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From 5b1bfebacac649e6f5051316e4075309caf93901 Mon Sep 17 00:00:00 2001
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From: Barak Sason Rofman <bsasonro@redhat.com>
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Date: Tue, 21 Apr 2020 19:13:41 +0300
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Subject: [PATCH 364/367] dht - fixing rebalance failures for files with holes
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Rebalance process handling of files which contains holes casued
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rebalance to fail with "No space left on device" errors.
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This patch modifies the code-flow in such a way that files with holes
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will be rebalanced correctly.
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backport of https://review.gluster.org/#/c/glusterfs/+/24357/
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>fixes: #1187
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>Change-Id: I89bc3d4ea7f074db7213d759c49307f379543932
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>Signed-off-by: Barak Sason Rofman <bsasonro@redhat.com>
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BUG: 1823703
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Change-Id: I89bc3d4ea7f074db7213d759c49307f379543932
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Signed-off-by: Barak Sason Rofman <bsasonro@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/198579
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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 | 21 ++++++++++-----------
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1 file changed, 10 insertions(+), 11 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 f4c62b8..7d9df02 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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@@ -650,7 +650,7 @@ out:
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static int
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__dht_rebalance_create_dst_file(xlator_t *this, xlator_t *to, xlator_t *from,
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loc_t *loc, struct iatt *stbuf, fd_t **dst_fd,
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- int *fop_errno)
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+ int *fop_errno, int file_has_holes)
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{
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int ret = -1;
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int ret2 = -1;
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@@ -819,7 +819,7 @@ __dht_rebalance_create_dst_file(xlator_t *this, xlator_t *to, xlator_t *from,
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/* No need to bother about 0 byte size files */
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if (stbuf->ia_size > 0) {
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- if (conf->use_fallocate) {
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+ if (conf->use_fallocate && !file_has_holes) {
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ret = syncop_fallocate(to, fd, 0, 0, stbuf->ia_size, NULL, NULL);
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if (ret < 0) {
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if (ret == -EOPNOTSUPP || ret == -EINVAL || ret == -ENOSYS) {
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@@ -846,9 +846,7 @@ __dht_rebalance_create_dst_file(xlator_t *this, xlator_t *to, xlator_t *from,
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goto out;
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}
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}
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- }
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-
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- if (!conf->use_fallocate) {
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+ } else {
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ret = syncop_ftruncate(to, fd, stbuf->ia_size, NULL, NULL, NULL,
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NULL);
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if (ret < 0) {
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@@ -1728,9 +1726,13 @@ dht_migrate_file(xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to,
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goto out;
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}
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+ /* Try to preserve 'holes' while migrating data */
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+ if (stbuf.ia_size > (stbuf.ia_blocks * GF_DISK_SECTOR_SIZE))
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+ file_has_holes = 1;
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+
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/* create the destination, with required modes/xattr */
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ret = __dht_rebalance_create_dst_file(this, to, from, loc, &stbuf, &dst_fd,
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- fop_errno);
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+ fop_errno, file_has_holes);
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if (ret) {
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gf_msg(this->name, GF_LOG_ERROR, 0, 0,
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"Create dst failed"
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@@ -1774,8 +1776,8 @@ dht_migrate_file(xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to,
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* destination. We need to do update this only post migration
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* as in case of failure the linkto needs to point to the source
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* subvol */
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- ret = __dht_rebalance_create_dst_file(this, to, from, loc, &stbuf,
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- &dst_fd, fop_errno);
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+ ret = __dht_rebalance_create_dst_file(
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+ this, to, from, loc, &stbuf, &dst_fd, fop_errno, file_has_holes);
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if (ret) {
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gf_log(this->name, GF_LOG_ERROR,
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"Create dst failed"
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@@ -1862,9 +1864,6 @@ dht_migrate_file(xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to,
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ret = 0;
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goto out;
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}
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- /* Try to preserve 'holes' while migrating data */
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- if (stbuf.ia_size > (stbuf.ia_blocks * GF_DISK_SECTOR_SIZE))
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- file_has_holes = 1;
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ret = __dht_rebalance_migrate_data(this, defrag, from, to, src_fd, dst_fd,
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stbuf.ia_size, file_has_holes,
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--
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1.8.3.1
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