f2fs crypto: add filename encryption for roll-forward recovery
This patch adds a bit flag to indicate whether or not i_name in the inode
is encrypted.
If this name is encrypted, we can't do recover_dentry during roll-forward.
So, f2fs_sync_file() needs to do checkpoint, if this will be needed in future.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index bc8992e..c857f82 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -517,7 +517,8 @@
if (err)
goto put_out_dir;
- if (update_dent_inode(old_inode, &new_dentry->d_name)) {
+ if (update_dent_inode(old_inode, new_inode,
+ &new_dentry->d_name)) {
release_orphan_inode(sbi);
goto put_out_dir;
}
@@ -557,6 +558,8 @@
down_write(&F2FS_I(old_inode)->i_sem);
file_lost_pino(old_inode);
+ if (new_inode && file_enc_name(new_inode))
+ file_set_enc_name(old_inode);
up_write(&F2FS_I(old_inode)->i_sem);
old_inode->i_ctime = CURRENT_TIME;
@@ -659,13 +662,17 @@
f2fs_lock_op(sbi);
- err = update_dent_inode(old_inode, &new_dentry->d_name);
+ err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name);
if (err)
goto out_unlock;
+ if (file_enc_name(new_inode))
+ file_set_enc_name(old_inode);
- err = update_dent_inode(new_inode, &old_dentry->d_name);
+ err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name);
if (err)
goto out_undo;
+ if (file_enc_name(old_inode))
+ file_set_enc_name(new_inode);
/* update ".." directory entry info of old dentry */
if (old_dir_entry)
@@ -723,8 +730,11 @@
f2fs_sync_fs(sbi->sb, 1);
return 0;
out_undo:
- /* Still we may fail to recover name info of f2fs_inode here */
- update_dent_inode(old_inode, &old_dentry->d_name);
+ /*
+ * Still we may fail to recover name info of f2fs_inode here
+ * Drop it, once its name is set as encrypted
+ */
+ update_dent_inode(old_inode, old_inode, &old_dentry->d_name);
out_unlock:
f2fs_unlock_op(sbi);
out_new_dir: