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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 */ | |
88b1a526 | 39 | __BLK_TA_PLUG, /* queue was plugged */ |
3639a11e JA |
40 | __BLK_TA_UNPLUG_IO, /* queue was unplugged by io */ |
41 | __BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */ | |
b6076a9b | 42 | __BLK_TA_INSERT, /* insert request */ |
6fe4709e JA |
43 | }; |
44 | ||
45 | /* | |
46 | * Trace actions in full. Additionally, read or write is masked | |
47 | */ | |
48 | #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
49 | #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
50 | #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
51 | #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
52 | #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
53 | #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE)) | |
54 | #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE)) | |
55 | #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE)) | |
88b1a526 | 56 | #define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE)) |
3639a11e JA |
57 | #define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE)) |
58 | #define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE)) | |
b6076a9b | 59 | #define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE)) |
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60 | |
61 | #define BLK_IO_TRACE_MAGIC 0x65617400 | |
e7c9f3ff | 62 | #define BLK_IO_TRACE_VERSION 0x05 |
6fe4709e JA |
63 | |
64 | /* | |
65 | * The trace itself | |
66 | */ | |
67 | struct blk_io_trace { | |
68 | __u32 magic; /* MAGIC << 8 | version */ | |
69 | __u32 sequence; /* event number */ | |
f8fd8985 | 70 | __u64 time; /* in nanoseconds */ |
6fe4709e JA |
71 | __u64 sector; /* disk offset */ |
72 | __u32 bytes; /* transfer length */ | |
73 | __u32 action; /* what happened */ | |
74 | __u32 pid; /* who did it */ | |
654aaa52 | 75 | __u32 cpu; /* on what cpu did it happen */ |
6fe4709e JA |
76 | __u16 error; /* completion error */ |
77 | __u16 pdu_len; /* length of data after this trace */ | |
e7c9f3ff | 78 | __u32 device; /* device identifier (dev_t) */ |
654aaa52 | 79 | char comm[16]; /* task command name (TASK_COMM_LEN) */ |
6fe4709e JA |
80 | }; |
81 | ||
82 | /* | |
83 | * User setup structure passed with BLKSTARTTRACE | |
84 | */ | |
85 | struct blk_user_trace_setup { | |
86 | char name[32]; /* output */ | |
87 | __u16 act_mask; /* input */ | |
88 | __u32 buf_size; /* input */ | |
89 | __u32 buf_nr; /* input */ | |
90 | }; | |
91 | ||
92 | #define BLKSTARTTRACE _IOWR(0x12,115,struct blk_user_trace_setup) | |
93 | #define BLKSTOPTRACE _IO(0x12,116) | |
94 | ||
95 | #endif |