From: Dong Xu Wang <wdon...@linux.vnet.ibm.com> Some block drivers can verify their image files are clean or not. So we can show it while using "qemu-img info"
CC: Kevin Wolf <kw...@redhat.com> CC: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com> Signed-off-by: Dong Xu Wang <wdon...@linux.vnet.ibm.com> --- Previous discussion can be found at: http://patchwork.ozlabs.org/patch/128730/ block.c | 14 ++++++++++++++ block.h | 2 ++ block_int.h | 1 + qemu-img.c | 3 +++ 4 files changed, 20 insertions(+), 0 deletions(-) diff --git a/block.c b/block.c index 3f072f6..24fd774 100644 --- a/block.c +++ b/block.c @@ -186,6 +186,20 @@ static void bdrv_io_limits_intercept(BlockDriverState *bs, qemu_co_queue_next(&bs->throttled_reqs); } +/* check if the image is dirty */ +int bdrv_is_dirty(BlockDriverState *bs) +{ + BlockDriver *drv = bs->drv; + + if (!drv) { + return 0; + } + if (!drv->bdrv_is_dirty) { + return 0; + } + return drv->bdrv_is_dirty(bs); +} + /* check if the path starts with "<protocol>:" */ static int path_has_protocol(const char *path) { diff --git a/block.h b/block.h index 3bd4398..e3f3b55 100644 --- a/block.h +++ b/block.h @@ -104,6 +104,8 @@ void bdrv_io_limits_enable(BlockDriverState *bs); void bdrv_io_limits_disable(BlockDriverState *bs); bool bdrv_io_limits_enabled(BlockDriverState *bs); +int bdrv_is_dirty(BlockDriverState *bs); + void bdrv_init(void); void bdrv_init_with_whitelist(void); BlockDriver *bdrv_find_protocol(const char *filename); diff --git a/block_int.h b/block_int.h index 311bd2a..46afffb 100644 --- a/block_int.h +++ b/block_int.h @@ -84,6 +84,7 @@ struct BlockDriver { int (*bdrv_create)(const char *filename, QEMUOptionParameter *options); int (*bdrv_set_key)(BlockDriverState *bs, const char *key); int (*bdrv_make_empty)(BlockDriverState *bs); + int (*bdrv_is_dirty)(BlockDriverState *bs); /* aio */ BlockDriverAIOCB *(*bdrv_aio_readv)(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, diff --git a/qemu-img.c b/qemu-img.c index 01cc0d3..a79c274 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1153,6 +1153,9 @@ static int img_info(int argc, char **argv) if (bdrv_is_encrypted(bs)) { printf("encrypted: yes\n"); } + if (bdrv_is_dirty(bs)) { + printf("dirty,need check: yes\n"); + } if (bdrv_get_info(bs, &bdi) >= 0) { if (bdi.cluster_size != 0) { printf("cluster_size: %d\n", bdi.cluster_size); -- 1.7.5.4