2 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
5 #ifndef LINUX_NFSD_VFS_H
6 #define LINUX_NFSD_VFS_H
12 * Flags for nfsd_permission
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
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
31 #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
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)
37 * Callback function for readdir
39 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
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 *);
55 __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
57 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
58 struct file *, loff_t, loff_t, int);
59 __be32 nfsd4_clone_file_range(struct file *, u64, struct file *,
61 #endif /* CONFIG_NFSD_V4 */
62 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
63 char *name, int len, struct iattr *attrs,
64 int type, dev_t rdev, struct svc_fh *res);
65 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
66 char *name, int len, struct iattr *attrs,
67 int type, dev_t rdev, struct svc_fh *res);
69 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
70 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *,
71 char *name, int len, struct iattr *attrs,
72 struct svc_fh *res, int createmode,
73 u32 *verifier, bool *truncp, bool *created);
74 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
75 loff_t, unsigned long);
76 #endif /* CONFIG_NFSD_V3 */
77 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
80 __be32 nfsd_splice_read(struct svc_rqst *,
81 struct file *, loff_t, unsigned long *);
82 __be32 nfsd_readv(struct file *, loff_t, struct kvec *, int,
84 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *,
85 loff_t, struct kvec *, int, unsigned long *);
86 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t,
87 struct kvec *, int, unsigned long *, int);
88 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
89 struct file *file, loff_t offset,
90 struct kvec *vec, int vlen, unsigned long *cnt,
92 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
94 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
95 char *name, int len, char *path,
97 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
98 char *, int, struct svc_fh *);
99 ssize_t nfsd_copy_file_range(struct file *, u64,
100 struct file *, u64, u64);
101 __be32 nfsd_rename(struct svc_rqst *,
102 struct svc_fh *, char *, int,
103 struct svc_fh *, char *, int);
104 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
105 char *name, int len);
106 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
107 loff_t *, struct readdir_cd *, nfsd_filldir_t);
108 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
109 struct kstatfs *, int access);
111 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
112 struct dentry *, int);
114 struct raparms *nfsd_init_raparms(struct file *file);
115 void nfsd_put_raparams(struct file *file, struct raparms *ra);
117 static inline int fh_want_write(struct svc_fh *fh)
119 int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
122 fh->fh_want_write = true;
126 static inline void fh_drop_write(struct svc_fh *fh)
128 if (fh->fh_want_write) {
129 fh->fh_want_write = false;
130 mnt_drop_write(fh->fh_export->ex_path.mnt);
134 static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
136 struct path p = {.mnt = fh->fh_export->ex_path.mnt,
137 .dentry = fh->fh_dentry};
138 return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS,
139 AT_STATX_SYNC_AS_STAT));
142 static inline int nfsd_create_is_exclusive(int createmode)
144 return createmode == NFS3_CREATE_EXCLUSIVE
145 || createmode == NFS4_CREATE_EXCLUSIVE4_1;
148 static inline bool nfsd_eof_on_read(long requested, long read,
149 loff_t offset, loff_t size)
151 /* We assume a short read means eof: */
152 if (requested > read)
155 * A non-short read might also reach end of file. The spec
156 * still requires us to set eof in that case.
158 * Further operations may have modified the file size since
159 * the read, so the following check is not atomic with the read.
160 * We've only seen that cause a problem for a client in the case
161 * where the read returned a count of 0 without setting eof.
162 * That case was fixed by the addition of the above check.
164 return (offset + read >= size);
167 #endif /* LINUX_NFSD_VFS_H */