diff options
Diffstat (limited to '')
-rw-r--r-- | include/linux/blkdev.h | 42 |
1 files changed, 15 insertions, 27 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index f3999719f828..4efd9af62e25 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -125,16 +125,23 @@ typedef __u32 __bitwise req_flags_t; #define RQF_SPECIAL_PAYLOAD ((__force req_flags_t)(1 << 18)) /* The per-zone write lock is held for this request */ #define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19)) -/* timeout is expired */ -#define RQF_MQ_TIMEOUT_EXPIRED ((__force req_flags_t)(1 << 20)) /* already slept for hybrid poll */ -#define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 21)) +#define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 20)) /* flags that prevent us from merging requests: */ #define RQF_NOMERGE_FLAGS \ (RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD) /* + * Request state for blk-mq. + */ +enum mq_rq_state { + MQ_RQ_IDLE = 0, + MQ_RQ_IN_FLIGHT = 1, + MQ_RQ_COMPLETE = 2, +}; + +/* * Try to put the fields that are referenced together in the same cacheline. * * If you modify this structure, make sure to update blk_rq_init() and @@ -230,32 +237,14 @@ struct request { unsigned short write_hint; unsigned short ioprio; - unsigned int timeout; - void *special; /* opaque pointer available for LLD use */ unsigned int extra_len; /* length of alignment and padding */ - /* - * On blk-mq, the lower bits of ->gstate (generation number and - * state) carry the MQ_RQ_* state value and the upper bits the - * generation number which is monotonically incremented and used to - * distinguish the reuse instances. - * - * ->gstate_seq allows updates to ->gstate and other fields - * (currently ->deadline) during request start to be read - * atomically from the timeout path, so that it can operate on a - * coherent set of information. - */ - seqcount_t gstate_seq; - u64 gstate; + enum mq_rq_state state; + refcount_t ref; - /* - * ->aborted_gstate is used by the timeout to claim a specific - * recycle instance of this request. See blk_mq_timeout_work(). - */ - struct u64_stats_sync aborted_gstate_sync; - u64 aborted_gstate; + unsigned int timeout; /* access through blk_rq_set_deadline, blk_rq_deadline */ unsigned long __deadline; @@ -337,9 +326,8 @@ typedef int (init_rq_fn)(struct request_queue *, struct request *, gfp_t); typedef void (exit_rq_fn)(struct request_queue *, struct request *); enum blk_eh_timer_return { - BLK_EH_NOT_HANDLED, - BLK_EH_HANDLED, - BLK_EH_RESET_TIMER, + BLK_EH_DONE, /* drivers has completed the command */ + BLK_EH_RESET_TIMER, /* reset timer and try again */ }; typedef enum blk_eh_timer_return (rq_timed_out_fn)(struct request *); |