Commit Graph

2283 Commits

Author SHA1 Message Date
Brian Behlendorf 4d6369c167 Illumos 5039 - ztest should default to larger device sizes
5039 ztest should default to larger device sizes
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/5039
  https://github.com/illumos/illumos-gate/commit/539eed8

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-11 14:10:31 -08:00
Brian Behlendorf b870c7e5f4 Revert "Illumos 3749 - zfs event processing should work on R/O root filesystems"
This reverts commit b47637ecdc which
introduced a regression in ztest.

$ ./cmd/ztest/ztest -V
5 vdevs, 7 datasets, 23 threads, 300 seconds...
*** Error in `/rpool/home/behlendo/src/git/zfs/cmd/ztest/.libs/lt-ztest':
double free or corruption (fasttop): 0x0000000000d339f0 ***
2016-01-11 14:10:30 -08:00
Brian Behlendorf 928c58dd0f Fix vn_rdwr() compiler warning
kernel.c: In function 'vn_rdwr':
kernel.c:736:8: warning: unused variable 'status' [-Wunused-variable]

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-11 14:10:30 -08:00
Brian Behlendorf b858767a31 Fix 'prevsnap property' build failure
Fix build failure accidentally introduced by 1715493.  This only
results in a failure when debugging is disabled.

dsl_dataset.c: In function 'dsl_dataset_stats':
dsl_dataset.c:1698:45: error: 'dp' undeclared (first use in this function)

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-11 13:35:40 -08:00
Matthew Ahrens 1715493f38 Illumos 4929 - want prevsnap property
4929 want prevsnap property
Reviewed by: Adam Leventhal <adam.leventhal@delphix.com>
Reviewed by: Matt Amdur <matt.amdur@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Reviewed by: Boris Protopopov <bprotopopov@hotmail.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@omniti.com>

References:
  https://www.illumos.org/issues/4929
  https://github.com/illumos/illumos-gate/commit/b461c74

Porting notes:
- [include/sys/fs/zfs.h]
  - f67d70 Create an 'overlay' property
  - 11b9ec Add full SELinux support
- [fs/zfs/dsl_dataset.c]
  - This increases the stack size of dsl_dataset_stats() but
    nothing has been changed until this is shown to be an issue.

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-11 11:58:26 -08:00
Matthew Ahrens 9867e8be2a Illumos 4891 - want zdb option to dump all metadata
4891 want zdb option to dump all metadata
Reviewed by: Sonu Pillai <sonu.pillai@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Garrett D'Amore <garrett@damore.org>

We'd like a way for zdb to dump metadata in a machine-readable
format, so that we can bring that back from a customer site for
in-house diagnosis.  Think of it as a crash dump for zpools,
which can be used for post-mortem analysis of a malfunctioning
pool

References:
  https://www.illumos.org/issues/4891
  https://github.com/illumos/illumos-gate/commit/df15e41

Porting notes:
- [cmd/zdb/zdb.c]
  - a5778ea zdb: Introduce -V for verbatim import
  - In main() getopt 'opt' variable removed and the code was
    brought back in line with illumos.
- [lib/libzpool/kernel.c]
  - 1e33ac1 Fix Solaris thread dependency by using pthreads
  - f0e324f Update utsname support
  - 4d58b69 Fix vn_open/vn_rdwr error handling
  - In vn_open() allocate 'dumppath' on heap instead of stack
  - Properly handle 'dump_fd == -1' error path
  - Free 'realpath' after added vn_dumpdir_code block

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-11 11:36:54 -08:00
Marcel Telka f3c9dca093 Illumos 4638 - Panic in ZFS via rfs3_setattr()/rfs3_write(): dirtying snapshot!
4638 Panic in ZFS via rfs3_setattr()/rfs3_write(): dirtying snapshot!
Reviewed by: Alek Pinchuk <alek.pinchuk@nexenta.com>
Reviewed by: Ilya Usvyatsky <ilya.usvyatsky@nexenta.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Garrett D'Amore <garrett@damore.org>

References:
  https://www.illumos.org/issues/4638
  https://github.com/illumos/illumos-gate/commit/2144b12

Porting notes:
- [module/zfs/zfs_vnops.c]
  - 3558fd7 Prototype/structure update for Linux
  - 2cf7f52 Linux compat 2.6.39: mount_nodev()
  - Use zfs_is_readonly() wrapper
  - Remove first line of comment which doesn't apply

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-11 10:29:48 -08:00
nathancheek 53e0313506 Man page whitespace
Signed-off-by: nathancheek <myself@nathancheek.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4184
2016-01-11 09:55:50 -08:00
Will Andrews b47637ecdc Illumos 3749 - zfs event processing should work on R/O root filesystems
3749 zfs event processing should work on R/O root filesystems
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Approved by: Christopher Siden <christopher.siden@delphix.com>

References:
  https://www.illumos.org/issues/3749
  https://github.com/illumos/illumos-gate/commit/3cb69f7

Porting notes:
- [include/sys/spa_impl.h]
  - ffe9d38 Add generic errata infrastructure
  - 1421c89 Add visibility in to arc_read
- [include/sys/fm/fs/zfs.h]
  - 2668527 Add linux events
  - 6283f55 Support custom build directories and move includes
- [module/zfs/spa_config.c]
  - Updated spa_config_sync() to match illumos with the exception
    of a Linux specific block.

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-11 09:23:37 -08:00
Brian Behlendorf e9e3d31d2c Allow 16M send/recv blocks
Fix an off by one error introduced by fcff0f3 which triggers an
assertion when 16M blocks are used with send/recv.  This fix was
intentionally not folder in to the Illumos commit so it can be
easily cherry-picked by upstream.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-08 20:23:23 -05:00
Paul Dagnelie fcff0f35bd Illumos 5960, 5925
5960 zfs recv should prefetch indirect blocks
5925 zfs receive -o origin=
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

References:
  https://www.illumos.org/issues/5960
  https://www.illumos.org/issues/5925
  https://github.com/illumos/illumos-gate/commit/a2cdcdd

Porting notes:
- [lib/libzfs/libzfs_sendrecv.c]
  - b8864a2 Fix gcc cast warnings
  - 325f023 Add linux kernel device support
  - 5c3f61e Increase Linux pipe buffer size on 'zfs receive'
- [module/zfs/zfs_vnops.c]
  - 3558fd7 Prototype/structure update for Linux
  - c12e3a5 Restructure zfs_readdir() to fix regressions
- [module/zfs/zvol.c]
  - Function @zvol_map_block() isn't needed in ZoL
  - 9965059 Prefetch start and end of volumes
- [module/zfs/dmu.c]
  - Fixed ISO C90 - mixed declarations and code
  - Function dmu_prefetch() 'int i' is initialized before
    the following code block (c90 vs. c99)
- [module/zfs/dbuf.c]
  - fc5bb51 Fix stack dbuf_hold_impl()
  - 9b67f60 Illumos 4757, 4913
  - 34229a2 Reduce stack usage for recursive traverse_visitbp()
- [module/zfs/dmu_send.c]
  - Fixed ISO C90 - mixed declarations and code
  - b58986e Use large stacks when available
  - 241b541 Illumos 5959 - clean up per-dataset feature count code
  - 77aef6f Use vmem_alloc() for nvlists
  - 00b4602 Add linux kernel memory support

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-08 15:08:19 -08:00
Brian Behlendorf 00af2ff6f2 Add missing -V option to zdb
Add missing getopt specifier for `zdb -V` verbatim option and
set flag with correct bitwise operator.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-08 12:43:29 -08:00
Richard Sharpe c5d0287011 Fix casesensitivity=insensitive deadlock
When casesensitivity=insensitive is set for the
file system, we can deadlock in a rename if the user uses different case
for each path. For example rename("A/some-file.txt", "a/some-file.txt").

The simple test for this is:

1. mkdir some-dir in a ZFS file system
2. touch some-dir/some-file.txt
3. mv Some-dir/some-file.txt some-dir/some-other-file.txt

This last request deadlocks trying to relock the i_mutex on the inode for
the parent directory.

The solution is to use d_add_ci in zpl_lookup if we are on a file system
that has the casesensitivity=insensitive attribute set.

This patch checks if we are working on a case insensitive file system and if
so, allocates storage for the case insensitive name and passes it to
zfs_lookup and then calls d_add_ci instead of d_splice_alias.

The performance impact seems to be minimal even though we have introduced a
kmalloc and kfree in the lookup path.

The problem was found when running Microsoft's FSCT against Samba on top of
ZFS On Linux.

Signed-off-by: Richard Sharpe <realrichardsharpe@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4136
2016-01-08 11:05:07 -08:00
Hajo Möller 7cf2ffa020 Make arc_summary.py and dbufstat.py compatible with python3
To make arc_summary.py and dbufstat.py compatible with python3
some minor fixes were required, this was done automatically by
`2to3 -w arc_summary.py` and `2to3 -w dbufstat.py`.

Signed-off-by: Hajo Möller <dasjoe@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Reviewed-by: Richard Laager <rlaager@wiktel.com>
2016-01-07 17:09:59 -08:00
Matthew Ahrens 074348589b Illumos 3604 - zdb should print bpobjs more verbosely (fix zdb hang)
3604 zdb should print bpobjs more verbosely (fix zdb hang)
References:
  https://github.com/illumos/illumos-gate/commit/7706186
  https://www.illumos.org/issues/3604
  https://lists.freebsd.org/pipermail/svn-src-vendor/2015-August/002411.html
  https://lists.freebsd.org/pipermail/svn-src-head/2015-August/075195.html

Porting notes:
In ZoL "5810 zdb should print details of bpobj" was merged
prior to this change so it must be applied to the new location.

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-05 11:37:43 -08:00
Jeremy Jones b23ad7f350 Illumos 3139 - zdb dies when it tries to determine path of unlinked file
3139 zdb dies when it tries to determine path of unlinked file
Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com>
Reviewed by: Christopher Siden <chris.siden@delphix.com>
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

References:
  https://github.com/illumos/illumos-gate/commit/1ce39b5
  https://www.illumos.org/issues/3139

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-05 11:25:41 -08:00
Milan Jurik cfe86c01d5 Illumos 2077 - lots of unreachable breaks in illumos gate
2077 lots of unreachable breaks in illumos gate
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/2077
  https://github.com/illumos/illumos-gate/commit/33f5ff1

Porting notes:
- Only one file of the original patch applied to ZFS
- Minor formating change to align copyright block with upstream

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
2015-12-30 14:50:26 -08:00
Matthew Ahrens 37f8a8835a Illumos 5746 - more checksumming in zfs send
5746 more checksumming in zfs send
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Bayard Bell <buffer.g.overflow@gmail.com>
Approved by: Albert Lee <trisk@omniti.com>

References:
  https://www.illumos.org/issues/5746
  https://github.com/illumos/illumos-gate/commit/98110f0
  https://github.com/zfsonlinux/zfs/issues/905

Porting notes:
- Minor conflicts due to:
  - https://github.com/zfsonlinux/zfs/commit/2024041
  - https://github.com/zfsonlinux/zfs/commit/044baf0
  - https://github.com/zfsonlinux/zfs/commit/88904bb
- Fix ISO C90 warnings (-Werror=declaration-after-statement)
  - arc_buf_t *abuf;
  - dmu_buf_t *bonus;
  - zio_cksum_t cksum_orig;
  - zio_cksum_t *cksump;
- Fix format '%llx' format specifier warning
- Align message in zstreamdump safe_malloc() with upstream

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3611
2015-12-30 14:24:14 -08:00
Ned Bass 43b4935e53 Prevent SA length overflow
The function sa_update() accepts a 32-bit length parameter and
assigns it to a 16-bit field in sa_bulk_attr_t, potentially
truncating the passed-in value. This could lead to corrupt system
attribute (SA) records getting written to the pool. Add a VERIFY to
sa_update() to detect cases where overflow would occur. The SA length
is limited to 16-bit values by the on-disk format defined by
sa_hdr_phys_t.

The function zfs_sa_set_xattr() is vulnerable to this bug if the
unpacked nvlist of xattrs is less than 64k in size but the packed
size is greater than 64k. Fix this by appropriately checking the
size of the packed nvlist before calling sa_update(). Add error
handling to zpl_xattr_set_sa() to keep the cached list of SA-based
xattrs consistent with the data on disk.

Lastly, zfs_sa_set_xattr() calls dmu_tx_abort() on an assigned
transaction if sa_update() returns an error, but the DMU only allows
unassigned transactions to be aborted. Wrap the sa_update() call in a
VERIFY0, remove the transaction abort, and call dmu_tx_commit()
unconditionally. This is consistent practice with other callers
of sa_update().

Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Closes #4150
2015-12-30 13:20:12 -08:00
Chris Williamson 23de906c72 Illumos 5745 - zfs set allows only one dataset property to be set at a time
5745 zfs set allows only one dataset property to be set at a time
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Bayard Bell <buffer.g.overflow@gmail.com>
Reviewed by: Richard PALO <richard@NetBSD.org>
Reviewed by: Steven Hartland <killing@multiplay.co.uk>
Approved by: Rich Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/5745
  https://github.com/illumos/illumos-gate/commit/3092556

Porting notes:
- Fix the missing braces around initializer, zfs_cmd_t zc = {"\0"};
- Remove extra format argument in zfs_do_set()
- Declare at the top:
  - zfs_prop_t prop;
  - nvpair_t *elem;
  - nvpair_t *next;
  - int i;
- Additionally initialize:
  - int added_resv = 0;
  - zfs_prop_t prop = 0;
- Assign 0 install of NULL for uint64_t types.
  - zc->zc_nvlist_conf = '\0';
  - zc->zc_nvlist_src = '\0';
  - zc->zc_nvlist_dst = '\0';

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3574
2015-12-29 16:59:26 -08:00
Chunwei Chen f5f087eb88 Make xattr dir truncate and remove in one tx
We need truncate and remove be in the same tx when doing zfs_rmnode on xattr
dir. Otherwise, if we truncate and crash, we'll end up with inconsistent zap
object on the delete queue. We do this by skipping dmu_free_long_range and let
zfs_znode_delete to do the work.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4114
Issue #4052
Issue #4006
Issue #3018
Issue #2861
2015-12-28 09:48:26 -08:00
Chunwei Chen 29572ccdef Fix empty xattr dir causing lockup
During zfs_rmnode on a xattr dir, if the system crash just after
dmu_free_long_range, we would get empty xattr dir in delete queue. This would
cause blkid=0 be passed into zap_get_leaf_byblk when doing zfs_purgedir during
mount, and would try to do rw_enter on a wrong structure and cause system
lockup.

We fix this by returning ENOENT when blkid is zero in zap_get_leaf_byblk.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4114
Closes #4052
Closes #4006
Closes #3018
Closes #2861
2015-12-28 09:41:30 -08:00
Brian Behlendorf 2ebc7b72b3 Fix z_xattr_lock/z_teardown_lock inversion
There exists a lock inversion between the z_xattr_lock and the
z_teardown_lock.  Resolve this by taking the z_teardown_lock in
all registered xattr callbacks prior to taking the z_xattr_lock.
This ensures the locks are always taken is the same order thus
preventing a deadlock.  Note the z_teardown_lock is taken again
in zfs_lookup() and this is safe because the z_teardown lock is
a re-entrant read reader/writer lock.

* process-1
zpl_xattr_get -> Takes zp->z_xattr_lock
  __zpl_xattr_get
    zfs_lookup -> Takes zsb->z_teardown_lock in ZFS_ENTER macro

* process-2
zfs_ioc_recv -> Takes zsb->z_teardown_lock in zfs_suspend_fs()
  zfs_resume_fs
    zfs_rezget -> Takes zp->z_xattr_lock

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Closes #3943
Closes #3969
Closes #4121
2015-12-22 16:59:20 -08:00
Brian Behlendorf 228b461b56 Revert "Fix z_xattr_lock/z_teardown_lock lock inversion"
This reverts commit 6b32ef572f.
2015-12-22 16:58:43 -08:00
Brian Behlendorf 151f84e2c3 Fix ztest truncated cache file
Commit efc412b updated spa_config_write() for Linux 4.2 kernels to
truncate and overwrite rather than rename the cache file.  This is
the correct fix but it should have only been applied for the kernel
build.  In user space rename(2) is needed because ztest depends on
the cache file.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4129
2015-12-22 10:40:40 -08:00
Olaf Faaland 448d7aaabc Identify locks flagged by lockdep
When running a kernel with CONFIG_LOCKDEP=y, lockdep reports possible
recursive locking in some cases and possible circular locking dependency
in others, within the SPL and ZFS modules.

This patch uses a mutex type defined in SPL, MUTEX_NOLOCKDEP, to mark
such mutexes when they are initialized.  This mutex type causes
attempts to take or release those locks to be wrapped in lockdep_off()
and lockdep_on() calls to silence the dependency checker and allow the
use of lock_stats to examine contention.

For RW locks, it uses an analogous lock type, RW_NOLOCKDEP.

The goal is that these locks are ultimately changed back to type
MUTEX_DEFAULT or RW_DEFAULT, after the locks are annotated to reflect
their relationship (e.g. z_name_lock below) or any real problem with the
lock dependencies are fixed.

Some of the affected locks are:

tc_open_lock:
=============
This is an array of locks, all with same name, which txg_quiesce must
take all of in order to move txg to next state.  All default to the same
lockdep class, and so to lockdep appears recursive.

zp->z_name_lock:
================
In zfs_rmdir,
        dzp = znode for the directory (input to zfs_dirent_lock)
        zp  = znode for the entry being removed (output of zfs_dirent_lock)

zfs_rmdir()->zfs_dirent_lock() takes z_name_lock in dzp
zfs_rmdir() takes z_name_lock in zp

Since both dzp and zp are type znode_t, the locks have the same default
class, and lockdep considers it a possible recursive lock attempt.

l->l_rwlock:
============
zap_expand_leaf() sometimes creates two new zap leaf structures, via
these call paths:

zap_deref_leaf()->zap_get_leaf_byblk()->zap_leaf_open()
zap_expand_leaf()->zap_create_leaf()->zap_expand_leaf()->zap_create_leaf()

Because both zap_leaf_open() and zap_create_leaf() initialize
l->l_rwlock in their (separate) leaf structures, the lockdep class is
the same, and the linux kernel believes these might both be the same
lock, and emits a possible recursive lock warning.

Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3895
2015-12-22 10:21:33 -08:00
Olaf Faaland e0553a74ad Add lock types RW_NOLOCKDEP and MUTEX_NOLOCKDEP
Both lock types were introduced in SPL to allow some locks to be
taken/released with linux lockdep turned off.  See SPL commit for
details.

Add the new lock types to zfs_context.h to allow user space compilation.

Depends on SPL commit 692ae8d
SPL pull request refs/pull/480/head

Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3895
2015-12-22 10:20:29 -08:00
Kamil Domański 76d5bf196c Skip GPL-only symbols test when cross-compiling
Signed-off-by: Kamil Domański <kamil@domanski.co>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4107
2015-12-18 13:46:23 -08:00
DHE dcb6bed1df Make zio_taskq_batch_pct user configurable
Adds zio_taskq_batch_pct as an exported module parameter,
allowing users to modify it at module load time.

Signed-off-by: DHE <git@dehacked.net>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4110
2015-12-18 13:46:23 -08:00
Benjamin Albrecht 82dba185c8 Activate LVM volume groups before looking for zpools.
Original-patch-by: @jgoerzen
Signed-off-by: Benjamin Albrecht <git@albrecht.io>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes zfsonlinux/pkg-zfs#102
Closes #4029
2015-12-18 13:46:23 -08:00
Ned Bass 6b4e21c60e Man page white space and spelling corrections
Correct some misspelled words and grammatical errors, and remove
trailing white space in the man pages.

Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4115
2015-12-18 13:33:37 -08:00
Brian Behlendorf a58df6f536 Fix zfs_vdev_aggregation_limit bounds checking
Update the bounds checking for zfs_vdev_aggregation_limit so that
it has a floor of zero and a maximum value of the supported block
size for the pool.

Additionally add an early return when zfs_vdev_aggregation_limit
equals zero to disable aggregation.  For very fast solid state or
memory devices it may be more expensive to perform the aggregation
than to issue the IO immediately.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2015-12-18 13:32:06 -08:00
Brian Behlendorf 6fe53787f3 Fix vdev_queue_aggregate() deadlock
This deadlock may manifest itself in slightly different ways but
at the core it is caused by a memory allocation blocking on file-
system reclaim in the zio pipeline.  This is normally impossible
because zio_execute() disables filesystem reclaim by setting
PF_FSTRANS on the thread.  However, kmem cache allocations may
still indirectly block on file system reclaim while holding the
critical vq->vq_lock as shown below.

To resolve this issue zio_buf_alloc_flags() is introduced which
allocation flags to be passed.  This can then be used in
vdev_queue_aggregate() with KM_NOSLEEP when allocating the
aggregate IO buffer.  Since aggregating the IO is purely a
performance optimization we want this to either succeed or fail
quickly.  Trying too hard to allocate this memory under the
vq->vq_lock can negatively impact performance and result in
this deadlock.

* z_wr_iss
zio_vdev_io_start
  vdev_queue_io -> Takes vq->vq_lock
    vdev_queue_io_to_issue
      vdev_queue_aggregate
        zio_buf_alloc -> Waiting on spl_kmem_cache process

* z_wr_int
zio_vdev_io_done
  vdev_queue_io_done
    mutex_lock -> Waiting on vq->vq_lock held by z_wr_iss

* txg_sync
spa_sync
  dsl_pool_sync
    zio_wait -> Waiting on zio being handled by z_wr_int

* spl_kmem_cache
spl_cache_grow_work
  kv_alloc
    spl_vmalloc
      ...
      evict
        zpl_evict_inode
          zfs_inactive
            dmu_tx_wait
              txg_wait_open -> Waiting on txg_sync

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes #3808
Closes #3867
2015-12-18 13:27:12 -08:00
Brian Behlendorf a8ad3bf02c Fix z_xattr_lock/z_teardown_lock lock inversion
There exists a lock inversion between the z_xattr_lock and the
z_teardown_lock.  Detect this case and return EBUSY so zfs_resume_fs()
will mark the inode stale and it can be safely revalidated on next
access.

* process-1
zpl_xattr_get -> Takes zp->z_xattr_lock
  __zpl_xattr_get
    zfs_lookup -> Takes zsb->z_teardown_lock in ZFS_ENTER macro

* process-2
zfs_ioc_recv -> Takes zsb->z_teardown_lock in zfs_suspend_fs()
  zfs_resume_fs
    zfs_rezget -> Takes zp->z_xattr_lock

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #3969
2015-12-18 13:17:44 -08:00
Chunwei Chen 2727b9d3b6 Use uio for zvol_{read,write}
Since uio now supports bvec, we can convert bio into uio and reuse
dmu_{read,write}_uio. This way, we can remove some duplicate code.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4078
2015-12-15 16:21:43 -08:00
Chunwei Chen 502923bb44 Fix uio_prefaultpages for 0 length iovec
Userspace can freely pass in whatever iovec it feels like, and it's perfectly
legal to pass an iovec which contains a zero length segment. In the current
implementation, uio_prefaultpages would touch an out of bound byte in the
"last byte" logic. While this probably wouldn't cause any critical error, we
would like uio_prefaultpages to be able to continue gracefully.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4078
2015-12-15 16:19:55 -08:00
Brian Behlendorf eba9e745dc Handle damaged blk_birth in dsl_deadlist_insert()
If a bit were cleared in `bp->blk_birth` such that the txg birth
was now lower than any other txg_birth in the deadlist, then there
will be no entry before this in the tree.

This should be impossible but regardless error handling code has
been added for this case.  By default this is left as a fatal case
and the blk_birth is logged.  However, setting `zfs_recover=1` will
cause the bp to be placed at the start of the deadlist even though
it contains an invalid blk_birth.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Closes #4086
Closes #4089
2015-12-15 16:12:31 -08:00
Brian Behlendorf 1cdb86cba2 Handle block pointers with a corrupt logical size
Commit 5f6d0b6 was originally added to gracefully handle block
pointers with a damaged logical size.  However, it incorrectly
assumed that all passed arc_done_func_t could handle a NULL
arc_buf_t.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4069
Closes #4080
2015-12-15 16:11:44 -08:00
Olaf Faaland a6c6e0f583 Remove "index" column from dbufstat.py
Commit ca0bf58d to address arcs_mtx contention removed column "index"
from the output of kstats/dbuf.

dbufstat.py was not updated to reflect this, which causes it to crash
when run with -bx

This removes "index" from hardcoded lists of columns.

Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4096
2015-12-15 14:40:21 -08:00
Richard Yao 799402d8c7 Revert "Switch ztest mmap(2) ASSERTs to VERIFYs"
This reverts commit 2026196230.

It is no longer necessary now that we pass -DDEBUG unconditionally.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4095
2015-12-14 12:53:14 -08:00
Richard Yao 27075111ed Unconditionally build zdb and ztest with -DDEBUG
Illumos unconditionally builds zdb and ztest with -DDEBUG. This helps
catch bugs and eliminates the need for commits like
2026196230, which changed ASSERTs to
VERIFYs. The following files in the illumos tree show this:

usr/src/cmd/zdb/Makefile.com
usr/src/cmd/ztest/Makefile.com

Given the usefulness of having early failure in these tools, we should
do it too.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4095
2015-12-14 12:53:09 -08:00
Brian Behlendorf 245b7ab3d1 Hold the zfs_snapentry_t before dispatch
While exceptionally unlikely to cause a problem the zfs_snapentry_t
hold should be taken before the dispatch to prevent any possibility
of the task being processed before the hold.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
2015-12-14 12:06:31 -08:00
Chunwei Chen 1997660170 Fix snapshot automount race cause EREMOTE
When a concorrent mount finishes just before calling to
zfsctl_snapshot_ismounted, if we return EISDIR, the VFS will return
with EREMOTE. We should instead just return 0, so VFS may retry and
would likely notice the dentry is alreadly mounted. This will be
inline with when usermode helper return EBUSY.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2015-12-14 12:06:31 -08:00
Brian Behlendorf 5ed27c572c Change zfs_snapshot_lock from mutex to rw lock
By changing the zfs_snapshot_lock from a mutex to a rw lock the
zfsctl_lookup_objset() function can be allowed to run concurrently.
This should reduce the latency of fh_to_dentry lookups in ZFS
snapshots which are being accessed over NFS.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
2015-12-14 12:06:31 -08:00
Brian Behlendorf f22f900f15 Fix zfsctl_lookup_objset() deadlock
The zfsctl_snapshot_unmount_delay() function must not be called
from zfsctl_lookup_objset() while it is currently holding the
zfs_snapshot_lock.  This will result in a deadlock.  It is safe
to call zfsctl_snapshot_unmount_delay_impl() directly because the
function already has a reference on the zfs_snapentry_t.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #3997
2015-12-14 12:05:52 -08:00
Brian Behlendorf 5e94284fe5 Set 'zfs_expire_snapshot=0' to disable auto-unmount
There are cases where it's desirable that auto-mounted snapshots
not expire after a fixed duration.  They should be unmounted only
when the filesystem they are a snapshot of is unmounted.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
2015-12-14 11:02:32 -08:00
Brian Behlendorf a22502c9e6 Either _ILP32 or _LP64 must be defined
For some arm, powerpc, and sparc platforms it was possible that
neither _ILP32 of _LP64 would be defined.  Update the isa_defs.h
header to explicitly set these macros and generate a compile error
in the case neither are defined.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Closes #4048
2015-12-10 11:55:38 -08:00
Chunwei Chen 24ef51f660 Use spa as key besides objsetid for snapentry
objsetid is not unique across pool, so using it solely as key would cause
panic when automounting two snapshot on different pools with the same
objsetid. We fix this by adding spa pointer as additional key.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Issue #3948
Issue #3786
Issue #3887
2015-12-08 16:38:56 -08:00
Brian Behlendorf b58986eebf Use large stacks when available
While stack size will vary by architecture it has historically defaulted to
8K on x86_64 systems.  However, as of Linux 3.15 the default thread stack
size was increased to 16K.  These kernels are now the default in most non-
enterprise distributions which means we no longer need to assume 8K stacks.

This patch takes advantage of that fact by appropriately reverting stack
conservation changes which were made to ensure stability.  Changes which
may have had a negative impact on performance for certain workloads.  This
also has the side effect of bringing the code slightly more in line with
upstream.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Closes #4059
2015-12-07 12:20:43 -08:00
cable2999 f40926795c Update arcstat.py to remove deprecated rmis reference.
Running arcstat.py -x currently throws KeyError due to rmis being
absent, it was removed in commit ca0bf58.

Signed-off-by: cable2999 <cable2999@users.noreply.github.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3931
2015-12-04 15:28:45 -08:00