From 7f43840fd3f9a8f88f809dcad5d3d381e76ba7f3 Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zyan@redhat.com>
Date: Mon, 6 Jul 2020 17:04:51 +0800
Subject: [PATCH] client: encode inode's parent/d_name in cap_reconnect_t

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
---
 src/client/Client.cc |  4 +++-
 src/client/Dentry.h  |  4 ++++
 src/client/Inode.cc  | 16 +++++++++++++---
 src/client/Inode.h   |  1 +
 4 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 62c82d57c1a..038e703dbae 100755
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -1037,6 +1037,8 @@ void Client::update_dentry_lease(Dentry *dn, LeaseStat *dlease, utime_t from, Me
     }
   }
   dn->cap_shared_gen = dn->dir->parent_inode->shared_gen;
+  if (dlease->mask & CEPH_LEASE_PRIMARY_LINK)
+    dn->mark_primary();
 }
 
 
@@ -2825,7 +2827,7 @@ void Client::send_reconnect(MetaSession *session)
 	       << " wants " << ccap_string(in->caps_wanted())
 	       << dendl;
       filepath path;
-      in->make_long_path(path);
+      in->make_short_path(path);
       ldout(cct, 10) << "    path " << path << dendl;
 
       bufferlist flockbl;
diff --git a/src/client/Dentry.h b/src/client/Dentry.h
index ffbb5104b49..7559c45f49b 100644
--- a/src/client/Dentry.h
+++ b/src/client/Dentry.h
@@ -64,6 +64,10 @@ public:
     inode.reset();
     dir->num_null_dentries++;
   }
+  void mark_primary() {
+    if (inode && inode->dentries.front() != this)
+      inode->dentries.push_front(&inode_xlist_link);
+  }
   void detach(void) {
     ceph_assert(!inode);
     auto p = dir->dentries.find(name);
diff --git a/src/client/Inode.cc b/src/client/Inode.cc
index 2b7738adf4a..91bcc815c61 100644
--- a/src/client/Inode.cc
+++ b/src/client/Inode.cc
@@ -95,9 +95,19 @@ void Inode::make_long_path(filepath& p)
     dn->dir->parent_inode->make_long_path(p);
     p.push_dentry(dn->name);
   } else if (snapdir_parent) {
-    snapdir_parent->make_nosnap_relative_path(p);
-    string empty;
-    p.push_dentry(empty);
+    make_nosnap_relative_path(p);
+  } else
+    p = filepath(ino);
+}
+
+void Inode::make_short_path(filepath& p)
+{
+  if (!dentries.empty()) {
+    Dentry *dn = get_first_parent();
+    ceph_assert(dn->dir && dn->dir->parent_inode);
+    p = filepath(dn->name, dn->dir->parent_inode->ino);
+  } else if (snapdir_parent) {
+    make_nosnap_relative_path(p);
   } else
     p = filepath(ino);
 }
diff --git a/src/client/Inode.h b/src/client/Inode.h
index afaf64e0515..5b932a98709 100644
--- a/src/client/Inode.h
+++ b/src/client/Inode.h
@@ -238,6 +238,7 @@ struct Inode {
   }
 
   void make_long_path(filepath& p);
+  void make_short_path(filepath& p);
   void make_nosnap_relative_path(filepath& p);
 
   void get();