[GIT PULL] overlayfs update for 5.8

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Hi Linus,

Please pull from:

  git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git tags/ovl-update-5.8

There are some changes outside of the overlayfs tree; clone_private_mount()
was reviewed by Al, the rest are trivial.  No other filesystems are
affected by these.

Fixes:

 - Resolve mount option conflicts consistently.

 - Sync before remount R/O.

 - Fix file handle encoding corner cases.

 - Fix metacopy related issues.

 - Fix an unintialized return value.

 - Add missing permission checks for underlying layers.

Optimizations:

 - Allow multipe whiteouts to share an inode.

 - Optimize small writes by inheriting SB_NOSEC from upper layer.

 - Do not call ->syncfs() multiple times for sync(2).

 - Do not cache negative lookups on upper layer.

 - Make private internal mounts longterm.

Thanks,
Miklos

---
Amir Goldstein (5):
      ovl: resolve more conflicting mount options
      ovl: cleanup non-empty directories in ovl_indexdir_cleanup()
      ovl: prepare to copy up without workdir
      ovl: index dir act as work dir
      ovl: fix out of bounds access warning in ovl_check_fb_len()

Chengguang Xu (3):
      ovl: whiteout inode sharing
      ovl: sync dirty data when remounting to ro mode
      ovl: drop negative dentry in upper layer

Jeffle Xu (1):
      ovl: inherit SB_NOSEC flag from upperdir

Konstantin Khlebnikov (1):
      ovl: skip overlayfs superblocks at global sync

Lubos Dolezel (1):
      ovl: return required buffer size for file handles

Miklos Szeredi (10):
      ovl: pass correct flags for opening real directory
      ovl: switch to mounter creds in readdir
      ovl: verify permissions in ovl_path_open()
      ovl: call secutiry hook in ovl_real_ioctl()
      ovl: check permission to open real file
      ovl: add accessor for ofs->upper_mnt
      ovl: get rid of redundant members in struct ovl_fs
      ovl: make private mounts longterm
      ovl: only pass ->ki_flags to ovl_iocb_to_rwf()
      ovl: make oip->index bool

Vivek Goyal (4):
      ovl: simplify setting of origin for index lookup
      ovl: use only uppermetacopy state in ovl_lookup()
      ovl: initialize OVL_UPPERDATA in ovl_lookup()
      ovl: fix redirect traversal on metacopy dentries

Yuxuan Shui (1):
      ovl: initialize error in ovl_copy_xattr

youngjun (1):
      ovl: remove unnecessary lock check

---
 Documentation/filesystems/overlayfs.rst |   7 +-
 Documentation/filesystems/porting.rst   |   7 +
 fs/namespace.c                          |  16 +++
 fs/overlayfs/copy_up.c                  |   9 +-
 fs/overlayfs/dir.c                      |  51 +++++--
 fs/overlayfs/export.c                   |  24 ++--
 fs/overlayfs/file.c                     |  28 +++-
 fs/overlayfs/inode.c                    |  17 +--
 fs/overlayfs/namei.c                    | 138 ++++++++++--------
 fs/overlayfs/overlayfs.h                |  11 +-
 fs/overlayfs/ovl_entry.h                |  10 +-
 fs/overlayfs/readdir.c                  |  57 ++++++--
 fs/overlayfs/super.c                    | 243 +++++++++++++++++++++-----------
 fs/overlayfs/util.c                     |  36 ++++-
 fs/sync.c                               |   3 +-
 include/linux/fs.h                      |   2 +
 include/linux/mount.h                   |   2 +
 security/security.c                     |   1 +
 18 files changed, 440 insertions(+), 222 deletions(-)



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