xfs_vnode.h 4.3 KB

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  1. /*
  2. * Copyright (c) 2000-2005 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_VNODE_H__
  19. #define __XFS_VNODE_H__
  20. #include "xfs_fs.h"
  21. struct file;
  22. struct xfs_inode;
  23. struct xfs_iomap;
  24. struct attrlist_cursor_kern;
  25. /*
  26. * Return values for xfs_inactive. A return value of
  27. * VN_INACTIVE_NOCACHE implies that the file system behavior
  28. * has disassociated its state and bhv_desc_t from the vnode.
  29. */
  30. #define VN_INACTIVE_CACHE 0
  31. #define VN_INACTIVE_NOCACHE 1
  32. /*
  33. * Flags for read/write calls - same values as IRIX
  34. */
  35. #define IO_ISAIO 0x00001 /* don't wait for completion */
  36. #define IO_ISDIRECT 0x00004 /* bypass page cache */
  37. #define IO_INVIS 0x00020 /* don't update inode timestamps */
  38. /*
  39. * Flags for xfs_inode_flush
  40. */
  41. #define FLUSH_SYNC 1 /* wait for flush to complete */
  42. /*
  43. * Flush/Invalidate options for vop_toss/flush/flushinval_pages.
  44. */
  45. #define FI_NONE 0 /* none */
  46. #define FI_REMAPF 1 /* Do a remapf prior to the operation */
  47. #define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
  48. Prevent VM access to the pages until
  49. the operation completes. */
  50. extern void vn_init(void);
  51. /*
  52. * Yeah, these don't take vnode anymore at all, all this should be
  53. * cleaned up at some point.
  54. */
  55. extern void vn_iowait(struct xfs_inode *ip);
  56. extern void vn_iowake(struct xfs_inode *ip);
  57. extern void vn_ioerror(struct xfs_inode *ip, int error, char *f, int l);
  58. #define IHOLD(ip) \
  59. do { \
  60. ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
  61. atomic_inc(&(VFS_I(ip)->i_count)); \
  62. xfs_itrace_hold((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
  63. } while (0)
  64. #define IRELE(ip) \
  65. do { \
  66. xfs_itrace_rele((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
  67. iput(VFS_I(ip)); \
  68. } while (0)
  69. /*
  70. * Dealing with bad inodes
  71. */
  72. static inline int VN_BAD(struct inode *vp)
  73. {
  74. return is_bad_inode(vp);
  75. }
  76. /*
  77. * Extracting atime values in various formats
  78. */
  79. static inline void vn_atime_to_bstime(struct inode *vp, xfs_bstime_t *bs_atime)
  80. {
  81. bs_atime->tv_sec = vp->i_atime.tv_sec;
  82. bs_atime->tv_nsec = vp->i_atime.tv_nsec;
  83. }
  84. static inline void vn_atime_to_timespec(struct inode *vp, struct timespec *ts)
  85. {
  86. *ts = vp->i_atime;
  87. }
  88. static inline void vn_atime_to_time_t(struct inode *vp, time_t *tt)
  89. {
  90. *tt = vp->i_atime.tv_sec;
  91. }
  92. /*
  93. * Some useful predicates.
  94. */
  95. #define VN_MAPPED(vp) mapping_mapped(vp->i_mapping)
  96. #define VN_CACHED(vp) (vp->i_mapping->nrpages)
  97. #define VN_DIRTY(vp) mapping_tagged(vp->i_mapping, \
  98. PAGECACHE_TAG_DIRTY)
  99. /*
  100. * Tracking vnode activity.
  101. */
  102. #if defined(XFS_INODE_TRACE)
  103. #define INODE_TRACE_SIZE 16 /* number of trace entries */
  104. #define INODE_KTRACE_ENTRY 1
  105. #define INODE_KTRACE_EXIT 2
  106. #define INODE_KTRACE_HOLD 3
  107. #define INODE_KTRACE_REF 4
  108. #define INODE_KTRACE_RELE 5
  109. extern void _xfs_itrace_entry(struct xfs_inode *, const char *, inst_t *);
  110. extern void _xfs_itrace_exit(struct xfs_inode *, const char *, inst_t *);
  111. extern void xfs_itrace_hold(struct xfs_inode *, char *, int, inst_t *);
  112. extern void _xfs_itrace_ref(struct xfs_inode *, char *, int, inst_t *);
  113. extern void xfs_itrace_rele(struct xfs_inode *, char *, int, inst_t *);
  114. #define xfs_itrace_entry(ip) \
  115. _xfs_itrace_entry(ip, __func__, (inst_t *)__return_address)
  116. #define xfs_itrace_exit(ip) \
  117. _xfs_itrace_exit(ip, __func__, (inst_t *)__return_address)
  118. #define xfs_itrace_exit_tag(ip, tag) \
  119. _xfs_itrace_exit(ip, tag, (inst_t *)__return_address)
  120. #define xfs_itrace_ref(ip) \
  121. _xfs_itrace_ref(ip, __FILE__, __LINE__, (inst_t *)__return_address)
  122. #else
  123. #define xfs_itrace_entry(a)
  124. #define xfs_itrace_exit(a)
  125. #define xfs_itrace_exit_tag(a, b)
  126. #define xfs_itrace_hold(a, b, c, d)
  127. #define xfs_itrace_ref(a)
  128. #define xfs_itrace_rele(a, b, c, d)
  129. #endif
  130. #endif /* __XFS_VNODE_H__ */