filecore_vnops.c revision 1.13.2.1
1 /* $NetBSD: filecore_vnops.c,v 1.13.2.1 2005/10/20 05:17:29 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * filecore_vnops.c 1.2 1998/8/18 32 */ 33 34 /*- 35 * Copyright (c) 1998 Andrew McMurry 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * filecore_vnops.c 1.2 1998/8/18 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: filecore_vnops.c,v 1.13.2.1 2005/10/20 05:17:29 yamt Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/namei.h> 74 #include <sys/resourcevar.h> 75 #include <sys/kernel.h> 76 #include <sys/file.h> 77 #include <sys/stat.h> 78 #include <sys/buf.h> 79 #include <sys/proc.h> 80 #include <sys/conf.h> 81 #include <sys/mount.h> 82 #include <sys/vnode.h> 83 #include <sys/malloc.h> 84 #include <sys/dirent.h> 85 86 #include <miscfs/genfs/genfs.h> 87 #include <miscfs/specfs/specdev.h> 88 89 #include <fs/filecorefs/filecore.h> 90 #include <fs/filecorefs/filecore_extern.h> 91 #include <fs/filecorefs/filecore_node.h> 92 93 /* 94 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 95 * The mode is shifted to select the owner/group/other fields. The 96 * super user is granted all permissions. 97 */ 98 int 99 filecore_access(v) 100 void *v; 101 { 102 struct vop_access_args /* { 103 struct vnode *a_vp; 104 int a_mode; 105 struct ucred *a_cred; 106 struct proc *a_p; 107 } */ *ap = v; 108 struct vnode *vp = ap->a_vp; 109 struct filecore_node *ip = VTOI(vp); 110 struct filecore_mnt *fcmp = ip->i_mnt; 111 112 /* 113 * Disallow write attempts unless the file is a socket, 114 * fifo, or a block or character device resident on the 115 * file system. 116 */ 117 if (ap->a_mode & VWRITE) { 118 switch (vp->v_type) { 119 case VDIR: 120 case VLNK: 121 case VREG: 122 return (EROFS); 123 default: 124 break; 125 } 126 } 127 128 return (vaccess(vp->v_type, filecore_mode(ip), 129 fcmp->fc_uid, fcmp->fc_gid, ap->a_mode, ap->a_cred)); 130 } 131 132 int 133 filecore_getattr(v) 134 void *v; 135 { 136 struct vop_getattr_args /* { 137 struct vnode *a_vp; 138 struct vattr *a_vap; 139 struct ucred *a_cred; 140 struct proc *a_p; 141 } */ *ap = v; 142 struct vnode *vp = ap->a_vp; 143 struct filecore_node *ip = VTOI(vp); 144 struct vattr *vap = ap->a_vap; 145 struct filecore_mnt *fcmp = ip->i_mnt; 146 147 vap->va_fsid = ip->i_dev; 148 vap->va_fileid = ip->i_number; 149 150 vap->va_mode = filecore_mode(ip); 151 vap->va_nlink = 1; 152 vap->va_uid = fcmp->fc_uid; 153 vap->va_gid = fcmp->fc_gid; 154 vap->va_atime = filecore_time(ip); 155 vap->va_mtime = filecore_time(ip); 156 vap->va_ctime = filecore_time(ip); 157 vap->va_rdev = 0; /* We don't support specials */ 158 159 vap->va_size = (u_quad_t) ip->i_size; 160 vap->va_flags = 0; 161 vap->va_gen = 1; 162 vap->va_blocksize = fcmp->blksize; 163 vap->va_bytes = vap->va_size; 164 vap->va_type = vp->v_type; 165 return (0); 166 } 167 168 /* 169 * Vnode op for reading. 170 */ 171 int 172 filecore_read(v) 173 void *v; 174 { 175 struct vop_read_args /* { 176 struct vnode *a_vp; 177 struct uio *a_uio; 178 int a_ioflag; 179 struct ucred *a_cred; 180 } */ *ap = v; 181 struct vnode *vp = ap->a_vp; 182 struct uio *uio = ap->a_uio; 183 struct filecore_node *ip = VTOI(vp); 184 struct filecore_mnt *fcmp; 185 struct buf *bp; 186 daddr_t lbn, rablock; 187 off_t diff; 188 int error = 0; 189 long size, n, on; 190 191 if (uio->uio_resid == 0) 192 return (0); 193 if (uio->uio_offset < 0) 194 return (EINVAL); 195 if (uio->uio_offset >= ip->i_size) 196 return (0); 197 ip->i_flag |= IN_ACCESS; 198 fcmp = ip->i_mnt; 199 200 if (vp->v_type == VREG) { 201 error = 0; 202 while (uio->uio_resid > 0) { 203 void *win; 204 int flags; 205 vsize_t bytelen = MIN(ip->i_size - uio->uio_offset, 206 uio->uio_resid); 207 208 if (bytelen == 0) { 209 break; 210 } 211 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 212 &bytelen, UBC_READ); 213 error = uiomove(win, bytelen, uio); 214 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 215 ubc_release(win, flags); 216 if (error) { 217 break; 218 } 219 } 220 goto out; 221 } 222 223 do { 224 lbn = lblkno(fcmp, uio->uio_offset); 225 on = blkoff(fcmp, uio->uio_offset); 226 n = MIN(blksize(fcmp, ip, lbn) - on, uio->uio_resid); 227 diff = (off_t)ip->i_size - uio->uio_offset; 228 if (diff <= 0) 229 return (0); 230 if (diff < n) 231 n = diff; 232 size = blksize(fcmp, ip, lbn); 233 rablock = lbn + 1; 234 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) { 235 error = filecore_dbread(ip, &bp); 236 on = uio->uio_offset; 237 n = MIN(FILECORE_DIR_SIZE - on, uio->uio_resid); 238 size = FILECORE_DIR_SIZE; 239 } else { 240 error = bread(vp, lbn, size, NOCRED, &bp); 241 #ifdef FILECORE_DEBUG_BR 242 printf("bread(%p, %x, %ld, CRED, %p)=%d\n", 243 vp, lbn, size, bp, error); 244 #endif 245 } 246 n = MIN(n, size - bp->b_resid); 247 if (error) { 248 #ifdef FILECORE_DEBUG_BR 249 printf("brelse(%p) vn1\n", bp); 250 #endif 251 brelse(bp); 252 return (error); 253 } 254 255 error = uiomove(bp->b_data + on, (int)n, uio); 256 #ifdef FILECORE_DEBUG_BR 257 printf("brelse(%p) vn2\n", bp); 258 #endif 259 brelse(bp); 260 } while (error == 0 && uio->uio_resid > 0 && n != 0); 261 262 out: 263 return (error); 264 } 265 266 /* 267 * Vnode op for readdir 268 */ 269 int 270 filecore_readdir(v) 271 void *v; 272 { 273 struct vop_readdir_args /* { 274 struct vnode *a_vp; 275 struct uio *a_uio; 276 struct ucred *a_cred; 277 int *a_eofflag; 278 off_t **a_cookies; 279 int *a_ncookies; 280 } */ *ap = v; 281 struct uio *uio = ap->a_uio; 282 struct vnode *vdp = ap->a_vp; 283 struct filecore_node *dp; 284 struct filecore_mnt *fcmp; 285 struct buf *bp = NULL; 286 struct dirent de; 287 struct filecore_direntry *dep = NULL; 288 int error = 0; 289 off_t *cookies = NULL; 290 int ncookies = 0; 291 int i; 292 off_t uiooff; 293 294 dp = VTOI(vdp); 295 296 if ((dp->i_dirent.attr & FILECORE_ATTR_DIR) == 0) 297 return (ENOTDIR); 298 299 if (uio->uio_offset % FILECORE_DIRENT_SIZE != 0) 300 return (EINVAL); 301 i = uio->uio_offset / FILECORE_DIRENT_SIZE; 302 uiooff = uio->uio_offset; 303 304 *ap->a_eofflag = 0; 305 fcmp = dp->i_mnt; 306 307 error = filecore_dbread(dp, &bp); 308 if (error) { 309 brelse(bp); 310 return error; 311 } 312 313 if (ap->a_ncookies == NULL) 314 cookies = NULL; 315 else { 316 *ap->a_ncookies = 0; 317 ncookies = uio->uio_resid/16; 318 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 319 } 320 321 for (; ; i++) { 322 switch (i) { 323 case 0: 324 /* Fake the '.' entry */ 325 de.d_fileno = dp->i_number; 326 de.d_type = DT_DIR; 327 de.d_namlen = 1; 328 strlcpy(de.d_name, ".", sizeof(de.d_name)); 329 break; 330 case 1: 331 /* Fake the '..' entry */ 332 de.d_fileno = filecore_getparent(dp); 333 de.d_type = DT_DIR; 334 de.d_namlen = 2; 335 strlcpy(de.d_name, "..", sizeof(de.d_name)); 336 break; 337 default: 338 de.d_fileno = dp->i_dirent.addr + 339 ((i - 2) << FILECORE_INO_INDEX); 340 dep = fcdirentry(bp->b_data, i - 2); 341 if (dep->attr & FILECORE_ATTR_DIR) 342 de.d_type = DT_DIR; 343 else 344 de.d_type = DT_REG; 345 if (filecore_fn2unix(dep->name, de.d_name, 346 /*###346 [cc] warning: passing arg 3 of `filecore_fn2unix' from incompatible pointer type%%%*/ 347 &de.d_namlen)) { 348 *ap->a_eofflag = 1; 349 goto out; 350 } 351 break; 352 } 353 de.d_reclen = _DIRENT_SIZE(&de); 354 if (uio->uio_resid < de.d_reclen) 355 goto out; 356 error = uiomove(&de, de.d_reclen, uio); 357 if (error) 358 goto out; 359 uiooff += FILECORE_DIRENT_SIZE; 360 361 if (cookies) { 362 *cookies++ = i*FILECORE_DIRENT_SIZE; 363 (*ap->a_ncookies)++; 364 if (--ncookies == 0) goto out; 365 } 366 } 367 out: 368 if (cookies) { 369 *ap->a_cookies = cookies; 370 if (error) { 371 free(cookies, M_TEMP); 372 *ap->a_ncookies = 0; 373 *ap->a_cookies = NULL; 374 } 375 } 376 uio->uio_offset = uiooff; 377 378 #ifdef FILECORE_DEBUG_BR 379 printf("brelse(%p) vn3\n", bp); 380 #endif 381 brelse (bp); 382 383 return (error); 384 } 385 386 /* 387 * Return target name of a symbolic link 388 * Shouldn't we get the parent vnode and read the data from there? 389 * This could eventually result in deadlocks in filecore_lookup. 390 * But otherwise the block read here is in the block buffer two times. 391 */ 392 int 393 filecore_readlink(v) 394 void *v; 395 { 396 #if 0 397 struct vop_readlink_args /* { 398 struct vnode *a_vp; 399 struct uio *a_uio; 400 struct ucred *a_cred; 401 } */ *ap = v; 402 #endif 403 404 return (EINVAL); 405 } 406 407 int 408 filecore_link(v) 409 void *v; 410 { 411 struct vop_link_args /* { 412 struct vnode *a_dvp; 413 struct vnode *a_vp; 414 struct componentname *a_cnp; 415 } */ *ap = v; 416 417 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 418 vput(ap->a_dvp); 419 return (EROFS); 420 } 421 422 int 423 filecore_symlink(v) 424 void *v; 425 { 426 struct vop_symlink_args /* { 427 struct vnode *a_dvp; 428 struct vnode **a_vpp; 429 struct componentname *a_cnp; 430 struct vattr *a_vap; 431 char *a_target; 432 } */ *ap = v; 433 434 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 435 vput(ap->a_dvp); 436 return (EROFS); 437 } 438 439 /* 440 * Calculate the logical to physical mapping if not done already, 441 * then call the device strategy routine. 442 */ 443 int 444 filecore_strategy(v) 445 void *v; 446 { 447 struct vop_strategy_args /* { 448 struct vnode *a_vp; 449 struct buf *a_bp; 450 } */ *ap = v; 451 struct buf *bp = ap->a_bp; 452 struct vnode *vp = ap->a_vp; 453 struct filecore_node *ip; 454 int error; 455 456 ip = VTOI(vp); 457 if (bp->b_blkno == bp->b_lblkno) { 458 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 459 if (error) { 460 bp->b_error = error; 461 bp->b_flags |= B_ERROR; 462 biodone(bp); 463 return (error); 464 } 465 if ((long)bp->b_blkno == -1) 466 clrbuf(bp); 467 } 468 if ((long)bp->b_blkno == -1) { 469 biodone(bp); 470 return (0); 471 } 472 vp = ip->i_devvp; 473 return (VOP_STRATEGY(vp, bp)); 474 } 475 476 /* 477 * Print out the contents of an inode. 478 */ 479 /*ARGSUSED*/ 480 int 481 filecore_print(v) 482 void *v; 483 { 484 485 printf("tag VT_FILECORE, filecore vnode\n"); 486 return (0); 487 } 488 489 /* 490 * Return POSIX pathconf information applicable to filecore filesystems. 491 */ 492 int 493 filecore_pathconf(v) 494 void *v; 495 { 496 struct vop_pathconf_args /* { 497 struct vnode *a_vp; 498 int a_name; 499 register_t *a_retval; 500 } */ *ap = v; 501 switch (ap->a_name) { 502 case _PC_LINK_MAX: 503 *ap->a_retval = 1; 504 return (0); 505 case _PC_NAME_MAX: 506 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 507 return (0); 508 case _PC_PATH_MAX: 509 *ap->a_retval = 256; 510 return (0); 511 case _PC_CHOWN_RESTRICTED: 512 *ap->a_retval = 1; 513 return (0); 514 case _PC_NO_TRUNC: 515 *ap->a_retval = 1; 516 return (0); 517 case _PC_SYNC_IO: 518 *ap->a_retval = 1; 519 return (0); 520 case _PC_FILESIZEBITS: 521 *ap->a_retval = 32; 522 return (0); 523 default: 524 return (EINVAL); 525 } 526 /* NOTREACHED */ 527 } 528 529 /* 530 * Global vfs data structures for isofs 531 */ 532 #define filecore_create genfs_eopnotsupp 533 #define filecore_mknod genfs_eopnotsupp 534 #define filecore_write genfs_eopnotsupp 535 #define filecore_setattr genfs_eopnotsupp 536 #define filecore_lease_check genfs_lease_check 537 #define filecore_fcntl genfs_fcntl 538 #define filecore_ioctl genfs_enoioctl 539 #define filecore_fsync genfs_nullop 540 #define filecore_remove genfs_eopnotsupp 541 #define filecore_rename genfs_eopnotsupp 542 #define filecore_mkdir genfs_eopnotsupp 543 #define filecore_rmdir genfs_eopnotsupp 544 #define filecore_advlock genfs_eopnotsupp 545 #define filecore_bwrite genfs_eopnotsupp 546 #define filecore_revoke genfs_revoke 547 548 /* 549 * Global vfs data structures for filecore 550 */ 551 int (**filecore_vnodeop_p) __P((void *)); 552 const struct vnodeopv_entry_desc filecore_vnodeop_entries[] = { 553 { &vop_default_desc, vn_default_error }, 554 { &vop_lookup_desc, filecore_lookup }, /* lookup */ 555 { &vop_create_desc, filecore_create }, /* create */ 556 { &vop_mknod_desc, filecore_mknod }, /* mknod */ 557 { &vop_open_desc, filecore_open }, /* open */ 558 { &vop_close_desc, filecore_close }, /* close */ 559 { &vop_access_desc, filecore_access }, /* access */ 560 { &vop_getattr_desc, filecore_getattr }, /* getattr */ 561 { &vop_setattr_desc, filecore_setattr }, /* setattr */ 562 { &vop_read_desc, filecore_read }, /* read */ 563 { &vop_write_desc, filecore_write }, /* write */ 564 { &vop_lease_desc, filecore_lease_check }, /* lease */ 565 { &vop_fcntl_desc, filecore_fcntl }, /* fcntl */ 566 { &vop_ioctl_desc, filecore_ioctl }, /* ioctl */ 567 { &vop_poll_desc, filecore_poll }, /* poll */ 568 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 569 { &vop_revoke_desc, filecore_revoke }, /* revoke */ 570 { &vop_mmap_desc, filecore_mmap }, /* mmap */ 571 { &vop_fsync_desc, filecore_fsync }, /* fsync */ 572 { &vop_seek_desc, filecore_seek }, /* seek */ 573 { &vop_remove_desc, filecore_remove }, /* remove */ 574 { &vop_link_desc, filecore_link }, /* link */ 575 { &vop_rename_desc, filecore_rename }, /* rename */ 576 { &vop_mkdir_desc, filecore_mkdir }, /* mkdir */ 577 { &vop_rmdir_desc, filecore_rmdir }, /* rmdir */ 578 { &vop_symlink_desc, filecore_symlink }, /* symlink */ 579 { &vop_readdir_desc, filecore_readdir }, /* readdir */ 580 { &vop_readlink_desc, filecore_readlink }, /* readlink */ 581 { &vop_abortop_desc, filecore_abortop }, /* abortop */ 582 { &vop_inactive_desc, filecore_inactive }, /* inactive */ 583 { &vop_reclaim_desc, filecore_reclaim }, /* reclaim */ 584 { &vop_lock_desc, genfs_lock }, /* lock */ 585 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 586 { &vop_bmap_desc, filecore_bmap }, /* bmap */ 587 { &vop_strategy_desc, filecore_strategy }, /* strategy */ 588 { &vop_print_desc, filecore_print }, /* print */ 589 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 590 { &vop_pathconf_desc, filecore_pathconf }, /* pathconf */ 591 { &vop_advlock_desc, filecore_advlock }, /* advlock */ 592 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 593 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 594 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 595 { NULL, NULL } 596 }; 597 const struct vnodeopv_desc filecore_vnodeop_opv_desc = 598 { &filecore_vnodeop_p, filecore_vnodeop_entries }; 599
Indexes created Wed Oct 15 03:09:54 GMT 2025