fs/coda/coda_fs_i.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  coda_fs_i.h
   4  *
   5  *  Copyright (C) 1998 Carnegie Mellon University
   6  *
   7  */
   8
   9 #ifndef _LINUX_CODA_FS_I
  10 #define _LINUX_CODA_FS_I
  11
  12 #include <linux/types.h>
  13 #include <linux/list.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/coda.h>
  16
  17 /*
  18  * coda fs inode data
  19  * c_lock protects accesses to c_flags, c_mapcount, c_cached_epoch, c_uid and
  20  * c_cached_perm.
  21  * vfs_inode is set only when the inode is created and never changes.
  22  * c_fid is set when the inode is created and should be considered immutable.
  23  */
  24 struct coda_inode_info {
  25         struct CodaFid     c_fid;       /* Coda identifier */
  26         u_short            c_flags;     /* flags (see below) */
  27         unsigned int       c_mapcount;  /* nr of times this inode is mapped */
  28         unsigned int       c_cached_epoch; /* epoch for cached permissions */
  29         kuid_t             c_uid;       /* fsuid for cached permissions */
  30         unsigned int       c_cached_perm; /* cached access permissions */
  31         spinlock_t         c_lock;
  32         struct inode       vfs_inode;
  33 };
  34
  35 /*
  36  * coda fs file private data
  37  */
  38 #define CODA_MAGIC 0xC0DAC0DA
  39 struct coda_file_info {
  40         int                cfi_magic;     /* magic number */
  41         struct file       *cfi_container; /* container file for this cnode */
  42         unsigned int       cfi_mapcount;  /* nr of times this file is mapped */
  43 };
  44
  45 #define CODA_FTOC(file) ((struct coda_file_info *)((file)->private_data))
  46
  47 /* flags */
  48 #define C_VATTR       0x1   /* Validity of vattr in inode */
  49 #define C_FLUSH       0x2   /* used after a flush */
  50 #define C_DYING       0x4   /* from venus (which died) */
  51 #define C_PURGE       0x8
  52
  53 struct inode *coda_cnode_make(struct CodaFid *, struct super_block *);
  54 struct inode *coda_iget(struct super_block *sb, struct CodaFid *fid, struct coda_vattr *attr);
  55 struct inode *coda_cnode_makectl(struct super_block *sb);
  56 struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb);
  57 void coda_replace_fid(struct inode *, struct CodaFid *, struct CodaFid *);
  58
  59 #endif