diff options
| author | Horst Hummel <horst.hummel@de.ibm.com> | 2006-01-06 00:19:15 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:33:50 -0800 |
| commit | 1c01b8a5963aec60488c1c97d67cffd8b5275e3f (patch) | |
| tree | 48eb6c300541d77ff2cc5d8949ce5788fab1d82f /drivers/s390/block/dasd_eckd.c | |
| parent | 9a7af289660dc749d7c58234191601046a9bf488 (diff) | |
[PATCH] s390: dasd failfast support
To properly support multipath-failover handling, the linux block layer has
introduced a special request flag, 'REQ_FAILFAST'. This flag is now used to
return requests immediately in case the device is not operational.
Signed-off-by: Horst Hummel <horst.hummel@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_eckd.c')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 811060e10c0..efc4cf62496 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -7,7 +7,7 @@ * Bugreports.to..: <Linux390@de.ibm.com> * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 * - * $Revision: 1.71 $ + * $Revision: 1.74 $ */ #include <linux/config.h> @@ -1136,6 +1136,8 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) recid++; } } + if (req->flags & REQ_FAILFAST) + set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->device = device; cqr->expires = 5 * 60 * HZ; /* 5 minutes */ cqr->lpm = private->path_data.ppm; @@ -1252,6 +1254,7 @@ dasd_eckd_release(struct block_device *bdev, int no, long args) cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; cqr->device = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); + set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 0; cqr->expires = 2 * HZ; cqr->buildclk = get_clock(); @@ -1296,6 +1299,7 @@ dasd_eckd_reserve(struct block_device *bdev, int no, long args) cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; cqr->device = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); + set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 0; cqr->expires = 2 * HZ; cqr->buildclk = get_clock(); @@ -1339,6 +1343,7 @@ dasd_eckd_steal_lock(struct block_device *bdev, int no, long args) cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; cqr->device = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); + set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 0; cqr->expires = 2 * HZ; cqr->buildclk = get_clock(); |