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Diffstat (limited to 'drivers/s390/block/dasd.c')
-rw-r--r--drivers/s390/block/dasd.c122
1 files changed, 108 insertions, 14 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index ef4c687e7c01..08c88fcd8963 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -7,7 +7,6 @@
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001
*
- * $Revision: 1.172 $
*/
#include <linux/config.h>
@@ -19,6 +18,7 @@
#include <linux/slab.h>
#include <linux/buffer_head.h>
#include <linux/hdreg.h>
+#include <linux/notifier.h>
#include <asm/ccwdev.h>
#include <asm/ebcdic.h>
@@ -58,6 +58,7 @@ static void dasd_int_handler(struct ccw_device *, unsigned long, struct irb *);
static void dasd_flush_ccw_queue(struct dasd_device *, int);
static void dasd_tasklet(struct dasd_device *);
static void do_kick_device(void *data);
+static void dasd_disable_eer(struct dasd_device *device);
/*
* SECTION: Operations on the device structure.
@@ -152,6 +153,8 @@ dasd_state_new_to_known(struct dasd_device *device)
static inline void
dasd_state_known_to_new(struct dasd_device * device)
{
+ /* disable extended error reporting for this device */
+ dasd_disable_eer(device);
/* Forget the discipline information. */
device->discipline = NULL;
device->state = DASD_STATE_NEW;
@@ -675,11 +678,8 @@ dasd_term_IO(struct dasd_ccw_req * cqr)
rc = ccw_device_clear(device->cdev, (long) cqr);
switch (rc) {
case 0: /* termination successful */
- if (cqr->retries > 0) {
- cqr->retries--;
- cqr->status = DASD_CQR_CLEAR;
- } else
- cqr->status = DASD_CQR_FAILED;
+ cqr->retries--;
+ cqr->status = DASD_CQR_CLEAR;
cqr->stopclk = get_clock();
DBF_DEV_EVENT(DBF_DEBUG, device,
"terminate cqr %p successful",
@@ -871,6 +871,9 @@ dasd_handle_state_change_pending(struct dasd_device *device)
struct dasd_ccw_req *cqr;
struct list_head *l, *n;
+ /* first of all call extended error reporting */
+ dasd_write_eer_trigger(DASD_EER_STATECHANGE, device, NULL);
+
device->stopped &= ~DASD_STOPPED_PENDING;
/* restart all 'running' IO on queue */
@@ -1090,6 +1093,19 @@ restart:
}
goto restart;
}
+
+ /* first of all call extended error reporting */
+ if (device->eer && cqr->status == DASD_CQR_FAILED) {
+ dasd_write_eer_trigger(DASD_EER_FATALERROR,
+ device, cqr);
+
+ /* restart request */
+ cqr->status = DASD_CQR_QUEUED;
+ cqr->retries = 255;
+ device->stopped |= DASD_STOPPED_QUIESCE;
+ goto restart;
+ }
+
/* Process finished ERP request. */
if (cqr->refers) {
__dasd_process_erp(device, cqr);
@@ -1227,7 +1243,8 @@ __dasd_start_head(struct dasd_device * device)
cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list);
/* check FAILFAST */
if (device->stopped & ~DASD_STOPPED_PENDING &&
- test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags)) {
+ test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
+ (!device->eer)) {
cqr->status = DASD_CQR_FAILED;
dasd_schedule_bh(device);
}
@@ -1308,7 +1325,7 @@ dasd_tasklet(struct dasd_device * device)
/* Now call the callback function of requests with final status */
list_for_each_safe(l, n, &final_queue) {
cqr = list_entry(l, struct dasd_ccw_req, list);
- list_del(&cqr->list);
+ list_del_init(&cqr->list);
if (cqr->callback != NULL)
(cqr->callback)(cqr, cqr->callback_data);
}
@@ -1393,7 +1410,9 @@ _wait_for_wakeup(struct dasd_ccw_req *cqr)
device = cqr->device;
spin_lock_irq(get_ccwdev_lock(device->cdev));
- rc = cqr->status == DASD_CQR_DONE || cqr->status == DASD_CQR_FAILED;
+ rc = ((cqr->status == DASD_CQR_DONE ||
+ cqr->status == DASD_CQR_FAILED) &&
+ list_empty(&cqr->list));
spin_unlock_irq(get_ccwdev_lock(device->cdev));
return rc;
}
@@ -1457,15 +1476,37 @@ dasd_sleep_on_interruptible(struct dasd_ccw_req * cqr)
while (!finished) {
rc = wait_event_interruptible(wait_q, _wait_for_wakeup(cqr));
if (rc != -ERESTARTSYS) {
- /* Request status is either done or failed. */
- rc = (cqr->status == DASD_CQR_FAILED) ? -EIO : 0;
+ /* Request is final (done or failed) */
+ rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
break;
}
spin_lock_irq(get_ccwdev_lock(device->cdev));
- if (cqr->status == DASD_CQR_IN_IO &&
- device->discipline->term_IO(cqr) == 0) {
- list_del(&cqr->list);
+ switch (cqr->status) {
+ case DASD_CQR_IN_IO:
+ /* terminate runnig cqr */
+ if (device->discipline->term_IO) {
+ cqr->retries = -1;
+ device->discipline->term_IO(cqr);
+ /*nished =
+ * wait (non-interruptible) for final status
+ * because signal ist still pending
+ */
+ spin_unlock_irq(get_ccwdev_lock(device->cdev));
+ wait_event(wait_q, _wait_for_wakeup(cqr));
+ spin_lock_irq(get_ccwdev_lock(device->cdev));
+ rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
+ finished = 1;
+ }
+ break;
+ case DASD_CQR_QUEUED:
+ /* request */
+ list_del_init(&cqr->list);
+ rc = -EIO;
finished = 1;
+ break;
+ default:
+ /* cqr with 'non-interruptable' status - just wait */
+ break;
}
spin_unlock_irq(get_ccwdev_lock(device->cdev));
}
@@ -1945,6 +1986,9 @@ dasd_generic_notify(struct ccw_device *cdev, int event)
switch (event) {
case CIO_GONE:
case CIO_NO_PATH:
+ /* first of all call extended error reporting */
+ dasd_write_eer_trigger(DASD_EER_NOPATH, device, NULL);
+
if (device->state < DASD_STATE_BASIC)
break;
/* Device is active. We want to keep it. */
@@ -2002,6 +2046,51 @@ dasd_generic_auto_online (struct ccw_driver *dasd_discipline_driver)
put_driver(drv);
}
+/*
+ * notifications for extended error reports
+ */
+static struct notifier_block *dasd_eer_chain;
+
+int
+dasd_register_eer_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_register(&dasd_eer_chain, nb);
+}
+
+int
+dasd_unregister_eer_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_unregister(&dasd_eer_chain, nb);
+}
+
+/*
+ * Notify the registered error reporting module of a problem
+ */
+void
+dasd_write_eer_trigger(unsigned int id, struct dasd_device *device,
+ struct dasd_ccw_req *cqr)
+{
+ if (device->eer) {
+ struct dasd_eer_trigger temp;
+ temp.id = id;
+ temp.device = device;
+ temp.cqr = cqr;
+ notifier_call_chain(&dasd_eer_chain, DASD_EER_TRIGGER,
+ (void *)&temp);
+ }
+}
+
+/*
+ * Tell the registered error reporting module to disable error reporting for
+ * a given device and to cleanup any private data structures on that device.
+ */
+static void
+dasd_disable_eer(struct dasd_device *device)
+{
+ notifier_call_chain(&dasd_eer_chain, DASD_EER_DISABLE, (void *)device);
+}
+
+
static int __init
dasd_init(void)
{
@@ -2083,6 +2172,11 @@ EXPORT_SYMBOL_GPL(dasd_generic_set_online);
EXPORT_SYMBOL_GPL(dasd_generic_set_offline);
EXPORT_SYMBOL_GPL(dasd_generic_auto_online);
+EXPORT_SYMBOL(dasd_register_eer_notifier);
+EXPORT_SYMBOL(dasd_unregister_eer_notifier);
+EXPORT_SYMBOL(dasd_write_eer_trigger);
+
+
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-21 05:20:09 +0200