From: Max Reitz Date: Wed, 18 Sep 2019 09:51:37 +0000 (+0200) Subject: block: Handle filter truncation like native impl. X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=6b7e8f8b1ce7b41527a7c408491e93f90a442bfc;p=qmiga%2Fqemu.git block: Handle filter truncation like native impl. Make the filter truncation (passing it through to bs->file) a first-class citizen and handle it exactly as if it was the filter driver's native implementation of .bdrv_co_truncate(). I do not see a reason not to, it makes the code a bit shorter, and may be even more correct because this gets us to finish the write_req that we prepared before (may be important to e.g. bring dirty bitmaps to the correct size). Signed-off-by: Max Reitz Message-id: 20190918095144.955-2-mreitz@redhat.com Reviewed-by: Maxim Levitsky Signed-off-by: Max Reitz --- diff --git a/block/io.c b/block/io.c index f0b86c1d19..8ff3b47fb4 100644 --- a/block/io.c +++ b/block/io.c @@ -3347,20 +3347,19 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, goto out; } - if (!drv->bdrv_co_truncate) { - if (bs->file && drv->is_filter) { - ret = bdrv_co_truncate(bs->file, offset, prealloc, errp); - goto out; - } + if (drv->bdrv_co_truncate) { + ret = drv->bdrv_co_truncate(bs, offset, prealloc, errp); + } else if (bs->file && drv->is_filter) { + ret = bdrv_co_truncate(bs->file, offset, prealloc, errp); + } else { error_setg(errp, "Image format driver does not support resize"); ret = -ENOTSUP; goto out; } - - ret = drv->bdrv_co_truncate(bs, offset, prealloc, errp); if (ret < 0) { goto out; } + ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS); if (ret < 0) { error_setg_errno(errp, -ret, "Could not refresh total sector count");