From 9524df7825fb4129ced104f1615281634936ee96 Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Fri, 18 Sep 2015 14:19:08 +0200 Subject: [PATCH 01/10] block-backend: Expose bdrv_write_zeroes() Message-id: <1442585950-6502-2-git-send-email-mreitz@redhat.com> Patchwork-id: 67831 O-Subject: [RHEV-7.2 qemu-kvm-rhev PATCH 1/3] block-backend: Expose bdrv_write_zeroes() Bugzilla: 1256541 RH-Acked-by: Miroslav Rezanina RH-Acked-by: Paolo Bonzini RH-Acked-by: Kevin Wolf From: Kevin Wolf Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz (cherry picked from commit 0df89e8e6f62aea32a7302e73a86b7bfe5821018) Signed-off-by: Max Reitz Signed-off-by: Miroslav Rezanina --- block/block-backend.c | 11 +++++++++++ include/sysemu/block-backend.h | 2 ++ 2 files changed, 13 insertions(+) diff --git a/block/block-backend.c b/block/block-backend.c index 48b6e4c..93e46f3 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -515,6 +515,17 @@ int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, return bdrv_write(blk->bs, sector_num, buf, nb_sectors); } +int blk_write_zeroes(BlockBackend *blk, int64_t sector_num, + int nb_sectors, BdrvRequestFlags flags) +{ + int ret = blk_check_request(blk, sector_num, nb_sectors); + if (ret < 0) { + return ret; + } + + return bdrv_write_zeroes(blk->bs, sector_num, nb_sectors, flags); +} + static void error_callback_bh(void *opaque) { struct BlockBackendAIOCB *acb = opaque; diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 77e9b9c..b4a4d5e 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -87,6 +87,8 @@ int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf, int nb_sectors); int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, int nb_sectors); +int blk_write_zeroes(BlockBackend *blk, int64_t sector_num, + int nb_sectors, BdrvRequestFlags flags); BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num, int nb_sectors, BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque); -- 1.8.3.1