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  */
  39 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
  40
  41 /* nfsd/vfs.c */
  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 *);
  54 #ifdef CONFIG_NFSD_V4
  55 __be32          nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
  56                     struct xdr_netobj *);
  57 #endif /* CONFIG_NFSD_V4 */
  58 __be32          nfsd_create(struct svc_rqst *, struct svc_fh *,
  59                                 char *name, int len, struct iattr *attrs,
  60                                 int type, dev_t rdev, struct svc_fh *res);
  61 #ifdef CONFIG_NFSD_V3
  62 __be32          nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
  63 __be32          do_nfsd_create(struct svc_rqst *, struct svc_fh *,
  64                                 char *name, int len, struct iattr *attrs,
  65                                 struct svc_fh *res, int createmode,
  66                                 u32 *verifier, bool *truncp, bool *created);
  67 __be32          nfsd_commit(struct svc_rqst *, struct svc_fh *,
  68                                 loff_t, unsigned long);
  69 #endif /* CONFIG_NFSD_V3 */
  70 __be32          nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
  71                                 int, struct file **);
  72 void            nfsd_close(struct file *);
  73 struct raparms;
  74 __be32          nfsd_get_tmp_read_open(struct svc_rqst *, struct svc_fh *,
  75                                 struct file **, struct raparms **);
  76 void            nfsd_put_tmp_read_open(struct file *, struct raparms *);
  77 __be32          nfsd_splice_read(struct svc_rqst *,
  78                                 struct file *, loff_t, unsigned long *);
  79 __be32          nfsd_readv(struct file *, loff_t, struct kvec *, int,
  80                                 unsigned long *);
  81 __be32          nfsd_read(struct svc_rqst *, struct svc_fh *,
  82                                 loff_t, struct kvec *, int, unsigned long *);
  83 __be32          nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
  84                                 loff_t, struct kvec *,int, unsigned long *, int *);
  85 __be32          nfsd_readlink(struct svc_rqst *, struct svc_fh *,
  86                                 char *, int *);
  87 __be32          nfsd_symlink(struct svc_rqst *, struct svc_fh *,
  88                                 char *name, int len, char *path,
  89                                 struct svc_fh *res);
  90 __be32          nfsd_link(struct svc_rqst *, struct svc_fh *,
  91                                 char *, int, struct svc_fh *);
  92 __be32          nfsd_rename(struct svc_rqst *,
  93                                 struct svc_fh *, char *, int,
  94                                 struct svc_fh *, char *, int);
  95 __be32          nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
  96                                 char *name, int len);
  97 __be32          nfsd_readdir(struct svc_rqst *, struct svc_fh *,
  98                              loff_t *, struct readdir_cd *, nfsd_filldir_t);
  99 __be32          nfsd_statfs(struct svc_rqst *, struct svc_fh *,
 100                                 struct kstatfs *, int access);
 101
 102 __be32          nfsd_permission(struct svc_rqst *, struct svc_export *,
 103                                 struct dentry *, int);
 104
 105 static inline int fh_want_write(struct svc_fh *fh)
 106 {
 107         int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
 108
 109         if (!ret)
 110                 fh->fh_want_write = 1;
 111         return ret;
 112 }
 113
 114 static inline void fh_drop_write(struct svc_fh *fh)
 115 {
 116         if (fh->fh_want_write) {
 117                 fh->fh_want_write = 0;
 118                 mnt_drop_write(fh->fh_export->ex_path.mnt);
 119         }
 120 }
 121
 122 static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
 123 {
 124         struct path p = {.mnt = fh->fh_export->ex_path.mnt,
 125                          .dentry = fh->fh_dentry};
 126         return nfserrno(vfs_getattr(&p, stat));
 127 }
 128
 129 #endif /* LINUX_NFSD_VFS_H */