| 1 | /* $NetBSD: cd9660_vnops.c,v 1.54 2016/03/12 02:36:25 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1994 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley |
| 8 | * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension |
| 9 | * Support code is derived from software contributed to Berkeley |
| 10 | * by Atsushi Murai (amurai@spec.co.jp). |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * 3. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)cd9660_vnops.c 8.15 (Berkeley) 5/27/95 |
| 37 | */ |
| 38 | |
| 39 | #include <sys/cdefs.h> |
| 40 | __KERNEL_RCSID(0, "$NetBSD: cd9660_vnops.c,v 1.54 2016/03/12 02:36:25 christos Exp $" ); |
| 41 | |
| 42 | #include <sys/param.h> |
| 43 | #include <sys/systm.h> |
| 44 | #include <sys/namei.h> |
| 45 | #include <sys/resourcevar.h> |
| 46 | #include <sys/kernel.h> |
| 47 | #include <sys/file.h> |
| 48 | #include <sys/stat.h> |
| 49 | #include <sys/buf.h> |
| 50 | #include <sys/proc.h> |
| 51 | #include <sys/mount.h> |
| 52 | #include <sys/vnode.h> |
| 53 | #include <sys/malloc.h> |
| 54 | #include <sys/dirent.h> |
| 55 | #include <sys/kauth.h> |
| 56 | |
| 57 | #include <miscfs/fifofs/fifo.h> |
| 58 | #include <miscfs/genfs/genfs.h> |
| 59 | #include <miscfs/specfs/specdev.h> |
| 60 | |
| 61 | #include <fs/cd9660/iso.h> |
| 62 | #include <fs/cd9660/cd9660_extern.h> |
| 63 | #include <fs/cd9660/cd9660_node.h> |
| 64 | #include <fs/cd9660/iso_rrip.h> |
| 65 | #include <fs/cd9660/cd9660_mount.h> |
| 66 | |
| 67 | /* |
| 68 | * Structure for reading directories |
| 69 | */ |
| 70 | struct isoreaddir { |
| 71 | struct dirent saveent; |
| 72 | struct dirent assocent; |
| 73 | struct dirent current; |
| 74 | off_t saveoff; |
| 75 | off_t assocoff; |
| 76 | off_t curroff; |
| 77 | struct uio *uio; |
| 78 | off_t uio_off; |
| 79 | int eofflag; |
| 80 | off_t *cookies; |
| 81 | int ncookies; |
| 82 | }; |
| 83 | |
| 84 | int iso_uiodir(struct isoreaddir *, struct dirent *, off_t); |
| 85 | int iso_shipdir(struct isoreaddir *); |
| 86 | |
| 87 | static int |
| 88 | cd9660_check_possible(struct vnode *vp, struct iso_node *ip, mode_t mode) |
| 89 | { |
| 90 | |
| 91 | /* |
| 92 | * Disallow write attempts unless the file is a socket, |
| 93 | * fifo, or a block or character device resident on the |
| 94 | * file system. |
| 95 | */ |
| 96 | if (mode & VWRITE) { |
| 97 | switch (vp->v_type) { |
| 98 | case VDIR: |
| 99 | case VLNK: |
| 100 | case VREG: |
| 101 | return (EROFS); |
| 102 | default: |
| 103 | break; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | /* |
| 111 | * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. |
| 112 | * The mode is shifted to select the owner/group/other fields. The |
| 113 | * super user is granted all permissions. |
| 114 | */ |
| 115 | static int |
| 116 | cd9660_check_permitted(struct vnode *vp, struct iso_node *ip, mode_t mode, |
| 117 | kauth_cred_t cred) |
| 118 | { |
| 119 | |
| 120 | return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, |
| 121 | vp->v_type, ip->inode.iso_mode & ALLPERMS), vp, NULL, |
| 122 | genfs_can_access(vp->v_type, ip->inode.iso_mode & ALLPERMS, |
| 123 | ip->inode.iso_uid, ip->inode.iso_gid, mode, cred)); |
| 124 | } |
| 125 | |
| 126 | int |
| 127 | cd9660_access(void *v) |
| 128 | { |
| 129 | struct vop_access_args /* { |
| 130 | struct vnode *a_vp; |
| 131 | int a_mode; |
| 132 | kauth_cred_t a_cred; |
| 133 | } */ *ap = v; |
| 134 | struct vnode *vp = ap->a_vp; |
| 135 | struct iso_node *ip = VTOI(vp); |
| 136 | int error; |
| 137 | |
| 138 | error = cd9660_check_possible(vp, ip, ap->a_mode); |
| 139 | if (error) |
| 140 | return error; |
| 141 | |
| 142 | error = cd9660_check_permitted(vp, ip, ap->a_mode, ap->a_cred); |
| 143 | |
| 144 | return error; |
| 145 | } |
| 146 | |
| 147 | int |
| 148 | cd9660_getattr(void *v) |
| 149 | { |
| 150 | struct vop_getattr_args /* { |
| 151 | struct vnode *a_vp; |
| 152 | struct vattr *a_vap; |
| 153 | kauth_cred_t a_cred; |
| 154 | } */ *ap = v; |
| 155 | struct vnode *vp = ap->a_vp; |
| 156 | struct iso_node *ip = VTOI(vp); |
| 157 | struct vattr *vap = ap->a_vap; |
| 158 | |
| 159 | vap->va_fsid = ip->i_dev; |
| 160 | vap->va_fileid = ip->i_number; |
| 161 | |
| 162 | vap->va_mode = ip->inode.iso_mode & ALLPERMS; |
| 163 | vap->va_nlink = ip->inode.iso_links; |
| 164 | vap->va_uid = ip->inode.iso_uid; |
| 165 | vap->va_gid = ip->inode.iso_gid; |
| 166 | vap->va_atime = ip->inode.iso_atime; |
| 167 | vap->va_mtime = ip->inode.iso_mtime; |
| 168 | vap->va_ctime = ip->inode.iso_ctime; |
| 169 | vap->va_rdev = ip->inode.iso_rdev; |
| 170 | |
| 171 | vap->va_size = (u_quad_t) ip->i_size; |
| 172 | if (ip->i_size == 0 && vp->v_type == VLNK) { |
| 173 | struct vop_readlink_args rdlnk; |
| 174 | struct iovec aiov; |
| 175 | struct uio auio; |
| 176 | char *cp; |
| 177 | |
| 178 | cp = (char *)malloc(MAXPATHLEN, M_TEMP, M_WAITOK); |
| 179 | aiov.iov_base = cp; |
| 180 | aiov.iov_len = MAXPATHLEN; |
| 181 | auio.uio_iov = &aiov; |
| 182 | auio.uio_iovcnt = 1; |
| 183 | auio.uio_offset = 0; |
| 184 | auio.uio_rw = UIO_READ; |
| 185 | auio.uio_resid = MAXPATHLEN; |
| 186 | UIO_SETUP_SYSSPACE(&auio); |
| 187 | rdlnk.a_uio = &auio; |
| 188 | rdlnk.a_vp = ap->a_vp; |
| 189 | rdlnk.a_cred = ap->a_cred; |
| 190 | if (cd9660_readlink(&rdlnk) == 0) |
| 191 | vap->va_size = MAXPATHLEN - auio.uio_resid; |
| 192 | free(cp, M_TEMP); |
| 193 | } |
| 194 | vap->va_flags = 0; |
| 195 | vap->va_gen = 1; |
| 196 | vap->va_blocksize = ip->i_mnt->logical_block_size; |
| 197 | vap->va_bytes = (u_quad_t) ip->i_size; |
| 198 | vap->va_type = vp->v_type; |
| 199 | return (0); |
| 200 | } |
| 201 | |
| 202 | /* |
| 203 | * Vnode op for reading. |
| 204 | */ |
| 205 | int |
| 206 | cd9660_read(void *v) |
| 207 | { |
| 208 | struct vop_read_args /* { |
| 209 | struct vnode *a_vp; |
| 210 | struct uio *a_uio; |
| 211 | int a_ioflag; |
| 212 | kauth_cred_t a_cred; |
| 213 | } */ *ap = v; |
| 214 | struct vnode *vp = ap->a_vp; |
| 215 | struct uio *uio = ap->a_uio; |
| 216 | struct iso_node *ip = VTOI(vp); |
| 217 | struct iso_mnt *imp; |
| 218 | struct buf *bp; |
| 219 | daddr_t lbn, rablock; |
| 220 | off_t diff; |
| 221 | int rasize, error = 0; |
| 222 | long size, n, on; |
| 223 | |
| 224 | if (uio->uio_resid == 0) |
| 225 | return (0); |
| 226 | if (uio->uio_offset < 0) |
| 227 | return (EINVAL); |
| 228 | if (uio->uio_offset >= ip->i_size) |
| 229 | return 0; |
| 230 | ip->i_flag |= IN_ACCESS; |
| 231 | imp = ip->i_mnt; |
| 232 | |
| 233 | if (vp->v_type == VREG) { |
| 234 | const int advice = IO_ADV_DECODE(ap->a_ioflag); |
| 235 | error = 0; |
| 236 | |
| 237 | while (uio->uio_resid > 0) { |
| 238 | vsize_t bytelen = MIN(ip->i_size - uio->uio_offset, |
| 239 | uio->uio_resid); |
| 240 | |
| 241 | if (bytelen == 0) |
| 242 | break; |
| 243 | error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, |
| 244 | UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); |
| 245 | if (error) |
| 246 | break; |
| 247 | } |
| 248 | goto out; |
| 249 | } |
| 250 | |
| 251 | do { |
| 252 | lbn = cd9660_lblkno(imp, uio->uio_offset); |
| 253 | on = cd9660_blkoff(imp, uio->uio_offset); |
| 254 | n = MIN(imp->logical_block_size - on, uio->uio_resid); |
| 255 | diff = (off_t)ip->i_size - uio->uio_offset; |
| 256 | if (diff <= 0) |
| 257 | return (0); |
| 258 | if (diff < n) |
| 259 | n = diff; |
| 260 | size = cd9660_blksize(imp, ip, lbn); |
| 261 | rablock = lbn + 1; |
| 262 | if (cd9660_lblktosize(imp, rablock) < ip->i_size) { |
| 263 | rasize = cd9660_blksize(imp, ip, rablock); |
| 264 | error = breadn(vp, lbn, size, &rablock, |
| 265 | &rasize, 1, 0, &bp); |
| 266 | } else { |
| 267 | error = bread(vp, lbn, size, 0, &bp); |
| 268 | } |
| 269 | if (error) { |
| 270 | return (error); |
| 271 | } |
| 272 | n = MIN(n, size - bp->b_resid); |
| 273 | |
| 274 | error = uiomove((char *)bp->b_data + on, (int)n, uio); |
| 275 | brelse(bp, 0); |
| 276 | } while (error == 0 && uio->uio_resid > 0 && n != 0); |
| 277 | |
| 278 | out: |
| 279 | return (error); |
| 280 | } |
| 281 | |
| 282 | int |
| 283 | iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) |
| 284 | { |
| 285 | int error; |
| 286 | |
| 287 | dp->d_name[dp->d_namlen] = 0; |
| 288 | dp->d_reclen = _DIRENT_SIZE(dp); |
| 289 | |
| 290 | if (idp->uio->uio_resid < dp->d_reclen) { |
| 291 | idp->eofflag = 0; |
| 292 | return (-1); |
| 293 | } |
| 294 | |
| 295 | if (idp->cookies) { |
| 296 | if (idp->ncookies <= 0) { |
| 297 | idp->eofflag = 0; |
| 298 | return (-1); |
| 299 | } |
| 300 | |
| 301 | *idp->cookies++ = off; |
| 302 | --idp->ncookies; |
| 303 | } |
| 304 | |
| 305 | if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) |
| 306 | return (error); |
| 307 | idp->uio_off = off; |
| 308 | return (0); |
| 309 | } |
| 310 | |
| 311 | int |
| 312 | iso_shipdir(struct isoreaddir *idp) |
| 313 | { |
| 314 | struct dirent *dp; |
| 315 | int cl, sl, assoc; |
| 316 | int error; |
| 317 | char *cname, *sname; |
| 318 | |
| 319 | cl = idp->current.d_namlen; |
| 320 | cname = idp->current.d_name; |
| 321 | |
| 322 | assoc = (cl > 1) && (*cname == ASSOCCHAR); |
| 323 | if (assoc) { |
| 324 | cl--; |
| 325 | cname++; |
| 326 | } |
| 327 | |
| 328 | dp = &idp->saveent; |
| 329 | sname = dp->d_name; |
| 330 | if (!(sl = dp->d_namlen)) { |
| 331 | dp = &idp->assocent; |
| 332 | sname = dp->d_name + 1; |
| 333 | sl = dp->d_namlen - 1; |
| 334 | } |
| 335 | if (sl > 0) { |
| 336 | if (sl != cl |
| 337 | || memcmp(sname, cname, sl)) { |
| 338 | if (idp->assocent.d_namlen) { |
| 339 | error = iso_uiodir(idp, &idp->assocent, |
| 340 | idp->assocoff); |
| 341 | if (error) |
| 342 | return (error); |
| 343 | idp->assocent.d_namlen = 0; |
| 344 | } |
| 345 | if (idp->saveent.d_namlen) { |
| 346 | error = iso_uiodir(idp, &idp->saveent, |
| 347 | idp->saveoff); |
| 348 | if (error) |
| 349 | return (error); |
| 350 | idp->saveent.d_namlen = 0; |
| 351 | } |
| 352 | } |
| 353 | } |
| 354 | idp->current.d_reclen = _DIRENT_SIZE(&idp->current); |
| 355 | if (assoc) { |
| 356 | idp->assocoff = idp->curroff; |
| 357 | memcpy(&idp->assocent, &idp->current, idp->current.d_reclen); |
| 358 | } else { |
| 359 | idp->saveoff = idp->curroff; |
| 360 | memcpy(&idp->saveent, &idp->current, idp->current.d_reclen); |
| 361 | } |
| 362 | return (0); |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * Vnode op for readdir |
| 367 | */ |
| 368 | int |
| 369 | cd9660_readdir(void *v) |
| 370 | { |
| 371 | struct vop_readdir_args /* { |
| 372 | struct vnode *a_vp; |
| 373 | struct uio *a_uio; |
| 374 | kauth_cred_t a_cred; |
| 375 | int *a_eofflag; |
| 376 | off_t **a_cookies; |
| 377 | int *a_ncookies; |
| 378 | } */ *ap = v; |
| 379 | struct uio *uio = ap->a_uio; |
| 380 | struct isoreaddir *idp; |
| 381 | struct vnode *vdp = ap->a_vp; |
| 382 | struct iso_node *dp; |
| 383 | struct iso_mnt *imp; |
| 384 | struct buf *bp = NULL; |
| 385 | struct iso_directory_record *ep; |
| 386 | int entryoffsetinblock; |
| 387 | doff_t endsearch; |
| 388 | u_long bmask; |
| 389 | int error = 0; |
| 390 | int reclen; |
| 391 | u_short namelen; |
| 392 | off_t *cookies = NULL; |
| 393 | int ncookies = 0; |
| 394 | |
| 395 | if (vdp->v_type != VDIR) |
| 396 | return (ENOTDIR); |
| 397 | |
| 398 | dp = VTOI(vdp); |
| 399 | imp = dp->i_mnt; |
| 400 | bmask = imp->im_bmask; |
| 401 | |
| 402 | idp = (struct isoreaddir *)malloc(sizeof(*idp), M_TEMP, M_WAITOK); |
| 403 | idp->saveent.d_namlen = idp->assocent.d_namlen = 0; |
| 404 | /* |
| 405 | * XXX |
| 406 | * Is it worth trying to figure out the type? |
| 407 | */ |
| 408 | idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = |
| 409 | DT_UNKNOWN; |
| 410 | idp->uio = uio; |
| 411 | if (ap->a_ncookies == NULL) |
| 412 | idp->cookies = NULL; |
| 413 | else { |
| 414 | ncookies = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); |
| 415 | cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); |
| 416 | idp->cookies = cookies; |
| 417 | idp->ncookies = ncookies; |
| 418 | } |
| 419 | idp->eofflag = 1; |
| 420 | idp->curroff = uio->uio_offset; |
| 421 | |
| 422 | if ((entryoffsetinblock = idp->curroff & bmask) && |
| 423 | (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { |
| 424 | free(idp, M_TEMP); |
| 425 | return (error); |
| 426 | } |
| 427 | endsearch = dp->i_size; |
| 428 | |
| 429 | while (idp->curroff < endsearch) { |
| 430 | /* |
| 431 | * If offset is on a block boundary, |
| 432 | * read the next directory block. |
| 433 | * Release previous if it exists. |
| 434 | */ |
| 435 | if ((idp->curroff & bmask) == 0) { |
| 436 | if (bp != NULL) |
| 437 | brelse(bp, 0); |
| 438 | error = cd9660_blkatoff(vdp, (off_t)idp->curroff, |
| 439 | NULL, &bp); |
| 440 | if (error) |
| 441 | break; |
| 442 | entryoffsetinblock = 0; |
| 443 | } |
| 444 | /* |
| 445 | * Get pointer to next entry. |
| 446 | */ |
| 447 | KASSERT(bp != NULL); |
| 448 | ep = (struct iso_directory_record *) |
| 449 | ((char *)bp->b_data + entryoffsetinblock); |
| 450 | |
| 451 | reclen = isonum_711(ep->length); |
| 452 | if (reclen == 0) { |
| 453 | /* skip to next block, if any */ |
| 454 | idp->curroff = |
| 455 | (idp->curroff & ~bmask) + imp->logical_block_size; |
| 456 | continue; |
| 457 | } |
| 458 | |
| 459 | if (reclen < ISO_DIRECTORY_RECORD_SIZE) { |
| 460 | error = EINVAL; |
| 461 | /* illegal entry, stop */ |
| 462 | break; |
| 463 | } |
| 464 | |
| 465 | if (entryoffsetinblock + reclen > imp->logical_block_size) { |
| 466 | error = EINVAL; |
| 467 | /* illegal directory, so stop looking */ |
| 468 | break; |
| 469 | } |
| 470 | |
| 471 | idp->current.d_namlen = isonum_711(ep->name_len); |
| 472 | |
| 473 | if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { |
| 474 | error = EINVAL; |
| 475 | /* illegal entry, stop */ |
| 476 | break; |
| 477 | } |
| 478 | |
| 479 | if (isonum_711(ep->flags)&2) |
| 480 | idp->current.d_fileno = isodirino(ep, imp); |
| 481 | else |
| 482 | idp->current.d_fileno = dbtob(bp->b_blkno) + |
| 483 | entryoffsetinblock; |
| 484 | |
| 485 | idp->curroff += reclen; |
| 486 | |
| 487 | switch (imp->iso_ftype) { |
| 488 | case ISO_FTYPE_RRIP: |
| 489 | cd9660_rrip_getname(ep, idp->current.d_name, &namelen, |
| 490 | &idp->current.d_fileno, imp); |
| 491 | idp->current.d_namlen = (u_char)namelen; |
| 492 | if (idp->current.d_namlen) |
| 493 | error = iso_uiodir(idp, &idp->current, |
| 494 | idp->curroff); |
| 495 | break; |
| 496 | default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */ |
| 497 | isofntrans(ep->name, idp->current.d_namlen, |
| 498 | idp->current.d_name, &namelen, |
| 499 | imp->iso_ftype == ISO_FTYPE_9660, |
| 500 | (imp->im_flags & ISOFSMNT_NOCASETRANS) == 0, |
| 501 | isonum_711(ep->flags)&4, |
| 502 | imp->im_joliet_level); |
| 503 | switch (idp->current.d_name[0]) { |
| 504 | case 0: |
| 505 | idp->current.d_name[0] = '.'; |
| 506 | idp->current.d_namlen = 1; |
| 507 | error = iso_uiodir(idp, &idp->current, |
| 508 | idp->curroff); |
| 509 | break; |
| 510 | case 1: |
| 511 | strlcpy(idp->current.d_name, ".." , |
| 512 | sizeof(idp->current.d_name)); |
| 513 | idp->current.d_namlen = 2; |
| 514 | error = iso_uiodir(idp, &idp->current, |
| 515 | idp->curroff); |
| 516 | break; |
| 517 | default: |
| 518 | idp->current.d_namlen = (u_char)namelen; |
| 519 | if (imp->iso_ftype == ISO_FTYPE_DEFAULT) |
| 520 | error = iso_shipdir(idp); |
| 521 | else |
| 522 | error = iso_uiodir(idp, &idp->current, |
| 523 | idp->curroff); |
| 524 | break; |
| 525 | } |
| 526 | } |
| 527 | if (error) |
| 528 | break; |
| 529 | |
| 530 | entryoffsetinblock += reclen; |
| 531 | } |
| 532 | |
| 533 | if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { |
| 534 | idp->current.d_namlen = 0; |
| 535 | error = iso_shipdir(idp); |
| 536 | } |
| 537 | if (error < 0) |
| 538 | error = 0; |
| 539 | |
| 540 | if (ap->a_ncookies != NULL) { |
| 541 | if (error) |
| 542 | free(cookies, M_TEMP); |
| 543 | else { |
| 544 | /* |
| 545 | * Work out the number of cookies actually used. |
| 546 | */ |
| 547 | *ap->a_ncookies = ncookies - idp->ncookies; |
| 548 | *ap->a_cookies = cookies; |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | if (bp) |
| 553 | brelse(bp, 0); |
| 554 | |
| 555 | uio->uio_offset = idp->uio_off; |
| 556 | *ap->a_eofflag = idp->eofflag; |
| 557 | |
| 558 | free(idp, M_TEMP); |
| 559 | |
| 560 | return (error); |
| 561 | } |
| 562 | |
| 563 | /* |
| 564 | * Return target name of a symbolic link |
| 565 | * Shouldn't we get the parent vnode and read the data from there? |
| 566 | * This could eventually result in deadlocks in cd9660_lookup. |
| 567 | * But otherwise the block read here is in the block buffer two times. |
| 568 | */ |
| 569 | typedef struct iso_directory_record ISODIR; |
| 570 | typedef struct iso_node ISONODE; |
| 571 | typedef struct iso_mnt ISOMNT; |
| 572 | |
| 573 | int |
| 574 | cd9660_readlink(void *v) |
| 575 | { |
| 576 | struct vop_readlink_args /* { |
| 577 | struct vnode *a_vp; |
| 578 | struct uio *a_uio; |
| 579 | kauth_cred_t a_cred; |
| 580 | } */ *ap = v; |
| 581 | ISONODE *ip; |
| 582 | ISODIR *dirp; |
| 583 | ISOMNT *imp; |
| 584 | struct buf *bp; |
| 585 | struct uio *uio; |
| 586 | u_short symlen; |
| 587 | int error; |
| 588 | char *symname; |
| 589 | bool use_pnbuf; |
| 590 | |
| 591 | ip = VTOI(ap->a_vp); |
| 592 | imp = ip->i_mnt; |
| 593 | uio = ap->a_uio; |
| 594 | |
| 595 | if (imp->iso_ftype != ISO_FTYPE_RRIP) |
| 596 | return (EINVAL); |
| 597 | |
| 598 | /* |
| 599 | * Get parents directory record block that this inode included. |
| 600 | */ |
| 601 | error = bread(imp->im_devvp, |
| 602 | (ip->i_number >> imp->im_bshift) << |
| 603 | (imp->im_bshift - DEV_BSHIFT), |
| 604 | imp->logical_block_size, 0, &bp); |
| 605 | if (error) { |
| 606 | return (EINVAL); |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * Setup the directory pointer for this inode |
| 611 | */ |
| 612 | dirp = (ISODIR *)((char *)bp->b_data + (ip->i_number & imp->im_bmask)); |
| 613 | |
| 614 | /* |
| 615 | * Just make sure, we have a right one.... |
| 616 | * 1: Check not cross boundary on block |
| 617 | */ |
| 618 | if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) |
| 619 | > imp->logical_block_size) { |
| 620 | brelse(bp, 0); |
| 621 | return (EINVAL); |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Now get a buffer |
| 626 | * Abuse a namei buffer for now. |
| 627 | */ |
| 628 | use_pnbuf = !VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || |
| 629 | uio->uio_iov->iov_len < MAXPATHLEN; |
| 630 | if (use_pnbuf) { |
| 631 | symname = PNBUF_GET(); |
| 632 | } else { |
| 633 | symname = uio->uio_iov->iov_base; |
| 634 | } |
| 635 | |
| 636 | /* |
| 637 | * Ok, we just gathering a symbolic name in SL record. |
| 638 | */ |
| 639 | if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { |
| 640 | if (use_pnbuf) { |
| 641 | PNBUF_PUT(symname); |
| 642 | } |
| 643 | brelse(bp, 0); |
| 644 | return (EINVAL); |
| 645 | } |
| 646 | /* |
| 647 | * Don't forget before you leave from home ;-) |
| 648 | */ |
| 649 | brelse(bp, 0); |
| 650 | |
| 651 | /* |
| 652 | * return with the symbolic name to caller's. |
| 653 | */ |
| 654 | if (use_pnbuf) { |
| 655 | error = uiomove(symname, symlen, uio); |
| 656 | PNBUF_PUT(symname); |
| 657 | return (error); |
| 658 | } |
| 659 | uio->uio_resid -= symlen; |
| 660 | uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; |
| 661 | uio->uio_iov->iov_len -= symlen; |
| 662 | return (0); |
| 663 | } |
| 664 | |
| 665 | int |
| 666 | cd9660_link(void *v) |
| 667 | { |
| 668 | struct vop_link_v2_args /* { |
| 669 | struct vnode *a_dvp; |
| 670 | struct vnode *a_vp; |
| 671 | struct componentname *a_cnp; |
| 672 | } */ *ap = v; |
| 673 | |
| 674 | VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
| 675 | return (EROFS); |
| 676 | } |
| 677 | |
| 678 | int |
| 679 | cd9660_symlink(void *v) |
| 680 | { |
| 681 | struct vop_symlink_v3_args /* { |
| 682 | struct vnode *a_dvp; |
| 683 | struct vnode **a_vpp; |
| 684 | struct componentname *a_cnp; |
| 685 | struct vattr *a_vap; |
| 686 | char *a_target; |
| 687 | } */ *ap = v; |
| 688 | |
| 689 | VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
| 690 | return (EROFS); |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * Calculate the logical to physical mapping if not done already, |
| 695 | * then call the device strategy routine. |
| 696 | */ |
| 697 | int |
| 698 | cd9660_strategy(void *v) |
| 699 | { |
| 700 | struct vop_strategy_args /* { |
| 701 | struct vnode *a_vp; |
| 702 | struct buf *a_bp; |
| 703 | } */ *ap = v; |
| 704 | struct buf *bp = ap->a_bp; |
| 705 | struct vnode *vp = ap->a_vp; |
| 706 | struct iso_node *ip; |
| 707 | int error; |
| 708 | |
| 709 | ip = VTOI(vp); |
| 710 | if (vp->v_type == VBLK || vp->v_type == VCHR) |
| 711 | panic("cd9660_strategy: spec" ); |
| 712 | if (bp->b_blkno == bp->b_lblkno) { |
| 713 | error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); |
| 714 | if (error) { |
| 715 | bp->b_error = error; |
| 716 | biodone(bp); |
| 717 | return (error); |
| 718 | } |
| 719 | if ((long)bp->b_blkno == -1) |
| 720 | clrbuf(bp); |
| 721 | } |
| 722 | if ((long)bp->b_blkno == -1) { |
| 723 | biodone(bp); |
| 724 | return (0); |
| 725 | } |
| 726 | vp = ip->i_mnt->im_devvp; |
| 727 | return (VOP_STRATEGY(vp, bp)); |
| 728 | } |
| 729 | |
| 730 | /* |
| 731 | * Print out the contents of an inode. |
| 732 | */ |
| 733 | /*ARGSUSED*/ |
| 734 | int |
| 735 | cd9660_print(void *v) |
| 736 | { |
| 737 | |
| 738 | printf("tag VT_ISOFS, isofs vnode\n" ); |
| 739 | return (0); |
| 740 | } |
| 741 | |
| 742 | /* |
| 743 | * Return POSIX pathconf information applicable to cd9660 filesystems. |
| 744 | */ |
| 745 | int |
| 746 | cd9660_pathconf(void *v) |
| 747 | { |
| 748 | struct vop_pathconf_args /* { |
| 749 | struct vnode *a_vp; |
| 750 | int a_name; |
| 751 | register_t *a_retval; |
| 752 | } */ *ap = v; |
| 753 | switch (ap->a_name) { |
| 754 | case _PC_LINK_MAX: |
| 755 | *ap->a_retval = 1; |
| 756 | return (0); |
| 757 | case _PC_NAME_MAX: |
| 758 | if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) |
| 759 | *ap->a_retval = ISO_MAXNAMLEN; |
| 760 | else |
| 761 | *ap->a_retval = 37; |
| 762 | return (0); |
| 763 | case _PC_PATH_MAX: |
| 764 | *ap->a_retval = PATH_MAX; |
| 765 | return (0); |
| 766 | case _PC_PIPE_BUF: |
| 767 | *ap->a_retval = PIPE_BUF; |
| 768 | return (0); |
| 769 | case _PC_CHOWN_RESTRICTED: |
| 770 | *ap->a_retval = 1; |
| 771 | return (0); |
| 772 | case _PC_NO_TRUNC: |
| 773 | *ap->a_retval = 1; |
| 774 | return (0); |
| 775 | case _PC_SYNC_IO: |
| 776 | *ap->a_retval = 1; |
| 777 | return (0); |
| 778 | case _PC_FILESIZEBITS: |
| 779 | *ap->a_retval = 32; |
| 780 | return (0); |
| 781 | default: |
| 782 | return (EINVAL); |
| 783 | } |
| 784 | /* NOTREACHED */ |
| 785 | } |
| 786 | |
| 787 | /* |
| 788 | * Allow changing the size for special files (and fifos). |
| 789 | */ |
| 790 | int |
| 791 | cd9660_setattr(void *v) |
| 792 | { |
| 793 | struct vop_setattr_args /* { |
| 794 | struct vnodeop_desc *a_desc; |
| 795 | struct vnode *a_vp; |
| 796 | struct vattr *a_vap; |
| 797 | kauth_cred_t a_cred; |
| 798 | struct proc *a_p; |
| 799 | } */ *ap = v; |
| 800 | struct vattr *vap = ap->a_vap; |
| 801 | struct vnode *vp = ap->a_vp; |
| 802 | |
| 803 | /* |
| 804 | * Only size is changeable. |
| 805 | */ |
| 806 | if (vap->va_type != VNON |
| 807 | || vap->va_nlink != (nlink_t)VNOVAL |
| 808 | || vap->va_fsid != VNOVAL |
| 809 | || vap->va_fileid != VNOVAL |
| 810 | || vap->va_blocksize != VNOVAL |
| 811 | || vap->va_rdev != (dev_t)VNOVAL |
| 812 | || (int)vap->va_bytes != VNOVAL |
| 813 | || vap->va_gen != VNOVAL |
| 814 | || vap->va_flags != VNOVAL |
| 815 | || vap->va_uid != (uid_t)VNOVAL |
| 816 | || vap->va_gid != (gid_t)VNOVAL |
| 817 | || vap->va_atime.tv_sec != VNOVAL |
| 818 | || vap->va_mtime.tv_sec != VNOVAL |
| 819 | || vap->va_mode != (mode_t)VNOVAL) |
| 820 | return EOPNOTSUPP; |
| 821 | |
| 822 | if (vap->va_size != VNOVAL |
| 823 | && vp->v_type != VCHR |
| 824 | && vp->v_type != VBLK |
| 825 | && vp->v_type != VFIFO) |
| 826 | return EOPNOTSUPP; |
| 827 | |
| 828 | return 0; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * Global vfs data structures for isofs |
| 833 | */ |
| 834 | #define cd9660_create genfs_eopnotsupp |
| 835 | #define cd9660_mknod genfs_eopnotsupp |
| 836 | #define cd9660_write genfs_eopnotsupp |
| 837 | #define cd9660_fsync genfs_nullop |
| 838 | #define cd9660_remove genfs_eopnotsupp |
| 839 | #define cd9660_rename genfs_eopnotsupp |
| 840 | #define cd9660_mkdir genfs_eopnotsupp |
| 841 | #define cd9660_rmdir genfs_eopnotsupp |
| 842 | #define cd9660_advlock genfs_einval |
| 843 | #define cd9660_bwrite genfs_eopnotsupp |
| 844 | #define cd9660_revoke genfs_revoke |
| 845 | |
| 846 | /* |
| 847 | * Global vfs data structures for cd9660 |
| 848 | */ |
| 849 | int (**cd9660_vnodeop_p)(void *); |
| 850 | const struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = { |
| 851 | { &vop_default_desc, vn_default_error }, |
| 852 | { &vop_lookup_desc, cd9660_lookup }, /* lookup */ |
| 853 | { &vop_create_desc, cd9660_create }, /* create */ |
| 854 | { &vop_mknod_desc, cd9660_mknod }, /* mknod */ |
| 855 | { &vop_open_desc, cd9660_open }, /* open */ |
| 856 | { &vop_close_desc, cd9660_close }, /* close */ |
| 857 | { &vop_access_desc, cd9660_access }, /* access */ |
| 858 | { &vop_getattr_desc, cd9660_getattr }, /* getattr */ |
| 859 | { &vop_setattr_desc, cd9660_setattr }, /* setattr */ |
| 860 | { &vop_read_desc, cd9660_read }, /* read */ |
| 861 | { &vop_write_desc, cd9660_write }, /* write */ |
| 862 | { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ |
| 863 | { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ |
| 864 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
| 865 | { &vop_ioctl_desc, cd9660_ioctl }, /* ioctl */ |
| 866 | { &vop_poll_desc, cd9660_poll }, /* poll */ |
| 867 | { &vop_revoke_desc, cd9660_revoke }, /* revoke */ |
| 868 | { &vop_mmap_desc, cd9660_mmap }, /* mmap */ |
| 869 | { &vop_fsync_desc, cd9660_fsync }, /* fsync */ |
| 870 | { &vop_seek_desc, cd9660_seek }, /* seek */ |
| 871 | { &vop_remove_desc, cd9660_remove }, /* remove */ |
| 872 | { &vop_link_desc, cd9660_link }, /* link */ |
| 873 | { &vop_rename_desc, cd9660_rename }, /* rename */ |
| 874 | { &vop_mkdir_desc, cd9660_mkdir }, /* mkdir */ |
| 875 | { &vop_rmdir_desc, cd9660_rmdir }, /* rmdir */ |
| 876 | { &vop_symlink_desc, cd9660_symlink }, /* symlink */ |
| 877 | { &vop_readdir_desc, cd9660_readdir }, /* readdir */ |
| 878 | { &vop_readlink_desc, cd9660_readlink }, /* readlink */ |
| 879 | { &vop_abortop_desc, cd9660_abortop }, /* abortop */ |
| 880 | { &vop_inactive_desc, cd9660_inactive }, /* inactive */ |
| 881 | { &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */ |
| 882 | { &vop_lock_desc, genfs_lock }, /* lock */ |
| 883 | { &vop_unlock_desc, genfs_unlock }, /* unlock */ |
| 884 | { &vop_bmap_desc, cd9660_bmap }, /* bmap */ |
| 885 | { &vop_strategy_desc, cd9660_strategy }, /* strategy */ |
| 886 | { &vop_print_desc, cd9660_print }, /* print */ |
| 887 | { &vop_islocked_desc, genfs_islocked }, /* islocked */ |
| 888 | { &vop_pathconf_desc, cd9660_pathconf }, /* pathconf */ |
| 889 | { &vop_advlock_desc, cd9660_advlock }, /* advlock */ |
| 890 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
| 891 | { &vop_getpages_desc, genfs_getpages }, /* getpages */ |
| 892 | { &vop_putpages_desc, genfs_putpages }, /* putpages */ |
| 893 | { NULL, NULL } |
| 894 | }; |
| 895 | const struct vnodeopv_desc cd9660_vnodeop_opv_desc = |
| 896 | { &cd9660_vnodeop_p, cd9660_vnodeop_entries }; |
| 897 | |
| 898 | /* |
| 899 | * Special device vnode ops |
| 900 | */ |
| 901 | int (**cd9660_specop_p)(void *); |
| 902 | const struct vnodeopv_entry_desc cd9660_specop_entries[] = { |
| 903 | { &vop_default_desc, vn_default_error }, |
| 904 | { &vop_lookup_desc, spec_lookup }, /* lookup */ |
| 905 | { &vop_create_desc, spec_create }, /* create */ |
| 906 | { &vop_mknod_desc, spec_mknod }, /* mknod */ |
| 907 | { &vop_open_desc, spec_open }, /* open */ |
| 908 | { &vop_close_desc, spec_close }, /* close */ |
| 909 | { &vop_access_desc, cd9660_access }, /* access */ |
| 910 | { &vop_getattr_desc, cd9660_getattr }, /* getattr */ |
| 911 | { &vop_setattr_desc, cd9660_setattr }, /* setattr */ |
| 912 | { &vop_read_desc, spec_read }, /* read */ |
| 913 | { &vop_write_desc, spec_write }, /* write */ |
| 914 | { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ |
| 915 | { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ |
| 916 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
| 917 | { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ |
| 918 | { &vop_poll_desc, spec_poll }, /* poll */ |
| 919 | { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ |
| 920 | { &vop_revoke_desc, spec_revoke }, /* revoke */ |
| 921 | { &vop_mmap_desc, spec_mmap }, /* mmap */ |
| 922 | { &vop_fsync_desc, spec_fsync }, /* fsync */ |
| 923 | { &vop_seek_desc, spec_seek }, /* seek */ |
| 924 | { &vop_remove_desc, spec_remove }, /* remove */ |
| 925 | { &vop_link_desc, spec_link }, /* link */ |
| 926 | { &vop_rename_desc, spec_rename }, /* rename */ |
| 927 | { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ |
| 928 | { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ |
| 929 | { &vop_symlink_desc, spec_symlink }, /* symlink */ |
| 930 | { &vop_readdir_desc, spec_readdir }, /* readdir */ |
| 931 | { &vop_readlink_desc, spec_readlink }, /* readlink */ |
| 932 | { &vop_abortop_desc, spec_abortop }, /* abortop */ |
| 933 | { &vop_inactive_desc, cd9660_inactive }, /* inactive */ |
| 934 | { &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */ |
| 935 | { &vop_lock_desc, genfs_lock }, /* lock */ |
| 936 | { &vop_unlock_desc, genfs_unlock }, /* unlock */ |
| 937 | { &vop_bmap_desc, spec_bmap }, /* bmap */ |
| 938 | { &vop_strategy_desc, spec_strategy }, /* strategy */ |
| 939 | { &vop_print_desc, cd9660_print }, /* print */ |
| 940 | { &vop_islocked_desc, genfs_islocked }, /* islocked */ |
| 941 | { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ |
| 942 | { &vop_advlock_desc, spec_advlock }, /* advlock */ |
| 943 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
| 944 | { &vop_getpages_desc, spec_getpages }, /* getpages */ |
| 945 | { &vop_putpages_desc, spec_putpages }, /* putpages */ |
| 946 | { NULL, NULL } |
| 947 | }; |
| 948 | const struct vnodeopv_desc cd9660_specop_opv_desc = |
| 949 | { &cd9660_specop_p, cd9660_specop_entries }; |
| 950 | |
| 951 | int (**cd9660_fifoop_p)(void *); |
| 952 | const struct vnodeopv_entry_desc cd9660_fifoop_entries[] = { |
| 953 | { &vop_default_desc, vn_default_error }, |
| 954 | { &vop_lookup_desc, vn_fifo_bypass }, /* lookup */ |
| 955 | { &vop_create_desc, vn_fifo_bypass }, /* create */ |
| 956 | { &vop_mknod_desc, vn_fifo_bypass }, /* mknod */ |
| 957 | { &vop_open_desc, vn_fifo_bypass }, /* open */ |
| 958 | { &vop_close_desc, vn_fifo_bypass }, /* close */ |
| 959 | { &vop_access_desc, cd9660_access }, /* access */ |
| 960 | { &vop_getattr_desc, cd9660_getattr }, /* getattr */ |
| 961 | { &vop_setattr_desc, cd9660_setattr }, /* setattr */ |
| 962 | { &vop_read_desc, vn_fifo_bypass }, /* read */ |
| 963 | { &vop_write_desc, vn_fifo_bypass }, /* write */ |
| 964 | { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ |
| 965 | { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ |
| 966 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
| 967 | { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ |
| 968 | { &vop_poll_desc, vn_fifo_bypass }, /* poll */ |
| 969 | { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ |
| 970 | { &vop_revoke_desc, vn_fifo_bypass }, /* revoke */ |
| 971 | { &vop_mmap_desc, vn_fifo_bypass }, /* mmap */ |
| 972 | { &vop_fsync_desc, vn_fifo_bypass }, /* fsync */ |
| 973 | { &vop_seek_desc, vn_fifo_bypass }, /* seek */ |
| 974 | { &vop_remove_desc, vn_fifo_bypass }, /* remove */ |
| 975 | { &vop_link_desc, vn_fifo_bypass } , /* link */ |
| 976 | { &vop_rename_desc, vn_fifo_bypass }, /* rename */ |
| 977 | { &vop_mkdir_desc, vn_fifo_bypass }, /* mkdir */ |
| 978 | { &vop_rmdir_desc, vn_fifo_bypass }, /* rmdir */ |
| 979 | { &vop_symlink_desc, vn_fifo_bypass }, /* symlink */ |
| 980 | { &vop_readdir_desc, vn_fifo_bypass }, /* readdir */ |
| 981 | { &vop_readlink_desc, vn_fifo_bypass }, /* readlink */ |
| 982 | { &vop_abortop_desc, vn_fifo_bypass }, /* abortop */ |
| 983 | { &vop_inactive_desc, cd9660_inactive }, /* inactive */ |
| 984 | { &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */ |
| 985 | { &vop_lock_desc, genfs_lock }, /* lock */ |
| 986 | { &vop_unlock_desc, genfs_unlock }, /* unlock */ |
| 987 | { &vop_bmap_desc, vn_fifo_bypass }, /* bmap */ |
| 988 | { &vop_strategy_desc, vn_fifo_bypass }, /* strategy */ |
| 989 | { &vop_print_desc, cd9660_print }, /* print */ |
| 990 | { &vop_islocked_desc, genfs_islocked }, /* islocked */ |
| 991 | { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ |
| 992 | { &vop_advlock_desc, vn_fifo_bypass }, /* advlock */ |
| 993 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
| 994 | { &vop_putpages_desc, vn_fifo_bypass }, /* putpages */ |
| 995 | { NULL, NULL } |
| 996 | }; |
| 997 | const struct vnodeopv_desc cd9660_fifoop_opv_desc = |
| 998 | { &cd9660_fifoop_p, cd9660_fifoop_entries }; |
| 999 | |