include/libxlog.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000-2005 Silicon Graphics, Inc.All Rights Reserved.
   4  */
   5 #ifndef LIBXLOG_H
   6 #define LIBXLOG_H
   7
   8 /*
   9  * define the userlevel xlog_t to be the subset of the kernel's
  10  * xlog_t that we actually need to get our work done, avoiding
  11  * the need to define any exotic kernel types in userland.
  12  */
  13 struct xlog {
  14         atomic64_t      l_tail_lsn;     /* lsn of 1st LR w/ unflush buffers */
  15         atomic64_t      l_last_sync_lsn;/* lsn of last LR on disk */
  16         xfs_mount_t     *l_mp;          /* mount point */
  17         struct xfs_buftarg *l_dev;              /* dev_t of log */
  18         xfs_daddr_t     l_logBBstart;   /* start block of log */
  19         int             l_logBBsize;    /* size of log in 512 byte chunks */
  20         int             l_curr_cycle;   /* Cycle number of log writes */
  21         int             l_prev_cycle;   /* Cycle # b4 last block increment */
  22         int             l_curr_block;   /* current logical block of log */
  23         int             l_prev_block;   /* previous logical block of log */
  24         int             l_iclog_size;    /* size of log in bytes */
  25         int             l_iclog_size_log;/* log power size of log */
  26         int             l_iclog_bufs;    /* number of iclog buffers */
  27         atomic64_t      l_grant_reserve_head;
  28         atomic64_t      l_grant_write_head;
  29         uint            l_sectbb_log;   /* log2 of sector size in bbs */
  30         uint            l_sectbb_mask;  /* sector size (in BBs)
  31                                          * alignment mask */
  32         int             l_sectBBsize;   /* size of log sector in 512 byte chunks */
  33 };
  34
  35 #include "xfs_log_recover.h"
  36
  37 /*
  38  * macros mapping kernel code to user code
  39  *
  40  * XXX: this is duplicated stuff - should be shared with libxfs.
  41  */
  42 #ifndef EFSCORRUPTED
  43 #define EFSCORRUPTED                     990
  44 #endif
  45 #define STATIC                          static
  46 #define XFS_ERROR(e)                    (e)
  47 #ifdef DEBUG
  48 #define XFS_ERROR_REPORT(e,l,mp)        fprintf(stderr, "ERROR: %s\n", e)
  49 #else
  50 #define XFS_ERROR_REPORT(e,l,mp)        ((void) 0)
  51 #endif
  52 #define XFS_CORRUPTION_ERROR(e,l,mp,m)  ((void) 0)
  53 #define XFS_MOUNT_WAS_CLEAN             0x1
  54 #define unlikely(x)                     (x)
  55 #define xfs_alert(mp,fmt,args...)       cmn_err(CE_ALERT,fmt, ## args)
  56 #define xfs_warn(mp,fmt,args...)        cmn_err(CE_WARN,fmt, ## args)
  57 #define xfs_hex_dump(d,n)               ((void) 0)
  58 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
  59 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
  60 #define round_down(x, y) ((x) & ~__round_mask(x, y))
  61
  62 extern void xlog_warn(char *fmt,...);
  63 extern void xlog_exit(char *fmt,...);
  64 extern void xlog_panic(char *fmt,...);
  65
  66 /* exports */
  67 extern int      print_exit;
  68 extern int      print_skip_uuid;
  69 extern int      print_record_header;
  70
  71 void xlog_init(struct xfs_mount *mp, struct xlog *log);
  72 int xlog_is_dirty(struct xfs_mount *mp, struct xlog *log);
  73
  74 extern struct xfs_buf *xlog_get_bp(struct xlog *, int);
  75 extern int      xlog_bread(struct xlog *log, xfs_daddr_t blk_no, int nbblks,
  76                                 struct xfs_buf *bp, char **offset);
  77 extern int      xlog_bread_noalign(struct xlog *log, xfs_daddr_t blk_no,
  78                                 int nbblks, struct xfs_buf *bp);
  79
  80 extern int      xlog_find_zeroed(struct xlog *log, xfs_daddr_t *blk_no);
  81 extern int      xlog_find_cycle_start(struct xlog *log, struct xfs_buf *bp,
  82                                 xfs_daddr_t first_blk, xfs_daddr_t *last_blk,
  83                                 uint cycle);
  84 extern int      xlog_find_tail(struct xlog *log, xfs_daddr_t *head_blk,
  85                                 xfs_daddr_t *tail_blk);
  86
  87 extern int      xlog_recover(struct xlog *log, int readonly);
  88 extern void     xlog_recover_print_data(char *p, int len);
  89 extern void     xlog_recover_print_logitem(struct xlog_recover_item *item);
  90 extern void     xlog_recover_print_trans_head(struct xlog_recover *tr);
  91 extern int      xlog_print_find_oldest(struct xlog *log, xfs_daddr_t *last_blk);
  92
  93 /* for transactional view */
  94 extern void     xlog_recover_print_trans_head(struct xlog_recover *tr);
  95 extern void     xlog_recover_print_trans(struct xlog_recover *trans,
  96                                 struct list_head *itemq, int print);
  97 extern int      xlog_do_recovery_pass(struct xlog *log, xfs_daddr_t head_blk,
  98                                 xfs_daddr_t tail_blk, int pass);
  99 extern int      xlog_recover_do_trans(struct xlog *log, struct xlog_recover *trans,
 100                                 int pass);
 101 extern int      xlog_header_check_recover(xfs_mount_t *mp,
 102                                 xlog_rec_header_t *head);
 103 extern int      xlog_header_check_mount(xfs_mount_t *mp,
 104                                 xlog_rec_header_t *head);
 105
 106 #define xlog_assign_atomic_lsn(l,a,b) ((void) 0)
 107 #define xlog_assign_grant_head(l,a,b) ((void) 0)
 108 #endif  /* LIBXLOG_H */