Viewing: lib-lnet.h
// 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) 2012, 2017, Intel Corporation.
*/
/* This file is part of Lustre, http://www.lustre.org/
*
* Top level include for library side routines
*/
#ifndef __LNET_LIB_LNET_H__
#define __LNET_LIB_LNET_H__
/* LNET has 0xeXXX */
#define CFS_FAIL_PTLRPC_OST_BULK_CB2 0xe000
#define CFS_FAIL_MATCH_MD_NID 0xe001
#define CFS_FAIL_DELAY_MSG_FORWARD 0xe002
#define CFS_FAIL_TEST_PING_MD 0xe003
#define CFS_FAIL_RTR_HEALTH_INC 0xe004
#include <linux/hash.h>
#include <linux/netdevice.h>
#include <linux/libcfs/libcfs_debug.h>
#include <linux/libcfs/libcfs_private.h>
#include <linux/lnet/api.h>
#include <linux/lnet/lib-cpt.h>
#include <linux/lnet/lib-types.h>
#include <uapi/linux/lnet/lnet-dlc.h>
#include <uapi/linux/lnet/lnet-types.h>
#include <uapi/linux/lnet/lnetctl.h>
#include <uapi/linux/lnet/nidstr.h>
#include "lock.h"
extern struct lnet the_lnet; /* THE network */
#if (BITS_PER_LONG == 32)
/* 2 CPTs, allowing more CPTs might make us under memory pressure */
# define LNET_CPT_MAX_BITS 1
#else /* 64-bit system */
/*
* 256 CPTs for thousands of CPUs, allowing more CPTs might make us
* under risk of consuming all lh_cookie.
*/
# define LNET_CPT_MAX_BITS 8
#endif /* BITS_PER_LONG == 32 */
/* max allowed CPT number */
#define LNET_CPT_MAX (1 << LNET_CPT_MAX_BITS)
#define LNET_CPT_NUMBER (the_lnet.ln_cpt_number)
#define LNET_CPT_BITS (the_lnet.ln_cpt_bits)
#define LNET_CPT_MASK ((1ULL << LNET_CPT_BITS) - 1)
/** exclusive lock */
#define LNET_LOCK_EX CFS_PERCPT_LOCK_EX
/* need both kernel and user-land acceptor */
#define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
#define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
/* default timeout and credits */
#define DEFAULT_PEER_TIMEOUT 180
#define DEFAULT_PEER_CREDITS 8
#define DEFAULT_CREDITS 256
/* default number of connections per peer */
#define DEFAULT_CONNS_PER_PEER 0
int choose_ipv4_src(u32 *ret,
int interface, u32 dst_ipaddr, struct net *ns);
bool lnet_is_route_alive(struct lnet_route *route);
bool lnet_is_gateway_alive(struct lnet_peer *gw);
static inline int lnet_is_wire_handle_none(struct lnet_handle_wire *wh)
{
return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&
wh->wh_object_cookie == LNET_WIRE_HANDLE_COOKIE_NONE);
}
static inline int lnet_md_exhausted(struct lnet_libmd *md)
{
return (md->md_threshold == 0 ||
((md->md_options & LNET_MD_MAX_SIZE) != 0 &&
md->md_offset + md->md_max_size > md->md_length));
}
static inline int lnet_md_unlinkable(struct lnet_libmd *md)
{
/* Should unlink md when its refcount is 0 and either:
* - md has been flagged for deletion (by auto unlink or LNetM[DE]Unlink,
* in the latter case md may not be exhausted).
* - auto unlink is on and md is exhausted.
*/
if (md->md_refcount != 0)
return 0;
if ((md->md_flags & LNET_MD_FLAG_ZOMBIE) != 0)
return 1;
return ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
lnet_md_exhausted(md));
}
#define lnet_cpt_table() (the_lnet.ln_cpt_table)
#define lnet_cpt_current() cfs_cpt_current(the_lnet.ln_cpt_table, 1)
static inline int
lnet_cpt_of_cookie(__u64 cookie)
{
unsigned int cpt = (cookie >> LNET_COOKIE_TYPE_BITS) & LNET_CPT_MASK;
/* LNET_CPT_NUMBER doesn't have to be power2, which means we can
* get illegal cpt from it's invalid cookie */
return cpt < LNET_CPT_NUMBER ? cpt : cpt % LNET_CPT_NUMBER;
}
static inline void
lnet_res_lock(int cpt)
{
cfs_percpt_lock(the_lnet.ln_res_lock, cpt);
}
static inline void
lnet_res_unlock(int cpt)
{
cfs_percpt_unlock(the_lnet.ln_res_lock, cpt);
}
static inline int
lnet_res_lock_current(void)
{
int cpt = lnet_cpt_current();
lnet_res_lock(cpt);
return cpt;
}
static inline void
lnet_net_lock(int cpt)
{
cfs_percpt_lock(the_lnet.ln_net_lock, cpt);
}
static inline void
lnet_net_unlock(int cpt)
{
cfs_percpt_unlock(the_lnet.ln_net_lock, cpt);
}
static inline int
lnet_net_lock_current(void)
{
int cpt = lnet_cpt_current();
lnet_net_lock(cpt);
return cpt;
}
#define LNET_LOCK() lnet_net_lock(LNET_LOCK_EX)
#define LNET_UNLOCK() lnet_net_unlock(LNET_LOCK_EX)
#define lnet_ptl_lock(ptl) spin_lock(&(ptl)->ptl_lock)
#define lnet_ptl_unlock(ptl) spin_unlock(&(ptl)->ptl_lock)
#define lnet_ni_lock(ni) spin_lock(&(ni)->ni_lock)
#define lnet_ni_unlock(ni) spin_unlock(&(ni)->ni_lock)
#define MAX_PORTALS 64
#define LNET_SMALL_MD_SIZE offsetof(struct lnet_libmd, md_kiov[1])
extern struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
extern struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
* MDs kmem_cache */
extern struct kmem_cache *lnet_udsp_cachep;
extern struct kmem_cache *lnet_rspt_cachep;
extern struct kmem_cache *lnet_msg_cachep;
static inline bool
lnet_ni_set_status_locked(struct lnet_ni *ni, __u32 status)
__must_hold(&ni->ni_lock)
{
bool update = false;
if (ni->ni_status && *ni->ni_status != status) {
CDEBUG(D_NET, "ni %s status changed from %#x to %#x\n",
libcfs_nidstr(&ni->ni_nid),
*ni->ni_status, status);
*ni->ni_status = status;
update = true;
}
return update;
}
static inline unsigned int
lnet_ni_get_status_locked(struct lnet_ni *ni)
__must_hold(&ni->ni_lock)
{
if (nid_is_lo0(&ni->ni_nid))
return LNET_NI_STATUS_UP;
else if (atomic_read(&ni->ni_fatal_error_on))
return LNET_NI_STATUS_DOWN;
else if (ni->ni_status)
return *ni->ni_status;
else
return LNET_NI_STATUS_UP;
}
static inline bool
lnet_ni_set_status(struct lnet_ni *ni, __u32 status)
{
bool update;
lnet_ni_lock(ni);
update = lnet_ni_set_status_locked(ni, status);
lnet_ni_unlock(ni);
return update;
}
static inline unsigned int
lnet_ni_get_status(struct lnet_ni *ni)
{
unsigned int status;
lnet_ni_lock(ni);
status = lnet_ni_get_status_locked(ni);
lnet_ni_unlock(ni);
return status;
}
static inline void lnet_md_wait_handling(struct lnet_libmd *md, int cpt)
{
wait_queue_head_t *wq = __var_waitqueue(md);
#if defined(HAVE_WAIT_BIT_QUEUE_ENTRY) || !defined(HAVE_WAIT_VAR_EVENT)
struct wait_bit_queue_entry entry;
wait_queue_entry_t *wqe = &entry.wq_entry;
#else
struct wait_bit_queue entry;
wait_queue_entry_t *wqe = &entry.wait;
#endif
init_wait_var_entry(&entry, md, 0);
prepare_to_wait_event(wq, wqe, TASK_IDLE);
if (md->md_flags & LNET_MD_FLAG_HANDLING) {
/* Race with unlocked call to ->md_handler.
* It is safe to drop the res_lock here as the
* caller has only just claimed it.
*/
lnet_res_unlock(cpt);
schedule();
/* Cannot check md now, it might be freed. Caller
* must reclaim reference and check.
*/
lnet_res_lock(cpt);
}
finish_wait(wq, wqe);
}
static inline void
lnet_md_free(struct lnet_libmd *md)
{
unsigned int size;
LASSERTF(!md->md_rspt_ptr, "md %px rsp %px\n", md, md->md_rspt_ptr);
size = offsetof(struct lnet_libmd, md_kiov[md->md_niov]);
if (size <= LNET_SMALL_MD_SIZE) {
LIBCFS_MEM_MSG(md, size, "slab-freed");
kmem_cache_free(lnet_small_mds_cachep, md);
} else {
LIBCFS_FREE(md, size);
}
}
struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec,
__u64 cookie);
void lnet_res_lh_initialize(struct lnet_res_container *rec,
struct lnet_libhandle *lh);
static inline void
lnet_res_lh_invalidate(struct lnet_libhandle *lh)
{
/* ALWAYS called with resource lock held */
/* NB: cookie is still useful, don't reset it */
list_del(&lh->lh_hash_chain);
}
static inline void
lnet_md2handle(struct lnet_handle_md *handle, struct lnet_libmd *md)
{
handle->cookie = md->md_lh.lh_cookie;
}
static inline struct lnet_libmd *
lnet_handle2md(struct lnet_handle_md *handle)
{
/* ALWAYS called with resource lock held */
struct lnet_libhandle *lh;
int cpt;
cpt = lnet_cpt_of_cookie(handle->cookie);
lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
handle->cookie);
if (lh == NULL)
return NULL;
return lh_entry(lh, struct lnet_libmd, md_lh);
}
static inline struct lnet_libmd *
lnet_wire_handle2md(struct lnet_handle_wire *wh)
{
/* ALWAYS called with resource lock held */
struct lnet_libhandle *lh;
int cpt;
if (wh->wh_interface_cookie != the_lnet.ln_interface_cookie)
return NULL;
cpt = lnet_cpt_of_cookie(wh->wh_object_cookie);
lh = lnet_res_lh_lookup(the_lnet.ln_md_containers[cpt],
wh->wh_object_cookie);
if (lh == NULL)
return NULL;
return lh_entry(lh, struct lnet_libmd, md_lh);
}
static inline void
lnet_peer_net_addref_locked(struct lnet_peer_net *lpn)
{
atomic_inc(&lpn->lpn_refcount);
}
extern void lnet_destroy_peer_net_locked(struct lnet_peer_net *lpn);
static inline void
lnet_peer_net_decref_locked(struct lnet_peer_net *lpn)
{
if (atomic_dec_and_test(&lpn->lpn_refcount))
lnet_destroy_peer_net_locked(lpn);
}
static inline void
lnet_peer_addref_locked(struct lnet_peer *lp)
{
atomic_inc(&lp->lp_refcount);
}
extern void lnet_destroy_peer_locked(struct lnet_peer *lp);
static inline void
lnet_peer_decref_locked(struct lnet_peer *lp)
{
if (atomic_dec_and_test(&lp->lp_refcount))
lnet_destroy_peer_locked(lp);
}
extern void lnet_destroy_peer_ni_locked(struct kref *ref);
static inline void
lnet_peer_ni_decref_locked(struct lnet_peer_ni *lp)
{
kref_put(&lp->lpni_kref, lnet_destroy_peer_ni_locked);
}
static inline int
lnet_isrouter(struct lnet_peer_ni *lpni)
{
return lpni->lpni_peer_net->lpn_peer->lp_rtr_refcount != 0;
}
static inline void
lnet_ni_addref_locked(struct lnet_ni *ni, int cpt)
{
LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
LASSERT(*ni->ni_refs[cpt] >= 0);
(*ni->ni_refs[cpt])++;
}
static inline void
lnet_ni_addref(struct lnet_ni *ni)
{
lnet_net_lock(0);
lnet_ni_addref_locked(ni, 0);
lnet_net_unlock(0);
}
static inline void
lnet_ni_decref_locked(struct lnet_ni *ni, int cpt)
{
LASSERT(cpt >= 0 && cpt < LNET_CPT_NUMBER);
LASSERT(*ni->ni_refs[cpt] > 0);
(*ni->ni_refs[cpt])--;
}
static inline void
lnet_ni_decref(struct lnet_ni *ni)
{
lnet_net_lock(0);
lnet_ni_decref_locked(ni, 0);
lnet_net_unlock(0);
}
static inline struct lnet_msg *
lnet_msg_alloc(void)
{
struct lnet_msg *msg;
msg = kmem_cache_zalloc(lnet_msg_cachep, GFP_NOFS);
return (msg);
}
static inline void
lnet_msg_free(struct lnet_msg *msg)
{
LASSERT(!msg->msg_onactivelist);
kmem_cache_free(lnet_msg_cachep, msg);
}
static inline struct lnet_rsp_tracker *
lnet_rspt_alloc(int cpt)
{
struct lnet_rsp_tracker *rspt;
rspt = kmem_cache_zalloc(lnet_rspt_cachep, GFP_NOFS);
if (rspt) {
lnet_net_lock(cpt);
the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc++;
lnet_net_unlock(cpt);
}
LIBCFS_ALLOC_POST(rspt, sizeof(*rspt), "alloc");
return rspt;
}
static inline void
lnet_rspt_free(struct lnet_rsp_tracker *rspt, int cpt)
{
LIBCFS_FREE_PRE(rspt, sizeof(*rspt), "free");
kmem_cache_free(lnet_rspt_cachep, rspt);
lnet_net_lock(cpt);
the_lnet.ln_counters[cpt]->lct_health.lch_rst_alloc--;
lnet_net_unlock(cpt);
}
int lnet_configure(void *arg);
int lnet_unconfigure(void);
void lnet_ni_free(struct lnet_ni *ni);
void lnet_net_free(struct lnet_net *net);
struct lnet_net *
lnet_net_alloc(__u32 net_type, struct list_head *netlist);
struct lnet_ni *
lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el,
char *iface);
struct lnet_ni *
lnet_ni_alloc_w_cpt_array(struct lnet_net *net, struct lnet_nid *nid,
u32 *cpts, u32 ncpts, char *iface);
int lnet_ni_add_interface(struct lnet_ni *ni, char *iface);
static inline int
lnet_nid2peerhash(struct lnet_nid *nid)
{
u32 h = 0;
int i;
for (i = 0; i < 4; i++)
h = hash_32(nid->nid_addr[i]^h, 32);
return hash_32(LNET_NID_NET(nid) ^ h, LNET_PEER_HASH_BITS);
}
static inline struct list_head *
lnet_net2rnethash(__u32 net)
{
return &the_lnet.ln_remote_nets_hash[(LNET_NETNUM(net) +
LNET_NETTYP(net)) &
((1U << the_lnet.ln_remote_nets_hbits) - 1)];
}
static inline void lnet_hdr_from_nid4(struct lnet_hdr *hdr,
const struct lnet_hdr_nid4 *vhdr)
{
const struct _lnet_hdr_nid4 *hdr_nid4 = (void *)vhdr;
lnet_nid4_to_nid(le64_to_cpu(hdr_nid4->dest_nid), &hdr->dest_nid);
lnet_nid4_to_nid(le64_to_cpu(hdr_nid4->src_nid), &hdr->src_nid);
hdr->dest_pid = le32_to_cpu(hdr_nid4->dest_pid);
hdr->src_pid = le32_to_cpu(hdr_nid4->src_pid);
hdr->type = le32_to_cpu(hdr_nid4->type);
hdr->payload_length = le32_to_cpu(hdr_nid4->payload_length);
hdr->msg = hdr_nid4->msg;
}
static inline void lnet_hdr_to_nid4(const struct lnet_hdr *hdr,
struct lnet_hdr_nid4 *vhdr)
{
struct _lnet_hdr_nid4 *hdr_nid4 = (void *)vhdr;
hdr_nid4->dest_nid = cpu_to_le64(lnet_nid_to_nid4(&hdr->dest_nid));
hdr_nid4->src_nid = cpu_to_le64(lnet_nid_to_nid4(&hdr->src_nid));
hdr_nid4->dest_pid = cpu_to_le32(hdr->dest_pid);
hdr_nid4->src_pid = cpu_to_le32(hdr->src_pid);
hdr_nid4->type = cpu_to_le32(hdr->type);
hdr_nid4->payload_length = cpu_to_le32(hdr->payload_length);
hdr_nid4->msg = hdr->msg;
}
static inline void lnet_hdr_from_nid16(struct lnet_hdr *hdr,
const struct lnet_hdr_nid16 *vhdr)
{
const struct lnet_hdr *hdr16 = (void *)vhdr;
hdr->dest_nid = hdr16->dest_nid;
hdr->src_nid = hdr16->src_nid;
hdr->dest_pid = le32_to_cpu(hdr16->dest_pid);
hdr->src_pid = le32_to_cpu(hdr16->src_pid);
hdr->type = le32_to_cpu(hdr16->type);
hdr->payload_length = le32_to_cpu(hdr16->payload_length);
hdr->msg = hdr16->msg;
}
static inline void lnet_hdr_to_nid16(const struct lnet_hdr *hdr,
struct lnet_hdr_nid16 *vhdr)
{
struct lnet_hdr *hdr16 = (void *)vhdr;
hdr16->dest_nid = hdr->dest_nid;
hdr16->src_nid = hdr->src_nid;
hdr16->dest_pid = cpu_to_le32(hdr->dest_pid);
hdr16->src_pid = cpu_to_le32(hdr->src_pid);
hdr16->type = cpu_to_le32(hdr->type);
hdr16->payload_length = cpu_to_le32(hdr->payload_length);
hdr16->msg = hdr->msg;
}
extern const struct lnet_lnd the_lolnd;
extern int avoid_asym_router_failure;
extern unsigned int lnet_nid_cpt_hash(struct lnet_nid *nid,
unsigned int number);
extern int lnet_cpt_of_nid_locked(struct lnet_nid *nid, struct lnet_ni *ni);
extern int lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni);
extern int lnet_nid2cpt(struct lnet_nid *nid, struct lnet_ni *ni);
extern struct lnet_ni *lnet_nid_to_ni_locked(struct lnet_nid *nid, int cpt);
extern struct lnet_ni *lnet_net2ni_locked(__u32 net, int cpt);
extern struct lnet_ni *lnet_net2ni_addref(__u32 net);
extern struct lnet_ni *lnet_nid_to_ni_addref(struct lnet_nid *nid);
struct lnet_net *lnet_get_net_locked(__u32 net_id);
int lnet_lib_init(void);
void lnet_lib_exit(void);
void lnet_router_exit(void);
extern unsigned int lnet_response_tracking;
extern unsigned lnet_transaction_timeout;
extern unsigned lnet_retry_count;
extern unsigned int lnet_lnd_timeout;
extern unsigned int lnet_numa_range;
extern unsigned int lnet_health_sensitivity;
extern unsigned int lnet_recovery_interval;
extern unsigned int lnet_recovery_limit;
extern unsigned int lnet_peer_discovery_disabled;
extern unsigned int lnet_drop_asym_route;
extern unsigned int lnet_max_recovery_ping_interval;
extern unsigned int lnet_max_recovery_ping_count;
extern unsigned int router_sensitivity_percentage;
extern int alive_router_check_interval;
extern int live_router_check_interval;
extern int dead_router_check_interval;
extern int portal_rotor;
extern int lock_prim_nid;
extern int lnet_interfaces_max;
void lnet_mt_event_handler(struct lnet_event *event);
int lnet_notify(struct lnet_ni *ni, struct lnet_nid *peer, bool alive,
bool reset, time64_t when);
void lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive,
time64_t when);
int lnet_add_route(__u32 net, __u32 hops, struct lnet_nid *gateway,
__u32 priority);
int lnet_del_route(__u32 net, struct lnet_nid *gw_nid);
void lnet_move_route(struct lnet_route *route, struct lnet_peer *lp,
struct list_head *rt_list);
void lnet_destroy_routes(void);
int lnet_get_route(int idx, __u32 *net, __u32 *hops,
lnet_nid_t *gateway, __u32 *alive, __u32 *priority);
int lnet_get_rtr_pool_cfg(int idx, struct lnet_ioctl_pool_cfg *pool_cfg);
struct lnet_ni *lnet_get_next_ni_locked(struct lnet_net *mynet,
struct lnet_ni *prev);
struct lnet_ni *lnet_get_ni_idx_locked(int idx);
int lnet_get_net_healthv_locked(struct lnet_net *net);
extern int lnet_get_peer_list(__u32 *countp, __u32 *sizep,
struct lnet_process_id __user *ids);
void lnet_peer_ni_set_healthv(struct lnet_nid *nid, int value, bool all);
extern void lnet_peer_ni_add_to_recoveryq_locked(struct lnet_peer_ni *lpni,
struct list_head *queue,
time64_t now);
extern int lnet_peer_add_pref_nid(struct lnet_peer_ni *lpni,
struct lnet_nid *nid);
extern void lnet_peer_clr_pref_nids(struct lnet_peer_ni *lpni);
void lnet_peer_ni_set_selection_priority(struct lnet_peer_ni *lpni,
__u32 priority);
extern void lnet_ni_add_to_recoveryq_locked(struct lnet_ni *ni,
struct list_head *queue,
time64_t now);
void lnet_router_debugfs_init(void);
void lnet_router_debugfs_fini(void);
int lnet_rtrpools_alloc(int im_a_router);
void lnet_destroy_rtrbuf(struct lnet_rtrbuf *rb, int npages);
int lnet_rtrpools_adjust(int tiny, int small, int large);
int lnet_rtrpools_enable(void);
void lnet_rtrpools_disable(void);
void lnet_rtrpools_free(int keep_pools);
void lnet_rtr_transfer_to_peer(struct lnet_peer *src,
struct lnet_peer *target);
struct lnet_remotenet *lnet_find_rnet_locked(__u32 net);
int lnet_dyn_add_net(struct lnet_ioctl_config_data *conf);
int lnet_dyn_del_net(__u32 net);
int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf, u32 net,
struct lnet_nid *nid,
struct lnet_ioctl_config_lnd_tunables *tun);
int lnet_dyn_del_ni(struct lnet_nid *nid, bool allow_net_del);
int lnet_clear_lazy_portal(struct lnet_ni *ni, int portal, char *reason);
struct lnet_net *lnet_get_net_locked(__u32 net_id);
void lnet_net_clr_pref_rtrs(struct lnet_net *net);
int lnet_net_add_pref_rtr(struct lnet_net *net, struct lnet_nid *gw_nid);
int lnet_islocalnid(struct lnet_nid *nid);
int lnet_islocalnet(__u32 net);
int lnet_islocalnet_locked(__u32 net);
void lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
unsigned int offset, unsigned int mlen);
void lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev);
void lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type);
void lnet_msg_commit(struct lnet_msg *msg, int cpt);
void lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status);
void lnet_prep_send(struct lnet_msg *msg, int type,
struct lnet_processid *target, unsigned int offset,
unsigned int len);
int lnet_send(struct lnet_nid *nid, struct lnet_msg *msg,
struct lnet_nid *rtr_nid);
int lnet_send_ping(struct lnet_nid *dest_nid, struct lnet_handle_md *mdh,
int bytes, void *user_ptr, lnet_handler_t handler,
bool recovery);
void lnet_return_tx_credits_locked(struct lnet_msg *msg);
void lnet_return_rx_credits_locked(struct lnet_msg *msg);
void lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp);
void lnet_drop_routed_msgs_locked(struct list_head *list, int cpt);
int lnet_discover_nid_metadata(struct lnet_processid *id,
signed long timeout,
struct lnet_nid_metadata *data);
struct list_head **lnet_create_array_of_queues(void);
/* portals functions */
/* portals attributes */
static inline int
lnet_ptl_is_lazy(struct lnet_portal *ptl)
{
return !!(ptl->ptl_options & LNET_PTL_LAZY);
}
static inline int
lnet_ptl_is_unique(struct lnet_portal *ptl)
{
return !!(ptl->ptl_options & LNET_PTL_MATCH_UNIQUE);
}
static inline int
lnet_ptl_is_wildcard(struct lnet_portal *ptl)
{
return !!(ptl->ptl_options & LNET_PTL_MATCH_WILDCARD);
}
static inline void
lnet_ptl_setopt(struct lnet_portal *ptl, int opt)
{
ptl->ptl_options |= opt;
}
static inline void
lnet_ptl_unsetopt(struct lnet_portal *ptl, int opt)
{
ptl->ptl_options &= ~opt;
}
/* match-table functions */
struct list_head *lnet_mt_match_head(struct lnet_match_table *mtable,
struct lnet_processid *id, __u64 mbits);
struct lnet_match_table *lnet_mt_of_attach(unsigned int index,
struct lnet_processid *id,
__u64 mbits, __u64 ignore_bits,
enum lnet_ins_pos pos);
int lnet_mt_match_md(struct lnet_match_table *mtable,
struct lnet_match_info *info, struct lnet_msg *msg);
/* portals match/attach functions */
void lnet_ptl_attach_md(struct lnet_me *me, struct lnet_libmd *md,
struct list_head *matches, struct list_head *drops);
void lnet_ptl_detach_md(struct lnet_me *me, struct lnet_libmd *md);
int lnet_ptl_match_md(struct lnet_match_info *info, struct lnet_msg *msg);
/* initialized and finalize portals */
int lnet_portals_create(void);
void lnet_portals_destroy(void);
/* message functions */
int lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr,
struct lnet_nid *fromnid, void *private, int rdma_req);
int lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg);
int lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg);
void lnet_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
int delayed, unsigned int offset, unsigned int mlen,
unsigned int rlen);
void lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
int delayed, unsigned int offset,
unsigned int mlen, unsigned int rlen);
void lnet_ni_send(struct lnet_ni *ni, struct lnet_msg *msg);
struct lnet_msg *lnet_create_reply_msg(struct lnet_ni *ni,
struct lnet_msg *get_msg);
void lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *msg,
unsigned int len);
void lnet_detach_rsp_tracker(struct lnet_libmd *md, int cpt);
void lnet_clean_zombie_rstqs(void);
void lnet_finalize(struct lnet_msg *msg, int rc);
bool lnet_send_error_simulation(struct lnet_msg *msg,
enum lnet_msg_hstatus *hstatus);
void lnet_handle_remote_failure_locked(struct lnet_peer_ni *lpni);
void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private,
unsigned int nob, __u32 msg_type);
void lnet_drop_delayed_msg_list(struct list_head *head, char *reason);
void lnet_recv_delayed_msg_list(struct list_head *head);
int lnet_msg_container_setup(struct lnet_msg_container *container, int cpt);
void lnet_msg_container_cleanup(struct lnet_msg_container *container);
void lnet_msg_containers_destroy(void);
int lnet_msg_containers_create(void);
char *lnet_health_error2str(enum lnet_msg_hstatus hstatus);
char *lnet_msgtyp2str(int type);
int lnet_fail_nid(struct lnet_nid *nid, unsigned int threshold);
/** \addtogroup lnet_fault_simulation @{ */
/* See struct lnet_fault_attr for a description of these fields */
struct lnet_fault_large_attr {
struct lnet_nid fa_src;
struct lnet_nid fa_dst;
struct lnet_nid fa_local_nid;
u64 fa_ptl_mask;
u32 fa_msg_mask;
union {
struct {
u32 da_rate;
u32 da_interval;
u32 da_health_error_mask;
u32 da_random:1,
da_drop_all:1;
} drop;
struct {
u32 la_rate;
u32 la_interval;
u32 la_latency;
} delay;
u64 space[8];
} u;
};
struct lnet_rule_properties {
struct lnet_fault_large_attr attr;
struct lnet_fault_stat stat;
};
struct lnet_genl_fault_rule_list {
unsigned int lgfrl_index;
unsigned int lgfrl_count;
u32 lgfrl_opc;
GENRADIX(struct lnet_rule_properties) lgfrl_list;
};
int lnet_fault_ctl(int cmd, struct libcfs_ioctl_data *data);
int lnet_drop_rule_add(struct lnet_fault_large_attr *attr);
int lnet_drop_rule_del(struct lnet_nid *fa_src, struct lnet_nid *fa_dst);
int lnet_fault_init(void);
void lnet_fault_fini(void);
bool lnet_drop_rule_match(struct lnet_hdr *hdr, struct lnet_nid *local_nid,
enum lnet_msg_hstatus *hstatus);
int lnet_drop_rule_collect(struct lnet_genl_fault_rule_list *rlist);
void lnet_drop_rule_reset(void);
int lnet_delay_rule_add(struct lnet_fault_large_attr *attr);
int lnet_delay_rule_del(struct lnet_nid *src, struct lnet_nid *dst,
bool shutdown);
int lnet_delay_rule_list(int pos, struct lnet_fault_large_attr *attr,
struct lnet_fault_stat *stat);
int lnet_delay_rule_collect(struct lnet_genl_fault_rule_list *rlist);
void lnet_delay_rule_reset(void);
void lnet_delay_rule_check(void);
bool lnet_delay_rule_match_locked(struct lnet_hdr *hdr, struct lnet_msg *msg);
/** @} lnet_fault_simulation */
void lnet_counters_get_common(struct lnet_counters_common *common);
int lnet_counters_get(struct lnet_counters *counters);
void lnet_counters_reset(void);
static inline void
lnet_ni_set_sel_priority_locked(struct lnet_ni *ni, __u32 priority)
{
ni->ni_sel_priority = priority;
}
static inline void
lnet_net_set_sel_priority_locked(struct lnet_net *net, __u32 priority)
{
net->net_sel_priority = priority;
}
unsigned int lnet_iov_nob(unsigned int niov, struct kvec *iov);
unsigned int lnet_kiov_nob(unsigned int niov, struct bio_vec *iov);
int lnet_extract_kiov(int dst_niov, struct bio_vec *dst,
int src_niov, const struct bio_vec *src,
unsigned int offset, unsigned int len);
void lnet_copy_kiov2iter(struct iov_iter *to,
unsigned int nkiov, const struct bio_vec *kiov,
unsigned int kiovoffset, unsigned int nob);
void lnet_me_unlink(struct lnet_me *me);
void lnet_md_unlink(struct lnet_libmd *md);
void lnet_md_deconstruct(struct lnet_libmd *lmd, struct lnet_event *ev);
struct page *lnet_get_first_page(struct lnet_libmd *md, unsigned int offset);
int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset);
unsigned int lnet_get_lnd_timeout(void);
void lnet_register_lnd(const struct lnet_lnd *lnd);
void lnet_unregister_lnd(const struct lnet_lnd *lnd);
struct socket *lnet_connect(struct lnet_nid *peer_nid, int interface,
struct sockaddr *peeraddr, struct net *ns,
bool control);
void lnet_connect_console_error(int rc, struct lnet_nid *peer_nid,
struct sockaddr *sa);
int lnet_count_acceptor_nets(void);
int lnet_acceptor_timeout(void);
int lnet_acceptor_port(void);
int lnet_acceptor_port_bulk(void);
int lnet_acceptor_start(void);
void lnet_acceptor_stop(void);
int lnet_acceptor_add_sockets(const char *iface, struct sockaddr *addr,
int ifindex, struct net *ni_net_ns);
void lnet_acceptor_remove_sockets(const char *iface);
struct lnet_inetdev {
u32 li_cpt;
union {
struct {
u32 li_ipaddr;
u32 li_netmask;
};
u32 li_ipv6addr[4];
};
u32 li_index;
bool li_iff_master;
u32 li_size;
char li_name[IFNAMSIZ];
};
int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns,
bool v6);
int lnet_inet_select(struct lnet_ni *ni, struct lnet_inetdev *ifaces,
int num_ifaces);
void lnet_sock_setbuf(struct socket *socket, int txbufsize, int rxbufsize);
void lnet_sock_getbuf(struct socket *socket, int *txbufsize, int *rxbufsize);
int lnet_sock_getaddr(struct socket *socket, bool remote,
struct sockaddr_storage *peer);
int lnet_sock_write(struct socket *sock, void *buffer, int nob, int timeout);
int lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout);
struct socket *lnet_sock_listen(int port, int backlog, struct net *ns,
struct sockaddr *addr, int ifindex);
struct socket *lnet_sock_connect(int interface, int local_port,
struct sockaddr_unsized *peeraddr,
struct net *ns);
int lnet_peers_start_down(void);
int lnet_peer_buffer_credits(struct lnet_net *net);
void lnet_consolidate_routes_locked(struct lnet_peer *orig_lp,
struct lnet_peer *new_lp);
void lnet_router_discovery_complete(struct lnet_peer *lp);
void lnet_router_discovery_ping_reply(struct lnet_peer *lp,
struct lnet_ping_buffer *pbuf);
int lnet_monitor_thr_start(void);
void lnet_monitor_thr_stop(void);
bool lnet_router_checker_active(void);
void lnet_check_routers(void);
void lnet_wait_router_start(void);
void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf);
int lnet_ping_info_validate(struct lnet_ping_info *pinfo);
struct lnet_ping_buffer *lnet_ping_buffer_alloc(int bytes, gfp_t gfp);
void lnet_ping_buffer_free(struct kref *kref);
int lnet_get_link_status(struct net_device *dev);
int lnet_get_link_status_locked(struct net_device *dev);
__u32 lnet_set_link_fatal_state(struct lnet_ni *ni, unsigned int link_state);
struct lnet_ping_iter {
struct lnet_ping_info *pinfo;
void *pos, *end;
};
u32 *ping_iter_first(struct lnet_ping_iter *pi, struct lnet_ping_buffer *pbuf,
struct lnet_nid *nid);
u32 *ping_iter_next(struct lnet_ping_iter *pi, struct lnet_nid *nid);
int ping_info_count_entries(struct lnet_ping_buffer *pbuf);
static inline int lnet_push_target_resize_needed(void)
{
return the_lnet.ln_push_target->pb_nbytes < the_lnet.ln_push_target_nbytes;
}
int lnet_push_target_resize(void);
int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
struct lnet_handle_md *mdh);
void lnet_peer_push_event(struct lnet_event *ev);
int lnet_parse_ip2nets(const char **networksp, const char *ip2nets);
int lnet_parse_routes(const char *route_str, int *im_a_router);
int lnet_parse_networks(struct list_head *nilist, const char *networks);
bool lnet_net_unique(__u32 net_id, struct list_head *nilist,
struct lnet_net **net);
bool lnet_ni_unique_net(struct list_head *nilist, char *iface);
void lnet_incr_dlc_seq(void);
__u32 lnet_get_dlc_seq_locked(void);
struct lnet_peer_net *lnet_get_next_peer_net_locked(struct lnet_peer *lp,
__u32 prev_lpn_id);
struct lnet_peer_ni *lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
struct lnet_peer_net *peer_net,
struct lnet_peer_ni *prev);
struct lnet_peer_ni *lnet_peerni_by_nid_locked(struct lnet_nid *nid,
struct lnet_nid *pref,
int cpt);
struct lnet_peer_ni *lnet_nid2peerni_ex(struct lnet_nid *nid);
struct lnet_peer_ni *lnet_peer_ni_get_locked(struct lnet_peer *lp,
struct lnet_nid *nid);
struct lnet_peer_ni *lnet_peer_ni_find_locked(struct lnet_nid *nid);
struct lnet_peer *lnet_find_peer(struct lnet_nid *nid);
void lnet_peer_net_added(struct lnet_net *net);
void lnet_peer_primary_nid_locked(struct lnet_nid *nid,
struct lnet_nid *result);
int lnet_discover_peer_locked(struct lnet_peer_ni *lpni, int cpt, bool block);
void lnet_peer_queue_message(struct lnet_peer *lp, struct lnet_msg *msg);
int lnet_peer_discovery_start(void);
void lnet_peer_discovery_stop(void);
void lnet_push_update_to_peers(int force);
void lnet_peer_tables_cleanup(struct lnet_net *net);
void lnet_peer_uninit(void);
int lnet_peer_tables_create(void);
void lnet_debug_peer(struct lnet_nid *nid);
struct lnet_peer_net *lnet_peer_get_net_locked(struct lnet_peer *peer,
__u32 net_id);
bool lnet_peer_is_pref_nid_locked(struct lnet_peer_ni *lpni,
struct lnet_nid *nid);
int lnet_peer_add_pref_nid(struct lnet_peer_ni *lpni, struct lnet_nid *nid);
void lnet_peer_clr_pref_nids(struct lnet_peer_ni *lpni);
bool lnet_peer_is_pref_rtr_locked(struct lnet_peer_ni *lpni,
struct lnet_nid *gw_nid);
void lnet_peer_clr_pref_rtrs(struct lnet_peer_ni *lpni);
int lnet_peer_add_pref_rtr(struct lnet_peer_ni *lpni, struct lnet_nid *nid);
int lnet_peer_ni_set_non_mr_pref_nid(struct lnet_peer_ni *lpni,
struct lnet_nid *nid);
int lnet_user_add_peer_ni(struct lnet_nid *key_nid, struct lnet_nid *nid,
bool mr, bool lock_prim);
int lnet_del_peer_ni(struct lnet_nid *key_nid, struct lnet_nid *nid,
int force);
int lnet_get_peer_info(struct lnet_ioctl_peer_cfg *cfg, void __user *bulk);
int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
char alivness[LNET_MAX_STR_LEN],
__u32 *cpt_iter, __u32 *refcount,
__u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
__u32 *peer_rtr_credits, __u32 *peer_min_rtr_credtis,
__u32 *peer_tx_qnob);
int lnet_get_peer_ni_hstats(struct lnet_ioctl_peer_ni_hstats *stats);
static inline void
lnet_peer_net_set_sel_priority_locked(struct lnet_peer_net *lpn, __u32 priority)
{
lpn->lpn_sel_priority = priority;
}
static inline bool
lnet_peer_is_multi_rail(struct lnet_peer *lp)
{
if (lp->lp_state & LNET_PEER_MULTI_RAIL)
return true;
return false;
}
static inline bool
lnet_peer_ni_is_configured(struct lnet_peer_ni *lpni)
{
if (lpni->lpni_peer_net->lpn_peer->lp_state & LNET_PEER_CONFIGURED)
return true;
return false;
}
static inline bool
lnet_peer_ni_is_primary(struct lnet_peer_ni *lpni)
{
return nid_same(&lpni->lpni_nid,
&lpni->lpni_peer_net->lpn_peer->lp_primary_nid);
}
bool lnet_peer_is_uptodate(struct lnet_peer *lp);
bool lnet_peer_is_uptodate_locked(struct lnet_peer *lp);
bool lnet_is_discovery_disabled(struct lnet_peer *lp);
bool lnet_is_discovery_disabled_locked(struct lnet_peer *lp);
bool lnet_peer_gw_discovery(struct lnet_peer *lp);
static inline bool
lnet_peer_needs_push(struct lnet_peer *lp)
{
if (!(lp->lp_state & LNET_PEER_MULTI_RAIL))
return false;
if (lp->lp_state & LNET_PEER_MARK_DELETED)
return false;
if (lp->lp_state & LNET_PEER_PUSH_SENT)
return false;
if (lp->lp_state & LNET_PEER_FORCE_PUSH)
return true;
if (lp->lp_state & LNET_PEER_NO_DISCOVERY)
return false;
/* if discovery is not enabled then no need to push */
if (lnet_peer_discovery_disabled)
return false;
if (lp->lp_node_seqno < atomic_read(&the_lnet.ln_ping_target_seqno))
return true;
return false;
}
static inline bool
lnet_peer_needs_ping(struct lnet_peer *lp)
{
if (lp->lp_state & LNET_PEER_FORCE_PING)
return true;
else if (!(lp->lp_state & LNET_PEER_NIDS_UPTODATE))
return true;
return false;
}
static inline unsigned int
lnet_get_next_recovery_ping(unsigned int ping_count, time64_t now)
{
unsigned int interval;
/* lnet_max_recovery_interval <= 2^lnet_max_recovery_ping_count */
if (ping_count > lnet_max_recovery_ping_count)
interval = lnet_max_recovery_ping_interval;
else
interval = 1 << ping_count;
return now + interval;
}
static inline void
lnet_peer_ni_set_next_ping(struct lnet_peer_ni *lpni, time64_t now)
{
lpni->lpni_next_ping =
lnet_get_next_recovery_ping(lpni->lpni_ping_count, now);
}
static inline void
lnet_ni_set_next_ping(struct lnet_ni *ni, time64_t now)
{
ni->ni_next_ping = lnet_get_next_recovery_ping(ni->ni_ping_count, now);
}
/* We consider a peer NI to be alive if its cached NI status is UP
*/
static inline bool
lnet_is_peer_ni_alive(struct lnet_peer_ni *lpni)
{
return lpni->lpni_ns_status == LNET_NI_STATUS_UP;
}
static inline void
lnet_update_peer_net_healthv(struct lnet_peer_ni *lpni)
{
struct lnet_peer_net *lpn;
int best_healthv = 0;
lpn = lpni->lpni_peer_net;
list_for_each_entry(lpni, &lpn->lpn_peer_nis, lpni_peer_nis) {
int lpni_healthv = atomic_read(&lpni->lpni_healthv);
if (best_healthv < lpni_healthv)
best_healthv = lpni_healthv;
}
lpn->lpn_healthv = best_healthv;
}
static inline void
lnet_set_lpni_healthv_locked(struct lnet_peer_ni *lpni, int value)
{
if (atomic_read(&lpni->lpni_healthv) == value)
return;
atomic_set(&lpni->lpni_healthv, value);
lnet_update_peer_net_healthv(lpni);
}
static inline bool
lnet_atomic_add_unless_max(atomic_t *v, int a, int u)
{
int c = atomic_read(v);
bool mod = false;
int old;
int m;
if (c == u)
return mod;
for (;;) {
if (c + a >= u)
m = u;
else
m = c + a;
old = atomic_cmpxchg(v, c, m);
if (old == u)
break;
if (old == c) {
mod = true;
break;
}
c = old;
}
return mod;
}
static bool
lnet_dec_healthv_locked(atomic_t *healthv)
{
int h = atomic_read(healthv);
if (h == 0)
return false;
if (h < lnet_health_sensitivity)
h = 0;
else
h -= lnet_health_sensitivity;
return (atomic_xchg(healthv, h) != h);
}
static inline void
lnet_dec_ni_healthv_locked(struct lnet_ni *ni)
{
/* Decrement health and if health value transitioned to 0 then update
* status to DOWN
*/
if (lnet_dec_healthv_locked(&ni->ni_healthv) &&
atomic_read(&ni->ni_healthv) == 0)
lnet_ni_set_status(ni, LNET_NI_STATUS_DOWN);
}
static inline void
lnet_dec_lpni_healthv_locked(struct lnet_peer_ni *lpni)
{
/* only adjust the net health if the lpni health value changed */
if (lnet_dec_healthv_locked(&lpni->lpni_healthv))
lnet_update_peer_net_healthv(lpni);
}
static inline bool
lnet_inc_healthv(atomic_t *healthv)
{
return lnet_atomic_add_unless_max(healthv, lnet_health_sensitivity,
LNET_MAX_HEALTH_VALUE);
}
static inline void
lnet_inc_ni_healthv(struct lnet_ni *ni)
{
/* Increment health and if health value transitioned to maximum then
* update status to UP
*/
if (lnet_inc_healthv(&ni->ni_healthv) &&
atomic_read(&ni->ni_healthv) == LNET_MAX_HEALTH_VALUE)
lnet_ni_set_status(ni, LNET_NI_STATUS_UP);
}
static inline void
lnet_inc_lpni_healthv_locked(struct lnet_peer_ni *lpni)
{
/* only adjust the net health if the lpni health value changed */
if (lnet_inc_healthv(&lpni->lpni_healthv))
lnet_update_peer_net_healthv(lpni);
}
static inline int
lnet_get_list_len(struct list_head *list)
{
struct list_head *l;
int count = 0;
list_for_each(l, list)
count++;
return count;
}
void lnet_incr_stats(struct lnet_element_stats *stats,
enum lnet_msg_type msg_type,
enum lnet_stats_type stats_type);
__u32 lnet_sum_stats(struct lnet_element_stats *stats,
enum lnet_stats_type stats_type);
void lnet_usr_translate_stats(struct lnet_ioctl_element_msg_stats *msg_stats,
struct lnet_element_stats *stats);
static inline void
lnet_set_route_aliveness(struct lnet_route *route, bool alive)
{
bool old = atomic_xchg(&route->lr_alive, alive);
if (old != alive)
CERROR("route to %s through %s has gone from %s to %s\n",
libcfs_net2str(route->lr_net),
libcfs_nidstr(&route->lr_gateway->lp_primary_nid),
old ? "up" : "down",
alive ? "up" : "down");
}
extern struct blocking_notifier_head lnet_ioctl_list;
static inline int notifier_from_ioctl_errno(int err)
{
if (err == -EINVAL)
return NOTIFY_OK;
return notifier_from_errno(err) | NOTIFY_STOP_MASK;
}
void lnet_mark_ping_buffer_for_update(void);
void lnet_queue_ping_buffer_update(void);
#endif
