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xfs: don't allow SWAPEXT if we'd screw up quota accounting

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Since the old SWAPEXT ioctl doesn't know how to adjust quota ids,
bail out of the ids don't match and quotas are enabled.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2020-05-12 16:42:51 -07:00
parent 78bba5c812
commit 765d3c393c
1 changed files with 7 additions and 0 deletions
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7
fs/xfs/xfs_bmap_util.c
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@ -1211,6 +1211,13 @@ xfs_swap_extents_check_format(
struct xfs_inode *tip) /* tmp inode */
{
/* User/group/project quota ids must match if quotas are enforced. */
if (XFS_IS_QUOTA_ON(ip->i_mount) &&
(!uid_eq(VFS_I(ip)->i_uid, VFS_I(tip)->i_uid) ||
!gid_eq(VFS_I(ip)->i_gid, VFS_I(tip)->i_gid) ||
ip->i_d.di_projid != tip->i_d.di_projid))
return -EINVAL;
/* Should never get a local format */
if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL ||
tip->i_d.di_format == XFS_DINODE_FMT_LOCAL)