1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Portal-RPC reconnection and replay operations, for use in recovery.
6 * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
7 * Author: Mike Shaver <shaver@clusterfs.com>
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define DEBUG_SUBSYSTEM S_RPC
27 # include <linux/config.h>
28 # include <linux/module.h>
29 # include <linux/kmod.h>
31 # include <liblustre.h>
34 #include <linux/obd_support.h>
35 #include <linux/lustre_ha.h>
36 #include <linux/lustre_net.h>
37 #include <linux/lustre_import.h>
38 #include <linux/lustre_export.h>
39 #include <linux/obd.h>
40 #include <linux/obd_ost.h>
41 #include <linux/obd_class.h>
42 #include <linux/obd_lov.h> /* for IOC_LOV_SET_OSC_ACTIVE */
44 #include "ptlrpc_internal.h"
46 static int ptlrpc_recover_import_no_retry(struct obd_import *, char *);
48 void ptlrpc_run_recovery_over_upcall(struct obd_device *obd)
55 argv[0] = obd_lustre_upcall;
56 argv[1] = "RECOVERY_OVER";
57 argv[2] = obd->obd_uuid.uuid;
61 envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
64 rc = USERMODEHELPER(argv[0], argv, envp);
66 CERROR("Error invoking recovery upcall %s %s %s: %d; check "
67 "/proc/sys/lustre/upcall\n",
68 argv[0], argv[1], argv[2], rc);
71 CERROR("Invoked upcall %s %s %s\n",
72 argv[0], argv[1], argv[2]);
76 void ptlrpc_run_failed_import_upcall(struct obd_import* imp)
85 spin_lock_irqsave(&imp->imp_lock, flags);
86 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
87 spin_unlock_irqrestore(&imp->imp_lock, flags);
91 spin_unlock_irqrestore(&imp->imp_lock, flags);
93 argv[0] = obd_lustre_upcall;
94 argv[1] = "FAILED_IMPORT";
95 argv[2] = imp->imp_target_uuid.uuid;
96 argv[3] = imp->imp_obd->obd_name;
97 argv[4] = imp->imp_connection->c_remote_uuid.uuid;
98 argv[5] = imp->imp_obd->obd_uuid.uuid;
102 envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
105 rc = USERMODEHELPER(argv[0], argv, envp);
107 CERROR("Error invoking recovery upcall %s %s %s %s %s: %d; "
108 "check /proc/sys/lustre/lustre_upcall\n",
109 argv[0], argv[1], argv[2], argv[3], argv[4],rc);
112 CERROR("Invoked upcall %s %s %s %s %s\n",
113 argv[0], argv[1], argv[2], argv[3], argv[4]);
116 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
120 ptlrpc_recover_import(imp, NULL);
124 /* This might block waiting for the upcall to start, so it should
125 * not be called from a thread that shouldn't block. (Like ptlrpcd) */
126 void ptlrpc_initiate_recovery(struct obd_import *imp)
130 LASSERT (obd_lustre_upcall != NULL);
132 if (strcmp(obd_lustre_upcall, "DEFAULT") == 0) {
133 CDEBUG(D_ERROR, "%s: starting recovery without upcall\n",
134 imp->imp_target_uuid.uuid);
135 ptlrpc_connect_import(imp, NULL);
137 else if (strcmp(obd_lustre_upcall, "NONE") == 0) {
138 CDEBUG(D_ERROR, "%s: recovery diabled\n",
139 imp->imp_target_uuid.uuid);
142 CDEBUG(D_ERROR, "%s: calling upcall to start recovery\n",
143 imp->imp_target_uuid.uuid);
144 ptlrpc_run_failed_import_upcall(imp);
150 int ptlrpc_replay_next(struct obd_import *imp, int *inflight)
153 struct list_head *tmp, *pos;
154 struct ptlrpc_request *req;
161 /* It might have committed some after we last spoke, so make sure we
162 * get rid of them now.
164 spin_lock_irqsave(&imp->imp_lock, flags);
165 ptlrpc_free_committed(imp);
166 last_transno = imp->imp_last_replay_transno;
167 spin_unlock_irqrestore(&imp->imp_lock, flags);
169 CDEBUG(D_HA, "import %p from %s committed "LPU64" last "LPU64"\n",
170 imp, imp->imp_target_uuid.uuid, imp->imp_peer_committed_transno,
173 /* Do I need to hold a lock across this iteration? We shouldn't be
174 * racing with any additions to the list, because we're in recovery
175 * and are therefore not processing additional requests to add. Calls
176 * to ptlrpc_free_committed might commit requests, but nothing "newer"
177 * than the one we're replaying (it can't be committed until it's
178 * replayed, and we're doing that here). l_f_e_safe protects against
179 * problems with the current request being committed, in the unlikely
180 * event of that race. So, in conclusion, I think that it's safe to
181 * perform this list-walk without the imp_lock held.
183 * But, the {mdc,osc}_replay_open callbacks both iterate
184 * request lists, and have comments saying they assume the
185 * imp_lock is being held by ptlrpc_replay, but it's not. it's
186 * just a little race...
188 list_for_each_safe(tmp, pos, &imp->imp_replay_list) {
189 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
190 if (req->rq_transno > last_transno) {
191 rc = ptlrpc_replay_req(req);
193 CERROR("recovery replay error %d for req "
194 LPD64"\n", rc, req->rq_xid);
204 int ptlrpc_resend(struct obd_import *imp)
206 struct list_head *tmp, *pos;
207 struct ptlrpc_request *req;
212 /* As long as we're in recovery, nothing should be added to the sending
213 * list, so we don't need to hold the lock during this iteration and
216 /* Well... what if lctl recover is called twice at the same time?
218 spin_lock_irqsave(&imp->imp_lock, flags);
219 if (imp->imp_state != LUSTRE_IMP_RECOVER) {
220 spin_unlock_irqrestore(&imp->imp_lock, flags);
223 spin_unlock_irqrestore(&imp->imp_lock, flags);
225 list_for_each_safe(tmp, pos, &imp->imp_sending_list) {
226 req = list_entry(tmp, struct ptlrpc_request, rq_list);
227 ptlrpc_resend_req(req);
233 void ptlrpc_wake_delayed(struct obd_import *imp)
236 struct list_head *tmp, *pos;
237 struct ptlrpc_request *req;
239 spin_lock_irqsave(&imp->imp_lock, flags);
240 list_for_each_safe(tmp, pos, &imp->imp_delayed_list) {
241 req = list_entry(tmp, struct ptlrpc_request, rq_list);
243 DEBUG_REQ(D_HA, req, "waking (set %p):", req->rq_set);
244 ptlrpc_wake_client_req(req);
246 spin_unlock_irqrestore(&imp->imp_lock, flags);
249 void ptlrpc_request_handle_notconn(struct ptlrpc_request *failed_req)
252 struct obd_import *imp= failed_req->rq_import;
256 CDEBUG(D_HA, "import %s of %s@%s abruptly disconnected: reconnecting\n",
257 imp->imp_obd->obd_name,
258 imp->imp_target_uuid.uuid,
259 imp->imp_connection->c_remote_uuid.uuid);
261 if (ptlrpc_set_import_discon(imp)) {
262 if (!imp->imp_replayable) {
263 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
264 "auto-deactivating\n",
265 imp->imp_target_uuid.uuid,
266 imp->imp_connection->c_remote_uuid.uuid,
267 imp->imp_obd->obd_name);
268 ptlrpc_deactivate_import(imp);
271 rc = ptlrpc_connect_import(imp, NULL);
275 /* Wait for recovery to complete and resend. If evicted, then
276 this request will be errored out later.*/
277 spin_lock_irqsave(&failed_req->rq_lock, flags);
278 if (!failed_req->rq_no_resend)
279 failed_req->rq_resend = 1;
280 spin_unlock_irqrestore(&failed_req->rq_lock, flags);
286 * This should only be called by the ioctl interface, currently
287 * with the lctl deactivate and activate commands.
289 int ptlrpc_set_import_active(struct obd_import *imp, int active)
291 struct obd_device *obd = imp->imp_obd;
296 /* When deactivating, mark import invalid, and abort in-flight
299 ptlrpc_invalidate_import(imp, 0);
302 /* When activating, mark import valid, and attempt recovery */
304 CDEBUG(D_HA, "setting import %s VALID\n",
305 imp->imp_target_uuid.uuid);
306 rc = ptlrpc_recover_import(imp, NULL);
312 int ptlrpc_recover_import(struct obd_import *imp, char *new_uuid)
317 /* force import to be disconnected. */
318 ptlrpc_set_import_discon(imp);
320 rc = ptlrpc_recover_import_no_retry(imp, new_uuid);
325 int ptlrpc_import_in_recovery(struct obd_import *imp)
329 spin_lock_irqsave(&imp->imp_lock, flags);
330 if (imp->imp_state == LUSTRE_IMP_FULL ||
331 imp->imp_state == LUSTRE_IMP_CLOSED ||
332 imp->imp_state == LUSTRE_IMP_DISCON)
334 spin_unlock_irqrestore(&imp->imp_lock, flags);
338 static int ptlrpc_recover_import_no_retry(struct obd_import *imp,
344 struct l_wait_info lwi;
347 spin_lock_irqsave(&imp->imp_lock, flags);
348 if (imp->imp_state != LUSTRE_IMP_DISCON) {
351 spin_unlock_irqrestore(&imp->imp_lock, flags);
353 if (in_recovery == 1)
356 rc = ptlrpc_connect_import(imp, new_uuid);
360 CDEBUG(D_ERROR, "%s: recovery started, waiting\n",
361 imp->imp_target_uuid.uuid);
363 lwi = LWI_TIMEOUT(MAX(obd_timeout * HZ, 1), NULL, NULL);
364 rc = l_wait_event(imp->imp_recovery_waitq,
365 !ptlrpc_import_in_recovery(imp), &lwi);
366 CDEBUG(D_ERROR, "%s: recovery finished\n",
367 imp->imp_target_uuid.uuid);
372 void ptlrpc_fail_export(struct obd_export *exp)
374 int rc, already_failed;
377 spin_lock_irqsave(&exp->exp_lock, flags);
378 already_failed = exp->exp_failed;
380 spin_unlock_irqrestore(&exp->exp_lock, flags);
382 if (already_failed) {
383 CDEBUG(D_HA, "disconnecting dead export %p/%s; skipping\n",
384 exp, exp->exp_client_uuid.uuid);
388 CDEBUG(D_HA, "disconnecting export %p/%s\n",
389 exp, exp->exp_client_uuid.uuid);
391 /* Most callers into obd_disconnect are removing their own reference
392 * (request, for example) in addition to the one from the hash table.
393 * We don't have such a reference here, so make one. */
394 class_export_get(exp);
395 rc = obd_disconnect(exp, 0);
397 CERROR("disconnecting export %p failed: %d\n", exp, rc);