[GIT PULL] overlayfs update for 4.10

From: Miklos Szeredi
Date: Sat Dec 10 2016 - 15:49:35 EST

Hi Al,

I usually send overlayfs pulls directly to Linus, but it it suits you, please
feel free to pull from:

git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs-linus

This update contains:

- try to clone on copy-up;
- allow renaming a directory;
- fix data inconsistency of read-only fds after copy up;
- misc cleanups and fixes.


Al Viro (1):
ovl: clean up kstat usage

Amir Goldstein (9):
vfs: allow vfs_clone_file_range() across mount points
vfs: call vfs_clone_file_range() under freeze protection
vfs: fix vfs_clone_file_range() for overlayfs files
ovl: use vfs_clone_file_range() for copy up if possible
ovl: fix nested overlayfs mount
ovl: check for emptiness of redirect dir
ovl: show redirect_dir mount option
ovl: create directories inside merged parent opaque
ovl: fold ovl_copy_up_truncate() into ovl_copy_up()

Geliang Tang (1):
ovl: fix return value of ovl_fill_super

Miklos Szeredi (32):
Revert "af_unix: fix hard linked sockets on overlay"
Revert "vfs: rename: check backing inode being equal"
vfs: no mnt_want_write_file() in vfs_{copy,clone}_file_range()
vfs: allow overlayfs to intercept file ops
vfs: export filp_clone_open()
mm: ovl: copy-up on MAP_SHARED
ovl: update doc
Revert "ovl: get_write_access() in truncate"
ovl: rename ovl_rename2() to ovl_rename()
ovl: treat special files like a regular fs
ovl: don't check rename to self
ovl: don't check sticky
ovl: add ovl_dentry_is_whiteout()
ovl: check lower existence when removing
ovl: get rid of PURE type
ovl: rename: simplify handling of lower/merged directory
ovl: check lower existence of rename target
ovl: simplify lookup
ovl: use d_is_dir()
ovl: split super.c
ovl: check namelen
ovl: consolidate lookup for underlying layers
ovl: lookup redirects
ovl: redirect on rename-dir
ovl: allow redirect_dir to default to "on"
ovl: allow setting max size of redirect
ovl: opaque cleanup
ovl: add infrastructure for intercepting file ops
ovl: intercept read_iter
ovl: intercept mmap
ovl: intercept fsync
Revert "ovl: Warn on copy up if a process has a R/O fd open to the lower file"

Documentation/filesystems/overlayfs.txt | 23 +-
fs/internal.h | 1 -
fs/ioctl.c | 6 +-
fs/namei.c | 6 +-
fs/nfsd/vfs.c | 3 +-
fs/open.c | 2 +-
fs/overlayfs/Kconfig | 14 +
fs/overlayfs/Makefile | 2 +-
fs/overlayfs/copy_up.c | 95 ++----
fs/overlayfs/dir.c | 375 ++++++++++++---------
fs/overlayfs/inode.c | 305 +++++++++++++----
fs/overlayfs/namei.c | 401 +++++++++++++++++++++++
fs/overlayfs/overlayfs.h | 64 ++--
fs/overlayfs/ovl_entry.h | 53 +++
fs/overlayfs/super.c | 558 ++++----------------------------
fs/overlayfs/util.c | 265 +++++++++++++++
fs/read_write.c | 23 +-
include/linux/fs.h | 14 +
mm/util.c | 22 ++
net/unix/af_unix.c | 6 +-
20 files changed, 1391 insertions(+), 847 deletions(-)
create mode 100644 fs/overlayfs/namei.c
create mode 100644 fs/overlayfs/ovl_entry.h
create mode 100644 fs/overlayfs/util.c