LXR linux/include/linux/nfsd/nfsfh.h

   1/*
   2 * include/linux/nfsd/nfsfh.h
   3 *
   4 * This file describes the layout of the file handles as passed
   5 * over the wire.
   6 *
   7 * Earlier versions of knfsd used to sign file handles using keyed MD5
   8 * or SHA. I've removed this code, because it doesn't give you more
   9 * security than blocking external access to port 2049 on your firewall.
  10 *
  11 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
  12 */
  13#ifndef _LINUX_NFSD_FH_H
  14#define _LINUX_NFSD_FH_H
  15
  16# include <linux/sunrpc/svc.h>
  17#include <uapi/linux/nfsd/nfsfh.h>
  18
  19static inline __u32 ino_t_to_u32(ino_t ino)
  20{
  21        return (__u32) ino;
  22}
  23
  24static inline ino_t u32_to_ino_t(__u32 uino)
  25{
  26        return (ino_t) uino;
  27}
  28
  29/*
  30 * This is the internal representation of an NFS handle used in knfsd.
  31 * pre_mtime/post_version will be used to support wcc_attr's in NFSv3.
  32 */
  33typedef struct svc_fh {
  34        struct knfsd_fh         fh_handle;      /* FH data */
  35        struct dentry *         fh_dentry;      /* validated dentry */
  36        struct svc_export *     fh_export;      /* export pointer */
  37        int                     fh_maxsize;     /* max size for fh_handle */
  38
  39        unsigned char           fh_locked;      /* inode locked by us */
  40        unsigned char           fh_want_write;  /* remount protection taken */
  41
  42#ifdef CONFIG_NFSD_V3
  43        unsigned char           fh_post_saved;  /* post-op attrs saved */
  44        unsigned char           fh_pre_saved;   /* pre-op attrs saved */
  45
  46        /* Pre-op attributes saved during fh_lock */
  47        __u64                   fh_pre_size;    /* size before operation */
  48        struct timespec         fh_pre_mtime;   /* mtime before oper */
  49        struct timespec         fh_pre_ctime;   /* ctime before oper */
  50        /*
  51         * pre-op nfsv4 change attr: note must check IS_I_VERSION(inode)
  52         *  to find out if it is valid.
  53         */
  54        u64                     fh_pre_change;
  55
  56        /* Post-op attributes saved in fh_unlock */
  57        struct kstat            fh_post_attr;   /* full attrs after operation */
  58        u64                     fh_post_change; /* nfsv4 change; see above */
  59#endif /* CONFIG_NFSD_V3 */
  60
  61} svc_fh;
  62
  63#endif /* _LINUX_NFSD_FH_H */
  64