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vfs.h
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1 /*
2  * Copyright (C) 1995-1997 Olaf Kirch <[email protected]>
3  */
4 
5 #ifndef LINUX_NFSD_VFS_H
6 #define LINUX_NFSD_VFS_H
7 
8 #include "nfsfh.h"
9 
10 /*
11  * Flags for nfsd_permission
12  */
13 #define NFSD_MAY_NOP 0
14 #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */
15 #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
16 #define NFSD_MAY_READ 0x004 /* == MAY_READ */
17 #define NFSD_MAY_SATTR 0x008
18 #define NFSD_MAY_TRUNC 0x010
19 #define NFSD_MAY_LOCK 0x020
20 #define NFSD_MAY_MASK 0x03f
21 
22 /* extra hints to permission and open routines: */
23 #define NFSD_MAY_OWNER_OVERRIDE 0x040
24 #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
25 #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
26 #define NFSD_MAY_NOT_BREAK_LEASE 0x200
27 #define NFSD_MAY_BYPASS_GSS 0x400
28 #define NFSD_MAY_READ_IF_EXEC 0x800
29 
30 #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
31 
32 #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
33 #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
34 
35 /*
36  * Callback function for readdir
37  */
38 typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
39 
40 /* nfsd/vfs.c */
41 int fh_lock_parent(struct svc_fh *, struct dentry *);
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_acl(struct svc_rqst *, struct svc_fh *,
56  struct nfs4_acl *);
57 int nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **);
58 #endif /* CONFIG_NFSD_V4 */
59 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
60  char *name, int len, struct iattr *attrs,
61  int type, dev_t rdev, struct svc_fh *res);
62 #ifdef CONFIG_NFSD_V3
63 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
64 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *,
65  char *name, int len, struct iattr *attrs,
66  struct svc_fh *res, int createmode,
67  u32 *verifier, bool *truncp, bool *created);
68 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
69  loff_t, unsigned long);
70 #endif /* CONFIG_NFSD_V3 */
71 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
72  int, struct file **);
73 void nfsd_close(struct file *);
74 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *,
75  loff_t, struct kvec *, int, unsigned long *);
76 __be32 nfsd_read_file(struct svc_rqst *, struct svc_fh *, struct file *,
77  loff_t, struct kvec *, int, unsigned long *);
78 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
79  loff_t, struct kvec *,int, unsigned long *, int *);
80 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
81  char *, int *);
82 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
83  char *name, int len, char *path, int plen,
84  struct svc_fh *res, struct iattr *);
85 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
86  char *, int, struct svc_fh *);
87 __be32 nfsd_rename(struct svc_rqst *,
88  struct svc_fh *, char *, int,
89  struct svc_fh *, char *, int);
90 __be32 nfsd_remove(struct svc_rqst *,
91  struct svc_fh *, char *, int);
92 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
93  char *name, int len);
94 int nfsd_truncate(struct svc_rqst *, struct svc_fh *,
95  unsigned long size);
96 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
97  loff_t *, struct readdir_cd *, filldir_t);
98 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
99  struct kstatfs *, int access);
100 
101 int nfsd_notify_change(struct inode *, struct iattr *);
102 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
103  struct dentry *, int);
104 int nfsd_sync_dir(struct dentry *dp);
105 
106 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
107 struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
108 int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
109 #endif
110 
111 static inline int fh_want_write(struct svc_fh *fh)
112 {
113  int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
114 
115  if (!ret)
116  fh->fh_want_write = 1;
117  return ret;
118 }
119 
120 static inline void fh_drop_write(struct svc_fh *fh)
121 {
122  if (fh->fh_want_write) {
123  fh->fh_want_write = 0;
124  mnt_drop_write(fh->fh_export->ex_path.mnt);
125  }
126 }
127 
128 #endif /* LINUX_NFSD_VFS_H */
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