50 lines
1.6 KiB
Diff
50 lines
1.6 KiB
Diff
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From 652325f9a04143ffabf5e9a418253a05e927ec37 Mon Sep 17 00:00:00 2001
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From: WangJian <wangjian161@huawei.com>
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Date: Wed, 9 Feb 2022 11:18:21 +0800
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Subject: [PATCH] block: enable cache mode of empty cdrom
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enable cache mode even if cdrom is empty
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Signed-off-by: wangjian161 <wangjian161@huawei.com>
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---
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blockdev.c | 16 ++++++++++++++++
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1 file changed, 16 insertions(+)
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diff --git a/blockdev.c b/blockdev.c
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index c91f49e7b6..bc2099e9da 100644
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--- a/blockdev.c
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+++ b/blockdev.c
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@@ -493,6 +493,7 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
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QDict *interval_dict = NULL;
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QList *interval_list = NULL;
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const char *id;
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+ const char *cache;
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BlockdevDetectZeroesOptions detect_zeroes =
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BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
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const char *throttling_group = NULL;
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@@ -580,6 +581,21 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
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read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false);
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+ if (!file || !*file) {
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+ cache = qdict_get_try_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH);
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+ if (cache && !strcmp(cache, "on")) {
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+ bdrv_flags |= BDRV_O_NO_FLUSH;
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+ }
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+
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+ cache = qdict_get_try_str(bs_opts, BDRV_OPT_CACHE_DIRECT);
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+ if (cache && !strcmp(cache, "on")) {
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+ bdrv_flags |= BDRV_O_NOCACHE;
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+ }
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+
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+ qdict_del(bs_opts, BDRV_OPT_CACHE_NO_FLUSH);
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+ qdict_del(bs_opts, BDRV_OPT_CACHE_DIRECT);
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+ }
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+
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/* init */
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if ((!file || !*file) && !qdict_size(bs_opts)) {
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BlockBackendRootState *blk_rs;
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--
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2.27.0
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