Re: [PATCH] filelock: move file locking definitions to separate header file

[Xiubo Li <xiubli@xxxxxxxxxx>]

On 21/11/2022 04:59, Jeff Layton wrote:
> The file locking definitions have lived in fs.h since the dawn of time,
> but they are only used by a small subset of the source files that
> include it.
>
> Move the file locking definitions to a new header file, and add the
> appropriate #include directives to the source files that need them. By
> doing this we trim down fs.h a bit and limit the amount of rebuilding
> that has to be done when we make changes to the file locking APIs.
>
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
>   fs/9p/vfs_file.c          |   1 +
>   fs/afs/internal.h         |   1 +
>   fs/attr.c                 |   1 +
>   fs/ceph/locks.c           |   1 +
>   fs/cifs/cifsfs.c          |   1 +
>   fs/cifs/cifsglob.h        |   1 +
>   fs/cifs/cifssmb.c         |   1 +
>   fs/cifs/file.c            |   1 +
>   fs/cifs/smb2file.c        |   1 +
>   fs/dlm/plock.c            |   1 +
>   fs/fcntl.c                |   1 +
>   fs/file_table.c           |   1 +
>   fs/fuse/file.c            |   1 +
>   fs/gfs2/file.c            |   1 +
>   fs/inode.c                |   1 +
>   fs/ksmbd/smb2pdu.c        |   1 +
>   fs/ksmbd/vfs.c            |   1 +
>   fs/ksmbd/vfs_cache.c      |   1 +
>   fs/lockd/clntproc.c       |   1 +
>   fs/lockd/netns.h          |   1 +
>   fs/locks.c                |   1 +
>   fs/namei.c                |   1 +
>   fs/nfs/nfs4_fs.h          |   1 +
>   fs/nfs_common/grace.c     |   1 +
>   fs/nfsd/netns.h           |   1 +
>   fs/ocfs2/locks.c          |   1 +
>   fs/ocfs2/stack_user.c     |   1 +
>   fs/open.c                 |   1 +
>   fs/orangefs/file.c        |   1 +
>   fs/proc/fd.c              |   1 +
>   fs/utimes.c               |   1 +
>   fs/xattr.c                |   1 +
>   fs/xfs/xfs_buf.h          |   1 +
>   fs/xfs/xfs_file.c         |   1 +
>   fs/xfs/xfs_inode.c        |   1 +
>   include/linux/filelock.h  | 428 ++++++++++++++++++++++++++++++++++++++
>   include/linux/fs.h        | 421 -------------------------------------
>   include/linux/lockd/xdr.h |   1 +
>   38 files changed, 464 insertions(+), 421 deletions(-)
>   create mode 100644 include/linux/filelock.h
>
> Unless anyone has objections, I'll plan to merge this in via the file
> locking tree for v6.3. I'd appreciate Acked-bys or Reviewed-bys from
> maintainers, however.
>
> diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
> index aec43ba83799..5e3c4b5198a6 100644
> --- a/fs/9p/vfs_file.c
> +++ b/fs/9p/vfs_file.c
> @@ -9,6 +9,7 @@
>   #include <linux/module.h>
>   #include <linux/errno.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/sched.h>
>   #include <linux/file.h>
>   #include <linux/stat.h>
> diff --git a/fs/afs/internal.h b/fs/afs/internal.h
> index 723d162078a3..c41a82a08f8b 100644
> --- a/fs/afs/internal.h
> +++ b/fs/afs/internal.h
> @@ -9,6 +9,7 @@
>   #include <linux/kernel.h>
>   #include <linux/ktime.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/pagemap.h>
>   #include <linux/rxrpc.h>
>   #include <linux/key.h>
> diff --git a/fs/attr.c b/fs/attr.c
> index 1552a5f23d6b..e643f17a5465 100644
> --- a/fs/attr.c
> +++ b/fs/attr.c
> @@ -14,6 +14,7 @@
>   #include <linux/capability.h>
>   #include <linux/fsnotify.h>
>   #include <linux/fcntl.h>
> +#include <linux/filelock.h>
>   #include <linux/security.h>
>   #include <linux/evm.h>
>   #include <linux/ima.h>
> diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
> index f3b461c708a8..476f25bba263 100644
> --- a/fs/ceph/locks.c
> +++ b/fs/ceph/locks.c
> @@ -7,6 +7,7 @@
>   
>   #include "super.h"
>   #include "mds_client.h"
> +#include <linux/filelock.h>
>   #include <linux/ceph/pagelist.h>
>   
>   static u64 lock_secret;
> diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
> index fe220686bba4..8d255916b6bf 100644
> --- a/fs/cifs/cifsfs.c
> +++ b/fs/cifs/cifsfs.c
> @@ -12,6 +12,7 @@
>   
>   #include <linux/module.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/mount.h>
>   #include <linux/slab.h>
>   #include <linux/init.h>
> diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
> index 1420acf987f0..1b9fee67a25e 100644
> --- a/fs/cifs/cifsglob.h
> +++ b/fs/cifs/cifsglob.h
> @@ -25,6 +25,7 @@
>   #include <uapi/linux/cifs/cifs_mount.h>
>   #include "../smbfs_common/smb2pdu.h"
>   #include "smb2pdu.h"
> +#include <linux/filelock.h>
>   
>   #define SMB_PATH_MAX 260
>   #define CIFS_PORT 445
> diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
> index 1724066c1536..0410658c00bd 100644
> --- a/fs/cifs/cifssmb.c
> +++ b/fs/cifs/cifssmb.c
> @@ -15,6 +15,7 @@
>    /* want to reuse a stale file handle and only the caller knows the file info */
>   
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/kernel.h>
>   #include <linux/vfs.h>
>   #include <linux/slab.h>
> diff --git a/fs/cifs/file.c b/fs/cifs/file.c
> index 6c1431979495..c230e86f1e09 100644
> --- a/fs/cifs/file.c
> +++ b/fs/cifs/file.c
> @@ -9,6 +9,7 @@
>    *
>    */
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/backing-dev.h>
>   #include <linux/stat.h>
>   #include <linux/fcntl.h>
> diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
> index ffbd9a99fc12..1f421bfbe797 100644
> --- a/fs/cifs/smb2file.c
> +++ b/fs/cifs/smb2file.c
> @@ -7,6 +7,7 @@
>    *
>    */
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/stat.h>
>   #include <linux/slab.h>
>   #include <linux/pagemap.h>
> diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c
> index 737f185aad8d..ed4357e62f35 100644
> --- a/fs/dlm/plock.c
> +++ b/fs/dlm/plock.c
> @@ -4,6 +4,7 @@
>    */
>   
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/miscdevice.h>
>   #include <linux/poll.h>
>   #include <linux/dlm.h>
> diff --git a/fs/fcntl.c b/fs/fcntl.c
> index 146c9ab0cd4b..7852e946fdf4 100644
> --- a/fs/fcntl.c
> +++ b/fs/fcntl.c
> @@ -10,6 +10,7 @@
>   #include <linux/mm.h>
>   #include <linux/sched/task.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/file.h>
>   #include <linux/fdtable.h>
>   #include <linux/capability.h>
> diff --git a/fs/file_table.c b/fs/file_table.c
> index dd88701e54a9..372653b92617 100644
> --- a/fs/file_table.c
> +++ b/fs/file_table.c
> @@ -13,6 +13,7 @@
>   #include <linux/init.h>
>   #include <linux/module.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/security.h>
>   #include <linux/cred.h>
>   #include <linux/eventpoll.h>
> diff --git a/fs/fuse/file.c b/fs/fuse/file.c
> index 71bfb663aac5..0e6b3b8e2f27 100644
> --- a/fs/fuse/file.c
> +++ b/fs/fuse/file.c
> @@ -18,6 +18,7 @@
>   #include <linux/falloc.h>
>   #include <linux/uio.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   
>   static int fuse_send_open(struct fuse_mount *fm, u64 nodeid,
>   			  unsigned int open_flags, int opcode,
> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
> index 60c6fb91fb58..2a48c8df6d56 100644
> --- a/fs/gfs2/file.c
> +++ b/fs/gfs2/file.c
> @@ -15,6 +15,7 @@
>   #include <linux/mm.h>
>   #include <linux/mount.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/gfs2_ondisk.h>
>   #include <linux/falloc.h>
>   #include <linux/swap.h>
> diff --git a/fs/inode.c b/fs/inode.c
> index b608528efd3a..f32aa2ec148d 100644
> --- a/fs/inode.c
> +++ b/fs/inode.c
> @@ -5,6 +5,7 @@
>    */
>   #include <linux/export.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/mm.h>
>   #include <linux/backing-dev.h>
>   #include <linux/hash.h>
> diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
> index f2bcd2a5fb7f..d4d6f24790d6 100644
> --- a/fs/ksmbd/smb2pdu.c
> +++ b/fs/ksmbd/smb2pdu.c
> @@ -12,6 +12,7 @@
>   #include <linux/ethtool.h>
>   #include <linux/falloc.h>
>   #include <linux/mount.h>
> +#include <linux/filelock.h>
>   
>   #include "glob.h"
>   #include "smbfsctl.h"
> diff --git a/fs/ksmbd/vfs.c b/fs/ksmbd/vfs.c
> index f9e85d6a160e..f73c4e119ffd 100644
> --- a/fs/ksmbd/vfs.c
> +++ b/fs/ksmbd/vfs.c
> @@ -6,6 +6,7 @@
>   
>   #include <linux/kernel.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/uaccess.h>
>   #include <linux/backing-dev.h>
>   #include <linux/writeback.h>
> diff --git a/fs/ksmbd/vfs_cache.c b/fs/ksmbd/vfs_cache.c
> index da9163b00350..552c3882a8f4 100644
> --- a/fs/ksmbd/vfs_cache.c
> +++ b/fs/ksmbd/vfs_cache.c
> @@ -5,6 +5,7 @@
>    */
>   
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/slab.h>
>   #include <linux/vmalloc.h>
>   
> diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
> index 99fffc9cb958..e875a3571c41 100644
> --- a/fs/lockd/clntproc.c
> +++ b/fs/lockd/clntproc.c
> @@ -12,6 +12,7 @@
>   #include <linux/types.h>
>   #include <linux/errno.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/nfs_fs.h>
>   #include <linux/utsname.h>
>   #include <linux/freezer.h>
> diff --git a/fs/lockd/netns.h b/fs/lockd/netns.h
> index 5bec78c8e431..17432c445fe6 100644
> --- a/fs/lockd/netns.h
> +++ b/fs/lockd/netns.h
> @@ -3,6 +3,7 @@
>   #define __LOCKD_NETNS_H__
>   
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <net/netns/generic.h>
>   
>   struct lockd_net {
> diff --git a/fs/locks.c b/fs/locks.c
> index 8f01bee17715..a5cc90c958c9 100644
> --- a/fs/locks.c
> +++ b/fs/locks.c
> @@ -52,6 +52,7 @@
>   #include <linux/capability.h>
>   #include <linux/file.h>
>   #include <linux/fdtable.h>
> +#include <linux/filelock.h>
>   #include <linux/fs.h>
>   #include <linux/init.h>
>   #include <linux/security.h>
> diff --git a/fs/namei.c b/fs/namei.c
> index 578c2110df02..d5121f51f900 100644
> --- a/fs/namei.c
> +++ b/fs/namei.c
> @@ -20,6 +20,7 @@
>   #include <linux/kernel.h>
>   #include <linux/slab.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/namei.h>
>   #include <linux/pagemap.h>
>   #include <linux/sched/mm.h>
> diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
> index cfef738d765e..9822ad1aabef 100644
> --- a/fs/nfs/nfs4_fs.h
> +++ b/fs/nfs/nfs4_fs.h
> @@ -23,6 +23,7 @@
>   #define NFS4_MAX_LOOP_ON_RECOVER (10)
>   
>   #include <linux/seqlock.h>
> +#include <linux/filelock.h>
>   
>   struct idmap;
>   
> diff --git a/fs/nfs_common/grace.c b/fs/nfs_common/grace.c
> index 0a9b72685f98..1479583fbb62 100644
> --- a/fs/nfs_common/grace.c
> +++ b/fs/nfs_common/grace.c
> @@ -9,6 +9,7 @@
>   #include <net/net_namespace.h>
>   #include <net/netns/generic.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   
>   static unsigned int grace_net_id;
>   static DEFINE_SPINLOCK(grace_lock);
> diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
> index 8c854ba3285b..bc139401927d 100644
> --- a/fs/nfsd/netns.h
> +++ b/fs/nfsd/netns.h
> @@ -10,6 +10,7 @@
>   
>   #include <net/net_namespace.h>
>   #include <net/netns/generic.h>
> +#include <linux/filelock.h>
>   #include <linux/percpu_counter.h>
>   #include <linux/siphash.h>
>   
> diff --git a/fs/ocfs2/locks.c b/fs/ocfs2/locks.c
> index 73a3854b2afb..f37174e79fad 100644
> --- a/fs/ocfs2/locks.c
> +++ b/fs/ocfs2/locks.c
> @@ -8,6 +8,7 @@
>    */
>   
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/fcntl.h>
>   
>   #include <cluster/masklog.h>
> diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
> index 64e6ddcfe329..05d4414d0c33 100644
> --- a/fs/ocfs2/stack_user.c
> +++ b/fs/ocfs2/stack_user.c
> @@ -9,6 +9,7 @@
>   
>   #include <linux/module.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/miscdevice.h>
>   #include <linux/mutex.h>
>   #include <linux/slab.h>
> diff --git a/fs/open.c b/fs/open.c
> index a81319b6177f..11a3202ea60c 100644
> --- a/fs/open.c
> +++ b/fs/open.c
> @@ -33,6 +33,7 @@
>   #include <linux/dnotify.h>
>   #include <linux/compat.h>
>   #include <linux/mnt_idmapping.h>
> +#include <linux/filelock.h>
>   
>   #include "internal.h"
>   
> diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
> index 732661aa2680..12ec31a9113b 100644
> --- a/fs/orangefs/file.c
> +++ b/fs/orangefs/file.c
> @@ -14,6 +14,7 @@
>   #include "orangefs-kernel.h"
>   #include "orangefs-bufmap.h"
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/pagemap.h>
>   
>   static int flush_racache(struct inode *inode)
> diff --git a/fs/proc/fd.c b/fs/proc/fd.c
> index 913bef0d2a36..2a1e7725dbcb 100644
> --- a/fs/proc/fd.c
> +++ b/fs/proc/fd.c
> @@ -11,6 +11,7 @@
>   #include <linux/file.h>
>   #include <linux/seq_file.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   
>   #include <linux/proc_fs.h>
>   
> diff --git a/fs/utimes.c b/fs/utimes.c
> index 39f356017635..00499e4ba955 100644
> --- a/fs/utimes.c
> +++ b/fs/utimes.c
> @@ -7,6 +7,7 @@
>   #include <linux/uaccess.h>
>   #include <linux/compat.h>
>   #include <asm/unistd.h>
> +#include <linux/filelock.h>
>   
>   static bool nsec_valid(long nsec)
>   {
> diff --git a/fs/xattr.c b/fs/xattr.c
> index 61107b6bbed2..b81fd7d8520e 100644
> --- a/fs/xattr.c
> +++ b/fs/xattr.c
> @@ -9,6 +9,7 @@
>     Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@xxxxxxxxxx>
>    */
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/slab.h>
>   #include <linux/file.h>
>   #include <linux/xattr.h>
> diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
> index 549c60942208..c1f283cc22f6 100644
> --- a/fs/xfs/xfs_buf.h
> +++ b/fs/xfs/xfs_buf.h
> @@ -11,6 +11,7 @@
>   #include <linux/spinlock.h>
>   #include <linux/mm.h>
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/dax.h>
>   #include <linux/uio.h>
>   #include <linux/list_lru.h>
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index e462d39c840e..591c696651f0 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -31,6 +31,7 @@
>   #include <linux/mman.h>
>   #include <linux/fadvise.h>
>   #include <linux/mount.h>
> +#include <linux/filelock.h>
>   
>   static const struct vm_operations_struct xfs_file_vm_ops;
>   
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index aa303be11576..257e279df469 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -4,6 +4,7 @@
>    * All Rights Reserved.
>    */
>   #include <linux/iversion.h>
> +#include <linux/filelock.h>
>   
>   #include "xfs.h"
>   #include "xfs_fs.h"
> diff --git a/include/linux/filelock.h b/include/linux/filelock.h
> new file mode 100644
> index 000000000000..b686e7e74787
> --- /dev/null
> +++ b/include/linux/filelock.h
> @@ -0,0 +1,428 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _LINUX_FILELOCK_H
> +#define _LINUX_FILELOCK_H
> +
> +#include <linux/list.h>
> +#include <linux/nfs_fs_i.h>
> +
> +#define FL_POSIX	1
> +#define FL_FLOCK	2
> +#define FL_DELEG	4	/* NFSv4 delegation */
> +#define FL_ACCESS	8	/* not trying to lock, just looking */
> +#define FL_EXISTS	16	/* when unlocking, test for existence */
> +#define FL_LEASE	32	/* lease held on this file */
> +#define FL_CLOSE	64	/* unlock on close */
> +#define FL_SLEEP	128	/* A blocking lock */
> +#define FL_DOWNGRADE_PENDING	256 /* Lease is being downgraded */
> +#define FL_UNLOCK_PENDING	512 /* Lease is being broken */
> +#define FL_OFDLCK	1024	/* lock is "owned" by struct file */
> +#define FL_LAYOUT	2048	/* outstanding pNFS layout */
> +#define FL_RECLAIM	4096	/* reclaiming from a reboot server */
> +
> +#define FL_CLOSE_POSIX (FL_POSIX | FL_CLOSE)
> +
> +/*
> + * Special return value from posix_lock_file() and vfs_lock_file() for
> + * asynchronous locking.
> + */
> +#define FILE_LOCK_DEFERRED 1
> +
> +struct file_lock;
> +
> +struct file_lock_operations {
> +	void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
> +	void (*fl_release_private)(struct file_lock *);
> +};
> +
> +struct lock_manager_operations {
> +	void *lm_mod_owner;
> +	fl_owner_t (*lm_get_owner)(fl_owner_t);
> +	void (*lm_put_owner)(fl_owner_t);
> +	void (*lm_notify)(struct file_lock *);	/* unblock callback */
> +	int (*lm_grant)(struct file_lock *, int);
> +	bool (*lm_break)(struct file_lock *);
> +	int (*lm_change)(struct file_lock *, int, struct list_head *);
> +	void (*lm_setup)(struct file_lock *, void **);
> +	bool (*lm_breaker_owns_lease)(struct file_lock *);
> +	bool (*lm_lock_expirable)(struct file_lock *cfl);
> +	void (*lm_expire_lock)(void);
> +};
> +
> +struct lock_manager {
> +	struct list_head list;
> +	/*
> +	 * NFSv4 and up also want opens blocked during the grace period;
> +	 * NLM doesn't care:
> +	 */
> +	bool block_opens;
> +};
> +
> +struct net;
> +void locks_start_grace(struct net *, struct lock_manager *);
> +void locks_end_grace(struct lock_manager *);
> +bool locks_in_grace(struct net *);
> +bool opens_in_grace(struct net *);
> +
> +
> +/*
> + * struct file_lock represents a generic "file lock". It's used to represent
> + * POSIX byte range locks, BSD (flock) locks, and leases. It's important to
> + * note that the same struct is used to represent both a request for a lock and
> + * the lock itself, but the same object is never used for both.
> + *
> + * FIXME: should we create a separate "struct lock_request" to help distinguish
> + * these two uses?
> + *
> + * The varous i_flctx lists are ordered by:
> + *
> + * 1) lock owner
> + * 2) lock range start
> + * 3) lock range end
> + *
> + * Obviously, the last two criteria only matter for POSIX locks.
> + */
> +struct file_lock {
> +	struct file_lock *fl_blocker;	/* The lock, that is blocking us */
> +	struct list_head fl_list;	/* link into file_lock_context */
> +	struct hlist_node fl_link;	/* node in global lists */
> +	struct list_head fl_blocked_requests;	/* list of requests with
> +						 * ->fl_blocker pointing here
> +						 */
> +	struct list_head fl_blocked_member;	/* node in
> +						 * ->fl_blocker->fl_blocked_requests
> +						 */
> +	fl_owner_t fl_owner;
> +	unsigned int fl_flags;
> +	unsigned char fl_type;
> +	unsigned int fl_pid;
> +	int fl_link_cpu;		/* what cpu's list is this on? */
> +	wait_queue_head_t fl_wait;
> +	struct file *fl_file;
> +	loff_t fl_start;
> +	loff_t fl_end;
> +
> +	struct fasync_struct *	fl_fasync; /* for lease break notifications */
> +	/* for lease breaks: */
> +	unsigned long fl_break_time;
> +	unsigned long fl_downgrade_time;
> +
> +	const struct file_lock_operations *fl_ops;	/* Callbacks for filesystems */
> +	const struct lock_manager_operations *fl_lmops;	/* Callbacks for lockmanagers */
> +	union {
> +		struct nfs_lock_info	nfs_fl;
> +		struct nfs4_lock_info	nfs4_fl;
> +		struct {
> +			struct list_head link;	/* link in AFS vnode's pending_locks list */
> +			int state;		/* state of grant or error if -ve */
> +			unsigned int	debug_id;
> +		} afs;
> +	} fl_u;
> +} __randomize_layout;
> +
> +struct file_lock_context {
> +	spinlock_t		flc_lock;
> +	struct list_head	flc_flock;
> +	struct list_head	flc_posix;
> +	struct list_head	flc_lease;
> +};
> +
> +#define locks_inode(f) file_inode(f)
> +
> +#ifdef CONFIG_FILE_LOCKING
> +extern int fcntl_getlk(struct file *, unsigned int, struct flock *);
> +extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
> +			struct flock *);
> +
> +#if BITS_PER_LONG == 32
> +extern int fcntl_getlk64(struct file *, unsigned int, struct flock64 *);
> +extern int fcntl_setlk64(unsigned int, struct file *, unsigned int,
> +			struct flock64 *);
> +#endif
> +
> +extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
> +extern int fcntl_getlease(struct file *filp);
> +
> +/* fs/locks.c */
> +void locks_free_lock_context(struct inode *inode);
> +void locks_free_lock(struct file_lock *fl);
> +extern void locks_init_lock(struct file_lock *);
> +extern struct file_lock * locks_alloc_lock(void);
> +extern void locks_copy_lock(struct file_lock *, struct file_lock *);
> +extern void locks_copy_conflock(struct file_lock *, struct file_lock *);
> +extern void locks_remove_posix(struct file *, fl_owner_t);
> +extern void locks_remove_file(struct file *);
> +extern void locks_release_private(struct file_lock *);
> +extern void posix_test_lock(struct file *, struct file_lock *);
> +extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
> +extern int locks_delete_block(struct file_lock *);
> +extern int vfs_test_lock(struct file *, struct file_lock *);
> +extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
> +extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
> +bool vfs_inode_has_locks(struct inode *inode);
> +extern int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
> +extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
> +extern void lease_get_mtime(struct inode *, struct timespec64 *time);
> +extern int generic_setlease(struct file *, long, struct file_lock **, void **priv);
> +extern int vfs_setlease(struct file *, long, struct file_lock **, void **);
> +extern int lease_modify(struct file_lock *, int, struct list_head *);
> +
> +struct notifier_block;
> +extern int lease_register_notifier(struct notifier_block *);
> +extern void lease_unregister_notifier(struct notifier_block *);
> +
> +struct files_struct;
> +extern void show_fd_locks(struct seq_file *f,
> +			 struct file *filp, struct files_struct *files);
> +extern bool locks_owner_has_blockers(struct file_lock_context *flctx,
> +			fl_owner_t owner);
> +
> +static inline struct file_lock_context *
> +locks_inode_context(const struct inode *inode)
> +{
> +	return smp_load_acquire(&inode->i_flctx);
> +}
> +
> +#else /* !CONFIG_FILE_LOCKING */
> +static inline int fcntl_getlk(struct file *file, unsigned int cmd,
> +			      struct flock __user *user)
> +{
> +	return -EINVAL;
> +}
> +
> +static inline int fcntl_setlk(unsigned int fd, struct file *file,
> +			      unsigned int cmd, struct flock __user *user)
> +{
> +	return -EACCES;
> +}
> +
> +#if BITS_PER_LONG == 32
> +static inline int fcntl_getlk64(struct file *file, unsigned int cmd,
> +				struct flock64 *user)
> +{
> +	return -EINVAL;
> +}
> +
> +static inline int fcntl_setlk64(unsigned int fd, struct file *file,
> +				unsigned int cmd, struct flock64 *user)
> +{
> +	return -EACCES;
> +}
> +#endif
> +static inline int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
> +{
> +	return -EINVAL;
> +}
> +
> +static inline int fcntl_getlease(struct file *filp)
> +{
> +	return F_UNLCK;
> +}
> +
> +static inline void
> +locks_free_lock_context(struct inode *inode)
> +{
> +}
> +
> +static inline void locks_init_lock(struct file_lock *fl)
> +{
> +	return;
> +}
> +
> +static inline void locks_copy_conflock(struct file_lock *new, struct file_lock *fl)
> +{
> +	return;
> +}
> +
> +static inline void locks_copy_lock(struct file_lock *new, struct file_lock *fl)
> +{
> +	return;
> +}
> +
> +static inline void locks_remove_posix(struct file *filp, fl_owner_t owner)
> +{
> +	return;
> +}
> +
> +static inline void locks_remove_file(struct file *filp)
> +{
> +	return;
> +}
> +
> +static inline void posix_test_lock(struct file *filp, struct file_lock *fl)
> +{
> +	return;
> +}
> +
> +static inline int posix_lock_file(struct file *filp, struct file_lock *fl,
> +				  struct file_lock *conflock)
> +{
> +	return -ENOLCK;
> +}
> +
> +static inline int locks_delete_block(struct file_lock *waiter)
> +{
> +	return -ENOENT;
> +}
> +
> +static inline int vfs_test_lock(struct file *filp, struct file_lock *fl)
> +{
> +	return 0;
> +}
> +
> +static inline int vfs_lock_file(struct file *filp, unsigned int cmd,
> +				struct file_lock *fl, struct file_lock *conf)
> +{
> +	return -ENOLCK;
> +}
> +
> +static inline int vfs_cancel_lock(struct file *filp, struct file_lock *fl)
> +{
> +	return 0;
> +}
> +
> +static inline int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl)
> +{
> +	return -ENOLCK;
> +}
> +
> +static inline int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
> +{
> +	return 0;
> +}
> +
> +static inline void lease_get_mtime(struct inode *inode,
> +				   struct timespec64 *time)
> +{
> +	return;
> +}
> +
> +static inline int generic_setlease(struct file *filp, long arg,
> +				    struct file_lock **flp, void **priv)
> +{
> +	return -EINVAL;
> +}
> +
> +static inline int vfs_setlease(struct file *filp, long arg,
> +			       struct file_lock **lease, void **priv)
> +{
> +	return -EINVAL;
> +}
> +
> +static inline int lease_modify(struct file_lock *fl, int arg,
> +			       struct list_head *dispose)
> +{
> +	return -EINVAL;
> +}
> +
> +struct files_struct;
> +static inline void show_fd_locks(struct seq_file *f,
> +			struct file *filp, struct files_struct *files) {}
> +static inline bool locks_owner_has_blockers(struct file_lock_context *flctx,
> +			fl_owner_t owner)
> +{
> +	return false;
> +}
> +
> +static inline struct file_lock_context *
> +locks_inode_context(const struct inode *inode)
> +{
> +	return NULL;
> +}
> +#endif /* !CONFIG_FILE_LOCKING */
> +
> +static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
> +{
> +	return locks_lock_inode_wait(locks_inode(filp), fl);
> +}
> +
> +#ifdef CONFIG_FILE_LOCKING
> +static inline int break_lease(struct inode *inode, unsigned int mode)
> +{
> +	/*
> +	 * Since this check is lockless, we must ensure that any refcounts
> +	 * taken are done before checking i_flctx->flc_lease. Otherwise, we
> +	 * could end up racing with tasks trying to set a new lease on this
> +	 * file.
> +	 */
> +	smp_mb();
> +	if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
> +		return __break_lease(inode, mode, FL_LEASE);
> +	return 0;
> +}
> +
> +static inline int break_deleg(struct inode *inode, unsigned int mode)
> +{
> +	/*
> +	 * Since this check is lockless, we must ensure that any refcounts
> +	 * taken are done before checking i_flctx->flc_lease. Otherwise, we
> +	 * could end up racing with tasks trying to set a new lease on this
> +	 * file.
> +	 */
> +	smp_mb();
> +	if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
> +		return __break_lease(inode, mode, FL_DELEG);
> +	return 0;
> +}
> +
> +static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
> +{
> +	int ret;
> +
> +	ret = break_deleg(inode, O_WRONLY|O_NONBLOCK);
> +	if (ret == -EWOULDBLOCK && delegated_inode) {
> +		*delegated_inode = inode;
> +		ihold(inode);
> +	}
> +	return ret;
> +}
> +
> +static inline int break_deleg_wait(struct inode **delegated_inode)
> +{
> +	int ret;
> +
> +	ret = break_deleg(*delegated_inode, O_WRONLY);
> +	iput(*delegated_inode);
> +	*delegated_inode = NULL;
> +	return ret;
> +}
> +
> +static inline int break_layout(struct inode *inode, bool wait)
> +{
> +	smp_mb();
> +	if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
> +		return __break_lease(inode,
> +				wait ? O_WRONLY : O_WRONLY | O_NONBLOCK,
> +				FL_LAYOUT);
> +	return 0;
> +}
> +
> +#else /* !CONFIG_FILE_LOCKING */
> +static inline int break_lease(struct inode *inode, unsigned int mode)
> +{
> +	return 0;
> +}
> +
> +static inline int break_deleg(struct inode *inode, unsigned int mode)
> +{
> +	return 0;
> +}
> +
> +static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
> +{
> +	return 0;
> +}
> +
> +static inline int break_deleg_wait(struct inode **delegated_inode)
> +{
> +	BUG();
> +	return 0;
> +}
> +
> +static inline int break_layout(struct inode *inode, bool wait)
> +{
> +	return 0;
> +}
> +
> +#endif /* CONFIG_FILE_LOCKING */
> +
> +#endif /* _LINUX_FILELOCK_H */
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 092673178e13..63f355058ab5 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -1003,132 +1003,11 @@ static inline struct file *get_file(struct file *f)
>   #define MAX_LFS_FILESIZE 	((loff_t)LLONG_MAX)
>   #endif
>   
> -#define FL_POSIX	1
> -#define FL_FLOCK	2
> -#define FL_DELEG	4	/* NFSv4 delegation */
> -#define FL_ACCESS	8	/* not trying to lock, just looking */
> -#define FL_EXISTS	16	/* when unlocking, test for existence */
> -#define FL_LEASE	32	/* lease held on this file */
> -#define FL_CLOSE	64	/* unlock on close */
> -#define FL_SLEEP	128	/* A blocking lock */
> -#define FL_DOWNGRADE_PENDING	256 /* Lease is being downgraded */
> -#define FL_UNLOCK_PENDING	512 /* Lease is being broken */
> -#define FL_OFDLCK	1024	/* lock is "owned" by struct file */
> -#define FL_LAYOUT	2048	/* outstanding pNFS layout */
> -#define FL_RECLAIM	4096	/* reclaiming from a reboot server */
> -
> -#define FL_CLOSE_POSIX (FL_POSIX | FL_CLOSE)
> -
> -/*
> - * Special return value from posix_lock_file() and vfs_lock_file() for
> - * asynchronous locking.
> - */
> -#define FILE_LOCK_DEFERRED 1
> -
>   /* legacy typedef, should eventually be removed */
>   typedef void *fl_owner_t;
>   
>   struct file_lock;
>   
> -struct file_lock_operations {
> -	void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
> -	void (*fl_release_private)(struct file_lock *);
> -};
> -
> -struct lock_manager_operations {
> -	void *lm_mod_owner;
> -	fl_owner_t (*lm_get_owner)(fl_owner_t);
> -	void (*lm_put_owner)(fl_owner_t);
> -	void (*lm_notify)(struct file_lock *);	/* unblock callback */
> -	int (*lm_grant)(struct file_lock *, int);
> -	bool (*lm_break)(struct file_lock *);
> -	int (*lm_change)(struct file_lock *, int, struct list_head *);
> -	void (*lm_setup)(struct file_lock *, void **);
> -	bool (*lm_breaker_owns_lease)(struct file_lock *);
> -	bool (*lm_lock_expirable)(struct file_lock *cfl);
> -	void (*lm_expire_lock)(void);
> -};
> -
> -struct lock_manager {
> -	struct list_head list;
> -	/*
> -	 * NFSv4 and up also want opens blocked during the grace period;
> -	 * NLM doesn't care:
> -	 */
> -	bool block_opens;
> -};
> -
> -struct net;
> -void locks_start_grace(struct net *, struct lock_manager *);
> -void locks_end_grace(struct lock_manager *);
> -bool locks_in_grace(struct net *);
> -bool opens_in_grace(struct net *);
> -
> -/* that will die - we need it for nfs_lock_info */
> -#include <linux/nfs_fs_i.h>
> -
> -/*
> - * struct file_lock represents a generic "file lock". It's used to represent
> - * POSIX byte range locks, BSD (flock) locks, and leases. It's important to
> - * note that the same struct is used to represent both a request for a lock and
> - * the lock itself, but the same object is never used for both.
> - *
> - * FIXME: should we create a separate "struct lock_request" to help distinguish
> - * these two uses?
> - *
> - * The varous i_flctx lists are ordered by:
> - *
> - * 1) lock owner
> - * 2) lock range start
> - * 3) lock range end
> - *
> - * Obviously, the last two criteria only matter for POSIX locks.
> - */
> -struct file_lock {
> -	struct file_lock *fl_blocker;	/* The lock, that is blocking us */
> -	struct list_head fl_list;	/* link into file_lock_context */
> -	struct hlist_node fl_link;	/* node in global lists */
> -	struct list_head fl_blocked_requests;	/* list of requests with
> -						 * ->fl_blocker pointing here
> -						 */
> -	struct list_head fl_blocked_member;	/* node in
> -						 * ->fl_blocker->fl_blocked_requests
> -						 */
> -	fl_owner_t fl_owner;
> -	unsigned int fl_flags;
> -	unsigned char fl_type;
> -	unsigned int fl_pid;
> -	int fl_link_cpu;		/* what cpu's list is this on? */
> -	wait_queue_head_t fl_wait;
> -	struct file *fl_file;
> -	loff_t fl_start;
> -	loff_t fl_end;
> -
> -	struct fasync_struct *	fl_fasync; /* for lease break notifications */
> -	/* for lease breaks: */
> -	unsigned long fl_break_time;
> -	unsigned long fl_downgrade_time;
> -
> -	const struct file_lock_operations *fl_ops;	/* Callbacks for filesystems */
> -	const struct lock_manager_operations *fl_lmops;	/* Callbacks for lockmanagers */
> -	union {
> -		struct nfs_lock_info	nfs_fl;
> -		struct nfs4_lock_info	nfs4_fl;
> -		struct {
> -			struct list_head link;	/* link in AFS vnode's pending_locks list */
> -			int state;		/* state of grant or error if -ve */
> -			unsigned int	debug_id;
> -		} afs;
> -	} fl_u;
> -} __randomize_layout;
> -
> -struct file_lock_context {
> -	spinlock_t		flc_lock;
> -	struct list_head	flc_flock;
> -	struct list_head	flc_posix;
> -	struct list_head	flc_lease;
> -};
> -
>   /* The following constant reflects the upper bound of the file/locking space */
>   #ifndef OFFSET_MAX
>   #define INT_LIMIT(x)	(~((x)1 << (sizeof(x)*8 - 1)))
> @@ -1138,211 +1017,6 @@ struct file_lock_context {
>   
>   extern void send_sigio(struct fown_struct *fown, int fd, int band);
>   
> -#define locks_inode(f) file_inode(f)
> -
> -#ifdef CONFIG_FILE_LOCKING
> -extern int fcntl_getlk(struct file *, unsigned int, struct flock *);
> -extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
> -			struct flock *);
> -
> -#if BITS_PER_LONG == 32
> -extern int fcntl_getlk64(struct file *, unsigned int, struct flock64 *);
> -extern int fcntl_setlk64(unsigned int, struct file *, unsigned int,
> -			struct flock64 *);
> -#endif
> -
> -extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
> -extern int fcntl_getlease(struct file *filp);
> -
> -/* fs/locks.c */
> -void locks_free_lock_context(struct inode *inode);
> -void locks_free_lock(struct file_lock *fl);
> -extern void locks_init_lock(struct file_lock *);
> -extern struct file_lock * locks_alloc_lock(void);
> -extern void locks_copy_lock(struct file_lock *, struct file_lock *);
> -extern void locks_copy_conflock(struct file_lock *, struct file_lock *);
> -extern void locks_remove_posix(struct file *, fl_owner_t);
> -extern void locks_remove_file(struct file *);
> -extern void locks_release_private(struct file_lock *);
> -extern void posix_test_lock(struct file *, struct file_lock *);
> -extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
> -extern int locks_delete_block(struct file_lock *);
> -extern int vfs_test_lock(struct file *, struct file_lock *);
> -extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
> -extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
> -bool vfs_inode_has_locks(struct inode *inode);
> -extern int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
> -extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
> -extern void lease_get_mtime(struct inode *, struct timespec64 *time);
> -extern int generic_setlease(struct file *, long, struct file_lock **, void **priv);
> -extern int vfs_setlease(struct file *, long, struct file_lock **, void **);
> -extern int lease_modify(struct file_lock *, int, struct list_head *);
> -
> -struct notifier_block;
> -extern int lease_register_notifier(struct notifier_block *);
> -extern void lease_unregister_notifier(struct notifier_block *);
> -
> -struct files_struct;
> -extern void show_fd_locks(struct seq_file *f,
> -			 struct file *filp, struct files_struct *files);
> -extern bool locks_owner_has_blockers(struct file_lock_context *flctx,
> -			fl_owner_t owner);
> -
> -static inline struct file_lock_context *
> -locks_inode_context(const struct inode *inode)
> -{
> -	return smp_load_acquire(&inode->i_flctx);
> -}
> -
> -#else /* !CONFIG_FILE_LOCKING */
> -static inline int fcntl_getlk(struct file *file, unsigned int cmd,
> -			      struct flock __user *user)
> -{
> -	return -EINVAL;
> -}
> -
> -static inline int fcntl_setlk(unsigned int fd, struct file *file,
> -			      unsigned int cmd, struct flock __user *user)
> -{
> -	return -EACCES;
> -}
> -
> -#if BITS_PER_LONG == 32
> -static inline int fcntl_getlk64(struct file *file, unsigned int cmd,
> -				struct flock64 *user)
> -{
> -	return -EINVAL;
> -}
> -
> -static inline int fcntl_setlk64(unsigned int fd, struct file *file,
> -				unsigned int cmd, struct flock64 *user)
> -{
> -	return -EACCES;
> -}
> -#endif
> -static inline int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
> -{
> -	return -EINVAL;
> -}
> -
> -static inline int fcntl_getlease(struct file *filp)
> -{
> -	return F_UNLCK;
> -}
> -
> -static inline void
> -locks_free_lock_context(struct inode *inode)
> -{
> -}
> -
> -static inline void locks_init_lock(struct file_lock *fl)
> -{
> -	return;
> -}
> -
> -static inline void locks_copy_conflock(struct file_lock *new, struct file_lock *fl)
> -{
> -	return;
> -}
> -
> -static inline void locks_copy_lock(struct file_lock *new, struct file_lock *fl)
> -{
> -	return;
> -}
> -
> -static inline void locks_remove_posix(struct file *filp, fl_owner_t owner)
> -{
> -	return;
> -}
> -
> -static inline void locks_remove_file(struct file *filp)
> -{
> -	return;
> -}
> -
> -static inline void posix_test_lock(struct file *filp, struct file_lock *fl)
> -{
> -	return;
> -}
> -
> -static inline int posix_lock_file(struct file *filp, struct file_lock *fl,
> -				  struct file_lock *conflock)
> -{
> -	return -ENOLCK;
> -}
> -
> -static inline int locks_delete_block(struct file_lock *waiter)
> -{
> -	return -ENOENT;
> -}
> -
> -static inline int vfs_test_lock(struct file *filp, struct file_lock *fl)
> -{
> -	return 0;
> -}
> -
> -static inline int vfs_lock_file(struct file *filp, unsigned int cmd,
> -				struct file_lock *fl, struct file_lock *conf)
> -{
> -	return -ENOLCK;
> -}
> -
> -static inline int vfs_cancel_lock(struct file *filp, struct file_lock *fl)
> -{
> -	return 0;
> -}
> -
> -static inline int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl)
> -{
> -	return -ENOLCK;
> -}
> -
> -static inline int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
> -{
> -	return 0;
> -}
> -
> -static inline void lease_get_mtime(struct inode *inode,
> -				   struct timespec64 *time)
> -{
> -	return;
> -}
> -
> -static inline int generic_setlease(struct file *filp, long arg,
> -				    struct file_lock **flp, void **priv)
> -{
> -	return -EINVAL;
> -}
> -
> -static inline int vfs_setlease(struct file *filp, long arg,
> -			       struct file_lock **lease, void **priv)
> -{
> -	return -EINVAL;
> -}
> -
> -static inline int lease_modify(struct file_lock *fl, int arg,
> -			       struct list_head *dispose)
> -{
> -	return -EINVAL;
> -}
> -
> -struct files_struct;
> -static inline void show_fd_locks(struct seq_file *f,
> -			struct file *filp, struct files_struct *files) {}
> -static inline bool locks_owner_has_blockers(struct file_lock_context *flctx,
> -			fl_owner_t owner)
> -{
> -	return false;
> -}
> -
> -static inline struct file_lock_context *
> -locks_inode_context(const struct inode *inode)
> -{
> -	return NULL;
> -}
> -
> -#endif /* !CONFIG_FILE_LOCKING */
> -
>   static inline struct inode *file_inode(const struct file *f)
>   {
>   	return f->f_inode;
> @@ -1353,11 +1027,6 @@ static inline struct dentry *file_dentry(const struct file *file)
>   	return d_real(file->f_path.dentry, file_inode(file));
>   }
>   
> -static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
> -{
> -	return locks_lock_inode_wait(locks_inode(filp), fl);
> -}
> -
>   struct fasync_struct {
>   	rwlock_t		fa_lock;
>   	int			magic;
> @@ -2641,96 +2310,6 @@ extern struct kobject *fs_kobj;
>   
>   #define MAX_RW_COUNT (INT_MAX & PAGE_MASK)
>   
> -#ifdef CONFIG_FILE_LOCKING
> -static inline int break_lease(struct inode *inode, unsigned int mode)
> -{
> -	/*
> -	 * Since this check is lockless, we must ensure that any refcounts
> -	 * taken are done before checking i_flctx->flc_lease. Otherwise, we
> -	 * could end up racing with tasks trying to set a new lease on this
> -	 * file.
> -	 */
> -	smp_mb();
> -	if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
> -		return __break_lease(inode, mode, FL_LEASE);
> -	return 0;
> -}
> -
> -static inline int break_deleg(struct inode *inode, unsigned int mode)
> -{
> -	/*
> -	 * Since this check is lockless, we must ensure that any refcounts
> -	 * taken are done before checking i_flctx->flc_lease. Otherwise, we
> -	 * could end up racing with tasks trying to set a new lease on this
> -	 * file.
> -	 */
> -	smp_mb();
> -	if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
> -		return __break_lease(inode, mode, FL_DELEG);
> -	return 0;
> -}
> -
> -static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
> -{
> -	int ret;
> -
> -	ret = break_deleg(inode, O_WRONLY|O_NONBLOCK);
> -	if (ret == -EWOULDBLOCK && delegated_inode) {
> -		*delegated_inode = inode;
> -		ihold(inode);
> -	}
> -	return ret;
> -}
> -
> -static inline int break_deleg_wait(struct inode **delegated_inode)
> -{
> -	int ret;
> -
> -	ret = break_deleg(*delegated_inode, O_WRONLY);
> -	iput(*delegated_inode);
> -	*delegated_inode = NULL;
> -	return ret;
> -}
> -
> -static inline int break_layout(struct inode *inode, bool wait)
> -{
> -	smp_mb();
> -	if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
> -		return __break_lease(inode,
> -				wait ? O_WRONLY : O_WRONLY | O_NONBLOCK,
> -				FL_LAYOUT);
> -	return 0;
> -}
> -
> -#else /* !CONFIG_FILE_LOCKING */
> -static inline int break_lease(struct inode *inode, unsigned int mode)
> -{
> -	return 0;
> -}
> -
> -static inline int break_deleg(struct inode *inode, unsigned int mode)
> -{
> -	return 0;
> -}
> -
> -static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
> -{
> -	return 0;
> -}
> -
> -static inline int break_deleg_wait(struct inode **delegated_inode)
> -{
> -	BUG();
> -	return 0;
> -}
> -
> -static inline int break_layout(struct inode *inode, bool wait)
> -{
> -	return 0;
> -}
> -
> -#endif /* CONFIG_FILE_LOCKING */
> -
>   /* fs/open.c */
>   struct audit_names;
>   struct filename {
> diff --git a/include/linux/lockd/xdr.h b/include/linux/lockd/xdr.h
> index 67e4a2c5500b..b60fbcd8cdfa 100644
> --- a/include/linux/lockd/xdr.h
> +++ b/include/linux/lockd/xdr.h
> @@ -11,6 +11,7 @@
>   #define LOCKD_XDR_H
>   
>   #include <linux/fs.h>
> +#include <linux/filelock.h>
>   #include <linux/nfs.h>
>   #include <linux/sunrpc/xdr.h>
>   

LGTM.

Reviewed-by: Xiubo Li <xiubli@xxxxxxxxxx>