From 45a86b54f64f4be4d9c04abc87e6d6ef2e724df0 Mon Sep 17 00:00:00 2001 Message-Id: <45a86b54f64f4be4d9c04abc87e6d6ef2e724df0.1379425497.git.minovotn@redhat.com> In-Reply-To: References: From: Paolo Bonzini Date: Fri, 6 Sep 2013 18:12:30 +0200 Subject: [PATCH 10/25] block: keep bs->total_sectors up to date even for growable block devices If a BlockDriverState is growable, after every write we need to check if bs->total_sectors might have changed. With this change, bdrv_getlength does not need anymore a system call. Signed-off-by: Paolo Bonzini Signed-off-by: Stefan Hajnoczi (cherry picked from commit df2a6f29a5019707d69f6eeb30cf792841cae5aa) Signed-off-by: Michal Novotny --- block.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/block.c b/block.c index ab7349e..39fb2e6 100644 --- a/block.c +++ b/block.c @@ -2305,6 +2305,9 @@ static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs, if (bs->wr_highest_sector < sector_num + nb_sectors - 1) { bs->wr_highest_sector = sector_num + nb_sectors - 1; } + if (bs->growable && ret >= 0) { + bs->total_sectors = MAX(bs->total_sectors, sector_num + nb_sectors); + } tracked_request_end(&req); @@ -2379,7 +2382,7 @@ int64_t bdrv_getlength(BlockDriverState *bs) if (!drv) return -ENOMEDIUM; - if (bs->growable || bdrv_dev_has_removable_media(bs)) { + if (bdrv_dev_has_removable_media(bs)) { if (drv->bdrv_getlength) { return drv->bdrv_getlength(bs); } -- 1.7.11.7