s390/block/dasd_devmap.c

48 	struct dasd_copy_relation *copy;
602 		dev_warn(&device->cdev->dev, "Unable to query copy relation status\n");
611 		dev_warn(&device->cdev->dev, "Error during copy relation status query\n");
646  * check the consistency of a specified copy relation by checking
649  *   - is the given device part of a copy pair setup
658 					   struct dasd_copy_relation *copy)
671 		dev_warn(&device->cdev->dev, "Device not part of a copy relation\n");
684 				 "Primary device %s does not match copy pair status primary device %04x\n",
698 				 "Secondary device %s does not match copy pair status secondary device %04x\n",
707 	 * the current device has to be part of the copy relation of all
708 	 * entries to prevent misrouted IO to another copy pair
711 		if (entry == &copy->entry[j])
714 			tmp_dev = copy->entry[j].device;
734 /* delete device from copy relation entry */
737 	struct dasd_copy_relation *copy;
740 	if (!device->copy)
743 	copy = device->copy;
745 		if (copy->entry[i].device == device)
746 			copy->entry[i].device = NULL;
749 	device->copy = NULL;
753  * read all required information for a copy relation setup and setup the device
761 	struct dasd_copy_relation *copy;
774 	copy = devmap->copy;
775 	/* no copy pair setup for this device */
776 	if (!copy)
791 		dev_warn(&device->cdev->dev, "Copy pair setup requested for device not in copy relation\n");
797 		if (copy->entry[i].configured &&
799 			    copy->entry[i].busid, DASD_BUS_ID_SIZE) == 0) {
800 			entry = &copy->entry[i];
809 	/* check if the copy relation is valid */
810 	if (dasd_devmap_check_copy_relation(device, entry, data, copy)) {
817 	copy->entry[i].device = device;
818 	device->copy = copy;
858 	/* Removve copy relation */
2037  * print copy relation in the form
2045 	struct dasd_copy_relation *copy;
2054 	if (!devmap->copy)
2057 	copy = devmap->copy;
2060 		if (copy->entry[i].configured && copy->entry[i].primary) {
2061 			strscpy(prim_busid, copy->entry[i].busid,
2071 		if (copy->entry[i].configured && !copy->entry[i].primary)
2073 					     copy->entry[i].busid);
2082 					 struct dasd_copy_relation *copy,
2090 		if (copy->entry[i].configured &&
2091 		    strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0)
2094 		if (!copy->entry[i].configured)
2100 	copy->entry[i].configured = true;
2101 	strscpy(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE);
2103 		copy->active = &copy->entry[i];
2104 		copy->entry[i].primary = true;
2106 	if (!devmap->copy)
2107 		devmap->copy = copy;
2112 static void dasd_devmap_del_copy_relation(struct dasd_copy_relation *copy,
2120 		if (copy->entry[i].configured &&
2121 		    strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0)
2124 	if (i == DASD_CP_ENTRIES || !copy->entry[i].configured) {
2129 	copy->entry[i].configured = false;
2130 	memset(copy->entry[i].busid, 0, DASD_BUS_ID_SIZE);
2131 	if (copy->active == &copy->entry[i]) {
2132 		copy->active = NULL;
2133 		copy->entry[i].primary = false;
2140 	struct dasd_copy_relation *copy;
2149 	if (!devmap->copy)
2152 	copy = devmap->copy;
2155 		if (!copy->entry[i].configured)
2158 		if (copy->entry[i].device == copy->active->device)
2161 		if (copy->entry[i].device)
2166 		if (strlen(copy->entry[i].busid) == 0)
2168 		if (copy->entry[i].device) {
2169 			dasd_put_device(copy->entry[i].device);
2170 			copy->entry[i].device->copy = NULL;
2171 			copy->entry[i].device = NULL;
2173 		devmap = dasd_find_busid_locked(copy->entry[i].busid);
2174 		devmap->copy = NULL;
2175 		memset(copy->entry[i].busid, 0, DASD_BUS_ID_SIZE);
2177 	kfree(copy);
2185  * parse BUSIDs from a copy pair
2230 	struct dasd_copy_relation *copy;
2259 	/* setting copy relation is only allowed for offline secondary */
2263 	if (prim_devmap->copy) {
2264 		copy = prim_devmap->copy;
2265 	} else if (sec_devmap->copy) {
2266 		copy = sec_devmap->copy;
2268 		copy = kzalloc(sizeof(*copy), GFP_KERNEL);
2269 		if (!copy)
2273 	rc = dasd_devmap_set_copy_relation(prim_devmap, copy, prim_busid, true);
2278 	rc = dasd_devmap_set_copy_relation(sec_devmap, copy, sec_busid, false);
2286 	if (prim_devmap->device && !prim_devmap->device->copy) {
2297 		dasd_devmap_del_copy_relation(copy, prim_busid);
2298 		dasd_devmap_del_copy_relation(copy, sec_busid);
2311 	struct dasd_copy_relation *copy;
2319 	if (!device->copy) {
2323 	copy = device->copy;
2325 	if (copy->active->device == device) {
2330 		if (copy->entry[i].device == device) {