1 /* 2 * Copyright (c) 2011-2020 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@dragonflybsd.org> 6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 /* 36 * Ioctl Functions. 37 * 38 * WARNING! The ioctl functions which manipulate the connection state need 39 * to be able to run without deadlock on the volume's chain lock. 40 * Most of these functions use a separate lock. 41 */ 42 43 #include "hammer2.h" 44 45 #include <sys/kern_syscall.h> 46 47 static int hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data); 48 static int hammer2_ioctl_recluster(hammer2_inode_t *ip, void *data); 49 static int hammer2_ioctl_remote_scan(hammer2_inode_t *ip, void *data); 50 static int hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data); 51 static int hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data); 52 static int hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data); 53 static int hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data); 54 static int hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data); 55 static int hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data); 56 static int hammer2_ioctl_pfs_lookup(hammer2_inode_t *ip, void *data); 57 static int hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data); 58 static int hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data); 59 static int hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data); 60 static int hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data); 61 static int hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data); 62 static int hammer2_ioctl_debug_dump(hammer2_inode_t *ip, u_int flags); 63 static int hammer2_ioctl_emerg_mode(hammer2_inode_t *ip, u_int mode); 64 static int hammer2_ioctl_growfs(hammer2_inode_t *ip, void *data, 65 struct ucred *cred); 66 //static int hammer2_ioctl_inode_comp_set(hammer2_inode_t *ip, void *data); 67 //static int hammer2_ioctl_inode_comp_rec_set(hammer2_inode_t *ip, void *data); 68 //static int hammer2_ioctl_inode_comp_rec_set2(hammer2_inode_t *ip, void *data); 69 static int hammer2_ioctl_bulkfree_scan(hammer2_inode_t *ip, void *data); 70 static int hammer2_ioctl_destroy(hammer2_inode_t *ip, void *data); 71 static int hammer2_ioctl_volume_list(hammer2_inode_t *ip, void *data); 72 73 int 74 hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, int fflag, 75 struct ucred *cred) 76 { 77 int error; 78 79 /* 80 * Standard root cred checks, will be selectively ignored below 81 * for ioctls that do not require root creds. 82 */ 83 error = priv_check_cred(cred, PRIV_HAMMER_IOCTL, 0); 84 85 switch(com) { 86 case HAMMER2IOC_VERSION_GET: 87 error = hammer2_ioctl_version_get(ip, data); 88 break; 89 case HAMMER2IOC_RECLUSTER: 90 if (error == 0) 91 error = hammer2_ioctl_recluster(ip, data); 92 break; 93 case HAMMER2IOC_REMOTE_SCAN: 94 if (error == 0) 95 error = hammer2_ioctl_remote_scan(ip, data); 96 break; 97 case HAMMER2IOC_REMOTE_ADD: 98 if (error == 0) 99 error = hammer2_ioctl_remote_add(ip, data); 100 break; 101 case HAMMER2IOC_REMOTE_DEL: 102 if (error == 0) 103 error = hammer2_ioctl_remote_del(ip, data); 104 break; 105 case HAMMER2IOC_REMOTE_REP: 106 if (error == 0) 107 error = hammer2_ioctl_remote_rep(ip, data); 108 break; 109 case HAMMER2IOC_SOCKET_GET: 110 if (error == 0) 111 error = hammer2_ioctl_socket_get(ip, data); 112 break; 113 case HAMMER2IOC_SOCKET_SET: 114 if (error == 0) 115 error = hammer2_ioctl_socket_set(ip, data); 116 break; 117 case HAMMER2IOC_PFS_GET: 118 if (error == 0) 119 error = hammer2_ioctl_pfs_get(ip, data); 120 break; 121 case HAMMER2IOC_PFS_LOOKUP: 122 if (error == 0) 123 error = hammer2_ioctl_pfs_lookup(ip, data); 124 break; 125 case HAMMER2IOC_PFS_CREATE: 126 if (error == 0) 127 error = hammer2_ioctl_pfs_create(ip, data); 128 break; 129 case HAMMER2IOC_PFS_DELETE: 130 if (error == 0) 131 error = hammer2_ioctl_pfs_delete(ip, data); 132 break; 133 case HAMMER2IOC_PFS_SNAPSHOT: 134 if (error == 0) 135 error = hammer2_ioctl_pfs_snapshot(ip, data); 136 break; 137 case HAMMER2IOC_INODE_GET: 138 error = hammer2_ioctl_inode_get(ip, data); 139 break; 140 case HAMMER2IOC_INODE_SET: 141 if (error == 0) 142 error = hammer2_ioctl_inode_set(ip, data); 143 break; 144 case HAMMER2IOC_BULKFREE_SCAN: 145 error = hammer2_ioctl_bulkfree_scan(ip, data); 146 break; 147 case HAMMER2IOC_BULKFREE_ASYNC: 148 error = hammer2_ioctl_bulkfree_scan(ip, NULL); 149 break; 150 case HAMMER2IOC_DESTROY: 151 if (error == 0) 152 error = hammer2_ioctl_destroy(ip, data); 153 break; 154 case HAMMER2IOC_DEBUG_DUMP: 155 error = hammer2_ioctl_debug_dump(ip, *(u_int *)data); 156 break; 157 case HAMMER2IOC_EMERG_MODE: 158 if (error == 0) 159 error = hammer2_ioctl_emerg_mode(ip, *(u_int *)data); 160 break; 161 case HAMMER2IOC_GROWFS: 162 if (error == 0) 163 error = hammer2_ioctl_growfs(ip, data, cred); 164 break; 165 case HAMMER2IOC_VOLUME_LIST: 166 if (error == 0) 167 error = hammer2_ioctl_volume_list(ip, data); 168 break; 169 default: 170 error = EOPNOTSUPP; 171 break; 172 } 173 return (error); 174 } 175 176 /* 177 * Retrieve version and basic info 178 */ 179 static int 180 hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data) 181 { 182 hammer2_ioc_version_t *version = data; 183 hammer2_dev_t *hmp; 184 185 hmp = ip->pmp->pfs_hmps[0]; 186 if (hmp) 187 version->version = hmp->voldata.version; 188 else 189 version->version = -1; 190 return 0; 191 } 192 193 static int 194 hammer2_ioctl_recluster(hammer2_inode_t *ip, void *data) 195 { 196 hammer2_ioc_recluster_t *recl = data; 197 struct vnode *vproot; 198 struct file *fp; 199 hammer2_cluster_t *cluster; 200 int error; 201 202 fp = holdfp(curthread, recl->fd, -1); 203 if (fp) { 204 error = VFS_ROOT(ip->pmp->mp, &vproot); 205 if (error == 0) { 206 cluster = &ip->pmp->iroot->cluster; 207 kprintf("reconnect to cluster: nc=%d focus=%p\n", 208 cluster->nchains, cluster->focus); 209 if (cluster->nchains != 1 || cluster->focus == NULL) { 210 kprintf("not a local device mount\n"); 211 error = EINVAL; 212 } else { 213 hammer2_cluster_reconnect(cluster->focus->hmp, 214 fp); 215 kprintf("ok\n"); 216 error = 0; 217 } 218 vput(vproot); 219 } 220 } else { 221 error = EINVAL; 222 } 223 return error; 224 } 225 226 /* 227 * Retrieve information about a remote 228 */ 229 static int 230 hammer2_ioctl_remote_scan(hammer2_inode_t *ip, void *data) 231 { 232 hammer2_dev_t *hmp; 233 hammer2_ioc_remote_t *remote = data; 234 int copyid = remote->copyid; 235 236 hmp = ip->pmp->pfs_hmps[0]; 237 if (hmp == NULL) 238 return (EINVAL); 239 240 if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) 241 return (EINVAL); 242 243 hammer2_voldata_lock(hmp); 244 remote->copy1 = hmp->voldata.copyinfo[copyid]; 245 hammer2_voldata_unlock(hmp); 246 247 /* 248 * Adjust nextid (GET only) 249 */ 250 while (++copyid < HAMMER2_COPYID_COUNT && 251 hmp->voldata.copyinfo[copyid].copyid == 0) { 252 ; 253 } 254 if (copyid == HAMMER2_COPYID_COUNT) 255 remote->nextid = -1; 256 else 257 remote->nextid = copyid; 258 259 return(0); 260 } 261 262 /* 263 * Add new remote entry 264 */ 265 static int 266 hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data) 267 { 268 hammer2_ioc_remote_t *remote = data; 269 hammer2_pfs_t *pmp = ip->pmp; 270 hammer2_dev_t *hmp; 271 int copyid = remote->copyid; 272 int error = 0; 273 274 hmp = pmp->pfs_hmps[0]; 275 if (hmp == NULL) 276 return (EINVAL); 277 if (copyid >= HAMMER2_COPYID_COUNT) 278 return (EINVAL); 279 280 hammer2_voldata_lock(hmp); 281 if (copyid < 0) { 282 for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { 283 if (hmp->voldata.copyinfo[copyid].copyid == 0) 284 break; 285 } 286 if (copyid == HAMMER2_COPYID_COUNT) { 287 error = ENOSPC; 288 goto failed; 289 } 290 } 291 hammer2_voldata_modify(hmp); 292 remote->copy1.copyid = copyid; 293 hmp->voldata.copyinfo[copyid] = remote->copy1; 294 hammer2_volconf_update(hmp, copyid); 295 failed: 296 hammer2_voldata_unlock(hmp); 297 return (error); 298 } 299 300 /* 301 * Delete existing remote entry 302 */ 303 static int 304 hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data) 305 { 306 hammer2_ioc_remote_t *remote = data; 307 hammer2_pfs_t *pmp = ip->pmp; 308 hammer2_dev_t *hmp; 309 int copyid = remote->copyid; 310 int error = 0; 311 312 hmp = pmp->pfs_hmps[0]; 313 if (hmp == NULL) 314 return (EINVAL); 315 if (copyid >= HAMMER2_COPYID_COUNT) 316 return (EINVAL); 317 remote->copy1.path[sizeof(remote->copy1.path) - 1] = 0; 318 hammer2_voldata_lock(hmp); 319 if (copyid < 0) { 320 for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { 321 if (hmp->voldata.copyinfo[copyid].copyid == 0) 322 continue; 323 if (strcmp(remote->copy1.path, 324 hmp->voldata.copyinfo[copyid].path) == 0) { 325 break; 326 } 327 } 328 if (copyid == HAMMER2_COPYID_COUNT) { 329 error = ENOENT; 330 goto failed; 331 } 332 } 333 hammer2_voldata_modify(hmp); 334 hmp->voldata.copyinfo[copyid].copyid = 0; 335 hammer2_volconf_update(hmp, copyid); 336 failed: 337 hammer2_voldata_unlock(hmp); 338 return (error); 339 } 340 341 /* 342 * Replace existing remote entry 343 */ 344 static int 345 hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data) 346 { 347 hammer2_ioc_remote_t *remote = data; 348 hammer2_dev_t *hmp; 349 int copyid = remote->copyid; 350 351 hmp = ip->pmp->pfs_hmps[0]; 352 if (hmp == NULL) 353 return (EINVAL); 354 if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) 355 return (EINVAL); 356 357 hammer2_voldata_lock(hmp); 358 hammer2_voldata_modify(hmp); 359 /*hammer2_volconf_update(hmp, copyid);*/ 360 hammer2_voldata_unlock(hmp); 361 362 return(0); 363 } 364 365 /* 366 * Retrieve communications socket 367 */ 368 static int 369 hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data) 370 { 371 return (EOPNOTSUPP); 372 } 373 374 /* 375 * Set communications socket for connection 376 */ 377 static int 378 hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data) 379 { 380 hammer2_ioc_remote_t *remote = data; 381 hammer2_dev_t *hmp; 382 int copyid = remote->copyid; 383 384 hmp = ip->pmp->pfs_hmps[0]; 385 if (hmp == NULL) 386 return (EINVAL); 387 if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) 388 return (EINVAL); 389 390 hammer2_voldata_lock(hmp); 391 hammer2_voldata_unlock(hmp); 392 393 return(0); 394 } 395 396 /* 397 * Used to scan and retrieve PFS information. PFS's are directories under 398 * the super-root. 399 * 400 * To scan PFSs pass name_key=0. The function will scan for the next 401 * PFS and set all fields, as well as set name_next to the next key. 402 * When no PFSs remain, name_next is set to (hammer2_key_t)-1. 403 * 404 * To retrieve a particular PFS by key, specify the key but note that 405 * the ioctl will return the lowest key >= specified_key, so the caller 406 * must verify the key. 407 * 408 * To retrieve the PFS associated with the file descriptor, pass 409 * name_key set to (hammer2_key_t)-1. 410 */ 411 static int 412 hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data) 413 { 414 const hammer2_inode_data_t *ripdata; 415 hammer2_dev_t *hmp; 416 hammer2_ioc_pfs_t *pfs; 417 hammer2_chain_t *parent; 418 hammer2_chain_t *chain; 419 hammer2_key_t key_next; 420 hammer2_key_t save_key; 421 int error; 422 423 hmp = ip->pmp->pfs_hmps[0]; 424 if (hmp == NULL) 425 return (EINVAL); 426 427 pfs = data; 428 save_key = pfs->name_key; 429 error = 0; 430 431 /* 432 * Setup 433 */ 434 if (save_key == (hammer2_key_t)-1) { 435 hammer2_inode_lock(ip->pmp->iroot, 0); 436 parent = NULL; 437 chain = hammer2_inode_chain(ip->pmp->iroot, 0, 438 HAMMER2_RESOLVE_ALWAYS | 439 HAMMER2_RESOLVE_SHARED); 440 } else { 441 hammer2_inode_lock(hmp->spmp->iroot, 0); 442 parent = hammer2_inode_chain(hmp->spmp->iroot, 0, 443 HAMMER2_RESOLVE_ALWAYS | 444 HAMMER2_RESOLVE_SHARED); 445 chain = hammer2_chain_lookup(&parent, &key_next, 446 pfs->name_key, HAMMER2_KEY_MAX, 447 &error, 448 HAMMER2_LOOKUP_SHARED); 449 } 450 451 /* 452 * Locate next PFS 453 */ 454 while (chain) { 455 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) 456 break; 457 if (parent == NULL) { 458 hammer2_chain_unlock(chain); 459 hammer2_chain_drop(chain); 460 chain = NULL; 461 break; 462 } 463 chain = hammer2_chain_next(&parent, chain, &key_next, 464 key_next, HAMMER2_KEY_MAX, 465 &error, 466 HAMMER2_LOOKUP_SHARED); 467 } 468 error = hammer2_error_to_errno(error); 469 470 /* 471 * Load the data being returned by the ioctl. 472 */ 473 if (chain && chain->error == 0) { 474 ripdata = &chain->data->ipdata; 475 pfs->name_key = ripdata->meta.name_key; 476 pfs->pfs_type = ripdata->meta.pfs_type; 477 pfs->pfs_subtype = ripdata->meta.pfs_subtype; 478 pfs->pfs_clid = ripdata->meta.pfs_clid; 479 pfs->pfs_fsid = ripdata->meta.pfs_fsid; 480 KKASSERT(ripdata->meta.name_len < sizeof(pfs->name)); 481 bcopy(ripdata->filename, pfs->name, ripdata->meta.name_len); 482 pfs->name[ripdata->meta.name_len] = 0; 483 ripdata = NULL; /* safety */ 484 485 /* 486 * Calculate name_next, if any. We are only accessing 487 * chain->bref so we can ignore chain->error (if the key 488 * is used later it will error then). 489 */ 490 if (parent == NULL) { 491 pfs->name_next = (hammer2_key_t)-1; 492 } else { 493 chain = hammer2_chain_next(&parent, chain, &key_next, 494 key_next, HAMMER2_KEY_MAX, 495 &error, 496 HAMMER2_LOOKUP_SHARED); 497 if (chain) 498 pfs->name_next = chain->bref.key; 499 else 500 pfs->name_next = (hammer2_key_t)-1; 501 } 502 } else { 503 pfs->name_next = (hammer2_key_t)-1; 504 error = ENOENT; 505 } 506 507 /* 508 * Cleanup 509 */ 510 if (chain) { 511 hammer2_chain_unlock(chain); 512 hammer2_chain_drop(chain); 513 } 514 if (parent) { 515 hammer2_chain_unlock(parent); 516 hammer2_chain_drop(parent); 517 } 518 if (save_key == (hammer2_key_t)-1) { 519 hammer2_inode_unlock(ip->pmp->iroot); 520 } else { 521 hammer2_inode_unlock(hmp->spmp->iroot); 522 } 523 524 return (error); 525 } 526 527 /* 528 * Find a specific PFS by name 529 */ 530 static int 531 hammer2_ioctl_pfs_lookup(hammer2_inode_t *ip, void *data) 532 { 533 const hammer2_inode_data_t *ripdata; 534 hammer2_dev_t *hmp; 535 hammer2_ioc_pfs_t *pfs; 536 hammer2_chain_t *parent; 537 hammer2_chain_t *chain; 538 hammer2_key_t key_next; 539 hammer2_key_t lhc; 540 int error; 541 size_t len; 542 543 hmp = ip->pmp->pfs_hmps[0]; 544 if (hmp == NULL) 545 return (EINVAL); 546 547 pfs = data; 548 error = 0; 549 550 hammer2_inode_lock(hmp->spmp->iroot, HAMMER2_RESOLVE_SHARED); 551 parent = hammer2_inode_chain(hmp->spmp->iroot, 0, 552 HAMMER2_RESOLVE_ALWAYS | 553 HAMMER2_RESOLVE_SHARED); 554 555 pfs->name[sizeof(pfs->name) - 1] = 0; 556 len = strlen(pfs->name); 557 lhc = hammer2_dirhash(pfs->name, len); 558 559 chain = hammer2_chain_lookup(&parent, &key_next, 560 lhc, lhc + HAMMER2_DIRHASH_LOMASK, 561 &error, HAMMER2_LOOKUP_SHARED); 562 while (chain) { 563 if (hammer2_chain_dirent_test(chain, pfs->name, len)) 564 break; 565 chain = hammer2_chain_next(&parent, chain, &key_next, 566 key_next, 567 lhc + HAMMER2_DIRHASH_LOMASK, 568 &error, HAMMER2_LOOKUP_SHARED); 569 } 570 error = hammer2_error_to_errno(error); 571 572 /* 573 * Load the data being returned by the ioctl. 574 */ 575 if (chain && chain->error == 0) { 576 KKASSERT(chain->bref.type == HAMMER2_BREF_TYPE_INODE); 577 ripdata = &chain->data->ipdata; 578 pfs->name_key = ripdata->meta.name_key; 579 pfs->pfs_type = ripdata->meta.pfs_type; 580 pfs->pfs_subtype = ripdata->meta.pfs_subtype; 581 pfs->pfs_clid = ripdata->meta.pfs_clid; 582 pfs->pfs_fsid = ripdata->meta.pfs_fsid; 583 ripdata = NULL; 584 585 hammer2_chain_unlock(chain); 586 hammer2_chain_drop(chain); 587 } else if (error == 0) { 588 error = ENOENT; 589 } 590 if (parent) { 591 hammer2_chain_unlock(parent); 592 hammer2_chain_drop(parent); 593 } 594 hammer2_inode_unlock(hmp->spmp->iroot); 595 596 return (error); 597 } 598 599 /* 600 * Create a new PFS under the super-root 601 */ 602 static int 603 hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data) 604 { 605 hammer2_inode_data_t *nipdata; 606 hammer2_chain_t *nchain; 607 hammer2_dev_t *hmp; 608 hammer2_dev_t *force_local; 609 hammer2_ioc_pfs_t *pfs; 610 hammer2_inode_t *nip; 611 hammer2_tid_t mtid; 612 int error; 613 614 hmp = ip->pmp->pfs_hmps[0]; /* XXX */ 615 if (hmp == NULL) 616 return (EINVAL); 617 618 pfs = data; 619 nip = NULL; 620 621 if (pfs->name[0] == 0) 622 return(EINVAL); 623 pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure 0-termination */ 624 625 if (hammer2_ioctl_pfs_lookup(ip, pfs) == 0) 626 return(EEXIST); 627 628 hammer2_trans_init(hmp->spmp, HAMMER2_TRANS_ISFLUSH); 629 mtid = hammer2_trans_sub(hmp->spmp); 630 nip = hammer2_inode_create_pfs(hmp->spmp, pfs->name, strlen(pfs->name), 631 &error); 632 if (error == 0) { 633 atomic_set_int(&nip->flags, HAMMER2_INODE_NOSIDEQ); 634 hammer2_inode_modify(nip); 635 nchain = hammer2_inode_chain(nip, 0, HAMMER2_RESOLVE_ALWAYS); 636 error = hammer2_chain_modify(nchain, mtid, 0, 0); 637 KKASSERT(error == 0); 638 nipdata = &nchain->data->ipdata; 639 640 nip->meta.pfs_type = pfs->pfs_type; 641 nip->meta.pfs_subtype = pfs->pfs_subtype; 642 nip->meta.pfs_clid = pfs->pfs_clid; 643 nip->meta.pfs_fsid = pfs->pfs_fsid; 644 nip->meta.op_flags |= HAMMER2_OPFLAG_PFSROOT; 645 646 /* 647 * Set default compression and check algorithm. This 648 * can be changed later. 649 * 650 * Do not allow compression on PFS's with the special name 651 * "boot", the boot loader can't decompress (yet). 652 */ 653 nip->meta.comp_algo = 654 HAMMER2_ENC_ALGO(HAMMER2_COMP_NEWFS_DEFAULT); 655 nip->meta.check_algo = 656 HAMMER2_ENC_ALGO( HAMMER2_CHECK_XXHASH64); 657 658 if (strcasecmp(pfs->name, "boot") == 0) { 659 nip->meta.comp_algo = 660 HAMMER2_ENC_ALGO(HAMMER2_COMP_AUTOZERO); 661 } 662 663 /* 664 * Super-root isn't mounted, fsync it 665 */ 666 hammer2_chain_unlock(nchain); 667 hammer2_inode_ref(nip); 668 hammer2_inode_unlock(nip); 669 hammer2_inode_chain_sync(nip); 670 hammer2_inode_chain_flush(nip, HAMMER2_XOP_INODE_STOP | 671 HAMMER2_XOP_FSSYNC); 672 hammer2_inode_drop(nip); 673 /* nip is dead */ 674 675 /* 676 * We still have a ref on the chain, relock and associate 677 * with an appropriate PFS. 678 */ 679 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL; 680 681 hammer2_chain_lock(nchain, HAMMER2_RESOLVE_ALWAYS); 682 nipdata = &nchain->data->ipdata; 683 kprintf("ADD LOCAL PFS (IOCTL): %s\n", nipdata->filename); 684 hammer2_pfsalloc(nchain, nipdata, 685 nchain->bref.modify_tid, force_local); 686 687 hammer2_chain_unlock(nchain); 688 hammer2_chain_drop(nchain); 689 } 690 hammer2_trans_done(hmp->spmp, HAMMER2_TRANS_ISFLUSH | 691 HAMMER2_TRANS_SIDEQ); 692 693 return (error); 694 } 695 696 /* 697 * Destroy an existing PFS under the super-root 698 */ 699 static int 700 hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data) 701 { 702 hammer2_ioc_pfs_t *pfs = data; 703 hammer2_dev_t *hmp; 704 hammer2_pfs_t *spmp; 705 hammer2_pfs_t *pmp; 706 hammer2_xop_unlink_t *xop; 707 hammer2_inode_t *dip; 708 hammer2_inode_t *iroot; 709 int error; 710 int i; 711 712 /* 713 * The PFS should be probed, so we should be able to 714 * locate it. We only delete the PFS from the 715 * specific H2 block device (hmp), not all of 716 * them. We must remove the PFS from the cluster 717 * before we can destroy it. 718 */ 719 hmp = ip->pmp->pfs_hmps[0]; 720 if (hmp == NULL) 721 return (EINVAL); 722 723 pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure termination */ 724 725 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 726 727 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) { 728 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 729 if (pmp->pfs_hmps[i] != hmp) 730 continue; 731 if (pmp->pfs_names[i] && 732 strcmp(pmp->pfs_names[i], pfs->name) == 0) { 733 break; 734 } 735 } 736 if (i != HAMMER2_MAXCLUSTER) 737 break; 738 } 739 740 if (pmp == NULL) { 741 lockmgr(&hammer2_mntlk, LK_RELEASE); 742 return ENOENT; 743 } 744 if (pmp->mp) { 745 lockmgr(&hammer2_mntlk, LK_RELEASE); 746 return EBUSY; 747 } 748 749 /* 750 * Ok, we found the pmp and we have the index. Permanently remove 751 * the PFS from the cluster 752 */ 753 iroot = pmp->iroot; 754 kprintf("FOUND PFS %s CLINDEX %d\n", pfs->name, i); 755 hammer2_pfsdealloc(pmp, i, 1); 756 757 lockmgr(&hammer2_mntlk, LK_RELEASE); 758 759 /* 760 * Now destroy the PFS under its device using the per-device 761 * super-root. 762 */ 763 spmp = hmp->spmp; 764 dip = spmp->iroot; 765 hammer2_trans_init(spmp, 0); 766 hammer2_inode_lock(dip, 0); 767 768 xop = hammer2_xop_alloc(dip, HAMMER2_XOP_MODIFYING); 769 hammer2_xop_setname(&xop->head, pfs->name, strlen(pfs->name)); 770 xop->isdir = 2; 771 xop->dopermanent = H2DOPERM_PERMANENT | H2DOPERM_FORCE; 772 hammer2_xop_start(&xop->head, &hammer2_unlink_desc); 773 774 error = hammer2_xop_collect(&xop->head, 0); 775 776 hammer2_inode_unlock(dip); 777 778 #if 0 779 if (error == 0) { 780 ip = hammer2_inode_get(dip->pmp, &xop->head, -1, -1); 781 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 782 if (ip) { 783 hammer2_inode_unlink_finisher(ip, 0); 784 hammer2_inode_unlock(ip); 785 } 786 } else { 787 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 788 } 789 #endif 790 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 791 792 hammer2_trans_done(spmp, HAMMER2_TRANS_SIDEQ); 793 794 return (hammer2_error_to_errno(error)); 795 } 796 797 static int 798 hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data) 799 { 800 hammer2_ioc_pfs_t *pfs = data; 801 hammer2_dev_t *hmp; 802 hammer2_pfs_t *pmp; 803 hammer2_chain_t *chain; 804 hammer2_inode_t *nip; 805 hammer2_tid_t mtid; 806 size_t name_len; 807 hammer2_key_t lhc; 808 int error; 809 #if 0 810 uuid_t opfs_clid; 811 #endif 812 813 if (pfs->name[0] == 0) 814 return(EINVAL); 815 if (pfs->name[sizeof(pfs->name)-1] != 0) 816 return(EINVAL); 817 818 pmp = ip->pmp; 819 ip = pmp->iroot; 820 821 hmp = pmp->pfs_hmps[0]; 822 if (hmp == NULL) 823 return (EINVAL); 824 825 lockmgr(&hmp->bulklk, LK_EXCLUSIVE); 826 827 /* 828 * NOSYNC is for debugging. We skip the filesystem sync and use 829 * a normal transaction (which is less likely to stall). used for 830 * testing filesystem consistency. 831 * 832 * In normal mode we sync the filesystem and use a flush transaction. 833 */ 834 if (pfs->pfs_flags & HAMMER2_PFSFLAGS_NOSYNC) { 835 hammer2_trans_init(pmp, 0); 836 } else { 837 hammer2_vfs_sync(pmp->mp, MNT_WAIT); 838 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH); 839 } 840 mtid = hammer2_trans_sub(pmp); 841 hammer2_inode_lock(ip, 0); 842 hammer2_inode_modify(ip); 843 ip->meta.pfs_lsnap_tid = mtid; 844 845 /* XXX cluster it! */ 846 chain = hammer2_inode_chain(ip, 0, HAMMER2_RESOLVE_ALWAYS); 847 848 name_len = strlen(pfs->name); 849 lhc = hammer2_dirhash(pfs->name, name_len); 850 851 /* 852 * Get the clid 853 */ 854 hmp = chain->hmp; 855 856 /* 857 * Create the snapshot directory under the super-root 858 * 859 * Set PFS type, generate a unique filesystem id, and generate 860 * a cluster id. Use the same clid when snapshotting a PFS root, 861 * which theoretically allows the snapshot to be used as part of 862 * the same cluster (perhaps as a cache). 863 * 864 * Note that pfs_lsnap_tid must be set in the snapshot as well, 865 * ensuring that any nocrc/nocomp file data modifications force 866 * a copy-on-write. 867 * 868 * Copy the (flushed) blockref array. Theoretically we could use 869 * chain_duplicate() but it becomes difficult to disentangle 870 * the shared core so for now just brute-force it. 871 */ 872 hammer2_chain_unlock(chain); 873 nip = hammer2_inode_create_pfs(hmp->spmp, pfs->name, name_len, &error); 874 hammer2_chain_lock(chain, HAMMER2_RESOLVE_ALWAYS); 875 876 if (nip) { 877 hammer2_dev_t *force_local; 878 hammer2_chain_t *nchain; 879 hammer2_inode_data_t *wipdata; 880 hammer2_tid_t starting_inum; 881 882 atomic_set_int(&nip->flags, HAMMER2_INODE_NOSIDEQ); 883 hammer2_inode_modify(nip); 884 nchain = hammer2_inode_chain(nip, 0, HAMMER2_RESOLVE_ALWAYS); 885 error = hammer2_chain_modify(nchain, mtid, 0, 0); 886 KKASSERT(error == 0); 887 wipdata = &nchain->data->ipdata; 888 889 starting_inum = ip->pmp->inode_tid + 1; 890 nip->meta.pfs_inum = starting_inum; 891 nip->meta.pfs_type = HAMMER2_PFSTYPE_MASTER; 892 nip->meta.pfs_subtype = HAMMER2_PFSSUBTYPE_SNAPSHOT; 893 nip->meta.op_flags |= HAMMER2_OPFLAG_PFSROOT; 894 nip->meta.pfs_lsnap_tid = mtid; 895 nchain->bref.embed.stats = chain->bref.embed.stats; 896 897 kern_uuidgen(&nip->meta.pfs_fsid, 1); 898 899 #if 0 900 /* 901 * Give the snapshot its own private cluster id. As a 902 * snapshot no further synchronization with the original 903 * cluster will be done. 904 */ 905 if (chain->flags & HAMMER2_CHAIN_PFSBOUNDARY) 906 nip->meta.pfs_clid = opfs_clid; 907 else 908 kern_uuidgen(&nip->meta.pfs_clid, 1); 909 #endif 910 kern_uuidgen(&nip->meta.pfs_clid, 1); 911 nchain->bref.flags |= HAMMER2_BREF_FLAG_PFSROOT; 912 913 /* XXX hack blockset copy */ 914 /* XXX doesn't work with real cluster */ 915 wipdata->meta = nip->meta; 916 hammer2_spin_ex(&pmp->inum_spin); 917 wipdata->u.blockset = pmp->pfs_iroot_blocksets[0]; 918 hammer2_spin_unex(&pmp->inum_spin); 919 920 KKASSERT(wipdata == &nchain->data->ipdata); 921 922 hammer2_chain_unlock(nchain); 923 hammer2_inode_ref(nip); 924 hammer2_inode_unlock(nip); 925 hammer2_inode_chain_sync(nip); 926 hammer2_inode_chain_flush(nip, HAMMER2_XOP_INODE_STOP | 927 HAMMER2_XOP_FSSYNC); 928 /* XXX | HAMMER2_XOP_VOLHDR */ 929 hammer2_inode_drop(nip); 930 /* nip is dead */ 931 932 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL; 933 934 hammer2_chain_lock(nchain, HAMMER2_RESOLVE_ALWAYS); 935 wipdata = &nchain->data->ipdata; 936 kprintf("SNAPSHOT LOCAL PFS (IOCTL): %s\n", wipdata->filename); 937 hammer2_pfsalloc(nchain, wipdata, nchain->bref.modify_tid, 938 force_local); 939 nchain->pmp->inode_tid = starting_inum; 940 941 hammer2_chain_unlock(nchain); 942 hammer2_chain_drop(nchain); 943 } 944 945 hammer2_chain_unlock(chain); 946 hammer2_chain_drop(chain); 947 948 hammer2_inode_unlock(ip); 949 if (pfs->pfs_flags & HAMMER2_PFSFLAGS_NOSYNC) { 950 hammer2_trans_done(pmp, 0); 951 } else { 952 hammer2_trans_done(pmp, HAMMER2_TRANS_ISFLUSH | 953 HAMMER2_TRANS_SIDEQ); 954 } 955 956 lockmgr(&hmp->bulklk, LK_RELEASE); 957 958 return (hammer2_error_to_errno(error)); 959 } 960 961 /* 962 * Retrieve the raw inode structure, non-inclusive of node-specific data. 963 */ 964 static int 965 hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data) 966 { 967 hammer2_ioc_inode_t *ino; 968 int error; 969 970 ino = data; 971 error = 0; 972 973 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED); 974 ino->data_count = hammer2_inode_data_count(ip); 975 ino->inode_count = hammer2_inode_inode_count(ip); 976 977 bzero(&ino->ip_data, sizeof(ino->ip_data)); 978 ino->ip_data.meta = ip->meta; 979 hammer2_inode_unlock(ip); 980 981 return hammer2_error_to_errno(error); 982 } 983 984 /* 985 * Set various parameters in an inode which cannot be set through 986 * normal filesystem VNOPS. 987 */ 988 static int 989 hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data) 990 { 991 hammer2_ioc_inode_t *ino = data; 992 int error = 0; 993 994 hammer2_trans_init(ip->pmp, 0); 995 hammer2_inode_lock(ip, 0); 996 997 if ((ino->flags & HAMMER2IOC_INODE_FLAG_CHECK) && 998 ip->meta.check_algo != ino->ip_data.meta.check_algo) { 999 hammer2_inode_modify(ip); 1000 ip->meta.check_algo = ino->ip_data.meta.check_algo; 1001 } 1002 if ((ino->flags & HAMMER2IOC_INODE_FLAG_COMP) && 1003 ip->meta.comp_algo != ino->ip_data.meta.comp_algo) { 1004 hammer2_inode_modify(ip); 1005 ip->meta.comp_algo = ino->ip_data.meta.comp_algo; 1006 } 1007 1008 /* Ignore these flags for now...*/ 1009 if ((ino->flags & HAMMER2IOC_INODE_FLAG_IQUOTA) && 1010 ip->meta.inode_quota != ino->ip_data.meta.inode_quota) { 1011 hammer2_inode_modify(ip); 1012 ip->meta.inode_quota = ino->ip_data.meta.inode_quota; 1013 } 1014 if ((ino->flags & HAMMER2IOC_INODE_FLAG_DQUOTA) && 1015 ip->meta.data_quota != ino->ip_data.meta.data_quota) { 1016 hammer2_inode_modify(ip); 1017 ip->meta.data_quota = ino->ip_data.meta.data_quota; 1018 } 1019 if ((ino->flags & HAMMER2IOC_INODE_FLAG_COPIES) && 1020 ip->meta.ncopies != ino->ip_data.meta.ncopies) { 1021 hammer2_inode_modify(ip); 1022 ip->meta.ncopies = ino->ip_data.meta.ncopies; 1023 } 1024 hammer2_inode_unlock(ip); 1025 hammer2_trans_done(ip->pmp, HAMMER2_TRANS_SIDEQ); 1026 1027 return (hammer2_error_to_errno(error)); 1028 } 1029 1030 static 1031 int 1032 hammer2_ioctl_debug_dump(hammer2_inode_t *ip, u_int flags) 1033 { 1034 hammer2_chain_t *chain; 1035 int count = 100000; 1036 int i; 1037 1038 for (i = 0; i < ip->cluster.nchains; ++i) { 1039 chain = ip->cluster.array[i].chain; 1040 if (chain == NULL) 1041 continue; 1042 hammer2_dump_chain(chain, 0, i, &count, 'i', flags); 1043 } 1044 return 0; 1045 } 1046 1047 /* 1048 * Turn on or off emergency mode on a filesystem. 1049 */ 1050 static 1051 int 1052 hammer2_ioctl_emerg_mode(hammer2_inode_t *ip, u_int mode) 1053 { 1054 hammer2_pfs_t *pmp; 1055 hammer2_dev_t *hmp; 1056 int i; 1057 1058 pmp = ip->pmp; 1059 if (mode) { 1060 kprintf("hammer2: WARNING: Emergency mode enabled\n"); 1061 atomic_set_int(&pmp->flags, HAMMER2_PMPF_EMERG); 1062 } else { 1063 kprintf("hammer2: WARNING: Emergency mode disabled\n"); 1064 atomic_clear_int(&pmp->flags, HAMMER2_PMPF_EMERG); 1065 } 1066 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 1067 hmp = pmp->pfs_hmps[i]; 1068 if (hmp == NULL) 1069 continue; 1070 if (mode) 1071 atomic_set_int(&hmp->hflags, HMNT2_EMERG); 1072 else 1073 atomic_clear_int(&hmp->hflags, HMNT2_EMERG); 1074 } 1075 return 0; 1076 } 1077 1078 /* 1079 * Executes one flush/free pass per call. If trying to recover 1080 * data we just freed up a moment ago it can take up to six passes 1081 * to fully free the blocks. Note that passes occur automatically based 1082 * on free space as the storage fills up, but manual passes may be needed 1083 * if storage becomes almost completely full. 1084 */ 1085 static 1086 int 1087 hammer2_ioctl_bulkfree_scan(hammer2_inode_t *ip, void *data) 1088 { 1089 hammer2_ioc_bulkfree_t *bfi = data; 1090 hammer2_dev_t *hmp; 1091 hammer2_pfs_t *pmp; 1092 hammer2_chain_t *vchain; 1093 int error; 1094 int didsnap; 1095 1096 pmp = ip->pmp; 1097 ip = pmp->iroot; 1098 1099 hmp = pmp->pfs_hmps[0]; 1100 if (hmp == NULL) 1101 return (EINVAL); 1102 if (bfi == NULL) 1103 return (EINVAL); 1104 1105 /* 1106 * Bulkfree has to be serialized to guarantee at least one sync 1107 * inbetween bulkfrees. 1108 */ 1109 error = lockmgr(&hmp->bflock, LK_EXCLUSIVE | LK_PCATCH); 1110 if (error) 1111 return error; 1112 1113 /* 1114 * sync the filesystem and obtain a snapshot of the synchronized 1115 * hmp volume header. We treat the snapshot as an independent 1116 * entity. 1117 * 1118 * If ENOSPC occurs we should continue, because bulkfree is the only 1119 * way to fix that. The flush will have flushed everything it could 1120 * and not left any modified chains. Otherwise an error is fatal. 1121 */ 1122 error = hammer2_vfs_sync(pmp->mp, MNT_WAIT); 1123 if (error && error != ENOSPC) 1124 goto failed; 1125 1126 /* 1127 * If we have an ENOSPC error we have to bulkfree on the live 1128 * topology. Otherwise we can bulkfree on a snapshot. 1129 */ 1130 if (error) { 1131 kprintf("hammer2: WARNING! Bulkfree forced to use live " 1132 "topology\n"); 1133 vchain = &hmp->vchain; 1134 hammer2_chain_ref(vchain); 1135 didsnap = 0; 1136 } else { 1137 vchain = hammer2_chain_bulksnap(hmp); 1138 didsnap = 1; 1139 } 1140 1141 /* 1142 * Bulkfree on a snapshot does not need a transaction, which allows 1143 * it to run concurrently with any operation other than another 1144 * bulkfree. 1145 * 1146 * If we are running bulkfree on the live topology we have to be 1147 * in a FLUSH transaction. 1148 */ 1149 if (didsnap == 0) 1150 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH); 1151 1152 if (bfi) { 1153 hammer2_thr_freeze(&hmp->bfthr); 1154 error = hammer2_bulkfree_pass(hmp, vchain, bfi); 1155 hammer2_thr_unfreeze(&hmp->bfthr); 1156 } 1157 if (didsnap) { 1158 hammer2_chain_bulkdrop(vchain); 1159 } else { 1160 hammer2_chain_drop(vchain); 1161 hammer2_trans_done(pmp, HAMMER2_TRANS_ISFLUSH | 1162 HAMMER2_TRANS_SIDEQ); 1163 } 1164 error = hammer2_error_to_errno(error); 1165 1166 failed: 1167 lockmgr(&hmp->bflock, LK_RELEASE); 1168 return error; 1169 } 1170 1171 /* 1172 * Unconditionally delete meta-data in a hammer2 filesystem 1173 */ 1174 static 1175 int 1176 hammer2_ioctl_destroy(hammer2_inode_t *ip, void *data) 1177 { 1178 hammer2_ioc_destroy_t *iocd = data; 1179 hammer2_pfs_t *pmp = ip->pmp; 1180 int error; 1181 1182 if (pmp->ronly) { 1183 error = EROFS; 1184 return error; 1185 } 1186 1187 switch(iocd->cmd) { 1188 case HAMMER2_DELETE_FILE: 1189 /* 1190 * Destroy a bad directory entry by name. Caller must 1191 * pass the directory as fd. 1192 */ 1193 { 1194 hammer2_xop_unlink_t *xop; 1195 1196 if (iocd->path[sizeof(iocd->path)-1]) { 1197 error = EINVAL; 1198 break; 1199 } 1200 if (ip->meta.type != HAMMER2_OBJTYPE_DIRECTORY) { 1201 error = EINVAL; 1202 break; 1203 } 1204 hammer2_pfs_memory_wait(pmp); 1205 hammer2_trans_init(pmp, 0); 1206 hammer2_inode_lock(ip, 0); 1207 1208 xop = hammer2_xop_alloc(ip, HAMMER2_XOP_MODIFYING); 1209 hammer2_xop_setname(&xop->head, iocd->path, strlen(iocd->path)); 1210 xop->isdir = -1; 1211 xop->dopermanent = H2DOPERM_PERMANENT | 1212 H2DOPERM_FORCE | 1213 H2DOPERM_IGNINO; 1214 hammer2_xop_start(&xop->head, &hammer2_unlink_desc); 1215 1216 error = hammer2_xop_collect(&xop->head, 0); 1217 error = hammer2_error_to_errno(error); 1218 hammer2_inode_unlock(ip); 1219 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1220 hammer2_trans_done(pmp, HAMMER2_TRANS_SIDEQ); 1221 } 1222 break; 1223 case HAMMER2_DELETE_INUM: 1224 /* 1225 * Destroy a bad inode by inode number. 1226 */ 1227 { 1228 hammer2_xop_lookup_t *xop; 1229 1230 if (iocd->inum < 1) { 1231 error = EINVAL; 1232 break; 1233 } 1234 hammer2_pfs_memory_wait(pmp); 1235 hammer2_trans_init(pmp, 0); 1236 1237 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING); 1238 xop->lhc = iocd->inum; 1239 hammer2_xop_start(&xop->head, &hammer2_delete_desc); 1240 error = hammer2_xop_collect(&xop->head, 0); 1241 error = hammer2_error_to_errno(error); 1242 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1243 hammer2_trans_done(pmp, HAMMER2_TRANS_SIDEQ); 1244 } 1245 break; 1246 default: 1247 error = EINVAL; 1248 break; 1249 } 1250 return error; 1251 } 1252 1253 /* 1254 * Grow a filesystem into its partition size 1255 */ 1256 static int 1257 hammer2_ioctl_growfs(hammer2_inode_t *ip, void *data, struct ucred *cred) 1258 { 1259 hammer2_ioc_growfs_t *grow = data; 1260 hammer2_dev_t *hmp; 1261 hammer2_off_t delta; 1262 hammer2_tid_t mtid; 1263 struct buf *bp; 1264 int error; 1265 int i; 1266 1267 hmp = ip->pmp->pfs_hmps[0]; 1268 1269 if (hmp->nvolumes > 1) { 1270 kprintf("hammer2: growfs currently unsupported " 1271 "with multiple volumes\n"); 1272 return EOPNOTSUPP; 1273 } 1274 1275 /* 1276 * Extract from disklabel 1277 */ 1278 grow->modified = 0; 1279 if (grow->size == 0) { 1280 struct partinfo part; 1281 struct vattr_lite va; 1282 1283 if (VOP_IOCTL(hmp->devvp, DIOCGPART, (void *)&part, 1284 0, cred, NULL) == 0) { 1285 grow->size = part.media_size; 1286 kprintf("hammer2: growfs partition-auto to %jd\n", 1287 (intmax_t)grow->size); 1288 } else if (VOP_GETATTR_LITE(hmp->devvp, &va) == 0) { 1289 grow->size = va.va_size; 1290 kprintf("hammer2: growfs fstat-auto to %jd\n", 1291 (intmax_t)grow->size); 1292 } else { 1293 return EINVAL; 1294 } 1295 } 1296 1297 /* 1298 * This is typically ~8MB alignment to avoid edge cases accessing 1299 * reserved blocks at the base of each 2GB zone. 1300 */ 1301 grow->size &= ~HAMMER2_VOLUME_ALIGNMASK64; 1302 delta = grow->size - hmp->voldata.volu_size; 1303 1304 /* 1305 * Maximum allowed size is 2^63 1306 */ 1307 if (grow->size > 0x7FFFFFFFFFFFFFFFLU) { 1308 kprintf("hammer2: growfs failure, limit is 2^63 - 1 bytes\n"); 1309 return EINVAL; 1310 } 1311 1312 /* 1313 * We can't shrink a filesystem 1314 */ 1315 if (grow->size < hmp->voldata.volu_size) { 1316 kprintf("hammer2: growfs failure, " 1317 "would shrink from %jd to %jd\n", 1318 (intmax_t)hmp->voldata.volu_size, 1319 (intmax_t)grow->size); 1320 return EINVAL; 1321 } 1322 1323 if (delta == 0) { 1324 kprintf("hammer2: growfs - size did not change\n"); 1325 return 0; 1326 } 1327 1328 /* 1329 * Clear any new volume header backups that we extend into. 1330 * Skip volume headers that are already part of the filesystem. 1331 */ 1332 for (i = 0; i < HAMMER2_NUM_VOLHDRS; ++i) { 1333 if (i * HAMMER2_ZONE_BYTES64 < hmp->voldata.volu_size) 1334 continue; 1335 if (i * HAMMER2_ZONE_BYTES64 >= grow->size) 1336 break; 1337 kprintf("hammer2: growfs - clear volhdr %d ", i); 1338 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64, 1339 HAMMER2_VOLUME_BYTES, &bp); 1340 if (error) { 1341 brelse(bp); 1342 kprintf("I/O error %d\n", error); 1343 return EINVAL; 1344 } 1345 bzero(bp->b_data, HAMMER2_VOLUME_BYTES); 1346 error = bwrite(bp); 1347 if (error) { 1348 kprintf("I/O error %d\n", error); 1349 return EINVAL; 1350 } 1351 kprintf("\n"); 1352 } 1353 1354 hammer2_trans_init(hmp->spmp, HAMMER2_TRANS_ISFLUSH); 1355 mtid = hammer2_trans_sub(hmp->spmp); 1356 1357 kprintf("hammer2: growfs - expand by %jd to %jd mtid %016jx\n", 1358 (intmax_t)delta, (intmax_t)grow->size, mtid); 1359 1360 1361 hammer2_voldata_lock(hmp); 1362 hammer2_voldata_modify(hmp); 1363 1364 /* 1365 * NOTE: Just adjusting total_size for a single-volume filesystem 1366 * or for the last volume in a multi-volume filesystem, is 1367 * fine. But we can't grow any other partition in a multi-volume 1368 * filesystem. For now we just punt (at the top) on any 1369 * multi-volume filesystem. 1370 */ 1371 hmp->voldata.volu_size = grow->size; 1372 hmp->voldata.total_size += delta; 1373 hmp->voldata.allocator_size += delta; 1374 hmp->voldata.allocator_free += delta; 1375 hmp->total_size += delta; 1376 hmp->volumes[0].size += delta; /* note: indexes first (only) volume */ 1377 1378 hammer2_voldata_unlock(hmp); 1379 1380 hammer2_trans_done(hmp->spmp, HAMMER2_TRANS_ISFLUSH | 1381 HAMMER2_TRANS_SIDEQ); 1382 grow->modified = 1; 1383 1384 /* 1385 * Flush the mess right here and now. We could just let the 1386 * filesystem syncer do it, but this was a sensitive operation 1387 * so don't take any chances. 1388 */ 1389 hammer2_vfs_sync(ip->pmp->mp, MNT_WAIT); 1390 1391 return 0; 1392 } 1393 1394 /* 1395 * Get a list of volumes. 1396 */ 1397 static int 1398 hammer2_ioctl_volume_list(hammer2_inode_t *ip, void *data) 1399 { 1400 hammer2_ioc_volume_list_t *vollist = data; 1401 hammer2_ioc_volume_t entry; 1402 hammer2_volume_t *vol; 1403 hammer2_dev_t *hmp; 1404 hammer2_pfs_t *pmp; 1405 int i, error = 0, cnt = 0; 1406 1407 pmp = ip->pmp; 1408 hmp = pmp->pfs_hmps[0]; 1409 if (hmp == NULL) 1410 return (EINVAL); 1411 1412 hammer2_voldata_lock(hmp); 1413 for (i = 0; i < hmp->nvolumes; ++i) { 1414 if (cnt >= vollist->nvolumes) 1415 break; 1416 vol = &hmp->volumes[i]; 1417 bzero(&entry, sizeof(entry)); 1418 /* copy hammer2_volume_t fields */ 1419 entry.id = vol->id; 1420 bcopy(vol->dev->path, entry.path, sizeof(entry.path)); 1421 entry.offset = vol->offset; 1422 entry.size = vol->size; 1423 error = copyout(&entry, &vollist->volumes[cnt], sizeof(entry)); 1424 if (error) 1425 goto failed; 1426 cnt++; 1427 } 1428 vollist->nvolumes = cnt; 1429 vollist->version = hmp->voldata.version; 1430 bcopy(pmp->pfs_names[0], vollist->pfs_name, sizeof(vollist->pfs_name)); 1431 failed: 1432 hammer2_voldata_unlock(hmp); 1433 1434 return error; 1435 } 1436