Datasets that are deeply nested (~100 levels) are impractical. We just
put a limit of 50 levels to newly created datasets. Existing datasets
should work without a problem.
The problem can be seen by attempting to create a dataset using the -p
option with many levels:
panic[cpu0]/thread=ffffff01cd282c20: BAD TRAP: type=8 (#df Double fault) rp=ffffffff
fffffffffbc3aa60 unix:die+100 ()
fffffffffbc3ab70 unix:trap+157d ()
ffffff00083d7020 unix:_patch_xrstorq_rbx+196 ()
ffffff00083d7050 zfs:dbuf_rele+2e ()
...
ffffff00083d7080 zfs:dsl_dir_close+32 ()
ffffff00083d70b0 zfs:dsl_dir_evict+30 ()
ffffff00083d70d0 zfs:dbuf_evict_user+4a ()
ffffff00083d7100 zfs:dbuf_rele_and_unlock+87 ()
ffffff00083d7130 zfs:dbuf_rele+2e ()
... The block above repeats once per directory in the ...
... create -p command, working towards the root ...
ffffff00083db9f0 zfs:dsl_dataset_drop_ref+19 ()
ffffff00083dba20 zfs:dsl_dataset_rele+42 ()
ffffff00083dba70 zfs:dmu_objset_prefetch+e4 ()
ffffff00083dbaa0 zfs:findfunc+23 ()
ffffff00083dbb80 zfs:dmu_objset_find_spa+38c ()
ffffff00083dbbc0 zfs:dmu_objset_find+40 ()
ffffff00083dbc20 zfs:zfs_ioc_snapshot_list_next+4b ()
ffffff00083dbcc0 zfs:zfsdev_ioctl+347 ()
ffffff00083dbd00 genunix:cdev_ioctl+45 ()
ffffff00083dbd40 specfs:spec_ioctl+5a ()
ffffff00083dbdc0 genunix:fop_ioctl+7b ()
ffffff00083dbec0 genunix:ioctl+18e ()
ffffff00083dbf10 unix:brand_sys_sysenter+1c9 ()
Porting notes:
* Added zfs_max_dataset_nesting module option with documentation.
* Updated zfs_rename_014_neg.ksh for Linux.
* Increase the zfs.sh stack warning to 15K. Enough time has passed
that 16K can be reasonably assumed to be the default value. It
was increased in the 3.15 kernel released in June of 2014.
Authored by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Garrett D'Amore <garrett@damore.org>
OpenZFS-issue: https://www.illumos.org/issues/9330
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/757a75aCloses#7681
Motivation
==========
The current space map encoding has the following disadvantages:
[1] Assuming 512 sector size each entry can represent at most 16MB for a segment.
This makes the encoding very inefficient for large regions of space.
[2] As vdev-wide space maps have started to be used by new features (i.e.
device removal, zpool checkpoint) we've started imposing limits in the
vdevs that can be used with them based on the maximum addressable offset
(currently 64PB for a top-level vdev).
New encoding
============
The layout can be found at space_map.h and it remains backwards compatible with
the old one. The introduced two-word entry format, besides extending the limits
imposed by the single-entry layout, also includes a vdev field and some extra
padding after its prefix.
The extra padding after the prefix should is reserved for future usage (e.g.
new prefixes for future encodings or new fields for flags). The new vdev field
not only makes the space maps more self-descriptive, but also opens the doors
for pool-wide space maps (expected to be used in the log spacemap project).
One final important note is that the number of bits used for vdevs is reduced
to 24 bits for blkptrs. That was decided as we don't know of any setups that
use more than 16M vdevs for the time being and we wanted to fit the vdev field
in the space map. In addition that gives us some extra bits in dva_t.
Other references:
=================
The new encoding is also discussed towards the end of the Log Space Map
presentation from 2017's OpenZFS summit.
Link: https://www.youtube.com/watch?v=jj2IxRkl5bQ
Authored by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@zfsmail.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Gordon Ross <gwr@nexenta.com>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/90a56e6d
OpenZFS-issue: https://www.illumos.org/issues/9238Closes#7665
CID 176037: Uninitialized scalar variable
This patch fixes an uninitialized variable defect caught by
coverity and introduced in 69830602
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes#7667
Currently, there is a bug where older send streams without the
DMU_BACKUP_FEATURE_LARGE_DNODE flag are not handled correctly.
The code in receive_object() fails to handle cases where
drro->drr_dn_slots is set to 0, which is always the case when the
sending code does not support this feature flag. This patch fixes
the issue by ensuring that that a value of 0 is treated as
DNODE_MIN_SLOTS.
Tested-by: DHE <git@dehacked.net>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes#7617Closes#7662
This patch fixes two problems with the encryption code. First, the
current code does not correctly prohibit the DMU from updating
dn_maxblkid during object truncation within a raw receive. This
usually only causes issues when the truncating DRR_FREE record is
aggregated with DRR_FREE records later in the receive, so it is
relatively hard to hit.
Second, this patch fixes a security issue where reading blocks
within an encrypted object did not guarantee that the dnode block
itself had ever been verified against its MAC. Usually the
verification happened anyway when the bonus buffer was read, but
some use cases (notably zvols) might never perform the check.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes#7632
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 <serapheim.dimitro@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Richard Lowe <richlowe@richlowe.net>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
OpenZFS-issue: https://illumos.org/issues/9166
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7159fdb8Closes#7570
ms_shift can be incorrectly changed changed in MOS config for
indirect vdevs that have been historically expanded
According to spa_config_update() we expect new vdevs to have
vdev_ms_array equal to 0 and then we go ahead and set their metaslab
size. The problem is that indirect vdevs also have vdev_ms_array == 0
because their metaslabs are destroyed once their removal is done.
As a result, if a vdev was expanded and then removed may have its
ms_shift changed if another vdev was added after its removal.
Fortunately this behavior does not cause any type of crash or bad
behavior in the kernel but it can confuse zdb and anyone doing any kind
of analysis of the history of the pools.
Authored by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@zfsmail.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Prashanth Sreenivasa <pks@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Ported-by: Tim Chase <tim@chase2k.com>
OpenZFS-commit: https://github.com/openzfs/openzfs/pull/651
OpenZFS-issue: https://illumos.org/issues/9591a
External-issue: DLPX-58879
Closes#7644
For zio taskq's which have multiple instances (e.g. z_rd_int_0,
z_rd_int_1, etc), each one has a unique name (the _0, _1, _2 suffix).
This makes performance analysis more difficult, because by default,
`perf` includes the thread name (which is the same as the taskq name) in
the stack trace. This means that we get 8 different stacks, all of
which are doing the same thing, but are executed from different taskq's.
We should remove the suffix of the taskq name, so that all the
read-interrupt threads are named z_rd_int.
Note that we already support multiple taskq's with the same name. This
happens when there are multiple pools. In this case the taskq has a
different tq_instance, which shows up in /proc/spl/taskq-all.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed-by: Giuseppe Di Natale <guss80@gmail.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes#7646
The blk_queue_stackable() function was replaced in the 4.14 kernel
by queue_is_rq_based(), commit torvalds/linux@5fdee212. This change
resulted in the default elevator being used which can negatively
impact performance.
Rather than adding additional compatibility code to detect the
new interface unconditionally attempt to set the elevator. Since
we expect this to fail for block devices without an elevator the
error message has been moved in to zfs_dbgmsg().
Finally, it was observed that the elevator_change() was removed
from the 4.12 kernel, commit torvalds/linux@c033269. Update the
comment to clearly specify which are expected to export the
elevator_change() symbol.
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7645
Commit torvalds/linux@95582b0 changes the inode i_atime, i_mtime,
and i_ctime members form timespec's to timespec64's to make them
2038 safe. As part of this change the current_time() function was
also updated to return the timespec64 type.
Resolve this issue by introducing a new inode_timespec_t type which
is defined to match the timespec type used by the inode. It should
be used when working with inode timestamps to ensure matching types.
The timestruc_t type under Illumos was used in a similar fashion but
was specified to always be a timespec_t. Rather than incorrectly
define this type all timespec_t types have been replaced by the new
inode_timespec_t type.
Finally, the kernel and user space 'sys/time.h' headers were aligned
with each other. They define as appropriate for the context several
constants as macros and include static inline implementation of
gethrestime(), gethrestime_sec(), and gethrtime().
Reviewed-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7643
This patch simply adds an ASSERT that confirms that the last
decrypting reference on a dataset waits until the dataset is
no longer dirty. This should help to debug issues where the
ZIO layer cannot find encryption keys after a dataset has been
disowned.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes#7637
This patch adds tunables for modifying the maximum memory limit and
maximum instruction limit that can be specified when running a channel
program.
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov
Reviewed-by: Sara Hartse <sara.hartse@delphix.com>
Signed-off-by: John Gallagher <john.gallagher@delphix.com>
External-issue: LX-1085
Closes#7618
Added support for the bops->check_events() interface which was
added in the 2.6.38 kernel to replace bops->media_changed().
Fully implementing this functionality allows the volume resize
code to rely on revalidate_disk(), which is the preferred
mechanism, and removes the need to use check_disk_size_change().
In order for bops->check_events() to lookup the zvol_state_t
stored in the disk->private_data the zvol_state_lock needs to
be held. Since the check events interface may poll the mutex
has been converted to a rwlock for better concurrently. The
rwlock need only be taken as a writer in the zvol_free() path
when disk->private_data is set to NULL.
The configure checks for the block_device_operations structure
were consolidated in a single kernel-block-device-operations.m4
file.
The ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS configure checks
and assoicated dead code was removed. This interface was added
to the 2.6.28 kernel which predates the oldest supported 2.6.32
kernel and will therefore always be available.
Updated maximum Linux version in META file. The 4.17 kernel
was released on 2018-06-03 and ZoL is compatible with the
finalized kernel.
Reviewed-by: Boris Protopopov <boris.protopopov@actifio.com>
Reviewed-by: Sara Hartse <sara.hartse@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7611
The zfs_dbuf_evict_key TSD (thread-specific data) is not necessary -
we can instead pass a flag down in a few places to prevent recursive
dbuf eviction. Making this change has 3 benefits:
1. The code semantics are easier to understand.
2. On Linux, performance is improved, because creating/removing
TSD values (by setting to NULL vs non-NULL) is expensive, and
we do it very often.
3. According to Nexenta, the current semantics can cause a
deadlock when concurrently calling dmu_objset_evict_dbufs()
(which is rare today, but they are working on a "parallel
unmount" change that triggers this more easily):
Porting Notes:
* Minor conflict with OpenZFS 9337 which has not yet been ported.
Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9577
OpenZFS-commit: https://github.com/openzfs/openzfs/pull/645
External-issue: DLPX-58547
Closes#7602
In the case where the pool is loaded without the crypto
keys necessary to playback the intent log, and log device
removal is attempted, a generic busy message is received.
Change the message to inform the user that the datasets
must be mounted.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tom Caputi <tcaputi@datto.com>
Signed-off-by: Paul Zuchowski <pzuchowski@datto.com>
Closes#7518
In the new aggsum counters the CPU_SEQID macro should be surrounded by
kpreempt_disable)() and kpreempt_enable() calls to prevent a Linux
kernel BUG warning. The addsum_add() function use the cpuid to
minimize lock contention when selecting a bucket, after selection
the bucket is protected by a mutex and it is safe to reschedule the
process to a different processor at any time.
Reviewed-by: Matthew Thode <prometheanfire@gentoo.org>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7609Closes#7610
If sa_build_index() encounters a corrupt buffer, don't panic.
Add info to zfs ring buffer and return EIO. This allows for a cleaner
error recovery path.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Issue #6500Closes#7487
This patch fixes an issue where l2arc_read_done() would always
write data to b_pabd, even if raw encrypted data was requested.
This only occured in cases where the L2ARC device had a different
ashift than the main pool.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes#7586Closes#7593
This patch fixes a small bug found where receive_spill() sometimes
attempted to decrypt spill blocks when doing a raw receive. In
addition, this patch fixes another small issue in arc_buf_fill()'s
error handling where a decryption failure (which could be caused by
the first bug) would attempt to set the arc header's IO_ERROR flag
without holding the header's lock.
Reviewed-by: Matthew Thode <prometheanfire@gentoo.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes#7564Closes#7584Closes#7592
In pursuit of improving performance on multi-core systems, we should
implements fanned out counters and use them to improve the performance of
some of the arc statistics. These stats are updated extremely frequently,
and can consume a significant amount of CPU time.
Authored by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@joyent.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Ported-by: Paul Dagnelie <pcd@delphix.com>
OpenZFS-issue: https://www.illumos.org/issues/8484
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7028a8b92b7
Issue #3752Closes#7462
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 <faaland1@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Richard Elling <Richard.Elling@RichardElling.com>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes#7331Closes#7563
txg_kick() fails to see that we are quiescing, forcing transactions to
their next stages without leaving them accumulate changes
Creating a fragmented pool in a DCenter VM and continuously writing to it with
multiple instances of randwritecomp, we get the following output from txg.d:
0ms 311MB in 4114ms (95% p1) 75MB/s 544MB (76%) 336us 153ms 0ms
0ms 8MB in 51ms ( 0% p1) 163MB/s 474MB (66%) 129us 34ms 0ms
0ms 366MB in 4454ms (93% p1) 82MB/s 572MB (79%) 498us 20ms 0ms
0ms 406MB in 5212ms (95% p1) 77MB/s 591MB (82%) 661us 37ms 0ms
0ms 340MB in 5110ms (94% p1) 66MB/s 622MB (86%) 1048us 41ms 1ms
0ms 3MB in 61ms ( 0% p1) 51MB/s 419MB (58%) 33us 0ms 0ms
0ms 361MB in 3555ms (88% p1) 101MB/s 542MB (75%) 335us 40ms 0ms
0ms 356MB in 4592ms (92% p1) 77MB/s 561MB (78%) 430us 89ms 1ms
0ms 11MB in 129ms (13% p1) 90MB/s 507MB (70%) 222us 15ms 0ms
0ms 281MB in 2520ms (89% p1) 111MB/s 542MB (75%) 334us 42ms 0ms
0ms 383MB in 3666ms (91% p1) 104MB/s 557MB (77%) 411us 133ms 0ms
0ms 404MB in 5757ms (94% p1) 70MB/s 635MB (88%) 1274us 123ms 2ms
4ms 367MB in 4172ms (89% p1) 88MB/s 556MB (77%) 401us 51ms 0ms
0ms 42MB in 470ms (44% p1) 90MB/s 557MB (77%) 412us 43ms 0ms
0ms 261MB in 2273ms (88% p1) 114MB/s 556MB (77%) 407us 27ms 0ms
0ms 394MB in 3646ms (85% p1) 108MB/s 552MB (77%) 393us 304ms 0ms
0ms 275MB in 2416ms (89% p1) 113MB/s 510MB (71%) 200us 53ms 0ms
0ms 9MB in 53ms ( 0% p1) 169MB/s 483MB (67%) 140us 100ms 1ms
The TXGs that are getting synced and don't have lots of changes are pushed by
txg_kick() which basically forces the current open txg to get to the quiesced
state:
if (tx->tx_syncing_txg == 0 &&
tx->tx_quiesce_txg_waiting <= tx->tx_open_txg &&
tx->tx_sync_txg_waiting <= tx->tx_synced_txg &&
tx->tx_quiesced_txg <= tx->tx_synced_txg) {
tx->tx_quiesce_txg_waiting = tx->tx_open_txg + 1;
cv_broadcast(&tx->tx_quiesce_more_cv);
}
The problem is that the above code doesn't check if we are currently quiescing
anything (only if a quiesce or a sync has been requested, ..etc) so the
following scenario can happen:
1] We have an open txg A that had enough dirty data (more than
zfs_dirty_data_sync) and it was pushed to the quiesced state, and opened
a new txg B. No txg is currently being synced.
2] Immediately after the opening of B, txg_kick() was run by some other write
(and because of A's dirty data) and saw that we are not currently syncing
any txg and no one has requested quiescing so it requests one by bumping
tx_quiesce_txg_waiting and broadcasts the quiesce thread.
3] The quiesce thread just passed txg A to be synced and sees that a quiescing
request has been sent to it so it immediately grabs B without letting it
gather enough data, putting it in a quiesced state and opening a new txg C.
In this scenario txg B, is an example of how the entries of interest show up in
the txg.d output.
Ideally we would like txg_kick() to get triggered only when we are sure that
we are not syncing AND not quiescing any txg. This way we can kick an open TXG
to the quiescing state when we are sure that there is nothing going on and we
would benefit from the different states running concurrently.
Authored by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed by: Andriy Gapon <avg@FreeBSD.org>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9464
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/1cd7635bCloses#7587
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 <pavel.zakharov@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9235
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d2b1e44Closes#7532
For the null pointer issue shown below, the solution is to initialize the
contents of the object before changing its type, so that concurrent accessors
will see it as non-zapified until it is ready for access via the ZAP.
BAD TRAP: type=e (#pf Page fault) rp=ffffff00ff520440 addr=20 occurred
in module "zfs" due to a NULL pointer dereference
ffffff00ff520320 unix:die+df ()
ffffff00ff520430 unix:trap+dc0 ()
ffffff00ff520440 unix:cmntrap+e6 ()
ffffff00ff520590 zfs:zap_leaf_lookup+46 ()
ffffff00ff520640 zfs:fzap_lookup+a9 ()
ffffff00ff5206e0 zfs:zap_lookup_norm+111 ()
ffffff00ff520730 zfs:zap_contains+42 ()
ffffff00ff520760 zfs:dsl_dataset_has_resume_receive_state+47 ()
ffffff00ff520900 zfs:get_receive_resume_stats+3e ()
ffffff00ff520a90 zfs:dsl_dataset_stats+262 ()
ffffff00ff520ac0 zfs:dmu_objset_stats+2b ()
ffffff00ff520b10 zfs:zfs_ioc_objset_stats_impl+64 ()
ffffff00ff520b60 zfs:zfs_ioc_objset_stats+33 ()
ffffff00ff520bd0 zfs:zfs_ioc_dataset_list_next+140 ()
ffffff00ff520c80 zfs:zfsdev_ioctl+4d7 ()
ffffff00ff520cc0 genunix:cdev_ioctl+39 ()
ffffff00ff520d10 specfs:spec_ioctl+60 ()
ffffff00ff520da0 genunix:fop_ioctl+55 ()
ffffff00ff520ec0 genunix:ioctl+9b ()
ffffff00ff520f10 unix:brand_sys_sysenter+1c9 ()
Porting Notes:
* DMU_OT_BYTESWAP conditional in zap_lockdir_impl() kept.
Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9329
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/e8e0f97Closes#7578
The ZAP code was written before we allowed c99 in the Solaris kernel. We
should change it to take advantage of being able to declare variables where
they are first used. This reduces variable scope and means less scrolling
to find the type of variables.
Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Steve Gonczi <steve.gonczi@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9328
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/76ead05Closes#7578
Update bdev_capacity to have wholedisk vdevs query the
size of the underlying block device (correcting for the size
of the efi parition and partition alignment) and therefore detect
expanded space.
Correct vdev_get_stats_ex so that the expandsize is aligned
to metaslab size and new space is only reported if it is large
enough for a new metaslab.
Reviewed by: Don Brady <don.brady@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: John Wren Kennedy <jwk404@gmail.com>
Signed-off-by: sara hartse <sara.hartse@delphix.com>
External-issue: LX-165
Closes#7546
Issue #7582
This fixes an assert in vdev_queue_change_io_priority():
VERIFY3(zio->io_priority < ZIO_PRIORITY_NUM_QUEUEABLE) failed (7 < 6)
PANIC at vdev_queue.c:832:vdev_queue_change_io_priority()
Reviewed-by: Tom Caputi <tcaputi@datto.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes#7566Closes#7542
Minimal changes required to integrate the SPL sources in to the
ZFS repository build infrastructure and packaging.
Build system and packaging:
* Renamed SPL_* autoconf m4 macros to ZFS_*.
* Removed redundant SPL_* autoconf m4 macros.
* Updated the RPM spec files to remove SPL package dependency.
* The zfs package obsoletes the spl package, and the zfs-kmod
package obsoletes the spl-kmod package.
* The zfs-kmod-devel* packages were updated to add compatibility
symlinks under /usr/src/spl-x.y.z until all dependent packages
can be updated. They will be removed in a future release.
* Updated copy-builtin script for in-kernel builds.
* Updated DKMS package to include the spl.ko.
* Updated stale AUTHORS file to include all contributors.
* Updated stale COPYRIGHT and included the SPL as an exception.
* Renamed README.markdown to README.md
* Renamed OPENSOLARIS.LICENSE to LICENSE.
* Renamed DISCLAIMER to NOTICE.
Required code changes:
* Removed redundant HAVE_SPL macro.
* Removed _BOOT from nvpairs since it doesn't apply for Linux.
* Initial header cleanup (removal of empty headers, refactoring).
* Remove SPL repository clone/build from zimport.sh.
* Use of DEFINE_RATELIMIT_STATE and DEFINE_SPINLOCK removed due
to build issues when forcing C99 compilation.
* Replaced legacy ACCESS_ONCE with READ_ONCE.
* Include needed headers for `current` and `EXPORT_SYMBOL`.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
TEST_ZIMPORT_SKIP="yes"
Closes#7556
Merge a minimal version of the zfsonlinux/spl repository in to the
zfsonlinux/zfs repository. Care was taken to prevent file conflicts
when merging and to preserve the spl repository history. The spl
kernel module remains under the GPLv2 license as documented by the
additional THIRDPARTYLICENSE.gplv2 file.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit removes everything from the repository except the core
SPL implementation for Linux. Those files which remain have been
moved to non-conflicting locations to facilitate the merge.
The README.md and associated files have been updated accordingly.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Device removal allocates a new location for each allocated segment on
the disk that's being removed. Each allocation results in one entry in
the mapping table, which maps from old location + length to new
location. When a fragmented disk is removed, this can result in a large
number of mapping entries, and thus a large amount of memory consumed by
the mapping table. In the worst real-world cases, we've seen around 1GB
of RAM per 1TB of storage removed.
We can improve on this situation by allocating larger segments, which
span across both allocated and free regions of the device being removed.
By including free regions in the allocation (and thus mapping), we
reduce the number of mapping entries. For example, if we have a 4K
allocation followed by 1K free and then 4K allocated, we would allocate
4+1+4 = 9KB, and then move the entire region (including allocated and
free parts). In this case we used one mapping where previously we would
have used two, but often the ratio is much higher (up to 20:1 in
real-world use). We then need to mark the regions that were free on the
removing device as free in the new locations, and also obsolete in the
mapping entry.
This method preserves the fragmentation of the removing device, rather
than consolidating its allocated space into a small number of chunks
where possible. But it results in drastic reduction of memory used by
the mapping table - around 20x in the most-fragmented cases.
In the most fragmented real-world cases, this reduces memory used by the
mapping from ~1GB to ~50MB of RAM per 1TB of storage removed. Less
fragmented cases will typically also see around 50-100MB of RAM per 1TB
of storage.
Porting notes:
* Add the following as module parameters:
* zfs_condense_indirect_vdevs_enable
* zfs_condense_max_obsolete_bytes
* Document the following module parameters:
* zfs_condense_indirect_vdevs_enable
* zfs_condense_max_obsolete_bytes
* zfs_condense_min_mapping_bytes
Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
OpenZFS-issue: https://illumos.org/issues/9486
OpenZFS-commit: https://github.com/ahrens/illumos/commit/07152e142e44c
External-issue: DLPX-57962
Closes#7536
These changes were added to help debug issue #9187.
Essentially, in the original bug, vdev_validate() seems to fails in
vdev_label_read_config() and prints "failed reading config". This could
happen because either:
1. The labels are actually corrupt and zio_wait() fails for all of them
2. The labels were discarded because they didn't pass the txg check.
Beyond 9187, having debug info when case 2 happens could be useful in
other scenarios, such as zpool import.
Authored by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Prashanth Sreenivasa <pks@delphix.com>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Approved by: Matt Ahrens <mahrens@delphix.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9189
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/f6af1b7Closes#7533
Add vdev_print_tree() in spa_check_for_missing_logs() when some log
devices are missing to ease debugging
Authored by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Approved by: Robert Mustacchi <rm@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9191
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c5c02e5Closes#7531
ztest failed with uncorrectable IO error despite having the fix for
7163. Both sides of the mirror have CANT_OPEN_BAD_LABEL, which also
distinguishes it from that issue.
Definitely seems like a racing condition between the vdev_validate
and spa_sync:
1. Thread A (spa_sync): vdev label is updated to latest txg
2. Thread B (vdev_validate): vdev label's txg is compared to
spa_last_synced_txg and is ahead.
3. Thread A (spa_sync): spa_last_synced_txg is updated to latest txg.
Solution: do not check txg in vdev_validate unless config lock is held.
Authored by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Approved by: Robert Mustacchi <rm@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9187
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/805fda72Closes#7529
Generated when building on Ubuntu 18.04. Also ignore the new
dynamically generated zfs-mount-generator.8 man page, and the
module/.cache.mk file.
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7534
Callbacks provided for module parameters are executed both
after the module is loaded, when a user alters it via sysfs, e.g
echo bar > /sys/modules/zfs/parameters/foo
as well as when the module is loaded with an argument, e.g.
modprobe zfs foo=bar
In the latter case, the init functions likely have not run yet,
including spa_init() which initializes the namespace lock so it is safe
to use.
Instead of immediately taking the namespace lock and attemping to
iterate over initialized spa structures, check whether spa_mode_global
is nonzero. This is set by spa_init() after it has initialized the
namespace lock.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Closes#7496Closes#7521
The zfs_deadman_failmode, zfs_deadman_ziotime_ms and
zfs_deadman_synctime_ms paramaters are stored per-pool. However,
only the zfs_deadman_failmode updates the per-pool state when it's
change. This patch gives adds the same behavior to the other two
for consistency.
Also, in all 3 three cases, only update the per-pool parameters
if spa_init() has actually been called in order to avoid panicking
when trying to take a lock on the spa_namespace_lock mutex.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes#7499
Clear vdev_faulted if ZPOOL_CONFIG_AUX_STATE is not set to "external"
ZoL supports "zpool export -f" (force fault), which can be combined
with "-t" (temporary fault; don't persist across export/import) and
causes a MOS configuration to be set with ZPOOL_CONFIG_FAULTED=1
and without ZFS_CONFIG_AUX_STATE set at all. In this case, the
previously-offlined vdev should be imported in an on-line state and.
Clearing the "vdev_faulted" flag causes the import to treat the
device as on-line. Typically, resilver will catch it up based on
its DTL.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes#7459
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 <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Andrew Stormont <andyjstormont@gmail.com>
Approved by: Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
OpenZFS-issue: https://illumos.org/issues/9075
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/619c0123Closes#7459
Currently `zdb` consistently fails to examine non-idle pools as it
fails during the `spa_load()` process. The main problem seems to be
that `spa_load_verify()` fails as can be seen below:
$ sudo zdb -d -G dcenter
zdb: can't open 'dcenter': I/O error
ZFS_DBGMSG(zdb):
spa_open_common: opening dcenter
spa_load(dcenter): LOADING
disk vdev '/dev/dsk/c4t11d0s0': best uberblock found for spa dcenter. txg 40824950
spa_load(dcenter): using uberblock with txg=40824950
spa_load(dcenter): UNLOADING
spa_load(dcenter): RELOADING
spa_load(dcenter): LOADING
disk vdev '/dev/dsk/c3t10d0s0': best uberblock found for spa dcenter. txg 40824952
spa_load(dcenter): using uberblock with txg=40824952
spa_load(dcenter): FAILED: spa_load_verify failed [error=5]
spa_load(dcenter): UNLOADING
This change makes `spa_load_verify()` a dryrun when ran from
`zdb`. This is done by creating a global flag in zfs and then setting
it in `zdb`.
Authored by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Andy Stormont <astormont@racktopsystems.com>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
OpenZFS-issue: https://illumos.org/issues/8962
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/180ad792Closes#7459
Problem
=======
When we fail to open or import a storage pool, we typically don't
get any additional diagnostic information, just "no pool found" or
"can not import".
While there may be no additional user-consumable information, we should
at least make this situation easier to debug/diagnose for developers
and support. For example, we could start by using `zfs_dbgmsg()`
to log each thing that we try when importing, and which things
failed. E.g. "tried uberblock of txg X from label Y of device Z". Also,
we could log each of the stages that we go through in `spa_load_impl()`.
Solution
========
Following the cleanup to `spa_load_impl()`, debug messages have been
added to every point of failure in that function. Additionally,
debug messages have been added to strategic places, such as
`vdev_disk_open()`.
Authored by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Andrew Stormont <andyjstormont@gmail.com>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
OpenZFS-issue: https://illumos.org/issues/8961
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/418079e0Closes#7459
Authored by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Richard Lowe <richlowe@richlowe.net>
Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Porting Notes:
* Added tuning to man page.
* Test case changes dropped, default behavior unchanged.
OpenZFS-issue: https://www.illumos.org/issues/9256
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/32356b3c56Closes#7470
Creating a pool with a temporary name fails when we also specify custom
dataset properties: this is because we mistakenly call
zfs_set_prop_nvlist() on the "real" pool name which, as expected,
cannot be found because the SPA is present in the namespace with the
temporary name.
Fix this by specifying the correct pool name when setting the dataset
properties.
Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes#7502Closes#7509
Commit 7fab6361 inadvertently disabled the MMP test cases by creating
and not removing an /etc/hostid file in the new zpool_split_props test
case. When the file exists the ZTS skips the entire MMP test group
rather than modify what may be a system which is already configured.
Update the test case to remove the file.
Additionally, because the MMP tests were disabled a regression slipped
in as part of commit 9eb7b46ed0. Fix it.
Reviewed-by: Tim Chase <tim@chase2k.com>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: loli10K <ezomori.nozomu@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7514
9421 zdb should detect and print out the number of "leaked" objects
9422 zfs diff and zdb should explicitly mark objects that are on
the deleted queue
It is possible for zfs to "leak" objects in such a way that they are not
freed, but are also not accessible via the POSIX interface. As the only
way to know that this is happened is to see one of them directly in a
zdb run, or by noting unaccounted space usage, zdb should be enhanced to
count these objects and return failure if some are detected.
We have access to the delete queue through the zfs_get_deleteq function;
we should call it in dump_znode to determine if the object is on the
delete queue. This is not the most efficient possible method, but it is
the simplest to implement, and should suffice for the common case where
there few objects on the delete queue.
Also zfs diff and zdb currently traverse every single dnode in a dataset
and tries to figure out the path of the object by following it's parent.
When an object is placed on the delete queue, for all practical purposes
it's already discarded, it's parent might not exist anymore, and another
object might now have the object number that belonged to the parent.
While all of the above makes sense, when trying to figure out the path
of an object that is on the delete queue, we can run into issues where
either it is impossible to determine the path because the parent is
gone, or another dnode has taken it's place and thus we are returned a
wrong path.
We should therefore avoid trying to determine the path of an object on
the delete queue and mark the object itself as being on the delete queue
to avoid confusion. To achieve this, we currently have two ideas:
1. When putting an object on the delete queue, change it's parent object
number to a known constant that means NULL.
2. When displaying objects, first check if it is present on the delete
queue.
Authored by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Approved by: Matt Ahrens <mahrens@delphix.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9421
OpenZFS-issue: https://illumos.org/issues/9422
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/45ae0dd9caCloses#7500
While expanding stored pools, we ran into a panic using an old pool.
Steps to reproduce:
$ sudo zpool create -o version=2 test c2t1d0
$ sudo cp /etc/passwd /test/foo
$ sudo zpool attach test c2t1d0 c2t2d0
We'll get this panic:
ffffff000fc0e5e0 unix:real_mode_stop_cpu_stage2_end+b27c ()
ffffff000fc0e6f0 unix:trap+dc8 ()
ffffff000fc0e700 unix:cmntrap+e6 ()
ffffff000fc0e860 zfs:dsl_scan_visitds+1ff ()
ffffff000fc0ea20 zfs:dsl_scan_visit+fe ()
ffffff000fc0ea80 zfs:dsl_scan_sync+1b3 ()
ffffff000fc0eb60 zfs:spa_sync+435 ()
ffffff000fc0ec20 zfs:txg_sync_thread+23f ()
ffffff000fc0ec30 unix:thread_start+8 ()
The problem is a bad trap accessing a NULL pointer. We're looking for
the dp_origin_snap of a dsl_pool_t, but version 2 didn't have that. The
system will go into a reboot loop at this point, and the dump won't be
accessible except by removing the cache file from within the recovery
environment.
This impacts any sort of scrub or resilver on version <11 pools, e.g.:
$ zpool create -o version=10 test c2t1d0
$ zpool scrub test
Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Andriy Gapon <avg@FreeBSD.org>
Reviewed by: Igor Kozhukhov <igor@dilos.org>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://www.illumos.org/issues/9443
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/010eed29Closes#7501
This patch adds the ability for zinject to trigger decryption
and authentication faults in the ZIO and ARC layers. This
functionality is exposed via the new "decrypt" error type, which
may be provided for "data" object types.
This patch also refactors some of the core encryption / decryption
functions so that they have consistent prototypes, handle errors
consistently, and do not have unused arguments.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes#7474
As of RHEL 7.5 the mainline fops.iterate() method was added to
the file_operations structure and is correctly detected by the
configure script.
Normally this is what we want, but in order to maintain KABI
compatibility the RHEL change additionally does the following:
* Requires that callers intending to use this extended interface
set the FMODE_KABI_ITERATE flag on the file structure when
opening the directory.
* Adds the fops.iterate() method to the end of the structure,
without removing fops.readdir().
This change updates the configure check to ignore the RHEL 7.5+
variant of fops.iterate() when detected. Instead fallback to
the fops.readdir() interface which will be available.
Finally, add the 'zpl_' prefix to the directory context wrappers
to avoid colliding with the kernel provided symbols when both
the fops.iterate() and fops.readdir() are provided by the kernel.
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7460Closes#7463
This patch fixes the same issue which was previously addressed in
6051. The variable "inst_num" was of the incorrect type and
"atomic_inc_32_nv()" could cause an overflow damaging its neighbor.
Cast the return value of atomic_inc_32_nv() to Cpa32U.
Fix a few types for num_inst for clarity.
Reviewed-by: Weigang Li <weigang.li@intel.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#7468
