diff options
Diffstat (limited to 'block/dmg.c')
| -rw-r--r-- | block/dmg.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/block/dmg.c b/block/dmg.c index 64c3cce46a..37902a4347 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -28,6 +28,7 @@ #include <zlib.h> typedef struct BDRVDMGState { + CoMutex lock; /* each chunk contains a certain number of sectors, * offsets[i] is the offset in the .dmg file, * lengths[i] is the length of the compressed chunk, @@ -177,6 +178,7 @@ static int dmg_open(BlockDriverState *bs, int flags) s->current_chunk = s->n_chunks; + qemu_co_mutex_init(&s->lock); return 0; fail: return -1; @@ -280,6 +282,17 @@ static int dmg_read(BlockDriverState *bs, int64_t sector_num, return 0; } +static coroutine_fn int dmg_co_read(BlockDriverState *bs, int64_t sector_num, + uint8_t *buf, int nb_sectors) +{ + int ret; + BDRVDMGState *s = bs->opaque; + qemu_co_mutex_lock(&s->lock); + ret = dmg_read(bs, sector_num, buf, nb_sectors); + qemu_co_mutex_unlock(&s->lock); + return ret; +} + static void dmg_close(BlockDriverState *bs) { BDRVDMGState *s = bs->opaque; @@ -300,7 +313,7 @@ static BlockDriver bdrv_dmg = { .instance_size = sizeof(BDRVDMGState), .bdrv_probe = dmg_probe, .bdrv_open = dmg_open, - .bdrv_read = dmg_read, + .bdrv_read = dmg_co_read, .bdrv_close = dmg_close, }; |