[git pull] struct filename series

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

The following changes since commit 0f61b1860cc3f52aef9036d7235ed1f017632193:

  Linux 6.19-rc5 (2026-01-11 17:03:14 -1000)

are available in the Git repository at:

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

for you to fetch changes up to 0787a93baa1aab9fd0cb8500105d11d3d3a58f7a:

  sysfs(2): fs_index() argument is _not_ a pathname (2026-01-16 12:52:04 -0500)

----------------------------------------------------------------
struct filename series

[mostly] sanitize struct filename hanling

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

----------------------------------------------------------------
Al Viro (67):
      init_mknod(): turn into a trivial wrapper for do_mknodat()
      init_mkdir(): turn into a trivial wrapper for do_mkdirat()
      init_symlink(): turn into a trivial wrapper for do_symlinkat()
      init_link(): turn into a trivial wrapper for do_linkat()
      allow to use CLASS() for struct filename *
      do_faccessat(): import pathname only once
      do_fchmodat(): import pathname only once
      do_fchownat(): import pathname only once
      do_utimes_path(): import pathname only once
      chdir(2): import pathname only once
      chroot(2): import pathname only once
      user_statfs(): import pathname only once
      do_sys_truncate(): import pathname only once
      do_readlinkat(): import pathname only once
      get rid of audit_reusename()
      ntfs: ->d_compare() must not block
      getname_flags() massage, part 1
      getname_flags() massage, part 2
      struct filename: use names_cachep only for getname() and friends
      struct filename: saner handling of long names
      switch __getname_maybe_null() to CLASS(filename_flags)
      allow incomplete imports of filenames
      struct filename ->refcnt doesn't need to be atomic
      file_getattr(): filename_lookup() accepts ERR_PTR() as filename
      file_setattr(): filename_lookup() accepts ERR_PTR() as filename
      move_mount(): filename_lookup() accepts ERR_PTR() as filename
      ksmbd_vfs_path_lookup(): vfs_path_parent_lookup() accepts ERR_PTR() as name
      ksmbd_vfs_rename(): vfs_path_parent_lookup() accepts ERR_PTR() as name
      do_filp_open(): DTRT when getting ERR_PTR() as pathname
      rename do_filp_open() to do_file_open()
      do_sys_openat2(): get rid of useless check, switch to CLASS(filename)
      simplify the callers of file_open_name()
      simplify the callers of do_open_execat()
      simplify the callers of alloc_bprm()
      execve: fold {compat_,}do_execve{,at}() into their sole callers
      do_execveat_common(): don't consume filename reference
      switch {alloc,free}_bprm() to CLASS()
      non-consuming variant of do_renameat2()
      non-consuming variant of do_linkat()
      non-consuming variant of do_symlinkat()
      non-consuming variant of do_mkdirat()
      non-consuming variant of do_mknodat()
      non-consuming variants of do_{unlinkat,rmdir}()
      filename_...xattr(): don't consume filename reference
      file_[gs]etattr(2): switch to CLASS(filename_maybe_null)
      mount_setattr(2): don't mess with LOOKUP_EMPTY
      do_open_execat(): don't care about LOOKUP_EMPTY
      vfs_open_tree(): use CLASS(filename_uflags)
      name_to_handle_at(): use CLASS(filename_uflags)
      fspick(2): use CLASS(filename_flags)
      do_fchownat(): unspaghettify a bit...
      chdir(2): unspaghettify a bit...
      do_utimes_path(): switch to CLASS(filename_uflags)
      do_sys_truncate(): switch to CLASS(filename)
      do_readlinkat(): switch to CLASS(filename_flags)
      do_f{chmod,chown,access}at(): use CLASS(filename_uflags)
      namei.c: convert getname_kernel() callers to CLASS(filename_kernel)
      namei.c: switch user pathname imports to CLASS(filename{,_flags})
      move_mount(2): switch to CLASS(filename_maybe_null)
      chroot(2): switch to CLASS(filename)
      quotactl_block(): switch to CLASS(filename)
      statx: switch to CLASS(filename_maybe_null)
      user_statfs(): switch to CLASS(filename)
      mqueue: switch to CLASS(filename)
      ksmbd: use CLASS(filename_kernel)
      alpha: switch osf_mount() to strndup_user()
      sysfs(2): fs_index() argument is _not_ a pathname

Mateusz Guzik (1):
      fs: hide names_cache behind runtime const machinery

 Documentation/filesystems/porting.rst |  11 +
 arch/alpha/kernel/osf_sys.c           |  34 +--
 fs/coredump.c                         |   3 +-
 fs/dcache.c                           |   8 +-
 fs/exec.c                             | 178 +++++---------
 fs/fhandle.c                          |   5 +-
 fs/file_attr.c                        |  12 +-
 fs/filesystems.c                      |   9 +-
 fs/fsopen.c                           |   6 +-
 fs/init.c                             |  98 ++------
 fs/internal.h                         |  17 +-
 fs/namei.c                            | 420 ++++++++++++++++++----------------
 fs/namespace.c                        |  22 +-
 fs/ntfs3/dir.c                        |   5 +-
 fs/ntfs3/fsntfs.c                     |   4 +-
 fs/ntfs3/inode.c                      |  13 +-
 fs/ntfs3/namei.c                      |  17 +-
 fs/ntfs3/xattr.c                      |   5 +-
 fs/open.c                             | 119 ++++------
 fs/quota/quota.c                      |   3 +-
 fs/smb/server/vfs.c                   |  15 +-
 fs/stat.c                             |  28 +--
 fs/statfs.c                           |   3 +-
 fs/utimes.c                           |   8 +-
 fs/xattr.c                            |  33 +--
 include/asm-generic/vmlinux.lds.h     |   3 +-
 include/linux/audit.h                 |  11 -
 include/linux/fs.h                    |  41 ++--
 io_uring/fs.c                         | 106 +++++----
 io_uring/openclose.c                  |  26 +--
 io_uring/statx.c                      |  17 +-
 io_uring/xattr.c                      |  30 +--
 ipc/mqueue.c                          |  11 +-
 kernel/acct.c                         |   4 +-
 kernel/auditsc.c                      |  29 +--
 mm/huge_memory.c                      |  15 +-
 mm/swapfile.c                         |  21 +-
 37 files changed, 563 insertions(+), 827 deletions(-)