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authorBharata B Rao <bharata@linux.vnet.ibm.com>2013-07-16 21:47:42 +0530
committerStefan Hajnoczi <stefanha@redhat.com>2013-07-19 12:29:21 +0800
commit0c14fb47ece5ef42d7a0a4b3e8e43e022b375720 (patch)
treec7460a55da9832b8b1d1cbebd7d8533c166129d7 /block
parente01bee0881e0f0c8a79555f6729d7238841a5b04 (diff)
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gluster: Add discard support for GlusterFS block driver.
Implement bdrv_aio_discard for gluster. Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/gluster.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/block/gluster.c b/block/gluster.c
index 61424bc..6de418c 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -532,6 +532,39 @@ out:
return NULL;
}
+#ifdef CONFIG_GLUSTERFS_DISCARD
+static BlockDriverAIOCB *qemu_gluster_aio_discard(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, BlockDriverCompletionFunc *cb,
+ void *opaque)
+{
+ int ret;
+ GlusterAIOCB *acb;
+ BDRVGlusterState *s = bs->opaque;
+ size_t size;
+ off_t offset;
+
+ offset = sector_num * BDRV_SECTOR_SIZE;
+ size = nb_sectors * BDRV_SECTOR_SIZE;
+
+ acb = qemu_aio_get(&gluster_aiocb_info, bs, cb, opaque);
+ acb->size = 0;
+ acb->ret = 0;
+ acb->finished = NULL;
+ s->qemu_aio_count++;
+
+ ret = glfs_discard_async(s->fd, offset, size, &gluster_finish_aiocb, acb);
+ if (ret < 0) {
+ goto out;
+ }
+ return &acb->common;
+
+out:
+ s->qemu_aio_count--;
+ qemu_aio_release(acb);
+ return NULL;
+}
+#endif
+
static int64_t qemu_gluster_getlength(BlockDriverState *bs)
{
BDRVGlusterState *s = bs->opaque;
@@ -602,6 +635,9 @@ static BlockDriver bdrv_gluster = {
.bdrv_aio_writev = qemu_gluster_aio_writev,
.bdrv_aio_flush = qemu_gluster_aio_flush,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
+#ifdef CONFIG_GLUSTERFS_DISCARD
+ .bdrv_aio_discard = qemu_gluster_aio_discard,
+#endif
.create_options = qemu_gluster_create_options,
};
@@ -618,6 +654,9 @@ static BlockDriver bdrv_gluster_tcp = {
.bdrv_aio_writev = qemu_gluster_aio_writev,
.bdrv_aio_flush = qemu_gluster_aio_flush,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
+#ifdef CONFIG_GLUSTERFS_DISCARD
+ .bdrv_aio_discard = qemu_gluster_aio_discard,
+#endif
.create_options = qemu_gluster_create_options,
};
@@ -634,6 +673,9 @@ static BlockDriver bdrv_gluster_unix = {
.bdrv_aio_writev = qemu_gluster_aio_writev,
.bdrv_aio_flush = qemu_gluster_aio_flush,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
+#ifdef CONFIG_GLUSTERFS_DISCARD
+ .bdrv_aio_discard = qemu_gluster_aio_discard,
+#endif
.create_options = qemu_gluster_create_options,
};
@@ -650,6 +692,9 @@ static BlockDriver bdrv_gluster_rdma = {
.bdrv_aio_writev = qemu_gluster_aio_writev,
.bdrv_aio_flush = qemu_gluster_aio_flush,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
+#ifdef CONFIG_GLUSTERFS_DISCARD
+ .bdrv_aio_discard = qemu_gluster_aio_discard,
+#endif
.create_options = qemu_gluster_create_options,
};