masters-pmf/blk/blktrace_api.h

   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 */
  12         BLK_TC_BARRIER  = 1 << 2,       /* barrier */
  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
  24         BLK_TC_END      = 1 << 15,      /* only 16-bits, reminder */
  25 };
  26
  27 #define BLK_TC_SHIFT            (16)
  28 #define BLK_TC_ACT(act)         ((act) << BLK_TC_SHIFT)
  29
  30 /*
  31  * Basic trace actions
  32  */
  33 //enum blktrace_act {
  34 //      __BLK_TA_QUEUE = 1,             /* queued */
  35 //      __BLK_TA_BACKMERGE,             /* back merged to existing rq */
  36 //      __BLK_TA_FRONTMERGE,            /* front merge to existing rq */
  37 //      __BLK_TA_GETRQ,                 /* allocated new request */
  38 //      __BLK_TA_SLEEPRQ,               /* sleeping on rq allocation */
  39 //      __BLK_TA_REQUEUE,               /* request requeued */
  40 //      __BLK_TA_ISSUE,                 /* sent to driver */
  41 //      __BLK_TA_COMPLETE,              /* completed by driver */
  42 //      __BLK_TA_PLUG,                  /* queue was plugged */
  43 //      __BLK_TA_UNPLUG_IO,             /* queue was unplugged by io */
  44 //      __BLK_TA_UNPLUG_TIMER,          /* queue was unplugged by timer */
  45 //      __BLK_TA_INSERT,                /* insert request */
  46 //      __BLK_TA_SPLIT,                 /* bio was split */
  47 //      __BLK_TA_BOUNCE,                /* bio was bounced */
  48 //      __BLK_TA_REMAP,                 /* bio was remapped */
  49 //};
  50
  51 /*
  52  * Notify events.
  53  */
  54 //enum blktrace_notify {
  55 //      __BLK_TN_PROCESS = 0,           /* establish pid/name mapping */
  56 //      __BLK_TN_TIMESTAMP,             /* include system clock */
  57 //};
  58
  59
  60 /*
  61  * Trace actions in full. Additionally, read or write is masked
  62  */
  63 #define BLK_TA_QUEUE            (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE))
  64 #define BLK_TA_BACKMERGE        (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
  65 #define BLK_TA_FRONTMERGE       (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
  66 #define BLK_TA_GETRQ            (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE))
  67 #define BLK_TA_SLEEPRQ          (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE))
  68 #define BLK_TA_REQUEUE          (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE))
  69 #define BLK_TA_ISSUE            (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE))
  70 #define BLK_TA_COMPLETE         (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE))
  71 #define BLK_TA_PLUG             (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
  72 #define BLK_TA_UNPLUG_IO        (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE))
  73 #define BLK_TA_UNPLUG_TIMER     (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE))
  74 #define BLK_TA_INSERT           (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE))
  75 #define BLK_TA_SPLIT            (__BLK_TA_SPLIT)
  76 #define BLK_TA_BOUNCE           (__BLK_TA_BOUNCE)
  77 #define BLK_TA_REMAP            (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))
  78
  79 #define BLK_TN_PROCESS          (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
  80 #define BLK_TN_TIMESTAMP        (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
  81
  82 #define BLK_IO_TRACE_MAGIC      0x65617400
  83 #define BLK_IO_TRACE_VERSION    0x07
  84
  85 /*
  86  * The trace itself
  87  */
  88 //struct blk_io_trace {
  89 //      u32 magic;              /* MAGIC << 8 | version */
  90 //      u32 sequence;           /* event number */
  91 //      u64 time;               /* in microseconds */
  92 //      u64 sector;             /* disk offset */
  93 //      u32 bytes;              /* transfer length */
  94 //      u32 action;             /* what happened */
  95 //      u32 pid;                /* who did it */
  96 //      u32 device;             /* device number */
  97 //      u32 cpu;                /* on what cpu did it happen */
  98 //      u16 error;              /* completion error */
  99 //      u16 pdu_len;            /* length of data after this trace */
 100 //};
 101
 102 /*
 103  * The remap event
 104  */
 105 //struct blk_io_trace_remap {
 106 //      __be32 device;
 107 //      __be32 device_from;
 108 //      __be64 sector;
 109 //};
 110
 111 enum {
 112         Blktrace_setup = 1,
 113         Blktrace_running,
 114         Blktrace_stopped,
 115 };
 116
 117 struct blk_trace {
 118         int trace_state;
 119 //      struct rchan *rchan;
 120 //      unsigned long *sequence;
 121 //      u16 act_mask;
 122 //      u64 start_lba;
 123 //      u64 end_lba;
 124 //      u32 pid;
 125         __u32 dev;
 126 //      struct dentry *dir;
 127 //      struct dentry *dropped_file;
 128 //      atomic_t dropped;
 129 };
 130
 131 /*
 132  * User setup structure passed with BLKSTARTTRACE
 133  */
 134 struct blk_user_trace_setup {
 135         char name[32];                  /* output */
 136 //      __u16 act_mask;                 /* input */
 137 //      __u32 buf_size;                 /* input */
 138 //      __u32 buf_nr;                   /* input */
 139 //      __u64 start_lba;
 140 //      __u64 end_lba;
 141 //      __u32 pid;
 142 };
 143
 144 #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
 145 #define BLKTRACESTART _IO(0x12,116)
 146 #define BLKTRACESTOP _IO(0x12,117)
 147 #define BLKTRACETEARDOWN _IO(0x12,118)
 148
 149 #endif