diff options
| author | Roman Kagan <rkagan@parallels.com> | 2015-04-28 10:46:38 +0300 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-05-22 09:37:31 +0100 |
| commit | dd3bed16ff229496b30cc77224b0c0ae645c4dae (patch) | |
| tree | 096b9c6cc0d46d90507bd681675c2c0497e42ee7 | |
| parent | 9de9da17d8304576e8402697bcee72c88ce499b8 (diff) | |
block/parallels: add get_block_status
Implement VFS method for get_block_status to Parallels format driver.
qemu_co_mutex_lock is not necessary yet (the driver is read-only) but
will be necessary very soon when write will be supported.
Signed-off-by: Roman Kagan <rkagan@parallels.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Message-id: 1430207220-24458-6-git-send-email-den@openvz.org
CC: Kevin Wolf <kwolf@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | block/parallels.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/block/parallels.c b/block/parallels.c index 8770c82351..b469984ef6 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -166,6 +166,26 @@ 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) { @@ -213,6 +233,7 @@ 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) |