diff options
| author | Stefan Weinhuber <wein@de.ibm.com> | 2006-03-24 03:15:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-24 07:33:17 -0800 |
| commit | 20c644680af1ef9a6b36c0873f59498c98b07ab1 (patch) | |
| tree | af2e50faeb690b7aacf7be3480f08f0a6ec0b56f /drivers/s390/block/dasd.c | |
| parent | 554a826e0a29f1a88e5a5332f0718c059885ec17 (diff) | |
[PATCH] s390: dasd extended error reporting
The DASD extended error reporting is a facility that allows to get detailed
information about certain problems in the DASD I/O. This information can be
used to implement fail-over applications that can recover these problems.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/block/dasd.c')
| -rw-r--r-- | drivers/s390/block/dasd.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 9e0b371ebe6..f32f7447588 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -151,6 +151,8 @@ 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_eer_disable(device); /* Forget the discipline information. */ if (device->discipline) module_put(device->discipline->owner); @@ -892,6 +894,9 @@ dasd_handle_state_change_pending(struct dasd_device *device) struct dasd_ccw_req *cqr; struct list_head *l, *n; + /* First of all start sense subsystem status request. */ + dasd_eer_snss(device); + device->stopped &= ~DASD_STOPPED_PENDING; /* restart all 'running' IO on queue */ @@ -1111,6 +1116,19 @@ restart: } goto restart; } + + /* First of all call extended error reporting. */ + if (dasd_eer_enabled(device) && + cqr->status == DASD_CQR_FAILED) { + dasd_eer_write(device, cqr, DASD_EER_FATALERROR); + + /* 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); @@ -1248,7 +1266,8 @@ __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) && + (!dasd_eer_enabled(device))) { cqr->status = DASD_CQR_FAILED; dasd_schedule_bh(device); } @@ -1807,6 +1826,7 @@ dasd_exit(void) #ifdef CONFIG_PROC_FS dasd_proc_exit(); #endif + dasd_eer_exit(); if (dasd_page_cache != NULL) { kmem_cache_destroy(dasd_page_cache); dasd_page_cache = NULL; @@ -2003,6 +2023,9 @@ 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_eer_write(device, NULL, DASD_EER_NOPATH); + if (device->state < DASD_STATE_BASIC) break; /* Device is active. We want to keep it. */ @@ -2060,6 +2083,7 @@ dasd_generic_auto_online (struct ccw_driver *dasd_discipline_driver) put_driver(drv); } + static int __init dasd_init(void) { @@ -2092,6 +2116,9 @@ dasd_init(void) rc = dasd_parse(); if (rc) goto failed; + rc = dasd_eer_init(); + if (rc) + goto failed; #ifdef CONFIG_PROC_FS rc = dasd_proc_init(); if (rc) |