libglusterfsclient: Resolve path on empty caches

The earlier case was that the explicit lookups to the server
were being sent only when the parent inode was NULL. This situation
breaks when the parent inode is available in the i- or d-cache
but the child dirent is not. In such a case, no explicit lookups
were being sent to get the missing child dirent.

Now, explicit path lookup happens even if the inode for parent or basename
is not found in the caches.

This also fixes a seg-fault occuring during glusterfs_open, in my test
case, but one that could occur almost anywhere lookup code is used.
Patch adapted from Raghu's original patch.

Signed-off-by: Anand V. Avati <avati@amp.gluster.com>

1 files changed, 11 insertions, 17 deletions

diff --git a/libglusterfsclient/src/libglusterfsclient-dentry.c b/libglusterfsclient/src/libglusterfsclient-dentry.c
index 9c25e57dfbb..5c8057874e0 100644
--- a/libglusterfsclient/src/libglusterfsclient-dentry.c
+++ b/libglusterfsclient/src/libglusterfsclient-dentry.c
@@ -431,25 +431,19 @@ libgf_client_path_lookup (loc_t *loc,
                                 goto out;
                         }
                 }
-        } else {
-                gf_log ("libglusterfsclient",
-                        GF_LOG_DEBUG,
-                        "resolved path(%s) to %p(%"PRId64")/%p(%"PRId64")",
-                        loc->path, parent, (parent ? parent->ino : 0), 
-                        inode, (inode ? inode->ino : 0));
-                if (parent) {
-                        inode_unref (parent);
-                } else if (inode) {
-                        inode_unref (inode);
-                        gf_log ("libglusterfsclient",
-                                GF_LOG_ERROR,
-                                "undesired behaviour. inode(%"PRId64") for %s "
-                                "exists without parent (%s)", 
-                                inode->ino, loc->path, directory);
-                }
-                op_ret = __do_path_resolve (loc, ctx, lookup_basename);
         }
 
+        if (parent) {
+                inode_unref (parent);
+        } else if (inode) {
+                inode_unref (inode);
+                gf_log ("libglusterfsclient",
+                        GF_LOG_ERROR,
+                        "undesired behaviour. inode(%"PRId64") for %s "
+                        "exists without parent (%s)",
+                        inode->ino, loc->path, directory);
+        }
+        op_ret = __do_path_resolve (loc, ctx, lookup_basename);
 out:    
         if (pathname)
                 free (pathname);