[git pull] rename fixes

[Al Viro <viro@zeniv.linux.org.uk>]

The following changes since commit 4a0b33f771db2b82fdfad08b9f34def786162865:

  selinux: saner handling of policy reloads (2023-11-16 12:45:33 -0500)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git tags/pull-rename

for you to fetch changes up to a8b0026847b8c43445c921ad2c85521c92eb175f:

  rename(): avoid a deadlock in the case of parents having no common ancestor (2023-11-25 02:54:14 -0500)

Two trivial conflicts - in Documentation/filesystems/porting.rst and in
fs/overlayfs/copy_up.c.  The former is "append vs. append", the latter -
dput(temp) added by overlayfs tree inside an if () with condition slightly
massaged in this branch.

----------------------------------------------------------------
fix directory locking scheme on rename

broken in 6.5; we really can't lock two unrelated directories
without holding ->s_vfs_rename_mutex first and in case of
same-parent rename of a subdirectory 6.5 ends up doing just
that.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

----------------------------------------------------------------
Al Viro (5):
      udf_rename(): only access the child content on cross-directory rename
      ext4: don't access the source subdirectory content on same-directory rename
      rename(): fix the locking of subdirectories
      kill lock_two_inodes()
      rename(): avoid a deadlock in the case of parents having no common ancestor

Jan Kara (4):
      reiserfs: Avoid touching renamed directory if parent does not change
      ocfs2: Avoid touching renamed directory if parent does not change
      ext2: Avoid reading renamed directory if parent does not change
      f2fs: Avoid reading renamed directory if parent does not change

 Documentation/filesystems/directory-locking.rst | 349 +++++++++++++++++-------
 Documentation/filesystems/locking.rst           |   5 +-
 Documentation/filesystems/porting.rst           |  27 ++
 fs/cachefiles/namei.c                           |   2 +
 fs/ecryptfs/inode.c                             |   2 +
 fs/ext2/namei.c                                 |  11 +-
 fs/ext4/namei.c                                 |  21 +-
 fs/f2fs/namei.c                                 |  15 +-
 fs/inode.c                                      |  49 +---
 fs/internal.h                                   |   2 -
 fs/namei.c                                      |  87 ++++--
 fs/nfsd/vfs.c                                   |   4 +
 fs/ocfs2/namei.c                                |   8 +-
 fs/overlayfs/copy_up.c                          |   9 +-
 fs/overlayfs/dir.c                              |   4 +
 fs/overlayfs/super.c                            |   6 +-
 fs/overlayfs/util.c                             |   7 +-
 fs/reiserfs/namei.c                             |  54 ++--
 fs/smb/server/vfs.c                             |   5 +
 fs/udf/namei.c                                  |   7 +-
 20 files changed, 442 insertions(+), 232 deletions(-)