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/*
* Copyright (C) 2014 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 LOCKD_SANLOCK_LV_NAME "lvmlock"
#define LOCK_TYPE_NONE 0
#define LOCK_TYPE_CLVM 1
#define LOCK_TYPE_DLM 2
#define LOCK_TYPE_SANLOCK 3
/* lockd_gl flags */
#define LDGL_MODE_NOARG 0x00000001
#define LDGL_SKIP_CACHE_VALIDATE 0x00000002
#define LDGL_UPDATE_NAMES 0x00000004
/* lockd_vg flags */
#define LDVG_MODE_NOARG 0x00000001
/* lockd_lv flags */
#define LDLV_MODE_NOARG 0x00000001
#define LDLV_MODE_NO_SH 0x00000002
#define LDLV_PERSISTENT 0x00000004
/* lvmlockd 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
/* lockd_state flags */
#define LDST_EX 0x00000001
#define LDST_SH 0x00000002
#define LDST_FAIL_REQUEST 0x00000004
#define LDST_FAIL_NOLS 0x00000008
#define LDST_FAIL_STARTING 0x00000010
#define LDST_FAIL_OTHER 0x00000020
#define LDST_FAIL (LDST_FAIL_REQUEST | LDST_FAIL_NOLS | LDST_FAIL_STARTING | LDST_FAIL_OTHER)
/*
* 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_lockd_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_set_socket(const char *sock);
void lvmlockd_set_use(int use);
int lvmlockd_use(void);
void lvmlockd_init(struct cmd_context *cmd);
void lvmlockd_connect(void);
void lvmlockd_disconnect(void);
/* vgcreate/vgremove use init/free */
int lockd_init_vg(struct cmd_context *cmd, struct volume_group *vg, const char *lock_type);
int lockd_free_vg_before(struct cmd_context *cmd, struct volume_group *vg);
void lockd_free_vg_final(struct cmd_context *cmd, struct volume_group *vg);
/* vgrename */
int lockd_rename_vg_before(struct cmd_context *cmd, struct volume_group *vg);
int lockd_rename_vg_final(struct cmd_context *cmd, struct volume_group *vg, int success);
/* start and stop the lockspace for a vg */
int lockd_start_vg(struct cmd_context *cmd, struct volume_group *vg);
int lockd_stop_vg(struct cmd_context *cmd, struct volume_group *vg);
int lockd_start_wait(struct cmd_context *cmd);
/* locking */
int lockd_gl_create(struct cmd_context *cmd, const char *def_mode, const char *vg_lock_type);
int lockd_gl(struct cmd_context *cmd, const char *def_mode, uint32_t flags);
int lockd_vg(struct cmd_context *cmd, const char *vg_name, const char *def_mode,
uint32_t flags, uint32_t *lockd_state);
int lockd_vg_update(struct volume_group *vg);
int lockd_lv_name(struct cmd_context *cmd, struct volume_group *vg,
const char *lv_name, struct id *lv_id,
const char *lock_args, const char *def_mode, uint32_t flags);
int lockd_lv(struct cmd_context *cmd, struct logical_volume *lv,
const char *def_mode, uint32_t flags);
/* lvcreate/lvremove use init/free */
int lockd_init_lv(struct cmd_context *cmd, struct volume_group *vg, struct logical_volume *lv,
struct lvcreate_params *lp);
int lockd_init_lv_args(struct cmd_context *cmd, struct volume_group *vg,
struct logical_volume *lv, const char *lock_type, const char **lock_args);
int lockd_free_lv(struct cmd_context *cmd, struct volume_group *vg,
const char *lv_name, struct id *lv_id, const char *lock_args);
const char *lockd_running_lock_type(struct cmd_context *cmd);
int handle_sanlock_lv(struct cmd_context *cmd, struct volume_group *vg);
int lockd_lv_uses_lock(struct logical_volume *lv);
#else /* LVMLOCKD_SUPPORT */
static inline void lvmlockd_set_socket(const char *sock)
{
}
static inline void lvmlockd_set_use(int use)
{
}
static inline void lvmlockd_init(struct cmd_context *cmd)
{
}
static inline void lvmlockd_disconnect(void)
{
}
static inline void lvmlockd_connect(void)
{
}
static inline int lvmlockd_use(void)
{
return 0;
}
static inline int lockd_init_vg(struct cmd_context *cmd, struct volume_group *vg, const char *lock_type)
{
return 1;
}
static inline int lockd_free_vg_before(struct cmd_context *cmd, struct volume_group *vg)
{
return 1;
}
static inline void lockd_free_vg_final(struct cmd_context *cmd, struct volume_group *vg)
{
return;
}
static inline int lockd_rename_vg_before(struct cmd_context *cmd, struct volume_group *vg)
{
return 1;
}
static inline int lockd_rename_vg_final(struct cmd_context *cmd, struct volume_group *vg, int success)
{
return 1;
}
static inline int lockd_start_vg(struct cmd_context *cmd, struct volume_group *vg)
{
return 0;
}
static inline int lockd_stop_vg(struct cmd_context *cmd, struct volume_group *vg)
{
return 0;
}
static inline int lockd_start_wait(struct cmd_context *cmd)
{
return 0;
}
static inline int lockd_gl_create(struct cmd_context *cmd, const char *def_mode, const char *vg_lock_type)
{
return 1;
}
static inline int lockd_gl(struct cmd_context *cmd, const char *def_mode, uint32_t flags)
{
return 1;
}
static inline int lockd_vg(struct cmd_context *cmd, const char *vg_name, const char *def_mode,
uint32_t flags, uint32_t *lockd_state)
{
return 1;
}
static inline int lockd_vg_update(struct volume_group *vg)
{
return 1;
}
static inline int lockd_lv_name(struct cmd_context *cmd, struct volume_group *vg,
const char *lv_name, struct id *lv_id,
const char *lock_args, const char *def_mode, uint32_t flags)
{
return 1;
}
static inline int lockd_lv(struct cmd_context *cmd, struct logical_volume *lv,
const char *def_mode, uint32_t flags)
{
return 1;
}
static inline int lockd_init_lv(struct cmd_context *cmd, struct volume_group *vg,
struct logical_volume *lv, struct lvcreate_params *lp)
{
return 0;
}
static inline int lockd_init_lv_args(struct cmd_context *cmd, struct volume_group *vg,
struct logical_volume *lv, const char *lock_type, const char **lock_args)
{
return 0;
}
static inline int lockd_free_lv(struct cmd_context *cmd, struct volume_group *vg,
const char *lv_name, struct id *lv_id, const char *lock_args)
{
return 0;
}
static inline const char *lockd_running_lock_type(struct cmd_context *cmd)
{
return NULL;
}
static inline int handle_sanlock_lv(struct cmd_context *cmd, struct volume_group *vg)
{
return 0;
}
static inline int lockd_lv_uses_lock(struct logical_volume *lv)
{
return 0;
}
#endif /* LVMLOCKD_SUPPORT */
#endif
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