From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55788) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dS9cn-0007UU-4g for qemu-devel@nongnu.org; Mon, 03 Jul 2017 18:15:22 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dS9cl-0004S8-PP for qemu-devel@nongnu.org; Mon, 03 Jul 2017 18:15:21 -0400 From: Eric Blake Date: Mon, 3 Jul 2017 17:14:42 -0500 Message-Id: <20170703221456.30817-2-eblake@redhat.com> In-Reply-To: <20170703221456.30817-1-eblake@redhat.com> References: <20170703221456.30817-1-eblake@redhat.com> Subject: [Qemu-devel] [PATCH v2 01/15] block: add default implementations for bdrv_co_get_block_status() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, jsnow@redhat.com, qemu-block@nongnu.org, el13635@mail.ntua.gr, Max Reitz , Jeff Cody , Stefan Hajnoczi , Fam Zheng From: Manos Pitsidianakis bdrv_co_get_block_status_from_file() and bdrv_co_get_block_status_from_backing() set *file to bs->file and bs->backing respectively, so that bdrv_co_get_block_status() can recurse to them. Future block drivers won't have to duplicate code to implement this. Reviewed-by: Stefan Hajnoczi Signed-off-by: Manos Pitsidianakis Message-Id: <20170629184320.7151-4-el13635@mail.ntua.gr> --- v2: Including this patch from Manos, since it affects my later patches; however, I anticipate that we will get a full v3 series from Manos merged first --- include/block/block_int.h | 16 ++++++++++++++++ block/blkdebug.c | 12 +----------- block/commit.c | 12 +----------- block/io.c | 24 ++++++++++++++++++++++++ block/mirror.c | 12 +----------- 5 files changed, 43 insertions(+), 33 deletions(-) diff --git a/include/block/block_int.h b/include/block/block_int.h index 226232d..724799c 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -958,6 +958,22 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c, uint64_t perm, uint64_t shared, uint64_t *nperm, uint64_t *nshared); +/* + * Default implementation for drivers to pass bdrv_co_get_block_status() to + * their file + * */ +int64_t coroutine_fn bdrv_co_get_block_status_from_file(BlockDriverState *bs, + int64_t sector_num, + int nb_sectors, int *pnum, + BlockDriverState **file); +/* + * Default implementation for drivers to pass bdrv_co_get_block_status() to + * their backing file + * */ +int64_t coroutine_fn bdrv_co_get_block_status_from_backing(BlockDriverState *bs, + int64_t sector_num, + int nb_sectors, int *pnum, + BlockDriverState **file); const char *bdrv_get_parent_name(const BlockDriverState *bs); void blk_dev_change_media_cb(BlockBackend *blk, bool load, Error **errp); bool blk_dev_has_removable_media(BlockBackend *blk); diff --git a/block/blkdebug.c b/block/blkdebug.c index b25856c..f1539db 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -641,16 +641,6 @@ static int coroutine_fn blkdebug_co_pdiscard(BlockDriverState *bs, return bdrv_co_pdiscard(bs->file->bs, offset, bytes); } -static int64_t coroutine_fn blkdebug_co_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file) -{ - *pnum = nb_sectors; - *file = bs->file->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); -} - static void blkdebug_close(BlockDriverState *bs) { BDRVBlkdebugState *s = bs->opaque; @@ -925,7 +915,7 @@ static BlockDriver bdrv_blkdebug = { .bdrv_co_flush_to_disk = blkdebug_co_flush, .bdrv_co_pwrite_zeroes = blkdebug_co_pwrite_zeroes, .bdrv_co_pdiscard = blkdebug_co_pdiscard, - .bdrv_co_get_block_status = blkdebug_co_get_block_status, + .bdrv_co_get_block_status = bdrv_co_get_block_status_from_file, .bdrv_debug_event = blkdebug_debug_event, .bdrv_debug_breakpoint = blkdebug_debug_breakpoint, diff --git a/block/commit.c b/block/commit.c index 774a8a5..9e875a6 100644 --- a/block/commit.c +++ b/block/commit.c @@ -242,16 +242,6 @@ static int coroutine_fn bdrv_commit_top_preadv(BlockDriverState *bs, return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags); } -static int64_t coroutine_fn bdrv_commit_top_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file) -{ - *pnum = nb_sectors; - *file = bs->backing->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); -} - static void bdrv_commit_top_refresh_filename(BlockDriverState *bs, QDict *opts) { bdrv_refresh_filename(bs->backing->bs); @@ -277,7 +267,7 @@ static void bdrv_commit_top_child_perm(BlockDriverState *bs, BdrvChild *c, static BlockDriver bdrv_commit_top = { .format_name = "commit_top", .bdrv_co_preadv = bdrv_commit_top_preadv, - .bdrv_co_get_block_status = bdrv_commit_top_get_block_status, + .bdrv_co_get_block_status = bdrv_co_get_block_status_from_backing, .bdrv_refresh_filename = bdrv_commit_top_refresh_filename, .bdrv_close = bdrv_commit_top_close, .bdrv_child_perm = bdrv_commit_top_child_perm, diff --git a/block/io.c b/block/io.c index 53c01cf..8c67ba8 100644 --- a/block/io.c +++ b/block/io.c @@ -1689,6 +1689,30 @@ typedef struct BdrvCoGetBlockStatusData { bool done; } BdrvCoGetBlockStatusData; +int64_t coroutine_fn bdrv_co_get_block_status_from_file(BlockDriverState *bs, + int64_t sector_num, + int nb_sectors, int *pnum, + BlockDriverState **file) +{ + assert(bs->file && bs->file->bs); + *pnum = nb_sectors; + *file = bs->file->bs; + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | + (sector_num << BDRV_SECTOR_BITS); +} + +int64_t coroutine_fn bdrv_co_get_block_status_from_backing(BlockDriverState *bs, + int64_t sector_num, + int nb_sectors, int *pnum, + BlockDriverState **file) +{ + assert(bs->backing && bs->backing->bs); + *pnum = nb_sectors; + *file = bs->backing->bs; + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | + (sector_num << BDRV_SECTOR_BITS); +} + /* * Returns the allocation status of the specified sectors. * Drivers not implementing the functionality are assumed to not support diff --git a/block/mirror.c b/block/mirror.c index 6f54dcc..4e883bc 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1043,16 +1043,6 @@ static int coroutine_fn bdrv_mirror_top_flush(BlockDriverState *bs) return bdrv_co_flush(bs->backing->bs); } -static int64_t coroutine_fn bdrv_mirror_top_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file) -{ - *pnum = nb_sectors; - *file = bs->backing->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); -} - static int coroutine_fn bdrv_mirror_top_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes, BdrvRequestFlags flags) { @@ -1099,7 +1089,7 @@ static BlockDriver bdrv_mirror_top = { .bdrv_co_pwrite_zeroes = bdrv_mirror_top_pwrite_zeroes, .bdrv_co_pdiscard = bdrv_mirror_top_pdiscard, .bdrv_co_flush = bdrv_mirror_top_flush, - .bdrv_co_get_block_status = bdrv_mirror_top_get_block_status, + .bdrv_co_get_block_status = bdrv_co_get_block_status_from_backing, .bdrv_refresh_filename = bdrv_mirror_top_refresh_filename, .bdrv_close = bdrv_mirror_top_close, .bdrv_child_perm = bdrv_mirror_top_child_perm, -- 2.9.4