diff options
Diffstat (limited to 'xlators/features/locks/src/common.c')
| -rw-r--r-- | xlators/features/locks/src/common.c | 1437 |
1 files changed, 699 insertions, 738 deletions
diff --git a/xlators/features/locks/src/common.c b/xlators/features/locks/src/common.c index b4d8aa37219..a953e0d1a4a 100644 --- a/xlators/features/locks/src/common.c +++ b/xlators/features/locks/src/common.c @@ -21,730 +21,701 @@ #include "locks.h" #include "common.h" - static int -__is_lock_grantable (pl_inode_t *pl_inode, posix_lock_t *lock); +__is_lock_grantable(pl_inode_t *pl_inode, posix_lock_t *lock); static void -__insert_and_merge (pl_inode_t *pl_inode, posix_lock_t *lock); +__insert_and_merge(pl_inode_t *pl_inode, posix_lock_t *lock); static int -pl_send_prelock_unlock (xlator_t *this, pl_inode_t *pl_inode, - posix_lock_t *old_lock); +pl_send_prelock_unlock(xlator_t *this, pl_inode_t *pl_inode, + posix_lock_t *old_lock); static pl_dom_list_t * -__allocate_domain (const char *volume) +__allocate_domain(const char *volume) { - pl_dom_list_t *dom = NULL; + pl_dom_list_t *dom = NULL; - dom = GF_CALLOC (1, sizeof (*dom), - gf_locks_mt_pl_dom_list_t); - if (!dom) - goto out; + dom = GF_CALLOC(1, sizeof(*dom), gf_locks_mt_pl_dom_list_t); + if (!dom) + goto out; - dom->domain = gf_strdup(volume); - if (!dom->domain) - goto out; + dom->domain = gf_strdup(volume); + if (!dom->domain) + goto out; - gf_log ("posix-locks", GF_LOG_TRACE, - "New domain allocated: %s", dom->domain); + gf_log("posix-locks", GF_LOG_TRACE, "New domain allocated: %s", + dom->domain); - INIT_LIST_HEAD (&dom->inode_list); - INIT_LIST_HEAD (&dom->entrylk_list); - INIT_LIST_HEAD (&dom->blocked_entrylks); - INIT_LIST_HEAD (&dom->inodelk_list); - INIT_LIST_HEAD (&dom->blocked_inodelks); + INIT_LIST_HEAD(&dom->inode_list); + INIT_LIST_HEAD(&dom->entrylk_list); + INIT_LIST_HEAD(&dom->blocked_entrylks); + INIT_LIST_HEAD(&dom->inodelk_list); + INIT_LIST_HEAD(&dom->blocked_inodelks); out: - if (dom && (NULL == dom->domain)) { - GF_FREE (dom); - dom = NULL; - } + if (dom && (NULL == dom->domain)) { + GF_FREE(dom); + dom = NULL; + } - return dom; + return dom; } /* Returns domain for the lock. If domain is not present, * allocates a domain and returns it */ pl_dom_list_t * -get_domain (pl_inode_t *pl_inode, const char *volume) +get_domain(pl_inode_t *pl_inode, const char *volume) { - pl_dom_list_t *dom = NULL; + pl_dom_list_t *dom = NULL; - GF_VALIDATE_OR_GOTO ("posix-locks", pl_inode, out); - GF_VALIDATE_OR_GOTO ("posix-locks", volume, out); + GF_VALIDATE_OR_GOTO("posix-locks", pl_inode, out); + GF_VALIDATE_OR_GOTO("posix-locks", volume, out); - pthread_mutex_lock (&pl_inode->mutex); + pthread_mutex_lock(&pl_inode->mutex); + { + list_for_each_entry(dom, &pl_inode->dom_list, inode_list) { - list_for_each_entry (dom, &pl_inode->dom_list, inode_list) { - if (strcmp (dom->domain, volume) == 0) - goto unlock; - } - - dom = __allocate_domain (volume); - if (dom) - list_add (&dom->inode_list, &pl_inode->dom_list); + if (strcmp(dom->domain, volume) == 0) + goto unlock; } + + dom = __allocate_domain(volume); + if (dom) + list_add(&dom->inode_list, &pl_inode->dom_list); + } unlock: - pthread_mutex_unlock (&pl_inode->mutex); - if (dom) { - gf_log ("posix-locks", GF_LOG_TRACE, "Domain %s found", volume); - } else { - gf_log ("posix-locks", GF_LOG_TRACE, "Domain %s not found", volume); - } + pthread_mutex_unlock(&pl_inode->mutex); + if (dom) { + gf_log("posix-locks", GF_LOG_TRACE, "Domain %s found", volume); + } else { + gf_log("posix-locks", GF_LOG_TRACE, "Domain %s not found", volume); + } out: - return dom; + return dom; } unsigned long -fd_to_fdnum (fd_t *fd) +fd_to_fdnum(fd_t *fd) { - return ((unsigned long) fd); + return ((unsigned long)fd); } fd_t * -fd_from_fdnum (posix_lock_t *lock) +fd_from_fdnum(posix_lock_t *lock) { - return ((fd_t *) lock->fd_num); + return ((fd_t *)lock->fd_num); } int -__pl_inode_is_empty (pl_inode_t *pl_inode) +__pl_inode_is_empty(pl_inode_t *pl_inode) { - return (list_empty (&pl_inode->ext_list)); + return (list_empty(&pl_inode->ext_list)); } void -pl_print_locker (char *str, int size, xlator_t *this, call_frame_t *frame) +pl_print_locker(char *str, int size, xlator_t *this, call_frame_t *frame) { - snprintf (str, size, "Pid=%llu, lk-owner=%s, Client=%p, Frame=%llu", - (unsigned long long) frame->root->pid, - lkowner_utoa (&frame->root->lk_owner), - frame->root->client, - (unsigned long long) frame->root->unique); + snprintf(str, size, "Pid=%llu, lk-owner=%s, Client=%p, Frame=%llu", + (unsigned long long)frame->root->pid, + lkowner_utoa(&frame->root->lk_owner), frame->root->client, + (unsigned long long)frame->root->unique); } - void -pl_print_lockee (char *str, int size, fd_t *fd, loc_t *loc) +pl_print_lockee(char *str, int size, fd_t *fd, loc_t *loc) { - inode_t *inode = NULL; - char *ipath = NULL; - int ret = 0; + inode_t *inode = NULL; + char *ipath = NULL; + int ret = 0; - if (fd) - inode = fd->inode; - if (loc) - inode = loc->inode; + if (fd) + inode = fd->inode; + if (loc) + inode = loc->inode; - if (!inode) { - snprintf (str, size, "<nul>"); - return; - } + if (!inode) { + snprintf(str, size, "<nul>"); + return; + } - if (loc && loc->path) { - ipath = gf_strdup (loc->path); - } else { - ret = inode_path (inode, NULL, &ipath); - if (ret <= 0) - ipath = NULL; - } + if (loc && loc->path) { + ipath = gf_strdup(loc->path); + } else { + ret = inode_path(inode, NULL, &ipath); + if (ret <= 0) + ipath = NULL; + } - snprintf (str, size, "gfid=%s, fd=%p, path=%s", - uuid_utoa (inode->gfid), fd, - ipath ? ipath : "<nul>"); + snprintf(str, size, "gfid=%s, fd=%p, path=%s", uuid_utoa(inode->gfid), fd, + ipath ? ipath : "<nul>"); - GF_FREE (ipath); + GF_FREE(ipath); } - void -pl_print_lock (char *str, int size, int cmd, - struct gf_flock *flock, gf_lkowner_t *owner) +pl_print_lock(char *str, int size, int cmd, struct gf_flock *flock, + gf_lkowner_t *owner) { - char *cmd_str = NULL; - char *type_str = NULL; + char *cmd_str = NULL; + char *type_str = NULL; - switch (cmd) { + switch (cmd) { #if F_GETLK != F_GETLK64 case F_GETLK64: #endif case F_GETLK: - cmd_str = "GETLK"; - break; + cmd_str = "GETLK"; + break; #if F_SETLK != F_SETLK64 case F_SETLK64: #endif case F_SETLK: - cmd_str = "SETLK"; - break; + cmd_str = "SETLK"; + break; #if F_SETLKW != F_SETLKW64 case F_SETLKW64: #endif case F_SETLKW: - cmd_str = "SETLKW"; - break; + cmd_str = "SETLKW"; + break; default: - cmd_str = "UNKNOWN"; - break; - } + cmd_str = "UNKNOWN"; + break; + } - switch (flock->l_type) { + switch (flock->l_type) { case F_RDLCK: - type_str = "READ"; - break; + type_str = "READ"; + break; case F_WRLCK: - type_str = "WRITE"; - break; + type_str = "WRITE"; + break; case F_UNLCK: - type_str = "UNLOCK"; - break; + type_str = "UNLOCK"; + break; default: - type_str = "UNKNOWN"; - break; - } - - snprintf (str, size, "lock=FCNTL, cmd=%s, type=%s, " - "start=%llu, len=%llu, pid=%llu, lk-owner=%s", - cmd_str, type_str, (unsigned long long) flock->l_start, - (unsigned long long) flock->l_len, - (unsigned long long) flock->l_pid, - lkowner_utoa (owner)); + type_str = "UNKNOWN"; + break; + } + + snprintf(str, size, + "lock=FCNTL, cmd=%s, type=%s, " + "start=%llu, len=%llu, pid=%llu, lk-owner=%s", + cmd_str, type_str, (unsigned long long)flock->l_start, + (unsigned long long)flock->l_len, (unsigned long long)flock->l_pid, + lkowner_utoa(owner)); } - void -pl_trace_in (xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc, - int cmd, struct gf_flock *flock, const char *domain) +pl_trace_in(xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc, int cmd, + struct gf_flock *flock, const char *domain) { - posix_locks_private_t *priv = NULL; - char pl_locker[256]; - char pl_lockee[256]; - char pl_lock[256]; + posix_locks_private_t *priv = NULL; + char pl_locker[256]; + char pl_lockee[256]; + char pl_lock[256]; - priv = this->private; + priv = this->private; - if (!priv->trace) - return; + if (!priv->trace) + return; - pl_print_locker (pl_locker, 256, this, frame); - pl_print_lockee (pl_lockee, 256, fd, loc); - if (domain) - pl_print_inodelk (pl_lock, 256, cmd, flock, domain); - else - pl_print_lock (pl_lock, 256, cmd, flock, &frame->root->lk_owner); + pl_print_locker(pl_locker, 256, this, frame); + pl_print_lockee(pl_lockee, 256, fd, loc); + if (domain) + pl_print_inodelk(pl_lock, 256, cmd, flock, domain); + else + pl_print_lock(pl_lock, 256, cmd, flock, &frame->root->lk_owner); - gf_log (this->name, GF_LOG_INFO, - "[REQUEST] Locker = {%s} Lockee = {%s} Lock = {%s}", - pl_locker, pl_lockee, pl_lock); + gf_log(this->name, GF_LOG_INFO, + "[REQUEST] Locker = {%s} Lockee = {%s} Lock = {%s}", pl_locker, + pl_lockee, pl_lock); } - void -pl_print_verdict (char *str, int size, int op_ret, int op_errno) +pl_print_verdict(char *str, int size, int op_ret, int op_errno) { - char *verdict = NULL; - - if (op_ret == 0) { - verdict = "GRANTED"; - } else { - switch (op_errno) { - case EAGAIN: - verdict = "TRYAGAIN"; - break; - default: - verdict = strerror (op_errno); - } + char *verdict = NULL; + + if (op_ret == 0) { + verdict = "GRANTED"; + } else { + switch (op_errno) { + case EAGAIN: + verdict = "TRYAGAIN"; + break; + default: + verdict = strerror(op_errno); } + } - snprintf (str, size, "%s", verdict); + snprintf(str, size, "%s", verdict); } - void -pl_trace_out (xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc, - int cmd, struct gf_flock *flock, int op_ret, int op_errno, const char *domain) +pl_trace_out(xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc, int cmd, + struct gf_flock *flock, int op_ret, int op_errno, + const char *domain) { - posix_locks_private_t *priv = NULL; - char pl_locker[256]; - char pl_lockee[256]; - char pl_lock[256]; - char verdict[32]; + posix_locks_private_t *priv = NULL; + char pl_locker[256]; + char pl_lockee[256]; + char pl_lock[256]; + char verdict[32]; - priv = this->private; + priv = this->private; - if (!priv->trace) - return; + if (!priv->trace) + return; - pl_print_locker (pl_locker, 256, this, frame); - pl_print_lockee (pl_lockee, 256, fd, loc); - if (domain) - pl_print_inodelk (pl_lock, 256, cmd, flock, domain); - else - pl_print_lock (pl_lock, 256, cmd, flock, &frame->root->lk_owner); + pl_print_locker(pl_locker, 256, this, frame); + pl_print_lockee(pl_lockee, 256, fd, loc); + if (domain) + pl_print_inodelk(pl_lock, 256, cmd, flock, domain); + else + pl_print_lock(pl_lock, 256, cmd, flock, &frame->root->lk_owner); - pl_print_verdict (verdict, 32, op_ret, op_errno); + pl_print_verdict(verdict, 32, op_ret, op_errno); - gf_log (this->name, GF_LOG_INFO, - "[%s] Locker = {%s} Lockee = {%s} Lock = {%s}", - verdict, pl_locker, pl_lockee, pl_lock); + gf_log(this->name, GF_LOG_INFO, + "[%s] Locker = {%s} Lockee = {%s} Lock = {%s}", verdict, pl_locker, + pl_lockee, pl_lock); } - void -pl_trace_block (xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc, - int cmd, struct gf_flock *flock, const char *domain) +pl_trace_block(xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc, + int cmd, struct gf_flock *flock, const char *domain) { - posix_locks_private_t *priv = NULL; - char pl_locker[256]; - char pl_lockee[256]; - char pl_lock[256]; + posix_locks_private_t *priv = NULL; + char pl_locker[256]; + char pl_lockee[256]; + char pl_lock[256]; - priv = this->private; + priv = this->private; - if (!priv->trace) - return; + if (!priv->trace) + return; - pl_print_locker (pl_locker, 256, this, frame); - pl_print_lockee (pl_lockee, 256, fd, loc); - if (domain) - pl_print_inodelk (pl_lock, 256, cmd, flock, domain); - else - pl_print_lock (pl_lock, 256, cmd, flock, &frame->root->lk_owner); + pl_print_locker(pl_locker, 256, this, frame); + pl_print_lockee(pl_lockee, 256, fd, loc); + if (domain) + pl_print_inodelk(pl_lock, 256, cmd, flock, domain); + else + pl_print_lock(pl_lock, 256, cmd, flock, &frame->root->lk_owner); - gf_log (this->name, GF_LOG_INFO, - "[BLOCKED] Locker = {%s} Lockee = {%s} Lock = {%s}", - pl_locker, pl_lockee, pl_lock); + gf_log(this->name, GF_LOG_INFO, + "[BLOCKED] Locker = {%s} Lockee = {%s} Lock = {%s}", pl_locker, + pl_lockee, pl_lock); } - void -pl_trace_flush (xlator_t *this, call_frame_t *frame, fd_t *fd) +pl_trace_flush(xlator_t *this, call_frame_t *frame, fd_t *fd) { - posix_locks_private_t *priv = NULL; - char pl_locker[256]; - char pl_lockee[256]; - pl_inode_t *pl_inode = NULL; + posix_locks_private_t *priv = NULL; + char pl_locker[256]; + char pl_lockee[256]; + pl_inode_t *pl_inode = NULL; - priv = this->private; + priv = this->private; - if (!priv->trace) - return; + if (!priv->trace) + return; - pl_inode = pl_inode_get (this, fd->inode); + pl_inode = pl_inode_get(this, fd->inode); - if (pl_inode && __pl_inode_is_empty (pl_inode)) - return; + if (pl_inode && __pl_inode_is_empty(pl_inode)) + return; - pl_print_locker (pl_locker, 256, this, frame); - pl_print_lockee (pl_lockee, 256, fd, NULL); + pl_print_locker(pl_locker, 256, this, frame); + pl_print_lockee(pl_lockee, 256, fd, NULL); - gf_log (this->name, GF_LOG_INFO, - "[FLUSH] Locker = {%s} Lockee = {%s}", - pl_locker, pl_lockee); + gf_log(this->name, GF_LOG_INFO, "[FLUSH] Locker = {%s} Lockee = {%s}", + pl_locker, pl_lockee); } void -pl_trace_release (xlator_t *this, fd_t *fd) +pl_trace_release(xlator_t *this, fd_t *fd) { - posix_locks_private_t *priv = NULL; - char pl_lockee[256]; + posix_locks_private_t *priv = NULL; + char pl_lockee[256]; - priv = this->private; + priv = this->private; - if (!priv->trace) - return; + if (!priv->trace) + return; - pl_print_lockee (pl_lockee, 256, fd, NULL); + pl_print_lockee(pl_lockee, 256, fd, NULL); - gf_log (this->name, GF_LOG_INFO, - "[RELEASE] Lockee = {%s}", pl_lockee); + gf_log(this->name, GF_LOG_INFO, "[RELEASE] Lockee = {%s}", pl_lockee); } - void -pl_update_refkeeper (xlator_t *this, inode_t *inode) +pl_update_refkeeper(xlator_t *this, inode_t *inode) { - pl_inode_t *pl_inode = NULL; - int is_empty = 0; - int need_unref = 0; - int need_ref = 0; + pl_inode_t *pl_inode = NULL; + int is_empty = 0; + int need_unref = 0; + int need_ref = 0; - pl_inode = pl_inode_get (this, inode); + pl_inode = pl_inode_get(this, inode); - pthread_mutex_lock (&pl_inode->mutex); - { - is_empty = __pl_inode_is_empty (pl_inode); + pthread_mutex_lock(&pl_inode->mutex); + { + is_empty = __pl_inode_is_empty(pl_inode); - if (is_empty && pl_inode->refkeeper) { - need_unref = 1; - pl_inode->refkeeper = NULL; - } + if (is_empty && pl_inode->refkeeper) { + need_unref = 1; + pl_inode->refkeeper = NULL; + } - if (!is_empty && !pl_inode->refkeeper) { - need_ref = 1; - pl_inode->refkeeper = inode; - } + if (!is_empty && !pl_inode->refkeeper) { + need_ref = 1; + pl_inode->refkeeper = inode; } - pthread_mutex_unlock (&pl_inode->mutex); + } + pthread_mutex_unlock(&pl_inode->mutex); - if (need_unref) - inode_unref (inode); + if (need_unref) + inode_unref(inode); - if (need_ref) - inode_ref (inode); + if (need_ref) + inode_ref(inode); } - pl_inode_t * -pl_inode_get (xlator_t *this, inode_t *inode) +pl_inode_get(xlator_t *this, inode_t *inode) { - uint64_t tmp_pl_inode = 0; - pl_inode_t *pl_inode = NULL; - int ret = 0; - - LOCK (&inode->lock); - { - ret = __inode_ctx_get (inode, this, &tmp_pl_inode); - if (ret == 0) { - pl_inode = (pl_inode_t *)(long)tmp_pl_inode; - goto unlock; - } - pl_inode = GF_CALLOC (1, sizeof (*pl_inode), - gf_locks_mt_pl_inode_t); - if (!pl_inode) { - goto unlock; - } + uint64_t tmp_pl_inode = 0; + pl_inode_t *pl_inode = NULL; + int ret = 0; + + LOCK(&inode->lock); + { + ret = __inode_ctx_get(inode, this, &tmp_pl_inode); + if (ret == 0) { + pl_inode = (pl_inode_t *)(long)tmp_pl_inode; + goto unlock; + } + pl_inode = GF_CALLOC(1, sizeof(*pl_inode), gf_locks_mt_pl_inode_t); + if (!pl_inode) { + goto unlock; + } - gf_log (this->name, GF_LOG_TRACE, - "Allocating new pl inode"); - - pthread_mutex_init (&pl_inode->mutex, NULL); - - INIT_LIST_HEAD (&pl_inode->dom_list); - INIT_LIST_HEAD (&pl_inode->ext_list); - INIT_LIST_HEAD (&pl_inode->rw_list); - INIT_LIST_HEAD (&pl_inode->reservelk_list); - INIT_LIST_HEAD (&pl_inode->blocked_reservelks); - INIT_LIST_HEAD (&pl_inode->blocked_calls); - INIT_LIST_HEAD (&pl_inode->metalk_list); - INIT_LIST_HEAD (&pl_inode->queued_locks); - gf_uuid_copy (pl_inode->gfid, inode->gfid); - - ret = __inode_ctx_put (inode, this, (uint64_t)(long)(pl_inode)); - if (ret) { - pthread_mutex_destroy (&pl_inode->mutex); - GF_FREE (pl_inode); - pl_inode = NULL; - goto unlock; - } + gf_log(this->name, GF_LOG_TRACE, "Allocating new pl inode"); + + pthread_mutex_init(&pl_inode->mutex, NULL); + + INIT_LIST_HEAD(&pl_inode->dom_list); + INIT_LIST_HEAD(&pl_inode->ext_list); + INIT_LIST_HEAD(&pl_inode->rw_list); + INIT_LIST_HEAD(&pl_inode->reservelk_list); + INIT_LIST_HEAD(&pl_inode->blocked_reservelks); + INIT_LIST_HEAD(&pl_inode->blocked_calls); + INIT_LIST_HEAD(&pl_inode->metalk_list); + INIT_LIST_HEAD(&pl_inode->queued_locks); + gf_uuid_copy(pl_inode->gfid, inode->gfid); + + ret = __inode_ctx_put(inode, this, (uint64_t)(long)(pl_inode)); + if (ret) { + pthread_mutex_destroy(&pl_inode->mutex); + GF_FREE(pl_inode); + pl_inode = NULL; + goto unlock; } + } unlock: - UNLOCK (&inode->lock); + UNLOCK(&inode->lock); - return pl_inode; + return pl_inode; } - /* Create a new posix_lock_t */ posix_lock_t * -new_posix_lock (struct gf_flock *flock, client_t *client, pid_t client_pid, - gf_lkowner_t *owner, fd_t *fd, uint32_t lk_flags, int blocking) +new_posix_lock(struct gf_flock *flock, client_t *client, pid_t client_pid, + gf_lkowner_t *owner, fd_t *fd, uint32_t lk_flags, int blocking) { - posix_lock_t *lock = NULL; + posix_lock_t *lock = NULL; - GF_VALIDATE_OR_GOTO ("posix-locks", flock, out); - GF_VALIDATE_OR_GOTO ("posix-locks", client, out); - GF_VALIDATE_OR_GOTO ("posix-locks", fd, out); + GF_VALIDATE_OR_GOTO("posix-locks", flock, out); + GF_VALIDATE_OR_GOTO("posix-locks", client, out); + GF_VALIDATE_OR_GOTO("posix-locks", fd, out); - lock = GF_CALLOC (1, sizeof (posix_lock_t), - gf_locks_mt_posix_lock_t); - if (!lock) { - goto out; - } + lock = GF_CALLOC(1, sizeof(posix_lock_t), gf_locks_mt_posix_lock_t); + if (!lock) { + goto out; + } - lock->fl_start = flock->l_start; - lock->fl_type = flock->l_type; + lock->fl_start = flock->l_start; + lock->fl_type = flock->l_type; - if (flock->l_len == 0) - lock->fl_end = LLONG_MAX; - else - lock->fl_end = flock->l_start + flock->l_len - 1; + if (flock->l_len == 0) + lock->fl_end = LLONG_MAX; + else + lock->fl_end = flock->l_start + flock->l_len - 1; - lock->client = client; + lock->client = client; - lock->client_uid = gf_strdup (client->client_uid); - if (lock->client_uid == NULL) { - GF_FREE (lock); - lock = NULL; - goto out; - } + lock->client_uid = gf_strdup(client->client_uid); + if (lock->client_uid == NULL) { + GF_FREE(lock); + lock = NULL; + goto out; + } - lock->fd_num = fd_to_fdnum (fd); - lock->fd = fd; - lock->client_pid = client_pid; - lock->owner = *owner; - lock->lk_flags = lk_flags; + lock->fd_num = fd_to_fdnum(fd); + lock->fd = fd; + lock->client_pid = client_pid; + lock->owner = *owner; + lock->lk_flags = lk_flags; - lock->blocking = blocking; - memcpy (&lock->user_flock, flock, sizeof (lock->user_flock)); + lock->blocking = blocking; + memcpy(&lock->user_flock, flock, sizeof(lock->user_flock)); - INIT_LIST_HEAD (&lock->list); + INIT_LIST_HEAD(&lock->list); out: - return lock; + return lock; } - /* Delete a lock from the inode's lock list */ void -__delete_lock (posix_lock_t *lock) +__delete_lock(posix_lock_t *lock) { - list_del_init (&lock->list); + list_del_init(&lock->list); } - /* Destroy a posix_lock */ void -__destroy_lock (posix_lock_t *lock) +__destroy_lock(posix_lock_t *lock) { - GF_FREE (lock->client_uid); - GF_FREE (lock); + GF_FREE(lock->client_uid); + GF_FREE(lock); } static posix_lock_t * __copy_lock(posix_lock_t *src) { - posix_lock_t *dst; - - dst = GF_MALLOC(sizeof(posix_lock_t), gf_locks_mt_posix_lock_t); - if (dst != NULL) { - memcpy (dst, src, sizeof(posix_lock_t)); - dst->client_uid = gf_strdup(src->client_uid); - if (dst->client_uid == NULL) { - GF_FREE(dst); - dst = NULL; - } - - if (dst != NULL) - INIT_LIST_HEAD (&dst->list); + posix_lock_t *dst; + + dst = GF_MALLOC(sizeof(posix_lock_t), gf_locks_mt_posix_lock_t); + if (dst != NULL) { + memcpy(dst, src, sizeof(posix_lock_t)); + dst->client_uid = gf_strdup(src->client_uid); + if (dst->client_uid == NULL) { + GF_FREE(dst); + dst = NULL; } - return dst; + if (dst != NULL) + INIT_LIST_HEAD(&dst->list); + } + + return dst; } /* Convert a posix_lock to a struct gf_flock */ void -posix_lock_to_flock (posix_lock_t *lock, struct gf_flock *flock) +posix_lock_to_flock(posix_lock_t *lock, struct gf_flock *flock) { - flock->l_pid = lock->user_flock.l_pid; - flock->l_type = lock->fl_type; - flock->l_start = lock->fl_start; - flock->l_owner = lock->owner; - - if (lock->fl_end == LLONG_MAX) - flock->l_len = 0; - else - flock->l_len = lock->fl_end - lock->fl_start + 1; + flock->l_pid = lock->user_flock.l_pid; + flock->l_type = lock->fl_type; + flock->l_start = lock->fl_start; + flock->l_owner = lock->owner; + + if (lock->fl_end == LLONG_MAX) + flock->l_len = 0; + else + flock->l_len = lock->fl_end - lock->fl_start + 1; } /* Insert the lock into the inode's lock list */ static void -__insert_lock (pl_inode_t *pl_inode, posix_lock_t *lock) +__insert_lock(pl_inode_t *pl_inode, posix_lock_t *lock) { - if (lock->blocked) - gettimeofday (&lock->blkd_time, NULL); - else - gettimeofday (&lock->granted_time, NULL); + if (lock->blocked) + gettimeofday(&lock->blkd_time, NULL); + else + gettimeofday(&lock->granted_time, NULL); - list_add_tail (&lock->list, &pl_inode->ext_list); + list_add_tail(&lock->list, &pl_inode->ext_list); - return; + return; } - /* Return true if the locks overlap, false otherwise */ int -locks_overlap (posix_lock_t *l1, posix_lock_t *l2) +locks_overlap(posix_lock_t *l1, posix_lock_t *l2) { - /* - Note: - FUSE always gives us absolute offsets, so no need to worry - about SEEK_CUR or SEEK_END - */ + /* + Note: + FUSE always gives us absolute offsets, so no need to worry + about SEEK_CUR or SEEK_END + */ - return ((l1->fl_end >= l2->fl_start) && - (l2->fl_end >= l1->fl_start)); + return ((l1->fl_end >= l2->fl_start) && (l2->fl_end >= l1->fl_start)); } - /* Return true if the locks have the same owner */ int -same_owner (posix_lock_t *l1, posix_lock_t *l2) +same_owner(posix_lock_t *l1, posix_lock_t *l2) { - - return (is_same_lkowner (&l1->owner, &l2->owner) && - (l1->client == l2->client)); - + return (is_same_lkowner(&l1->owner, &l2->owner) && + (l1->client == l2->client)); } - /* Delete all F_UNLCK locks */ void -__delete_unlck_locks (pl_inode_t *pl_inode) +__delete_unlck_locks(pl_inode_t *pl_inode) { - posix_lock_t *l = NULL; - posix_lock_t *tmp = NULL; - - list_for_each_entry_safe (l, tmp, &pl_inode->ext_list, list) { - if (l->fl_type == F_UNLCK) { - __delete_lock (l); - __destroy_lock (l); - } + posix_lock_t *l = NULL; + posix_lock_t *tmp = NULL; + + list_for_each_entry_safe(l, tmp, &pl_inode->ext_list, list) + { + if (l->fl_type == F_UNLCK) { + __delete_lock(l); + __destroy_lock(l); } + } } - /* Add two locks */ static posix_lock_t * -add_locks (posix_lock_t *l1, posix_lock_t *l2, posix_lock_t *dst) +add_locks(posix_lock_t *l1, posix_lock_t *l2, posix_lock_t *dst) { - posix_lock_t *sum = NULL; + posix_lock_t *sum = NULL; - sum = __copy_lock (dst); - if (!sum) - return NULL; + sum = __copy_lock(dst); + if (!sum) + return NULL; - sum->fl_start = min (l1->fl_start, l2->fl_start); - sum->fl_end = max (l1->fl_end, l2->fl_end); + sum->fl_start = min(l1->fl_start, l2->fl_start); + sum->fl_end = max(l1->fl_end, l2->fl_end); - posix_lock_to_flock (sum, &sum->user_flock); + posix_lock_to_flock(sum, &sum->user_flock); - return sum; + return sum; } /* Subtract two locks */ struct _values { - posix_lock_t *locks[3]; + posix_lock_t *locks[3]; }; /* {big} must always be contained inside {small} */ static struct _values -subtract_locks (posix_lock_t *big, posix_lock_t *small) +subtract_locks(posix_lock_t *big, posix_lock_t *small) { + struct _values v = {.locks = {0, 0, 0}}; - struct _values v = { .locks = {0, 0, 0} }; - - if ((big->fl_start == small->fl_start) && - (big->fl_end == small->fl_end)) { - /* both edges coincide with big */ - v.locks[0] = __copy_lock(big); - if (!v.locks[0]) { - goto out; - } - - v.locks[0]->fl_type = small->fl_type; - v.locks[0]->user_flock.l_type = small->fl_type; - goto done; + if ((big->fl_start == small->fl_start) && (big->fl_end == small->fl_end)) { + /* both edges coincide with big */ + v.locks[0] = __copy_lock(big); + if (!v.locks[0]) { + goto out; } - if ((small->fl_start > big->fl_start) && - (small->fl_end < big->fl_end)) { - /* both edges lie inside big */ - v.locks[0] = __copy_lock(big); - v.locks[1] = __copy_lock(small); - v.locks[2] = __copy_lock(big); - if ((v.locks[0] == NULL) || (v.locks[1] == NULL) || - (v.locks[2] == NULL)) { - goto out; - } - - v.locks[0]->fl_end = small->fl_start - 1; - v.locks[2]->fl_start = small->fl_end + 1; - posix_lock_to_flock (v.locks[0], &v.locks[0]->user_flock); - posix_lock_to_flock (v.locks[2], &v.locks[2]->user_flock); - goto done; - + v.locks[0]->fl_type = small->fl_type; + v.locks[0]->user_flock.l_type = small->fl_type; + goto done; + } + + if ((small->fl_start > big->fl_start) && (small->fl_end < big->fl_end)) { + /* both edges lie inside big */ + v.locks[0] = __copy_lock(big); + v.locks[1] = __copy_lock(small); + v.locks[2] = __copy_lock(big); + if ((v.locks[0] == NULL) || (v.locks[1] == NULL) || + (v.locks[2] == NULL)) { + goto out; } - /* one edge coincides with big */ - if (small->fl_start == big->fl_start) { - v.locks[0] = __copy_lock(big); - v.locks[1] = __copy_lock(small); - if ((v.locks[0] == NULL) || (v.locks[1] == NULL)) { - goto out; - } - - v.locks[0]->fl_start = small->fl_end + 1; - posix_lock_to_flock (v.locks[0], &v.locks[0]->user_flock); - goto done; + v.locks[0]->fl_end = small->fl_start - 1; + v.locks[2]->fl_start = small->fl_end + 1; + posix_lock_to_flock(v.locks[0], &v.locks[0]->user_flock); + posix_lock_to_flock(v.locks[2], &v.locks[2]->user_flock); + goto done; + } + + /* one edge coincides with big */ + if (small->fl_start == big->fl_start) { + v.locks[0] = __copy_lock(big); + v.locks[1] = __copy_lock(small); + if ((v.locks[0] == NULL) || (v.locks[1] == NULL)) { + goto out; } - if (small->fl_end == big->fl_end) { - v.locks[0] = __copy_lock(big); - v.locks[1] = __copy_lock(small); - if ((v.locks[0] == NULL) || (v.locks[1] == NULL)) { - goto out; - } + v.locks[0]->fl_start = small->fl_end + 1; + posix_lock_to_flock(v.locks[0], &v.locks[0]->user_flock); + goto done; + } - v.locks[0]->fl_end = small->fl_start - 1; - posix_lock_to_flock (v.locks[0], &v.locks[0]->user_flock); - goto done; + if (small->fl_end == big->fl_end) { + v.locks[0] = __copy_lock(big); + v.locks[1] = __copy_lock(small); + if ((v.locks[0] == NULL) || (v.locks[1] == NULL)) { + goto out; } - GF_ASSERT (0); - gf_log ("posix-locks", GF_LOG_ERROR, "Unexpected case in subtract_locks"); + v.locks[0]->fl_end = small->fl_start - 1; + posix_lock_to_flock(v.locks[0], &v.locks[0]->user_flock); + goto done; + } + + GF_ASSERT(0); + gf_log("posix-locks", GF_LOG_ERROR, "Unexpected case in subtract_locks"); out: - if (v.locks[0]) { - __destroy_lock(v.locks[0]); - v.locks[0] = NULL; - } - if (v.locks[1]) { - __destroy_lock(v.locks[1]); - v.locks[1] = NULL; - } - if (v.locks[2]) { - __destroy_lock(v.locks[2]); - v.locks[2] = NULL; - } + if (v.locks[0]) { + __destroy_lock(v.locks[0]); + v.locks[0] = NULL; + } + if (v.locks[1]) { + __destroy_lock(v.locks[1]); + v.locks[1] = NULL; + } + if (v.locks[2]) { + __destroy_lock(v.locks[2]); + v.locks[2] = NULL; + } done: - return v; + return v; } static posix_lock_t * -first_conflicting_overlap (pl_inode_t *pl_inode, posix_lock_t *lock) +first_conflicting_overlap(pl_inode_t *pl_inode, posix_lock_t *lock) { - posix_lock_t *l = NULL; - posix_lock_t *conf = NULL; + posix_lock_t *l = NULL; + posix_lock_t *conf = NULL; - pthread_mutex_lock (&pl_inode->mutex); + pthread_mutex_lock(&pl_inode->mutex); + { + list_for_each_entry(l, &pl_inode->ext_list, list) { - list_for_each_entry (l, &pl_inode->ext_list, list) { - if (l->blocked) - continue; - - if (locks_overlap (l, lock)) { - if (same_owner (l, lock)) - continue; - - if ((l->fl_type == F_WRLCK) || - (lock->fl_type == F_WRLCK)) { - conf = l; - goto unlock; - } - } + if (l->blocked) + continue; + + if (locks_overlap(l, lock)) { + if (same_owner(l, lock)) + continue; + + if ((l->fl_type == F_WRLCK) || (lock->fl_type == F_WRLCK)) { + conf = l; + goto unlock; } + } } + } unlock: - pthread_mutex_unlock (&pl_inode->mutex); + pthread_mutex_unlock(&pl_inode->mutex); - return conf; + return conf; } /* @@ -753,364 +724,354 @@ unlock: If {begin} is NULL, then start from the beginning of the list */ static posix_lock_t * -first_overlap (pl_inode_t *pl_inode, posix_lock_t *lock) +first_overlap(pl_inode_t *pl_inode, posix_lock_t *lock) { - posix_lock_t *l = NULL; + posix_lock_t *l = NULL; - list_for_each_entry (l, &pl_inode->ext_list, list) { - if (l->blocked) - continue; + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if (l->blocked) + continue; - if (locks_overlap (l, lock)) - return l; - } + if (locks_overlap(l, lock)) + return l; + } - return NULL; + return NULL; } - - /* Return true if lock is grantable */ static int -__is_lock_grantable (pl_inode_t *pl_inode, posix_lock_t *lock) +__is_lock_grantable(pl_inode_t *pl_inode, posix_lock_t *lock) { - posix_lock_t *l = NULL; - int ret = 1; - - list_for_each_entry (l, &pl_inode->ext_list, list) { - if (!l->blocked && locks_overlap (lock, l)) { - if (((l->fl_type == F_WRLCK) - || (lock->fl_type == F_WRLCK)) - && (lock->fl_type != F_UNLCK) - && !same_owner (l, lock)) { - ret = 0; - break; - } - } + posix_lock_t *l = NULL; + int ret = 1; + + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if (!l->blocked && locks_overlap(lock, l)) { + if (((l->fl_type == F_WRLCK) || (lock->fl_type == F_WRLCK)) && + (lock->fl_type != F_UNLCK) && !same_owner(l, lock)) { + ret = 0; + break; + } } - return ret; + } + return ret; } - -extern void do_blocked_rw (pl_inode_t *); - +extern void +do_blocked_rw(pl_inode_t *); static void -__insert_and_merge (pl_inode_t *pl_inode, posix_lock_t *lock) +__insert_and_merge(pl_inode_t *pl_inode, posix_lock_t *lock) { - posix_lock_t *conf = NULL; - posix_lock_t *t = NULL; - posix_lock_t *sum = NULL; - int i = 0; - struct _values v = { .locks = {0, 0, 0} }; - - list_for_each_entry_safe (conf, t, &pl_inode->ext_list, list) { - if (conf->blocked) - continue; - if (!locks_overlap (conf, lock)) - continue; + posix_lock_t *conf = NULL; + posix_lock_t *t = NULL; + posix_lock_t *sum = NULL; + int i = 0; + struct _values v = {.locks = {0, 0, 0}}; + + list_for_each_entry_safe(conf, t, &pl_inode->ext_list, list) + { + if (conf->blocked) + continue; + if (!locks_overlap(conf, lock)) + continue; + + if (same_owner(conf, lock)) { + if (conf->fl_type == lock->fl_type && + conf->lk_flags == lock->lk_flags) { + sum = add_locks(lock, conf, lock); + + __delete_lock(conf); + __destroy_lock(conf); - if (same_owner (conf, lock)) { - if (conf->fl_type == lock->fl_type && - conf->lk_flags == lock->lk_flags) { - sum = add_locks (lock, conf, lock); - - __delete_lock (conf); - __destroy_lock (conf); - - __destroy_lock (lock); - INIT_LIST_HEAD (&sum->list); - posix_lock_to_flock (sum, &sum->user_flock); - __insert_and_merge (pl_inode, sum); - - return; - } else { - sum = add_locks (lock, conf, conf); + __destroy_lock(lock); + INIT_LIST_HEAD(&sum->list); + posix_lock_to_flock(sum, &sum->user_flock); + __insert_and_merge(pl_inode, sum); - v = subtract_locks (sum, lock); + return; + } else { + sum = add_locks(lock, conf, conf); - __delete_lock (conf); - __destroy_lock (conf); + v = subtract_locks(sum, lock); - __delete_lock (lock); - __destroy_lock (lock); + __delete_lock(conf); + __destroy_lock(conf); - __destroy_lock (sum); + __delete_lock(lock); + __destroy_lock(lock); - for (i = 0; i < 3; i++) { - if (!v.locks[i]) - continue; + __destroy_lock(sum); - __insert_and_merge (pl_inode, - v.locks[i]); - } + for (i = 0; i < 3; i++) { + if (!v.locks[i]) + continue; - __delete_unlck_locks (pl_inode); - return; - } + __insert_and_merge(pl_inode, v.locks[i]); } - if (lock->fl_type == F_UNLCK) { - continue; - } + __delete_unlck_locks(pl_inode); + return; + } + } - if ((conf->fl_type == F_RDLCK) && (lock->fl_type == F_RDLCK)) { - __insert_lock (pl_inode, lock); - return; - } + if (lock->fl_type == F_UNLCK) { + continue; } - /* no conflicts, so just insert */ - if (lock->fl_type != F_UNLCK) { - __insert_lock (pl_inode, lock); - } else { - __destroy_lock (lock); + if ((conf->fl_type == F_RDLCK) && (lock->fl_type == F_RDLCK)) { + __insert_lock(pl_inode, lock); + return; } + } + + /* no conflicts, so just insert */ + if (lock->fl_type != F_UNLCK) { + __insert_lock(pl_inode, lock); + } else { + __destroy_lock(lock); + } } - void -__grant_blocked_locks (xlator_t *this, pl_inode_t *pl_inode, struct list_head *granted) +__grant_blocked_locks(xlator_t *this, pl_inode_t *pl_inode, + struct list_head *granted) { - struct list_head tmp_list; - posix_lock_t *l = NULL; - posix_lock_t *tmp = NULL; - posix_lock_t *conf = NULL; - - INIT_LIST_HEAD (&tmp_list); - - list_for_each_entry_safe (l, tmp, &pl_inode->ext_list, list) { - if (l->blocked) { - conf = first_overlap (pl_inode, l); - if (conf) - continue; - - l->blocked = 0; - list_move_tail (&l->list, &tmp_list); - } + struct list_head tmp_list; + posix_lock_t *l = NULL; + posix_lock_t *tmp = NULL; + posix_lock_t *conf = NULL; + + INIT_LIST_HEAD(&tmp_list); + + list_for_each_entry_safe(l, tmp, &pl_inode->ext_list, list) + { + if (l->blocked) { + conf = first_overlap(pl_inode, l); + if (conf) + continue; + + l->blocked = 0; + list_move_tail(&l->list, &tmp_list); } + } - list_for_each_entry_safe (l, tmp, &tmp_list, list) { - list_del_init (&l->list); + list_for_each_entry_safe(l, tmp, &tmp_list, list) + { + list_del_init(&l->list); - if (__is_lock_grantable (pl_inode, l)) { - conf = GF_CALLOC (1, sizeof (*conf), - gf_locks_mt_posix_lock_t); + if (__is_lock_grantable(pl_inode, l)) { + conf = GF_CALLOC(1, sizeof(*conf), gf_locks_mt_posix_lock_t); - if (!conf) { - l->blocked = 1; - __insert_lock (pl_inode, l); - continue; - } + if (!conf) { + l->blocked = 1; + __insert_lock(pl_inode, l); + continue; + } - conf->frame = l->frame; - l->frame = NULL; + conf->frame = l->frame; + l->frame = NULL; - posix_lock_to_flock (l, &conf->user_flock); + posix_lock_to_flock(l, &conf->user_flock); - gf_log (this->name, GF_LOG_TRACE, - "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => Granted", - l->fl_type == F_UNLCK ? "Unlock" : "Lock", - l->client_pid, lkowner_utoa (&l->owner), - l->user_flock.l_start, - l->user_flock.l_len); + gf_log(this->name, GF_LOG_TRACE, + "%s (pid=%d) lk-owner:%s %" PRId64 " - %" PRId64 + " => Granted", + l->fl_type == F_UNLCK ? "Unlock" : "Lock", l->client_pid, + lkowner_utoa(&l->owner), l->user_flock.l_start, + l->user_flock.l_len); - __insert_and_merge (pl_inode, l); + __insert_and_merge(pl_inode, l); - list_add (&conf->list, granted); - } else { - l->blocked = 1; - __insert_lock (pl_inode, l); - } + list_add(&conf->list, granted); + } else { + l->blocked = 1; + __insert_lock(pl_inode, l); } + } } - void -grant_blocked_locks (xlator_t *this, pl_inode_t *pl_inode) +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; + struct list_head granted_list; + posix_lock_t *tmp = NULL; + posix_lock_t *lock = NULL; - INIT_LIST_HEAD (&granted_list); + INIT_LIST_HEAD(&granted_list); - pthread_mutex_lock (&pl_inode->mutex); - { - __grant_blocked_locks (this, pl_inode, &granted_list); - } - pthread_mutex_unlock (&pl_inode->mutex); + pthread_mutex_lock(&pl_inode->mutex); + { + __grant_blocked_locks(this, pl_inode, &granted_list); + } + pthread_mutex_unlock(&pl_inode->mutex); - list_for_each_entry_safe (lock, tmp, &granted_list, list) { - list_del_init (&lock->list); + list_for_each_entry_safe(lock, tmp, &granted_list, list) + { + list_del_init(&lock->list); - pl_trace_out (this, lock->frame, NULL, NULL, F_SETLKW, - &lock->user_flock, 0, 0, NULL); + 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); + STACK_UNWIND_STRICT(lk, lock->frame, 0, 0, &lock->user_flock, NULL); - __destroy_lock(lock); - } + __destroy_lock(lock); + } - return; + return; } static int -pl_send_prelock_unlock (xlator_t *this, pl_inode_t *pl_inode, - posix_lock_t *old_lock) +pl_send_prelock_unlock(xlator_t *this, pl_inode_t *pl_inode, + posix_lock_t *old_lock) { - struct gf_flock flock = {0,}; - posix_lock_t *unlock_lock = NULL; + struct gf_flock flock = { + 0, + }; + posix_lock_t *unlock_lock = NULL; - struct list_head granted_list; - posix_lock_t *tmp = NULL; - posix_lock_t *lock = NULL; + struct list_head granted_list; + posix_lock_t *tmp = NULL; + posix_lock_t *lock = NULL; - int ret = -1; + int ret = -1; - INIT_LIST_HEAD (&granted_list); + INIT_LIST_HEAD(&granted_list); - flock.l_type = F_UNLCK; - flock.l_whence = old_lock->user_flock.l_whence; - flock.l_start = old_lock->user_flock.l_start; - flock.l_len = old_lock->user_flock.l_len; - flock.l_pid = old_lock->user_flock.l_pid; + flock.l_type = F_UNLCK; + flock.l_whence = old_lock->user_flock.l_whence; + flock.l_start = old_lock->user_flock.l_start; + flock.l_len = old_lock->user_flock.l_len; + flock.l_pid = old_lock->user_flock.l_pid; + unlock_lock = new_posix_lock(&flock, old_lock->client, old_lock->client_pid, + &old_lock->owner, old_lock->fd, + old_lock->lk_flags, 0); + GF_VALIDATE_OR_GOTO(this->name, unlock_lock, out); + ret = 0; - unlock_lock = new_posix_lock (&flock, old_lock->client, - old_lock->client_pid, &old_lock->owner, - old_lock->fd, old_lock->lk_flags, 0); - GF_VALIDATE_OR_GOTO (this->name, unlock_lock, out); - ret = 0; + __insert_and_merge(pl_inode, unlock_lock); - __insert_and_merge (pl_inode, unlock_lock); + __grant_blocked_locks(this, pl_inode, &granted_list); - __grant_blocked_locks (this, pl_inode, &granted_list); + list_for_each_entry_safe(lock, tmp, &granted_list, list) + { + list_del_init(&lock->list); - list_for_each_entry_safe (lock, tmp, &granted_list, list) { - list_del_init (&lock->list); + pl_trace_out(this, lock->frame, NULL, NULL, F_SETLKW, &lock->user_flock, + 0, 0, NULL); - 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); - STACK_UNWIND_STRICT (lk, lock->frame, 0, 0, - &lock->user_flock, NULL); - - __destroy_lock(lock); - } + __destroy_lock(lock); + } out: - return ret; + return ret; } int -pl_setlk (xlator_t *this, pl_inode_t *pl_inode, posix_lock_t *lock, - int can_block) +pl_setlk(xlator_t *this, pl_inode_t *pl_inode, posix_lock_t *lock, + int can_block) { - int ret = 0; + int ret = 0; - errno = 0; + errno = 0; - pthread_mutex_lock (&pl_inode->mutex); - { - /* Send unlock before the actual lock to - prevent lock upgrade / downgrade - problems only if: - - it is a blocking call - - it has other conflicting locks - */ - - if (can_block && - !(__is_lock_grantable (pl_inode, lock))) { - ret = pl_send_prelock_unlock (this, pl_inode, - lock); - if (ret) - gf_log (this->name, GF_LOG_DEBUG, - "Could not send pre-lock " - "unlock"); - } + pthread_mutex_lock(&pl_inode->mutex); + { + /* Send unlock before the actual lock to + prevent lock upgrade / downgrade + problems only if: + - it is a blocking call + - it has other conflicting locks + */ - if (__is_lock_grantable (pl_inode, lock)) { - if (pl_metalock_is_active (pl_inode)) { - __pl_queue_lock (pl_inode, lock, can_block); - pthread_mutex_unlock (&pl_inode->mutex); - ret = -2; - goto out; - } - gf_log (this->name, GF_LOG_TRACE, - "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => OK", - lock->fl_type == F_UNLCK ? "Unlock" : "Lock", - lock->client_pid, - lkowner_utoa (&lock->owner), - lock->user_flock.l_start, - lock->user_flock.l_len); - __insert_and_merge (pl_inode, lock); - } else if (can_block) { - if (pl_metalock_is_active (pl_inode)) { - __pl_queue_lock (pl_inode, lock, can_block); - pthread_mutex_unlock (&pl_inode->mutex); - ret = -2; - goto out; - } - gf_log (this->name, GF_LOG_TRACE, - "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => Blocked", - lock->fl_type == F_UNLCK ? "Unlock" : "Lock", - lock->client_pid, - lkowner_utoa (&lock->owner), - lock->user_flock.l_start, - lock->user_flock.l_len); - lock->blocked = 1; - __insert_lock (pl_inode, lock); - ret = -1; - } else { - gf_log (this->name, GF_LOG_TRACE, - "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => NOK", - lock->fl_type == F_UNLCK ? "Unlock" : "Lock", - lock->client_pid, - lkowner_utoa (&lock->owner), - lock->user_flock.l_start, - lock->user_flock.l_len); - errno = EAGAIN; - ret = -1; - } + if (can_block && !(__is_lock_grantable(pl_inode, lock))) { + ret = pl_send_prelock_unlock(this, pl_inode, lock); + if (ret) + gf_log(this->name, GF_LOG_DEBUG, + "Could not send pre-lock " + "unlock"); } - pthread_mutex_unlock (&pl_inode->mutex); - grant_blocked_locks (this, pl_inode); + if (__is_lock_grantable(pl_inode, lock)) { + if (pl_metalock_is_active(pl_inode)) { + __pl_queue_lock(pl_inode, lock, can_block); + pthread_mutex_unlock(&pl_inode->mutex); + ret = -2; + goto out; + } + gf_log(this->name, GF_LOG_TRACE, + "%s (pid=%d) lk-owner:%s %" PRId64 " - %" PRId64 " => OK", + lock->fl_type == F_UNLCK ? "Unlock" : "Lock", + lock->client_pid, lkowner_utoa(&lock->owner), + lock->user_flock.l_start, lock->user_flock.l_len); + __insert_and_merge(pl_inode, lock); + } else if (can_block) { + if (pl_metalock_is_active(pl_inode)) { + __pl_queue_lock(pl_inode, lock, can_block); + pthread_mutex_unlock(&pl_inode->mutex); + ret = -2; + goto out; + } + gf_log(this->name, GF_LOG_TRACE, + "%s (pid=%d) lk-owner:%s %" PRId64 " - %" PRId64 + " => Blocked", + lock->fl_type == F_UNLCK ? "Unlock" : "Lock", + lock->client_pid, lkowner_utoa(&lock->owner), + lock->user_flock.l_start, lock->user_flock.l_len); + lock->blocked = 1; + __insert_lock(pl_inode, lock); + ret = -1; + } else { + gf_log(this->name, GF_LOG_TRACE, + "%s (pid=%d) lk-owner:%s %" PRId64 " - %" PRId64 " => NOK", + lock->fl_type == F_UNLCK ? "Unlock" : "Lock", + lock->client_pid, lkowner_utoa(&lock->owner), + lock->user_flock.l_start, lock->user_flock.l_len); + errno = EAGAIN; + ret = -1; + } + } + pthread_mutex_unlock(&pl_inode->mutex); - do_blocked_rw (pl_inode); + grant_blocked_locks(this, pl_inode); + + do_blocked_rw(pl_inode); out: - return ret; + return ret; } - posix_lock_t * -pl_getlk (pl_inode_t *pl_inode, posix_lock_t *lock) +pl_getlk(pl_inode_t *pl_inode, posix_lock_t *lock) { - posix_lock_t *conf = NULL; + posix_lock_t *conf = NULL; - conf = first_conflicting_overlap (pl_inode, lock); + conf = first_conflicting_overlap(pl_inode, lock); - if (conf == NULL) { - lock->fl_type = F_UNLCK; - return lock; - } + if (conf == NULL) { + lock->fl_type = F_UNLCK; + return lock; + } - return conf; + return conf; } gf_boolean_t pl_does_monkey_want_stuck_lock() { - long int monkey_unlock_rand = 0; - long int monkey_unlock_rand_rem = 0; - - /* coverity[DC.WEAK_CRYPTO] */ - monkey_unlock_rand = random (); - monkey_unlock_rand_rem = monkey_unlock_rand % 100; - if (monkey_unlock_rand_rem == 0) - return _gf_true; - return _gf_false; + long int monkey_unlock_rand = 0; + long int monkey_unlock_rand_rem = 0; + + /* coverity[DC.WEAK_CRYPTO] */ + monkey_unlock_rand = random(); + monkey_unlock_rand_rem = monkey_unlock_rand % 100; + if (monkey_unlock_rand_rem == 0) + return _gf_true; + return _gf_false; } |