Return boolean values ("true" or "false") instead of 1 or 0 from bool
functions. This fixes the following warnings from coccicheck:
./fs/nfsd/nfs2acl.c:289:9-10: WARNING: return of 0/1 in function
'nfsaclsvc_encode_accessres' with return type bool
./fs/nfsd/nfs2acl.c:252:9-10: WARNING: return of 0/1 in function
'nfsaclsvc_encode_getaclres' with return type bool
Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
While the original code is valid, it is not the obvious choice for the
sizeof() call and in preparation to limit the scope of the list iterator
variable the sizeof should be changed to the size of the destination.
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
When compiling with -Wformat, clang emits the following warnings:
fs/nfsd/flexfilelayout.c:120:27: warning: format specifies type 'unsigned
char' but the argument has type 'int' [-Wformat]
"%s.%hhu.%hhu", addr, port >> 8, port & 0xff);
~~~~ ^~~~~~~~~
%d
fs/nfsd/flexfilelayout.c:120:38: warning: format specifies type 'unsigned
char' but the argument has type 'int' [-Wformat]
"%s.%hhu.%hhu", addr, port >> 8, port & 0xff);
~~~~ ^~~~~~~~~~~
%d
The types of these arguments are unconditionally defined, so this patch
updates the format character to the correct ones for ints and unsigned
ints.
Link: https://github.com/ClangBuiltLinux/linux/issues/378
Signed-off-by: Bill Wendling <morbo@google.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Tom Haynes <loghyr@hammerspace.com>
Smatch complains:
fs/nfsd/nfsxdr.c:341 nfssvc_decode_writeargs()
warn: no lower bound on 'args->len'
Change the type to unsigned to prevent this issue.
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
These have been incorrect since the function was introduced.
A proper kerneldoc comment is added since this function, though
static, is part of an external interface.
Reported-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The common practice is to name function instances the same as the
method names, but with a uniquifying prefix. Commit aef9583b23
("NFSD: Get reference of lockowner when coping file_lock") missed
this -- the new function names should both have been of the form
"nfsd4_lm_*".
Before more lock manager operations are added in NFSD, rename these
two functions for consistency.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Eventually support for NFSv2 in the Linux NFS server is to be
deprecated and then removed.
However, NFSv2 is the "always supported" version that is available
as soon as CONFIG_NFSD is set. Before NFSv2 support can be removed,
we need to choose a different "always supported" version.
This patch removes CONFIG_NFSD_V3 so that NFSv3 is always supported,
as NFSv2 is today. When NFSv2 support is removed, NFSv3 will become
the only "always supported" NFS version.
The defconfigs still need to be updated to remove CONFIG_NFSD_V3=y.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The nfsd file cache table can be pretty large and its allocation
may require as many as 80 contigious pages.
Employ the same fix that was employed for similar issue that was
reported for the reply cache hash table allocation several years ago
by commit 8f97514b42 ("nfsd: more robust allocation failure handling
in nfsd_reply_cache_init").
Fixes: 65294c1f2c ("nfsd: add a new struct file caching facility to nfsd")
Link: https://lore.kernel.org/linux-nfs/e3cdaeec85a6cfec980e87fc294327c0381c1778.camel@kernel.org/
Suggested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Amir Goldstein <amir73il@gmail.com>
Hoist svo_function back into svc_serv and remove struct
svc_serv_ops, since the struct is now devoid of fields.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
struct svc_serv_ops is about to be removed.
Neil Brown says:
> I suspect svo_module can go as well - I don't think the thread is
> ever the thing that primarily keeps a module active.
A random sample of kthread_create() callers shows sunrpc is the only
one that manages module reference count in this way.
Suggested-by: Neil Brown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Clean up: svc_shutdown_net() now does nothing but call
svc_close_net(). Replace all external call sites.
svc_close_net() is renamed to be the inverse of svc_xprt_create().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Clean up. Neil observed that "any code that calls svc_shutdown_net()
knows what the shutdown function should be, and so can call it
directly."
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: NeilBrown <neilb@suse.de>
We have never been able to track down and address the underlying
cause of the performance issues with workqueue-based service
support. svo_enqueue_xprt is called multiple times per RPC, so
it adds instruction path length, but always ends up at the same
function: svc_xprt_do_enqueue(). We do not anticipate needing
this flexibility for dynamic nfsd thread management support.
As a micro-optimization, remove .svo_enqueue_xprt because
Spectre/Meltdown makes virtual function calls more costly.
This change essentially reverts commit b9e13cdfac ("nfsd/sunrpc:
turn enqueueing a svc_xprt into a svc_serv operation").
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Clean up.
The PROC_ARGS macros were added when I thought that NFSD tracepoints
would be reporting endpoint information. However, tracepoints in the
RPC server now report transport endpoint information, so in general
there's no need for the upper layers to do that any more, and these
macros can be retired.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Move a rarely called function call site out of the hot path.
This is an exceptionally small improvement because the compiler
inlines most of the functions that nfsd_cache_lookup() calls.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Force the compiler to skip unneeded initialization for cases that
don't need those values. For example, NFSv4 COMPOUND operations are
RC_NOCACHE.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Clean up: The details of finding the right hash bucket are exactly
the same in both nfsd_cache_lookup() and nfsd_cache_update().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
For filesystems that supports "btime" timestamp (i.e. most modern
filesystems do) we share it via kernel nfsd. Btime support for NFS
client has already been added by Trond recently.
Suggested-by: Bruce Fields <bfields@fieldses.org>
Signed-off-by: Ondrej Valousek <ondrej.valousek.xm@renesas.com>
[ cel: addressed some whitespace/checkpatch nits ]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
- rtla (Real-Time Linux Analysis tool): fix typo in man page
- rtla: Update API -e to -E before it is released
- rlla: Error message fix and memory leak fix
- Partially uninline trace event soft disable to shrink text
- Fix function graph start up test
- Have triggers affect the trace instance they are in and not top level
- Have osnoise sleep in the units it says it uses
- Remove unused ftrace stub function
- Remove event probe redundant info from event in the buffer
- Fix group ownership setting in tracefs
- Ensure trace buffer is minimum size to prevent crashes
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCYho7XBQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qiOhAQDbCbEjIYwkGCpckuGgSQiMU4bAWUzk
jCz9PoaTxoIWJwEAsLWrAPb0pDzNwdEKjiC3fJoUJhz3NwlEjJ7hQ3BxzAI=
=iXOQ
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
- rtla (Real-Time Linux Analysis tool):
- fix typo in man page
- Update API -e to -E before it is released
- Error message fix and memory leak fix
- Partially uninline trace event soft disable to shrink text
- Fix function graph start up test
- Have triggers affect the trace instance they are in and not top level
- Have osnoise sleep in the units it says it uses
- Remove unused ftrace stub function
- Remove event probe redundant info from event in the buffer
- Fix group ownership setting in tracefs
- Ensure trace buffer is minimum size to prevent crashes
* tag 'trace-v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
rtla/osnoise: Fix error message when failing to enable trace instance
rtla/osnoise: Free params at the exit
rtla/hist: Make -E the short version of --entries
tracing: Fix selftest config check for function graph start up test
tracefs: Set the group ownership in apply_options() not parse_options()
tracing/osnoise: Make osnoise_main to sleep for microseconds
ftrace: Remove unused ftrace_startup_enable() stub
tracing: Ensure trace buffer is at least 4096 bytes large
tracing: Uninline trace_trigger_soft_disabled() partly
eprobes: Remove redundant event type information
tracing: Have traceon and traceoff trigger honor the instance
tracing: Dump stacktrace trigger to the corresponding instance
rtla: Fix systme -> system typo on man page
- Only call sync_filesystem when we're remounting the filesystem
readonly readonly, and actually check its return value.
-----BEGIN PGP SIGNATURE-----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=6ODm
-----END PGP SIGNATURE-----
Merge tag 'xfs-5.17-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"Nothing exciting, just more fixes for not returning sync_filesystem
error values (and eliding it when it's not necessary).
Summary:
- Only call sync_filesystem when we're remounting the filesystem
readonly readonly, and actually check its return value"
* tag 'xfs-5.17-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: only bother with sync_filesystem during readonly remount
Al Viro brought it to my attention that the dentries may not be filled
when the parse_options() is called, causing the call to set_gid() to
possibly crash. It should only be called if parse_options() succeeds
totally anyway.
He suggested the logical place to do the update is in apply_options().
Link: https://lore.kernel.org/all/20220225165219.737025658@goodmis.org/
Link: https://lkml.kernel.org/r/20220225153426.1c4cab6b@gandalf.local.home
Cc: stable@vger.kernel.org
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 48b27b6b51 ("tracefs: Set all files to the same group ownership as the mount option")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
- fix a race in configfs_{,un}register_subsystem (ChenXiaoSong)
-----BEGIN PGP SIGNATURE-----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=1JKy
-----END PGP SIGNATURE-----
Merge tag 'configfs-5.17-2022-02-25' of git://git.infradead.org/users/hch/configfs
Pull configfs fix from Christoph Hellwig:
- fix a race in configfs_{,un}register_subsystem (ChenXiaoSong)
* tag 'configfs-5.17-2022-02-25' of git://git.infradead.org/users/hch/configfs:
configfs: fix a race in configfs_{,un}register_subsystem()
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEE8rQSAMVO+zA4DBdWxWXV+ddtWDsFAmIY790ACgkQxWXV+ddt
WDvKxA//ctgUNhKEPOfJlmmaKAVRgrE6FfDgfk6c2v/PrpPFH0U9+frishcsImxu
XAObMCyPY7PfLDnk6I0Lmxm+8T56+NNGjbxq7/R1Uv0DJm75f51OJbr/H7NSjVfu
g6IyPmIft7jmt7Vp9lPyYcPNDTFyG+XARdWYS3AFtAfr2MfXgjx9AALxFjaytbLi
AevXP0qEkbLHv5npEG56pouhn44J/8GZKeUGM1crNNUDQoYpgreifZ2SHpLIfxP5
lvzrA1noaZSFS3Cth7NBPhHTFS2tiMb96bHFdF56A2EIq5vAXQF7w6IAUlvBEVoR
5XgWsxGfsv5FbdFmyrRIvOh6gGHwHw8BH5/ZRTRRVuRZAPKPY0oiJ9OJk5kIBCgo
LiYksqRTOs0Zp/e5wn/8d/UGp2A6mujxwqw7gLcOZBzfhKw7QIha6BM64BfJxBni
3dakBDCWZ/X+Kje+WaM4Sev7JUIyDVoKWClHrvzoLeEzdIgruNguMnQ+3yOZBFiG
4YRTPUeafAj0OspJ0LLG01X4NJVmnQVAFoKuFOsGbUsxeCaQ9vF3/IGTlhgkwehf
KjvE9nzl9DewpvRRd7AAirj5FncuwRw6KNci1gBBixxPaveBClCIuuyfx6lXPusK
sIF3eb7xcqKYLh0iYPd2XMZInXbWXIGuJoVG/Gu1IYm1OXAFQ5A=
=q/NS
-----END PGP SIGNATURE-----
Merge tag 'for-5.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"This is a hopefully last batch of fixes for defrag that got broken in
5.16, all stable material.
The remaining reported problem is excessive IO with autodefrag due to
various conditions in the defrag code not met or missing"
* tag 'for-5.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: reduce extent threshold for autodefrag
btrfs: autodefrag: only scan one inode once
btrfs: defrag: don't use merged extent map for their generation check
btrfs: defrag: bring back the old file extent search behavior
btrfs: defrag: remove an ambiguous condition for rejection
btrfs: defrag: don't defrag extents which are already at max capacity
btrfs: defrag: don't try to merge regular extents with preallocated extents
btrfs: defrag: allow defrag_one_cluster() to skip large extent which is not a target
btrfs: prevent copying too big compressed lzo segment
-----BEGIN PGP SIGNATURE-----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=6TsN
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.17-2022-02-23' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
- Add a conditional schedule point in io_add_buffers() (Eric)
- Fix for a quiesce speedup merged in this release (Dylan)
- Don't convert to jiffies for event timeout waiting, it's way too
coarse when we accept a timespec as input (me)
* tag 'io_uring-5.17-2022-02-23' of git://git.kernel.dk/linux-block:
io_uring: disallow modification of rsrc_data during quiesce
io_uring: don't convert to jiffies for waiting on timeouts
io_uring: add a schedule point in io_add_buffers()
There is a big gap between inode_should_defrag() and autodefrag extent
size threshold. For inode_should_defrag() it has a flexible
@small_write value. For compressed extent is 16K, and for non-compressed
extent it's 64K.
However for autodefrag extent size threshold, it's always fixed to the
default value (256K).
This means, the following write sequence will trigger autodefrag to
defrag ranges which didn't trigger autodefrag:
pwrite 0 8k
sync
pwrite 8k 128K
sync
The latter 128K write will also be considered as a defrag target (if
other conditions are met). While only that 8K write is really
triggering autodefrag.
Such behavior can cause extra IO for autodefrag.
Close the gap, by copying the @small_write value into inode_defrag, so
that later autodefrag can use the same @small_write value which
triggered autodefrag.
With the existing transid value, this allows autodefrag really to scan
the ranges which triggered autodefrag.
Although this behavior change is mostly reducing the extent_thresh value
for autodefrag, I believe in the future we should allow users to specify
the autodefrag extent threshold through mount options, but that's an
other problem to consider in the future.
CC: stable@vger.kernel.org # 5.16+
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Although we have btrfs_requeue_inode_defrag(), for autodefrag we are
still just exhausting all inode_defrag items in the tree.
This means, it doesn't make much difference to requeue an inode_defrag,
other than scan the inode from the beginning till its end.
Change the behaviour to always scan from offset 0 of an inode, and till
the end.
By this we get the following benefit:
- Straight-forward code
- No more re-queue related check
- Fewer members in inode_defrag
We still keep the same btrfs_get_fs_root() and btrfs_iget() check for
each loop, and added extra should_auto_defrag() check per-loop.
Note: the patch needs to be backported and is intentionally written
to minimize the diff size, code will be cleaned up later.
CC: stable@vger.kernel.org # 5.16
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
For extent maps, if they are not compressed extents and are adjacent by
logical addresses and file offsets, they can be merged into one larger
extent map.
Such merged extent map will have the higher generation of all the
original ones.
But this brings a problem for autodefrag, as it relies on accurate
extent_map::generation to determine if one extent should be defragged.
For merged extent maps, their higher generation can mark some older
extents to be defragged while the original extent map doesn't meet the
minimal generation threshold.
Thus this will cause extra IO.
So solve the problem, here we introduce a new flag, EXTENT_FLAG_MERGED,
to indicate if the extent map is merged from one or more ems.
And for autodefrag, if we find a merged extent map, and its generation
meets the generation requirement, we just don't use this one, and go
back to defrag_get_extent() to read extent maps from subvolume trees.
This could cause more read IO, but should result less defrag data write,
so in the long run it should be a win for autodefrag.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
For defrag, we don't really want to use btrfs_get_extent() to iterate
all extent maps of an inode.
The reasons are:
- btrfs_get_extent() can merge extent maps
And the result em has the higher generation of the two, causing defrag
to mark unnecessary part of such merged large extent map.
This in fact can result extra IO for autodefrag in v5.16+ kernels.
However this patch is not going to completely solve the problem, as
one can still using read() to trigger extent map reading, and got
them merged.
The completely solution for the extent map merging generation problem
will come as an standalone fix.
- btrfs_get_extent() caches the extent map result
Normally it's fine, but for defrag the target range may not get
another read/write for a long long time.
Such cache would only increase the memory usage.
- btrfs_get_extent() doesn't skip older extent map
Unlike the old find_new_extent() which uses btrfs_search_forward() to
skip the older subtree, thus it will pick up unnecessary extent maps.
This patch will fix the regression by introducing defrag_get_extent() to
replace the btrfs_get_extent() call.
This helper will:
- Not cache the file extent we found
It will search the file extent and manually convert it to em.
- Use btrfs_search_forward() to skip entire ranges which is modified in
the past
This should reduce the IO for autodefrag.
Reported-by: Filipe Manana <fdmanana@suse.com>
Fixes: 7b508037d4 ("btrfs: defrag: use defrag_one_cluster() to implement btrfs_defrag_file()")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
From the very beginning of btrfs defrag, there is a check to reject
extents which meet both conditions:
- Physically adjacent
We may want to defrag physically adjacent extents to reduce the number
of extents or the size of subvolume tree.
- Larger than 128K
This may be there for compressed extents, but unfortunately 128K is
exactly the max capacity for compressed extents.
And the check is > 128K, thus it never rejects compressed extents.
Furthermore, the compressed extent capacity bug is fixed by previous
patch, there is no reason for that check anymore.
The original check has a very small ranges to reject (the target extent
size is > 128K, and default extent threshold is 256K), and for
compressed extent it doesn't work at all.
So it's better just to remove the rejection, and allow us to defrag
physically adjacent extents.
CC: stable@vger.kernel.org # 5.16
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
For compressed extents, defrag ioctl will always try to defrag any
compressed extents, wasting not only IO but also CPU time to
compress/decompress:
mkfs.btrfs -f $DEV
mount -o compress $DEV $MNT
xfs_io -f -c "pwrite -S 0xab 0 128K" $MNT/foobar
sync
xfs_io -f -c "pwrite -S 0xcd 128K 128K" $MNT/foobar
sync
echo "=== before ==="
xfs_io -c "fiemap -v" $MNT/foobar
btrfs filesystem defrag $MNT/foobar
sync
echo "=== after ==="
xfs_io -c "fiemap -v" $MNT/foobar
Then it shows the 2 128K extents just get COW for no extra benefit, with
extra IO/CPU spent:
=== before ===
/mnt/btrfs/file1:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..255]: 26624..26879 256 0x8
1: [256..511]: 26632..26887 256 0x9
=== after ===
/mnt/btrfs/file1:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..255]: 26640..26895 256 0x8
1: [256..511]: 26648..26903 256 0x9
This affects not only v5.16 (after the defrag rework), but also v5.15
(before the defrag rework).
[CAUSE]
From the very beginning, btrfs defrag never checks if one extent is
already at its max capacity (128K for compressed extents, 128M
otherwise).
And the default extent size threshold is 256K, which is already beyond
the compressed extent max size.
This means, by default btrfs defrag ioctl will mark all compressed
extent which is not adjacent to a hole/preallocated range for defrag.
[FIX]
Introduce a helper to grab the maximum extent size, and then in
defrag_collect_targets() and defrag_check_next_extent(), reject extents
which are already at their max capacity.
Reported-by: Filipe Manana <fdmanana@suse.com>
CC: stable@vger.kernel.org # 5.16
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
With older kernels (before v5.16), btrfs will defrag preallocated extents.
While with newer kernels (v5.16 and newer) btrfs will not defrag
preallocated extents, but it will defrag the extent just before the
preallocated extent, even it's just a single sector.
This can be exposed by the following small script:
mkfs.btrfs -f $dev > /dev/null
mount $dev $mnt
xfs_io -f -c "pwrite 0 4k" -c sync -c "falloc 4k 16K" $mnt/file
xfs_io -c "fiemap -v" $mnt/file
btrfs fi defrag $mnt/file
sync
xfs_io -c "fiemap -v" $mnt/file
The output looks like this on older kernels:
/mnt/btrfs/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..7]: 26624..26631 8 0x0
1: [8..39]: 26632..26663 32 0x801
/mnt/btrfs/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..39]: 26664..26703 40 0x1
Which defrags the single sector along with the preallocated extent, and
replace them with an regular extent into a new location (caused by data
COW).
This wastes most of the data IO just for the preallocated range.
On the other hand, v5.16 is slightly better:
/mnt/btrfs/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..7]: 26624..26631 8 0x0
1: [8..39]: 26632..26663 32 0x801
/mnt/btrfs/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..7]: 26664..26671 8 0x0
1: [8..39]: 26632..26663 32 0x801
The preallocated range is not defragged, but the sector before it still
gets defragged, which has no need for it.
[CAUSE]
One of the function reused by the old and new behavior is
defrag_check_next_extent(), it will determine if we should defrag
current extent by checking the next one.
It only checks if the next extent is a hole or inlined, but it doesn't
check if it's preallocated.
On the other hand, out of the function, both old and new kernel will
reject preallocated extents.
Such inconsistent behavior causes above behavior.
[FIX]
- Also check if next extent is preallocated
If so, don't defrag current extent.
- Add comments for each branch why we reject the extent
This will reduce the IO caused by defrag ioctl and autodefrag.
CC: stable@vger.kernel.org # 5.16
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When configfs_register_subsystem() or configfs_unregister_subsystem()
is executing link_group() or unlink_group(),
it is possible that two processes add or delete list concurrently.
Some unfortunate interleavings of them can cause kernel panic.
One of cases is:
A --> B --> C --> D
A <-- B <-- C <-- D
delete list_head *B | delete list_head *C
--------------------------------|-----------------------------------
configfs_unregister_subsystem | configfs_unregister_subsystem
unlink_group | unlink_group
unlink_obj | unlink_obj
list_del_init | list_del_init
__list_del_entry | __list_del_entry
__list_del | __list_del
// next == C |
next->prev = prev |
| next->prev = prev
prev->next = next |
| // prev == B
| prev->next = next
Fix this by adding mutex when calling link_group() or unlink_group(),
but parent configfs_subsystem is NULL when config_item is root.
So I create a mutex configfs_subsystem_mutex.
Fixes: 7063fbf226 ("[PATCH] configfs: User-driven configuration filesystem")
Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Signed-off-by: Laibin Qiu <qiulaibin@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
io_rsrc_ref_quiesce will unlock the uring while it waits for references to
the io_rsrc_data to be killed.
There are other places to the data that might add references to data via
calls to io_rsrc_node_switch.
There is a race condition where this reference can be added after the
completion has been signalled. At this point the io_rsrc_ref_quiesce call
will wake up and relock the uring, assuming the data is unused and can be
freed - although it is actually being used.
To fix this check in io_rsrc_ref_quiesce if a resource has been revived.
Reported-by: syzbot+ca8bf833622a1662745b@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220222161751.995746-1-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If an application calls io_uring_enter(2) with a timespec passed in,
convert that timespec to ktime_t rather than jiffies. The latter does
not provide the granularity the application may expect, and may in
fact provided different granularity on different systems, depending
on what the HZ value is configured at.
Turn the timespec into an absolute ktime_t, and use that with
schedule_hrtimeout() instead.
Link: https://github.com/axboe/liburing/issues/531
Cc: stable@vger.kernel.org
Reported-by: Bob Chen <chenbo.chen@alibaba-inc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCYhDJyQAKCRCRxhvAZXjc
oqDZAP47lp7dQhndp5AuIsoeL/YIqbhFNfJ8hVUAcbFx/wJPFAEAtwXoeVXWT2ms
pU4nafoaQOpgsZJnD0UC5B/Pkr6laQ4=
=N5oo
-----END PGP SIGNATURE-----
Merge tag 'fs.mount_setattr.v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull mount_setattr test/doc fixes from Christian Brauner:
"This contains a fix for one of the selftests for the mount_setattr
syscall to create idmapped mounts, an entry for idmapped mounts for
maintainers, and missing kernel documentation for the helper we split
out some time ago to get and yield write access to a mount when
changing mount properties"
* tag 'fs.mount_setattr.v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
fs: add kernel doc for mnt_{hold,unhold}_writers()
MAINTAINERS: add entry for idmapped mounts
tests: fix idmapped mount_setattr test
- Other Fixes:
- Fix unnecessary changeattr revalidations
- Fix resolving symlinks during directory lookups
- Don't report writeback errors in nfs_getattr()
-----BEGIN PGP SIGNATURE-----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=PgPr
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-5.17-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client bugfixes from Anna Schumaker:
- Fix unnecessary changeattr revalidations
- Fix resolving symlinks during directory lookups
- Don't report writeback errors in nfs_getattr()
* tag 'nfs-for-5.17-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
NFS: Do not report writeback errors in nfs_getattr()
NFS: LOOKUP_DIRECTORY is also ok with symlinks
NFS: Remove an incorrect revalidation in nfs4_update_changeattr_locked()
-----BEGIN PGP SIGNATURE-----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=Nwq6
-----END PGP SIGNATURE-----
Merge tag '5.17-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Six small smb3 client fixes, three for stable:
- fix for snapshot mount option
- two ACL related fixes
- use after free race fix
- fix for confusing warning message logged with older dialects"
* tag '5.17-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: fix confusing unneeded warning message on smb2.1 and earlier
cifs: modefromsids must add an ACE for authenticated users
cifs: fix double free race when mount fails in cifs_get_root()
cifs: do not use uninitialized data in the owner/group sid
cifs: fix set of group SID via NTSD xattrs
smb3: fix snapshot mount option
Commit b42bc9a3c5 ("Fix regression due to "fs: move binfmt_misc sysctl
to its own file") fixed a regression, however it failed to add a
kmemleak_not_leak().
Fixes: b42bc9a3c5 ("Fix regression due to "fs: move binfmt_misc sysctl to its own file")
Reported-by: Tong Zhang <ztong0001@gmail.com>
Cc: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When mounting with SMB2.1 or earlier, even with nomultichannel, we
log the confusing warning message:
"CIFS: VFS: multichannel is not supported on this protocol version, use 3.0 or above"
Fix this so that we don't log this unless they really are trying
to mount with multichannel.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215608
Reported-by: Kim Scarborough <kim@scarborough.kim>
Cc: stable@vger.kernel.org # 5.11+
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
The result of the writeback, whether it is an ENOSPC or an EIO, or
anything else, does not inhibit the NFS client from reporting the
correct file timestamps.
Fixes: 79566ef018 ("NFS: Getattr doesn't require data sync semantics")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
In the rework of btrfs_defrag_file(), we always call
defrag_one_cluster() and increase the offset by cluster size, which is
only 256K.
But there are cases where we have a large extent (e.g. 128M) which
doesn't need to be defragged at all.
Before the refactor, we can directly skip the range, but now we have to
scan that extent map again and again until the cluster moves after the
non-target extent.
Fix the problem by allow defrag_one_cluster() to increase
btrfs_defrag_ctrl::last_scanned to the end of an extent, if and only if
the last extent of the cluster is not a target.
The test script looks like this:
mkfs.btrfs -f $dev > /dev/null
mount $dev $mnt
# As btrfs ioctl uses 32M as extent_threshold
xfs_io -f -c "pwrite 0 64M" $mnt/file1
sync
# Some fragemented range to defrag
xfs_io -s -c "pwrite 65548k 4k" \
-c "pwrite 65544k 4k" \
-c "pwrite 65540k 4k" \
-c "pwrite 65536k 4k" \
$mnt/file1
sync
echo "=== before ==="
xfs_io -c "fiemap -v" $mnt/file1
echo "=== after ==="
btrfs fi defrag $mnt/file1
sync
xfs_io -c "fiemap -v" $mnt/file1
umount $mnt
With extra ftrace put into defrag_one_cluster(), before the patch it
would result tons of loops:
(As defrag_one_cluster() is inlined, the function name is its caller)
btrfs-126062 [005] ..... 4682.816026: btrfs_defrag_file: r/i=5/257 start=0 len=262144
btrfs-126062 [005] ..... 4682.816027: btrfs_defrag_file: r/i=5/257 start=262144 len=262144
btrfs-126062 [005] ..... 4682.816028: btrfs_defrag_file: r/i=5/257 start=524288 len=262144
btrfs-126062 [005] ..... 4682.816028: btrfs_defrag_file: r/i=5/257 start=786432 len=262144
btrfs-126062 [005] ..... 4682.816028: btrfs_defrag_file: r/i=5/257 start=1048576 len=262144
...
btrfs-126062 [005] ..... 4682.816043: btrfs_defrag_file: r/i=5/257 start=67108864 len=262144
But with this patch there will be just one loop, then directly to the
end of the extent:
btrfs-130471 [014] ..... 5434.029558: defrag_one_cluster: r/i=5/257 start=0 len=262144
btrfs-130471 [014] ..... 5434.029559: defrag_one_cluster: r/i=5/257 start=67108864 len=16384
CC: stable@vger.kernel.org # 5.16
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
-----BEGIN PGP SIGNATURE-----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=AqU+
-----END PGP SIGNATURE-----
Merge tag 'for-5.17-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
- yield CPU more often when defragmenting a large file
- skip defragmenting extents already under writeback
- improve error message when send fails to write file data
- get rid of warning when mounted with 'flushoncommit'
* tag 'for-5.17-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: send: in case of IO error log it
btrfs: get rid of warning on transaction commit when using flushoncommit
btrfs: defrag: don't try to defrag extents which are under writeback
btrfs: don't hold CPU for too long when defragging a file
Commit ac795161c9 (NFSv4: Handle case where the lookup of a directory
fails) [1], part of Linux since 5.17-rc2, introduced a regression, where
a symbolic link on an NFS mount to a directory on another NFS does not
resolve(?) the first time it is accessed:
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Fixes: ac795161c9 ("NFSv4: Handle case where the lookup of a directory fails")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Tested-by: Donald Buczek <buczek@molgen.mpg.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
In nfs4_update_changeattr_locked(), we don't need to set the
NFS_INO_REVAL_PAGECACHE flag, because we already know the value of the
change attribute, and we're already flagging the size. In fact, this
forces us to revalidate the change attribute a second time for no good
reason.
This extra flag appears to have been introduced as part of the xattr
feature, when update_changeattr_locked() was converted for use by the
xattr code.
Fixes: 1b523ca972 ("nfs: modify update_changeattr to deal with regular files")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
When we create a file with modefromsids we set an ACL that
has one ACE for the magic modefromsid as well as a second ACE that
grants full access to all authenticated users.
When later we chante the mode on the file we strip away this, and other,
ACE for authenticated users in set_chmod_dacl() and then just add back/update
the modefromsid ACE.
Thus leaving the file with a single ACE that is for the mode and no ACE
to grant any user any rights to access the file.
Fix this by always adding back also the modefromsid ACE so that we do not
drop the rights to access the file.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
