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lvchange: disable persistent minors for pools

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There is no reason to support persistent major/minor numbers
for pool volumes - it's only meant to be supported for filesystems
(since i.e. nfs may need to keep volume on a persistent device node.)

Support for pools is now explicitely disabled and documented.
This commit is contained in:
Zdenek Kabelac 2015-03-17 09:44:26 +01:00
parent 95fbbf4f40
commit a10a11bd54
5 changed files with 14 additions and 2 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.118 -
=================================
Disable lvchange of major and minor of pool LVs.
Fix pvscan --cache to not scan and read ignored metadata areas on PVs.
Add After=iscsi-shutdown.service to blk-availability.service systemd unit.
Disallow vgconvert from changing metadata format when lvmetad is used.

1
man/lvchange.8.in
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@ -279,6 +279,7 @@ Do not use this if dmeventd is already monitoring a device.
.TP
.BR \-M ", " \-\-persistent " {" \fIy | \fIn }
Set to y to make the minor number specified persistent.
Change of persistent numbers is not supported for pool volumes.
.TP
.BR \-p ", " \-\-permission " {" \fIr | \fIrw }
Change access permission to read-only or read/write.

4
test/shell/lvchange-cache.sh
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@ -18,6 +18,10 @@ lvcreate --type cache-pool -an -v -L 2 -n cpool $vg
lvcreate -H -L 4 -n corigin --cachepool $vg/cpool
lvcreate -n noncache -l 1 $vg
# cannot change major minor for pools
not lvchange --yes -M y --minor 235 --major 253 $vg/cpool
not lvchange -M n $vg/cpool
not lvchange --cachepolicy mq $vg/noncache
not lvchange --cachesettings foo=bar $vg/noncache

5
test/shell/lvchange-thin.sh
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@ -54,8 +54,9 @@ lvchange -r auto $vg/$lv1
lvchange --yes -M y --minor 234 --major 253 $vg/$lv1
lvchange -M n $vg/$lv1
lvchange --yes -M y --minor 235 --major 253 $vg/pool
lvchange -M n $vg/pool
# cannot change major minor for pools
not lvchange --yes -M y --minor 235 --major 253 $vg/pool
not lvchange -M n $vg/pool
# addtag_ARG
lvchange --addtag foo $vg/$lv1

5
tools/lvchange.c
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@ -966,6 +966,11 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
return ECMD_FAILED;
}
if (arg_count(cmd, persistent_ARG) && lv_is_pool(lv)) {
log_error("Persistent major and minor numbers are not supported with pools.");
return ECMD_FAILED;
}
/*
* FIXME: DEFAULT_BACKGROUND_POLLING should be "unspecified".
* If --poll is explicitly provided use it; otherwise polling