fuse: do fd_resolve in fuse_getattr if fd is received

problem: With the current code, post graph switch the old fd is received for
fuse_getattr and since it is associated with old inode, it does not
have the inode ctx across xlators in new graph. Hence, dht
errored out saying "no layout" for fstat call. Hence the EINVAL.

Solution: if fd is passed, init and resolve fd to carry on getattr

test case:
- Created a single brick distributed volume
- Started untar
- Added a new-brick

Without this fix, untar used to abort with ERROR.

Change-Id: I5805c463fb9a04ba5c24829b768127097ff8b9f9
fixes: bz#1566207
Signed-off-by: Susant Palai <spalai@redhat.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 1d105af04f1..f509d84a15b 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -921,7 +921,7 @@ fuse_root_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 void
 fuse_getattr_resume (fuse_state_t *state)
 {
-        if (!state->loc.inode) {
+        if (!state->loc.inode && !(state->fd && state->fd->inode)) {
                 gf_log ("glusterfs-fuse", GF_LOG_ERROR,
                         "%"PRIu64": GETATTR %"PRIu64" (%s) resolution failed",
                         state->finh->unique, state->finh->nodeid,
@@ -932,9 +932,9 @@ fuse_getattr_resume (fuse_state_t *state)
                 return;
         }
 
-        if (!IA_ISDIR (state->loc.inode->ia_type)) {
-                if (state->fd == NULL)
-                        state->fd = fd_lookup (state->loc.inode, state->finh->pid);
+        if (state->fd == NULL && !IA_ISDIR (state->loc.inode->ia_type)) {
+                state->fd = fd_lookup (state->loc.inode, state->finh->pid);
+
                 if (state->fd == NULL)
                         state->fd = fd_lookup (state->loc.inode, 0);
         }
@@ -976,7 +976,10 @@ fuse_getattr (xlator_t *this, fuse_in_header_t *finh, void *msg,
                 state->fd = fd_ref ((fd_t *)fgi->fh);
 #endif
 
-        fuse_resolve_inode_init (state, &state->resolve, state->finh->nodeid);
+        if (state->fd)
+                fuse_resolve_fd_init (state, &state->resolve, state->fd);
+        else
+                fuse_resolve_inode_init (state, &state->resolve, state->finh->nodeid);
 
         fuse_resolve_and_resume (state, fuse_getattr_resume);
 }