| 1 | #if !defined(__BLKTRACE_H__) |
| 2 | #define __BLKTRACE_H__ 1 |
| 3 | |
| 4 | #include <asm/types.h> |
| 5 | |
| 6 | enum { |
| 7 | BLK_TC_READ = 1 << 0, /* reads */ |
| 8 | BLK_TC_WRITE = 1 << 1, /* writes */ |
| 9 | BLK_TC_BARRIER = 1 << 2, /* barrier */ |
| 10 | BLK_TC_SYNC = 1 << 3, /* barrier */ |
| 11 | BLK_TC_QUEUE = 1 << 4, /* queueing/merging */ |
| 12 | BLK_TC_REQUEUE = 1 << 5, /* requeueing */ |
| 13 | BLK_TC_ISSUE = 1 << 6, /* issue */ |
| 14 | BLK_TC_COMPLETE = 1 << 7, /* completions */ |
| 15 | BLK_TC_FS = 1 << 8, /* fs requests */ |
| 16 | BLK_TC_PC = 1 << 9, /* pc requests */ |
| 17 | |
| 18 | BLK_TC_END = 1 << 15, /* only 16-bits, reminder */ |
| 19 | }; |
| 20 | |
| 21 | #define BLK_TC_SHIFT (16) |
| 22 | #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT) |
| 23 | |
| 24 | /* |
| 25 | * Basic trace actions |
| 26 | */ |
| 27 | enum { |
| 28 | __BLK_TA_QUEUE = 1, /* queued */ |
| 29 | __BLK_TA_BACKMERGE, /* back merged to existing rq */ |
| 30 | __BLK_TA_FRONTMERGE, /* front merge to existing rq */ |
| 31 | __BLK_TA_GETRQ, /* allocated new request */ |
| 32 | __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */ |
| 33 | __BLK_TA_REQUEUE, /* request requeued */ |
| 34 | __BLK_TA_ISSUE, /* sent to driver */ |
| 35 | __BLK_TA_COMPLETE, /* completed by driver */ |
| 36 | }; |
| 37 | |
| 38 | /* |
| 39 | * Trace actions in full. Additionally, read or write is masked |
| 40 | */ |
| 41 | #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE)) |
| 42 | #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) |
| 43 | #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) |
| 44 | #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE)) |
| 45 | #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE)) |
| 46 | #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_QUEUE)) |
| 47 | #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE)) |
| 48 | #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE)) |
| 49 | |
| 50 | #define BLK_IO_TRACE_MAGIC (0x65617400) |
| 51 | #define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) |
| 52 | #define SUPPORTED_VERSION (0x02) |
| 53 | |
| 54 | struct blk_io_trace { |
| 55 | __u32 magic; |
| 56 | __u32 sequence; |
| 57 | __u64 time; |
| 58 | __u64 sector; |
| 59 | __u32 bytes; |
| 60 | __u32 action; |
| 61 | __u32 pid; |
| 62 | __u16 error; |
| 63 | __u16 pdu_len; |
| 64 | }; |
| 65 | |
| 66 | struct blk_user_trace_setup { |
| 67 | char name[32]; |
| 68 | __u16 act_mask; |
| 69 | __u32 buf_size; |
| 70 | __u32 buf_nr; |
| 71 | }; |
| 72 | |
| 73 | |
| 74 | #ifndef BLKSTARTTRACE |
| 75 | #define BLKSTARTTRACE _IOWR(0x12,115,struct blk_user_trace_setup) |
| 76 | #define BLKSTOPTRACE _IO(0x12,116) |
| 77 | #endif |
| 78 | |
| 79 | #endif |