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authorPoornima G <pgurusid@redhat.com>2017-05-26 15:45:57 +0530
committerAtin Mukherjee <amukherj@redhat.com>2017-06-13 05:01:17 +0000
commit7674584fa53944a4e982e217798f31a3d1ef313b (patch)
treee3729576373927b49409bcd6520f78aa579d46d5 /tests/basic/nl-cache.t
parent05b2fbd077cadc409994762e346ef94f4904545b (diff)
nl-cache: Fix a possible crash and stale cache
Issue1: Consider the followinf sequence of operations: ... nlc_ctx = nlc_ctx_get (inode i1) ....... -> nlc_clear_cache (i1) gets called as a part of nlc_invalidate or any other callers ... GF_FREE (ii nlc_ctx) LOCK (nlc_ctx->lock); -> This will result in crash as the ctx got freed in nlc_clear_cache. Issue2: lookup on dir1/file1 result in ENOENT add cache to dir1 at time T1 .... CHILD_DOWN at T2 lookup on dir1/file2 result in ENOENT add cache to dir1, but the cache time is still T1 lookup on dir1/file2 - should have been served from cache but the cache time is T1 < T2, hence cache is considered as invalid. So, after CHILD_DOWN the right thing would be to clear the cache and restart caching on that inode. Solution: Do not free nlc_ctx in nlc_clear_cache, but only in inode_forget() The fix for both issue1 and 2 is interleaved hence sending it as single patch. Change-Id: I83d8ed36c049a93567c6d7e63d045dc14ccbb397 BUG: 1458539 Signed-off-by: Poornima G <pgurusid@redhat.com> Reviewed-on: https://review.gluster.org/17453 Smoke: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Diffstat (limited to 'tests/basic/nl-cache.t')
-rwxr-xr-xtests/basic/nl-cache.t1
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/basic/nl-cache.t b/tests/basic/nl-cache.t
index f61532879b2..2979a9be0d4 100755
--- a/tests/basic/nl-cache.t
+++ b/tests/basic/nl-cache.t
@@ -16,6 +16,7 @@ EXPECT 'on' volinfo_field $V0 'performance.nl-cache'
EXPECT '600' volinfo_field $V0 'features.cache-invalidation-timeout'
EXPECT 'on' volinfo_field $V0 'features.cache-invalidation'
EXPECT '50000' volinfo_field $V0 'network.inode-lru-limit'
+TEST $CLI volume set $V0 nl-cache-positive-entry on
TEST $CLI volume start $V0;
EXPECT 'Started' volinfo_field $V0 'Status';