X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Flibrbd%2Fio%2FAioCompletion.cc;fp=src%2Fceph%2Fsrc%2Flibrbd%2Fio%2FAioCompletion.cc;h=1dc6280959c2e261c7505374088da5bc98adec52;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/librbd/io/AioCompletion.cc b/src/ceph/src/librbd/io/AioCompletion.cc
new file mode 100644
index 0000000..1dc6280
--- /dev/null
+++ b/src/ceph/src/librbd/io/AioCompletion.cc
@@ -0,0 +1,211 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/io/AioCompletion.h"
+#include <errno.h>
+
+#include "common/ceph_context.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "common/perf_counters.h"
+#include "common/WorkQueue.h"
+
+#include "librbd/ImageCtx.h"
+#include "librbd/internal.h"
+
+#include "librbd/Journal.h"
+
+#ifdef WITH_LTTNG
+#include "tracing/librbd.h"
+#else
+#define tracepoint(...)
+#endif
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::io::AioCompletion: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace io {
+
+int AioCompletion::wait_for_complete() {
+  tracepoint(librbd, aio_wait_for_complete_enter, this);
+  lock.Lock();
+  while (state != AIO_STATE_COMPLETE)
+    cond.Wait(lock);
+  lock.Unlock();
+  tracepoint(librbd, aio_wait_for_complete_exit, 0);
+  return 0;
+}
+
+void AioCompletion::finalize(ssize_t rval)
+{
+  assert(lock.is_locked());
+  assert(ictx != nullptr);
+  CephContext *cct = ictx->cct;
+
+  ldout(cct, 20) << "r=" << rval << dendl;
+  if (rval >= 0 && aio_type == AIO_TYPE_READ) {
+    read_result.assemble_result(cct);
+  }
+}
+
+void AioCompletion::complete() {
+  assert(lock.is_locked());
+  assert(ictx != nullptr);
+  CephContext *cct = ictx->cct;
+
+  tracepoint(librbd, aio_complete_enter, this, rval);
+  utime_t elapsed;
+  elapsed = ceph_clock_now() - start_time;
+  switch (aio_type) {
+  case AIO_TYPE_GENERIC:
+  case AIO_TYPE_OPEN:
+  case AIO_TYPE_CLOSE:
+    break;
+  case AIO_TYPE_READ:
+    ictx->perfcounter->tinc(l_librbd_rd_latency, elapsed); break;
+  case AIO_TYPE_WRITE:
+    ictx->perfcounter->tinc(l_librbd_wr_latency, elapsed); break;
+  case AIO_TYPE_DISCARD:
+    ictx->perfcounter->tinc(l_librbd_discard_latency, elapsed); break;
+  case AIO_TYPE_FLUSH:
+    ictx->perfcounter->tinc(l_librbd_aio_flush_latency, elapsed); break;
+  case AIO_TYPE_WRITESAME:
+    ictx->perfcounter->tinc(l_librbd_ws_latency, elapsed); break;
+  case AIO_TYPE_COMPARE_AND_WRITE:
+    ictx->perfcounter->tinc(l_librbd_cmp_latency, elapsed); break;
+  default:
+    lderr(cct) << "completed invalid aio_type: " << aio_type << dendl;
+    break;
+  }
+
+  // inform the journal that the op has successfully committed
+  if (journal_tid != 0) {
+    assert(ictx->journal != NULL);
+    ictx->journal->commit_io_event(journal_tid, rval);
+  }
+
+  state = AIO_STATE_CALLBACK;
+  if (complete_cb) {
+    lock.Unlock();
+    complete_cb(rbd_comp, complete_arg);
+    lock.Lock();
+  }
+
+  if (ictx && event_notify && ictx->event_socket.is_valid()) {
+    ictx->completed_reqs_lock.Lock();
+    ictx->completed_reqs.push_back(&m_xlist_item);
+    ictx->completed_reqs_lock.Unlock();
+    ictx->event_socket.notify();
+  }
+
+  state = AIO_STATE_COMPLETE;
+  cond.Signal();
+
+  // note: possible for image to be closed after op marked finished
+  if (async_op.started()) {
+    async_op.finish_op();
+  }
+  tracepoint(librbd, aio_complete_exit);
+}
+
+void AioCompletion::init_time(ImageCtx *i, aio_type_t t) {
+  Mutex::Locker locker(lock);
+  if (ictx == nullptr) {
+    ictx = i;
+    aio_type = t;
+    start_time = ceph_clock_now();
+  }
+}
+
+void AioCompletion::start_op(bool ignore_type) {
+  Mutex::Locker locker(lock);
+  assert(ictx != nullptr);
+  assert(!async_op.started());
+  if (state == AIO_STATE_PENDING &&
+      (ignore_type || aio_type != AIO_TYPE_FLUSH)) {
+    async_op.start_op(*ictx);
+  }
+}
+
+void AioCompletion::fail(int r)
+{
+  lock.Lock();
+  assert(ictx != nullptr);
+  CephContext *cct = ictx->cct;
+
+  lderr(cct) << cpp_strerror(r) << dendl;
+  assert(pending_count == 0);
+  rval = r;
+  complete();
+  put_unlock();
+}
+
+void AioCompletion::set_request_count(uint32_t count) {
+  lock.Lock();
+  assert(ictx != nullptr);
+  CephContext *cct = ictx->cct;
+
+  ldout(cct, 20) << "pending=" << count << dendl;
+  assert(pending_count == 0);
+  pending_count = count;
+  lock.Unlock();
+
+  // if no pending requests, completion will fire now
+  unblock();
+}
+
+void AioCompletion::complete_request(ssize_t r)
+{
+  lock.Lock();
+  assert(ictx != nullptr);
+  CephContext *cct = ictx->cct;
+
+  if (rval >= 0) {
+    if (r < 0 && r != -EEXIST)
+      rval = r;
+    else if (r > 0)
+      rval += r;
+  }
+  assert(pending_count);
+  int count = --pending_count;
+
+  ldout(cct, 20) << "cb=" << complete_cb << ", "
+                 << "pending=" << pending_count << dendl;
+  if (!count && blockers == 0) {
+    finalize(rval);
+    complete();
+  }
+  put_unlock();
+}
+
+void AioCompletion::associate_journal_event(uint64_t tid) {
+  Mutex::Locker l(lock);
+  assert(state == AIO_STATE_PENDING);
+  journal_tid = tid;
+}
+
+bool AioCompletion::is_complete() {
+  tracepoint(librbd, aio_is_complete_enter, this);
+  bool done;
+  {
+    Mutex::Locker l(lock);
+    done = this->state == AIO_STATE_COMPLETE;
+  }
+  tracepoint(librbd, aio_is_complete_exit, done);
+  return done;
+}
+
+ssize_t AioCompletion::get_return_value() {
+  tracepoint(librbd, aio_get_return_value_enter, this);
+  lock.Lock();
+  ssize_t r = rval;
+  lock.Unlock();
+  tracepoint(librbd, aio_get_return_value_exit, r);
+  return r;
+}
+
+} // namespace io
+} // namespace librbd