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- #ifndef BLKTRACE_H
- #define BLKTRACE_H
- #include <linux/types.h>
- /*
- * Trace categories
- */
- enum blktrace_cat {
- BLK_TC_READ = 1 << 0, /* reads */
- BLK_TC_WRITE = 1 << 1, /* writes */
- BLK_TC_FLUSH = 1 << 2, /* flush */
- BLK_TC_SYNC = 1 << 3, /* sync IO */
- BLK_TC_SYNCIO = BLK_TC_SYNC,
- BLK_TC_QUEUE = 1 << 4, /* queueing/merging */
- BLK_TC_REQUEUE = 1 << 5, /* requeueing */
- BLK_TC_ISSUE = 1 << 6, /* issue */
- BLK_TC_COMPLETE = 1 << 7, /* completions */
- BLK_TC_FS = 1 << 8, /* fs requests */
- BLK_TC_PC = 1 << 9, /* pc requests */
- BLK_TC_NOTIFY = 1 << 10, /* special message */
- BLK_TC_AHEAD = 1 << 11, /* readahead */
- BLK_TC_META = 1 << 12, /* metadata */
- BLK_TC_DISCARD = 1 << 13, /* discard requests */
- BLK_TC_DRV_DATA = 1 << 14, /* binary per-driver data */
- BLK_TC_FUA = 1 << 15, /* fua requests */
- BLK_TC_END = 1 << 15, /* we've run out of bits! */
- };
- #define BLK_TC_SHIFT (16)
- #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT)
- /*
- * Basic trace actions
- */
- enum blktrace_act {
- __BLK_TA_QUEUE = 1, /* queued */
- __BLK_TA_BACKMERGE, /* back merged to existing rq */
- __BLK_TA_FRONTMERGE, /* front merge to existing rq */
- __BLK_TA_GETRQ, /* allocated new request */
- __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */
- __BLK_TA_REQUEUE, /* request requeued */
- __BLK_TA_ISSUE, /* sent to driver */
- __BLK_TA_COMPLETE, /* completed by driver */
- __BLK_TA_PLUG, /* queue was plugged */
- __BLK_TA_UNPLUG_IO, /* queue was unplugged by io */
- __BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */
- __BLK_TA_INSERT, /* insert request */
- __BLK_TA_SPLIT, /* bio was split */
- __BLK_TA_BOUNCE, /* bio was bounced */
- __BLK_TA_REMAP, /* bio was remapped */
- __BLK_TA_ABORT, /* request aborted */
- __BLK_TA_DRV_DATA, /* driver-specific binary data */
- };
- /*
- * Notify events.
- */
- enum blktrace_notify {
- __BLK_TN_PROCESS = 0, /* establish pid/name mapping */
- __BLK_TN_TIMESTAMP, /* include system clock */
- __BLK_TN_MESSAGE, /* Character string message */
- };
- /*
- * Trace actions in full. Additionally, read or write is masked
- */
- #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE))
- #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE))
- #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE))
- #define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_SPLIT (__BLK_TA_SPLIT)
- #define BLK_TA_BOUNCE (__BLK_TA_BOUNCE)
- #define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_ABORT (__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE))
- #define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA))
- #define BLK_TN_PROCESS (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
- #define BLK_TN_TIMESTAMP (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
- #define BLK_TN_MESSAGE (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY))
- #define BLK_IO_TRACE_MAGIC 0x65617400
- #define BLK_IO_TRACE_VERSION 0x07
- /*
- * The trace itself
- */
- struct blk_io_trace {
- __u32 magic; /* MAGIC << 8 | version */
- __u32 sequence; /* event number */
- __u64 time; /* in microseconds */
- __u64 sector; /* disk offset */
- __u32 bytes; /* transfer length */
- __u32 action; /* what happened */
- __u32 pid; /* who did it */
- __u32 device; /* device number */
- __u32 cpu; /* on what cpu did it happen */
- __u16 error; /* completion error */
- __u16 pdu_len; /* length of data after this trace */
- };
- /*
- * The remap event
- */
- struct blk_io_trace_remap {
- __be32 device_from;
- __be32 device_to;
- __be64 sector_from;
- };
- enum {
- Blktrace_setup = 1,
- Blktrace_running,
- Blktrace_stopped,
- };
- #define BLKTRACE_BDEV_SIZE 32
- /*
- * User setup structure passed with BLKTRACESTART
- */
- struct blk_user_trace_setup {
- char name[BLKTRACE_BDEV_SIZE]; /* output */
- __u16 act_mask; /* input */
- __u32 buf_size; /* input */
- __u32 buf_nr; /* input */
- __u64 start_lba;
- __u64 end_lba;
- __u32 pid;
- };
- #endif /* BLKTRACE_H */
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