xfs_rtalloc.h 5.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
  4. * All Rights Reserved.
  5. */
  6. #ifndef __XFS_RTALLOC_H__
  7. #define __XFS_RTALLOC_H__
  8. /* kernel only definitions and functions */
  9. struct xfs_mount;
  10. struct xfs_trans;
  11. /*
  12. * XXX: Most of the realtime allocation functions deal in units of realtime
  13. * extents, not realtime blocks. This looks funny when paired with the type
  14. * name and screams for a larger cleanup.
  15. */
  16. struct xfs_rtalloc_rec {
  17. xfs_rtblock_t ar_startext;
  18. xfs_rtblock_t ar_extcount;
  19. };
  20. typedef int (*xfs_rtalloc_query_range_fn)(
  21. struct xfs_trans *tp,
  22. struct xfs_rtalloc_rec *rec,
  23. void *priv);
  24. #ifdef CONFIG_XFS_RT
  25. /*
  26. * Function prototypes for exported functions.
  27. */
  28. /*
  29. * Allocate an extent in the realtime subvolume, with the usual allocation
  30. * parameters. The length units are all in realtime extents, as is the
  31. * result block number.
  32. */
  33. int /* error */
  34. xfs_rtallocate_extent(
  35. struct xfs_trans *tp, /* transaction pointer */
  36. xfs_rtblock_t bno, /* starting block number to allocate */
  37. xfs_extlen_t minlen, /* minimum length to allocate */
  38. xfs_extlen_t maxlen, /* maximum length to allocate */
  39. xfs_extlen_t *len, /* out: actual length allocated */
  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. int xfs_rtalloc_query_range(struct xfs_trans *tp,
  115. struct xfs_rtalloc_rec *low_rec,
  116. struct xfs_rtalloc_rec *high_rec,
  117. xfs_rtalloc_query_range_fn fn,
  118. void *priv);
  119. int xfs_rtalloc_query_all(struct xfs_trans *tp,
  120. xfs_rtalloc_query_range_fn fn,
  121. void *priv);
  122. bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
  123. int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
  124. xfs_rtblock_t start, xfs_extlen_t len,
  125. bool *is_free);
  126. #else
  127. # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS)
  128. # define xfs_rtfree_extent(t,b,l) (ENOSYS)
  129. # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
  130. # define xfs_growfs_rt(mp,in) (ENOSYS)
  131. # define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS)
  132. # define xfs_rtalloc_query_all(t,f,p) (ENOSYS)
  133. # define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS)
  134. # define xfs_verify_rtbno(m, r) (false)
  135. # define xfs_rtalloc_extent_is_free(m,t,s,l,i) (ENOSYS)
  136. static inline int /* error */
  137. xfs_rtmount_init(
  138. xfs_mount_t *mp) /* file system mount structure */
  139. {
  140. if (mp->m_sb.sb_rblocks == 0)
  141. return 0;
  142. xfs_warn(mp, "Not built with CONFIG_XFS_RT");
  143. return -ENOSYS;
  144. }
  145. # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
  146. # define xfs_rtunmount_inodes(m)
  147. #endif /* CONFIG_XFS_RT */
  148. #endif /* __XFS_RTALLOC_H__ */