fs/reiser4/status_flags.h

   1 /* Copyright 2001, 2002, 2003 by Hans Reiser, licensing governed by
   2  * reiser4/README */
   3
   4 /* Here we declare structures and flags that store reiser4 status on disk.
   5    The status that helps us to find out if the filesystem is valid or if it
   6    contains some critical, or not so critical errors */
   7
   8 #if !defined( __REISER4_STATUS_FLAGS_H__ )
   9 #define __REISER4_STATUS_FLAGS_H__
  10
  11 #include "dformat.h"
  12 /* These are major status flags */
  13 #define REISER4_STATUS_OK 0
  14 #define REISER4_STATUS_CORRUPTED 0x1
  15 #define REISER4_STATUS_DAMAGED 0x2
  16 #define REISER4_STATUS_DESTROYED 0x4
  17 #define REISER4_STATUS_IOERROR 0x8
  18
  19 /* Return values for reiser4_status_query() */
  20 #define REISER4_STATUS_MOUNT_OK 0
  21 #define REISER4_STATUS_MOUNT_WARN 1
  22 #define REISER4_STATUS_MOUNT_RO 2
  23 #define REISER4_STATUS_MOUNT_UNKNOWN -1
  24
  25 #define REISER4_TEXTERROR_LEN 256
  26
  27 #define REISER4_STATUS_MAGIC "ReiSeR4StATusBl"
  28 /* We probably need to keep its size under sector size which is 512 bytes */
  29 struct reiser4_status {
  30         char magic[16];
  31         d64 status;             /* Current FS state */
  32         d64 extended_status;    /* Any additional info that might have sense in addition to "status". E.g.
  33                                    last sector where io error happened if status is "io error encountered" */
  34         d64 stacktrace[10];     /* Last ten functional calls made (addresses) */
  35         char texterror[REISER4_TEXTERROR_LEN];  /* Any error message if appropriate, otherwise filled with zeroes */
  36 };
  37
  38 int reiser4_status_init(reiser4_block_nr block);
  39 int reiser4_status_query(u64 * status, u64 * extended);
  40 int reiser4_status_write(u64 status, u64 extended_status, char *message);
  41 int reiser4_status_finish(void);
  42
  43 #endif