/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */#ifndef _UAPIBLKTRACE_H#define _UAPIBLKTRACE_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 */	__BLK_TA_CGROUP = 1 << 8,	/* from a cgroup*/}; /* * 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 */	__BLK_TN_CGROUP = __BLK_TA_CGROUP, /* from a cgroup */};  /* * 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 nanoseconds */	__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 */	/* cgroup id will be stored here if exists */}; /* * 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 BLKTRACESETUP */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 /* _UAPIBLKTRACE_H */