diff options
| author | Hannes Reinecke <hare@suse.de> | 2013-01-30 09:26:16 +0000 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-07-01 17:31:22 +0200 |
| commit | d1ffc1f8660e749a2683f19ee7cfdd837568b37a (patch) | |
| tree | d4a054ae9e2b19072ed32599e36feb52f7fc67e0 | |
| parent | f6f80340308cdcb84db45d3abf95f23d5b66051d (diff) | |
| download | lwn-d1ffc1f8660e749a2683f19ee7cfdd837568b37a.tar.gz lwn-d1ffc1f8660e749a2683f19ee7cfdd837568b37a.zip | |
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>
| -rw-r--r-- | block/blk-core.c | 3 | ||||
| -rw-r--r-- | 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; } |