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ceph: use rbtree for mds requests
[deliverable/linux.git] / fs / ceph / debugfs.c
1 #include "ceph_debug.h"
2
3 #include <linux/device.h>
4 #include <linux/module.h>
5 #include <linux/ctype.h>
6 #include <linux/debugfs.h>
7 #include <linux/seq_file.h>
8
9 #include "super.h"
10 #include "mds_client.h"
11 #include "mon_client.h"
12 #include "auth.h"
13
14 #ifdef CONFIG_DEBUG_FS
15
16 /*
17 * Implement /sys/kernel/debug/ceph fun
18 *
19 * /sys/kernel/debug/ceph/client* - an instance of the ceph client
20 * .../osdmap - current osdmap
21 * .../mdsmap - current mdsmap
22 * .../monmap - current monmap
23 * .../osdc - active osd requests
24 * .../mdsc - active mds requests
25 * .../monc - mon client state
26 * .../dentry_lru - dump contents of dentry lru
27 * .../caps - expose cap (reservation) stats
28 * .../bdi - symlink to ../../bdi/something
29 */
30
31 static struct dentry *ceph_debugfs_dir;
32
33 static int monmap_show(struct seq_file *s, void *p)
34 {
35 int i;
36 struct ceph_client *client = s->private;
37
38 if (client->monc.monmap == NULL)
39 return 0;
40
41 seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
42 for (i = 0; i < client->monc.monmap->num_mon; i++) {
43 struct ceph_entity_inst *inst =
44 &client->monc.monmap->mon_inst[i];
45
46 seq_printf(s, "\t%s%lld\t%s\n",
47 ENTITY_NAME(inst->name),
48 pr_addr(&inst->addr.in_addr));
49 }
50 return 0;
51 }
52
53 static int mdsmap_show(struct seq_file *s, void *p)
54 {
55 int i;
56 struct ceph_client *client = s->private;
57
58 if (client->mdsc.mdsmap == NULL)
59 return 0;
60 seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);
61 seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);
62 seq_printf(s, "session_timeout %d\n",
63 client->mdsc.mdsmap->m_session_timeout);
64 seq_printf(s, "session_autoclose %d\n",
65 client->mdsc.mdsmap->m_session_autoclose);
66 for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {
67 struct ceph_entity_addr *addr =
68 &client->mdsc.mdsmap->m_info[i].addr;
69 int state = client->mdsc.mdsmap->m_info[i].state;
70
71 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),
72 ceph_mds_state_name(state));
73 }
74 return 0;
75 }
76
77 static int osdmap_show(struct seq_file *s, void *p)
78 {
79 int i;
80 struct ceph_client *client = s->private;
81
82 if (client->osdc.osdmap == NULL)
83 return 0;
84 seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
85 seq_printf(s, "flags%s%s\n",
86 (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
87 " NEARFULL" : "",
88 (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
89 " FULL" : "");
90 for (i = 0; i < client->osdc.osdmap->num_pools; i++) {
91 struct ceph_pg_pool_info *pool =
92 &client->osdc.osdmap->pg_pool[i];
93 seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
94 i, pool->v.pg_num, pool->pg_num_mask,
95 pool->v.lpg_num, pool->lpg_num_mask);
96 }
97 for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
98 struct ceph_entity_addr *addr =
99 &client->osdc.osdmap->osd_addr[i];
100 int state = client->osdc.osdmap->osd_state[i];
101 char sb[64];
102
103 seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
104 i, pr_addr(&addr->in_addr),
105 ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
106 ceph_osdmap_state_str(sb, sizeof(sb), state));
107 }
108 return 0;
109 }
110
111 static int monc_show(struct seq_file *s, void *p)
112 {
113 struct ceph_client *client = s->private;
114 struct ceph_mon_statfs_request *req;
115 u64 nexttid = 0;
116 int got;
117 struct ceph_mon_client *monc = &client->monc;
118
119 mutex_lock(&monc->mutex);
120
121 if (monc->have_mdsmap)
122 seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
123 if (monc->have_osdmap)
124 seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
125 if (monc->want_next_osdmap)
126 seq_printf(s, "want next osdmap\n");
127
128 while (nexttid < monc->last_tid) {
129 got = radix_tree_gang_lookup(&monc->statfs_request_tree,
130 (void **)&req, nexttid, 1);
131 if (got == 0)
132 break;
133 nexttid = req->tid + 1;
134
135 seq_printf(s, "%lld statfs\n", req->tid);
136 }
137 mutex_unlock(&monc->mutex);
138
139 return 0;
140 }
141
142 static int mdsc_show(struct seq_file *s, void *p)
143 {
144 struct ceph_client *client = s->private;
145 struct ceph_mds_client *mdsc = &client->mdsc;
146 struct ceph_mds_request *req;
147 struct rb_node *rp;
148 int pathlen;
149 u64 pathbase;
150 char *path;
151
152 mutex_lock(&mdsc->mutex);
153 for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
154 req = rb_entry(rp, struct ceph_mds_request, r_node);
155
156 if (req->r_request)
157 seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
158 else
159 seq_printf(s, "%lld\t(no request)\t", req->r_tid);
160
161 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
162
163 if (req->r_got_unsafe)
164 seq_printf(s, "\t(unsafe)");
165 else
166 seq_printf(s, "\t");
167
168 if (req->r_inode) {
169 seq_printf(s, " #%llx", ceph_ino(req->r_inode));
170 } else if (req->r_dentry) {
171 path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
172 &pathbase, 0);
173 spin_lock(&req->r_dentry->d_lock);
174 seq_printf(s, " #%llx/%.*s (%s)",
175 ceph_ino(req->r_dentry->d_parent->d_inode),
176 req->r_dentry->d_name.len,
177 req->r_dentry->d_name.name,
178 path ? path : "");
179 spin_unlock(&req->r_dentry->d_lock);
180 kfree(path);
181 } else if (req->r_path1) {
182 seq_printf(s, " #%llx/%s", req->r_ino1.ino,
183 req->r_path1);
184 }
185
186 if (req->r_old_dentry) {
187 path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
188 &pathbase, 0);
189 spin_lock(&req->r_old_dentry->d_lock);
190 seq_printf(s, " #%llx/%.*s (%s)",
191 ceph_ino(req->r_old_dentry->d_parent->d_inode),
192 req->r_old_dentry->d_name.len,
193 req->r_old_dentry->d_name.name,
194 path ? path : "");
195 spin_unlock(&req->r_old_dentry->d_lock);
196 kfree(path);
197 } else if (req->r_path2) {
198 if (req->r_ino2.ino)
199 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
200 req->r_path2);
201 else
202 seq_printf(s, " %s", req->r_path2);
203 }
204
205 seq_printf(s, "\n");
206 }
207 mutex_unlock(&mdsc->mutex);
208
209 return 0;
210 }
211
212 static int osdc_show(struct seq_file *s, void *pp)
213 {
214 struct ceph_client *client = s->private;
215 struct ceph_osd_client *osdc = &client->osdc;
216 struct rb_node *p;
217
218 mutex_lock(&osdc->request_mutex);
219 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
220 struct ceph_osd_request *req;
221 struct ceph_osd_request_head *head;
222 struct ceph_osd_op *op;
223 int num_ops;
224 int opcode, olen;
225 int i;
226
227 req = rb_entry(p, struct ceph_osd_request, r_node);
228
229 seq_printf(s, "%lld\tosd%d\t%d.%x\t", req->r_tid,
230 req->r_osd ? req->r_osd->o_osd : -1,
231 le32_to_cpu(req->r_pgid.pool),
232 le16_to_cpu(req->r_pgid.ps));
233
234 head = req->r_request->front.iov_base;
235 op = (void *)(head + 1);
236
237 num_ops = le16_to_cpu(head->num_ops);
238 olen = le32_to_cpu(head->object_len);
239 seq_printf(s, "%.*s", olen,
240 (const char *)(head->ops + num_ops));
241
242 if (req->r_reassert_version.epoch)
243 seq_printf(s, "\t%u'%llu",
244 (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
245 le64_to_cpu(req->r_reassert_version.version));
246 else
247 seq_printf(s, "\t");
248
249 for (i = 0; i < num_ops; i++) {
250 opcode = le16_to_cpu(op->op);
251 seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
252 op++;
253 }
254
255 seq_printf(s, "\n");
256 }
257 mutex_unlock(&osdc->request_mutex);
258 return 0;
259 }
260
261 static int caps_show(struct seq_file *s, void *p)
262 {
263 struct ceph_client *client = p;
264 int total, avail, used, reserved;
265
266 ceph_reservation_status(client, &total, &avail, &used, &reserved);
267 seq_printf(s, "total\t\t%d\n"
268 "avail\t\t%d\n"
269 "used\t\t%d\n"
270 "reserved\t%d\n",
271 total, avail, used, reserved);
272 return 0;
273 }
274
275 static int dentry_lru_show(struct seq_file *s, void *ptr)
276 {
277 struct ceph_client *client = s->private;
278 struct ceph_mds_client *mdsc = &client->mdsc;
279 struct ceph_dentry_info *di;
280
281 spin_lock(&mdsc->dentry_lru_lock);
282 list_for_each_entry(di, &mdsc->dentry_lru, lru) {
283 struct dentry *dentry = di->dentry;
284 seq_printf(s, "%p %p\t%.*s\n",
285 di, dentry, dentry->d_name.len, dentry->d_name.name);
286 }
287 spin_unlock(&mdsc->dentry_lru_lock);
288
289 return 0;
290 }
291
292 #define DEFINE_SHOW_FUNC(name) \
293 static int name##_open(struct inode *inode, struct file *file) \
294 { \
295 struct seq_file *sf; \
296 int ret; \
297 \
298 ret = single_open(file, name, NULL); \
299 sf = file->private_data; \
300 sf->private = inode->i_private; \
301 return ret; \
302 } \
303 \
304 static const struct file_operations name##_fops = { \
305 .open = name##_open, \
306 .read = seq_read, \
307 .llseek = seq_lseek, \
308 .release = single_release, \
309 };
310
311 DEFINE_SHOW_FUNC(monmap_show)
312 DEFINE_SHOW_FUNC(mdsmap_show)
313 DEFINE_SHOW_FUNC(osdmap_show)
314 DEFINE_SHOW_FUNC(monc_show)
315 DEFINE_SHOW_FUNC(mdsc_show)
316 DEFINE_SHOW_FUNC(osdc_show)
317 DEFINE_SHOW_FUNC(dentry_lru_show)
318 DEFINE_SHOW_FUNC(caps_show)
319
320 static int congestion_kb_set(void *data, u64 val)
321 {
322 struct ceph_client *client = (struct ceph_client *)data;
323
324 if (client)
325 client->mount_args->congestion_kb = (int)val;
326
327 return 0;
328 }
329
330 static int congestion_kb_get(void *data, u64 *val)
331 {
332 struct ceph_client *client = (struct ceph_client *)data;
333
334 if (client)
335 *val = (u64)client->mount_args->congestion_kb;
336
337 return 0;
338 }
339
340
341 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
342 congestion_kb_set, "%llu\n");
343
344 int __init ceph_debugfs_init(void)
345 {
346 ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
347 if (!ceph_debugfs_dir)
348 return -ENOMEM;
349 return 0;
350 }
351
352 void ceph_debugfs_cleanup(void)
353 {
354 debugfs_remove(ceph_debugfs_dir);
355 }
356
357 int ceph_debugfs_client_init(struct ceph_client *client)
358 {
359 int ret = 0;
360 char name[80];
361
362 snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
363 PR_FSID(&client->fsid), client->monc.auth->global_id);
364
365 client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
366 if (!client->debugfs_dir)
367 goto out;
368
369 client->monc.debugfs_file = debugfs_create_file("monc",
370 0600,
371 client->debugfs_dir,
372 client,
373 &monc_show_fops);
374 if (!client->monc.debugfs_file)
375 goto out;
376
377 client->mdsc.debugfs_file = debugfs_create_file("mdsc",
378 0600,
379 client->debugfs_dir,
380 client,
381 &mdsc_show_fops);
382 if (!client->mdsc.debugfs_file)
383 goto out;
384
385 client->osdc.debugfs_file = debugfs_create_file("osdc",
386 0600,
387 client->debugfs_dir,
388 client,
389 &osdc_show_fops);
390 if (!client->osdc.debugfs_file)
391 goto out;
392
393 client->debugfs_monmap = debugfs_create_file("monmap",
394 0600,
395 client->debugfs_dir,
396 client,
397 &monmap_show_fops);
398 if (!client->debugfs_monmap)
399 goto out;
400
401 client->debugfs_mdsmap = debugfs_create_file("mdsmap",
402 0600,
403 client->debugfs_dir,
404 client,
405 &mdsmap_show_fops);
406 if (!client->debugfs_mdsmap)
407 goto out;
408
409 client->debugfs_osdmap = debugfs_create_file("osdmap",
410 0600,
411 client->debugfs_dir,
412 client,
413 &osdmap_show_fops);
414 if (!client->debugfs_osdmap)
415 goto out;
416
417 client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
418 0600,
419 client->debugfs_dir,
420 client,
421 &dentry_lru_show_fops);
422 if (!client->debugfs_dentry_lru)
423 goto out;
424
425 client->debugfs_caps = debugfs_create_file("caps",
426 0400,
427 client->debugfs_dir,
428 client,
429 &caps_show_fops);
430 if (!client->debugfs_caps)
431 goto out;
432
433 client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
434 0600,
435 client->debugfs_dir,
436 client,
437 &congestion_kb_fops);
438 if (!client->debugfs_congestion_kb)
439 goto out;
440
441 sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
442 client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
443 name);
444
445 return 0;
446
447 out:
448 ceph_debugfs_client_cleanup(client);
449 return ret;
450 }
451
452 void ceph_debugfs_client_cleanup(struct ceph_client *client)
453 {
454 debugfs_remove(client->debugfs_bdi);
455 debugfs_remove(client->debugfs_caps);
456 debugfs_remove(client->debugfs_dentry_lru);
457 debugfs_remove(client->debugfs_osdmap);
458 debugfs_remove(client->debugfs_mdsmap);
459 debugfs_remove(client->debugfs_monmap);
460 debugfs_remove(client->osdc.debugfs_file);
461 debugfs_remove(client->mdsc.debugfs_file);
462 debugfs_remove(client->monc.debugfs_file);
463 debugfs_remove(client->debugfs_congestion_kb);
464 debugfs_remove(client->debugfs_dir);
465 }
466
467 #else // CONFIG_DEBUG_FS
468
469 int __init ceph_debugfs_init(void)
470 {
471 return 0;
472 }
473
474 void ceph_debugfs_cleanup(void)
475 {
476 }
477
478 int ceph_debugfs_client_init(struct ceph_client *client)
479 {
480 return 0;
481 }
482
483 void ceph_debugfs_client_cleanup(struct ceph_client *client)
484 {
485 }
486
487 #endif // CONFIG_DEBUG_FS
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