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607ca46e DH |
1 | #ifndef _UAPIBLKTRACE_H |
2 | #define _UAPIBLKTRACE_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
6 | /* | |
7 | * Trace categories | |
8 | */ | |
9 | enum 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 | */ | |
37 | enum 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 | */ | |
60 | enum 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 | */ | |
98 | struct 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 | */ | |
115 | struct blk_io_trace_remap { | |
116 | __be32 device_from; | |
117 | __be32 device_to; | |
118 | __be64 sector_from; | |
119 | }; | |
120 | ||
121 | enum { | |
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 | */ | |
132 | struct 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 */ |