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 #define READ_PLUS_SCRATCH_SIZE (16)
17
18 /* nfs4.2proc.c */
19 #ifdef CONFIG_NFS_V4_2
20 int nfs42_proc_allocate(struct file *, loff_t, loff_t);
21 ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t,
22 struct nl4_server *, nfs4_stateid *, bool);
23 int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
24 loff_t nfs42_proc_llseek(struct file *, loff_t, int);
25 int nfs42_proc_layoutstats_generic(struct nfs_server *,
26 struct nfs42_layoutstat_data *);
27 int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
28 int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
29 const struct nfs42_layout_error *errors,
30 size_t n);
31 int nfs42_proc_copy_notify(struct file *, struct file *,
32 struct nfs42_copy_notify_res *);
33 static inline bool nfs42_files_from_same_server(struct file *in,
34 struct file *out)
35 {
36 struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client;
37 struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client;
38
39 return nfs4_check_serverowner_major_id(c_in->cl_serverowner,
40 c_out->cl_serverowner);
41 }
42
43 ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
44 void *buf, size_t buflen);
45 int nfs42_proc_setxattr(struct inode *inode, const char *name,
46 const void *buf, size_t buflen, int flags);
47 ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
48 size_t buflen, u64 *cookiep, bool *eofp);
49 int nfs42_proc_removexattr(struct inode *inode, const char *name);
50
51 /*
52 * Maximum XDR buffer size needed for a listxattr buffer of buflen size.
53 *
54 * The upper boundary is a buffer with all 1-byte sized attribute names.
55 * They would be 7 bytes long in the eventual buffer ("user.x\0"), and
56 * 8 bytes long XDR-encoded.
57 *
58 * Include the trailing eof word as well and make the result a multiple
59 * of 4 bytes.
60 */
61 static inline u32 nfs42_listxattr_xdrsize(u32 buflen)
62 {
63 u32 size = 8 * buflen / (XATTR_USER_PREFIX_LEN + 2) + 4;
64
65 return (size + 3) & ~3;
66 }
67 #endif /* CONFIG_NFS_V4_2 */
68 #endif /* __LINUX_FS_NFS_NFS4_2_H */
69
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