1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #ifndef LINUX_NFSD_VFS_H
7*4882a593Smuzhiyun #define LINUX_NFSD_VFS_H
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include "nfsfh.h"
10*4882a593Smuzhiyun #include "nfsd.h"
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun * Flags for nfsd_permission
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun #define NFSD_MAY_NOP 0
16*4882a593Smuzhiyun #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */
17*4882a593Smuzhiyun #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
18*4882a593Smuzhiyun #define NFSD_MAY_READ 0x004 /* == MAY_READ */
19*4882a593Smuzhiyun #define NFSD_MAY_SATTR 0x008
20*4882a593Smuzhiyun #define NFSD_MAY_TRUNC 0x010
21*4882a593Smuzhiyun #define NFSD_MAY_LOCK 0x020
22*4882a593Smuzhiyun #define NFSD_MAY_MASK 0x03f
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun /* extra hints to permission and open routines: */
25*4882a593Smuzhiyun #define NFSD_MAY_OWNER_OVERRIDE 0x040
26*4882a593Smuzhiyun #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
27*4882a593Smuzhiyun #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
28*4882a593Smuzhiyun #define NFSD_MAY_NOT_BREAK_LEASE 0x200
29*4882a593Smuzhiyun #define NFSD_MAY_BYPASS_GSS 0x400
30*4882a593Smuzhiyun #define NFSD_MAY_READ_IF_EXEC 0x800
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
35*4882a593Smuzhiyun #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun struct nfsd_file;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun /*
40*4882a593Smuzhiyun * Callback function for readdir
41*4882a593Smuzhiyun */
42*4882a593Smuzhiyun typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /* nfsd/vfs.c */
45*4882a593Smuzhiyun int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
46*4882a593Smuzhiyun struct svc_export **expp);
47*4882a593Smuzhiyun __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
48*4882a593Smuzhiyun const char *, unsigned int, struct svc_fh *);
49*4882a593Smuzhiyun __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
50*4882a593Smuzhiyun const char *, unsigned int,
51*4882a593Smuzhiyun struct svc_export **, struct dentry **);
52*4882a593Smuzhiyun __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
53*4882a593Smuzhiyun struct iattr *, int, time64_t);
54*4882a593Smuzhiyun int nfsd_mountpoint(struct dentry *, struct svc_export *);
55*4882a593Smuzhiyun #ifdef CONFIG_NFSD_V4
56*4882a593Smuzhiyun __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
57*4882a593Smuzhiyun struct xdr_netobj *);
58*4882a593Smuzhiyun __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
59*4882a593Smuzhiyun struct file *, loff_t, loff_t, int);
60*4882a593Smuzhiyun __be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos,
61*4882a593Smuzhiyun struct nfsd_file *nf_dst, u64 dst_pos,
62*4882a593Smuzhiyun u64 count, bool sync);
63*4882a593Smuzhiyun #endif /* CONFIG_NFSD_V4 */
64*4882a593Smuzhiyun __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
65*4882a593Smuzhiyun char *name, int len, struct iattr *attrs,
66*4882a593Smuzhiyun int type, dev_t rdev, struct svc_fh *res);
67*4882a593Smuzhiyun __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
68*4882a593Smuzhiyun char *name, int len, struct iattr *attrs,
69*4882a593Smuzhiyun int type, dev_t rdev, struct svc_fh *res);
70*4882a593Smuzhiyun #ifdef CONFIG_NFSD_V3
71*4882a593Smuzhiyun __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
72*4882a593Smuzhiyun __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *,
73*4882a593Smuzhiyun char *name, int len, struct iattr *attrs,
74*4882a593Smuzhiyun struct svc_fh *res, int createmode,
75*4882a593Smuzhiyun u32 *verifier, bool *truncp, bool *created);
76*4882a593Smuzhiyun __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
77*4882a593Smuzhiyun loff_t, unsigned long, __be32 *verf);
78*4882a593Smuzhiyun #endif /* CONFIG_NFSD_V3 */
79*4882a593Smuzhiyun #ifdef CONFIG_NFSD_V4
80*4882a593Smuzhiyun __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
81*4882a593Smuzhiyun char *name, void **bufp, int *lenp);
82*4882a593Smuzhiyun __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
83*4882a593Smuzhiyun char **bufp, int *lenp);
84*4882a593Smuzhiyun __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
85*4882a593Smuzhiyun char *name);
86*4882a593Smuzhiyun __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
87*4882a593Smuzhiyun char *name, void *buf, u32 len, u32 flags);
88*4882a593Smuzhiyun #endif
89*4882a593Smuzhiyun int nfsd_open_break_lease(struct inode *, int);
90*4882a593Smuzhiyun __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
91*4882a593Smuzhiyun int, struct file **);
92*4882a593Smuzhiyun __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t,
93*4882a593Smuzhiyun int, struct file **);
94*4882a593Smuzhiyun __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
95*4882a593Smuzhiyun struct file *file, loff_t offset,
96*4882a593Smuzhiyun unsigned long *count,
97*4882a593Smuzhiyun u32 *eof);
98*4882a593Smuzhiyun __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp,
99*4882a593Smuzhiyun struct file *file, loff_t offset,
100*4882a593Smuzhiyun struct kvec *vec, int vlen,
101*4882a593Smuzhiyun unsigned long *count,
102*4882a593Smuzhiyun u32 *eof);
103*4882a593Smuzhiyun __be32 nfsd_read(struct svc_rqst *, struct svc_fh *,
104*4882a593Smuzhiyun loff_t, struct kvec *, int, unsigned long *,
105*4882a593Smuzhiyun u32 *eof);
106*4882a593Smuzhiyun __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t,
107*4882a593Smuzhiyun struct kvec *, int, unsigned long *,
108*4882a593Smuzhiyun int stable, __be32 *verf);
109*4882a593Smuzhiyun __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
110*4882a593Smuzhiyun struct nfsd_file *nf, loff_t offset,
111*4882a593Smuzhiyun struct kvec *vec, int vlen, unsigned long *cnt,
112*4882a593Smuzhiyun int stable, __be32 *verf);
113*4882a593Smuzhiyun __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
114*4882a593Smuzhiyun char *, int *);
115*4882a593Smuzhiyun __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
116*4882a593Smuzhiyun char *name, int len, char *path,
117*4882a593Smuzhiyun struct svc_fh *res);
118*4882a593Smuzhiyun __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
119*4882a593Smuzhiyun char *, int, struct svc_fh *);
120*4882a593Smuzhiyun ssize_t nfsd_copy_file_range(struct file *, u64,
121*4882a593Smuzhiyun struct file *, u64, u64);
122*4882a593Smuzhiyun __be32 nfsd_rename(struct svc_rqst *,
123*4882a593Smuzhiyun struct svc_fh *, char *, int,
124*4882a593Smuzhiyun struct svc_fh *, char *, int);
125*4882a593Smuzhiyun __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
126*4882a593Smuzhiyun char *name, int len);
127*4882a593Smuzhiyun __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
128*4882a593Smuzhiyun loff_t *, struct readdir_cd *, nfsd_filldir_t);
129*4882a593Smuzhiyun __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
130*4882a593Smuzhiyun struct kstatfs *, int access);
131*4882a593Smuzhiyun
132*4882a593Smuzhiyun __be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
133*4882a593Smuzhiyun struct dentry *, int);
134*4882a593Smuzhiyun
fh_want_write(struct svc_fh * fh)135*4882a593Smuzhiyun static inline int fh_want_write(struct svc_fh *fh)
136*4882a593Smuzhiyun {
137*4882a593Smuzhiyun int ret;
138*4882a593Smuzhiyun
139*4882a593Smuzhiyun if (fh->fh_want_write)
140*4882a593Smuzhiyun return 0;
141*4882a593Smuzhiyun ret = mnt_want_write(fh->fh_export->ex_path.mnt);
142*4882a593Smuzhiyun if (!ret)
143*4882a593Smuzhiyun fh->fh_want_write = true;
144*4882a593Smuzhiyun return ret;
145*4882a593Smuzhiyun }
146*4882a593Smuzhiyun
fh_drop_write(struct svc_fh * fh)147*4882a593Smuzhiyun static inline void fh_drop_write(struct svc_fh *fh)
148*4882a593Smuzhiyun {
149*4882a593Smuzhiyun if (fh->fh_want_write) {
150*4882a593Smuzhiyun fh->fh_want_write = false;
151*4882a593Smuzhiyun mnt_drop_write(fh->fh_export->ex_path.mnt);
152*4882a593Smuzhiyun }
153*4882a593Smuzhiyun }
154*4882a593Smuzhiyun
fh_getattr(struct svc_fh * fh,struct kstat * stat)155*4882a593Smuzhiyun static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
156*4882a593Smuzhiyun {
157*4882a593Smuzhiyun struct path p = {.mnt = fh->fh_export->ex_path.mnt,
158*4882a593Smuzhiyun .dentry = fh->fh_dentry};
159*4882a593Smuzhiyun return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS,
160*4882a593Smuzhiyun AT_STATX_SYNC_AS_STAT));
161*4882a593Smuzhiyun }
162*4882a593Smuzhiyun
nfsd_create_is_exclusive(int createmode)163*4882a593Smuzhiyun static inline int nfsd_create_is_exclusive(int createmode)
164*4882a593Smuzhiyun {
165*4882a593Smuzhiyun return createmode == NFS3_CREATE_EXCLUSIVE
166*4882a593Smuzhiyun || createmode == NFS4_CREATE_EXCLUSIVE4_1;
167*4882a593Smuzhiyun }
168*4882a593Smuzhiyun
169*4882a593Smuzhiyun #endif /* LINUX_NFSD_VFS_H */
170