/*
* returns:
* 1 : match
* 0 : no match
* -1 : empty map
*/
extern int
dm_type(const char * name, char * type)
{
int r = 0;
struct dm_task *dmt;
uint64_t start, length;
char *target_type = NULL;
char *params;
if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
return 0;
if (!dm_task_set_name(dmt, name))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
/* Fetch 1st target */
dm_get_next_target(dmt, NULL, &start, &length,
&target_type, ¶ms);
if (!target_type)
r = -1;
else if (!strcmp(target_type, type))
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _error_device(const char *name, size_t size)
{
struct dm_task *dmt;
int r = 0;
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD)))
return 0;
if (!dm_task_set_name(dmt, name))
goto error;
if (!dm_task_add_target(dmt, UINT64_C(0), size, "error", ""))
goto error;
if (!dm_task_set_ro(dmt))
goto error;
if (!dm_task_no_open_count(dmt))
goto error;
if (!dm_task_run(dmt))
goto error;
if (!_dm_simple(DM_DEVICE_RESUME, name, 1)) {
_dm_simple(DM_DEVICE_CLEAR, name, 0);
goto error;
}
r = 1;
error:
dm_task_destroy(dmt);
return r;
}
extern int
dm_flush_maps (void)
{
int r = 0;
struct dm_task *dmt;
struct dm_names *names;
unsigned next = 0;
if (!(dmt = dm_task_create (DM_DEVICE_LIST)))
return 0;
dm_task_no_open_count(dmt);
if (!dm_task_run (dmt))
goto out;
if (!(names = dm_task_get_names (dmt)))
goto out;
if (!names->dev)
goto out;
do {
r |= dm_suspend_and_flush_map(names->name);
next = names->next;
names = (void *) names + next;
} while (next);
out:
dm_task_destroy (dmt);
return r;
}
int
dm_message(const char * mapname, char * message)
{
int r = 1;
struct dm_task *dmt;
if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
return 1;
if (!dm_task_set_name(dmt, mapname))
goto out;
if (!dm_task_set_sector(dmt, 0))
goto out;
if (!dm_task_set_message(dmt, message))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
r = 0;
out:
if (r)
condlog(0, "DM message failed [%s]", message);
dm_task_destroy(dmt);
return r;
}
static int _info_run(const char *name, const char *dlid, struct dm_info *info,
uint32_t *read_ahead, int mknodes, int with_open_count,
int with_read_ahead, uint32_t major, uint32_t minor)
{
int r = 0;
struct dm_task *dmt;
int dmtask;
dmtask = mknodes ? DM_DEVICE_MKNODES : DM_DEVICE_INFO;
if (!(dmt = _setup_task(mknodes ? name : NULL, dlid, 0, dmtask, major, minor)))
return_0;
if (!with_open_count)
if (!dm_task_no_open_count(dmt))
log_error("Failed to disable open_count");
if (!dm_task_run(dmt))
goto_out;
if (!dm_task_get_info(dmt, info))
goto_out;
if (with_read_ahead && info->exists) {
if (!dm_task_get_read_ahead(dmt, read_ahead))
goto_out;
} else if (read_ahead)
*read_ahead = DM_READ_AHEAD_NONE;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
int
dm_geteventnr (char *name)
{
struct dm_task *dmt;
struct dm_info info;
int event = -1;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return -1;
if (!dm_task_set_name(dmt, name))
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)
event = info.event_nr;
out:
dm_task_destroy(dmt);
return event;
}
extern int
dm_get_status(char * name, char * outstatus)
{
int r = 1;
struct dm_task *dmt;
uint64_t start, length;
char *target_type;
char *status;
if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
return 1;
if (!dm_task_set_name(dmt, name))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
/* Fetch 1st target */
dm_get_next_target(dmt, NULL, &start, &length,
&target_type, &status);
if (snprintf(outstatus, PARAMS_SIZE, "%s", status) <= PARAMS_SIZE)
r = 0;
out:
if (r)
condlog(0, "%s: error getting map status string", name);
dm_task_destroy(dmt);
return r;
}
extern int
dm_map_present (const 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;
}
int dm_addmap(int task, const char *name, const char *target,
const char *params, uint64_t size, int ro, const char *uuid,
int part, mode_t mode, uid_t uid, gid_t gid)
{
int r = 0;
struct dm_task *dmt;
char *prefixed_uuid = NULL;
#ifdef LIBDM_API_COOKIE
uint32_t cookie = 0;
uint16_t udev_flags = 0;
#endif
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;
if (ro && !dm_task_set_ro (dmt))
goto addout;
if (task == DM_DEVICE_CREATE && uuid) {
prefixed_uuid = make_prefixed_uuid(part, uuid);
if (prefixed_uuid == NULL)
goto addout;
if (!dm_task_set_uuid(dmt, prefixed_uuid))
goto addout;
}
if (!dm_task_set_mode(dmt, mode))
goto addout;
if (!dm_task_set_uid(dmt, uid))
goto addout;
if (!dm_task_set_gid(dmt, gid))
goto addout;
dm_task_no_open_count(dmt);
#ifdef LIBDM_API_COOKIE
if (!udev_sync)
udev_flags = DM_UDEV_DISABLE_LIBRARY_FALLBACK;
if (task == DM_DEVICE_CREATE &&
!dm_task_set_cookie(dmt, &cookie, udev_flags))
goto addout;
#endif
r = dm_task_run (dmt);
#ifdef LIBDM_API_COOKIE
if (task == DM_DEVICE_CREATE)
dm_udev_wait(cookie);
#endif
addout:
dm_task_destroy (dmt);
free(prefixed_uuid);
return r;
}
char *
dm_mapname(int major, int minor)
{
char * response = NULL;
const char *map;
struct dm_task *dmt;
int r;
int loop = MAX_WAIT * LOOPS_PER_SEC;
if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
return NULL;
if (!dm_task_set_major(dmt, major) ||
!dm_task_set_minor(dmt, minor))
goto bad;
dm_task_no_open_count(dmt);
/*
* device map might not be ready when we get here from
* daemon uev_trigger -> uev_add_map
*/
while (--loop) {
r = dm_task_run(dmt);
if (r)
break;
usleep(1000 * 1000 / LOOPS_PER_SEC);
}
if (!r) {
condlog(0, "%i:%i: timeout fetching map name", major, minor);
goto bad;
}
map = dm_task_get_name(dmt);
if (map && strlen(map))
response = STRDUP((char *)dm_task_get_name(dmt));
dm_task_destroy(dmt);
return response;
bad:
dm_task_destroy(dmt);
condlog(0, "%i:%i: error fetching map name", major, minor);
return NULL;
}
/* FIXME Interface must cope with multiple targets */
static int _status_run(const char *name, const char *uuid,
unsigned long long *s, unsigned long long *l,
char **t, uint32_t t_size, char **p, uint32_t p_size)
{
int r = 0;
struct dm_task *dmt;
struct dm_info info;
void *next = NULL;
uint64_t start, length;
char *type = NULL;
char *params = NULL;
if (!(dmt = _setup_task(name, uuid, 0, DM_DEVICE_STATUS, 0, 0)))
return_0;
if (!dm_task_no_open_count(dmt))
log_error("Failed to disable open_count");
if (!dm_task_run(dmt))
goto_out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto_out;
do {
next = dm_get_next_target(dmt, next, &start, &length,
&type, ¶ms);
if (type) {
*s = start;
*l = length;
/* Make sure things are null terminated */
strncpy(*t, type, t_size);
(*t)[t_size - 1] = '\0';
strncpy(*p, params, p_size);
(*p)[p_size - 1] = '\0';
r = 1;
/* FIXME Cope with multiple targets! */
break;
}
} while (next);
out:
dm_task_destroy(dmt);
return r;
}
int
dm_drv_version (unsigned int * version, char * str)
{
int r = 2;
struct dm_task *dmt;
struct dm_versions *target;
struct dm_versions *last_target;
unsigned int *v;
version[0] = 0;
version[1] = 0;
version[2] = 0;
if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
return 1;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt)) {
condlog(0, "Can not communicate with kernel DM");
goto out;
}
target = dm_task_get_versions(dmt);
do {
last_target = target;
if (!strncmp(str, target->name, strlen(str))) {
r = 1;
break;
}
target = (void *) target + target->next;
} while (last_target != target);
if (r == 2) {
condlog(0, "DM %s kernel driver not loaded", str);
goto out;
}
v = target->version;
version[0] = v[0];
version[1] = v[1];
version[2] = v[2];
r = 0;
out:
dm_task_destroy(dmt);
return r;
}
static int
virStorageBackendIsMultipath(const char *devname)
{
int ret = 0;
struct dm_task *dmt = NULL;
void *next = NULL;
uint64_t start, length;
char *target_type = NULL;
char *params = NULL;
dmt = dm_task_create(DM_DEVICE_TABLE);
if (dmt == NULL) {
ret = -1;
goto out;
}
if (dm_task_set_name(dmt, devname) == 0) {
ret = -1;
goto out;
}
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt)) {
ret = -1;
goto out;
}
dm_get_next_target(dmt, next, &start, &length, &target_type, ¶ms);
if (target_type == NULL) {
ret = -1;
goto out;
}
if (STREQ(target_type, "multipath")) {
ret = 1;
}
out:
if (dmt != NULL) {
dm_task_destroy(dmt);
}
return ret;
}
int lv_has_target_type(struct dm_pool *mem, struct logical_volume *lv,
const char *layer, const char *target_type)
{
int r = 0;
char *dlid;
struct dm_task *dmt;
struct dm_info info;
void *next = NULL;
uint64_t start, length;
char *type = NULL;
char *params = NULL;
if (!(dlid = build_dm_uuid(mem, lv->lvid.s, layer)))
return_0;
if (!(dmt = _setup_task(NULL, dlid, 0,
DM_DEVICE_STATUS, 0, 0)))
return_0;
if (!dm_task_no_open_count(dmt))
log_error("Failed to disable open_count");
if (!dm_task_run(dmt))
goto_out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto_out;
do {
next = dm_get_next_target(dmt, next, &start, &length,
&type, ¶ms);
if (type && strncmp(type, target_type,
strlen(target_type)) == 0) {
if (info.live_table)
r = 1;
break;
}
} while (next);
out:
dm_task_destroy(dmt);
return r;
}
int
dm_get_info (char * mapname, struct dm_info ** dmi)
{
int r = 1;
struct dm_task *dmt = NULL;
if (!mapname)
return 1;
if (!*dmi)
*dmi = alloc_dminfo();
if (!*dmi)
return 1;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
goto out;
if (!dm_task_set_name(dmt, mapname))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, *dmi))
goto out;
r = 0;
out:
if (r) {
memset(*dmi, 0, sizeof(struct dm_info));
FREE(*dmi);
*dmi = NULL;
}
if (dmt)
dm_task_destroy(dmt);
return r;
}
extern int
dm_is_mpath(const char * name)
{
int r = 0;
struct dm_task *dmt;
struct dm_info info;
uint64_t start, length;
char *target_type = NULL;
char *params;
const char *uuid;
if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
return 0;
if (!dm_task_set_name(dmt, name))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto out;
uuid = dm_task_get_uuid(dmt);
if (!uuid || strncmp(uuid, UUID_PREFIX, UUID_PREFIX_LEN) != 0)
goto out;
/* Fetch 1st target */
dm_get_next_target(dmt, NULL, &start, &length, &target_type, ¶ms);
if (!target_type || strcmp(target_type, TGT_MPATH) != 0)
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
extern int
dm_get_map(const char * name, unsigned long long * size, char * outparams)
{
int r = 1;
struct dm_task *dmt;
uint64_t start, length;
char *target_type = NULL;
char *params = NULL;
if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
return 1;
if (!dm_task_set_name(dmt, name))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
/* Fetch 1st target */
dm_get_next_target(dmt, NULL, &start, &length,
&target_type, ¶ms);
if (size)
*size = length;
if (!outparams) {
r = 0;
goto out;
}
if (snprintf(outparams, PARAMS_SIZE, "%s", params) <= PARAMS_SIZE)
r = 0;
out:
dm_task_destroy(dmt);
return r;
}
static int
dm_simplecmd (int task, const char *name, int no_flush, int need_sync, uint16_t udev_flags, int deferred_remove) {
int r = 0;
int udev_wait_flag = (need_sync && (task == DM_DEVICE_RESUME ||
task == DM_DEVICE_REMOVE));
uint32_t cookie = 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);
dm_task_skip_lockfs(dmt); /* for DM_DEVICE_RESUME */
#ifdef LIBDM_API_FLUSH
if (no_flush)
dm_task_no_flush(dmt); /* for DM_DEVICE_SUSPEND/RESUME */
#endif
#ifdef LIBDM_API_DEFERRED
if (do_deferred(deferred_remove))
dm_task_deferred_remove(dmt);
#endif
if (udev_wait_flag &&
!dm_task_set_cookie(dmt, &cookie,
DM_UDEV_DISABLE_LIBRARY_FALLBACK | udev_flags))
goto out;
r = dm_task_run (dmt);
if (udev_wait_flag)
dm_udev_wait(cookie);
out:
dm_task_destroy (dmt);
return r;
}
int dm_simplecmd(int task, const char *name, int no_flush, uint16_t udev_flags)
{
int r = 0;
int udev_wait_flag = (task == DM_DEVICE_RESUME ||
task == DM_DEVICE_REMOVE);
#ifdef LIBDM_API_COOKIE
uint32_t cookie = 0;
#endif
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);
dm_task_skip_lockfs(dmt);
if (no_flush)
dm_task_no_flush(dmt);
#ifdef LIBDM_API_COOKIE
if (!udev_sync)
udev_flags |= DM_UDEV_DISABLE_LIBRARY_FALLBACK;
if (udev_wait_flag && !dm_task_set_cookie(dmt, &cookie, udev_flags))
goto out;
#endif
r = dm_task_run(dmt);
#ifdef LIBDM_API_COOKIE
if (udev_wait_flag)
dm_udev_wait(cookie);
#endif
out:
dm_task_destroy(dmt);
return r;
}
static int
virStorageBackendGetMaps(virStoragePoolObjPtr pool)
{
int retval = 0;
struct dm_task *dmt = NULL;
struct dm_names *names = NULL;
if (!(dmt = dm_task_create(DM_DEVICE_LIST))) {
retval = 1;
goto out;
}
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt)) {
retval = 1;
goto out;
}
if (!(names = dm_task_get_names(dmt))) {
retval = 1;
goto out;
}
if (!names->dev) {
/* No devices found */
goto out;
}
virStorageBackendCreateVols(pool, names);
out:
if (dmt != NULL) {
dm_task_destroy (dmt);
}
return retval;
}
static int dm_map_present(char *str, char **uuid)
{
int r = 0;
struct dm_task *dmt;
const char *uuidtmp;
struct dm_info info;
if (uuid)
*uuid = NULL;
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)
goto out;
r = 1;
if (uuid) {
uuidtmp = dm_task_get_uuid(dmt);
if (uuidtmp && strlen(uuidtmp))
*uuid = strdup(uuidtmp);
}
out:
dm_task_destroy(dmt);
return r;
}
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;
}
static int
do_foreach_partmaps (const char * mapname,
int (*partmap_func)(const char *, void *),
void *data)
{
struct dm_task *dmt;
struct dm_names *names;
unsigned next = 0;
char params[PARAMS_SIZE];
unsigned long long size;
char dev_t[32];
int r = 1;
if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
return 1;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
if (!(names = dm_task_get_names(dmt)))
goto out;
if (!names->dev) {
r = 0; /* this is perfectly valid */
goto out;
}
if (dm_dev_t(mapname, &dev_t[0], 32))
goto out;
do {
if (
/*
* if devmap target is "linear"
*/
(dm_type(names->name, TGT_PART) > 0) &&
/*
* and both uuid end with same suffix starting
* at UUID_PREFIX
*/
(!dm_compare_uuid(names->name, mapname)) &&
/*
* and we can fetch the map table from the kernel
*/
!dm_get_map(names->name, &size, ¶ms[0]) &&
/*
* and the table maps over the multipath map
*/
strstr(params, dev_t)
) {
if (partmap_func(names->name, data) != 0)
goto out;
}
next = names->next;
names = (void *) names + next;
} while (next);
r = 0;
out:
dm_task_destroy (dmt);
return r;
}
/*
* returns the reschedule delay
* negative means *stop*
*/
int waiteventloop (struct event_thread *waiter)
{
sigset_t set;
int event_nr;
int r;
if (!waiter->event_nr)
waiter->event_nr = dm_geteventnr(waiter->mapname);
if (!(waiter->dmt = dm_task_create(DM_DEVICE_WAITEVENT))) {
condlog(0, "%s: devmap event #%i dm_task_create error",
waiter->mapname, waiter->event_nr);
return 1;
}
if (!dm_task_set_name(waiter->dmt, waiter->mapname)) {
condlog(0, "%s: devmap event #%i dm_task_set_name error",
waiter->mapname, waiter->event_nr);
dm_task_destroy(waiter->dmt);
return 1;
}
if (waiter->event_nr && !dm_task_set_event_nr(waiter->dmt,
waiter->event_nr)) {
condlog(0, "%s: devmap event #%i dm_task_set_event_nr error",
waiter->mapname, waiter->event_nr);
dm_task_destroy(waiter->dmt);
return 1;
}
dm_task_no_open_count(waiter->dmt);
/* accept wait interruption */
set = unblock_signals();
/* wait */
r = dm_task_run(waiter->dmt);
/* wait is over : event or interrupt */
pthread_sigmask(SIG_SETMASK, &set, NULL);
if (!r) /* wait interrupted by signal */
return -1;
dm_task_destroy(waiter->dmt);
waiter->dmt = NULL;
waiter->event_nr++;
/*
* upon event ...
*/
while (1) {
condlog(3, "%s: devmap event #%i",
waiter->mapname, waiter->event_nr);
/*
* event might be :
*
* 1) a table reload, which means our mpp structure is
* obsolete : refresh it through update_multipath()
* 2) a path failed by DM : mark as such through
* update_multipath()
* 3) map has gone away : stop the thread.
* 4) a path reinstate : nothing to do
* 5) a switch group : nothing to do
*/
pthread_cleanup_push(cleanup_lock, &waiter->vecs->lock);
lock(waiter->vecs->lock);
r = update_multipath(waiter->vecs, waiter->mapname);
lock_cleanup_pop(waiter->vecs->lock);
if (r) {
condlog(2, "%s: event checker exit",
waiter->mapname);
return -1; /* stop the thread */
}
event_nr = dm_geteventnr(waiter->mapname);
if (waiter->event_nr == event_nr)
return 1; /* upon problem reschedule 1s later */
waiter->event_nr = event_nr;
}
return -1; /* never reach there */
}
static int
dm_addmap (int task, const char *target, struct multipath *mpp,
char * params, int ro) {
int r = 0;
struct dm_task *dmt;
char *prefixed_uuid = NULL;
uint32_t cookie = 0;
if (!(dmt = dm_task_create (task)))
return 0;
if (!dm_task_set_name (dmt, mpp->alias))
goto addout;
if (!dm_task_add_target (dmt, 0, mpp->size, target, params))
goto addout;
if (ro)
dm_task_set_ro(dmt);
if (task == DM_DEVICE_CREATE) {
if (strlen(mpp->wwid) > 0) {
prefixed_uuid = MALLOC(UUID_PREFIX_LEN +
strlen(mpp->wwid) + 1);
if (!prefixed_uuid) {
condlog(0, "cannot create prefixed uuid : %s",
strerror(errno));
goto addout;
}
sprintf(prefixed_uuid, UUID_PREFIX "%s", mpp->wwid);
if (!dm_task_set_uuid(dmt, prefixed_uuid))
goto freeout;
}
dm_task_skip_lockfs(dmt);
#ifdef LIBDM_API_FLUSH
dm_task_no_flush(dmt);
#endif
}
if (mpp->attribute_flags & (1 << ATTR_MODE) &&
!dm_task_set_mode(dmt, mpp->mode))
goto freeout;
if (mpp->attribute_flags & (1 << ATTR_UID) &&
!dm_task_set_uid(dmt, mpp->uid))
goto freeout;
if (mpp->attribute_flags & (1 << ATTR_GID) &&
!dm_task_set_gid(dmt, mpp->gid))
goto freeout;
condlog(4, "%s: %s [0 %llu %s %s]", mpp->alias,
task == DM_DEVICE_RELOAD ? "reload" : "addmap", mpp->size,
target, params);
dm_task_no_open_count(dmt);
if (task == DM_DEVICE_CREATE &&
!dm_task_set_cookie(dmt, &cookie,
DM_UDEV_DISABLE_LIBRARY_FALLBACK))
goto freeout;
r = dm_task_run (dmt);
if (task == DM_DEVICE_CREATE)
dm_udev_wait(cookie);
freeout:
if (prefixed_uuid)
FREE(prefixed_uuid);
addout:
dm_task_destroy (dmt);
return r;
}
static int _percent_run(struct dev_manager *dm, const char *name,
const char *dlid,
const char *target_type, int wait,
const struct logical_volume *lv, float *percent,
percent_range_t *overall_percent_range,
uint32_t *event_nr, int fail_if_percent_unsupported)
{
int r = 0;
struct dm_task *dmt;
struct dm_info info;
void *next = NULL;
uint64_t start, length;
char *type = NULL;
char *params = NULL;
const struct dm_list *segh = &lv->segments;
struct lv_segment *seg = NULL;
struct segment_type *segtype;
percent_range_t percent_range = 0, combined_percent_range = 0;
int first_time = 1;
uint64_t total_numerator = 0, total_denominator = 0;
*percent = -1;
*overall_percent_range = PERCENT_INVALID;
if (!(dmt = _setup_task(name, dlid, event_nr,
wait ? DM_DEVICE_WAITEVENT : DM_DEVICE_STATUS, 0, 0)))
return_0;
if (!dm_task_no_open_count(dmt))
log_error("Failed to disable open_count");
if (!dm_task_run(dmt))
goto_out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto_out;
if (event_nr)
*event_nr = info.event_nr;
do {
next = dm_get_next_target(dmt, next, &start, &length, &type,
¶ms);
if (lv) {
if (!(segh = dm_list_next(&lv->segments, segh))) {
log_error("Number of segments in active LV %s "
"does not match metadata", lv->name);
goto out;
}
seg = dm_list_item(segh, struct lv_segment);
}
if (!type || !params)
continue;
if (!(segtype = get_segtype_from_string(dm->cmd, target_type)))
continue;
if (strcmp(type, target_type)) {
/* If kernel's type isn't an exact match is it compatible? */
if (!segtype->ops->target_status_compatible ||
!segtype->ops->target_status_compatible(type))
continue;
}
if (segtype->ops->target_percent &&
!segtype->ops->target_percent(&dm->target_state,
&percent_range, dm->mem,
dm->cmd, seg, params,
&total_numerator,
&total_denominator))
goto_out;
if (first_time) {
combined_percent_range = percent_range;
first_time = 0;
} else
combined_percent_range =
_combine_percent_ranges(combined_percent_range,
percent_range);
} while (next);
if (lv && (segh = dm_list_next(&lv->segments, segh))) {
log_error("Number of segments in active LV %s does not "
"match metadata", lv->name);
goto out;
}
if (total_denominator) {
*percent = (float) total_numerator *100 / total_denominator;
*overall_percent_range = combined_percent_range;
} else {
*percent = 100;
if (first_time) {
/* above ->target_percent() was not executed! */
/* FIXME why return PERCENT_100 et. al. in this case? */
*overall_percent_range = PERCENT_100;
if (fail_if_percent_unsupported)
goto_out;
} else
*overall_percent_range = combined_percent_range;
}
log_debug("LV percent: %f", *percent);
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
int
dm_get_maps (vector mp)
{
struct multipath * mpp;
int r = 1;
struct dm_task *dmt;
struct dm_names *names;
unsigned next = 0;
if (!mp)
return 1;
if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
return 1;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
if (!(names = dm_task_get_names(dmt)))
goto out;
if (!names->dev) {
r = 0; /* this is perfectly valid */
goto out;
}
do {
if (!dm_is_mpath(names->name))
goto next;
mpp = alloc_multipath();
if (!mpp)
goto out;
mpp->alias = STRDUP(names->name);
if (!mpp->alias)
goto out1;
if (dm_get_map(names->name, &mpp->size, NULL))
goto out1;
dm_get_uuid(names->name, mpp->wwid);
dm_get_info(names->name, &mpp->dmi);
if (!vector_alloc_slot(mp))
goto out1;
vector_set_slot(mp, mpp);
mpp = NULL;
next:
next = names->next;
names = (void *) names + next;
} while (next);
r = 0;
goto out;
out1:
free_multipath(mpp, KEEP_PATHS);
out:
dm_task_destroy (dmt);
return r;
}
