1 /*
2 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
3 */
4
5 #ifndef LINUX_NFSD_VFS_H
6 #define LINUX_NFSD_VFS_H
7
8 #include "nfsfh.h"
9 #include "nfsd.h"
10
11 /*
12 * Flags for nfsd_permission
13 */
14 #define NFSD_MAY_NOP 0
15 #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */
16 #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
17 #define NFSD_MAY_READ 0x004 /* == MAY_READ */
18 #define NFSD_MAY_SATTR 0x008
19 #define NFSD_MAY_TRUNC 0x010
20 #define NFSD_MAY_LOCK 0x020
21 #define NFSD_MAY_MASK 0x03f
22
23 /* extra hints to permission and open routines: */
24 #define NFSD_MAY_OWNER_OVERRIDE 0x040
25 #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
26 #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
27 #define NFSD_MAY_NOT_BREAK_LEASE 0x200
28 #define NFSD_MAY_BYPASS_GSS 0x400
29 #define NFSD_MAY_READ_IF_EXEC 0x800
30
31 #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
32
33 #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
34 #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
35
36 /*
37 * Callback function for readdir
38 */
39 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
40
41 /* nfsd/vfs.c */
42 int nfsd_racache_init(int);
43 void nfsd_racache_shutdown(void);
44 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
45 struct svc_export **expp);
46 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
47 const char *, unsigned int, struct svc_fh *);
48 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
49 const char *, unsigned int,
50 struct svc_export **, struct dentry **);
51 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
52 struct iattr *, int, time_t);
53 int nfsd_mountpoint(struct dentry *, struct svc_export *);
54 #ifdef CONFIG_NFSD_V4
55 __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
56 struct xdr_netobj *);
57 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
58 struct file *, loff_t, loff_t, int);
59 #endif /* CONFIG_NFSD_V4 */
60 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
61 char *name, int len, struct iattr *attrs,
62 int type, dev_t rdev, struct svc_fh *res);
63 #ifdef CONFIG_NFSD_V3
64 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
65 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *,
66 char *name, int len, struct iattr *attrs,
67 struct svc_fh *res, int createmode,
68 u32 *verifier, bool *truncp, bool *created);
69 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
70 loff_t, unsigned long);
71 #endif /* CONFIG_NFSD_V3 */
72 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
73 int, struct file **);
74 struct raparms;
75 __be32 nfsd_splice_read(struct svc_rqst *,
76 struct file *, loff_t, unsigned long *);
77 __be32 nfsd_readv(struct file *, loff_t, struct kvec *, int,
78 unsigned long *);
79 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *,
80 loff_t, struct kvec *, int, unsigned long *);
81 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
82 loff_t, struct kvec *,int, unsigned long *, int *);
83 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
84 struct file *file, loff_t offset,
85 struct kvec *vec, int vlen, unsigned long *cnt,
86 int *stablep);
87 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
88 char *, int *);
89 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
90 char *name, int len, char *path,
91 struct svc_fh *res);
92 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
93 char *, int, struct svc_fh *);
94 __be32 nfsd_rename(struct svc_rqst *,
95 struct svc_fh *, char *, int,
96 struct svc_fh *, char *, int);
97 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
98 char *name, int len);
99 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
100 loff_t *, struct readdir_cd *, nfsd_filldir_t);
101 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
102 struct kstatfs *, int access);
103
104 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
105 struct dentry *, int);
106
107 struct raparms *nfsd_init_raparms(struct file *file);
108 void nfsd_put_raparams(struct file *file, struct raparms *ra);
109
fh_want_write(struct svc_fh * fh)110 static inline int fh_want_write(struct svc_fh *fh)
111 {
112 int ret;
113
114 if (fh->fh_want_write)
115 return 0;
116 ret = mnt_want_write(fh->fh_export->ex_path.mnt);
117 if (!ret)
118 fh->fh_want_write = true;
119 return ret;
120 }
121
fh_drop_write(struct svc_fh * fh)122 static inline void fh_drop_write(struct svc_fh *fh)
123 {
124 if (fh->fh_want_write) {
125 fh->fh_want_write = false;
126 mnt_drop_write(fh->fh_export->ex_path.mnt);
127 }
128 }
129
fh_getattr(struct svc_fh * fh,struct kstat * stat)130 static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
131 {
132 struct path p = {.mnt = fh->fh_export->ex_path.mnt,
133 .dentry = fh->fh_dentry};
134 return nfserrno(vfs_getattr(&p, stat));
135 }
136
nfsd_create_is_exclusive(int createmode)137 static inline int nfsd_create_is_exclusive(int createmode)
138 {
139 return createmode == NFS3_CREATE_EXCLUSIVE
140 || createmode == NFS4_CREATE_EXCLUSIVE4_1;
141 }
142
143 #endif /* LINUX_NFSD_VFS_H */
144