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Commit f991492e authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

vfs: teach vfs_ioc_fssetxattr_check to check project id info 



Standardize the project id checks for FSSETXATTR.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
parent 7b0e492e

fs/ext4/ioctl.c

+0 −27
Original line number Diff line number Diff line
@@ -697,30 +697,6 @@ static long ext4_ioctl_group_add(struct file *file, 
	return err;

}



static int ext4_ioctl_check_project(struct inode *inode, struct fsxattr *fa)

{

	/*

	 * Project Quota ID state is only allowed to change from within the init

	 * namespace. Enforce that restriction only if we are trying to change

	 * the quota ID state. Everything else is allowed in user namespaces.

	 */

	if (current_user_ns() == &init_user_ns)

		return 0;



	if (__kprojid_val(EXT4_I(inode)->i_projid) != fa->fsx_projid)

		return -EINVAL;



	if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT)) {

		if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))

			return -EINVAL;

	} else {

		if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)

			return -EINVAL;

	}



	return 0;

}



static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)

{

	struct ext4_inode_info *ei = EXT4_I(inode);
@@ -1133,9 +1109,6 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 


		inode_lock(inode);

		ext4_fill_fsxattr(inode, &old_fa);

		err = ext4_ioctl_check_project(inode, &fa);

		if (err)

			goto out;

		err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);

		if (err)

			goto out;

fs/inode.c

+13 −0
Original line number Diff line number Diff line
@@ -2214,6 +2214,19 @@ int vfs_ioc_fssetxattr_check(struct inode *inode, const struct fsxattr *old_fa, 
	    !capable(CAP_LINUX_IMMUTABLE))

		return -EPERM;



	/*

	 * Project Quota ID state is only allowed to change from within the init

	 * namespace. Enforce that restriction only if we are trying to change

	 * the quota ID state. Everything else is allowed in user namespaces.

	 */

	if (current_user_ns() != &init_user_ns) {

		if (old_fa->fsx_projid != fa->fsx_projid)

			return -EINVAL;

		if ((old_fa->fsx_xflags ^ fa->fsx_xflags) &

				FS_XFLAG_PROJINHERIT)

			return -EINVAL;

	}



	return 0;

}

EXPORT_SYMBOL(vfs_ioc_fssetxattr_check);

fs/xfs/xfs_ioctl.c

+0 −15
Original line number Diff line number Diff line
@@ -1298,21 +1298,6 @@ xfs_ioctl_setattr_check_projid( 
	if (fa->fsx_projid > (uint16_t)-1 &&

	    !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))

		return -EINVAL;



	/*

	 * Project Quota ID state is only allowed to change from within the init

	 * namespace. Enforce that restriction only if we are trying to change

	 * the quota ID state. Everything else is allowed in user namespaces.

	 */

	if (current_user_ns() == &init_user_ns)

		return 0;



	if (xfs_get_projid(ip) != fa->fsx_projid)

		return -EINVAL;

	if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=

	    (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))

		return -EINVAL;



	return 0;

}