Prevent user accounting on readonly pool
Trying to mount a dataset from a readonly pool could inadvertently start the user accounting upgrade task, leading to the following failure: VERIFY3(tx->tx_threads == 2) failed (0 == 2) PANIC at txg.c:680:txg_wait_synced() Showing stack for process 2541 CPU: 2 PID: 2541 Comm: z_upgrade Tainted: P O 3.16.0-4-amd64 #1 Debian 3.16.51-3 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: [<0>] ? dump_stack+0x5d/0x78 [<0>] ? spl_panic+0xc9/0x110 [spl] [<0>] ? dnode_next_offset+0x1d4/0x2c0 [zfs] [<0>] ? dmu_object_next+0x77/0x130 [zfs] [<0>] ? dnode_rele_and_unlock+0x4d/0x120 [zfs] [<0>] ? txg_wait_synced+0x91/0x220 [zfs] [<0>] ? dmu_objset_id_quota_upgrade_cb+0x10f/0x140 [zfs] [<0>] ? dmu_objset_upgrade_task_cb+0xe3/0x170 [zfs] [<0>] ? taskq_thread+0x2cc/0x5d0 [spl] [<0>] ? wake_up_state+0x10/0x10 [<0>] ? taskq_thread_should_stop.part.3+0x70/0x70 [spl] [<0>] ? kthread+0xbd/0xe0 [<0>] ? kthread_create_on_node+0x180/0x180 [<0>] ? ret_from_fork+0x58/0x90 [<0>] ? kthread_create_on_node+0x180/0x180 This patch updates both functions responsible for checking if we can perform user accounting to verify the pool is not readonly. Reviewed-by: Alek Pinchuk <apinchuk@datto.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: loli10K <ezomori.nozomu@gmail.com> Closes #8424
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@ -2433,7 +2433,8 @@ dmu_objset_userobjspace_upgradable(objset_t *os)
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return (dmu_objset_type(os) == DMU_OST_ZFS &&
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!dmu_objset_is_snapshot(os) &&
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dmu_objset_userobjused_enabled(os) &&
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!dmu_objset_userobjspace_present(os));
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!dmu_objset_userobjspace_present(os) &&
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spa_writeable(dmu_objset_spa(os)));
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}
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boolean_t
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@ -2442,7 +2443,8 @@ dmu_objset_projectquota_upgradable(objset_t *os)
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return (dmu_objset_type(os) == DMU_OST_ZFS &&
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!dmu_objset_is_snapshot(os) &&
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dmu_objset_projectquota_enabled(os) &&
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!dmu_objset_projectquota_present(os));
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!dmu_objset_projectquota_present(os) &&
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spa_writeable(dmu_objset_spa(os)));
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}
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void
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@ -841,7 +841,8 @@ tests = ['truncate_001_pos', 'truncate_002_pos', 'truncate_timestamps']
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tags = ['functional', 'truncate']
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[tests/functional/upgrade]
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tests = ['upgrade_userobj_001_pos', 'upgrade_projectquota_001_pos']
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tests = ['upgrade_userobj_001_pos', 'upgrade_projectquota_001_pos',
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'upgrade_readonly_pool']
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tags = ['functional', 'upgrade']
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[tests/functional/user_namespace]
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@ -3,7 +3,8 @@ dist_pkgdata_SCRIPTS = \
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setup.ksh \
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cleanup.ksh \
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upgrade_userobj_001_pos.ksh \
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upgrade_projectquota_001_pos.ksh
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upgrade_projectquota_001_pos.ksh \
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upgrade_readonly_pool.ksh
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dist_pkgdata_DATA = \
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upgrade_common.kshlib
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66
tests/zfs-tests/tests/functional/upgrade/upgrade_readonly_pool.ksh
Executable file
66
tests/zfs-tests/tests/functional/upgrade/upgrade_readonly_pool.ksh
Executable file
@ -0,0 +1,66 @@
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#!/bin/ksh -p
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#
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# This file and its contents are supplied under the terms of the
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# Common Development and Distribution License ("CDDL"), version 1.0.
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# You may only use this file in accordance with the terms of version
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# 1.0 of the CDDL.
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#
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# A full copy of the text of the CDDL should have accompanied this
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# source. A copy of the CDDL is also available via the Internet at
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# http://www.illumos.org/license/CDDL.
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#
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#
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# Copyright 2019, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
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#
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. $STF_SUITE/tests/functional/upgrade/upgrade_common.kshlib
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#
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# DESCRIPTION:
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# User accounting upgrade should not be executed on readonly pool
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#
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# STRATEGY:
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# 1. Create a pool with the feature@userobj_accounting disabled to simulate
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# a legacy pool from a previous ZFS version.
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# 2. Create a file on the "legecy" dataset and store its checksum
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# 3. Enable feature@userobj_accounting on the pool and verify it is only
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# "enabled" and not "active": upgrading starts when the filesystem is mounted
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# 4. Export the pool and re-import is readonly, without mounting any filesystem
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# 5. Try to mount the root dataset manually without the "ro" option, then verify
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# filesystem status and the pool feature status (not "active") to ensure the
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# pool "readonly" status is enforced.
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#
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verify_runnable "global"
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TESTFILE="$TESTDIR/file.bin"
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log_assert "User accounting upgrade should not be executed on readonly pool"
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log_onexit cleanup_upgrade
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# 1. Create a pool with the feature@userobj_accounting disabled to simulate
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# a legacy pool from a previous ZFS version.
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log_must zpool create -d -m $TESTDIR $TESTPOOL $TMPDEV
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# 2. Create a file on the "legecy" dataset
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log_must touch $TESTDIR/file.bin
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# 3. Enable feature@userobj_accounting on the pool and verify it is only
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# "enabled" and not "active": upgrading starts when the filesystem is mounted
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log_must zpool set feature@userobj_accounting=enabled $TESTPOOL
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log_must test "enabled" == "$(get_pool_prop 'feature@userobj_accounting' $TESTPOOL)"
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# 4. Export the pool and re-import is readonly, without mounting any filesystem
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log_must zpool export $TESTPOOL
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log_must zpool import -o readonly=on -N -d "$(dirname $TMPDEV)" $TESTPOOL
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# 5. Try to mount the root dataset manually without the "ro" option, then verify
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# filesystem status and the pool feature status (not "active") to ensure the
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# pool "readonly" status is enforced.
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log_must mount -t zfs -o zfsutil $TESTPOOL $TESTDIR
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log_must stat "$TESTFILE"
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log_mustnot touch "$TESTFILE"
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log_must test "enabled" == "$(get_pool_prop 'feature@userobj_accounting' $TESTPOOL)"
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log_pass "User accounting upgrade is not executed on readonly pool"
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