The following set of patches adds support for simulating 'change attributes'
in NFSv2/v3 by converting the file ctime into a 64-bit value that can
be stored in inode->i_version.
With this change, we can then proceed to simplify the attribute cache
consistency code so that it only uses the change attribute to determine
whether or not the data and attribute caches are consistent.
Once the cache consistency only depends on the change attribute, we
can optimise away unnecessary requests for the directory post-op
attributes on NFSv4 OPEN, CREATE, REMOVE, LINK and RENAME compounds,
since those operations all supply a 'change_info4' field describing
the directory change attribute.
Finally, we can stop requesting cache consistency attributes altogether
for O_DIRECT writes and commits (they are uncached) as well as for
delegated writes and commits.
Trond Myklebust (10):
NFSv4: Fix a typo in NFS4_enc_link_sz
NFSv4: Delegreturn only needs the cache consistency bitmask
NFS: Simplify nfs_fhget()
NFS: Change attribute updates should set NFS_INO_REVAL_PAGECACHE
NFSv2/v3: Simulate the change attribute
NFS: Simplify the cache invalidation code
NFSv4: Simplify the NFSv4 OPEN compound
NFSv4: Simplify the NFSv4 CREATE compound
NFSv4: Simplify the NFSv4 REMOVE, LINK and RENAME compounds
NFSv4: Don't request cache consistency attributes on some writes and
commits
fs/nfs/client.c | 2 +-
fs/nfs/inode.c | 58 ++++++++-------------------------
fs/nfs/internal.h | 12 +++++++
fs/nfs/nfs2xdr.c | 2 +
fs/nfs/nfs3xdr.c | 3 ++
fs/nfs/nfs4proc.c | 81 +++++++++++++++++++----------------------------
fs/nfs/nfs4xdr.c | 76 ++++----------------------------------------
include/linux/nfs_xdr.h | 11 ++-----
8 files changed, 75 insertions(+), 170 deletions(-)
--
1.7.7.6
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