fs/afs/vnode.h

   1 /* vnode.h: AFS vnode record
   2  *
   3  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #ifndef _LINUX_AFS_VNODE_H
  13 #define _LINUX_AFS_VNODE_H
  14
  15 #include <linux/fs.h>
  16 #include "server.h"
  17 #include "kafstimod.h"
  18 #include "cache.h"
  19
  20 #ifdef __KERNEL__
  21
  22 struct afs_rxfs_fetch_descriptor;
  23
  24 /*****************************************************************************/
  25 /*
  26  * vnode catalogue entry
  27  */
  28 struct afs_cache_vnode
  29 {
  30         afs_vnodeid_t           vnode_id;       /* vnode ID */
  31         unsigned                vnode_unique;   /* vnode ID uniquifier */
  32         afs_dataversion_t       data_version;   /* data version */
  33 };
  34
  35 #ifdef AFS_CACHING_SUPPORT
  36 extern struct cachefs_index_def afs_vnode_cache_index_def;
  37 #endif
  38
  39 /*****************************************************************************/
  40 /*
  41  * AFS inode private data
  42  */
  43 struct afs_vnode
  44 {
  45         struct inode            vfs_inode;      /* the VFS's inode record */
  46
  47         struct afs_volume       *volume;        /* volume on which vnode resides */
  48         struct afs_fid          fid;            /* the file identifier for this inode */
  49         struct afs_file_status  status;         /* AFS status info for this file */
  50 #ifdef AFS_CACHING_SUPPORT
  51         struct cachefs_cookie   *cache;         /* caching cookie */
  52 #endif
  53
  54         wait_queue_head_t       update_waitq;   /* status fetch waitqueue */
  55         unsigned                update_cnt;     /* number of outstanding ops that will update the
  56                                                  * status */
  57         spinlock_t              lock;           /* waitqueue/flags lock */
  58         unsigned                flags;
  59 #define AFS_VNODE_CHANGED       0x00000001      /* set if vnode reported changed by callback */
  60 #define AFS_VNODE_DELETED       0x00000002      /* set if vnode deleted on server */
  61 #define AFS_VNODE_MOUNTPOINT    0x00000004      /* set if vnode is a mountpoint symlink */
  62
  63         /* outstanding callback notification on this file */
  64         struct afs_server       *cb_server;     /* server that made the current promise */
  65         struct list_head        cb_link;        /* link in server's promises list */
  66         struct list_head        cb_hash_link;   /* link in master callback hash */
  67         struct afs_timer        cb_timeout;     /* timeout on promise */
  68         unsigned                cb_version;     /* callback version */
  69         unsigned                cb_expiry;      /* callback expiry time */
  70         afs_callback_type_t     cb_type;        /* type of callback */
  71 };
  72
  73 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
  74 {
  75         return container_of(inode,struct afs_vnode,vfs_inode);
  76 }
  77
  78 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
  79 {
  80         return &vnode->vfs_inode;
  81 }
  82
  83 extern int afs_vnode_fetch_status(struct afs_vnode *vnode);
  84
  85 extern int afs_vnode_fetch_data(struct afs_vnode *vnode,
  86                                 struct afs_rxfs_fetch_descriptor *desc);
  87
  88 extern int afs_vnode_give_up_callback(struct afs_vnode *vnode);
  89
  90 extern struct afs_timer_ops afs_vnode_cb_timed_out_ops;
  91
  92 #endif /* __KERNEL__ */
  93
  94 #endif /* _LINUX_AFS_VNODE_H */