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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Benjamin Marzinski <bmarzins@redhat.com>
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Date: Wed, 30 Mar 2022 15:14:56 -0500
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Subject: [PATCH] multipath: return failure on an invalid remove command
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When "multipath -f" is run on a device that doesn't exist or isn't a
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multipath device, the command will not remove any device, but it will
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still return success. Multiple functions rely on _dm_flush_map()
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returning success when called with name that doesn't match any
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multipath device. So before calling _dm_flush_map(), call dm_is_mpath(),
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to check if the device exists and is a multipath device, and return
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failure if it's not.
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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Reviewed-by: Martin Wilck
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---
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multipath/main.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/multipath/main.c b/multipath/main.c
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index 80fa68e5..41d01c7e 100644
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--- a/multipath/main.c
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+++ b/multipath/main.c
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@@ -1111,6 +1111,11 @@ main (int argc, char *argv[])
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if (retries < 0)
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retries = conf->remove_retries;
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if (cmd == CMD_FLUSH_ONE) {
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+ if (dm_is_mpath(dev) != 1) {
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+ condlog(0, "%s is not a multipath device", dev);
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+ r = RTVL_FAIL;
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+ goto out;
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+ }
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r = dm_suspend_and_flush_map(dev, retries) ?
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RTVL_FAIL : RTVL_OK;
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goto out;
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