glusterfs/0466-cluster-ec-Change-stale-index-handling.patch

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From b603170ae5f583037b8177a9d19e56c7821edf0b Mon Sep 17 00:00:00 2001
From: Pranith Kumar K <pkarampu@redhat.com>
Date: Tue, 25 Aug 2020 04:19:54 +0530
Subject: [PATCH 466/466] cluster/ec: Change stale index handling
Problem:
Earlier approach is setting dirty bit which requires extra heal
Fix:
Send zero-xattrop which deletes stale index without any need
for extra heal.
> Fixes: #1385
> Upstream-patch: https://review.gluster.org/c/glusterfs/+/24911/
BUG: 1785714
Change-Id: I7e97a1d8b5516f7be47cae55d0e56b14332b6cae
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/209904
Tested-by: RHGS Build Bot <nigelb@redhat.com>
Tested-by: Ashish Pandey <aspandey@redhat.com>
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
---
xlators/cluster/ec/src/ec-heal.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/xlators/cluster/ec/src/ec-heal.c b/xlators/cluster/ec/src/ec-heal.c
index 6e6948b..06bafa5 100644
--- a/xlators/cluster/ec/src/ec-heal.c
+++ b/xlators/cluster/ec/src/ec-heal.c
@@ -2490,7 +2490,7 @@ out:
}
int
-ec_heal_set_dirty_without_lock(call_frame_t *frame, ec_t *ec, inode_t *inode)
+ec_heal_purge_stale_index(call_frame_t *frame, ec_t *ec, inode_t *inode)
{
int i = 0;
int ret = 0;
@@ -2520,7 +2520,6 @@ ec_heal_set_dirty_without_lock(call_frame_t *frame, ec_t *ec, inode_t *inode)
xattr[i] = dict;
on[i] = 1;
}
- dirty_xattr[EC_METADATA_TXN] = hton64(1);
ret = dict_set_static_bin(dict, EC_XATTR_DIRTY, dirty_xattr,
(sizeof(*dirty_xattr) * EC_VERSION_SIZE));
if (ret < 0) {
@@ -2621,13 +2620,10 @@ ec_heal_do(xlator_t *this, void *data, loc_t *loc, int32_t partial)
gf_msg(ec->xl->name, GF_LOG_INFO, 0, EC_MSG_HEAL_FAIL,
"Index entry needs to be purged for: %s ",
uuid_utoa(loc->gfid));
- /* We need to send xattrop to set dirty flag so that it can be
- * healed and index entry could be removed. We need not to take lock
- * on this entry to do so as we are just setting dirty flag which
- * actually increases the trusted.ec.dirty count and does not set
- * the new value.
- * This will make sure that it is not interfering in other fops.*/
- ec_heal_set_dirty_without_lock(frame, ec, loc->inode);
+ /* We need to send zero-xattrop so that stale index entry could be
+ * removed. We need not take lock on this entry to do so as
+ * xattrop on a brick is atomic. */
+ ec_heal_purge_stale_index(frame, ec, loc->inode);
} else if (need_heal == EC_HEAL_NONEED) {
gf_msg(ec->xl->name, GF_LOG_DEBUG, 0, EC_MSG_HEAL_FAIL,
"Heal is not required for : %s ", uuid_utoa(loc->gfid));
--
1.8.3.1