1/*- 2 * Copyright (c) 1999 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> |
30__FBSDID("$FreeBSD: head/sys/compat/linux/linux_mib.c 192895 2009-05-27 14:11:23Z jamie $"); |
31 32#include <sys/param.h> 33#include <sys/kernel.h> 34#include <sys/systm.h> 35#include <sys/sysctl.h> 36#include <sys/proc.h> 37#include <sys/malloc.h> 38#include <sys/mount.h> --- 13 unchanged lines hidden (view full) --- 52 53struct linux_prison { 54 char pr_osname[LINUX_MAX_UTSNAME]; 55 char pr_osrelease[LINUX_MAX_UTSNAME]; 56 int pr_oss_version; 57 int pr_osrel; 58}; 59 |
60static struct linux_prison lprison0 = { 61 .pr_osname = "Linux", 62 .pr_osrelease = "2.6.16", 63 .pr_oss_version = 0x030600, 64 .pr_osrel = 2006016 65}; 66 |
67static unsigned linux_osd_jail_slot; 68 69SYSCTL_NODE(_compat, OID_AUTO, linux, CTLFLAG_RW, 0, 70 "Linux mode"); 71 |
72static int 73linux_sysctl_osname(SYSCTL_HANDLER_ARGS) 74{ 75 char osname[LINUX_MAX_UTSNAME]; 76 int error; 77 78 linux_get_osname(req->td, osname); 79 error = sysctl_handle_string(oidp, osname, LINUX_MAX_UTSNAME, req); 80 if (error || req->newptr == NULL) 81 return (error); 82 error = linux_set_osname(req->td, osname); 83 return (error); 84} 85 86SYSCTL_PROC(_compat_linux, OID_AUTO, osname, 87 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 88 0, 0, linux_sysctl_osname, "A", 89 "Linux kernel OS name"); 90 |
91static int 92linux_sysctl_osrelease(SYSCTL_HANDLER_ARGS) 93{ 94 char osrelease[LINUX_MAX_UTSNAME]; 95 int error; 96 97 linux_get_osrelease(req->td, osrelease); 98 error = sysctl_handle_string(oidp, osrelease, LINUX_MAX_UTSNAME, req); 99 if (error || req->newptr == NULL) 100 return (error); 101 error = linux_set_osrelease(req->td, osrelease); 102 return (error); 103} 104 105SYSCTL_PROC(_compat_linux, OID_AUTO, osrelease, 106 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 107 0, 0, linux_sysctl_osrelease, "A", 108 "Linux kernel OS release"); 109 |
110static int 111linux_sysctl_oss_version(SYSCTL_HANDLER_ARGS) 112{ 113 int oss_version; 114 int error; 115 116 oss_version = linux_get_oss_version(req->td); 117 error = sysctl_handle_int(oidp, &oss_version, 0, req); --- 35 unchanged lines hidden (view full) --- 153 if (v < 1000000) 154 return (EINVAL); 155 156 *osrel = v; 157 return (0); 158} 159 160/* |
161 * Find a prison with Linux info. 162 * Return the Linux info and the (locked) prison. |
163 */ 164static struct linux_prison * |
165linux_find_prison(struct prison *spr, struct prison **prp) |
166{ 167 struct prison *pr; 168 struct linux_prison *lpr; 169 |
170 if (!linux_osd_jail_slot) 171 /* In case osd_register failed. */ 172 spr = &prison0; 173 for (pr = spr;; pr = pr->pr_parent) { 174 mtx_lock(&pr->pr_mtx); 175 lpr = (pr == &prison0) 176 ? &lprison0 177 : osd_jail_get(pr, linux_osd_jail_slot); 178 if (lpr != NULL) 179 break; |
180 mtx_unlock(&pr->pr_mtx); |
181 } 182 *prp = pr; |
183 return (lpr); 184} 185 186/* |
187 * Ensure a prison has its own Linux info. If lprp is non-null, point it to 188 * the Linux info and lock the prison. |
189 */ 190static int 191linux_alloc_prison(struct prison *pr, struct linux_prison **lprp) 192{ |
193 struct prison *ppr; |
194 struct linux_prison *lpr, *nlpr; 195 int error; 196 197 /* If this prison already has Linux info, return that. */ 198 error = 0; |
199 lpr = linux_find_prison(pr, &ppr); 200 if (ppr == pr) |
201 goto done; 202 /* 203 * Allocate a new info record. Then check again, in case something 204 * changed during the allocation. 205 */ |
206 mtx_unlock(&ppr->pr_mtx); |
207 nlpr = malloc(sizeof(struct linux_prison), M_PRISON, M_WAITOK); |
208 lpr = linux_find_prison(pr, &ppr); 209 if (ppr == pr) { |
210 free(nlpr, M_PRISON); 211 goto done; 212 } |
213 /* Inherit the initial values from the ancestor. */ 214 mtx_lock(&pr->pr_mtx); |
215 error = osd_jail_set(pr, linux_osd_jail_slot, nlpr); |
216 if (error == 0) { 217 bcopy(lpr, nlpr, sizeof(*lpr)); |
218 lpr = nlpr; |
219 } else { 220 free(nlpr, M_PRISON); 221 lpr = NULL; |
222 } |
223 mtx_unlock(&ppr->pr_mtx); 224 done: |
225 if (lprp != NULL) 226 *lprp = lpr; |
227 else 228 mtx_unlock(&pr->pr_mtx); |
229 return (error); 230} 231 232/* 233 * Jail OSD methods for Linux prison data. 234 */ 235static int 236linux_prison_create(void *obj, void *data) 237{ |
238 struct prison *pr = obj; 239 struct vfsoptlist *opts = data; 240 241 if (vfs_flagopt(opts, "nolinux", NULL, 0)) 242 return (0); 243 /* 244 * Inherit a prison's initial values from its parent 245 * (different from NULL which also inherits changes). 246 */ |
247 return linux_alloc_prison(pr, NULL); |
248} 249 250static int 251linux_prison_check(void *obj __unused, void *data) 252{ 253 struct vfsoptlist *opts = data; 254 char *osname, *osrelease; |
255 int error, len, osrel, oss_version; |
256 257 /* Check that the parameters are correct. */ 258 (void)vfs_flagopt(opts, "linux", NULL, 0); 259 (void)vfs_flagopt(opts, "nolinux", NULL, 0); 260 error = vfs_getopt(opts, "linux.osname", (void **)&osname, &len); 261 if (error != ENOENT) { 262 if (error != 0) 263 return (error); --- 9 unchanged lines hidden (view full) --- 273 if (error != 0) 274 return (error); 275 if (len == 0 || osrelease[len - 1] != '\0') 276 return (EINVAL); 277 if (len > LINUX_MAX_UTSNAME) { 278 vfs_opterror(opts, "linux.osrelease too long"); 279 return (ENAMETOOLONG); 280 } |
281 error = linux_map_osrel(osrelease, &osrel); 282 if (error != 0) { 283 vfs_opterror(opts, "linux.osrelease format error"); 284 return (error); 285 } |
286 } 287 error = vfs_copyopt(opts, "linux.oss_version", &oss_version, 288 sizeof(oss_version)); 289 return (error == ENOENT ? 0 : error); 290} 291 292static int 293linux_prison_set(void *obj, void *data) --- 14 unchanged lines hidden (view full) --- 308 yeslinux = 1; 309 error = vfs_getopt(opts, "linux.osrelease", (void **)&osrelease, &len); 310 if (error == ENOENT) 311 osrelease = NULL; 312 else 313 yeslinux = 1; 314 error = vfs_copyopt(opts, "linux.oss_version", &oss_version, 315 sizeof(oss_version)); |
316 gotversion = (error == 0); |
317 yeslinux |= gotversion; 318 if (nolinux) { 319 /* "nolinux": inherit the parent's Linux info. */ 320 mtx_lock(&pr->pr_mtx); 321 osd_jail_del(pr, linux_osd_jail_slot); 322 mtx_unlock(&pr->pr_mtx); 323 } else if (yeslinux) { 324 /* 325 * "linux" or "linux.*": 326 * the prison gets its own Linux info. 327 */ |
328 error = linux_alloc_prison(pr, &lpr); 329 if (error) { 330 mtx_unlock(&pr->pr_mtx); 331 return (error); 332 } 333 if (osrelease) { 334 error = linux_map_osrel(osrelease, &lpr->pr_osrel); 335 if (error) { --- 21 unchanged lines hidden (view full) --- 357 "Jail Linux kernel OS release"); 358SYSCTL_JAIL_PARAM(_linux, oss_version, CTLTYPE_INT | CTLFLAG_RW, 359 "I", "Jail Linux OSS version"); 360 361static int 362linux_prison_get(void *obj, void *data) 363{ 364 struct linux_prison *lpr; |
365 struct prison *ppr; |
366 struct prison *pr = obj; 367 struct vfsoptlist *opts = data; 368 int error, i; 369 |
370 static int version0; 371 372 /* See if this prison is the one with the Linux info. */ 373 lpr = linux_find_prison(pr, &ppr); 374 i = (ppr == pr); |
375 error = vfs_setopt(opts, "linux", &i, sizeof(i)); 376 if (error != 0 && error != ENOENT) 377 goto done; 378 i = !i; 379 error = vfs_setopt(opts, "nolinux", &i, sizeof(i)); 380 if (error != 0 && error != ENOENT) 381 goto done; |
382 if (i) { 383 /* 384 * If this prison is inheriting its Linux info, report 385 * empty/zero parameters. 386 */ 387 error = vfs_setopts(opts, "linux.osname", ""); |
388 if (error != 0 && error != ENOENT) 389 goto done; |
390 error = vfs_setopts(opts, "linux.osrelease", ""); |
391 if (error != 0 && error != ENOENT) 392 goto done; |
393 error = vfs_setopt(opts, "linux.oss_version", &version0, 394 sizeof(lpr->pr_oss_version)); |
395 if (error != 0 && error != ENOENT) 396 goto done; 397 } else { |
398 error = vfs_setopts(opts, "linux.osname", lpr->pr_osname); |
399 if (error != 0 && error != ENOENT) 400 goto done; |
401 error = vfs_setopts(opts, "linux.osrelease", lpr->pr_osrelease); |
402 if (error != 0 && error != ENOENT) 403 goto done; 404 error = vfs_setopt(opts, "linux.oss_version", |
405 &lpr->pr_oss_version, sizeof(lpr->pr_oss_version)); |
406 if (error != 0 && error != ENOENT) 407 goto done; |
408 } 409 error = 0; 410 411 done: |
412 mtx_unlock(&ppr->pr_mtx); |
413 return (error); 414} 415 416static void 417linux_prison_destructor(void *data) 418{ 419 420 free(data, M_PRISON); --- 10 unchanged lines hidden (view full) --- 431 [PR_METHOD_CHECK] = linux_prison_check 432 }; 433 434 linux_osd_jail_slot = 435 osd_jail_register(linux_prison_destructor, methods); 436 if (linux_osd_jail_slot > 0) { 437 /* Copy the system linux info to any current prisons. */ 438 sx_xlock(&allprison_lock); |
439 TAILQ_FOREACH(pr, &allprison, pr_list) |
440 (void)linux_alloc_prison(pr, NULL); |
441 sx_xunlock(&allprison_lock); 442 } 443} 444 445void 446linux_osd_jail_deregister(void) 447{ 448 449 if (linux_osd_jail_slot) 450 osd_jail_deregister(linux_osd_jail_slot); 451} 452 453void 454linux_get_osname(struct thread *td, char *dst) 455{ 456 struct prison *pr; 457 struct linux_prison *lpr; 458 |
459 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); 460 bcopy(lpr->pr_osname, dst, LINUX_MAX_UTSNAME); 461 mtx_unlock(&pr->pr_mtx); |
462} 463 464int 465linux_set_osname(struct thread *td, char *osname) 466{ 467 struct prison *pr; 468 struct linux_prison *lpr; 469 |
470 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); 471 strlcpy(lpr->pr_osname, osname, LINUX_MAX_UTSNAME); 472 mtx_unlock(&pr->pr_mtx); |
473 return (0); 474} 475 476void 477linux_get_osrelease(struct thread *td, char *dst) 478{ 479 struct prison *pr; 480 struct linux_prison *lpr; 481 |
482 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); 483 bcopy(lpr->pr_osrelease, dst, LINUX_MAX_UTSNAME); 484 mtx_unlock(&pr->pr_mtx); |
485} 486 487int 488linux_kernver(struct thread *td) 489{ 490 struct prison *pr; 491 struct linux_prison *lpr; 492 int osrel; 493 |
494 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); 495 osrel = lpr->pr_osrel; 496 mtx_unlock(&pr->pr_mtx); |
497 return (osrel); 498} 499 500int 501linux_set_osrelease(struct thread *td, char *osrelease) 502{ 503 struct prison *pr; 504 struct linux_prison *lpr; 505 int error; 506 |
507 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); 508 error = linux_map_osrel(osrelease, &lpr->pr_osrel); 509 if (error == 0) |
510 strlcpy(lpr->pr_osrelease, osrelease, LINUX_MAX_UTSNAME); |
511 mtx_unlock(&pr->pr_mtx); 512 return (error); |
513} 514 515int 516linux_get_oss_version(struct thread *td) 517{ 518 struct prison *pr; 519 struct linux_prison *lpr; 520 int version; 521 |
522 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); 523 version = lpr->pr_oss_version; 524 mtx_unlock(&pr->pr_mtx); |
525 return (version); 526} 527 528int 529linux_set_oss_version(struct thread *td, int oss_version) 530{ 531 struct prison *pr; 532 struct linux_prison *lpr; 533 |
534 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); 535 lpr->pr_oss_version = oss_version; 536 mtx_unlock(&pr->pr_mtx); |
537 return (0); 538} 539 540#if defined(DEBUG) || defined(KTR) 541 542u_char linux_debug_map[howmany(LINUX_SYS_MAXSYSCALL, sizeof(u_char))]; 543 544static int --- 55 unchanged lines hidden --- |