ceph: small cleanup in hash function
[linux-3.10.git] / fs / ceph / debugfs.c
1 #include "ceph_debug.h"
2
3 #include <linux/module.h>
4 #include <linux/ctype.h>
5 #include <linux/debugfs.h>
6 #include <linux/seq_file.h>
7
8 #include "super.h"
9 #include "mds_client.h"
10
11 #ifdef CONFIG_DEBUG_FS
12
13 /*
14  * Implement /sys/kernel/debug/ceph fun
15  *
16  * /sys/kernel/debug/ceph/client*  - an instance of the ceph client
17  *      .../osdmap      - current osdmap
18  *      .../mdsmap      - current mdsmap
19  *      .../monmap      - current monmap
20  *      .../osdc        - active osd requests
21  *      .../mdsc        - active mds requests
22  *      .../monc        - mon client state
23  *      .../dentry_lru  - dump contents of dentry lru
24  *      .../caps        - expose cap (reservation) stats
25  */
26
27 static struct dentry *ceph_debugfs_dir;
28
29 static int monmap_show(struct seq_file *s, void *p)
30 {
31         int i;
32         struct ceph_client *client = s->private;
33
34         if (client->monc.monmap == NULL)
35                 return 0;
36
37         seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
38         for (i = 0; i < client->monc.monmap->num_mon; i++) {
39                 struct ceph_entity_inst *inst =
40                         &client->monc.monmap->mon_inst[i];
41
42                 seq_printf(s, "\t%s%lld\t%s\n",
43                            ENTITY_NAME(inst->name),
44                            pr_addr(&inst->addr.in_addr));
45         }
46         return 0;
47 }
48
49 static int mdsmap_show(struct seq_file *s, void *p)
50 {
51         int i;
52         struct ceph_client *client = s->private;
53
54         if (client->mdsc.mdsmap == NULL)
55                 return 0;
56         seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);
57         seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);
58         seq_printf(s, "session_timeout %d\n",
59                        client->mdsc.mdsmap->m_session_timeout);
60         seq_printf(s, "session_autoclose %d\n",
61                        client->mdsc.mdsmap->m_session_autoclose);
62         for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {
63                 struct ceph_entity_addr *addr =
64                         &client->mdsc.mdsmap->m_info[i].addr;
65                 int state = client->mdsc.mdsmap->m_info[i].state;
66
67                 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),
68                                ceph_mds_state_name(state));
69         }
70         return 0;
71 }
72
73 static int osdmap_show(struct seq_file *s, void *p)
74 {
75         int i;
76         struct ceph_client *client = s->private;
77
78         if (client->osdc.osdmap == NULL)
79                 return 0;
80         seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
81         seq_printf(s, "flags%s%s\n",
82                    (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
83                    " NEARFULL" : "",
84                    (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
85                    " FULL" : "");
86         for (i = 0; i < client->osdc.osdmap->num_pools; i++) {
87                 struct ceph_pg_pool_info *pool =
88                         &client->osdc.osdmap->pg_pool[i];
89                 seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
90                            i, pool->v.pg_num, pool->pg_num_mask,
91                            pool->v.lpg_num, pool->lpg_num_mask);
92         }
93         for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
94                 struct ceph_entity_addr *addr =
95                         &client->osdc.osdmap->osd_addr[i];
96                 int state = client->osdc.osdmap->osd_state[i];
97                 char sb[64];
98
99                 seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
100                            i, pr_addr(&addr->in_addr),
101                            ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
102                            ceph_osdmap_state_str(sb, sizeof(sb), state));
103         }
104         return 0;
105 }
106
107 static int monc_show(struct seq_file *s, void *p)
108 {
109         struct ceph_client *client = s->private;
110         struct ceph_mon_statfs_request *req;
111         u64 nexttid = 0;
112         int got;
113         struct ceph_mon_client *monc = &client->monc;
114
115         mutex_lock(&monc->mutex);
116
117         if (monc->have_mdsmap)
118                 seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
119         if (monc->have_osdmap)
120                 seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
121         if (monc->want_next_osdmap)
122                 seq_printf(s, "want next osdmap\n");
123
124         while (nexttid < monc->last_tid) {
125                 got = radix_tree_gang_lookup(&monc->statfs_request_tree,
126                                              (void **)&req, nexttid, 1);
127                 if (got == 0)
128                         break;
129                 nexttid = req->tid + 1;
130
131                 seq_printf(s, "%lld statfs\n", req->tid);
132         }
133         mutex_unlock(&monc->mutex);
134
135         return 0;
136 }
137
138 static int mdsc_show(struct seq_file *s, void *p)
139 {
140         struct ceph_client *client = s->private;
141         struct ceph_mds_request *req;
142         u64 nexttid = 0;
143         int got;
144         struct ceph_mds_client *mdsc = &client->mdsc;
145         int pathlen;
146         u64 pathbase;
147         char *path;
148
149         mutex_lock(&mdsc->mutex);
150         while (nexttid < mdsc->last_tid) {
151                 got = radix_tree_gang_lookup(&mdsc->request_tree,
152                                              (void **)&req, nexttid, 1);
153                 if (got == 0)
154                         break;
155                 nexttid = req->r_tid + 1;
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", req->r_tid,
231                            req->r_osd ? req->r_osd->o_osd : -1);
232
233                 head = req->r_request->front.iov_base;
234                 op = (void *)(head + 1);
235
236                 num_ops = le16_to_cpu(head->num_ops);
237                 olen = le32_to_cpu(head->object_len);
238                 seq_printf(s, "%.*s", olen,
239                            (const char *)(head->ops + num_ops));
240
241                 if (req->r_reassert_version.epoch)
242                         seq_printf(s, "\t%u'%llu",
243                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
244                            le64_to_cpu(req->r_reassert_version.version));
245                 else
246                         seq_printf(s, "\t");
247
248                 for (i = 0; i < num_ops; i++) {
249                         opcode = le16_to_cpu(op->op);
250                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
251                         op++;
252                 }
253
254                 seq_printf(s, "\n");
255         }
256         mutex_unlock(&osdc->request_mutex);
257         return 0;
258 }
259
260 static int caps_show(struct seq_file *s, void *p)
261 {
262         struct ceph_client *client = p;
263         int total, avail, used, reserved;
264
265         ceph_reservation_status(client, &total, &avail, &used, &reserved);
266         seq_printf(s, "total\t\t%d\n"
267                       "avail\t\t%d\n"
268                       "used\t\t%d\n"
269                       "reserved\t%d\n",
270                    total, avail, used, reserved);
271         return 0;
272 }
273
274 static int dentry_lru_show(struct seq_file *s, void *ptr)
275 {
276         struct ceph_client *client = s->private;
277         struct ceph_mds_client *mdsc = &client->mdsc;
278         struct ceph_dentry_info *di;
279
280         spin_lock(&mdsc->dentry_lru_lock);
281         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
282                 struct dentry *dentry = di->dentry;
283                 seq_printf(s, "%p %p\t%.*s\n",
284                            di, dentry, dentry->d_name.len, dentry->d_name.name);
285         }
286         spin_unlock(&mdsc->dentry_lru_lock);
287
288         return 0;
289 }
290
291 #define DEFINE_SHOW_FUNC(name)                                          \
292 static int name##_open(struct inode *inode, struct file *file)          \
293 {                                                                       \
294         struct seq_file *sf;                                            \
295         int ret;                                                        \
296                                                                         \
297         ret = single_open(file, name, NULL);                            \
298         sf = file->private_data;                                        \
299         sf->private = inode->i_private;                                 \
300         return ret;                                                     \
301 }                                                                       \
302                                                                         \
303 static const struct file_operations name##_fops = {                     \
304         .open           = name##_open,                                  \
305         .read           = seq_read,                                     \
306         .llseek         = seq_lseek,                                    \
307         .release        = single_release,                               \
308 };
309
310 DEFINE_SHOW_FUNC(monmap_show)
311 DEFINE_SHOW_FUNC(mdsmap_show)
312 DEFINE_SHOW_FUNC(osdmap_show)
313 DEFINE_SHOW_FUNC(monc_show)
314 DEFINE_SHOW_FUNC(mdsc_show)
315 DEFINE_SHOW_FUNC(osdc_show)
316 DEFINE_SHOW_FUNC(dentry_lru_show)
317 DEFINE_SHOW_FUNC(caps_show)
318
319 int __init ceph_debugfs_init(void)
320 {
321         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
322         if (!ceph_debugfs_dir)
323                 return -ENOMEM;
324         return 0;
325 }
326
327 void ceph_debugfs_cleanup(void)
328 {
329         debugfs_remove(ceph_debugfs_dir);
330 }
331
332 int ceph_debugfs_client_init(struct ceph_client *client)
333 {
334         int ret = 0;
335         char name[80];
336
337         snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
338                  PR_FSID(&client->monc.monmap->fsid), client->whoami);
339
340         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
341         if (!client->debugfs_dir)
342                 goto out;
343
344         client->monc.debugfs_file = debugfs_create_file("monc",
345                                                       0600,
346                                                       client->debugfs_dir,
347                                                       client,
348                                                       &monc_show_fops);
349         if (!client->monc.debugfs_file)
350                 goto out;
351
352         client->mdsc.debugfs_file = debugfs_create_file("mdsc",
353                                                       0600,
354                                                       client->debugfs_dir,
355                                                       client,
356                                                       &mdsc_show_fops);
357         if (!client->mdsc.debugfs_file)
358                 goto out;
359
360         client->osdc.debugfs_file = debugfs_create_file("osdc",
361                                                       0600,
362                                                       client->debugfs_dir,
363                                                       client,
364                                                       &osdc_show_fops);
365         if (!client->osdc.debugfs_file)
366                 goto out;
367
368         client->debugfs_monmap = debugfs_create_file("monmap",
369                                         0600,
370                                         client->debugfs_dir,
371                                         client,
372                                         &monmap_show_fops);
373         if (!client->debugfs_monmap)
374                 goto out;
375
376         client->debugfs_mdsmap = debugfs_create_file("mdsmap",
377                                         0600,
378                                         client->debugfs_dir,
379                                         client,
380                                         &mdsmap_show_fops);
381         if (!client->debugfs_mdsmap)
382                 goto out;
383
384         client->debugfs_osdmap = debugfs_create_file("osdmap",
385                                         0600,
386                                         client->debugfs_dir,
387                                         client,
388                                         &osdmap_show_fops);
389         if (!client->debugfs_osdmap)
390                 goto out;
391
392         client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
393                                         0600,
394                                         client->debugfs_dir,
395                                         client,
396                                         &dentry_lru_show_fops);
397         if (!client->debugfs_dentry_lru)
398                 goto out;
399
400         client->debugfs_caps = debugfs_create_file("caps",
401                                                    0400,
402                                                    client->debugfs_dir,
403                                                    client,
404                                                    &caps_show_fops);
405         if (!client->debugfs_caps)
406                 goto out;
407
408         return 0;
409
410 out:
411         ceph_debugfs_client_cleanup(client);
412         return ret;
413 }
414
415 void ceph_debugfs_client_cleanup(struct ceph_client *client)
416 {
417         debugfs_remove(client->debugfs_caps);
418         debugfs_remove(client->debugfs_dentry_lru);
419         debugfs_remove(client->debugfs_osdmap);
420         debugfs_remove(client->debugfs_mdsmap);
421         debugfs_remove(client->debugfs_monmap);
422         debugfs_remove(client->osdc.debugfs_file);
423         debugfs_remove(client->mdsc.debugfs_file);
424         debugfs_remove(client->monc.debugfs_file);
425         debugfs_remove(client->debugfs_dir);
426 }
427
428 #else  // CONFIG_DEBUG_FS
429
430 int __init ceph_debugfs_init(void)
431 {
432         return 0;
433 }
434
435 void ceph_debugfs_cleanup(void)
436 {
437 }
438
439 int ceph_debugfs_client_init(struct ceph_client *client)
440 {
441         return 0;
442 }
443
444 void ceph_debugfs_client_cleanup(struct ceph_client *client)
445 {
446 }
447
448 #endif  // CONFIG_DEBUG_FS