1 /* $NetBSD: kernfs_vnops.c,v 1.121 2006/06/07 22:33:41 kardel Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software donated to Berkeley by 8 * Jan-Simon Pendry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95 35 */ 36 37 /* 38 * Kernel parameter filesystem (/kern) 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: kernfs_vnops.c,v 1.121 2006/06/07 22:33:41 kardel Exp $"); 43 44 #ifdef _KERNEL_OPT 45 #include "opt_ipsec.h" 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/vmmeter.h> 52 #include <sys/time.h> 53 #include <sys/proc.h> 54 #include <sys/vnode.h> 55 #include <sys/malloc.h> 56 #include <sys/file.h> 57 #include <sys/stat.h> 58 #include <sys/mount.h> 59 #include <sys/namei.h> 60 #include <sys/buf.h> 61 #include <sys/dirent.h> 62 #include <sys/msgbuf.h> 63 64 #include <miscfs/genfs/genfs.h> 65 #include <miscfs/kernfs/kernfs.h> 66 67 #ifdef IPSEC 68 #include <sys/mbuf.h> 69 #include <net/route.h> 70 #include <netinet/in.h> 71 #include <netinet6/ipsec.h> 72 #include <netkey/key.h> 73 #endif 74 75 #include <uvm/uvm_extern.h> 76 77 #define KSTRING 256 /* Largest I/O available via this filesystem */ 78 #define UIO_MX 32 79 80 #define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) 81 #define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) 82 #define UREAD_MODE (S_IRUSR) 83 #define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) 84 #define UDIR_MODE (S_IRUSR|S_IXUSR) 85 86 #define N(s) sizeof(s)-1, s 87 const struct kern_target kern_targets[] = { 88 /* NOTE: The name must be less than UIO_MX-16 chars in length */ 89 /* name data tag type ro/rw */ 90 { DT_DIR, N("."), 0, KFSkern, VDIR, DIR_MODE }, 91 { DT_DIR, N(".."), 0, KFSroot, VDIR, DIR_MODE }, 92 { DT_REG, N("boottime"), &boottime.tv_sec, KFSint, VREG, READ_MODE }, 93 /* XXXUNCONST */ 94 { DT_REG, N("copyright"), __UNCONST(copyright), 95 KFSstring, VREG, READ_MODE }, 96 { DT_REG, N("hostname"), 0, KFShostname, VREG, WRITE_MODE }, 97 { DT_REG, N("hz"), &hz, KFSint, VREG, READ_MODE }, 98 #ifdef IPSEC 99 { DT_DIR, N("ipsecsa"), 0, KFSipsecsadir, VDIR, UDIR_MODE }, 100 { DT_DIR, N("ipsecsp"), 0, KFSipsecspdir, VDIR, UDIR_MODE }, 101 #endif 102 { DT_REG, N("loadavg"), 0, KFSavenrun, VREG, READ_MODE }, 103 { DT_REG, N("msgbuf"), 0, KFSmsgbuf, VREG, READ_MODE }, 104 { DT_REG, N("pagesize"), &uvmexp.pagesize, KFSint, VREG, READ_MODE }, 105 { DT_REG, N("physmem"), &physmem, KFSint, VREG, READ_MODE }, 106 #if 0 107 { DT_DIR, N("root"), 0, KFSnull, VDIR, DIR_MODE }, 108 #endif 109 { DT_BLK, N("rootdev"), &rootdev, KFSdevice, VBLK, READ_MODE }, 110 { DT_CHR, N("rrootdev"), &rrootdev, KFSdevice, VCHR, READ_MODE }, 111 { DT_REG, N("time"), 0, KFStime, VREG, READ_MODE }, 112 /* XXXUNCONST */ 113 { DT_REG, N("version"), __UNCONST(version), 114 KFSstring, VREG, READ_MODE }, 115 }; 116 const struct kern_target subdir_targets[] = { 117 /* NOTE: The name must be less than UIO_MX-16 chars in length */ 118 /* name data tag type ro/rw */ 119 { DT_DIR, N("."), 0, KFSsubdir, VDIR, DIR_MODE }, 120 { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE }, 121 }; 122 #ifdef IPSEC 123 const struct kern_target ipsecsa_targets[] = { 124 /* NOTE: The name must be less than UIO_MX-16 chars in length */ 125 /* name data tag type ro/rw */ 126 { DT_DIR, N("."), 0, KFSipsecsadir, VDIR, DIR_MODE }, 127 { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE }, 128 }; 129 const struct kern_target ipsecsp_targets[] = { 130 /* NOTE: The name must be less than UIO_MX-16 chars in length */ 131 /* name data tag type ro/rw */ 132 { DT_DIR, N("."), 0, KFSipsecspdir, VDIR, DIR_MODE }, 133 { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE }, 134 }; 135 const struct kern_target ipsecsa_kt = 136 { DT_DIR, N(""), 0, KFSipsecsa, VREG, UREAD_MODE }; 137 const struct kern_target ipsecsp_kt = 138 { DT_DIR, N(""), 0, KFSipsecsp, VREG, UREAD_MODE }; 139 #endif 140 #undef N 141 SIMPLEQ_HEAD(,dyn_kern_target) dyn_kern_targets = 142 SIMPLEQ_HEAD_INITIALIZER(dyn_kern_targets); 143 int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); 144 const int static_nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); 145 #ifdef IPSEC 146 int nipsecsa_targets = sizeof(ipsecsa_targets) / sizeof(ipsecsa_targets[0]); 147 int nipsecsp_targets = sizeof(ipsecsp_targets) / sizeof(ipsecsp_targets[0]); 148 int nkern_dirs = 4; /* 2 extra subdirs */ 149 #else 150 int nkern_dirs = 2; 151 #endif 152 153 int kernfs_try_fileop(kfstype, kfsfileop, void *, int); 154 int kernfs_try_xread(kfstype, const struct kernfs_node *, char *, 155 size_t, int); 156 int kernfs_try_xwrite(kfstype, const struct kernfs_node *, char *, 157 size_t, int); 158 159 static int kernfs_default_xread(void *v); 160 static int kernfs_default_xwrite(void *v); 161 static int kernfs_default_fileop_getattr(void *); 162 163 /* must include all fileop's */ 164 const struct kernfs_fileop kernfs_default_fileops[] = { 165 { .kf_fileop = KERNFS_XREAD }, 166 { .kf_fileop = KERNFS_XWRITE }, 167 { .kf_fileop = KERNFS_FILEOP_OPEN }, 168 { .kf_fileop = KERNFS_FILEOP_GETATTR, 169 .kf_genop = {kernfs_default_fileop_getattr} }, 170 { .kf_fileop = KERNFS_FILEOP_IOCTL }, 171 { .kf_fileop = KERNFS_FILEOP_CLOSE }, 172 { .kf_fileop = KERNFS_FILEOP_READ, .kf_genop = {kernfs_default_xread} }, 173 { .kf_fileop = KERNFS_FILEOP_WRITE, .kf_genop = {kernfs_default_xwrite} }, 174 }; 175 176 int kernfs_lookup(void *); 177 #define kernfs_create genfs_eopnotsupp 178 #define kernfs_mknod genfs_eopnotsupp 179 int kernfs_open(void *); 180 int kernfs_close(void *); 181 int kernfs_access(void *); 182 int kernfs_getattr(void *); 183 int kernfs_setattr(void *); 184 int kernfs_read(void *); 185 int kernfs_write(void *); 186 #define kernfs_fcntl genfs_fcntl 187 int kernfs_ioctl(void *); 188 #define kernfs_poll genfs_poll 189 #define kernfs_revoke genfs_revoke 190 #define kernfs_fsync genfs_nullop 191 #define kernfs_seek genfs_nullop 192 #define kernfs_remove genfs_eopnotsupp 193 int kernfs_link(void *); 194 #define kernfs_rename genfs_eopnotsupp 195 #define kernfs_mkdir genfs_eopnotsupp 196 #define kernfs_rmdir genfs_eopnotsupp 197 int kernfs_symlink(void *); 198 int kernfs_readdir(void *); 199 #define kernfs_readlink genfs_eopnotsupp 200 #define kernfs_abortop genfs_abortop 201 int kernfs_inactive(void *); 202 int kernfs_reclaim(void *); 203 #define kernfs_lock genfs_lock 204 #define kernfs_unlock genfs_unlock 205 #define kernfs_bmap genfs_badop 206 #define kernfs_strategy genfs_badop 207 int kernfs_print(void *); 208 #define kernfs_islocked genfs_islocked 209 int kernfs_pathconf(void *); 210 #define kernfs_advlock genfs_einval 211 #define kernfs_bwrite genfs_eopnotsupp 212 #define kernfs_putpages genfs_putpages 213 214 static int kernfs_xread(struct kernfs_node *, int, char **, 215 size_t, size_t *); 216 static int kernfs_xwrite(const struct kernfs_node *, char *, size_t); 217 218 int (**kernfs_vnodeop_p)(void *); 219 const struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { 220 { &vop_default_desc, vn_default_error }, 221 { &vop_lookup_desc, kernfs_lookup }, /* lookup */ 222 { &vop_create_desc, kernfs_create }, /* create */ 223 { &vop_mknod_desc, kernfs_mknod }, /* mknod */ 224 { &vop_open_desc, kernfs_open }, /* open */ 225 { &vop_close_desc, kernfs_close }, /* close */ 226 { &vop_access_desc, kernfs_access }, /* access */ 227 { &vop_getattr_desc, kernfs_getattr }, /* getattr */ 228 { &vop_setattr_desc, kernfs_setattr }, /* setattr */ 229 { &vop_read_desc, kernfs_read }, /* read */ 230 { &vop_write_desc, kernfs_write }, /* write */ 231 { &vop_fcntl_desc, kernfs_fcntl }, /* fcntl */ 232 { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ 233 { &vop_poll_desc, kernfs_poll }, /* poll */ 234 { &vop_revoke_desc, kernfs_revoke }, /* revoke */ 235 { &vop_fsync_desc, kernfs_fsync }, /* fsync */ 236 { &vop_seek_desc, kernfs_seek }, /* seek */ 237 { &vop_remove_desc, kernfs_remove }, /* remove */ 238 { &vop_link_desc, kernfs_link }, /* link */ 239 { &vop_rename_desc, kernfs_rename }, /* rename */ 240 { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ 241 { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ 242 { &vop_symlink_desc, kernfs_symlink }, /* symlink */ 243 { &vop_readdir_desc, kernfs_readdir }, /* readdir */ 244 { &vop_readlink_desc, kernfs_readlink }, /* readlink */ 245 { &vop_abortop_desc, kernfs_abortop }, /* abortop */ 246 { &vop_inactive_desc, kernfs_inactive }, /* inactive */ 247 { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ 248 { &vop_lock_desc, kernfs_lock }, /* lock */ 249 { &vop_unlock_desc, kernfs_unlock }, /* unlock */ 250 { &vop_bmap_desc, kernfs_bmap }, /* bmap */ 251 { &vop_strategy_desc, kernfs_strategy }, /* strategy */ 252 { &vop_print_desc, kernfs_print }, /* print */ 253 { &vop_islocked_desc, kernfs_islocked }, /* islocked */ 254 { &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */ 255 { &vop_advlock_desc, kernfs_advlock }, /* advlock */ 256 { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ 257 { &vop_putpages_desc, kernfs_putpages }, /* putpages */ 258 { NULL, NULL } 259 }; 260 const struct vnodeopv_desc kernfs_vnodeop_opv_desc = 261 { &kernfs_vnodeop_p, kernfs_vnodeop_entries }; 262 263 static inline int 264 kernfs_fileop_compare(struct kernfs_fileop *a, struct kernfs_fileop *b) 265 { 266 if (a->kf_type < b->kf_type) 267 return -1; 268 if (a->kf_type > b->kf_type) 269 return 1; 270 if (a->kf_fileop < b->kf_fileop) 271 return -1; 272 if (a->kf_fileop > b->kf_fileop) 273 return 1; 274 return (0); 275 } 276 277 SPLAY_HEAD(kfsfileoptree, kernfs_fileop) kfsfileoptree = 278 SPLAY_INITIALIZER(kfsfileoptree); 279 SPLAY_PROTOTYPE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); 280 SPLAY_GENERATE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); 281 282 kfstype 283 kernfs_alloctype(int nkf, const struct kernfs_fileop *kf) 284 { 285 static u_char nextfreetype = KFSlasttype; 286 struct kernfs_fileop *dkf, *fkf, skf; 287 int i; 288 289 /* XXX need to keep track of dkf's memory if we support 290 deallocating types */ 291 dkf = malloc(sizeof(kernfs_default_fileops), M_TEMP, M_WAITOK); 292 memcpy(dkf, kernfs_default_fileops, sizeof(kernfs_default_fileops)); 293 294 for (i = 0; i < sizeof(kernfs_default_fileops) / 295 sizeof(kernfs_default_fileops[0]); i++) { 296 dkf[i].kf_type = nextfreetype; 297 SPLAY_INSERT(kfsfileoptree, &kfsfileoptree, &dkf[i]); 298 } 299 300 for (i = 0; i < nkf; i++) { 301 skf.kf_type = nextfreetype; 302 skf.kf_fileop = kf[i].kf_fileop; 303 if ((fkf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) 304 fkf->kf_genop = kf[i].kf_genop; 305 } 306 307 return nextfreetype++; 308 } 309 310 int 311 kernfs_try_fileop(kfstype type, kfsfileop fileop, void *v, int error) 312 { 313 struct kernfs_fileop *kf, skf; 314 315 skf.kf_type = type; 316 skf.kf_fileop = fileop; 317 if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) 318 if (kf->kf_vop) 319 return kf->kf_vop(v); 320 return error; 321 } 322 323 int 324 kernfs_try_xwrite(kfstype type, const struct kernfs_node *kfs, char *bf, 325 size_t len, int error) 326 { 327 struct kernfs_fileop *kf, skf; 328 329 skf.kf_type = type; 330 skf.kf_fileop = KERNFS_XWRITE; 331 if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) 332 if (kf->kf_xwrite) 333 return kf->kf_xwrite(kfs, bf, len); 334 return error; 335 } 336 337 int 338 kernfs_addentry(kernfs_parentdir_t *pkt, kernfs_entry_t *dkt) 339 { 340 struct kernfs_subdir *ks, *parent; 341 342 if (pkt == NULL) { 343 SIMPLEQ_INSERT_TAIL(&dyn_kern_targets, dkt, dkt_queue); 344 nkern_targets++; 345 if (dkt->dkt_kt.kt_vtype == VDIR) 346 nkern_dirs++; 347 } else { 348 parent = (struct kernfs_subdir *)pkt->kt_data; 349 SIMPLEQ_INSERT_TAIL(&parent->ks_entries, dkt, dkt_queue); 350 parent->ks_nentries++; 351 if (dkt->dkt_kt.kt_vtype == VDIR) 352 parent->ks_dirs++; 353 } 354 if (dkt->dkt_kt.kt_vtype == VDIR && dkt->dkt_kt.kt_data == NULL) { 355 ks = malloc(sizeof(struct kernfs_subdir), 356 M_TEMP, M_WAITOK); 357 SIMPLEQ_INIT(&ks->ks_entries); 358 ks->ks_nentries = 2; /* . and .. */ 359 ks->ks_dirs = 2; 360 ks->ks_parent = pkt ? pkt : &kern_targets[0]; 361 dkt->dkt_kt.kt_data = ks; 362 } 363 return 0; 364 } 365 366 static int 367 kernfs_xread(kfs, off, bufp, len, wrlen) 368 struct kernfs_node *kfs; 369 int off; 370 char **bufp; 371 size_t len; 372 size_t *wrlen; 373 { 374 const struct kern_target *kt; 375 #ifdef IPSEC 376 struct mbuf *m; 377 #endif 378 379 kt = kfs->kfs_kt; 380 381 switch (kfs->kfs_type) { 382 case KFStime: { 383 struct timeval tv; 384 385 microtime(&tv); 386 snprintf(*bufp, len, "%ld %ld\n", tv.tv_sec, tv.tv_usec); 387 break; 388 } 389 390 case KFSint: { 391 int *ip = kt->kt_data; 392 393 snprintf(*bufp, len, "%d\n", *ip); 394 break; 395 } 396 397 case KFSstring: { 398 char *cp = kt->kt_data; 399 400 *bufp = cp; 401 break; 402 } 403 404 case KFSmsgbuf: { 405 long n; 406 407 /* 408 * deal with cases where the message buffer has 409 * become corrupted. 410 */ 411 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 412 msgbufenabled = 0; 413 return (ENXIO); 414 } 415 416 /* 417 * Note that reads of /kern/msgbuf won't necessarily yield 418 * consistent results, if the message buffer is modified 419 * while the read is in progress. The worst that can happen 420 * is that incorrect data will be read. There's no way 421 * that this can crash the system unless the values in the 422 * message buffer header are corrupted, but that'll cause 423 * the system to die anyway. 424 */ 425 if (off >= msgbufp->msg_bufs) { 426 *wrlen = 0; 427 return (0); 428 } 429 n = msgbufp->msg_bufx + off; 430 if (n >= msgbufp->msg_bufs) 431 n -= msgbufp->msg_bufs; 432 len = min(msgbufp->msg_bufs - n, msgbufp->msg_bufs - off); 433 *bufp = msgbufp->msg_bufc + n; 434 *wrlen = len; 435 return (0); 436 } 437 438 case KFShostname: { 439 char *cp = hostname; 440 int xlen = hostnamelen; 441 442 if (xlen >= (len - 2)) 443 return (EINVAL); 444 445 memcpy(*bufp, cp, xlen); 446 (*bufp)[xlen] = '\n'; 447 (*bufp)[xlen+1] = '\0'; 448 len = strlen(*bufp); 449 break; 450 } 451 452 case KFSavenrun: 453 averunnable.fscale = FSCALE; 454 snprintf(*bufp, len, "%d %d %d %ld\n", 455 averunnable.ldavg[0], averunnable.ldavg[1], 456 averunnable.ldavg[2], averunnable.fscale); 457 break; 458 459 #ifdef IPSEC 460 case KFSipsecsa: 461 /* 462 * Note that SA configuration could be changed during the 463 * read operation, resulting in garbled output. 464 */ 465 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 466 if (!m) 467 return (ENOBUFS); 468 if (off >= m->m_pkthdr.len) { 469 *wrlen = 0; 470 m_freem(m); 471 return (0); 472 } 473 if (len > m->m_pkthdr.len - off) 474 len = m->m_pkthdr.len - off; 475 m_copydata(m, off, len, *bufp); 476 *wrlen = len; 477 m_freem(m); 478 return (0); 479 480 case KFSipsecsp: 481 /* 482 * Note that SP configuration could be changed during the 483 * read operation, resulting in garbled output. 484 */ 485 if (!kfs->kfs_v) { 486 struct secpolicy *sp; 487 488 sp = key_getspbyid(kfs->kfs_value); 489 if (sp) 490 kfs->kfs_v = sp; 491 else 492 return (ENOENT); 493 } 494 m = key_setdumpsp((struct secpolicy *)kfs->kfs_v, 495 SADB_X_SPDGET, 0, 0); 496 if (!m) 497 return (ENOBUFS); 498 if (off >= m->m_pkthdr.len) { 499 *wrlen = 0; 500 m_freem(m); 501 return (0); 502 } 503 if (len > m->m_pkthdr.len - off) 504 len = m->m_pkthdr.len - off; 505 m_copydata(m, off, len, *bufp); 506 *wrlen = len; 507 m_freem(m); 508 return (0); 509 #endif 510 511 default: 512 *wrlen = 0; 513 return (0); 514 } 515 516 len = strlen(*bufp); 517 if (len <= off) 518 *wrlen = 0; 519 else { 520 *bufp += off; 521 *wrlen = len - off; 522 } 523 return (0); 524 } 525 526 static int 527 kernfs_xwrite(kfs, bf, len) 528 const struct kernfs_node *kfs; 529 char *bf; 530 size_t len; 531 { 532 533 switch (kfs->kfs_type) { 534 case KFShostname: 535 if (bf[len-1] == '\n') 536 --len; 537 memcpy(hostname, bf, len); 538 hostname[len] = '\0'; 539 hostnamelen = (size_t) len; 540 return (0); 541 542 default: 543 return kernfs_try_xwrite(kfs->kfs_type, kfs, bf, len, EIO); 544 } 545 } 546 547 548 /* 549 * vp is the current namei directory 550 * ndp is the name to locate in that directory... 551 */ 552 int 553 kernfs_lookup(v) 554 void *v; 555 { 556 struct vop_lookup_args /* { 557 struct vnode * a_dvp; 558 struct vnode ** a_vpp; 559 struct componentname * a_cnp; 560 } */ *ap = v; 561 struct componentname *cnp = ap->a_cnp; 562 struct vnode **vpp = ap->a_vpp; 563 struct vnode *dvp = ap->a_dvp; 564 const char *pname = cnp->cn_nameptr; 565 const struct kernfs_node *kfs; 566 const struct kern_target *kt; 567 const struct dyn_kern_target *dkt; 568 const struct kernfs_subdir *ks; 569 int error, i, wantpunlock; 570 #ifdef IPSEC 571 char *ep; 572 u_int32_t id; 573 #endif 574 575 *vpp = NULLVP; 576 cnp->cn_flags &= ~PDIRUNLOCK; 577 578 if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) 579 return (EROFS); 580 581 if (cnp->cn_namelen == 1 && *pname == '.') { 582 *vpp = dvp; 583 VREF(dvp); 584 return (0); 585 } 586 587 wantpunlock = (~cnp->cn_flags & (LOCKPARENT | ISLASTCN)); 588 kfs = VTOKERN(dvp); 589 switch (kfs->kfs_type) { 590 case KFSkern: 591 /* 592 * Shouldn't get here with .. in the root node. 593 */ 594 if (cnp->cn_flags & ISDOTDOT) 595 return (EIO); 596 597 for (i = 0; i < static_nkern_targets; i++) { 598 kt = &kern_targets[i]; 599 if (cnp->cn_namelen == kt->kt_namlen && 600 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 601 goto found; 602 } 603 SIMPLEQ_FOREACH(dkt, &dyn_kern_targets, dkt_queue) { 604 if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && 605 memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { 606 kt = &dkt->dkt_kt; 607 goto found; 608 } 609 } 610 break; 611 612 found: 613 error = kernfs_allocvp(dvp->v_mount, vpp, kt->kt_tag, kt, 0); 614 if ((error == 0) && wantpunlock) { 615 VOP_UNLOCK(dvp, 0); 616 cnp->cn_flags |= PDIRUNLOCK; 617 } 618 return (error); 619 620 case KFSsubdir: 621 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 622 if (cnp->cn_flags & ISDOTDOT) { 623 kt = ks->ks_parent; 624 goto found; 625 } 626 627 SIMPLEQ_FOREACH(dkt, &ks->ks_entries, dkt_queue) { 628 if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && 629 memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { 630 kt = &dkt->dkt_kt; 631 goto found; 632 } 633 } 634 break; 635 636 #ifdef IPSEC 637 case KFSipsecsadir: 638 if (cnp->cn_flags & ISDOTDOT) { 639 kt = &kern_targets[0]; 640 goto found; 641 } 642 643 for (i = 2; i < nipsecsa_targets; i++) { 644 kt = &ipsecsa_targets[i]; 645 if (cnp->cn_namelen == kt->kt_namlen && 646 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 647 goto found; 648 } 649 650 ep = NULL; 651 id = strtoul(pname, &ep, 10); 652 if (!ep || *ep || ep == pname) 653 break; 654 655 error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsa, &ipsecsa_kt, id); 656 if ((error == 0) && wantpunlock) { 657 VOP_UNLOCK(dvp, 0); 658 cnp->cn_flags |= PDIRUNLOCK; 659 } 660 return (error); 661 662 case KFSipsecspdir: 663 if (cnp->cn_flags & ISDOTDOT) { 664 kt = &kern_targets[0]; 665 goto found; 666 } 667 668 for (i = 2; i < nipsecsp_targets; i++) { 669 kt = &ipsecsp_targets[i]; 670 if (cnp->cn_namelen == kt->kt_namlen && 671 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 672 goto found; 673 } 674 675 ep = NULL; 676 id = strtoul(pname, &ep, 10); 677 if (!ep || *ep || ep == pname) 678 break; 679 680 error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsp, &ipsecsp_kt, id); 681 if ((error == 0) && wantpunlock) { 682 VOP_UNLOCK(dvp, 0); 683 cnp->cn_flags |= PDIRUNLOCK; 684 } 685 return (error); 686 #endif 687 688 default: 689 return (ENOTDIR); 690 } 691 692 return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); 693 } 694 695 int 696 kernfs_open(v) 697 void *v; 698 { 699 struct vop_open_args /* { 700 struct vnode *a_vp; 701 int a_mode; 702 kauth_cred_t a_cred; 703 struct lwp *a_l; 704 } */ *ap = v; 705 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 706 #ifdef IPSEC 707 struct mbuf *m; 708 struct secpolicy *sp; 709 #endif 710 711 switch (kfs->kfs_type) { 712 #ifdef IPSEC 713 case KFSipsecsa: 714 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 715 if (m) { 716 m_freem(m); 717 return (0); 718 } else 719 return (ENOENT); 720 721 case KFSipsecsp: 722 sp = key_getspbyid(kfs->kfs_value); 723 if (sp) { 724 kfs->kfs_v = sp; 725 return (0); 726 } else 727 return (ENOENT); 728 #endif 729 730 default: 731 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_OPEN, 732 v, 0); 733 } 734 } 735 736 int 737 kernfs_close(v) 738 void *v; 739 { 740 struct vop_close_args /* { 741 struct vnode *a_vp; 742 int a_fflag; 743 kauth_cred_t a_cred; 744 struct lwp *a_l; 745 } */ *ap = v; 746 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 747 748 switch (kfs->kfs_type) { 749 #ifdef IPSEC 750 case KFSipsecsp: 751 key_freesp((struct secpolicy *)kfs->kfs_v); 752 break; 753 #endif 754 755 default: 756 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_CLOSE, 757 v, 0); 758 } 759 760 return (0); 761 } 762 763 int 764 kernfs_access(v) 765 void *v; 766 { 767 struct vop_access_args /* { 768 struct vnode *a_vp; 769 int a_mode; 770 kauth_cred_t a_cred; 771 struct lwp *a_l; 772 } */ *ap = v; 773 struct vattr va; 774 int error; 775 776 if ((error = VOP_GETATTR(ap->a_vp, &va, ap->a_cred, ap->a_l)) != 0) 777 return (error); 778 779 return (vaccess(va.va_type, va.va_mode, va.va_uid, va.va_gid, 780 ap->a_mode, ap->a_cred)); 781 } 782 783 static int 784 kernfs_default_fileop_getattr(v) 785 void *v; 786 { 787 struct vop_getattr_args /* { 788 struct vnode *a_vp; 789 struct vattr *a_vap; 790 kauth_cred_t a_cred; 791 struct lwp *a_l; 792 } */ *ap = v; 793 struct vattr *vap = ap->a_vap; 794 795 vap->va_nlink = 1; 796 vap->va_bytes = vap->va_size = 0; 797 798 return 0; 799 } 800 801 int 802 kernfs_getattr(v) 803 void *v; 804 { 805 struct vop_getattr_args /* { 806 struct vnode *a_vp; 807 struct vattr *a_vap; 808 kauth_cred_t a_cred; 809 struct lwp *a_l; 810 } */ *ap = v; 811 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 812 struct kernfs_subdir *ks; 813 struct vattr *vap = ap->a_vap; 814 int error = 0; 815 char strbuf[KSTRING], *bf; 816 size_t nread, total; 817 818 VATTR_NULL(vap); 819 vap->va_type = ap->a_vp->v_type; 820 vap->va_uid = 0; 821 vap->va_gid = 0; 822 vap->va_mode = kfs->kfs_mode; 823 vap->va_fileid = kfs->kfs_fileno; 824 vap->va_flags = 0; 825 vap->va_size = 0; 826 vap->va_blocksize = DEV_BSIZE; 827 /* Make all times be current TOD, except for the "boottime" node. */ 828 if (kfs->kfs_kt && kfs->kfs_kt->kt_namlen == 8 && 829 !memcmp(kfs->kfs_kt->kt_name, "boottime", 8)) { 830 TIMEVAL_TO_TIMESPEC(&boottime, &vap->va_ctime); 831 } else { 832 getnanotime(&vap->va_ctime); 833 } 834 vap->va_atime = vap->va_mtime = vap->va_ctime; 835 vap->va_gen = 0; 836 vap->va_flags = 0; 837 vap->va_rdev = 0; 838 vap->va_bytes = 0; 839 840 switch (kfs->kfs_type) { 841 case KFSkern: 842 vap->va_nlink = nkern_dirs; 843 vap->va_bytes = vap->va_size = DEV_BSIZE; 844 break; 845 846 case KFSroot: 847 vap->va_nlink = 1; 848 vap->va_bytes = vap->va_size = DEV_BSIZE; 849 break; 850 851 case KFSsubdir: 852 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 853 vap->va_nlink = ks->ks_dirs; 854 vap->va_bytes = vap->va_size = DEV_BSIZE; 855 break; 856 857 case KFSnull: 858 case KFStime: 859 case KFSint: 860 case KFSstring: 861 case KFShostname: 862 case KFSavenrun: 863 case KFSdevice: 864 case KFSmsgbuf: 865 #ifdef IPSEC 866 case KFSipsecsa: 867 case KFSipsecsp: 868 #endif 869 vap->va_nlink = 1; 870 total = 0; 871 do { 872 bf = strbuf; 873 error = kernfs_xread(kfs, total, &bf, 874 sizeof(strbuf), &nread); 875 total += nread; 876 } while (error == 0 && nread != 0); 877 vap->va_bytes = vap->va_size = total; 878 break; 879 880 #ifdef IPSEC 881 case KFSipsecsadir: 882 case KFSipsecspdir: 883 vap->va_nlink = 2; 884 vap->va_bytes = vap->va_size = DEV_BSIZE; 885 break; 886 #endif 887 888 default: 889 error = kernfs_try_fileop(kfs->kfs_type, 890 KERNFS_FILEOP_GETATTR, v, EINVAL); 891 break; 892 } 893 894 return (error); 895 } 896 897 /*ARGSUSED*/ 898 int 899 kernfs_setattr(v) 900 void *v; 901 { 902 903 /* 904 * Silently ignore attribute changes. 905 * This allows for open with truncate to have no 906 * effect until some data is written. I want to 907 * do it this way because all writes are atomic. 908 */ 909 return (0); 910 } 911 912 int 913 kernfs_default_xread(v) 914 void *v; 915 { 916 struct vop_read_args /* { 917 struct vnode *a_vp; 918 struct uio *a_uio; 919 int a_ioflag; 920 kauth_cred_t a_cred; 921 } */ *ap = v; 922 struct uio *uio = ap->a_uio; 923 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 924 char strbuf[KSTRING], *bf; 925 int off; 926 size_t len; 927 int error; 928 929 if (ap->a_vp->v_type == VDIR) 930 return (EOPNOTSUPP); 931 932 off = (int)uio->uio_offset; 933 /* Don't allow negative offsets */ 934 if (off < 0) 935 return EINVAL; 936 937 bf = strbuf; 938 if ((error = kernfs_xread(kfs, off, &bf, sizeof(strbuf), &len)) == 0) 939 error = uiomove(bf, len, uio); 940 return (error); 941 } 942 943 int 944 kernfs_read(v) 945 void *v; 946 { 947 struct vop_read_args /* { 948 struct vnode *a_vp; 949 struct uio *a_uio; 950 int a_ioflag; 951 struct ucred *a_cred; 952 } */ *ap = v; 953 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 954 955 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_READ, v, 0); 956 } 957 958 static int 959 kernfs_default_xwrite(v) 960 void *v; 961 { 962 struct vop_write_args /* { 963 struct vnode *a_vp; 964 struct uio *a_uio; 965 int a_ioflag; 966 kauth_cred_t a_cred; 967 } */ *ap = v; 968 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 969 struct uio *uio = ap->a_uio; 970 int error, xlen; 971 char strbuf[KSTRING]; 972 973 if (uio->uio_offset != 0) 974 return (EINVAL); 975 976 xlen = min(uio->uio_resid, KSTRING-1); 977 if ((error = uiomove(strbuf, xlen, uio)) != 0) 978 return (error); 979 980 if (uio->uio_resid != 0) 981 return (EIO); 982 983 strbuf[xlen] = '\0'; 984 xlen = strlen(strbuf); 985 return (kernfs_xwrite(kfs, strbuf, xlen)); 986 } 987 988 int 989 kernfs_write(v) 990 void *v; 991 { 992 struct vop_write_args /* { 993 struct vnode *a_vp; 994 struct uio *a_uio; 995 int a_ioflag; 996 kauth_cred_t a_cred; 997 } */ *ap = v; 998 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 999 1000 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_WRITE, v, 0); 1001 } 1002 1003 int 1004 kernfs_ioctl(v) 1005 void *v; 1006 { 1007 struct vop_ioctl_args /* { 1008 const struct vnodeop_desc *a_desc; 1009 struct vnode *a_vp; 1010 u_long a_command; 1011 void *a_data; 1012 int a_fflag; 1013 kauth_cred_t a_cred; 1014 struct lwp *a_l; 1015 } */ *ap = v; 1016 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1017 1018 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_IOCTL, v, 1019 EPASSTHROUGH); 1020 } 1021 1022 static int 1023 kernfs_setdirentfileno_kt(struct dirent *d, const struct kern_target *kt, 1024 u_int32_t value, struct vop_readdir_args *ap) 1025 { 1026 struct kernfs_node *kfs; 1027 struct vnode *vp; 1028 int error; 1029 1030 if ((error = kernfs_allocvp(ap->a_vp->v_mount, &vp, kt->kt_tag, kt, 1031 value)) != 0) 1032 return error; 1033 if (kt->kt_tag == KFSdevice) { 1034 struct vattr va; 1035 1036 error = VOP_GETATTR(vp, &va, ap->a_cred, curlwp); 1037 if (error != 0) { 1038 return error; 1039 } 1040 d->d_fileno = va.va_fileid; 1041 } else { 1042 kfs = VTOKERN(vp); 1043 d->d_fileno = kfs->kfs_fileno; 1044 } 1045 vput(vp); 1046 return 0; 1047 } 1048 1049 static int 1050 kernfs_setdirentfileno(struct dirent *d, off_t entry, 1051 struct kernfs_node *thisdir_kfs, const struct kern_target *parent_kt, 1052 const struct kern_target *kt, struct vop_readdir_args *ap) 1053 { 1054 const struct kern_target *ikt; 1055 int error; 1056 1057 switch (entry) { 1058 case 0: 1059 d->d_fileno = thisdir_kfs->kfs_fileno; 1060 return 0; 1061 case 1: 1062 ikt = parent_kt; 1063 break; 1064 default: 1065 ikt = kt; 1066 break; 1067 } 1068 if (ikt != thisdir_kfs->kfs_kt) { 1069 if ((error = kernfs_setdirentfileno_kt(d, ikt, 0, ap)) != 0) 1070 return error; 1071 } else 1072 d->d_fileno = thisdir_kfs->kfs_fileno; 1073 return 0; 1074 } 1075 1076 int 1077 kernfs_readdir(v) 1078 void *v; 1079 { 1080 struct vop_readdir_args /* { 1081 struct vnode *a_vp; 1082 struct uio *a_uio; 1083 kauth_cred_t a_cred; 1084 int *a_eofflag; 1085 off_t **a_cookies; 1086 int a_*ncookies; 1087 } */ *ap = v; 1088 struct uio *uio = ap->a_uio; 1089 struct dirent d; 1090 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1091 const struct kern_target *kt; 1092 const struct dyn_kern_target *dkt = NULL; 1093 const struct kernfs_subdir *ks; 1094 off_t i, j; 1095 int error; 1096 off_t *cookies = NULL; 1097 int ncookies = 0, n; 1098 #ifdef IPSEC 1099 struct secasvar *sav, *sav2; 1100 struct secpolicy *sp; 1101 #endif 1102 1103 if (uio->uio_resid < UIO_MX) 1104 return (EINVAL); 1105 if (uio->uio_offset < 0) 1106 return (EINVAL); 1107 1108 error = 0; 1109 i = uio->uio_offset; 1110 memset(&d, 0, sizeof(d)); 1111 d.d_reclen = UIO_MX; 1112 ncookies = uio->uio_resid / UIO_MX; 1113 1114 switch (kfs->kfs_type) { 1115 case KFSkern: 1116 if (i >= nkern_targets) 1117 return (0); 1118 1119 if (ap->a_ncookies) { 1120 ncookies = min(ncookies, (nkern_targets - i)); 1121 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1122 M_WAITOK); 1123 *ap->a_cookies = cookies; 1124 } 1125 1126 n = 0; 1127 for (; i < nkern_targets && uio->uio_resid >= UIO_MX; i++) { 1128 if (i < static_nkern_targets) 1129 kt = &kern_targets[i]; 1130 else { 1131 if (dkt == NULL) { 1132 dkt = SIMPLEQ_FIRST(&dyn_kern_targets); 1133 for (j = static_nkern_targets; j < i && 1134 dkt != NULL; j++) 1135 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1136 if (j != i) 1137 break; 1138 } else { 1139 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1140 } 1141 if (dkt == NULL) 1142 break; 1143 kt = &dkt->dkt_kt; 1144 } 1145 if (kt->kt_tag == KFSdevice) { 1146 dev_t *dp = kt->kt_data; 1147 struct vnode *fvp; 1148 1149 if (*dp == NODEV || 1150 !vfinddev(*dp, kt->kt_vtype, &fvp)) 1151 continue; 1152 } 1153 d.d_namlen = kt->kt_namlen; 1154 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1155 &kern_targets[0], kt, ap)) != 0) 1156 break; 1157 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1158 d.d_type = kt->kt_type; 1159 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1160 break; 1161 if (cookies) 1162 *cookies++ = i + 1; 1163 n++; 1164 } 1165 ncookies = n; 1166 break; 1167 1168 case KFSroot: 1169 if (i >= 2) 1170 return 0; 1171 1172 if (ap->a_ncookies) { 1173 ncookies = min(ncookies, (2 - i)); 1174 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1175 M_WAITOK); 1176 *ap->a_cookies = cookies; 1177 } 1178 1179 n = 0; 1180 for (; i < 2 && uio->uio_resid >= UIO_MX; i++) { 1181 kt = &kern_targets[i]; 1182 d.d_namlen = kt->kt_namlen; 1183 d.d_fileno = KERNFS_FILENO(kt, kt->kt_tag, 0); 1184 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1185 d.d_type = kt->kt_type; 1186 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1187 break; 1188 if (cookies) 1189 *cookies++ = i + 1; 1190 n++; 1191 } 1192 ncookies = n; 1193 break; 1194 1195 case KFSsubdir: 1196 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 1197 if (i >= ks->ks_nentries) 1198 return (0); 1199 1200 if (ap->a_ncookies) { 1201 ncookies = min(ncookies, (ks->ks_nentries - i)); 1202 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1203 M_WAITOK); 1204 *ap->a_cookies = cookies; 1205 } 1206 1207 dkt = SIMPLEQ_FIRST(&ks->ks_entries); 1208 for (j = 0; j < i && dkt != NULL; j++) 1209 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1210 n = 0; 1211 for (; i < ks->ks_nentries && uio->uio_resid >= UIO_MX; i++) { 1212 if (i < 2) 1213 kt = &subdir_targets[i]; 1214 else { 1215 /* check if ks_nentries lied to us */ 1216 if (dkt == NULL) 1217 break; 1218 kt = &dkt->dkt_kt; 1219 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1220 } 1221 if (kt->kt_tag == KFSdevice) { 1222 dev_t *dp = kt->kt_data; 1223 struct vnode *fvp; 1224 1225 if (*dp == NODEV || 1226 !vfinddev(*dp, kt->kt_vtype, &fvp)) 1227 continue; 1228 } 1229 d.d_namlen = kt->kt_namlen; 1230 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1231 ks->ks_parent, kt, ap)) != 0) 1232 break; 1233 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1234 d.d_type = kt->kt_type; 1235 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1236 break; 1237 if (cookies) 1238 *cookies++ = i + 1; 1239 n++; 1240 } 1241 ncookies = n; 1242 break; 1243 1244 #ifdef IPSEC 1245 case KFSipsecsadir: 1246 /* count SA in the system */ 1247 n = 0; 1248 TAILQ_FOREACH(sav, &satailq, tailq) { 1249 for (sav2 = TAILQ_FIRST(&satailq); 1250 sav2 != sav; 1251 sav2 = TAILQ_NEXT(sav2, tailq)) { 1252 if (sav->spi == sav2->spi) { 1253 /* multiple SA with same SPI */ 1254 break; 1255 } 1256 } 1257 if (sav == sav2 || sav->spi != sav2->spi) 1258 n++; 1259 } 1260 1261 if (i >= nipsecsa_targets + n) 1262 return (0); 1263 1264 if (ap->a_ncookies) { 1265 ncookies = min(ncookies, (n - i)); 1266 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1267 M_WAITOK); 1268 *ap->a_cookies = cookies; 1269 } 1270 1271 n = 0; 1272 for (; i < nipsecsa_targets && uio->uio_resid >= UIO_MX; i++) { 1273 kt = &ipsecsa_targets[i]; 1274 d.d_namlen = kt->kt_namlen; 1275 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1276 &kern_targets[0], kt, ap)) != 0) 1277 break; 1278 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1279 d.d_type = kt->kt_type; 1280 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1281 break; 1282 if (cookies) 1283 *cookies++ = i + 1; 1284 n++; 1285 } 1286 if (error) { 1287 ncookies = n; 1288 break; 1289 } 1290 1291 TAILQ_FOREACH(sav, &satailq, tailq) { 1292 for (sav2 = TAILQ_FIRST(&satailq); 1293 sav2 != sav; 1294 sav2 = TAILQ_NEXT(sav2, tailq)) { 1295 if (sav->spi == sav2->spi) { 1296 /* multiple SA with same SPI */ 1297 break; 1298 } 1299 } 1300 if (sav != sav2 && sav->spi == sav2->spi) 1301 continue; 1302 if (uio->uio_resid < UIO_MX) 1303 break; 1304 if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsa_kt, 1305 sav->spi, ap)) != 0) 1306 break; 1307 d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), 1308 "%u", ntohl(sav->spi)); 1309 d.d_type = DT_REG; 1310 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1311 break; 1312 if (cookies) 1313 *cookies++ = i + 1; 1314 n++; 1315 i++; 1316 } 1317 ncookies = n; 1318 break; 1319 1320 case KFSipsecspdir: 1321 /* count SP in the system */ 1322 n = 0; 1323 TAILQ_FOREACH(sp, &sptailq, tailq) 1324 n++; 1325 1326 if (i >= nipsecsp_targets + n) 1327 return (0); 1328 1329 if (ap->a_ncookies) { 1330 ncookies = min(ncookies, (n - i)); 1331 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1332 M_WAITOK); 1333 *ap->a_cookies = cookies; 1334 } 1335 1336 n = 0; 1337 for (; i < nipsecsp_targets && uio->uio_resid >= UIO_MX; i++) { 1338 kt = &ipsecsp_targets[i]; 1339 d.d_namlen = kt->kt_namlen; 1340 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1341 &kern_targets[0], kt, ap)) != 0) 1342 break; 1343 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1344 d.d_type = kt->kt_type; 1345 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1346 break; 1347 if (cookies) 1348 *cookies++ = i + 1; 1349 n++; 1350 } 1351 if (error) { 1352 ncookies = n; 1353 break; 1354 } 1355 1356 TAILQ_FOREACH(sp, &sptailq, tailq) { 1357 if (uio->uio_resid < UIO_MX) 1358 break; 1359 if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsp_kt, 1360 sp->id, ap)) != 0) 1361 break; 1362 d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), 1363 "%u", sp->id); 1364 d.d_type = DT_REG; 1365 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1366 break; 1367 if (cookies) 1368 *cookies++ = i + 1; 1369 n++; 1370 i++; 1371 } 1372 ncookies = n; 1373 break; 1374 #endif 1375 1376 default: 1377 error = ENOTDIR; 1378 break; 1379 } 1380 1381 if (ap->a_ncookies) { 1382 if (error) { 1383 if (cookies) 1384 free(*ap->a_cookies, M_TEMP); 1385 *ap->a_ncookies = 0; 1386 *ap->a_cookies = NULL; 1387 } else 1388 *ap->a_ncookies = ncookies; 1389 } 1390 1391 uio->uio_offset = i; 1392 return (error); 1393 } 1394 1395 int 1396 kernfs_inactive(v) 1397 void *v; 1398 { 1399 struct vop_inactive_args /* { 1400 struct vnode *a_vp; 1401 struct lwp *a_l; 1402 } */ *ap = v; 1403 struct vnode *vp = ap->a_vp; 1404 const struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1405 #ifdef IPSEC 1406 struct mbuf *m; 1407 struct secpolicy *sp; 1408 #endif 1409 1410 VOP_UNLOCK(vp, 0); 1411 switch (kfs->kfs_type) { 1412 #ifdef IPSEC 1413 case KFSipsecsa: 1414 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 1415 if (m) 1416 m_freem(m); 1417 else 1418 vgone(vp); 1419 break; 1420 case KFSipsecsp: 1421 sp = key_getspbyid(kfs->kfs_value); 1422 if (sp) 1423 key_freesp(sp); 1424 else { 1425 /* should never happen as we hold a refcnt */ 1426 vgone(vp); 1427 } 1428 break; 1429 #endif 1430 default: 1431 break; 1432 } 1433 return (0); 1434 } 1435 1436 int 1437 kernfs_reclaim(v) 1438 void *v; 1439 { 1440 struct vop_reclaim_args /* { 1441 struct vnode *a_vp; 1442 } */ *ap = v; 1443 1444 return (kernfs_freevp(ap->a_vp)); 1445 } 1446 1447 /* 1448 * Return POSIX pathconf information applicable to special devices. 1449 */ 1450 int 1451 kernfs_pathconf(v) 1452 void *v; 1453 { 1454 struct vop_pathconf_args /* { 1455 struct vnode *a_vp; 1456 int a_name; 1457 register_t *a_retval; 1458 } */ *ap = v; 1459 1460 switch (ap->a_name) { 1461 case _PC_LINK_MAX: 1462 *ap->a_retval = LINK_MAX; 1463 return (0); 1464 case _PC_MAX_CANON: 1465 *ap->a_retval = MAX_CANON; 1466 return (0); 1467 case _PC_MAX_INPUT: 1468 *ap->a_retval = MAX_INPUT; 1469 return (0); 1470 case _PC_PIPE_BUF: 1471 *ap->a_retval = PIPE_BUF; 1472 return (0); 1473 case _PC_CHOWN_RESTRICTED: 1474 *ap->a_retval = 1; 1475 return (0); 1476 case _PC_VDISABLE: 1477 *ap->a_retval = _POSIX_VDISABLE; 1478 return (0); 1479 case _PC_SYNC_IO: 1480 *ap->a_retval = 1; 1481 return (0); 1482 default: 1483 return (EINVAL); 1484 } 1485 /* NOTREACHED */ 1486 } 1487 1488 /* 1489 * Print out the contents of a /dev/fd vnode. 1490 */ 1491 /* ARGSUSED */ 1492 int 1493 kernfs_print(v) 1494 void *v; 1495 { 1496 1497 printf("tag VT_KERNFS, kernfs vnode\n"); 1498 return (0); 1499 } 1500 1501 int 1502 kernfs_link(v) 1503 void *v; 1504 { 1505 struct vop_link_args /* { 1506 struct vnode *a_dvp; 1507 struct vnode *a_vp; 1508 struct componentname *a_cnp; 1509 } */ *ap = v; 1510 1511 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1512 vput(ap->a_dvp); 1513 return (EROFS); 1514 } 1515 1516 int 1517 kernfs_symlink(v) 1518 void *v; 1519 { 1520 struct vop_symlink_args /* { 1521 struct vnode *a_dvp; 1522 struct vnode **a_vpp; 1523 struct componentname *a_cnp; 1524 struct vattr *a_vap; 1525 char *a_target; 1526 } */ *ap = v; 1527 1528 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1529 vput(ap->a_dvp); 1530 return (EROFS); 1531 } 1532