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block: Convert bdrv_pwrite_zeroes() to BdrvChild

Browse source 
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2016-06-16 15:13:15 +02:00
parent d9ca2ea2e2
commit 720ff280e7
8 changed files with 18 additions and 11 deletions
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5
block/block-backend.c
View file

@ -870,6 +870,11 @@ int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
flags | BDRV_REQ_ZERO_WRITE);
}
int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags)
{
return bdrv_make_zero(blk->root, flags);
}
static void error_callback_bh(void *opaque)
{
struct BlockBackendAIOCB *acb = opaque;

9
block/io.c
View file

@ -649,7 +649,7 @@ int bdrv_write(BdrvChild *child, int64_t sector_num,
true, 0);
}
int bdrv_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
int count, BdrvRequestFlags flags)
{
QEMUIOVector qiov;
@ -659,7 +659,7 @@ int bdrv_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
};
qemu_iovec_init_external(&qiov, &iov, 1);
return bdrv_prwv_co(bs, offset, &qiov, true,
return bdrv_prwv_co(child->bs, offset, &qiov, true,
BDRV_REQ_ZERO_WRITE | flags);
}
@ -672,9 +672,10 @@ int bdrv_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
*
* Returns < 0 on error, 0 on success. For error codes see bdrv_write().
*/
int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags)
int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags)
{
int64_t target_sectors, ret, nb_sectors, sector_num = 0;
BlockDriverState *bs = child->bs;
BlockDriverState *file;
int n;
@ -698,7 +699,7 @@ int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags)
sector_num += n;
continue;
}
ret = bdrv_pwrite_zeroes(bs, sector_num << BDRV_SECTOR_BITS,
ret = bdrv_pwrite_zeroes(child, sector_num << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, flags);
if (ret < 0) {
error_report("error writing zeroes at sector %" PRId64 ": %s",

2
block/parallels.c
View file

@ -210,7 +210,7 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
int ret;
space += s->prealloc_size;
if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) {
ret = bdrv_pwrite_zeroes(bs->file->bs,
ret = bdrv_pwrite_zeroes(bs->file,
s->data_end << BDRV_SECTOR_BITS,
space << BDRV_SECTOR_BITS, 0);
} else {

2
block/qcow2-cluster.c
View file

@ -1752,7 +1752,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
goto fail;
}
ret = bdrv_pwrite_zeroes(bs->file->bs, offset, s->cluster_size, 0);
ret = bdrv_pwrite_zeroes(bs->file, offset, s->cluster_size, 0);
if (ret < 0) {
if (!preallocated) {
qcow2_free_clusters(bs, offset, s->cluster_size,

4
block/qcow2.c
View file

@ -2709,7 +2709,7 @@ static int make_completely_empty(BlockDriverState *bs)
/* After this call, neither the in-memory nor the on-disk refcount
* information accurately describe the actual references */
ret = bdrv_pwrite_zeroes(bs->file->bs, s->l1_table_offset,
ret = bdrv_pwrite_zeroes(bs->file, s->l1_table_offset,
l1_clusters * s->cluster_size, 0);
if (ret < 0) {
goto fail_broken_refcounts;
@ -2723,7 +2723,7 @@ static int make_completely_empty(BlockDriverState *bs)
* overwrite parts of the existing refcount and L1 table, which is not
* an issue because the dirty flag is set, complete data loss is in fact
* desired and partial data loss is consequently fine as well */
ret = bdrv_pwrite_zeroes(bs->file->bs, s->cluster_size,
ret = bdrv_pwrite_zeroes(bs->file, s->cluster_size,
(2 + l1_clusters) * s->cluster_size, 0);
/* This call (even if it failed overall) may have overwritten on-disk
* refcount structures; in that case, the in-memory refcount information

4
include/block/block.h
View file

@ -230,9 +230,9 @@ int bdrv_read(BdrvChild *child, int64_t sector_num,
uint8_t *buf, int nb_sectors);
int bdrv_write(BdrvChild *child, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int bdrv_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
int count, BdrvRequestFlags flags);
int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags);
int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags);
int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int bytes);
int bdrv_preadv(BdrvChild *child, int64_t offset, QEMUIOVector *qiov);
int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf, int bytes);

1
include/sysemu/block-backend.h
View file

@ -124,6 +124,7 @@ int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags);
int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count,
BdrvRequestFlags flags);

2
qemu-img.c
View file

@ -1648,7 +1648,7 @@ static int convert_do_copy(ImgConvertState *s)
if (!s->has_zero_init && !s->target_has_backing &&
bdrv_can_write_zeroes_with_unmap(blk_bs(s->target)))
{
ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP);
ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP);
if (ret == 0) {
s->has_zero_init = true;
}