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authorXavi Hernandez <xhernandez@redhat.com>2018-03-20 10:57:13 +0100
committerXavi Hernandez <xhernandez@redhat.com>2018-03-21 16:27:36 +0000
commitb5f307fa5e7241dd000f0eeac27cc4638a5bccf8 (patch)
tree0631843aed393d05d8d1b1a988c52ac37dda7b62 /xlators
parent448dec703d603a150dc1f1cc231c8389ab2fb2ea (diff)
cluster/ec: fix SHD crash for null gfid's
When the self-heal daemon is doing a full sweep it uses readdirp to get extra stat information from each file. This information is obtained in two steps by the posix xlator: first the directory is read to get the entries and then each entry is stated to get additional info. Between these two steps, it's possible that the file is removed by the user, so we'll get an error, leaving stat info empty. EC's heal daemon was using the gfid blindly, causing an assert failure when protocol/client was trying to encode the gfid. To fix the problem a check has been added. If we detect a null gfid, we simply ignore it and continue healing. Change-Id: I2e4acdcecd0b6951055e50d1c37d686a2186a228 BUG: 1558016 Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
Diffstat (limited to 'xlators')
-rw-r--r--xlators/cluster/ec/src/ec-heald.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/xlators/cluster/ec/src/ec-heald.c b/xlators/cluster/ec/src/ec-heald.c
index a703379a59b..65d8b5c4284 100644
--- a/xlators/cluster/ec/src/ec-heald.c
+++ b/xlators/cluster/ec/src/ec-heald.c
@@ -301,6 +301,14 @@ ec_shd_full_heal (xlator_t *subvol, gf_dirent_t *entry, loc_t *parent,
if (!ec->shd.enabled)
return -EBUSY;
+ if (gf_uuid_is_null(entry->d_stat.ia_gfid)) {
+ /* It's possible that an entry has been removed just after
+ * being seen in a directory but before getting its stat info.
+ * In this case we'll receive a NULL gfid here. Since the file
+ * doesn't exist anymore, we can safely ignore it. */
+ return 0;
+ }
+
loc.parent = inode_ref (parent->inode);
loc.name = entry->d_name;
gf_uuid_copy (loc.gfid, entry->d_stat.ia_gfid);