cregit-Linux how code gets into the kernel

Release 4.12 include/linux/blktrace_api.h

Directory: include/linux
#ifndef BLKTRACE_H

#define BLKTRACE_H

#include <linux/blkdev.h>
#include <linux/relay.h>
#include <linux/compat.h>
#include <uapi/linux/blktrace_api.h>
#include <linux/list.h>


#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;
struct list_head running_list;
atomic_t dropped;

extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
extern void blk_trace_shutdown(struct request_queue *);
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

static inline bool blk_trace_note_message_enabled(struct request_queue *q) { struct blk_trace *bt = q->blk_trace; if (likely(!bt)) return false; return bt->act_mask & BLK_TC_NOTIFY; }


Shaohua Li39100.00%1100.00%

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 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) # define blk_trace_note_message_enabled(q) (false)
static inline int blk_trace_init_sysfs(struct device *dev) { return 0; }


Li Zefan15100.00%1100.00%

#endif /* CONFIG_BLK_DEV_IO_TRACE */ #ifdef CONFIG_COMPAT struct compat_blk_user_trace_setup { char name[BLKTRACE_BDEV_SIZE]; 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 extern void blk_fill_rwbs(char *rwbs, unsigned int op, int bytes);
static inline sector_t blk_rq_trace_sector(struct request *rq) { return blk_rq_is_passthrough(rq) ? 0 : blk_rq_pos(rq); }


Li Zefan1560.00%133.33%
Christoph Hellwig1040.00%266.67%

static inline unsigned int blk_rq_trace_nr_sectors(struct request *rq) { return blk_rq_is_passthrough(rq) ? 0 : blk_rq_sectors(rq); }


Christoph Hellwig2076.92%266.67%
Li Zefan623.08%133.33%


Overall Contributors

Jens Axboe11222.27%311.11%
Christof Schmitt6813.52%13.70%
Alan D. Brunelle479.34%27.41%
Shaohua Li469.15%13.70%
Li Zefan469.15%27.41%
Christoph Hellwig469.15%27.41%
Stephen Rothwell377.36%13.70%
Stefan Raspl336.56%13.70%
Zdenek Kabelac173.38%13.70%
Arnaldo Carvalho de Melo101.99%27.41%
Shawn Du71.39%13.70%
Jan Kara71.39%13.70%
Martin K. Petersen61.19%13.70%
Sven Schuetz61.19%13.70%
David Howells40.80%13.70%
Joe Perches40.80%27.41%
Jaswinder Singh Rajput20.40%13.70%
Tejun Heo20.40%13.70%
Arnd Bergmann20.40%13.70%
Chen Gang S10.20%13.70%
Directory: include/linux
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.