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#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_dirop_t)(struct inode *, struct dentry *, int, int);
  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_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__be32          nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
  59                    struct xdr_netobj *);
  60#endif /* CONFIG_NFSD_V4 */
  61__be32          nfsd_create(struct svc_rqst *, struct svc_fh *,
  62                                char *name, int len, struct iattr *attrs,
  63                                int type, dev_t rdev, struct svc_fh *res);
  64#ifdef CONFIG_NFSD_V3
  65__be32          nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
  66__be32          do_nfsd_create(struct svc_rqst *, struct svc_fh *,
  67                                char *name, int len, struct iattr *attrs,
  68                                struct svc_fh *res, int createmode,
  69                                u32 *verifier, bool *truncp, bool *created);
  70__be32          nfsd_commit(struct svc_rqst *, struct svc_fh *,
  71                                loff_t, unsigned long);
  72#endif /* CONFIG_NFSD_V3 */
  73__be32          nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
  74                                int, struct file **);
  75void            nfsd_close(struct file *);
  76__be32          nfsd_read(struct svc_rqst *, struct svc_fh *,
  77                                loff_t, struct kvec *, int, unsigned long *);
  78__be32          nfsd_read_file(struct svc_rqst *, struct svc_fh *, struct file *,
  79                                loff_t, struct kvec *, int, unsigned long *);
  80__be32          nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
  81                                loff_t, struct kvec *,int, unsigned long *, int *);
  82__be32          nfsd_readlink(struct svc_rqst *, struct svc_fh *,
  83                                char *, int *);
  84__be32          nfsd_symlink(struct svc_rqst *, struct svc_fh *,
  85                                char *name, int len, char *path, int plen,
  86                                struct svc_fh *res, struct iattr *);
  87__be32          nfsd_link(struct svc_rqst *, struct svc_fh *,
  88                                char *, int, struct svc_fh *);
  89__be32          nfsd_rename(struct svc_rqst *,
  90                                struct svc_fh *, char *, int,
  91                                struct svc_fh *, char *, int);
  92__be32          nfsd_remove(struct svc_rqst *,
  93                                struct svc_fh *, char *, int);
  94__be32          nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
  95                                char *name, int len);
  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
 101__be32          nfsd_permission(struct svc_rqst *, struct svc_export *,
 102                                struct dentry *, int);
 103
 104#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 105struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
 106int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
 107#endif
 108
 109static inline int fh_want_write(struct svc_fh *fh)
 110{
 111        int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
 112
 113        if (!ret)
 114                fh->fh_want_write = 1;
 115        return ret;
 116}
 117
 118static inline void fh_drop_write(struct svc_fh *fh)
 119{
 120        if (fh->fh_want_write) {
 121                fh->fh_want_write = 0;
 122                mnt_drop_write(fh->fh_export->ex_path.mnt);
 123        }
 124}
 125
 126static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
 127{
 128        struct path p = {.mnt = fh->fh_export->ex_path.mnt,
 129                         .dentry = fh->fh_dentry};
 130        return nfserrno(vfs_getattr(&p, stat));
 131}
 132
 133#endif /* LINUX_NFSD_VFS_H */
 134
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