
{
return atomic_read(&lnet_dlc_seq_no);
}
static void
lnet_ni_set_healthv(struct lnet_nid *nid, int value)
{
bool all = nid_same(nid, &LNET_ANY_NID);
struct lnet_net *net;
struct lnet_ni *ni;
lnet_net_lock(LNET_LOCK_EX);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (!all && !nid_same(&ni->ni_nid, nid))
continue;
atomic_set(&ni->ni_healthv, value);
if (list_empty(&ni->ni_recovery) &&
value < LNET_MAX_HEALTH_VALUE) {
CERROR("manually adding local NI %s to recovery\n",
libcfs_nidstr(&ni->ni_nid));
list_add_tail(&ni->ni_recovery,
&the_lnet.ln_mt_localNIRecovq);
lnet_ni_addref_locked(ni, 0);
}
/* Update status based on health value transition */
if (value == 0)
lnet_ni_set_status(ni, LNET_NI_STATUS_DOWN);
else if (value == LNET_MAX_HEALTH_VALUE)
lnet_ni_set_status(ni, LNET_NI_STATUS_UP);
if (!all) {
lnet_net_unlock(LNET_LOCK_EX);
return;
}
}
}
lnet_net_unlock(LNET_LOCK_EX);
}
static void
lnet_ni_set_conns_per_peer(lnet_nid_t nid, int value, bool all)
{
struct lnet_net *net;
struct lnet_ni *ni;
lnet_net_lock(LNET_LOCK_EX);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (lnet_nid_to_nid4(&ni->ni_nid) != nid && !all)
continue;
if (LNET_NETTYP(net->net_id) == SOCKLND)
ni->ni_lnd_tunables.lnd_tun_u.lnd_sock.lnd_conns_per_peer = value;
else if (LNET_NETTYP(net->net_id) == O2IBLND)
ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib.lnd_conns_per_peer = value;
if (!all) {
lnet_net_unlock(LNET_LOCK_EX);
return;
}
}
}
lnet_net_unlock(LNET_LOCK_EX);
}
static int
lnet_get_local_ni_hstats(struct lnet_ioctl_local_ni_hstats *stats)
{
int cpt, rc = 0;
struct lnet_ni *ni;
struct lnet_nid nid;
lnet_nid4_to_nid(stats->hlni_nid, &nid);
cpt = lnet_net_lock_current();
ni = lnet_nid_to_ni_locked(&nid, cpt);
if (!ni) {
rc = -ENOENT;
goto unlock;
}
stats->hlni_local_interrupt = atomic_read(&ni->ni_hstats.hlt_local_interrupt);
stats->hlni_local_dropped = atomic_read(&ni->ni_hstats.hlt_local_dropped);
stats->hlni_local_aborted = atomic_read(&ni->ni_hstats.hlt_local_aborted);
stats->hlni_local_no_route = atomic_read(&ni->ni_hstats.hlt_local_no_route);
stats->hlni_local_timeout = atomic_read(&ni->ni_hstats.hlt_local_timeout);
stats->hlni_local_error = atomic_read(&ni->ni_hstats.hlt_local_error);
stats->hlni_fatal_error = atomic_read(&ni->ni_fatal_error_on);
stats->hlni_health_value = atomic_read(&ni->ni_healthv);
stats->hlni_ping_count = ni->ni_ping_count;
stats->hlni_next_ping = ni->ni_next_ping;
unlock:
lnet_net_unlock(cpt);
return rc;
}
static int
lnet_get_local_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
{
struct lnet_ni *ni;
int i = 0;
lnet_net_lock(LNET_LOCK_EX);
list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq, ni_recovery) {
if (!nid_is_nid4(&ni->ni_nid))
continue;
list->rlst_nid_array[i] = lnet_nid_to_nid4(&ni->ni_nid);
i++;
if (i >= LNET_MAX_SHOW_NUM_NID)
break;
}
lnet_net_unlock(LNET_LOCK_EX);
list->rlst_num_nids = i;
return 0;
}
static int
lnet_get_peer_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
{
struct lnet_peer_ni *lpni;
int i = 0;
lnet_net_lock(LNET_LOCK_EX);
list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq, lpni_recovery) {
list->rlst_nid_array[i] = lnet_nid_to_nid4(&lpni->lpni_nid);
i++;
if (i >= LNET_MAX_SHOW_NUM_NID)
break;
}
lnet_net_unlock(LNET_LOCK_EX);
list->rlst_num_nids = i;
return 0;
}
/* LNet ioctl handler. */
int
LNetCtl(unsigned int cmd, void *arg)
{
struct libcfs_ioctl_data *data = arg;
struct lnet_ioctl_config_data *config;
struct lnet_ni *ni;
struct lnet_nid nid;
int rc;
BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
switch (cmd) {
case IOC_LIBCFS_GET_NI: {
struct lnet_processid id = {};
rc = LNetGetId(data->ioc_count, &id, false);
data->ioc_nid = lnet_nid_to_nid4(&id.nid);
return rc;
}
case IOC_LIBCFS_FAIL_NID:
lnet_nid4_to_nid(data->ioc_nid, &nid);
return lnet_fail_nid(&nid, data->ioc_count);
case IOC_LIBCFS_ADD_ROUTE: {
__u32 hops, priority;
config = arg;
if (config->cfg_hdr.ioc_len < sizeof(*config))
return -EINVAL;
hops = config->cfg_config_u.cfg_route.rtr_hop;
priority = config->cfg_config_u.cfg_route.rtr_priority;
lnet_nid4_to_nid(config->cfg_nid, &nid);
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_add_route(config->cfg_net, hops, &nid, priority);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_DEL_ROUTE:
config = arg;
if (config->cfg_hdr.ioc_len < sizeof(*config))
return -EINVAL;
lnet_nid4_to_nid(config->cfg_nid, &nid);
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_del_route(config->cfg_net, &nid);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
case IOC_LIBCFS_GET_ROUTE:
config = arg;
if (config->cfg_hdr.ioc_len < sizeof(*config))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_route(config->cfg_count,
&config->cfg_net,
&config->cfg_config_u.cfg_route.rtr_hop,
&config->cfg_nid,
&config->cfg_config_u.cfg_route.rtr_flags,
&config->cfg_config_u.cfg_route.
rtr_priority);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
case IOC_LIBCFS_GET_LOCAL_NI: {
struct lnet_ioctl_config_ni *cfg_ni;
struct lnet_ioctl_config_lnd_tunables *tun = NULL;
struct lnet_ioctl_element_stats *stats;
__u32 tun_size;
cfg_ni = arg;
/* get the tunables if they are available */
if (cfg_ni->lic_cfg_hdr.ioc_len <
sizeof(*cfg_ni) + sizeof(*stats) + sizeof(*tun))
return -EINVAL;
stats = (struct lnet_ioctl_element_stats *)
cfg_ni->lic_bulk;
tun = (struct lnet_ioctl_config_lnd_tunables *)
(cfg_ni->lic_bulk + sizeof(*stats));
tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
sizeof(*stats);
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS: {
struct lnet_ioctl_element_msg_stats *msg_stats = arg;
int cpt;
if (msg_stats->im_hdr.ioc_len != sizeof(*msg_stats))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
cpt = lnet_net_lock_current();
rc = lnet_get_ni_stats(msg_stats);
lnet_net_unlock(cpt);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_NET: {
size_t total = sizeof(*config) +
sizeof(struct lnet_ioctl_net_config);
config = arg;
if (config->cfg_hdr.ioc_len < total)
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_net_config(config);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_LNET_STATS:
{
struct lnet_ioctl_lnet_stats *lnet_stats = arg;
if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_counters_get(&lnet_stats->st_cntrs);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_RESET_LNET_STATS:
{
mutex_lock(&the_lnet.ln_api_mutex);
lnet_counters_reset();
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
case IOC_LIBCFS_CONFIG_RTR:
config = arg;
if (config->cfg_hdr.ioc_len < sizeof(*config))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
if (config->cfg_config_u.cfg_buffers.buf_enable) {
rc = lnet_rtrpools_enable();
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
lnet_rtrpools_disable();
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
case IOC_LIBCFS_ADD_BUF:
config = arg;
if (config->cfg_hdr.ioc_len < sizeof(*config))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
buf_tiny,
config->cfg_config_u.cfg_buffers.
buf_small,
config->cfg_config_u.cfg_buffers.
buf_large);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
case IOC_LIBCFS_SET_NUMA_RANGE: {
struct lnet_ioctl_set_value *numa;
numa = arg;
if (numa->sv_hdr.ioc_len != sizeof(*numa))
return -EINVAL;
lnet_net_lock(LNET_LOCK_EX);
lnet_numa_range = numa->sv_value;
lnet_net_unlock(LNET_LOCK_EX);
return 0;
}
case IOC_LIBCFS_GET_NUMA_RANGE: {
struct lnet_ioctl_set_value *numa;
numa = arg;
if (numa->sv_hdr.ioc_len != sizeof(*numa))
return -EINVAL;
numa->sv_value = lnet_numa_range;
return 0;
}
case IOC_LIBCFS_GET_BUF: {
struct lnet_ioctl_pool_cfg *pool_cfg;
size_t total = sizeof(*config) + sizeof(*pool_cfg);
config = arg;
if (config->cfg_hdr.ioc_len < total)
return -EINVAL;
pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_LOCAL_HSTATS: {
struct lnet_ioctl_local_ni_hstats *stats = arg;
if (stats->hlni_hdr.ioc_len < sizeof(*stats))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_local_ni_hstats(stats);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_RECOVERY_QUEUE: {
struct lnet_ioctl_recovery_list *list = arg;
if (list->rlst_hdr.ioc_len < sizeof(*list))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
if (list->rlst_type == LNET_HEALTH_TYPE_LOCAL_NI)
rc = lnet_get_local_ni_recovery_list(list);
else
rc = lnet_get_peer_ni_recovery_list(list);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_ADD_PEER_NI: {
struct lnet_ioctl_peer_cfg *cfg = arg;
struct lnet_nid prim_nid;
if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
lnet_nid4_to_nid(cfg->prcfg_prim_nid, &prim_nid);
lnet_nid4_to_nid(cfg->prcfg_cfg_nid, &nid);
rc = lnet_user_add_peer_ni(&prim_nid, &nid, cfg->prcfg_mr,
cfg->prcfg_count == 1);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_DEL_PEER_NI: {
struct lnet_ioctl_peer_cfg *cfg = arg;
struct lnet_nid prim_nid;
if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
lnet_nid4_to_nid(cfg->prcfg_prim_nid, &prim_nid);
lnet_nid4_to_nid(cfg->prcfg_cfg_nid, &nid);
rc = lnet_del_peer_ni(&prim_nid,
&nid,
cfg->prcfg_count);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_PEER_INFO: {
struct lnet_ioctl_peer *peer_info = arg;
if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_peer_ni_info(
peer_info->pr_count,
&peer_info->pr_nid,
peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
&peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
&peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
&peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
&peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
&peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
&peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
&peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_PEER_NI: {
struct lnet_ioctl_peer_cfg *cfg = arg;
if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_peer_info(cfg,
(void __user *)cfg->prcfg_bulk);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_PEER_LIST: {
struct lnet_ioctl_peer_cfg *cfg = arg;
if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_get_peer_list(&cfg->prcfg_count, &cfg->prcfg_size,
(struct lnet_process_id __user *)cfg->prcfg_bulk);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_SET_HEALHV: {
struct lnet_ioctl_reset_health_cfg *cfg = arg;
int value;
if (cfg->rh_hdr.ioc_len < sizeof(*cfg))
return -EINVAL;
if (cfg->rh_value < 0 ||
cfg->rh_value > LNET_MAX_HEALTH_VALUE)
value = LNET_MAX_HEALTH_VALUE;
else
value = cfg->rh_value;
CDEBUG(D_NET, "Manually setting healthv to %d for %s:%s. all = %d\n",
value, (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) ?
"local" : "peer", libcfs_nid2str(cfg->rh_nid), cfg->rh_all);
lnet_nid4_to_nid(cfg->rh_nid, &nid);
mutex_lock(&the_lnet.ln_api_mutex);
if (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) {
if (cfg->rh_all)
nid = LNET_ANY_NID;
lnet_ni_set_healthv(&nid, value);
} else {
lnet_peer_ni_set_healthv(&nid, value, cfg->rh_all);
}
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
case IOC_LIBCFS_SET_PEER: {
struct lnet_ioctl_peer_cfg *cfg = arg;
struct lnet_peer *lp;
if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
lnet_nid4_to_nid(cfg->prcfg_prim_nid, &nid);
lp = lnet_find_peer(&nid);
if (!lp) {
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOENT;
}
spin_lock(&lp->lp_lock);
lp->lp_state = cfg->prcfg_state;
spin_unlock(&lp->lp_lock);
lnet_peer_decref_locked(lp);
mutex_unlock(&the_lnet.ln_api_mutex);
CDEBUG(D_NET, "Set peer %s state to %u\n",
libcfs_nid2str(cfg->prcfg_prim_nid), cfg->prcfg_state);
return 0;
}
case IOC_LIBCFS_SET_CONNS_PER_PEER: {
struct lnet_ioctl_reset_conns_per_peer_cfg *cfg = arg;
int value;
if (cfg->rcpp_hdr.ioc_len < sizeof(*cfg))
return -EINVAL;
if (cfg->rcpp_value < 0)
value = 1;
else
value = cfg->rcpp_value;
CDEBUG(D_NET,
"Setting conns_per_peer to %d for %s. all = %d\n",
value, libcfs_nid2str(cfg->rcpp_nid), cfg->rcpp_all);
mutex_lock(&the_lnet.ln_api_mutex);
lnet_ni_set_conns_per_peer(cfg->rcpp_nid, value, cfg->rcpp_all);
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
case IOC_LIBCFS_NOTIFY_ROUTER: {
/* Convert the user-supplied real time to monotonic.
* NB: "when" is always in the past
*/
time64_t when = ktime_get_seconds() -
(ktime_get_real_seconds() - data->ioc_u64[0]);
lnet_nid4_to_nid(data->ioc_nid, &nid);
return lnet_notify(NULL, &nid, data->ioc_flags, false, when);
}
case IOC_LIBCFS_LNET_DIST:
lnet_nid4_to_nid(data->ioc_nid, &nid);
rc = LNetDist(&nid, &nid, &data->ioc_u32[1]);
if (rc < 0 && rc != -EHOSTUNREACH)
return rc;
data->ioc_nid = lnet_nid_to_nid4(&nid);
data->ioc_u32[0] = rc;
return 0;
case IOC_LIBCFS_TESTPROTOCOMPAT:
the_lnet.ln_testprotocompat = data->ioc_flags;
return 0;
case IOC_LIBCFS_LNET_FAULT:
return lnet_fault_ctl(data->ioc_flags, data);
case IOC_LIBCFS_PING_PEER: {
struct lnet_ioctl_ping_data *ping = arg;
struct lnet_process_id __user *ids = ping->ping_buf;
struct lnet_nid src_nid = LNET_ANY_NID;
struct lnet_genl_ping_list plist;
struct lnet_processid id;
struct lnet_peer *lp;
signed long timeout;
int count, i;
/* Check if the supplied ping data supports source nid
* NB: This check is sufficient if lnet_ioctl_ping_data has
* additional fields added, but if they are re-ordered or
* fields removed then this will break. It is expected that
* these ioctls will be replaced with netlink implementation, so
* it is probably not worth coming up with a more robust version
* compatibility scheme.
*/
if (ping->ping_hdr.ioc_len >= sizeof(struct lnet_ioctl_ping_data))
lnet_nid4_to_nid(ping->ping_src, &src_nid);
/* If timeout is negative then set default of 3 minutes */
if (((s32)ping->op_param) <= 0 ||
ping->op_param > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
else
timeout = nsecs_to_jiffies(ping->op_param * NSEC_PER_MSEC);
id.pid = ping->ping_id.pid;
lnet_nid4_to_nid(ping->ping_id.nid, &id.nid);
rc = lnet_ping(&id, &src_nid, timeout, &plist,
ping->ping_count);
if (rc < 0)
goto report_ping_err;
count = rc;
rc = 0;
for (i = 0; i < count; i++) {
struct lnet_processid *result;
struct lnet_process_id tmpid;
result = genradix_ptr(&plist.lgpl_list, i);
memset(&tmpid, 0, sizeof(tmpid));
tmpid.pid = result->pid;
tmpid.nid = lnet_nid_to_nid4(&result->nid);
if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid))) {
rc = -EFAULT;
goto report_ping_err;
}
}
mutex_lock(&the_lnet.ln_api_mutex);
lp = lnet_find_peer(&id.nid);
if (lp) {
ping->ping_id.nid =
lnet_nid_to_nid4(&lp->lp_primary_nid);
ping->mr_info = lnet_peer_is_multi_rail(lp);
lnet_peer_decref_locked(lp);
}
mutex_unlock(&the_lnet.ln_api_mutex);
ping->ping_count = count;
report_ping_err:
genradix_free(&plist.lgpl_list);
return rc;
}
case IOC_LIBCFS_DISCOVER: {
struct lnet_ioctl_ping_data *discover = arg;
struct lnet_process_id __user *ids;
struct lnet_genl_ping_list dlists;
struct lnet_processid id;
struct lnet_peer *lp;
int count, i;
if (discover->ping_count <= 0)
return -EINVAL;
genradix_init(&dlists.lgpl_list);
/* If the user buffer has more space than the lnet_interfaces_max,
* then only fill it up to lnet_interfaces_max.
*/
if (discover->ping_count > lnet_interfaces_max)
discover->ping_count = lnet_interfaces_max;
id.pid = discover->ping_id.pid;
lnet_nid4_to_nid(discover->ping_id.nid, &id.nid);
rc = lnet_discover(&id, discover->op_param, &dlists);
if (rc < 0)
goto report_discover_err;
count = rc;
ids = discover->ping_buf;
for (i = 0; i < count; i++) {
struct lnet_processid *result;
struct lnet_process_id tmpid;
result = genradix_ptr(&dlists.lgpl_list, i);
memset(&tmpid, 0, sizeof(tmpid));
tmpid.pid = result->pid;
tmpid.nid = lnet_nid_to_nid4(&result->nid);
if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid))) {
rc = -EFAULT;
goto report_discover_err;
}
if (i >= discover->ping_count)
break;
}
rc = 0;
mutex_lock(&the_lnet.ln_api_mutex);
lp = lnet_find_peer(&id.nid);
if (lp) {
discover->ping_id.nid =
lnet_nid_to_nid4(&lp->lp_primary_nid);
discover->mr_info = lnet_peer_is_multi_rail(lp);
lnet_peer_decref_locked(lp);
}
mutex_unlock(&the_lnet.ln_api_mutex);
discover->ping_count = count;
report_discover_err:
genradix_free(&dlists.lgpl_list);
return rc;
}
case IOC_LIBCFS_ADD_UDSP: {
struct lnet_ioctl_udsp *ioc_udsp = arg;
__u32 bulk_size = ioc_udsp->iou_hdr.ioc_len;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_udsp_demarshal_add(arg, bulk_size);
if (!rc) {
rc = lnet_udsp_apply_policies(NULL, false);
CDEBUG(D_NET, "policy application returned %d\n", rc);
rc = 0;
}
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_DEL_UDSP: {
struct lnet_ioctl_udsp *ioc_udsp = arg;
int idx = ioc_udsp->iou_idx;
if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
return -EINVAL;
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_udsp_del_policy(idx);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_UDSP_SIZE: {
struct lnet_ioctl_udsp *ioc_udsp = arg;
struct lnet_udsp *udsp;
if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
return -EINVAL;
rc = 0;
mutex_lock(&the_lnet.ln_api_mutex);
udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
if (!udsp) {
rc = -ENOENT;
} else {
/* coming in iou_idx will hold the idx of the udsp
* to get the size of. going out the iou_idx will
* hold the size of the UDSP found at the passed
* in index.
*/
ioc_udsp->iou_idx = lnet_get_udsp_size(udsp);
if (ioc_udsp->iou_idx < 0)
rc = -EINVAL;
}
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_UDSP: {
struct lnet_ioctl_udsp *ioc_udsp = arg;
struct lnet_udsp *udsp;
if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
return -EINVAL;
rc = 0;
mutex_lock(&the_lnet.ln_api_mutex);
udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
if (!udsp)
rc = -ENOENT;
else
rc = lnet_udsp_marshal(udsp, ioc_udsp);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
case IOC_LIBCFS_GET_CONST_UDSP_INFO: {
struct lnet_ioctl_construct_udsp_info *info = arg;
if (info->cud_hdr.ioc_len < sizeof(*info))
return -EINVAL;
CDEBUG(D_NET, "GET_UDSP_INFO for %s\n",
libcfs_nid2str(info->cud_nid));
lnet_nid4_to_nid(info->cud_nid, &nid);
mutex_lock(&the_lnet.ln_api_mutex);
lnet_net_lock(0);
lnet_udsp_get_construct_info(info, &nid);
lnet_net_unlock(0);
mutex_unlock(&the_lnet.ln_api_mutex);
return 0;
}
default:
ni = lnet_net2ni_addref(data->ioc_net);
if (ni == NULL)
return -EINVAL;
if (ni->ni_net->net_lnd->lnd_ctl == NULL)
rc = -EINVAL;
else
rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
lnet_ni_decref(ni);
return rc <= 0 ? rc : 0;
}
/* not reached */
}
EXPORT_SYMBOL(LNetCtl);
static int lnet_net_conf_cmd(struct sk_buff *skb, struct genl_info *info)
{
int rc = 0;
if (info->nlhdr->nlmsg_flags & NLM_F_CREATE) {
/* NLM_F_EXCL means ignore module parameters */
if (info->nlhdr->nlmsg_flags & NLM_F_EXCL)
the_lnet.ln_nis_from_mod_params = true;
if (info->nlhdr->nlmsg_flags & NLM_F_APPEND)
the_lnet.ln_nis_use_large_nids = true;
rc = lnet_configure(NULL);
switch (rc) {
case -ENETDOWN:
GENL_SET_ERR_MSG(info,
"Network is down");
break;
case -ENODEV:
GENL_SET_ERR_MSG(info,
"LNET is currently not loaded");
break;
case -EBUSY:
GENL_SET_ERR_MSG(info, "LNET busy");
break;
default:
break;
}
} else {
rc = lnet_unconfigure();
}
return rc;
};
struct lnet_nid_cpt {
struct lnet_nid lnc_nid;
unsigned int lnc_cpt;
};
struct lnet_genl_nid_cpt_list {
unsigned int lgncl_index;
unsigned int lgncl_list_count;
GENRADIX(struct lnet_nid_cpt) lgncl_lnc_list;
};
static inline struct lnet_genl_nid_cpt_list *
lnet_cpt_of_nid_dump_ctx(struct netlink_callback *cb)
{
return (struct lnet_genl_nid_cpt_list *)cb->args[0];
}
static int lnet_cpt_of_nid_show_done(struct netlink_callback *cb)
{
struct lnet_genl_nid_cpt_list *lgncl;
lgncl = lnet_cpt_of_nid_dump_ctx(cb);
if (lgncl) {
genradix_free(&lgncl->lgncl_lnc_list);
LIBCFS_FREE(lgncl, sizeof(*lgncl));
cb->args[0] = 0;
}
return 0;
}
static int lnet_cpt_of_nid_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
struct lnet_genl_nid_cpt_list *lgncl;
int msg_len = genlmsg_len(gnlh);
struct nlattr *params, *top;
int rem, rc = 0;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
NL_SET_ERR_MSG(extack, "Network is down");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENETDOWN;
}
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
NL_SET_ERR_MSG(extack, "Missing NID argument(s)");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOENT;
}
LIBCFS_ALLOC(lgncl, sizeof(*lgncl));
if (!lgncl) {
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOMEM;
}
genradix_init(&lgncl->lgncl_lnc_list);
lgncl->lgncl_list_count = 0;
cb->args[0] = (long)lgncl;
params = genlmsg_data(gnlh);
nla_for_each_attr(top, params, msg_len, rem) {
struct nlattr *nids;
int rem2;
switch (nla_type(top)) {
case LN_SCALAR_ATTR_LIST:
nla_for_each_nested(nids, top, rem2) {
char nidstr[LNET_NIDSTR_SIZE + 1];
struct lnet_nid_cpt *lnc;
if (nla_type(nids) != LN_SCALAR_ATTR_VALUE)
continue;
memset(nidstr, 0, sizeof(nidstr));
rc = nla_strscpy(nidstr, nids, sizeof(nidstr));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to get NID");
GOTO(report_err, rc);
}
lnc = genradix_ptr_alloc(&lgncl->lgncl_lnc_list,
lgncl->lgncl_list_count++,
GFP_KERNEL);
if (!lnc) {
NL_SET_ERR_MSG(extack,
"failed to allocate NID");
GOTO(report_err, rc = -ENOMEM);
}
rc = libcfs_strnid(&lnc->lnc_nid,
strim(nidstr));
if (rc < 0) {
NL_SET_ERR_MSG(extack, "invalid NID");
GOTO(report_err, rc);
}
rc = 0;
CDEBUG(D_NET, "nid: %s\n",
libcfs_nidstr(&lnc->lnc_nid));
}
fallthrough;
default:
break;
}
}
report_err:
mutex_unlock(&the_lnet.ln_api_mutex);
if (rc < 0)
lnet_cpt_of_nid_show_done(cb);
return rc;
}
static const struct ln_key_list cpt_of_nid_props_list = {
.lkl_maxattr = LNET_CPT_OF_NID_ATTR_MAX,
.lkl_list = {
[LNET_CPT_OF_NID_ATTR_HDR] = {
.lkp_value = "cpt-of-nid",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_CPT_OF_NID_ATTR_NID] = {
.lkp_value = "nid",
.lkp_data_type = NLA_STRING,
},
[LNET_CPT_OF_NID_ATTR_CPT] = {
.lkp_value = "cpt",
.lkp_data_type = NLA_U32,
},
},
};
static int lnet_cpt_of_nid_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_nid_cpt_list *lgncl;
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
int seq = cb->nlh->nlmsg_seq;
int idx;
int rc = 0;
bool need_hdr = true;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
NL_SET_ERR_MSG(extack, "Network is down");
GOTO(send_error, rc = -ENETDOWN);
}
lgncl = lnet_cpt_of_nid_dump_ctx(cb);
idx = lgncl->lgncl_index;
if (!lgncl->lgncl_index) {
const struct ln_key_list *all[] = {
&cpt_of_nid_props_list, NULL, NULL
};
rc = lnet_genl_send_scalar_list(msg, portid, seq, &lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_CPT_OF_NID, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(send_error, rc);
}
}
while (idx < lgncl->lgncl_list_count) {
struct lnet_nid_cpt *lnc;
void *hdr;
int cpt;
lnc = genradix_ptr(&lgncl->lgncl_lnc_list, idx++);
cpt = lnet_nid_cpt_hash(&lnc->lnc_nid, LNET_CPT_NUMBER);
CDEBUG(D_NET, "nid: %s cpt: %d\n", libcfs_nidstr(&lnc->lnc_nid), cpt);
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_CPT_OF_NID);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
genlmsg_cancel(msg, hdr);
GOTO(send_error, rc = -EMSGSIZE);
}
if (need_hdr) {
nla_put_string(msg, LNET_CPT_OF_NID_ATTR_HDR, "");
need_hdr = false;
}
nla_put_string(msg, LNET_CPT_OF_NID_ATTR_NID,
libcfs_nidstr(&lnc->lnc_nid));
nla_put_u32(msg, LNET_CPT_OF_NID_ATTR_CPT, cpt);
genlmsg_end(msg, hdr);
}
genradix_free(&lgncl->lgncl_lnc_list);
rc = 0;
lgncl->lgncl_index = idx;
send_error:
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
/* This is the keys for the UDSP info which is used by many
* Netlink commands.
*/
static const struct ln_key_list udsp_info_list = {
.lkl_maxattr = LNET_UDSP_INFO_ATTR_MAX,
.lkl_list = {
[LNET_UDSP_INFO_ATTR_NET_PRIORITY] = {
.lkp_value = "net priority",
.lkp_data_type = NLA_S32
},
[LNET_UDSP_INFO_ATTR_NID_PRIORITY] = {
.lkp_value = "nid priority",
.lkp_data_type = NLA_S32
},
[LNET_UDSP_INFO_ATTR_PREF_RTR_NIDS_LIST] = {
.lkp_value = "Preferred gateway NIDs",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED,
},
[LNET_UDSP_INFO_ATTR_PREF_NIDS_LIST] = {
.lkp_value = "Preferred source NIDs",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED,
},
},
};
static const struct ln_key_list udsp_info_pref_nids_list = {
.lkl_maxattr = LNET_UDSP_INFO_PREF_NIDS_ATTR_MAX,
.lkl_list = {
[LNET_UDSP_INFO_PREF_NIDS_ATTR_INDEX] = {
.lkp_value = "NID-0",
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_UDSP_INFO_PREF_NIDS_ATTR_NID] = {
.lkp_value = "0@lo",
.lkp_data_type = NLA_STRING,
},
},
};
static int lnet_udsp_info_send(struct sk_buff *msg, int attr,
struct lnet_nid *nid, bool remote)
{
struct lnet_ioctl_construct_udsp_info *udsp;
struct nlattr *udsp_attr, *udsp_info;
struct nlattr *udsp_list_attr;
struct nlattr *udsp_list_info;
int i;
LIBCFS_ALLOC_ATOMIC(udsp, sizeof(*udsp));
if (!udsp)
return -ENOMEM;
udsp->cud_peer = remote;
lnet_udsp_get_construct_info(udsp, nid);
udsp_info = nla_nest_start(msg, attr);
udsp_attr = nla_nest_start(msg, 0);
nla_put_s32(msg, LNET_UDSP_INFO_ATTR_NET_PRIORITY,
udsp->cud_net_priority);
nla_put_s32(msg, LNET_UDSP_INFO_ATTR_NID_PRIORITY,
udsp->cud_nid_priority);
if (udsp->cud_pref_rtr_nid[0] == 0)
goto skip_list;
udsp_list_info = nla_nest_start(msg,
LNET_UDSP_INFO_ATTR_PREF_RTR_NIDS_LIST);
for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
char tmp[8]; /* NID-"3 number"\0 */
if (udsp->cud_pref_rtr_nid[i] == 0)
break;
udsp_list_attr = nla_nest_start(msg, i);
snprintf(tmp, sizeof(tmp), "NID-%d", i);
nla_put_string(msg, LNET_UDSP_INFO_PREF_NIDS_ATTR_INDEX,
tmp);
nla_put_string(msg, LNET_UDSP_INFO_PREF_NIDS_ATTR_NID,
libcfs_nid2str(udsp->cud_pref_rtr_nid[i]));
nla_nest_end(msg, udsp_list_attr);
}
nla_nest_end(msg, udsp_list_info);
skip_list:
nla_nest_end(msg, udsp_attr);
nla_nest_end(msg, udsp_info);
LIBCFS_FREE(udsp, sizeof(*udsp));
return 0;
}
/* LNet NI handling */
static const struct ln_key_list net_props_list = {
.lkl_maxattr = LNET_NET_ATTR_MAX,
.lkl_list = {
[LNET_NET_ATTR_HDR] = {
.lkp_value = "net",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_NET_ATTR_TYPE] = {
.lkp_value = "net type",
.lkp_data_type = NLA_STRING
},
[LNET_NET_ATTR_LOCAL] = {
.lkp_value = "local NI(s)",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
},
};
static struct ln_key_list local_ni_list = {
.lkl_maxattr = LNET_NET_LOCAL_NI_ATTR_MAX,
.lkl_list = {
[LNET_NET_LOCAL_NI_ATTR_NID] = {
.lkp_value = "nid",
.lkp_data_type = NLA_STRING
},
[LNET_NET_LOCAL_NI_ATTR_STATUS] = {
.lkp_value = "status",
.lkp_data_type = NLA_STRING
},
[LNET_NET_LOCAL_NI_ATTR_INTERFACE] = {
.lkp_value = "interfaces",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_STATS] = {
.lkp_value = "statistics",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_UDSP_INFO] = {
.lkp_value = "udsp info",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_SEND_STATS] = {
.lkp_value = "sent_stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_RECV_STATS] = {
.lkp_value = "received_stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_DROPPED_STATS] = {
.lkp_value = "dropped_stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_HEALTH_STATS] = {
.lkp_value = "health stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_TUNABLES] = {
.lkp_value = "tunables",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_ATTR_LND_TUNABLES] = {
.lkp_value = "lnd tunables",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_NET_LOCAL_NI_DEV_CPT] = {
.lkp_value = "dev cpt",
.lkp_data_type = NLA_S32,
},
[LNET_NET_LOCAL_NI_CPTS] = {
.lkp_value = "CPT",
.lkp_data_type = NLA_STRING,
},
},
};
static const struct ln_key_list local_ni_interfaces_list = {
.lkl_maxattr = LNET_NET_LOCAL_NI_INTF_ATTR_MAX,
.lkl_list = {
[LNET_NET_LOCAL_NI_INTF_ATTR_TYPE] = {
.lkp_value = "0",
.lkp_data_type = NLA_STRING
},
},
};
static const struct ln_key_list local_ni_stats_list = {
.lkl_maxattr = LNET_NET_LOCAL_NI_STATS_ATTR_MAX,
.lkl_list = {
[LNET_NET_LOCAL_NI_STATS_ATTR_SEND_COUNT] = {
.lkp_value = "send_count",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_STATS_ATTR_RECV_COUNT] = {
.lkp_value = "recv_count",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_STATS_ATTR_DROP_COUNT] = {
.lkp_value = "drop_count",
.lkp_data_type = NLA_U32
},
},
};
static const struct ln_key_list local_ni_msg_stats_list = {
.lkl_maxattr = LNET_NET_LOCAL_NI_MSG_STATS_ATTR_MAX,
.lkl_list = {
[LNET_NET_LOCAL_NI_MSG_STATS_ATTR_PUT_COUNT] = {
.lkp_value = "put",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_MSG_STATS_ATTR_GET_COUNT] = {
.lkp_value = "get",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_MSG_STATS_ATTR_REPLY_COUNT] = {
.lkp_value = "reply",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_MSG_STATS_ATTR_ACK_COUNT] = {
.lkp_value = "ack",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_MSG_STATS_ATTR_HELLO_COUNT] = {
.lkp_value = "hello",
.lkp_data_type = NLA_U32
},
},
};
static const struct ln_key_list local_ni_health_stats_list = {
.lkl_maxattr = LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_MAX,
.lkl_list = {
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_FATAL_ERRORS] = {
.lkp_value = "fatal_error",
.lkp_data_type = NLA_S32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_LEVEL] = {
.lkp_value = "health value",
.lkp_data_type = NLA_S32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_INTERRUPTS] = {
.lkp_value = "interrupts",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_DROPPED] = {
.lkp_value = "dropped",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_ABORTED] = {
.lkp_value = "aborted",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_NO_ROUTE] = {
.lkp_value = "no route",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_TIMEOUTS] = {
.lkp_value = "timeouts",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_ERROR] = {
.lkp_value = "error",
.lkp_data_type = NLA_U32
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_PING_COUNT] = {
.lkp_value = "ping_count",
.lkp_data_type = NLA_U32,
},
[LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_NEXT_PING] = {
.lkp_value = "next_ping",
.lkp_data_type = NLA_U64
},
},
};
static const struct ln_key_list local_ni_tunables_list = {
.lkl_maxattr = LNET_NET_LOCAL_NI_TUNABLES_ATTR_MAX,
.lkl_list = {
[LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_TIMEOUT] = {
.lkp_value = "peer_timeout",
.lkp_data_type = NLA_S32
},
[LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_CREDITS] = {
.lkp_value = "peer_credits",
.lkp_data_type = NLA_S32
},
[LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_BUFFER_CREDITS] = {
.lkp_value = "peer_buffer_credits",
.lkp_data_type = NLA_S32
},
[LNET_NET_LOCAL_NI_TUNABLES_ATTR_CREDITS] = {
.lkp_value = "credits",
.lkp_data_type = NLA_S32
},
},
};
/* Use an index since the traversal is across LNet nets and ni collections */
struct lnet_genl_net_list {
unsigned int lngl_net_id;
unsigned int lngl_idx;
};
static inline struct lnet_genl_net_list *
lnet_net_dump_ctx(struct netlink_callback *cb)
{
return (struct lnet_genl_net_list *)cb->args[0];
}
static int lnet_net_show_done(struct netlink_callback *cb)
{
struct lnet_genl_net_list *nlist = lnet_net_dump_ctx(cb);
if (nlist) {
LIBCFS_FREE(nlist, sizeof(*nlist));
cb->args[0] = 0;
}
return 0;
}
/* LNet net ->start() handler for GET requests */
static int lnet_net_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
struct lnet_genl_net_list *nlist;
int msg_len = genlmsg_len(gnlh);
struct nlattr *params, *top;
int rem, rc = 0;
if (the_lnet.ln_refcount == 0) {
NL_SET_ERR_MSG(extack, "LNet stack down");
return -ENETDOWN;
}
LIBCFS_ALLOC(nlist, sizeof(*nlist));
if (!nlist)
return -ENOMEM;
nlist->lngl_net_id = LNET_NET_ANY;
nlist->lngl_idx = 0;
cb->args[0] = (long)nlist;
cb->min_dump_alloc = U16_MAX;
if (!msg_len)
return 0;
params = genlmsg_data(gnlh);
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
NL_SET_ERR_MSG(extack, "invalid configuration");
return -EINVAL;
}
nla_for_each_nested(top, params, rem) {
struct nlattr *net;
int rem2;
nla_for_each_nested(net, top, rem2) {
char filter[LNET_NIDSTR_SIZE];
if (nla_type(net) != LN_SCALAR_ATTR_VALUE ||
nla_strcmp(net, "net type") != 0)
continue;
net = nla_next(net, &rem2);
if (nla_type(net) != LN_SCALAR_ATTR_VALUE) {
NL_SET_ERR_MSG(extack, "invalid config param");
GOTO(report_err, rc = -EINVAL);
}
rc = nla_strscpy(filter, net, sizeof(filter));
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to get param");
GOTO(report_err, rc);
}
rc = 0;
nlist->lngl_net_id = libcfs_str2net(filter);
if (nlist->lngl_net_id == LNET_NET_ANY) {
NL_SET_ERR_MSG(extack, "cannot parse net");
GOTO(report_err, rc = -ENOENT);
}
}
}
report_err:
if (rc < 0)
lnet_net_show_done(cb);
return rc;
}
static const struct ln_key_list net_update_props_list = {
.lkl_maxattr = LNET_NET_ATTR_MAX,
.lkl_list = {
[LNET_NET_ATTR_HDR] = {
.lkp_value = "",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_NET_ATTR_TYPE] = {
.lkp_value = "net type",
.lkp_data_type = NLA_STRING
},
[LNET_NET_ATTR_LOCAL] = {
.lkp_value = "local NI(s)",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
},
};
static int lnet_net_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_net_list *nlist = lnet_net_dump_ctx(cb);
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
bool found = false, started = false;
const struct lnet_lnd *lnd = NULL;
int idx = nlist->lngl_idx, rc = 0;
int seq = cb->nlh->nlmsg_seq;
struct lnet_net *net;
void *hdr = NULL;
bool export_backup = cb->nlh->nlmsg_flags & NLM_F_DUMP_FILTERED;
lnet_net_lock(LNET_LOCK_EX);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
struct nlattr *local_ni, *ni_attr;
bool send_lnd_keys = false;
struct lnet_ni *ni;
int dev = 0;
if (nlist->lngl_net_id != LNET_NET_ANY &&
nlist->lngl_net_id != net->net_id)
continue;
if (export_backup && LNET_NETTYP(net->net_id) == LOLND)
continue;
if (gnlh->version && LNET_NETTYP(net->net_id) != LOLND) {
if (!net->net_lnd) {
NL_SET_ERR_MSG(extack,
"LND not setup for NI");
GOTO(net_unlock, rc = -ENODEV);
}
if (net->net_lnd != lnd) {
send_lnd_keys = true;
lnd = net->net_lnd;
}
}
/* We need to resend the key table every time the base LND
* changed.
*/
if (!idx || send_lnd_keys) {
const struct ln_key_list *all[] = {
&net_props_list, &local_ni_list,
&local_ni_interfaces_list,
&local_ni_stats_list,
&udsp_info_list,
&udsp_info_pref_nids_list,
&udsp_info_pref_nids_list,
&local_ni_msg_stats_list,
&local_ni_msg_stats_list,
&local_ni_msg_stats_list,
&local_ni_health_stats_list,
&local_ni_tunables_list,
NULL, /* lnd tunables */
NULL
};
int flags = NLM_F_CREATE | NLM_F_MULTI;
if (lnd) {
all[ARRAY_SIZE(all) - 2] = lnd->lnd_keys;
if (idx) {
all[0] = &net_update_props_list;
flags |= NLM_F_REPLACE;
}
}
rc = lnet_genl_send_scalar_list(msg, portid, seq,
&lnet_family, flags,
LNET_CMD_NETS, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(net_unlock, rc);
}
started = true;
}
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_NETS);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
GOTO(net_unlock, rc = -EMSGSIZE);
}
if (started) {
nla_put_string(msg, LNET_NET_ATTR_HDR, "");
started = false;
}
nla_put_string(msg, LNET_NET_ATTR_TYPE,
libcfs_net2str(net->net_id));
local_ni = nla_nest_start(msg, LNET_NET_ATTR_LOCAL);
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
char *status = "up";
if (idx++ < nlist->lngl_idx)
continue;
ni_attr = nla_nest_start(msg, dev++);
found = true;
lnet_ni_lock(ni);
if (!export_backup) {
nla_put_string(msg, LNET_NET_LOCAL_NI_ATTR_NID,
libcfs_nidstr(&ni->ni_nid));
if (!nid_is_lo0(&ni->ni_nid) &&
lnet_ni_get_status_locked(ni) != LNET_NI_STATUS_UP)
status = "down";
nla_put_string(msg, LNET_NET_LOCAL_NI_ATTR_STATUS,
status);
}
if (!nid_is_lo0(&ni->ni_nid) && ni->ni_interface) {
struct nlattr *intf_nest, *intf_attr;
intf_nest = nla_nest_start(msg,
LNET_NET_LOCAL_NI_ATTR_INTERFACE);
intf_attr = nla_nest_start(msg, 0);
nla_put_string(msg,
LNET_NET_LOCAL_NI_INTF_ATTR_TYPE,
ni->ni_interface);
nla_nest_end(msg, intf_attr);
nla_nest_end(msg, intf_nest);
}
if (gnlh->version) {
char cpts[LNET_MAX_SHOW_NUM_CPT * 4 + 4], *cpt;
struct lnet_ioctl_element_msg_stats msg_stats;
struct lnet_ioctl_element_stats stats;
size_t buf_len = sizeof(cpts), len;
struct nlattr *health_attr, *health_stats;
struct nlattr *send_attr, *send_stats;
struct nlattr *recv_attr, *recv_stats;
struct nlattr *drop_attr, *drop_stats;
struct nlattr *stats_attr, *ni_stats;
struct nlattr *tun_attr, *ni_tun;
int j;
if (export_backup) {
lnet_ni_unlock(ni);
goto skip_msg_stats;
}
stats.iel_send_count = lnet_sum_stats(&ni->ni_stats,
LNET_STATS_TYPE_SEND);
stats.iel_recv_count = lnet_sum_stats(&ni->ni_stats,
LNET_STATS_TYPE_RECV);
stats.iel_drop_count = lnet_sum_stats(&ni->ni_stats,
LNET_STATS_TYPE_DROP);
lnet_ni_unlock(ni);
stats_attr = nla_nest_start(msg, LNET_NET_LOCAL_NI_ATTR_STATS);
ni_stats = nla_nest_start(msg, 0);
nla_put_u32(msg, LNET_NET_LOCAL_NI_STATS_ATTR_SEND_COUNT,
stats.iel_send_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_STATS_ATTR_RECV_COUNT,
stats.iel_recv_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_STATS_ATTR_DROP_COUNT,
stats.iel_drop_count);
nla_nest_end(msg, ni_stats);
nla_nest_end(msg, stats_attr);
if (gnlh->version < 4)
goto skip_udsp;
/* UDSP info */
rc = lnet_udsp_info_send(msg, LNET_NET_LOCAL_NI_ATTR_UDSP_INFO,
&ni->ni_nid, false);
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"Failed to get udsp info");
genlmsg_cancel(msg, hdr);
GOTO(net_unlock, rc = -ENOMEM);
}
skip_udsp:
if (gnlh->version < 2)
goto skip_msg_stats;
lnet_usr_translate_stats(&msg_stats, &ni->ni_stats);
send_stats = nla_nest_start(msg, LNET_NET_LOCAL_NI_ATTR_SEND_STATS);
send_attr = nla_nest_start(msg, 0);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_GET_COUNT,
msg_stats.im_send_stats.ico_get_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_PUT_COUNT,
msg_stats.im_send_stats.ico_put_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_REPLY_COUNT,
msg_stats.im_send_stats.ico_reply_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_ACK_COUNT,
msg_stats.im_send_stats.ico_ack_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_HELLO_COUNT,
msg_stats.im_send_stats.ico_hello_count);
nla_nest_end(msg, send_attr);
nla_nest_end(msg, send_stats);
recv_stats = nla_nest_start(msg, LNET_NET_LOCAL_NI_ATTR_RECV_STATS);
recv_attr = nla_nest_start(msg, 0);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_GET_COUNT,
msg_stats.im_recv_stats.ico_get_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_PUT_COUNT,
msg_stats.im_recv_stats.ico_put_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_REPLY_COUNT,
msg_stats.im_recv_stats.ico_reply_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_ACK_COUNT,
msg_stats.im_recv_stats.ico_ack_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_HELLO_COUNT,
msg_stats.im_recv_stats.ico_hello_count);
nla_nest_end(msg, recv_attr);
nla_nest_end(msg, recv_stats);
drop_stats = nla_nest_start(msg,
LNET_NET_LOCAL_NI_ATTR_DROPPED_STATS);
drop_attr = nla_nest_start(msg, 0);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_GET_COUNT,
msg_stats.im_drop_stats.ico_get_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_PUT_COUNT,
msg_stats.im_drop_stats.ico_put_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_REPLY_COUNT,
msg_stats.im_drop_stats.ico_reply_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_ACK_COUNT,
msg_stats.im_drop_stats.ico_ack_count);
nla_put_u32(msg, LNET_NET_LOCAL_NI_MSG_STATS_ATTR_HELLO_COUNT,
msg_stats.im_drop_stats.ico_hello_count);
nla_nest_end(msg, drop_attr);
nla_nest_end(msg, drop_stats);
/* health stats */
health_stats = nla_nest_start(msg,
LNET_NET_LOCAL_NI_ATTR_HEALTH_STATS);
health_attr = nla_nest_start(msg, 0);
nla_put_s32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_FATAL_ERRORS,
atomic_read(&ni->ni_fatal_error_on));
nla_put_s32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_LEVEL,
atomic_read(&ni->ni_healthv));
nla_put_u32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_INTERRUPTS,
atomic_read(&ni->ni_hstats.hlt_local_interrupt));
nla_put_u32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_DROPPED,
atomic_read(&ni->ni_hstats.hlt_local_dropped));
nla_put_u32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_ABORTED,
atomic_read(&ni->ni_hstats.hlt_local_aborted));
nla_put_u32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_NO_ROUTE,
atomic_read(&ni->ni_hstats.hlt_local_no_route));
nla_put_u32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_TIMEOUTS,
atomic_read(&ni->ni_hstats.hlt_local_timeout));
nla_put_u32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_ERROR,
atomic_read(&ni->ni_hstats.hlt_local_error));
nla_put_u32(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_PING_COUNT,
ni->ni_ping_count);
nla_put_u64_64bit(msg, LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_NEXT_PING,
ni->ni_next_ping,
LNET_NET_LOCAL_NI_HEALTH_STATS_ATTR_PAD);
nla_nest_end(msg, health_attr);
nla_nest_end(msg, health_stats);
skip_msg_stats:
/* Report net tunables */
tun_attr = nla_nest_start(msg, LNET_NET_LOCAL_NI_ATTR_TUNABLES);
ni_tun = nla_nest_start(msg, 0);
nla_put_s32(msg, LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_TIMEOUT,
ni->ni_net->net_tunables.lct_peer_timeout);
nla_put_s32(msg, LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_CREDITS,
ni->ni_net->net_tunables.lct_peer_tx_credits);
nla_put_s32(msg, LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_BUFFER_CREDITS,
ni->ni_net->net_tunables.lct_peer_rtr_credits);
nla_put_s32(msg, LNET_NET_LOCAL_NI_TUNABLES_ATTR_CREDITS,
ni->ni_net->net_tunables.lct_max_tx_credits);
nla_nest_end(msg, ni_tun);
nla_nest_end(msg, tun_attr);
if (lnd && lnd->lnd_nl_get && lnd->lnd_keys) {
struct nlattr *lnd_tun_attr, *lnd_ni_tun;
lnd_tun_attr = nla_nest_start(msg,
LNET_NET_LOCAL_NI_ATTR_LND_TUNABLES);
lnd_ni_tun = nla_nest_start(msg, 0);
rc = lnd->lnd_nl_get(LNET_CMD_NETS, msg,
LNET_NET_LOCAL_NI_ATTR_LND_TUNABLES,
ni, export_backup);
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to get lnd tunables");
genlmsg_cancel(msg, hdr);
GOTO(net_unlock, rc);
}
nla_nest_end(msg, lnd_ni_tun);
nla_nest_end(msg, lnd_tun_attr);
}
if (!export_backup)
nla_put_s32(msg, LNET_NET_LOCAL_NI_DEV_CPT,
ni->ni_dev_cpt);
/* Report cpts. We could send this as a nested
* list of integers but older versions of the
* tools except a string. The new versions can
* handle both formats so in the future we can
* change this to a nested list.
*/
len = snprintf(cpts, buf_len, "\"[");
cpt = cpts + len;
buf_len -= len;
if (ni->ni_ncpts == LNET_CPT_NUMBER && !ni->ni_cpts) {
for (j = 0; j < ni->ni_ncpts; j++) {
len = snprintf(cpt, buf_len, "%d,", j);
if (len < 0 || len >= buf_len) {
NL_SET_ERR_MSG(extack,
"Output Error/Truncated");
GOTO(net_unlock,
rc = -E2BIG);
}
buf_len -= len;
cpt += len;
}
} else {
for (j = 0;
ni->ni_cpts && j < ni->ni_ncpts &&
j < LNET_MAX_SHOW_NUM_CPT; j++) {
len = snprintf(cpt, buf_len, "%d,",
ni->ni_cpts[j]);
if (len < 0 || len >= buf_len) {
NL_SET_ERR_MSG(extack,
"Output Error/truncated");
GOTO(net_unlock,
rc = -E2BIG);
}
buf_len -= len;
cpt += len;
}
}
snprintf(cpt - 1, buf_len, "]\"");
nla_put_string(msg, LNET_NET_LOCAL_NI_CPTS, cpts);
} else {
lnet_ni_unlock(ni);
}
nla_nest_end(msg, ni_attr);
}
nla_nest_end(msg, local_ni);
genlmsg_end(msg, hdr);
}
if (!export_backup && !found) {
struct nlmsghdr *nlh = nlmsg_hdr(msg);
nlmsg_cancel(msg, nlh);
NL_SET_ERR_MSG(extack, "Network is down");
rc = -ESRCH;
}
nlist->lngl_idx = idx;
net_unlock:
lnet_net_unlock(LNET_LOCK_EX);
return rc;
}
static int lnet_genl_parse_tunables(struct nlattr *settings,
struct lnet_ioctl_config_lnd_tunables *tun)
{
struct nlattr *param;
int rem, rc = 0;
nla_for_each_nested(param, settings, rem) {
int type = LNET_NET_LOCAL_NI_TUNABLES_ATTR_UNSPEC;
s64 num;
if (nla_type(param) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(param, "peer_timeout") == 0)
type = LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_TIMEOUT;
else if (nla_strcmp(param, "peer_credits") == 0)
type = LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_CREDITS;
else if (nla_strcmp(param, "peer_buffer_credits") == 0)
type = LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_BUFFER_CREDITS;
else if (nla_strcmp(param, "credits") == 0)
type = LNET_NET_LOCAL_NI_TUNABLES_ATTR_CREDITS;
param = nla_next(param, &rem);
if (nla_type(param) != LN_SCALAR_ATTR_INT_VALUE)
return -EINVAL;
num = nla_get_s64(param);
switch (type) {
case LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_TIMEOUT:
if (num >= 0)
tun->lt_cmn.lct_peer_timeout = num;
break;
case LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_CREDITS:
if (num > 0)
tun->lt_cmn.lct_peer_tx_credits = num;
break;
case LNET_NET_LOCAL_NI_TUNABLES_ATTR_PEER_BUFFER_CREDITS:
if (num > 0)
tun->lt_cmn.lct_peer_rtr_credits = num;
break;
case LNET_NET_LOCAL_NI_TUNABLES_ATTR_CREDITS:
if (num > 0)
tun->lt_cmn.lct_max_tx_credits = num;
break;
default:
rc = -EINVAL;
break;
}
}
return rc;
}
static int lnet_genl_parse_lnd_tunables(struct nlattr *settings,
struct lnet_lnd_tunables *tun,
const struct lnet_lnd *lnd)
{
const struct ln_key_list *list = lnd->lnd_keys;
struct nlattr *param;
int rem, rc = 0;
int i = 1;
/* silently ignore these setting if the LND driver doesn't
* support any LND tunables
*/
if (!list || !lnd->lnd_nl_set || !list->lkl_maxattr)
return 0;
nla_for_each_nested(param, settings, rem) {
if (nla_type(param) != LN_SCALAR_ATTR_VALUE)
continue;
for (i = 1; i <= list->lkl_maxattr; i++) {
if (!list->lkl_list[i].lkp_value ||
nla_strcmp(param, list->lkl_list[i].lkp_value) != 0)
continue;
param = nla_next(param, &rem);
rc = lnd->lnd_nl_set(LNET_CMD_NETS, param, i, tun);
if (rc < 0)
return rc;
}
}
return rc;
}
static inline int
lnet_genl_init_tunables(const struct lnet_lnd *lnd,
struct lnet_ioctl_config_lnd_tunables *tun)
{
tun->lt_cmn.lct_peer_timeout = -1;
tun->lt_cmn.lct_peer_tx_credits = -1;
tun->lt_cmn.lct_peer_rtr_credits = -1;
tun->lt_cmn.lct_max_tx_credits = -1;
if (!lnd || !lnd->lnd_tun_defaults)
return 0;
/* init lnd tunables with default values */
return lnd->lnd_tun_defaults(&tun->lt_tun, &tun->lt_cmn);
}
static int
lnet_genl_parse_local_ni(struct nlattr *entry, struct genl_info *info,
int net_id, struct lnet_ioctl_config_ni *conf,
bool *ni_list)
{
struct lnet_ioctl_config_lnd_tunables *tun;
struct lnet_nid nid = LNET_ANY_NID;
const struct lnet_lnd *lnd = NULL;
struct nlattr *settings;
int healthv = -1;
int rem3, rc = 0;
if (net_id != LNET_NET_ANY) {
lnd = lnet_load_lnd(LNET_NETTYP(net_id));
if (IS_ERR(lnd)) {
GENL_SET_ERR_MSG(info, "LND type not supported");
RETURN(PTR_ERR(lnd));
}
}
LIBCFS_ALLOC(tun, sizeof(struct lnet_ioctl_config_lnd_tunables));
if (!tun) {
GENL_SET_ERR_MSG(info, "cannot allocate memory for tunables");
GOTO(out, rc = -ENOMEM);
}
/* Use LND defaults */
rc = lnet_genl_init_tunables(lnd, tun);
if (rc < 0) {
GENL_SET_ERR_MSG(info, "default tunables are invalid");
GOTO(out, rc);
}
conf->lic_ncpts = 0;
nla_for_each_nested(settings, entry, rem3) {
if (nla_type(settings) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(settings, "interfaces") == 0) {
struct nlattr *intf;
int rem4;
settings = nla_next(settings, &rem3);
if (nla_type(settings) !=
LN_SCALAR_ATTR_LIST) {
GENL_SET_ERR_MSG(info,
"invalid interfaces");
GOTO(out, rc = -EINVAL);
}
nla_for_each_nested(intf, settings, rem4) {
intf = nla_next(intf, &rem4);
if (nla_type(intf) !=
LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"cannot parse interface");
GOTO(out, rc = -EINVAL);
}
rc = nla_strscpy(conf->lic_ni_intf, intf,
sizeof(conf->lic_ni_intf));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to parse interfaces");
GOTO(out, rc);
}
}
*ni_list = true;
} else if (nla_strcmp(settings, "nid") == 0 &&
net_id != LNET_NET_ANY) {
char nidstr[LNET_NIDSTR_SIZE];
settings = nla_next(settings, &rem3);
if (nla_type(settings) != LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info, "cannot parse NID");
GOTO(out, rc = -EINVAL);
}
rc = nla_strscpy(nidstr, settings, sizeof(nidstr));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to parse NID");
GOTO(out, rc);
}
CDEBUG(D_NET, "Requested NID %s\n", nidstr);
rc = libcfs_strnid(&nid, strim(nidstr));
if (rc < 0) {
GENL_SET_ERR_MSG(info, "unsupported NID");
GOTO(out, rc);
}
if (!(info->nlhdr->nlmsg_flags & NLM_F_REPLACE) &&
nid_same(&nid, &LNET_ANY_NID)) {
GENL_SET_ERR_MSG(info, "any NID not supported");
GOTO(out, rc = -EINVAL);
}
*ni_list = true;
} else if (nla_strcmp(settings, "health stats") == 0 &&
info->nlhdr->nlmsg_flags & NLM_F_REPLACE) {
struct nlattr *health;
int rem4;
settings = nla_next(settings, &rem3);
if (nla_type(settings) != LN_SCALAR_ATTR_LIST) {
GENL_SET_ERR_MSG(info,
"cannot parse health stats");
GOTO(out, rc = -EINVAL);
}
nla_for_each_nested(health, settings, rem4) {
if (nla_type(health) != LN_SCALAR_ATTR_VALUE ||
nla_strcmp(health, "health value") != 0) {
GENL_SET_ERR_MSG(info,
"wrong health config format");
GOTO(out, rc = -EINVAL);
}
health = nla_next(health, &rem4);
if (nla_type(health) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"invalid health config format");
GOTO(out, rc = -EINVAL);
}
healthv = nla_get_s64(health);
clamp_t(s64, healthv, 0, LNET_MAX_HEALTH_VALUE);
}
} else if (nla_strcmp(settings, "tunables") == 0) {
settings = nla_next(settings, &rem3);
if (nla_type(settings) !=
LN_SCALAR_ATTR_LIST) {
GENL_SET_ERR_MSG(info,
"invalid tunables");
GOTO(out, rc = -EINVAL);
}
rc = lnet_genl_parse_tunables(settings, tun);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to parse tunables");
GOTO(out, rc);
}
} else if ((nla_strcmp(settings, "lnd tunables") == 0)) {
settings = nla_next(settings, &rem3);
if (nla_type(settings) !=
LN_SCALAR_ATTR_LIST) {
GENL_SET_ERR_MSG(info,
"lnd tunables should be list\n");
GOTO(out, rc = -EINVAL);
}
if (info->nlhdr->nlmsg_flags & NLM_F_REPLACE &&
net_id == LNET_NET_ANY) {
struct lnet_net *net;
lnet_net_lock(LNET_LOCK_EX);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
struct lnet_ni *ni;
if (!net->net_lnd)
continue;
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (!nid_same(&nid, &LNET_ANY_NID) &&
!nid_same(&nid, &ni->ni_nid))
continue;
rc = lnet_genl_parse_lnd_tunables(settings,
&ni->ni_lnd_tunables,
net->net_lnd);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to parse lnd tunables");
lnet_net_unlock(LNET_LOCK_EX);
GOTO(out, rc);
}
}
}
lnet_net_unlock(LNET_LOCK_EX);
} else {
lnd = lnet_load_lnd(LNET_NETTYP(net_id));
if (IS_ERR(lnd)) {
GENL_SET_ERR_MSG(info,
"LND type not supported");
GOTO(out, rc = PTR_ERR(lnd));
}
rc = lnet_genl_parse_lnd_tunables(settings,
&tun->lt_tun, lnd);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to parse lnd tunables");
GOTO(out, rc);
}
}
} else if (nla_strcmp(settings, "CPT") == 0) {
struct nlattr *cpt;
int rem4;
settings = nla_next(settings, &rem3);
if (nla_type(settings) != LN_SCALAR_ATTR_LIST) {
GENL_SET_ERR_MSG(info,
"CPT should be list");
GOTO(out, rc = -EINVAL);
}
nla_for_each_nested(cpt, settings, rem4) {
s64 core;
if (nla_type(cpt) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"invalid CPT config");
GOTO(out, rc = -EINVAL);
}
core = nla_get_s64(cpt);
if (core >= LNET_CPT_NUMBER) {
GENL_SET_ERR_MSG(info,
"invalid CPT value");
GOTO(out, rc = -ERANGE);
}
conf->lic_cpts[conf->lic_ncpts] = core;
conf->lic_ncpts++;
}
}
}
if (info->nlhdr->nlmsg_flags & NLM_F_CREATE) {
if (nid_same(&nid, &LNET_ANY_NID) &&
!strlen(conf->lic_ni_intf)) {
GENL_SET_ERR_MSG(info,
"interface / NID is missing");
GOTO(out, rc);
}
rc = lnet_dyn_add_ni(conf, net_id, &nid, tun);
switch (rc) {
case -ENOENT:
GENL_SET_ERR_MSG(info,
"cannot parse net");
break;
case -ERANGE:
GENL_SET_ERR_MSG(info,
"invalid CPT set");
break;
case -ENOSPC:
GENL_SET_ERR_MSG(info,
"too many NIs, check lnet_interfaces_max");
break;
case 0:
break;
default:
GENL_SET_ERR_MSG(info,
"cannot add LNet NI");
}
} else if (info->nlhdr->nlmsg_flags & NLM_F_REPLACE && healthv != -1) {
lnet_ni_set_healthv(&nid, healthv);
rc = 0;
} else if (!(info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_REPLACE))) {
struct lnet_ni *ni;
/* delete case */
rc = -ENODEV;
if (!strlen(conf->lic_ni_intf) &&
nid_same(&nid, &LNET_ANY_NID)) {
GENL_SET_ERR_MSG(info,
"interface / NID is missing");
GOTO(out, rc);
}
if (nid_same(&nid, &LNET_ANY_NID)) {
struct lnet_net *net;
bool found = false;
lnet_net_lock(LNET_LOCK_EX);
net = lnet_get_net_locked(net_id);
if (!net) {
GENL_SET_ERR_MSG(info,
"LNet net doesn't exist");
lnet_net_unlock(LNET_LOCK_EX);
GOTO(out, rc);
}
list_for_each_entry(ni, &net->net_ni_list,
ni_netlist) {
if (!ni->ni_interface ||
strcmp(ni->ni_interface,
conf->lic_ni_intf) != 0)
continue;
found = true;
lnet_net_unlock(LNET_LOCK_EX);
rc = lnet_dyn_del_ni(&ni->ni_nid, false);
break;
}
if (rc < 0 && !found) { /* will be -ENODEV */
GENL_SET_ERR_MSG(info,
"interface invalid for deleting LNet NI");
lnet_net_unlock(LNET_LOCK_EX);
}
} else {
rc = lnet_dyn_del_ni(&nid, false);
}
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"cannot del LNet NI");
GOTO(out, rc);
}
}
out:
LIBCFS_FREE(tun, sizeof(struct lnet_ioctl_config_lnd_tunables));
return rc;
}
static int lnet_net_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
struct lnet_ioctl_config_ni *conf;
int msg_len, rem, rc = 0;
struct nlattr *attr;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
return -ENOMSG;
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
return -EINVAL;
}
CFS_ALLOC_PTR(conf);
if (!conf)
return -ENOMEM;
nla_for_each_nested(attr, params, rem) {
bool ni_list = false, ipnets = false;
u32 net_id = LNET_NET_ANY;
struct nlattr *entry;
int rem2;
if (nla_type(attr) != LN_SCALAR_ATTR_LIST)
continue;
nla_for_each_nested(entry, attr, rem2) {
switch (nla_type(entry)) {
case LN_SCALAR_ATTR_VALUE: {
ssize_t len;
memset(conf, 0, sizeof(*conf));
if (nla_strcmp(entry, "ip2net") == 0) {
entry = nla_next(entry, &rem2);
if (nla_type(entry) !=
LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"ip2net has invalid key");
GOTO(out, rc = -EINVAL);
}
len = nla_strscpy(conf->lic_legacy_ip2nets,
entry,
sizeof(conf->lic_legacy_ip2nets));
if (len < 0) {
GENL_SET_ERR_MSG(info,
"ip2net key string is invalid");
GOTO(out, rc = len);
}
ni_list = true;
ipnets = true;
} else if (nla_strcmp(entry, "net type") == 0) {
char tmp[LNET_NIDSTR_SIZE];
entry = nla_next(entry, &rem2);
if (nla_type(entry) !=
LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"net type has invalid key");
GOTO(out, rc = -EINVAL);
}
len = nla_strscpy(tmp, entry,
sizeof(tmp));
if (len < 0) {
GENL_SET_ERR_MSG(info,
"net type key string is invalid");
GOTO(out, rc = len);
}
net_id = libcfs_str2net(tmp);
if (!net_id) {
GENL_SET_ERR_MSG(info,
"cannot parse net");
GOTO(out, rc = -ENODEV);
}
if (LNET_NETTYP(net_id) == LOLND) {
GENL_SET_ERR_MSG(info,
"setting @lo not allowed");
GOTO(out, rc = -ENODEV);
}
conf->lic_legacy_ip2nets[0] = '\0';
conf->lic_ni_intf[0] = '\0';
ni_list = false;
}
if (rc < 0)
GOTO(out, rc);
break;
}
case LN_SCALAR_ATTR_LIST: {
struct nlattr *interface;
int rem3;
ipnets = false;
nla_for_each_nested(interface, entry, rem3) {
rc = lnet_genl_parse_local_ni(interface, info,
net_id, conf,
&ni_list);
if (rc < 0)
GOTO(out, rc);
}
break;
}
/* it is possible a newer version of the user land send
* values older kernels doesn't handle. So silently
* ignore these values
*/
default:
break;
}
}
/* Handle case of just sent NET with no list of NIDs */
if (!(info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_REPLACE)) &&
!ni_list) {
rc = lnet_dyn_del_net(net_id);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"cannot del network");
}
} else if ((info->nlhdr->nlmsg_flags & NLM_F_CREATE) &&
ipnets && ni_list) {
rc = lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
NULL);
if (rc < 0)
GENL_SET_ERR_MSG(info,
"cannot setup ip2nets");
}
}
out:
CFS_FREE_PTR(conf);
return rc;
}
/* Called with ln_api_mutex */
static int lnet_parse_peer_nis(struct nlattr *rlist, struct genl_info *info,
struct lnet_nid *pnid, bool mr,
bool *create_some)
{
struct lnet_nid snid = LNET_ANY_NID;
struct nlattr *props;
int rem, rc = 0;
s64 num = -1;
nla_for_each_nested(props, rlist, rem) {
if (nla_type(props) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(props, "nid") == 0) {
char nidstr[LNET_NIDSTR_SIZE];
props = nla_next(props, &rem);
if (nla_type(props) != LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"invalid secondary NID");
GOTO(report_err, rc = -EINVAL);
}
rc = nla_strscpy(nidstr, props, sizeof(nidstr));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to get secondary NID");
GOTO(report_err, rc);
}
rc = libcfs_strnid(&snid, strim(nidstr));
if (rc < 0) {
GENL_SET_ERR_MSG(info, "unsupported secondary NID");
GOTO(report_err, rc);
}
if (LNET_NID_IS_ANY(&snid) || nid_same(&snid, pnid))
*create_some = false;
} else if (nla_strcmp(props, "health stats") == 0) {
struct nlattr *health;
int rem2;
props = nla_next(props, &rem);
if (nla_type(props) !=
LN_SCALAR_ATTR_LIST) {
GENL_SET_ERR_MSG(info,
"invalid health configuration");
GOTO(report_err, rc = -EINVAL);
}
nla_for_each_nested(health, props, rem2) {
if (nla_type(health) != LN_SCALAR_ATTR_VALUE ||
nla_strcmp(health, "health value") != 0) {
GENL_SET_ERR_MSG(info,
"wrong health config format");
GOTO(report_err, rc = -EINVAL);
}
health = nla_next(health, &rem2);
if (nla_type(health) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"invalid health config format");
GOTO(report_err, rc = -EINVAL);
}
num = nla_get_s64(health);
clamp_t(s64, num, 0, LNET_MAX_HEALTH_VALUE);
}
}
}
if (info->nlhdr->nlmsg_flags & NLM_F_REPLACE && num != -1) {
lnet_peer_ni_set_healthv(pnid, num, !*create_some);
} else if (info->nlhdr->nlmsg_flags & NLM_F_CREATE) {
bool lock_prim = info->nlhdr->nlmsg_flags & NLM_F_EXCL;
rc = lnet_user_add_peer_ni(pnid, &snid, mr, lock_prim);
if (rc < 0)
GENL_SET_ERR_MSG(info,
"failed to add peer");
} else if (!(info->nlhdr->nlmsg_flags & NLM_F_CREATE) && *create_some) {
bool force = info->nlhdr->nlmsg_flags & NLM_F_EXCL;
rc = lnet_del_peer_ni(pnid, &snid, force);
if (rc < 0)
GENL_SET_ERR_MSG(info,
"failed to del peer");
}
report_err:
return rc;
}
static int lnet_peer_ni_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
int msg_len, rem, rc = 0;
struct lnet_nid pnid;
struct nlattr *attr;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
GENL_SET_ERR_MSG(info, "Network is down");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENETDOWN;
}
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOMSG;
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
mutex_unlock(&the_lnet.ln_api_mutex);
return -EINVAL;
}
nla_for_each_nested(attr, params, rem) {
bool parse_peer_nis = false;
struct nlattr *pnid_prop;
int rem2;
if (nla_type(attr) != LN_SCALAR_ATTR_LIST)
continue;
pnid = LNET_ANY_NID;
nla_for_each_nested(pnid_prop, attr, rem2) {
bool mr = true;
if (nla_type(pnid_prop) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(pnid_prop, "primary nid") == 0) {
char nidstr[LNET_NIDSTR_SIZE];
pnid_prop = nla_next(pnid_prop, &rem2);
if (nla_type(pnid_prop) !=
LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"invalid primary NID type");
GOTO(report_err, rc = -EINVAL);
}
rc = nla_strscpy(nidstr, pnid_prop,
sizeof(nidstr));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to get primary NID");
GOTO(report_err, rc);
}
rc = libcfs_strnid(&pnid, strim(nidstr));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"unsupported primary NID");
GOTO(report_err, rc);
}
/* we must create primary NID for peer ni
* creation
*/
if (info->nlhdr->nlmsg_flags & NLM_F_CREATE) {
bool lock_prim;
lock_prim = info->nlhdr->nlmsg_flags & NLM_F_EXCL;
rc = lnet_user_add_peer_ni(&pnid,
&LNET_ANY_NID,
true, lock_prim);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to add primary peer");
GOTO(report_err, rc);
}
}
} else if (nla_strcmp(pnid_prop, "Multi-Rail") == 0) {
pnid_prop = nla_next(pnid_prop, &rem2);
if (nla_type(pnid_prop) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"invalid MR flag param");
GOTO(report_err, rc = -EINVAL);
}
if (nla_get_s64(pnid_prop) == 0)
mr = false;
} else if (nla_strcmp(pnid_prop, "peer state") == 0) {
struct lnet_peer_ni *lpni;
struct lnet_peer *lp;
pnid_prop = nla_next(pnid_prop, &rem2);
if (nla_type(pnid_prop) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"invalid peer state param");
GOTO(report_err, rc = -EINVAL);
}
lpni = lnet_peer_ni_find_locked(&pnid);
if (!lpni) {
GENL_SET_ERR_MSG(info,
"invalid peer state param");
GOTO(report_err, rc = -ENOENT);
}
lnet_peer_ni_decref_locked(lpni);
lp = lpni->lpni_peer_net->lpn_peer;
lp->lp_state = nla_get_s64(pnid_prop);
} else if (nla_strcmp(pnid_prop, "peer ni") == 0) {
struct nlattr *rlist;
int rem3;
if (!(info->nlhdr->nlmsg_flags & NLM_F_REPLACE) &&
LNET_NID_IS_ANY(&pnid)) {
GENL_SET_ERR_MSG(info,
"missing required primary NID");
GOTO(report_err, rc);
}
pnid_prop = nla_next(pnid_prop, &rem2);
if (nla_type(pnid_prop) !=
LN_SCALAR_ATTR_LIST) {
GENL_SET_ERR_MSG(info,
"invalid NIDs list");
GOTO(report_err, rc = -EINVAL);
}
parse_peer_nis = true;
nla_for_each_nested(rlist, pnid_prop, rem3) {
rc = lnet_parse_peer_nis(rlist, info,
&pnid, mr,
&parse_peer_nis);
if (rc < 0)
GOTO(report_err, rc);
}
}
}
/* If we have remote peer ni's we already add /del peers */
if (parse_peer_nis)
continue;
if (LNET_NID_IS_ANY(&pnid)) {
GENL_SET_ERR_MSG(info, "missing primary NID");
GOTO(report_err, rc);
}
if (!(info->nlhdr->nlmsg_flags & NLM_F_CREATE)) {
bool force = info->nlhdr->nlmsg_flags & NLM_F_EXCL;
rc = lnet_del_peer_ni(&pnid, &LNET_ANY_NID,
force);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to del primary peer");
GOTO(report_err, rc);
}
}
}
report_err:
/* If we failed on creation and encounter a latter error then
* delete the primary nid.
*/
if (rc < 0 && info->nlhdr->nlmsg_flags & NLM_F_CREATE &&
!LNET_NID_IS_ANY(&pnid))
lnet_del_peer_ni(&pnid, &LNET_ANY_NID,
info->nlhdr->nlmsg_flags & NLM_F_EXCL);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
/** LNet route handling */
/* We can't use struct lnet_ioctl_config_data since it lacks
* support for large NIDS
*/
struct lnet_route_properties {
struct lnet_nid lrp_gateway;
u32 lrp_net;
s32 lrp_hop;
u32 lrp_flags;
u32 lrp_priority;
};
struct lnet_genl_route_list {
unsigned int lgrl_index;
unsigned int lgrl_count;
GENRADIX(struct lnet_route_properties) lgrl_list;
};
static inline struct lnet_genl_route_list *
lnet_route_dump_ctx(struct netlink_callback *cb)
{
return (struct lnet_genl_route_list *)cb->args[0];
}
static int lnet_route_show_done(struct netlink_callback *cb)
{
struct lnet_genl_route_list *rlist = lnet_route_dump_ctx(cb);
if (rlist) {
genradix_free(&rlist->lgrl_list);
CFS_FREE_PTR(rlist);
}
cb->args[0] = 0;
return 0;
}
static int lnet_scan_route(struct lnet_genl_route_list *rlist,
struct lnet_route_properties *settings)
{
struct lnet_remotenet *rnet;
struct list_head *rn_list;
struct lnet_route *route;
int cpt, i, rc = 0;
cpt = lnet_net_lock_current();
for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) {
rn_list = &the_lnet.ln_remote_nets_hash[i];
list_for_each_entry(rnet, rn_list, lrn_list) {
if (settings->lrp_net != LNET_NET_ANY &&
settings->lrp_net != rnet->lrn_net)
continue;
list_for_each_entry(route, &rnet->lrn_routes,
lr_list) {
struct lnet_route_properties *prop;
if (!LNET_NID_IS_ANY(&settings->lrp_gateway) &&
!nid_same(&settings->lrp_gateway,
&route->lr_nid)) {
continue;
}
if (settings->lrp_hop != -1 &&
settings->lrp_hop != route->lr_hops)
continue;
if (settings->lrp_priority != -1 &&
settings->lrp_priority != route->lr_priority)
continue;
prop = genradix_ptr_alloc(&rlist->lgrl_list,
rlist->lgrl_count++,
GFP_ATOMIC);
if (!prop)
GOTO(failed_alloc, rc = -ENOMEM);
prop->lrp_net = rnet->lrn_net;
prop->lrp_gateway = route->lr_nid;
prop->lrp_hop = route->lr_hops;
prop->lrp_priority = route->lr_priority;
if (lnet_is_route_alive(route))
prop->lrp_flags |= LNET_RT_ALIVE;
else
prop->lrp_flags &= ~LNET_RT_ALIVE;
if (route->lr_single_hop)
prop->lrp_flags &= ~LNET_RT_MULTI_HOP;
else
prop->lrp_flags |= LNET_RT_MULTI_HOP;
}
}
}
failed_alloc:
lnet_net_unlock(cpt);
return rc;
}
/* Size of the message send by lnet_genl_send_scalar_list().
* Length is from genlmsg_len() on the msg created.
*/
#define ROUTER_MSG_MIN_SIZE 284
/* For 'value' packet it contains
* net LNET_NIDSTR_SIZE
* gateway LNET_NIDSTR_SIZE
* hop u32
* priority u32
* health sensit.. u32
* state "down" largest string (5)
* type "single-hop" largest string (10)
*/
#define ROUTER_MSG_VALUES_SIZE (LNET_NIDSTR_SIZE * 2 + 27)
/* LNet route ->start() handler for GET requests */
static int lnet_route_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
unsigned long len = ROUTER_MSG_MIN_SIZE;
struct lnet_genl_route_list *rlist;
int msg_len = genlmsg_len(gnlh);
int rc = 0;
if (the_lnet.ln_refcount == 0 ||
the_lnet.ln_state != LNET_STATE_RUNNING) {
NL_SET_ERR_MSG(extack, "Network is down");
return -ENETDOWN;
}
CFS_ALLOC_PTR(rlist);
if (!rlist) {
NL_SET_ERR_MSG(extack, "No memory for route list");
return -ENOMEM;
}
genradix_init(&rlist->lgrl_list);
rlist->lgrl_count = 0;
rlist->lgrl_index = 0;
cb->args[0] = (long)rlist;
mutex_lock(&the_lnet.ln_api_mutex);
if (!msg_len) {
struct lnet_route_properties tmp = {
.lrp_gateway = LNET_ANY_NID,
.lrp_net = LNET_NET_ANY,
.lrp_hop = -1,
.lrp_priority = -1,
};
rc = lnet_scan_route(rlist, &tmp);
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to allocate router data");
GOTO(report_err, rc);
}
} else {
struct nlattr *params = genlmsg_data(gnlh);
struct nlattr *attr;
int rem;
nla_for_each_nested(attr, params, rem) {
struct lnet_route_properties tmp = {
.lrp_gateway = LNET_ANY_NID,
.lrp_net = LNET_NET_ANY,
.lrp_hop = -1,
.lrp_priority = -1,
};
struct nlattr *route;
int rem2;
if (nla_type(attr) != LN_SCALAR_ATTR_LIST)
continue;
nla_for_each_nested(route, attr, rem2) {
if (nla_type(route) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(route, "net") == 0) {
char nw[LNET_NIDSTR_SIZE];
route = nla_next(route, &rem2);
if (nla_type(route) !=
LN_SCALAR_ATTR_VALUE) {
NL_SET_ERR_MSG(extack,
"invalid net param");
GOTO(report_err, rc = -EINVAL);
}
rc = nla_strscpy(nw, route, sizeof(nw));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to get route param");
GOTO(report_err, rc);
}
rc = 0;
tmp.lrp_net = libcfs_str2net(strim(nw));
} else if (nla_strcmp(route, "gateway") == 0) {
char gw[LNET_NIDSTR_SIZE];
route = nla_next(route, &rem2);
if (nla_type(route) !=
LN_SCALAR_ATTR_VALUE) {
NL_SET_ERR_MSG(extack,
"invalid gateway param");
GOTO(report_err, rc = -EINVAL);
}
rc = nla_strscpy(gw, route, sizeof(gw));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to get route param");
GOTO(report_err, rc);
}
rc = libcfs_strnid(&tmp.lrp_gateway, strim(gw));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"cannot parse gateway");
GOTO(report_err, rc = -ENODEV);
}
rc = 0;
} else if (nla_strcmp(route, "hop") == 0) {
route = nla_next(route, &rem2);
if (nla_type(route) !=
LN_SCALAR_ATTR_INT_VALUE) {
NL_SET_ERR_MSG(extack,
"invalid hop param");
GOTO(report_err, rc = -EINVAL);
}
tmp.lrp_hop = nla_get_s64(route);
if (tmp.lrp_hop != -1)
clamp_t(s32, tmp.lrp_hop, 1, 127);
} else if (nla_strcmp(route, "priority") == 0) {
route = nla_next(route, &rem2);
if (nla_type(route) !=
LN_SCALAR_ATTR_INT_VALUE) {
NL_SET_ERR_MSG(extack,
"invalid priority param");
GOTO(report_err, rc = -EINVAL);
}
tmp.lrp_priority = nla_get_s64(route);
}
}
rc = lnet_scan_route(rlist, &tmp);
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to allocate router data");
GOTO(report_err, rc);
}
}
}
len += ROUTER_MSG_VALUES_SIZE * rlist->lgrl_count;
if (len > BIT(sizeof(cb->min_dump_alloc) << 3)) {
NL_SET_ERR_MSG(extack, "Netlink msg is too large");
rc = -EMSGSIZE;
} else {
cb->min_dump_alloc = len;
}
report_err:
mutex_unlock(&the_lnet.ln_api_mutex);
if (rc < 0)
lnet_route_show_done(cb);
return rc;
}
static const struct ln_key_list route_props_list = {
.lkl_maxattr = LNET_ROUTE_ATTR_MAX,
.lkl_list = {
[LNET_ROUTE_ATTR_HDR] = {
.lkp_value = "route",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_ROUTE_ATTR_NET] = {
.lkp_value = "net",
.lkp_data_type = NLA_STRING
},
[LNET_ROUTE_ATTR_GATEWAY] = {
.lkp_value = "gateway",
.lkp_data_type = NLA_STRING
},
[LNET_ROUTE_ATTR_HOP] = {
.lkp_value = "hop",
.lkp_data_type = NLA_S32
},
[LNET_ROUTE_ATTR_PRIORITY] = {
.lkp_value = "priority",
.lkp_data_type = NLA_U32
},
[LNET_ROUTE_ATTR_HEALTH_SENSITIVITY] = {
.lkp_value = "health_sensitivity",
.lkp_data_type = NLA_U32
},
[LNET_ROUTE_ATTR_STATE] = {
.lkp_value = "state",
.lkp_data_type = NLA_STRING,
},
[LNET_ROUTE_ATTR_TYPE] = {
.lkp_value = "type",
.lkp_data_type = NLA_STRING,
},
},
};
static int lnet_route_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_route_list *rlist = lnet_route_dump_ctx(cb);
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
int seq = cb->nlh->nlmsg_seq;
int idx = rlist->lgrl_index;
int msg_len = genlmsg_len(gnlh);
int rc = 0;
if (!rlist->lgrl_count) {
NL_SET_ERR_MSG(extack, "No routes found");
GOTO(send_error, rc = msg_len ? -ENOENT : 0);
}
if (!idx) {
const struct ln_key_list *all[] = {
&route_props_list, NULL
};
rc = lnet_genl_send_scalar_list(msg, portid, seq,
&lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_ROUTES, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(send_error, rc);
}
}
while (idx < rlist->lgrl_count) {
struct lnet_route_properties *prop;
void *hdr;
prop = genradix_ptr(&rlist->lgrl_list, idx++);
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_ROUTES);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
genlmsg_cancel(msg, hdr);
GOTO(send_error, rc = -EMSGSIZE);
}
if (idx == 1)
nla_put_string(msg, LNET_ROUTE_ATTR_HDR, "");
nla_put_string(msg, LNET_ROUTE_ATTR_NET,
libcfs_net2str(prop->lrp_net));
nla_put_string(msg, LNET_ROUTE_ATTR_GATEWAY,
libcfs_nidstr(&prop->lrp_gateway));
if (gnlh->version) {
nla_put_s32(msg, LNET_ROUTE_ATTR_HOP, prop->lrp_hop);
nla_put_u32(msg, LNET_ROUTE_ATTR_PRIORITY, prop->lrp_priority);
if (!(cb->nlh->nlmsg_flags & NLM_F_DUMP_FILTERED)) {
nla_put_string(msg, LNET_ROUTE_ATTR_STATE,
prop->lrp_flags & LNET_RT_ALIVE ?
"up" : "down");
nla_put_string(msg, LNET_ROUTE_ATTR_TYPE,
prop->lrp_flags & LNET_RT_MULTI_HOP ?
"multi-hop" : "single-hop");
}
}
genlmsg_end(msg, hdr);
}
rlist->lgrl_index = idx;
send_error:
return rc;
};
/** LNet peer handling */
struct lnet_genl_processid_list {
unsigned int lgpl_index;
unsigned int lgpl_count;
GENRADIX(struct lnet_processid) lgpl_list;
};
static inline struct lnet_genl_processid_list *
lnet_peer_dump_ctx(struct netlink_callback *cb)
{
return (struct lnet_genl_processid_list *)cb->args[0];
}
static int lnet_peer_ni_show_done(struct netlink_callback *cb)
{
struct lnet_genl_processid_list *plist = lnet_peer_dump_ctx(cb);
if (plist) {
genradix_free(&plist->lgpl_list);
CFS_FREE_PTR(plist);
}
cb->args[0] = 0;
return 0;
}
/* LNet peer ->start() handler for GET requests */
static int lnet_peer_ni_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
struct lnet_genl_processid_list *plist;
int msg_len = genlmsg_len(gnlh);
int rc = 0;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
NL_SET_ERR_MSG(extack, "Network is down");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENETDOWN;
}
CFS_ALLOC_PTR(plist);
if (!plist) {
NL_SET_ERR_MSG(extack, "No memory for peer list");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOMEM;
}
genradix_init(&plist->lgpl_list);
plist->lgpl_count = 0;
plist->lgpl_index = 0;
cb->args[0] = (long)plist;
if (!msg_len) {
struct lnet_peer_table *ptable;
int cpt;
cfs_percpt_for_each(ptable, cpt, the_lnet.ln_peer_tables) {
struct lnet_peer *lp;
list_for_each_entry(lp, &ptable->pt_peer_list,
lp_peer_list) {
struct lnet_processid *lpi;
lpi = genradix_ptr_alloc(&plist->lgpl_list,
plist->lgpl_count++,
GFP_KERNEL);
if (!lpi) {
NL_SET_ERR_MSG(extack,
"failed to allocate NID");
GOTO(report_err, rc = -ENOMEM);
}
lpi->pid = LNET_PID_LUSTRE;
lpi->nid = lp->lp_primary_nid;
}
}
} else {
struct nlattr *params = genlmsg_data(gnlh);
struct nlattr *attr;
int rem;
nla_for_each_nested(attr, params, rem) {
struct nlattr *nid;
int rem2;
if (nla_type(attr) != LN_SCALAR_ATTR_LIST)
continue;
nla_for_each_nested(nid, attr, rem2) {
char addr[LNET_NIDSTR_SIZE];
struct lnet_processid *id;
if (nla_type(nid) != LN_SCALAR_ATTR_VALUE ||
nla_strcmp(nid, "primary nid") != 0)
continue;
nid = nla_next(nid, &rem2);
if (nla_type(nid) != LN_SCALAR_ATTR_VALUE) {
NL_SET_ERR_MSG(extack,
"invalid primary nid param");
GOTO(report_err, rc = -EINVAL);
}
rc = nla_strscpy(addr, nid, sizeof(addr));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to get primary nid param");
GOTO(report_err, rc);
}
id = genradix_ptr_alloc(&plist->lgpl_list,
plist->lgpl_count++,
GFP_KERNEL);
if (!id) {
NL_SET_ERR_MSG(extack, "failed to allocate NID");
GOTO(report_err, rc = -ENOMEM);
}
rc = libcfs_strid(id, strim(addr));
if (rc < 0) {
NL_SET_ERR_MSG(extack, "invalid NID");
GOTO(report_err, rc);
}
rc = 0;
}
}
}
report_err:
mutex_unlock(&the_lnet.ln_api_mutex);
if (rc < 0)
lnet_peer_ni_show_done(cb);
return rc;
}
static const struct ln_key_list lnet_peer_ni_keys = {
.lkl_maxattr = LNET_PEER_NI_ATTR_MAX,
.lkl_list = {
[LNET_PEER_NI_ATTR_HDR] = {
.lkp_value = "peer",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_PEER_NI_ATTR_PRIMARY_NID] = {
.lkp_value = "primary nid",
.lkp_data_type = NLA_STRING,
},
[LNET_PEER_NI_ATTR_MULTIRAIL] = {
.lkp_value = "Multi-Rail",
.lkp_data_type = NLA_FLAG
},
[LNET_PEER_NI_ATTR_STATE] = {
.lkp_value = "peer state",
.lkp_data_type = NLA_U32
},
[LNET_PEER_NI_ATTR_PEER_NI_LIST] = {
.lkp_value = "peer ni",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NESTED,
},
},
};
static const struct ln_key_list lnet_peer_ni_list = {
.lkl_maxattr = LNET_PEER_NI_LIST_ATTR_MAX,
.lkl_list = {
[LNET_PEER_NI_LIST_ATTR_NID] = {
.lkp_value = "nid",
.lkp_data_type = NLA_STRING,
},
[LNET_PEER_NI_LIST_ATTR_UDSP_INFO] = {
.lkp_value = "udsp info",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED,
},
[LNET_PEER_NI_LIST_ATTR_STATE] = {
.lkp_value = "state",
.lkp_data_type = NLA_STRING,
},
[LNET_PEER_NI_LIST_ATTR_MAX_TX_CREDITS] = {
.lkp_value = "max_ni_tx_credits",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_ATTR_CUR_TX_CREDITS] = {
.lkp_value = "available_tx_credits",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_ATTR_MIN_TX_CREDITS] = {
.lkp_value = "min_tx_credits",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_ATTR_QUEUE_BUF_COUNT] = {
.lkp_value = "tx_q_num_of_buf",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_ATTR_CUR_RTR_CREDITS] = {
.lkp_value = "available_rtr_credits",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_ATTR_MIN_RTR_CREDITS] = {
.lkp_value = "min_rtr_credits",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_ATTR_REFCOUNT] = {
.lkp_value = "refcount",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_ATTR_STATS_COUNT] = {
.lkp_value = "statistics",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_PEER_NI_LIST_ATTR_SENT_STATS] = {
.lkp_value = "sent_stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_PEER_NI_LIST_ATTR_RECV_STATS] = {
.lkp_value = "received_stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_PEER_NI_LIST_ATTR_DROP_STATS] = {
.lkp_value = "dropped_stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
[LNET_PEER_NI_LIST_ATTR_HEALTH_STATS] = {
.lkp_value = "health stats",
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
},
};
static const struct ln_key_list lnet_peer_ni_list_stats_count = {
.lkl_maxattr = LNET_PEER_NI_LIST_STATS_COUNT_ATTR_MAX,
.lkl_list = {
[LNET_PEER_NI_LIST_STATS_COUNT_ATTR_SEND_COUNT] = {
.lkp_value = "send_count",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_STATS_COUNT_ATTR_RECV_COUNT] = {
.lkp_value = "recv_count",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_STATS_COUNT_ATTR_DROP_COUNT] = {
.lkp_value = "drop_count",
.lkp_data_type = NLA_U32,
},
},
};
static const struct ln_key_list lnet_peer_ni_list_stats = {
.lkl_maxattr = LNET_PEER_NI_LIST_STATS_ATTR_MAX,
.lkl_list = {
[LNET_PEER_NI_LIST_STATS_ATTR_PUT] = {
.lkp_value = "put",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_STATS_ATTR_GET] = {
.lkp_value = "get",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_STATS_ATTR_REPLY] = {
.lkp_value = "reply",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_STATS_ATTR_ACK] = {
.lkp_value = "ack",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_STATS_ATTR_HELLO] = {
.lkp_value = "hello",
.lkp_data_type = NLA_U32,
},
},
};
static const struct ln_key_list lnet_peer_ni_list_health = {
.lkl_maxattr = LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_MAX,
.lkl_list = {
[LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_VALUE] = {
.lkp_value = "health value",
.lkp_data_type = NLA_S32,
},
[LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_DROPPED] = {
.lkp_value = "dropped",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_TIMEOUT] = {
.lkp_value = "timeout",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_ERROR] = {
.lkp_value = "error",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_NETWORK_TIMEOUT] = {
.lkp_value = "network timeout",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_PING_COUNT] = {
.lkp_value = "ping_count",
.lkp_data_type = NLA_U32,
},
[LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_NEXT_PING] = {
.lkp_value = "next_ping",
.lkp_data_type = NLA_S64,
},
},
};
static int lnet_peer_ni_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_processid_list *plist = lnet_peer_dump_ctx(cb);
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
int seq = cb->nlh->nlmsg_seq;
int idx = plist->lgpl_index;
int msg_len = genlmsg_len(gnlh);
int rc = 0;
if (!plist->lgpl_count) {
NL_SET_ERR_MSG(extack, "No peers found");
GOTO(send_error, rc = msg_len ? -ENOENT : 0);
}
if (!idx) {
const struct ln_key_list *all[] = {
&lnet_peer_ni_keys, &lnet_peer_ni_list,
&udsp_info_list, &udsp_info_pref_nids_list,
&udsp_info_pref_nids_list,
&lnet_peer_ni_list_stats_count,
&lnet_peer_ni_list_stats, /* send_stats */
&lnet_peer_ni_list_stats, /* recv_stats */
&lnet_peer_ni_list_stats, /* drop stats */
&lnet_peer_ni_list_health,
NULL
};
rc = lnet_genl_send_scalar_list(msg, portid, seq,
&lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_PEERS, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(send_error, rc);
}
}
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
NL_SET_ERR_MSG(extack, "Network is down");
GOTO(unlock_api_mutex, rc = -ENETDOWN);
}
while (idx < plist->lgpl_count) {
struct lnet_processid *id;
struct lnet_peer_ni *lpni = NULL;
struct nlattr *nid_list;
struct lnet_peer *lp;
unsigned int state;
int count = 1;
void *hdr;
id = genradix_ptr(&plist->lgpl_list, idx++);
if (nid_is_lo0(&id->nid))
continue;
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_PEERS);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
genlmsg_cancel(msg, hdr);
GOTO(unlock_api_mutex, rc = -EMSGSIZE);
}
lp = lnet_find_peer(&id->nid);
if (!lp) {
NL_SET_ERR_MSG(extack, "cannot find peer");
GOTO(unlock_api_mutex, rc = -ENOENT);
}
if (idx == 1)
nla_put_string(msg, LNET_PEER_NI_ATTR_HDR, "");
nla_put_string(msg, LNET_PEER_NI_ATTR_PRIMARY_NID,
libcfs_nidstr(&lp->lp_primary_nid));
if (lnet_peer_is_multi_rail(lp))
nla_put_flag(msg, LNET_PEER_NI_ATTR_MULTIRAIL);
if (gnlh->version >= 3) {
spin_lock(&lp->lp_lock);
state = lp->lp_state;
spin_unlock(&lp->lp_lock);
/* add (peer state)lp_state to @msg */
nla_put_u32(msg, LNET_PEER_NI_ATTR_STATE, state);
}
nid_list = nla_nest_start(msg, LNET_PEER_NI_ATTR_PEER_NI_LIST);
while ((lpni = lnet_get_next_peer_ni_locked(lp, NULL, lpni)) != NULL) {
struct nlattr *peer_nid = nla_nest_start(msg, count++);
nla_put_string(msg, LNET_PEER_NI_LIST_ATTR_NID,
libcfs_nidstr(&lpni->lpni_nid));
if (gnlh->version >= 4) {
rc = lnet_udsp_info_send(msg,
LNET_PEER_NI_LIST_ATTR_UDSP_INFO,
&lpni->lpni_nid, true);
if (rc < 0) {
lnet_peer_decref_locked(lp);
NL_SET_ERR_MSG(extack,
"failed to get UDSP info");
GOTO(unlock_api_mutex, rc);
}
}
if (cb->nlh->nlmsg_flags & NLM_F_DUMP_FILTERED)
goto skip_state;
if (lnet_isrouter(lpni) ||
lnet_peer_aliveness_enabled(lpni)) {
nla_put_string(msg, LNET_PEER_NI_LIST_ATTR_STATE,
lnet_is_peer_ni_alive(lpni) ?
"up" : "down");
} else {
nla_put_string(msg, LNET_PEER_NI_LIST_ATTR_STATE,
"NA");
}
skip_state:
if (gnlh->version) {
struct lnet_ioctl_element_msg_stats lpni_msg_stats;
struct nlattr *send_stats_list, *send_stats;
struct nlattr *recv_stats_list, *recv_stats;
struct nlattr *drop_stats_list, *drop_stats;
struct nlattr *health_list, *health_stats;
struct lnet_ioctl_element_stats stats;
struct nlattr *stats_attr, *ni_stats;
nla_put_u32(msg,
LNET_PEER_NI_LIST_ATTR_MAX_TX_CREDITS,
lpni->lpni_net ?
lpni->lpni_net->net_tunables.lct_peer_tx_credits : 0);
nla_put_u32(msg,
LNET_PEER_NI_LIST_ATTR_CUR_TX_CREDITS,
lpni->lpni_txcredits);
nla_put_u32(msg,
LNET_PEER_NI_LIST_ATTR_MIN_TX_CREDITS,
lpni->lpni_mintxcredits);
nla_put_u32(msg,
LNET_PEER_NI_LIST_ATTR_QUEUE_BUF_COUNT,
lpni->lpni_txqnob);
nla_put_u32(msg,
LNET_PEER_NI_LIST_ATTR_CUR_RTR_CREDITS,
lpni->lpni_rtrcredits);
nla_put_u32(msg,
LNET_PEER_NI_LIST_ATTR_MIN_RTR_CREDITS,
lpni->lpni_minrtrcredits);
nla_put_u32(msg,
LNET_PEER_NI_LIST_ATTR_REFCOUNT,
kref_read(&lpni->lpni_kref));
memset(&stats, 0, sizeof(stats));
stats.iel_send_count = lnet_sum_stats(&lpni->lpni_stats,
LNET_STATS_TYPE_SEND);
stats.iel_recv_count = lnet_sum_stats(&lpni->lpni_stats,
LNET_STATS_TYPE_RECV);
stats.iel_drop_count = lnet_sum_stats(&lpni->lpni_stats,
LNET_STATS_TYPE_DROP);
stats_attr = nla_nest_start(msg,
LNET_PEER_NI_LIST_ATTR_STATS_COUNT);
ni_stats = nla_nest_start(msg, 0);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_COUNT_ATTR_SEND_COUNT,
stats.iel_send_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_COUNT_ATTR_RECV_COUNT,
stats.iel_recv_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_COUNT_ATTR_DROP_COUNT,
stats.iel_drop_count);
nla_nest_end(msg, ni_stats);
nla_nest_end(msg, stats_attr);
if (gnlh->version < 2)
goto skip_msg_stats;
lnet_usr_translate_stats(&lpni_msg_stats, &lpni->lpni_stats);
send_stats_list = nla_nest_start(msg,
LNET_PEER_NI_LIST_ATTR_SENT_STATS);
send_stats = nla_nest_start(msg, 0);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_PUT,
lpni_msg_stats.im_send_stats.ico_put_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_GET,
lpni_msg_stats.im_send_stats.ico_get_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_REPLY,
lpni_msg_stats.im_send_stats.ico_reply_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_ACK,
lpni_msg_stats.im_send_stats.ico_ack_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_HELLO,
lpni_msg_stats.im_send_stats.ico_hello_count);
nla_nest_end(msg, send_stats);
nla_nest_end(msg, send_stats_list);
recv_stats_list = nla_nest_start(msg,
LNET_PEER_NI_LIST_ATTR_RECV_STATS);
recv_stats = nla_nest_start(msg, 0);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_PUT,
lpni_msg_stats.im_recv_stats.ico_put_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_GET,
lpni_msg_stats.im_recv_stats.ico_get_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_REPLY,
lpni_msg_stats.im_recv_stats.ico_reply_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_ACK,
lpni_msg_stats.im_recv_stats.ico_ack_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_HELLO,
lpni_msg_stats.im_recv_stats.ico_hello_count);
nla_nest_end(msg, recv_stats);
nla_nest_end(msg, recv_stats_list);
drop_stats_list = nla_nest_start(msg,
LNET_PEER_NI_LIST_ATTR_DROP_STATS);
drop_stats = nla_nest_start(msg, 0);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_PUT,
lpni_msg_stats.im_drop_stats.ico_put_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_GET,
lpni_msg_stats.im_drop_stats.ico_get_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_REPLY,
lpni_msg_stats.im_drop_stats.ico_reply_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_ACK,
lpni_msg_stats.im_drop_stats.ico_ack_count);
nla_put_u32(msg,
LNET_PEER_NI_LIST_STATS_ATTR_HELLO,
lpni_msg_stats.im_drop_stats.ico_hello_count);
nla_nest_end(msg, drop_stats);
nla_nest_end(msg, drop_stats_list);
health_list = nla_nest_start(msg,
LNET_PEER_NI_LIST_ATTR_HEALTH_STATS);
health_stats = nla_nest_start(msg, 0);
nla_put_s32(msg,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_VALUE,
atomic_read(&lpni->lpni_healthv));
nla_put_u32(msg,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_DROPPED,
atomic_read(&lpni->lpni_hstats.hlt_remote_dropped));
nla_put_u32(msg,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_TIMEOUT,
atomic_read(&lpni->lpni_hstats.hlt_remote_timeout));
nla_put_u32(msg,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_ERROR,
atomic_read(&lpni->lpni_hstats.hlt_remote_error));
nla_put_u32(msg,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_NETWORK_TIMEOUT,
atomic_read(&lpni->lpni_hstats.hlt_network_timeout));
nla_put_u32(msg,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_PING_COUNT,
lpni->lpni_ping_count);
nla_put_s64(msg,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_NEXT_PING,
lpni->lpni_next_ping,
LNET_PEER_NI_LIST_HEALTH_STATS_ATTR_PAD);
nla_nest_end(msg, health_stats);
nla_nest_end(msg, health_list);
}
skip_msg_stats:
nla_nest_end(msg, peer_nid);
}
nla_nest_end(msg, nid_list);
genlmsg_end(msg, hdr);
lnet_peer_decref_locked(lp);
}
plist->lgpl_index = idx;
unlock_api_mutex:
mutex_unlock(&the_lnet.ln_api_mutex);
send_error:
return rc;
};
static int lnet_route_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
int msg_len, rem, rc = 0;
struct nlattr *attr;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
GENL_SET_ERR_MSG(info, "Network is down");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENETDOWN;
}
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOMSG;
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
mutex_unlock(&the_lnet.ln_api_mutex);
return -EINVAL;
}
nla_for_each_nested(attr, params, rem) {
u32 net_id = LNET_NET_ANY, hops = LNET_UNDEFINED_HOPS;
u32 priority = 0;
struct lnet_nid gw_nid = LNET_ANY_NID;
struct nlattr *route_prop;
bool alive = true;
s64 when = 0;
int rem2;
if (nla_type(attr) != LN_SCALAR_ATTR_LIST)
continue;
nla_for_each_nested(route_prop, attr, rem2) {
char tmp[LNET_NIDSTR_SIZE];
ssize_t len;
s64 num;
if (nla_type(route_prop) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(route_prop, "net") == 0) {
route_prop = nla_next(route_prop, &rem2);
if (nla_type(route_prop) !=
LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"net is invalid key");
GOTO(report_err, rc = -EINVAL);
}
len = nla_strscpy(tmp, route_prop, sizeof(tmp));
if (len < 0) {
GENL_SET_ERR_MSG(info,
"net key string is invalid");
GOTO(report_err, rc = len);
}
net_id = libcfs_str2net(tmp);
if (!net_id) {
GENL_SET_ERR_MSG(info,
"cannot parse remote net");
GOTO(report_err, rc = -ENODEV);
}
if (LNET_NETTYP(net_id) == LOLND) {
GENL_SET_ERR_MSG(info,
"setting @lo not allowed");
GOTO(report_err, rc = -EACCES);
}
if (net_id == LNET_NET_ANY) {
GENL_SET_ERR_MSG(info,
"setting LNET_NET_ANY not allowed");
GOTO(report_err, rc = -ENXIO);
}
} else if (nla_strcmp(route_prop, "gateway") == 0) {
route_prop = nla_next(route_prop, &rem2);
if (nla_type(route_prop) !=
LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"gateway is invalid key");
GOTO(report_err, rc = -EINVAL);
}
len = nla_strscpy(tmp, route_prop, sizeof(tmp));
if (len < 0) {
GENL_SET_ERR_MSG(info,
"gateway string is invalid");
GOTO(report_err, rc = len);
}
rc = libcfs_strnid(&gw_nid, strim(tmp));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"cannot parse gateway");
GOTO(report_err, rc = -ENODEV);
}
} else if (nla_strcmp(route_prop, "state") == 0) {
route_prop = nla_next(route_prop, &rem2);
if (nla_type(route_prop) !=
LN_SCALAR_ATTR_VALUE) {
GENL_SET_ERR_MSG(info,
"state is invalid key");
GOTO(report_err, rc = -EINVAL);
}
if (nla_strcmp(route_prop, "down") == 0) {
alive = false;
} else if (nla_strcmp(route_prop, "up") == 0) {
alive = true;
} else {
GENL_SET_ERR_MSG(info,
"status string bad value");
GOTO(report_err, rc = -EINVAL);
}
} else if (nla_strcmp(route_prop, "notify_time") == 0) {
route_prop = nla_next(route_prop, &rem2);
if (nla_type(route_prop) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"notify_time is invalid key");
GOTO(report_err, rc = -EINVAL);
}
when = nla_get_s64(route_prop);
if (ktime_get_real_seconds() < when) {
GENL_SET_ERR_MSG(info,
"notify_time is in the future");
GOTO(report_err, rc = -EINVAL);
}
} else if (nla_strcmp(route_prop, "hop") == 0) {
route_prop = nla_next(route_prop, &rem2);
if (nla_type(route_prop) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"hop has invalid key");
GOTO(report_err, rc = -EINVAL);
}
hops = nla_get_s64(route_prop);
if ((hops < 1 || hops > 255) && hops != -1) {
GENL_SET_ERR_MSG(info,
"invalid hop count must be between 1 and 255");
GOTO(report_err, rc = -EINVAL);
}
} else if (nla_strcmp(route_prop, "priority") == 0) {
route_prop = nla_next(route_prop, &rem2);
if (nla_type(route_prop) !=
LN_SCALAR_ATTR_INT_VALUE) {
GENL_SET_ERR_MSG(info,
"priority has invalid key");
GOTO(report_err, rc = -EINVAL);
}
num = nla_get_s64(route_prop);
if (num < 0) {
GENL_SET_ERR_MSG(info,
"invalid priority, must not be negative");
GOTO(report_err, rc = -EINVAL);
}
priority = num;
}
}
if (net_id == LNET_NET_ANY) {
GENL_SET_ERR_MSG(info,
"missing mandatory parameter: network");
GOTO(report_err, rc = -ENODEV);
}
if (LNET_NID_IS_ANY(&gw_nid)) {
GENL_SET_ERR_MSG(info,
"missing mandatory parameter: gateway");
GOTO(report_err, rc = -ENODEV);
}
if (info->nlhdr->nlmsg_flags & NLM_F_REPLACE) {
/* Convert the user-supplied real time to monotonic.
* NB: "when" is always in the past
*/
when = ktime_get_seconds() -
(ktime_get_real_seconds() - when);
mutex_unlock(&the_lnet.ln_api_mutex);
rc = lnet_notify(NULL, &gw_nid, alive, false, when);
mutex_lock(&the_lnet.ln_api_mutex);
if (rc < 0)
GOTO(report_err, rc);
else if (the_lnet.ln_state != LNET_STATE_RUNNING)
GOTO(report_err, rc = -ENETDOWN);
} else if (info->nlhdr->nlmsg_flags & NLM_F_CREATE) {
rc = lnet_add_route(net_id, hops, &gw_nid, priority);
if (rc < 0) {
switch (rc) {
case -EINVAL:
GENL_SET_ERR_MSG(info,
"invalid settings for route creation");
break;
case -EHOSTUNREACH:
GENL_SET_ERR_MSG(info,
"No interface configured on the same net as gateway");
break;
case -ESHUTDOWN:
GENL_SET_ERR_MSG(info,
"Network is down");
break;
case -EEXIST:
GENL_SET_ERR_MSG(info,
"Route already exists or the specified network is local");
break;
default:
GENL_SET_ERR_MSG(info,
"failed to create route");
break;
}
GOTO(report_err, rc);
}
} else if (!(info->nlhdr->nlmsg_flags & NLM_F_CREATE)) {
rc = lnet_del_route(net_id, &gw_nid);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to delete route");
GOTO(report_err, rc);
}
}
}
report_err:
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
static inline struct lnet_genl_ping_list *
lnet_ping_dump_ctx(struct netlink_callback *cb)
{
return (struct lnet_genl_ping_list *)cb->args[0];
}
static int lnet_ping_show_done(struct netlink_callback *cb)
{
struct lnet_genl_ping_list *plist = lnet_ping_dump_ctx(cb);
if (plist) {
genradix_free(&plist->lgpl_failed);
genradix_free(&plist->lgpl_list);
LIBCFS_FREE(plist, sizeof(*plist));
cb->args[0] = 0;
}
return 0;
}
/* LNet ping ->start() handler for GET requests */
static int lnet_ping_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
struct lnet_genl_ping_list *plist;
int msg_len = genlmsg_len(gnlh);
struct nlattr *params, *top;
int rem, rc = 0;
if (the_lnet.ln_refcount == 0) {
NL_SET_ERR_MSG(extack, "Network is down");
return -ENETDOWN;
}
if (!msg_len) {
NL_SET_ERR_MSG(extack, "Ping needs NID targets");
return -ENOENT;
}
LIBCFS_ALLOC(plist, sizeof(*plist));
if (!plist) {
NL_SET_ERR_MSG(extack, "failed to setup ping list");
return -ENOMEM;
}
genradix_init(&plist->lgpl_list);
plist->lgpl_timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
plist->lgpl_src_nid = LNET_ANY_NID;
plist->lgpl_index = 0;
plist->lgpl_list_count = 0;
cb->args[0] = (long)plist;
params = genlmsg_data(gnlh);
nla_for_each_attr(top, params, msg_len, rem) {
struct nlattr *nids;
int rem2;
switch (nla_type(top)) {
case LN_SCALAR_ATTR_VALUE:
if (nla_strcmp(top, "timeout") == 0) {
s64 timeout;
top = nla_next(top, &rem);
if (nla_type(top) != LN_SCALAR_ATTR_INT_VALUE) {
NL_SET_ERR_MSG(extack,
"invalid timeout param");
GOTO(report_err, rc = -EINVAL);
}
/* If timeout is negative then set default of
* 3 minutes
*/
timeout = nla_get_s64(top);
if (timeout > 0 &&
timeout < (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
plist->lgpl_timeout =
nsecs_to_jiffies(timeout * NSEC_PER_MSEC);
} else if (nla_strcmp(top, "source") == 0) {
char nidstr[LNET_NIDSTR_SIZE + 1];
top = nla_next(top, &rem);
if (nla_type(top) != LN_SCALAR_ATTR_VALUE) {
NL_SET_ERR_MSG(extack,
"invalid source param");
GOTO(report_err, rc = -EINVAL);
}
rc = nla_strscpy(nidstr, top, sizeof(nidstr));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to parse source nid");
GOTO(report_err, rc);
}
rc = libcfs_strnid(&plist->lgpl_src_nid,
strim(nidstr));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"invalid source nid");
GOTO(report_err, rc);
}
rc = 0;
}
break;
case LN_SCALAR_ATTR_LIST:
nla_for_each_nested(nids, top, rem2) {
char nid[LNET_NIDSTR_SIZE + 1];
struct lnet_processid *id;
if (nla_type(nids) != LN_SCALAR_ATTR_VALUE)
continue;
memset(nid, 0, sizeof(nid));
rc = nla_strscpy(nid, nids, sizeof(nid));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to get NID");
GOTO(report_err, rc);
}
id = genradix_ptr_alloc(&plist->lgpl_list,
plist->lgpl_list_count++,
GFP_KERNEL);
if (!id) {
NL_SET_ERR_MSG(extack,
"failed to allocate NID");
GOTO(report_err, rc = -ENOMEM);
}
rc = libcfs_strid(id, strim(nid));
if (rc < 0) {
NL_SET_ERR_MSG(extack, "cannot parse NID");
GOTO(report_err, rc);
}
rc = 0;
}
fallthrough;
default:
break;
}
}
report_err:
if (rc < 0)
lnet_ping_show_done(cb);
return rc;
}
static const struct ln_key_list ping_err_props_list = {
.lkl_maxattr = LNET_ERR_ATTR_MAX,
.lkl_list = {
[LNET_ERR_ATTR_HDR] = {
.lkp_value = "manage",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_ERR_ATTR_TYPE] = {
.lkp_value = "ping",
.lkp_data_type = NLA_STRING,
},
[LNET_ERR_ATTR_ERRNO] = {
.lkp_value = "errno",
.lkp_data_type = NLA_S16,
},
[LNET_ERR_ATTR_DESCR] = {
.lkp_value = "descr",
.lkp_data_type = NLA_STRING,
},
},
};
static const struct ln_key_list ping_props_list = {
.lkl_maxattr = LNET_PING_ATTR_MAX,
.lkl_list = {
[LNET_PING_ATTR_HDR] = {
.lkp_value = "ping",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_PING_ATTR_PRIMARY_NID] = {
.lkp_value = "primary nid",
.lkp_data_type = NLA_STRING
},
[LNET_PING_ATTR_ERRNO] = {
.lkp_value = "errno",
.lkp_data_type = NLA_S16
},
[LNET_PING_ATTR_MULTIRAIL] = {
.lkp_value = "Multi-Rail",
.lkp_data_type = NLA_FLAG
},
[LNET_PING_ATTR_PEER_NI_LIST] = {
.lkp_value = "peer_ni",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
},
};
static const struct ln_key_list ping_peer_ni_list = {
.lkl_maxattr = LNET_PING_PEER_NI_ATTR_MAX,
.lkl_list = {
[LNET_PING_PEER_NI_ATTR_NID] = {
.lkp_value = "nid",
.lkp_data_type = NLA_STRING
},
},
};
static int lnet_ping_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_ping_list *plist = lnet_ping_dump_ctx(cb);
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
int seq = cb->nlh->nlmsg_seq;
int idx = plist->lgpl_index;
int rc = 0, i = 0;
if (!plist->lgpl_index) {
const struct ln_key_list *all[] = {
&ping_props_list, &ping_peer_ni_list, NULL
};
rc = lnet_genl_send_scalar_list(msg, portid, seq,
&lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_PING, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(send_error, rc);
}
genradix_init(&plist->lgpl_failed);
}
while (idx < plist->lgpl_list_count) {
struct lnet_nid primary_nid = LNET_ANY_NID;
struct lnet_genl_ping_list peers;
struct lnet_processid *id;
struct nlattr *nid_list;
struct lnet_peer *lp;
bool mr_flag = false;
unsigned int count;
void *hdr = NULL;
id = genradix_ptr(&plist->lgpl_list, idx++);
if (CFS_FAIL_CHECK(CFS_FAIL_TEST_PING_MD))
lnet_discover_nid_metadata(id, LNET_TRANSACTION_TIMEOUT_DEFAULT,
NULL);
rc = lnet_ping(id, &plist->lgpl_src_nid, plist->lgpl_timeout,
&peers, lnet_interfaces_max);
if (rc < 0) {
struct lnet_fail_ping *fail;
fail = genradix_ptr_alloc(&plist->lgpl_failed,
plist->lgpl_failed_count++,
GFP_KERNEL);
if (!fail) {
NL_SET_ERR_MSG(extack,
"failed to allocate failed NID");
GOTO(send_error, rc);
}
memset(fail->lfp_msg, '\0', sizeof(fail->lfp_msg));
snprintf(fail->lfp_msg, sizeof(fail->lfp_msg),
"failed to ping %s",
libcfs_nidstr(&id->nid));
fail->lfp_id = *id;
fail->lfp_errno = rc;
goto cant_reach;
}
mutex_lock(&the_lnet.ln_api_mutex);
lp = lnet_find_peer(&id->nid);
if (lp) {
primary_nid = lp->lp_primary_nid;
mr_flag = lnet_peer_is_multi_rail(lp);
lnet_peer_decref_locked(lp);
}
mutex_unlock(&the_lnet.ln_api_mutex);
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_PING);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
genlmsg_cancel(msg, hdr);
GOTO(send_error, rc = -EMSGSIZE);
}
if (i++ == 0)
nla_put_string(msg, LNET_PING_ATTR_HDR, "");
nla_put_string(msg, LNET_PING_ATTR_PRIMARY_NID,
libcfs_nidstr(&primary_nid));
if (mr_flag)
nla_put_flag(msg, LNET_PING_ATTR_MULTIRAIL);
nid_list = nla_nest_start(msg, LNET_PING_ATTR_PEER_NI_LIST);
for (count = 0; count < rc; count++) {
struct lnet_processid *result;
struct nlattr *nid_attr;
char *idstr;
result = genradix_ptr(&peers.lgpl_list, count);
if (nid_is_lo0(&result->nid))
continue;
nid_attr = nla_nest_start(msg, count + 1);
if (id->pid == LNET_PID_LUSTRE)
idstr = libcfs_nidstr(&result->nid);
else
idstr = libcfs_idstr(result);
nla_put_string(msg, LNET_PING_PEER_NI_ATTR_NID, idstr);
nla_nest_end(msg, nid_attr);
}
nla_nest_end(msg, nid_list);
genlmsg_end(msg, hdr);
cant_reach:
genradix_free(&peers.lgpl_list);
}
if (plist->lgpl_failed_count) {
int flags = NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
const struct ln_key_list *fail[] = {
&ping_err_props_list, NULL
};
rc = lnet_genl_send_scalar_list(msg, portid, seq, &lnet_family,
flags, LNET_CMD_PING, fail);
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to send new key table");
GOTO(send_error, rc);
}
for (i = 0; i < plist->lgpl_failed_count; i++) {
struct lnet_fail_ping *fail;
void *hdr;
fail = genradix_ptr(&plist->lgpl_failed, i);
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_PING);
if (!hdr) {
NL_SET_ERR_MSG(extack,
"failed to send failed values");
genlmsg_cancel(msg, hdr);
GOTO(send_error, rc = -EMSGSIZE);
}
if (i == 0)
nla_put_string(msg, LNET_ERR_ATTR_HDR, "");
nla_put_string(msg, LNET_ERR_ATTR_TYPE, "\n");
nla_put_s16(msg, LNET_ERR_ATTR_ERRNO,
fail->lfp_errno);
nla_put_string(msg, LNET_ERR_ATTR_DESCR,
fail->lfp_msg);
genlmsg_end(msg, hdr);
}
}
genradix_free(&plist->lgpl_list);
rc = 0; /* don't treat it as an error */
plist->lgpl_index = idx;
send_error:
return rc;
}
static const struct ln_key_list discover_err_props_list = {
.lkl_maxattr = LNET_ERR_ATTR_MAX,
.lkl_list = {
[LNET_ERR_ATTR_HDR] = {
.lkp_value = "manage",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_ERR_ATTR_TYPE] = {
.lkp_value = "discover",
.lkp_data_type = NLA_STRING,
},
[LNET_ERR_ATTR_ERRNO] = {
.lkp_value = "errno",
.lkp_data_type = NLA_S16,
},
[LNET_ERR_ATTR_DESCR] = {
.lkp_value = "descr",
.lkp_data_type = NLA_STRING,
},
},
};
static const struct ln_key_list discover_props_list = {
.lkl_maxattr = LNET_PING_ATTR_MAX,
.lkl_list = {
[LNET_PING_ATTR_HDR] = {
.lkp_value = "discover",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_PING_ATTR_PRIMARY_NID] = {
.lkp_value = "primary nid",
.lkp_data_type = NLA_STRING
},
[LNET_PING_ATTR_ERRNO] = {
.lkp_value = "errno",
.lkp_data_type = NLA_S16
},
[LNET_PING_ATTR_MULTIRAIL] = {
.lkp_value = "Multi-Rail",
.lkp_data_type = NLA_FLAG
},
[LNET_PING_ATTR_PEER_NI_LIST] = {
.lkp_value = "peer_ni",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NESTED
},
},
};
static int lnet_ping_cmd(struct sk_buff *skb, struct genl_info *info)
{
const struct ln_key_list *all[] = {
&discover_props_list, &ping_peer_ni_list, NULL
};
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
struct lnet_genl_ping_list dlists;
int msg_len, rem, rc = 0, i;
bool clear_hdr = false;
struct sk_buff *reply;
struct nlattr *attr;
void *hdr = NULL;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
return -ENOMSG;
}
if (!(info->nlhdr->nlmsg_flags & NLM_F_CREATE)) {
GENL_SET_ERR_MSG(info, "only NLM_F_CREATE setting is allowed");
return -EINVAL;
}
reply = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!reply) {
GENL_SET_ERR_MSG(info,
"fail to allocate reply");
return -ENOMEM;
}
genradix_init(&dlists.lgpl_failed);
dlists.lgpl_failed_count = 0;
genradix_init(&dlists.lgpl_list);
dlists.lgpl_list_count = 0;
rc = lnet_genl_send_scalar_list(reply, info->snd_portid,
info->snd_seq, &lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_PING, all);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to send key table");
GOTO(report_err, rc);
}
nla_for_each_attr(attr, params, msg_len, rem) {
struct nlattr *nids;
int rem2;
/* We only care about the NID list to discover with */
if (nla_type(attr) != LN_SCALAR_ATTR_LIST)
continue;
nla_for_each_nested(nids, attr, rem2) {
char nid[LNET_NIDSTR_SIZE + 1];
struct lnet_processid id;
struct nlattr *nid_list;
struct lnet_peer *lp;
ssize_t len;
if (nla_type(nids) != LN_SCALAR_ATTR_VALUE)
continue;
memset(nid, 0, sizeof(nid));
rc = nla_strscpy(nid, nids, sizeof(nid));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to get NID");
GOTO(report_err, rc);
}
len = libcfs_strid(&id, strim(nid));
if (len < 0) {
struct lnet_fail_ping *fail;
fail = genradix_ptr_alloc(&dlists.lgpl_failed,
dlists.lgpl_failed_count++,
GFP_KERNEL);
if (!fail) {
GENL_SET_ERR_MSG(info,
"failed to allocate improper NID");
GOTO(report_err, rc = -ENOMEM);
}
memset(fail->lfp_msg, '\0', sizeof(fail->lfp_msg));
snprintf(fail->lfp_msg, sizeof(fail->lfp_msg),
"cannot parse NID '%s'", strim(nid));
fail->lfp_id = id;
fail->lfp_errno = len;
continue;
}
if (LNET_NID_IS_ANY(&id.nid))
continue;
rc = lnet_discover(&id,
info->nlhdr->nlmsg_flags & NLM_F_EXCL,
&dlists);
if (rc < 0) {
struct lnet_fail_ping *fail;
fail = genradix_ptr_alloc(&dlists.lgpl_failed,
dlists.lgpl_failed_count++,
GFP_KERNEL);
if (!fail) {
GENL_SET_ERR_MSG(info,
"failed to allocate failed NID");
GOTO(report_err, rc = -ENOMEM);
}
memset(fail->lfp_msg, '\0', sizeof(fail->lfp_msg));
snprintf(fail->lfp_msg, sizeof(fail->lfp_msg),
"failed to discover %s",
libcfs_nidstr(&id.nid));
fail->lfp_id = id;
fail->lfp_errno = rc;
continue;
}
/* create the genetlink message header */
hdr = genlmsg_put(reply, info->snd_portid, info->snd_seq,
&lnet_family, NLM_F_MULTI, LNET_CMD_PING);
if (!hdr) {
GENL_SET_ERR_MSG(info,
"failed to allocate hdr");
GOTO(report_err, rc = -ENOMEM);
}
if (!clear_hdr) {
nla_put_string(reply, LNET_PING_ATTR_HDR, "");
clear_hdr = true;
}
lp = lnet_find_peer(&id.nid);
if (lp) {
nla_put_string(reply, LNET_PING_ATTR_PRIMARY_NID,
libcfs_nidstr(&lp->lp_primary_nid));
if (lnet_peer_is_multi_rail(lp))
nla_put_flag(reply, LNET_PING_ATTR_MULTIRAIL);
lnet_peer_decref_locked(lp);
}
nid_list = nla_nest_start(reply, LNET_PING_ATTR_PEER_NI_LIST);
for (i = 0; i < dlists.lgpl_list_count; i++) {
struct lnet_processid *found;
struct nlattr *nid_attr;
char *idstr;
found = genradix_ptr(&dlists.lgpl_list, i);
if (nid_is_lo0(&found->nid))
continue;
nid_attr = nla_nest_start(reply, i + 1);
if (id.pid == LNET_PID_LUSTRE)
idstr = libcfs_nidstr(&found->nid);
else
idstr = libcfs_idstr(found);
nla_put_string(reply, LNET_PING_PEER_NI_ATTR_NID, idstr);
nla_nest_end(reply, nid_attr);
}
nla_nest_end(reply, nid_list);
genlmsg_end(reply, hdr);
}
}
if (dlists.lgpl_failed_count) {
int flags = NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
const struct ln_key_list *fail[] = {
&discover_err_props_list, NULL
};
rc = lnet_genl_send_scalar_list(reply, info->snd_portid,
info->snd_seq, &lnet_family,
flags, LNET_CMD_PING, fail);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"failed to send new key table");
GOTO(report_err, rc);
}
for (i = 0; i < dlists.lgpl_failed_count; i++) {
struct lnet_fail_ping *fail;
hdr = genlmsg_put(reply, info->snd_portid, info->snd_seq,
&lnet_family, NLM_F_MULTI, LNET_CMD_PING);
if (!hdr) {
GENL_SET_ERR_MSG(info,
"failed to send failed values");
GOTO(report_err, rc = -ENOMSG);
}
fail = genradix_ptr(&dlists.lgpl_failed, i);
if (i == 0)
nla_put_string(reply, LNET_ERR_ATTR_HDR, "");
nla_put_string(reply, LNET_ERR_ATTR_TYPE, "\n");
nla_put_s16(reply, LNET_ERR_ATTR_ERRNO,
fail->lfp_errno);
nla_put_string(reply, LNET_ERR_ATTR_DESCR,
fail->lfp_msg);
genlmsg_end(reply, hdr);
}
}
nlh = nlmsg_put(reply, info->snd_portid, info->snd_seq, NLMSG_DONE, 0,
NLM_F_MULTI);
if (!nlh) {
genlmsg_cancel(reply, hdr);
GENL_SET_ERR_MSG(info,
"failed to finish message");
GOTO(report_err, rc = -EMSGSIZE);
}
report_err:
genradix_free(&dlists.lgpl_failed);
genradix_free(&dlists.lgpl_list);
if (rc < 0) {
genlmsg_cancel(reply, hdr);
nlmsg_free(reply);
} else {
rc = genlmsg_reply(reply, info);
}
return rc;
}
#define lnet_peer_dist_show_done lnet_peer_ni_show_done
static int lnet_peer_dist_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
struct lnet_genl_processid_list *plist;
int msg_len = genlmsg_len(gnlh);
struct nlattr *params, *top;
int rem, rc = 0;
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_state != LNET_STATE_RUNNING) {
NL_SET_ERR_MSG(extack, "Network is down");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENETDOWN;
}
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
NL_SET_ERR_MSG(extack, "Missing NID argument(s)");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOENT;
}
CFS_ALLOC_PTR(plist);
if (!plist) {
NL_SET_ERR_MSG(extack, "No memory for peer NID list");
mutex_unlock(&the_lnet.ln_api_mutex);
return -ENOMEM;
}
genradix_init(&plist->lgpl_list);
plist->lgpl_count = 0;
plist->lgpl_index = 0;
cb->args[0] = (long)plist;
params = genlmsg_data(gnlh);
nla_for_each_attr(top, params, msg_len, rem) {
struct nlattr *nids;
int rem2;
if (nla_type(top) != LN_SCALAR_ATTR_LIST)
continue;
nla_for_each_nested(nids, top, rem2) {
char nidstr[LNET_NIDSTR_SIZE + 1];
struct lnet_processid *id;
if (nla_type(nids) != LN_SCALAR_ATTR_VALUE)
continue;
memset(nidstr, 0, sizeof(nidstr));
rc = nla_strscpy(nidstr, nids, sizeof(nidstr));
if (rc < 0) {
NL_SET_ERR_MSG(extack,
"failed to get NID");
GOTO(report_err, rc);
}
id = genradix_ptr_alloc(&plist->lgpl_list,
plist->lgpl_count++,
GFP_KERNEL);
if (!id) {
NL_SET_ERR_MSG(extack, "failed to allocate NID");
GOTO(report_err, rc = -ENOMEM);
}
rc = libcfs_strid(id, strim(nidstr));
if (rc < 0) {
NL_SET_ERR_MSG(extack, "invalid NID");
GOTO(report_err, rc);
}
rc = 0;
}
}
report_err:
mutex_unlock(&the_lnet.ln_api_mutex);
if (rc < 0)
lnet_peer_dist_show_done(cb);
return rc;
}
static const struct ln_key_list peer_dist_props_list = {
.lkl_maxattr = LNET_PEER_DIST_ATTR_MAX,
.lkl_list = {
[LNET_PEER_DIST_ATTR_HDR] = {
.lkp_value = "peer",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_PEER_DIST_ATTR_NID] = {
.lkp_value = "nid",
.lkp_data_type = NLA_STRING
},
[LNET_PEER_DIST_ATTR_DIST] = {
.lkp_value = "distance",
.lkp_data_type = NLA_U32
},
[LNET_PEER_DIST_ATTR_ORDER] = {
.lkp_value = "order",
.lkp_data_type = NLA_U32
},
},
};
static int lnet_peer_dist_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_processid_list *plist = lnet_peer_dump_ctx(cb);
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
int seq = cb->nlh->nlmsg_seq;
int idx = plist->lgpl_index;
int rc = 0;
if (!idx) {
const struct ln_key_list *all[] = {
&peer_dist_props_list, NULL
};
rc = lnet_genl_send_scalar_list(msg, portid, seq,
&lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_PEER_DIST, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(send_error, rc);
}
}
while (idx < plist->lgpl_count) {
struct lnet_processid *id;
void *hdr;
u32 order;
int dist;
id = genradix_ptr(&plist->lgpl_list, idx++);
if (nid_is_lo0(&id->nid))
continue;
dist = LNetDist(&id->nid, &id->nid, &order);
if (dist < 0) {
if (dist == -EHOSTUNREACH)
continue;
rc = dist;
return rc;
}
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_PEER_DIST);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
genlmsg_cancel(msg, hdr);
GOTO(send_error, rc = -EMSGSIZE);
}
if (idx == 1)
nla_put_string(msg, LNET_PEER_DIST_ATTR_HDR, "");
nla_put_string(msg, LNET_PEER_DIST_ATTR_NID,
libcfs_nidstr(&id->nid));
nla_put_u32(msg, LNET_PEER_DIST_ATTR_DIST, dist);
nla_put_u32(msg, LNET_PEER_DIST_ATTR_ORDER, order);
genlmsg_end(msg, hdr);
}
plist->lgpl_index = idx;
send_error:
return rc;
}
static int lnet_peer_fail_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
struct netlink_ext_ack *extack = info->extack;
int msg_len, rem, rc = 0;
struct nlattr *attr;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
return -ENOMSG;
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
return -EINVAL;
}
nla_for_each_nested(attr, params, rem) {
s64 threshold = LNET_MD_THRESH_INF;
struct lnet_nid pnid = {};
struct nlattr *peer;
int rem2;
if (nla_type(attr) != LN_SCALAR_ATTR_LIST)
continue;
nla_for_each_nested(peer, attr, rem2) {
if (nla_type(peer) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(peer, "nid") == 0) {
char nidstr[LNET_NIDSTR_SIZE];
rc = nla_extract_val(&peer, &rem2,
LN_SCALAR_ATTR_VALUE,
nidstr, sizeof(nidstr),
extack);
if (rc < 0)
GOTO(report_err, rc);
rc = libcfs_strnid(&pnid, strim(nidstr));
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"invalid peer NID");
GOTO(report_err, rc);
}
rc = 0;
} else if (nla_strcmp(peer, "threshold") == 0) {
rc = nla_extract_val(&peer, &rem2,
LN_SCALAR_ATTR_INT_VALUE,
&threshold, sizeof(threshold),
extack);
if (rc < 0) {
GOTO(report_err, rc);
}
}
}
if (!nid_addr_is_set(&pnid)) {
GENL_SET_ERR_MSG(info, "peer NID missing");
GOTO(report_err, rc);
}
rc = lnet_fail_nid(&pnid, threshold);
if (rc < 0) {
GENL_SET_ERR_MSG(info,
"could not set threshoold for peer NID");
GOTO(report_err, rc);
}
}
report_err:
return rc;
}
struct lnet_genl_debug_recovery_list {
unsigned int lgdrl_index;
unsigned int lgdrl_count;
unsigned int lgdrl_len;
struct ln_key_list *lgdrl_keys;
enum lnet_health_type lgdrl_type;
GENRADIX(struct lnet_nid) lgdrl_nids;
};
static inline struct lnet_genl_debug_recovery_list *
lnet_debug_recovery_dump_ctx(struct netlink_callback *cb)
{
return (struct lnet_genl_debug_recovery_list *)cb->args[0];
}
static int lnet_debug_recovery_show_done(struct netlink_callback *cb)
{
struct lnet_genl_debug_recovery_list *drlist;
ENTRY;
drlist = lnet_debug_recovery_dump_ctx(cb);
if (drlist) {
if (drlist->lgdrl_keys) {
int i;
for (i = 1; i < drlist->lgdrl_count; i++) {
int idx = i + LNET_DBG_RECOV_ATTR_MAX;
struct ln_key_props *props;
props = &drlist->lgdrl_keys->lkl_list[idx];
kfree(props->lkp_value);
}
LIBCFS_FREE(drlist->lgdrl_keys,
drlist->lgdrl_len);
}
genradix_free(&drlist->lgdrl_nids);
CFS_FREE_PTR(drlist);
}
cb->args[0] = 0;
RETURN(0);
}
static int lnet_debug_recovery_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
struct nlattr *params;
struct nlattr *entry;
struct lnet_genl_debug_recovery_list *drlist;
enum lnet_health_type type = -1;
struct lnet_nid *nid;
int rem, rc = 0;
int msg_len;
ENTRY;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
NL_SET_ERR_MSG(extack, "No configuration");
RETURN(-ENOMSG);
}
params = genlmsg_data(gnlh);
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
NL_SET_ERR_MSG(extack, "invalid configuration");
RETURN(-EINVAL);
}
nla_for_each_attr(entry, params, msg_len, rem) {
s64 tmp;
if (nla_type(entry) != LN_SCALAR_ATTR_VALUE ||
nla_strcmp(entry, "queue_type") != 0)
continue;
rc = nla_extract_val(&entry, &rem, LN_SCALAR_ATTR_INT_VALUE,
(void *)&tmp, sizeof(tmp),
extack);
if (rc < 0)
GOTO(report_error, rc);
type = tmp;
}
CDEBUG(D_NET, "Got queue_type: %d\n", type);
CFS_ALLOC_PTR(drlist);
if (!drlist) {
NL_SET_ERR_MSG(extack, "No memory for recovery list");
RETURN(-ENOMEM);
}
genradix_init(&drlist->lgdrl_nids);
drlist->lgdrl_index = 0;
drlist->lgdrl_count = 0;
drlist->lgdrl_type = type;
cb->args[0] = (long)drlist;
rc = -ENOENT;
lnet_net_lock(LNET_LOCK_EX);
if (type == LNET_HEALTH_TYPE_LOCAL_NI) {
struct lnet_ni *ni;
list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq,
ni_recovery) {
CDEBUG(D_NET, "nid: %s\n", libcfs_nidstr(&ni->ni_nid));
nid = genradix_ptr_alloc(&drlist->lgdrl_nids,
drlist->lgdrl_count++,
GFP_ATOMIC);
if (!nid)
GOTO(report_error_unlock, rc = -ENOMEM);
*nid = ni->ni_nid;
rc = 0;
}
} else if (type == LNET_HEALTH_TYPE_PEER_NI) {
struct lnet_peer_ni *lpni;
list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq,
lpni_recovery) {
CDEBUG(D_NET, "nid: %s\n",
libcfs_nidstr(&lpni->lpni_nid));
nid = genradix_ptr_alloc(&drlist->lgdrl_nids,
drlist->lgdrl_count++,
GFP_ATOMIC);
if (!nid)
GOTO(report_error_unlock, rc = -ENOMEM);
*nid = lpni->lpni_nid;
rc = 0;
}
}
report_error_unlock:
lnet_net_unlock(LNET_LOCK_EX);
report_error:
if (rc < 0)
lnet_debug_recovery_show_done(cb);
RETURN(rc);
}
static const struct ln_key_list debug_recovery_attr_list = {
.lkl_maxattr = LNET_DBG_RECOV_ATTR_MAX,
.lkl_list = {
[LNET_DBG_RECOV_ATTR_HDR] = {
.lkp_key_format = LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_DBG_RECOV_ATTR_NID] = {
.lkp_value = "nid-0",
.lkp_data_type = NLA_STRING,
},
},
};
static int lnet_debug_recovery_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_debug_recovery_list *drlist;
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
int seq = cb->nlh->nlmsg_seq;
int rc = 0;
void *hdr;
int idx;
ENTRY;
drlist = lnet_debug_recovery_dump_ctx(cb);
if (!drlist->lgdrl_count) {
NL_SET_ERR_MSG(extack, "No NIDs in recovery");
GOTO(send_error, rc = -ENOENT);
}
idx = drlist->lgdrl_index;
if (!idx) {
unsigned int count = debug_recovery_attr_list.lkl_maxattr;
const struct ln_key_list *all[] = { NULL, NULL };
size_t len = sizeof(struct ln_key_list);
struct ln_key_list *keys;
int i;
count += drlist->lgdrl_count - 1;
len += sizeof(struct ln_key_props) * count;
LIBCFS_ALLOC(keys, len);
if (!keys) {
NL_SET_ERR_MSG(extack,
"key list allocation failure");
GOTO(send_error, rc = -ENOMEM);
}
/* Set initial values */
*keys = debug_recovery_attr_list;
if (drlist->lgdrl_type == LNET_HEALTH_TYPE_LOCAL_NI) {
keys->lkl_list[LNET_DBG_RECOV_ATTR_HDR].lkp_value =
"Local NI recovery";
} else {
keys->lkl_list[LNET_DBG_RECOV_ATTR_HDR].lkp_value =
"Peer NI recovery";
}
keys->lkl_maxattr = count;
for (i = 1; i < drlist->lgdrl_count; i++) {
keys->lkl_list[LNET_DBG_RECOV_ATTR_MAX + i].lkp_data_type =
NLA_STRING;
keys->lkl_list[LNET_DBG_RECOV_ATTR_MAX + i].lkp_value =
kasprintf(GFP_ATOMIC, "nid-%u", i);
}
/* memory cleaned up is done in lnet_debug_recovery_show_done */
drlist->lgdrl_keys = keys;
drlist->lgdrl_len = len;
all[0] = keys;
rc = lnet_genl_send_scalar_list(msg, portid, seq,
&lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_DBG_RECOV, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(send_error, rc);
}
}
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_DBG_RECOV);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
genlmsg_cancel(msg, hdr);
GOTO(send_error, rc = -EMSGSIZE);
}
while (idx < drlist->lgdrl_count) {
struct lnet_nid *nid;
if (idx == 1)
nla_put_string(msg, LNET_DBG_RECOV_ATTR_HDR, "");
nid = genradix_ptr(&drlist->lgdrl_nids, idx++);
CDEBUG(D_NET, "nid: %s\n", libcfs_nidstr(nid));
nla_put_string(msg, LNET_DBG_RECOV_ATTR_NID + idx - 1,
libcfs_nidstr(nid));
}
genlmsg_end(msg, hdr);
drlist->lgdrl_index = idx;
send_error:
RETURN(rc);
}
static inline struct lnet_genl_fault_rule_list *
lnet_fault_dump_ctx(struct netlink_callback *cb)
{
return (struct lnet_genl_fault_rule_list *)cb->args[0];
}
static int lnet_fault_show_done(struct netlink_callback *cb)
{
struct lnet_genl_fault_rule_list *rlist = lnet_fault_dump_ctx(cb);
ENTRY;
if (rlist) {
genradix_free(&rlist->lgfrl_list);
CFS_FREE_PTR(rlist);
}
cb->args[0] = 0;
RETURN(0);
}
static int lnet_fault_show_start(struct netlink_callback *cb)
{
struct genlmsghdr *gnlh = nlmsg_data(cb->nlh);
struct netlink_ext_ack *extack = cb->extack;
struct nlattr *params = genlmsg_data(gnlh);
struct lnet_genl_fault_rule_list *rlist;
int msg_len, rem, rc = 0;
struct nlattr *entry;
s64 opc = 0;
ENTRY;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
NL_SET_ERR_MSG(extack, "no configuration");
RETURN(-ENOMSG);
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
NL_SET_ERR_MSG(extack, "invalid configuration");
RETURN(-EINVAL);
}
nla_for_each_attr(entry, params, msg_len, rem) {
if (nla_type(entry) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(entry, "rule_type") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
(void *)&opc, sizeof(opc), extack);
if (rc < 0)
GOTO(report_error, rc);
}
}
CDEBUG(D_NET, "Got opc %lld\n", opc);
if (opc != LNET_CTL_DROP_LIST && opc != LNET_CTL_DELAY_LIST) {
NL_SET_ERR_MSG(extack, "invalid operation");
GOTO(report_error, rc = -EINVAL);
}
CFS_ALLOC_PTR(rlist);
if (!rlist) {
NL_SET_ERR_MSG(extack, "No memory for rule list");
RETURN(-ENOMEM);
}
genradix_init(&rlist->lgfrl_list);
rlist->lgfrl_count = 0;
rlist->lgfrl_index = 0;
rlist->lgfrl_opc = opc;
cb->args[0] = (long)rlist;
rc = -ENOENT;
if (opc == LNET_CTL_DROP_LIST)
rc = lnet_drop_rule_collect(rlist);
else if (opc == LNET_CTL_DELAY_LIST)
rc = lnet_delay_rule_collect(rlist);
report_error:
if (rc < 0)
lnet_fault_show_done(cb);
RETURN(rc);
}
static const struct ln_key_list fault_attr_list = {
.lkl_maxattr = LNET_FAULT_ATTR_MAX,
.lkl_list = {
[LNET_FAULT_ATTR_HDR] = {
.lkp_value = "fault",
.lkp_key_format = LNKF_SEQUENCE | LNKF_MAPPING,
.lkp_data_type = NLA_NUL_STRING,
},
[LNET_FAULT_ATTR_FA_TYPE] = {
.lkp_value = "rule_type",
.lkp_data_type = NLA_STRING
},
[LNET_FAULT_ATTR_FA_SRC] = {
.lkp_value = "fa_src",
.lkp_data_type = NLA_STRING
},
[LNET_FAULT_ATTR_FA_DST] = {
.lkp_value = "fa_dst",
.lkp_data_type = NLA_STRING
},
[LNET_FAULT_ATTR_FA_PTL_MASK] = {
.lkp_value = "fa_ptl_mask",
.lkp_data_type = NLA_U64
},
[LNET_FAULT_ATTR_FA_MSG_MASK] = {
.lkp_value = "fa_msg_mask",
.lkp_data_type = NLA_U32
},
[LNET_FAULT_ATTR_DA_RATE] = {
.lkp_value = "da_rate",
.lkp_data_type = NLA_U32
},
[LNET_FAULT_ATTR_DA_INTERVAL] = {
.lkp_value = "da_interval",
.lkp_data_type = NLA_U32
},
[LNET_FAULT_ATTR_DS_DROPPED] = {
.lkp_value = "ds_dropped",
.lkp_data_type = NLA_U64
},
[LNET_FAULT_ATTR_LA_RATE] = {
.lkp_value = "la_rate",
.lkp_data_type = NLA_U32
},
[LNET_FAULT_ATTR_LA_INTERVAL] = {
.lkp_value = "la_interval",
.lkp_data_type = NLA_U32
},
[LNET_FAULT_ATTR_LA_LATENCY] = {
.lkp_value = "la_latency",
.lkp_data_type = NLA_U32
},
[LNET_FAULT_ATTR_LS_DELAYED] = {
.lkp_value = "ls_delayed",
.lkp_data_type = NLA_U64
},
[LNET_FAULT_ATTR_FS_COUNT] = {
.lkp_value = "fs_count",
.lkp_data_type = NLA_U64
},
[LNET_FAULT_ATTR_FS_PUT] = {
.lkp_value = "fs_put",
.lkp_data_type = NLA_U64
},
[LNET_FAULT_ATTR_FS_ACK] = {
.lkp_value = "fs_ack",
.lkp_data_type = NLA_U64
},
[LNET_FAULT_ATTR_FS_GET] = {
.lkp_value = "fs_get",
.lkp_data_type = NLA_U64
},
[LNET_FAULT_ATTR_FS_REPLY] = {
.lkp_value = "fs_reply",
.lkp_data_type = NLA_U64
},
},
};
static int lnet_fault_show_dump(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct lnet_genl_fault_rule_list *rlist = lnet_fault_dump_ctx(cb);
struct netlink_ext_ack *extack = cb->extack;
int portid = NETLINK_CB(cb->skb).portid;
int seq = cb->nlh->nlmsg_seq;
int idx, rc = 0;
u32 opc;
ENTRY;
if (!rlist->lgfrl_count) {
NL_SET_ERR_MSG(extack, "No routes found");
GOTO(send_error, rc = -ENOENT);
}
idx = rlist->lgfrl_index;
if (!idx) {
const struct ln_key_list *all[] = {
&fault_attr_list, NULL
};
rc = lnet_genl_send_scalar_list(msg, portid, seq,
&lnet_family,
NLM_F_CREATE | NLM_F_MULTI,
LNET_CMD_FAULT, all);
if (rc < 0) {
NL_SET_ERR_MSG(extack, "failed to send key table");
GOTO(send_error, rc);
}
}
opc = rlist->lgfrl_opc;
while (idx < rlist->lgfrl_count) {
struct lnet_rule_properties *prop;
void *hdr;
prop = genradix_ptr(&rlist->lgfrl_list, idx++);
hdr = genlmsg_put(msg, portid, seq, &lnet_family,
NLM_F_MULTI, LNET_CMD_FAULT);
if (!hdr) {
NL_SET_ERR_MSG(extack, "failed to send values");
genlmsg_cancel(msg, hdr);
GOTO(send_error, rc = -EMSGSIZE);
}
if (idx == 1)
nla_put_string(msg, LNET_FAULT_ATTR_HDR, "");
nla_put_string(msg, LNET_FAULT_ATTR_FA_TYPE,
opc == LNET_CTL_DROP_LIST ? "drop" : "delay");
nla_put_string(msg, LNET_FAULT_ATTR_FA_SRC,
libcfs_nidstr(&prop->attr.fa_src));
nla_put_string(msg, LNET_FAULT_ATTR_FA_DST,
libcfs_nidstr(&prop->attr.fa_dst));
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_FA_PTL_MASK,
prop->attr.fa_ptl_mask,
LNET_FAULT_ATTR_PAD);
nla_put_u32(msg, LNET_FAULT_ATTR_FA_MSG_MASK,
prop->attr.fa_msg_mask);
if (opc == LNET_CTL_DROP_LIST) {
nla_put_u32(msg, LNET_FAULT_ATTR_DA_RATE,
prop->attr.u.drop.da_rate);
nla_put_u32(msg, LNET_FAULT_ATTR_DA_INTERVAL,
prop->attr.u.drop.da_interval);
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_DS_DROPPED,
prop->stat.u.drop.ds_dropped,
LNET_FAULT_ATTR_PAD);
} else if (opc == LNET_CTL_DELAY_LIST) {
nla_put_u32(msg, LNET_FAULT_ATTR_LA_RATE,
prop->attr.u.delay.la_rate);
nla_put_u32(msg, LNET_FAULT_ATTR_LA_INTERVAL,
prop->attr.u.delay.la_interval);
nla_put_u32(msg, LNET_FAULT_ATTR_LA_LATENCY,
prop->attr.u.delay.la_latency);
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_LS_DELAYED,
prop->stat.u.delay.ls_delayed,
LNET_FAULT_ATTR_PAD);
}
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_FS_COUNT,
prop->stat.fs_count,
LNET_FAULT_ATTR_PAD);
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_FS_PUT,
prop->stat.fs_put,
LNET_FAULT_ATTR_PAD);
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_FS_ACK,
prop->stat.fs_ack,
LNET_FAULT_ATTR_PAD);
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_FS_GET,
prop->stat.fs_get,
LNET_FAULT_ATTR_PAD);
nla_put_u64_64bit(msg, LNET_FAULT_ATTR_FS_REPLY,
prop->stat.fs_reply,
LNET_FAULT_ATTR_PAD);
genlmsg_end(msg, hdr);
}
rlist->lgfrl_index = idx;
send_error:
return rc;
}
static int lnet_fault_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
struct netlink_ext_ack *extack = info->extack;
struct lnet_fault_large_attr fattr;
int msg_len, rem, rc = 0;
struct nlattr *entry;
s64 opc = 0;
ENTRY;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
RETURN(-ENOMSG);
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
RETURN(-EINVAL);
}
fattr.fa_src = LNET_ANY_NID;
fattr.fa_dst = LNET_ANY_NID;
nla_for_each_attr(entry, params, msg_len, rem) {
u64 tmp;
CDEBUG(D_NET, "attr type: %d\n", nla_type(entry));
if (nla_type(entry) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(entry, "rule_type") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&opc, sizeof(opc), extack);
if (rc < 0)
GOTO(report_error, rc);
} else if (nla_strcmp(entry, "fa_src") == 0) {
rc = nla_strnid(&entry, &fattr.fa_src, &rem, extack);
if (rc < 0)
GOTO(report_error, rc);
} else if (nla_strcmp(entry, "fa_dst") == 0) {
rc = nla_strnid(&entry, &fattr.fa_dst, &rem, extack);
if (rc < 0)
GOTO(report_error, rc);
} else if (nla_strcmp(entry, "fa_local_nid") == 0) {
rc = nla_strnid(&entry, &fattr.fa_local_nid, &rem,
extack);
if (rc < 0)
GOTO(report_error, rc);
} else if (nla_strcmp(entry, "fa_ptl_mask") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.fa_ptl_mask = tmp;
} else if (nla_strcmp(entry, "fa_msg_mask") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.fa_msg_mask = tmp;
} else if (nla_strcmp(entry, "da_rate") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.drop.da_rate = tmp;
} else if (nla_strcmp(entry, "da_interval") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.drop.da_interval = tmp;
} else if (nla_strcmp(entry, "da_health_error_mask") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.drop.da_health_error_mask = tmp;
} else if (nla_strcmp(entry, "da_random") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.drop.da_random = !!tmp;
} else if (nla_strcmp(entry, "da_drop_all") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.drop.da_drop_all = !!tmp;
} else if (nla_strcmp(entry, "la_rate") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.delay.la_rate = tmp;
} else if (nla_strcmp(entry, "la_interval") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.delay.la_interval = tmp;
} else if (nla_strcmp(entry, "la_latency") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
fattr.u.delay.la_latency = tmp;
}
}
if (info->nlhdr->nlmsg_flags & NLM_F_CREATE) {
if (opc == LNET_CTL_DROP_ADD)
rc = lnet_drop_rule_add(&fattr);
else
rc = lnet_delay_rule_add(&fattr);
} else if (info->nlhdr->nlmsg_flags & NLM_F_REPLACE) {
if (opc == LNET_CTL_DROP_RESET)
lnet_drop_rule_reset();
else
lnet_delay_rule_reset();
} else if (!(info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_REPLACE))) {
if (opc == LNET_CTL_DROP_DEL)
rc = lnet_drop_rule_del(&fattr.fa_src, &fattr.fa_dst);
else
rc = lnet_delay_rule_del(&fattr.fa_src, &fattr.fa_dst,
false);
if (rc == 0)
rc = -ENOENT;
else
rc = 0;
}
report_error:
RETURN(rc);
}
static int lnet_routing_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
struct netlink_ext_ack *extack = info->extack;
int msg_len, rem, rc = 0;
struct nlattr *entry;
bool enable = false;
ENTRY;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
RETURN(-ENOMSG);
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
RETURN(-EINVAL);
}
nla_for_each_attr(entry, params, msg_len, rem) {
u64 tmp;
CDEBUG(D_NET, "attr type: %d\n", nla_type(entry));
if (nla_type(entry) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(entry, "enable") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
enable = tmp == 1;
}
}
mutex_lock(&the_lnet.ln_api_mutex);
if (enable)
rc = lnet_rtrpools_enable();
else
lnet_rtrpools_disable();
mutex_unlock(&the_lnet.ln_api_mutex);
report_error:
RETURN(rc);
}
static int lnet_buffers_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
struct netlink_ext_ack *extack = info->extack;
int msg_len, rem, rc = 0;
struct nlattr *entry;
int tiny, small, large;
ENTRY;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
RETURN(-ENOMSG);
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
RETURN(-EINVAL);
}
tiny = small = large = 0;
nla_for_each_attr(entry, params, msg_len, rem) {
u64 tmp;
CDEBUG(D_NET, "attr type: %d\n", nla_type(entry));
if (nla_type(entry) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(entry, "tiny") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
tiny = tmp;
} else if (nla_strcmp(entry, "small") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
small = tmp;
} else if (nla_strcmp(entry, "large") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
large = tmp;
}
}
CDEBUG(D_NET, "%d %d %d\n", tiny, small, large);
mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_rtrpools_adjust(tiny, small, large);
mutex_unlock(&the_lnet.ln_api_mutex);
report_error:
RETURN(rc);
}
static int lnet_numa_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct genlmsghdr *gnlh = nlmsg_data(nlh);
struct nlattr *params = genlmsg_data(gnlh);
struct netlink_ext_ack *extack = info->extack;
int msg_len, rem, rc = 0;
struct nlattr *entry;
int range = 0; /* default range */
ENTRY;
msg_len = genlmsg_len(gnlh);
if (!msg_len) {
GENL_SET_ERR_MSG(info, "no configuration");
RETURN(-ENOMSG);
}
if (!(nla_type(params) & LN_SCALAR_ATTR_LIST)) {
GENL_SET_ERR_MSG(info, "invalid configuration");
RETURN(-EINVAL);
}
nla_for_each_attr(entry, params, msg_len, rem) {
u64 tmp;
CDEBUG(D_NET, "attr type: %d\n", nla_type(entry));
if (nla_type(entry) != LN_SCALAR_ATTR_VALUE)
continue;
if (nla_strcmp(entry, "range") == 0) {
rc = nla_extract_val(&entry, &rem,
LN_SCALAR_ATTR_INT_VALUE,
&tmp, sizeof(tmp), extack);
if (rc < 0)
GOTO(report_error, rc);
range = tmp;
}
}
lnet_net_lock(LNET_LOCK_EX);
lnet_numa_range = range;
lnet_net_unlock(LNET_LOCK_EX);
report_error:
RETURN(rc);
}
static const struct genl_multicast_group lnet_mcast_grps[] = {
{ .name = "ip2net", },
{ .name = "net", },
{ .name = "peer", },
{ .name = "route", },
{ .name = "ping", },
{ .name = "discover", },
{ .name = "cpt-of-nid", },
{ .name = "dbg-recov", },
{ .name = "fault", },
{ .name = "routing", },
{ .name = "buffers", },
{ .name = "numa", },
};
static const struct genl_ops lnet_genl_ops[] = {
{
.cmd = LNET_CMD_CONFIGURE,
.flags = GENL_ADMIN_PERM,
.doit = lnet_net_conf_cmd,
},
{
.cmd = LNET_CMD_NETS,
.flags = GENL_ADMIN_PERM,
.start = lnet_net_show_start,
.dumpit = lnet_net_show_dump,
.done = lnet_net_show_done,
.doit = lnet_net_cmd,
},
{
.cmd = LNET_CMD_PEERS,
.flags = GENL_ADMIN_PERM,
.start = lnet_peer_ni_show_start,
.dumpit = lnet_peer_ni_show_dump,
.done = lnet_peer_ni_show_done,
.doit = lnet_peer_ni_cmd,
},
{
.cmd = LNET_CMD_ROUTES,
.flags = GENL_ADMIN_PERM,
.start = lnet_route_show_start,
.dumpit = lnet_route_show_dump,
.done = lnet_route_show_done,
.doit = lnet_route_cmd,
},
{
.cmd = LNET_CMD_PING,
.flags = GENL_ADMIN_PERM,
.start = lnet_ping_show_start,
.dumpit = lnet_ping_show_dump,
.done = lnet_ping_show_done,
.doit = lnet_ping_cmd,
},
{
.cmd = LNET_CMD_CPT_OF_NID,
.start = lnet_cpt_of_nid_show_start,
.dumpit = lnet_cpt_of_nid_show_dump,
.done = lnet_cpt_of_nid_show_done,
},
{
.cmd = LNET_CMD_PEER_DIST,
.start = lnet_peer_dist_show_start,
.dumpit = lnet_peer_dist_show_dump,
.done = lnet_peer_dist_show_done,
},
{
.cmd = LNET_CMD_PEER_FAIL,
.flags = GENL_ADMIN_PERM,
.doit = lnet_peer_fail_cmd,
},
{
.cmd = LNET_CMD_DBG_RECOV,
.flags = GENL_ADMIN_PERM,
.start = lnet_debug_recovery_show_start,
.dumpit = lnet_debug_recovery_show_dump,
.done = lnet_debug_recovery_show_done,
},
{
.cmd = LNET_CMD_FAULT,
.flags = GENL_ADMIN_PERM,
.start = lnet_fault_show_start,
.dumpit = lnet_fault_show_dump,
.done = lnet_fault_show_done,
.doit = lnet_fault_cmd,
},
{
.cmd = LNET_CMD_ROUTING,
.flags = GENL_ADMIN_PERM,
.doit = lnet_routing_cmd,
},
{
.cmd = LNET_CMD_BUFFERS,
.flags = GENL_ADMIN_PERM,
.doit = lnet_buffers_cmd,
},
{
.cmd = LNET_CMD_NUMA,
.flags = GENL_ADMIN_PERM,
.doit = lnet_numa_cmd,
},
};
static struct genl_family lnet_family = {
.name = LNET_GENL_NAME,
.version = LNET_GENL_VERSION,
.module = THIS_MODULE,
.parallel_ops = true,
.netnsok = true,
.ops = lnet_genl_ops,
.n_ops = ARRAY_SIZE(lnet_genl_ops),
.mcgrps = lnet_mcast_grps,
.n_mcgrps = ARRAY_SIZE(lnet_mcast_grps),
#ifdef GENL_FAMILY_HAS_RESV_START_OP
.resv_start_op = __LNET_CMD_MAX_PLUS_ONE,
#endif
};
void LNetDebugPeer(struct lnet_processid *id)
{
lnet_debug_peer(&id->nid);
}
EXPORT_SYMBOL(LNetDebugPeer);
/**
* LNetIsPeerLocal() - Determine if the specified peer @nid is on the local node.
* @nid: peer nid to check
*
* Return:
* * %true If peer NID is on the local node.
* * %false If peer NID is not on the local node.
*/
bool LNetIsPeerLocal(struct lnet_nid *nid)
{
struct lnet_net *net;
struct lnet_ni *ni;
int cpt;
cpt = lnet_net_lock_current();
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
if (net->net_id != LNET_NID_NET(nid))
continue;
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (nid_same(&ni->ni_nid, nid)) {
lnet_net_unlock(cpt);
return true;
}
}
}
lnet_net_unlock(cpt);
return false;
}
EXPORT_SYMBOL(LNetIsPeerLocal);
/**
* LNetFetchNIDs() - Retrieve an array of lnet_nid NIDs grouped by networks or
* for particular network only.
* @cb: callback to pass each new NID to.
* @netid: if not LNET_NET_ANY then fetch only NIDs on that @netid
* @data: caller data to pass through.
*
* Callback is called for each found NID, so that is up to caller
* how to handle and organize them.
*
* Return %0 or error code from callback
*/
int LNetFetchNIDs(int (*cb)(void *private, struct lnet_nid *nid),
__u32 netid, void *data)
{
struct lnet_net *net;
struct lnet_ni *ni;
int rc = 0;
mutex_lock(&the_lnet.ln_api_mutex);
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
if (netid != LNET_NET_ANY && netid != net->net_id)
continue;
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
rc = cb(data, &ni->ni_nid);
if (rc < 0)
goto err_unlock;
}
}
err_unlock:
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;
}
EXPORT_SYMBOL(LNetFetchNIDs);
/**
* LNetGetId() - Get struct lnet_process_id ID of LNet interface at @index.
* @index: Index of the interface to look up.
* @id: On successful return, this location will hold the
* struct lnet_process_id ID of the interface.
* @large_nids: Report large NIDs if this is true.
*
* Retrieve the struct lnet_process_id ID of LNet interface at @index.
* Note that all interfaces share a same PID, as requested by LNetNIInit().
*
* Return:
* * %0 if an interface exists at @index
* * %-ENOENT if no interface has been found
*/
int
LNetGetId(unsigned int index, struct lnet_processid *id, bool large_nids)
{
struct lnet_ni *ni;
struct lnet_net *net;
int cpt;
int rc = -ENOENT;
LASSERT(the_lnet.ln_refcount > 0);
cpt = lnet_net_lock_current();
list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
if (!large_nids && !nid_is_nid4(&ni->ni_nid))
continue;
if (index-- != 0)
continue;
id->nid = ni->ni_nid;
id->pid = the_lnet.ln_pid;
rc = 0;
break;
}
}
lnet_net_unlock(cpt);
return rc;
}
EXPORT_SYMBOL(LNetGetId);
struct ping_data {
int rc;
int replied;
int pd_unlinked;
struct lnet_handle_md mdh;
struct completion completion;
};
static void
lnet_ping_event_handler(struct lnet_event *event)
{
struct ping_data *pd = event->md_user_ptr;
CDEBUG(D_NET, "ping event (%d %d)%s\n",
event->type, event->status,
event->unlinked ? " unlinked" : "");
if (event->status) {
if (!pd->rc)
pd->rc = event->status;
} else if (event->type == LNET_EVENT_REPLY) {
pd->replied = 1;
pd->rc = event->mlength;
}
if (event->unlinked)
pd->pd_unlinked = 1;
if (event->unlinked ||
(event->type == LNET_EVENT_SEND && event->status))
complete(&pd->completion);
}
/* Max buffer we allow to be sent. Larger values will cause IB failures */
#define LNET_PING_BUFFER_MAX 3960
/*
* Rather than deal with LNet routing trickery, just build the message
* ourselves and send it over a network interface of our choosing.
*/
static int
LNetGetForce(struct lnet_ni *ni, struct lnet_handle_md mdh,
struct lnet_processid *target, unsigned int portal,
__u64 match_bits, unsigned int offset)
{
struct lnet_libmd *md;
struct lnet_msg *msg;
int cpt, rc;
LASSERT(the_lnet.ln_refcount > 0);
msg = lnet_msg_alloc();
if (!msg) {
CERROR("Dropping GET to %s: ENOMEM on struct lnet_msg\n",
libcfs_idstr(target));
return -ENOMEM;
}
cpt = lnet_cpt_of_cookie(mdh.cookie);
lnet_res_lock(cpt);
md = lnet_handle2md(&mdh);
if (!md || md->md_threshold == 0 || md->md_me) {
CERROR("Dropping GET (%llu:%d:%s): MD (%d) invalid\n",
match_bits, portal, libcfs_idstr(target),
!md ? -1 : md->md_threshold);
if (md && md->md_me)
CERROR("REPLY MD also attached to portal %d\n",
md->md_me->me_portal);
lnet_res_unlock(cpt);
lnet_msg_free(msg);
return -ENOENT;
}
lnet_msg_attach_md(msg, md, 0, 0);
lnet_prep_send(msg, LNET_MSG_GET, target, 0, 0);
msg->msg_hdr.msg.get.match_bits = cpu_to_le64(match_bits);
msg->msg_hdr.msg.get.ptl_index = cpu_to_le32(portal);
msg->msg_hdr.msg.get.src_offset = cpu_to_le32(offset);
msg->msg_hdr.msg.get.sink_length = cpu_to_le32(md->md_length);
/* NB handles only looked up by creator (no flips) */
msg->msg_hdr.msg.get.return_wmd.wh_interface_cookie =
the_lnet.ln_interface_cookie;
msg->msg_hdr.msg.get.return_wmd.wh_object_cookie =
md->md_lh.lh_cookie;
msg->msg_hdr.src_nid = ni->ni_nid;
msg->msg_hdr.src_pid = the_lnet.ln_pid;
lnet_res_unlock(cpt);
lnet_build_msg_event(msg, LNET_EVENT_SEND);
rc = (ni->ni_net->net_lnd->lnd_send)(ni, msg->msg_private, msg);
if (rc < 0) {
msg->msg_no_resend = true;
lnet_finalize(msg, rc);
}
return 0;
}
static void lnet_dump_nid_metadata(struct lnet_nid_metadata *data)
{
struct lnet_nid_md_entry tmp;
int i = 0;
if (CFS_FAIL_CHECK(CFS_FAIL_TEST_PING_MD)) {
pr_info("Ping reply received with mapping:\n");
lnet_poison_nid_md_buffer(&tmp);
LASSERT(data->num_nid_mappings);
for (i = 0; i < data->num_nid_mappings; i++) {
pr_info("found metadata reply NI[%s]\n",
libcfs_nid2str(data->nid_mappings[i].nid));
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16,
1, &data->nid_mappings[i],
sizeof(struct lnet_nid_md_entry),
false);
LASSERT(memcmp(&tmp.buffer, &data->nid_mappings[i].buffer,
LNET_MD_BUFFER_SZ) == 0);
}
}
}
/**
* lnet_discover_nid_metadata() - Ping NID using any interface.
* @id: Peer that should be pinged.
* @timeout: Time caller is willing to wait for response.
* @data: Buffer to hold remote NID metadata.
*
* This is a clone of lnet_ping() that doesn't copy anything to
* userspace and forces the ping to be sent from a particular NI.
* This clone is intended to provide a simple interface for
* sending LNet pings initiated from kernel space.
*/
int lnet_discover_nid_metadata(struct lnet_processid *id,
signed long timeout,
struct lnet_nid_metadata *data)
{
struct lnet_nid_metadata *data_tmp;
int n_ids = lnet_interfaces_max;
struct lnet_ping_buffer *pbuf;
struct ping_data pd = { 0 };
struct lnet_md md = { 0 };
struct lnet_ni *ni;
int id_bytes;
int nob;
int rc2;
int rc;
CDEBUG(D_NET, "handshake with NID: %s\n", libcfs_nidstr(&id->nid));
if (LNET_NID_IS_ANY(&id->nid)) {
rc = -EINVAL;
CDEBUG(D_NET, "refusing to handshake LNET_NID_ANY: rc = %d\n",
rc);
return rc;
}
ni = lnet_net2ni_locked(LNET_NID_NET(&id->nid), 0);
if (!ni) {
rc = -ENOENT;
CERROR("Can't find valid local NI: rc = %d\n", rc);
return rc;
}
id_bytes = lnet_get_ni_bytes();
id_bytes += lnet_extra_bytes_for_md();
if (id_bytes > LNET_PING_BUFFER_MAX)
id_bytes = LNET_PING_BUFFER_MAX;
pbuf = lnet_ping_buffer_alloc(id_bytes, GFP_NOFS);
if (!pbuf)
return -ENOMEM;
/* initialize md content */
md.umd_start = &pbuf->pb_info;
md.umd_length = id_bytes;
md.umd_threshold = 2; /* GET/REPLY */
md.umd_max_size = 0;
md.umd_options = LNET_MD_TRUNCATE;
md.umd_user_ptr = &pd;
md.umd_handler = lnet_ping_event_handler;
init_completion(&pd.completion);
rc = LNetMDBind(&md, LNET_UNLINK, &pd.mdh);
if (rc != 0) {
CERROR("Can't bind MD: rc = %d\n", rc);
goto fail_ping_buffer_decref;
}
rc = LNetGetForce(ni, pd.mdh, id, LNET_RESERVED_PORTAL,
LNET_PROTO_PING_MATCHBITS, 0);
if (rc != 0) {
/* Don't CERROR; this could be deliberate! */
rc2 = LNetMDUnlink(pd.mdh);
LASSERT(rc2 == 0);
/* NB must wait for the UNLINK event below... */
}
if (wait_for_completion_timeout(&pd.completion, timeout) == 0) {
/* Ensure completion in finite time... */
LNetMDUnlink(pd.mdh);
wait_for_completion(&pd.completion);
}
if (!pd.replied) {
rc = -EIO;
CDEBUG(D_NET, "misc ping error: rc = %d\n", rc);
goto fail_ping_buffer_decref;
}
nob = pd.rc;
LASSERT(nob >= 0 && nob <= id_bytes);
rc = -EPROTO; /* if I can't parse... */
if (nob < LNET_PING_INFO_HDR_SIZE) {
CERROR("%s: Short reply %d(%lu min): rc = %d\n",
libcfs_idstr(id), nob, LNET_PING_INFO_HDR_SIZE,
rc);
goto fail_ping_buffer_decref;
}
if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
lnet_swap_pinginfo(pbuf);
} else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
CERROR("%s: Unexpected magic %08x: rc = %d\n",
libcfs_idstr(id), pbuf->pb_info.pi_magic, rc);
goto fail_ping_buffer_decref;
}
if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
CERROR("%s: ping w/o NI status: 0x%x: rc = %d\n",
libcfs_idstr(id), pbuf->pb_info.pi_features, rc);
goto fail_ping_buffer_decref;
}
if (pbuf->pb_info.pi_nnis < n_ids) {
n_ids = pbuf->pb_info.pi_nnis;
id_bytes = lnet_ping_info_size(&pbuf->pb_info);
}
if (nob < id_bytes) {
CERROR("%s: Short reply %d(%d expected): rc = %d\n",
libcfs_idstr(id), nob, id_bytes, rc);
goto fail_ping_buffer_decref;
}
if (!lnet_peer_has_metadata(pbuf)) {
CERROR("%s: Peer has no metadata: rc = %d\n",
libcfs_idstr(id), rc);
goto fail_ping_buffer_decref;
}
/* Extract the mapping from the ping buffer we received */
data_tmp = (struct lnet_nid_metadata *)&pbuf->pb_info.pi_ni[n_ids];
if (data_tmp->num_nid_mappings == 0 ||
data_tmp->num_nid_mappings > lnet_interfaces_max) {
CERROR("%s: Unexpected number of handshake entries %i: rc = %d\n",
libcfs_idstr(id), data_tmp->num_nid_mappings, rc);
goto fail_ping_buffer_decref;
}
rc = 0;
if (data)
memcpy(data, data_tmp,
lnet_size_of_metadata(data_tmp->num_nid_mappings));
lnet_dump_nid_metadata(data_tmp);
fail_ping_buffer_decref:
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
return rc;
}
EXPORT_SYMBOL(lnet_discover_nid_metadata);
static int lnet_ping(struct lnet_processid *id, struct lnet_nid *src_nid,
signed long timeout, struct lnet_genl_ping_list *plist,
int n_ids)
{
int id_bytes = sizeof(struct lnet_ni_status); /* For 0@lo */
struct lnet_md md = { NULL };
struct ping_data pd = { 0 };
struct lnet_ping_buffer *pbuf;
struct lnet_processid pid;
struct lnet_ping_iter pi;
int i = 0;
u32 *st;
int nob;
int rc;
int rc2;
genradix_init(&plist->lgpl_list);
/* n_ids limit is arbitrary */
if (n_ids <= 0 || LNET_NID_IS_ANY(&id->nid))
return -EINVAL;
/* if the user buffer has more space than the lnet_interfaces_max
* then only fill it up to lnet_interfaces_max
*/
if (n_ids > lnet_interfaces_max)
n_ids = lnet_interfaces_max;
if (id->pid == LNET_PID_ANY)
id->pid = LNET_PID_LUSTRE;
/* Allocate maximum possible NID size */
id_bytes += lnet_ping_sts_size(&LNET_ANY_NID) * n_ids;
if (id_bytes > LNET_PING_BUFFER_MAX)
id_bytes = LNET_PING_BUFFER_MAX;
pbuf = lnet_ping_buffer_alloc(id_bytes, GFP_NOFS);
if (!pbuf)
return -ENOMEM;
/* initialize md content */
md.umd_start = &pbuf->pb_info;
md.umd_length = id_bytes;
md.umd_threshold = 2; /* GET/REPLY */
md.umd_max_size = 0;
md.umd_options = LNET_MD_TRUNCATE;
md.umd_user_ptr = &pd;
md.umd_handler = lnet_ping_event_handler;
init_completion(&pd.completion);
rc = LNetMDBind(&md, LNET_UNLINK, &pd.mdh);
if (rc != 0) {
CERROR("Can't bind MD: %d\n", rc);
goto fail_ping_buffer_decref;
}
rc = LNetGet(src_nid, pd.mdh, id, LNET_RESERVED_PORTAL,
LNET_PROTO_PING_MATCHBITS, 0, false);
if (rc != 0) {
/* Don't CERROR; this could be deliberate! */
rc2 = LNetMDUnlink(pd.mdh);
LASSERT(rc2 == 0);
/* NB must wait for the UNLINK event below... */
}
/* Ensure completion in finite time... */
wait_for_completion_timeout(&pd.completion, timeout);
if (!pd.pd_unlinked) {
LNetMDUnlink(pd.mdh);
wait_for_completion(&pd.completion);
}
if (!pd.replied) {
rc = pd.rc ?: -EIO;
goto fail_ping_buffer_decref;
}
nob = pd.rc;
LASSERT(nob >= 0 && nob <= id_bytes);
rc = -EPROTO; /* if I can't parse... */
if (nob < LNET_PING_INFO_HDR_SIZE) {
CERROR("%s: ping info too short %d\n",
libcfs_idstr(id), nob);
goto fail_ping_buffer_decref;
}
if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
lnet_swap_pinginfo(pbuf);
} else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
CERROR("%s: Unexpected magic %08x\n",
libcfs_idstr(id), pbuf->pb_info.pi_magic);
goto fail_ping_buffer_decref;
}
if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
CERROR("%s: ping w/o NI status: 0x%x\n",
libcfs_idstr(id), pbuf->pb_info.pi_features);
goto fail_ping_buffer_decref;
}
/* Test if smaller than lnet_pinginfo with just one pi_ni status info.
* That one might contain size when large nids are used.
*/
if (nob < offsetof(struct lnet_ping_info, pi_ni[1])) {
CERROR("%s: Short reply %d(%lu min)\n",
libcfs_idstr(id), nob,
offsetof(struct lnet_ping_info, pi_ni[1]));
goto fail_ping_buffer_decref;
}
if (ping_info_count_entries(pbuf) < n_ids) {
n_ids = ping_info_count_entries(pbuf);
id_bytes = lnet_ping_info_size(&pbuf->pb_info);
}
if (nob < id_bytes) {
CERROR("%s: Short reply %d(%d expected)\n",
libcfs_idstr(id), nob, id_bytes);
goto fail_ping_buffer_decref;
}
for (st = ping_iter_first(&pi, pbuf, &pid.nid);
st;
st = ping_iter_next(&pi, &pid.nid)) {
id = genradix_ptr_alloc(&plist->lgpl_list, i++, GFP_KERNEL);
if (!id) {
rc = -ENOMEM;
goto fail_ping_buffer_decref;
}
id->pid = pbuf->pb_info.pi_pid;
id->nid = pid.nid;
}
rc = i;
fail_ping_buffer_decref:
kref_put(&pbuf->pb_refcnt, lnet_ping_buffer_free);
return rc;
}
static int
lnet_discover(struct lnet_processid *pid, u32 force,
struct lnet_genl_ping_list *dlist)
{
struct lnet_peer_ni *lpni;
struct lnet_peer_ni *p;
struct lnet_peer *lp;
int cpt;
int rc;
if (LNET_NID_IS_ANY(&pid->nid))
return -EINVAL;
if (pid->pid == LNET_PID_ANY)
pid->pid = LNET_PID_LUSTRE;
cpt = lnet_net_lock_current();
lpni = lnet_peerni_by_nid_locked(&pid->nid, NULL, cpt);
if (IS_ERR(lpni)) {
rc = PTR_ERR(lpni);
goto out;
}
/*
* Clearing the NIDS_UPTODATE flag ensures the peer will
* be discovered, provided discovery has not been disabled.
*/
lp = lpni->lpni_peer_net->lpn_peer;
spin_lock(&lp->lp_lock);
lp->lp_state &= ~LNET_PEER_NIDS_UPTODATE;
/* If the force flag is set, force a PING and PUSH as well. */
if (force)
lp->lp_state |= LNET_PEER_FORCE_PING | LNET_PEER_FORCE_PUSH;
spin_unlock(&lp->lp_lock);
rc = lnet_discover_peer_locked(lpni, cpt, true);
if (rc)
goto out_decref;
/* The lpni (or lp) for this NID may have changed and our ref is
* the only thing keeping the old one around. Release the ref
* and lookup the lpni again
*/
lnet_peer_ni_decref_locked(lpni);
lpni = lnet_peer_ni_find_locked(&pid->nid);
if (!lpni) {
rc = -ENOENT;
goto out;
}
lp = lpni->lpni_peer_net->lpn_peer;
dlist->lgpl_list_count = 0;
p = NULL;
while ((p = lnet_get_next_peer_ni_locked(lp, NULL, p)) != NULL) {
struct lnet_processid *id;
id = genradix_ptr_alloc(&dlist->lgpl_list,
dlist->lgpl_list_count++, GFP_ATOMIC);
if (!id) {
rc = -ENOMEM;
goto out_decref;
}
id->pid = pid->pid;
id->nid = p->lpni_nid;
}
rc = dlist->lgpl_list_count;
out_decref:
lnet_peer_ni_decref_locked(lpni);
out:
lnet_net_unlock(cpt);
return rc;
}
/**
* LNetGetPeerDiscoveryStatus() - Retrieve peer discovery status.
*
* Return:
* * %1 if lnet_peer_discovery_disabled is 0
* * %0 if lnet_peer_discovery_disabled is 1
*/
int
LNetGetPeerDiscoveryStatus(void)
{
return !lnet_peer_discovery_disabled;
}
EXPORT_SYMBOL(LNetGetPeerDiscoveryStatus);
