-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2003 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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.
*
- * 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.
+ * 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 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.
+ * 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
*
- * 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.
+ * 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.
*
- * OST<->MDS recovery logging thread.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Whamcloud, Inc.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*
+ * lustre/ptlrpc/recov_thread.c
+ *
+ * OST<->MDS recovery logging thread.
* Invariants in implementation:
* - we do not share logs among different OST<->MDS connections, so that
* if an OST or MDS fails it need only look at log(s) relevant to itself
+ *
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ * Yury Umanets <yury.umanets@sun.com>
+ * Alexey Lyashkov <alexey.lyashkov@sun.com>
*/
#define DEBUG_SUBSYSTEM S_LOG
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
#ifdef __KERNEL__
-#include <linux/fs.h>
+# include <libcfs/libcfs.h>
#else
-# include <portals/list.h>
+# include <libcfs/list.h>
# include <liblustre.h>
#endif
-#include <linux/kp30.h>
-#include <linux/obd_class.h>
-#include <linux/lustre_commit_confd.h>
-#include <linux/obd_support.h>
-#include <linux/obd_class.h>
-#include <linux/lustre_net.h>
-#include <portals/types.h>
-#include <portals/list.h>
-#include <linux/lustre_log.h>
+#include <obd_class.h>
+#include <obd_support.h>
+#include <obd_class.h>
+#include <lustre_net.h>
+#include <lnet/types.h>
+#include <libcfs/list.h>
+#include <lustre_log.h>
#include "ptlrpc_internal.h"
-#define LLCD_SIZE 4096
+static cfs_atomic_t llcd_count = CFS_ATOMIC_INIT(0);
+static cfs_mem_cache_t *llcd_cache = NULL;
#ifdef __KERNEL__
+enum {
+ LLOG_LCM_FL_START = 1 << 0,
+ LLOG_LCM_FL_EXIT = 1 << 1
+};
-static struct llog_commit_master lustre_lcm;
-static struct llog_commit_master *lcm = &lustre_lcm;
+struct llcd_async_args {
+ struct llog_canceld_ctxt *la_ctxt;
+};
-/* Allocate new commit structs in case we do not have enough */
-static int llcd_alloc(void)
+static void llcd_print(struct llog_canceld_ctxt *llcd,
+ const char *func, int line)
{
- struct llog_canceld_ctxt *llcd;
- int offset = offsetof(struct llog_canceld_ctxt, llcd_cookies);
+ CDEBUG(D_RPCTRACE, "Llcd (%p) at %s:%d:\n", llcd, func, line);
+ CDEBUG(D_RPCTRACE, " size: %d\n", llcd->llcd_size);
+ CDEBUG(D_RPCTRACE, " ctxt: %p\n", llcd->llcd_ctxt);
+ CDEBUG(D_RPCTRACE, " lcm : %p\n", llcd->llcd_lcm);
+ CDEBUG(D_RPCTRACE, " cookiebytes : %d\n", llcd->llcd_cookiebytes);
+}
- OBD_ALLOC(llcd, LLCD_SIZE + offset);
- if (llcd == NULL)
- return -ENOMEM;
+/**
+ * Allocate new llcd from cache, init it and return to caller.
+ * Bumps number of objects allocated.
+ */
+static struct llog_canceld_ctxt *llcd_alloc(struct llog_commit_master *lcm)
+{
+ struct llog_canceld_ctxt *llcd;
+ int size, overhead;
+
+ LASSERT(lcm != NULL);
+
+ /*
+ * We want to send one page of cookies with rpc header. This buffer
+ * will be assigned later to the rpc, this is why we preserve the
+ * space for rpc header.
+ */
+ size = CFS_PAGE_SIZE - lustre_msg_size(LUSTRE_MSG_MAGIC_V2, 1, NULL);
+ overhead = offsetof(struct llog_canceld_ctxt, llcd_cookies);
+ OBD_SLAB_ALLOC_GFP(llcd, llcd_cache, size + overhead, CFS_ALLOC_STD);
+ if (!llcd)
+ return NULL;
+
+ CFS_INIT_LIST_HEAD(&llcd->llcd_list);
+ llcd->llcd_cookiebytes = 0;
+ llcd->llcd_size = size;
+ cfs_spin_lock(&lcm->lcm_lock);
llcd->llcd_lcm = lcm;
+ cfs_atomic_inc(&lcm->lcm_count);
+ cfs_list_add_tail(&llcd->llcd_list, &lcm->lcm_llcds);
+ cfs_spin_unlock(&lcm->lcm_lock);
+ cfs_atomic_inc(&llcd_count);
- spin_lock(&lcm->lcm_llcd_lock);
- list_add(&llcd->llcd_list, &lcm->lcm_llcd_free);
- atomic_inc(&lcm->lcm_llcd_numfree);
- spin_unlock(&lcm->lcm_llcd_lock);
+ CDEBUG(D_RPCTRACE, "Alloc llcd %p on lcm %p (%d)\n",
+ llcd, lcm, cfs_atomic_read(&lcm->lcm_count));
- return 0;
+ return llcd;
}
-/* Get a free cookie struct from the list */
-struct llog_canceld_ctxt *llcd_grab(void)
+/**
+ * Returns passed llcd to cache.
+ */
+static void llcd_free(struct llog_canceld_ctxt *llcd)
{
- struct llog_canceld_ctxt *llcd;
-
- spin_lock(&lcm->lcm_llcd_lock);
- if (list_empty(&lcm->lcm_llcd_free)) {
- spin_unlock(&lcm->lcm_llcd_lock);
- if (llcd_alloc() < 0) {
- CERROR("unable to allocate log commit data!\n");
- return NULL;
+ struct llog_commit_master *lcm = llcd->llcd_lcm;
+ int size;
+
+ if (lcm) {
+ if (cfs_atomic_read(&lcm->lcm_count) == 0) {
+ CERROR("Invalid llcd free %p\n", llcd);
+ llcd_print(llcd, __FUNCTION__, __LINE__);
+ LBUG();
}
- spin_lock(&lcm->lcm_llcd_lock);
+ cfs_spin_lock(&lcm->lcm_lock);
+ LASSERT(!cfs_list_empty(&llcd->llcd_list));
+ cfs_list_del_init(&llcd->llcd_list);
+ cfs_atomic_dec(&lcm->lcm_count);
+ cfs_spin_unlock(&lcm->lcm_lock);
+
+ CDEBUG(D_RPCTRACE, "Free llcd %p on lcm %p (%d)\n",
+ llcd, lcm, cfs_atomic_read(&lcm->lcm_count));
}
- llcd = list_entry(lcm->lcm_llcd_free.next, typeof(*llcd), llcd_list);
- list_del(&llcd->llcd_list);
- atomic_dec(&lcm->lcm_llcd_numfree);
- spin_unlock(&lcm->lcm_llcd_lock);
-
- llcd->llcd_tries = 0;
- llcd->llcd_cookiebytes = 0;
+ LASSERT(cfs_atomic_read(&llcd_count) > 0);
+ cfs_atomic_dec(&llcd_count);
- return llcd;
+ size = offsetof(struct llog_canceld_ctxt, llcd_cookies) +
+ llcd->llcd_size;
+ OBD_SLAB_FREE(llcd, llcd_cache, size);
}
-EXPORT_SYMBOL(llcd_grab);
-static void llcd_put(struct llog_canceld_ctxt *llcd)
+/**
+ * Checks if passed cookie fits into llcd free space buffer. Returns
+ * 1 if yes and 0 otherwise.
+ */
+static inline int
+llcd_fit(struct llog_canceld_ctxt *llcd, struct llog_cookie *cookies)
{
- int offset = offsetof(struct llog_canceld_ctxt, llcd_cookies);
+ return (llcd->llcd_size - llcd->llcd_cookiebytes >= sizeof(*cookies));
+}
- if (atomic_read(&lcm->lcm_llcd_numfree) >= lcm->lcm_llcd_maxfree) {
- OBD_FREE(llcd, LLCD_SIZE + offset);
- } else {
- spin_lock(&lcm->lcm_llcd_lock);
- list_add(&llcd->llcd_list, &lcm->lcm_llcd_free);
- atomic_inc(&lcm->lcm_llcd_numfree);
- spin_unlock(&lcm->lcm_llcd_lock);
- }
+/**
+ * Copy passed @cookies to @llcd.
+ */
+static inline void
+llcd_copy(struct llog_canceld_ctxt *llcd, struct llog_cookie *cookies)
+{
+ LASSERT(llcd_fit(llcd, cookies));
+ memcpy((char *)llcd->llcd_cookies + llcd->llcd_cookiebytes,
+ cookies, sizeof(*cookies));
+ llcd->llcd_cookiebytes += sizeof(*cookies);
}
-/* Send some cookies to the appropriate target */
-void llcd_send(struct llog_canceld_ctxt *llcd)
+/**
+ * Llcd completion function. Called uppon llcd send finish regardless
+ * sending result. Error is passed in @rc. Note, that this will be called
+ * in cleanup time when all inflight rpcs aborted.
+ */
+static int
+llcd_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req, void *args, int rc)
{
- spin_lock(&llcd->llcd_lcm->lcm_llcd_lock);
- list_add_tail(&llcd->llcd_list, &llcd->llcd_lcm->lcm_llcd_pending);
- spin_unlock(&llcd->llcd_lcm->lcm_llcd_lock);
+ struct llcd_async_args *la = args;
+ struct llog_canceld_ctxt *llcd = la->la_ctxt;
- wake_up_nr(&llcd->llcd_lcm->lcm_waitq, 1);
+ CDEBUG(D_RPCTRACE, "Sent llcd %p (%d) - killing it\n", llcd, rc);
+ llcd_free(llcd);
+ return 0;
}
-EXPORT_SYMBOL(llcd_send);
-/* deleted objects have a commit callback that cancels the MDS
- * log record for the deletion. The commit callback calls this
- * function
+/**
+ * Send @llcd to remote node. Free llcd uppon completion or error. Sending
+ * is performed in async style so this function will return asap without
+ * blocking.
*/
-int llog_obd_repl_cancel(struct llog_ctxt *ctxt, int count,
- struct llog_cookie *cookies, int flags, void *data)
+static int llcd_send(struct llog_canceld_ctxt *llcd)
{
- struct llog_canceld_ctxt *llcd;
- int rc = 0;
+ char *bufs[2] = { NULL, (char *)llcd->llcd_cookies };
+ struct obd_import *import = NULL;
+ struct llog_commit_master *lcm;
+ struct llcd_async_args *la;
+ struct ptlrpc_request *req;
+ struct llog_ctxt *ctxt;
+ int rc;
ENTRY;
- LASSERT(ctxt);
- down(&ctxt->loc_sem);
- if (ctxt->loc_imp == NULL) {
- CWARN("no import for ctxt %p\n", ctxt);
- GOTO(out, rc = 0);
+ ctxt = llcd->llcd_ctxt;
+ if (!ctxt) {
+ CERROR("Invalid llcd with NULL ctxt found (%p)\n",
+ llcd);
+ llcd_print(llcd, __FUNCTION__, __LINE__);
+ LBUG();
}
+ LASSERT_MUTEX_LOCKED(&ctxt->loc_mutex);
- llcd = ctxt->loc_llcd;
- if (count > 0 && cookies != NULL) {
- if (llcd == NULL) {
- llcd = llcd_grab();
- if (llcd == NULL) {
- CERROR("couldn't get an llcd - dropped "LPX64":%x+%u\n",
- cookies->lgc_lgl.lgl_oid,
- cookies->lgc_lgl.lgl_ogen, cookies->lgc_index);
- GOTO(out, rc = -ENOMEM);
- }
- llcd->llcd_ctxt = ctxt;
- ctxt->loc_llcd = llcd;
- }
- memcpy((char *)llcd->llcd_cookies + llcd->llcd_cookiebytes,
- cookies, sizeof(*cookies));
- llcd->llcd_cookiebytes += sizeof(*cookies);
- } else {
- if (llcd == NULL || !(flags & OBD_LLOG_FL_SENDNOW))
- GOTO(out, rc);
+ if (llcd->llcd_cookiebytes == 0)
+ GOTO(exit, rc = 0);
+
+ lcm = llcd->llcd_lcm;
+
+ /*
+ * Check if we're in exit stage. Do not send llcd in
+ * this case.
+ */
+ if (cfs_test_bit(LLOG_LCM_FL_EXIT, &lcm->lcm_flags))
+ GOTO(exit, rc = -ENODEV);
+
+ CDEBUG(D_RPCTRACE, "Sending llcd %p\n", llcd);
+
+ import = llcd->llcd_ctxt->loc_imp;
+ if (!import || (import == LP_POISON) ||
+ (import->imp_client == LP_POISON)) {
+ CERROR("Invalid import %p for llcd %p\n",
+ import, llcd);
+ GOTO(exit, rc = -ENODEV);
}
- if ((LLCD_SIZE - llcd->llcd_cookiebytes < sizeof(*cookies) ||
- flags & OBD_LLOG_FL_SENDNOW)) {
- CDEBUG(D_HA, "send llcd %p:%p\n", llcd, llcd->llcd_ctxt);
- ctxt->loc_llcd = NULL;
- llcd_send(llcd);
+ OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_RECOV, 10);
+
+ /*
+ * No need to get import here as it is already done in
+ * llog_receptor_accept().
+ */
+ req = ptlrpc_request_alloc(import, &RQF_LOG_CANCEL);
+ if (req == NULL) {
+ CERROR("Can't allocate request for sending llcd %p\n",
+ llcd);
+ GOTO(exit, rc = -ENOMEM);
}
-out:
- up(&ctxt->loc_sem);
+ req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES,
+ RCL_CLIENT, llcd->llcd_cookiebytes);
+
+ rc = ptlrpc_request_bufs_pack(req, LUSTRE_LOG_VERSION,
+ OBD_LOG_CANCEL, bufs, NULL);
+ if (rc) {
+ ptlrpc_request_free(req);
+ GOTO(exit, rc);
+ }
+
+ ptlrpc_at_set_req_timeout(req);
+ ptlrpc_request_set_replen(req);
+
+ /* bug 5515 */
+ req->rq_request_portal = LDLM_CANCEL_REQUEST_PORTAL;
+ req->rq_reply_portal = LDLM_CANCEL_REPLY_PORTAL;
+
+ req->rq_interpret_reply = (ptlrpc_interpterer_t)llcd_interpret;
+
+ CLASSERT(sizeof(*la) <= sizeof(req->rq_async_args));
+ la = ptlrpc_req_async_args(req);
+ la->la_ctxt = llcd;
+
+ /* llog cancels will be replayed after reconnect so this will do twice
+ * first from replay llog, second for resended rpc */
+ req->rq_no_delay = req->rq_no_resend = 1;
+
+ ptlrpc_set_add_new_req(&lcm->lcm_pc, req);
+ RETURN(0);
+exit:
+ CDEBUG(D_RPCTRACE, "Refused llcd %p\n", llcd);
+ llcd_free(llcd);
return rc;
}
-EXPORT_SYMBOL(llog_obd_repl_cancel);
-int llog_obd_repl_sync(struct llog_ctxt *ctxt, struct obd_export *exp)
+/**
+ * Attach @llcd to @ctxt. Establish llcd vs. ctxt reserve connection
+ * so hat they can refer each other.
+ */
+static int
+llcd_attach(struct llog_ctxt *ctxt, struct llog_canceld_ctxt *llcd)
{
- int rc = 0;
- ENTRY;
+ LASSERT(ctxt != NULL && llcd != NULL);
+ LASSERT_MUTEX_LOCKED(&ctxt->loc_mutex);
+ LASSERT(ctxt->loc_llcd == NULL);
+ llcd->llcd_ctxt = llog_ctxt_get(ctxt);
+ ctxt->loc_llcd = llcd;
- if (exp && (ctxt->loc_imp == exp->exp_imp_reverse)) {
- down(&ctxt->loc_sem);
- if (ctxt->loc_llcd != NULL) {
- llcd_put(ctxt->loc_llcd);
- ctxt->loc_llcd = NULL;
- }
- CWARN("reverse import disconnected, put "
- "llcd %p:%p\n", ctxt->loc_llcd, ctxt);
- ctxt->loc_imp = NULL;
- up(&ctxt->loc_sem);
- } else {
- rc = llog_cancel(ctxt, 0, NULL, OBD_LLOG_FL_SENDNOW, NULL);
- }
+ CDEBUG(D_RPCTRACE, "Attach llcd %p to ctxt %p\n",
+ llcd, ctxt);
- RETURN(rc);
+ return 0;
}
-EXPORT_SYMBOL(llog_obd_repl_sync);
-static int log_commit_thread(void *arg)
+/**
+ * Opposite to llcd_attach(). Detaches llcd from its @ctxt. This makes
+ * sure that this llcd will not be found another time we try to cancel.
+ */
+static struct llog_canceld_ctxt *llcd_detach(struct llog_ctxt *ctxt)
{
- struct llog_commit_master *lcm = arg;
- struct llog_commit_daemon *lcd;
- struct llog_canceld_ctxt *llcd, *n;
- unsigned long flags;
- ENTRY;
-
- OBD_ALLOC(lcd, sizeof(*lcd));
- if (lcd == NULL)
- RETURN(-ENOMEM);
+ struct llog_canceld_ctxt *llcd;
- lock_kernel();
- ptlrpc_daemonize(); /* thread never needs to do IO */
-
- SIGNAL_MASK_LOCK(current, flags);
- sigfillset(¤t->blocked);
- RECALC_SIGPENDING;
- SIGNAL_MASK_UNLOCK(current, flags);
-
- spin_lock(&lcm->lcm_thread_lock);
-
- THREAD_NAME(current->comm, sizeof(current->comm) - 1,
- "ll_log_comt_%02d", atomic_read(&lcm->lcm_thread_total));
- atomic_inc(&lcm->lcm_thread_total);
- spin_unlock(&lcm->lcm_thread_lock);
- unlock_kernel();
-
- INIT_LIST_HEAD(&lcd->lcd_lcm_list);
- INIT_LIST_HEAD(&lcd->lcd_llcd_list);
- lcd->lcd_lcm = lcm;
-
- CDEBUG(D_HA, "%s started\n", current->comm);
- do {
- struct ptlrpc_request *request;
- struct obd_import *import = NULL;
- struct list_head *sending_list;
- int rc = 0;
-
- /* If we do not have enough pages available, allocate some */
- while (atomic_read(&lcm->lcm_llcd_numfree) <
- lcm->lcm_llcd_minfree) {
- if (llcd_alloc() < 0)
- break;
- }
+ LASSERT(ctxt != NULL);
+ LASSERT_MUTEX_LOCKED(&ctxt->loc_mutex);
- spin_lock(&lcm->lcm_thread_lock);
- atomic_inc(&lcm->lcm_thread_numidle);
- list_move(&lcd->lcd_lcm_list, &lcm->lcm_thread_idle);
- spin_unlock(&lcm->lcm_thread_lock);
-
- wait_event_interruptible(lcm->lcm_waitq,
- !list_empty(&lcm->lcm_llcd_pending) ||
- lcm->lcm_flags & LLOG_LCM_FL_EXIT);
-
- /* If we are the last available thread, start a new one in case
- * we get blocked on an RPC (nobody else will start a new one)*/
- spin_lock(&lcm->lcm_thread_lock);
- atomic_dec(&lcm->lcm_thread_numidle);
- list_move(&lcd->lcd_lcm_list, &lcm->lcm_thread_busy);
- spin_unlock(&lcm->lcm_thread_lock);
-
- sending_list = &lcm->lcm_llcd_pending;
- resend:
- if (lcm->lcm_flags & LLOG_LCM_FL_EXIT) {
- lcm->lcm_llcd_maxfree = 0;
- lcm->lcm_llcd_minfree = 0;
- lcm->lcm_thread_max = 0;
-
- if (list_empty(&lcm->lcm_llcd_pending) ||
- lcm->lcm_flags & LLOG_LCM_FL_EXIT_FORCE)
- break;
- }
+ llcd = ctxt->loc_llcd;
+ if (!llcd)
+ return NULL;
- if (atomic_read(&lcm->lcm_thread_numidle) <= 1 &&
- atomic_read(&lcm->lcm_thread_total) < lcm->lcm_thread_max) {
- rc = llog_start_commit_thread();
- if (rc < 0)
- CERROR("error starting thread: rc %d\n", rc);
- }
+ CDEBUG(D_RPCTRACE, "Detach llcd %p from ctxt %p\n",
+ llcd, ctxt);
- /* Move all of the pending cancels from the same OST off of
- * the list, so we don't get multiple threads blocked and/or
- * doing upcalls on the same OST in case of failure. */
- spin_lock(&lcm->lcm_llcd_lock);
- if (!list_empty(sending_list)) {
- list_move_tail(sending_list->next,
- &lcd->lcd_llcd_list);
- llcd = list_entry(lcd->lcd_llcd_list.next,
- typeof(*llcd), llcd_list);
- LASSERT(llcd->llcd_lcm == lcm);
- import = llcd->llcd_ctxt->loc_imp;
- }
- list_for_each_entry_safe(llcd, n, sending_list, llcd_list) {
- LASSERT(llcd->llcd_lcm == lcm);
- if (import == llcd->llcd_ctxt->loc_imp)
- list_move_tail(&llcd->llcd_list,
- &lcd->lcd_llcd_list);
- }
- if (sending_list != &lcm->lcm_llcd_resend) {
- list_for_each_entry_safe(llcd, n, &lcm->lcm_llcd_resend,
- llcd_list) {
- LASSERT(llcd->llcd_lcm == lcm);
- if (import == llcd->llcd_ctxt->loc_imp)
- list_move_tail(&llcd->llcd_list,
- &lcd->lcd_llcd_list);
- }
- }
- spin_unlock(&lcm->lcm_llcd_lock);
-
- /* We are the only one manipulating our local list - no lock */
- list_for_each_entry_safe(llcd,n, &lcd->lcd_llcd_list,llcd_list){
- char *bufs[1] = {(char *)llcd->llcd_cookies};
-
- list_del(&llcd->llcd_list);
- if (llcd->llcd_cookiebytes == 0) {
- CDEBUG(D_HA, "put empty llcd %p:%p\n",
- llcd, llcd->llcd_ctxt);
- llcd_put(llcd);
- continue;
- }
-
- down(&llcd->llcd_ctxt->loc_sem);
- if (llcd->llcd_ctxt->loc_imp == NULL) {
- up(&llcd->llcd_ctxt->loc_sem);
- CWARN("import will be destroyed, put "
- "llcd %p:%p\n", llcd, llcd->llcd_ctxt);
- llcd_put(llcd);
- continue;
- }
-
- up(&llcd->llcd_ctxt->loc_sem);
- request = ptlrpc_prep_req(import, LUSTRE_LOG_VERSION,
- OBD_LOG_CANCEL, 1,
- &llcd->llcd_cookiebytes,
- bufs);
-
- if (request == NULL) {
- rc = -ENOMEM;
- CERROR("error preparing commit: rc %d\n", rc);
-
- spin_lock(&lcm->lcm_llcd_lock);
- list_splice(&lcd->lcd_llcd_list,
- &lcm->lcm_llcd_resend);
- INIT_LIST_HEAD(&lcd->lcd_llcd_list);
- spin_unlock(&lcm->lcm_llcd_lock);
- break;
- }
-
- request->rq_replen = lustre_msg_size(0, NULL);
- down(&llcd->llcd_ctxt->loc_sem);
- if (llcd->llcd_ctxt->loc_imp == NULL) {
- up(&llcd->llcd_ctxt->loc_sem);
- CWARN("import will be destroyed, put "
- "llcd %p:%p\n", llcd, llcd->llcd_ctxt);
- llcd_put(llcd);
- ptlrpc_req_finished(request);
- continue;
- }
- up(&llcd->llcd_ctxt->loc_sem);
- rc = ptlrpc_queue_wait(request);
- ptlrpc_req_finished(request);
-
- /* If the RPC failed, we put this and the remaining
- * messages onto the resend list for another time. */
- if (rc == 0) {
- llcd_put(llcd);
- continue;
- }
-
-#if 0 /* FIXME just put llcd, not put it on resend list */
- spin_lock(&lcm->lcm_llcd_lock);
- list_splice(&lcd->lcd_llcd_list, &lcm->lcm_llcd_resend);
- if (++llcd->llcd_tries < 5) {
- CERROR("commit %p failed on attempt %d: rc %d\n",
- llcd, llcd->llcd_tries, rc);
-
- list_add_tail(&llcd->llcd_list,
- &lcm->lcm_llcd_resend);
- spin_unlock(&lcm->lcm_llcd_lock);
- } else {
- spin_unlock(&lcm->lcm_llcd_lock);
-#endif
- CERROR("commit %p:%p drop %d cookies: rc %d\n",
- llcd, llcd->llcd_ctxt,
- (int)(llcd->llcd_cookiebytes /
- sizeof(*llcd->llcd_cookies)), rc);
- llcd_put(llcd);
-#if 0
- }
- break;
-#endif
- }
+ ctxt->loc_llcd = NULL;
+ llog_ctxt_put(ctxt);
+ return llcd;
+}
- if (rc == 0) {
- sending_list = &lcm->lcm_llcd_resend;
- if (!list_empty(sending_list))
- goto resend;
- }
- } while(1);
-
- /* If we are force exiting, just drop all of the cookies. */
- if (lcm->lcm_flags & LLOG_LCM_FL_EXIT_FORCE) {
- spin_lock(&lcm->lcm_llcd_lock);
- list_splice(&lcm->lcm_llcd_pending, &lcd->lcd_llcd_list);
- list_splice(&lcm->lcm_llcd_resend, &lcd->lcd_llcd_list);
- list_splice(&lcm->lcm_llcd_free, &lcd->lcd_llcd_list);
- spin_unlock(&lcm->lcm_llcd_lock);
-
- list_for_each_entry_safe(llcd, n, &lcd->lcd_llcd_list,llcd_list)
- llcd_put(llcd);
+/**
+ * Return @llcd cached in @ctxt. Allocate new one if required. Attach it
+ * to ctxt so that it may be used for gathering cookies and sending.
+ */
+static struct llog_canceld_ctxt *llcd_get(struct llog_ctxt *ctxt)
+{
+ struct llog_canceld_ctxt *llcd;
+ LASSERT(ctxt);
+ llcd = llcd_alloc(ctxt->loc_lcm);
+ if (!llcd) {
+ CERROR("Can't alloc an llcd for ctxt %p\n", ctxt);
+ return NULL;
}
+ llcd_attach(ctxt, llcd);
+ return llcd;
+}
- spin_lock(&lcm->lcm_thread_lock);
- list_del(&lcd->lcd_lcm_list);
- spin_unlock(&lcm->lcm_thread_lock);
- OBD_FREE(lcd, sizeof(*lcd));
+/**
+ * Deatch llcd from its @ctxt. Free llcd.
+ */
+static void llcd_put(struct llog_ctxt *ctxt)
+{
+ struct llog_canceld_ctxt *llcd;
- spin_lock(&lcm->lcm_thread_lock);
- atomic_dec(&lcm->lcm_thread_total);
- spin_unlock(&lcm->lcm_thread_lock);
- wake_up(&lcm->lcm_waitq);
+ llcd = llcd_detach(ctxt);
+ if (llcd)
+ llcd_free(llcd);
+}
- CDEBUG(D_HA, "%s exiting\n", current->comm);
- return 0;
+/**
+ * Detach llcd from its @ctxt so that nobody will find it with try to
+ * re-use. Send llcd to remote node.
+ */
+static int llcd_push(struct llog_ctxt *ctxt)
+{
+ struct llog_canceld_ctxt *llcd;
+ int rc;
+
+ /*
+ * Make sure that this llcd will not be sent again as we detach
+ * it from ctxt.
+ */
+ llcd = llcd_detach(ctxt);
+ if (!llcd) {
+ CERROR("Invalid detached llcd found %p\n", llcd);
+ llcd_print(llcd, __FUNCTION__, __LINE__);
+ LBUG();
+ }
+
+ rc = llcd_send(llcd);
+ if (rc)
+ CERROR("Couldn't send llcd %p (%d)\n", llcd, rc);
+ return rc;
}
-int llog_start_commit_thread(void)
+/**
+ * Start recovery thread which actually deals llcd sending. This
+ * is all ptlrpc standard thread based so there is not much of work
+ * to do.
+ */
+int llog_recov_thread_start(struct llog_commit_master *lcm)
{
int rc;
ENTRY;
- if (atomic_read(&lcm->lcm_thread_total) >= lcm->lcm_thread_max)
- RETURN(0);
-
- rc = kernel_thread(log_commit_thread, lcm, CLONE_VM | CLONE_FILES);
- if (rc < 0) {
- CERROR("error starting thread #%d: %d\n",
- atomic_read(&lcm->lcm_thread_total), rc);
+ rc = ptlrpcd_start(-1, 1, lcm->lcm_name, &lcm->lcm_pc);
+ if (rc) {
+ CERROR("Error %d while starting recovery thread %s\n",
+ rc, lcm->lcm_name);
RETURN(rc);
}
-
- RETURN(0);
+ RETURN(rc);
}
-EXPORT_SYMBOL(llog_start_commit_thread);
-
-static struct llog_process_args {
- struct semaphore llpa_sem;
- struct llog_ctxt *llpa_ctxt;
- void *llpa_cb;
- void *llpa_arg;
-} llpa;
+EXPORT_SYMBOL(llog_recov_thread_start);
-int llog_init_commit_master(void)
+/**
+ * Stop recovery thread. Complement to llog_recov_thread_start().
+ */
+void llog_recov_thread_stop(struct llog_commit_master *lcm, int force)
{
- INIT_LIST_HEAD(&lcm->lcm_thread_busy);
- INIT_LIST_HEAD(&lcm->lcm_thread_idle);
- spin_lock_init(&lcm->lcm_thread_lock);
- atomic_set(&lcm->lcm_thread_numidle, 0);
- init_waitqueue_head(&lcm->lcm_waitq);
- INIT_LIST_HEAD(&lcm->lcm_llcd_pending);
- INIT_LIST_HEAD(&lcm->lcm_llcd_resend);
- INIT_LIST_HEAD(&lcm->lcm_llcd_free);
- spin_lock_init(&lcm->lcm_llcd_lock);
- atomic_set(&lcm->lcm_llcd_numfree, 0);
- lcm->lcm_llcd_minfree = 0;
- lcm->lcm_thread_max = 5;
- /* FIXME initialize semaphore for llog_process_args */
- sema_init(&llpa.llpa_sem, 1);
- return 0;
+ ENTRY;
+
+ /*
+ * Let all know that we're stopping. This will also make
+ * llcd_send() refuse any new llcds.
+ */
+ cfs_set_bit(LLOG_LCM_FL_EXIT, &lcm->lcm_flags);
+
+ /*
+ * Stop processing thread. No new rpcs will be accepted for
+ * for processing now.
+ */
+ ptlrpcd_stop(&lcm->lcm_pc, force);
+
+ /*
+ * By this point no alive inflight llcds should be left. Only
+ * those forgotten in sync may still be attached to ctxt. Let's
+ * print them.
+ */
+ if (cfs_atomic_read(&lcm->lcm_count) != 0) {
+ struct llog_canceld_ctxt *llcd;
+ cfs_list_t *tmp;
+
+ CERROR("Busy llcds found (%d) on lcm %p\n",
+ cfs_atomic_read(&lcm->lcm_count), lcm);
+
+ cfs_spin_lock(&lcm->lcm_lock);
+ cfs_list_for_each(tmp, &lcm->lcm_llcds) {
+ llcd = cfs_list_entry(tmp, struct llog_canceld_ctxt,
+ llcd_list);
+ llcd_print(llcd, __FUNCTION__, __LINE__);
+ }
+ cfs_spin_unlock(&lcm->lcm_lock);
+
+ /*
+ * No point to go further with busy llcds at this point
+ * as this is clear bug. It might mean we got hanging
+ * rpc which holds import ref and this means we will not
+ * be able to cleanup anyways.
+ *
+ * Or we just missed to kill them when they were not
+ * attached to ctxt. In this case our slab will remind
+ * us about this a bit later.
+ */
+ LBUG();
+ }
+ EXIT;
}
+EXPORT_SYMBOL(llog_recov_thread_stop);
-int llog_cleanup_commit_master(int force)
+/**
+ * Initialize commit master structure and start recovery thread on it.
+ */
+struct llog_commit_master *llog_recov_thread_init(char *name)
{
- lcm->lcm_flags |= LLOG_LCM_FL_EXIT;
- if (force)
- lcm->lcm_flags |= LLOG_LCM_FL_EXIT_FORCE;
- wake_up(&lcm->lcm_waitq);
+ struct llog_commit_master *lcm;
+ int rc;
+ ENTRY;
- wait_event_interruptible(lcm->lcm_waitq,
- atomic_read(&lcm->lcm_thread_total) == 0);
- return 0;
+ OBD_ALLOC_PTR(lcm);
+ if (!lcm)
+ RETURN(NULL);
+
+ /*
+ * Try to create threads with unique names.
+ */
+ snprintf(lcm->lcm_name, sizeof(lcm->lcm_name),
+ "lcm_%s", name);
+
+ cfs_atomic_set(&lcm->lcm_count, 0);
+ cfs_atomic_set(&lcm->lcm_refcount, 1);
+ cfs_spin_lock_init(&lcm->lcm_lock);
+ CFS_INIT_LIST_HEAD(&lcm->lcm_llcds);
+ rc = llog_recov_thread_start(lcm);
+ if (rc) {
+ CERROR("Can't start commit thread, rc %d\n", rc);
+ GOTO(out, rc);
+ }
+ RETURN(lcm);
+out:
+ OBD_FREE_PTR(lcm);
+ return NULL;
}
+EXPORT_SYMBOL(llog_recov_thread_init);
-static int log_process_thread(void *args)
+/**
+ * Finalize commit master and its recovery thread.
+ */
+void llog_recov_thread_fini(struct llog_commit_master *lcm, int force)
{
- struct llog_process_args *data = args;
- struct llog_ctxt *ctxt = data->llpa_ctxt;
- void *cb = data->llpa_cb;
- struct llog_logid logid = *(struct llog_logid *)(data->llpa_arg);
- struct llog_handle *llh = NULL;
- unsigned long flags;
+ ENTRY;
+ llog_recov_thread_stop(lcm, force);
+ lcm_put(lcm);
+ EXIT;
+}
+EXPORT_SYMBOL(llog_recov_thread_fini);
+
+static int llog_recov_thread_replay(struct llog_ctxt *ctxt,
+ void *cb, void *arg)
+{
+ struct obd_device *obd = ctxt->loc_obd;
+ struct llog_process_cat_args *lpca;
int rc;
ENTRY;
- up(&data->llpa_sem);
- lock_kernel();
- ptlrpc_daemonize(); /* thread never needs to do IO */
+ if (obd->obd_stopping)
+ RETURN(-ENODEV);
- THREAD_NAME(current->comm, sizeof(current->comm) - 1, "llog_process");
- SIGNAL_MASK_LOCK(current, flags);
- sigfillset(¤t->blocked);
- RECALC_SIGPENDING;
- SIGNAL_MASK_UNLOCK(current, flags);
- unlock_kernel();
+ /*
+ * This will be balanced in llog_cat_process_thread()
+ */
+ OBD_ALLOC_PTR(lpca);
+ if (!lpca)
+ RETURN(-ENOMEM);
- rc = llog_open(ctxt, &llh, &logid, NULL, 0);
- if (rc) {
- CERROR("llog_create failed %d\n", rc);
- RETURN(rc);
- }
- rc = llog_init_handle(llh, LLOG_F_IS_CAT, NULL);
- if (rc) {
- CERROR("llog_init_handle failed %d\n", rc);
- GOTO(out, rc);
- }
+ lpca->lpca_cb = cb;
+ lpca->lpca_arg = arg;
- if (cb) {
- rc = llog_cat_process(llh, (llog_cb_t)cb, NULL);
- if (rc != LLOG_PROC_BREAK)
- CERROR("llog_cat_process failed %d\n", rc);
+ /*
+ * This will be balanced in llog_cat_process_thread()
+ */
+ lpca->lpca_ctxt = llog_ctxt_get(ctxt);
+ if (!lpca->lpca_ctxt) {
+ OBD_FREE_PTR(lpca);
+ RETURN(-ENODEV);
+ }
+ rc = cfs_create_thread(llog_cat_process_thread, lpca, CFS_DAEMON_FLAGS);
+ if (rc < 0) {
+ CERROR("Error starting llog_cat_process_thread(): %d\n", rc);
+ OBD_FREE_PTR(lpca);
+ llog_ctxt_put(ctxt);
} else {
- CWARN("no callback function for recovery\n");
+ CDEBUG(D_HA, "Started llog_cat_process_thread(): %d\n", rc);
+ rc = 0;
}
- CDEBUG(D_HA, "send llcd %p:%p forcibly after recovery\n",
- ctxt->loc_llcd, ctxt);
- llog_sync(ctxt, NULL);
-out:
- rc = llog_cat_put(llh);
- if (rc)
- CERROR("llog_cat_put failed %d\n", rc);
-
RETURN(rc);
}
-static int llog_recovery_generic(struct llog_ctxt *ctxt, void *handle,void *arg)
+int llog_obd_repl_connect(struct llog_ctxt *ctxt,
+ struct llog_logid *logid, struct llog_gen *gen,
+ struct obd_uuid *uuid)
{
int rc;
ENTRY;
- down(&llpa.llpa_sem);
- llpa.llpa_ctxt = ctxt;
- llpa.llpa_cb = handle;
- llpa.llpa_arg = arg;
+ /*
+ * Send back cached llcd from llog before recovery if we have any.
+ * This is void is nothing cached is found there.
+ */
+ llog_sync(ctxt, NULL, 0);
- rc = kernel_thread(log_process_thread, &llpa, CLONE_VM | CLONE_FILES);
- if (rc < 0)
- CERROR("error starting log_process_thread: %d\n", rc);
- else {
- CDEBUG(D_HA, "log_process_thread: %d\n", rc);
- rc = 0;
- }
+ /*
+ * Start recovery in separate thread.
+ */
+ cfs_mutex_lock(&ctxt->loc_mutex);
+ ctxt->loc_gen = *gen;
+ rc = llog_recov_thread_replay(ctxt, ctxt->llog_proc_cb, logid);
+ cfs_mutex_unlock(&ctxt->loc_mutex);
RETURN(rc);
}
+EXPORT_SYMBOL(llog_obd_repl_connect);
-int llog_repl_connect(struct llog_ctxt *ctxt, int count,
- struct llog_logid *logid, struct llog_gen *gen,
- struct obd_uuid *uuid)
+/**
+ * Deleted objects have a commit callback that cancels the MDS
+ * log record for the deletion. The commit callback calls this
+ * function.
+ */
+int llog_obd_repl_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct lov_stripe_md *lsm, int count,
+ struct llog_cookie *cookies, int flags)
{
+ struct llog_commit_master *lcm;
struct llog_canceld_ctxt *llcd;
- int rc;
+ int rc = 0;
ENTRY;
- /* send back llcd before recovery from llog */
- if (ctxt->loc_llcd != NULL) {
- CWARN("llcd %p:%p not empty\n", ctxt->loc_llcd, ctxt);
- llog_sync(ctxt, NULL);
+ LASSERT(ctxt != NULL);
+
+ cfs_mutex_lock(&ctxt->loc_mutex);
+ if (!ctxt->loc_lcm) {
+ CDEBUG(D_RPCTRACE, "No lcm for ctxt %p\n", ctxt);
+ GOTO(out, rc = -ENODEV);
+ }
+ lcm = ctxt->loc_lcm;
+ CDEBUG(D_INFO, "cancel on lsm %p\n", lcm);
+
+ /*
+ * Let's check if we have all structures alive. We also check for
+ * possible shutdown. Do nothing if we're stopping.
+ */
+ if (ctxt->loc_flags & LLOG_CTXT_FLAG_STOP) {
+ CDEBUG(D_RPCTRACE, "Last sync was done for ctxt %p\n", ctxt);
+ GOTO(out, rc = -ENODEV);
+ }
+
+ if (ctxt->loc_imp == NULL) {
+ CDEBUG(D_RPCTRACE, "No import for ctxt %p\n", ctxt);
+ GOTO(out, rc = -ENODEV);
}
- down(&ctxt->loc_sem);
- ctxt->loc_gen = *gen;
- llcd = llcd_grab();
- if (llcd == NULL) {
- CERROR("couldn't get an llcd\n");
- up(&ctxt->loc_sem);
- RETURN(-ENOMEM);
+ if (cfs_test_bit(LLOG_LCM_FL_EXIT, &lcm->lcm_flags)) {
+ CDEBUG(D_RPCTRACE, "Commit thread is stopping for ctxt %p\n",
+ ctxt);
+ GOTO(out, rc = -ENODEV);
}
- llcd->llcd_ctxt = ctxt;
- ctxt->loc_llcd = llcd;
- up(&ctxt->loc_sem);
- rc = llog_recovery_generic(ctxt, ctxt->llog_proc_cb, logid);
- if (rc != 0)
- CERROR("error recovery process: %d\n", rc);
+ llcd = ctxt->loc_llcd;
+
+ if (count > 0 && cookies != NULL) {
+ /*
+ * Get new llcd from ctxt if required.
+ */
+ if (!llcd) {
+ llcd = llcd_get(ctxt);
+ if (!llcd)
+ GOTO(out, rc = -ENOMEM);
+ /*
+ * Allocation is successful, let's check for stop
+ * flag again to fall back as soon as possible.
+ */
+ if (cfs_test_bit(LLOG_LCM_FL_EXIT, &lcm->lcm_flags))
+ GOTO(out, rc = -ENODEV);
+ }
+
+ /*
+ * Llcd does not have enough room for @cookies. Let's push
+ * it out and allocate new one.
+ */
+ if (!llcd_fit(llcd, cookies)) {
+ rc = llcd_push(ctxt);
+ if (rc)
+ GOTO(out, rc);
+ llcd = llcd_get(ctxt);
+ if (!llcd)
+ GOTO(out, rc = -ENOMEM);
+ /*
+ * Allocation is successful, let's check for stop
+ * flag again to fall back as soon as possible.
+ */
+ if (cfs_test_bit(LLOG_LCM_FL_EXIT, &lcm->lcm_flags))
+ GOTO(out, rc = -ENODEV);
+ }
+
+ /*
+ * Copy cookies to @llcd, no matter old or new allocated
+ * one.
+ */
+ llcd_copy(llcd, cookies);
+ }
+
+ /*
+ * Let's check if we need to send copied @cookies asap. If yes
+ * then do it.
+ */
+ if (llcd && (flags & OBD_LLOG_FL_SENDNOW)) {
+ CDEBUG(D_RPCTRACE, "Sync llcd %p\n", llcd);
+ rc = llcd_push(ctxt);
+ if (rc)
+ GOTO(out, rc);
+ }
+ EXIT;
+out:
+ if (rc)
+ llcd_put(ctxt);
+
+ if (flags & OBD_LLOG_FL_EXIT)
+ ctxt->loc_flags = LLOG_CTXT_FLAG_STOP;
+
+ cfs_mutex_unlock(&ctxt->loc_mutex);
+ return rc;
+}
+EXPORT_SYMBOL(llog_obd_repl_cancel);
+
+int llog_obd_repl_sync(struct llog_ctxt *ctxt, struct obd_export *exp,
+ int flags)
+{
+ int rc = 0;
+ ENTRY;
+ /*
+ * Flush any remaining llcd.
+ */
+ cfs_mutex_lock(&ctxt->loc_mutex);
+ if (exp && (ctxt->loc_imp == exp->exp_imp_reverse)) {
+ /*
+ * This is ost->mds connection, we can't be sure that mds
+ * can still receive cookies, let's killed the cached llcd.
+ */
+ CDEBUG(D_RPCTRACE, "Kill cached llcd\n");
+ llcd_put(ctxt);
+
+ if (flags & OBD_LLOG_FL_EXIT)
+ ctxt->loc_flags = LLOG_CTXT_FLAG_STOP;
+
+ cfs_mutex_unlock(&ctxt->loc_mutex);
+ } else {
+ /*
+ * This is either llog_sync() from generic llog code or sync
+ * on client disconnect. In either way let's do it and send
+ * llcds to the target with waiting for completion.
+ */
+ CDEBUG(D_RPCTRACE, "Sync cached llcd\n");
+ cfs_mutex_unlock(&ctxt->loc_mutex);
+ rc = llog_cancel(NULL, ctxt, NULL, 0, NULL,
+ OBD_LLOG_FL_SENDNOW | flags);
+ }
RETURN(rc);
}
-EXPORT_SYMBOL(llog_repl_connect);
+EXPORT_SYMBOL(llog_obd_repl_sync);
#else /* !__KERNEL__ */
-int llog_obd_repl_cancel(struct llog_ctxt *ctxt, int count,
- struct llog_cookie *cookies, int flags, void *data)
+int llog_obd_repl_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct lov_stripe_md *lsm, int count,
+ struct llog_cookie *cookies, int flags)
{
return 0;
}
#endif
+
+/**
+ * Module init time fucntion. Initializes slab for llcd objects.
+ */
+int llog_recov_init(void)
+{
+ int llcd_size;
+
+ llcd_size = CFS_PAGE_SIZE -
+ lustre_msg_size(LUSTRE_MSG_MAGIC_V2, 1, NULL);
+ llcd_size += offsetof(struct llog_canceld_ctxt, llcd_cookies);
+ llcd_cache = cfs_mem_cache_create("llcd_cache", llcd_size, 0, 0);
+ if (!llcd_cache) {
+ CERROR("Error allocating llcd cache\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+/**
+ * Module fini time fucntion. Releases slab for llcd objects.
+ */
+void llog_recov_fini(void)
+{
+ /*
+ * Kill llcd cache when thread is stopped and we're sure no
+ * llcd in use left.
+ */
+ if (llcd_cache) {
+ /*
+ * In 2.6.22 cfs_mem_cache_destroy() will not return error
+ * for busy resources. Let's check it another way.
+ */
+ LASSERTF(cfs_atomic_read(&llcd_count) == 0,
+ "Can't destroy llcd cache! Number of "
+ "busy llcds: %d\n", cfs_atomic_read(&llcd_count));
+ cfs_mem_cache_destroy(llcd_cache);
+ llcd_cache = NULL;
+ }
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff