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block/dirty-bitmap: add bdrv_dirty_bitmap_get

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Add a public interface for get. While we're at it,
rename "bdrv_get_dirty_bitmap_locked" to "bdrv_dirty_bitmap_get_locked".

(There are more functions to rename to the bdrv_dirty_bitmap_VERB form,
but they will wait until the conclusion of this series.)

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-11-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2019-07-29 16:35:53 -04:00
parent b7661ca5d8
commit 28636b8211
5 changed files with 18 additions and 14 deletions
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19
block/dirty-bitmap.c
View file

@ -509,14 +509,19 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
}
/* Called within bdrv_dirty_bitmap_lock..unlock */
bool bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
int64_t offset)
bool bdrv_dirty_bitmap_get_locked(BdrvDirtyBitmap *bitmap, int64_t offset)
{
if (bitmap) {
return hbitmap_get(bitmap->bitmap, offset);
} else {
return false;
}
return hbitmap_get(bitmap->bitmap, offset);
}
bool bdrv_dirty_bitmap_get(BdrvDirtyBitmap *bitmap, int64_t offset)
{
bool ret;
bdrv_dirty_bitmap_lock(bitmap);
ret = bdrv_dirty_bitmap_get_locked(bitmap, offset);
bdrv_dirty_bitmap_unlock(bitmap);
return ret;
}
/**

2
block/mirror.c
View file

@ -476,7 +476,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
int64_t next_offset = offset + nb_chunks * s->granularity;
int64_t next_chunk = next_offset / s->granularity;
if (next_offset >= s->bdev_length ||
!bdrv_get_dirty_locked(source, s->dirty_bitmap, next_offset)) {
!bdrv_dirty_bitmap_get_locked(s->dirty_bitmap, next_offset)) {
break;
}
if (test_bit(next_chunk, s->in_flight_bitmap)) {

4
include/block/dirty-bitmap.h
View file

@ -84,12 +84,12 @@ void bdrv_dirty_bitmap_set_busy(BdrvDirtyBitmap *bitmap, bool busy);
void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src,
HBitmap **backup, Error **errp);
void bdrv_dirty_bitmap_set_migration(BdrvDirtyBitmap *bitmap, bool migration);
bool bdrv_dirty_bitmap_get(BdrvDirtyBitmap *bitmap, int64_t offset);
/* Functions that require manual locking. */
void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap);
void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap);
bool bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
int64_t offset);
bool bdrv_dirty_bitmap_get_locked(BdrvDirtyBitmap *bitmap, int64_t offset);
void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,
int64_t offset, int64_t bytes);
void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,

5
migration/block.c
View file

@ -521,7 +521,6 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds,
int is_async)
{
BlkMigBlock *blk;
BlockDriverState *bs = blk_bs(bmds->blk);
int64_t total_sectors = bmds->total_sectors;
int64_t sector;
int nr_sectors;
@ -536,8 +535,8 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds,
blk_mig_unlock();
}
bdrv_dirty_bitmap_lock(bmds->dirty_bitmap);
if (bdrv_get_dirty_locked(bs, bmds->dirty_bitmap,
sector * BDRV_SECTOR_SIZE)) {
if (bdrv_dirty_bitmap_get_locked(bmds->dirty_bitmap,
sector * BDRV_SECTOR_SIZE)) {
if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {
nr_sectors = total_sectors - sector;
} else {

2
nbd/server.c
View file

@ -2004,7 +2004,7 @@ static unsigned int bitmap_to_extents(BdrvDirtyBitmap *bitmap, uint64_t offset,
bdrv_dirty_bitmap_lock(bitmap);
it = bdrv_dirty_iter_new(bitmap);
dirty = bdrv_get_dirty_locked(NULL, bitmap, offset);
dirty = bdrv_dirty_bitmap_get_locked(bitmap, offset);
assert(begin < overall_end && nb_extents);
while (begin < overall_end && i < nb_extents) {