linux-kernel - [PATCH 08/10] afs: Add directory reload tracepoint

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Message-ID: <155269082170.8537.8590577690754637263.stgit@warthog.procyon.org.uk>
Date:   Fri, 15 Mar 2019 23:00:21 +0000
From:   David Howells <dhowells@...hat.com>
To:     linux-afs@...ts.infradead.org
Cc:     dhowells@...hat.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 08/10] 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@...hat.com>
---

 fs/afs/dir.c               |    1 +
 include/trace/events/afs.h |   17 +++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 378a96a1116e..be5d2f932b77 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -309,6 +309,7 @@ static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key)
 		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 21b896fabb2f..8da9dd5bc2b6 100644
--- 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 */