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authorBrian Foster <bfoster@redhat.com>2013-01-10 10:49:17 -0500
committerAnand Avati <avati@redhat.com>2013-01-18 09:32:21 -0800
commit679cb2399fc1f8e97f2b29654ec422f267b03783 (patch)
treeadb9bb89d6c512ad57d8f0c07f2ad18426512d52 /tests
parent9036bd1a7bab68351c38d65cd6a1c8af150467bb (diff)
afr: conditionally prioritize EIO errors over ENOENT
The most important errno logic historically only prioritized ESTALE over ENOENT. Commit c8c0942d added EIO prioritization over ENOENT to ensure that split-brain was reported when it occurs in conjunction with bricks missing the file entry. The unintended side effect of this change is that (non split-brain) EIO errors reported from the bricks themselves are now reported to the client when the expectation is that afr should squash said errors in favor of marking the file inconsistent. The high-level problem is that EIO is overloaded with different meanings from different contexts. This commit adds an eio parameter to the errno priority logic to conditionally flag when EIO is of higher priority and should be propagated to the client. BUG: 892730 Change-Id: Ib692a8a1f1737ef190d57894f392ec53ffb33aab Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-on: http://review.gluster.org/4376 Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'tests')
-rwxr-xr-xtests/bugs/bug-892730.t76
1 files changed, 76 insertions, 0 deletions
diff --git a/tests/bugs/bug-892730.t b/tests/bugs/bug-892730.t
new file mode 100755
index 0000000..0a67706
--- /dev/null
+++ b/tests/bugs/bug-892730.t
@@ -0,0 +1,76 @@
+#!/bin/bash
+#
+# Bug 892730 - Verify that afr handles EIO errors from the brick properly.
+#
+# The associated bug describes a problem where EIO errors returned from the
+# local filesystem of a brick that is part of a replica volume are exposed to
+# the user. This test simulates such failures and verifies that the volume
+# operates as expected.
+#
+########
+
+. $(dirname $0)/../include.rc
+
+cleanup;
+
+TEST mkdir -p $B0/test{1,2}
+
+# The graph is a two brick replica with error-gen enabled on the second brick
+# and configured to return EIO lookup errors 100% of the time. This simulates
+# a brick with a crashed or shut down local filesystem. Note that the order in
+# which errors occur is a factor in reproducing the original bug (error-gen
+# must be enabled in the second brick for this test to be effective).
+
+cat > $B0/test.vol <<EOF
+volume test-posix-0
+ type storage/posix
+ option directory $B0/test1
+end-volume
+
+volume test-locks-0
+ type features/locks
+ subvolumes test-posix-0
+end-volume
+
+volume test-posix-1
+ type storage/posix
+ option directory $B0/test2
+end-volume
+
+volume test-error-1
+ type debug/error-gen
+ option failure 100
+ option enable lookup
+ option error-no EIO
+ subvolumes test-posix-1
+end-volume
+
+volume test-locks-1
+ type features/locks
+ subvolumes test-error-1
+end-volume
+
+volume test-replicate-0
+ type cluster/replicate
+ option background-self-heal-count 0
+ subvolumes test-locks-0 test-locks-1
+end-volume
+EOF
+
+TEST glusterd
+
+TEST glusterfs --volfile=$B0/test.vol --attribute-timeout=0 --entry-timeout=0 $M0
+
+# We should be able to create and remove a file without interference from the
+# "broken" brick.
+
+TEST touch $M0/file
+TEST rm $M0/file
+
+TEST umount $M0
+
+rm -f $B0/test.vol
+rm -rf $B0/test1 $B0/test2
+
+cleanup;
+