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
11 #include <linux/ceph/libceph.h>
12 #include <linux/ceph/mon_client.h>
13 #include <linux/ceph/auth.h>
14 #include <linux/ceph/debugfs.h>
15
16 #ifdef CONFIG_DEBUG_FS
17
18 /*
19 * Implement /sys/kernel/debug/ceph fun
20 *
21 * /sys/kernel/debug/ceph/client* - an instance of the ceph client
22 * .../osdmap - current osdmap
23 * .../monmap - current monmap
24 * .../osdc - active osd requests
25 * .../monc - mon client state
26 * .../client_options - libceph-only (i.e. not rbd or cephfs) options
27 * .../dentry_lru - dump contents of dentry lru
28 * .../caps - expose cap (reservation) stats
29 * .../bdi - symlink to ../../bdi/something
30 */
31
32 static struct dentry *ceph_debugfs_dir;
33
monmap_show(struct seq_file * s,void * p)34 static int monmap_show(struct seq_file *s, void *p)
35 {
36 int i;
37 struct ceph_client *client = s->private;
38
39 if (client->monc.monmap == NULL)
40 return 0;
41
42 seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
43 for (i = 0; i < client->monc.monmap->num_mon; i++) {
44 struct ceph_entity_inst *inst =
45 &client->monc.monmap->mon_inst[i];
46
47 seq_printf(s, "\t%s%lld\t%s\n",
48 ENTITY_NAME(inst->name),
49 ceph_pr_addr(&inst->addr));
50 }
51 return 0;
52 }
53
osdmap_show(struct seq_file * s,void * p)54 static int osdmap_show(struct seq_file *s, void *p)
55 {
56 int i;
57 struct ceph_client *client = s->private;
58 struct ceph_osd_client *osdc = &client->osdc;
59 struct ceph_osdmap *map = osdc->osdmap;
60 struct rb_node *n;
61
62 if (map == NULL)
63 return 0;
64
65 down_read(&osdc->lock);
66 seq_printf(s, "epoch %u barrier %u flags 0x%x\n", map->epoch,
67 osdc->epoch_barrier, map->flags);
68
69 for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
70 struct ceph_pg_pool_info *pi =
71 rb_entry(n, struct ceph_pg_pool_info, node);
72
73 seq_printf(s, "pool %lld '%s' type %d size %d min_size %d pg_num %u pg_num_mask %d flags 0x%llx lfor %u read_tier %lld write_tier %lld\n",
74 pi->id, pi->name, pi->type, pi->size, pi->min_size,
75 pi->pg_num, pi->pg_num_mask, pi->flags,
76 pi->last_force_request_resend, pi->read_tier,
77 pi->write_tier);
78 }
79 for (i = 0; i < map->max_osd; i++) {
80 struct ceph_entity_addr *addr = &map->osd_addr[i];
81 u32 state = map->osd_state[i];
82 char sb[64];
83
84 seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\t%2d\n",
85 i, ceph_pr_addr(addr),
86 ((map->osd_weight[i]*100) >> 16),
87 ceph_osdmap_state_str(sb, sizeof(sb), state),
88 ((ceph_get_primary_affinity(map, i)*100) >> 16),
89 ceph_get_crush_locality(map, i,
90 &client->options->crush_locs));
91 }
92 for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
93 struct ceph_pg_mapping *pg =
94 rb_entry(n, struct ceph_pg_mapping, node);
95
96 seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,
97 pg->pgid.seed);
98 for (i = 0; i < pg->pg_temp.len; i++)
99 seq_printf(s, "%s%d", (i == 0 ? "" : ","),
100 pg->pg_temp.osds[i]);
101 seq_printf(s, "]\n");
102 }
103 for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {
104 struct ceph_pg_mapping *pg =
105 rb_entry(n, struct ceph_pg_mapping, node);
106
107 seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,
108 pg->pgid.seed, pg->primary_temp.osd);
109 }
110 for (n = rb_first(&map->pg_upmap); n; n = rb_next(n)) {
111 struct ceph_pg_mapping *pg =
112 rb_entry(n, struct ceph_pg_mapping, node);
113
114 seq_printf(s, "pg_upmap %llu.%x [", pg->pgid.pool,
115 pg->pgid.seed);
116 for (i = 0; i < pg->pg_upmap.len; i++)
117 seq_printf(s, "%s%d", (i == 0 ? "" : ","),
118 pg->pg_upmap.osds[i]);
119 seq_printf(s, "]\n");
120 }
121 for (n = rb_first(&map->pg_upmap_items); n; n = rb_next(n)) {
122 struct ceph_pg_mapping *pg =
123 rb_entry(n, struct ceph_pg_mapping, node);
124
125 seq_printf(s, "pg_upmap_items %llu.%x [", pg->pgid.pool,
126 pg->pgid.seed);
127 for (i = 0; i < pg->pg_upmap_items.len; i++)
128 seq_printf(s, "%s%d->%d", (i == 0 ? "" : ","),
129 pg->pg_upmap_items.from_to[i][0],
130 pg->pg_upmap_items.from_to[i][1]);
131 seq_printf(s, "]\n");
132 }
133
134 up_read(&osdc->lock);
135 return 0;
136 }
137
monc_show(struct seq_file * s,void * p)138 static int monc_show(struct seq_file *s, void *p)
139 {
140 struct ceph_client *client = s->private;
141 struct ceph_mon_generic_request *req;
142 struct ceph_mon_client *monc = &client->monc;
143 struct rb_node *rp;
144 int i;
145
146 mutex_lock(&monc->mutex);
147
148 for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {
149 seq_printf(s, "have %s %u", ceph_sub_str[i],
150 monc->subs[i].have);
151 if (monc->subs[i].want)
152 seq_printf(s, " want %llu%s",
153 le64_to_cpu(monc->subs[i].item.start),
154 (monc->subs[i].item.flags &
155 CEPH_SUBSCRIBE_ONETIME ? "" : "+"));
156 seq_putc(s, '\n');
157 }
158 seq_printf(s, "fs_cluster_id %d\n", monc->fs_cluster_id);
159
160 for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
161 __u16 op;
162 req = rb_entry(rp, struct ceph_mon_generic_request, node);
163 op = le16_to_cpu(req->request->hdr.type);
164 if (op == CEPH_MSG_STATFS)
165 seq_printf(s, "%llu statfs\n", req->tid);
166 else if (op == CEPH_MSG_MON_GET_VERSION)
167 seq_printf(s, "%llu mon_get_version", req->tid);
168 else
169 seq_printf(s, "%llu unknown\n", req->tid);
170 }
171
172 mutex_unlock(&monc->mutex);
173 return 0;
174 }
175
dump_spgid(struct seq_file * s,const struct ceph_spg * spgid)176 static void dump_spgid(struct seq_file *s, const struct ceph_spg *spgid)
177 {
178 seq_printf(s, "%llu.%x", spgid->pgid.pool, spgid->pgid.seed);
179 if (spgid->shard != CEPH_SPG_NOSHARD)
180 seq_printf(s, "s%d", spgid->shard);
181 }
182
dump_target(struct seq_file * s,struct ceph_osd_request_target * t)183 static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t)
184 {
185 int i;
186
187 seq_printf(s, "osd%d\t%llu.%x\t", t->osd, t->pgid.pool, t->pgid.seed);
188 dump_spgid(s, &t->spgid);
189 seq_puts(s, "\t[");
190 for (i = 0; i < t->up.size; i++)
191 seq_printf(s, "%s%d", (!i ? "" : ","), t->up.osds[i]);
192 seq_printf(s, "]/%d\t[", t->up.primary);
193 for (i = 0; i < t->acting.size; i++)
194 seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);
195 seq_printf(s, "]/%d\te%u\t", t->acting.primary, t->epoch);
196 if (t->target_oloc.pool_ns) {
197 seq_printf(s, "%*pE/%*pE\t0x%x",
198 (int)t->target_oloc.pool_ns->len,
199 t->target_oloc.pool_ns->str,
200 t->target_oid.name_len, t->target_oid.name, t->flags);
201 } else {
202 seq_printf(s, "%*pE\t0x%x", t->target_oid.name_len,
203 t->target_oid.name, t->flags);
204 }
205 if (t->paused)
206 seq_puts(s, "\tP");
207 }
208
dump_request(struct seq_file * s,struct ceph_osd_request * req)209 static void dump_request(struct seq_file *s, struct ceph_osd_request *req)
210 {
211 int i;
212
213 seq_printf(s, "%llu\t", req->r_tid);
214 dump_target(s, &req->r_t);
215
216 seq_printf(s, "\t%d", req->r_attempts);
217
218 for (i = 0; i < req->r_num_ops; i++) {
219 struct ceph_osd_req_op *op = &req->r_ops[i];
220
221 seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),
222 ceph_osd_op_name(op->op));
223 if (op->op == CEPH_OSD_OP_WATCH)
224 seq_printf(s, "-%s",
225 ceph_osd_watch_op_name(op->watch.op));
226 else if (op->op == CEPH_OSD_OP_CALL)
227 seq_printf(s, "-%s/%s", op->cls.class_name,
228 op->cls.method_name);
229 }
230
231 seq_putc(s, '\n');
232 }
233
dump_requests(struct seq_file * s,struct ceph_osd * osd)234 static void dump_requests(struct seq_file *s, struct ceph_osd *osd)
235 {
236 struct rb_node *n;
237
238 mutex_lock(&osd->lock);
239 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
240 struct ceph_osd_request *req =
241 rb_entry(n, struct ceph_osd_request, r_node);
242
243 dump_request(s, req);
244 }
245
246 mutex_unlock(&osd->lock);
247 }
248
dump_linger_request(struct seq_file * s,struct ceph_osd_linger_request * lreq)249 static void dump_linger_request(struct seq_file *s,
250 struct ceph_osd_linger_request *lreq)
251 {
252 seq_printf(s, "%llu\t", lreq->linger_id);
253 dump_target(s, &lreq->t);
254
255 seq_printf(s, "\t%u\t%s%s/%d\n", lreq->register_gen,
256 lreq->is_watch ? "W" : "N", lreq->committed ? "C" : "",
257 lreq->last_error);
258 }
259
dump_linger_requests(struct seq_file * s,struct ceph_osd * osd)260 static void dump_linger_requests(struct seq_file *s, struct ceph_osd *osd)
261 {
262 struct rb_node *n;
263
264 mutex_lock(&osd->lock);
265 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
266 struct ceph_osd_linger_request *lreq =
267 rb_entry(n, struct ceph_osd_linger_request, node);
268
269 dump_linger_request(s, lreq);
270 }
271
272 mutex_unlock(&osd->lock);
273 }
274
dump_snapid(struct seq_file * s,u64 snapid)275 static void dump_snapid(struct seq_file *s, u64 snapid)
276 {
277 if (snapid == CEPH_NOSNAP)
278 seq_puts(s, "head");
279 else if (snapid == CEPH_SNAPDIR)
280 seq_puts(s, "snapdir");
281 else
282 seq_printf(s, "%llx", snapid);
283 }
284
dump_name_escaped(struct seq_file * s,unsigned char * name,size_t len)285 static void dump_name_escaped(struct seq_file *s, unsigned char *name,
286 size_t len)
287 {
288 size_t i;
289
290 for (i = 0; i < len; i++) {
291 if (name[i] == '%' || name[i] == ':' || name[i] == '/' ||
292 name[i] < 32 || name[i] >= 127) {
293 seq_printf(s, "%%%02x", name[i]);
294 } else {
295 seq_putc(s, name[i]);
296 }
297 }
298 }
299
dump_hoid(struct seq_file * s,const struct ceph_hobject_id * hoid)300 static void dump_hoid(struct seq_file *s, const struct ceph_hobject_id *hoid)
301 {
302 if (hoid->snapid == 0 && hoid->hash == 0 && !hoid->is_max &&
303 hoid->pool == S64_MIN) {
304 seq_puts(s, "MIN");
305 return;
306 }
307 if (hoid->is_max) {
308 seq_puts(s, "MAX");
309 return;
310 }
311 seq_printf(s, "%lld:%08x:", hoid->pool, hoid->hash_reverse_bits);
312 dump_name_escaped(s, hoid->nspace, hoid->nspace_len);
313 seq_putc(s, ':');
314 dump_name_escaped(s, hoid->key, hoid->key_len);
315 seq_putc(s, ':');
316 dump_name_escaped(s, hoid->oid, hoid->oid_len);
317 seq_putc(s, ':');
318 dump_snapid(s, hoid->snapid);
319 }
320
dump_backoffs(struct seq_file * s,struct ceph_osd * osd)321 static void dump_backoffs(struct seq_file *s, struct ceph_osd *osd)
322 {
323 struct rb_node *n;
324
325 mutex_lock(&osd->lock);
326 for (n = rb_first(&osd->o_backoffs_by_id); n; n = rb_next(n)) {
327 struct ceph_osd_backoff *backoff =
328 rb_entry(n, struct ceph_osd_backoff, id_node);
329
330 seq_printf(s, "osd%d\t", osd->o_osd);
331 dump_spgid(s, &backoff->spgid);
332 seq_printf(s, "\t%llu\t", backoff->id);
333 dump_hoid(s, backoff->begin);
334 seq_putc(s, '\t');
335 dump_hoid(s, backoff->end);
336 seq_putc(s, '\n');
337 }
338
339 mutex_unlock(&osd->lock);
340 }
341
osdc_show(struct seq_file * s,void * pp)342 static int osdc_show(struct seq_file *s, void *pp)
343 {
344 struct ceph_client *client = s->private;
345 struct ceph_osd_client *osdc = &client->osdc;
346 struct rb_node *n;
347
348 down_read(&osdc->lock);
349 seq_printf(s, "REQUESTS %d homeless %d\n",
350 atomic_read(&osdc->num_requests),
351 atomic_read(&osdc->num_homeless));
352 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
353 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
354
355 dump_requests(s, osd);
356 }
357 dump_requests(s, &osdc->homeless_osd);
358
359 seq_puts(s, "LINGER REQUESTS\n");
360 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
361 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
362
363 dump_linger_requests(s, osd);
364 }
365 dump_linger_requests(s, &osdc->homeless_osd);
366
367 seq_puts(s, "BACKOFFS\n");
368 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
369 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
370
371 dump_backoffs(s, osd);
372 }
373
374 up_read(&osdc->lock);
375 return 0;
376 }
377
client_options_show(struct seq_file * s,void * p)378 static int client_options_show(struct seq_file *s, void *p)
379 {
380 struct ceph_client *client = s->private;
381 int ret;
382
383 ret = ceph_print_client_options(s, client, true);
384 if (ret)
385 return ret;
386
387 seq_putc(s, '\n');
388 return 0;
389 }
390
391 DEFINE_SHOW_ATTRIBUTE(monmap);
392 DEFINE_SHOW_ATTRIBUTE(osdmap);
393 DEFINE_SHOW_ATTRIBUTE(monc);
394 DEFINE_SHOW_ATTRIBUTE(osdc);
395 DEFINE_SHOW_ATTRIBUTE(client_options);
396
ceph_debugfs_init(void)397 void __init ceph_debugfs_init(void)
398 {
399 ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
400 }
401
ceph_debugfs_cleanup(void)402 void ceph_debugfs_cleanup(void)
403 {
404 debugfs_remove(ceph_debugfs_dir);
405 }
406
ceph_debugfs_client_init(struct ceph_client * client)407 void ceph_debugfs_client_init(struct ceph_client *client)
408 {
409 char name[80];
410
411 snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
412 client->monc.auth->global_id);
413
414 dout("ceph_debugfs_client_init %p %s\n", client, name);
415
416 client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
417
418 client->monc.debugfs_file = debugfs_create_file("monc",
419 0400,
420 client->debugfs_dir,
421 client,
422 &monc_fops);
423
424 client->osdc.debugfs_file = debugfs_create_file("osdc",
425 0400,
426 client->debugfs_dir,
427 client,
428 &osdc_fops);
429
430 client->debugfs_monmap = debugfs_create_file("monmap",
431 0400,
432 client->debugfs_dir,
433 client,
434 &monmap_fops);
435
436 client->debugfs_osdmap = debugfs_create_file("osdmap",
437 0400,
438 client->debugfs_dir,
439 client,
440 &osdmap_fops);
441
442 client->debugfs_options = debugfs_create_file("client_options",
443 0400,
444 client->debugfs_dir,
445 client,
446 &client_options_fops);
447 }
448
ceph_debugfs_client_cleanup(struct ceph_client * client)449 void ceph_debugfs_client_cleanup(struct ceph_client *client)
450 {
451 dout("ceph_debugfs_client_cleanup %p\n", client);
452 debugfs_remove(client->debugfs_options);
453 debugfs_remove(client->debugfs_osdmap);
454 debugfs_remove(client->debugfs_monmap);
455 debugfs_remove(client->osdc.debugfs_file);
456 debugfs_remove(client->monc.debugfs_file);
457 debugfs_remove(client->debugfs_dir);
458 }
459
460 #else /* CONFIG_DEBUG_FS */
461
ceph_debugfs_init(void)462 void __init ceph_debugfs_init(void)
463 {
464 }
465
ceph_debugfs_cleanup(void)466 void ceph_debugfs_cleanup(void)
467 {
468 }
469
ceph_debugfs_client_init(struct ceph_client * client)470 void ceph_debugfs_client_init(struct ceph_client *client)
471 {
472 }
473
ceph_debugfs_client_cleanup(struct ceph_client * client)474 void ceph_debugfs_client_cleanup(struct ceph_client *client)
475 {
476 }
477
478 #endif /* CONFIG_DEBUG_FS */
479