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zpool: fix redundancy check after vdev removal

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The presence of indirect vdevs was confusing get_redundancy(), which
considered a pool with e.g. only mirror top-level vdevs and at least
one indirect vdev (due to the removal of a previous vdev) as already
having a broken redundancy, which is not the case. This lead to the
possibility of compromising the redundancy of a pool by adding
mismatched vdevs without requiring the use of `-f`, and with no
visible notice or warning.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Stéphane Lesimple <speed47_github@speed47.net>
Closes #13705
Closes #13711
This commit is contained in:
Stéphane Lesimple 2022-08-05 03:02:57 +03:00 committed by GitHub
parent c26045b435
commit 4fc1ea9c6c
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3 changed files with 66 additions and 3 deletions
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9
cmd/zpool/zpool_vdev.c
View File

@ -514,9 +514,14 @@ get_replication(nvlist_t *nvroot, boolean_t fatal)
if (is_log)
continue;
/* Ignore holes introduced by removing aux devices */
/*
* Ignore holes introduced by removing aux devices, along
* with indirect vdevs introduced by previously removed
* vdevs.
*/
verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
if (strcmp(type, VDEV_TYPE_HOLE) == 0)
if (strcmp(type, VDEV_TYPE_HOLE) == 0 ||
strcmp(type, VDEV_TYPE_INDIRECT) == 0)
continue;
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,

57
tests/zfs-tests/tests/functional/removal/removal_with_indirect.ksh Executable file
View File

@ -0,0 +1,57 @@
#! /bin/ksh -p
#
# CDDL HEADER START
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source. A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#
# CDDL HEADER END
#
#
# Copyright (c) 2014, 2018 by Delphix. All rights reserved.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/removal/removal.kshlib
TMPDIR=${TMPDIR:-$TEST_BASE_DIR}
DISK1="$TMPDIR/dsk1"
DISK2="$TMPDIR/dsk2"
DISK3="$TMPDIR/dsk3"
DISK4="$TMPDIR/dsk4"
DISKS="$DISK1 $DISK2 $DISK3 $DISK4"
log_must mkfile $(($MINVDEVSIZE * 2)) $DISK1
log_must mkfile $(($MINVDEVSIZE * 2)) $DISK2
log_must mkfile $(($MINVDEVSIZE * 2)) $DISK3
log_must mkfile $(($MINVDEVSIZE * 2)) $DISK4
function cleanup
{
default_cleanup_noexit
log_must rm -f $DISKS
}
# Build a zpool with 2 mirror vdevs
log_must default_setup_noexit "mirror $DISK1 $DISK2 mirror $DISK3 $DISK4"
log_onexit cleanup
# Remove one of the mirrors
log_must zpool remove $TESTPOOL mirror-1
log_must wait_for_removal $TESTPOOL
# Attempt to add a single-device vdev, shouldn't work
log_mustnot zpool add $TESTPOOL $DISK3
# Force it, should work
log_must zpool add -f $TESTPOOL $DISK3
log_pass "Prevented from adding a non-mirror vdev on a mirrored zpool w/ indirect vdevs"

3
tests/zfs-tests/tests/functional/removal/remove_mirror.ksh
View File

@ -49,7 +49,8 @@ log_mustnot zpool remove $TESTPOOL $DISK2
log_must wait_for_removal $TESTPOOL
# Add back the first disk.
log_must zpool add $TESTPOOL $DISK1
# We use -f as we're adding a single vdev to zpool with only mirrors.
log_must zpool add -f $TESTPOOL $DISK1
# Now attempt to remove the mirror.
log_must zpool remove $TESTPOOL mirror-1