[PATCH v4 v4 1/3] ext4: add blocks_allocated to mb_stats output

[Baolin Liu <liubaolin12138@163.com>]

From: Baolin Liu <liubaolin@kylinos.cn>

Add blocks_allocated to /proc/fs/ext4/<dev>/mb_stats so that the
reported statistics match the mballoc summary printed at unmount time.

Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Baolin Liu <liubaolin@kylinos.cn>
---
 fs/ext4/mballoc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 20e9fdaf4301..1e13ef62cb9d 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3211,6 +3211,8 @@ int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset)
 			"\tTo enable, please write \"1\" to sysfs file mb_stats.\n");
 		return 0;
 	}
+	seq_printf(seq, "\tblocks_allocated: %u\n",
+		   atomic_read(&sbi->s_bal_allocated));
 	seq_printf(seq, "\treqs: %u\n", atomic_read(&sbi->s_bal_reqs));
 	seq_printf(seq, "\tsuccess: %u\n", atomic_read(&sbi->s_bal_success));
 
-- 
2.51.0