xfs: port to vfs{g,u}id_t and associated helpers

A while ago we introduced a dedicated vfs{g,u}id_t type in commit
1e5267c ("mnt_idmapping: add vfs{g,u}id_t"). We already switched
over a good part of the VFS. Ultimately we will remove all legacy
idmapped mount helpers that operate only on k{g,u}id_t in favor of the
new type safe helpers that operate on vfs{g,u}id_t.

Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

Author: brauner

fs/xfs/xfs_inode.c

@@ -835,9 +835,8 @@ xfs_init_new_inode(
 	 * ID or one of the supplementary group IDs, the S_ISGID bit is cleared
 	 * (and only if the irix_sgid_inherit compatibility variable is set).
 	 */
-	if (irix_sgid_inherit &&
-	    (inode->i_mode & S_ISGID) &&
-	    !in_group_p(i_gid_into_mnt(mnt_userns, inode)))
+	if (irix_sgid_inherit && (inode->i_mode & S_ISGID) &&
+	    !vfsgid_in_group_p(i_gid_into_vfsgid(mnt_userns, inode)))
 		inode->i_mode &= ~S_ISGID;
 
 	ip->i_disk_size = 0;

fs/xfs/xfs_iops.c

@@ -558,6 +558,8 @@ xfs_vn_getattr(
 	struct inode		*inode = d_inode(path->dentry);
 	struct xfs_inode	*ip = XFS_I(inode);
 	struct xfs_mount	*mp = ip->i_mount;
+	vfsuid_t		vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+	vfsgid_t		vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
 
 	trace_xfs_getattr(ip);
 
@@ -568,8 +570,8 @@ xfs_vn_getattr(
 	stat->dev = inode->i_sb->s_dev;
 	stat->mode = inode->i_mode;
 	stat->nlink = inode->i_nlink;
-	stat->uid = i_uid_into_mnt(mnt_userns, inode);
-	stat->gid = i_gid_into_mnt(mnt_userns, inode);
+	stat->uid = vfsuid_into_kuid(vfsuid);
+	stat->gid = vfsgid_into_kgid(vfsgid);
 	stat->ino = ip->i_ino;
 	stat->atime = inode->i_atime;
 	stat->mtime = inode->i_mtime;

fs/xfs/xfs_itable.c

@@ -66,6 +66,8 @@ xfs_bulkstat_one_int(
 	struct xfs_bulkstat	*buf = bc->buf;
 	xfs_extnum_t		nextents;
 	int			error = -EINVAL;
+	vfsuid_t		vfsuid;
+	vfsgid_t		vfsgid;
 
 	if (xfs_internal_inum(mp, ino))
 		goto out_advance;
@@ -81,14 +83,16 @@ xfs_bulkstat_one_int(
 	ASSERT(ip != NULL);
 	ASSERT(ip->i_imap.im_blkno != 0);
 	inode = VFS_I(ip);
+	vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+	vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
 
 	/* xfs_iget returns the following without needing
 	 * further change.
 	 */
 	buf->bs_projectid = ip->i_projid;
 	buf->bs_ino = ino;
-	buf->bs_uid = from_kuid(sb_userns, i_uid_into_mnt(mnt_userns, inode));
-	buf->bs_gid = from_kgid(sb_userns, i_gid_into_mnt(mnt_userns, inode));
+	buf->bs_uid = from_kuid(sb_userns, vfsuid_into_kuid(vfsuid));
+	buf->bs_gid = from_kgid(sb_userns, vfsgid_into_kgid(vfsgid));
 	buf->bs_size = ip->i_disk_size;
 
 	buf->bs_nlink = inode->i_nlink;