1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
4 */
5
6#ifndef LINUX_NFSD_VFS_H
7#define LINUX_NFSD_VFS_H
8
9#include <linux/fs.h>
10#include <linux/posix_acl.h>
11#include "nfsfh.h"
12#include "nfsd.h"
13
14/*
15 * Flags for nfsd_permission
16 */
17#define NFSD_MAY_NOP 0
18#define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */
19#define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
20#define NFSD_MAY_READ 0x004 /* == MAY_READ */
21#define NFSD_MAY_SATTR 0x008
22#define NFSD_MAY_TRUNC 0x010
23#define NFSD_MAY_NLM 0x020 /* request is from lockd */
24#define NFSD_MAY_MASK 0x03f
25
26/* extra hints to permission and open routines: */
27#define NFSD_MAY_OWNER_OVERRIDE 0x040
28#define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
29#define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
30#define NFSD_MAY_NOT_BREAK_LEASE 0x200
31#define NFSD_MAY_BYPASS_GSS 0x400
32#define NFSD_MAY_READ_IF_EXEC 0x800
33
34#define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
35
36#define NFSD_MAY_LOCALIO 0x2000 /* for tracing, reflects when localio used */
37
38#define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
39#define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
40
41struct nfsd_file;
42
43/*
44 * Callback function for readdir
45 */
46typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
47
48/* nfsd/vfs.c */
49struct nfsd_attrs {
50 struct iattr *na_iattr; /* input */
51 struct xdr_netobj *na_seclabel; /* input */
52 struct posix_acl *na_pacl; /* input */
53 struct posix_acl *na_dpacl; /* input */
54
55 int na_labelerr; /* output */
56 int na_aclerr; /* output */
57};
58
59static inline void nfsd_attrs_free(struct nfsd_attrs *attrs)
60{
61 posix_acl_release(acl: attrs->na_pacl);
62 posix_acl_release(acl: attrs->na_dpacl);
63}
64
65static inline bool nfsd_attrs_valid(struct nfsd_attrs *attrs)
66{
67 struct iattr *iap = attrs->na_iattr;
68
69 return (iap->ia_valid || (attrs->na_seclabel &&
70 attrs->na_seclabel->len) ||
71 attrs->na_pacl || attrs->na_dpacl);
72}
73
74__be32 nfserrno (int errno);
75int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
76 struct svc_export **expp);
77__be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
78 const char *, unsigned int, struct svc_fh *);
79__be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
80 const char *, unsigned int,
81 struct svc_export **, struct dentry **);
82__be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
83 struct nfsd_attrs *, const struct timespec64 *);
84int nfsd_mountpoint(struct dentry *, struct svc_export *);
85#ifdef CONFIG_NFSD_V4
86__be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
87 struct file *, loff_t, loff_t, int);
88__be32 nfsd4_clone_file_range(struct svc_rqst *rqstp,
89 struct nfsd_file *nf_src, u64 src_pos,
90 struct nfsd_file *nf_dst, u64 dst_pos,
91 u64 count, bool sync);
92#endif /* CONFIG_NFSD_V4 */
93__be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
94 struct nfsd_attrs *attrs, int type, dev_t rdev,
95 struct svc_fh *res);
96__be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
97 char *name, int len, struct nfsd_attrs *attrs,
98 int type, dev_t rdev, struct svc_fh *res);
99__be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
100__be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
101 struct svc_fh *resfhp, struct nfsd_attrs *iap);
102__be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp,
103 struct nfsd_file *nf, u64 offset, u32 count,
104 __be32 *verf);
105#ifdef CONFIG_NFSD_V4
106__be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
107 char *name, void **bufp, int *lenp);
108__be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
109 char **bufp, int *lenp);
110__be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
111 char *name);
112__be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
113 char *name, void *buf, u32 len, u32 flags);
114#endif
115int nfsd_open_break_lease(struct inode *, int);
116__be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
117 int, struct file **);
118int nfsd_open_verified(struct svc_fh *fhp, umode_t type, int may_flags,
119 struct file **filp);
120__be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
121 struct file *file, loff_t offset,
122 unsigned long *count,
123 u32 *eof);
124__be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
125 struct nfsd_file *nf, loff_t offset,
126 unsigned long *count, unsigned int base,
127 u32 *eof);
128bool nfsd_read_splice_ok(struct svc_rqst *rqstp);
129__be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
130 loff_t offset, unsigned long *count,
131 u32 *eof);
132__be32 nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
133 loff_t offset, const struct xdr_buf *payload,
134 unsigned long *cnt, int stable, __be32 *verf);
135__be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
136 struct nfsd_file *nf, loff_t offset,
137 const struct xdr_buf *payload,
138 unsigned long *cnt, int stable, __be32 *verf);
139__be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
140 char *, int *);
141__be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
142 char *name, int len, char *path,
143 struct nfsd_attrs *attrs,
144 struct svc_fh *res);
145__be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
146 char *, int, struct svc_fh *);
147ssize_t nfsd_copy_file_range(struct file *, u64,
148 struct file *, u64, u64);
149__be32 nfsd_rename(struct svc_rqst *,
150 struct svc_fh *, char *, int,
151 struct svc_fh *, char *, int);
152__be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
153 char *name, int len);
154__be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
155 loff_t *, struct readdir_cd *, nfsd_filldir_t);
156__be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
157 struct kstatfs *, int access);
158
159__be32 nfsd_permission(struct svc_cred *cred, struct svc_export *exp,
160 struct dentry *dentry, int acc);
161
162void nfsd_filp_close(struct file *fp);
163
164#endif /* LINUX_NFSD_VFS_H */
165

source code of linux/fs/nfsd/vfs.h