evie/android_kernel_oneplus_msm8998
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f2fs: add proc entry to show victim_secmap bitmap

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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: Yunlong Song <yunlong.song@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yunlong Song 2018-07-23 22:10:22 +08:00 • committed by Jaegeuk Kim
parent b404b3cbb8
commit bd293daff1
1 changed files with 26 additions and 0 deletions
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26
fs/f2fs/sysfs.c
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@ -615,6 +615,28 @@ static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
return 0; 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) \ #define F2FS_PROC_FILE_DEF(_name) \
static int _name##_open_fs(struct inode *inode, struct file *file) \ 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_info);
F2FS_PROC_FILE_DEF(segment_bits); F2FS_PROC_FILE_DEF(segment_bits);
F2FS_PROC_FILE_DEF(iostat_info); F2FS_PROC_FILE_DEF(iostat_info);
F2FS_PROC_FILE_DEF(victim_bits);
int __init f2fs_init_sysfs(void) 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); &f2fs_seq_segment_bits_fops, sb);
proc_create_data("iostat_info", S_IRUGO, sbi->s_proc, proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,
&f2fs_seq_iostat_info_fops, sb); &f2fs_seq_iostat_info_fops, sb);
proc_create_data("victim_bits", S_IRUGO, sbi->s_proc,
&f2fs_seq_victim_bits_fops, sb);
} }
return 0; 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("iostat_info", sbi->s_proc);
remove_proc_entry("segment_info", sbi->s_proc); remove_proc_entry("segment_info", sbi->s_proc);
remove_proc_entry("segment_bits", 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); remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
} }
kobject_del(&sbi->s_kobj); kobject_del(&sbi->s_kobj);