ec: Fix failures with missing files

When a file does not exist on a brick but it does on others, there
could be problems trying to access it because there was some loc_t
structures with null 'pargfid' but 'name' was set. This forced
inode resolution based on <pargfid>/name instead of <gfid> which
would be the correct one. To solve this problem, 'name' is always
set to NULL when 'pargfid' is not present.

Another problem was caused by an incorrect management of errors
while doing incremental locking. The only allowed error during an
incremental locking was ENOTCONN, but missing files on a brick can
be returned as ESTALE. This caused an EIO on the operation.

This patch doesn't care of errors during an incremental locking. At
the end of the operation it will check if there are enough successfully
locked bricks to continue or not.

This is a backport of http://review.gluster.org/9407/

Change-Id: I9360ebf8d819d219cea2d173c09bd37679a6f15a
BUG: 1183716
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/9560
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/bugs/bug-1176062.t b/tests/bugs/bug-1176062.t
new file mode 100755
index 00000000000..4a9d0d95e76
--- /dev/null
+++ b/tests/bugs/bug-1176062.t
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+
+cleanup
+
+trap "jobs -p | xargs -r kill -9" EXIT INT QUIT
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 disperse 3 redundancy 1 $H0:$B0/${V0}{0..2}
+TEST $CLI volume set $V0 diagnostics.client-log-level TRACE
+EXPECT 'Created' volinfo_field $V0 'Status'
+TEST $CLI volume start $V0
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT 'Started' volinfo_field $V0 'Status'
+TEST glusterfs --attribute-timeout=0 --entry-timeout=0 --volfile-id=/$V0 --volfile-server=$H0 $M0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "3" ec_child_up_count $V0 0
+
+TEST mkdir -p $M0/a/b/c
+dd if=/dev/zero of=$M0/a/b/c/test bs=1024k &
+
+sleep 1
+
+TEST gluster volume replace-brick $V0 $H0:$B0/${V0}0 $H0:$B0/${V0}3 commit force
+
+sleep 10
+
+TEST kill -TERM %1
+wait %1
+# Verify that the 'dd' process was terminated by the 'kill -TERM' and not by
+# any other error.
+TEST [ $? -eq 143 ]
+
+cleanup