xfs_log_recover.h

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/*
 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_LOG_RECOVER_H__
#define __XFS_LOG_RECOVER_H__

/*
 * Macros, structures, prototypes for internal log manager use.
 */

#define XLOG_RHASH_BITS  4
#define XLOG_RHASH_SIZE 16
#define XLOG_RHASH_SHIFT 2
#define XLOG_RHASH(tid) \
    ((((__uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))

#define XLOG_MAX_REGIONS_IN_ITEM   (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1)


/*
 * item headers are in ri_buf[0].  Additional buffers follow.
 */
typedef struct xlog_recover_item {
    struct list_head    ri_list;
    int         ri_type;
    int         ri_cnt; /* count of regions found */
    int         ri_total;   /* total regions */
    xfs_log_iovec_t     *ri_buf;    /* ptr to regions buffer */
} xlog_recover_item_t;

struct xlog_tid;
typedef struct xlog_recover {
    struct hlist_node   r_list;
    xlog_tid_t      r_log_tid;  /* log's transaction id */
    xfs_trans_header_t  r_theader;  /* trans header for partial */
    int         r_state;    /* not needed */
    xfs_lsn_t       r_lsn;      /* xact lsn */
    struct list_head    r_itemq;    /* q for items */
} xlog_recover_t;

#define ITEM_TYPE(i)    (*(ushort *)(i)->ri_buf[0].i_addr)

/*
 * This is the number of entries in the l_buf_cancel_table used during
 * recovery.
 */
#define XLOG_BC_TABLE_SIZE  64

#define XLOG_RECOVER_PASS1  1
#define XLOG_RECOVER_PASS2  2

#endif  /* __XFS_LOG_RECOVER_H__ */