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authorYunlong Song <yunlong.song@huawei.com>2018-07-23 22:10:22 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2018-08-01 11:52:36 -0700
commit970e348d9829e9fc3091da2fe189ab34a07201e6 (patch)
tree799222833d1de4f7f0170eb4011ef4865c677008 /fs/f2fs/sysfs.c
parentfd8c8caf7e7c8261a92ce0f7f2cd0adb8afd9e0d (diff)
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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: Yunlong Song <yunlong.song@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/sysfs.c')
-rw-r--r--fs/f2fs/sysfs.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index bca1236fd6fa..f22782a0defe 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -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;
+}
+
int __init f2fs_init_sysfs(void)
{
int ret;
@@ -664,6 +686,8 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
segment_bits_seq_show, sb);
proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
iostat_info_seq_show, sb);
+ proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
+ victim_bits_seq_show, sb);
}
return 0;
}
@@ -674,6 +698,7 @@ 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);