ceph/src/messages/MOSDPGScan.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPH_MOSDPGSCAN_H
  16 #define CEPH_MOSDPGSCAN_H
  17
  18 #include "MOSDFastDispatchOp.h"
  19
  20 class MOSDPGScan : public MOSDFastDispatchOp {
  21
  22   static const int HEAD_VERSION = 2;
  23   static const int COMPAT_VERSION = 2;
  24
  25 public:
  26   enum {
  27     OP_SCAN_GET_DIGEST = 1,      // just objects and versions
  28     OP_SCAN_DIGEST = 2,          // result
  29   };
  30   const char *get_op_name(int o) const {
  31     switch (o) {
  32     case OP_SCAN_GET_DIGEST: return "get_digest";
  33     case OP_SCAN_DIGEST: return "digest";
  34     default: return "???";
  35     }
  36   }
  37
  38   __u32 op;
  39   epoch_t map_epoch, query_epoch;
  40   pg_shard_t from;
  41   spg_t pgid;
  42   hobject_t begin, end;
  43
  44   epoch_t get_map_epoch() const override {
  45     return map_epoch;
  46   }
  47   epoch_t get_min_epoch() const override {
  48     return query_epoch;
  49   }
  50   spg_t get_spg() const override {
  51     return pgid;
  52   }
  53
  54   void decode_payload() override {
  55     bufferlist::iterator p = payload.begin();
  56     ::decode(op, p);
  57     ::decode(map_epoch, p);
  58     ::decode(query_epoch, p);
  59     ::decode(pgid.pgid, p);
  60     ::decode(begin, p);
  61     ::decode(end, p);
  62
  63     // handle hobject_t format upgrade
  64     if (!begin.is_max() && begin.pool == -1)
  65       begin.pool = pgid.pool();
  66     if (!end.is_max() && end.pool == -1)
  67       end.pool = pgid.pool();
  68
  69     ::decode(from, p);
  70     ::decode(pgid.shard, p);
  71   }
  72
  73   void encode_payload(uint64_t features) override {
  74     ::encode(op, payload);
  75     ::encode(map_epoch, payload);
  76     ::encode(query_epoch, payload);
  77     ::encode(pgid.pgid, payload);
  78     ::encode(begin, payload);
  79     ::encode(end, payload);
  80     ::encode(from, payload);
  81     ::encode(pgid.shard, payload);
  82   }
  83
  84   MOSDPGScan()
  85     : MOSDFastDispatchOp(MSG_OSD_PG_SCAN, HEAD_VERSION, COMPAT_VERSION) {}
  86   MOSDPGScan(__u32 o, pg_shard_t from,
  87              epoch_t e, epoch_t qe, spg_t p, hobject_t be, hobject_t en)
  88     : MOSDFastDispatchOp(MSG_OSD_PG_SCAN, HEAD_VERSION, COMPAT_VERSION),
  89       op(o),
  90       map_epoch(e), query_epoch(e),
  91       from(from),
  92       pgid(p),
  93       begin(be), end(en) {
  94   }
  95 private:
  96   ~MOSDPGScan() override {}
  97
  98 public:
  99   const char *get_type_name() const override { return "pg_scan"; }
 100   void print(ostream& out) const override {
 101     out << "pg_scan(" << get_op_name(op)
 102         << " " << pgid
 103         << " " << begin << "-" << end
 104         << " e " << map_epoch << "/" << query_epoch
 105         << ")";
 106   }
 107 };
 108
 109 #endif