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authorVenkatesh Somyajulu <vsomyaju@redhat.com>2014-09-10 20:57:08 +0530
committerNiels de Vos <ndevos@redhat.com>2014-09-17 08:33:13 -0700
commitb459b74b7191783a1392070bc3cd02ffad154868 (patch)
tree88750d5d627f3c8a63f11a789d1e85cd68ecce4a /xlators
parent6ad6661a2d49b444e18859391ba1bf8d71c28a39 (diff)
dht/rebalance: Do not allow rebalance when gfid mismatch found
Due to race condition, it may so happen that, gfid obtained in readdirp and gfid found by lookup are different for a given name. in that case do no allow the rebalance. Readdirp of an entry will bring the gfid, which will be stored in the inode through inode_link, and when lookup is done and gfid brought by lookup is different from the one stored in the inode, client3_3_lookup_cbk will return ESATLE and error will be captured by rebalance process. Cherry picked from commit 72c7afcd: > Change-Id: Iad839177ef9b80c1dd0e87f3406bcf4cb018e6fa > BUG: 1104653 > Signed-off-by: Venkatesh Somyajulu <vsomyaju@redhat.com> > Reviewed-on: http://review.gluster.org/7973 > Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Krutika Dhananjay <kdhananj@redhat.com> > Reviewed-by: Vijay Bellur <vbellur@redhat.com> Also merged the oneline change from commit de22a20a: > Change-Id: I979b7333efa93b1e8f4c73ccf048d48e308f9289 > BUG: 1104653 > Signed-off-by: Venkatesh Somyajulu <vsomyaju@redhat.com> > Reviewed-on: http://review.gluster.org/8073 > Reviewed-by: Krutika Dhananjay <kdhananj@redhat.com> > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Raghavendra G <rgowdapp@redhat.com> > Reviewed-by: Vijay Bellur <vbellur@redhat.com> Change-Id: Iad839177ef9b80c1dd0e87f3406bcf4cb018e6fa BUG: 1138922 Signed-off-by: Nithya Balachandran <nbalacha@redhat.com> Reviewed-on: http://review.gluster.org/8712 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
Diffstat (limited to 'xlators')
-rw-r--r--xlators/cluster/dht/src/dht-rebalance.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
index 9446dbe03ac..f8eeb1fd25a 100644
--- a/xlators/cluster/dht/src/dht-rebalance.c
+++ b/xlators/cluster/dht/src/dht-rebalance.c
@@ -1395,6 +1395,7 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
off_t offset = 0;
struct iatt iatt = {0,};
int readdirp_errno = 0;
+ inode_t *linked_inode = NULL, *inode = NULL;
ret = syncop_lookup (this, loc, NULL, &iatt, NULL, NULL);
if (ret) {
@@ -1462,6 +1463,7 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
continue;
loc_wipe (&entry_loc);
+
ret =dht_build_child_loc (this, &entry_loc, loc,
entry->d_name);
if (ret) {
@@ -1477,9 +1479,23 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
continue;
}
- entry_loc.inode->ia_type = entry->d_stat.ia_type;
uuid_copy (entry_loc.gfid, entry->d_stat.ia_gfid);
+
+ /*In case the gfid stored in the inode by inode_link
+ * and the gfid obtained in the lookup differs, then
+ * client3_3_lookup_cbk will return ESTALE and proper
+ * error will be captured
+ */
+
+ linked_inode = inode_link (entry_loc.inode, loc->inode,
+ entry->d_name,
+ &entry->d_stat);
+
+ inode = entry_loc.inode;
+ entry_loc.inode = linked_inode;
+ inode_unref (inode);
+
if (uuid_is_null (loc->gfid)) {
gf_log (this->name, GF_LOG_ERROR, "%s/%s"
" gfid not present", loc->path,