2 * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
3 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5 * This file is part of LVM2.
7 * This copyrighted material is made available to anyone wishing to use,
8 * modify, copy, or redistribute it subject to the terms and conditions
9 * of the GNU General Public License v.2.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software Foundation,
13 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 /* Definitions for CLVMD server and clients */
19 * The protocol spoken over the cluster and across the local socket.
25 #include "configure.h"
28 uint8_t cmd; /* See below */
29 uint8_t flags; /* See below */
30 uint16_t xid; /* Transaction ID */
31 uint32_t clientid; /* Only used in Daemon->Daemon comms */
32 int32_t status; /* For replies, whether request succeeded */
33 uint32_t arglen; /* Length of argument below.
34 If >1500 then it will be passed
35 around the cluster in the system LV */
36 char node[1]; /* Actually a NUL-terminated string, node name.
37 If this is empty then the command is
38 forwarded to all cluster nodes unless
39 FLAG_LOCAL is also set. */
40 char args[1]; /* Arguments for the command follow the
41 node name, This member is only
42 valid if the node name is empty */
43 } __attribute__ ((packed));
46 #define CLVMD_FLAG_LOCAL 1 /* Only do this on the local node */
47 #define CLVMD_FLAG_SYSTEMLV 2 /* Data in system LV under my node name */
48 #define CLVMD_FLAG_NODEERRS 4 /* Reply has errors in node-specific portion */
50 /* Name of the local socket to communicate between lvm and clvmd */
51 static const char CLVMD_SOCKNAME[]= DEFAULT_RUN_DIR "/clvmd.sock";
53 /* Internal commands & replies */
54 #define CLVMD_CMD_REPLY 1
55 #define CLVMD_CMD_VERSION 2 /* Send version around cluster when we start */
56 #define CLVMD_CMD_GOAWAY 3 /* Die if received this - we are running
57 an incompatible version */
58 #define CLVMD_CMD_TEST 4 /* Just for mucking about */
60 #define CLVMD_CMD_LOCK 30
61 #define CLVMD_CMD_UNLOCK 31
63 /* Lock/Unlock commands */
64 #define CLVMD_CMD_LOCK_LV 50
65 #define CLVMD_CMD_LOCK_VG 51
66 #define CLVMD_CMD_LOCK_QUERY 52
69 #define CLVMD_CMD_REFRESH 40
70 #define CLVMD_CMD_GET_CLUSTERNAME 41
71 #define CLVMD_CMD_SET_DEBUG 42
72 #define CLVMD_CMD_VG_BACKUP 43
73 #define CLVMD_CMD_RESTART 44