LXR linux/fs/nfsd/vfs.h

   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 **);
  74void            nfsd_close(struct file *);
  75struct raparms;
  76__be32          nfsd_get_tmp_read_open(struct svc_rqst *, struct svc_fh *,
  77                                struct file **, struct raparms **);
  78void            nfsd_put_tmp_read_open(struct file *, struct raparms *);
  79__be32          nfsd_splice_read(struct svc_rqst *,
  80                                struct file *, loff_t, unsigned long *);
  81__be32          nfsd_readv(struct file *, loff_t, struct kvec *, int,
  82                                unsigned long *);
  83__be32          nfsd_read(struct svc_rqst *, struct svc_fh *,
  84                                loff_t, struct kvec *, int, unsigned long *);
  85__be32          nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
  86                                loff_t, struct kvec *,int, unsigned long *, int *);
  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
 107static inline int fh_want_write(struct svc_fh *fh)
 108{
 109        int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
 110
 111        if (!ret)
 112                fh->fh_want_write = 1;
 113        return ret;
 114}
 115
 116static inline void fh_drop_write(struct svc_fh *fh)
 117{
 118        if (fh->fh_want_write) {
 119                fh->fh_want_write = 0;
 120                mnt_drop_write(fh->fh_export->ex_path.mnt);
 121        }
 122}
 123
 124static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
 125{
 126        struct path p = {.mnt = fh->fh_export->ex_path.mnt,
 127                         .dentry = fh->fh_dentry};
 128        return nfserrno(vfs_getattr(&p, stat));
 129}
 130
 131#endif /* LINUX_NFSD_VFS_H */
 132