[mirror_ubuntu-zesty-kernel.git] / include / linux / blktrace_api.h

#ifndef BLKTRACE_H
#define BLKTRACE_H

#include <linux/types.h>
#ifdef __KERNEL__
#include <linux/blkdev.h>
#include <linux/relay.h>
#include <linux/compat.h>
#endif

/*
 * 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;
};

#ifdef __KERNEL__
#if defined(CONFIG_BLK_DEV_IO_TRACE)

#include <linux/sysfs.h>

struct blk_trace {
	int trace_state;
	struct rchan *rchan;
	unsigned long __percpu *sequence;
	unsigned char __percpu *msg_data;
	u16 act_mask;
	u64 start_lba;
	u64 end_lba;
	u32 pid;
	u32 dev;
	struct dentry *dir;
	struct dentry *dropped_file;
	struct dentry *msg_file;
	atomic_t dropped;
};

extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
extern void blk_trace_shutdown(struct request_queue *);
extern int do_blk_trace_setup(struct request_queue *q, char *name,
			      dev_t dev, struct block_device *bdev,
			      struct blk_user_trace_setup *buts);
extern __printf(2, 3)
void __trace_note_message(struct blk_trace *, const char *fmt, ...);

/**
 * blk_add_trace_msg - Add a (simple) message to the blktrace stream
 * @q:		queue the io is for
 * @fmt:	format to print message in
 * args...	Variable argument list for format
 *
 * Description:
 *     Records a (simple) message onto the blktrace stream.
 *
 *     NOTE: BLK_TN_MAX_MSG characters are output at most.
 *     NOTE: Can not use 'static inline' due to presence of var args...
 *
 **/
#define blk_add_trace_msg(q, fmt, ...)					\
	do {								\
		struct blk_trace *bt = (q)->blk_trace;			\
		if (unlikely(bt))					\
			__trace_note_message(bt, fmt, ##__VA_ARGS__);	\
	} while (0)
#define BLK_TN_MAX_MSG		128

extern void blk_add_driver_data(struct request_queue *q, struct request *rq,
				void *data, size_t len);
extern int blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
			   struct block_device *bdev,
			   char __user *arg);
extern int blk_trace_startstop(struct request_queue *q, int start);
extern int blk_trace_remove(struct request_queue *q);
extern void blk_trace_remove_sysfs(struct device *dev);
extern int blk_trace_init_sysfs(struct device *dev);

extern struct attribute_group blk_trace_attr_group;

#else /* !CONFIG_BLK_DEV_IO_TRACE */
# define blk_trace_ioctl(bdev, cmd, arg)		(-ENOTTY)
# define blk_trace_shutdown(q)				do { } while (0)
# define do_blk_trace_setup(q, name, dev, bdev, buts)	(-ENOTTY)
# define blk_add_driver_data(q, rq, data, len)		do {} while (0)
# define blk_trace_setup(q, name, dev, bdev, arg)	(-ENOTTY)
# define blk_trace_startstop(q, start)			(-ENOTTY)
# define blk_trace_remove(q)				(-ENOTTY)
# define blk_add_trace_msg(q, fmt, ...)			do { } while (0)
# define blk_trace_remove_sysfs(dev)			do { } while (0)
static inline int blk_trace_init_sysfs(struct device *dev)
{
	return 0;
}

#endif /* CONFIG_BLK_DEV_IO_TRACE */

#ifdef CONFIG_COMPAT

struct compat_blk_user_trace_setup {
	char name[32];
	u16 act_mask;
	u32 buf_size;
	u32 buf_nr;
	compat_u64 start_lba;
	compat_u64 end_lba;
	u32 pid;
};
#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)

#endif

#if defined(CONFIG_EVENT_TRACING) && defined(CONFIG_BLOCK)

static inline int blk_cmd_buf_len(struct request *rq)
{
	return (rq->cmd_type == REQ_TYPE_BLOCK_PC) ? rq->cmd_len * 3 : 1;
}

extern void blk_dump_cmd(char *buf, struct request *rq);
extern void blk_fill_rwbs(char *rwbs, u32 rw, int bytes);

#endif /* CONFIG_EVENT_TRACING && CONFIG_BLOCK */

#endif /* __KERNEL__ */
#endif
Commit	Line	Data
2056a782 JA	1	#ifndef BLKTRACE_H
	2	#define BLKTRACE_H
	3
4502b80e	4	#include <linux/types.h>
c0ddffa8	5	#ifdef __KERNEL__
2056a782 JA	6	#include <linux/blkdev.h>
2056a782 JA	7	#include <linux/relay.h>
62c2a7d9	8	#include <linux/compat.h>
c0ddffa8	9	#endif
2056a782 JA	10
	11	/*
	12	* Trace categories
	13	*/
	14	enum blktrace_cat {
	15	BLK_TC_READ = 1 << 0, /* reads */
	16	BLK_TC_WRITE = 1 << 1, /* writes */
c09c47ca	17	BLK_TC_FLUSH = 1 << 2, /* flush */
fc0a75ce	18	BLK_TC_SYNC = 1 << 3, /* sync IO */
93dbb393	19	BLK_TC_SYNCIO = BLK_TC_SYNC,
2056a782 JA	20	BLK_TC_QUEUE = 1 << 4, /* queueing/merging */
	21	BLK_TC_REQUEUE = 1 << 5, /* requeueing */
	22	BLK_TC_ISSUE = 1 << 6, /* issue */
	23	BLK_TC_COMPLETE = 1 << 7, /* completions */
	24	BLK_TC_FS = 1 << 8, /* fs requests */
	25	BLK_TC_PC = 1 << 9, /* pc requests */
	26	BLK_TC_NOTIFY = 1 << 10, /* special message */
40359ccb	27	BLK_TC_AHEAD = 1 << 11, /* readahead */
7457e6e2	28	BLK_TC_META = 1 << 12, /* metadata */
27b29e86	29	BLK_TC_DISCARD = 1 << 13, /* discard requests */
756f8243	30	BLK_TC_DRV_DATA = 1 << 14, /* binary per-driver data */
c09c47ca	31	BLK_TC_FUA = 1 << 15, /* fua requests */
2056a782	32
c09c47ca	33	BLK_TC_END = 1 << 15, /* we've run out of bits! */
2056a782 JA	34	};
	35
	36	#define BLK_TC_SHIFT (16)
	37	#define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT)
	38
	39	/*
	40	* Basic trace actions
	41	*/
	42	enum blktrace_act {
	43	__BLK_TA_QUEUE = 1, /* queued */
	44	__BLK_TA_BACKMERGE, /* back merged to existing rq */
	45	__BLK_TA_FRONTMERGE, /* front merge to existing rq */
	46	__BLK_TA_GETRQ, /* allocated new request */
	47	__BLK_TA_SLEEPRQ, /* sleeping on rq allocation */
	48	__BLK_TA_REQUEUE, /* request requeued */
	49	__BLK_TA_ISSUE, /* sent to driver */
	50	__BLK_TA_COMPLETE, /* completed by driver */
	51	__BLK_TA_PLUG, /* queue was plugged */
	52	__BLK_TA_UNPLUG_IO, /* queue was unplugged by io */
	53	__BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */
	54	__BLK_TA_INSERT, /* insert request */
	55	__BLK_TA_SPLIT, /* bio was split */
	56	__BLK_TA_BOUNCE, /* bio was bounced */
	57	__BLK_TA_REMAP, /* bio was remapped */
11914a53	58	__BLK_TA_ABORT, /* request aborted */
756f8243	59	__BLK_TA_DRV_DATA, /* driver-specific binary data */
2056a782 JA	60	};
2056a782 JA	61
be1c6341 OK	62	/*
	63	* Notify events.
	64	*/
	65	enum blktrace_notify {
	66	__BLK_TN_PROCESS = 0, /* establish pid/name mapping */
	67	__BLK_TN_TIMESTAMP, /* include system clock */
9d5f09a4	68	__BLK_TN_MESSAGE, /* Character string message */
be1c6341 OK	69	};
	70
	71
2056a782 JA	72	/*
	73	* Trace actions in full. Additionally, read or write is masked
	74	*/
	75	#define BLK_TA_QUEUE (__BLK_TA_QUEUE \| BLK_TC_ACT(BLK_TC_QUEUE))
	76	#define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE \| BLK_TC_ACT(BLK_TC_QUEUE))
	77	#define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE \| BLK_TC_ACT(BLK_TC_QUEUE))
	78	#define BLK_TA_GETRQ (__BLK_TA_GETRQ \| BLK_TC_ACT(BLK_TC_QUEUE))
	79	#define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ \| BLK_TC_ACT(BLK_TC_QUEUE))
	80	#define BLK_TA_REQUEUE (__BLK_TA_REQUEUE \| BLK_TC_ACT(BLK_TC_REQUEUE))
	81	#define BLK_TA_ISSUE (__BLK_TA_ISSUE \| BLK_TC_ACT(BLK_TC_ISSUE))
	82	#define BLK_TA_COMPLETE (__BLK_TA_COMPLETE\| BLK_TC_ACT(BLK_TC_COMPLETE))
	83	#define BLK_TA_PLUG (__BLK_TA_PLUG \| BLK_TC_ACT(BLK_TC_QUEUE))
	84	#define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO \| BLK_TC_ACT(BLK_TC_QUEUE))
	85	#define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER \| BLK_TC_ACT(BLK_TC_QUEUE))
	86	#define BLK_TA_INSERT (__BLK_TA_INSERT \| BLK_TC_ACT(BLK_TC_QUEUE))
	87	#define BLK_TA_SPLIT (__BLK_TA_SPLIT)
	88	#define BLK_TA_BOUNCE (__BLK_TA_BOUNCE)
	89	#define BLK_TA_REMAP (__BLK_TA_REMAP \| BLK_TC_ACT(BLK_TC_QUEUE))
11914a53	90	#define BLK_TA_ABORT (__BLK_TA_ABORT \| BLK_TC_ACT(BLK_TC_QUEUE))
756f8243	91	#define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA \| BLK_TC_ACT(BLK_TC_DRV_DATA))
2056a782	92
be1c6341 OK	93	#define BLK_TN_PROCESS (__BLK_TN_PROCESS \| BLK_TC_ACT(BLK_TC_NOTIFY))
be1c6341 OK	94	#define BLK_TN_TIMESTAMP (__BLK_TN_TIMESTAMP \| BLK_TC_ACT(BLK_TC_NOTIFY))
9d5f09a4	95	#define BLK_TN_MESSAGE (__BLK_TN_MESSAGE \| BLK_TC_ACT(BLK_TC_NOTIFY))
be1c6341	96
2056a782 JA	97	#define BLK_IO_TRACE_MAGIC 0x65617400
	98	#define BLK_IO_TRACE_VERSION 0x07
	99
	100	/*
	101	* The trace itself
	102	*/
	103	struct blk_io_trace {
c0ddffa8 SS	104	__u32 magic; /* MAGIC << 8 \| version */
	105	__u32 sequence; /* event number */
	106	__u64 time; /* in microseconds */
	107	__u64 sector; /* disk offset */
	108	__u32 bytes; /* transfer length */
	109	__u32 action; /* what happened */
	110	__u32 pid; /* who did it */
	111	__u32 device; /* device number */
	112	__u32 cpu; /* on what cpu did it happen */
	113	__u16 error; /* completion error */
	114	__u16 pdu_len; /* length of data after this trace */
2056a782 JA	115	};
	116
	117	/*
	118	* The remap event
	119	*/
	120	struct blk_io_trace_remap {
c7149d6b	121	__be32 device_from;
a42aaa3b AB	122	__be32 device_to;
a42aaa3b AB	123	__be64 sector_from;
2056a782 JA	124	};
	125
	126	enum {
	127	Blktrace_setup = 1,
	128	Blktrace_running,
	129	Blktrace_stopped,
	130	};
	131
0497b345 JA	132	#define BLKTRACE_BDEV_SIZE 32
0497b345 JA	133
c0ddffa8 SS	134	/*
	135	* User setup structure passed with BLKTRACESTART
	136	*/
	137	struct blk_user_trace_setup {
0497b345	138	char name[BLKTRACE_BDEV_SIZE]; /* output */
c0ddffa8 SS	139	__u16 act_mask; /* input */
	140	__u32 buf_size; /* input */
	141	__u32 buf_nr; /* input */
	142	__u64 start_lba;
	143	__u64 end_lba;
	144	__u32 pid;
	145	};
	146
	147	#ifdef __KERNEL__
	148	#if defined(CONFIG_BLK_DEV_IO_TRACE)
157f9c00 ACM	149
	150	#include <linux/sysfs.h>
	151
2056a782 JA	152	struct blk_trace {
	153	int trace_state;
	154	struct rchan *rchan;
43cf38eb TH	155	unsigned long __percpu *sequence;
43cf38eb TH	156	unsigned char __percpu *msg_data;
2056a782 JA	157	u16 act_mask;
	158	u64 start_lba;
	159	u64 end_lba;
	160	u32 pid;
	161	u32 dev;
	162	struct dentry *dir;
	163	struct dentry *dropped_file;
02c62304	164	struct dentry *msg_file;
2056a782 JA	165	atomic_t dropped;
	166	};
	167
2056a782	168	extern int blk_trace_ioctl(struct block_device , unsigned, char __user );
165125e1	169	extern void blk_trace_shutdown(struct request_queue *);
d0deef5b SD	170	extern int do_blk_trace_setup(struct request_queue q, char name,
	171	dev_t dev, struct block_device *bdev,
	172	struct blk_user_trace_setup *buts);
b9075fa9	173	extern __printf(2, 3)
08e8138a	174	void __trace_note_message(struct blk_trace , const char fmt, ...);
171044d4	175
9d5f09a4 AB	176	/**
	177	* blk_add_trace_msg - Add a (simple) message to the blktrace stream
	178	* @q: queue the io is for
	179	* @fmt: format to print message in
	180	* args... Variable argument list for format
	181	*
	182	* Description:
	183	* Records a (simple) message onto the blktrace stream.
	184	*
	185	* NOTE: BLK_TN_MAX_MSG characters are output at most.
	186	* NOTE: Can not use 'static inline' due to presence of var args...
	187	*
	188	**/
	189	#define blk_add_trace_msg(q, fmt, ...) \
	190	do { \
	191	struct blk_trace *bt = (q)->blk_trace; \
	192	if (unlikely(bt)) \
	193	__trace_note_message(bt, fmt, ##__VA_ARGS__); \
	194	} while (0)
64565911	195	#define BLK_TN_MAX_MSG 128
2056a782	196
5f3ea37c ACM	197	extern void blk_add_driver_data(struct request_queue q, struct request rq,
5f3ea37c ACM	198	void *data, size_t len);
7da975a2	199	extern int blk_trace_setup(struct request_queue q, char name, dev_t dev,
d0deef5b	200	struct block_device *bdev,
6da127ad	201	char __user *arg);
7da975a2 MP	202	extern int blk_trace_startstop(struct request_queue *q, int start);
7da975a2 MP	203	extern int blk_trace_remove(struct request_queue *q);
48c0d4d4	204	extern void blk_trace_remove_sysfs(struct device *dev);
1d54ad6d	205	extern int blk_trace_init_sysfs(struct device *dev);
6da127ad	206
157f9c00 ACM	207	extern struct attribute_group blk_trace_attr_group;
157f9c00 ACM	208
2056a782	209	#else /* !CONFIG_BLK_DEV_IO_TRACE */
d0deef5b SD	210	# define blk_trace_ioctl(bdev, cmd, arg) (-ENOTTY)
	211	# define blk_trace_shutdown(q) do { } while (0)
	212	# define do_blk_trace_setup(q, name, dev, bdev, buts) (-ENOTTY)
	213	# define blk_add_driver_data(q, rq, data, len) do {} while (0)
	214	# define blk_trace_setup(q, name, dev, bdev, arg) (-ENOTTY)
	215	# define blk_trace_startstop(q, start) (-ENOTTY)
	216	# define blk_trace_remove(q) (-ENOTTY)
	217	# define blk_add_trace_msg(q, fmt, ...) do { } while (0)
b0da3f0d	218	# define blk_trace_remove_sysfs(dev) do { } while (0)
1d54ad6d LZ	219	static inline int blk_trace_init_sysfs(struct device *dev)
	220	{
	221	return 0;
	222	}
	223
2056a782	224	#endif /* CONFIG_BLK_DEV_IO_TRACE */
d0deef5b	225
2669b19f SR	226	#ifdef CONFIG_COMPAT
	227
	228	struct compat_blk_user_trace_setup {
	229	char name[32];
	230	u16 act_mask;
	231	u32 buf_size;
	232	u32 buf_nr;
	233	compat_u64 start_lba;
	234	compat_u64 end_lba;
	235	u32 pid;
	236	};
	237	#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)
	238
	239	#endif
	240
f1db457c	241	#if defined(CONFIG_EVENT_TRACING) && defined(CONFIG_BLOCK)
55782138 LZ	242
	243	static inline int blk_cmd_buf_len(struct request *rq)
	244	{
33659ebb	245	return (rq->cmd_type == REQ_TYPE_BLOCK_PC) ? rq->cmd_len * 3 : 1;
55782138 LZ	246	}
	247
	248	extern void blk_dump_cmd(char buf, struct request rq);
	249	extern void blk_fill_rwbs(char *rwbs, u32 rw, int bytes);
55782138	250
f1db457c	251	#endif /* CONFIG_EVENT_TRACING && CONFIG_BLOCK */
55782138	252
171044d4	253	#endif /* __KERNEL__ */
2056a782	254	#endif