242 lines
7.2 KiB
C
242 lines
7.2 KiB
C
/*-
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* Copyright (c) 1997, 1998
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* Nan Yang Computer Services Limited. All rights reserved.
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*
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* This software is distributed under the so-called ``Berkeley
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* License'':
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Nan Yang Computer
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* Services Limited.
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* 4. Neither the name of the Company nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* This software is provided ``as is'', and any express or implied
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose are disclaimed.
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* In no event shall the company or contributors be liable for any
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* direct, indirect, incidental, special, exemplary, or consequential
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* damages (including, but not limited to, procurement of substitute
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* goods or services; loss of use, data, or profits; or business
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* interruption) however caused and on any theory of liability, whether
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* in contract, strict liability, or tort (including negligence or
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* otherwise) arising in any way out of the use of this software, even if
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* advised of the possibility of such damage.
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*
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* $Id: vinumstate.h,v 1.12 1998/12/30 01:31:52 grog Exp grog $
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*/
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/*
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* This file gets read by makestatetext to create text files
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* with the names of the states, so don't change the file
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* format
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*/
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enum volumestate {
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volume_unallocated,
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/* present but unused. Must be 0 */
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volume_uninit,
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/* mentioned elsewhere but not known to the configuration */
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volume_down,
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/* The volume is up and functional, but not all plexes may be available */
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volume_up,
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volume_laststate = volume_up /* last value, for table dimensions */
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};
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enum plexstate {
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/* An empty entry, not a plex at all. */
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plex_unallocated,
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/*
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* The plex has been allocated, but there configuration
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* is not complete
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*/
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plex_init,
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/*
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* A plex which has gone completely down because of
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* I/O errors.
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*/
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plex_faulty,
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/*
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* A plex which has been taken down by the
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* administrator.
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*/
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plex_down,
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/* A plex which is being initialized */
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plex_initializing,
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/*
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* *** The remaining states represent plexes which are
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* at least partially up. Keep these separate so that
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* they can be checked more easily.
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*/
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/*
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* A plex entry which is at least partially up. Not
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* all subdisks are available, and an inconsistency
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* has occurred. If no other plex is uncorrupted,
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* the volume is no longer consistent.
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*/
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plex_corrupt,
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plex_firstup = plex_corrupt, /* first "up" state */
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/*
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* A RAID-5 plex entry which is accessible, but one
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* subdisk is down, requiring recovery for many
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* I/O requests.
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*/
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plex_degraded,
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/*
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* A plex which is really up, but which has a reborn
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* subdisk which we don't completely trust, and
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* which we don't want to read if we can avoid it
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*/
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plex_flaky,
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/*
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* A plex entry which is completely up. All subdisks
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* are up.
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*/
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plex_up,
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plex_laststate = plex_up /* last value, for table dimensions */
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};
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/* subdisk states */
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enum sdstate {
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/* An empty entry, not a subdisk at all. */
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sd_unallocated,
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/*
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* A subdisk entry which has not been created
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* completely. Some fields may be empty.
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*/
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sd_uninit,
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/*
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* A subdisk entry which has been created completely.
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* All fields are correct, but the disk hasn't
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* been updated.
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*/
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sd_init,
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/*
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* A subdisk entry which has been created completely.
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* All fields are correct, and the disk has been
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* updated, but there is no data on the disk.
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*/
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sd_empty,
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/*
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* A subdisk entry which has been created completely and
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* which is currently being initialized
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*/
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sd_initializing,
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/* *** The following states represent invalid data */
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/*
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* A subdisk entry which has been created completely.
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* All fields are correct, the config on disk has been
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* updated, and the data was valid, but since then the
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* drive has been taken down, and as a result updates
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* have been missed.
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*/
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sd_obsolete,
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/*
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* A subdisk entry which has been created completely.
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* All fields are correct, the disk has been updated,
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* and the data was valid, but since then the drive
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* has been crashed and updates have been lost.
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*/
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sd_stale,
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/* *** The following states represent valid, inaccessible data */
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/*
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* A subdisk entry which has been created completely.
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* All fields are correct, the disk has been updated,
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* and the data was valid, but since then the drive
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* has gone down. No attempt has been made to write
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* to the subdisk since the crash, so the data is valid.
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*/
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sd_crashed,
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/*
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* A subdisk entry which was up, which contained
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* valid data, and which was taken down by the
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* administrator. The data is valid.
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*/
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sd_down,
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/*
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* *** This is invalid data (the subdisk previously had
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* a numerically lower state), but it is currently in the
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* process of being revived. We can write but not read.
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*/
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sd_reviving,
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/*
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* *** The following states represent accessible subdisks
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* with valid data
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*/
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/*
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* A subdisk entry which has been created completely.
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* All fields are correct, the disk has been updated,
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* and the data was valid, but since then the drive
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* has gone down and up again. No updates were lost,
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* but it is possible that the subdisk has been
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* damaged. We won't read from this subdisk if we
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* have a choice. If this is the only subdisk which
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* covers this address space in the plex, we set its
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* state to sd_up under these circumstances, so this
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* status implies that there is another subdisk to
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* fulfil the request.
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*/
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sd_reborn,
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/*
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* A subdisk entry which has been created completely.
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* All fields are correct, the disk has been updated,
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* and the data is valid.
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*/
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sd_up,
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sd_laststate = sd_up /* last value, for table dimensions */
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};
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enum drivestate {
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drive_unallocated,
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/* present but unused. Must be 0 */
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drive_referenced,
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/* just mentioned in some other config entry */
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drive_down,
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/* not accessible */
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drive_up,
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/* up and running */
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drive_laststate = drive_up /* last value, for table dimensions */
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};
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