On Thu, Nov 30, 2023 at 07:32:19AM +0200, Amir Goldstein wrote:

On Wed, Nov 29, 2023 at 11:51 PM Seth Forshee (DigitalOcean)
[off-list ref] wrote:

quoted

Add inode operations for getting, setting and removing filesystem
capabilities rather than passing around raw xattr data. This provides
better type safety for ids contained within xattrs.

Signed-off-by: Seth Forshee (DigitalOcean) <sforshee@kernel.org>
---
 include/linux/fs.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 98b7a7a8c42e..a0a77f67b999 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h

@@ -2002,6 +2002,11 @@ struct inode_operations {
                                     int);
        int (*set_acl)(struct mnt_idmap *, struct dentry *,
                       struct posix_acl *, int);
+       int (*get_fscaps)(struct mnt_idmap *, struct dentry *,
+                         struct vfs_caps *);
+       int (*set_fscaps)(struct mnt_idmap *, struct dentry *,
+                         const struct vfs_caps *, int flags);
+       int (*remove_fscaps)(struct mnt_idmap *, struct dentry *);
        int (*fileattr_set)(struct mnt_idmap *idmap,
                            struct dentry *dentry, struct fileattr *fa);
        int (*fileattr_get)(struct dentry *dentry, struct fileattr *fa);

Please document in Documentation/filesystems/{vfs,locking}.rst

Done for v2.