From: Christian Brauner <[email protected]> Document mnt_clone_internal().
Cc: Amir Goldstein <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Miklos Szeredi <[email protected]> Cc: Al Viro <[email protected]> Cc: [email protected] Signed-off-by: Christian Brauner <[email protected]> --- fs/namespace.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/fs/namespace.c b/fs/namespace.c index 02f415061efe..7ffefa8b3980 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1271,6 +1271,22 @@ bool path_is_mountpoint(const struct path *path) } EXPORT_SYMBOL(path_is_mountpoint); +/** + * mnt_clone_internal - create a private clone of a path + * @path: path from which the mnt to clone will be taken + * + * This creates a new vfsmount, which will be a clone of @path's vfsmount. + * + * In contrast to clone_private_mount() the new mount will be marked + * MNT_INTERNAL and will note have any mount namespace attached making it + * suitable for short-lived internal mounts since mntput()ing it will always + * hit the slowpath taking the mount lock. + * + * Since the mount is not reachable anwyhere mount properties and propagation + * properties remain stable, i.e. cannot change. + * + * Return: A clone of @path's vfsmount on success, an error pointer on failure. + */ struct vfsmount *mnt_clone_internal(const struct path *path) { struct mount *p; -- 2.27.0 -- Linux-cachefs mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-cachefs
