[0/3] COPY/CLONE pagecache invalidation

Message

Benjamin Coddington Nov. 16, 2021, 1:49 p.m. UTC

I found a small issue on the client with generic/432 when testing a server
that supports COPY/CLONE but doesn't have the open file descriptor cache.
Our current knfsd server's cache causes the server to not immediately
hand out a read delegation after a COPY/COMMIT, CLOSE, OPEN, so I suspect
our normal testing didn't catch this issue.

The client bug can be exposed by adding 5 second delays after xfs_io
commands in generic/432, which gives the server enough time to clean up the
cache and give the delegation.

Benjamin Coddington (3):
  NFSv42: Fix pagecache invalidation after COPY/CLONE
  NFSv42: Don't drop NFS_INO_INVALID_CHANGE if we hold a delegation
  NFS: Add a tracepoint to show the results of nfs_set_cache_invalid()

 fs/nfs/inode.c     | 5 ++++-
 fs/nfs/nfs42proc.c | 8 ++++++--
 fs/nfs/nfstrace.h  | 1 +
 3 files changed, 11 insertions(+), 3 deletions(-)