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authorSakshi Bansal <sabansal@redhat.com>2016-04-13 16:40:40 +0530
committerRaghavendra G <rgowdapp@redhat.com>2016-04-19 00:18:30 -0700
commitabd47f27848c9bb2bf5bc371367c3d41f526ad50 (patch)
tree78c589643990efe27095971f50ab54fea19a0b1e /xlators/cluster/dht
parent26d16b90ec7f8acbe07e56e8fe1baf9c9fa1519e (diff)
quota: setting 'read-only' option in xdata to instruct DHT to not heal
When quota is enabled the quota enforcer tries to get the size of the source directory by sending nameless lookup to quotad. But if the rename is successful even on one subvol or the source layout has anomalies then this nameless lookup in quotad tries to heal the directory which requires a lock on as many subvols as it can. But src is already locked as part of rename. For rename to proceed in brick it needs to complete a cluster-wide lookup. But cluster-wide lookup in quotad is blocked on locks held by rename, hence a deadlock. To avoid this quota sends an option in xdata which instructs DHT not to heal. Change-Id: I792f9322331def0b1f4e16e88deef55d0c9f17f0 BUG: 1252244 Signed-off-by: Sakshi Bansal <sabansal@redhat.com> Reviewed-on: http://review.gluster.org/13988 Smoke: Gluster Build System <jenkins@build.gluster.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Diffstat (limited to 'xlators/cluster/dht')
-rw-r--r--xlators/cluster/dht/src/dht-common.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index b14f20bcc65..3afbc6258f3 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -250,6 +250,7 @@ dht_discover_complete (xlator_t *this, call_frame_t *discover_frame)
int heal_path = 0;
int i = 0;
loc_t loc = {0 };
+ int8_t is_read_only = 0;
local = discover_frame->local;
layout = local->layout;
@@ -265,6 +266,12 @@ dht_discover_complete (xlator_t *this, call_frame_t *discover_frame)
if (!main_frame)
return 0;
+ ret = dict_get_int8 (local->xattr_req, QUOTA_READ_ONLY_KEY,
+ &is_read_only);
+ if (ret < 0)
+ gf_msg_debug (this->name, 0, "key = %s not present in dict",
+ QUOTA_READ_ONLY_KEY);
+
if (local->file_count && local->dir_count) {
gf_msg (this->name, GF_LOG_ERROR, 0,
DHT_MSG_FILE_TYPE_MISMATCH,
@@ -311,7 +318,8 @@ dht_discover_complete (xlator_t *this, call_frame_t *discover_frame)
* healing layout of directory otherwise we don't heal.
*/
- if (local->inode && conf->randomize_by_gfid)
+ if (local->inode && conf->randomize_by_gfid &&
+ !is_read_only)
goto selfheal;
}
@@ -328,7 +336,7 @@ dht_discover_complete (xlator_t *this, call_frame_t *discover_frame)
}
}
- if (IA_ISDIR (local->stbuf.ia_type)) {
+ if (IA_ISDIR (local->stbuf.ia_type) && !is_read_only) {
for (i = 0; i < layout->cnt; i++) {
if (!source && !layout->list[i].err)
source = layout->list[i].xlator;