Commit | Line | Data |
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f9009efa | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
18f473b3 | 2 | #include <linux/ceph/ceph_debug.h> |
f9009efa XL |
3 | |
4 | #include <linux/types.h> | |
5 | #include <linux/percpu_counter.h> | |
97e27aaa | 6 | #include <linux/math64.h> |
f9009efa XL |
7 | |
8 | #include "metric.h" | |
18f473b3 XL |
9 | #include "mds_client.h" |
10 | ||
8d728c76 VS |
11 | static void ktime_to_ceph_timespec(struct ceph_timespec *ts, ktime_t val) |
12 | { | |
13 | struct timespec64 t = ktime_to_timespec64(val); | |
14 | ceph_encode_timespec64(ts, &t); | |
15 | } | |
16 | ||
18f473b3 XL |
17 | static bool ceph_mdsc_send_metrics(struct ceph_mds_client *mdsc, |
18 | struct ceph_mds_session *s) | |
19 | { | |
20 | struct ceph_metric_head *head; | |
21 | struct ceph_metric_cap *cap; | |
22 | struct ceph_metric_read_latency *read; | |
23 | struct ceph_metric_write_latency *write; | |
24 | struct ceph_metric_metadata_latency *meta; | |
8ba3b8c7 | 25 | struct ceph_metric_dlease *dlease; |
3d8b6987 XL |
26 | struct ceph_opened_files *files; |
27 | struct ceph_pinned_icaps *icaps; | |
28 | struct ceph_opened_inodes *inodes; | |
903f4fec XL |
29 | struct ceph_read_io_size *rsize; |
30 | struct ceph_write_io_size *wsize; | |
18f473b3 XL |
31 | struct ceph_client_metric *m = &mdsc->metric; |
32 | u64 nr_caps = atomic64_read(&m->total_caps); | |
8ecd34c7 | 33 | u32 header_len = sizeof(struct ceph_metric_header); |
38d46409 | 34 | struct ceph_client *cl = mdsc->fsc->client; |
18f473b3 | 35 | struct ceph_msg *msg; |
18f473b3 XL |
36 | s64 sum; |
37 | s32 items = 0; | |
38 | s32 len; | |
39 | ||
f7c2f4f6 XL |
40 | /* Do not send the metrics until the MDS rank is ready */ |
41 | mutex_lock(&mdsc->mutex); | |
42 | if (ceph_mdsmap_get_state(mdsc->mdsmap, s->s_mds) != CEPH_MDS_STATE_ACTIVE) { | |
43 | mutex_unlock(&mdsc->mutex); | |
44 | return false; | |
45 | } | |
46 | mutex_unlock(&mdsc->mutex); | |
47 | ||
18f473b3 | 48 | len = sizeof(*head) + sizeof(*cap) + sizeof(*read) + sizeof(*write) |
3d8b6987 | 49 | + sizeof(*meta) + sizeof(*dlease) + sizeof(*files) |
903f4fec XL |
50 | + sizeof(*icaps) + sizeof(*inodes) + sizeof(*rsize) |
51 | + sizeof(*wsize); | |
18f473b3 XL |
52 | |
53 | msg = ceph_msg_new(CEPH_MSG_CLIENT_METRICS, len, GFP_NOFS, true); | |
54 | if (!msg) { | |
38d46409 XL |
55 | pr_err_client(cl, "to mds%d, failed to allocate message\n", |
56 | s->s_mds); | |
18f473b3 XL |
57 | return false; |
58 | } | |
59 | ||
60 | head = msg->front.iov_base; | |
61 | ||
62 | /* encode the cap metric */ | |
63 | cap = (struct ceph_metric_cap *)(head + 1); | |
8ecd34c7 XL |
64 | cap->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_CAP_INFO); |
65 | cap->header.ver = 1; | |
66 | cap->header.compat = 1; | |
67 | cap->header.data_len = cpu_to_le32(sizeof(*cap) - header_len); | |
8ba3b8c7 XL |
68 | cap->hit = cpu_to_le64(percpu_counter_sum(&m->i_caps_hit)); |
69 | cap->mis = cpu_to_le64(percpu_counter_sum(&m->i_caps_mis)); | |
18f473b3 XL |
70 | cap->total = cpu_to_le64(nr_caps); |
71 | items++; | |
72 | ||
73 | /* encode the read latency metric */ | |
74 | read = (struct ceph_metric_read_latency *)(cap + 1); | |
8ecd34c7 | 75 | read->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_READ_LATENCY); |
54d7b821 | 76 | read->header.ver = 2; |
8ecd34c7 XL |
77 | read->header.compat = 1; |
78 | read->header.data_len = cpu_to_le32(sizeof(*read) - header_len); | |
17e9fc9f | 79 | sum = m->metric[METRIC_READ].latency_sum; |
8d728c76 | 80 | ktime_to_ceph_timespec(&read->lat, sum); |
54d7b821 VS |
81 | ktime_to_ceph_timespec(&read->avg, m->metric[METRIC_READ].latency_avg); |
82 | read->sq_sum = cpu_to_le64(m->metric[METRIC_READ].latency_sq_sum); | |
83 | read->count = cpu_to_le64(m->metric[METRIC_READ].total); | |
18f473b3 XL |
84 | items++; |
85 | ||
86 | /* encode the write latency metric */ | |
87 | write = (struct ceph_metric_write_latency *)(read + 1); | |
8ecd34c7 | 88 | write->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_WRITE_LATENCY); |
54d7b821 | 89 | write->header.ver = 2; |
8ecd34c7 XL |
90 | write->header.compat = 1; |
91 | write->header.data_len = cpu_to_le32(sizeof(*write) - header_len); | |
17e9fc9f | 92 | sum = m->metric[METRIC_WRITE].latency_sum; |
8d728c76 | 93 | ktime_to_ceph_timespec(&write->lat, sum); |
54d7b821 VS |
94 | ktime_to_ceph_timespec(&write->avg, m->metric[METRIC_WRITE].latency_avg); |
95 | write->sq_sum = cpu_to_le64(m->metric[METRIC_WRITE].latency_sq_sum); | |
96 | write->count = cpu_to_le64(m->metric[METRIC_WRITE].total); | |
18f473b3 XL |
97 | items++; |
98 | ||
99 | /* encode the metadata latency metric */ | |
100 | meta = (struct ceph_metric_metadata_latency *)(write + 1); | |
8ecd34c7 | 101 | meta->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_METADATA_LATENCY); |
54d7b821 | 102 | meta->header.ver = 2; |
8ecd34c7 XL |
103 | meta->header.compat = 1; |
104 | meta->header.data_len = cpu_to_le32(sizeof(*meta) - header_len); | |
17e9fc9f | 105 | sum = m->metric[METRIC_METADATA].latency_sum; |
8d728c76 | 106 | ktime_to_ceph_timespec(&meta->lat, sum); |
54d7b821 VS |
107 | ktime_to_ceph_timespec(&meta->avg, m->metric[METRIC_METADATA].latency_avg); |
108 | meta->sq_sum = cpu_to_le64(m->metric[METRIC_METADATA].latency_sq_sum); | |
109 | meta->count = cpu_to_le64(m->metric[METRIC_METADATA].total); | |
18f473b3 XL |
110 | items++; |
111 | ||
8ba3b8c7 XL |
112 | /* encode the dentry lease metric */ |
113 | dlease = (struct ceph_metric_dlease *)(meta + 1); | |
8ecd34c7 XL |
114 | dlease->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_DENTRY_LEASE); |
115 | dlease->header.ver = 1; | |
116 | dlease->header.compat = 1; | |
117 | dlease->header.data_len = cpu_to_le32(sizeof(*dlease) - header_len); | |
8ba3b8c7 XL |
118 | dlease->hit = cpu_to_le64(percpu_counter_sum(&m->d_lease_hit)); |
119 | dlease->mis = cpu_to_le64(percpu_counter_sum(&m->d_lease_mis)); | |
120 | dlease->total = cpu_to_le64(atomic64_read(&m->total_dentries)); | |
121 | items++; | |
122 | ||
3d8b6987 XL |
123 | sum = percpu_counter_sum(&m->total_inodes); |
124 | ||
125 | /* encode the opened files metric */ | |
126 | files = (struct ceph_opened_files *)(dlease + 1); | |
8ecd34c7 XL |
127 | files->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_OPENED_FILES); |
128 | files->header.ver = 1; | |
129 | files->header.compat = 1; | |
130 | files->header.data_len = cpu_to_le32(sizeof(*files) - header_len); | |
3d8b6987 XL |
131 | files->opened_files = cpu_to_le64(atomic64_read(&m->opened_files)); |
132 | files->total = cpu_to_le64(sum); | |
133 | items++; | |
134 | ||
135 | /* encode the pinned icaps metric */ | |
136 | icaps = (struct ceph_pinned_icaps *)(files + 1); | |
8ecd34c7 XL |
137 | icaps->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_PINNED_ICAPS); |
138 | icaps->header.ver = 1; | |
139 | icaps->header.compat = 1; | |
140 | icaps->header.data_len = cpu_to_le32(sizeof(*icaps) - header_len); | |
3d8b6987 XL |
141 | icaps->pinned_icaps = cpu_to_le64(nr_caps); |
142 | icaps->total = cpu_to_le64(sum); | |
143 | items++; | |
144 | ||
145 | /* encode the opened inodes metric */ | |
146 | inodes = (struct ceph_opened_inodes *)(icaps + 1); | |
8ecd34c7 XL |
147 | inodes->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_OPENED_INODES); |
148 | inodes->header.ver = 1; | |
149 | inodes->header.compat = 1; | |
150 | inodes->header.data_len = cpu_to_le32(sizeof(*inodes) - header_len); | |
3d8b6987 XL |
151 | inodes->opened_inodes = cpu_to_le64(percpu_counter_sum(&m->opened_inodes)); |
152 | inodes->total = cpu_to_le64(sum); | |
153 | items++; | |
154 | ||
903f4fec XL |
155 | /* encode the read io size metric */ |
156 | rsize = (struct ceph_read_io_size *)(inodes + 1); | |
157 | rsize->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_READ_IO_SIZES); | |
158 | rsize->header.ver = 1; | |
159 | rsize->header.compat = 1; | |
160 | rsize->header.data_len = cpu_to_le32(sizeof(*rsize) - header_len); | |
17e9fc9f LH |
161 | rsize->total_ops = cpu_to_le64(m->metric[METRIC_READ].total); |
162 | rsize->total_size = cpu_to_le64(m->metric[METRIC_READ].size_sum); | |
903f4fec XL |
163 | items++; |
164 | ||
165 | /* encode the write io size metric */ | |
166 | wsize = (struct ceph_write_io_size *)(rsize + 1); | |
167 | wsize->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_WRITE_IO_SIZES); | |
168 | wsize->header.ver = 1; | |
169 | wsize->header.compat = 1; | |
170 | wsize->header.data_len = cpu_to_le32(sizeof(*wsize) - header_len); | |
17e9fc9f LH |
171 | wsize->total_ops = cpu_to_le64(m->metric[METRIC_WRITE].total); |
172 | wsize->total_size = cpu_to_le64(m->metric[METRIC_WRITE].size_sum); | |
903f4fec XL |
173 | items++; |
174 | ||
18f473b3 XL |
175 | put_unaligned_le32(items, &head->num); |
176 | msg->front.iov_len = len; | |
177 | msg->hdr.version = cpu_to_le16(1); | |
178 | msg->hdr.compat_version = cpu_to_le16(1); | |
179 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
18f473b3 XL |
180 | ceph_con_send(&s->s_con, msg); |
181 | ||
182 | return true; | |
183 | } | |
184 | ||
185 | ||
186 | static void metric_get_session(struct ceph_mds_client *mdsc) | |
187 | { | |
188 | struct ceph_mds_session *s; | |
189 | int i; | |
190 | ||
191 | mutex_lock(&mdsc->mutex); | |
192 | for (i = 0; i < mdsc->max_sessions; i++) { | |
193 | s = __ceph_lookup_mds_session(mdsc, i); | |
194 | if (!s) | |
195 | continue; | |
196 | ||
197 | /* | |
198 | * Skip it if MDS doesn't support the metric collection, | |
199 | * or the MDS will close the session's socket connection | |
200 | * directly when it get this message. | |
201 | */ | |
202 | if (check_session_state(s) && | |
203 | test_bit(CEPHFS_FEATURE_METRIC_COLLECT, &s->s_features)) { | |
204 | mdsc->metric.session = s; | |
205 | break; | |
206 | } | |
207 | ||
208 | ceph_put_mds_session(s); | |
209 | } | |
210 | mutex_unlock(&mdsc->mutex); | |
211 | } | |
212 | ||
213 | static void metric_delayed_work(struct work_struct *work) | |
214 | { | |
215 | struct ceph_client_metric *m = | |
216 | container_of(work, struct ceph_client_metric, delayed_work.work); | |
217 | struct ceph_mds_client *mdsc = | |
218 | container_of(m, struct ceph_mds_client, metric); | |
219 | ||
50164507 | 220 | if (mdsc->stopping || disable_send_metrics) |
18f473b3 XL |
221 | return; |
222 | ||
223 | if (!m->session || !check_session_state(m->session)) { | |
224 | if (m->session) { | |
225 | ceph_put_mds_session(m->session); | |
226 | m->session = NULL; | |
227 | } | |
228 | metric_get_session(mdsc); | |
229 | } | |
230 | if (m->session) { | |
231 | ceph_mdsc_send_metrics(mdsc, m->session); | |
232 | metric_schedule_delayed(m); | |
233 | } | |
234 | } | |
f9009efa XL |
235 | |
236 | int ceph_metric_init(struct ceph_client_metric *m) | |
237 | { | |
17e9fc9f LH |
238 | struct ceph_metric *metric; |
239 | int ret, i; | |
f9009efa XL |
240 | |
241 | if (!m) | |
242 | return -EINVAL; | |
243 | ||
244 | atomic64_set(&m->total_dentries, 0); | |
245 | ret = percpu_counter_init(&m->d_lease_hit, 0, GFP_KERNEL); | |
246 | if (ret) | |
247 | return ret; | |
1af16d54 | 248 | |
f9009efa | 249 | ret = percpu_counter_init(&m->d_lease_mis, 0, GFP_KERNEL); |
1af16d54 XL |
250 | if (ret) |
251 | goto err_d_lease_mis; | |
252 | ||
4f1d756d | 253 | atomic64_set(&m->total_caps, 0); |
1af16d54 XL |
254 | ret = percpu_counter_init(&m->i_caps_hit, 0, GFP_KERNEL); |
255 | if (ret) | |
256 | goto err_i_caps_hit; | |
257 | ||
258 | ret = percpu_counter_init(&m->i_caps_mis, 0, GFP_KERNEL); | |
259 | if (ret) | |
260 | goto err_i_caps_mis; | |
f9009efa | 261 | |
17e9fc9f LH |
262 | for (i = 0; i < METRIC_MAX; i++) { |
263 | metric = &m->metric[i]; | |
264 | spin_lock_init(&metric->lock); | |
265 | metric->size_sum = 0; | |
266 | metric->size_min = U64_MAX; | |
267 | metric->size_max = 0; | |
268 | metric->total = 0; | |
269 | metric->latency_sum = 0; | |
367290e6 | 270 | metric->latency_avg = 0; |
17e9fc9f LH |
271 | metric->latency_sq_sum = 0; |
272 | metric->latency_min = KTIME_MAX; | |
273 | metric->latency_max = 0; | |
274 | } | |
70c94820 | 275 | |
1dd8d470 XL |
276 | atomic64_set(&m->opened_files, 0); |
277 | ret = percpu_counter_init(&m->opened_inodes, 0, GFP_KERNEL); | |
278 | if (ret) | |
279 | goto err_opened_inodes; | |
280 | ret = percpu_counter_init(&m->total_inodes, 0, GFP_KERNEL); | |
281 | if (ret) | |
282 | goto err_total_inodes; | |
283 | ||
18f473b3 XL |
284 | m->session = NULL; |
285 | INIT_DELAYED_WORK(&m->delayed_work, metric_delayed_work); | |
286 | ||
f9009efa | 287 | return 0; |
1af16d54 | 288 | |
1dd8d470 XL |
289 | err_total_inodes: |
290 | percpu_counter_destroy(&m->opened_inodes); | |
291 | err_opened_inodes: | |
292 | percpu_counter_destroy(&m->i_caps_mis); | |
1af16d54 XL |
293 | err_i_caps_mis: |
294 | percpu_counter_destroy(&m->i_caps_hit); | |
295 | err_i_caps_hit: | |
296 | percpu_counter_destroy(&m->d_lease_mis); | |
297 | err_d_lease_mis: | |
298 | percpu_counter_destroy(&m->d_lease_hit); | |
299 | ||
300 | return ret; | |
f9009efa XL |
301 | } |
302 | ||
303 | void ceph_metric_destroy(struct ceph_client_metric *m) | |
304 | { | |
305 | if (!m) | |
306 | return; | |
307 | ||
b4002173 JL |
308 | cancel_delayed_work_sync(&m->delayed_work); |
309 | ||
1dd8d470 XL |
310 | percpu_counter_destroy(&m->total_inodes); |
311 | percpu_counter_destroy(&m->opened_inodes); | |
1af16d54 XL |
312 | percpu_counter_destroy(&m->i_caps_mis); |
313 | percpu_counter_destroy(&m->i_caps_hit); | |
f9009efa XL |
314 | percpu_counter_destroy(&m->d_lease_mis); |
315 | percpu_counter_destroy(&m->d_lease_hit); | |
18f473b3 | 316 | |
7e65624d | 317 | ceph_put_mds_session(m->session); |
f9009efa | 318 | } |
97e27aaa | 319 | |
fc123d5f XL |
320 | #define METRIC_UPDATE_MIN_MAX(min, max, new) \ |
321 | { \ | |
322 | if (unlikely(new < min)) \ | |
323 | min = new; \ | |
324 | if (unlikely(new > max)) \ | |
325 | max = new; \ | |
326 | } | |
97e27aaa | 327 | |
367290e6 VS |
328 | static inline void __update_mean_and_stdev(ktime_t total, ktime_t *lavg, |
329 | ktime_t *sq_sump, ktime_t lat) | |
fc123d5f | 330 | { |
367290e6 VS |
331 | ktime_t avg; |
332 | ||
333 | if (unlikely(total == 1)) { | |
334 | *lavg = lat; | |
335 | } else { | |
336 | /* the sq is (lat - old_avg) * (lat - new_avg) */ | |
337 | avg = *lavg + div64_s64(lat - *lavg, total); | |
338 | *sq_sump += (lat - *lavg)*(lat - avg); | |
339 | *lavg = avg; | |
340 | } | |
97e27aaa XL |
341 | } |
342 | ||
17e9fc9f LH |
343 | void ceph_update_metrics(struct ceph_metric *m, |
344 | ktime_t r_start, ktime_t r_end, | |
345 | unsigned int size, int rc) | |
97e27aaa XL |
346 | { |
347 | ktime_t lat = ktime_sub(r_end, r_start); | |
fc123d5f | 348 | ktime_t total; |
97e27aaa XL |
349 | |
350 | if (unlikely(rc < 0 && rc != -ENOENT && rc != -ETIMEDOUT)) | |
351 | return; | |
352 | ||
17e9fc9f LH |
353 | spin_lock(&m->lock); |
354 | total = ++m->total; | |
355 | m->size_sum += size; | |
356 | METRIC_UPDATE_MIN_MAX(m->size_min, m->size_max, size); | |
357 | m->latency_sum += lat; | |
358 | METRIC_UPDATE_MIN_MAX(m->latency_min, m->latency_max, lat); | |
367290e6 VS |
359 | __update_mean_and_stdev(total, &m->latency_avg, &m->latency_sq_sum, |
360 | lat); | |
17e9fc9f | 361 | spin_unlock(&m->lock); |
70c94820 | 362 | } |