License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 15:07:57 +01:00
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2005-04-16 15:20:36 -07:00
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2007-06-04 09:59:47 +02:00
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2014-11-07 14:44:26 -05:00
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2005-04-16 15:20:36 -07:00
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[PATCH] inotify
inotify is intended to correct the deficiencies of dnotify, particularly
its inability to scale and its terrible user interface:
* dnotify requires the opening of one fd per each directory
that you intend to watch. This quickly results in too many
open files and pins removable media, preventing unmount.
* dnotify is directory-based. You only learn about changes to
directories. Sure, a change to a file in a directory affects
the directory, but you are then forced to keep a cache of
stat structures.
* dnotify's interface to user-space is awful. Signals?
inotify provides a more usable, simple, powerful solution to file change
notification:
* inotify's interface is a system call that returns a fd, not SIGIO.
You get a single fd, which is select()-able.
* inotify has an event that says "the filesystem that the item
you were watching is on was unmounted."
* inotify can watch directories or files.
Inotify is currently used by Beagle (a desktop search infrastructure),
Gamin (a FAM replacement), and other projects.
See Documentation/filesystems/inotify.txt.
Signed-off-by: Robert Love <rml@novell.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-12 17:06:03 -04:00
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2005-04-16 15:20:36 -07:00
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2009-12-03 20:30:56 +02:00
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2022-02-13 17:23:58 -05:00
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 17:04:11 +09:00
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2016-12-24 11:46:01 -08:00
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2010-02-17 14:05:11 -06:00
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2013-05-02 13:19:10 -04:00
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2025-05-06 16:42:25 -04:00
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nfsd: Report export case-folding via NFSv3 PATHCONF
The hard-coded MSDOS_SUPER_MAGIC check in nfsd3_proc_pathconf()
only recognizes FAT filesystems as case-insensitive. Modern
filesystems like F2FS, exFAT, and CIFS support case-insensitive
directories, but NFSv3 clients cannot discover this capability.
Query the export's actual case behavior through ->fileattr_get
instead. This allows NFSv3 clients to correctly handle case
sensitivity for any filesystem that implements the fileattr
interface. Filesystems without ->fileattr_get continue to report
the default POSIX behavior (case-sensitive, case-preserving).
This change depends on the earlier "fat: Implement fileattr_get
for case sensitivity" patch in this series, which ensures FAT
filesystems report their case behavior correctly via the
fileattr interface.
Case-folding is a per-directory property, so
nfsd_get_case_info() queries the parent dentry for
non-directory filehandles. Three inherent corner cases follow:
a single-file export's parent lies outside the exported
subtree, so the LSM hook evaluates against an unexported
directory; a disconnected dentry from fh_verify() has
d_parent == itself, so the file's own attributes are reported
until the dentry connects; and a hardlinked file resolves
through the alias the dcache currently holds, so when the
inode is linked into both case-folded and case-sensitive
directories the reported value tracks whichever parent is
active. These limitations are not addressable without
redefining the protocol attribute as per-parent rather than
per-object.
RFC 1813 restricts PATHCONF errors to NFS3ERR_STALE,
NFS3ERR_BADHANDLE, and NFS3ERR_SERVERFAULT. When an LSM hook
denies the case-folding query on the parent, NFS3ERR_STALE is
the only correct mapping: NFS3ERR_SERVERFAULT misrepresents a
working server as broken, and NFS3ERR_BADHANDLE implies a
decoding failure that did not occur. A client purging the
filehandle on receipt is the desired outcome, since the server
has refused to read attributes through it. Substituting POSIX
defaults instead would let the same handle report
casefold=false now and casefold=true once policy permits,
opening a silent name-collision window on case-insensitive
exports.
Reviewed-by: Roland Mainz <roland.mainz@nrubsig.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260507-case-sensitivity-v14-13-e62cc8200435@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-05-07 04:53:06 -04:00
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2009-12-03 20:30:56 +02:00
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2006-01-09 20:51:55 -08:00
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2011-01-04 17:37:15 -05:00
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2021-12-18 20:38:00 -05:00
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2005-04-16 15:20:36 -07:00
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2009-12-03 20:30:56 +02:00
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2019-08-18 14:18:49 -04:00
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2015-11-17 06:52:23 -05:00
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2005-04-16 15:20:36 -07:00
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2025-03-08 15:14:38 -05:00
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2025-09-06 17:25:11 -04:00
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2025-03-08 15:14:38 -05:00
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2022-10-18 07:47:55 -04:00
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2024-08-17 14:27:13 +08:00
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2022-10-18 07:47:55 -04:00
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2005-04-16 15:20:36 -07:00
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2006-12-13 00:35:25 -08:00
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2005-04-16 15:20:36 -07:00
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2009-04-18 02:42:05 -04:00
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2022-12-07 09:43:08 +01:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2022-12-07 09:43:08 +01:00
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Add a dentry op to allow processes to be held during pathwalk transit
Add a dentry op (d_manage) to permit a filesystem to hold a process and make it
sleep when it tries to transit away from one of that filesystem's directories
during a pathwalk. The operation is keyed off a new dentry flag
(DCACHE_MANAGE_TRANSIT).
The filesystem is allowed to be selective about which processes it holds and
which it permits to continue on or prohibits from transiting from each flagged
directory. This will allow autofs to hold up client processes whilst letting
its userspace daemon through to maintain the directory or the stuff behind it
or mounted upon it.
The ->d_manage() dentry operation:
int (*d_manage)(struct path *path, bool mounting_here);
takes a pointer to the directory about to be transited away from and a flag
indicating whether the transit is undertaken by do_add_mount() or
do_move_mount() skipping through a pile of filesystems mounted on a mountpoint.
It should return 0 if successful and to let the process continue on its way;
-EISDIR to prohibit the caller from skipping to overmounted filesystems or
automounting, and to use this directory; or some other error code to return to
the user.
->d_manage() is called with namespace_sem writelocked if mounting_here is true
and no other locks held, so it may sleep. However, if mounting_here is true,
it may not initiate or wait for a mount or unmount upon the parameter
directory, even if the act is actually performed by userspace.
Within fs/namei.c, follow_managed() is extended to check with d_manage() first
on each managed directory, before transiting away from it or attempting to
automount upon it.
follow_down() is renamed follow_down_one() and should only be used where the
filesystem deliberately intends to avoid management steps (e.g. autofs).
A new follow_down() is added that incorporates the loop done by all other
callers of follow_down() (do_add/move_mount(), autofs and NFSD; whilst AFS, NFS
and CIFS do use it, their use is removed by converting them to use
d_automount()). The new follow_down() calls d_manage() as appropriate. It
also takes an extra parameter to indicate if it is being called from mount code
(with namespace_sem writelocked) which it passes to d_manage(). follow_down()
ignores automount points so that it can be used to mount on them.
__follow_mount_rcu() is made to abort rcu-walk mode if it hits a directory with
DCACHE_MANAGE_TRANSIT set on the basis that we're probably going to have to
sleep. It would be possible to enter d_manage() in rcu-walk mode too, and have
that determine whether to abort or not itself. That would allow the autofs
daemon to continue on in rcu-walk mode.
Note that DCACHE_MANAGE_TRANSIT on a directory should be cleared when it isn't
required as every tranist from that directory will cause d_manage() to be
invoked. It can always be set again when necessary.
==========================
WHAT THIS MEANS FOR AUTOFS
==========================
Autofs currently uses the lookup() inode op and the d_revalidate() dentry op to
trigger the automounting of indirect mounts, and both of these can be called
with i_mutex held.
autofs knows that the i_mutex will be held by the caller in lookup(), and so
can drop it before invoking the daemon - but this isn't so for d_revalidate(),
since the lock is only held on _some_ of the code paths that call it. This
means that autofs can't risk dropping i_mutex from its d_revalidate() function
before it calls the daemon.
The bug could manifest itself as, for example, a process that's trying to
validate an automount dentry that gets made to wait because that dentry is
expired and needs cleaning up:
mkdir S ffffffff8014e05a 0 32580 24956
Call Trace:
[<ffffffff885371fd>] :autofs4:autofs4_wait+0x674/0x897
[<ffffffff80127f7d>] avc_has_perm+0x46/0x58
[<ffffffff8009fdcf>] autoremove_wake_function+0x0/0x2e
[<ffffffff88537be6>] :autofs4:autofs4_expire_wait+0x41/0x6b
[<ffffffff88535cfc>] :autofs4:autofs4_revalidate+0x91/0x149
[<ffffffff80036d96>] __lookup_hash+0xa0/0x12f
[<ffffffff80057a2f>] lookup_create+0x46/0x80
[<ffffffff800e6e31>] sys_mkdirat+0x56/0xe4
versus the automount daemon which wants to remove that dentry, but can't
because the normal process is holding the i_mutex lock:
automount D ffffffff8014e05a 0 32581 1 32561
Call Trace:
[<ffffffff80063c3f>] __mutex_lock_slowpath+0x60/0x9b
[<ffffffff8000ccf1>] do_path_lookup+0x2ca/0x2f1
[<ffffffff80063c89>] .text.lock.mutex+0xf/0x14
[<ffffffff800e6d55>] do_rmdir+0x77/0xde
[<ffffffff8005d229>] tracesys+0x71/0xe0
[<ffffffff8005d28d>] tracesys+0xd5/0xe0
which means that the system is deadlocked.
This patch allows autofs to hold up normal processes whilst the daemon goes
ahead and does things to the dentry tree behind the automouter point without
risking a deadlock as almost no locks are held in d_manage() and none in
d_automount().
Signed-off-by: David Howells <dhowells@redhat.com>
Was-Acked-by: Ian Kent <raven@themaw.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-14 18:45:26 +00:00
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NFS: don't try to cross a mountpount when there isn't one there.
consider the sequence of commands:
mkdir -p /import/nfs /import/bind /import/etc
mount --bind / /import/bind
mount --make-private /import/bind
mount --bind /import/etc /import/bind/etc
exportfs -o rw,no_root_squash,crossmnt,async,no_subtree_check localhost:/
mount -o vers=4 localhost:/ /import/nfs
ls -l /import/nfs/etc
You would not expect this to report a stale file handle.
Yet it does.
The manipulations under /import/bind cause the dentry for
/etc to get the DCACHE_MOUNTED flag set, even though nothing
is mounted on /etc. This causes nfsd to call
nfsd_cross_mnt() even though there is no mountpoint. So an
upcall to mountd for "/etc" is performed.
The 'crossmnt' flag on the export of / causes mountd to
report that /etc is exported as it is a descendant of /. It
assumes the kernel wouldn't ask about something that wasn't
a mountpoint. The filehandle returned identifies the
filesystem and the inode number of /etc.
When this filehandle is presented to rpc.mountd, via
"nfsd.fh", the inode cannot be found associated with any
name in /etc/exports, or with any mountpoint listed by
getmntent(). So rpc.mountd says the filehandle doesn't
exist. Hence ESTALE.
This is fixed by teaching nfsd not to trust DCACHE_MOUNTED
too much. It is just a hint, not a guarantee.
Change nfsd_mountpoint() to return '1' for a certain mountpoint,
'2' for a possible mountpoint, and 0 otherwise.
Then change nfsd_crossmnt() to check if follow_down()
actually found a mountpount and, if not, to avoid performing
a lookup if the location is not known to certainly require
an export-point.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2017-03-15 12:40:44 +11:00
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2005-04-16 15:20:36 -07:00
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2009-04-18 02:42:05 -04:00
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2005-04-16 15:20:36 -07:00
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2009-10-25 21:18:19 -04:00
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2009-04-18 02:42:05 -04:00
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2005-04-16 15:20:36 -07:00
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2009-09-09 15:02:40 -04:00
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2005-04-16 15:20:36 -07:00
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2009-04-18 02:32:31 -04:00
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2009-04-18 02:42:05 -04:00
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2009-04-18 02:32:31 -04:00
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2009-04-18 02:42:05 -04:00
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2009-04-18 02:32:31 -04:00
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2009-04-18 02:42:05 -04:00
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2005-04-16 15:20:36 -07:00
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2009-04-18 02:42:05 -04:00
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2005-04-16 15:20:36 -07:00
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2009-09-26 20:32:24 -04:00
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2009-10-25 21:33:15 -04:00
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NFS: don't try to cross a mountpount when there isn't one there.
consider the sequence of commands:
mkdir -p /import/nfs /import/bind /import/etc
mount --bind / /import/bind
mount --make-private /import/bind
mount --bind /import/etc /import/bind/etc
exportfs -o rw,no_root_squash,crossmnt,async,no_subtree_check localhost:/
mount -o vers=4 localhost:/ /import/nfs
ls -l /import/nfs/etc
You would not expect this to report a stale file handle.
Yet it does.
The manipulations under /import/bind cause the dentry for
/etc to get the DCACHE_MOUNTED flag set, even though nothing
is mounted on /etc. This causes nfsd to call
nfsd_cross_mnt() even though there is no mountpoint. So an
upcall to mountd for "/etc" is performed.
The 'crossmnt' flag on the export of / causes mountd to
report that /etc is exported as it is a descendant of /. It
assumes the kernel wouldn't ask about something that wasn't
a mountpoint. The filehandle returned identifies the
filesystem and the inode number of /etc.
When this filehandle is presented to rpc.mountd, via
"nfsd.fh", the inode cannot be found associated with any
name in /etc/exports, or with any mountpoint listed by
getmntent(). So rpc.mountd says the filehandle doesn't
exist. Hence ESTALE.
This is fixed by teaching nfsd not to trust DCACHE_MOUNTED
too much. It is just a hint, not a guarantee.
Change nfsd_mountpoint() to return '1' for a certain mountpoint,
'2' for a possible mountpoint, and 0 otherwise.
Then change nfsd_crossmnt() to check if follow_down()
actually found a mountpount and, if not, to avoid performing
a lookup if the location is not known to certainly require
an export-point.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2017-03-15 12:40:44 +11:00
|
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|
2009-10-25 21:33:15 -04:00
|
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|
2009-10-25 21:43:01 -04:00
|
|
|
|
2009-10-25 21:33:15 -04:00
|
|
|
|
NFS: don't try to cross a mountpount when there isn't one there.
consider the sequence of commands:
mkdir -p /import/nfs /import/bind /import/etc
mount --bind / /import/bind
mount --make-private /import/bind
mount --bind /import/etc /import/bind/etc
exportfs -o rw,no_root_squash,crossmnt,async,no_subtree_check localhost:/
mount -o vers=4 localhost:/ /import/nfs
ls -l /import/nfs/etc
You would not expect this to report a stale file handle.
Yet it does.
The manipulations under /import/bind cause the dentry for
/etc to get the DCACHE_MOUNTED flag set, even though nothing
is mounted on /etc. This causes nfsd to call
nfsd_cross_mnt() even though there is no mountpoint. So an
upcall to mountd for "/etc" is performed.
The 'crossmnt' flag on the export of / causes mountd to
report that /etc is exported as it is a descendant of /. It
assumes the kernel wouldn't ask about something that wasn't
a mountpoint. The filehandle returned identifies the
filesystem and the inode number of /etc.
When this filehandle is presented to rpc.mountd, via
"nfsd.fh", the inode cannot be found associated with any
name in /etc/exports, or with any mountpoint listed by
getmntent(). So rpc.mountd says the filehandle doesn't
exist. Hence ESTALE.
This is fixed by teaching nfsd not to trust DCACHE_MOUNTED
too much. It is just a hint, not a guarantee.
Change nfsd_mountpoint() to return '1' for a certain mountpoint,
'2' for a possible mountpoint, and 0 otherwise.
Then change nfsd_crossmnt() to check if follow_down()
actually found a mountpount and, if not, to avoid performing
a lookup if the location is not known to certainly require
an export-point.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2017-03-15 12:40:44 +11:00
|
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|
|
2009-10-25 21:33:15 -04:00
|
|
|
|
2011-09-12 19:37:26 -04:00
|
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|
|
|
|
|
|
2022-12-07 09:43:07 +01:00
|
|
|
|
NFS: don't try to cross a mountpount when there isn't one there.
consider the sequence of commands:
mkdir -p /import/nfs /import/bind /import/etc
mount --bind / /import/bind
mount --make-private /import/bind
mount --bind /import/etc /import/bind/etc
exportfs -o rw,no_root_squash,crossmnt,async,no_subtree_check localhost:/
mount -o vers=4 localhost:/ /import/nfs
ls -l /import/nfs/etc
You would not expect this to report a stale file handle.
Yet it does.
The manipulations under /import/bind cause the dentry for
/etc to get the DCACHE_MOUNTED flag set, even though nothing
is mounted on /etc. This causes nfsd to call
nfsd_cross_mnt() even though there is no mountpoint. So an
upcall to mountd for "/etc" is performed.
The 'crossmnt' flag on the export of / causes mountd to
report that /etc is exported as it is a descendant of /. It
assumes the kernel wouldn't ask about something that wasn't
a mountpoint. The filehandle returned identifies the
filesystem and the inode number of /etc.
When this filehandle is presented to rpc.mountd, via
"nfsd.fh", the inode cannot be found associated with any
name in /etc/exports, or with any mountpoint listed by
getmntent(). So rpc.mountd says the filehandle doesn't
exist. Hence ESTALE.
This is fixed by teaching nfsd not to trust DCACHE_MOUNTED
too much. It is just a hint, not a guarantee.
Change nfsd_mountpoint() to return '1' for a certain mountpoint,
'2' for a possible mountpoint, and 0 otherwise.
Then change nfsd_crossmnt() to check if follow_down()
actually found a mountpount and, if not, to avoid performing
a lookup if the location is not known to certainly require
an export-point.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2017-03-15 12:40:44 +11:00
|
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|
2009-10-25 21:33:15 -04:00
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|
2006-10-19 23:28:58 -07:00
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2007-07-17 04:04:47 -07:00
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2007-11-01 16:57:09 -04:00
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2007-07-17 04:04:47 -07:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
|
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|
2025-05-03 15:59:22 -04:00
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|
2005-04-16 15:20:36 -07:00
|
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|
2014-06-10 22:06:44 +08:00
|
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2005-04-16 15:20:36 -07:00
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2008-02-14 19:38:39 -08:00
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2005-04-16 15:20:36 -07:00
|
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2009-09-26 16:53:01 -04:00
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2005-04-16 15:20:36 -07:00
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2009-09-26 20:32:24 -04:00
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2005-04-16 15:20:36 -07:00
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2025-03-19 14:01:33 +11:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2009-10-25 21:33:15 -04:00
|
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|
2022-07-26 16:45:30 +10:00
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2005-04-16 15:20:36 -07:00
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2007-07-17 04:04:47 -07:00
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2022-07-26 16:45:30 +10:00
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2007-07-17 04:04:47 -07:00
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2022-07-26 16:45:30 +10:00
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2007-07-17 04:04:47 -07:00
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2022-07-26 16:45:30 +10:00
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2007-07-17 04:04:47 -07:00
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2011-04-09 11:28:53 -04:00
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2007-07-17 04:04:47 -07:00
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|
nfsd: Fix NFSD_MAY_BYPASS_GSS and NFSD_MAY_BYPASS_GSS_ON_ROOT
Currently NFSD_MAY_BYPASS_GSS and NFSD_MAY_BYPASS_GSS_ON_ROOT do not bypass
only GSS, but bypass any method. This is a problem specially for NFS3
AUTH_NULL-only exports.
The purpose of NFSD_MAY_BYPASS_GSS_ON_ROOT is described in RFC 2623,
section 2.3.2, to allow mounting NFS2/3 GSS-only export without
authentication. So few procedures which do not expose security risk used
during mount time can be called also with AUTH_NONE or AUTH_SYS, to allow
client mount operation to finish successfully.
The problem with current implementation is that for AUTH_NULL-only exports,
the NFSD_MAY_BYPASS_GSS_ON_ROOT is active also for NFS3 AUTH_UNIX mount
attempts which confuse NFS3 clients, and make them think that AUTH_UNIX is
enabled and is working. Linux NFS3 client never switches from AUTH_UNIX to
AUTH_NONE on active mount, which makes the mount inaccessible.
Fix the NFSD_MAY_BYPASS_GSS and NFSD_MAY_BYPASS_GSS_ON_ROOT implementation
and really allow to bypass only exports which have enabled some real
authentication (GSS, TLS, or any other).
The result would be: For AUTH_NULL-only export if client attempts to do
mount with AUTH_UNIX flavor then it will receive access errors, which
instruct client that AUTH_UNIX flavor is not usable and will either try
other auth flavor (AUTH_NULL if enabled) or fails mount procedure.
Similarly if client attempt to do mount with AUTH_NULL flavor and only
AUTH_UNIX flavor is enabled then the client will receive access error.
This should fix problems with AUTH_NULL-only or AUTH_UNIX-only exports if
client attempts to mount it with other auth flavor (e.g. with AUTH_NULL for
AUTH_UNIX-only export, or with AUTH_UNIX for AUTH_NULL-only export).
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2024-10-05 18:40:39 +02:00
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2007-07-17 04:04:48 -07:00
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2005-04-16 15:20:36 -07:00
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2015-03-17 22:25:59 +00:00
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2005-04-16 15:20:36 -07:00
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2007-07-17 04:04:48 -07:00
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2005-04-16 15:20:36 -07:00
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2023-09-11 14:43:57 -04:00
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2010-02-17 14:05:11 -06:00
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2019-12-18 14:57:23 -05:00
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2010-02-17 14:05:11 -06:00
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2010-10-06 10:48:20 +02:00
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2010-02-17 14:05:11 -06:00
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2007-07-17 04:04:47 -07:00
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2019-12-18 14:57:23 -05:00
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2005-04-16 15:20:36 -07:00
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2013-11-18 05:07:30 -08:00
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2022-09-08 12:08:40 +10:00
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2013-11-18 05:07:30 -08:00
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2013-12-11 14:16:36 +04:00
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2013-11-18 05:07:30 -08:00
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2023-05-02 15:36:02 +02:00
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2013-11-18 05:07:30 -08:00
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2017-02-09 14:20:42 -05:00
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2024-07-26 12:21:31 +10:00
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2017-02-09 14:20:42 -05:00
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2021-08-19 14:56:38 -04:00
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2017-02-09 14:20:42 -05:00
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2022-09-08 18:14:07 -04:00
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2023-01-13 12:49:10 +01:00
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2022-09-08 18:14:07 -04:00
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2025-07-30 09:24:31 -04:00
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2022-09-08 18:14:07 -04:00
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2025-07-16 09:34:29 -04:00
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2023-01-13 12:49:10 +01:00
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2022-09-08 18:14:07 -04:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2022-07-26 16:45:30 +10:00
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2024-02-15 20:24:51 -05:00
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2005-04-16 15:20:36 -07:00
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2022-07-26 16:45:30 +10:00
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2008-06-16 13:20:29 +02:00
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2011-07-26 03:30:54 -04:00
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|
2006-10-19 23:28:58 -07:00
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|
2024-02-15 20:24:50 -05:00
|
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2014-02-24 14:59:47 -05:00
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2017-02-20 17:04:42 -05:00
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2022-09-08 18:14:13 -04:00
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2005-04-16 15:20:36 -07:00
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2025-05-03 15:59:21 -04:00
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2018-11-30 16:04:25 +08:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2018-11-30 16:04:25 +08:00
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2019-05-27 14:21:32 +02:00
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2018-11-30 16:04:25 +08:00
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2005-04-16 15:20:36 -07:00
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2014-02-24 14:59:47 -05:00
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2005-04-16 15:20:36 -07:00
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2005-11-07 01:00:23 -08:00
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2017-02-20 17:04:42 -05:00
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2014-02-24 14:59:47 -05:00
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2017-02-20 17:04:42 -05:00
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2014-02-24 14:59:47 -05:00
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2005-04-16 15:20:36 -07:00
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2015-03-17 22:25:59 +00:00
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2005-04-16 15:20:36 -07:00
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2013-11-18 05:07:30 -08:00
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2007-03-07 15:26:25 +00:00
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2013-11-18 05:07:30 -08:00
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2017-02-20 07:21:33 +01:00
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2007-03-07 15:26:25 +00:00
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2017-02-20 17:04:42 -05:00
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2017-02-09 14:20:42 -05:00
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2017-02-20 17:04:42 -05:00
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2017-02-20 07:21:33 +01:00
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|
2014-09-07 12:15:52 -07:00
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2022-07-26 16:45:30 +10:00
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2024-02-15 20:24:50 -05:00
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2024-02-15 20:24:51 -05:00
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2022-09-08 18:14:13 -04:00
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2023-05-17 12:26:44 -04:00
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2022-09-08 18:14:13 -04:00
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2022-07-26 16:45:30 +10:00
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2026-01-09 11:21:38 -05:00
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2022-09-23 10:29:39 +02:00
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2022-07-26 16:45:30 +10:00
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2026-01-09 11:21:38 -05:00
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2024-02-15 20:24:51 -05:00
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2024-02-18 11:48:10 -05:00
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2024-02-15 20:24:50 -05:00
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2022-07-26 16:45:30 +10:00
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2017-02-09 14:20:42 -05:00
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2017-02-20 17:04:42 -05:00
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2024-02-15 20:24:50 -05:00
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2005-04-16 15:20:36 -07:00
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2006-01-09 20:51:55 -08:00
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2012-01-04 16:26:43 -05:00
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2011-09-12 19:37:26 -04:00
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2015-03-17 22:25:59 +00:00
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2011-09-12 19:37:26 -04:00
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2023-01-13 12:49:22 +01:00
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2021-01-21 14:19:28 +01:00
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2011-09-12 19:37:26 -04:00
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2013-05-02 13:19:10 -04:00
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2021-12-18 20:38:00 -05:00
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2015-12-03 12:59:52 +01:00
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2020-01-06 13:40:32 -05:00
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2021-12-18 20:38:01 -05:00
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2018-10-30 10:41:49 +11:00
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2020-01-06 13:40:33 -05:00
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2018-10-30 10:41:49 +11:00
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2021-12-18 20:38:01 -05:00
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2018-10-30 10:41:56 +11:00
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2020-01-06 13:40:33 -05:00
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2019-11-27 17:05:51 -05:00
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2019-12-18 14:57:23 -05:00
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2021-12-18 20:38:01 -05:00
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2019-12-18 14:57:23 -05:00
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2020-01-06 13:40:33 -05:00
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2021-12-28 14:27:56 -05:00
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2021-12-18 20:38:00 -05:00
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2023-09-11 14:43:57 -04:00
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2020-01-06 13:40:33 -05:00
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2019-11-27 17:05:51 -05:00
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2020-01-06 13:40:33 -05:00
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|
2015-12-03 12:59:52 +01:00
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2016-09-07 15:57:30 -04:00
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2022-06-30 22:58:49 +03:00
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2016-09-07 15:57:30 -04:00
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2022-06-30 22:58:49 +03:00
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2022-11-17 22:52:49 +02:00
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2022-06-30 22:58:49 +03:00
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2016-09-07 15:57:30 -04:00
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2014-11-07 14:44:26 -05:00
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2010-07-06 12:39:12 -04:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2020-06-23 22:39:24 +00:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2020-06-23 22:39:24 +00:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
Convert the following where appropriate:
(1) S_ISLNK(dentry->d_inode) to d_is_symlink(dentry).
(2) S_ISREG(dentry->d_inode) to d_is_reg(dentry).
(3) S_ISDIR(dentry->d_inode) to d_is_dir(dentry). This is actually more
complicated than it appears as some calls should be converted to
d_can_lookup() instead. The difference is whether the directory in
question is a real dir with a ->lookup op or whether it's a fake dir with
a ->d_automount op.
In some circumstances, we can subsume checks for dentry->d_inode not being
NULL into this, provided we the code isn't in a filesystem that expects
d_inode to be NULL if the dirent really *is* negative (ie. if we're going to
use d_inode() rather than d_backing_inode() to get the inode pointer).
Note that the dentry type field may be set to something other than
DCACHE_MISS_TYPE when d_inode is NULL in the case of unionmount, where the VFS
manages the fall-through from a negative dentry to a lower layer. In such a
case, the dentry type of the negative union dentry is set to the same as the
type of the lower dentry.
However, if you know d_inode is not NULL at the call site, then you can use
the d_is_xxx() functions even in a filesystem.
There is one further complication: a 0,0 chardev dentry may be labelled
DCACHE_WHITEOUT_TYPE rather than DCACHE_SPECIAL_TYPE. Strictly, this was
intended for special directory entry types that don't have attached inodes.
The following perl+coccinelle script was used:
use strict;
my @callers;
open($fd, 'git grep -l \'S_IS[A-Z].*->d_inode\' |') ||
die "Can't grep for S_ISDIR and co. callers";
@callers = <$fd>;
close($fd);
unless (@callers) {
print "No matches\n";
exit(0);
}
my @cocci = (
'@@',
'expression E;',
'@@',
'',
'- S_ISLNK(E->d_inode->i_mode)',
'+ d_is_symlink(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISDIR(E->d_inode->i_mode)',
'+ d_is_dir(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISREG(E->d_inode->i_mode)',
'+ d_is_reg(E)' );
my $coccifile = "tmp.sp.cocci";
open($fd, ">$coccifile") || die $coccifile;
print($fd "$_\n") || die $coccifile foreach (@cocci);
close($fd);
foreach my $file (@callers) {
chomp $file;
print "Processing ", $file, "\n";
system("spatch", "--sp-file", $coccifile, $file, "--in-place", "--no-show-diff") == 0 ||
die "spatch failed";
}
[AV: overlayfs parts skipped]
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-01-29 12:02:35 +00:00
|
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2005-04-16 15:20:36 -07:00
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VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
Convert the following where appropriate:
(1) S_ISLNK(dentry->d_inode) to d_is_symlink(dentry).
(2) S_ISREG(dentry->d_inode) to d_is_reg(dentry).
(3) S_ISDIR(dentry->d_inode) to d_is_dir(dentry). This is actually more
complicated than it appears as some calls should be converted to
d_can_lookup() instead. The difference is whether the directory in
question is a real dir with a ->lookup op or whether it's a fake dir with
a ->d_automount op.
In some circumstances, we can subsume checks for dentry->d_inode not being
NULL into this, provided we the code isn't in a filesystem that expects
d_inode to be NULL if the dirent really *is* negative (ie. if we're going to
use d_inode() rather than d_backing_inode() to get the inode pointer).
Note that the dentry type field may be set to something other than
DCACHE_MISS_TYPE when d_inode is NULL in the case of unionmount, where the VFS
manages the fall-through from a negative dentry to a lower layer. In such a
case, the dentry type of the negative union dentry is set to the same as the
type of the lower dentry.
However, if you know d_inode is not NULL at the call site, then you can use
the d_is_xxx() functions even in a filesystem.
There is one further complication: a 0,0 chardev dentry may be labelled
DCACHE_WHITEOUT_TYPE rather than DCACHE_SPECIAL_TYPE. Strictly, this was
intended for special directory entry types that don't have attached inodes.
The following perl+coccinelle script was used:
use strict;
my @callers;
open($fd, 'git grep -l \'S_IS[A-Z].*->d_inode\' |') ||
die "Can't grep for S_ISDIR and co. callers";
@callers = <$fd>;
close($fd);
unless (@callers) {
print "No matches\n";
exit(0);
}
my @cocci = (
'@@',
'expression E;',
'@@',
'',
'- S_ISLNK(E->d_inode->i_mode)',
'+ d_is_symlink(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISDIR(E->d_inode->i_mode)',
'+ d_is_dir(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISREG(E->d_inode->i_mode)',
'+ d_is_reg(E)' );
my $coccifile = "tmp.sp.cocci";
open($fd, ">$coccifile") || die $coccifile;
print($fd "$_\n") || die $coccifile foreach (@cocci);
close($fd);
foreach my $file (@callers) {
chomp $file;
print "Processing ", $file, "\n";
system("spatch", "--sp-file", $coccifile, $file, "--in-place", "--no-show-diff") == 0 ||
die "spatch failed";
}
[AV: overlayfs parts skipped]
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-01-29 12:02:35 +00:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2024-07-26 12:21:31 +10:00
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2005-04-16 15:20:36 -07:00
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2019-08-18 14:18:48 -04:00
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2011-06-07 11:50:23 -04:00
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2005-04-16 15:20:36 -07:00
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2011-06-07 11:50:23 -04:00
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2005-04-16 15:20:36 -07:00
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2012-03-18 22:44:49 -04:00
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2005-04-16 15:20:36 -07:00
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2023-09-11 14:30:27 -04:00
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2024-09-29 12:29:43 -04:00
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2005-04-16 15:20:36 -07:00
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2012-06-26 21:58:53 +04:00
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2005-04-16 15:20:36 -07:00
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2014-09-03 08:14:06 +08:00
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2006-10-19 23:28:58 -07:00
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2023-09-11 14:30:27 -04:00
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2005-04-16 15:20:36 -07:00
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2012-06-26 21:58:53 +04:00
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2015-03-17 22:25:59 +00:00
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2005-04-16 15:20:36 -07:00
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2012-03-18 22:44:49 -04:00
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2005-04-16 15:20:36 -07:00
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2012-03-18 22:44:49 -04:00
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2006-10-19 23:28:58 -07:00
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2023-09-11 14:30:27 -04:00
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2005-04-16 15:20:36 -07:00
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2012-03-18 22:44:49 -04:00
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2006-06-30 01:56:17 -07:00
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2005-04-16 15:20:36 -07:00
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2012-03-18 22:44:49 -04:00
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2014-09-03 08:14:06 +08:00
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2023-09-11 14:30:27 -04:00
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2012-03-18 22:44:50 -04:00
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2024-02-15 11:31:00 +01:00
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2014-09-03 08:14:06 +08:00
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2015-04-28 15:41:16 +02:00
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2023-09-11 14:30:27 -04:00
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2014-09-03 08:14:06 +08:00
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2005-04-16 15:20:36 -07:00
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2023-09-11 14:30:27 -04:00
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2019-08-18 14:18:48 -04:00
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2023-09-11 14:30:27 -04:00
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2021-12-18 20:37:56 -05:00
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2019-08-18 14:18:48 -04:00
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2025-03-19 14:01:33 +11:00
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2019-08-18 14:18:48 -04:00
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2021-12-18 20:37:56 -05:00
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2019-08-18 14:18:48 -04:00
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2021-12-18 20:37:56 -05:00
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2024-09-29 12:29:43 -04:00
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2023-09-11 14:30:27 -04:00
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2021-12-18 20:37:56 -05:00
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2023-09-11 14:30:27 -04:00
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2021-12-18 20:37:56 -05:00
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2005-04-16 15:20:36 -07:00
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2022-03-27 16:46:47 -04:00
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2025-11-11 09:12:55 -05:00
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2022-03-27 16:46:47 -04:00
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2023-09-11 14:30:27 -04:00
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2022-03-27 16:46:47 -04:00
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2023-09-11 14:30:27 -04:00
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2025-11-11 09:12:55 -05:00
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2019-08-18 14:18:48 -04:00
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2025-11-11 09:12:55 -05:00
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2019-08-18 14:18:48 -04:00
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2005-04-16 15:20:36 -07:00
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2007-06-12 21:22:14 +02:00
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2023-06-23 23:55:12 +01:00
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2007-06-12 21:22:14 +02:00
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2023-03-17 17:09:20 -04:00
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2005-04-16 15:20:36 -07:00
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2007-06-12 21:22:14 +02:00
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2005-04-16 15:20:36 -07:00
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2007-06-12 21:22:14 +02:00
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2022-09-10 22:14:02 +01:00
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2022-11-23 14:14:32 -05:00
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2005-04-16 15:20:36 -07:00
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2022-11-23 14:14:32 -05:00
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2023-03-17 13:13:08 -04:00
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2023-07-27 17:21:17 +01:00
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2023-03-17 13:13:08 -04:00
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2023-07-27 17:21:17 +01:00
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2023-03-17 13:13:08 -04:00
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2023-03-17 17:09:20 -04:00
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2023-03-17 13:13:08 -04:00
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2022-09-10 22:14:02 +01:00
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2021-06-28 16:34:20 -04:00
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2005-04-16 15:20:36 -07:00
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2007-06-12 21:22:14 +02:00
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2019-08-26 13:03:11 -04:00
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2018-03-28 13:29:11 -04:00
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2019-08-26 13:03:11 -04:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2024-01-26 10:39:47 -05:00
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2019-08-26 13:03:11 -04:00
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2006-10-19 23:28:58 -07:00
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2009-12-17 21:24:21 -05:00
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2018-03-28 13:29:11 -04:00
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2014-03-18 17:01:51 -04:00
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2018-03-28 13:29:11 -04:00
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2014-03-18 17:01:51 -04:00
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2018-03-28 13:29:11 -04:00
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2014-03-18 17:01:51 -04:00
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2023-05-18 13:46:03 -04:00
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2018-03-28 13:29:11 -04:00
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2019-08-26 13:03:11 -04:00
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2014-03-18 17:01:51 -04:00
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2019-08-26 13:03:11 -04:00
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2014-03-18 17:01:51 -04:00
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2018-03-28 13:29:11 -04:00
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2023-11-22 14:27:02 +02:00
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2019-08-26 13:03:11 -04:00
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2014-03-18 17:01:51 -04:00
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2025-10-08 09:52:30 -04:00
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2026-03-04 10:32:42 -05:00
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2025-10-08 09:52:30 -04:00
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2023-05-18 13:45:56 -04:00
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2025-10-08 09:52:28 -04:00
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2023-05-18 13:45:56 -04:00
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2025-10-08 09:52:28 -04:00
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2023-05-18 13:45:56 -04:00
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2025-10-08 09:52:28 -04:00
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2023-05-18 13:45:56 -04:00
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2025-06-13 16:08:46 -04:00
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2023-05-18 13:45:56 -04:00
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2025-05-06 14:33:11 -04:00
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2023-05-18 13:45:56 -04:00
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2025-06-13 16:08:46 -04:00
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2025-09-06 17:25:11 -04:00
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2025-10-08 09:52:30 -04:00
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2025-09-06 17:25:11 -04:00
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2025-06-13 16:08:46 -04:00
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2023-05-18 13:45:56 -04:00
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2025-09-17 10:31:40 -04:00
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2025-05-06 14:33:11 -04:00
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2025-09-17 10:31:40 -04:00
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2025-05-06 14:33:11 -04:00
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2025-09-17 10:31:40 -04:00
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2025-05-06 14:33:11 -04:00
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2025-09-17 10:31:40 -04:00
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2023-05-18 13:45:56 -04:00
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2025-09-17 10:31:40 -04:00
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2025-06-13 16:08:46 -04:00
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2023-05-18 13:45:56 -04:00
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2009-06-15 16:03:53 -07:00
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2013-01-23 17:07:38 -05:00
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2009-06-15 16:03:53 -07:00
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Coccinelle-based conversion to use ->i_state accessors
All places were patched by coccinelle with the default expecting that
->i_lock is held, afterwards entries got fixed up by hand to use
unlocked variants as needed.
The script:
@@
expression inode, flags;
@@
- inode->i_state & flags
+ inode_state_read(inode) & flags
@@
expression inode, flags;
@@
- inode->i_state &= ~flags
+ inode_state_clear(inode, flags)
@@
expression inode, flag1, flag2;
@@
- inode->i_state &= ~flag1 & ~flag2
+ inode_state_clear(inode, flag1 | flag2)
@@
expression inode, flags;
@@
- inode->i_state |= flags
+ inode_state_set(inode, flags)
@@
expression inode, flags;
@@
- inode->i_state = flags
+ inode_state_assign(inode, flags)
@@
expression inode, flags;
@@
- flags = inode->i_state
+ flags = inode_state_read(inode)
@@
expression inode, flags;
@@
- READ_ONCE(inode->i_state) & flags
+ inode_state_read(inode) & flags
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-10-09 09:59:18 +02:00
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2009-06-15 16:03:53 -07:00
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2010-03-22 17:32:25 +01:00
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2009-06-15 16:03:53 -07:00
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2025-11-11 09:59:31 -05:00
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2025-05-09 13:39:23 -04:00
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2015-06-18 16:45:00 +02:00
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|
2025-05-09 13:39:23 -04:00
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2005-04-16 15:20:36 -07:00
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|
2021-12-28 12:41:32 -05:00
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|
2020-01-06 13:40:29 -05:00
|
|
|
|
2020-11-30 17:03:19 -05:00
|
|
|
|
2025-06-13 16:08:47 -04:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
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|
|
2017-05-27 11:16:53 +03:00
|
|
|
|
2021-12-18 20:38:01 -05:00
|
|
|
|
2018-03-27 10:53:27 -04:00
|
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|
|
2006-10-19 23:28:58 -07:00
|
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|
|
2020-11-30 17:03:19 -05:00
|
|
|
|
2014-05-12 11:22:47 +10:00
|
|
|
|
2020-11-30 17:03:19 -05:00
|
|
|
|
2026-05-19 09:34:22 -04:00
|
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|
2014-05-12 11:22:47 +10:00
|
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|
2018-03-27 10:53:27 -04:00
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2020-11-30 17:03:19 -05:00
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2014-05-12 11:22:47 +10:00
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|
mm/writeback: replace PF_LESS_THROTTLE with PF_LOCAL_THROTTLE
PF_LESS_THROTTLE exists for loop-back nfsd (and a similar need in the
loop block driver and callers of prctl(PR_SET_IO_FLUSHER)), where a
daemon needs to write to one bdi (the final bdi) in order to free up
writes queued to another bdi (the client bdi).
The daemon sets PF_LESS_THROTTLE and gets a larger allowance of dirty
pages, so that it can still dirty pages after other processses have been
throttled. The purpose of this is to avoid deadlock that happen when
the PF_LESS_THROTTLE process must write for any dirty pages to be freed,
but it is being thottled and cannot write.
This approach was designed when all threads were blocked equally,
independently on which device they were writing to, or how fast it was.
Since that time the writeback algorithm has changed substantially with
different threads getting different allowances based on non-trivial
heuristics. This means the simple "add 25%" heuristic is no longer
reliable.
The important issue is not that the daemon needs a *larger* dirty page
allowance, but that it needs a *private* dirty page allowance, so that
dirty pages for the "client" bdi that it is helping to clear (the bdi
for an NFS filesystem or loop block device etc) do not affect the
throttling of the daemon writing to the "final" bdi.
This patch changes the heuristic so that the task is not throttled when
the bdi it is writing to has a dirty page count below below (or equal
to) the free-run threshold for that bdi. This ensures it will always be
able to have some pages in flight, and so will not deadlock.
In a steady-state, it is expected that PF_LOCAL_THROTTLE tasks might
still be throttled by global threshold, but that is acceptable as it is
only the deadlock state that is interesting for this flag.
This approach of "only throttle when target bdi is busy" is consistent
with the other use of PF_LESS_THROTTLE in current_may_throttle(), were
it causes attention to be focussed only on the target bdi.
So this patch
- renames PF_LESS_THROTTLE to PF_LOCAL_THROTTLE,
- removes the 25% bonus that that flag gives, and
- If PF_LOCAL_THROTTLE is set, don't delay at all unless the
global and the local free-run thresholds are exceeded.
Note that previously realtime threads were treated the same as
PF_LESS_THROTTLE threads. This patch does *not* change the behvaiour
for real-time threads, so it is now different from the behaviour of nfsd
and loop tasks. I don't know what is wanted for realtime.
[akpm@linux-foundation.org: coding style fixes]
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Chuck Lever <chuck.lever@oracle.com> [nfsd]
Cc: Christoph Hellwig <hch@lst.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Link: http://lkml.kernel.org/r/87ftbf7gs3.fsf@notabene.neil.brown.name
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-01 21:48:18 -07:00
|
|
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|
2014-05-12 11:22:47 +10:00
|
|
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|
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|
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|
|
mm/writeback: replace PF_LESS_THROTTLE with PF_LOCAL_THROTTLE
PF_LESS_THROTTLE exists for loop-back nfsd (and a similar need in the
loop block driver and callers of prctl(PR_SET_IO_FLUSHER)), where a
daemon needs to write to one bdi (the final bdi) in order to free up
writes queued to another bdi (the client bdi).
The daemon sets PF_LESS_THROTTLE and gets a larger allowance of dirty
pages, so that it can still dirty pages after other processses have been
throttled. The purpose of this is to avoid deadlock that happen when
the PF_LESS_THROTTLE process must write for any dirty pages to be freed,
but it is being thottled and cannot write.
This approach was designed when all threads were blocked equally,
independently on which device they were writing to, or how fast it was.
Since that time the writeback algorithm has changed substantially with
different threads getting different allowances based on non-trivial
heuristics. This means the simple "add 25%" heuristic is no longer
reliable.
The important issue is not that the daemon needs a *larger* dirty page
allowance, but that it needs a *private* dirty page allowance, so that
dirty pages for the "client" bdi that it is helping to clear (the bdi
for an NFS filesystem or loop block device etc) do not affect the
throttling of the daemon writing to the "final" bdi.
This patch changes the heuristic so that the task is not throttled when
the bdi it is writing to has a dirty page count below below (or equal
to) the free-run threshold for that bdi. This ensures it will always be
able to have some pages in flight, and so will not deadlock.
In a steady-state, it is expected that PF_LOCAL_THROTTLE tasks might
still be throttled by global threshold, but that is acceptable as it is
only the deadlock state that is interesting for this flag.
This approach of "only throttle when target bdi is busy" is consistent
with the other use of PF_LESS_THROTTLE in current_may_throttle(), were
it causes attention to be focussed only on the target bdi.
So this patch
- renames PF_LESS_THROTTLE to PF_LOCAL_THROTTLE,
- removes the 25% bonus that that flag gives, and
- If PF_LOCAL_THROTTLE is set, don't delay at all unless the
global and the local free-run thresholds are exceeded.
Note that previously realtime threads were treated the same as
PF_LESS_THROTTLE threads. This patch does *not* change the behvaiour
for real-time threads, so it is now different from the behaviour of nfsd
and loop tasks. I don't know what is wanted for realtime.
[akpm@linux-foundation.org: coding style fixes]
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Chuck Lever <chuck.lever@oracle.com> [nfsd]
Cc: Christoph Hellwig <hch@lst.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Link: http://lkml.kernel.org/r/87ftbf7gs3.fsf@notabene.neil.brown.name
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-01 21:48:18 -07:00
|
|
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|
2020-11-30 17:03:19 -05:00
|
|
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|
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|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2016-12-31 21:00:21 +08:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
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|
2016-12-31 20:59:53 +08:00
|
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|
2025-06-13 16:08:47 -04:00
|
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|
2025-11-11 09:59:30 -05:00
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|
2016-04-07 08:52:04 -07:00
|
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|
2025-05-06 16:42:25 -04:00
|
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2026-05-19 09:34:22 -04:00
|
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2025-11-11 09:59:31 -05:00
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2021-12-18 20:38:01 -05:00
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2021-12-28 14:19:41 -05:00
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2021-12-30 10:22:05 -05:00
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2025-09-06 17:25:11 -04:00
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2025-11-11 09:59:31 -05:00
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2025-09-06 17:25:11 -04:00
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2025-11-11 09:59:31 -05:00
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2025-09-06 17:25:11 -04:00
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2020-01-06 13:40:31 -05:00
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2023-09-11 14:43:57 -04:00
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2009-06-15 19:07:13 -07:00
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2020-01-06 13:40:31 -05:00
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2024-01-26 10:39:47 -05:00
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2009-12-17 21:24:21 -05:00
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2021-12-18 20:38:01 -05:00
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2026-05-22 12:44:19 -04:00
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2021-12-18 20:38:01 -05:00
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2026-05-22 12:44:19 -04:00
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2005-04-16 15:20:36 -07:00
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2024-07-26 12:21:34 +10:00
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2016-04-07 08:52:04 -07:00
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2023-09-11 14:43:57 -04:00
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2019-09-02 13:02:58 -04:00
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2005-04-16 15:20:36 -07:00
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2009-06-15 19:07:13 -07:00
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2018-03-27 10:53:27 -04:00
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2020-11-30 17:03:19 -05:00
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mm/writeback: replace PF_LESS_THROTTLE with PF_LOCAL_THROTTLE
PF_LESS_THROTTLE exists for loop-back nfsd (and a similar need in the
loop block driver and callers of prctl(PR_SET_IO_FLUSHER)), where a
daemon needs to write to one bdi (the final bdi) in order to free up
writes queued to another bdi (the client bdi).
The daemon sets PF_LESS_THROTTLE and gets a larger allowance of dirty
pages, so that it can still dirty pages after other processses have been
throttled. The purpose of this is to avoid deadlock that happen when
the PF_LESS_THROTTLE process must write for any dirty pages to be freed,
but it is being thottled and cannot write.
This approach was designed when all threads were blocked equally,
independently on which device they were writing to, or how fast it was.
Since that time the writeback algorithm has changed substantially with
different threads getting different allowances based on non-trivial
heuristics. This means the simple "add 25%" heuristic is no longer
reliable.
The important issue is not that the daemon needs a *larger* dirty page
allowance, but that it needs a *private* dirty page allowance, so that
dirty pages for the "client" bdi that it is helping to clear (the bdi
for an NFS filesystem or loop block device etc) do not affect the
throttling of the daemon writing to the "final" bdi.
This patch changes the heuristic so that the task is not throttled when
the bdi it is writing to has a dirty page count below below (or equal
to) the free-run threshold for that bdi. This ensures it will always be
able to have some pages in flight, and so will not deadlock.
In a steady-state, it is expected that PF_LOCAL_THROTTLE tasks might
still be throttled by global threshold, but that is acceptable as it is
only the deadlock state that is interesting for this flag.
This approach of "only throttle when target bdi is busy" is consistent
with the other use of PF_LESS_THROTTLE in current_may_throttle(), were
it causes attention to be focussed only on the target bdi.
So this patch
- renames PF_LESS_THROTTLE to PF_LOCAL_THROTTLE,
- removes the 25% bonus that that flag gives, and
- If PF_LOCAL_THROTTLE is set, don't delay at all unless the
global and the local free-run thresholds are exceeded.
Note that previously realtime threads were treated the same as
PF_LESS_THROTTLE threads. This patch does *not* change the behvaiour
for real-time threads, so it is now different from the behaviour of nfsd
and loop tasks. I don't know what is wanted for realtime.
[akpm@linux-foundation.org: coding style fixes]
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Chuck Lever <chuck.lever@oracle.com> [nfsd]
Cc: Christoph Hellwig <hch@lst.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Link: http://lkml.kernel.org/r/87ftbf7gs3.fsf@notabene.neil.brown.name
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-01 21:48:18 -07:00
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2018-03-27 10:53:27 -04:00
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2005-04-16 15:20:36 -07:00
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2023-11-17 17:14:33 -05:00
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2025-03-08 15:14:38 -05:00
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2023-11-17 17:14:33 -05:00
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2023-05-18 13:45:56 -04:00
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2014-03-18 17:01:51 -04:00
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2023-05-18 13:45:56 -04:00
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2014-03-18 17:01:51 -04:00
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2023-05-18 13:45:56 -04:00
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2014-03-18 17:01:51 -04:00
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2019-08-18 14:18:50 -04:00
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2014-03-18 17:01:51 -04:00
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2018-03-27 10:53:11 -04:00
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2022-10-28 10:46:51 -04:00
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2014-03-18 17:01:51 -04:00
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2019-08-18 14:18:50 -04:00
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2023-11-17 17:14:33 -05:00
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2019-08-26 13:03:11 -04:00
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2017-05-27 11:16:54 +03:00
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2025-10-08 09:52:28 -04:00
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2015-11-17 06:52:23 -05:00
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2019-08-18 14:18:50 -04:00
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2018-03-27 10:53:11 -04:00
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2010-07-27 16:48:54 -04:00
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2025-05-09 13:39:23 -04:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2016-12-31 21:00:13 +08:00
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2025-05-09 13:39:23 -04:00
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2020-01-06 13:40:37 -05:00
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2005-04-16 15:20:36 -07:00
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2019-08-18 14:18:49 -04:00
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2005-04-16 15:20:36 -07:00
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2018-03-27 10:53:11 -04:00
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2015-11-17 06:52:23 -05:00
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2022-10-28 10:46:51 -04:00
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2016-12-31 21:00:13 +08:00
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2005-04-16 15:20:36 -07:00
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2025-05-09 13:39:23 -04:00
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2019-08-18 14:18:49 -04:00
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2005-04-16 15:20:36 -07:00
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2018-03-27 10:53:11 -04:00
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2005-04-16 15:20:36 -07:00
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NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
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2022-10-28 10:46:38 -04:00
|
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|
NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
|
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|
|
2010-01-29 16:44:25 -05:00
|
|
|
|
NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
|
|
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|
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|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-10-19 23:28:58 -07:00
|
|
|
|
2022-10-28 10:46:38 -04:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2022-10-28 10:46:38 -04:00
|
|
|
|
NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
|
|
|
|
|
|
|
|
|
2021-12-28 14:26:03 -05:00
|
|
|
|
NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
|
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|
2025-04-09 10:32:23 -04:00
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|
|
NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
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2021-12-28 14:26:03 -05:00
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2005-04-16 15:20:36 -07:00
|
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2021-12-18 20:38:01 -05:00
|
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|
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|
|
|
|
2010-01-29 16:44:25 -05:00
|
|
|
|
NFSD: COMMIT operations must not return NFS?ERR_INVAL
Since, well, forever, the Linux NFS server's nfsd_commit() function
has returned nfserr_inval when the passed-in byte range arguments
were non-sensical.
However, according to RFC 1813 section 3.3.21, NFSv3 COMMIT requests
are permitted to return only the following non-zero status codes:
NFS3ERR_IO
NFS3ERR_STALE
NFS3ERR_BADHANDLE
NFS3ERR_SERVERFAULT
NFS3ERR_INVAL is not included in that list. Likewise, NFS4ERR_INVAL
is not listed in the COMMIT row of Table 6 in RFC 8881.
RFC 7530 does permit COMMIT to return NFS4ERR_INVAL, but does not
specify when it can or should be used.
Instead of dropping or failing a COMMIT request in a byte range that
is not supported, turn it into a valid request by treating one or
both arguments as zero. Offset zero means start-of-file, count zero
means until-end-of-file, so we only ever extend the commit range.
NFS servers are always allowed to commit more and sooner than
requested.
The range check is no longer bounded by NFS_OFFSET_MAX, but rather
by the value that is returned in the maxfilesize field of the NFSv3
FSINFO procedure or the NFSv4 maxfilesize file attribute.
Note that this change results in a new pynfs failure:
CMT4 st_commit.testCommitOverflow : RUNNING
CMT4 st_commit.testCommitOverflow : FAILURE
COMMIT with offset + count overflow should return
NFS4ERR_INVAL, instead got NFS4_OK
IMO the test is not correct as written: RFC 8881 does not allow the
COMMIT operation to return NFS4ERR_INVAL.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
2022-01-24 15:50:31 -05:00
|
|
|
|
2019-09-02 13:02:58 -04:00
|
|
|
|
|
|
|
|
|
2021-12-30 10:22:05 -05:00
|
|
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|
2021-12-18 20:38:01 -05:00
|
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|
|
|
|
|
|
2026-05-22 12:44:19 -04:00
|
|
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|
|
|
|
|
|
2022-06-25 23:52:43 +03:00
|
|
|
|
2019-09-02 13:02:58 -04:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2019-09-02 13:02:58 -04:00
|
|
|
|
|
|
|
|
|
2023-09-11 14:43:57 -04:00
|
|
|
|
2022-06-25 23:52:43 +03:00
|
|
|
|
2019-09-02 13:02:58 -04:00
|
|
|
|
2020-01-06 13:40:36 -05:00
|
|
|
|
2021-12-30 10:22:05 -05:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2025-04-09 10:32:23 -04:00
|
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|
|
2005-04-16 15:20:36 -07:00
|
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2022-03-28 16:10:17 -04:00
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2022-07-26 16:45:30 +10:00
|
|
|
|
2022-03-28 16:10:17 -04:00
|
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|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
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|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
2007-11-30 16:55:23 -05:00
|
|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
2022-03-28 16:10:17 -04:00
|
|
|
|
|
|
|
|
|
2007-11-30 16:55:23 -05:00
|
|
|
|
2022-03-28 16:10:17 -04:00
|
|
|
|
2007-11-30 16:55:23 -05:00
|
|
|
|
|
|
|
|
|
2022-03-28 16:10:17 -04:00
|
|
|
|
2007-11-30 16:55:23 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-02-02 06:53:11 -08:00
|
|
|
|
2007-11-30 16:55:23 -05:00
|
|
|
|
2022-03-28 16:10:17 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2024-05-03 09:09:06 -04:00
|
|
|
|
2024-02-15 20:24:51 -05:00
|
|
|
|
2022-03-28 16:10:17 -04:00
|
|
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|
|
|
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|
|
2007-11-30 16:55:23 -05:00
|
|
|
|
|
|
|
|
|
2009-02-10 11:27:51 +08:00
|
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|
2025-11-13 11:18:27 +11:00
|
|
|
|
2006-10-19 23:28:58 -07:00
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
|
|
2022-09-06 10:42:19 +10:00
|
|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2016-08-03 22:05:00 +03:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
2006-10-19 23:28:58 -07:00
|
|
|
|
VFS: Change vfs_mkdir() to return the dentry.
vfs_mkdir() does not guarantee to leave the child dentry hashed or make
it positive on success, and in many such cases the filesystem had to use
a different dentry which it can now return.
This patch changes vfs_mkdir() to return the dentry provided by the
filesystems which is hashed and positive when provided. This reduces
the number of cases where the resulting dentry is not positive to a
handful which don't deserve extra efforts.
The only callers of vfs_mkdir() which are interested in the resulting
inode are in-kernel filesystem clients: cachefiles, nfsd, smb/server.
The only filesystems that don't reliably provide the inode are:
- kernfs, tracefs which these clients are unlikely to be interested in
- cifs in some configurations would need to do a lookup to find the
created inode, but doesn't. cifs cannot be exported via NFS, is
unlikely to be used by cachefiles, and smb/server only has a soft
requirement for the inode, so this is unlikely to be a problem in
practice.
- hostfs, nfs, cifs may need to do a lookup (rarely for NFS) and it is
possible for a race to make that lookup fail. Actual failure
is unlikely and providing callers handle negative dentries graceful
they will fail-safe.
So this patch removes the lookup code in nfsd and smb/server and adjusts
them to fail safe if a negative dentry is provided:
- cache-files already fails safe by restarting the task from the
top - it still does with this change, though it no longer calls
cachefiles_put_directory() as that will crash if the dentry is
negative.
- nfsd reports "Server-fault" which it what it used to do if the lookup
failed. This will never happen on any file-systems that it can actually
export, so this is of no consequence. I removed the fh_update()
call as that is not needed and out-of-place. A subsequent
nfsd_create_setattr() call will call fh_update() when needed.
- smb/server only wants the inode to call ksmbd_smb_inherit_owner()
which updates ->i_uid (without calling notify_change() or similar)
which can be safely skipping on cifs (I hope).
If a different dentry is returned, the first one is put. If necessary
the fact that it is new can be determined by comparing pointers. A new
dentry will certainly have a new pointer (as the old is put after the
new is obtained).
Similarly if an error is returned (via ERR_PTR()) the original dentry is
put.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Link: https://lore.kernel.org/r/20250227013949.536172-7-neilb@suse.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-02-27 12:32:58 +11:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
2015-03-17 22:25:59 +00:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
|
|
2024-07-26 12:21:31 +10:00
|
|
|
|
|
|
|
|
|
2016-07-14 23:20:22 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-06-16 16:43:18 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-11-08 17:44:59 -08:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
2025-11-11 09:12:51 -05:00
|
|
|
|
2009-02-10 11:27:51 +08:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
2025-11-11 09:12:47 -05:00
|
|
|
|
VFS: Change vfs_mkdir() to return the dentry.
vfs_mkdir() does not guarantee to leave the child dentry hashed or make
it positive on success, and in many such cases the filesystem had to use
a different dentry which it can now return.
This patch changes vfs_mkdir() to return the dentry provided by the
filesystems which is hashed and positive when provided. This reduces
the number of cases where the resulting dentry is not positive to a
handful which don't deserve extra efforts.
The only callers of vfs_mkdir() which are interested in the resulting
inode are in-kernel filesystem clients: cachefiles, nfsd, smb/server.
The only filesystems that don't reliably provide the inode are:
- kernfs, tracefs which these clients are unlikely to be interested in
- cifs in some configurations would need to do a lookup to find the
created inode, but doesn't. cifs cannot be exported via NFS, is
unlikely to be used by cachefiles, and smb/server only has a soft
requirement for the inode, so this is unlikely to be a problem in
practice.
- hostfs, nfs, cifs may need to do a lookup (rarely for NFS) and it is
possible for a race to make that lookup fail. Actual failure
is unlikely and providing callers handle negative dentries graceful
they will fail-safe.
So this patch removes the lookup code in nfsd and smb/server and adjusts
them to fail safe if a negative dentry is provided:
- cache-files already fails safe by restarting the task from the
top - it still does with this change, though it no longer calls
cachefiles_put_directory() as that will crash if the dentry is
negative.
- nfsd reports "Server-fault" which it what it used to do if the lookup
failed. This will never happen on any file-systems that it can actually
export, so this is of no consequence. I removed the fh_update()
call as that is not needed and out-of-place. A subsequent
nfsd_create_setattr() call will call fh_update() when needed.
- smb/server only wants the inode to call ksmbd_smb_inherit_owner()
which updates ->i_uid (without calling notify_change() or similar)
which can be safely skipping on cifs (I hope).
If a different dentry is returned, the first one is put. If necessary
the fact that it is new can be determined by comparing pointers. A new
dentry will certainly have a new pointer (as the old is put after the
new is obtained).
Similarly if an error is returned (via ERR_PTR()) the original dentry is
put.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Link: https://lore.kernel.org/r/20250227013949.536172-7-neilb@suse.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-02-27 12:32:58 +11:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2018-05-11 17:03:19 -04:00
|
|
|
|
VFS: Change vfs_mkdir() to return the dentry.
vfs_mkdir() does not guarantee to leave the child dentry hashed or make
it positive on success, and in many such cases the filesystem had to use
a different dentry which it can now return.
This patch changes vfs_mkdir() to return the dentry provided by the
filesystems which is hashed and positive when provided. This reduces
the number of cases where the resulting dentry is not positive to a
handful which don't deserve extra efforts.
The only callers of vfs_mkdir() which are interested in the resulting
inode are in-kernel filesystem clients: cachefiles, nfsd, smb/server.
The only filesystems that don't reliably provide the inode are:
- kernfs, tracefs which these clients are unlikely to be interested in
- cifs in some configurations would need to do a lookup to find the
created inode, but doesn't. cifs cannot be exported via NFS, is
unlikely to be used by cachefiles, and smb/server only has a soft
requirement for the inode, so this is unlikely to be a problem in
practice.
- hostfs, nfs, cifs may need to do a lookup (rarely for NFS) and it is
possible for a race to make that lookup fail. Actual failure
is unlikely and providing callers handle negative dentries graceful
they will fail-safe.
So this patch removes the lookup code in nfsd and smb/server and adjusts
them to fail safe if a negative dentry is provided:
- cache-files already fails safe by restarting the task from the
top - it still does with this change, though it no longer calls
cachefiles_put_directory() as that will crash if the dentry is
negative.
- nfsd reports "Server-fault" which it what it used to do if the lookup
failed. This will never happen on any file-systems that it can actually
export, so this is of no consequence. I removed the fh_update()
call as that is not needed and out-of-place. A subsequent
nfsd_create_setattr() call will call fh_update() when needed.
- smb/server only wants the inode to call ksmbd_smb_inherit_owner()
which updates ->i_uid (without calling notify_change() or similar)
which can be safely skipping on cifs (I hope).
If a different dentry is returned, the first one is put. If necessary
the fact that it is new can be determined by comparing pointers. A new
dentry will certainly have a new pointer (as the old is put after the
new is obtained).
Similarly if an error is returned (via ERR_PTR()) the original dentry is
put.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Link: https://lore.kernel.org/r/20250227013949.536172-7-neilb@suse.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-02-27 12:32:58 +11:00
|
|
|
|
2018-05-11 17:03:19 -04:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:10 +01:00
|
|
|
|
2025-11-11 09:12:52 -05:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2016-07-22 12:03:46 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2008-02-15 14:37:57 -08:00
|
|
|
|
2012-06-12 16:20:33 +02:00
|
|
|
|
2008-02-15 14:37:57 -08:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
2025-11-13 11:18:27 +11:00
|
|
|
|
|
|
|
|
|
2025-11-13 11:18:37 +11:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-19 23:28:58 -07:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|
|
|
|
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|
|
|
|
|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
|
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
2025-05-03 15:59:23 -04:00
|
|
|
|
|
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-07-21 16:00:12 -04:00
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
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|
|
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|
|
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|
|
|
|
2025-11-13 11:18:27 +11:00
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
|
|
2025-11-13 11:18:27 +11:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-07-20 16:16:06 -04:00
|
|
|
|
2016-08-10 14:46:27 -04:00
|
|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
2023-07-21 10:29:10 -04:00
|
|
|
|
|
|
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|
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|
|
|
|
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2022-09-06 10:42:19 +10:00
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2025-11-27 11:48:56 +01:00
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2025-11-13 11:18:27 +11:00
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2022-07-26 16:45:30 +10:00
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2025-11-13 11:18:37 +11:00
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2022-07-26 16:45:30 +10:00
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2016-07-20 16:16:06 -04:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2017-05-27 16:11:23 -04:00
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2012-03-15 08:21:57 -04:00
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2017-05-27 16:11:23 -04:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2017-05-27 16:11:23 -04:00
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2005-04-16 15:20:36 -07:00
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2012-03-15 08:21:57 -04:00
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2005-04-16 15:20:36 -07:00
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2017-05-27 16:11:23 -04:00
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2005-04-16 15:20:36 -07:00
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2012-03-15 08:21:57 -04:00
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2005-04-16 15:20:36 -07:00
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2017-05-27 16:11:23 -04:00
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2005-04-16 15:20:36 -07:00
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2017-05-27 16:11:23 -04:00
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2005-04-16 15:20:36 -07:00
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2022-07-26 16:45:30 +10:00
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2005-04-16 15:20:36 -07:00
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2022-07-26 16:45:30 +10:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2022-07-26 16:45:30 +10:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2025-05-03 15:59:24 -04:00
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2005-04-16 15:20:36 -07:00
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2014-06-20 11:52:21 -04:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2012-06-12 16:20:33 +02:00
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2022-07-26 16:45:30 +10:00
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2012-06-12 16:20:33 +02:00
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2005-04-16 15:20:36 -07:00
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2025-11-13 11:18:27 +11:00
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2022-07-26 16:45:30 +10:00
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2023-07-21 10:29:10 -04:00
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2025-11-11 09:12:53 -05:00
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2006-10-19 23:28:58 -07:00
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2022-07-26 16:45:30 +10:00
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2022-07-26 16:45:30 +10:00
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2023-07-21 10:29:10 -04:00
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2025-11-13 11:18:37 +11:00
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2010-02-17 14:05:11 -06:00
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2025-11-13 11:18:27 +11:00
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2022-07-26 16:45:30 +10:00
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2005-04-16 15:20:36 -07:00
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2025-01-26 16:50:20 -05:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2010-07-19 16:38:24 -04:00
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2025-01-26 16:50:20 -05:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2025-05-03 15:59:25 -04:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2011-08-15 16:59:55 -04:00
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2005-04-16 15:20:36 -07:00
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2011-08-15 16:59:55 -04:00
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VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
Convert the following where appropriate:
(1) S_ISLNK(dentry->d_inode) to d_is_symlink(dentry).
(2) S_ISREG(dentry->d_inode) to d_is_reg(dentry).
(3) S_ISDIR(dentry->d_inode) to d_is_dir(dentry). This is actually more
complicated than it appears as some calls should be converted to
d_can_lookup() instead. The difference is whether the directory in
question is a real dir with a ->lookup op or whether it's a fake dir with
a ->d_automount op.
In some circumstances, we can subsume checks for dentry->d_inode not being
NULL into this, provided we the code isn't in a filesystem that expects
d_inode to be NULL if the dirent really *is* negative (ie. if we're going to
use d_inode() rather than d_backing_inode() to get the inode pointer).
Note that the dentry type field may be set to something other than
DCACHE_MISS_TYPE when d_inode is NULL in the case of unionmount, where the VFS
manages the fall-through from a negative dentry to a lower layer. In such a
case, the dentry type of the negative union dentry is set to the same as the
type of the lower dentry.
However, if you know d_inode is not NULL at the call site, then you can use
the d_is_xxx() functions even in a filesystem.
There is one further complication: a 0,0 chardev dentry may be labelled
DCACHE_WHITEOUT_TYPE rather than DCACHE_SPECIAL_TYPE. Strictly, this was
intended for special directory entry types that don't have attached inodes.
The following perl+coccinelle script was used:
use strict;
my @callers;
open($fd, 'git grep -l \'S_IS[A-Z].*->d_inode\' |') ||
die "Can't grep for S_ISDIR and co. callers";
@callers = <$fd>;
close($fd);
unless (@callers) {
print "No matches\n";
exit(0);
}
my @cocci = (
'@@',
'expression E;',
'@@',
'',
'- S_ISLNK(E->d_inode->i_mode)',
'+ d_is_symlink(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISDIR(E->d_inode->i_mode)',
'+ d_is_dir(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISREG(E->d_inode->i_mode)',
'+ d_is_reg(E)' );
my $coccifile = "tmp.sp.cocci";
open($fd, ">$coccifile") || die $coccifile;
print($fd "$_\n") || die $coccifile foreach (@cocci);
close($fd);
foreach my $file (@callers) {
chomp $file;
print "Processing ", $file, "\n";
system("spatch", "--sp-file", $coccifile, $file, "--in-place", "--no-show-diff") == 0 ||
die "spatch failed";
}
[AV: overlayfs parts skipped]
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-01-29 12:02:35 +00:00
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2011-08-15 16:59:55 -04:00
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2005-04-16 15:20:36 -07:00
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2025-01-26 16:50:20 -05:00
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2012-06-12 16:20:33 +02:00
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2025-01-26 16:50:20 -05:00
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2012-06-12 16:20:33 +02:00
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2005-04-16 15:20:36 -07:00
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2015-03-17 22:25:59 +00:00
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2025-11-13 11:18:27 +11:00
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2005-04-16 15:20:36 -07:00
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2022-07-26 16:45:30 +10:00
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2025-01-26 16:50:20 -05:00
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2025-11-13 11:18:27 +11:00
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2022-07-26 16:45:30 +10:00
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2005-04-16 15:20:36 -07:00
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2011-01-11 13:55:46 -05:00
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2015-03-17 22:25:59 +00:00
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2025-11-13 11:18:27 +11:00
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2023-07-21 10:29:10 -04:00
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2025-11-13 11:18:27 +11:00
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2023-01-13 12:49:10 +01:00
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2022-07-26 16:45:30 +10:00
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2025-11-13 11:18:27 +11:00
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2025-11-13 11:18:37 +11:00
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2006-10-19 23:28:58 -07:00
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2025-01-26 16:50:20 -05:00
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2005-04-16 15:20:36 -07:00
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2025-01-26 16:50:20 -05:00
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2022-07-26 16:45:30 +10:00
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2012-06-12 16:20:33 +02:00
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2025-01-26 16:50:20 -05:00
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2005-04-16 15:20:36 -07:00
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2025-01-26 16:50:20 -05:00
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2005-04-16 15:20:36 -07:00
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|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
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2025-01-26 16:50:19 -05:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2025-11-13 11:18:33 +11:00
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2025-01-26 16:50:19 -05:00
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2025-11-13 11:18:33 +11:00
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2006-10-19 23:28:58 -07:00
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2025-11-13 11:18:33 +11:00
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2005-04-16 15:20:36 -07:00
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2025-05-03 15:59:27 -04:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2024-07-29 11:47:22 +10:00
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|
2023-10-14 21:34:40 -04:00
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|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
2025-11-13 11:18:33 +11:00
|
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|
2012-06-12 16:20:33 +02:00
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2025-11-13 11:18:33 +11:00
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2024-03-18 17:32:09 +01:00
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2023-11-20 20:02:11 -05:00
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2023-07-21 10:29:10 -04:00
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2005-04-16 15:20:36 -07:00
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2025-11-13 11:18:33 +11:00
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2005-04-16 15:20:36 -07:00
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2025-11-13 11:18:33 +11:00
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2005-04-16 15:20:36 -07:00
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2025-11-13 11:18:33 +11:00
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nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
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|
2022-09-08 18:14:19 -04:00
|
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2025-11-13 11:18:33 +11:00
|
|
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|
2022-09-08 18:14:19 -04:00
|
|
|
|
|
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
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2005-04-16 15:20:36 -07:00
|
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2025-01-26 16:50:19 -05:00
|
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|
2022-07-26 16:45:30 +10:00
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
None of this is really necessary for "typical" filesystems though. It's
mostly of use for NFS, so declare a new export op flag and use that to
determine whether to close the files beforehand.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Lance Shelton <lance.shelton@hammerspace.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2020-11-30 17:03:16 -05:00
|
|
|
|
2021-12-24 14:36:49 -05:00
|
|
|
|
|
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
2023-07-21 10:29:10 -04:00
|
|
|
|
2025-11-13 11:18:33 +11:00
|
|
|
|
2024-03-18 17:32:09 +01:00
|
|
|
|
2012-06-12 16:20:33 +02:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
2023-12-15 12:18:31 +11:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
None of this is really necessary for "typical" filesystems though. It's
mostly of use for NFS, so declare a new export op flag and use that to
determine whether to close the files beforehand.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Lance Shelton <lance.shelton@hammerspace.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2020-11-30 17:03:16 -05:00
|
|
|
|
2025-11-13 11:18:33 +11:00
|
|
|
|
|
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2025-01-26 16:50:18 -05:00
|
|
|
|
|
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|
|
|
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|
|
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|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-10-19 23:28:58 -07:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
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|
|
|
|
2025-11-13 11:18:28 +11:00
|
|
|
|
2006-10-19 23:28:58 -07:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2025-05-03 15:59:26 -04:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2008-06-16 13:20:29 +02:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-06-12 16:20:33 +02:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2015-03-17 22:25:59 +00:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2025-11-13 11:18:28 +11:00
|
|
|
|
|
|
|
|
|
2006-10-19 23:28:58 -07:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2025-11-13 11:18:28 +11:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2023-07-21 10:29:10 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2025-11-13 11:18:28 +11:00
|
|
|
|
|
|
|
|
|
2023-07-21 10:29:10 -04:00
|
|
|
|
2025-11-13 11:18:28 +11:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2015-03-17 22:25:59 +00:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
2022-09-08 18:14:25 -04:00
|
|
|
|
|
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
None of this is really necessary for "typical" filesystems though. It's
mostly of use for NFS, so declare a new export op flag and use that to
determine whether to close the files beforehand.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Lance Shelton <lance.shelton@hammerspace.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2020-11-30 17:03:16 -05:00
|
|
|
|
|
|
|
|
|
2022-09-08 18:14:25 -04:00
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:10 +01:00
|
|
|
|
2022-09-08 18:14:25 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
2025-11-11 09:12:48 -05:00
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
|
|
|
|
2022-07-26 16:45:30 +10:00
|
|
|
|
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
It's not uncommon for some workloads to do a bunch of I/O to a file and
delete it just afterward. If knfsd has a cached open file however, then
the file may still be open when the dentry is unlinked. If the
underlying filesystem is nfs, then that could trigger it to do a
sillyrename.
On a REMOVE or RENAME scan the nfsd_file cache for open files that
correspond to the inode, and proactively unhash and put their
references. This should prevent any delete-on-last-close activity from
occurring, solely due to knfsd's open file cache.
This must be done synchronously though so we use the variants that call
flush_delayed_fput. There are deadlock possibilities if you call
flush_delayed_fput while holding locks, however. In the case of
nfsd_rename, we don't even do the lookups of the dentries to be renamed
until we've locked for rename.
Once we've figured out what the target dentry is for a rename, check to
see whether there are cached open files associated with it. If there
are, then unwind all of the locking, close them all, and then reattempt
the rename.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-08-18 14:18:57 -04:00
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2025-11-13 11:18:28 +11:00
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2011-01-14 20:00:02 -05:00
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2021-05-14 11:58:29 +08:00
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2005-04-16 15:20:36 -07:00
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2019-04-12 16:26:30 -04:00
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2005-04-16 15:20:36 -07:00
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2019-11-28 13:56:43 +11:00
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2025-01-26 16:50:18 -05:00
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2019-11-28 13:56:43 +11:00
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2025-01-26 16:50:18 -05:00
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2019-11-28 13:56:43 +11:00
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2006-01-18 17:43:13 -08:00
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2025-01-26 16:50:17 -05:00
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2005-04-16 15:20:36 -07:00
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2008-07-31 20:29:12 +01:00
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2013-05-15 13:52:59 -04:00
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2008-07-31 20:29:12 +01:00
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2008-08-24 07:29:52 -04:00
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2008-07-31 20:29:12 +01:00
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2022-08-16 11:57:56 -04:00
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2014-10-30 17:37:34 +01:00
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2008-07-31 17:16:51 +01:00
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2014-10-30 17:37:34 +01:00
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2008-07-31 20:29:12 +01:00
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2008-08-24 07:29:52 -04:00
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2022-08-16 11:57:56 -04:00
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2008-08-24 07:29:52 -04:00
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2008-07-31 20:29:12 +01:00
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2022-08-16 11:57:56 -04:00
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2008-07-31 20:29:12 +01:00
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2021-03-05 13:57:40 -05:00
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2008-07-31 20:29:12 +01:00
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2008-07-31 17:16:51 +01:00
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2008-07-31 20:29:12 +01:00
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2013-05-22 22:22:04 -04:00
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2026-05-23 20:54:19 +03:00
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2013-05-22 22:22:04 -04:00
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2008-07-31 17:16:51 +01:00
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2008-07-31 20:29:12 +01:00
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2009-04-20 23:18:37 +01:00
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2008-07-31 17:16:51 +01:00
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2008-07-31 20:29:12 +01:00
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Fix nfsd truncation of readdir results
Commit 8d7c4203 "nfsd: fix failure to set eof in readdir in some
situations" introduced a bug: on a directory in an exported ext3
filesystem with dir_index unset, a READDIR will only return about 250
entries, even if the directory was larger.
Bisected it back to this commit; reverting it fixes the problem.
It turns out that in this case ext3 reads a block at a time, then
returns from readdir, which means we can end up with buf.full==0 but
with more entries in the directory still to be read. Before 8d7c4203
(but after c002a6c797 "Optimise NFS readdir hack slightly"), this would
cause us to return the READDIR result immediately, but with the eof bit
unset. That could cause a performance regression (because the client
would need more roundtrips to the server to read the whole directory),
but no loss in correctness, since the cleared eof bit caused the client
to send another readdir. After 8d7c4203, the setting of the eof bit
made this a correctness problem.
So, move nfserr_eof into the loop and remove the buf.full check so that
we loop until buf.used==0. The following seems to do the right thing
and reduces the network traffic since we don't return a READDIR result
until the buffer is full.
Tested on an empty directory & large directory; eof is properly sent and
there are no more short buffers.
Signed-off-by: Doug Nazar <nazard@dragoninc.ca>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2008-11-05 06:16:28 -05:00
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2008-07-31 20:29:12 +01:00
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2008-08-24 07:29:52 -04:00
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2008-07-31 20:29:12 +01:00
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2013-05-15 13:52:59 -04:00
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2008-08-24 07:29:52 -04:00
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2008-07-31 20:29:12 +01:00
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2009-04-20 23:18:37 +01:00
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2008-07-31 20:29:12 +01:00
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2009-04-20 23:18:37 +01:00
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2008-07-31 20:29:12 +01:00
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2021-03-05 13:57:40 -05:00
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2008-07-31 20:29:12 +01:00
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2009-04-20 23:18:37 +01:00
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2008-08-17 17:21:18 +01:00
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2008-07-31 20:29:12 +01:00
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2026-05-23 20:54:19 +03:00
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2008-07-31 17:16:51 +01:00
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2008-07-31 20:29:12 +01:00
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2008-07-31 17:16:51 +01:00
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2023-11-19 20:17:11 -05:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2014-10-30 17:37:34 +01:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2005-04-16 15:20:36 -07:00
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2012-03-18 22:44:50 -04:00
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2005-04-16 15:20:36 -07:00
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2012-03-18 22:44:50 -04:00
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2005-04-16 15:20:36 -07:00
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2024-11-06 16:55:05 -05:00
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2012-04-25 15:30:00 -04:00
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2005-04-16 15:20:36 -07:00
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2021-03-05 13:57:40 -05:00
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2005-04-16 15:20:36 -07:00
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2023-12-15 12:18:31 +11:00
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2005-04-16 15:20:36 -07:00
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2023-12-15 12:18:31 +11:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2008-08-07 13:00:20 -04:00
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2005-04-16 15:20:36 -07:00
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2010-07-07 18:53:11 +02:00
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2025-05-03 15:59:29 -04:00
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2010-07-07 18:53:11 +02:00
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2010-08-13 15:53:49 +02:00
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2005-04-16 15:20:36 -07:00
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2024-07-26 12:21:31 +10:00
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2007-07-19 01:49:20 -07:00
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2024-07-26 12:21:31 +10:00
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2007-07-19 01:49:20 -07:00
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2020-06-23 22:39:23 +00:00
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2023-01-13 12:49:22 +01:00
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2020-06-23 22:39:23 +00:00
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NFSD: Clean up xattr memory allocation flags
Tetsuo Handa points out:
> Since GFP_KERNEL is "GFP_NOFS | __GFP_FS", usage like
> "GFP_KERNEL | GFP_NOFS" does not make sense.
The original intent was to hold the inode lock while estimating
the buffer requirements for the requested information. Frank van
der Linden, the author of NFSD's xattr code, says:
> ... you need inode_lock to get an atomic view of an xattr. Since
> both nfsd_getxattr and nfsd_listxattr to the standard trick of
> querying the xattr length with a NULL buf argument (just getting
> the length back), allocating the right buffer size, and then
> querying again, they need to hold the inode lock to avoid having
> the xattr changed from under them while doing that.
>
> From that then flows the requirement that GFP_FS could cause
> problems while holding i_rwsem, so I added GFP_NOFS.
However, Dave Chinner states:
> You can do GFP_KERNEL allocations holding the i_rwsem just fine.
> All that it requires is the caller holds a reference to the
> inode ...
Since these code paths acquire a dentry, they do indeed hold a
reference. It is therefore safe to use GFP_KERNEL for these memory
allocations. In particular, that's what this code is already doing;
but now the C source code looks sane too.
At a later time we can revisit in order to remove the inode lock in
favor of simply retrying if the estimated buffer size is too small.
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-20 11:02:33 -04:00
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2020-06-23 22:39:23 +00:00
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2023-01-13 12:49:22 +01:00
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2020-06-23 22:39:23 +00:00
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NFSD: Clean up xattr memory allocation flags
Tetsuo Handa points out:
> Since GFP_KERNEL is "GFP_NOFS | __GFP_FS", usage like
> "GFP_KERNEL | GFP_NOFS" does not make sense.
The original intent was to hold the inode lock while estimating
the buffer requirements for the requested information. Frank van
der Linden, the author of NFSD's xattr code, says:
> ... you need inode_lock to get an atomic view of an xattr. Since
> both nfsd_getxattr and nfsd_listxattr to the standard trick of
> querying the xattr length with a NULL buf argument (just getting
> the length back), allocating the right buffer size, and then
> querying again, they need to hold the inode lock to avoid having
> the xattr changed from under them while doing that.
>
> From that then flows the requirement that GFP_FS could cause
> problems while holding i_rwsem, so I added GFP_NOFS.
However, Dave Chinner states:
> You can do GFP_KERNEL allocations holding the i_rwsem just fine.
> All that it requires is the caller holds a reference to the
> inode ...
Since these code paths acquire a dentry, they do indeed hold a
reference. It is therefore safe to use GFP_KERNEL for these memory
allocations. In particular, that's what this code is already doing;
but now the C source code looks sane too.
At a later time we can revisit in order to remove the inode lock in
favor of simply retrying if the estimated buffer size is too small.
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-20 11:02:33 -04:00
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2020-06-23 22:39:23 +00:00
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2022-07-26 16:45:30 +10:00
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2020-06-23 22:39:23 +00:00
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2020-09-11 14:47:48 -04:00
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2020-06-23 22:39:23 +00:00
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2022-07-26 16:45:30 +10:00
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2023-07-21 10:29:10 -04:00
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2023-01-13 12:49:22 +01:00
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2021-01-21 14:19:28 +01:00
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2023-07-21 10:29:10 -04:00
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2022-07-26 16:45:30 +10:00
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2023-07-21 10:29:10 -04:00
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2022-07-26 16:45:30 +10:00
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2020-06-23 22:39:23 +00:00
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2023-07-21 10:29:10 -04:00
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2020-06-23 22:39:23 +00:00
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2020-09-11 14:47:48 -04:00
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2020-06-23 22:39:23 +00:00
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2022-07-26 16:45:30 +10:00
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2023-07-21 10:29:10 -04:00
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2022-07-26 16:45:30 +10:00
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2023-07-21 10:29:10 -04:00
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2022-07-26 16:45:30 +10:00
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2020-06-23 22:39:23 +00:00
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2023-07-21 10:29:10 -04:00
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2020-06-23 22:39:23 +00:00
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2005-04-16 15:20:36 -07:00
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2006-10-19 23:28:58 -07:00
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2024-07-26 12:21:31 +10:00
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2005-04-16 15:20:36 -07:00
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2015-03-17 22:25:59 +00:00
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2005-04-16 15:20:36 -07:00
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2011-04-10 10:35:12 -04:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2024-10-18 08:42:31 +11:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2008-02-15 14:37:56 -08:00
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2005-04-16 15:20:36 -07:00
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2008-11-14 10:38:58 +11:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2024-07-26 12:21:31 +10:00
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2008-02-15 14:37:56 -08:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2013-02-02 06:53:11 -08:00
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2005-04-16 15:20:36 -07:00
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2008-06-16 13:20:29 +02:00
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2023-01-13 12:49:22 +01:00
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2021-01-21 14:19:24 +01:00
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2005-04-16 15:20:36 -07:00
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2025-12-11 07:34:34 -05:00
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2023-01-13 12:49:22 +01:00
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2005-04-16 15:20:36 -07:00
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nfsd: Report export case-folding via NFSv3 PATHCONF
The hard-coded MSDOS_SUPER_MAGIC check in nfsd3_proc_pathconf()
only recognizes FAT filesystems as case-insensitive. Modern
filesystems like F2FS, exFAT, and CIFS support case-insensitive
directories, but NFSv3 clients cannot discover this capability.
Query the export's actual case behavior through ->fileattr_get
instead. This allows NFSv3 clients to correctly handle case
sensitivity for any filesystem that implements the fileattr
interface. Filesystems without ->fileattr_get continue to report
the default POSIX behavior (case-sensitive, case-preserving).
This change depends on the earlier "fat: Implement fileattr_get
for case sensitivity" patch in this series, which ensures FAT
filesystems report their case behavior correctly via the
fileattr interface.
Case-folding is a per-directory property, so
nfsd_get_case_info() queries the parent dentry for
non-directory filehandles. Three inherent corner cases follow:
a single-file export's parent lies outside the exported
subtree, so the LSM hook evaluates against an unexported
directory; a disconnected dentry from fh_verify() has
d_parent == itself, so the file's own attributes are reported
until the dentry connects; and a hardlinked file resolves
through the alias the dcache currently holds, so when the
inode is linked into both case-folded and case-sensitive
directories the reported value tracks whichever parent is
active. These limitations are not addressable without
redefining the protocol attribute as per-parent rather than
per-object.
RFC 1813 restricts PATHCONF errors to NFS3ERR_STALE,
NFS3ERR_BADHANDLE, and NFS3ERR_SERVERFAULT. When an LSM hook
denies the case-folding query on the parent, NFS3ERR_STALE is
the only correct mapping: NFS3ERR_SERVERFAULT misrepresents a
working server as broken, and NFS3ERR_BADHANDLE implies a
decoding failure that did not occur. A client purging the
filehandle on receipt is the desired outcome, since the server
has refused to read attributes through it. Substituting POSIX
defaults instead would let the same handle report
casefold=false now and casefold=true once policy permits,
opening a silent name-collision window on case-insensitive
exports.
Reviewed-by: Roland Mainz <roland.mainz@nrubsig.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260507-case-sensitivity-v14-13-e62cc8200435@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-05-07 04:53:06 -04:00
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2026-05-15 11:35:13 -04:00
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nfsd: Report export case-folding via NFSv3 PATHCONF
The hard-coded MSDOS_SUPER_MAGIC check in nfsd3_proc_pathconf()
only recognizes FAT filesystems as case-insensitive. Modern
filesystems like F2FS, exFAT, and CIFS support case-insensitive
directories, but NFSv3 clients cannot discover this capability.
Query the export's actual case behavior through ->fileattr_get
instead. This allows NFSv3 clients to correctly handle case
sensitivity for any filesystem that implements the fileattr
interface. Filesystems without ->fileattr_get continue to report
the default POSIX behavior (case-sensitive, case-preserving).
This change depends on the earlier "fat: Implement fileattr_get
for case sensitivity" patch in this series, which ensures FAT
filesystems report their case behavior correctly via the
fileattr interface.
Case-folding is a per-directory property, so
nfsd_get_case_info() queries the parent dentry for
non-directory filehandles. Three inherent corner cases follow:
a single-file export's parent lies outside the exported
subtree, so the LSM hook evaluates against an unexported
directory; a disconnected dentry from fh_verify() has
d_parent == itself, so the file's own attributes are reported
until the dentry connects; and a hardlinked file resolves
through the alias the dcache currently holds, so when the
inode is linked into both case-folded and case-sensitive
directories the reported value tracks whichever parent is
active. These limitations are not addressable without
redefining the protocol attribute as per-parent rather than
per-object.
RFC 1813 restricts PATHCONF errors to NFS3ERR_STALE,
NFS3ERR_BADHANDLE, and NFS3ERR_SERVERFAULT. When an LSM hook
denies the case-folding query on the parent, NFS3ERR_STALE is
the only correct mapping: NFS3ERR_SERVERFAULT misrepresents a
working server as broken, and NFS3ERR_BADHANDLE implies a
decoding failure that did not occur. A client purging the
filehandle on receipt is the desired outcome, since the server
has refused to read attributes through it. Substituting POSIX
defaults instead would let the same handle report
casefold=false now and casefold=true once policy permits,
opening a silent name-collision window on case-insensitive
exports.
Reviewed-by: Roland Mainz <roland.mainz@nrubsig.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260507-case-sensitivity-v14-13-e62cc8200435@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-05-07 04:53:06 -04:00
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