motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-01 06:43:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

nbd: add support for NBD_CMD_TRIM

Browse source 
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-10-21 13:17:14 +02:00
parent 1486d04a1b
commit 7a706633e9
2 changed files with 38 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

25
block/nbd.c
View file

@ -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",
};