Viewing: ldlm_lib.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) 2010, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
/*
* This file deals with various client/target related logic including recovery.
*
* TODO: This code more logically belongs in the ptlrpc module than in ldlm and
* should be moved.
*/
#define DEBUG_SUBSYSTEM S_LDLM
#include <cl_object.h>
#include <linux/fs_struct.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <obd.h>
#include <obd_class.h>
#include <lustre_dlm.h>
#include <lustre_net.h>
#include <lustre_sec.h>
#include <uapi/linux/lustre/lustre_ioctl.h>
#include "ldlm_internal.h"
/*
* @priority: If non-zero, move the selected connection to the list head.
* @create: If zero, only search in existing connections.
*/
static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
int priority, int create)
{
struct ptlrpc_connection *ptlrpc_conn;
struct obd_import_conn *imp_conn = NULL, *item;
u32 refnet = imp->imp_conn_restricted_net;
int rc = 0;
ENTRY;
if (!create && !priority) {
CDEBUG(D_HA, "Nothing to do\n");
RETURN(-EINVAL);
}
/* refnet is used to restrict network connections */
if (refnet != LNET_NET_ANY)
CDEBUG(D_HA, "imp %s: restrict %s to %s net\n",
imp->imp_obd->obd_name, uuid->uuid,
libcfs_net2str(refnet));
ptlrpc_conn = ptlrpc_uuid_to_connection(uuid, refnet);
if (IS_ERR(ptlrpc_conn)) {
CDEBUG(D_HA, "can't find connection %s: rc=%ld\n",
uuid->uuid, PTR_ERR(ptlrpc_conn));
RETURN(PTR_ERR(ptlrpc_conn));
}
if (create) {
OBD_ALLOC(imp_conn, sizeof(*imp_conn));
if (!imp_conn)
GOTO(out_put, rc = -ENOMEM);
}
spin_lock(&imp->imp_lock);
list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
if (obd_uuid_equals(uuid, &item->oic_uuid)) {
if (priority) {
list_move(&item->oic_item,
&imp->imp_conn_list);
item->oic_last_attempt = 0;
}
CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
imp, imp->imp_obd->obd_name, uuid->uuid,
(priority ? ", moved to head" : ""));
spin_unlock(&imp->imp_lock);
GOTO(out_free, rc = 0);
}
}
/* No existing import connection found for \a uuid. */
if (create) {
imp_conn->oic_conn = ptlrpc_conn;
imp_conn->oic_uuid = *uuid;
imp_conn->oic_last_attempt = 0;
if (priority)
list_add(&imp_conn->oic_item, &imp->imp_conn_list);
else
list_add_tail(&imp_conn->oic_item,
&imp->imp_conn_list);
CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
imp, imp->imp_obd->obd_name, uuid->uuid,
(priority ? "head" : "tail"));
} else {
spin_unlock(&imp->imp_lock);
GOTO(out_free, rc = -ENOENT);
}
spin_unlock(&imp->imp_lock);
RETURN(0);
out_free:
OBD_FREE(imp_conn, sizeof(*imp_conn));
out_put:
ptlrpc_connection_put(ptlrpc_conn);
RETURN(rc);
}
int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
{
return import_set_conn(imp, uuid, 1, 0);
}
int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
int priority)
{
return import_set_conn(imp, uuid, priority, 1);
}
EXPORT_SYMBOL(client_import_add_conn);
int client_import_dyn_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
struct lnet_nid *prim_nid, int priority)
{
struct ptlrpc_connection *ptlrpc_conn;
int rc;
ptlrpc_conn = ptlrpc_uuid_to_connection(uuid, LNET_NID_NET(prim_nid));
if (IS_ERR(ptlrpc_conn)) {
const char *str_uuid = obd_uuid2str(uuid);
rc = class_add_uuid(str_uuid, prim_nid);
if (rc) {
CERROR("%s: failed to add UUID '%s': rc = %d\n",
imp->imp_obd->obd_name, str_uuid, rc);
return rc;
}
} else {
ptlrpc_connection_put(ptlrpc_conn);
}
return import_set_conn(imp, uuid, priority, 1);
}
EXPORT_SYMBOL(client_import_dyn_add_conn);
int client_import_add_nids_to_conn(struct obd_import *imp,
struct lnet_nid *nidlist,
int nid_count, struct obd_uuid *uuid)
{
struct obd_import_conn *conn;
int rc = -ENOENT;
ENTRY;
if (nid_count <= 0 || !nidlist)
return rc;
spin_lock(&imp->imp_lock);
list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
int i;
for (i = 0; i < nid_count; i++) {
if (!class_check_uuid(&conn->oic_uuid, &nidlist[i]))
continue;
*uuid = conn->oic_uuid;
spin_unlock(&imp->imp_lock);
rc = class_add_nids_to_uuid(&conn->oic_uuid, nidlist,
nid_count);
RETURN(rc);
}
}
spin_unlock(&imp->imp_lock);
RETURN(rc);
}
EXPORT_SYMBOL(client_import_add_nids_to_conn);
int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
{
struct obd_import_conn *imp_conn;
struct obd_export *dlmexp;
int rc = -ENOENT;
ENTRY;
spin_lock(&imp->imp_lock);
if (list_empty(&imp->imp_conn_list)) {
LASSERT(!imp->imp_connection);
GOTO(out, rc);
}
list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
continue;
LASSERT(imp_conn->oic_conn);
if (imp_conn == imp->imp_conn_current) {
LASSERT(imp_conn->oic_conn == imp->imp_connection);
if (imp->imp_state != LUSTRE_IMP_CLOSED &&
imp->imp_state != LUSTRE_IMP_DISCON) {
CERROR("can't remove current connection\n");
GOTO(out, rc = -EBUSY);
}
ptlrpc_connection_put(imp->imp_connection);
imp->imp_connection = NULL;
dlmexp = class_conn2export(&imp->imp_dlm_handle);
if (dlmexp && dlmexp->exp_connection) {
LASSERT(dlmexp->exp_connection ==
imp_conn->oic_conn);
ptlrpc_connection_put(dlmexp->exp_connection);
dlmexp->exp_connection = NULL;
}
if (dlmexp != NULL)
class_export_put(dlmexp);
}
list_del(&imp_conn->oic_item);
ptlrpc_connection_put(imp_conn->oic_conn);
OBD_FREE(imp_conn, sizeof(*imp_conn));
CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
imp, imp->imp_obd->obd_name, uuid->uuid);
rc = 0;
break;
}
out:
spin_unlock(&imp->imp_lock);
if (rc == -ENOENT)
CERROR("connection %s not found\n", uuid->uuid);
RETURN(rc);
}
EXPORT_SYMBOL(client_import_del_conn);
void client_destroy_import(struct obd_import *imp)
{
/*
* Drop security policy instance after all RPCs have finished/aborted
* to let all busy contexts be released.
*/
class_import_get(imp);
class_destroy_import(imp);
sptlrpc_import_sec_put(imp);
class_import_put(imp);
}
EXPORT_SYMBOL(client_destroy_import);
/**
* Check whether or not the OSC is on MDT.
* In the config log,
* osc on MDT
* setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
* osc on client
* setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
*
**/
static int osc_on_mdt(char *obdname)
{
char *ptr;
ptr = strrchr(obdname, '-');
if (ptr == NULL)
return 0;
if (strncmp(ptr + 1, "MDT", 3) == 0)
return 1;
return 0;
}
/*
* Configure an RPC client OBD device.
*
* lcfg parameters:
* 1 - client UUID
* 2 - server UUID
* 3 - inactive-on-startup
* 4 - restrictive net
*/
int client_obd_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
{
struct client_obd *cli = &obd->u.cli;
struct obd_import *imp;
struct obd_uuid server_uuid;
int rq_portal, rp_portal, connect_op;
const char *name = obd->obd_type->typ_name;
enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
char *cli_name = lustre_cfg_buf(lcfg, 0);
int rc;
ENTRY;
/*
* In a more perfect world, we would hang a ptlrpc_client off of
* obd_type and just use the values from there.
*/
if (!strcmp(name, LUSTRE_OSC_NAME)) {
rq_portal = OST_REQUEST_PORTAL;
rp_portal = OSC_REPLY_PORTAL;
connect_op = OST_CONNECT;
cli->cl_sp_me = LUSTRE_SP_CLI;
cli->cl_sp_to = LUSTRE_SP_OST;
ns_type = LDLM_NS_TYPE_OSC;
} else if (!strcmp(name, LUSTRE_MDC_NAME) ||
!strcmp(name, LUSTRE_LWP_NAME)) {
rq_portal = MDS_REQUEST_PORTAL;
rp_portal = MDC_REPLY_PORTAL;
connect_op = MDS_CONNECT;
if (is_lwp_on_ost(cli_name))
cli->cl_sp_me = LUSTRE_SP_OST;
else if (is_lwp_on_mdt(cli_name))
cli->cl_sp_me = LUSTRE_SP_MDT;
else
cli->cl_sp_me = LUSTRE_SP_CLI;
cli->cl_sp_to = LUSTRE_SP_MDT;
ns_type = LDLM_NS_TYPE_MDC;
} else if (!strcmp(name, LUSTRE_OSP_NAME)) {
if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
/* OSP_on_MDT for other MDTs */
connect_op = MDS_CONNECT;
cli->cl_sp_to = LUSTRE_SP_MDT;
ns_type = LDLM_NS_TYPE_MDC;
rq_portal = OUT_PORTAL;
} else {
/* OSP on MDT for OST */
connect_op = OST_CONNECT;
cli->cl_sp_to = LUSTRE_SP_OST;
ns_type = LDLM_NS_TYPE_OSC;
rq_portal = OST_REQUEST_PORTAL;
}
rp_portal = OSC_REPLY_PORTAL;
cli->cl_sp_me = LUSTRE_SP_MDT;
} else if (!strcmp(name, LUSTRE_MGC_NAME)) {
rq_portal = MGS_REQUEST_PORTAL;
rp_portal = MGC_REPLY_PORTAL;
connect_op = MGS_CONNECT;
cli->cl_sp_me = LUSTRE_SP_MGC;
cli->cl_sp_to = LUSTRE_SP_MGS;
cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
ns_type = LDLM_NS_TYPE_MGC;
} else {
CERROR("unknown client OBD type \"%s\", can't setup\n",
name);
RETURN(-EINVAL);
}
if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
CERROR("requires a TARGET UUID\n");
RETURN(-EINVAL);
}
if (LUSTRE_CFG_BUFLEN(lcfg, 1) > UUID_MAX) {
CERROR("client UUID must be %u characters or less\n", UUID_MAX);
RETURN(-EINVAL);
}
if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
CERROR("setup requires a SERVER UUID\n");
RETURN(-EINVAL);
}
if (LUSTRE_CFG_BUFLEN(lcfg, 2) > UUID_MAX) {
CERROR("target UUID must be %u characters or less\n", UUID_MAX);
RETURN(-EINVAL);
}
init_rwsem(&cli->cl_sem);
mutex_init(&cli->cl_mgc_mutex);
cli->cl_seq = NULL;
init_rwsem(&cli->cl_seq_rwsem);
cli->cl_conn_count = 0;
memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
sizeof(server_uuid)));
cli->cl_dirty_pages = 0;
cli->cl_dirty_max_pages = 0;
cli->cl_avail_grant = 0;
/* FIXME: Should limit this for the sum of all cl_dirty_max_pages. */
/*
* cl_dirty_max_pages may be changed at connect time in
* ptlrpc_connect_interpret().
*/
client_adjust_max_dirty(cli);
init_waitqueue_head(&cli->cl_cache_waiters);
INIT_LIST_HEAD(&cli->cl_loi_ready_list);
INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
INIT_LIST_HEAD(&cli->cl_loi_write_list);
INIT_LIST_HEAD(&cli->cl_loi_read_list);
spin_lock_init(&cli->cl_loi_list_lock);
atomic_set(&cli->cl_pending_w_pages, 0);
atomic_set(&cli->cl_pending_r_pages, 0);
cli->cl_r_in_flight = 0;
cli->cl_w_in_flight = 0;
cli->cl_d_in_flight = 0;
cli->cl_stats_init = ktime_get_real();
spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
spin_lock_init(&cli->cl_read_page_hist.oh_lock);
spin_lock_init(&cli->cl_write_page_hist.oh_lock);
spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
spin_lock_init(&cli->cl_read_io_latency_hist.oh_lock);
spin_lock_init(&cli->cl_write_io_latency_hist.oh_lock);
spin_lock_init(&cli->cl_batch_rpc_hist.oh_lock);
/* Initialize RPC latency by size histograms */
{
int num_buckets = PTLRPC_MAX_BRW_BITS - PAGE_SHIFT;
int i;
OBD_ALLOC_PTR_ARRAY(cli->cl_read_io_latency_by_size,
num_buckets);
cli->cl_io_latency_stats_init = ktime_get_real();
if (cli->cl_read_io_latency_by_size) {
for (i = 0; i < num_buckets; i++) {
struct obd_histogram *h;
h = &cli->cl_read_io_latency_by_size[i];
spin_lock_init(&h->oh_lock);
lprocfs_oh_clear(h);
}
}
OBD_ALLOC_PTR_ARRAY(cli->cl_write_io_latency_by_size,
num_buckets);
if (cli->cl_write_io_latency_by_size) {
for (i = 0; i < num_buckets; i++) {
struct obd_histogram *h;
h = &cli->cl_write_io_latency_by_size[i];
spin_lock_init(&h->oh_lock);
lprocfs_oh_clear(h);
}
}
}
/* lru for osc. */
INIT_LIST_HEAD(&cli->cl_lru_osc);
atomic_set(&cli->cl_lru_shrinkers, 0);
atomic_long_set(&cli->cl_lru_busy, 0);
atomic_long_set(&cli->cl_lru_in_list, 0);
atomic_long_set(&cli->cl_unevict_lru_in_list, 0);
INIT_LIST_HEAD(&cli->cl_lru_list);
INIT_LIST_HEAD(&cli->cl_unevict_lru_list);
spin_lock_init(&cli->cl_lru_list_lock);
atomic_long_set(&cli->cl_unstable_count, 0);
INIT_LIST_HEAD(&cli->cl_shrink_list);
INIT_LIST_HEAD(&cli->cl_grant_chain);
INIT_LIST_HEAD(&cli->cl_flight_waiters);
cli->cl_rpcs_in_flight = 0;
init_waitqueue_head(&cli->cl_destroy_waitq);
atomic_set(&cli->cl_destroy_in_flight, 0);
cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
cli->cl_preferred_cksum_type = 0;
#ifdef CONFIG_ENABLE_CHECKSUM
/* Turn on checksumming by default. */
cli->cl_checksum = 1;
/*
* The supported checksum types will be worked out at connect time
* Set cl_chksum* to CRC32 for now to avoid returning screwed info
* through procfs.
*/
cli->cl_cksum_type = cli->cl_supp_cksum_types;
#endif
atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
/*
* Set it to possible maximum size. It may be reduced by ocd_brw_size
* from OFD after connecting.
*/
cli->cl_max_pages_per_rpc_read = PTLRPC_MAX_BRW_PAGES;
cli->cl_max_pages_per_rpc_write = PTLRPC_MAX_BRW_PAGES;
cli->cl_max_short_io_bytes = OBD_DEF_SHORT_IO_BYTES;
/*
* set cl_chunkbits default value to PAGE_SHIFT,
* it will be updated at OSC connection time.
*/
cli->cl_chunkbits = PAGE_SHIFT;
if (!strcmp(name, LUSTRE_MDC_NAME)) {
cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
} else if (compat_totalram_pages() >> (20 - PAGE_SHIFT) <= 128 /* MB */) {
cli->cl_max_rpcs_in_flight = 2;
} else if (compat_totalram_pages() >> (20 - PAGE_SHIFT) <= 256 /* MB */) {
cli->cl_max_rpcs_in_flight = 3;
} else if (compat_totalram_pages() >> (20 - PAGE_SHIFT) <= 512 /* MB */) {
cli->cl_max_rpcs_in_flight = 4;
} else {
if (osc_on_mdt(obd->obd_name))
cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_MAX;
else
cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
}
spin_lock_init(&cli->cl_mod_rpcs_hist.oh_lock);
cli->cl_max_mod_rpcs_in_flight = 0;
cli->cl_mod_rpcs_in_flight = 0;
cli->cl_close_rpcs_in_flight = 0;
init_waitqueue_head(&cli->cl_mod_rpcs_waitq);
cli->cl_mod_rpcs_init = ktime_get_real();
cli->cl_mod_tag_bitmap = NULL;
INIT_LIST_HEAD(&cli->cl_chg_dev_linkage);
if (connect_op == MDS_CONNECT) {
cli->cl_max_mod_rpcs_in_flight = cli->cl_max_rpcs_in_flight - 1;
OBD_ALLOC(cli->cl_mod_tag_bitmap,
BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
if (cli->cl_mod_tag_bitmap == NULL)
GOTO(err_latency, rc = -ENOMEM);
}
rc = ldlm_get_ref();
if (rc) {
CERROR("ldlm_get_ref failed: %d\n", rc);
GOTO(err, rc);
}
ptlrpc_init_client(rq_portal, rp_portal, name,
&obd->obd_ldlm_client);
imp = class_new_import(obd);
if (imp == NULL)
GOTO(err_ldlm, rc = -ENOENT);
imp->imp_client = &obd->obd_ldlm_client;
imp->imp_connect_op = connect_op;
memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
LUSTRE_CFG_BUFLEN(lcfg, 1));
class_import_put(imp);
if (lustre_cfg_buf(lcfg, 4)) {
__u32 refnet = libcfs_str2net(lustre_cfg_string(lcfg, 4));
if (refnet == LNET_NET_ANY) {
rc = -EINVAL;
CERROR("%s: bad mount option 'network=%s': rc = %d\n",
obd->obd_name, lustre_cfg_string(lcfg, 4),
rc);
GOTO(err_import, rc);
}
imp->imp_conn_restricted_net = refnet;
} else {
imp->imp_conn_restricted_net = LNET_NET_ANY;
}
rc = client_import_add_conn(imp, &server_uuid, 1);
if (rc == -ENOENT) {
CWARN("%s: config has no valid NIDs, force dynamic NIDs\n",
obd->obd_name);
rc = 0;
/* set dynamic nids parameter in client OBD, so MGC will
* detects that while process IR log for that OBD
*/
spin_lock(&obd->obd_dev_lock);
obd->obd_dynamic_nids = 1;
spin_unlock(&obd->obd_dev_lock);
}
if (rc) {
CERROR("can't add initial connection\n");
GOTO(err_import, rc);
}
imp->imp_connection = NULL;
cli->cl_import = imp;
/* cli->cl_max_mds_easize updated by mdc_init_ea_size() */
cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
name, obd->obd_name,
cli->cl_target_uuid.uuid);
set_bit(IMPF_DEACTIVE, imp->imp_flags);
}
}
obd->obd_namespace = ldlm_namespace_new(obd, obd->obd_name,
LDLM_NAMESPACE_CLIENT,
LDLM_NAMESPACE_GREEDY,
ns_type);
if (IS_ERR(obd->obd_namespace)) {
rc = PTR_ERR(obd->obd_namespace);
CERROR("%s: unable to create client namespace: rc = %d\n",
obd->obd_name, rc);
obd->obd_namespace = NULL;
GOTO(err_import, rc);
}
RETURN(rc);
err_import:
class_destroy_import(imp);
err_ldlm:
ldlm_put_ref();
err:
OBD_FREE(cli->cl_mod_tag_bitmap,
BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
cli->cl_mod_tag_bitmap = NULL;
err_latency:
OBD_FREE_PTR_ARRAY(cli->cl_read_io_latency_by_size,
PTLRPC_MAX_BRW_BITS - PAGE_SHIFT);
cli->cl_read_io_latency_by_size = NULL;
OBD_FREE_PTR_ARRAY(cli->cl_write_io_latency_by_size,
PTLRPC_MAX_BRW_BITS - PAGE_SHIFT);
cli->cl_write_io_latency_by_size = NULL;
RETURN(rc);
}
EXPORT_SYMBOL(client_obd_setup);
void client_obd_cleanup(struct obd_device *obd)
{
struct client_obd *cli = &obd->u.cli;
ENTRY;
ldlm_namespace_free_post(obd->obd_namespace);
obd->obd_namespace = NULL;
obd_cleanup_client_import(obd);
LASSERT(obd->u.cli.cl_import == NULL);
ldlm_put_ref();
OBD_FREE(cli->cl_mod_tag_bitmap,
BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
cli->cl_mod_tag_bitmap = NULL;
/* Free RPC latency by size histograms */
OBD_FREE_PTR_ARRAY(cli->cl_read_io_latency_by_size,
PTLRPC_MAX_BRW_BITS - PAGE_SHIFT);
cli->cl_read_io_latency_by_size = NULL;
OBD_FREE_PTR_ARRAY(cli->cl_write_io_latency_by_size,
PTLRPC_MAX_BRW_BITS - PAGE_SHIFT);
cli->cl_write_io_latency_by_size = NULL;
EXIT;
}
EXPORT_SYMBOL(client_obd_cleanup);
/* ->o_connect() method for client side (OSC and MDC and MGC) */
int client_connect_import(const struct lu_env *env,
struct obd_export **exp,
struct obd_device *obd, struct obd_uuid *cluuid,
struct obd_connect_data *data, void *localdata)
{
struct client_obd *cli = &obd->u.cli;
struct obd_import *imp = cli->cl_import;
struct obd_connect_data *ocd;
struct lustre_handle conn = { 0 };
int rc;
ENTRY;
*exp = NULL;
down_write(&cli->cl_sem);
if (cli->cl_conn_count > 0)
GOTO(out_sem, rc = -EALREADY);
rc = class_connect(&conn, obd, cluuid);
if (rc)
GOTO(out_sem, rc);
cli->cl_conn_count++;
*exp = class_conn2export(&conn);
LASSERT(obd->obd_namespace);
spin_lock(&imp->imp_lock);
if (imp->imp_state == LUSTRE_IMP_CLOSED &&
test_bit(IMPF_DEACTIVE, imp->imp_flags)) {
/* need to reactivate import if trying to connect
* to a previously disconnected
*/
clear_bit(IMPF_DEACTIVE, imp->imp_flags);
clear_bit(IMPF_INVALID, imp->imp_flags);
smp_mb__after_atomic();
}
spin_unlock(&imp->imp_lock);
imp->imp_dlm_handle = conn;
rc = ptlrpc_init_import(imp);
if (rc != 0)
GOTO(out_ldlm, rc);
ocd = &imp->imp_connect_data;
if (data) {
*ocd = *data;
imp->imp_connect_flags_orig = data->ocd_connect_flags;
imp->imp_connect_flags2_orig = data->ocd_connect_flags2;
}
rc = ptlrpc_connect_import(imp);
if (rc != 0) {
LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
GOTO(out_ldlm, rc);
}
LASSERT(*exp != NULL && (*exp)->exp_connection);
if (data) {
LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
data->ocd_connect_flags, ocd->ocd_connect_flags);
data->ocd_connect_flags = ocd->ocd_connect_flags;
data->ocd_connect_flags2 = ocd->ocd_connect_flags2;
}
ptlrpc_pinger_add_import(imp);
EXIT;
if (rc) {
out_ldlm:
cli->cl_conn_count--;
class_disconnect(*exp);
*exp = NULL;
/*
* Connect failed before obd_disconnect() could be called, so
* client_disconnect_export() was never called and
* ldlm_namespace_free_prior() was skipped. Call it now so
* that LDLM_NS_STOPPING is set before
* ldlm_namespace_free_post() runs in client_obd_cleanup(),
* preventing a kobject leak and the pool recalc race on the
* namespace.
*/
if (obd->obd_namespace)
ldlm_namespace_free_prior(obd->obd_namespace, imp,
test_bit(OBDF_FORCE,
obd->obd_flags));
}
out_sem:
up_write(&cli->cl_sem);
if (!rc && localdata && !cli->cl_cache) {
cli->cl_cache = (struct cl_client_cache *)localdata;
cl_cache_incref(cli->cl_cache);
cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
/* add this osc into entity list */
LASSERT(list_empty(&cli->cl_lru_osc));
spin_lock(&cli->cl_cache->ccc_lru_lock);
list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
spin_unlock(&cli->cl_cache->ccc_lru_lock);
}
return rc;
}
EXPORT_SYMBOL(client_connect_import);
int client_disconnect_export(struct obd_export *exp)
{
struct obd_device *obd = class_exp2obd(exp);
struct client_obd *cli;
struct obd_import *imp;
int rc = 0, err;
ENTRY;
if (!obd) {
CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
exp, exp ? exp->exp_handle.h_cookie : -1);
RETURN(-EINVAL);
}
cli = &obd->u.cli;
imp = cli->cl_import;
down_write(&cli->cl_sem);
CDEBUG(D_INFO, "disconnect %s - %zu\n", obd->obd_name,
cli->cl_conn_count);
if (cli->cl_conn_count == 0) {
CERROR("disconnecting disconnected device (%s)\n",
obd->obd_name);
GOTO(out_disconnect, rc = -EINVAL);
}
cli->cl_conn_count--;
if (cli->cl_conn_count != 0)
GOTO(out_disconnect, rc = 0);
/*
* Mark import deactivated now, so we don't try to reconnect if any
* of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
* fully deactivate the import, or that would drop all requests.
*/
set_bit(IMPF_DEACTIVE, imp->imp_flags);
smp_mb__after_atomic();
/*
* Some non-replayable imports (MDS's OSCs) are pinged, so just
* delete it regardless. (It's safe to delete an import that was
* never added.)
*/
(void)ptlrpc_pinger_del_import(imp);
if (obd->obd_namespace != NULL) {
/* OBDF_FORCE == local only */
ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
test_bit(OBDF_FORCE, obd->obd_flags) ?
LCF_LOCAL : 0, NULL);
ldlm_namespace_free_prior(obd->obd_namespace, imp,
test_bit(OBDF_FORCE, obd->obd_flags));
}
/*
* There's no need to hold sem while disconnecting an import,
* and it may actually cause deadlock in GSS.
*/
up_write(&cli->cl_sem);
rc = ptlrpc_disconnect_import(imp, 0);
down_write(&cli->cl_sem);
ptlrpc_invalidate_import(imp);
EXIT;
out_disconnect:
/*
* Use server style - class_disconnect should be always called for
* o_disconnect.
*/
err = class_disconnect(exp);
if (!rc && err)
rc = err;
up_write(&cli->cl_sem);
RETURN(rc);
}
EXPORT_SYMBOL(client_disconnect_export);
#ifdef CONFIG_LUSTRE_FS_SERVER
int server_disconnect_export(struct obd_export *exp)
{
int rc;
ENTRY;
/* Disconnect early so that clients can't keep using export. */
rc = class_disconnect(exp);
/* Close import to avoid sending any requests. */
if (exp->exp_imp_reverse)
ptlrpc_cleanup_imp(exp->exp_imp_reverse);
ldlm_bl_thread_wakeup();
/* complete all outstanding replies */
spin_lock(&exp->exp_lock);
while (!list_empty(&exp->exp_outstanding_replies)) {
struct ptlrpc_reply_state *rs =
list_first_entry(&exp->exp_outstanding_replies,
struct ptlrpc_reply_state,
rs_exp_list);
struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
spin_lock(&svcpt->scp_rep_lock);
list_del_init(&rs->rs_exp_list);
spin_lock(&rs->rs_lock);
ptlrpc_schedule_difficult_reply(rs);
spin_unlock(&rs->rs_lock);
spin_unlock(&svcpt->scp_rep_lock);
}
spin_unlock(&exp->exp_lock);
RETURN(rc);
}
EXPORT_SYMBOL(server_disconnect_export);
static inline int target_check_recovery_timer(struct obd_device *target)
{
ktime_t remaining;
s64 timeout;
if (!test_bit(OBDF_RECOVERING, target->obd_flags) ||
target->obd_recovery_start == 0)
return 0;
remaining = hrtimer_get_remaining(&target->obd_recovery_timer);
timeout = ktime_divns(remaining, NSEC_PER_SEC);
if (timeout > -30)
return 0;
/* the recovery timer should expire, but it isn't triggered,
* it's better to abort the recovery of this target to speed up
* the recovery of the whole cluster.
*/
spin_lock(&target->obd_dev_lock);
if (test_bit(OBDF_RECOVERING, target->obd_flags)) {
CERROR("%s: Aborting recovery\n", target->obd_name);
set_bit(OBDF_ABORT_RECOVERY, target->obd_flags);
wake_up(&target->obd_next_transno_waitq);
}
spin_unlock(&target->obd_dev_lock);
return 0;
}
/*
* --------------------------------------------------------------------------
* from old lib/target.c
* --------------------------------------------------------------------------
*/
static int target_handle_reconnect(struct lustre_handle *conn,
struct obd_export *exp,
struct obd_uuid *cluuid)
{
struct obd_device *target;
struct lustre_handle *hdl;
ktime_t remaining;
s64 timeout;
int rc = 0;
ENTRY;
if (!exp->exp_connection ||
!lustre_handle_is_used(&exp->exp_imp_reverse->imp_remote_handle)) {
conn->cookie = exp->exp_handle.h_cookie;
CDEBUG(D_HA,
"connect export for UUID '%s' at %p, cookie %#llx\n",
cluuid->uuid, exp, conn->cookie);
RETURN(0);
}
target = exp->exp_obd;
hdl = &exp->exp_imp_reverse->imp_remote_handle;
/* Might be a re-connect after a partition. */
if (memcmp(&conn->cookie, &hdl->cookie, sizeof(conn->cookie))) {
LCONSOLE_WARN("%s: already connected client %s (at %s) with handle %#llx. Rejecting client with the same UUID trying to reconnect with handle %#llx\n",
target->obd_name,
obd_uuid2str(&exp->exp_client_uuid),
obd_export_nid2str(exp),
hdl->cookie, conn->cookie);
memset(conn, 0, sizeof(*conn));
/*
* target_handle_connect() treats EALREADY and
* -EALREADY differently. -EALREADY is an error
* (same UUID, different handle).
*/
RETURN(-EALREADY);
}
if (!test_bit(OBDF_RECOVERING, target->obd_flags)) {
LCONSOLE_WARN("%s: Client %s (at %s) reconnecting\n",
target->obd_name, obd_uuid2str(&exp->exp_client_uuid),
obd_export_nid2str(exp));
GOTO(out_already, rc);
}
remaining = hrtimer_get_remaining(&target->obd_recovery_timer);
timeout = ktime_divns(remaining, NSEC_PER_SEC);
if (timeout > 0) {
LCONSOLE_WARN("%s: Client %s (at %s) reconnected, waiting for %d clients in recovery for %lld:%.02lld\n",
target->obd_name,
obd_uuid2str(&exp->exp_client_uuid),
obd_export_nid2str(exp),
atomic_read(&target->obd_max_recoverable_clients),
timeout / 60, timeout % 60);
} else {
struct target_distribute_txn_data *tdtd;
int size = 0;
int count = 0;
char *buf = NULL;
target_check_recovery_timer(target);
tdtd = class_exp2tgt(exp)->lut_tdtd;
if (tdtd && tdtd->tdtd_show_update_logs_retrievers)
buf = tdtd->tdtd_show_update_logs_retrievers(
tdtd->tdtd_show_retrievers_cbdata,
&size, &count);
if (count > 0)
LCONSOLE_WARN("%s: Client %s (at %s) reconnecting, waiting for %d MDTs (%s) in recovery for %lld:%.02lld. Please wait until all MDTs recovered or you may force MDT evicition via 'lctl --device %s abort_recovery.\n",
target->obd_name,
obd_uuid2str(&exp->exp_client_uuid),
obd_export_nid2str(exp), count,
buf ? buf : "unknown (not enough RAM)",
(abs(timeout) + target->obd_recovery_timeout) / 60,
(abs(timeout) + target->obd_recovery_timeout) % 60,
target->obd_name);
else
LCONSOLE_WARN("%s: Recovery already passed deadline %lld:%.02lld. If you do not want to wait more, you may force taget eviction via 'lctl --device %s abort_recovery.\n",
target->obd_name, abs(timeout) / 60,
abs(timeout) % 60, target->obd_name);
OBD_FREE(buf, size);
}
out_already:
conn->cookie = exp->exp_handle.h_cookie;
/*
* target_handle_connect() treats EALREADY and
* -EALREADY differently. EALREADY means we are
* doing a valid reconnect from the same client.
*/
RETURN(EALREADY);
}
static void
check_and_start_recovery_timer(struct obd_device *obd,
struct ptlrpc_request *req, int new_client);
/**
* update flags for import during reconnect process
*/
static int rev_import_flags_update(struct obd_import *revimp,
struct ptlrpc_request *req)
{
int rc;
struct obd_connect_data *data;
data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
if (data->ocd_connect_flags & OBD_CONNECT_AT)
revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
else
revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
revimp->imp_connect_data = *data;
rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
if (rc) {
CERROR("%s: cannot get reverse import %s security: rc = %d\n",
revimp->imp_client->cli_name,
libcfs_idstr(&req->rq_peer), rc);
return rc;
}
return 0;
}
/**
* Allocate a new reverse import for an export.
*
* \retval -errno in case error hit
* \retval 0 if reverse import correctly init
**/
int rev_import_init(struct obd_export *export)
{
struct obd_device *obd = export->exp_obd;
struct obd_import *revimp;
int rc = 0;
LASSERT(export->exp_imp_reverse == NULL);
revimp = class_new_import(obd);
if (revimp == NULL)
return -ENOMEM;
revimp->imp_remote_handle.cookie = 0ULL;
revimp->imp_client = &obd->obd_ldlm_client;
set_bit(IMPF_DLM_FAKE, revimp->imp_flags);
/* it is safe to connect import in new state as no sends possible */
spin_lock(&export->exp_lock);
export->exp_imp_reverse = revimp;
spin_unlock(&export->exp_lock);
class_import_put(revimp);
if (export->exp_timed) {
void *data;
rc = obd_export_timed_init(export, &data);
if (rc == 0) {
spin_lock(&obd->obd_dev_lock);
/* At the beginning, there is no AT stats yet, use
* previous approach for the ping evictor timeout */
export->exp_deadline =
PING_EVICT_TIMEOUT + ktime_get_real_seconds();
obd_export_timed_add(export, &data);
spin_unlock(&obd->obd_dev_lock);
obd_export_timed_fini(export, &data);
}
}
return rc;
}
EXPORT_SYMBOL(rev_import_init);
/**
* Handle reconnect for an export.
*
* \param exp export to handle reconnect process
* \param req client reconnect request
*
* \retval -rc in case securitfy flavor can't be changed
* \retval 0 in case none problems
*/
static int rev_import_reconnect(struct obd_export *exp,
struct ptlrpc_request *req)
{
struct obd_import *revimp = exp->exp_imp_reverse;
struct lustre_handle *lh;
int rc;
/* avoid sending a request until import flags are changed */
ptlrpc_import_enter_resend(revimp);
ptlrpc_connection_put(revimp->imp_connection);
/*
* client from recovery don't have a handle so we need to take from
* request. it may produce situation when wrong client connected
* to recovery as we trust a client uuid
*/
lh = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
revimp->imp_remote_handle = *lh;
/*
* unknown versions will be caught in
* ptlrpc_handle_server_req_in->lustre_unpack_msg()
*/
revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
revimp->imp_connection = ptlrpc_connection_addref(exp->exp_connection);
rc = rev_import_flags_update(revimp, req);
if (rc != 0) {
/*
* it is safe to still be in RECOVERY phase as we are not able
* to setup correct security flavor so requests are not able to
* be delivered correctly
*/
return rc;
}
/* resend all rpc's via new connection */
return ptlrpc_import_recovery_state_machine(revimp);
}
int target_handle_connect(struct ptlrpc_request *req)
{
struct obd_device *target = NULL;
struct obd_export *export = NULL;
/*
* connect handle - filled from target_handle_reconnect in
* reconnect case
*/
struct lustre_handle conn;
struct lustre_handle *tmp;
struct obd_uuid cluuid;
char *str;
int rc = 0;
char *target_start;
int target_len;
bool mds_conn = false, lw_client = false, initial_conn = false;
bool mds_mds_conn = false;
bool new_mds_mds_conn = false;
struct obd_connect_data *data, *tmpdata;
int size, tmpsize;
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
int tmp_exp_old_falloc;
#endif
struct ptlrpc_connection *pcon = NULL;
bool reconnected = false;
ENTRY;
CFS_RACE(OBD_FAIL_TGT_CONN_RACE);
str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
if (str == NULL) {
DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
GOTO(out, rc = -EINVAL);
}
target = class_str2obd(str);
if (!target) {
deuuidify(str, NULL, &target_start, &target_len);
CERROR_SLOW(5,
"%.*s: not available for connect from %s (no target). If you are running an HA pair check that the target is mounted on the other server.\n",
target_len, target_start,
libcfs_nidstr(&req->rq_peer.nid));
GOTO(out, rc = -ENODEV);
}
atomic_inc(&target->obd_conn_inprogress);
if (test_bit(OBDF_STOPPING, target->obd_flags) ||
!test_bit(OBDF_SET_UP, target->obd_flags)) {
deuuidify(str, NULL, &target_start, &target_len);
LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
target_len, target_start,
libcfs_nidstr(&req->rq_peer.nid),
(test_bit(OBDF_STOPPING, target->obd_flags) ?
"stopping" : "not set up"));
GOTO(out, rc = -ENODEV);
}
/* allow only local connection for MGS */
if (target->obd_no_conn && !(nid_is_lo0(&req->rq_peer.nid) &&
!strcmp(target->obd_name, LUSTRE_MGS_OBDNAME))) {
CDEBUG(D_INFO,
"%s: Temporarily refusing client connection from %s\n",
target->obd_name, libcfs_nidstr(&req->rq_peer.nid));
GOTO(out, rc = -EAGAIN);
}
str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
if (str == NULL) {
DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
GOTO(out, rc = -EINVAL);
}
obd_str2uuid(&cluuid, str);
tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
if (tmp == NULL)
GOTO(out, rc = -EPROTO);
conn = *tmp;
size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
RCL_CLIENT);
if (size < 0 || size > 8 * sizeof(struct obd_connect_data))
GOTO(out, rc = -EPROTO);
data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
if (!data)
GOTO(out, rc = -EPROTO);
rc = req_capsule_server_pack(&req->rq_pill);
if (rc)
GOTO(out, rc);
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
/*
* Don't allow clients to connect that are using old 1.8 format
* protocol conventions (LUSTRE_MSG_MAGIC_v1, !MSGHDR_CKSUM_INCOMPAT18,
* ldlm_flock_policy_wire format, MDT_ATTR_xTIME_SET, etc). The
* FULL20 flag should be set on all connections since 2.0, but no
* longer affects behaviour.
*
* Later this check will be disabled and the flag can be retired
* completely once interop with 3.0 is no longer needed.
*/
if (!(data->ocd_connect_flags & OBD_CONNECT_FULL20))
GOTO(out, rc = -EPROTO);
/* Old clients will have 'tmp_exp_old_falloc' as 1.
* Newer clients (2.15) and beyond will have it set as 0
*/
tmp_exp_old_falloc =
!!(data->ocd_connect_flags & OBD_CONNECT_OLD_FALLOC);
CDEBUG(D_INFO, "%s: ocd_connect_flags: %#llx tmp_exp_old_falloc: %d\n",
target->obd_name, data->ocd_connect_flags, tmp_exp_old_falloc);
/*
* Don't allow liblustre clients to connect.
* - testing was disabled in v2_2_50_0-61-g6a75d65
* - building was disabled in v2_5_58_0-28-g7277179
* - client code was deleted in v2_6_50_0-101-gcdfbc72,
* - clients were refused connect for version difference > 0.0.1.32
*/
if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
DEBUG_REQ(D_WARNING, req, "Refusing libclient connection");
GOTO(out, rc = -EPROTO);
}
#endif
/*
* Note: lw_client is needed in MDS-MDS failover during update log
* processing, so we needs to allow lw_client to be connected at
* anytime, instead of only the initial connection
*/
lw_client = OCD_HAS_FLAG(data, LIGHTWEIGHT);
if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) {
initial_conn = true;
mds_conn = OCD_HAS_FLAG(data, MDS);
mds_mds_conn = OCD_HAS_FLAG(data, MDS_MDS);
/*
* OBD_CONNECT_MNE_SWAB is removed at 2.14
* Checking OBD_CONNECT_FID can be removed in the future.
*
* Via check OBD_CONNECT_FID, we can distinguish whether
* the OBD_CONNECT_MDS_MDS/OBD_CONNECT_MNE_SWAB is from
* MGC or MDT, since MGC does not use OBD_CONNECT_FID.
*/
if (!lw_client &&
(data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
(data->ocd_connect_flags & OBD_CONNECT_FID) &&
(data->ocd_connect_flags & OBD_CONNECT_VERSION)) {
__u32 major = OBD_OCD_VERSION_MAJOR(data->ocd_version);
__u32 minor = OBD_OCD_VERSION_MINOR(data->ocd_version);
__u32 patch = OBD_OCD_VERSION_PATCH(data->ocd_version);
/*
* We do not support the MDT-MDT interoperations with
* different version MDT because of protocol changes.
*/
if (unlikely(major != LUSTRE_MAJOR ||
minor != LUSTRE_MINOR ||
abs(patch - LUSTRE_PATCH) > 3)) {
LCONSOLE_WARN("%s (%u.%u.%u.%u) refused the connection from different version MDT (%d.%d.%d.%d) %s %s\n",
target->obd_name, LUSTRE_MAJOR,
LUSTRE_MINOR, LUSTRE_PATCH,
LUSTRE_FIX, major, minor, patch,
OBD_OCD_VERSION_FIX(data->ocd_version),
libcfs_nidstr(&req->rq_peer.nid),
str);
GOTO(out, rc = -EPROTO);
}
}
}
/* lctl gets a backstage, all-access pass. */
if (obd_uuid_equals(&cluuid, &target->obd_uuid))
goto dont_check_exports;
export = obd_uuid_lookup(target, &cluuid);
if (!export)
goto no_export;
/* We've found an export in the hash. */
spin_lock(&export->exp_lock);
if (export->exp_connecting) { /* b=9635, et. al. */
spin_unlock(&export->exp_lock);
LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
export->exp_obd->obd_name, export,
libcfs_nidstr(&req->rq_peer.nid));
class_export_put(export);
export = NULL;
rc = -EALREADY;
} else if ((mds_conn || (lw_client && initial_conn) ||
OCD_HAS_FLAG(data, MDS_MDS)) && export->exp_connection) {
spin_unlock(&export->exp_lock);
if (!nid_same(&req->rq_peer.nid,
&export->exp_connection->c_peer.nid)) {
/* MDS or LWP reconnected after failover. */
LCONSOLE_WARN("%s: Received %s connection from %s, removing former export from %s\n",
target->obd_name,
lw_client ? "LWP" : "MDS",
libcfs_nidstr(&req->rq_peer.nid),
libcfs_nidstr(&export->exp_connection->c_peer.nid));
} else {
/* New connection from the same NID. */
LCONSOLE_WARN("%s: Received new %s connection from %s, %s former export from same NID\n",
target->obd_name,
lw_client ? "LWP" : "MDS",
libcfs_nidstr(&req->rq_peer.nid),
OCD_HAS_FLAG(data, MDS_MDS) ?
"keep" : "remove");
}
if (nid_same(&req->rq_peer.nid,
&export->exp_connection->c_peer.nid) &&
OCD_HAS_FLAG(data, MDS_MDS)) {
/*
* Because exports between MDTs will always be
* kept, let's do not fail such export if they
* come from the same NID, otherwise it might
* cause eviction between MDTs, which might
* cause namespace inconsistency.
*
* target_handle_connect() checks +EALREADY specially.
*/
spin_lock(&export->exp_lock);
export->exp_connecting = 1;
export->exp_conn_cnt = 0;
spin_unlock(&export->exp_lock);
conn.cookie = export->exp_handle.h_cookie;
rc = EALREADY;
} else {
class_fail_export(export);
class_export_put(export);
export = NULL;
rc = 0;
}
} else if (export->exp_connection != NULL && initial_conn &&
!nid_same(&req->rq_peer.nid,
&export->exp_connection->c_peer.nid)) {
spin_unlock(&export->exp_lock);
/* In MDS failover we have static UUID but NID can change. */
LCONSOLE_WARN("%s: Client %s seen on new nid %s when existing nid %s is already connected\n",
target->obd_name, cluuid.uuid,
libcfs_nidstr(&req->rq_peer.nid),
libcfs_nidstr(
&export->exp_connection->c_peer.nid));
rc = -EALREADY;
class_export_put(export);
export = NULL;
} else if (CFS_FAIL_PRECHECK(OBD_FAIL_TGT_RECOVERY_CONNECT) &&
!lw_client) {
spin_unlock(&export->exp_lock);
rc = -EAGAIN;
} else {
export->exp_connecting = 1;
spin_unlock(&export->exp_lock);
LASSERT(export->exp_obd == target);
rc = target_handle_reconnect(&conn, export, &cluuid);
}
/* If we found an export, we already unlocked. */
if (!export) {
no_export:
CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
} else if (req->rq_export == NULL &&
atomic_read(&export->exp_rpc_count) > 0) {
LCONSOLE_WARN("%s: Client %s (at %s) refused connection, still busy with %d references\n",
target->obd_name, cluuid.uuid,
libcfs_nidstr(&req->rq_peer.nid),
refcount_read(&export->exp_handle.h_ref));
GOTO(out, rc = -EBUSY);
} else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1 &&
rc != EALREADY) {
if (!strstr(cluuid.uuid, "mdt"))
LCONSOLE_WARN("%s: Rejecting reconnect from the known client %s (at %s) because it is indicating it is a new client\n",
target->obd_name, cluuid.uuid,
libcfs_nidstr(&req->rq_peer.nid));
GOTO(out, rc = -EALREADY);
} else {
CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
}
if (rc < 0)
GOTO(out, rc);
CDEBUG(D_HA, "%s: connection from %s@%s %st%llu exp %p cur %lld last %lld\n",
target->obd_name, cluuid.uuid, libcfs_nidstr(&req->rq_peer.nid),
test_bit(OBDF_RECOVERING, target->obd_flags) ? "recovering/" : "", data->ocd_transno,
export, ktime_get_seconds(),
export ? export->exp_last_request_time : 0);
/*
* If this is the first time a client connects, reset the recovery
* timer. Discard lightweight connections which might be local.
*/
if (!lw_client && rc == 0 && test_bit(OBDF_RECOVERING, target->obd_flags))
check_and_start_recovery_timer(target, req, export == NULL);
/*
* We want to handle EALREADY but *not* -EALREADY from
* target_handle_reconnect(), return reconnection state in a flag.
*/
if (rc == EALREADY) {
lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
rc = 0;
} else {
LASSERT(rc == 0);
}
/* Tell the client if we support replayable requests. */
if (test_bit(OBDF_REPLAYABLE, target->obd_flags))
lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
if (export == NULL) {
/* allow lightweight connections during recovery */
/*
* allow "new" MDT to be connected during recovery, since we
* need retrieve recovery update records from it
*/
if (test_bit(OBDF_RECOVERING, target->obd_flags) &&
!lw_client && !mds_mds_conn) {
struct hrtimer *timer = &target->obd_recovery_timer;
ktime_t remaining;
s64 timeout, left;
int in_progress;
int connected;
int known;
int stale;
char *msg;
connected = atomic_read(&target->obd_connected_clients);
in_progress = atomic_read(&target->obd_lock_replay_clients);
known =
atomic_read(&target->obd_max_recoverable_clients);
stale = target->obd_stale_clients;
remaining = hrtimer_get_remaining(timer);
left = ktime_divns(remaining, NSEC_PER_SEC);
if (ktime_to_ns(remaining) > 0) {
msg = "to recover in";
timeout = left;
} else {
msg = "already passed deadline";
timeout = -left;
target_check_recovery_timer(target);
}
LCONSOLE_WARN("%s: Denying connection for new client %s (at %s), waiting for %d known clients (%d recovered, %d in progress, and %d evicted) %s %lld:%.02lld\n",
target->obd_name, cluuid.uuid,
libcfs_nidstr(&req->rq_peer.nid), known,
connected - in_progress, in_progress,
stale, msg, timeout / 60, timeout % 60);
rc = -EBUSY;
} else {
dont_check_exports:
rc = obd_connect(req->rq_svc_thread->t_env,
&export, target, &cluuid, data, req);
if (mds_conn && CFS_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
lustre_msg_add_op_flags(req->rq_repmsg,
MSG_CONNECT_RECOVERING);
if (rc == 0) {
conn.cookie = export->exp_handle.h_cookie;
rc = rev_import_init(export);
}
if (mds_mds_conn)
new_mds_mds_conn = true;
}
} else {
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_CONNECT_VS_EVICT)) {
class_export_get(export);
class_fail_export(export);
class_export_put(export);
}
rc = obd_reconnect(req->rq_svc_thread->t_env,
export, target, &cluuid, data, req);
if (rc == 0) {
reconnected = true;
/*
* In case of recovery,
* tgt_clients_data_init() created the export,
* exp_imp_reverse is still needed.
*/
if (export->exp_imp_reverse == NULL)
rc = rev_import_init(export);
}
}
if (rc)
GOTO(out, rc);
data->ocd_instance = obd2obt(target)->obt_instance;
/*
* Return only the parts of obd_connect_data that we understand, so the
* client knows that we don't understand the rest.
*/
if (data) {
tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
RCL_SERVER);
tmpdata = req_capsule_server_get(&req->rq_pill,
&RMF_CONNECT_DATA);
/*
* Don't use struct assignment here, because the client reply
* buffer may be smaller/larger than the local struct
* obd_connect_data.
*/
memcpy(tmpdata, data, min(tmpsize, size));
}
/*
* If the client and the server are the same node, we will already
* have an export that really points to the client's DLM export,
* because we have a shared handles table.
*
* XXX this will go away when shaver stops sending the "connect" handle
* in the real "remote handle" field of the request --phik 24 Apr 2003
*/
ptlrpc_request_change_export(req, export);
pcon = ptlrpc_connection_get(&req->rq_peer,
&req->rq_self, &cluuid);
if (pcon == NULL)
GOTO(out, rc = -ENOTCONN);
spin_lock(&export->exp_lock);
if (export->exp_disconnected) {
spin_unlock(&export->exp_lock);
if (reconnected) {
/*
* for each connect called disconnect
* should be called to cleanup stuff
*/
spin_lock(&target->obd_dev_lock);
obd_export_timed_del(export);
spin_unlock(&target->obd_dev_lock);
class_export_get(export);
obd_disconnect(export);
}
GOTO(out, rc = -ENODEV);
}
if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
spin_unlock(&export->exp_lock);
CDEBUG(D_RPCTRACE,
"%s: %s already connected at greater or equal conn_cnt: %d >= %d\n",
cluuid.uuid, libcfs_nidstr(&req->rq_peer.nid),
export->exp_conn_cnt,
lustre_msg_get_conn_cnt(req->rq_reqmsg));
GOTO(out, rc = -EALREADY);
}
LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
/* make 'tmp_exp_old_falloc' persistent by saving it into
* server side export object(obd_export)
*/
export->exp_old_falloc = tmp_exp_old_falloc;
#endif
/* Check to see if connection came from another NID. */
if (export->exp_connection != NULL &&
!nid_same(&export->exp_connection->c_peer.nid,
&req->rq_peer.nid)) {
obd_nid_del(export->exp_obd, export);
ptlrpc_connection_put(export->exp_connection);
export->exp_connection = NULL;
}
if (export->exp_connection == NULL) {
export->exp_connection = pcon;
pcon = NULL;
}
obd_nid_add(export->exp_obd, export);
spin_unlock(&export->exp_lock);
lustre_msg_set_handle(req->rq_repmsg, &conn);
rc = rev_import_reconnect(export, req);
if (rc != 0)
GOTO(out, rc);
if (test_bit(OBDF_RECOVERING, target->obd_flags) &&
!export->exp_in_recovery && !lw_client) {
int has_transno;
__u64 transno = data->ocd_transno;
spin_lock(&export->exp_lock);
/*
* possible race with class_disconnect_stale_exports,
* export may be already in the eviction process
*/
if (export->exp_failed) {
spin_unlock(&export->exp_lock);
GOTO(out, rc = -ENODEV);
}
export->exp_in_recovery = 1;
export->exp_req_replay_needed = 1;
export->exp_lock_replay_needed = 1;
spin_unlock(&export->exp_lock);
has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
MSG_CONNECT_TRANSNO);
if (has_transno && transno == 0)
CWARN("Connect with zero transno!\n");
if (has_transno && transno > 0 &&
transno < target->obd_next_recovery_transno &&
transno > target->obd_last_committed) {
/* Another way is to use cmpxchg() to be lock-free. */
spin_lock(&target->obd_recovery_task_lock);
if (transno < target->obd_next_recovery_transno)
target->obd_next_recovery_transno = transno;
spin_unlock(&target->obd_recovery_task_lock);
}
atomic_inc(&target->obd_req_replay_clients);
atomic_inc(&target->obd_lock_replay_clients);
/*
* Note: MDS-MDS connection is allowed to be connected during
* recovery, no matter if the exports needs to be recoveried.
* Because we need retrieve updates logs from all other MDTs.
* So if the MDS-MDS export is new, obd_max_recoverable_clients
* also needs to be increased to match other recovery checking
* condition.
*/
if (new_mds_mds_conn)
atomic_inc(&target->obd_max_recoverable_clients);
if (atomic_inc_return(&target->obd_connected_clients) ==
atomic_read(&target->obd_max_recoverable_clients))
wake_up(&target->obd_next_transno_waitq);
}
/* Tell the client we're in recovery, when client is involved in it. */
if (test_bit(OBDF_RECOVERING, target->obd_flags) && !lw_client)
lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
out:
if (export) {
spin_lock(&export->exp_lock);
export->exp_connecting = 0;
spin_unlock(&export->exp_lock);
class_export_put(export);
}
if (target) {
if (atomic_dec_and_test(&target->obd_conn_inprogress))
wake_up_var(&target->obd_conn_inprogress);
class_decref(target, "find", current);
}
if (pcon)
ptlrpc_connection_put(pcon);
req->rq_status = rc;
RETURN(rc);
}
int target_handle_disconnect(struct ptlrpc_request *req)
{
int rc;
ENTRY;
rc = req_capsule_server_pack(&req->rq_pill);
if (rc)
RETURN(rc);
/* In case of target disconnect, updating sec ctx immediately is
* required in order to record latest sequence number used.
* Sequence is normally updated on export destroy, but this event
* can occur too late, ie after a new target connect request has
* been processed.
* Maintaining correct sequence when client connection becomes idle
* ensures that GSS does not erroneously consider requests as replays.
*/
rc = sptlrpc_export_update_ctx(req->rq_export);
if (rc)
RETURN(rc);
/* Keep the rq_export around so we can send the reply. */
req->rq_status = obd_disconnect(class_export_get(req->rq_export));
RETURN(0);
}
void target_destroy_export(struct obd_export *exp)
{
struct obd_import *imp = NULL;
/*
* exports created from last_rcvd data, and "fake"
* exports created by lctl don't have an import
*/
spin_lock(&exp->exp_lock);
if (exp->exp_imp_reverse != NULL) {
imp = exp->exp_imp_reverse;
exp->exp_imp_reverse = NULL;
}
spin_unlock(&exp->exp_lock);
if (imp != NULL)
client_destroy_import(imp);
LASSERT(atomic_read(&exp->exp_locks_count) == 0);
LASSERT(atomic_read(&exp->exp_rpc_count) == 0);
LASSERT(atomic_read(&exp->exp_cb_count) == 0);
LASSERT(atomic_read(&exp->exp_replay_count) == 0);
}
EXPORT_SYMBOL(target_destroy_export);
/*
* Recovery functions
*/
static void target_request_copy_get(struct ptlrpc_request *req)
{
class_export_rpc_inc(req->rq_export);
LASSERT(list_empty(&req->rq_list));
INIT_LIST_HEAD(&req->rq_replay_list);
/* Increase refcount to keep request in queue. */
atomic_inc(&req->rq_refcount);
/* Let export know it has replays to be handled. */
atomic_inc(&req->rq_export->exp_replay_count);
}
static void target_request_copy_put(struct ptlrpc_request *req)
{
LASSERT(list_empty(&req->rq_replay_list));
LASSERT(atomic_read(&(req)->rq_export->exp_replay_count) > 0);
atomic_dec(&req->rq_export->exp_replay_count);
class_export_rpc_dec(req->rq_export);
ptlrpc_server_drop_request(req);
}
static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
{
__u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
struct obd_export *exp = req->rq_export;
struct ptlrpc_request *reqiter;
struct ptlrpc_request *dup_req = NULL;
int dup = 0;
LASSERT(exp);
spin_lock(&exp->exp_lock);
list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
rq_replay_list) {
if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
dup_req = reqiter;
dup = 1;
break;
}
}
if (dup) {
/* We expect it with RESENT and REPLAY flags. */
if ((lustre_msg_get_flags(req->rq_reqmsg) &
(MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
CERROR("invalid flags %x of resent replay\n",
lustre_msg_get_flags(req->rq_reqmsg));
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
__u32 new_conn;
new_conn = lustre_msg_get_conn_cnt(req->rq_reqmsg);
if (new_conn >
lustre_msg_get_conn_cnt(dup_req->rq_reqmsg))
lustre_msg_set_conn_cnt(dup_req->rq_reqmsg,
new_conn);
}
} else {
list_add_tail(&req->rq_replay_list,
&exp->exp_req_replay_queue);
}
spin_unlock(&exp->exp_lock);
return dup;
}
static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
{
LASSERT(!list_empty(&req->rq_replay_list));
LASSERT(req->rq_export);
spin_lock(&req->rq_export->exp_lock);
list_del_init(&req->rq_replay_list);
spin_unlock(&req->rq_export->exp_lock);
}
static void target_finish_recovery(struct lu_target *lut)
{
struct obd_device *obd = lut->lut_obd;
ENTRY;
/* Only log a recovery message when recovery has occurred. */
if (obd->obd_recovery_start) {
time64_t now = ktime_get_seconds();
time64_t elapsed_time;
elapsed_time = max_t(time64_t, now - obd->obd_recovery_start,
1);
LCONSOLE_INFO("%s: Recovery over after %lld:%.02lld, of %d clients %d recovered and %d %s evicted.\n",
obd->obd_name, elapsed_time / 60,
elapsed_time % 60,
atomic_read(&obd->obd_max_recoverable_clients),
atomic_read(&obd->obd_connected_clients),
obd->obd_stale_clients,
obd->obd_stale_clients == 1 ? "was" : "were");
if (obd->obd_stale_clients &&
do_dump_on_eviction(obd, DUMP_RECOVERY_STALE))
libcfs_debug_dumplog();
}
ldlm_reprocess_recovery_done(obd->obd_namespace);
spin_lock(&obd->obd_recovery_task_lock);
if (!list_empty(&obd->obd_req_replay_queue) ||
!list_empty(&obd->obd_lock_replay_queue) ||
!list_empty(&obd->obd_final_req_queue)) {
CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
obd->obd_name,
list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
list_empty(&obd->obd_lock_replay_queue) ?
"" : "lock ",
list_empty(&obd->obd_final_req_queue) ?
"" : "final ");
spin_unlock(&obd->obd_recovery_task_lock);
LBUG();
}
spin_unlock(&obd->obd_recovery_task_lock);
obd->obd_recovery_end = ktime_get_seconds();
/* When recovery finished, cleanup orphans on MDS and OST. */
if (obd->obd_type && obd->obd_type->typ_dt_ops->o_postrecov) {
int rc = obd->obd_type->typ_dt_ops->o_postrecov(obd);
if (rc < 0)
LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
obd->obd_name, rc);
}
EXIT;
}
static void abort_req_replay_queue(struct obd_device *obd)
{
struct ptlrpc_request *req, *n;
LIST_HEAD(abort_list);
spin_lock(&obd->obd_recovery_task_lock);
list_splice_init(&obd->obd_req_replay_queue, &abort_list);
spin_unlock(&obd->obd_recovery_task_lock);
list_for_each_entry_safe(req, n, &abort_list, rq_list) {
DEBUG_REQ(D_WARNING, req, "aborted:");
req->rq_status = -ENOTCONN;
if (ptlrpc_error(req)) {
DEBUG_REQ(D_ERROR, req,
"failed abort_req_reply; skipping");
}
target_exp_dequeue_req_replay(req);
target_request_copy_put(req);
}
}
static void abort_lock_replay_queue(struct obd_device *obd)
{
struct ptlrpc_request *req, *n;
LIST_HEAD(abort_list);
spin_lock(&obd->obd_recovery_task_lock);
list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
spin_unlock(&obd->obd_recovery_task_lock);
list_for_each_entry_safe(req, n, &abort_list, rq_list) {
DEBUG_REQ(D_ERROR, req, "aborted:");
req->rq_status = -ENOTCONN;
if (ptlrpc_error(req)) {
DEBUG_REQ(D_ERROR, req,
"failed abort_lock_reply; skipping");
}
target_request_copy_put(req);
}
}
/*
* Called from a cleanup function if the device is being cleaned up
* forcefully. The exports should all have been disconnected already,
* the only thing left to do is
* - clear the recovery flags
* - cancel the timer
* - free queued requests and replies, but don't send replies
* Because the OBDF_STOPPING flag is set, no new requests should be received.
*/
void target_cleanup_recovery(struct obd_device *obd)
{
struct ptlrpc_request *req, *n;
LIST_HEAD(clean_list);
spin_lock(&obd->obd_dev_lock);
if (!test_bit(OBDF_RECOVERING, obd->obd_flags)) {
spin_unlock(&obd->obd_dev_lock);
EXIT;
return;
}
clear_bit(OBDF_RECOVERING, obd->obd_flags);
clear_bit(OBDF_ABORT_RECOVERY, obd->obd_flags);
clear_bit(OBDF_ABORT_MDT_RECOVERY, obd->obd_flags);
spin_unlock(&obd->obd_dev_lock);
spin_lock(&obd->obd_recovery_task_lock);
target_cancel_recovery_timer(obd);
list_splice_init(&obd->obd_req_replay_queue, &clean_list);
spin_unlock(&obd->obd_recovery_task_lock);
list_for_each_entry_safe(req, n, &clean_list, rq_list) {
LASSERT(req->rq_reply_state == NULL);
target_exp_dequeue_req_replay(req);
target_request_copy_put(req);
}
spin_lock(&obd->obd_recovery_task_lock);
list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
list_splice_init(&obd->obd_final_req_queue, &clean_list);
spin_unlock(&obd->obd_recovery_task_lock);
list_for_each_entry_safe(req, n, &clean_list, rq_list) {
LASSERT(req->rq_reply_state == NULL);
target_request_copy_put(req);
}
EXIT;
}
EXPORT_SYMBOL(target_cleanup_recovery);
/* obd_recovery_task_lock should be held */
void target_cancel_recovery_timer(struct obd_device *obd)
{
CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
hrtimer_cancel(&obd->obd_recovery_timer);
}
static void target_start_recovery_timer(struct obd_device *obd)
{
ktime_t delay;
if (obd->obd_recovery_start != 0)
return;
spin_lock(&obd->obd_dev_lock);
if (!test_bit(OBDF_RECOVERING, obd->obd_flags) ||
test_bit(OBDF_ABORT_RECOVERY, obd->obd_flags)) {
spin_unlock(&obd->obd_dev_lock);
return;
}
LASSERT(obd->obd_recovery_timeout != 0);
if (obd->obd_recovery_start != 0) {
spin_unlock(&obd->obd_dev_lock);
return;
}
obd->obd_recovery_start = ktime_get_seconds();
delay = ktime_set(obd->obd_recovery_start +
obd->obd_recovery_timeout,
NSEC_PER_SEC / 2);
hrtimer_start(&obd->obd_recovery_timer, delay, HRTIMER_MODE_ABS);
spin_unlock(&obd->obd_dev_lock);
LCONSOLE_WARN("%s: Will be in recovery for at least %u:%02u, or until %d client%s reconnect%s\n",
obd->obd_name,
obd->obd_recovery_timeout / 60,
obd->obd_recovery_timeout % 60,
atomic_read(&obd->obd_max_recoverable_clients),
(atomic_read(&obd->obd_max_recoverable_clients) == 1) ?
"" : "s",
(atomic_read(&obd->obd_max_recoverable_clients) == 1) ?
"s" : "");
}
/**
* extend recovery window.
*
* if @extend is true, extend recovery window to have @dr_timeout remaining
* at least; otherwise, make sure the recovery timeout value is not less
* than @dr_timeout.
*/
static void extend_recovery_timer(struct obd_device *obd, timeout_t dr_timeout,
bool extend)
{
ktime_t left_ns;
timeout_t timeout;
timeout_t left;
spin_lock(&obd->obd_dev_lock);
if (!test_bit(OBDF_RECOVERING, obd->obd_flags) ||
test_bit(OBDF_ABORT_RECOVERY, obd->obd_flags) ||
test_bit(OBDF_STOPPING, obd->obd_flags)) {
spin_unlock(&obd->obd_dev_lock);
return;
}
LASSERT(obd->obd_recovery_start != 0);
left_ns = hrtimer_get_remaining(&obd->obd_recovery_timer);
left = ktime_divns(left_ns, NSEC_PER_SEC);
if (extend) {
timeout = obd->obd_recovery_timeout;
/* dr_timeout will happen after the hrtimer has expired.
* Add the excess time to the soft recovery timeout without
* exceeding the hard recovery timeout.
*/
if (dr_timeout > left) {
timeout += dr_timeout - left;
timeout = min_t(timeout_t, obd->obd_recovery_time_hard,
timeout);
}
} else {
timeout = clamp_t(timeout_t, dr_timeout,
obd->obd_recovery_timeout,
obd->obd_recovery_time_hard);
}
if (timeout == obd->obd_recovery_time_hard)
CWARN("%s: extended recovery timer reached hard limit: %d, extend: %d\n",
obd->obd_name, timeout, extend);
if (obd->obd_recovery_timeout < timeout) {
ktime_t end, now;
obd->obd_recovery_timeout = timeout;
end = ktime_set(obd->obd_recovery_start + timeout,
NSEC_PER_SEC / 2);
now = ktime_set(ktime_get_seconds(), 0);
left_ns = ktime_sub(end, now);
hrtimer_start(&obd->obd_recovery_timer, end, HRTIMER_MODE_ABS);
left = ktime_divns(left_ns, NSEC_PER_SEC);
}
spin_unlock(&obd->obd_dev_lock);
CDEBUG(D_HA, "%s: recovery timer will expire in %d seconds\n",
obd->obd_name, left);
}
/* Reset the timer with each new client connection */
/*
* This timer is actually reconnect_timer, which is for making sure
* the total recovery window is at least as big as my reconnect
* attempt timing. So the initial recovery time_out will be set to
* OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
* from client is bigger than this, then the recovery time_out will
* be extended to make sure the client could be reconnected, in the
* process, the timeout from the new client should be ignored.
*/
static void
check_and_start_recovery_timer(struct obd_device *obd,
struct ptlrpc_request *req,
int new_client)
{
timeout_t service_timeout = lustre_msg_get_service_timeout(req->rq_reqmsg);
struct obd_device_target *obt = obd2obt(obd);
if (!new_client && service_timeout)
/*
* Teach server about old server's estimates, as first guess
* at how long new requests will take.
*/
obd_at_measure(obd, &req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
service_timeout);
target_start_recovery_timer(obd);
/*
* Convert the service time to RPC timeout,
* and reuse service_timeout to limit stack usage.
*/
service_timeout = at_est2timeout(service_timeout);
if (CFS_FAIL_CHECK(OBD_FAIL_TGT_SLUGGISH_NET) &&
service_timeout < at_extra)
service_timeout = at_extra;
/*
* We expect other clients to timeout within service_timeout, then try
* to reconnect, then try the failover server. The max delay between
* connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL.
*/
service_timeout += 2 * INITIAL_CONNECT_TIMEOUT;
LASSERT(obt->obt_magic == OBT_MAGIC);
service_timeout += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
if (service_timeout > obd->obd_recovery_timeout && !new_client)
extend_recovery_timer(obd, service_timeout, false);
}
/** Health checking routines */
static inline int exp_connect_healthy(struct obd_export *exp)
{
return exp->exp_in_recovery;
}
/** if export done req_replay or has replay in queue */
static inline int exp_req_replay_healthy(struct obd_export *exp)
{
return (!exp->exp_req_replay_needed ||
atomic_read(&exp->exp_replay_count) > 0);
}
static inline int exp_req_replay_healthy_or_from_mdt(struct obd_export *exp)
{
return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
exp_req_replay_healthy(exp);
}
/** if export done lock_replay or has replay in queue */
static inline int exp_lock_replay_healthy(struct obd_export *exp)
{
return (!exp->exp_lock_replay_needed ||
atomic_read(&exp->exp_replay_count) > 0);
}
static inline int exp_vbr_healthy(struct obd_export *exp)
{
return !exp->exp_vbr_failed;
}
static inline int exp_finished(struct obd_export *exp)
{
return exp->exp_in_recovery && !exp->exp_lock_replay_needed;
}
static inline int exp_finished_or_from_mdt(struct obd_export *exp)
{
return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
exp_finished(exp);
}
static int check_for_next_transno(struct lu_target *lut)
{
struct ptlrpc_request *req = NULL;
struct obd_device *obd = lut->lut_obd;
struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
int wake_up = 0, connected, completed, queue_len;
__u64 req_transno = 0;
__u64 update_transno = 0;
__u64 next_transno = 0;
ENTRY;
spin_lock(&obd->obd_recovery_task_lock);
if (!list_empty(&obd->obd_req_replay_queue)) {
req = list_first_entry(&obd->obd_req_replay_queue,
struct ptlrpc_request, rq_list);
req_transno = lustre_msg_get_transno(req->rq_reqmsg);
}
if (!obd_mdt_recovery_abort(obd) && tdtd)
update_transno = distribute_txn_get_next_transno(tdtd);
connected = atomic_read(&obd->obd_connected_clients);
completed = connected - atomic_read(&obd->obd_req_replay_clients);
queue_len = obd->obd_requests_queued_for_recovery;
next_transno = obd->obd_next_recovery_transno;
CDEBUG(D_HA,
"max: %d, connected: %d, completed: %d, queue_len: %d, req_transno: %llu, next_transno: %llu\n",
atomic_read(&obd->obd_max_recoverable_clients),
connected, completed,
queue_len, req_transno, next_transno);
if (obd_recovery_abort(obd)) {
CDEBUG(D_HA, "waking for aborted recovery\n");
wake_up = 1;
} else if (obd->obd_recovery_expired) {
CDEBUG(D_HA, "waking for expired recovery\n");
wake_up = 1;
} else if (!obd_mdt_recovery_abort(obd) && tdtd && req &&
is_req_replayed_by_update(req)) {
LASSERTF(req_transno < next_transno,
"req_transno %llu next_transno%llu\n", req_transno,
next_transno);
CDEBUG(D_HA, "waking for duplicate req (%llu)\n",
req_transno);
wake_up = 1;
} else if (req_transno == next_transno ||
(update_transno != 0 && update_transno <= next_transno)) {
CDEBUG(D_HA, "waking for next (%lld)\n", next_transno);
wake_up = 1;
} else if (queue_len > 0 &&
queue_len == atomic_read(&obd->obd_req_replay_clients)) {
/** handle gaps occured due to lost reply or VBR */
LASSERTF(req_transno >= next_transno,
"req_transno: %llu, next_transno: %llu\n",
req_transno, next_transno);
CDEBUG(D_HA,
"%s: waking for gap in transno, VBR is %s (skip: %lld, ql: %d, comp: %d, conn: %d, next: %lld, next_update %lld last_committed: %lld)\n",
obd->obd_name, test_bit(OBDF_VERSION_RECOV, obd->obd_flags) ? "ON" : "OFF",
next_transno, queue_len, completed, connected,
req_transno, update_transno, obd->obd_last_committed);
obd->obd_next_recovery_transno = req_transno;
wake_up = 1;
} else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
CDEBUG(D_HA, "waking for completed recovery\n");
wake_up = 1;
} else if (CFS_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
CDEBUG(D_HA,
"accepting transno gaps is explicitly allowed by fail_lock, waking up (%lld)\n",
next_transno);
obd->obd_next_recovery_transno = req_transno;
wake_up = 1;
}
spin_unlock(&obd->obd_recovery_task_lock);
return wake_up;
}
static int check_for_next_lock(struct lu_target *lut)
{
struct obd_device *obd = lut->lut_obd;
int wake_up = 0;
spin_lock(&obd->obd_recovery_task_lock);
if (!list_empty(&obd->obd_lock_replay_queue)) {
CDEBUG(D_HA, "waking for next lock\n");
wake_up = 1;
} else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
CDEBUG(D_HA, "waking for completed lock replay\n");
wake_up = 1;
} else if (test_bit(OBDF_ABORT_RECOVERY, obd->obd_flags)) {
CDEBUG(D_HA, "waking for aborted recovery\n");
wake_up = 1;
} else if (obd->obd_recovery_expired) {
CDEBUG(D_HA, "waking for expired recovery\n");
wake_up = 1;
}
spin_unlock(&obd->obd_recovery_task_lock);
return wake_up;
}
static int check_update_llog(struct lu_target *lut)
{
struct obd_device *obd = lut->lut_obd;
struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
if (obd_mdt_recovery_abort(obd)) {
CDEBUG(D_HA, "waking for aborted recovery\n");
return 1;
}
if (atomic_read(&tdtd->tdtd_recovery_threads_count) == 0) {
CDEBUG(D_HA, "waking for completion of reading update log\n");
return 1;
}
return 0;
}
/**
* wait for recovery events,
* check its status with help of check_routine
* evict dead clients via health_check
*/
static int target_recovery_overseer(struct lu_target *lut,
int (*check_routine)(struct lu_target *),
int (*health_check)(struct obd_export *))
{
struct obd_device *obd = lut->lut_obd;
struct target_distribute_txn_data *tdtd;
time64_t last = 0;
time64_t now;
repeat:
if (test_bit(OBDF_RECOVERING, obd->obd_flags) && obd->obd_recovery_start == 0) {
now = ktime_get_seconds();
if (now - last > 600) {
LCONSOLE_INFO("%s: in recovery but waiting for the first client to connect\n",
obd->obd_name);
last = now;
}
}
if (obd->obd_recovery_start != 0 && ktime_get_seconds() >=
(obd->obd_recovery_start + obd->obd_recovery_time_hard)) {
__u64 next_update_transno = 0;
/*
* Only abort the recovery if there are no update recovery
* left in the queue
*/
spin_lock(&obd->obd_recovery_task_lock);
if (!obd_mdt_recovery_abort(obd) && lut->lut_tdtd) {
next_update_transno =
distribute_txn_get_next_transno(lut->lut_tdtd);
tdtd = lut->lut_tdtd;
/*
* If next_update_transno == 0, it probably because
* updatelog retrieve threads did not get any records
* yet, let's wait those threads stopped
*/
if (next_update_transno == 0) {
spin_unlock(&obd->obd_recovery_task_lock);
while (wait_event_timeout(
tdtd->tdtd_recovery_threads_waitq,
check_update_llog(lut),
cfs_time_seconds(60)) == 0);
spin_lock(&obd->obd_recovery_task_lock);
next_update_transno =
distribute_txn_get_next_transno(tdtd);
}
}
if (next_update_transno != 0 && !obd_recovery_abort(obd)) {
obd->obd_next_recovery_transno = next_update_transno;
spin_unlock(&obd->obd_recovery_task_lock);
/*
* Disconnect unfinished exports from clients, and
* keep connection from MDT to make sure the update
* recovery will still keep trying until some one
* manually abort the recovery
*/
class_disconnect_stale_exports(obd,
exp_finished_or_from_mdt);
/* Abort all of replay & replay lock req from clients */
abort_req_replay_queue(obd);
abort_lock_replay_queue(obd);
CDEBUG(D_HA,
"%s: there are still update replay (%#llx)in the queue.\n",
obd->obd_name, next_update_transno);
} else {
set_bit(OBDF_ABORT_RECOVERY, obd->obd_flags);
spin_unlock(&obd->obd_recovery_task_lock);
CWARN("%s recovery is aborted by hard timeout\n",
obd->obd_name);
}
}
while (wait_event_timeout(obd->obd_next_transno_waitq,
check_routine(lut),
cfs_time_seconds(60)) == 0)
; /* wait indefinitely for event, but don't trigger watchdog */
if (obd_recovery_abort(obd)) {
CWARN("recovery is aborted, evict exports in recovery\n");
if (lut->lut_tdtd != NULL) {
tdtd = lut->lut_tdtd;
/*
* Let's wait all of the update log recovery thread
* finished
*/
wait_event_idle(
tdtd->tdtd_recovery_threads_waitq,
atomic_read(&tdtd->tdtd_recovery_threads_count)
== 0);
/* Then abort the update recovery list */
dtrq_list_destroy(lut->lut_tdtd);
}
/** evict exports which didn't finish recovery yet */
class_disconnect_stale_exports(obd, exp_finished);
return 1;
} else if (obd->obd_recovery_expired) {
obd->obd_recovery_expired = 0;
/** If some clients died being recovered, evict them */
LCONSOLE_WARN("%s: recovery is timed out, evict stale exports\n",
obd->obd_name);
/** evict cexports with no replay in queue, they are stalled */
class_disconnect_stale_exports(obd, health_check);
/** continue with VBR */
spin_lock(&obd->obd_dev_lock);
set_bit(OBDF_VERSION_RECOV, obd->obd_flags);
spin_unlock(&obd->obd_dev_lock);
/**
* reset timer, recovery will proceed with versions now,
* timeout is set just to handle reconnection delays
*/
extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
/**
* Wait for recovery events again, after evicting bad clients
*/
goto repeat;
}
return 0;
}
static struct ptlrpc_request *target_next_replay_lock(struct lu_target *lut)
{
struct obd_device *obd = lut->lut_obd;
struct ptlrpc_request *req = NULL;
CDEBUG(D_HA, "Waiting for lock\n");
if (target_recovery_overseer(lut, check_for_next_lock,
exp_lock_replay_healthy))
abort_lock_replay_queue(obd);
spin_lock(&obd->obd_recovery_task_lock);
if (!list_empty(&obd->obd_lock_replay_queue)) {
req = list_first_entry(&obd->obd_lock_replay_queue,
struct ptlrpc_request, rq_list);
list_del_init(&req->rq_list);
spin_unlock(&obd->obd_recovery_task_lock);
} else {
spin_unlock(&obd->obd_recovery_task_lock);
LASSERT(list_empty(&obd->obd_lock_replay_queue));
LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
/** evict exports failed VBR */
class_disconnect_stale_exports(obd, exp_vbr_healthy);
}
return req;
}
static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
{
struct ptlrpc_request *req = NULL;
spin_lock(&obd->obd_recovery_task_lock);
if (!list_empty(&obd->obd_final_req_queue)) {
req = list_first_entry(&obd->obd_final_req_queue,
struct ptlrpc_request, rq_list);
list_del_init(&req->rq_list);
spin_unlock(&obd->obd_recovery_task_lock);
if (req->rq_export->exp_in_recovery) {
spin_lock(&req->rq_export->exp_lock);
req->rq_export->exp_in_recovery = 0;
spin_unlock(&req->rq_export->exp_lock);
}
} else {
spin_unlock(&obd->obd_recovery_task_lock);
}
return req;
}
static void handle_recovery_req(struct ptlrpc_thread *thread,
struct ptlrpc_request *req,
svc_handler_t handler)
{
ENTRY;
/**
* export can be evicted during recovery, no need to handle replays for
* it after that, discard such request silently
*/
if (req->rq_export->exp_disconnected)
RETURN_EXIT;
req->rq_session.lc_thread = thread;
req->rq_svc_thread = thread;
req->rq_svc_thread->t_env->le_ses = &req->rq_session;
/* thread context */
lu_context_enter(&thread->t_env->le_ctx);
(void)handler(req);
lu_context_exit(&thread->t_env->le_ctx);
req->rq_svc_thread->t_env->le_ses = NULL;
/* don't reset timer for final stage */
if (!exp_finished(req->rq_export)) {
timeout_t timeout = obd_timeout;
struct obd_device *obd = req->rq_export->exp_obd;
/**
* Add request @timeout to the recovery time so next request from
* this client may come in recovery time
*/
if (!obd_at_off(obd))
timeout = ptlrpc_export_prolong_timeout(req, true);
extend_recovery_timer(class_exp2obd(req->rq_export), timeout,
true);
}
EXIT;
}
/** Checking routines for recovery */
static int check_for_recovery_ready(struct lu_target *lut)
{
struct obd_device *obd = lut->lut_obd;
unsigned int clnts = atomic_read(&obd->obd_connected_clients);
CDEBUG(D_HA,
"connected %d stale %d max_recoverable_clients %d abort %d expired %d\n",
clnts, obd->obd_stale_clients,
atomic_read(&obd->obd_max_recoverable_clients),
test_bit(OBDF_ABORT_RECOVERY, obd->obd_flags), obd->obd_recovery_expired);
if (!obd_recovery_abort(obd) && !obd->obd_recovery_expired) {
LASSERT(clnts <=
atomic_read(&obd->obd_max_recoverable_clients));
if (clnts + obd->obd_stale_clients <
atomic_read(&obd->obd_max_recoverable_clients))
return 0;
}
if (!obd_mdt_recovery_abort(obd) && lut->lut_tdtd &&
!lut->lut_tdtd->tdtd_replay_ready) {
/* Let's extend recovery timer, in case the recovery timer
* expired, and some clients got evicted
*/
extend_recovery_timer(obd, obd->obd_recovery_timeout, true);
CDEBUG(D_HA,
"%s update recovery is not ready, extend recovery %d\n",
obd->obd_name, obd->obd_recovery_timeout);
return 0;
}
return 1;
}
enum {
REQUEST_RECOVERY = 1,
UPDATE_RECOVERY = 2,
};
static __u64 get_next_replay_req_transno(struct obd_device *obd)
{
__u64 transno = 0;
if (!list_empty(&obd->obd_req_replay_queue)) {
struct ptlrpc_request *req;
req = list_first_entry(&obd->obd_req_replay_queue,
struct ptlrpc_request, rq_list);
transno = lustre_msg_get_transno(req->rq_reqmsg);
}
return transno;
}
static __u64 get_next_transno(struct lu_target *lut, int *type)
{
struct obd_device *obd = lut->lut_obd;
struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
__u64 transno = 0;
__u64 update_transno;
ENTRY;
transno = get_next_replay_req_transno(obd);
if (type != NULL)
*type = REQUEST_RECOVERY;
if (!tdtd || obd_mdt_recovery_abort(obd))
RETURN(transno);
update_transno = distribute_txn_get_next_transno(tdtd);
if (transno == 0 || (transno >= update_transno &&
update_transno != 0)) {
transno = update_transno;
if (type != NULL)
*type = UPDATE_RECOVERY;
}
RETURN(transno);
}
/**
* drop duplicate replay request
*
* Because the operation has been replayed by update recovery, the request
* with the same transno will be dropped and also notify the client to send
* next replay request.
*
* \param[in] env execution environment
* \param[in] obd failover obd device
* \param[in] req request to be dropped
*
* \retval true duplicate replay update is dropped
* \retval false duplicate replay update is not dropped
*/
static bool drop_duplicate_replay_req(struct lu_env *env,
struct obd_device *obd,
struct ptlrpc_request *req)
{
__u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
DEBUG_REQ(D_HA, req,
"remove t%lld from %s because duplicate update records found",
lustre_msg_get_transno(req->rq_reqmsg),
libcfs_nidstr(&req->rq_peer.nid));
/*
* Right now, only for MDS reint operation update replay and
* normal request replay can have the same transno
*/
if (opc == MDS_REINT) {
req_capsule_set(&req->rq_pill, &RQF_MDS_REINT);
req->rq_status = req_capsule_server_pack(&req->rq_pill);
if (likely(req->rq_export))
target_committed_to_req(req);
lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
target_send_reply(req, req->rq_status, 0);
} else if (opc == MDS_CLOSE) {
DEBUG_REQ(D_HA, req, "duplicate close replay from %s\n",
libcfs_nidstr(&req->rq_peer.nid));
return false;
} else {
DEBUG_REQ(D_ERROR, req, "wrong opc %d from %s\n", opc,
libcfs_nidstr(&req->rq_peer.nid));
}
target_exp_dequeue_req_replay(req);
target_request_copy_put(req);
obd->obd_replayed_requests++;
return true;
}
#define WATCHDOG_TIMEOUT (obd_timeout * 10)
static void replay_request_or_update(struct lu_env *env,
struct lu_target *lut,
struct target_recovery_data *trd,
struct ptlrpc_thread *thread)
{
struct obd_device *obd = lut->lut_obd;
struct ptlrpc_request *req = NULL;
int type;
__u64 transno;
ENTRY;
CDEBUG(D_HA, "Waiting for transno %lld\n",
obd->obd_next_recovery_transno);
/* Replay all of request and update by transno */
do {
struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_DELAY2, cfs_fail_val);
/**
* It is needed to extend recovery window above
* recovery_time_soft. Extending is possible only in the
* end of recovery window (see more details in
* handle_recovery_req()).
*/
CFS_FAIL_TIMEOUT_MS(OBD_FAIL_TGT_REPLAY_DELAY, 300);
if (target_recovery_overseer(lut, check_for_next_transno,
exp_req_replay_healthy_or_from_mdt)) {
abort_req_replay_queue(obd);
abort_lock_replay_queue(obd);
goto abort;
}
spin_lock(&obd->obd_recovery_task_lock);
transno = get_next_transno(lut, &type);
if (type == REQUEST_RECOVERY && transno != 0) {
bool update = false;
/*
* Drop replay request from client side, if the
* replay has been executed by update with the
* same transno
*/
req = list_first_entry(&obd->obd_req_replay_queue,
struct ptlrpc_request, rq_list);
list_del_init(&req->rq_list);
obd->obd_requests_queued_for_recovery--;
spin_unlock(&obd->obd_recovery_task_lock);
/*
* Let's check if the request has been redone by
* update replay
*/
if (is_req_replayed_by_update(req)) {
struct distribute_txn_replay_req *dtrq;
dtrq = distribute_txn_lookup_finish_list(tdtd,
transno);
LASSERT(dtrq != NULL);
spin_lock(&tdtd->tdtd_replay_list_lock);
list_del_init(&dtrq->dtrq_list);
spin_unlock(&tdtd->tdtd_replay_list_lock);
dtrq_destroy(dtrq);
if (drop_duplicate_replay_req(env, obd, req))
continue;
/* not dropped yet */
update = true;
}
LASSERT(trd->trd_processing_task == current->pid);
DEBUG_REQ(D_HA, req, "processing x%llu t%lld from %s",
req->rq_xid,
lustre_msg_get_transno(req->rq_reqmsg),
libcfs_nidstr(&req->rq_peer.nid));
ptlrpc_watchdog_init(&thread->t_watchdog,
WATCHDOG_TIMEOUT);
handle_recovery_req(thread, req,
trd->trd_recovery_handler);
ptlrpc_watchdog_disable(&thread->t_watchdog);
/**
* bz18031: increase next_recovery_transno before
* target_request_copy_put() will drop exp_rpc reference
*/
if (!update) {
spin_lock(&obd->obd_recovery_task_lock);
obd->obd_next_recovery_transno++;
spin_unlock(&obd->obd_recovery_task_lock);
}
target_exp_dequeue_req_replay(req);
target_request_copy_put(req);
obd->obd_replayed_requests++;
} else if (type == UPDATE_RECOVERY && transno != 0) {
struct distribute_txn_replay_req *dtrq;
int rc;
spin_unlock(&obd->obd_recovery_task_lock);
LASSERT(tdtd != NULL);
dtrq = distribute_txn_get_next_req(tdtd);
lu_context_enter(&thread->t_env->le_ctx);
ptlrpc_watchdog_init(&thread->t_watchdog,
WATCHDOG_TIMEOUT);
rc = tdtd->tdtd_replay_handler(env, tdtd, dtrq);
ptlrpc_watchdog_disable(&thread->t_watchdog);
lu_context_exit(&thread->t_env->le_ctx);
extend_recovery_timer(obd, obd_timeout, true);
if (rc == 0 && dtrq->dtrq_xid != 0) {
CDEBUG(D_HA,
"Move x%llu t%llu to finish list\n",
dtrq->dtrq_xid,
dtrq->dtrq_master_transno);
/* Add it to the replay finish list */
spin_lock(&tdtd->tdtd_replay_list_lock);
list_add(&dtrq->dtrq_list,
&tdtd->tdtd_replay_finish_list);
spin_unlock(&tdtd->tdtd_replay_list_lock);
spin_lock(&obd->obd_recovery_task_lock);
if (transno == obd->obd_next_recovery_transno)
obd->obd_next_recovery_transno++;
else if (transno >
obd->obd_next_recovery_transno)
obd->obd_next_recovery_transno =
transno + 1;
spin_unlock(&obd->obd_recovery_task_lock);
} else {
dtrq_destroy(dtrq);
}
} else {
spin_unlock(&obd->obd_recovery_task_lock);
abort:
LASSERT(list_empty(&obd->obd_req_replay_queue));
LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
/** evict exports failed VBR */
class_disconnect_stale_exports(obd, exp_vbr_healthy);
break;
}
} while (1);
}
static int target_recovery_thread(void *arg)
{
struct lu_target *lut = arg;
struct obd_device *obd = lut->lut_obd;
struct ptlrpc_request *req;
struct target_recovery_data *trd = &obd->obd_recovery_data;
unsigned long delta;
struct lu_env *env;
struct ptlrpc_thread *thread = NULL;
int rc = 0;
ENTRY;
unshare_fs_struct();
OBD_ALLOC_PTR(thread);
if (thread == NULL)
RETURN(-ENOMEM);
OBD_ALLOC_PTR(env);
if (env == NULL)
GOTO(out_thread, rc = -ENOMEM);
rc = lu_env_add(env);
if (rc)
GOTO(out_env, rc);
rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
if (rc)
GOTO(out_env_remove, rc);
thread->t_env = env;
thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
thread->t_task = current;
env->le_ctx.lc_thread = thread;
tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
current->pid);
trd->trd_processing_task = current->pid;
spin_lock(&obd->obd_dev_lock);
set_bit(OBDF_RECOVERING, obd->obd_flags);
spin_unlock(&obd->obd_dev_lock);
complete(&trd->trd_starting);
/* first of all, we have to know the first transno to replay */
if (target_recovery_overseer(lut, check_for_recovery_ready,
exp_connect_healthy)) {
abort_req_replay_queue(obd);
abort_lock_replay_queue(obd);
if (lut->lut_tdtd != NULL)
dtrq_list_destroy(lut->lut_tdtd);
}
/* next stage: replay requests or update */
delta = jiffies;
CDEBUG(D_INFO, "1: request replay stage - %d clients from t%llu\n",
atomic_read(&obd->obd_req_replay_clients),
obd->obd_next_recovery_transno);
replay_request_or_update(env, lut, trd, thread);
/**
* The second stage: replay locks
*/
CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
atomic_read(&obd->obd_lock_replay_clients));
CFS_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_FAIL_REPLAY, 10);
while ((req = target_next_replay_lock(lut))) {
LASSERT(trd->trd_processing_task == current->pid);
DEBUG_REQ(D_HA, req, "processing lock from %s:",
libcfs_nidstr(&req->rq_peer.nid));
if (CFS_FAIL_CHECK(OBD_FAIL_LDLM_LOCK_REPLAY)) {
req->rq_status = -ENODEV;
target_request_copy_put(req);
continue;
}
handle_recovery_req(thread, req,
trd->trd_recovery_handler);
target_request_copy_put(req);
obd->obd_replayed_locks++;
}
/**
* The third stage: reply on final pings, at this moment all clients
* must have request in final queue
*/
CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_RECONNECT, cfs_fail_val);
CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
/** Update server last boot epoch */
tgt_boot_epoch_update(lut);
/* cancel update llogs upon recovery abort */
if (test_bit(OBDF_ABORT_RECOVERY, obd->obd_flags) ||
test_bit(OBDF_ABORT_MDT_RECOVERY, obd->obd_flags))
obd->obd_type->typ_dt_ops->o_iocontrol(OBD_IOC_LLOG_CANCEL,
obd->obd_self_export,
0, trd, NULL);
list_for_each_entry(req, &obd->obd_final_req_queue, rq_list) {
/*
* Because the waiting client can not send ping to server,
* so we need refresh the last_request_time, to avoid the
* export is being evicted
*/
ptlrpc_update_export_timer(req);
}
/*
* We drop recoverying flag to forward all new requests
* to regular mds_handle() since now
*/
spin_lock(&obd->obd_dev_lock);
clear_bit(OBDF_RECOVERING, obd->obd_flags);
clear_bit(OBDF_ABORT_RECOVERY, obd->obd_flags);
clear_bit(OBDF_ABORT_MDT_RECOVERY, obd->obd_flags);
spin_unlock(&obd->obd_dev_lock);
spin_lock(&obd->obd_recovery_task_lock);
target_cancel_recovery_timer(obd);
spin_unlock(&obd->obd_recovery_task_lock);
while ((req = target_next_final_ping(obd))) {
LASSERT(trd->trd_processing_task == current->pid);
DEBUG_REQ(D_HA, req, "processing final ping from %s:",
libcfs_nidstr(&req->rq_peer.nid));
handle_recovery_req(thread, req,
trd->trd_recovery_handler);
target_request_copy_put(req);
}
delta = jiffies_to_msecs(jiffies - delta) / MSEC_PER_SEC;
CDEBUG(D_INFO, "4: recovery completed in %lus - %d/%d reqs/locks\n",
delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
if (delta > OBD_RECOVERY_TIME_SOFT) {
CWARN("too long recovery - read logs\n");
libcfs_debug_dumplog();
}
target_finish_recovery(lut);
lu_context_fini(&env->le_ctx);
trd->trd_processing_task = 0;
complete_all(&trd->trd_finishing);
tgt_io_thread_done(thread);
out_env_remove:
lu_env_remove(env);
out_env:
OBD_FREE_PTR(env);
out_thread:
OBD_FREE_PTR(thread);
RETURN(rc);
}
static int target_start_recovery_thread(struct lu_target *lut,
svc_handler_t handler)
{
struct obd_device *obd = lut->lut_obd;
int rc = 0;
struct target_recovery_data *trd = &obd->obd_recovery_data;
int index;
memset(trd, 0, sizeof(*trd));
init_completion(&trd->trd_starting);
init_completion(&trd->trd_finishing);
trd->trd_recovery_handler = handler;
rc = server_name2index(obd->obd_name, &index, NULL);
if (rc < 0)
return rc;
if (!IS_ERR(kthread_run(target_recovery_thread,
lut, "tgt_recover_%d", index))) {
wait_for_completion(&trd->trd_starting);
LASSERT(test_bit(OBDF_RECOVERING, obd->obd_flags));
} else {
rc = -ECHILD;
}
return rc;
}
void target_stop_recovery_thread(struct obd_device *obd)
{
if (obd->obd_recovery_data.trd_processing_task > 0) {
struct target_recovery_data *trd = &obd->obd_recovery_data;
/** recovery can be done but postrecovery is not yet */
spin_lock(&obd->obd_dev_lock);
if (test_bit(OBDF_RECOVERING, obd->obd_flags)) {
CERROR("%s: Aborting recovery\n", obd->obd_name);
set_bit(OBDF_ABORT_RECOVERY, obd->obd_flags);
wake_up(&obd->obd_next_transno_waitq);
}
spin_unlock(&obd->obd_dev_lock);
wait_for_completion(&trd->trd_finishing);
}
}
EXPORT_SYMBOL(target_stop_recovery_thread);
void target_recovery_fini(struct obd_device *obd)
{
class_disconnect_exports(obd);
target_stop_recovery_thread(obd);
target_cleanup_recovery(obd);
}
EXPORT_SYMBOL(target_recovery_fini);
static enum hrtimer_restart target_recovery_expired(struct hrtimer *timer)
{
struct obd_device *obd = container_of(timer, struct obd_device,
obd_recovery_timer);
CDEBUG(D_HA,
"%s: recovery timed out; %d clients are still in recovery after %llu seconds (%d clients connected)\n",
obd->obd_name, atomic_read(&obd->obd_lock_replay_clients),
ktime_get_seconds() - obd->obd_recovery_start,
atomic_read(&obd->obd_connected_clients));
obd->obd_recovery_expired = 1;
wake_up(&obd->obd_next_transno_waitq);
return HRTIMER_NORESTART;
}
void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
{
struct obd_device *obd = lut->lut_obd;
if (lut->lut_bottom->dd_rdonly)
return;
if (atomic_read(&obd->obd_max_recoverable_clients) == 0) {
/** Update server last boot epoch */
tgt_boot_epoch_update(lut);
return;
}
CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, last_transno %llu\n",
obd->obd_name,
atomic_read(&obd->obd_max_recoverable_clients),
obd->obd_last_committed);
LASSERT(!test_bit(OBDF_STOPPING, obd->obd_flags));
obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
obd->obd_recovery_start = 0;
obd->obd_recovery_end = 0;
hrtimer_setup(&obd->obd_recovery_timer, target_recovery_expired,
CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
target_start_recovery_thread(lut, handler);
}
EXPORT_SYMBOL(target_recovery_init);
static int target_process_req_flags(struct obd_device *obd,
struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
LASSERT(exp != NULL);
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
/* client declares he's ready to replay locks */
spin_lock(&exp->exp_lock);
if (exp->exp_req_replay_needed) {
exp->exp_req_replay_needed = 0;
spin_unlock(&exp->exp_lock);
LASSERT(atomic_read(&(obd)->obd_req_replay_clients) >
0);
atomic_dec(&obd->obd_req_replay_clients);
} else {
spin_unlock(&exp->exp_lock);
}
}
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
/*
* client declares he's ready to complete recovery
* so, we put the request on th final queue
*/
spin_lock(&exp->exp_lock);
if (exp->exp_lock_replay_needed) {
exp->exp_lock_replay_needed = 0;
spin_unlock(&exp->exp_lock);
LASSERT(atomic_read(&(obd)->obd_lock_replay_clients) >
0);
atomic_dec(&obd->obd_lock_replay_clients);
} else {
spin_unlock(&exp->exp_lock);
}
}
return 0;
}
int target_queue_recovery_request(struct ptlrpc_request *req,
struct obd_device *obd)
{
__u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
struct ptlrpc_request *reqiter;
int inserted = 0;
ENTRY;
if (obd->obd_recovery_data.trd_processing_task == current->pid) {
/* Processing the queue right now, don't re-add. */
RETURN(1);
}
target_process_req_flags(obd, req);
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
if (unlikely(CFS_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
if (cfs_fail_val == 1) {
cfs_race_state = 1;
cfs_fail_val = 0;
wake_up(&cfs_race_waitq);
schedule_timeout_interruptible(
cfs_time_seconds(1));
}
}
/*
* client declares he's ready to complete recovery
* so, we put the request on th final queue
*/
target_request_copy_get(req);
DEBUG_REQ(D_HA, req, "queue final req");
wake_up(&obd->obd_next_transno_waitq);
spin_lock(&obd->obd_recovery_task_lock);
if (test_bit(OBDF_RECOVERING, obd->obd_flags)) {
struct ptlrpc_request *tmp;
struct ptlrpc_request *duplicate = NULL;
if (likely(!req->rq_export->exp_replay_done)) {
req->rq_export->exp_replay_done = 1;
list_add_tail(&req->rq_list,
&obd->obd_final_req_queue);
spin_unlock(&obd->obd_recovery_task_lock);
RETURN(0);
}
/*
* XXX O(n), but only happens if final ping is
* timed out, probably reorganize the list as
* a hash list later
*/
list_for_each_entry_safe(reqiter, tmp,
&obd->obd_final_req_queue,
rq_list) {
if (reqiter->rq_export == req->rq_export) {
list_del_init(&reqiter->rq_list);
duplicate = reqiter;
break;
}
}
list_add_tail(&req->rq_list,
&obd->obd_final_req_queue);
req->rq_export->exp_replay_done = 1;
spin_unlock(&obd->obd_recovery_task_lock);
if (duplicate != NULL) {
DEBUG_REQ(D_HA, duplicate,
"put prev final req");
target_request_copy_put(duplicate);
}
RETURN(0);
} else {
spin_unlock(&obd->obd_recovery_task_lock);
target_request_copy_put(req);
RETURN(test_bit(OBDF_STOPPING, obd->obd_flags) ? -ENOTCONN : 1);
}
}
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
/* client declares he's ready to replay locks */
target_request_copy_get(req);
DEBUG_REQ(D_HA, req, "queue lock replay req");
wake_up(&obd->obd_next_transno_waitq);
spin_lock(&obd->obd_recovery_task_lock);
LASSERT(test_bit(OBDF_RECOVERING, obd->obd_flags));
/* usually due to recovery abort */
if (!req->rq_export->exp_in_recovery) {
spin_unlock(&obd->obd_recovery_task_lock);
target_request_copy_put(req);
RETURN(-ENOTCONN);
}
LASSERT(req->rq_export->exp_lock_replay_needed);
list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
spin_unlock(&obd->obd_recovery_task_lock);
RETURN(0);
}
/*
* CAVEAT EMPTOR: The incoming request message has been swabbed
* (i.e. buflens etc are in my own byte order), but type-dependent
* buffers (eg mdt_body, ost_body etc) have NOT been swabbed.
*/
if (!transno) {
INIT_LIST_HEAD(&req->rq_list);
DEBUG_REQ(D_HA, req, "not queueing");
RETURN(1);
}
/*
* If we're processing the queue, we want don't want to queue this
* message.
*
* Also, if this request has a transno less than the one we're waiting
* for, we should process it now. It could (and currently always will)
* be an open request for a descriptor that was opened some time ago.
*
* Also, a resent, replayed request that has already been
* handled will pass through here and be processed immediately.
*/
CDEBUG(D_HA,
"Next recovery transno: %llu, current: %llu, replaying\n",
obd->obd_next_recovery_transno, transno);
/*
* If the request has been replayed by update replay, then sends this
* request to the recovery thread (replay_request_or_update()), where
* it will be handled
*/
spin_lock(&obd->obd_recovery_task_lock);
if (transno < obd->obd_next_recovery_transno &&
!is_req_replayed_by_update(req)) {
/* Processing the queue right now, don't re-add. */
LASSERT(list_empty(&req->rq_list));
spin_unlock(&obd->obd_recovery_task_lock);
RETURN(1);
}
spin_unlock(&obd->obd_recovery_task_lock);
if (CFS_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
RETURN(0);
target_request_copy_get(req);
if (!req->rq_export->exp_in_recovery) {
target_request_copy_put(req);
RETURN(-ENOTCONN);
}
LASSERT(req->rq_export->exp_req_replay_needed);
if (target_exp_enqueue_req_replay(req)) {
DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
target_request_copy_put(req);
RETURN(0);
}
/* XXX O(n^2) */
spin_lock(&obd->obd_recovery_task_lock);
LASSERT(test_bit(OBDF_RECOVERING, obd->obd_flags));
list_for_each_entry(reqiter, &obd->obd_req_replay_queue, rq_list) {
if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
list_add_tail(&req->rq_list, &reqiter->rq_list);
inserted = 1;
goto added;
}
if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
transno)) {
DEBUG_REQ(D_ERROR, req,
"dropping replay: transno has been claimed by another client");
spin_unlock(&obd->obd_recovery_task_lock);
target_exp_dequeue_req_replay(req);
target_request_copy_put(req);
RETURN(0);
}
}
added:
if (!inserted)
list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
obd->obd_requests_queued_for_recovery++;
spin_unlock(&obd->obd_recovery_task_lock);
wake_up(&obd->obd_next_transno_waitq);
RETURN(0);
}
void target_committed_to_req(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
lustre_msg_set_last_committed(req->rq_repmsg,
exp->exp_last_committed);
else
DEBUG_REQ(D_IOCTL, req,
"not sending last_committed update (%d/%d)",
exp->exp_obd->obd_no_transno,
req->rq_repmsg == NULL);
CDEBUG(D_INFO, "last_committed %llu, transno %llu, xid %llu\n",
exp->exp_last_committed, req->rq_transno, req->rq_xid);
}
#endif /* CONFIG_LUSTRE_FS_SERVER */
/**
* Packs current SLV and Limit into \a req.
*/
int target_pack_pool_reply(struct ptlrpc_request *req)
{
struct obd_device *obd;
ENTRY;
/*
* Check that we still have all structures alive as this may
* be some late RPC at shutdown time.
*/
if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
!exp_connect_lru_resize(req->rq_export))) {
lustre_msg_set_slv(req->rq_repmsg, 0);
lustre_msg_set_limit(req->rq_repmsg, 0);
RETURN(0);
}
/* OBD is alive here as export is alive, which we checked above. */
obd = req->rq_export->exp_obd;
read_lock(&obd->obd_pool_lock);
lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
read_unlock(&obd->obd_pool_lock);
RETURN(0);
}
static int target_send_reply_msg(struct ptlrpc_request *req,
int rc, int fail_id)
{
if (CFS_FAIL_CHECK_ORSET(fail_id & ~CFS_FAIL_ONCE, CFS_FAIL_ONCE)) {
DEBUG_REQ(D_ERROR, req, "dropping reply");
return -ECOMM;
}
/*
* We can have a null rq_reqmsg in the event of bad signature or
* no context when unwrapping
*/
if (req->rq_reqmsg &&
unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
CFS_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET_REP)))
return -ECOMM;
if (unlikely(rc)) {
DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
req->rq_status = rc;
return ptlrpc_send_error(req, 1);
}
DEBUG_REQ(D_NET, req, "sending reply");
return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
}
void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
{
struct ptlrpc_service_part *svcpt;
int netrc;
struct ptlrpc_reply_state *rs;
struct obd_export *exp;
ENTRY;
if (req->rq_no_reply) {
EXIT;
return;
}
svcpt = req->rq_rqbd->rqbd_svcpt;
rs = req->rq_reply_state;
if (rs == NULL || !rs->rs_difficult) {
/* no notifiers */
target_send_reply_msg(req, rc, fail_id);
EXIT;
return;
}
/* must be an export if locks saved */
LASSERT(req->rq_export != NULL);
/* req/reply consistent */
LASSERT(rs->rs_svcpt == svcpt);
/* "fresh" reply */
LASSERT(!rs->rs_scheduled);
LASSERT(!rs->rs_scheduled_ever);
LASSERT(!rs->rs_handled);
LASSERT(!rs->rs_sent);
LASSERT(!rs->rs_unlinked);
LASSERT(rs->rs_export == NULL);
LASSERT(list_empty(&rs->rs_obd_list));
LASSERT(list_empty(&rs->rs_exp_list));
exp = class_export_get(req->rq_export);
/* disable reply scheduling while I'm setting up */
rs->rs_scheduled = 1;
rs->rs_sent = 0;
rs->rs_unlinked = 0;
rs->rs_xid = req->rq_xid;
rs->rs_transno = req->rq_transno;
rs->rs_export = exp;
rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
spin_lock(&exp->exp_uncommitted_replies_lock);
CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
rs->rs_transno, exp->exp_last_committed);
if (rs->rs_transno > exp->exp_last_committed) {
/* not committed already */
list_add_tail(&rs->rs_obd_list,
&exp->exp_uncommitted_replies);
}
spin_unlock(&exp->exp_uncommitted_replies_lock);
spin_lock(&exp->exp_lock);
list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
spin_unlock(&exp->exp_lock);
netrc = target_send_reply_msg(req, rc, fail_id);
spin_lock(&svcpt->scp_rep_lock);
atomic_inc(&svcpt->scp_nreps_difficult);
if (netrc != 0) {
/*
* error sending: reply is off the net. Also we need +1
* reply ref until ptlrpc_handle_rs() is done
* with the reply state (if the send was successful, there
* would have been +1 ref for the net, which
* reply_out_callback leaves alone)
*/
rs->rs_sent = 1;
rs->rs_unlinked = 1;
kref_get(&rs->rs_refcount);
}
spin_lock(&rs->rs_lock);
if (rs->rs_transno <= exp->exp_last_committed ||
(rs->rs_unlinked && !rs->rs_no_ack) ||
list_empty(&rs->rs_exp_list) || /* completed already */
list_empty(&rs->rs_obd_list)) {
CDEBUG(D_HA, "Schedule reply immediately\n");
ptlrpc_dispatch_difficult_reply(rs);
} else {
list_add(&rs->rs_list, &svcpt->scp_rep_active);
rs->rs_scheduled = 0; /* allow notifier to schedule */
}
spin_unlock(&rs->rs_lock);
spin_unlock(&svcpt->scp_rep_lock);
EXIT;
}
enum ldlm_mode lck_compat_array[] = {
[LCK_EX] = LCK_COMPAT_EX,
[LCK_PW] = LCK_COMPAT_PW,
[LCK_PR] = LCK_COMPAT_PR,
[LCK_CW] = LCK_COMPAT_CW,
[LCK_CR] = LCK_COMPAT_CR,
[LCK_NL] = LCK_COMPAT_NL,
[LCK_GROUP] = LCK_COMPAT_GROUP,
[LCK_COS] = LCK_COMPAT_COS,
[LCK_TXN] = LCK_COMPAT_TXN,
};
/**
* Rather arbitrary mapping from LDLM error codes to errno values. This should
* not escape to the user level.
*/
int ldlm_error2errno(enum ldlm_error error)
{
int result;
switch (error) {
case ELDLM_OK:
case ELDLM_LOCK_MATCHED:
result = 0;
break;
case ELDLM_LOCK_CHANGED:
result = -ESTALE;
break;
case ELDLM_LOCK_ABORTED:
result = -ENAVAIL;
break;
case ELDLM_LOCK_REPLACED:
result = -ESRCH;
break;
case ELDLM_NO_LOCK_DATA:
result = -ENOENT;
break;
case ELDLM_NAMESPACE_EXISTS:
result = -EEXIST;
break;
case ELDLM_BAD_NAMESPACE:
result = -EBADF;
break;
default:
if (((int)error) < 0) { /* cast to signed type */
result = error; /* as ldlm_error can be unsigned */
} else {
CERROR("Invalid DLM result code: %d\n", error);
result = -EPROTO;
}
}
return result;
}
EXPORT_SYMBOL(ldlm_error2errno);
#if LUSTRE_TRACKS_LOCK_EXP_REFS
void ldlm_dump_export_locks(struct obd_export *exp)
{
spin_lock(&exp->exp_locks_list_guard);
if (!list_empty(&exp->exp_locks_list)) {
struct ldlm_lock *lock;
CERROR("dumping locks for export %p, ignore if the unmount doesn't hang\n",
exp);
list_for_each_entry(lock, &exp->exp_locks_list,
l_exp_refs_link)
LDLM_ERROR(lock, "lock:");
}
spin_unlock(&exp->exp_locks_list_guard);
}
#endif
#ifdef CONFIG_LUSTRE_FS_SERVER
static inline const char *bulk2type(struct ptlrpc_request *req)
{
if (req->rq_bulk_read)
return "READ";
if (req->rq_bulk_write)
return "WRITE";
return "UNKNOWN";
}
int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc)
{
struct ptlrpc_request *req = desc->bd_req;
time64_t start = ktime_get_seconds();
time64_t deadline;
int rc = 0;
ENTRY;
/* Check if client was evicted or reconnected already. */
if (exp->exp_failed ||
exp->exp_conn_cnt > lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
rc = -ENOTCONN;
} else {
if (req->rq_bulk_read)
rc = sptlrpc_svc_wrap_bulk(req, desc);
if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
else /* old version, bulk matchbits is rq_xid */
req->rq_mbits = req->rq_xid;
if (rc == 0)
rc = ptlrpc_start_bulk_transfer(desc);
}
if (rc < 0) {
DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc = %d",
bulk2type(req), rc);
RETURN(rc);
}
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
ptlrpc_abort_bulk(desc);
RETURN(0);
}
/* limit actual bulk transfer to bulk_timeout seconds */
deadline = start + bulk_timeout;
if (deadline > req->rq_deadline)
deadline = req->rq_deadline;
do {
time64_t timeoutl = deadline - ktime_get_seconds();
time64_t rq_deadline;
while (timeoutl >= 0 &&
wait_event_idle_timeout(
desc->bd_waitq,
!ptlrpc_server_bulk_active(desc) ||
exp->exp_failed ||
exp->exp_conn_cnt >
lustre_msg_get_conn_cnt(req->rq_reqmsg),
timeoutl ? cfs_time_seconds(1) : 1) == 0)
timeoutl -= 1;
rc = timeoutl < 0 ? -ETIMEDOUT : 0;
/* Wait again if we changed rq_deadline. */
rq_deadline = READ_ONCE(req->rq_deadline);
deadline = start + bulk_timeout;
if (deadline > rq_deadline)
deadline = rq_deadline;
} while (rc == -ETIMEDOUT &&
deadline > ktime_get_seconds());
if (rc == -ETIMEDOUT) {
DEBUG_REQ(D_ERROR, req, "timeout on bulk %s after %lld%+llds",
bulk2type(req), deadline - start,
ktime_get_real_seconds() - deadline);
ptlrpc_abort_bulk(desc);
} else if (exp->exp_failed) {
DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
bulk2type(req));
rc = -ENOTCONN;
ptlrpc_abort_bulk(desc);
} else if (exp->exp_conn_cnt >
lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
bulk2type(req));
/* We don't reply anyway. */
rc = -ETIMEDOUT;
ptlrpc_abort_bulk(desc);
} else if (desc->bd_failure) {
DEBUG_REQ(D_ERROR, req, "network error on bulk %s",
bulk2type(req));
/* XXX should this be a different errno? */
rc = -ETIMEDOUT;
} else {
if (req->rq_bulk_write)
rc = sptlrpc_svc_unwrap_bulk(req, desc);
if (rc == 0 && desc->bd_nob_transferred != desc->bd_nob) {
DEBUG_REQ(D_ERROR, req, "truncated bulk %s %d(%d)",
bulk2type(req), desc->bd_nob_transferred,
desc->bd_nob);
/* XXX should this be a different errno? */
rc = -ETIMEDOUT;
}
}
RETURN(rc);
}
EXPORT_SYMBOL(target_bulk_io);
#endif /* CONFIG_LUSTRE_FS_SERVER */
