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 i, nr_caps = 0; 149 s64 total, sum, avg, min, max, sq; 150 151 seq_printf(s, "item total avg_lat(us) min_lat(us) max_lat(us) stdev(us)\n"); 152 seq_printf(s, "-----------------------------------------------------------------------------------\n"); 153 154 spin_lock(&m->read_latency_lock); 155 total = m->total_reads; 156 sum = m->read_latency_sum; 157 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0; 158 min = m->read_latency_min; 159 max = m->read_latency_max; 160 sq = m->read_latency_sq_sum; 161 spin_unlock(&m->read_latency_lock); 162 CEPH_METRIC_SHOW("read", total, avg, min, max, sq); 163 164 spin_lock(&m->write_latency_lock); 165 total = m->total_writes; 166 sum = m->write_latency_sum; 167 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0; 168 min = m->write_latency_min; 169 max = m->write_latency_max; 170 sq = m->write_latency_sq_sum; 171 spin_unlock(&m->write_latency_lock); 172 CEPH_METRIC_SHOW("write", total, avg, min, max, sq); 173 174 spin_lock(&m->metadata_latency_lock); 175 total = m->total_metadatas; 176 sum = m->metadata_latency_sum; 177 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0; 178 min = m->metadata_latency_min; 179 max = m->metadata_latency_max; 180 sq = m->metadata_latency_sq_sum; 181 spin_unlock(&m->metadata_latency_lock); 182 CEPH_METRIC_SHOW("metadata", total, avg, min, max, sq); 183 184 seq_printf(s, "\n"); 185 seq_printf(s, "item total miss hit\n"); 186 seq_printf(s, "-------------------------------------------------\n"); 187 188 seq_printf(s, "%-14s%-16lld%-16lld%lld\n", "d_lease", 189 atomic64_read(&m->total_dentries), 190 percpu_counter_sum(&m->d_lease_mis), 191 percpu_counter_sum(&m->d_lease_hit)); 192 193 mutex_lock(&mdsc->mutex); 194 for (i = 0; i < mdsc->max_sessions; i++) { 195 struct ceph_mds_session *s; 196 197 s = __ceph_lookup_mds_session(mdsc, i); 198 if (!s) 199 continue; 200 nr_caps += s->s_nr_caps; 201 ceph_put_mds_session(s); 202 } 203 mutex_unlock(&mdsc->mutex); 204 seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps, 205 percpu_counter_sum(&m->i_caps_mis), 206 percpu_counter_sum(&m->i_caps_hit)); 207 208 return 0; 209 } 210 211 static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p) 212 { 213 struct seq_file *s = p; 214 215 seq_printf(s, "0x%-17lx%-17s%-17s\n", inode->i_ino, 216 ceph_cap_string(cap->issued), 217 ceph_cap_string(cap->implemented)); 218 return 0; 219 } 220 221 static int caps_show(struct seq_file *s, void *p) 222 { 223 struct ceph_fs_client *fsc = s->private; 224 struct ceph_mds_client *mdsc = fsc->mdsc; 225 int total, avail, used, reserved, min, i; 226 struct cap_wait *cw; 227 228 ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min); 229 seq_printf(s, "total\t\t%d\n" 230 "avail\t\t%d\n" 231 "used\t\t%d\n" 232 "reserved\t%d\n" 233 "min\t\t%d\n\n", 234 total, avail, used, reserved, min); 235 seq_printf(s, "ino issued implemented\n"); 236 seq_printf(s, "-----------------------------------------------\n"); 237 238 mutex_lock(&mdsc->mutex); 239 for (i = 0; i < mdsc->max_sessions; i++) { 240 struct ceph_mds_session *session; 241 242 session = __ceph_lookup_mds_session(mdsc, i); 243 if (!session) 244 continue; 245 mutex_unlock(&mdsc->mutex); 246 mutex_lock(&session->s_mutex); 247 ceph_iterate_session_caps(session, caps_show_cb, s); 248 mutex_unlock(&session->s_mutex); 249 ceph_put_mds_session(session); 250 mutex_lock(&mdsc->mutex); 251 } 252 mutex_unlock(&mdsc->mutex); 253 254 seq_printf(s, "\n\nWaiters:\n--------\n"); 255 seq_printf(s, "tgid ino need want\n"); 256 seq_printf(s, "-----------------------------------------------------\n"); 257 258 spin_lock(&mdsc->caps_list_lock); 259 list_for_each_entry(cw, &mdsc->cap_wait_list, list) { 260 seq_printf(s, "%-13d0x%-17lx%-17s%-17s\n", cw->tgid, cw->ino, 261 ceph_cap_string(cw->need), 262 ceph_cap_string(cw->want)); 263 } 264 spin_unlock(&mdsc->caps_list_lock); 265 266 return 0; 267 } 268 269 static int mds_sessions_show(struct seq_file *s, void *ptr) 270 { 271 struct ceph_fs_client *fsc = s->private; 272 struct ceph_mds_client *mdsc = fsc->mdsc; 273 struct ceph_auth_client *ac = fsc->client->monc.auth; 274 struct ceph_options *opt = fsc->client->options; 275 int mds = -1; 276 277 mutex_lock(&mdsc->mutex); 278 279 /* The 'num' portion of an 'entity name' */ 280 seq_printf(s, "global_id %llu\n", ac->global_id); 281 282 /* The -o name mount argument */ 283 seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : ""); 284 285 /* The list of MDS session rank+state */ 286 for (mds = 0; mds < mdsc->max_sessions; mds++) { 287 struct ceph_mds_session *session = 288 __ceph_lookup_mds_session(mdsc, mds); 289 if (!session) { 290 continue; 291 } 292 mutex_unlock(&mdsc->mutex); 293 seq_printf(s, "mds.%d %s\n", 294 session->s_mds, 295 ceph_session_state_name(session->s_state)); 296 297 ceph_put_mds_session(session); 298 mutex_lock(&mdsc->mutex); 299 } 300 mutex_unlock(&mdsc->mutex); 301 302 return 0; 303 } 304 305 DEFINE_SHOW_ATTRIBUTE(mdsmap); 306 DEFINE_SHOW_ATTRIBUTE(mdsc); 307 DEFINE_SHOW_ATTRIBUTE(caps); 308 DEFINE_SHOW_ATTRIBUTE(mds_sessions); 309 DEFINE_SHOW_ATTRIBUTE(metric); 310 311 312 /* 313 * debugfs 314 */ 315 static int congestion_kb_set(void *data, u64 val) 316 { 317 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data; 318 319 fsc->mount_options->congestion_kb = (int)val; 320 return 0; 321 } 322 323 static int congestion_kb_get(void *data, u64 *val) 324 { 325 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data; 326 327 *val = (u64)fsc->mount_options->congestion_kb; 328 return 0; 329 } 330 331 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get, 332 congestion_kb_set, "%llu\n"); 333 334 335 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc) 336 { 337 dout("ceph_fs_debugfs_cleanup\n"); 338 debugfs_remove(fsc->debugfs_bdi); 339 debugfs_remove(fsc->debugfs_congestion_kb); 340 debugfs_remove(fsc->debugfs_mdsmap); 341 debugfs_remove(fsc->debugfs_mds_sessions); 342 debugfs_remove(fsc->debugfs_caps); 343 debugfs_remove(fsc->debugfs_metric); 344 debugfs_remove(fsc->debugfs_mdsc); 345 } 346 347 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc) 348 { 349 char name[100]; 350 351 dout("ceph_fs_debugfs_init\n"); 352 fsc->debugfs_congestion_kb = 353 debugfs_create_file("writeback_congestion_kb", 354 0600, 355 fsc->client->debugfs_dir, 356 fsc, 357 &congestion_kb_fops); 358 359 snprintf(name, sizeof(name), "../../bdi/%s", 360 bdi_dev_name(fsc->sb->s_bdi)); 361 fsc->debugfs_bdi = 362 debugfs_create_symlink("bdi", 363 fsc->client->debugfs_dir, 364 name); 365 366 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap", 367 0400, 368 fsc->client->debugfs_dir, 369 fsc, 370 &mdsmap_fops); 371 372 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions", 373 0400, 374 fsc->client->debugfs_dir, 375 fsc, 376 &mds_sessions_fops); 377 378 fsc->debugfs_mdsc = debugfs_create_file("mdsc", 379 0400, 380 fsc->client->debugfs_dir, 381 fsc, 382 &mdsc_fops); 383 384 fsc->debugfs_metric = debugfs_create_file("metrics", 385 0400, 386 fsc->client->debugfs_dir, 387 fsc, 388 &metric_fops); 389 390 fsc->debugfs_caps = debugfs_create_file("caps", 391 0400, 392 fsc->client->debugfs_dir, 393 fsc, 394 &caps_fops); 395 } 396 397 398 #else /* CONFIG_DEBUG_FS */ 399 400 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc) 401 { 402 } 403 404 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc) 405 { 406 } 407 408 #endif /* CONFIG_DEBUG_FS */ 409