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 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 */ 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 } 142 143 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 } 222 223 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 } 270 271 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 static int status_show(struct seq_file *s, void *p) 308 { 309 struct ceph_fs_client *fsc = s->private; 310 struct ceph_entity_inst *inst = &fsc->client->msgr.inst; 311 struct ceph_entity_addr *client_addr = ceph_client_addr(fsc->client); 312 313 seq_printf(s, "instance: %s.%lld %s/%u\n", ENTITY_NAME(inst->name), 314 ceph_pr_addr(client_addr), le32_to_cpu(client_addr->nonce)); 315 seq_printf(s, "blocklisted: %s\n", fsc->blocklisted ? "true" : "false"); 316 317 return 0; 318 } 319 320 DEFINE_SHOW_ATTRIBUTE(mdsmap); 321 DEFINE_SHOW_ATTRIBUTE(mdsc); 322 DEFINE_SHOW_ATTRIBUTE(caps); 323 DEFINE_SHOW_ATTRIBUTE(mds_sessions); 324 DEFINE_SHOW_ATTRIBUTE(metric); 325 DEFINE_SHOW_ATTRIBUTE(status); 326 327 328 /* 329 * debugfs 330 */ 331 static int congestion_kb_set(void *data, u64 val) 332 { 333 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data; 334 335 fsc->mount_options->congestion_kb = (int)val; 336 return 0; 337 } 338 339 static int congestion_kb_get(void *data, u64 *val) 340 { 341 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data; 342 343 *val = (u64)fsc->mount_options->congestion_kb; 344 return 0; 345 } 346 347 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get, 348 congestion_kb_set, "%llu\n"); 349 350 351 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc) 352 { 353 dout("ceph_fs_debugfs_cleanup\n"); 354 debugfs_remove(fsc->debugfs_bdi); 355 debugfs_remove(fsc->debugfs_congestion_kb); 356 debugfs_remove(fsc->debugfs_mdsmap); 357 debugfs_remove(fsc->debugfs_mds_sessions); 358 debugfs_remove(fsc->debugfs_caps); 359 debugfs_remove(fsc->debugfs_metric); 360 debugfs_remove(fsc->debugfs_mdsc); 361 } 362 363 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc) 364 { 365 char name[100]; 366 367 dout("ceph_fs_debugfs_init\n"); 368 fsc->debugfs_congestion_kb = 369 debugfs_create_file("writeback_congestion_kb", 370 0600, 371 fsc->client->debugfs_dir, 372 fsc, 373 &congestion_kb_fops); 374 375 snprintf(name, sizeof(name), "../../bdi/%s", 376 bdi_dev_name(fsc->sb->s_bdi)); 377 fsc->debugfs_bdi = 378 debugfs_create_symlink("bdi", 379 fsc->client->debugfs_dir, 380 name); 381 382 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap", 383 0400, 384 fsc->client->debugfs_dir, 385 fsc, 386 &mdsmap_fops); 387 388 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions", 389 0400, 390 fsc->client->debugfs_dir, 391 fsc, 392 &mds_sessions_fops); 393 394 fsc->debugfs_mdsc = debugfs_create_file("mdsc", 395 0400, 396 fsc->client->debugfs_dir, 397 fsc, 398 &mdsc_fops); 399 400 fsc->debugfs_metric = debugfs_create_file("metrics", 401 0400, 402 fsc->client->debugfs_dir, 403 fsc, 404 &metric_fops); 405 406 fsc->debugfs_caps = debugfs_create_file("caps", 407 0400, 408 fsc->client->debugfs_dir, 409 fsc, 410 &caps_fops); 411 412 fsc->debugfs_status = debugfs_create_file("status", 413 0400, 414 fsc->client->debugfs_dir, 415 fsc, 416 &status_fops); 417 } 418 419 420 #else /* CONFIG_DEBUG_FS */ 421 422 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc) 423 { 424 } 425 426 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc) 427 { 428 } 429 430 #endif /* CONFIG_DEBUG_FS */ 431