xfs_rtalloc.h 4.9 KB

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  1. /*
  2. * Copyright (c) 2000-2003,2005 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_RTALLOC_H__
  19. #define __XFS_RTALLOC_H__
  20. /* kernel only definitions and functions */
  21. struct xfs_mount;
  22. struct xfs_trans;
  23. #ifdef CONFIG_XFS_RT
  24. /*
  25. * Function prototypes for exported functions.
  26. */
  27. /*
  28. * Allocate an extent in the realtime subvolume, with the usual allocation
  29. * parameters. The length units are all in realtime extents, as is the
  30. * result block number.
  31. */
  32. int /* error */
  33. xfs_rtallocate_extent(
  34. struct xfs_trans *tp, /* transaction pointer */
  35. xfs_rtblock_t bno, /* starting block number to allocate */
  36. xfs_extlen_t minlen, /* minimum length to allocate */
  37. xfs_extlen_t maxlen, /* maximum length to allocate */
  38. xfs_extlen_t *len, /* out: actual length allocated */
  39. xfs_alloctype_t type, /* allocation type XFS_ALLOCTYPE... */
  40. int wasdel, /* was a delayed allocation extent */
  41. xfs_extlen_t prod, /* extent product factor */
  42. xfs_rtblock_t *rtblock); /* out: start block allocated */
  43. /*
  44. * Free an extent in the realtime subvolume. Length is expressed in
  45. * realtime extents, as is the block number.
  46. */
  47. int /* error */
  48. xfs_rtfree_extent(
  49. struct xfs_trans *tp, /* transaction pointer */
  50. xfs_rtblock_t bno, /* starting block number to free */
  51. xfs_extlen_t len); /* length of extent freed */
  52. /*
  53. * Initialize realtime fields in the mount structure.
  54. */
  55. int /* error */
  56. xfs_rtmount_init(
  57. struct xfs_mount *mp); /* file system mount structure */
  58. void
  59. xfs_rtunmount_inodes(
  60. struct xfs_mount *mp);
  61. /*
  62. * Get the bitmap and summary inodes into the mount structure
  63. * at mount time.
  64. */
  65. int /* error */
  66. xfs_rtmount_inodes(
  67. struct xfs_mount *mp); /* file system mount structure */
  68. /*
  69. * Pick an extent for allocation at the start of a new realtime file.
  70. * Use the sequence number stored in the atime field of the bitmap inode.
  71. * Translate this to a fraction of the rtextents, and return the product
  72. * of rtextents and the fraction.
  73. * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
  74. */
  75. int /* error */
  76. xfs_rtpick_extent(
  77. struct xfs_mount *mp, /* file system mount point */
  78. struct xfs_trans *tp, /* transaction pointer */
  79. xfs_extlen_t len, /* allocation length (rtextents) */
  80. xfs_rtblock_t *pick); /* result rt extent */
  81. /*
  82. * Grow the realtime area of the filesystem.
  83. */
  84. int
  85. xfs_growfs_rt(
  86. struct xfs_mount *mp, /* file system mount structure */
  87. xfs_growfs_rt_t *in); /* user supplied growfs struct */
  88. /*
  89. * From xfs_rtbitmap.c
  90. */
  91. int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
  92. xfs_rtblock_t block, int issum, struct xfs_buf **bpp);
  93. int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
  94. xfs_rtblock_t start, xfs_extlen_t len, int val,
  95. xfs_rtblock_t *new, int *stat);
  96. int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
  97. xfs_rtblock_t start, xfs_rtblock_t limit,
  98. xfs_rtblock_t *rtblock);
  99. int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
  100. xfs_rtblock_t start, xfs_rtblock_t limit,
  101. xfs_rtblock_t *rtblock);
  102. int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
  103. xfs_rtblock_t start, xfs_extlen_t len, int val);
  104. int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
  105. int log, xfs_rtblock_t bbno, int delta,
  106. xfs_buf_t **rbpp, xfs_fsblock_t *rsb,
  107. xfs_suminfo_t *sum);
  108. int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
  109. xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp,
  110. xfs_fsblock_t *rsb);
  111. int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
  112. xfs_rtblock_t start, xfs_extlen_t len,
  113. struct xfs_buf **rbpp, xfs_fsblock_t *rsb);
  114. #else
  115. # define xfs_rtallocate_extent(t,b,min,max,l,a,f,p,rb) (ENOSYS)
  116. # define xfs_rtfree_extent(t,b,l) (ENOSYS)
  117. # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
  118. # define xfs_growfs_rt(mp,in) (ENOSYS)
  119. static inline int /* error */
  120. xfs_rtmount_init(
  121. xfs_mount_t *mp) /* file system mount structure */
  122. {
  123. if (mp->m_sb.sb_rblocks == 0)
  124. return 0;
  125. xfs_warn(mp, "Not built with CONFIG_XFS_RT");
  126. return -ENOSYS;
  127. }
  128. # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
  129. # define xfs_rtunmount_inodes(m)
  130. #endif /* CONFIG_XFS_RT */
  131. #endif /* __XFS_RTALLOC_H__ */