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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/blktrace_api.h

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  1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2 #ifndef _UAPIBLKTRACE_H
  3 #define _UAPIBLKTRACE_H
  4 
  5 #include <linux/types.h>
  6 
  7 /*
  8  * Trace categories
  9  */
 10 enum blktrace_cat {
 11         BLK_TC_READ     = 1 << 0,       /* reads */
 12         BLK_TC_WRITE    = 1 << 1,       /* writes */
 13         BLK_TC_FLUSH    = 1 << 2,       /* flush */
 14         BLK_TC_SYNC     = 1 << 3,       /* sync IO */
 15         BLK_TC_SYNCIO   = BLK_TC_SYNC,
 16         BLK_TC_QUEUE    = 1 << 4,       /* queueing/merging */
 17         BLK_TC_REQUEUE  = 1 << 5,       /* requeueing */
 18         BLK_TC_ISSUE    = 1 << 6,       /* issue */
 19         BLK_TC_COMPLETE = 1 << 7,       /* completions */
 20         BLK_TC_FS       = 1 << 8,       /* fs requests */
 21         BLK_TC_PC       = 1 << 9,       /* pc requests */
 22         BLK_TC_NOTIFY   = 1 << 10,      /* special message */
 23         BLK_TC_AHEAD    = 1 << 11,      /* readahead */
 24         BLK_TC_META     = 1 << 12,      /* metadata */
 25         BLK_TC_DISCARD  = 1 << 13,      /* discard requests */
 26         BLK_TC_DRV_DATA = 1 << 14,      /* binary per-driver data */
 27         BLK_TC_FUA      = 1 << 15,      /* fua requests */
 28 
 29         BLK_TC_END      = 1 << 15,      /* we've run out of bits! */
 30 };
 31 
 32 #define BLK_TC_SHIFT            (16)
 33 #define BLK_TC_ACT(act)         ((act) << BLK_TC_SHIFT)
 34 
 35 /*
 36  * Basic trace actions
 37  */
 38 enum blktrace_act {
 39         __BLK_TA_QUEUE = 1,             /* queued */
 40         __BLK_TA_BACKMERGE,             /* back merged to existing rq */
 41         __BLK_TA_FRONTMERGE,            /* front merge to existing rq */
 42         __BLK_TA_GETRQ,                 /* allocated new request */
 43         __BLK_TA_SLEEPRQ,               /* sleeping on rq allocation */
 44         __BLK_TA_REQUEUE,               /* request requeued */
 45         __BLK_TA_ISSUE,                 /* sent to driver */
 46         __BLK_TA_COMPLETE,              /* completed by driver */
 47         __BLK_TA_PLUG,                  /* queue was plugged */
 48         __BLK_TA_UNPLUG_IO,             /* queue was unplugged by io */
 49         __BLK_TA_UNPLUG_TIMER,          /* queue was unplugged by timer */
 50         __BLK_TA_INSERT,                /* insert request */
 51         __BLK_TA_SPLIT,                 /* bio was split */
 52         __BLK_TA_BOUNCE,                /* bio was bounced */
 53         __BLK_TA_REMAP,                 /* bio was remapped */
 54         __BLK_TA_ABORT,                 /* request aborted */
 55         __BLK_TA_DRV_DATA,              /* driver-specific binary data */
 56         __BLK_TA_CGROUP = 1 << 8,       /* from a cgroup*/
 57 };
 58 
 59 /*
 60  * Notify events.
 61  */
 62 enum blktrace_notify {
 63         __BLK_TN_PROCESS = 0,           /* establish pid/name mapping */
 64         __BLK_TN_TIMESTAMP,             /* include system clock */
 65         __BLK_TN_MESSAGE,               /* Character string message */
 66         __BLK_TN_CGROUP = __BLK_TA_CGROUP, /* from a cgroup */
 67 };
 68 
 69 
 70 /*
 71  * Trace actions in full. Additionally, read or write is masked
 72  */
 73 #define BLK_TA_QUEUE            (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE))
 74 #define BLK_TA_BACKMERGE        (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
 75 #define BLK_TA_FRONTMERGE       (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
 76 #define BLK_TA_GETRQ            (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE))
 77 #define BLK_TA_SLEEPRQ          (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE))
 78 #define BLK_TA_REQUEUE          (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE))
 79 #define BLK_TA_ISSUE            (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE))
 80 #define BLK_TA_COMPLETE         (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE))
 81 #define BLK_TA_PLUG             (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
 82 #define BLK_TA_UNPLUG_IO        (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE))
 83 #define BLK_TA_UNPLUG_TIMER     (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE))
 84 #define BLK_TA_INSERT           (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE))
 85 #define BLK_TA_SPLIT            (__BLK_TA_SPLIT)
 86 #define BLK_TA_BOUNCE           (__BLK_TA_BOUNCE)
 87 #define BLK_TA_REMAP            (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))
 88 #define BLK_TA_ABORT            (__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE))
 89 #define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA))
 90 
 91 #define BLK_TN_PROCESS          (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
 92 #define BLK_TN_TIMESTAMP        (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
 93 #define BLK_TN_MESSAGE          (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY))
 94 
 95 #define BLK_IO_TRACE_MAGIC      0x65617400
 96 #define BLK_IO_TRACE_VERSION    0x07
 97 
 98 /*
 99  * The trace itself
100  */
101 struct blk_io_trace {
102         __u32 magic;            /* MAGIC << 8 | version */
103         __u32 sequence;         /* event number */
104         __u64 time;             /* in nanoseconds */
105         __u64 sector;           /* disk offset */
106         __u32 bytes;            /* transfer length */
107         __u32 action;           /* what happened */
108         __u32 pid;              /* who did it */
109         __u32 device;           /* device number */
110         __u32 cpu;              /* on what cpu did it happen */
111         __u16 error;            /* completion error */
112         __u16 pdu_len;          /* length of data after this trace */
113         /* cgroup id will be stored here if exists */
114 };
115 
116 /*
117  * The remap event
118  */
119 struct blk_io_trace_remap {
120         __be32 device_from;
121         __be32 device_to;
122         __be64 sector_from;
123 };
124 
125 enum {
126         Blktrace_setup = 1,
127         Blktrace_running,
128         Blktrace_stopped,
129 };
130 
131 #define BLKTRACE_BDEV_SIZE      32
132 
133 /*
134  * User setup structure passed with BLKTRACESETUP
135  */
136 struct blk_user_trace_setup {
137         char name[BLKTRACE_BDEV_SIZE];  /* output */
138         __u16 act_mask;                 /* input */
139         __u32 buf_size;                 /* input */
140         __u32 buf_nr;                   /* input */
141         __u64 start_lba;
142         __u64 end_lba;
143         __u32 pid;
144 };
145 
146 #endif /* _UAPIBLKTRACE_H */
147 

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