1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
3
4 #include <linux/device.h>
5 #include <linux/slab.h>
6 #include <linux/module.h>
7 #include <linux/ctype.h>
8 #include <linux/debugfs.h>
9 #include <linux/seq_file.h>
10 #include <linux/math64.h>
11 #include <linux/ktime.h>
12
13 #include <linux/ceph/libceph.h>
14 #include <linux/ceph/mon_client.h>
15 #include <linux/ceph/auth.h>
16 #include <linux/ceph/debugfs.h>
17
18 #include "super.h"
19
20 #ifdef CONFIG_DEBUG_FS
21
22 #include "mds_client.h"
23 #include "metric.h"
24
mdsmap_show(struct seq_file * s,void * p)25 static int mdsmap_show(struct seq_file *s, void *p)
26 {
27 int i;
28 struct ceph_fs_client *fsc = s->private;
29 struct ceph_mdsmap *mdsmap;
30
31 if (!fsc->mdsc || !fsc->mdsc->mdsmap)
32 return 0;
33 mdsmap = fsc->mdsc->mdsmap;
34 seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
35 seq_printf(s, "root %d\n", mdsmap->m_root);
36 seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
37 seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
38 seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
39 for (i = 0; i < mdsmap->possible_max_rank; i++) {
40 struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
41 int state = mdsmap->m_info[i].state;
42 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
43 ceph_pr_addr(addr),
44 ceph_mds_state_name(state));
45 }
46 return 0;
47 }
48
49 /*
50 * mdsc debugfs
51 */
mdsc_show(struct seq_file * s,void * p)52 static int mdsc_show(struct seq_file *s, void *p)
53 {
54 struct ceph_fs_client *fsc = s->private;
55 struct ceph_mds_client *mdsc = fsc->mdsc;
56 struct ceph_mds_request *req;
57 struct rb_node *rp;
58 int pathlen = 0;
59 u64 pathbase;
60 char *path;
61
62 mutex_lock(&mdsc->mutex);
63 for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
64 req = rb_entry(rp, struct ceph_mds_request, r_node);
65
66 if (req->r_request && req->r_session)
67 seq_printf(s, "%lld\tmds%d\t", req->r_tid,
68 req->r_session->s_mds);
69 else if (!req->r_request)
70 seq_printf(s, "%lld\t(no request)\t", req->r_tid);
71 else
72 seq_printf(s, "%lld\t(no session)\t", req->r_tid);
73
74 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
75
76 if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
77 seq_puts(s, "\t(unsafe)");
78 else
79 seq_puts(s, "\t");
80
81 if (req->r_inode) {
82 seq_printf(s, " #%llx", ceph_ino(req->r_inode));
83 } else if (req->r_dentry) {
84 path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
85 &pathbase, 0);
86 if (IS_ERR(path))
87 path = NULL;
88 spin_lock(&req->r_dentry->d_lock);
89 seq_printf(s, " #%llx/%pd (%s)",
90 ceph_ino(d_inode(req->r_dentry->d_parent)),
91 req->r_dentry,
92 path ? path : "");
93 spin_unlock(&req->r_dentry->d_lock);
94 ceph_mdsc_free_path(path, pathlen);
95 } else if (req->r_path1) {
96 seq_printf(s, " #%llx/%s", req->r_ino1.ino,
97 req->r_path1);
98 } else {
99 seq_printf(s, " #%llx", req->r_ino1.ino);
100 }
101
102 if (req->r_old_dentry) {
103 path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
104 &pathbase, 0);
105 if (IS_ERR(path))
106 path = NULL;
107 spin_lock(&req->r_old_dentry->d_lock);
108 seq_printf(s, " #%llx/%pd (%s)",
109 req->r_old_dentry_dir ?
110 ceph_ino(req->r_old_dentry_dir) : 0,
111 req->r_old_dentry,
112 path ? path : "");
113 spin_unlock(&req->r_old_dentry->d_lock);
114 ceph_mdsc_free_path(path, pathlen);
115 } else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
116 if (req->r_ino2.ino)
117 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
118 req->r_path2);
119 else
120 seq_printf(s, " %s", req->r_path2);
121 }
122
123 seq_puts(s, "\n");
124 }
125 mutex_unlock(&mdsc->mutex);
126
127 return 0;
128 }
129
130 #define CEPH_LAT_METRIC_SHOW(name, total, avg, min, max, sq) { \
131 s64 _total, _avg, _min, _max, _sq, _st; \
132 _avg = ktime_to_us(avg); \
133 _min = ktime_to_us(min == KTIME_MAX ? 0 : min); \
134 _max = ktime_to_us(max); \
135 _total = total - 1; \
136 _sq = _total > 0 ? DIV64_U64_ROUND_CLOSEST(sq, _total) : 0; \
137 _st = int_sqrt64(_sq); \
138 _st = ktime_to_us(_st); \
139 seq_printf(s, "%-14s%-12lld%-16lld%-16lld%-16lld%lld\n", \
140 name, total, _avg, _min, _max, _st); \
141 }
142
143 #define CEPH_SZ_METRIC_SHOW(name, total, avg, min, max, sum) { \
144 u64 _min = min == U64_MAX ? 0 : min; \
145 seq_printf(s, "%-14s%-12lld%-16llu%-16llu%-16llu%llu\n", \
146 name, total, avg, _min, max, sum); \
147 }
148
metrics_file_show(struct seq_file * s,void * p)149 static int metrics_file_show(struct seq_file *s, void *p)
150 {
151 struct ceph_fs_client *fsc = s->private;
152 struct ceph_client_metric *m = &fsc->mdsc->metric;
153
154 seq_printf(s, "item total\n");
155 seq_printf(s, "------------------------------------------\n");
156 seq_printf(s, "%-35s%lld\n", "total inodes",
157 percpu_counter_sum(&m->total_inodes));
158 seq_printf(s, "%-35s%lld\n", "opened files",
159 atomic64_read(&m->opened_files));
160 seq_printf(s, "%-35s%lld\n", "pinned i_caps",
161 atomic64_read(&m->total_caps));
162 seq_printf(s, "%-35s%lld\n", "opened inodes",
163 percpu_counter_sum(&m->opened_inodes));
164 return 0;
165 }
166
167 static const char * const metric_str[] = {
168 "read",
169 "write",
170 "metadata",
171 "copyfrom"
172 };
metrics_latency_show(struct seq_file * s,void * p)173 static int metrics_latency_show(struct seq_file *s, void *p)
174 {
175 struct ceph_fs_client *fsc = s->private;
176 struct ceph_client_metric *cm = &fsc->mdsc->metric;
177 struct ceph_metric *m;
178 s64 total, avg, min, max, sq;
179 int i;
180
181 seq_printf(s, "item total avg_lat(us) min_lat(us) max_lat(us) stdev(us)\n");
182 seq_printf(s, "-----------------------------------------------------------------------------------\n");
183
184 for (i = 0; i < METRIC_MAX; i++) {
185 m = &cm->metric[i];
186 spin_lock(&m->lock);
187 total = m->total;
188 avg = m->latency_avg;
189 min = m->latency_min;
190 max = m->latency_max;
191 sq = m->latency_sq_sum;
192 spin_unlock(&m->lock);
193 CEPH_LAT_METRIC_SHOW(metric_str[i], total, avg, min, max, sq);
194 }
195
196 return 0;
197 }
198
metrics_size_show(struct seq_file * s,void * p)199 static int metrics_size_show(struct seq_file *s, void *p)
200 {
201 struct ceph_fs_client *fsc = s->private;
202 struct ceph_client_metric *cm = &fsc->mdsc->metric;
203 struct ceph_metric *m;
204 s64 total;
205 u64 sum, avg, min, max;
206 int i;
207
208 seq_printf(s, "item total avg_sz(bytes) min_sz(bytes) max_sz(bytes) total_sz(bytes)\n");
209 seq_printf(s, "----------------------------------------------------------------------------------------\n");
210
211 for (i = 0; i < METRIC_MAX; i++) {
212 /* skip 'metadata' as it doesn't use the size metric */
213 if (i == METRIC_METADATA)
214 continue;
215 m = &cm->metric[i];
216 spin_lock(&m->lock);
217 total = m->total;
218 sum = m->size_sum;
219 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
220 min = m->size_min;
221 max = m->size_max;
222 spin_unlock(&m->lock);
223 CEPH_SZ_METRIC_SHOW(metric_str[i], total, avg, min, max, sum);
224 }
225
226 return 0;
227 }
228
metrics_caps_show(struct seq_file * s,void * p)229 static int metrics_caps_show(struct seq_file *s, void *p)
230 {
231 struct ceph_fs_client *fsc = s->private;
232 struct ceph_client_metric *m = &fsc->mdsc->metric;
233 int nr_caps = 0;
234
235 seq_printf(s, "item total miss hit\n");
236 seq_printf(s, "-------------------------------------------------\n");
237
238 seq_printf(s, "%-14s%-16lld%-16lld%lld\n", "d_lease",
239 atomic64_read(&m->total_dentries),
240 percpu_counter_sum(&m->d_lease_mis),
241 percpu_counter_sum(&m->d_lease_hit));
242
243 nr_caps = atomic64_read(&m->total_caps);
244 seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps,
245 percpu_counter_sum(&m->i_caps_mis),
246 percpu_counter_sum(&m->i_caps_hit));
247
248 return 0;
249 }
250
caps_show_cb(struct inode * inode,struct ceph_cap * cap,void * p)251 static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
252 {
253 struct seq_file *s = p;
254
255 seq_printf(s, "0x%-17llx%-3d%-17s%-17s\n", ceph_ino(inode),
256 cap->session->s_mds,
257 ceph_cap_string(cap->issued),
258 ceph_cap_string(cap->implemented));
259 return 0;
260 }
261
caps_show(struct seq_file * s,void * p)262 static int caps_show(struct seq_file *s, void *p)
263 {
264 struct ceph_fs_client *fsc = s->private;
265 struct ceph_mds_client *mdsc = fsc->mdsc;
266 int total, avail, used, reserved, min, i;
267 struct cap_wait *cw;
268
269 ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
270 seq_printf(s, "total\t\t%d\n"
271 "avail\t\t%d\n"
272 "used\t\t%d\n"
273 "reserved\t%d\n"
274 "min\t\t%d\n\n",
275 total, avail, used, reserved, min);
276 seq_printf(s, "ino mds issued implemented\n");
277 seq_printf(s, "--------------------------------------------------\n");
278
279 mutex_lock(&mdsc->mutex);
280 for (i = 0; i < mdsc->max_sessions; i++) {
281 struct ceph_mds_session *session;
282
283 session = __ceph_lookup_mds_session(mdsc, i);
284 if (!session)
285 continue;
286 mutex_unlock(&mdsc->mutex);
287 mutex_lock(&session->s_mutex);
288 ceph_iterate_session_caps(session, caps_show_cb, s);
289 mutex_unlock(&session->s_mutex);
290 ceph_put_mds_session(session);
291 mutex_lock(&mdsc->mutex);
292 }
293 mutex_unlock(&mdsc->mutex);
294
295 seq_printf(s, "\n\nWaiters:\n--------\n");
296 seq_printf(s, "tgid ino need want\n");
297 seq_printf(s, "-----------------------------------------------------\n");
298
299 spin_lock(&mdsc->caps_list_lock);
300 list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
301 seq_printf(s, "%-13d0x%-17llx%-17s%-17s\n", cw->tgid, cw->ino,
302 ceph_cap_string(cw->need),
303 ceph_cap_string(cw->want));
304 }
305 spin_unlock(&mdsc->caps_list_lock);
306
307 return 0;
308 }
309
mds_sessions_show(struct seq_file * s,void * ptr)310 static int mds_sessions_show(struct seq_file *s, void *ptr)
311 {
312 struct ceph_fs_client *fsc = s->private;
313 struct ceph_mds_client *mdsc = fsc->mdsc;
314 struct ceph_auth_client *ac = fsc->client->monc.auth;
315 struct ceph_options *opt = fsc->client->options;
316 int mds;
317
318 mutex_lock(&mdsc->mutex);
319
320 /* The 'num' portion of an 'entity name' */
321 seq_printf(s, "global_id %llu\n", ac->global_id);
322
323 /* The -o name mount argument */
324 seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
325
326 /* The list of MDS session rank+state */
327 for (mds = 0; mds < mdsc->max_sessions; mds++) {
328 struct ceph_mds_session *session =
329 __ceph_lookup_mds_session(mdsc, mds);
330 if (!session) {
331 continue;
332 }
333 mutex_unlock(&mdsc->mutex);
334 seq_printf(s, "mds.%d %s\n",
335 session->s_mds,
336 ceph_session_state_name(session->s_state));
337
338 ceph_put_mds_session(session);
339 mutex_lock(&mdsc->mutex);
340 }
341 mutex_unlock(&mdsc->mutex);
342
343 return 0;
344 }
345
status_show(struct seq_file * s,void * p)346 static int status_show(struct seq_file *s, void *p)
347 {
348 struct ceph_fs_client *fsc = s->private;
349 struct ceph_entity_inst *inst = &fsc->client->msgr.inst;
350 struct ceph_entity_addr *client_addr = ceph_client_addr(fsc->client);
351
352 seq_printf(s, "instance: %s.%lld %s/%u\n", ENTITY_NAME(inst->name),
353 ceph_pr_addr(client_addr), le32_to_cpu(client_addr->nonce));
354 seq_printf(s, "blocklisted: %s\n", fsc->blocklisted ? "true" : "false");
355
356 return 0;
357 }
358
359 DEFINE_SHOW_ATTRIBUTE(mdsmap);
360 DEFINE_SHOW_ATTRIBUTE(mdsc);
361 DEFINE_SHOW_ATTRIBUTE(caps);
362 DEFINE_SHOW_ATTRIBUTE(mds_sessions);
363 DEFINE_SHOW_ATTRIBUTE(status);
364 DEFINE_SHOW_ATTRIBUTE(metrics_file);
365 DEFINE_SHOW_ATTRIBUTE(metrics_latency);
366 DEFINE_SHOW_ATTRIBUTE(metrics_size);
367 DEFINE_SHOW_ATTRIBUTE(metrics_caps);
368
369
370 /*
371 * debugfs
372 */
congestion_kb_set(void * data,u64 val)373 static int congestion_kb_set(void *data, u64 val)
374 {
375 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
376
377 fsc->mount_options->congestion_kb = (int)val;
378 return 0;
379 }
380
congestion_kb_get(void * data,u64 * val)381 static int congestion_kb_get(void *data, u64 *val)
382 {
383 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
384
385 *val = (u64)fsc->mount_options->congestion_kb;
386 return 0;
387 }
388
389 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
390 congestion_kb_set, "%llu\n");
391
392
ceph_fs_debugfs_cleanup(struct ceph_fs_client * fsc)393 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
394 {
395 dout("ceph_fs_debugfs_cleanup\n");
396 debugfs_remove(fsc->debugfs_bdi);
397 debugfs_remove(fsc->debugfs_congestion_kb);
398 debugfs_remove(fsc->debugfs_mdsmap);
399 debugfs_remove(fsc->debugfs_mds_sessions);
400 debugfs_remove(fsc->debugfs_caps);
401 debugfs_remove(fsc->debugfs_status);
402 debugfs_remove(fsc->debugfs_mdsc);
403 debugfs_remove_recursive(fsc->debugfs_metrics_dir);
404 }
405
ceph_fs_debugfs_init(struct ceph_fs_client * fsc)406 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
407 {
408 char name[100];
409
410 dout("ceph_fs_debugfs_init\n");
411 fsc->debugfs_congestion_kb =
412 debugfs_create_file("writeback_congestion_kb",
413 0600,
414 fsc->client->debugfs_dir,
415 fsc,
416 &congestion_kb_fops);
417
418 snprintf(name, sizeof(name), "../../bdi/%s",
419 bdi_dev_name(fsc->sb->s_bdi));
420 fsc->debugfs_bdi =
421 debugfs_create_symlink("bdi",
422 fsc->client->debugfs_dir,
423 name);
424
425 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
426 0400,
427 fsc->client->debugfs_dir,
428 fsc,
429 &mdsmap_fops);
430
431 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
432 0400,
433 fsc->client->debugfs_dir,
434 fsc,
435 &mds_sessions_fops);
436
437 fsc->debugfs_mdsc = debugfs_create_file("mdsc",
438 0400,
439 fsc->client->debugfs_dir,
440 fsc,
441 &mdsc_fops);
442
443 fsc->debugfs_caps = debugfs_create_file("caps",
444 0400,
445 fsc->client->debugfs_dir,
446 fsc,
447 &caps_fops);
448
449 fsc->debugfs_status = debugfs_create_file("status",
450 0400,
451 fsc->client->debugfs_dir,
452 fsc,
453 &status_fops);
454
455 fsc->debugfs_metrics_dir = debugfs_create_dir("metrics",
456 fsc->client->debugfs_dir);
457
458 debugfs_create_file("file", 0400, fsc->debugfs_metrics_dir, fsc,
459 &metrics_file_fops);
460 debugfs_create_file("latency", 0400, fsc->debugfs_metrics_dir, fsc,
461 &metrics_latency_fops);
462 debugfs_create_file("size", 0400, fsc->debugfs_metrics_dir, fsc,
463 &metrics_size_fops);
464 debugfs_create_file("caps", 0400, fsc->debugfs_metrics_dir, fsc,
465 &metrics_caps_fops);
466 }
467
468
469 #else /* CONFIG_DEBUG_FS */
470
ceph_fs_debugfs_init(struct ceph_fs_client * fsc)471 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
472 {
473 }
474
ceph_fs_debugfs_cleanup(struct ceph_fs_client * fsc)475 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
476 {
477 }
478
479 #endif /* CONFIG_DEBUG_FS */
480