afs: Add directory reload tracepoint

Add a tracepoint (afs_reload_dir) to indicate when a directory is being
reloaded.

Signed-off-by: David Howells <dhowells@redhat.com>

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 378a96a..be5d2f9 100644 (file)
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -309,6 +309,7 @@ retry:
                goto error;
 
        if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) {
+               trace_afs_reload_dir(dvnode);
                ret = afs_fetch_data(dvnode, key, req);
                if (ret < 0)
                        goto error_unlock;

diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index 21b896f..8da9dd5 100644 (file)
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -947,6 +947,23 @@ TRACE_EVENT(afs_flock_op,
                      __entry->from, __entry->len, __entry->flags)
            );
 
+TRACE_EVENT(afs_reload_dir,
+           TP_PROTO(struct afs_vnode *vnode),
+
+           TP_ARGS(vnode),
+
+           TP_STRUCT__entry(
+                   __field_struct(struct afs_fid,      fid             )
+                            ),
+
+           TP_fast_assign(
+                   __entry->fid = vnode->fid;
+                          ),
+
+           TP_printk("%llx:%llx:%x",
+                     __entry->fid.vid, __entry->fid.vnode, __entry->fid.unique)
+           );
+
 #endif /* _TRACE_AFS_H */
 
 /* This part must be outside protection */