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dm mpath: reject messages when device is suspended 

This patch rejects messages that can generate I/O while the device
itself is suspended.

Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Kiyoshi Ueda 2009-12-10 23:52:27 +00:00 committed by Alasdair G Kergon
parent 64dbce580d
commit c2f3d24b78
1 changed files with 5 additions and 0 deletions
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5
drivers/md/dm-mpath.c
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@ -1433,6 +1433,11 @@ static int multipath_message(struct dm_target *ti, unsigned argc, char **argv)
goto out;
}
if (dm_suspended(ti)) {
r = -EBUSY;
goto out;
}
if (argc == 1) {
if (!strnicmp(argv[0], MESG_STR("queue_if_no_path"))) {
r = queue_if_no_path(m, 1, 0);