Reviewed-by: Niels de Vos <nde...@redhat.com>
Signed-off-by: Fam Zheng <f...@redhat.com>
---
block/gluster.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/block/gluster.c b/block/gluster.c
index a8aaacf..517b4c3 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -723,6 +723,33 @@ static int64_t
qemu_gluster_allocated_file_size(BlockDriverState *bs)
}
}
+
+static int qemu_gluster_lockf(BlockDriverState *bs, BdrvLockfCmd cmd)
+{
+ BDRVGlusterState *s = bs->opaque;
+ int ret;
+ struct flock fl = (struct flock) {
+ .l_start = 0,
+ .l_whence = SEEK_SET,
+ .l_len = 0,
+ };
+ switch (cmd) {
+ case BDRV_LOCKF_EXCLUSIVE:
+ fl.l_type = F_WRLCK;
+ break;
+ case BDRV_LOCKF_SHARED:
+ fl.l_type = F_RDLCK;
+ break;
+ case BDRV_LOCKF_UNLOCK:
+ fl.l_type = F_UNLCK;
+ break;
+ default:
+ abort();
+ }
+ ret = glfs_posix_lock(s->fd, F_SETLK, &fl);
+ return ret == -1 ? -errno : 0;
+}
+
static int qemu_gluster_has_zero_init(BlockDriverState *bs)
{
/* GlusterFS volume could be backed by a block device */
@@ -764,6 +791,7 @@ static BlockDriver bdrv_gluster = {
.bdrv_co_readv = qemu_gluster_co_readv,
.bdrv_co_writev = qemu_gluster_co_writev,
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
+ .bdrv_lockf = qemu_gluster_lockf,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
.bdrv_co_discard = qemu_gluster_co_discard,
@@ -791,6 +819,7 @@ static BlockDriver bdrv_gluster_tcp = {
.bdrv_co_readv = qemu_gluster_co_readv,
.bdrv_co_writev = qemu_gluster_co_writev,
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
+ .bdrv_lockf = qemu_gluster_lockf,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
.bdrv_co_discard = qemu_gluster_co_discard,
@@ -818,6 +847,7 @@ static BlockDriver bdrv_gluster_unix = {
.bdrv_co_readv = qemu_gluster_co_readv,
.bdrv_co_writev = qemu_gluster_co_writev,
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
+ .bdrv_lockf = qemu_gluster_lockf,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
.bdrv_co_discard = qemu_gluster_co_discard,
@@ -845,6 +875,7 @@ static BlockDriver bdrv_gluster_rdma = {
.bdrv_co_readv = qemu_gluster_co_readv,
.bdrv_co_writev = qemu_gluster_co_writev,
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
+ .bdrv_lockf = qemu_gluster_lockf,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
.bdrv_co_discard = qemu_gluster_co_discard,
--
2.8.2
