f2fs: add info of appended or updated data writes

This patch introduces a inode number list in which represents inodes having
appended data writes or updated data writes after last checkpoint.
This will be used at fsync to determine whether the recovery information
should be written or not.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 4bf203756cf8..430163d8c806 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -326,6 +326,44 @@ static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
 	spin_unlock(&sbi->ino_lock[type]);
 }
 
+void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
+{
+	/* add new dirty ino entry into list */
+	__add_ino_entry(sbi, ino, type);
+}
+
+void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
+{
+	/* remove dirty ino entry from list */
+	__remove_ino_entry(sbi, ino, type);
+}
+
+/* mode should be APPEND_INO or UPDATE_INO */
+bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
+{
+	struct ino_entry *e;
+	spin_lock(&sbi->ino_lock[mode]);
+	e = radix_tree_lookup(&sbi->ino_root[mode], ino);
+	spin_unlock(&sbi->ino_lock[mode]);
+	return e ? true : false;
+}
+
+static void release_dirty_inode(struct f2fs_sb_info *sbi)
+{
+	struct ino_entry *e, *tmp;
+	int i;
+
+	for (i = APPEND_INO; i <= UPDATE_INO; i++) {
+		spin_lock(&sbi->ino_lock[i]);
+		list_for_each_entry_safe(e, tmp, &sbi->ino_list[i], list) {
+			list_del(&e->list);
+			radix_tree_delete(&sbi->ino_root[i], e->ino);
+			kmem_cache_free(ino_entry_slab, e);
+		}
+		spin_unlock(&sbi->ino_lock[i]);
+	}
+}
+
 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
 {
 	int err = 0;
@@ -897,6 +935,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
 
 	if (unlikely(!is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) {
 		clear_prefree_segments(sbi);
+		release_dirty_inode(sbi);
 		F2FS_RESET_SB_DIRT(sbi);
 	}
 }