| 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_remote_get(hammer2_inode_t *ip, void *data); |
| 47 | static int hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data); |
| 48 | static int hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data); |
| 49 | static int hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data); |
| 50 | static int hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data); |
| 51 | static int hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data); |
| 52 | static int hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data); |
| 53 | static int hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data); |
| 54 | static int hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data); |
| 55 | |
| 56 | int |
| 57 | hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, int fflag, |
| 58 | struct ucred *cred) |
| 59 | { |
| 60 | int error; |
| 61 | |
| 62 | /* |
| 63 | * Standard root cred checks, will be selectively ignored below |
| 64 | * for ioctls that do not require root creds. |
| 65 | */ |
| 66 | error = priv_check_cred(cred, PRIV_HAMMER_IOCTL, 0); |
| 67 | |
| 68 | switch(com) { |
| 69 | case HAMMER2IOC_VERSION_GET: |
| 70 | error = hammer2_ioctl_version_get(ip, data); |
| 71 | break; |
| 72 | case HAMMER2IOC_REMOTE_GET: |
| 73 | if (error == 0) |
| 74 | error = hammer2_ioctl_remote_get(ip, data); |
| 75 | break; |
| 76 | case HAMMER2IOC_REMOTE_ADD: |
| 77 | if (error == 0) |
| 78 | error = hammer2_ioctl_remote_add(ip, data); |
| 79 | break; |
| 80 | case HAMMER2IOC_REMOTE_DEL: |
| 81 | if (error == 0) |
| 82 | error = hammer2_ioctl_remote_del(ip, data); |
| 83 | break; |
| 84 | case HAMMER2IOC_REMOTE_REP: |
| 85 | if (error == 0) |
| 86 | error = hammer2_ioctl_remote_rep(ip, data); |
| 87 | break; |
| 88 | case HAMMER2IOC_SOCKET_GET: |
| 89 | if (error == 0) |
| 90 | error = hammer2_ioctl_socket_get(ip, data); |
| 91 | break; |
| 92 | case HAMMER2IOC_SOCKET_SET: |
| 93 | if (error == 0) |
| 94 | error = hammer2_ioctl_socket_set(ip, data); |
| 95 | break; |
| 96 | case HAMMER2IOC_PFS_GET: |
| 97 | if (error == 0) |
| 98 | error = hammer2_ioctl_pfs_get(ip, data); |
| 99 | break; |
| 100 | case HAMMER2IOC_PFS_CREATE: |
| 101 | if (error == 0) |
| 102 | error = hammer2_ioctl_pfs_create(ip, data); |
| 103 | break; |
| 104 | case HAMMER2IOC_PFS_DELETE: |
| 105 | if (error == 0) |
| 106 | error = hammer2_ioctl_pfs_delete(ip, data); |
| 107 | break; |
| 108 | default: |
| 109 | error = EOPNOTSUPP; |
| 110 | break; |
| 111 | } |
| 112 | return (error); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * Retrieve version and basic info |
| 117 | */ |
| 118 | static int |
| 119 | hammer2_ioctl_version_get(hammer2_inode_t *ip, void *data) |
| 120 | { |
| 121 | hammer2_mount_t *hmp = ip->hmp; |
| 122 | hammer2_ioc_version_t *version = data; |
| 123 | |
| 124 | version->version = hmp->voldata.version; |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Retrieve information about a remote |
| 130 | */ |
| 131 | static int |
| 132 | hammer2_ioctl_remote_get(hammer2_inode_t *ip, void *data) |
| 133 | { |
| 134 | hammer2_mount_t *hmp = ip->hmp; |
| 135 | hammer2_ioc_remote_t *remote = data; |
| 136 | int copyid = remote->copyid; |
| 137 | |
| 138 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 139 | return (EINVAL); |
| 140 | |
| 141 | hammer2_voldata_lock(hmp); |
| 142 | remote->copy1 = hmp->voldata.copyinfo[copyid]; |
| 143 | hammer2_voldata_unlock(hmp); |
| 144 | |
| 145 | /* |
| 146 | * Adjust nextid (GET only) |
| 147 | */ |
| 148 | while (++copyid < HAMMER2_COPYID_COUNT && |
| 149 | hmp->voldata.copyinfo[copyid].copyid == 0) { |
| 150 | ++copyid; |
| 151 | } |
| 152 | if (copyid == HAMMER2_COPYID_COUNT) |
| 153 | remote->nextid = -1; |
| 154 | else |
| 155 | remote->nextid = copyid; |
| 156 | |
| 157 | return(0); |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * Add new remote entry |
| 162 | */ |
| 163 | static int |
| 164 | hammer2_ioctl_remote_add(hammer2_inode_t *ip, void *data) |
| 165 | { |
| 166 | hammer2_mount_t *hmp = ip->hmp; |
| 167 | hammer2_ioc_remote_t *remote = data; |
| 168 | int copyid = remote->copyid; |
| 169 | int error = 0; |
| 170 | |
| 171 | if (copyid >= HAMMER2_COPYID_COUNT) |
| 172 | return (EINVAL); |
| 173 | |
| 174 | hammer2_voldata_lock(hmp); |
| 175 | if (copyid < 0) { |
| 176 | for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { |
| 177 | if (hmp->voldata.copyinfo[copyid].copyid == 0) |
| 178 | break; |
| 179 | } |
| 180 | if (copyid == HAMMER2_COPYID_COUNT) { |
| 181 | error = ENOSPC; |
| 182 | goto failed; |
| 183 | } |
| 184 | } |
| 185 | hammer2_modify_volume(hmp); |
| 186 | kprintf("copyid %d\n", copyid); |
| 187 | remote->copy1.copyid = copyid; |
| 188 | hmp->voldata.copyinfo[copyid] = remote->copy1; |
| 189 | failed: |
| 190 | hammer2_voldata_unlock(hmp); |
| 191 | return (error); |
| 192 | } |
| 193 | |
| 194 | /* |
| 195 | * Delete existing remote entry |
| 196 | */ |
| 197 | static int |
| 198 | hammer2_ioctl_remote_del(hammer2_inode_t *ip, void *data) |
| 199 | { |
| 200 | hammer2_mount_t *hmp = ip->hmp; |
| 201 | hammer2_ioc_remote_t *remote = data; |
| 202 | int copyid = remote->copyid; |
| 203 | int error = 0; |
| 204 | |
| 205 | if (copyid >= HAMMER2_COPYID_COUNT) |
| 206 | return (EINVAL); |
| 207 | remote->copy1.path[sizeof(remote->copy1.path) - 1] = 0; |
| 208 | hammer2_voldata_lock(hmp); |
| 209 | if (copyid < 0) { |
| 210 | for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { |
| 211 | if (hmp->voldata.copyinfo[copyid].copyid == 0) |
| 212 | continue; |
| 213 | if (strcmp(remote->copy1.path, |
| 214 | hmp->voldata.copyinfo[copyid].path) == 0) { |
| 215 | break; |
| 216 | } |
| 217 | } |
| 218 | if (copyid == HAMMER2_COPYID_COUNT) { |
| 219 | error = ENOENT; |
| 220 | goto failed; |
| 221 | } |
| 222 | } |
| 223 | hammer2_modify_volume(hmp); |
| 224 | hmp->voldata.copyinfo[copyid].copyid = 0; |
| 225 | failed: |
| 226 | hammer2_voldata_unlock(hmp); |
| 227 | return (error); |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Replace existing remote entry |
| 232 | */ |
| 233 | static int |
| 234 | hammer2_ioctl_remote_rep(hammer2_inode_t *ip, void *data) |
| 235 | { |
| 236 | hammer2_mount_t *hmp = ip->hmp; |
| 237 | hammer2_ioc_remote_t *remote = data; |
| 238 | int copyid = remote->copyid; |
| 239 | |
| 240 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 241 | return (EINVAL); |
| 242 | |
| 243 | hammer2_voldata_lock(hmp); |
| 244 | hammer2_voldata_unlock(hmp); |
| 245 | |
| 246 | return(0); |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * Retrieve communications socket |
| 251 | */ |
| 252 | static int |
| 253 | hammer2_ioctl_socket_get(hammer2_inode_t *ip, void *data) |
| 254 | { |
| 255 | return (EOPNOTSUPP); |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * Set communications socket for connection |
| 260 | */ |
| 261 | static int |
| 262 | hammer2_ioctl_socket_set(hammer2_inode_t *ip, void *data) |
| 263 | { |
| 264 | hammer2_mount_t *hmp = ip->hmp; |
| 265 | hammer2_ioc_remote_t *remote = data; |
| 266 | int copyid = remote->copyid; |
| 267 | |
| 268 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 269 | return (EINVAL); |
| 270 | |
| 271 | hammer2_voldata_lock(hmp); |
| 272 | hammer2_voldata_unlock(hmp); |
| 273 | |
| 274 | return(0); |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * Used to scan PFSs, which are directories under the super-root. |
| 279 | */ |
| 280 | static int |
| 281 | hammer2_ioctl_pfs_get(hammer2_inode_t *ip, void *data) |
| 282 | { |
| 283 | hammer2_mount_t *hmp = ip->hmp; |
| 284 | hammer2_ioc_pfs_t *pfs = data; |
| 285 | hammer2_chain_t *parent; |
| 286 | hammer2_chain_t *chain; |
| 287 | hammer2_inode_t *xip; |
| 288 | int error = 0; |
| 289 | |
| 290 | parent = hmp->schain; |
| 291 | error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS); |
| 292 | if (error) |
| 293 | goto done; |
| 294 | |
| 295 | /* |
| 296 | * Search for the first key or specific key. Remember that keys |
| 297 | * can be returned in any order. |
| 298 | */ |
| 299 | if (pfs->name_key == 0) { |
| 300 | chain = hammer2_chain_lookup(hmp, &parent, |
| 301 | 0, (hammer2_key_t)-1, 0); |
| 302 | } else { |
| 303 | chain = hammer2_chain_lookup(hmp, &parent, |
| 304 | pfs->name_key, pfs->name_key, 0); |
| 305 | } |
| 306 | while (chain && chain->bref.type != HAMMER2_BREF_TYPE_INODE) { |
| 307 | chain = hammer2_chain_next(hmp, &parent, chain, |
| 308 | 0, (hammer2_key_t)-1, 0); |
| 309 | } |
| 310 | if (chain) { |
| 311 | /* |
| 312 | * Load the data being returned by the ioctl. |
| 313 | */ |
| 314 | xip = chain->u.ip; |
| 315 | pfs->name_key = xip->ip_data.name_key; |
| 316 | pfs->pfs_type = xip->ip_data.pfs_type; |
| 317 | pfs->pfs_id = xip->ip_data.pfs_id; |
| 318 | pfs->pfs_fsid = xip->ip_data.pfs_fsid; |
| 319 | KKASSERT(xip->ip_data.name_len < sizeof(pfs->name)); |
| 320 | bcopy(xip->ip_data.filename, pfs->name, |
| 321 | xip->ip_data.name_len); |
| 322 | pfs->name[xip->ip_data.name_len] = 0; |
| 323 | |
| 324 | /* |
| 325 | * Calculate the next field |
| 326 | */ |
| 327 | do { |
| 328 | chain = hammer2_chain_next(hmp, &parent, chain, |
| 329 | 0, (hammer2_key_t)-1, 0); |
| 330 | } while (chain && chain->bref.type != HAMMER2_BREF_TYPE_INODE); |
| 331 | if (chain) { |
| 332 | pfs->name_next = chain->u.ip->ip_data.name_key; |
| 333 | hammer2_chain_unlock(hmp, chain); |
| 334 | } else { |
| 335 | pfs->name_next = (hammer2_key_t)-1; |
| 336 | } |
| 337 | } else { |
| 338 | pfs->name_next = (hammer2_key_t)-1; |
| 339 | error = ENOENT; |
| 340 | } |
| 341 | done: |
| 342 | hammer2_chain_unlock(hmp, parent); |
| 343 | return (error); |
| 344 | } |
| 345 | |
| 346 | /* |
| 347 | * Create a new PFS under the super-root |
| 348 | */ |
| 349 | static int |
| 350 | hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data) |
| 351 | { |
| 352 | hammer2_mount_t *hmp = ip->hmp; |
| 353 | hammer2_ioc_pfs_t *pfs = data; |
| 354 | hammer2_inode_t *nip = NULL; |
| 355 | int error; |
| 356 | |
| 357 | pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure 0-termination */ |
| 358 | error = hammer2_inode_create(hmp->schain->u.ip, NULL, NULL, |
| 359 | pfs->name, strlen(pfs->name), |
| 360 | &nip); |
| 361 | if (error == 0) { |
| 362 | hammer2_chain_modify(hmp, &nip->chain, 0); |
| 363 | nip->ip_data.pfs_type = pfs->pfs_type; |
| 364 | nip->ip_data.pfs_id = pfs->pfs_id; |
| 365 | nip->ip_data.pfs_fsid = pfs->pfs_fsid; |
| 366 | hammer2_chain_unlock(hmp, &nip->chain); |
| 367 | } |
| 368 | return (error); |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * Destroy an existing PFS under the super-root |
| 373 | */ |
| 374 | static int |
| 375 | hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data) |
| 376 | { |
| 377 | hammer2_mount_t *hmp = ip->hmp; |
| 378 | hammer2_ioc_pfs_t *pfs = data; |
| 379 | int error; |
| 380 | |
| 381 | error = hammer2_unlink_file(hmp->schain->u.ip, |
| 382 | pfs->name, strlen(pfs->name), |
| 383 | 0, NULL); |
| 384 | return (error); |
| 385 | } |