features/locks: Use lock_owner from fuse in posix locks.

Signed-off-by: Pavan Vilas Sondur <pavan@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 336 (Use lock owner field from fuse in locks)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=336

4 files changed, 20 insertions, 7 deletions

diff --git a/xlators/features/locks/src/common.c b/xlators/features/locks/src/common.c
index fb011fe6a7a..17be81ff24c 100644
--- a/xlators/features/locks/src/common.c
+++ b/xlators/features/locks/src/common.c
@@ -421,7 +421,7 @@ out:
 
 /* Create a new posix_lock_t */
 posix_lock_t *
-new_posix_lock (struct flock *flock, transport_t *transport, pid_t client_pid)
+new_posix_lock (struct flock *flock, transport_t *transport, pid_t client_pid, uint64_t owner)
 {
 	posix_lock_t *lock = NULL;
 
@@ -440,6 +440,7 @@ new_posix_lock (struct flock *flock, transport_t *transport, pid_t client_pid)
 
 	lock->transport  = transport;
 	lock->client_pid = client_pid;
+        lock->owner      = owner;
 
 	INIT_LIST_HEAD (&lock->list);
 
@@ -507,8 +508,10 @@ locks_overlap (posix_lock_t *l1, posix_lock_t *l2)
 int
 same_owner (posix_lock_t *l1, posix_lock_t *l2)
 {
-	return ((l1->client_pid == l2->client_pid) &&
-		(l1->transport  == l2->transport));
+
+                return ((l1->owner == l2->owner) &&
+                        (l1->transport  == l2->transport));
+
 }
 
 
@@ -680,6 +683,7 @@ __insert_and_merge (pl_inode_t *pl_inode, posix_lock_t *lock)
                                 sum->fl_type    = lock->fl_type;
                                 sum->transport  = lock->transport;
                                 sum->client_pid = lock->client_pid;
+                                sum->owner      = lock->owner;
 
                                 __delete_lock (pl_inode, conf);
                                 __destroy_lock (conf);
@@ -694,6 +698,7 @@ __insert_and_merge (pl_inode_t *pl_inode, posix_lock_t *lock)
                                 sum->fl_type    = conf->fl_type;
                                 sum->transport  = conf->transport;
                                 sum->client_pid = conf->client_pid;
+                                sum->owner      = conf->owner;
 
                                 v = subtract_locks (sum, lock);
 
diff --git a/xlators/features/locks/src/common.h b/xlators/features/locks/src/common.h
index 292d82ce8c3..0d847f77029 100644
--- a/xlators/features/locks/src/common.h
+++ b/xlators/features/locks/src/common.h
@@ -21,7 +21,7 @@
 #define __COMMON_H__
 
 posix_lock_t *
-new_posix_lock (struct flock *flock, transport_t *transport, pid_t client_pid);
+new_posix_lock (struct flock *flock, transport_t *transport, pid_t client_pid, uint64_t owner);
 
 pl_inode_t *
 pl_inode_get (xlator_t *this, inode_t *inode);
diff --git a/xlators/features/locks/src/locks.h b/xlators/features/locks/src/locks.h
index 4738da068c9..1b234dd17fd 100644
--- a/xlators/features/locks/src/locks.h
+++ b/xlators/features/locks/src/locks.h
@@ -51,6 +51,7 @@ struct __posix_lock {
 
         transport_t       *transport;     /* to identify client node */
         pid_t              client_pid;    /* pid of client process */
+        uint64_t           owner;         /* lock owner from fuse */
 };
 typedef struct __posix_lock posix_lock_t;
 
diff --git a/xlators/features/locks/src/posix.c b/xlators/features/locks/src/posix.c
index 95941994e5c..674485576fd 100644
--- a/xlators/features/locks/src/posix.c
+++ b/xlators/features/locks/src/posix.c
@@ -77,7 +77,7 @@ pl_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 static int
 truncate_allowed (pl_inode_t *pl_inode,
                   transport_t *transport, pid_t client_pid,
-                  off_t offset)
+                  uint64_t owner, off_t offset)
 {
         posix_lock_t *l = NULL;
         posix_lock_t  region = {.list = {0, }, };
@@ -87,6 +87,7 @@ truncate_allowed (pl_inode_t *pl_inode,
         region.fl_end     = LLONG_MAX;
         region.transport  = transport;
         region.client_pid = client_pid;
+        region.owner      = owner;
 
         pthread_mutex_lock (&pl_inode->mutex);
         {
@@ -142,7 +143,8 @@ truncate_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         if (priv->mandatory
             && pl_inode->mandatory
             && !truncate_allowed (pl_inode, frame->root->trans,
-                                  frame->root->pid, local->offset)) {
+                                  frame->root->pid, frame->root->lk_owner,
+                                  local->offset)) {
                 op_ret   = -1;
                 op_errno = EAGAIN;
                 goto unwind;
@@ -454,6 +456,7 @@ pl_readv (call_frame_t *frame, xlator_t *this,
                 region.fl_end     = offset + size - 1;
                 region.transport  = frame->root->trans;
                 region.client_pid = frame->root->pid;
+                region.owner      = frame->root->lk_owner;
 
                 pthread_mutex_lock (&pl_inode->mutex);
                 {
@@ -549,6 +552,7 @@ pl_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
                 region.fl_end     = offset + iov_length (vector, count) - 1;
                 region.transport  = frame->root->trans;
                 region.client_pid = frame->root->pid;
+                region.owner      = frame->root->lk_owner;
 
                 pthread_mutex_lock (&pl_inode->mutex);
                 {
@@ -614,6 +618,7 @@ pl_lk (call_frame_t *frame, xlator_t *this,
 {
         transport_t           *transport = NULL;
         pid_t                  client_pid = 0;
+        uint64_t               owner      = 0;
         posix_locks_private_t *priv = NULL;
         pl_inode_t            *pl_inode = NULL;
         int                    op_ret = 0;
@@ -625,6 +630,7 @@ pl_lk (call_frame_t *frame, xlator_t *this,
 
         transport  = frame->root->trans;
         client_pid = frame->root->pid;
+        owner      = frame->root->lk_owner;
         priv       = this->private;
 
         pl_inode = pl_inode_get (this, fd->inode);
@@ -636,7 +642,8 @@ pl_lk (call_frame_t *frame, xlator_t *this,
                 goto unwind;
         }
 
-        reqlock = new_posix_lock (flock, transport, client_pid);
+        reqlock = new_posix_lock (flock, transport, client_pid, owner);
+
         if (!reqlock) {
                 gf_log (this->name, GF_LOG_ERROR,
                         "Out of memory.");