diff options
Diffstat (limited to 'drivers/s390/block/dasd.c')
| -rw-r--r-- | drivers/s390/block/dasd.c | 76 |
1 files changed, 75 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index abdf1ee633e7..08c88fcd8963 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -18,6 +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> @@ -57,6 +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. @@ -151,6 +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; @@ -867,6 +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 */ @@ -1086,6 +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); @@ -1223,7 +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); } @@ -1965,6 +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. */ @@ -2022,6 +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) { @@ -2103,6 +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 |