37 lines
1.1 KiB
Diff
37 lines
1.1 KiB
Diff
From 56f59125707c0222bbb5d7f820792aba17c3db08 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 11:10:42 +0800
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Subject: [PATCH] qemu-pr: fixed ioctl failed for multipath disk
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We use ioctl to detect multipath devices. However, we only set flags in
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struct dm_ioctl (the argument to ioctl) and left other fields in random,
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which may cause the failure of calling ioctl. Hence, we set other
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fields to 0 to avoid the failure.
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Signed-off-by: wangjian161 <wangjian161@huawei.com>
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---
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scsi/qemu-pr-helper.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c
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index f281daeced..bbb9b57741 100644
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--- a/scsi/qemu-pr-helper.c
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+++ b/scsi/qemu-pr-helper.c
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@@ -288,9 +288,12 @@ static void multipath_pr_init(void)
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static int is_mpath(int fd)
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{
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- struct dm_ioctl dm = { .flags = DM_NOFLUSH_FLAG };
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+ struct dm_ioctl dm;
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struct dm_target_spec *tgt;
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+ memset(&dm, 0, sizeof(struct dm_ioctl));
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+ dm.flags = DM_NOFLUSH_FLAG;
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+
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tgt = dm_dev_ioctl(fd, DM_TABLE_STATUS, &dm);
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if (!tgt) {
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if (errno == ENXIO) {
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--
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2.27.0
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