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Code Releases Activity

Implement a no_locking module that *does* attempt activation.

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This commit is contained in:
Alasdair Kergon 2002-04-11 14:10:32 +00:00
parent 63def4e716
commit 7e3d403b88
4 changed files with 65 additions and 22 deletions
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3
lib/Makefile.in
View File

@ -38,9 +38,10 @@ SOURCES=\
format_text/import.c \
label/label.c \
label/uuid-map.c \
locking/file_locking.c \
locking/external_locking.c \
locking/file_locking.c \
locking/locking.c \
locking/no_locking.c \
log/log.c \
metadata/lv_manip.c \
metadata/merge.c \

22
lib/locking/locking.c
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@ -65,26 +65,6 @@ static inline void _update_lock_count(int flags)
_lock_count++;
}
/*
* No locking - currently does nothing.
*/
int no_lock_resource(struct cmd_context *cmd, const char *resource, int flags)
{
return 1;
}
void no_fin_locking(void)
{
return;
}
static void _init_no_locking(struct locking_type *locking,
struct config_file *cf)
{
locking->lock_resource = no_lock_resource;
locking->fin_locking = no_fin_locking;
}
/*
* Select a locking type
*/
@ -92,7 +72,7 @@ int init_locking(int type, struct config_file *cf)
{
switch (type) {
case 0:
_init_no_locking(&_locking, cf);
init_no_locking(&_locking, cf);
log_print("WARNING: Locking disabled. Be careful! "
"This could corrupt your metadata.");
break;

2
lib/locking/locking_types.h
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@ -24,6 +24,8 @@ struct locking_type {
/*
* Locking types
*/
int init_no_locking(struct locking_type *locking, struct config_file *cf);
int init_file_locking(struct locking_type *locking, struct config_file *cf);
int init_external_locking(struct locking_type *locking, struct config_file *cf);

60
lib/locking/no_locking.c Normal file
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@ -0,0 +1,60 @@
/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*
*/
#include "log.h"
#include "locking.h"
#include "locking_types.h"
#include "lvm-string.h"
#include "activate.h"
#include <signal.h>
/*
* No locking
*/
static void _no_fin_locking(void)
{
return;
}
static int _no_lock_resource(struct cmd_context *cmd, const char *resource,
int flags)
{
switch (flags & LCK_SCOPE_MASK) {
case LCK_VG:
break;
case LCK_LV:
switch (flags & LCK_TYPE_MASK) {
case LCK_UNLOCK:
return lv_resume_if_active(cmd, resource);
case LCK_READ:
return lv_activate(cmd, resource);
case LCK_WRITE:
return lv_suspend_if_active(cmd, resource);
case LCK_EXCL:
return lv_deactivate(cmd, resource);
default:
break;
}
break;
default:
log_error("Unrecognised lock scope: %d",
flags & LCK_SCOPE_MASK);
return 0;
}
return 1;
}
int init_no_locking(struct locking_type *locking, struct config_file *cf)
{
locking->lock_resource = _no_lock_resource;
locking->fin_locking = _no_fin_locking;
return 1;
}