1 /* $NetBSD: kernfs_vnops.c,v 1.125 2006/06/23 20:54:21 christos 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 1.125 2006/06/23 20:54:21 christos 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_vop = kernfs_default_fileop_getattr }, 170 { .kf_fileop = KERNFS_FILEOP_IOCTL }, 171 { .kf_fileop = KERNFS_FILEOP_CLOSE }, 172 { .kf_fileop = KERNFS_FILEOP_READ, 173 .kf_vop = kernfs_default_xread }, 174 { .kf_fileop = KERNFS_FILEOP_WRITE, 175 .kf_vop = kernfs_default_xwrite }, 176 }; 177 178 int kernfs_lookup(void *); 179 #define kernfs_create genfs_eopnotsupp 180 #define kernfs_mknod genfs_eopnotsupp 181 int kernfs_open(void *); 182 int kernfs_close(void *); 183 int kernfs_access(void *); 184 int kernfs_getattr(void *); 185 int kernfs_setattr(void *); 186 int kernfs_read(void *); 187 int kernfs_write(void *); 188 #define kernfs_fcntl genfs_fcntl 189 int kernfs_ioctl(void *); 190 #define kernfs_poll genfs_poll 191 #define kernfs_revoke genfs_revoke 192 #define kernfs_fsync genfs_nullop 193 #define kernfs_seek genfs_nullop 194 #define kernfs_remove genfs_eopnotsupp 195 int kernfs_link(void *); 196 #define kernfs_rename genfs_eopnotsupp 197 #define kernfs_mkdir genfs_eopnotsupp 198 #define kernfs_rmdir genfs_eopnotsupp 199 int kernfs_symlink(void *); 200 int kernfs_readdir(void *); 201 #define kernfs_readlink genfs_eopnotsupp 202 #define kernfs_abortop genfs_abortop 203 int kernfs_inactive(void *); 204 int kernfs_reclaim(void *); 205 #define kernfs_lock genfs_lock 206 #define kernfs_unlock genfs_unlock 207 #define kernfs_bmap genfs_badop 208 #define kernfs_strategy genfs_badop 209 int kernfs_print(void *); 210 #define kernfs_islocked genfs_islocked 211 int kernfs_pathconf(void *); 212 #define kernfs_advlock genfs_einval 213 #define kernfs_bwrite genfs_eopnotsupp 214 #define kernfs_putpages genfs_putpages 215 216 static int kernfs_xread(struct kernfs_node *, int, char **, 217 size_t, size_t *); 218 static int kernfs_xwrite(const struct kernfs_node *, char *, size_t); 219 220 int (**kernfs_vnodeop_p)(void *); 221 const struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { 222 { &vop_default_desc, vn_default_error }, 223 { &vop_lookup_desc, kernfs_lookup }, /* lookup */ 224 { &vop_create_desc, kernfs_create }, /* create */ 225 { &vop_mknod_desc, kernfs_mknod }, /* mknod */ 226 { &vop_open_desc, kernfs_open }, /* open */ 227 { &vop_close_desc, kernfs_close }, /* close */ 228 { &vop_access_desc, kernfs_access }, /* access */ 229 { &vop_getattr_desc, kernfs_getattr }, /* getattr */ 230 { &vop_setattr_desc, kernfs_setattr }, /* setattr */ 231 { &vop_read_desc, kernfs_read }, /* read */ 232 { &vop_write_desc, kernfs_write }, /* write */ 233 { &vop_fcntl_desc, kernfs_fcntl }, /* fcntl */ 234 { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ 235 { &vop_poll_desc, kernfs_poll }, /* poll */ 236 { &vop_revoke_desc, kernfs_revoke }, /* revoke */ 237 { &vop_fsync_desc, kernfs_fsync }, /* fsync */ 238 { &vop_seek_desc, kernfs_seek }, /* seek */ 239 { &vop_remove_desc, kernfs_remove }, /* remove */ 240 { &vop_link_desc, kernfs_link }, /* link */ 241 { &vop_rename_desc, kernfs_rename }, /* rename */ 242 { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ 243 { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ 244 { &vop_symlink_desc, kernfs_symlink }, /* symlink */ 245 { &vop_readdir_desc, kernfs_readdir }, /* readdir */ 246 { &vop_readlink_desc, kernfs_readlink }, /* readlink */ 247 { &vop_abortop_desc, kernfs_abortop }, /* abortop */ 248 { &vop_inactive_desc, kernfs_inactive }, /* inactive */ 249 { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ 250 { &vop_lock_desc, kernfs_lock }, /* lock */ 251 { &vop_unlock_desc, kernfs_unlock }, /* unlock */ 252 { &vop_bmap_desc, kernfs_bmap }, /* bmap */ 253 { &vop_strategy_desc, kernfs_strategy }, /* strategy */ 254 { &vop_print_desc, kernfs_print }, /* print */ 255 { &vop_islocked_desc, kernfs_islocked }, /* islocked */ 256 { &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */ 257 { &vop_advlock_desc, kernfs_advlock }, /* advlock */ 258 { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ 259 { &vop_putpages_desc, kernfs_putpages }, /* putpages */ 260 { NULL, NULL } 261 }; 262 const struct vnodeopv_desc kernfs_vnodeop_opv_desc = 263 { &kernfs_vnodeop_p, kernfs_vnodeop_entries }; 264 265 static inline int 266 kernfs_fileop_compare(struct kernfs_fileop *a, struct kernfs_fileop *b) 267 { 268 if (a->kf_type < b->kf_type) 269 return -1; 270 if (a->kf_type > b->kf_type) 271 return 1; 272 if (a->kf_fileop < b->kf_fileop) 273 return -1; 274 if (a->kf_fileop > b->kf_fileop) 275 return 1; 276 return (0); 277 } 278 279 SPLAY_HEAD(kfsfileoptree, kernfs_fileop) kfsfileoptree = 280 SPLAY_INITIALIZER(kfsfileoptree); 281 SPLAY_PROTOTYPE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); 282 SPLAY_GENERATE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); 283 284 kfstype 285 kernfs_alloctype(int nkf, const struct kernfs_fileop *kf) 286 { 287 static u_char nextfreetype = KFSlasttype; 288 struct kernfs_fileop *dkf, *fkf, skf; 289 int i; 290 291 /* XXX need to keep track of dkf's memory if we support 292 deallocating types */ 293 dkf = malloc(sizeof(kernfs_default_fileops), M_TEMP, M_WAITOK); 294 memcpy(dkf, kernfs_default_fileops, sizeof(kernfs_default_fileops)); 295 296 for (i = 0; i < sizeof(kernfs_default_fileops) / 297 sizeof(kernfs_default_fileops[0]); i++) { 298 dkf[i].kf_type = nextfreetype; 299 SPLAY_INSERT(kfsfileoptree, &kfsfileoptree, &dkf[i]); 300 } 301 302 for (i = 0; i < nkf; i++) { 303 skf.kf_type = nextfreetype; 304 skf.kf_fileop = kf[i].kf_fileop; 305 if ((fkf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) 306 fkf->kf_vop = kf[i].kf_vop; 307 } 308 309 return nextfreetype++; 310 } 311 312 int 313 kernfs_try_fileop(kfstype type, kfsfileop fileop, void *v, int error) 314 { 315 struct kernfs_fileop *kf, skf; 316 317 skf.kf_type = type; 318 skf.kf_fileop = fileop; 319 if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) 320 if (kf->kf_vop) 321 return kf->kf_vop(v); 322 return error; 323 } 324 325 int 326 kernfs_try_xread(kfstype type, const struct kernfs_node *kfs, char **bfp, 327 size_t len, int error) 328 { 329 struct kernfs_fileop *kf, skf; 330 331 skf.kf_type = type; 332 skf.kf_fileop = KERNFS_XREAD; 333 if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) 334 if (kf->kf_xread) 335 return kf->kf_xread(kfs, bfp, len); 336 return error; 337 } 338 339 int 340 kernfs_try_xwrite(kfstype type, const struct kernfs_node *kfs, char *bf, 341 size_t len, int error) 342 { 343 struct kernfs_fileop *kf, skf; 344 345 skf.kf_type = type; 346 skf.kf_fileop = KERNFS_XWRITE; 347 if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) 348 if (kf->kf_xwrite) 349 return kf->kf_xwrite(kfs, bf, len); 350 return error; 351 } 352 353 int 354 kernfs_addentry(kernfs_parentdir_t *pkt, kernfs_entry_t *dkt) 355 { 356 struct kernfs_subdir *ks, *parent; 357 358 if (pkt == NULL) { 359 SIMPLEQ_INSERT_TAIL(&dyn_kern_targets, dkt, dkt_queue); 360 nkern_targets++; 361 if (dkt->dkt_kt.kt_vtype == VDIR) 362 nkern_dirs++; 363 } else { 364 parent = (struct kernfs_subdir *)pkt->kt_data; 365 SIMPLEQ_INSERT_TAIL(&parent->ks_entries, dkt, dkt_queue); 366 parent->ks_nentries++; 367 if (dkt->dkt_kt.kt_vtype == VDIR) 368 parent->ks_dirs++; 369 } 370 if (dkt->dkt_kt.kt_vtype == VDIR && dkt->dkt_kt.kt_data == NULL) { 371 ks = malloc(sizeof(struct kernfs_subdir), 372 M_TEMP, M_WAITOK); 373 SIMPLEQ_INIT(&ks->ks_entries); 374 ks->ks_nentries = 2; /* . and .. */ 375 ks->ks_dirs = 2; 376 ks->ks_parent = pkt ? pkt : &kern_targets[0]; 377 dkt->dkt_kt.kt_data = ks; 378 } 379 return 0; 380 } 381 382 static int 383 kernfs_xread(kfs, off, bufp, len, wrlen) 384 struct kernfs_node *kfs; 385 int off; 386 char **bufp; 387 size_t len; 388 size_t *wrlen; 389 { 390 const struct kern_target *kt; 391 #ifdef IPSEC 392 struct mbuf *m; 393 #endif 394 int err; 395 396 kt = kfs->kfs_kt; 397 398 switch (kfs->kfs_type) { 399 case KFStime: { 400 struct timeval tv; 401 402 microtime(&tv); 403 snprintf(*bufp, len, "%ld %ld\n", tv.tv_sec, tv.tv_usec); 404 break; 405 } 406 407 case KFSint: { 408 int *ip = kt->kt_data; 409 410 snprintf(*bufp, len, "%d\n", *ip); 411 break; 412 } 413 414 case KFSstring: { 415 char *cp = kt->kt_data; 416 417 *bufp = cp; 418 break; 419 } 420 421 case KFSmsgbuf: { 422 long n; 423 424 /* 425 * deal with cases where the message buffer has 426 * become corrupted. 427 */ 428 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 429 msgbufenabled = 0; 430 return (ENXIO); 431 } 432 433 /* 434 * Note that reads of /kern/msgbuf won't necessarily yield 435 * consistent results, if the message buffer is modified 436 * while the read is in progress. The worst that can happen 437 * is that incorrect data will be read. There's no way 438 * that this can crash the system unless the values in the 439 * message buffer header are corrupted, but that'll cause 440 * the system to die anyway. 441 */ 442 if (off >= msgbufp->msg_bufs) { 443 *wrlen = 0; 444 return (0); 445 } 446 n = msgbufp->msg_bufx + off; 447 if (n >= msgbufp->msg_bufs) 448 n -= msgbufp->msg_bufs; 449 len = min(msgbufp->msg_bufs - n, msgbufp->msg_bufs - off); 450 *bufp = msgbufp->msg_bufc + n; 451 *wrlen = len; 452 return (0); 453 } 454 455 case KFShostname: { 456 char *cp = hostname; 457 int xlen = hostnamelen; 458 459 if (xlen >= (len - 2)) 460 return (EINVAL); 461 462 memcpy(*bufp, cp, xlen); 463 (*bufp)[xlen] = '\n'; 464 (*bufp)[xlen+1] = '\0'; 465 len = strlen(*bufp); 466 break; 467 } 468 469 case KFSavenrun: 470 averunnable.fscale = FSCALE; 471 snprintf(*bufp, len, "%d %d %d %ld\n", 472 averunnable.ldavg[0], averunnable.ldavg[1], 473 averunnable.ldavg[2], averunnable.fscale); 474 break; 475 476 #ifdef IPSEC 477 case KFSipsecsa: 478 /* 479 * Note that SA configuration could be changed during the 480 * read operation, resulting in garbled output. 481 */ 482 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 483 if (!m) 484 return (ENOBUFS); 485 if (off >= m->m_pkthdr.len) { 486 *wrlen = 0; 487 m_freem(m); 488 return (0); 489 } 490 if (len > m->m_pkthdr.len - off) 491 len = m->m_pkthdr.len - off; 492 m_copydata(m, off, len, *bufp); 493 *wrlen = len; 494 m_freem(m); 495 return (0); 496 497 case KFSipsecsp: 498 /* 499 * Note that SP configuration could be changed during the 500 * read operation, resulting in garbled output. 501 */ 502 if (!kfs->kfs_v) { 503 struct secpolicy *sp; 504 505 sp = key_getspbyid(kfs->kfs_value); 506 if (sp) 507 kfs->kfs_v = sp; 508 else 509 return (ENOENT); 510 } 511 m = key_setdumpsp((struct secpolicy *)kfs->kfs_v, 512 SADB_X_SPDGET, 0, 0); 513 if (!m) 514 return (ENOBUFS); 515 if (off >= m->m_pkthdr.len) { 516 *wrlen = 0; 517 m_freem(m); 518 return (0); 519 } 520 if (len > m->m_pkthdr.len - off) 521 len = m->m_pkthdr.len - off; 522 m_copydata(m, off, len, *bufp); 523 *wrlen = len; 524 m_freem(m); 525 return (0); 526 #endif 527 528 default: 529 err = kernfs_try_xread(kfs->kfs_type, kfs, bufp, len, 530 EOPNOTSUPP); 531 if (err) 532 return err; 533 } 534 535 len = strlen(*bufp); 536 if (len <= off) 537 *wrlen = 0; 538 else { 539 *bufp += off; 540 *wrlen = len - off; 541 } 542 return (0); 543 } 544 545 static int 546 kernfs_xwrite(kfs, bf, len) 547 const struct kernfs_node *kfs; 548 char *bf; 549 size_t len; 550 { 551 552 switch (kfs->kfs_type) { 553 case KFShostname: 554 if (bf[len-1] == '\n') 555 --len; 556 memcpy(hostname, bf, len); 557 hostname[len] = '\0'; 558 hostnamelen = (size_t) len; 559 return (0); 560 561 default: 562 return kernfs_try_xwrite(kfs->kfs_type, kfs, bf, len, EIO); 563 } 564 } 565 566 567 /* 568 * vp is the current namei directory 569 * ndp is the name to locate in that directory... 570 */ 571 int 572 kernfs_lookup(v) 573 void *v; 574 { 575 struct vop_lookup_args /* { 576 struct vnode * a_dvp; 577 struct vnode ** a_vpp; 578 struct componentname * a_cnp; 579 } */ *ap = v; 580 struct componentname *cnp = ap->a_cnp; 581 struct vnode **vpp = ap->a_vpp; 582 struct vnode *dvp = ap->a_dvp; 583 const char *pname = cnp->cn_nameptr; 584 const struct kernfs_node *kfs; 585 const struct kern_target *kt; 586 const struct dyn_kern_target *dkt; 587 const struct kernfs_subdir *ks; 588 int error, i, wantpunlock; 589 #ifdef IPSEC 590 char *ep; 591 u_int32_t id; 592 #endif 593 594 *vpp = NULLVP; 595 cnp->cn_flags &= ~PDIRUNLOCK; 596 597 if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) 598 return (EROFS); 599 600 if (cnp->cn_namelen == 1 && *pname == '.') { 601 *vpp = dvp; 602 VREF(dvp); 603 return (0); 604 } 605 606 wantpunlock = (~cnp->cn_flags & (LOCKPARENT | ISLASTCN)); 607 kfs = VTOKERN(dvp); 608 switch (kfs->kfs_type) { 609 case KFSkern: 610 /* 611 * Shouldn't get here with .. in the root node. 612 */ 613 if (cnp->cn_flags & ISDOTDOT) 614 return (EIO); 615 616 for (i = 0; i < static_nkern_targets; i++) { 617 kt = &kern_targets[i]; 618 if (cnp->cn_namelen == kt->kt_namlen && 619 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 620 goto found; 621 } 622 SIMPLEQ_FOREACH(dkt, &dyn_kern_targets, dkt_queue) { 623 if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && 624 memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { 625 kt = &dkt->dkt_kt; 626 goto found; 627 } 628 } 629 break; 630 631 found: 632 error = kernfs_allocvp(dvp->v_mount, vpp, kt->kt_tag, kt, 0); 633 if ((error == 0) && wantpunlock) { 634 VOP_UNLOCK(dvp, 0); 635 cnp->cn_flags |= PDIRUNLOCK; 636 } 637 return (error); 638 639 case KFSsubdir: 640 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 641 if (cnp->cn_flags & ISDOTDOT) { 642 kt = ks->ks_parent; 643 goto found; 644 } 645 646 SIMPLEQ_FOREACH(dkt, &ks->ks_entries, dkt_queue) { 647 if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && 648 memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { 649 kt = &dkt->dkt_kt; 650 goto found; 651 } 652 } 653 break; 654 655 #ifdef IPSEC 656 case KFSipsecsadir: 657 if (cnp->cn_flags & ISDOTDOT) { 658 kt = &kern_targets[0]; 659 goto found; 660 } 661 662 for (i = 2; i < nipsecsa_targets; i++) { 663 kt = &ipsecsa_targets[i]; 664 if (cnp->cn_namelen == kt->kt_namlen && 665 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 666 goto found; 667 } 668 669 ep = NULL; 670 id = strtoul(pname, &ep, 10); 671 if (!ep || *ep || ep == pname) 672 break; 673 674 error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsa, &ipsecsa_kt, id); 675 if ((error == 0) && wantpunlock) { 676 VOP_UNLOCK(dvp, 0); 677 cnp->cn_flags |= PDIRUNLOCK; 678 } 679 return (error); 680 681 case KFSipsecspdir: 682 if (cnp->cn_flags & ISDOTDOT) { 683 kt = &kern_targets[0]; 684 goto found; 685 } 686 687 for (i = 2; i < nipsecsp_targets; i++) { 688 kt = &ipsecsp_targets[i]; 689 if (cnp->cn_namelen == kt->kt_namlen && 690 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 691 goto found; 692 } 693 694 ep = NULL; 695 id = strtoul(pname, &ep, 10); 696 if (!ep || *ep || ep == pname) 697 break; 698 699 error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsp, &ipsecsp_kt, id); 700 if ((error == 0) && wantpunlock) { 701 VOP_UNLOCK(dvp, 0); 702 cnp->cn_flags |= PDIRUNLOCK; 703 } 704 return (error); 705 #endif 706 707 default: 708 return (ENOTDIR); 709 } 710 711 return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); 712 } 713 714 int 715 kernfs_open(v) 716 void *v; 717 { 718 struct vop_open_args /* { 719 struct vnode *a_vp; 720 int a_mode; 721 kauth_cred_t a_cred; 722 struct lwp *a_l; 723 } */ *ap = v; 724 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 725 #ifdef IPSEC 726 struct mbuf *m; 727 struct secpolicy *sp; 728 #endif 729 730 switch (kfs->kfs_type) { 731 #ifdef IPSEC 732 case KFSipsecsa: 733 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 734 if (m) { 735 m_freem(m); 736 return (0); 737 } else 738 return (ENOENT); 739 740 case KFSipsecsp: 741 sp = key_getspbyid(kfs->kfs_value); 742 if (sp) { 743 kfs->kfs_v = sp; 744 return (0); 745 } else 746 return (ENOENT); 747 #endif 748 749 default: 750 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_OPEN, 751 v, 0); 752 } 753 } 754 755 int 756 kernfs_close(v) 757 void *v; 758 { 759 struct vop_close_args /* { 760 struct vnode *a_vp; 761 int a_fflag; 762 kauth_cred_t a_cred; 763 struct lwp *a_l; 764 } */ *ap = v; 765 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 766 767 switch (kfs->kfs_type) { 768 #ifdef IPSEC 769 case KFSipsecsp: 770 key_freesp((struct secpolicy *)kfs->kfs_v); 771 break; 772 #endif 773 774 default: 775 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_CLOSE, 776 v, 0); 777 } 778 779 return (0); 780 } 781 782 int 783 kernfs_access(v) 784 void *v; 785 { 786 struct vop_access_args /* { 787 struct vnode *a_vp; 788 int a_mode; 789 kauth_cred_t a_cred; 790 struct lwp *a_l; 791 } */ *ap = v; 792 struct vattr va; 793 int error; 794 795 if ((error = VOP_GETATTR(ap->a_vp, &va, ap->a_cred, ap->a_l)) != 0) 796 return (error); 797 798 return (vaccess(va.va_type, va.va_mode, va.va_uid, va.va_gid, 799 ap->a_mode, ap->a_cred)); 800 } 801 802 static int 803 kernfs_default_fileop_getattr(v) 804 void *v; 805 { 806 struct vop_getattr_args /* { 807 struct vnode *a_vp; 808 struct vattr *a_vap; 809 kauth_cred_t a_cred; 810 struct lwp *a_l; 811 } */ *ap = v; 812 struct vattr *vap = ap->a_vap; 813 814 vap->va_nlink = 1; 815 vap->va_bytes = vap->va_size = 0; 816 817 return 0; 818 } 819 820 int 821 kernfs_getattr(v) 822 void *v; 823 { 824 struct vop_getattr_args /* { 825 struct vnode *a_vp; 826 struct vattr *a_vap; 827 kauth_cred_t a_cred; 828 struct lwp *a_l; 829 } */ *ap = v; 830 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 831 struct kernfs_subdir *ks; 832 struct vattr *vap = ap->a_vap; 833 int error = 0; 834 char strbuf[KSTRING], *bf; 835 size_t nread, total; 836 837 VATTR_NULL(vap); 838 vap->va_type = ap->a_vp->v_type; 839 vap->va_uid = 0; 840 vap->va_gid = 0; 841 vap->va_mode = kfs->kfs_mode; 842 vap->va_fileid = kfs->kfs_fileno; 843 vap->va_flags = 0; 844 vap->va_size = 0; 845 vap->va_blocksize = DEV_BSIZE; 846 /* Make all times be current TOD, except for the "boottime" node. */ 847 if (kfs->kfs_kt && kfs->kfs_kt->kt_namlen == 8 && 848 !memcmp(kfs->kfs_kt->kt_name, "boottime", 8)) { 849 TIMEVAL_TO_TIMESPEC(&boottime, &vap->va_ctime); 850 } else { 851 getnanotime(&vap->va_ctime); 852 } 853 vap->va_atime = vap->va_mtime = vap->va_ctime; 854 vap->va_gen = 0; 855 vap->va_flags = 0; 856 vap->va_rdev = 0; 857 vap->va_bytes = 0; 858 859 switch (kfs->kfs_type) { 860 case KFSkern: 861 vap->va_nlink = nkern_dirs; 862 vap->va_bytes = vap->va_size = DEV_BSIZE; 863 break; 864 865 case KFSroot: 866 vap->va_nlink = 1; 867 vap->va_bytes = vap->va_size = DEV_BSIZE; 868 break; 869 870 case KFSsubdir: 871 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 872 vap->va_nlink = ks->ks_dirs; 873 vap->va_bytes = vap->va_size = DEV_BSIZE; 874 break; 875 876 case KFSnull: 877 case KFStime: 878 case KFSint: 879 case KFSstring: 880 case KFShostname: 881 case KFSavenrun: 882 case KFSdevice: 883 case KFSmsgbuf: 884 #ifdef IPSEC 885 case KFSipsecsa: 886 case KFSipsecsp: 887 #endif 888 vap->va_nlink = 1; 889 total = 0; 890 do { 891 bf = strbuf; 892 error = kernfs_xread(kfs, total, &bf, 893 sizeof(strbuf), &nread); 894 total += nread; 895 } while (error == 0 && nread != 0); 896 vap->va_bytes = vap->va_size = total; 897 break; 898 899 #ifdef IPSEC 900 case KFSipsecsadir: 901 case KFSipsecspdir: 902 vap->va_nlink = 2; 903 vap->va_bytes = vap->va_size = DEV_BSIZE; 904 break; 905 #endif 906 907 default: 908 error = kernfs_try_fileop(kfs->kfs_type, 909 KERNFS_FILEOP_GETATTR, v, EINVAL); 910 break; 911 } 912 913 return (error); 914 } 915 916 /*ARGSUSED*/ 917 int 918 kernfs_setattr(v) 919 void *v; 920 { 921 922 /* 923 * Silently ignore attribute changes. 924 * This allows for open with truncate to have no 925 * effect until some data is written. I want to 926 * do it this way because all writes are atomic. 927 */ 928 return (0); 929 } 930 931 int 932 kernfs_default_xread(v) 933 void *v; 934 { 935 struct vop_read_args /* { 936 struct vnode *a_vp; 937 struct uio *a_uio; 938 int a_ioflag; 939 kauth_cred_t a_cred; 940 } */ *ap = v; 941 struct uio *uio = ap->a_uio; 942 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 943 char strbuf[KSTRING], *bf; 944 int off; 945 size_t len; 946 int error; 947 948 if (ap->a_vp->v_type == VDIR) 949 return (EOPNOTSUPP); 950 951 off = (int)uio->uio_offset; 952 /* Don't allow negative offsets */ 953 if (off < 0) 954 return EINVAL; 955 956 bf = strbuf; 957 if ((error = kernfs_xread(kfs, off, &bf, sizeof(strbuf), &len)) == 0) 958 error = uiomove(bf, len, uio); 959 return (error); 960 } 961 962 int 963 kernfs_read(v) 964 void *v; 965 { 966 struct vop_read_args /* { 967 struct vnode *a_vp; 968 struct uio *a_uio; 969 int a_ioflag; 970 struct ucred *a_cred; 971 } */ *ap = v; 972 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 973 974 if (kfs->kfs_type < KFSlasttype) { 975 /* use default function */ 976 return kernfs_default_xread(v); 977 } 978 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_READ, v, 979 EOPNOTSUPP); 980 } 981 982 static int 983 kernfs_default_xwrite(v) 984 void *v; 985 { 986 struct vop_write_args /* { 987 struct vnode *a_vp; 988 struct uio *a_uio; 989 int a_ioflag; 990 kauth_cred_t a_cred; 991 } */ *ap = v; 992 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 993 struct uio *uio = ap->a_uio; 994 int error, xlen; 995 char strbuf[KSTRING]; 996 997 if (uio->uio_offset != 0) 998 return (EINVAL); 999 1000 xlen = min(uio->uio_resid, KSTRING-1); 1001 if ((error = uiomove(strbuf, xlen, uio)) != 0) 1002 return (error); 1003 1004 if (uio->uio_resid != 0) 1005 return (EIO); 1006 1007 strbuf[xlen] = '\0'; 1008 xlen = strlen(strbuf); 1009 return (kernfs_xwrite(kfs, strbuf, xlen)); 1010 } 1011 1012 int 1013 kernfs_write(v) 1014 void *v; 1015 { 1016 struct vop_write_args /* { 1017 struct vnode *a_vp; 1018 struct uio *a_uio; 1019 int a_ioflag; 1020 kauth_cred_t a_cred; 1021 } */ *ap = v; 1022 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1023 1024 if (kfs->kfs_type < KFSlasttype) { 1025 /* use default function */ 1026 return kernfs_default_xwrite(v); 1027 } 1028 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_WRITE, v, 1029 EOPNOTSUPP); 1030 } 1031 1032 int 1033 kernfs_ioctl(v) 1034 void *v; 1035 { 1036 struct vop_ioctl_args /* { 1037 const struct vnodeop_desc *a_desc; 1038 struct vnode *a_vp; 1039 u_long a_command; 1040 void *a_data; 1041 int a_fflag; 1042 kauth_cred_t a_cred; 1043 struct lwp *a_l; 1044 } */ *ap = v; 1045 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1046 1047 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_IOCTL, v, 1048 EPASSTHROUGH); 1049 } 1050 1051 static int 1052 kernfs_setdirentfileno_kt(struct dirent *d, const struct kern_target *kt, 1053 u_int32_t value, struct vop_readdir_args *ap) 1054 { 1055 struct kernfs_node *kfs; 1056 struct vnode *vp; 1057 int error; 1058 1059 if ((error = kernfs_allocvp(ap->a_vp->v_mount, &vp, kt->kt_tag, kt, 1060 value)) != 0) 1061 return error; 1062 if (kt->kt_tag == KFSdevice) { 1063 struct vattr va; 1064 1065 error = VOP_GETATTR(vp, &va, ap->a_cred, curlwp); 1066 if (error != 0) { 1067 return error; 1068 } 1069 d->d_fileno = va.va_fileid; 1070 } else { 1071 kfs = VTOKERN(vp); 1072 d->d_fileno = kfs->kfs_fileno; 1073 } 1074 vput(vp); 1075 return 0; 1076 } 1077 1078 static int 1079 kernfs_setdirentfileno(struct dirent *d, off_t entry, 1080 struct kernfs_node *thisdir_kfs, const struct kern_target *parent_kt, 1081 const struct kern_target *kt, struct vop_readdir_args *ap) 1082 { 1083 const struct kern_target *ikt; 1084 int error; 1085 1086 switch (entry) { 1087 case 0: 1088 d->d_fileno = thisdir_kfs->kfs_fileno; 1089 return 0; 1090 case 1: 1091 ikt = parent_kt; 1092 break; 1093 default: 1094 ikt = kt; 1095 break; 1096 } 1097 if (ikt != thisdir_kfs->kfs_kt) { 1098 if ((error = kernfs_setdirentfileno_kt(d, ikt, 0, ap)) != 0) 1099 return error; 1100 } else 1101 d->d_fileno = thisdir_kfs->kfs_fileno; 1102 return 0; 1103 } 1104 1105 int 1106 kernfs_readdir(v) 1107 void *v; 1108 { 1109 struct vop_readdir_args /* { 1110 struct vnode *a_vp; 1111 struct uio *a_uio; 1112 kauth_cred_t a_cred; 1113 int *a_eofflag; 1114 off_t **a_cookies; 1115 int a_*ncookies; 1116 } */ *ap = v; 1117 struct uio *uio = ap->a_uio; 1118 struct dirent d; 1119 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1120 const struct kern_target *kt; 1121 const struct dyn_kern_target *dkt = NULL; 1122 const struct kernfs_subdir *ks; 1123 off_t i, j; 1124 int error; 1125 off_t *cookies = NULL; 1126 int ncookies = 0, n; 1127 #ifdef IPSEC 1128 struct secasvar *sav, *sav2; 1129 struct secpolicy *sp; 1130 #endif 1131 1132 if (uio->uio_resid < UIO_MX) 1133 return (EINVAL); 1134 if (uio->uio_offset < 0) 1135 return (EINVAL); 1136 1137 error = 0; 1138 i = uio->uio_offset; 1139 memset(&d, 0, sizeof(d)); 1140 d.d_reclen = UIO_MX; 1141 ncookies = uio->uio_resid / UIO_MX; 1142 1143 switch (kfs->kfs_type) { 1144 case KFSkern: 1145 if (i >= nkern_targets) 1146 return (0); 1147 1148 if (ap->a_ncookies) { 1149 ncookies = min(ncookies, (nkern_targets - i)); 1150 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1151 M_WAITOK); 1152 *ap->a_cookies = cookies; 1153 } 1154 1155 n = 0; 1156 for (; i < nkern_targets && uio->uio_resid >= UIO_MX; i++) { 1157 if (i < static_nkern_targets) 1158 kt = &kern_targets[i]; 1159 else { 1160 if (dkt == NULL) { 1161 dkt = SIMPLEQ_FIRST(&dyn_kern_targets); 1162 for (j = static_nkern_targets; j < i && 1163 dkt != NULL; j++) 1164 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1165 if (j != i) 1166 break; 1167 } else { 1168 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1169 } 1170 if (dkt == NULL) 1171 break; 1172 kt = &dkt->dkt_kt; 1173 } 1174 if (kt->kt_tag == KFSdevice) { 1175 dev_t *dp = kt->kt_data; 1176 struct vnode *fvp; 1177 1178 if (*dp == NODEV || 1179 !vfinddev(*dp, kt->kt_vtype, &fvp)) 1180 continue; 1181 } 1182 d.d_namlen = kt->kt_namlen; 1183 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1184 &kern_targets[0], kt, ap)) != 0) 1185 break; 1186 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1187 d.d_type = kt->kt_type; 1188 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1189 break; 1190 if (cookies) 1191 *cookies++ = i + 1; 1192 n++; 1193 } 1194 ncookies = n; 1195 break; 1196 1197 case KFSroot: 1198 if (i >= 2) 1199 return 0; 1200 1201 if (ap->a_ncookies) { 1202 ncookies = min(ncookies, (2 - i)); 1203 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1204 M_WAITOK); 1205 *ap->a_cookies = cookies; 1206 } 1207 1208 n = 0; 1209 for (; i < 2 && uio->uio_resid >= UIO_MX; i++) { 1210 kt = &kern_targets[i]; 1211 d.d_namlen = kt->kt_namlen; 1212 d.d_fileno = KERNFS_FILENO(kt, kt->kt_tag, 0); 1213 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1214 d.d_type = kt->kt_type; 1215 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1216 break; 1217 if (cookies) 1218 *cookies++ = i + 1; 1219 n++; 1220 } 1221 ncookies = n; 1222 break; 1223 1224 case KFSsubdir: 1225 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 1226 if (i >= ks->ks_nentries) 1227 return (0); 1228 1229 if (ap->a_ncookies) { 1230 ncookies = min(ncookies, (ks->ks_nentries - i)); 1231 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1232 M_WAITOK); 1233 *ap->a_cookies = cookies; 1234 } 1235 1236 dkt = SIMPLEQ_FIRST(&ks->ks_entries); 1237 for (j = 0; j < i && dkt != NULL; j++) 1238 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1239 n = 0; 1240 for (; i < ks->ks_nentries && uio->uio_resid >= UIO_MX; i++) { 1241 if (i < 2) 1242 kt = &subdir_targets[i]; 1243 else { 1244 /* check if ks_nentries lied to us */ 1245 if (dkt == NULL) 1246 break; 1247 kt = &dkt->dkt_kt; 1248 dkt = SIMPLEQ_NEXT(dkt, dkt_queue); 1249 } 1250 if (kt->kt_tag == KFSdevice) { 1251 dev_t *dp = kt->kt_data; 1252 struct vnode *fvp; 1253 1254 if (*dp == NODEV || 1255 !vfinddev(*dp, kt->kt_vtype, &fvp)) 1256 continue; 1257 } 1258 d.d_namlen = kt->kt_namlen; 1259 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1260 ks->ks_parent, kt, ap)) != 0) 1261 break; 1262 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1263 d.d_type = kt->kt_type; 1264 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1265 break; 1266 if (cookies) 1267 *cookies++ = i + 1; 1268 n++; 1269 } 1270 ncookies = n; 1271 break; 1272 1273 #ifdef IPSEC 1274 case KFSipsecsadir: 1275 /* count SA in the system */ 1276 n = 0; 1277 TAILQ_FOREACH(sav, &satailq, tailq) { 1278 for (sav2 = TAILQ_FIRST(&satailq); 1279 sav2 != sav; 1280 sav2 = TAILQ_NEXT(sav2, tailq)) { 1281 if (sav->spi == sav2->spi) { 1282 /* multiple SA with same SPI */ 1283 break; 1284 } 1285 } 1286 if (sav == sav2 || sav->spi != sav2->spi) 1287 n++; 1288 } 1289 1290 if (i >= nipsecsa_targets + n) 1291 return (0); 1292 1293 if (ap->a_ncookies) { 1294 ncookies = min(ncookies, (n - i)); 1295 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1296 M_WAITOK); 1297 *ap->a_cookies = cookies; 1298 } 1299 1300 n = 0; 1301 for (; i < nipsecsa_targets && uio->uio_resid >= UIO_MX; i++) { 1302 kt = &ipsecsa_targets[i]; 1303 d.d_namlen = kt->kt_namlen; 1304 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1305 &kern_targets[0], kt, ap)) != 0) 1306 break; 1307 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1308 d.d_type = kt->kt_type; 1309 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1310 break; 1311 if (cookies) 1312 *cookies++ = i + 1; 1313 n++; 1314 } 1315 if (error) { 1316 ncookies = n; 1317 break; 1318 } 1319 1320 TAILQ_FOREACH(sav, &satailq, tailq) { 1321 for (sav2 = TAILQ_FIRST(&satailq); 1322 sav2 != sav; 1323 sav2 = TAILQ_NEXT(sav2, tailq)) { 1324 if (sav->spi == sav2->spi) { 1325 /* multiple SA with same SPI */ 1326 break; 1327 } 1328 } 1329 if (sav != sav2 && sav->spi == sav2->spi) 1330 continue; 1331 if (uio->uio_resid < UIO_MX) 1332 break; 1333 if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsa_kt, 1334 sav->spi, ap)) != 0) 1335 break; 1336 d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), 1337 "%u", ntohl(sav->spi)); 1338 d.d_type = DT_REG; 1339 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1340 break; 1341 if (cookies) 1342 *cookies++ = i + 1; 1343 n++; 1344 i++; 1345 } 1346 ncookies = n; 1347 break; 1348 1349 case KFSipsecspdir: 1350 /* count SP in the system */ 1351 n = 0; 1352 TAILQ_FOREACH(sp, &sptailq, tailq) 1353 n++; 1354 1355 if (i >= nipsecsp_targets + n) 1356 return (0); 1357 1358 if (ap->a_ncookies) { 1359 ncookies = min(ncookies, (n - i)); 1360 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1361 M_WAITOK); 1362 *ap->a_cookies = cookies; 1363 } 1364 1365 n = 0; 1366 for (; i < nipsecsp_targets && uio->uio_resid >= UIO_MX; i++) { 1367 kt = &ipsecsp_targets[i]; 1368 d.d_namlen = kt->kt_namlen; 1369 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1370 &kern_targets[0], kt, ap)) != 0) 1371 break; 1372 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1373 d.d_type = kt->kt_type; 1374 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1375 break; 1376 if (cookies) 1377 *cookies++ = i + 1; 1378 n++; 1379 } 1380 if (error) { 1381 ncookies = n; 1382 break; 1383 } 1384 1385 TAILQ_FOREACH(sp, &sptailq, tailq) { 1386 if (uio->uio_resid < UIO_MX) 1387 break; 1388 if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsp_kt, 1389 sp->id, ap)) != 0) 1390 break; 1391 d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), 1392 "%u", sp->id); 1393 d.d_type = DT_REG; 1394 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1395 break; 1396 if (cookies) 1397 *cookies++ = i + 1; 1398 n++; 1399 i++; 1400 } 1401 ncookies = n; 1402 break; 1403 #endif 1404 1405 default: 1406 error = ENOTDIR; 1407 break; 1408 } 1409 1410 if (ap->a_ncookies) { 1411 if (error) { 1412 if (cookies) 1413 free(*ap->a_cookies, M_TEMP); 1414 *ap->a_ncookies = 0; 1415 *ap->a_cookies = NULL; 1416 } else 1417 *ap->a_ncookies = ncookies; 1418 } 1419 1420 uio->uio_offset = i; 1421 return (error); 1422 } 1423 1424 int 1425 kernfs_inactive(v) 1426 void *v; 1427 { 1428 struct vop_inactive_args /* { 1429 struct vnode *a_vp; 1430 struct lwp *a_l; 1431 } */ *ap = v; 1432 struct vnode *vp = ap->a_vp; 1433 const struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1434 #ifdef IPSEC 1435 struct mbuf *m; 1436 struct secpolicy *sp; 1437 #endif 1438 1439 VOP_UNLOCK(vp, 0); 1440 switch (kfs->kfs_type) { 1441 #ifdef IPSEC 1442 case KFSipsecsa: 1443 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 1444 if (m) 1445 m_freem(m); 1446 else 1447 vgone(vp); 1448 break; 1449 case KFSipsecsp: 1450 sp = key_getspbyid(kfs->kfs_value); 1451 if (sp) 1452 key_freesp(sp); 1453 else { 1454 /* should never happen as we hold a refcnt */ 1455 vgone(vp); 1456 } 1457 break; 1458 #endif 1459 default: 1460 break; 1461 } 1462 return (0); 1463 } 1464 1465 int 1466 kernfs_reclaim(v) 1467 void *v; 1468 { 1469 struct vop_reclaim_args /* { 1470 struct vnode *a_vp; 1471 } */ *ap = v; 1472 1473 return (kernfs_freevp(ap->a_vp)); 1474 } 1475 1476 /* 1477 * Return POSIX pathconf information applicable to special devices. 1478 */ 1479 int 1480 kernfs_pathconf(v) 1481 void *v; 1482 { 1483 struct vop_pathconf_args /* { 1484 struct vnode *a_vp; 1485 int a_name; 1486 register_t *a_retval; 1487 } */ *ap = v; 1488 1489 switch (ap->a_name) { 1490 case _PC_LINK_MAX: 1491 *ap->a_retval = LINK_MAX; 1492 return (0); 1493 case _PC_MAX_CANON: 1494 *ap->a_retval = MAX_CANON; 1495 return (0); 1496 case _PC_MAX_INPUT: 1497 *ap->a_retval = MAX_INPUT; 1498 return (0); 1499 case _PC_PIPE_BUF: 1500 *ap->a_retval = PIPE_BUF; 1501 return (0); 1502 case _PC_CHOWN_RESTRICTED: 1503 *ap->a_retval = 1; 1504 return (0); 1505 case _PC_VDISABLE: 1506 *ap->a_retval = _POSIX_VDISABLE; 1507 return (0); 1508 case _PC_SYNC_IO: 1509 *ap->a_retval = 1; 1510 return (0); 1511 default: 1512 return (EINVAL); 1513 } 1514 /* NOTREACHED */ 1515 } 1516 1517 /* 1518 * Print out the contents of a /dev/fd vnode. 1519 */ 1520 /* ARGSUSED */ 1521 int 1522 kernfs_print(v) 1523 void *v; 1524 { 1525 1526 printf("tag VT_KERNFS, kernfs vnode\n"); 1527 return (0); 1528 } 1529 1530 int 1531 kernfs_link(v) 1532 void *v; 1533 { 1534 struct vop_link_args /* { 1535 struct vnode *a_dvp; 1536 struct vnode *a_vp; 1537 struct componentname *a_cnp; 1538 } */ *ap = v; 1539 1540 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1541 vput(ap->a_dvp); 1542 return (EROFS); 1543 } 1544 1545 int 1546 kernfs_symlink(v) 1547 void *v; 1548 { 1549 struct vop_symlink_args /* { 1550 struct vnode *a_dvp; 1551 struct vnode **a_vpp; 1552 struct componentname *a_cnp; 1553 struct vattr *a_vap; 1554 char *a_target; 1555 } */ *ap = v; 1556 1557 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1558 vput(ap->a_dvp); 1559 return (EROFS); 1560 } 1561