1 /* 2 * Copyright (c) 2011-2013 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 static int hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data); 46 static int hammer2_ioctl_recluster(hammer2_inode_t *ip, void *data); 47 static int hammer2_ioctl_remote_scan(hammer2_inode_t *ip, void *data); 48 static int hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data); 49 static int hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data); 50 static int hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data); 51 static int hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data); 52 static int hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data); 53 static int hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data); 54 static int hammer2_ioctl_pfs_lookup(hammer2_inode_t *ip, void *data); 55 static int hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data); 56 static int hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data); 57 static int hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data); 58 static int hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data); 59 static int hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data); 60 61 int 62 hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, int fflag, 63 struct ucred *cred) 64 { 65 int error; 66 67 /* 68 * Standard root cred checks, will be selectively ignored below 69 * for ioctls that do not require root creds. 70 */ 71 error = priv_check_cred(cred, PRIV_HAMMER_IOCTL, 0); 72 73 switch(com) { 74 case HAMMER2IOC_VERSION_GET: 75 error = hammer2_ioctl_version_get(ip, data); 76 break; 77 case HAMMER2IOC_RECLUSTER: 78 if (error == 0) 79 error = hammer2_ioctl_recluster(ip, data); 80 break; 81 case HAMMER2IOC_REMOTE_SCAN: 82 if (error == 0) 83 error = hammer2_ioctl_remote_scan(ip, data); 84 break; 85 case HAMMER2IOC_REMOTE_ADD: 86 if (error == 0) 87 error = hammer2_ioctl_remote_add(ip, data); 88 break; 89 case HAMMER2IOC_REMOTE_DEL: 90 if (error == 0) 91 error = hammer2_ioctl_remote_del(ip, data); 92 break; 93 case HAMMER2IOC_REMOTE_REP: 94 if (error == 0) 95 error = hammer2_ioctl_remote_rep(ip, data); 96 break; 97 case HAMMER2IOC_SOCKET_GET: 98 if (error == 0) 99 error = hammer2_ioctl_socket_get(ip, data); 100 break; 101 case HAMMER2IOC_SOCKET_SET: 102 if (error == 0) 103 error = hammer2_ioctl_socket_set(ip, data); 104 break; 105 case HAMMER2IOC_PFS_GET: 106 if (error == 0) 107 error = hammer2_ioctl_pfs_get(ip, data); 108 break; 109 case HAMMER2IOC_PFS_LOOKUP: 110 if (error == 0) 111 error = hammer2_ioctl_pfs_lookup(ip, data); 112 break; 113 case HAMMER2IOC_PFS_CREATE: 114 if (error == 0) 115 error = hammer2_ioctl_pfs_create(ip, data); 116 break; 117 case HAMMER2IOC_PFS_DELETE: 118 if (error == 0) 119 error = hammer2_ioctl_pfs_delete(ip, data); 120 break; 121 case HAMMER2IOC_PFS_SNAPSHOT: 122 if (error == 0) 123 error = hammer2_ioctl_pfs_snapshot(ip, data); 124 break; 125 case HAMMER2IOC_INODE_GET: 126 error = hammer2_ioctl_inode_get(ip, data); 127 break; 128 case HAMMER2IOC_INODE_SET: 129 if (error == 0) 130 error = hammer2_ioctl_inode_set(ip, data); 131 break; 132 default: 133 error = EOPNOTSUPP; 134 break; 135 } 136 return (error); 137 } 138 139 /* 140 * Retrieve version and basic info 141 */ 142 static int 143 hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data) 144 { 145 hammer2_mount_t *hmp = ip->hmp; 146 hammer2_ioc_version_t *version = data; 147 148 version->version = hmp->voldata.version; 149 return 0; 150 } 151 152 static int 153 hammer2_ioctl_recluster(hammer2_inode_t *ip, void *data) 154 { 155 hammer2_ioc_recluster_t *recl = data; 156 struct file *fp; 157 158 fp = holdfp(curproc->p_fd, recl->fd, -1); 159 if (fp) { 160 kprintf("reconnect to cluster\n"); 161 hammer2_cluster_reconnect(ip->pmp, fp); 162 return 0; 163 } else { 164 return EINVAL; 165 } 166 } 167 168 /* 169 * Retrieve information about a remote 170 */ 171 static int 172 hammer2_ioctl_remote_scan(hammer2_inode_t *ip, void *data) 173 { 174 hammer2_mount_t *hmp = ip->hmp; 175 hammer2_ioc_remote_t *remote = data; 176 int copyid = remote->copyid; 177 178 if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) 179 return (EINVAL); 180 181 hammer2_voldata_lock(hmp); 182 remote->copy1 = hmp->voldata.copyinfo[copyid]; 183 hammer2_voldata_unlock(hmp, 0); 184 185 /* 186 * Adjust nextid (GET only) 187 */ 188 while (++copyid < HAMMER2_COPYID_COUNT && 189 hmp->voldata.copyinfo[copyid].copyid == 0) { 190 ; 191 } 192 if (copyid == HAMMER2_COPYID_COUNT) 193 remote->nextid = -1; 194 else 195 remote->nextid = copyid; 196 197 return(0); 198 } 199 200 /* 201 * Add new remote entry 202 */ 203 static int 204 hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data) 205 { 206 hammer2_mount_t *hmp = ip->hmp; 207 hammer2_pfsmount_t *pmp = ip->pmp; 208 hammer2_ioc_remote_t *remote = data; 209 int copyid = remote->copyid; 210 int error = 0; 211 212 if (copyid >= HAMMER2_COPYID_COUNT) 213 return (EINVAL); 214 215 hammer2_voldata_lock(hmp); 216 if (copyid < 0) { 217 for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { 218 if (hmp->voldata.copyinfo[copyid].copyid == 0) 219 break; 220 } 221 if (copyid == HAMMER2_COPYID_COUNT) { 222 error = ENOSPC; 223 goto failed; 224 } 225 } 226 hammer2_modify_volume(hmp); 227 remote->copy1.copyid = copyid; 228 hmp->voldata.copyinfo[copyid] = remote->copy1; 229 hammer2_volconf_update(pmp, copyid); 230 failed: 231 hammer2_voldata_unlock(hmp, 1); 232 return (error); 233 } 234 235 /* 236 * Delete existing remote entry 237 */ 238 static int 239 hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data) 240 { 241 hammer2_mount_t *hmp = ip->hmp; 242 hammer2_pfsmount_t *pmp = ip->pmp; 243 hammer2_ioc_remote_t *remote = data; 244 int copyid = remote->copyid; 245 int error = 0; 246 247 if (copyid >= HAMMER2_COPYID_COUNT) 248 return (EINVAL); 249 remote->copy1.path[sizeof(remote->copy1.path) - 1] = 0; 250 hammer2_voldata_lock(hmp); 251 if (copyid < 0) { 252 for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { 253 if (hmp->voldata.copyinfo[copyid].copyid == 0) 254 continue; 255 if (strcmp(remote->copy1.path, 256 hmp->voldata.copyinfo[copyid].path) == 0) { 257 break; 258 } 259 } 260 if (copyid == HAMMER2_COPYID_COUNT) { 261 error = ENOENT; 262 goto failed; 263 } 264 } 265 hammer2_modify_volume(hmp); 266 hmp->voldata.copyinfo[copyid].copyid = 0; 267 hammer2_volconf_update(pmp, copyid); 268 failed: 269 hammer2_voldata_unlock(hmp, 1); 270 return (error); 271 } 272 273 /* 274 * Replace existing remote entry 275 */ 276 static int 277 hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data) 278 { 279 hammer2_mount_t *hmp = ip->hmp; 280 hammer2_ioc_remote_t *remote = data; 281 int copyid = remote->copyid; 282 283 if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) 284 return (EINVAL); 285 286 hammer2_voldata_lock(hmp); 287 /*hammer2_volconf_update(pmp, copyid);*/ 288 hammer2_voldata_unlock(hmp, 1); 289 290 return(0); 291 } 292 293 /* 294 * Retrieve communications socket 295 */ 296 static int 297 hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data) 298 { 299 return (EOPNOTSUPP); 300 } 301 302 /* 303 * Set communications socket for connection 304 */ 305 static int 306 hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data) 307 { 308 hammer2_mount_t *hmp = ip->hmp; 309 hammer2_ioc_remote_t *remote = data; 310 int copyid = remote->copyid; 311 312 if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) 313 return (EINVAL); 314 315 hammer2_voldata_lock(hmp); 316 hammer2_voldata_unlock(hmp, 0); 317 318 return(0); 319 } 320 321 /* 322 * Used to scan and retrieve PFS information. PFS's are directories under 323 * the super-root. 324 * 325 * To scan PFSs pass name_key=0. The function will scan for the next 326 * PFS and set all fields, as well as set name_next to the next key. 327 * When no PFSs remain, name_next is set to (hammer2_key_t)-1. 328 * 329 * To retrieve the PFS associated with the file descriptor, pass 330 * name_key set to (hammer2_key_t)-1. 331 */ 332 static int 333 hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data) 334 { 335 hammer2_inode_data_t *ipdata; 336 hammer2_mount_t *hmp; 337 hammer2_ioc_pfs_t *pfs; 338 hammer2_chain_t *parent; 339 hammer2_chain_t *chain; 340 hammer2_chain_t *rchain; 341 int error; 342 343 error = 0; 344 hmp = ip->hmp; 345 pfs = data; 346 parent = hammer2_chain_lookup_init(hmp->schain, 0); 347 rchain = ip->pmp->rchain; 348 349 /* 350 * Search for the first key or specific key. Remember that keys 351 * can be returned in any order. 352 */ 353 if (pfs->name_key == 0) { 354 chain = hammer2_chain_lookup(&parent, 355 0, (hammer2_key_t)-1, 0); 356 } else if (pfs->name_key == (hammer2_key_t)-1) { 357 chain = hammer2_chain_lookup(&parent, 358 rchain->data->ipdata.name_key, 359 rchain->data->ipdata.name_key, 360 0); 361 } else { 362 chain = hammer2_chain_lookup(&parent, 363 pfs->name_key, pfs->name_key, 0); 364 } 365 while (chain && chain->bref.type != HAMMER2_BREF_TYPE_INODE) { 366 chain = hammer2_chain_next(&parent, chain, 367 0, (hammer2_key_t)-1, 0); 368 } 369 if (chain) { 370 /* 371 * Load the data being returned by the ioctl. 372 */ 373 ipdata = &chain->data->ipdata; 374 pfs->name_key = ipdata->name_key; 375 pfs->pfs_type = ipdata->pfs_type; 376 pfs->pfs_clid = ipdata->pfs_clid; 377 pfs->pfs_fsid = ipdata->pfs_fsid; 378 KKASSERT(ipdata->name_len < sizeof(pfs->name)); 379 bcopy(ipdata->filename, pfs->name, ipdata->name_len); 380 pfs->name[ipdata->name_len] = 0; 381 ipdata = NULL; /* safety */ 382 383 /* 384 * Calculate the next field 385 */ 386 do { 387 chain = hammer2_chain_next(&parent, chain, 388 0, (hammer2_key_t)-1, 0); 389 } while (chain && chain->bref.type != HAMMER2_BREF_TYPE_INODE); 390 if (chain) { 391 pfs->name_next = chain->data->ipdata.name_key; 392 hammer2_chain_unlock(chain); 393 } else { 394 pfs->name_next = (hammer2_key_t)-1; 395 } 396 } else { 397 pfs->name_next = (hammer2_key_t)-1; 398 error = ENOENT; 399 } 400 hammer2_chain_lookup_done(parent); 401 402 return (error); 403 } 404 405 /* 406 * Find a specific PFS by name 407 */ 408 static int 409 hammer2_ioctl_pfs_lookup(hammer2_inode_t *ip, void *data) 410 { 411 hammer2_inode_data_t *ipdata; 412 hammer2_mount_t *hmp; 413 hammer2_ioc_pfs_t *pfs; 414 hammer2_chain_t *parent; 415 hammer2_chain_t *chain; 416 hammer2_key_t lhc; 417 int error; 418 size_t len; 419 420 error = 0; 421 hmp = ip->hmp; 422 pfs = data; 423 parent = hammer2_chain_lookup_init(hmp->schain, HAMMER2_LOOKUP_SHARED); 424 425 pfs->name[sizeof(pfs->name) - 1] = 0; 426 len = strlen(pfs->name); 427 lhc = hammer2_dirhash(pfs->name, len); 428 429 chain = hammer2_chain_lookup(&parent, 430 lhc, lhc + HAMMER2_DIRHASH_LOMASK, 431 HAMMER2_LOOKUP_SHARED); 432 while (chain) { 433 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && 434 len == chain->data->ipdata.name_len && 435 bcmp(pfs->name, chain->data->ipdata.filename, len) == 0) { 436 break; 437 } 438 chain = hammer2_chain_next(&parent, chain, 439 lhc, lhc + HAMMER2_DIRHASH_LOMASK, 440 HAMMER2_LOOKUP_SHARED); 441 } 442 443 /* 444 * Load the data being returned by the ioctl. 445 */ 446 if (chain) { 447 ipdata = &chain->data->ipdata; 448 pfs->name_key = ipdata->name_key; 449 pfs->pfs_type = ipdata->pfs_type; 450 pfs->pfs_clid = ipdata->pfs_clid; 451 pfs->pfs_fsid = ipdata->pfs_fsid; 452 ipdata = NULL; 453 454 hammer2_chain_unlock(chain); 455 } else { 456 error = ENOENT; 457 } 458 hammer2_chain_lookup_done(parent); 459 return (error); 460 } 461 462 /* 463 * Create a new PFS under the super-root 464 */ 465 static int 466 hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data) 467 { 468 hammer2_inode_data_t *nipdata; 469 hammer2_mount_t *hmp; 470 hammer2_ioc_pfs_t *pfs; 471 hammer2_inode_t *nip; 472 hammer2_chain_t *nchain; 473 hammer2_trans_t trans; 474 int error; 475 476 hmp = ip->hmp; 477 pfs = data; 478 nip = NULL; 479 480 if (pfs->name[0] == 0) 481 return(EINVAL); 482 pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure 0-termination */ 483 484 hammer2_trans_init(&trans, hmp, ip, 0); 485 nip = hammer2_inode_create(&trans, hmp->sroot, NULL, NULL, 486 pfs->name, strlen(pfs->name), 487 &nchain, &error); 488 if (error == 0) { 489 nipdata = hammer2_chain_modify_ip(&trans, nip, &nchain, 490 HAMMER2_MODIFY_ASSERTNOCOPY); 491 nipdata->pfs_type = pfs->pfs_type; 492 nipdata->pfs_clid = pfs->pfs_clid; 493 nipdata->pfs_fsid = pfs->pfs_fsid; 494 hammer2_inode_unlock_ex(nip, nchain); 495 } 496 hammer2_trans_done(&trans); 497 return (error); 498 } 499 500 /* 501 * Destroy an existing PFS under the super-root 502 */ 503 static int 504 hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data) 505 { 506 hammer2_mount_t *hmp = ip->hmp; 507 hammer2_ioc_pfs_t *pfs = data; 508 hammer2_trans_t trans; 509 int error; 510 511 hammer2_trans_init(&trans, hmp, ip, 0); 512 error = hammer2_unlink_file(&trans, hmp->sroot, 513 pfs->name, strlen(pfs->name), 514 2, NULL); 515 hammer2_trans_done(&trans); 516 517 return (error); 518 } 519 520 static int 521 hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data) 522 { 523 hammer2_mount_t *hmp = ip->hmp; 524 hammer2_ioc_pfs_t *pfs = data; 525 hammer2_trans_t trans; 526 hammer2_chain_t *parent; 527 int error; 528 529 if (pfs->name[0] == 0) 530 return(EINVAL); 531 if (pfs->name[sizeof(pfs->name)-1] != 0) 532 return(EINVAL); 533 534 hammer2_trans_init(&trans, hmp, ip, 0); 535 parent = hammer2_inode_lock_ex(ip); 536 error = hammer2_chain_snapshot(&trans, ip, pfs); 537 hammer2_inode_unlock_ex(ip, parent); 538 hammer2_trans_done(&trans); 539 540 return (error); 541 } 542 543 /* 544 * Retrieve the raw inode structure 545 */ 546 static int 547 hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data) 548 { 549 hammer2_ioc_inode_t *ino = data; 550 hammer2_chain_t *parent; 551 552 parent = hammer2_inode_lock_sh(ip); 553 ino->ip_data = ip->chain->data->ipdata; 554 ino->kdata = ip; 555 hammer2_inode_unlock_sh(ip, parent); 556 557 return (0); 558 } 559 560 static int 561 hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data) 562 { 563 hammer2_ioc_inode_t *ino = data; 564 hammer2_chain_t *parent; 565 int error = EINVAL; 566 567 parent = hammer2_inode_lock_ex(ip); 568 if (ino->flags & HAMMER2IOC_INODE_FLAG_IQUOTA) { 569 } 570 if (ino->flags & HAMMER2IOC_INODE_FLAG_DQUOTA) { 571 } 572 if (ino->flags & HAMMER2IOC_INODE_FLAG_COPIES) { 573 } 574 hammer2_inode_unlock_ex(ip, parent); 575 576 return (error); 577 } 578