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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 */ | |
34432093 | 12 | BLK_TC_FLUSH = 1 << 2, /* flush */ |
f86990ed | 13 | BLK_TC_SYNC = 1 << 3, /* sync */ |
6fe4709e JA |
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 */ |
f86990ed | 21 | BLK_TC_AHEAD = 1 << 11, /* readahead */ |
711e4d25 | 22 | BLK_TC_META = 1 << 12, /* metadata */ |
37081bf5 | 23 | BLK_TC_DISCARD = 1 << 13, /* discard requests */ |
c54b9dd9 | 24 | BLK_TC_DRV_DATA = 1 << 14, /* binary driver data */ |
34432093 | 25 | BLK_TC_FUA = 1 << 15, /* fua requests */ |
6fe4709e | 26 | |
34432093 | 27 | BLK_TC_END = 1 << 15, /* we've run out of bits! */ |
6fe4709e JA |
28 | }; |
29 | ||
30 | #define BLK_TC_SHIFT (16) | |
31 | #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT) | |
32 | ||
33 | /* | |
34 | * Basic trace actions | |
35 | */ | |
36 | enum { | |
37 | __BLK_TA_QUEUE = 1, /* queued */ | |
38 | __BLK_TA_BACKMERGE, /* back merged to existing rq */ | |
39 | __BLK_TA_FRONTMERGE, /* front merge to existing rq */ | |
40 | __BLK_TA_GETRQ, /* allocated new request */ | |
41 | __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */ | |
42 | __BLK_TA_REQUEUE, /* request requeued */ | |
43 | __BLK_TA_ISSUE, /* sent to driver */ | |
44 | __BLK_TA_COMPLETE, /* completed by driver */ | |
88b1a526 | 45 | __BLK_TA_PLUG, /* queue was plugged */ |
3639a11e JA |
46 | __BLK_TA_UNPLUG_IO, /* queue was unplugged by io */ |
47 | __BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */ | |
b6076a9b | 48 | __BLK_TA_INSERT, /* insert request */ |
93f1c611 JA |
49 | __BLK_TA_SPLIT, /* bio was split */ |
50 | __BLK_TA_BOUNCE, /* bio was bounced */ | |
a8f30e64 | 51 | __BLK_TA_REMAP, /* bio was remapped */ |
b3ee499d | 52 | __BLK_TA_ABORT, /* request aborted */ |
c54b9dd9 | 53 | __BLK_TA_DRV_DATA, /* binary driver data */ |
7238673f | 54 | __BLK_TA_CGROUP = 1 << 8, |
6fe4709e JA |
55 | }; |
56 | ||
7bd4fd0a OK |
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 */ | |
1a15f6a8 | 63 | __BLK_TN_MESSAGE, /* Character string message */ |
7238673f | 64 | __BLK_TN_CGROUP = __BLK_TA_CGROUP, |
7bd4fd0a OK |
65 | }; |
66 | ||
6fe4709e JA |
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)) | |
88b1a526 | 78 | #define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE)) |
3639a11e JA |
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)) | |
b6076a9b | 81 | #define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE)) |
93f1c611 JA |
82 | #define BLK_TA_SPLIT (__BLK_TA_SPLIT) |
83 | #define BLK_TA_BOUNCE (__BLK_TA_BOUNCE) | |
a8f30e64 | 84 | #define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE)) |
b3ee499d | 85 | #define BLK_TA_ABORT (__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE)) |
c54b9dd9 | 86 | #define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA)) |
6fe4709e | 87 | |
7bd4fd0a OK |
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)) | |
1a15f6a8 | 90 | #define BLK_TN_MESSAGE (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY)) |
7bd4fd0a | 91 | |
6fe4709e | 92 | #define BLK_IO_TRACE_MAGIC 0x65617400 |
bfc70ad5 | 93 | #define BLK_IO_TRACE_VERSION 0x07 |
6fe4709e JA |
94 | |
95 | /* | |
96 | * The trace itself | |
97 | */ | |
98 | struct blk_io_trace { | |
99 | __u32 magic; /* MAGIC << 8 | version */ | |
100 | __u32 sequence; /* event number */ | |
f8fd8985 | 101 | __u64 time; /* in nanoseconds */ |
6fe4709e JA |
102 | __u64 sector; /* disk offset */ |
103 | __u32 bytes; /* transfer length */ | |
104 | __u32 action; /* what happened */ | |
105 | __u32 pid; /* who did it */ | |
bfc70ad5 | 106 | __u32 device; /* device identifier (dev_t) */ |
654aaa52 | 107 | __u32 cpu; /* on what cpu did it happen */ |
6fe4709e JA |
108 | __u16 error; /* completion error */ |
109 | __u16 pdu_len; /* length of data after this trace */ | |
110 | }; | |
111 | ||
a8f30e64 JA |
112 | /* |
113 | * The remap event | |
114 | */ | |
115 | struct blk_io_trace_remap { | |
97d13fb0 | 116 | __u32 device_from; |
580f7440 AB |
117 | __u32 device_to; |
118 | __u64 sector_from; | |
a8f30e64 JA |
119 | }; |
120 | ||
7238673f JK |
121 | /* |
122 | * Payload with originating cgroup info | |
123 | */ | |
124 | struct blk_io_cgroup_payload { | |
125 | __u32 ino; | |
126 | __u32 gen; | |
127 | }; | |
128 | ||
6fe4709e JA |
129 | /* |
130 | * User setup structure passed with BLKSTARTTRACE | |
131 | */ | |
132 | struct blk_user_trace_setup { | |
133 | char name[32]; /* output */ | |
134 | __u16 act_mask; /* input */ | |
135 | __u32 buf_size; /* input */ | |
136 | __u32 buf_nr; /* input */ | |
6c8d81e4 JA |
137 | __u64 start_lba; |
138 | __u64 end_lba; | |
139 | __u32 pid; | |
6fe4709e JA |
140 | }; |
141 | ||
ed71a31e JA |
142 | #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) |
143 | #define BLKTRACESTART _IO(0x12,116) | |
144 | #define BLKTRACESTOP _IO(0x12,117) | |
145 | #define BLKTRACETEARDOWN _IO(0x12,118) | |
6fe4709e JA |
146 | |
147 | #endif |