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2024-05-10 cde9070d9970eef1f7ec2360586c802a16230ad8 
 kernel/fs/ceph/debugfs.c
....@@ -7,6 +7,8 @@
77 #include <linux/ctype.h>
88 #include <linux/debugfs.h>
99 #include <linux/seq_file.h>
10
+#include <linux/math64.h>
11
+#include <linux/ktime.h>
1012 
1113 #include <linux/ceph/libceph.h>
1214 #include <linux/ceph/mon_client.h>
....@@ -18,6 +20,7 @@
1820 #ifdef CONFIG_DEBUG_FS
1921 
2022 #include "mds_client.h"
23
+#include "metric.h"
2124 
2225 static int mdsmap_show(struct seq_file *s, void *p)
2326 {
....@@ -33,11 +36,11 @@
3336 	seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
3437 	seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
3538 	seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
36
-	for (i = 0; i < mdsmap->m_num_mds; i++) {
39
+	for (i = 0; i < mdsmap->possible_max_rank; i++) {
3740 		struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
3841 		int state = mdsmap->m_info[i].state;
3942 		seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
40
-			       ceph_pr_addr(&addr->in_addr),
43
+			       ceph_pr_addr(addr),
4144 			       ceph_mds_state_name(state));
4245 	}
4346 	return 0;
....@@ -52,7 +55,7 @@
5255 	struct ceph_mds_client *mdsc = fsc->mdsc;
5356 	struct ceph_mds_request *req;
5457 	struct rb_node *rp;
55
-	int pathlen;
58
+	int pathlen = 0;
5659 	u64 pathbase;
5760 	char *path;
5861 
....@@ -88,7 +91,7 @@
8891 				   req->r_dentry,
8992 				   path ? path : "");
9093 			spin_unlock(&req->r_dentry->d_lock);
91
-			kfree(path);
94
+			ceph_mdsc_free_path(path, pathlen);
9295 		} else if (req->r_path1) {
9396 			seq_printf(s, " #%llx/%s", req->r_ino1.ino,
9497 				   req->r_path1);
....@@ -108,7 +111,7 @@
108111 				   req->r_old_dentry,
109112 				   path ? path : "");
110113 			spin_unlock(&req->r_old_dentry->d_lock);
111
-			kfree(path);
114
+			ceph_mdsc_free_path(path, pathlen);
112115 		} else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
113116 			if (req->r_ino2.ino)
114117 				seq_printf(s, " #%llx/%s", req->r_ino2.ino,
....@@ -124,34 +127,143 @@
124127 	return 0;
125128 }
126129 
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
+
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
+
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
+
127223 static int caps_show(struct seq_file *s, void *p)
128224 {
129225 	struct ceph_fs_client *fsc = s->private;
130
-	int total, avail, used, reserved, min;
226
+	struct ceph_mds_client *mdsc = fsc->mdsc;
227
+	int total, avail, used, reserved, min, i;
228
+	struct cap_wait	*cw;
131229 
132230 	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
133231 	seq_printf(s, "total\t\t%d\n"
134232 		   "avail\t\t%d\n"
135233 		   "used\t\t%d\n"
136234 		   "reserved\t%d\n"
137
-		   "min\t%d\n",
235
+		   "min\t\t%d\n\n",
138236 		   total, avail, used, reserved, min);
139
-	return 0;
140
-}
237
+	seq_printf(s, "ino              mds  issued           implemented\n");
238
+	seq_printf(s, "--------------------------------------------------\n");
141239 
142
-static int dentry_lru_show(struct seq_file *s, void *ptr)
143
-{
144
-	struct ceph_fs_client *fsc = s->private;
145
-	struct ceph_mds_client *mdsc = fsc->mdsc;
146
-	struct ceph_dentry_info *di;
240
+	mutex_lock(&mdsc->mutex);
241
+	for (i = 0; i < mdsc->max_sessions; i++) {
242
+		struct ceph_mds_session *session;
147243 
148
-	spin_lock(&mdsc->dentry_lru_lock);
149
-	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
150
-		struct dentry *dentry = di->dentry;
151
-		seq_printf(s, "%p %p\t%pd\n",
152
-			   di, dentry, dentry);
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);
153253 	}
154
-	spin_unlock(&mdsc->dentry_lru_lock);
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);
155267 
156268 	return 0;
157269 }
....@@ -162,7 +274,7 @@
162274 	struct ceph_mds_client *mdsc = fsc->mdsc;
163275 	struct ceph_auth_client *ac = fsc->client->monc.auth;
164276 	struct ceph_options *opt = fsc->client->options;
165
-	int mds = -1;
277
+	int mds;
166278 
167279 	mutex_lock(&mdsc->mutex);
168280 
....@@ -192,11 +304,11 @@
192304 	return 0;
193305 }
194306 
195
-CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
196
-CEPH_DEFINE_SHOW_FUNC(mdsc_show)
197
-CEPH_DEFINE_SHOW_FUNC(caps_show)
198
-CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
199
-CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
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);
200312 
201313 
202314 /*
....@@ -230,25 +342,21 @@
230342 	debugfs_remove(fsc->debugfs_mdsmap);
231343 	debugfs_remove(fsc->debugfs_mds_sessions);
232344 	debugfs_remove(fsc->debugfs_caps);
345
+	debugfs_remove(fsc->debugfs_metric);
233346 	debugfs_remove(fsc->debugfs_mdsc);
234
-	debugfs_remove(fsc->debugfs_dentry_lru);
235347 }
236348 
237
-int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
349
+void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
238350 {
239351 	char name[100];
240
-	int err = -ENOMEM;
241352 
242353 	dout("ceph_fs_debugfs_init\n");
243
-	BUG_ON(!fsc->client->debugfs_dir);
244354 	fsc->debugfs_congestion_kb =
245355 		debugfs_create_file("writeback_congestion_kb",
246356 				    0600,
247357 				    fsc->client->debugfs_dir,
248358 				    fsc,
249359 				    &congestion_kb_fops);
250
-	if (!fsc->debugfs_congestion_kb)
251
-		goto out;
252360 
253361 	snprintf(name, sizeof(name), "../../bdi/%s",
254362 		 bdi_dev_name(fsc->sb->s_bdi));
....@@ -256,62 +364,43 @@
256364 		debugfs_create_symlink("bdi",
257365 				       fsc->client->debugfs_dir,
258366 				       name);
259
-	if (!fsc->debugfs_bdi)
260
-		goto out;
261367 
262368 	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
263369 					0400,
264370 					fsc->client->debugfs_dir,
265371 					fsc,
266
-					&mdsmap_show_fops);
267
-	if (!fsc->debugfs_mdsmap)
268
-		goto out;
372
+					&mdsmap_fops);
269373 
270374 	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
271375 					0400,
272376 					fsc->client->debugfs_dir,
273377 					fsc,
274
-					&mds_sessions_show_fops);
275
-	if (!fsc->debugfs_mds_sessions)
276
-		goto out;
378
+					&mds_sessions_fops);
277379 
278380 	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
279381 						0400,
280382 						fsc->client->debugfs_dir,
281383 						fsc,
282
-						&mdsc_show_fops);
283
-	if (!fsc->debugfs_mdsc)
284
-		goto out;
384
+						&mdsc_fops);
385
+
386
+	fsc->debugfs_metric = debugfs_create_file("metrics",
387
+						  0400,
388
+						  fsc->client->debugfs_dir,
389
+						  fsc,
390
+						  &metric_fops);
285391 
286392 	fsc->debugfs_caps = debugfs_create_file("caps",
287
-						   0400,
288
-						   fsc->client->debugfs_dir,
289
-						   fsc,
290
-						   &caps_show_fops);
291
-	if (!fsc->debugfs_caps)
292
-		goto out;
293
-
294
-	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
295
-					0400,
296
-					fsc->client->debugfs_dir,
297
-					fsc,
298
-					&dentry_lru_show_fops);
299
-	if (!fsc->debugfs_dentry_lru)
300
-		goto out;
301
-
302
-	return 0;
303
-
304
-out:
305
-	ceph_fs_debugfs_cleanup(fsc);
306
-	return err;
393
+						0400,
394
+						fsc->client->debugfs_dir,
395
+						fsc,
396
+						&caps_fops);
307397 }
308398 
309399 
310400 #else  /* CONFIG_DEBUG_FS */
311401 
312
-int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
402
+void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
313403 {
314
-	return 0;
315404 }
316405 
317406 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)