Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/fs/hpfs/hpfs_vnops.c
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1 /*- 2 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org) 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/proc.h> 33 #include <sys/conf.h> 34 #include <sys/time.h> 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/vnode.h> 38 #include <sys/mount.h> 39 #include <sys/namei.h> 40 #include <sys/malloc.h> 41 #include <sys/bio.h> 42 #include <sys/buf.h> 43 #include <sys/dirent.h> 44 45 #include <vm/vm.h> 46 #include <vm/vm_param.h> 47 #include <vm/vm_page.h> 48 #include <vm/vm_object.h> 49 #include <vm/vm_pager.h> 50 #include <vm/vnode_pager.h> 51 #include <vm/vm_extern.h> 52 53 #include <sys/unistd.h> /* for pathconf(2) constants */ 54 55 #include <fs/hpfs/hpfs.h> 56 #include <fs/hpfs/hpfsmount.h> 57 #include <fs/hpfs/hpfs_subr.h> 58 #include <fs/hpfs/hpfs_ioctl.h> 59 60 static int hpfs_de_uiomove(struct hpfsmount *, struct hpfsdirent *, 61 struct uio *); 62 static vop_ioctl_t hpfs_ioctl; 63 static vop_read_t hpfs_read; 64 static vop_write_t hpfs_write; 65 static vop_getattr_t hpfs_getattr; 66 static vop_setattr_t hpfs_setattr; 67 static vop_inactive_t hpfs_inactive; 68 static vop_print_t hpfs_print; 69 static vop_reclaim_t hpfs_reclaim; 70 static vop_strategy_t hpfs_strategy; 71 static vop_access_t hpfs_access; 72 static vop_open_t hpfs_open; 73 static vop_close_t hpfs_close; 74 static vop_readdir_t hpfs_readdir; 75 static vop_cachedlookup_t hpfs_lookup; 76 static vop_create_t hpfs_create; 77 static vop_remove_t hpfs_remove; 78 static vop_bmap_t hpfs_bmap; 79 static vop_fsync_t hpfs_fsync; 80 static vop_pathconf_t hpfs_pathconf; 81 static vop_vptofh_t hpfs_vptofh; 82 83 static int 84 hpfs_fsync(ap) 85 struct vop_fsync_args /* { 86 struct vnode *a_vp; 87 struct ucred *a_cred; 88 int a_waitfor; 89 struct thread *a_td; 90 } */ *ap; 91 { 92 /* 93 * Flush our dirty buffers. 94 */ 95 vop_stdfsync(ap); 96 97 /* 98 * Write out the on-disc version of the vnode. 99 */ 100 return hpfs_update(VTOHP(ap->a_vp)); 101 } 102 103 static int 104 hpfs_ioctl ( 105 struct vop_ioctl_args /* { 106 struct vnode *a_vp; 107 u_long a_command; 108 caddr_t a_data; 109 int a_fflag; 110 struct ucred *a_cred; 111 struct thread *a_td; 112 } */ *ap) 113 { 114 register struct vnode *vp = ap->a_vp; 115 register struct hpfsnode *hp = VTOHP(vp); 116 int error; 117 118 printf("hpfs_ioctl(0x%x, 0x%lx, 0x%p, 0x%x): ", 119 hp->h_no, ap->a_command, ap->a_data, ap->a_fflag); 120 121 switch (ap->a_command) { 122 case HPFSIOCGEANUM: { 123 u_long eanum; 124 u_long passed; 125 struct ea *eap; 126 127 eanum = 0; 128 129 if (hp->h_fn.fn_ealen > 0) { 130 eap = (struct ea *)&(hp->h_fn.fn_int); 131 passed = 0; 132 133 while (passed < hp->h_fn.fn_ealen) { 134 135 printf("EAname: %s\n", EA_NAME(eap)); 136 137 eanum++; 138 passed += sizeof(struct ea) + 139 eap->ea_namelen + 1 + eap->ea_vallen; 140 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 141 passed); 142 } 143 error = 0; 144 } else { 145 error = ENOENT; 146 } 147 148 printf("%lu eas\n", eanum); 149 150 *(u_long *)ap->a_data = eanum; 151 152 break; 153 } 154 case HPFSIOCGEASZ: { 155 u_long eanum; 156 u_long passed; 157 struct ea *eap; 158 159 printf("EA%ld\n", *(u_long *)ap->a_data); 160 161 eanum = 0; 162 if (hp->h_fn.fn_ealen > 0) { 163 eap = (struct ea *)&(hp->h_fn.fn_int); 164 passed = 0; 165 166 error = ENOENT; 167 while (passed < hp->h_fn.fn_ealen) { 168 printf("EAname: %s\n", EA_NAME(eap)); 169 170 if (eanum == *(u_long *)ap->a_data) { 171 *(u_long *)ap->a_data = 172 eap->ea_namelen + 1 + 173 eap->ea_vallen; 174 175 error = 0; 176 break; 177 } 178 179 eanum++; 180 passed += sizeof(struct ea) + 181 eap->ea_namelen + 1 + eap->ea_vallen; 182 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 183 passed); 184 } 185 } else { 186 error = ENOENT; 187 } 188 189 break; 190 } 191 case HPFSIOCRDEA: { 192 u_long eanum; 193 u_long passed; 194 struct hpfs_rdea *rdeap; 195 struct ea *eap; 196 197 rdeap = (struct hpfs_rdea *)ap->a_data; 198 printf("EA%ld\n", rdeap->ea_no); 199 200 eanum = 0; 201 if (hp->h_fn.fn_ealen > 0) { 202 eap = (struct ea *)&(hp->h_fn.fn_int); 203 passed = 0; 204 205 error = ENOENT; 206 while (passed < hp->h_fn.fn_ealen) { 207 printf("EAname: %s\n", EA_NAME(eap)); 208 209 if (eanum == rdeap->ea_no) { 210 rdeap->ea_sz = eap->ea_namelen + 1 + 211 eap->ea_vallen; 212 copyout(EA_NAME(eap),rdeap->ea_data, 213 rdeap->ea_sz); 214 error = 0; 215 break; 216 } 217 218 eanum++; 219 passed += sizeof(struct ea) + 220 eap->ea_namelen + 1 + eap->ea_vallen; 221 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 222 passed); 223 } 224 } else { 225 error = ENOENT; 226 } 227 228 break; 229 } 230 default: 231 error = ENOTTY; 232 break; 233 } 234 return (error); 235 } 236 237 /* 238 * Map file offset to disk offset. 239 */ 240 int 241 hpfs_bmap(ap) 242 struct vop_bmap_args /* { 243 struct vnode *a_vp; 244 daddr_t a_bn; 245 struct bufobj **a_bop; 246 daddr_t *a_bnp; 247 int *a_runp; 248 int *a_runb; 249 } */ *ap; 250 { 251 register struct hpfsnode *hp = VTOHP(ap->a_vp); 252 daddr_t blkno; 253 int error; 254 255 if (ap->a_bop != NULL) 256 *ap->a_bop = &hp->h_devvp->v_bufobj; 257 if (ap->a_runb != NULL) 258 *ap->a_runb = 0; 259 if (ap->a_bnp == NULL) 260 return (0); 261 262 dprintf(("hpfs_bmap(0x%x, 0x%x): ",hp->h_no, ap->a_bn)); 263 264 error = hpfs_hpbmap (hp, ap->a_bn, &blkno, ap->a_runp); 265 *ap->a_bnp = blkno; 266 267 return (error); 268 } 269 270 static int 271 hpfs_read(ap) 272 struct vop_read_args /* { 273 struct vnode *a_vp; 274 struct uio *a_uio; 275 int a_ioflag; 276 struct ucred *a_cred; 277 } */ *ap; 278 { 279 register struct vnode *vp = ap->a_vp; 280 register struct hpfsnode *hp = VTOHP(vp); 281 struct uio *uio = ap->a_uio; 282 struct buf *bp; 283 u_int xfersz, toread; 284 u_int off; 285 daddr_t lbn, bn; 286 int resid; 287 int runl; 288 int error = 0; 289 290 resid = min (uio->uio_resid, hp->h_fn.fn_size - uio->uio_offset); 291 292 dprintf(("hpfs_read(0x%x, off: %d resid: %d, segflg: %d): [resid: 0x%x]\n",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg, resid)); 293 294 while (resid) { 295 lbn = uio->uio_offset >> DEV_BSHIFT; 296 off = uio->uio_offset & (DEV_BSIZE - 1); 297 dprintf(("hpfs_read: resid: 0x%x lbn: 0x%x off: 0x%x\n", 298 uio->uio_resid, lbn, off)); 299 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 300 if (error) 301 return (error); 302 303 toread = min(off + resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 304 xfersz = (toread + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 305 dprintf(("hpfs_read: bn: 0x%x (0x%x) toread: 0x%x (0x%x)\n", 306 bn, runl, toread, xfersz)); 307 308 if (toread == 0) 309 break; 310 311 error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp); 312 if (error) { 313 brelse(bp); 314 break; 315 } 316 317 error = uiomove(bp->b_data + off, toread - off, uio); 318 if(error) { 319 brelse(bp); 320 break; 321 } 322 brelse(bp); 323 resid -= toread; 324 } 325 dprintf(("hpfs_read: successful\n")); 326 return (error); 327 } 328 329 static int 330 hpfs_write(ap) 331 struct vop_write_args /* { 332 struct vnode *a_vp; 333 struct uio *a_uio; 334 int a_ioflag; 335 struct ucred *a_cred; 336 } */ *ap; 337 { 338 register struct vnode *vp = ap->a_vp; 339 register struct hpfsnode *hp = VTOHP(vp); 340 struct uio *uio = ap->a_uio; 341 struct buf *bp; 342 u_int xfersz, towrite; 343 u_int off; 344 daddr_t lbn, bn; 345 int runl; 346 int error = 0; 347 348 dprintf(("hpfs_write(0x%x, off: %d resid: %d, segflg: %d):\n",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg)); 349 350 if (ap->a_ioflag & IO_APPEND) { 351 dprintf(("hpfs_write: APPEND mode\n")); 352 uio->uio_offset = hp->h_fn.fn_size; 353 } 354 if (uio->uio_offset + uio->uio_resid > hp->h_fn.fn_size) { 355 error = hpfs_extend (hp, uio->uio_offset + uio->uio_resid); 356 if (error) { 357 printf("hpfs_write: hpfs_extend FAILED %d\n", error); 358 return (error); 359 } 360 } 361 362 while (uio->uio_resid) { 363 lbn = uio->uio_offset >> DEV_BSHIFT; 364 off = uio->uio_offset & (DEV_BSIZE - 1); 365 dprintf(("hpfs_write: resid: 0x%x lbn: 0x%x off: 0x%x\n", 366 uio->uio_resid, lbn, off)); 367 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 368 if (error) 369 return (error); 370 371 towrite = min(off + uio->uio_resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 372 xfersz = (towrite + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 373 dprintf(("hpfs_write: bn: 0x%x (0x%x) towrite: 0x%x (0x%x)\n", 374 bn, runl, towrite, xfersz)); 375 376 if ((off == 0) && (towrite == xfersz)) { 377 bp = getblk(hp->h_devvp, bn, xfersz, 0, 0, 0); 378 clrbuf(bp); 379 } else { 380 error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp); 381 if (error) { 382 brelse(bp); 383 return (error); 384 } 385 } 386 387 error = uiomove(bp->b_data + off, towrite - off, uio); 388 if(error) { 389 brelse(bp); 390 return (error); 391 } 392 393 if (ap->a_ioflag & IO_SYNC) 394 bwrite(bp); 395 else 396 bawrite(bp); 397 } 398 399 dprintf(("hpfs_write: successful\n")); 400 return (0); 401 } 402 403 /* 404 * XXXXX do we need hpfsnode locking inside? 405 */ 406 static int 407 hpfs_getattr(ap) 408 struct vop_getattr_args /* { 409 struct vnode *a_vp; 410 struct vattr *a_vap; 411 struct ucred *a_cred; 412 struct thread *a_td; 413 } */ *ap; 414 { 415 register struct vnode *vp = ap->a_vp; 416 register struct hpfsnode *hp = VTOHP(vp); 417 register struct vattr *vap = ap->a_vap; 418 int error; 419 420 dprintf(("hpfs_getattr(0x%x):\n", hp->h_no)); 421 422 vap->va_fsid = dev2udev(hp->h_dev); 423 vap->va_fileid = hp->h_no; 424 vap->va_mode = hp->h_mode; 425 vap->va_nlink = 1; 426 vap->va_uid = hp->h_uid; 427 vap->va_gid = hp->h_gid; 428 vap->va_rdev = NODEV; 429 vap->va_size = hp->h_fn.fn_size; 430 vap->va_bytes = ((hp->h_fn.fn_size + DEV_BSIZE-1) & ~(DEV_BSIZE-1)) + 431 DEV_BSIZE; 432 433 if (!(hp->h_flag & H_PARVALID)) { 434 error = hpfs_validateparent(hp); 435 if (error) 436 return (error); 437 } 438 vap->va_atime = hpfstimetounix(hp->h_atime); 439 vap->va_mtime = hpfstimetounix(hp->h_mtime); 440 vap->va_ctime = hpfstimetounix(hp->h_ctime); 441 442 vap->va_flags = 0; 443 vap->va_gen = 0; 444 vap->va_blocksize = DEV_BSIZE; 445 vap->va_type = vp->v_type; 446 vap->va_filerev = 0; 447 448 return (0); 449 } 450 451 /* 452 * XXXXX do we need hpfsnode locking inside? 453 */ 454 static int 455 hpfs_setattr(ap) 456 struct vop_setattr_args /* { 457 struct vnode *a_vp; 458 struct vattr *a_vap; 459 struct ucred *a_cred; 460 struct thread *a_td; 461 } */ *ap; 462 { 463 struct vnode *vp = ap->a_vp; 464 struct hpfsnode *hp = VTOHP(vp); 465 struct vattr *vap = ap->a_vap; 466 struct ucred *cred = ap->a_cred; 467 struct thread *td = ap->a_td; 468 int error; 469 470 dprintf(("hpfs_setattr(0x%x):\n", hp->h_no)); 471 472 /* 473 * Check for unsettable attributes. 474 */ 475 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 476 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 477 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 478 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 479 dprintf(("hpfs_setattr: changing nonsettable attr\n")); 480 return (EINVAL); 481 } 482 483 /* Can't change flags XXX Could be implemented */ 484 if (vap->va_flags != VNOVAL) { 485 printf("hpfs_setattr: FLAGS CANNOT BE SET\n"); 486 return (EINVAL); 487 } 488 489 /* Can't change uid/gid XXX Could be implemented */ 490 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 491 printf("hpfs_setattr: UID/GID CANNOT BE SET\n"); 492 return (EINVAL); 493 } 494 495 /* Can't change mode XXX Could be implemented */ 496 if (vap->va_mode != (mode_t)VNOVAL) { 497 printf("hpfs_setattr: MODE CANNOT BE SET\n"); 498 return (EINVAL); 499 } 500 501 /* Update times */ 502 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 503 if (vp->v_mount->mnt_flag & MNT_RDONLY) 504 return (EROFS); 505 if (vap->va_vaflags & VA_UTIMES_NULL) { 506 error = VOP_ACCESS(vp, VADMIN, cred, td); 507 if (error) 508 error = VOP_ACCESS(vp, VWRITE, cred, td); 509 } else 510 error = VOP_ACCESS(vp, VADMIN, cred, td); 511 if (vap->va_atime.tv_sec != VNOVAL) 512 hp->h_atime = vap->va_atime.tv_sec; 513 if (vap->va_mtime.tv_sec != VNOVAL) 514 hp->h_mtime = vap->va_mtime.tv_sec; 515 516 hp->h_flag |= H_PARCHANGE; 517 } 518 519 if (vap->va_size != VNOVAL) { 520 switch (vp->v_type) { 521 case VDIR: 522 return (EISDIR); 523 case VREG: 524 if (vp->v_mount->mnt_flag & MNT_RDONLY) 525 return (EROFS); 526 break; 527 default: 528 printf("hpfs_setattr: WRONG v_type\n"); 529 return (EINVAL); 530 } 531 532 if (vap->va_size < hp->h_fn.fn_size) { 533 error = vtruncbuf(vp, cred, td, vap->va_size, DEV_BSIZE); 534 if (error) 535 return (error); 536 error = hpfs_truncate(hp, vap->va_size); 537 if (error) 538 return (error); 539 540 } else if (vap->va_size > hp->h_fn.fn_size) { 541 vnode_pager_setsize(vp, vap->va_size); 542 error = hpfs_extend(hp, vap->va_size); 543 if (error) 544 return (error); 545 } 546 } 547 548 return (0); 549 } 550 551 /* 552 * Last reference to a node. If necessary, write or delete it. 553 */ 554 int 555 hpfs_inactive(ap) 556 struct vop_inactive_args /* { 557 struct vnode *a_vp; 558 } */ *ap; 559 { 560 register struct vnode *vp = ap->a_vp; 561 register struct hpfsnode *hp = VTOHP(vp); 562 int error; 563 564 dprintf(("hpfs_inactive(0x%x): \n", hp->h_no)); 565 566 if (hp->h_flag & H_CHANGE) { 567 dprintf(("hpfs_inactive: node changed, update\n")); 568 error = hpfs_update (hp); 569 if (error) 570 return (error); 571 } 572 573 if (hp->h_flag & H_PARCHANGE) { 574 dprintf(("hpfs_inactive: parent node changed, update\n")); 575 error = hpfs_updateparent (hp); 576 if (error) 577 return (error); 578 } 579 580 if (prtactive && vrefcnt(vp) != 0) 581 vprint("hpfs_inactive: pushing active", vp); 582 583 if (hp->h_flag & H_INVAL) { 584 vrecycle(vp, ap->a_td); 585 return (0); 586 } 587 588 return (0); 589 } 590 591 /* 592 * Reclaim an inode so that it can be used for other purposes. 593 */ 594 int 595 hpfs_reclaim(ap) 596 struct vop_reclaim_args /* { 597 struct vnode *a_vp; 598 } */ *ap; 599 { 600 register struct vnode *vp = ap->a_vp; 601 register struct hpfsnode *hp = VTOHP(vp); 602 603 dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no)); 604 605 /* 606 * Destroy the vm object and flush associated pages. 607 */ 608 vnode_destroy_vobject(vp); 609 610 vfs_hash_remove(vp); 611 612 mtx_destroy(&hp->h_interlock); 613 614 vp->v_data = NULL; 615 616 FREE(hp, M_HPFSNO); 617 618 return (0); 619 } 620 621 static int 622 hpfs_print(ap) 623 struct vop_print_args /* { 624 struct vnode *a_vp; 625 } */ *ap; 626 { 627 register struct vnode *vp = ap->a_vp; 628 register struct hpfsnode *hp = VTOHP(vp); 629 630 printf("\tino 0x%x\n", hp->h_no); 631 return (0); 632 } 633 634 /* 635 * Calculate the logical to physical mapping if not done already, 636 * then call the device strategy routine. 637 * 638 * In order to be able to swap to a file, the hpfs_hpbmap operation may not 639 * deadlock on memory. See hpfs_bmap() for details. XXXXXXX (not impl) 640 */ 641 int 642 hpfs_strategy(ap) 643 struct vop_strategy_args /* { 644 struct buf *a_bp; 645 } */ *ap; 646 { 647 register struct buf *bp = ap->a_bp; 648 register struct vnode *vp = ap->a_vp; 649 register struct hpfsnode *hp = VTOHP(ap->a_vp); 650 daddr_t blkno; 651 struct bufobj *bo; 652 int error; 653 654 dprintf(("hpfs_strategy(): \n")); 655 656 if (vp->v_type == VBLK || vp->v_type == VCHR) 657 panic("hpfs_strategy: spec"); 658 if (bp->b_blkno == bp->b_lblkno) { 659 error = hpfs_hpbmap (hp, bp->b_lblkno, &blkno, NULL); 660 bp->b_blkno = blkno; 661 if (error) { 662 printf("hpfs_strategy: hpfs_bpbmap FAILED %d\n", error); 663 bp->b_error = error; 664 bp->b_ioflags |= BIO_ERROR; 665 bufdone(bp); 666 return (0); 667 } 668 if ((long)bp->b_blkno == -1) 669 vfs_bio_clrbuf(bp); 670 } 671 if ((long)bp->b_blkno == -1) { 672 bufdone(bp); 673 return (0); 674 } 675 bp->b_iooffset = dbtob(bp->b_blkno); 676 bo = hp->h_hpmp->hpm_bo; 677 BO_STRATEGY(bo, bp); 678 return (0); 679 } 680 681 /* 682 * XXXXX do we need hpfsnode locking inside? 683 */ 684 int 685 hpfs_access(ap) 686 struct vop_access_args /* { 687 struct vnode *a_vp; 688 int a_mode; 689 struct ucred *a_cred; 690 struct thread *a_td; 691 } */ *ap; 692 { 693 struct vnode *vp = ap->a_vp; 694 struct hpfsnode *hp = VTOHP(vp); 695 mode_t mode = ap->a_mode; 696 697 dprintf(("hpfs_access(0x%x):\n", hp->h_no)); 698 699 /* 700 * Disallow write attempts on read-only filesystems; 701 * unless the file is a socket, fifo, or a block or 702 * character device resident on the filesystem. 703 */ 704 if (mode & VWRITE) { 705 switch ((int)vp->v_type) { 706 case VDIR: 707 case VLNK: 708 case VREG: 709 if (vp->v_mount->mnt_flag & MNT_RDONLY) 710 return (EROFS); 711 break; 712 } 713 } 714 715 return (vaccess(vp->v_type, hp->h_mode, hp->h_uid, hp->h_gid, 716 ap->a_mode, ap->a_cred, NULL)); 717 } 718 719 /* 720 * Open called. 721 * 722 * Nothing to do. 723 */ 724 /* ARGSUSED */ 725 static int 726 hpfs_open(ap) 727 struct vop_open_args /* { 728 struct vnode *a_vp; 729 int a_mode; 730 struct ucred *a_cred; 731 struct thread *a_td; 732 } */ *ap; 733 { 734 #ifdef HPFS_DEBUG 735 register struct vnode *vp = ap->a_vp; 736 register struct hpfsnode *hp = VTOHP(vp); 737 738 printf("hpfs_open(0x%x):\n",hp->h_no); 739 #endif 740 741 /* 742 * Files marked append-only must be opened for appending. 743 */ 744 745 return (0); 746 } 747 748 /* 749 * Close called. 750 * 751 * Update the times on the inode. 752 */ 753 /* ARGSUSED */ 754 static int 755 hpfs_close(ap) 756 struct vop_close_args /* { 757 struct vnode *a_vp; 758 int a_fflag; 759 struct ucred *a_cred; 760 struct thread *a_td; 761 } */ *ap; 762 { 763 #ifdef HPFS_DEBUG 764 register struct vnode *vp = ap->a_vp; 765 register struct hpfsnode *hp = VTOHP(vp); 766 767 printf("hpfs_close: %d\n",hp->h_no); 768 #endif 769 770 return (0); 771 } 772 773 static int 774 hpfs_de_uiomove ( 775 struct hpfsmount *hpmp, 776 struct hpfsdirent *dep, 777 struct uio *uio) 778 { 779 struct dirent cde; 780 int i, error; 781 782 dprintf(("[no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x] ", 783 dep->de_fnode, dep->de_size, dep->de_namelen, 784 dep->de_namelen, dep->de_name, dep->de_flag)); 785 786 /*strncpy(cde.d_name, dep->de_name, dep->de_namelen);*/ 787 for (i=0; i<dep->de_namelen; i++) 788 cde.d_name[i] = hpfs_d2u(hpmp, dep->de_name[i]); 789 790 cde.d_name[dep->de_namelen] = '\0'; 791 cde.d_namlen = dep->de_namelen; 792 cde.d_fileno = dep->de_fnode; 793 cde.d_type = (dep->de_flag & DE_DIR) ? DT_DIR : DT_REG; 794 cde.d_reclen = sizeof(struct dirent); 795 796 error = uiomove((char *)&cde, sizeof(struct dirent), uio); 797 if (error) 798 return (error); 799 800 dprintf(("[0x%x] ", uio->uio_resid)); 801 return (error); 802 } 803 804 805 static struct dirent hpfs_de_dot = 806 { 0, sizeof(struct dirent), DT_DIR, 1, "." }; 807 static struct dirent hpfs_de_dotdot = 808 { 0, sizeof(struct dirent), DT_DIR, 2, ".." }; 809 int 810 hpfs_readdir(ap) 811 struct vop_readdir_args /* { 812 struct vnode *a_vp; 813 struct uio *a_uio; 814 struct ucred *a_cred; 815 int *a_ncookies; 816 u_int **cookies; 817 } */ *ap; 818 { 819 register struct vnode *vp = ap->a_vp; 820 register struct hpfsnode *hp = VTOHP(vp); 821 struct hpfsmount *hpmp = hp->h_hpmp; 822 struct uio *uio = ap->a_uio; 823 int ncookies = 0, i, num, cnum; 824 int error = 0; 825 off_t off; 826 struct buf *bp; 827 struct dirblk *dp; 828 struct hpfsdirent *dep; 829 lsn_t olsn; 830 lsn_t lsn; 831 int level; 832 833 dprintf(("hpfs_readdir(0x%x, 0x%x, 0x%x): ",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid)); 834 835 off = uio->uio_offset; 836 837 if( uio->uio_offset < sizeof(struct dirent) ) { 838 dprintf((". faked, ")); 839 hpfs_de_dot.d_fileno = hp->h_no; 840 error = uiomove((char *)&hpfs_de_dot,sizeof(struct dirent),uio); 841 if(error) { 842 return (error); 843 } 844 845 ncookies ++; 846 } 847 848 if( uio->uio_offset < 2 * sizeof(struct dirent) ) { 849 dprintf((".. faked, ")); 850 hpfs_de_dotdot.d_fileno = hp->h_fn.fn_parent; 851 852 error = uiomove((char *)&hpfs_de_dotdot, sizeof(struct dirent), 853 uio); 854 if(error) { 855 return (error); 856 } 857 858 ncookies ++; 859 } 860 861 num = uio->uio_offset / sizeof(struct dirent) - 2; 862 cnum = 0; 863 864 lsn = ((alleaf_t *)hp->h_fn.fn_abd)->al_lsn; 865 866 olsn = 0; 867 level = 1; 868 869 dive: 870 dprintf(("[dive 0x%x] ", lsn)); 871 error = bread(hp->h_devvp, lsn, D_BSIZE, NOCRED, &bp); 872 if (error) { 873 brelse(bp); 874 return (error); 875 } 876 877 dp = (struct dirblk *) bp->b_data; 878 if (dp->d_magic != D_MAGIC) { 879 printf("hpfs_readdir: MAGIC DOESN'T MATCH\n"); 880 brelse(bp); 881 return (EINVAL); 882 } 883 884 dep = D_DIRENT(dp); 885 886 if (olsn) { 887 dprintf(("[restore 0x%x] ", olsn)); 888 889 while(!(dep->de_flag & DE_END) ) { 890 if((dep->de_flag & DE_DOWN) && 891 (olsn == DE_DOWNLSN(dep))) 892 break; 893 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 894 } 895 896 if((dep->de_flag & DE_DOWN) && (olsn == DE_DOWNLSN(dep))) { 897 if (dep->de_flag & DE_END) 898 goto blockdone; 899 900 if (!(dep->de_flag & DE_SPECIAL)) { 901 if (num <= cnum) { 902 if (uio->uio_resid < sizeof(struct dirent)) { 903 brelse(bp); 904 dprintf(("[resid] ")); 905 goto readdone; 906 } 907 908 error = hpfs_de_uiomove(hpmp, dep, uio); 909 if (error) { 910 brelse (bp); 911 return (error); 912 } 913 ncookies++; 914 915 if (uio->uio_resid < sizeof(struct dirent)) { 916 brelse(bp); 917 dprintf(("[resid] ")); 918 goto readdone; 919 } 920 } 921 cnum++; 922 } 923 924 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 925 } else { 926 printf("hpfs_readdir: ERROR! oLSN not found\n"); 927 brelse(bp); 928 return (EINVAL); 929 } 930 } 931 932 olsn = 0; 933 934 while(!(dep->de_flag & DE_END)) { 935 if(dep->de_flag & DE_DOWN) { 936 lsn = DE_DOWNLSN(dep); 937 brelse(bp); 938 level++; 939 goto dive; 940 } 941 942 if (!(dep->de_flag & DE_SPECIAL)) { 943 if (num <= cnum) { 944 if (uio->uio_resid < sizeof(struct dirent)) { 945 brelse(bp); 946 dprintf(("[resid] ")); 947 goto readdone; 948 } 949 950 error = hpfs_de_uiomove(hpmp, dep, uio); 951 if (error) { 952 brelse (bp); 953 return (error); 954 } 955 ncookies++; 956 957 if (uio->uio_resid < sizeof(struct dirent)) { 958 brelse(bp); 959 dprintf(("[resid] ")); 960 goto readdone; 961 } 962 } 963 cnum++; 964 } 965 966 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 967 } 968 969 if(dep->de_flag & DE_DOWN) { 970 dprintf(("[enddive] ")); 971 lsn = DE_DOWNLSN(dep); 972 brelse(bp); 973 level++; 974 goto dive; 975 } 976 977 blockdone: 978 dprintf(("[EOB] ")); 979 olsn = lsn; 980 lsn = dp->d_parent; 981 brelse(bp); 982 level--; 983 984 dprintf(("[level %d] ", level)); 985 986 if (level > 0) 987 goto dive; /* undive really */ 988 989 if (ap->a_eofflag) { 990 dprintf(("[EOF] ")); 991 *ap->a_eofflag = 1; 992 } 993 994 readdone: 995 dprintf(("[readdone]\n")); 996 if (!error && ap->a_ncookies != NULL) { 997 struct dirent* dpStart; 998 struct dirent* dp; 999 u_long *cookies; 1000 u_long *cookiep; 1001 1002 dprintf(("%d cookies, ",ncookies)); 1003 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1004 panic("hpfs_readdir: unexpected uio from NFS server"); 1005 dpStart = (struct dirent *) 1006 ((caddr_t)uio->uio_iov->iov_base - 1007 (uio->uio_offset - off)); 1008 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), 1009 M_TEMP, M_WAITOK); 1010 for (dp = dpStart, cookiep = cookies, i=0; 1011 i < ncookies; 1012 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) { 1013 off += dp->d_reclen; 1014 *cookiep++ = (u_int) off; 1015 } 1016 *ap->a_ncookies = ncookies; 1017 *ap->a_cookies = cookies; 1018 } 1019 1020 return (0); 1021 } 1022 1023 int 1024 hpfs_lookup(ap) 1025 struct vop_cachedlookup_args /* { 1026 struct vnode *a_dvp; 1027 struct vnode **a_vpp; 1028 struct componentname *a_cnp; 1029 } */ *ap; 1030 { 1031 register struct vnode *dvp = ap->a_dvp; 1032 register struct hpfsnode *dhp = VTOHP(dvp); 1033 struct hpfsmount *hpmp = dhp->h_hpmp; 1034 struct componentname *cnp = ap->a_cnp; 1035 struct ucred *cred = cnp->cn_cred; 1036 int error; 1037 int nameiop = cnp->cn_nameiop; 1038 int flags = cnp->cn_flags; 1039 dprintf(("hpfs_lookup(0x%x, %s, %ld):\n", 1040 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen)); 1041 1042 if (nameiop != CREATE && nameiop != DELETE && nameiop != LOOKUP) { 1043 printf("hpfs_lookup: LOOKUP, DELETE and CREATE are only supported\n"); 1044 return (EOPNOTSUPP); 1045 } 1046 1047 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread); 1048 if(error) 1049 return (error); 1050 1051 if( (cnp->cn_namelen == 1) && 1052 !strncmp(cnp->cn_nameptr,".",1) ) { 1053 dprintf(("hpfs_lookup(0x%x,...): . faked\n",dhp->h_no)); 1054 1055 VREF(dvp); 1056 *ap->a_vpp = dvp; 1057 1058 return (0); 1059 } else if( (cnp->cn_namelen == 2) && 1060 !strncmp(cnp->cn_nameptr,"..",2) && (flags & ISDOTDOT) ) { 1061 dprintf(("hpfs_lookup(0x%x,...): .. faked (0x%x)\n", 1062 dhp->h_no, dhp->h_fn.fn_parent)); 1063 1064 if (VFS_VGET(hpmp->hpm_mp, dhp->h_fn.fn_parent, 1065 LK_NOWAIT | LK_EXCLUSIVE, ap->a_vpp)) { 1066 VOP_UNLOCK(dvp,0,cnp->cn_thread); 1067 error = VFS_VGET(hpmp->hpm_mp, 1068 dhp->h_fn.fn_parent, LK_EXCLUSIVE, ap->a_vpp); 1069 vn_lock(dvp, LK_EXCLUSIVE|LK_RETRY, cnp->cn_thread); 1070 if (error) 1071 return(error); 1072 } 1073 return (0); 1074 } else { 1075 struct buf *bp; 1076 struct hpfsdirent *dep; 1077 struct hpfsnode *hp; 1078 1079 error = hpfs_genlookupbyname(dhp, 1080 cnp->cn_nameptr, cnp->cn_namelen, &bp, &dep); 1081 if (error) { 1082 if ((error == ENOENT) && (flags & ISLASTCN) && 1083 (nameiop == CREATE || nameiop == RENAME)) { 1084 cnp->cn_flags |= SAVENAME; 1085 return (EJUSTRETURN); 1086 } 1087 1088 return (error); 1089 } 1090 1091 dprintf(("hpfs_lookup: fnode: 0x%x, CPID: 0x%x\n", 1092 dep->de_fnode, dep->de_cpid)); 1093 1094 if (nameiop == DELETE && (flags & ISLASTCN)) { 1095 error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread); 1096 if (error) { 1097 brelse(bp); 1098 return (error); 1099 } 1100 } 1101 1102 if (dhp->h_no == dep->de_fnode) { 1103 brelse(bp); 1104 VREF(dvp); 1105 *ap->a_vpp = dvp; 1106 return (0); 1107 } 1108 1109 error = VFS_VGET(hpmp->hpm_mp, dep->de_fnode, LK_EXCLUSIVE, 1110 ap->a_vpp); 1111 if (error) { 1112 printf("hpfs_lookup: VFS_VGET FAILED %d\n", error); 1113 brelse(bp); 1114 return(error); 1115 } 1116 1117 hp = VTOHP(*ap->a_vpp); 1118 1119 hp->h_mtime = dep->de_mtime; 1120 hp->h_ctime = dep->de_ctime; 1121 hp->h_atime = dep->de_atime; 1122 bcopy(dep->de_name, hp->h_name, dep->de_namelen); 1123 hp->h_name[dep->de_namelen] = '\0'; 1124 hp->h_namelen = dep->de_namelen; 1125 hp->h_flag |= H_PARVALID; 1126 1127 brelse(bp); 1128 1129 if ((flags & MAKEENTRY) && 1130 (!(flags & ISLASTCN) || 1131 (nameiop != DELETE && nameiop != CREATE))) 1132 cache_enter(dvp, *ap->a_vpp, cnp); 1133 } 1134 return (error); 1135 } 1136 1137 int 1138 hpfs_remove(ap) 1139 struct vop_remove_args /* { 1140 struct vnode *a_dvp; 1141 struct vnode *a_vp; 1142 struct componentname *a_cnp; 1143 } */ *ap; 1144 { 1145 int error; 1146 1147 dprintf(("hpfs_remove(0x%x, %s, %ld): \n", VTOHP(ap->a_vp)->h_no, 1148 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1149 1150 if (ap->a_vp->v_type == VDIR) 1151 return (EPERM); 1152 1153 error = hpfs_removefnode (ap->a_dvp, ap->a_vp, ap->a_cnp); 1154 return (error); 1155 } 1156 1157 int 1158 hpfs_create(ap) 1159 struct vop_create_args /* { 1160 struct vnode *a_dvp; 1161 struct vnode **a_vpp; 1162 struct componentname *a_cnp; 1163 struct vattr *a_vap; 1164 } */ *ap; 1165 { 1166 int error; 1167 1168 dprintf(("hpfs_create(0x%x, %s, %ld): \n", VTOHP(ap->a_dvp)->h_no, 1169 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1170 1171 if (!(ap->a_cnp->cn_flags & HASBUF)) 1172 panic ("hpfs_create: no name\n"); 1173 1174 error = hpfs_makefnode (ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1175 1176 return (error); 1177 } 1178 1179 /* 1180 * Return POSIX pathconf information applicable to NTFS filesystem 1181 */ 1182 int 1183 hpfs_pathconf(ap) 1184 struct vop_pathconf_args /* { 1185 struct vnode *a_vp; 1186 int a_name; 1187 register_t *a_retval; 1188 } */ *ap; 1189 { 1190 switch (ap->a_name) { 1191 case _PC_LINK_MAX: 1192 *ap->a_retval = 1; 1193 return (0); 1194 case _PC_NAME_MAX: 1195 *ap->a_retval = HPFS_MAXFILENAME; 1196 return (0); 1197 case _PC_PATH_MAX: 1198 *ap->a_retval = PATH_MAX; 1199 return (0); 1200 case _PC_CHOWN_RESTRICTED: 1201 *ap->a_retval = 1; 1202 return (0); 1203 case _PC_NO_TRUNC: 1204 *ap->a_retval = 0; 1205 return (0); 1206 default: 1207 return (EINVAL); 1208 } 1209 /* NOTREACHED */ 1210 } 1211 1212 int 1213 hpfs_vptofh(ap) 1214 struct vop_vptofh_args /* { 1215 struct vnode *a_vp; 1216 struct fid *a_fhp; 1217 } */ *ap; 1218 { 1219 register struct hpfsnode *hpp; 1220 register struct hpfid *hpfhp; 1221 1222 hpp = VTOHP(ap->a_vp); 1223 hpfhp = (struct hpfid *)ap->a_fhp; 1224 hpfhp->hpfid_len = sizeof(struct hpfid); 1225 hpfhp->hpfid_ino = hpp->h_no; 1226 /* hpfhp->hpfid_gen = hpp->h_gen; */ 1227 return (0); 1228 } 1229 1230 1231 /* 1232 * Global vfs data structures 1233 */ 1234 struct vop_vector hpfs_vnodeops = { 1235 .vop_default = &default_vnodeops, 1236 1237 .vop_access = hpfs_access, 1238 .vop_bmap = hpfs_bmap, 1239 .vop_cachedlookup = hpfs_lookup, 1240 .vop_close = hpfs_close, 1241 .vop_create = hpfs_create, 1242 .vop_fsync = hpfs_fsync, 1243 .vop_getattr = hpfs_getattr, 1244 .vop_inactive = hpfs_inactive, 1245 .vop_ioctl = hpfs_ioctl, 1246 .vop_lookup = vfs_cache_lookup, 1247 .vop_open = hpfs_open, 1248 .vop_pathconf = hpfs_pathconf, 1249 .vop_print = hpfs_print, 1250 .vop_read = hpfs_read, 1251 .vop_readdir = hpfs_readdir, 1252 .vop_reclaim = hpfs_reclaim, 1253 .vop_remove = hpfs_remove, 1254 .vop_setattr = hpfs_setattr, 1255 .vop_strategy = hpfs_strategy, 1256 .vop_write = hpfs_write, 1257 .vop_vptofh = hpfs_vptofh, 1258 };
Cache object: fb1e768e43bb1c134d4e649ce5e99702
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