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block: introduce bdrv_get_block_status API 

For now, bdrv_get_block_status is just another name for bdrv_is_allocated.
The next patches will add more flags.

This also touches all block drivers with a mostly mechanical rename.  The
sole exception is cow; because it calls cow_co_is_allocated from the read
code, we keep that function and make cow_co_get_block_status a wrapper.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-09-04 19:00:28 +02:00 committed by Stefan Hajnoczi
parent 11212d8fa0
commit b6b8a33354
13 changed files with 61 additions and 47 deletions
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46
block.c
View File

@ -3044,15 +3044,15 @@ int bdrv_has_zero_init(BlockDriverState *bs)
return 0;
}
typedef struct BdrvCoIsAllocatedData {
typedef struct BdrvCoGetBlockStatusData {
BlockDriverState *bs;
BlockDriverState *base;
int64_t sector_num;
int nb_sectors;
int *pnum;
int ret;
int64_t ret;
bool done;
} BdrvCoIsAllocatedData;
} BdrvCoGetBlockStatusData;
/*
* Returns true iff the specified sector is present in the disk image. Drivers
@ -3069,9 +3069,9 @@ typedef struct BdrvCoIsAllocatedData {
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
* beyond the end of the disk image it will be clamped.
*/
static int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
int64_t length;
int64_t n;
@ -3091,35 +3091,35 @@ static int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs,
nb_sectors = n;
}
if (!bs->drv->bdrv_co_is_allocated) {
if (!bs->drv->bdrv_co_get_block_status) {
*pnum = nb_sectors;
return 1;
}
return bs->drv->bdrv_co_is_allocated(bs, sector_num, nb_sectors, pnum);
return bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
}
/* Coroutine wrapper for bdrv_is_allocated() */
static void coroutine_fn bdrv_is_allocated_co_entry(void *opaque)
/* Coroutine wrapper for bdrv_get_block_status() */
static void coroutine_fn bdrv_get_block_status_co_entry(void *opaque)
{
BdrvCoIsAllocatedData *data = opaque;
BdrvCoGetBlockStatusData *data = opaque;
BlockDriverState *bs = data->bs;
data->ret = bdrv_co_is_allocated(bs, data->sector_num, data->nb_sectors,
data->pnum);
data->ret = bdrv_co_get_block_status(bs, data->sector_num, data->nb_sectors,
data->pnum);
data->done = true;
}
/*
* Synchronous wrapper around bdrv_co_is_allocated().
* Synchronous wrapper around bdrv_co_get_block_status().
*
* See bdrv_co_is_allocated() for details.
* See bdrv_co_get_block_status() for details.
*/
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
int *pnum)
int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, int *pnum)
{
Coroutine *co;
BdrvCoIsAllocatedData data = {
BdrvCoGetBlockStatusData data = {
.bs = bs,
.sector_num = sector_num,
.nb_sectors = nb_sectors,
@ -3129,9 +3129,9 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
if (qemu_in_coroutine()) {
/* Fast-path if already in coroutine context */
bdrv_is_allocated_co_entry(&data);
bdrv_get_block_status_co_entry(&data);
} else {
co = qemu_coroutine_create(bdrv_is_allocated_co_entry);
co = qemu_coroutine_create(bdrv_get_block_status_co_entry);
qemu_coroutine_enter(co, &data);
while (!data.done) {
qemu_aio_wait();
@ -3140,6 +3140,12 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
return data.ret;
}
int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, int *pnum)
{
return bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
}
/*
* Given an image chain: ... -> [BASE] -> [INTER1] -> [INTER2] -> [TOP]
*

8
block/cow.c
View File

@ -188,6 +188,12 @@ static int coroutine_fn cow_co_is_allocated(BlockDriverState *bs,
return changed;
}
static int64_t coroutine_fn cow_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *num_same)
{
return cow_co_is_allocated(bs, sector_num, nb_sectors, num_same);
}
static int cow_update_bitmap(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
@ -371,7 +377,7 @@ static BlockDriver bdrv_cow = {
.bdrv_read = cow_co_read,
.bdrv_write = cow_co_write,
.bdrv_co_is_allocated = cow_co_is_allocated,
.bdrv_co_get_block_status = cow_co_get_block_status,
.create_options = cow_create_options,
};

4
block/qcow.c
View File

@ -395,7 +395,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
return cluster_offset;
}
static int coroutine_fn qcow_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn qcow_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
BDRVQcowState *s = bs->opaque;
@ -896,7 +896,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_co_readv = qcow_co_readv,
.bdrv_co_writev = qcow_co_writev,
.bdrv_co_is_allocated = qcow_co_is_allocated,
.bdrv_co_get_block_status = qcow_co_get_block_status,
.bdrv_set_key = qcow_set_key,
.bdrv_make_empty = qcow_make_empty,

4
block/qcow2.c
View File

@ -688,7 +688,7 @@ static int qcow2_reopen_prepare(BDRVReopenState *state,
return 0;
}
static int coroutine_fn qcow2_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
BDRVQcowState *s = bs->opaque;
@ -1866,7 +1866,7 @@ static BlockDriver bdrv_qcow2 = {
.bdrv_reopen_prepare = qcow2_reopen_prepare,
.bdrv_create = qcow2_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_is_allocated = qcow2_co_is_allocated,
.bdrv_co_get_block_status = qcow2_co_get_block_status,
.bdrv_set_key = qcow2_set_key,
.bdrv_make_empty = qcow2_make_empty,

4
block/qed.c
View File

@ -667,7 +667,7 @@ static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t l
}
}
static int coroutine_fn bdrv_qed_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
@ -1575,7 +1575,7 @@ static BlockDriver bdrv_qed = {
.bdrv_reopen_prepare = bdrv_qed_reopen_prepare,
.bdrv_create = bdrv_qed_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_is_allocated = bdrv_qed_co_is_allocated,
.bdrv_co_get_block_status = bdrv_qed_co_get_block_status,
.bdrv_make_empty = bdrv_qed_make_empty,
.bdrv_aio_readv = bdrv_qed_aio_readv,
.bdrv_aio_writev = bdrv_qed_aio_writev,

4
block/raw-posix.c
View File

@ -1084,7 +1084,7 @@ static int raw_create(const char *filename, QEMUOptionParameter *options)
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
* beyond the end of the disk image it will be clamped.
*/
static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
@ -1200,7 +1200,7 @@ static BlockDriver bdrv_file = {
.bdrv_close = raw_close,
.bdrv_create = raw_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_is_allocated = raw_co_is_allocated,
.bdrv_co_get_block_status = raw_co_get_block_status,
.bdrv_aio_readv = raw_aio_readv,
.bdrv_aio_writev = raw_aio_writev,

10
block/raw_bsd.c
View File

@ -58,11 +58,11 @@ static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
return bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
}
static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
int *pnum)
static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
return bdrv_is_allocated(bs->file, sector_num, nb_sectors, pnum);
return bdrv_get_block_status(bs->file, sector_num, nb_sectors, pnum);
}
static int coroutine_fn raw_co_write_zeroes(BlockDriverState *bs,
@ -164,7 +164,7 @@ static BlockDriver bdrv_raw = {
.bdrv_co_writev = &raw_co_writev,
.bdrv_co_write_zeroes = &raw_co_write_zeroes,
.bdrv_co_discard = &raw_co_discard,
.bdrv_co_is_allocated = &raw_co_is_allocated,
.bdrv_co_get_block_status = &raw_co_get_block_status,
.bdrv_truncate = &raw_truncate,
.bdrv_getlength = &raw_getlength,
.bdrv_get_info = &raw_get_info,

12
block/sheepdog.c
View File

@ -2270,9 +2270,9 @@ static coroutine_fn int sd_co_discard(BlockDriverState *bs, int64_t sector_num,
return acb->ret;
}
static coroutine_fn int
sd_co_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
int *pnum)
static coroutine_fn int64_t
sd_co_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
int *pnum)
{
BDRVSheepdogState *s = bs->opaque;
SheepdogInode *inode = &s->inode;
@ -2338,7 +2338,7 @@ static BlockDriver bdrv_sheepdog = {
.bdrv_co_writev = sd_co_writev,
.bdrv_co_flush_to_disk = sd_co_flush_to_disk,
.bdrv_co_discard = sd_co_discard,
.bdrv_co_is_allocated = sd_co_is_allocated,
.bdrv_co_get_block_status = sd_co_get_block_status,
.bdrv_snapshot_create = sd_snapshot_create,
.bdrv_snapshot_goto = sd_snapshot_goto,
@ -2366,7 +2366,7 @@ static BlockDriver bdrv_sheepdog_tcp = {
.bdrv_co_writev = sd_co_writev,
.bdrv_co_flush_to_disk = sd_co_flush_to_disk,
.bdrv_co_discard = sd_co_discard,
.bdrv_co_is_allocated = sd_co_is_allocated,
.bdrv_co_get_block_status = sd_co_get_block_status,
.bdrv_snapshot_create = sd_snapshot_create,
.bdrv_snapshot_goto = sd_snapshot_goto,
@ -2394,7 +2394,7 @@ static BlockDriver bdrv_sheepdog_unix = {
.bdrv_co_writev = sd_co_writev,
.bdrv_co_flush_to_disk = sd_co_flush_to_disk,
.bdrv_co_discard = sd_co_discard,
.bdrv_co_is_allocated = sd_co_is_allocated,
.bdrv_co_get_block_status = sd_co_get_block_status,
.bdrv_snapshot_create = sd_snapshot_create,
.bdrv_snapshot_goto = sd_snapshot_goto,

4
block/vdi.c
View File

@ -470,7 +470,7 @@ static int vdi_reopen_prepare(BDRVReopenState *state,
return 0;
}
static int coroutine_fn vdi_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn vdi_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
/* TODO: Check for too large sector_num (in bdrv_is_allocated or here). */
@ -780,7 +780,7 @@ static BlockDriver bdrv_vdi = {
.bdrv_reopen_prepare = vdi_reopen_prepare,
.bdrv_create = vdi_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_is_allocated = vdi_co_is_allocated,
.bdrv_co_get_block_status = vdi_co_get_block_status,
.bdrv_make_empty = vdi_make_empty,
.bdrv_read = vdi_co_read,

4
block/vmdk.c
View File

@ -1042,7 +1042,7 @@ static VmdkExtent *find_extent(BDRVVmdkState *s,
return NULL;
}
static int coroutine_fn vmdk_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
BDRVVmdkState *s = bs->opaque;
@ -1837,7 +1837,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
.bdrv_co_flush_to_disk = vmdk_co_flush,
.bdrv_co_is_allocated = vmdk_co_is_allocated,
.bdrv_co_get_block_status = vmdk_co_get_block_status,
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
.bdrv_has_zero_init = vmdk_has_zero_init,

4
block/vvfat.c
View File

@ -2874,7 +2874,7 @@ static coroutine_fn int vvfat_co_write(BlockDriverState *bs, int64_t sector_num,
return ret;
}
static int coroutine_fn vvfat_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn vvfat_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int* n)
{
BDRVVVFATState* s = bs->opaque;
@ -2984,7 +2984,7 @@ static BlockDriver bdrv_vvfat = {
.bdrv_read = vvfat_co_read,
.bdrv_write = vvfat_co_write,
.bdrv_co_is_allocated = vvfat_co_is_allocated,
.bdrv_co_get_block_status = vvfat_co_get_block_status,
};
static void bdrv_vvfat_init(void)

2
include/block/block.h
View File

@ -269,6 +269,8 @@ int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
int bdrv_has_zero_init_1(BlockDriverState *bs);
int bdrv_has_zero_init(BlockDriverState *bs);
int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, int *pnum);
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
int *pnum);
int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,

2
include/block/block_int.h
View File

@ -118,7 +118,7 @@ struct BlockDriver {
int64_t sector_num, int nb_sectors);
int coroutine_fn (*bdrv_co_discard)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors);
int coroutine_fn (*bdrv_co_is_allocated)(BlockDriverState *bs,
int64_t coroutine_fn (*bdrv_co_get_block_status)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum);
/*