1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/time.h> 35 #include <sys/cred.h> 36 #include <sys/policy.h> 37 #include <sys/debug.h> 38 #include <sys/dirent.h> 39 #include <sys/errno.h> 40 #include <sys/file.h> 41 #include <sys/inline.h> 42 #include <sys/kmem.h> 43 #include <sys/pathname.h> 44 #include <sys/proc.h> 45 #include <sys/signal.h> 46 #include <sys/stat.h> 47 #include <sys/sysmacros.h> 48 #include <sys/systm.h> 49 #include <sys/zone.h> 50 #include <sys/uio.h> 51 #include <sys/var.h> 52 #include <sys/mode.h> 53 #include <sys/poll.h> 54 #include <sys/user.h> 55 #include <sys/vfs.h> 56 #include <sys/gfs.h> 57 #include <sys/vnode.h> 58 #include <sys/fault.h> 59 #include <sys/syscall.h> 60 #include <sys/procfs.h> 61 #include <sys/atomic.h> 62 #include <sys/cmn_err.h> 63 #include <sys/contract_impl.h> 64 #include <sys/ctfs.h> 65 #include <sys/avl.h> 66 #include <fs/fs_subr.h> 67 #include <vm/rm.h> 68 #include <vm/as.h> 69 #include <vm/seg.h> 70 #include <vm/seg_vn.h> 71 #include <vm/hat.h> 72 #include <fs/proc/prdata.h> 73 #if defined(__sparc) 74 #include <sys/regset.h> 75 #endif 76 #if defined(__x86) 77 #include <sys/sysi86.h> 78 #endif 79 80 /* 81 * Created by prinit. 82 */ 83 vnodeops_t *prvnodeops; 84 85 /* 86 * Directory characteristics (patterned after the s5 file system). 87 */ 88 #define PRROOTINO 2 89 90 #define PRDIRSIZE 14 91 struct prdirect { 92 ushort_t d_ino; 93 char d_name[PRDIRSIZE]; 94 }; 95 96 #define PRSDSIZE (sizeof (struct prdirect)) 97 98 /* 99 * Directory characteristics. 100 */ 101 typedef struct prdirent { 102 ino64_t d_ino; /* "inode number" of entry */ 103 off64_t d_off; /* offset of disk directory entry */ 104 unsigned short d_reclen; /* length of this record */ 105 char d_name[14]; /* name of file */ 106 } prdirent_t; 107 108 /* 109 * Contents of a /proc/<pid> directory. 110 * Reuse d_ino field for the /proc file type. 111 */ 112 static prdirent_t piddir[] = { 113 { PR_PIDDIR, 1 * sizeof (prdirent_t), sizeof (prdirent_t), 114 "." }, 115 { PR_PROCDIR, 2 * sizeof (prdirent_t), sizeof (prdirent_t), 116 ".." }, 117 { PR_AS, 3 * sizeof (prdirent_t), sizeof (prdirent_t), 118 "as" }, 119 { PR_CTL, 4 * sizeof (prdirent_t), sizeof (prdirent_t), 120 "ctl" }, 121 { PR_STATUS, 5 * sizeof (prdirent_t), sizeof (prdirent_t), 122 "status" }, 123 { PR_LSTATUS, 6 * sizeof (prdirent_t), sizeof (prdirent_t), 124 "lstatus" }, 125 { PR_PSINFO, 7 * sizeof (prdirent_t), sizeof (prdirent_t), 126 "psinfo" }, 127 { PR_LPSINFO, 8 * sizeof (prdirent_t), sizeof (prdirent_t), 128 "lpsinfo" }, 129 { PR_MAP, 9 * sizeof (prdirent_t), sizeof (prdirent_t), 130 "map" }, 131 { PR_RMAP, 10 * sizeof (prdirent_t), sizeof (prdirent_t), 132 "rmap" }, 133 { PR_XMAP, 11 * sizeof (prdirent_t), sizeof (prdirent_t), 134 "xmap" }, 135 { PR_CRED, 12 * sizeof (prdirent_t), sizeof (prdirent_t), 136 "cred" }, 137 { PR_SIGACT, 13 * sizeof (prdirent_t), sizeof (prdirent_t), 138 "sigact" }, 139 { PR_AUXV, 14 * sizeof (prdirent_t), sizeof (prdirent_t), 140 "auxv" }, 141 { PR_USAGE, 15 * sizeof (prdirent_t), sizeof (prdirent_t), 142 "usage" }, 143 { PR_LUSAGE, 16 * sizeof (prdirent_t), sizeof (prdirent_t), 144 "lusage" }, 145 { PR_PAGEDATA, 17 * sizeof (prdirent_t), sizeof (prdirent_t), 146 "pagedata" }, 147 { PR_WATCH, 18 * sizeof (prdirent_t), sizeof (prdirent_t), 148 "watch" }, 149 { PR_CURDIR, 19 * sizeof (prdirent_t), sizeof (prdirent_t), 150 "cwd" }, 151 { PR_ROOTDIR, 20 * sizeof (prdirent_t), sizeof (prdirent_t), 152 "root" }, 153 { PR_FDDIR, 21 * sizeof (prdirent_t), sizeof (prdirent_t), 154 "fd" }, 155 { PR_OBJECTDIR, 22 * sizeof (prdirent_t), sizeof (prdirent_t), 156 "object" }, 157 { PR_LWPDIR, 23 * sizeof (prdirent_t), sizeof (prdirent_t), 158 "lwp" }, 159 { PR_PRIV, 24 * sizeof (prdirent_t), sizeof (prdirent_t), 160 "priv" }, 161 { PR_PATHDIR, 25 * sizeof (prdirent_t), sizeof (prdirent_t), 162 "path" }, 163 { PR_CTDIR, 26 * sizeof (prdirent_t), sizeof (prdirent_t), 164 "contracts" }, 165 #if defined(__x86) 166 { PR_LDT, 27 * sizeof (prdirent_t), sizeof (prdirent_t), 167 "ldt" }, 168 #endif 169 }; 170 171 #define NPIDDIRFILES (sizeof (piddir) / sizeof (piddir[0]) - 2) 172 173 /* 174 * Contents of a /proc/<pid>/lwp/<lwpid> directory. 175 */ 176 static prdirent_t lwpiddir[] = { 177 { PR_LWPIDDIR, 1 * sizeof (prdirent_t), sizeof (prdirent_t), 178 "." }, 179 { PR_LWPDIR, 2 * sizeof (prdirent_t), sizeof (prdirent_t), 180 ".." }, 181 { PR_LWPCTL, 3 * sizeof (prdirent_t), sizeof (prdirent_t), 182 "lwpctl" }, 183 { PR_LWPSTATUS, 4 * sizeof (prdirent_t), sizeof (prdirent_t), 184 "lwpstatus" }, 185 { PR_LWPSINFO, 5 * sizeof (prdirent_t), sizeof (prdirent_t), 186 "lwpsinfo" }, 187 { PR_LWPUSAGE, 6 * sizeof (prdirent_t), sizeof (prdirent_t), 188 "lwpusage" }, 189 { PR_XREGS, 7 * sizeof (prdirent_t), sizeof (prdirent_t), 190 "xregs" }, 191 { PR_TMPLDIR, 8 * sizeof (prdirent_t), sizeof (prdirent_t), 192 "templates" }, 193 #if defined(__sparc) 194 { PR_GWINDOWS, 9 * sizeof (prdirent_t), sizeof (prdirent_t), 195 "gwindows" }, 196 { PR_ASRS, 10 * sizeof (prdirent_t), sizeof (prdirent_t), 197 "asrs" }, 198 #endif 199 }; 200 201 #define NLWPIDDIRFILES (sizeof (lwpiddir) / sizeof (lwpiddir[0]) - 2) 202 203 /* 204 * Span of entries in the array files (lstatus, lpsinfo, lusage). 205 * We make the span larger than the size of the structure on purpose, 206 * to make sure that programs cannot use the structure size by mistake. 207 * Align _ILP32 structures at 8 bytes, _LP64 structures at 16 bytes. 208 */ 209 #ifdef _LP64 210 #define LSPAN(type) (round16(sizeof (type)) + 16) 211 #define LSPAN32(type) (round8(sizeof (type)) + 8) 212 #else 213 #define LSPAN(type) (round8(sizeof (type)) + 8) 214 #endif 215 216 static void rebuild_objdir(struct as *); 217 static void prfreecommon(prcommon_t *); 218 static int praccess(vnode_t *, int, int, cred_t *); 219 220 static int 221 propen(vnode_t **vpp, int flag, cred_t *cr) 222 { 223 vnode_t *vp = *vpp; 224 prnode_t *pnp = VTOP(vp); 225 prcommon_t *pcp = pnp->pr_pcommon; 226 prnodetype_t type = pnp->pr_type; 227 vnode_t *rvp; 228 vtype_t vtype; 229 proc_t *p; 230 int error = 0; 231 prnode_t *npnp = NULL; 232 233 /* 234 * Nothing to do for the /proc directory itself. 235 */ 236 if (type == PR_PROCDIR) 237 return (0); 238 239 /* 240 * If we are opening an underlying mapped object, reject opens 241 * for writing regardless of the objects's access modes. 242 * If we are opening a file in the /proc/pid/fd directory, 243 * reject the open for any but a regular file or directory. 244 * Just do it if we are opening the current or root directory. 245 */ 246 switch (type) { 247 case PR_OBJECT: 248 case PR_FD: 249 case PR_CURDIR: 250 case PR_ROOTDIR: 251 rvp = pnp->pr_realvp; 252 vtype = rvp->v_type; 253 if ((type == PR_OBJECT && (flag & FWRITE)) || 254 (type == PR_FD && vtype != VREG && vtype != VDIR)) 255 error = EACCES; 256 else { 257 /* 258 * Need to hold rvp since VOP_OPEN() may release it. 259 */ 260 VN_HOLD(rvp); 261 error = VOP_OPEN(&rvp, flag, cr); 262 if (error) { 263 VN_RELE(rvp); 264 } else { 265 *vpp = rvp; 266 VN_RELE(vp); 267 } 268 } 269 return (error); 270 default: 271 break; 272 } 273 274 /* 275 * If we are opening the pagedata file, allocate a prnode now 276 * to avoid calling kmem_alloc() while holding p->p_lock. 277 */ 278 if (type == PR_PAGEDATA || type == PR_OPAGEDATA) 279 npnp = prgetnode(vp, type); 280 281 /* 282 * If the process exists, lock it now. 283 * Otherwise we have a race condition with prclose(). 284 */ 285 p = pr_p_lock(pnp); 286 mutex_exit(&pr_pidlock); 287 if (p == NULL) { 288 if (npnp != NULL) 289 prfreenode(npnp); 290 return (ENOENT); 291 } 292 ASSERT(p == pcp->prc_proc); 293 ASSERT(p->p_proc_flag & P_PR_LOCK); 294 295 /* 296 * Maintain a count of opens for write. Allow exactly one 297 * O_WRITE|O_EXCL request and fail subsequent ones. 298 * Don't fail opens of old (bletch!) /proc lwp files. 299 * Special case for open by the process itself: 300 * Always allow the open by self and discount this 301 * open for other opens for writing. 302 */ 303 if (flag & FWRITE) { 304 if (p == curproc) { 305 pcp->prc_selfopens++; 306 pnp->pr_flags |= PR_ISSELF; 307 } else if (type == PR_LWPIDFILE) { 308 /* EMPTY */; 309 } else if (flag & FEXCL) { 310 if (pcp->prc_writers > pcp->prc_selfopens) { 311 error = EBUSY; 312 goto out; 313 } 314 /* semantic for old /proc interface */ 315 if (type == PR_PIDDIR) 316 pcp->prc_flags |= PRC_EXCL; 317 } else if (pcp->prc_flags & PRC_EXCL) { 318 ASSERT(pcp->prc_writers > pcp->prc_selfopens); 319 error = secpolicy_proc_excl_open(cr); 320 if (error) 321 goto out; 322 } 323 pcp->prc_writers++; 324 /* 325 * The vnode may have become invalid between the 326 * VOP_LOOKUP() of the /proc vnode and the VOP_OPEN(). 327 * If so, do now what prinvalidate() should have done. 328 */ 329 if ((pnp->pr_flags & PR_INVAL) || 330 (type == PR_PIDDIR && 331 (VTOP(pnp->pr_pidfile)->pr_flags & PR_INVAL))) { 332 if (p != curproc) 333 pcp->prc_selfopens++; 334 ASSERT(pcp->prc_selfopens <= pcp->prc_writers); 335 if (pcp->prc_selfopens == pcp->prc_writers) 336 pcp->prc_flags &= ~PRC_EXCL; 337 } 338 } 339 340 /* 341 * Do file-specific things. 342 */ 343 switch (type) { 344 default: 345 break; 346 case PR_PAGEDATA: 347 case PR_OPAGEDATA: 348 /* 349 * Enable data collection for page data file; 350 * get unique id from the hat layer. 351 */ 352 { 353 int id; 354 355 /* 356 * Drop p->p_lock to call hat_startstat() 357 */ 358 mutex_exit(&p->p_lock); 359 if ((p->p_flag & SSYS) || p->p_as == &kas || 360 (id = hat_startstat(p->p_as)) == -1) { 361 mutex_enter(&p->p_lock); 362 error = ENOMEM; 363 } else if (pnp->pr_hatid == 0) { 364 mutex_enter(&p->p_lock); 365 pnp->pr_hatid = (uint_t)id; 366 } else { 367 mutex_enter(&p->p_lock); 368 /* 369 * Use our newly allocated prnode. 370 */ 371 npnp->pr_hatid = (uint_t)id; 372 /* 373 * prgetnode() initialized most of the prnode. 374 * Duplicate the remainder. 375 */ 376 npnp->pr_ino = pnp->pr_ino; 377 npnp->pr_common = pnp->pr_common; 378 npnp->pr_pcommon = pnp->pr_pcommon; 379 npnp->pr_parent = pnp->pr_parent; 380 VN_HOLD(npnp->pr_parent); 381 npnp->pr_index = pnp->pr_index; 382 383 npnp->pr_next = p->p_plist; 384 p->p_plist = PTOV(npnp); 385 386 VN_RELE(PTOV(pnp)); 387 pnp = npnp; 388 npnp = NULL; 389 *vpp = PTOV(pnp); 390 } 391 } 392 break; 393 } 394 395 out: 396 prunlock(pnp); 397 398 if (npnp != NULL) 399 prfreenode(npnp); 400 return (error); 401 } 402 403 /* ARGSUSED */ 404 static int 405 prclose(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr) 406 { 407 prnode_t *pnp = VTOP(vp); 408 prcommon_t *pcp = pnp->pr_pcommon; 409 prnodetype_t type = pnp->pr_type; 410 proc_t *p; 411 kthread_t *t; 412 user_t *up; 413 414 /* 415 * Nothing to do for the /proc directory itself. 416 */ 417 if (type == PR_PROCDIR) 418 return (0); 419 420 ASSERT(type != PR_OBJECT && type != PR_FD && 421 type != PR_CURDIR && type != PR_ROOTDIR); 422 423 /* 424 * If the process exists, lock it now. 425 * Otherwise we have a race condition with propen(). 426 * Hold pr_pidlock across the reference to prc_selfopens, 427 * and prc_writers in case there is no process anymore, 428 * to cover the case of concurrent calls to prclose() 429 * after the process has been reaped by freeproc(). 430 */ 431 p = pr_p_lock(pnp); 432 433 /* 434 * There is nothing more to do until the last close of 435 * the file table entry except to clear the pr_owner 436 * field of the prnode and notify any waiters 437 * (their file descriptor may have just been closed). 438 */ 439 if (count > 1) { 440 mutex_exit(&pr_pidlock); 441 if (pnp->pr_owner == curproc && !fisopen(vp)) 442 pnp->pr_owner = NULL; 443 if (p != NULL) { 444 prnotify(vp); 445 prunlock(pnp); 446 } 447 return (0); 448 } 449 450 /* 451 * Decrement the count of self-opens for writing. 452 * Decrement the total count of opens for writing. 453 * Cancel exclusive opens when only self-opens remain. 454 */ 455 if (flag & FWRITE) { 456 /* 457 * prc_selfopens also contains the count of 458 * invalid writers. See prinvalidate(). 459 */ 460 if ((pnp->pr_flags & (PR_ISSELF|PR_INVAL)) || 461 (type == PR_PIDDIR && 462 (VTOP(pnp->pr_pidfile)->pr_flags & PR_INVAL))) { 463 ASSERT(pcp->prc_selfopens != 0); 464 --pcp->prc_selfopens; 465 } 466 ASSERT(pcp->prc_writers != 0); 467 if (--pcp->prc_writers == pcp->prc_selfopens) 468 pcp->prc_flags &= ~PRC_EXCL; 469 } 470 ASSERT(pcp->prc_writers >= pcp->prc_selfopens); 471 mutex_exit(&pr_pidlock); 472 if (pnp->pr_owner == curproc && !fisopen(vp)) 473 pnp->pr_owner = NULL; 474 475 /* 476 * If there is no process, there is nothing more to do. 477 */ 478 if (p == NULL) 479 return (0); 480 481 ASSERT(p == pcp->prc_proc); 482 prnotify(vp); /* notify waiters */ 483 484 /* 485 * Do file-specific things. 486 */ 487 switch (type) { 488 default: 489 break; 490 case PR_PAGEDATA: 491 case PR_OPAGEDATA: 492 /* 493 * This is a page data file. 494 * Free the hat level statistics. 495 * Drop p->p_lock before calling hat_freestat(). 496 */ 497 mutex_exit(&p->p_lock); 498 if (p->p_as != &kas && pnp->pr_hatid != 0) 499 hat_freestat(p->p_as, pnp->pr_hatid); 500 mutex_enter(&p->p_lock); 501 pnp->pr_hatid = 0; 502 break; 503 } 504 505 /* 506 * On last close of all writable file descriptors, 507 * perform run-on-last-close and/or kill-on-last-close logic. 508 * Can't do this is the /proc agent lwp still exists. 509 */ 510 if (pcp->prc_writers == 0 && 511 p->p_agenttp == NULL && 512 !(pcp->prc_flags & PRC_DESTROY) && 513 p->p_stat != SZOMB && 514 (p->p_proc_flag & (P_PR_RUNLCL|P_PR_KILLCL))) { 515 int killproc; 516 517 /* 518 * Cancel any watchpoints currently in effect. 519 * The process might disappear during this operation. 520 */ 521 if (pr_cancel_watch(pnp) == NULL) 522 return (0); 523 /* 524 * If any tracing flags are set, clear them. 525 */ 526 if (p->p_proc_flag & P_PR_TRACE) { 527 up = PTOU(p); 528 premptyset(&up->u_entrymask); 529 premptyset(&up->u_exitmask); 530 up->u_systrap = 0; 531 } 532 premptyset(&p->p_sigmask); 533 premptyset(&p->p_fltmask); 534 killproc = (p->p_proc_flag & P_PR_KILLCL); 535 p->p_proc_flag &= ~(P_PR_RUNLCL|P_PR_KILLCL|P_PR_TRACE); 536 /* 537 * Cancel any outstanding single-step requests. 538 */ 539 if ((t = p->p_tlist) != NULL) { 540 /* 541 * Drop p_lock because prnostep() touches the stack. 542 * The loop is safe because the process is P_PR_LOCK'd. 543 */ 544 mutex_exit(&p->p_lock); 545 do { 546 prnostep(ttolwp(t)); 547 } while ((t = t->t_forw) != p->p_tlist); 548 mutex_enter(&p->p_lock); 549 } 550 /* 551 * Set runnable all lwps stopped by /proc. 552 */ 553 if (killproc) 554 sigtoproc(p, NULL, SIGKILL); 555 else 556 allsetrun(p); 557 } 558 559 prunlock(pnp); 560 return (0); 561 } 562 563 /* 564 * Array of read functions, indexed by /proc file type. 565 */ 566 static int pr_read_inval(), pr_read_as(), pr_read_status(), 567 pr_read_lstatus(), pr_read_psinfo(), pr_read_lpsinfo(), 568 pr_read_map(), pr_read_rmap(), pr_read_xmap(), 569 pr_read_cred(), pr_read_sigact(), pr_read_auxv(), 570 #if defined(__x86) 571 pr_read_ldt(), 572 #endif 573 pr_read_usage(), pr_read_lusage(), pr_read_pagedata(), 574 pr_read_watch(), pr_read_lwpstatus(), pr_read_lwpsinfo(), 575 pr_read_lwpusage(), pr_read_xregs(), pr_read_priv(), 576 #if defined(__sparc) 577 pr_read_gwindows(), pr_read_asrs(), 578 #endif 579 pr_read_piddir(), pr_read_pidfile(), pr_read_opagedata(); 580 581 static int (*pr_read_function[PR_NFILES])() = { 582 pr_read_inval, /* /proc */ 583 pr_read_inval, /* /proc/self */ 584 pr_read_piddir, /* /proc/<pid> (old /proc read()) */ 585 pr_read_as, /* /proc/<pid>/as */ 586 pr_read_inval, /* /proc/<pid>/ctl */ 587 pr_read_status, /* /proc/<pid>/status */ 588 pr_read_lstatus, /* /proc/<pid>/lstatus */ 589 pr_read_psinfo, /* /proc/<pid>/psinfo */ 590 pr_read_lpsinfo, /* /proc/<pid>/lpsinfo */ 591 pr_read_map, /* /proc/<pid>/map */ 592 pr_read_rmap, /* /proc/<pid>/rmap */ 593 pr_read_xmap, /* /proc/<pid>/xmap */ 594 pr_read_cred, /* /proc/<pid>/cred */ 595 pr_read_sigact, /* /proc/<pid>/sigact */ 596 pr_read_auxv, /* /proc/<pid>/auxv */ 597 #if defined(__x86) 598 pr_read_ldt, /* /proc/<pid>/ldt */ 599 #endif 600 pr_read_usage, /* /proc/<pid>/usage */ 601 pr_read_lusage, /* /proc/<pid>/lusage */ 602 pr_read_pagedata, /* /proc/<pid>/pagedata */ 603 pr_read_watch, /* /proc/<pid>/watch */ 604 pr_read_inval, /* /proc/<pid>/cwd */ 605 pr_read_inval, /* /proc/<pid>/root */ 606 pr_read_inval, /* /proc/<pid>/fd */ 607 pr_read_inval, /* /proc/<pid>/fd/nn */ 608 pr_read_inval, /* /proc/<pid>/object */ 609 pr_read_inval, /* /proc/<pid>/object/xxx */ 610 pr_read_inval, /* /proc/<pid>/lwp */ 611 pr_read_inval, /* /proc/<pid>/lwp/<lwpid> */ 612 pr_read_inval, /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 613 pr_read_lwpstatus, /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 614 pr_read_lwpsinfo, /* /proc/<pid>/lwp/<lwpid>/lwpsinfo */ 615 pr_read_lwpusage, /* /proc/<pid>/lwp/<lwpid>/lwpusage */ 616 pr_read_xregs, /* /proc/<pid>/lwp/<lwpid>/xregs */ 617 pr_read_inval, /* /proc/<pid>/lwp/<lwpid>/templates */ 618 pr_read_inval, /* /proc/<pid>/lwp/<lwpid>/templates/<id> */ 619 #if defined(__sparc) 620 pr_read_gwindows, /* /proc/<pid>/lwp/<lwpid>/gwindows */ 621 pr_read_asrs, /* /proc/<pid>/lwp/<lwpid>/asrs */ 622 #endif 623 pr_read_priv, /* /proc/<pid>/priv */ 624 pr_read_inval, /* /proc/<pid>/path */ 625 pr_read_inval, /* /proc/<pid>/path/xxx */ 626 pr_read_inval, /* /proc/<pid>/contracts */ 627 pr_read_inval, /* /proc/<pid>/contracts/<ctid> */ 628 pr_read_pidfile, /* old process file */ 629 pr_read_pidfile, /* old lwp file */ 630 pr_read_opagedata, /* old pagedata file */ 631 }; 632 633 /* ARGSUSED */ 634 static int 635 pr_read_inval(prnode_t *pnp, uio_t *uiop) 636 { 637 /* 638 * No read() on any /proc directory, use getdents(2) instead. 639 * Cannot read a control file either. 640 * An underlying mapped object file cannot get here. 641 */ 642 return (EINVAL); 643 } 644 645 static int 646 pr_uioread(void *base, long count, uio_t *uiop) 647 { 648 int error = 0; 649 650 ASSERT(count >= 0); 651 count -= uiop->uio_offset; 652 if (count > 0 && uiop->uio_offset >= 0) { 653 error = uiomove((char *)base + uiop->uio_offset, 654 count, UIO_READ, uiop); 655 } 656 657 return (error); 658 } 659 660 static int 661 pr_read_as(prnode_t *pnp, uio_t *uiop) 662 { 663 int error; 664 665 ASSERT(pnp->pr_type == PR_AS); 666 667 if ((error = prlock(pnp, ZNO)) == 0) { 668 proc_t *p = pnp->pr_common->prc_proc; 669 struct as *as = p->p_as; 670 671 /* 672 * /proc I/O cannot be done to a system process. 673 * A 32-bit process cannot read a 64-bit process. 674 */ 675 if ((p->p_flag & SSYS) || as == &kas) { 676 error = 0; 677 #ifdef _SYSCALL32_IMPL 678 } else if (curproc->p_model == DATAMODEL_ILP32 && 679 PROCESS_NOT_32BIT(p)) { 680 error = EOVERFLOW; 681 #endif 682 } else { 683 /* 684 * We don't hold p_lock over an i/o operation because 685 * that could lead to deadlock with the clock thread. 686 */ 687 mutex_exit(&p->p_lock); 688 error = prusrio(p, UIO_READ, uiop, 0); 689 mutex_enter(&p->p_lock); 690 } 691 prunlock(pnp); 692 } 693 694 return (error); 695 } 696 697 static int 698 pr_read_status(prnode_t *pnp, uio_t *uiop) 699 { 700 pstatus_t *sp; 701 int error; 702 703 ASSERT(pnp->pr_type == PR_STATUS); 704 705 /* 706 * We kmem_alloc() the pstatus structure because 707 * it is so big it might blow the kernel stack. 708 */ 709 sp = kmem_alloc(sizeof (*sp), KM_SLEEP); 710 if ((error = prlock(pnp, ZNO)) == 0) { 711 prgetstatus(pnp->pr_common->prc_proc, sp, VTOZONE(PTOV(pnp))); 712 prunlock(pnp); 713 error = pr_uioread(sp, sizeof (*sp), uiop); 714 } 715 kmem_free(sp, sizeof (*sp)); 716 return (error); 717 } 718 719 static int 720 pr_read_lstatus(prnode_t *pnp, uio_t *uiop) 721 { 722 proc_t *p; 723 kthread_t *t; 724 lwpdir_t *ldp; 725 size_t size; 726 prheader_t *php; 727 lwpstatus_t *sp; 728 int error; 729 int nlwp; 730 int i; 731 732 ASSERT(pnp->pr_type == PR_LSTATUS); 733 734 if ((error = prlock(pnp, ZNO)) != 0) 735 return (error); 736 p = pnp->pr_common->prc_proc; 737 nlwp = p->p_lwpcnt; 738 size = sizeof (prheader_t) + nlwp * LSPAN(lwpstatus_t); 739 740 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 741 mutex_exit(&p->p_lock); 742 php = kmem_zalloc(size, KM_SLEEP); 743 mutex_enter(&p->p_lock); 744 /* p->p_lwpcnt can't change while process is locked */ 745 ASSERT(nlwp == p->p_lwpcnt); 746 747 php->pr_nent = nlwp; 748 php->pr_entsize = LSPAN(lwpstatus_t); 749 750 sp = (lwpstatus_t *)(php + 1); 751 for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { 752 if (ldp->ld_entry == NULL || 753 (t = ldp->ld_entry->le_thread) == NULL) 754 continue; 755 prgetlwpstatus(t, sp, VTOZONE(PTOV(pnp))); 756 sp = (lwpstatus_t *)((caddr_t)sp + LSPAN(lwpstatus_t)); 757 } 758 prunlock(pnp); 759 760 error = pr_uioread(php, size, uiop); 761 kmem_free(php, size); 762 return (error); 763 } 764 765 static int 766 pr_read_psinfo(prnode_t *pnp, uio_t *uiop) 767 { 768 psinfo_t psinfo; 769 proc_t *p; 770 int error = 0; 771 772 ASSERT(pnp->pr_type == PR_PSINFO); 773 774 /* 775 * We don't want the full treatment of prlock(pnp) here. 776 * This file is world-readable and never goes invalid. 777 * It doesn't matter if we are in the middle of an exec(). 778 */ 779 p = pr_p_lock(pnp); 780 mutex_exit(&pr_pidlock); 781 if (p == NULL) 782 error = ENOENT; 783 else { 784 ASSERT(p == pnp->pr_common->prc_proc); 785 prgetpsinfo(p, &psinfo); 786 prunlock(pnp); 787 error = pr_uioread(&psinfo, sizeof (psinfo), uiop); 788 } 789 return (error); 790 } 791 792 static int 793 pr_read_lpsinfo(prnode_t *pnp, uio_t *uiop) 794 { 795 proc_t *p; 796 kthread_t *t; 797 lwpdir_t *ldp; 798 lwpent_t *lep; 799 size_t size; 800 prheader_t *php; 801 lwpsinfo_t *sp; 802 int error; 803 int nlwp; 804 int i; 805 806 ASSERT(pnp->pr_type == PR_LPSINFO); 807 808 /* 809 * We don't want the full treatment of prlock(pnp) here. 810 * This file is world-readable and never goes invalid. 811 * It doesn't matter if we are in the middle of an exec(). 812 */ 813 p = pr_p_lock(pnp); 814 mutex_exit(&pr_pidlock); 815 if (p == NULL) 816 return (ENOENT); 817 ASSERT(p == pnp->pr_common->prc_proc); 818 if ((nlwp = p->p_lwpcnt + p->p_zombcnt) == 0) { 819 prunlock(pnp); 820 return (ENOENT); 821 } 822 size = sizeof (prheader_t) + nlwp * LSPAN(lwpsinfo_t); 823 824 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 825 mutex_exit(&p->p_lock); 826 php = kmem_zalloc(size, KM_SLEEP); 827 mutex_enter(&p->p_lock); 828 /* p->p_lwpcnt can't change while process is locked */ 829 ASSERT(nlwp == p->p_lwpcnt + p->p_zombcnt); 830 831 php->pr_nent = nlwp; 832 php->pr_entsize = LSPAN(lwpsinfo_t); 833 834 sp = (lwpsinfo_t *)(php + 1); 835 for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { 836 if ((lep = ldp->ld_entry) == NULL) 837 continue; 838 if ((t = lep->le_thread) != NULL) 839 prgetlwpsinfo(t, sp); 840 else { 841 bzero(sp, sizeof (*sp)); 842 sp->pr_lwpid = lep->le_lwpid; 843 sp->pr_state = SZOMB; 844 sp->pr_sname = 'Z'; 845 sp->pr_start.tv_sec = lep->le_start; 846 sp->pr_bindpro = PBIND_NONE; 847 sp->pr_bindpset = PS_NONE; 848 } 849 sp = (lwpsinfo_t *)((caddr_t)sp + LSPAN(lwpsinfo_t)); 850 } 851 prunlock(pnp); 852 853 error = pr_uioread(php, size, uiop); 854 kmem_free(php, size); 855 return (error); 856 } 857 858 static int 859 pr_read_map_common(prnode_t *pnp, uio_t *uiop, prnodetype_t type) 860 { 861 proc_t *p; 862 struct as *as; 863 list_t iolhead; 864 int error; 865 866 if ((error = prlock(pnp, ZNO)) != 0) 867 return (error); 868 869 p = pnp->pr_common->prc_proc; 870 as = p->p_as; 871 872 if ((p->p_flag & SSYS) || as == &kas) { 873 prunlock(pnp); 874 return (0); 875 } 876 877 mutex_exit(&p->p_lock); 878 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 879 switch (type) { 880 case PR_XMAP: 881 error = prgetxmap(p, &iolhead); 882 break; 883 case PR_RMAP: 884 error = prgetmap(p, 1, &iolhead); 885 break; 886 case PR_MAP: 887 error = prgetmap(p, 0, &iolhead); 888 break; 889 } 890 AS_LOCK_EXIT(as, &as->a_lock); 891 mutex_enter(&p->p_lock); 892 prunlock(pnp); 893 894 error = pr_iol_uiomove_and_free(&iolhead, uiop, error); 895 896 return (error); 897 } 898 899 static int 900 pr_read_map(prnode_t *pnp, uio_t *uiop) 901 { 902 ASSERT(pnp->pr_type == PR_MAP); 903 return (pr_read_map_common(pnp, uiop, pnp->pr_type)); 904 } 905 906 static int 907 pr_read_rmap(prnode_t *pnp, uio_t *uiop) 908 { 909 ASSERT(pnp->pr_type == PR_RMAP); 910 return (pr_read_map_common(pnp, uiop, pnp->pr_type)); 911 } 912 913 static int 914 pr_read_xmap(prnode_t *pnp, uio_t *uiop) 915 { 916 ASSERT(pnp->pr_type == PR_XMAP); 917 return (pr_read_map_common(pnp, uiop, pnp->pr_type)); 918 } 919 920 static int 921 pr_read_cred(prnode_t *pnp, uio_t *uiop) 922 { 923 proc_t *p; 924 prcred_t *pcrp; 925 int error; 926 size_t count; 927 928 ASSERT(pnp->pr_type == PR_CRED); 929 930 /* 931 * We kmem_alloc() the prcred_t structure because 932 * the number of supplementary groups is variable. 933 */ 934 pcrp = 935 kmem_alloc(sizeof (prcred_t) + sizeof (gid_t) * (ngroups_max - 1), 936 KM_SLEEP); 937 938 if ((error = prlock(pnp, ZNO)) != 0) 939 goto out; 940 p = pnp->pr_common->prc_proc; 941 ASSERT(p != NULL); 942 943 prgetcred(p, pcrp); 944 prunlock(pnp); 945 946 count = sizeof (prcred_t); 947 if (pcrp->pr_ngroups > 1) 948 count += sizeof (gid_t) * (pcrp->pr_ngroups - 1); 949 error = pr_uioread(pcrp, count, uiop); 950 out: 951 kmem_free(pcrp, sizeof (prcred_t) + sizeof (gid_t) * (ngroups_max - 1)); 952 return (error); 953 } 954 955 static int 956 pr_read_priv(prnode_t *pnp, uio_t *uiop) 957 { 958 proc_t *p; 959 size_t psize = prgetprivsize(); 960 prpriv_t *ppriv = kmem_alloc(psize, KM_SLEEP); 961 int error; 962 963 ASSERT(pnp->pr_type == PR_PRIV); 964 965 if ((error = prlock(pnp, ZNO)) != 0) 966 goto out; 967 p = pnp->pr_common->prc_proc; 968 ASSERT(p != NULL); 969 970 prgetpriv(p, ppriv); 971 prunlock(pnp); 972 973 error = pr_uioread(ppriv, psize, uiop); 974 out: 975 kmem_free(ppriv, psize); 976 return (error); 977 } 978 979 static int 980 pr_read_sigact(prnode_t *pnp, uio_t *uiop) 981 { 982 proc_t *p; 983 struct sigaction *sap; 984 int sig; 985 int error; 986 user_t *up; 987 988 ASSERT(pnp->pr_type == PR_SIGACT); 989 990 /* 991 * We kmem_alloc() the sigaction array because 992 * it is so big it might blow the kernel stack. 993 */ 994 sap = kmem_alloc((NSIG-1) * sizeof (struct sigaction), KM_SLEEP); 995 996 if ((error = prlock(pnp, ZNO)) != 0) 997 goto out; 998 p = pnp->pr_common->prc_proc; 999 ASSERT(p != NULL); 1000 1001 if (uiop->uio_offset >= (NSIG-1)*sizeof (struct sigaction)) { 1002 prunlock(pnp); 1003 goto out; 1004 } 1005 1006 up = PTOU(p); 1007 for (sig = 1; sig < NSIG; sig++) 1008 prgetaction(p, up, sig, &sap[sig-1]); 1009 prunlock(pnp); 1010 1011 error = pr_uioread(sap, (NSIG - 1) * sizeof (struct sigaction), uiop); 1012 out: 1013 kmem_free(sap, (NSIG-1) * sizeof (struct sigaction)); 1014 return (error); 1015 } 1016 1017 static int 1018 pr_read_auxv(prnode_t *pnp, uio_t *uiop) 1019 { 1020 auxv_t auxv[__KERN_NAUXV_IMPL]; 1021 proc_t *p; 1022 user_t *up; 1023 int error; 1024 1025 ASSERT(pnp->pr_type == PR_AUXV); 1026 1027 if ((error = prlock(pnp, ZNO)) != 0) 1028 return (error); 1029 1030 if (uiop->uio_offset >= sizeof (auxv)) { 1031 prunlock(pnp); 1032 return (0); 1033 } 1034 1035 p = pnp->pr_common->prc_proc; 1036 up = PTOU(p); 1037 bcopy(up->u_auxv, auxv, sizeof (auxv)); 1038 prunlock(pnp); 1039 1040 return (pr_uioread(auxv, sizeof (auxv), uiop)); 1041 } 1042 1043 #if defined(__x86) 1044 /* 1045 * XX64 1046 * This is almost certainly broken for the amd64 kernel, because 1047 * we have two kinds of LDT structures to export -- one for compatibility 1048 * mode, and one for long mode, sigh. 1049 * 1050 * For now lets just have a ldt of size 0 for 64-bit processes. 1051 */ 1052 static int 1053 pr_read_ldt(prnode_t *pnp, uio_t *uiop) 1054 { 1055 proc_t *p; 1056 struct ssd *ssd; 1057 size_t size; 1058 int error; 1059 1060 ASSERT(pnp->pr_type == PR_LDT); 1061 1062 if ((error = prlock(pnp, ZNO)) != 0) 1063 return (error); 1064 p = pnp->pr_common->prc_proc; 1065 1066 mutex_exit(&p->p_lock); 1067 mutex_enter(&p->p_ldtlock); 1068 size = prnldt(p) * sizeof (struct ssd); 1069 if (uiop->uio_offset >= size) { 1070 mutex_exit(&p->p_ldtlock); 1071 mutex_enter(&p->p_lock); 1072 prunlock(pnp); 1073 return (0); 1074 } 1075 1076 ssd = kmem_alloc(size, KM_SLEEP); 1077 prgetldt(p, ssd); 1078 mutex_exit(&p->p_ldtlock); 1079 mutex_enter(&p->p_lock); 1080 prunlock(pnp); 1081 1082 error = pr_uioread(ssd, size, uiop); 1083 kmem_free(ssd, size); 1084 return (error); 1085 } 1086 #endif /* __x86 */ 1087 1088 static int 1089 pr_read_usage(prnode_t *pnp, uio_t *uiop) 1090 { 1091 prhusage_t *pup; 1092 prusage_t *upup; 1093 proc_t *p; 1094 kthread_t *t; 1095 int error; 1096 1097 ASSERT(pnp->pr_type == PR_USAGE); 1098 1099 /* allocate now, before locking the process */ 1100 pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); 1101 upup = kmem_alloc(sizeof (*upup), KM_SLEEP); 1102 1103 /* 1104 * We don't want the full treatment of prlock(pnp) here. 1105 * This file is world-readable and never goes invalid. 1106 * It doesn't matter if we are in the middle of an exec(). 1107 */ 1108 p = pr_p_lock(pnp); 1109 mutex_exit(&pr_pidlock); 1110 if (p == NULL) { 1111 error = ENOENT; 1112 goto out; 1113 } 1114 ASSERT(p == pnp->pr_common->prc_proc); 1115 1116 if (uiop->uio_offset >= sizeof (prusage_t)) { 1117 prunlock(pnp); 1118 error = 0; 1119 goto out; 1120 } 1121 1122 pup->pr_tstamp = gethrtime(); 1123 1124 pup->pr_count = p->p_defunct; 1125 pup->pr_create = p->p_mstart; 1126 pup->pr_term = p->p_mterm; 1127 1128 pup->pr_rtime = p->p_mlreal; 1129 pup->pr_utime = p->p_acct[LMS_USER]; 1130 pup->pr_stime = p->p_acct[LMS_SYSTEM]; 1131 pup->pr_ttime = p->p_acct[LMS_TRAP]; 1132 pup->pr_tftime = p->p_acct[LMS_TFAULT]; 1133 pup->pr_dftime = p->p_acct[LMS_DFAULT]; 1134 pup->pr_kftime = p->p_acct[LMS_KFAULT]; 1135 pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; 1136 pup->pr_slptime = p->p_acct[LMS_SLEEP]; 1137 pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; 1138 pup->pr_stoptime = p->p_acct[LMS_STOPPED]; 1139 1140 pup->pr_minf = p->p_ru.minflt; 1141 pup->pr_majf = p->p_ru.majflt; 1142 pup->pr_nswap = p->p_ru.nswap; 1143 pup->pr_inblk = p->p_ru.inblock; 1144 pup->pr_oublk = p->p_ru.oublock; 1145 pup->pr_msnd = p->p_ru.msgsnd; 1146 pup->pr_mrcv = p->p_ru.msgrcv; 1147 pup->pr_sigs = p->p_ru.nsignals; 1148 pup->pr_vctx = p->p_ru.nvcsw; 1149 pup->pr_ictx = p->p_ru.nivcsw; 1150 pup->pr_sysc = p->p_ru.sysc; 1151 pup->pr_ioch = p->p_ru.ioch; 1152 1153 /* 1154 * Add the usage information for each active lwp. 1155 */ 1156 if ((t = p->p_tlist) != NULL && 1157 !(pnp->pr_pcommon->prc_flags & PRC_DESTROY)) { 1158 do { 1159 if (t->t_proc_flag & TP_LWPEXIT) 1160 continue; 1161 pup->pr_count++; 1162 praddusage(t, pup); 1163 } while ((t = t->t_forw) != p->p_tlist); 1164 } 1165 1166 prunlock(pnp); 1167 1168 prcvtusage(pup, upup); 1169 1170 error = pr_uioread(upup, sizeof (prusage_t), uiop); 1171 out: 1172 kmem_free(pup, sizeof (*pup)); 1173 kmem_free(upup, sizeof (*upup)); 1174 return (error); 1175 } 1176 1177 static int 1178 pr_read_lusage(prnode_t *pnp, uio_t *uiop) 1179 { 1180 int nlwp; 1181 prhusage_t *pup; 1182 prheader_t *php; 1183 prusage_t *upup; 1184 size_t size; 1185 hrtime_t curtime; 1186 proc_t *p; 1187 kthread_t *t; 1188 lwpdir_t *ldp; 1189 int error; 1190 int i; 1191 1192 ASSERT(pnp->pr_type == PR_LUSAGE); 1193 1194 /* 1195 * We don't want the full treatment of prlock(pnp) here. 1196 * This file is world-readable and never goes invalid. 1197 * It doesn't matter if we are in the middle of an exec(). 1198 */ 1199 p = pr_p_lock(pnp); 1200 mutex_exit(&pr_pidlock); 1201 if (p == NULL) 1202 return (ENOENT); 1203 ASSERT(p == pnp->pr_common->prc_proc); 1204 if ((nlwp = p->p_lwpcnt) == 0) { 1205 prunlock(pnp); 1206 return (ENOENT); 1207 } 1208 1209 size = sizeof (prheader_t) + (nlwp + 1) * LSPAN(prusage_t); 1210 if (uiop->uio_offset >= size) { 1211 prunlock(pnp); 1212 return (0); 1213 } 1214 1215 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 1216 mutex_exit(&p->p_lock); 1217 pup = kmem_zalloc(size + sizeof (prhusage_t), KM_SLEEP); 1218 mutex_enter(&p->p_lock); 1219 /* p->p_lwpcnt can't change while process is locked */ 1220 ASSERT(nlwp == p->p_lwpcnt); 1221 1222 php = (prheader_t *)(pup + 1); 1223 upup = (prusage_t *)(php + 1); 1224 1225 php->pr_nent = nlwp + 1; 1226 php->pr_entsize = LSPAN(prusage_t); 1227 1228 curtime = gethrtime(); 1229 1230 /* 1231 * First the summation over defunct lwps. 1232 */ 1233 pup->pr_count = p->p_defunct; 1234 pup->pr_tstamp = curtime; 1235 pup->pr_create = p->p_mstart; 1236 pup->pr_term = p->p_mterm; 1237 1238 pup->pr_rtime = p->p_mlreal; 1239 pup->pr_utime = p->p_acct[LMS_USER]; 1240 pup->pr_stime = p->p_acct[LMS_SYSTEM]; 1241 pup->pr_ttime = p->p_acct[LMS_TRAP]; 1242 pup->pr_tftime = p->p_acct[LMS_TFAULT]; 1243 pup->pr_dftime = p->p_acct[LMS_DFAULT]; 1244 pup->pr_kftime = p->p_acct[LMS_KFAULT]; 1245 pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; 1246 pup->pr_slptime = p->p_acct[LMS_SLEEP]; 1247 pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; 1248 pup->pr_stoptime = p->p_acct[LMS_STOPPED]; 1249 1250 pup->pr_minf = p->p_ru.minflt; 1251 pup->pr_majf = p->p_ru.majflt; 1252 pup->pr_nswap = p->p_ru.nswap; 1253 pup->pr_inblk = p->p_ru.inblock; 1254 pup->pr_oublk = p->p_ru.oublock; 1255 pup->pr_msnd = p->p_ru.msgsnd; 1256 pup->pr_mrcv = p->p_ru.msgrcv; 1257 pup->pr_sigs = p->p_ru.nsignals; 1258 pup->pr_vctx = p->p_ru.nvcsw; 1259 pup->pr_ictx = p->p_ru.nivcsw; 1260 pup->pr_sysc = p->p_ru.sysc; 1261 pup->pr_ioch = p->p_ru.ioch; 1262 1263 prcvtusage(pup, upup); 1264 1265 /* 1266 * Fill one prusage struct for each active lwp. 1267 */ 1268 for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { 1269 if (ldp->ld_entry == NULL || 1270 (t = ldp->ld_entry->le_thread) == NULL) 1271 continue; 1272 ASSERT(!(t->t_proc_flag & TP_LWPEXIT)); 1273 ASSERT(nlwp > 0); 1274 --nlwp; 1275 upup = (prusage_t *)((caddr_t)upup + LSPAN(prusage_t)); 1276 prgetusage(t, pup); 1277 prcvtusage(pup, upup); 1278 } 1279 ASSERT(nlwp == 0); 1280 1281 prunlock(pnp); 1282 1283 error = pr_uioread(php, size, uiop); 1284 kmem_free(pup, size + sizeof (prhusage_t)); 1285 return (error); 1286 } 1287 1288 static int 1289 pr_read_pagedata(prnode_t *pnp, uio_t *uiop) 1290 { 1291 proc_t *p; 1292 int error; 1293 1294 ASSERT(pnp->pr_type == PR_PAGEDATA); 1295 1296 if ((error = prlock(pnp, ZNO)) != 0) 1297 return (error); 1298 1299 p = pnp->pr_common->prc_proc; 1300 if ((p->p_flag & SSYS) || p->p_as == &kas) { 1301 prunlock(pnp); 1302 return (0); 1303 } 1304 1305 mutex_exit(&p->p_lock); 1306 error = prpdread(p, pnp->pr_hatid, uiop); 1307 mutex_enter(&p->p_lock); 1308 1309 prunlock(pnp); 1310 return (error); 1311 } 1312 1313 static int 1314 pr_read_opagedata(prnode_t *pnp, uio_t *uiop) 1315 { 1316 proc_t *p; 1317 struct as *as; 1318 int error; 1319 1320 ASSERT(pnp->pr_type == PR_OPAGEDATA); 1321 1322 if ((error = prlock(pnp, ZNO)) != 0) 1323 return (error); 1324 1325 p = pnp->pr_common->prc_proc; 1326 as = p->p_as; 1327 if ((p->p_flag & SSYS) || as == &kas) { 1328 prunlock(pnp); 1329 return (0); 1330 } 1331 1332 mutex_exit(&p->p_lock); 1333 error = oprpdread(as, pnp->pr_hatid, uiop); 1334 mutex_enter(&p->p_lock); 1335 1336 prunlock(pnp); 1337 return (error); 1338 } 1339 1340 static int 1341 pr_read_watch(prnode_t *pnp, uio_t *uiop) 1342 { 1343 proc_t *p; 1344 int error; 1345 prwatch_t *Bpwp; 1346 size_t size; 1347 prwatch_t *pwp; 1348 int nwarea; 1349 struct watched_area *pwarea; 1350 1351 ASSERT(pnp->pr_type == PR_WATCH); 1352 1353 if ((error = prlock(pnp, ZNO)) != 0) 1354 return (error); 1355 1356 p = pnp->pr_common->prc_proc; 1357 nwarea = avl_numnodes(&p->p_warea); 1358 size = nwarea * sizeof (prwatch_t); 1359 if (uiop->uio_offset >= size) { 1360 prunlock(pnp); 1361 return (0); 1362 } 1363 1364 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 1365 mutex_exit(&p->p_lock); 1366 Bpwp = pwp = kmem_zalloc(size, KM_SLEEP); 1367 mutex_enter(&p->p_lock); 1368 /* p->p_nwarea can't change while process is locked */ 1369 ASSERT(nwarea == avl_numnodes(&p->p_warea)); 1370 1371 /* gather the watched areas */ 1372 for (pwarea = avl_first(&p->p_warea); pwarea != NULL; 1373 pwarea = AVL_NEXT(&p->p_warea, pwarea), pwp++) { 1374 pwp->pr_vaddr = (uintptr_t)pwarea->wa_vaddr; 1375 pwp->pr_size = pwarea->wa_eaddr - pwarea->wa_vaddr; 1376 pwp->pr_wflags = (int)pwarea->wa_flags; 1377 } 1378 1379 prunlock(pnp); 1380 1381 error = pr_uioread(Bpwp, size, uiop); 1382 kmem_free(Bpwp, size); 1383 return (error); 1384 } 1385 1386 static int 1387 pr_read_lwpstatus(prnode_t *pnp, uio_t *uiop) 1388 { 1389 lwpstatus_t *sp; 1390 int error; 1391 1392 ASSERT(pnp->pr_type == PR_LWPSTATUS); 1393 1394 /* 1395 * We kmem_alloc() the lwpstatus structure because 1396 * it is so big it might blow the kernel stack. 1397 */ 1398 sp = kmem_alloc(sizeof (*sp), KM_SLEEP); 1399 1400 if ((error = prlock(pnp, ZNO)) != 0) 1401 goto out; 1402 1403 if (uiop->uio_offset >= sizeof (*sp)) { 1404 prunlock(pnp); 1405 goto out; 1406 } 1407 1408 prgetlwpstatus(pnp->pr_common->prc_thread, sp, VTOZONE(PTOV(pnp))); 1409 prunlock(pnp); 1410 1411 error = pr_uioread(sp, sizeof (*sp), uiop); 1412 out: 1413 kmem_free(sp, sizeof (*sp)); 1414 return (error); 1415 } 1416 1417 static int 1418 pr_read_lwpsinfo(prnode_t *pnp, uio_t *uiop) 1419 { 1420 lwpsinfo_t lwpsinfo; 1421 proc_t *p; 1422 kthread_t *t; 1423 lwpent_t *lep; 1424 1425 ASSERT(pnp->pr_type == PR_LWPSINFO); 1426 1427 /* 1428 * We don't want the full treatment of prlock(pnp) here. 1429 * This file is world-readable and never goes invalid. 1430 * It doesn't matter if we are in the middle of an exec(). 1431 */ 1432 p = pr_p_lock(pnp); 1433 mutex_exit(&pr_pidlock); 1434 if (p == NULL) 1435 return (ENOENT); 1436 ASSERT(p == pnp->pr_common->prc_proc); 1437 if (pnp->pr_common->prc_tslot == -1) { 1438 prunlock(pnp); 1439 return (ENOENT); 1440 } 1441 1442 if (uiop->uio_offset >= sizeof (lwpsinfo)) { 1443 prunlock(pnp); 1444 return (0); 1445 } 1446 1447 if ((t = pnp->pr_common->prc_thread) != NULL) 1448 prgetlwpsinfo(t, &lwpsinfo); 1449 else { 1450 lep = p->p_lwpdir[pnp->pr_common->prc_tslot].ld_entry; 1451 bzero(&lwpsinfo, sizeof (lwpsinfo)); 1452 lwpsinfo.pr_lwpid = lep->le_lwpid; 1453 lwpsinfo.pr_state = SZOMB; 1454 lwpsinfo.pr_sname = 'Z'; 1455 lwpsinfo.pr_start.tv_sec = lep->le_start; 1456 lwpsinfo.pr_bindpro = PBIND_NONE; 1457 lwpsinfo.pr_bindpset = PS_NONE; 1458 } 1459 prunlock(pnp); 1460 1461 return (pr_uioread(&lwpsinfo, sizeof (lwpsinfo), uiop)); 1462 } 1463 1464 static int 1465 pr_read_lwpusage(prnode_t *pnp, uio_t *uiop) 1466 { 1467 prhusage_t *pup; 1468 prusage_t *upup; 1469 proc_t *p; 1470 int error; 1471 1472 ASSERT(pnp->pr_type == PR_LWPUSAGE); 1473 1474 /* allocate now, before locking the process */ 1475 pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); 1476 upup = kmem_alloc(sizeof (*upup), KM_SLEEP); 1477 1478 /* 1479 * We don't want the full treatment of prlock(pnp) here. 1480 * This file is world-readable and never goes invalid. 1481 * It doesn't matter if we are in the middle of an exec(). 1482 */ 1483 p = pr_p_lock(pnp); 1484 mutex_exit(&pr_pidlock); 1485 if (p == NULL) { 1486 error = ENOENT; 1487 goto out; 1488 } 1489 ASSERT(p == pnp->pr_common->prc_proc); 1490 if (pnp->pr_common->prc_thread == NULL) { 1491 prunlock(pnp); 1492 error = ENOENT; 1493 goto out; 1494 } 1495 if (uiop->uio_offset >= sizeof (prusage_t)) { 1496 prunlock(pnp); 1497 error = 0; 1498 goto out; 1499 } 1500 1501 pup->pr_tstamp = gethrtime(); 1502 prgetusage(pnp->pr_common->prc_thread, pup); 1503 1504 prunlock(pnp); 1505 1506 prcvtusage(pup, upup); 1507 1508 error = pr_uioread(upup, sizeof (prusage_t), uiop); 1509 out: 1510 kmem_free(pup, sizeof (*pup)); 1511 kmem_free(upup, sizeof (*upup)); 1512 return (error); 1513 } 1514 1515 /* ARGSUSED */ 1516 static int 1517 pr_read_xregs(prnode_t *pnp, uio_t *uiop) 1518 { 1519 #if defined(__sparc) 1520 proc_t *p; 1521 kthread_t *t; 1522 int error; 1523 char *xreg; 1524 size_t size; 1525 1526 ASSERT(pnp->pr_type == PR_XREGS); 1527 1528 xreg = kmem_zalloc(sizeof (prxregset_t), KM_SLEEP); 1529 1530 if ((error = prlock(pnp, ZNO)) != 0) 1531 goto out; 1532 1533 p = pnp->pr_common->prc_proc; 1534 t = pnp->pr_common->prc_thread; 1535 1536 size = prhasx(p)? prgetprxregsize(p) : 0; 1537 if (uiop->uio_offset >= size) { 1538 prunlock(pnp); 1539 goto out; 1540 } 1541 1542 /* drop p->p_lock while (possibly) touching the stack */ 1543 mutex_exit(&p->p_lock); 1544 prgetprxregs(ttolwp(t), xreg); 1545 mutex_enter(&p->p_lock); 1546 prunlock(pnp); 1547 1548 error = pr_uioread(xreg, size, uiop); 1549 out: 1550 kmem_free(xreg, sizeof (prxregset_t)); 1551 return (error); 1552 #else 1553 return (0); 1554 #endif 1555 } 1556 1557 #if defined(__sparc) 1558 1559 static int 1560 pr_read_gwindows(prnode_t *pnp, uio_t *uiop) 1561 { 1562 proc_t *p; 1563 kthread_t *t; 1564 gwindows_t *gwp; 1565 int error; 1566 size_t size; 1567 1568 ASSERT(pnp->pr_type == PR_GWINDOWS); 1569 1570 gwp = kmem_zalloc(sizeof (gwindows_t), KM_SLEEP); 1571 1572 if ((error = prlock(pnp, ZNO)) != 0) 1573 goto out; 1574 1575 p = pnp->pr_common->prc_proc; 1576 t = pnp->pr_common->prc_thread; 1577 1578 /* 1579 * Drop p->p_lock while touching the stack. 1580 * The P_PR_LOCK flag prevents the lwp from 1581 * disappearing while we do this. 1582 */ 1583 mutex_exit(&p->p_lock); 1584 if ((size = prnwindows(ttolwp(t))) != 0) 1585 size = sizeof (gwindows_t) - 1586 (SPARC_MAXREGWINDOW - size) * sizeof (struct rwindow); 1587 if (uiop->uio_offset >= size) { 1588 mutex_enter(&p->p_lock); 1589 prunlock(pnp); 1590 goto out; 1591 } 1592 prgetwindows(ttolwp(t), gwp); 1593 mutex_enter(&p->p_lock); 1594 prunlock(pnp); 1595 1596 error = pr_uioread(gwp, size, uiop); 1597 out: 1598 kmem_free(gwp, sizeof (gwindows_t)); 1599 return (error); 1600 } 1601 1602 /* ARGSUSED */ 1603 static int 1604 pr_read_asrs(prnode_t *pnp, uio_t *uiop) 1605 { 1606 int error; 1607 1608 ASSERT(pnp->pr_type == PR_ASRS); 1609 1610 /* the asrs file exists only for sparc v9 _LP64 processes */ 1611 if ((error = prlock(pnp, ZNO)) == 0) { 1612 proc_t *p = pnp->pr_common->prc_proc; 1613 kthread_t *t = pnp->pr_common->prc_thread; 1614 asrset_t asrset; 1615 1616 if (p->p_model != DATAMODEL_LP64 || 1617 uiop->uio_offset >= sizeof (asrset_t)) { 1618 prunlock(pnp); 1619 return (0); 1620 } 1621 1622 /* 1623 * Drop p->p_lock while touching the stack. 1624 * The P_PR_LOCK flag prevents the lwp from 1625 * disappearing while we do this. 1626 */ 1627 mutex_exit(&p->p_lock); 1628 prgetasregs(ttolwp(t), asrset); 1629 mutex_enter(&p->p_lock); 1630 prunlock(pnp); 1631 1632 error = pr_uioread(&asrset[0], sizeof (asrset_t), uiop); 1633 } 1634 1635 return (error); 1636 } 1637 1638 #endif /* __sparc */ 1639 1640 static int 1641 pr_read_piddir(prnode_t *pnp, uio_t *uiop) 1642 { 1643 ASSERT(pnp->pr_type == PR_PIDDIR); 1644 ASSERT(pnp->pr_pidfile != NULL); 1645 1646 /* use the underlying PR_PIDFILE to read the process */ 1647 pnp = VTOP(pnp->pr_pidfile); 1648 ASSERT(pnp->pr_type == PR_PIDFILE); 1649 1650 return (pr_read_pidfile(pnp, uiop)); 1651 } 1652 1653 static int 1654 pr_read_pidfile(prnode_t *pnp, uio_t *uiop) 1655 { 1656 int error; 1657 1658 ASSERT(pnp->pr_type == PR_PIDFILE || pnp->pr_type == PR_LWPIDFILE); 1659 1660 if ((error = prlock(pnp, ZNO)) == 0) { 1661 proc_t *p = pnp->pr_common->prc_proc; 1662 struct as *as = p->p_as; 1663 1664 if ((p->p_flag & SSYS) || as == &kas) { 1665 /* 1666 * /proc I/O cannot be done to a system process. 1667 */ 1668 error = EIO; /* old /proc semantics */ 1669 } else { 1670 /* 1671 * We drop p_lock because we don't want to hold 1672 * it over an I/O operation because that could 1673 * lead to deadlock with the clock thread. 1674 * The process will not disappear and its address 1675 * space will not change because it is marked P_PR_LOCK. 1676 */ 1677 mutex_exit(&p->p_lock); 1678 error = prusrio(p, UIO_READ, uiop, 1); 1679 mutex_enter(&p->p_lock); 1680 } 1681 prunlock(pnp); 1682 } 1683 1684 return (error); 1685 } 1686 1687 #ifdef _SYSCALL32_IMPL 1688 1689 /* 1690 * Array of ILP32 read functions, indexed by /proc file type. 1691 */ 1692 static int pr_read_status_32(), 1693 pr_read_lstatus_32(), pr_read_psinfo_32(), pr_read_lpsinfo_32(), 1694 pr_read_map_32(), pr_read_rmap_32(), pr_read_xmap_32(), 1695 pr_read_sigact_32(), pr_read_auxv_32(), 1696 pr_read_usage_32(), pr_read_lusage_32(), pr_read_pagedata_32(), 1697 pr_read_watch_32(), pr_read_lwpstatus_32(), pr_read_lwpsinfo_32(), 1698 pr_read_lwpusage_32(), 1699 #if defined(__sparc) 1700 pr_read_gwindows_32(), 1701 #endif 1702 pr_read_opagedata_32(); 1703 1704 static int (*pr_read_function_32[PR_NFILES])() = { 1705 pr_read_inval, /* /proc */ 1706 pr_read_inval, /* /proc/self */ 1707 pr_read_piddir, /* /proc/<pid> (old /proc read()) */ 1708 pr_read_as, /* /proc/<pid>/as */ 1709 pr_read_inval, /* /proc/<pid>/ctl */ 1710 pr_read_status_32, /* /proc/<pid>/status */ 1711 pr_read_lstatus_32, /* /proc/<pid>/lstatus */ 1712 pr_read_psinfo_32, /* /proc/<pid>/psinfo */ 1713 pr_read_lpsinfo_32, /* /proc/<pid>/lpsinfo */ 1714 pr_read_map_32, /* /proc/<pid>/map */ 1715 pr_read_rmap_32, /* /proc/<pid>/rmap */ 1716 pr_read_xmap_32, /* /proc/<pid>/xmap */ 1717 pr_read_cred, /* /proc/<pid>/cred */ 1718 pr_read_sigact_32, /* /proc/<pid>/sigact */ 1719 pr_read_auxv_32, /* /proc/<pid>/auxv */ 1720 #if defined(__x86) 1721 pr_read_ldt, /* /proc/<pid>/ldt */ 1722 #endif 1723 pr_read_usage_32, /* /proc/<pid>/usage */ 1724 pr_read_lusage_32, /* /proc/<pid>/lusage */ 1725 pr_read_pagedata_32, /* /proc/<pid>/pagedata */ 1726 pr_read_watch_32, /* /proc/<pid>/watch */ 1727 pr_read_inval, /* /proc/<pid>/cwd */ 1728 pr_read_inval, /* /proc/<pid>/root */ 1729 pr_read_inval, /* /proc/<pid>/fd */ 1730 pr_read_inval, /* /proc/<pid>/fd/nn */ 1731 pr_read_inval, /* /proc/<pid>/object */ 1732 pr_read_inval, /* /proc/<pid>/object/xxx */ 1733 pr_read_inval, /* /proc/<pid>/lwp */ 1734 pr_read_inval, /* /proc/<pid>/lwp/<lwpid> */ 1735 pr_read_inval, /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 1736 pr_read_lwpstatus_32, /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 1737 pr_read_lwpsinfo_32, /* /proc/<pid>/lwp/<lwpid>/lwpsinfo */ 1738 pr_read_lwpusage_32, /* /proc/<pid>/lwp/<lwpid>/lwpusage */ 1739 pr_read_xregs, /* /proc/<pid>/lwp/<lwpid>/xregs */ 1740 pr_read_inval, /* /proc/<pid>/lwp/<lwpid>/templates */ 1741 pr_read_inval, /* /proc/<pid>/lwp/<lwpid>/templates/<id> */ 1742 #if defined(__sparc) 1743 pr_read_gwindows_32, /* /proc/<pid>/lwp/<lwpid>/gwindows */ 1744 pr_read_asrs, /* /proc/<pid>/lwp/<lwpid>/asrs */ 1745 #endif 1746 pr_read_priv, /* /proc/<pid>/priv */ 1747 pr_read_inval, /* /proc/<pid>/path */ 1748 pr_read_inval, /* /proc/<pid>/path/xxx */ 1749 pr_read_inval, /* /proc/<pid>/contracts */ 1750 pr_read_inval, /* /proc/<pid>/contracts/<ctid> */ 1751 pr_read_pidfile, /* old process file */ 1752 pr_read_pidfile, /* old lwp file */ 1753 pr_read_opagedata_32, /* old pagedata file */ 1754 }; 1755 1756 static int 1757 pr_read_status_32(prnode_t *pnp, uio_t *uiop) 1758 { 1759 pstatus32_t *sp; 1760 proc_t *p; 1761 int error; 1762 1763 ASSERT(pnp->pr_type == PR_STATUS); 1764 1765 /* 1766 * We kmem_alloc() the pstatus structure because 1767 * it is so big it might blow the kernel stack. 1768 */ 1769 sp = kmem_alloc(sizeof (*sp), KM_SLEEP); 1770 if ((error = prlock(pnp, ZNO)) == 0) { 1771 /* 1772 * A 32-bit process cannot get the status of a 64-bit process. 1773 * The fields for the 64-bit quantities are not large enough. 1774 */ 1775 p = pnp->pr_common->prc_proc; 1776 if (PROCESS_NOT_32BIT(p)) { 1777 prunlock(pnp); 1778 error = EOVERFLOW; 1779 } else { 1780 prgetstatus32(pnp->pr_common->prc_proc, sp, 1781 VTOZONE(PTOV(pnp))); 1782 prunlock(pnp); 1783 error = pr_uioread(sp, sizeof (*sp), uiop); 1784 } 1785 } 1786 kmem_free((caddr_t)sp, sizeof (*sp)); 1787 return (error); 1788 } 1789 1790 static int 1791 pr_read_lstatus_32(prnode_t *pnp, uio_t *uiop) 1792 { 1793 proc_t *p; 1794 kthread_t *t; 1795 lwpdir_t *ldp; 1796 size_t size; 1797 prheader32_t *php; 1798 lwpstatus32_t *sp; 1799 int error; 1800 int nlwp; 1801 int i; 1802 1803 ASSERT(pnp->pr_type == PR_LSTATUS); 1804 1805 if ((error = prlock(pnp, ZNO)) != 0) 1806 return (error); 1807 p = pnp->pr_common->prc_proc; 1808 /* 1809 * A 32-bit process cannot get the status of a 64-bit process. 1810 * The fields for the 64-bit quantities are not large enough. 1811 */ 1812 if (PROCESS_NOT_32BIT(p)) { 1813 prunlock(pnp); 1814 return (EOVERFLOW); 1815 } 1816 nlwp = p->p_lwpcnt; 1817 size = sizeof (prheader32_t) + nlwp * LSPAN32(lwpstatus32_t); 1818 1819 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 1820 mutex_exit(&p->p_lock); 1821 php = kmem_zalloc(size, KM_SLEEP); 1822 mutex_enter(&p->p_lock); 1823 /* p->p_lwpcnt can't change while process is locked */ 1824 ASSERT(nlwp == p->p_lwpcnt); 1825 1826 php->pr_nent = nlwp; 1827 php->pr_entsize = LSPAN32(lwpstatus32_t); 1828 1829 sp = (lwpstatus32_t *)(php + 1); 1830 for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { 1831 if (ldp->ld_entry == NULL || 1832 (t = ldp->ld_entry->le_thread) == NULL) 1833 continue; 1834 prgetlwpstatus32(t, sp, VTOZONE(PTOV(pnp))); 1835 sp = (lwpstatus32_t *)((caddr_t)sp + LSPAN32(lwpstatus32_t)); 1836 } 1837 prunlock(pnp); 1838 1839 error = pr_uioread(php, size, uiop); 1840 kmem_free(php, size); 1841 return (error); 1842 } 1843 1844 static int 1845 pr_read_psinfo_32(prnode_t *pnp, uio_t *uiop) 1846 { 1847 psinfo32_t psinfo; 1848 proc_t *p; 1849 int error = 0; 1850 1851 ASSERT(pnp->pr_type == PR_PSINFO); 1852 1853 /* 1854 * We don't want the full treatment of prlock(pnp) here. 1855 * This file is world-readable and never goes invalid. 1856 * It doesn't matter if we are in the middle of an exec(). 1857 */ 1858 p = pr_p_lock(pnp); 1859 mutex_exit(&pr_pidlock); 1860 if (p == NULL) 1861 error = ENOENT; 1862 else { 1863 ASSERT(p == pnp->pr_common->prc_proc); 1864 prgetpsinfo32(p, &psinfo); 1865 prunlock(pnp); 1866 error = pr_uioread(&psinfo, sizeof (psinfo), uiop); 1867 } 1868 return (error); 1869 } 1870 1871 static int 1872 pr_read_lpsinfo_32(prnode_t *pnp, uio_t *uiop) 1873 { 1874 proc_t *p; 1875 kthread_t *t; 1876 lwpdir_t *ldp; 1877 lwpent_t *lep; 1878 size_t size; 1879 prheader32_t *php; 1880 lwpsinfo32_t *sp; 1881 int error; 1882 int nlwp; 1883 int i; 1884 1885 ASSERT(pnp->pr_type == PR_LPSINFO); 1886 1887 /* 1888 * We don't want the full treatment of prlock(pnp) here. 1889 * This file is world-readable and never goes invalid. 1890 * It doesn't matter if we are in the middle of an exec(). 1891 */ 1892 p = pr_p_lock(pnp); 1893 mutex_exit(&pr_pidlock); 1894 if (p == NULL) 1895 return (ENOENT); 1896 ASSERT(p == pnp->pr_common->prc_proc); 1897 if ((nlwp = p->p_lwpcnt + p->p_zombcnt) == 0) { 1898 prunlock(pnp); 1899 return (ENOENT); 1900 } 1901 size = sizeof (prheader32_t) + nlwp * LSPAN32(lwpsinfo32_t); 1902 1903 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 1904 mutex_exit(&p->p_lock); 1905 php = kmem_zalloc(size, KM_SLEEP); 1906 mutex_enter(&p->p_lock); 1907 /* p->p_lwpcnt can't change while process is locked */ 1908 ASSERT(nlwp == p->p_lwpcnt + p->p_zombcnt); 1909 1910 php->pr_nent = nlwp; 1911 php->pr_entsize = LSPAN32(lwpsinfo32_t); 1912 1913 sp = (lwpsinfo32_t *)(php + 1); 1914 for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { 1915 if ((lep = ldp->ld_entry) == NULL) 1916 continue; 1917 if ((t = lep->le_thread) != NULL) 1918 prgetlwpsinfo32(t, sp); 1919 else { 1920 bzero(sp, sizeof (*sp)); 1921 sp->pr_lwpid = lep->le_lwpid; 1922 sp->pr_state = SZOMB; 1923 sp->pr_sname = 'Z'; 1924 sp->pr_start.tv_sec = (time32_t)lep->le_start; 1925 } 1926 sp = (lwpsinfo32_t *)((caddr_t)sp + LSPAN32(lwpsinfo32_t)); 1927 } 1928 prunlock(pnp); 1929 1930 error = pr_uioread(php, size, uiop); 1931 kmem_free(php, size); 1932 return (error); 1933 } 1934 1935 static int 1936 pr_read_map_common_32(prnode_t *pnp, uio_t *uiop, prnodetype_t type) 1937 { 1938 proc_t *p; 1939 struct as *as; 1940 list_t iolhead; 1941 int error; 1942 1943 if ((error = prlock(pnp, ZNO)) != 0) 1944 return (error); 1945 1946 p = pnp->pr_common->prc_proc; 1947 as = p->p_as; 1948 1949 if ((p->p_flag & SSYS) || as == &kas) { 1950 prunlock(pnp); 1951 return (0); 1952 } 1953 1954 if (PROCESS_NOT_32BIT(p)) { 1955 prunlock(pnp); 1956 return (EOVERFLOW); 1957 } 1958 1959 mutex_exit(&p->p_lock); 1960 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 1961 switch (type) { 1962 case PR_XMAP: 1963 error = prgetxmap32(p, &iolhead); 1964 break; 1965 case PR_RMAP: 1966 error = prgetmap32(p, 1, &iolhead); 1967 break; 1968 case PR_MAP: 1969 error = prgetmap32(p, 0, &iolhead); 1970 break; 1971 } 1972 AS_LOCK_EXIT(as, &as->a_lock); 1973 mutex_enter(&p->p_lock); 1974 prunlock(pnp); 1975 1976 error = pr_iol_uiomove_and_free(&iolhead, uiop, error); 1977 1978 return (error); 1979 } 1980 1981 static int 1982 pr_read_map_32(prnode_t *pnp, uio_t *uiop) 1983 { 1984 ASSERT(pnp->pr_type == PR_MAP); 1985 return (pr_read_map_common_32(pnp, uiop, pnp->pr_type)); 1986 } 1987 1988 static int 1989 pr_read_rmap_32(prnode_t *pnp, uio_t *uiop) 1990 { 1991 ASSERT(pnp->pr_type == PR_RMAP); 1992 return (pr_read_map_common_32(pnp, uiop, pnp->pr_type)); 1993 } 1994 1995 static int 1996 pr_read_xmap_32(prnode_t *pnp, uio_t *uiop) 1997 { 1998 ASSERT(pnp->pr_type == PR_XMAP); 1999 return (pr_read_map_common_32(pnp, uiop, pnp->pr_type)); 2000 } 2001 2002 static int 2003 pr_read_sigact_32(prnode_t *pnp, uio_t *uiop) 2004 { 2005 proc_t *p; 2006 struct sigaction32 *sap; 2007 int sig; 2008 int error; 2009 user_t *up; 2010 2011 ASSERT(pnp->pr_type == PR_SIGACT); 2012 2013 /* 2014 * We kmem_alloc() the sigaction32 array because 2015 * it is so big it might blow the kernel stack. 2016 */ 2017 sap = kmem_alloc((NSIG-1) * sizeof (struct sigaction32), KM_SLEEP); 2018 2019 if ((error = prlock(pnp, ZNO)) != 0) 2020 goto out; 2021 p = pnp->pr_common->prc_proc; 2022 2023 if (PROCESS_NOT_32BIT(p)) { 2024 prunlock(pnp); 2025 error = EOVERFLOW; 2026 goto out; 2027 } 2028 2029 if (uiop->uio_offset >= (NSIG-1) * sizeof (struct sigaction32)) { 2030 prunlock(pnp); 2031 goto out; 2032 } 2033 2034 up = PTOU(p); 2035 for (sig = 1; sig < NSIG; sig++) 2036 prgetaction32(p, up, sig, &sap[sig-1]); 2037 prunlock(pnp); 2038 2039 error = pr_uioread(sap, (NSIG - 1) * sizeof (struct sigaction32), uiop); 2040 out: 2041 kmem_free(sap, (NSIG-1) * sizeof (struct sigaction32)); 2042 return (error); 2043 } 2044 2045 static int 2046 pr_read_auxv_32(prnode_t *pnp, uio_t *uiop) 2047 { 2048 auxv32_t auxv[__KERN_NAUXV_IMPL]; 2049 proc_t *p; 2050 user_t *up; 2051 int error; 2052 int i; 2053 2054 ASSERT(pnp->pr_type == PR_AUXV); 2055 2056 if ((error = prlock(pnp, ZNO)) != 0) 2057 return (error); 2058 p = pnp->pr_common->prc_proc; 2059 2060 if (PROCESS_NOT_32BIT(p)) { 2061 prunlock(pnp); 2062 return (EOVERFLOW); 2063 } 2064 2065 if (uiop->uio_offset >= sizeof (auxv)) { 2066 prunlock(pnp); 2067 return (0); 2068 } 2069 2070 up = PTOU(p); 2071 for (i = 0; i < __KERN_NAUXV_IMPL; i++) { 2072 auxv[i].a_type = (int32_t)up->u_auxv[i].a_type; 2073 auxv[i].a_un.a_val = (int32_t)up->u_auxv[i].a_un.a_val; 2074 } 2075 prunlock(pnp); 2076 2077 return (pr_uioread(auxv, sizeof (auxv), uiop)); 2078 } 2079 2080 static int 2081 pr_read_usage_32(prnode_t *pnp, uio_t *uiop) 2082 { 2083 prhusage_t *pup; 2084 prusage32_t *upup; 2085 proc_t *p; 2086 kthread_t *t; 2087 int error; 2088 2089 ASSERT(pnp->pr_type == PR_USAGE); 2090 2091 /* allocate now, before locking the process */ 2092 pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); 2093 upup = kmem_alloc(sizeof (*upup), KM_SLEEP); 2094 2095 /* 2096 * We don't want the full treatment of prlock(pnp) here. 2097 * This file is world-readable and never goes invalid. 2098 * It doesn't matter if we are in the middle of an exec(). 2099 */ 2100 p = pr_p_lock(pnp); 2101 mutex_exit(&pr_pidlock); 2102 if (p == NULL) { 2103 error = ENOENT; 2104 goto out; 2105 } 2106 ASSERT(p == pnp->pr_common->prc_proc); 2107 2108 if (uiop->uio_offset >= sizeof (prusage32_t)) { 2109 prunlock(pnp); 2110 error = 0; 2111 goto out; 2112 } 2113 2114 pup->pr_tstamp = gethrtime(); 2115 2116 pup->pr_count = p->p_defunct; 2117 pup->pr_create = p->p_mstart; 2118 pup->pr_term = p->p_mterm; 2119 2120 pup->pr_rtime = p->p_mlreal; 2121 pup->pr_utime = p->p_acct[LMS_USER]; 2122 pup->pr_stime = p->p_acct[LMS_SYSTEM]; 2123 pup->pr_ttime = p->p_acct[LMS_TRAP]; 2124 pup->pr_tftime = p->p_acct[LMS_TFAULT]; 2125 pup->pr_dftime = p->p_acct[LMS_DFAULT]; 2126 pup->pr_kftime = p->p_acct[LMS_KFAULT]; 2127 pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; 2128 pup->pr_slptime = p->p_acct[LMS_SLEEP]; 2129 pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; 2130 pup->pr_stoptime = p->p_acct[LMS_STOPPED]; 2131 2132 pup->pr_minf = p->p_ru.minflt; 2133 pup->pr_majf = p->p_ru.majflt; 2134 pup->pr_nswap = p->p_ru.nswap; 2135 pup->pr_inblk = p->p_ru.inblock; 2136 pup->pr_oublk = p->p_ru.oublock; 2137 pup->pr_msnd = p->p_ru.msgsnd; 2138 pup->pr_mrcv = p->p_ru.msgrcv; 2139 pup->pr_sigs = p->p_ru.nsignals; 2140 pup->pr_vctx = p->p_ru.nvcsw; 2141 pup->pr_ictx = p->p_ru.nivcsw; 2142 pup->pr_sysc = p->p_ru.sysc; 2143 pup->pr_ioch = p->p_ru.ioch; 2144 2145 /* 2146 * Add the usage information for each active lwp. 2147 */ 2148 if ((t = p->p_tlist) != NULL && 2149 !(pnp->pr_pcommon->prc_flags & PRC_DESTROY)) { 2150 do { 2151 if (t->t_proc_flag & TP_LWPEXIT) 2152 continue; 2153 pup->pr_count++; 2154 praddusage(t, pup); 2155 } while ((t = t->t_forw) != p->p_tlist); 2156 } 2157 2158 prunlock(pnp); 2159 2160 prcvtusage32(pup, upup); 2161 2162 error = pr_uioread(upup, sizeof (prusage32_t), uiop); 2163 out: 2164 kmem_free(pup, sizeof (*pup)); 2165 kmem_free(upup, sizeof (*upup)); 2166 return (error); 2167 } 2168 2169 static int 2170 pr_read_lusage_32(prnode_t *pnp, uio_t *uiop) 2171 { 2172 int nlwp; 2173 prhusage_t *pup; 2174 prheader32_t *php; 2175 prusage32_t *upup; 2176 size_t size; 2177 hrtime_t curtime; 2178 proc_t *p; 2179 kthread_t *t; 2180 lwpdir_t *ldp; 2181 int error; 2182 int i; 2183 2184 ASSERT(pnp->pr_type == PR_LUSAGE); 2185 2186 /* 2187 * We don't want the full treatment of prlock(pnp) here. 2188 * This file is world-readable and never goes invalid. 2189 * It doesn't matter if we are in the middle of an exec(). 2190 */ 2191 p = pr_p_lock(pnp); 2192 mutex_exit(&pr_pidlock); 2193 if (p == NULL) 2194 return (ENOENT); 2195 ASSERT(p == pnp->pr_common->prc_proc); 2196 if ((nlwp = p->p_lwpcnt) == 0) { 2197 prunlock(pnp); 2198 return (ENOENT); 2199 } 2200 2201 size = sizeof (prheader32_t) + (nlwp + 1) * LSPAN32(prusage32_t); 2202 if (uiop->uio_offset >= size) { 2203 prunlock(pnp); 2204 return (0); 2205 } 2206 2207 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 2208 mutex_exit(&p->p_lock); 2209 pup = kmem_zalloc(size + sizeof (prhusage_t), KM_SLEEP); 2210 mutex_enter(&p->p_lock); 2211 /* p->p_lwpcnt can't change while process is locked */ 2212 ASSERT(nlwp == p->p_lwpcnt); 2213 2214 php = (prheader32_t *)(pup + 1); 2215 upup = (prusage32_t *)(php + 1); 2216 2217 php->pr_nent = nlwp + 1; 2218 php->pr_entsize = LSPAN32(prusage32_t); 2219 2220 curtime = gethrtime(); 2221 2222 /* 2223 * First the summation over defunct lwps. 2224 */ 2225 pup->pr_count = p->p_defunct; 2226 pup->pr_tstamp = curtime; 2227 pup->pr_create = p->p_mstart; 2228 pup->pr_term = p->p_mterm; 2229 2230 pup->pr_rtime = p->p_mlreal; 2231 pup->pr_utime = p->p_acct[LMS_USER]; 2232 pup->pr_stime = p->p_acct[LMS_SYSTEM]; 2233 pup->pr_ttime = p->p_acct[LMS_TRAP]; 2234 pup->pr_tftime = p->p_acct[LMS_TFAULT]; 2235 pup->pr_dftime = p->p_acct[LMS_DFAULT]; 2236 pup->pr_kftime = p->p_acct[LMS_KFAULT]; 2237 pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; 2238 pup->pr_slptime = p->p_acct[LMS_SLEEP]; 2239 pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; 2240 pup->pr_stoptime = p->p_acct[LMS_STOPPED]; 2241 2242 pup->pr_minf = p->p_ru.minflt; 2243 pup->pr_majf = p->p_ru.majflt; 2244 pup->pr_nswap = p->p_ru.nswap; 2245 pup->pr_inblk = p->p_ru.inblock; 2246 pup->pr_oublk = p->p_ru.oublock; 2247 pup->pr_msnd = p->p_ru.msgsnd; 2248 pup->pr_mrcv = p->p_ru.msgrcv; 2249 pup->pr_sigs = p->p_ru.nsignals; 2250 pup->pr_vctx = p->p_ru.nvcsw; 2251 pup->pr_ictx = p->p_ru.nivcsw; 2252 pup->pr_sysc = p->p_ru.sysc; 2253 pup->pr_ioch = p->p_ru.ioch; 2254 2255 prcvtusage32(pup, upup); 2256 2257 /* 2258 * Fill one prusage struct for each active lwp. 2259 */ 2260 for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { 2261 if (ldp->ld_entry == NULL || 2262 (t = ldp->ld_entry->le_thread) == NULL) 2263 continue; 2264 ASSERT(!(t->t_proc_flag & TP_LWPEXIT)); 2265 ASSERT(nlwp > 0); 2266 --nlwp; 2267 upup = (prusage32_t *) 2268 ((caddr_t)upup + LSPAN32(prusage32_t)); 2269 prgetusage(t, pup); 2270 prcvtusage32(pup, upup); 2271 } 2272 ASSERT(nlwp == 0); 2273 2274 prunlock(pnp); 2275 2276 error = pr_uioread(php, size, uiop); 2277 kmem_free(pup, size + sizeof (prhusage_t)); 2278 return (error); 2279 } 2280 2281 static int 2282 pr_read_pagedata_32(prnode_t *pnp, uio_t *uiop) 2283 { 2284 proc_t *p; 2285 int error; 2286 2287 ASSERT(pnp->pr_type == PR_PAGEDATA); 2288 2289 if ((error = prlock(pnp, ZNO)) != 0) 2290 return (error); 2291 2292 p = pnp->pr_common->prc_proc; 2293 if ((p->p_flag & SSYS) || p->p_as == &kas) { 2294 prunlock(pnp); 2295 return (0); 2296 } 2297 2298 if (PROCESS_NOT_32BIT(p)) { 2299 prunlock(pnp); 2300 return (EOVERFLOW); 2301 } 2302 2303 mutex_exit(&p->p_lock); 2304 error = prpdread32(p, pnp->pr_hatid, uiop); 2305 mutex_enter(&p->p_lock); 2306 2307 prunlock(pnp); 2308 return (error); 2309 } 2310 2311 static int 2312 pr_read_opagedata_32(prnode_t *pnp, uio_t *uiop) 2313 { 2314 proc_t *p; 2315 struct as *as; 2316 int error; 2317 2318 ASSERT(pnp->pr_type == PR_OPAGEDATA); 2319 2320 if ((error = prlock(pnp, ZNO)) != 0) 2321 return (error); 2322 2323 p = pnp->pr_common->prc_proc; 2324 as = p->p_as; 2325 2326 if ((p->p_flag & SSYS) || as == &kas) { 2327 prunlock(pnp); 2328 return (0); 2329 } 2330 2331 if (PROCESS_NOT_32BIT(p)) { 2332 prunlock(pnp); 2333 return (EOVERFLOW); 2334 } 2335 2336 mutex_exit(&p->p_lock); 2337 error = oprpdread32(as, pnp->pr_hatid, uiop); 2338 mutex_enter(&p->p_lock); 2339 2340 prunlock(pnp); 2341 return (error); 2342 } 2343 2344 static int 2345 pr_read_watch_32(prnode_t *pnp, uio_t *uiop) 2346 { 2347 proc_t *p; 2348 int error; 2349 prwatch32_t *Bpwp; 2350 size_t size; 2351 prwatch32_t *pwp; 2352 int nwarea; 2353 struct watched_area *pwarea; 2354 2355 ASSERT(pnp->pr_type == PR_WATCH); 2356 2357 if ((error = prlock(pnp, ZNO)) != 0) 2358 return (error); 2359 2360 p = pnp->pr_common->prc_proc; 2361 if (PROCESS_NOT_32BIT(p)) { 2362 prunlock(pnp); 2363 return (EOVERFLOW); 2364 } 2365 nwarea = avl_numnodes(&p->p_warea); 2366 size = nwarea * sizeof (prwatch32_t); 2367 if (uiop->uio_offset >= size) { 2368 prunlock(pnp); 2369 return (0); 2370 } 2371 2372 /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ 2373 mutex_exit(&p->p_lock); 2374 Bpwp = pwp = kmem_zalloc(size, KM_SLEEP); 2375 mutex_enter(&p->p_lock); 2376 /* p->p_nwarea can't change while process is locked */ 2377 ASSERT(nwarea == avl_numnodes(&p->p_warea)); 2378 2379 /* gather the watched areas */ 2380 for (pwarea = avl_first(&p->p_warea); pwarea != NULL; 2381 pwarea = AVL_NEXT(&p->p_warea, pwarea), pwp++) { 2382 pwp->pr_vaddr = (caddr32_t)(uintptr_t)pwarea->wa_vaddr; 2383 pwp->pr_size = (size32_t)(pwarea->wa_eaddr - pwarea->wa_vaddr); 2384 pwp->pr_wflags = (int)pwarea->wa_flags; 2385 } 2386 2387 prunlock(pnp); 2388 2389 error = pr_uioread(Bpwp, size, uiop); 2390 kmem_free(Bpwp, size); 2391 return (error); 2392 } 2393 2394 static int 2395 pr_read_lwpstatus_32(prnode_t *pnp, uio_t *uiop) 2396 { 2397 lwpstatus32_t *sp; 2398 proc_t *p; 2399 int error; 2400 2401 ASSERT(pnp->pr_type == PR_LWPSTATUS); 2402 2403 /* 2404 * We kmem_alloc() the lwpstatus structure because 2405 * it is so big it might blow the kernel stack. 2406 */ 2407 sp = kmem_alloc(sizeof (*sp), KM_SLEEP); 2408 2409 if ((error = prlock(pnp, ZNO)) != 0) 2410 goto out; 2411 2412 /* 2413 * A 32-bit process cannot get the status of a 64-bit process. 2414 * The fields for the 64-bit quantities are not large enough. 2415 */ 2416 p = pnp->pr_common->prc_proc; 2417 if (PROCESS_NOT_32BIT(p)) { 2418 prunlock(pnp); 2419 error = EOVERFLOW; 2420 goto out; 2421 } 2422 2423 if (uiop->uio_offset >= sizeof (*sp)) { 2424 prunlock(pnp); 2425 goto out; 2426 } 2427 2428 prgetlwpstatus32(pnp->pr_common->prc_thread, sp, VTOZONE(PTOV(pnp))); 2429 prunlock(pnp); 2430 2431 error = pr_uioread(sp, sizeof (*sp), uiop); 2432 out: 2433 kmem_free(sp, sizeof (*sp)); 2434 return (error); 2435 } 2436 2437 static int 2438 pr_read_lwpsinfo_32(prnode_t *pnp, uio_t *uiop) 2439 { 2440 lwpsinfo32_t lwpsinfo; 2441 proc_t *p; 2442 kthread_t *t; 2443 lwpent_t *lep; 2444 2445 ASSERT(pnp->pr_type == PR_LWPSINFO); 2446 2447 /* 2448 * We don't want the full treatment of prlock(pnp) here. 2449 * This file is world-readable and never goes invalid. 2450 * It doesn't matter if we are in the middle of an exec(). 2451 */ 2452 p = pr_p_lock(pnp); 2453 mutex_exit(&pr_pidlock); 2454 if (p == NULL) 2455 return (ENOENT); 2456 ASSERT(p == pnp->pr_common->prc_proc); 2457 if (pnp->pr_common->prc_tslot == -1) { 2458 prunlock(pnp); 2459 return (ENOENT); 2460 } 2461 2462 if (uiop->uio_offset >= sizeof (lwpsinfo)) { 2463 prunlock(pnp); 2464 return (0); 2465 } 2466 2467 if ((t = pnp->pr_common->prc_thread) != NULL) 2468 prgetlwpsinfo32(t, &lwpsinfo); 2469 else { 2470 lep = p->p_lwpdir[pnp->pr_common->prc_tslot].ld_entry; 2471 bzero(&lwpsinfo, sizeof (lwpsinfo)); 2472 lwpsinfo.pr_lwpid = lep->le_lwpid; 2473 lwpsinfo.pr_state = SZOMB; 2474 lwpsinfo.pr_sname = 'Z'; 2475 lwpsinfo.pr_start.tv_sec = (time32_t)lep->le_start; 2476 } 2477 prunlock(pnp); 2478 2479 return (pr_uioread(&lwpsinfo, sizeof (lwpsinfo), uiop)); 2480 } 2481 2482 static int 2483 pr_read_lwpusage_32(prnode_t *pnp, uio_t *uiop) 2484 { 2485 prhusage_t *pup; 2486 prusage32_t *upup; 2487 proc_t *p; 2488 int error; 2489 2490 ASSERT(pnp->pr_type == PR_LWPUSAGE); 2491 2492 /* allocate now, before locking the process */ 2493 pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); 2494 upup = kmem_alloc(sizeof (*upup), KM_SLEEP); 2495 2496 /* 2497 * We don't want the full treatment of prlock(pnp) here. 2498 * This file is world-readable and never goes invalid. 2499 * It doesn't matter if we are in the middle of an exec(). 2500 */ 2501 p = pr_p_lock(pnp); 2502 mutex_exit(&pr_pidlock); 2503 if (p == NULL) { 2504 error = ENOENT; 2505 goto out; 2506 } 2507 ASSERT(p == pnp->pr_common->prc_proc); 2508 if (pnp->pr_common->prc_thread == NULL) { 2509 prunlock(pnp); 2510 error = ENOENT; 2511 goto out; 2512 } 2513 if (uiop->uio_offset >= sizeof (prusage32_t)) { 2514 prunlock(pnp); 2515 error = 0; 2516 goto out; 2517 } 2518 2519 pup->pr_tstamp = gethrtime(); 2520 prgetusage(pnp->pr_common->prc_thread, pup); 2521 2522 prunlock(pnp); 2523 2524 prcvtusage32(pup, upup); 2525 2526 error = pr_uioread(upup, sizeof (prusage32_t), uiop); 2527 out: 2528 kmem_free(pup, sizeof (*pup)); 2529 kmem_free(upup, sizeof (*upup)); 2530 return (error); 2531 } 2532 2533 #if defined(__sparc) 2534 static int 2535 pr_read_gwindows_32(prnode_t *pnp, uio_t *uiop) 2536 { 2537 proc_t *p; 2538 kthread_t *t; 2539 gwindows32_t *gwp; 2540 int error; 2541 size_t size; 2542 2543 ASSERT(pnp->pr_type == PR_GWINDOWS); 2544 2545 gwp = kmem_zalloc(sizeof (gwindows32_t), KM_SLEEP); 2546 2547 if ((error = prlock(pnp, ZNO)) != 0) 2548 goto out; 2549 2550 p = pnp->pr_common->prc_proc; 2551 t = pnp->pr_common->prc_thread; 2552 2553 if (PROCESS_NOT_32BIT(p)) { 2554 prunlock(pnp); 2555 error = EOVERFLOW; 2556 goto out; 2557 } 2558 2559 /* 2560 * Drop p->p_lock while touching the stack. 2561 * The P_PR_LOCK flag prevents the lwp from 2562 * disappearing while we do this. 2563 */ 2564 mutex_exit(&p->p_lock); 2565 if ((size = prnwindows(ttolwp(t))) != 0) 2566 size = sizeof (gwindows32_t) - 2567 (SPARC_MAXREGWINDOW - size) * sizeof (struct rwindow32); 2568 if (uiop->uio_offset >= size) { 2569 mutex_enter(&p->p_lock); 2570 prunlock(pnp); 2571 goto out; 2572 } 2573 prgetwindows32(ttolwp(t), gwp); 2574 mutex_enter(&p->p_lock); 2575 prunlock(pnp); 2576 2577 error = pr_uioread(gwp, size, uiop); 2578 out: 2579 kmem_free(gwp, sizeof (gwindows32_t)); 2580 return (error); 2581 } 2582 #endif /* __sparc */ 2583 2584 #endif /* _SYSCALL32_IMPL */ 2585 2586 /* ARGSUSED */ 2587 static int 2588 prread(vnode_t *vp, uio_t *uiop, int ioflag, cred_t *cr, caller_context_t *ct) 2589 { 2590 prnode_t *pnp = VTOP(vp); 2591 2592 ASSERT(pnp->pr_type < PR_NFILES); 2593 2594 #ifdef _SYSCALL32_IMPL 2595 /* 2596 * What is read from the /proc files depends on the data 2597 * model of the caller. An LP64 process will see LP64 2598 * data. An ILP32 process will see ILP32 data. 2599 */ 2600 if (curproc->p_model == DATAMODEL_LP64) 2601 return (pr_read_function[pnp->pr_type](pnp, uiop)); 2602 else 2603 return (pr_read_function_32[pnp->pr_type](pnp, uiop)); 2604 #else 2605 return (pr_read_function[pnp->pr_type](pnp, uiop)); 2606 #endif 2607 } 2608 2609 /* ARGSUSED */ 2610 static int 2611 prwrite(vnode_t *vp, uio_t *uiop, int ioflag, cred_t *cr, caller_context_t *ct) 2612 { 2613 prnode_t *pnp = VTOP(vp); 2614 int old = 0; 2615 int error; 2616 ssize_t resid; 2617 2618 ASSERT(pnp->pr_type < PR_NFILES); 2619 2620 /* 2621 * Only a handful of /proc files are writable, enumerate them here. 2622 */ 2623 switch (pnp->pr_type) { 2624 case PR_PIDDIR: /* directory write()s: visceral revulsion. */ 2625 ASSERT(pnp->pr_pidfile != NULL); 2626 /* use the underlying PR_PIDFILE to write the process */ 2627 vp = pnp->pr_pidfile; 2628 pnp = VTOP(vp); 2629 ASSERT(pnp->pr_type == PR_PIDFILE); 2630 /* FALLTHROUGH */ 2631 case PR_PIDFILE: 2632 case PR_LWPIDFILE: 2633 old = 1; 2634 /* FALLTHROUGH */ 2635 case PR_AS: 2636 if ((error = prlock(pnp, ZNO)) == 0) { 2637 proc_t *p = pnp->pr_common->prc_proc; 2638 struct as *as = p->p_as; 2639 2640 if ((p->p_flag & SSYS) || as == &kas) { 2641 /* 2642 * /proc I/O cannot be done to a system process. 2643 */ 2644 error = EIO; 2645 #ifdef _SYSCALL32_IMPL 2646 } else if (curproc->p_model == DATAMODEL_ILP32 && 2647 PROCESS_NOT_32BIT(p)) { 2648 error = EOVERFLOW; 2649 #endif 2650 } else { 2651 /* 2652 * See comments above (pr_read_pidfile) 2653 * about this locking dance. 2654 */ 2655 mutex_exit(&p->p_lock); 2656 error = prusrio(p, UIO_WRITE, uiop, old); 2657 mutex_enter(&p->p_lock); 2658 } 2659 prunlock(pnp); 2660 } 2661 return (error); 2662 2663 case PR_CTL: 2664 case PR_LWPCTL: 2665 resid = uiop->uio_resid; 2666 /* 2667 * Perform the action on the control file 2668 * by passing curthreads credentials 2669 * and not target process's credentials. 2670 */ 2671 #ifdef _SYSCALL32_IMPL 2672 if (curproc->p_model == DATAMODEL_ILP32) 2673 error = prwritectl32(vp, uiop, CRED()); 2674 else 2675 error = prwritectl(vp, uiop, CRED()); 2676 #else 2677 error = prwritectl(vp, uiop, CRED()); 2678 #endif 2679 /* 2680 * This hack makes sure that the EINTR is passed 2681 * all the way back to the caller's write() call. 2682 */ 2683 if (error == EINTR) 2684 uiop->uio_resid = resid; 2685 return (error); 2686 2687 default: 2688 return ((vp->v_type == VDIR)? EISDIR : EBADF); 2689 } 2690 /* NOTREACHED */ 2691 } 2692 2693 static int 2694 prgetattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr) 2695 { 2696 prnode_t *pnp = VTOP(vp); 2697 prnodetype_t type = pnp->pr_type; 2698 prcommon_t *pcp; 2699 proc_t *p; 2700 struct as *as; 2701 int error; 2702 vnode_t *rvp; 2703 timestruc_t now; 2704 extern uint_t nproc; 2705 int ngroups; 2706 2707 /* 2708 * This ugly bit of code allows us to keep both versions of this 2709 * function from the same source. 2710 */ 2711 #ifdef _LP64 2712 int iam32bit = (curproc->p_model == DATAMODEL_ILP32); 2713 #define PR_OBJSIZE(obj32, obj64) \ 2714 (iam32bit ? sizeof (obj32) : sizeof (obj64)) 2715 #define PR_OBJSPAN(obj32, obj64) \ 2716 (iam32bit ? LSPAN32(obj32) : LSPAN(obj64)) 2717 #else 2718 #define PR_OBJSIZE(obj32, obj64) \ 2719 (sizeof (obj64)) 2720 #define PR_OBJSPAN(obj32, obj64) \ 2721 (LSPAN(obj64)) 2722 #endif 2723 2724 /* 2725 * Return all the attributes. Should be refined 2726 * so that it returns only those asked for. 2727 * Most of this is complete fakery anyway. 2728 */ 2729 2730 /* 2731 * For files in the /proc/<pid>/object directory, 2732 * return the attributes of the underlying object. 2733 * For files in the /proc/<pid>/fd directory, 2734 * return the attributes of the underlying file, but 2735 * make it look inaccessible if it is not a regular file. 2736 * Make directories look like symlinks. 2737 */ 2738 switch (type) { 2739 case PR_CURDIR: 2740 case PR_ROOTDIR: 2741 if (!(flags & ATTR_REAL)) 2742 break; 2743 /* restrict full knowledge of the attributes to owner or root */ 2744 if ((error = praccess(vp, 0, 0, cr)) != 0) 2745 return (error); 2746 /* FALLTHROUGH */ 2747 case PR_OBJECT: 2748 case PR_FD: 2749 rvp = pnp->pr_realvp; 2750 error = VOP_GETATTR(rvp, vap, flags, cr); 2751 if (error) 2752 return (error); 2753 if (type == PR_FD) { 2754 if (rvp->v_type != VREG && rvp->v_type != VDIR) 2755 vap->va_mode = 0; 2756 else 2757 vap->va_mode &= pnp->pr_mode; 2758 } 2759 if (type == PR_OBJECT) 2760 vap->va_mode &= 07555; 2761 if (rvp->v_type == VDIR && !(flags & ATTR_REAL)) { 2762 vap->va_type = VLNK; 2763 vap->va_size = 0; 2764 vap->va_nlink = 1; 2765 } 2766 return (0); 2767 default: 2768 break; 2769 } 2770 2771 bzero(vap, sizeof (*vap)); 2772 /* 2773 * Large Files: Internally proc now uses VPROC to indicate 2774 * a proc file. Since we have been returning VREG through 2775 * VOP_GETATTR() until now, we continue to do this so as 2776 * not to break apps depending on this return value. 2777 */ 2778 vap->va_type = (vp->v_type == VPROC) ? VREG : vp->v_type; 2779 vap->va_mode = pnp->pr_mode; 2780 vap->va_fsid = vp->v_vfsp->vfs_dev; 2781 vap->va_blksize = DEV_BSIZE; 2782 vap->va_rdev = 0; 2783 vap->va_seq = 0; 2784 2785 if (type == PR_PROCDIR) { 2786 vap->va_uid = 0; 2787 vap->va_gid = 0; 2788 vap->va_nlink = nproc + 2; 2789 vap->va_nodeid = (ino64_t)PRROOTINO; 2790 gethrestime(&now); 2791 vap->va_atime = vap->va_mtime = vap->va_ctime = now; 2792 vap->va_size = (v.v_proc + 2) * PRSDSIZE; 2793 vap->va_nblocks = btod(vap->va_size); 2794 return (0); 2795 } 2796 2797 /* 2798 * /proc/<pid>/self is a symbolic link, and has no prcommon member 2799 */ 2800 if (type == PR_SELF) { 2801 vap->va_uid = crgetruid(CRED()); 2802 vap->va_gid = crgetrgid(CRED()); 2803 vap->va_nodeid = (ino64_t)PR_SELF; 2804 gethrestime(&now); 2805 vap->va_atime = vap->va_mtime = vap->va_ctime = now; 2806 vap->va_nlink = 1; 2807 vap->va_type = VLNK; 2808 vap->va_size = 0; 2809 return (0); 2810 } 2811 2812 p = pr_p_lock(pnp); 2813 mutex_exit(&pr_pidlock); 2814 if (p == NULL) 2815 return (ENOENT); 2816 pcp = pnp->pr_common; 2817 2818 mutex_enter(&p->p_crlock); 2819 vap->va_uid = crgetruid(p->p_cred); 2820 vap->va_gid = crgetrgid(p->p_cred); 2821 mutex_exit(&p->p_crlock); 2822 2823 vap->va_nlink = 1; 2824 vap->va_nodeid = pnp->pr_ino? pnp->pr_ino : 2825 pmkino(pcp->prc_tslot, pcp->prc_slot, pnp->pr_type); 2826 if ((pcp->prc_flags & PRC_LWP) && pcp->prc_tslot != -1) { 2827 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = 2828 vap->va_ctime.tv_sec = 2829 p->p_lwpdir[pcp->prc_tslot].ld_entry->le_start; 2830 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = 2831 vap->va_ctime.tv_nsec = 0; 2832 } else { 2833 user_t *up = PTOU(p); 2834 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = 2835 vap->va_ctime.tv_sec = up->u_start.tv_sec; 2836 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = 2837 vap->va_ctime.tv_nsec = up->u_start.tv_nsec; 2838 } 2839 2840 switch (type) { 2841 case PR_PIDDIR: 2842 /* va_nlink: count 'lwp', 'object' and 'fd' directory links */ 2843 vap->va_nlink = 5; 2844 vap->va_size = sizeof (piddir); 2845 break; 2846 case PR_OBJECTDIR: 2847 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2848 vap->va_size = 2 * PRSDSIZE; 2849 else { 2850 mutex_exit(&p->p_lock); 2851 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 2852 if (as->a_updatedir) 2853 rebuild_objdir(as); 2854 vap->va_size = (as->a_sizedir + 2) * PRSDSIZE; 2855 AS_LOCK_EXIT(as, &as->a_lock); 2856 mutex_enter(&p->p_lock); 2857 } 2858 vap->va_nlink = 2; 2859 break; 2860 case PR_PATHDIR: 2861 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2862 vap->va_size = (P_FINFO(p)->fi_nfiles + 4) * PRSDSIZE; 2863 else { 2864 mutex_exit(&p->p_lock); 2865 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 2866 if (as->a_updatedir) 2867 rebuild_objdir(as); 2868 vap->va_size = (as->a_sizedir + 4 + 2869 P_FINFO(p)->fi_nfiles) * PRSDSIZE; 2870 AS_LOCK_EXIT(as, &as->a_lock); 2871 mutex_enter(&p->p_lock); 2872 } 2873 vap->va_nlink = 2; 2874 break; 2875 case PR_PATH: 2876 case PR_CURDIR: 2877 case PR_ROOTDIR: 2878 case PR_CT: 2879 vap->va_type = VLNK; 2880 vap->va_size = 0; 2881 break; 2882 case PR_FDDIR: 2883 vap->va_nlink = 2; 2884 vap->va_size = (P_FINFO(p)->fi_nfiles + 2) * PRSDSIZE; 2885 break; 2886 case PR_LWPDIR: 2887 /* 2888 * va_nlink: count each lwp as a directory link. 2889 * va_size: size of p_lwpdir + 2 2890 */ 2891 vap->va_nlink = p->p_lwpcnt + p->p_zombcnt + 2; 2892 vap->va_size = (p->p_lwpdir_sz + 2) * PRSDSIZE; 2893 break; 2894 case PR_LWPIDDIR: 2895 vap->va_nlink = 2; 2896 vap->va_size = sizeof (lwpiddir); 2897 break; 2898 case PR_CTDIR: 2899 vap->va_nlink = 2; 2900 vap->va_size = (avl_numnodes(&p->p_ct_held) + 2) * PRSDSIZE; 2901 break; 2902 case PR_TMPLDIR: 2903 vap->va_nlink = 2; 2904 vap->va_size = (ct_ntypes + 2) * PRSDSIZE; 2905 break; 2906 case PR_AS: 2907 case PR_PIDFILE: 2908 case PR_LWPIDFILE: 2909 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2910 vap->va_size = 0; 2911 else { 2912 mutex_exit(&p->p_lock); 2913 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 2914 vap->va_size = rm_assize(as); 2915 AS_LOCK_EXIT(as, &as->a_lock); 2916 mutex_enter(&p->p_lock); 2917 } 2918 break; 2919 case PR_STATUS: 2920 vap->va_size = PR_OBJSIZE(pstatus32_t, pstatus_t); 2921 break; 2922 case PR_LSTATUS: 2923 vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + 2924 p->p_lwpcnt * PR_OBJSPAN(lwpstatus32_t, lwpstatus_t); 2925 break; 2926 case PR_PSINFO: 2927 vap->va_size = PR_OBJSIZE(psinfo32_t, psinfo_t); 2928 break; 2929 case PR_LPSINFO: 2930 vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + 2931 (p->p_lwpcnt + p->p_zombcnt) * 2932 PR_OBJSPAN(lwpsinfo32_t, lwpsinfo_t); 2933 break; 2934 case PR_MAP: 2935 case PR_RMAP: 2936 case PR_XMAP: 2937 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2938 vap->va_size = 0; 2939 else { 2940 mutex_exit(&p->p_lock); 2941 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 2942 if (type == PR_MAP) 2943 vap->va_mtime = as->a_updatetime; 2944 if (type == PR_XMAP) 2945 vap->va_size = prnsegs(as, 0) * 2946 PR_OBJSIZE(prxmap32_t, prxmap_t); 2947 else 2948 vap->va_size = prnsegs(as, type == PR_RMAP) * 2949 PR_OBJSIZE(prmap32_t, prmap_t); 2950 AS_LOCK_EXIT(as, &as->a_lock); 2951 mutex_enter(&p->p_lock); 2952 } 2953 break; 2954 case PR_CRED: 2955 mutex_enter(&p->p_crlock); 2956 vap->va_size = sizeof (prcred_t); 2957 ngroups = crgetngroups(p->p_cred); 2958 if (ngroups > 1) 2959 vap->va_size += (ngroups - 1) * sizeof (gid_t); 2960 mutex_exit(&p->p_crlock); 2961 break; 2962 case PR_PRIV: 2963 vap->va_size = prgetprivsize(); 2964 break; 2965 case PR_SIGACT: 2966 vap->va_size = (NSIG-1) * 2967 PR_OBJSIZE(struct sigaction32, struct sigaction); 2968 break; 2969 case PR_AUXV: 2970 vap->va_size = __KERN_NAUXV_IMPL * PR_OBJSIZE(auxv32_t, auxv_t); 2971 break; 2972 #if defined(__x86) 2973 case PR_LDT: 2974 mutex_enter(&p->p_ldtlock); 2975 vap->va_size = prnldt(p) * sizeof (struct ssd); 2976 mutex_exit(&p->p_ldtlock); 2977 break; 2978 #endif 2979 case PR_USAGE: 2980 vap->va_size = PR_OBJSIZE(prusage32_t, prusage_t); 2981 break; 2982 case PR_LUSAGE: 2983 vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + 2984 (p->p_lwpcnt + 1) * PR_OBJSPAN(prusage32_t, prusage_t); 2985 break; 2986 case PR_PAGEDATA: 2987 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2988 vap->va_size = 0; 2989 else { 2990 /* 2991 * We can drop p->p_lock before grabbing the 2992 * address space lock because p->p_as will not 2993 * change while the process is marked P_PR_LOCK. 2994 */ 2995 mutex_exit(&p->p_lock); 2996 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 2997 #ifdef _LP64 2998 vap->va_size = iam32bit? 2999 prpdsize32(as) : prpdsize(as); 3000 #else 3001 vap->va_size = prpdsize(as); 3002 #endif 3003 AS_LOCK_EXIT(as, &as->a_lock); 3004 mutex_enter(&p->p_lock); 3005 } 3006 break; 3007 case PR_OPAGEDATA: 3008 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 3009 vap->va_size = 0; 3010 else { 3011 mutex_exit(&p->p_lock); 3012 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 3013 #ifdef _LP64 3014 vap->va_size = iam32bit? 3015 oprpdsize32(as) : oprpdsize(as); 3016 #else 3017 vap->va_size = oprpdsize(as); 3018 #endif 3019 AS_LOCK_EXIT(as, &as->a_lock); 3020 mutex_enter(&p->p_lock); 3021 } 3022 break; 3023 case PR_WATCH: 3024 vap->va_size = avl_numnodes(&p->p_warea) * 3025 PR_OBJSIZE(prwatch32_t, prwatch_t); 3026 break; 3027 case PR_LWPSTATUS: 3028 vap->va_size = PR_OBJSIZE(lwpstatus32_t, lwpstatus_t); 3029 break; 3030 case PR_LWPSINFO: 3031 vap->va_size = PR_OBJSIZE(lwpsinfo32_t, lwpsinfo_t); 3032 break; 3033 case PR_LWPUSAGE: 3034 vap->va_size = PR_OBJSIZE(prusage32_t, prusage_t); 3035 break; 3036 case PR_XREGS: 3037 if (prhasx(p)) 3038 vap->va_size = prgetprxregsize(p); 3039 else 3040 vap->va_size = 0; 3041 break; 3042 #if defined(__sparc) 3043 case PR_GWINDOWS: 3044 { 3045 kthread_t *t; 3046 int n; 3047 3048 /* 3049 * If there is no lwp then just make the size zero. 3050 * This can happen if the lwp exits between the VOP_LOOKUP() 3051 * of the /proc/<pid>/lwp/<lwpid>/gwindows file and the 3052 * VOP_GETATTR() of the resulting vnode. 3053 */ 3054 if ((t = pcp->prc_thread) == NULL) { 3055 vap->va_size = 0; 3056 break; 3057 } 3058 /* 3059 * Drop p->p_lock while touching the stack. 3060 * The P_PR_LOCK flag prevents the lwp from 3061 * disappearing while we do this. 3062 */ 3063 mutex_exit(&p->p_lock); 3064 if ((n = prnwindows(ttolwp(t))) == 0) 3065 vap->va_size = 0; 3066 else 3067 vap->va_size = PR_OBJSIZE(gwindows32_t, gwindows_t) - 3068 (SPARC_MAXREGWINDOW - n) * 3069 PR_OBJSIZE(struct rwindow32, struct rwindow); 3070 mutex_enter(&p->p_lock); 3071 break; 3072 } 3073 case PR_ASRS: 3074 #ifdef _LP64 3075 if (p->p_model == DATAMODEL_LP64) 3076 vap->va_size = sizeof (asrset_t); 3077 else 3078 #endif 3079 vap->va_size = 0; 3080 break; 3081 #endif 3082 case PR_CTL: 3083 case PR_LWPCTL: 3084 default: 3085 vap->va_size = 0; 3086 break; 3087 } 3088 3089 prunlock(pnp); 3090 vap->va_nblocks = (fsblkcnt64_t)btod(vap->va_size); 3091 return (0); 3092 } 3093 3094 static int 3095 praccess(vnode_t *vp, int mode, int flags, cred_t *cr) 3096 { 3097 prnode_t *pnp = VTOP(vp); 3098 prnodetype_t type = pnp->pr_type; 3099 int vmode; 3100 vtype_t vtype; 3101 proc_t *p; 3102 int error = 0; 3103 vnode_t *rvp; 3104 vnode_t *xvp; 3105 3106 if ((mode & VWRITE) && vn_is_readonly(vp)) 3107 return (EROFS); 3108 3109 switch (type) { 3110 case PR_PROCDIR: 3111 break; 3112 3113 case PR_OBJECT: 3114 case PR_FD: 3115 /* 3116 * Disallow write access to the underlying objects. 3117 * Disallow access to underlying non-regular-file fds. 3118 * Disallow access to fds with other than existing open modes. 3119 */ 3120 rvp = pnp->pr_realvp; 3121 vtype = rvp->v_type; 3122 vmode = pnp->pr_mode; 3123 if ((type == PR_OBJECT && (mode & VWRITE)) || 3124 (type == PR_FD && vtype != VREG && vtype != VDIR) || 3125 (type == PR_FD && (vmode & mode) != mode && 3126 secpolicy_proc_access(cr) != 0)) 3127 return (EACCES); 3128 return (VOP_ACCESS(rvp, mode, flags, cr)); 3129 3130 case PR_PSINFO: /* these files can be read by anyone */ 3131 case PR_LPSINFO: 3132 case PR_LWPSINFO: 3133 case PR_LWPDIR: 3134 case PR_LWPIDDIR: 3135 case PR_USAGE: 3136 case PR_LUSAGE: 3137 case PR_LWPUSAGE: 3138 p = pr_p_lock(pnp); 3139 mutex_exit(&pr_pidlock); 3140 if (p == NULL) 3141 return (ENOENT); 3142 prunlock(pnp); 3143 break; 3144 3145 default: 3146 /* 3147 * Except for the world-readable files above, 3148 * only /proc/pid exists if the process is a zombie. 3149 */ 3150 if ((error = prlock(pnp, 3151 (type == PR_PIDDIR)? ZYES : ZNO)) != 0) 3152 return (error); 3153 p = pnp->pr_common->prc_proc; 3154 if (p != curproc) 3155 error = priv_proc_cred_perm(cr, p, NULL, mode); 3156 3157 if (error != 0 || p == curproc || (p->p_flag & SSYS) || 3158 p->p_as == &kas || (xvp = p->p_exec) == NULL || 3159 secpolicy_proc_access(cr) == 0) { 3160 prunlock(pnp); 3161 } else { 3162 /* 3163 * Determine if the process's executable is readable. 3164 * We have to drop p->p_lock before the VOP operation. 3165 */ 3166 VN_HOLD(xvp); 3167 prunlock(pnp); 3168 error = VOP_ACCESS(xvp, VREAD, 0, cr); 3169 VN_RELE(xvp); 3170 } 3171 if (error) 3172 return (error); 3173 break; 3174 } 3175 3176 if (type == PR_CURDIR || type == PR_ROOTDIR) { 3177 /* 3178 * Final access check on the underlying directory vnode. 3179 */ 3180 return (VOP_ACCESS(pnp->pr_realvp, mode, flags, cr)); 3181 } 3182 3183 /* 3184 * Visceral revulsion: For compatibility with old /proc, 3185 * allow the /proc/<pid> directory to be opened for writing. 3186 */ 3187 vmode = pnp->pr_mode; 3188 if (type == PR_PIDDIR) 3189 vmode |= VWRITE; 3190 if ((vmode & mode) != mode) 3191 error = secpolicy_proc_access(cr); 3192 return (error); 3193 } 3194 3195 /* 3196 * Array of lookup functions, indexed by /proc file type. 3197 */ 3198 static vnode_t *pr_lookup_notdir(), *pr_lookup_procdir(), *pr_lookup_piddir(), 3199 *pr_lookup_objectdir(), *pr_lookup_lwpdir(), *pr_lookup_lwpiddir(), 3200 *pr_lookup_fddir(), *pr_lookup_pathdir(), *pr_lookup_tmpldir(), 3201 *pr_lookup_ctdir(); 3202 3203 static vnode_t *(*pr_lookup_function[PR_NFILES])() = { 3204 pr_lookup_procdir, /* /proc */ 3205 pr_lookup_notdir, /* /proc/self */ 3206 pr_lookup_piddir, /* /proc/<pid> */ 3207 pr_lookup_notdir, /* /proc/<pid>/as */ 3208 pr_lookup_notdir, /* /proc/<pid>/ctl */ 3209 pr_lookup_notdir, /* /proc/<pid>/status */ 3210 pr_lookup_notdir, /* /proc/<pid>/lstatus */ 3211 pr_lookup_notdir, /* /proc/<pid>/psinfo */ 3212 pr_lookup_notdir, /* /proc/<pid>/lpsinfo */ 3213 pr_lookup_notdir, /* /proc/<pid>/map */ 3214 pr_lookup_notdir, /* /proc/<pid>/rmap */ 3215 pr_lookup_notdir, /* /proc/<pid>/xmap */ 3216 pr_lookup_notdir, /* /proc/<pid>/cred */ 3217 pr_lookup_notdir, /* /proc/<pid>/sigact */ 3218 pr_lookup_notdir, /* /proc/<pid>/auxv */ 3219 #if defined(__x86) 3220 pr_lookup_notdir, /* /proc/<pid>/ldt */ 3221 #endif 3222 pr_lookup_notdir, /* /proc/<pid>/usage */ 3223 pr_lookup_notdir, /* /proc/<pid>/lusage */ 3224 pr_lookup_notdir, /* /proc/<pid>/pagedata */ 3225 pr_lookup_notdir, /* /proc/<pid>/watch */ 3226 pr_lookup_notdir, /* /proc/<pid>/cwd */ 3227 pr_lookup_notdir, /* /proc/<pid>/root */ 3228 pr_lookup_fddir, /* /proc/<pid>/fd */ 3229 pr_lookup_notdir, /* /proc/<pid>/fd/nn */ 3230 pr_lookup_objectdir, /* /proc/<pid>/object */ 3231 pr_lookup_notdir, /* /proc/<pid>/object/xxx */ 3232 pr_lookup_lwpdir, /* /proc/<pid>/lwp */ 3233 pr_lookup_lwpiddir, /* /proc/<pid>/lwp/<lwpid> */ 3234 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 3235 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 3236 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpsinfo */ 3237 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpusage */ 3238 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/xregs */ 3239 pr_lookup_tmpldir, /* /proc/<pid>/lwp/<lwpid>/templates */ 3240 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/templates/<id> */ 3241 #if defined(__sparc) 3242 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/gwindows */ 3243 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/asrs */ 3244 #endif 3245 pr_lookup_notdir, /* /proc/<pid>/priv */ 3246 pr_lookup_pathdir, /* /proc/<pid>/path */ 3247 pr_lookup_notdir, /* /proc/<pid>/path/xxx */ 3248 pr_lookup_ctdir, /* /proc/<pid>/contracts */ 3249 pr_lookup_notdir, /* /proc/<pid>/contracts/<ctid> */ 3250 pr_lookup_notdir, /* old process file */ 3251 pr_lookup_notdir, /* old lwp file */ 3252 pr_lookup_notdir, /* old pagedata file */ 3253 }; 3254 3255 static int 3256 prlookup(vnode_t *dp, char *comp, vnode_t **vpp, pathname_t *pathp, 3257 int flags, vnode_t *rdir, cred_t *cr) 3258 { 3259 prnode_t *pnp = VTOP(dp); 3260 prnodetype_t type = pnp->pr_type; 3261 int error; 3262 3263 ASSERT(dp->v_type == VDIR); 3264 ASSERT(type < PR_NFILES); 3265 3266 if (type != PR_PROCDIR && strcmp(comp, "..") == 0) { 3267 VN_HOLD(pnp->pr_parent); 3268 *vpp = pnp->pr_parent; 3269 return (0); 3270 } 3271 3272 if (*comp == '\0' || 3273 strcmp(comp, ".") == 0 || strcmp(comp, "..") == 0) { 3274 VN_HOLD(dp); 3275 *vpp = dp; 3276 return (0); 3277 } 3278 3279 switch (type) { 3280 case PR_CURDIR: 3281 case PR_ROOTDIR: 3282 /* restrict lookup permission to owner or root */ 3283 if ((error = praccess(dp, VEXEC, 0, cr)) != 0) 3284 return (error); 3285 /* FALLTHROUGH */ 3286 case PR_FD: 3287 dp = pnp->pr_realvp; 3288 return (VOP_LOOKUP(dp, comp, vpp, pathp, flags, rdir, cr)); 3289 default: 3290 break; 3291 } 3292 3293 if ((type == PR_OBJECTDIR || type == PR_FDDIR || type == PR_PATHDIR) && 3294 (error = praccess(dp, VEXEC, 0, cr)) != 0) 3295 return (error); 3296 3297 *vpp = (pr_lookup_function[type](dp, comp)); 3298 3299 return ((*vpp == NULL) ? ENOENT : 0); 3300 } 3301 3302 /* ARGSUSED */ 3303 static int 3304 prcreate(vnode_t *dp, char *comp, vattr_t *vap, vcexcl_t excl, 3305 int mode, vnode_t **vpp, cred_t *cr, int flag) 3306 { 3307 int error; 3308 3309 if ((error = prlookup(dp, comp, vpp, NULL, 0, NULL, cr)) != 0) { 3310 if (error == ENOENT) /* can't O_CREAT nonexistent files */ 3311 error = EACCES; /* unwriteable directories */ 3312 } else { 3313 if (excl == EXCL) /* O_EXCL */ 3314 error = EEXIST; 3315 else if (vap->va_mask & AT_SIZE) { /* O_TRUNC */ 3316 vnode_t *vp = *vpp; 3317 uint_t mask; 3318 3319 if (vp->v_type == VDIR) 3320 error = EISDIR; 3321 else if (vp->v_type != VPROC || 3322 VTOP(vp)->pr_type != PR_FD) 3323 error = EACCES; 3324 else { /* /proc/<pid>/fd/<n> */ 3325 vp = VTOP(vp)->pr_realvp; 3326 mask = vap->va_mask; 3327 vap->va_mask = AT_SIZE; 3328 error = VOP_SETATTR(vp, vap, 0, cr, NULL); 3329 vap->va_mask = mask; 3330 } 3331 } 3332 if (error) { 3333 VN_RELE(*vpp); 3334 *vpp = NULL; 3335 } 3336 } 3337 return (error); 3338 } 3339 3340 /* ARGSUSED */ 3341 static vnode_t * 3342 pr_lookup_notdir(vnode_t *dp, char *comp) 3343 { 3344 return (NULL); 3345 } 3346 3347 /* 3348 * Find or construct a process vnode for the given pid. 3349 */ 3350 static vnode_t * 3351 pr_lookup_procdir(vnode_t *dp, char *comp) 3352 { 3353 pid_t pid; 3354 prnode_t *pnp; 3355 prcommon_t *pcp; 3356 vnode_t *vp; 3357 proc_t *p; 3358 int c; 3359 3360 ASSERT(VTOP(dp)->pr_type == PR_PROCDIR); 3361 3362 if (strcmp(comp, "self") == 0) { 3363 pnp = prgetnode(dp, PR_SELF); 3364 return (PTOV(pnp)); 3365 } else { 3366 pid = 0; 3367 while ((c = *comp++) != '\0') { 3368 if (c < '0' || c > '9') 3369 return (NULL); 3370 pid = 10*pid + c - '0'; 3371 if (pid > maxpid) 3372 return (NULL); 3373 } 3374 } 3375 3376 pnp = prgetnode(dp, PR_PIDDIR); 3377 3378 mutex_enter(&pidlock); 3379 if ((p = prfind(pid)) == NULL || p->p_stat == SIDL) { 3380 mutex_exit(&pidlock); 3381 prfreenode(pnp); 3382 return (NULL); 3383 } 3384 ASSERT(p->p_stat != 0); 3385 mutex_enter(&p->p_lock); 3386 mutex_exit(&pidlock); 3387 3388 if (secpolicy_basic_procinfo(CRED(), p, curproc) != 0) { 3389 mutex_exit(&p->p_lock); 3390 prfreenode(pnp); 3391 return (NULL); 3392 } 3393 3394 /* 3395 * If a process vnode already exists and it is not invalid 3396 * and it was created by the current process and it belongs 3397 * to the same /proc mount point as our parent vnode, then 3398 * just use it and discard the newly-allocated prnode. 3399 */ 3400 for (vp = p->p_trace; vp != NULL; vp = VTOP(vp)->pr_next) { 3401 if (!(VTOP(VTOP(vp)->pr_pidfile)->pr_flags & PR_INVAL) && 3402 VTOP(vp)->pr_owner == curproc && 3403 vp->v_vfsp == dp->v_vfsp) { 3404 ASSERT(!(VTOP(vp)->pr_flags & PR_INVAL)); 3405 VN_HOLD(vp); 3406 prfreenode(pnp); 3407 mutex_exit(&p->p_lock); 3408 return (vp); 3409 } 3410 } 3411 pnp->pr_owner = curproc; 3412 3413 /* 3414 * prgetnode() initialized most of the prnode. 3415 * Finish the job. 3416 */ 3417 pcp = pnp->pr_common; /* the newly-allocated prcommon struct */ 3418 if ((vp = p->p_trace) != NULL) { 3419 /* discard the new prcommon and use the existing prcommon */ 3420 prfreecommon(pcp); 3421 pcp = VTOP(vp)->pr_common; 3422 mutex_enter(&pcp->prc_mutex); 3423 ASSERT(pcp->prc_refcnt > 0); 3424 pcp->prc_refcnt++; 3425 mutex_exit(&pcp->prc_mutex); 3426 pnp->pr_common = pcp; 3427 } else { 3428 /* initialize the new prcommon struct */ 3429 if ((p->p_flag & SSYS) || p->p_as == &kas) 3430 pcp->prc_flags |= PRC_SYS; 3431 if (p->p_stat == SZOMB) 3432 pcp->prc_flags |= PRC_DESTROY; 3433 pcp->prc_proc = p; 3434 pcp->prc_datamodel = p->p_model; 3435 pcp->prc_pid = p->p_pid; 3436 pcp->prc_slot = p->p_slot; 3437 } 3438 pnp->pr_pcommon = pcp; 3439 pnp->pr_parent = dp; 3440 VN_HOLD(dp); 3441 /* 3442 * Link in the old, invalid directory vnode so we 3443 * can later determine the last close of the file. 3444 */ 3445 pnp->pr_next = p->p_trace; 3446 p->p_trace = dp = PTOV(pnp); 3447 3448 /* 3449 * Kludge for old /proc: initialize the PR_PIDFILE as well. 3450 */ 3451 vp = pnp->pr_pidfile; 3452 pnp = VTOP(vp); 3453 pnp->pr_ino = ptoi(pcp->prc_pid); 3454 pnp->pr_common = pcp; 3455 pnp->pr_pcommon = pcp; 3456 pnp->pr_parent = dp; 3457 pnp->pr_next = p->p_plist; 3458 p->p_plist = vp; 3459 3460 mutex_exit(&p->p_lock); 3461 return (dp); 3462 } 3463 3464 static vnode_t * 3465 pr_lookup_piddir(vnode_t *dp, char *comp) 3466 { 3467 prnode_t *dpnp = VTOP(dp); 3468 vnode_t *vp; 3469 prnode_t *pnp; 3470 proc_t *p; 3471 user_t *up; 3472 prdirent_t *dirp; 3473 int i; 3474 enum prnodetype type; 3475 3476 ASSERT(dpnp->pr_type == PR_PIDDIR); 3477 3478 for (i = 0; i < NPIDDIRFILES; i++) { 3479 /* Skip "." and ".." */ 3480 dirp = &piddir[i+2]; 3481 if (strcmp(comp, dirp->d_name) == 0) 3482 break; 3483 } 3484 3485 if (i >= NPIDDIRFILES) 3486 return (NULL); 3487 3488 type = (int)dirp->d_ino; 3489 pnp = prgetnode(dp, type); 3490 3491 p = pr_p_lock(dpnp); 3492 mutex_exit(&pr_pidlock); 3493 if (p == NULL) { 3494 prfreenode(pnp); 3495 return (NULL); 3496 } 3497 if (dpnp->pr_pcommon->prc_flags & PRC_DESTROY) { 3498 switch (type) { 3499 case PR_PSINFO: 3500 case PR_USAGE: 3501 break; 3502 default: 3503 prunlock(dpnp); 3504 prfreenode(pnp); 3505 return (NULL); 3506 } 3507 } 3508 3509 switch (type) { 3510 case PR_CURDIR: 3511 case PR_ROOTDIR: 3512 up = PTOU(p); 3513 vp = (type == PR_CURDIR)? up->u_cdir : 3514 (up->u_rdir? up->u_rdir : rootdir); 3515 3516 if (vp == NULL) { /* can't happen? */ 3517 prunlock(dpnp); 3518 prfreenode(pnp); 3519 return (NULL); 3520 } 3521 /* 3522 * Fill in the prnode so future references will 3523 * be able to find the underlying object's vnode. 3524 */ 3525 VN_HOLD(vp); 3526 pnp->pr_realvp = vp; 3527 break; 3528 default: 3529 break; 3530 } 3531 3532 mutex_enter(&dpnp->pr_mutex); 3533 3534 if ((vp = dpnp->pr_files[i]) != NULL && 3535 !(VTOP(vp)->pr_flags & PR_INVAL)) { 3536 VN_HOLD(vp); 3537 mutex_exit(&dpnp->pr_mutex); 3538 prunlock(dpnp); 3539 prfreenode(pnp); 3540 return (vp); 3541 } 3542 3543 /* 3544 * prgetnode() initialized most of the prnode. 3545 * Finish the job. 3546 */ 3547 pnp->pr_common = dpnp->pr_common; 3548 pnp->pr_pcommon = dpnp->pr_pcommon; 3549 pnp->pr_parent = dp; 3550 VN_HOLD(dp); 3551 pnp->pr_index = i; 3552 3553 dpnp->pr_files[i] = vp = PTOV(pnp); 3554 3555 /* 3556 * Link new vnode into list of all /proc vnodes for the process. 3557 */ 3558 if (vp->v_type == VPROC) { 3559 pnp->pr_next = p->p_plist; 3560 p->p_plist = vp; 3561 } 3562 mutex_exit(&dpnp->pr_mutex); 3563 prunlock(dpnp); 3564 return (vp); 3565 } 3566 3567 static vnode_t * 3568 pr_lookup_objectdir(vnode_t *dp, char *comp) 3569 { 3570 prnode_t *dpnp = VTOP(dp); 3571 prnode_t *pnp; 3572 proc_t *p; 3573 struct seg *seg; 3574 struct as *as; 3575 vnode_t *vp; 3576 vattr_t vattr; 3577 3578 ASSERT(dpnp->pr_type == PR_OBJECTDIR); 3579 3580 pnp = prgetnode(dp, PR_OBJECT); 3581 3582 if (prlock(dpnp, ZNO) != 0) { 3583 prfreenode(pnp); 3584 return (NULL); 3585 } 3586 p = dpnp->pr_common->prc_proc; 3587 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 3588 prunlock(dpnp); 3589 prfreenode(pnp); 3590 return (NULL); 3591 } 3592 3593 /* 3594 * We drop p_lock before grabbing the address space lock 3595 * in order to avoid a deadlock with the clock thread. 3596 * The process will not disappear and its address space 3597 * will not change because it is marked P_PR_LOCK. 3598 */ 3599 mutex_exit(&p->p_lock); 3600 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 3601 if ((seg = AS_SEGFIRST(as)) == NULL) { 3602 vp = NULL; 3603 goto out; 3604 } 3605 if (strcmp(comp, "a.out") == 0) { 3606 vp = p->p_exec; 3607 goto out; 3608 } 3609 do { 3610 /* 3611 * Manufacture a filename for the "object" directory. 3612 */ 3613 vattr.va_mask = AT_FSID|AT_NODEID; 3614 if (seg->s_ops == &segvn_ops && 3615 SEGOP_GETVP(seg, seg->s_base, &vp) == 0 && 3616 vp != NULL && vp->v_type == VREG && 3617 VOP_GETATTR(vp, &vattr, 0, CRED()) == 0) { 3618 char name[64]; 3619 3620 if (vp == p->p_exec) /* "a.out" */ 3621 continue; 3622 pr_object_name(name, vp, &vattr); 3623 if (strcmp(name, comp) == 0) 3624 goto out; 3625 } 3626 } while ((seg = AS_SEGNEXT(as, seg)) != NULL); 3627 3628 vp = NULL; 3629 out: 3630 if (vp != NULL) { 3631 VN_HOLD(vp); 3632 } 3633 AS_LOCK_EXIT(as, &as->a_lock); 3634 mutex_enter(&p->p_lock); 3635 prunlock(dpnp); 3636 3637 if (vp == NULL) 3638 prfreenode(pnp); 3639 else { 3640 /* 3641 * Fill in the prnode so future references will 3642 * be able to find the underlying object's vnode. 3643 * Don't link this prnode into the list of all 3644 * prnodes for the process; this is a one-use node. 3645 * Its use is entirely to catch and fail opens for writing. 3646 */ 3647 pnp->pr_realvp = vp; 3648 vp = PTOV(pnp); 3649 } 3650 3651 return (vp); 3652 } 3653 3654 /* 3655 * Find or construct an lwp vnode for the given lwpid. 3656 */ 3657 static vnode_t * 3658 pr_lookup_lwpdir(vnode_t *dp, char *comp) 3659 { 3660 id_t tid; /* same type as t->t_tid */ 3661 int want_agent; 3662 prnode_t *dpnp = VTOP(dp); 3663 prnode_t *pnp; 3664 prcommon_t *pcp; 3665 vnode_t *vp; 3666 proc_t *p; 3667 kthread_t *t; 3668 lwpdir_t *ldp; 3669 lwpent_t *lep; 3670 int tslot; 3671 int c; 3672 3673 ASSERT(dpnp->pr_type == PR_LWPDIR); 3674 3675 tid = 0; 3676 if (strcmp(comp, "agent") == 0) 3677 want_agent = 1; 3678 else { 3679 want_agent = 0; 3680 while ((c = *comp++) != '\0') { 3681 id_t otid; 3682 3683 if (c < '0' || c > '9') 3684 return (NULL); 3685 otid = tid; 3686 tid = 10*tid + c - '0'; 3687 if (tid/10 != otid) /* integer overflow */ 3688 return (NULL); 3689 } 3690 } 3691 3692 pnp = prgetnode(dp, PR_LWPIDDIR); 3693 3694 p = pr_p_lock(dpnp); 3695 mutex_exit(&pr_pidlock); 3696 if (p == NULL) { 3697 prfreenode(pnp); 3698 return (NULL); 3699 } 3700 3701 if (want_agent) { 3702 if ((t = p->p_agenttp) == NULL) 3703 lep = NULL; 3704 else { 3705 tid = t->t_tid; 3706 tslot = t->t_dslot; 3707 lep = p->p_lwpdir[tslot].ld_entry; 3708 } 3709 } else { 3710 if ((ldp = lwp_hash_lookup(p, tid)) == NULL) 3711 lep = NULL; 3712 else { 3713 tslot = (int)(ldp - p->p_lwpdir); 3714 lep = ldp->ld_entry; 3715 } 3716 } 3717 3718 if (lep == NULL) { 3719 prunlock(dpnp); 3720 prfreenode(pnp); 3721 return (NULL); 3722 } 3723 3724 /* 3725 * If an lwp vnode already exists and it is not invalid 3726 * and it was created by the current process and it belongs 3727 * to the same /proc mount point as our parent vnode, then 3728 * just use it and discard the newly-allocated prnode. 3729 */ 3730 for (vp = lep->le_trace; vp != NULL; vp = VTOP(vp)->pr_next) { 3731 if (!(VTOP(vp)->pr_flags & PR_INVAL) && 3732 VTOP(vp)->pr_owner == curproc && 3733 vp->v_vfsp == dp->v_vfsp) { 3734 VN_HOLD(vp); 3735 prunlock(dpnp); 3736 prfreenode(pnp); 3737 return (vp); 3738 } 3739 } 3740 pnp->pr_owner = curproc; 3741 3742 /* 3743 * prgetnode() initialized most of the prnode. 3744 * Finish the job. 3745 */ 3746 pcp = pnp->pr_common; /* the newly-allocated prcommon struct */ 3747 if ((vp = lep->le_trace) != NULL) { 3748 /* discard the new prcommon and use the existing prcommon */ 3749 prfreecommon(pcp); 3750 pcp = VTOP(vp)->pr_common; 3751 mutex_enter(&pcp->prc_mutex); 3752 ASSERT(pcp->prc_refcnt > 0); 3753 pcp->prc_refcnt++; 3754 mutex_exit(&pcp->prc_mutex); 3755 pnp->pr_common = pcp; 3756 } else { 3757 /* initialize the new prcommon struct */ 3758 pcp->prc_flags |= PRC_LWP; 3759 if ((p->p_flag & SSYS) || p->p_as == &kas) 3760 pcp->prc_flags |= PRC_SYS; 3761 if ((t = lep->le_thread) == NULL) 3762 pcp->prc_flags |= PRC_DESTROY; 3763 pcp->prc_proc = p; 3764 pcp->prc_datamodel = dpnp->pr_pcommon->prc_datamodel; 3765 pcp->prc_pid = p->p_pid; 3766 pcp->prc_slot = p->p_slot; 3767 pcp->prc_thread = t; 3768 pcp->prc_tid = tid; 3769 pcp->prc_tslot = tslot; 3770 } 3771 pnp->pr_pcommon = dpnp->pr_pcommon; 3772 pnp->pr_parent = dp; 3773 VN_HOLD(dp); 3774 /* 3775 * Link in the old, invalid directory vnode so we 3776 * can later determine the last close of the file. 3777 */ 3778 pnp->pr_next = lep->le_trace; 3779 lep->le_trace = vp = PTOV(pnp); 3780 prunlock(dpnp); 3781 return (vp); 3782 } 3783 3784 static vnode_t * 3785 pr_lookup_lwpiddir(vnode_t *dp, char *comp) 3786 { 3787 prnode_t *dpnp = VTOP(dp); 3788 vnode_t *vp; 3789 prnode_t *pnp; 3790 proc_t *p; 3791 prdirent_t *dirp; 3792 int i; 3793 enum prnodetype type; 3794 3795 ASSERT(dpnp->pr_type == PR_LWPIDDIR); 3796 3797 for (i = 0; i < NLWPIDDIRFILES; i++) { 3798 /* Skip "." and ".." */ 3799 dirp = &lwpiddir[i+2]; 3800 if (strcmp(comp, dirp->d_name) == 0) 3801 break; 3802 } 3803 3804 if (i >= NLWPIDDIRFILES) 3805 return (NULL); 3806 3807 type = (int)dirp->d_ino; 3808 pnp = prgetnode(dp, type); 3809 3810 p = pr_p_lock(dpnp); 3811 mutex_exit(&pr_pidlock); 3812 if (p == NULL) { 3813 prfreenode(pnp); 3814 return (NULL); 3815 } 3816 if (dpnp->pr_common->prc_flags & PRC_DESTROY) { 3817 /* 3818 * Only the lwpsinfo file is present for zombie lwps. 3819 * Nothing is present if the lwp has been reaped. 3820 */ 3821 if (dpnp->pr_common->prc_tslot == -1 || 3822 type != PR_LWPSINFO) { 3823 prunlock(dpnp); 3824 prfreenode(pnp); 3825 return (NULL); 3826 } 3827 } 3828 3829 #if defined(__sparc) 3830 /* the asrs file exists only for sparc v9 _LP64 processes */ 3831 if (type == PR_ASRS && p->p_model != DATAMODEL_LP64) { 3832 prunlock(dpnp); 3833 prfreenode(pnp); 3834 return (NULL); 3835 } 3836 #endif 3837 3838 mutex_enter(&dpnp->pr_mutex); 3839 3840 if ((vp = dpnp->pr_files[i]) != NULL && 3841 !(VTOP(vp)->pr_flags & PR_INVAL)) { 3842 VN_HOLD(vp); 3843 mutex_exit(&dpnp->pr_mutex); 3844 prunlock(dpnp); 3845 prfreenode(pnp); 3846 return (vp); 3847 } 3848 3849 /* 3850 * prgetnode() initialized most of the prnode. 3851 * Finish the job. 3852 */ 3853 pnp->pr_common = dpnp->pr_common; 3854 pnp->pr_pcommon = dpnp->pr_pcommon; 3855 pnp->pr_parent = dp; 3856 VN_HOLD(dp); 3857 pnp->pr_index = i; 3858 3859 dpnp->pr_files[i] = vp = PTOV(pnp); 3860 3861 /* 3862 * Link new vnode into list of all /proc vnodes for the process. 3863 */ 3864 if (vp->v_type == VPROC) { 3865 pnp->pr_next = p->p_plist; 3866 p->p_plist = vp; 3867 } 3868 mutex_exit(&dpnp->pr_mutex); 3869 prunlock(dpnp); 3870 return (vp); 3871 } 3872 3873 /* 3874 * Lookup one of the process's open files. 3875 */ 3876 static vnode_t * 3877 pr_lookup_fddir(vnode_t *dp, char *comp) 3878 { 3879 prnode_t *dpnp = VTOP(dp); 3880 prnode_t *pnp; 3881 vnode_t *vp = NULL; 3882 proc_t *p; 3883 file_t *fp; 3884 uint_t fd; 3885 int c; 3886 uf_entry_t *ufp; 3887 uf_info_t *fip; 3888 3889 ASSERT(dpnp->pr_type == PR_FDDIR); 3890 3891 fd = 0; 3892 while ((c = *comp++) != '\0') { 3893 int ofd; 3894 if (c < '0' || c > '9') 3895 return (NULL); 3896 ofd = fd; 3897 fd = 10*fd + c - '0'; 3898 if (fd/10 != ofd) /* integer overflow */ 3899 return (NULL); 3900 } 3901 3902 pnp = prgetnode(dp, PR_FD); 3903 3904 if (prlock(dpnp, ZNO) != 0) { 3905 prfreenode(pnp); 3906 return (NULL); 3907 } 3908 p = dpnp->pr_common->prc_proc; 3909 if ((p->p_flag & SSYS) || p->p_as == &kas) { 3910 prunlock(dpnp); 3911 prfreenode(pnp); 3912 return (NULL); 3913 } 3914 3915 fip = P_FINFO(p); 3916 mutex_exit(&p->p_lock); 3917 mutex_enter(&fip->fi_lock); 3918 if (fd < fip->fi_nfiles) { 3919 UF_ENTER(ufp, fip, fd); 3920 if ((fp = ufp->uf_file) != NULL) { 3921 pnp->pr_mode = 07111; 3922 if (fp->f_flag & FREAD) 3923 pnp->pr_mode |= 0444; 3924 if (fp->f_flag & FWRITE) 3925 pnp->pr_mode |= 0222; 3926 vp = fp->f_vnode; 3927 VN_HOLD(vp); 3928 } 3929 UF_EXIT(ufp); 3930 } 3931 mutex_exit(&fip->fi_lock); 3932 mutex_enter(&p->p_lock); 3933 prunlock(dpnp); 3934 3935 if (vp == NULL) 3936 prfreenode(pnp); 3937 else { 3938 /* 3939 * Fill in the prnode so future references will 3940 * be able to find the underlying object's vnode. 3941 * Don't link this prnode into the list of all 3942 * prnodes for the process; this is a one-use node. 3943 */ 3944 pnp->pr_realvp = vp; 3945 pnp->pr_parent = dp; /* needed for prlookup */ 3946 VN_HOLD(dp); 3947 vp = PTOV(pnp); 3948 if (pnp->pr_realvp->v_type == VDIR) 3949 vp->v_type = VDIR; 3950 } 3951 3952 return (vp); 3953 } 3954 3955 static vnode_t * 3956 pr_lookup_pathdir(vnode_t *dp, char *comp) 3957 { 3958 prnode_t *dpnp = VTOP(dp); 3959 prnode_t *pnp; 3960 vnode_t *vp = NULL; 3961 proc_t *p; 3962 uint_t fd, flags = 0; 3963 int c; 3964 uf_entry_t *ufp; 3965 uf_info_t *fip; 3966 enum { NAME_FD, NAME_OBJECT, NAME_ROOT, NAME_CWD, NAME_UNKNOWN } type; 3967 char *tmp; 3968 int idx; 3969 struct seg *seg; 3970 struct as *as = NULL; 3971 vattr_t vattr; 3972 3973 ASSERT(dpnp->pr_type == PR_PATHDIR); 3974 3975 /* 3976 * First, check if this is a numeric entry, in which case we have a 3977 * file descriptor. 3978 */ 3979 fd = 0; 3980 type = NAME_FD; 3981 tmp = comp; 3982 while ((c = *tmp++) != '\0') { 3983 int ofd; 3984 if (c < '0' || c > '9') { 3985 type = NAME_UNKNOWN; 3986 break; 3987 } 3988 ofd = fd; 3989 fd = 10*fd + c - '0'; 3990 if (fd/10 != ofd) { /* integer overflow */ 3991 type = NAME_UNKNOWN; 3992 break; 3993 } 3994 } 3995 3996 /* 3997 * Next, see if it is one of the special values {root, cwd}. 3998 */ 3999 if (type == NAME_UNKNOWN) { 4000 if (strcmp(comp, "root") == 0) 4001 type = NAME_ROOT; 4002 else if (strcmp(comp, "cwd") == 0) 4003 type = NAME_CWD; 4004 } 4005 4006 /* 4007 * Grab the necessary data from the process 4008 */ 4009 if (prlock(dpnp, ZNO) != 0) 4010 return (NULL); 4011 p = dpnp->pr_common->prc_proc; 4012 4013 fip = P_FINFO(p); 4014 4015 switch (type) { 4016 case NAME_ROOT: 4017 if ((vp = PTOU(p)->u_rdir) == NULL) 4018 vp = p->p_zone->zone_rootvp; 4019 VN_HOLD(vp); 4020 break; 4021 case NAME_CWD: 4022 vp = PTOU(p)->u_cdir; 4023 VN_HOLD(vp); 4024 break; 4025 default: 4026 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 4027 prunlock(dpnp); 4028 return (NULL); 4029 } 4030 } 4031 mutex_exit(&p->p_lock); 4032 4033 /* 4034 * Determine if this is an object entry 4035 */ 4036 if (type == NAME_UNKNOWN) { 4037 /* 4038 * Start with the inode index immediately after the number of 4039 * files. 4040 */ 4041 mutex_enter(&fip->fi_lock); 4042 idx = fip->fi_nfiles + 4; 4043 mutex_exit(&fip->fi_lock); 4044 4045 if (strcmp(comp, "a.out") == 0) { 4046 if (p->p_execdir != NULL) { 4047 vp = p->p_execdir; 4048 VN_HOLD(vp); 4049 type = NAME_OBJECT; 4050 flags |= PR_AOUT; 4051 } else { 4052 vp = p->p_exec; 4053 VN_HOLD(vp); 4054 type = NAME_OBJECT; 4055 } 4056 } else { 4057 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 4058 if ((seg = AS_SEGFIRST(as)) != NULL) { 4059 do { 4060 /* 4061 * Manufacture a filename for the 4062 * "object" directory. 4063 */ 4064 vattr.va_mask = AT_FSID|AT_NODEID; 4065 if (seg->s_ops == &segvn_ops && 4066 SEGOP_GETVP(seg, seg->s_base, &vp) 4067 == 0 && 4068 vp != NULL && vp->v_type == VREG && 4069 VOP_GETATTR(vp, &vattr, 0, CRED()) 4070 == 0) { 4071 char name[64]; 4072 4073 if (vp == p->p_exec) 4074 continue; 4075 idx++; 4076 pr_object_name(name, vp, 4077 &vattr); 4078 if (strcmp(name, comp) == 0) 4079 break; 4080 } 4081 } while ((seg = AS_SEGNEXT(as, seg)) != NULL); 4082 } 4083 4084 if (seg == NULL) { 4085 vp = NULL; 4086 } else { 4087 VN_HOLD(vp); 4088 type = NAME_OBJECT; 4089 } 4090 4091 AS_LOCK_EXIT(as, &as->a_lock); 4092 } 4093 } 4094 4095 4096 switch (type) { 4097 case NAME_FD: 4098 mutex_enter(&fip->fi_lock); 4099 if (fd < fip->fi_nfiles) { 4100 UF_ENTER(ufp, fip, fd); 4101 if (ufp->uf_file != NULL) { 4102 vp = ufp->uf_file->f_vnode; 4103 VN_HOLD(vp); 4104 } 4105 UF_EXIT(ufp); 4106 } 4107 mutex_exit(&fip->fi_lock); 4108 idx = fd + 4; 4109 break; 4110 case NAME_ROOT: 4111 idx = 2; 4112 break; 4113 case NAME_CWD: 4114 idx = 3; 4115 break; 4116 case NAME_OBJECT: 4117 case NAME_UNKNOWN: 4118 /* Nothing to do */ 4119 break; 4120 } 4121 4122 mutex_enter(&p->p_lock); 4123 prunlock(dpnp); 4124 4125 if (vp != NULL) { 4126 pnp = prgetnode(dp, PR_PATH); 4127 4128 pnp->pr_flags |= flags; 4129 pnp->pr_common = dpnp->pr_common; 4130 pnp->pr_pcommon = dpnp->pr_pcommon; 4131 pnp->pr_realvp = vp; 4132 pnp->pr_parent = dp; /* needed for prlookup */ 4133 pnp->pr_ino = pmkino(idx, dpnp->pr_common->prc_slot, PR_PATH); 4134 VN_HOLD(dp); 4135 vp = PTOV(pnp); 4136 vp->v_type = VLNK; 4137 } 4138 4139 return (vp); 4140 } 4141 4142 /* 4143 * Look up one of the process's active templates. 4144 */ 4145 static vnode_t * 4146 pr_lookup_tmpldir(vnode_t *dp, char *comp) 4147 { 4148 prnode_t *dpnp = VTOP(dp); 4149 prnode_t *pnp; 4150 vnode_t *vp = NULL; 4151 proc_t *p; 4152 int i; 4153 4154 ASSERT(dpnp->pr_type == PR_TMPLDIR); 4155 4156 for (i = 0; i < ct_ntypes; i++) 4157 if (strcmp(comp, ct_types[i]->ct_type_name) == 0) 4158 break; 4159 if (i == ct_ntypes) 4160 return (NULL); 4161 4162 pnp = prgetnode(dp, PR_TMPL); 4163 4164 if (prlock(dpnp, ZNO) != 0) { 4165 prfreenode(pnp); 4166 return (NULL); 4167 } 4168 p = dpnp->pr_common->prc_proc; 4169 if ((p->p_flag & SSYS) || p->p_as == &kas || 4170 (dpnp->pr_common->prc_flags & (PRC_DESTROY | PRC_LWP)) != PRC_LWP) { 4171 prunlock(dpnp); 4172 prfreenode(pnp); 4173 return (NULL); 4174 } 4175 if (ttolwp(dpnp->pr_common->prc_thread)->lwp_ct_active[i] != NULL) { 4176 pnp->pr_common = dpnp->pr_common; 4177 pnp->pr_pcommon = dpnp->pr_pcommon; 4178 pnp->pr_parent = dp; 4179 pnp->pr_cttype = i; 4180 VN_HOLD(dp); 4181 vp = PTOV(pnp); 4182 } else { 4183 prfreenode(pnp); 4184 } 4185 prunlock(dpnp); 4186 4187 return (vp); 4188 } 4189 4190 /* 4191 * Look up one of the contracts owned by the process. 4192 */ 4193 static vnode_t * 4194 pr_lookup_ctdir(vnode_t *dp, char *comp) 4195 { 4196 prnode_t *dpnp = VTOP(dp); 4197 prnode_t *pnp; 4198 vnode_t *vp = NULL; 4199 proc_t *p; 4200 id_t id = 0; 4201 contract_t *ct; 4202 int c; 4203 4204 ASSERT(dpnp->pr_type == PR_CTDIR); 4205 4206 while ((c = *comp++) != '\0') { 4207 id_t oid; 4208 if (c < '0' || c > '9') 4209 return (NULL); 4210 oid = id; 4211 id = 10 * id + c - '0'; 4212 if (id / 10 != oid) /* integer overflow */ 4213 return (NULL); 4214 } 4215 4216 /* 4217 * Search all contracts; we'll filter below. 4218 */ 4219 ct = contract_ptr(id, GLOBAL_ZONEUNIQID); 4220 if (ct == NULL) 4221 return (NULL); 4222 4223 pnp = prgetnode(dp, PR_CT); 4224 4225 if (prlock(dpnp, ZNO) != 0) { 4226 prfreenode(pnp); 4227 contract_rele(ct); 4228 return (NULL); 4229 } 4230 p = dpnp->pr_common->prc_proc; 4231 /* 4232 * We only allow lookups of contracts owned by this process, or, 4233 * if we are zsched and this is a zone's procfs, contracts on 4234 * stuff in the zone which are held by processes or contracts 4235 * outside the zone. (see logic in contract_status_common) 4236 */ 4237 if ((ct->ct_owner != p) && 4238 !(p == VTOZONE(dp)->zone_zsched && ct->ct_state < CTS_ORPHAN && 4239 VTOZONE(dp)->zone_uniqid == contract_getzuniqid(ct) && 4240 VTOZONE(dp)->zone_uniqid != GLOBAL_ZONEUNIQID && 4241 ct->ct_czuniqid == GLOBAL_ZONEUNIQID)) { 4242 prunlock(dpnp); 4243 prfreenode(pnp); 4244 contract_rele(ct); 4245 return (NULL); 4246 } 4247 pnp->pr_common = dpnp->pr_common; 4248 pnp->pr_pcommon = dpnp->pr_pcommon; 4249 pnp->pr_contract = ct; 4250 pnp->pr_parent = dp; 4251 pnp->pr_ino = pmkino(id, pnp->pr_common->prc_slot, PR_CT); 4252 VN_HOLD(dp); 4253 prunlock(dpnp); 4254 vp = PTOV(pnp); 4255 4256 return (vp); 4257 } 4258 4259 /* 4260 * Construct an lwp vnode for the old /proc interface. 4261 * We stand on our head to make the /proc plumbing correct. 4262 */ 4263 vnode_t * 4264 prlwpnode(prnode_t *pnp, uint_t tid) 4265 { 4266 char comp[12]; 4267 vnode_t *dp; 4268 vnode_t *vp; 4269 prcommon_t *pcp; 4270 proc_t *p; 4271 4272 /* 4273 * Lookup the /proc/<pid>/lwp/<lwpid> directory vnode. 4274 */ 4275 if (pnp->pr_type == PR_PIDFILE) { 4276 dp = pnp->pr_parent; /* /proc/<pid> */ 4277 VN_HOLD(dp); 4278 vp = pr_lookup_piddir(dp, "lwp"); 4279 VN_RELE(dp); 4280 if ((dp = vp) == NULL) /* /proc/<pid>/lwp */ 4281 return (NULL); 4282 } else if (pnp->pr_type == PR_LWPIDFILE) { 4283 dp = pnp->pr_parent; /* /proc/<pid>/lwp/<lwpid> */ 4284 dp = VTOP(dp)->pr_parent; /* /proc/<pid>/lwp */ 4285 VN_HOLD(dp); 4286 } else { 4287 return (NULL); 4288 } 4289 4290 (void) pr_u32tos(tid, comp, sizeof (comp)); 4291 vp = pr_lookup_lwpdir(dp, comp); 4292 VN_RELE(dp); 4293 if ((dp = vp) == NULL) 4294 return (NULL); 4295 4296 pnp = prgetnode(dp, PR_LWPIDFILE); 4297 vp = PTOV(pnp); 4298 4299 /* 4300 * prgetnode() initialized most of the prnode. 4301 * Finish the job. 4302 */ 4303 pcp = VTOP(dp)->pr_common; 4304 pnp->pr_ino = ptoi(pcp->prc_pid); 4305 pnp->pr_common = pcp; 4306 pnp->pr_pcommon = VTOP(dp)->pr_pcommon; 4307 pnp->pr_parent = dp; 4308 /* 4309 * Link new vnode into list of all /proc vnodes for the process. 4310 */ 4311 p = pr_p_lock(pnp); 4312 mutex_exit(&pr_pidlock); 4313 if (p == NULL) { 4314 VN_RELE(dp); 4315 prfreenode(pnp); 4316 vp = NULL; 4317 } else if (pcp->prc_thread == NULL) { 4318 prunlock(pnp); 4319 VN_RELE(dp); 4320 prfreenode(pnp); 4321 vp = NULL; 4322 } else { 4323 pnp->pr_next = p->p_plist; 4324 p->p_plist = vp; 4325 prunlock(pnp); 4326 } 4327 4328 return (vp); 4329 } 4330 4331 #if defined(DEBUG) 4332 4333 static uint32_t nprnode; 4334 static uint32_t nprcommon; 4335 4336 #define INCREMENT(x) atomic_add_32(&x, 1); 4337 #define DECREMENT(x) atomic_add_32(&x, -1); 4338 4339 #else 4340 4341 #define INCREMENT(x) 4342 #define DECREMENT(x) 4343 4344 #endif /* DEBUG */ 4345 4346 /* 4347 * New /proc vnode required; allocate it and fill in most of the fields. 4348 */ 4349 prnode_t * 4350 prgetnode(vnode_t *dp, prnodetype_t type) 4351 { 4352 prnode_t *pnp; 4353 prcommon_t *pcp; 4354 vnode_t *vp; 4355 ulong_t nfiles; 4356 4357 INCREMENT(nprnode); 4358 pnp = kmem_zalloc(sizeof (prnode_t), KM_SLEEP); 4359 4360 mutex_init(&pnp->pr_mutex, NULL, MUTEX_DEFAULT, NULL); 4361 pnp->pr_type = type; 4362 4363 pnp->pr_vnode = vn_alloc(KM_SLEEP); 4364 4365 vp = PTOV(pnp); 4366 vp->v_flag = VNOCACHE|VNOMAP|VNOSWAP|VNOMOUNT; 4367 vn_setops(vp, prvnodeops); 4368 vp->v_vfsp = dp->v_vfsp; 4369 vp->v_type = VPROC; 4370 vp->v_data = (caddr_t)pnp; 4371 4372 switch (type) { 4373 case PR_PIDDIR: 4374 case PR_LWPIDDIR: 4375 /* 4376 * We need a prcommon and a files array for each of these. 4377 */ 4378 INCREMENT(nprcommon); 4379 4380 pcp = kmem_zalloc(sizeof (prcommon_t), KM_SLEEP); 4381 pcp->prc_refcnt = 1; 4382 pnp->pr_common = pcp; 4383 mutex_init(&pcp->prc_mutex, NULL, MUTEX_DEFAULT, NULL); 4384 cv_init(&pcp->prc_wait, NULL, CV_DEFAULT, NULL); 4385 4386 nfiles = (type == PR_PIDDIR)? NPIDDIRFILES : NLWPIDDIRFILES; 4387 pnp->pr_files = 4388 kmem_zalloc(nfiles * sizeof (vnode_t *), KM_SLEEP); 4389 4390 vp->v_type = VDIR; 4391 /* 4392 * Mode should be read-search by all, but we cannot so long 4393 * as we must support compatibility mode with old /proc. 4394 * Make /proc/<pid> be read by owner only, search by all. 4395 * Make /proc/<pid>/lwp/<lwpid> read-search by all. Also, 4396 * set VDIROPEN on /proc/<pid> so it can be opened for writing. 4397 */ 4398 if (type == PR_PIDDIR) { 4399 /* kludge for old /proc interface */ 4400 prnode_t *xpnp = prgetnode(dp, PR_PIDFILE); 4401 pnp->pr_pidfile = PTOV(xpnp); 4402 pnp->pr_mode = 0511; 4403 vp->v_flag |= VDIROPEN; 4404 } else { 4405 pnp->pr_mode = 0555; 4406 } 4407 4408 break; 4409 4410 case PR_CURDIR: 4411 case PR_ROOTDIR: 4412 case PR_FDDIR: 4413 case PR_OBJECTDIR: 4414 case PR_PATHDIR: 4415 case PR_CTDIR: 4416 case PR_TMPLDIR: 4417 vp->v_type = VDIR; 4418 pnp->pr_mode = 0500; /* read-search by owner only */ 4419 break; 4420 4421 case PR_CT: 4422 vp->v_type = VLNK; 4423 pnp->pr_mode = 0500; /* read-search by owner only */ 4424 break; 4425 4426 case PR_PATH: 4427 case PR_SELF: 4428 vp->v_type = VLNK; 4429 pnp->pr_mode = 0777; 4430 break; 4431 4432 case PR_LWPDIR: 4433 vp->v_type = VDIR; 4434 pnp->pr_mode = 0555; /* read-search by all */ 4435 break; 4436 4437 case PR_AS: 4438 case PR_TMPL: 4439 pnp->pr_mode = 0600; /* read-write by owner only */ 4440 break; 4441 4442 case PR_CTL: 4443 case PR_LWPCTL: 4444 pnp->pr_mode = 0200; /* write-only by owner only */ 4445 break; 4446 4447 case PR_PIDFILE: 4448 case PR_LWPIDFILE: 4449 pnp->pr_mode = 0600; /* read-write by owner only */ 4450 break; 4451 4452 case PR_PSINFO: 4453 case PR_LPSINFO: 4454 case PR_LWPSINFO: 4455 case PR_USAGE: 4456 case PR_LUSAGE: 4457 case PR_LWPUSAGE: 4458 pnp->pr_mode = 0444; /* read-only by all */ 4459 break; 4460 4461 default: 4462 pnp->pr_mode = 0400; /* read-only by owner only */ 4463 break; 4464 } 4465 vn_exists(vp); 4466 return (pnp); 4467 } 4468 4469 /* 4470 * Free the storage obtained from prgetnode(). 4471 */ 4472 void 4473 prfreenode(prnode_t *pnp) 4474 { 4475 vnode_t *vp; 4476 ulong_t nfiles; 4477 4478 vn_invalid(PTOV(pnp)); 4479 vn_free(PTOV(pnp)); 4480 mutex_destroy(&pnp->pr_mutex); 4481 4482 switch (pnp->pr_type) { 4483 case PR_PIDDIR: 4484 /* kludge for old /proc interface */ 4485 if (pnp->pr_pidfile != NULL) { 4486 prfreenode(VTOP(pnp->pr_pidfile)); 4487 pnp->pr_pidfile = NULL; 4488 } 4489 /* FALLTHROUGH */ 4490 case PR_LWPIDDIR: 4491 /* 4492 * We allocated a prcommon and a files array for each of these. 4493 */ 4494 prfreecommon(pnp->pr_common); 4495 nfiles = (pnp->pr_type == PR_PIDDIR)? 4496 NPIDDIRFILES : NLWPIDDIRFILES; 4497 kmem_free(pnp->pr_files, nfiles * sizeof (vnode_t *)); 4498 break; 4499 default: 4500 break; 4501 } 4502 /* 4503 * If there is an underlying vnode, be sure 4504 * to release it after freeing the prnode. 4505 */ 4506 vp = pnp->pr_realvp; 4507 kmem_free(pnp, sizeof (*pnp)); 4508 DECREMENT(nprnode); 4509 if (vp != NULL) { 4510 VN_RELE(vp); 4511 } 4512 } 4513 4514 /* 4515 * Free a prcommon structure, if the refrence count reaches zero. 4516 */ 4517 static void 4518 prfreecommon(prcommon_t *pcp) 4519 { 4520 mutex_enter(&pcp->prc_mutex); 4521 ASSERT(pcp->prc_refcnt > 0); 4522 if (--pcp->prc_refcnt != 0) 4523 mutex_exit(&pcp->prc_mutex); 4524 else { 4525 mutex_exit(&pcp->prc_mutex); 4526 ASSERT(pcp->prc_pollhead.ph_list == NULL); 4527 ASSERT(pcp->prc_refcnt == 0); 4528 ASSERT(pcp->prc_selfopens == 0 && pcp->prc_writers == 0); 4529 mutex_destroy(&pcp->prc_mutex); 4530 cv_destroy(&pcp->prc_wait); 4531 kmem_free(pcp, sizeof (prcommon_t)); 4532 DECREMENT(nprcommon); 4533 } 4534 } 4535 4536 /* 4537 * Array of readdir functions, indexed by /proc file type. 4538 */ 4539 static int pr_readdir_notdir(), pr_readdir_procdir(), pr_readdir_piddir(), 4540 pr_readdir_objectdir(), pr_readdir_lwpdir(), pr_readdir_lwpiddir(), 4541 pr_readdir_fddir(), pr_readdir_pathdir(), pr_readdir_tmpldir(), 4542 pr_readdir_ctdir(); 4543 4544 static int (*pr_readdir_function[PR_NFILES])() = { 4545 pr_readdir_procdir, /* /proc */ 4546 pr_readdir_notdir, /* /proc/self */ 4547 pr_readdir_piddir, /* /proc/<pid> */ 4548 pr_readdir_notdir, /* /proc/<pid>/as */ 4549 pr_readdir_notdir, /* /proc/<pid>/ctl */ 4550 pr_readdir_notdir, /* /proc/<pid>/status */ 4551 pr_readdir_notdir, /* /proc/<pid>/lstatus */ 4552 pr_readdir_notdir, /* /proc/<pid>/psinfo */ 4553 pr_readdir_notdir, /* /proc/<pid>/lpsinfo */ 4554 pr_readdir_notdir, /* /proc/<pid>/map */ 4555 pr_readdir_notdir, /* /proc/<pid>/rmap */ 4556 pr_readdir_notdir, /* /proc/<pid>/xmap */ 4557 pr_readdir_notdir, /* /proc/<pid>/cred */ 4558 pr_readdir_notdir, /* /proc/<pid>/sigact */ 4559 pr_readdir_notdir, /* /proc/<pid>/auxv */ 4560 #if defined(__x86) 4561 pr_readdir_notdir, /* /proc/<pid>/ldt */ 4562 #endif 4563 pr_readdir_notdir, /* /proc/<pid>/usage */ 4564 pr_readdir_notdir, /* /proc/<pid>/lusage */ 4565 pr_readdir_notdir, /* /proc/<pid>/pagedata */ 4566 pr_readdir_notdir, /* /proc/<pid>/watch */ 4567 pr_readdir_notdir, /* /proc/<pid>/cwd */ 4568 pr_readdir_notdir, /* /proc/<pid>/root */ 4569 pr_readdir_fddir, /* /proc/<pid>/fd */ 4570 pr_readdir_notdir, /* /proc/<pid>/fd/nn */ 4571 pr_readdir_objectdir, /* /proc/<pid>/object */ 4572 pr_readdir_notdir, /* /proc/<pid>/object/xxx */ 4573 pr_readdir_lwpdir, /* /proc/<pid>/lwp */ 4574 pr_readdir_lwpiddir, /* /proc/<pid>/lwp/<lwpid> */ 4575 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 4576 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 4577 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpsinfo */ 4578 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpusage */ 4579 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/xregs */ 4580 pr_readdir_tmpldir, /* /proc/<pid>/lwp/<lwpid>/templates */ 4581 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/templates/<id> */ 4582 #if defined(__sparc) 4583 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/gwindows */ 4584 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/asrs */ 4585 #endif 4586 pr_readdir_notdir, /* /proc/<pid>/priv */ 4587 pr_readdir_pathdir, /* /proc/<pid>/path */ 4588 pr_readdir_notdir, /* /proc/<pid>/path/xxx */ 4589 pr_readdir_ctdir, /* /proc/<pid>/contracts */ 4590 pr_readdir_notdir, /* /proc/<pid>/contracts/<ctid> */ 4591 pr_readdir_notdir, /* old process file */ 4592 pr_readdir_notdir, /* old lwp file */ 4593 pr_readdir_notdir, /* old pagedata file */ 4594 }; 4595 4596 /* ARGSUSED */ 4597 static int 4598 prreaddir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp) 4599 { 4600 prnode_t *pnp = VTOP(vp); 4601 4602 ASSERT(pnp->pr_type < PR_NFILES); 4603 4604 return (pr_readdir_function[pnp->pr_type](pnp, uiop, eofp)); 4605 } 4606 4607 /* ARGSUSED */ 4608 static int 4609 pr_readdir_notdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4610 { 4611 return (ENOTDIR); 4612 } 4613 4614 /* ARGSUSED */ 4615 static int 4616 pr_readdir_procdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4617 { 4618 zoneid_t zoneid; 4619 gfs_readdir_state_t gstate; 4620 int error, eof = 0; 4621 offset_t n; 4622 4623 ASSERT(pnp->pr_type == PR_PROCDIR); 4624 4625 zoneid = VTOZONE(PTOV(pnp))->zone_id; 4626 4627 if ((error = gfs_readdir_init(&gstate, PNSIZ, PRSDSIZE, uiop, 4628 PRROOTINO, PRROOTINO)) != 0) 4629 return (error); 4630 4631 /* 4632 * Loop until user's request is satisfied or until all processes 4633 * have been examined. 4634 */ 4635 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 4636 uint_t pid; 4637 int pslot; 4638 proc_t *p; 4639 4640 /* 4641 * Find next entry. Skip processes not visible where 4642 * this /proc was mounted. 4643 */ 4644 mutex_enter(&pidlock); 4645 while (n < v.v_proc && 4646 ((p = pid_entry(n)) == NULL || p->p_stat == SIDL || 4647 (zoneid != GLOBAL_ZONEID && p->p_zone->zone_id != zoneid) || 4648 secpolicy_basic_procinfo(CRED(), p, curproc) != 0)) 4649 n++; 4650 4651 /* 4652 * Stop when entire proc table has been examined. 4653 */ 4654 if (n >= v.v_proc) { 4655 mutex_exit(&pidlock); 4656 eof = 1; 4657 break; 4658 } 4659 4660 ASSERT(p->p_stat != 0); 4661 pid = p->p_pid; 4662 pslot = p->p_slot; 4663 mutex_exit(&pidlock); 4664 error = gfs_readdir_emitn(&gstate, uiop, n, 4665 pmkino(0, pslot, PR_PIDDIR), pid); 4666 if (error) 4667 break; 4668 } 4669 4670 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 4671 } 4672 4673 /* ARGSUSED */ 4674 static int 4675 pr_readdir_piddir(prnode_t *pnp, uio_t *uiop, int *eofp) 4676 { 4677 int zombie = ((pnp->pr_pcommon->prc_flags & PRC_DESTROY) != 0); 4678 prdirent_t dirent; 4679 prdirent_t *dirp; 4680 offset_t off; 4681 int error; 4682 4683 ASSERT(pnp->pr_type == PR_PIDDIR); 4684 4685 if (uiop->uio_offset < 0 || 4686 uiop->uio_offset % sizeof (prdirent_t) != 0 || 4687 uiop->uio_resid < sizeof (prdirent_t)) 4688 return (EINVAL); 4689 if (pnp->pr_pcommon->prc_proc == NULL) 4690 return (ENOENT); 4691 if (uiop->uio_offset >= sizeof (piddir)) 4692 goto out; 4693 4694 /* 4695 * Loop until user's request is satisfied, omitting some 4696 * files along the way if the process is a zombie. 4697 */ 4698 for (dirp = &piddir[uiop->uio_offset / sizeof (prdirent_t)]; 4699 uiop->uio_resid >= sizeof (prdirent_t) && 4700 dirp < &piddir[NPIDDIRFILES+2]; 4701 uiop->uio_offset = off + sizeof (prdirent_t), dirp++) { 4702 off = uiop->uio_offset; 4703 if (zombie) { 4704 switch (dirp->d_ino) { 4705 case PR_PIDDIR: 4706 case PR_PROCDIR: 4707 case PR_PSINFO: 4708 case PR_USAGE: 4709 break; 4710 default: 4711 continue; 4712 } 4713 } 4714 bcopy(dirp, &dirent, sizeof (prdirent_t)); 4715 if (dirent.d_ino == PR_PROCDIR) 4716 dirent.d_ino = PRROOTINO; 4717 else 4718 dirent.d_ino = pmkino(0, pnp->pr_pcommon->prc_slot, 4719 dirent.d_ino); 4720 if ((error = uiomove((caddr_t)&dirent, sizeof (prdirent_t), 4721 UIO_READ, uiop)) != 0) 4722 return (error); 4723 } 4724 out: 4725 if (eofp) 4726 *eofp = (uiop->uio_offset >= sizeof (piddir)); 4727 return (0); 4728 } 4729 4730 static void 4731 rebuild_objdir(struct as *as) 4732 { 4733 struct seg *seg; 4734 vnode_t *vp; 4735 vattr_t vattr; 4736 vnode_t **dir; 4737 ulong_t nalloc; 4738 ulong_t nentries; 4739 int i, j; 4740 ulong_t nold, nnew; 4741 4742 ASSERT(AS_WRITE_HELD(as, &as->a_lock)); 4743 4744 if (as->a_updatedir == 0 && as->a_objectdir != NULL) 4745 return; 4746 as->a_updatedir = 0; 4747 4748 if ((nalloc = avl_numnodes(&as->a_segtree)) == 0 || 4749 (seg = AS_SEGFIRST(as)) == NULL) /* can't happen? */ 4750 return; 4751 4752 /* 4753 * Allocate space for the new object directory. 4754 * (This is usually about two times too many entries.) 4755 */ 4756 nalloc = (nalloc + 0xf) & ~0xf; /* multiple of 16 */ 4757 dir = kmem_zalloc(nalloc * sizeof (vnode_t *), KM_SLEEP); 4758 4759 /* fill in the new directory with desired entries */ 4760 nentries = 0; 4761 do { 4762 vattr.va_mask = AT_FSID|AT_NODEID; 4763 if (seg->s_ops == &segvn_ops && 4764 SEGOP_GETVP(seg, seg->s_base, &vp) == 0 && 4765 vp != NULL && vp->v_type == VREG && 4766 VOP_GETATTR(vp, &vattr, 0, CRED()) == 0) { 4767 for (i = 0; i < nentries; i++) 4768 if (vp == dir[i]) 4769 break; 4770 if (i == nentries) { 4771 ASSERT(nentries < nalloc); 4772 dir[nentries++] = vp; 4773 } 4774 } 4775 } while ((seg = AS_SEGNEXT(as, seg)) != NULL); 4776 4777 if (as->a_objectdir == NULL) { /* first time */ 4778 as->a_objectdir = dir; 4779 as->a_sizedir = nalloc; 4780 return; 4781 } 4782 4783 /* 4784 * Null out all of the defunct entries in the old directory. 4785 */ 4786 nold = 0; 4787 nnew = nentries; 4788 for (i = 0; i < as->a_sizedir; i++) { 4789 if ((vp = as->a_objectdir[i]) != NULL) { 4790 for (j = 0; j < nentries; j++) { 4791 if (vp == dir[j]) { 4792 dir[j] = NULL; 4793 nnew--; 4794 break; 4795 } 4796 } 4797 if (j == nentries) 4798 as->a_objectdir[i] = NULL; 4799 else 4800 nold++; 4801 } 4802 } 4803 4804 if (nold + nnew > as->a_sizedir) { 4805 /* 4806 * Reallocate the old directory to have enough 4807 * space for the old and new entries combined. 4808 * Round up to the next multiple of 16. 4809 */ 4810 ulong_t newsize = (nold + nnew + 0xf) & ~0xf; 4811 vnode_t **newdir = kmem_zalloc(newsize * sizeof (vnode_t *), 4812 KM_SLEEP); 4813 bcopy(as->a_objectdir, newdir, 4814 as->a_sizedir * sizeof (vnode_t *)); 4815 kmem_free(as->a_objectdir, as->a_sizedir * sizeof (vnode_t *)); 4816 as->a_objectdir = newdir; 4817 as->a_sizedir = newsize; 4818 } 4819 4820 /* 4821 * Move all new entries to the old directory and 4822 * deallocate the space used by the new directory. 4823 */ 4824 if (nnew) { 4825 for (i = 0, j = 0; i < nentries; i++) { 4826 if ((vp = dir[i]) == NULL) 4827 continue; 4828 for (; j < as->a_sizedir; j++) { 4829 if (as->a_objectdir[j] != NULL) 4830 continue; 4831 as->a_objectdir[j++] = vp; 4832 break; 4833 } 4834 } 4835 } 4836 kmem_free(dir, nalloc * sizeof (vnode_t *)); 4837 } 4838 4839 /* 4840 * Return the vnode from a slot in the process's object directory. 4841 * The caller must have locked the process's address space. 4842 * The only caller is below, in pr_readdir_objectdir(). 4843 */ 4844 static vnode_t * 4845 obj_entry(struct as *as, int slot) 4846 { 4847 ASSERT(AS_LOCK_HELD(as, &as->a_lock)); 4848 if (as->a_objectdir == NULL) 4849 return (NULL); 4850 ASSERT(slot < as->a_sizedir); 4851 return (as->a_objectdir[slot]); 4852 } 4853 4854 /* ARGSUSED */ 4855 static int 4856 pr_readdir_objectdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4857 { 4858 gfs_readdir_state_t gstate; 4859 int error, eof = 0; 4860 offset_t n; 4861 int pslot; 4862 size_t objdirsize; 4863 proc_t *p; 4864 struct as *as; 4865 vnode_t *vp; 4866 4867 ASSERT(pnp->pr_type == PR_OBJECTDIR); 4868 4869 if ((error = prlock(pnp, ZNO)) != 0) 4870 return (error); 4871 p = pnp->pr_common->prc_proc; 4872 pslot = p->p_slot; 4873 4874 /* 4875 * We drop p_lock before grabbing the address space lock 4876 * in order to avoid a deadlock with the clock thread. 4877 * The process will not disappear and its address space 4878 * will not change because it is marked P_PR_LOCK. 4879 */ 4880 mutex_exit(&p->p_lock); 4881 4882 if ((error = gfs_readdir_init(&gstate, 64, PRSDSIZE, uiop, 4883 pmkino(0, pslot, PR_PIDDIR), 4884 pmkino(0, pslot, PR_OBJECTDIR))) != 0) { 4885 mutex_enter(&p->p_lock); 4886 prunlock(pnp); 4887 return (error); 4888 } 4889 4890 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 4891 as = NULL; 4892 objdirsize = 0; 4893 } 4894 4895 /* 4896 * Loop until user's request is satisfied or until 4897 * all mapped objects have been examined. Cannot hold 4898 * the address space lock for the following call as 4899 * gfs_readdir_pred() utimately causes a call to uiomove(). 4900 */ 4901 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 4902 vattr_t vattr; 4903 char str[64]; 4904 4905 /* 4906 * Set the correct size of the directory just 4907 * in case the process has changed it's address 4908 * space via mmap/munmap calls. 4909 */ 4910 if (as != NULL) { 4911 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 4912 if (as->a_updatedir) 4913 rebuild_objdir(as); 4914 objdirsize = as->a_sizedir; 4915 } 4916 4917 /* 4918 * Find next object. 4919 */ 4920 vattr.va_mask = AT_FSID | AT_NODEID; 4921 while (n < objdirsize && (((vp = obj_entry(as, n)) == NULL) || 4922 (VOP_GETATTR(vp, &vattr, 0, CRED()) != 0))) { 4923 vattr.va_mask = AT_FSID | AT_NODEID; 4924 n++; 4925 } 4926 4927 if (as != NULL) 4928 AS_LOCK_EXIT(as, &as->a_lock); 4929 4930 /* 4931 * Stop when all objects have been reported. 4932 */ 4933 if (n >= objdirsize) { 4934 eof = 1; 4935 break; 4936 } 4937 4938 if (vp == p->p_exec) 4939 (void) strcpy(str, "a.out"); 4940 else 4941 pr_object_name(str, vp, &vattr); 4942 4943 error = gfs_readdir_emit(&gstate, uiop, n, vattr.va_nodeid, 4944 str); 4945 4946 if (error) 4947 break; 4948 } 4949 4950 mutex_enter(&p->p_lock); 4951 prunlock(pnp); 4952 4953 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 4954 } 4955 4956 /* ARGSUSED */ 4957 static int 4958 pr_readdir_lwpdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4959 { 4960 gfs_readdir_state_t gstate; 4961 int error, eof = 0; 4962 offset_t tslot; 4963 proc_t *p; 4964 int pslot; 4965 lwpdir_t *lwpdir; 4966 int lwpdirsize; 4967 4968 ASSERT(pnp->pr_type == PR_LWPDIR); 4969 4970 p = pr_p_lock(pnp); 4971 mutex_exit(&pr_pidlock); 4972 if (p == NULL) 4973 return (ENOENT); 4974 ASSERT(p == pnp->pr_common->prc_proc); 4975 pslot = p->p_slot; 4976 lwpdir = p->p_lwpdir; 4977 lwpdirsize = p->p_lwpdir_sz; 4978 4979 /* 4980 * Drop p->p_lock so we can safely do uiomove(). 4981 * The lwp directory will not change because 4982 * we have the process locked with P_PR_LOCK. 4983 */ 4984 mutex_exit(&p->p_lock); 4985 4986 4987 if ((error = gfs_readdir_init(&gstate, PLNSIZ, PRSDSIZE, uiop, 4988 pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_LWPDIR))) != 0) { 4989 mutex_enter(&p->p_lock); 4990 prunlock(pnp); 4991 return (error); 4992 } 4993 4994 /* 4995 * Loop until user's request is satisfied or until all lwps 4996 * have been examined. 4997 */ 4998 while ((error = gfs_readdir_pred(&gstate, uiop, &tslot)) == 0) { 4999 lwpent_t *lep; 5000 uint_t tid; 5001 5002 /* 5003 * Find next LWP. 5004 */ 5005 while (tslot < lwpdirsize && 5006 ((lep = lwpdir[tslot].ld_entry) == NULL)) 5007 tslot++; 5008 /* 5009 * Stop when all lwps have been reported. 5010 */ 5011 if (tslot >= lwpdirsize) { 5012 eof = 1; 5013 break; 5014 } 5015 5016 tid = lep->le_lwpid; 5017 error = gfs_readdir_emitn(&gstate, uiop, tslot, 5018 pmkino(tslot, pslot, PR_LWPIDDIR), tid); 5019 if (error) 5020 break; 5021 } 5022 5023 mutex_enter(&p->p_lock); 5024 prunlock(pnp); 5025 5026 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5027 } 5028 5029 /* ARGSUSED */ 5030 static int 5031 pr_readdir_lwpiddir(prnode_t *pnp, uio_t *uiop, int *eofp) 5032 { 5033 prcommon_t *pcp = pnp->pr_common; 5034 int zombie = ((pcp->prc_flags & PRC_DESTROY) != 0); 5035 prdirent_t dirent; 5036 prdirent_t *dirp; 5037 offset_t off; 5038 int error; 5039 int pslot; 5040 int tslot; 5041 5042 ASSERT(pnp->pr_type == PR_LWPIDDIR); 5043 5044 if (uiop->uio_offset < 0 || 5045 uiop->uio_offset % sizeof (prdirent_t) != 0 || 5046 uiop->uio_resid < sizeof (prdirent_t)) 5047 return (EINVAL); 5048 if (pcp->prc_proc == NULL || pcp->prc_tslot == -1) 5049 return (ENOENT); 5050 if (uiop->uio_offset >= sizeof (lwpiddir)) 5051 goto out; 5052 5053 /* 5054 * Loop until user's request is satisfied, omitting some files 5055 * along the way if the lwp is a zombie and also depending 5056 * on the data model of the process. 5057 */ 5058 pslot = pcp->prc_slot; 5059 tslot = pcp->prc_tslot; 5060 for (dirp = &lwpiddir[uiop->uio_offset / sizeof (prdirent_t)]; 5061 uiop->uio_resid >= sizeof (prdirent_t) && 5062 dirp < &lwpiddir[NLWPIDDIRFILES+2]; 5063 uiop->uio_offset = off + sizeof (prdirent_t), dirp++) { 5064 off = uiop->uio_offset; 5065 if (zombie) { 5066 switch (dirp->d_ino) { 5067 case PR_LWPIDDIR: 5068 case PR_LWPDIR: 5069 case PR_LWPSINFO: 5070 break; 5071 default: 5072 continue; 5073 } 5074 } 5075 #if defined(__sparc) 5076 /* the asrs file exists only for sparc v9 _LP64 processes */ 5077 if (dirp->d_ino == PR_ASRS && 5078 pcp->prc_datamodel != DATAMODEL_LP64) 5079 continue; 5080 #endif 5081 bcopy(dirp, &dirent, sizeof (prdirent_t)); 5082 if (dirent.d_ino == PR_LWPDIR) 5083 dirent.d_ino = pmkino(0, pslot, dirp->d_ino); 5084 else 5085 dirent.d_ino = pmkino(tslot, pslot, dirp->d_ino); 5086 if ((error = uiomove((caddr_t)&dirent, sizeof (prdirent_t), 5087 UIO_READ, uiop)) != 0) 5088 return (error); 5089 } 5090 out: 5091 if (eofp) 5092 *eofp = (uiop->uio_offset >= sizeof (lwpiddir)); 5093 return (0); 5094 } 5095 5096 /* ARGSUSED */ 5097 static int 5098 pr_readdir_fddir(prnode_t *pnp, uio_t *uiop, int *eofp) 5099 { 5100 gfs_readdir_state_t gstate; 5101 int error, eof = 0; 5102 offset_t n; 5103 proc_t *p; 5104 int pslot; 5105 int fddirsize; 5106 uf_info_t *fip; 5107 5108 ASSERT(pnp->pr_type == PR_FDDIR); 5109 5110 if ((error = prlock(pnp, ZNO)) != 0) 5111 return (error); 5112 p = pnp->pr_common->prc_proc; 5113 pslot = p->p_slot; 5114 fip = P_FINFO(p); 5115 mutex_exit(&p->p_lock); 5116 5117 if ((error = gfs_readdir_init(&gstate, PLNSIZ, PRSDSIZE, uiop, 5118 pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_FDDIR))) != 0) { 5119 mutex_enter(&p->p_lock); 5120 prunlock(pnp); 5121 return (error); 5122 } 5123 5124 mutex_enter(&fip->fi_lock); 5125 if ((p->p_flag & SSYS) || p->p_as == &kas) 5126 fddirsize = 0; 5127 else 5128 fddirsize = fip->fi_nfiles; 5129 5130 /* 5131 * Loop until user's request is satisfied or until 5132 * all file descriptors have been examined. 5133 */ 5134 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 5135 /* 5136 * Find next fd. 5137 */ 5138 while (n < fddirsize && fip->fi_list[n].uf_file == NULL) 5139 n++; 5140 /* 5141 * Stop when all fds have been reported. 5142 */ 5143 if (n >= fddirsize) { 5144 eof = 1; 5145 break; 5146 } 5147 5148 error = gfs_readdir_emitn(&gstate, uiop, n, 5149 pmkino(n, pslot, PR_FD), n); 5150 if (error) 5151 break; 5152 } 5153 5154 mutex_exit(&fip->fi_lock); 5155 mutex_enter(&p->p_lock); 5156 prunlock(pnp); 5157 5158 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5159 } 5160 5161 /* ARGSUSED */ 5162 static int 5163 pr_readdir_pathdir(prnode_t *pnp, uio_t *uiop, int *eofp) 5164 { 5165 longlong_t bp[DIRENT64_RECLEN(64) / sizeof (longlong_t)]; 5166 dirent64_t *dirent = (dirent64_t *)bp; 5167 int reclen; 5168 ssize_t oresid; 5169 offset_t off, idx; 5170 int error = 0; 5171 proc_t *p; 5172 int fd, obj; 5173 int pslot; 5174 int fddirsize; 5175 uf_info_t *fip; 5176 struct as *as = NULL; 5177 size_t objdirsize; 5178 vattr_t vattr; 5179 vnode_t *vp; 5180 5181 ASSERT(pnp->pr_type == PR_PATHDIR); 5182 5183 if (uiop->uio_offset < 0 || 5184 uiop->uio_resid <= 0 || 5185 (uiop->uio_offset % PRSDSIZE) != 0) 5186 return (EINVAL); 5187 oresid = uiop->uio_resid; 5188 bzero(bp, sizeof (bp)); 5189 5190 if ((error = prlock(pnp, ZNO)) != 0) 5191 return (error); 5192 p = pnp->pr_common->prc_proc; 5193 fip = P_FINFO(p); 5194 pslot = p->p_slot; 5195 mutex_exit(&p->p_lock); 5196 5197 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 5198 as = NULL; 5199 objdirsize = 0; 5200 } else { 5201 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 5202 if (as->a_updatedir) 5203 rebuild_objdir(as); 5204 objdirsize = as->a_sizedir; 5205 AS_LOCK_EXIT(as, &as->a_lock); 5206 as = NULL; 5207 } 5208 5209 mutex_enter(&fip->fi_lock); 5210 if ((p->p_flag & SSYS) || p->p_as == &kas) 5211 fddirsize = 0; 5212 else 5213 fddirsize = fip->fi_nfiles; 5214 5215 for (; uiop->uio_resid > 0; uiop->uio_offset = off + PRSDSIZE) { 5216 /* 5217 * There are 4 special files in the path directory: ".", "..", 5218 * "root", and "cwd". We handle those specially here. 5219 */ 5220 off = uiop->uio_offset; 5221 idx = off / PRSDSIZE; 5222 if (off == 0) { /* "." */ 5223 dirent->d_ino = pmkino(0, pslot, PR_PATHDIR); 5224 dirent->d_name[0] = '.'; 5225 dirent->d_name[1] = '\0'; 5226 reclen = DIRENT64_RECLEN(1); 5227 } else if (idx == 1) { /* ".." */ 5228 dirent->d_ino = pmkino(0, pslot, PR_PIDDIR); 5229 dirent->d_name[0] = '.'; 5230 dirent->d_name[1] = '.'; 5231 dirent->d_name[2] = '\0'; 5232 reclen = DIRENT64_RECLEN(2); 5233 } else if (idx == 2) { /* "root" */ 5234 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5235 (void) strcpy(dirent->d_name, "root"); 5236 reclen = DIRENT64_RECLEN(4); 5237 } else if (idx == 3) { /* "cwd" */ 5238 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5239 (void) strcpy(dirent->d_name, "cwd"); 5240 reclen = DIRENT64_RECLEN(3); 5241 } else if (idx < 4 + fddirsize) { 5242 /* 5243 * In this case, we have one of the file descriptors. 5244 */ 5245 fd = idx - 4; 5246 if (fip->fi_list[fd].uf_file == NULL) 5247 continue; 5248 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5249 (void) pr_u32tos(fd, dirent->d_name, PLNSIZ+1); 5250 reclen = DIRENT64_RECLEN(PLNSIZ); 5251 } else if (idx < 4 + fddirsize + objdirsize) { 5252 if (fip != NULL) { 5253 mutex_exit(&fip->fi_lock); 5254 fip = NULL; 5255 } 5256 5257 /* 5258 * We drop p_lock before grabbing the address space lock 5259 * in order to avoid a deadlock with the clock thread. 5260 * The process will not disappear and its address space 5261 * will not change because it is marked P_PR_LOCK. 5262 */ 5263 if (as == NULL) { 5264 as = p->p_as; 5265 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 5266 } 5267 5268 if (as->a_updatedir) { 5269 rebuild_objdir(as); 5270 objdirsize = as->a_sizedir; 5271 } 5272 5273 obj = idx - 4 - fddirsize; 5274 if ((vp = obj_entry(as, obj)) == NULL) 5275 continue; 5276 vattr.va_mask = AT_FSID|AT_NODEID; 5277 if (VOP_GETATTR(vp, &vattr, 0, CRED()) != 0) 5278 continue; 5279 if (vp == p->p_exec) 5280 (void) strcpy(dirent->d_name, "a.out"); 5281 else 5282 pr_object_name(dirent->d_name, vp, &vattr); 5283 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5284 reclen = DIRENT64_RECLEN(strlen(dirent->d_name)); 5285 } else { 5286 break; 5287 } 5288 5289 dirent->d_off = uiop->uio_offset + PRSDSIZE; 5290 dirent->d_reclen = (ushort_t)reclen; 5291 if (reclen > uiop->uio_resid) { 5292 /* 5293 * Error if no entries have been returned yet. 5294 */ 5295 if (uiop->uio_resid == oresid) 5296 error = EINVAL; 5297 break; 5298 } 5299 /* 5300 * Drop the address space lock to do the uiomove(). 5301 */ 5302 if (as != NULL) 5303 AS_LOCK_EXIT(as, &as->a_lock); 5304 5305 error = uiomove((caddr_t)dirent, reclen, UIO_READ, uiop); 5306 if (as != NULL) 5307 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 5308 5309 if (error) 5310 break; 5311 } 5312 5313 if (error == 0 && eofp) 5314 *eofp = (uiop->uio_offset >= (fddirsize + 2) * PRSDSIZE); 5315 5316 if (fip != NULL) 5317 mutex_exit(&fip->fi_lock); 5318 if (as != NULL) 5319 AS_LOCK_EXIT(as, &as->a_lock); 5320 mutex_enter(&p->p_lock); 5321 prunlock(pnp); 5322 return (error); 5323 } 5324 5325 static int 5326 pr_readdir_tmpldir(prnode_t *pnp, uio_t *uiop, int *eofp) 5327 { 5328 proc_t *p; 5329 int pslot, tslot; 5330 gfs_readdir_state_t gstate; 5331 int error, eof = 0; 5332 offset_t n; 5333 5334 ASSERT(pnp->pr_type == PR_TMPLDIR); 5335 5336 if ((error = prlock(pnp, ZNO)) != 0) 5337 return (error); 5338 p = pnp->pr_common->prc_proc; 5339 pslot = pnp->pr_common->prc_slot; 5340 tslot = pnp->pr_common->prc_tslot; 5341 mutex_exit(&p->p_lock); 5342 5343 if ((error = gfs_readdir_init(&gstate, PRDIRSIZE, PRSDSIZE, uiop, 5344 pmkino(tslot, pslot, PR_LWPDIR), 5345 pmkino(tslot, pslot, PR_TMPLDIR))) != 0) { 5346 mutex_enter(&p->p_lock); 5347 prunlock(pnp); 5348 return (error); 5349 } 5350 5351 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 5352 /* 5353 * Check for an active template. Reading a directory's 5354 * contents is already racy, so we don't bother taking 5355 * any locks. 5356 */ 5357 while (n < ct_ntypes && 5358 pnp->pr_common->prc_thread->t_lwp->lwp_ct_active[n] == NULL) 5359 n++; 5360 /* 5361 * Stop when all types have been reported. 5362 */ 5363 if (n >= ct_ntypes) { 5364 eof = 1; 5365 break; 5366 } 5367 /* 5368 * The pmkino invocation below will need to be updated 5369 * when we create our fifth contract type. 5370 */ 5371 ASSERT(ct_ntypes <= 4); 5372 error = gfs_readdir_emit(&gstate, uiop, n, 5373 pmkino((tslot << 2) | n, pslot, PR_TMPL), 5374 ct_types[n]->ct_type_name); 5375 if (error) 5376 break; 5377 } 5378 5379 mutex_enter(&p->p_lock); 5380 prunlock(pnp); 5381 5382 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5383 } 5384 5385 static int 5386 pr_readdir_ctdir(prnode_t *pnp, uio_t *uiop, int *eofp) 5387 { 5388 proc_t *p; 5389 int pslot; 5390 gfs_readdir_state_t gstate; 5391 int error, eof = 0; 5392 offset_t n; 5393 uint64_t zid; 5394 5395 ASSERT(pnp->pr_type == PR_CTDIR); 5396 5397 if ((error = prlock(pnp, ZNO)) != 0) 5398 return (error); 5399 p = pnp->pr_common->prc_proc; 5400 pslot = p->p_slot; 5401 mutex_exit(&p->p_lock); 5402 5403 if ((error = gfs_readdir_init(&gstate, PRDIRSIZE, PRSDSIZE, uiop, 5404 pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_CTDIR))) != 0) { 5405 mutex_enter(&p->p_lock); 5406 prunlock(pnp); 5407 return (error); 5408 } 5409 5410 zid = VTOZONE(pnp->pr_vnode)->zone_uniqid; 5411 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 5412 id_t next = contract_plookup(p, n, zid); 5413 if (next == -1) { 5414 eof = 1; 5415 break; 5416 } 5417 error = gfs_readdir_emitn(&gstate, uiop, next, 5418 pmkino(next, pslot, PR_CT), next); 5419 if (error) 5420 break; 5421 } 5422 5423 mutex_enter(&p->p_lock); 5424 prunlock(pnp); 5425 5426 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5427 } 5428 5429 /* ARGSUSED */ 5430 static int 5431 prfsync(vnode_t *vp, int syncflag, cred_t *cr) 5432 { 5433 return (0); 5434 } 5435 5436 /* 5437 * Utility: remove a /proc vnode from a linked list, threaded through pr_next. 5438 */ 5439 static void 5440 pr_list_unlink(vnode_t *pvp, vnode_t **listp) 5441 { 5442 vnode_t *vp; 5443 prnode_t *pnp; 5444 5445 while ((vp = *listp) != NULL) { 5446 pnp = VTOP(vp); 5447 if (vp == pvp) { 5448 *listp = pnp->pr_next; 5449 pnp->pr_next = NULL; 5450 break; 5451 } 5452 listp = &pnp->pr_next; 5453 } 5454 } 5455 5456 /* ARGSUSED */ 5457 static void 5458 prinactive(vnode_t *vp, cred_t *cr) 5459 { 5460 prnode_t *pnp = VTOP(vp); 5461 prnodetype_t type = pnp->pr_type; 5462 proc_t *p; 5463 vnode_t *dp; 5464 vnode_t *ovp = NULL; 5465 prnode_t *opnp = NULL; 5466 5467 switch (type) { 5468 case PR_OBJECT: 5469 case PR_FD: 5470 case PR_SELF: 5471 case PR_PATH: 5472 /* These are not linked into the usual lists */ 5473 ASSERT(vp->v_count == 1); 5474 if ((dp = pnp->pr_parent) != NULL) 5475 VN_RELE(dp); 5476 prfreenode(pnp); 5477 return; 5478 default: 5479 break; 5480 } 5481 5482 mutex_enter(&pr_pidlock); 5483 if (pnp->pr_pcommon == NULL) 5484 p = NULL; 5485 else if ((p = pnp->pr_pcommon->prc_proc) != NULL) 5486 mutex_enter(&p->p_lock); 5487 mutex_enter(&vp->v_lock); 5488 5489 if (type == PR_PROCDIR || vp->v_count > 1) { 5490 vp->v_count--; 5491 mutex_exit(&vp->v_lock); 5492 if (p != NULL) 5493 mutex_exit(&p->p_lock); 5494 mutex_exit(&pr_pidlock); 5495 return; 5496 } 5497 5498 if ((dp = pnp->pr_parent) != NULL) { 5499 prnode_t *dpnp; 5500 5501 switch (type) { 5502 case PR_PIDFILE: 5503 case PR_LWPIDFILE: 5504 case PR_OPAGEDATA: 5505 break; 5506 default: 5507 dpnp = VTOP(dp); 5508 mutex_enter(&dpnp->pr_mutex); 5509 if (dpnp->pr_files != NULL && 5510 dpnp->pr_files[pnp->pr_index] == vp) 5511 dpnp->pr_files[pnp->pr_index] = NULL; 5512 mutex_exit(&dpnp->pr_mutex); 5513 break; 5514 } 5515 pnp->pr_parent = NULL; 5516 } 5517 5518 ASSERT(vp->v_count == 1); 5519 5520 /* 5521 * If we allocated an old /proc/pid node, free it too. 5522 */ 5523 if (pnp->pr_pidfile != NULL) { 5524 ASSERT(type == PR_PIDDIR); 5525 ovp = pnp->pr_pidfile; 5526 opnp = VTOP(ovp); 5527 ASSERT(opnp->pr_type == PR_PIDFILE); 5528 pnp->pr_pidfile = NULL; 5529 } 5530 5531 mutex_exit(&pr_pidlock); 5532 5533 if (p != NULL) { 5534 /* 5535 * Remove the vnodes from the lists of 5536 * /proc vnodes for the process. 5537 */ 5538 int slot; 5539 5540 switch (type) { 5541 case PR_PIDDIR: 5542 pr_list_unlink(vp, &p->p_trace); 5543 break; 5544 case PR_LWPIDDIR: 5545 if ((slot = pnp->pr_common->prc_tslot) != -1) { 5546 lwpent_t *lep = p->p_lwpdir[slot].ld_entry; 5547 pr_list_unlink(vp, &lep->le_trace); 5548 } 5549 break; 5550 default: 5551 pr_list_unlink(vp, &p->p_plist); 5552 break; 5553 } 5554 if (ovp != NULL) 5555 pr_list_unlink(ovp, &p->p_plist); 5556 mutex_exit(&p->p_lock); 5557 } 5558 5559 mutex_exit(&vp->v_lock); 5560 5561 if (type == PR_CT && pnp->pr_contract != NULL) { 5562 contract_rele(pnp->pr_contract); 5563 pnp->pr_contract = NULL; 5564 } 5565 5566 if (opnp != NULL) 5567 prfreenode(opnp); 5568 prfreenode(pnp); 5569 if (dp != NULL) { 5570 VN_RELE(dp); 5571 } 5572 } 5573 5574 /* ARGSUSED */ 5575 static int 5576 prseek(vnode_t *vp, offset_t ooff, offset_t *noffp) 5577 { 5578 return (0); 5579 } 5580 5581 /* 5582 * We use the p_execdir member of proc_t to expand the %d token in core file 5583 * paths (the directory path for the executable that dumped core; see 5584 * coreadm(1M) for details). We'd like gcore(1) to be able to expand %d in 5585 * the same way as core dumping from the kernel, but there's no convenient 5586 * and comprehensible way to export the path name for p_execdir. To solve 5587 * this, we try to find the actual path to the executable that was used. In 5588 * pr_lookup_pathdir(), we mark the a.out path name vnode with the PR_AOUT 5589 * flag, and use that here to indicate that more work is needed beyond the 5590 * call to vnodetopath(). 5591 */ 5592 static int 5593 prreadlink_lookup(prnode_t *pnp, char *buf, size_t size, cred_t *cr) 5594 { 5595 proc_t *p; 5596 vnode_t *vp, *execvp, *vrootp; 5597 int ret; 5598 size_t len; 5599 dirent64_t *dp; 5600 size_t dlen = DIRENT64_RECLEN(MAXPATHLEN); 5601 char *dbuf; 5602 5603 p = curproc; 5604 mutex_enter(&p->p_lock); 5605 if ((vrootp = PTOU(p)->u_rdir) == NULL) 5606 vrootp = rootdir; 5607 VN_HOLD(vrootp); 5608 mutex_exit(&p->p_lock); 5609 5610 ret = vnodetopath(vrootp, pnp->pr_realvp, buf, size, cr); 5611 5612 /* 5613 * If PR_AOUT isn't set, then we looked up the path for the vnode; 5614 * otherwise, we looked up the path for (what we believe to be) the 5615 * containing directory. 5616 */ 5617 if ((pnp->pr_flags & PR_AOUT) == 0) { 5618 VN_RELE(vrootp); 5619 return (ret); 5620 } 5621 5622 /* 5623 * Fail if there's a problem locking the process. This will only 5624 * occur if the process is changing so the information we would 5625 * report would already be invalid. 5626 */ 5627 if (prlock(pnp, ZNO) != 0) { 5628 VN_RELE(vrootp); 5629 return (EIO); 5630 } 5631 5632 p = pnp->pr_common->prc_proc; 5633 mutex_exit(&p->p_lock); 5634 5635 execvp = p->p_exec; 5636 VN_HOLD(execvp); 5637 5638 /* 5639 * If our initial lookup of the directory failed, fall back to 5640 * the path name information for p_exec. 5641 */ 5642 if (ret != 0) { 5643 mutex_enter(&p->p_lock); 5644 prunlock(pnp); 5645 ret = vnodetopath(vrootp, execvp, buf, size, cr); 5646 VN_RELE(execvp); 5647 VN_RELE(vrootp); 5648 return (ret); 5649 } 5650 5651 len = strlen(buf); 5652 5653 /* 5654 * We use u_comm as a guess for the last component of the full 5655 * executable path name. If there isn't going to be enough space 5656 * we fall back to using the p_exec so that we can have _an_ 5657 * answer even if it's not perfect. 5658 */ 5659 if (strlen(PTOU(p)->u_comm) + len + 1 < size) { 5660 buf[len] = '/'; 5661 (void) strcpy(buf + len + 1, PTOU(p)->u_comm); 5662 mutex_enter(&p->p_lock); 5663 prunlock(pnp); 5664 5665 /* 5666 * Do a forward lookup of our u_comm guess. 5667 */ 5668 if (lookupnameat(buf + len + 1, UIO_SYSSPACE, FOLLOW, NULLVPP, 5669 &vp, pnp->pr_realvp) == 0) { 5670 if (vn_compare(vp, execvp)) { 5671 VN_RELE(vp); 5672 VN_RELE(execvp); 5673 VN_RELE(vrootp); 5674 return (0); 5675 } 5676 5677 VN_RELE(vp); 5678 } 5679 } else { 5680 mutex_enter(&p->p_lock); 5681 prunlock(pnp); 5682 } 5683 5684 dbuf = kmem_alloc(dlen, KM_SLEEP); 5685 5686 /* 5687 * Try to find a matching vnode by iterating through the directory's 5688 * entries. If that fails, fall back to the path information for 5689 * p_exec. 5690 */ 5691 if ((ret = dirfindvp(vrootp, pnp->pr_realvp, execvp, cr, dbuf, 5692 dlen, &dp)) == 0 && strlen(dp->d_name) + len + 1 < size) { 5693 buf[len] = '/'; 5694 (void) strcpy(buf + len + 1, dp->d_name); 5695 } else { 5696 ret = vnodetopath(vrootp, execvp, buf, size, cr); 5697 } 5698 5699 kmem_free(dbuf, dlen); 5700 VN_RELE(execvp); 5701 VN_RELE(vrootp); 5702 5703 return (ret); 5704 } 5705 5706 /* ARGSUSED */ 5707 static int 5708 prreadlink(vnode_t *vp, uio_t *uiop, cred_t *cr) 5709 { 5710 prnode_t *pnp = VTOP(vp); 5711 char *buf; 5712 int ret = EINVAL; 5713 char idbuf[16]; 5714 int length, rlength; 5715 contract_t *ct; 5716 5717 switch (pnp->pr_type) { 5718 case PR_SELF: 5719 (void) snprintf(idbuf, sizeof (idbuf), "%d", curproc->p_pid); 5720 ret = uiomove(idbuf, strlen(idbuf), UIO_READ, uiop); 5721 break; 5722 case PR_OBJECT: 5723 case PR_FD: 5724 case PR_CURDIR: 5725 case PR_ROOTDIR: 5726 if (pnp->pr_realvp->v_type == VDIR) 5727 ret = 0; 5728 break; 5729 case PR_PATH: 5730 buf = kmem_alloc(MAXPATHLEN, KM_SLEEP); 5731 5732 if ((ret = prreadlink_lookup(pnp, buf, MAXPATHLEN, cr)) == 0) 5733 ret = uiomove(buf, strlen(buf), UIO_READ, uiop); 5734 5735 kmem_free(buf, MAXPATHLEN); 5736 break; 5737 case PR_CT: 5738 ASSERT(pnp->pr_contract != NULL); 5739 ct = pnp->pr_contract; 5740 length = sizeof (CTFS_ROOT "//") + sizeof (idbuf) + 5741 strlen(ct->ct_type->ct_type_name); 5742 buf = kmem_alloc(length, KM_SLEEP); 5743 rlength = snprintf(buf, length, CTFS_ROOT "/%s/%d", 5744 ct->ct_type->ct_type_name, ct->ct_id); 5745 ASSERT(rlength < length); 5746 ret = uiomove(buf, rlength, UIO_READ, uiop); 5747 kmem_free(buf, length); 5748 break; 5749 default: 5750 break; 5751 } 5752 5753 return (ret); 5754 } 5755 5756 static int 5757 prcmp(vnode_t *vp1, vnode_t *vp2) 5758 { 5759 prnode_t *pp1, *pp2; 5760 5761 if (vp1 == vp2) 5762 return (1); 5763 5764 if (!vn_matchops(vp1, prvnodeops) || !vn_matchops(vp2, prvnodeops)) 5765 return (0); 5766 5767 pp1 = VTOP(vp1); 5768 pp2 = VTOP(vp2); 5769 5770 if (pp1->pr_type != pp2->pr_type) 5771 return (0); 5772 if (pp1->pr_type == PR_PROCDIR) 5773 return (1); 5774 if (pp1->pr_ino || pp2->pr_ino) 5775 return (pp2->pr_ino == pp1->pr_ino); 5776 5777 if (pp1->pr_common == NULL || pp2->pr_common == NULL) 5778 return (0); 5779 5780 return (pp1->pr_common->prc_slot == pp2->pr_common->prc_slot && 5781 pp1->pr_common->prc_tslot == pp2->pr_common->prc_tslot); 5782 } 5783 5784 static int 5785 prrealvp(vnode_t *vp, vnode_t **vpp) 5786 { 5787 vnode_t *rvp; 5788 5789 if ((rvp = VTOP(vp)->pr_realvp) != NULL) { 5790 vp = rvp; 5791 if (VOP_REALVP(vp, &rvp) == 0) 5792 vp = rvp; 5793 } 5794 5795 *vpp = vp; 5796 return (0); 5797 } 5798 5799 /* 5800 * Return the answer requested to poll(). 5801 * POLLIN, POLLRDNORM, and POLLOUT are recognized as in fs_poll(). 5802 * In addition, these have special meaning for /proc files: 5803 * POLLPRI process or lwp stopped on an event of interest 5804 * POLLERR /proc file descriptor is invalid 5805 * POLLHUP process or lwp has terminated 5806 */ 5807 static int 5808 prpoll(vnode_t *vp, short events, int anyyet, short *reventsp, 5809 pollhead_t **phpp) 5810 { 5811 prnode_t *pnp = VTOP(vp); 5812 prcommon_t *pcp = pnp->pr_common; 5813 pollhead_t *php = &pcp->prc_pollhead; 5814 proc_t *p; 5815 short revents; 5816 int error; 5817 int lockstate; 5818 5819 ASSERT(pnp->pr_type < PR_NFILES); 5820 5821 /* 5822 * Support for old /proc interface. 5823 */ 5824 if (pnp->pr_pidfile != NULL) { 5825 vp = pnp->pr_pidfile; 5826 pnp = VTOP(vp); 5827 ASSERT(pnp->pr_type == PR_PIDFILE); 5828 ASSERT(pnp->pr_common == pcp); 5829 } 5830 5831 *reventsp = revents = 0; 5832 *phpp = (pollhead_t *)NULL; 5833 5834 if (vp->v_type == VDIR) { 5835 *reventsp |= POLLNVAL; 5836 return (0); 5837 } 5838 5839 lockstate = pollunlock(); /* avoid deadlock with prnotify() */ 5840 5841 if ((error = prlock(pnp, ZNO)) != 0) { 5842 pollrelock(lockstate); 5843 switch (error) { 5844 case ENOENT: /* process or lwp died */ 5845 *reventsp = POLLHUP; 5846 error = 0; 5847 break; 5848 case EAGAIN: /* invalidated */ 5849 *reventsp = POLLERR; 5850 error = 0; 5851 break; 5852 } 5853 return (error); 5854 } 5855 5856 /* 5857 * We have the process marked locked (P_PR_LOCK) and we are holding 5858 * its p->p_lock. We want to unmark the process but retain 5859 * exclusive control w.r.t. other /proc controlling processes 5860 * before reacquiring the polling locks. 5861 * 5862 * prunmark() does this for us. It unmarks the process 5863 * but retains p->p_lock so we still have exclusive control. 5864 * We will drop p->p_lock at the end to relinquish control. 5865 * 5866 * We cannot call prunlock() at the end to relinquish control 5867 * because prunlock(), like prunmark(), may drop and reacquire 5868 * p->p_lock and that would lead to a lock order violation 5869 * w.r.t. the polling locks we are about to reacquire. 5870 */ 5871 p = pcp->prc_proc; 5872 ASSERT(p != NULL); 5873 prunmark(p); 5874 5875 pollrelock(lockstate); /* reacquire dropped poll locks */ 5876 5877 if ((p->p_flag & SSYS) || p->p_as == &kas) 5878 revents = POLLNVAL; 5879 else { 5880 short ev; 5881 5882 if ((ev = (events & (POLLIN|POLLRDNORM))) != 0) 5883 revents |= ev; 5884 /* 5885 * POLLWRNORM (same as POLLOUT) really should not be 5886 * used to indicate that the process or lwp stopped. 5887 * However, USL chose to use POLLWRNORM rather than 5888 * POLLPRI to indicate this, so we just accept either 5889 * requested event to indicate stopped. (grr...) 5890 */ 5891 if ((ev = (events & (POLLPRI|POLLOUT|POLLWRNORM))) != 0) { 5892 kthread_t *t; 5893 5894 if (pcp->prc_flags & PRC_LWP) { 5895 t = pcp->prc_thread; 5896 ASSERT(t != NULL); 5897 thread_lock(t); 5898 } else { 5899 t = prchoose(p); /* returns locked t */ 5900 ASSERT(t != NULL); 5901 } 5902 5903 if (ISTOPPED(t) || VSTOPPED(t)) 5904 revents |= ev; 5905 thread_unlock(t); 5906 } 5907 } 5908 5909 *reventsp = revents; 5910 if (!anyyet && revents == 0) { 5911 /* 5912 * Arrange to wake up the polling lwp when 5913 * the target process/lwp stops or terminates 5914 * or when the file descriptor becomes invalid. 5915 */ 5916 pcp->prc_flags |= PRC_POLL; 5917 *phpp = php; 5918 } 5919 mutex_exit(&p->p_lock); 5920 return (0); 5921 } 5922 5923 /* in prioctl.c */ 5924 extern int prioctl(vnode_t *, int, intptr_t, int, cred_t *, int *); 5925 5926 /* 5927 * /proc vnode operations vector 5928 */ 5929 const fs_operation_def_t pr_vnodeops_template[] = { 5930 VOPNAME_OPEN, propen, 5931 VOPNAME_CLOSE, prclose, 5932 VOPNAME_READ, prread, 5933 VOPNAME_WRITE, prwrite, 5934 VOPNAME_IOCTL, prioctl, 5935 VOPNAME_GETATTR, prgetattr, 5936 VOPNAME_ACCESS, praccess, 5937 VOPNAME_LOOKUP, prlookup, 5938 VOPNAME_CREATE, prcreate, 5939 VOPNAME_READDIR, prreaddir, 5940 VOPNAME_READLINK, prreadlink, 5941 VOPNAME_FSYNC, prfsync, 5942 VOPNAME_INACTIVE, (fs_generic_func_p) prinactive, 5943 VOPNAME_SEEK, prseek, 5944 VOPNAME_CMP, prcmp, 5945 VOPNAME_FRLOCK, fs_error, 5946 VOPNAME_REALVP, prrealvp, 5947 VOPNAME_POLL, (fs_generic_func_p) prpoll, 5948 VOPNAME_DISPOSE, fs_error, 5949 VOPNAME_SHRLOCK, fs_error, 5950 NULL, NULL 5951 }; 5952