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 */
39typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
40
41/* nfsd/vfs.c */
42int		nfsd_racache_init(int);
43void		nfsd_racache_shutdown(void);
44int		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);
53int 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 **);
74struct 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
107struct raparms *nfsd_init_raparms(struct file *file);
108void		nfsd_put_raparams(struct file *file, struct raparms *ra);
109
110static inline int fh_want_write(struct svc_fh *fh)
111{
112	int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
113
114	if (!ret)
115		fh->fh_want_write = true;
116	return ret;
117}
118
119static inline void fh_drop_write(struct svc_fh *fh)
120{
121	if (fh->fh_want_write) {
122		fh->fh_want_write = false;
123		mnt_drop_write(fh->fh_export->ex_path.mnt);
124	}
125}
126
127static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
128{
129	struct path p = {.mnt = fh->fh_export->ex_path.mnt,
130			 .dentry = fh->fh_dentry};
131	return nfserrno(vfs_getattr(&p, stat));
132}
133
134static inline int nfsd_create_is_exclusive(int createmode)
135{
136	return createmode == NFS3_CREATE_EXCLUSIVE
137	       || createmode == NFS4_CREATE_EXCLUSIVE4_1;
138}
139
140#endif /* LINUX_NFSD_VFS_H */
141