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authorPavan Vilas Sondur <pavan@dev.gluster.com>2009-09-23 06:01:10 +0000
committerAnand V. Avati <avati@dev.gluster.com>2009-09-23 06:27:26 -0700
commit435b28132b8f276681d19ae14fa988d26a16f659 (patch)
treec810b46caa9ab04232cfe61136e6a4eaf3320517 /xlators/features
parent5535110f8e760eecb12140aafd70174e7d7bfcda (diff)
Removed internal.c and old domain definition in locks.
Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 222 (Enhance Internal locks to support multilple domains and rewrite inodelks) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=222
Diffstat (limited to 'xlators/features')
-rw-r--r--xlators/features/locks/src/Makefile.am2
-rw-r--r--xlators/features/locks/src/common.c15
-rw-r--r--xlators/features/locks/src/internal.c896
3 files changed, 7 insertions, 906 deletions
diff --git a/xlators/features/locks/src/Makefile.am b/xlators/features/locks/src/Makefile.am
index ec4a953..f59ec6e 100644
--- a/xlators/features/locks/src/Makefile.am
+++ b/xlators/features/locks/src/Makefile.am
@@ -3,7 +3,7 @@ xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/features
locks_la_LDFLAGS = -module -avoidversion
-locks_la_SOURCES = common.c posix.c internal.c
+locks_la_SOURCES = common.c posix.c
locks_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
noinst_HEADERS = locks.h common.h
diff --git a/xlators/features/locks/src/common.c b/xlators/features/locks/src/common.c
index 1f10aa2..2a393e7 100644
--- a/xlators/features/locks/src/common.c
+++ b/xlators/features/locks/src/common.c
@@ -44,9 +44,6 @@ static void
__insert_and_merge (pl_inode_t *pl_inode, posix_lock_t *lock,
gf_lk_domain_t dom);
-#define DOMAIN_HEAD(pl_inode, dom) (dom == GF_LOCK_POSIX \
- ? &pl_inode->ext_list \
- : &pl_inode->int_list)
pl_inode_t *
pl_inode_get (xlator_t *this, inode_t *inode)
@@ -150,7 +147,7 @@ posix_lock_to_flock (posix_lock_t *lock, struct flock *flock)
static void
__insert_lock (pl_inode_t *pl_inode, posix_lock_t *lock, gf_lk_domain_t dom)
{
- list_add_tail (&lock->list, DOMAIN_HEAD (pl_inode, dom));
+ list_add_tail (&lock->list, &pl_inode->ext_list);
return;
}
@@ -187,7 +184,7 @@ __delete_unlck_locks (pl_inode_t *pl_inode, gf_lk_domain_t dom)
posix_lock_t *l = NULL;
posix_lock_t *tmp = NULL;
- list_for_each_entry_safe (l, tmp, DOMAIN_HEAD (pl_inode, dom), list) {
+ list_for_each_entry_safe (l, tmp, &pl_inode->ext_list, list) {
if (l->fl_type == F_UNLCK) {
__delete_lock (pl_inode, l);
__destroy_lock (l);
@@ -291,7 +288,7 @@ first_overlap (pl_inode_t *pl_inode, posix_lock_t *lock,
{
posix_lock_t *l = NULL;
- list_for_each_entry (l, DOMAIN_HEAD (pl_inode, dom), list) {
+ list_for_each_entry (l, &pl_inode->ext_list, list) {
if (l->blocked)
continue;
@@ -312,7 +309,7 @@ __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, DOMAIN_HEAD (pl_inode, dom), list) {
+ 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))
@@ -340,7 +337,7 @@ __insert_and_merge (pl_inode_t *pl_inode, posix_lock_t *lock,
int i = 0;
struct _values v = { .locks = {0, 0, 0} };
- list_for_each_entry_safe (conf, t, DOMAIN_HEAD (pl_inode, dom), list) {
+ list_for_each_entry_safe (conf, t, &pl_inode->ext_list, list) {
if (!locks_overlap (conf, lock))
continue;
@@ -423,7 +420,7 @@ __grant_blocked_locks (xlator_t *this, pl_inode_t *pl_inode,
INIT_LIST_HEAD (&tmp_list);
- list_for_each_entry_safe (l, tmp, DOMAIN_HEAD (pl_inode, dom), list) {
+ list_for_each_entry_safe (l, tmp, &pl_inode->ext_list, list) {
if (l->blocked) {
conf = first_overlap (pl_inode, l, dom);
if (conf)
diff --git a/xlators/features/locks/src/internal.c b/xlators/features/locks/src/internal.c
deleted file mode 100644
index 6524721..0000000
--- a/xlators/features/locks/src/internal.c
+++ /dev/null
@@ -1,896 +0,0 @@
-/*
- Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
- This file is part of GlusterFS.
-
- GlusterFS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3 of the License,
- or (at your option) any later version.
-
- GlusterFS is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see
- <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef _CONFIG_H
-#define _CONFIG_H
-#include "config.h"
-#endif
-
-#include "glusterfs.h"
-#include "compat.h"
-#include "xlator.h"
-#include "inode.h"
-#include "logging.h"
-#include "common-utils.h"
-#include "list.h"
-
-#include "locks.h"
-#include "common.h"
-
-
-static int
-release_inode_locks_of_transport (xlator_t *this,
- inode_t *inode, transport_t *trans)
-{
- posix_lock_t *tmp = NULL;
- posix_lock_t *l = NULL;
-
- pl_inode_t * pinode = NULL;
-
- struct list_head granted;
-
- char *path = NULL;
-
- INIT_LIST_HEAD (&granted);
-
- pinode = pl_inode_get (this, inode);
-
- pthread_mutex_lock (&pinode->mutex);
- {
- if (list_empty (&pinode->int_list)) {
- goto unlock;
- }
-
- list_for_each_entry_safe (l, tmp, &pinode->int_list, list) {
- if (l->transport != trans)
- continue;
-
- list_del_init (&l->list);
-
- __delete_lock (pinode, l);
-
- inode_path (inode, NULL, &path);
-
- gf_log (this->name, GF_LOG_TRACE,
- "releasing lock on %s held by "
- "{transport=%p, pid=%"PRId64"}",
- path, trans,
- (uint64_t) l->client_pid);
-
- if (path)
- FREE (path);
-
- __destroy_lock (l);
- }
- }
-unlock:
- pthread_mutex_unlock (&pinode->mutex);
-
- grant_blocked_locks (this, pinode, GF_LOCK_INTERNAL);
-
- return 0;
-}
-
-
-/**
- * pl_inodelk:
- *
- * This fop provides fcntl-style locking on files for internal
- * purposes. Locks held through this fop reside in a domain different
- * from those held by applications. This fop is for the use of AFR.
- */
-
-int
-pl_inodelk (call_frame_t *frame, xlator_t *this,
- const char *volume, loc_t *loc, int32_t cmd, struct flock *flock)
-{
- int32_t op_ret = -1;
- int32_t op_errno = 0;
- int ret = -1;
- int can_block = 0;
- posix_locks_private_t * priv = NULL;
- transport_t * transport = NULL;
- pid_t client_pid = -1;
- pl_inode_t * pinode = NULL;
- posix_lock_t * reqlock = NULL;
-
- VALIDATE_OR_GOTO (frame, out);
- VALIDATE_OR_GOTO (loc, out);
- VALIDATE_OR_GOTO (flock, out);
-
- if ((flock->l_start < 0) || (flock->l_len < 0)) {
- op_errno = EINVAL;
- goto unwind;
- }
-
- transport = frame->root->trans;
- client_pid = frame->root->pid;
-
- priv = (posix_locks_private_t *) this->private;
-
- VALIDATE_OR_GOTO (priv, out);
-
- pinode = pl_inode_get (this, loc->inode);
- if (!pinode) {
- gf_log (this->name, GF_LOG_ERROR,
- "Out of memory.");
- op_errno = ENOMEM;
- goto unwind;
- }
-
- if (client_pid == 0) {
- /*
- special case: this means release all locks
- from this transport
- */
- gf_log (this->name, GF_LOG_TRACE,
- "Releasing all locks from transport %p", transport);
-
- release_inode_locks_of_transport (this, loc->inode, transport);
- goto unwind;
- }
-
- reqlock = new_posix_lock (flock, transport, client_pid);
- if (!reqlock) {
- gf_log (this->name, GF_LOG_ERROR,
- "Out of memory.");
- op_ret = -1;
- op_errno = ENOMEM;
- goto unwind;
- }
-
- switch (cmd) {
- case F_SETLKW:
- can_block = 1;
- reqlock->frame = frame;
- reqlock->this = this;
-
- /* fall through */
-
- case F_SETLK:
- memcpy (&reqlock->user_flock, flock, sizeof (struct flock));
- ret = pl_setlk (this, pinode, reqlock,
- can_block, GF_LOCK_INTERNAL);
-
- if (ret == -1) {
- if (can_block)
- goto out;
-
- gf_log (this->name, GF_LOG_TRACE, "returning EAGAIN");
- op_errno = EAGAIN;
- __destroy_lock (reqlock);
- goto unwind;
- }
- break;
-
- default:
- op_errno = ENOTSUP;
- gf_log (this->name, GF_LOG_ERROR,
- "Unexpected case in inodelk (cmd=%d). "
- "Please file a bug report at http://bugs.gluster.com",
- cmd);
- goto unwind;
- }
-
- op_ret = 0;
-
-unwind:
- STACK_UNWIND (frame, op_ret, op_errno);
-out:
- return 0;
-}
-
-
-int
-pl_finodelk (call_frame_t *frame, xlator_t *this,
- const char *volume, fd_t *fd, int32_t cmd, struct flock *flock)
-{
- int32_t op_ret = -1;
- int32_t op_errno = 0;
- int ret = -1;
- int can_block = 0;
- posix_locks_private_t * priv = NULL;
- transport_t * transport = NULL;
- pid_t client_pid = -1;
- pl_inode_t * pinode = NULL;
- posix_lock_t * reqlock = NULL;
-
- VALIDATE_OR_GOTO (frame, out);
- VALIDATE_OR_GOTO (fd, out);
- VALIDATE_OR_GOTO (flock, out);
-
- if ((flock->l_start < 0) || (flock->l_len < 0)) {
- op_errno = EINVAL;
- goto unwind;
- }
-
- transport = frame->root->trans;
- client_pid = frame->root->pid;
-
- priv = (posix_locks_private_t *) this->private;
-
- VALIDATE_OR_GOTO (priv, out);
-
- pinode = pl_inode_get (this, fd->inode);
- if (!pinode) {
- gf_log (this->name, GF_LOG_ERROR,
- "Out of memory.");
- op_errno = ENOMEM;
- goto unwind;
- }
-
- if (client_pid == 0) {
- /*
- special case: this means release all locks
- from this transport
- */
- gf_log (this->name, GF_LOG_TRACE,
- "Releasing all locks from transport %p", transport);
-
- release_inode_locks_of_transport (this, fd->inode, transport);
- goto unwind;
- }
-
- reqlock = new_posix_lock (flock, transport, client_pid);
- if (!reqlock) {
- gf_log (this->name, GF_LOG_ERROR,
- "Out of memory.");
- op_ret = -1;
- op_errno = ENOMEM;
- goto unwind;
- }
-
- switch (cmd) {
- case F_SETLKW:
- can_block = 1;
- reqlock->frame = frame;
- reqlock->this = this;
- reqlock->fd = fd;
-
- /* fall through */
-
- case F_SETLK:
- memcpy (&reqlock->user_flock, flock, sizeof (struct flock));
- ret = pl_setlk (this, pinode, reqlock,
- can_block, GF_LOCK_INTERNAL);
-
- if (ret == -1) {
- if (can_block)
- goto out;
-
- gf_log (this->name, GF_LOG_TRACE, "Returning EAGAIN");
- op_errno = EAGAIN;
- __destroy_lock (reqlock);
- goto unwind;
- }
- break;
-
- default:
- op_errno = ENOTSUP;
- gf_log (this->name, GF_LOG_ERROR,
- "Unexpected case in finodelk (cmd=%d). "
- "Please file a bug report at http://bugs.gluster.com",
- cmd);
- goto unwind;
- }
-
- op_ret = 0;
-
-unwind:
- STACK_UNWIND (frame, op_ret, op_errno);
-out:
- return 0;
-}
-
-
-/**
- * types_conflict - do two types of lock conflict?
- * @t1: type
- * @t2: type
- *
- * two read locks do not conflict
- * any other case conflicts
- */
-
-static int
-types_conflict (entrylk_type t1, entrylk_type t2)
-{
- return !((t1 == ENTRYLK_RDLCK) && (t2 == ENTRYLK_RDLCK));
-}
-
-/**
- * all_names - does a basename represent all names?
- * @basename: name to check
- */
-
-#define all_names(basename) ((basename == NULL) ? 1 : 0)
-
-/**
- * names_conflict - do two names conflict?
- * @n1: name
- * @n2: name
- */
-
-static int
-names_conflict (const char *n1, const char *n2)
-{
- return all_names (n1) || all_names (n2) || !strcmp (n1, n2);
-}
-
-
-static int
-names_equal (const char *n1, const char *n2)
-{
- return (n1 == NULL && n2 == NULL) || (n1 && n2 && !strcmp (n1, n2));
-}
-
-/**
- * lock_grantable - is this lock grantable?
- * @inode: inode in which to look
- * @basename: name we're trying to lock
- * @type: type of lock
- */
-
-static pl_entry_lock_t *
-__lock_grantable (pl_inode_t *pinode, const char *basename, entrylk_type type)
-{
- pl_entry_lock_t *lock = NULL;
-
- if (list_empty (&pinode->dir_list))
- return NULL;
-
- list_for_each_entry (lock, &pinode->dir_list, inode_list) {
- if (names_conflict (lock->basename, basename) &&
- types_conflict (lock->type, type))
- return lock;
- }
-
- return NULL;
-}
-
-/**
- * find_most_matching_lock - find the lock struct which most matches in order of:
- * lock on the exact basename ||
- * an all_names lock
- *
- *
- * @inode: inode in which to look
- * @basename: name to search for
- */
-
-static pl_entry_lock_t *
-__find_most_matching_lock (pl_inode_t *pinode, const char *basename)
-{
- pl_entry_lock_t *lock;
- pl_entry_lock_t *all = NULL;
- pl_entry_lock_t *exact = NULL;
-
- if (list_empty (&pinode->dir_list))
- return NULL;
-
- list_for_each_entry (lock, &pinode->dir_list, inode_list) {
- if (all_names (lock->basename))
- all = lock;
- else if (names_equal (lock->basename, basename))
- exact = lock;
- }
-
- return (exact ? exact : all);
-}
-
-
-/**
- * insert_new_lock - insert a new dir lock into the inode with the given parameters
- * @pinode: inode to insert into
- * @basename: basename for the lock
- * @type: type of the lock
- */
-
-static pl_entry_lock_t *
-new_entrylk_lock (pl_inode_t *pinode, const char *basename, entrylk_type type,
- transport_t *trans)
-{
- pl_entry_lock_t *newlock = NULL;
-
- newlock = CALLOC (sizeof (pl_entry_lock_t), 1);
- if (!newlock) {
- goto out;
- }
-
- newlock->basename = basename ? strdup (basename) : NULL;
- newlock->type = type;
- newlock->trans = trans;
-
- if (type == ENTRYLK_RDLCK)
- newlock->read_count = 1;
-
- INIT_LIST_HEAD (&newlock->inode_list);
- INIT_LIST_HEAD (&newlock->blocked_locks);
-
-out:
- return newlock;
-}
-
-/**
- * lock_name - lock a name in a directory
- * @inode: inode for the directory in which to lock
- * @basename: name of the entry to lock
- * if null, lock the entire directory
- *
- * the entire directory being locked is represented as: a single
- * pl_entry_lock_t present in the entrylk_locks list with its
- * basename = NULL
- */
-
-int
-__lock_name (pl_inode_t *pinode, const char *basename, entrylk_type type,
- call_frame_t *frame, xlator_t *this, int nonblock)
-{
- pl_entry_lock_t *lock = NULL;
- pl_entry_lock_t *conf = NULL;
-
- transport_t *trans = NULL;
-
- int ret = -EINVAL;
-
- trans = frame->root->trans;
-
- conf = __lock_grantable (pinode, basename, type);
- if (conf) {
- ret = -EAGAIN;
- if (nonblock)
- goto out;
-
- lock = new_entrylk_lock (pinode, basename, type, trans);
-
- if (!lock) {
- ret = -ENOMEM;
- goto out;
- }
-
- gf_log (this->name, GF_LOG_TRACE,
- "Blocking lock: {pinode=%p, basename=%s}",
- pinode, basename);
-
- lock->frame = frame;
- lock->this = this;
- lock->blocked = 1;
-
- list_add (&lock->blocked_locks, &conf->blocked_locks);
-
-
- goto out;
- }
-
- switch (type) {
- case ENTRYLK_RDLCK:
- lock = __find_most_matching_lock (pinode, basename);
-
- if (lock && names_equal (lock->basename, basename)) {
- lock->read_count++;
-
- FREE (lock->basename);
- FREE (lock);
-
- lock = NULL;
- } else {
- lock = new_entrylk_lock (pinode, basename, type, trans);
-
- if (!lock) {
- ret = -ENOMEM;
- goto out;
- }
-
- list_add (&lock->inode_list, &pinode->dir_list);
- }
- break;
-
- case ENTRYLK_WRLCK:
- lock = new_entrylk_lock (pinode, basename, type, trans);
-
- if (!lock) {
- ret = -ENOMEM;
- goto out;
- }
-
- list_add (&lock->inode_list, &pinode->dir_list);
- break;
- }
-
- ret = 0;
-out:
- return ret;
-}
-
-
-/**
- * unlock_name - unlock a name in a directory
- * @inode: inode for the directory to unlock in
- * @basename: name of the entry to unlock
- * if null, unlock the entire directory
- */
-
-pl_entry_lock_t *
-__unlock_name (pl_inode_t *pinode, const char *basename, entrylk_type type)
-{
- pl_entry_lock_t *lock = NULL;
- pl_entry_lock_t *ret_lock = NULL;
-
- lock = __find_most_matching_lock (pinode, basename);
-
- if (!lock) {
- gf_log ("locks", GF_LOG_DEBUG,
- "unlock on %s (type=%s) attempted but no matching lock found",
- basename, type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" :
- "ENTRYLK_WRLCK");
- goto out;
- }
-
- if (names_equal (lock->basename, basename)
- && lock->type == type) {
- if (type == ENTRYLK_RDLCK) {
- lock->read_count--;
- }
- if (type == ENTRYLK_WRLCK || lock->read_count == 0) {
- list_del (&lock->inode_list);
- ret_lock = lock;
- }
- } else {
- gf_log ("locks", GF_LOG_DEBUG,
- "Unlock for a non-existing lock!");
- goto out;
- }
-
-out:
- return ret_lock;
-}
-
-
-void
-__grant_blocked_entry_locks (xlator_t *this, pl_inode_t *pl_inode,
- pl_entry_lock_t *lock,
- struct list_head *granted)
-{
- int bl_ret = 0;
- pl_entry_lock_t *bl = NULL;
- pl_entry_lock_t *tmp = NULL;
-
- list_for_each_entry_safe (bl, tmp, &lock->blocked_locks,
- blocked_locks) {
- list_del_init (&bl->blocked_locks);
-
- /* TODO: error checking */
-
- gf_log ("locks", GF_LOG_TRACE,
- "Trying to unblock: {pinode=%p, basename=%s}",
- pl_inode, bl->basename);
-
- bl_ret = __lock_name (pl_inode, bl->basename, bl->type,
- bl->frame, bl->this, 0);
-
- if (bl_ret == 0) {
- list_add (&bl->blocked_locks, granted);
- } else {
- if (bl->basename)
- FREE (bl->basename);
- FREE (bl);
- }
- }
- return;
-}
-
-
-void
-grant_blocked_entry_locks (xlator_t *this, pl_inode_t *pl_inode,
- pl_entry_lock_t *unlocked)
-{
- struct list_head granted_list;
- pl_entry_lock_t *tmp = NULL;
- pl_entry_lock_t *lock = NULL;
-
- INIT_LIST_HEAD (&granted_list);
-
- pthread_mutex_lock (&pl_inode->mutex);
- {
- __grant_blocked_entry_locks (this, pl_inode, unlocked,
- &granted_list);
- }
- pthread_mutex_unlock (&pl_inode->mutex);
-
- list_for_each_entry_safe (lock, tmp, &granted_list, blocked_locks) {
- list_del_init (&lock->blocked_locks);
-
- STACK_UNWIND (lock->frame, 0, 0);
-
- FREE (lock->basename);
- FREE (lock);
- }
-
- FREE (unlocked->basename);
- FREE (unlocked);
-
- return;
-}
-
-
-/**
- * release_entry_locks_for_transport: release all entry locks from this
- * transport for this loc_t
- */
-
-static int
-release_entry_locks_for_transport (xlator_t *this, pl_inode_t *pinode,
- transport_t *trans)
-{
- pl_entry_lock_t *lock;
- pl_entry_lock_t *tmp;
- struct list_head granted;
-
- INIT_LIST_HEAD (&granted);
-
- pthread_mutex_lock (&pinode->mutex);
- {
- if (list_empty (&pinode->dir_list)) {
- goto unlock;
- }
-
- list_for_each_entry_safe (lock, tmp, &pinode->dir_list,
- inode_list) {
- if (lock->trans != trans)
- continue;
-
- list_del_init (&lock->inode_list);
- __grant_blocked_entry_locks (this, pinode, lock,
- &granted);
-
- FREE (lock->basename);
- FREE (lock);
- }
- }
-unlock:
- pthread_mutex_unlock (&pinode->mutex);
-
- list_for_each_entry_safe (lock, tmp, &granted, blocked_locks) {
- list_del_init (&lock->blocked_locks);
-
- STACK_UNWIND (lock->frame, 0, 0);
-
- FREE (lock->basename);
- FREE (lock);
- }
-
- return 0;
-}
-
-
-/**
- * pl_entrylk:
- *
- * Locking on names (directory entries)
- */
-
-int
-pl_entrylk (call_frame_t *frame, xlator_t *this,
- const char *volume, loc_t *loc, const char *basename,
- entrylk_cmd cmd, entrylk_type type)
-{
- int32_t op_ret = -1;
- int32_t op_errno = 0;
-
- transport_t * transport = NULL;
- pid_t pid = -1;
-
- pl_inode_t * pinode = NULL;
- int ret = -1;
- pl_entry_lock_t *unlocked = NULL;
- char unwind = 1;
-
-
- pinode = pl_inode_get (this, loc->inode);
- if (!pinode) {
- gf_log (this->name, GF_LOG_ERROR,
- "Out of memory.");
- op_errno = ENOMEM;
- goto out;
- }
-
- pid = frame->root->pid;
- transport = frame->root->trans;
-
- if (pid == 0) {
- /*
- this is a special case that means release
- all locks from this transport
- */
-
- gf_log (this->name, GF_LOG_TRACE,
- "Releasing locks for transport %p", transport);
-
- release_entry_locks_for_transport (this, pinode, transport);
- op_ret = 0;
-
- goto out;
- }
-
- switch (cmd) {
- case ENTRYLK_LOCK:
- pthread_mutex_lock (&pinode->mutex);
- {
- ret = __lock_name (pinode, basename, type,
- frame, this, 0);
- }
- pthread_mutex_unlock (&pinode->mutex);
-
- if (ret < 0) {
- if (ret == -EAGAIN)
- unwind = 0;
- op_errno = -ret;
- goto out;
- }
-
- break;
-
- case ENTRYLK_LOCK_NB:
- pthread_mutex_lock (&pinode->mutex);
- {
- ret = __lock_name (pinode, basename, type,
- frame, this, 1);
- }
- pthread_mutex_unlock (&pinode->mutex);
-
- if (ret < 0) {
- op_errno = -ret;
- goto out;
- }
-
- break;
-
- case ENTRYLK_UNLOCK:
- pthread_mutex_lock (&pinode->mutex);
- {
- unlocked = __unlock_name (pinode, basename, type);
- }
- pthread_mutex_unlock (&pinode->mutex);
-
- if (unlocked)
- grant_blocked_entry_locks (this, pinode, unlocked);
-
- break;
-
- default:
- gf_log (this->name, GF_LOG_ERROR,
- "Unexpected case in entrylk (cmd=%d). Please file"
- "a bug report at http://bugs.gluster.com", cmd);
- goto out;
- }
-
- op_ret = 0;
-out:
- if (unwind) {
- STACK_UNWIND (frame, op_ret, op_errno);
- }
-
- return 0;
-}
-
-
-/**
- * pl_entrylk:
- *
- * Locking on names (directory entries)
- */
-
-int
-pl_fentrylk (call_frame_t *frame, xlator_t *this,
- const char *volume, fd_t *fd, const char *basename,
- entrylk_cmd cmd, entrylk_type type)
-{
- int32_t op_ret = -1;
- int32_t op_errno = 0;
-
- transport_t * transport = NULL;
- pid_t pid = -1;
-
- pl_inode_t * pinode = NULL;
- int ret = -1;
- pl_entry_lock_t *unlocked = NULL;
- char unwind = 1;
-
- pinode = pl_inode_get (this, fd->inode);
- if (!pinode) {
- gf_log (this->name, GF_LOG_ERROR,
- "Out of memory :(");
- goto out;
- }
-
- pid = frame->root->pid;
- transport = frame->root->trans;
-
- if (pid == 0) {
- /*
- this is a special case that means release
- all locks from this transport
- */
-
- gf_log (this->name, GF_LOG_TRACE,
- "Releasing locks for transport %p", transport);
-
- release_entry_locks_for_transport (this, pinode, transport);
- op_ret = 0;
- goto out;
- }
-
- switch (cmd) {
- case ENTRYLK_LOCK:
- pthread_mutex_lock (&pinode->mutex);
- {
- ret = __lock_name (pinode, basename, type,
- frame, this, 0);
- }
- pthread_mutex_unlock (&pinode->mutex);
-
- if (ret < 0) {
- if (ret == -EAGAIN)
- unwind = 0;
- op_errno = -ret;
- goto out;
- }
- break;
-
- case ENTRYLK_LOCK_NB:
- pthread_mutex_lock (&pinode->mutex);
- {
- ret = __lock_name (pinode, basename, type,
- frame, this, 1);
- }
- pthread_mutex_unlock (&pinode->mutex);
-
- if (ret < 0) {
- op_errno = -ret;
- goto out;
- }
- break;
-
- case ENTRYLK_UNLOCK:
- pthread_mutex_lock (&pinode->mutex);
- {
- unlocked = __unlock_name (pinode, basename, type);
- }
- pthread_mutex_unlock (&pinode->mutex);
-
- if (unlocked)
- grant_blocked_entry_locks (this, pinode, unlocked);
- break;
-
- default:
- gf_log (this->name, GF_LOG_ERROR,
- "Unexpected case in fentrylk (cmd=%d). "
- "Please file a bug report at http://bugs.gluster.com",
- cmd);
- goto out;
- }
-
- op_ret = 0;
-out:
- if (unwind) {
- STACK_UNWIND (frame, op_ret, op_errno);
- }
-
- return 0;
-}