[linux-2.6-block.git] / fs / f2fs / trace.c

/*
 * f2fs IO tracer
 *
 * Copyright (c) 2014 Motorola Mobility
 * Copyright (c) 2014 Jaegeuk Kim <jaegeuk@kernel.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/sched.h>

#include "f2fs.h"
#include "trace.h"

RADIX_TREE(pids, GFP_NOIO);
struct last_io_info last_io;

static inline void __print_last_io(void)
{
	if (!last_io.len)
		return;

	trace_printk("%3x:%3x %4x %-16s %2x %5x %12x %4x\n",
			last_io.major, last_io.minor,
			last_io.pid, "----------------",
			last_io.type,
			last_io.fio.rw, last_io.fio.blk_addr,
			last_io.len);
	memset(&last_io, 0, sizeof(last_io));
}

static int __file_type(struct inode *inode, pid_t pid)
{
	if (f2fs_is_atomic_file(inode))
		return __ATOMIC_FILE;
	else if (f2fs_is_volatile_file(inode))
		return __VOLATILE_FILE;
	else if (S_ISDIR(inode->i_mode))
		return __DIR_FILE;
	else if (inode->i_ino == F2FS_NODE_INO(F2FS_I_SB(inode)))
		return __NODE_FILE;
	else if (inode->i_ino == F2FS_META_INO(F2FS_I_SB(inode)))
		return __META_FILE;
	else if (pid)
		return __NORMAL_FILE;
	else
		return __MISC_FILE;
}

void f2fs_trace_pid(struct page *page)
{
	struct inode *inode = page->mapping->host;
	pid_t pid = task_pid_nr(current);
	void *p;

	page->private = pid;

	p = radix_tree_lookup(&pids, pid);
	if (p == current)
		return;
	if (p)
		radix_tree_delete(&pids, pid);

	f2fs_radix_tree_insert(&pids, pid, current);

	trace_printk("%3x:%3x %4x %-16s\n",
			MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev),
			pid, current->comm);

}

void f2fs_trace_ios(struct page *page, struct f2fs_io_info *fio, int flush)
{
	struct inode *inode;
	pid_t pid;
	int major, minor;

	if (flush) {
		__print_last_io();
		return;
	}

	inode = page->mapping->host;
	pid = page_private(page);

	major = MAJOR(inode->i_sb->s_dev);
	minor = MINOR(inode->i_sb->s_dev);

	if (last_io.major == major && last_io.minor == minor &&
			last_io.pid == pid &&
			last_io.type == __file_type(inode, pid) &&
			last_io.fio.rw == fio->rw &&
			last_io.fio.blk_addr + last_io.len == fio->blk_addr) {
		last_io.len++;
		return;
	}

	__print_last_io();

	last_io.major = major;
	last_io.minor = minor;
	last_io.pid = pid;
	last_io.type = __file_type(inode, pid);
	last_io.fio = *fio;
	last_io.len = 1;
	return;
}
Commit	Line	Data
63f92ddc JK	1	/*
	2	* f2fs IO tracer
	3	*
	4	* Copyright (c) 2014 Motorola Mobility
	5	* Copyright (c) 2014 Jaegeuk Kim <jaegeuk@kernel.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#include <linux/fs.h>
	12	#include <linux/f2fs_fs.h>
	13	#include <linux/sched.h>
	14
	15	#include "f2fs.h"
	16	#include "trace.h"
	17
0e689d03 JK	18	RADIX_TREE(pids, GFP_NOIO);
	19	struct last_io_info last_io;
	20
	21	static inline void __print_last_io(void)
	22	{
	23	if (!last_io.len)
	24	return;
	25
	26	trace_printk("%3x:%3x %4x %-16s %2x %5x %12x %4x\n",
	27	last_io.major, last_io.minor,
	28	last_io.pid, "----------------",
	29	last_io.type,
	30	last_io.fio.rw, last_io.fio.blk_addr,
	31	last_io.len);
	32	memset(&last_io, 0, sizeof(last_io));
	33	}
	34
	35	static int __file_type(struct inode *inode, pid_t pid)
	36	{
	37	if (f2fs_is_atomic_file(inode))
	38	return __ATOMIC_FILE;
	39	else if (f2fs_is_volatile_file(inode))
	40	return __VOLATILE_FILE;
	41	else if (S_ISDIR(inode->i_mode))
	42	return __DIR_FILE;
	43	else if (inode->i_ino == F2FS_NODE_INO(F2FS_I_SB(inode)))
	44	return __NODE_FILE;
	45	else if (inode->i_ino == F2FS_META_INO(F2FS_I_SB(inode)))
	46	return __META_FILE;
	47	else if (pid)
	48	return __NORMAL_FILE;
	49	else
	50	return __MISC_FILE;
	51	}
	52
63f92ddc JK	53	void f2fs_trace_pid(struct page *page)
63f92ddc JK	54	{
0e689d03 JK	55	struct inode *inode = page->mapping->host;
	56	pid_t pid = task_pid_nr(current);
	57	void *p;
	58
	59	page->private = pid;
	60
	61	p = radix_tree_lookup(&pids, pid);
	62	if (p == current)
	63	return;
	64	if (p)
	65	radix_tree_delete(&pids, pid);
	66
	67	f2fs_radix_tree_insert(&pids, pid, current);
	68
	69	trace_printk("%3x:%3x %4x %-16s\n",
	70	MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev),
	71	pid, current->comm);
	72
63f92ddc JK	73	}
	74
	75	void f2fs_trace_ios(struct page page, struct f2fs_io_info fio, int flush)
	76	{
0e689d03 JK	77	struct inode *inode;
	78	pid_t pid;
	79	int major, minor;
	80
	81	if (flush) {
	82	__print_last_io();
	83	return;
	84	}
	85
	86	inode = page->mapping->host;
	87	pid = page_private(page);
	88
	89	major = MAJOR(inode->i_sb->s_dev);
	90	minor = MINOR(inode->i_sb->s_dev);
	91
	92	if (last_io.major == major && last_io.minor == minor &&
	93	last_io.pid == pid &&
	94	last_io.type == __file_type(inode, pid) &&
	95	last_io.fio.rw == fio->rw &&
	96	last_io.fio.blk_addr + last_io.len == fio->blk_addr) {
	97	last_io.len++;
	98	return;
	99	}
	100
	101	__print_last_io();
	102
	103	last_io.major = major;
	104	last_io.minor = minor;
	105	last_io.pid = pid;
	106	last_io.type = __file_type(inode, pid);
	107	last_io.fio = *fio;
	108	last_io.len = 1;
	109	return;
63f92ddc	110	}