diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bio.h | 26 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 15 |
2 files changed, 29 insertions, 12 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index dc3cec386a9..1c91a176b9a 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -136,25 +136,30 @@ struct bio { * bit 2 -- barrier * Insert a serialization point in the IO queue, forcing previously * submitted IO to be completed before this oen is issued. - * bit 3 -- fail fast, don't want low level driver retries - * bit 4 -- synchronous I/O hint: the block layer will unplug immediately + * bit 3 -- synchronous I/O hint: the block layer will unplug immediately * Note that this does NOT indicate that the IO itself is sync, just * that the block layer will not postpone issue of this IO by plugging. - * bit 5 -- metadata request + * bit 4 -- metadata request * Used for tracing to differentiate metadata and data IO. May also * get some preferential treatment in the IO scheduler - * bit 6 -- discard sectors + * bit 5 -- discard sectors * Informs the lower level device that this range of sectors is no longer * used by the file system and may thus be freed by the device. Used * for flash based storage. + * bit 6 -- fail fast device errors + * bit 7 -- fail fast transport errors + * bit 8 -- fail fast driver errors + * Don't want driver retries for any fast fail whatever the reason. */ #define BIO_RW 0 /* Must match RW in req flags (blkdev.h) */ #define BIO_RW_AHEAD 1 /* Must match FAILFAST in req flags */ #define BIO_RW_BARRIER 2 -#define BIO_RW_FAILFAST 3 -#define BIO_RW_SYNC 4 -#define BIO_RW_META 5 -#define BIO_RW_DISCARD 6 +#define BIO_RW_SYNC 3 +#define BIO_RW_META 4 +#define BIO_RW_DISCARD 5 +#define BIO_RW_FAILFAST_DEV 6 +#define BIO_RW_FAILFAST_TRANSPORT 7 +#define BIO_RW_FAILFAST_DRIVER 8 /* * upper 16 bits of bi_rw define the io priority of this bio @@ -181,7 +186,10 @@ struct bio { #define bio_sectors(bio) ((bio)->bi_size >> 9) #define bio_barrier(bio) ((bio)->bi_rw & (1 << BIO_RW_BARRIER)) #define bio_sync(bio) ((bio)->bi_rw & (1 << BIO_RW_SYNC)) -#define bio_failfast(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST)) +#define bio_failfast_dev(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST_DEV)) +#define bio_failfast_transport(bio) \ + ((bio)->bi_rw & (1 << BIO_RW_FAILFAST_TRANSPORT)) +#define bio_failfast_driver(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST_DRIVER)) #define bio_rw_ahead(bio) ((bio)->bi_rw & (1 << BIO_RW_AHEAD)) #define bio_rw_meta(bio) ((bio)->bi_rw & (1 << BIO_RW_META)) #define bio_discard(bio) ((bio)->bi_rw & (1 << BIO_RW_DISCARD)) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 8eed8b15f99..b4fe68fe3a5 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -87,7 +87,9 @@ enum { */ enum rq_flag_bits { __REQ_RW, /* not set, read. set, write */ - __REQ_FAILFAST, /* no low level driver retries */ + __REQ_FAILFAST_DEV, /* no driver retries of device errors */ + __REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */ + __REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */ __REQ_DISCARD, /* request to discard sectors */ __REQ_SORTED, /* elevator knows about this request */ __REQ_SOFTBARRIER, /* may not be passed by ioscheduler */ @@ -111,8 +113,10 @@ enum rq_flag_bits { }; #define REQ_RW (1 << __REQ_RW) +#define REQ_FAILFAST_DEV (1 << __REQ_FAILFAST_DEV) +#define REQ_FAILFAST_TRANSPORT (1 << __REQ_FAILFAST_TRANSPORT) +#define REQ_FAILFAST_DRIVER (1 << __REQ_FAILFAST_DRIVER) #define REQ_DISCARD (1 << __REQ_DISCARD) -#define REQ_FAILFAST (1 << __REQ_FAILFAST) #define REQ_SORTED (1 << __REQ_SORTED) #define REQ_SOFTBARRIER (1 << __REQ_SOFTBARRIER) #define REQ_HARDBARRIER (1 << __REQ_HARDBARRIER) @@ -560,7 +564,12 @@ enum { #define blk_special_request(rq) ((rq)->cmd_type == REQ_TYPE_SPECIAL) #define blk_sense_request(rq) ((rq)->cmd_type == REQ_TYPE_SENSE) -#define blk_noretry_request(rq) ((rq)->cmd_flags & REQ_FAILFAST) +#define blk_failfast_dev(rq) ((rq)->cmd_flags & REQ_FAILFAST_DEV) +#define blk_failfast_transport(rq) ((rq)->cmd_flags & REQ_FAILFAST_TRANSPORT) +#define blk_failfast_driver(rq) ((rq)->cmd_flags & REQ_FAILFAST_DRIVER) +#define blk_noretry_request(rq) (blk_failfast_dev(rq) || \ + blk_failfast_transport(rq) || \ + blk_failfast_driver(rq)) #define blk_rq_started(rq) ((rq)->cmd_flags & REQ_STARTED) #define blk_account_rq(rq) (blk_rq_started(rq) && (blk_fs_request(rq) || blk_discard_rq(rq))) |