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From 8863bc3638ca8b3a2c6105d35f5a9113b5796dd5 Mon Sep 17 00:00:00 2001
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From: Susant Palai <spalai@redhat.com>
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Date: Mon, 21 May 2018 11:51:47 +0530
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Subject: [PATCH 296/305] cluster/dht: Increase failure count for lookup
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failure in remove-brick op
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An entry from readdirp might get renamed just before migration leading to
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lookup failures. For such lookup failure, remove-brick process does not
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see any increment in failure count. Though there is a warning message
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after remove-brick commit for the user to check in the decommissioned brick
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for any files those are not migrated, it's better to increase the failure count
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so that user can check in the decommissioned bricks for files before commit.
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Note: This can result in false negative cases for rm -rf interaction with
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remove-brick op, where remove-brick shows non-zero failed count, but the
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entry was actually deleted by user.
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upstream patch: https://review.gluster.org/#/c/20044/
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> Fixes :bz#1580269
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> Change-Id: Icd1047ab9edc1d5bfc231a1f417a7801c424917c
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> fixes: bz#1580269
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> Signed-off-by: Susant Palai <spalai@redhat.com>
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Change-Id: Icd1047ab9edc1d5bfc231a1f417a7801c424917c
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BUG: 1577051
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(cherry-picked from upstream: https://review.gluster.org/#/c/20044/)
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Signed-off-by: Susant Palai <spalai@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/139989
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
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---
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xlators/cluster/dht/src/dht-rebalance.c | 34 ++++++++++++++++++++++++++++++---
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1 file changed, 31 insertions(+), 3 deletions(-)
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diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
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index f03931f..b9078e0 100644
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--- a/xlators/cluster/dht/src/dht-rebalance.c
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+++ b/xlators/cluster/dht/src/dht-rebalance.c
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@@ -2713,6 +2713,19 @@ gf_defrag_migrate_single_file (void *opaque)
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DHT_MSG_MIGRATE_FILE_FAILED,
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"Migrate file failed: %s lookup failed",
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entry_loc.path);
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+
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+ /* Increase failure count only for remove-brick op, so that
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+ * user is warned to check the removed-brick for any files left
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+ * unmigrated
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+ */
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+ if (conf->decommission_subvols_cnt) {
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+ LOCK (&defrag->lock);
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+ {
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+ defrag->total_failures += 1;
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+ }
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+ UNLOCK (&defrag->lock);
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+ }
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+
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ret = 0;
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goto out;
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}
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@@ -3722,8 +3735,11 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
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DHT_MSG_DIR_LOOKUP_FAILED,
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"Dir:%s renamed or removed. Skipping",
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loc->path);
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- ret = 0;
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- goto out;
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+ if (conf->decommission_subvols_cnt) {
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+ defrag->total_failures++;
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+ }
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+ ret = 0;
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+ goto out;
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} else {
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gf_msg (this->name, GF_LOG_ERROR, -ret,
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DHT_MSG_DIR_LOOKUP_FAILED,
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@@ -3744,6 +3760,9 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
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ret = syncop_opendir (this, loc, fd, NULL, NULL);
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if (ret) {
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if (-ret == ENOENT || -ret == ESTALE) {
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+ if (conf->decommission_subvols_cnt) {
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+ defrag->total_failures++;
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+ }
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ret = 0;
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goto out;
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}
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@@ -3763,6 +3782,9 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
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{
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if (ret < 0) {
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if (-ret == ENOENT || -ret == ESTALE) {
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+ if (conf->decommission_subvols_cnt) {
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+ defrag->total_failures++;
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+ }
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ret = 0;
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goto out;
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}
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@@ -3868,7 +3890,10 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
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DHT_MSG_DIR_LOOKUP_FAILED,
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"Dir:%s renamed or removed. "
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"Skipping", loc->path);
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- ret = 0;
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+ ret = 0;
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+ if (conf->decommission_subvols_cnt) {
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+ defrag->total_failures++;
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+ }
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continue;
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} else {
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gf_msg (this->name, GF_LOG_ERROR, -ret,
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@@ -3931,6 +3956,9 @@ gf_defrag_fix_layout (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc,
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"Setxattr failed. Dir %s "
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"renamed or removed",
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loc->path);
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+ if (conf->decommission_subvols_cnt) {
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+ defrag->total_failures++;
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+ }
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ret = 0;
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} else {
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gf_msg (this->name, GF_LOG_ERROR, -ret,
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--
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1.8.3.1
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