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/*
* Copyright (c) 2004, 2005 Christophe Varoqui
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libdevmapper.h>
#include <ctype.h>
#include <linux/kdev_t.h>
extern int
dm_prereq (char * str, int x, int y, int z)
{
int r = 1;
struct dm_task *dmt;
struct dm_versions *target;
struct dm_versions *last_target;
if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
return 1;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
target = dm_task_get_versions(dmt);
/* Fetch targets and print 'em */
do {
last_target = target;
if (!strncmp(str, target->name, strlen(str)) &&
/* dummy prereq on multipath version */
target->version[0] >= x &&
target->version[1] >= y &&
target->version[2] >= z
)
r = 0;
target = (void *) target + target->next;
} while (last_target != target);
out:
dm_task_destroy(dmt);
return r;
}
extern int
dm_simplecmd (int task, const char *name) {
int r = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create(task)))
return 0;
if (!dm_task_set_name(dmt, name))
goto out;
dm_task_no_open_count(dmt);
r = dm_task_run(dmt);
out:
dm_task_destroy(dmt);
return r;
}
extern int
dm_addmap (int task, const char *name, const char *target,
const char *params, unsigned long size) {
int r = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create (task)))
return 0;
if (!dm_task_set_name (dmt, name))
goto addout;
if (!dm_task_add_target (dmt, 0, size, target, params))
goto addout;
dm_task_no_open_count(dmt);
r = dm_task_run (dmt);
addout:
dm_task_destroy (dmt);
return r;
}
extern int
dm_map_present (char * str)
{
int r = 0;
struct dm_task *dmt;
struct dm_info info;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return 0;
if (!dm_task_set_name(dmt, str))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info))
goto out;
if (info.exists)
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
const char *
dm_mapname(int major, int minor)
{
struct dm_task *dmt;
const char *mapname;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return NULL;
dm_task_no_open_count(dmt);
dm_task_set_major(dmt, major);
dm_task_set_minor(dmt, minor);
if (!dm_task_run(dmt))
goto out;
mapname = strdup(dm_task_get_name(dmt));
out:
dm_task_destroy(dmt);
return mapname;
}
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