[0/2] Improvements to nfsd stats

Message

Amir Goldstein Dec. 28, 2020, 5:03 p.m. UTC

Hi Bruce,

The original motivation for this work was to add per-export stats.
While doing so, I noticed that most nfsd stats variables are not
protected against concurrent update, so fixed that first.

There are still a couple stats variables (longest_chain*) that are
not counters so less trivial to fix. I did not touch them.

There is also an eyebrow raising number of variabled in nfsd_stats
struct that are never updated. I did not touch those either.
If you want me to send a cleanup patch to remove them and print
hardcoded zeroes in the nfsd stats file I can do that.

Thanks,
Amir.

Amir Goldstein (2):
  nfsd: protect concurrent access to nfsd stats counters
  nfsd: report per-export stats

 fs/nfsd/export.c   | 68 +++++++++++++++++++++++++++++++-----
 fs/nfsd/export.h   | 17 +++++++++
 fs/nfsd/netns.h    | 20 +++++++----
 fs/nfsd/nfs4proc.c |  2 +-
 fs/nfsd/nfscache.c | 52 +++++++++++++++++++--------
 fs/nfsd/nfsctl.c   |  8 ++++-
 fs/nfsd/nfsfh.c    |  9 +++--
 fs/nfsd/stats.c    | 87 ++++++++++++++++++++++++++++++++++++----------
 fs/nfsd/stats.h    | 42 +++++++++++++++-------
 fs/nfsd/vfs.c      |  6 ++--
 10 files changed, 243 insertions(+), 68 deletions(-)