drivers/md/dm-ioctl.c

41  * name or uuid.
51 	char *uuid;
75  * Protects use of mdptr to obtain hash cell name and uuid from mapped device.
116 		c = strcmp(hc->uuid, str);
183 		c = strcmp(hc->uuid, new_hc->uuid);
216 static struct hash_cell *alloc_cell(const char *name, const char *uuid,
231 	if (!uuid)
232 		hc->uuid = NULL;
235 		hc->uuid = kstrdup(uuid, GFP_KERNEL);
236 		if (!hc->uuid) {
253 		kfree(hc->uuid);
259  * The kdev_t and uuid of a device can never change once it is
262 static int dm_hash_insert(const char *name, const char *uuid, struct mapped_device *md)
269 	cell = alloc_cell(name, uuid, md);
285 	if (uuid) {
286 		hc = __get_uuid_cell(uuid);
392  * Set the uuid of a hash_cell that isn't already set.
397 	hc->uuid = new_uuid;
455 		      change_uuid ? "uuid" : "name",
469 		      param->name, change_uuid ? "uuid " : "", new);
476 	 * Does this device already have a uuid?
478 	if (change_uuid && hc->uuid) {
479 		DMERR("Unable to change uuid of mapped device %s to %s "
480 		      "because uuid is already set to %s",
481 		      param->name, new, hc->uuid);
580 	val = hc->uuid ? hc->uuid : "";
608 		if (!filter_device(hc, param->name, param->uuid))
612 		if (param->flags & DM_UUID_FLAG && hc->uuid)
613 			needed += align_val(strlen(hc->uuid) + 1);
635 		if (!filter_device(hc, param->name, param->uuid))
651 			if (hc->uuid) {
653 				strcpy(uuid_ptr, hc->uuid);
654 				uuid_ptr = align_ptr(uuid_ptr + strlen(hc->uuid) + 1);
895 	r = dm_hash_insert(param->name, *param->uuid ? param->uuid : NULL, md);
918 	if (*param->uuid) {
920 			DMERR("Invalid ioctl structure: uuid %s, name %s, dev %llx",
921 			      param->uuid, param->name, (unsigned long long)param->dev);
925 		hc = __get_uuid_cell(param->uuid);
946 	 * Sneakily write in both the name and the uuid
950 	if (hc->uuid)
951 		strscpy(param->uuid, hc->uuid, sizeof(param->uuid));
953 		param->uuid[0] = '\0';
1054 		DMERR("Invalid new mapped device name or uuid string supplied.");
2035 	} else if (*param->uuid && *param->name) {
2036 		DMERR("only supply one of name or uuid, cmd(%u)", cmd);
2042 	param->uuid[DM_UUID_LEN - 1] = '\0';
2218  * dm_copy_name_and_uuid - Copy mapped device name & uuid into supplied buffers
2221  * @uuid: Buffer (size DM_UUID_LEN) for uuid or empty string if uuid not defined
2223 int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid)
2240 	if (uuid)
2241 		strcpy(uuid, hc->uuid ? : "");
2292 	r = dm_hash_insert(dmi->name, *dmi->uuid ? dmi->uuid : NULL, md);