NFSv4: Add tracepoints for debugging rename

Add tracepoints to debug renames.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 6bd65c2c820b..6388db847017 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -461,6 +461,49 @@ DEFINE_NFS4_LOOKUP_EVENT(nfs4_remove);
 DEFINE_NFS4_LOOKUP_EVENT(nfs4_get_fs_locations);
 DEFINE_NFS4_LOOKUP_EVENT(nfs4_secinfo);
 
+TRACE_EVENT(nfs4_rename,
+                TP_PROTO(
+                        const struct inode *olddir,
+                        const struct qstr *oldname,
+                        const struct inode *newdir,
+                        const struct qstr *newname,
+                        int error
+                ),
+
+                TP_ARGS(olddir, oldname, newdir, newname, error),
+
+                TP_STRUCT__entry(
+                        __field(dev_t, dev)
+                        __field(int, error)
+                        __field(u64, olddir)
+                        __string(oldname, oldname->name)
+                        __field(u64, newdir)
+                        __string(newname, newname->name)
+                ),
+
+                TP_fast_assign(
+                        __entry->dev = olddir->i_sb->s_dev;
+                        __entry->olddir = NFS_FILEID(olddir);
+                        __entry->newdir = NFS_FILEID(newdir);
+                        __entry->error = error;
+                        __assign_str(oldname, oldname->name);
+                        __assign_str(newname, newname->name);
+                ),
+
+                TP_printk(
+                        "error=%d (%s) oldname=%02x:%02x:%llu/%s "
+                        "newname=%02x:%02x:%llu/%s",
+                        __entry->error,
+                        show_nfsv4_errors(__entry->error),
+                        MAJOR(__entry->dev), MINOR(__entry->dev),
+                        (unsigned long long)__entry->olddir,
+                        __get_str(oldname),
+                        MAJOR(__entry->dev), MINOR(__entry->dev),
+                        (unsigned long long)__entry->newdir,
+                        __get_str(newname)
+                )
+);
+
 DECLARE_EVENT_CLASS(nfs4_inode_event,
                 TP_PROTO(
                         const struct inode *inode,