linux/fs/nfsd/vfs.h
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   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
  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 */
  38typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
  39
  40/* nfsd/vfs.c */
  41int             fh_lock_parent(struct svc_fh *, struct dentry *);
  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_acl(struct svc_rqst *, struct svc_fh *,
  56                    struct nfs4_acl *);
  57int             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 **);
  73void            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);
  94int             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
 101int             nfsd_notify_change(struct inode *, struct iattr *);
 102__be32          nfsd_permission(struct svc_rqst *, struct svc_export *,
 103                                struct dentry *, int);
 104int             nfsd_sync_dir(struct dentry *dp);
 105
 106#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 107struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
 108int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
 109#endif
 110
 111static 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
 120static 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 */
 129
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