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gerrit-public.fairphone.software / kernel / msm-4.9 / 97d7530b83e3f515d5a3242019fdc2b5848d5a7f / . / include / uapi / linux / blktrace_api.h
blob: c590ca6bfbd9e05c1e828747859419a731be2730 [file] [log] [blame]
David Howells607ca462012-10-13 10:46:48 +0100[diff] [blame]1#ifndef _UAPIBLKTRACE_H
2#define _UAPIBLKTRACE_H
3
4#include <linux/types.h>
5
6/*
7 * Trace categories
8 */
9enum blktrace_cat {
10 BLK_TC_READ = 1 << 0, /* reads */
11 BLK_TC_WRITE = 1 << 1, /* writes */
12 BLK_TC_FLUSH = 1 << 2, /* flush */
13 BLK_TC_SYNC = 1 << 3, /* sync IO */
14 BLK_TC_SYNCIO = BLK_TC_SYNC,
15 BLK_TC_QUEUE = 1 << 4, /* queueing/merging */
16 BLK_TC_REQUEUE = 1 << 5, /* requeueing */
17 BLK_TC_ISSUE = 1 << 6, /* issue */
18 BLK_TC_COMPLETE = 1 << 7, /* completions */
19 BLK_TC_FS = 1 << 8, /* fs requests */
20 BLK_TC_PC = 1 << 9, /* pc requests */
21 BLK_TC_NOTIFY = 1 << 10, /* special message */
22 BLK_TC_AHEAD = 1 << 11, /* readahead */
23 BLK_TC_META = 1 << 12, /* metadata */
24 BLK_TC_DISCARD = 1 << 13, /* discard requests */
25 BLK_TC_DRV_DATA = 1 << 14, /* binary per-driver data */
26 BLK_TC_FUA = 1 << 15, /* fua requests */
27
28 BLK_TC_END = 1 << 15, /* we've run out of bits! */
29};
30
31#define BLK_TC_SHIFT (16)
32#define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT)
33
34/*
35 * Basic trace actions
36 */
37enum blktrace_act {
38 __BLK_TA_QUEUE = 1, /* queued */
39 __BLK_TA_BACKMERGE, /* back merged to existing rq */
40 __BLK_TA_FRONTMERGE, /* front merge to existing rq */
41 __BLK_TA_GETRQ, /* allocated new request */
42 __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */
43 __BLK_TA_REQUEUE, /* request requeued */
44 __BLK_TA_ISSUE, /* sent to driver */
45 __BLK_TA_COMPLETE, /* completed by driver */
46 __BLK_TA_PLUG, /* queue was plugged */
47 __BLK_TA_UNPLUG_IO, /* queue was unplugged by io */
48 __BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */
49 __BLK_TA_INSERT, /* insert request */
50 __BLK_TA_SPLIT, /* bio was split */
51 __BLK_TA_BOUNCE, /* bio was bounced */
52 __BLK_TA_REMAP, /* bio was remapped */
53 __BLK_TA_ABORT, /* request aborted */
54 __BLK_TA_DRV_DATA, /* driver-specific binary data */
55};
56
57/*
58 * Notify events.
59 */
60enum blktrace_notify {
61 __BLK_TN_PROCESS = 0, /* establish pid/name mapping */
62 __BLK_TN_TIMESTAMP, /* include system clock */
63 __BLK_TN_MESSAGE, /* Character string message */
64};
65
66
67/*
68 * Trace actions in full. Additionally, read or write is masked
69 */
70#define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE))
71#define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
72#define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
73#define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE))
74#define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE))
75#define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE))
76#define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE))
77#define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE))
78#define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
79#define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE))
80#define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE))
81#define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE))
82#define BLK_TA_SPLIT (__BLK_TA_SPLIT)
83#define BLK_TA_BOUNCE (__BLK_TA_BOUNCE)
84#define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))
85#define BLK_TA_ABORT (__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE))
86#define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA))
87
88#define BLK_TN_PROCESS (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
89#define BLK_TN_TIMESTAMP (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
90#define BLK_TN_MESSAGE (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY))
91
92#define BLK_IO_TRACE_MAGIC 0x65617400
93#define BLK_IO_TRACE_VERSION 0x07
94
95/*
96 * The trace itself
97 */
98struct blk_io_trace {
99 __u32 magic; /* MAGIC << 8 | version */
100 __u32 sequence; /* event number */
101 __u64 time; /* in microseconds */
102 __u64 sector; /* disk offset */
103 __u32 bytes; /* transfer length */
104 __u32 action; /* what happened */
105 __u32 pid; /* who did it */
106 __u32 device; /* device number */
107 __u32 cpu; /* on what cpu did it happen */
108 __u16 error; /* completion error */
109 __u16 pdu_len; /* length of data after this trace */
110};
111
112/*
113 * The remap event
114 */
115struct blk_io_trace_remap {
116 __be32 device_from;
117 __be32 device_to;
118 __be64 sector_from;
119};
120
121enum {
122 Blktrace_setup = 1,
123 Blktrace_running,
124 Blktrace_stopped,
125};
126
127#define BLKTRACE_BDEV_SIZE 32
128
129/*
130 * User setup structure passed with BLKTRACESTART
131 */
132struct blk_user_trace_setup {
133 char name[BLKTRACE_BDEV_SIZE]; /* output */
134 __u16 act_mask; /* input */
135 __u32 buf_size; /* input */
136 __u32 buf_nr; /* input */
137 __u64 start_lba;
138 __u64 end_lba;
139 __u32 pid;
140};
141
142#endif /* _UAPIBLKTRACE_H */