cluster/ec: Fix dictionary compare function

If both dicts are NULL then equal. If one of the dicts is NULL but the other
has only ignorable keys then also they are equal. If both dicts are non-null
then check if for each non-ignorable key, values are same or not.  value_ignore
function is used to skip comparing values for the keys which must be present in
both the dictionaries but the value could be different.

geo-rep's stime xattr doesn't need to be present in list xattr but when
getxattr comes on stime xattr even if there aren't enough responses with the
xattr we should still give out an answer which is maximum of the stimes
available.

Change-Id: I8de2ceaa2db785b797f302f585d88e73b154167d
BUG: 1216303
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/10078
Reviewed-on: http://review.gluster.org/10690
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System

1 files changed, 6 insertions, 35 deletions

diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index c6501cda97a..8fbca0b6f42 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -1250,48 +1250,19 @@ afr_is_xattr_ignorable (char *key)
         return _gf_false;
 }
 
-int
-xattr_is_equal (dict_t *this, char *key1, data_t *value1, void *data)
+static gf_boolean_t
+afr_xattr_match (dict_t *this, char *key1, data_t *value1, void *data)
 {
-        dict_t *xattr2 = (dict_t *)data;
-        data_t *value2 = NULL;
-
-        if (afr_is_xattr_ignorable (key1))
-                return 0;
-
-        value2 = dict_get (xattr2, key1);
-        if (!value2)
-                return -1;
-
-        if (value1->len != value2->len)
-                return -1;
-        if(memcmp(value1->data, value2->data, value1->len))
-                return -1;
-        else
-                return 0;
+        if (!afr_is_xattr_ignorable (key1))
+                return _gf_true;
 
+        return _gf_false;
 }
 
-/* To conclude that both dicts are equal, we need to check if
- * 1) For every key-val pair in dict1, a match is present in dict2
- * 2) For every key-val pair in dict2, a match is present in dict1
- * We need to do both because ignoring glusterfs' internal xattrs
- * happens only in xattr_is_equal().
- */
 gf_boolean_t
 afr_xattrs_are_equal (dict_t *dict1, dict_t *dict2)
 {
-        int ret = 0;
-
-        ret = dict_foreach (dict1, xattr_is_equal, dict2);
-        if (ret == -1)
-                return _gf_false;
-
-        ret = dict_foreach (dict2, xattr_is_equal, dict1);
-        if (ret == -1)
-                 return _gf_false;
-
-        return _gf_true;
+        return are_dicts_equal (dict1, dict2, afr_xattr_match, NULL);
 }
 
 static int