1 files changed, 84 insertions, 0 deletions
diff --git a/src/client/MetaSession.h b/src/client/MetaSession.h
new file mode 100644
index 000000000..301306263
--- /dev/null
+++ b/src/client/MetaSession.h
@@ -0,0 +1,84 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_CLIENT_METASESSION_H
+#define CEPH_CLIENT_METASESSION_H
+
+#include "include/types.h"
+#include "include/utime.h"
+#include "include/xlist.h"
+#include "mds/MDSMap.h"
+#include "mds/mdstypes.h"
+#include "messages/MClientCapRelease.h"
+
+struct Cap;
+struct Inode;
+struct CapSnap;
+struct MetaRequest;
+
+struct MetaSession {
+  mds_rank_t mds_num;
+  ConnectionRef con;
+  version_t seq = 0;
+  uint64_t cap_gen = 0;
+  utime_t cap_ttl, last_cap_renew_request;
+  uint64_t cap_renew_seq = 0;
+  entity_addrvec_t addrs;
+  feature_bitset_t mds_features;
+  feature_bitset_t mds_metric_flags;
+
+  enum {
+    STATE_NEW, // Unused
+    STATE_OPENING,
+    STATE_OPEN,
+    STATE_CLOSING,
+    STATE_CLOSED,
+    STATE_STALE,
+    STATE_REJECTED,
+  } state = STATE_OPENING;
+
+  enum {
+    RECLAIM_NULL,
+    RECLAIMING,
+    RECLAIM_OK,
+    RECLAIM_FAIL,
+  } reclaim_state = RECLAIM_NULL;
+
+  int mds_state = MDSMap::STATE_NULL;
+  bool readonly = false;
+
+  std::list<Context*> waiting_for_open;
+
+  xlist<Cap*> caps;
+  // dirty_list keeps all the dirty inodes before flushing in current session.
+  xlist<Inode*> dirty_list;
+  xlist<Inode*> flushing_caps;
+  xlist<MetaRequest*> requests;
+  xlist<MetaRequest*> unsafe_requests;
+  std::set<ceph_tid_t> flushing_caps_tids;
+
+  ceph::ref_t<MClientCapRelease> release;
+
+  MetaSession(mds_rank_t mds_num, ConnectionRef con, const entity_addrvec_t& addrs)
+    : mds_num(mds_num), con(con), addrs(addrs) {
+  }
+  ~MetaSession() {
+    ceph_assert(caps.empty());
+    ceph_assert(dirty_list.empty());
+    ceph_assert(flushing_caps.empty());
+    ceph_assert(requests.empty());
+    ceph_assert(unsafe_requests.empty());
+  }
+
+  xlist<Inode*> &get_dirty_list() { return dirty_list; }
+
+  const char *get_state_name() const;
+
+  void dump(Formatter *f, bool cap_dump=false) const;
+
+  void enqueue_cap_release(inodeno_t ino, uint64_t cap_id, ceph_seq_t iseq,
+      ceph_seq_t mseq, epoch_t osd_barrier);
+};
+
+using MetaSessionRef = std::shared_ptr<MetaSession>;
+#endif