features/shard: Implement zerofill FOP

        Backport of: http://review.gluster.org/13234

Change-Id: I5ef61285dbe3ff218e50b8a272c88227c30c35c6
BUG: 1299712
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/13287
Smoke: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>

2 files changed, 109 insertions, 0 deletions

diff --git a/tests/bugs/shard/bug-shard-zerofill.c b/tests/bugs/shard/bug-shard-zerofill.c
new file mode 100644
index 00000000000..2ec411921cf
--- /dev/null
+++ b/tests/bugs/shard/bug-shard-zerofill.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include "glfs.h"
+#include "glfs-handles.h"
+
+int
+main (int argc, char *argv[])
+{
+        glfs_t    *fs = NULL;
+        glfs_fd_t *fd = NULL;
+        int        ret = 1;
+
+        if (argc != 4) {
+                fprintf (stderr, "Syntax: %s <host> <volname> <file-path> \n", argv[0]);
+                return 1;
+        }
+
+        fs = glfs_new (argv[2]);
+        if (!fs) {
+                fprintf (stderr, "glfs_new: returned NULL\n");
+                return 1;
+        }
+
+        ret = glfs_set_volfile_server (fs, "tcp", argv[1], 24007);
+        if (ret != 0) {
+                fprintf (stderr, "glfs_set_volfile_server: retuned %d\n", ret);
+                goto out;
+        }
+        ret = glfs_set_logging (fs, "/var/log/glusterfs/glfs-dis.log", 7);
+        if (ret != 0) {
+                fprintf (stderr, "glfs_set_logging: returned %d\n", ret);
+                goto out;
+        }
+        ret = glfs_init (fs);
+        if (ret != 0) {
+                fprintf (stderr, "glfs_init: returned %d\n", ret);
+                goto out;
+        }
+
+        fd = glfs_open (fs, argv[3], O_RDWR);
+        if (fd == NULL) {
+                fprintf (stderr, "glfs_open: returned NULL\n");
+                goto out;
+        }
+
+        /* Zero-fill "foo" with 10MB of data */
+        ret = glfs_zerofill (fd, 0, 10485760);
+        if (ret <= 0) {
+                fprintf (stderr, "glfs_zerofill: returned %d\n", ret);
+                goto out;
+        }
+
+        glfs_close(fd);
+
+        ret = 0;
+
+out:
+        glfs_fini (fs);
+        return ret;
+}
diff --git a/tests/bugs/shard/bug-shard-zerofill.t b/tests/bugs/shard/bug-shard-zerofill.t
new file mode 100644
index 00000000000..d5113001b69
--- /dev/null
+++ b/tests/bugs/shard/bug-shard-zerofill.t
@@ -0,0 +1,50 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+function file_all_zeroes {
+        < $1 tr -d '\0' | read -n 1 || echo 1
+}
+
+cleanup
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 2 $H0:$B0/${V0}{0..3}
+TEST $CLI volume set $V0 features.shard on
+TEST $CLI volume start $V0
+
+TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0
+
+# Create a file.
+TEST touch $M0/foo
+
+gfid_foo=`getfattr -n glusterfs.gfid.string $M0/foo 2>/dev/null \
+          | grep glusterfs.gfid.string | cut -d '"' -f 2`
+
+TEST gcc -Wall -O2 -I api/src -o $(dirname $0)/bug-shard-zerofill $(dirname $0)/bug-shard-zerofill.c -lgfapi
+TEST $(dirname $0)/bug-shard-zerofill $H0 $V0 /foo
+
+# This should ensure /.shard is created on the bricks.
+TEST stat $B0/${V0}0/.shard
+TEST stat $B0/${V0}1/.shard
+TEST stat $B0/${V0}2/.shard
+TEST stat $B0/${V0}3/.shard
+
+EXPECT "4194304" echo `find $B0 -name $gfid_foo.1 | xargs stat -c %s`
+EXPECT "2097152" echo `find $B0 -name $gfid_foo.2 | xargs stat -c %s`
+
+EXPECT "1" file_all_zeroes $M0/foo
+
+TEST `echo "abc" >> $M0/foo`
+
+EXPECT_NOT "1" file_all_zeroes $M0/foo
+
+TEST umount $M0
+TEST $CLI volume stop $V0
+TEST $CLI volume delete $V0
+
+TEST rm -f $(dirname $0)/bug-shard-zerofill
+
+cleanup