fs/xfs/xfs_log_recover.h

   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 #ifndef __XFS_LOG_RECOVER_H__
  33 #define __XFS_LOG_RECOVER_H__
  34
  35 /*
  36  * Macros, structures, prototypes for internal log manager use.
  37  */
  38
  39 #define XLOG_RHASH_BITS  4
  40 #define XLOG_RHASH_SIZE 16
  41 #define XLOG_RHASH_SHIFT 2
  42 #define XLOG_RHASH(tid) \
  43         ((((__uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))
  44
  45 #define XLOG_MAX_REGIONS_IN_ITEM   (XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK / 2 + 1)
  46
  47
  48 /*
  49  * item headers are in ri_buf[0].  Additional buffers follow.
  50  */
  51 typedef struct xlog_recover_item {
  52         struct xlog_recover_item *ri_next;
  53         struct xlog_recover_item *ri_prev;
  54         int                      ri_type;
  55         int                      ri_cnt;        /* count of regions found */
  56         int                      ri_total;      /* total regions */
  57         xfs_log_iovec_t          *ri_buf;       /* ptr to regions buffer */
  58 } xlog_recover_item_t;
  59
  60 struct xlog_tid;
  61 typedef struct xlog_recover {
  62         struct xlog_recover *r_next;
  63         xlog_tid_t          r_log_tid;          /* log's transaction id */
  64         xfs_trans_header_t  r_theader;          /* trans header for partial */
  65         int                 r_state;            /* not needed */
  66         xfs_lsn_t           r_lsn;              /* xact lsn */
  67         xlog_recover_item_t *r_itemq;           /* q for items */
  68 } xlog_recover_t;
  69
  70 #define ITEM_TYPE(i)    (*(ushort *)(i)->ri_buf[0].i_addr)
  71
  72 /*
  73  * This is the number of entries in the l_buf_cancel_table used during
  74  * recovery.
  75  */
  76 #define XLOG_BC_TABLE_SIZE      64
  77
  78 #define XLOG_RECOVER_PASS1      1
  79 #define XLOG_RECOVER_PASS2      2
  80
  81 #endif  /* __XFS_LOG_RECOVER_H__ */