-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2016, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_RPC
-#ifdef __KERNEL__
-# include <libcfs/libcfs.h>
-#else
-# include <liblustre.h>
-#endif
-
+#include <linux/list.h>
+#include <libcfs/libcfs.h>
#include <obd_support.h>
#include <lustre_ha.h>
#include <lustre_net.h>
#include <lustre_import.h>
#include <lustre_export.h>
#include <obd.h>
-#include <obd_ost.h>
#include <obd_class.h>
-#include <obd_lov.h> /* for IOC_LOV_SET_OSC_ACTIVE */
-#include <libcfs/list.h>
#include "ptlrpc_internal.h"
-static int ptlrpc_recover_import_no_retry(struct obd_import *, char *);
-
+/**
+ * Start recovery on disconnected import.
+ * This is done by just attempting a connect
+ */
void ptlrpc_initiate_recovery(struct obd_import *imp)
{
ENTRY;
CDEBUG(D_HA, "%s: starting recovery\n", obd2cli_tgt(imp->imp_obd));
- ptlrpc_connect_import(imp, NULL);
+ ptlrpc_connect_import(imp);
EXIT;
}
+/**
+ * Identify what request from replay list needs to be replayed next
+ * (based on what we have already replayed) and send it to server.
+ */
int ptlrpc_replay_next(struct obd_import *imp, int *inflight)
{
int rc = 0;
- struct list_head *tmp, *pos;
+ struct list_head *tmp, *pos;
struct ptlrpc_request *req = NULL;
__u64 last_transno;
ENTRY;
/* It might have committed some after we last spoke, so make sure we
* get rid of them now.
*/
- spin_lock(&imp->imp_lock);
- imp->imp_last_transno_checked = 0;
- ptlrpc_free_committed(imp);
- last_transno = imp->imp_last_replay_transno;
- spin_unlock(&imp->imp_lock);
-
- CDEBUG(D_HA, "import %p from %s committed "LPU64" last "LPU64"\n",
- imp, obd2cli_tgt(imp->imp_obd),
- imp->imp_peer_committed_transno, last_transno);
-
- /* Do I need to hold a lock across this iteration? We shouldn't be
- * racing with any additions to the list, because we're in recovery
- * and are therefore not processing additional requests to add. Calls
- * to ptlrpc_free_committed might commit requests, but nothing "newer"
- * than the one we're replaying (it can't be committed until it's
- * replayed, and we're doing that here). l_f_e_safe protects against
- * problems with the current request being committed, in the unlikely
- * event of that race. So, in conclusion, I think that it's safe to
- * perform this list-walk without the imp_lock held.
- *
- * But, the {mdc,osc}_replay_open callbacks both iterate
- * request lists, and have comments saying they assume the
- * imp_lock is being held by ptlrpc_replay, but it's not. it's
- * just a little race...
- */
- list_for_each_safe(tmp, pos, &imp->imp_replay_list) {
- req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
-
- /* If need to resend the last sent transno (because a
- reconnect has occurred), then stop on the matching
- req and send it again. If, however, the last sent
- transno has been committed then we continue replay
- from the next request. */
- if (imp->imp_resend_replay &&
- req->rq_transno == last_transno) {
- lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
- break;
- }
-
- if (req->rq_transno > last_transno) {
- imp->imp_last_replay_transno = req->rq_transno;
- break;
- }
-
- req = NULL;
- }
-
- spin_lock(&imp->imp_lock);
- imp->imp_resend_replay = 0;
- spin_unlock(&imp->imp_lock);
-
- if (req != NULL) {
- rc = ptlrpc_replay_req(req);
- if (rc) {
- CERROR("recovery replay error %d for req "
- LPD64"\n", rc, req->rq_xid);
- RETURN(rc);
- }
- *inflight = 1;
- }
- RETURN(rc);
+ spin_lock(&imp->imp_lock);
+ imp->imp_last_transno_checked = 0;
+ ptlrpc_free_committed(imp);
+ last_transno = imp->imp_last_replay_transno;
+
+ CDEBUG(D_HA, "import %p from %s committed %llu last %llu\n",
+ imp, obd2cli_tgt(imp->imp_obd),
+ imp->imp_peer_committed_transno, last_transno);
+
+ /* Replay all the committed open requests on committed_list first */
+ if (!list_empty(&imp->imp_committed_list)) {
+ tmp = imp->imp_committed_list.prev;
+ req = list_entry(tmp, struct ptlrpc_request,
+ rq_replay_list);
+
+ /* The last request on committed_list hasn't been replayed */
+ if (req->rq_transno > last_transno) {
+ if (!imp->imp_resend_replay ||
+ imp->imp_replay_cursor == &imp->imp_committed_list)
+ imp->imp_replay_cursor =
+ imp->imp_replay_cursor->next;
+
+ while (imp->imp_replay_cursor !=
+ &imp->imp_committed_list) {
+ req = list_entry(imp->imp_replay_cursor,
+ struct ptlrpc_request,
+ rq_replay_list);
+ if (req->rq_transno > last_transno)
+ break;
+
+ req = NULL;
+ LASSERT(!list_empty(imp->imp_replay_cursor));
+ imp->imp_replay_cursor =
+ imp->imp_replay_cursor->next;
+ }
+ } else {
+ /* All requests on committed_list have been replayed */
+ imp->imp_replay_cursor = &imp->imp_committed_list;
+ req = NULL;
+ }
+ }
+
+ /* All the requests in committed list have been replayed, let's replay
+ * the imp_replay_list */
+ if (req == NULL) {
+ list_for_each_safe(tmp, pos, &imp->imp_replay_list) {
+ req = list_entry(tmp, struct ptlrpc_request,
+ rq_replay_list);
+
+ if (req->rq_transno > last_transno)
+ break;
+ req = NULL;
+ }
+ }
+
+ /* If need to resend the last sent transno (because a reconnect
+ * has occurred), then stop on the matching req and send it again.
+ * If, however, the last sent transno has been committed then we
+ * continue replay from the next request. */
+ if (req != NULL && imp->imp_resend_replay)
+ lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
+
+ /* ptlrpc_prepare_replay() may fail to add the reqeust into unreplied
+ * list if the request hasn't been added to replay list then. Another
+ * exception is that resend replay could have been removed from the
+ * unreplied list. */
+ if (req != NULL && list_empty(&req->rq_unreplied_list)) {
+ DEBUG_REQ(D_HA, req, "resend_replay: %d, last_transno: %llu\n",
+ imp->imp_resend_replay, last_transno);
+ ptlrpc_add_unreplied(req);
+ imp->imp_known_replied_xid = ptlrpc_known_replied_xid(imp);
+ }
+
+ imp->imp_resend_replay = 0;
+ spin_unlock(&imp->imp_lock);
+
+ if (req != NULL) {
+ LASSERT(!list_empty(&req->rq_unreplied_list));
+
+ rc = ptlrpc_replay_req(req);
+ if (rc) {
+ CERROR("recovery replay error %d for req "
+ "%llu\n", rc, req->rq_xid);
+ RETURN(rc);
+ }
+ *inflight = 1;
+ }
+ RETURN(rc);
}
+/**
+ * Schedule resending of request on sending_list. This is done after
+ * we completed replaying of requests and locks.
+ */
int ptlrpc_resend(struct obd_import *imp)
{
struct ptlrpc_request *req, *next;
*/
/* Well... what if lctl recover is called twice at the same time?
*/
- spin_lock(&imp->imp_lock);
- if (imp->imp_state != LUSTRE_IMP_RECOVER) {
- spin_unlock(&imp->imp_lock);
+ spin_lock(&imp->imp_lock);
+ if (imp->imp_state != LUSTRE_IMP_RECOVER) {
+ spin_unlock(&imp->imp_lock);
RETURN(-1);
}
- list_for_each_entry_safe(req, next, &imp->imp_sending_list, rq_list) {
- LASSERTF((long)req > CFS_PAGE_SIZE && req != LP_POISON,
- "req %p bad\n", req);
- LASSERTF(req->rq_type != LI_POISON, "req %p freed\n", req);
- if (!req->rq_no_resend)
- ptlrpc_resend_req(req);
- }
- spin_unlock(&imp->imp_lock);
-
- RETURN(0);
+ list_for_each_entry_safe(req, next, &imp->imp_sending_list, rq_list) {
+ LASSERTF((long)req > PAGE_SIZE && req != LP_POISON,
+ "req %p bad\n", req);
+ LASSERTF(req->rq_type != LI_POISON, "req %p freed\n", req);
+
+ /* If the request is allowed to be sent during replay and it
+ * is not timeout yet, then it does not need to be resent. */
+ if (!ptlrpc_no_resend(req) &&
+ (req->rq_timedout || !req->rq_allow_replay))
+ ptlrpc_resend_req(req);
+ }
+ spin_unlock(&imp->imp_lock);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT, 2);
+ RETURN(0);
}
+/**
+ * Go through all requests in delayed list and wake their threads
+ * for resending
+ */
void ptlrpc_wake_delayed(struct obd_import *imp)
{
- struct list_head *tmp, *pos;
- struct ptlrpc_request *req;
+ struct list_head *tmp, *pos;
+ struct ptlrpc_request *req;
- spin_lock(&imp->imp_lock);
- list_for_each_safe(tmp, pos, &imp->imp_delayed_list) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
+ spin_lock(&imp->imp_lock);
+ list_for_each_safe(tmp, pos, &imp->imp_delayed_list) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_list);
- DEBUG_REQ(D_HA, req, "waking (set %p):", req->rq_set);
- ptlrpc_client_wake_req(req);
- }
- spin_unlock(&imp->imp_lock);
+ DEBUG_REQ(D_HA, req, "waking (set %p):", req->rq_set);
+ ptlrpc_client_wake_req(req);
+ }
+ spin_unlock(&imp->imp_lock);
}
void ptlrpc_request_handle_notconn(struct ptlrpc_request *failed_req)
}
/* to control recovery via lctl {disable|enable}_recovery */
if (imp->imp_deactive == 0)
- ptlrpc_connect_import(imp, NULL);
+ ptlrpc_connect_import(imp);
}
/* Wait for recovery to complete and resend. If evicted, then
this request will be errored out later.*/
- spin_lock(&failed_req->rq_lock);
- if (!failed_req->rq_no_resend)
- failed_req->rq_resend = 1;
- spin_unlock(&failed_req->rq_lock);
+ spin_lock(&failed_req->rq_lock);
+ if (!failed_req->rq_no_resend)
+ failed_req->rq_resend = 1;
+ spin_unlock(&failed_req->rq_lock);
- EXIT;
+ EXIT;
}
-/*
+/**
* Administratively active/deactive a client.
* This should only be called by the ioctl interface, currently
* - the lctl deactivate and activate commands
/* set before invalidate to avoid messages about imp_inval
* set without imp_deactive in ptlrpc_import_delay_req */
- spin_lock(&imp->imp_lock);
- imp->imp_deactive = 1;
- spin_unlock(&imp->imp_lock);
+ spin_lock(&imp->imp_lock);
+ imp->imp_deactive = 1;
+ spin_unlock(&imp->imp_lock);
+
+ obd_import_event(imp->imp_obd, imp, IMP_EVENT_DEACTIVATE);
ptlrpc_invalidate_import(imp);
}
if (active) {
CDEBUG(D_HA, "setting import %s VALID\n",
obd2cli_tgt(imp->imp_obd));
- rc = ptlrpc_recover_import(imp, NULL);
+
+ spin_lock(&imp->imp_lock);
+ imp->imp_deactive = 0;
+ spin_unlock(&imp->imp_lock);
+ obd_import_event(imp->imp_obd, imp, IMP_EVENT_ACTIVATE);
+
+ rc = ptlrpc_recover_import(imp, NULL, 0);
}
RETURN(rc);
}
+EXPORT_SYMBOL(ptlrpc_set_import_active);
/* Attempt to reconnect an import */
-int ptlrpc_recover_import(struct obd_import *imp, char *new_uuid)
+int ptlrpc_recover_import(struct obd_import *imp, char *new_uuid, int async)
{
- int rc;
- ENTRY;
-
- spin_lock(&imp->imp_lock);
- if (atomic_read(&imp->imp_inval_count)) {
- spin_unlock(&imp->imp_lock);
- RETURN(-EINVAL);
- }
- spin_unlock(&imp->imp_lock);
+ int rc = 0;
+ ENTRY;
+
+ spin_lock(&imp->imp_lock);
+ if (imp->imp_state == LUSTRE_IMP_NEW || imp->imp_deactive ||
+ atomic_read(&imp->imp_inval_count))
+ rc = -EINVAL;
+ spin_unlock(&imp->imp_lock);
+ if (rc)
+ GOTO(out, rc);
/* force import to be disconnected. */
ptlrpc_set_import_discon(imp, 0);
- spin_lock(&imp->imp_lock);
- imp->imp_deactive = 0;
- spin_unlock(&imp->imp_lock);
+ if (new_uuid) {
+ struct obd_uuid uuid;
- rc = ptlrpc_recover_import_no_retry(imp, new_uuid);
+ /* intruct import to use new uuid */
+ obd_str2uuid(&uuid, new_uuid);
+ rc = import_set_conn_priority(imp, &uuid);
+ if (rc)
+ GOTO(out, rc);
+ }
- RETURN(rc);
-}
+ /* Check if reconnect is already in progress */
+ spin_lock(&imp->imp_lock);
+ if (imp->imp_state != LUSTRE_IMP_DISCON) {
+ imp->imp_force_verify = 1;
+ rc = -EALREADY;
+ }
+ spin_unlock(&imp->imp_lock);
+ if (rc)
+ GOTO(out, rc);
-int ptlrpc_import_in_recovery(struct obd_import *imp)
-{
- int in_recovery = 1;
- spin_lock(&imp->imp_lock);
- if (imp->imp_state == LUSTRE_IMP_FULL ||
- imp->imp_state == LUSTRE_IMP_CLOSED ||
- imp->imp_state == LUSTRE_IMP_DISCON)
- in_recovery = 0;
- spin_unlock(&imp->imp_lock);
- return in_recovery;
-}
+ rc = ptlrpc_connect_import(imp);
+ if (rc)
+ GOTO(out, rc);
-static int ptlrpc_recover_import_no_retry(struct obd_import *imp,
- char *new_uuid)
-{
- int rc;
- int in_recovery = 0;
- struct l_wait_info lwi;
- ENTRY;
+ if (!async) {
+ struct l_wait_info lwi;
+ int secs = cfs_time_seconds(obd_timeout);
- /* Check if reconnect is already in progress */
- spin_lock(&imp->imp_lock);
- if (imp->imp_state != LUSTRE_IMP_DISCON) {
- in_recovery = 1;
- }
- spin_unlock(&imp->imp_lock);
+ CDEBUG(D_HA, "%s: recovery started, waiting %u seconds\n",
+ obd2cli_tgt(imp->imp_obd), secs);
- if (in_recovery == 1)
- RETURN(-EALREADY);
+ lwi = LWI_TIMEOUT(secs, NULL, NULL);
+ rc = l_wait_event(imp->imp_recovery_waitq,
+ !ptlrpc_import_in_recovery(imp), &lwi);
+ CDEBUG(D_HA, "%s: recovery finished\n",
+ obd2cli_tgt(imp->imp_obd));
+ }
+ EXIT;
- rc = ptlrpc_connect_import(imp, new_uuid);
- if (rc)
- RETURN(rc);
+out:
+ return rc;
+}
+EXPORT_SYMBOL(ptlrpc_recover_import);
- CDEBUG(D_HA, "%s: recovery started, waiting\n",
- obd2cli_tgt(imp->imp_obd));
+int ptlrpc_import_in_recovery(struct obd_import *imp)
+{
+ int in_recovery = 1;
- lwi = LWI_TIMEOUT(cfs_timeout_cap(cfs_time_seconds(obd_timeout)),
- NULL, NULL);
- rc = l_wait_event(imp->imp_recovery_waitq,
- !ptlrpc_import_in_recovery(imp), &lwi);
- CDEBUG(D_HA, "%s: recovery finished\n",
- obd2cli_tgt(imp->imp_obd));
+ spin_lock(&imp->imp_lock);
+ if (imp->imp_state == LUSTRE_IMP_FULL ||
+ imp->imp_state == LUSTRE_IMP_CLOSED ||
+ imp->imp_state == LUSTRE_IMP_DISCON ||
+ imp->imp_obd->obd_no_recov)
+ in_recovery = 0;
+ spin_unlock(&imp->imp_lock);
- RETURN(rc);
+ return in_recovery;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff