1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "librbd/io/AioCompletion.h"
7 #include "common/ceph_context.h"
8 #include "common/dout.h"
9 #include "common/errno.h"
10 #include "common/perf_counters.h"
11 #include "common/WorkQueue.h"
13 #include "librbd/ImageCtx.h"
14 #include "librbd/internal.h"
16 #include "librbd/Journal.h"
19 #include "tracing/librbd.h"
21 #define tracepoint(...)
24 #define dout_subsys ceph_subsys_rbd
26 #define dout_prefix *_dout << "librbd::io::AioCompletion: " << this \
27 << " " << __func__ << ": "
32 int AioCompletion::wait_for_complete() {
33 tracepoint(librbd, aio_wait_for_complete_enter, this);
35 while (state != AIO_STATE_COMPLETE)
38 tracepoint(librbd, aio_wait_for_complete_exit, 0);
42 void AioCompletion::finalize(ssize_t rval)
44 assert(lock.is_locked());
45 assert(ictx != nullptr);
46 CephContext *cct = ictx->cct;
48 ldout(cct, 20) << "r=" << rval << dendl;
49 if (rval >= 0 && aio_type == AIO_TYPE_READ) {
50 read_result.assemble_result(cct);
54 void AioCompletion::complete() {
55 assert(lock.is_locked());
56 assert(ictx != nullptr);
57 CephContext *cct = ictx->cct;
59 tracepoint(librbd, aio_complete_enter, this, rval);
61 elapsed = ceph_clock_now() - start_time;
63 case AIO_TYPE_GENERIC:
68 ictx->perfcounter->tinc(l_librbd_rd_latency, elapsed); break;
70 ictx->perfcounter->tinc(l_librbd_wr_latency, elapsed); break;
71 case AIO_TYPE_DISCARD:
72 ictx->perfcounter->tinc(l_librbd_discard_latency, elapsed); break;
74 ictx->perfcounter->tinc(l_librbd_aio_flush_latency, elapsed); break;
75 case AIO_TYPE_WRITESAME:
76 ictx->perfcounter->tinc(l_librbd_ws_latency, elapsed); break;
77 case AIO_TYPE_COMPARE_AND_WRITE:
78 ictx->perfcounter->tinc(l_librbd_cmp_latency, elapsed); break;
80 lderr(cct) << "completed invalid aio_type: " << aio_type << dendl;
84 // inform the journal that the op has successfully committed
85 if (journal_tid != 0) {
86 assert(ictx->journal != NULL);
87 ictx->journal->commit_io_event(journal_tid, rval);
90 state = AIO_STATE_CALLBACK;
93 complete_cb(rbd_comp, complete_arg);
97 if (ictx && event_notify && ictx->event_socket.is_valid()) {
98 ictx->completed_reqs_lock.Lock();
99 ictx->completed_reqs.push_back(&m_xlist_item);
100 ictx->completed_reqs_lock.Unlock();
101 ictx->event_socket.notify();
104 state = AIO_STATE_COMPLETE;
107 // note: possible for image to be closed after op marked finished
108 if (async_op.started()) {
109 async_op.finish_op();
111 tracepoint(librbd, aio_complete_exit);
114 void AioCompletion::init_time(ImageCtx *i, aio_type_t t) {
115 Mutex::Locker locker(lock);
116 if (ictx == nullptr) {
119 start_time = ceph_clock_now();
123 void AioCompletion::start_op(bool ignore_type) {
124 Mutex::Locker locker(lock);
125 assert(ictx != nullptr);
126 assert(!async_op.started());
127 if (state == AIO_STATE_PENDING &&
128 (ignore_type || aio_type != AIO_TYPE_FLUSH)) {
129 async_op.start_op(*ictx);
133 void AioCompletion::fail(int r)
136 assert(ictx != nullptr);
137 CephContext *cct = ictx->cct;
139 lderr(cct) << cpp_strerror(r) << dendl;
140 assert(pending_count == 0);
146 void AioCompletion::set_request_count(uint32_t count) {
148 assert(ictx != nullptr);
149 CephContext *cct = ictx->cct;
151 ldout(cct, 20) << "pending=" << count << dendl;
152 assert(pending_count == 0);
153 pending_count = count;
156 // if no pending requests, completion will fire now
160 void AioCompletion::complete_request(ssize_t r)
163 assert(ictx != nullptr);
164 CephContext *cct = ictx->cct;
167 if (r < 0 && r != -EEXIST)
172 assert(pending_count);
173 int count = --pending_count;
175 ldout(cct, 20) << "cb=" << complete_cb << ", "
176 << "pending=" << pending_count << dendl;
177 if (!count && blockers == 0) {
184 void AioCompletion::associate_journal_event(uint64_t tid) {
185 Mutex::Locker l(lock);
186 assert(state == AIO_STATE_PENDING);
190 bool AioCompletion::is_complete() {
191 tracepoint(librbd, aio_is_complete_enter, this);
194 Mutex::Locker l(lock);
195 done = this->state == AIO_STATE_COMPLETE;
197 tracepoint(librbd, aio_is_complete_exit, done);
201 ssize_t AioCompletion::get_return_value() {
202 tracepoint(librbd, aio_get_return_value_enter, this);
206 tracepoint(librbd, aio_get_return_value_exit, r);
211 } // namespace librbd