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linux-arkmicro
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linux
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fs
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xfs
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xfs_buf_item.h

xfs_buf_item.h 2.1 KB
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  1. // SPDX-License-Identifier: GPL-2.0
    2. 

  2. /*
    3. 

  3.  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
    4. 

  4.  * All Rights Reserved.
    5. 

  5.  */
    6. 

  6. #ifndef	__XFS_BUF_ITEM_H__
    7. 

  7. #define	__XFS_BUF_ITEM_H__
    8. 

  8. 

  9. /* kernel only definitions */
    10. 

  10. 

  11. /* buf log item flags */
    12. 

  12. #define	XFS_BLI_HOLD		0x01
    13. 

  13. #define	XFS_BLI_DIRTY		0x02
    14. 

  14. #define	XFS_BLI_STALE		0x04
    15. 

  15. #define	XFS_BLI_LOGGED		0x08
    16. 

  16. #define	XFS_BLI_INODE_ALLOC_BUF	0x10
    17. 

  17. #define XFS_BLI_STALE_INODE	0x20
    18. 

  18. #define	XFS_BLI_INODE_BUF	0x40
    19. 

  19. #define	XFS_BLI_ORDERED		0x80
    20. 

  20. 

  21. #define XFS_BLI_FLAGS \
    22. 

  22. 	{ XFS_BLI_HOLD,		"HOLD" }, \
    23. 

  23. 	{ XFS_BLI_DIRTY,	"DIRTY" }, \
    24. 

  24. 	{ XFS_BLI_STALE,	"STALE" }, \
    25. 

  25. 	{ XFS_BLI_LOGGED,	"LOGGED" }, \
    26. 

  26. 	{ XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
    27. 

  27. 	{ XFS_BLI_STALE_INODE,	"STALE_INODE" }, \
    28. 

  28. 	{ XFS_BLI_INODE_BUF,	"INODE_BUF" }, \
    29. 

  29. 	{ XFS_BLI_ORDERED,	"ORDERED" }
    30. 

  30. 

  31. 

  32. struct xfs_buf;
    33. 

  33. struct xfs_mount;
    34. 

  34. struct xfs_buf_log_item;
    35. 

  35. 

  36. /*
    37. 

  37.  * This is the in core log item structure used to track information
    38. 

  38.  * needed to log buffers.  It tracks how many times the lock has been
    39. 

  39.  * locked, and which 128 byte chunks of the buffer are dirty.
    40. 

  40.  */
    41. 

  41. struct xfs_buf_log_item {
    42. 

  42. 	xfs_log_item_t		bli_item;	/* common item structure */
    43. 

  43. 	struct xfs_buf		*bli_buf;	/* real buffer pointer */
    44. 

  44. 	unsigned int		bli_flags;	/* misc flags */
    45. 

  45. 	unsigned int		bli_recur;	/* lock recursion count */
    46. 

  46. 	atomic_t		bli_refcount;	/* cnt of tp refs */
    47. 

  47. 	int			bli_format_count;	/* count of headers */
    48. 

  48. 	struct xfs_buf_log_format *bli_formats;	/* array of in-log header ptrs */
    49. 

  49. 	struct xfs_buf_log_format __bli_format;	/* embedded in-log header */
    50. 

  50. };
    51. 

  51. 

  52. int	xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
    53. 

  53. void	xfs_buf_item_relse(struct xfs_buf *);
    54. 

  54. bool	xfs_buf_item_put(struct xfs_buf_log_item *);
    55. 

  55. void	xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
    56. 

  56. bool	xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
    57. 

  57. void	xfs_buf_attach_iodone(struct xfs_buf *,
    58. 

  58. 			      void(*)(struct xfs_buf *, xfs_log_item_t *),
    59. 

  59. 			      xfs_log_item_t *);
    60. 

  60. void	xfs_buf_iodone_callbacks(struct xfs_buf *);
    61. 

  61. void	xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
    62. 

  62. bool	xfs_buf_resubmit_failed_buffers(struct xfs_buf *,
    63. 

  63. 					struct list_head *);
    64. 

  64. 

  65. extern kmem_zone_t	*xfs_buf_item_zone;
    66. 

  66. 

  67. #endif	/* __XFS_BUF_ITEM_H__ */
    68.