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List:       freebsd-hackers
Subject:    should I use a SYSCTL_STRUCT?
From:       Rick Macklem <rmacklem () uoguelph ! ca>
Date:       2011-04-29 20:42:10
Message-ID: 384344635.793652.1304109730387.JavaMail.root () erie ! cs ! uoguelph ! ca
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Hi,

I am at the point where I need to fix the "-z" option of
nfsstat. Currently the stats are acquired/zeroed for the
old NFS subsystem via sysctl. The setup in the kernel is:

SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RW,
	&nfsstats, nfsstats, "S,nfsstats");

The new NFS subsystem currently gets the contents of the
structure via a flag on nfssvc(2).

So, I could either:
- add another flag for nfssvc(2) to zero the structure
OR
- switch the new NFS subsystem over to using a SYSCTL_STRUCT()
  like the above.

Which do you think would be preferable?

Thanks in advance for any info, rick
ps: I got completely lost on the SYSCTL thread in Jan. and
    would rather not start another one like it:-)

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