From: Xiubo Li <xiubli@redhat.com>
Date: Mon, 19 Apr 2021 02:34:02 +0000 (+0800)
Subject: mds: make the lost+found dir accessible from clients
X-Git-Tag: v15.2.14~86^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=c5362b8464bdafbea7556acdee9e877b71ed4f8d;p=ceph.git

mds: make the lost+found dir accessible from clients

Inode number 0x4 is reserved for the lost+found dir, and the apps
or recovery apps need to access it.

At the same time the 0x3 is reserved for the global snaprealm, which
will also be lookup by the clients when looking up the snaprealm inodes.

Here will make all the inode less than 100 accessible by clients.

Fixes: https://tracker.ceph.com/issues/50216
Signed-off-by: Xiubo Li <xiubli@redhat.com>
(cherry picked from commit 841071b3602aa2b8bcca57b95cdf671d48036a34)

Conflicts:
	src/mds/Server.cc
- code being changed does not exist in octopus: change omitted
---

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 81f50c9cdf98..96d7f5f2f1db 100755
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -133,8 +133,8 @@ void client_flush_set_callback(void *p, ObjectCacher::ObjectSet *oset)
 }
 
 bool Client::is_reserved_vino(vinodeno_t &vino) {
-  if (vino.ino < MDS_INO_SYSTEM_BASE && vino.ino != CEPH_INO_ROOT) {
-    ldout(cct, -1) << __func__ << "attempt to access reserved inode number " << vino << dendl;
+  if (MDS_IS_PRIVATE_INO(vino.ino)) {
+    ldout(cct, -1) << __func__ << " attempt to access reserved inode number " << vino << dendl;
     return true;
   }
   return false;
diff --git a/src/mds/mdstypes.h b/src/mds/mdstypes.h
index b8ca0c5d5319..d8e3efde619c 100644
--- a/src/mds/mdstypes.h
+++ b/src/mds/mdstypes.h
@@ -64,6 +64,8 @@
 #define MDS_INO_STRAY_OWNER(i) (signed (((unsigned (i)) - MDS_INO_STRAY_OFFSET) / NUM_STRAY))
 #define MDS_INO_STRAY_INDEX(i) (((unsigned (i)) - MDS_INO_STRAY_OFFSET) % NUM_STRAY)
 
+#define MDS_IS_PRIVATE_INO(i) ((i) < MDS_INO_SYSTEM_BASE && (i) >= MDS_INO_MDSDIR_OFFSET)
+
 typedef int32_t mds_rank_t;
 constexpr mds_rank_t MDS_RANK_NONE = -1;