[GIT PULL] fuse update for 4.20

[Miklos Szeredi]

Hi Linus,

Please pull from:

  git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git tags/fuse-update-4.20

As well as the usual bug fixes, this adds the following new features:

 - cached readdir and readlink
 - max I/O size increased from 128k to 1M
 - improved performance and scalability of request queues
 - copy_file_range support

The only non-fuse bits are trivial cleanups of macros in <linux/bitops.h>.

Thanks,
Miklos

----------------------------------------------------------------
Constantine Shulyupin (1):
      fuse: add max_pages to init_out

Dan Schatzberg (1):
      fuse: enable caching of symlinks

Kirill Tkhai (10):
      fuse: Fix use-after-free in fuse_dev_do_read()
      fuse: Fix use-after-free in fuse_dev_do_write()
      fuse: use list_first_entry() in flush_bg_queue()
      fuse: use READ_ONCE on congestion_threshold and max_background
      fuse: add locking to max_background and congestion_threshold changes
      fuse: introduce fc->bg_lock
      fuse: do not take fc->lock in fuse_request_send_background()
      fuse: change interrupt requests allocation algorithm
      fuse: kill req->intr_unique
      fuse: Use hash table to link processing request

Miklos Szeredi (18):
      fuse: set FR_SENT while locked
      fuse: fix blocked_waitq wakeup
      fuse: split out readdir.c
      fuse: add FOPEN_CACHE_DIR
      fuse: extract fuse_emit() helper
      fuse: allow caching readdir
      fuse: allow using readdir cache
      fuse: add readdir cache version
      fuse: use mtime for readdir cache verification
      fuse: use iversion for readdir cache verification
      fuse: reduce size of struct fuse_inode
      fuse: allocate page array more efficiently
      fuse: realloc page array
      bitops: protect variables in set_mask_bits() macro
      bitops: protect variables in bit_clear_unless() macro
      fuse: allow fine grained attr cache invaldation
      fuse: don't need GETATTR after every READ
      fuse: only invalidate atime in direct read

Niels de Vos (1):
      fuse: add support for copy_file_range()

---
 fs/fuse/Makefile          |   2 +-
 fs/fuse/control.c         |  34 ++-
 fs/fuse/dev.c             | 221 +++++++++++-------
 fs/fuse/dir.c             | 381 +++++++++----------------------
 fs/fuse/file.c            | 158 ++++++++++---
 fs/fuse/fuse_i.h          | 124 ++++++++--
 fs/fuse/inode.c           |  53 +++--
 fs/fuse/readdir.c         | 569 ++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/bitops.h    |  30 +--
 include/uapi/linux/fuse.h | 119 ++++++----
 10 files changed, 1201 insertions(+), 490 deletions(-)
 create mode 100644 fs/fuse/readdir.c