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
41 struct nfsd_file;
42
43 /*
44 * Callback function for readdir
45 */
46 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
47
48 /* nfsd/vfs.c */
49 struct 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_dpaclerr; /* output */
57 int na_paclerr; /* output */
58 };
59
nfsd_attrs_free(struct nfsd_attrs * attrs)60 static inline void nfsd_attrs_free(struct nfsd_attrs *attrs)
61 {
62 posix_acl_release(attrs->na_pacl);
63 posix_acl_release(attrs->na_dpacl);
64 }
65
nfsd_attrs_valid(struct nfsd_attrs * attrs)66 static inline bool nfsd_attrs_valid(struct nfsd_attrs *attrs)
67 {
68 struct iattr *iap = attrs->na_iattr;
69
70 return (iap->ia_valid || (attrs->na_seclabel &&
71 attrs->na_seclabel->len) ||
72 attrs->na_pacl || attrs->na_dpacl);
73 }
74
75 __be32 nfserrno (int errno);
76 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
77 struct svc_export **expp);
78 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
79 const char *, unsigned int, struct svc_fh *);
80 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
81 const char *, unsigned int,
82 struct svc_export **, struct dentry **);
83 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
84 struct nfsd_attrs *, const struct timespec64 *);
85 int nfsd_mountpoint(struct dentry *, struct svc_export *);
86 #ifdef CONFIG_NFSD_V4
87 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
88 struct file *, loff_t, loff_t, int);
89 __be32 nfsd4_clone_file_range(struct svc_rqst *rqstp,
90 struct nfsd_file *nf_src, u64 src_pos,
91 struct nfsd_file *nf_dst, u64 dst_pos,
92 u64 count, bool sync);
93 #endif /* CONFIG_NFSD_V4 */
94 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
95 struct nfsd_attrs *attrs, int type, dev_t rdev,
96 struct svc_fh *res);
97 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
98 char *name, int len, struct nfsd_attrs *attrs,
99 int type, dev_t rdev, struct svc_fh *res);
100 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
101 __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
102 struct svc_fh *resfhp, struct nfsd_attrs *iap);
103 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp,
104 struct nfsd_file *nf, u64 offset, u32 count,
105 __be32 *verf);
106 #ifdef CONFIG_NFSD_V4
107 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
108 char *name, void **bufp, int *lenp);
109 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
110 char **bufp, int *lenp);
111 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
112 char *name);
113 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
114 char *name, void *buf, u32 len, u32 flags);
115 #endif
116 int nfsd_open_break_lease(struct inode *, int);
117 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
118 int, struct file **);
119 int nfsd_open_verified(struct svc_fh *fhp, umode_t type, int may_flags,
120 struct file **filp);
121 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
122 struct file *file, loff_t offset,
123 unsigned long *count,
124 u32 *eof);
125 __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
126 struct nfsd_file *nf, loff_t offset,
127 unsigned long *count, unsigned int base,
128 u32 *eof);
129 bool nfsd_read_splice_ok(struct svc_rqst *rqstp);
130 __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
131 loff_t offset, unsigned long *count,
132 u32 *eof);
133 __be32 nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
134 loff_t offset, const struct xdr_buf *payload,
135 unsigned long *cnt, int stable, __be32 *verf);
136 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
137 struct nfsd_file *nf, loff_t offset,
138 const struct xdr_buf *payload,
139 unsigned long *cnt, int stable, __be32 *verf);
140 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
141 char *, int *);
142 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
143 char *name, int len, char *path,
144 struct nfsd_attrs *attrs,
145 struct svc_fh *res);
146 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
147 char *, int, struct svc_fh *);
148 ssize_t nfsd_copy_file_range(struct file *, u64,
149 struct file *, u64, u64);
150 __be32 nfsd_rename(struct svc_rqst *,
151 struct svc_fh *, char *, int,
152 struct svc_fh *, char *, int);
153 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
154 char *name, int len);
155 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
156 loff_t *, struct readdir_cd *, nfsd_filldir_t);
157 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
158 struct kstatfs *, int access);
159
160 __be32 nfsd_permission(struct svc_cred *cred, struct svc_export *exp,
161 struct dentry *dentry, int acc);
162
163 void nfsd_filp_close(struct file *fp);
164
165 #endif /* LINUX_NFSD_VFS_H */
166