[PATCH v3 0/7] filesystem visibililty ioctls

[Kent Overstreet <kent.overstreet@linux.dev>]

ok, any further bikeshedding better be along the lines of "this will
cause a gaping security hole unless addressed" ;)

changes since v2:
 - now using nak (0x15) ioctl range; documentation updated
 - new helpers for setting the sysfs name
 - sysfs name uuid now has a length field

other notes:
 - fscrypt usage of s_uuid has justification, so we don't need to be
   concerned about exporting that (more) to userspace
 - i haven't updated btrfs for FS_IOC_SYSFS_NAME, less familiar with
   their code so they are cc'd
   ext4 may want this too?

Kent Overstreet (7):
  fs: super_set_uuid()
  overlayfs: Convert to super_set_uuid()
  fs: FS_IOC_GETUUID
  fat: Hook up sb->s_uuid
  fs: FS_IOC_GETSYSFSNAME
  xfs: add support for FS_IOC_GETSYSFSNAME
  bcachefs: add support for FS_IOC_GETSYSFSNAME

 .../userspace-api/ioctl/ioctl-number.rst      |  3 +-
 fs/bcachefs/fs.c                              |  3 +-
 fs/ext4/super.c                               |  2 +-
 fs/f2fs/super.c                               |  2 +-
 fs/fat/inode.c                                |  3 ++
 fs/gfs2/ops_fstype.c                          |  2 +-
 fs/ioctl.c                                    | 33 ++++++++++++
 fs/kernfs/mount.c                             |  4 +-
 fs/ocfs2/super.c                              |  4 +-
 fs/overlayfs/util.c                           | 14 +++--
 fs/ubifs/super.c                              |  2 +-
 fs/xfs/xfs_mount.c                            |  4 +-
 include/linux/fs.h                            | 51 +++++++++++++++++++
 include/uapi/linux/fs.h                       | 27 ++++++++++
 mm/shmem.c                                    |  4 +-
 15 files changed, 142 insertions(+), 16 deletions(-)

-- 
2.43.0