scsw_cstat(&irb->scsw) == SCHN_STAT_INCORR_LEN;
}
+static int dasd_ese_oos_cond(u8 *sense)
+{
+ return sense[0] & SNS0_EQUIPMENT_CHECK &&
+ sense[1] & SNS1_PERM_ERR &&
+ sense[1] & SNS1_WRITE_INHIBITED &&
+ sense[25] == 0x01;
+}
+
/*
* Interrupt handler for "normal" ssch-io based dasd devices.
*/
test_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
nrf_suppressed = (sense[1] & SNS1_NO_REC_FOUND) &&
test_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
+
+ /*
+ * Extent pool probably out-of-space.
+ * Stop device and check exhaust level.
+ */
+ if (dasd_ese_oos_cond(sense)) {
+ dasd_generic_space_exhaust(device, cqr);
+ device->discipline->ext_pool_exhaust(device, cqr);
+ dasd_put_device(device);
+ return;
+ }
}
if (!(fp_suppressed || nrf_suppressed))
device->discipline->dump_sense_dbf(device, irb, "int");
static int __dasd_device_is_unusable(struct dasd_device *device,
struct dasd_ccw_req *cqr)
{
- int mask = ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM);
+ int mask = ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM | DASD_STOPPED_NOSPC);
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
!test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
}
EXPORT_SYMBOL_GPL(dasd_generic_verify_path);
+void dasd_generic_space_exhaust(struct dasd_device *device,
+ struct dasd_ccw_req *cqr)
+{
+ dasd_eer_write(device, NULL, DASD_EER_NOSPC);
+
+ if (device->state < DASD_STATE_BASIC)
+ return;
+
+ if (cqr->status == DASD_CQR_IN_IO ||
+ cqr->status == DASD_CQR_CLEAR_PENDING) {
+ cqr->status = DASD_CQR_QUEUED;
+ cqr->retries++;
+ }
+ dasd_device_set_stop_bits(device, DASD_STOPPED_NOSPC);
+ dasd_device_clear_timer(device);
+ dasd_schedule_device_bh(device);
+}
+EXPORT_SYMBOL_GPL(dasd_generic_space_exhaust);
+
+void dasd_generic_space_avail(struct dasd_device *device)
+{
+ dev_info(&device->cdev->dev, "Extent pool space is available\n");
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s", "space available");
+
+ dasd_device_remove_stop_bits(device, DASD_STOPPED_NOSPC);
+ 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->stopped)
+ wake_up(&generic_waitq);
+}
+EXPORT_SYMBOL_GPL(dasd_generic_space_avail);
+
/*
* clear active requests and requeue them to block layer if possible
*/
} *dasd_reserve_req;
static DEFINE_MUTEX(dasd_reserve_mutex);
+static struct {
+ struct dasd_ccw_req cqr;
+ struct ccw1 ccw[2];
+ char data[40];
+} *dasd_vol_info_req;
+static DEFINE_MUTEX(dasd_vol_info_mutex);
+
+struct ext_pool_exhaust_work_data {
+ struct work_struct worker;
+ struct dasd_device *device;
+ struct dasd_device *base;
+};
+
/* definitions for the path verification worker */
struct path_verification_work_data {
struct work_struct worker;
struct dasd_rssd_vsq *vsq;
struct dasd_ccw_req *cqr;
struct ccw1 *ccw;
+ int useglobal;
int rc;
/* This command cannot be executed on an alias device */
private->uid.type == UA_HYPER_PAV_ALIAS)
return 0;
+ useglobal = 0;
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */,
sizeof(*prssdp) + sizeof(*vsq), device, NULL);
if (IS_ERR(cqr)) {
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
"Could not allocate initialization request");
- return PTR_ERR(cqr);
+ mutex_lock(&dasd_vol_info_mutex);
+ useglobal = 1;
+ cqr = &dasd_vol_info_req->cqr;
+ memset(cqr, 0, sizeof(*cqr));
+ memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req));
+ cqr->cpaddr = &dasd_vol_info_req->ccw;
+ cqr->data = &dasd_vol_info_req->data;
+ cqr->magic = DASD_ECKD_MAGIC;
}
/* Prepare for Read Subsystem Data */
"Reading the volume storage information failed with rc=%d\n", rc);
}
- dasd_sfree_request(cqr, cqr->memdev);
+ if (useglobal)
+ mutex_unlock(&dasd_vol_info_mutex);
+ else
+ dasd_sfree_request(cqr, cqr->memdev);
return rc;
}
return private->vsq.logical_capacity;
}
+static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work)
+{
+ struct ext_pool_exhaust_work_data *data;
+ struct dasd_device *device;
+ struct dasd_device *base;
+
+ data = container_of(work, struct ext_pool_exhaust_work_data, worker);
+ device = data->device;
+ base = data->base;
+
+ if (!base)
+ base = device;
+ if (dasd_eckd_space_configured(base) != 0) {
+ dasd_generic_space_avail(device);
+ } else {
+ dev_warn(&device->cdev->dev, "No space left in the extent pool\n");
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space");
+ }
+
+ dasd_put_device(device);
+ kfree(data);
+}
+
+static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device,
+ struct dasd_ccw_req *cqr)
+{
+ struct ext_pool_exhaust_work_data *data;
+
+ data = kzalloc(sizeof(*data), GFP_ATOMIC);
+ if (!data)
+ return -ENOMEM;
+ INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work);
+ dasd_get_device(device);
+ data->device = device;
+
+ if (cqr->block)
+ data->base = cqr->block->base;
+ else if (cqr->basedev)
+ data->base = cqr->basedev;
+ else
+ data->base = NULL;
+
+ schedule_work(&data->worker);
+
+ return 0;
+}
+
static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device,
struct dasd_rssd_lcq *lcq)
{
cqr->retries = 255;
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
+ /* Set flags to suppress output for expected errors */
+ set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
+
return cqr;
}
device->discipline->check_attention(device, lpum);
}
+static void dasd_eckd_oos_resume(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private = device->private;
+ struct alias_pav_group *pavgroup, *tempgroup;
+ struct dasd_device *dev, *n;
+ unsigned long flags;
+
+ spin_lock_irqsave(&private->lcu->lock, flags);
+ list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
+ alias_list) {
+ if (dev->stopped & DASD_STOPPED_NOSPC)
+ dasd_generic_space_avail(dev);
+ }
+ list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
+ alias_list) {
+ if (dev->stopped & DASD_STOPPED_NOSPC)
+ dasd_generic_space_avail(dev);
+ }
+ /* devices in PAV groups */
+ list_for_each_entry_safe(pavgroup, tempgroup,
+ &private->lcu->grouplist,
+ group) {
+ list_for_each_entry_safe(dev, n, &pavgroup->baselist,
+ alias_list) {
+ if (dev->stopped & DASD_STOPPED_NOSPC)
+ dasd_generic_space_avail(dev);
+ }
+ list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
+ alias_list) {
+ if (dev->stopped & DASD_STOPPED_NOSPC)
+ dasd_generic_space_avail(dev);
+ }
+ }
+ spin_unlock_irqrestore(&private->lcu->lock, flags);
+}
+
+static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages,
+ __u8 lpum)
+{
+ struct dasd_oos_message *oos = messages;
+
+ switch (oos->code) {
+ case REPO_WARN:
+ case POOL_WARN:
+ dev_warn(&device->cdev->dev,
+ "Extent pool usage has reached a critical value\n");
+ dasd_eckd_oos_resume(device);
+ break;
+ case REPO_EXHAUST:
+ case POOL_EXHAUST:
+ dev_warn(&device->cdev->dev,
+ "Extent pool is exhausted\n");
+ break;
+ case REPO_RELIEVE:
+ case POOL_RELIEVE:
+ dev_info(&device->cdev->dev,
+ "Extent pool physical space constraint has been relieved\n");
+ break;
+ }
+
+ /* In any case, update related data */
+ dasd_eckd_read_ext_pool_info(device);
+
+ /* to make sure there is no attention left schedule work again */
+ device->discipline->check_attention(device, lpum);
+}
+
static void dasd_eckd_check_attention_work(struct work_struct *work)
{
struct check_attention_work_data *data;
rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
if (rc)
goto out;
+
if (messages->length == ATTENTION_LENGTH_CUIR &&
messages->format == ATTENTION_FORMAT_CUIR)
dasd_eckd_handle_cuir(device, messages, data->lpum);
+ if (messages->length == ATTENTION_LENGTH_OOS &&
+ messages->format == ATTENTION_FORMAT_OOS)
+ dasd_eckd_handle_oos(device, messages, data->lpum);
+
out:
dasd_put_device(device);
kfree(messages);
.ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel,
.ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld,
.ext_pool_oos = dasd_eckd_ext_pool_oos,
+ .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust,
.ese_format = dasd_eckd_ese_format,
.ese_read = dasd_eckd_ese_read,
};
GFP_KERNEL | GFP_DMA);
if (!dasd_reserve_req)
return -ENOMEM;
+ dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req),
+ GFP_KERNEL | GFP_DMA);
+ if (!dasd_vol_info_req)
+ return -ENOMEM;
path_verification_worker = kmalloc(sizeof(*path_verification_worker),
GFP_KERNEL | GFP_DMA);
if (!path_verification_worker) {
kfree(dasd_reserve_req);
+ kfree(dasd_vol_info_req);
return -ENOMEM;
}
rawpadpage = (void *)__get_free_page(GFP_KERNEL);
if (!rawpadpage) {
kfree(path_verification_worker);
kfree(dasd_reserve_req);
+ kfree(dasd_vol_info_req);
return -ENOMEM;
}
ret = ccw_driver_register(&dasd_eckd_driver);
else {
kfree(path_verification_worker);
kfree(dasd_reserve_req);
+ kfree(dasd_vol_info_req);
free_page((unsigned long)rawpadpage);
}
return ret;
projects / linux.git / commitdiff