diff options
Diffstat (limited to 'drivers/s390')
34 files changed, 1251 insertions, 289 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index ea82821599f6..5a6d9c15395f 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -41,15 +41,6 @@ #define DASD_DIAG_MOD "dasd_diag_mod" -static unsigned int queue_depth = 32; -static unsigned int nr_hw_queues = 4; - -module_param(queue_depth, uint, 0444); -MODULE_PARM_DESC(queue_depth, "Default queue depth for new DASD devices"); - -module_param(nr_hw_queues, uint, 0444); -MODULE_PARM_DESC(nr_hw_queues, "Default number of hardware queues for new DASD devices"); - /* * SECTION: exported variables of dasd.c */ @@ -68,8 +59,6 @@ MODULE_LICENSE("GPL"); /* * SECTION: prototypes for static functions of dasd.c */ -static int dasd_alloc_queue(struct dasd_block *); -static void dasd_free_queue(struct dasd_block *); static int dasd_flush_block_queue(struct dasd_block *); static void dasd_device_tasklet(unsigned long); static void dasd_block_tasklet(unsigned long); @@ -198,21 +187,11 @@ EXPORT_SYMBOL_GPL(dasd_free_block); */ static int dasd_state_new_to_known(struct dasd_device *device) { - int rc; - /* * As long as the device is not in state DASD_STATE_NEW we want to * keep the reference count > 0. */ dasd_get_device(device); - - if (device->block) { - rc = dasd_alloc_queue(device->block); - if (rc) { - dasd_put_device(device); - return rc; - } - } device->state = DASD_STATE_KNOWN; return 0; } @@ -226,9 +205,6 @@ static int dasd_state_known_to_new(struct dasd_device *device) dasd_eer_disable(device); device->state = DASD_STATE_NEW; - if (device->block) - dasd_free_queue(device->block); - /* Give up reference we took in dasd_state_new_to_known. */ dasd_put_device(device); return 0; @@ -1591,9 +1567,8 @@ void dasd_generic_handle_state_change(struct dasd_device *device) dasd_schedule_device_bh(device); if (device->block) { dasd_schedule_block_bh(device->block); - if (device->block->request_queue) - blk_mq_run_hw_queues(device->block->request_queue, - true); + if (device->block->gdp) + blk_mq_run_hw_queues(device->block->gdp->queue, true); } } EXPORT_SYMBOL_GPL(dasd_generic_handle_state_change); @@ -2691,7 +2666,7 @@ static void dasd_block_timeout(struct timer_list *t) dasd_device_remove_stop_bits(block->base, DASD_STOPPED_PENDING); spin_unlock_irqrestore(get_ccwdev_lock(block->base->cdev), flags); dasd_schedule_block_bh(block); - blk_mq_run_hw_queues(block->request_queue, true); + blk_mq_run_hw_queues(block->gdp->queue, true); } /* @@ -3239,7 +3214,7 @@ static void dasd_request_done(struct request *req) blk_mq_run_hw_queues(req->q, true); } -static struct blk_mq_ops dasd_mq_ops = { +struct blk_mq_ops dasd_mq_ops = { .queue_rq = do_dasd_request, .complete = dasd_request_done, .timeout = dasd_times_out, @@ -3247,45 +3222,6 @@ static struct blk_mq_ops dasd_mq_ops = { .exit_hctx = dasd_exit_hctx, }; -/* - * Allocate and initialize request queue and default I/O scheduler. - */ -static int dasd_alloc_queue(struct dasd_block *block) -{ - int rc; - - block->tag_set.ops = &dasd_mq_ops; - block->tag_set.cmd_size = sizeof(struct dasd_ccw_req); - block->tag_set.nr_hw_queues = nr_hw_queues; - block->tag_set.queue_depth = queue_depth; - block->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; - block->tag_set.numa_node = NUMA_NO_NODE; - - rc = blk_mq_alloc_tag_set(&block->tag_set); - if (rc) - return rc; - - block->request_queue = blk_mq_init_queue(&block->tag_set); - if (IS_ERR(block->request_queue)) - return PTR_ERR(block->request_queue); - - block->request_queue->queuedata = block; - - return 0; -} - -/* - * Deactivate and free request queue. - */ -static void dasd_free_queue(struct dasd_block *block) -{ - if (block->request_queue) { - blk_mq_destroy_queue(block->request_queue); - blk_mq_free_tag_set(&block->tag_set); - block->request_queue = NULL; - } -} - static int dasd_open(struct block_device *bdev, fmode_t mode) { struct dasd_device *base; @@ -3762,10 +3698,9 @@ int dasd_generic_path_operational(struct dasd_device *device) dasd_schedule_device_bh(device); if (device->block) { dasd_schedule_block_bh(device->block); - if (device->block->request_queue) - blk_mq_run_hw_queues(device->block->request_queue, - true); - } + if (device->block->gdp) + blk_mq_run_hw_queues(device->block->gdp->queue, true); + } if (!device->stopped) wake_up(&generic_waitq); @@ -3916,8 +3851,8 @@ void dasd_generic_space_avail(struct dasd_device *device) if (device->block) { dasd_schedule_block_bh(device->block); - if (device->block->request_queue) - blk_mq_run_hw_queues(device->block->request_queue, true); + if (device->block->gdp) + blk_mq_run_hw_queues(device->block->gdp->queue, true); } if (!device->stopped) wake_up(&generic_waitq); @@ -3927,7 +3862,7 @@ EXPORT_SYMBOL_GPL(dasd_generic_space_avail); /* * clear active requests and requeue them to block layer if possible */ -static int dasd_generic_requeue_all_requests(struct dasd_device *device) +int dasd_generic_requeue_all_requests(struct dasd_device *device) { struct list_head requeue_queue; struct dasd_ccw_req *cqr, *n; @@ -4001,6 +3936,7 @@ static int dasd_generic_requeue_all_requests(struct dasd_device *device) dasd_schedule_device_bh(device); return rc; } +EXPORT_SYMBOL_GPL(dasd_generic_requeue_all_requests); static void do_requeue_requests(struct work_struct *work) { diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c index 299001ad9a32..81d283b3cd3b 100644 --- a/drivers/s390/block/dasd_3990_erp.c +++ b/drivers/s390/block/dasd_3990_erp.c @@ -1050,6 +1050,11 @@ dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense) dev_err(&device->cdev->dev, "An I/O request was rejected" " because writing is inhibited\n"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); + } else if (sense[7] & SNS7_INVALID_ON_SEC) { + dev_err(&device->cdev->dev, "An I/O request was rejected on a copy pair secondary device\n"); + /* suppress dump of sense data for this error */ + set_bit(DASD_CQR_SUPPRESS_CR, &erp->refers->flags); + erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); } else { /* fatal error - set status to FAILED internal error 09 - Command Reject */ diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c index dc78a523a69f..b6b938aa6615 100644 --- a/drivers/s390/block/dasd_alias.c +++ b/drivers/s390/block/dasd_alias.c @@ -675,12 +675,12 @@ int dasd_alias_remove_device(struct dasd_device *device) struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device) { struct dasd_eckd_private *alias_priv, *private = base_device->private; - struct alias_pav_group *group = private->pavgroup; struct alias_lcu *lcu = private->lcu; struct dasd_device *alias_device; + struct alias_pav_group *group; unsigned long flags; - if (!group || !lcu) + if (!lcu) return NULL; if (lcu->pav == NO_PAV || lcu->flags & (NEED_UAC_UPDATE | UPDATE_PENDING)) @@ -697,6 +697,11 @@ struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device) } spin_lock_irqsave(&lcu->lock, flags); + group = private->pavgroup; + if (!group) { + spin_unlock_irqrestore(&lcu->lock, flags); + return NULL; + } alias_device = group->next; if (!alias_device) { if (list_empty(&group->aliaslist)) { diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 811e79c9f59c..cb83f81da416 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -26,7 +26,6 @@ /* This is ugly... */ #define PRINTK_HEADER "dasd_devmap:" -#define DASD_BUS_ID_SIZE 20 #define DASD_MAX_PARAMS 256 #include "dasd_int.h" @@ -50,6 +49,7 @@ struct dasd_devmap { unsigned int devindex; unsigned short features; struct dasd_device *device; + struct dasd_copy_relation *copy; }; /* @@ -130,7 +130,7 @@ __setup ("dasd=", dasd_call_setup); /* * Read a device busid/devno from a string. */ -static int __init dasd_busid(char *str, int *id0, int *id1, int *devno) +static int dasd_busid(char *str, int *id0, int *id1, int *devno) { unsigned int val; char *tok; @@ -426,7 +426,7 @@ dasd_add_busid(const char *bus_id, int features) if (!devmap) { /* This bus_id is new. */ new->devindex = dasd_max_devindex++; - strlcpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE); + strscpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE); new->features = features; new->device = NULL; list_add(&new->list, &dasd_hashlists[hash]); @@ -438,16 +438,12 @@ dasd_add_busid(const char *bus_id, int features) return devmap; } -/* - * Find devmap for device with given bus_id. - */ static struct dasd_devmap * -dasd_find_busid(const char *bus_id) +dasd_find_busid_locked(const char *bus_id) { struct dasd_devmap *devmap, *tmp; int hash; - spin_lock(&dasd_devmap_lock); devmap = ERR_PTR(-ENODEV); hash = dasd_hash_busid(bus_id); list_for_each_entry(tmp, &dasd_hashlists[hash], list) { @@ -456,6 +452,19 @@ dasd_find_busid(const char *bus_id) break; } } + return devmap; +} + +/* + * Find devmap for device with given bus_id. + */ +static struct dasd_devmap * +dasd_find_busid(const char *bus_id) +{ + struct dasd_devmap *devmap; + + spin_lock(&dasd_devmap_lock); + devmap = dasd_find_busid_locked(bus_id); spin_unlock(&dasd_devmap_lock); return devmap; } @@ -585,6 +594,238 @@ dasd_create_device(struct ccw_device *cdev) } /* + * allocate a PPRC data structure and call the discipline function to fill + */ +static int dasd_devmap_get_pprc_status(struct dasd_device *device, + struct dasd_pprc_data_sc4 **data) +{ + struct dasd_pprc_data_sc4 *temp; + + if (!device->discipline || !device->discipline->pprc_status) { + dev_warn(&device->cdev->dev, "Unable to query copy relation status\n"); + return -EOPNOTSUPP; + } + temp = kzalloc(sizeof(*temp), GFP_KERNEL); + if (!temp) + return -ENOMEM; + + /* get PPRC information from storage */ + if (device->discipline->pprc_status(device, temp)) { + dev_warn(&device->cdev->dev, "Error during copy relation status query\n"); + kfree(temp); + return -EINVAL; + } + *data = temp; + + return 0; +} + +/* + * find an entry in a PPRC device_info array by a given UID + * depending on the primary/secondary state of the device it has to be + * matched with the respective fields + */ +static int dasd_devmap_entry_from_pprc_data(struct dasd_pprc_data_sc4 *data, + struct dasd_uid uid, + bool primary) +{ + int i; + + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (primary) { + if (data->dev_info[i].prim_cu_ssid == uid.ssid && + data->dev_info[i].primary == uid.real_unit_addr) + return i; + } else { + if (data->dev_info[i].sec_cu_ssid == uid.ssid && + data->dev_info[i].secondary == uid.real_unit_addr) + return i; + } + } + return -1; +} + +/* + * check the consistency of a specified copy relation by checking + * the following things: + * + * - is the given device part of a copy pair setup + * - does the state of the device match the state in the PPRC status data + * - does the device UID match with the UID in the PPRC status data + * - to prevent misrouted IO check if the given device is present in all + * related PPRC status data + */ +static int dasd_devmap_check_copy_relation(struct dasd_device *device, + struct dasd_copy_entry *entry, + struct dasd_pprc_data_sc4 *data, + struct dasd_copy_relation *copy) +{ + struct dasd_pprc_data_sc4 *tmp_dat; + struct dasd_device *tmp_dev; + struct dasd_uid uid; + int i, j; + + if (!device->discipline || !device->discipline->get_uid || + device->discipline->get_uid(device, &uid)) + return 1; + + i = dasd_devmap_entry_from_pprc_data(data, uid, entry->primary); + if (i < 0) { + dev_warn(&device->cdev->dev, "Device not part of a copy relation\n"); + return 1; + } + + /* double check which role the current device has */ + if (entry->primary) { + if (data->dev_info[i].flags & 0x80) { + dev_warn(&device->cdev->dev, "Copy pair secondary is setup as primary\n"); + return 1; + } + if (data->dev_info[i].prim_cu_ssid != uid.ssid || + data->dev_info[i].primary != uid.real_unit_addr) { + dev_warn(&device->cdev->dev, + "Primary device %s does not match copy pair status primary device %04x\n", + dev_name(&device->cdev->dev), + data->dev_info[i].prim_cu_ssid | + data->dev_info[i].primary); + return 1; + } + } else { + if (!(data->dev_info[i].flags & 0x80)) { + dev_warn(&device->cdev->dev, "Copy pair primary is setup as secondary\n"); + return 1; + } + if (data->dev_info[i].sec_cu_ssid != uid.ssid || + data->dev_info[i].secondary != uid.real_unit_addr) { + dev_warn(&device->cdev->dev, + "Secondary device %s does not match copy pair status secondary device %04x\n", + dev_name(&device->cdev->dev), + data->dev_info[i].sec_cu_ssid | + data->dev_info[i].secondary); + return 1; + } + } + + /* + * the current device has to be part of the copy relation of all + * entries to prevent misrouted IO to another copy pair + */ + for (j = 0; j < DASD_CP_ENTRIES; j++) { + if (entry == ©->entry[j]) + tmp_dev = device; + else + tmp_dev = copy->entry[j].device; + + if (!tmp_dev) + continue; + + if (dasd_devmap_get_pprc_status(tmp_dev, &tmp_dat)) + return 1; + + if (dasd_devmap_entry_from_pprc_data(tmp_dat, uid, entry->primary) < 0) { + dev_warn(&tmp_dev->cdev->dev, + "Copy pair relation does not contain device: %s\n", + dev_name(&device->cdev->dev)); + kfree(tmp_dat); + return 1; + } + kfree(tmp_dat); + } + return 0; +} + +/* delete device from copy relation entry */ +static void dasd_devmap_delete_copy_relation_device(struct dasd_device *device) +{ + struct dasd_copy_relation *copy; + int i; + + if (!device->copy) + return; + + copy = device->copy; + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].device == device) + copy->entry[i].device = NULL; + } + dasd_put_device(device); + device->copy = NULL; +} + +/* + * read all required information for a copy relation setup and setup the device + * accordingly + */ +int dasd_devmap_set_device_copy_relation(struct ccw_device *cdev, + bool pprc_enabled) +{ + struct dasd_pprc_data_sc4 *data = NULL; + struct dasd_copy_entry *entry = NULL; + struct dasd_copy_relation *copy; + struct dasd_devmap *devmap; + struct dasd_device *device; + int i, rc = 0; + + devmap = dasd_devmap_from_cdev(cdev); + if (IS_ERR(devmap)) + return PTR_ERR(devmap); + + device = devmap->device; + if (!device) + return -ENODEV; + + copy = devmap->copy; + /* no copy pair setup for this device */ + if (!copy) + goto out; + + rc = dasd_devmap_get_pprc_status(device, &data); + if (rc) + return rc; + + /* print error if PPRC is requested but not enabled on storage server */ + if (!pprc_enabled) { + dev_err(&cdev->dev, "Copy relation not enabled on storage server\n"); + rc = -EINVAL; + goto out; + } + + if (!data->dev_info[0].state) { + dev_warn(&device->cdev->dev, "Copy pair setup requested for device not in copy relation\n"); + rc = -EINVAL; + goto out; + } + /* find entry */ + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && + strncmp(dev_name(&cdev->dev), + copy->entry[i].busid, DASD_BUS_ID_SIZE) == 0) { + entry = ©->entry[i]; + break; + } + } + if (!entry) { + dev_warn(&device->cdev->dev, "Copy relation entry not found\n"); + rc = -EINVAL; + goto out; + } + /* check if the copy relation is valid */ + if (dasd_devmap_check_copy_relation(device, entry, data, copy)) { + dev_warn(&device->cdev->dev, "Copy relation faulty\n"); + rc = -EINVAL; + goto out; + } + + dasd_get_device(device); + copy->entry[i].device = device; + device->copy = copy; +out: + kfree(data); + return rc; +} +EXPORT_SYMBOL_GPL(dasd_devmap_set_device_copy_relation); + +/* * Wait queue for dasd_delete_device waits. */ static DECLARE_WAIT_QUEUE_HEAD(dasd_delete_wq); @@ -617,6 +858,8 @@ dasd_delete_device(struct dasd_device *device) dev_set_drvdata(&device->cdev->dev, NULL); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + /* Removve copy relation */ + dasd_devmap_delete_copy_relation_device(device); /* * Drop ref_count by 3, one for the devmap reference, one for * the cdev reference and one for the passed reference. @@ -694,6 +937,7 @@ void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device) gdp->private_data = devmap; spin_unlock(&dasd_devmap_lock); } +EXPORT_SYMBOL(dasd_add_link_to_gendisk); struct dasd_device *dasd_device_from_gendisk(struct gendisk *gdp) { @@ -1334,7 +1578,6 @@ dasd_timeout_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct dasd_device *device; - struct request_queue *q; unsigned long val; device = dasd_device_from_cdev(to_ccwdev(dev)); @@ -1346,15 +1589,13 @@ dasd_timeout_store(struct device *dev, struct device_attribute *attr, dasd_put_device(device); return -EINVAL; } - q = device->block->request_queue; - if (!q) { + if (!device->block->gdp) { dasd_put_device(device); return -ENODEV; } device->blk_timeout = val; - - blk_queue_rq_timeout(q, device->blk_timeout * HZ); + blk_queue_rq_timeout(device->block->gdp->queue, val * HZ); dasd_put_device(device); return count; @@ -1683,6 +1924,347 @@ dasd_path_fcs_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) static struct kobj_attribute path_fcs_attribute = __ATTR(fc_security, 0444, dasd_path_fcs_show, NULL); +/* + * print copy relation in the form + * primary,secondary[1] primary,secondary[2], ... + */ +static ssize_t +dasd_copy_pair_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + char prim_busid[DASD_BUS_ID_SIZE]; + struct dasd_copy_relation *copy; + struct dasd_devmap *devmap; + int len = 0; + int i; + + devmap = dasd_find_busid(dev_name(dev)); + if (IS_ERR(devmap)) + return -ENODEV; + + if (!devmap->copy) + return -ENODEV; + + copy = devmap->copy; + /* find primary */ + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && copy->entry[i].primary) { + strscpy(prim_busid, copy->entry[i].busid, + DASD_BUS_ID_SIZE); + break; + } + } + if (!copy->entry[i].primary) + goto out; + + /* print all secondary */ + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && !copy->entry[i].primary) + len += sysfs_emit_at(buf, len, "%s,%s ", prim_busid, + copy->entry[i].busid); + } + + len += sysfs_emit_at(buf, len, "\n"); +out: + return len; +} + +static int dasd_devmap_set_copy_relation(struct dasd_devmap *devmap, + struct dasd_copy_relation *copy, + char *busid, bool primary) +{ + int i; + + /* find free entry */ + for (i = 0; i < DASD_CP_ENTRIES; i++) { + /* current bus_id already included, nothing to do */ + if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) + return 0; + + if (!copy->entry[i].configured) + break; + } + if (i == DASD_CP_ENTRIES) + return -EINVAL; + + copy->entry[i].configured = true; + strscpy(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE); + if (primary) { + copy->active = ©->entry[i]; + copy->entry[i].primary = true; + } + if (!devmap->copy) + devmap->copy = copy; + + return 0; +} + +static void dasd_devmap_del_copy_relation(struct dasd_copy_relation *copy, + char *busid) +{ + int i; + + spin_lock(&dasd_devmap_lock); + /* find entry */ + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) + break; + } + if (i == DASD_CP_ENTRIES || !copy->entry[i].configured) { + spin_unlock(&dasd_devmap_lock); + return; + } + + copy->entry[i].configured = false; + memset(copy->entry[i].busid, 0, DASD_BUS_ID_SIZE); + if (copy->active == ©->entry[i]) { + copy->active = NULL; + copy->entry[i].primary = false; + } + spin_unlock(&dasd_devmap_lock); +} + +static int dasd_devmap_clear_copy_relation(struct device *dev) +{ + struct dasd_copy_relation *copy; + struct dasd_devmap *devmap; + int i, rc = 1; + + devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); + if (IS_ERR(devmap)) + return 1; + + spin_lock(&dasd_devmap_lock); + if (!devmap->copy) + goto out; + + copy = devmap->copy; + /* first check if all secondary devices are offline*/ + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (!copy->entry[i].configured) + continue; + + if (copy->entry[i].device == copy->active->device) + continue; + + if (copy->entry[i].device) + goto out; + } + /* clear all devmap entries */ + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (strlen(copy->entry[i].busid) == 0) + continue; + if (copy->entry[i].device) { + dasd_put_device(copy->entry[i].device); + copy->entry[i].device->copy = NULL; + copy->entry[i].device = NULL; + } + devmap = dasd_find_busid_locked(copy->entry[i].busid); + devmap->copy = NULL; + memset(copy->entry[i].busid, 0, DASD_BUS_ID_SIZE); + } + kfree(copy); + rc = 0; +out: + spin_unlock(&dasd_devmap_lock); + return rc; +} + +/* + * parse BUSIDs from a copy pair + */ +static int dasd_devmap_parse_busid(const char *buf, char *prim_busid, + char *sec_busid) +{ + char *primary, *secondary, *tmp, *pt; + int id0, id1, id2; + + pt = kstrdup(buf, GFP_KERNEL); + tmp = pt; + if (!tmp) + return -ENOMEM; + + primary = strsep(&tmp, ","); + if (!primary) { + kfree(pt); + return -EINVAL; + } + secondary = strsep(&tmp, ","); + if (!secondary) { + kfree(pt); + return -EINVAL; + } + if (dasd_busid(primary, &id0, &id1, &id2)) { + kfree(pt); + return -EINVAL; + } + sprintf(prim_busid, "%01x.%01x.%04x", id0, id1, id2); + if (dasd_busid(secondary, &id0, &id1, &id2)) { + kfree(pt); + return -EINVAL; + } + sprintf(sec_busid, "%01x.%01x.%04x", id0, id1, id2); + kfree(pt); + + return 0; +} + +static ssize_t dasd_copy_pair_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_devmap *prim_devmap, *sec_devmap; + char prim_busid[DASD_BUS_ID_SIZE]; + char sec_busid[DASD_BUS_ID_SIZE]; + struct dasd_copy_relation *copy; + struct dasd_device *device; + bool pprc_enabled; + int rc; + + if (strncmp(buf, "clear", strlen("clear")) == 0) { + if (dasd_devmap_clear_copy_relation(dev)) + return -EINVAL; + return count; + } + + rc = dasd_devmap_parse_busid(buf, prim_busid, sec_busid); + if (rc) + return rc; + + if (strncmp(dev_name(dev), prim_busid, DASD_BUS_ID_SIZE) != 0 && + strncmp(dev_name(dev), sec_busid, DASD_BUS_ID_SIZE) != 0) + return -EINVAL; + + /* allocate primary devmap if needed */ + prim_devmap = dasd_find_busid(prim_busid); + if (IS_ERR(prim_devmap)) + prim_devmap = dasd_add_busid(prim_busid, DASD_FEATURE_DEFAULT); + + /* allocate secondary devmap if needed */ + sec_devmap = dasd_find_busid(sec_busid); + if (IS_ERR(sec_devmap)) + sec_devmap = dasd_add_busid(sec_busid, DASD_FEATURE_DEFAULT); + + /* setting copy relation is only allowed for offline secondary */ + if (sec_devmap->device) + return -EINVAL; + + if (prim_devmap->copy) { + copy = prim_devmap->copy; + } else if (sec_devmap->copy) { + copy = sec_devmap->copy; + } else { + copy = kzalloc(sizeof(*copy), GFP_KERNEL); + if (!copy) + return -ENOMEM; + } + spin_lock(&dasd_devmap_lock); + rc = dasd_devmap_set_copy_relation(prim_devmap, copy, prim_busid, true); + if (rc) { + spin_unlock(&dasd_devmap_lock); + return rc; + } + rc = dasd_devmap_set_copy_relation(sec_devmap, copy, sec_busid, false); + if (rc) { + spin_unlock(&dasd_devmap_lock); + return rc; + } + spin_unlock(&dasd_devmap_lock); + + /* if primary device is already online call device setup directly */ + if (prim_devmap->device && !prim_devmap->device->copy) { + device = prim_devmap->device; + if (device->discipline->pprc_enabled) { + pprc_enabled = device->discipline->pprc_enabled(device); + rc = dasd_devmap_set_device_copy_relation(device->cdev, + pprc_enabled); + } else { + rc = -EOPNOTSUPP; + } + } + if (rc) { + dasd_devmap_del_copy_relation(copy, prim_busid); + dasd_devmap_del_copy_relation(copy, sec_busid); + count = rc; + } + + return count; +} +static DEVICE_ATTR(copy_pair, 0644, dasd_copy_pair_show, + dasd_copy_pair_store); + +static ssize_t +dasd_copy_role_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dasd_copy_relation *copy; + struct dasd_device *device; + int len, i; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + + if (!device->copy) { + len = sysfs_emit(buf, "none\n"); + goto out; + } + copy = device->copy; + /* only the active device is primary */ + if (copy->active->device == device) { + len = sysfs_emit(buf, "primary\n"); + goto out; + } + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].device == device) { + len = sysfs_emit(buf, "secondary\n"); + goto out; + } + } + /* not in the list, no COPY role */ + len = sysfs_emit(buf, "none\n"); +out: + dasd_put_device(device); + return len; +} +static DEVICE_ATTR(copy_role, 0444, dasd_copy_role_show, NULL); + +static ssize_t dasd_device_ping(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_device *device; + size_t rc; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + + /* + * do not try during offline processing + * early check only + * the sleep_on function itself checks for offline + * processing again + */ + if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) { + rc = -EBUSY; + goto out; + } + if (!device->discipline || !device->discipline->device_ping) { + rc = -EOPNOTSUPP; + goto out; + } + rc = device->discipline->device_ping(device); + if (!rc) + rc = count; +out: + dasd_put_device(device); + return rc; +} +static DEVICE_ATTR(ping, 0200, NULL, dasd_device_ping); + #define DASD_DEFINE_ATTR(_name, _func) \ static ssize_t dasd_##_name##_show(struct device *dev, \ struct device_attribute *attr, \ @@ -1739,6 +2321,9 @@ static struct attribute * dasd_attrs[] = { &dev_attr_hpf.attr, &dev_attr_ese.attr, &dev_attr_fc_security.attr, + &dev_attr_copy_pair.attr, + &dev_attr_copy_role.attr, + &dev_attr_ping.attr, NULL, }; diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index 94ee59864971..f956a4ac9881 100644 --- a/drivers/s390/block/dasd_diag.c +++ b/drivers/s390/block/dasd_diag.c @@ -627,7 +627,7 @@ dasd_diag_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, static void dasd_diag_setup_blk_queue(struct dasd_block *block) { unsigned int logical_block_size = block->bp_block; - struct request_queue *q = block->request_queue; + struct request_queue *q = block->gdp->queue; int max; max = DIAG_MAX_BLOCKS << block->s2b_shift; diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 3cc93e2e4e15..662730f3b027 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -2013,6 +2013,49 @@ static void dasd_eckd_kick_validate_server(struct dasd_device *device) } /* + * return if the device is the copy relation primary if a copy relation is active + */ +static int dasd_device_is_primary(struct dasd_device *device) +{ + if (!device->copy) + return 1; + + if (device->copy->active->device == device) + return 1; + + return 0; +} + +static int dasd_eckd_alloc_block(struct dasd_device *device) +{ + struct dasd_block *block; + struct dasd_uid temp_uid; + + if (!dasd_device_is_primary(device)) + return 0; + + dasd_eckd_get_uid(device, &temp_uid); + if (temp_uid.type == UA_BASE_DEVICE) { + block = dasd_alloc_block(); + if (IS_ERR(block)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "could not allocate dasd block structure"); + return PTR_ERR(block); + } + device->block = block; + block->base = device; + } + return 0; +} + +static bool dasd_eckd_pprc_enabled(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->rdc_data.facilities.PPRC_enabled; +} + +/* * Check device characteristics. * If the device is accessible using ECKD discipline, the device is enabled. */ @@ -2020,8 +2063,6 @@ static int dasd_eckd_check_characteristics(struct dasd_device *device) { struct dasd_eckd_private *private = device->private; - struct dasd_block *block; - struct dasd_uid temp_uid; int rc, i; int readonly; unsigned long value; @@ -2079,20 +2120,29 @@ dasd_eckd_check_characteristics(struct dasd_device *device) device->default_expires = value; } - dasd_eckd_get_uid(device, &temp_uid); - if (temp_uid.type == UA_BASE_DEVICE) { - block = dasd_alloc_block(); - if (IS_ERR(block)) { - DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", - "could not allocate dasd " - "block structure"); - rc = PTR_ERR(block); - goto out_err1; - } - device->block = block; - block->base = device; + /* Read Device Characteristics */ + rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, + &private->rdc_data, 64); + if (rc) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "Read device characteristic failed, rc=%d", rc); + goto out_err1; + } + + /* setup PPRC for device from devmap */ + rc = dasd_devmap_set_device_copy_relation(device->cdev, + dasd_eckd_pprc_enabled(device)); + if (rc) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "copy relation setup failed, rc=%d", rc); + goto out_err1; } + /* check if block device is needed and allocate in case */ + rc = dasd_eckd_alloc_block(device); + if (rc) + goto out_err1; + /* register lcu with alias handling, enable PAV */ rc = dasd_alias_make_device_known_to_lcu(device); if (rc) @@ -2117,15 +2167,6 @@ dasd_eckd_check_characteristics(struct dasd_device *device) /* Read Extent Pool Information */ dasd_eckd_read_ext_pool_info(device); - /* Read Device Characteristics */ - rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, - &private->rdc_data, 64); - if (rc) { - DBF_EVENT_DEVID(DBF_WARNING, device->cdev, - "Read device characteristic failed, rc=%d", rc); - goto out_err3; - } - if ((device->features & DASD_FEATURE_USERAW) && !(private->rdc_data.facilities.RT_in_LR)) { dev_err(&device->cdev->dev, "The storage server does not " @@ -6078,6 +6119,207 @@ static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) return 0; } +static struct dasd_device +*copy_relation_find_device(struct dasd_copy_relation *copy, + char *busid) +{ + int i; + + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) + return copy->entry[i].device; + } + return NULL; +} + +/* + * set the new active/primary device + */ +static void copy_pair_set_active(struct dasd_copy_relation *copy, char *new_busid, + char *old_busid) +{ + int i; + + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, new_busid, + DASD_BUS_ID_SIZE) == 0) { + copy->active = ©->entry[i]; + copy->entry[i].primary = true; + } else if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, old_busid, + DASD_BUS_ID_SIZE) == 0) { + copy->entry[i].primary = false; + } + } +} + +/* + * The function will swap the role of a given copy pair. + * During the swap operation the relation of the blockdevice is disconnected + * from the old primary and connected to the new. + * + * IO is paused on the block queue before swap and may be resumed afterwards. + */ +static int dasd_eckd_copy_pair_swap(struct dasd_device *device, char *prim_busid, + char *sec_busid) +{ + struct dasd_device *primary, *secondary; + struct dasd_copy_relation *copy; + struct dasd_block *block; + struct gendisk *gdp; + + copy = device->copy; + if (!copy) + return DASD_COPYPAIRSWAP_INVALID; + primary = copy->active->device; + if (!primary) + return DASD_COPYPAIRSWAP_INVALID; + /* double check if swap has correct primary */ + if (strncmp(dev_name(&primary->cdev->dev), prim_busid, DASD_BUS_ID_SIZE) != 0) + return DASD_COPYPAIRSWAP_PRIMARY; + + secondary = copy_relation_find_device(copy, sec_busid); + if (!secondary) + return DASD_COPYPAIRSWAP_SECONDARY; + + /* + * usually the device should be quiesced for swap + * for paranoia stop device and requeue requests again + */ + dasd_device_set_stop_bits(primary, DASD_STOPPED_PPRC); + dasd_device_set_stop_bits(secondary, DASD_STOPPED_PPRC); + dasd_generic_requeue_all_requests(primary); + + /* swap DASD internal device <> block assignment */ + block = primary->block; + primary->block = NULL; + secondary->block = block; + block->base = secondary; + /* set new primary device in COPY relation */ + copy_pair_set_active(copy, sec_busid, prim_busid); + + /* swap blocklayer device link */ + gdp = block->gdp; + dasd_add_link_to_gendisk(gdp, secondary); + + /* re-enable device */ + dasd_device_remove_stop_bits(primary, DASD_STOPPED_PPRC); + dasd_device_remove_stop_bits(secondary, DASD_STOPPED_PPRC); + dasd_schedule_device_bh(secondary); + + return DASD_COPYPAIRSWAP_SUCCESS; +} + +/* + * Perform Subsystem Function - Peer-to-Peer Remote Copy Extended Query + */ +static int dasd_eckd_query_pprc_status(struct dasd_device *device, + struct dasd_pprc_data_sc4 *data) +{ + struct dasd_pprc_data_sc4 *pprc_data; + struct dasd_psf_prssd_data *prssdp; + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int rc; + + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, + sizeof(*prssdp) + sizeof(*pprc_data) + 1, + device, NULL); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate query PPRC status request"); + return PTR_ERR(cqr); + } + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + cqr->retries = 256; + cqr->expires = 10 * HZ; + + /* Prepare for Read Subsystem Data */ + prssdp = (struct dasd_psf_prssd_data *)cqr->data; + memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); + prssdp->order = PSF_ORDER_PRSSD; + prssdp->suborder = PSF_SUBORDER_PPRCEQ; + prssdp->varies[0] = PPRCEQ_SCOPE_4; + pprc_data = (struct dasd_pprc_data_sc4 *)(prssdp + 1); + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->count = sizeof(struct dasd_psf_prssd_data); + ccw->flags |= CCW_FLAG_CC; + ccw->flags |= CCW_FLAG_SLI; + ccw->cda = (__u32)(addr_t)prssdp; + + /* Read Subsystem Data - query host access */ + ccw++; + ccw->cmd_code = DASD_ECKD_CCW_RSSD; + ccw->count = sizeof(*pprc_data); + ccw->flags |= CCW_FLAG_SLI; + ccw->cda = (__u32)(addr_t)pprc_data; + + cqr->buildclk = get_tod_clock(); + cqr->status = DASD_CQR_FILLED; + + rc = dasd_sleep_on_interruptible(cqr); + if (rc == 0) { + *data = *pprc_data; + } else { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "PPRC Extended Query failed with rc=%d\n", + rc); + rc = -EOPNOTSUPP; + } + + dasd_sfree_request(cqr, cqr->memdev); + return rc; +} + +/* + * ECKD NOP - no operation + */ +static int dasd_eckd_nop(struct dasd_device *device) +{ + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int rc; + + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 1, device, NULL); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate NOP request"); + return PTR_ERR(cqr); + } + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + cqr->retries = 1; + cqr->expires = 10 * HZ; + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_NOP; + ccw->flags |= CCW_FLAG_SLI; + + cqr->buildclk = get_tod_clock(); + cqr->status = DASD_CQR_FILLED; + + rc = dasd_sleep_on_interruptible(cqr); + if (rc != 0) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "NOP failed with rc=%d\n", rc); + rc = -EOPNOTSUPP; + } + dasd_sfree_request(cqr, cqr->memdev); + return rc; +} + +static int dasd_eckd_device_ping(struct dasd_device *device) +{ + return dasd_eckd_nop(device); +} + /* * Perform Subsystem Function - CUIR response */ @@ -6602,7 +6844,7 @@ static void dasd_eckd_handle_hpf_error(struct dasd_device *device, static void dasd_eckd_setup_blk_queue(struct dasd_block *block) { unsigned int logical_block_size = block->bp_block; - struct request_queue *q = block->request_queue; + struct request_queue *q = block->gdp->queue; struct dasd_device *device = block->base; int max; @@ -6697,6 +6939,10 @@ static struct dasd_discipline dasd_eckd_discipline = { .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, .ese_format = dasd_eckd_ese_format, .ese_read = dasd_eckd_ese_read, + .pprc_status = dasd_eckd_query_pprc_status, + .pprc_enabled = dasd_eckd_pprc_enabled, + .copy_pair_swap = dasd_eckd_copy_pair_swap, + .device_ping = dasd_eckd_device_ping, }; static int __init diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h index a91b265441cc..f9299bd184ba 100644 --- a/drivers/s390/block/dasd_eckd.h +++ b/drivers/s390/block/dasd_eckd.h @@ -13,6 +13,7 @@ /***************************************************************************** * SECTION: CCW Definitions ****************************************************************************/ +#define DASD_ECKD_CCW_NOP 0x03 #define DASD_ECKD_CCW_WRITE 0x05 #define DASD_ECKD_CCW_READ 0x06 #define DASD_ECKD_CCW_WRITE_HOME_ADDRESS 0x09 @@ -66,10 +67,16 @@ * Perform Subsystem Function / Sub-Orders */ #define PSF_SUBORDER_QHA 0x1C /* Query Host Access */ +#define PSF_SUBORDER_PPRCEQ 0x50 /* PPRC Extended Query */ #define PSF_SUBORDER_VSQ 0x52 /* Volume Storage Query */ #define PSF_SUBORDER_LCQ 0x53 /* Logical Configuration Query */ /* + * PPRC Extended Query Scopes + */ +#define PPRCEQ_SCOPE_4 0x04 /* Scope 4 for PPRC Extended Query */ + +/* * CUIR response condition codes */ #define PSF_CUIR_INVALID 0x00 @@ -261,7 +268,7 @@ struct dasd_eckd_characteristics { unsigned char reserved3:8; unsigned char defect_wr:1; unsigned char XRC_supported:1; - unsigned char reserved4:1; + unsigned char PPRC_enabled:1; unsigned char striping:1; unsigned char reserved5:4; unsigned char cfw:1; diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c index 5ae64af9ccea..d4d31cd11d26 100644 --- a/drivers/s390/block/dasd_eer.c +++ b/drivers/s390/block/dasd_eer.c @@ -313,7 +313,7 @@ static void dasd_eer_write_standard_trigger(struct dasd_device *device, ktime_get_real_ts64(&ts); header.tv_sec = ts.tv_sec; header.tv_usec = ts.tv_nsec / NSEC_PER_USEC; - strlcpy(header.busid, dev_name(&device->cdev->dev), + strscpy(header.busid, dev_name(&device->cdev->dev), DASD_EER_BUSID_SIZE); spin_lock_irqsave(&bufferlock, flags); @@ -356,7 +356,7 @@ static void dasd_eer_write_snss_trigger(struct dasd_device *device, ktime_get_real_ts64(&ts); header.tv_sec = ts.tv_sec; header.tv_usec = ts.tv_nsec / NSEC_PER_USEC; - strlcpy(header.busid, dev_name(&device->cdev->dev), + strscpy(header.busid, dev_name(&device->cdev->dev), DASD_EER_BUSID_SIZE); spin_lock_irqsave(&bufferlock, flags); diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c index 60be7f7bf2d1..cddfb01a3dca 100644 --- a/drivers/s390/block/dasd_fba.c +++ b/drivers/s390/block/dasd_fba.c @@ -767,7 +767,7 @@ dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, static void dasd_fba_setup_blk_queue(struct dasd_block *block) { unsigned int logical_block_size = block->bp_block; - struct request_queue *q = block->request_queue; + struct request_queue *q = block->gdp->queue; unsigned int max_bytes, max_discard_sectors; int max; diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c index 5a83f0a39901..998a961e1704 100644 --- a/drivers/s390/block/dasd_genhd.c +++ b/drivers/s390/block/dasd_genhd.c @@ -25,7 +25,14 @@ #include "dasd_int.h" -static struct lock_class_key dasd_bio_compl_lkclass; +static unsigned int queue_depth = 32; +static unsigned int nr_hw_queues = 4; + +module_param(queue_depth, uint, 0444); +MODULE_PARM_DESC(queue_depth, "Default queue depth for new DASD devices"); + +module_param(nr_hw_queues, uint, 0444); +MODULE_PARM_DESC(nr_hw_queues, "Default number of hardware queues for new DASD devices"); /* * Allocate and register gendisk structure for device. @@ -41,10 +48,21 @@ int dasd_gendisk_alloc(struct dasd_block *block) if (base->devindex >= DASD_PER_MAJOR) return -EBUSY; - gdp = blk_mq_alloc_disk_for_queue(block->request_queue, - &dasd_bio_compl_lkclass); - if (!gdp) - return -ENOMEM; + block->tag_set.ops = &dasd_mq_ops; + block->tag_set.cmd_size = sizeof(struct dasd_ccw_req); + block->tag_set.nr_hw_queues = nr_hw_queues; + block->tag_set.queue_depth = queue_depth; + block->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; + block->tag_set.numa_node = NUMA_NO_NODE; + rc = blk_mq_alloc_tag_set(&block->tag_set); + if (rc) + return rc; + + gdp = blk_mq_alloc_disk(&block->tag_set, block); + if (IS_ERR(gdp)) { + blk_mq_free_tag_set(&block->tag_set); + return PTR_ERR(gdp); + } /* Initialize gendisk structure. */ gdp->major = DASD_MAJOR; @@ -100,6 +118,7 @@ void dasd_gendisk_free(struct dasd_block *block) block->gdp->private_data = NULL; put_disk(block->gdp); block->gdp = NULL; + blk_mq_free_tag_set(&block->tag_set); } } diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 333a399f754e..97adc8a7ae6b 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -260,6 +260,55 @@ struct dasd_uid { }; /* + * PPRC Status data + */ +struct dasd_pprc_header { + __u8 entries; /* 0 Number of device entries */ + __u8 unused; /* 1 unused */ + __u16 entry_length; /* 2-3 Length of device entry */ + __u32 unused2; /* 4-7 unused */ +} __packed; + +struct dasd_pprc_dev_info { + __u8 state; /* 0 Copy State */ + __u8 flags; /* 1 Flags */ + __u8 reserved1[2]; /* 2-3 reserved */ + __u8 prim_lss; /* 4 Primary device LSS */ + __u8 primary; /* 5 Primary device address */ + __u8 sec_lss; /* 6 Secondary device LSS */ + __u8 secondary; /* 7 Secondary device address */ + __u16 pprc_id; /* 8-9 Peer-to-Peer Remote Copy ID */ + __u8 reserved2[12]; /* 10-21 reserved */ + __u16 prim_cu_ssid; /* 22-23 Pimary Control Unit SSID */ + __u8 reserved3[12]; /* 24-35 reserved */ + __u16 sec_cu_ssid; /* 36-37 Secondary Control Unit SSID */ + __u8 reserved4[90]; /* 38-127 reserved */ +} __packed; + +struct dasd_pprc_data_sc4 { + struct dasd_pprc_header header; + struct dasd_pprc_dev_info dev_info[5]; +} __packed; + +#define DASD_BUS_ID_SIZE 20 +#define DASD_CP_ENTRIES 5 + +struct dasd_copy_entry { + char busid[DASD_BUS_ID_SIZE]; + struct dasd_device *device; + bool primary; + bool configured; +}; + +struct dasd_copy_relation { + struct dasd_copy_entry entry[DASD_CP_ENTRIES]; + struct dasd_copy_entry *active; +}; + +int dasd_devmap_set_device_copy_relation(struct ccw_device *, + bool pprc_enabled); + +/* * the struct dasd_discipline is * sth like a table of virtual functions, if you think of dasd_eckd * inheriting dasd... @@ -387,6 +436,10 @@ struct dasd_discipline { struct dasd_ccw_req *(*ese_format)(struct dasd_device *, struct dasd_ccw_req *, struct irb *); int (*ese_read)(struct dasd_ccw_req *, struct irb *); + int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *); + bool (*pprc_enabled)(struct dasd_device *); + int (*copy_pair_swap)(struct dasd_device *, char *, char *); + int (*device_ping)(struct dasd_device *); }; extern struct dasd_discipline *dasd_diag_discipline_pointer; @@ -583,12 +636,12 @@ struct dasd_device { struct dasd_profile profile; struct dasd_format_entry format_entry; struct kset *paths_info; + struct dasd_copy_relation *copy; }; struct dasd_block { /* Block device stuff. */ struct gendisk *gdp; - struct request_queue *request_queue; spinlock_t request_queue_lock; struct blk_mq_tag_set tag_set; struct block_device *bdev; @@ -629,6 +682,7 @@ struct dasd_queue { #define DASD_STOPPED_PENDING 4 /* long busy */ #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ #define DASD_STOPPED_SU 16 /* summary unit check handling */ +#define DASD_STOPPED_PPRC 32 /* PPRC swap */ #define DASD_STOPPED_NOSPC 128 /* no space left */ /* per device flags */ @@ -654,6 +708,22 @@ struct dasd_queue { void dasd_put_device_wake(struct dasd_device *); /* + * return values to be returned from the copy pair swap function + * 0x00: swap successful + * 0x01: swap data invalid + * 0x02: no active device found + * 0x03: wrong primary specified + * 0x04: secondary device not found + * 0x05: swap already running + */ +#define DASD_COPYPAIRSWAP_SUCCESS 0 +#define DASD_COPYPAIRSWAP_INVALID 1 +#define DASD_COPYPAIRSWAP_NOACTIVE 2 +#define DASD_COPYPAIRSWAP_PRIMARY 3 +#define DASD_COPYPAIRSWAP_SECONDARY 4 +#define DASD_COPYPAIRSWAP_MULTIPLE 5 + +/* * Reference count inliners */ static inline void @@ -779,6 +849,7 @@ extern debug_info_t *dasd_debug_area; extern struct dasd_profile dasd_global_profile; extern unsigned int dasd_global_profile_level; extern const struct block_device_operations dasd_device_operations; +extern struct blk_mq_ops dasd_mq_ops; extern struct kmem_cache *dasd_page_cache; @@ -837,6 +908,8 @@ int dasd_generic_verify_path(struct dasd_device *, __u8); void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); void dasd_generic_space_avail(struct dasd_device *); +int dasd_generic_requeue_all_requests(struct dasd_device *); + int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); char *dasd_get_sense(struct irb *); diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index 95349f95758c..d0ddf2cc9786 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -379,6 +379,56 @@ out_err: return rc; } +/* + * Swap driver iternal copy relation. + */ +static int +dasd_ioctl_copy_pair_swap(struct block_device *bdev, void __user *argp) +{ + struct dasd_copypair_swap_data_t data; + struct dasd_device *device; + int rc; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + device = dasd_device_from_gendisk(bdev->bd_disk); + if (!device) + return -ENODEV; + + if (copy_from_user(&data, argp, sizeof(struct dasd_copypair_swap_data_t))) { + dasd_put_device(device); + return -EFAULT; + } + if (memchr_inv(data.reserved, 0, sizeof(data.reserved))) { + pr_warn("%s: Ivalid swap data specified.\n", + dev_name(&device->cdev->dev)); + dasd_put_device(device); + return DASD_COPYPAIRSWAP_INVALID; + } + if (bdev_is_partition(bdev)) { + pr_warn("%s: The specified DASD is a partition and cannot be swapped\n", + dev_name(&device->cdev->dev)); + dasd_put_device(device); + return DASD_COPYPAIRSWAP_INVALID; + } + if (!device->copy) { + pr_warn("%s: The specified DASD has no copy pair set up\n", + dev_name(&device->cdev->dev)); + dasd_put_device(device); + return -ENODEV; + } + if (!device->discipline->copy_pair_swap) { + dasd_put_device(device); + return -EOPNOTSUPP; + } + rc = device->discipline->copy_pair_swap(device, data.primary, + data.secondary); + dasd_put_device(device); + + return rc; +} + #ifdef CONFIG_DASD_PROFILE /* * Reset device profile information @@ -637,6 +687,9 @@ int dasd_ioctl(struct block_device *bdev, fmode_t mode, case BIODASDRAS: rc = dasd_ioctl_release_space(bdev, argp); break; + case BIODASDCOPYPAIRSWAP: + rc = dasd_ioctl_copy_pair_swap(bdev, argp); + break; default: /* if the discipline has an ioctl method try it. */ rc = -ENOTTY; diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 5187705bd0f3..93b80da60277 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -614,7 +614,7 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char rc = -ENAMETOOLONG; goto seg_list_del; } - strlcpy(local_buf, buf, i + 1); + strscpy(local_buf, buf, i + 1); dev_info->num_of_segments = num_of_segments; rc = dcssblk_is_continuous(dev_info); if (rc < 0) diff --git a/drivers/s390/char/hmcdrv_cache.c b/drivers/s390/char/hmcdrv_cache.c index 1f5bdb237862..43df27ceec11 100644 --- a/drivers/s390/char/hmcdrv_cache.c +++ b/drivers/s390/char/hmcdrv_cache.c @@ -154,7 +154,7 @@ static ssize_t hmcdrv_cache_do(const struct hmcdrv_ftp_cmdspec *ftp, /* cache some file info (FTP command, file name and file * size) unconditionally */ - strlcpy(hmcdrv_cache_file.fname, ftp->fname, + strscpy(hmcdrv_cache_file.fname, ftp->fname, HMCDRV_FTP_FIDENT_MAX); hmcdrv_cache_file.id = ftp->id; pr_debug("caching cmd %d, file size %zu for '%s'\n", diff --git a/drivers/s390/char/tape_class.c b/drivers/s390/char/tape_class.c index b58df0dd0039..c21dc68e05a0 100644 --- a/drivers/s390/char/tape_class.c +++ b/drivers/s390/char/tape_class.c @@ -54,10 +54,10 @@ struct tape_class_device *register_tape_dev( if (!tcd) return ERR_PTR(-ENOMEM); - strlcpy(tcd->device_name, device_name, TAPECLASS_NAME_LEN); + strscpy(tcd->device_name, device_name, TAPECLASS_NAME_LEN); for (s = strchr(tcd->device_name, '/'); s; s = strchr(s, '/')) *s = '!'; - strlcpy(tcd->mode_name, mode_name, TAPECLASS_NAME_LEN); + strscpy(tcd->mode_name, mode_name, TAPECLASS_NAME_LEN); for (s = strchr(tcd->mode_name, '/'); s; s = strchr(s, '/')) *s = '!'; diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c index 5c83f71c1d0e..26e3995ac062 100644 --- a/drivers/s390/char/tty3270.c +++ b/drivers/s390/char/tty3270.c @@ -1760,7 +1760,7 @@ tty3270_flush_chars(struct tty_struct *tty) * Check for visible/invisible input switches */ static void -tty3270_set_termios(struct tty_struct *tty, struct ktermios *old) +tty3270_set_termios(struct tty_struct *tty, const struct ktermios *old) { struct tty3270 *tp; int new; diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c index 68f49e2e964c..131293f7f152 100644 --- a/drivers/s390/char/vmur.c +++ b/drivers/s390/char/vmur.c @@ -15,12 +15,14 @@ #include <linux/cdev.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/kobject.h> #include <linux/uaccess.h> #include <asm/cio.h> #include <asm/ccwdev.h> #include <asm/debug.h> #include <asm/diag.h> +#include <asm/scsw.h> #include "vmur.h" @@ -78,6 +80,8 @@ static struct ccw_driver ur_driver = { static DEFINE_MUTEX(vmur_mutex); +static void ur_uevent(struct work_struct *ws); + /* * Allocation, freeing, getting and putting of urdev structures * @@ -108,6 +112,7 @@ static struct urdev *urdev_alloc(struct ccw_device *cdev) ccw_device_get_id(cdev, &urd->dev_id); mutex_init(&urd->io_mutex); init_waitqueue_head(&urd->wait); + INIT_WORK(&urd->uevent_work, ur_uevent); spin_lock_init(&urd->open_lock); refcount_set(&urd->ref_count, 1); urd->cdev = cdev; @@ -275,6 +280,18 @@ out: return rc; } +static void ur_uevent(struct work_struct *ws) +{ + struct urdev *urd = container_of(ws, struct urdev, uevent_work); + char *envp[] = { + "EVENT=unsol_de", /* Unsolicited device-end interrupt */ + NULL + }; + + kobject_uevent_env(&urd->cdev->dev.kobj, KOBJ_CHANGE, envp); + urdev_put(urd); +} + /* * ur interrupt handler, called from the ccw_device layer */ @@ -288,12 +305,21 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm, intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat, irb->scsw.cmd.count); } + urd = dev_get_drvdata(&cdev->dev); if (!intparm) { TRACE("ur_int_handler: unsolicited interrupt\n"); + + if (scsw_dstat(&irb->scsw) & DEV_STAT_DEV_END) { + /* + * Userspace might be interested in a transition to + * device-ready state. + */ + urdev_get(urd); + schedule_work(&urd->uevent_work); + } + return; } - urd = dev_get_drvdata(&cdev->dev); - BUG_ON(!urd); /* On special conditions irb is an error pointer */ if (IS_ERR(irb)) urd->io_request_rc = PTR_ERR(irb); @@ -809,7 +835,6 @@ static int ur_probe(struct ccw_device *cdev) rc = -ENOMEM; goto fail_urdev_put; } - cdev->handler = ur_int_handler; /* validate virtual unit record device */ urd->class = get_urd_class(urd); @@ -823,6 +848,7 @@ static int ur_probe(struct ccw_device *cdev) } spin_lock_irq(get_ccwdev_lock(cdev)); dev_set_drvdata(&cdev->dev, urd); + cdev->handler = ur_int_handler; spin_unlock_irq(get_ccwdev_lock(cdev)); mutex_unlock(&vmur_mutex); @@ -928,6 +954,10 @@ static int ur_set_offline_force(struct ccw_device *cdev, int force) rc = -EBUSY; goto fail_urdev_put; } + if (cancel_work_sync(&urd->uevent_work)) { + /* Work not run yet - need to release reference here */ + urdev_put(urd); + } device_destroy(vmur_class, urd->char_device->dev); cdev_del(urd->char_device); urd->char_device = NULL; @@ -963,6 +993,7 @@ static void ur_remove(struct ccw_device *cdev) spin_lock_irqsave(get_ccwdev_lock(cdev), flags); urdev_put(dev_get_drvdata(&cdev->dev)); dev_set_drvdata(&cdev->dev, NULL); + cdev->handler = NULL; spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); mutex_unlock(&vmur_mutex); diff --git a/drivers/s390/char/vmur.h b/drivers/s390/char/vmur.h index 608b0719ce17..92d17d7cb47b 100644 --- a/drivers/s390/char/vmur.h +++ b/drivers/s390/char/vmur.h @@ -13,6 +13,7 @@ #define _VMUR_H_ #include <linux/refcount.h> +#include <linux/workqueue.h> #define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */ #define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */ @@ -76,6 +77,7 @@ struct urdev { wait_queue_head_t wait; /* wait queue to serialize open */ int open_flag; /* "urdev is open" flag */ spinlock_t open_lock; /* serialize critical sections */ + struct work_struct uevent_work; /* work to send uevent */ }; /* diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c index f6da215ccf9f..6165e6aae762 100644 --- a/drivers/s390/char/zcore.c +++ b/drivers/s390/char/zcore.c @@ -30,6 +30,7 @@ #include <asm/checksum.h> #include <asm/os_info.h> #include <asm/switch_to.h> +#include <asm/maccess.h> #include "sclp.h" #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x) diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 913b6ddd040b..c7db95398500 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -753,13 +753,9 @@ static int __unset_online(struct device *dev, void *data) { struct idset *set = data; struct subchannel *sch = to_subchannel(dev); - struct ccw_device *cdev; - if (sch->st == SUBCHANNEL_TYPE_IO) { - cdev = sch_get_cdev(sch); - if (cdev && cdev->online) - idset_sch_del(set, sch->schid); - } + if (sch->st == SUBCHANNEL_TYPE_IO && sch->config.ena) + idset_sch_del(set, sch->schid); return 0; } diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c index 4bb7965daa0f..1a9714af51e4 100644 --- a/drivers/s390/cio/qdio_debug.c +++ b/drivers/s390/cio/qdio_debug.c @@ -87,7 +87,7 @@ int qdio_allocate_dbf(struct qdio_irq *irq_ptr) debug_unregister(irq_ptr->debug_area); return -ENOMEM; } - strlcpy(new_entry->dbf_name, text, QDIO_DBF_NAME_LEN); + strscpy(new_entry->dbf_name, text, QDIO_DBF_NAME_LEN); new_entry->dbf_info = irq_ptr->debug_area; mutex_lock(&qdio_dbf_list_mutex); list_add(&new_entry->dbf_list, &qdio_dbf_list); diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c index 86d9e428357b..7f5402fe857a 100644 --- a/drivers/s390/cio/vfio_ccw_drv.c +++ b/drivers/s390/cio/vfio_ccw_drv.c @@ -12,7 +12,6 @@ #include <linux/module.h> #include <linux/init.h> -#include <linux/device.h> #include <linux/slab.h> #include <linux/mdev.h> @@ -142,7 +141,6 @@ static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch) INIT_LIST_HEAD(&private->crw); INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo); INIT_WORK(&private->crw_work, vfio_ccw_crw_todo); - atomic_set(&private->avail, 1); private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1), GFP_KERNEL); @@ -203,7 +201,6 @@ static void vfio_ccw_free_private(struct vfio_ccw_private *private) mutex_destroy(&private->io_mutex); kfree(private); } - static int vfio_ccw_sch_probe(struct subchannel *sch) { struct pmcw *pmcw = &sch->schib.pmcw; @@ -222,7 +219,12 @@ static int vfio_ccw_sch_probe(struct subchannel *sch) dev_set_drvdata(&sch->dev, private); - ret = mdev_register_device(&sch->dev, &vfio_ccw_mdev_driver); + private->mdev_type.sysfs_name = "io"; + private->mdev_type.pretty_name = "I/O subchannel (Non-QDIO)"; + private->mdev_types[0] = &private->mdev_type; + ret = mdev_register_parent(&private->parent, &sch->dev, + &vfio_ccw_mdev_driver, + private->mdev_types, 1); if (ret) goto out_free; @@ -241,7 +243,7 @@ static void vfio_ccw_sch_remove(struct subchannel *sch) { struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev); - mdev_unregister_device(&sch->dev); + mdev_unregister_parent(&private->parent); dev_set_drvdata(&sch->dev, NULL); diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 4a806a2273b5..6ae4d012d800 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -11,7 +11,6 @@ */ #include <linux/vfio.h> -#include <linux/mdev.h> #include <linux/nospec.h> #include <linux/slab.h> @@ -45,47 +44,14 @@ static void vfio_ccw_dma_unmap(struct vfio_device *vdev, u64 iova, u64 length) vfio_ccw_mdev_reset(private); } -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "I/O subchannel (Non-QDIO)\n"); -} -static MDEV_TYPE_ATTR_RO(name); - -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_CCW_STRING); -} -static MDEV_TYPE_ATTR_RO(device_api); - -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) +static int vfio_ccw_mdev_init_dev(struct vfio_device *vdev) { struct vfio_ccw_private *private = - dev_get_drvdata(mtype_get_parent_dev(mtype)); + container_of(vdev, struct vfio_ccw_private, vdev); - return sprintf(buf, "%d\n", atomic_read(&private->avail)); + init_completion(&private->release_comp); + return 0; } -static MDEV_TYPE_ATTR_RO(available_instances); - -static struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_name.attr, - &mdev_type_attr_device_api.attr, - &mdev_type_attr_available_instances.attr, - NULL, -}; - -static struct attribute_group mdev_type_group = { - .name = "io", - .attrs = mdev_types_attrs, -}; - -static struct attribute_group *mdev_type_groups[] = { - &mdev_type_group, - NULL, -}; static int vfio_ccw_mdev_probe(struct mdev_device *mdev) { @@ -95,12 +61,9 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev) if (private->state == VFIO_CCW_STATE_NOT_OPER) return -ENODEV; - if (atomic_dec_if_positive(&private->avail) < 0) - return -EPERM; - - memset(&private->vdev, 0, sizeof(private->vdev)); - vfio_init_group_dev(&private->vdev, &mdev->dev, - &vfio_ccw_dev_ops); + ret = vfio_init_device(&private->vdev, &mdev->dev, &vfio_ccw_dev_ops); + if (ret) + return ret; VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: create\n", private->sch->schid.cssid, @@ -109,16 +72,32 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev) ret = vfio_register_emulated_iommu_dev(&private->vdev); if (ret) - goto err_atomic; + goto err_put_vdev; dev_set_drvdata(&mdev->dev, private); return 0; -err_atomic: - vfio_uninit_group_dev(&private->vdev); - atomic_inc(&private->avail); +err_put_vdev: + vfio_put_device(&private->vdev); return ret; } +static void vfio_ccw_mdev_release_dev(struct vfio_device *vdev) +{ + struct vfio_ccw_private *private = + container_of(vdev, struct vfio_ccw_private, vdev); + + /* + * We cannot free vfio_ccw_private here because it includes + * parent info which must be free'ed by css driver. + * + * Use a workaround by memset'ing the core device part and + * then notifying the remove path that all active references + * to this device have been released. + */ + memset(vdev, 0, sizeof(*vdev)); + complete(&private->release_comp); +} + static void vfio_ccw_mdev_remove(struct mdev_device *mdev) { struct vfio_ccw_private *private = dev_get_drvdata(mdev->dev.parent); @@ -130,8 +109,16 @@ static void vfio_ccw_mdev_remove(struct mdev_device *mdev) vfio_unregister_group_dev(&private->vdev); - vfio_uninit_group_dev(&private->vdev); - atomic_inc(&private->avail); + vfio_put_device(&private->vdev); + /* + * Wait for all active references on mdev are released so it + * is safe to defer kfree() to a later point. + * + * TODO: the clean fix is to split parent/mdev info from ccw + * private structure so each can be managed in its own life + * cycle. + */ + wait_for_completion(&private->release_comp); } static int vfio_ccw_mdev_open_device(struct vfio_device *vdev) @@ -592,6 +579,8 @@ static void vfio_ccw_mdev_request(struct vfio_device *vdev, unsigned int count) } static const struct vfio_device_ops vfio_ccw_dev_ops = { + .init = vfio_ccw_mdev_init_dev, + .release = vfio_ccw_mdev_release_dev, .open_device = vfio_ccw_mdev_open_device, .close_device = vfio_ccw_mdev_close_device, .read = vfio_ccw_mdev_read, @@ -602,6 +591,8 @@ static const struct vfio_device_ops vfio_ccw_dev_ops = { }; struct mdev_driver vfio_ccw_mdev_driver = { + .device_api = VFIO_DEVICE_API_CCW_STRING, + .max_instances = 1, .driver = { .name = "vfio_ccw_mdev", .owner = THIS_MODULE, @@ -609,5 +600,4 @@ struct mdev_driver vfio_ccw_mdev_driver = { }, .probe = vfio_ccw_mdev_probe, .remove = vfio_ccw_mdev_remove, - .supported_type_groups = mdev_type_groups, }; diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h index cd24b7fada91..bd5fb81456af 100644 --- a/drivers/s390/cio/vfio_ccw_private.h +++ b/drivers/s390/cio/vfio_ccw_private.h @@ -18,6 +18,7 @@ #include <linux/workqueue.h> #include <linux/vfio_ccw.h> #include <linux/vfio.h> +#include <linux/mdev.h> #include <asm/crw.h> #include <asm/debug.h> @@ -72,7 +73,6 @@ struct vfio_ccw_crw { * @sch: pointer to the subchannel * @state: internal state of the device * @completion: synchronization helper of the I/O completion - * @avail: available for creating a mediated device * @io_region: MMIO region to input/output I/O arguments/results * @io_mutex: protect against concurrent update of I/O regions * @region: additional regions for other subchannel operations @@ -88,13 +88,14 @@ struct vfio_ccw_crw { * @req_trigger: eventfd ctx for signaling userspace to return device * @io_work: work for deferral process of I/O handling * @crw_work: work for deferral process of CRW handling + * @release_comp: synchronization helper for vfio device release + * @parent: parent data structures for mdevs created */ struct vfio_ccw_private { struct vfio_device vdev; struct subchannel *sch; int state; struct completion *completion; - atomic_t avail; struct ccw_io_region *io_region; struct mutex io_mutex; struct vfio_ccw_region *region; @@ -113,6 +114,12 @@ struct vfio_ccw_private { struct eventfd_ctx *req_trigger; struct work_struct io_work; struct work_struct crw_work; + + struct completion release_comp; + + struct mdev_parent parent; + struct mdev_type mdev_type; + struct mdev_type *mdev_types[1]; } __aligned(8); int vfio_ccw_sch_quiesce(struct subchannel *sch); diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 6c8c41fac4e1..0b4cc8c597ae 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -684,42 +684,41 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm, AP_DOMAINS); } -static int vfio_ap_mdev_probe(struct mdev_device *mdev) +static int vfio_ap_mdev_init_dev(struct vfio_device *vdev) { - struct ap_matrix_mdev *matrix_mdev; - int ret; - - if ((atomic_dec_if_positive(&matrix_dev->available_instances) < 0)) - return -EPERM; - - matrix_mdev = kzalloc(sizeof(*matrix_mdev), GFP_KERNEL); - if (!matrix_mdev) { - ret = -ENOMEM; - goto err_dec_available; - } - vfio_init_group_dev(&matrix_mdev->vdev, &mdev->dev, - &vfio_ap_matrix_dev_ops); + struct ap_matrix_mdev *matrix_mdev = + container_of(vdev, struct ap_matrix_mdev, vdev); - matrix_mdev->mdev = mdev; + matrix_mdev->mdev = to_mdev_device(vdev->dev); vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->matrix); matrix_mdev->pqap_hook = handle_pqap; vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb); hash_init(matrix_mdev->qtable.queues); + return 0; +} + +static int vfio_ap_mdev_probe(struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev; + int ret; + + matrix_mdev = vfio_alloc_device(ap_matrix_mdev, vdev, &mdev->dev, + &vfio_ap_matrix_dev_ops); + if (IS_ERR(matrix_mdev)) + return PTR_ERR(matrix_mdev); + ret = vfio_register_emulated_iommu_dev(&matrix_mdev->vdev); if (ret) - goto err_list; + goto err_put_vdev; dev_set_drvdata(&mdev->dev, matrix_mdev); mutex_lock(&matrix_dev->mdevs_lock); list_add(&matrix_mdev->node, &matrix_dev->mdev_list); mutex_unlock(&matrix_dev->mdevs_lock); return 0; -err_list: - vfio_uninit_group_dev(&matrix_mdev->vdev); - kfree(matrix_mdev); -err_dec_available: - atomic_inc(&matrix_dev->available_instances); +err_put_vdev: + vfio_put_device(&matrix_mdev->vdev); return ret; } @@ -766,6 +765,11 @@ static void vfio_ap_mdev_unlink_fr_queues(struct ap_matrix_mdev *matrix_mdev) } } +static void vfio_ap_mdev_release_dev(struct vfio_device *vdev) +{ + vfio_free_device(vdev); +} + static void vfio_ap_mdev_remove(struct mdev_device *mdev) { struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(&mdev->dev); @@ -779,54 +783,9 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev) list_del(&matrix_mdev->node); mutex_unlock(&matrix_dev->mdevs_lock); mutex_unlock(&matrix_dev->guests_lock); - vfio_uninit_group_dev(&matrix_mdev->vdev); - kfree(matrix_mdev); - atomic_inc(&matrix_dev->available_instances); -} - -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_AP_MDEV_NAME_HWVIRT); + vfio_put_device(&matrix_mdev->vdev); } -static MDEV_TYPE_ATTR_RO(name); - -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) -{ - return sprintf(buf, "%d\n", - atomic_read(&matrix_dev->available_instances)); -} - -static MDEV_TYPE_ATTR_RO(available_instances); - -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_AP_STRING); -} - -static MDEV_TYPE_ATTR_RO(device_api); - -static struct attribute *vfio_ap_mdev_type_attrs[] = { - &mdev_type_attr_name.attr, - &mdev_type_attr_device_api.attr, - &mdev_type_attr_available_instances.attr, - NULL, -}; - -static struct attribute_group vfio_ap_mdev_hwvirt_type_group = { - .name = VFIO_AP_MDEV_TYPE_HWVIRT, - .attrs = vfio_ap_mdev_type_attrs, -}; - -static struct attribute_group *vfio_ap_mdev_type_groups[] = { - &vfio_ap_mdev_hwvirt_type_group, - NULL, -}; - #define MDEV_SHARING_ERR "Userspace may not re-assign queue %02lx.%04lx " \ "already assigned to %s" @@ -984,6 +943,11 @@ static ssize_t assign_adapter_store(struct device *dev, goto done; } + if (test_bit_inv(apid, matrix_mdev->matrix.apm)) { + ret = count; + goto done; + } + set_bit_inv(apid, matrix_mdev->matrix.apm); ret = vfio_ap_mdev_validate_masks(matrix_mdev); @@ -1109,6 +1073,11 @@ static ssize_t unassign_adapter_store(struct device *dev, goto done; } + if (!test_bit_inv(apid, matrix_mdev->matrix.apm)) { + ret = count; + goto done; + } + clear_bit_inv((unsigned long)apid, matrix_mdev->matrix.apm); vfio_ap_mdev_hot_unplug_adapter(matrix_mdev, apid); ret = count; @@ -1183,6 +1152,11 @@ static ssize_t assign_domain_store(struct device *dev, goto done; } + if (test_bit_inv(apqi, matrix_mdev->matrix.aqm)) { + ret = count; + goto done; + } + set_bit_inv(apqi, matrix_mdev->matrix.aqm); ret = vfio_ap_mdev_validate_masks(matrix_mdev); @@ -1286,6 +1260,11 @@ static ssize_t unassign_domain_store(struct device *dev, goto done; } + if (!test_bit_inv(apqi, matrix_mdev->matrix.aqm)) { + ret = count; + goto done; + } + clear_bit_inv((unsigned long)apqi, matrix_mdev->matrix.aqm); vfio_ap_mdev_hot_unplug_domain(matrix_mdev, apqi); ret = count; @@ -1329,6 +1308,11 @@ static ssize_t assign_control_domain_store(struct device *dev, goto done; } + if (test_bit_inv(id, matrix_mdev->matrix.adm)) { + ret = count; + goto done; + } + /* Set the bit in the ADM (bitmask) corresponding to the AP control * domain number (id). The bits in the mask, from most significant to * least significant, correspond to IDs 0 up to the one less than the @@ -1378,6 +1362,11 @@ static ssize_t unassign_control_domain_store(struct device *dev, goto done; } + if (!test_bit_inv(domid, matrix_mdev->matrix.adm)) { + ret = count; + goto done; + } + clear_bit_inv(domid, matrix_mdev->matrix.adm); if (test_bit_inv(domid, matrix_mdev->shadow_apcb.adm)) { @@ -1794,6 +1783,8 @@ static const struct attribute_group vfio_queue_attr_group = { }; static const struct vfio_device_ops vfio_ap_matrix_dev_ops = { + .init = vfio_ap_mdev_init_dev, + .release = vfio_ap_mdev_release_dev, .open_device = vfio_ap_mdev_open_device, .close_device = vfio_ap_mdev_close_device, .ioctl = vfio_ap_mdev_ioctl, @@ -1801,6 +1792,8 @@ static const struct vfio_device_ops vfio_ap_matrix_dev_ops = { }; static struct mdev_driver vfio_ap_matrix_driver = { + .device_api = VFIO_DEVICE_API_AP_STRING, + .max_instances = MAX_ZDEV_ENTRIES_EXT, .driver = { .name = "vfio_ap_mdev", .owner = THIS_MODULE, @@ -1809,20 +1802,22 @@ static struct mdev_driver vfio_ap_matrix_driver = { }, .probe = vfio_ap_mdev_probe, .remove = vfio_ap_mdev_remove, - .supported_type_groups = vfio_ap_mdev_type_groups, }; int vfio_ap_mdev_register(void) { int ret; - atomic_set(&matrix_dev->available_instances, MAX_ZDEV_ENTRIES_EXT); - ret = mdev_register_driver(&vfio_ap_matrix_driver); if (ret) return ret; - ret = mdev_register_device(&matrix_dev->device, &vfio_ap_matrix_driver); + matrix_dev->mdev_type.sysfs_name = VFIO_AP_MDEV_TYPE_HWVIRT; + matrix_dev->mdev_type.pretty_name = VFIO_AP_MDEV_NAME_HWVIRT; + matrix_dev->mdev_types[0] = &matrix_dev->mdev_type; + ret = mdev_register_parent(&matrix_dev->parent, &matrix_dev->device, + &vfio_ap_matrix_driver, + matrix_dev->mdev_types, 1); if (ret) goto err_driver; return 0; @@ -1834,7 +1829,7 @@ err_driver: void vfio_ap_mdev_unregister(void) { - mdev_unregister_device(&matrix_dev->device); + mdev_unregister_parent(&matrix_dev->parent); mdev_unregister_driver(&vfio_ap_matrix_driver); } diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index d782cf463eab..976a65f32e7d 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -13,7 +13,6 @@ #define _VFIO_AP_PRIVATE_H_ #include <linux/types.h> -#include <linux/device.h> #include <linux/mdev.h> #include <linux/delay.h> #include <linux/mutex.h> @@ -30,7 +29,6 @@ * struct ap_matrix_dev - Contains the data for the matrix device. * * @device: generic device structure associated with the AP matrix device - * @available_instances: number of mediated matrix devices that can be created * @info: the struct containing the output from the PQAP(QCI) instruction * @mdev_list: the list of mediated matrix devices created * @mdevs_lock: mutex for locking the AP matrix device. This lock will be @@ -47,12 +45,14 @@ */ struct ap_matrix_dev { struct device device; - atomic_t available_instances; struct ap_config_info info; struct list_head mdev_list; struct mutex mdevs_lock; /* serializes access to each ap_matrix_mdev */ struct ap_driver *vfio_ap_drv; struct mutex guests_lock; /* serializes access to each KVM guest */ + struct mdev_parent parent; + struct mdev_type mdev_type; + struct mdev_type *mdev_types[1]; }; extern struct ap_matrix_dev *matrix_dev; diff --git a/drivers/s390/crypto/zcrypt_msgtype6.c b/drivers/s390/crypto/zcrypt_msgtype6.c index 8fb34b8eeb18..5ad251477593 100644 --- a/drivers/s390/crypto/zcrypt_msgtype6.c +++ b/drivers/s390/crypto/zcrypt_msgtype6.c @@ -342,7 +342,10 @@ static int xcrb_msg_to_type6cprb_msgx(bool userspace, struct ap_message *ap_msg, }; struct { struct type6_hdr hdr; - struct CPRBX cprbx; + union { + struct CPRBX cprbx; + DECLARE_FLEX_ARRAY(u8, userdata); + }; } __packed * msg = ap_msg->msg; int rcblen = CEIL4(xcrb->request_control_blk_length); @@ -403,7 +406,8 @@ static int xcrb_msg_to_type6cprb_msgx(bool userspace, struct ap_message *ap_msg, msg->hdr.fromcardlen2 = xcrb->reply_data_length; /* prepare CPRB */ - if (z_copy_from_user(userspace, &msg->cprbx, xcrb->request_control_blk_addr, + if (z_copy_from_user(userspace, msg->userdata, + xcrb->request_control_blk_addr, xcrb->request_control_blk_length)) return -EFAULT; if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) > @@ -469,9 +473,14 @@ static int xcrb_msg_to_type6_ep11cprb_msgx(bool userspace, struct ap_message *ap struct { struct type6_hdr hdr; - struct ep11_cprb cprbx; - unsigned char pld_tag; /* fixed value 0x30 */ - unsigned char pld_lenfmt; /* payload length format */ + union { + struct { + struct ep11_cprb cprbx; + unsigned char pld_tag; /* fixed value 0x30 */ + unsigned char pld_lenfmt; /* length format */ + } __packed; + DECLARE_FLEX_ARRAY(u8, userdata); + }; } __packed * msg = ap_msg->msg; struct pld_hdr { @@ -500,7 +509,7 @@ static int xcrb_msg_to_type6_ep11cprb_msgx(bool userspace, struct ap_message *ap msg->hdr.fromcardlen1 = xcrb->resp_len; /* Import CPRB data from the ioctl input parameter */ - if (z_copy_from_user(userspace, &msg->cprbx.cprb_len, + if (z_copy_from_user(userspace, msg->userdata, (char __force __user *)xcrb->req, xcrb->req_len)) { return -EFAULT; } diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c index e0fdd54bfeb7..37b551bd43bf 100644 --- a/drivers/s390/net/ctcm_main.c +++ b/drivers/s390/net/ctcm_main.c @@ -1566,7 +1566,7 @@ static int ctcm_new_device(struct ccwgroup_device *cgdev) goto out_dev; } - strlcpy(priv->fsm->name, dev->name, sizeof(priv->fsm->name)); + strscpy(priv->fsm->name, dev->name, sizeof(priv->fsm->name)); dev_info(&dev->dev, "setup OK : r/w = %s/%s, protocol : %d\n", diff --git a/drivers/s390/net/fsm.c b/drivers/s390/net/fsm.c index 98c4864932d2..0ff61d00feb1 100644 --- a/drivers/s390/net/fsm.c +++ b/drivers/s390/net/fsm.c @@ -28,7 +28,7 @@ init_fsm(char *name, const char **state_names, const char **event_names, int nr_ "fsm(%s): init_fsm: Couldn't alloc instance\n", name); return NULL; } - strlcpy(this->name, name, sizeof(this->name)); + strscpy(this->name, name, sizeof(this->name)); init_waitqueue_head(&this->wait_q); f = kzalloc(sizeof(fsm), order); diff --git a/drivers/s390/net/qeth_ethtool.c b/drivers/s390/net/qeth_ethtool.c index 9eba0a32e9f9..e250f49535fa 100644 --- a/drivers/s390/net/qeth_ethtool.c +++ b/drivers/s390/net/qeth_ethtool.c @@ -188,9 +188,9 @@ static void qeth_get_drvinfo(struct net_device *dev, { struct qeth_card *card = dev->ml_priv; - strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3", + strscpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3", sizeof(info->driver)); - strlcpy(info->fw_version, card->info.mcl_level, + strscpy(info->fw_version, card->info.mcl_level, sizeof(info->fw_version)); snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s", CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card)); diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 2d4436cbcb47..9dc935886e9f 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1133,7 +1133,7 @@ static int qeth_l2_setup_netdev(struct qeth_card *card) PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)); } - netif_napi_add(card->dev, &card->napi, qeth_poll, NAPI_POLL_WEIGHT); + netif_napi_add(card->dev, &card->napi, qeth_poll); return register_netdev(card->dev); } @@ -1530,8 +1530,8 @@ static void qeth_addr_change_event(struct qeth_card *card, else INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker); data->card = card; - memcpy(&data->ac_event, hostevs, - sizeof(struct qeth_ipacmd_addr_change) + extrasize); + data->ac_event = *hostevs; + memcpy(data->ac_event.entry, hostevs->entry, extrasize); queue_delayed_work(card->event_wq, &data->dwork, 0); } diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 8d44bce0477a..d8487a10cd55 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1910,7 +1910,7 @@ static int qeth_l3_setup_netdev(struct qeth_card *card) netif_set_tso_max_size(card->dev, PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1)); - netif_napi_add(card->dev, &card->napi, qeth_poll, NAPI_POLL_WEIGHT); + netif_napi_add(card->dev, &card->napi, qeth_poll); return register_netdev(card->dev); } diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index fd2f1c31bd21..df782646e856 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -103,7 +103,7 @@ static void __init zfcp_init_device_setup(char *devstr) token = strsep(&str, ","); if (!token || strlen(token) >= ZFCP_BUS_ID_SIZE) goto err_out; - strlcpy(busid, token, ZFCP_BUS_ID_SIZE); + strscpy(busid, token, ZFCP_BUS_ID_SIZE); token = strsep(&str, ","); if (!token || kstrtoull(token, 0, (unsigned long long *) &wwpn)) diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c index b61acbb09be3..77917b339870 100644 --- a/drivers/s390/scsi/zfcp_fc.c +++ b/drivers/s390/scsi/zfcp_fc.c @@ -885,7 +885,7 @@ static int zfcp_fc_gspn(struct zfcp_adapter *adapter, dev_name(&adapter->ccw_device->dev), init_utsname()->nodename); else - strlcpy(fc_host_symbolic_name(adapter->scsi_host), + strscpy(fc_host_symbolic_name(adapter->scsi_host), gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE); return 0; |