1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
 4 */
 5
 6#ifndef __LINUX_FS_NFS_NFS4_2_H
 7#define __LINUX_FS_NFS_NFS4_2_H
 8
 9#include <linux/xattr.h>
10
11/*
12 * FIXME:  four LAYOUTSTATS calls per compound at most! Do we need to support
13 * more? Need to consider not to pre-alloc too much for a compound.
14 */
15#define PNFS_LAYOUTSTATS_MAXDEV (4)
16
17/* nfs4.2proc.c */
18#ifdef CONFIG_NFS_V4_2
19int nfs42_proc_allocate(struct file *, loff_t, loff_t);
20ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t,
21			struct nl4_server *, nfs4_stateid *, bool);
22int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
23loff_t nfs42_proc_llseek(struct file *, loff_t, int);
24int nfs42_proc_layoutstats_generic(struct nfs_server *,
25				   struct nfs42_layoutstat_data *);
26int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
27int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
28			   const struct nfs42_layout_error *errors,
29			   size_t n);
30int nfs42_proc_copy_notify(struct file *, struct file *,
31			   struct nfs42_copy_notify_res *);
32static inline bool nfs42_files_from_same_server(struct file *in,
33						struct file *out)
34{
35	struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client;
36	struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client;
37
38	return nfs4_check_serverowner_major_id(c_in->cl_serverowner,
39					       c_out->cl_serverowner);
40}
41
42ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
43			    void *buf, size_t buflen);
44int nfs42_proc_setxattr(struct inode *inode, const char *name,
45			const void *buf, size_t buflen, int flags);
46ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
47			       size_t buflen, u64 *cookiep, bool *eofp);
48int nfs42_proc_removexattr(struct inode *inode, const char *name);
49
50/*
51 * Maximum XDR buffer size needed for a listxattr buffer of buflen size.
52 *
53 * The upper boundary is a buffer with all 1-byte sized attribute names.
54 * They would be 7 bytes long in the eventual buffer ("user.x\0"), and
55 * 8 bytes long XDR-encoded.
56 *
57 * Include the trailing eof word as well.
58 */
59static inline u32 nfs42_listxattr_xdrsize(u32 buflen)
60{
61	return ((buflen / (XATTR_USER_PREFIX_LEN + 2)) * 8) + 4;
62}
63#endif /* CONFIG_NFS_V4_2 */
64#endif /* __LINUX_FS_NFS_NFS4_2_H */