diff options
Diffstat (limited to 'block/nbd.c')
| -rw-r--r-- | block/nbd.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/block/nbd.c b/block/nbd.c index 76f04d863c..882b2dc84a 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -47,6 +47,7 @@ #endif typedef struct BDRVNBDState { + CoMutex lock; int sock; uint32_t nbdflags; off_t size; @@ -175,6 +176,7 @@ static int nbd_open(BlockDriverState *bs, const char* filename, int flags) */ result = nbd_establish_connection(bs); + qemu_co_mutex_init(&s->lock); return result; } @@ -238,6 +240,28 @@ static int nbd_write(BlockDriverState *bs, int64_t sector_num, return 0; } +static coroutine_fn int nbd_co_read(BlockDriverState *bs, int64_t sector_num, + uint8_t *buf, int nb_sectors) +{ + int ret; + BDRVNBDState *s = bs->opaque; + qemu_co_mutex_lock(&s->lock); + ret = nbd_read(bs, sector_num, buf, nb_sectors); + qemu_co_mutex_unlock(&s->lock); + return ret; +} + +static coroutine_fn int nbd_co_write(BlockDriverState *bs, int64_t sector_num, + const uint8_t *buf, int nb_sectors) +{ + int ret; + BDRVNBDState *s = bs->opaque; + qemu_co_mutex_lock(&s->lock); + ret = nbd_write(bs, sector_num, buf, nb_sectors); + qemu_co_mutex_unlock(&s->lock); + return ret; +} + static void nbd_close(BlockDriverState *bs) { BDRVNBDState *s = bs->opaque; @@ -258,8 +282,8 @@ static BlockDriver bdrv_nbd = { .format_name = "nbd", .instance_size = sizeof(BDRVNBDState), .bdrv_file_open = nbd_open, - .bdrv_read = nbd_read, - .bdrv_write = nbd_write, + .bdrv_read = nbd_co_read, + .bdrv_write = nbd_co_write, .bdrv_close = nbd_close, .bdrv_getlength = nbd_getlength, .protocol_name = "nbd", |