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| author | Chuck Lever <chuck.lever@oracle.com> | 2021-05-14 15:57:08 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-05-18 13:44:04 -0400 |
| commit | 2cde7f8118f0fea29ad73ddcf28817f95adeffd5 (patch) | |
| tree | 6d209f59577e892148492259252474860a7945c9 /fs/nfsd | |
| parent | 3c92fba557c622a53fc166b76dede92863354da1 (diff) | |
| download | lwn-2cde7f8118f0fea29ad73ddcf28817f95adeffd5.tar.gz lwn-2cde7f8118f0fea29ad73ddcf28817f95adeffd5.zip | |
NFSD: Add an nfsd_cb_lm_notify tracepoint
When the server kicks off a CB_LM_NOTIFY callback, record its
arguments so we can better observe asynchronous locking behavior.
For example:
nfsd-998 [002] 1471.705873: nfsd_cb_notify_lock: addr=192.168.2.51:0 client 6092a47c:35a43fc1 fh_hash=0x8950b23a
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 4 | ||||
| -rw-r--r-- | fs/nfsd/trace.h | 26 |
2 files changed, 29 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 377ec4a6a771..d4eee8a47ff3 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -6451,8 +6451,10 @@ nfsd4_lm_notify(struct file_lock *fl) } spin_unlock(&nn->blocked_locks_lock); - if (queue) + if (queue) { + trace_nfsd_cb_notify_lock(lo, nbl); nfsd4_run_cb(&nbl->nbl_cb); + } } static const struct lock_manager_operations nfsd_posix_mng_ops = { diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index fc80879d6077..921323f88322 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -1027,6 +1027,32 @@ TRACE_EVENT(nfsd_cb_done, __entry->status) ); +TRACE_EVENT(nfsd_cb_notify_lock, + TP_PROTO( + const struct nfs4_lockowner *lo, + const struct nfsd4_blocked_lock *nbl + ), + TP_ARGS(lo, nbl), + TP_STRUCT__entry( + __field(u32, cl_boot) + __field(u32, cl_id) + __field(u32, fh_hash) + __array(unsigned char, addr, sizeof(struct sockaddr_in6)) + ), + TP_fast_assign( + const struct nfs4_client *clp = lo->lo_owner.so_client; + + __entry->cl_boot = clp->cl_clientid.cl_boot; + __entry->cl_id = clp->cl_clientid.cl_id; + __entry->fh_hash = knfsd_fh_hash(&nbl->nbl_fh); + memcpy(__entry->addr, &clp->cl_cb_conn.cb_addr, + sizeof(struct sockaddr_in6)); + ), + TP_printk("addr=%pISpc client %08x:%08x fh_hash=0x%08x", + __entry->addr, __entry->cl_boot, __entry->cl_id, + __entry->fh_hash) +); + #endif /* _NFSD_TRACE_H */ #undef TRACE_INCLUDE_PATH |