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, force_local); 685 686 hammer2_chain_unlock(nchain); 687 hammer2_chain_drop(nchain); 688 } 689 hammer2_trans_done(hmp->spmp, HAMMER2_TRANS_ISFLUSH | 690 HAMMER2_TRANS_SIDEQ); 691 692 return (error); 693 } 694 695 /* 696 * Destroy an existing PFS under the super-root 697 */ 698 static int 699 hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data) 700 { 701 hammer2_ioc_pfs_t *pfs = data; 702 hammer2_dev_t *hmp; 703 hammer2_pfs_t *spmp; 704 hammer2_pfs_t *pmp; 705 hammer2_xop_unlink_t *xop; 706 hammer2_inode_t *dip; 707 hammer2_inode_t *iroot; 708 int error; 709 int i; 710 711 /* 712 * The PFS should be probed, so we should be able to 713 * locate it. We only delete the PFS from the 714 * specific H2 block device (hmp), not all of 715 * them. We must remove the PFS from the cluster 716 * before we can destroy it. 717 */ 718 hmp = ip->pmp->pfs_hmps[0]; 719 if (hmp == NULL) 720 return (EINVAL); 721 722 pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure termination */ 723 724 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 725 726 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) { 727 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 728 if (pmp->pfs_hmps[i] != hmp) 729 continue; 730 if (pmp->pfs_names[i] && 731 strcmp(pmp->pfs_names[i], pfs->name) == 0) { 732 break; 733 } 734 } 735 if (i != HAMMER2_MAXCLUSTER) 736 break; 737 } 738 739 if (pmp == NULL) { 740 lockmgr(&hammer2_mntlk, LK_RELEASE); 741 return ENOENT; 742 } 743 if (pmp->mp) { 744 lockmgr(&hammer2_mntlk, LK_RELEASE); 745 return EBUSY; 746 } 747 748 /* 749 * Ok, we found the pmp and we have the index. Permanently remove 750 * the PFS from the cluster 751 */ 752 iroot = pmp->iroot; 753 kprintf("FOUND PFS %s CLINDEX %d\n", pfs->name, i); 754 hammer2_pfsdealloc(pmp, i, 1); 755 756 lockmgr(&hammer2_mntlk, LK_RELEASE); 757 758 /* 759 * Now destroy the PFS under its device using the per-device 760 * super-root. 761 */ 762 spmp = hmp->spmp; 763 dip = spmp->iroot; 764 hammer2_trans_init(spmp, 0); 765 hammer2_inode_lock(dip, 0); 766 767 xop = hammer2_xop_alloc(dip, HAMMER2_XOP_MODIFYING); 768 hammer2_xop_setname(&xop->head, pfs->name, strlen(pfs->name)); 769 xop->isdir = 2; 770 xop->dopermanent = H2DOPERM_PERMANENT | H2DOPERM_FORCE; 771 hammer2_xop_start(&xop->head, &hammer2_unlink_desc); 772 773 error = hammer2_xop_collect(&xop->head, 0); 774 775 hammer2_inode_unlock(dip); 776 777 #if 0 778 if (error == 0) { 779 ip = hammer2_inode_get(dip->pmp, &xop->head, -1, -1); 780 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 781 if (ip) { 782 hammer2_inode_unlink_finisher(ip, NULL); 783 hammer2_inode_unlock(ip); 784 } 785 } else { 786 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 787 } 788 #endif 789 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 790 791 hammer2_trans_done(spmp, HAMMER2_TRANS_SIDEQ); 792 793 return (hammer2_error_to_errno(error)); 794 } 795 796 static int 797 hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data) 798 { 799 hammer2_ioc_pfs_t *pfs = data; 800 hammer2_dev_t *hmp; 801 hammer2_pfs_t *pmp; 802 hammer2_chain_t *chain; 803 hammer2_inode_t *nip; 804 hammer2_tid_t mtid; 805 size_t name_len; 806 hammer2_key_t lhc; 807 int error; 808 #if 0 809 uuid_t opfs_clid; 810 #endif 811 812 if (pfs->name[0] == 0) 813 return(EINVAL); 814 if (pfs->name[sizeof(pfs->name)-1] != 0) 815 return(EINVAL); 816 817 pmp = ip->pmp; 818 ip = pmp->iroot; 819 820 hmp = pmp->pfs_hmps[0]; 821 if (hmp == NULL) 822 return (EINVAL); 823 824 lockmgr(&hmp->bulklk, LK_EXCLUSIVE); 825 826 /* 827 * NOSYNC is for debugging. We skip the filesystem sync and use 828 * a normal transaction (which is less likely to stall). used for 829 * testing filesystem consistency. 830 * 831 * In normal mode we sync the filesystem and use a flush transaction. 832 */ 833 if (pfs->pfs_flags & HAMMER2_PFSFLAGS_NOSYNC) { 834 hammer2_trans_init(pmp, 0); 835 } else { 836 hammer2_vfs_sync(pmp->mp, MNT_WAIT); 837 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH); 838 } 839 mtid = hammer2_trans_sub(pmp); 840 hammer2_inode_lock(ip, 0); 841 hammer2_inode_modify(ip); 842 ip->meta.pfs_lsnap_tid = mtid; 843 844 /* XXX cluster it! */ 845 chain = hammer2_inode_chain(ip, 0, HAMMER2_RESOLVE_ALWAYS); 846 847 name_len = strlen(pfs->name); 848 lhc = hammer2_dirhash(pfs->name, name_len); 849 850 /* 851 * Get the clid 852 */ 853 hmp = chain->hmp; 854 855 /* 856 * Create the snapshot directory under the super-root 857 * 858 * Set PFS type, generate a unique filesystem id, and generate 859 * a cluster id. Use the same clid when snapshotting a PFS root, 860 * which theoretically allows the snapshot to be used as part of 861 * the same cluster (perhaps as a cache). 862 * 863 * Note that pfs_lsnap_tid must be set in the snapshot as well, 864 * ensuring that any nocrc/nocomp file data modifications force 865 * a copy-on-write. 866 * 867 * Copy the (flushed) blockref array. Theoretically we could use 868 * chain_duplicate() but it becomes difficult to disentangle 869 * the shared core so for now just brute-force it. 870 */ 871 hammer2_chain_unlock(chain); 872 nip = hammer2_inode_create_pfs(hmp->spmp, pfs->name, name_len, &error); 873 hammer2_chain_lock(chain, HAMMER2_RESOLVE_ALWAYS); 874 875 if (nip) { 876 hammer2_dev_t *force_local; 877 hammer2_chain_t *nchain; 878 hammer2_inode_data_t *wipdata; 879 hammer2_tid_t starting_inum; 880 881 atomic_set_int(&nip->flags, HAMMER2_INODE_NOSIDEQ); 882 hammer2_inode_modify(nip); 883 nchain = hammer2_inode_chain(nip, 0, HAMMER2_RESOLVE_ALWAYS); 884 error = hammer2_chain_modify(nchain, mtid, 0, 0); 885 KKASSERT(error == 0); 886 wipdata = &nchain->data->ipdata; 887 888 starting_inum = ip->pmp->inode_tid + 1; 889 nip->meta.pfs_inum = starting_inum; 890 nip->meta.pfs_type = HAMMER2_PFSTYPE_MASTER; 891 nip->meta.pfs_subtype = HAMMER2_PFSSUBTYPE_SNAPSHOT; 892 nip->meta.op_flags |= HAMMER2_OPFLAG_PFSROOT; 893 nip->meta.pfs_lsnap_tid = mtid; 894 nchain->bref.embed.stats = chain->bref.embed.stats; 895 896 kern_uuidgen(&nip->meta.pfs_fsid, 1); 897 898 #if 0 899 /* 900 * Give the snapshot its own private cluster id. As a 901 * snapshot no further synchronization with the original 902 * cluster will be done. 903 */ 904 if (chain->flags & HAMMER2_CHAIN_PFSBOUNDARY) 905 nip->meta.pfs_clid = opfs_clid; 906 else 907 kern_uuidgen(&nip->meta.pfs_clid, 1); 908 #endif 909 kern_uuidgen(&nip->meta.pfs_clid, 1); 910 nchain->bref.flags |= HAMMER2_BREF_FLAG_PFSROOT; 911 912 /* XXX hack blockset copy */ 913 /* XXX doesn't work with real cluster */ 914 wipdata->meta = nip->meta; 915 hammer2_spin_ex(&pmp->inum_spin); 916 wipdata->u.blockset = pmp->pfs_iroot_blocksets[0]; 917 hammer2_spin_unex(&pmp->inum_spin); 918 919 KKASSERT(wipdata == &nchain->data->ipdata); 920 921 hammer2_chain_unlock(nchain); 922 hammer2_inode_ref(nip); 923 hammer2_inode_unlock(nip); 924 hammer2_inode_chain_sync(nip); 925 hammer2_inode_chain_flush(nip, HAMMER2_XOP_INODE_STOP | 926 HAMMER2_XOP_FSSYNC); 927 /* XXX | HAMMER2_XOP_VOLHDR */ 928 hammer2_inode_drop(nip); 929 /* nip is dead */ 930 931 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL; 932 933 hammer2_chain_lock(nchain, HAMMER2_RESOLVE_ALWAYS); 934 wipdata = &nchain->data->ipdata; 935 kprintf("SNAPSHOT LOCAL PFS (IOCTL): %s\n", wipdata->filename); 936 hammer2_pfsalloc(nchain, wipdata, force_local); 937 nchain->pmp->inode_tid = starting_inum; 938 939 hammer2_chain_unlock(nchain); 940 hammer2_chain_drop(nchain); 941 } 942 943 hammer2_chain_unlock(chain); 944 hammer2_chain_drop(chain); 945 946 hammer2_inode_unlock(ip); 947 if (pfs->pfs_flags & HAMMER2_PFSFLAGS_NOSYNC) { 948 hammer2_trans_done(pmp, 0); 949 } else { 950 hammer2_trans_done(pmp, HAMMER2_TRANS_ISFLUSH | 951 HAMMER2_TRANS_SIDEQ); 952 } 953 954 lockmgr(&hmp->bulklk, LK_RELEASE); 955 956 return (hammer2_error_to_errno(error)); 957 } 958 959 /* 960 * Retrieve the raw inode structure, non-inclusive of node-specific data. 961 */ 962 static int 963 hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data) 964 { 965 hammer2_ioc_inode_t *ino = data; 966 967 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED); 968 ino->data_count = hammer2_inode_data_count(ip); 969 ino->inode_count = hammer2_inode_inode_count(ip); 970 971 bzero(&ino->ip_data, sizeof(ino->ip_data)); 972 ino->ip_data.meta = ip->meta; 973 hammer2_inode_unlock(ip); 974 975 return 0; 976 } 977 978 /* 979 * Set various parameters in an inode which cannot be set through 980 * normal filesystem VNOPS. 981 */ 982 static int 983 hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data) 984 { 985 hammer2_ioc_inode_t *ino = data; 986 987 hammer2_trans_init(ip->pmp, 0); 988 hammer2_inode_lock(ip, 0); 989 990 if ((ino->flags & HAMMER2IOC_INODE_FLAG_CHECK) && 991 ip->meta.check_algo != ino->ip_data.meta.check_algo) { 992 hammer2_inode_modify(ip); 993 ip->meta.check_algo = ino->ip_data.meta.check_algo; 994 } 995 if ((ino->flags & HAMMER2IOC_INODE_FLAG_COMP) && 996 ip->meta.comp_algo != ino->ip_data.meta.comp_algo) { 997 hammer2_inode_modify(ip); 998 ip->meta.comp_algo = ino->ip_data.meta.comp_algo; 999 } 1000 1001 /* Ignore these flags for now...*/ 1002 if ((ino->flags & HAMMER2IOC_INODE_FLAG_IQUOTA) && 1003 ip->meta.inode_quota != ino->ip_data.meta.inode_quota) { 1004 hammer2_inode_modify(ip); 1005 ip->meta.inode_quota = ino->ip_data.meta.inode_quota; 1006 } 1007 if ((ino->flags & HAMMER2IOC_INODE_FLAG_DQUOTA) && 1008 ip->meta.data_quota != ino->ip_data.meta.data_quota) { 1009 hammer2_inode_modify(ip); 1010 ip->meta.data_quota = ino->ip_data.meta.data_quota; 1011 } 1012 if ((ino->flags & HAMMER2IOC_INODE_FLAG_COPIES) && 1013 ip->meta.ncopies != ino->ip_data.meta.ncopies) { 1014 hammer2_inode_modify(ip); 1015 ip->meta.ncopies = ino->ip_data.meta.ncopies; 1016 } 1017 hammer2_inode_unlock(ip); 1018 hammer2_trans_done(ip->pmp, HAMMER2_TRANS_SIDEQ); 1019 1020 return (0); 1021 } 1022 1023 static 1024 int 1025 hammer2_ioctl_debug_dump(hammer2_inode_t *ip, u_int flags) 1026 { 1027 hammer2_chain_t *chain; 1028 int count = 100000; 1029 int i; 1030 1031 for (i = 0; i < ip->cluster.nchains; ++i) { 1032 chain = ip->cluster.array[i].chain; 1033 if (chain == NULL) 1034 continue; 1035 kprintf("cluster #%d\n", i); 1036 hammer2_dump_chain(chain, 0, 0, &count, 'i', flags); 1037 } 1038 return 0; 1039 } 1040 1041 /* 1042 * Turn on or off emergency mode on a filesystem. 1043 */ 1044 static 1045 int 1046 hammer2_ioctl_emerg_mode(hammer2_inode_t *ip, u_int mode) 1047 { 1048 hammer2_pfs_t *pmp; 1049 hammer2_dev_t *hmp; 1050 int i; 1051 1052 pmp = ip->pmp; 1053 if (mode) { 1054 kprintf("hammer2: WARNING: Emergency mode enabled\n"); 1055 atomic_set_int(&pmp->flags, HAMMER2_PMPF_EMERG); 1056 } else { 1057 kprintf("hammer2: WARNING: Emergency mode disabled\n"); 1058 atomic_clear_int(&pmp->flags, HAMMER2_PMPF_EMERG); 1059 } 1060 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 1061 hmp = pmp->pfs_hmps[i]; 1062 if (hmp == NULL) 1063 continue; 1064 if (mode) 1065 atomic_set_int(&hmp->hflags, HMNT2_EMERG); 1066 else 1067 atomic_clear_int(&hmp->hflags, HMNT2_EMERG); 1068 } 1069 return 0; 1070 } 1071 1072 /* 1073 * Do a bulkfree scan on media related to the PFS. This routine will 1074 * flush all PFSs associated with the media before doing the bulkfree 1075 * scan. 1076 * 1077 * This version can only run on non-clustered media. A new ioctl or a 1078 * temporary mount of @LOCAL will be needed to run on clustered media. 1079 */ 1080 static 1081 int 1082 hammer2_ioctl_bulkfree_scan(hammer2_inode_t *ip, void *data) 1083 { 1084 hammer2_ioc_bulkfree_t *bfi = data; 1085 hammer2_dev_t *hmp; 1086 hammer2_pfs_t *pmp; 1087 hammer2_chain_t *vchain; 1088 int error; 1089 int didsnap; 1090 1091 pmp = ip->pmp; 1092 ip = pmp->iroot; 1093 1094 hmp = pmp->pfs_hmps[0]; 1095 if (hmp == NULL) 1096 return (EINVAL); 1097 if (bfi == NULL) 1098 return (EINVAL); 1099 1100 /* 1101 * Bulkfree has to be serialized to guarantee at least one sync 1102 * inbetween bulkfrees. 1103 */ 1104 error = lockmgr(&hmp->bflock, LK_EXCLUSIVE | LK_PCATCH); 1105 if (error) 1106 return error; 1107 1108 /* 1109 * Sync all mounts related to the media 1110 */ 1111 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 1112 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) { 1113 int etmp; 1114 int i; 1115 1116 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 1117 if (pmp->pfs_hmps[i] != hmp) 1118 continue; 1119 etmp = hammer2_vfs_sync_pmp(pmp, MNT_WAIT); 1120 if (etmp && (error == 0 || error == ENOSPC)) 1121 error = etmp; 1122 break; 1123 } 1124 } 1125 lockmgr(&hammer2_mntlk, LK_RELEASE); 1126 1127 if (error && error != ENOSPC) 1128 goto failed; 1129 1130 /* 1131 * If we have an ENOSPC error we have to bulkfree on the live 1132 * topology. Otherwise we can bulkfree on a snapshot. 1133 */ 1134 if (error) { 1135 kprintf("hammer2: WARNING! Bulkfree forced to use live " 1136 "topology due to ENOSPC\n"); 1137 vchain = &hmp->vchain; 1138 hammer2_chain_ref(vchain); 1139 didsnap = 0; 1140 } else { 1141 vchain = hammer2_chain_bulksnap(hmp); 1142 didsnap = 1; 1143 } 1144 1145 /* 1146 * Normal bulkfree operations do not require a transaction because 1147 * they operate on a snapshot, and so can run concurrently with 1148 * any operation except another bulkfree. 1149 * 1150 * If we are running bulkfree on the live topology we have to be 1151 * in a FLUSH transaction. 1152 */ 1153 if (didsnap == 0) 1154 hammer2_trans_init(hmp->spmp, HAMMER2_TRANS_ISFLUSH); 1155 1156 if (bfi) { 1157 hammer2_thr_freeze(&hmp->bfthr); 1158 error = hammer2_bulkfree_pass(hmp, vchain, bfi); 1159 hammer2_thr_unfreeze(&hmp->bfthr); 1160 } 1161 if (didsnap) { 1162 hammer2_chain_bulkdrop(vchain); 1163 } else { 1164 hammer2_chain_drop(vchain); 1165 hammer2_trans_done(hmp->spmp, HAMMER2_TRANS_ISFLUSH | 1166 HAMMER2_TRANS_SIDEQ); 1167 } 1168 error = hammer2_error_to_errno(error); 1169 1170 failed: 1171 lockmgr(&hmp->bflock, LK_RELEASE); 1172 return error; 1173 } 1174 1175 /* 1176 * Unconditionally delete meta-data in a hammer2 filesystem 1177 */ 1178 static 1179 int 1180 hammer2_ioctl_destroy(hammer2_inode_t *ip, void *data) 1181 { 1182 hammer2_ioc_destroy_t *iocd = data; 1183 hammer2_pfs_t *pmp = ip->pmp; 1184 int error; 1185 1186 if (pmp->ronly) { 1187 error = EROFS; 1188 return error; 1189 } 1190 1191 switch(iocd->cmd) { 1192 case HAMMER2_DELETE_FILE: 1193 /* 1194 * Destroy a bad directory entry by name. Caller must 1195 * pass the directory as fd. 1196 */ 1197 { 1198 hammer2_xop_unlink_t *xop; 1199 1200 if (iocd->path[sizeof(iocd->path)-1]) { 1201 error = EINVAL; 1202 break; 1203 } 1204 if (ip->meta.type != HAMMER2_OBJTYPE_DIRECTORY) { 1205 error = EINVAL; 1206 break; 1207 } 1208 hammer2_pfs_memory_wait(pmp); 1209 hammer2_trans_init(pmp, 0); 1210 hammer2_inode_lock(ip, 0); 1211 1212 xop = hammer2_xop_alloc(ip, HAMMER2_XOP_MODIFYING); 1213 hammer2_xop_setname(&xop->head, iocd->path, strlen(iocd->path)); 1214 xop->isdir = -1; 1215 xop->dopermanent = H2DOPERM_PERMANENT | 1216 H2DOPERM_FORCE | 1217 H2DOPERM_IGNINO; 1218 hammer2_xop_start(&xop->head, &hammer2_unlink_desc); 1219 1220 error = hammer2_xop_collect(&xop->head, 0); 1221 error = hammer2_error_to_errno(error); 1222 hammer2_inode_unlock(ip); 1223 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1224 hammer2_trans_done(pmp, HAMMER2_TRANS_SIDEQ); 1225 } 1226 break; 1227 case HAMMER2_DELETE_INUM: 1228 /* 1229 * Destroy a bad inode by inode number. 1230 */ 1231 { 1232 hammer2_xop_lookup_t *xop; 1233 1234 if (iocd->inum < 1) { 1235 error = EINVAL; 1236 break; 1237 } 1238 hammer2_pfs_memory_wait(pmp); 1239 hammer2_trans_init(pmp, 0); 1240 1241 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING); 1242 xop->lhc = iocd->inum; 1243 hammer2_xop_start(&xop->head, &hammer2_delete_desc); 1244 error = hammer2_xop_collect(&xop->head, 0); 1245 error = hammer2_error_to_errno(error); 1246 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1247 hammer2_trans_done(pmp, HAMMER2_TRANS_SIDEQ); 1248 } 1249 break; 1250 default: 1251 error = EINVAL; 1252 break; 1253 } 1254 return error; 1255 } 1256 1257 /* 1258 * Grow a filesystem into its partition size 1259 */ 1260 static int 1261 hammer2_ioctl_growfs(hammer2_inode_t *ip, void *data, struct ucred *cred) 1262 { 1263 hammer2_ioc_growfs_t *grow = data; 1264 hammer2_dev_t *hmp; 1265 hammer2_off_t delta; 1266 hammer2_tid_t mtid; 1267 struct buf *bp; 1268 int error; 1269 int i; 1270 1271 hmp = ip->pmp->pfs_hmps[0]; 1272 1273 if (hmp->nvolumes > 1) { 1274 kprintf("hammer2: growfs currently unsupported " 1275 "with multiple volumes\n"); 1276 return EOPNOTSUPP; 1277 } 1278 1279 /* 1280 * Extract from disklabel 1281 */ 1282 grow->modified = 0; 1283 if (grow->size == 0) { 1284 struct partinfo part; 1285 struct vattr_lite va; 1286 1287 if (VOP_IOCTL(hmp->devvp, DIOCGPART, (void *)&part, 1288 0, cred, NULL) == 0) { 1289 grow->size = part.media_size; 1290 kprintf("hammer2: growfs partition-auto to %jd\n", 1291 (intmax_t)grow->size); 1292 } else if (VOP_GETATTR_LITE(hmp->devvp, &va) == 0) { 1293 grow->size = va.va_size; 1294 kprintf("hammer2: growfs fstat-auto to %jd\n", 1295 (intmax_t)grow->size); 1296 } else { 1297 return EINVAL; 1298 } 1299 } 1300 1301 /* 1302 * This is typically ~8MB alignment to avoid edge cases accessing 1303 * reserved blocks at the base of each 2GB zone. 1304 */ 1305 grow->size &= ~HAMMER2_VOLUME_ALIGNMASK64; 1306 delta = grow->size - hmp->voldata.volu_size; 1307 1308 /* 1309 * Maximum allowed size is 2^63 1310 */ 1311 if (grow->size > 0x7FFFFFFFFFFFFFFFLU) { 1312 kprintf("hammer2: growfs failure, limit is 2^63 - 1 bytes\n"); 1313 return EINVAL; 1314 } 1315 1316 /* 1317 * We can't shrink a filesystem 1318 */ 1319 if (grow->size < hmp->voldata.volu_size) { 1320 kprintf("hammer2: growfs failure, " 1321 "would shrink from %jd to %jd\n", 1322 (intmax_t)hmp->voldata.volu_size, 1323 (intmax_t)grow->size); 1324 return EINVAL; 1325 } 1326 1327 if (delta == 0) { 1328 kprintf("hammer2: growfs - size did not change\n"); 1329 return 0; 1330 } 1331 1332 /* 1333 * Clear any new volume header backups that we extend into. 1334 * Skip volume headers that are already part of the filesystem. 1335 */ 1336 for (i = 0; i < HAMMER2_NUM_VOLHDRS; ++i) { 1337 if (i * HAMMER2_ZONE_BYTES64 < hmp->voldata.volu_size) 1338 continue; 1339 if (i * HAMMER2_ZONE_BYTES64 >= grow->size) 1340 break; 1341 kprintf("hammer2: growfs - clear volhdr %d ", i); 1342 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64, 1343 HAMMER2_VOLUME_BYTES, &bp); 1344 if (error) { 1345 brelse(bp); 1346 kprintf("I/O error %d\n", error); 1347 return EINVAL; 1348 } 1349 bzero(bp->b_data, HAMMER2_VOLUME_BYTES); 1350 error = bwrite(bp); 1351 if (error) { 1352 kprintf("I/O error %d\n", error); 1353 return EINVAL; 1354 } 1355 kprintf("\n"); 1356 } 1357 1358 hammer2_trans_init(hmp->spmp, HAMMER2_TRANS_ISFLUSH); 1359 mtid = hammer2_trans_sub(hmp->spmp); 1360 1361 kprintf("hammer2: growfs - expand by %jd to %jd mtid %016jx\n", 1362 (intmax_t)delta, (intmax_t)grow->size, mtid); 1363 1364 1365 hammer2_voldata_lock(hmp); 1366 hammer2_voldata_modify(hmp); 1367 1368 /* 1369 * NOTE: Just adjusting total_size for a single-volume filesystem 1370 * or for the last volume in a multi-volume filesystem, is 1371 * fine. But we can't grow any other partition in a multi-volume 1372 * filesystem. For now we just punt (at the top) on any 1373 * multi-volume filesystem. 1374 */ 1375 hmp->voldata.volu_size = grow->size; 1376 hmp->voldata.total_size += delta; 1377 hmp->voldata.allocator_size += delta; 1378 hmp->voldata.allocator_free += delta; 1379 hmp->total_size += delta; 1380 hmp->volumes[0].size += delta; /* note: indexes first (only) volume */ 1381 1382 hammer2_voldata_unlock(hmp); 1383 1384 hammer2_trans_done(hmp->spmp, HAMMER2_TRANS_ISFLUSH | 1385 HAMMER2_TRANS_SIDEQ); 1386 grow->modified = 1; 1387 1388 /* 1389 * Flush the mess right here and now. We could just let the 1390 * filesystem syncer do it, but this was a sensitive operation 1391 * so don't take any chances. 1392 */ 1393 hammer2_vfs_sync(ip->pmp->mp, MNT_WAIT); 1394 1395 return 0; 1396 } 1397 1398 /* 1399 * Get a list of volumes. 1400 */ 1401 static int 1402 hammer2_ioctl_volume_list(hammer2_inode_t *ip, void *data) 1403 { 1404 hammer2_ioc_volume_list_t *vollist = data; 1405 hammer2_ioc_volume_t entry; 1406 hammer2_volume_t *vol; 1407 hammer2_dev_t *hmp; 1408 hammer2_pfs_t *pmp; 1409 int i, error = 0, cnt = 0; 1410 1411 pmp = ip->pmp; 1412 hmp = pmp->pfs_hmps[0]; 1413 if (hmp == NULL) 1414 return (EINVAL); 1415 1416 hammer2_voldata_lock(hmp); 1417 for (i = 0; i < hmp->nvolumes; ++i) { 1418 if (cnt >= vollist->nvolumes) 1419 break; 1420 vol = &hmp->volumes[i]; 1421 bzero(&entry, sizeof(entry)); 1422 /* copy hammer2_volume_t fields */ 1423 entry.id = vol->id; 1424 bcopy(vol->dev->path, entry.path, sizeof(entry.path)); 1425 entry.offset = vol->offset; 1426 entry.size = vol->size; 1427 error = copyout(&entry, &vollist->volumes[cnt], sizeof(entry)); 1428 if (error) 1429 goto failed; 1430 cnt++; 1431 } 1432 vollist->nvolumes = cnt; 1433 vollist->version = hmp->voldata.version; 1434 bcopy(pmp->pfs_names[0], vollist->pfs_name, sizeof(vollist->pfs_name)); 1435 failed: 1436 hammer2_voldata_unlock(hmp); 1437 1438 return error; 1439 } 1440