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_LOCK 0x020
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_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
37 #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
38
39 struct nfsd_file;
40
41 /*
42 * Callback function for readdir
43 */
44 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
45
46 /* nfsd/vfs.c */
47 struct nfsd_attrs {
48 struct iattr *na_iattr; /* input */
49 struct xdr_netobj *na_seclabel; /* input */
50 struct posix_acl *na_pacl; /* input */
51 struct posix_acl *na_dpacl; /* input */
52
53 int na_labelerr; /* output */
54 int na_aclerr; /* output */
55 };
56
nfsd_attrs_free(struct nfsd_attrs * attrs)57 static inline void nfsd_attrs_free(struct nfsd_attrs *attrs)
58 {
59 posix_acl_release(attrs->na_pacl);
60 posix_acl_release(attrs->na_dpacl);
61 }
62
63 __be32 nfserrno (int errno);
64 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
65 struct svc_export **expp);
66 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
67 const char *, unsigned int, struct svc_fh *);
68 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
69 const char *, unsigned int,
70 struct svc_export **, struct dentry **);
71 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
72 struct nfsd_attrs *, int, time64_t);
73 int nfsd_mountpoint(struct dentry *, struct svc_export *);
74 #ifdef CONFIG_NFSD_V4
75 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
76 struct file *, loff_t, loff_t, int);
77 __be32 nfsd4_clone_file_range(struct svc_rqst *rqstp,
78 struct nfsd_file *nf_src, u64 src_pos,
79 struct nfsd_file *nf_dst, u64 dst_pos,
80 u64 count, bool sync);
81 #endif /* CONFIG_NFSD_V4 */
82 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
83 struct nfsd_attrs *attrs, int type, dev_t rdev,
84 struct svc_fh *res);
85 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
86 char *name, int len, struct nfsd_attrs *attrs,
87 int type, dev_t rdev, struct svc_fh *res);
88 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
89 __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
90 struct svc_fh *resfhp, struct nfsd_attrs *iap);
91 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp,
92 struct nfsd_file *nf, u64 offset, u32 count,
93 __be32 *verf);
94 #ifdef CONFIG_NFSD_V4
95 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
96 char *name, void **bufp, int *lenp);
97 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
98 char **bufp, int *lenp);
99 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
100 char *name);
101 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
102 char *name, void *buf, u32 len, u32 flags);
103 #endif
104 int nfsd_open_break_lease(struct inode *, int);
105 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
106 int, struct file **);
107 __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *,
108 int, struct file **);
109 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
110 struct file *file, loff_t offset,
111 unsigned long *count,
112 u32 *eof);
113 __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
114 struct file *file, loff_t offset,
115 unsigned long *count, unsigned int base,
116 u32 *eof);
117 __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
118 loff_t offset, unsigned long *count,
119 u32 *eof);
120 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t,
121 struct kvec *, int, unsigned long *,
122 int stable, __be32 *verf);
123 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
124 struct nfsd_file *nf, loff_t offset,
125 struct kvec *vec, int vlen, unsigned long *cnt,
126 int stable, __be32 *verf);
127 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
128 char *, int *);
129 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
130 char *name, int len, char *path,
131 struct nfsd_attrs *attrs,
132 struct svc_fh *res);
133 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
134 char *, int, struct svc_fh *);
135 ssize_t nfsd_copy_file_range(struct file *, u64,
136 struct file *, u64, u64);
137 __be32 nfsd_rename(struct svc_rqst *,
138 struct svc_fh *, char *, int,
139 struct svc_fh *, char *, int);
140 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
141 char *name, int len);
142 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
143 loff_t *, struct readdir_cd *, nfsd_filldir_t);
144 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
145 struct kstatfs *, int access);
146
147 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
148 struct dentry *, int);
149
fh_want_write(struct svc_fh * fh)150 static inline int fh_want_write(struct svc_fh *fh)
151 {
152 int ret;
153
154 if (fh->fh_want_write)
155 return 0;
156 ret = mnt_want_write(fh->fh_export->ex_path.mnt);
157 if (!ret)
158 fh->fh_want_write = true;
159 return ret;
160 }
161
fh_drop_write(struct svc_fh * fh)162 static inline void fh_drop_write(struct svc_fh *fh)
163 {
164 if (fh->fh_want_write) {
165 fh->fh_want_write = false;
166 mnt_drop_write(fh->fh_export->ex_path.mnt);
167 }
168 }
169
fh_getattr(const struct svc_fh * fh,struct kstat * stat)170 static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat)
171 {
172 u32 request_mask = STATX_BASIC_STATS;
173 struct path p = {.mnt = fh->fh_export->ex_path.mnt,
174 .dentry = fh->fh_dentry};
175
176 if (fh->fh_maxsize == NFS4_FHSIZE)
177 request_mask |= (STATX_BTIME | STATX_CHANGE_COOKIE);
178
179 return nfserrno(vfs_getattr(&p, stat, request_mask,
180 AT_STATX_SYNC_AS_STAT));
181 }
182
183 #endif /* LINUX_NFSD_VFS_H */
184
