f2fs: add roll-forward recovery process for encrypted dentry

Add roll-forward recovery process for encrypted dentry, so the first fsync
issued to an encrypted file does not need writing checkpoint.

This improves the performance of the following test at thousands of small
files: open -> write -> fsync -> close

Signed-off-by: Shuoran Liu <liushuoran@huawei.com>
Acked-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: modify kernel message to show encrypted names]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 13 insertions, 10 deletions

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 2f38bbb..ba0fc2e 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -96,11 +96,12 @@ static int recover_dentry(struct inode *inode, struct page *ipage,
 	struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
 	nid_t pino = le32_to_cpu(raw_inode->i_pino);
 	struct f2fs_dir_entry *de;
-	struct qstr name;
+	struct fscrypt_name fname;
 	struct page *page;
 	struct inode *dir, *einode;
 	struct fsync_inode_entry *entry;
 	int err = 0;
+	char *name;
 
 	entry = get_fsync_inode(dir_list, pino);
 	if (!entry) {
@@ -120,19 +121,17 @@ static int recover_dentry(struct inode *inode, struct page *ipage,
 
 	dir = entry->inode;
 
-	if (file_enc_name(inode))
-		return 0;
-
-	name.len = le32_to_cpu(raw_inode->i_namelen);
-	name.name = raw_inode->i_name;
+	memset(&fname, 0, sizeof(struct fscrypt_name));
+	fname.disk_name.len = le32_to_cpu(raw_inode->i_namelen);
+	fname.disk_name.name = raw_inode->i_name;
 
-	if (unlikely(name.len > F2FS_NAME_LEN)) {
+	if (unlikely(fname.disk_name.len > F2FS_NAME_LEN)) {
 		WARN_ON(1);
 		err = -ENAMETOOLONG;
 		goto out;
 	}
 retry:
-	de = f2fs_find_entry(dir, &name, &page);
+	de = __f2fs_find_entry(dir, &fname, &page);
 	if (de && inode->i_ino == le32_to_cpu(de->ino))
 		goto out_unmap_put;
 
@@ -156,7 +155,7 @@ retry:
 	} else if (IS_ERR(page)) {
 		err = PTR_ERR(page);
 	} else {
-		err = __f2fs_add_link(dir, &name, inode,
+		err = __f2fs_do_add_link(dir, &fname, inode,
 					inode->i_ino, inode->i_mode);
 	}
 	goto out;
@@ -165,9 +164,13 @@ out_unmap_put:
 	f2fs_dentry_kunmap(dir, page);
 	f2fs_put_page(page, 0);
 out:
+	if (file_enc_name(inode))
+		name = "<encrypted>";
+	else
+		name = raw_inode->i_name;
 	f2fs_msg(inode->i_sb, KERN_NOTICE,
 			"%s: ino = %x, name = %s, dir = %lx, err = %d",
-			__func__, ino_of_node(ipage), raw_inode->i_name,
+			__func__, ino_of_node(ipage), name,
 			IS_ERR(dir) ? 0 : dir->i_ino, err);
 	return err;
 }