From d1ffc1f8660e749a2683f19ee7cfdd837568b37a Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Wed, 30 Jan 2013 09:26:16 +0000 Subject: [PATCH] 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 Signed-off-by: Hannes Reinecke Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky --- block/blk-core.c | 3 +++ drivers/s390/block/dasd.c | 16 +++++++++++++--- 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index d5745b5833c9..321443226888 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2315,6 +2315,9 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes) case -EBADE: error_type = "critical nexus"; break; + case -ETIMEDOUT: + error_type = "timeout"; + break; case -EIO: default: error_type = "I/O"; diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 87478becedb0..b97624bf183d 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -2183,7 +2183,7 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible) 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 @@ static void __dasd_cleanup_cqr(struct dasd_ccw_req *cqr) 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 @@ static void __dasd_block_start_head(struct dasd_block *block) 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; } -- 2.11.0