FileStore: set replay guard on create_collection

This should prevent sequences like:

rmcoll a
mkcoll a
touch a foo
<crash>

from causing trouble by preventing the rmcoll
and mkcoll from being replayed.

Fixes: 4064
Backport: bobtail
Signed-off-by: Samuel Just <sam.just@inktank.com>

2 files changed, 26 insertions, 1 deletions

diff --git a/src/os/FileStore.cc b/src/os/FileStore.cc
index ba23563a82a..9ce7550d9a5 100644
--- a/src/os/FileStore.cc
+++ b/src/os/FileStore.cc
@@ -2481,7 +2481,7 @@ unsigned FileStore::_do_transaction(Transaction& t, uint64_t op_seq, int trans_n
       {
 	coll_t cid = i.get_cid();
 	if (_check_replay_guard(cid, spos) > 0)
-	  r = _create_collection(cid);
+	  r = _create_collection(cid, spos);
       }
       break;
 
@@ -4467,6 +4467,30 @@ ObjectMap::ObjectMapIterator FileStore::get_omap_iterator(coll_t c,
   return object_map->get_iterator(hoid);
 }
 
+int FileStore::_create_collection(
+  coll_t c,
+  const SequencerPosition &spos)
+{
+  char fn[PATH_MAX];
+  get_cdir(c, fn, sizeof(fn));
+  dout(15) << "create_collection " << fn << dendl;
+  int r = ::mkdir(fn, 0755);
+  if (r < 0)
+    r = -errno;
+  if (r == -EEXIST && replaying)
+    r = 0;
+  dout(10) << "create_collection " << fn << " = " << r << dendl;
+
+  if (r < 0)
+    return r;
+  r = init_index(c);
+  if (r < 0)
+    return r;
+  _set_replay_guard(c, spos);
+  return 0;
+}
+
+// DEPRECATED -- remove with _split_collection_create
 int FileStore::_create_collection(coll_t c) 
 {
   char fn[PATH_MAX];
diff --git a/src/os/FileStore.h b/src/os/FileStore.h
index 7e450ceb82c..3336e59378e 100644
--- a/src/os/FileStore.h
+++ b/src/os/FileStore.h
@@ -453,6 +453,7 @@ public:
   ObjectMap::ObjectMapIterator get_omap_iterator(coll_t c, const hobject_t &hoid);
 
   int _create_collection(coll_t c);
+  int _create_collection(coll_t c, const SequencerPosition &spos);
   int _destroy_collection(coll_t c);
   int _collection_add(coll_t c, coll_t ocid, const hobject_t& o,
 		      const SequencerPosition& spos);