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/time.h> 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <sys/vnode.h> 37 #include <sys/mount.h> 38 #include <sys/namei.h> 39 #include <sys/malloc.h> 40 #include <sys/bio.h> 41 #include <sys/buf.h> 42 #include <sys/dirent.h> 43 44 #include <vm/vm.h> 45 #include <vm/vm_param.h> 46 #include <vm/vm_page.h> 47 #include <vm/vm_object.h> 48 #include <vm/vm_pager.h> 49 #include <vm/vnode_pager.h> 50 #include <vm/vm_extern.h> 51 52 #include <sys/unistd.h> /* for pathconf(2) constants */ 53 54 #include <fs/hpfs/hpfs.h> 55 #include <fs/hpfs/hpfsmount.h> 56 #include <fs/hpfs/hpfs_subr.h> 57 #include <fs/hpfs/hpfs_ioctl.h> 58 59 static int hpfs_de_uiomove(struct hpfsmount *, struct hpfsdirent *, 60 struct uio *); 61 static int hpfs_ioctl(struct vop_ioctl_args *ap); 62 static int hpfs_read(struct vop_read_args *); 63 static int hpfs_write(struct vop_write_args *ap); 64 static int hpfs_getattr(struct vop_getattr_args *ap); 65 static int hpfs_setattr(struct vop_setattr_args *ap); 66 static int hpfs_inactive(struct vop_inactive_args *ap); 67 static int hpfs_print(struct vop_print_args *ap); 68 static int hpfs_reclaim(struct vop_reclaim_args *ap); 69 static int hpfs_strategy(struct vop_strategy_args *ap); 70 static int hpfs_access(struct vop_access_args *ap); 71 static int hpfs_open(struct vop_open_args *ap); 72 static int hpfs_close(struct vop_close_args *ap); 73 static int hpfs_readdir(struct vop_readdir_args *ap); 74 static int hpfs_lookup(struct vop_lookup_args *ap); 75 static int hpfs_create(struct vop_create_args *); 76 static int hpfs_remove(struct vop_remove_args *); 77 static int hpfs_bmap(struct vop_bmap_args *ap); 78 static int hpfs_fsync(struct vop_fsync_args *ap); 79 static int hpfs_pathconf(struct vop_pathconf_args *ap); 80 81 static int 82 hpfs_fsync(ap) 83 struct vop_fsync_args /* { 84 struct vnode *a_vp; 85 struct ucred *a_cred; 86 int a_waitfor; 87 struct thread *a_td; 88 } */ *ap; 89 { 90 /* 91 * Flush our dirty buffers. 92 */ 93 vop_stdfsync(ap); 94 95 /* 96 * Write out the on-disc version of the vnode. 97 */ 98 return hpfs_update(VTOHP(ap->a_vp)); 99 } 100 101 static int 102 hpfs_ioctl ( 103 struct vop_ioctl_args /* { 104 struct vnode *a_vp; 105 u_long a_command; 106 caddr_t a_data; 107 int a_fflag; 108 struct ucred *a_cred; 109 struct thread *a_td; 110 } */ *ap) 111 { 112 register struct vnode *vp = ap->a_vp; 113 register struct hpfsnode *hp = VTOHP(vp); 114 int error; 115 116 printf("hpfs_ioctl(0x%x, 0x%lx, 0x%p, 0x%x): ", 117 hp->h_no, ap->a_command, ap->a_data, ap->a_fflag); 118 119 switch (ap->a_command) { 120 case HPFSIOCGEANUM: { 121 u_long eanum; 122 u_long passed; 123 struct ea *eap; 124 125 eanum = 0; 126 127 if (hp->h_fn.fn_ealen > 0) { 128 eap = (struct ea *)&(hp->h_fn.fn_int); 129 passed = 0; 130 131 while (passed < hp->h_fn.fn_ealen) { 132 133 printf("EAname: %s\n", EA_NAME(eap)); 134 135 eanum++; 136 passed += sizeof(struct ea) + 137 eap->ea_namelen + 1 + eap->ea_vallen; 138 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 139 passed); 140 } 141 error = 0; 142 } else { 143 error = ENOENT; 144 } 145 146 printf("%lu eas\n", eanum); 147 148 *(u_long *)ap->a_data = eanum; 149 150 break; 151 } 152 case HPFSIOCGEASZ: { 153 u_long eanum; 154 u_long passed; 155 struct ea *eap; 156 157 printf("EA%ld\n", *(u_long *)ap->a_data); 158 159 eanum = 0; 160 if (hp->h_fn.fn_ealen > 0) { 161 eap = (struct ea *)&(hp->h_fn.fn_int); 162 passed = 0; 163 164 error = ENOENT; 165 while (passed < hp->h_fn.fn_ealen) { 166 printf("EAname: %s\n", EA_NAME(eap)); 167 168 if (eanum == *(u_long *)ap->a_data) { 169 *(u_long *)ap->a_data = 170 eap->ea_namelen + 1 + 171 eap->ea_vallen; 172 173 error = 0; 174 break; 175 } 176 177 eanum++; 178 passed += sizeof(struct ea) + 179 eap->ea_namelen + 1 + eap->ea_vallen; 180 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 181 passed); 182 } 183 } else { 184 error = ENOENT; 185 } 186 187 break; 188 } 189 case HPFSIOCRDEA: { 190 u_long eanum; 191 u_long passed; 192 struct hpfs_rdea *rdeap; 193 struct ea *eap; 194 195 rdeap = (struct hpfs_rdea *)ap->a_data; 196 printf("EA%ld\n", rdeap->ea_no); 197 198 eanum = 0; 199 if (hp->h_fn.fn_ealen > 0) { 200 eap = (struct ea *)&(hp->h_fn.fn_int); 201 passed = 0; 202 203 error = ENOENT; 204 while (passed < hp->h_fn.fn_ealen) { 205 printf("EAname: %s\n", EA_NAME(eap)); 206 207 if (eanum == rdeap->ea_no) { 208 rdeap->ea_sz = eap->ea_namelen + 1 + 209 eap->ea_vallen; 210 copyout(EA_NAME(eap),rdeap->ea_data, 211 rdeap->ea_sz); 212 error = 0; 213 break; 214 } 215 216 eanum++; 217 passed += sizeof(struct ea) + 218 eap->ea_namelen + 1 + eap->ea_vallen; 219 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 220 passed); 221 } 222 } else { 223 error = ENOENT; 224 } 225 226 break; 227 } 228 default: 229 error = ENOTTY; 230 break; 231 } 232 return (error); 233 } 234 235 /* 236 * Map file offset to disk offset. 237 */ 238 int 239 hpfs_bmap(ap) 240 struct vop_bmap_args /* { 241 struct vnode *a_vp; 242 daddr_t a_bn; 243 struct vnode **a_vpp; 244 daddr_t *a_bnp; 245 int *a_runp; 246 int *a_runb; 247 } */ *ap; 248 { 249 register struct hpfsnode *hp = VTOHP(ap->a_vp); 250 daddr_t blkno; 251 int error; 252 253 if (ap->a_vpp != NULL) 254 *ap->a_vpp = hp->h_devvp; 255 if (ap->a_runb != NULL) 256 *ap->a_runb = 0; 257 if (ap->a_bnp == NULL) 258 return (0); 259 260 dprintf(("hpfs_bmap(0x%x, 0x%x): ",hp->h_no, ap->a_bn)); 261 262 error = hpfs_hpbmap (hp, ap->a_bn, &blkno, ap->a_runp); 263 *ap->a_bnp = blkno; 264 265 return (error); 266 } 267 268 static int 269 hpfs_read(ap) 270 struct vop_read_args /* { 271 struct vnode *a_vp; 272 struct uio *a_uio; 273 int a_ioflag; 274 struct ucred *a_cred; 275 } */ *ap; 276 { 277 register struct vnode *vp = ap->a_vp; 278 register struct hpfsnode *hp = VTOHP(vp); 279 struct uio *uio = ap->a_uio; 280 struct buf *bp; 281 u_int xfersz, toread; 282 u_int off; 283 daddr_t lbn, bn; 284 int resid; 285 int runl; 286 int error = 0; 287 288 resid = min (uio->uio_resid, hp->h_fn.fn_size - uio->uio_offset); 289 290 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)); 291 292 while (resid) { 293 lbn = uio->uio_offset >> DEV_BSHIFT; 294 off = uio->uio_offset & (DEV_BSIZE - 1); 295 dprintf(("hpfs_read: resid: 0x%x lbn: 0x%x off: 0x%x\n", 296 uio->uio_resid, lbn, off)); 297 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 298 if (error) 299 return (error); 300 301 toread = min(off + resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 302 xfersz = (toread + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 303 dprintf(("hpfs_read: bn: 0x%x (0x%x) toread: 0x%x (0x%x)\n", 304 bn, runl, toread, xfersz)); 305 306 if (toread == 0) 307 break; 308 309 error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp); 310 if (error) { 311 brelse(bp); 312 break; 313 } 314 315 error = uiomove(bp->b_data + off, toread - off, uio); 316 if(error) { 317 brelse(bp); 318 break; 319 } 320 brelse(bp); 321 resid -= toread; 322 } 323 dprintf(("hpfs_read: successful\n")); 324 return (error); 325 } 326 327 static int 328 hpfs_write(ap) 329 struct vop_write_args /* { 330 struct vnode *a_vp; 331 struct uio *a_uio; 332 int a_ioflag; 333 struct ucred *a_cred; 334 } */ *ap; 335 { 336 register struct vnode *vp = ap->a_vp; 337 register struct hpfsnode *hp = VTOHP(vp); 338 struct uio *uio = ap->a_uio; 339 struct buf *bp; 340 u_int xfersz, towrite; 341 u_int off; 342 daddr_t lbn, bn; 343 int runl; 344 int error = 0; 345 346 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)); 347 348 if (ap->a_ioflag & IO_APPEND) { 349 dprintf(("hpfs_write: APPEND mode\n")); 350 uio->uio_offset = hp->h_fn.fn_size; 351 } 352 if (uio->uio_offset + uio->uio_resid > hp->h_fn.fn_size) { 353 error = hpfs_extend (hp, uio->uio_offset + uio->uio_resid); 354 if (error) { 355 printf("hpfs_write: hpfs_extend FAILED %d\n", error); 356 return (error); 357 } 358 } 359 360 while (uio->uio_resid) { 361 lbn = uio->uio_offset >> DEV_BSHIFT; 362 off = uio->uio_offset & (DEV_BSIZE - 1); 363 dprintf(("hpfs_write: resid: 0x%x lbn: 0x%x off: 0x%x\n", 364 uio->uio_resid, lbn, off)); 365 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 366 if (error) 367 return (error); 368 369 towrite = min(off + uio->uio_resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 370 xfersz = (towrite + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 371 dprintf(("hpfs_write: bn: 0x%x (0x%x) towrite: 0x%x (0x%x)\n", 372 bn, runl, towrite, xfersz)); 373 374 if ((off == 0) && (towrite == xfersz)) { 375 bp = getblk(hp->h_devvp, bn, xfersz, 0, 0, 0); 376 clrbuf(bp); 377 } else { 378 error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp); 379 if (error) { 380 brelse(bp); 381 return (error); 382 } 383 } 384 385 error = uiomove(bp->b_data + off, towrite - off, uio); 386 if(error) { 387 brelse(bp); 388 return (error); 389 } 390 391 if (ap->a_ioflag & IO_SYNC) 392 bwrite(bp); 393 else 394 bawrite(bp); 395 } 396 397 dprintf(("hpfs_write: successful\n")); 398 return (0); 399 } 400 401 /* 402 * XXXXX do we need hpfsnode locking inside? 403 */ 404 static int 405 hpfs_getattr(ap) 406 struct vop_getattr_args /* { 407 struct vnode *a_vp; 408 struct vattr *a_vap; 409 struct ucred *a_cred; 410 struct thread *a_td; 411 } */ *ap; 412 { 413 register struct vnode *vp = ap->a_vp; 414 register struct hpfsnode *hp = VTOHP(vp); 415 register struct vattr *vap = ap->a_vap; 416 int error; 417 418 dprintf(("hpfs_getattr(0x%x):\n", hp->h_no)); 419 420 vap->va_fsid = dev2udev(hp->h_dev); 421 vap->va_fileid = hp->h_no; 422 vap->va_mode = hp->h_mode; 423 vap->va_nlink = 1; 424 vap->va_uid = hp->h_uid; 425 vap->va_gid = hp->h_gid; 426 vap->va_rdev = 0; /* XXX UNODEV ? */ 427 vap->va_size = hp->h_fn.fn_size; 428 vap->va_bytes = ((hp->h_fn.fn_size + DEV_BSIZE-1) & ~(DEV_BSIZE-1)) + 429 DEV_BSIZE; 430 431 if (!(hp->h_flag & H_PARVALID)) { 432 error = hpfs_validateparent(hp); 433 if (error) 434 return (error); 435 } 436 vap->va_atime = hpfstimetounix(hp->h_atime); 437 vap->va_mtime = hpfstimetounix(hp->h_mtime); 438 vap->va_ctime = hpfstimetounix(hp->h_ctime); 439 440 vap->va_flags = 0; 441 vap->va_gen = 0; 442 vap->va_blocksize = DEV_BSIZE; 443 vap->va_type = vp->v_type; 444 vap->va_filerev = 0; 445 446 return (0); 447 } 448 449 /* 450 * XXXXX do we need hpfsnode locking inside? 451 */ 452 static int 453 hpfs_setattr(ap) 454 struct vop_setattr_args /* { 455 struct vnode *a_vp; 456 struct vattr *a_vap; 457 struct ucred *a_cred; 458 struct thread *a_td; 459 } */ *ap; 460 { 461 struct vnode *vp = ap->a_vp; 462 struct hpfsnode *hp = VTOHP(vp); 463 struct vattr *vap = ap->a_vap; 464 struct ucred *cred = ap->a_cred; 465 struct thread *td = ap->a_td; 466 int error; 467 468 dprintf(("hpfs_setattr(0x%x):\n", hp->h_no)); 469 470 /* 471 * Check for unsettable attributes. 472 */ 473 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 474 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 475 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 476 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 477 dprintf(("hpfs_setattr: changing nonsettable attr\n")); 478 return (EINVAL); 479 } 480 481 /* Can't change flags XXX Could be implemented */ 482 if (vap->va_flags != VNOVAL) { 483 printf("hpfs_setattr: FLAGS CANNOT BE SET\n"); 484 return (EINVAL); 485 } 486 487 /* Can't change uid/gid XXX Could be implemented */ 488 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 489 printf("hpfs_setattr: UID/GID CANNOT BE SET\n"); 490 return (EINVAL); 491 } 492 493 /* Can't change mode XXX Could be implemented */ 494 if (vap->va_mode != (mode_t)VNOVAL) { 495 printf("hpfs_setattr: MODE CANNOT BE SET\n"); 496 return (EINVAL); 497 } 498 499 /* Update times */ 500 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 501 if (vp->v_mount->mnt_flag & MNT_RDONLY) 502 return (EROFS); 503 if (cred->cr_uid != hp->h_uid && 504 (error = suser_cred(cred, SUSER_ALLOWJAIL)) && 505 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 506 (error = VOP_ACCESS(vp, VWRITE, cred, td)))) 507 return (error); 508 if (vap->va_atime.tv_sec != VNOVAL) 509 hp->h_atime = vap->va_atime.tv_sec; 510 if (vap->va_mtime.tv_sec != VNOVAL) 511 hp->h_mtime = vap->va_mtime.tv_sec; 512 513 hp->h_flag |= H_PARCHANGE; 514 } 515 516 if (vap->va_size != VNOVAL) { 517 switch (vp->v_type) { 518 case VDIR: 519 return (EISDIR); 520 case VREG: 521 if (vp->v_mount->mnt_flag & MNT_RDONLY) 522 return (EROFS); 523 break; 524 default: 525 printf("hpfs_setattr: WRONG v_type\n"); 526 return (EINVAL); 527 } 528 529 if (vap->va_size < hp->h_fn.fn_size) { 530 error = vtruncbuf(vp, cred, td, vap->va_size, DEV_BSIZE); 531 if (error) 532 return (error); 533 error = hpfs_truncate(hp, vap->va_size); 534 if (error) 535 return (error); 536 537 } else if (vap->va_size > hp->h_fn.fn_size) { 538 vnode_pager_setsize(vp, vap->va_size); 539 error = hpfs_extend(hp, vap->va_size); 540 if (error) 541 return (error); 542 } 543 } 544 545 return (0); 546 } 547 548 /* 549 * Last reference to a node. If necessary, write or delete it. 550 */ 551 int 552 hpfs_inactive(ap) 553 struct vop_inactive_args /* { 554 struct vnode *a_vp; 555 } */ *ap; 556 { 557 register struct vnode *vp = ap->a_vp; 558 register struct hpfsnode *hp = VTOHP(vp); 559 int error; 560 561 dprintf(("hpfs_inactive(0x%x): \n", hp->h_no)); 562 563 if (hp->h_flag & H_CHANGE) { 564 dprintf(("hpfs_inactive: node changed, update\n")); 565 error = hpfs_update (hp); 566 if (error) 567 return (error); 568 } 569 570 if (hp->h_flag & H_PARCHANGE) { 571 dprintf(("hpfs_inactive: parent node changed, update\n")); 572 error = hpfs_updateparent (hp); 573 if (error) 574 return (error); 575 } 576 577 if (prtactive && vrefcnt(vp) != 0) 578 vprint("hpfs_inactive: pushing active", vp); 579 580 if (hp->h_flag & H_INVAL) { 581 VOP_UNLOCK(vp,0,ap->a_td); 582 vrecycle(vp, NULL, ap->a_td); 583 return (0); 584 } 585 586 VOP_UNLOCK(vp,0,ap->a_td); 587 return (0); 588 } 589 590 /* 591 * Reclaim an inode so that it can be used for other purposes. 592 */ 593 int 594 hpfs_reclaim(ap) 595 struct vop_reclaim_args /* { 596 struct vnode *a_vp; 597 } */ *ap; 598 { 599 register struct vnode *vp = ap->a_vp; 600 register struct hpfsnode *hp = VTOHP(vp); 601 602 dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no)); 603 604 hpfs_hphashrem(hp); 605 606 /* Purge old data structures associated with the inode. */ 607 if (hp->h_devvp) { 608 vrele(hp->h_devvp); 609 hp->h_devvp = NULL; 610 } 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 int error; 652 653 KASSERT(ap->a_vp == ap->a_bp->b_vp, ("%s(%p != %p)", 654 __func__, ap->a_vp, ap->a_bp->b_vp)); 655 dprintf(("hpfs_strategy(): \n")); 656 657 if (vp->v_type == VBLK || vp->v_type == VCHR) 658 panic("hpfs_strategy: spec"); 659 if (bp->b_blkno == bp->b_lblkno) { 660 error = hpfs_hpbmap (hp, bp->b_lblkno, &blkno, NULL); 661 bp->b_blkno = blkno; 662 if (error) { 663 printf("hpfs_strategy: hpfs_bpbmap FAILED %d\n", error); 664 bp->b_error = error; 665 bp->b_ioflags |= BIO_ERROR; 666 bufdone(bp); 667 return (error); 668 } 669 if ((long)bp->b_blkno == -1) 670 vfs_bio_clrbuf(bp); 671 } 672 if ((long)bp->b_blkno == -1) { 673 bufdone(bp); 674 return (0); 675 } 676 bp->b_dev = hp->h_devvp->v_rdev; 677 bp->b_iooffset = dbtob(bp->b_blkno); 678 VOP_SPECSTRATEGY(hp->h_devvp, bp); 679 return (0); 680 } 681 682 /* 683 * XXXXX do we need hpfsnode locking inside? 684 */ 685 int 686 hpfs_access(ap) 687 struct vop_access_args /* { 688 struct vnode *a_vp; 689 int a_mode; 690 struct ucred *a_cred; 691 struct thread *a_td; 692 } */ *ap; 693 { 694 struct vnode *vp = ap->a_vp; 695 struct hpfsnode *hp = VTOHP(vp); 696 mode_t mode = ap->a_mode; 697 698 dprintf(("hpfs_access(0x%x):\n", hp->h_no)); 699 700 /* 701 * Disallow write attempts on read-only filesystems; 702 * unless the file is a socket, fifo, or a block or 703 * character device resident on the filesystem. 704 */ 705 if (mode & VWRITE) { 706 switch ((int)vp->v_type) { 707 case VDIR: 708 case VLNK: 709 case VREG: 710 if (vp->v_mount->mnt_flag & MNT_RDONLY) 711 return (EROFS); 712 break; 713 } 714 } 715 716 return (vaccess(vp->v_type, hp->h_mode, hp->h_uid, hp->h_gid, 717 ap->a_mode, ap->a_cred, NULL)); 718 } 719 720 /* 721 * Open called. 722 * 723 * Nothing to do. 724 */ 725 /* ARGSUSED */ 726 static int 727 hpfs_open(ap) 728 struct vop_open_args /* { 729 struct vnode *a_vp; 730 int a_mode; 731 struct ucred *a_cred; 732 struct thread *a_td; 733 } */ *ap; 734 { 735 #if HPFS_DEBUG 736 register struct vnode *vp = ap->a_vp; 737 register struct hpfsnode *hp = VTOHP(vp); 738 739 printf("hpfs_open(0x%x):\n",hp->h_no); 740 #endif 741 742 /* 743 * Files marked append-only must be opened for appending. 744 */ 745 746 return (0); 747 } 748 749 /* 750 * Close called. 751 * 752 * Update the times on the inode. 753 */ 754 /* ARGSUSED */ 755 static int 756 hpfs_close(ap) 757 struct vop_close_args /* { 758 struct vnode *a_vp; 759 int a_fflag; 760 struct ucred *a_cred; 761 struct thread *a_td; 762 } */ *ap; 763 { 764 #if HPFS_DEBUG 765 register struct vnode *vp = ap->a_vp; 766 register struct hpfsnode *hp = VTOHP(vp); 767 768 printf("hpfs_close: %d\n",hp->h_no); 769 #endif 770 771 return (0); 772 } 773 774 static int 775 hpfs_de_uiomove ( 776 struct hpfsmount *hpmp, 777 struct hpfsdirent *dep, 778 struct uio *uio) 779 { 780 struct dirent cde; 781 int i, error; 782 783 dprintf(("[no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x] ", 784 dep->de_fnode, dep->de_size, dep->de_namelen, 785 dep->de_namelen, dep->de_name, dep->de_flag)); 786 787 /*strncpy(cde.d_name, dep->de_name, dep->de_namelen);*/ 788 for (i=0; i<dep->de_namelen; i++) 789 cde.d_name[i] = hpfs_d2u(hpmp, dep->de_name[i]); 790 791 cde.d_name[dep->de_namelen] = '\0'; 792 cde.d_namlen = dep->de_namelen; 793 cde.d_fileno = dep->de_fnode; 794 cde.d_type = (dep->de_flag & DE_DIR) ? DT_DIR : DT_REG; 795 cde.d_reclen = sizeof(struct dirent); 796 797 error = uiomove((char *)&cde, sizeof(struct dirent), uio); 798 if (error) 799 return (error); 800 801 dprintf(("[0x%x] ", uio->uio_resid)); 802 return (error); 803 } 804 805 806 static struct dirent hpfs_de_dot = 807 { 0, sizeof(struct dirent), DT_DIR, 1, "." }; 808 static struct dirent hpfs_de_dotdot = 809 { 0, sizeof(struct dirent), DT_DIR, 2, ".." }; 810 int 811 hpfs_readdir(ap) 812 struct vop_readdir_args /* { 813 struct vnode *a_vp; 814 struct uio *a_uio; 815 struct ucred *a_cred; 816 int *a_ncookies; 817 u_int **cookies; 818 } */ *ap; 819 { 820 register struct vnode *vp = ap->a_vp; 821 register struct hpfsnode *hp = VTOHP(vp); 822 struct hpfsmount *hpmp = hp->h_hpmp; 823 struct uio *uio = ap->a_uio; 824 int ncookies = 0, i, num, cnum; 825 int error = 0; 826 off_t off; 827 struct buf *bp; 828 struct dirblk *dp; 829 struct hpfsdirent *dep; 830 lsn_t olsn; 831 lsn_t lsn; 832 int level; 833 834 dprintf(("hpfs_readdir(0x%x, 0x%x, 0x%x): ",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid)); 835 836 off = uio->uio_offset; 837 838 if( uio->uio_offset < sizeof(struct dirent) ) { 839 dprintf((". faked, ")); 840 hpfs_de_dot.d_fileno = hp->h_no; 841 error = uiomove((char *)&hpfs_de_dot,sizeof(struct dirent),uio); 842 if(error) { 843 return (error); 844 } 845 846 ncookies ++; 847 } 848 849 if( uio->uio_offset < 2 * sizeof(struct dirent) ) { 850 dprintf((".. faked, ")); 851 hpfs_de_dotdot.d_fileno = hp->h_fn.fn_parent; 852 853 error = uiomove((char *)&hpfs_de_dotdot, sizeof(struct dirent), 854 uio); 855 if(error) { 856 return (error); 857 } 858 859 ncookies ++; 860 } 861 862 num = uio->uio_offset / sizeof(struct dirent) - 2; 863 cnum = 0; 864 865 lsn = ((alleaf_t *)hp->h_fn.fn_abd)->al_lsn; 866 867 olsn = 0; 868 level = 1; 869 870 dive: 871 dprintf(("[dive 0x%x] ", lsn)); 872 error = bread(hp->h_devvp, lsn, D_BSIZE, NOCRED, &bp); 873 if (error) { 874 brelse(bp); 875 return (error); 876 } 877 878 dp = (struct dirblk *) bp->b_data; 879 if (dp->d_magic != D_MAGIC) { 880 printf("hpfs_readdir: MAGIC DOESN'T MATCH\n"); 881 brelse(bp); 882 return (EINVAL); 883 } 884 885 dep = D_DIRENT(dp); 886 887 if (olsn) { 888 dprintf(("[restore 0x%x] ", olsn)); 889 890 while(!(dep->de_flag & DE_END) ) { 891 if((dep->de_flag & DE_DOWN) && 892 (olsn == DE_DOWNLSN(dep))) 893 break; 894 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 895 } 896 897 if((dep->de_flag & DE_DOWN) && (olsn == DE_DOWNLSN(dep))) { 898 if (dep->de_flag & DE_END) 899 goto blockdone; 900 901 if (!(dep->de_flag & DE_SPECIAL)) { 902 if (num <= cnum) { 903 if (uio->uio_resid < sizeof(struct dirent)) { 904 brelse(bp); 905 dprintf(("[resid] ")); 906 goto readdone; 907 } 908 909 error = hpfs_de_uiomove(hpmp, dep, uio); 910 if (error) { 911 brelse (bp); 912 return (error); 913 } 914 ncookies++; 915 916 if (uio->uio_resid < sizeof(struct dirent)) { 917 brelse(bp); 918 dprintf(("[resid] ")); 919 goto readdone; 920 } 921 } 922 cnum++; 923 } 924 925 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 926 } else { 927 printf("hpfs_readdir: ERROR! oLSN not found\n"); 928 brelse(bp); 929 return (EINVAL); 930 } 931 } 932 933 olsn = 0; 934 935 while(!(dep->de_flag & DE_END)) { 936 if(dep->de_flag & DE_DOWN) { 937 lsn = DE_DOWNLSN(dep); 938 brelse(bp); 939 level++; 940 goto dive; 941 } 942 943 if (!(dep->de_flag & DE_SPECIAL)) { 944 if (num <= cnum) { 945 if (uio->uio_resid < sizeof(struct dirent)) { 946 brelse(bp); 947 dprintf(("[resid] ")); 948 goto readdone; 949 } 950 951 error = hpfs_de_uiomove(hpmp, dep, uio); 952 if (error) { 953 brelse (bp); 954 return (error); 955 } 956 ncookies++; 957 958 if (uio->uio_resid < sizeof(struct dirent)) { 959 brelse(bp); 960 dprintf(("[resid] ")); 961 goto readdone; 962 } 963 } 964 cnum++; 965 } 966 967 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 968 } 969 970 if(dep->de_flag & DE_DOWN) { 971 dprintf(("[enddive] ")); 972 lsn = DE_DOWNLSN(dep); 973 brelse(bp); 974 level++; 975 goto dive; 976 } 977 978 blockdone: 979 dprintf(("[EOB] ")); 980 olsn = lsn; 981 lsn = dp->d_parent; 982 brelse(bp); 983 level--; 984 985 dprintf(("[level %d] ", level)); 986 987 if (level > 0) 988 goto dive; /* undive really */ 989 990 if (ap->a_eofflag) { 991 dprintf(("[EOF] ")); 992 *ap->a_eofflag = 1; 993 } 994 995 readdone: 996 dprintf(("[readdone]\n")); 997 if (!error && ap->a_ncookies != NULL) { 998 struct dirent* dpStart; 999 struct dirent* dp; 1000 u_long *cookies; 1001 u_long *cookiep; 1002 1003 dprintf(("%d cookies, ",ncookies)); 1004 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1005 panic("hpfs_readdir: unexpected uio from NFS server"); 1006 dpStart = (struct dirent *) 1007 ((caddr_t)uio->uio_iov->iov_base - 1008 (uio->uio_offset - off)); 1009 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), 1010 M_TEMP, M_WAITOK); 1011 for (dp = dpStart, cookiep = cookies, i=0; 1012 i < ncookies; 1013 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) { 1014 off += dp->d_reclen; 1015 *cookiep++ = (u_int) off; 1016 } 1017 *ap->a_ncookies = ncookies; 1018 *ap->a_cookies = cookies; 1019 } 1020 1021 return (0); 1022 } 1023 1024 int 1025 hpfs_lookup(ap) 1026 struct vop_lookup_args /* { 1027 struct vnode *a_dvp; 1028 struct vnode **a_vpp; 1029 struct componentname *a_cnp; 1030 } */ *ap; 1031 { 1032 register struct vnode *dvp = ap->a_dvp; 1033 register struct hpfsnode *dhp = VTOHP(dvp); 1034 struct hpfsmount *hpmp = dhp->h_hpmp; 1035 struct componentname *cnp = ap->a_cnp; 1036 struct ucred *cred = cnp->cn_cred; 1037 int error; 1038 int nameiop = cnp->cn_nameiop; 1039 int flags = cnp->cn_flags; 1040 int lockparent = flags & LOCKPARENT; 1041 #if HPFS_DEBUG 1042 int wantparent = flags & (LOCKPARENT|WANTPARENT); 1043 #endif 1044 dprintf(("hpfs_lookup(0x%x, %s, %ld, %d, %d): \n", 1045 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen, 1046 lockparent, wantparent)); 1047 1048 if (nameiop != CREATE && nameiop != DELETE && nameiop != LOOKUP) { 1049 printf("hpfs_lookup: LOOKUP, DELETE and CREATE are only supported\n"); 1050 return (EOPNOTSUPP); 1051 } 1052 1053 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread); 1054 if(error) 1055 return (error); 1056 1057 if( (cnp->cn_namelen == 1) && 1058 !strncmp(cnp->cn_nameptr,".",1) ) { 1059 dprintf(("hpfs_lookup(0x%x,...): . faked\n",dhp->h_no)); 1060 1061 VREF(dvp); 1062 *ap->a_vpp = dvp; 1063 1064 return (0); 1065 } else if( (cnp->cn_namelen == 2) && 1066 !strncmp(cnp->cn_nameptr,"..",2) && (flags & ISDOTDOT) ) { 1067 dprintf(("hpfs_lookup(0x%x,...): .. faked (0x%x)\n", 1068 dhp->h_no, dhp->h_fn.fn_parent)); 1069 1070 if (VFS_VGET(hpmp->hpm_mp, dhp->h_fn.fn_parent, 1071 LK_NOWAIT | LK_EXCLUSIVE, ap->a_vpp)) { 1072 VOP_UNLOCK(dvp,0,cnp->cn_thread); 1073 error = VFS_VGET(hpmp->hpm_mp, 1074 dhp->h_fn.fn_parent, LK_EXCLUSIVE, ap->a_vpp); 1075 VOP_LOCK(dvp, 0, cnp->cn_thread); 1076 if(error) 1077 return(error); 1078 } 1079 if (!lockparent || !(flags & ISLASTCN)) 1080 VOP_UNLOCK(dvp,0,cnp->cn_thread); 1081 return (0); 1082 } else { 1083 struct buf *bp; 1084 struct hpfsdirent *dep; 1085 struct hpfsnode *hp; 1086 1087 error = hpfs_genlookupbyname(dhp, 1088 cnp->cn_nameptr, cnp->cn_namelen, &bp, &dep); 1089 if (error) { 1090 if ((error == ENOENT) && (flags & ISLASTCN) && 1091 (nameiop == CREATE || nameiop == RENAME)) { 1092 if(!lockparent) 1093 VOP_UNLOCK(dvp, 0, cnp->cn_thread); 1094 cnp->cn_flags |= SAVENAME; 1095 return (EJUSTRETURN); 1096 } 1097 1098 return (error); 1099 } 1100 1101 dprintf(("hpfs_lookup: fnode: 0x%x, CPID: 0x%x\n", 1102 dep->de_fnode, dep->de_cpid)); 1103 1104 if (nameiop == DELETE && (flags & ISLASTCN)) { 1105 error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread); 1106 if (error) { 1107 brelse(bp); 1108 return (error); 1109 } 1110 } 1111 1112 if (dhp->h_no == dep->de_fnode) { 1113 brelse(bp); 1114 VREF(dvp); 1115 *ap->a_vpp = dvp; 1116 return (0); 1117 } 1118 1119 error = VFS_VGET(hpmp->hpm_mp, dep->de_fnode, LK_EXCLUSIVE, 1120 ap->a_vpp); 1121 if (error) { 1122 printf("hpfs_lookup: VFS_VGET FAILED %d\n", error); 1123 brelse(bp); 1124 return(error); 1125 } 1126 1127 hp = VTOHP(*ap->a_vpp); 1128 1129 hp->h_mtime = dep->de_mtime; 1130 hp->h_ctime = dep->de_ctime; 1131 hp->h_atime = dep->de_atime; 1132 bcopy(dep->de_name, hp->h_name, dep->de_namelen); 1133 hp->h_name[dep->de_namelen] = '\0'; 1134 hp->h_namelen = dep->de_namelen; 1135 hp->h_flag |= H_PARVALID; 1136 1137 brelse(bp); 1138 1139 if(!lockparent || !(flags & ISLASTCN)) 1140 VOP_UNLOCK(dvp, 0, cnp->cn_thread); 1141 if ((flags & MAKEENTRY) && 1142 (!(flags & ISLASTCN) || 1143 (nameiop != DELETE && nameiop != CREATE))) 1144 cache_enter(dvp, *ap->a_vpp, cnp); 1145 } 1146 return (error); 1147 } 1148 1149 int 1150 hpfs_remove(ap) 1151 struct vop_remove_args /* { 1152 struct vnode *a_dvp; 1153 struct vnode *a_vp; 1154 struct componentname *a_cnp; 1155 } */ *ap; 1156 { 1157 int error; 1158 1159 dprintf(("hpfs_remove(0x%x, %s, %ld): \n", VTOHP(ap->a_vp)->h_no, 1160 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1161 1162 if (ap->a_vp->v_type == VDIR) 1163 return (EPERM); 1164 1165 error = hpfs_removefnode (ap->a_dvp, ap->a_vp, ap->a_cnp); 1166 return (error); 1167 } 1168 1169 int 1170 hpfs_create(ap) 1171 struct vop_create_args /* { 1172 struct vnode *a_dvp; 1173 struct vnode **a_vpp; 1174 struct componentname *a_cnp; 1175 struct vattr *a_vap; 1176 } */ *ap; 1177 { 1178 int error; 1179 1180 dprintf(("hpfs_create(0x%x, %s, %ld): \n", VTOHP(ap->a_dvp)->h_no, 1181 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1182 1183 if (!(ap->a_cnp->cn_flags & HASBUF)) 1184 panic ("hpfs_create: no name\n"); 1185 1186 error = hpfs_makefnode (ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1187 1188 return (error); 1189 } 1190 1191 /* 1192 * Return POSIX pathconf information applicable to NTFS filesystem 1193 */ 1194 int 1195 hpfs_pathconf(ap) 1196 struct vop_pathconf_args /* { 1197 struct vnode *a_vp; 1198 int a_name; 1199 register_t *a_retval; 1200 } */ *ap; 1201 { 1202 switch (ap->a_name) { 1203 case _PC_LINK_MAX: 1204 *ap->a_retval = 1; 1205 return (0); 1206 case _PC_NAME_MAX: 1207 *ap->a_retval = HPFS_MAXFILENAME; 1208 return (0); 1209 case _PC_PATH_MAX: 1210 *ap->a_retval = PATH_MAX; 1211 return (0); 1212 case _PC_CHOWN_RESTRICTED: 1213 *ap->a_retval = 1; 1214 return (0); 1215 case _PC_NO_TRUNC: 1216 *ap->a_retval = 0; 1217 return (0); 1218 default: 1219 return (EINVAL); 1220 } 1221 /* NOTREACHED */ 1222 } 1223 1224 1225 /* 1226 * Global vfs data structures 1227 */ 1228 vop_t **hpfs_vnodeop_p; 1229 struct vnodeopv_entry_desc hpfs_vnodeop_entries[] = { 1230 { &vop_default_desc, (vop_t *)vop_defaultop }, 1231 1232 { &vop_getattr_desc, (vop_t *)hpfs_getattr }, 1233 { &vop_setattr_desc, (vop_t *)hpfs_setattr }, 1234 { &vop_inactive_desc, (vop_t *)hpfs_inactive }, 1235 { &vop_reclaim_desc, (vop_t *)hpfs_reclaim }, 1236 { &vop_print_desc, (vop_t *)hpfs_print }, 1237 { &vop_create_desc, (vop_t *)hpfs_create }, 1238 { &vop_remove_desc, (vop_t *)hpfs_remove }, 1239 { &vop_cachedlookup_desc, (vop_t *)hpfs_lookup }, 1240 { &vop_lookup_desc, (vop_t *)vfs_cache_lookup }, 1241 { &vop_access_desc, (vop_t *)hpfs_access }, 1242 { &vop_close_desc, (vop_t *)hpfs_close }, 1243 { &vop_open_desc, (vop_t *)hpfs_open }, 1244 { &vop_readdir_desc, (vop_t *)hpfs_readdir }, 1245 { &vop_fsync_desc, (vop_t *)hpfs_fsync }, 1246 { &vop_bmap_desc, (vop_t *)hpfs_bmap }, 1247 { &vop_strategy_desc, (vop_t *)hpfs_strategy }, 1248 { &vop_read_desc, (vop_t *)hpfs_read }, 1249 { &vop_write_desc, (vop_t *)hpfs_write }, 1250 { &vop_ioctl_desc, (vop_t *)hpfs_ioctl }, 1251 { &vop_pathconf_desc, (vop_t *)hpfs_pathconf }, 1252 { NULL, NULL } 1253 }; 1254 1255 static 1256 struct vnodeopv_desc hpfs_vnodeop_opv_desc = 1257 { &hpfs_vnodeop_p, hpfs_vnodeop_entries }; 1258 1259 VNODEOP_SET(hpfs_vnodeop_opv_desc);
Cache object: c25c1aa7bf905e0c78da2dd5effc8d93
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