fs/afs/vnode.h

   1 /* 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 AFS_VNODE_H
  13 #define AFS_VNODE_H
  14
  15 #include <linux/fs.h>
  16 #include "server.h"
  17 #include "kafstimod.h"
  18 #include "cache.h"
  19
  20 struct afs_rxfs_fetch_descriptor;
  21
  22 extern struct afs_timer_ops afs_vnode_cb_timed_out_ops;
  23
  24 /*
  25  * vnode catalogue entry
  26  */
  27 struct afs_cache_vnode {
  28         afs_vnodeid_t           vnode_id;       /* vnode ID */
  29         unsigned                vnode_unique;   /* vnode ID uniquifier */
  30         afs_dataversion_t       data_version;   /* data version */
  31 };
  32
  33 #ifdef AFS_CACHING_SUPPORT
  34 extern struct cachefs_index_def afs_vnode_cache_index_def;
  35 #endif
  36
  37 /*
  38  * AFS inode private data
  39  */
  40 struct afs_vnode {
  41         struct inode            vfs_inode;      /* the VFS's inode record */
  42
  43         struct afs_volume       *volume;        /* volume on which vnode resides */
  44         struct afs_fid          fid;            /* the file identifier for this inode */
  45         struct afs_file_status  status;         /* AFS status info for this file */
  46 #ifdef AFS_CACHING_SUPPORT
  47         struct cachefs_cookie   *cache;         /* caching cookie */
  48 #endif
  49
  50         wait_queue_head_t       update_waitq;   /* status fetch waitqueue */
  51         unsigned                update_cnt;     /* number of outstanding ops that will update the
  52                                                  * status */
  53         spinlock_t              lock;           /* waitqueue/flags lock */
  54         unsigned                flags;
  55 #define AFS_VNODE_CHANGED       0x00000001      /* set if vnode reported changed by callback */
  56 #define AFS_VNODE_DELETED       0x00000002      /* set if vnode deleted on server */
  57 #define AFS_VNODE_MOUNTPOINT    0x00000004      /* set if vnode is a mountpoint symlink */
  58
  59         /* outstanding callback notification on this file */
  60         struct afs_server       *cb_server;     /* server that made the current promise */
  61         struct list_head        cb_link;        /* link in server's promises list */
  62         struct list_head        cb_hash_link;   /* link in master callback hash */
  63         struct afs_timer        cb_timeout;     /* timeout on promise */
  64         unsigned                cb_version;     /* callback version */
  65         unsigned                cb_expiry;      /* callback expiry time */
  66         afs_callback_type_t     cb_type;        /* type of callback */
  67 };
  68
  69 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
  70 {
  71         return container_of(inode, struct afs_vnode, vfs_inode);
  72 }
  73
  74 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
  75 {
  76         return &vnode->vfs_inode;
  77 }
  78
  79 extern int afs_vnode_fetch_status(struct afs_vnode *);
  80 extern int afs_vnode_fetch_data(struct afs_vnode *,
  81                                 struct afs_rxfs_fetch_descriptor *);
  82 extern int afs_vnode_give_up_callback(struct afs_vnode *);
  83
  84 #endif /* AFS_VNODE_H */