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 2009 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 #include <sys/types.h> 31 #include <sys/param.h> 32 #include <sys/time.h> 33 #include <sys/cred.h> 34 #include <sys/policy.h> 35 #include <sys/debug.h> 36 #include <sys/dirent.h> 37 #include <sys/errno.h> 38 #include <sys/file.h> 39 #include <sys/inline.h> 40 #include <sys/kmem.h> 41 #include <sys/pathname.h> 42 #include <sys/proc.h> 43 #include <sys/signal.h> 44 #include <sys/stat.h> 45 #include <sys/sysmacros.h> 46 #include <sys/systm.h> 47 #include <sys/zone.h> 48 #include <sys/uio.h> 49 #include <sys/var.h> 50 #include <sys/mode.h> 51 #include <sys/poll.h> 52 #include <sys/user.h> 53 #include <sys/vfs.h> 54 #include <sys/vfs_opreg.h> 55 #include <sys/gfs.h> 56 #include <sys/vnode.h> 57 #include <sys/fault.h> 58 #include <sys/syscall.h> 59 #include <sys/procfs.h> 60 #include <sys/atomic.h> 61 #include <sys/cmn_err.h> 62 #include <sys/contract_impl.h> 63 #include <sys/ctfs.h> 64 #include <sys/avl.h> 65 #include <fs/fs_subr.h> 66 #include <vm/rm.h> 67 #include <vm/as.h> 68 #include <vm/seg.h> 69 #include <vm/seg_vn.h> 70 #include <vm/hat.h> 71 #include <fs/proc/prdata.h> 72 #if defined(__sparc) 73 #include <sys/regset.h> 74 #endif 75 #if defined(__x86) 76 #include <sys/sysi86.h> 77 #endif 78 79 /* 80 * Created by prinit. 81 */ 82 vnodeops_t *prvnodeops; 83 84 /* 85 * Directory characteristics (patterned after the s5 file system). 86 */ 87 #define PRROOTINO 2 88 89 #define PRDIRSIZE 14 90 struct prdirect { 91 ushort_t d_ino; 92 char d_name[PRDIRSIZE]; 93 }; 94 95 #define PRSDSIZE (sizeof (struct prdirect)) 96 97 /* 98 * Directory characteristics. 99 */ 100 typedef struct prdirent { 101 ino64_t d_ino; /* "inode number" of entry */ 102 off64_t d_off; /* offset of disk directory entry */ 103 unsigned short d_reclen; /* length of this record */ 104 char d_name[14]; /* name of file */ 105 } prdirent_t; 106 107 /* 108 * Contents of a /proc/<pid> directory. 109 * Reuse d_ino field for the /proc file type. 110 */ 111 static prdirent_t piddir[] = { 112 { PR_PIDDIR, 1 * sizeof (prdirent_t), sizeof (prdirent_t), 113 "." }, 114 { PR_PROCDIR, 2 * sizeof (prdirent_t), sizeof (prdirent_t), 115 ".." }, 116 { PR_AS, 3 * sizeof (prdirent_t), sizeof (prdirent_t), 117 "as" }, 118 { PR_CTL, 4 * sizeof (prdirent_t), sizeof (prdirent_t), 119 "ctl" }, 120 { PR_STATUS, 5 * sizeof (prdirent_t), sizeof (prdirent_t), 121 "status" }, 122 { PR_LSTATUS, 6 * sizeof (prdirent_t), sizeof (prdirent_t), 123 "lstatus" }, 124 { PR_PSINFO, 7 * sizeof (prdirent_t), sizeof (prdirent_t), 125 "psinfo" }, 126 { PR_LPSINFO, 8 * sizeof (prdirent_t), sizeof (prdirent_t), 127 "lpsinfo" }, 128 { PR_MAP, 9 * sizeof (prdirent_t), sizeof (prdirent_t), 129 "map" }, 130 { PR_RMAP, 10 * sizeof (prdirent_t), sizeof (prdirent_t), 131 "rmap" }, 132 { PR_XMAP, 11 * sizeof (prdirent_t), sizeof (prdirent_t), 133 "xmap" }, 134 { PR_CRED, 12 * sizeof (prdirent_t), sizeof (prdirent_t), 135 "cred" }, 136 { PR_SIGACT, 13 * sizeof (prdirent_t), sizeof (prdirent_t), 137 "sigact" }, 138 { PR_AUXV, 14 * sizeof (prdirent_t), sizeof (prdirent_t), 139 "auxv" }, 140 { PR_USAGE, 15 * sizeof (prdirent_t), sizeof (prdirent_t), 141 "usage" }, 142 { PR_LUSAGE, 16 * sizeof (prdirent_t), sizeof (prdirent_t), 143 "lusage" }, 144 { PR_PAGEDATA, 17 * sizeof (prdirent_t), sizeof (prdirent_t), 145 "pagedata" }, 146 { PR_WATCH, 18 * sizeof (prdirent_t), sizeof (prdirent_t), 147 "watch" }, 148 { PR_CURDIR, 19 * sizeof (prdirent_t), sizeof (prdirent_t), 149 "cwd" }, 150 { PR_ROOTDIR, 20 * sizeof (prdirent_t), sizeof (prdirent_t), 151 "root" }, 152 { PR_FDDIR, 21 * sizeof (prdirent_t), sizeof (prdirent_t), 153 "fd" }, 154 { PR_OBJECTDIR, 22 * sizeof (prdirent_t), sizeof (prdirent_t), 155 "object" }, 156 { PR_LWPDIR, 23 * sizeof (prdirent_t), sizeof (prdirent_t), 157 "lwp" }, 158 { PR_PRIV, 24 * sizeof (prdirent_t), sizeof (prdirent_t), 159 "priv" }, 160 { PR_PATHDIR, 25 * sizeof (prdirent_t), sizeof (prdirent_t), 161 "path" }, 162 { PR_CTDIR, 26 * sizeof (prdirent_t), sizeof (prdirent_t), 163 "contracts" }, 164 #if defined(__x86) 165 { PR_LDT, 27 * sizeof (prdirent_t), sizeof (prdirent_t), 166 "ldt" }, 167 #endif 168 }; 169 170 #define NPIDDIRFILES (sizeof (piddir) / sizeof (piddir[0]) - 2) 171 172 /* 173 * Contents of a /proc/<pid>/lwp/<lwpid> directory. 174 */ 175 static prdirent_t lwpiddir[] = { 176 { PR_LWPIDDIR, 1 * sizeof (prdirent_t), sizeof (prdirent_t), 177 "." }, 178 { PR_LWPDIR, 2 * sizeof (prdirent_t), sizeof (prdirent_t), 179 ".." }, 180 { PR_LWPCTL, 3 * sizeof (prdirent_t), sizeof (prdirent_t), 181 "lwpctl" }, 182 { PR_LWPSTATUS, 4 * sizeof (prdirent_t), sizeof (prdirent_t), 183 "lwpstatus" }, 184 { PR_LWPSINFO, 5 * sizeof (prdirent_t), sizeof (prdirent_t), 185 "lwpsinfo" }, 186 { PR_LWPUSAGE, 6 * sizeof (prdirent_t), sizeof (prdirent_t), 187 "lwpusage" }, 188 { PR_XREGS, 7 * sizeof (prdirent_t), sizeof (prdirent_t), 189 "xregs" }, 190 { PR_TMPLDIR, 8 * sizeof (prdirent_t), sizeof (prdirent_t), 191 "templates" }, 192 #if defined(__sparc) 193 { PR_GWINDOWS, 9 * sizeof (prdirent_t), sizeof (prdirent_t), 194 "gwindows" }, 195 { PR_ASRS, 10 * sizeof (prdirent_t), sizeof (prdirent_t), 196 "asrs" }, 197 #endif 198 }; 199 200 #define NLWPIDDIRFILES (sizeof (lwpiddir) / sizeof (lwpiddir[0]) - 2) 201 202 /* 203 * Span of entries in the array files (lstatus, lpsinfo, lusage). 204 * We make the span larger than the size of the structure on purpose, 205 * to make sure that programs cannot use the structure size by mistake. 206 * Align _ILP32 structures at 8 bytes, _LP64 structures at 16 bytes. 207 */ 208 #ifdef _LP64 209 #define LSPAN(type) (round16(sizeof (type)) + 16) 210 #define LSPAN32(type) (round8(sizeof (type)) + 8) 211 #else 212 #define LSPAN(type) (round8(sizeof (type)) + 8) 213 #endif 214 215 static void rebuild_objdir(struct as *); 216 static void prfreecommon(prcommon_t *); 217 static int praccess(vnode_t *, int, int, cred_t *, caller_context_t *); 218 219 static int 220 propen(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 221 { 222 vnode_t *vp = *vpp; 223 prnode_t *pnp = VTOP(vp); 224 prcommon_t *pcp = pnp->pr_pcommon; 225 prnodetype_t type = pnp->pr_type; 226 vnode_t *rvp; 227 vtype_t vtype; 228 proc_t *p; 229 int error = 0; 230 prnode_t *npnp = NULL; 231 232 /* 233 * Nothing to do for the /proc directory itself. 234 */ 235 if (type == PR_PROCDIR) 236 return (0); 237 238 /* 239 * If we are opening an underlying mapped object, reject opens 240 * for writing regardless of the objects's access modes. 241 * If we are opening a file in the /proc/pid/fd directory, 242 * reject the open for any but a regular file or directory. 243 * Just do it if we are opening the current or root directory. 244 */ 245 switch (type) { 246 case PR_OBJECT: 247 case PR_FD: 248 case PR_CURDIR: 249 case PR_ROOTDIR: 250 rvp = pnp->pr_realvp; 251 vtype = rvp->v_type; 252 if ((type == PR_OBJECT && (flag & FWRITE)) || 253 (type == PR_FD && vtype != VREG && vtype != VDIR)) 254 error = EACCES; 255 else { 256 /* 257 * Need to hold rvp since VOP_OPEN() may release it. 258 */ 259 VN_HOLD(rvp); 260 error = VOP_OPEN(&rvp, flag, cr, ct); 261 if (error) { 262 VN_RELE(rvp); 263 } else { 264 *vpp = rvp; 265 VN_RELE(vp); 266 } 267 } 268 return (error); 269 default: 270 break; 271 } 272 273 /* 274 * If we are opening the pagedata file, allocate a prnode now 275 * to avoid calling kmem_alloc() while holding p->p_lock. 276 */ 277 if (type == PR_PAGEDATA || type == PR_OPAGEDATA) 278 npnp = prgetnode(vp, type); 279 280 /* 281 * If the process exists, lock it now. 282 * Otherwise we have a race condition with prclose(). 283 */ 284 p = pr_p_lock(pnp); 285 mutex_exit(&pr_pidlock); 286 if (p == NULL) { 287 if (npnp != NULL) 288 prfreenode(npnp); 289 return (ENOENT); 290 } 291 ASSERT(p == pcp->prc_proc); 292 ASSERT(p->p_proc_flag & P_PR_LOCK); 293 294 /* 295 * Maintain a count of opens for write. Allow exactly one 296 * O_WRITE|O_EXCL request and fail subsequent ones. 297 * Don't fail opens of old (bletch!) /proc lwp files. 298 * Special case for open by the process itself: 299 * Always allow the open by self and discount this 300 * open for other opens for writing. 301 */ 302 if (flag & FWRITE) { 303 if (p == curproc) { 304 pcp->prc_selfopens++; 305 pnp->pr_flags |= PR_ISSELF; 306 } else if (type == PR_LWPIDFILE) { 307 /* EMPTY */; 308 } else if (flag & FEXCL) { 309 if (pcp->prc_writers > pcp->prc_selfopens) { 310 error = EBUSY; 311 goto out; 312 } 313 /* semantic for old /proc interface */ 314 if (type == PR_PIDDIR) 315 pcp->prc_flags |= PRC_EXCL; 316 } else if (pcp->prc_flags & PRC_EXCL) { 317 ASSERT(pcp->prc_writers > pcp->prc_selfopens); 318 error = secpolicy_proc_excl_open(cr); 319 if (error) 320 goto out; 321 } 322 pcp->prc_writers++; 323 /* 324 * The vnode may have become invalid between the 325 * VOP_LOOKUP() of the /proc vnode and the VOP_OPEN(). 326 * If so, do now what prinvalidate() should have done. 327 */ 328 if ((pnp->pr_flags & PR_INVAL) || 329 (type == PR_PIDDIR && 330 (VTOP(pnp->pr_pidfile)->pr_flags & PR_INVAL))) { 331 if (p != curproc) 332 pcp->prc_selfopens++; 333 ASSERT(pcp->prc_selfopens <= pcp->prc_writers); 334 if (pcp->prc_selfopens == pcp->prc_writers) 335 pcp->prc_flags &= ~PRC_EXCL; 336 } 337 } 338 339 /* 340 * Do file-specific things. 341 */ 342 switch (type) { 343 default: 344 break; 345 case PR_PAGEDATA: 346 case PR_OPAGEDATA: 347 /* 348 * Enable data collection for page data file; 349 * get unique id from the hat layer. 350 */ 351 { 352 int id; 353 354 /* 355 * Drop p->p_lock to call hat_startstat() 356 */ 357 mutex_exit(&p->p_lock); 358 if ((p->p_flag & SSYS) || p->p_as == &kas || 359 (id = hat_startstat(p->p_as)) == -1) { 360 mutex_enter(&p->p_lock); 361 error = ENOMEM; 362 } else if (pnp->pr_hatid == 0) { 363 mutex_enter(&p->p_lock); 364 pnp->pr_hatid = (uint_t)id; 365 } else { 366 mutex_enter(&p->p_lock); 367 /* 368 * Use our newly allocated prnode. 369 */ 370 npnp->pr_hatid = (uint_t)id; 371 /* 372 * prgetnode() initialized most of the prnode. 373 * Duplicate the remainder. 374 */ 375 npnp->pr_ino = pnp->pr_ino; 376 npnp->pr_common = pnp->pr_common; 377 npnp->pr_pcommon = pnp->pr_pcommon; 378 npnp->pr_parent = pnp->pr_parent; 379 VN_HOLD(npnp->pr_parent); 380 npnp->pr_index = pnp->pr_index; 381 382 npnp->pr_next = p->p_plist; 383 p->p_plist = PTOV(npnp); 384 385 VN_RELE(PTOV(pnp)); 386 pnp = npnp; 387 npnp = NULL; 388 *vpp = PTOV(pnp); 389 } 390 } 391 break; 392 } 393 394 out: 395 prunlock(pnp); 396 397 if (npnp != NULL) 398 prfreenode(npnp); 399 return (error); 400 } 401 402 /* ARGSUSED */ 403 static int 404 prclose(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 405 caller_context_t *ct) 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 caller_context_t *ct) 2696 { 2697 prnode_t *pnp = VTOP(vp); 2698 prnodetype_t type = pnp->pr_type; 2699 prcommon_t *pcp; 2700 proc_t *p; 2701 struct as *as; 2702 int error; 2703 vnode_t *rvp; 2704 timestruc_t now; 2705 extern uint_t nproc; 2706 int ngroups; 2707 2708 /* 2709 * This ugly bit of code allows us to keep both versions of this 2710 * function from the same source. 2711 */ 2712 #ifdef _LP64 2713 int iam32bit = (curproc->p_model == DATAMODEL_ILP32); 2714 #define PR_OBJSIZE(obj32, obj64) \ 2715 (iam32bit ? sizeof (obj32) : sizeof (obj64)) 2716 #define PR_OBJSPAN(obj32, obj64) \ 2717 (iam32bit ? LSPAN32(obj32) : LSPAN(obj64)) 2718 #else 2719 #define PR_OBJSIZE(obj32, obj64) \ 2720 (sizeof (obj64)) 2721 #define PR_OBJSPAN(obj32, obj64) \ 2722 (LSPAN(obj64)) 2723 #endif 2724 2725 /* 2726 * Return all the attributes. Should be refined 2727 * so that it returns only those asked for. 2728 * Most of this is complete fakery anyway. 2729 */ 2730 2731 /* 2732 * For files in the /proc/<pid>/object directory, 2733 * return the attributes of the underlying object. 2734 * For files in the /proc/<pid>/fd directory, 2735 * return the attributes of the underlying file, but 2736 * make it look inaccessible if it is not a regular file. 2737 * Make directories look like symlinks. 2738 */ 2739 switch (type) { 2740 case PR_CURDIR: 2741 case PR_ROOTDIR: 2742 if (!(flags & ATTR_REAL)) 2743 break; 2744 /* restrict full knowledge of the attributes to owner or root */ 2745 if ((error = praccess(vp, 0, 0, cr, ct)) != 0) 2746 return (error); 2747 /* FALLTHROUGH */ 2748 case PR_OBJECT: 2749 case PR_FD: 2750 rvp = pnp->pr_realvp; 2751 error = VOP_GETATTR(rvp, vap, flags, cr, ct); 2752 if (error) 2753 return (error); 2754 if (type == PR_FD) { 2755 if (rvp->v_type != VREG && rvp->v_type != VDIR) 2756 vap->va_mode = 0; 2757 else 2758 vap->va_mode &= pnp->pr_mode; 2759 } 2760 if (type == PR_OBJECT) 2761 vap->va_mode &= 07555; 2762 if (rvp->v_type == VDIR && !(flags & ATTR_REAL)) { 2763 vap->va_type = VLNK; 2764 vap->va_size = 0; 2765 vap->va_nlink = 1; 2766 } 2767 return (0); 2768 default: 2769 break; 2770 } 2771 2772 bzero(vap, sizeof (*vap)); 2773 /* 2774 * Large Files: Internally proc now uses VPROC to indicate 2775 * a proc file. Since we have been returning VREG through 2776 * VOP_GETATTR() until now, we continue to do this so as 2777 * not to break apps depending on this return value. 2778 */ 2779 vap->va_type = (vp->v_type == VPROC) ? VREG : vp->v_type; 2780 vap->va_mode = pnp->pr_mode; 2781 vap->va_fsid = vp->v_vfsp->vfs_dev; 2782 vap->va_blksize = DEV_BSIZE; 2783 vap->va_rdev = 0; 2784 vap->va_seq = 0; 2785 2786 if (type == PR_PROCDIR) { 2787 vap->va_uid = 0; 2788 vap->va_gid = 0; 2789 vap->va_nlink = nproc + 2; 2790 vap->va_nodeid = (ino64_t)PRROOTINO; 2791 gethrestime(&now); 2792 vap->va_atime = vap->va_mtime = vap->va_ctime = now; 2793 vap->va_size = (v.v_proc + 2) * PRSDSIZE; 2794 vap->va_nblocks = btod(vap->va_size); 2795 return (0); 2796 } 2797 2798 /* 2799 * /proc/<pid>/self is a symbolic link, and has no prcommon member 2800 */ 2801 if (type == PR_SELF) { 2802 vap->va_uid = crgetruid(CRED()); 2803 vap->va_gid = crgetrgid(CRED()); 2804 vap->va_nodeid = (ino64_t)PR_SELF; 2805 gethrestime(&now); 2806 vap->va_atime = vap->va_mtime = vap->va_ctime = now; 2807 vap->va_nlink = 1; 2808 vap->va_type = VLNK; 2809 vap->va_size = 0; 2810 return (0); 2811 } 2812 2813 p = pr_p_lock(pnp); 2814 mutex_exit(&pr_pidlock); 2815 if (p == NULL) 2816 return (ENOENT); 2817 pcp = pnp->pr_common; 2818 2819 mutex_enter(&p->p_crlock); 2820 vap->va_uid = crgetruid(p->p_cred); 2821 vap->va_gid = crgetrgid(p->p_cred); 2822 mutex_exit(&p->p_crlock); 2823 2824 vap->va_nlink = 1; 2825 vap->va_nodeid = pnp->pr_ino? pnp->pr_ino : 2826 pmkino(pcp->prc_tslot, pcp->prc_slot, pnp->pr_type); 2827 if ((pcp->prc_flags & PRC_LWP) && pcp->prc_tslot != -1) { 2828 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = 2829 vap->va_ctime.tv_sec = 2830 p->p_lwpdir[pcp->prc_tslot].ld_entry->le_start; 2831 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = 2832 vap->va_ctime.tv_nsec = 0; 2833 } else { 2834 user_t *up = PTOU(p); 2835 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = 2836 vap->va_ctime.tv_sec = up->u_start.tv_sec; 2837 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = 2838 vap->va_ctime.tv_nsec = up->u_start.tv_nsec; 2839 } 2840 2841 switch (type) { 2842 case PR_PIDDIR: 2843 /* va_nlink: count 'lwp', 'object' and 'fd' directory links */ 2844 vap->va_nlink = 5; 2845 vap->va_size = sizeof (piddir); 2846 break; 2847 case PR_OBJECTDIR: 2848 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2849 vap->va_size = 2 * PRSDSIZE; 2850 else { 2851 mutex_exit(&p->p_lock); 2852 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 2853 if (as->a_updatedir) 2854 rebuild_objdir(as); 2855 vap->va_size = (as->a_sizedir + 2) * PRSDSIZE; 2856 AS_LOCK_EXIT(as, &as->a_lock); 2857 mutex_enter(&p->p_lock); 2858 } 2859 vap->va_nlink = 2; 2860 break; 2861 case PR_PATHDIR: 2862 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2863 vap->va_size = (P_FINFO(p)->fi_nfiles + 4) * PRSDSIZE; 2864 else { 2865 mutex_exit(&p->p_lock); 2866 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 2867 if (as->a_updatedir) 2868 rebuild_objdir(as); 2869 vap->va_size = (as->a_sizedir + 4 + 2870 P_FINFO(p)->fi_nfiles) * PRSDSIZE; 2871 AS_LOCK_EXIT(as, &as->a_lock); 2872 mutex_enter(&p->p_lock); 2873 } 2874 vap->va_nlink = 2; 2875 break; 2876 case PR_PATH: 2877 case PR_CURDIR: 2878 case PR_ROOTDIR: 2879 case PR_CT: 2880 vap->va_type = VLNK; 2881 vap->va_size = 0; 2882 break; 2883 case PR_FDDIR: 2884 vap->va_nlink = 2; 2885 vap->va_size = (P_FINFO(p)->fi_nfiles + 2) * PRSDSIZE; 2886 break; 2887 case PR_LWPDIR: 2888 /* 2889 * va_nlink: count each lwp as a directory link. 2890 * va_size: size of p_lwpdir + 2 2891 */ 2892 vap->va_nlink = p->p_lwpcnt + p->p_zombcnt + 2; 2893 vap->va_size = (p->p_lwpdir_sz + 2) * PRSDSIZE; 2894 break; 2895 case PR_LWPIDDIR: 2896 vap->va_nlink = 2; 2897 vap->va_size = sizeof (lwpiddir); 2898 break; 2899 case PR_CTDIR: 2900 vap->va_nlink = 2; 2901 vap->va_size = (avl_numnodes(&p->p_ct_held) + 2) * PRSDSIZE; 2902 break; 2903 case PR_TMPLDIR: 2904 vap->va_nlink = 2; 2905 vap->va_size = (ct_ntypes + 2) * PRSDSIZE; 2906 break; 2907 case PR_AS: 2908 case PR_PIDFILE: 2909 case PR_LWPIDFILE: 2910 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2911 vap->va_size = 0; 2912 else { 2913 mutex_exit(&p->p_lock); 2914 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 2915 vap->va_size = rm_assize(as); 2916 AS_LOCK_EXIT(as, &as->a_lock); 2917 mutex_enter(&p->p_lock); 2918 } 2919 break; 2920 case PR_STATUS: 2921 vap->va_size = PR_OBJSIZE(pstatus32_t, pstatus_t); 2922 break; 2923 case PR_LSTATUS: 2924 vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + 2925 p->p_lwpcnt * PR_OBJSPAN(lwpstatus32_t, lwpstatus_t); 2926 break; 2927 case PR_PSINFO: 2928 vap->va_size = PR_OBJSIZE(psinfo32_t, psinfo_t); 2929 break; 2930 case PR_LPSINFO: 2931 vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + 2932 (p->p_lwpcnt + p->p_zombcnt) * 2933 PR_OBJSPAN(lwpsinfo32_t, lwpsinfo_t); 2934 break; 2935 case PR_MAP: 2936 case PR_RMAP: 2937 case PR_XMAP: 2938 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2939 vap->va_size = 0; 2940 else { 2941 mutex_exit(&p->p_lock); 2942 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 2943 if (type == PR_MAP) 2944 vap->va_mtime = as->a_updatetime; 2945 if (type == PR_XMAP) 2946 vap->va_size = prnsegs(as, 0) * 2947 PR_OBJSIZE(prxmap32_t, prxmap_t); 2948 else 2949 vap->va_size = prnsegs(as, type == PR_RMAP) * 2950 PR_OBJSIZE(prmap32_t, prmap_t); 2951 AS_LOCK_EXIT(as, &as->a_lock); 2952 mutex_enter(&p->p_lock); 2953 } 2954 break; 2955 case PR_CRED: 2956 mutex_enter(&p->p_crlock); 2957 vap->va_size = sizeof (prcred_t); 2958 ngroups = crgetngroups(p->p_cred); 2959 if (ngroups > 1) 2960 vap->va_size += (ngroups - 1) * sizeof (gid_t); 2961 mutex_exit(&p->p_crlock); 2962 break; 2963 case PR_PRIV: 2964 vap->va_size = prgetprivsize(); 2965 break; 2966 case PR_SIGACT: 2967 vap->va_size = (NSIG-1) * 2968 PR_OBJSIZE(struct sigaction32, struct sigaction); 2969 break; 2970 case PR_AUXV: 2971 vap->va_size = __KERN_NAUXV_IMPL * PR_OBJSIZE(auxv32_t, auxv_t); 2972 break; 2973 #if defined(__x86) 2974 case PR_LDT: 2975 mutex_exit(&p->p_lock); 2976 mutex_enter(&p->p_ldtlock); 2977 vap->va_size = prnldt(p) * sizeof (struct ssd); 2978 mutex_exit(&p->p_ldtlock); 2979 mutex_enter(&p->p_lock); 2980 break; 2981 #endif 2982 case PR_USAGE: 2983 vap->va_size = PR_OBJSIZE(prusage32_t, prusage_t); 2984 break; 2985 case PR_LUSAGE: 2986 vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + 2987 (p->p_lwpcnt + 1) * PR_OBJSPAN(prusage32_t, prusage_t); 2988 break; 2989 case PR_PAGEDATA: 2990 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 2991 vap->va_size = 0; 2992 else { 2993 /* 2994 * We can drop p->p_lock before grabbing the 2995 * address space lock because p->p_as will not 2996 * change while the process is marked P_PR_LOCK. 2997 */ 2998 mutex_exit(&p->p_lock); 2999 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 3000 #ifdef _LP64 3001 vap->va_size = iam32bit? 3002 prpdsize32(as) : prpdsize(as); 3003 #else 3004 vap->va_size = prpdsize(as); 3005 #endif 3006 AS_LOCK_EXIT(as, &as->a_lock); 3007 mutex_enter(&p->p_lock); 3008 } 3009 break; 3010 case PR_OPAGEDATA: 3011 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) 3012 vap->va_size = 0; 3013 else { 3014 mutex_exit(&p->p_lock); 3015 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 3016 #ifdef _LP64 3017 vap->va_size = iam32bit? 3018 oprpdsize32(as) : oprpdsize(as); 3019 #else 3020 vap->va_size = oprpdsize(as); 3021 #endif 3022 AS_LOCK_EXIT(as, &as->a_lock); 3023 mutex_enter(&p->p_lock); 3024 } 3025 break; 3026 case PR_WATCH: 3027 vap->va_size = avl_numnodes(&p->p_warea) * 3028 PR_OBJSIZE(prwatch32_t, prwatch_t); 3029 break; 3030 case PR_LWPSTATUS: 3031 vap->va_size = PR_OBJSIZE(lwpstatus32_t, lwpstatus_t); 3032 break; 3033 case PR_LWPSINFO: 3034 vap->va_size = PR_OBJSIZE(lwpsinfo32_t, lwpsinfo_t); 3035 break; 3036 case PR_LWPUSAGE: 3037 vap->va_size = PR_OBJSIZE(prusage32_t, prusage_t); 3038 break; 3039 case PR_XREGS: 3040 if (prhasx(p)) 3041 vap->va_size = prgetprxregsize(p); 3042 else 3043 vap->va_size = 0; 3044 break; 3045 #if defined(__sparc) 3046 case PR_GWINDOWS: 3047 { 3048 kthread_t *t; 3049 int n; 3050 3051 /* 3052 * If there is no lwp then just make the size zero. 3053 * This can happen if the lwp exits between the VOP_LOOKUP() 3054 * of the /proc/<pid>/lwp/<lwpid>/gwindows file and the 3055 * VOP_GETATTR() of the resulting vnode. 3056 */ 3057 if ((t = pcp->prc_thread) == NULL) { 3058 vap->va_size = 0; 3059 break; 3060 } 3061 /* 3062 * Drop p->p_lock while touching the stack. 3063 * The P_PR_LOCK flag prevents the lwp from 3064 * disappearing while we do this. 3065 */ 3066 mutex_exit(&p->p_lock); 3067 if ((n = prnwindows(ttolwp(t))) == 0) 3068 vap->va_size = 0; 3069 else 3070 vap->va_size = PR_OBJSIZE(gwindows32_t, gwindows_t) - 3071 (SPARC_MAXREGWINDOW - n) * 3072 PR_OBJSIZE(struct rwindow32, struct rwindow); 3073 mutex_enter(&p->p_lock); 3074 break; 3075 } 3076 case PR_ASRS: 3077 #ifdef _LP64 3078 if (p->p_model == DATAMODEL_LP64) 3079 vap->va_size = sizeof (asrset_t); 3080 else 3081 #endif 3082 vap->va_size = 0; 3083 break; 3084 #endif 3085 case PR_CTL: 3086 case PR_LWPCTL: 3087 default: 3088 vap->va_size = 0; 3089 break; 3090 } 3091 3092 prunlock(pnp); 3093 vap->va_nblocks = (fsblkcnt64_t)btod(vap->va_size); 3094 return (0); 3095 } 3096 3097 static int 3098 praccess(vnode_t *vp, int mode, int flags, cred_t *cr, caller_context_t *ct) 3099 { 3100 prnode_t *pnp = VTOP(vp); 3101 prnodetype_t type = pnp->pr_type; 3102 int vmode; 3103 vtype_t vtype; 3104 proc_t *p; 3105 int error = 0; 3106 vnode_t *rvp; 3107 vnode_t *xvp; 3108 3109 if ((mode & VWRITE) && vn_is_readonly(vp)) 3110 return (EROFS); 3111 3112 switch (type) { 3113 case PR_PROCDIR: 3114 break; 3115 3116 case PR_OBJECT: 3117 case PR_FD: 3118 /* 3119 * Disallow write access to the underlying objects. 3120 * Disallow access to underlying non-regular-file fds. 3121 * Disallow access to fds with other than existing open modes. 3122 */ 3123 rvp = pnp->pr_realvp; 3124 vtype = rvp->v_type; 3125 vmode = pnp->pr_mode; 3126 if ((type == PR_OBJECT && (mode & VWRITE)) || 3127 (type == PR_FD && vtype != VREG && vtype != VDIR) || 3128 (type == PR_FD && (vmode & mode) != mode && 3129 secpolicy_proc_access(cr) != 0)) 3130 return (EACCES); 3131 return (VOP_ACCESS(rvp, mode, flags, cr, ct)); 3132 3133 case PR_PSINFO: /* these files can be read by anyone */ 3134 case PR_LPSINFO: 3135 case PR_LWPSINFO: 3136 case PR_LWPDIR: 3137 case PR_LWPIDDIR: 3138 case PR_USAGE: 3139 case PR_LUSAGE: 3140 case PR_LWPUSAGE: 3141 p = pr_p_lock(pnp); 3142 mutex_exit(&pr_pidlock); 3143 if (p == NULL) 3144 return (ENOENT); 3145 prunlock(pnp); 3146 break; 3147 3148 default: 3149 /* 3150 * Except for the world-readable files above, 3151 * only /proc/pid exists if the process is a zombie. 3152 */ 3153 if ((error = prlock(pnp, 3154 (type == PR_PIDDIR)? ZYES : ZNO)) != 0) 3155 return (error); 3156 p = pnp->pr_common->prc_proc; 3157 if (p != curproc) 3158 error = priv_proc_cred_perm(cr, p, NULL, mode); 3159 3160 if (error != 0 || p == curproc || (p->p_flag & SSYS) || 3161 p->p_as == &kas || (xvp = p->p_exec) == NULL) { 3162 prunlock(pnp); 3163 } else { 3164 /* 3165 * Determine if the process's executable is readable. 3166 * We have to drop p->p_lock before the secpolicy 3167 * and VOP operation. 3168 */ 3169 VN_HOLD(xvp); 3170 prunlock(pnp); 3171 if (secpolicy_proc_access(cr) != 0) 3172 error = VOP_ACCESS(xvp, VREAD, 0, cr, ct); 3173 VN_RELE(xvp); 3174 } 3175 if (error) 3176 return (error); 3177 break; 3178 } 3179 3180 if (type == PR_CURDIR || type == PR_ROOTDIR) { 3181 /* 3182 * Final access check on the underlying directory vnode. 3183 */ 3184 return (VOP_ACCESS(pnp->pr_realvp, mode, flags, cr, ct)); 3185 } 3186 3187 /* 3188 * Visceral revulsion: For compatibility with old /proc, 3189 * allow the /proc/<pid> directory to be opened for writing. 3190 */ 3191 vmode = pnp->pr_mode; 3192 if (type == PR_PIDDIR) 3193 vmode |= VWRITE; 3194 if ((vmode & mode) != mode) 3195 error = secpolicy_proc_access(cr); 3196 return (error); 3197 } 3198 3199 /* 3200 * Array of lookup functions, indexed by /proc file type. 3201 */ 3202 static vnode_t *pr_lookup_notdir(), *pr_lookup_procdir(), *pr_lookup_piddir(), 3203 *pr_lookup_objectdir(), *pr_lookup_lwpdir(), *pr_lookup_lwpiddir(), 3204 *pr_lookup_fddir(), *pr_lookup_pathdir(), *pr_lookup_tmpldir(), 3205 *pr_lookup_ctdir(); 3206 3207 static vnode_t *(*pr_lookup_function[PR_NFILES])() = { 3208 pr_lookup_procdir, /* /proc */ 3209 pr_lookup_notdir, /* /proc/self */ 3210 pr_lookup_piddir, /* /proc/<pid> */ 3211 pr_lookup_notdir, /* /proc/<pid>/as */ 3212 pr_lookup_notdir, /* /proc/<pid>/ctl */ 3213 pr_lookup_notdir, /* /proc/<pid>/status */ 3214 pr_lookup_notdir, /* /proc/<pid>/lstatus */ 3215 pr_lookup_notdir, /* /proc/<pid>/psinfo */ 3216 pr_lookup_notdir, /* /proc/<pid>/lpsinfo */ 3217 pr_lookup_notdir, /* /proc/<pid>/map */ 3218 pr_lookup_notdir, /* /proc/<pid>/rmap */ 3219 pr_lookup_notdir, /* /proc/<pid>/xmap */ 3220 pr_lookup_notdir, /* /proc/<pid>/cred */ 3221 pr_lookup_notdir, /* /proc/<pid>/sigact */ 3222 pr_lookup_notdir, /* /proc/<pid>/auxv */ 3223 #if defined(__x86) 3224 pr_lookup_notdir, /* /proc/<pid>/ldt */ 3225 #endif 3226 pr_lookup_notdir, /* /proc/<pid>/usage */ 3227 pr_lookup_notdir, /* /proc/<pid>/lusage */ 3228 pr_lookup_notdir, /* /proc/<pid>/pagedata */ 3229 pr_lookup_notdir, /* /proc/<pid>/watch */ 3230 pr_lookup_notdir, /* /proc/<pid>/cwd */ 3231 pr_lookup_notdir, /* /proc/<pid>/root */ 3232 pr_lookup_fddir, /* /proc/<pid>/fd */ 3233 pr_lookup_notdir, /* /proc/<pid>/fd/nn */ 3234 pr_lookup_objectdir, /* /proc/<pid>/object */ 3235 pr_lookup_notdir, /* /proc/<pid>/object/xxx */ 3236 pr_lookup_lwpdir, /* /proc/<pid>/lwp */ 3237 pr_lookup_lwpiddir, /* /proc/<pid>/lwp/<lwpid> */ 3238 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 3239 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 3240 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpsinfo */ 3241 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpusage */ 3242 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/xregs */ 3243 pr_lookup_tmpldir, /* /proc/<pid>/lwp/<lwpid>/templates */ 3244 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/templates/<id> */ 3245 #if defined(__sparc) 3246 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/gwindows */ 3247 pr_lookup_notdir, /* /proc/<pid>/lwp/<lwpid>/asrs */ 3248 #endif 3249 pr_lookup_notdir, /* /proc/<pid>/priv */ 3250 pr_lookup_pathdir, /* /proc/<pid>/path */ 3251 pr_lookup_notdir, /* /proc/<pid>/path/xxx */ 3252 pr_lookup_ctdir, /* /proc/<pid>/contracts */ 3253 pr_lookup_notdir, /* /proc/<pid>/contracts/<ctid> */ 3254 pr_lookup_notdir, /* old process file */ 3255 pr_lookup_notdir, /* old lwp file */ 3256 pr_lookup_notdir, /* old pagedata file */ 3257 }; 3258 3259 static int 3260 prlookup(vnode_t *dp, char *comp, vnode_t **vpp, pathname_t *pathp, 3261 int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 3262 int *direntflags, pathname_t *realpnp) 3263 { 3264 prnode_t *pnp = VTOP(dp); 3265 prnodetype_t type = pnp->pr_type; 3266 int error; 3267 3268 ASSERT(dp->v_type == VDIR); 3269 ASSERT(type < PR_NFILES); 3270 3271 if (type != PR_PROCDIR && strcmp(comp, "..") == 0) { 3272 VN_HOLD(pnp->pr_parent); 3273 *vpp = pnp->pr_parent; 3274 return (0); 3275 } 3276 3277 if (*comp == '\0' || 3278 strcmp(comp, ".") == 0 || strcmp(comp, "..") == 0) { 3279 VN_HOLD(dp); 3280 *vpp = dp; 3281 return (0); 3282 } 3283 3284 switch (type) { 3285 case PR_CURDIR: 3286 case PR_ROOTDIR: 3287 /* restrict lookup permission to owner or root */ 3288 if ((error = praccess(dp, VEXEC, 0, cr, ct)) != 0) 3289 return (error); 3290 /* FALLTHROUGH */ 3291 case PR_FD: 3292 dp = pnp->pr_realvp; 3293 return (VOP_LOOKUP(dp, comp, vpp, pathp, flags, rdir, cr, ct, 3294 direntflags, realpnp)); 3295 default: 3296 break; 3297 } 3298 3299 if ((type == PR_OBJECTDIR || type == PR_FDDIR || type == PR_PATHDIR) && 3300 (error = praccess(dp, VEXEC, 0, cr, ct)) != 0) 3301 return (error); 3302 3303 /* XXX - Do we need to pass ct, direntflags, or realpnp? */ 3304 *vpp = (pr_lookup_function[type](dp, comp)); 3305 3306 return ((*vpp == NULL) ? ENOENT : 0); 3307 } 3308 3309 /* ARGSUSED */ 3310 static int 3311 prcreate(vnode_t *dp, char *comp, vattr_t *vap, vcexcl_t excl, 3312 int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, 3313 vsecattr_t *vsecp) 3314 { 3315 int error; 3316 3317 if ((error = prlookup(dp, comp, vpp, NULL, 0, NULL, cr, 3318 ct, NULL, NULL)) != 0) { 3319 if (error == ENOENT) /* can't O_CREAT nonexistent files */ 3320 error = EACCES; /* unwriteable directories */ 3321 } else { 3322 if (excl == EXCL) /* O_EXCL */ 3323 error = EEXIST; 3324 else if (vap->va_mask & AT_SIZE) { /* O_TRUNC */ 3325 vnode_t *vp = *vpp; 3326 uint_t mask; 3327 3328 if (vp->v_type == VDIR) 3329 error = EISDIR; 3330 else if (vp->v_type != VPROC || 3331 VTOP(vp)->pr_type != PR_FD) 3332 error = EACCES; 3333 else { /* /proc/<pid>/fd/<n> */ 3334 vp = VTOP(vp)->pr_realvp; 3335 mask = vap->va_mask; 3336 vap->va_mask = AT_SIZE; 3337 error = VOP_SETATTR(vp, vap, 0, cr, ct); 3338 vap->va_mask = mask; 3339 } 3340 } 3341 if (error) { 3342 VN_RELE(*vpp); 3343 *vpp = NULL; 3344 } 3345 } 3346 return (error); 3347 } 3348 3349 /* ARGSUSED */ 3350 static vnode_t * 3351 pr_lookup_notdir(vnode_t *dp, char *comp) 3352 { 3353 return (NULL); 3354 } 3355 3356 /* 3357 * Find or construct a process vnode for the given pid. 3358 */ 3359 static vnode_t * 3360 pr_lookup_procdir(vnode_t *dp, char *comp) 3361 { 3362 pid_t pid; 3363 prnode_t *pnp; 3364 prcommon_t *pcp; 3365 vnode_t *vp; 3366 proc_t *p; 3367 int c; 3368 3369 ASSERT(VTOP(dp)->pr_type == PR_PROCDIR); 3370 3371 if (strcmp(comp, "self") == 0) { 3372 pnp = prgetnode(dp, PR_SELF); 3373 return (PTOV(pnp)); 3374 } else { 3375 pid = 0; 3376 while ((c = *comp++) != '\0') { 3377 if (c < '0' || c > '9') 3378 return (NULL); 3379 pid = 10*pid + c - '0'; 3380 if (pid > maxpid) 3381 return (NULL); 3382 } 3383 } 3384 3385 pnp = prgetnode(dp, PR_PIDDIR); 3386 3387 mutex_enter(&pidlock); 3388 if ((p = prfind(pid)) == NULL || p->p_stat == SIDL) { 3389 mutex_exit(&pidlock); 3390 prfreenode(pnp); 3391 return (NULL); 3392 } 3393 ASSERT(p->p_stat != 0); 3394 3395 /* NOTE: we're holding pidlock across the policy call. */ 3396 if (secpolicy_basic_procinfo(CRED(), p, curproc) != 0) { 3397 mutex_exit(&pidlock); 3398 prfreenode(pnp); 3399 return (NULL); 3400 } 3401 3402 mutex_enter(&p->p_lock); 3403 mutex_exit(&pidlock); 3404 3405 /* 3406 * If a process vnode already exists and it is not invalid 3407 * and it was created by the current process and it belongs 3408 * to the same /proc mount point as our parent vnode, then 3409 * just use it and discard the newly-allocated prnode. 3410 */ 3411 for (vp = p->p_trace; vp != NULL; vp = VTOP(vp)->pr_next) { 3412 if (!(VTOP(VTOP(vp)->pr_pidfile)->pr_flags & PR_INVAL) && 3413 VTOP(vp)->pr_owner == curproc && 3414 vp->v_vfsp == dp->v_vfsp) { 3415 ASSERT(!(VTOP(vp)->pr_flags & PR_INVAL)); 3416 VN_HOLD(vp); 3417 prfreenode(pnp); 3418 mutex_exit(&p->p_lock); 3419 return (vp); 3420 } 3421 } 3422 pnp->pr_owner = curproc; 3423 3424 /* 3425 * prgetnode() initialized most of the prnode. 3426 * Finish the job. 3427 */ 3428 pcp = pnp->pr_common; /* the newly-allocated prcommon struct */ 3429 if ((vp = p->p_trace) != NULL) { 3430 /* discard the new prcommon and use the existing prcommon */ 3431 prfreecommon(pcp); 3432 pcp = VTOP(vp)->pr_common; 3433 mutex_enter(&pcp->prc_mutex); 3434 ASSERT(pcp->prc_refcnt > 0); 3435 pcp->prc_refcnt++; 3436 mutex_exit(&pcp->prc_mutex); 3437 pnp->pr_common = pcp; 3438 } else { 3439 /* initialize the new prcommon struct */ 3440 if ((p->p_flag & SSYS) || p->p_as == &kas) 3441 pcp->prc_flags |= PRC_SYS; 3442 if (p->p_stat == SZOMB) 3443 pcp->prc_flags |= PRC_DESTROY; 3444 pcp->prc_proc = p; 3445 pcp->prc_datamodel = p->p_model; 3446 pcp->prc_pid = p->p_pid; 3447 pcp->prc_slot = p->p_slot; 3448 } 3449 pnp->pr_pcommon = pcp; 3450 pnp->pr_parent = dp; 3451 VN_HOLD(dp); 3452 /* 3453 * Link in the old, invalid directory vnode so we 3454 * can later determine the last close of the file. 3455 */ 3456 pnp->pr_next = p->p_trace; 3457 p->p_trace = dp = PTOV(pnp); 3458 3459 /* 3460 * Kludge for old /proc: initialize the PR_PIDFILE as well. 3461 */ 3462 vp = pnp->pr_pidfile; 3463 pnp = VTOP(vp); 3464 pnp->pr_ino = ptoi(pcp->prc_pid); 3465 pnp->pr_common = pcp; 3466 pnp->pr_pcommon = pcp; 3467 pnp->pr_parent = dp; 3468 pnp->pr_next = p->p_plist; 3469 p->p_plist = vp; 3470 3471 mutex_exit(&p->p_lock); 3472 return (dp); 3473 } 3474 3475 static vnode_t * 3476 pr_lookup_piddir(vnode_t *dp, char *comp) 3477 { 3478 prnode_t *dpnp = VTOP(dp); 3479 vnode_t *vp; 3480 prnode_t *pnp; 3481 proc_t *p; 3482 user_t *up; 3483 prdirent_t *dirp; 3484 int i; 3485 enum prnodetype type; 3486 3487 ASSERT(dpnp->pr_type == PR_PIDDIR); 3488 3489 for (i = 0; i < NPIDDIRFILES; i++) { 3490 /* Skip "." and ".." */ 3491 dirp = &piddir[i+2]; 3492 if (strcmp(comp, dirp->d_name) == 0) 3493 break; 3494 } 3495 3496 if (i >= NPIDDIRFILES) 3497 return (NULL); 3498 3499 type = (int)dirp->d_ino; 3500 pnp = prgetnode(dp, type); 3501 3502 p = pr_p_lock(dpnp); 3503 mutex_exit(&pr_pidlock); 3504 if (p == NULL) { 3505 prfreenode(pnp); 3506 return (NULL); 3507 } 3508 if (dpnp->pr_pcommon->prc_flags & PRC_DESTROY) { 3509 switch (type) { 3510 case PR_PSINFO: 3511 case PR_USAGE: 3512 break; 3513 default: 3514 prunlock(dpnp); 3515 prfreenode(pnp); 3516 return (NULL); 3517 } 3518 } 3519 3520 switch (type) { 3521 case PR_CURDIR: 3522 case PR_ROOTDIR: 3523 up = PTOU(p); 3524 vp = (type == PR_CURDIR)? up->u_cdir : 3525 (up->u_rdir? up->u_rdir : rootdir); 3526 3527 if (vp == NULL) { /* can't happen? */ 3528 prunlock(dpnp); 3529 prfreenode(pnp); 3530 return (NULL); 3531 } 3532 /* 3533 * Fill in the prnode so future references will 3534 * be able to find the underlying object's vnode. 3535 */ 3536 VN_HOLD(vp); 3537 pnp->pr_realvp = vp; 3538 break; 3539 default: 3540 break; 3541 } 3542 3543 mutex_enter(&dpnp->pr_mutex); 3544 3545 if ((vp = dpnp->pr_files[i]) != NULL && 3546 !(VTOP(vp)->pr_flags & PR_INVAL)) { 3547 VN_HOLD(vp); 3548 mutex_exit(&dpnp->pr_mutex); 3549 prunlock(dpnp); 3550 prfreenode(pnp); 3551 return (vp); 3552 } 3553 3554 /* 3555 * prgetnode() initialized most of the prnode. 3556 * Finish the job. 3557 */ 3558 pnp->pr_common = dpnp->pr_common; 3559 pnp->pr_pcommon = dpnp->pr_pcommon; 3560 pnp->pr_parent = dp; 3561 VN_HOLD(dp); 3562 pnp->pr_index = i; 3563 3564 dpnp->pr_files[i] = vp = PTOV(pnp); 3565 3566 /* 3567 * Link new vnode into list of all /proc vnodes for the process. 3568 */ 3569 if (vp->v_type == VPROC) { 3570 pnp->pr_next = p->p_plist; 3571 p->p_plist = vp; 3572 } 3573 mutex_exit(&dpnp->pr_mutex); 3574 prunlock(dpnp); 3575 return (vp); 3576 } 3577 3578 static vnode_t * 3579 pr_lookup_objectdir(vnode_t *dp, char *comp) 3580 { 3581 prnode_t *dpnp = VTOP(dp); 3582 prnode_t *pnp; 3583 proc_t *p; 3584 struct seg *seg; 3585 struct as *as; 3586 vnode_t *vp; 3587 vattr_t vattr; 3588 3589 ASSERT(dpnp->pr_type == PR_OBJECTDIR); 3590 3591 pnp = prgetnode(dp, PR_OBJECT); 3592 3593 if (prlock(dpnp, ZNO) != 0) { 3594 prfreenode(pnp); 3595 return (NULL); 3596 } 3597 p = dpnp->pr_common->prc_proc; 3598 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 3599 prunlock(dpnp); 3600 prfreenode(pnp); 3601 return (NULL); 3602 } 3603 3604 /* 3605 * We drop p_lock before grabbing the address space lock 3606 * in order to avoid a deadlock with the clock thread. 3607 * The process will not disappear and its address space 3608 * will not change because it is marked P_PR_LOCK. 3609 */ 3610 mutex_exit(&p->p_lock); 3611 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 3612 if ((seg = AS_SEGFIRST(as)) == NULL) { 3613 vp = NULL; 3614 goto out; 3615 } 3616 if (strcmp(comp, "a.out") == 0) { 3617 vp = p->p_exec; 3618 goto out; 3619 } 3620 do { 3621 /* 3622 * Manufacture a filename for the "object" directory. 3623 */ 3624 vattr.va_mask = AT_FSID|AT_NODEID; 3625 if (seg->s_ops == &segvn_ops && 3626 SEGOP_GETVP(seg, seg->s_base, &vp) == 0 && 3627 vp != NULL && vp->v_type == VREG && 3628 VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) == 0) { 3629 char name[64]; 3630 3631 if (vp == p->p_exec) /* "a.out" */ 3632 continue; 3633 pr_object_name(name, vp, &vattr); 3634 if (strcmp(name, comp) == 0) 3635 goto out; 3636 } 3637 } while ((seg = AS_SEGNEXT(as, seg)) != NULL); 3638 3639 vp = NULL; 3640 out: 3641 if (vp != NULL) { 3642 VN_HOLD(vp); 3643 } 3644 AS_LOCK_EXIT(as, &as->a_lock); 3645 mutex_enter(&p->p_lock); 3646 prunlock(dpnp); 3647 3648 if (vp == NULL) 3649 prfreenode(pnp); 3650 else { 3651 /* 3652 * Fill in the prnode so future references will 3653 * be able to find the underlying object's vnode. 3654 * Don't link this prnode into the list of all 3655 * prnodes for the process; this is a one-use node. 3656 * Its use is entirely to catch and fail opens for writing. 3657 */ 3658 pnp->pr_realvp = vp; 3659 vp = PTOV(pnp); 3660 } 3661 3662 return (vp); 3663 } 3664 3665 /* 3666 * Find or construct an lwp vnode for the given lwpid. 3667 */ 3668 static vnode_t * 3669 pr_lookup_lwpdir(vnode_t *dp, char *comp) 3670 { 3671 id_t tid; /* same type as t->t_tid */ 3672 int want_agent; 3673 prnode_t *dpnp = VTOP(dp); 3674 prnode_t *pnp; 3675 prcommon_t *pcp; 3676 vnode_t *vp; 3677 proc_t *p; 3678 kthread_t *t; 3679 lwpdir_t *ldp; 3680 lwpent_t *lep; 3681 int tslot; 3682 int c; 3683 3684 ASSERT(dpnp->pr_type == PR_LWPDIR); 3685 3686 tid = 0; 3687 if (strcmp(comp, "agent") == 0) 3688 want_agent = 1; 3689 else { 3690 want_agent = 0; 3691 while ((c = *comp++) != '\0') { 3692 id_t otid; 3693 3694 if (c < '0' || c > '9') 3695 return (NULL); 3696 otid = tid; 3697 tid = 10*tid + c - '0'; 3698 if (tid/10 != otid) /* integer overflow */ 3699 return (NULL); 3700 } 3701 } 3702 3703 pnp = prgetnode(dp, PR_LWPIDDIR); 3704 3705 p = pr_p_lock(dpnp); 3706 mutex_exit(&pr_pidlock); 3707 if (p == NULL) { 3708 prfreenode(pnp); 3709 return (NULL); 3710 } 3711 3712 if (want_agent) { 3713 if ((t = p->p_agenttp) == NULL) 3714 lep = NULL; 3715 else { 3716 tid = t->t_tid; 3717 tslot = t->t_dslot; 3718 lep = p->p_lwpdir[tslot].ld_entry; 3719 } 3720 } else { 3721 if ((ldp = lwp_hash_lookup(p, tid)) == NULL) 3722 lep = NULL; 3723 else { 3724 tslot = (int)(ldp - p->p_lwpdir); 3725 lep = ldp->ld_entry; 3726 } 3727 } 3728 3729 if (lep == NULL) { 3730 prunlock(dpnp); 3731 prfreenode(pnp); 3732 return (NULL); 3733 } 3734 3735 /* 3736 * If an lwp vnode already exists and it is not invalid 3737 * and it was created by the current process and it belongs 3738 * to the same /proc mount point as our parent vnode, then 3739 * just use it and discard the newly-allocated prnode. 3740 */ 3741 for (vp = lep->le_trace; vp != NULL; vp = VTOP(vp)->pr_next) { 3742 if (!(VTOP(vp)->pr_flags & PR_INVAL) && 3743 VTOP(vp)->pr_owner == curproc && 3744 vp->v_vfsp == dp->v_vfsp) { 3745 VN_HOLD(vp); 3746 prunlock(dpnp); 3747 prfreenode(pnp); 3748 return (vp); 3749 } 3750 } 3751 pnp->pr_owner = curproc; 3752 3753 /* 3754 * prgetnode() initialized most of the prnode. 3755 * Finish the job. 3756 */ 3757 pcp = pnp->pr_common; /* the newly-allocated prcommon struct */ 3758 if ((vp = lep->le_trace) != NULL) { 3759 /* discard the new prcommon and use the existing prcommon */ 3760 prfreecommon(pcp); 3761 pcp = VTOP(vp)->pr_common; 3762 mutex_enter(&pcp->prc_mutex); 3763 ASSERT(pcp->prc_refcnt > 0); 3764 pcp->prc_refcnt++; 3765 mutex_exit(&pcp->prc_mutex); 3766 pnp->pr_common = pcp; 3767 } else { 3768 /* initialize the new prcommon struct */ 3769 pcp->prc_flags |= PRC_LWP; 3770 if ((p->p_flag & SSYS) || p->p_as == &kas) 3771 pcp->prc_flags |= PRC_SYS; 3772 if ((t = lep->le_thread) == NULL) 3773 pcp->prc_flags |= PRC_DESTROY; 3774 pcp->prc_proc = p; 3775 pcp->prc_datamodel = dpnp->pr_pcommon->prc_datamodel; 3776 pcp->prc_pid = p->p_pid; 3777 pcp->prc_slot = p->p_slot; 3778 pcp->prc_thread = t; 3779 pcp->prc_tid = tid; 3780 pcp->prc_tslot = tslot; 3781 } 3782 pnp->pr_pcommon = dpnp->pr_pcommon; 3783 pnp->pr_parent = dp; 3784 VN_HOLD(dp); 3785 /* 3786 * Link in the old, invalid directory vnode so we 3787 * can later determine the last close of the file. 3788 */ 3789 pnp->pr_next = lep->le_trace; 3790 lep->le_trace = vp = PTOV(pnp); 3791 prunlock(dpnp); 3792 return (vp); 3793 } 3794 3795 static vnode_t * 3796 pr_lookup_lwpiddir(vnode_t *dp, char *comp) 3797 { 3798 prnode_t *dpnp = VTOP(dp); 3799 vnode_t *vp; 3800 prnode_t *pnp; 3801 proc_t *p; 3802 prdirent_t *dirp; 3803 int i; 3804 enum prnodetype type; 3805 3806 ASSERT(dpnp->pr_type == PR_LWPIDDIR); 3807 3808 for (i = 0; i < NLWPIDDIRFILES; i++) { 3809 /* Skip "." and ".." */ 3810 dirp = &lwpiddir[i+2]; 3811 if (strcmp(comp, dirp->d_name) == 0) 3812 break; 3813 } 3814 3815 if (i >= NLWPIDDIRFILES) 3816 return (NULL); 3817 3818 type = (int)dirp->d_ino; 3819 pnp = prgetnode(dp, type); 3820 3821 p = pr_p_lock(dpnp); 3822 mutex_exit(&pr_pidlock); 3823 if (p == NULL) { 3824 prfreenode(pnp); 3825 return (NULL); 3826 } 3827 if (dpnp->pr_common->prc_flags & PRC_DESTROY) { 3828 /* 3829 * Only the lwpsinfo file is present for zombie lwps. 3830 * Nothing is present if the lwp has been reaped. 3831 */ 3832 if (dpnp->pr_common->prc_tslot == -1 || 3833 type != PR_LWPSINFO) { 3834 prunlock(dpnp); 3835 prfreenode(pnp); 3836 return (NULL); 3837 } 3838 } 3839 3840 #if defined(__sparc) 3841 /* the asrs file exists only for sparc v9 _LP64 processes */ 3842 if (type == PR_ASRS && p->p_model != DATAMODEL_LP64) { 3843 prunlock(dpnp); 3844 prfreenode(pnp); 3845 return (NULL); 3846 } 3847 #endif 3848 3849 mutex_enter(&dpnp->pr_mutex); 3850 3851 if ((vp = dpnp->pr_files[i]) != NULL && 3852 !(VTOP(vp)->pr_flags & PR_INVAL)) { 3853 VN_HOLD(vp); 3854 mutex_exit(&dpnp->pr_mutex); 3855 prunlock(dpnp); 3856 prfreenode(pnp); 3857 return (vp); 3858 } 3859 3860 /* 3861 * prgetnode() initialized most of the prnode. 3862 * Finish the job. 3863 */ 3864 pnp->pr_common = dpnp->pr_common; 3865 pnp->pr_pcommon = dpnp->pr_pcommon; 3866 pnp->pr_parent = dp; 3867 VN_HOLD(dp); 3868 pnp->pr_index = i; 3869 3870 dpnp->pr_files[i] = vp = PTOV(pnp); 3871 3872 /* 3873 * Link new vnode into list of all /proc vnodes for the process. 3874 */ 3875 if (vp->v_type == VPROC) { 3876 pnp->pr_next = p->p_plist; 3877 p->p_plist = vp; 3878 } 3879 mutex_exit(&dpnp->pr_mutex); 3880 prunlock(dpnp); 3881 return (vp); 3882 } 3883 3884 /* 3885 * Lookup one of the process's open files. 3886 */ 3887 static vnode_t * 3888 pr_lookup_fddir(vnode_t *dp, char *comp) 3889 { 3890 prnode_t *dpnp = VTOP(dp); 3891 prnode_t *pnp; 3892 vnode_t *vp = NULL; 3893 proc_t *p; 3894 file_t *fp; 3895 uint_t fd; 3896 int c; 3897 uf_entry_t *ufp; 3898 uf_info_t *fip; 3899 3900 ASSERT(dpnp->pr_type == PR_FDDIR); 3901 3902 fd = 0; 3903 while ((c = *comp++) != '\0') { 3904 int ofd; 3905 if (c < '0' || c > '9') 3906 return (NULL); 3907 ofd = fd; 3908 fd = 10*fd + c - '0'; 3909 if (fd/10 != ofd) /* integer overflow */ 3910 return (NULL); 3911 } 3912 3913 pnp = prgetnode(dp, PR_FD); 3914 3915 if (prlock(dpnp, ZNO) != 0) { 3916 prfreenode(pnp); 3917 return (NULL); 3918 } 3919 p = dpnp->pr_common->prc_proc; 3920 if ((p->p_flag & SSYS) || p->p_as == &kas) { 3921 prunlock(dpnp); 3922 prfreenode(pnp); 3923 return (NULL); 3924 } 3925 3926 fip = P_FINFO(p); 3927 mutex_exit(&p->p_lock); 3928 mutex_enter(&fip->fi_lock); 3929 if (fd < fip->fi_nfiles) { 3930 UF_ENTER(ufp, fip, fd); 3931 if ((fp = ufp->uf_file) != NULL) { 3932 pnp->pr_mode = 07111; 3933 if (fp->f_flag & FREAD) 3934 pnp->pr_mode |= 0444; 3935 if (fp->f_flag & FWRITE) 3936 pnp->pr_mode |= 0222; 3937 vp = fp->f_vnode; 3938 VN_HOLD(vp); 3939 } 3940 UF_EXIT(ufp); 3941 } 3942 mutex_exit(&fip->fi_lock); 3943 mutex_enter(&p->p_lock); 3944 prunlock(dpnp); 3945 3946 if (vp == NULL) 3947 prfreenode(pnp); 3948 else { 3949 /* 3950 * Fill in the prnode so future references will 3951 * be able to find the underlying object's vnode. 3952 * Don't link this prnode into the list of all 3953 * prnodes for the process; this is a one-use node. 3954 */ 3955 pnp->pr_realvp = vp; 3956 pnp->pr_parent = dp; /* needed for prlookup */ 3957 VN_HOLD(dp); 3958 vp = PTOV(pnp); 3959 if (pnp->pr_realvp->v_type == VDIR) 3960 vp->v_type = VDIR; 3961 } 3962 3963 return (vp); 3964 } 3965 3966 static vnode_t * 3967 pr_lookup_pathdir(vnode_t *dp, char *comp) 3968 { 3969 prnode_t *dpnp = VTOP(dp); 3970 prnode_t *pnp; 3971 vnode_t *vp = NULL; 3972 proc_t *p; 3973 uint_t fd, flags = 0; 3974 int c; 3975 uf_entry_t *ufp; 3976 uf_info_t *fip; 3977 enum { NAME_FD, NAME_OBJECT, NAME_ROOT, NAME_CWD, NAME_UNKNOWN } type; 3978 char *tmp; 3979 int idx; 3980 struct seg *seg; 3981 struct as *as = NULL; 3982 vattr_t vattr; 3983 3984 ASSERT(dpnp->pr_type == PR_PATHDIR); 3985 3986 /* 3987 * First, check if this is a numeric entry, in which case we have a 3988 * file descriptor. 3989 */ 3990 fd = 0; 3991 type = NAME_FD; 3992 tmp = comp; 3993 while ((c = *tmp++) != '\0') { 3994 int ofd; 3995 if (c < '0' || c > '9') { 3996 type = NAME_UNKNOWN; 3997 break; 3998 } 3999 ofd = fd; 4000 fd = 10*fd + c - '0'; 4001 if (fd/10 != ofd) { /* integer overflow */ 4002 type = NAME_UNKNOWN; 4003 break; 4004 } 4005 } 4006 4007 /* 4008 * Next, see if it is one of the special values {root, cwd}. 4009 */ 4010 if (type == NAME_UNKNOWN) { 4011 if (strcmp(comp, "root") == 0) 4012 type = NAME_ROOT; 4013 else if (strcmp(comp, "cwd") == 0) 4014 type = NAME_CWD; 4015 } 4016 4017 /* 4018 * Grab the necessary data from the process 4019 */ 4020 if (prlock(dpnp, ZNO) != 0) 4021 return (NULL); 4022 p = dpnp->pr_common->prc_proc; 4023 4024 fip = P_FINFO(p); 4025 4026 switch (type) { 4027 case NAME_ROOT: 4028 if ((vp = PTOU(p)->u_rdir) == NULL) 4029 vp = p->p_zone->zone_rootvp; 4030 VN_HOLD(vp); 4031 break; 4032 case NAME_CWD: 4033 vp = PTOU(p)->u_cdir; 4034 VN_HOLD(vp); 4035 break; 4036 default: 4037 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 4038 prunlock(dpnp); 4039 return (NULL); 4040 } 4041 } 4042 mutex_exit(&p->p_lock); 4043 4044 /* 4045 * Determine if this is an object entry 4046 */ 4047 if (type == NAME_UNKNOWN) { 4048 /* 4049 * Start with the inode index immediately after the number of 4050 * files. 4051 */ 4052 mutex_enter(&fip->fi_lock); 4053 idx = fip->fi_nfiles + 4; 4054 mutex_exit(&fip->fi_lock); 4055 4056 if (strcmp(comp, "a.out") == 0) { 4057 if (p->p_execdir != NULL) { 4058 vp = p->p_execdir; 4059 VN_HOLD(vp); 4060 type = NAME_OBJECT; 4061 flags |= PR_AOUT; 4062 } else { 4063 vp = p->p_exec; 4064 VN_HOLD(vp); 4065 type = NAME_OBJECT; 4066 } 4067 } else { 4068 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 4069 if ((seg = AS_SEGFIRST(as)) != NULL) { 4070 do { 4071 /* 4072 * Manufacture a filename for the 4073 * "object" directory. 4074 */ 4075 vattr.va_mask = AT_FSID|AT_NODEID; 4076 if (seg->s_ops == &segvn_ops && 4077 SEGOP_GETVP(seg, seg->s_base, &vp) 4078 == 0 && 4079 vp != NULL && vp->v_type == VREG && 4080 VOP_GETATTR(vp, &vattr, 0, CRED(), 4081 NULL) == 0) { 4082 char name[64]; 4083 4084 if (vp == p->p_exec) 4085 continue; 4086 idx++; 4087 pr_object_name(name, vp, 4088 &vattr); 4089 if (strcmp(name, comp) == 0) 4090 break; 4091 } 4092 } while ((seg = AS_SEGNEXT(as, seg)) != NULL); 4093 } 4094 4095 if (seg == NULL) { 4096 vp = NULL; 4097 } else { 4098 VN_HOLD(vp); 4099 type = NAME_OBJECT; 4100 } 4101 4102 AS_LOCK_EXIT(as, &as->a_lock); 4103 } 4104 } 4105 4106 4107 switch (type) { 4108 case NAME_FD: 4109 mutex_enter(&fip->fi_lock); 4110 if (fd < fip->fi_nfiles) { 4111 UF_ENTER(ufp, fip, fd); 4112 if (ufp->uf_file != NULL) { 4113 vp = ufp->uf_file->f_vnode; 4114 VN_HOLD(vp); 4115 } 4116 UF_EXIT(ufp); 4117 } 4118 mutex_exit(&fip->fi_lock); 4119 idx = fd + 4; 4120 break; 4121 case NAME_ROOT: 4122 idx = 2; 4123 break; 4124 case NAME_CWD: 4125 idx = 3; 4126 break; 4127 case NAME_OBJECT: 4128 case NAME_UNKNOWN: 4129 /* Nothing to do */ 4130 break; 4131 } 4132 4133 mutex_enter(&p->p_lock); 4134 prunlock(dpnp); 4135 4136 if (vp != NULL) { 4137 pnp = prgetnode(dp, PR_PATH); 4138 4139 pnp->pr_flags |= flags; 4140 pnp->pr_common = dpnp->pr_common; 4141 pnp->pr_pcommon = dpnp->pr_pcommon; 4142 pnp->pr_realvp = vp; 4143 pnp->pr_parent = dp; /* needed for prlookup */ 4144 pnp->pr_ino = pmkino(idx, dpnp->pr_common->prc_slot, PR_PATH); 4145 VN_HOLD(dp); 4146 vp = PTOV(pnp); 4147 vp->v_type = VLNK; 4148 } 4149 4150 return (vp); 4151 } 4152 4153 /* 4154 * Look up one of the process's active templates. 4155 */ 4156 static vnode_t * 4157 pr_lookup_tmpldir(vnode_t *dp, char *comp) 4158 { 4159 prnode_t *dpnp = VTOP(dp); 4160 prnode_t *pnp; 4161 vnode_t *vp = NULL; 4162 proc_t *p; 4163 int i; 4164 4165 ASSERT(dpnp->pr_type == PR_TMPLDIR); 4166 4167 for (i = 0; i < ct_ntypes; i++) 4168 if (strcmp(comp, ct_types[i]->ct_type_name) == 0) 4169 break; 4170 if (i == ct_ntypes) 4171 return (NULL); 4172 4173 pnp = prgetnode(dp, PR_TMPL); 4174 4175 if (prlock(dpnp, ZNO) != 0) { 4176 prfreenode(pnp); 4177 return (NULL); 4178 } 4179 p = dpnp->pr_common->prc_proc; 4180 if ((p->p_flag & SSYS) || p->p_as == &kas || 4181 (dpnp->pr_common->prc_flags & (PRC_DESTROY | PRC_LWP)) != PRC_LWP) { 4182 prunlock(dpnp); 4183 prfreenode(pnp); 4184 return (NULL); 4185 } 4186 if (ttolwp(dpnp->pr_common->prc_thread)->lwp_ct_active[i] != NULL) { 4187 pnp->pr_common = dpnp->pr_common; 4188 pnp->pr_pcommon = dpnp->pr_pcommon; 4189 pnp->pr_parent = dp; 4190 pnp->pr_cttype = i; 4191 VN_HOLD(dp); 4192 vp = PTOV(pnp); 4193 } else { 4194 prfreenode(pnp); 4195 } 4196 prunlock(dpnp); 4197 4198 return (vp); 4199 } 4200 4201 /* 4202 * Look up one of the contracts owned by the process. 4203 */ 4204 static vnode_t * 4205 pr_lookup_ctdir(vnode_t *dp, char *comp) 4206 { 4207 prnode_t *dpnp = VTOP(dp); 4208 prnode_t *pnp; 4209 vnode_t *vp = NULL; 4210 proc_t *p; 4211 id_t id = 0; 4212 contract_t *ct; 4213 int c; 4214 4215 ASSERT(dpnp->pr_type == PR_CTDIR); 4216 4217 while ((c = *comp++) != '\0') { 4218 id_t oid; 4219 if (c < '0' || c > '9') 4220 return (NULL); 4221 oid = id; 4222 id = 10 * id + c - '0'; 4223 if (id / 10 != oid) /* integer overflow */ 4224 return (NULL); 4225 } 4226 4227 /* 4228 * Search all contracts; we'll filter below. 4229 */ 4230 ct = contract_ptr(id, GLOBAL_ZONEUNIQID); 4231 if (ct == NULL) 4232 return (NULL); 4233 4234 pnp = prgetnode(dp, PR_CT); 4235 4236 if (prlock(dpnp, ZNO) != 0) { 4237 prfreenode(pnp); 4238 contract_rele(ct); 4239 return (NULL); 4240 } 4241 p = dpnp->pr_common->prc_proc; 4242 /* 4243 * We only allow lookups of contracts owned by this process, or, 4244 * if we are zsched and this is a zone's procfs, contracts on 4245 * stuff in the zone which are held by processes or contracts 4246 * outside the zone. (see logic in contract_status_common) 4247 */ 4248 if ((ct->ct_owner != p) && 4249 !(p == VTOZONE(dp)->zone_zsched && ct->ct_state < CTS_ORPHAN && 4250 VTOZONE(dp)->zone_uniqid == contract_getzuniqid(ct) && 4251 VTOZONE(dp)->zone_uniqid != GLOBAL_ZONEUNIQID && 4252 ct->ct_czuniqid == GLOBAL_ZONEUNIQID)) { 4253 prunlock(dpnp); 4254 prfreenode(pnp); 4255 contract_rele(ct); 4256 return (NULL); 4257 } 4258 pnp->pr_common = dpnp->pr_common; 4259 pnp->pr_pcommon = dpnp->pr_pcommon; 4260 pnp->pr_contract = ct; 4261 pnp->pr_parent = dp; 4262 pnp->pr_ino = pmkino(id, pnp->pr_common->prc_slot, PR_CT); 4263 VN_HOLD(dp); 4264 prunlock(dpnp); 4265 vp = PTOV(pnp); 4266 4267 return (vp); 4268 } 4269 4270 /* 4271 * Construct an lwp vnode for the old /proc interface. 4272 * We stand on our head to make the /proc plumbing correct. 4273 */ 4274 vnode_t * 4275 prlwpnode(prnode_t *pnp, uint_t tid) 4276 { 4277 char comp[12]; 4278 vnode_t *dp; 4279 vnode_t *vp; 4280 prcommon_t *pcp; 4281 proc_t *p; 4282 4283 /* 4284 * Lookup the /proc/<pid>/lwp/<lwpid> directory vnode. 4285 */ 4286 if (pnp->pr_type == PR_PIDFILE) { 4287 dp = pnp->pr_parent; /* /proc/<pid> */ 4288 VN_HOLD(dp); 4289 vp = pr_lookup_piddir(dp, "lwp"); 4290 VN_RELE(dp); 4291 if ((dp = vp) == NULL) /* /proc/<pid>/lwp */ 4292 return (NULL); 4293 } else if (pnp->pr_type == PR_LWPIDFILE) { 4294 dp = pnp->pr_parent; /* /proc/<pid>/lwp/<lwpid> */ 4295 dp = VTOP(dp)->pr_parent; /* /proc/<pid>/lwp */ 4296 VN_HOLD(dp); 4297 } else { 4298 return (NULL); 4299 } 4300 4301 (void) pr_u32tos(tid, comp, sizeof (comp)); 4302 vp = pr_lookup_lwpdir(dp, comp); 4303 VN_RELE(dp); 4304 if ((dp = vp) == NULL) 4305 return (NULL); 4306 4307 pnp = prgetnode(dp, PR_LWPIDFILE); 4308 vp = PTOV(pnp); 4309 4310 /* 4311 * prgetnode() initialized most of the prnode. 4312 * Finish the job. 4313 */ 4314 pcp = VTOP(dp)->pr_common; 4315 pnp->pr_ino = ptoi(pcp->prc_pid); 4316 pnp->pr_common = pcp; 4317 pnp->pr_pcommon = VTOP(dp)->pr_pcommon; 4318 pnp->pr_parent = dp; 4319 /* 4320 * Link new vnode into list of all /proc vnodes for the process. 4321 */ 4322 p = pr_p_lock(pnp); 4323 mutex_exit(&pr_pidlock); 4324 if (p == NULL) { 4325 VN_RELE(dp); 4326 prfreenode(pnp); 4327 vp = NULL; 4328 } else if (pcp->prc_thread == NULL) { 4329 prunlock(pnp); 4330 VN_RELE(dp); 4331 prfreenode(pnp); 4332 vp = NULL; 4333 } else { 4334 pnp->pr_next = p->p_plist; 4335 p->p_plist = vp; 4336 prunlock(pnp); 4337 } 4338 4339 return (vp); 4340 } 4341 4342 #if defined(DEBUG) 4343 4344 static uint32_t nprnode; 4345 static uint32_t nprcommon; 4346 4347 #define INCREMENT(x) atomic_add_32(&x, 1); 4348 #define DECREMENT(x) atomic_add_32(&x, -1); 4349 4350 #else 4351 4352 #define INCREMENT(x) 4353 #define DECREMENT(x) 4354 4355 #endif /* DEBUG */ 4356 4357 /* 4358 * New /proc vnode required; allocate it and fill in most of the fields. 4359 */ 4360 prnode_t * 4361 prgetnode(vnode_t *dp, prnodetype_t type) 4362 { 4363 prnode_t *pnp; 4364 prcommon_t *pcp; 4365 vnode_t *vp; 4366 ulong_t nfiles; 4367 4368 INCREMENT(nprnode); 4369 pnp = kmem_zalloc(sizeof (prnode_t), KM_SLEEP); 4370 4371 mutex_init(&pnp->pr_mutex, NULL, MUTEX_DEFAULT, NULL); 4372 pnp->pr_type = type; 4373 4374 pnp->pr_vnode = vn_alloc(KM_SLEEP); 4375 4376 vp = PTOV(pnp); 4377 vp->v_flag = VNOCACHE|VNOMAP|VNOSWAP|VNOMOUNT; 4378 vn_setops(vp, prvnodeops); 4379 vp->v_vfsp = dp->v_vfsp; 4380 vp->v_type = VPROC; 4381 vp->v_data = (caddr_t)pnp; 4382 4383 switch (type) { 4384 case PR_PIDDIR: 4385 case PR_LWPIDDIR: 4386 /* 4387 * We need a prcommon and a files array for each of these. 4388 */ 4389 INCREMENT(nprcommon); 4390 4391 pcp = kmem_zalloc(sizeof (prcommon_t), KM_SLEEP); 4392 pcp->prc_refcnt = 1; 4393 pnp->pr_common = pcp; 4394 mutex_init(&pcp->prc_mutex, NULL, MUTEX_DEFAULT, NULL); 4395 cv_init(&pcp->prc_wait, NULL, CV_DEFAULT, NULL); 4396 4397 nfiles = (type == PR_PIDDIR)? NPIDDIRFILES : NLWPIDDIRFILES; 4398 pnp->pr_files = 4399 kmem_zalloc(nfiles * sizeof (vnode_t *), KM_SLEEP); 4400 4401 vp->v_type = VDIR; 4402 /* 4403 * Mode should be read-search by all, but we cannot so long 4404 * as we must support compatibility mode with old /proc. 4405 * Make /proc/<pid> be read by owner only, search by all. 4406 * Make /proc/<pid>/lwp/<lwpid> read-search by all. Also, 4407 * set VDIROPEN on /proc/<pid> so it can be opened for writing. 4408 */ 4409 if (type == PR_PIDDIR) { 4410 /* kludge for old /proc interface */ 4411 prnode_t *xpnp = prgetnode(dp, PR_PIDFILE); 4412 pnp->pr_pidfile = PTOV(xpnp); 4413 pnp->pr_mode = 0511; 4414 vp->v_flag |= VDIROPEN; 4415 } else { 4416 pnp->pr_mode = 0555; 4417 } 4418 4419 break; 4420 4421 case PR_CURDIR: 4422 case PR_ROOTDIR: 4423 case PR_FDDIR: 4424 case PR_OBJECTDIR: 4425 case PR_PATHDIR: 4426 case PR_CTDIR: 4427 case PR_TMPLDIR: 4428 vp->v_type = VDIR; 4429 pnp->pr_mode = 0500; /* read-search by owner only */ 4430 break; 4431 4432 case PR_CT: 4433 vp->v_type = VLNK; 4434 pnp->pr_mode = 0500; /* read-search by owner only */ 4435 break; 4436 4437 case PR_PATH: 4438 case PR_SELF: 4439 vp->v_type = VLNK; 4440 pnp->pr_mode = 0777; 4441 break; 4442 4443 case PR_LWPDIR: 4444 vp->v_type = VDIR; 4445 pnp->pr_mode = 0555; /* read-search by all */ 4446 break; 4447 4448 case PR_AS: 4449 case PR_TMPL: 4450 pnp->pr_mode = 0600; /* read-write by owner only */ 4451 break; 4452 4453 case PR_CTL: 4454 case PR_LWPCTL: 4455 pnp->pr_mode = 0200; /* write-only by owner only */ 4456 break; 4457 4458 case PR_PIDFILE: 4459 case PR_LWPIDFILE: 4460 pnp->pr_mode = 0600; /* read-write by owner only */ 4461 break; 4462 4463 case PR_PSINFO: 4464 case PR_LPSINFO: 4465 case PR_LWPSINFO: 4466 case PR_USAGE: 4467 case PR_LUSAGE: 4468 case PR_LWPUSAGE: 4469 pnp->pr_mode = 0444; /* read-only by all */ 4470 break; 4471 4472 default: 4473 pnp->pr_mode = 0400; /* read-only by owner only */ 4474 break; 4475 } 4476 vn_exists(vp); 4477 return (pnp); 4478 } 4479 4480 /* 4481 * Free the storage obtained from prgetnode(). 4482 */ 4483 void 4484 prfreenode(prnode_t *pnp) 4485 { 4486 vnode_t *vp; 4487 ulong_t nfiles; 4488 4489 vn_invalid(PTOV(pnp)); 4490 vn_free(PTOV(pnp)); 4491 mutex_destroy(&pnp->pr_mutex); 4492 4493 switch (pnp->pr_type) { 4494 case PR_PIDDIR: 4495 /* kludge for old /proc interface */ 4496 if (pnp->pr_pidfile != NULL) { 4497 prfreenode(VTOP(pnp->pr_pidfile)); 4498 pnp->pr_pidfile = NULL; 4499 } 4500 /* FALLTHROUGH */ 4501 case PR_LWPIDDIR: 4502 /* 4503 * We allocated a prcommon and a files array for each of these. 4504 */ 4505 prfreecommon(pnp->pr_common); 4506 nfiles = (pnp->pr_type == PR_PIDDIR)? 4507 NPIDDIRFILES : NLWPIDDIRFILES; 4508 kmem_free(pnp->pr_files, nfiles * sizeof (vnode_t *)); 4509 break; 4510 default: 4511 break; 4512 } 4513 /* 4514 * If there is an underlying vnode, be sure 4515 * to release it after freeing the prnode. 4516 */ 4517 vp = pnp->pr_realvp; 4518 kmem_free(pnp, sizeof (*pnp)); 4519 DECREMENT(nprnode); 4520 if (vp != NULL) { 4521 VN_RELE(vp); 4522 } 4523 } 4524 4525 /* 4526 * Free a prcommon structure, if the reference count reaches zero. 4527 */ 4528 static void 4529 prfreecommon(prcommon_t *pcp) 4530 { 4531 mutex_enter(&pcp->prc_mutex); 4532 ASSERT(pcp->prc_refcnt > 0); 4533 if (--pcp->prc_refcnt != 0) 4534 mutex_exit(&pcp->prc_mutex); 4535 else { 4536 mutex_exit(&pcp->prc_mutex); 4537 ASSERT(pcp->prc_pollhead.ph_list == NULL); 4538 ASSERT(pcp->prc_refcnt == 0); 4539 ASSERT(pcp->prc_selfopens == 0 && pcp->prc_writers == 0); 4540 mutex_destroy(&pcp->prc_mutex); 4541 cv_destroy(&pcp->prc_wait); 4542 kmem_free(pcp, sizeof (prcommon_t)); 4543 DECREMENT(nprcommon); 4544 } 4545 } 4546 4547 /* 4548 * Array of readdir functions, indexed by /proc file type. 4549 */ 4550 static int pr_readdir_notdir(), pr_readdir_procdir(), pr_readdir_piddir(), 4551 pr_readdir_objectdir(), pr_readdir_lwpdir(), pr_readdir_lwpiddir(), 4552 pr_readdir_fddir(), pr_readdir_pathdir(), pr_readdir_tmpldir(), 4553 pr_readdir_ctdir(); 4554 4555 static int (*pr_readdir_function[PR_NFILES])() = { 4556 pr_readdir_procdir, /* /proc */ 4557 pr_readdir_notdir, /* /proc/self */ 4558 pr_readdir_piddir, /* /proc/<pid> */ 4559 pr_readdir_notdir, /* /proc/<pid>/as */ 4560 pr_readdir_notdir, /* /proc/<pid>/ctl */ 4561 pr_readdir_notdir, /* /proc/<pid>/status */ 4562 pr_readdir_notdir, /* /proc/<pid>/lstatus */ 4563 pr_readdir_notdir, /* /proc/<pid>/psinfo */ 4564 pr_readdir_notdir, /* /proc/<pid>/lpsinfo */ 4565 pr_readdir_notdir, /* /proc/<pid>/map */ 4566 pr_readdir_notdir, /* /proc/<pid>/rmap */ 4567 pr_readdir_notdir, /* /proc/<pid>/xmap */ 4568 pr_readdir_notdir, /* /proc/<pid>/cred */ 4569 pr_readdir_notdir, /* /proc/<pid>/sigact */ 4570 pr_readdir_notdir, /* /proc/<pid>/auxv */ 4571 #if defined(__x86) 4572 pr_readdir_notdir, /* /proc/<pid>/ldt */ 4573 #endif 4574 pr_readdir_notdir, /* /proc/<pid>/usage */ 4575 pr_readdir_notdir, /* /proc/<pid>/lusage */ 4576 pr_readdir_notdir, /* /proc/<pid>/pagedata */ 4577 pr_readdir_notdir, /* /proc/<pid>/watch */ 4578 pr_readdir_notdir, /* /proc/<pid>/cwd */ 4579 pr_readdir_notdir, /* /proc/<pid>/root */ 4580 pr_readdir_fddir, /* /proc/<pid>/fd */ 4581 pr_readdir_notdir, /* /proc/<pid>/fd/nn */ 4582 pr_readdir_objectdir, /* /proc/<pid>/object */ 4583 pr_readdir_notdir, /* /proc/<pid>/object/xxx */ 4584 pr_readdir_lwpdir, /* /proc/<pid>/lwp */ 4585 pr_readdir_lwpiddir, /* /proc/<pid>/lwp/<lwpid> */ 4586 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 4587 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 4588 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpsinfo */ 4589 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/lwpusage */ 4590 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/xregs */ 4591 pr_readdir_tmpldir, /* /proc/<pid>/lwp/<lwpid>/templates */ 4592 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/templates/<id> */ 4593 #if defined(__sparc) 4594 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/gwindows */ 4595 pr_readdir_notdir, /* /proc/<pid>/lwp/<lwpid>/asrs */ 4596 #endif 4597 pr_readdir_notdir, /* /proc/<pid>/priv */ 4598 pr_readdir_pathdir, /* /proc/<pid>/path */ 4599 pr_readdir_notdir, /* /proc/<pid>/path/xxx */ 4600 pr_readdir_ctdir, /* /proc/<pid>/contracts */ 4601 pr_readdir_notdir, /* /proc/<pid>/contracts/<ctid> */ 4602 pr_readdir_notdir, /* old process file */ 4603 pr_readdir_notdir, /* old lwp file */ 4604 pr_readdir_notdir, /* old pagedata file */ 4605 }; 4606 4607 /* ARGSUSED */ 4608 static int 4609 prreaddir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp, 4610 caller_context_t *ct, int flags) 4611 { 4612 prnode_t *pnp = VTOP(vp); 4613 4614 ASSERT(pnp->pr_type < PR_NFILES); 4615 4616 /* XXX - Do we need to pass ct and flags? */ 4617 return (pr_readdir_function[pnp->pr_type](pnp, uiop, eofp)); 4618 } 4619 4620 /* ARGSUSED */ 4621 static int 4622 pr_readdir_notdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4623 { 4624 return (ENOTDIR); 4625 } 4626 4627 /* ARGSUSED */ 4628 static int 4629 pr_readdir_procdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4630 { 4631 zoneid_t zoneid; 4632 gfs_readdir_state_t gstate; 4633 int error, eof = 0; 4634 offset_t n; 4635 4636 ASSERT(pnp->pr_type == PR_PROCDIR); 4637 4638 zoneid = VTOZONE(PTOV(pnp))->zone_id; 4639 4640 if ((error = gfs_readdir_init(&gstate, PNSIZ, PRSDSIZE, uiop, 4641 PRROOTINO, PRROOTINO, 0)) != 0) 4642 return (error); 4643 4644 /* 4645 * Loop until user's request is satisfied or until all processes 4646 * have been examined. 4647 */ 4648 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 4649 uint_t pid; 4650 int pslot; 4651 proc_t *p; 4652 4653 /* 4654 * Find next entry. Skip processes not visible where 4655 * this /proc was mounted. 4656 */ 4657 mutex_enter(&pidlock); 4658 while (n < v.v_proc && 4659 ((p = pid_entry(n)) == NULL || p->p_stat == SIDL || 4660 (zoneid != GLOBAL_ZONEID && p->p_zone->zone_id != zoneid) || 4661 secpolicy_basic_procinfo(CRED(), p, curproc) != 0)) 4662 n++; 4663 4664 /* 4665 * Stop when entire proc table has been examined. 4666 */ 4667 if (n >= v.v_proc) { 4668 mutex_exit(&pidlock); 4669 eof = 1; 4670 break; 4671 } 4672 4673 ASSERT(p->p_stat != 0); 4674 pid = p->p_pid; 4675 pslot = p->p_slot; 4676 mutex_exit(&pidlock); 4677 error = gfs_readdir_emitn(&gstate, uiop, n, 4678 pmkino(0, pslot, PR_PIDDIR), pid); 4679 if (error) 4680 break; 4681 } 4682 4683 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 4684 } 4685 4686 /* ARGSUSED */ 4687 static int 4688 pr_readdir_piddir(prnode_t *pnp, uio_t *uiop, int *eofp) 4689 { 4690 int zombie = ((pnp->pr_pcommon->prc_flags & PRC_DESTROY) != 0); 4691 prdirent_t dirent; 4692 prdirent_t *dirp; 4693 offset_t off; 4694 int error; 4695 4696 ASSERT(pnp->pr_type == PR_PIDDIR); 4697 4698 if (uiop->uio_offset < 0 || 4699 uiop->uio_offset % sizeof (prdirent_t) != 0 || 4700 uiop->uio_resid < sizeof (prdirent_t)) 4701 return (EINVAL); 4702 if (pnp->pr_pcommon->prc_proc == NULL) 4703 return (ENOENT); 4704 if (uiop->uio_offset >= sizeof (piddir)) 4705 goto out; 4706 4707 /* 4708 * Loop until user's request is satisfied, omitting some 4709 * files along the way if the process is a zombie. 4710 */ 4711 for (dirp = &piddir[uiop->uio_offset / sizeof (prdirent_t)]; 4712 uiop->uio_resid >= sizeof (prdirent_t) && 4713 dirp < &piddir[NPIDDIRFILES+2]; 4714 uiop->uio_offset = off + sizeof (prdirent_t), dirp++) { 4715 off = uiop->uio_offset; 4716 if (zombie) { 4717 switch (dirp->d_ino) { 4718 case PR_PIDDIR: 4719 case PR_PROCDIR: 4720 case PR_PSINFO: 4721 case PR_USAGE: 4722 break; 4723 default: 4724 continue; 4725 } 4726 } 4727 bcopy(dirp, &dirent, sizeof (prdirent_t)); 4728 if (dirent.d_ino == PR_PROCDIR) 4729 dirent.d_ino = PRROOTINO; 4730 else 4731 dirent.d_ino = pmkino(0, pnp->pr_pcommon->prc_slot, 4732 dirent.d_ino); 4733 if ((error = uiomove((caddr_t)&dirent, sizeof (prdirent_t), 4734 UIO_READ, uiop)) != 0) 4735 return (error); 4736 } 4737 out: 4738 if (eofp) 4739 *eofp = (uiop->uio_offset >= sizeof (piddir)); 4740 return (0); 4741 } 4742 4743 static void 4744 rebuild_objdir(struct as *as) 4745 { 4746 struct seg *seg; 4747 vnode_t *vp; 4748 vattr_t vattr; 4749 vnode_t **dir; 4750 ulong_t nalloc; 4751 ulong_t nentries; 4752 int i, j; 4753 ulong_t nold, nnew; 4754 4755 ASSERT(AS_WRITE_HELD(as, &as->a_lock)); 4756 4757 if (as->a_updatedir == 0 && as->a_objectdir != NULL) 4758 return; 4759 as->a_updatedir = 0; 4760 4761 if ((nalloc = avl_numnodes(&as->a_segtree)) == 0 || 4762 (seg = AS_SEGFIRST(as)) == NULL) /* can't happen? */ 4763 return; 4764 4765 /* 4766 * Allocate space for the new object directory. 4767 * (This is usually about two times too many entries.) 4768 */ 4769 nalloc = (nalloc + 0xf) & ~0xf; /* multiple of 16 */ 4770 dir = kmem_zalloc(nalloc * sizeof (vnode_t *), KM_SLEEP); 4771 4772 /* fill in the new directory with desired entries */ 4773 nentries = 0; 4774 do { 4775 vattr.va_mask = AT_FSID|AT_NODEID; 4776 if (seg->s_ops == &segvn_ops && 4777 SEGOP_GETVP(seg, seg->s_base, &vp) == 0 && 4778 vp != NULL && vp->v_type == VREG && 4779 VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) == 0) { 4780 for (i = 0; i < nentries; i++) 4781 if (vp == dir[i]) 4782 break; 4783 if (i == nentries) { 4784 ASSERT(nentries < nalloc); 4785 dir[nentries++] = vp; 4786 } 4787 } 4788 } while ((seg = AS_SEGNEXT(as, seg)) != NULL); 4789 4790 if (as->a_objectdir == NULL) { /* first time */ 4791 as->a_objectdir = dir; 4792 as->a_sizedir = nalloc; 4793 return; 4794 } 4795 4796 /* 4797 * Null out all of the defunct entries in the old directory. 4798 */ 4799 nold = 0; 4800 nnew = nentries; 4801 for (i = 0; i < as->a_sizedir; i++) { 4802 if ((vp = as->a_objectdir[i]) != NULL) { 4803 for (j = 0; j < nentries; j++) { 4804 if (vp == dir[j]) { 4805 dir[j] = NULL; 4806 nnew--; 4807 break; 4808 } 4809 } 4810 if (j == nentries) 4811 as->a_objectdir[i] = NULL; 4812 else 4813 nold++; 4814 } 4815 } 4816 4817 if (nold + nnew > as->a_sizedir) { 4818 /* 4819 * Reallocate the old directory to have enough 4820 * space for the old and new entries combined. 4821 * Round up to the next multiple of 16. 4822 */ 4823 ulong_t newsize = (nold + nnew + 0xf) & ~0xf; 4824 vnode_t **newdir = kmem_zalloc(newsize * sizeof (vnode_t *), 4825 KM_SLEEP); 4826 bcopy(as->a_objectdir, newdir, 4827 as->a_sizedir * sizeof (vnode_t *)); 4828 kmem_free(as->a_objectdir, as->a_sizedir * sizeof (vnode_t *)); 4829 as->a_objectdir = newdir; 4830 as->a_sizedir = newsize; 4831 } 4832 4833 /* 4834 * Move all new entries to the old directory and 4835 * deallocate the space used by the new directory. 4836 */ 4837 if (nnew) { 4838 for (i = 0, j = 0; i < nentries; i++) { 4839 if ((vp = dir[i]) == NULL) 4840 continue; 4841 for (; j < as->a_sizedir; j++) { 4842 if (as->a_objectdir[j] != NULL) 4843 continue; 4844 as->a_objectdir[j++] = vp; 4845 break; 4846 } 4847 } 4848 } 4849 kmem_free(dir, nalloc * sizeof (vnode_t *)); 4850 } 4851 4852 /* 4853 * Return the vnode from a slot in the process's object directory. 4854 * The caller must have locked the process's address space. 4855 * The only caller is below, in pr_readdir_objectdir(). 4856 */ 4857 static vnode_t * 4858 obj_entry(struct as *as, int slot) 4859 { 4860 ASSERT(AS_LOCK_HELD(as, &as->a_lock)); 4861 if (as->a_objectdir == NULL) 4862 return (NULL); 4863 ASSERT(slot < as->a_sizedir); 4864 return (as->a_objectdir[slot]); 4865 } 4866 4867 /* ARGSUSED */ 4868 static int 4869 pr_readdir_objectdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4870 { 4871 gfs_readdir_state_t gstate; 4872 int error, eof = 0; 4873 offset_t n; 4874 int pslot; 4875 size_t objdirsize; 4876 proc_t *p; 4877 struct as *as; 4878 vnode_t *vp; 4879 4880 ASSERT(pnp->pr_type == PR_OBJECTDIR); 4881 4882 if ((error = prlock(pnp, ZNO)) != 0) 4883 return (error); 4884 p = pnp->pr_common->prc_proc; 4885 pslot = p->p_slot; 4886 4887 /* 4888 * We drop p_lock before grabbing the address space lock 4889 * in order to avoid a deadlock with the clock thread. 4890 * The process will not disappear and its address space 4891 * will not change because it is marked P_PR_LOCK. 4892 */ 4893 mutex_exit(&p->p_lock); 4894 4895 if ((error = gfs_readdir_init(&gstate, 64, PRSDSIZE, uiop, 4896 pmkino(0, pslot, PR_PIDDIR), 4897 pmkino(0, pslot, PR_OBJECTDIR), 0)) != 0) { 4898 mutex_enter(&p->p_lock); 4899 prunlock(pnp); 4900 return (error); 4901 } 4902 4903 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 4904 as = NULL; 4905 objdirsize = 0; 4906 } 4907 4908 /* 4909 * Loop until user's request is satisfied or until 4910 * all mapped objects have been examined. Cannot hold 4911 * the address space lock for the following call as 4912 * gfs_readdir_pred() utimately causes a call to uiomove(). 4913 */ 4914 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 4915 vattr_t vattr; 4916 char str[64]; 4917 4918 /* 4919 * Set the correct size of the directory just 4920 * in case the process has changed it's address 4921 * space via mmap/munmap calls. 4922 */ 4923 if (as != NULL) { 4924 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 4925 if (as->a_updatedir) 4926 rebuild_objdir(as); 4927 objdirsize = as->a_sizedir; 4928 } 4929 4930 /* 4931 * Find next object. 4932 */ 4933 vattr.va_mask = AT_FSID | AT_NODEID; 4934 while (n < objdirsize && (((vp = obj_entry(as, n)) == NULL) || 4935 (VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) 4936 != 0))) { 4937 vattr.va_mask = AT_FSID | AT_NODEID; 4938 n++; 4939 } 4940 4941 if (as != NULL) 4942 AS_LOCK_EXIT(as, &as->a_lock); 4943 4944 /* 4945 * Stop when all objects have been reported. 4946 */ 4947 if (n >= objdirsize) { 4948 eof = 1; 4949 break; 4950 } 4951 4952 if (vp == p->p_exec) 4953 (void) strcpy(str, "a.out"); 4954 else 4955 pr_object_name(str, vp, &vattr); 4956 4957 error = gfs_readdir_emit(&gstate, uiop, n, vattr.va_nodeid, 4958 str, 0); 4959 4960 if (error) 4961 break; 4962 } 4963 4964 mutex_enter(&p->p_lock); 4965 prunlock(pnp); 4966 4967 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 4968 } 4969 4970 /* ARGSUSED */ 4971 static int 4972 pr_readdir_lwpdir(prnode_t *pnp, uio_t *uiop, int *eofp) 4973 { 4974 gfs_readdir_state_t gstate; 4975 int error, eof = 0; 4976 offset_t tslot; 4977 proc_t *p; 4978 int pslot; 4979 lwpdir_t *lwpdir; 4980 int lwpdirsize; 4981 4982 ASSERT(pnp->pr_type == PR_LWPDIR); 4983 4984 p = pr_p_lock(pnp); 4985 mutex_exit(&pr_pidlock); 4986 if (p == NULL) 4987 return (ENOENT); 4988 ASSERT(p == pnp->pr_common->prc_proc); 4989 pslot = p->p_slot; 4990 lwpdir = p->p_lwpdir; 4991 lwpdirsize = p->p_lwpdir_sz; 4992 4993 /* 4994 * Drop p->p_lock so we can safely do uiomove(). 4995 * The lwp directory will not change because 4996 * we have the process locked with P_PR_LOCK. 4997 */ 4998 mutex_exit(&p->p_lock); 4999 5000 5001 if ((error = gfs_readdir_init(&gstate, PLNSIZ, PRSDSIZE, uiop, 5002 pmkino(0, pslot, PR_PIDDIR), 5003 pmkino(0, pslot, PR_LWPDIR), 0)) != 0) { 5004 mutex_enter(&p->p_lock); 5005 prunlock(pnp); 5006 return (error); 5007 } 5008 5009 /* 5010 * Loop until user's request is satisfied or until all lwps 5011 * have been examined. 5012 */ 5013 while ((error = gfs_readdir_pred(&gstate, uiop, &tslot)) == 0) { 5014 lwpent_t *lep; 5015 uint_t tid; 5016 5017 /* 5018 * Find next LWP. 5019 */ 5020 while (tslot < lwpdirsize && 5021 ((lep = lwpdir[tslot].ld_entry) == NULL)) 5022 tslot++; 5023 /* 5024 * Stop when all lwps have been reported. 5025 */ 5026 if (tslot >= lwpdirsize) { 5027 eof = 1; 5028 break; 5029 } 5030 5031 tid = lep->le_lwpid; 5032 error = gfs_readdir_emitn(&gstate, uiop, tslot, 5033 pmkino(tslot, pslot, PR_LWPIDDIR), tid); 5034 if (error) 5035 break; 5036 } 5037 5038 mutex_enter(&p->p_lock); 5039 prunlock(pnp); 5040 5041 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5042 } 5043 5044 /* ARGSUSED */ 5045 static int 5046 pr_readdir_lwpiddir(prnode_t *pnp, uio_t *uiop, int *eofp) 5047 { 5048 prcommon_t *pcp = pnp->pr_common; 5049 int zombie = ((pcp->prc_flags & PRC_DESTROY) != 0); 5050 prdirent_t dirent; 5051 prdirent_t *dirp; 5052 offset_t off; 5053 int error; 5054 int pslot; 5055 int tslot; 5056 5057 ASSERT(pnp->pr_type == PR_LWPIDDIR); 5058 5059 if (uiop->uio_offset < 0 || 5060 uiop->uio_offset % sizeof (prdirent_t) != 0 || 5061 uiop->uio_resid < sizeof (prdirent_t)) 5062 return (EINVAL); 5063 if (pcp->prc_proc == NULL || pcp->prc_tslot == -1) 5064 return (ENOENT); 5065 if (uiop->uio_offset >= sizeof (lwpiddir)) 5066 goto out; 5067 5068 /* 5069 * Loop until user's request is satisfied, omitting some files 5070 * along the way if the lwp is a zombie and also depending 5071 * on the data model of the process. 5072 */ 5073 pslot = pcp->prc_slot; 5074 tslot = pcp->prc_tslot; 5075 for (dirp = &lwpiddir[uiop->uio_offset / sizeof (prdirent_t)]; 5076 uiop->uio_resid >= sizeof (prdirent_t) && 5077 dirp < &lwpiddir[NLWPIDDIRFILES+2]; 5078 uiop->uio_offset = off + sizeof (prdirent_t), dirp++) { 5079 off = uiop->uio_offset; 5080 if (zombie) { 5081 switch (dirp->d_ino) { 5082 case PR_LWPIDDIR: 5083 case PR_LWPDIR: 5084 case PR_LWPSINFO: 5085 break; 5086 default: 5087 continue; 5088 } 5089 } 5090 #if defined(__sparc) 5091 /* the asrs file exists only for sparc v9 _LP64 processes */ 5092 if (dirp->d_ino == PR_ASRS && 5093 pcp->prc_datamodel != DATAMODEL_LP64) 5094 continue; 5095 #endif 5096 bcopy(dirp, &dirent, sizeof (prdirent_t)); 5097 if (dirent.d_ino == PR_LWPDIR) 5098 dirent.d_ino = pmkino(0, pslot, dirp->d_ino); 5099 else 5100 dirent.d_ino = pmkino(tslot, pslot, dirp->d_ino); 5101 if ((error = uiomove((caddr_t)&dirent, sizeof (prdirent_t), 5102 UIO_READ, uiop)) != 0) 5103 return (error); 5104 } 5105 out: 5106 if (eofp) 5107 *eofp = (uiop->uio_offset >= sizeof (lwpiddir)); 5108 return (0); 5109 } 5110 5111 /* ARGSUSED */ 5112 static int 5113 pr_readdir_fddir(prnode_t *pnp, uio_t *uiop, int *eofp) 5114 { 5115 gfs_readdir_state_t gstate; 5116 int error, eof = 0; 5117 offset_t n; 5118 proc_t *p; 5119 int pslot; 5120 int fddirsize; 5121 uf_info_t *fip; 5122 5123 ASSERT(pnp->pr_type == PR_FDDIR); 5124 5125 if ((error = prlock(pnp, ZNO)) != 0) 5126 return (error); 5127 p = pnp->pr_common->prc_proc; 5128 pslot = p->p_slot; 5129 fip = P_FINFO(p); 5130 mutex_exit(&p->p_lock); 5131 5132 if ((error = gfs_readdir_init(&gstate, PLNSIZ, PRSDSIZE, uiop, 5133 pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_FDDIR), 0)) != 0) { 5134 mutex_enter(&p->p_lock); 5135 prunlock(pnp); 5136 return (error); 5137 } 5138 5139 mutex_enter(&fip->fi_lock); 5140 if ((p->p_flag & SSYS) || p->p_as == &kas) 5141 fddirsize = 0; 5142 else 5143 fddirsize = fip->fi_nfiles; 5144 5145 /* 5146 * Loop until user's request is satisfied or until 5147 * all file descriptors have been examined. 5148 */ 5149 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 5150 /* 5151 * Find next fd. 5152 */ 5153 while (n < fddirsize && fip->fi_list[n].uf_file == NULL) 5154 n++; 5155 /* 5156 * Stop when all fds have been reported. 5157 */ 5158 if (n >= fddirsize) { 5159 eof = 1; 5160 break; 5161 } 5162 5163 error = gfs_readdir_emitn(&gstate, uiop, n, 5164 pmkino(n, pslot, PR_FD), n); 5165 if (error) 5166 break; 5167 } 5168 5169 mutex_exit(&fip->fi_lock); 5170 mutex_enter(&p->p_lock); 5171 prunlock(pnp); 5172 5173 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5174 } 5175 5176 /* ARGSUSED */ 5177 static int 5178 pr_readdir_pathdir(prnode_t *pnp, uio_t *uiop, int *eofp) 5179 { 5180 longlong_t bp[DIRENT64_RECLEN(64) / sizeof (longlong_t)]; 5181 dirent64_t *dirent = (dirent64_t *)bp; 5182 int reclen; 5183 ssize_t oresid; 5184 offset_t off, idx; 5185 int error = 0; 5186 proc_t *p; 5187 int fd, obj; 5188 int pslot; 5189 int fddirsize; 5190 uf_info_t *fip; 5191 struct as *as = NULL; 5192 size_t objdirsize; 5193 vattr_t vattr; 5194 vnode_t *vp; 5195 5196 ASSERT(pnp->pr_type == PR_PATHDIR); 5197 5198 if (uiop->uio_offset < 0 || 5199 uiop->uio_resid <= 0 || 5200 (uiop->uio_offset % PRSDSIZE) != 0) 5201 return (EINVAL); 5202 oresid = uiop->uio_resid; 5203 bzero(bp, sizeof (bp)); 5204 5205 if ((error = prlock(pnp, ZNO)) != 0) 5206 return (error); 5207 p = pnp->pr_common->prc_proc; 5208 fip = P_FINFO(p); 5209 pslot = p->p_slot; 5210 mutex_exit(&p->p_lock); 5211 5212 if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { 5213 as = NULL; 5214 objdirsize = 0; 5215 } else { 5216 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 5217 if (as->a_updatedir) 5218 rebuild_objdir(as); 5219 objdirsize = as->a_sizedir; 5220 AS_LOCK_EXIT(as, &as->a_lock); 5221 as = NULL; 5222 } 5223 5224 mutex_enter(&fip->fi_lock); 5225 if ((p->p_flag & SSYS) || p->p_as == &kas) 5226 fddirsize = 0; 5227 else 5228 fddirsize = fip->fi_nfiles; 5229 5230 for (; uiop->uio_resid > 0; uiop->uio_offset = off + PRSDSIZE) { 5231 /* 5232 * There are 4 special files in the path directory: ".", "..", 5233 * "root", and "cwd". We handle those specially here. 5234 */ 5235 off = uiop->uio_offset; 5236 idx = off / PRSDSIZE; 5237 if (off == 0) { /* "." */ 5238 dirent->d_ino = pmkino(0, pslot, PR_PATHDIR); 5239 dirent->d_name[0] = '.'; 5240 dirent->d_name[1] = '\0'; 5241 reclen = DIRENT64_RECLEN(1); 5242 } else if (idx == 1) { /* ".." */ 5243 dirent->d_ino = pmkino(0, pslot, PR_PIDDIR); 5244 dirent->d_name[0] = '.'; 5245 dirent->d_name[1] = '.'; 5246 dirent->d_name[2] = '\0'; 5247 reclen = DIRENT64_RECLEN(2); 5248 } else if (idx == 2) { /* "root" */ 5249 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5250 (void) strcpy(dirent->d_name, "root"); 5251 reclen = DIRENT64_RECLEN(4); 5252 } else if (idx == 3) { /* "cwd" */ 5253 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5254 (void) strcpy(dirent->d_name, "cwd"); 5255 reclen = DIRENT64_RECLEN(3); 5256 } else if (idx < 4 + fddirsize) { 5257 /* 5258 * In this case, we have one of the file descriptors. 5259 */ 5260 fd = idx - 4; 5261 if (fip->fi_list[fd].uf_file == NULL) 5262 continue; 5263 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5264 (void) pr_u32tos(fd, dirent->d_name, PLNSIZ+1); 5265 reclen = DIRENT64_RECLEN(PLNSIZ); 5266 } else if (idx < 4 + fddirsize + objdirsize) { 5267 if (fip != NULL) { 5268 mutex_exit(&fip->fi_lock); 5269 fip = NULL; 5270 } 5271 5272 /* 5273 * We drop p_lock before grabbing the address space lock 5274 * in order to avoid a deadlock with the clock thread. 5275 * The process will not disappear and its address space 5276 * will not change because it is marked P_PR_LOCK. 5277 */ 5278 if (as == NULL) { 5279 as = p->p_as; 5280 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 5281 } 5282 5283 if (as->a_updatedir) { 5284 rebuild_objdir(as); 5285 objdirsize = as->a_sizedir; 5286 } 5287 5288 obj = idx - 4 - fddirsize; 5289 if ((vp = obj_entry(as, obj)) == NULL) 5290 continue; 5291 vattr.va_mask = AT_FSID|AT_NODEID; 5292 if (VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) != 0) 5293 continue; 5294 if (vp == p->p_exec) 5295 (void) strcpy(dirent->d_name, "a.out"); 5296 else 5297 pr_object_name(dirent->d_name, vp, &vattr); 5298 dirent->d_ino = pmkino(idx, pslot, PR_PATH); 5299 reclen = DIRENT64_RECLEN(strlen(dirent->d_name)); 5300 } else { 5301 break; 5302 } 5303 5304 dirent->d_off = uiop->uio_offset + PRSDSIZE; 5305 dirent->d_reclen = (ushort_t)reclen; 5306 if (reclen > uiop->uio_resid) { 5307 /* 5308 * Error if no entries have been returned yet. 5309 */ 5310 if (uiop->uio_resid == oresid) 5311 error = EINVAL; 5312 break; 5313 } 5314 /* 5315 * Drop the address space lock to do the uiomove(). 5316 */ 5317 if (as != NULL) 5318 AS_LOCK_EXIT(as, &as->a_lock); 5319 5320 error = uiomove((caddr_t)dirent, reclen, UIO_READ, uiop); 5321 if (as != NULL) 5322 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER); 5323 5324 if (error) 5325 break; 5326 } 5327 5328 if (error == 0 && eofp) 5329 *eofp = (uiop->uio_offset >= (fddirsize + 2) * PRSDSIZE); 5330 5331 if (fip != NULL) 5332 mutex_exit(&fip->fi_lock); 5333 if (as != NULL) 5334 AS_LOCK_EXIT(as, &as->a_lock); 5335 mutex_enter(&p->p_lock); 5336 prunlock(pnp); 5337 return (error); 5338 } 5339 5340 static int 5341 pr_readdir_tmpldir(prnode_t *pnp, uio_t *uiop, int *eofp) 5342 { 5343 proc_t *p; 5344 int pslot, tslot; 5345 gfs_readdir_state_t gstate; 5346 int error, eof = 0; 5347 offset_t n; 5348 5349 ASSERT(pnp->pr_type == PR_TMPLDIR); 5350 5351 if ((error = prlock(pnp, ZNO)) != 0) 5352 return (error); 5353 p = pnp->pr_common->prc_proc; 5354 pslot = pnp->pr_common->prc_slot; 5355 tslot = pnp->pr_common->prc_tslot; 5356 mutex_exit(&p->p_lock); 5357 5358 if ((error = gfs_readdir_init(&gstate, PRDIRSIZE, PRSDSIZE, uiop, 5359 pmkino(tslot, pslot, PR_LWPDIR), 5360 pmkino(tslot, pslot, PR_TMPLDIR), 0)) != 0) { 5361 mutex_enter(&p->p_lock); 5362 prunlock(pnp); 5363 return (error); 5364 } 5365 5366 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 5367 /* 5368 * Check for an active template. Reading a directory's 5369 * contents is already racy, so we don't bother taking 5370 * any locks. 5371 */ 5372 while (n < ct_ntypes && 5373 pnp->pr_common->prc_thread->t_lwp->lwp_ct_active[n] == NULL) 5374 n++; 5375 /* 5376 * Stop when all types have been reported. 5377 */ 5378 if (n >= ct_ntypes) { 5379 eof = 1; 5380 break; 5381 } 5382 /* 5383 * The pmkino invocation below will need to be updated 5384 * when we create our fifth contract type. 5385 */ 5386 ASSERT(ct_ntypes <= 4); 5387 error = gfs_readdir_emit(&gstate, uiop, n, 5388 pmkino((tslot << 2) | n, pslot, PR_TMPL), 5389 ct_types[n]->ct_type_name, 0); 5390 if (error) 5391 break; 5392 } 5393 5394 mutex_enter(&p->p_lock); 5395 prunlock(pnp); 5396 5397 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5398 } 5399 5400 static int 5401 pr_readdir_ctdir(prnode_t *pnp, uio_t *uiop, int *eofp) 5402 { 5403 proc_t *p; 5404 int pslot; 5405 gfs_readdir_state_t gstate; 5406 int error, eof = 0; 5407 offset_t n; 5408 uint64_t zid; 5409 5410 ASSERT(pnp->pr_type == PR_CTDIR); 5411 5412 if ((error = prlock(pnp, ZNO)) != 0) 5413 return (error); 5414 p = pnp->pr_common->prc_proc; 5415 pslot = p->p_slot; 5416 mutex_exit(&p->p_lock); 5417 5418 if ((error = gfs_readdir_init(&gstate, PRDIRSIZE, PRSDSIZE, uiop, 5419 pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_CTDIR), 0)) != 0) { 5420 mutex_enter(&p->p_lock); 5421 prunlock(pnp); 5422 return (error); 5423 } 5424 5425 zid = VTOZONE(pnp->pr_vnode)->zone_uniqid; 5426 while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { 5427 id_t next = contract_plookup(p, n, zid); 5428 if (next == -1) { 5429 eof = 1; 5430 break; 5431 } 5432 error = gfs_readdir_emitn(&gstate, uiop, next, 5433 pmkino(next, pslot, PR_CT), next); 5434 if (error) 5435 break; 5436 } 5437 5438 mutex_enter(&p->p_lock); 5439 prunlock(pnp); 5440 5441 return (gfs_readdir_fini(&gstate, error, eofp, eof)); 5442 } 5443 5444 /* ARGSUSED */ 5445 static int 5446 prfsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 5447 { 5448 return (0); 5449 } 5450 5451 /* 5452 * Utility: remove a /proc vnode from a linked list, threaded through pr_next. 5453 */ 5454 static void 5455 pr_list_unlink(vnode_t *pvp, vnode_t **listp) 5456 { 5457 vnode_t *vp; 5458 prnode_t *pnp; 5459 5460 while ((vp = *listp) != NULL) { 5461 pnp = VTOP(vp); 5462 if (vp == pvp) { 5463 *listp = pnp->pr_next; 5464 pnp->pr_next = NULL; 5465 break; 5466 } 5467 listp = &pnp->pr_next; 5468 } 5469 } 5470 5471 /* ARGSUSED */ 5472 static void 5473 prinactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 5474 { 5475 prnode_t *pnp = VTOP(vp); 5476 prnodetype_t type = pnp->pr_type; 5477 proc_t *p; 5478 vnode_t *dp; 5479 vnode_t *ovp = NULL; 5480 prnode_t *opnp = NULL; 5481 5482 switch (type) { 5483 case PR_OBJECT: 5484 case PR_FD: 5485 case PR_SELF: 5486 case PR_PATH: 5487 /* These are not linked into the usual lists */ 5488 ASSERT(vp->v_count == 1); 5489 if ((dp = pnp->pr_parent) != NULL) 5490 VN_RELE(dp); 5491 prfreenode(pnp); 5492 return; 5493 default: 5494 break; 5495 } 5496 5497 mutex_enter(&pr_pidlock); 5498 if (pnp->pr_pcommon == NULL) 5499 p = NULL; 5500 else if ((p = pnp->pr_pcommon->prc_proc) != NULL) 5501 mutex_enter(&p->p_lock); 5502 mutex_enter(&vp->v_lock); 5503 5504 if (type == PR_PROCDIR || vp->v_count > 1) { 5505 vp->v_count--; 5506 mutex_exit(&vp->v_lock); 5507 if (p != NULL) 5508 mutex_exit(&p->p_lock); 5509 mutex_exit(&pr_pidlock); 5510 return; 5511 } 5512 5513 if ((dp = pnp->pr_parent) != NULL) { 5514 prnode_t *dpnp; 5515 5516 switch (type) { 5517 case PR_PIDFILE: 5518 case PR_LWPIDFILE: 5519 case PR_OPAGEDATA: 5520 break; 5521 default: 5522 dpnp = VTOP(dp); 5523 mutex_enter(&dpnp->pr_mutex); 5524 if (dpnp->pr_files != NULL && 5525 dpnp->pr_files[pnp->pr_index] == vp) 5526 dpnp->pr_files[pnp->pr_index] = NULL; 5527 mutex_exit(&dpnp->pr_mutex); 5528 break; 5529 } 5530 pnp->pr_parent = NULL; 5531 } 5532 5533 ASSERT(vp->v_count == 1); 5534 5535 /* 5536 * If we allocated an old /proc/pid node, free it too. 5537 */ 5538 if (pnp->pr_pidfile != NULL) { 5539 ASSERT(type == PR_PIDDIR); 5540 ovp = pnp->pr_pidfile; 5541 opnp = VTOP(ovp); 5542 ASSERT(opnp->pr_type == PR_PIDFILE); 5543 pnp->pr_pidfile = NULL; 5544 } 5545 5546 mutex_exit(&pr_pidlock); 5547 5548 if (p != NULL) { 5549 /* 5550 * Remove the vnodes from the lists of 5551 * /proc vnodes for the process. 5552 */ 5553 int slot; 5554 5555 switch (type) { 5556 case PR_PIDDIR: 5557 pr_list_unlink(vp, &p->p_trace); 5558 break; 5559 case PR_LWPIDDIR: 5560 if ((slot = pnp->pr_common->prc_tslot) != -1) { 5561 lwpent_t *lep = p->p_lwpdir[slot].ld_entry; 5562 pr_list_unlink(vp, &lep->le_trace); 5563 } 5564 break; 5565 default: 5566 pr_list_unlink(vp, &p->p_plist); 5567 break; 5568 } 5569 if (ovp != NULL) 5570 pr_list_unlink(ovp, &p->p_plist); 5571 mutex_exit(&p->p_lock); 5572 } 5573 5574 mutex_exit(&vp->v_lock); 5575 5576 if (type == PR_CT && pnp->pr_contract != NULL) { 5577 contract_rele(pnp->pr_contract); 5578 pnp->pr_contract = NULL; 5579 } 5580 5581 if (opnp != NULL) 5582 prfreenode(opnp); 5583 prfreenode(pnp); 5584 if (dp != NULL) { 5585 VN_RELE(dp); 5586 } 5587 } 5588 5589 /* ARGSUSED */ 5590 static int 5591 prseek(vnode_t *vp, offset_t ooff, offset_t *noffp, caller_context_t *ct) 5592 { 5593 return (0); 5594 } 5595 5596 /* 5597 * We use the p_execdir member of proc_t to expand the %d token in core file 5598 * paths (the directory path for the executable that dumped core; see 5599 * coreadm(1M) for details). We'd like gcore(1) to be able to expand %d in 5600 * the same way as core dumping from the kernel, but there's no convenient 5601 * and comprehensible way to export the path name for p_execdir. To solve 5602 * this, we try to find the actual path to the executable that was used. In 5603 * pr_lookup_pathdir(), we mark the a.out path name vnode with the PR_AOUT 5604 * flag, and use that here to indicate that more work is needed beyond the 5605 * call to vnodetopath(). 5606 */ 5607 static int 5608 prreadlink_lookup(prnode_t *pnp, char *buf, size_t size, cred_t *cr) 5609 { 5610 proc_t *p; 5611 vnode_t *vp, *execvp, *vrootp; 5612 int ret; 5613 size_t len; 5614 dirent64_t *dp; 5615 size_t dlen = DIRENT64_RECLEN(MAXPATHLEN); 5616 char *dbuf; 5617 5618 p = curproc; 5619 mutex_enter(&p->p_lock); 5620 if ((vrootp = PTOU(p)->u_rdir) == NULL) 5621 vrootp = rootdir; 5622 VN_HOLD(vrootp); 5623 mutex_exit(&p->p_lock); 5624 5625 ret = vnodetopath(vrootp, pnp->pr_realvp, buf, size, cr); 5626 5627 /* 5628 * If PR_AOUT isn't set, then we looked up the path for the vnode; 5629 * otherwise, we looked up the path for (what we believe to be) the 5630 * containing directory. 5631 */ 5632 if ((pnp->pr_flags & PR_AOUT) == 0) { 5633 VN_RELE(vrootp); 5634 return (ret); 5635 } 5636 5637 /* 5638 * Fail if there's a problem locking the process. This will only 5639 * occur if the process is changing so the information we would 5640 * report would already be invalid. 5641 */ 5642 if (prlock(pnp, ZNO) != 0) { 5643 VN_RELE(vrootp); 5644 return (EIO); 5645 } 5646 5647 p = pnp->pr_common->prc_proc; 5648 mutex_exit(&p->p_lock); 5649 5650 execvp = p->p_exec; 5651 VN_HOLD(execvp); 5652 5653 /* 5654 * If our initial lookup of the directory failed, fall back to 5655 * the path name information for p_exec. 5656 */ 5657 if (ret != 0) { 5658 mutex_enter(&p->p_lock); 5659 prunlock(pnp); 5660 ret = vnodetopath(vrootp, execvp, buf, size, cr); 5661 VN_RELE(execvp); 5662 VN_RELE(vrootp); 5663 return (ret); 5664 } 5665 5666 len = strlen(buf); 5667 5668 /* 5669 * We use u_comm as a guess for the last component of the full 5670 * executable path name. If there isn't going to be enough space 5671 * we fall back to using the p_exec so that we can have _an_ 5672 * answer even if it's not perfect. 5673 */ 5674 if (strlen(PTOU(p)->u_comm) + len + 1 < size) { 5675 buf[len] = '/'; 5676 (void) strcpy(buf + len + 1, PTOU(p)->u_comm); 5677 mutex_enter(&p->p_lock); 5678 prunlock(pnp); 5679 5680 /* 5681 * Do a forward lookup of our u_comm guess. 5682 */ 5683 if (lookupnameat(buf + len + 1, UIO_SYSSPACE, FOLLOW, NULLVPP, 5684 &vp, pnp->pr_realvp) == 0) { 5685 if (vn_compare(vp, execvp)) { 5686 VN_RELE(vp); 5687 VN_RELE(execvp); 5688 VN_RELE(vrootp); 5689 return (0); 5690 } 5691 5692 VN_RELE(vp); 5693 } 5694 } else { 5695 mutex_enter(&p->p_lock); 5696 prunlock(pnp); 5697 } 5698 5699 dbuf = kmem_alloc(dlen, KM_SLEEP); 5700 5701 /* 5702 * Try to find a matching vnode by iterating through the directory's 5703 * entries. If that fails, fall back to the path information for 5704 * p_exec. 5705 */ 5706 if ((ret = dirfindvp(vrootp, pnp->pr_realvp, execvp, cr, dbuf, 5707 dlen, &dp)) == 0 && strlen(dp->d_name) + len + 1 < size) { 5708 buf[len] = '/'; 5709 (void) strcpy(buf + len + 1, dp->d_name); 5710 } else { 5711 ret = vnodetopath(vrootp, execvp, buf, size, cr); 5712 } 5713 5714 kmem_free(dbuf, dlen); 5715 VN_RELE(execvp); 5716 VN_RELE(vrootp); 5717 5718 return (ret); 5719 } 5720 5721 /* ARGSUSED */ 5722 static int 5723 prreadlink(vnode_t *vp, uio_t *uiop, cred_t *cr, caller_context_t *ctp) 5724 { 5725 prnode_t *pnp = VTOP(vp); 5726 char *buf; 5727 int ret = EINVAL; 5728 char idbuf[16]; 5729 int length, rlength; 5730 contract_t *ct; 5731 5732 switch (pnp->pr_type) { 5733 case PR_SELF: 5734 (void) snprintf(idbuf, sizeof (idbuf), "%d", curproc->p_pid); 5735 ret = uiomove(idbuf, strlen(idbuf), UIO_READ, uiop); 5736 break; 5737 case PR_OBJECT: 5738 case PR_FD: 5739 case PR_CURDIR: 5740 case PR_ROOTDIR: 5741 if (pnp->pr_realvp->v_type == VDIR) 5742 ret = 0; 5743 break; 5744 case PR_PATH: 5745 buf = kmem_alloc(MAXPATHLEN, KM_SLEEP); 5746 5747 if ((ret = prreadlink_lookup(pnp, buf, MAXPATHLEN, cr)) == 0) 5748 ret = uiomove(buf, strlen(buf), UIO_READ, uiop); 5749 5750 kmem_free(buf, MAXPATHLEN); 5751 break; 5752 case PR_CT: 5753 ASSERT(pnp->pr_contract != NULL); 5754 ct = pnp->pr_contract; 5755 length = sizeof (CTFS_ROOT "//") + sizeof (idbuf) + 5756 strlen(ct->ct_type->ct_type_name); 5757 buf = kmem_alloc(length, KM_SLEEP); 5758 rlength = snprintf(buf, length, CTFS_ROOT "/%s/%d", 5759 ct->ct_type->ct_type_name, ct->ct_id); 5760 ASSERT(rlength < length); 5761 ret = uiomove(buf, rlength, UIO_READ, uiop); 5762 kmem_free(buf, length); 5763 break; 5764 default: 5765 break; 5766 } 5767 5768 return (ret); 5769 } 5770 5771 /*ARGSUSED2*/ 5772 static int 5773 prcmp(vnode_t *vp1, vnode_t *vp2, caller_context_t *ct) 5774 { 5775 prnode_t *pp1, *pp2; 5776 5777 if (vp1 == vp2) 5778 return (1); 5779 5780 if (!vn_matchops(vp1, prvnodeops) || !vn_matchops(vp2, prvnodeops)) 5781 return (0); 5782 5783 pp1 = VTOP(vp1); 5784 pp2 = VTOP(vp2); 5785 5786 if (pp1->pr_type != pp2->pr_type) 5787 return (0); 5788 if (pp1->pr_type == PR_PROCDIR) 5789 return (1); 5790 if (pp1->pr_ino || pp2->pr_ino) 5791 return (pp2->pr_ino == pp1->pr_ino); 5792 5793 if (pp1->pr_common == NULL || pp2->pr_common == NULL) 5794 return (0); 5795 5796 return (pp1->pr_common->prc_slot == pp2->pr_common->prc_slot && 5797 pp1->pr_common->prc_tslot == pp2->pr_common->prc_tslot); 5798 } 5799 5800 static int 5801 prrealvp(vnode_t *vp, vnode_t **vpp, caller_context_t *ct) 5802 { 5803 vnode_t *rvp; 5804 5805 if ((rvp = VTOP(vp)->pr_realvp) != NULL) { 5806 vp = rvp; 5807 if (VOP_REALVP(vp, &rvp, ct) == 0) 5808 vp = rvp; 5809 } 5810 5811 *vpp = vp; 5812 return (0); 5813 } 5814 5815 /* 5816 * Return the answer requested to poll(). 5817 * POLLIN, POLLRDNORM, and POLLOUT are recognized as in fs_poll(). 5818 * In addition, these have special meaning for /proc files: 5819 * POLLPRI process or lwp stopped on an event of interest 5820 * POLLERR /proc file descriptor is invalid 5821 * POLLHUP process or lwp has terminated 5822 */ 5823 /*ARGSUSED5*/ 5824 static int 5825 prpoll(vnode_t *vp, short events, int anyyet, short *reventsp, 5826 pollhead_t **phpp, caller_context_t *ct) 5827 { 5828 prnode_t *pnp = VTOP(vp); 5829 prcommon_t *pcp = pnp->pr_common; 5830 pollhead_t *php = &pcp->prc_pollhead; 5831 proc_t *p; 5832 short revents; 5833 int error; 5834 int lockstate; 5835 5836 ASSERT(pnp->pr_type < PR_NFILES); 5837 5838 /* 5839 * Support for old /proc interface. 5840 */ 5841 if (pnp->pr_pidfile != NULL) { 5842 vp = pnp->pr_pidfile; 5843 pnp = VTOP(vp); 5844 ASSERT(pnp->pr_type == PR_PIDFILE); 5845 ASSERT(pnp->pr_common == pcp); 5846 } 5847 5848 *reventsp = revents = 0; 5849 *phpp = (pollhead_t *)NULL; 5850 5851 if (vp->v_type == VDIR) { 5852 *reventsp |= POLLNVAL; 5853 return (0); 5854 } 5855 5856 lockstate = pollunlock(); /* avoid deadlock with prnotify() */ 5857 5858 if ((error = prlock(pnp, ZNO)) != 0) { 5859 pollrelock(lockstate); 5860 switch (error) { 5861 case ENOENT: /* process or lwp died */ 5862 *reventsp = POLLHUP; 5863 error = 0; 5864 break; 5865 case EAGAIN: /* invalidated */ 5866 *reventsp = POLLERR; 5867 error = 0; 5868 break; 5869 } 5870 return (error); 5871 } 5872 5873 /* 5874 * We have the process marked locked (P_PR_LOCK) and we are holding 5875 * its p->p_lock. We want to unmark the process but retain 5876 * exclusive control w.r.t. other /proc controlling processes 5877 * before reacquiring the polling locks. 5878 * 5879 * prunmark() does this for us. It unmarks the process 5880 * but retains p->p_lock so we still have exclusive control. 5881 * We will drop p->p_lock at the end to relinquish control. 5882 * 5883 * We cannot call prunlock() at the end to relinquish control 5884 * because prunlock(), like prunmark(), may drop and reacquire 5885 * p->p_lock and that would lead to a lock order violation 5886 * w.r.t. the polling locks we are about to reacquire. 5887 */ 5888 p = pcp->prc_proc; 5889 ASSERT(p != NULL); 5890 prunmark(p); 5891 5892 pollrelock(lockstate); /* reacquire dropped poll locks */ 5893 5894 if ((p->p_flag & SSYS) || p->p_as == &kas) 5895 revents = POLLNVAL; 5896 else { 5897 short ev; 5898 5899 if ((ev = (events & (POLLIN|POLLRDNORM))) != 0) 5900 revents |= ev; 5901 /* 5902 * POLLWRNORM (same as POLLOUT) really should not be 5903 * used to indicate that the process or lwp stopped. 5904 * However, USL chose to use POLLWRNORM rather than 5905 * POLLPRI to indicate this, so we just accept either 5906 * requested event to indicate stopped. (grr...) 5907 */ 5908 if ((ev = (events & (POLLPRI|POLLOUT|POLLWRNORM))) != 0) { 5909 kthread_t *t; 5910 5911 if (pcp->prc_flags & PRC_LWP) { 5912 t = pcp->prc_thread; 5913 ASSERT(t != NULL); 5914 thread_lock(t); 5915 } else { 5916 t = prchoose(p); /* returns locked t */ 5917 ASSERT(t != NULL); 5918 } 5919 5920 if (ISTOPPED(t) || VSTOPPED(t)) 5921 revents |= ev; 5922 thread_unlock(t); 5923 } 5924 } 5925 5926 *reventsp = revents; 5927 if (!anyyet && revents == 0) { 5928 /* 5929 * Arrange to wake up the polling lwp when 5930 * the target process/lwp stops or terminates 5931 * or when the file descriptor becomes invalid. 5932 */ 5933 pcp->prc_flags |= PRC_POLL; 5934 *phpp = php; 5935 } 5936 mutex_exit(&p->p_lock); 5937 return (0); 5938 } 5939 5940 /* in prioctl.c */ 5941 extern int prioctl(vnode_t *, int, intptr_t, int, cred_t *, int *, 5942 caller_context_t *); 5943 5944 /* 5945 * /proc vnode operations vector 5946 */ 5947 const fs_operation_def_t pr_vnodeops_template[] = { 5948 VOPNAME_OPEN, { .vop_open = propen }, 5949 VOPNAME_CLOSE, { .vop_close = prclose }, 5950 VOPNAME_READ, { .vop_read = prread }, 5951 VOPNAME_WRITE, { .vop_write = prwrite }, 5952 VOPNAME_IOCTL, { .vop_ioctl = prioctl }, 5953 VOPNAME_GETATTR, { .vop_getattr = prgetattr }, 5954 VOPNAME_ACCESS, { .vop_access = praccess }, 5955 VOPNAME_LOOKUP, { .vop_lookup = prlookup }, 5956 VOPNAME_CREATE, { .vop_create = prcreate }, 5957 VOPNAME_READDIR, { .vop_readdir = prreaddir }, 5958 VOPNAME_READLINK, { .vop_readlink = prreadlink }, 5959 VOPNAME_FSYNC, { .vop_fsync = prfsync }, 5960 VOPNAME_INACTIVE, { .vop_inactive = prinactive }, 5961 VOPNAME_SEEK, { .vop_seek = prseek }, 5962 VOPNAME_CMP, { .vop_cmp = prcmp }, 5963 VOPNAME_FRLOCK, { .error = fs_error }, 5964 VOPNAME_REALVP, { .vop_realvp = prrealvp }, 5965 VOPNAME_POLL, { .vop_poll = prpoll }, 5966 VOPNAME_DISPOSE, { .error = fs_error }, 5967 VOPNAME_SHRLOCK, { .error = fs_error }, 5968 NULL, NULL 5969 }; 5970