LXR linux/fs/coda/coda_fs

   1/*
   2 *  coda_fs_i.h
   3 *
   4 *  Copyright (C) 1998 Carnegie Mellon University
   5 *
   6 */
   7
   8#ifndef _LINUX_CODA_FS_I
   9#define _LINUX_CODA_FS_I
  10
  11#include <linux/types.h>
  12#include <linux/list.h>
  13#include <linux/spinlock.h>
  14#include <linux/coda.h>
  15
  16/*
  17 * coda fs inode data
  18 * c_lock protects accesses to c_flags, c_mapcount, c_cached_epoch, c_uid and
  19 * c_cached_perm.
  20 * vfs_inode is set only when the inode is created and never changes.
  21 * c_fid is set when the inode is created and should be considered immutable.
  22 */
  23struct coda_inode_info {
  24        struct CodaFid     c_fid;       /* Coda identifier */
  25        u_short            c_flags;     /* flags (see below) */
  26        unsigned int       c_mapcount;  /* nr of times this inode is mapped */
  27        unsigned int       c_cached_epoch; /* epoch for cached permissions */
  28        kuid_t             c_uid;       /* fsuid for cached permissions */
  29        unsigned int       c_cached_perm; /* cached access permissions */
  30        spinlock_t         c_lock;
  31        struct inode       vfs_inode;
  32};
  33
  34/*
  35 * coda fs file private data
  36 */
  37#define CODA_MAGIC 0xC0DAC0DA
  38struct coda_file_info {
  39        int                cfi_magic;     /* magic number */
  40        struct file       *cfi_container; /* container file for this cnode */
  41        unsigned int       cfi_mapcount;  /* nr of times this file is mapped */
  42};
  43
  44#define CODA_FTOC(file) ((struct coda_file_info *)((file)->private_data))
  45
  46/* flags */
  47#define C_VATTR       0x1   /* Validity of vattr in inode */
  48#define C_FLUSH       0x2   /* used after a flush */
  49#define C_DYING       0x4   /* from venus (which died) */
  50#define C_PURGE       0x8
  51
  52struct inode *coda_cnode_make(struct CodaFid *, struct super_block *);
  53struct inode *coda_iget(struct super_block *sb, struct CodaFid *fid, struct coda_vattr *attr);
  54struct inode *coda_cnode_makectl(struct super_block *sb);
  55struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb);
  56void coda_replace_fid(struct inode *, struct CodaFid *, struct CodaFid *);
  57
  58#endif
  59