core, shard: Make shards inherit main file's O_DIRECT flag if present

        Backport of: http://review.gluster.org/14191

If the application opens a file with O_DIRECT, the shards'
anon fds would also need to inherit the flag. Towards this,
shard xl would be passing the odirect flag in the @flags parameter
to the WRITEV fop. This will be used in anon fd resolution
and subsequent opening by posix xl.

Change-Id: I3a0593fa46cc25e390a5762a0354b469c2a1532d
BUG: 1342903
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/14663
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>

6 files changed, 30 insertions, 21 deletions

diff --git a/xlators/cluster/afr/src/afr-transaction.c b/xlators/cluster/afr/src/afr-transaction.c
index ea1f38652d1..a20be30d3ca 100644
--- a/xlators/cluster/afr/src/afr-transaction.c
+++ b/xlators/cluster/afr/src/afr-transaction.c
@@ -2095,7 +2095,8 @@ afr_transaction_start (call_frame_t *frame, xlator_t *this)
         if (!local->transaction.eager_lock_on && local->loc.inode) {
                 fd = fd_lookup (local->loc.inode, frame->root->pid);
                 if (fd == NULL)
-                        fd = fd_lookup_anonymous (local->loc.inode);
+                        fd = fd_lookup_anonymous (local->loc.inode,
+                                                  GF_ANON_FD_FLAGS);
 
                 if (fd) {
                         afr_delayed_changelog_wake_up (this, fd);
diff --git a/xlators/features/shard/src/shard.c b/xlators/features/shard/src/shard.c
index d3e8ba330f4..c82fd0a31f1 100644
--- a/xlators/features/shard/src/shard.c
+++ b/xlators/features/shard/src/shard.c
@@ -3635,6 +3635,7 @@ shard_common_inode_write_do (call_frame_t *frame, xlator_t *this)
         shard_local_t  *local             = NULL;
         struct iovec   *vec               = NULL;
         gf_boolean_t    wind_failed       = _gf_false;
+        gf_boolean_t    odirect           = _gf_false;
         off_t           orig_offset       = 0;
         off_t           shard_offset      = 0;
         off_t           vec_offset        = 0;
@@ -3665,6 +3666,9 @@ shard_common_inode_write_do (call_frame_t *frame, xlator_t *this)
                 return 0;
         }
 
+        if ((fd->flags & O_DIRECT) && (local->fop == GF_FOP_WRITE))
+                odirect = _gf_true;
+
         while (cur_block <= last_block) {
                 if (wind_failed) {
                         shard_common_inode_write_do_cbk (frame,
@@ -3722,6 +3726,13 @@ shard_common_inode_write_do (call_frame_t *frame, xlator_t *this)
                                                                  NULL, NULL);
                                 goto next;
                         }
+
+                        if (local->fop == GF_FOP_WRITE) {
+                                if (odirect)
+                                        local->flags = O_DIRECT;
+                                else
+                                        local->flags = GF_ANON_FD_FLAGS;
+                        }
                 }
 
                 shard_common_inode_write_wind (frame, this, anon_fd,
diff --git a/xlators/nfs/server/src/nfs-fops.c b/xlators/nfs/server/src/nfs-fops.c
index e5990a1e834..167f6b7e9f7 100644
--- a/xlators/nfs/server/src/nfs-fops.c
+++ b/xlators/nfs/server/src/nfs-fops.c
@@ -1386,6 +1386,8 @@ nfs_fop_write (xlator_t *nfsx, xlator_t *xl, nfs_user_t *nfu, fd_t *fd,
         call_frame_t            *frame = NULL;
         int                     ret = -EFAULT;
         struct nfs_fop_local    *nfl = NULL;
+        int flags = 0;
+        nfs3_call_state_t       *cs = local;
 
         if ((!nfsx) || (!xl) || (!fd) || (!vector) || (!nfu) || (!srciobref))
                 return ret;
@@ -1403,8 +1405,20 @@ nfs_fop_write (xlator_t *nfsx, xlator_t *xl, nfs_user_t *nfu, fd_t *fd,
 
         iobref_add (nfl->iobref, srciob);
 */
+
+        switch (cs->writetype) {
+        case UNSTABLE:
+                break;
+        case DATA_SYNC:
+                flags |= O_DSYNC;
+                break;
+        case FILE_SYNC:
+                flags |= O_SYNC;
+                break;
+        }
+
         STACK_WIND_COOKIE (frame, nfs_fop_writev_cbk, xl, xl,xl->fops->writev,
-                           fd, vector, count, offset, fd->flags, srciobref, NULL);
+                           fd, vector, count, offset, flags, srciobref, NULL);
         ret = 0;
 err:
         if (ret < 0) {
diff --git a/xlators/nfs/server/src/nfs3.c b/xlators/nfs/server/src/nfs3.c
index 4035491359f..aa7af312b89 100644
--- a/xlators/nfs/server/src/nfs3.c
+++ b/xlators/nfs/server/src/nfs3.c
@@ -2245,24 +2245,6 @@ nfs3_write_resume (void *carg)
 
         cs->fd = fd;    /* Gets unrefd when the call state is wiped. */
 
-/*
-  enum stable_how {
-  UNSTABLE = 0,
-  DATA_SYNC = 1,
-  FILE_SYNC = 2,
-  };
-*/
-	switch (cs->writetype) {
-	case UNSTABLE:
-		break;
-	case DATA_SYNC:
-		fd->flags |= O_DSYNC;
-		break;
-	case FILE_SYNC:
-		fd->flags |= O_SYNC;
-		break;
-	}
-
         ret = __nfs3_write_resume (cs);
         if (ret < 0)
                 stat = nfs3_errno_to_nfsstat3 (-ret);
diff --git a/xlators/protocol/server/src/server-resolve.c b/xlators/protocol/server/src/server-resolve.c
index 26bf37e3308..4e6ec6a852a 100644
--- a/xlators/protocol/server/src/server-resolve.c
+++ b/xlators/protocol/server/src/server-resolve.c
@@ -458,7 +458,7 @@ resolve_anonfd_simple (call_frame_t *frame)
 
         ret = 0;
 
-        state->fd = fd_anonymous (inode);
+        state->fd = fd_anonymous_with_flags (inode, state->flags);
 out:
         if (inode)
                 inode_unref (inode);
diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
index aaa9ac1ee29..731547b84dc 100644
--- a/xlators/storage/posix/src/posix-helpers.c
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -1690,6 +1690,7 @@ __posix_fd_ctx_get (fd_t *fd, xlator_t *this, struct posix_fd **pfd_p)
 
         pfd->fd = _fd;
         pfd->dir = dir;
+        pfd->flags = fd->flags;
 
         ret = __fd_ctx_set (fd, this, (uint64_t) (long) pfd);
         if (ret != 0) {