ceph/src/client/Dentry.h

   1 #ifndef CEPH_CLIENT_DENTRY_H
   2 #define CEPH_CLIENT_DENTRY_H
   3
   4 #include "include/lru.h"
   5 #include "include/xlist.h"
   6
   7 #include "mds/mdstypes.h"
   8 #include "InodeRef.h"
   9
  10 class Dir;
  11 struct Inode;
  12
  13 class Dentry : public LRUObject {
  14  public:
  15   string   name;                      // sort of lame
  16   //const char *name;
  17   Dir      *dir;
  18   InodeRef inode;
  19   int      ref;                       // 1 if there's a dir beneath me.
  20   int64_t offset;
  21   mds_rank_t lease_mds;
  22   utime_t lease_ttl;
  23   uint64_t lease_gen;
  24   ceph_seq_t lease_seq;
  25   int cap_shared_gen;
  26
  27   /*
  28    * ref==1 -> cached, unused
  29    * ref >1 -> pinned in lru
  30    */
  31   void get() {
  32     assert(ref > 0);
  33     if (++ref == 2)
  34       lru_pin();
  35     //cout << "dentry.get on " << this << " " << name << " now " << ref << std::endl;
  36   }
  37   void put() {
  38     assert(ref > 0);
  39     if (--ref == 1)
  40       lru_unpin();
  41     //cout << "dentry.put on " << this << " " << name << " now " << ref << std::endl;
  42     if (ref == 0)
  43       delete this;
  44   }
  45
  46   void dump(Formatter *f) const;
  47
  48   Dentry() :
  49     dir(0), ref(1), offset(0),
  50     lease_mds(-1), lease_gen(0), lease_seq(0), cap_shared_gen(0)
  51   { }
  52 private:
  53   ~Dentry() {
  54     assert(ref == 0);
  55   }
  56 };
  57
  58
  59
  60
  61
  62 #endif