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/*
* Copyright (C) 2013 Red Hat, Inc.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*/
#ifndef _LVMLOCKD_H
#define _LVMLOCKD_H
#include "config-util.h"
#include "daemon-client.h"
#define LOCK_TYPE_NONE 0
#define LOCK_TYPE_CLVM 1
#define LOCK_TYPE_DLM 2
#define LOCK_TYPE_SANLOCK 3
/* dlock_gl flags */
#define DL_GL_MODE_NOARG 0x00000001
#define DL_GL_SKIP_CACHE_VALIDATE 0x00000002
#define DL_GL_UPDATE_NAMES 0x00000004
/* dlock_vg flags */
#define DL_VG_MODE_NOARG 0x00000001
/* lvmlockd_send result flags */
#define LD_RF_NO_LOCKSPACES 0x00000001
#define LD_RF_NO_GL_LS 0x00000002
#define LD_RF_LOCAL_LS 0x00000004
#define LD_RF_DUP_GL_LS 0x00000008
#define LD_RF_INACTIVE_LS 0x00000010
#define LD_RF_ADD_LS_ERROR 0x00000020
/*
* lock_type lock_type_num
* "none" -> LOCK_TYPE_NONE
* "clvm" -> LOCK_TYPE_CLVM
* "dlm -> LOCK_TYPE_DLM
* "sanlock" -> LOCK_TYPE_SANLOCK
*/
static inline int lock_type_to_num(const char *lock_type)
{
if (!lock_type)
return LOCK_TYPE_NONE;
if (!strcmp(lock_type, "none"))
return LOCK_TYPE_NONE;
if (!strcmp(lock_type, "clvm"))
return LOCK_TYPE_CLVM;
if (!strcmp(lock_type, "dlm"))
return LOCK_TYPE_DLM;
if (!strcmp(lock_type, "sanlock"))
return LOCK_TYPE_SANLOCK;
return -1;
}
/*
* Check if a lock_type uses lvmlockd.
* If not (none, clvm), return 0.
* If so (dlm, sanlock), return > 0 (LOCK_TYPE_)
*/
static inline int is_dlock_type(const char *lock_type)
{
if (!lock_type)
return 0;
if (!strcmp(lock_type, "dlm"))
return LOCK_TYPE_DLM;
if (!strcmp(lock_type, "sanlock"))
return LOCK_TYPE_SANLOCK;
return 0;
}
#ifdef LVMLOCKD_SUPPORT
/* lvmlockd connection and communication */
void lvmlockd_init(struct cmd_context *);
void lvmlockd_set_active(int);
void lvmlockd_set_socket(const char *);
void lvmlockd_disconnect(void);
void lvmlockd_connect_or_warn(void);
int lvmlockd_connected(void);
/* vgcreate/vgremove use init/free */
int lvmlockd_init_vg(struct cmd_context *cmd, struct volume_group *vg);
int lvmlockd_free_vg_before(struct cmd_context *cmd, struct volume_group *vg);
void lvmlockd_free_vg_final(struct cmd_context *cmd, struct volume_group *vg);
/* start and stop the lockspace for a vg */
int lvmlockd_start_vg(struct cmd_context *cmd, struct volume_group *vg);
int lvmlockd_stop_vg(struct cmd_context *cmd, struct volume_group *vg);
/* locking */
int lvmlockd_gl_create(struct cmd_context *cmd,
const char *cmd_name,
const char *mode,
const char *vg_lock_type);
int lvmlockd_gl(struct cmd_context *cmd,
const char *cmd_name,
const char *mode,
uint32_t flags);
int lvmlockd_vg(struct cmd_context *cmd,
const char *cmd_name,
const char *vg_name,
const char *mode,
uint32_t flags);
/* notify lvmlockd of a new VG seqno */
int lvmlockd_vg_update(struct volume_group *vg);
#else /* LVMLOCKD_SUPPORT */
#define lvmlockd_init(cmd) do { } while (0)
#define lvmlockd_set_active(int) do { } while (0)
#define lvmlockd_set_socket(str) do { } while (0)
#define lvmlockd_disconnect() do { } while (0)
#define lvmlockd_connect_or_warn() do { } while (0)
#define lvmlockd_connected (0)
#define lvmlockd_init_vg(cmd, vg) (0)
#define lvmlockd_free_vg_before(cmd, vg) (0)
#define lvmlockd_free_vg_final(cmd, vg) do { } while (0)
#define lvmlockd_start_vg(cmd, vg) (1)
#define lvmlockd_stop_vg(cmd, vg) (1)
int lvmlockd_gl_create(cmd, cmd_name, mode, vg_lock_type) (1)
int lvmlockd_gl(cmd, cmd_name, mode, flags) (1)
int lvmlockd_vg(cmd, cmd_name, vg_name, mode, flags) (1)
#define lvmlockd_vg_update(vg) (1)
#endif /* LVMLOCKD_SUPPORT */
#endif
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