1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include <linux/ceph/ceph_debug.h> 4 5 #include <linux/backing-dev.h> 6 #include <linux/ctype.h> 7 #include <linux/fs.h> 8 #include <linux/inet.h> 9 #include <linux/in6.h> 10 #include <linux/module.h> 11 #include <linux/mount.h> 12 #include <linux/fs_context.h> 13 #include <linux/fs_parser.h> 14 #include <linux/sched.h> 15 #include <linux/seq_file.h> 16 #include <linux/slab.h> 17 #include <linux/statfs.h> 18 #include <linux/string.h> 19 20 #include "super.h" 21 #include "mds_client.h" 22 #include "cache.h" 23 24 #include <linux/ceph/ceph_features.h> 25 #include <linux/ceph/decode.h> 26 #include <linux/ceph/mon_client.h> 27 #include <linux/ceph/auth.h> 28 #include <linux/ceph/debugfs.h> 29 30 static DEFINE_SPINLOCK(ceph_fsc_lock); 31 static LIST_HEAD(ceph_fsc_list); 32 33 /* 34 * Ceph superblock operations 35 * 36 * Handle the basics of mounting, unmounting. 37 */ 38 39 /* 40 * super ops 41 */ 42 static void ceph_put_super(struct super_block *s) 43 { 44 struct ceph_fs_client *fsc = ceph_sb_to_client(s); 45 46 dout("put_super\n"); 47 ceph_mdsc_close_sessions(fsc->mdsc); 48 } 49 50 static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) 51 { 52 struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry)); 53 struct ceph_mon_client *monc = &fsc->client->monc; 54 struct ceph_statfs st; 55 u64 fsid; 56 int err; 57 u64 data_pool; 58 59 if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) { 60 data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0]; 61 } else { 62 data_pool = CEPH_NOPOOL; 63 } 64 65 dout("statfs\n"); 66 err = ceph_monc_do_statfs(monc, data_pool, &st); 67 if (err < 0) 68 return err; 69 70 /* fill in kstatfs */ 71 buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ 72 73 /* 74 * express utilization in terms of large blocks to avoid 75 * overflow on 32-bit machines. 76 * 77 * NOTE: for the time being, we make bsize == frsize to humor 78 * not-yet-ancient versions of glibc that are broken. 79 * Someday, we will probably want to report a real block 80 * size... whatever that may mean for a network file system! 81 */ 82 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; 83 buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; 84 85 /* 86 * By default use root quota for stats; fallback to overall filesystem 87 * usage if using 'noquotadf' mount option or if the root dir doesn't 88 * have max_bytes quota set. 89 */ 90 if (ceph_test_mount_opt(fsc, NOQUOTADF) || 91 !ceph_quota_update_statfs(fsc, buf)) { 92 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); 93 buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); 94 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); 95 } 96 97 buf->f_files = le64_to_cpu(st.num_objects); 98 buf->f_ffree = -1; 99 buf->f_namelen = NAME_MAX; 100 101 /* Must convert the fsid, for consistent values across arches */ 102 mutex_lock(&monc->mutex); 103 fsid = le64_to_cpu(*(__le64 *)(&monc->monmap->fsid)) ^ 104 le64_to_cpu(*((__le64 *)&monc->monmap->fsid + 1)); 105 mutex_unlock(&monc->mutex); 106 107 buf->f_fsid = u64_to_fsid(fsid); 108 109 return 0; 110 } 111 112 static int ceph_sync_fs(struct super_block *sb, int wait) 113 { 114 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 115 116 if (!wait) { 117 dout("sync_fs (non-blocking)\n"); 118 ceph_flush_dirty_caps(fsc->mdsc); 119 dout("sync_fs (non-blocking) done\n"); 120 return 0; 121 } 122 123 dout("sync_fs (blocking)\n"); 124 ceph_osdc_sync(&fsc->client->osdc); 125 ceph_mdsc_sync(fsc->mdsc); 126 dout("sync_fs (blocking) done\n"); 127 return 0; 128 } 129 130 /* 131 * mount options 132 */ 133 enum { 134 Opt_wsize, 135 Opt_rsize, 136 Opt_rasize, 137 Opt_caps_wanted_delay_min, 138 Opt_caps_wanted_delay_max, 139 Opt_caps_max, 140 Opt_readdir_max_entries, 141 Opt_readdir_max_bytes, 142 Opt_congestion_kb, 143 /* int args above */ 144 Opt_snapdirname, 145 Opt_mds_namespace, 146 Opt_recover_session, 147 Opt_source, 148 /* string args above */ 149 Opt_dirstat, 150 Opt_rbytes, 151 Opt_asyncreaddir, 152 Opt_dcache, 153 Opt_ino32, 154 Opt_fscache, 155 Opt_poolperm, 156 Opt_require_active_mds, 157 Opt_acl, 158 Opt_quotadf, 159 Opt_copyfrom, 160 Opt_wsync, 161 }; 162 163 enum ceph_recover_session_mode { 164 ceph_recover_session_no, 165 ceph_recover_session_clean 166 }; 167 168 static const struct constant_table ceph_param_recover[] = { 169 { "no", ceph_recover_session_no }, 170 { "clean", ceph_recover_session_clean }, 171 {} 172 }; 173 174 static const struct fs_parameter_spec ceph_mount_parameters[] = { 175 fsparam_flag_no ("acl", Opt_acl), 176 fsparam_flag_no ("asyncreaddir", Opt_asyncreaddir), 177 fsparam_s32 ("caps_max", Opt_caps_max), 178 fsparam_u32 ("caps_wanted_delay_max", Opt_caps_wanted_delay_max), 179 fsparam_u32 ("caps_wanted_delay_min", Opt_caps_wanted_delay_min), 180 fsparam_u32 ("write_congestion_kb", Opt_congestion_kb), 181 fsparam_flag_no ("copyfrom", Opt_copyfrom), 182 fsparam_flag_no ("dcache", Opt_dcache), 183 fsparam_flag_no ("dirstat", Opt_dirstat), 184 fsparam_flag_no ("fsc", Opt_fscache), // fsc|nofsc 185 fsparam_string ("fsc", Opt_fscache), // fsc=... 186 fsparam_flag_no ("ino32", Opt_ino32), 187 fsparam_string ("mds_namespace", Opt_mds_namespace), 188 fsparam_flag_no ("poolperm", Opt_poolperm), 189 fsparam_flag_no ("quotadf", Opt_quotadf), 190 fsparam_u32 ("rasize", Opt_rasize), 191 fsparam_flag_no ("rbytes", Opt_rbytes), 192 fsparam_u32 ("readdir_max_bytes", Opt_readdir_max_bytes), 193 fsparam_u32 ("readdir_max_entries", Opt_readdir_max_entries), 194 fsparam_enum ("recover_session", Opt_recover_session, ceph_param_recover), 195 fsparam_flag_no ("require_active_mds", Opt_require_active_mds), 196 fsparam_u32 ("rsize", Opt_rsize), 197 fsparam_string ("snapdirname", Opt_snapdirname), 198 fsparam_string ("source", Opt_source), 199 fsparam_u32 ("wsize", Opt_wsize), 200 fsparam_flag_no ("wsync", Opt_wsync), 201 {} 202 }; 203 204 struct ceph_parse_opts_ctx { 205 struct ceph_options *copts; 206 struct ceph_mount_options *opts; 207 }; 208 209 /* 210 * Remove adjacent slashes and then the trailing slash, unless it is 211 * the only remaining character. 212 * 213 * E.g. "//dir1////dir2///" --> "/dir1/dir2", "///" --> "/". 214 */ 215 static void canonicalize_path(char *path) 216 { 217 int i, j = 0; 218 219 for (i = 0; path[i] != '\0'; i++) { 220 if (path[i] != '/' || j < 1 || path[j - 1] != '/') 221 path[j++] = path[i]; 222 } 223 224 if (j > 1 && path[j - 1] == '/') 225 j--; 226 path[j] = '\0'; 227 } 228 229 /* 230 * Parse the source parameter. Distinguish the server list from the path. 231 * 232 * The source will look like: 233 * <server_spec>[,<server_spec>...]:[<path>] 234 * where 235 * <server_spec> is <ip>[:<port>] 236 * <path> is optional, but if present must begin with '/' 237 */ 238 static int ceph_parse_source(struct fs_parameter *param, struct fs_context *fc) 239 { 240 struct ceph_parse_opts_ctx *pctx = fc->fs_private; 241 struct ceph_mount_options *fsopt = pctx->opts; 242 char *dev_name = param->string, *dev_name_end; 243 int ret; 244 245 dout("%s '%s'\n", __func__, dev_name); 246 if (!dev_name || !*dev_name) 247 return invalfc(fc, "Empty source"); 248 249 dev_name_end = strchr(dev_name, '/'); 250 if (dev_name_end) { 251 /* 252 * The server_path will include the whole chars from userland 253 * including the leading '/'. 254 */ 255 kfree(fsopt->server_path); 256 fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); 257 if (!fsopt->server_path) 258 return -ENOMEM; 259 260 canonicalize_path(fsopt->server_path); 261 } else { 262 dev_name_end = dev_name + strlen(dev_name); 263 } 264 265 dev_name_end--; /* back up to ':' separator */ 266 if (dev_name_end < dev_name || *dev_name_end != ':') 267 return invalfc(fc, "No path or : separator in source"); 268 269 dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); 270 if (fsopt->server_path) 271 dout("server path '%s'\n", fsopt->server_path); 272 273 ret = ceph_parse_mon_ips(param->string, dev_name_end - dev_name, 274 pctx->copts, fc->log.log); 275 if (ret) 276 return ret; 277 278 fc->source = param->string; 279 param->string = NULL; 280 return 0; 281 } 282 283 static int ceph_parse_mount_param(struct fs_context *fc, 284 struct fs_parameter *param) 285 { 286 struct ceph_parse_opts_ctx *pctx = fc->fs_private; 287 struct ceph_mount_options *fsopt = pctx->opts; 288 struct fs_parse_result result; 289 unsigned int mode; 290 int token, ret; 291 292 ret = ceph_parse_param(param, pctx->copts, fc->log.log); 293 if (ret != -ENOPARAM) 294 return ret; 295 296 token = fs_parse(fc, ceph_mount_parameters, param, &result); 297 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token); 298 if (token < 0) 299 return token; 300 301 switch (token) { 302 case Opt_snapdirname: 303 kfree(fsopt->snapdir_name); 304 fsopt->snapdir_name = param->string; 305 param->string = NULL; 306 break; 307 case Opt_mds_namespace: 308 kfree(fsopt->mds_namespace); 309 fsopt->mds_namespace = param->string; 310 param->string = NULL; 311 break; 312 case Opt_recover_session: 313 mode = result.uint_32; 314 if (mode == ceph_recover_session_no) 315 fsopt->flags &= ~CEPH_MOUNT_OPT_CLEANRECOVER; 316 else if (mode == ceph_recover_session_clean) 317 fsopt->flags |= CEPH_MOUNT_OPT_CLEANRECOVER; 318 else 319 BUG(); 320 break; 321 case Opt_source: 322 if (fc->source) 323 return invalfc(fc, "Multiple sources specified"); 324 return ceph_parse_source(param, fc); 325 case Opt_wsize: 326 if (result.uint_32 < PAGE_SIZE || 327 result.uint_32 > CEPH_MAX_WRITE_SIZE) 328 goto out_of_range; 329 fsopt->wsize = ALIGN(result.uint_32, PAGE_SIZE); 330 break; 331 case Opt_rsize: 332 if (result.uint_32 < PAGE_SIZE || 333 result.uint_32 > CEPH_MAX_READ_SIZE) 334 goto out_of_range; 335 fsopt->rsize = ALIGN(result.uint_32, PAGE_SIZE); 336 break; 337 case Opt_rasize: 338 fsopt->rasize = ALIGN(result.uint_32, PAGE_SIZE); 339 break; 340 case Opt_caps_wanted_delay_min: 341 if (result.uint_32 < 1) 342 goto out_of_range; 343 fsopt->caps_wanted_delay_min = result.uint_32; 344 break; 345 case Opt_caps_wanted_delay_max: 346 if (result.uint_32 < 1) 347 goto out_of_range; 348 fsopt->caps_wanted_delay_max = result.uint_32; 349 break; 350 case Opt_caps_max: 351 if (result.int_32 < 0) 352 goto out_of_range; 353 fsopt->caps_max = result.int_32; 354 break; 355 case Opt_readdir_max_entries: 356 if (result.uint_32 < 1) 357 goto out_of_range; 358 fsopt->max_readdir = result.uint_32; 359 break; 360 case Opt_readdir_max_bytes: 361 if (result.uint_32 < PAGE_SIZE && result.uint_32 != 0) 362 goto out_of_range; 363 fsopt->max_readdir_bytes = result.uint_32; 364 break; 365 case Opt_congestion_kb: 366 if (result.uint_32 < 1024) /* at least 1M */ 367 goto out_of_range; 368 fsopt->congestion_kb = result.uint_32; 369 break; 370 case Opt_dirstat: 371 if (!result.negated) 372 fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; 373 else 374 fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; 375 break; 376 case Opt_rbytes: 377 if (!result.negated) 378 fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; 379 else 380 fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; 381 break; 382 case Opt_asyncreaddir: 383 if (!result.negated) 384 fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; 385 else 386 fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; 387 break; 388 case Opt_dcache: 389 if (!result.negated) 390 fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; 391 else 392 fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; 393 break; 394 case Opt_ino32: 395 if (!result.negated) 396 fsopt->flags |= CEPH_MOUNT_OPT_INO32; 397 else 398 fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; 399 break; 400 401 case Opt_fscache: 402 #ifdef CONFIG_CEPH_FSCACHE 403 kfree(fsopt->fscache_uniq); 404 fsopt->fscache_uniq = NULL; 405 if (result.negated) { 406 fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; 407 } else { 408 fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; 409 fsopt->fscache_uniq = param->string; 410 param->string = NULL; 411 } 412 break; 413 #else 414 return invalfc(fc, "fscache support is disabled"); 415 #endif 416 case Opt_poolperm: 417 if (!result.negated) 418 fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; 419 else 420 fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; 421 break; 422 case Opt_require_active_mds: 423 if (!result.negated) 424 fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT; 425 else 426 fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT; 427 break; 428 case Opt_quotadf: 429 if (!result.negated) 430 fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF; 431 else 432 fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF; 433 break; 434 case Opt_copyfrom: 435 if (!result.negated) 436 fsopt->flags &= ~CEPH_MOUNT_OPT_NOCOPYFROM; 437 else 438 fsopt->flags |= CEPH_MOUNT_OPT_NOCOPYFROM; 439 break; 440 case Opt_acl: 441 if (!result.negated) { 442 #ifdef CONFIG_CEPH_FS_POSIX_ACL 443 fc->sb_flags |= SB_POSIXACL; 444 #else 445 return invalfc(fc, "POSIX ACL support is disabled"); 446 #endif 447 } else { 448 fc->sb_flags &= ~SB_POSIXACL; 449 } 450 break; 451 case Opt_wsync: 452 if (!result.negated) 453 fsopt->flags &= ~CEPH_MOUNT_OPT_ASYNC_DIROPS; 454 else 455 fsopt->flags |= CEPH_MOUNT_OPT_ASYNC_DIROPS; 456 break; 457 default: 458 BUG(); 459 } 460 return 0; 461 462 out_of_range: 463 return invalfc(fc, "%s out of range", param->key); 464 } 465 466 static void destroy_mount_options(struct ceph_mount_options *args) 467 { 468 dout("destroy_mount_options %p\n", args); 469 if (!args) 470 return; 471 472 kfree(args->snapdir_name); 473 kfree(args->mds_namespace); 474 kfree(args->server_path); 475 kfree(args->fscache_uniq); 476 kfree(args); 477 } 478 479 static int strcmp_null(const char *s1, const char *s2) 480 { 481 if (!s1 && !s2) 482 return 0; 483 if (s1 && !s2) 484 return -1; 485 if (!s1 && s2) 486 return 1; 487 return strcmp(s1, s2); 488 } 489 490 static int compare_mount_options(struct ceph_mount_options *new_fsopt, 491 struct ceph_options *new_opt, 492 struct ceph_fs_client *fsc) 493 { 494 struct ceph_mount_options *fsopt1 = new_fsopt; 495 struct ceph_mount_options *fsopt2 = fsc->mount_options; 496 int ofs = offsetof(struct ceph_mount_options, snapdir_name); 497 int ret; 498 499 ret = memcmp(fsopt1, fsopt2, ofs); 500 if (ret) 501 return ret; 502 503 ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); 504 if (ret) 505 return ret; 506 507 ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); 508 if (ret) 509 return ret; 510 511 ret = strcmp_null(fsopt1->server_path, fsopt2->server_path); 512 if (ret) 513 return ret; 514 515 ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq); 516 if (ret) 517 return ret; 518 519 return ceph_compare_options(new_opt, fsc->client); 520 } 521 522 /** 523 * ceph_show_options - Show mount options in /proc/mounts 524 * @m: seq_file to write to 525 * @root: root of that (sub)tree 526 */ 527 static int ceph_show_options(struct seq_file *m, struct dentry *root) 528 { 529 struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); 530 struct ceph_mount_options *fsopt = fsc->mount_options; 531 size_t pos; 532 int ret; 533 534 /* a comma between MNT/MS and client options */ 535 seq_putc(m, ','); 536 pos = m->count; 537 538 ret = ceph_print_client_options(m, fsc->client, false); 539 if (ret) 540 return ret; 541 542 /* retract our comma if no client options */ 543 if (m->count == pos) 544 m->count--; 545 546 if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) 547 seq_puts(m, ",dirstat"); 548 if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) 549 seq_puts(m, ",rbytes"); 550 if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) 551 seq_puts(m, ",noasyncreaddir"); 552 if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) 553 seq_puts(m, ",nodcache"); 554 if (fsopt->flags & CEPH_MOUNT_OPT_INO32) 555 seq_puts(m, ",ino32"); 556 if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) { 557 seq_show_option(m, "fsc", fsopt->fscache_uniq); 558 } 559 if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) 560 seq_puts(m, ",nopoolperm"); 561 if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF) 562 seq_puts(m, ",noquotadf"); 563 564 #ifdef CONFIG_CEPH_FS_POSIX_ACL 565 if (root->d_sb->s_flags & SB_POSIXACL) 566 seq_puts(m, ",acl"); 567 else 568 seq_puts(m, ",noacl"); 569 #endif 570 571 if ((fsopt->flags & CEPH_MOUNT_OPT_NOCOPYFROM) == 0) 572 seq_puts(m, ",copyfrom"); 573 574 if (fsopt->mds_namespace) 575 seq_show_option(m, "mds_namespace", fsopt->mds_namespace); 576 577 if (fsopt->flags & CEPH_MOUNT_OPT_CLEANRECOVER) 578 seq_show_option(m, "recover_session", "clean"); 579 580 if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS) 581 seq_puts(m, ",nowsync"); 582 583 if (fsopt->wsize != CEPH_MAX_WRITE_SIZE) 584 seq_printf(m, ",wsize=%u", fsopt->wsize); 585 if (fsopt->rsize != CEPH_MAX_READ_SIZE) 586 seq_printf(m, ",rsize=%u", fsopt->rsize); 587 if (fsopt->rasize != CEPH_RASIZE_DEFAULT) 588 seq_printf(m, ",rasize=%u", fsopt->rasize); 589 if (fsopt->congestion_kb != default_congestion_kb()) 590 seq_printf(m, ",write_congestion_kb=%u", fsopt->congestion_kb); 591 if (fsopt->caps_max) 592 seq_printf(m, ",caps_max=%d", fsopt->caps_max); 593 if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) 594 seq_printf(m, ",caps_wanted_delay_min=%u", 595 fsopt->caps_wanted_delay_min); 596 if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) 597 seq_printf(m, ",caps_wanted_delay_max=%u", 598 fsopt->caps_wanted_delay_max); 599 if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) 600 seq_printf(m, ",readdir_max_entries=%u", fsopt->max_readdir); 601 if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) 602 seq_printf(m, ",readdir_max_bytes=%u", fsopt->max_readdir_bytes); 603 if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) 604 seq_show_option(m, "snapdirname", fsopt->snapdir_name); 605 606 return 0; 607 } 608 609 /* 610 * handle any mon messages the standard library doesn't understand. 611 * return error if we don't either. 612 */ 613 static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) 614 { 615 struct ceph_fs_client *fsc = client->private; 616 int type = le16_to_cpu(msg->hdr.type); 617 618 switch (type) { 619 case CEPH_MSG_MDS_MAP: 620 ceph_mdsc_handle_mdsmap(fsc->mdsc, msg); 621 return 0; 622 case CEPH_MSG_FS_MAP_USER: 623 ceph_mdsc_handle_fsmap(fsc->mdsc, msg); 624 return 0; 625 default: 626 return -1; 627 } 628 } 629 630 /* 631 * create a new fs client 632 * 633 * Success or not, this function consumes @fsopt and @opt. 634 */ 635 static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, 636 struct ceph_options *opt) 637 { 638 struct ceph_fs_client *fsc; 639 int err; 640 641 fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); 642 if (!fsc) { 643 err = -ENOMEM; 644 goto fail; 645 } 646 647 fsc->client = ceph_create_client(opt, fsc); 648 if (IS_ERR(fsc->client)) { 649 err = PTR_ERR(fsc->client); 650 goto fail; 651 } 652 opt = NULL; /* fsc->client now owns this */ 653 654 fsc->client->extra_mon_dispatch = extra_mon_dispatch; 655 ceph_set_opt(fsc->client, ABORT_ON_FULL); 656 657 if (!fsopt->mds_namespace) { 658 ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, 659 0, true); 660 } else { 661 ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP, 662 0, false); 663 } 664 665 fsc->mount_options = fsopt; 666 667 fsc->sb = NULL; 668 fsc->mount_state = CEPH_MOUNT_MOUNTING; 669 fsc->filp_gen = 1; 670 fsc->have_copy_from2 = true; 671 672 atomic_long_set(&fsc->writeback_count, 0); 673 674 err = -ENOMEM; 675 /* 676 * The number of concurrent works can be high but they don't need 677 * to be processed in parallel, limit concurrency. 678 */ 679 fsc->inode_wq = alloc_workqueue("ceph-inode", WQ_UNBOUND, 0); 680 if (!fsc->inode_wq) 681 goto fail_client; 682 fsc->cap_wq = alloc_workqueue("ceph-cap", 0, 1); 683 if (!fsc->cap_wq) 684 goto fail_inode_wq; 685 686 spin_lock(&ceph_fsc_lock); 687 list_add_tail(&fsc->metric_wakeup, &ceph_fsc_list); 688 spin_unlock(&ceph_fsc_lock); 689 690 return fsc; 691 692 fail_inode_wq: 693 destroy_workqueue(fsc->inode_wq); 694 fail_client: 695 ceph_destroy_client(fsc->client); 696 fail: 697 kfree(fsc); 698 if (opt) 699 ceph_destroy_options(opt); 700 destroy_mount_options(fsopt); 701 return ERR_PTR(err); 702 } 703 704 static void flush_fs_workqueues(struct ceph_fs_client *fsc) 705 { 706 flush_workqueue(fsc->inode_wq); 707 flush_workqueue(fsc->cap_wq); 708 } 709 710 static void destroy_fs_client(struct ceph_fs_client *fsc) 711 { 712 dout("destroy_fs_client %p\n", fsc); 713 714 spin_lock(&ceph_fsc_lock); 715 list_del(&fsc->metric_wakeup); 716 spin_unlock(&ceph_fsc_lock); 717 718 ceph_mdsc_destroy(fsc); 719 destroy_workqueue(fsc->inode_wq); 720 destroy_workqueue(fsc->cap_wq); 721 722 destroy_mount_options(fsc->mount_options); 723 724 ceph_destroy_client(fsc->client); 725 726 kfree(fsc); 727 dout("destroy_fs_client %p done\n", fsc); 728 } 729 730 /* 731 * caches 732 */ 733 struct kmem_cache *ceph_inode_cachep; 734 struct kmem_cache *ceph_cap_cachep; 735 struct kmem_cache *ceph_cap_flush_cachep; 736 struct kmem_cache *ceph_dentry_cachep; 737 struct kmem_cache *ceph_file_cachep; 738 struct kmem_cache *ceph_dir_file_cachep; 739 struct kmem_cache *ceph_mds_request_cachep; 740 mempool_t *ceph_wb_pagevec_pool; 741 742 static void ceph_inode_init_once(void *foo) 743 { 744 struct ceph_inode_info *ci = foo; 745 inode_init_once(&ci->vfs_inode); 746 } 747 748 static int __init init_caches(void) 749 { 750 int error = -ENOMEM; 751 752 ceph_inode_cachep = kmem_cache_create("ceph_inode_info", 753 sizeof(struct ceph_inode_info), 754 __alignof__(struct ceph_inode_info), 755 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 756 SLAB_ACCOUNT, ceph_inode_init_once); 757 if (!ceph_inode_cachep) 758 return -ENOMEM; 759 760 ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD); 761 if (!ceph_cap_cachep) 762 goto bad_cap; 763 ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, 764 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); 765 if (!ceph_cap_flush_cachep) 766 goto bad_cap_flush; 767 768 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, 769 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); 770 if (!ceph_dentry_cachep) 771 goto bad_dentry; 772 773 ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD); 774 if (!ceph_file_cachep) 775 goto bad_file; 776 777 ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD); 778 if (!ceph_dir_file_cachep) 779 goto bad_dir_file; 780 781 ceph_mds_request_cachep = KMEM_CACHE(ceph_mds_request, SLAB_MEM_SPREAD); 782 if (!ceph_mds_request_cachep) 783 goto bad_mds_req; 784 785 ceph_wb_pagevec_pool = mempool_create_kmalloc_pool(10, CEPH_MAX_WRITE_SIZE >> PAGE_SHIFT); 786 if (!ceph_wb_pagevec_pool) 787 goto bad_pagevec_pool; 788 789 error = ceph_fscache_register(); 790 if (error) 791 goto bad_fscache; 792 793 return 0; 794 795 bad_fscache: 796 kmem_cache_destroy(ceph_mds_request_cachep); 797 bad_pagevec_pool: 798 mempool_destroy(ceph_wb_pagevec_pool); 799 bad_mds_req: 800 kmem_cache_destroy(ceph_dir_file_cachep); 801 bad_dir_file: 802 kmem_cache_destroy(ceph_file_cachep); 803 bad_file: 804 kmem_cache_destroy(ceph_dentry_cachep); 805 bad_dentry: 806 kmem_cache_destroy(ceph_cap_flush_cachep); 807 bad_cap_flush: 808 kmem_cache_destroy(ceph_cap_cachep); 809 bad_cap: 810 kmem_cache_destroy(ceph_inode_cachep); 811 return error; 812 } 813 814 static void destroy_caches(void) 815 { 816 /* 817 * Make sure all delayed rcu free inodes are flushed before we 818 * destroy cache. 819 */ 820 rcu_barrier(); 821 822 kmem_cache_destroy(ceph_inode_cachep); 823 kmem_cache_destroy(ceph_cap_cachep); 824 kmem_cache_destroy(ceph_cap_flush_cachep); 825 kmem_cache_destroy(ceph_dentry_cachep); 826 kmem_cache_destroy(ceph_file_cachep); 827 kmem_cache_destroy(ceph_dir_file_cachep); 828 kmem_cache_destroy(ceph_mds_request_cachep); 829 mempool_destroy(ceph_wb_pagevec_pool); 830 831 ceph_fscache_unregister(); 832 } 833 834 static void __ceph_umount_begin(struct ceph_fs_client *fsc) 835 { 836 ceph_osdc_abort_requests(&fsc->client->osdc, -EIO); 837 ceph_mdsc_force_umount(fsc->mdsc); 838 fsc->filp_gen++; // invalidate open files 839 } 840 841 /* 842 * ceph_umount_begin - initiate forced umount. Tear down the 843 * mount, skipping steps that may hang while waiting for server(s). 844 */ 845 static void ceph_umount_begin(struct super_block *sb) 846 { 847 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 848 849 dout("ceph_umount_begin - starting forced umount\n"); 850 if (!fsc) 851 return; 852 fsc->mount_state = CEPH_MOUNT_SHUTDOWN; 853 __ceph_umount_begin(fsc); 854 } 855 856 static const struct super_operations ceph_super_ops = { 857 .alloc_inode = ceph_alloc_inode, 858 .free_inode = ceph_free_inode, 859 .write_inode = ceph_write_inode, 860 .drop_inode = generic_delete_inode, 861 .evict_inode = ceph_evict_inode, 862 .sync_fs = ceph_sync_fs, 863 .put_super = ceph_put_super, 864 .show_options = ceph_show_options, 865 .statfs = ceph_statfs, 866 .umount_begin = ceph_umount_begin, 867 }; 868 869 /* 870 * Bootstrap mount by opening the root directory. Note the mount 871 * @started time from caller, and time out if this takes too long. 872 */ 873 static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, 874 const char *path, 875 unsigned long started) 876 { 877 struct ceph_mds_client *mdsc = fsc->mdsc; 878 struct ceph_mds_request *req = NULL; 879 int err; 880 struct dentry *root; 881 882 /* open dir */ 883 dout("open_root_inode opening '%s'\n", path); 884 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); 885 if (IS_ERR(req)) 886 return ERR_CAST(req); 887 req->r_path1 = kstrdup(path, GFP_NOFS); 888 if (!req->r_path1) { 889 root = ERR_PTR(-ENOMEM); 890 goto out; 891 } 892 893 req->r_ino1.ino = CEPH_INO_ROOT; 894 req->r_ino1.snap = CEPH_NOSNAP; 895 req->r_started = started; 896 req->r_timeout = fsc->client->options->mount_timeout; 897 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); 898 req->r_num_caps = 2; 899 err = ceph_mdsc_do_request(mdsc, NULL, req); 900 if (err == 0) { 901 struct inode *inode = req->r_target_inode; 902 req->r_target_inode = NULL; 903 dout("open_root_inode success\n"); 904 root = d_make_root(inode); 905 if (!root) { 906 root = ERR_PTR(-ENOMEM); 907 goto out; 908 } 909 dout("open_root_inode success, root dentry is %p\n", root); 910 } else { 911 root = ERR_PTR(err); 912 } 913 out: 914 ceph_mdsc_put_request(req); 915 return root; 916 } 917 918 /* 919 * mount: join the ceph cluster, and open root directory. 920 */ 921 static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, 922 struct fs_context *fc) 923 { 924 int err; 925 unsigned long started = jiffies; /* note the start time */ 926 struct dentry *root; 927 928 dout("mount start %p\n", fsc); 929 mutex_lock(&fsc->client->mount_mutex); 930 931 if (!fsc->sb->s_root) { 932 const char *path = fsc->mount_options->server_path ? 933 fsc->mount_options->server_path + 1 : ""; 934 935 err = __ceph_open_session(fsc->client, started); 936 if (err < 0) 937 goto out; 938 939 /* setup fscache */ 940 if (fsc->mount_options->flags & CEPH_MOUNT_OPT_FSCACHE) { 941 err = ceph_fscache_register_fs(fsc, fc); 942 if (err < 0) 943 goto out; 944 } 945 946 dout("mount opening path '%s'\n", path); 947 948 ceph_fs_debugfs_init(fsc); 949 950 root = open_root_dentry(fsc, path, started); 951 if (IS_ERR(root)) { 952 err = PTR_ERR(root); 953 goto out; 954 } 955 fsc->sb->s_root = dget(root); 956 } else { 957 root = dget(fsc->sb->s_root); 958 } 959 960 fsc->mount_state = CEPH_MOUNT_MOUNTED; 961 dout("mount success\n"); 962 mutex_unlock(&fsc->client->mount_mutex); 963 return root; 964 965 out: 966 mutex_unlock(&fsc->client->mount_mutex); 967 return ERR_PTR(err); 968 } 969 970 static int ceph_set_super(struct super_block *s, struct fs_context *fc) 971 { 972 struct ceph_fs_client *fsc = s->s_fs_info; 973 int ret; 974 975 dout("set_super %p\n", s); 976 977 s->s_maxbytes = MAX_LFS_FILESIZE; 978 979 s->s_xattr = ceph_xattr_handlers; 980 fsc->sb = s; 981 fsc->max_file_size = 1ULL << 40; /* temp value until we get mdsmap */ 982 983 s->s_op = &ceph_super_ops; 984 s->s_d_op = &ceph_dentry_ops; 985 s->s_export_op = &ceph_export_ops; 986 987 s->s_time_gran = 1; 988 s->s_time_min = 0; 989 s->s_time_max = U32_MAX; 990 991 ret = set_anon_super_fc(s, fc); 992 if (ret != 0) 993 fsc->sb = NULL; 994 return ret; 995 } 996 997 /* 998 * share superblock if same fs AND options 999 */ 1000 static int ceph_compare_super(struct super_block *sb, struct fs_context *fc) 1001 { 1002 struct ceph_fs_client *new = fc->s_fs_info; 1003 struct ceph_mount_options *fsopt = new->mount_options; 1004 struct ceph_options *opt = new->client->options; 1005 struct ceph_fs_client *other = ceph_sb_to_client(sb); 1006 1007 dout("ceph_compare_super %p\n", sb); 1008 1009 if (compare_mount_options(fsopt, opt, other)) { 1010 dout("monitor(s)/mount options don't match\n"); 1011 return 0; 1012 } 1013 if ((opt->flags & CEPH_OPT_FSID) && 1014 ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { 1015 dout("fsid doesn't match\n"); 1016 return 0; 1017 } 1018 if (fc->sb_flags != (sb->s_flags & ~SB_BORN)) { 1019 dout("flags differ\n"); 1020 return 0; 1021 } 1022 return 1; 1023 } 1024 1025 /* 1026 * construct our own bdi so we can control readahead, etc. 1027 */ 1028 static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); 1029 1030 static int ceph_setup_bdi(struct super_block *sb, struct ceph_fs_client *fsc) 1031 { 1032 int err; 1033 1034 err = super_setup_bdi_name(sb, "ceph-%ld", 1035 atomic_long_inc_return(&bdi_seq)); 1036 if (err) 1037 return err; 1038 1039 /* set ra_pages based on rasize mount option? */ 1040 sb->s_bdi->ra_pages = fsc->mount_options->rasize >> PAGE_SHIFT; 1041 1042 /* set io_pages based on max osd read size */ 1043 sb->s_bdi->io_pages = fsc->mount_options->rsize >> PAGE_SHIFT; 1044 1045 return 0; 1046 } 1047 1048 static int ceph_get_tree(struct fs_context *fc) 1049 { 1050 struct ceph_parse_opts_ctx *pctx = fc->fs_private; 1051 struct super_block *sb; 1052 struct ceph_fs_client *fsc; 1053 struct dentry *res; 1054 int (*compare_super)(struct super_block *, struct fs_context *) = 1055 ceph_compare_super; 1056 int err; 1057 1058 dout("ceph_get_tree\n"); 1059 1060 if (!fc->source) 1061 return invalfc(fc, "No source"); 1062 1063 /* create client (which we may/may not use) */ 1064 fsc = create_fs_client(pctx->opts, pctx->copts); 1065 pctx->opts = NULL; 1066 pctx->copts = NULL; 1067 if (IS_ERR(fsc)) { 1068 err = PTR_ERR(fsc); 1069 goto out_final; 1070 } 1071 1072 err = ceph_mdsc_init(fsc); 1073 if (err < 0) 1074 goto out; 1075 1076 if (ceph_test_opt(fsc->client, NOSHARE)) 1077 compare_super = NULL; 1078 1079 fc->s_fs_info = fsc; 1080 sb = sget_fc(fc, compare_super, ceph_set_super); 1081 fc->s_fs_info = NULL; 1082 if (IS_ERR(sb)) { 1083 err = PTR_ERR(sb); 1084 goto out; 1085 } 1086 1087 if (ceph_sb_to_client(sb) != fsc) { 1088 destroy_fs_client(fsc); 1089 fsc = ceph_sb_to_client(sb); 1090 dout("get_sb got existing client %p\n", fsc); 1091 } else { 1092 dout("get_sb using new client %p\n", fsc); 1093 err = ceph_setup_bdi(sb, fsc); 1094 if (err < 0) 1095 goto out_splat; 1096 } 1097 1098 res = ceph_real_mount(fsc, fc); 1099 if (IS_ERR(res)) { 1100 err = PTR_ERR(res); 1101 goto out_splat; 1102 } 1103 dout("root %p inode %p ino %llx.%llx\n", res, 1104 d_inode(res), ceph_vinop(d_inode(res))); 1105 fc->root = fsc->sb->s_root; 1106 return 0; 1107 1108 out_splat: 1109 if (!ceph_mdsmap_is_cluster_available(fsc->mdsc->mdsmap)) { 1110 pr_info("No mds server is up or the cluster is laggy\n"); 1111 err = -EHOSTUNREACH; 1112 } 1113 1114 ceph_mdsc_close_sessions(fsc->mdsc); 1115 deactivate_locked_super(sb); 1116 goto out_final; 1117 1118 out: 1119 destroy_fs_client(fsc); 1120 out_final: 1121 dout("ceph_get_tree fail %d\n", err); 1122 return err; 1123 } 1124 1125 static void ceph_free_fc(struct fs_context *fc) 1126 { 1127 struct ceph_parse_opts_ctx *pctx = fc->fs_private; 1128 1129 if (pctx) { 1130 destroy_mount_options(pctx->opts); 1131 ceph_destroy_options(pctx->copts); 1132 kfree(pctx); 1133 } 1134 } 1135 1136 static int ceph_reconfigure_fc(struct fs_context *fc) 1137 { 1138 struct ceph_parse_opts_ctx *pctx = fc->fs_private; 1139 struct ceph_mount_options *fsopt = pctx->opts; 1140 struct ceph_fs_client *fsc = ceph_sb_to_client(fc->root->d_sb); 1141 1142 if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS) 1143 ceph_set_mount_opt(fsc, ASYNC_DIROPS); 1144 else 1145 ceph_clear_mount_opt(fsc, ASYNC_DIROPS); 1146 1147 sync_filesystem(fc->root->d_sb); 1148 return 0; 1149 } 1150 1151 static const struct fs_context_operations ceph_context_ops = { 1152 .free = ceph_free_fc, 1153 .parse_param = ceph_parse_mount_param, 1154 .get_tree = ceph_get_tree, 1155 .reconfigure = ceph_reconfigure_fc, 1156 }; 1157 1158 /* 1159 * Set up the filesystem mount context. 1160 */ 1161 static int ceph_init_fs_context(struct fs_context *fc) 1162 { 1163 struct ceph_parse_opts_ctx *pctx; 1164 struct ceph_mount_options *fsopt; 1165 1166 pctx = kzalloc(sizeof(*pctx), GFP_KERNEL); 1167 if (!pctx) 1168 return -ENOMEM; 1169 1170 pctx->copts = ceph_alloc_options(); 1171 if (!pctx->copts) 1172 goto nomem; 1173 1174 pctx->opts = kzalloc(sizeof(*pctx->opts), GFP_KERNEL); 1175 if (!pctx->opts) 1176 goto nomem; 1177 1178 fsopt = pctx->opts; 1179 fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; 1180 1181 fsopt->wsize = CEPH_MAX_WRITE_SIZE; 1182 fsopt->rsize = CEPH_MAX_READ_SIZE; 1183 fsopt->rasize = CEPH_RASIZE_DEFAULT; 1184 fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); 1185 if (!fsopt->snapdir_name) 1186 goto nomem; 1187 1188 fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; 1189 fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; 1190 fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; 1191 fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; 1192 fsopt->congestion_kb = default_congestion_kb(); 1193 1194 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1195 fc->sb_flags |= SB_POSIXACL; 1196 #endif 1197 1198 fc->fs_private = pctx; 1199 fc->ops = &ceph_context_ops; 1200 return 0; 1201 1202 nomem: 1203 destroy_mount_options(pctx->opts); 1204 ceph_destroy_options(pctx->copts); 1205 kfree(pctx); 1206 return -ENOMEM; 1207 } 1208 1209 static void ceph_kill_sb(struct super_block *s) 1210 { 1211 struct ceph_fs_client *fsc = ceph_sb_to_client(s); 1212 1213 dout("kill_sb %p\n", s); 1214 1215 ceph_mdsc_pre_umount(fsc->mdsc); 1216 flush_fs_workqueues(fsc); 1217 1218 kill_anon_super(s); 1219 1220 fsc->client->extra_mon_dispatch = NULL; 1221 ceph_fs_debugfs_cleanup(fsc); 1222 1223 ceph_fscache_unregister_fs(fsc); 1224 1225 destroy_fs_client(fsc); 1226 } 1227 1228 static struct file_system_type ceph_fs_type = { 1229 .owner = THIS_MODULE, 1230 .name = "ceph", 1231 .init_fs_context = ceph_init_fs_context, 1232 .kill_sb = ceph_kill_sb, 1233 .fs_flags = FS_RENAME_DOES_D_MOVE, 1234 }; 1235 MODULE_ALIAS_FS("ceph"); 1236 1237 int ceph_force_reconnect(struct super_block *sb) 1238 { 1239 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 1240 int err = 0; 1241 1242 fsc->mount_state = CEPH_MOUNT_RECOVER; 1243 __ceph_umount_begin(fsc); 1244 1245 /* Make sure all page caches get invalidated. 1246 * see remove_session_caps_cb() */ 1247 flush_workqueue(fsc->inode_wq); 1248 1249 /* In case that we were blocklisted. This also reset 1250 * all mon/osd connections */ 1251 ceph_reset_client_addr(fsc->client); 1252 1253 ceph_osdc_clear_abort_err(&fsc->client->osdc); 1254 1255 fsc->blocklisted = false; 1256 fsc->mount_state = CEPH_MOUNT_MOUNTED; 1257 1258 if (sb->s_root) { 1259 err = __ceph_do_getattr(d_inode(sb->s_root), NULL, 1260 CEPH_STAT_CAP_INODE, true); 1261 } 1262 return err; 1263 } 1264 1265 static int __init init_ceph(void) 1266 { 1267 int ret = init_caches(); 1268 if (ret) 1269 goto out; 1270 1271 ceph_flock_init(); 1272 ret = register_filesystem(&ceph_fs_type); 1273 if (ret) 1274 goto out_caches; 1275 1276 pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); 1277 1278 return 0; 1279 1280 out_caches: 1281 destroy_caches(); 1282 out: 1283 return ret; 1284 } 1285 1286 static void __exit exit_ceph(void) 1287 { 1288 dout("exit_ceph\n"); 1289 unregister_filesystem(&ceph_fs_type); 1290 destroy_caches(); 1291 } 1292 1293 static int param_set_metrics(const char *val, const struct kernel_param *kp) 1294 { 1295 struct ceph_fs_client *fsc; 1296 int ret; 1297 1298 ret = param_set_bool(val, kp); 1299 if (ret) { 1300 pr_err("Failed to parse sending metrics switch value '%s'\n", 1301 val); 1302 return ret; 1303 } else if (!disable_send_metrics) { 1304 // wake up all the mds clients 1305 spin_lock(&ceph_fsc_lock); 1306 list_for_each_entry(fsc, &ceph_fsc_list, metric_wakeup) { 1307 metric_schedule_delayed(&fsc->mdsc->metric); 1308 } 1309 spin_unlock(&ceph_fsc_lock); 1310 } 1311 1312 return 0; 1313 } 1314 1315 static const struct kernel_param_ops param_ops_metrics = { 1316 .set = param_set_metrics, 1317 .get = param_get_bool, 1318 }; 1319 1320 bool disable_send_metrics = false; 1321 module_param_cb(disable_send_metrics, ¶m_ops_metrics, &disable_send_metrics, 0644); 1322 MODULE_PARM_DESC(disable_send_metrics, "Enable sending perf metrics to ceph cluster (default: on)"); 1323 1324 module_init(init_ceph); 1325 module_exit(exit_ceph); 1326 1327 MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); 1328 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); 1329 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); 1330 MODULE_DESCRIPTION("Ceph filesystem for Linux"); 1331 MODULE_LICENSE("GPL"); 1332