ceph/src/librbd/object_map/Request.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "librbd/object_map/Request.h"
   5 #include "common/dout.h"
   6 #include "common/errno.h"
   7 #include "common/RWLock.h"
   8 #include "librbd/ImageCtx.h"
   9 #include "librbd/object_map/InvalidateRequest.h"
  10
  11 #define dout_subsys ceph_subsys_rbd
  12 #undef dout_prefix
  13 #define dout_prefix *_dout << "librbd::object_map::Request: "
  14
  15 namespace librbd {
  16 namespace object_map {
  17
  18 bool Request::should_complete(int r) {
  19   CephContext *cct = m_image_ctx.cct;
  20   ldout(cct, 20) << this << " should_complete: r=" << r << dendl;
  21
  22   switch (m_state)
  23   {
  24   case STATE_REQUEST:
  25     if (r < 0) {
  26       lderr(cct) << "failed to update object map: " << cpp_strerror(r)
  27                  << dendl;
  28       return invalidate();
  29     }
  30
  31     finish_request();
  32     return true;
  33
  34   case STATE_INVALIDATE:
  35     ldout(cct, 20) << "INVALIDATE" << dendl;
  36     if (r < 0) {
  37       lderr(cct) << "failed to invalidate object map: " << cpp_strerror(r)
  38                  << dendl;
  39     }
  40     return true;
  41
  42   default:
  43     lderr(cct) << "invalid state: " << m_state << dendl;
  44     assert(false);
  45     break;
  46   }
  47   return false;
  48 }
  49
  50 bool Request::invalidate() {
  51   bool flags_set;
  52   int r = m_image_ctx.test_flags(RBD_FLAG_OBJECT_MAP_INVALID, &flags_set);
  53   if (r == 0 && flags_set) {
  54     return true;
  55   }
  56
  57   m_state = STATE_INVALIDATE;
  58
  59   RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
  60   RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
  61   InvalidateRequest<> *req = new InvalidateRequest<>(m_image_ctx, m_snap_id,
  62                                                      true,
  63                                                      create_callback_context());
  64   req->send();
  65   return false;
  66 }
  67
  68 } // namespace object_map
  69 } // namespace librbd