diff options
Diffstat (limited to 'xlators/features/locks')
| -rw-r--r-- | xlators/features/locks/src/clear.c | 4 | ||||
| -rw-r--r-- | xlators/features/locks/src/common.c | 322 | ||||
| -rw-r--r-- | xlators/features/locks/src/common.h | 41 | ||||
| -rw-r--r-- | xlators/features/locks/src/entrylk.c | 31 | ||||
| -rw-r--r-- | xlators/features/locks/src/inodelk.c | 174 | ||||
| -rw-r--r-- | xlators/features/locks/src/locks.h | 41 | ||||
| -rw-r--r-- | xlators/features/locks/src/posix.c | 220 |
7 files changed, 678 insertions, 155 deletions
diff --git a/xlators/features/locks/src/clear.c b/xlators/features/locks/src/clear.c index 116aed68690..ab1eac68a53 100644 --- a/xlators/features/locks/src/clear.c +++ b/xlators/features/locks/src/clear.c @@ -181,9 +181,9 @@ clrlk_clear_posixlk(xlator_t *this, pl_inode_t *pl_inode, clrlk_args *args, if (plock->blocked) { bcount++; pl_trace_out(this, plock->frame, NULL, NULL, F_SETLKW, - &plock->user_flock, -1, EAGAIN, NULL); + &plock->user_flock, -1, EINTR, NULL); - STACK_UNWIND_STRICT(lk, plock->frame, -1, EAGAIN, + STACK_UNWIND_STRICT(lk, plock->frame, -1, EINTR, &plock->user_flock, NULL); } else { diff --git a/xlators/features/locks/src/common.c b/xlators/features/locks/src/common.c index c78d5372032..a2c6be93e03 100644 --- a/xlators/features/locks/src/common.c +++ b/xlators/features/locks/src/common.c @@ -460,11 +460,16 @@ pl_inode_get(xlator_t *this, inode_t *inode, pl_local_t *local) INIT_LIST_HEAD(&pl_inode->blocked_calls); INIT_LIST_HEAD(&pl_inode->metalk_list); INIT_LIST_HEAD(&pl_inode->queued_locks); + INIT_LIST_HEAD(&pl_inode->waiting); gf_uuid_copy(pl_inode->gfid, inode->gfid); pl_inode->check_mlock_info = _gf_true; pl_inode->mlock_enforced = _gf_false; + /* -2 means never looked up. -1 means something went wrong and link + * tracking is disabled. */ + pl_inode->links = -2; + ret = __inode_ctx_put(inode, this, (uint64_t)(long)(pl_inode)); if (ret) { pthread_mutex_destroy(&pl_inode->mutex); @@ -600,13 +605,11 @@ static void __insert_lock(pl_inode_t *pl_inode, posix_lock_t *lock) { if (lock->blocked) - gettimeofday(&lock->blkd_time, NULL); + lock->blkd_time = gf_time(); else - gettimeofday(&lock->granted_time, NULL); + lock->granted_time = gf_time(); list_add_tail(&lock->list, &pl_inode->ext_list); - - return; } /* Return true if the locks overlap, false otherwise */ @@ -962,7 +965,7 @@ grant_blocked_locks(xlator_t *this, pl_inode_t *pl_inode) struct list_head granted_list; posix_lock_t *tmp = NULL; posix_lock_t *lock = NULL; - + pl_local_t *local = NULL; INIT_LIST_HEAD(&granted_list); pthread_mutex_lock(&pl_inode->mutex); @@ -977,9 +980,9 @@ grant_blocked_locks(xlator_t *this, pl_inode_t *pl_inode) pl_trace_out(this, lock->frame, NULL, NULL, F_SETLKW, &lock->user_flock, 0, 0, NULL); - - STACK_UNWIND_STRICT(lk, lock->frame, 0, 0, &lock->user_flock, NULL); - + local = lock->frame->local; + PL_STACK_UNWIND_AND_FREE(local, lk, lock->frame, 0, 0, + &lock->user_flock, NULL); __destroy_lock(lock); } @@ -999,6 +1002,7 @@ pl_send_prelock_unlock(xlator_t *this, pl_inode_t *pl_inode, struct list_head granted_list; posix_lock_t *tmp = NULL; posix_lock_t *lock = NULL; + pl_local_t *local = NULL; int ret = -1; @@ -1026,9 +1030,9 @@ pl_send_prelock_unlock(xlator_t *this, pl_inode_t *pl_inode, pl_trace_out(this, lock->frame, NULL, NULL, F_SETLKW, &lock->user_flock, 0, 0, NULL); - - STACK_UNWIND_STRICT(lk, lock->frame, 0, 0, &lock->user_flock, NULL); - + local = lock->frame->local; + PL_STACK_UNWIND_AND_FREE(local, lk, lock->frame, 0, 0, + &lock->user_flock, NULL); __destroy_lock(lock); } @@ -1289,3 +1293,299 @@ pl_is_lk_owner_valid(gf_lkowner_t *owner, client_t *client) } return _gf_true; } + +static int32_t +pl_inode_from_loc(loc_t *loc, inode_t **pinode) +{ + inode_t *inode = NULL; + int32_t error = 0; + + if (loc->inode != NULL) { + inode = inode_ref(loc->inode); + goto done; + } + + if (loc->parent == NULL) { + error = EINVAL; + goto done; + } + + if (!gf_uuid_is_null(loc->gfid)) { + inode = inode_find(loc->parent->table, loc->gfid); + if (inode != NULL) { + goto done; + } + } + + if (loc->name == NULL) { + error = EINVAL; + goto done; + } + + inode = inode_grep(loc->parent->table, loc->parent, loc->name); + if (inode == NULL) { + /* We haven't found any inode. This means that the file doesn't exist + * or that even if it exists, we don't have any knowledge about it, so + * we don't have locks on it either, which is fine for our purposes. */ + goto done; + } + +done: + *pinode = inode; + + return error; +} + +static gf_boolean_t +pl_inode_has_owners(xlator_t *xl, client_t *client, pl_inode_t *pl_inode, + struct timespec *now, struct list_head *contend) +{ + pl_dom_list_t *dom; + pl_inode_lock_t *lock; + gf_boolean_t has_owners = _gf_false; + + list_for_each_entry(dom, &pl_inode->dom_list, inode_list) + { + list_for_each_entry(lock, &dom->inodelk_list, list) + { + /* If the lock belongs to the same client, we assume it's related + * to the same operation, so we allow the removal to continue. */ + if (lock->client == client) { + continue; + } + /* If the lock belongs to an internal process, we don't block the + * removal. */ + if (lock->client_pid < 0) { + continue; + } + if (contend == NULL) { + return _gf_true; + } + has_owners = _gf_true; + inodelk_contention_notify_check(xl, lock, now, contend); + } + } + + return has_owners; +} + +int32_t +pl_inode_remove_prepare(xlator_t *xl, call_frame_t *frame, loc_t *loc, + pl_inode_t **ppl_inode, struct list_head *contend) +{ + struct timespec now; + inode_t *inode; + pl_inode_t *pl_inode; + int32_t error; + + pl_inode = NULL; + + error = pl_inode_from_loc(loc, &inode); + if ((error != 0) || (inode == NULL)) { + goto done; + } + + pl_inode = pl_inode_get(xl, inode, NULL); + if (pl_inode == NULL) { + inode_unref(inode); + error = ENOMEM; + goto done; + } + + /* pl_inode_from_loc() already increments ref count for inode, so + * we only assign here our reference. */ + pl_inode->inode = inode; + + timespec_now(&now); + + pthread_mutex_lock(&pl_inode->mutex); + + if (pl_inode->removed) { + error = ESTALE; + goto unlock; + } + + if (pl_inode_has_owners(xl, frame->root->client, pl_inode, &now, contend)) { + error = -1; + /* We skip the unlock here because the caller must create a stub when + * we return -1 and do a call to pl_inode_remove_complete(), which + * assumes the lock is still acquired and will release it once + * everything else is prepared. */ + goto done; + } + + pl_inode->is_locked = _gf_true; + pl_inode->remove_running++; + +unlock: + pthread_mutex_unlock(&pl_inode->mutex); + +done: + *ppl_inode = pl_inode; + + return error; +} + +int32_t +pl_inode_remove_complete(xlator_t *xl, pl_inode_t *pl_inode, call_stub_t *stub, + struct list_head *contend) +{ + pl_inode_lock_t *lock; + int32_t error = -1; + + if (stub != NULL) { + list_add_tail(&stub->list, &pl_inode->waiting); + pl_inode->is_locked = _gf_true; + } else { + error = ENOMEM; + + while (!list_empty(contend)) { + lock = list_first_entry(contend, pl_inode_lock_t, list); + list_del_init(&lock->list); + __pl_inodelk_unref(lock); + } + } + + pthread_mutex_unlock(&pl_inode->mutex); + + if (error < 0) { + inodelk_contention_notify(xl, contend); + } + + inode_unref(pl_inode->inode); + + return error; +} + +void +pl_inode_remove_wake(struct list_head *list) +{ + call_stub_t *stub; + + while (!list_empty(list)) { + stub = list_first_entry(list, call_stub_t, list); + list_del_init(&stub->list); + + call_resume(stub); + } +} + +void +pl_inode_remove_cbk(xlator_t *xl, pl_inode_t *pl_inode, int32_t error) +{ + struct list_head contend, granted; + struct timespec now; + pl_dom_list_t *dom; + + if (pl_inode == NULL) { + return; + } + + INIT_LIST_HEAD(&contend); + INIT_LIST_HEAD(&granted); + timespec_now(&now); + + pthread_mutex_lock(&pl_inode->mutex); + + if (error == 0) { + if (pl_inode->links >= 0) { + pl_inode->links--; + } + if (pl_inode->links == 0) { + pl_inode->removed = _gf_true; + } + } + + pl_inode->remove_running--; + + if ((pl_inode->remove_running == 0) && list_empty(&pl_inode->waiting)) { + pl_inode->is_locked = _gf_false; + + list_for_each_entry(dom, &pl_inode->dom_list, inode_list) + { + __grant_blocked_inode_locks(xl, pl_inode, &granted, dom, &now, + &contend); + } + } + + pthread_mutex_unlock(&pl_inode->mutex); + + unwind_granted_inodes(xl, pl_inode, &granted); + + inodelk_contention_notify(xl, &contend); + + inode_unref(pl_inode->inode); +} + +void +pl_inode_remove_unlocked(xlator_t *xl, pl_inode_t *pl_inode, + struct list_head *list) +{ + call_stub_t *stub, *tmp; + + if (!pl_inode->is_locked) { + return; + } + + list_for_each_entry_safe(stub, tmp, &pl_inode->waiting, list) + { + if (!pl_inode_has_owners(xl, stub->frame->root->client, pl_inode, NULL, + NULL)) { + list_move_tail(&stub->list, list); + } + } +} + +/* This function determines if an inodelk attempt can be done now or it needs + * to wait. + * + * Possible return values: + * < 0: An error occurred. Currently only -ESTALE can be returned if the + * inode has been deleted previously by unlink/rmdir/rename + * = 0: The lock can be attempted. + * > 0: The lock needs to wait because a conflicting remove operation is + * ongoing. + */ +int32_t +pl_inode_remove_inodelk(pl_inode_t *pl_inode, pl_inode_lock_t *lock) +{ + pl_dom_list_t *dom; + pl_inode_lock_t *ilock; + + /* If the inode has been deleted, we won't allow any lock. */ + if (pl_inode->removed) { + return -ESTALE; + } + + /* We only synchronize with locks made for regular operations coming from + * the user. Locks done for internal purposes are hard to control and could + * lead to long delays or deadlocks quite easily. */ + if (lock->client_pid < 0) { + return 0; + } + if (!pl_inode->is_locked) { + return 0; + } + if (pl_inode->remove_running > 0) { + return 1; + } + + list_for_each_entry(dom, &pl_inode->dom_list, inode_list) + { + list_for_each_entry(ilock, &dom->inodelk_list, list) + { + /* If a lock from the same client is already granted, we allow this + * one to continue. This is necessary to prevent deadlocks when + * multiple locks are taken for the same operation. + * + * On the other side it's unlikely that the same client sends + * completely unrelated locks for the same inode. + */ + if (ilock->client == lock->client) { + return 0; + } + } + } + + return 1; +} diff --git a/xlators/features/locks/src/common.h b/xlators/features/locks/src/common.h index 0916c299e84..281223bf3b8 100644 --- a/xlators/features/locks/src/common.h +++ b/xlators/features/locks/src/common.h @@ -105,6 +105,15 @@ void __pl_inodelk_unref(pl_inode_lock_t *lock); void +__grant_blocked_inode_locks(xlator_t *this, pl_inode_t *pl_inode, + struct list_head *granted, pl_dom_list_t *dom, + struct timespec *now, struct list_head *contend); + +void +unwind_granted_inodes(xlator_t *this, pl_inode_t *pl_inode, + struct list_head *granted); + +void grant_blocked_entry_locks(xlator_t *this, pl_inode_t *pl_inode, pl_dom_list_t *dom, struct timespec *now, struct list_head *contend); @@ -204,6 +213,16 @@ pl_metalock_is_active(pl_inode_t *pl_inode); void __pl_queue_lock(pl_inode_t *pl_inode, posix_lock_t *reqlock); +void +inodelk_contention_notify_check(xlator_t *xl, pl_inode_lock_t *lock, + struct timespec *now, + struct list_head *contend); + +void +entrylk_contention_notify_check(xlator_t *xl, pl_entry_lock_t *lock, + struct timespec *now, + struct list_head *contend); + gf_boolean_t pl_does_monkey_want_stuck_lock(); @@ -218,4 +237,26 @@ pl_local_init(call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd); gf_boolean_t pl_is_lk_owner_valid(gf_lkowner_t *owner, client_t *client); + +int32_t +pl_inode_remove_prepare(xlator_t *xl, call_frame_t *frame, loc_t *loc, + pl_inode_t **ppl_inode, struct list_head *contend); + +int32_t +pl_inode_remove_complete(xlator_t *xl, pl_inode_t *pl_inode, call_stub_t *stub, + struct list_head *contend); + +void +pl_inode_remove_wake(struct list_head *list); + +void +pl_inode_remove_cbk(xlator_t *xl, pl_inode_t *pl_inode, int32_t error); + +void +pl_inode_remove_unlocked(xlator_t *xl, pl_inode_t *pl_inode, + struct list_head *list); + +int32_t +pl_inode_remove_inodelk(pl_inode_t *pl_inode, pl_inode_lock_t *lock); + #endif /* __COMMON_H__ */ diff --git a/xlators/features/locks/src/entrylk.c b/xlators/features/locks/src/entrylk.c index 0911659b437..fd772c850dd 100644 --- a/xlators/features/locks/src/entrylk.c +++ b/xlators/features/locks/src/entrylk.c @@ -121,7 +121,6 @@ __stale_entrylk(xlator_t *this, pl_entry_lock_t *candidate_lock, pl_entry_lock_t *requested_lock, time_t *lock_age_sec) { posix_locks_private_t *priv = NULL; - struct timeval curr; priv = this->private; @@ -129,8 +128,7 @@ __stale_entrylk(xlator_t *this, pl_entry_lock_t *candidate_lock, * chance? Or just the locks we are attempting to acquire? */ if (names_conflict(candidate_lock->basename, requested_lock->basename)) { - gettimeofday(&curr, NULL); - *lock_age_sec = curr.tv_sec - candidate_lock->granted_time.tv_sec; + *lock_age_sec = gf_time() - candidate_lock->granted_time; if (*lock_age_sec > priv->revocation_secs) return _gf_true; } @@ -204,9 +202,9 @@ out: return revoke_lock; } -static gf_boolean_t -__entrylk_needs_contention_notify(xlator_t *this, pl_entry_lock_t *lock, - struct timespec *now) +void +entrylk_contention_notify_check(xlator_t *this, pl_entry_lock_t *lock, + struct timespec *now, struct list_head *contend) { posix_locks_private_t *priv; int64_t elapsed; @@ -216,7 +214,7 @@ __entrylk_needs_contention_notify(xlator_t *this, pl_entry_lock_t *lock, /* If this lock is in a list, it means that we are about to send a * notification for it, so no need to do anything else. */ if (!list_empty(&lock->contend)) { - return _gf_false; + return; } elapsed = now->tv_sec; @@ -225,7 +223,7 @@ __entrylk_needs_contention_notify(xlator_t *this, pl_entry_lock_t *lock, elapsed--; } if (elapsed < priv->notify_contention_delay) { - return _gf_false; + return; } /* All contention notifications will be sent outside of the locked @@ -238,7 +236,7 @@ __entrylk_needs_contention_notify(xlator_t *this, pl_entry_lock_t *lock, lock->contention_time = *now; - return _gf_true; + list_add_tail(&lock->contend, contend); } void @@ -332,9 +330,7 @@ __entrylk_grantable(xlator_t *this, pl_dom_list_t *dom, pl_entry_lock_t *lock, break; } } - if (__entrylk_needs_contention_notify(this, tmp, now)) { - list_add_tail(&tmp->contend, contend); - } + entrylk_contention_notify_check(this, tmp, now, contend); } } @@ -546,14 +542,10 @@ static int __lock_blocked_add(xlator_t *this, pl_inode_t *pinode, pl_dom_list_t *dom, pl_entry_lock_t *lock, int nonblock) { - struct timeval now; - if (nonblock) goto out; - gettimeofday(&now, NULL); - - lock->blkd_time = now; + lock->blkd_time = gf_time(); list_add_tail(&lock->blocked_locks, &dom->blocked_entrylks); gf_msg_trace(this->name, 0, "Blocking lock: {pinode=%p, basename=%s}", @@ -614,7 +606,7 @@ __lock_entrylk(xlator_t *this, pl_inode_t *pinode, pl_entry_lock_t *lock, } __pl_entrylk_ref(lock); - gettimeofday(&lock->granted_time, NULL); + lock->granted_time = gf_time(); list_add(&lock->domain_list, &dom->entrylk_list); ret = 0; @@ -697,10 +689,9 @@ __grant_blocked_entry_locks(xlator_t *this, pl_inode_t *pl_inode, bl_ret = __lock_entrylk(bl->this, pl_inode, bl, 0, dom, now, contend); if (bl_ret == 0) { - list_add(&bl->blocked_locks, granted); + list_add_tail(&bl->blocked_locks, granted); } } - return; } /* Grants locks if possible which are blocked on a lock */ diff --git a/xlators/features/locks/src/inodelk.c b/xlators/features/locks/src/inodelk.c index 6022e5a6d94..d4e51d6e0a1 100644 --- a/xlators/features/locks/src/inodelk.c +++ b/xlators/features/locks/src/inodelk.c @@ -140,15 +140,13 @@ __stale_inodelk(xlator_t *this, pl_inode_lock_t *candidate_lock, pl_inode_lock_t *requested_lock, time_t *lock_age_sec) { posix_locks_private_t *priv = NULL; - struct timeval curr; priv = this->private; /* Question: Should we just prune them all given the * chance? Or just the locks we are attempting to acquire? */ if (inodelk_conflict(candidate_lock, requested_lock)) { - gettimeofday(&curr, NULL); - *lock_age_sec = curr.tv_sec - candidate_lock->granted_time.tv_sec; + *lock_age_sec = gf_time() - candidate_lock->granted_time; if (*lock_age_sec > priv->revocation_secs) return _gf_true; } @@ -229,9 +227,9 @@ out: return revoke_lock; } -static gf_boolean_t -__inodelk_needs_contention_notify(xlator_t *this, pl_inode_lock_t *lock, - struct timespec *now) +void +inodelk_contention_notify_check(xlator_t *this, pl_inode_lock_t *lock, + struct timespec *now, struct list_head *contend) { posix_locks_private_t *priv; int64_t elapsed; @@ -241,7 +239,7 @@ __inodelk_needs_contention_notify(xlator_t *this, pl_inode_lock_t *lock, /* If this lock is in a list, it means that we are about to send a * notification for it, so no need to do anything else. */ if (!list_empty(&lock->contend)) { - return _gf_false; + return; } elapsed = now->tv_sec; @@ -250,7 +248,7 @@ __inodelk_needs_contention_notify(xlator_t *this, pl_inode_lock_t *lock, elapsed--; } if (elapsed < priv->notify_contention_delay) { - return _gf_false; + return; } /* All contention notifications will be sent outside of the locked @@ -263,7 +261,7 @@ __inodelk_needs_contention_notify(xlator_t *this, pl_inode_lock_t *lock, lock->contention_time = *now; - return _gf_true; + list_add_tail(&lock->contend, contend); } void @@ -351,9 +349,7 @@ __inodelk_grantable(xlator_t *this, pl_dom_list_t *dom, pl_inode_lock_t *lock, break; } } - if (__inodelk_needs_contention_notify(this, l, now)) { - list_add_tail(&l->contend, contend); - } + inodelk_contention_notify_check(this, l, now, contend); } } @@ -399,15 +395,11 @@ static int __lock_blocked_add(xlator_t *this, pl_dom_list_t *dom, pl_inode_lock_t *lock, int can_block) { - struct timeval now; - if (can_block == 0) { goto out; } - gettimeofday(&now, NULL); - - lock->blkd_time = now; + lock->blkd_time = gf_time(); list_add_tail(&lock->blocked_locks, &dom->blocked_inodelks); gf_msg_trace(this->name, 0, @@ -433,12 +425,17 @@ __lock_inodelk(xlator_t *this, pl_inode_t *pl_inode, pl_inode_lock_t *lock, struct list_head *contend) { pl_inode_lock_t *conf = NULL; - int ret = -EINVAL; + int ret; - conf = __inodelk_grantable(this, dom, lock, now, contend); - if (conf) { - ret = __lock_blocked_add(this, dom, lock, can_block); - goto out; + ret = pl_inode_remove_inodelk(pl_inode, lock); + if (ret < 0) { + return ret; + } + if (ret == 0) { + conf = __inodelk_grantable(this, dom, lock, now, contend); + } + if ((ret > 0) || (conf != NULL)) { + return __lock_blocked_add(this, dom, lock, can_block); } /* To prevent blocked locks starvation, check if there are any blocked @@ -460,17 +457,13 @@ __lock_inodelk(xlator_t *this, pl_inode_t *pl_inode, pl_inode_lock_t *lock, "starvation"); } - ret = __lock_blocked_add(this, dom, lock, can_block); - goto out; + return __lock_blocked_add(this, dom, lock, can_block); } __pl_inodelk_ref(lock); - gettimeofday(&lock->granted_time, NULL); + lock->granted_time = gf_time(); list_add(&lock->list, &dom->inodelk_list); - ret = 0; - -out: - return ret; + return 0; } /* Return true if the two inodelks have exactly same lock boundaries */ @@ -502,33 +495,36 @@ static pl_inode_lock_t * __inode_unlock_lock(xlator_t *this, pl_inode_lock_t *lock, pl_dom_list_t *dom) { pl_inode_lock_t *conf = NULL; + inode_t *inode = NULL; + + inode = lock->pl_inode->inode; conf = find_matching_inodelk(lock, dom); if (!conf) { gf_log(this->name, GF_LOG_ERROR, " Matching lock not found for unlock %llu-%llu, by %s " - "on %p", + "on %p for gfid:%s", (unsigned long long)lock->fl_start, (unsigned long long)lock->fl_end, lkowner_utoa(&lock->owner), - lock->client); + lock->client, inode ? uuid_utoa(inode->gfid) : "UNKNOWN"); goto out; } __delete_inode_lock(conf); gf_log(this->name, GF_LOG_DEBUG, - " Matching lock found for unlock %llu-%llu, by %s on %p", + " Matching lock found for unlock %llu-%llu, by %s on %p for gfid:%s", (unsigned long long)lock->fl_start, (unsigned long long)lock->fl_end, - lkowner_utoa(&lock->owner), lock->client); + lkowner_utoa(&lock->owner), lock->client, + inode ? uuid_utoa(inode->gfid) : "UNKNOWN"); out: return conf; } -static void +void __grant_blocked_inode_locks(xlator_t *this, pl_inode_t *pl_inode, struct list_head *granted, pl_dom_list_t *dom, struct timespec *now, struct list_head *contend) { - int bl_ret = 0; pl_inode_lock_t *bl = NULL; pl_inode_lock_t *tmp = NULL; @@ -541,52 +537,48 @@ __grant_blocked_inode_locks(xlator_t *this, pl_inode_t *pl_inode, { list_del_init(&bl->blocked_locks); - bl_ret = __lock_inodelk(this, pl_inode, bl, 1, dom, now, contend); + bl->status = __lock_inodelk(this, pl_inode, bl, 1, dom, now, contend); - if (bl_ret == 0) { - list_add(&bl->blocked_locks, granted); + if (bl->status != -EAGAIN) { + list_add_tail(&bl->blocked_locks, granted); } } - return; } -/* Grant all inodelks blocked on a lock */ void -grant_blocked_inode_locks(xlator_t *this, pl_inode_t *pl_inode, - pl_dom_list_t *dom, struct timespec *now, - struct list_head *contend) +unwind_granted_inodes(xlator_t *this, pl_inode_t *pl_inode, + struct list_head *granted) { - struct list_head granted; pl_inode_lock_t *lock; pl_inode_lock_t *tmp; + int32_t op_ret; + int32_t op_errno; - INIT_LIST_HEAD(&granted); - - pthread_mutex_lock(&pl_inode->mutex); - { - __grant_blocked_inode_locks(this, pl_inode, &granted, dom, now, - contend); - } - pthread_mutex_unlock(&pl_inode->mutex); - - list_for_each_entry_safe(lock, tmp, &granted, blocked_locks) + list_for_each_entry_safe(lock, tmp, granted, blocked_locks) { - gf_log(this->name, GF_LOG_TRACE, - "%s (pid=%d) (lk-owner=%s) %" PRId64 " - %" PRId64 " => Granted", - lock->fl_type == F_UNLCK ? "Unlock" : "Lock", lock->client_pid, - lkowner_utoa(&lock->owner), lock->user_flock.l_start, - lock->user_flock.l_len); - + if (lock->status == 0) { + op_ret = 0; + op_errno = 0; + gf_log(this->name, GF_LOG_TRACE, + "%s (pid=%d) (lk-owner=%s) %" PRId64 " - %" PRId64 + " => Granted", + lock->fl_type == F_UNLCK ? "Unlock" : "Lock", + lock->client_pid, lkowner_utoa(&lock->owner), + lock->user_flock.l_start, lock->user_flock.l_len); + } else { + op_ret = -1; + op_errno = -lock->status; + } pl_trace_out(this, lock->frame, NULL, NULL, F_SETLKW, &lock->user_flock, - 0, 0, lock->volume); + op_ret, op_errno, lock->volume); - STACK_UNWIND_STRICT(inodelk, lock->frame, 0, 0, NULL); + STACK_UNWIND_STRICT(inodelk, lock->frame, op_ret, op_errno, NULL); lock->frame = NULL; } pthread_mutex_lock(&pl_inode->mutex); { - list_for_each_entry_safe(lock, tmp, &granted, blocked_locks) + list_for_each_entry_safe(lock, tmp, granted, blocked_locks) { list_del_init(&lock->blocked_locks); __pl_inodelk_unref(lock); @@ -595,6 +587,26 @@ grant_blocked_inode_locks(xlator_t *this, pl_inode_t *pl_inode, pthread_mutex_unlock(&pl_inode->mutex); } +/* Grant all inodelks blocked on a lock */ +void +grant_blocked_inode_locks(xlator_t *this, pl_inode_t *pl_inode, + pl_dom_list_t *dom, struct timespec *now, + struct list_head *contend) +{ + struct list_head granted; + + INIT_LIST_HEAD(&granted); + + pthread_mutex_lock(&pl_inode->mutex); + { + __grant_blocked_inode_locks(this, pl_inode, &granted, dom, now, + contend); + } + pthread_mutex_unlock(&pl_inode->mutex); + + unwind_granted_inodes(this, pl_inode, &granted); +} + static void pl_inodelk_log_cleanup(pl_inode_lock_t *lock) { @@ -656,7 +668,7 @@ pl_inodelk_client_cleanup(xlator_t *this, pl_ctx_t *ctx) * and blocked lists, then this means that a parallel * unlock on another inodelk (L2 say) may have 'granted' * L1 and added it to 'granted' list in - * __grant_blocked_node_locks() (although using the + * __grant_blocked_inode_locks() (although using the * 'blocked_locks' member). In that case, the cleanup * codepath must try and grant other overlapping * blocked inodelks from other clients, now that L1 is @@ -741,6 +753,7 @@ pl_inode_setlk(xlator_t *this, pl_ctx_t *ctx, pl_inode_t *pl_inode, gf_boolean_t need_inode_unref = _gf_false; struct list_head *pcontend = NULL; struct list_head contend; + struct list_head wake; struct timespec now = {}; short fl_type; @@ -792,6 +805,8 @@ pl_inode_setlk(xlator_t *this, pl_ctx_t *ctx, pl_inode_t *pl_inode, timespec_now(&now); } + INIT_LIST_HEAD(&wake); + if (ctx) pthread_mutex_lock(&ctx->lock); pthread_mutex_lock(&pl_inode->mutex); @@ -814,18 +829,17 @@ pl_inode_setlk(xlator_t *this, pl_ctx_t *ctx, pl_inode_t *pl_inode, lock->fl_type == F_UNLCK ? "Unlock" : "Lock", lock->client_pid, lkowner_utoa(&lock->owner), lock->user_flock.l_start, lock->user_flock.l_len); - if (can_block) + if (can_block) { unref = _gf_false; - /* For all but the case where a non-blocking - * lock attempt fails, the extra ref taken at - * the start of this function must be negated. - */ - else - need_inode_unref = _gf_true; + } } - - if (ctx && (!ret || can_block)) + /* For all but the case where a non-blocking lock attempt fails + * with -EAGAIN, the extra ref taken at the start of this function + * must be negated. */ + need_inode_unref = (ret != 0) && ((ret != -EAGAIN) || !can_block); + if (ctx && !need_inode_unref) { list_add_tail(&lock->client_list, &ctx->inodelk_lockers); + } } else { /* Irrespective of whether unlock succeeds or not, * the extra inode ref that was done at the start of @@ -843,6 +857,8 @@ pl_inode_setlk(xlator_t *this, pl_ctx_t *ctx, pl_inode_t *pl_inode, list_del_init(&retlock->client_list); __pl_inodelk_unref(retlock); + pl_inode_remove_unlocked(this, pl_inode, &wake); + ret = 0; } out: @@ -853,6 +869,8 @@ pl_inode_setlk(xlator_t *this, pl_ctx_t *ctx, pl_inode_t *pl_inode, if (ctx) pthread_mutex_unlock(&ctx->lock); + pl_inode_remove_wake(&wake); + /* The following (extra) unref corresponds to the ref that * was done at the time the lock was granted. */ @@ -1033,10 +1051,14 @@ pl_common_inodelk(call_frame_t *frame, xlator_t *this, const char *volume, inode); if (ret < 0) { - if ((can_block) && (F_UNLCK != lock_type)) { - goto out; + if (ret == -EAGAIN) { + if (can_block && (F_UNLCK != lock_type)) { + goto out; + } + gf_log(this->name, GF_LOG_TRACE, "returning EAGAIN"); + } else { + gf_log(this->name, GF_LOG_TRACE, "returning %d", ret); } - gf_log(this->name, GF_LOG_TRACE, "returning EAGAIN"); op_errno = -ret; goto unwind; } diff --git a/xlators/features/locks/src/locks.h b/xlators/features/locks/src/locks.h index 3305350afb1..c868eb494a2 100644 --- a/xlators/features/locks/src/locks.h +++ b/xlators/features/locks/src/locks.h @@ -43,9 +43,8 @@ struct __posix_lock { fd_t *fd; call_frame_t *frame; - struct timeval blkd_time; /*time at which lock was queued into blkd list*/ - struct timeval - granted_time; /*time at which lock was queued into active list*/ + time_t blkd_time; /* time at which lock was queued into blkd list */ + time_t granted_time; /* time at which lock was queued into active list */ /* These two together serve to uniquely identify each process across nodes */ @@ -85,9 +84,9 @@ struct __pl_inode_lock { call_frame_t *frame; - struct timeval blkd_time; /*time at which lock was queued into blkd list*/ - struct timeval - granted_time; /*time at which lock was queued into active list*/ + time_t blkd_time; /* time at which lock was queued into blkd list */ + time_t granted_time; /* time at which lock was queued into active list */ + /*last time at which lock contention was detected and notified*/ struct timespec contention_time; @@ -102,6 +101,9 @@ struct __pl_inode_lock { struct list_head client_list; /* list of all locks from a client */ short fl_type; + + int32_t status; /* Error code when we try to grant a lock in blocked + state */ }; typedef struct __pl_inode_lock pl_inode_lock_t; @@ -136,9 +138,9 @@ struct __entry_lock { const char *basename; - struct timeval blkd_time; /*time at which lock was queued into blkd list*/ - struct timeval - granted_time; /*time at which lock was queued into active list*/ + time_t blkd_time; /* time at which lock was queued into blkd list */ + time_t granted_time; /* time at which lock was queued into active list */ + /*last time at which lock contention was detected and notified*/ struct timespec contention_time; @@ -164,13 +166,14 @@ struct __pl_inode { struct list_head rw_list; /* list of waiting r/w requests */ struct list_head reservelk_list; /* list of reservelks */ struct list_head blocked_reservelks; /* list of blocked reservelks */ - struct list_head - blocked_calls; /* List of blocked lock calls while a reserve is held*/ - struct list_head metalk_list; /* Meta lock list */ - /* This is to store the incoming lock - requests while meta lock is enabled */ - struct list_head queued_locks; - int mandatory; /* if mandatory locking is enabled */ + struct list_head blocked_calls; /* List of blocked lock calls while a + reserve is held*/ + struct list_head metalk_list; /* Meta lock list */ + struct list_head queued_locks; /* This is to store the incoming lock + requests while meta lock is enabled */ + struct list_head waiting; /* List of pending fops waiting to unlink/rmdir + the inode. */ + int mandatory; /* if mandatory locking is enabled */ inode_t *refkeeper; /* hold refs on an inode while locks are held to prevent pruning */ @@ -197,7 +200,13 @@ struct __pl_inode { */ int fop_wind_count; pthread_cond_t check_fop_wind_count; + gf_boolean_t track_fop_wind_count; + + int32_t links; /* Number of hard links the inode has. */ + uint32_t remove_running; /* Number of remove operations running. */ + gf_boolean_t is_locked; /* Regular locks will be blocked. */ + gf_boolean_t removed; /* The inode has been deleted. */ }; typedef struct __pl_inode pl_inode_t; diff --git a/xlators/features/locks/src/posix.c b/xlators/features/locks/src/posix.c index af530aafd84..cf0ae4c57dd 100644 --- a/xlators/features/locks/src/posix.c +++ b/xlators/features/locks/src/posix.c @@ -148,6 +148,29 @@ fetch_pathinfo(xlator_t *, inode_t *, int32_t *, char **); } \ } while (0) +#define PL_INODE_REMOVE(_fop, _frame, _xl, _loc1, _loc2, _cont, _cbk, \ + _args...) \ + ({ \ + struct list_head contend; \ + pl_inode_t *__pl_inode; \ + call_stub_t *__stub; \ + int32_t __error; \ + INIT_LIST_HEAD(&contend); \ + __error = pl_inode_remove_prepare(_xl, _frame, _loc2 ? _loc2 : _loc1, \ + &__pl_inode, &contend); \ + if (__error < 0) { \ + __stub = fop_##_fop##_stub(_frame, _cont, ##_args); \ + __error = pl_inode_remove_complete(_xl, __pl_inode, __stub, \ + &contend); \ + } else if (__error == 0) { \ + PL_LOCAL_GET_REQUESTS(_frame, _xl, xdata, ((fd_t *)NULL), _loc1, \ + _loc2); \ + STACK_WIND_COOKIE(_frame, _cbk, __pl_inode, FIRST_CHILD(_xl), \ + FIRST_CHILD(_xl)->fops->_fop, ##_args); \ + } \ + __error; \ + }) + gf_boolean_t pl_has_xdata_requests(dict_t *xdata) { @@ -471,6 +494,9 @@ pl_inodelk_xattr_fill_multiple(dict_t *this, char *key, data_t *value, char *save_ptr = NULL; tmp_key = gf_strdup(key); + if (!tmp_key) + return -1; + strtok_r(tmp_key, ":", &save_ptr); if (!*save_ptr) { if (tmp_key) @@ -2962,11 +2988,85 @@ out: return ret; } +static int32_t +pl_request_link_count(dict_t **pxdata) +{ + dict_t *xdata; + + xdata = *pxdata; + if (xdata == NULL) { + xdata = dict_new(); + if (xdata == NULL) { + return ENOMEM; + } + } else { + dict_ref(xdata); + } + + if (dict_set_uint32(xdata, GET_LINK_COUNT, 0) != 0) { + dict_unref(xdata); + return ENOMEM; + } + + *pxdata = xdata; + + return 0; +} + +static int32_t +pl_check_link_count(dict_t *xdata) +{ + int32_t count; + + /* In case we are unable to read the link count from xdata, we take a + * conservative approach and return -2, which will prevent the inode from + * being considered deleted. In fact it will cause link tracking for this + * inode to be disabled completely to avoid races. */ + + if (xdata == NULL) { + return -2; + } + + if (dict_get_int32(xdata, GET_LINK_COUNT, &count) != 0) { + return -2; + } + + return count; +} + int32_t pl_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *buf, dict_t *xdata, struct iatt *postparent) { + pl_inode_t *pl_inode; + + if (op_ret >= 0) { + pl_inode = pl_inode_get(this, inode, NULL); + if (pl_inode == NULL) { + PL_STACK_UNWIND(lookup, xdata, frame, -1, ENOMEM, NULL, NULL, NULL, + NULL); + return 0; + } + + pthread_mutex_lock(&pl_inode->mutex); + + /* We only update the link count if we previously didn't know it. + * Doing it always can lead to races since lookup is not executed + * atomically most of the times. */ + if (pl_inode->links == -2) { + pl_inode->links = pl_check_link_count(xdata); + if (buf->ia_type == IA_IFDIR) { + /* Directories have at least 2 links. To avoid special handling + * for directories, we simply decrement the value here to make + * them equivalent to regular files. */ + pl_inode->links--; + } + } + + pthread_mutex_unlock(&pl_inode->mutex); + } + PL_STACK_UNWIND(lookup, xdata, frame, op_ret, op_errno, inode, buf, xdata, postparent); return 0; @@ -2975,9 +3075,17 @@ pl_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t pl_lookup(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) { - PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); - STACK_WIND(frame, pl_lookup_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->lookup, loc, xdata); + int32_t error; + + error = pl_request_link_count(&xdata); + if (error == 0) { + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_lookup_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->lookup, loc, xdata); + dict_unref(xdata); + } else { + STACK_UNWIND_STRICT(lookup, frame, -1, error, NULL, NULL, NULL, NULL); + } return 0; } @@ -3502,10 +3610,10 @@ pl_dump_lock(char *str, int size, struct gf_flock *flock, gf_lkowner_t *owner, time_t *blkd_time, gf_boolean_t active) { char *type_str = NULL; - char granted[256] = { + char granted[GF_TIMESTR_SIZE] = { 0, }; - char blocked[256] = { + char blocked[GF_TIMESTR_SIZE] = { 0, }; @@ -3556,10 +3664,10 @@ __dump_entrylks(pl_inode_t *pl_inode) { pl_dom_list_t *dom = NULL; pl_entry_lock_t *lock = NULL; - char blocked[256] = { + char blocked[GF_TIMESTR_SIZE] = { 0, }; - char granted[256] = { + char granted[GF_TIMESTR_SIZE] = { 0, }; int count = 0; @@ -3579,10 +3687,10 @@ __dump_entrylks(pl_inode_t *pl_inode) list_for_each_entry(lock, &dom->entrylk_list, domain_list) { - gf_time_fmt(granted, sizeof(granted), lock->granted_time.tv_sec, + gf_time_fmt(granted, sizeof(granted), lock->granted_time, gf_timefmt_FT); gf_proc_dump_build_key(key, k, "entrylk[%d](ACTIVE)", count); - if (lock->blkd_time.tv_sec == 0) { + if (lock->blkd_time == 0) { snprintf(tmp, sizeof(tmp), ENTRY_GRNTD_FMT, lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" : "ENTRYLK_WRLCK", @@ -3590,7 +3698,7 @@ __dump_entrylks(pl_inode_t *pl_inode) lkowner_utoa(&lock->owner), lock->client, lock->connection_id, granted); } else { - gf_time_fmt(blocked, sizeof(blocked), lock->blkd_time.tv_sec, + gf_time_fmt(blocked, sizeof(blocked), lock->blkd_time, gf_timefmt_FT); snprintf(tmp, sizeof(tmp), ENTRY_BLKD_GRNTD_FMT, lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" @@ -3607,7 +3715,7 @@ __dump_entrylks(pl_inode_t *pl_inode) list_for_each_entry(lock, &dom->blocked_entrylks, blocked_locks) { - gf_time_fmt(blocked, sizeof(blocked), lock->blkd_time.tv_sec, + gf_time_fmt(blocked, sizeof(blocked), lock->blkd_time, gf_timefmt_FT); gf_proc_dump_build_key(key, k, "entrylk[%d](BLOCKED)", count); @@ -3659,9 +3767,8 @@ __dump_inodelks(pl_inode_t *pl_inode) SET_FLOCK_PID(&lock->user_flock, lock); pl_dump_lock(tmp, sizeof(tmp), &lock->user_flock, &lock->owner, - lock->client, lock->connection_id, - &lock->granted_time.tv_sec, &lock->blkd_time.tv_sec, - _gf_true); + lock->client, lock->connection_id, &lock->granted_time, + &lock->blkd_time, _gf_true); gf_proc_dump_write(key, "%s", tmp); count++; @@ -3673,8 +3780,8 @@ __dump_inodelks(pl_inode_t *pl_inode) count); SET_FLOCK_PID(&lock->user_flock, lock); pl_dump_lock(tmp, sizeof(tmp), &lock->user_flock, &lock->owner, - lock->client, lock->connection_id, 0, - &lock->blkd_time.tv_sec, _gf_false); + lock->client, lock->connection_id, 0, &lock->blkd_time, + _gf_false); gf_proc_dump_write(key, "%s", tmp); count++; @@ -3707,9 +3814,8 @@ __dump_posixlks(pl_inode_t *pl_inode) gf_proc_dump_build_key(key, "posixlk", "posixlk[%d](%s)", count, lock->blocked ? "BLOCKED" : "ACTIVE"); pl_dump_lock(tmp, sizeof(tmp), &lock->user_flock, &lock->owner, - lock->client, lock->client_uid, &lock->granted_time.tv_sec, - &lock->blkd_time.tv_sec, - (lock->blocked) ? _gf_false : _gf_true); + lock->client, lock->client_uid, &lock->granted_time, + &lock->blkd_time, (lock->blocked) ? _gf_false : _gf_true); gf_proc_dump_write(key, "%s", tmp); count++; @@ -3793,6 +3899,10 @@ unlock: gf_proc_dump_write("posixlk-count", "%d", count); __dump_posixlks(pl_inode); } + + gf_proc_dump_write("links", "%d", pl_inode->links); + gf_proc_dump_write("removes_pending", "%u", pl_inode->remove_running); + gf_proc_dump_write("removed", "%u", pl_inode->removed); } pthread_mutex_unlock(&pl_inode->mutex); @@ -4104,6 +4214,10 @@ fini(xlator_t *this) if (!priv) return; this->private = NULL; + if (this->local_pool) { + mem_pool_destroy(this->local_pool); + this->local_pool = NULL; + } GF_FREE(priv->brickname); GF_FREE(priv); @@ -4134,8 +4248,11 @@ pl_rename_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, struct iatt *postoldparent, struct iatt *prenewparent, struct iatt *postnewparent, dict_t *xdata) { + pl_inode_remove_cbk(this, cookie, op_ret < 0 ? op_errno : 0); + PL_STACK_UNWIND(rename, xdata, frame, op_ret, op_errno, buf, preoldparent, postoldparent, prenewparent, postnewparent, xdata); + return 0; } @@ -4143,10 +4260,15 @@ int32_t pl_rename(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, dict_t *xdata) { - PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), oldloc, newloc); + int32_t error; + + error = PL_INODE_REMOVE(rename, frame, this, oldloc, newloc, pl_rename, + pl_rename_cbk, oldloc, newloc, xdata); + if (error > 0) { + STACK_UNWIND_STRICT(rename, frame, -1, error, NULL, NULL, NULL, NULL, + NULL, NULL); + } - STACK_WIND(frame, pl_rename_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->rename, oldloc, newloc, xdata); return 0; } @@ -4270,8 +4392,11 @@ pl_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { + pl_inode_remove_cbk(this, cookie, op_ret < 0 ? op_errno : 0); + PL_STACK_UNWIND(unlink, xdata, frame, op_ret, op_errno, preparent, postparent, xdata); + return 0; } @@ -4279,9 +4404,14 @@ int32_t pl_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag, dict_t *xdata) { - PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); - STACK_WIND(frame, pl_unlink_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->unlink, loc, xflag, xdata); + int32_t error; + + error = PL_INODE_REMOVE(unlink, frame, this, loc, NULL, pl_unlink, + pl_unlink_cbk, loc, xflag, xdata); + if (error > 0) { + STACK_UNWIND_STRICT(unlink, frame, -1, error, NULL, NULL, NULL); + } + return 0; } @@ -4348,8 +4478,11 @@ pl_rmdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { + pl_inode_remove_cbk(this, cookie, op_ret < 0 ? op_errno : 0); + PL_STACK_UNWIND_FOR_CLIENT(rmdir, xdata, frame, op_ret, op_errno, preparent, postparent, xdata); + return 0; } @@ -4357,9 +4490,14 @@ int pl_rmdir(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflags, dict_t *xdata) { - PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); - STACK_WIND(frame, pl_rmdir_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->rmdir, loc, xflags, xdata); + int32_t error; + + error = PL_INODE_REMOVE(rmdir, frame, this, loc, NULL, pl_rmdir, + pl_rmdir_cbk, loc, xflags, xdata); + if (error > 0) { + STACK_UNWIND_STRICT(rmdir, frame, -1, error, NULL, NULL, NULL); + } + return 0; } @@ -4389,6 +4527,19 @@ pl_link_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *buf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { + pl_inode_t *pl_inode = (pl_inode_t *)cookie; + + if (op_ret >= 0) { + pthread_mutex_lock(&pl_inode->mutex); + + /* TODO: can happen pl_inode->links == 0 ? */ + if (pl_inode->links >= 0) { + pl_inode->links++; + } + + pthread_mutex_unlock(&pl_inode->mutex); + } + PL_STACK_UNWIND_FOR_CLIENT(link, xdata, frame, op_ret, op_errno, inode, buf, preparent, postparent, xdata); return 0; @@ -4398,9 +4549,18 @@ int pl_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, dict_t *xdata) { + pl_inode_t *pl_inode; + + pl_inode = pl_inode_get(this, oldloc->inode, NULL); + if (pl_inode == NULL) { + STACK_UNWIND_STRICT(link, frame, -1, ENOMEM, NULL, NULL, NULL, NULL, + NULL); + return 0; + } + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), oldloc, newloc); - STACK_WIND(frame, pl_link_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->link, oldloc, newloc, xdata); + STACK_WIND_COOKIE(frame, pl_link_cbk, pl_inode, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->link, oldloc, newloc, xdata); return 0; } |