DHT/Create : Failing to identify a linkto file in lookup_everywhere_cbk path

In case a file is not found in its cached subvol we proceed with
dht_lookup_everywhere. But as we dont add the linkto xattr to the
dictionary, we fail to identify any linkto file encountered.The
implication being we end up thinking the linkto file as a regular file
and proceed with the fop.

Change-Id: Iab02dc60e84bb1aeab49182f680c0631c33947e2
BUG: 1139170
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: http://review.gluster.org/8277
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
(cherry picked from commit 52da727e7564963a8a244fc5cb7028315e458529)
Signed-off-by: Nithya Balachandran <nbalacha@redhat.com>
Reviewed-on: http://review.gluster.org/8715
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>

1 files changed, 41 insertions, 7 deletions

diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index 57a1590e1ce..e2d6da2da81 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -1493,12 +1493,25 @@ dht_lookup (call_frame_t *frame, xlator_t *this,
 
                 local->inode = inode_ref (loc->inode);
 
-                /* NOTE: we don't require 'trusted.glusterfs.dht.linkto' attribute,
-                 *       revalidates directly go to the cached-subvolume.
-                 */
                 ret = dict_set_uint32 (local->xattr_req,
                                        conf->xattr_name, 4 * 4);
-
+                if (ret) {
+                        gf_log (this->name, GF_LOG_WARNING,
+                                "Failed to set dictionary value:key = %s for "
+                                "path %s", conf->xattr_name, loc->path);
+                        goto err;
+                }
+                /* need it in case file is not found on cached file
+                 * on revalidate path and we may encounter linkto files on
+                 * with dht_lookup_everywhere*/
+                ret = dict_set_uint32 (local->xattr_req,
+                                       conf->link_xattr_name, 256);
+                if (ret < 0) {
+                        gf_log (this->name, GF_LOG_WARNING,
+                                "Failed to set dictionary value:key = %s for "
+                                "path %s", conf->link_xattr_name, loc->path);
+                        goto err;
+                }
                 if (IA_ISDIR (local->inode->ia_type)) {
                         local->call_cnt = call_cnt = conf->subvolume_cnt;
                         for (i = 0; i < call_cnt; i++) {
@@ -1516,7 +1529,12 @@ dht_lookup (call_frame_t *frame, xlator_t *this,
                    'in-migration' state */
                 ret = dict_set_uint32 (local->xattr_req,
                                        GLUSTERFS_OPEN_FD_COUNT, 4);
-
+                if (ret) {
+                        gf_log (this->name, GF_LOG_WARNING,
+                                "Failed to set dictionary value:key = %s for "
+                                "path %s", GLUSTERFS_OPEN_FD_COUNT, loc->path);
+                        goto err;
+                }
                 /* need it for dir self-heal */
                 dht_check_and_set_acl_xattr_req (loc->inode, local->xattr_req);
 
@@ -1533,15 +1551,31 @@ dht_lookup (call_frame_t *frame, xlator_t *this,
                 /* TODO: remove the hard-coding */
                 ret = dict_set_uint32 (local->xattr_req,
                                        conf->xattr_name, 4 * 4);
+                if (ret) {
+                        gf_log (this->name, GF_LOG_WARNING,
+                                "Failed to set dictionary value:key = %s for "
+                                "path %s", conf->xattr_name, loc->path);
+                        goto err;
+                }
 
                 ret = dict_set_uint32 (local->xattr_req,
                                        conf->link_xattr_name, 256);
-
+                if (ret) {
+                        gf_log (this->name, GF_LOG_WARNING,
+                                "Failed to set dictionary value:key = %s for "
+                                "path %s", conf->link_xattr_name, loc->path);
+                        goto err;
+                }
                 /* need it for self-healing linkfiles which is
                    'in-migration' state */
                 ret = dict_set_uint32 (local->xattr_req,
                                        GLUSTERFS_OPEN_FD_COUNT, 4);
-
+                if (ret) {
+                        gf_log (this->name, GF_LOG_WARNING,
+                                "Failed to set dictionary value:key = %s for "
+                                "path %s", GLUSTERFS_OPEN_FD_COUNT, loc->path);
+                        goto err;
+                }
                 /* need it for dir self-heal */
                 dht_check_and_set_acl_xattr_req (loc->inode, local->xattr_req);