[PATCH v2 1/4] nfs: add cache_validity to the nfs_inode_event tracepoints

[Jeff Layton <jlayton@kernel.org>]

Managing the cache_validity flags is the deep voodoo of NFS cache
coherency. Let's have a little extra visibility into that value via the
nfs_inode_event tracepoints.

Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/nfs/nfstrace.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
index 7a058bd8c566e2976e24136e2901fbaa7070daac..55170cbf2ff115c85f56cbafb4fc0e06313918cf 100644
--- a/fs/nfs/nfstrace.h
+++ b/fs/nfs/nfstrace.h
@@ -56,6 +56,7 @@ DECLARE_EVENT_CLASS(nfs_inode_event,
 			__field(u32, fhandle)
 			__field(u64, fileid)
 			__field(u64, version)
+			__field(unsigned long, cache_validity)
 		),
 
 		TP_fast_assign(
@@ -64,14 +65,17 @@ DECLARE_EVENT_CLASS(nfs_inode_event,
 			__entry->fileid = nfsi->fileid;
 			__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
 			__entry->version = inode_peek_iversion_raw(inode);
+			__entry->cache_validity = nfsi->cache_validity;
 		),
 
 		TP_printk(
-			"fileid=%02x:%02x:%llu fhandle=0x%08x version=%llu ",
+			"fileid=%02x:%02x:%llu fhandle=0x%08x version=%llu cache_validity=0x%lx (%s)",
 			MAJOR(__entry->dev), MINOR(__entry->dev),
 			(unsigned long long)__entry->fileid,
 			__entry->fhandle,
-			(unsigned long long)__entry->version
+			(unsigned long long)__entry->version,
+			__entry->cache_validity,
+			nfs_show_cache_validity(__entry->cache_validity)
 		)
 );
 

-- 
2.49.0