[git pull] vfs.git inode type handling fixes

[Al Viro]

	We should never change the type bits of ->i_mode or the method tables
(->i_op and ->i_fop) of a live inode.  Unfortunately, not all filesystems
took care to prevent that.

	rc2-based, one trivial conflict in fs/cifs/file.c on merge with mainline

The following changes since commit a38fd8748464831584a19438cbb3082b5a2dab15:

  Linux 5.12-rc2 (2021-03-05 17:33:41 -0800)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.inode-type-fixes

for you to fetch changes up to c4ab036a2f41184ba969f86dda73be361c9ab39d:

  spufs: fix bogosity in S_ISGID handling (2021-03-12 23:13:52 -0500)

----------------------------------------------------------------
Al Viro (12):
      new helper: inode_wrong_type()
      vboxsf: don't allow to change the inode type
      orangefs_inode_is_stale(): i_mode type bits do *not* form a bitmap...
      ocfs2_inode_lock_update(): make sure we don't change the type bits of i_mode
      gfs2: be careful with inode refresh
      do_cifs_create(): don't set ->i_mode of something we had not created
      cifs: have ->mkdir() handle race with another client sanely
      cifs: have cifs_fattr_to_inode() refuse to change type on live inode
      hostfs_mknod(): don't bother with init_special_inode()
      openpromfs: don't do unlock_new_inode() until the new inode is set up
      9p: missing chunk of "fs/9p: Don't update file type when updating file attributes"
      spufs: fix bogosity in S_ISGID handling

David Howells (1):
      afs: Fix updating of i_mode due to 3rd party change

Jeff Layton (2):
      ceph: fix up error handling with snapdirs
      ceph: don't allow type or device number to change on non-I_NEW inodes

 arch/powerpc/platforms/cell/spufs/inode.c | 10 +----
 fs/9p/vfs_inode.c                         |  4 +-
 fs/9p/vfs_inode_dotl.c                    | 14 +++----
 fs/afs/inode.c                            |  6 +--
 fs/ceph/caps.c                            |  8 +++-
 fs/ceph/dir.c                             |  2 +
 fs/ceph/export.c                          |  9 ++--
 fs/ceph/inode.c                           | 41 ++++++++++++++++---
 fs/cifs/cifsproto.h                       |  2 +-
 fs/cifs/dir.c                             | 19 +++++----
 fs/cifs/file.c                            |  2 +-
 fs/cifs/inode.c                           | 57 ++++++++++++--------------
 fs/cifs/readdir.c                         |  4 +-
 fs/fuse/dir.c                             |  6 +--
 fs/fuse/inode.c                           |  2 +-
 fs/fuse/readdir.c                         |  2 +-
 fs/gfs2/glops.c                           | 22 ++++++----
 fs/hostfs/hostfs_kern.c                   |  1 -
 fs/nfs/inode.c                            |  6 +--
 fs/nfsd/nfsproc.c                         |  2 +-
 fs/ocfs2/dlmglue.c                        | 12 +++++-
 fs/openpromfs/inode.c                     | 67 +++++++++++++++---------------
 fs/orangefs/orangefs-utils.c              |  2 +-
 fs/overlayfs/namei.c                      |  4 +-
 fs/vboxsf/dir.c                           |  4 +-
 fs/vboxsf/super.c                         |  4 +-
 fs/vboxsf/utils.c                         | 68 +++++++++++++++++++------------
 fs/vboxsf/vfsmod.h                        |  4 +-
 include/linux/fs.h                        |  5 +++
 29 files changed, 225 insertions(+), 164 deletions(-)