+++ /dev/null
-// -*- 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
Code Review / stor4nfv.git / blobdiff