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d0ca268b JA |
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 |