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filelock: add an inode_lease_ignore_mask helper

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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.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260428-dir-deleg-v3-4-5a0780ba9def@kernel.org
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Jeff Layton 2026-04-28 08:09:48 +01:00 committed by Christian Brauner
parent e39026a86b
commit 95825fdcc0
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2 changed files with 33 additions and 0 deletions
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32
fs/locks.c
View File

@ -1582,6 +1582,38 @@ static bool leases_conflict(struct file_lock_core *lc, struct file_lock_core *bc
return rc;
}
#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)
{

1
include/linux/filelock.h
View File

@ -236,6 +236,7 @@ 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 *);