static struct dm_uevent *dm_build_path_uevent(struct mapped_device *md,
struct dm_target *ti,
enum kobject_action action,
const char *dm_action,
const char *path,
unsigned nr_valid_paths)
{
struct dm_uevent *event;
event = dm_uevent_alloc(md);
if (!event) {
DMERR("%s: dm_uevent_alloc() failed", __FUNCTION__);
goto err_nomem;
}
event->action = action;
if (add_uevent_var_env(&event->ku_env, "DM_TARGET=%s",
ti->type->name)) {
DMERR("%s: add_uevent_var_env() for DM_TARGET failed",
__FUNCTION__);
goto err_add;
}
if (add_uevent_var_env(&event->ku_env, "DM_ACTION=%s", dm_action)) {
DMERR("%s: add_uevent_var_env() for DM_ACTION failed",
__FUNCTION__);
goto err_add;
}
if (add_uevent_var_env(&event->ku_env, "DM_SEQNUM=%u",
dm_next_uevent_seq(md))) {
DMERR("%s: add_uevent_var_env() for DM_SEQNUM failed",
__FUNCTION__);
goto err_add;
}
if (add_uevent_var_env(&event->ku_env, "DM_PATH=%s", path)) {
DMERR("%s: add_uevent_var_env() for DM_PATH failed",
__FUNCTION__);
goto err_add;
}
if (add_uevent_var_env(&event->ku_env, "DM_NR_VALID_PATHS=%d",
nr_valid_paths)) {
DMERR("%s: add_uevent_var_env() for DM_NR_VALID_PATHS failed",
__FUNCTION__);
goto err_add;
}
return event;
err_add:
dm_uevent_free(event);
err_nomem:
return ERR_PTR(-ENOMEM);
}
/**
* dm_send_uevents - send uevents for given list
*
* @events: list of events to send
* @kobj: kobject generating event
*
*/
void dm_send_uevents(struct list_head *events, struct kobject *kobj)
{
int r;
struct dm_uevent *event, *next;
list_for_each_entry_safe(event, next, events, elist) {
list_del_init(&event->elist);
/*
* When a device is being removed this copy fails and we
* discard these unsent events.
*/
if (dm_copy_name_and_uuid(event->md, event->name,
event->uuid)) {
DMINFO("%s: skipping sending uevent for lost device",
__func__);
goto uevent_free;
}
if (add_uevent_var_env(&event->ku_env, "DM_NAME=%s",
event->name)) {
DMERR("%s: add_uevent_var_env() for DM_NAME failed",
__FUNCTION__);
goto uevent_free;
}
if (add_uevent_var_env(&event->ku_env, "DM_UUID=%s",
event->uuid)) {
DMERR("%s: add_uevent_var_env() for DM_UUID failed",
__FUNCTION__);
goto uevent_free;
}
r = kobject_uevent_env(kobj, event->action, event->ku_env.envp);
if (r)
DMERR("%s: kobject_uevent_env failed", __FUNCTION__);
uevent_free:
dm_uevent_free(event);
}
/**
* dm_send_uevents - send uevents for given list
*
* @events: list of events to send
* @kobj: kobject generating event
*
*/
void dm_send_uevents(struct list_head *events, struct kobject *kobj)
{
int r;
struct dm_uevent *event, *next;
list_for_each_entry_safe(event, next, events, elist) {
list_del_init(&event->elist);
/*
* Need to call dm_copy_name_and_uuid from here for now.
* Context of previous var adds and locking used for
* hash_cell not compatable.
*/
if (dm_copy_name_and_uuid(event->md, event->name,
event->uuid)) {
DMERR("%s: dm_copy_name_and_uuid() failed",
__func__);
goto uevent_free;
}
if (add_uevent_var(&event->ku_env, "DM_NAME=%s", event->name)) {
DMERR("%s: add_uevent_var() for DM_NAME failed",
__func__);
goto uevent_free;
}
if (add_uevent_var(&event->ku_env, "DM_UUID=%s", event->uuid)) {
DMERR("%s: add_uevent_var() for DM_UUID failed",
__func__);
goto uevent_free;
}
r = kobject_uevent_env(kobj, event->action, event->ku_env.envp);
if (r)
DMERR("%s: kobject_uevent_env failed", __func__);
uevent_free:
dm_uevent_free(event);
}
