Re: linux-next: manual merge of the pidfd tree with the xfs tree

Stephen Rothwell
2021-01-27T07:33:04Z

[-- Attachment #1: Type: text/plain, Size: 1758 bytes --]

Hi all,

On Mon, 25 Jan 2021 17:14:14 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> Today's linux-next merge of the pidfd tree got a conflict in:
>
> fs/xfs/xfs_inode.c
>
> between commit:
>
> 01ea173e103e ("xfs: fix up non-directory creation in SGID directories")
>
> from the xfs tree and commit:
>
> f736d93d76d3 ("xfs: support idmapped mounts")
>
> from the pidfd tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> diff --cc fs/xfs/xfs_inode.c
> index e2a1db4cee43,95b7f2ba4e06..000000000000
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@@ -809,13 -810,13 +810,13 @@@ xfs_init_new_inode
> inode->i_rdev = rdev;
> ip->i_d.di_projid = prid;
>
> - if (pip && XFS_INHERIT_GID(pip)) {
> - inode->i_gid = VFS_I(pip)->i_gid;
> - if ((VFS_I(pip)->i_mode & S_ISGID) && S_ISDIR(mode))
> - inode->i_mode |= S_ISGID;
> + if (dir && !(dir->i_mode & S_ISGID) &&
> + (mp->m_flags & XFS_MOUNT_GRPID)) {
> + inode->i_uid = current_fsuid();

Looking a bit harder, I replaced the above line with
inode->i_uid = fsuid_into_mnt(mnt_userns);

> + inode->i_gid = dir->i_gid;
> + inode->i_mode = mode;
> } else {
> - inode_init_owner(inode, dir, mode);
> - inode->i_gid = fsgid_into_mnt(mnt_userns);
> ++ inode_init_owner(mnt_userns, inode, dir, mode);
> }
>
> /*