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 "nfsfh.h"
10 #include "nfsd.h"
11
12 /*
13 * Flags for nfsd_permission
14 */
15 #define NFSD_MAY_NOP 0
16 #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */
17 #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
18 #define NFSD_MAY_READ 0x004 /* == MAY_READ */
19 #define NFSD_MAY_SATTR 0x008
20 #define NFSD_MAY_TRUNC 0x010
21 #define NFSD_MAY_LOCK 0x020
22 #define NFSD_MAY_MASK 0x03f
23
24 /* extra hints to permission and open routines: */
25 #define NFSD_MAY_OWNER_OVERRIDE 0x040
26 #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
27 #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
28 #define NFSD_MAY_NOT_BREAK_LEASE 0x200
29 #define NFSD_MAY_BYPASS_GSS 0x400
30 #define NFSD_MAY_READ_IF_EXEC 0x800
31
32 #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
33
34 #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
35 #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
36
37 struct nfsd_file;
38
39 /*
40 * Callback function for readdir
41 */
42 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
43
44 /* nfsd/vfs.c */
45 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
46 struct svc_export **expp);
47 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
48 const char *, unsigned int, struct svc_fh *);
49 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
50 const char *, unsigned int,
51 struct svc_export **, struct dentry **);
52 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
53 struct iattr *, int, time64_t);
54 int nfsd_mountpoint(struct dentry *, struct svc_export *);
55 #ifdef CONFIG_NFSD_V4
56 __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
57 struct xdr_netobj *);
58 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
59 struct file *, loff_t, loff_t, int);
60 __be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos,
61 struct nfsd_file *nf_dst, u64 dst_pos,
62 u64 count, bool sync);
63 #endif /* CONFIG_NFSD_V4 */
64 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
65 char *name, int len, struct iattr *attrs,
66 int type, dev_t rdev, struct svc_fh *res);
67 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
68 char *name, int len, struct iattr *attrs,
69 int type, dev_t rdev, struct svc_fh *res);
70 #ifdef CONFIG_NFSD_V3
71 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
72 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *,
73 char *name, int len, struct iattr *attrs,
74 struct svc_fh *res, int createmode,
75 u32 *verifier, bool *truncp, bool *created);
76 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
77 loff_t, unsigned long, __be32 *verf);
78 #endif /* CONFIG_NFSD_V3 */
79 #ifdef CONFIG_NFSD_V4
80 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
81 char *name, void **bufp, int *lenp);
82 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
83 char **bufp, int *lenp);
84 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
85 char *name);
86 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
87 char *name, void *buf, u32 len, u32 flags);
88 #endif
89 int nfsd_open_break_lease(struct inode *, int);
90 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
91 int, struct file **);
92 __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t,
93 int, struct file **);
94 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
95 struct file *file, loff_t offset,
96 unsigned long *count,
97 u32 *eof);
98 __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp,
99 struct file *file, loff_t offset,
100 struct kvec *vec, int vlen,
101 unsigned long *count,
102 u32 *eof);
103 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *,
104 loff_t, struct kvec *, int, unsigned long *,
105 u32 *eof);
106 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t,
107 struct kvec *, int, unsigned long *,
108 int stable, __be32 *verf);
109 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
110 struct nfsd_file *nf, loff_t offset,
111 struct kvec *vec, int vlen, unsigned long *cnt,
112 int stable, __be32 *verf);
113 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
114 char *, int *);
115 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
116 char *name, int len, char *path,
117 struct svc_fh *res);
118 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
119 char *, int, struct svc_fh *);
120 ssize_t nfsd_copy_file_range(struct file *, u64,
121 struct file *, u64, u64);
122 __be32 nfsd_rename(struct svc_rqst *,
123 struct svc_fh *, char *, int,
124 struct svc_fh *, char *, int);
125 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
126 char *name, int len);
127 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
128 loff_t *, struct readdir_cd *, nfsd_filldir_t);
129 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
130 struct kstatfs *, int access);
131
132 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
133 struct dentry *, int);
134
fh_want_write(struct svc_fh * fh)135 static inline int fh_want_write(struct svc_fh *fh)
136 {
137 int ret;
138
139 if (fh->fh_want_write)
140 return 0;
141 ret = mnt_want_write(fh->fh_export->ex_path.mnt);
142 if (!ret)
143 fh->fh_want_write = true;
144 return ret;
145 }
146
fh_drop_write(struct svc_fh * fh)147 static inline void fh_drop_write(struct svc_fh *fh)
148 {
149 if (fh->fh_want_write) {
150 fh->fh_want_write = false;
151 mnt_drop_write(fh->fh_export->ex_path.mnt);
152 }
153 }
154
fh_getattr(const struct svc_fh * fh,struct kstat * stat)155 static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat)
156 {
157 struct path p = {.mnt = fh->fh_export->ex_path.mnt,
158 .dentry = fh->fh_dentry};
159 return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS,
160 AT_STATX_SYNC_AS_STAT));
161 }
162
nfsd_create_is_exclusive(int createmode)163 static inline int nfsd_create_is_exclusive(int createmode)
164 {
165 return createmode == NFS3_CREATE_EXCLUSIVE
166 || createmode == NFS4_CREATE_EXCLUSIVE4_1;
167 }
168
169 #endif /* LINUX_NFSD_VFS_H */
170