vnode_if.sh revision 1.76
1 #!/bin/sh - 2 copyright="\ 3 /* 4 * Copyright (c) 1992, 1993, 1994, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS \`\`AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 " 32 SCRIPT_ID='$NetBSD: vnode_if.sh,v 1.76 2022/07/18 04:30:30 thorpej Exp $' 33 34 # Script to produce VFS front-end sugar. 35 # 36 # usage: vnode_if.sh srcfile 37 # (where srcfile is currently /sys/kern/vnode_if.src) 38 # 39 40 if [ $# -ne 1 ] ; then 41 echo 'usage: vnode_if.sh srcfile' 42 exit 1 43 fi 44 45 # Name and revision of the source file. 46 src=$1 47 SRC_ID=`head -1 $src | sed -e 's/.*\$\(.*\)\$.*/\1/'` 48 49 # Names of the created files. 50 out_c=vnode_if.c 51 out_rumpc=../rump/librump/rumpvfs/rumpvnode_if.c 52 out_h=../sys/vnode_if.h 53 out_rumph=../rump/include/rump/rumpvnode_if.h 54 55 # generate VNODE_LOCKDEBUG checks (not fully functional) 56 lockdebug=1 57 58 # Awk program (must support nawk extensions) 59 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere. 60 awk=${AWK:-awk} 61 62 # Does this awk have a "toupper" function? (i.e. is it GNU awk) 63 isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null` 64 65 # If this awk does not define "toupper" then define our own. 66 if [ "$isgawk" = TRUE ] ; then 67 # GNU awk provides it. 68 toupper= 69 else 70 # Provide our own toupper() 71 toupper=' 72 function toupper(str) { 73 _toupper_cmd = "echo "str" |tr a-z A-Z" 74 _toupper_cmd | getline _toupper_str; 75 close(_toupper_cmd); 76 return _toupper_str; 77 }' 78 fi 79 80 # 81 # This is the common part of all awk programs that read $src 82 # This parses the input for one function into the arrays: 83 # argdir, argtype, argname, willrele 84 # and calls "doit()" to generate output for the function. 85 # 86 # Input to this parser is pre-processed slightly by sed 87 # so this awk parser doesn't have to work so hard. The 88 # changes done by the sed pre-processing step are: 89 # insert a space between * and pointer name 90 # replace semicolons with spaces 91 # 92 sed_prep='s:\*\([^\*/]\):\* \1:g 93 s/;/ /' 94 awk_parser=' 95 # Comment line 96 /^#/ { next; } 97 # First line of description 98 /^vop_/ { 99 name=$1; 100 args_name=$1; 101 argc=0; 102 have_context=0; 103 is_context=0; 104 ncontext=0; 105 willmake=-1; 106 fstrans=""; 107 do_pre=""; 108 do_post=""; 109 next; 110 } 111 # Last line of description 112 /^}/ { 113 doit(); 114 next; 115 } 116 # Middle lines of description 117 { 118 if ($1 == "VERSION") { 119 args_name=args_name "_v" $2; 120 next; 121 } else if ($1 ~ "^FSTRANS=") { 122 fstrans = $1; 123 sub("FSTRANS=", "", fstrans); 124 next; 125 } else if ($1 ~ "^PRE=") { 126 do_pre = $1; 127 sub("PRE=", "", do_pre); 128 next; 129 } else if ($1 ~ "^POST=") { 130 do_post = $1; 131 sub("POST=", "", do_post); 132 next; 133 } 134 135 if ($1 == "CONTEXT") { 136 # CONTEXT require PRE and POST handlers. 137 if (do_pre == "" || do_post == "") 138 next; 139 is_context=1; 140 have_context=1; 141 } else { 142 if (have_context) { 143 # CONTEXT members must come at the end of 144 # the args structure, so everything else 145 # is ignored. 146 next; 147 } 148 argdir[argc] = $1; 149 } 150 i=2; 151 152 if (is_context == 0) { 153 if ($2 == "LOCKED=EXCL") { 154 lockstate[argc] = "elocked"; 155 i++; 156 } else if ($2 == "LOCKED=YES") { 157 lockstate[argc] = "locked"; 158 i++; 159 } else if ($2 == "LOCKED=NO") { 160 lockstate[argc] = "unlocked"; 161 i++; 162 } else 163 lockstate[argc] = ""; 164 165 if ($2 == "WILLRELE" || 166 $3 == "WILLRELE") { 167 willrele[argc] = 1; 168 i++; 169 } else if ($2 == "WILLPUT" || 170 $3 == "WILLPUT") { 171 willrele[argc] = 3; 172 i++; 173 } else 174 willrele[argc] = 0; 175 176 if ($2 == "WILLMAKE") { 177 willmake=argc; 178 i++; 179 } 180 if (argc == 0 && fstrans == "") { 181 if (lockstate[0] == "locked" || 182 lockstate[0] == "elocked") 183 fstrans = "NO"; 184 else 185 fstrans = "YES"; 186 } 187 } 188 189 # XXX: replace non-portable types for rump. We should really 190 # nuke the types from the kernel, but that is a battle for 191 # another day. 192 at = $i; 193 if (rump) { 194 if (at == "vm_prot_t") 195 at = "int"; 196 if (at == "voff_t") 197 at = "off_t"; 198 if (at == "kauth_cred_t") 199 at = "struct kauth_cred *" 200 if (at == "daddr_t") 201 at = "int64_t" 202 } 203 argtype[argc + ncontext] = at; 204 i++; 205 while (i < NF) { 206 argtype[argc + ncontext] = argtype[argc + ncontext]" "$i; 207 i++; 208 } 209 argname[argc + ncontext] = $i; 210 if (is_context) 211 ncontext++; 212 else 213 argc++; 214 next; 215 } 216 ' 217 218 # This is put before the copyright on each generated file. 219 warning="\ 220 /* @NetBSD@ */ 221 222 /* 223 * Warning: DO NOT EDIT! This file is automatically generated! 224 * (Modifications made here may easily be lost!) 225 * 226 * Created from the file: 227 * ${SRC_ID} 228 * by the script: 229 * ${SCRIPT_ID} 230 */ 231 " 232 233 # This is to satisfy McKusick (get rid of evil spaces 8^) 234 anal_retentive='s:\([^/]\*\) :\1:g' 235 236 do_hfile () { 237 # 238 # Redirect stdout to the H file. 239 # 240 echo "$0: Creating $1" 1>&2 241 exec > $1 242 rump=$2 243 244 # Begin stuff 245 if [ -z "${rump}" ]; then 246 SYS='SYS_' 247 else 248 SYS='RUMP_RUMP' 249 fi 250 echo -n "$warning" | sed -e 's/\$//g;s/@/\$/g;s/ $//' 251 echo "" 252 echo -n "$copyright" 253 echo '' 254 echo "#ifndef _${SYS}VNODE_IF_H_" 255 echo "#define _${SYS}VNODE_IF_H_" 256 [ -z "${rump}" ] && echo " 257 extern const struct vnodeop_desc ${rump}vop_default_desc;" 258 echo 259 260 # Body stuff 261 # This awk program needs toupper() so define it if necessary. 262 sed -e "$sed_prep" $src | $awk -v rump=${rump} "$toupper"' 263 function doit() { 264 name = rump name 265 # Declare arg struct, descriptor. 266 if (!rump) { 267 printf("\n#define %s_DESCOFFSET %d\n", 268 toupper(name), vop_offset++); 269 printf("struct %s_args {\n", args_name); 270 printf("\tconst struct vnodeop_desc * a_desc;\n"); 271 for (i=0; i<argc; i++) { 272 printf("\t%s a_%s;\n", argtype[i], argname[i]); 273 } 274 for (i=0; i<ncontext; i++) { 275 printf("\t%s ctx_%s;\n", argtype[argc+i], \ 276 argname[argc+i]); 277 } 278 printf("};\n"); 279 printf("extern const struct vnodeop_desc %s_desc;\n", name); 280 } 281 # Prototype it. 282 protoarg = sprintf("int %s(", toupper(name)); 283 protolen = length(protoarg); 284 printf("%s", protoarg); 285 for (i=0; i<argc; i++) { 286 protoarg = sprintf("%s", argtype[i]); 287 if (i < (argc-1)) protoarg = (protoarg ", "); 288 arglen = length(protoarg); 289 if ((protolen + arglen) > 77) { 290 protoarg = ("\n " protoarg); 291 arglen += 4; 292 protolen = 0; 293 } 294 printf("%s", protoarg); 295 protolen += arglen; 296 } 297 printf(");\n"); 298 } 299 BEGIN { 300 vop_offset = 1; # start at 1, to count the 'default' op 301 302 printf("struct buf;\n"); 303 if (rump) { 304 printf("struct flock;\n"); 305 printf("struct knote;\n"); 306 printf("struct vm_page;\n"); 307 printf("struct acl;\n"); 308 printf("\n#include <sys/acl.h>\n"); 309 } 310 printf("\n#ifndef _KERNEL\n#include <stdbool.h>\n#endif\n"); 311 if (rump) 312 printf("\n"); 313 } 314 END { 315 if (!rump) { 316 printf("\n#define VNODE_OPS_COUNT\t%d\n", vop_offset); 317 } 318 } 319 '"$awk_parser" | sed -e "$anal_retentive" 320 321 # End stuff 322 echo '' 323 echo "#endif /* !_${SYS}VNODE_IF_H_ */" 324 } 325 do_hfile $out_h '' 326 do_hfile $out_rumph 'rump_' 327 328 do_cfile () { 329 # 330 # Redirect stdout to the C file. 331 # 332 echo "$0: Creating $1" 1>&2 333 exec > $1 334 rump=$2 335 336 # Begin stuff 337 echo -n "$warning" | sed -e 's/\$//g;s/@/\$/g;s/ $//' 338 echo "" 339 echo -n "$copyright" 340 echo " 341 #include <sys/cdefs.h> 342 __KERNEL_RCSID(0, \"\$NetBSD\$\");" 343 344 if [ -z "${rump}" -a ${lockdebug} -ne 0 ] ; then 345 echo '' 346 echo '#ifdef _KERNEL_OPT' 347 echo '#include "opt_vnode_lockdebug.h"' 348 echo '#endif /* _KERNEL_OPT */' 349 fi 350 351 echo ' 352 #include <sys/param.h> 353 #include <sys/mount.h> 354 #include <sys/buf.h> 355 #include <sys/fcntl.h> 356 #include <sys/vnode.h> 357 #include <sys/lock.h>' 358 [ -z "${rump}" ] && echo '#include <sys/fstrans.h>' 359 [ ! -z "${rump}" ] && echo '#include <rump/rumpvnode_if.h>' \ 360 && echo '#include <rump-sys/kern.h>' 361 362 if [ -z "${rump}" ] ; then 363 echo " 364 enum fst_op { FST_NO, FST_YES, FST_LAZY, FST_TRY }; 365 366 static inline int 367 vop_pre(vnode_t *vp, struct mount **mp, bool *mpsafe, enum fst_op op) 368 { 369 int error; 370 371 *mpsafe = (vp->v_vflag & VV_MPSAFE); 372 373 if (!*mpsafe) { 374 KERNEL_LOCK(1, curlwp); 375 } 376 377 if (op == FST_YES || op == FST_LAZY || op == FST_TRY) { 378 for (;;) { 379 *mp = vp->v_mount; 380 if (op == FST_TRY) { 381 error = fstrans_start_nowait(*mp); 382 if (error) { 383 if (!*mpsafe) { 384 KERNEL_UNLOCK_ONE(curlwp); 385 } 386 return error; 387 } 388 } else if (op == FST_LAZY) { 389 fstrans_start_lazy(*mp); 390 } else { 391 fstrans_start(*mp); 392 } 393 if (__predict_true(*mp == vp->v_mount)) 394 break; 395 fstrans_done(*mp); 396 } 397 } else { 398 *mp = vp->v_mount; 399 } 400 401 return 0; 402 } 403 404 static inline u_quad_t 405 vop_pre_get_size(struct vnode *vp) 406 { 407 mutex_enter(vp->v_interlock); 408 KASSERT(vp->v_size != VSIZENOTSET); 409 u_quad_t rv = (u_quad_t)vp->v_size; 410 mutex_exit(vp->v_interlock); 411 412 return rv; 413 } 414 415 /* 416 * VOP_RMDIR(), VOP_REMOVE(), and VOP_RENAME() need special handling 417 * because they each drop the caller's references on one or more of 418 * their arguments. While there must be an open file descriptor in 419 * associated with a vnode in order for knotes to be attached to it, 420 * that status could change during the course of the operation. So, 421 * for the vnode arguments that are WILLRELE or WILLPUT, we check 422 * pre-op if there are registered knotes, take a hold count if so, 423 * and post-op release the hold after activating any knotes still 424 * associated with the vnode. 425 */ 426 427 #define VOP_POST_KNOTE(thisvp, e, n) \\ 428 do { \\ 429 if (__predict_true((e) == 0)) { \\ 430 /* \\ 431 * VN_KNOTE() does the VN_KEVENT_INTEREST() \\ 432 * check for us. \\ 433 */ \\ 434 VN_KNOTE((thisvp), (n)); \\ 435 } \\ 436 } while (/*CONSTCOND*/0) 437 438 #define VOP_POST_KNOTE_HELD(thisvp, e, n) \\ 439 do { \\ 440 /* \\ 441 * We don't perform a VN_KEVENT_INTEREST() check here; it \\ 442 * was already performed when we did the pre-op work that \\ 443 * caused the vnode to be held in the first place. \\ 444 */ \\ 445 mutex_enter((thisvp)->v_interlock); \\ 446 if (__predict_true((e) == 0)) { \\ 447 knote(&(thisvp)->v_klist->vk_klist, (n)); \\ 448 } \\ 449 holdrelel((thisvp)); \\ 450 mutex_exit((thisvp)->v_interlock); \\ 451 /* \\ 452 * thisvp might be gone now! Don't touch! \\ 453 */ \\ 454 } while (/*CONSTCOND*/0) 455 456 #define vop_create_post(ap, e) \\ 457 VOP_POST_KNOTE((ap)->a_dvp, (e), NOTE_WRITE) 458 459 #define vop_mknod_post(ap, e) \\ 460 VOP_POST_KNOTE((ap)->a_dvp, (e), NOTE_WRITE) 461 462 #define vop_setattr_pre(ap) \\ 463 u_quad_t osize = 0; \\ 464 long vp_events = \\ 465 VN_KEVENT_INTEREST((ap)->a_vp, NOTE_ATTRIB | NOTE_EXTEND) \\ 466 ? NOTE_ATTRIB : 0; \\ 467 bool check_extend = false; \\ 468 if (__predict_false(vp_events != 0 && \\ 469 (ap)->a_vap->va_size != VNOVALSIZE)) { \\ 470 check_extend = true; \\ 471 osize = vop_pre_get_size((ap)->a_vp); \\ 472 } 473 474 #define vop_setattr_post(ap, e) \\ 475 do { \\ 476 if (__predict_false(vp_events != 0)) { \\ 477 if (__predict_false(check_extend && \\ 478 (ap)->a_vap->va_size > osize)) { \\ 479 vp_events |= NOTE_EXTEND; \\ 480 } \\ 481 VOP_POST_KNOTE((ap)->a_vp, (e), vp_events); \\ 482 } \\ 483 } while (/*CONSTCOND*/0) 484 485 #define vop_setacl_post(ap, e) \\ 486 VOP_POST_KNOTE((ap)->a_vp, (e), NOTE_ATTRIB) 487 488 #define vop_link_post(ap, e) \\ 489 do { \\ 490 VOP_POST_KNOTE((ap)->a_dvp, (e), NOTE_WRITE); \\ 491 VOP_POST_KNOTE((ap)->a_vp, (e), NOTE_LINK); \\ 492 } while (/*CONSTCOND*/0) 493 494 #define vop_mkdir_post(ap, e) \\ 495 VOP_POST_KNOTE((ap)->a_dvp, (e), NOTE_WRITE | NOTE_LINK) 496 497 #define vop_remove_pre_common(ap) \\ 498 bool post_event_vp = \\ 499 VN_KEVENT_INTEREST((ap)->a_vp, NOTE_DELETE | NOTE_LINK); \\ 500 if (__predict_false(post_event_vp)) { \\ 501 vhold((ap)->a_vp); \\ 502 } 503 504 #define vop_remove_post_common(ap, e, dn, lc) \\ 505 do { \\ 506 VOP_POST_KNOTE((ap)->a_dvp, (e), (dn)); \\ 507 if (__predict_false(post_event_vp)) { \\ 508 VOP_POST_KNOTE_HELD((ap)->a_vp, (e), \\ 509 (lc) ? NOTE_LINK : NOTE_DELETE); \\ 510 } \\ 511 } while (/*CONSTCOND*/0) 512 513 /* 514 * One could make the argument that VOP_REMOVE() should send NOTE_LINK 515 * on vp if the resulting link count is not zero, but that's not what 516 * the documentation says. 517 * 518 * We could change this easily by passing ap->ctx_vp_new_nlink to 519 * vop_remove_post_common(). 520 */ 521 #define vop_remove_pre(ap) \\ 522 vop_remove_pre_common((ap)); \\ 523 /* \\ 524 * We will assume that the file being removed is deleted unless \\ 525 * the file system tells us otherwise by updating vp_new_nlink. \\ 526 */ \\ 527 (ap)->ctx_vp_new_nlink = 0; 528 529 #define vop_remove_post(ap, e) \\ 530 vop_remove_post_common((ap), (e), NOTE_WRITE, 0) 531 532 #define vop_rmdir_pre(ap) \\ 533 vop_remove_pre_common(ap) 534 535 #define vop_rmdir_post(ap, e) \\ 536 vop_remove_post_common((ap), (e), NOTE_WRITE | NOTE_LINK, 0) 537 538 #define vop_symlink_post(ap, e) \\ 539 VOP_POST_KNOTE((ap)->a_dvp, (e), NOTE_WRITE) 540 541 #define vop_open_post(ap, e) \\ 542 VOP_POST_KNOTE((ap)->a_vp, (e), NOTE_OPEN) 543 544 #define vop_close_post(ap, e) \\ 545 do { \\ 546 extern int (**dead_vnodeop_p)(void *); \\ 547 \\ 548 /* See the definition of VN_KNOTE() in <sys/vnode.h>. */ \\ 549 if (__predict_false(VN_KEVENT_INTEREST((ap)->a_vp, \\ 550 NOTE_CLOSE_WRITE | NOTE_CLOSE) && (e) == 0)) { \\ 551 struct vnode *thisvp = (ap)->a_vp; \\ 552 mutex_enter(thisvp->v_interlock); \\ 553 /* \\ 554 * Don't send NOTE_CLOSE when closing a vnode that's \\ 555 * been reclaimed or otherwise revoked; a NOTE_REVOKE \\ 556 * has already been sent, and this close is effectively \\ 557 * meaningless from the watcher's perspective. \\ 558 */ \\ 559 if (__predict_true(thisvp->v_op != dead_vnodeop_p)) { \\ 560 knote(&thisvp->v_klist->vk_klist, \\ 561 ((ap)->a_fflag & FWRITE) \\ 562 ? NOTE_CLOSE_WRITE : NOTE_CLOSE); \\ 563 } \\ 564 mutex_exit(thisvp->v_interlock); \\ 565 } \\ 566 } while (/*CONSTCOND*/0) 567 568 #define vop_read_post(ap, e) \\ 569 VOP_POST_KNOTE((ap)->a_vp, (e), NOTE_READ) 570 571 #define vop_write_pre(ap) \\ 572 off_t ooffset = 0, noffset = 0; \\ 573 u_quad_t osize = 0; \\ 574 long vp_events = \\ 575 VN_KEVENT_INTEREST((ap)->a_vp, NOTE_WRITE | NOTE_EXTEND) \\ 576 ? NOTE_WRITE : 0; \\ 577 if (__predict_false(vp_events != 0)) { \\ 578 ooffset = (ap)->a_uio->uio_offset; \\ 579 osize = vop_pre_get_size((ap)->a_vp); \\ 580 } 581 582 #define vop_write_post(ap, e) \\ 583 do { \\ 584 /* \\ 585 * If any data was written, we'll post an event, even if \\ 586 * there was an error. \\ 587 */ \\ 588 noffset = (ap)->a_uio->uio_offset; \\ 589 if (__predict_false(vp_events != 0 && noffset > ooffset)) { \\ 590 if (noffset > osize) { \\ 591 vp_events |= NOTE_EXTEND; \\ 592 } \\ 593 VN_KNOTE((ap)->a_vp, vp_events); \\ 594 } \\ 595 } while (/*CONSTCOND*/0) 596 597 static inline void 598 vop_post(vnode_t *vp, struct mount *mp, bool mpsafe, enum fst_op op) 599 { 600 601 if (op == FST_YES || op == FST_LAZY) { 602 fstrans_done(mp); 603 } 604 605 if (!mpsafe) { 606 KERNEL_UNLOCK_ONE(curlwp); 607 } 608 } 609 610 static inline void 611 assert_vop_unlocked(vnode_t *vp, const char *str) 612 { 613 #if defined(VNODE_LOCKDEBUG) 614 615 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) 616 panic(\"%s: %p %d/%d is locked but should not be\", 617 str, vp, vp->v_tag, vp->v_type); 618 #endif 619 } 620 621 static inline void 622 assert_vop_locked(vnode_t *vp, const char *str) 623 { 624 #if defined(VNODE_LOCKDEBUG) 625 626 if (VOP_ISLOCKED(vp) == LK_NONE) 627 panic(\"%s: %p %d/%d is not locked but should be\", 628 str, vp, vp->v_tag, vp->v_type); 629 #endif 630 } 631 632 static inline void 633 assert_vop_elocked(vnode_t *vp, const char *str) 634 { 635 #if defined(VNODE_LOCKDEBUG) 636 637 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) 638 panic(\"%s: %p %d/%d is not exclusive locked but should be\", 639 str, vp, vp->v_tag, vp->v_type); 640 #endif 641 } 642 643 const struct vnodeop_desc vop_default_desc = {" 644 echo ' 0, 645 "default", 646 0, 647 NULL, 648 VDESC_NO_OFFSET, 649 VDESC_NO_OFFSET, 650 VDESC_NO_OFFSET, 651 }; 652 ' 653 fi 654 655 # Body stuff 656 sed -e "$sed_prep" $src | $awk -v rump=${rump} -v lockdebug=${lockdebug} ' 657 function do_offset(typematch) { 658 for (i=0; i<argc; i++) { 659 if (argtype[i] == typematch) { 660 printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n", 661 args_name, argname[i]); 662 return i; 663 }; 664 }; 665 print "\tVDESC_NO_OFFSET,"; 666 return -1; 667 } 668 669 function offsets() { 670 # Define offsets array 671 printf("const int %s_vp_offsets[] = {\n", name); 672 for (i=0; i<argc; i++) { 673 if (argtype[i] == "struct vnode *") { 674 printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n", 675 args_name, argname[i]); 676 } 677 } 678 print "\tVDESC_NO_OFFSET"; 679 print "};"; 680 # Define F_desc 681 printf("const struct vnodeop_desc %s_desc = {\n", name); 682 # offset 683 printf ("\t%s_DESCOFFSET,\n", toupper(name)); 684 # printable name 685 printf ("\t\"%s\",\n", name); 686 # flags 687 printf("\t0"); 688 vpnum = 0; 689 for (i=0; i<argc; i++) { 690 if (willrele[i]) { 691 if (willrele[i] == 3) { 692 word = "PUT"; 693 } else { 694 word = "RELE"; 695 } 696 printf(" | VDESC_VP%s_WILL%s", vpnum, word); 697 } 698 if (argtype[i] == "struct vnode *") 699 vpnum++; 700 } 701 print ","; 702 # vp offsets 703 printf ("\t%s_vp_offsets,\n", name); 704 # vpp (if any) 705 do_offset("struct vnode **"); 706 # cred (if any) 707 do_offset("kauth_cred_t"); 708 # componentname 709 do_offset("struct componentname *"); 710 printf ("};\n"); 711 } 712 713 function bodyrump() { 714 printf("{\n\tint error;\n\n"); 715 printf("\trump_schedule();\n"); 716 printf("\terror = %s(", toupper(name)); 717 for (i=0; i<argc; i++) { 718 printf("%s", argname[i]); 719 if (i < (argc-1)) printf(", "); 720 } 721 printf(");\n"); 722 printf("\trump_unschedule();\n\n"); 723 printf("\treturn error;\n}\n"); 724 } 725 726 function bodynorm() { 727 printf("{\n\tint error;\n\tbool mpsafe;\n\tstruct %s_args a;\n", 728 args_name); 729 printf("\tstruct mount *mp;\n"); 730 printf("\ta.a_desc = VDESC(%s);\n", name); 731 for (i=0; i<argc; i++) { 732 printf("\ta.a_%s = %s;\n", argname[i], argname[i]); 733 } 734 if (lockdebug) { 735 for (i=0; i<argc; i++) { 736 if (lockstate[i] == "") 737 continue; 738 printf("\tassert_vop_%s(%s, \"%s: %s\");\n", 739 lockstate[i], argname[i], name, argname[i]); 740 } 741 } 742 # This is done before generic vop_pre() because we want 743 # to do any setup before beginning an fstrans. 744 if (do_pre != "") 745 printf("\t%s(&a);\n", do_pre); 746 if (fstrans == "LOCK") 747 printf("\terror = vop_pre(%s, &mp, &mpsafe, %s);\n", 748 argname[0], "(!(flags & (LK_SHARED|LK_EXCLUSIVE)) ? FST_NO : (flags & LK_NOWAIT ? FST_TRY : FST_YES))"); 749 else if (fstrans == "UNLOCK") 750 printf("\terror = vop_pre(%s, &mp, &mpsafe, FST_%s);\n", 751 argname[0], "NO"); 752 else 753 printf("\terror = vop_pre(%s, &mp, &mpsafe, FST_%s);\n", 754 argname[0], fstrans); 755 printf("\tif (error)\n\t\treturn error;\n"); 756 printf("\terror = (VCALL(%s, VOFFSET(%s), &a));\n", 757 argname[0], name); 758 if (fstrans == "LOCK") 759 printf("\tvop_post(%s, mp, mpsafe, %s);\n", 760 argname[0], "(flags & (LK_UPGRADE|LK_DOWNGRADE) ? FST_NO : (error ? FST_YES : FST_NO))"); 761 else if (fstrans == "UNLOCK") 762 printf("\tvop_post(%s, mp, mpsafe, FST_%s);\n", 763 argname[0], "YES"); 764 else 765 printf("\tvop_post(%s, mp, mpsafe, FST_%s);\n", 766 argname[0], fstrans); 767 # This is done after generic vop_post() in order to minimize 768 # time spent with the KERNEL_LOCK held for file systems that 769 # still require it. 770 if (do_post != "") 771 printf("\t%s(&a, error);\n", do_post); 772 if (willmake != -1) { 773 printf("#ifdef DIAGNOSTIC\n"); 774 printf("\tif (error == 0)\n" \ 775 "\t\tKASSERT((*%s)->v_size != VSIZENOTSET\n" \ 776 "\t\t && (*%s)->v_writesize != VSIZENOTSET);\n", 777 argname[willmake], argname[willmake]); 778 printf("#endif /* DIAGNOSTIC */\n"); 779 } 780 printf("\treturn error;\n}\n"); 781 } 782 783 function doit() { 784 printf("\n"); 785 if (!rump) 786 offsets(); 787 788 if (rump) 789 extname = "RUMP_" toupper(name); 790 else 791 extname = toupper(name); 792 793 # Define function. 794 printf("int\n%s(", extname); 795 for (i=0; i<argc; i++) { 796 printf("%s %s", argtype[i], argname[i]); 797 if (i < (argc-1)) printf(",\n "); 798 } 799 printf(")\n"); 800 801 if (rump) 802 bodyrump(); 803 else 804 bodynorm(); 805 } 806 BEGIN { 807 # start from 1 (vop_default is at 0) 808 argc=1; 809 } 810 '"$awk_parser" | sed -e "$anal_retentive" 811 812 # End stuff 813 [ -n "${rump}" ] && return 814 815 # Add the vfs_op_descs array to the C file. 816 # Begin stuff 817 echo " 818 const struct vnodeop_desc * const ${rump}vfs_op_descs[] = { 819 &${rump}vop_default_desc, /* MUST BE FIRST */ 820 " 821 822 # Body stuff 823 sed -e "$sed_prep" $src | $awk -v rump=${rump} ' 824 function doit() { 825 printf("\t&%s_desc,\n", name); 826 } 827 '"$awk_parser" 828 829 # End stuff 830 echo ' NULL 831 };' 832 } 833 do_cfile $out_c '' 834 do_cfile $out_rumpc 'rump_' 835 836 exit 0 837 838 # Local Variables: 839 # tab-width: 4 840 # End: 841
Indexes created Thu Oct 02 10:09:58 GMT 2025