| 1 | /* $NetBSD: sys_pset.c,v 1.19 2015/07/30 08:11:44 maxv Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2008, Mindaugas Rasiukevicius <rmind at NetBSD org> |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /* |
| 30 | * Implementation of the Processor Sets. |
| 31 | * |
| 32 | * Locking |
| 33 | * The array of the processor-set structures and its members are protected |
| 34 | * by the global cpu_lock. Note that in scheduler, the very l_psid value |
| 35 | * might be used without lock held. |
| 36 | */ |
| 37 | |
| 38 | #include <sys/cdefs.h> |
| 39 | __KERNEL_RCSID(0, "$NetBSD: sys_pset.c,v 1.19 2015/07/30 08:11:44 maxv Exp $" ); |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | |
| 43 | #include <sys/cpu.h> |
| 44 | #include <sys/kauth.h> |
| 45 | #include <sys/kmem.h> |
| 46 | #include <sys/lwp.h> |
| 47 | #include <sys/mutex.h> |
| 48 | #include <sys/proc.h> |
| 49 | #include <sys/pset.h> |
| 50 | #include <sys/sched.h> |
| 51 | #include <sys/syscallargs.h> |
| 52 | #include <sys/sysctl.h> |
| 53 | #include <sys/systm.h> |
| 54 | #include <sys/types.h> |
| 55 | |
| 56 | static pset_info_t ** psets; |
| 57 | static u_int psets_max; |
| 58 | static u_int psets_count; |
| 59 | static kauth_listener_t psets_listener; |
| 60 | |
| 61 | static int psets_realloc(int); |
| 62 | static int psid_validate(psetid_t, bool); |
| 63 | static int kern_pset_create(psetid_t *); |
| 64 | static int kern_pset_destroy(psetid_t); |
| 65 | |
| 66 | static int |
| 67 | psets_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie, |
| 68 | void *arg0, void *arg1, void *arg2, void *arg3) |
| 69 | { |
| 70 | psetid_t id; |
| 71 | enum kauth_system_req req; |
| 72 | int result; |
| 73 | |
| 74 | result = KAUTH_RESULT_DEFER; |
| 75 | req = (enum kauth_system_req)arg0; |
| 76 | id = (psetid_t)(unsigned long)arg1; |
| 77 | |
| 78 | if (action != KAUTH_SYSTEM_PSET) |
| 79 | return result; |
| 80 | |
| 81 | if ((req == KAUTH_REQ_SYSTEM_PSET_ASSIGN) || |
| 82 | (req == KAUTH_REQ_SYSTEM_PSET_BIND)) { |
| 83 | if (id == PS_QUERY) |
| 84 | result = KAUTH_RESULT_ALLOW; |
| 85 | } |
| 86 | |
| 87 | return result; |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | * Initialization of the processor-sets. |
| 92 | */ |
| 93 | void |
| 94 | psets_init(void) |
| 95 | { |
| 96 | |
| 97 | psets_max = max(maxcpus, 32); |
| 98 | psets = kmem_zalloc(psets_max * sizeof(void *), KM_SLEEP); |
| 99 | psets_count = 0; |
| 100 | |
| 101 | psets_listener = kauth_listen_scope(KAUTH_SCOPE_SYSTEM, |
| 102 | psets_listener_cb, NULL); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * Reallocate the array of the processor-set structures. |
| 107 | */ |
| 108 | static int |
| 109 | psets_realloc(int new_psets_max) |
| 110 | { |
| 111 | pset_info_t **new_psets, **old_psets; |
| 112 | const u_int newsize = new_psets_max * sizeof(void *); |
| 113 | u_int i, oldsize; |
| 114 | |
| 115 | if (new_psets_max < 1) |
| 116 | return EINVAL; |
| 117 | |
| 118 | new_psets = kmem_zalloc(newsize, KM_SLEEP); |
| 119 | mutex_enter(&cpu_lock); |
| 120 | old_psets = psets; |
| 121 | oldsize = psets_max * sizeof(void *); |
| 122 | |
| 123 | /* Check if we can lower the size of the array */ |
| 124 | if (new_psets_max < psets_max) { |
| 125 | for (i = new_psets_max; i < psets_max; i++) { |
| 126 | if (psets[i] == NULL) |
| 127 | continue; |
| 128 | mutex_exit(&cpu_lock); |
| 129 | kmem_free(new_psets, newsize); |
| 130 | return EBUSY; |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | /* Copy all pointers to the new array */ |
| 135 | memcpy(new_psets, psets, newsize); |
| 136 | psets_max = new_psets_max; |
| 137 | psets = new_psets; |
| 138 | mutex_exit(&cpu_lock); |
| 139 | |
| 140 | kmem_free(old_psets, oldsize); |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * Validate processor-set ID. |
| 146 | */ |
| 147 | static int |
| 148 | psid_validate(psetid_t psid, bool chkps) |
| 149 | { |
| 150 | |
| 151 | KASSERT(mutex_owned(&cpu_lock)); |
| 152 | |
| 153 | if (chkps && (psid == PS_NONE || psid == PS_QUERY || psid == PS_MYID)) |
| 154 | return 0; |
| 155 | if (psid <= 0 || psid > psets_max) |
| 156 | return EINVAL; |
| 157 | if (psets[psid - 1] == NULL) |
| 158 | return EINVAL; |
| 159 | if (psets[psid - 1]->ps_flags & PSET_BUSY) |
| 160 | return EBUSY; |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | /* |
| 166 | * Create a processor-set. |
| 167 | */ |
| 168 | static int |
| 169 | kern_pset_create(psetid_t *psid) |
| 170 | { |
| 171 | pset_info_t *pi; |
| 172 | u_int i; |
| 173 | |
| 174 | if (psets_count == psets_max) |
| 175 | return ENOMEM; |
| 176 | |
| 177 | pi = kmem_zalloc(sizeof(pset_info_t), KM_SLEEP); |
| 178 | |
| 179 | mutex_enter(&cpu_lock); |
| 180 | if (psets_count == psets_max) { |
| 181 | mutex_exit(&cpu_lock); |
| 182 | kmem_free(pi, sizeof(pset_info_t)); |
| 183 | return ENOMEM; |
| 184 | } |
| 185 | |
| 186 | /* Find a free entry in the array */ |
| 187 | for (i = 0; i < psets_max; i++) |
| 188 | if (psets[i] == NULL) |
| 189 | break; |
| 190 | KASSERT(i != psets_max); |
| 191 | |
| 192 | psets[i] = pi; |
| 193 | psets_count++; |
| 194 | mutex_exit(&cpu_lock); |
| 195 | |
| 196 | *psid = i + 1; |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Destroy a processor-set. |
| 202 | */ |
| 203 | static int |
| 204 | kern_pset_destroy(psetid_t psid) |
| 205 | { |
| 206 | struct cpu_info *ci; |
| 207 | pset_info_t *pi; |
| 208 | struct lwp *l; |
| 209 | CPU_INFO_ITERATOR cii; |
| 210 | int error; |
| 211 | |
| 212 | mutex_enter(&cpu_lock); |
| 213 | if (psid == PS_MYID) { |
| 214 | /* Use caller's processor-set ID */ |
| 215 | psid = curlwp->l_psid; |
| 216 | } |
| 217 | error = psid_validate(psid, false); |
| 218 | if (error) { |
| 219 | mutex_exit(&cpu_lock); |
| 220 | return error; |
| 221 | } |
| 222 | |
| 223 | /* Release the processor-set from all CPUs */ |
| 224 | for (CPU_INFO_FOREACH(cii, ci)) { |
| 225 | struct schedstate_percpu *spc; |
| 226 | |
| 227 | spc = &ci->ci_schedstate; |
| 228 | if (spc->spc_psid != psid) |
| 229 | continue; |
| 230 | spc->spc_psid = PS_NONE; |
| 231 | } |
| 232 | /* Mark that processor-set is going to be destroyed */ |
| 233 | pi = psets[psid - 1]; |
| 234 | pi->ps_flags |= PSET_BUSY; |
| 235 | mutex_exit(&cpu_lock); |
| 236 | |
| 237 | /* Unmark the processor-set ID from each thread */ |
| 238 | mutex_enter(proc_lock); |
| 239 | LIST_FOREACH(l, &alllwp, l_list) { |
| 240 | /* Safe to check and set without lock held */ |
| 241 | if (l->l_psid != psid) |
| 242 | continue; |
| 243 | l->l_psid = PS_NONE; |
| 244 | } |
| 245 | mutex_exit(proc_lock); |
| 246 | |
| 247 | /* Destroy the processor-set */ |
| 248 | mutex_enter(&cpu_lock); |
| 249 | psets[psid - 1] = NULL; |
| 250 | psets_count--; |
| 251 | mutex_exit(&cpu_lock); |
| 252 | |
| 253 | kmem_free(pi, sizeof(pset_info_t)); |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * General system calls for the processor-sets. |
| 259 | */ |
| 260 | |
| 261 | int |
| 262 | sys_pset_create(struct lwp *l, const struct sys_pset_create_args *uap, |
| 263 | register_t *retval) |
| 264 | { |
| 265 | /* { |
| 266 | syscallarg(psetid_t) *psid; |
| 267 | } */ |
| 268 | psetid_t psid; |
| 269 | int error; |
| 270 | |
| 271 | /* Available only for super-user */ |
| 272 | if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_PSET, |
| 273 | KAUTH_REQ_SYSTEM_PSET_CREATE, NULL, NULL, NULL)) |
| 274 | return EPERM; |
| 275 | |
| 276 | error = kern_pset_create(&psid); |
| 277 | if (error) |
| 278 | return error; |
| 279 | |
| 280 | error = copyout(&psid, SCARG(uap, psid), sizeof(psetid_t)); |
| 281 | if (error) |
| 282 | (void)kern_pset_destroy(psid); |
| 283 | |
| 284 | return error; |
| 285 | } |
| 286 | |
| 287 | int |
| 288 | sys_pset_destroy(struct lwp *l, const struct sys_pset_destroy_args *uap, |
| 289 | register_t *retval) |
| 290 | { |
| 291 | /* { |
| 292 | syscallarg(psetid_t) psid; |
| 293 | } */ |
| 294 | |
| 295 | /* Available only for super-user */ |
| 296 | if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_PSET, |
| 297 | KAUTH_REQ_SYSTEM_PSET_DESTROY, |
| 298 | KAUTH_ARG(SCARG(uap, psid)), NULL, NULL)) |
| 299 | return EPERM; |
| 300 | |
| 301 | return kern_pset_destroy(SCARG(uap, psid)); |
| 302 | } |
| 303 | |
| 304 | int |
| 305 | sys_pset_assign(struct lwp *l, const struct sys_pset_assign_args *uap, |
| 306 | register_t *retval) |
| 307 | { |
| 308 | /* { |
| 309 | syscallarg(psetid_t) psid; |
| 310 | syscallarg(cpuid_t) cpuid; |
| 311 | syscallarg(psetid_t) *opsid; |
| 312 | } */ |
| 313 | struct cpu_info *ici, *ci = NULL; |
| 314 | struct schedstate_percpu *spc = NULL; |
| 315 | struct lwp *t; |
| 316 | psetid_t psid = SCARG(uap, psid), opsid = 0; |
| 317 | CPU_INFO_ITERATOR cii; |
| 318 | int error = 0, nnone = 0; |
| 319 | |
| 320 | /* Available only for super-user, except the case of PS_QUERY */ |
| 321 | if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_PSET, |
| 322 | KAUTH_REQ_SYSTEM_PSET_ASSIGN, KAUTH_ARG(SCARG(uap, psid)), NULL, |
| 323 | NULL)) |
| 324 | return EPERM; |
| 325 | |
| 326 | /* Find the target CPU */ |
| 327 | mutex_enter(&cpu_lock); |
| 328 | for (CPU_INFO_FOREACH(cii, ici)) { |
| 329 | struct schedstate_percpu *ispc; |
| 330 | ispc = &ici->ci_schedstate; |
| 331 | if (cpu_index(ici) == SCARG(uap, cpuid)) { |
| 332 | ci = ici; |
| 333 | spc = ispc; |
| 334 | } |
| 335 | nnone += (ispc->spc_psid == PS_NONE); |
| 336 | } |
| 337 | if (ci == NULL) { |
| 338 | mutex_exit(&cpu_lock); |
| 339 | return EINVAL; |
| 340 | } |
| 341 | error = psid_validate(psid, true); |
| 342 | if (error) { |
| 343 | mutex_exit(&cpu_lock); |
| 344 | return error; |
| 345 | } |
| 346 | opsid = spc->spc_psid; |
| 347 | switch (psid) { |
| 348 | case PS_QUERY: |
| 349 | break; |
| 350 | case PS_MYID: |
| 351 | psid = curlwp->l_psid; |
| 352 | /* FALLTHROUGH */ |
| 353 | default: |
| 354 | /* |
| 355 | * Ensure at least one CPU stays in the default set, |
| 356 | * and that specified CPU is not offline. |
| 357 | */ |
| 358 | if (psid != PS_NONE && ((spc->spc_flags & SPCF_OFFLINE) || |
| 359 | (nnone == 1 && spc->spc_psid == PS_NONE))) { |
| 360 | mutex_exit(&cpu_lock); |
| 361 | return EBUSY; |
| 362 | } |
| 363 | mutex_enter(proc_lock); |
| 364 | /* |
| 365 | * Ensure that none of the threads are using affinity mask |
| 366 | * with this target CPU in it. |
| 367 | */ |
| 368 | LIST_FOREACH(t, &alllwp, l_list) { |
| 369 | if (t->l_affinity == NULL) { |
| 370 | continue; |
| 371 | } |
| 372 | lwp_lock(t); |
| 373 | if (t->l_affinity == NULL) { |
| 374 | lwp_unlock(t); |
| 375 | continue; |
| 376 | } |
| 377 | if (kcpuset_isset(t->l_affinity, cpu_index(ci))) { |
| 378 | lwp_unlock(t); |
| 379 | mutex_exit(proc_lock); |
| 380 | mutex_exit(&cpu_lock); |
| 381 | return EPERM; |
| 382 | } |
| 383 | lwp_unlock(t); |
| 384 | } |
| 385 | /* |
| 386 | * Set the processor-set ID. |
| 387 | * Migrate out any threads running on this CPU. |
| 388 | */ |
| 389 | spc->spc_psid = psid; |
| 390 | |
| 391 | LIST_FOREACH(t, &alllwp, l_list) { |
| 392 | struct cpu_info *tci; |
| 393 | if (t->l_cpu != ci) |
| 394 | continue; |
| 395 | if (t->l_pflag & (LP_BOUND | LP_INTR)) |
| 396 | continue; |
| 397 | lwp_lock(t); |
| 398 | tci = sched_takecpu(t); |
| 399 | KASSERT(tci != ci); |
| 400 | lwp_migrate(t, tci); |
| 401 | } |
| 402 | mutex_exit(proc_lock); |
| 403 | break; |
| 404 | } |
| 405 | mutex_exit(&cpu_lock); |
| 406 | |
| 407 | if (SCARG(uap, opsid) != NULL) |
| 408 | error = copyout(&opsid, SCARG(uap, opsid), sizeof(psetid_t)); |
| 409 | |
| 410 | return error; |
| 411 | } |
| 412 | |
| 413 | int |
| 414 | sys__pset_bind(struct lwp *l, const struct sys__pset_bind_args *uap, |
| 415 | register_t *retval) |
| 416 | { |
| 417 | /* { |
| 418 | syscallarg(idtype_t) idtype; |
| 419 | syscallarg(id_t) first_id; |
| 420 | syscallarg(id_t) second_id; |
| 421 | syscallarg(psetid_t) psid; |
| 422 | syscallarg(psetid_t) *opsid; |
| 423 | } */ |
| 424 | struct cpu_info *ci; |
| 425 | struct proc *p; |
| 426 | struct lwp *t; |
| 427 | id_t id1, id2; |
| 428 | pid_t pid = 0; |
| 429 | lwpid_t lid = 0; |
| 430 | psetid_t psid, opsid; |
| 431 | int error = 0, lcnt; |
| 432 | |
| 433 | psid = SCARG(uap, psid); |
| 434 | |
| 435 | /* Available only for super-user, except the case of PS_QUERY */ |
| 436 | if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_PSET, |
| 437 | KAUTH_REQ_SYSTEM_PSET_BIND, KAUTH_ARG(SCARG(uap, psid)), NULL, |
| 438 | NULL)) |
| 439 | return EPERM; |
| 440 | |
| 441 | mutex_enter(&cpu_lock); |
| 442 | error = psid_validate(psid, true); |
| 443 | if (error) { |
| 444 | mutex_exit(&cpu_lock); |
| 445 | return error; |
| 446 | } |
| 447 | if (psid == PS_MYID) |
| 448 | psid = curlwp->l_psid; |
| 449 | if (psid != PS_QUERY && psid != PS_NONE) |
| 450 | psets[psid - 1]->ps_flags |= PSET_BUSY; |
| 451 | mutex_exit(&cpu_lock); |
| 452 | |
| 453 | /* |
| 454 | * Get PID and LID from the ID. |
| 455 | */ |
| 456 | p = l->l_proc; |
| 457 | id1 = SCARG(uap, first_id); |
| 458 | id2 = SCARG(uap, second_id); |
| 459 | |
| 460 | switch (SCARG(uap, idtype)) { |
| 461 | case P_PID: |
| 462 | /* |
| 463 | * Process: |
| 464 | * First ID - PID; |
| 465 | * Second ID - ignored; |
| 466 | */ |
| 467 | pid = (id1 == P_MYID) ? p->p_pid : id1; |
| 468 | lid = 0; |
| 469 | break; |
| 470 | case P_LWPID: |
| 471 | /* |
| 472 | * Thread (LWP): |
| 473 | * First ID - LID; |
| 474 | * Second ID - PID; |
| 475 | */ |
| 476 | if (id1 == P_MYID) { |
| 477 | pid = p->p_pid; |
| 478 | lid = l->l_lid; |
| 479 | break; |
| 480 | } |
| 481 | lid = id1; |
| 482 | pid = (id2 == P_MYID) ? p->p_pid : id2; |
| 483 | break; |
| 484 | default: |
| 485 | error = EINVAL; |
| 486 | goto error; |
| 487 | } |
| 488 | |
| 489 | /* Find the process */ |
| 490 | mutex_enter(proc_lock); |
| 491 | p = proc_find(pid); |
| 492 | if (p == NULL) { |
| 493 | mutex_exit(proc_lock); |
| 494 | error = ESRCH; |
| 495 | goto error; |
| 496 | } |
| 497 | mutex_enter(p->p_lock); |
| 498 | mutex_exit(proc_lock); |
| 499 | |
| 500 | /* Disallow modification of the system processes */ |
| 501 | if (p->p_flag & PK_SYSTEM) { |
| 502 | mutex_exit(p->p_lock); |
| 503 | error = EPERM; |
| 504 | goto error; |
| 505 | } |
| 506 | |
| 507 | /* Find the LWP(s) */ |
| 508 | lcnt = 0; |
| 509 | ci = NULL; |
| 510 | LIST_FOREACH(t, &p->p_lwps, l_sibling) { |
| 511 | if (lid && lid != t->l_lid) |
| 512 | continue; |
| 513 | /* |
| 514 | * Bind the thread to the processor-set, |
| 515 | * take some CPU and migrate. |
| 516 | */ |
| 517 | lwp_lock(t); |
| 518 | opsid = t->l_psid; |
| 519 | t->l_psid = psid; |
| 520 | ci = sched_takecpu(t); |
| 521 | /* Unlocks LWP */ |
| 522 | lwp_migrate(t, ci); |
| 523 | lcnt++; |
| 524 | } |
| 525 | mutex_exit(p->p_lock); |
| 526 | if (lcnt == 0) { |
| 527 | error = ESRCH; |
| 528 | goto error; |
| 529 | } |
| 530 | if (SCARG(uap, opsid)) |
| 531 | error = copyout(&opsid, SCARG(uap, opsid), sizeof(psetid_t)); |
| 532 | error: |
| 533 | if (psid != PS_QUERY && psid != PS_NONE) { |
| 534 | mutex_enter(&cpu_lock); |
| 535 | psets[psid - 1]->ps_flags &= ~PSET_BUSY; |
| 536 | mutex_exit(&cpu_lock); |
| 537 | } |
| 538 | return error; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * Sysctl nodes and initialization. |
| 543 | */ |
| 544 | |
| 545 | static int |
| 546 | sysctl_psets_max(SYSCTLFN_ARGS) |
| 547 | { |
| 548 | struct sysctlnode node; |
| 549 | int error, newsize; |
| 550 | |
| 551 | node = *rnode; |
| 552 | node.sysctl_data = &newsize; |
| 553 | |
| 554 | newsize = psets_max; |
| 555 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| 556 | if (error || newp == NULL) |
| 557 | return error; |
| 558 | |
| 559 | if (newsize <= 0) |
| 560 | return EINVAL; |
| 561 | |
| 562 | sysctl_unlock(); |
| 563 | error = psets_realloc(newsize); |
| 564 | sysctl_relock(); |
| 565 | return error; |
| 566 | } |
| 567 | |
| 568 | static int |
| 569 | sysctl_psets_list(SYSCTLFN_ARGS) |
| 570 | { |
| 571 | const size_t bufsz = 1024; |
| 572 | char *buf, tbuf[16]; |
| 573 | int i, error; |
| 574 | size_t len; |
| 575 | |
| 576 | sysctl_unlock(); |
| 577 | buf = kmem_alloc(bufsz, KM_SLEEP); |
| 578 | snprintf(buf, bufsz, "%d:1" , PS_NONE); /* XXX */ |
| 579 | |
| 580 | mutex_enter(&cpu_lock); |
| 581 | for (i = 0; i < psets_max; i++) { |
| 582 | if (psets[i] == NULL) |
| 583 | continue; |
| 584 | snprintf(tbuf, sizeof(tbuf), ",%d:2" , i + 1); /* XXX */ |
| 585 | strlcat(buf, tbuf, bufsz); |
| 586 | } |
| 587 | mutex_exit(&cpu_lock); |
| 588 | len = strlen(buf) + 1; |
| 589 | error = 0; |
| 590 | if (oldp != NULL) |
| 591 | error = copyout(buf, oldp, min(len, *oldlenp)); |
| 592 | *oldlenp = len; |
| 593 | kmem_free(buf, bufsz); |
| 594 | sysctl_relock(); |
| 595 | return error; |
| 596 | } |
| 597 | |
| 598 | SYSCTL_SETUP(sysctl_pset_setup, "sysctl kern.pset subtree setup" ) |
| 599 | { |
| 600 | const struct sysctlnode *node = NULL; |
| 601 | |
| 602 | sysctl_createv(clog, 0, NULL, &node, |
| 603 | CTLFLAG_PERMANENT, |
| 604 | CTLTYPE_NODE, "pset" , |
| 605 | SYSCTL_DESCR("Processor-set options" ), |
| 606 | NULL, 0, NULL, 0, |
| 607 | CTL_KERN, CTL_CREATE, CTL_EOL); |
| 608 | |
| 609 | if (node == NULL) |
| 610 | return; |
| 611 | |
| 612 | sysctl_createv(clog, 0, &node, NULL, |
| 613 | CTLFLAG_PERMANENT | CTLFLAG_READWRITE, |
| 614 | CTLTYPE_INT, "psets_max" , |
| 615 | SYSCTL_DESCR("Maximal count of the processor-sets" ), |
| 616 | sysctl_psets_max, 0, &psets_max, 0, |
| 617 | CTL_CREATE, CTL_EOL); |
| 618 | sysctl_createv(clog, 0, &node, NULL, |
| 619 | CTLFLAG_PERMANENT, |
| 620 | CTLTYPE_STRING, "list" , |
| 621 | SYSCTL_DESCR("List of active sets" ), |
| 622 | sysctl_psets_list, 0, NULL, 0, |
| 623 | CTL_CREATE, CTL_EOL); |
| 624 | } |
| 625 | |