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authorXavier Hernandez <xhernandez@datalab.es>2016-02-15 10:59:29 +0100
committerJeff Darcy <jdarcy@redhat.com>2016-02-29 23:56:41 -0800
commit9afe93bee897c8ead507a8dadb0e0fc32ed8abf0 (patch)
treebd12300fd03cc99ebc616d9398148e91d3bc75c0 /xlators/cluster/ec/src/ec-helpers.c
parentb1cb581424305592fac5394a578b307117b22fe7 (diff)
cluster/ec: Fix invalid config check for directories
The trusted.ec.config xattr is not defined for directories. However sometimes it could be requested because the inode type of a directory can temporarily be IA_INVAL. Requesting such xattr using the xattrop fop when it doesn't exist, returns a config value full of 0's, which is invalid and caused some fops to fail. This patch filters out this case by ignoring config xattr == 0. Change-Id: Ied51c35b313ea8c3eeae27812f9bae61d3808e92 BUG: 1293223 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/13446 Smoke: Gluster Build System <jenkins@build.gluster.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Ashish Pandey <aspandey@redhat.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Diffstat (limited to 'xlators/cluster/ec/src/ec-helpers.c')
-rw-r--r--xlators/cluster/ec/src/ec-helpers.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/xlators/cluster/ec/src/ec-helpers.c b/xlators/cluster/ec/src/ec-helpers.c
index 01e5e56a9b6..c8f904ac51d 100644
--- a/xlators/cluster/ec/src/ec-helpers.c
+++ b/xlators/cluster/ec/src/ec-helpers.c
@@ -321,6 +321,19 @@ int32_t ec_dict_del_config(dict_t * dict, char * key, ec_config_t * config)
}
data = ntoh64(*(uint64_t *)ptr);
+ /* Currently we need to get the config xattr for entries of type IA_INVAL.
+ * These entries can later become IA_DIR entries (after inode_link()),
+ * which don't have a config xattr. However, since the xattr is requested
+ * using an xattrop() fop, it will always return a config full of 0's
+ * instead of saying that it doesn't exist.
+ *
+ * We need to filter out this case and consider that a config xattr == 0 is
+ * the same than a non-existant xattr. Otherwise ec_config_check() will
+ * fail.
+ */
+ if (data == 0) {
+ return -ENODATA;
+ }
config->version = (data >> 56) & 0xff;
if (config->version > EC_CONFIG_VERSION)