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_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
metric_show(struct seq_file * s,void * p)143 static int metric_show(struct seq_file *s, void *p)
144 {
145 struct ceph_fs_client *fsc = s->private;
146 struct ceph_mds_client *mdsc = fsc->mdsc;
147 struct ceph_client_metric *m = &mdsc->metric;
148 int nr_caps = 0;
149 s64 total, sum, avg, min, max, sq;
150
151 sum = percpu_counter_sum(&m->total_inodes);
152 seq_printf(s, "item total\n");
153 seq_printf(s, "------------------------------------------\n");
154 seq_printf(s, "%-35s%lld / %lld\n", "opened files / total inodes",
155 atomic64_read(&m->opened_files), sum);
156 seq_printf(s, "%-35s%lld / %lld\n", "pinned i_caps / total inodes",
157 atomic64_read(&m->total_caps), sum);
158 seq_printf(s, "%-35s%lld / %lld\n", "opened inodes / total inodes",
159 percpu_counter_sum(&m->opened_inodes), sum);
160
161 seq_printf(s, "\n");
162 seq_printf(s, "item total avg_lat(us) min_lat(us) max_lat(us) stdev(us)\n");
163 seq_printf(s, "-----------------------------------------------------------------------------------\n");
164
165 spin_lock(&m->read_latency_lock);
166 total = m->total_reads;
167 sum = m->read_latency_sum;
168 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
169 min = m->read_latency_min;
170 max = m->read_latency_max;
171 sq = m->read_latency_sq_sum;
172 spin_unlock(&m->read_latency_lock);
173 CEPH_METRIC_SHOW("read", total, avg, min, max, sq);
174
175 spin_lock(&m->write_latency_lock);
176 total = m->total_writes;
177 sum = m->write_latency_sum;
178 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
179 min = m->write_latency_min;
180 max = m->write_latency_max;
181 sq = m->write_latency_sq_sum;
182 spin_unlock(&m->write_latency_lock);
183 CEPH_METRIC_SHOW("write", total, avg, min, max, sq);
184
185 spin_lock(&m->metadata_latency_lock);
186 total = m->total_metadatas;
187 sum = m->metadata_latency_sum;
188 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
189 min = m->metadata_latency_min;
190 max = m->metadata_latency_max;
191 sq = m->metadata_latency_sq_sum;
192 spin_unlock(&m->metadata_latency_lock);
193 CEPH_METRIC_SHOW("metadata", total, avg, min, max, sq);
194
195 seq_printf(s, "\n");
196 seq_printf(s, "item total miss hit\n");
197 seq_printf(s, "-------------------------------------------------\n");
198
199 seq_printf(s, "%-14s%-16lld%-16lld%lld\n", "d_lease",
200 atomic64_read(&m->total_dentries),
201 percpu_counter_sum(&m->d_lease_mis),
202 percpu_counter_sum(&m->d_lease_hit));
203
204 nr_caps = atomic64_read(&m->total_caps);
205 seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps,
206 percpu_counter_sum(&m->i_caps_mis),
207 percpu_counter_sum(&m->i_caps_hit));
208
209 return 0;
210 }
211
caps_show_cb(struct inode * inode,struct ceph_cap * cap,void * p)212 static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
213 {
214 struct seq_file *s = p;
215
216 seq_printf(s, "0x%-17llx%-3d%-17s%-17s\n", ceph_ino(inode),
217 cap->session->s_mds,
218 ceph_cap_string(cap->issued),
219 ceph_cap_string(cap->implemented));
220 return 0;
221 }
222
caps_show(struct seq_file * s,void * p)223 static int caps_show(struct seq_file *s, void *p)
224 {
225 struct ceph_fs_client *fsc = s->private;
226 struct ceph_mds_client *mdsc = fsc->mdsc;
227 int total, avail, used, reserved, min, i;
228 struct cap_wait *cw;
229
230 ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
231 seq_printf(s, "total\t\t%d\n"
232 "avail\t\t%d\n"
233 "used\t\t%d\n"
234 "reserved\t%d\n"
235 "min\t\t%d\n\n",
236 total, avail, used, reserved, min);
237 seq_printf(s, "ino mds issued implemented\n");
238 seq_printf(s, "--------------------------------------------------\n");
239
240 mutex_lock(&mdsc->mutex);
241 for (i = 0; i < mdsc->max_sessions; i++) {
242 struct ceph_mds_session *session;
243
244 session = __ceph_lookup_mds_session(mdsc, i);
245 if (!session)
246 continue;
247 mutex_unlock(&mdsc->mutex);
248 mutex_lock(&session->s_mutex);
249 ceph_iterate_session_caps(session, caps_show_cb, s);
250 mutex_unlock(&session->s_mutex);
251 ceph_put_mds_session(session);
252 mutex_lock(&mdsc->mutex);
253 }
254 mutex_unlock(&mdsc->mutex);
255
256 seq_printf(s, "\n\nWaiters:\n--------\n");
257 seq_printf(s, "tgid ino need want\n");
258 seq_printf(s, "-----------------------------------------------------\n");
259
260 spin_lock(&mdsc->caps_list_lock);
261 list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
262 seq_printf(s, "%-13d0x%-17llx%-17s%-17s\n", cw->tgid, cw->ino,
263 ceph_cap_string(cw->need),
264 ceph_cap_string(cw->want));
265 }
266 spin_unlock(&mdsc->caps_list_lock);
267
268 return 0;
269 }
270
mds_sessions_show(struct seq_file * s,void * ptr)271 static int mds_sessions_show(struct seq_file *s, void *ptr)
272 {
273 struct ceph_fs_client *fsc = s->private;
274 struct ceph_mds_client *mdsc = fsc->mdsc;
275 struct ceph_auth_client *ac = fsc->client->monc.auth;
276 struct ceph_options *opt = fsc->client->options;
277 int mds;
278
279 mutex_lock(&mdsc->mutex);
280
281 /* The 'num' portion of an 'entity name' */
282 seq_printf(s, "global_id %llu\n", ac->global_id);
283
284 /* The -o name mount argument */
285 seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
286
287 /* The list of MDS session rank+state */
288 for (mds = 0; mds < mdsc->max_sessions; mds++) {
289 struct ceph_mds_session *session =
290 __ceph_lookup_mds_session(mdsc, mds);
291 if (!session) {
292 continue;
293 }
294 mutex_unlock(&mdsc->mutex);
295 seq_printf(s, "mds.%d %s\n",
296 session->s_mds,
297 ceph_session_state_name(session->s_state));
298
299 ceph_put_mds_session(session);
300 mutex_lock(&mdsc->mutex);
301 }
302 mutex_unlock(&mdsc->mutex);
303
304 return 0;
305 }
306
307 DEFINE_SHOW_ATTRIBUTE(mdsmap);
308 DEFINE_SHOW_ATTRIBUTE(mdsc);
309 DEFINE_SHOW_ATTRIBUTE(caps);
310 DEFINE_SHOW_ATTRIBUTE(mds_sessions);
311 DEFINE_SHOW_ATTRIBUTE(metric);
312
313
314 /*
315 * debugfs
316 */
congestion_kb_set(void * data,u64 val)317 static int congestion_kb_set(void *data, u64 val)
318 {
319 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
320
321 fsc->mount_options->congestion_kb = (int)val;
322 return 0;
323 }
324
congestion_kb_get(void * data,u64 * val)325 static int congestion_kb_get(void *data, u64 *val)
326 {
327 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
328
329 *val = (u64)fsc->mount_options->congestion_kb;
330 return 0;
331 }
332
333 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
334 congestion_kb_set, "%llu\n");
335
336
ceph_fs_debugfs_cleanup(struct ceph_fs_client * fsc)337 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
338 {
339 dout("ceph_fs_debugfs_cleanup\n");
340 debugfs_remove(fsc->debugfs_bdi);
341 debugfs_remove(fsc->debugfs_congestion_kb);
342 debugfs_remove(fsc->debugfs_mdsmap);
343 debugfs_remove(fsc->debugfs_mds_sessions);
344 debugfs_remove(fsc->debugfs_caps);
345 debugfs_remove(fsc->debugfs_metric);
346 debugfs_remove(fsc->debugfs_mdsc);
347 }
348
ceph_fs_debugfs_init(struct ceph_fs_client * fsc)349 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
350 {
351 char name[100];
352
353 dout("ceph_fs_debugfs_init\n");
354 fsc->debugfs_congestion_kb =
355 debugfs_create_file("writeback_congestion_kb",
356 0600,
357 fsc->client->debugfs_dir,
358 fsc,
359 &congestion_kb_fops);
360
361 snprintf(name, sizeof(name), "../../bdi/%s",
362 bdi_dev_name(fsc->sb->s_bdi));
363 fsc->debugfs_bdi =
364 debugfs_create_symlink("bdi",
365 fsc->client->debugfs_dir,
366 name);
367
368 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
369 0400,
370 fsc->client->debugfs_dir,
371 fsc,
372 &mdsmap_fops);
373
374 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
375 0400,
376 fsc->client->debugfs_dir,
377 fsc,
378 &mds_sessions_fops);
379
380 fsc->debugfs_mdsc = debugfs_create_file("mdsc",
381 0400,
382 fsc->client->debugfs_dir,
383 fsc,
384 &mdsc_fops);
385
386 fsc->debugfs_metric = debugfs_create_file("metrics",
387 0400,
388 fsc->client->debugfs_dir,
389 fsc,
390 &metric_fops);
391
392 fsc->debugfs_caps = debugfs_create_file("caps",
393 0400,
394 fsc->client->debugfs_dir,
395 fsc,
396 &caps_fops);
397 }
398
399
400 #else /* CONFIG_DEBUG_FS */
401
ceph_fs_debugfs_init(struct ceph_fs_client * fsc)402 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
403 {
404 }
405
ceph_fs_debugfs_cleanup(struct ceph_fs_client * fsc)406 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
407 {
408 }
409
410 #endif /* CONFIG_DEBUG_FS */
411