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block/io: refactor save/load vmstate 

Like for read/write in a previous commit, drop extra indirection layer,
generate directly bdrv_readv_vmstate() and bdrv_writev_vmstate().

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200924185414.28642-8-vsementsov@virtuozzo.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2020-09-24 21:54:14 +03:00 committed by Stefan Hajnoczi
parent fae2681add
commit b33b354f3a
3 changed files with 45 additions and 43 deletions
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10
block/coroutines.h
View File

@ -57,11 +57,9 @@ bdrv_common_block_status_above(BlockDriverState *bs,
int64_t *map,
BlockDriverState **file);
int coroutine_fn
bdrv_co_rw_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos,
bool is_read);
int generated_co_wrapper
bdrv_rw_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos,
bool is_read);
int coroutine_fn bdrv_co_readv_vmstate(BlockDriverState *bs,
QEMUIOVector *qiov, int64_t pos);
int coroutine_fn bdrv_co_writev_vmstate(BlockDriverState *bs,
QEMUIOVector *qiov, int64_t pos);
#endif /* BLOCK_COROUTINES_INT_H */

72
block/io.c
View File

@ -2475,28 +2475,50 @@ int bdrv_is_allocated_above(BlockDriverState *top,
}
int coroutine_fn
bdrv_co_rw_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos,
bool is_read)
bdrv_co_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
BlockDriverState *child_bs = bdrv_primary_bs(bs);
int ret = -ENOTSUP;
if (!drv) {
return -ENOMEDIUM;
}
bdrv_inc_in_flight(bs);
if (!drv) {
ret = -ENOMEDIUM;
} else if (drv->bdrv_load_vmstate) {
if (is_read) {
ret = drv->bdrv_load_vmstate(bs, qiov, pos);
} else {
ret = drv->bdrv_save_vmstate(bs, qiov, pos);
}
if (drv->bdrv_load_vmstate) {
ret = drv->bdrv_load_vmstate(bs, qiov, pos);
} else if (child_bs) {
ret = bdrv_co_rw_vmstate(child_bs, qiov, pos, is_read);
ret = bdrv_co_readv_vmstate(child_bs, qiov, pos);
}
bdrv_dec_in_flight(bs);
return ret;
}
int coroutine_fn
bdrv_co_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
BlockDriverState *child_bs = bdrv_primary_bs(bs);
int ret = -ENOTSUP;
if (!drv) {
return -ENOMEDIUM;
}
bdrv_inc_in_flight(bs);
if (drv->bdrv_save_vmstate) {
ret = drv->bdrv_save_vmstate(bs, qiov, pos);
} else if (child_bs) {
ret = bdrv_co_writev_vmstate(child_bs, qiov, pos);
}
bdrv_dec_in_flight(bs);
return ret;
}
@ -2504,38 +2526,18 @@ int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
int64_t pos, int size)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, size);
int ret;
int ret = bdrv_writev_vmstate(bs, &qiov, pos);
ret = bdrv_writev_vmstate(bs, &qiov, pos);
if (ret < 0) {
return ret;
}
return size;
}
int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
return bdrv_rw_vmstate(bs, qiov, pos, false);
return ret < 0 ? ret : size;
}
int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
int64_t pos, int size)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, size);
int ret;
int ret = bdrv_readv_vmstate(bs, &qiov, pos);
ret = bdrv_readv_vmstate(bs, &qiov, pos);
if (ret < 0) {
return ret;
}
return size;
}
int bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
return bdrv_rw_vmstate(bs, qiov, pos, true);
return ret < 0 ? ret : size;
}
/**************************************************************/

6
include/block/block.h
View File

@ -572,8 +572,10 @@ int path_has_protocol(const char *path);
int path_is_absolute(const char *path);
char *path_combine(const char *base_path, const char *filename);
int bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
int generated_co_wrapper
bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
int generated_co_wrapper
bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
int64_t pos, int size);