fs/xfs/xfs_trans_extfree.c

   1 /*
   2  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include "xfs.h"
  34 #include "xfs_macros.h"
  35 #include "xfs_types.h"
  36 #include "xfs_inum.h"
  37 #include "xfs_log.h"
  38 #include "xfs_trans.h"
  39 #include "xfs_sb.h"
  40 #include "xfs_dir.h"
  41 #include "xfs_dmapi.h"
  42 #include "xfs_mount.h"
  43 #include "xfs_trans_priv.h"
  44 #include "xfs_extfree_item.h"
  45
  46 /*
  47  * This routine is called to allocate an "extent free intention"
  48  * log item that will hold nextents worth of extents.  The
  49  * caller must use all nextents extents, because we are not
  50  * flexible about this at all.
  51  */
  52 xfs_efi_log_item_t *
  53 xfs_trans_get_efi(xfs_trans_t   *tp,
  54                   uint          nextents)
  55 {
  56         xfs_efi_log_item_t      *efip;
  57
  58         ASSERT(tp != NULL);
  59         ASSERT(nextents > 0);
  60
  61         efip = xfs_efi_init(tp->t_mountp, nextents);
  62         ASSERT(efip != NULL);
  63
  64         /*
  65          * Get a log_item_desc to point at the new item.
  66          */
  67         (void) xfs_trans_add_item(tp, (xfs_log_item_t*)efip);
  68
  69         return (efip);
  70 }
  71
  72 /*
  73  * This routine is called to indicate that the described
  74  * extent is to be logged as needing to be freed.  It should
  75  * be called once for each extent to be freed.
  76  */
  77 void
  78 xfs_trans_log_efi_extent(xfs_trans_t            *tp,
  79                          xfs_efi_log_item_t     *efip,
  80                          xfs_fsblock_t          start_block,
  81                          xfs_extlen_t           ext_len)
  82 {
  83         xfs_log_item_desc_t     *lidp;
  84         uint                    next_extent;
  85         xfs_extent_t            *extp;
  86
  87         lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efip);
  88         ASSERT(lidp != NULL);
  89
  90         tp->t_flags |= XFS_TRANS_DIRTY;
  91         lidp->lid_flags |= XFS_LID_DIRTY;
  92
  93         next_extent = efip->efi_next_extent;
  94         ASSERT(next_extent < efip->efi_format.efi_nextents);
  95         extp = &(efip->efi_format.efi_extents[next_extent]);
  96         extp->ext_start = start_block;
  97         extp->ext_len = ext_len;
  98         efip->efi_next_extent++;
  99 }
 100
 101
 102 /*
 103  * This routine is called to allocate an "extent free done"
 104  * log item that will hold nextents worth of extents.  The
 105  * caller must use all nextents extents, because we are not
 106  * flexible about this at all.
 107  */
 108 xfs_efd_log_item_t *
 109 xfs_trans_get_efd(xfs_trans_t           *tp,
 110                   xfs_efi_log_item_t    *efip,
 111                   uint                  nextents)
 112 {
 113         xfs_efd_log_item_t      *efdp;
 114
 115         ASSERT(tp != NULL);
 116         ASSERT(nextents > 0);
 117
 118         efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
 119         ASSERT(efdp != NULL);
 120
 121         /*
 122          * Get a log_item_desc to point at the new item.
 123          */
 124         (void) xfs_trans_add_item(tp, (xfs_log_item_t*)efdp);
 125
 126         return (efdp);
 127 }
 128
 129 /*
 130  * This routine is called to indicate that the described
 131  * extent is to be logged as having been freed.  It should
 132  * be called once for each extent freed.
 133  */
 134 void
 135 xfs_trans_log_efd_extent(xfs_trans_t            *tp,
 136                          xfs_efd_log_item_t     *efdp,
 137                          xfs_fsblock_t          start_block,
 138                          xfs_extlen_t           ext_len)
 139 {
 140         xfs_log_item_desc_t     *lidp;
 141         uint                    next_extent;
 142         xfs_extent_t            *extp;
 143
 144         lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efdp);
 145         ASSERT(lidp != NULL);
 146
 147         tp->t_flags |= XFS_TRANS_DIRTY;
 148         lidp->lid_flags |= XFS_LID_DIRTY;
 149
 150         next_extent = efdp->efd_next_extent;
 151         ASSERT(next_extent < efdp->efd_format.efd_nextents);
 152         extp = &(efdp->efd_format.efd_extents[next_extent]);
 153         extp->ext_start = start_block;
 154         extp->ext_len = ext_len;
 155         efdp->efd_next_extent++;
 156 }