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* OpenZFS 8997 - ztest assertion failure in zil_lwb_write_issuePrakash Surya2018-01-262-10/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PROBLEM ======= When `dmu_tx_assign` is called from `zil_lwb_write_issue`, it's possible for either `ERESTART` or `EIO` to be returned. If `ERESTART` is returned, this will cause an assertion to fail directly in `zil_lwb_write_issue`, where the code assumes the return value is `EIO` if `dmu_tx_assign` returns a non-zero value. This can occur if the SPA is suspended when `dmu_tx_assign` is called, and most often occurs when running `zloop`. If `EIO` is returned, this can cause assertions to fail elsewhere in the ZIL code. For example, `zil_commit_waiter_timeout` contains the following logic: lwb_t *nlwb = zil_lwb_write_issue(zilog, lwb); ASSERT3S(lwb->lwb_state, !=, LWB_STATE_OPENED); In this case, if `dmu_tx_assign` returned `EIO` from within `zil_lwb_write_issue`, the `lwb` variable passed in will not be issued to disk. Thus, it's `lwb_state` field will remain `LWB_STATE_OPENED` and this assertion will fail. `zil_commit_waiter_timeout` assumes that after it calls `zil_lwb_write_issue`, the `lwb` will be issued to disk, and doesn't handle the case where this is not true; i.e. it doesn't handle the case where `dmu_tx_assign` returns `EIO`. SOLUTION ======== This change modifies the `dmu_tx_assign` function such that `txg_how` is a bitmask, rather than of the `txg_how_t` enum type. Now, the previous `TXG_WAITED` semantics can be used via `TXG_NOTHROTTLE`, along with specifying either `TXG_NOWAIT` or `TXG_WAIT` semantics. Previously, when `TXG_WAITED` was specified, `TXG_NOWAIT` semantics was automatically invoked. This was not ideal when using `TXG_WAITED` within `zil_lwb_write_issued`, leading the problem described above. Rather, we want to achieve the semantics of `TXG_WAIT`, while also preventing the `tx` from being penalized via the dirty delay throttling. With this change, `zil_lwb_write_issued` can acheive the semtantics that it requires by passing in the value `TXG_WAIT | TXG_NOTHROTTLE` to `dmu_tx_assign`. Further, consumers of `dmu_tx_assign` wishing to achieve the old `TXG_WAITED` semantics can pass in the value `TXG_NOWAIT | TXG_NOTHROTTLE`. Authored by: Prakash Surya <[email protected]> Approved by: Robert Mustacchi <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Andriy Gapon <[email protected]> Ported-by: Brian Behlendorf <[email protected]> Porting Notes: - Additionally updated `zfs_tmpfile` to use `TXG_NOTHROTTLE` OpenZFS-issue: https://www.illumos.org/issues/8997 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/19ea6cb0f9 Closes #7084
* Extend deadman logicBrian Behlendorf2018-01-256-3/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The intent of this patch is extend the existing deadman code such that it's flexible enough to be used by both ztest and on production systems. The proposed changes include: * Added a new `zfs_deadman_failmode` module option which is used to dynamically control the behavior of the deadman. It's loosely modeled after, but independant from, the pool failmode property. It can be set to wait, continue, or panic. * wait - Wait for the "hung" I/O (default) * continue - Attempt to recover from a "hung" I/O * panic - Panic the system * Added a new `zfs_deadman_ziotime_ms` module option which is analogous to `zfs_deadman_synctime_ms` except instead of applying to a pool TXG sync it applies to zio_wait(). A default value of 300s is used to define a "hung" zio. * The ztest deadman thread has been re-enabled by default, aligned with the upstream OpenZFS code, and then extended to terminate the process when it takes significantly longer to complete than expected. * The -G option was added to ztest to print the internal debug log when a fatal error is encountered. This same option was previously added to zdb in commit fa603f82. Update zloop.sh to unconditionally pass -G to obtain additional debugging. * The FM_EREPORT_ZFS_DELAY event which was previously posted when the deadman detect a "hung" pool has been replaced by a new dedicated FM_EREPORT_ZFS_DEADMAN event. * The proposed recovery logic attempts to restart a "hung" zio by calling zio_interrupt() on any outstanding leaf zios. We may want to further restrict this to zios in either the ZIO_STAGE_VDEV_IO_START or ZIO_STAGE_VDEV_IO_DONE stages. Calling zio_interrupt() is expected to only be useful for cases when an IO has been submitted to the physical device but for some reasonable the completion callback hasn't been called by the lower layers. This shouldn't be possible but has been observed and may be caused by kernel/driver bugs. * The 'zfs_deadman_synctime_ms' default value was reduced from 1000s to 600s. * Depending on how ztest fails there may be no cache file to move. This should not be considered fatal, collect the logs which are available and carry on. * Add deadman test cases for spa_deadman() and zio_wait(). * Increase default zfs_deadman_checktime_ms to 60s. Reviewed-by: Tim Chase <[email protected]> Reviewed by: Thomas Caputi <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6999
* OpenZFS 8652 - Tautological comparisons with ZPROP_INVALBrian Behlendorf2018-01-191-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | usr/src/uts/common/sys/fs/zfs.h Change ZPROP_INVAL and ZPROP_CONT from macros to enum values. Clang and GCC both prefer to use unsigned ints to store enums. That was causing tautological comparison warnings (and likely eliminating error handling code at compile time) whenever a zfs_prop_t or zpool_prop_t was compared to ZPROP_INVAL or ZPROP_CONT. Making the error flags be explicity enum values forces the enum types to be signed. ZPROP_INVAL was also compared against two different enum types. I had to change its name to ZPOOL_PROP_INVAL whenever its compared to a zpool_prop_t. There are still some places where ZPROP_INVAL or ZPROP_CONT is compared to a plain int, in code that doesn't know whether the int is storing a zfs_prop_t or a zpool_prop_t. usr/src/uts/common/fs/zfs/spa.c s/ZPROP_INVAL/ZPOOL_PROP_INVAL/ Authored by: Alan Somers <[email protected]> Approved by: Gordon Ross <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Igor Kozhukhov <[email protected]> Reviewed by: George Melikov <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8652 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c2de80dc74 Closes #7061
* OpenZFS 8959 - Add notifications when a scrub is paused or resumedSean Eric Fagan2018-01-171-0/+3
| | | | | | | | | | | | | | | | | | | Authored by: Sean Eric Fagan <[email protected]> Reviewed by: Alek Pinchuk <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Approved by: Gordon Ross <[email protected]> Ported-by: Giuseppe Di Natale <[email protected]> Porting Notes: - Brought #defines in eventdefs.h in line with ZFS on Linux format. - Updated zfs-events.5 with the new events. OpenZFS-issue: https://www.illumos.org/issues/8959 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c862b93eea Closes #7049
* Force ztest to always use /dev/urandomBrian Behlendorf2018-01-121-0/+2
| | | | | | | | | | | | For ztest, which is solely for testing, using a pseudo random is entirely reasonable. Using /dev/urandom ensures the system entropy pool doesn't get depleted thus stalling the testing. This is a particular problem when testing in VMs. Reviewed-by: Tim Chase <[email protected]> Reviewed by: Thomas Caputi <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #7017 Closes #7036
* Revert raidz_map and _col structure typesNathaniel Wesley Filardo2018-01-091-17/+17
| | | | | | | | | | | | | | | As part of the refactoring of ab9f4b0b824ab4cc64a4fa382c037f4154de12d6, several uint64_t-s and uint8_t-s were changed to other types. This caused ZoL github issue #6981, an overflow of a size_t on a 32-bit ARM machine. In absense of any strong motivation for the type changes, this simply puts them back, modulo the changes accumulated for ABD. Compile-tested on amd64 and run-tested on armhf. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Gvozden Neskovic <[email protected]> Signed-off-by: Nathaniel Wesley Filardo <[email protected]> Closes #6981 Closes #7023
* Fix ARC hit rateBrian Behlendorf2018-01-081-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | When the compressed ARC feature was added in commit d3c2ae1 the method of reference counting in the ARC was modified. As part of this accounting change the arc_buf_add_ref() function was removed entirely. This would have be fine but the arc_buf_add_ref() function served a second undocumented purpose of updating the ARC access information when taking a hold on a dbuf. Without this logic in place a cached dbuf would not migrate its associated arc_buf_hdr_t to the MFU list. This would negatively impact the ARC hit rate, particularly on systems with a small ARC. This change reinstates the missing call to arc_access() from dbuf_hold() by implementing a new arc_buf_access() function. Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Tim Chase <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6171 Closes #6852 Closes #6989
* OpenZFS 8909 - 8585 can cause a use-after-free kernel panicPrakash Surya2017-12-283-8/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Authored by: Prakash Surya <[email protected]> Reviewed by: John Kennedy <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Brad Lewis <[email protected]> Reviewed by: Igor Kozhukhov <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported-by: Prakash Surya <[email protected]> PROBLEM ======= There's a race condition that exists if `zil_free_lwb` races with either `zil_commit_waiter_timeout` and/or `zil_lwb_flush_vdevs_done`. Here's an example panic due to this bug: > ::status debugging crash dump vmcore.0 (64-bit) from ip-10-110-205-40 operating system: 5.11 dlpx-5.2.2.0_2017-12-04-17-28-32b6ba51fb (i86pc) image uuid: 4af0edfb-e58e-6ed8-cafc-d3e9167c7513 panic message: BAD TRAP: type=e (#pf Page fault) rp=ffffff0010555970 addr=60 occurred in module "zfs" due to a NULL pointer dereference dump content: kernel pages only > $c zio_shrink+0x12() zil_lwb_write_issue+0x30d(ffffff03dcd15cc0, ffffff03e0730e20) zil_commit_waiter_timeout+0xa2(ffffff03dcd15cc0, ffffff03d97ffcf8) zil_commit_waiter+0xf3(ffffff03dcd15cc0, ffffff03d97ffcf8) zil_commit+0x80(ffffff03dcd15cc0, 9a9) zfs_write+0xc34(ffffff03dc38b140, ffffff0010555e60, 40, ffffff03e00fb758, 0) fop_write+0x5b(ffffff03dc38b140, ffffff0010555e60, 40, ffffff03e00fb758, 0) write+0x250(42, fffffd7ff4832000, 2000) sys_syscall+0x177() If there's an outstanding lwb that's in `zil_commit_waiter_timeout` waiting to timeout, waiting on it's waiter's CV, we must be sure not to call `zil_free_lwb`. If we end up calling `zil_free_lwb`, then that LWB may be freed and can result in a use-after-free situation where the stale lwb pointer stored in the `zil_commit_waiter_t` structure of the thread waiting on the waiter's CV is used. A similar situation can occur if an lwb is issued to disk, and thus in the `LWB_STATE_ISSUED` state, and `zil_free_lwb` is called while the disk is servicing that lwb. In this situation, the lwb will be freed by `zil_free_lwb`, which will result in a use-after-free situation when the lwb's zio completes, and `zil_lwb_flush_vdevs_done` is called. This race condition is prevented in `zil_close` by calling `zil_commit` before `zil_free_lwb` is called, which will ensure all outstanding (i.e. all lwb's in the `LWB_STATE_OPEN` and/or `LWB_STATE_ISSUED` states) reach the `LWB_STATE_DONE` state before the lwb's are freed (`zil_commit` will not return untill all the lwb's are `LWB_STATE_DONE`). Further, this race condition is prevented in `zil_sync` by only calling `zil_free_lwb` for lwb's that do not have their `lwb_buf` pointer set. All lwb's not in the `LWB_STATE_DONE` state will have a non-null value for this pointer; the pointer is only cleared in `zil_lwb_flush_vdevs_done`, at which point the lwb's state will be changed to `LWB_STATE_DONE`. This race *is* present in `zil_suspend`, leading to this bug. At first glance, it would appear as though this would not be true because `zil_suspend` will call `zil_commit`, just like `zil_close`, but the problem is that `zil_suspend` will set the zilog's `zl_suspend` field prior to calling `zil_commit`. Further, in `zil_commit`, if `zl_suspend` is set, `zil_commit` will take a special branch of logic and use `txg_wait_synced` instead of performing the normal `zil_commit` logic. This call to `txg_wait_synced` might be good enough for the data to reach disk safely before it returns, but it does not ensure that all outstanding lwb's reach the `LWB_STATE_DONE` state before it returns. This is because, if there's an lwb "stuck" in `zil_commit_waiter_timeout`, waiting for it's lwb to timeout, it will maintain a non-null value for it's `lwb_buf` field and thus `zil_sync` will not free that lwb. Thus, even though the lwb's data is already on disk, the lwb will be left lingering, waiting on the CV, and will eventually timeout and be issued to disk even though the write is unnecessary. So, after `zil_commit` is called from `zil_suspend`, we incorrectly assume that there are not outstanding lwb's, and proceed to free all lwb's found on the zilog's lwb list. As a result, we free the lwb that will later be used `zil_commit_waiter_timeout`. SOLUTION ======== The solution to this, is to ensure all outstanding lwb's complete before calling `zil_free_lwb` via `zil_destroy` in `zil_suspend`. This patch accomplishes this goal by forcing the normal `zil_commit` logic when called from `zil_sync`. Now, `zil_suspend` will call `zil_commit_impl` which will always use the normal logic of waiting/issuing lwb's to disk before it returns. As a result, any lwb's outstanding when `zil_commit_impl` is called will be guaranteed to reach the `LWB_STATE_DONE` state by the time it returns. Further, no new lwb's will be created via `zil_commit` since the zilog's `zl_suspend` flag will be set. This will force all new callers of `zil_commit` to use `txg_wait_synced` instead of creating and issuing new lwb's. Thus, all lwb's left on the zilog's lwb list when `zil_destroy` is called will be in the `LWB_STATE_DONE` state, and we'll avoid this race condition. OpenZFS-issue: https://www.illumos.org/issues/8909 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/ece62b6f8d Closes #6940
* Call commit callbacks from the tail of the listlidongyang2017-12-222-4/+5
| | | | | | | | | | | | | | | | | | | | Our zfs backed Lustre MDT had soft lockups while under heavy metadata workloads while handling transaction callbacks from osd_zfs. The problem is zfs is not taking advantage of the fast path in Lustre's trans callback handling, where Lustre will skip the calls to ptlrpc_commit_replies() when it already saw a higher transaction number. This patch corrects this, it also has a positive impact on metadata performance on Lustre with osd_zfs, plus some cleanup in the headers. A similar issue for ext4/ldiskfs is described on: https://jira.hpdd.intel.com/browse/LU-6527 Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Li Dongyang <[email protected]> Closes #6986
* Support re-prioritizing asynchronous prefetchesTom Caputi2017-12-214-1/+5
| | | | | | | | | | | | | | | | | | | | | When sequential scrubs were merged, all calls to arc_read() (including prefetch IOs) were given ZIO_PRIORITY_ASYNC_READ. Unfortunately, this behaves badly with an existing issue where prefetch IOs cannot be re-prioritized after the issue. The result is that synchronous reads end up in the same vdev_queue as the scrub IOs and can have (in some workloads) multiple seconds of latency. This patch incorporates 2 changes. The first ensures that all scrub IOs are given ZIO_PRIORITY_SCRUB to allow the vdev_queue code to differentiate between these I/Os and user prefetches. Second, this patch introduces zio_change_priority() to provide the missing capability to upgrade a zio's priority. Reviewed by: George Wilson <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #6921 Closes #6926
* Suppress incorrect objtool warningsBrian Behlendorf2017-12-072-0/+37
| | | | | | | | | | | | Suppress incorrect warnings from versions of objtool which are not aware of x86 EVEX prefix instructions used for AVX512. module/zfs/vdev_raidz_math_avx512bw.o: warning: objtool: <func+offset>: can't find jump dest instruction at .text Reviewed-by: Don Brady <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6928
* OpenZFS 8603 - rename zilog's "zl_writer_lock" to "zl_issuer_lock"Prakash Surya2017-12-061-5/+5
| | | | | | | | | | | | | | | | This is a purely cosmetic change. The zilog's "zl_writer_lock" field is being renamed to "zl_issuer_lock" to try and make the code easier to understand; no other changes are made. Authored by: Prakash Surya <[email protected]> Reviewed by: C Fraire <[email protected]> Approved by: Dan McDonald <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Ported-by: Giuseppe Di Natale <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8603 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/2daf06546b Closes #6927
* OpenZFS 8585 - improve batching done in zil_commit()Prakash Surya2017-12-055-85/+233
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Authored by: Prakash Surya <[email protected]> Reviewed by: Brad Lewis <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Approved by: Dan McDonald <[email protected]> Ported-by: Prakash Surya <[email protected]> Problem ======= The current implementation of zil_commit() can introduce significant latency, beyond what is inherent due to the latency of the underlying storage. The additional latency comes from two main problems: 1. When there's outstanding ZIL blocks being written (i.e. there's already a "writer thread" in progress), then any new calls to zil_commit() will block waiting for the currently oustanding ZIL blocks to complete. The blocks written for each "writer thread" is coined a "batch", and there can only ever be a single "batch" being written at a time. When a batch is being written, any new ZIL transactions will have to wait for the next batch to be written, which won't occur until the current batch finishes. As a result, the underlying storage may not be used as efficiently as possible. While "new" threads enter zil_commit() and are blocked waiting for the next batch, it's possible that the underlying storage isn't fully utilized by the current batch of ZIL blocks. In that case, it'd be better to allow these new threads to generate (and issue) a new ZIL block, such that it could be serviced by the underlying storage concurrently with the other ZIL blocks that are being serviced. 2. Any call to zil_commit() must wait for all ZIL blocks in its "batch" to complete, prior to zil_commit() returning. The size of any given batch is proportional to the number of ZIL transaction in the queue at the time that the batch starts processing the queue; which doesn't occur until the previous batch completes. Thus, if there's a lot of transactions in the queue, the batch could be composed of many ZIL blocks, and each call to zil_commit() will have to wait for all of these writes to complete (even if the thread calling zil_commit() only cared about one of the transactions in the batch). To further complicate the situation, these two issues result in the following side effect: 3. If a given batch takes longer to complete than normal, this results in larger batch sizes, which then take longer to complete and further drive up the latency of zil_commit(). This can occur for a number of reasons, including (but not limited to): transient changes in the workload, and storage latency irregularites. Solution ======== The solution attempted by this change has the following goals: 1. no on-disk changes; maintain current on-disk format. 2. modify the "batch size" to be equal to the "ZIL block size". 3. allow new batches to be generated and issued to disk, while there's already batches being serviced by the disk. 4. allow zil_commit() to wait for as few ZIL blocks as possible. 5. use as few ZIL blocks as possible, for the same amount of ZIL transactions, without introducing significant latency to any individual ZIL transaction. i.e. use fewer, but larger, ZIL blocks. In theory, with these goals met, the new allgorithm will allow the following improvements: 1. new ZIL blocks can be generated and issued, while there's already oustanding ZIL blocks being serviced by the storage. 2. the latency of zil_commit() should be proportional to the underlying storage latency, rather than the incoming synchronous workload. Porting Notes ============= Due to the changes made in commit 119a394ab0, the lifetime of an itx structure differs than in OpenZFS. Specifically, the itx structure is kept around until the data associated with the itx is considered to be safe on disk; this is so that the itx's callback can be called after the data is committed to stable storage. Since OpenZFS doesn't have this itx callback mechanism, it's able to destroy the itx structure immediately after the itx is committed to an lwb (before the lwb is written to disk). To support this difference, and to ensure the itx's callbacks can still be called after the itx's data is on disk, a few changes had to be made: * A list of itxs was added to the lwb structure. This list contains all of the itxs that have been committed to the lwb, such that the callbacks for these itxs can be called from zil_lwb_flush_vdevs_done(), after the data for the itxs is committed to disk. * A list of itxs was added on the stack of the zil_process_commit_list() function; the "nolwb_itxs" list. In some circumstances, an itx may not be committed to an lwb (e.g. if allocating the "next" ZIL block on disk fails), so this list is used to keep track of which itxs fall into this state, such that their callbacks can be called after the ZIL's writer pipeline is "stalled". * The logic to actually call the itx's callback was moved into the zil_itx_destroy() function. Since all consumers of zil_itx_destroy() were effectively performing the same logic (i.e. if callback is non-null, call the callback), it seemed like useful code cleanup to consolidate this logic into a single function. Additionally, the existing Linux tracepoint infrastructure dealing with the ZIL's probes and structures had to be updated to reflect these code changes. Specifically: * The "zil__cw1" and "zil__cw2" probes were removed, so they had to be removed from "trace_zil.h" as well. * Some of the zilog structure's fields were removed, which affected the tracepoint definitions of the structure. * New tracepoints had to be added for the following 3 new probes: * zil__process__commit__itx * zil__process__normal__itx * zil__commit__io__error OpenZFS-issue: https://www.illumos.org/issues/8585 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/5d95a3a Closes #6566
* Preserve itx alloc size for zio_data_buf_free()Brian Behlendorf2017-12-041-0/+1
| | | | | | | | | | | | | | Using zio_data_buf_alloc() to allocate the itx's may be unsafe because the itx->itx_lr.lrc_reclen field is not constant from allocation to free. Using a different itx->itx_lr.lrc_reclen size in zio_data_buf_free() can result in the allocation being returned to the wrong kmem cache. This issue can be avoided entirely by storing the allocation size in itx->itx_size and using that for zio_data_buf_free(). Reviewed by: Prakash Surya <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6912
* Unbreak the scan status ABITom Caputi2017-11-301-1/+1
| | | | | | | | | | When d4a72f23 was merged, pss_pass_issued was incorrectly added to the middle of the pool_scan_stat_t structure instead of the end. This patch simply corrects this issue. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #6909
* Sequential scrub and resilversTom Caputi2017-11-157-28/+100
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, scrubs and resilvers can take an extremely long time to complete. This is largely due to the fact that zfs scans process pools in logical order, as determined by each block's bookmark. This makes sense from a simplicity perspective, but blocks in zfs are often scattered randomly across disks, particularly due to zfs's copy-on-write mechanisms. This patch improves performance by splitting scrubs and resilvers into a metadata scanning phase and an IO issuing phase. The metadata scan reads through the structure of the pool and gathers an in-memory queue of I/Os, sorted by size and offset on disk. The issuing phase will then issue the scrub I/Os as sequentially as possible, greatly improving performance. This patch also updates and cleans up some of the scan code which has not been updated in several years. Reviewed-by: Brian Behlendorf <[email protected]> Authored-by: Saso Kiselkov <[email protected]> Authored-by: Alek Pinchuk <[email protected]> Authored-by: Tom Caputi <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #3625 Closes #6256
* OpenZFS 7531 - Assign correct flags to prefetched buffersbenrubson2017-11-111-0/+6
| | | | | | | | | | | Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Prakash Surya <[email protected]> Authored by: abraunegg <[email protected]> Approved by: Dan McDonald <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/7531 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/468008cb
* Undo c89 workarounds to match with upstreamDon Brady2017-11-041-2/+1
| | | | | | | | | With PR 5756 the zfs module now supports c99 and the remaining past c89 workarounds can be undone. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #6816
* OpenZFS 640 - number_to_scaled_string is duplicated in several commandsJason King2017-10-301-1/+4
| | | | | | | | | | | | | | | | | | | Porting Notes: - The OpenZFS patch added nicenum_scale() and nicenum() to a library not used by ZFS. Rather than pull in a new dependency the version of nicenum in lib/libzpool/util.c was simply replaced with the new one. Reviewed by: Sebastian Wiedenroth <[email protected]> Reviewed by: Robert Mustacchi <[email protected]> Reviewed by: Yuri Pankov <[email protected]> Approved by: Dan McDonald <[email protected]> Authored by: Jason King <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/640 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/0a055120 Closes #6796
* OpenZFS 8081 - Compiler warnings in zdbBrian Behlendorf2017-10-273-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix compiler warnings in zdb. With these changes, FreeBSD can compile zdb with all compiler warnings enabled save -Wunused-parameter. usr/src/cmd/zdb/zdb.c usr/src/cmd/zdb/zdb_il.c usr/src/uts/common/fs/zfs/sys/sa.h usr/src/uts/common/fs/zfs/sys/spa.h Fix numerous warnings, including: * const-correctness * shadowing global definitions * signed vs unsigned comparisons * missing prototypes, or missing static declarations * unused variables and functions * Unreadable array initializations * Missing struct initializers usr/src/cmd/zdb/zdb.h Add a header file to declare common symbols usr/src/lib/libzpool/common/sys/zfs_context.h usr/src/uts/common/fs/zfs/arc.c usr/src/uts/common/fs/zfs/dbuf.c usr/src/uts/common/fs/zfs/spa.c usr/src/uts/common/fs/zfs/txg.c Add a function prototype for zk_thread_create, and ensure that every callback supplied to this function actually matches the prototype. usr/src/cmd/ztest/ztest.c usr/src/uts/common/fs/zfs/sys/zil.h usr/src/uts/common/fs/zfs/zfs_replay.c usr/src/uts/common/fs/zfs/zvol.c Add a function prototype for zil_replay_func_t, and ensure that every function of this type actually matches the prototype. usr/src/uts/common/fs/zfs/sys/refcount.h Change FTAG so it discards any constness of __func__, necessary since existing APIs expect it passed as void *. Porting Notes: - Many of these fixes have already been applied to Linux. For consistency the OpenZFS version of a change was applied if the warning was addressed in an equivalent but different fashion. Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Prakash Surya <[email protected]> Authored by: Alan Somers <[email protected]> Approved by: Richard Lowe <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8081 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/843abe1b8a Closes #6787
* OpenZFS 8558, 8602 - lwp_create() returns EAGAINBrian Behlendorf2017-10-262-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 8558 lwp_create() returns EAGAIN on system with more than 80K ZFS filesystems On a system with more than 80K ZFS filesystems, we've seen cases where lwp_create() will start to fail by returning EAGAIN. The problem being, for each of those 80K ZFS filesystems, a taskq will be created for each dataset as part of the ZIL for each dataset. Porting Notes: - The new nomem taskq kstat was dropped. - Added module options and documentation for new tunings zfs_zil_clean_taskq_nthr_pct, zfs_zil_clean_taskq_minalloc, zfs_zil_clean_taskq_maxalloc, and zfs_sync_taskq_batch_pct. Reviewed by: George Wilson <[email protected]> Reviewed by: Sebastien Roy <[email protected]> Approved by: Robert Mustacchi <[email protected]> Authored by: Prakash Surya <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Chris Dunlop <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8558 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/216d772 8602 remove unused "dp_early_sync_tasks" field from "dsl_pool" structure Reviewed by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Robert Mustacchi <[email protected]> Authored by: Prakash Surya <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Chris Dunlop <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8602 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/2bcb545 Closes #6779
* Added no_scrub_restart flag to zpool reopenArkadiusz Bubała2017-10-262-1/+4
| | | | | | | | | | | | | | | | | | | | | | | Added -n flag to zpool reopen that allows a running scrub operation to continue if there is a device with Dirty Time Log. By default if a component device has a DTL and zpool reopen is executed all running scan operations will be restarted. Added functional tests for `zpool reopen` Tests covers following scenarios: * `zpool reopen` without arguments, * `zpool reopen` with pool name as argument, * `zpool reopen` while scrubbing, * `zpool reopen -n` while scrubbing, * `zpool reopen -n` while resilvering, * `zpool reopen` with bad arguments. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Tom Caputi <[email protected]> Signed-off-by: Arkadiusz Bubała <[email protected]> Closes #6076 Closes #6746
* Emit history events for 'zpool create'Brian Behlendorf2017-10-232-1/+3
| | | | | | | | | | | | | | | | | | | History commands and events were being suppressed for the 'zpool create' command since the history object did not yet exist. Create the object earlier so this history doesn't get lost. Split the pool_destroy event in to pool_destroy and pool_export so they may be distinguished. Updated events_001_pos and events_002_pos test cases. They now check for the expected history events and were reworked to be more reliable. Reviewed-by: Nathaniel Clark <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6712 Closes #6486
* Add convenience 'zfs_get' functionsJohn2017-10-191-0/+1
| | | | | | | | Add get functions to match existing ones. Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: John Ramsden <[email protected]> Closes #6308
* Post-Encryption FollowupBrian Behlendorf2017-10-135-18/+44
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | This PR includes fixes for bugs and documentation issues found after the encryption patch was merged and general code improvements for long-term maintainability. Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Issue #6526 Closes #6639 Closes #6703 Cloese #6706 Closes #6714 Closes #6595
| * Fixes for #6639Tom Caputi2017-10-112-6/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several issues were uncovered by running stress tests with zfs encryption and raw sends in particular. The issues and their associated fixes are as follows: * arc_read_done() has the ability to chain several requests for the same block of data via the arc_callback_t struct. In these cases, the ARC would only use the first request's dsobj from the bookmark to decrypt the data. This is problematic because the first request might be a prefetch zio which is able to handle the key not being loaded, while the second might use a different key that it is sure will work. The fix here is to pass the dsobj with each individual arc_callback_t so that each request can attempt to decrypt the data separately. * DRR_FREE and DRR_FREEOBJECT records in a send file were not having their transactions properly tagged as raw during raw sends, which caused a panic when the dbuf code attempted to decrypt these blocks. * traverse_prefetch_metadata() did not properly set ZIO_FLAG_SPECULATIVE when issuing prefetch IOs. * Added a few asserts and code cleanups to ensure these issues are more detectable in the future. Signed-off-by: Tom Caputi <[email protected]>
| * Encryption patch follow-upTom Caputi2017-10-113-12/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * PBKDF2 implementation changed to OpenSSL implementation. * HKDF implementation moved to its own file and tests added to ensure correctness. * Removed libzfs's now unnecessary dependency on libzpool and libicp. * Ztest can now create and test encrypted datasets. This is currently disabled until issue #6526 is resolved, but otherwise functions as advertised. * Several small bug fixes discovered after enabling ztest to run on encrypted datasets. * Fixed coverity defects added by the encryption patch. * Updated man pages for encrypted send / receive behavior. * Fixed a bug where encrypted datasets could receive DRR_WRITE_EMBEDDED records. * Minor code cleanups / consolidation. Signed-off-by: Tom Caputi <[email protected]>
* | Typo in dsl_dataset.hDamian Wojsław2017-10-121-3/+3
|/ | | | | | | | | The parameters dsl_dataset_t *os in function prototype should be renamed to dsl_dataset_t *ds. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Damian Wojsław <[email protected]> Closes #6756 Closes #6273
* Free objects when receiving full stream as cloneFabian Grünbichler2017-10-101-0/+1
| | | | | | | | | | | | | All objects after the last written or freed object are not supposed to exist after receiving the stream. Free them accordingly, as if a freeobjects record for them had been included in the stream. Reviewed by: Paul Dagnelie <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Fabian Grünbichler <[email protected]> Closes #5699 Closes #6507 Closes #6616
* Remove dead code from AVL treeBrian Behlendorf2017-10-051-11/+0
| | | | | | | | | | | The avl_update_* functions are never used by ZFS and are therefore being removed. They're barely even used in Illumos. Additionally, simplify avl_add() by using a VERIFY which produces exactly the same behavior under Linux. Reviewed-by: George Melikov <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6716
* Scale the dbuf cache with arc_cchrisrd2017-09-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Commit d3c2ae1 introduced a dbuf cache with a default size of the minimum of 100M or 1/32 maximum ARC size. (These figures may be adjusted using dbuf_cache_max_bytes and dbuf_cache_max_shift.) The dbuf cache is counted as metadata for the purposes of ARC size calculations. On a 1GB box the ARC maximum size defaults to c_max 493M which gives a dbuf cache default minimum size of 15.4M, and the ARC metadata defaults to minimum 16M. I.e. the dbuf cache is an significant proportion of the minimum metadata size. With other overheads involved this actually means the ARC metadata doesn't get down to the minimum. This patch dynamically scales the dbuf cache to the target ARC size instead of statically scaling it to the maximum ARC size. (The scale is still set by dbuf_cache_max_shift and the maximum size is still fixed by dbuf_cache_max_bytes.) Using the target ARC size rather than the current ARC size is done to help the ARC reach the target rather than simply focusing on the current size. Reviewed-by: Chunwei Chen <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Chris Dunlop <[email protected]> Issue #6506 Closes #6561
* Correct cppcheck errorsGiuseppe Di Natale2017-09-191-6/+0
| | | | | | | | | | | | | ZFS buildbot STYLE builder was moved to Ubuntu 17.04 which has a newer version of cppcheck. Handle the new cppcheck errors. uu_* functions removed in this commit were unused and effectively dead code. They are now retired. Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Giuseppe Di Natale <[email protected]> Closes #6653
* Remove FRU and LIBTOPO SupportDavid Quigley2017-09-182-29/+0
| | | | | | | | | FRU and LIBTOPO support are illumos only features that will not be ported to Linux and make the code more complicated than necessary. This commit makes way for further cleanups of the zed/FMA code. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: David Quigley <[email protected]> Closes #6641
* Linux 3.14 compat: IO acct, global_page_state, etcGiuseppe Di Natale2017-09-161-4/+14
| | | | | | | | | | | | | | | | | | | | | | generic_start_io_acct/generic_end_io_acct in the master branch of the linux kernel requires that the request_queue be provided. Move the logic from freemem in the spl to arc_free_memory in arc.c. Do this so we can take advantage of global_page_state interface checks in zfs. Upstream kernel replaced struct block_device with struct gendisk in struct bio. Determine if the function bio_set_dev exists during configure and have zfs use that if it exists. bio_set_dev https://github.com/torvalds/linux/commit/74d4699 global_node_page_state https://github.com/torvalds/linux/commit/75ef718 io acct https://github.com/torvalds/linux/commit/d62e26b Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Giuseppe Di Natale <[email protected]> Closes #6635
* Add -vnP support to 'zfs send' for bookmarksLOLi2017-09-081-1/+1
| | | | | | | | | This leverages the functionality introduced in cf7684b to expose verbose, dry-run and parsable 'zfs send' options for bookmarks. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #3666 Closes #6601
* Improved dnode allocation and dmu_hold_impl()Olaf Faaland2017-09-051-0/+136
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Refactor dmu_object_alloc_dnsize() and dnode_hold_impl() to simplify the code, fix errors introduced by commit dbeb879 (PR #6117) interacting badly with large dnodes, and improve performance. * When allocating a new dnode in dmu_object_alloc_dnsize(), update the percpu object ID for the core's metadnode chunk immediately. This eliminates most lock contention when taking the hold and creating the dnode. * Correct detection of the chunk boundary to work properly with large dnodes. * Separate the dmu_hold_impl() code for the FREE case from the code for the ALLOCATED case to make it easier to read. * Fully populate the dnode handle array immediately after reading a block of the metadnode from disk. Subsequently the dnode handle array provides enough information to determine which dnode slots are in use and which are free. * Add several kstats to allow the behavior of the code to be examined. * Verify dnode packing in large_dnode_008_pos.ksh. Since the test is purely creates, it should leave very few holes in the metadnode. * Add test large_dnode_009_pos.ksh, which performs concurrent creates and deletes, to complement existing test which does only creates. With the above fixes, there is very little contention in a test of about 200,000 racing dnode allocations produced by tests 'large_dnode_008_pos' and 'large_dnode_009_pos'. name type data dnode_hold_dbuf_hold 4 0 dnode_hold_dbuf_read 4 0 dnode_hold_alloc_hits 4 3804690 dnode_hold_alloc_misses 4 216 dnode_hold_alloc_interior 4 3 dnode_hold_alloc_lock_retry 4 0 dnode_hold_alloc_lock_misses 4 0 dnode_hold_alloc_type_none 4 0 dnode_hold_free_hits 4 203105 dnode_hold_free_misses 4 4 dnode_hold_free_lock_misses 4 0 dnode_hold_free_lock_retry 4 0 dnode_hold_free_overflow 4 0 dnode_hold_free_refcount 4 57 dnode_hold_free_txg 4 0 dnode_allocate 4 203154 dnode_reallocate 4 0 dnode_buf_evict 4 23918 dnode_alloc_next_chunk 4 4887 dnode_alloc_race 4 0 dnode_alloc_next_block 4 18 The performance is slightly improved for concurrent creates with 16+ threads, and unchanged for low thread counts. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Olaf Faaland <[email protected]> Closes #5396 Closes #6522 Closes #6414 Closes #6564
* Enhance comments for large dnode projectMatthew Ahrens2017-08-291-0/+51
| | | | | | | | | | | | | Fix a few nits in the comments from large dnodes. Also import some of the commit message as a comment in the code, making it more accessible. Reviewed-by: @rottegift Reviewed-by: George Melikov <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: George Wilson <[email protected]> Signed-off-by: Matt Ahrens <[email protected]> Closes #6551
* Send / Recv Fixes following b52563Tom Caputi2017-08-232-11/+10
| | | | | | | | | | | | | | | | | | | | | | This patch fixes several issues discovered after the encryption patch was merged: * Fixed a bug where encrypted datasets could attempt to receive embedded data records. * Fixed a bug where dirty records created by the recv code wasn't properly setting the dr_raw flag. * Fixed a typo where a dmu_tx_commit() was changed to dmu_tx_abort() * Fixed a few error handling bugs unrelated to the encryption patch in dmu_recv_stream() Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #6512 Closes #6524 Closes #6545
* vdev_mirror: kstat observables for preferred vdevGvozden Neskovic2017-08-211-0/+4
| | | | | | Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Gvozden Neskovic <[email protected]> Closes #6461
* vdev_mirror: load balancing fixesGvozden Neskovic2017-08-212-3/+1
| | | | | | | | | | | | | | | | vdev_queue: - Track the last position of each vdev, including the io size, in order to detect linear access of the following zio. - Remove duplicate `vq_lastoffset` vdev_mirror: - Correctly calculate the zio offset (signedness issue) - Deprecate `vdev_queue_register_lastoffset()` - Add `VDEV_LABEL_START_SIZE` to zio offset of leaf vdevs Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Gvozden Neskovic <[email protected]> Closes #6461
* Retire legacy test infrastructureBrian Behlendorf2017-08-153-328/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Removed zpios kmod, utility, headers and man page. * Removed unused scripts zpios-profile/*, zpios-test/*, zpool-config/*, smb.sh, zpios-sanity.sh, zpios-survey.sh, zpios.sh, and zpool-create.sh. * Removed zfs-script-config.sh.in. When building 'make' generates a common.sh with in-tree path information from the common.sh.in template. This file and sourced by the test scripts and used for in-tree testing, it is not included in the packages. When building packages 'make install' uses the same template to create a new common.sh which is appropriate for the packaging. * Removed unused functions/variables from scripts/common.sh.in. Only minimal path information and configuration environment variables remain. * Removed unused scripts from scripts/ directory. * Remaining shell scripts in the scripts directory updated to cleanly pass shellcheck and added to checked scripts. * Renamed tests/test-runner/cmd/ to tests/test-runner/bin/ to match install location name. * Removed last traces of the --enable-debug-dmu-tx configure options which was retired some time ago. Reviewed-by: Giuseppe Di Natale <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6509
* Add corruption failure option to zinject(8)Don Brady2017-08-141-0/+2
| | | | | | | | | | | Added a 'corrupt' error option that will flip a bit in the data after a read operation. This is useful for generating checksum errors at the device layer (in a mirror config for example). It is also used to validate the diagnosis of checksum errors from the zfs diagnosis engine. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #6345
* Native Encryption for ZFS on LinuxTom Caputi2017-08-1430-127/+978
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change incorporates three major pieces: The first change is a keystore that manages wrapping and encryption keys for encrypted datasets. These commands mostly involve manipulating the new DSL Crypto Key ZAP Objects that live in the MOS. Each encrypted dataset has its own DSL Crypto Key that is protected with a user's key. This level of indirection allows users to change their keys without re-encrypting their entire datasets. The change implements the new subcommands "zfs load-key", "zfs unload-key" and "zfs change-key" which allow the user to manage their encryption keys and settings. In addition, several new flags and properties have been added to allow dataset creation and to make mounting and unmounting more convenient. The second piece of this patch provides the ability to encrypt, decyrpt, and authenticate protected datasets. Each object set maintains a Merkel tree of Message Authentication Codes that protect the lower layers, similarly to how checksums are maintained. This part impacts the zio layer, which handles the actual encryption and generation of MACs, as well as the ARC and DMU, which need to be able to handle encrypted buffers and protected data. The last addition is the ability to do raw, encrypted sends and receives. The idea here is to send raw encrypted and compressed data and receive it exactly as is on a backup system. This means that the dataset on the receiving system is protected using the same user key that is in use on the sending side. By doing so, datasets can be efficiently backed up to an untrusted system without fear of data being compromised. Reviewed by: Matthew Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #494 Closes #5769
* Simplify threads, mutexs, cvs and rwlocksBrian Behlendorf2017-08-111-79/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Simplify threads, mutexs, cvs and rwlocks * Update the zk_thread_create() function to use the same trick as Illumos. Specifically, cast the new pthread_t to a void pointer and return that as the kthread_t *. This avoids the issues associated with managing a wrapper structure and is safe as long as the callers never attempt to dereference it. * Update all function prototypes passed to pthread_create() to match the expected prototype. We were getting away this with before since the function were explicitly cast. * Replaced direct zk_thread_create() calls with thread_create() for code consistency. All consumers of libzpool now use the proper wrappers. * The mutex_held() calls were converted to MUTEX_HELD(). * Removed all mutex_owner() calls and retired the interface. Instead use MUTEX_HELD() which provides the same information and allows the implementation details to be hidden. In this case the use of the pthread_equals() function. * The kthread_t, kmutex_t, krwlock_t, and krwlock_t types had any non essential fields removed. In the case of kthread_t and kcondvar_t they could be directly typedef'd to pthread_t and pthread_cond_t respectively. * Removed all extra ASSERTS from the thread, mutex, rwlock, and cv wrapper functions. In practice, pthreads already provides the vast majority of checks as long as we check the return code. Removing this code from our wrappers help readability. * Added TS_JOINABLE state flag to pass to request a joinable rather than detached thread. This isn't a standard thread_create() state but it's the least invasive way to pass this information and is only used by ztest. TEST_ZTEST_TIMEOUT=3600 Chunwei Chen <[email protected]> Reviewed-by: Tom Caputi <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #4547 Closes #5503 Closes #5523 Closes #6377 Closes #6495
* Add libtpool (thread pools)Brian Behlendorf2017-08-094-6/+74
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | OpenZFS provides a library called tpool which implements thread pools for user space applications. Porting this library means the zpool utility no longer needs to borrow the kernel mutex and taskq interfaces from libzpool. This code was updated to use the tpool library which behaves in a very similar fashion. Porting libtpool was relatively straight forward and minimal modifications were needed. The core changes were: * Fully convert the library to use pthreads. * Updated signal handling. * lmalloc/lfree converted to calloc/free * Implemented portable pthread_attr_clone() function. Finally, update the build system such that libzpool.so is no longer linked in to zfs(8), zpool(8), etc. All that is required is libzfs to which the zcommon soures were added (which is the way it always should have been). Removing the libzpool dependency resulted in several build issues which needed to be resolved. * Moved zfeature support to module/zcommon/zfeature_common.c * Moved ratelimiting to to module/zfs/zfs_ratelimit.c * Moved get_system_hostid() to lib/libspl/gethostid.c * Removed use of cmn_err() in zcommon source * Removed dprintf_setup() call from zpool_main.c and zfs_main.c * Removed highbit() and lowbit() * Removed unnecessary library dependencies from Makefiles * Removed fletcher-4 kstat in user space * Added sha2 support explicitly to libzfs * Added highbit64() and lowbit64() to zpool_util.c Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6442
* Crash in dbuf_evict_one with DTRACE_PROBEgaurkuma2017-08-091-19/+39
| | | | | | | | | | | Update the dbuf__evict__one() tracepoint so that it can safely handle a NULL dmu_buf_impl_t pointer. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: loli10K <[email protected]> Signed-off-by: gaurkuma <[email protected]> Closes #6463
* Add line info and SET_ERROR() to ZFS debug logNed Bass2017-07-254-95/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Redefine the SET_ERROR macro in terms of __dprintf() so the error return codes get logged as both tracepoint events (if tracepoints are enabled) and as ZFS debug log entries. This also allows us to use the same definition of SET_ERROR() in kernel and user space. Define a new debug flag ZFS_DEBUG_SET_ERROR=512 that may be bitwise or'd into zfs_flags. Setting this flag enables both dprintf() and SET_ERROR() messages in the debug log. That is, setting ZFS_DEBUG_SET_ERROR and ZFS_DEBUG_DPRINTF|ZFS_DEBUG_SET_ERROR are equivalent (this was done for sake of simplicity). Leaving ZFS_DEBUG_SET_ERROR unset suppresses the SET_ERROR() messages which helps avoid cluttering up the logs. To enable SET_ERROR() logging, run: echo 1 > /sys/module/zfs/parameters/zfs_dbgmsg_enable echo 512 > /sys/module/zfs/parameters/zfs_flags Remove the zfs_set_error_class tracepoints event class since SET_ERROR() now uses __dprintf(). This sacrifices a bit of granularity when selecting individual tracepoint events to enable but it makes the code simpler. Include file, function, and line number information in debug log entries. The information is now added to the message buffer in __dprintf() and as a result the zfs_dprintf_class tracepoints event class was changed from a 4 parameter interface to a single parameter. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Ned Bass <[email protected]> Closes #6400
* Add callback for zfs_multihost_intervalOlaf Faaland2017-07-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Add a callback to wake all running mmp threads when zfs_multihost_interval is changed. This is necessary when the interval is changed from a very large value to a significantly lower one, while pools are imported that have the multihost property enabled. Without this commit, the mmp thread does not wake up and detect the new interval until after it has waited the old multihost interval time. A user monitoring mmp writes via the provided kstat would be led to believe that the changed setting did not work. Added a test in the ZTS under mmp to verify the new functionality is working. Added a test to ztest which starts and stops mmp threads, and calls into the code to signal sleeping mmp threads, to test for deadlocks or similar locking issues. Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Olaf Faaland <[email protected]> Closes #6387
* OpenZFS 8491 - uberblock on-disk padding to reserve space for smoothly ↵Serapheim Dimitropoulos2017-07-241-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | merging zpool checkpoint & MMP in ZFS The zpool checkpoint feature in DxOS added a new field in the uberblock. The Multi-Modifier Protection Pull Request from ZoL adds three new fields in the uberblock (Reference: https://github.com/zfsonlinux/zfs/pull/6279). As these two changes come from two different sources and once upstreamed and deployed will introduce an incompatibility with each other we want to upstream a change that will reserve the padding for both of them so integration goes smoothly and everyone gets both features. Porting Notes: Preserved MMP comments in uberblock struct. Authored by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Reviewed by: Olaf Faaland <[email protected]> Approved by: Gordon Ross <[email protected]> Ported-by: Giuseppe Di Natale <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8491 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d84fa5f Closes #6390
* Linux 4.13 compat: bio->bi_status and blk_status_tBrian Behlendorf2017-07-231-1/+91
| | | | | | | | | Commit torvalds/linux@4e4cbee9. The bio->bi_error field was replaced with bio->bi_status which is an enum that describes all possible error types. Reviewed-by: Chunwei Chen <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #6351
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