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e60e158eff
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John Gallagher e60e158eff Add subcommand to wait for background zfs activity to complete 
Currently the best way to wait for the completion of a long-running
operation in a pool, like a scrub or device removal, is to poll 'zpool
status' and parse its output, which is neither efficient nor convenient.

This change adds a 'wait' subcommand to the zpool command. When invoked,
'zpool wait' will block until a specified type of background activity
completes. Currently, this subcommand can wait for any of the following:

 - Scrubs or resilvers to complete
 - Devices to initialized
 - Devices to be replaced
 - Devices to be removed
 - Checkpoints to be discarded
 - Background freeing to complete

For example, a scrub that is in progress could be waited for by running

    zpool wait -t scrub <pool>

This also adds a -w flag to the attach, checkpoint, initialize, replace,
remove, and scrub subcommands. When used, this flag makes the operations
kicked off by these subcommands synchronous instead of asynchronous.

This functionality is implemented using a new ioctl. The type of
activity to wait for is provided as input to the ioctl, and the ioctl
blocks until all activity of that type has completed. An ioctl was used
over other methods of kernel-userspace communiction primarily for the
sake of portability.

Porting Notes:
This is ported from Delphix OS change DLPX-44432. The following changes
were made while porting:

 - Added ZoL-style ioctl input declaration.
 - Reorganized error handling in zpool_initialize in libzfs to integrate
   better with changes made for TRIM support.
 - Fixed check for whether a checkpoint discard is in progress.
   Previously it also waited if the pool had a checkpoint, instead of
   just if a checkpoint was being discarded.
 - Exposed zfs_initialize_chunk_size as a ZoL-style tunable.
 - Updated more existing tests to make use of new 'zpool wait'
   functionality, tests that don't exist in Delphix OS.
 - Used existing ZoL tunable zfs_scan_suspend_progress, together with
   zinject, in place of a new tunable zfs_scan_max_blks_per_txg.
 - Added support for a non-integral interval argument to zpool wait.

Future work:
ZoL has support for trimming devices, which Delphix OS does not. In the
future, 'zpool wait' could be extended to add the ability to wait for
trim operations to complete.

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: John Gallagher <john.gallagher@delphix.com>
Closes #9162
2019-09-13 18:09:06 -07:00
..
aggsum.c OpenZFS 9688 - aggsum_fini leaks memory 2018-10-19 12:08:03 -07:00
arc.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
blkptr.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
bplist.c Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bpobj.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
bptree.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
bqueue.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
cityhash.c OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
dataset_kstats.c Fix panic on DilOS with kstat per dataset statistics 2019-09-03 12:12:31 -07:00
dbuf_stats.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dbuf.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
ddt_zap.c fat zap should prefetch when iterating 2019-06-12 13:13:09 -07:00
ddt.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dmu_diff.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
dmu_object.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dmu_objset.c Enable compiler to typecheck logging 2019-09-12 13:28:26 -07:00
dmu_recv.c Enable compiler to typecheck logging 2019-09-12 13:28:26 -07:00
dmu_redact.c Move objnode handling to common code 2019-09-12 13:31:09 -07:00
dmu_send.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dmu_traverse.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dmu_tx.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
dmu_zfetch.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dmu.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
dnode_sync.c Decrease contention on dn_struct_rwlock 2019-07-08 13:18:50 -07:00
dnode.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
dsl_bookmark.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
dsl_crypt.c Enable SIMD for encryption 2019-09-10 10:45:46 -07:00
dsl_dataset.c Enable compiler to typecheck logging 2019-09-12 13:28:26 -07:00
dsl_deadlist.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dsl_deleg.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_destroy.c Enable compiler to typecheck logging 2019-09-12 13:28:26 -07:00
dsl_dir.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
dsl_pool.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
dsl_prop.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_scan.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
dsl_synctask.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
dsl_userhold.c Enable compiler to typecheck logging 2019-09-12 13:28:26 -07:00
edonr_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
fm.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
gzip.c OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
hkdf.c Encryption patch follow-up 2017-10-11 16:54:48 -04:00
lz4.c Reword comment in lz4_compress_zfs 2019-05-02 16:46:04 -07:00
lzjb.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
Makefile.in OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
metaslab.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
mmp.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
multilist.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
objlist.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.c Disable unused pathname::pn_path* (unneeded in Linux) 2019-07-15 13:57:56 -07:00
range_tree.c Metaslab max_size should be persisted while unloaded 2019-08-05 14:34:27 -07:00
refcount.c Prevent race in blkptr_verify against device removal 2019-08-13 21:24:43 -06:00
rrwlock.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
sa.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
sha256.c OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
skein_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
spa_boot.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_checkpoint.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
spa_config.c Fix /etc/hostid on root pool deadlock 2019-09-10 13:42:30 -07:00
spa_errlog.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
spa_history.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
spa_log_spacemap.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
spa_misc.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
spa.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
space_map.c Log Spacemap Project 2019-07-16 10:11:49 -07:00
space_reftree.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
THIRDPARTYLICENSE.cityhash OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
THIRDPARTYLICENSE.cityhash.descrip OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
txg.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
uberblock.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
unique.c Performance optimization of AVL tree comparator functions 2016-08-31 14:35:34 -07:00
vdev_cache.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
vdev_indirect_births.c Fixes: #8934 Large kmem_alloc 2019-07-10 15:54:49 -07:00
vdev_indirect_mapping.c Get rid of space_map_update() for ms_synced_length 2019-02-12 10:38:11 -08:00
vdev_indirect.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
vdev_initialize.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
vdev_label.c panic in removal_remap test on 4K devices 2019-06-13 13:12:39 -07:00
vdev_mirror.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
vdev_missing.c Update vdev_ops_t from illumos 2019-06-20 18:29:02 -07:00
vdev_queue.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
vdev_raidz_math_aarch64_neon_common.h OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
vdev_raidz_math_aarch64_neon.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_aarch64_neonx2.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx2.c OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
vdev_raidz_math_avx512bw.c OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
vdev_raidz_math_avx512f.c OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
vdev_raidz_math_impl.h codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math_scalar.c Linux 5.3: Fix switch() fall though compiler errors 2019-08-21 09:29:23 -07:00
vdev_raidz_math_sse2.c OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
vdev_raidz_math_ssse3.c OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
vdev_raidz_math.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
vdev_raidz.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
vdev_removal.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
vdev_root.c Update vdev_ops_t from illumos 2019-06-20 18:29:02 -07:00
vdev_trim.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
vdev.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
zap_leaf.c Off-by-one in zap_leaf_array_create() 2019-01-18 09:58:46 -08:00
zap_micro.c fat zap should prefetch when iterating 2019-06-12 13:13:09 -07:00
zap.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
zcp_get.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zcp_synctask.c OpenZFS 9166 - zfs storage pool checkpoint 2018-06-26 10:07:42 -07:00
zcp.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
zfeature.c Consistently captialize GUID for features 2019-04-16 10:01:51 -07:00
zfs_byteswap.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zfs_fm.c Add zpool status -s (slow I/Os) and -p (parseable) 2018-11-08 16:47:24 -08:00
zfs_fuid.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ioctl.c Add subcommand to wait for background zfs activity to complete 2019-09-13 18:09:06 -07:00
zfs_log.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
zfs_onexit.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ratelimit.c Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_replay.c Fix zil replay panic when TX_REMOVE followed by TX_CREATE 2019-08-28 10:42:02 -07:00
zfs_rlock.c OpenZFS 9689 - zfs range lock code should not be zpl-specific 2018-10-11 10:19:33 -07:00
zfs_sa.c Project Quota on ZFS 2018-02-13 14:54:54 -08:00
zil.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
zio_checksum.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zio_compress.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zio_inject.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zio.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
zle.c Fix zle_decompress out of bound access 2018-02-09 10:08:05 -08:00
zrlock.c OpenZFS restructuring - move linux tracing code to platform directories 2019-09-11 14:25:53 -07:00
zthr.c Fast Clone Deletion 2019-07-26 10:54:14 -07:00
zvol.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00