features/shard: Fix size update for writes at hole region

        Backport of: http://review.gluster.org/#/c/12020

Change-Id: I4b6e9101ccb881d3d285704902484e1e89ccaceb
BUG: 1257204
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/12026
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/bugs/shard/bug-1256580.t b/tests/bugs/shard/bug-1256580.t
new file mode 100644
index 00000000000..c1704e2022a
--- /dev/null
+++ b/tests/bugs/shard/bug-1256580.t
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+
+cleanup
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 $H0:$B0/${V0}{0,1}
+TEST $CLI volume set $V0 features.shard on
+TEST $CLI volume set $V0 performance.strict-write-ordering on
+TEST $CLI volume start $V0
+
+TEST glusterfs --volfile-id=$V0 --volfile-server=$H0 $M0
+
+TEST mkdir $M0/dir
+TEST touch $M0/dir/file
+
+# Create "file" with holes.
+TEST truncate -s 6M $M0/dir/file
+EXPECT '6291456' stat -c %s $M0/dir/file
+
+# Perform writes that do not cross the 6M boundary
+TEST dd if=/dev/zero of=$M0/dir/file bs=1024 seek=3072 count=2048 conv=notrunc
+
+# Ensure that the file size is 6M (as opposed to 8M that would appear in the
+# presence of this bug).
+EXPECT '6291456' stat -c %s $M0/dir/file
+
+#Extend the write beyond EOF such that it again creates a hole of 1M size
+TEST dd if=/dev/zero of=$M0/dir/file bs=1024 seek=7168 count=2048 conv=notrunc
+
+# Ensure that the file size is not greater than 9M.
+EXPECT '9437184' stat -c %s $M0/dir/file
+
+cleanup