tools/cephfs: recover alternate_name of dentries from journal

Right now the cephfs-journal-tool always uses the legacy encoding for dentries
which will drop the alternate_name if ever set.

Fixes: 39f3440
Fixes: https://tracker.ceph.com/issues/64602
Signed-off-by: Patrick Donnelly <[email protected]>

Author: batrick

src/tools/cephfs/JournalTool.cc

@@ -888,7 +888,7 @@ int JournalTool::recover_dentries(
       }
 
       if ((other_pool || write_dentry) && !dry_run) {
-        dout(4) << "writing I dentry " << key << " into frag "
+        dout(4) << "writing i dentry " << key << " into frag "
           << frag_oid.name << dendl;
         dout(20) << " dnfirst = " << fb.dnfirst << dendl;
         if (!fb.alternate_name.empty()) {
@@ -899,11 +899,14 @@ int JournalTool::recover_dentries(
           dout(20) << " alternate_name = b64:" << encoded << dendl;
         }
 
-        // Compose: Dentry format is dnfirst, [I|L], InodeStore(bare=true)
+        // Compose: Dentry format is dnfirst, [i|l], InodeStore
         bufferlist dentry_bl;
         encode(fb.dnfirst, dentry_bl);
-        encode('I', dentry_bl);
-        encode_fullbit_as_inode(fb, true, &dentry_bl);
+        encode('i', dentry_bl);
+        ENCODE_START(2, 1, dentry_bl);
+        encode(fb.alternate_name, dentry_bl);
+        encode_fullbit_as_inode(fb, &dentry_bl);
+        ENCODE_FINISH(dentry_bl);
 
         // Record for writing to RADOS
         write_vals[key] = dentry_bl;
@@ -958,12 +961,15 @@ int JournalTool::recover_dentries(
         dout(4) << "writing L dentry " << key << " into frag "
           << frag_oid.name << dendl;
 
-        // Compose: Dentry format is dnfirst, [I|L], InodeStore(bare=true)
+        // Compose: Dentry format is dnfirst, [I|L], ino, d_type, alternate_name
         bufferlist dentry_bl;
         encode(rb.dnfirst, dentry_bl);
-        encode('L', dentry_bl);
+        encode('l', dentry_bl);
+        ENCODE_START(2, 1, dentry_bl);
         encode(rb.ino, dentry_bl);
         encode(rb.d_type, dentry_bl);
+        encode(rb.alternate_name, dentry_bl);
+        ENCODE_FINISH(dentry_bl);
 
         // Record for writing to RADOS
         write_vals[key] = dentry_bl;
@@ -1082,10 +1088,10 @@ int JournalTool::recover_dentries(
       dout(4) << "writing root ino " << root_oid.name
                << " version " << fb.inode->version << dendl;
 
-      // Compose: root ino format is magic,InodeStore(bare=false)
+      // Compose: root ino format is magic,InodeStore
       bufferlist new_root_ino_bl;
       encode(std::string(CEPH_FS_ONDISK_MAGIC), new_root_ino_bl);
-      encode_fullbit_as_inode(fb, false, &new_root_ino_bl);
+      encode_fullbit_as_inode(fb, &new_root_ino_bl);
 
       // Write to RADOS
       r = output.write_full(root_oid.name, new_root_ino_bl);
@@ -1195,7 +1201,6 @@ int JournalTool::erase_region(JournalScanner const &js, uint64_t const pos, uint
  */
 void JournalTool::encode_fullbit_as_inode(
   const EMetaBlob::fullbit &fb,
-  const bool bare,
   bufferlist *out_bl)
 {
   ceph_assert(out_bl != NULL);
@@ -1210,11 +1215,7 @@ void JournalTool::encode_fullbit_as_inode(
   new_inode.old_inodes = fb.old_inodes;
 
   // Serialize InodeStore
-  if (bare) {
-    new_inode.encode_bare(*out_bl, CEPH_FEATURES_SUPPORTED_DEFAULT);
-  } else {
-    new_inode.encode(*out_bl, CEPH_FEATURES_SUPPORTED_DEFAULT);
-  }
+  new_inode.encode(*out_bl, CEPH_FEATURES_SUPPORTED_DEFAULT);
 }
 
 /**

src/tools/cephfs/JournalTool.h

@@ -78,7 +78,6 @@ class JournalTool : public MDSUtility
     // Backing store helpers
     void encode_fullbit_as_inode(
         const EMetaBlob::fullbit &fb,
-        const bool bare,
         bufferlist *out_bl);
     int consume_inos(const std::set<inodeno_t> &inos);