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* Change http://zfsonlinux.org links to https://zfsonlinux.orgBrian Behlendorf2020-01-131-5/+6
| | | | | | | | | | | Update the project website links contained in to repository to reference the secure https://zfsonlinux.org address. Reviewed-By: Richard Laager <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Garrett Fields <[email protected]> Reviewed-by: Kjeld Schouten <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #9837
* Fix "zpool add -n" for dedup, special and log devicesloli10K2020-01-061-14/+29
| | | | | | | | | | | | | | | | | | | | For dedup, special and log devices "zpool add -n" does not print correctly their vdev type: ~# zpool add -n pool dedup /tmp/dedup special /tmp/special log /tmp/log would update 'pool' to the following configuration: pool /tmp/normal /tmp/dedup /tmp/special /tmp/log This could lead storage administrators to modify their ZFS pools to unexpected and unintended vdev configurations. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #9783 Closes #9390
* Colorize zpool status outputTony Hutter2019-12-191-136/+258
| | | | | | | | | | | | | | | | | | | If the ZFS_COLOR env variable is set, then use ANSI color output in zpool status: - Column headers are bold - Degraded or offline pools/vdevs are yellow - Non-zero error counters and faulted vdevs/pools are red - The 'status:' and 'action:' sections are yellow if they're displaying a warning. This also includes a new 'faketty' function in libtest.shlib that is compatible with FreeBSD (code provided by @freqlabs). Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Signed-off-by: Tony Hutter <[email protected]> Closes #9340
* Add wrapper for Linux BLKFLSBUF ioctlMatthew Macy2019-10-281-1/+1
| | | | | | | | | | FreeBSD has no analog. Buffered block devices were removed a decade plus ago. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9508
* Fix zpool history unbounded memory usageChunwei Chen2019-10-281-16/+28
| | | | | | | | | | | | In original implementation, zpool history will read the whole history before printing anything, causing memory usage goes unbounded. We fix this by breaking it into read-print iterations. Reviewed-by: Tom Caputi <[email protected]> Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Closes #9516
* OpenZFS restructuring - libsplMatthew Macy2019-10-023-6/+1
| | | | | | | | | Factor Linux specific pieces out of libspl. Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Sean Eric Fagan <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9336
* OpenZFS restructuring - zpoolMatthew Macy2019-09-306-352/+428
| | | | | | | | | | | Factor Linux specific functions out of the zpool command. Reviewed-by: Allan Jude <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Sean Eric Fagan <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: loli10K <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9333
* Use signed types to prevent subtraction overflowRyan Moeller2019-09-221-4/+4
| | | | | | | | | | | | | | | | | | The difference between the sizes could be positive or negative. Leaving the types as unsigned means the result overflows when the difference is negative and removing the labs() means we'll have introduced a bug. The subtraction results in the correct value when the unsigned integer is interpreted as a signed integer by labs(). Clang doesn't see that we're doing a subtraction and abusing the types. It sees the result of the subtraction, an unsigned value, being passed to an absolute value function and emits a warning which we treat as an error. Reviewed by: Youzhong Yang <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes #9355
* Refactor libzfs_error_init newlinesRyan Moeller2019-09-181-1/+1
| | | | | | | | | Move the trailing newlines from the error message strings to the format strings to more closely match the other error messages. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes #9330
* Add subcommand to wait for background zfs activity to completeJohn Gallagher2019-09-131-42/+517
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <[email protected]> Reviewed-by: John Kennedy <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: John Gallagher <[email protected]> Closes #9162
* Fix zpool subcommands error message with some unsupported optionsloli10K2019-09-041-4/+2
| | | | | | | | | | | | | | | | | Both 'detach' and 'online' zpool subcommands, when provided with an unsupported option, forget to print it in the error message: # zpool online -t rpool vda3 invalid option '' usage: online [-e] <pool> <device> ... This changes fixes the error message in order to include the actual option that is not supported. Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #9270
* Fix typos in cmd/Andrea Gelmini2019-08-301-2/+2
| | | | | | | Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Richard Laager <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Andrea Gelmini <[email protected]> Closes #9234
* Fix memory leak in check_disk()Michael Niewöhner2019-06-191-0/+1
| | | | | | | | Reviewed-by: Allan Jude <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Richard Elling <[email protected]> Signed-off-by: Michael Niewöhner <[email protected]> Closes #8897 Closes #8911
* Update comments to match codeRyan Moeller2019-05-281-6/+6
| | | | | | | | | | | | s/get_vdev_spec/make_root_vdev The former doesn't exist anymore. Sponsored by: iXsystems, Inc. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Tom Caputi <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes #8759
* Endless loop in zpool_do_remove() on platforms with unsigned charloli10K2019-05-281-1/+1
| | | | | | | | | | | | On systems where "char" is an unsigned type the value returned by getopt() will never be negative (-1), leading to an endless loop: this issue prevents both 'zpool remove' and 'zstreamdump' for working on some systems. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Chris Dunlop <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #8789
* zpool: status -t is not documented in help messageloli10K2019-05-241-1/+1
| | | | | | | | | This commit adds the undocumented "-t" option to zpool(8) help message. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Chris Dunlop <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #8782
* zpool: trim -p is not a valid optionloli10K2019-05-241-1/+2
| | | | | | | | | | This commit removes the documented but not handled "-p" option from zpool(8) help message. Reviewed-by: George Melikov <[email protected]> Reviewed-by: Chris Dunlop <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #8781
* Fix typesetting of Errata #4JMoVS2019-05-081-23/+22
| | | | | | | | Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Richard Laager <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Justin Scholz <[email protected]> Closes #8712 Closes #8721
* Clearer wording on Errata #4JMoVS2019-05-021-21/+26
| | | | | | | | | | | | | | Users of existing pools, especially pools with top-level encrypted datasets, could run into trouble trying to work around Errata #4. Clarify that removing encrypted snapshots and bookmarks is enough to clear the errata. Reviewed-by: George Melikov <[email protected]> Reviewed-by: Richard Laager <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Tom Caputi <[email protected]> Signed-off-by: Justin Scholz <[email protected]> Closes #8682 Closes #8683
* Fix estimated scrub completion timeTom Caputi2019-05-011-2/+3
| | | | | | | | | | | | | | | | | | | Currently, it is possible for the 'zpool scrub' command to progress slightly beyond 100% due to concurrent changes happening on the live pool. This behavior is expected, but the userspace code for 'zpool status' would subtract the expected amount of data from the amount of data already scrubbed, resulting in a negative integer being casted to a large positive one. This number was then used to calculate the estimated completion time, resulting in wildly wrong results. This code changes the behavior so that 'zpool status' does not attempt to report an estimate during this period. Reviewed by: Brian Behlendorf <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #8611 Closes #8687
* Add option [-V|--version] to emit version stringTerraTech2019-04-161-1/+26
| | | | | | | | | | | | | | | | | | | | | Add the 'zfs version' and 'zpool version' subcommands to display the version of the user space utilities and loaded zfs kernel module. For example: $ zfs version zfs-0.8.0-rc3_169_g67e0366b88 zfs-kmod-0.8.0-rc3_169_g67e0366b88 The '-V' and '--version' aliases were added to support the common convention of using 'zfs --version` to obtain the version information. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: Richard Laager <[email protected]> Signed-off-by: TerraTech <[email protected]> Closes #2501 Closes #8567
* Add TRIM supportBrian Behlendorf2019-03-291-70/+280
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | UNMAP/TRIM support is a frequently-requested feature to help prevent performance from degrading on SSDs and on various other SAN-like storage back-ends. By issuing UNMAP/TRIM commands for sectors which are no longer allocated the underlying device can often more efficiently manage itself. This TRIM implementation is modeled on the `zpool initialize` feature which writes a pattern to all unallocated space in the pool. The new `zpool trim` command uses the same vdev_xlate() code to calculate what sectors are unallocated, the same per- vdev TRIM thread model and locking, and the same basic CLI for a consistent user experience. The core difference is that instead of writing a pattern it will issue UNMAP/TRIM commands for those extents. The zio pipeline was updated to accommodate this by adding a new ZIO_TYPE_TRIM type and associated spa taskq. This new type makes is straight forward to add the platform specific TRIM/UNMAP calls to vdev_disk.c and vdev_file.c. These new ZIO_TYPE_TRIM zios are handled largely the same way as ZIO_TYPE_READs or ZIO_TYPE_WRITEs. This makes it possible to largely avoid changing the pipieline, one exception is that TRIM zio's may exceed the 16M block size limit since they contain no data. In addition to the manual `zpool trim` command, a background automatic TRIM was added and is controlled by the 'autotrim' property. It relies on the exact same infrastructure as the manual TRIM. However, instead of relying on the extents in a metaslab's ms_allocatable range tree, a ms_trim tree is kept per metaslab. When 'autotrim=on', ranges added back to the ms_allocatable tree are also added to the ms_free tree. The ms_free tree is then periodically consumed by an autotrim thread which systematically walks a top level vdev's metaslabs. Since the automatic TRIM will skip ranges it considers too small there is value in occasionally running a full `zpool trim`. This may occur when the freed blocks are small and not enough time was allowed to aggregate them. An automatic TRIM and a manual `zpool trim` may be run concurrently, in which case the automatic TRIM will yield to the manual TRIM. Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Tim Chase <[email protected]> Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: George Wilson <[email protected]> Reviewed-by: Serapheim Dimitropoulos <[email protected]> Contributions-by: Saso Kiselkov <[email protected]> Contributions-by: Tim Chase <[email protected]> Contributions-by: Chunwei Chen <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #8419 Closes #598
* Improve `zpool labelclear`Brian Behlendorf2019-03-211-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) As implemented the `zpool labelclear` command overwrites the calculated offsets of all four vdev labels even when only a single valid label is found. If the device as been re-purposed but still contains a valid label this can result in space no longer owned by ZFS being zeroed. Prevent this by verifying every label removed is intact before it's overwritten. 2) Address a small bug in zpool_do_labelclear() which prevented labelclear from working on file vdevs. Only block devices support BLKFLSBUF, try the ioctl() but when it's reported as unsupported this should not be fatal. 3) Fix `zpool labelclear` so it can be run on vdevs which were removed from the pool with `zpool remove`. Additionally, allow intact but partial labels to be cleared as in the case of a failed `zpool attach` or `zpool replace`. 4) Remove LABELCLEAR and LABELREAD variables for test cases. Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Tim Chase <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #8500 Closes #8373 Closes #6261
* Better user experience for errata 4Tom Caputi2019-03-141-11/+15
| | | | | | | | | | | | | | | | | | | | This patch attempts to address some user concerns that have arisen since errata 4 was introduced. * The errata warning has been made less scary for users without any encrypted datasets. * The errata warning now clears itself without a pool reimport if the bookmark_v2 feature is enabled and no encrypted datasets exist. * It is no longer possible to create new encrypted datasets without enabling the bookmark_v2 feature, thus helping to ensure that the errata is resolved. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Issue ##8308 Closes #8504
* Detect and prevent mixed raw and non-raw sendsTom Caputi2019-03-131-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, there is an issue in the raw receive code where raw receives are allowed to happen on top of previously non-raw received datasets. This is a problem because the source-side dataset doesn't know about how the blocks on the destination were encrypted. As a result, any MAC in the objset's checksum-of-MACs tree that is a parent of both blocks encrypted on the source and blocks encrypted by the destination will be incorrect. This will result in authentication errors when we decrypt the dataset. This patch fixes this issue by adding a new check to the raw receive code. The code now maintains an "IVset guid", which acts as an identifier for the set of IVs used to encrypt a given snapshot. When a snapshot is raw received, the destination snapshot will take this value from the DRR_BEGIN payload. Non-raw receives and normal "zfs snap" operations will cause ZFS to generate a new IVset guid. When a raw incremental stream is received, ZFS will check that the "from" IVset guid in the stream matches that of the "from" destination snapshot. If they do not match, the code will error out the receive, preventing the problem. This patch requires an on-disk format change to add the IVset guids to snapshots and bookmarks. As a result, this patch has errata handling and a tunable to help affected users resolve the issue with as little interruption as possible. Reviewed-by: Paul Dagnelie <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Matt Ahrens <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #8308
* shellcheck passbunder20152019-02-041-3/+3
| | | | | | | | | | note: which is non-standard. Use builtin 'command -v' instead. [SC2230] note: Use -n instead of ! -z. [SC2236] Reviewed-by: George Melikov <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: bunder2015 <[email protected]> Closes #8367
* Fix zpool iostat -w header namesTony Hutter2019-01-311-2/+2
| | | | | | | | | | | The zpool iostat latency histograms (-w) has column names 'sync_queue' and 'async_queue', which do not match the man page, nor the equivalent columns in average latency. Change the column names to be 'syncq_wait' and 'asyncq_wait' to be consistent. Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tony Hutter <[email protected]> Closes #8338
* zpool iostat should print headers when terminal fillsDamian Wojsław2019-01-231-4/+32
| | | | | | | | | | | | | | | | When `zpool iostat` fills the terminal the headers should be printed again. `zpool iostat -n` can be used to suppress this. If the command is not attached to a tty, headers will not be printed so as to not break existing scripts. Reviewed-by: Joshua M. Clulow <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Damian Wojsław <[email protected]> Closes #8235 Closes #8262
* Add 'zpool status -i' optionBrian Behlendorf2019-01-071-38/+57
| | | | | | | | | | | | | | | | | | | | | Only display the full details of the vdev initialization state in 'zpool status' output when requested with the -i option. By default display '(initializing)' after vdevs when they are being actively initialized. This is consistent with the established precident of appending '(resilvering), etc' and fits within the default 80 column terminal width making it easy to read. Additionally, updated the 'zpool initialize' documentation to make it clear the options are mutually exclusive, but allow duplicate options like all other zfs/zpool commands. Reviewed by: Matt Ahrens <[email protected]> Reviewed-by: loli10K <[email protected]> Reviewed-by: Tim Chase <[email protected]> Reviewed-by: George Wilson <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #8230
* OpenZFS 9102 - zfs should be able to initialize storage devicesGeorge Wilson2019-01-071-0/+154
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PROBLEM ======== The first access to a block incurs a performance penalty on some platforms (e.g. AWS's EBS, VMware VMDKs). Therefore we recommend that volumes are "thick provisioned", where supported by the platform (VMware). This can create a large delay in getting a new virtual machines up and running (or adding storage to an existing Engine). If the thick provision step is omitted, write performance will be suboptimal until all blocks on the LUN have been written. SOLUTION ========= This feature introduces a way to 'initialize' the disks at install or in the background to make sure we don't incur this first read penalty. When an entire LUN is added to ZFS, we make all space available immediately, and allow ZFS to find unallocated space and zero it out. This works with concurrent writes to arbitrary offsets, ensuring that we don't zero out something that has been (or is in the middle of being) written. This scheme can also be applied to existing pools (affecting only free regions on the vdev). Detailed design: - new subcommand:zpool initialize [-cs] <pool> [<vdev> ...] - start, suspend, or cancel initialization - Creates new open-context thread for each vdev - Thread iterates through all metaslabs in this vdev - Each metaslab: - select a metaslab - load the metaslab - mark the metaslab as being zeroed - walk all free ranges within that metaslab and translate them to ranges on the leaf vdev - issue a "zeroing" I/O on the leaf vdev that corresponds to a free range on the metaslab we're working on - continue until all free ranges for this metaslab have been "zeroed" - reset/unmark the metaslab being zeroed - if more metaslabs exist, then repeat above tasks. - if no more metaslabs, then we're done. - progress for the initialization is stored on-disk in the vdev’s leaf zap object. The following information is stored: - the last offset that has been initialized - the state of the initialization process (i.e. active, suspended, or canceled) - the start time for the initialization - progress is reported via the zpool status command and shows information for each of the vdevs that are initializing Porting notes: - Added zfs_initialize_value module parameter to set the pattern written by "zpool initialize". - Added zfs_vdev_{initializing,removal}_{min,max}_active module options. Authored by: George Wilson <[email protected]> Reviewed by: John Wren Kennedy <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Pavel Zakharov <[email protected]> Reviewed by: Prakash Surya <[email protected]> Reviewed by: loli10K <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Richard Lowe <[email protected]> Signed-off-by: Tim Chase <[email protected]> Ported-by: Tim Chase <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9102 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c3963210eb Closes #8230
* Fix 'zpool list -v' alignmentBrian Behlendorf2018-12-041-52/+105
| | | | | | | | | | | | | | | The verbose output of 'zpool list' was not correctly aligned due to differences in the vdev name lengths. Minimally update the code the correct the alignment using the same strategy employed by 'zpool status'. Missing dashes were added for the empty defaults columns, and the vdev state is now printed for all vdevs. Reviewed-by: Tom Caputi <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #7308 Closes #8147
* zpool: allow split with whole-disk devicesLOLi2018-11-201-1/+1
| | | | | | | | | | This change allows 'zpool split' to work with whole-disk devices and updates the ZFS Test Suite with a new script to exercise this functionality. Reviewed by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #6643 Closes #8133
* Add zpool status -s (slow I/Os) and -p (parseable)Tony Hutter2018-11-081-8/+45
| | | | | | | | | | | | | | | | | | This patch adds a new slow I/Os (-s) column to zpool status to show the number of VDEV slow I/Os. This is the number of I/Os that didn't complete in zio_slow_io_ms milliseconds. It also adds a new parsable (-p) flag to display exact values. NAME STATE READ WRITE CKSUM SLOW testpool ONLINE 0 0 0 - mirror-0 ONLINE 0 0 0 - loop0 ONLINE 0 0 0 20 loop1 ONLINE 0 0 0 0 Reviewed-by: Brian Behlendorf <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Signed-off-by: Tony Hutter <[email protected]> Closes #7756 Closes #6885
* Add libzutil for libzfs or libzpool consumersDon Brady2018-11-053-4/+43
| | | | | | | | | | | Adds a libzutil for utility functions that are common to libzfs and libzpool consumers (most of what was in libzfs_import.c). This removes the need for utilities to link against both libzpool and libzfs. Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #8050
* Defer new resilvers until the current one endsTom Caputi2018-10-181-6/+52
| | | | | | | | | | | | | | | | | | | | | | | | | Currently, if a resilver is triggered for any reason while an existing one is running, zfs will immediately restart the existing resilver from the beginning to include the new drive. This causes problems for system administrators when a drive fails while another is already resilvering. In this case, the optimal thing to do to reduce risk of data loss is to wait for the current resilver to end before immediately replacing the second failed drive, which allows the system to operate with two incomplete drives for the minimum amount of time. This patch introduces the resilver_defer feature that essentially does this for the admin without forcing them to wait and monitor the resilver manually. The change requires an on-disk feature since we must mark drives that are part of a deferred resilver in the vdev config to ensure that we do not assume they are done resilvering when an existing resilver completes. Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: John Kennedy <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: @mmaybee Signed-off-by: Tom Caputi <[email protected]> Closes #7732
* zpool: allow sharing of spare device among poolsLOLi2018-10-171-2/+7
| | | | | | | | | | | ZFS allows, by default, sharing of spare devices among different pools; this commit simply restores this functionality for disk devices and adds an additional tests case to the ZFS Test Suite to prevent future regression. Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #7999
* Print "(repairing)" in zpool status againTony Hutter2018-10-091-2/+6
| | | | | | | | | | | | | | | | | | | | Historically, zpool status prints "(repairing)" for any drives that have errors during a scrub: NAME STATE READ WRITE CKSUM mypool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 /tmp/file1 ONLINE 13 0 0 (repairing) /tmp/file2 ONLINE 0 0 0 /tmp/file3 ONLINE 0 0 0 This was accidentally broken in "OpenZFS 9166 - zfs storage pool checkpoint" (d2734cc). This patch adds it back in. Reviewed-by: Serapheim Dimitropoulos <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tony Hutter <[email protected]> Closes #7779 Closes #7978
* Zpool iostat: remove latency/queue scalingGregor Kopka2018-09-251-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | Bandwidth and iops are average per second while *_wait are averages per request for latency or, for queue depths, an instantaneous measurement at the end of an interval (according to man zpool). When calculating the first two it makes sense to do x/interval_duration (x being the increase in total bytes or number of requests over the duration of the interval, interval_duration in seconds) to 'scale' from amount/interval_duration to amount/second. But applying the same math for the latter (*_wait latencies/queue) is wrong as there is no interval_duration component in the values (these are time/requests to get to average_time/request or already an absulute number). This bug leads to the only correct continuous *_wait figures for both latencies and queue depths from 'zpool iostat -l/q' being with duration=1 as then the wrong math cancels itself (x/1 is a nop). This removes temporal scaling from latency and queue depth figures. Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Gregor Kopka <[email protected]> Closes #7945 Closes #7694
* zpool should detect invalid fs property on createLOLi2018-09-131-4/+11
| | | | | | | | | | | This change improve the handling of invalid filesystem properties when specified at pool creation: this is useful when 'zpool create -n' (dry run) is executed to detect invalid fs-level options (-O) before the actual command is run. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #7620 Closes #7878
* Pool allocation classesDon Brady2018-09-052-91/+307
| | | | | | | | | | | | | | | | | | | | Allocation Classes add the ability to have allocation classes in a pool that are dedicated to serving specific block categories, such as DDT data, metadata, and small file blocks. A pool can opt-in to this feature by adding a 'special' or 'dedup' top-level VDEV. Reviewed by: Pavel Zakharov <[email protected]> Reviewed-by: Richard Laager <[email protected]> Reviewed-by: Alek Pinchuk <[email protected]> Reviewed-by: Håkan Johansson <[email protected]> Reviewed-by: Andreas Dilger <[email protected]> Reviewed-by: DHE <[email protected]> Reviewed-by: Richard Elling <[email protected]> Reviewed-by: Gregor Kopka <[email protected]> Reviewed-by: Kash Pande <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Matthew Ahrens <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #5182
* Don't modify argv[] in user toolsDeHackEd2018-08-201-2/+16
| | | | | | | | | | | | argv[] gets modified during string parsing for input arguments. This is reflected in the live process listing. Don't do that. Reviewed-by: Serapheim Dimitropoulos <[email protected]> Reviewed-by: loli10K <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: DHE <[email protected]> Closes #7760
* OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operationsSerapheim Dimitropoulos2018-07-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = Motivation While dealing with another performance issue (see 126118f) we noticed that we spend a lot of time in various places in the kernel when constructing long nvlists. The problem is that when an nvlist is created with the NV_UNIQUE_NAME set (which is the case most of the time), we do a linear search through the whole list to ensure uniqueness for every entry we add. An example of the above scenario can be seen in the following flamegraph, where more than have the time of the zfsdev_ioctl() is spent on constructing nvlists. Flamegraph: https://sdimitro.github.io/img/flame/sdimitro_snap_unmount3.svg Adding a table to speed up lookups will help situations where we just construct an nvlist (like the scenario above), in addition to regular lookups and removals. = What this patch does In this diff we've implemented a hash-table on top of the nvlist code that converts most nvlist operations from O(# number of entries) to O(1)* (the start is for amortized time as the hash-table grows and shrinks depending on the # of entries - plain lookup is strictly O(1)). = Performance Analysis To analyze the performance improvement I just used the setup from the snapshot deletion issue mentioned above in the Motivation section. Basically I created 10K filesystems with one snapshot each and then I just used the API of libZFS_Core to pass down an nvlist of all the snapshots to have them deleted. The reason I used my own driver program was to have clean performance results of what actually happens in the kernel. The flamegraphs and wall clock times mentioned below were gathered from the start to the end of the driver program's run. Between trials the testpool used was completely destroyed, the system was rebooted and the testpool was completely recreated. The reason for this dance was to get consistent results. == Results (before patch): === Sampling Flamegraphs [Trial 1] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A.svg [Trial 2] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A2.svg [Trial 3] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A3.svg === Wall clock times (in seconds) ``` [Trial 4] real 5.3 user 0.4 sys 2.3 [Trial 5] real 8.2 user 0.4 sys 2.4 [Trial 6] real 6.0 user 0.5 sys 2.3 ``` == Results (after patch): === Sampling Flamegraphs [Trial 1] https://sdimitro.github.io/img/flame/DLPX-53417/trial-Ae.svg [Trial 2] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A2e.svg [Trial 3] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A3e.svg === Wall clock times (in seconds) ``` [Trial 4] real 4.9 user 0.0 sys 0.9 [Trial 5] real 3.8 user 0.0 sys 0.9 [Trial 6] real 3.6 user 0.0 sys 0.9 ``` == Analysis The results between the trials are consistent so in this sections I will only talk about the flamegraph results from trial-1 and the wall-clock results from trial-4. From trial-1 we can see that zfs_dev_ioctl() goes from 2,331 to 996 samples counts. Specifically, the samples from fnvlist_add_nvlist() and spa_history_log_nvl() are almost gone (~500 & ~800 to 5 & 5 samples), leaving zfs_ioc_destroy_snaps() to dominate most samples from zfs_dev_ioctl(). From trial-4 we see that the user time dropped to 0 secods. I believe the consistent 0.4 seconds before my patch was applied was due to my driver program constructing the long nvlist of snapshots so it can pass it to the kernel. As for the system time, the effect there is more clear (2.3 down to 0.9 seconds). Porting Notes: * DATA_TYPE_DONTCARE case added to switch in fm_nvprintr() and zpool_do_events_nvprint(). Authored by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Sebastien Roy <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9580 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/b5eca7b1 Closes #7748
* Default ashift for Amazon EC2 NVMe devicesTroels Nørgaard2018-07-061-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a default 4 KiB ashift for Amazon EC2 NVMe devices on instances with NVMe ephemeral devices, such as the types c5d, f1, i3 and m5d. As per the official documentation [1] a 4096 byte blocksize should be used to match the underlying hardware. The string was identified via: $ sudo sginfo -M /dev/nvme0n1 INQUIRY response (cmd: 0x12) ---------------------------- Device Type 0 Vendor: NVMe Product: Amazon EC2 NVMe Revision level: $ lsblk -io KNAME,TYPE,SIZE,MODEL KNAME TYPE SIZE MODEL nvme0n1 disk 442.4G Amazon EC2 NVMe Instance Storage [1] https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ storage-optimized-instances.html Retrived 2018-07-03 Reviewed-by: George Melikov <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Troels Nørgaard <[email protected]> Closes #7676
* Fix missing option '-e' in zpool online usageLow-power2018-06-261-1/+1
| | | | | | Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: WHR <[email protected]> Closes #7655
* OpenZFS 9166 - zfs storage pool checkpointSerapheim Dimitropoulos2018-06-261-8/+207
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Details about the motivation of this feature and its usage can be found in this blogpost: https://sdimitro.github.io/post/zpool-checkpoint/ A lightning talk of this feature can be found here: https://www.youtube.com/watch?v=fPQA8K40jAM Implementation details can be found in big block comment of spa_checkpoint.c Side-changes that are relevant to this commit but not explained elsewhere: * renames members of "struct metaslab trees to be shorter without losing meaning * space_map_{alloc,truncate}() accept a block size as a parameter. The reason is that in the current state all space maps that we allocate through the DMU use a global tunable (space_map_blksz) which defauls to 4KB. This is ok for metaslab space maps in terms of bandwirdth since they are scattered all over the disk. But for other space maps this default is probably not what we want. Examples are device removal's vdev_obsolete_sm or vdev_chedkpoint_sm from this review. Both of these have a 1:1 relationship with each vdev and could benefit from a bigger block size. Porting notes: * The part of dsl_scan_sync() which handles async destroys has been moved into the new dsl_process_async_destroys() function. * Remove "VERIFY(!(flags & FWRITE))" in "kernel.c" so zhack can write to block device backed pools. * ZTS: * Fix get_txg() in zpool_sync_001_pos due to "checkpoint_txg". * Don't use large dd block sizes on /dev/urandom under Linux in checkpoint_capacity. * Adopt Delphix-OS's setting of 4 (spa_asize_inflation = SPA_DVAS_PER_BP + 1) for the checkpoint_capacity test to speed its attempts to fill the pool * Create the base and nested pools with sync=disabled to speed up the "setup" phase. * Clear labels in test pool between checkpoint tests to avoid duplicate pool issues. * The import_rewind_device_replaced test has been marked as "known to fail" for the reasons listed in its DISCLAIMER. * New module parameters: zfs_spa_discard_memory_limit, zfs_remove_max_bytes_pause (not documented - debugging only) vdev_max_ms_count (formerly metaslabs_per_vdev) vdev_min_ms_count Authored by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: John Kennedy <[email protected]> Reviewed by: Dan Kimmel <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Richard Lowe <[email protected]> Ported-by: Tim Chase <[email protected]> Signed-off-by: Tim Chase <[email protected]> OpenZFS-issue: https://illumos.org/issues/9166 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7159fdb8 Closes #7570
* Tunable directory for zfs runtime scriptsAntonio Russo2018-06-071-1/+1
| | | | | | | | | | | | | zpool and zed place scripts in subdirectories of libexecdir. Some distributions locate architecture independent scripts in other locations (e.g. Debian). To avoid these paths getting out of sync, centralize the definitions. Build zfs-test's default.cfg by Makefile. Use the new directory logic building tests/zfs-tests/include/default.cfg.in. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Antonio Russo <[email protected]> Closes #7597
* Add pool state /proc entry, "SUSPENDED" poolsTony Hutter2018-06-061-1/+2
| | | | | | | | | | | | | | | | | | | 1. Add a proc entry to display the pool's state: $ cat /proc/spl/kstat/zfs/tank/state ONLINE This is done without using the spa config locks, so it will never hang. 2. Fix 'zpool status' and 'zpool list -o health' output to print "SUSPENDED" instead of "ONLINE" for suspended pools. Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed by: Richard Elling <[email protected]> Signed-off-by: Tony Hutter <[email protected]> Closes #7331 Closes #7563
* OpenZFS 9235 - rename zpool_rewind_policy_t to zpool_load_policy_tPavel Zakharov2018-06-041-4/+7
| | | | | | | | | | | | | | | | | | | | | | | We want to be able to pass various settings during import/open of a pool, which are not only related to rewind. Instead of adding a new policy and duplicate a bunch of code, we should just rename rewind_policy to a more generic term like load_policy. For instance, we'd like to set spa->spa_import_flags from the nvlist, rather from a flags parameter passed to spa_import as in some cases we want those flags not only for the import case, but also for the open case. One such flag could be ZFS_IMPORT_MISSING_LOG (as used in zdb) which would allow zfs to open a pool when logs are missing. Authored by: Pavel Zakharov <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://illumos.org/issues/9235 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d2b1e44 Closes #7532
* OpenZFS 9075 - Improve ZFS pool import/load process and corrupted pool recoveryPavel Zakharov2018-05-081-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some work has been done lately to improve the debugability of the ZFS pool load (and import) process. This includes: 7638 Refactor spa_load_impl into several functions 8961 SPA load/import should tell us why it failed 7277 zdb should be able to print zfs_dbgmsg's To iterate on top of that, there's a few changes that were made to make the import process more resilient and crash free. One of the first tasks during the pool load process is to parse a config provided from userland that describes what devices the pool is composed of. A vdev tree is generated from that config, and then all the vdevs are opened. The Meta Object Set (MOS) of the pool is accessed, and several metadata objects that are necessary to load the pool are read. The exact configuration of the pool is also stored inside the MOS. Since the configuration provided from userland is external and might not accurately describe the vdev tree of the pool at the txg that is being loaded, it cannot be relied upon to safely operate the pool. For that reason, the configuration in the MOS is read early on. In the past, the two configurations were compared together and if there was a mismatch then the load process was aborted and an error was returned. The latter was a good way to ensure a pool does not get corrupted, however it made the pool load process needlessly fragile in cases where the vdev configuration changed or the userland configuration was outdated. Since the MOS is stored in 3 copies, the configuration provided by userland doesn't have to be perfect in order to read its contents. Hence, a new approach has been adopted: The pool is first opened with the untrusted userland configuration just so that the real configuration can be read from the MOS. The trusted MOS configuration is then used to generate a new vdev tree and the pool is re-opened. When the pool is opened with an untrusted configuration, writes are disabled to avoid accidentally damaging it. During reads, some sanity checks are performed on block pointers to see if each DVA points to a known vdev; when the configuration is untrusted, instead of panicking the system if those checks fail we simply avoid issuing reads to the invalid DVAs. This new two-step pool load process now allows rewinding pools accross vdev tree changes such as device replacement, addition, etc. Loading a pool from an external config file in a clustering environment also becomes much safer now since the pool will import even if the config is outdated and didn't, for instance, register a recent device addition. With this code in place, it became relatively easy to implement a long-sought-after feature: the ability to import a pool with missing top level (i.e. non-redundant) devices. Note that since this almost guarantees some loss of data, this feature is for now restricted to a read-only import. Porting notes (ZTS): * Fix 'make dist' target in zpool_import * The maximum path length allowed by tar is 99 characters. Several of the new test cases exceeded this limit resulting in them not being included in the tarball. Shorten the names slightly. * Set/get tunables using accessor functions. * Get last synced txg via the "zfs_txg_history" mechanism. * Clear zinject handlers in cleanup for import_cache_device_replaced and import_rewind_device_replaced in order that the zpool can be exported if there is an error. * Increase FILESIZE to 8G in zfs-test.sh to allow for a larger ext4 file system to be created on ZFS_DISK2. Also, there's no need to partition ZFS_DISK2 at all. The partitioning had already been disabled for multipath devices. Among other things, the partitioning steals some space from the ext4 file system, makes it difficult to accurately calculate the paramters to parted and can make some of the tests fail. * Increase FS_SIZE and FILE_SIZE in the zpool_import test configuration now that FILESIZE is larger. * Write more data in order that device evacuation take lonnger in a couple tests. * Use mkdir -p to avoid errors when the directory already exists. * Remove use of sudo in import_rewind_config_changed. Authored by: Pavel Zakharov <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Andrew Stormont <[email protected]> Approved by: Hans Rosenfeld <[email protected]> Ported-by: Tim Chase <[email protected]> Signed-off-by: Tim Chase <[email protected]> OpenZFS-issue: https://illumos.org/issues/9075 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/619c0123 Closes #7459
* OpenZFS 7614, 9064 - zfs device evacuation/removalMatthew Ahrens2018-04-141-14/+193
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | OpenZFS 7614 - zfs device evacuation/removal OpenZFS 9064 - remove_mirror should wait for device removal to complete This project allows top-level vdevs to be removed from the storage pool with "zpool remove", reducing the total amount of storage in the pool. This operation copies all allocated regions of the device to be removed onto other devices, recording the mapping from old to new location. After the removal is complete, read and free operations to the removed (now "indirect") vdev must be remapped and performed at the new location on disk. The indirect mapping table is kept in memory whenever the pool is loaded, so there is minimal performance overhead when doing operations on the indirect vdev. The size of the in-memory mapping table will be reduced when its entries become "obsolete" because they are no longer used by any block pointers in the pool. An entry becomes obsolete when all the blocks that use it are freed. An entry can also become obsolete when all the snapshots that reference it are deleted, and the block pointers that reference it have been "remapped" in all filesystems/zvols (and clones). Whenever an indirect block is written, all the block pointers in it will be "remapped" to their new (concrete) locations if possible. This process can be accelerated by using the "zfs remap" command to proactively rewrite all indirect blocks that reference indirect (removed) vdevs. Note that when a device is removed, we do not verify the checksum of the data that is copied. This makes the process much faster, but if it were used on redundant vdevs (i.e. mirror or raidz vdevs), it would be possible to copy the wrong data, when we have the correct data on e.g. the other side of the mirror. At the moment, only mirrors and simple top-level vdevs can be removed and no removal is allowed if any of the top-level vdevs are raidz. Porting Notes: * Avoid zero-sized kmem_alloc() in vdev_compact_children(). The device evacuation code adds a dependency that vdev_compact_children() be able to properly empty the vdev_child array by setting it to NULL and zeroing vdev_children. Under Linux, kmem_alloc() and related functions return a sentinel pointer rather than NULL for zero-sized allocations. * Remove comment regarding "mpt" driver where zfs_remove_max_segment is initialized to SPA_MAXBLOCKSIZE. Change zfs_condense_indirect_commit_entry_delay_ticks to zfs_condense_indirect_commit_entry_delay_ms for consistency with most other tunables in which delays are specified in ms. * ZTS changes: Use set_tunable rather than mdb Use zpool sync as appropriate Use sync_pool instead of sync Kill jobs during test_removal_with_operation to allow unmount/export Don't add non-disk names such as "mirror" or "raidz" to $DISKS Use $TEST_BASE_DIR instead of /tmp Increase HZ from 100 to 1000 which is more common on Linux removal_multiple_indirection.ksh Reduce iterations in order to not time out on the code coverage builders. removal_resume_export: Functionally, the test case is correct but there exists a race where the kernel thread hasn't been fully started yet and is not visible. Wait for up to 1 second for the removal thread to be started before giving up on it. Also, increase the amount of data copied in order that the removal not finish before the export has a chance to fail. * MMP compatibility, the concept of concrete versus non-concrete devices has slightly changed the semantics of vdev_writeable(). Update mmp_random_leaf_impl() accordingly. * Updated dbuf_remap() to handle the org.zfsonlinux:large_dnode pool feature which is not supported by OpenZFS. * Added support for new vdev removal tracepoints. * Test cases removal_with_zdb and removal_condense_export have been intentionally disabled. When run manually they pass as intended, but when running in the automated test environment they produce unreliable results on the latest Fedora release. They may work better once the upstream pool import refectoring is merged into ZoL at which point they will be re-enabled. Authored by: Matthew Ahrens <[email protected]> Reviewed-by: Alex Reece <[email protected]> Reviewed-by: George Wilson <[email protected]> Reviewed-by: John Kennedy <[email protected]> Reviewed-by: Prakash Surya <[email protected]> Reviewed by: Richard Laager <[email protected]> Reviewed by: Tim Chase <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Garrett D'Amore <[email protected]> Ported-by: Tim Chase <[email protected]> Signed-off-by: Tim Chase <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/7614 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/f539f1eb Closes #6900
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