[PATCH v7 17/21] NFS: Trace effects of readdirplus on the dcache

[trondmy@kernel.org]

From: Trond Myklebust <trond.myklebust@hammerspace.com>

Trace the effects of readdirplus on attribute and dentry revalidation.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/dir.c      | 5 +++++
 fs/nfs/nfstrace.h | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 41e2d02d8611..95b18d1ad0cf 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -742,8 +742,12 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry,
 			status = nfs_refresh_inode(d_inode(dentry), entry->fattr);
 			if (!status)
 				nfs_setsecurity(d_inode(dentry), entry->fattr);
+			trace_nfs_readdir_lookup_revalidate(d_inode(parent),
+							    dentry, 0, status);
 			goto out;
 		} else {
+			trace_nfs_readdir_lookup_revalidate_failed(
+				d_inode(parent), dentry, 0);
 			d_invalidate(dentry);
 			dput(dentry);
 			dentry = NULL;
@@ -765,6 +769,7 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry,
 		dentry = alias;
 	}
 	nfs_set_verifier(dentry, dir_verifier);
+	trace_nfs_readdir_lookup(d_inode(parent), dentry, 0);
 out:
 	dput(dentry);
 }
diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
index c2d0543ecb2d..7c1102b991d0 100644
--- a/fs/nfs/nfstrace.h
+++ b/fs/nfs/nfstrace.h
@@ -432,6 +432,9 @@ DEFINE_NFS_LOOKUP_EVENT(nfs_lookup_enter);
 DEFINE_NFS_LOOKUP_EVENT_DONE(nfs_lookup_exit);
 DEFINE_NFS_LOOKUP_EVENT(nfs_lookup_revalidate_enter);
 DEFINE_NFS_LOOKUP_EVENT_DONE(nfs_lookup_revalidate_exit);
+DEFINE_NFS_LOOKUP_EVENT(nfs_readdir_lookup);
+DEFINE_NFS_LOOKUP_EVENT(nfs_readdir_lookup_revalidate_failed);
+DEFINE_NFS_LOOKUP_EVENT_DONE(nfs_readdir_lookup_revalidate);
 
 TRACE_EVENT(nfs_atomic_open_enter,
 		TP_PROTO(
-- 
2.35.1