This is a note to let you know that I've just added the patch titled
NFSD: Add an nfsd_cb_lm_notify tracepoint
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-add-an-nfsd_cb_lm_notify-tracepoint.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7b3d780e8eedc9da77d38ce6f46e3a8ea7c5dad6
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Fri May 14 15:57:08 2021 -0400
NFSD: Add an nfsd_cb_lm_notify tracepoint
[ Upstream commit 2cde7f8118f0fea29ad73ddcf28817f95adeffd5 ]
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@xxxxxxxxxx>
Cc: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index a8aa3680605bb..89054fe68aca6 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -6494,8 +6494,10 @@ 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 86e0656bdb779..bed7d5d49fee4 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
