cluster/afr: do complete split-brain check in all the fd based fops

fd based operations such as readv checked only for data split brain
instead of complete split-brain (i.e both data + metadata) assuming that
open would have done the complete split-brain check. However open-behind
would have unwound open, without winding to afr thus preventing the complete
split-brain check and some appliations will be able to read the contents
of the file even though the file has metadata split-brain. So let all
the fd based fops do a defensive check of complete split-brain.

Change-Id: I0ea52f782b371ce73e8e1c61f9def438fce1bd28
BUG: 846240
Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com>
Reviewed-on: http://review.gluster.org/4620
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

4 files changed, 33 insertions, 19 deletions

diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index 801346406d7..e66be0358c9 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -325,21 +325,6 @@ out:
 }
 
 gf_boolean_t
-afr_is_data_split_brain (xlator_t *this, inode_t *inode)
-{
-        afr_inode_ctx_t *ctx = NULL;
-        gf_boolean_t    spb  = _gf_false;
-
-        ctx = afr_inode_ctx_get (inode, this);
-        if (!ctx)
-                goto out;
-        if (ctx->data_spb == SPB)
-                spb = _gf_true;
-out:
-        return spb;
-}
-
-gf_boolean_t
 afr_is_opendir_done (xlator_t *this, inode_t *inode)
 {
         afr_inode_params_t params = {0};
diff --git a/xlators/cluster/afr/src/afr-inode-read.c b/xlators/cluster/afr/src/afr-inode-read.c
index 40d57b6f9da..1263749b7fd 100644
--- a/xlators/cluster/afr/src/afr-inode-read.c
+++ b/xlators/cluster/afr/src/afr-inode-read.c
@@ -348,6 +348,11 @@ afr_fstat (call_frame_t *frame, xlator_t *this,
 
         VALIDATE_OR_GOTO (fd->inode, out);
 
+        if (afr_is_split_brain (this, fd->inode)) {
+                op_errno = EIO;
+                goto out;
+        }
+
         AFR_LOCAL_ALLOC_OR_GOTO (frame->local, out);
         local = frame->local;
 
@@ -1658,6 +1663,10 @@ afr_fgetxattr (call_frame_t *frame, xlator_t *this,
 
         children = priv->children;
 
+        if (afr_is_split_brain (this, fd->inode)) {
+                op_errno = EIO;
+                goto out;
+        }
         AFR_LOCAL_ALLOC_OR_GOTO (local, out);
         frame->local = local;
 
@@ -1813,7 +1822,7 @@ afr_readv (call_frame_t *frame, xlator_t *this,
         priv     = this->private;
         children = priv->children;
 
-        if (afr_is_data_split_brain (this, fd->inode)) {
+        if (afr_is_split_brain (this, fd->inode)) {
                 op_errno = EIO;
                 goto out;
         }
diff --git a/xlators/cluster/afr/src/afr-inode-write.c b/xlators/cluster/afr/src/afr-inode-write.c
index c619536ca17..99fa027d03c 100644
--- a/xlators/cluster/afr/src/afr-inode-write.c
+++ b/xlators/cluster/afr/src/afr-inode-write.c
@@ -549,6 +549,11 @@ afr_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
 
         priv = this->private;
 
+        if (afr_is_split_brain (this, fd->inode)) {
+                op_errno = EIO;
+                goto out;
+        }
+
         QUORUM_CHECK(writev,out);
 
         AFR_LOCAL_ALLOC_OR_GOTO (frame->local, out);
@@ -1005,6 +1010,10 @@ afr_ftruncate (call_frame_t *frame, xlator_t *this,
 
         priv = this->private;
 
+        if (afr_is_split_brain (this, fd->inode)) {
+                op_errno = EIO;
+                goto out;
+        }
         QUORUM_CHECK(ftruncate,out);
 
         AFR_LOCAL_ALLOC_OR_GOTO (frame->local, out);
@@ -1410,6 +1419,11 @@ afr_fsetattr (call_frame_t *frame, xlator_t *this,
 
         priv = this->private;
 
+        if (afr_is_split_brain (this, fd->inode)) {
+                op_errno = EIO;
+                goto out;
+        }
+
         QUORUM_CHECK(fsetattr,out);
 
         transaction_frame = copy_frame (frame);
@@ -1797,6 +1811,11 @@ afr_fsetxattr (call_frame_t *frame, xlator_t *this,
 
         priv = this->private;
 
+        if (afr_is_split_brain (this, fd->inode)) {
+                op_errno = EIO;
+                goto out;
+        }
+
         QUORUM_CHECK(fsetxattr,out);
 
         AFR_LOCAL_ALLOC_OR_GOTO (local, out);
@@ -2182,6 +2201,10 @@ afr_fremovexattr (call_frame_t *frame, xlator_t *this,
         VALIDATE_OR_GOTO (this->private, out);
 
         priv = this->private;
+        if (afr_is_split_brain (this, fd->inode)) {
+                op_errno = EIO;
+                goto out;
+        }
 
         QUORUM_CHECK(fremovexattr, out);
 
diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index cc0d0107763..f4ebf435699 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -859,9 +859,6 @@ afr_frame_return (call_frame_t *frame);
 gf_boolean_t
 afr_is_split_brain (xlator_t *this, inode_t *inode);
 
-gf_boolean_t
-afr_is_data_split_brain (xlator_t *this, inode_t *inode);
-
 void
 afr_set_split_brain (xlator_t *this, inode_t *inode, afr_spb_state_t mdata_spb,
                      afr_spb_state_t data_spb);