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 */
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 */
20 BLK_TC_NOTIFY = 1 << 10, /* special message */
21 BLK_TC_AHEAD = 1 << 11, /* readahead */
22 BLK_TC_META = 1 << 12, /* metadata */
23 BLK_TC_DISCARD = 1 << 13, /* discard requests */
24 BLK_TC_DRV_DATA = 1 << 14, /* binary per-driver data */
26 BLK_TC_END = 1 << 15, /* only 16-bits, reminder */
29 #define BLK_TC_SHIFT (16)
30 #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT)
36 __BLK_TA_QUEUE = 1, /* queued */
37 __BLK_TA_BACKMERGE, /* back merged to existing rq */
38 __BLK_TA_FRONTMERGE, /* front merge to existing rq */
39 __BLK_TA_GETRQ, /* allocated new request */
40 __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */
41 __BLK_TA_REQUEUE, /* request requeued */
42 __BLK_TA_ISSUE, /* sent to driver */
43 __BLK_TA_COMPLETE, /* completed by driver */
44 __BLK_TA_PLUG, /* queue was plugged */
45 __BLK_TA_UNPLUG_IO, /* queue was unplugged by io */
46 __BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */
47 __BLK_TA_INSERT, /* insert request */
48 __BLK_TA_SPLIT, /* bio was split */
49 __BLK_TA_BOUNCE, /* bio was bounced */
50 __BLK_TA_REMAP, /* bio was remapped */
51 __BLK_TA_ABORT, /* request aborted */
52 __BLK_TA_DRV_DATA, /* driver-specific binary data */
58 enum blktrace_notify {
59 __BLK_TN_PROCESS = 0, /* establish pid/name mapping */
60 __BLK_TN_TIMESTAMP, /* include system clock */
61 __BLK_TN_MESSAGE, /* Character string message */
65 * Trace actions in full. Additionally, read or write is masked
67 #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE))
68 #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
69 #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
70 #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE))
71 #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE))
72 #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE))
73 #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE))
74 #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE))
75 #define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
76 #define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE))
77 #define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE))
78 #define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE))
79 #define BLK_TA_SPLIT (__BLK_TA_SPLIT)
80 #define BLK_TA_BOUNCE (__BLK_TA_BOUNCE)
81 #define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))
82 #define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA))
84 #define BLK_TN_PROCESS (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
85 #define BLK_TN_TIMESTAMP (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
86 #define BLK_TN_MESSAGE (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY))
88 #define BLK_IO_TRACE_MAGIC 0x65617400
89 #define BLK_IO_TRACE_VERSION 0x07
95 __u32 magic; /* MAGIC << 8 | version */
96 __u32 sequence; /* event number */
97 __u64 time; /* in nanoseconds */
98 __u64 sector; /* disk offset */
99 __u32 bytes; /* transfer length */
100 __u32 action; /* what happened */
101 __u32 pid; /* who did it */
102 __u32 device; /* device identifier (dev_t) */
103 __u32 cpu; /* on what cpu did it happen */
104 __u16 error; /* completion error */
105 __u16 pdu_len; /* length of data after this trace */
111 struct blk_io_trace_remap {
118 * User setup structure passed with BLKSTARTTRACE
120 struct blk_user_trace_setup {
121 char name[32]; /* output */
122 __u16 act_mask; /* input */
123 __u32 buf_size; /* input */
124 __u32 buf_nr; /* input */