| 1 | /* |
| 2 | * Copyright (c) 2011-2012 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_delete(hammer2_inode_t *ip, void *data); |
| 57 | static int hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data); |
| 58 | static int hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data); |
| 59 | |
| 60 | int |
| 61 | hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, int fflag, |
| 62 | struct ucred *cred) |
| 63 | { |
| 64 | int error; |
| 65 | |
| 66 | /* |
| 67 | * Standard root cred checks, will be selectively ignored below |
| 68 | * for ioctls that do not require root creds. |
| 69 | */ |
| 70 | error = priv_check_cred(cred, PRIV_HAMMER_IOCTL, 0); |
| 71 | |
| 72 | switch(com) { |
| 73 | case HAMMER2IOC_VERSION_GET: |
| 74 | error = hammer2_ioctl_version_get(ip, data); |
| 75 | break; |
| 76 | case HAMMER2IOC_RECLUSTER: |
| 77 | if (error == 0) |
| 78 | error = hammer2_ioctl_recluster(ip, data); |
| 79 | break; |
| 80 | case HAMMER2IOC_REMOTE_SCAN: |
| 81 | if (error == 0) |
| 82 | error = hammer2_ioctl_remote_scan(ip, data); |
| 83 | break; |
| 84 | case HAMMER2IOC_REMOTE_ADD: |
| 85 | if (error == 0) |
| 86 | error = hammer2_ioctl_remote_add(ip, data); |
| 87 | break; |
| 88 | case HAMMER2IOC_REMOTE_DEL: |
| 89 | if (error == 0) |
| 90 | error = hammer2_ioctl_remote_del(ip, data); |
| 91 | break; |
| 92 | case HAMMER2IOC_REMOTE_REP: |
| 93 | if (error == 0) |
| 94 | error = hammer2_ioctl_remote_rep(ip, data); |
| 95 | break; |
| 96 | case HAMMER2IOC_SOCKET_GET: |
| 97 | if (error == 0) |
| 98 | error = hammer2_ioctl_socket_get(ip, data); |
| 99 | break; |
| 100 | case HAMMER2IOC_SOCKET_SET: |
| 101 | if (error == 0) |
| 102 | error = hammer2_ioctl_socket_set(ip, data); |
| 103 | break; |
| 104 | case HAMMER2IOC_PFS_GET: |
| 105 | if (error == 0) |
| 106 | error = hammer2_ioctl_pfs_get(ip, data); |
| 107 | break; |
| 108 | case HAMMER2IOC_PFS_LOOKUP: |
| 109 | if (error == 0) |
| 110 | error = hammer2_ioctl_pfs_lookup(ip, data); |
| 111 | break; |
| 112 | case HAMMER2IOC_PFS_CREATE: |
| 113 | if (error == 0) |
| 114 | error = hammer2_ioctl_pfs_create(ip, data); |
| 115 | break; |
| 116 | case HAMMER2IOC_PFS_DELETE: |
| 117 | if (error == 0) |
| 118 | error = hammer2_ioctl_pfs_delete(ip, data); |
| 119 | break; |
| 120 | case HAMMER2IOC_INODE_GET: |
| 121 | error = hammer2_ioctl_inode_get(ip, data); |
| 122 | break; |
| 123 | case HAMMER2IOC_INODE_SET: |
| 124 | if (error == 0) |
| 125 | error = hammer2_ioctl_inode_set(ip, data); |
| 126 | break; |
| 127 | default: |
| 128 | error = EOPNOTSUPP; |
| 129 | break; |
| 130 | } |
| 131 | return (error); |
| 132 | } |
| 133 | |
| 134 | /* |
| 135 | * Retrieve version and basic info |
| 136 | */ |
| 137 | static int |
| 138 | hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data) |
| 139 | { |
| 140 | hammer2_mount_t *hmp = ip->hmp; |
| 141 | hammer2_ioc_version_t *version = data; |
| 142 | |
| 143 | version->version = hmp->voldata.version; |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | static int |
| 148 | hammer2_ioctl_recluster(hammer2_inode_t *ip, void *data) |
| 149 | { |
| 150 | hammer2_ioc_recluster_t *recl = data; |
| 151 | struct file *fp; |
| 152 | |
| 153 | fp = holdfp(curproc->p_fd, recl->fd, -1); |
| 154 | if (fp) { |
| 155 | kprintf("reconnect to cluster\n"); |
| 156 | hammer2_cluster_reconnect(ip->pmp, fp); |
| 157 | return 0; |
| 158 | } else { |
| 159 | return EINVAL; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * Retrieve information about a remote |
| 165 | */ |
| 166 | static int |
| 167 | hammer2_ioctl_remote_scan(hammer2_inode_t *ip, void *data) |
| 168 | { |
| 169 | hammer2_mount_t *hmp = ip->hmp; |
| 170 | hammer2_ioc_remote_t *remote = data; |
| 171 | int copyid = remote->copyid; |
| 172 | |
| 173 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 174 | return (EINVAL); |
| 175 | |
| 176 | hammer2_voldata_lock(hmp); |
| 177 | remote->copy1 = hmp->voldata.copyinfo[copyid]; |
| 178 | hammer2_voldata_unlock(hmp); |
| 179 | |
| 180 | /* |
| 181 | * Adjust nextid (GET only) |
| 182 | */ |
| 183 | while (++copyid < HAMMER2_COPYID_COUNT && |
| 184 | hmp->voldata.copyinfo[copyid].copyid == 0) { |
| 185 | ; |
| 186 | } |
| 187 | if (copyid == HAMMER2_COPYID_COUNT) |
| 188 | remote->nextid = -1; |
| 189 | else |
| 190 | remote->nextid = copyid; |
| 191 | |
| 192 | return(0); |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Add new remote entry |
| 197 | */ |
| 198 | static int |
| 199 | hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data) |
| 200 | { |
| 201 | hammer2_mount_t *hmp = ip->hmp; |
| 202 | hammer2_pfsmount_t *pmp = ip->pmp; |
| 203 | hammer2_ioc_remote_t *remote = data; |
| 204 | int copyid = remote->copyid; |
| 205 | int error = 0; |
| 206 | |
| 207 | if (copyid >= HAMMER2_COPYID_COUNT) |
| 208 | return (EINVAL); |
| 209 | |
| 210 | hammer2_voldata_lock(hmp); |
| 211 | if (copyid < 0) { |
| 212 | for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { |
| 213 | if (hmp->voldata.copyinfo[copyid].copyid == 0) |
| 214 | break; |
| 215 | } |
| 216 | if (copyid == HAMMER2_COPYID_COUNT) { |
| 217 | error = ENOSPC; |
| 218 | goto failed; |
| 219 | } |
| 220 | } |
| 221 | hammer2_modify_volume(hmp); |
| 222 | remote->copy1.copyid = copyid; |
| 223 | hmp->voldata.copyinfo[copyid] = remote->copy1; |
| 224 | hammer2_volconf_update(pmp, copyid); |
| 225 | failed: |
| 226 | hammer2_voldata_unlock(hmp); |
| 227 | return (error); |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Delete existing remote entry |
| 232 | */ |
| 233 | static int |
| 234 | hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data) |
| 235 | { |
| 236 | hammer2_mount_t *hmp = ip->hmp; |
| 237 | hammer2_pfsmount_t *pmp = ip->pmp; |
| 238 | hammer2_ioc_remote_t *remote = data; |
| 239 | int copyid = remote->copyid; |
| 240 | int error = 0; |
| 241 | |
| 242 | if (copyid >= HAMMER2_COPYID_COUNT) |
| 243 | return (EINVAL); |
| 244 | remote->copy1.path[sizeof(remote->copy1.path) - 1] = 0; |
| 245 | hammer2_voldata_lock(hmp); |
| 246 | if (copyid < 0) { |
| 247 | for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { |
| 248 | if (hmp->voldata.copyinfo[copyid].copyid == 0) |
| 249 | continue; |
| 250 | if (strcmp(remote->copy1.path, |
| 251 | hmp->voldata.copyinfo[copyid].path) == 0) { |
| 252 | break; |
| 253 | } |
| 254 | } |
| 255 | if (copyid == HAMMER2_COPYID_COUNT) { |
| 256 | error = ENOENT; |
| 257 | goto failed; |
| 258 | } |
| 259 | } |
| 260 | hammer2_modify_volume(hmp); |
| 261 | hmp->voldata.copyinfo[copyid].copyid = 0; |
| 262 | hammer2_volconf_update(pmp, copyid); |
| 263 | failed: |
| 264 | hammer2_voldata_unlock(hmp); |
| 265 | return (error); |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * Replace existing remote entry |
| 270 | */ |
| 271 | static int |
| 272 | hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data) |
| 273 | { |
| 274 | hammer2_mount_t *hmp = ip->hmp; |
| 275 | hammer2_ioc_remote_t *remote = data; |
| 276 | int copyid = remote->copyid; |
| 277 | |
| 278 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 279 | return (EINVAL); |
| 280 | |
| 281 | hammer2_voldata_lock(hmp); |
| 282 | /*hammer2_volconf_update(pmp, copyid);*/ |
| 283 | hammer2_voldata_unlock(hmp); |
| 284 | |
| 285 | return(0); |
| 286 | } |
| 287 | |
| 288 | /* |
| 289 | * Retrieve communications socket |
| 290 | */ |
| 291 | static int |
| 292 | hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data) |
| 293 | { |
| 294 | return (EOPNOTSUPP); |
| 295 | } |
| 296 | |
| 297 | /* |
| 298 | * Set communications socket for connection |
| 299 | */ |
| 300 | static int |
| 301 | hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data) |
| 302 | { |
| 303 | hammer2_mount_t *hmp = ip->hmp; |
| 304 | hammer2_ioc_remote_t *remote = data; |
| 305 | int copyid = remote->copyid; |
| 306 | |
| 307 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 308 | return (EINVAL); |
| 309 | |
| 310 | hammer2_voldata_lock(hmp); |
| 311 | hammer2_voldata_unlock(hmp); |
| 312 | |
| 313 | return(0); |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Used to scan PFSs, which are directories under the super-root. |
| 318 | */ |
| 319 | static int |
| 320 | hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data) |
| 321 | { |
| 322 | hammer2_mount_t *hmp = ip->hmp; |
| 323 | hammer2_ioc_pfs_t *pfs = data; |
| 324 | hammer2_chain_t *parent; |
| 325 | hammer2_chain_t *chain; |
| 326 | hammer2_inode_t *xip; |
| 327 | int error = 0; |
| 328 | |
| 329 | parent = hmp->schain; |
| 330 | error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS); |
| 331 | if (error) |
| 332 | goto done; |
| 333 | |
| 334 | /* |
| 335 | * Search for the first key or specific key. Remember that keys |
| 336 | * can be returned in any order. |
| 337 | */ |
| 338 | if (pfs->name_key == 0) { |
| 339 | chain = hammer2_chain_lookup(hmp, &parent, |
| 340 | 0, (hammer2_key_t)-1, 0); |
| 341 | } else { |
| 342 | chain = hammer2_chain_lookup(hmp, &parent, |
| 343 | pfs->name_key, pfs->name_key, 0); |
| 344 | } |
| 345 | while (chain && chain->bref.type != HAMMER2_BREF_TYPE_INODE) { |
| 346 | chain = hammer2_chain_next(hmp, &parent, chain, |
| 347 | 0, (hammer2_key_t)-1, 0); |
| 348 | } |
| 349 | if (chain) { |
| 350 | /* |
| 351 | * Load the data being returned by the ioctl. |
| 352 | */ |
| 353 | xip = chain->u.ip; |
| 354 | pfs->name_key = xip->ip_data.name_key; |
| 355 | pfs->pfs_type = xip->ip_data.pfs_type; |
| 356 | pfs->pfs_clid = xip->ip_data.pfs_clid; |
| 357 | pfs->pfs_fsid = xip->ip_data.pfs_fsid; |
| 358 | KKASSERT(xip->ip_data.name_len < sizeof(pfs->name)); |
| 359 | bcopy(xip->ip_data.filename, pfs->name, |
| 360 | xip->ip_data.name_len); |
| 361 | pfs->name[xip->ip_data.name_len] = 0; |
| 362 | |
| 363 | /* |
| 364 | * Calculate the next field |
| 365 | */ |
| 366 | do { |
| 367 | chain = hammer2_chain_next(hmp, &parent, chain, |
| 368 | 0, (hammer2_key_t)-1, 0); |
| 369 | } while (chain && chain->bref.type != HAMMER2_BREF_TYPE_INODE); |
| 370 | if (chain) { |
| 371 | pfs->name_next = chain->u.ip->ip_data.name_key; |
| 372 | hammer2_chain_unlock(hmp, chain); |
| 373 | } else { |
| 374 | pfs->name_next = (hammer2_key_t)-1; |
| 375 | } |
| 376 | } else { |
| 377 | pfs->name_next = (hammer2_key_t)-1; |
| 378 | error = ENOENT; |
| 379 | } |
| 380 | done: |
| 381 | hammer2_chain_unlock(hmp, parent); |
| 382 | return (error); |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Find a specific PFS by name |
| 387 | */ |
| 388 | static int |
| 389 | hammer2_ioctl_pfs_lookup(hammer2_inode_t *ip, void *data) |
| 390 | { |
| 391 | hammer2_mount_t *hmp = ip->hmp; |
| 392 | hammer2_ioc_pfs_t *pfs = data; |
| 393 | hammer2_chain_t *parent; |
| 394 | hammer2_chain_t *chain; |
| 395 | hammer2_inode_t *xip; |
| 396 | hammer2_key_t lhc; |
| 397 | int error = 0; |
| 398 | size_t len; |
| 399 | |
| 400 | parent = hmp->schain; |
| 401 | error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS | |
| 402 | HAMMER2_RESOLVE_SHARED); |
| 403 | if (error) |
| 404 | goto done; |
| 405 | |
| 406 | pfs->name[sizeof(pfs->name) - 1] = 0; |
| 407 | len = strlen(pfs->name); |
| 408 | lhc = hammer2_dirhash(pfs->name, len); |
| 409 | |
| 410 | chain = hammer2_chain_lookup(hmp, &parent, |
| 411 | lhc, lhc + HAMMER2_DIRHASH_LOMASK, |
| 412 | HAMMER2_LOOKUP_SHARED); |
| 413 | while (chain) { |
| 414 | if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && |
| 415 | chain->u.ip && |
| 416 | len == chain->data->ipdata.name_len && |
| 417 | bcmp(pfs->name, chain->data->ipdata.filename, len) == 0) { |
| 418 | break; |
| 419 | } |
| 420 | chain = hammer2_chain_next(hmp, &parent, chain, |
| 421 | lhc, lhc + HAMMER2_DIRHASH_LOMASK, |
| 422 | HAMMER2_LOOKUP_SHARED); |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * Load the data being returned by the ioctl. |
| 427 | */ |
| 428 | if (chain) { |
| 429 | xip = chain->u.ip; |
| 430 | pfs->name_key = xip->ip_data.name_key; |
| 431 | pfs->pfs_type = xip->ip_data.pfs_type; |
| 432 | pfs->pfs_clid = xip->ip_data.pfs_clid; |
| 433 | pfs->pfs_fsid = xip->ip_data.pfs_fsid; |
| 434 | |
| 435 | hammer2_chain_unlock(hmp, chain); |
| 436 | } else { |
| 437 | error = ENOENT; |
| 438 | } |
| 439 | done: |
| 440 | hammer2_chain_unlock(hmp, parent); |
| 441 | return (error); |
| 442 | } |
| 443 | |
| 444 | /* |
| 445 | * Create a new PFS under the super-root |
| 446 | */ |
| 447 | static int |
| 448 | hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data) |
| 449 | { |
| 450 | hammer2_mount_t *hmp = ip->hmp; |
| 451 | hammer2_ioc_pfs_t *pfs = data; |
| 452 | hammer2_inode_t *nip = NULL; |
| 453 | int error; |
| 454 | |
| 455 | pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure 0-termination */ |
| 456 | error = hammer2_inode_create(hmp->schain->u.ip, NULL, NULL, |
| 457 | pfs->name, strlen(pfs->name), |
| 458 | &nip); |
| 459 | if (error == 0) { |
| 460 | hammer2_chain_modify(hmp, &nip->chain, 0); |
| 461 | nip->ip_data.pfs_type = pfs->pfs_type; |
| 462 | nip->ip_data.pfs_clid = pfs->pfs_clid; |
| 463 | nip->ip_data.pfs_fsid = pfs->pfs_fsid; |
| 464 | hammer2_chain_unlock(hmp, &nip->chain); |
| 465 | } |
| 466 | return (error); |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * Destroy an existing PFS under the super-root |
| 471 | */ |
| 472 | static int |
| 473 | hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data) |
| 474 | { |
| 475 | hammer2_mount_t *hmp = ip->hmp; |
| 476 | hammer2_ioc_pfs_t *pfs = data; |
| 477 | int error; |
| 478 | |
| 479 | error = hammer2_unlink_file(hmp->schain->u.ip, |
| 480 | pfs->name, strlen(pfs->name), |
| 481 | 0, NULL); |
| 482 | return (error); |
| 483 | } |
| 484 | |
| 485 | /* |
| 486 | * Retrieve the raw inode structure |
| 487 | */ |
| 488 | static int |
| 489 | hammer2_ioctl_inode_get(hammer2_inode_t *ip, void *data) |
| 490 | { |
| 491 | hammer2_ioc_inode_t *ino = data; |
| 492 | |
| 493 | hammer2_inode_lock_sh(ip); |
| 494 | ino->ip_data = ip->ip_data; |
| 495 | ino->kdata = ip; |
| 496 | hammer2_inode_unlock_sh(ip); |
| 497 | return (0); |
| 498 | } |
| 499 | |
| 500 | static int |
| 501 | hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data) |
| 502 | { |
| 503 | hammer2_ioc_inode_t *ino = data; |
| 504 | int error = EINVAL; |
| 505 | |
| 506 | hammer2_inode_lock_ex(ip); |
| 507 | if (ino->flags & HAMMER2IOC_INODE_FLAG_IQUOTA) { |
| 508 | } |
| 509 | if (ino->flags & HAMMER2IOC_INODE_FLAG_DQUOTA) { |
| 510 | } |
| 511 | if (ino->flags & HAMMER2IOC_INODE_FLAG_COPIES) { |
| 512 | } |
| 513 | hammer2_inode_unlock_ex(ip); |
| 514 | return (error); |
| 515 | } |