[PATCH 0/5] cachefiles, nfs: Fixes

[David Howells]

Hi Linus, Trond, Anna,

Can you pull these fixes for cachefiles and NFS's use of fscache?  Should
they go through the NFS tree or directly upstream?  The things fixed are:

 (1) The reorganisation of bmap() use accidentally caused the return value
     of cachefiles_read_or_alloc_pages() to get corrupted.

 (2) The NFS superblock index key accidentally got changed to include a
     number of kernel pointers - meaning that the key isn't matchable after
     a reboot.

 (3) A redundant check in nfs_fscache_get_super_cookie().

 (4) The NFS change_attr sometimes set in the auxiliary data for the
     caching of an file and sometimes not, which causes the cache to get
     discarded when it shouldn't.

 (5) There's a race between cachefiles_read_waiter() and
     cachefiles_read_copier() that causes an occasional assertion failure.

The patches are tagged here:

	git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
	tag fscache-fixes-20200508-2

Thanks,
David
---
Dave Wysochanski (3):
      NFS: Fix fscache super_cookie index_key from changing after umount
      NFS: Fix fscache super_cookie allocation
      NFSv4: Fix fscache cookie aux_data to ensure change_attr is included

David Howells (1):
      cachefiles: Fix corruption of the return value in cachefiles_read_or_alloc_pages()

Lei Xue (1):
      cachefiles: Fix race between read_waiter and read_copier involving op->to_do


 fs/cachefiles/rdwr.c |   12 ++++++------
 fs/nfs/fscache.c     |   39 ++++++++++++++++++---------------------
 fs/nfs/super.c       |    1 -
 3 files changed, 24 insertions(+), 28 deletions(-)