From: Roman Kagan <rka...@parallels.com>
Implement VFS method for get_block_status to Parallels format driver.
Signed-off-by: Roman Kagan <rka...@parallels.com>
Signed-off-by: Denis V. Lunev <d...@openvz.org>
CC: Jeff Cody <jc...@redhat.com>
CC: Kevin Wolf <kw...@redhat.com>
CC: Stefan Hajnoczi <stefa...@redhat.com>
---
block/parallels.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/block/parallels.c b/block/parallels.c
index a05bf39..2d3e962 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -384,6 +384,26 @@ static int cluster_remainder(BDRVParallelsState *s,
int64_t sector_num,
return MIN(nb_sectors, ret);
}
+static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, int *pnum)
+{
+ BDRVParallelsState *s = bs->opaque;
+ int64_t offset;
+
+ qemu_co_mutex_lock(&s->lock);
+ offset = seek_to_sector(s, sector_num);
+ qemu_co_mutex_unlock(&s->lock);
+
+ *pnum = cluster_remainder(s, sector_num, nb_sectors);
+
+ if (offset < 0) {
+ return 0;
+ }
+
+ return (offset << BDRV_SECTOR_BITS) |
+ BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
+}
+
static int parallels_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
@@ -433,6 +453,7 @@ static BlockDriver bdrv_parallels = {
.bdrv_open = parallels_open,
.bdrv_read = parallels_co_read,
.bdrv_close = parallels_close,
+ .bdrv_co_get_block_status = parallels_co_get_block_status,
};
static void bdrv_parallels_init(void)
--
1.9.1
