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block: switch blk_write_compressed() to byte-based interface 

This is a preparatory patch, which continues the general trend of the
transition to the byte-based interfaces. bdrv_check_request() and
blk_check_request() are no longer used, thus we can remove them.

Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Jeff Cody <jcody@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
CC: Eric Blake <eblake@redhat.com>
CC: John Snow <jsnow@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Pavel Butsykin 2016-07-22 11:17:40 +03:00 committed by Kevin Wolf
parent 094138d09e
commit fe5c1355e7
6 changed files with 20 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
block/block-backend.c
View File

@ -743,21 +743,6 @@ static int blk_check_byte_request(BlockBackend *blk, int64_t offset,
return 0;
}
static int blk_check_request(BlockBackend *blk, int64_t sector_num,
int nb_sectors)
{
if (sector_num < 0 || sector_num > INT64_MAX / BDRV_SECTOR_SIZE) {
return -EIO;
}
if (nb_sectors < 0 || nb_sectors > INT_MAX / BDRV_SECTOR_SIZE) {
return -EIO;
}
return blk_check_byte_request(blk, sector_num * BDRV_SECTOR_SIZE,
nb_sectors * BDRV_SECTOR_SIZE);
}
int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
@ -1500,15 +1485,15 @@ int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
flags | BDRV_REQ_ZERO_WRITE);
}
int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
int count)
{
int ret = blk_check_request(blk, sector_num, nb_sectors);
int ret = blk_check_byte_request(blk, offset, count);
if (ret < 0) {
return ret;
}
return bdrv_write_compressed(blk_bs(blk), sector_num, buf, nb_sectors);
return bdrv_pwrite_compressed(blk_bs(blk), offset, buf, count);
}
int blk_truncate(BlockBackend *blk, int64_t offset)

22
block/io.c
View File

@ -540,17 +540,6 @@ static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset,
return 0;
}
static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
if (nb_sectors < 0 || nb_sectors > BDRV_REQUEST_MAX_SECTORS) {
return -EIO;
}
return bdrv_check_byte_request(bs, sector_num * BDRV_SECTOR_SIZE,
nb_sectors * BDRV_SECTOR_SIZE);
}
typedef struct RwCo {
BdrvChild *child;
int64_t offset;
@ -1879,8 +1868,8 @@ int bdrv_is_allocated_above(BlockDriverState *top,
return 0;
}
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
int bdrv_pwrite_compressed(BlockDriverState *bs, int64_t offset,
const void *buf, int bytes)
{
BlockDriver *drv = bs->drv;
int ret;
@ -1891,14 +1880,17 @@ int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
if (!drv->bdrv_write_compressed) {
return -ENOTSUP;
}
ret = bdrv_check_request(bs, sector_num, nb_sectors);
ret = bdrv_check_byte_request(bs, offset, bytes);
if (ret < 0) {
return ret;
}
assert(QLIST_EMPTY(&bs->dirty_bitmaps));
assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
return drv->bdrv_write_compressed(bs, offset >> BDRV_SECTOR_BITS, buf,
bytes >> BDRV_SECTOR_BITS);
}
typedef struct BdrvVmstateCo {

4
include/block/block.h
View File

@ -399,8 +399,8 @@ const char *bdrv_get_node_name(const BlockDriverState *bs);
const char *bdrv_get_device_name(const BlockDriverState *bs);
const char *bdrv_get_device_or_node_name(const BlockDriverState *bs);
int bdrv_get_flags(BlockDriverState *bs);
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int bdrv_pwrite_compressed(BlockDriverState *bs, int64_t offset,
const void *buf, int bytes);
int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs);
void bdrv_round_sectors_to_clusters(BlockDriverState *bs,

4
include/sysemu/block-backend.h
View File

@ -204,8 +204,8 @@ void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque);
int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
int count);
int blk_truncate(BlockBackend *blk, int64_t offset);
int blk_pdiscard(BlockBackend *blk, int64_t offset, int count);
int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,

6
qemu-img.c
View File

@ -1590,7 +1590,9 @@ static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
break;
}
ret = blk_write_compressed(s->target, sector_num, buf, n);
ret = blk_pwrite_compressed(s->target,
sector_num << BDRV_SECTOR_BITS,
buf, n << BDRV_SECTOR_BITS);
if (ret < 0) {
return ret;
}
@ -1727,7 +1729,7 @@ static int convert_do_copy(ImgConvertState *s)
if (s->compressed) {
/* signal EOF to align */
ret = blk_write_compressed(s->target, 0, NULL, 0);
ret = blk_pwrite_compressed(s->target, 0, NULL, 0);
if (ret < 0) {
goto fail;
}

2
qemu-io-cmds.c
View File

@ -504,7 +504,7 @@ static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
return -ERANGE;
}
ret = blk_write_compressed(blk, offset >> 9, (uint8_t *)buf, count >> 9);
ret = blk_pwrite_compressed(blk, offset, buf, count);
if (ret < 0) {
return ret;
}