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7c673cae FG |
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/io/AioCompletion.h" | |
5 | #include <errno.h> | |
6 | ||
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" | |
12 | ||
13 | #include "librbd/ImageCtx.h" | |
14 | #include "librbd/internal.h" | |
7c673cae | 15 | #include "librbd/Journal.h" |
b32b8144 | 16 | #include "librbd/Types.h" |
7c673cae FG |
17 | |
18 | #ifdef WITH_LTTNG | |
19 | #include "tracing/librbd.h" | |
20 | #else | |
21 | #define tracepoint(...) | |
22 | #endif | |
23 | ||
24 | #define dout_subsys ceph_subsys_rbd | |
25 | #undef dout_prefix | |
26 | #define dout_prefix *_dout << "librbd::io::AioCompletion: " << this \ | |
27 | << " " << __func__ << ": " | |
28 | ||
29 | namespace librbd { | |
30 | namespace io { | |
31 | ||
32 | int AioCompletion::wait_for_complete() { | |
33 | tracepoint(librbd, aio_wait_for_complete_enter, this); | |
34 | lock.Lock(); | |
35 | while (state != AIO_STATE_COMPLETE) | |
36 | cond.Wait(lock); | |
37 | lock.Unlock(); | |
38 | tracepoint(librbd, aio_wait_for_complete_exit, 0); | |
39 | return 0; | |
40 | } | |
41 | ||
42 | void AioCompletion::finalize(ssize_t rval) | |
43 | { | |
11fdf7f2 TL |
44 | ceph_assert(lock.is_locked()); |
45 | ceph_assert(ictx != nullptr); | |
7c673cae FG |
46 | CephContext *cct = ictx->cct; |
47 | ||
48 | ldout(cct, 20) << "r=" << rval << dendl; | |
49 | if (rval >= 0 && aio_type == AIO_TYPE_READ) { | |
50 | read_result.assemble_result(cct); | |
51 | } | |
52 | } | |
53 | ||
54 | void AioCompletion::complete() { | |
11fdf7f2 TL |
55 | ceph_assert(lock.is_locked()); |
56 | ceph_assert(ictx != nullptr); | |
7c673cae FG |
57 | CephContext *cct = ictx->cct; |
58 | ||
59 | tracepoint(librbd, aio_complete_enter, this, rval); | |
11fdf7f2 TL |
60 | if (ictx->perfcounter != nullptr) { |
61 | ceph::timespan elapsed = coarse_mono_clock::now() - start_time; | |
62 | switch (aio_type) { | |
63 | case AIO_TYPE_GENERIC: | |
64 | case AIO_TYPE_OPEN: | |
65 | case AIO_TYPE_CLOSE: | |
66 | break; | |
67 | case AIO_TYPE_READ: | |
68 | ictx->perfcounter->tinc(l_librbd_rd_latency, elapsed); break; | |
69 | case AIO_TYPE_WRITE: | |
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; | |
73 | case AIO_TYPE_FLUSH: | |
74 | ictx->perfcounter->tinc(l_librbd_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; | |
79 | default: | |
80 | lderr(cct) << "completed invalid aio_type: " << aio_type << dendl; | |
81 | break; | |
82 | } | |
7c673cae FG |
83 | } |
84 | ||
81eedcae TL |
85 | if ((aio_type == AIO_TYPE_CLOSE) || |
86 | (aio_type == AIO_TYPE_OPEN && rval < 0)) { | |
87 | // must destroy ImageCtx prior to invoking callback | |
88 | delete ictx; | |
89 | ictx = nullptr; | |
90 | } | |
91 | ||
7c673cae FG |
92 | state = AIO_STATE_CALLBACK; |
93 | if (complete_cb) { | |
94 | lock.Unlock(); | |
95 | complete_cb(rbd_comp, complete_arg); | |
96 | lock.Lock(); | |
97 | } | |
98 | ||
81eedcae | 99 | if (ictx != nullptr && event_notify && ictx->event_socket.is_valid()) { |
7c673cae FG |
100 | ictx->completed_reqs_lock.Lock(); |
101 | ictx->completed_reqs.push_back(&m_xlist_item); | |
102 | ictx->completed_reqs_lock.Unlock(); | |
103 | ictx->event_socket.notify(); | |
104 | } | |
105 | ||
106 | state = AIO_STATE_COMPLETE; | |
107 | cond.Signal(); | |
108 | ||
109 | // note: possible for image to be closed after op marked finished | |
110 | if (async_op.started()) { | |
111 | async_op.finish_op(); | |
112 | } | |
113 | tracepoint(librbd, aio_complete_exit); | |
114 | } | |
115 | ||
116 | void AioCompletion::init_time(ImageCtx *i, aio_type_t t) { | |
117 | Mutex::Locker locker(lock); | |
118 | if (ictx == nullptr) { | |
119 | ictx = i; | |
120 | aio_type = t; | |
11fdf7f2 | 121 | start_time = coarse_mono_clock::now(); |
7c673cae FG |
122 | } |
123 | } | |
124 | ||
494da23a | 125 | void AioCompletion::start_op() { |
7c673cae | 126 | Mutex::Locker locker(lock); |
11fdf7f2 | 127 | ceph_assert(ictx != nullptr); |
81eedcae TL |
128 | |
129 | if (aio_type == AIO_TYPE_OPEN || aio_type == AIO_TYPE_CLOSE) { | |
130 | // no need to track async open/close operations | |
131 | return; | |
132 | } | |
133 | ||
494da23a TL |
134 | ceph_assert(!async_op.started()); |
135 | async_op.start_op(*ictx); | |
7c673cae FG |
136 | } |
137 | ||
138 | void AioCompletion::fail(int r) | |
139 | { | |
140 | lock.Lock(); | |
11fdf7f2 | 141 | ceph_assert(ictx != nullptr); |
7c673cae FG |
142 | CephContext *cct = ictx->cct; |
143 | ||
144 | lderr(cct) << cpp_strerror(r) << dendl; | |
11fdf7f2 | 145 | ceph_assert(pending_count == 0); |
7c673cae FG |
146 | rval = r; |
147 | complete(); | |
148 | put_unlock(); | |
149 | } | |
150 | ||
151 | void AioCompletion::set_request_count(uint32_t count) { | |
152 | lock.Lock(); | |
11fdf7f2 | 153 | ceph_assert(ictx != nullptr); |
7c673cae FG |
154 | CephContext *cct = ictx->cct; |
155 | ||
156 | ldout(cct, 20) << "pending=" << count << dendl; | |
11fdf7f2 | 157 | ceph_assert(pending_count == 0); |
7c673cae | 158 | |
81eedcae TL |
159 | if (count > 0) { |
160 | pending_count = count; | |
161 | lock.Unlock(); | |
162 | } else { | |
163 | pending_count = 1; | |
164 | lock.Unlock(); | |
165 | ||
166 | // ensure completion fires in clean lock context | |
167 | ictx->op_work_queue->queue(new C_AioRequest(this), 0); | |
168 | } | |
7c673cae FG |
169 | } |
170 | ||
171 | void AioCompletion::complete_request(ssize_t r) | |
172 | { | |
173 | lock.Lock(); | |
11fdf7f2 | 174 | ceph_assert(ictx != nullptr); |
7c673cae FG |
175 | CephContext *cct = ictx->cct; |
176 | ||
177 | if (rval >= 0) { | |
178 | if (r < 0 && r != -EEXIST) | |
179 | rval = r; | |
180 | else if (r > 0) | |
181 | rval += r; | |
182 | } | |
11fdf7f2 | 183 | ceph_assert(pending_count); |
7c673cae FG |
184 | int count = --pending_count; |
185 | ||
186 | ldout(cct, 20) << "cb=" << complete_cb << ", " | |
187 | << "pending=" << pending_count << dendl; | |
81eedcae | 188 | if (!count) { |
7c673cae FG |
189 | finalize(rval); |
190 | complete(); | |
191 | } | |
192 | put_unlock(); | |
193 | } | |
194 | ||
7c673cae FG |
195 | bool AioCompletion::is_complete() { |
196 | tracepoint(librbd, aio_is_complete_enter, this); | |
197 | bool done; | |
198 | { | |
199 | Mutex::Locker l(lock); | |
200 | done = this->state == AIO_STATE_COMPLETE; | |
201 | } | |
202 | tracepoint(librbd, aio_is_complete_exit, done); | |
203 | return done; | |
204 | } | |
205 | ||
206 | ssize_t AioCompletion::get_return_value() { | |
207 | tracepoint(librbd, aio_get_return_value_enter, this); | |
208 | lock.Lock(); | |
209 | ssize_t r = rval; | |
210 | lock.Unlock(); | |
211 | tracepoint(librbd, aio_get_return_value_exit, r); | |
212 | return r; | |
213 | } | |
214 | ||
215 | } // namespace io | |
216 | } // namespace librbd |