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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 */ | |
bfc70ad5 | 20 | BLK_TC_NOTIFY = 1 << 10, /* special message */ |
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21 | |
22 | BLK_TC_END = 1 << 15, /* only 16-bits, reminder */ | |
23 | }; | |
24 | ||
25 | #define BLK_TC_SHIFT (16) | |
26 | #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT) | |
27 | ||
28 | /* | |
29 | * Basic trace actions | |
30 | */ | |
31 | enum { | |
32 | __BLK_TA_QUEUE = 1, /* queued */ | |
33 | __BLK_TA_BACKMERGE, /* back merged to existing rq */ | |
34 | __BLK_TA_FRONTMERGE, /* front merge to existing rq */ | |
35 | __BLK_TA_GETRQ, /* allocated new request */ | |
36 | __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */ | |
37 | __BLK_TA_REQUEUE, /* request requeued */ | |
38 | __BLK_TA_ISSUE, /* sent to driver */ | |
39 | __BLK_TA_COMPLETE, /* completed by driver */ | |
88b1a526 | 40 | __BLK_TA_PLUG, /* queue was plugged */ |
3639a11e JA |
41 | __BLK_TA_UNPLUG_IO, /* queue was unplugged by io */ |
42 | __BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */ | |
b6076a9b | 43 | __BLK_TA_INSERT, /* insert request */ |
93f1c611 JA |
44 | __BLK_TA_SPLIT, /* bio was split */ |
45 | __BLK_TA_BOUNCE, /* bio was bounced */ | |
a8f30e64 | 46 | __BLK_TA_REMAP, /* bio was remapped */ |
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47 | }; |
48 | ||
49 | /* | |
50 | * Trace actions in full. Additionally, read or write is masked | |
51 | */ | |
52 | #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
53 | #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
54 | #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
55 | #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
56 | #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
57 | #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE)) | |
58 | #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE)) | |
59 | #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE)) | |
88b1a526 | 60 | #define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE)) |
3639a11e JA |
61 | #define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE)) |
62 | #define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE)) | |
b6076a9b | 63 | #define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE)) |
93f1c611 JA |
64 | #define BLK_TA_SPLIT (__BLK_TA_SPLIT) |
65 | #define BLK_TA_BOUNCE (__BLK_TA_BOUNCE) | |
a8f30e64 | 66 | #define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE)) |
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67 | |
68 | #define BLK_IO_TRACE_MAGIC 0x65617400 | |
bfc70ad5 | 69 | #define BLK_IO_TRACE_VERSION 0x07 |
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70 | |
71 | /* | |
72 | * The trace itself | |
73 | */ | |
74 | struct blk_io_trace { | |
75 | __u32 magic; /* MAGIC << 8 | version */ | |
76 | __u32 sequence; /* event number */ | |
f8fd8985 | 77 | __u64 time; /* in nanoseconds */ |
6fe4709e JA |
78 | __u64 sector; /* disk offset */ |
79 | __u32 bytes; /* transfer length */ | |
80 | __u32 action; /* what happened */ | |
81 | __u32 pid; /* who did it */ | |
bfc70ad5 | 82 | __u32 device; /* device identifier (dev_t) */ |
654aaa52 | 83 | __u32 cpu; /* on what cpu did it happen */ |
6fe4709e JA |
84 | __u16 error; /* completion error */ |
85 | __u16 pdu_len; /* length of data after this trace */ | |
86 | }; | |
87 | ||
a8f30e64 JA |
88 | /* |
89 | * The remap event | |
90 | */ | |
91 | struct blk_io_trace_remap { | |
92 | __u32 device; | |
04faffa6 | 93 | __u32 __pad; |
a8f30e64 JA |
94 | __u64 sector; |
95 | }; | |
96 | ||
6fe4709e JA |
97 | /* |
98 | * User setup structure passed with BLKSTARTTRACE | |
99 | */ | |
100 | struct blk_user_trace_setup { | |
101 | char name[32]; /* output */ | |
102 | __u16 act_mask; /* input */ | |
103 | __u32 buf_size; /* input */ | |
104 | __u32 buf_nr; /* input */ | |
6c8d81e4 JA |
105 | __u64 start_lba; |
106 | __u64 end_lba; | |
107 | __u32 pid; | |
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108 | }; |
109 | ||
ed71a31e JA |
110 | #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) |
111 | #define BLKTRACESTART _IO(0x12,116) | |
112 | #define BLKTRACESTOP _IO(0x12,117) | |
113 | #define BLKTRACETEARDOWN _IO(0x12,118) | |
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114 | |
115 | #endif |