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Commit 13734785 authored by Yunlong Song's avatar Yunlong Song Committed by Jaegeuk Kim
Browse files

f2fs: add proc entry to show victim_secmap bitmap 



This patch adds a new proc entry to show victim_secmap information in
more detail, which is very helpful to know the get_victim candidate
status clearly, and helpful to debug problems (e.g., some sections can
not gc all of its blocks, since some blocks belong to atomic file,
leaving victim_secmap with section bit setting, in extrem case, this
will lead all bytes of victim_secmap setting with 0xff).

Signed-off-by: default avatarYunlong Song <yunlong.song@huawei.com>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 5cf8d7b9

fs/f2fs/sysfs.c

+26 −0
Original line number Diff line number Diff line
@@ -615,6 +615,28 @@ static int __maybe_unused iostat_info_seq_show(struct seq_file *seq, 
	return 0;

}



static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,

						void *offset)

{

	struct super_block *sb = seq->private;

	struct f2fs_sb_info *sbi = F2FS_SB(sb);

	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);

	int i;



	seq_puts(seq, "format: victim_secmap bitmaps\n");



	for (i = 0; i < MAIN_SECS(sbi); i++) {

		if ((i % 10) == 0)

			seq_printf(seq, "%-10d", i);

		seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);

		if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))

			seq_putc(seq, '\n');

		else

			seq_putc(seq, ' ');

	}

	return 0;

}



#define F2FS_PROC_FILE_DEF(_name)					\

static int _name##_open_fs(struct inode *inode, struct file *file)	\

{									\
@@ -631,6 +653,7 @@ static const struct file_operations f2fs_seq_##_name##_fops = { \ 
F2FS_PROC_FILE_DEF(segment_info);

F2FS_PROC_FILE_DEF(segment_bits);

F2FS_PROC_FILE_DEF(iostat_info);

F2FS_PROC_FILE_DEF(victim_bits);



int __init f2fs_init_sysfs(void)

{
@@ -681,6 +704,8 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi) 
				 &f2fs_seq_segment_bits_fops, sb);

		proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,

				&f2fs_seq_iostat_info_fops, sb);

		proc_create_data("victim_bits", S_IRUGO, sbi->s_proc,

				&f2fs_seq_victim_bits_fops, sb);

	}

	return 0;

}
@@ -691,6 +716,7 @@ void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 
		remove_proc_entry("iostat_info", sbi->s_proc);

		remove_proc_entry("segment_info", sbi->s_proc);

		remove_proc_entry("segment_bits", sbi->s_proc);

		remove_proc_entry("victim_bits", sbi->s_proc);

		remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);

	}

	kobject_del(&sbi->s_kobj);