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 | |
57 | static inline void nfsd_attrs_free(struct nfsd_attrs *attrs) |
58 | { |
59 | posix_acl_release(acl: attrs->na_pacl); |
60 | posix_acl_release(acl: 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 | int nfsd_open_verified(struct svc_rqst *rqstp, struct svc_fh *fhp, |
108 | int may_flags, struct file **filp); |
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 | |
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(mnt: fh->fh_export->ex_path.mnt); |
157 | if (!ret) |
158 | fh->fh_want_write = true; |
159 | return ret; |
160 | } |
161 | |
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(mnt: fh->fh_export->ex_path.mnt); |
167 | } |
168 | } |
169 | |
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(errno: vfs_getattr(&p, stat, request_mask, |
180 | AT_STATX_SYNC_AS_STAT)); |
181 | } |
182 | |
183 | #endif /* LINUX_NFSD_VFS_H */ |
184 | |