4 #include <linux/types.h>
10 BLK_TC_READ
= 1 << 0, /* reads */
11 BLK_TC_WRITE
= 1 << 1, /* writes */
12 BLK_TC_BARRIER
= 1 << 2, /* barrier */
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 */
27 BLK_TC_END
= 1 << 15, /* only 16-bits, reminder */
30 #define BLK_TC_SHIFT (16)
31 #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT)
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 */
45 __BLK_TA_PLUG
, /* queue was plugged */
46 __BLK_TA_UNPLUG_IO
, /* queue was unplugged by io */
47 __BLK_TA_UNPLUG_TIMER
, /* queue was unplugged by timer */
48 __BLK_TA_INSERT
, /* insert request */
49 __BLK_TA_SPLIT
, /* bio was split */
50 __BLK_TA_BOUNCE
, /* bio was bounced */
51 __BLK_TA_REMAP
, /* bio was remapped */
52 __BLK_TA_ABORT
, /* request aborted */
53 __BLK_TA_DRV_DATA
, /* driver-specific binary data */
59 enum blktrace_notify
{
60 __BLK_TN_PROCESS
= 0, /* establish pid/name mapping */
61 __BLK_TN_TIMESTAMP
, /* include system clock */
62 __BLK_TN_MESSAGE
, /* Character string message */
67 * Trace actions in full. Additionally, read or write is masked
69 #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE))
70 #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
71 #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
72 #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE))
73 #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE))
74 #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE))
75 #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE))
76 #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE))
77 #define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
78 #define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE))
79 #define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE))
80 #define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE))
81 #define BLK_TA_SPLIT (__BLK_TA_SPLIT)
82 #define BLK_TA_BOUNCE (__BLK_TA_BOUNCE)
83 #define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))
84 #define BLK_TA_ABORT (__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE))
85 #define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA))
87 #define BLK_TN_PROCESS (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
88 #define BLK_TN_TIMESTAMP (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
89 #define BLK_TN_MESSAGE (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY))
91 #define BLK_IO_TRACE_MAGIC 0x65617400
92 #define BLK_IO_TRACE_VERSION 0x07
98 __u32 magic
; /* MAGIC << 8 | version */
99 __u32 sequence
; /* event number */
100 __u64 time
; /* in microseconds */
101 __u64 sector
; /* disk offset */
102 __u32 bytes
; /* transfer length */
103 __u32 action
; /* what happened */
104 __u32 pid
; /* who did it */
105 __u32 device
; /* device number */
106 __u32 cpu
; /* on what cpu did it happen */
107 __u16 error
; /* completion error */
108 __u16 pdu_len
; /* length of data after this trace */
114 struct blk_io_trace_remap
{
126 #define BLKTRACE_BDEV_SIZE 32
129 * User setup structure passed with BLKTRACESTART
131 struct blk_user_trace_setup
{
132 char name
[BLKTRACE_BDEV_SIZE
]; /* output */
133 __u16 act_mask
; /* input */
134 __u32 buf_size
; /* input */
135 __u32 buf_nr
; /* input */