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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _UAPIBLKTRACE_H3#define _UAPIBLKTRACE_H4 5#include <linux/types.h>6 7/*8 * Trace categories9 */10enum 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 actions37 */38enum 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 */62enum 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 masked72 */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 0x6561740096#define BLK_IO_TRACE_VERSION 0x0797 98/*99 * The trace itself100 */101struct 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 event118 */119struct blk_io_trace_remap {120 __be32 device_from;121 __be32 device_to;122 __be64 sector_from;123};124 125enum {126 Blktrace_setup = 1,127 Blktrace_running,128 Blktrace_stopped,129};130 131#define BLKTRACE_BDEV_SIZE 32132 133/*134 * User setup structure passed with BLKTRACESETUP135 */136struct 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