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 82 static int 83 hpfs_fsync(ap) 84 struct vop_fsync_args /* { 85 struct vnode *a_vp; 86 struct ucred *a_cred; 87 int a_waitfor; 88 struct thread *a_td; 89 } */ *ap; 90 { 91 /* 92 * Flush our dirty buffers. 93 */ 94 vop_stdfsync(ap); 95 96 /* 97 * Write out the on-disc version of the vnode. 98 */ 99 return hpfs_update(VTOHP(ap->a_vp)); 100 } 101 102 static int 103 hpfs_ioctl ( 104 struct vop_ioctl_args /* { 105 struct vnode *a_vp; 106 u_long a_command; 107 caddr_t a_data; 108 int a_fflag; 109 struct ucred *a_cred; 110 struct thread *a_td; 111 } */ *ap) 112 { 113 register struct vnode *vp = ap->a_vp; 114 register struct hpfsnode *hp = VTOHP(vp); 115 int error; 116 117 printf("hpfs_ioctl(0x%x, 0x%lx, 0x%p, 0x%x): ", 118 hp->h_no, ap->a_command, ap->a_data, ap->a_fflag); 119 120 switch (ap->a_command) { 121 case HPFSIOCGEANUM: { 122 u_long eanum; 123 u_long passed; 124 struct ea *eap; 125 126 eanum = 0; 127 128 if (hp->h_fn.fn_ealen > 0) { 129 eap = (struct ea *)&(hp->h_fn.fn_int); 130 passed = 0; 131 132 while (passed < hp->h_fn.fn_ealen) { 133 134 printf("EAname: %s\n", EA_NAME(eap)); 135 136 eanum++; 137 passed += sizeof(struct ea) + 138 eap->ea_namelen + 1 + eap->ea_vallen; 139 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 140 passed); 141 } 142 error = 0; 143 } else { 144 error = ENOENT; 145 } 146 147 printf("%lu eas\n", eanum); 148 149 *(u_long *)ap->a_data = eanum; 150 151 break; 152 } 153 case HPFSIOCGEASZ: { 154 u_long eanum; 155 u_long passed; 156 struct ea *eap; 157 158 printf("EA%ld\n", *(u_long *)ap->a_data); 159 160 eanum = 0; 161 if (hp->h_fn.fn_ealen > 0) { 162 eap = (struct ea *)&(hp->h_fn.fn_int); 163 passed = 0; 164 165 error = ENOENT; 166 while (passed < hp->h_fn.fn_ealen) { 167 printf("EAname: %s\n", EA_NAME(eap)); 168 169 if (eanum == *(u_long *)ap->a_data) { 170 *(u_long *)ap->a_data = 171 eap->ea_namelen + 1 + 172 eap->ea_vallen; 173 174 error = 0; 175 break; 176 } 177 178 eanum++; 179 passed += sizeof(struct ea) + 180 eap->ea_namelen + 1 + eap->ea_vallen; 181 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 182 passed); 183 } 184 } else { 185 error = ENOENT; 186 } 187 188 break; 189 } 190 case HPFSIOCRDEA: { 191 u_long eanum; 192 u_long passed; 193 struct hpfs_rdea *rdeap; 194 struct ea *eap; 195 196 rdeap = (struct hpfs_rdea *)ap->a_data; 197 printf("EA%ld\n", rdeap->ea_no); 198 199 eanum = 0; 200 if (hp->h_fn.fn_ealen > 0) { 201 eap = (struct ea *)&(hp->h_fn.fn_int); 202 passed = 0; 203 204 error = ENOENT; 205 while (passed < hp->h_fn.fn_ealen) { 206 printf("EAname: %s\n", EA_NAME(eap)); 207 208 if (eanum == rdeap->ea_no) { 209 rdeap->ea_sz = eap->ea_namelen + 1 + 210 eap->ea_vallen; 211 copyout(EA_NAME(eap),rdeap->ea_data, 212 rdeap->ea_sz); 213 error = 0; 214 break; 215 } 216 217 eanum++; 218 passed += sizeof(struct ea) + 219 eap->ea_namelen + 1 + eap->ea_vallen; 220 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 221 passed); 222 } 223 } else { 224 error = ENOENT; 225 } 226 227 break; 228 } 229 default: 230 error = ENOTTY; 231 break; 232 } 233 return (error); 234 } 235 236 /* 237 * Map file offset to disk offset. 238 */ 239 int 240 hpfs_bmap(ap) 241 struct vop_bmap_args /* { 242 struct vnode *a_vp; 243 daddr_t a_bn; 244 struct bufobj **a_bop; 245 daddr_t *a_bnp; 246 int *a_runp; 247 int *a_runb; 248 } */ *ap; 249 { 250 register struct hpfsnode *hp = VTOHP(ap->a_vp); 251 daddr_t blkno; 252 int error; 253 254 if (ap->a_bop != NULL) 255 *ap->a_bop = &hp->h_devvp->v_bufobj; 256 if (ap->a_runb != NULL) 257 *ap->a_runb = 0; 258 if (ap->a_bnp == NULL) 259 return (0); 260 261 dprintf(("hpfs_bmap(0x%x, 0x%x): ",hp->h_no, ap->a_bn)); 262 263 error = hpfs_hpbmap (hp, ap->a_bn, &blkno, ap->a_runp); 264 *ap->a_bnp = blkno; 265 266 return (error); 267 } 268 269 static int 270 hpfs_read(ap) 271 struct vop_read_args /* { 272 struct vnode *a_vp; 273 struct uio *a_uio; 274 int a_ioflag; 275 struct ucred *a_cred; 276 } */ *ap; 277 { 278 register struct vnode *vp = ap->a_vp; 279 register struct hpfsnode *hp = VTOHP(vp); 280 struct uio *uio = ap->a_uio; 281 struct buf *bp; 282 u_int xfersz, toread; 283 u_int off; 284 daddr_t lbn, bn; 285 int resid; 286 int runl; 287 int error = 0; 288 289 resid = min (uio->uio_resid, hp->h_fn.fn_size - uio->uio_offset); 290 291 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)); 292 293 while (resid) { 294 lbn = uio->uio_offset >> DEV_BSHIFT; 295 off = uio->uio_offset & (DEV_BSIZE - 1); 296 dprintf(("hpfs_read: resid: 0x%x lbn: 0x%x off: 0x%x\n", 297 uio->uio_resid, lbn, off)); 298 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 299 if (error) 300 return (error); 301 302 toread = min(off + resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 303 xfersz = (toread + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 304 dprintf(("hpfs_read: bn: 0x%x (0x%x) toread: 0x%x (0x%x)\n", 305 bn, runl, toread, xfersz)); 306 307 if (toread == 0) 308 break; 309 310 error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp); 311 if (error) { 312 brelse(bp); 313 break; 314 } 315 316 error = uiomove(bp->b_data + off, toread - off, uio); 317 if(error) { 318 brelse(bp); 319 break; 320 } 321 brelse(bp); 322 resid -= toread; 323 } 324 dprintf(("hpfs_read: successful\n")); 325 return (error); 326 } 327 328 static int 329 hpfs_write(ap) 330 struct vop_write_args /* { 331 struct vnode *a_vp; 332 struct uio *a_uio; 333 int a_ioflag; 334 struct ucred *a_cred; 335 } */ *ap; 336 { 337 register struct vnode *vp = ap->a_vp; 338 register struct hpfsnode *hp = VTOHP(vp); 339 struct uio *uio = ap->a_uio; 340 struct buf *bp; 341 u_int xfersz, towrite; 342 u_int off; 343 daddr_t lbn, bn; 344 int runl; 345 int error = 0; 346 347 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)); 348 349 if (ap->a_ioflag & IO_APPEND) { 350 dprintf(("hpfs_write: APPEND mode\n")); 351 uio->uio_offset = hp->h_fn.fn_size; 352 } 353 if (uio->uio_offset + uio->uio_resid > hp->h_fn.fn_size) { 354 error = hpfs_extend (hp, uio->uio_offset + uio->uio_resid); 355 if (error) { 356 printf("hpfs_write: hpfs_extend FAILED %d\n", error); 357 return (error); 358 } 359 } 360 361 while (uio->uio_resid) { 362 lbn = uio->uio_offset >> DEV_BSHIFT; 363 off = uio->uio_offset & (DEV_BSIZE - 1); 364 dprintf(("hpfs_write: resid: 0x%x lbn: 0x%x off: 0x%x\n", 365 uio->uio_resid, lbn, off)); 366 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 367 if (error) 368 return (error); 369 370 towrite = min(off + uio->uio_resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 371 xfersz = (towrite + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 372 dprintf(("hpfs_write: bn: 0x%x (0x%x) towrite: 0x%x (0x%x)\n", 373 bn, runl, towrite, xfersz)); 374 375 if ((off == 0) && (towrite == xfersz)) { 376 bp = getblk(hp->h_devvp, bn, xfersz, 0, 0, 0); 377 clrbuf(bp); 378 } else { 379 error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp); 380 if (error) { 381 brelse(bp); 382 return (error); 383 } 384 } 385 386 error = uiomove(bp->b_data + off, towrite - off, uio); 387 if(error) { 388 brelse(bp); 389 return (error); 390 } 391 392 if (ap->a_ioflag & IO_SYNC) 393 bwrite(bp); 394 else 395 bawrite(bp); 396 } 397 398 dprintf(("hpfs_write: successful\n")); 399 return (0); 400 } 401 402 /* 403 * XXXXX do we need hpfsnode locking inside? 404 */ 405 static int 406 hpfs_getattr(ap) 407 struct vop_getattr_args /* { 408 struct vnode *a_vp; 409 struct vattr *a_vap; 410 struct ucred *a_cred; 411 struct thread *a_td; 412 } */ *ap; 413 { 414 register struct vnode *vp = ap->a_vp; 415 register struct hpfsnode *hp = VTOHP(vp); 416 register struct vattr *vap = ap->a_vap; 417 int error; 418 419 dprintf(("hpfs_getattr(0x%x):\n", hp->h_no)); 420 421 vap->va_fsid = dev2udev(hp->h_dev); 422 vap->va_fileid = hp->h_no; 423 vap->va_mode = hp->h_mode; 424 vap->va_nlink = 1; 425 vap->va_uid = hp->h_uid; 426 vap->va_gid = hp->h_gid; 427 vap->va_rdev = 0; /* XXX UNODEV ? */ 428 vap->va_size = hp->h_fn.fn_size; 429 vap->va_bytes = ((hp->h_fn.fn_size + DEV_BSIZE-1) & ~(DEV_BSIZE-1)) + 430 DEV_BSIZE; 431 432 if (!(hp->h_flag & H_PARVALID)) { 433 error = hpfs_validateparent(hp); 434 if (error) 435 return (error); 436 } 437 vap->va_atime = hpfstimetounix(hp->h_atime); 438 vap->va_mtime = hpfstimetounix(hp->h_mtime); 439 vap->va_ctime = hpfstimetounix(hp->h_ctime); 440 441 vap->va_flags = 0; 442 vap->va_gen = 0; 443 vap->va_blocksize = DEV_BSIZE; 444 vap->va_type = vp->v_type; 445 vap->va_filerev = 0; 446 447 return (0); 448 } 449 450 /* 451 * XXXXX do we need hpfsnode locking inside? 452 */ 453 static int 454 hpfs_setattr(ap) 455 struct vop_setattr_args /* { 456 struct vnode *a_vp; 457 struct vattr *a_vap; 458 struct ucred *a_cred; 459 struct thread *a_td; 460 } */ *ap; 461 { 462 struct vnode *vp = ap->a_vp; 463 struct hpfsnode *hp = VTOHP(vp); 464 struct vattr *vap = ap->a_vap; 465 struct ucred *cred = ap->a_cred; 466 struct thread *td = ap->a_td; 467 int error; 468 469 dprintf(("hpfs_setattr(0x%x):\n", hp->h_no)); 470 471 /* 472 * Check for unsettable attributes. 473 */ 474 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 475 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 476 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 477 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 478 dprintf(("hpfs_setattr: changing nonsettable attr\n")); 479 return (EINVAL); 480 } 481 482 /* Can't change flags XXX Could be implemented */ 483 if (vap->va_flags != VNOVAL) { 484 printf("hpfs_setattr: FLAGS CANNOT BE SET\n"); 485 return (EINVAL); 486 } 487 488 /* Can't change uid/gid XXX Could be implemented */ 489 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 490 printf("hpfs_setattr: UID/GID CANNOT BE SET\n"); 491 return (EINVAL); 492 } 493 494 /* Can't change mode XXX Could be implemented */ 495 if (vap->va_mode != (mode_t)VNOVAL) { 496 printf("hpfs_setattr: MODE CANNOT BE SET\n"); 497 return (EINVAL); 498 } 499 500 /* Update times */ 501 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 502 if (vp->v_mount->mnt_flag & MNT_RDONLY) 503 return (EROFS); 504 if (cred->cr_uid != hp->h_uid && 505 (error = suser_cred(cred, SUSER_ALLOWJAIL)) && 506 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 507 (error = VOP_ACCESS(vp, VWRITE, cred, td)))) 508 return (error); 509 if (vap->va_atime.tv_sec != VNOVAL) 510 hp->h_atime = vap->va_atime.tv_sec; 511 if (vap->va_mtime.tv_sec != VNOVAL) 512 hp->h_mtime = vap->va_mtime.tv_sec; 513 514 hp->h_flag |= H_PARCHANGE; 515 } 516 517 if (vap->va_size != VNOVAL) { 518 switch (vp->v_type) { 519 case VDIR: 520 return (EISDIR); 521 case VREG: 522 if (vp->v_mount->mnt_flag & MNT_RDONLY) 523 return (EROFS); 524 break; 525 default: 526 printf("hpfs_setattr: WRONG v_type\n"); 527 return (EINVAL); 528 } 529 530 if (vap->va_size < hp->h_fn.fn_size) { 531 error = vtruncbuf(vp, cred, td, vap->va_size, DEV_BSIZE); 532 if (error) 533 return (error); 534 error = hpfs_truncate(hp, vap->va_size); 535 if (error) 536 return (error); 537 538 } else if (vap->va_size > hp->h_fn.fn_size) { 539 vnode_pager_setsize(vp, vap->va_size); 540 error = hpfs_extend(hp, vap->va_size); 541 if (error) 542 return (error); 543 } 544 } 545 546 return (0); 547 } 548 549 /* 550 * Last reference to a node. If necessary, write or delete it. 551 */ 552 int 553 hpfs_inactive(ap) 554 struct vop_inactive_args /* { 555 struct vnode *a_vp; 556 } */ *ap; 557 { 558 register struct vnode *vp = ap->a_vp; 559 register struct hpfsnode *hp = VTOHP(vp); 560 int error; 561 562 dprintf(("hpfs_inactive(0x%x): \n", hp->h_no)); 563 564 if (hp->h_flag & H_CHANGE) { 565 dprintf(("hpfs_inactive: node changed, update\n")); 566 error = hpfs_update (hp); 567 if (error) 568 return (error); 569 } 570 571 if (hp->h_flag & H_PARCHANGE) { 572 dprintf(("hpfs_inactive: parent node changed, update\n")); 573 error = hpfs_updateparent (hp); 574 if (error) 575 return (error); 576 } 577 578 if (prtactive && vrefcnt(vp) != 0) 579 vprint("hpfs_inactive: pushing active", vp); 580 581 if (hp->h_flag & H_INVAL) { 582 vrecycle(vp, ap->a_td); 583 return (0); 584 } 585 586 return (0); 587 } 588 589 /* 590 * Reclaim an inode so that it can be used for other purposes. 591 */ 592 int 593 hpfs_reclaim(ap) 594 struct vop_reclaim_args /* { 595 struct vnode *a_vp; 596 } */ *ap; 597 { 598 register struct vnode *vp = ap->a_vp; 599 register struct hpfsnode *hp = VTOHP(vp); 600 601 dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no)); 602 603 /* 604 * Destroy the vm object and flush associated pages. 605 */ 606 vnode_destroy_vobject(vp); 607 608 vfs_hash_remove(vp); 609 610 mtx_destroy(&hp->h_interlock); 611 612 vp->v_data = NULL; 613 614 FREE(hp, M_HPFSNO); 615 616 return (0); 617 } 618 619 static int 620 hpfs_print(ap) 621 struct vop_print_args /* { 622 struct vnode *a_vp; 623 } */ *ap; 624 { 625 register struct vnode *vp = ap->a_vp; 626 register struct hpfsnode *hp = VTOHP(vp); 627 628 printf("\tino 0x%x\n", hp->h_no); 629 return (0); 630 } 631 632 /* 633 * Calculate the logical to physical mapping if not done already, 634 * then call the device strategy routine. 635 * 636 * In order to be able to swap to a file, the hpfs_hpbmap operation may not 637 * deadlock on memory. See hpfs_bmap() for details. XXXXXXX (not impl) 638 */ 639 int 640 hpfs_strategy(ap) 641 struct vop_strategy_args /* { 642 struct buf *a_bp; 643 } */ *ap; 644 { 645 register struct buf *bp = ap->a_bp; 646 register struct vnode *vp = ap->a_vp; 647 register struct hpfsnode *hp = VTOHP(ap->a_vp); 648 daddr_t blkno; 649 struct bufobj *bo; 650 int error; 651 652 dprintf(("hpfs_strategy(): \n")); 653 654 if (vp->v_type == VBLK || vp->v_type == VCHR) 655 panic("hpfs_strategy: spec"); 656 if (bp->b_blkno == bp->b_lblkno) { 657 error = hpfs_hpbmap (hp, bp->b_lblkno, &blkno, NULL); 658 bp->b_blkno = blkno; 659 if (error) { 660 printf("hpfs_strategy: hpfs_bpbmap FAILED %d\n", error); 661 bp->b_error = error; 662 bp->b_ioflags |= BIO_ERROR; 663 bufdone(bp); 664 return (error); 665 } 666 if ((long)bp->b_blkno == -1) 667 vfs_bio_clrbuf(bp); 668 } 669 if ((long)bp->b_blkno == -1) { 670 bufdone(bp); 671 return (0); 672 } 673 bp->b_iooffset = dbtob(bp->b_blkno); 674 bo = hp->h_hpmp->hpm_bo; 675 BO_STRATEGY(bo, bp); 676 return (0); 677 } 678 679 /* 680 * XXXXX do we need hpfsnode locking inside? 681 */ 682 int 683 hpfs_access(ap) 684 struct vop_access_args /* { 685 struct vnode *a_vp; 686 int a_mode; 687 struct ucred *a_cred; 688 struct thread *a_td; 689 } */ *ap; 690 { 691 struct vnode *vp = ap->a_vp; 692 struct hpfsnode *hp = VTOHP(vp); 693 mode_t mode = ap->a_mode; 694 695 dprintf(("hpfs_access(0x%x):\n", hp->h_no)); 696 697 /* 698 * Disallow write attempts on read-only filesystems; 699 * unless the file is a socket, fifo, or a block or 700 * character device resident on the filesystem. 701 */ 702 if (mode & VWRITE) { 703 switch ((int)vp->v_type) { 704 case VDIR: 705 case VLNK: 706 case VREG: 707 if (vp->v_mount->mnt_flag & MNT_RDONLY) 708 return (EROFS); 709 break; 710 } 711 } 712 713 return (vaccess(vp->v_type, hp->h_mode, hp->h_uid, hp->h_gid, 714 ap->a_mode, ap->a_cred, NULL)); 715 } 716 717 /* 718 * Open called. 719 * 720 * Nothing to do. 721 */ 722 /* ARGSUSED */ 723 static int 724 hpfs_open(ap) 725 struct vop_open_args /* { 726 struct vnode *a_vp; 727 int a_mode; 728 struct ucred *a_cred; 729 struct thread *a_td; 730 } */ *ap; 731 { 732 #if HPFS_DEBUG 733 register struct vnode *vp = ap->a_vp; 734 register struct hpfsnode *hp = VTOHP(vp); 735 736 printf("hpfs_open(0x%x):\n",hp->h_no); 737 #endif 738 739 /* 740 * Files marked append-only must be opened for appending. 741 */ 742 743 return (0); 744 } 745 746 /* 747 * Close called. 748 * 749 * Update the times on the inode. 750 */ 751 /* ARGSUSED */ 752 static int 753 hpfs_close(ap) 754 struct vop_close_args /* { 755 struct vnode *a_vp; 756 int a_fflag; 757 struct ucred *a_cred; 758 struct thread *a_td; 759 } */ *ap; 760 { 761 #if HPFS_DEBUG 762 register struct vnode *vp = ap->a_vp; 763 register struct hpfsnode *hp = VTOHP(vp); 764 765 printf("hpfs_close: %d\n",hp->h_no); 766 #endif 767 768 return (0); 769 } 770 771 static int 772 hpfs_de_uiomove ( 773 struct hpfsmount *hpmp, 774 struct hpfsdirent *dep, 775 struct uio *uio) 776 { 777 struct dirent cde; 778 int i, error; 779 780 dprintf(("[no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x] ", 781 dep->de_fnode, dep->de_size, dep->de_namelen, 782 dep->de_namelen, dep->de_name, dep->de_flag)); 783 784 /*strncpy(cde.d_name, dep->de_name, dep->de_namelen);*/ 785 for (i=0; i<dep->de_namelen; i++) 786 cde.d_name[i] = hpfs_d2u(hpmp, dep->de_name[i]); 787 788 cde.d_name[dep->de_namelen] = '\0'; 789 cde.d_namlen = dep->de_namelen; 790 cde.d_fileno = dep->de_fnode; 791 cde.d_type = (dep->de_flag & DE_DIR) ? DT_DIR : DT_REG; 792 cde.d_reclen = sizeof(struct dirent); 793 794 error = uiomove((char *)&cde, sizeof(struct dirent), uio); 795 if (error) 796 return (error); 797 798 dprintf(("[0x%x] ", uio->uio_resid)); 799 return (error); 800 } 801 802 803 static struct dirent hpfs_de_dot = 804 { 0, sizeof(struct dirent), DT_DIR, 1, "." }; 805 static struct dirent hpfs_de_dotdot = 806 { 0, sizeof(struct dirent), DT_DIR, 2, ".." }; 807 int 808 hpfs_readdir(ap) 809 struct vop_readdir_args /* { 810 struct vnode *a_vp; 811 struct uio *a_uio; 812 struct ucred *a_cred; 813 int *a_ncookies; 814 u_int **cookies; 815 } */ *ap; 816 { 817 register struct vnode *vp = ap->a_vp; 818 register struct hpfsnode *hp = VTOHP(vp); 819 struct hpfsmount *hpmp = hp->h_hpmp; 820 struct uio *uio = ap->a_uio; 821 int ncookies = 0, i, num, cnum; 822 int error = 0; 823 off_t off; 824 struct buf *bp; 825 struct dirblk *dp; 826 struct hpfsdirent *dep; 827 lsn_t olsn; 828 lsn_t lsn; 829 int level; 830 831 dprintf(("hpfs_readdir(0x%x, 0x%x, 0x%x): ",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid)); 832 833 off = uio->uio_offset; 834 835 if( uio->uio_offset < sizeof(struct dirent) ) { 836 dprintf((". faked, ")); 837 hpfs_de_dot.d_fileno = hp->h_no; 838 error = uiomove((char *)&hpfs_de_dot,sizeof(struct dirent),uio); 839 if(error) { 840 return (error); 841 } 842 843 ncookies ++; 844 } 845 846 if( uio->uio_offset < 2 * sizeof(struct dirent) ) { 847 dprintf((".. faked, ")); 848 hpfs_de_dotdot.d_fileno = hp->h_fn.fn_parent; 849 850 error = uiomove((char *)&hpfs_de_dotdot, sizeof(struct dirent), 851 uio); 852 if(error) { 853 return (error); 854 } 855 856 ncookies ++; 857 } 858 859 num = uio->uio_offset / sizeof(struct dirent) - 2; 860 cnum = 0; 861 862 lsn = ((alleaf_t *)hp->h_fn.fn_abd)->al_lsn; 863 864 olsn = 0; 865 level = 1; 866 867 dive: 868 dprintf(("[dive 0x%x] ", lsn)); 869 error = bread(hp->h_devvp, lsn, D_BSIZE, NOCRED, &bp); 870 if (error) { 871 brelse(bp); 872 return (error); 873 } 874 875 dp = (struct dirblk *) bp->b_data; 876 if (dp->d_magic != D_MAGIC) { 877 printf("hpfs_readdir: MAGIC DOESN'T MATCH\n"); 878 brelse(bp); 879 return (EINVAL); 880 } 881 882 dep = D_DIRENT(dp); 883 884 if (olsn) { 885 dprintf(("[restore 0x%x] ", olsn)); 886 887 while(!(dep->de_flag & DE_END) ) { 888 if((dep->de_flag & DE_DOWN) && 889 (olsn == DE_DOWNLSN(dep))) 890 break; 891 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 892 } 893 894 if((dep->de_flag & DE_DOWN) && (olsn == DE_DOWNLSN(dep))) { 895 if (dep->de_flag & DE_END) 896 goto blockdone; 897 898 if (!(dep->de_flag & DE_SPECIAL)) { 899 if (num <= cnum) { 900 if (uio->uio_resid < sizeof(struct dirent)) { 901 brelse(bp); 902 dprintf(("[resid] ")); 903 goto readdone; 904 } 905 906 error = hpfs_de_uiomove(hpmp, dep, uio); 907 if (error) { 908 brelse (bp); 909 return (error); 910 } 911 ncookies++; 912 913 if (uio->uio_resid < sizeof(struct dirent)) { 914 brelse(bp); 915 dprintf(("[resid] ")); 916 goto readdone; 917 } 918 } 919 cnum++; 920 } 921 922 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 923 } else { 924 printf("hpfs_readdir: ERROR! oLSN not found\n"); 925 brelse(bp); 926 return (EINVAL); 927 } 928 } 929 930 olsn = 0; 931 932 while(!(dep->de_flag & DE_END)) { 933 if(dep->de_flag & DE_DOWN) { 934 lsn = DE_DOWNLSN(dep); 935 brelse(bp); 936 level++; 937 goto dive; 938 } 939 940 if (!(dep->de_flag & DE_SPECIAL)) { 941 if (num <= cnum) { 942 if (uio->uio_resid < sizeof(struct dirent)) { 943 brelse(bp); 944 dprintf(("[resid] ")); 945 goto readdone; 946 } 947 948 error = hpfs_de_uiomove(hpmp, dep, uio); 949 if (error) { 950 brelse (bp); 951 return (error); 952 } 953 ncookies++; 954 955 if (uio->uio_resid < sizeof(struct dirent)) { 956 brelse(bp); 957 dprintf(("[resid] ")); 958 goto readdone; 959 } 960 } 961 cnum++; 962 } 963 964 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 965 } 966 967 if(dep->de_flag & DE_DOWN) { 968 dprintf(("[enddive] ")); 969 lsn = DE_DOWNLSN(dep); 970 brelse(bp); 971 level++; 972 goto dive; 973 } 974 975 blockdone: 976 dprintf(("[EOB] ")); 977 olsn = lsn; 978 lsn = dp->d_parent; 979 brelse(bp); 980 level--; 981 982 dprintf(("[level %d] ", level)); 983 984 if (level > 0) 985 goto dive; /* undive really */ 986 987 if (ap->a_eofflag) { 988 dprintf(("[EOF] ")); 989 *ap->a_eofflag = 1; 990 } 991 992 readdone: 993 dprintf(("[readdone]\n")); 994 if (!error && ap->a_ncookies != NULL) { 995 struct dirent* dpStart; 996 struct dirent* dp; 997 u_long *cookies; 998 u_long *cookiep; 999 1000 dprintf(("%d cookies, ",ncookies)); 1001 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1002 panic("hpfs_readdir: unexpected uio from NFS server"); 1003 dpStart = (struct dirent *) 1004 ((caddr_t)uio->uio_iov->iov_base - 1005 (uio->uio_offset - off)); 1006 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), 1007 M_TEMP, M_WAITOK); 1008 for (dp = dpStart, cookiep = cookies, i=0; 1009 i < ncookies; 1010 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) { 1011 off += dp->d_reclen; 1012 *cookiep++ = (u_int) off; 1013 } 1014 *ap->a_ncookies = ncookies; 1015 *ap->a_cookies = cookies; 1016 } 1017 1018 return (0); 1019 } 1020 1021 int 1022 hpfs_lookup(ap) 1023 struct vop_cachedlookup_args /* { 1024 struct vnode *a_dvp; 1025 struct vnode **a_vpp; 1026 struct componentname *a_cnp; 1027 } */ *ap; 1028 { 1029 register struct vnode *dvp = ap->a_dvp; 1030 register struct hpfsnode *dhp = VTOHP(dvp); 1031 struct hpfsmount *hpmp = dhp->h_hpmp; 1032 struct componentname *cnp = ap->a_cnp; 1033 struct ucred *cred = cnp->cn_cred; 1034 int error; 1035 int nameiop = cnp->cn_nameiop; 1036 int flags = cnp->cn_flags; 1037 dprintf(("hpfs_lookup(0x%x, %s, %ld):\n", 1038 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen)); 1039 1040 if (nameiop != CREATE && nameiop != DELETE && nameiop != LOOKUP) { 1041 printf("hpfs_lookup: LOOKUP, DELETE and CREATE are only supported\n"); 1042 return (EOPNOTSUPP); 1043 } 1044 1045 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread); 1046 if(error) 1047 return (error); 1048 1049 if( (cnp->cn_namelen == 1) && 1050 !strncmp(cnp->cn_nameptr,".",1) ) { 1051 dprintf(("hpfs_lookup(0x%x,...): . faked\n",dhp->h_no)); 1052 1053 VREF(dvp); 1054 *ap->a_vpp = dvp; 1055 1056 return (0); 1057 } else if( (cnp->cn_namelen == 2) && 1058 !strncmp(cnp->cn_nameptr,"..",2) && (flags & ISDOTDOT) ) { 1059 dprintf(("hpfs_lookup(0x%x,...): .. faked (0x%x)\n", 1060 dhp->h_no, dhp->h_fn.fn_parent)); 1061 1062 if (VFS_VGET(hpmp->hpm_mp, dhp->h_fn.fn_parent, 1063 LK_NOWAIT | LK_EXCLUSIVE, ap->a_vpp)) { 1064 VOP_UNLOCK(dvp,0,cnp->cn_thread); 1065 error = VFS_VGET(hpmp->hpm_mp, 1066 dhp->h_fn.fn_parent, LK_EXCLUSIVE, ap->a_vpp); 1067 vn_lock(dvp, LK_EXCLUSIVE|LK_RETRY, cnp->cn_thread); 1068 if (error) 1069 return(error); 1070 } 1071 return (0); 1072 } else { 1073 struct buf *bp; 1074 struct hpfsdirent *dep; 1075 struct hpfsnode *hp; 1076 1077 error = hpfs_genlookupbyname(dhp, 1078 cnp->cn_nameptr, cnp->cn_namelen, &bp, &dep); 1079 if (error) { 1080 if ((error == ENOENT) && (flags & ISLASTCN) && 1081 (nameiop == CREATE || nameiop == RENAME)) { 1082 cnp->cn_flags |= SAVENAME; 1083 return (EJUSTRETURN); 1084 } 1085 1086 return (error); 1087 } 1088 1089 dprintf(("hpfs_lookup: fnode: 0x%x, CPID: 0x%x\n", 1090 dep->de_fnode, dep->de_cpid)); 1091 1092 if (nameiop == DELETE && (flags & ISLASTCN)) { 1093 error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread); 1094 if (error) { 1095 brelse(bp); 1096 return (error); 1097 } 1098 } 1099 1100 if (dhp->h_no == dep->de_fnode) { 1101 brelse(bp); 1102 VREF(dvp); 1103 *ap->a_vpp = dvp; 1104 return (0); 1105 } 1106 1107 error = VFS_VGET(hpmp->hpm_mp, dep->de_fnode, LK_EXCLUSIVE, 1108 ap->a_vpp); 1109 if (error) { 1110 printf("hpfs_lookup: VFS_VGET FAILED %d\n", error); 1111 brelse(bp); 1112 return(error); 1113 } 1114 1115 hp = VTOHP(*ap->a_vpp); 1116 1117 hp->h_mtime = dep->de_mtime; 1118 hp->h_ctime = dep->de_ctime; 1119 hp->h_atime = dep->de_atime; 1120 bcopy(dep->de_name, hp->h_name, dep->de_namelen); 1121 hp->h_name[dep->de_namelen] = '\0'; 1122 hp->h_namelen = dep->de_namelen; 1123 hp->h_flag |= H_PARVALID; 1124 1125 brelse(bp); 1126 1127 if ((flags & MAKEENTRY) && 1128 (!(flags & ISLASTCN) || 1129 (nameiop != DELETE && nameiop != CREATE))) 1130 cache_enter(dvp, *ap->a_vpp, cnp); 1131 } 1132 return (error); 1133 } 1134 1135 int 1136 hpfs_remove(ap) 1137 struct vop_remove_args /* { 1138 struct vnode *a_dvp; 1139 struct vnode *a_vp; 1140 struct componentname *a_cnp; 1141 } */ *ap; 1142 { 1143 int error; 1144 1145 dprintf(("hpfs_remove(0x%x, %s, %ld): \n", VTOHP(ap->a_vp)->h_no, 1146 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1147 1148 if (ap->a_vp->v_type == VDIR) 1149 return (EPERM); 1150 1151 error = hpfs_removefnode (ap->a_dvp, ap->a_vp, ap->a_cnp); 1152 return (error); 1153 } 1154 1155 int 1156 hpfs_create(ap) 1157 struct vop_create_args /* { 1158 struct vnode *a_dvp; 1159 struct vnode **a_vpp; 1160 struct componentname *a_cnp; 1161 struct vattr *a_vap; 1162 } */ *ap; 1163 { 1164 int error; 1165 1166 dprintf(("hpfs_create(0x%x, %s, %ld): \n", VTOHP(ap->a_dvp)->h_no, 1167 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1168 1169 if (!(ap->a_cnp->cn_flags & HASBUF)) 1170 panic ("hpfs_create: no name\n"); 1171 1172 error = hpfs_makefnode (ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1173 1174 return (error); 1175 } 1176 1177 /* 1178 * Return POSIX pathconf information applicable to NTFS filesystem 1179 */ 1180 int 1181 hpfs_pathconf(ap) 1182 struct vop_pathconf_args /* { 1183 struct vnode *a_vp; 1184 int a_name; 1185 register_t *a_retval; 1186 } */ *ap; 1187 { 1188 switch (ap->a_name) { 1189 case _PC_LINK_MAX: 1190 *ap->a_retval = 1; 1191 return (0); 1192 case _PC_NAME_MAX: 1193 *ap->a_retval = HPFS_MAXFILENAME; 1194 return (0); 1195 case _PC_PATH_MAX: 1196 *ap->a_retval = PATH_MAX; 1197 return (0); 1198 case _PC_CHOWN_RESTRICTED: 1199 *ap->a_retval = 1; 1200 return (0); 1201 case _PC_NO_TRUNC: 1202 *ap->a_retval = 0; 1203 return (0); 1204 default: 1205 return (EINVAL); 1206 } 1207 /* NOTREACHED */ 1208 } 1209 1210 1211 /* 1212 * Global vfs data structures 1213 */ 1214 struct vop_vector hpfs_vnodeops = { 1215 .vop_default = &default_vnodeops, 1216 1217 .vop_access = hpfs_access, 1218 .vop_bmap = hpfs_bmap, 1219 .vop_cachedlookup = hpfs_lookup, 1220 .vop_close = hpfs_close, 1221 .vop_create = hpfs_create, 1222 .vop_fsync = hpfs_fsync, 1223 .vop_getattr = hpfs_getattr, 1224 .vop_inactive = hpfs_inactive, 1225 .vop_ioctl = hpfs_ioctl, 1226 .vop_lookup = vfs_cache_lookup, 1227 .vop_open = hpfs_open, 1228 .vop_pathconf = hpfs_pathconf, 1229 .vop_print = hpfs_print, 1230 .vop_read = hpfs_read, 1231 .vop_readdir = hpfs_readdir, 1232 .vop_reclaim = hpfs_reclaim, 1233 .vop_remove = hpfs_remove, 1234 .vop_setattr = hpfs_setattr, 1235 .vop_strategy = hpfs_strategy, 1236 .vop_write = hpfs_write, 1237 };
Cache object: ac5a908708a690159ff07e7490663a5d
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