linux/Documentation/filesystems
Jeff Layton 12965a190e
filelock: allow lease_managers to dictate what qualifies as a conflict
Requesting a delegation on a file from the userland fcntl() interface
currently succeeds when there are conflicting opens present.

This is because the lease handling code ignores conflicting opens for
FL_LAYOUT and FL_DELEG leases. This was a hack put in place long ago,
because nfsd already checks for conflicts in its own way. The kernel
needs to perform this check for userland delegations the same way it is
done for leases, however.

Make this dependent on the lease_manager by adding a new
->lm_open_conflict() lease_manager operation and have
generic_add_lease() call that instead of check_conflicting_open().
Morph check_conflicting_open() into a ->lm_open_conflict() op that is
only called for userland leases/delegations. Set the
->lm_open_conflict() operations for nfsd to trivial functions that
always return 0.

Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20251204-dir-deleg-ro-v2-2-22d37f92ce2c@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-12-15 15:20:33 +01:00
..
caching doc: correcting the debug path for cachefiles 2024-10-24 13:50:27 +02:00
ext4 Documentation: ext4: Document casefold and encrypt flags 2025-11-26 17:13:34 -05:00
fuse Documentation: fuse: Consolidate FUSE docs into its own subdirectory 2025-08-27 14:29:43 +02:00
gfs2 Documentation: gfs2: Consolidate GFS2 docs into its own subdirectory 2025-10-31 21:00:43 +00:00
iomap fs, iomap: remove IOCB_DIO_CALLER_COMP 2025-11-25 10:22:18 +01:00
nfs NFSD: nfsd-io-modes: Separate lists 2025-12-03 09:05:14 -05:00
smb cifs: add documentation for smbdirect setup 2025-06-05 10:20:48 -05:00
spufs Documentation: spufs: correct a duplicate word typo 2022-09-27 13:21:44 -06:00
xfs xfs: new code for v6.19 2025-12-03 20:19:38 -08:00
9p.rst 9p update for 6.15-rc1 2025-04-03 15:35:46 -07:00
adfs.rst
affs.rst
afs.rst afs: Documentation: correct reference to CONFIG_AFS_FS 2023-07-21 13:46:02 -06:00
api-summary.rst doc: split buffer.rst out of api-summary.rst 2024-05-05 17:53:40 -07:00
autofs-mount-control.rst autofs: use flexible array in ioctl structure 2023-05-30 16:42:00 -07:00
autofs.rst Documentation: filesystems: update filename extensions 2024-11-22 10:31:04 -07:00
automount-support.rst
befs.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
bfs.rst
btrfs.rst MAINTAINERS: remove links to obsolete btrfs.wiki.kernel.org 2023-09-08 14:21:27 +02:00
buffer.rst doc: split buffer.rst out of api-summary.rst 2024-05-05 17:53:40 -07:00
ceph.rst doc: ceph: update userspace command to get CephFS metadata 2024-05-23 10:35:47 +02:00
coda.rst documentation/filesystems: fix spelling mistakes 2025-02-10 10:42:28 -07:00
configfs.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
cramfs.rst
dax.rst doc: Remove misleading reference to brd in dax.rst 2025-06-25 12:49:29 -06:00
debugfs.rst docs: debugfs: do not recommend debugfs_remove_recursive 2025-04-30 19:11:04 +02:00
devpts.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
directory-locking.rst Docs: typos/spelling 2024-05-02 10:02:29 -06:00
dlmfs.rst Documentation: filesystems: update filename extensions 2024-11-22 10:31:04 -07:00
dnotify.rst
ecryptfs.rst
efivarfs.rst Documentation: Mark the 'efivars' sysfs interface as removed 2024-04-13 10:33:02 +02:00
erofs.rst Documentation: Fix filesystems typos 2025-08-18 10:31:19 -06:00
ext2.rst ext2: remove nobh support 2022-08-02 12:34:04 -04:00
ext3.rst
f2fs.rst docs: f2fs: wrap ASCII tables in literal blocks to fix LaTeX build 2025-12-04 02:00:05 +00:00
fiemap.rst fiemap: use kernel-doc includes in fiemap docbook 2024-12-22 11:29:50 +01:00
files.rst docs: filesystems: fix typo in docs 2024-02-09 10:37:20 +01:00
fscrypt.rst fscrypt: Drop obsolete recommendation to enable optimized POLYVAL 2025-11-11 11:03:39 -08:00
fsverity.rst fsverity: Switch from crypto_shash to SHA-2 library 2025-07-14 11:29:32 -07:00
hfs.rst
hfsplus.rst
hpfs.rst Documentation: Fix filesystems typos 2025-08-18 10:31:19 -06:00
idmappings.rst doc: correcting two prefix errors in idmappings.rst 2025-03-05 11:54:18 +01:00
index.rst Documentation: gfs2: Consolidate GFS2 docs into its own subdirectory 2025-10-31 21:00:43 +00:00
inotify.rst
isofs.rst
journalling.rst jbd2: remove unused transaction->t_private_list 2025-02-10 07:48:24 -05:00
locking.rst filelock: allow lease_managers to dictate what qualifies as a conflict 2025-12-15 15:20:33 +01:00
locks.rst docs: fs: locks.rst: update comment about mandatory file locking 2021-10-19 06:48:21 -04:00
mount_api.rst change the calling conventions for vfs_parse_fs_string() 2025-09-04 15:20:51 -04:00
multigrain-ts.rst Documentation: add a new file documenting multigrain timestamps 2024-10-10 10:20:52 +02:00
netfs_library.rst fs/netfs: remove unused flag NETFS_SREQ_SEEK_DATA_READ 2025-05-21 14:34:37 +02:00
nilfs2.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
ntfs3.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
ocfs2-online-filecheck.rst Documentation: ocfs2: Properly reindent filecheck operations list 2025-08-29 15:50:50 -06:00
ocfs2.rst docs: update ocfs2-devel mailing list address 2023-07-08 09:29:29 -07:00
omfs.rst
orangefs.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
overlayfs.rst overlayfs.rst: fix typos 2025-07-15 13:53:46 -06:00
path-lookup.rst Documentation: filesystems: update filename extensions 2024-11-22 10:31:04 -07:00
path-lookup.txt Documentation: filesystems: update filename extensions 2024-11-22 10:31:04 -07:00
porting.rst Some filesystems use a kinda-sorta controlled dentry refcount leak to pin 2025-12-05 14:36:21 -08:00
proc.rst mm: introduce VM_MAYBE_GUARD and make visible in /proc/$pid/smaps 2025-11-20 13:43:58 -08:00
propagate_umount.txt docs: fix trailing whitespace error and remove repeated words in propagate_umount.txt 2025-08-21 12:49:01 -06:00
qnx6.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
quota.rst
ramfs-rootfs-initramfs.rst docs: replace broken links in ramfs-rootfs-initramfs docs 2025-10-29 16:19:26 -06:00
relay.rst - The 3 patch series "hung_task: extend blocking task stacktrace dump to 2025-05-31 19:12:53 -07:00
resctrl.rst fs/resctrl: Update bit_usage to reflect io_alloc 2025-11-22 14:30:34 +01:00
romfs.rst
seq_file.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
sharedsubtree.rst Documentation: sharedsubtree: Convert notes to note directive 2025-08-29 16:40:01 -06:00
splice.rst
squashfs.rst Documentation: update the Squashfs filesystem documentation 2025-01-24 22:47:21 -08:00
sysfs.rst It has been a relatively busy cycle in docsland, with changes all over: 2025-10-03 17:16:13 -07:00
tmpfs.rst docs: tmpfs: Add casefold options 2024-10-28 13:36:55 +01:00
ubifs-authentication.rst Documentation: treewide: Replace remaining spinics links with lore 2025-06-21 14:20:51 -06:00
ubifs.rst Documentation: ubifs: Fix compression idiom 2022-10-10 13:01:10 -06:00
udf.rst
vfat.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00
vfs.rst doc: update porting, vfs documentation for mmap_prepare actions 2025-11-16 17:28:13 -08:00
virtiofs.rst
zonefs.rst Documentation: Fix typos 2023-08-18 11:29:03 -06:00