X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fldlm%2Fldlm_lockd.c;h=760feb588a4e37a9fb58c8a0f4541f115c388953;hp=18bbd2808a7f985e7df3ec78f2be34a89378257e;hb=bee9c1897677473f12c0b807edd3e8fec452bc32;hpb=abd8c6dd6fa708e8064f1095350eba23b9437b7c diff --git a/lustre/ldlm/ldlm_lockd.c b/lustre/ldlm/ldlm_lockd.c index 18bbd28..760feb5 100644 --- a/lustre/ldlm/ldlm_lockd.c +++ b/lustre/ldlm/ldlm_lockd.c @@ -27,7 +27,7 @@ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * - * Copyright (c) 2010, 2012, Intel Corporation. + * Copyright (c) 2010, 2014, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -41,12 +41,8 @@ #define DEBUG_SUBSYSTEM S_LDLM -#ifdef __KERNEL__ -# include -#else -# include -#endif - +#include +#include #include #include #include @@ -60,8 +56,6 @@ static char *ldlm_cpts; CFS_MODULE_PARM(ldlm_cpts, "s", charp, 0444, "CPU partitions ldlm threads should run on"); -extern cfs_mem_cache_t *ldlm_resource_slab; -extern cfs_mem_cache_t *ldlm_lock_slab; static struct mutex ldlm_ref_mutex; static int ldlm_refcount; @@ -95,40 +89,40 @@ static inline unsigned int ldlm_get_rq_timeout(void) struct ldlm_bl_pool { spinlock_t blp_lock; - /* - * blp_prio_list is used for callbacks that should be handled - * as a priority. It is used for LDLM_FL_DISCARD_DATA requests. - * see bug 13843 - */ - cfs_list_t blp_prio_list; - - /* - * blp_list is used for all other callbacks which are likely - * to take longer to process. - */ - cfs_list_t blp_list; - - cfs_waitq_t blp_waitq; - struct completion blp_comp; - cfs_atomic_t blp_num_threads; - cfs_atomic_t blp_busy_threads; - int blp_min_threads; - int blp_max_threads; + /* + * blp_prio_list is used for callbacks that should be handled + * as a priority. It is used for LDLM_FL_DISCARD_DATA requests. + * see bug 13843 + */ + struct list_head blp_prio_list; + + /* + * blp_list is used for all other callbacks which are likely + * to take longer to process. + */ + struct list_head blp_list; + + wait_queue_head_t blp_waitq; + struct completion blp_comp; + atomic_t blp_num_threads; + atomic_t blp_busy_threads; + int blp_min_threads; + int blp_max_threads; }; struct ldlm_bl_work_item { - cfs_list_t blwi_entry; - struct ldlm_namespace *blwi_ns; - struct ldlm_lock_desc blwi_ld; - struct ldlm_lock *blwi_lock; - cfs_list_t blwi_head; - int blwi_count; - struct completion blwi_comp; - int blwi_mode; - int blwi_mem_pressure; + struct list_head blwi_entry; + struct ldlm_namespace *blwi_ns; + struct ldlm_lock_desc blwi_ld; + struct ldlm_lock *blwi_lock; + struct list_head blwi_head; + int blwi_count; + struct completion blwi_comp; + enum ldlm_cancel_flags blwi_flags; + int blwi_mem_pressure; }; -#if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__) +#ifdef HAVE_SERVER_SUPPORT /** * Protects both waiting_locks_list and expired_lock_thread. @@ -146,14 +140,14 @@ static spinlock_t waiting_locks_spinlock; /* BH lock (timer) */ * * All access to it should be under waiting_locks_spinlock. */ -static cfs_list_t waiting_locks_list; -static cfs_timer_t waiting_locks_timer; +static struct list_head waiting_locks_list; +static struct timer_list waiting_locks_timer; static struct expired_lock_thread { - cfs_waitq_t elt_waitq; + wait_queue_head_t elt_waitq; int elt_state; int elt_dump; - cfs_list_t elt_expired_locks; + struct list_head elt_expired_locks; } expired_lock_thread; static inline int have_expired_locks(void) @@ -162,7 +156,7 @@ static inline int have_expired_locks(void) ENTRY; spin_lock_bh(&waiting_locks_spinlock); - need_to_run = !cfs_list_empty(&expired_lock_thread.elt_expired_locks); + need_to_run = !list_empty(&expired_lock_thread.elt_expired_locks); spin_unlock_bh(&waiting_locks_spinlock); RETURN(need_to_run); @@ -173,21 +167,20 @@ static inline int have_expired_locks(void) */ static int expired_lock_main(void *arg) { - cfs_list_t *expired = &expired_lock_thread.elt_expired_locks; - struct l_wait_info lwi = { 0 }; - int do_dump; + struct list_head *expired = &expired_lock_thread.elt_expired_locks; + struct l_wait_info lwi = { 0 }; + int do_dump; - ENTRY; - cfs_daemonize("ldlm_elt"); + ENTRY; - expired_lock_thread.elt_state = ELT_READY; - cfs_waitq_signal(&expired_lock_thread.elt_waitq); + expired_lock_thread.elt_state = ELT_READY; + wake_up(&expired_lock_thread.elt_waitq); - while (1) { - l_wait_event(expired_lock_thread.elt_waitq, - have_expired_locks() || - expired_lock_thread.elt_state == ELT_TERMINATE, - &lwi); + while (1) { + l_wait_event(expired_lock_thread.elt_waitq, + have_expired_locks() || + expired_lock_thread.elt_state == ELT_TERMINATE, + &lwi); spin_lock_bh(&waiting_locks_spinlock); if (expired_lock_thread.elt_dump) { @@ -202,38 +195,39 @@ static int expired_lock_main(void *arg) libcfs_run_lbug_upcall(&msgdata); spin_lock_bh(&waiting_locks_spinlock); - expired_lock_thread.elt_dump = 0; - } + expired_lock_thread.elt_dump = 0; + } - do_dump = 0; + do_dump = 0; - while (!cfs_list_empty(expired)) { - struct obd_export *export; - struct ldlm_lock *lock; + while (!list_empty(expired)) { + struct obd_export *export; + struct ldlm_lock *lock; - lock = cfs_list_entry(expired->next, struct ldlm_lock, - l_pending_chain); - if ((void *)lock < LP_POISON + CFS_PAGE_SIZE && - (void *)lock >= LP_POISON) { + lock = list_entry(expired->next, struct ldlm_lock, + l_pending_chain); + if ((void *)lock < LP_POISON + PAGE_CACHE_SIZE && + (void *)lock >= LP_POISON) { spin_unlock_bh(&waiting_locks_spinlock); - CERROR("free lock on elt list %p\n", lock); - LBUG(); - } - cfs_list_del_init(&lock->l_pending_chain); - if ((void *)lock->l_export < LP_POISON + CFS_PAGE_SIZE && - (void *)lock->l_export >= LP_POISON) { - CERROR("lock with free export on elt list %p\n", - lock->l_export); - lock->l_export = NULL; - LDLM_ERROR(lock, "free export"); - /* release extra ref grabbed by - * ldlm_add_waiting_lock() or - * ldlm_failed_ast() */ - LDLM_LOCK_RELEASE(lock); - continue; - } + CERROR("free lock on elt list %p\n", lock); + LBUG(); + } + list_del_init(&lock->l_pending_chain); + if ((void *)lock->l_export < + LP_POISON + PAGE_CACHE_SIZE && + (void *)lock->l_export >= LP_POISON) { + CERROR("lock with free export on elt list %p\n", + lock->l_export); + lock->l_export = NULL; + LDLM_ERROR(lock, "free export"); + /* release extra ref grabbed by + * ldlm_add_waiting_lock() or + * ldlm_failed_ast() */ + LDLM_LOCK_RELEASE(lock); + continue; + } - if (lock->l_destroyed) { + if (ldlm_is_destroyed(lock)) { /* release the lock refcount where * waiting_locks_callback() founds */ LDLM_LOCK_RELEASE(lock); @@ -242,6 +236,10 @@ static int expired_lock_main(void *arg) export = class_export_lock_get(lock->l_export, lock); spin_unlock_bh(&waiting_locks_spinlock); + spin_lock_bh(&export->exp_bl_list_lock); + list_del_init(&lock->l_exp_list); + spin_unlock_bh(&export->exp_bl_list_lock); + do_dump++; class_fail_export(export); class_export_lock_put(export, lock); @@ -254,18 +252,18 @@ static int expired_lock_main(void *arg) } spin_unlock_bh(&waiting_locks_spinlock); - if (do_dump && obd_dump_on_eviction) { - CERROR("dump the log upon eviction\n"); - libcfs_debug_dumplog(); - } + if (do_dump && obd_dump_on_eviction) { + CERROR("dump the log upon eviction\n"); + libcfs_debug_dumplog(); + } - if (expired_lock_thread.elt_state == ELT_TERMINATE) - break; - } + if (expired_lock_thread.elt_state == ELT_TERMINATE) + break; + } - expired_lock_thread.elt_state = ELT_STOPPED; - cfs_waitq_signal(&expired_lock_thread.elt_waitq); - RETURN(0); + expired_lock_thread.elt_state = ELT_STOPPED; + wake_up(&expired_lock_thread.elt_waitq); + RETURN(0); } static int ldlm_add_waiting_lock(struct ldlm_lock *lock); @@ -285,7 +283,7 @@ static int ldlm_lock_busy(struct ldlm_lock *lock) return 0; spin_lock_bh(&lock->l_export->exp_rpc_lock); - cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs, + list_for_each_entry(req, &lock->l_export->exp_hp_rpcs, rq_exp_list) { if (req->rq_ops->hpreq_lock_match) { match = req->rq_ops->hpreq_lock_match(req, lock); @@ -304,61 +302,14 @@ static void waiting_locks_callback(unsigned long unused) int need_dump = 0; spin_lock_bh(&waiting_locks_spinlock); - while (!cfs_list_empty(&waiting_locks_list)) { - lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock, + while (!list_empty(&waiting_locks_list)) { + lock = list_entry(waiting_locks_list.next, struct ldlm_lock, l_pending_chain); if (cfs_time_after(lock->l_callback_timeout, cfs_time_current()) || (lock->l_req_mode == LCK_GROUP)) break; - if (ptlrpc_check_suspend()) { - /* there is a case when we talk to one mds, holding - * lock from another mds. this way we easily can get - * here, if second mds is being recovered. so, we - * suspend timeouts. bug 6019 */ - - LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ", - lock->l_export->exp_client_uuid.uuid, - lock->l_export->exp_connection->c_remote_uuid.uuid, - libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid)); - - cfs_list_del_init(&lock->l_pending_chain); - if (lock->l_destroyed) { - /* relay the lock refcount decrease to - * expired lock thread */ - cfs_list_add(&lock->l_pending_chain, - &expired_lock_thread.elt_expired_locks); - } else { - __ldlm_add_waiting_lock(lock, - ldlm_get_enq_timeout(lock)); - } - continue; - } - - /* if timeout overlaps the activation time of suspended timeouts - * then extend it to give a chance for client to reconnect */ - if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout, - cfs_time_seconds(obd_timeout)/2), - ptlrpc_suspend_wakeup_time())) { - LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ", - lock->l_export->exp_client_uuid.uuid, - lock->l_export->exp_connection->c_remote_uuid.uuid, - libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid)); - - cfs_list_del_init(&lock->l_pending_chain); - if (lock->l_destroyed) { - /* relay the lock refcount decrease to - * expired lock thread */ - cfs_list_add(&lock->l_pending_chain, - &expired_lock_thread.elt_expired_locks); - } else { - __ldlm_add_waiting_lock(lock, - ldlm_get_enq_timeout(lock)); - } - continue; - } - /* Check if we need to prolong timeout */ if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT) && ldlm_lock_busy(lock)) { @@ -372,7 +323,7 @@ static void waiting_locks_callback(unsigned long unused) spin_unlock_bh(&waiting_locks_spinlock); LDLM_DEBUG(lock, "prolong the busy lock"); ldlm_refresh_waiting_lock(lock, - ldlm_get_enq_timeout(lock)); + ldlm_bl_timeout(lock) >> 1); spin_lock_bh(&waiting_locks_spinlock); if (!cont) { @@ -386,33 +337,33 @@ static void waiting_locks_callback(unsigned long unused) ldlm_lock_to_ns(lock)->ns_timeouts++; LDLM_ERROR(lock, "lock callback timer expired after %lds: " "evicting client at %s ", - cfs_time_current_sec()- lock->l_last_activity, + cfs_time_current_sec() - lock->l_last_activity, libcfs_nid2str( lock->l_export->exp_connection->c_peer.nid)); /* no needs to take an extra ref on the lock since it was in * the waiting_locks_list and ldlm_add_waiting_lock() * already grabbed a ref */ - cfs_list_del(&lock->l_pending_chain); - cfs_list_add(&lock->l_pending_chain, + list_del(&lock->l_pending_chain); + list_add(&lock->l_pending_chain, &expired_lock_thread.elt_expired_locks); need_dump = 1; } - if (!cfs_list_empty(&expired_lock_thread.elt_expired_locks)) { + if (!list_empty(&expired_lock_thread.elt_expired_locks)) { if (obd_dump_on_timeout && need_dump) expired_lock_thread.elt_dump = __LINE__; - cfs_waitq_signal(&expired_lock_thread.elt_waitq); + wake_up(&expired_lock_thread.elt_waitq); } /* * Make sure the timer will fire again if we have any locks * left. */ - if (!cfs_list_empty(&waiting_locks_list)) { + if (!list_empty(&waiting_locks_list)) { cfs_time_t timeout_rounded; - lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock, + lock = list_entry(waiting_locks_list.next, struct ldlm_lock, l_pending_chain); timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout); cfs_timer_arm(&waiting_locks_timer, timeout_rounded); @@ -437,7 +388,7 @@ static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds) cfs_time_t timeout; cfs_time_t timeout_rounded; - if (!cfs_list_empty(&lock->l_pending_chain)) + if (!list_empty(&lock->l_pending_chain)) return 0; if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) || @@ -458,48 +409,77 @@ static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds) /* if the new lock has a shorter timeout than something earlier on the list, we'll wait the longer amount of time; no big deal. */ /* FIFO */ - cfs_list_add_tail(&lock->l_pending_chain, &waiting_locks_list); + list_add_tail(&lock->l_pending_chain, &waiting_locks_list); return 1; } +static void ldlm_add_blocked_lock(struct ldlm_lock *lock) +{ + spin_lock_bh(&lock->l_export->exp_bl_list_lock); + if (list_empty(&lock->l_exp_list)) { + if (lock->l_granted_mode != lock->l_req_mode) + list_add_tail(&lock->l_exp_list, + &lock->l_export->exp_bl_list); + else + list_add(&lock->l_exp_list, + &lock->l_export->exp_bl_list); + } + spin_unlock_bh(&lock->l_export->exp_bl_list_lock); + + /* A blocked lock is added. Adjust the position in + * the stale list if the export is in the list. + * If export is stale and not in the list - it is being + * processed and will be placed on the right position + * on obd_stale_export_put(). */ + if (!list_empty(&lock->l_export->exp_stale_list)) + obd_stale_export_adjust(lock->l_export); +} + static int ldlm_add_waiting_lock(struct ldlm_lock *lock) { int ret; - int timeout = ldlm_get_enq_timeout(lock); + int timeout = ldlm_bl_timeout(lock); /* NB: must be called with hold of lock_res_and_lock() */ - LASSERT(lock->l_res_locked); - lock->l_waited = 1; + LASSERT(ldlm_is_res_locked(lock)); + LASSERT(!ldlm_is_cancel_on_block(lock)); - LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)); + /* Do not put cross-MDT lock in the waiting list, since we + * will not evict it due to timeout for now */ + if (lock->l_export != NULL && + (exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS)) + return 0; spin_lock_bh(&waiting_locks_spinlock); - if (lock->l_destroyed) { - static cfs_time_t next; + if (ldlm_is_cancel(lock)) { spin_unlock_bh(&waiting_locks_spinlock); - LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)"); - if (cfs_time_after(cfs_time_current(), next)) { - next = cfs_time_shift(14400); - libcfs_debug_dumpstack(NULL); - } - return 0; - } + return 0; + } - ret = __ldlm_add_waiting_lock(lock, timeout); - if (ret) { - /* grab ref on the lock if it has been added to the - * waiting list */ - LDLM_LOCK_GET(lock); - } - spin_unlock_bh(&waiting_locks_spinlock); + if (ldlm_is_destroyed(lock)) { + static cfs_time_t next; + + spin_unlock_bh(&waiting_locks_spinlock); + LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)"); + if (cfs_time_after(cfs_time_current(), next)) { + next = cfs_time_shift(14400); + libcfs_debug_dumpstack(NULL); + } + return 0; + } + ldlm_set_waited(lock); + lock->l_last_activity = cfs_time_current_sec(); + ret = __ldlm_add_waiting_lock(lock, timeout); if (ret) { - spin_lock_bh(&lock->l_export->exp_bl_list_lock); - if (cfs_list_empty(&lock->l_exp_list)) - cfs_list_add(&lock->l_exp_list, - &lock->l_export->exp_bl_list); - spin_unlock_bh(&lock->l_export->exp_bl_list_lock); + /* grab ref on the lock if it has been added to the + * waiting list */ + LDLM_LOCK_GET(lock); } + spin_unlock_bh(&waiting_locks_spinlock); + + if (ret) + ldlm_add_blocked_lock(lock); LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)", ret == 0 ? "not re-" : "", timeout, @@ -518,9 +498,9 @@ static int ldlm_add_waiting_lock(struct ldlm_lock *lock) */ static int __ldlm_del_waiting_lock(struct ldlm_lock *lock) { - cfs_list_t *list_next; + struct list_head *list_next; - if (cfs_list_empty(&lock->l_pending_chain)) + if (list_empty(&lock->l_pending_chain)) return 0; list_next = lock->l_pending_chain.next; @@ -531,13 +511,13 @@ static int __ldlm_del_waiting_lock(struct ldlm_lock *lock) cfs_timer_disarm(&waiting_locks_timer); } else { struct ldlm_lock *next; - next = cfs_list_entry(list_next, struct ldlm_lock, + next = list_entry(list_next, struct ldlm_lock, l_pending_chain); cfs_timer_arm(&waiting_locks_timer, round_timeout(next->l_callback_timeout)); } } - cfs_list_del_init(&lock->l_pending_chain); + list_del_init(&lock->l_pending_chain); return 1; } @@ -554,11 +534,12 @@ int ldlm_del_waiting_lock(struct ldlm_lock *lock) spin_lock_bh(&waiting_locks_spinlock); ret = __ldlm_del_waiting_lock(lock); + ldlm_clear_waited(lock); spin_unlock_bh(&waiting_locks_spinlock); /* remove the lock out of export blocking list */ spin_lock_bh(&lock->l_export->exp_bl_list_lock); - cfs_list_del_init(&lock->l_exp_list); + list_del_init(&lock->l_exp_list); spin_unlock_bh(&lock->l_export->exp_bl_list_lock); if (ret) { @@ -570,7 +551,6 @@ int ldlm_del_waiting_lock(struct ldlm_lock *lock) LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed"); return ret; } -EXPORT_SYMBOL(ldlm_del_waiting_lock); /** * Prolong the contended lock waiting time. @@ -585,9 +565,15 @@ int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout) return 0; } + if (exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) { + /* We don't have a "waiting locks list" on OSP. */ + LDLM_DEBUG(lock, "MDS-MDS lock: no-op"); + return 0; + } + spin_lock_bh(&waiting_locks_spinlock); - if (cfs_list_empty(&lock->l_pending_chain)) { + if (list_empty(&lock->l_pending_chain)) { spin_unlock_bh(&waiting_locks_spinlock); LDLM_DEBUG(lock, "wasn't waiting"); return 0; @@ -604,7 +590,7 @@ int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout) } EXPORT_SYMBOL(ldlm_refresh_waiting_lock); -#else /* !HAVE_SERVER_SUPPORT || !__KERNEL__ */ +#else /* HAVE_SERVER_SUPPORT */ int ldlm_del_waiting_lock(struct ldlm_lock *lock) { @@ -616,18 +602,34 @@ int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout) RETURN(0); } -# ifdef HAVE_SERVER_SUPPORT -static int ldlm_add_waiting_lock(struct ldlm_lock *lock) +#endif /* !HAVE_SERVER_SUPPORT */ + +#ifdef HAVE_SERVER_SUPPORT + +/** + * Calculate the per-export Blocking timeout (covering BL AST, data flush, + * lock cancel, and their replies). Used for lock callback timeout and AST + * re-send period. + * + * \param[in] lock lock which is getting the blocking callback + * + * \retval timeout in seconds to wait for the client reply + */ +unsigned int ldlm_bl_timeout(struct ldlm_lock *lock) { - LASSERT(lock->l_res_locked); - LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)); - RETURN(1); -} + unsigned int timeout; -# endif -#endif /* HAVE_SERVER_SUPPORT && __KERNEL__ */ + if (AT_OFF) + return obd_timeout / 2; -#ifdef HAVE_SERVER_SUPPORT + /* Since these are non-updating timeouts, we should be conservative. + * Take more than usually, 150% + * It would be nice to have some kind of "early reply" mechanism for + * lock callbacks too... */ + timeout = at_get(&lock->l_export->exp_bl_lock_at); + return max(timeout + (timeout >> 1), ldlm_enqueue_min); +} +EXPORT_SYMBOL(ldlm_bl_timeout); /** * Perform lock cleanup if AST sending failed. @@ -642,19 +644,15 @@ static void ldlm_failed_ast(struct ldlm_lock *lock, int rc, if (obd_dump_on_timeout) libcfs_debug_dumplog(); -#ifdef __KERNEL__ spin_lock_bh(&waiting_locks_spinlock); if (__ldlm_del_waiting_lock(lock) == 0) /* the lock was not in any list, grab an extra ref before adding * the lock to the expired list */ LDLM_LOCK_GET(lock); - cfs_list_add(&lock->l_pending_chain, + list_add(&lock->l_pending_chain, &expired_lock_thread.elt_expired_locks); - cfs_waitq_signal(&expired_lock_thread.elt_waitq); + wake_up(&expired_lock_thread.elt_waitq); spin_unlock_bh(&waiting_locks_spinlock); -#else - class_fail_export(lock->l_export); -#endif } /** @@ -664,57 +662,57 @@ static int ldlm_handle_ast_error(struct ldlm_lock *lock, struct ptlrpc_request *req, int rc, const char *ast_type) { - lnet_process_id_t peer = req->rq_import->imp_connection->c_peer; - - if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) { - LASSERT(lock->l_export); - if (lock->l_export->exp_libclient) { - LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)" - " timeout, just cancelling lock", ast_type, - libcfs_nid2str(peer.nid)); - ldlm_lock_cancel(lock); - rc = -ERESTART; - } else if (lock->l_flags & LDLM_FL_CANCEL) { - LDLM_DEBUG(lock, "%s AST timeout from nid %s, but " - "cancel was received (AST reply lost?)", - ast_type, libcfs_nid2str(peer.nid)); - ldlm_lock_cancel(lock); - rc = -ERESTART; - } else { - ldlm_del_waiting_lock(lock); - ldlm_failed_ast(lock, rc, ast_type); - } - } else if (rc) { - if (rc == -EINVAL) { - struct ldlm_resource *res = lock->l_resource; - LDLM_DEBUG(lock, "client (nid %s) returned %d" - " from %s AST - normal race", - libcfs_nid2str(peer.nid), - req->rq_repmsg ? - lustre_msg_get_status(req->rq_repmsg) : -1, - ast_type); - if (res) { - /* update lvbo to return proper attributes. - * see bug 23174 */ - ldlm_resource_getref(res); - ldlm_res_lvbo_update(res, NULL, 1); - ldlm_resource_putref(res); - } + lnet_process_id_t peer = req->rq_import->imp_connection->c_peer; + + if (!req->rq_replied || (rc && rc != -EINVAL)) { + if (lock->l_export && lock->l_export->exp_libclient) { + LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)" + " timeout, just cancelling lock", ast_type, + libcfs_nid2str(peer.nid)); + ldlm_lock_cancel(lock); + rc = -ERESTART; + } else if (ldlm_is_cancel(lock)) { + LDLM_DEBUG(lock, "%s AST timeout from nid %s, but " + "cancel was received (AST reply lost?)", + ast_type, libcfs_nid2str(peer.nid)); + ldlm_lock_cancel(lock); + rc = -ERESTART; + } else { + LDLM_ERROR(lock, "client (nid %s) %s %s AST " + "(req status %d rc %d), evict it", + libcfs_nid2str(peer.nid), + req->rq_replied ? "returned error from" : + "failed to reply to", + ast_type, + (req->rq_repmsg != NULL) ? + lustre_msg_get_status(req->rq_repmsg) : 0, + rc); + ldlm_failed_ast(lock, rc, ast_type); + } + return rc; + } - } else { - LDLM_ERROR(lock, "client (nid %s) returned %d " - "from %s AST", libcfs_nid2str(peer.nid), - (req->rq_repmsg != NULL) ? - lustre_msg_get_status(req->rq_repmsg) : 0, - ast_type); - } - ldlm_lock_cancel(lock); - /* Server-side AST functions are called from ldlm_reprocess_all, - * which needs to be told to please restart its reprocessing. */ - rc = -ERESTART; - } + if (rc == -EINVAL) { + struct ldlm_resource *res = lock->l_resource; + + LDLM_DEBUG(lock, "client (nid %s) returned %d" + " from %s AST - normal race", + libcfs_nid2str(peer.nid), + req->rq_repmsg ? + lustre_msg_get_status(req->rq_repmsg) : -1, + ast_type); + if (res) { + /* update lvbo to return proper attributes. + * see bug 23174 */ + ldlm_resource_getref(res); + ldlm_res_lvbo_update(res, NULL, 1); + ldlm_resource_putref(res); + } + ldlm_lock_cancel(lock); + rc = -ERESTART; + } - return rc; + return rc; } static int ldlm_cb_interpret(const struct lu_env *env, @@ -765,9 +763,17 @@ static int ldlm_cb_interpret(const struct lu_env *env, LDLM_LOCK_RELEASE(lock); if (rc == -ERESTART) - cfs_atomic_inc(&arg->restart); + atomic_inc(&arg->restart); - RETURN(0); + RETURN(0); +} + +static void ldlm_update_resend(struct ptlrpc_request *req, void *data) +{ + struct ldlm_cb_async_args *ca = data; + struct ldlm_lock *lock = ca->ca_lock; + + ldlm_refresh_waiting_lock(lock, ldlm_bl_timeout(lock)); } static inline int ldlm_ast_fini(struct ptlrpc_request *req, @@ -782,7 +788,7 @@ static inline int ldlm_ast_fini(struct ptlrpc_request *req, rc = ptl_send_rpc(req, 1); ptlrpc_req_finished(req); if (rc == 0) - cfs_atomic_inc(&arg->restart); + atomic_inc(&arg->restart); } else { LDLM_LOCK_GET(lock); ptlrpc_set_add_req(arg->set, req); @@ -806,12 +812,12 @@ static void ldlm_lock_reorder_req(struct ldlm_lock *lock) } spin_lock_bh(&lock->l_export->exp_rpc_lock); - cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs, - rq_exp_list) { + list_for_each_entry(req, &lock->l_export->exp_hp_rpcs, + rq_exp_list) { /* Do not process requests that were not yet added to there * incoming queue or were already removed from there for - * processing. We evaluate ptlrpc_request_reorderable() without - * holding svcpt->scp_req_lock, and then redo the checks with + * processing. We evaluate ptlrpc_nrs_req_can_move() without + * holding svcpt->scp_req_lock, and then redo the check with * the lock held once we need to obtain a reliable result. */ if (ptlrpc_nrs_req_can_move(req) && @@ -865,33 +871,34 @@ int ldlm_server_blocking_ast(struct ldlm_lock *lock, ca->ca_lock = lock; req->rq_interpret_reply = ldlm_cb_interpret; - req->rq_no_resend = 1; lock_res_and_lock(lock); - if (lock->l_granted_mode != lock->l_req_mode) { - /* this blocking AST will be communicated as part of the - * completion AST instead */ + if (ldlm_is_destroyed(lock)) { + /* What's the point? */ unlock_res_and_lock(lock); - ptlrpc_req_finished(req); - LDLM_DEBUG(lock, "lock not granted, not sending blocking AST"); RETURN(0); } - if (lock->l_destroyed) { - /* What's the point? */ + if (lock->l_granted_mode != lock->l_req_mode) { + /* this blocking AST will be communicated as part of the + * completion AST instead */ + ldlm_add_blocked_lock(lock); + ldlm_set_waited(lock); unlock_res_and_lock(lock); + ptlrpc_req_finished(req); + LDLM_DEBUG(lock, "lock not granted, not sending blocking AST"); RETURN(0); } - if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) + if (ldlm_is_cancel_on_block(lock)) instant_cancel = 1; body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ); body->lock_handle[0] = lock->l_remote_handle; body->lock_desc = *desc; - body->lock_flags |= ldlm_flags_to_wire(lock->l_flags & LDLM_AST_FLAGS); + body->lock_flags |= ldlm_flags_to_wire(lock->l_flags & LDLM_FL_AST_MASK); LDLM_DEBUG(lock, "server preparing blocking AST"); @@ -899,10 +906,16 @@ int ldlm_server_blocking_ast(struct ldlm_lock *lock, if (instant_cancel) { unlock_res_and_lock(lock); ldlm_lock_cancel(lock); + + req->rq_no_resend = 1; } else { LASSERT(lock->l_granted_mode == lock->l_req_mode); ldlm_add_waiting_lock(lock); unlock_res_and_lock(lock); + + /* Do not resend after lock callback timeout */ + req->rq_delay_limit = ldlm_bl_timeout(lock); + req->rq_resend_cb = ldlm_update_resend; } req->rq_send_state = LUSTRE_IMP_FULL; @@ -910,6 +923,8 @@ int ldlm_server_blocking_ast(struct ldlm_lock *lock, if (AT_OFF) req->rq_timeout = ldlm_get_rq_timeout(); + lock->l_last_activity = cfs_time_current_sec(); + if (lock->l_export && lock->l_export->exp_nid_stats && lock->l_export->exp_nid_stats->nid_ldlm_stats) lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats, @@ -919,7 +934,6 @@ int ldlm_server_blocking_ast(struct ldlm_lock *lock, RETURN(rc); } -EXPORT_SYMBOL(ldlm_server_blocking_ast); /** * ->l_completion_ast callback for a remote lock in server namespace. @@ -934,7 +948,6 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) struct ldlm_request *body; struct ptlrpc_request *req; struct ldlm_cb_async_args *ca; - long total_enqueue_wait; int instant_cancel = 0; int rc = 0; int lvb_len; @@ -943,8 +956,10 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) LASSERT(lock != NULL); LASSERT(data != NULL); - total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(), - lock->l_last_activity); + if (OBD_FAIL_PRECHECK(OBD_FAIL_LDLM_SRV_CP_AST)) { + LDLM_DEBUG(lock, "dropping CP AST"); + RETURN(0); + } req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse, &RQF_LDLM_CP_CALLBACK); @@ -953,6 +968,13 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) /* server namespace, doesn't need lock */ lvb_len = ldlm_lvbo_size(lock); + /* LU-3124 & LU-2187: to not return layout in completion AST because + * it may deadlock for LU-2187, or client may not have enough space + * for large layout. The layout will be returned to client with an + * extra RPC to fetch xattr.lov */ + if (ldlm_has_layout(lock)) + lvb_len = 0; + req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT, lvb_len); rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK); if (rc) { @@ -966,7 +988,6 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) ca->ca_lock = lock; req->rq_interpret_reply = ldlm_cb_interpret; - req->rq_no_resend = 1; body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ); body->lock_handle[0] = lock->l_remote_handle; @@ -992,23 +1013,9 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) } } - LDLM_DEBUG(lock, "server preparing completion AST (after %lds wait)", - total_enqueue_wait); + lock->l_last_activity = cfs_time_current_sec(); - /* Server-side enqueue wait time estimate, used in - __ldlm_add_waiting_lock to set future enqueue timers */ - if (total_enqueue_wait < ldlm_get_enq_timeout(lock)) - at_measured(ldlm_lock_to_ns_at(lock), - total_enqueue_wait); - else - /* bz18618. Don't add lock enqueue time we spend waiting for a - previous callback to fail. Locks waiting legitimately will - get extended by ldlm_refresh_waiting_lock regardless of the - estimate, so it's okay to underestimate here. */ - LDLM_DEBUG(lock, "lock completed after %lus; estimate was %ds. " - "It is likely that a previous callback timed out.", - total_enqueue_wait, - at_get(ldlm_lock_to_ns_at(lock))); + LDLM_DEBUG(lock, "server preparing completion AST"); ptlrpc_request_set_replen(req); @@ -1019,11 +1026,11 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) /* We only send real blocking ASTs after the lock is granted */ lock_res_and_lock(lock); - if (lock->l_flags & LDLM_FL_AST_SENT) { + if (ldlm_is_ast_sent(lock)) { body->lock_flags |= ldlm_flags_to_wire(LDLM_FL_AST_SENT); /* Copy AST flags like LDLM_FL_DISCARD_DATA. */ body->lock_flags |= ldlm_flags_to_wire(lock->l_flags & - LDLM_AST_FLAGS); + LDLM_FL_AST_MASK); /* We might get here prior to ldlm_handle_enqueue setting * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock @@ -1031,15 +1038,21 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) * ldlm_handle_enqueue will call ldlm_lock_cancel() still, * that would not only cancel the lock, but will also remove * it from waiting list */ - if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) { - unlock_res_and_lock(lock); - ldlm_lock_cancel(lock); - instant_cancel = 1; - lock_res_and_lock(lock); - } else { - /* start the lock-timeout clock */ - ldlm_add_waiting_lock(lock); - } + if (ldlm_is_cancel_on_block(lock)) { + unlock_res_and_lock(lock); + ldlm_lock_cancel(lock); + + instant_cancel = 1; + req->rq_no_resend = 1; + + lock_res_and_lock(lock); + } else { + /* start the lock-timeout clock */ + ldlm_add_waiting_lock(lock); + /* Do not resend after lock callback timeout */ + req->rq_delay_limit = ldlm_bl_timeout(lock); + req->rq_resend_cb = ldlm_update_resend; + } } unlock_res_and_lock(lock); @@ -1052,7 +1065,6 @@ int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data) RETURN(lvb_len < 0 ? lvb_len : rc); } -EXPORT_SYMBOL(ldlm_server_completion_ast); /** * Server side ->l_glimpse_ast handler for client locks. @@ -1111,6 +1123,8 @@ int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data) if (AT_OFF) req->rq_timeout = ldlm_get_rq_timeout(); + lock->l_last_activity = cfs_time_current_sec(); + req->rq_interpret_reply = ldlm_cb_interpret; if (lock->l_export && lock->l_export->exp_nid_stats && @@ -1122,9 +1136,9 @@ int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data) RETURN(rc); } -EXPORT_SYMBOL(ldlm_server_glimpse_ast); -int ldlm_glimpse_locks(struct ldlm_resource *res, cfs_list_t *gl_work_list) +int ldlm_glimpse_locks(struct ldlm_resource *res, + struct list_head *gl_work_list) { int rc; ENTRY; @@ -1193,24 +1207,25 @@ static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req, * service threads to carry out client lock enqueueing requests. */ int ldlm_handle_enqueue0(struct ldlm_namespace *ns, - struct ptlrpc_request *req, - const struct ldlm_request *dlm_req, - const struct ldlm_callback_suite *cbs) + struct ptlrpc_request *req, + const struct ldlm_request *dlm_req, + const struct ldlm_callback_suite *cbs) { - struct ldlm_reply *dlm_rep; + struct ldlm_reply *dlm_rep; __u64 flags; - ldlm_error_t err = ELDLM_OK; - struct ldlm_lock *lock = NULL; - void *cookie = NULL; - int rc = 0; - ENTRY; + enum ldlm_error err = ELDLM_OK; + struct ldlm_lock *lock = NULL; + void *cookie = NULL; + int rc = 0; + struct ldlm_resource *res = NULL; + ENTRY; - LDLM_DEBUG_NOLOCK("server-side enqueue handler START"); + LDLM_DEBUG_NOLOCK("server-side enqueue handler START"); - ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF); + ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF, LATF_SKIP); flags = ldlm_flags_from_wire(dlm_req->lock_flags); - LASSERT(req->rq_export); + LASSERT(req->rq_export); if (ptlrpc_req2svc(req)->srv_stats != NULL) ldlm_svc_get_eopc(dlm_req, ptlrpc_req2svc(req)->srv_stats); @@ -1267,7 +1282,8 @@ int ldlm_handle_enqueue0(struct ldlm_namespace *ns, } #endif - if (unlikely(flags & LDLM_FL_REPLAY)) { + if (unlikely((flags & LDLM_FL_REPLAY) || + (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))) { /* Find an existing lock in the per-export lock hash */ /* In the function below, .hs_keycmp resolves to * ldlm_export_lock_keycmp() */ @@ -1277,22 +1293,47 @@ int ldlm_handle_enqueue0(struct ldlm_namespace *ns, if (lock != NULL) { DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie " LPX64, lock->l_handle.h_cookie); + flags |= LDLM_FL_RESENT; GOTO(existing_lock, rc = 0); - } - } + } + } else { + if (ldlm_reclaim_full()) { + DEBUG_REQ(D_DLMTRACE, req, "Too many granted locks, " + "reject current enqueue request and let the " + "client retry later.\n"); + GOTO(out, rc = -EINPROGRESS); + } + } - /* The lock's callback data might be set in the policy function */ - lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name, - dlm_req->lock_desc.l_resource.lr_type, - dlm_req->lock_desc.l_req_mode, + /* The lock's callback data might be set in the policy function */ + lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name, + dlm_req->lock_desc.l_resource.lr_type, + dlm_req->lock_desc.l_req_mode, cbs, NULL, 0, LVB_T_NONE); - if (!lock) - GOTO(out, rc = -ENOMEM); + if (IS_ERR(lock)) { + rc = PTR_ERR(lock); + lock = NULL; + GOTO(out, rc); + } - lock->l_last_activity = cfs_time_current_sec(); lock->l_remote_handle = dlm_req->lock_handle[0]; LDLM_DEBUG(lock, "server-side enqueue handler, new lock created"); + /* Initialize resource lvb but not for a lock being replayed since + * Client already got lvb sent in this case. + * This must occur early since some policy methods assume resource + * lvb is available (lr_lvb_data != NULL). + */ + res = lock->l_resource; + if (!(flags & LDLM_FL_REPLAY)) { + /* non-replayed lock, delayed lvb init may need to be done */ + rc = ldlm_lvbo_init(res); + if (rc < 0) { + LDLM_DEBUG(lock, "delayed lvb init failed (rc %d)", rc); + GOTO(out, rc); + } + } + OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2); /* Don't enqueue a lock onto the export if it is been disonnected * due to eviction (bug 3822) or server umount (bug 24324). @@ -1309,6 +1350,11 @@ int ldlm_handle_enqueue0(struct ldlm_namespace *ns, &lock->l_remote_handle, &lock->l_exp_hash); + /* Inherit the enqueue flags before the operation, because we do not + * keep the res lock on return and next operations (BL AST) may proceed + * without them. */ + lock->l_flags |= ldlm_flags_from_wire(dlm_req->lock_flags & + LDLM_FL_INHERIT_MASK); existing_lock: if (flags & LDLM_FL_HAS_INTENT) { @@ -1339,24 +1385,28 @@ existing_lock: lock->l_req_extent = lock->l_policy_data.l_extent; err = ldlm_lock_enqueue(ns, &lock, cookie, &flags); - if (err) - GOTO(out, err); + if (err) { + if ((int)err < 0) + rc = (int)err; + GOTO(out, err); + } dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP); - dlm_rep->lock_flags = ldlm_flags_to_wire(flags); ldlm_lock2desc(lock, &dlm_rep->lock_desc); ldlm_lock2handle(lock, &dlm_rep->lock_handle); + if (lock && lock->l_resource->lr_type == LDLM_EXTENT) + OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_BL_EVICT, 6); + /* We never send a blocking AST until the lock is granted, but * we can tell it right now */ lock_res_and_lock(lock); /* Now take into account flags to be inherited from original lock request both in reply to client and in our own lock flags. */ - dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS; - lock->l_flags |= ldlm_flags_from_wire(dlm_req->lock_flags & - LDLM_INHERIT_FLAGS); + dlm_rep->lock_flags = ldlm_flags_to_wire(flags); + lock->l_flags |= flags & LDLM_FL_INHERIT_MASK; /* Don't move a pending lock onto the export if it has already been * disconnected due to eviction (bug 5683) or server umount (bug 24324). @@ -1365,7 +1415,7 @@ existing_lock: OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) { LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export); rc = -ENOTCONN; - } else if (lock->l_flags & LDLM_FL_AST_SENT) { + } else if (ldlm_is_ast_sent(lock)) { dlm_rep->lock_flags |= ldlm_flags_to_wire(LDLM_FL_AST_SENT); if (lock->l_granted_mode == lock->l_req_mode) { /* @@ -1388,7 +1438,7 @@ existing_lock: if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN || dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) && req->rq_export->exp_libclient) { - if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) || + if (unlikely(!ldlm_is_cancel_on_block(lock) || !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){ CERROR("Granting sync lock to libclient. " "req fl %d, rep fl %d, lock fl "LPX64"\n", @@ -1421,11 +1471,11 @@ existing_lock: /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this * ldlm_reprocess_all. If this moves, revisit that code. -phil */ - if (lock) { - LDLM_DEBUG(lock, "server-side enqueue handler, sending reply" - "(err=%d, rc=%d)", err, rc); + if (lock != NULL) { + LDLM_DEBUG(lock, "server-side enqueue handler, sending reply" + "(err=%d, rc=%d)", err, rc); - if (rc == 0) { + if (rc == 0) { if (req_capsule_has_field(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER) && ldlm_lvbo_size(lock) > 0) { @@ -1438,20 +1488,44 @@ existing_lock: req, lock); buflen = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER); - buflen = ldlm_lvbo_fill(lock, buf, buflen); - if (buflen >= 0) - req_capsule_shrink(&req->rq_pill, - &RMF_DLM_LVB, - buflen, RCL_SERVER); - else + /* non-replayed lock, delayed lvb init may + * need to be occur now */ + if ((buflen > 0) && !(flags & LDLM_FL_REPLAY)) { + buflen = ldlm_lvbo_fill(lock, buf, + buflen); + if (buflen >= 0) + req_capsule_shrink( + &req->rq_pill, + &RMF_DLM_LVB, + buflen, RCL_SERVER); + else + rc = buflen; + } else if (flags & LDLM_FL_REPLAY) { + /* no LVB resend upon replay */ + if (buflen > 0) + req_capsule_shrink( + &req->rq_pill, + &RMF_DLM_LVB, + 0, RCL_SERVER); + else + rc = buflen; + } else { rc = buflen; + } } - } else { - lock_res_and_lock(lock); - ldlm_resource_unlink_lock(lock); - ldlm_lock_destroy_nolock(lock); - unlock_res_and_lock(lock); - } + } + + if (rc != 0) { + if (lock->l_export) { + ldlm_lock_cancel(lock); + } else { + lock_res_and_lock(lock); + ldlm_resource_unlink_lock(lock); + ldlm_lock_destroy_nolock(lock); + unlock_res_and_lock(lock); + + } + } if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK) ldlm_reprocess_all(lock->l_resource); @@ -1464,7 +1538,6 @@ existing_lock: return rc; } -EXPORT_SYMBOL(ldlm_handle_enqueue0); /** * Old-style LDLM main entry point for server code enqueue. @@ -1491,7 +1564,6 @@ int ldlm_handle_enqueue(struct ptlrpc_request *req, } return rc; } -EXPORT_SYMBOL(ldlm_handle_enqueue); /** * Main LDLM entry point for server code to process lock conversion requests. @@ -1518,13 +1590,12 @@ int ldlm_handle_convert0(struct ptlrpc_request *req, lock = ldlm_handle2lock(&dlm_req->lock_handle[0]); if (!lock) { - req->rq_status = EINVAL; + req->rq_status = LUSTRE_EINVAL; } else { void *res = NULL; LDLM_DEBUG(lock, "server-side convert handler START"); - lock->l_last_activity = cfs_time_current_sec(); res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode, &dlm_rep->lock_flags); if (res) { @@ -1532,7 +1603,7 @@ int ldlm_handle_convert0(struct ptlrpc_request *req, LDLM_DEBUG(lock, "converted waiting lock"); req->rq_status = 0; } else { - req->rq_status = EDEADLOCK; + req->rq_status = LUSTRE_EDEADLK; } } @@ -1546,7 +1617,6 @@ int ldlm_handle_convert0(struct ptlrpc_request *req, RETURN(0); } -EXPORT_SYMBOL(ldlm_handle_convert0); /** * Old-style main LDLM entry point for server code to process lock conversion @@ -1566,7 +1636,6 @@ int ldlm_handle_convert(struct ptlrpc_request *req) } return rc; } -EXPORT_SYMBOL(ldlm_handle_convert); /** * Cancel all the locks whose handles are packed into ldlm_request @@ -1575,7 +1644,8 @@ EXPORT_SYMBOL(ldlm_handle_convert); * requests. */ int ldlm_request_cancel(struct ptlrpc_request *req, - const struct ldlm_request *dlm_req, int first) + const struct ldlm_request *dlm_req, + int first, enum lustre_at_flags flags) { struct ldlm_resource *res, *pres = NULL; struct ldlm_lock *lock; @@ -1625,6 +1695,14 @@ int ldlm_request_cancel(struct ptlrpc_request *req, } pres = res; } + + if ((flags & LATF_STATS) && ldlm_is_ast_sent(lock)) { + long delay = cfs_time_sub(cfs_time_current_sec(), + lock->l_last_activity); + LDLM_DEBUG(lock, "server cancels blocked lock after " + CFS_DURATION_T"s", delay); + at_measured(&lock->l_export->exp_bl_lock_at, delay); + } ldlm_lock_cancel(lock); LDLM_LOCK_PUT(lock); } @@ -1664,12 +1742,11 @@ int ldlm_handle_cancel(struct ptlrpc_request *req) if (rc) RETURN(rc); - if (!ldlm_request_cancel(req, dlm_req, 0)) - req->rq_status = ESTALE; + if (!ldlm_request_cancel(req, dlm_req, 0, LATF_STATS)) + req->rq_status = LUSTRE_ESTALE; RETURN(ptlrpc_reply(req)); } -EXPORT_SYMBOL(ldlm_handle_cancel); #endif /* HAVE_SERVER_SUPPORT */ /** @@ -1686,10 +1763,10 @@ void ldlm_handle_bl_callback(struct ldlm_namespace *ns, LDLM_DEBUG(lock, "client blocking AST callback handler"); lock_res_and_lock(lock); - lock->l_flags |= LDLM_FL_CBPENDING; + ldlm_set_cbpending(lock); - if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) - lock->l_flags |= LDLM_FL_CANCEL; + if (ldlm_is_cancel_on_block(lock)) + ldlm_set_cancel(lock); do_ast = (!lock->l_readers && !lock->l_writers); unlock_res_and_lock(lock); @@ -1720,23 +1797,24 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req, struct ldlm_request *dlm_req, struct ldlm_lock *lock) { + struct list_head ast_list; int lvb_len; - CFS_LIST_HEAD(ast_list); int rc = 0; - ENTRY; + ENTRY; - LDLM_DEBUG(lock, "client completion callback handler START"); + LDLM_DEBUG(lock, "client completion callback handler START"); - if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) { - int to = cfs_time_seconds(1); - while (to > 0) { - cfs_schedule_timeout_and_set_state( - CFS_TASK_INTERRUPTIBLE, to); - if (lock->l_granted_mode == lock->l_req_mode || - lock->l_destroyed) - break; - } - } + INIT_LIST_HEAD(&ast_list); + if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) { + int to = cfs_time_seconds(1); + while (to > 0) { + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(to); + if (lock->l_granted_mode == lock->l_req_mode || + ldlm_is_destroyed(lock)) + break; + } + } lvb_len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT); if (lvb_len < 0) { @@ -1754,47 +1832,32 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req, lock->l_lvb_len, lvb_len); GOTO(out, rc = -EINVAL); } - } else if (ldlm_has_layout(lock)) { /* for layout lock, lvb has - * variable length */ - void *lvb_data; - - OBD_ALLOC(lvb_data, lvb_len); - if (lvb_data == NULL) { - LDLM_ERROR(lock, "No memory: %d.\n", lvb_len); - GOTO(out, rc = -ENOMEM); - } - - lock_res_and_lock(lock); - LASSERT(lock->l_lvb_data == NULL); - lock->l_lvb_data = lvb_data; - lock->l_lvb_len = lvb_len; - unlock_res_and_lock(lock); } } - lock_res_and_lock(lock); - if (lock->l_destroyed || - lock->l_granted_mode == lock->l_req_mode) { - /* bug 11300: the lock has already been granted */ - unlock_res_and_lock(lock); - LDLM_DEBUG(lock, "Double grant race happened"); + lock_res_and_lock(lock); + if (ldlm_is_destroyed(lock) || + lock->l_granted_mode == lock->l_req_mode) { + /* bug 11300: the lock has already been granted */ + unlock_res_and_lock(lock); + LDLM_DEBUG(lock, "Double grant race happened"); GOTO(out, rc = 0); - } + } - /* If we receive the completion AST before the actual enqueue returned, - * then we might need to switch lock modes, resources, or extents. */ - if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) { - lock->l_req_mode = dlm_req->lock_desc.l_granted_mode; - LDLM_DEBUG(lock, "completion AST, new lock mode"); - } + /* If we receive the completion AST before the actual enqueue returned, + * then we might need to switch lock modes, resources, or extents. */ + if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) { + lock->l_req_mode = dlm_req->lock_desc.l_granted_mode; + LDLM_DEBUG(lock, "completion AST, new lock mode"); + } - if (lock->l_resource->lr_type != LDLM_PLAIN) { - ldlm_convert_policy_to_local(req->rq_export, - dlm_req->lock_desc.l_resource.lr_type, - &dlm_req->lock_desc.l_policy_data, - &lock->l_policy_data); - LDLM_DEBUG(lock, "completion AST, new policy data"); - } + if (lock->l_resource->lr_type != LDLM_PLAIN) { + ldlm_convert_policy_to_local(req->rq_export, + dlm_req->lock_desc.l_resource.lr_type, + &dlm_req->lock_desc.l_policy_data, + &lock->l_policy_data); + LDLM_DEBUG(lock, "completion AST, new policy data"); + } ldlm_resource_unlink_lock(lock); if (memcmp(&dlm_req->lock_desc.l_resource.lr_name, @@ -1816,7 +1879,7 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req, /* BL_AST locks are not needed in LRU. * Let ldlm_cancel_lru() be fast. */ ldlm_lock_remove_from_lru(lock); - lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST; + lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST; LDLM_DEBUG(lock, "completion AST includes blocking AST"); } @@ -1847,9 +1910,9 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req, out: if (rc < 0) { lock_res_and_lock(lock); - lock->l_flags |= LDLM_FL_FAILED; + ldlm_set_failed(lock); unlock_res_and_lock(lock); - cfs_waitq_signal(&lock->l_waitq); + wake_up(&lock->l_waitq); } LDLM_LOCK_RELEASE(lock); } @@ -1913,53 +1976,53 @@ static int ldlm_callback_reply(struct ptlrpc_request *req, int rc) return ptlrpc_reply(req); } -#ifdef __KERNEL__ -static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode) +static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, + enum ldlm_cancel_flags cancel_flags) { struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool; ENTRY; spin_lock(&blp->blp_lock); if (blwi->blwi_lock && - blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) { + ldlm_is_discard_data(blwi->blwi_lock)) { /* add LDLM_FL_DISCARD_DATA requests to the priority list */ - cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list); + list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list); } else { /* other blocking callbacks are added to the regular list */ - cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list); + list_add_tail(&blwi->blwi_entry, &blp->blp_list); } spin_unlock(&blp->blp_lock); - cfs_waitq_signal(&blp->blp_waitq); + wake_up(&blp->blp_waitq); - /* can not use blwi->blwi_mode as blwi could be already freed in - LDLM_ASYNC mode */ - if (mode == LDLM_SYNC) + /* can not check blwi->blwi_flags as blwi could be already freed in + LCF_ASYNC mode */ + if (!(cancel_flags & LCF_ASYNC)) wait_for_completion(&blwi->blwi_comp); RETURN(0); } static inline void init_blwi(struct ldlm_bl_work_item *blwi, - struct ldlm_namespace *ns, - struct ldlm_lock_desc *ld, - cfs_list_t *cancels, int count, - struct ldlm_lock *lock, - int mode) + struct ldlm_namespace *ns, + struct ldlm_lock_desc *ld, + struct list_head *cancels, int count, + struct ldlm_lock *lock, + enum ldlm_cancel_flags cancel_flags) { init_completion(&blwi->blwi_comp); - CFS_INIT_LIST_HEAD(&blwi->blwi_head); + INIT_LIST_HEAD(&blwi->blwi_head); - if (cfs_memory_pressure_get()) + if (memory_pressure_get()) blwi->blwi_mem_pressure = 1; blwi->blwi_ns = ns; - blwi->blwi_mode = mode; + blwi->blwi_flags = cancel_flags; if (ld != NULL) blwi->blwi_ld = *ld; if (count) { - cfs_list_add(&blwi->blwi_head, cancels); - cfs_list_del_init(cancels); + list_add(&blwi->blwi_head, cancels); + list_del_init(cancels); blwi->blwi_count = count; } else { blwi->blwi_lock = lock; @@ -1976,53 +2039,55 @@ static inline void init_blwi(struct ldlm_bl_work_item *blwi, * call ->l_blocking_ast itself. */ static int ldlm_bl_to_thread(struct ldlm_namespace *ns, - struct ldlm_lock_desc *ld, struct ldlm_lock *lock, - cfs_list_t *cancels, int count, int mode) + struct ldlm_lock_desc *ld, + struct ldlm_lock *lock, + struct list_head *cancels, int count, + enum ldlm_cancel_flags cancel_flags) { - ENTRY; + ENTRY; - if (cancels && count == 0) - RETURN(0); + if (cancels && count == 0) + RETURN(0); - if (mode == LDLM_SYNC) { - /* if it is synchronous call do minimum mem alloc, as it could - * be triggered from kernel shrinker - */ - struct ldlm_bl_work_item blwi; - memset(&blwi, 0, sizeof(blwi)); - init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC); - RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC)); - } else { - struct ldlm_bl_work_item *blwi; - OBD_ALLOC(blwi, sizeof(*blwi)); - if (blwi == NULL) - RETURN(-ENOMEM); - init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC); + if (cancel_flags & LCF_ASYNC) { + struct ldlm_bl_work_item *blwi; - RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC)); - } + OBD_ALLOC(blwi, sizeof(*blwi)); + if (blwi == NULL) + RETURN(-ENOMEM); + init_blwi(blwi, ns, ld, cancels, count, lock, cancel_flags); + + RETURN(__ldlm_bl_to_thread(blwi, cancel_flags)); + } else { + /* if it is synchronous call do minimum mem alloc, as it could + * be triggered from kernel shrinker + */ + struct ldlm_bl_work_item blwi; + + memset(&blwi, 0, sizeof(blwi)); + init_blwi(&blwi, ns, ld, cancels, count, lock, cancel_flags); + RETURN(__ldlm_bl_to_thread(&blwi, cancel_flags)); + } } -#endif int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld, - struct ldlm_lock *lock) + struct ldlm_lock *lock) { -#ifdef __KERNEL__ - RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC)); -#else - RETURN(-ENOSYS); -#endif + return ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LCF_ASYNC); } int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld, - cfs_list_t *cancels, int count, int mode) + struct list_head *cancels, int count, + enum ldlm_cancel_flags cancel_flags) { -#ifdef __KERNEL__ - RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode)); -#else - RETURN(-ENOSYS); -#endif + return ldlm_bl_to_thread(ns, ld, NULL, cancels, count, cancel_flags); +} + +int ldlm_bl_thread_wakeup(void) +{ + wake_up(&ldlm_state->ldlm_bl_pool->blp_waitq); + return 0; } /* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */ @@ -2083,21 +2148,6 @@ static inline void ldlm_callback_errmsg(struct ptlrpc_request *req, CWARN("Send reply failed, maybe cause bug 21636.\n"); } -static int ldlm_handle_qc_callback(struct ptlrpc_request *req) -{ - struct obd_quotactl *oqctl; - struct client_obd *cli = &req->rq_export->exp_obd->u.cli; - - oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL); - if (oqctl == NULL) { - CERROR("Can't unpack obd_quotactl\n"); - RETURN(-EPROTO); - } - - cli->cl_qchk_stat = oqctl->qc_stat; - return 0; -} - /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */ static int ldlm_callback_handler(struct ptlrpc_request *req) { @@ -2130,8 +2180,11 @@ static int ldlm_callback_handler(struct ptlrpc_request *req) switch (lustre_msg_get_opc(req->rq_reqmsg)) { case LDLM_BL_CALLBACK: - if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET)) + if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET)) { + if (cfs_fail_err) + ldlm_callback_reply(req, -(int)cfs_fail_err); RETURN(0); + } break; case LDLM_CP_CALLBACK: if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK_NET)) @@ -2145,16 +2198,6 @@ static int ldlm_callback_handler(struct ptlrpc_request *req) rc = ldlm_handle_setinfo(req); ldlm_callback_reply(req, rc); RETURN(0); - case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */ - CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n"); - req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL); - if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET)) - RETURN(0); - rc = llog_origin_handle_cancel(req); - if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP)) - RETURN(0); - ldlm_callback_reply(req, rc); - RETURN(0); case LLOG_ORIGIN_HANDLE_CREATE: req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE); if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET)) @@ -2184,13 +2227,6 @@ static int ldlm_callback_handler(struct ptlrpc_request *req) rc = llog_origin_handle_close(req); ldlm_callback_reply(req, rc); RETURN(0); - case OBD_QC_CALLBACK: - req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK); - if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET)) - RETURN(0); - rc = ldlm_handle_qc_callback(req); - ldlm_callback_reply(req, rc); - RETURN(0); default: CERROR("unknown opcode %u\n", lustre_msg_get_opc(req->rq_reqmsg)); @@ -2215,7 +2251,7 @@ static int ldlm_callback_handler(struct ptlrpc_request *req) * which the server has already started a blocking callback on. */ if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) && lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) { - rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]); + rc = ldlm_cli_cancel(&dlm_req->lock_handle[0], 0); if (rc < 0) CERROR("ldlm_cli_cancel: %d\n", rc); } @@ -2230,22 +2266,21 @@ static int ldlm_callback_handler(struct ptlrpc_request *req) RETURN(0); } - if ((lock->l_flags & LDLM_FL_FAIL_LOC) && + if (ldlm_is_fail_loc(lock) && lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE); /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */ lock_res_and_lock(lock); lock->l_flags |= ldlm_flags_from_wire(dlm_req->lock_flags & - LDLM_AST_FLAGS); + LDLM_FL_AST_MASK); if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) { /* If somebody cancels lock and cache is already dropped, * or lock is failed before cp_ast received on client, * we can tell the server we have no lock. Otherwise, we * should send cancel after dropping the cache. */ - if (((lock->l_flags & LDLM_FL_CANCELING) && - (lock->l_flags & LDLM_FL_BL_DONE)) || - (lock->l_flags & LDLM_FL_FAILED)) { + if ((ldlm_is_canceling(lock) && ldlm_is_bl_done(lock)) || + ldlm_is_failed(lock)) { LDLM_DEBUG(lock, "callback on lock " LPX64" - lock disappeared\n", dlm_req->lock_handle[0].cookie); @@ -2259,7 +2294,7 @@ static int ldlm_callback_handler(struct ptlrpc_request *req) /* BL_AST locks are not needed in LRU. * Let ldlm_cancel_lru() be fast. */ ldlm_lock_remove_from_lru(lock); - lock->l_flags |= LDLM_FL_BL_AST; + ldlm_set_bl_ast(lock); } unlock_res_and_lock(lock); @@ -2276,7 +2311,7 @@ static int ldlm_callback_handler(struct ptlrpc_request *req) case LDLM_BL_CALLBACK: CDEBUG(D_INODE, "blocking ast\n"); req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK); - if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) { + if (!ldlm_is_cancel_on_block(lock)) { rc = ldlm_callback_reply(req, 0); if (req->rq_no_reply || rc) ldlm_callback_errmsg(req, "Normal process", rc, @@ -2350,21 +2385,13 @@ static int ldlm_cancel_handler(struct ptlrpc_request *req) req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL); CDEBUG(D_INODE, "cancel\n"); if (CFS_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET) || - CFS_FAIL_CHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND)) + CFS_FAIL_CHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND) || + CFS_FAIL_CHECK(OBD_FAIL_LDLM_BL_EVICT)) RETURN(0); rc = ldlm_handle_cancel(req); if (rc) break; RETURN(0); - case OBD_LOG_CANCEL: - req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL); - if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET)) - RETURN(0); - rc = llog_origin_handle_cancel(req); - if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP)) - RETURN(0); - ldlm_callback_reply(req, rc); - RETURN(0); default: CERROR("invalid opcode %d\n", lustre_msg_get_opc(req->rq_reqmsg)); @@ -2426,7 +2453,7 @@ static int ldlm_cancel_hpreq_check(struct ptlrpc_request *req) if (lock == NULL) continue; - rc = !!(lock->l_flags & LDLM_FL_AST_SENT); + rc = ldlm_is_ast_sent(lock) ? 1 : 0; if (rc) LDLM_DEBUG(lock, "hpreq cancel lock"); LDLM_LOCK_PUT(lock); @@ -2460,11 +2487,11 @@ static int ldlm_hpreq_handler(struct ptlrpc_request *req) RETURN(0); } -int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd, - cfs_hlist_node_t *hnode, void *data) +static int ldlm_revoke_lock_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd, + struct hlist_node *hnode, void *data) { - cfs_list_t *rpc_list = data; + struct list_head *rpc_list = data; struct ldlm_lock *lock = cfs_hash_object(hs, hnode); lock_res_and_lock(lock); @@ -2481,7 +2508,7 @@ int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd, return 0; } - if (lock->l_flags & LDLM_FL_AST_SENT) { + if (ldlm_is_ast_sent(lock)) { unlock_res_and_lock(lock); return 0; } @@ -2489,7 +2516,7 @@ int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd, LASSERT(lock->l_blocking_ast); LASSERT(!lock->l_blocking_lock); - lock->l_flags |= LDLM_FL_AST_SENT; + ldlm_set_ast_sent(lock); if (lock->l_export && lock->l_export->exp_lock_hash) { /* NB: it's safe to call cfs_hash_del() even lock isn't * in exp_lock_hash. */ @@ -2500,7 +2527,7 @@ int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd, &lock->l_remote_handle, &lock->l_exp_hash); } - cfs_list_add_tail(&lock->l_rk_ast, rpc_list); + list_add_tail(&lock->l_rk_ast, rpc_list); LDLM_LOCK_GET(lock); unlock_res_and_lock(lock); @@ -2509,10 +2536,10 @@ int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd, void ldlm_revoke_export_locks(struct obd_export *exp) { - cfs_list_t rpc_list; + struct list_head rpc_list; ENTRY; - CFS_INIT_LIST_HEAD(&rpc_list); + INIT_LIST_HEAD(&rpc_list); cfs_hash_for_each_empty(exp->exp_lock_hash, ldlm_revoke_lock_cb, &rpc_list); ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list, @@ -2523,32 +2550,52 @@ void ldlm_revoke_export_locks(struct obd_export *exp) EXPORT_SYMBOL(ldlm_revoke_export_locks); #endif /* HAVE_SERVER_SUPPORT */ -#ifdef __KERNEL__ -static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp) +static int ldlm_bl_get_work(struct ldlm_bl_pool *blp, + struct ldlm_bl_work_item **p_blwi, + struct obd_export **p_exp) { struct ldlm_bl_work_item *blwi = NULL; static unsigned int num_bl = 0; + static unsigned int num_stale; + int num_th = atomic_read(&blp->blp_num_threads); + + *p_exp = obd_stale_export_get(); spin_lock(&blp->blp_lock); - /* process a request from the blp_list at least every blp_num_threads */ - if (!cfs_list_empty(&blp->blp_list) && - (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0)) - blwi = cfs_list_entry(blp->blp_list.next, - struct ldlm_bl_work_item, blwi_entry); - else - if (!cfs_list_empty(&blp->blp_prio_list)) - blwi = cfs_list_entry(blp->blp_prio_list.next, - struct ldlm_bl_work_item, - blwi_entry); - - if (blwi) { - if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads)) - num_bl = 0; - cfs_list_del(&blwi->blwi_entry); - } + if (*p_exp != NULL) { + if (num_th == 1 || ++num_stale < num_th) { + spin_unlock(&blp->blp_lock); + return 1; + } else { + num_stale = 0; + } + } + + /* process a request from the blp_list at least every blp_num_threads */ + if (!list_empty(&blp->blp_list) && + (list_empty(&blp->blp_prio_list) || num_bl == 0)) + blwi = list_entry(blp->blp_list.next, + struct ldlm_bl_work_item, blwi_entry); + else + if (!list_empty(&blp->blp_prio_list)) + blwi = list_entry(blp->blp_prio_list.next, + struct ldlm_bl_work_item, + blwi_entry); + + if (blwi) { + if (++num_bl >= num_th) + num_bl = 0; + list_del(&blwi->blwi_entry); + } spin_unlock(&blp->blp_lock); + *p_blwi = blwi; + + if (*p_exp != NULL && *p_blwi != NULL) { + obd_stale_export_put(*p_exp); + *p_exp = NULL; + } - return blwi; + return (*p_blwi != NULL || *p_exp != NULL) ? 1 : 0; } /* This only contains temporary data until the thread starts */ @@ -2564,20 +2611,106 @@ static int ldlm_bl_thread_main(void *arg); static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp) { struct ldlm_bl_thread_data bltd = { .bltd_blp = blp }; - int rc; + struct task_struct *task; init_completion(&bltd.bltd_comp); - rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0); - if (rc < 0) { - CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n", - cfs_atomic_read(&blp->blp_num_threads), rc); - return rc; + bltd.bltd_num = atomic_read(&blp->blp_num_threads); + snprintf(bltd.bltd_name, sizeof(bltd.bltd_name) - 1, + "ldlm_bl_%02d", bltd.bltd_num); + task = kthread_run(ldlm_bl_thread_main, &bltd, bltd.bltd_name); + if (IS_ERR(task)) { + CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %ld\n", + atomic_read(&blp->blp_num_threads), PTR_ERR(task)); + return PTR_ERR(task); } wait_for_completion(&bltd.bltd_comp); return 0; } +/* Not fatal if racy and have a few too many threads */ +static int ldlm_bl_thread_need_create(struct ldlm_bl_pool *blp, + struct ldlm_bl_work_item *blwi) +{ + int busy = atomic_read(&blp->blp_busy_threads); + + if (busy >= blp->blp_max_threads) + return 0; + + if (busy < atomic_read(&blp->blp_num_threads)) + return 0; + + if (blwi != NULL && (blwi->blwi_ns == NULL || + blwi->blwi_mem_pressure)) + return 0; + + return 1; +} + +static int ldlm_bl_thread_blwi(struct ldlm_bl_pool *blp, + struct ldlm_bl_work_item *blwi) +{ + ENTRY; + + if (blwi->blwi_ns == NULL) + /* added by ldlm_cleanup() */ + RETURN(LDLM_ITER_STOP); + + if (blwi->blwi_mem_pressure) + memory_pressure_set(); + + OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_PAUSE_CANCEL2, 4); + + if (blwi->blwi_count) { + int count; + /* The special case when we cancel locks in lru + * asynchronously, we pass the list of locks here. + * Thus locks are marked LDLM_FL_CANCELING, but NOT + * canceled locally yet. */ + count = ldlm_cli_cancel_list_local(&blwi->blwi_head, + blwi->blwi_count, + LCF_BL_AST); + ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, + blwi->blwi_flags); + } else { + ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld, + blwi->blwi_lock); + } + if (blwi->blwi_mem_pressure) + memory_pressure_clr(); + + if (blwi->blwi_flags & LCF_ASYNC) + OBD_FREE(blwi, sizeof(*blwi)); + else + complete(&blwi->blwi_comp); + + RETURN(0); +} + +/** + * Cancel stale locks on export. Cancel blocked locks first. + * If the given export has blocked locks, the next in the list may have + * them too, thus cancel not blocked locks only if the current export has + * no blocked locks. + **/ +static int ldlm_bl_thread_exports(struct ldlm_bl_pool *blp, + struct obd_export *exp) +{ + int num; + ENTRY; + + OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_BL_EVICT, 4); + + num = ldlm_export_cancel_blocked_locks(exp); + if (num == 0) + ldlm_export_cancel_locks(exp); + + obd_stale_export_put(exp); + + RETURN(0); +} + + /** * Main blocking requests processing thread. * @@ -2588,86 +2721,53 @@ static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp) static int ldlm_bl_thread_main(void *arg) { struct ldlm_bl_pool *blp; + struct ldlm_bl_thread_data *bltd = arg; ENTRY; - { - struct ldlm_bl_thread_data *bltd = arg; - - blp = bltd->bltd_blp; + blp = bltd->bltd_blp; - bltd->bltd_num = - cfs_atomic_inc_return(&blp->blp_num_threads) - 1; - cfs_atomic_inc(&blp->blp_busy_threads); + atomic_inc(&blp->blp_num_threads); + atomic_inc(&blp->blp_busy_threads); - snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1, - "ldlm_bl_%02d", bltd->bltd_num); - cfs_daemonize(bltd->bltd_name); - - complete(&bltd->bltd_comp); - /* cannot use bltd after this, it is only on caller's stack */ - } + complete(&bltd->bltd_comp); + /* cannot use bltd after this, it is only on caller's stack */ - while (1) { - struct l_wait_info lwi = { 0 }; - struct ldlm_bl_work_item *blwi = NULL; - int busy; + while (1) { + struct l_wait_info lwi = { 0 }; + struct ldlm_bl_work_item *blwi = NULL; + struct obd_export *exp = NULL; + int rc; - blwi = ldlm_bl_get_work(blp); + rc = ldlm_bl_get_work(blp, &blwi, &exp); - if (blwi == NULL) { - cfs_atomic_dec(&blp->blp_busy_threads); - l_wait_event_exclusive(blp->blp_waitq, - (blwi = ldlm_bl_get_work(blp)) != NULL, - &lwi); - busy = cfs_atomic_inc_return(&blp->blp_busy_threads); - } else { - busy = cfs_atomic_read(&blp->blp_busy_threads); - } + if (rc == 0) { + atomic_dec(&blp->blp_busy_threads); + l_wait_event_exclusive(blp->blp_waitq, + ldlm_bl_get_work(blp, &blwi, + &exp), + &lwi); + atomic_inc(&blp->blp_busy_threads); + } - if (blwi->blwi_ns == NULL) - /* added by ldlm_cleanup() */ - break; + if (ldlm_bl_thread_need_create(blp, blwi)) + /* discard the return value, we tried */ + ldlm_bl_thread_start(blp); - /* Not fatal if racy and have a few too many threads */ - if (unlikely(busy < blp->blp_max_threads && - busy >= cfs_atomic_read(&blp->blp_num_threads) && - !blwi->blwi_mem_pressure)) - /* discard the return value, we tried */ - ldlm_bl_thread_start(blp); - - if (blwi->blwi_mem_pressure) - cfs_memory_pressure_set(); - - if (blwi->blwi_count) { - int count; - /* The special case when we cancel locks in LRU - * asynchronously, we pass the list of locks here. - * Thus locks are marked LDLM_FL_CANCELING, but NOT - * canceled locally yet. */ - count = ldlm_cli_cancel_list_local(&blwi->blwi_head, - blwi->blwi_count, - LCF_BL_AST); - ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0); - } else { - ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld, - blwi->blwi_lock); - } - if (blwi->blwi_mem_pressure) - cfs_memory_pressure_clr(); + if (exp) + rc = ldlm_bl_thread_exports(blp, exp); + else if (blwi) + rc = ldlm_bl_thread_blwi(blp, blwi); - if (blwi->blwi_mode == LDLM_ASYNC) - OBD_FREE(blwi, sizeof(*blwi)); - else - complete(&blwi->blwi_comp); - } + if (rc == LDLM_ITER_STOP) + break; + } - cfs_atomic_dec(&blp->blp_busy_threads); - cfs_atomic_dec(&blp->blp_num_threads); + atomic_dec(&blp->blp_busy_threads); + atomic_dec(&blp->blp_num_threads); complete(&blp->blp_comp); - RETURN(0); + RETURN(0); } -#endif static int ldlm_setup(void); static int ldlm_cleanup(void); @@ -2686,7 +2786,6 @@ int ldlm_get_ref(void) RETURN(rc); } -EXPORT_SYMBOL(ldlm_get_ref); void ldlm_put_ref(void) { @@ -2705,66 +2804,65 @@ void ldlm_put_ref(void) EXIT; } -EXPORT_SYMBOL(ldlm_put_ref); /* * Export handle<->lock hash operations. */ static unsigned -ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask) +ldlm_export_lock_hash(struct cfs_hash *hs, const void *key, unsigned mask) { return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask); } static void * -ldlm_export_lock_key(cfs_hlist_node_t *hnode) +ldlm_export_lock_key(struct hlist_node *hnode) { struct ldlm_lock *lock; - lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash); + lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash); return &lock->l_remote_handle; } static void -ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key) +ldlm_export_lock_keycpy(struct hlist_node *hnode, void *key) { struct ldlm_lock *lock; - lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash); + lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash); lock->l_remote_handle = *(struct lustre_handle *)key; } static int -ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode) +ldlm_export_lock_keycmp(const void *key, struct hlist_node *hnode) { return lustre_handle_equal(ldlm_export_lock_key(hnode), key); } static void * -ldlm_export_lock_object(cfs_hlist_node_t *hnode) +ldlm_export_lock_object(struct hlist_node *hnode) { - return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash); + return hlist_entry(hnode, struct ldlm_lock, l_exp_hash); } static void -ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode) +ldlm_export_lock_get(struct cfs_hash *hs, struct hlist_node *hnode) { struct ldlm_lock *lock; - lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash); + lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash); LDLM_LOCK_GET(lock); } static void -ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode) +ldlm_export_lock_put(struct cfs_hash *hs, struct hlist_node *hnode) { struct ldlm_lock *lock; - lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash); + lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash); LDLM_LOCK_RELEASE(lock); } -static cfs_hash_ops_t ldlm_export_lock_ops = { +static struct cfs_hash_ops ldlm_export_lock_ops = { .hs_hash = ldlm_export_lock_hash, .hs_key = ldlm_export_lock_key, .hs_keycmp = ldlm_export_lock_keycmp, @@ -2777,6 +2875,7 @@ static cfs_hash_ops_t ldlm_export_lock_ops = { int ldlm_init_export(struct obd_export *exp) { + int rc; ENTRY; exp->exp_lock_hash = @@ -2792,7 +2891,14 @@ int ldlm_init_export(struct obd_export *exp) if (!exp->exp_lock_hash) RETURN(-ENOMEM); + rc = ldlm_init_flock_export(exp); + if (rc) + GOTO(err, rc); + RETURN(0); +err: + ldlm_destroy_export(exp); + RETURN(rc); } EXPORT_SYMBOL(ldlm_init_export); @@ -2810,11 +2916,13 @@ EXPORT_SYMBOL(ldlm_destroy_export); static int ldlm_setup(void) { static struct ptlrpc_service_conf conf; - struct ldlm_bl_pool *blp = NULL; - int rc = 0; -#ifdef __KERNEL__ - int i; -#endif + struct ldlm_bl_pool *blp = NULL; +#ifdef HAVE_SERVER_SUPPORT + struct task_struct *task; +#endif /* HAVE_SERVER_SUPPORT */ + int i; + int rc = 0; + ENTRY; if (ldlm_state != NULL) @@ -2824,18 +2932,18 @@ static int ldlm_setup(void) if (ldlm_state == NULL) RETURN(-ENOMEM); -#ifdef LPROCFS +#ifdef CONFIG_PROC_FS rc = ldlm_proc_setup(); if (rc != 0) GOTO(out, rc); -#endif +#endif /* CONFIG_PROC_FS */ memset(&conf, 0, sizeof(conf)); conf = (typeof(conf)) { .psc_name = "ldlm_cbd", .psc_watchdog_factor = 2, .psc_buf = { - .bc_nbufs = LDLM_NBUFS, + .bc_nbufs = LDLM_CLIENT_NBUFS, .bc_buf_size = LDLM_BUFSIZE, .bc_req_max_size = LDLM_MAXREQSIZE, .bc_rep_max_size = LDLM_MAXREPSIZE, @@ -2874,7 +2982,7 @@ static int ldlm_setup(void) .psc_name = "ldlm_canceld", .psc_watchdog_factor = 6, .psc_buf = { - .bc_nbufs = LDLM_NBUFS, + .bc_nbufs = LDLM_SERVER_NBUFS, .bc_buf_size = LDLM_BUFSIZE, .bc_req_max_size = LDLM_MAXREQSIZE, .bc_rep_max_size = LDLM_MAXREPSIZE, @@ -2910,7 +3018,7 @@ static int ldlm_setup(void) ldlm_state->ldlm_cancel_service = NULL; GOTO(out, rc); } -#endif +#endif /* HAVE_SERVER_SUPPORT */ OBD_ALLOC(blp, sizeof(*blp)); if (blp == NULL) @@ -2918,13 +3026,12 @@ static int ldlm_setup(void) ldlm_state->ldlm_bl_pool = blp; spin_lock_init(&blp->blp_lock); - CFS_INIT_LIST_HEAD(&blp->blp_list); - CFS_INIT_LIST_HEAD(&blp->blp_prio_list); - cfs_waitq_init(&blp->blp_waitq); - cfs_atomic_set(&blp->blp_num_threads, 0); - cfs_atomic_set(&blp->blp_busy_threads, 0); + INIT_LIST_HEAD(&blp->blp_list); + INIT_LIST_HEAD(&blp->blp_prio_list); + init_waitqueue_head(&blp->blp_waitq); + atomic_set(&blp->blp_num_threads, 0); + atomic_set(&blp->blp_busy_threads, 0); -#ifdef __KERNEL__ if (ldlm_num_threads == 0) { blp->blp_min_threads = LDLM_NTHRS_INIT; blp->blp_max_threads = LDLM_NTHRS_MAX; @@ -2940,31 +3047,37 @@ static int ldlm_setup(void) GOTO(out, rc); } -# ifdef HAVE_SERVER_SUPPORT - CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks); - expired_lock_thread.elt_state = ELT_STOPPED; - cfs_waitq_init(&expired_lock_thread.elt_waitq); +#ifdef HAVE_SERVER_SUPPORT + INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks); + expired_lock_thread.elt_state = ELT_STOPPED; + init_waitqueue_head(&expired_lock_thread.elt_waitq); - CFS_INIT_LIST_HEAD(&waiting_locks_list); + INIT_LIST_HEAD(&waiting_locks_list); spin_lock_init(&waiting_locks_spinlock); - cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0); + cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, NULL); - rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS); - if (rc < 0) { + task = kthread_run(expired_lock_main, NULL, "ldlm_elt"); + if (IS_ERR(task)) { + rc = PTR_ERR(task); CERROR("Cannot start ldlm expired-lock thread: %d\n", rc); GOTO(out, rc); } - cfs_wait_event(expired_lock_thread.elt_waitq, - expired_lock_thread.elt_state == ELT_READY); -# endif /* HAVE_SERVER_SUPPORT */ + wait_event(expired_lock_thread.elt_waitq, + expired_lock_thread.elt_state == ELT_READY); +#endif /* HAVE_SERVER_SUPPORT */ rc = ldlm_pools_init(); if (rc) { CERROR("Failed to initialize LDLM pools: %d\n", rc); GOTO(out, rc); } -#endif + + rc = ldlm_reclaim_setup(); + if (rc) { + CERROR("Failed to setup reclaim thread: rc = %d\n", rc); + GOTO(out, rc); + } RETURN(0); out: @@ -2976,28 +3089,28 @@ static int ldlm_cleanup(void) { ENTRY; - if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) || - !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) { + if (!list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) || + !list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) { CERROR("ldlm still has namespaces; clean these up first.\n"); ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE); ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE); RETURN(-EBUSY); } -#ifdef __KERNEL__ - ldlm_pools_fini(); + ldlm_reclaim_cleanup(); + ldlm_pools_fini(); if (ldlm_state->ldlm_bl_pool != NULL) { struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool; - while (cfs_atomic_read(&blp->blp_num_threads) > 0) { + while (atomic_read(&blp->blp_num_threads) > 0) { struct ldlm_bl_work_item blwi = { .blwi_ns = NULL }; init_completion(&blp->blp_comp); spin_lock(&blp->blp_lock); - cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list); - cfs_waitq_signal(&blp->blp_waitq); + list_add_tail(&blwi.blwi_entry, &blp->blp_list); + wake_up(&blp->blp_waitq); spin_unlock(&blp->blp_lock); wait_for_completion(&blp->blp_comp); @@ -3005,27 +3118,24 @@ static int ldlm_cleanup(void) OBD_FREE(blp, sizeof(*blp)); } -#endif /* __KERNEL__ */ if (ldlm_state->ldlm_cb_service != NULL) ptlrpc_unregister_service(ldlm_state->ldlm_cb_service); -# ifdef HAVE_SERVER_SUPPORT +#ifdef HAVE_SERVER_SUPPORT if (ldlm_state->ldlm_cancel_service != NULL) ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service); -# endif +#endif -#ifdef __KERNEL__ ldlm_proc_cleanup(); -# ifdef HAVE_SERVER_SUPPORT +#ifdef HAVE_SERVER_SUPPORT if (expired_lock_thread.elt_state != ELT_STOPPED) { expired_lock_thread.elt_state = ELT_TERMINATE; - cfs_waitq_signal(&expired_lock_thread.elt_waitq); - cfs_wait_event(expired_lock_thread.elt_waitq, + wake_up(&expired_lock_thread.elt_waitq); + wait_event(expired_lock_thread.elt_waitq, expired_lock_thread.elt_state == ELT_STOPPED); } -# endif -#endif /* __KERNEL__ */ +#endif OBD_FREE(ldlm_state, sizeof(*ldlm_state)); ldlm_state = NULL; @@ -3038,49 +3148,60 @@ int ldlm_init(void) mutex_init(&ldlm_ref_mutex); mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER)); mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT)); - ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources", - sizeof(struct ldlm_resource), 0, - CFS_SLAB_HWCACHE_ALIGN); - if (ldlm_resource_slab == NULL) - return -ENOMEM; - ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks", - sizeof(struct ldlm_lock), 0, - CFS_SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU); - if (ldlm_lock_slab == NULL) { - cfs_mem_cache_destroy(ldlm_resource_slab); + INIT_LIST_HEAD(&ldlm_srv_namespace_list); + INIT_LIST_HEAD(&ldlm_cli_active_namespace_list); + INIT_LIST_HEAD(&ldlm_cli_inactive_namespace_list); + + ldlm_resource_slab = kmem_cache_create("ldlm_resources", + sizeof(struct ldlm_resource), 0, + SLAB_HWCACHE_ALIGN, NULL); + if (ldlm_resource_slab == NULL) return -ENOMEM; - } - ldlm_interval_slab = cfs_mem_cache_create("interval_node", + ldlm_lock_slab = kmem_cache_create("ldlm_locks", + sizeof(struct ldlm_lock), 0, + SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU, NULL); + if (ldlm_lock_slab == NULL) + goto out_resource; + + ldlm_interval_slab = kmem_cache_create("interval_node", sizeof(struct ldlm_interval), - 0, CFS_SLAB_HWCACHE_ALIGN); - if (ldlm_interval_slab == NULL) { - cfs_mem_cache_destroy(ldlm_resource_slab); - cfs_mem_cache_destroy(ldlm_lock_slab); - return -ENOMEM; - } + 0, SLAB_HWCACHE_ALIGN, NULL); + if (ldlm_interval_slab == NULL) + goto out_lock; + + ldlm_interval_tree_slab = kmem_cache_create("interval_tree", + sizeof(struct ldlm_interval_tree) * LCK_MODE_NUM, + 0, SLAB_HWCACHE_ALIGN, NULL); + if (ldlm_interval_tree_slab == NULL) + goto out_interval; + #if LUSTRE_TRACKS_LOCK_EXP_REFS - class_export_dump_hook = ldlm_dump_export_locks; + class_export_dump_hook = ldlm_dump_export_locks; #endif - return 0; + return 0; + +out_interval: + kmem_cache_destroy(ldlm_interval_slab); +out_lock: + kmem_cache_destroy(ldlm_lock_slab); +out_resource: + kmem_cache_destroy(ldlm_resource_slab); + + return -ENOMEM; } void ldlm_exit(void) { - int rc; - if (ldlm_refcount) - CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount); - rc = cfs_mem_cache_destroy(ldlm_resource_slab); - LASSERTF(rc == 0, "couldn't free ldlm resource slab\n"); -#ifdef __KERNEL__ - /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call - * synchronize_rcu() to wait a grace period elapsed, so that - * ldlm_lock_free() get a chance to be called. */ - synchronize_rcu(); -#endif - rc = cfs_mem_cache_destroy(ldlm_lock_slab); - LASSERTF(rc == 0, "couldn't free ldlm lock slab\n"); - rc = cfs_mem_cache_destroy(ldlm_interval_slab); - LASSERTF(rc == 0, "couldn't free interval node slab\n"); + if (ldlm_refcount) + CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount); + kmem_cache_destroy(ldlm_resource_slab); + /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call + * synchronize_rcu() to wait a grace period elapsed, so that + * ldlm_lock_free() get a chance to be called. */ + synchronize_rcu(); + kmem_cache_destroy(ldlm_lock_slab); + kmem_cache_destroy(ldlm_interval_slab); + kmem_cache_destroy(ldlm_interval_tree_slab); }