diff options
Diffstat (limited to 'block/nbd.c')
| -rw-r--r-- | block/nbd.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/block/nbd.c b/block/nbd.c index 097b4188e5..161b299855 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -435,6 +435,30 @@ static int nbd_co_flush(BlockDriverState *bs) return -reply.error; } +static int nbd_co_discard(BlockDriverState *bs, int64_t sector_num, + int nb_sectors) +{ + BDRVNBDState *s = bs->opaque; + struct nbd_request request; + struct nbd_reply reply; + + if (!(s->nbdflags & NBD_FLAG_SEND_TRIM)) { + return 0; + } + request.type = NBD_CMD_TRIM; + request.from = sector_num * 512;; + request.len = nb_sectors * 512; + + nbd_coroutine_start(s, &request); + if (nbd_co_send_request(s, &request, NULL, 0) == -1) { + reply.error = errno; + } else { + nbd_co_receive_reply(s, &request, &reply, NULL, 0); + } + nbd_coroutine_end(s, &request); + return -reply.error; +} + static void nbd_close(BlockDriverState *bs) { BDRVNBDState *s = bs->opaque; @@ -459,6 +483,7 @@ static BlockDriver bdrv_nbd = { .bdrv_co_writev = nbd_co_writev, .bdrv_close = nbd_close, .bdrv_co_flush_to_os = nbd_co_flush, + .bdrv_co_discard = nbd_co_discard, .bdrv_getlength = nbd_getlength, .protocol_name = "nbd", }; |