fs/xfs/linux-2.6/xfs_aops.h

   1 /*
   2  * Copyright (c) 2005-2006 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_AOPS_H__
  19 #define __XFS_AOPS_H__
  20
  21 extern struct workqueue_struct *xfsdatad_workqueue;
  22 extern mempool_t *xfs_ioend_pool;
  23
  24 typedef void (*xfs_ioend_func_t)(void *);
  25
  26 /*
  27  * xfs_ioend struct manages large extent writes for XFS.
  28  * It can manage several multi-page bio's at once.
  29  */
  30 typedef struct xfs_ioend {
  31         struct xfs_ioend        *io_list;       /* next ioend in chain */
  32         unsigned int            io_type;        /* delalloc / unwritten */
  33         int                     io_error;       /* I/O error code */
  34         atomic_t                io_remaining;   /* hold count */
  35         struct inode            *io_inode;      /* file being written to */
  36         struct buffer_head      *io_buffer_head;/* buffer linked list head */
  37         struct buffer_head      *io_buffer_tail;/* buffer linked list tail */
  38         size_t                  io_size;        /* size of the extent */
  39         xfs_off_t               io_offset;      /* offset in the file */
  40         struct work_struct      io_work;        /* xfsdatad work queue */
  41 } xfs_ioend_t;
  42
  43 extern const struct address_space_operations xfs_address_space_operations;
  44 extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
  45
  46 #endif /* __XFS_AOPS_H__ */