Halaman utama Jelajahi Bantuan
Daftar Masuk
phyus
/
linux-vybrid_public
8
0
Fork 0
Berkas Masalah 0 Permintaan Tarik 0 Wiki
Pohon: 166e1f901b
Ranting Tag
linux-vybrid_pu...
/
fs
/
xfs
/
linux-2.6
/
xfs_aops.h

xfs_aops.h 2.4 KB
Riwayat Mentahan

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768 
  1. /*
    2. 

  2.  * Copyright (c) 2005-2006 Silicon Graphics, Inc.
    3. 

  3.  * All Rights Reserved.
    4. 

  4.  *
    5. 

  5.  * This program is free software; you can redistribute it and/or
    6. 

  6.  * modify it under the terms of the GNU General Public License as
    7. 

  7.  * published by the Free Software Foundation.
    8. 

  8.  *
    9. 

  9.  * This program is distributed in the hope that it would be useful,
    10. 

  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11. 

  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12. 

  12.  * GNU General Public License for more details.
    13. 

  13.  *
    14. 

  14.  * You should have received a copy of the GNU General Public License
    15. 

  15.  * along with this program; if not, write the Free Software Foundation,
    16. 

  16.  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    17. 

  17.  */
    18. 

  18. #ifndef __XFS_AOPS_H__
    19. 

  19. #define __XFS_AOPS_H__
    20. 

  20. 

  21. extern struct workqueue_struct *xfsdatad_workqueue;
    22. 

  22. extern struct workqueue_struct *xfsconvertd_workqueue;
    23. 

  23. extern mempool_t *xfs_ioend_pool;
    24. 

  24. 

  25. /*
    26. 

  26.  * Types of I/O for bmap clustering and I/O completion tracking.
    27. 

  27.  */
    28. 

  28. enum {
    29. 

  29. 	IO_DIRECT = 0,	/* special case for direct I/O ioends */
    30. 

  30. 	IO_DELALLOC,	/* mapping covers delalloc region */
    31. 

  31. 	IO_UNWRITTEN,	/* mapping covers allocated but uninitialized data */
    32. 

  32. 	IO_OVERWRITE,	/* mapping covers already allocated extent */
    33. 

  33. };
    34. 

  34. 

  35. #define XFS_IO_TYPES \
    36. 

  36. 	{ 0,			"" }, \
    37. 

  37. 	{ IO_DELALLOC,		"delalloc" }, \
    38. 

  38. 	{ IO_UNWRITTEN,		"unwritten" }, \
    39. 

  39. 	{ IO_OVERWRITE,		"overwrite" }
    40. 

  40. 

  41. /*
    42. 

  42.  * xfs_ioend struct manages large extent writes for XFS.
    43. 

  43.  * It can manage several multi-page bio's at once.
    44. 

  44.  */
    45. 

  45. typedef struct xfs_ioend {
    46. 

  46. 	struct xfs_ioend	*io_list;	/* next ioend in chain */
    47. 

  47. 	unsigned int		io_type;	/* delalloc / unwritten */
    48. 

  48. 	int			io_error;	/* I/O error code */
    49. 

  49. 	atomic_t		io_remaining;	/* hold count */
    50. 

  50. 	struct inode		*io_inode;	/* file being written to */
    51. 

  51. 	struct buffer_head	*io_buffer_head;/* buffer linked list head */
    52. 

  52. 	struct buffer_head	*io_buffer_tail;/* buffer linked list tail */
    53. 

  53. 	size_t			io_size;	/* size of the extent */
    54. 

  54. 	xfs_off_t		io_offset;	/* offset in the file */
    55. 

  55. 	struct work_struct	io_work;	/* xfsdatad work queue */
    56. 

  56. 	struct kiocb		*io_iocb;
    57. 

  57. 	int			io_result;
    58. 

  58. } xfs_ioend_t;
    59. 

  59. 

  60. extern const struct address_space_operations xfs_address_space_operations;
    61. 

  61. extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
    62. 

  62. 

  63. extern void xfs_ioend_init(void);
    64. 

  64. extern void xfs_ioend_wait(struct xfs_inode *);
    65. 

  65. 

  66. extern void xfs_count_page_state(struct page *, int *, int *);
    67. 

  67. 

  68. #endif /* __XFS_AOPS_H__ */
    69.