block/dasd: detailed I/O errors
The DASD driver is using FASTFAIL as an equivalent to the
transport errors in SCSI. And the 'steal lock' function maps
roughly to a reservation error. So we should be returning the
appropriate error codes when completing a request.
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 87478be..b97624b 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2183,7 +2183,7 @@
test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
(!dasd_eer_enabled(device))) {
cqr->status = DASD_CQR_FAILED;
- cqr->intrc = -EAGAIN;
+ cqr->intrc = -ENOLINK;
continue;
}
/* Don't try to start requests if device is stopped */
@@ -2590,8 +2590,17 @@
req = (struct request *) cqr->callback_data;
dasd_profile_end(cqr->block, cqr, req);
status = cqr->block->base->discipline->free_cp(cqr, req);
- if (status <= 0)
- error = status ? status : -EIO;
+ if (status < 0)
+ error = status;
+ else if (status == 0) {
+ if (cqr->intrc == -EPERM)
+ error = -EBADE;
+ else if (cqr->intrc == -ENOLINK ||
+ cqr->intrc == -ETIMEDOUT)
+ error = cqr->intrc;
+ else
+ error = -EIO;
+ }
__blk_end_request_all(req, error);
}
@@ -2692,6 +2701,7 @@
test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
(!dasd_eer_enabled(block->base))) {
cqr->status = DASD_CQR_FAILED;
+ cqr->intrc = -ENOLINK;
dasd_schedule_block_bh(block);
continue;
}