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include blktrace_api.h in headers_install

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This header file is of interest for user space programming, i.e.
for tools that process blktrace data.

We would like to use it for a tool on-top of blktrace which processes
data provided by blktrace. For this purpose, it would be helpful
if the blktrace API would make it to /usr/include/linux.

The git tree for the blktrace tools comes with its own copy of this header
file. I didn't manage to replace that copy with the file generated
by the patch below yet. A few more cleanups would be needed.
For example, the blktrace ioctl numbers, which are currently defined in
usr/include/fs.h, might need to be moved. Should be feasible, though.

Signed-off-by: Sven Schuetz <sven@linux.vnet.ibm.com>
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Sven Schuetz 2008-09-26 10:58:02 +02:00 committed by Jens Axboe
parent e3ba9ae58a
commit c0ddffa84a
2 changed files with 33 additions and 26 deletions
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1
include/linux/Kbuild
View file

@ -180,6 +180,7 @@ unifdef-y += audit.h
unifdef-y += auto_fs.h
unifdef-y += auxvec.h
unifdef-y += binfmts.h
unifdef-y += blktrace_api.h
unifdef-y += capability.h
unifdef-y += capi.h
unifdef-y += cciss_ioctl.h

58
include/linux/blktrace_api.h
View file

@ -1,8 +1,10 @@
#ifndef BLKTRACE_H
#define BLKTRACE_H
#ifdef __KERNEL__
#include <linux/blkdev.h>
#include <linux/relay.h>
#endif
/*
* Trace categories
@ -92,17 +94,17 @@ enum blktrace_notify {
* 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 */
__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 */
};
/*
@ -120,6 +122,25 @@ enum {
Blktrace_stopped,
};
/*
* User setup structure passed with BLKTRACESTART
*/
struct blk_user_trace_setup {
#ifdef __KERNEL__
char name[BDEVNAME_SIZE]; /* output */
#else
char name[32]; /* output */
#endif
__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)
struct blk_trace {
int trace_state;
struct rchan *rchan;
@ -136,21 +157,6 @@ struct blk_trace {
atomic_t dropped;
};
/*
* User setup structure passed with BLKTRACESTART
*/
struct blk_user_trace_setup {
char name[BDEVNAME_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)
extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
extern void blk_trace_shutdown(struct request_queue *);
extern void __blk_add_trace(struct blk_trace *, sector_t, int, int, u32, int, int, void *);