Preventing client crashing as the callings of GF_CALLOC has been failed.

As the callings of GF_CALLOC can seldom come to a failure, glusterfs client
will crash due to segment fault. We should have returned once the variables
of transaction's local can't be alloced.

Change-Id: Ia3798b8349d832b23c7825e64dbad93ebe29cd1b
BUG: 861335
Signed-off-by: linbaiye <linbaiye@gmail.com>
Reviewed-on: http://review.gluster.org/4005
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

4 files changed, 107 insertions, 31 deletions

diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index 4130adc6f17..21272c0d728 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -2618,8 +2618,11 @@ afr_flush (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
                 op_errno = -ret;
                 goto out;
         }
-        afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
-
+        ret = afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
diff --git a/xlators/cluster/afr/src/afr-dir-write.c b/xlators/cluster/afr/src/afr-dir-write.c
index 3041035416f..49cf8d45315 100644
--- a/xlators/cluster/afr/src/afr-dir-write.c
+++ b/xlators/cluster/afr/src/afr-dir-write.c
@@ -350,7 +350,11 @@ afr_create (call_frame_t *frame, xlator_t *this,
         local->transaction.main_frame = frame;
         local->transaction.basename = AFR_BASENAME (loc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -538,7 +542,11 @@ afr_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
         local->transaction.main_frame = frame;
         local->transaction.basename = AFR_BASENAME (loc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -727,7 +735,11 @@ afr_mkdir (call_frame_t *frame, xlator_t *this,
         local->transaction.main_frame = frame;
         local->transaction.basename = AFR_BASENAME (loc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -912,7 +924,11 @@ afr_link (call_frame_t *frame, xlator_t *this,
         local->transaction.main_frame   = frame;
         local->transaction.basename     = AFR_BASENAME (newloc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1102,7 +1118,11 @@ afr_symlink (call_frame_t *frame, xlator_t *this,
         local->transaction.main_frame   = frame;
         local->transaction.basename     = AFR_BASENAME (loc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1295,7 +1315,11 @@ afr_rename (call_frame_t *frame, xlator_t *this,
         local->transaction.basename     = AFR_BASENAME (oldloc->path);
         local->transaction.new_basename = AFR_BASENAME (newloc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_RENAME_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_RENAME_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1473,7 +1497,11 @@ afr_unlink (call_frame_t *frame, xlator_t *this,
         local->transaction.main_frame = frame;
         local->transaction.basename = AFR_BASENAME (loc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1657,7 +1685,11 @@ afr_rmdir (call_frame_t *frame, xlator_t *this,
         local->transaction.main_frame = frame;
         local->transaction.basename = AFR_BASENAME (loc->path);
 
-        afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_ENTRY_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
diff --git a/xlators/cluster/afr/src/afr-inode-write.c b/xlators/cluster/afr/src/afr-inode-write.c
index 148a939ca83..4c550297292 100644
--- a/xlators/cluster/afr/src/afr-inode-write.c
+++ b/xlators/cluster/afr/src/afr-inode-write.c
@@ -217,11 +217,15 @@ afr_do_writev (call_frame_t *frame, xlator_t *this)
                                                          local->cont.writev.count);
         }
 
-        afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
+        op_ret = afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
+        if (op_ret < 0) {
+            op_errno = -op_ret;
+            goto out;
+        }
 
         op_ret = 0;
 out:
-        if (op_ret == -1) {
+        if (op_ret < 0) {
                 if (transaction_frame)
                         AFR_STACK_DESTROY (transaction_frame);
                 AFR_STACK_UNWIND (writev, frame, op_ret, op_errno, NULL, NULL, NULL);
@@ -676,7 +680,11 @@ afr_truncate (call_frame_t *frame, xlator_t *this,
         local->transaction.start   = offset;
         local->transaction.len     = 0;
 
-        afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -868,11 +876,15 @@ afr_do_ftruncate (call_frame_t *frame, xlator_t *this)
         local->transaction.start   = local->cont.ftruncate.offset;
         local->transaction.len     = 0;
 
-        afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
+        op_ret = afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION);
+        if (op_ret < 0) {
+            op_errno = -op_ret;
+            goto out;
+        }
 
         op_ret = 0;
 out:
-        if (op_ret == -1) {
+        if (op_ret < 0) {
                 if (transaction_frame)
                         AFR_STACK_DESTROY (transaction_frame);
                 AFR_STACK_UNWIND (ftruncate, frame, op_ret, op_errno, NULL,
@@ -1124,7 +1136,11 @@ afr_setattr (call_frame_t *frame, xlator_t *this,
         local->transaction.start   = LLONG_MAX - 1;
         local->transaction.len     = 0;
 
-        afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1334,7 +1350,11 @@ afr_fsetattr (call_frame_t *frame, xlator_t *this,
         local->transaction.start   = LLONG_MAX - 1;
         local->transaction.len     = 0;
 
-        afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1521,7 +1541,11 @@ afr_setxattr (call_frame_t *frame, xlator_t *this,
         local->transaction.start   = LLONG_MAX - 1;
         local->transaction.len     = 0;
 
-        afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1712,7 +1736,11 @@ afr_fsetxattr (call_frame_t *frame, xlator_t *this,
         local->transaction.start  = LLONG_MAX - 1;
         local->transaction.len    = 0;
 
-        afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -1902,7 +1930,11 @@ afr_removexattr (call_frame_t *frame, xlator_t *this,
         local->transaction.start   = LLONG_MAX - 1;
         local->transaction.len     = 0;
 
-        afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        ret = afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        if (ret < 0) {
+            op_errno = -ret;
+            goto out;
+        }
 
         ret = 0;
 out:
@@ -2091,11 +2123,15 @@ afr_fremovexattr (call_frame_t *frame, xlator_t *this,
         local->transaction.start   = LLONG_MAX - 1;
         local->transaction.len     = 0;
 
-        afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        op_ret = afr_transaction (transaction_frame, this, AFR_METADATA_TRANSACTION);
+        if (op_ret < 0) {
+            op_errno = -op_ret;
+            goto out;
+        }
 
         op_ret = 0;
 out:
-        if (op_ret == -1) {
+        if (op_ret < 0) {
                 if (transaction_frame)
                         AFR_STACK_DESTROY (transaction_frame);
                 AFR_STACK_UNWIND (fremovexattr, frame, op_ret, op_errno, NULL);
diff --git a/xlators/cluster/afr/src/afr-transaction.c b/xlators/cluster/afr/src/afr-transaction.c
index be4a914d4a6..265d93b6189 100644
--- a/xlators/cluster/afr/src/afr-transaction.c
+++ b/xlators/cluster/afr/src/afr-transaction.c
@@ -1452,21 +1452,25 @@ afr_transaction (call_frame_t *frame, xlator_t *this, afr_transaction_type type)
         afr_local_t *   local = NULL;
         afr_private_t * priv  = NULL;
         fd_t            *fd   = NULL;
+        int             ret   = -1;
 
         local = frame->local;
         priv  = this->private;
 
-        afr_transaction_local_init (local, this);
+	if (local->fd && priv->eager_lock &&
+	    local->transaction.type == AFR_DATA_TRANSACTION)
+		afr_set_lk_owner (frame, this, local->fd);
+	else
+		afr_set_lk_owner (frame, this, frame->root);
+
+        ret = afr_transaction_local_init (local, this);
+        if (ret < 0) {
+            goto out;
+        }
 
         local->transaction.resume = afr_transaction_resume;
         local->transaction.type   = type;
 
-        if (local->fd && priv->eager_lock &&
-            local->transaction.type == AFR_DATA_TRANSACTION)
-                afr_set_lk_owner (frame, this, local->fd);
-        else
-                afr_set_lk_owner (frame, this, frame->root);
-
         if (_does_transaction_conflict_with_delayed_post_op (frame) &&
             local->loc.inode) {
                 fd = fd_lookup (local->loc.inode, frame->root->pid);
@@ -1481,6 +1485,7 @@ afr_transaction (call_frame_t *frame, xlator_t *this, afr_transaction_type type)
         } else {
                 afr_lock (frame, this);
         }
-
-        return 0;
+        ret = 0;
+out:
+        return ret;
 }