[GIT PULL] rename2 syscall

[Miklos Szeredi]

Linus,

Could you please consider pulling the cross-rename patches.  The git tree has a
conflict in arch/x86/syscalls/syscall_64.tbl where the syscall number needs to
be fixed.  The patchset has been reviewed by Jan Kara and the man page and
usperpace API by Michael Kerrisk.

  git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git cross-rename

This series adds a new syscall, renameat2(), which is the same as renameat() but
with a flags argument.

The purpose of extending rename is to add cross-rename, a symmetric variant of
rename, which exchanges the two files.  This allows interesting things, which
were not possible before, for example atomically replacing a directory tree with
a symlink, etc...  This also allows overlayfs and friends to operate on
whiteouts atomically.

Andy Lutomirski also suggested a "noreplace" flag, which disables the
overwriting behavior of rename.

These two flags, RENAME_EXCHANGE and RENAME_NOREPLACE are only implemented for
ext4 as an example and for testing.

Thanks,
Miklos
----

Miklos Szeredi (11):
      vfs: add d_is_dir()
      vfs: rename: move d_move() up
      vfs: rename: use common code for dir and non-dir
      vfs: add renameat2 syscall
      vfs: add RENAME_NOREPLACE flag
      security: add flags to rename hooks
      vfs: add cross-rename
      ext4: rename: create ext4_renament structure for local vars
      ext4: rename: move EMLINK check up
      ext4: rename: split out helper functions
      ext4: add cross rename support

---
 Documentation/filesystems/Locking                  |   2 +-
 Documentation/filesystems/vfs.txt                  |   4 +-
 arch/x86/syscalls/syscall_64.tbl                   |   1 +
 .../lustre/lustre/include/linux/lustre_compat25.h  |   4 +-
 drivers/staging/lustre/lustre/llite/namei.c        |   3 +-
 drivers/staging/lustre/lustre/lvfs/lvfs_linux.c    |   2 +-
 fs/9p/v9fs.h                                       |   3 +-
 fs/9p/vfs_inode.c                                  |   4 +-
 fs/affs/affs.h                                     |   3 +-
 fs/affs/namei.c                                    |   3 +-
 fs/afs/dir.c                                       |   6 +-
 fs/bad_inode.c                                     |   3 +-
 fs/bfs/dir.c                                       |   3 +-
 fs/btrfs/inode.c                                   |   3 +-
 fs/cachefiles/namei.c                              |   4 +-
 fs/ceph/dir.c                                      |   3 +-
 fs/cifs/cifsfs.h                                   |   2 +-
 fs/cifs/inode.c                                    |   3 +-
 fs/coda/dir.c                                      |   8 +-
 fs/dcache.c                                        |  46 ++-
 fs/debugfs/inode.c                                 |   2 +-
 fs/ecryptfs/inode.c                                |   5 +-
 fs/exofs/namei.c                                   |   3 +-
 fs/ext2/namei.c                                    |   5 +-
 fs/ext3/namei.c                                    |   5 +-
 fs/ext4/namei.c                                    | 396 ++++++++++++++-------
 fs/ext4/super.c                                    |   6 +-
 fs/f2fs/namei.c                                    |   3 +-
 fs/fat/namei_msdos.c                               |   3 +-
 fs/fat/namei_vfat.c                                |   3 +-
 fs/fuse/dir.c                                      |   3 +-
 fs/gfs2/inode.c                                    |   3 +-
 fs/hfs/dir.c                                       |   3 +-
 fs/hfsplus/dir.c                                   |   3 +-
 fs/hostfs/hostfs_kern.c                            |   5 +-
 fs/hpfs/namei.c                                    |   3 +-
 fs/jffs2/dir.c                                     |   5 +-
 fs/jfs/namei.c                                     |   3 +-
 fs/libfs.c                                         |   3 +-
 fs/logfs/dir.c                                     |   3 +-
 fs/minix/namei.c                                   |   5 +-
 fs/namei.c                                         | 317 +++++++++--------
 fs/ncpfs/dir.c                                     |   5 +-
 fs/nfs/dir.c                                       |   3 +-
 fs/nfs/internal.h                                  |   3 +-
 fs/nfsd/vfs.c                                      |   2 +-
 fs/nilfs2/namei.c                                  |   3 +-
 fs/ocfs2/namei.c                                   |   3 +-
 fs/omfs/dir.c                                      |   3 +-
 fs/reiserfs/namei.c                                |   3 +-
 fs/sysv/namei.c                                    |   5 +-
 fs/ubifs/dir.c                                     |   3 +-
 fs/udf/namei.c                                     |   3 +-
 fs/ufs/namei.c                                     |   3 +-
 fs/xfs/xfs_iops.c                                  |   3 +-
 include/linux/dcache.h                             |   8 +-
 include/linux/fs.h                                 |   7 +-
 include/linux/security.h                           |  12 +-
 include/uapi/linux/fs.h                            |   3 +
 kernel/cgroup.c                                    |   5 +-
 mm/shmem.c                                         |   2 +-
 security/security.c                                |  22 +-
 62 files changed, 631 insertions(+), 367 deletions(-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/