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 <linux/version.h>
  17 #include "server.h"
  18 #include "kafstimod.h"
  19
  20 #ifdef __KERNEL__
  21
  22 struct afs_rxfs_fetch_descriptor;
  23
  24 /*****************************************************************************/
  25 /*
  26  * AFS inode private data
  27  */
  28 struct afs_vnode
  29 {
  30         struct inode            vfs_inode;      /* the VFS's inode record */
  31
  32         afs_volume_t            *volume;        /* volume on which vnode resides */
  33         afs_fid_t               fid;            /* the file identifier for this inode */
  34         afs_file_status_t       status;         /* AFS status info for this file */
  35         unsigned                nix;            /* vnode index in cache */
  36
  37         wait_queue_head_t       update_waitq;   /* status fetch waitqueue */
  38         unsigned                update_cnt;     /* number of outstanding ops that will update the
  39                                                  * status */
  40         spinlock_t              lock;           /* waitqueue/flags lock */
  41         unsigned                flags;
  42 #define AFS_VNODE_CHANGED       0x00000001      /* set if vnode reported changed by callback */
  43 #define AFS_VNODE_DELETED       0x00000002      /* set if vnode deleted on server */
  44 #define AFS_VNODE_MOUNTPOINT    0x00000004      /* set if vnode is a mountpoint symlink */
  45
  46         /* outstanding callback notification on this file */
  47         afs_server_t            *cb_server;     /* server that made the current promise */
  48         struct list_head        cb_link;        /* link in server's promises list */
  49         struct list_head        cb_hash_link;   /* link in master callback hash */
  50         afs_timer_t             cb_timeout;     /* timeout on promise */
  51         unsigned                cb_version;     /* callback version */
  52         unsigned                cb_expiry;      /* callback expiry time */
  53         afs_callback_type_t     cb_type;        /* type of callback */
  54 };
  55
  56 static inline afs_vnode_t *AFS_FS_I(struct inode *inode)
  57 {
  58         return container_of(inode,afs_vnode_t,vfs_inode);
  59 }
  60
  61 static inline struct inode *AFS_VNODE_TO_I(afs_vnode_t *vnode)
  62 {
  63         return &vnode->vfs_inode;
  64 }
  65
  66 extern int afs_vnode_fetch_status(afs_vnode_t *vnode);
  67
  68 extern int afs_vnode_fetch_data(afs_vnode_t *vnode, struct afs_rxfs_fetch_descriptor *desc);
  69
  70 extern int afs_vnode_give_up_callback(afs_vnode_t *vnode);
  71
  72 extern struct afs_timer_ops afs_vnode_cb_timed_out_ops;
  73
  74 #endif /* __KERNEL__ */
  75
  76 #endif /* _LINUX_AFS_VNODE_H */