1 /* $NetBSD: kernfs_vnops.c,v 1.136 2009/03/14 15:36:22 dsl 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 1.136 2009/03/14 15:36:22 dsl 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(struct kernfs_node *kfs, int off, char **bufp, size_t len, size_t *wrlen) 384 { 385 const struct kern_target *kt; 386 #ifdef IPSEC 387 struct mbuf *m; 388 #endif 389 int err; 390 391 kt = kfs->kfs_kt; 392 393 switch (kfs->kfs_type) { 394 case KFStime: { 395 struct timeval tv; 396 397 microtime(&tv); 398 snprintf(*bufp, len, "%lld %ld\n", (long long)tv.tv_sec, 399 (long)tv.tv_usec); 400 break; 401 } 402 403 case KFSint: { 404 int *ip = kt->kt_data; 405 406 snprintf(*bufp, len, "%d\n", *ip); 407 break; 408 } 409 410 case KFSstring: { 411 char *cp = kt->kt_data; 412 413 *bufp = cp; 414 break; 415 } 416 417 case KFSmsgbuf: { 418 long n; 419 420 /* 421 * deal with cases where the message buffer has 422 * become corrupted. 423 */ 424 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 425 msgbufenabled = 0; 426 return (ENXIO); 427 } 428 429 /* 430 * Note that reads of /kern/msgbuf won't necessarily yield 431 * consistent results, if the message buffer is modified 432 * while the read is in progress. The worst that can happen 433 * is that incorrect data will be read. There's no way 434 * that this can crash the system unless the values in the 435 * message buffer header are corrupted, but that'll cause 436 * the system to die anyway. 437 */ 438 if (off >= msgbufp->msg_bufs) { 439 *wrlen = 0; 440 return (0); 441 } 442 n = msgbufp->msg_bufx + off; 443 if (n >= msgbufp->msg_bufs) 444 n -= msgbufp->msg_bufs; 445 len = min(msgbufp->msg_bufs - n, msgbufp->msg_bufs - off); 446 *bufp = msgbufp->msg_bufc + n; 447 *wrlen = len; 448 return (0); 449 } 450 451 case KFShostname: { 452 char *cp = hostname; 453 size_t xlen = hostnamelen; 454 455 if (xlen >= (len - 2)) 456 return (EINVAL); 457 458 memcpy(*bufp, cp, xlen); 459 (*bufp)[xlen] = '\n'; 460 (*bufp)[xlen+1] = '\0'; 461 len = strlen(*bufp); 462 break; 463 } 464 465 case KFSavenrun: 466 averunnable.fscale = FSCALE; 467 snprintf(*bufp, len, "%d %d %d %ld\n", 468 averunnable.ldavg[0], averunnable.ldavg[1], 469 averunnable.ldavg[2], averunnable.fscale); 470 break; 471 472 #ifdef IPSEC 473 case KFSipsecsa: 474 if (key_setdumpsa_spi == NULL) 475 return 0; 476 /* 477 * Note that SA configuration could be changed during the 478 * read operation, resulting in garbled output. 479 */ 480 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 481 if (!m) 482 return (ENOBUFS); 483 if (off >= m->m_pkthdr.len) { 484 *wrlen = 0; 485 m_freem(m); 486 return (0); 487 } 488 if (len > m->m_pkthdr.len - off) 489 len = m->m_pkthdr.len - off; 490 m_copydata(m, off, len, *bufp); 491 *wrlen = len; 492 m_freem(m); 493 return (0); 494 495 case KFSipsecsp: 496 /* 497 * Note that SP configuration could be changed during the 498 * read operation, resulting in garbled output. 499 */ 500 if (key_getspbyid == NULL) 501 return 0; 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(const struct kernfs_node *kfs, char *bf, size_t len) 547 { 548 549 switch (kfs->kfs_type) { 550 case KFShostname: 551 if (bf[len-1] == '\n') 552 --len; 553 memcpy(hostname, bf, len); 554 hostname[len] = '\0'; 555 hostnamelen = (size_t) len; 556 return (0); 557 558 default: 559 return kernfs_try_xwrite(kfs->kfs_type, kfs, bf, len, EIO); 560 } 561 } 562 563 564 /* 565 * vp is the current namei directory 566 * ndp is the name to locate in that directory... 567 */ 568 int 569 kernfs_lookup(void *v) 570 { 571 struct vop_lookup_args /* { 572 struct vnode * a_dvp; 573 struct vnode ** a_vpp; 574 struct componentname * a_cnp; 575 } */ *ap = v; 576 struct componentname *cnp = ap->a_cnp; 577 struct vnode **vpp = ap->a_vpp; 578 struct vnode *dvp = ap->a_dvp; 579 const char *pname = cnp->cn_nameptr; 580 const struct kernfs_node *kfs; 581 const struct kern_target *kt; 582 const struct dyn_kern_target *dkt; 583 const struct kernfs_subdir *ks; 584 int error, i; 585 #ifdef IPSEC 586 char *ep; 587 u_int32_t id; 588 #endif 589 590 *vpp = NULLVP; 591 592 if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) 593 return (EROFS); 594 595 if (cnp->cn_namelen == 1 && *pname == '.') { 596 *vpp = dvp; 597 VREF(dvp); 598 return (0); 599 } 600 601 kfs = VTOKERN(dvp); 602 switch (kfs->kfs_type) { 603 case KFSkern: 604 /* 605 * Shouldn't get here with .. in the root node. 606 */ 607 if (cnp->cn_flags & ISDOTDOT) 608 return (EIO); 609 610 for (i = 0; i < static_nkern_targets; i++) { 611 kt = &kern_targets[i]; 612 if (cnp->cn_namelen == kt->kt_namlen && 613 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 614 goto found; 615 } 616 SIMPLEQ_FOREACH(dkt, &dyn_kern_targets, dkt_queue) { 617 if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && 618 memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { 619 kt = &dkt->dkt_kt; 620 goto found; 621 } 622 } 623 break; 624 625 found: 626 error = kernfs_allocvp(dvp->v_mount, vpp, kt->kt_tag, kt, 0); 627 return (error); 628 629 case KFSsubdir: 630 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 631 if (cnp->cn_flags & ISDOTDOT) { 632 kt = ks->ks_parent; 633 goto found; 634 } 635 636 SIMPLEQ_FOREACH(dkt, &ks->ks_entries, dkt_queue) { 637 if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && 638 memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { 639 kt = &dkt->dkt_kt; 640 goto found; 641 } 642 } 643 break; 644 645 #ifdef IPSEC 646 case KFSipsecsadir: 647 if (cnp->cn_flags & ISDOTDOT) { 648 kt = &kern_targets[0]; 649 goto found; 650 } 651 652 for (i = 2; i < nipsecsa_targets; i++) { 653 kt = &ipsecsa_targets[i]; 654 if (cnp->cn_namelen == kt->kt_namlen && 655 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 656 goto found; 657 } 658 659 ep = NULL; 660 id = strtoul(pname, &ep, 10); 661 if (!ep || *ep || ep == pname) 662 break; 663 664 error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsa, &ipsecsa_kt, id); 665 return (error); 666 667 case KFSipsecspdir: 668 if (cnp->cn_flags & ISDOTDOT) { 669 kt = &kern_targets[0]; 670 goto found; 671 } 672 673 for (i = 2; i < nipsecsp_targets; i++) { 674 kt = &ipsecsp_targets[i]; 675 if (cnp->cn_namelen == kt->kt_namlen && 676 memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 677 goto found; 678 } 679 680 ep = NULL; 681 id = strtoul(pname, &ep, 10); 682 if (!ep || *ep || ep == pname) 683 break; 684 685 error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsp, &ipsecsp_kt, id); 686 return (error); 687 #endif 688 689 default: 690 return (ENOTDIR); 691 } 692 693 return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); 694 } 695 696 int 697 kernfs_open(void *v) 698 { 699 struct vop_open_args /* { 700 struct vnode *a_vp; 701 int a_mode; 702 kauth_cred_t a_cred; 703 } */ *ap = v; 704 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 705 #ifdef IPSEC 706 struct mbuf *m; 707 struct secpolicy *sp; 708 #endif 709 710 switch (kfs->kfs_type) { 711 #ifdef IPSEC 712 case KFSipsecsa: 713 if (key_setdumpsa_spi == NULL) 714 return 0; 715 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 716 if (m) { 717 m_freem(m); 718 return (0); 719 } else 720 return (ENOENT); 721 722 case KFSipsecsp: 723 if (key_getspbyid == NULL) 724 return 0; 725 sp = key_getspbyid(kfs->kfs_value); 726 if (sp) { 727 kfs->kfs_v = sp; 728 return (0); 729 } else 730 return (ENOENT); 731 #endif 732 733 default: 734 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_OPEN, 735 v, 0); 736 } 737 } 738 739 int 740 kernfs_close(void *v) 741 { 742 struct vop_close_args /* { 743 struct vnode *a_vp; 744 int a_fflag; 745 kauth_cred_t a_cred; 746 } */ *ap = v; 747 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 748 749 switch (kfs->kfs_type) { 750 #ifdef IPSEC 751 case KFSipsecsp: 752 if (key_freesp == NULL) 753 return 0; 754 key_freesp((struct secpolicy *)kfs->kfs_v); 755 break; 756 #endif 757 758 default: 759 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_CLOSE, 760 v, 0); 761 } 762 763 return (0); 764 } 765 766 int 767 kernfs_access(void *v) 768 { 769 struct vop_access_args /* { 770 struct vnode *a_vp; 771 int a_mode; 772 kauth_cred_t a_cred; 773 } */ *ap = v; 774 struct vattr va; 775 int error; 776 777 if ((error = VOP_GETATTR(ap->a_vp, &va, ap->a_cred)) != 0) 778 return (error); 779 780 return (vaccess(va.va_type, va.va_mode, va.va_uid, va.va_gid, 781 ap->a_mode, ap->a_cred)); 782 } 783 784 static int 785 kernfs_default_fileop_getattr(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 } */ *ap = v; 792 struct vattr *vap = ap->a_vap; 793 794 vap->va_nlink = 1; 795 vap->va_bytes = vap->va_size = 0; 796 797 return 0; 798 } 799 800 int 801 kernfs_getattr(void *v) 802 { 803 struct vop_getattr_args /* { 804 struct vnode *a_vp; 805 struct vattr *a_vap; 806 kauth_cred_t a_cred; 807 } */ *ap = v; 808 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 809 struct kernfs_subdir *ks; 810 struct vattr *vap = ap->a_vap; 811 int error = 0; 812 char strbuf[KSTRING], *bf; 813 size_t nread, total; 814 815 VATTR_NULL(vap); 816 vap->va_type = ap->a_vp->v_type; 817 vap->va_uid = 0; 818 vap->va_gid = 0; 819 vap->va_mode = kfs->kfs_mode; 820 vap->va_fileid = kfs->kfs_fileno; 821 vap->va_flags = 0; 822 vap->va_size = 0; 823 vap->va_blocksize = DEV_BSIZE; 824 /* Make all times be current TOD, except for the "boottime" node. */ 825 if (kfs->kfs_kt->kt_namlen == 8 && 826 !memcmp(kfs->kfs_kt->kt_name, "boottime", 8)) { 827 vap->va_ctime = boottime; 828 } else { 829 getnanotime(&vap->va_ctime); 830 } 831 vap->va_atime = vap->va_mtime = vap->va_ctime; 832 vap->va_gen = 0; 833 vap->va_flags = 0; 834 vap->va_rdev = 0; 835 vap->va_bytes = 0; 836 837 switch (kfs->kfs_type) { 838 case KFSkern: 839 vap->va_nlink = nkern_dirs; 840 vap->va_bytes = vap->va_size = DEV_BSIZE; 841 break; 842 843 case KFSroot: 844 vap->va_nlink = 1; 845 vap->va_bytes = vap->va_size = DEV_BSIZE; 846 break; 847 848 case KFSsubdir: 849 ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; 850 vap->va_nlink = ks->ks_dirs; 851 vap->va_bytes = vap->va_size = DEV_BSIZE; 852 break; 853 854 case KFSnull: 855 case KFStime: 856 case KFSint: 857 case KFSstring: 858 case KFShostname: 859 case KFSavenrun: 860 case KFSdevice: 861 case KFSmsgbuf: 862 #ifdef IPSEC 863 case KFSipsecsa: 864 case KFSipsecsp: 865 #endif 866 vap->va_nlink = 1; 867 total = 0; 868 do { 869 bf = strbuf; 870 error = kernfs_xread(kfs, total, &bf, 871 sizeof(strbuf), &nread); 872 total += nread; 873 } while (error == 0 && nread != 0); 874 vap->va_bytes = vap->va_size = total; 875 break; 876 877 #ifdef IPSEC 878 case KFSipsecsadir: 879 case KFSipsecspdir: 880 vap->va_nlink = 2; 881 vap->va_bytes = vap->va_size = DEV_BSIZE; 882 break; 883 #endif 884 885 default: 886 error = kernfs_try_fileop(kfs->kfs_type, 887 KERNFS_FILEOP_GETATTR, v, EINVAL); 888 break; 889 } 890 891 return (error); 892 } 893 894 /*ARGSUSED*/ 895 int 896 kernfs_setattr(void *v) 897 { 898 899 /* 900 * Silently ignore attribute changes. 901 * This allows for open with truncate to have no 902 * effect until some data is written. I want to 903 * do it this way because all writes are atomic. 904 */ 905 return (0); 906 } 907 908 int 909 kernfs_default_xread(void *v) 910 { 911 struct vop_read_args /* { 912 struct vnode *a_vp; 913 struct uio *a_uio; 914 int a_ioflag; 915 kauth_cred_t a_cred; 916 } */ *ap = v; 917 struct uio *uio = ap->a_uio; 918 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 919 char strbuf[KSTRING], *bf; 920 int off; 921 size_t len; 922 int error; 923 924 if (ap->a_vp->v_type == VDIR) 925 return (EOPNOTSUPP); 926 927 off = (int)uio->uio_offset; 928 /* Don't allow negative offsets */ 929 if (off < 0) 930 return EINVAL; 931 932 bf = strbuf; 933 if ((error = kernfs_xread(kfs, off, &bf, sizeof(strbuf), &len)) == 0) 934 error = uiomove(bf, len, uio); 935 return (error); 936 } 937 938 int 939 kernfs_read(void *v) 940 { 941 struct vop_read_args /* { 942 struct vnode *a_vp; 943 struct uio *a_uio; 944 int a_ioflag; 945 struct ucred *a_cred; 946 } */ *ap = v; 947 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 948 949 if (kfs->kfs_type < KFSlasttype) { 950 /* use default function */ 951 return kernfs_default_xread(v); 952 } 953 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_READ, v, 954 EOPNOTSUPP); 955 } 956 957 static int 958 kernfs_default_xwrite(void *v) 959 { 960 struct vop_write_args /* { 961 struct vnode *a_vp; 962 struct uio *a_uio; 963 int a_ioflag; 964 kauth_cred_t a_cred; 965 } */ *ap = v; 966 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 967 struct uio *uio = ap->a_uio; 968 int error; 969 size_t xlen; 970 char strbuf[KSTRING]; 971 972 if (uio->uio_offset != 0) 973 return (EINVAL); 974 975 xlen = min(uio->uio_resid, KSTRING-1); 976 if ((error = uiomove(strbuf, xlen, uio)) != 0) 977 return (error); 978 979 if (uio->uio_resid != 0) 980 return (EIO); 981 982 strbuf[xlen] = '\0'; 983 xlen = strlen(strbuf); 984 return (kernfs_xwrite(kfs, strbuf, xlen)); 985 } 986 987 int 988 kernfs_write(void *v) 989 { 990 struct vop_write_args /* { 991 struct vnode *a_vp; 992 struct uio *a_uio; 993 int a_ioflag; 994 kauth_cred_t a_cred; 995 } */ *ap = v; 996 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 997 998 if (kfs->kfs_type < KFSlasttype) { 999 /* use default function */ 1000 return kernfs_default_xwrite(v); 1001 } 1002 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_WRITE, v, 1003 EOPNOTSUPP); 1004 } 1005 1006 int 1007 kernfs_ioctl(void *v) 1008 { 1009 struct vop_ioctl_args /* { 1010 const struct vnodeop_desc *a_desc; 1011 struct vnode *a_vp; 1012 u_long a_command; 1013 void *a_data; 1014 int a_fflag; 1015 kauth_cred_t a_cred; 1016 } */ *ap = v; 1017 struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1018 1019 return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_IOCTL, v, 1020 EPASSTHROUGH); 1021 } 1022 1023 static int 1024 kernfs_setdirentfileno_kt(struct dirent *d, const struct kern_target *kt, 1025 u_int32_t value, struct vop_readdir_args *ap) 1026 { 1027 struct kernfs_node *kfs; 1028 struct vnode *vp; 1029 int error; 1030 1031 if ((error = kernfs_allocvp(ap->a_vp->v_mount, &vp, kt->kt_tag, kt, 1032 value)) != 0) 1033 return error; 1034 if (kt->kt_tag == KFSdevice) { 1035 struct vattr va; 1036 1037 error = VOP_GETATTR(vp, &va, ap->a_cred); 1038 if (error != 0) { 1039 return error; 1040 } 1041 d->d_fileno = va.va_fileid; 1042 } else { 1043 kfs = VTOKERN(vp); 1044 d->d_fileno = kfs->kfs_fileno; 1045 } 1046 vput(vp); 1047 return 0; 1048 } 1049 1050 static int 1051 kernfs_setdirentfileno(struct dirent *d, off_t entry, 1052 struct kernfs_node *thisdir_kfs, const struct kern_target *parent_kt, 1053 const struct kern_target *kt, struct vop_readdir_args *ap) 1054 { 1055 const struct kern_target *ikt; 1056 int error; 1057 1058 switch (entry) { 1059 case 0: 1060 d->d_fileno = thisdir_kfs->kfs_fileno; 1061 return 0; 1062 case 1: 1063 ikt = parent_kt; 1064 break; 1065 default: 1066 ikt = kt; 1067 break; 1068 } 1069 if (ikt != thisdir_kfs->kfs_kt) { 1070 if ((error = kernfs_setdirentfileno_kt(d, ikt, 0, ap)) != 0) 1071 return error; 1072 } else 1073 d->d_fileno = thisdir_kfs->kfs_fileno; 1074 return 0; 1075 } 1076 1077 int 1078 kernfs_readdir(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 if (&satailq == NULL) 1249 return 0; 1250 TAILQ_FOREACH(sav, &satailq, tailq) { 1251 for (sav2 = TAILQ_FIRST(&satailq); 1252 sav2 != sav; 1253 sav2 = TAILQ_NEXT(sav2, tailq)) { 1254 if (sav->spi == sav2->spi) { 1255 /* multiple SA with same SPI */ 1256 break; 1257 } 1258 } 1259 if (sav == sav2 || sav->spi != sav2->spi) 1260 n++; 1261 } 1262 1263 if (i >= nipsecsa_targets + n) 1264 return (0); 1265 1266 if (ap->a_ncookies) { 1267 ncookies = min(ncookies, (n - i)); 1268 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1269 M_WAITOK); 1270 *ap->a_cookies = cookies; 1271 } 1272 1273 n = 0; 1274 for (; i < nipsecsa_targets && uio->uio_resid >= UIO_MX; i++) { 1275 kt = &ipsecsa_targets[i]; 1276 d.d_namlen = kt->kt_namlen; 1277 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1278 &kern_targets[0], kt, ap)) != 0) 1279 break; 1280 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1281 d.d_type = kt->kt_type; 1282 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1283 break; 1284 if (cookies) 1285 *cookies++ = i + 1; 1286 n++; 1287 } 1288 if (error) { 1289 ncookies = n; 1290 break; 1291 } 1292 1293 TAILQ_FOREACH(sav, &satailq, tailq) { 1294 for (sav2 = TAILQ_FIRST(&satailq); 1295 sav2 != sav; 1296 sav2 = TAILQ_NEXT(sav2, tailq)) { 1297 if (sav->spi == sav2->spi) { 1298 /* multiple SA with same SPI */ 1299 break; 1300 } 1301 } 1302 if (sav != sav2 && sav->spi == sav2->spi) 1303 continue; 1304 if (uio->uio_resid < UIO_MX) 1305 break; 1306 if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsa_kt, 1307 sav->spi, ap)) != 0) 1308 break; 1309 d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), 1310 "%u", ntohl(sav->spi)); 1311 d.d_type = DT_REG; 1312 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1313 break; 1314 if (cookies) 1315 *cookies++ = i + 1; 1316 n++; 1317 i++; 1318 } 1319 ncookies = n; 1320 break; 1321 1322 case KFSipsecspdir: 1323 /* count SP in the system */ 1324 if (&sptailq == NULL) 1325 return 0; 1326 1327 n = 0; 1328 TAILQ_FOREACH(sp, &sptailq, tailq) 1329 n++; 1330 1331 if (i >= nipsecsp_targets + n) 1332 return (0); 1333 1334 if (ap->a_ncookies) { 1335 ncookies = min(ncookies, (n - i)); 1336 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, 1337 M_WAITOK); 1338 *ap->a_cookies = cookies; 1339 } 1340 1341 n = 0; 1342 for (; i < nipsecsp_targets && uio->uio_resid >= UIO_MX; i++) { 1343 kt = &ipsecsp_targets[i]; 1344 d.d_namlen = kt->kt_namlen; 1345 if ((error = kernfs_setdirentfileno(&d, i, kfs, 1346 &kern_targets[0], kt, ap)) != 0) 1347 break; 1348 memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); 1349 d.d_type = kt->kt_type; 1350 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1351 break; 1352 if (cookies) 1353 *cookies++ = i + 1; 1354 n++; 1355 } 1356 if (error) { 1357 ncookies = n; 1358 break; 1359 } 1360 1361 TAILQ_FOREACH(sp, &sptailq, tailq) { 1362 if (uio->uio_resid < UIO_MX) 1363 break; 1364 if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsp_kt, 1365 sp->id, ap)) != 0) 1366 break; 1367 d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), 1368 "%u", sp->id); 1369 d.d_type = DT_REG; 1370 if ((error = uiomove(&d, UIO_MX, uio)) != 0) 1371 break; 1372 if (cookies) 1373 *cookies++ = i + 1; 1374 n++; 1375 i++; 1376 } 1377 ncookies = n; 1378 break; 1379 #endif 1380 1381 default: 1382 error = ENOTDIR; 1383 break; 1384 } 1385 1386 if (ap->a_ncookies) { 1387 if (error) { 1388 if (cookies) 1389 free(*ap->a_cookies, M_TEMP); 1390 *ap->a_ncookies = 0; 1391 *ap->a_cookies = NULL; 1392 } else 1393 *ap->a_ncookies = ncookies; 1394 } 1395 1396 uio->uio_offset = i; 1397 return (error); 1398 } 1399 1400 int 1401 kernfs_inactive(void *v) 1402 { 1403 struct vop_inactive_args /* { 1404 struct vnode *a_vp; 1405 bool *a_recycle; 1406 } */ *ap = v; 1407 struct vnode *vp = ap->a_vp; 1408 const struct kernfs_node *kfs = VTOKERN(ap->a_vp); 1409 #ifdef IPSEC 1410 struct mbuf *m; 1411 struct secpolicy *sp; 1412 #endif 1413 1414 *ap->a_recycle = false; 1415 switch (kfs->kfs_type) { 1416 #ifdef IPSEC 1417 case KFSipsecsa: 1418 if (key_setdumpsa_spi == NULL) 1419 return 0; 1420 m = key_setdumpsa_spi(htonl(kfs->kfs_value)); 1421 if (m) 1422 m_freem(m); 1423 else 1424 *ap->a_recycle = true; 1425 break; 1426 case KFSipsecsp: 1427 if (key_getspbyid == NULL) 1428 return 0; 1429 sp = key_getspbyid(kfs->kfs_value); 1430 if (sp) 1431 key_freesp(sp); 1432 else { 1433 *ap->a_recycle = true; 1434 } 1435 break; 1436 #endif 1437 default: 1438 break; 1439 } 1440 VOP_UNLOCK(vp, 0); 1441 return (0); 1442 } 1443 1444 int 1445 kernfs_reclaim(void *v) 1446 { 1447 struct vop_reclaim_args /* { 1448 struct vnode *a_vp; 1449 } */ *ap = v; 1450 1451 return (kernfs_freevp(ap->a_vp)); 1452 } 1453 1454 /* 1455 * Return POSIX pathconf information applicable to special devices. 1456 */ 1457 int 1458 kernfs_pathconf(void *v) 1459 { 1460 struct vop_pathconf_args /* { 1461 struct vnode *a_vp; 1462 int a_name; 1463 register_t *a_retval; 1464 } */ *ap = v; 1465 1466 switch (ap->a_name) { 1467 case _PC_LINK_MAX: 1468 *ap->a_retval = LINK_MAX; 1469 return (0); 1470 case _PC_MAX_CANON: 1471 *ap->a_retval = MAX_CANON; 1472 return (0); 1473 case _PC_MAX_INPUT: 1474 *ap->a_retval = MAX_INPUT; 1475 return (0); 1476 case _PC_PIPE_BUF: 1477 *ap->a_retval = PIPE_BUF; 1478 return (0); 1479 case _PC_CHOWN_RESTRICTED: 1480 *ap->a_retval = 1; 1481 return (0); 1482 case _PC_VDISABLE: 1483 *ap->a_retval = _POSIX_VDISABLE; 1484 return (0); 1485 case _PC_SYNC_IO: 1486 *ap->a_retval = 1; 1487 return (0); 1488 default: 1489 return (EINVAL); 1490 } 1491 /* NOTREACHED */ 1492 } 1493 1494 /* 1495 * Print out the contents of a /dev/fd vnode. 1496 */ 1497 /* ARGSUSED */ 1498 int 1499 kernfs_print(void *v) 1500 { 1501 1502 printf("tag VT_KERNFS, kernfs vnode\n"); 1503 return (0); 1504 } 1505 1506 int 1507 kernfs_link(void *v) 1508 { 1509 struct vop_link_args /* { 1510 struct vnode *a_dvp; 1511 struct vnode *a_vp; 1512 struct componentname *a_cnp; 1513 } */ *ap = v; 1514 1515 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1516 vput(ap->a_dvp); 1517 return (EROFS); 1518 } 1519 1520 int 1521 kernfs_symlink(void *v) 1522 { 1523 struct vop_symlink_args /* { 1524 struct vnode *a_dvp; 1525 struct vnode **a_vpp; 1526 struct componentname *a_cnp; 1527 struct vattr *a_vap; 1528 char *a_target; 1529 } */ *ap = v; 1530 1531 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1532 vput(ap->a_dvp); 1533 return (EROFS); 1534 } 1535