diff options
| author | Susant Palai <spalai@redhat.com> | 2017-07-26 17:12:03 +0530 |
|---|---|---|
| committer | Raghavendra G <rgowdapp@redhat.com> | 2017-08-01 06:10:14 +0000 |
| commit | c7cc5049fc8965836926a6f1b3a3270ad1aa566d (patch) | |
| tree | 6a506b463078a2e8f352af07d42a72e270373abb /xlators/cluster/dht | |
| parent | 45c973576d6356dbe4da897e9f0528eac7529d48 (diff) | |
cluster/dht: rebalance min-free-disk fix
To calculate available space on a subvolume we used to do
the following in __dht_check_free_space.
post_availspace = (dst_statfs.f_bavail * dst_statfs.f_frsize) - stbuf->ia_size
Now to subtracting the file size from available space is tricky here.
Sometime available space will be lesser than the file size and since all the
participating members in calculation are unsigned int, the result is a large
number (integer overflow).
Solution: We do not need to subtract the file size from the space available,
since fallocate would have reserved file size space already.
Change-Id: I4f724358c44b9911933742ff3ff8d55b3dfda1cb
BUG: 1475282
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: https://review.gluster.org/17876
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Reviewed-by: N Balachandran <nbalacha@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Diffstat (limited to 'xlators/cluster/dht')
| -rw-r--r-- | xlators/cluster/dht/src/dht-rebalance.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c index ffc7fdff3f5..d6718c55489 100644 --- a/xlators/cluster/dht/src/dht-rebalance.c +++ b/xlators/cluster/dht/src/dht-rebalance.c @@ -881,8 +881,7 @@ __dht_check_free_space (xlator_t *this, xlator_t *to, xlator_t *from, loc_t *loc dht_layout_t *layout = NULL; uint64_t src_statfs_blocks = 1; uint64_t dst_statfs_blocks = 1; - double post_availspace = 0; - double post_percent = 0; + double post_availspacepercent = 0; int i = 0; xdata = dict_new (); @@ -975,9 +974,12 @@ __dht_check_free_space (xlator_t *this, xlator_t *to, xlator_t *from, loc_t *loc check_avail_space: if (conf->disk_unit == 'p' && dst_statfs.f_blocks) { - post_availspace = (dst_statfs.f_bavail * dst_statfs.f_frsize) - stbuf->ia_size; - post_percent = (post_availspace * 100) / (dst_statfs.f_blocks * dst_statfs.f_frsize); - if (post_percent < conf->min_free_disk) { + post_availspacepercent = (dst_statfs.f_bavail * 100) / dst_statfs.f_blocks; + gf_msg_debug (this->name, 0, "file : %s, post_availspacepercent : %lf " + "f_bavail : %lu min-free-disk: %lf", loc->path, + post_availspacepercent, dst_statfs.f_bavail, conf->min_free_disk); + + if (post_availspacepercent < conf->min_free_disk) { gf_msg (this->name, GF_LOG_WARNING, 0, 0, "Write will cross min-free-disk for " "file - %s on subvol - %s. Looking " @@ -991,7 +993,11 @@ check_avail_space: } if (conf->disk_unit != 'p' && - ((dst_statfs.f_bavail * dst_statfs.f_frsize) - stbuf->ia_size) < conf->min_free_disk) { + ((dst_statfs.f_bavail * dst_statfs.f_frsize) < conf->min_free_disk)) { + gf_msg_debug (this->name, 0, "file : %s, destination frsize: %lu " + "f_bavail : %lu min-free-disk: %lf", loc->path, + dst_statfs.f_frsize, dst_statfs.f_bavail, conf->min_free_disk); + gf_msg (this->name, GF_LOG_WARNING, 0, 0, "Write will cross " "min-free-disk for file - %s on subvol - %s. Looking " "for new subvol", loc->path, to->name); |