Hi-
As I've been working on various server bugs, I've been adding
tracepoints that record NFS operation arguments. Here's a snapshot
of this work for your review and comment.
The idea here is to provide a degree of NFS traffic observability
without needing network capture. Tracepoints are generally lighter-
weight than full network capture, allowing effective capture-time
data reduction:
- One or a handful of these can be enabled at a time
- Each tracepoint records much less data per operation than capture
- Extra capture-time filtering can reduce data amount even further
- Some of these operations are infrequent enough that their
tracepoint could be enabled persistently without a significant
performance impact (for example, for security auditing)
I've also pushed these patches into a topic branch:
git://git.linux-nfs.org/projects/cel/cel-2.6.git nfsd-more-tracepoints
There is probably more work to be done. For example, one thing I'd
like to do is move client-side helpers (like the macro to display
NFS4ERR status codes symbolically) into an include file that can be
shared with server tracepoints.
---
Chuck Lever (21):
NFSD: Add SPDK header for fs/nfsd/trace.c
SUNRPC: Move the svc_xdr_recvfrom() tracepoint
SUNRPC: Add svc_xdr_authenticate tracepoint
NFSD: Clean up the show_nf_may macro
NFSD: Remove extra "0x" in tracepoint format specifier
NFSD: Constify @fh argument of knfsd_fh_hash()
NFSD: Add tracepoint in nfsd_setattr()
NFSD: Add tracepoint for nfsd_access()
NFSD: nfsd_compound_status tracepoint should record XID
NFSD: Add client ID lifetime tracepoints
NFSD: Add tracepoints to report NFSv4 session state
NFSD: Add a tracepoint to report the current filehandle
NFSD: Add GETATTR tracepoint
NFSD: Add tracepoint in nfsd4_stateid_preprocess()
NFSD: Add tracepoint to report arguments to NFSv4 OPEN
NFSD: Add CLOSE tracepoint
NFSD: Add a tracepoint for DELEGRETURN
NFSD: Add a lookup tracepoint
NFSD: Add lock and locku tracepoints
NFSD: Add tracepoints to record the result of TEST_STATEID and FREE_STATEID
NFSD: Rename nfsd_ tracepoints to nfsd4_
fs/nfsd/nfs3proc.c | 3 +
fs/nfsd/nfs4callback.c | 28 +-
fs/nfsd/nfs4layouts.c | 16 +-
fs/nfsd/nfs4proc.c | 39 +-
fs/nfsd/nfs4state.c | 103 ++--
fs/nfsd/nfsfh.h | 7 +-
fs/nfsd/nfsproc.c | 3 +
fs/nfsd/trace.c | 2 +
fs/nfsd/trace.h | 1083 +++++++++++++++++++++++++++++++--
fs/nfsd/vfs.c | 21 +-
include/trace/events/sunrpc.h | 25 +-
net/sunrpc/svc_xprt.c | 4 +-
net/sunrpc/svcauth.c | 5 +-
13 files changed, 1151 insertions(+), 188 deletions(-)
--
Chuck Lever
