From patchwork Tue Jun 15 14:19:36 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [14/19] block: New bdrv_next() From: Kevin Wolf X-Patchwork-Id: 55685 Message-Id: <1276611581-3757-15-git-send-email-kwolf@redhat.com> To: anthony@codemonkey.ws Cc: kwolf@redhat.com, qemu-devel@nongnu.org Date: Tue, 15 Jun 2010 16:19:36 +0200 From: Markus Armbruster This is a more flexible alternative to bdrv_iterate(). Signed-off-by: Markus Armbruster Signed-off-by: Kevin Wolf --- block.c | 8 ++++++++ block.h | 1 + 2 files changed, 9 insertions(+), 0 deletions(-) diff --git a/block.c b/block.c index df2d3a6..383d59f 100644 --- a/block.c +++ b/block.c @@ -1330,6 +1330,14 @@ BlockDriverState *bdrv_find(const char *name) return NULL; } +BlockDriverState *bdrv_next(BlockDriverState *bs) +{ + if (!bs) { + return QTAILQ_FIRST(&bdrv_states); + } + return QTAILQ_NEXT(bs, list); +} + void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) { BlockDriverState *bs; diff --git a/block.h b/block.h index 1f69cbd..9df9b38 100644 --- a/block.h +++ b/block.h @@ -168,6 +168,7 @@ void bdrv_set_change_cb(BlockDriverState *bs, void (*change_cb)(void *opaque), void *opaque); void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size); BlockDriverState *bdrv_find(const char *name); +BlockDriverState *bdrv_next(BlockDriverState *bs); void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque); int bdrv_is_encrypted(BlockDriverState *bs);