LXR linux/drivers/block/drbd/drbd

   1/*
   2  drbd.h
   3
   4  This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
   5
   6  Copyright (C) 2003-2008, LINBIT Information Technologies GmbH.
   7  Copyright (C) 2003-2008, Philipp Reisner <philipp.reisner@linbit.com>.
   8  Copyright (C) 2003-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
   9
  10  drbd is free software; you can redistribute it and/or modify
  11  it under the terms of the GNU General Public License as published by
  12  the Free Software Foundation; either version 2, or (at your option)
  13  any later version.
  14
  15  drbd is distributed in the hope that it will be useful,
  16  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  GNU General Public License for more details.
  19
  20  You should have received a copy of the GNU General Public License
  21  along with drbd; see the file COPYING.  If not, write to
  22  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24*/
  25
  26#include <linux/drbd.h>
  27
  28static const char *drbd_conn_s_names[] = {
  29        [C_STANDALONE]       = "StandAlone",
  30        [C_DISCONNECTING]    = "Disconnecting",
  31        [C_UNCONNECTED]      = "Unconnected",
  32        [C_TIMEOUT]          = "Timeout",
  33        [C_BROKEN_PIPE]      = "BrokenPipe",
  34        [C_NETWORK_FAILURE]  = "NetworkFailure",
  35        [C_PROTOCOL_ERROR]   = "ProtocolError",
  36        [C_WF_CONNECTION]    = "WFConnection",
  37        [C_WF_REPORT_PARAMS] = "WFReportParams",
  38        [C_TEAR_DOWN]        = "TearDown",
  39        [C_CONNECTED]        = "Connected",
  40        [C_STARTING_SYNC_S]  = "StartingSyncS",
  41        [C_STARTING_SYNC_T]  = "StartingSyncT",
  42        [C_WF_BITMAP_S]      = "WFBitMapS",
  43        [C_WF_BITMAP_T]      = "WFBitMapT",
  44        [C_WF_SYNC_UUID]     = "WFSyncUUID",
  45        [C_SYNC_SOURCE]      = "SyncSource",
  46        [C_SYNC_TARGET]      = "SyncTarget",
  47        [C_PAUSED_SYNC_S]    = "PausedSyncS",
  48        [C_PAUSED_SYNC_T]    = "PausedSyncT",
  49        [C_VERIFY_S]         = "VerifyS",
  50        [C_VERIFY_T]         = "VerifyT",
  51        [C_AHEAD]            = "Ahead",
  52        [C_BEHIND]           = "Behind",
  53};
  54
  55static const char *drbd_role_s_names[] = {
  56        [R_PRIMARY]   = "Primary",
  57        [R_SECONDARY] = "Secondary",
  58        [R_UNKNOWN]   = "Unknown"
  59};
  60
  61static const char *drbd_disk_s_names[] = {
  62        [D_DISKLESS]     = "Diskless",
  63        [D_ATTACHING]    = "Attaching",
  64        [D_FAILED]       = "Failed",
  65        [D_NEGOTIATING]  = "Negotiating",
  66        [D_INCONSISTENT] = "Inconsistent",
  67        [D_OUTDATED]     = "Outdated",
  68        [D_UNKNOWN]      = "DUnknown",
  69        [D_CONSISTENT]   = "Consistent",
  70        [D_UP_TO_DATE]   = "UpToDate",
  71};
  72
  73static const char *drbd_state_sw_errors[] = {
  74        [-SS_TWO_PRIMARIES] = "Multiple primaries not allowed by config",
  75        [-SS_NO_UP_TO_DATE_DISK] = "Need access to UpToDate data",
  76        [-SS_NO_LOCAL_DISK] = "Can not resync without local disk",
  77        [-SS_NO_REMOTE_DISK] = "Can not resync without remote disk",
  78        [-SS_CONNECTED_OUTDATES] = "Refusing to be Outdated while Connected",
  79        [-SS_PRIMARY_NOP] = "Refusing to be Primary while peer is not outdated",
  80        [-SS_RESYNC_RUNNING] = "Can not start OV/resync since it is already active",
  81        [-SS_ALREADY_STANDALONE] = "Can not disconnect a StandAlone device",
  82        [-SS_CW_FAILED_BY_PEER] = "State change was refused by peer node",
  83        [-SS_IS_DISKLESS] = "Device is diskless, the requested operation requires a disk",
  84        [-SS_DEVICE_IN_USE] = "Device is held open by someone",
  85        [-SS_NO_NET_CONFIG] = "Have no net/connection configuration",
  86        [-SS_NO_VERIFY_ALG] = "Need a verify algorithm to start online verify",
  87        [-SS_NEED_CONNECTION] = "Need a connection to start verify or resync",
  88        [-SS_NOT_SUPPORTED] = "Peer does not support protocol",
  89        [-SS_LOWER_THAN_OUTDATED] = "Disk state is lower than outdated",
  90        [-SS_IN_TRANSIENT_STATE] = "In transient state, retry after next state change",
  91        [-SS_CONCURRENT_ST_CHG] = "Concurrent state changes detected and aborted",
  92        [-SS_OUTDATE_WO_CONN] = "Need a connection for a graceful disconnect/outdate peer",
  93        [-SS_O_VOL_PEER_PRI] = "Other vol primary on peer not allowed by config",
  94};
  95
  96const char *drbd_conn_str(enum drbd_conns s)
  97{
  98        /* enums are unsigned... */
  99        return s > C_BEHIND ? "TOO_LARGE" : drbd_conn_s_names[s];
 100}
 101
 102const char *drbd_role_str(enum drbd_role s)
 103{
 104        return s > R_SECONDARY   ? "TOO_LARGE" : drbd_role_s_names[s];
 105}
 106
 107const char *drbd_disk_str(enum drbd_disk_state s)
 108{
 109        return s > D_UP_TO_DATE    ? "TOO_LARGE" : drbd_disk_s_names[s];
 110}
 111
 112const char *drbd_set_st_err_str(enum drbd_state_rv err)
 113{
 114        return err <= SS_AFTER_LAST_ERROR ? "TOO_SMALL" :
 115               err > SS_TWO_PRIMARIES ? "TOO_LARGE"
 116                        : drbd_state_sw_errors[-err];
 117}
 118