| 1 | /* |
| 2 | * $Id: isofs_vnops.c,v 1.3 1993/11/25 01:32:31 wollman Exp $ |
| 3 | */ |
| 4 | #include "param.h" |
| 5 | #include "systm.h" |
| 6 | #include "namei.h" |
| 7 | #include "resourcevar.h" |
| 8 | #include "kernel.h" |
| 9 | #include "file.h" |
| 10 | #include "stat.h" |
| 11 | #include "buf.h" |
| 12 | #include "proc.h" |
| 13 | #include "conf.h" |
| 14 | #include "mount.h" |
| 15 | #include "vnode.h" |
| 16 | #include "specdev.h" |
| 17 | #include "fifo.h" |
| 18 | #include "malloc.h" |
| 19 | #include "dir.h" |
| 20 | |
| 21 | #include "iso.h" |
| 22 | #include "isofs_node.h" |
| 23 | #include "iso_rrip.h" |
| 24 | |
| 25 | /* |
| 26 | * Open called. |
| 27 | * |
| 28 | * Nothing to do. |
| 29 | */ |
| 30 | /* ARGSUSED */ |
| 31 | int |
| 32 | isofs_open(vp, mode, cred, p) |
| 33 | struct vnode *vp; |
| 34 | int mode; |
| 35 | struct ucred *cred; |
| 36 | struct proc *p; |
| 37 | { |
| 38 | return (0); |
| 39 | } |
| 40 | |
| 41 | /* |
| 42 | * Close called |
| 43 | * |
| 44 | * Update the times on the inode on writeable file systems. |
| 45 | */ |
| 46 | /* ARGSUSED */ |
| 47 | int |
| 48 | isofs_close(vp, fflag, cred, p) |
| 49 | struct vnode *vp; |
| 50 | int fflag; |
| 51 | struct ucred *cred; |
| 52 | struct proc *p; |
| 53 | { |
| 54 | return (0); |
| 55 | } |
| 56 | |
| 57 | /* |
| 58 | * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. |
| 59 | * The mode is shifted to select the owner/group/other fields. The |
| 60 | * super user is granted all permissions. |
| 61 | */ |
| 62 | int |
| 63 | isofs_access(vp, mode, cred, p) |
| 64 | struct vnode *vp; |
| 65 | register int mode; |
| 66 | struct ucred *cred; |
| 67 | struct proc *p; |
| 68 | { |
| 69 | return (0); |
| 70 | } |
| 71 | |
| 72 | /* ARGSUSED */ |
| 73 | int |
| 74 | isofs_getattr(vp, vap, cred, p) |
| 75 | struct vnode *vp; |
| 76 | register struct vattr *vap; |
| 77 | struct ucred *cred; |
| 78 | struct proc *p; |
| 79 | { |
| 80 | register struct iso_node *ip = VTOI(vp); |
| 81 | int i; |
| 82 | |
| 83 | vap->va_fsid = ip->i_dev; |
| 84 | vap->va_fileid = ip->i_number; |
| 85 | if (vp->v_type == VDIR) |
| 86 | vap->va_nlink = 2; |
| 87 | else |
| 88 | vap->va_nlink = 1; |
| 89 | |
| 90 | vap->va_mode = ip->inode.iso_mode; |
| 91 | vap->va_uid = ip->inode.iso_uid; |
| 92 | vap->va_gid = ip->inode.iso_gid; |
| 93 | vap->va_atime= ip->inode.iso_atime; |
| 94 | vap->va_mtime= ip->inode.iso_mtime; |
| 95 | vap->va_ctime= ip->inode.iso_ctime; |
| 96 | |
| 97 | vap->va_rdev = 0; |
| 98 | vap->va_size = ip->i_size; |
| 99 | vap->va_size_rsv = 0; |
| 100 | vap->va_flags = 0; |
| 101 | vap->va_gen = 1; |
| 102 | vap->va_blocksize = ip->i_mnt->logical_block_size; |
| 103 | vap->va_bytes = ip->i_size; |
| 104 | vap->va_bytes_rsv = 0; |
| 105 | vap->va_type = vp->v_type; |
| 106 | return (0); |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * Vnode op for reading. |
| 111 | */ |
| 112 | /* ARGSUSED */ |
| 113 | int |
| 114 | isofs_read(vp, uio, ioflag, cred) |
| 115 | struct vnode *vp; |
| 116 | register struct uio *uio; |
| 117 | int ioflag; |
| 118 | struct ucred *cred; |
| 119 | { |
| 120 | register struct iso_node *ip = VTOI(vp); |
| 121 | register struct iso_mnt *imp; |
| 122 | struct buf *bp; |
| 123 | daddr_t lbn, bn, rablock; |
| 124 | int size, diff, error = 0; |
| 125 | long n, on, type; |
| 126 | |
| 127 | #ifdef DIAGNOSTICx |
| 128 | if (uio->uio_rw != UIO_READ) |
| 129 | panic("isofs_read mode"); |
| 130 | type = ip->i_mode & IFMT; |
| 131 | if (type != IFDIR && type != IFREG && type != IFLNK) |
| 132 | panic("isofs_read type"); |
| 133 | #endif |
| 134 | if (uio->uio_resid == 0) |
| 135 | return (0); |
| 136 | if (uio->uio_offset < 0) |
| 137 | return (EINVAL); |
| 138 | ip->i_flag |= IACC; |
| 139 | imp = ip->i_mnt; |
| 140 | do { |
| 141 | lbn = iso_lblkno(imp, uio->uio_offset); |
| 142 | on = iso_blkoff(imp, uio->uio_offset); |
| 143 | n = MIN((unsigned)(imp->im_bsize - on), uio->uio_resid); |
| 144 | diff = ip->i_size - uio->uio_offset; |
| 145 | if (diff <= 0) |
| 146 | return (0); |
| 147 | if (diff < n) |
| 148 | n = diff; |
| 149 | size = iso_blksize(imp, ip, lbn); |
| 150 | rablock = lbn + 1; |
| 151 | if (vp->v_lastr + 1 == lbn && |
| 152 | iso_lblktosize(imp, rablock) < ip->i_size) |
| 153 | error = breada(ITOV(ip), lbn, size, rablock, |
| 154 | iso_blksize(imp, ip, rablock), NOCRED, &bp); |
| 155 | else |
| 156 | error = bread(ITOV(ip), lbn, size, NOCRED, &bp); |
| 157 | vp->v_lastr = lbn; |
| 158 | n = MIN(n, size - bp->b_resid); |
| 159 | if (error) { |
| 160 | brelse(bp); |
| 161 | return (error); |
| 162 | } |
| 163 | |
| 164 | error = uiomove(bp->b_un.b_addr + on, (int)n, uio); |
| 165 | if (n + on == imp->im_bsize || uio->uio_offset == ip->i_size) |
| 166 | bp->b_flags |= B_AGE; |
| 167 | brelse(bp); |
| 168 | } while (error == 0 && uio->uio_resid > 0 && n != 0); |
| 169 | return (error); |
| 170 | } |
| 171 | |
| 172 | /* ARGSUSED */ |
| 173 | int |
| 174 | isofs_ioctl(vp, com, data, fflag, cred, p) |
| 175 | struct vnode *vp; |
| 176 | int com; |
| 177 | caddr_t data; |
| 178 | int fflag; |
| 179 | struct ucred *cred; |
| 180 | struct proc *p; |
| 181 | { |
| 182 | return (ENOTTY); |
| 183 | } |
| 184 | |
| 185 | /* ARGSUSED */ |
| 186 | int |
| 187 | isofs_select(vp, which, fflags, cred, p) |
| 188 | struct vnode *vp; |
| 189 | int which, fflags; |
| 190 | struct ucred *cred; |
| 191 | struct proc *p; |
| 192 | { |
| 193 | |
| 194 | /* |
| 195 | * We should really check to see if I/O is possible. |
| 196 | */ |
| 197 | return (1); |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Mmap a file |
| 202 | * |
| 203 | * NB Currently unsupported. |
| 204 | */ |
| 205 | /* ARGSUSED */ |
| 206 | int |
| 207 | isofs_mmap(vp, fflags, cred, p) |
| 208 | struct vnode *vp; |
| 209 | int fflags; |
| 210 | struct ucred *cred; |
| 211 | struct proc *p; |
| 212 | { |
| 213 | |
| 214 | return (EINVAL); |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * Seek on a file |
| 219 | * |
| 220 | * Nothing to do, so just return. |
| 221 | */ |
| 222 | /* ARGSUSED */ |
| 223 | int |
| 224 | isofs_seek(vp, oldoff, newoff, cred) |
| 225 | struct vnode *vp; |
| 226 | off_t oldoff, newoff; |
| 227 | struct ucred *cred; |
| 228 | { |
| 229 | |
| 230 | return (0); |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * Vnode op for readdir |
| 235 | */ |
| 236 | int |
| 237 | isofs_readdir(vp, uio, cred, eofflagp) |
| 238 | struct vnode *vp; |
| 239 | register struct uio *uio; |
| 240 | struct ucred *cred; |
| 241 | int *eofflagp; |
| 242 | { |
| 243 | struct dirent dirent; |
| 244 | int iso_offset; |
| 245 | int entryoffsetinblock; |
| 246 | int error = 0; |
| 247 | int endsearch; |
| 248 | struct iso_directory_record *ep; |
| 249 | int reclen; |
| 250 | struct iso_mnt *imp; |
| 251 | struct iso_node *ip; |
| 252 | struct buf *bp = NULL; |
| 253 | int i; |
| 254 | int end_flag = 0; |
| 255 | ISO_RRIP_ANALYZE ana; |
| 256 | |
| 257 | ip = VTOI (vp); |
| 258 | imp = ip->i_mnt; |
| 259 | |
| 260 | iso_offset = uio->uio_offset; |
| 261 | |
| 262 | entryoffsetinblock = iso_blkoff(imp, iso_offset); |
| 263 | if (entryoffsetinblock != 0) { |
| 264 | if (error = iso_blkatoff(ip, iso_offset, (char **)0, &bp)) |
| 265 | return (error); |
| 266 | } |
| 267 | |
| 268 | endsearch = ip->i_size; |
| 269 | |
| 270 | while (iso_offset < endsearch && uio->uio_resid > 0) { |
| 271 | /* |
| 272 | * If offset is on a block boundary, |
| 273 | * read the next directory block. |
| 274 | * Release previous if it exists. |
| 275 | */ |
| 276 | |
| 277 | if (iso_blkoff(imp, iso_offset) == 0) { |
| 278 | if (bp != NULL) |
| 279 | brelse(bp); |
| 280 | if (error = iso_blkatoff(ip, iso_offset, |
| 281 | (char **)0, &bp)) |
| 282 | return (error); |
| 283 | entryoffsetinblock = 0; |
| 284 | } |
| 285 | /* |
| 286 | * Get pointer to next entry. |
| 287 | */ |
| 288 | |
| 289 | ep = (struct iso_directory_record *) |
| 290 | (bp->b_un.b_addr + entryoffsetinblock); |
| 291 | |
| 292 | reclen = isonum_711 (ep->length); |
| 293 | if (reclen == 0) { |
| 294 | /* skip to next block, if any */ |
| 295 | iso_offset = roundup (iso_offset, |
| 296 | imp->logical_block_size); |
| 297 | continue; |
| 298 | } |
| 299 | |
| 300 | if (reclen < sizeof (struct iso_directory_record)) |
| 301 | /* illegal entry, stop */ |
| 302 | break; |
| 303 | |
| 304 | /* 10 Aug 92*/ if (entryoffsetinblock + reclen -1 >= imp->logical_block_size) |
| 305 | /* illegal directory, so stop looking */ |
| 306 | break; |
| 307 | |
| 308 | dirent.d_fileno = isonum_733 (ep->extent); |
| 309 | dirent.d_namlen = isonum_711 (ep->name_len); |
| 310 | |
| 311 | if (reclen < sizeof (struct iso_directory_record) |
| 312 | + dirent.d_namlen) |
| 313 | /* illegal entry, stop */ |
| 314 | break; |
| 315 | |
| 316 | /* |
| 317 | * |
| 318 | */ |
| 319 | switch (ep->name[0]) { |
| 320 | case 0: |
| 321 | dirent.d_name[0] = '.'; |
| 322 | dirent.d_namlen = 1; |
| 323 | break; |
| 324 | case 1: |
| 325 | dirent.d_name[0] = '.'; |
| 326 | dirent.d_name[1] = '.'; |
| 327 | dirent.d_namlen = 2; |
| 328 | break; |
| 329 | default: |
| 330 | switch ( imp->iso_ftype ) { |
| 331 | case ISO_FTYPE_RRIP: |
| 332 | isofs_rrip_getname( ep, dirent.d_name, &dirent.d_namlen ); |
| 333 | break; |
| 334 | case ISO_FTYPE_9660: |
| 335 | { |
| 336 | int namelen = dirent.d_namlen; |
| 337 | isofntrans(ep->name, dirent.d_namlen, |
| 338 | dirent.d_name, &namelen); |
| 339 | dirent.d_namlen = namelen; |
| 340 | break; |
| 341 | } |
| 342 | default: |
| 343 | break; |
| 344 | } |
| 345 | break; |
| 346 | } |
| 347 | |
| 348 | dirent.d_name[dirent.d_namlen] = 0; |
| 349 | dirent.d_reclen = DIRSIZ (&dirent); |
| 350 | |
| 351 | if (uio->uio_resid < dirent.d_reclen) |
| 352 | break; |
| 353 | |
| 354 | if (error = uiomove (&dirent, dirent.d_reclen, uio)) |
| 355 | break; |
| 356 | |
| 357 | iso_offset += reclen; |
| 358 | entryoffsetinblock += reclen; |
| 359 | } |
| 360 | |
| 361 | if (bp) |
| 362 | brelse (bp); |
| 363 | |
| 364 | if (end_flag || (VTOI(vp)->i_size - iso_offset) <= 0) |
| 365 | *eofflagp = 1; |
| 366 | else |
| 367 | *eofflagp = 0; |
| 368 | |
| 369 | uio->uio_offset = iso_offset; |
| 370 | |
| 371 | return (error); |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * Return target name of a symbolic link |
| 376 | */ |
| 377 | typedef struct iso_directory_record ISODIR; |
| 378 | typedef struct iso_node ISONODE; |
| 379 | typedef struct iso_mnt ISOMNT; |
| 380 | int isofs_readlink(vp, uio, cred) |
| 381 | struct vnode *vp; |
| 382 | struct uio *uio; |
| 383 | struct ucred *cred; |
| 384 | { |
| 385 | ISONODE *ip; |
| 386 | ISODIR *dirp; |
| 387 | ISOMNT *imp; |
| 388 | struct buf *bp; |
| 389 | int symlen; |
| 390 | int error; |
| 391 | char symname[NAME_MAX]; |
| 392 | |
| 393 | ip = VTOI( vp ); |
| 394 | imp = ip->i_mnt; |
| 395 | /* |
| 396 | * Get parents directory record block that this inode included. |
| 397 | */ |
| 398 | error = bread( imp->im_devvp, |
| 399 | (daddr_t)(( ip->iso_parent_ext + (ip->iso_parent >> 11 ) ) |
| 400 | * imp->im_bsize / DEV_BSIZE ), |
| 401 | imp->im_bsize, |
| 402 | NOCRED, |
| 403 | &bp ); |
| 404 | if ( error ) { |
| 405 | return( EINVAL ); |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * Setup the directory pointer for this inode |
| 410 | */ |
| 411 | |
| 412 | dirp = (ISODIR *)(bp->b_un.b_addr + ( ip->iso_parent & 0x7ff ) ); |
| 413 | #ifdef DEBUG |
| 414 | printf("lbn=%d[base=%d,off=%d,bsize=%d,DEV_BSIZE=%d], dirp= %08x, b_addr=%08x, offset=%08x(%08x)\n", |
| 415 | (daddr_t)(( ip->iso_parent_ext + (ip->iso_parent >> 12 ) ) * imp->im_bsize / DEV_BSIZE ), |
| 416 | ip->iso_parent_ext, |
| 417 | (ip->iso_parent >> 11 ), |
| 418 | imp->im_bsize, |
| 419 | DEV_BSIZE, |
| 420 | dirp, |
| 421 | bp->b_un.b_addr, |
| 422 | ip->iso_parent, |
| 423 | ip->iso_parent & 0x7ff ); |
| 424 | #endif |
| 425 | |
| 426 | /* |
| 427 | * Just make sure, we have a right one.... |
| 428 | * 1: Check not cross boundary on block |
| 429 | * 2: Check number of inode |
| 430 | */ |
| 431 | if ( (ip->iso_parent & 0x7ff) + isonum_711( dirp->length ) >= |
| 432 | imp->im_bsize ) { |
| 433 | brelse ( bp ); |
| 434 | return( EINVAL ); |
| 435 | } |
| 436 | if ( isonum_733(dirp->extent) != ip->i_number ) { |
| 437 | brelse ( bp ); |
| 438 | return( EINVAL ); |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * Ok, we just gathering a Symbolick name in SL record. |
| 443 | */ |
| 444 | if ( isofs_rrip_getsymname( vp, dirp, symname, &symlen ) == 0 ) { |
| 445 | brelse ( bp ); |
| 446 | return( EINVAL ); |
| 447 | } |
| 448 | /* |
| 449 | * Don't forget before you leave from home ;-) |
| 450 | */ |
| 451 | brelse( bp ); |
| 452 | |
| 453 | /* |
| 454 | * return with the Symbolick name to caller's. |
| 455 | */ |
| 456 | return ( uiomove( symname, symlen, uio ) ); |
| 457 | } |
| 458 | |
| 459 | /* |
| 460 | * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually |
| 461 | * done. If a buffer has been saved in anticipation of a CREATE, delete it. |
| 462 | */ |
| 463 | /* ARGSUSED */ |
| 464 | int |
| 465 | isofs_abortop(ndp) |
| 466 | struct nameidata *ndp; |
| 467 | { |
| 468 | |
| 469 | if ((ndp->ni_nameiop & (HASBUF | SAVESTART)) == HASBUF) |
| 470 | FREE(ndp->ni_pnbuf, M_NAMEI); |
| 471 | return (0); |
| 472 | } |
| 473 | |
| 474 | /* |
| 475 | * Lock an inode. |
| 476 | */ |
| 477 | int |
| 478 | isofs_lock(vp) |
| 479 | struct vnode *vp; |
| 480 | { |
| 481 | register struct iso_node *ip = VTOI(vp); |
| 482 | |
| 483 | ISO_ILOCK(ip); |
| 484 | return (0); |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * Unlock an inode. |
| 489 | */ |
| 490 | int |
| 491 | isofs_unlock(vp) |
| 492 | struct vnode *vp; |
| 493 | { |
| 494 | register struct iso_node *ip = VTOI(vp); |
| 495 | |
| 496 | if (!(ip->i_flag & ILOCKED)) |
| 497 | panic("isofs_unlock NOT LOCKED"); |
| 498 | ISO_IUNLOCK(ip); |
| 499 | return (0); |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * Check for a locked inode. |
| 504 | */ |
| 505 | int |
| 506 | isofs_islocked(vp) |
| 507 | struct vnode *vp; |
| 508 | { |
| 509 | |
| 510 | if (VTOI(vp)->i_flag & ILOCKED) |
| 511 | return (1); |
| 512 | return (0); |
| 513 | } |
| 514 | |
| 515 | /* |
| 516 | * Calculate the logical to physical mapping if not done already, |
| 517 | * then call the device strategy routine. |
| 518 | */ |
| 519 | |
| 520 | int |
| 521 | isofs_strategy(bp) |
| 522 | register struct buf *bp; |
| 523 | { |
| 524 | register struct iso_node *ip = VTOI(bp->b_vp); |
| 525 | struct vnode *vp; |
| 526 | int error; |
| 527 | |
| 528 | if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) |
| 529 | panic("isofs_strategy: spec"); |
| 530 | if (bp->b_blkno == bp->b_lblkno) { |
| 531 | if (error = iso_bmap(ip, bp->b_lblkno, &bp->b_blkno)) |
| 532 | return (error); |
| 533 | if ((long)bp->b_blkno == -1) |
| 534 | clrbuf(bp); |
| 535 | } |
| 536 | if ((long)bp->b_blkno == -1) { |
| 537 | biodone(bp); |
| 538 | return (0); |
| 539 | } |
| 540 | vp = ip->i_devvp; |
| 541 | bp->b_dev = vp->v_rdev; |
| 542 | (*(vp->v_op->vop_strategy))(bp); |
| 543 | return (0); |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * Print out the contents of an inode. |
| 548 | */ |
| 549 | void |
| 550 | isofs_print(vp) |
| 551 | struct vnode *vp; |
| 552 | { |
| 553 | printf ("tag VT_ISOFS, isofs vnode\n"); |
| 554 | } |
| 555 | |
| 556 | extern int enodev (); |
| 557 | |
| 558 | /* |
| 559 | * Global vfs data structures for isofs |
| 560 | */ |
| 561 | struct vnodeops isofs_vnodeops = { |
| 562 | isofs_lookup, /* lookup */ |
| 563 | (void *)enodev, /* create */ |
| 564 | (void *)enodev, /* mknod */ |
| 565 | isofs_open, /* open */ |
| 566 | isofs_close, /* close */ |
| 567 | isofs_access, /* access */ |
| 568 | isofs_getattr, /* getattr */ |
| 569 | (void *)enodev, /* setattr */ |
| 570 | isofs_read, /* read */ |
| 571 | (void *)enodev, /* write */ |
| 572 | isofs_ioctl, /* ioctl */ |
| 573 | isofs_select, /* select */ |
| 574 | isofs_mmap, /* mmap */ |
| 575 | (void *)nullop, /* fsync */ |
| 576 | isofs_seek, /* seek */ |
| 577 | (void *)enodev, /* remove */ |
| 578 | (void *)enodev, /* link */ |
| 579 | (void *)enodev, /* rename */ |
| 580 | (void *)enodev, /* mkdir */ |
| 581 | (void *)enodev, /* rmdir */ |
| 582 | (void *)enodev, /* symlink */ |
| 583 | isofs_readdir, /* readdir */ |
| 584 | isofs_readlink, /* readlink */ |
| 585 | isofs_abortop, /* abortop */ |
| 586 | isofs_inactive, /* inactive */ |
| 587 | isofs_reclaim, /* reclaim */ |
| 588 | isofs_lock, /* lock */ |
| 589 | isofs_unlock, /* unlock */ |
| 590 | (void *)enodev, /* bmap */ |
| 591 | isofs_strategy, /* strategy */ |
| 592 | isofs_print, /* print */ |
| 593 | isofs_islocked, /* islocked */ |
| 594 | (void *)enodev, /* advlock */ |
| 595 | }; |