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authorPranith Kumar K <pkarampu@redhat.com>2014-06-20 16:06:42 +0530
committerVijay Bellur <vbellur@redhat.com>2014-06-22 20:40:57 -0700
commitf022af610d85e7b7cc4f63bf0491a738b5a6f082 (patch)
tree35f18ffee8cb700f14d659e52f72a558674d0bb8 /xlators/debug/io-stats
parent0c85a8a125eccbd9cf0028116700d7025429656f (diff)
libglusterfs: Don't allow '-0' as input value for numbers
Problem: io-stats tries to init log-buf-size as uint32. All gf_string2u*** functions which get the unsigned values from string don't want the string to contain '-'. So the GF_OPTION_INIT with '-0' as value fails init in io-stats, but by that time 'ret' is already reset to 0. Io-stats ends up returning 0 even when init failed. Because of this caller of init thinks initialization is successful when it is not. iostat_xlator->private is still NULL. Because of this when a fop tries to access members of io-stat-private structure, it crashes. Fix: I initially thought may be we should fix all gf_string2u*** functions to accept '-0'. But all these functions are used only for setting volume options. If we accept '-0', gluster volume info shows output as follows: diagnostics.brick-log-buf-size: -0 This seemed ugly, so I felt it is better to disallow '-0' as valid input for numbers. Also fixed return value in cases of failures in io-stats. Change-Id: I67ac92853b6d2be70516ad1d07505ffd9f058aa4 BUG: 1111557 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/8129 Reviewed-by: Krutika Dhananjay <kdhananj@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Harshavardhana <harsha@harshavardhana.net> Tested-by: Harshavardhana <harsha@harshavardhana.net> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/debug/io-stats')
-rw-r--r--xlators/debug/io-stats/src/io-stats.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/xlators/debug/io-stats/src/io-stats.c b/xlators/debug/io-stats/src/io-stats.c
index 2a5eedefbd3..6a2aa586ab1 100644
--- a/xlators/debug/io-stats/src/io-stats.c
+++ b/xlators/debug/io-stats/src/io-stats.c
@@ -2838,6 +2838,9 @@ init (xlator_t *this)
this->private = conf;
ret = 0;
out:
+ if (!this->private)
+ ret = -1;
+
return ret;
}