From 040cb3786d9b25293b8b0b05b90da0f871e1eb9b Mon Sep 17 00:00:00 2001 From: Li Xi Date: Fri, 8 Jan 2016 16:01:21 -0500 Subject: ext4: adds project ID support Signed-off-by: Li Xi Signed-off-by: Theodore Ts'o Reviewed-by: Andreas Dilger Reviewed-by: Jan Kara --- fs/ext4/namei.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'fs/ext4/namei.c') diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 06c3afcbfac8..2047ff7c5fbc 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -3208,6 +3208,12 @@ static int ext4_link(struct dentry *old_dentry, if (ext4_encrypted_inode(dir) && !ext4_is_child_context_consistent_with_parent(dir, inode)) return -EPERM; + + if ((ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT)) && + (!projid_eq(EXT4_I(dir)->i_projid, + EXT4_I(old_dentry->d_inode)->i_projid))) + return -EXDEV; + err = dquot_initialize(dir); if (err) return err; @@ -3488,6 +3494,11 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, int credits; u8 old_file_type; + if ((ext4_test_inode_flag(new_dir, EXT4_INODE_PROJINHERIT)) && + (!projid_eq(EXT4_I(new_dir)->i_projid, + EXT4_I(old_dentry->d_inode)->i_projid))) + return -EXDEV; + retval = dquot_initialize(old.dir); if (retval) return retval; @@ -3697,6 +3708,14 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry, new.inode))) return -EPERM; + if ((ext4_test_inode_flag(new_dir, EXT4_INODE_PROJINHERIT) && + !projid_eq(EXT4_I(new_dir)->i_projid, + EXT4_I(old_dentry->d_inode)->i_projid)) || + (ext4_test_inode_flag(old_dir, EXT4_INODE_PROJINHERIT) && + !projid_eq(EXT4_I(old_dir)->i_projid, + EXT4_I(new_dentry->d_inode)->i_projid))) + return -EXDEV; + retval = dquot_initialize(old.dir); if (retval) return retval; -- cgit v1.2.3