diff options
| author | Christoph Hellwig <hch@lst.de> | 2010-12-16 19:36:31 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-12-17 16:11:03 +0100 |
| commit | bb8bf76fb1c4afa116a7f11fee559b3cca671a4a (patch) | |
| tree | 3869081b39a96da24bff96e06099794960dd9ccf /block | |
| parent | 61d9d6b091aa04e5e5bd20951aa689a5bbe65aed (diff) | |
block: add discard support
Add a new bdrv_discard method to free blocks in a mapping image, and a new
drive property to set the granularity for these discard. If no discard
granularity support is set discard support is disabled.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/raw.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/raw.c b/block/raw.c index 1980debc00..b0f72d6a62 100644 --- a/block/raw.c +++ b/block/raw.c @@ -65,6 +65,11 @@ static int raw_probe(const uint8_t *buf, int buf_size, const char *filename) return 1; /* everything can be opened as raw image */ } +static int raw_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) +{ + return bdrv_discard(bs->file, sector_num, nb_sectors); +} + static int raw_is_inserted(BlockDriverState *bs) { return bdrv_is_inserted(bs->file); @@ -130,6 +135,7 @@ static BlockDriver bdrv_raw = { .bdrv_aio_readv = raw_aio_readv, .bdrv_aio_writev = raw_aio_writev, .bdrv_aio_flush = raw_aio_flush, + .bdrv_discard = raw_discard, .bdrv_is_inserted = raw_is_inserted, .bdrv_eject = raw_eject, |