Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0a3adade BF |
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 | ||
1557aca7 | 9 | #include "nfsfh.h" |
3dadecce | 10 | #include "nfsd.h" |
1557aca7 | 11 | |
0a3adade BF |
12 | /* |
13 | * Flags for nfsd_permission | |
14 | */ | |
8e82fa8f BF |
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 | |
aea93397 BF |
23 | |
24 | /* extra hints to permission and open routines: */ | |
8e82fa8f BF |
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 | |
0a3adade | 31 | |
06effdbb BS |
32 | #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */ |
33 | ||
0a3adade BF |
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 | /* | |
38 | * Callback function for readdir | |
39 | */ | |
ac7576f4 | 40 | typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); |
0a3adade BF |
41 | |
42 | /* nfsd/vfs.c */ | |
0a3adade BF |
43 | int nfsd_racache_init(int); |
44 | void nfsd_racache_shutdown(void); | |
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, time_t); | |
3227fa41 | 54 | int nfsd_mountpoint(struct dentry *, struct svc_export *); |
0a3adade | 55 | #ifdef CONFIG_NFSD_V4 |
18032ca0 DQ |
56 | __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *, |
57 | struct xdr_netobj *); | |
95d871f0 AS |
58 | __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, |
59 | struct file *, loff_t, loff_t, int); | |
ffa0160a CH |
60 | __be32 nfsd4_clone_file_range(struct file *, u64, struct file *, |
61 | u64, u64); | |
0a3adade | 62 | #endif /* CONFIG_NFSD_V4 */ |
b44061d0 BF |
63 | __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, |
64 | char *name, int len, struct iattr *attrs, | |
65 | int type, dev_t rdev, struct svc_fh *res); | |
0a3adade BF |
66 | __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, |
67 | char *name, int len, struct iattr *attrs, | |
68 | int type, dev_t rdev, struct svc_fh *res); | |
69 | #ifdef CONFIG_NFSD_V3 | |
70 | __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); | |
ac6721a1 | 71 | __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *, |
0a3adade BF |
72 | char *name, int len, struct iattr *attrs, |
73 | struct svc_fh *res, int createmode, | |
856121b2 | 74 | u32 *verifier, bool *truncp, bool *created); |
0a3adade BF |
75 | __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *, |
76 | loff_t, unsigned long); | |
77 | #endif /* CONFIG_NFSD_V3 */ | |
175a4eb7 | 78 | __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, |
0a3adade | 79 | int, struct file **); |
dc97618d | 80 | struct raparms; |
e2afc819 | 81 | __be32 nfsd_splice_read(struct svc_rqst *, |
dc97618d | 82 | struct file *, loff_t, unsigned long *); |
e2afc819 | 83 | __be32 nfsd_readv(struct file *, loff_t, struct kvec *, int, |
dc97618d | 84 | unsigned long *); |
039a87ca BF |
85 | __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, |
86 | loff_t, struct kvec *, int, unsigned long *); | |
52e380e0 KM |
87 | __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, |
88 | struct kvec *, int, unsigned long *, int); | |
af90f707 CH |
89 | __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, |
90 | struct file *file, loff_t offset, | |
91 | struct kvec *vec, int vlen, unsigned long *cnt, | |
54bbb7d2 | 92 | int stable); |
0a3adade BF |
93 | __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, |
94 | char *, int *); | |
95 | __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, | |
52ee0433 | 96 | char *name, int len, char *path, |
1e444f5b | 97 | struct svc_fh *res); |
0a3adade BF |
98 | __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, |
99 | char *, int, struct svc_fh *); | |
29ae7f9d AS |
100 | ssize_t nfsd_copy_file_range(struct file *, u64, |
101 | struct file *, u64, u64); | |
0a3adade BF |
102 | __be32 nfsd_rename(struct svc_rqst *, |
103 | struct svc_fh *, char *, int, | |
104 | struct svc_fh *, char *, int); | |
0a3adade BF |
105 | __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, |
106 | char *name, int len); | |
0a3adade | 107 | __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, |
ac7576f4 | 108 | loff_t *, struct readdir_cd *, nfsd_filldir_t); |
0a3adade BF |
109 | __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, |
110 | struct kstatfs *, int access); | |
111 | ||
0a3adade BF |
112 | __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, |
113 | struct dentry *, int); | |
0a3adade | 114 | |
e749a462 CH |
115 | struct raparms *nfsd_init_raparms(struct file *file); |
116 | void nfsd_put_raparams(struct file *file, struct raparms *ra); | |
117 | ||
bad0dcff AV |
118 | static inline int fh_want_write(struct svc_fh *fh) |
119 | { | |
4a55c101 JK |
120 | int ret = mnt_want_write(fh->fh_export->ex_path.mnt); |
121 | ||
122 | if (!ret) | |
aaf91ec1 | 123 | fh->fh_want_write = true; |
4a55c101 | 124 | return ret; |
bad0dcff AV |
125 | } |
126 | ||
127 | static inline void fh_drop_write(struct svc_fh *fh) | |
128 | { | |
4a55c101 | 129 | if (fh->fh_want_write) { |
aaf91ec1 | 130 | fh->fh_want_write = false; |
4a55c101 JK |
131 | mnt_drop_write(fh->fh_export->ex_path.mnt); |
132 | } | |
bad0dcff AV |
133 | } |
134 | ||
3dadecce AV |
135 | static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat) |
136 | { | |
137 | struct path p = {.mnt = fh->fh_export->ex_path.mnt, | |
138 | .dentry = fh->fh_dentry}; | |
a528d35e DH |
139 | return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS, |
140 | AT_STATX_SYNC_AS_STAT)); | |
3dadecce AV |
141 | } |
142 | ||
ead8fb8c KM |
143 | static inline int nfsd_create_is_exclusive(int createmode) |
144 | { | |
145 | return createmode == NFS3_CREATE_EXCLUSIVE | |
146 | || createmode == NFS4_CREATE_EXCLUSIVE4_1; | |
147 | } | |
148 | ||
ac503e4a BC |
149 | static inline bool nfsd_eof_on_read(long requested, long read, |
150 | loff_t offset, loff_t size) | |
151 | { | |
152 | /* We assume a short read means eof: */ | |
153 | if (requested > read) | |
154 | return true; | |
155 | /* | |
156 | * A non-short read might also reach end of file. The spec | |
157 | * still requires us to set eof in that case. | |
158 | * | |
159 | * Further operations may have modified the file size since | |
160 | * the read, so the following check is not atomic with the read. | |
161 | * We've only seen that cause a problem for a client in the case | |
162 | * where the read returned a count of 0 without setting eof. | |
163 | * That case was fixed by the addition of the above check. | |
164 | */ | |
165 | return (offset + read >= size); | |
166 | } | |
167 | ||
0a3adade | 168 | #endif /* LINUX_NFSD_VFS_H */ |