3847094b7e
Update to v2.6.0, including enabling a few more recent features. Also include a number of recent security fixes. OBS-URL: https://build.opensuse.org/request/show/398983 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=294
57 lines
1.7 KiB
Diff
57 lines
1.7 KiB
Diff
From 33fcb26d3770b6ff5019d796595675a3275bfe46 Mon Sep 17 00:00:00 2001
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From: Olaf Hering <olaf@aepfle.de>
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Date: Thu, 24 Mar 2016 14:32:39 +0100
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Subject: [PATCH] block: split large discard requests from block frontend
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Large discard requests lead to sign expansion errors in qemu.
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Since there is no API to tell a guest about the limitations qmeu
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has to split a large request itself.
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[bsc#964427]
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Signed-off-by: Olaf Hering <olaf@aepfle.de>
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---
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block/io.c | 22 +++++++++++++++++++++-
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1 file changed, 21 insertions(+), 1 deletion(-)
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diff --git a/block/io.c b/block/io.c
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index a7dbf85..560fa4c 100644
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--- a/block/io.c
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+++ b/block/io.c
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@@ -2487,7 +2487,7 @@ static void coroutine_fn bdrv_discard_co_entry(void *opaque)
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rwco->ret = bdrv_co_discard(rwco->bs, rwco->sector_num, rwco->nb_sectors);
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}
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-int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
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+static int __bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors)
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{
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BdrvTrackedRequest req;
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@@ -2569,6 +2569,26 @@ out:
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return ret;
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}
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+int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
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+ int nb_sectors)
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+{
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+ int num, ret;
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+ int limit = BDRV_REQUEST_MAX_SECTORS;
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+ int remaining = nb_sectors;
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+ int64_t sector_offset = sector_num;
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+
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+ do {
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+ num = remaining > limit ? limit : remaining;
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+ ret = __bdrv_co_discard(bs, sector_offset, num);
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+ if (ret < 0)
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+ break;
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+ remaining -= num;
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+ sector_offset += num;
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+ } while (remaining > 0);
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+
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+ return ret;
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+}
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+
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int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors)
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{
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Coroutine *co;
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