From 06e1bc05cad8d06860b52c79d4669483c7e39a4f Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 13 May 2015 14:35:14 -0700 Subject: [PATCH] f2fs: truncate data blocks for orphan inode As Hu reported, F2FS has a space leak problem, when conducting: 1) format a 4GB f2fs partition 2) dd a 3G file, 3) unlink it. So, when doing f2fs_drop_inode(), we need to truncate data blocks before skipping it. We can also drop unused caches assigned to each inode. Reported-by: hujianyang Signed-off-by: Jaegeuk Kim --- fs/f2fs/super.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index d5dfd143c394..bfc900e87fcc 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -431,8 +431,30 @@ static int f2fs_drop_inode(struct inode *inode) * - f2fs_gc -> iput -> evict * - inode_wait_for_writeback(inode) */ - if (!inode_unhashed(inode) && inode->i_state & I_SYNC) + if (!inode_unhashed(inode) && inode->i_state & I_SYNC) { + if (!inode->i_nlink && !is_bad_inode(inode)) { + spin_unlock(&inode->i_lock); + + /* some remained atomic pages should discarded */ + if (f2fs_is_atomic_file(inode)) + commit_inmem_pages(inode, true); + + sb_start_intwrite(inode->i_sb); + i_size_write(inode, 0); + + if (F2FS_HAS_BLOCKS(inode)) + f2fs_truncate(inode); + + sb_end_intwrite(inode->i_sb); + +#ifdef CONFIG_F2FS_FS_ENCRYPTION + if (F2FS_I(inode)->i_crypt_info) + f2fs_free_encryption_info(inode); +#endif + spin_lock(&inode->i_lock); + } return 0; + } return generic_drop_inode(inode); } -- 2.20.1