f2fs: fix to release discard entries during checkpoint

In f2fs_fill_super, if there is any IO error occurs during recovery,
cached discard entries will be leaked, in order to avoid this, make
write_checkpoint() handle memory release by itself, besides, move
clear_prefree_segments to write_checkpoint for readability.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 7e9b504..7db2aa2 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1184,7 +1184,6 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
        if (unlikely(f2fs_cp_error(sbi)))
                return -EIO;
 
-       clear_prefree_segments(sbi, cpc);
        clear_sbi_flag(sbi, SBI_IS_DIRTY);
        clear_sbi_flag(sbi, SBI_NEED_CP);
 
@@ -1261,8 +1260,12 @@ int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 
        /* unlock all the fs_lock[] in do_checkpoint() */
        err = do_checkpoint(sbi, cpc);
-
-       f2fs_wait_all_discard_bio(sbi);
+       if (err) {
+               release_discard_addrs(sbi);
+       } else {
+               clear_prefree_segments(sbi, cpc);
+               f2fs_wait_all_discard_bio(sbi);
+       }
 
        unblock_operations(sbi);
        stat_inc_cp_count(sbi->stat_info);

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 6132b4c..bfa4414 100644 (file)
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -738,7 +738,6 @@ static void f2fs_put_super(struct super_block *sb)
         * In addition, EIO will skip do checkpoint, we need this as well.
         */
        release_ino_entry(sbi, true);
-       release_discard_addrs(sbi);
 
        f2fs_leave_shrinker(sbi);
        mutex_unlock(&sbi->umount_mutex);