projects / blktrace.git / blame
| Commit | Line | Data |
|---|---|---|
| 6fe4709e JA |
1 | #ifndef BLKTRACEAPI_H |
| 2 | #define BLKTRACEAPI_H | |
| 3 | ||
| 4 | #include <asm/types.h> | |
| 5 | ||
| 6 | /* | |
| 7 | * Trace categories | |
| 8 | */ | |
| 9 | enum { | |
| 10 | BLK_TC_READ = 1 << 0, /* reads */ | |
| 11 | BLK_TC_WRITE = 1 << 1, /* writes */ | |
| 12 | BLK_TC_BARRIER = 1 << 2, /* barrier */ | |
| 13 | BLK_TC_SYNC = 1 << 3, /* barrier */ | |
| 14 | BLK_TC_QUEUE = 1 << 4, /* queueing/merging */ | |
| 15 | BLK_TC_REQUEUE = 1 << 5, /* requeueing */ | |
| 16 | BLK_TC_ISSUE = 1 << 6, /* issue */ | |
| 17 | BLK_TC_COMPLETE = 1 << 7, /* completions */ | |
| 18 | BLK_TC_FS = 1 << 8, /* fs requests */ | |
| 19 | BLK_TC_PC = 1 << 9, /* pc requests */ | |
| 20 | ||
| 21 | BLK_TC_END = 1 << 15, /* only 16-bits, reminder */ | |
| 22 | }; | |
| 23 | ||
| 24 | #define BLK_TC_SHIFT (16) | |
| 25 | #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT) | |
| 26 | ||
| 27 | /* | |
| 28 | * Basic trace actions | |
| 29 | */ | |
| 30 | enum { | |
| 31 | __BLK_TA_QUEUE = 1, /* queued */ | |
| 32 | __BLK_TA_BACKMERGE, /* back merged to existing rq */ | |
| 33 | __BLK_TA_FRONTMERGE, /* front merge to existing rq */ | |
| 34 | __BLK_TA_GETRQ, /* allocated new request */ | |
| 35 | __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */ | |
| 36 | __BLK_TA_REQUEUE, /* request requeued */ | |
| 37 | __BLK_TA_ISSUE, /* sent to driver */ | |
| 38 | __BLK_TA_COMPLETE, /* completed by driver */ | |
| 39 | }; | |
| 40 | ||
| 41 | /* | |
| 42 | * Trace actions in full. Additionally, read or write is masked | |
| 43 | */ | |
| 44 | #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 45 | #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 46 | #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 47 | #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 48 | #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 49 | #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE)) | |
| 50 | #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE)) | |
| 51 | #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE)) | |
| 52 | ||
| 53 | #define BLK_IO_TRACE_MAGIC 0x65617400 | |
| d5396421 | 54 | #define BLK_IO_TRACE_VERSION 0x03 |
| 6fe4709e JA |
55 | |
| 56 | /* | |
| 57 | * The trace itself | |
| 58 | */ | |
| 59 | struct blk_io_trace { | |
| 60 | __u32 magic; /* MAGIC << 8 | version */ | |
| 61 | __u32 sequence; /* event number */ | |
| 62 | __u64 time; /* in microseconds */ | |
| 63 | __u64 sector; /* disk offset */ | |
| 64 | __u32 bytes; /* transfer length */ | |
| 65 | __u32 action; /* what happened */ | |
| 66 | __u32 pid; /* who did it */ | |
| d5396421 | 67 | __u16 cpu; /* on what cpu did it happen */ |
| 6fe4709e JA |
68 | __u16 error; /* completion error */ |
| 69 | __u16 pdu_len; /* length of data after this trace */ | |
| 70 | }; | |
| 71 | ||
| 72 | /* | |
| 73 | * User setup structure passed with BLKSTARTTRACE | |
| 74 | */ | |
| 75 | struct blk_user_trace_setup { | |
| 76 | char name[32]; /* output */ | |
| 77 | __u16 act_mask; /* input */ | |
| 78 | __u32 buf_size; /* input */ | |
| 79 | __u32 buf_nr; /* input */ | |
| 80 | }; | |
| 81 | ||
| 82 | #define BLKSTARTTRACE _IOWR(0x12,115,struct blk_user_trace_setup) | |
| 83 | #define BLKSTOPTRACE _IO(0x12,116) | |
| 84 | ||
| 85 | #endif |