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authorRavishankar N <ravishankar@redhat.com>2015-11-25 09:49:19 +0530
committerAtin Mukherjee <amukherj@redhat.com>2015-12-15 22:17:14 -0800
commit6e635284a4411b816d4d860a28262c9e6dc4bd6a (patch)
tree26cfc4129b2632ce1aa3891e31ac7031a53c54b4 /xlators/cluster/afr
parent55f4e8a74e89d61c97e79474c4488ba0bf40a3c1 (diff)
glusterd/afr: store afr pending xattrs as a volume option
Problem: When AFR xlator initialises, it uses the name of the client xlators below it for storing the pending changelogs (xattrs). This can be problem when some other xlator is loaded in between AFR and the client. Though that is a trivial 'traverse-graph-till-the-client-and-use-the-name' fix in AFR's init(), there are other issues like when there's no client xlator at all when, say, AFR is moved to the server side. Fix: The client xlator names are currenly unique and stored as brickinfo->brick_ids. So persist these ids as comma separated values in AFR's volume_options and use them as xattr values during init(). Change-Id: Ie761ffeb3373a4c4d85ad05c84a768c4188aa90d BUG: 1285152 Signed-off-by: Ravishankar N <ravishankar@redhat.com> Reviewed-on: http://review.gluster.org/12738 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
Diffstat (limited to 'xlators/cluster/afr')
-rw-r--r--xlators/cluster/afr/src/afr.c32
1 files changed, 23 insertions, 9 deletions
diff --git a/xlators/cluster/afr/src/afr.c b/xlators/cluster/afr/src/afr.c
index fc8940d107b..a3a4490d063 100644
--- a/xlators/cluster/afr/src/afr.c
+++ b/xlators/cluster/afr/src/afr.c
@@ -244,6 +244,8 @@ init (xlator_t *this)
int read_subvol_index = -1;
xlator_t *fav_child = NULL;
char *qtype = NULL;
+ char *xattrs_list = NULL;
+ char *ptr = NULL;
if (!this->children) {
gf_msg (this->name, GF_LOG_ERROR, 0,
@@ -397,6 +399,7 @@ init (xlator_t *this)
goto out;
}
+ GF_OPTION_INIT ("afr-pending-xattr", xattrs_list, str, out);
priv->pending_key = GF_CALLOC (sizeof (*priv->pending_key),
child_count,
gf_afr_mt_char);
@@ -404,20 +407,25 @@ init (xlator_t *this)
ret = -ENOMEM;
goto out;
}
-
- trav = this->children;
- i = 0;
- while (i < child_count) {
- priv->children[i] = trav->xlator;
-
+ ptr = gf_strdup (xattrs_list);
+ if (!ptr) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ for (i = 0, ptr = strtok (ptr, ","); ptr; ptr = strtok (NULL, ",")) {
ret = gf_asprintf (&priv->pending_key[i], "%s.%s",
- AFR_XATTR_PREFIX,
- trav->xlator->name);
- if (-1 == ret) {
+ AFR_XATTR_PREFIX, ptr);
+ if (ret == -1) {
ret = -ENOMEM;
goto out;
}
+ i++;
+ }
+ trav = this->children;
+ i = 0;
+ while (i < child_count) {
+ priv->children[i] = trav->xlator;
trav = trav->next;
i++;
}
@@ -453,6 +461,7 @@ init (xlator_t *this)
ret = 0;
out:
+ GF_FREE (ptr);
return ret;
}
@@ -776,6 +785,11 @@ struct volume_options options[] = {
.type = GF_OPTION_TYPE_STR,
.default_value = AFR_DIRTY_DEFAULT,
},
+ { .key = {"afr-pending-xattr"},
+ .type = GF_OPTION_TYPE_STR,
+ .description = "Comma seperated list of xattrs that are used to "
+ "capture information on pending heals."
+ },
{ .key = {"metadata-splitbrain-forced-heal"},
.type = GF_OPTION_TYPE_BOOL,
.default_value = "off",