[PATCH v3 18/38] filelock: add an inode_lease_ignore_mask helper
From: Jeff Layton <jlayton@kernel.org>
Date: 2025-09-24 18:07:17
Also in:
linux-cifs, linux-doc, linux-fsdevel, linux-nfs, linux-unionfs, linux-xfs, lkml, netfs
Subsystem:
file locking (flock() and fcntl()/lockf()), filesystems (vfs and infrastructure), the rest · Maintainers:
Jeff Layton, Chuck Lever, Alexander Viro, Christian Brauner, Linus Torvalds
Add a new routine that returns a mask of all dir change events that are currently ignored by any leases. nfsd will use this to determine how to configure the fsnotify_mark mask. Signed-off-by: Jeff Layton <jlayton@kernel.org> --- fs/locks.c | 32 ++++++++++++++++++++++++++++++++ include/linux/filelock.h | 1 + 2 files changed, 33 insertions(+)
diff --git a/fs/locks.c b/fs/locks.c
index d26372ea890cbcd1a47209adeca6778ec23449ab..79d8991b5ec43ac006acb73182fc53d5aff5d42d 100644
--- a/fs/locks.c
+++ b/fs/locks.c@@ -1526,6 +1526,38 @@ any_leases_conflict(struct inode *inode, struct file_lease *breaker) return false; } +#define IGNORE_MASK (FL_IGN_DIR_CREATE | FL_IGN_DIR_DELETE | FL_IGN_DIR_RENAME) + +/** + * inode_lease_ignore_mask - return union of all ignored inode events for this inode + * @inode: inode of which to get ignore mask + * + * Walk the list of leases, and return the result of all of + * their FL_IGN_DIR_* bits or'ed together. + */ +u32 +inode_lease_ignore_mask(struct inode *inode) +{ + struct file_lock_context *ctx; + struct file_lock_core *flc; + u32 mask = 0; + + ctx = locks_inode_context(inode); + if (!ctx) + return 0; + + spin_lock(&ctx->flc_lock); + list_for_each_entry(flc, &ctx->flc_lease, flc_list) { + mask |= flc->flc_flags & IGNORE_MASK; + /* If we already have everything, we can stop */ + if (mask == IGNORE_MASK) + break; + } + spin_unlock(&ctx->flc_lock); + return mask; +} +EXPORT_SYMBOL_GPL(inode_lease_ignore_mask); + static bool ignore_dir_deleg_break(struct file_lease *fl, unsigned int flags) {
diff --git a/include/linux/filelock.h b/include/linux/filelock.h
index 0f0e56490c7ba4242c1caa79c68ab1db459609d8..b35cb5dd85ff7e5dbb7712718613f4ddcd5839a5 100644
--- a/include/linux/filelock.h
+++ b/include/linux/filelock.h@@ -249,6 +249,7 @@ int generic_setlease(struct file *, int, struct file_lease **, void **priv); int kernel_setlease(struct file *, int, struct file_lease **, void **); int vfs_setlease(struct file *, int, struct file_lease **, void **); int lease_modify(struct file_lease *, int, struct list_head *); +u32 inode_lease_ignore_mask(struct inode *inode); struct notifier_block; int lease_register_notifier(struct notifier_block *);
--
2.51.0