ceph: use %pU to print uuid (fsid)
[linux-3.10.git] / fs / ceph / debugfs.c
1 #include "ceph_debug.h"
2
3 #include <linux/device.h>
4 #include <linux/slab.h>
5 #include <linux/module.h>
6 #include <linux/ctype.h>
7 #include <linux/debugfs.h>
8 #include <linux/seq_file.h>
9
10 #include "super.h"
11 #include "mds_client.h"
12 #include "mon_client.h"
13 #include "auth.h"
14
15 #ifdef CONFIG_DEBUG_FS
16
17 /*
18  * Implement /sys/kernel/debug/ceph fun
19  *
20  * /sys/kernel/debug/ceph/client*  - an instance of the ceph client
21  *      .../osdmap      - current osdmap
22  *      .../mdsmap      - current mdsmap
23  *      .../monmap      - current monmap
24  *      .../osdc        - active osd requests
25  *      .../mdsc        - active mds requests
26  *      .../monc        - mon client state
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
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                            pr_addr(&inst->addr.in_addr));
50         }
51         return 0;
52 }
53
54 static int mdsmap_show(struct seq_file *s, void *p)
55 {
56         int i;
57         struct ceph_client *client = s->private;
58
59         if (client->mdsc.mdsmap == NULL)
60                 return 0;
61         seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);
62         seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);
63         seq_printf(s, "session_timeout %d\n",
64                        client->mdsc.mdsmap->m_session_timeout);
65         seq_printf(s, "session_autoclose %d\n",
66                        client->mdsc.mdsmap->m_session_autoclose);
67         for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {
68                 struct ceph_entity_addr *addr =
69                         &client->mdsc.mdsmap->m_info[i].addr;
70                 int state = client->mdsc.mdsmap->m_info[i].state;
71
72                 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),
73                                ceph_mds_state_name(state));
74         }
75         return 0;
76 }
77
78 static int osdmap_show(struct seq_file *s, void *p)
79 {
80         int i;
81         struct ceph_client *client = s->private;
82         struct rb_node *n;
83
84         if (client->osdc.osdmap == NULL)
85                 return 0;
86         seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
87         seq_printf(s, "flags%s%s\n",
88                    (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
89                    " NEARFULL" : "",
90                    (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
91                    " FULL" : "");
92         for (n = rb_first(&client->osdc.osdmap->pg_pools); n; n = rb_next(n)) {
93                 struct ceph_pg_pool_info *pool =
94                         rb_entry(n, struct ceph_pg_pool_info, node);
95                 seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
96                            pool->id, pool->v.pg_num, pool->pg_num_mask,
97                            pool->v.lpg_num, pool->lpg_num_mask);
98         }
99         for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
100                 struct ceph_entity_addr *addr =
101                         &client->osdc.osdmap->osd_addr[i];
102                 int state = client->osdc.osdmap->osd_state[i];
103                 char sb[64];
104
105                 seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
106                            i, pr_addr(&addr->in_addr),
107                            ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
108                            ceph_osdmap_state_str(sb, sizeof(sb), state));
109         }
110         return 0;
111 }
112
113 static int monc_show(struct seq_file *s, void *p)
114 {
115         struct ceph_client *client = s->private;
116         struct ceph_mon_generic_request *req;
117         struct ceph_mon_client *monc = &client->monc;
118         struct rb_node *rp;
119
120         mutex_lock(&monc->mutex);
121
122         if (monc->have_mdsmap)
123                 seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
124         if (monc->have_osdmap)
125                 seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
126         if (monc->want_next_osdmap)
127                 seq_printf(s, "want next osdmap\n");
128
129         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
130                 __u16 op;
131                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
132                 op = le16_to_cpu(req->request->hdr.type);
133                 if (op == CEPH_MSG_STATFS)
134                         seq_printf(s, "%lld statfs\n", req->tid);
135                 else
136                         seq_printf(s, "%lld unknown\n", req->tid);
137         }
138
139         mutex_unlock(&monc->mutex);
140         return 0;
141 }
142
143 static int mdsc_show(struct seq_file *s, void *p)
144 {
145         struct ceph_client *client = s->private;
146         struct ceph_mds_client *mdsc = &client->mdsc;
147         struct ceph_mds_request *req;
148         struct rb_node *rp;
149         int pathlen;
150         u64 pathbase;
151         char *path;
152
153         mutex_lock(&mdsc->mutex);
154         for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
155                 req = rb_entry(rp, struct ceph_mds_request, r_node);
156
157                 if (req->r_request)
158                         seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
159                 else
160                         seq_printf(s, "%lld\t(no request)\t", req->r_tid);
161
162                 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
163
164                 if (req->r_got_unsafe)
165                         seq_printf(s, "\t(unsafe)");
166                 else
167                         seq_printf(s, "\t");
168
169                 if (req->r_inode) {
170                         seq_printf(s, " #%llx", ceph_ino(req->r_inode));
171                 } else if (req->r_dentry) {
172                         path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
173                                                     &pathbase, 0);
174                         spin_lock(&req->r_dentry->d_lock);
175                         seq_printf(s, " #%llx/%.*s (%s)",
176                                    ceph_ino(req->r_dentry->d_parent->d_inode),
177                                    req->r_dentry->d_name.len,
178                                    req->r_dentry->d_name.name,
179                                    path ? path : "");
180                         spin_unlock(&req->r_dentry->d_lock);
181                         kfree(path);
182                 } else if (req->r_path1) {
183                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
184                                    req->r_path1);
185                 }
186
187                 if (req->r_old_dentry) {
188                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
189                                                     &pathbase, 0);
190                         spin_lock(&req->r_old_dentry->d_lock);
191                         seq_printf(s, " #%llx/%.*s (%s)",
192                            ceph_ino(req->r_old_dentry->d_parent->d_inode),
193                                    req->r_old_dentry->d_name.len,
194                                    req->r_old_dentry->d_name.name,
195                                    path ? path : "");
196                         spin_unlock(&req->r_old_dentry->d_lock);
197                         kfree(path);
198                 } else if (req->r_path2) {
199                         if (req->r_ino2.ino)
200                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
201                                            req->r_path2);
202                         else
203                                 seq_printf(s, " %s", req->r_path2);
204                 }
205
206                 seq_printf(s, "\n");
207         }
208         mutex_unlock(&mdsc->mutex);
209
210         return 0;
211 }
212
213 static int osdc_show(struct seq_file *s, void *pp)
214 {
215         struct ceph_client *client = s->private;
216         struct ceph_osd_client *osdc = &client->osdc;
217         struct rb_node *p;
218
219         mutex_lock(&osdc->request_mutex);
220         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
221                 struct ceph_osd_request *req;
222                 struct ceph_osd_request_head *head;
223                 struct ceph_osd_op *op;
224                 int num_ops;
225                 int opcode, olen;
226                 int i;
227
228                 req = rb_entry(p, struct ceph_osd_request, r_node);
229
230                 seq_printf(s, "%lld\tosd%d\t%d.%x\t", req->r_tid,
231                            req->r_osd ? req->r_osd->o_osd : -1,
232                            le32_to_cpu(req->r_pgid.pool),
233                            le16_to_cpu(req->r_pgid.ps));
234
235                 head = req->r_request->front.iov_base;
236                 op = (void *)(head + 1);
237
238                 num_ops = le16_to_cpu(head->num_ops);
239                 olen = le32_to_cpu(head->object_len);
240                 seq_printf(s, "%.*s", olen,
241                            (const char *)(head->ops + num_ops));
242
243                 if (req->r_reassert_version.epoch)
244                         seq_printf(s, "\t%u'%llu",
245                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
246                            le64_to_cpu(req->r_reassert_version.version));
247                 else
248                         seq_printf(s, "\t");
249
250                 for (i = 0; i < num_ops; i++) {
251                         opcode = le16_to_cpu(op->op);
252                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
253                         op++;
254                 }
255
256                 seq_printf(s, "\n");
257         }
258         mutex_unlock(&osdc->request_mutex);
259         return 0;
260 }
261
262 static int caps_show(struct seq_file *s, void *p)
263 {
264         struct ceph_client *client = s->private;
265         int total, avail, used, reserved, min;
266
267         ceph_reservation_status(client, &total, &avail, &used, &reserved, &min);
268         seq_printf(s, "total\t\t%d\n"
269                    "avail\t\t%d\n"
270                    "used\t\t%d\n"
271                    "reserved\t%d\n"
272                    "min\t%d\n",
273                    total, avail, used, reserved, min);
274         return 0;
275 }
276
277 static int dentry_lru_show(struct seq_file *s, void *ptr)
278 {
279         struct ceph_client *client = s->private;
280         struct ceph_mds_client *mdsc = &client->mdsc;
281         struct ceph_dentry_info *di;
282
283         spin_lock(&mdsc->dentry_lru_lock);
284         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
285                 struct dentry *dentry = di->dentry;
286                 seq_printf(s, "%p %p\t%.*s\n",
287                            di, dentry, dentry->d_name.len, dentry->d_name.name);
288         }
289         spin_unlock(&mdsc->dentry_lru_lock);
290
291         return 0;
292 }
293
294 #define DEFINE_SHOW_FUNC(name)                                          \
295 static int name##_open(struct inode *inode, struct file *file)          \
296 {                                                                       \
297         struct seq_file *sf;                                            \
298         int ret;                                                        \
299                                                                         \
300         ret = single_open(file, name, NULL);                            \
301         sf = file->private_data;                                        \
302         sf->private = inode->i_private;                                 \
303         return ret;                                                     \
304 }                                                                       \
305                                                                         \
306 static const struct file_operations name##_fops = {                     \
307         .open           = name##_open,                                  \
308         .read           = seq_read,                                     \
309         .llseek         = seq_lseek,                                    \
310         .release        = single_release,                               \
311 };
312
313 DEFINE_SHOW_FUNC(monmap_show)
314 DEFINE_SHOW_FUNC(mdsmap_show)
315 DEFINE_SHOW_FUNC(osdmap_show)
316 DEFINE_SHOW_FUNC(monc_show)
317 DEFINE_SHOW_FUNC(mdsc_show)
318 DEFINE_SHOW_FUNC(osdc_show)
319 DEFINE_SHOW_FUNC(dentry_lru_show)
320 DEFINE_SHOW_FUNC(caps_show)
321
322 static int congestion_kb_set(void *data, u64 val)
323 {
324         struct ceph_client *client = (struct ceph_client *)data;
325
326         if (client)
327                 client->mount_args->congestion_kb = (int)val;
328
329         return 0;
330 }
331
332 static int congestion_kb_get(void *data, u64 *val)
333 {
334         struct ceph_client *client = (struct ceph_client *)data;
335
336         if (client)
337                 *val = (u64)client->mount_args->congestion_kb;
338
339         return 0;
340 }
341
342
343 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
344                         congestion_kb_set, "%llu\n");
345
346 int __init ceph_debugfs_init(void)
347 {
348         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
349         if (!ceph_debugfs_dir)
350                 return -ENOMEM;
351         return 0;
352 }
353
354 void ceph_debugfs_cleanup(void)
355 {
356         debugfs_remove(ceph_debugfs_dir);
357 }
358
359 int ceph_debugfs_client_init(struct ceph_client *client)
360 {
361         int ret = 0;
362         char name[80];
363
364         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
365                  client->monc.auth->global_id);
366
367         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
368         if (!client->debugfs_dir)
369                 goto out;
370
371         client->monc.debugfs_file = debugfs_create_file("monc",
372                                                       0600,
373                                                       client->debugfs_dir,
374                                                       client,
375                                                       &monc_show_fops);
376         if (!client->monc.debugfs_file)
377                 goto out;
378
379         client->mdsc.debugfs_file = debugfs_create_file("mdsc",
380                                                       0600,
381                                                       client->debugfs_dir,
382                                                       client,
383                                                       &mdsc_show_fops);
384         if (!client->mdsc.debugfs_file)
385                 goto out;
386
387         client->osdc.debugfs_file = debugfs_create_file("osdc",
388                                                       0600,
389                                                       client->debugfs_dir,
390                                                       client,
391                                                       &osdc_show_fops);
392         if (!client->osdc.debugfs_file)
393                 goto out;
394
395         client->debugfs_monmap = debugfs_create_file("monmap",
396                                         0600,
397                                         client->debugfs_dir,
398                                         client,
399                                         &monmap_show_fops);
400         if (!client->debugfs_monmap)
401                 goto out;
402
403         client->debugfs_mdsmap = debugfs_create_file("mdsmap",
404                                         0600,
405                                         client->debugfs_dir,
406                                         client,
407                                         &mdsmap_show_fops);
408         if (!client->debugfs_mdsmap)
409                 goto out;
410
411         client->debugfs_osdmap = debugfs_create_file("osdmap",
412                                         0600,
413                                         client->debugfs_dir,
414                                         client,
415                                         &osdmap_show_fops);
416         if (!client->debugfs_osdmap)
417                 goto out;
418
419         client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
420                                         0600,
421                                         client->debugfs_dir,
422                                         client,
423                                         &dentry_lru_show_fops);
424         if (!client->debugfs_dentry_lru)
425                 goto out;
426
427         client->debugfs_caps = debugfs_create_file("caps",
428                                                    0400,
429                                                    client->debugfs_dir,
430                                                    client,
431                                                    &caps_show_fops);
432         if (!client->debugfs_caps)
433                 goto out;
434
435         client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
436                                                    0600,
437                                                    client->debugfs_dir,
438                                                    client,
439                                                    &congestion_kb_fops);
440         if (!client->debugfs_congestion_kb)
441                 goto out;
442
443         sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
444         client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
445                                                      name);
446
447         return 0;
448
449 out:
450         ceph_debugfs_client_cleanup(client);
451         return ret;
452 }
453
454 void ceph_debugfs_client_cleanup(struct ceph_client *client)
455 {
456         debugfs_remove(client->debugfs_bdi);
457         debugfs_remove(client->debugfs_caps);
458         debugfs_remove(client->debugfs_dentry_lru);
459         debugfs_remove(client->debugfs_osdmap);
460         debugfs_remove(client->debugfs_mdsmap);
461         debugfs_remove(client->debugfs_monmap);
462         debugfs_remove(client->osdc.debugfs_file);
463         debugfs_remove(client->mdsc.debugfs_file);
464         debugfs_remove(client->monc.debugfs_file);
465         debugfs_remove(client->debugfs_congestion_kb);
466         debugfs_remove(client->debugfs_dir);
467 }
468
469 #else  // CONFIG_DEBUG_FS
470
471 int __init ceph_debugfs_init(void)
472 {
473         return 0;
474 }
475
476 void ceph_debugfs_cleanup(void)
477 {
478 }
479
480 int ceph_debugfs_client_init(struct ceph_client *client)
481 {
482         return 0;
483 }
484
485 void ceph_debugfs_client_cleanup(struct ceph_client *client)
486 {
487 }
488
489 #endif  // CONFIG_DEBUG_FS