nfs: add a tracepoint to nfs_inode_detach_delegation_locked

We have tracepoints for setting a delegation and reclaiming them. Add a
tracepoint for when the delegation is being detached from the inode.

Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20250618-nfs-tracepoints-v2-2-540c9fb48da2@kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 10ef46e29b2544920c026f023885301d5d8e22cd..78a97d340bbd98390ca8302176c17caf08dcab4a 100644 (file)
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -355,6 +355,8 @@ nfs_detach_delegation_locked(struct nfs_inode *nfsi,
                rcu_dereference_protected(nfsi->delegation,
                                lockdep_is_held(&clp->cl_lock));
 
+       trace_nfs4_detach_delegation(&nfsi->vfs_inode, delegation->type);
+
        if (deleg_cur == NULL || delegation != deleg_cur)
                return NULL;
 

diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 9f69d7e149255b632ca89f7e1c6c3943a6c5341f..674f15e91c544e22fc3da4cb750b4aeb8271bc07 100644 (file)
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -983,6 +983,7 @@ DECLARE_EVENT_CLASS(nfs4_set_delegation_event,
                        TP_ARGS(inode, fmode))
 DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_set_delegation);
 DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_reclaim_delegation);
+DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_detach_delegation);
 
 TRACE_EVENT(nfs4_delegreturn_exit,
                TP_PROTO(