NFSv4: Add tracepoints for debugging the idmapper
Add tracepoints to help debug uid/gid mappings to username/group.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 900f233..f58edcf 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -627,6 +627,52 @@
DEFINE_NFS4_INODE_EVENT(nfs4_recall_delegation);
DEFINE_NFS4_INODE_EVENT(nfs4_delegreturn);
+DECLARE_EVENT_CLASS(nfs4_idmap_event,
+ TP_PROTO(
+ const char *name,
+ int len,
+ u32 id,
+ int error
+ ),
+
+ TP_ARGS(name, len, id, error),
+
+ TP_STRUCT__entry(
+ __field(int, error)
+ __field(u32, id)
+ __dynamic_array(char, name, len > 0 ? len + 1 : 1)
+ ),
+
+ TP_fast_assign(
+ if (len < 0)
+ len = 0;
+ __entry->error = error < 0 ? error : 0;
+ __entry->id = id;
+ memcpy(__get_dynamic_array(name), name, len);
+ ((char *)__get_dynamic_array(name))[len] = 0;
+ ),
+
+ TP_printk(
+ "error=%d id=%u name=%s",
+ __entry->error,
+ __entry->id,
+ __get_str(name)
+ )
+);
+#define DEFINE_NFS4_IDMAP_EVENT(name) \
+ DEFINE_EVENT(nfs4_idmap_event, name, \
+ TP_PROTO( \
+ const char *name, \
+ int len, \
+ u32 id, \
+ int error \
+ ), \
+ TP_ARGS(name, len, id, error))
+DEFINE_NFS4_IDMAP_EVENT(nfs4_map_name_to_uid);
+DEFINE_NFS4_IDMAP_EVENT(nfs4_map_group_to_gid);
+DEFINE_NFS4_IDMAP_EVENT(nfs4_map_uid_to_name);
+DEFINE_NFS4_IDMAP_EVENT(nfs4_map_gid_to_group);
+
#endif /* _TRACE_NFS4_H */
#undef TRACE_INCLUDE_PATH