-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Portal-RPC reconnection and replay operations, for use in recovery.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
- * Author: Mike Shaver <shaver@clusterfs.com>
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ptlrpc/recover.c
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Author: Mike Shaver <shaver@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_RPC
-#ifdef __KERNEL__
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/kmod.h>
-#else
-#include <liblustre.h>
-#endif
-
-#include <linux/lustre_ha.h>
-#include <linux/lustre_net.h>
-#include <linux/obd.h>
-
-int ptlrpc_reconnect_import(struct obd_import *imp, int rq_opc,
- struct ptlrpc_request **reqptr)
+#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_class.h>
+
+#include "ptlrpc_internal.h"
+
+/**
+ * Start recovery on disconnected import.
+ * This is done by just attempting a connect
+ */
+void ptlrpc_initiate_recovery(struct obd_import *imp)
{
- struct obd_device *obd = imp->imp_obd;
- struct client_obd *cli = &obd->u.cli;
- int size[] = { sizeof(cli->cl_target_uuid), sizeof(obd->obd_uuid) };
- char *tmp[] = {cli->cl_target_uuid.uuid, obd->obd_uuid.uuid};
- struct ptlrpc_connection *conn = imp->imp_connection;
- struct ptlrpc_request *req;
- struct obd_export *ldlmexp;
- struct lustre_handle old_hdl;
- int rc;
-
- req = ptlrpc_prep_req(imp, rq_opc, 2, size, tmp);
- if (!req)
- RETURN(-ENOMEM);
- req->rq_level = LUSTRE_CONN_NEW;
- req->rq_replen = lustre_msg_size(0, NULL);
- /*
- * This address is the export that represents our client-side LDLM
- * service (for ASTs). We should only have one on this list, so we
- * just grab the first one.
- *
- * XXX tear down export, call class_obd_connect?
- */
- ldlmexp = list_entry(obd->obd_exports.next, struct obd_export,
- exp_obd_chain);
- req->rq_reqmsg->addr = (__u64)(unsigned long)ldlmexp;
- req->rq_reqmsg->cookie = ldlmexp->exp_cookie;
- rc = ptlrpc_queue_wait(req);
- if (rc) {
- CERROR("cannot connect to %s@%s: rc = %d\n",
- cli->cl_target_uuid.uuid, conn->c_remote_uuid.uuid, rc);
- GOTO(out_disc, rc);
- }
- if (lustre_msg_get_op_flags(req->rq_repmsg) & MSG_CONNECT_RECONNECT) {
- memset(&old_hdl, 0, sizeof(old_hdl));
- if (!memcmp(&old_hdl.addr, &req->rq_repmsg->addr,
- sizeof (old_hdl.addr)) &&
- !memcmp(&old_hdl.cookie, &req->rq_repmsg->cookie,
- sizeof (old_hdl.cookie))) {
- CERROR("%s@%s didn't like our handle "LPX64"/"LPX64
- ", failed\n", cli->cl_target_uuid.uuid,
- conn->c_remote_uuid.uuid,
- (__u64)(unsigned long)ldlmexp,
- ldlmexp->exp_cookie);
- GOTO(out_disc, rc = -ENOTCONN);
- }
-
- old_hdl.addr = req->rq_repmsg->addr;
- old_hdl.cookie = req->rq_repmsg->cookie;
- if (memcmp(&imp->imp_handle, &old_hdl, sizeof(old_hdl))) {
- CERROR("%s@%s changed handle from "LPX64"/"LPX64
- " to "LPX64"/"LPX64"; "
- "copying, but this may foreshadow disaster\n",
- cli->cl_target_uuid.uuid,
- conn->c_remote_uuid.uuid,
- old_hdl.addr, old_hdl.cookie,
- imp->imp_handle.addr, imp->imp_handle.cookie);
- imp->imp_handle.addr = req->rq_repmsg->addr;
- imp->imp_handle.cookie = req->rq_repmsg->cookie;
- GOTO(out_disc, rc = 0);
- }
-
- CERROR("reconnected to %s@%s after partition\n",
- cli->cl_target_uuid.uuid, conn->c_remote_uuid.uuid);
- GOTO(out_disc, rc = 0);
- }
+ ENTRY;
+
+ CDEBUG(D_HA, "%s: starting recovery\n", obd2cli_tgt(imp->imp_obd));
+ ptlrpc_connect_import(imp);
+
+ EXIT;
+}
- old_hdl = imp->imp_handle;
- imp->imp_handle.addr = req->rq_repmsg->addr;
- imp->imp_handle.cookie = req->rq_repmsg->cookie;
- CERROR("reconnected to %s@%s ("LPX64"/"LPX64", was "LPX64"/"
- LPX64")!\n", cli->cl_target_uuid.uuid, conn->c_remote_uuid.uuid,
- imp->imp_handle.addr, imp->imp_handle.cookie,
- old_hdl.addr, old_hdl.cookie);
- GOTO(out_disc, rc = 0);
-
- out_disc:
- *reqptr = req;
- return rc;
+/**
+ * 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 ptlrpc_request *req = NULL;
+ __u64 last_transno;
+ ENTRY;
+
+ *inflight = 0;
+
+ /* 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;
+
+ 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)) {
+ req = list_last_entry(&imp->imp_committed_list,
+ 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) {
+ struct ptlrpc_request *tmp;
+
+ list_for_each_entry(tmp, &imp->imp_replay_list,
+ rq_replay_list) {
+ if (tmp->rq_transno > last_transno) {
+ req = tmp;
+ break;
+ }
+ }
+ }
+
+ /* 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",
+ 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);
}
-int ptlrpc_run_recovery_upcall(struct ptlrpc_connection *conn)
+/**
+ * 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)
{
- char *argv[3];
- char *envp[3];
- int rc;
+ struct ptlrpc_request *req;
ENTRY;
- argv[0] = obd_recovery_upcall;
- argv[1] = conn->c_remote_uuid.uuid;
- argv[2] = NULL;
-
- envp[0] = "HOME=/";
- envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
- envp[2] = NULL;
-
- rc = call_usermodehelper(argv[0], argv, envp);
- if (rc < 0) {
- CERROR("Error invoking recovery upcall %s for %s: %d\n",
- argv[0], argv[1], rc);
- CERROR("Check /proc/sys/lustre/recovery_upcall?\n");
- } else {
- CERROR("Invoked upcall %s for connection %s\n",
- argv[0], argv[1]);
- }
- /*
- * We don't want to make this a "failed" recovery, because the system
- * administrator -- or, perhaps, tester -- may well be able to rescue
- * things by running the correct upcall.
+ /* As long as we're in recovery, nothing should be added to the sending
+ * list, so we don't need to hold the lock during this iteration and
+ * resend process.
+ */
+ /* Well... what if lctl recover is called twice at the same time?
*/
- RETURN(0);
+ spin_lock(&imp->imp_lock);
+ if (imp->imp_state != LUSTRE_IMP_RECOVER) {
+ spin_unlock(&imp->imp_lock);
+ RETURN(-1);
+ }
+
+ list_for_each_entry(req, &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 ptlrpc_request *req;
+
+ spin_lock(&imp->imp_lock);
+ list_for_each_entry(req, &imp->imp_delayed_list, rq_list) {
+ DEBUG_REQ(D_HA, req, "waking (set %p):", req->rq_set);
+ ptlrpc_client_wake_req(req);
+ }
+ spin_unlock(&imp->imp_lock);
}
-int ptlrpc_replay(struct obd_import *imp)
+void ptlrpc_request_handle_notconn(struct ptlrpc_request *failed_req)
{
+ struct obd_import *imp = failed_req->rq_import;
+ int conn = lustre_msg_get_conn_cnt(failed_req->rq_reqmsg);
+ ENTRY;
+
+ CDEBUG(D_HA, "import %s of %s@%s abruptly disconnected: reconnecting\n",
+ imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
+ imp->imp_connection->c_remote_uuid.uuid);
+
+ if (ptlrpc_set_import_discon(imp, conn, true)) {
+ /* to control recovery via lctl {disable|enable}_recovery */
+ if (imp->imp_deactive == 0)
+ 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);
+
+ EXIT;
+}
+
+/**
+ * Administratively active/deactive a client.
+ * This should only be called by the ioctl interface, currently
+ * - the lctl deactivate and activate commands
+ * - echo 0/1 >> /proc/osc/XXX/active
+ * - client umount -f (ll_umount_begin)
+ */
+int ptlrpc_set_import_active(struct obd_import *imp, int active)
+{
+ struct obd_device *obd = imp->imp_obd;
int rc = 0;
- struct list_head *tmp, *pos;
- struct ptlrpc_request *req;
- unsigned long flags;
- __u64 committed = imp->imp_peer_committed_transno;
+
ENTRY;
+ LASSERT(obd);
- /* It might have committed some after we last spoke, so make sure we
- * get rid of them now.
- */
- spin_lock_irqsave(&imp->imp_lock, flags);
+ /* When deactivating, mark import invalid, and abort in-flight
+ * requests. */
+ if (!active) {
+ LCONSOLE_WARN("setting import %s INACTIVE by administrator "
+ "request\n", obd2cli_tgt(imp->imp_obd));
- ptlrpc_free_committed(imp);
+ /* 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);
- CDEBUG(D_HA, "import %p from %s has committed "LPD64"\n",
- imp, imp->imp_obd->u.cli.cl_target_uuid.uuid, committed);
+ obd_import_event(imp->imp_obd, imp, IMP_EVENT_DEACTIVATE);
- list_for_each(tmp, &imp->imp_replay_list) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
- DEBUG_REQ(D_HA, req, "RETAINED: ");
+ ptlrpc_invalidate_import(imp);
}
- list_for_each_safe(tmp, pos, &imp->imp_replay_list) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
+ /* When activating, mark import valid, and attempt recovery */
+ if (active) {
+ CDEBUG(D_HA, "setting import %s VALID\n",
+ obd2cli_tgt(imp->imp_obd));
- DEBUG_REQ(D_HA, req, "REPLAY:");
+ spin_lock(&imp->imp_lock);
+ imp->imp_deactive = 0;
+ spin_unlock(&imp->imp_lock);
+ obd_import_event(imp->imp_obd, imp, IMP_EVENT_ACTIVATE);
- /* XXX locking WRT failure during replay? */
- rc = ptlrpc_replay_req(req);
-
- if (rc) {
- CERROR("recovery replay error %d for req "LPD64"\n",
- rc, req->rq_xid);
- GOTO(out, rc);
- }
+ rc = ptlrpc_recover_import(imp, NULL, 0);
}
- out:
- spin_unlock_irqrestore(&imp->imp_lock, flags);
- return rc;
+ RETURN(rc);
}
+EXPORT_SYMBOL(ptlrpc_set_import_active);
-#define NO_RESEND 0 /* No action required. */
-#define RESEND 1 /* Resend required. */
-#define RESEND_IGNORE 2 /* Resend, ignore the reply (already saw it). */
-#define RESTART 3 /* Have to restart the call, sorry! */
-
-static int resend_type(struct ptlrpc_request *req, __u64 committed)
+/* Attempt to reconnect an import */
+int ptlrpc_recover_import(struct obd_import *imp, char *new_uuid, int async)
{
- if (req->rq_transno && req->rq_transno < committed) {
- if (req->rq_flags & PTL_RPC_FL_REPLIED) {
- /* Saw the reply and it was committed, no biggie. */
- DEBUG_REQ(D_HA, req, "NO_RESEND");
- return NO_RESEND;
- }
- /* Request committed, but no reply: have to restart. */
- return RESTART;
- }
-
- if (req->rq_flags & PTL_RPC_FL_REPLIED) {
- /* Saw reply, so resend and ignore new reply. */
- return RESEND_IGNORE;
- }
-
- /* Didn't see reply either, so resend. */
- return RESEND;
-
+ 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, false);
+
+ if (new_uuid) {
+ struct obd_uuid uuid;
+
+ /* intruct import to use new uuid */
+ obd_str2uuid(&uuid, new_uuid);
+ rc = import_set_conn_priority(imp, &uuid);
+ if (rc)
+ GOTO(out, 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);
+
+ OBD_RACE(OBD_FAIL_PTLRPC_CONNECT_RACE);
+
+ rc = ptlrpc_connect_import(imp);
+ if (rc)
+ GOTO(out, rc);
+
+ if (!async) {
+ long timeout = cfs_time_seconds(obd_timeout);
+
+ CDEBUG(D_HA, "%s: recovery started, waiting %u jiffies\n",
+ obd2cli_tgt(imp->imp_obd), obd_timeout);
+
+ rc = wait_event_idle_timeout(imp->imp_recovery_waitq,
+ !ptlrpc_import_in_recovery(imp),
+ timeout);
+ if (rc == 0)
+ rc = -ETIMEDOUT;
+ else
+ rc = 0;
+ CDEBUG(D_HA, "%s: recovery finished\n",
+ obd2cli_tgt(imp->imp_obd));
+ }
+ EXIT;
+
+out:
+ return rc;
}
+EXPORT_SYMBOL(ptlrpc_recover_import);
-int ptlrpc_resend(struct obd_import *imp)
+int ptlrpc_import_in_recovery(struct obd_import *imp)
{
- int rc = 0;
- struct list_head *tmp, *pos;
- struct ptlrpc_request *req;
- unsigned long flags;
- __u64 committed = imp->imp_peer_committed_transno;
+ int in_recovery = 1;
- ENTRY;
-
- spin_lock_irqsave(&imp->imp_lock, flags);
- list_for_each_safe(tmp, pos, &imp->imp_sending_list) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
-
- switch(resend_type(req, committed)) {
- case NO_RESEND:
- break;
-
- case RESTART:
- ptlrpc_restart_req(req);
- break;
-
- case RESEND_IGNORE:
- rc = ptlrpc_replay_req(req);
- if (rc) {
- DEBUG_REQ(D_ERROR, req, "error %d resending:",
- rc);
- ptlrpc_restart_req(req); /* might as well */
- }
- break;
-
- case RESEND:
- ptlrpc_resend_req(req);
- break;
-
- default:
- LBUG();
- }
- }
+ spin_lock(&imp->imp_lock);
+ if (imp->imp_state <= LUSTRE_IMP_DISCON ||
+ imp->imp_state >= LUSTRE_IMP_FULL ||
+ imp->imp_obd->obd_no_recov)
+ in_recovery = 0;
+ spin_unlock(&imp->imp_lock);
- spin_unlock_irqrestore(&imp->imp_lock, flags);
- RETURN(rc);
-}
-
-void ptlrpc_wake_delayed(struct obd_import *imp)
-{
- unsigned long flags;
- struct list_head *tmp, *pos;
- struct ptlrpc_request *req;
-
- spin_lock_irqsave(&imp->imp_lock, flags);
- 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:");
- wake_up(&req->rq_wait_for_rep);
- }
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ return in_recovery;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff