libxfs/xfs_rtbitmap.h

   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_RTBITMAP_H__
   7 #define __XFS_RTBITMAP_H__
   8
   9 /*
  10  * XXX: Most of the realtime allocation functions deal in units of realtime
  11  * extents, not realtime blocks.  This looks funny when paired with the type
  12  * name and screams for a larger cleanup.
  13  */
  14 struct xfs_rtalloc_rec {
  15         xfs_rtblock_t           ar_startext;
  16         xfs_rtbxlen_t           ar_extcount;
  17 };
  18
  19 typedef int (*xfs_rtalloc_query_range_fn)(
  20         struct xfs_mount                *mp,
  21         struct xfs_trans                *tp,
  22         const struct xfs_rtalloc_rec    *rec,
  23         void                            *priv);
  24
  25 #ifdef CONFIG_XFS_RT
  26 int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
  27                   xfs_fileoff_t block, int issum, struct xfs_buf **bpp);
  28 int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
  29                       xfs_rtblock_t start, xfs_rtxlen_t len, int val,
  30                       xfs_rtblock_t *new, int *stat);
  31 int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
  32                     xfs_rtblock_t start, xfs_rtblock_t limit,
  33                     xfs_rtblock_t *rtblock);
  34 int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
  35                     xfs_rtblock_t start, xfs_rtblock_t limit,
  36                     xfs_rtblock_t *rtblock);
  37 int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
  38                        xfs_rtblock_t start, xfs_rtxlen_t len, int val);
  39 int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
  40                              int log, xfs_fileoff_t bbno, int delta,
  41                              struct xfs_buf **rbpp, xfs_fileoff_t *rsb,
  42                              xfs_suminfo_t *sum);
  43 int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
  44                          xfs_fileoff_t bbno, int delta, struct xfs_buf **rbpp,
  45                          xfs_fileoff_t *rsb);
  46 int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
  47                      xfs_rtblock_t start, xfs_rtxlen_t len,
  48                      struct xfs_buf **rbpp, xfs_fileoff_t *rsb);
  49 int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp,
  50                 const struct xfs_rtalloc_rec *low_rec,
  51                 const struct xfs_rtalloc_rec *high_rec,
  52                 xfs_rtalloc_query_range_fn fn, void *priv);
  53 int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp,
  54                           xfs_rtalloc_query_range_fn fn,
  55                           void *priv);
  56 int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
  57                                xfs_rtblock_t start, xfs_rtxlen_t len,
  58                                bool *is_free);
  59 /*
  60  * Free an extent in the realtime subvolume.  Length is expressed in
  61  * realtime extents, as is the block number.
  62  */
  63 int                                     /* error */
  64 xfs_rtfree_extent(
  65         struct xfs_trans        *tp,    /* transaction pointer */
  66         xfs_rtblock_t           bno,    /* starting block number to free */
  67         xfs_rtxlen_t            len);   /* length of extent freed */
  68
  69 /* Same as above, but in units of rt blocks. */
  70 int xfs_rtfree_blocks(struct xfs_trans *tp, xfs_fsblock_t rtbno,
  71                 xfs_filblks_t rtlen);
  72 #else /* CONFIG_XFS_RT */
  73 # define xfs_rtfree_extent(t,b,l)                       (-ENOSYS)
  74 # define xfs_rtfree_blocks(t,rb,rl)                     (-ENOSYS)
  75 # define xfs_rtalloc_query_range(m,t,l,h,f,p)           (-ENOSYS)
  76 # define xfs_rtalloc_query_all(m,t,f,p)                 (-ENOSYS)
  77 # define xfs_rtbuf_get(m,t,b,i,p)                       (-ENOSYS)
  78 # define xfs_rtalloc_extent_is_free(m,t,s,l,i)          (-ENOSYS)
  79 #endif /* CONFIG_XFS_RT */
  80
  81 #endif /* __XFS_RTBITMAP_H__ */