Commit Graph

6532 Commits

Author SHA1 Message Date
Arvind Sankar 4d61ade1a3 Clean up lib dependencies
libzutil is currently statically linked into libzfs, libzfs_core and
libzpool. Avoid the unnecessary duplication by removing it from libzfs
and libzpool, and adding libzfs_core to libzpool.

Remove a few unnecessary dependencies:
- libuutil from libzfs_core
- libtirpc from libspl
- keep only libcrypto in libzfs, as we don't use any functions from
  libssl
- librt is only used for clock_gettime, however on modern systems that's
  in libc rather than librt. Add a configure check to see if we actually
  need librt
- libdl from raidz_test

Add a few missing dependencies:
- zlib to libefi and libzfs
- libuuid to zpool, and libuuid and libudev to zed
- libnvpair uses assertions, so add assert.c to provide aok and
  libspl_assertf

Sort the LDADD for programs so that libraries that satisfy dependencies
come at the end rather than the beginning of the linker command line.

Revamp the configure tests for libaries to use FIND_SYSTEM_LIBRARY
instead. This can take advantage of pkg-config, and it also avoids
polluting LIBS.

List all the required dependencies in the pkgconfig files, and move the
one for libzfs_core into the latter's directory. Install pkgconfig files
in $(libdir)/pkgconfig on linux and $(prefix)/libdata/pkgconfig on
FreeBSD, instead of /usr/share/pkgconfig, as the more correct location
for library .pc files.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10538
2020-07-10 14:26:00 -07:00
Arvind Sankar b6437ea41c Move libspl_assertf into .c file
Variadic functions cannot be inlined. libspl_assertf ends up being
duplicated in every file that uses it.

Fix this by moving the function into a new assert.c. Also move the
definition of aok into the new file instead of zone.c.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10538
2020-07-10 14:25:24 -07:00
George Amanakis 2054f35e56
Fix a persistent L2ARC bug in l2arc_write_done()
In case l2arc_write_done() handles a zio that was not successful check
that the list of log block pointers is not empty when restoring them
in the device header. Otherwise zero them out. In any case perform the
actual write updating the device header after the zio of
l2arc_write_buffers() completes as l2arc_write_done() may have touched
the memory holding the log block pointers in the device header.

Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #10540 
Closes #10543
2020-07-10 14:10:03 -07:00
Gabriel A. Devenyi d2bce6d036
Add Makefile command to run checkbashisms on all /bin/sh scripts
Based on the shellcheck make target, add a target which checks
for violations of POSIX standards for shell scripts

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Gabriel A. Devenyi <gdevenyi@gmail.com>
Closes #10513
2020-07-09 20:04:49 -07:00
Ryan Moeller a2ec738c75
ZTS: Make bc conditional use compatible with new BSD bc
FreeBSD recently replaced the GNU bc and dc in the base system with
BSD licensed versions.  They are supposed to be compatible with all
the features present in the GNU versions, but it turns out they are
picky about `if` statements having a corresponding `else`.  ZTS uses
`echo "if ($x > $y) 1" | bc` in a few places, which causes tests to
fail unexpectedly with the new bc.

Change the two expressions in ZTS to `if ($x > $y) 1 else 0` for
compatibility with the new BSD bc.

Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10551
2020-07-09 17:49:02 -07:00
Ryan Moeller 659f4008be
libzfs: Make zfs_cmd_t initialization consistent, use zfs_ioctl
The clang version 8.0.1 shipped in FreeBSD 12.1-RELEASE also oddly
throws a warning that is treated as an error on the initialization of
the zc struct in zpool_nextboot.

The zpool_nextboot code from FreeBSD was not updated to use zfs_ioctl.

Switch ioctl to zfs_ioctl in and use {"\0"} to initialize the struct.
Do a consistency pass for zfs_cmd_t initialization.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Wilson <gwilson@delphix.com>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10539
2020-07-09 17:47:12 -07:00
Ryan Moeller fb91f0367e
Add zpool_nextboot, move zfs_jail to libzfs.h
FreeBSD has a zfsbootcfg command that wants zpool_nextboot in libzfs.

Add the function to FreeBSD's libzfs_compat.c, and while here move
the prototype for zfs_jail out of param.h in FreeBSD's SPL and into
libzfs.h under an ifdef for FreeBSD, where the prototype for
zpool_nextboot joins it.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10524
2020-07-06 11:57:24 -07:00
Mark Johnston cd32b4f5b7 Fix a deadlock in the FreeBSD getpages VOP
FreeBSD has a per-page "busy" lock which is held when handling a page
fault on a mapped file.  This lock is also acquired when copying data
from the DMU to the page cache in zfs_write().  File range locks are
also acquired in both of these paths, in the opposite order with respect
to the busy lock.

In the getpages VOP, the range lock is only used to determine the extent
of optional read-ahead and read-behind operations.  To resolve the lock
order reversal, modify the getpages VOP to avoid blocking on the range
lock.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Mark Johnston <markj@FreeBSD.org>
Closes #10519
2020-07-06 11:53:57 -07:00
Mark Johnston 6e00561712 Add a "try" operation for range locks
zfs_rangelock_tryenter() bails immediately instead of waiting for the
lock to become available.  This will be used to resolve a deadlock in
the FreeBSD page-in code.  No functional change intended.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Mark Johnston <markj@FreeBSD.org>
Closes #10519
2020-07-06 11:53:31 -07:00
winglq a4b0a74c7f
Fix atomic_clear_long_excl wrong return
When clearing a bit, we should check whether that bit is 0.
Note atomic_clear_long_excl is not used.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Liu Qing <winglq@gmail.com>
Closes #10526
2020-07-06 11:46:17 -07:00
Ryan Moeller 8a3d9186ba
Update zfs_freebsd_need_inactive to fix mmapped writes
`zfs_freebsd_need_inactive` appears to been based on an unfinished
version of https://reviews.freebsd.org/D22130 which had a bug where
files written via mmap wouldn't actually persist.

Update the function to match the final version committed to FreeBSD.

Authored-by: Mateusz Guzik <mjg@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10527 
Closes #10528
2020-07-03 11:30:04 -07:00
Brian Behlendorf 9a49d3f3d3
Add device rebuild feature
The device_rebuild feature enables sequential reconstruction when
resilvering.  Mirror vdevs can be rebuilt in LBA order which may
more quickly restore redundancy depending on the pools average block
size, overall fragmentation and the performance characteristics
of the devices.  However, block checksums cannot be verified
as part of the rebuild thus a scrub is automatically started after
the sequential resilver completes.

The new '-s' option has been added to the `zpool attach` and
`zpool replace` command to request sequential reconstruction
instead of healing reconstruction when resilvering.

    zpool attach -s <pool> <existing vdev> <new vdev>
    zpool replace -s <pool> <old vdev> <new vdev>

The `zpool status` output has been updated to report the progress
of sequential resilvering in the same way as healing resilvering.
The one notable difference is that multiple sequential resilvers
may be in progress as long as they're operating on different
top-level vdevs.

The `zpool wait -t resilver` command was extended to wait on
sequential resilvers.  From this perspective they are no different
than healing resilvers.

Sequential resilvers cannot be supported for RAIDZ, but are
compatible with the dRAID feature being developed.

As part of this change the resilver_restart_* tests were moved
in to the functional/replacement directory.  Additionally, the
replacement tests were renamed and extended to verify both
resilvering and rebuilding.

Original-patch-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: John Poduska <jpoduska@datto.com>
Co-authored-by: Mark Maybee <mmaybee@cray.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10349
2020-07-03 11:05:50 -07:00
Matthew Macy 7ddb753d17
freebsd: changes necessary to coexist with dtrace in tree
Fix header conflicts when building zfs with openzfs as a vendor import.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10497
2020-07-01 09:10:08 -07:00
Harald van Dijk 22831636c8
configure fixes
a+=b is not supported by all shells. It is equivalent to a=${a}b, so
just rewrite it as that.

This also fixes commit 9ea6c3d3, which intended to only make the
definitions of _dracutdir, _udevdir, and _udevruledir conditional, but
actually ensured that _initconfdir no longer got defined if _dracutdir
was defined, and defined _udevdir to the value that should have been
used for _udevruledir.

This also fixes the fact that the checks introduced by commit 9ea6c3d3
could never work: ZFS_AC_PACKAGE was called before the configuration
options were processed.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Harald van Dijk <harald@gigawatt.nl>
Closes #10518
2020-07-01 09:05:21 -07:00
Harald van Dijk 2ac6aa1176
pam: fix test usage in configure script
The standard test command does not support the == operator. Certain
shells, including bash, do support it, but in those shells it does
exactly the same thing as the standard = operator. Use that instead.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Harald van Dijk <harald@gigawatt.nl>
Closes #10509
2020-06-29 09:28:22 -07:00
Matthew Ahrens 3c42c9ed84
Clean up OS-specific ARC and kmem code
OS-specific code (e.g. under `module/os/linux`) does not need to share
its code structure with any other operating systems.  In particular, the
ARC and kmem code need not be similar to the code in illumos, because we
won't be syncing this OS-specific code between operating systems.  For
example, if/when illumos support is added to the common repo, we would
add a file `module/os/illumos/zfs/arc_os.c` for the illumos versions of
this code.

Therefore, we can simplify the code in the OS-specific ARC and kmem
routines.

These changes do not impact system behavior, they are purely code
cleanup.  The changes are:

Arenas are not used on Linux or FreeBSD (they are always `NULL`), so
`heap_arena`, `zio_arena`, and `zio_alloc_arena` can be removed, along
with code that uses them.

In `arc_available_memory()`:
 * `desfree` is unused, remove it
 * rename `freemem` to avoid conflict with pre-existing `#define`
 * remove checks related to arenas
 * use units of bytes, rather than converting from bytes to pages and
   then back to bytes

`SPL_KMEM_CACHE_REAP` is unused, remove it.

`skc_reap` is unused, remove it.

The `count` argument to `spl_kmem_cache_reap_now()` is unused, remove
it.

`vmem_size()` and associated type and macros are unused, remove them.

In `arc_memory_throttle()`, use a less confusing variable name to store
the result of `arc_free_memory()`.

Reviewed-by: George Wilson <gwilson@delphix.com>
Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #10499
2020-06-29 09:01:07 -07:00
Arvind Sankar 94a2dca6a0 Mark phony targets as phony.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10506
2020-06-27 17:40:15 -07:00
Arvind Sankar 2b5f3045ae paxcheck needs to run against the builddir not the srcdir
Otherwise it does nothing on an out-of-tree build.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10506
2020-06-27 17:40:15 -07:00
Arvind Sankar c79907f901 Move cppcheck suppressions out of .github
Move this file out of .github and add it to distribution.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10506
2020-06-27 17:40:15 -07:00
Arvind Sankar a86f0be8ef Remove config/suppressed-warnings.txt
This doesn't appear to be used by the buildbot any more, let's remove
it.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10506
2020-06-27 17:40:15 -07:00
Arvind Sankar 4d8e68c42f Avoid installing kernel headers on FreeBSD
The kernel headers are installed for DKMS on linux, so don't install
them unless we're building on linux.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10506
2020-06-27 17:40:14 -07:00
Brian Behlendorf 67b1362f04 Style fixes
* Fix cstyle issue in shrinker.h which exceeded 80 columns.
* Silence shellcheck warning in zpool.d/smart script.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2020-06-27 17:38:55 -07:00
Allan Jude 3bc92b9ef6
Make zstreamdump output the size of the payload for BEGIN records
This is helpful for determining the size of the nvlist of snapshots
and properties

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Closes #10505
2020-06-27 10:29:47 -07:00
Matthew Ahrens 270ece24b6
Revise SPL wrapper for shrinker callbacks
The SPL provides a wrapper for the kernel's shrinker callbacks, which
enables the ZFS code to interface with multiple versions of the shrinker
API's from different kernel versions.  Specifically, Linux kernels 3.0 -
3.11 has a single "combined" callback, and Linux kernels 3.12 and later
have two "split" callbacks.  The SPL provides a wrapper function so that
the ZFS code only needs to implement one version of the callbacks.

Currently the SPL's wrappers are designed such that the ZFS code
implements the older, "combined" callback.  There are a few downsides to
this approach:

* The general design within ZFS is for the latest Linux kernel to be
considered the "first class" API.

* The newer, "split" callback API is easier to understand, because each
callback has one purpose.

* The current wrappers do not completely abstract out the differing
API's, so ZFS code needs `#ifdef` code to handle the differing return
values required for different kernel versions.

This commit addresses these drawbacks by having the ZFS code provide the
latest, "split" callbacks, and the SPL provides a wrapping function for
the older, "combined" API.

Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #10502
2020-06-27 10:27:02 -07:00
Serapheim Dimitropoulos ec1fea4516
Use percpu_counter for obj_alloc counter of Linux-backed caches
A previous commit enabled the tracking of object allocations
in Linux-backed caches from the SPL layer for debuggability.
The commit is: 9a170fc6fe

Unfortunately, it also introduced minor performance regressions
that were highlighted by the ZFS perf test-suite. Within Delphix
we found that the regression would be from -1%, all the way up
to -8% for some workloads.

This commit brings performance back up to par by creating a
separate counter for those caches and making it a percpu in
order to avoid lock-contention.

The initial performance testing was done by myself, and the
final round was conducted by @tonynguien who was also the one
that discovered the regression and highlighted the culprit.

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #10397
2020-06-26 18:06:50 -07:00
Matthew Ahrens 7b232e9354
arcstat: add 'avail', fix 'free'
The meaning of the `free` field is currently `zfs_arc_sys_free`, which
is the target amount of memory to leave free for the system, and is
constant after booting.

This commit changes the meaning of `free` to arc_free_memory(), the
amount of memory that the ARC considers to be free.

It also adds a new arcstat field `avail`, which tracks
`arc_available_memory()`.

Since `avail` can be negative, it also updates the arcstat script to
pretty-print negative values.

example output:

  $ arcstat -f time,miss,arcsz,c,grow,need,free,avail 1
      time  miss  arcsz     c  grow  need  free  avail
  15:03:02   39K   114G  114G     0     0  2.4G  407M
  15:03:03   42K   114G  114G     0     0  2.1G  120M
  15:03:04   40K   114G  114G     0     0  1.8G  -177M
  15:03:05   24K   113G  112G     0     0  1.7G  -269M
  15:03:06   29K   111G  110G     0     0  1.6G  -385M
  15:03:07   27K   110G  108G     0     0  1.4G  -535M
  15:03:08   13K   108G  108G     0     0  2.2G  239M
  15:03:09   33K   107G  107G     0     0  1.3G  -639M
  15:03:10   16K   105G  102G     0     0  2.6G  704M
  15:03:11  7.2K   102G  102G     0     0  5.1G  3.1G
  15:03:12   42K   103G  102G     0     0  4.8G  2.8G

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #10494
2020-06-26 18:05:28 -07:00
Robert Novak bfcbec6f5d
Add block histogram to zdb
The block histogram tracks the changes to psize, lsize and asize
both in the count of the number of blocks (by blocksize) and the
total length of all of the blocks for that blocksize.  It also
keeps a running total of the cumulative size of all of the blocks
up to each size to help determine the size of caching SSDs to be
added to zfs hardware deployments.

The block history counts and lengths are summarized in bins
which are powers of two. Even rows with counts of zero are printed.

This change is accessed by specifying one of two options:

zdb -bbb pool
zdb -Pbbb pool

The first version prints the table in fixed size columns.
The second prints in "parseable" output that can be placed into
a CSV file.

Fixed Column, nicenum output sample:
  block   psize                lsize                asize
   size   Count Length   Cum.  Count Length   Cum.  Count Length   Cum.
    512:  3.50K  1.75M  1.75M  3.43K  1.71M  1.71M  3.41K  1.71M  1.71M
     1K:  3.65K  3.67M  5.43M  3.43K  3.44M  5.15M  3.50K  3.51M  5.22M
     2K:  3.45K  6.92M  12.3M  3.41K  6.83M  12.0M  3.59K  7.26M  12.5M
     4K:  3.44K  13.8M  26.1M  3.43K  13.7M  25.7M  3.49K  14.1M  26.6M
     8K:  3.42K  27.3M  53.5M  3.41K  27.3M  53.0M  3.44K  27.6M  54.2M
    16K:  3.43K  54.9M   108M  3.50K  56.1M   109M  3.42K  54.7M   109M
    32K:  3.44K   110M   219M  3.41K   109M   218M  3.43K   110M   219M
    64K:  3.41K   218M   437M  3.41K   218M   437M  3.44K   221M   439M
   128K:  3.41K   437M   874M  3.70K   474M   911M  3.41K   437M   876M
   256K:  3.41K   874M  1.71G  3.41K   874M  1.74G  3.41K   874M  1.71G
   512K:  3.41K  1.71G  3.41G  3.41K  1.71G  3.45G  3.41K  1.71G  3.42G
     1M:  3.41K  3.41G  6.82G  3.41K  3.41G  6.86G  3.41K  3.41G  6.83G
     2M:      0      0  6.82G      0      0  6.86G      0      0  6.83G
     4M:      0      0  6.82G      0      0  6.86G      0      0  6.83G
     8M:      0      0  6.82G      0      0  6.86G      0      0  6.83G
    16M:      0      0  6.82G      0      0  6.86G      0      0  6.83G

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Robert E. Novak <novak5@llnl.gov>
Closes: #9158 
Closes #10315
2020-06-26 15:09:20 -07:00
Arvind Sankar 6b99fc0620 Fixes for make dist
Reduce the usage of EXTRA_DIST. If files are conditionally included in
_SOURCES, _HEADERS etc, automake is smart enough to dist all files that
could possibly be included, but this does not apply to EXTRA_DIST,
resulting in make dist depending on the configuration.

Add some files that were missing altogether in various Makefile's.

The changes to disted files in this commit (excluding deleted files):

+./cmd/zed/agents/README.md
+./etc/init.d/README.md
+./lib/libspl/os/freebsd/getexecname.c
+./lib/libspl/os/freebsd/gethostid.c
+./lib/libspl/os/freebsd/getmntany.c
+./lib/libspl/os/freebsd/mnttab.c
-./lib/libzfs/libzfs_core.pc
-./lib/libzfs/libzfs.pc
+./lib/libzfs/os/freebsd/libzfs_compat.c
+./lib/libzfs/os/freebsd/libzfs_fsshare.c
+./lib/libzfs/os/freebsd/libzfs_ioctl_compat.c
+./lib/libzfs/os/freebsd/libzfs_zmount.c
+./lib/libzutil/os/freebsd/zutil_compat.c
+./lib/libzutil/os/freebsd/zutil_device_path_os.c
+./lib/libzutil/os/freebsd/zutil_import_os.c
+./module/lua/README.zfs
+./module/os/linux/spl/README.md
+./tests/README.md
+./tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_rm_nested.ksh
+./tests/zfs-tests/tests/functional/cli_root/zfs_send/zfs_send_encrypted_unloaded.ksh
+./tests/zfs-tests/tests/functional/inheritance/README.config
+./tests/zfs-tests/tests/functional/inheritance/README.state
+./tests/zfs-tests/tests/functional/rsend/rsend_016_neg.ksh
+./tests/zfs-tests/tests/perf/fio/sequential_readwrite.fio

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10501
2020-06-26 14:20:02 -07:00
Arvind Sankar 7c902a5178 Include FreeBSD sources in module dist
Add os/freebsd and Makefile.bsd into distdir target.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10501
2020-06-26 14:19:35 -07:00
Matthew Ahrens 67c0f0dedc
ARC shrinking blocks reads/writes
ZFS registers a memory hook, `__arc_shrinker_func`, which is supposed to
allow the ARC to shrink when the kernel experiences memory pressure.
The ARC shrinker changes `arc_c` via a call to
`arc_reduce_target_size()`.  Before commit 3ec34e5527, the ARC
shrinker would also evict data from the ARC to bring `arc_size` down to
the new `arc_c`.  However, that commit (seemingly inadvertently) made it
so that the ARC shrinker no longer evicts any data or waits for eviction
to complete.

Repeated calls to the ARC shrinker can reduce `arc_c` drastically, often
all the way to `arc_c_min`.  Since it doesn't wait for the actual
eviction of data from the ARC, this creates a situation where `arc_size`
is more than `arc_c` for the several seconds/minutes it takes for
`arc_adjust_zthr` to evict data from the ARC.  During this time,
arc_get_data_impl() will block, so ZFS can't process read/write requests
(e.g. from iSCSI, NFS, or read/write syscalls).

To ensure that `arc_c` doesn't shrink faster than the adjust thread can
keep up, this commit makes the ARC shrinker wait for the eviction to
complete, resulting in similar behavior to what we had before commit
3ec34e5527.

Note: commit 3ec34e5527 is `OpenZFS 9284 - arc_reclaim_thread
has 2 jobs` and was integrated in December 2018, and is part of ZoL
0.8.x but not 0.7.x.

Additionally, when the ARC size is reduced drastically, the
`arc_adjust_zthr` can be on-CPU for many seconds without blocking.  Any
threads that are bound to the same CPU that arc_adjust_zthr is running
on will not able to run for a long time.

To ensure that CPU-bound threads can make progress, this commit changes
`arc_evict_state_impl()` make a voluntary preemption call,
`cond_resched()`.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Wilson <gwilson@delphix.com>
Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
External-issue: DLPX-70703
Closes #10496
2020-06-26 10:42:27 -07:00
felixdoerre 221e67040f
pam: implement a zfs_key pam module
Implements a pam module for automatically loading zfs encryption keys 
for home datasets. The pam module:

  - loads a zfs key and mounts the dataset when a session opens.
  - unmounts the dataset and unloads the key when the session closes.
  - when the user is logged on and changes the password, the module
    changes the encryption key.

Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: @jengelh <jengelh@inai.de>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Felix Dörre <felix@dogcraft.de>
Closes #9886
Closes #9903
2020-06-24 18:45:44 -07:00
Arvind Sankar 7513807320 Drop unnecessary srcdir paths
There's no need to specify the srcdir explicitly in _HEADERS and
EXTRA_DIST.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10493
2020-06-24 18:20:18 -07:00
Arvind Sankar 5ca349f95d Fix check for sed --in-place
The test added in commit
  4313a5b4c5 ("Detect if sed supports --in-place")
doesn't work at least on my system (autoconfig-2.69).

The issue is that SED has already been found and cached before this
function is evaluated, with the result that the test is completely
skipped.

...
checking for a sed that does not truncate output... /usr/bin/sed
...
checking for sed --in-place... (cached) /usr/bin/sed

The first test is executed by libtool.m4. This looks to have been around
in libtool for at least 15 years or so, not sure why this was not
encountered at the time of the original commit.

Fix this by caching the value of the ac_inplace flag rather than the
path to SED. Also use $SED and add AC_REQUIRE to ensure that we use the
sed that was located by the standard configure test.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10493
2020-06-24 18:19:59 -07:00
Arvind Sankar 9642beef2b Add missing third-party license files to dist
These license files were added in commit
  31b160f0a6 ("ICP: Improve AES-GCM performance")
but not added to the distributed files.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10493
2020-06-24 18:19:51 -07:00
Arvind Sankar 0b03254830 Fix tags targets in module/Makefile.in + cleanup
These targets look to have been copied from an automake-generated
Makefile.in, and can't work since none of the auto-generated automake
variables are defined here.

Moreover, ctags has been overridden in the top-level Makefile, so the
target is pointless anyway, and gtags is not a recursive target.

Fix cscopelist by moving it to the top-level Makefile as well, in line
with ctags and etags.

Also, add -a to ctags command as well, otherwise it won't work if more
than one xargs invocation takes place.

Add assembler files to ctags/etags, prune all dotted-dirs, and restrict
the find to files only.

Cleanup: add .PHONY to module/Makefile.in, and fix one recipe with a
missing continuation character.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10493
2020-06-24 18:19:44 -07:00
Arvind Sankar 2989d1012a Fix libspl/asm-generic/atomic for VPATH build
Currently, asm-generic/atomic.c is compiled into a .S file, with a
comment saying this is to simplify the upper-level Makefile.

However, this doesn't work properly with a VPATH build, which would
require better logic to deal with generated sources correctly.

It also doesn't seem more complex to just specify the .c/.S source file,
depending on the cpu, instead of only the source directory in
lib/libspl/Makefile.am, which eliminates the need to do the intermediate
compilation.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10493
2020-06-24 18:19:36 -07:00
Arvind Sankar 109d2c9310 Move zfs_gitrev.h to build directory
Currently an out-of-tree build does not work with read-only source
directory because zfs_gitrev.h can't be created. Move this file to the
build directory, which is more appropriate for a generated file, and
drop the dist-hook for zfs_gitrev.h. There is no need to distribute this
file since it will be regenerated as part of the compilation in any
case.

scripts/make_gitrev.sh tries to avoid updating zfs_gitrev.h if there has
been no change, however this doesn't cover the case when the source
directory is not in git: in that case zfs_gitrev.h gets overwritten even
though it's always "unknown". Simplify the logic to always write out a
new version of zfs_gitrev.h, compare against the old and overwrite only
if different. This is now simple enough to just include in the
Makefile, so drop the script.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10493
2020-06-24 18:19:28 -07:00
Arvind Sankar 33982eb24c Support out-of-tree kmod build on FreeBSD
If srcdir != builddir, pass down MAKEOBJDIR to the FreeBSD make to
support out-of-tree builds.

Also allow passing all the gmake options that FreeBSD make understands
to support useful flags like -k, -n, -q etc, and detect the number of
CPUs if -j was specified without an argument.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10493
2020-06-24 18:18:41 -07:00
Kevin P. Fleming f21de6883f
Add trim_finish notify script for ZED
Allow users to configure notifications when TRIM operations are
completed on pools. Unlike resilver_finish and scrub_finish,
the trim_finish event is generated for each vdev in the pool
which was trimmed, so the script will generate a notification
for each one.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Kevin P. Fleming <kevin@km6g.us>
Closes #10491
2020-06-24 16:57:13 -07:00
Ryan Moeller 9192f27c1d
Add zfs_multihost_interval tunable handler for FreeBSD
This tunable required a handler to be implemented for
ZFS_MODULE_PARAM_CALL.

Add the handler so the tunable can be declared in common code.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10490
2020-06-23 13:32:42 -07:00
Prawn 2451a55368
zfs -V: Print userland version even if kernel module not loaded
Running zfs -V when the modules are not loaded would currently 
result in the following output:

    zfs_version_kernel() failed: No such file or directory

Note the lack of userland version output.  Reorder the code to
ensure the userland version is printed even when the kmods
are not loaded.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: InsanePrawn <insane.prawny@gmail.com>
Closes #10483
2020-06-22 09:56:29 -07:00
Jorgen Lundman 68301ba20e
zed additional features
This commit adds two features to zed, that macOS desires. The first
is that when you unload the kernel module, zed would enter into a
cpubusy loop calling zfs_events_next() repeatedly. We now look for
ENODEV, returned by kernel, so zed can exit gracefully.

Second feature is -I (idle) (alas -P persist was taken) is for the
deamon to;

1; if started without ZFS kernel module, stick around waiting for it.
2; if kernel module is unloaded, go back to 1.

This is due to daemons in macOS is started by launchctl, and is
expected to stick around.

Currently, the busy loop only exists when errno is ENODEV. This is
to ensure that functionality that upstream expects is not changed.
It did not care about errors before, and it still does not. (with the
exception of ENODEV).

However, it is probably better that all errors
(ERESTART notwithstanding) exits the loop, and the issues complaining
about zed taking all CPU will go away.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Jorgen Lundman <lundman@lundman.net>
Closes #10476
2020-06-22 09:53:34 -07:00
Serapheim Dimitropoulos 42d8d1d66a
Remove unnecessary terminology from error-injection in ztest
Rephrase error-injection comment in ztest to be more clear.

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Sara Hartse <sara.hartse@delphix.com>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #10482
2020-06-22 09:48:36 -07:00
Matthew Ahrens 540493ba4f
Clarify comments in config/*.m4, vdev_geom.c, zfs_allow_*.ksh
Rephrase comments to be more clear.

Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #10481
2020-06-22 09:46:37 -07:00
Brian Behlendorf 745ace3f24
Update zts-report.py with additional tests
The following test cases may still occasionally fail and are being
added to the "maybe" list for Linux until they can be updated to be
entirely reliable.

  cli_root/zfs_rename/zfs_rename_002_pos.ksh
  cli_root/zpool_reopen/zpool_reopen_003_pos.ksh
  refreserv/refreserv_raidz

These 6 tests consistently fail only on Fedora 31+, the failures
are related to the kernel rescanning the partition table on loopback
devices which is no longer reliable unless partprobe is used.  In
order to enable the Fedora bot by default they are also being added
to the list until the tests can be updated.  Any significant regression
in functionality covered by these tests will still be detected by the
FreeBSD builders.

  alloc_class/alloc_class_009_pos
  alloc_class/alloc_class_010_pos
  cli_root/zpool_expand/zpool_expand_001_pos
  cli_root/zpool_expand/zpool_expand_005_pos
  rsend/rsend_007_pos
  rsend/rsend_010_pos
  rsend/rsend_011_pos
  snapshot/rollback_003_pos

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10489
2020-06-22 09:44:49 -07:00
Ryan Moeller 1c08fa8b5b
Fix copy-paste error breaking FreeBSD head
Resolve the FreeBSD head build failure.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10480
2020-06-19 15:12:34 -07:00
Andriy Gapon a8bd6dcf87
zfs allow/unallow should work with numeric uid/gid
And that should work even (especially) if there is no matching user or
group name.  The change is originally by Xin Lin <delphij@FreeBSD.org>.

Original-patch-by: Xin Li <delphij@FreeBSD.org>
Reviewed-by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed-by: Andy Stormont <astormont@racktopsystems.com>
Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Andriy Gapon <avg@FreeBSD.org>
Closes #9792 
Closes #10280
2020-06-19 10:38:43 -07:00
Ryan Moeller 2e6af52b2e
Match new vfs_checkexp KPI in FreeBSD head
KPI changed in FreeBSD, update accordingly.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10475
2020-06-18 13:45:36 -07:00
Arvind Sankar ae7b167a98 Enable -Wmissing-prototypes/-Wstrict-prototypes
Switch on warning flags to detect mismatch between declaration and
definition.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10470
2020-06-18 12:21:53 -07:00
Arvind Sankar c0673571d0 Switch off -Wmissing-prototypes for libgcc math functions
spl-generic.c defines some of the libgcc integer library functions on
32-bit. Don't bother checking -Wmissing-prototypes since nothing should
directly call these functions from C code.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10470
2020-06-18 12:21:46 -07:00