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block: use bdrv_is_sg() helper instead of raw bs->sg reading 

I believe that if the helper exists, it must be used always for reading
of the value. It breaks expectations in the other case.

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Hanna Reitz <hreitz@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Fam Zheng <fam@euphon.net>
CC: Ronnie Sahlberg <ronniesahlberg@gmail.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Peter Lieven <pl@kamp.de>
CC: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20220817083736.40981-2-den@openvz.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Denis V. Lunev 2022-08-17 10:37:35 +02:00 committed by Kevin Wolf
parent 62a6c300f1
commit 006e196244
3 changed files with 4 additions and 4 deletions
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2
block/file-posix.c
View File

@ -1295,7 +1295,7 @@ static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
}
#endif
if (bs->sg || S_ISBLK(st.st_mode)) {
if (bdrv_is_sg(bs) || S_ISBLK(st.st_mode)) {
int ret = hdev_get_max_hw_transfer(s->fd, &st);
if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) {

2
block/iscsi.c
View File

@ -2065,7 +2065,7 @@ static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
uint64_t max_xfer_len = iscsilun->use_16_for_rw ? 0xffffffff : 0xffff;
unsigned int block_size = MAX(BDRV_SECTOR_SIZE, iscsilun->block_size);
assert(iscsilun->block_size >= BDRV_SECTOR_SIZE || bs->sg);
assert(iscsilun->block_size >= BDRV_SECTOR_SIZE || bdrv_is_sg(bs));
bs->bl.request_alignment = block_size;

4
block/raw-format.c
View File

@ -463,7 +463,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
return -EINVAL;
}
bs->sg = bs->file->bs->sg;
bs->sg = bdrv_is_sg(bs->file->bs);
bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
(BDRV_REQ_FUA & bs->file->bs->supported_write_flags);
bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
@ -489,7 +489,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
return ret;
}
if (bs->sg && (s->offset || s->has_size)) {
if (bdrv_is_sg(bs) && (s->offset || s->has_size)) {
error_setg(errp, "Cannot use offset/size with SCSI generic devices");
return -EINVAL;
}