Commit Graph

362 Commits

Author SHA1 Message Date
Richard Yao fdc2d30371
Cleanup: Specify unsignedness on things that should not be signed
In #13871, zfs_vdev_aggregation_limit_non_rotating and
zfs_vdev_aggregation_limit being signed was pointed out as a possible
reason not to eliminate an unnecessary MAX(unsigned, 0) since the
unsigned value was assigned from them.

There is no reason for these module parameters to be signed and upon
inspection, it was found that there are a number of other module
parameters that are signed, but should not be, so we make them unsigned.
Making them unsigned made it clear that some other variables in the code
should also be unsigned, so we also make those unsigned. This prevents
users from setting negative values that could potentially cause bad
behaviors. It also makes the code slightly easier to understand.

Mostly module parameters that deal with timeouts, limits, bitshifts and
percentages are made unsigned by this. Any that are boolean are left
signed, since whether booleans should be considered signed or unsigned
does not matter.

Making zfs_arc_lotsfree_percent unsigned caused a
`zfs_arc_lotsfree_percent >= 0` check to become redundant, so it was
removed. Removing the check was also necessary to prevent a compiler
error from -Werror=type-limits.

Several end of line comments had to be moved to their own lines because
replacing int with uint_t caused us to exceed the 80 character limit
enforced by cstyle.pl.

The following were kept signed because they are passed to
taskq_create(), which expects signed values and modifying the
OpenSolaris/Illumos DDI is out of scope of this patch:

	* metaslab_load_pct
	* zfs_sync_taskq_batch_pct
	* zfs_zil_clean_taskq_nthr_pct
	* zfs_zil_clean_taskq_minalloc
	* zfs_zil_clean_taskq_maxalloc
	* zfs_arc_prune_task_threads

Also, negative values in those parameters was found to be harmless.

The following were left signed because either negative values make
sense, or more analysis was needed to determine whether negative values
should be disallowed:

	* zfs_metaslab_switch_threshold
	* zfs_pd_bytes_max
	* zfs_livelist_min_percent_shared

zfs_multihost_history was made static to be consistent with other
parameters.

A number of module parameters were marked as signed, but in reality
referenced unsigned variables. upgrade_errlog_limit is one of the
numerous examples. In the case of zfs_vdev_async_read_max_active, it was
already uint32_t, but zdb had an extern int declaration for it.

Interestingly, the documentation in zfs.4 was right for
upgrade_errlog_limit despite the module parameter being wrongly marked,
while the documentation for zfs_vdev_async_read_max_active (and friends)
was wrong. It was also wrong for zstd_abort_size, which was unsigned,
but was documented as signed.

Also, the documentation in zfs.4 incorrectly described the following
parameters as ulong when they were int:

	* zfs_arc_meta_adjust_restarts
	* zfs_override_estimate_recordsize

They are now uint_t as of this patch and thus the man page has been
updated to describe them as uint.

dbuf_state_index was left alone since it does nothing and perhaps should
be removed in another patch.

If any module parameters were missed, they were not found by `grep -r
'ZFS_MODULE_PARAM' | grep ', INT'`. I did find a few that grep missed,
but only because they were in files that had hits.

This patch intentionally did not attempt to address whether some of
these module parameters should be elevated to 64-bit parameters, because
the length of a long on 32-bit is 32-bit.

Lastly, it was pointed out during review that uint_t is a better match
for these variables than uint32_t because FreeBSD kernel parameter
definitions are designed for uint_t, whose bit width can change in
future memory models.  As a result, we change the existing parameters
that are uint32_t to use uint_t.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Neal Gompa <ngompa@datto.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13875
2022-09-27 16:42:41 -07:00
Richard Yao 7584fbe846
Cleanup: Switch to strlcpy from strncpy
Coverity found a bug in `zfs_secpolicy_create_clone()` where it is
possible for us to pass an unterminated string when `zfs_get_parent()`
returns an error. Upon inspection, it is clear that using `strlcpy()`
would have avoided this issue.

Looking at the codebase, there are a number of other uses of `strncpy()`
that are unsafe and even when it is used safely, switching to
`strlcpy()` would make the code more readable. Therefore, we switch all
instances where we use `strncpy()` to use `strlcpy()`.

Unfortunately, we do not portably have access to `strlcpy()` in
tests/zfs-tests/cmd/zfs_diff-socket.c because it does not link to
libspl. Modifying the appropriate Makefile.am to try to link to it
resulted in an error from the naming choice used in the file. Trying to
disable the check on the file did not work on FreeBSD because Clang
ignores `#undef` when a definition is provided by `-Dstrncpy(...)=...`.
We workaround that by explictly including the C file from libspl into
the test. This makes things build correctly everywhere.

We add a deprecation warning to `config/Rules.am` and suppress it on the
remaining `strncpy()` usage. `strlcpy()` is not portably avaliable in
tests/zfs-tests/cmd/zfs_diff-socket.c, so we use `snprintf()` there as a
substitute.

This patch does not tackle the related problem of `strcpy()`, which is
even less safe. Thankfully, a quick inspection found that it is used far
more correctly than strncpy() was used. A quick inspection did not find
any problems with `strcpy()` usage outside of zhack, but it should be
said that I only checked around 90% of them.

Lastly, some of the fields in kstat_t varied in size by 1 depending on
whether they were in userspace or in the kernel. The origin of this
discrepancy appears to be 04a479f706 where
it was made for no apparent reason. It conflicts with the comment on
KSTAT_STRLEN, so we shrink the kernel field sizes to match the userspace
field sizes.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13876
2022-09-27 16:35:29 -07:00
Richard Yao 8ef15f9322
Cleanup: Remove ineffective unsigned comparisons against 0
Coverity found a number of places where we either do MAX(unsigned, 0) or
do assertions that a unsigned variable is >= 0. These do nothing, so
let us drop them all.

It also found a spot where we do `if (unsigned >= 0 && ...)`. Let us
also drop the unsigned >= 0 check.

Reviewed-by: Neal Gompa <ngompa@datto.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13871
2022-09-26 17:02:38 -07:00
Richard Yao 52afc3443d
Linux: Fix uninitialized variable usage in zio_do_crypt_data()
Coverity complained about this. An error from `hkdf_sha512()` before uio
initialization will cause pointers to uninitialized memory to be passed
to `zio_crypt_destroy_uio()`. This is a regression that was introduced
by cf63739191. Interestingly, this never
affected FreeBSD, since the FreeBSD version never had that patch ported.
Since moving uio initialization to the top of this function would slow
down the qat_crypt() path, we only move the `memset()` calls to the top
of the function. This is sufficient to fix this problem.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Neal Gompa <ngompa@datto.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13944
2022-09-26 16:44:22 -07:00
youzhongyang 62e2a2881f
Fix minor issues in namespace delegation support
get_user_ns() is only done once for each namespace, so put_user_ns() 
should be done once too.
    
Fix two typos in user_namespace/user_namespace_002.ksh and 
user_namespace/user_namespace_003.ksh.

Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Youzhong Yang <yyang@mathworks.com>
Closes #13918
2022-09-20 15:25:21 -07:00
Richard Yao 891ac937be
Linux: Fix use-after-free in zfsvfs_create()
Coverity reported that we pass a pointer to zfsvfs to
`dmu_objset_disown()` after freeing zfsvfs in zfsvfs_create_impl() after
a failure in zfsvfs_init().

We have nearly identical duplicate versions of this code for FreeBSD and
Linux, but interestingly, the FreeBSD version of this code differs in
such a way that it does not suffer from this bug. We remove the
difference from the FreeBSD version to fix this bug.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13883
2022-09-19 17:30:58 -07:00
Brian Behlendorf 7dee043af5 zfs_enter rework followup
The zpl_fadvise() function was recently added and was not included
in the initial patch.  Update it accordingly.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13831
2022-09-16 14:25:53 -07:00
Chunwei Chen 768eacedef
zfs_enter rework
Replace ZFS_ENTER and ZFS_VERIFY_ZP, which have hidden returns, with
functions that return error code. The reason we want to do this is
because hidden returns are not obvious and had caused some missing fail
path unwinding.

This patch changes the common, linux, and freebsd parts. Also fixes
fail path unwinding in zfs_fsync, zpl_fsync, zpl_xattr_{list,get,set}, and
zfs_lookup().

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Chunwei Chen <david.chen@nutanix.com>
Closes #13831
2022-09-16 13:36:47 -07:00
Richard Yao d5d10f2aef
Cleanup dead spa_boot code
Unused code detected by coverity.

Reviewed-by: Allan Jude <allan@klarasystems.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Neal Gompa <ngompa@datto.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13868
2022-09-13 16:40:10 -07:00
Finix1979 320f0c6022
Add Linux posix_fadvise support
The purpose of this PR is to accepts fadvise ioctl from userland
to do read-ahead by demand.

It could dramatically improve sequential read performance especially
when primarycache is set to metadata or zfs_prefetch_disable is 1.

If the file is mmaped, generic_fadvise is also called for page cache
read-ahead besides dmu_prefetch.

Only POSIX_FADV_WILLNEED and POSIX_FADV_SEQUENTIAL are supported in
this PR currently.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Finix Yan <yancw@info2soft.com>
Closes #13694
2022-09-08 10:29:41 -07:00
Richard Yao 380b08098e
Linux SPL module init: Handle memory allocation failures correctly
Upon inspection of our code, I noticed that we assume that
__alloc_percpu() cannot fail, and while it probably never has failed in
practice, technically, it can fail, so we should handle that.

Additionally, we incorrectly assume that `taskq_create()` in
spl_kmem_cache_init() cannot fail. The same remark applies to it.

Lastly, `spl-init()` failures should always return negative error
values, but in some places, we are returning positive 1, which is
incorrect. We change those values to their correct error codes.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13847
2022-09-08 10:28:20 -07:00
Brian Behlendorf c26045b435 Linux 5.20 compat: blk_cleanup_disk()
As of the Linux 5.20 kernel blk_cleanup_disk() has been removed,
all callers should use put_disk().

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13728
2022-08-04 16:57:49 -07:00
Brian Behlendorf bebdf52a16 Linux 5.20 compat: bdevname()
As of the Linux 5.20 kernel bdevname() has been removed, all
callers should use snprintf() and the "%pg" format specifier.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13728
2022-08-04 16:57:33 -07:00
ixhamza fb087146de
Add support for per dataset zil stats and use wmsum counters
ZIL kstats are reported in an inclusive way, i.e., same counters are
shared to capture all the activities happening in zil. Added support
to report zil stats for every datset individually by combining them
with already exposed dataset kstats.

Wmsum uses per cpu counters and provide less overhead as compared
to atomic operations. Updated zil kstats to replace wmsum counters
to avoid atomic operations.

Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #13636
2022-07-20 17:14:06 -07:00
ixhamza f371cc18f8
Expose ZFS dataset case sensitivity setting via sb_opts
Makes the case sensitivity setting visible on Linux in /proc/mounts.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #13607
2022-07-14 10:38:16 -07:00
Tino Reichardt 1d3ba0bf01
Replace dead opensolaris.org license link
The commit replaces all findings of the link:
http://www.opensolaris.org/os/licensing with this one:
https://opensource.org/licenses/CDDL-1.0

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de>
Closes #13619
2022-07-11 14:16:13 -07:00
Brian Behlendorf e6489be347
Linux: Align MODULE_LICENSE macro text
Specify the lua and zstd license text in the manor in which the
kernel MODULE_LICENSE macro requires it.  The now duplicate entries
were merged and a comment added to make it clear what they apply to.

Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13641
2022-07-11 11:29:12 -07:00
наб dd66857d92 Remaining {=> const} char|void *tag
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13348
2022-06-29 14:08:59 -07:00
наб a926aab902 Enable -Wwrite-strings
Also, fix leak from ztest_global_vars_to_zdb_args()

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13348
2022-06-29 14:08:54 -07:00
gaoyanping e7d90362e5
Fix znode group permission different from acl mask
Zp->z_mode is set at the same time inode->i_mode
is being changed. This has the effect of keeping both
in sync without relying on zfs_znode_update_vfs.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: yanping.gao <yanping.gao@xtaotech.com>
Closes #13581
2022-06-29 13:38:46 -07:00
Andrew f609739985
expose snapshot count via stat(2) of .zfs/snapshot (#13559)
Increase nlinks in stat results of ./zfs/snapshot based on snapshot
count. This provides quick and efficient method for administrators to
get snapshot counts without having to use libzfs or list the snapdir
contents.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Andrew Walker <awalker@ixsystems.com>
Closes #13559
2022-06-17 11:44:49 -07:00
Damian Szuberski 9884319666
Fix clang 13 compilation errors
```
os/linux/zfs/zvol_os.c:1111:3: error: ignoring return value of function
  declared with 'warn_unused_result' attribute [-Werror,-Wunused-result]
                add_disk(zv->zv_zso->zvo_disk);
                ^~~~~~~~ ~~~~~~~~~~~~~~~~~~~~

zpl_xattr.c:1579:1: warning: no previous prototype for function
  'zpl_posix_acl_release_impl' [-Wmissing-prototypes]
```

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #13551
2022-06-15 14:20:28 -07:00
Ryan Moeller 9e605cf155 spl: Use a clearer name for the user namespace fd
This fd has nothing to do with cleanup, that's just the name of the
field in zfs_cmd_t that was used to pass it to the kernel.

Call it what it is, an fd for a user namespace.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Ryan Moeller <freqlabs@FreeBSD.org>
Closes #13554
2022-06-14 08:14:19 -07:00
Will Andrews 4ed5e25074 Add Linux namespace delegation support
This allows ZFS datasets to be delegated to a user/mount namespace
Within that namespace, only the delegated datasets are visible
Works very similarly to Zones/Jailes on other ZFS OSes

As a user:
```
 $ unshare -Um
 $ zfs list
no datasets available
 $ echo $$
1234
```

As root:
```
 # zfs list
NAME                            ZONED  MOUNTPOINT
containers                      off    /containers
containers/host                 off    /containers/host
containers/host/child           off    /containers/host/child
containers/host/child/gchild    off    /containers/host/child/gchild
containers/unpriv               on     /unpriv
containers/unpriv/child         on     /unpriv/child
containers/unpriv/child/gchild  on     /unpriv/child/gchild

 # zfs zone /proc/1234/ns/user containers/unpriv
```

Back to the user namespace:
```
 $ zfs list
NAME                             USED  AVAIL     REFER  MOUNTPOINT
containers                       129M  47.8G       24K  /containers
containers/unpriv                128M  47.8G       24K  /unpriv
containers/unpriv/child          128M  47.8G      128M  /unpriv/child
```

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Will Andrews <will.andrews@klarasystems.com>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>
Co-authored-by: Allan Jude <allan@klarasystems.com>
Co-authored-by: Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>
Sponsored-by: Buddy <https://buddy.works>
Closes #12263
2022-06-10 09:51:46 -07:00
Tony Hutter 6f73d02168
zvol: Support blk-mq for better performance
Add support for the kernel's block multiqueue (blk-mq) interface in
the zvol block driver.  blk-mq creates multiple request queues on
different CPUs rather than having a single request queue.  This can
improve zvol performance with multithreaded reads/writes.

This implementation uses the blk-mq interfaces on 4.13 or newer
kernels.  Building against older kernels will fall back to the
older BIO interfaces.

Note that you must set the `zvol_use_blk_mq` module param to
enable the blk-mq API.  It is disabled by default.

In addition, this commit lets the zvol blk-mq layer process whole
`struct request` IOs at a time, rather than breaking them down
into their individual BIOs.  This reduces dbuf lock contention
and overhead versus the legacy zvol submit_bio() codepath.

	sequential dd to one zvol, 8k volblocksize, no O_DIRECT:

	legacy submit_bio()     292MB/s write  453MB/s read
	this commit             453MB/s write  885MB/s read

It also introduces a new `zvol_blk_mq_chunks_per_thread` module
parameter. This parameter represents how many volblocksize'd chunks
to process per each zvol thread.  It can be used to tune your zvols
for better read vs write performance (higher values favor write,
lower favor read).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #13148
Issue #12483
2022-06-09 08:10:38 -06:00
Brian Behlendorf c2c2e7bb8b Linux 5.19 compat: aops->read_folio()
As of the Linux 5.19 kernel the readpage() address space operation
has been replaced by read_folio().

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13515
2022-05-31 12:04:31 -07:00
Brian Behlendorf a12a5cb5b8 Linux 5.19 compat: blkdev_issue_secure_erase()
Linux 5.19 commit torvalds/linux@44abff2c0 splits the secure
erase functionality from the blkdev_issue_discard() function.
The blkdev_issue_secure_erase() must now be issued to issue
a secure erase.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13515
2022-05-31 12:04:26 -07:00
Brian Behlendorf e2c31f2bc7 Linux 5.19 compat: bdev_max_secure_erase_sectors()
Linux 5.19 commit torvalds/linux@44abff2c0 removed the
blk_queue_secure_erase() helper function.  The preferred
interface is to now use the bdev_max_secure_erase_sectors()
function to check for discard support.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13515
2022-05-31 12:04:22 -07:00
Brian Behlendorf 5e4aedaca7 Linux 5.19 compat: bdev_max_discard_sectors()
Linux 5.19 commit torvalds/linux@70200574cc removed the
blk_queue_discard() helper function.  The preferred interface
is to now use the bdev_max_discard_sectors() function to check
for discard support.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13515
2022-05-31 12:04:17 -07:00
Brian Behlendorf 5f264996f4 Linux 5.18 compat: bio_alloc()
As for the Linux 5.18 kernel bio_alloc() expects a block_device struct
as an argument.  This removes the need for the bio_set_dev() compatibility
code for 5.18 and newer kernels.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13515
2022-05-31 12:04:03 -07:00
наб de82164518 linux: spl: generic: ddi_strto*: match solaris ddi_strto*(9)
Recognise initial whitespace, + in both cases,
and - also in unsigneds

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13434
2022-05-13 10:15:47 -07:00
наб 354a1bfb8e linux: spl: generic: ddi_strtou##type: elide unused flag
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13434
2022-05-13 10:15:44 -07:00
наб c25b281378 Remove hw_serial, ddi_strtoul()
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13434
2022-05-13 10:15:31 -07:00
szubersk e0911f7b7f autoconf: Fail when __copy_from_user_inatomic is a non-GPL symbol
A followup to 849c14e048
Fix https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1009242

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #13389
2022-05-11 10:32:51 -07:00
hping a18d13c200
abd_os: remove redundant refcount creation for abd_children
Refcount creation for abd_zero_scatter->abd_children is redundant in
abd_alloc_zero_scatter, as it has been done in abd_init_struct.

In addition, abd_children is undefined when ZFS_DEBUG is disabled, the
reference of abd_children in abd_alloc_zero_scatter breaks build of
libzpool when ZFS_DEBUG is disabled.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Ping Huang <huangping@smartx.com>
Closes #13429
2022-05-09 16:30:16 -07:00
Aidan Harris 493b6e5607
Fix functions without a prototype
clang-15 emits the following error message for functions without
a prototype:

fs/zfs/os/linux/spl/spl-kmem-cache.c:1423:27: error:
  a function declaration without a prototype is deprecated
  in all versions of C [-Werror,-Wstrict-prototypes]

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Aidan Harris <me@aidanharr.is>
Closes #13421
2022-05-06 11:57:37 -07:00
Shaan Nobee 411f4a018d
Speed up WB_SYNC_NONE when a WB_SYNC_ALL occurs simultaneously
Page writebacks with WB_SYNC_NONE can take several seconds to complete 
since they wait for the transaction group to close before being 
committed. This is usually not a problem since the caller does not 
need to wait. However, if we're simultaneously doing a writeback 
with WB_SYNC_ALL (e.g via msync), the latter can block for several 
seconds (up to zfs_txg_timeout) due to the active WB_SYNC_NONE 
writeback since it needs to wait for the transaction to complete 
and the PG_writeback bit to be cleared.

This commit deals with 2 cases:

- No page writeback is active. A WB_SYNC_ALL page writeback starts 
  and even completes. But when it's about to check if the PG_writeback 
  bit has been cleared, another writeback with WB_SYNC_NONE starts. 
  The sync page writeback ends up waiting for the non-sync page 
  writeback to complete.

- A page writeback with WB_SYNC_NONE is already active when a 
  WB_SYNC_ALL writeback starts. The WB_SYNC_ALL writeback ends up 
  waiting for the WB_SYNC_NONE writeback.

The fix works by carefully keeping track of active sync/non-sync 
writebacks and committing when beneficial.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Shaan Nobee <sniper111@gmail.com>
Closes #12662
Closes #12790
2022-05-03 13:23:26 -07:00
Brian Behlendorf 63b18e4097
Fix O_APPEND for Linux 3.15 and older kernels
When using a Linux kernel which predates the iov_iter interface the
O_APPEND flag should be applied in zpl_aio_write() via the call to
generic_write_checks().  The updated pos variable  was incorrectly
ignored resulting in the current offset being used.

This issue should only realistically impact the RHEL/CentOS 7.x
kernels which are based on Linux 3.10.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13370 
Closes #13377
2022-04-27 12:56:17 -07:00
Satadru Pramanik 7dde17e860
Linux 5.18 compat: replace __set_page_dirty_nobuffers
Replace __set_page_dirty_nobuffers with filemap_dirty_folio.

Upstream-commit: 6b1f86f8e9c7f9de7ca1cb987b2cf25e99b1ae3a
("Merge tag 'folio-5.18b' of
git://git.infradead.org/users/willy/pagecache ")

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Authored-by: Satadru Pramanik <satadru@gmail.com>
Signed-off-by: Satadru Pramanik <satadru@gmail.com>
Closes #13325
Closes #13380
2022-04-27 12:54:17 -07:00
Damian Szuberski 849c14e048
PPC get_user workaround
Linux 5.12 PPC 5.12 get_user() and __copy_from_user_inatomic()
inline helpers very indirectly include a reference to the GPL'd
array mmu_feature_keys[] and fails to build. Workaround this by
using copy_from_user() and throwing EFAULT for any calls to
__copy_from_user_inatomic(). This is a workaround until a fix
for Linux commit 7613f5a66becfd0e43a0f34de8518695888f5458
"powerpc/64s/kuap: Use mmu_has_feature()" is fully addressed.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Authored-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #11958
Closes #12590
Closes #13367
2022-04-26 10:52:40 -07:00
наб 0cdda2edb3 Linux 5.18 compat: kobj_type.default_attrs replaced with default_groups
Upstream-commit: cdb4f26a63c391317e335e6e683a614358e70aeb ("kobject:
 kobj_type: remove default_attrs")
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13357
2022-04-22 14:27:10 -07:00
наб 520a7c8a85 linux: module: zfs: sysfs: constify types and attrs
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13357
2022-04-22 14:27:02 -07:00
Rich Ercolani b657f2c592
Corrected oversight in ZERO_RANGE behavior
It turns out, no, in fact, ZERO_RANGE and PUNCH_HOLE do
have differing semantics in some ways - in particular,
one requires KEEP_SIZE, and the other does not.

Also added a zero-range test to catch this, corrected a flaw
that made the punch-hole test succeed vacuously, and a typo
in file_write.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #13329 
Closes #13338
2022-04-20 16:07:03 -07:00
наб ad9e767657 linux: module: weld all but spl.ko into zfs.ko
Originally it was thought it would be useful to split up the kmods
by functionality.  This would allow external consumers to only load
what was needed.  However, in practice we've never had a case where
this functionality would be needed, and conversely managing multiple
kmods can be awkward.  Therefore, this change merges all but the
spl.ko kmod in to a single zfs.ko kmod.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13274
2022-04-20 13:28:24 -07:00
Brian Behlendorf 026f126b83
Linux 5.17 compat: GENHD_FL_EXT_DEVT / GENHD_FL_NO_PART_SCAN
As of the 5.17 kernel the GENHD_FL_EXT_DEVT flag has been removed
and the GENHD_FL_NO_PART_SCAN flag renamed GENHD_FL_NO_PART. Update
zvol_alloc() to set GENHD_FL_NO_PART for the newer kernels which
is sufficient.  The behavior for prior kernels remains unchanged.

1ebe2e5f ("block: remove GENHD_FL_EXT_DEVT")
46e7eac6 ("block: rename GENHD_FL_NO_PART_SCAN to GENHD_FL_NO_PART")

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13294
Closes #13297
2022-04-19 10:38:04 -07:00
Riccardo Schirone 7d524c068d Linux 5.18 compat: use address_space_operations->readahead
->readpages was removed and replaced by ->readahead. Define
zpl_readahead for kernels that don't have ->readpages.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Riccardo Schirone <rschirone91@gmail.com>
Closes #13278
2022-04-04 09:35:24 -07:00
Riccardo Schirone 036e846abc Linux 5.18 compat: blkg_tryget is moved to private headers
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Riccardo Schirone <rschirone91@gmail.com>
Closes #13278
2022-04-04 09:35:11 -07:00
Andrew eebfd28e9d
Linux optimize access checks when ACL is trivial
Bypass check of ZFS aces if the ACL is trivial. When an ACL is
trivial its permissions are represented by the mode without any
loss of information. In this case, it is safe to convert the
access request into equivalent mode and then pass desired mask
and inode to generic_permission(). This has the added benefit
of also checking whether entries in a POSIX ACL on the file grant
the desired access.

This commit also skips the ACL check on looking up the xattr dir
since such restrictions don't exist in Linux kernel and it makes
xattr lookup behavior inconsistent between SA and file-based
xattrs. We also don't want to perform a POSIX ACL check while
looking up the POSIX ACL if for some reason it is located in
the xattr dir rather than an SA.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Andrew Walker <awalker@ixsystems.com>
Closes #13237
2022-04-01 09:53:54 -07:00
hpingfs 4d04e41e4d
zfs_ctldir: fix incorrect argument type of rw_destroy
The argument type of rw_destroy is (krwlock_t *) while currently
krwlock_t is passed in zfs_ctldir.c. This error is hidden because
rw_destroy is defined as ((void) 0) in linux. But anyway, this
mismatch should be fixed.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ping Huang <huangping@smartx.com>
Closes #13272
2022-03-30 15:40:31 -07:00
hpingfs abdcef47d2
zvol_os: suppress compiler warning for zvol_open_timeout_ms
When HAVE_BLKDEV_GET_ERESTARTSYS is defined, compiler will complain
"defined but not used" warning for zvol_open_timeout_ms.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ping Huang <huangping@smartx.com>
Closes #13270
2022-03-30 15:39:55 -07:00