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: src/sys/fs/hpfs/hpfs_vnops.c,v 1.2.2.2 2002/01/15 18:35:09 semenu Exp $ 27 * $DragonFly: src/sys/vfs/hpfs/hpfs_vnops.c,v 1.47 2008/06/19 23:27:39 dillon Exp $ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/proc.h> 34 #include <sys/priv.h> 35 #include <sys/time.h> 36 #include <sys/types.h> 37 #include <sys/stat.h> 38 #include <sys/vnode.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/malloc.h> 42 #include <sys/buf.h> 43 #include <sys/dirent.h> 44 45 #include <machine/limits.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_param.h> 49 #if !defined(__DragonFly__) 50 #include <vm/vm_prot.h> 51 #endif 52 #include <vm/vm_page.h> 53 #include <vm/vm_object.h> 54 #include <vm/vm_pager.h> 55 #include <vm/vm_zone.h> 56 #if defined(__DragonFly__) 57 #include <vm/vnode_pager.h> 58 #endif 59 #include <vm/vm_extern.h> 60 #include <sys/buf2.h> 61 62 #if !defined(__DragonFly__) 63 #include <miscfs/specfs/specdev.h> 64 #include <miscfs/genfs/genfs.h> 65 #endif 66 67 #include <sys/unistd.h> /* for pathconf(2) constants */ 68 69 #include "hpfs.h" 70 #include "hpfsmount.h" 71 #include "hpfs_subr.h" 72 #include "hpfs_ioctl.h" 73 74 static int hpfs_de_uiomove (int *, struct hpfsmount *, 75 struct hpfsdirent *, struct uio *); 76 static int hpfs_ioctl (struct vop_ioctl_args *ap); 77 static int hpfs_read (struct vop_read_args *); 78 static int hpfs_write (struct vop_write_args *ap); 79 static int hpfs_getattr (struct vop_getattr_args *ap); 80 static int hpfs_setattr (struct vop_setattr_args *ap); 81 static int hpfs_inactive (struct vop_inactive_args *ap); 82 static int hpfs_print (struct vop_print_args *ap); 83 static int hpfs_reclaim (struct vop_reclaim_args *ap); 84 static int hpfs_strategy (struct vop_strategy_args *ap); 85 static int hpfs_access (struct vop_access_args *ap); 86 static int hpfs_readdir (struct vop_readdir_args *ap); 87 static int hpfs_lookup (struct vop_old_lookup_args *ap); 88 static int hpfs_create (struct vop_old_create_args *); 89 static int hpfs_remove (struct vop_old_remove_args *); 90 static int hpfs_bmap (struct vop_bmap_args *ap); 91 #if defined(__DragonFly__) 92 static int hpfs_fsync (struct vop_fsync_args *ap); 93 #endif 94 static int hpfs_pathconf (struct vop_pathconf_args *ap); 95 96 #if defined(__DragonFly__) 97 98 /* 99 * hpfs_fsync(struct vnode *a_vp, int a_waitfor) 100 */ 101 static int 102 hpfs_fsync(struct vop_fsync_args *ap) 103 { 104 struct vnode *vp = ap->a_vp; 105 106 /* 107 * Flush all dirty buffers associated with a vnode. 108 */ 109 #ifdef DIAGNOSTIC 110 loop: 111 #endif 112 vfsync(vp, ap->a_waitfor, 0, NULL, NULL); 113 #ifdef DIAGNOSTIC 114 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) { 115 vprint("hpfs_fsync: dirty", vp); 116 goto loop; 117 } 118 #endif 119 120 /* 121 * Write out the on-disc version of the vnode. 122 */ 123 return hpfs_update(VTOHP(vp)); 124 } 125 126 #endif 127 128 /* 129 * hpfs_ioctl(struct vnode *a_vp, u_long a_command, caddr_t a_data, 130 * int a_fflag, struct ucred *a_cred) 131 */ 132 static int 133 hpfs_ioctl(struct vop_ioctl_args *ap) 134 { 135 struct vnode *vp = ap->a_vp; 136 struct hpfsnode *hp = VTOHP(vp); 137 int error; 138 139 kprintf("hpfs_ioctl(0x%x, 0x%lx, 0x%p, 0x%x): ", 140 hp->h_no, ap->a_command, ap->a_data, ap->a_fflag); 141 142 switch (ap->a_command) { 143 case HPFSIOCGEANUM: { 144 u_long eanum; 145 u_long passed; 146 struct ea *eap; 147 148 eanum = 0; 149 150 if (hp->h_fn.fn_ealen > 0) { 151 eap = (struct ea *)&(hp->h_fn.fn_int); 152 passed = 0; 153 154 while (passed < hp->h_fn.fn_ealen) { 155 156 kprintf("EAname: %s\n", EA_NAME(eap)); 157 158 eanum++; 159 passed += sizeof(struct ea) + 160 eap->ea_namelen + 1 + eap->ea_vallen; 161 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 162 passed); 163 } 164 error = 0; 165 } else { 166 error = ENOENT; 167 } 168 169 kprintf("%lu eas\n", eanum); 170 171 *(u_long *)ap->a_data = eanum; 172 173 break; 174 } 175 case HPFSIOCGEASZ: { 176 u_long eanum; 177 u_long passed; 178 struct ea *eap; 179 180 kprintf("EA%ld\n", *(u_long *)ap->a_data); 181 182 eanum = 0; 183 if (hp->h_fn.fn_ealen > 0) { 184 eap = (struct ea *)&(hp->h_fn.fn_int); 185 passed = 0; 186 187 error = ENOENT; 188 while (passed < hp->h_fn.fn_ealen) { 189 kprintf("EAname: %s\n", EA_NAME(eap)); 190 191 if (eanum == *(u_long *)ap->a_data) { 192 *(u_long *)ap->a_data = 193 eap->ea_namelen + 1 + 194 eap->ea_vallen; 195 196 error = 0; 197 break; 198 } 199 200 eanum++; 201 passed += sizeof(struct ea) + 202 eap->ea_namelen + 1 + eap->ea_vallen; 203 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 204 passed); 205 } 206 } else { 207 error = ENOENT; 208 } 209 210 break; 211 } 212 case HPFSIOCRDEA: { 213 u_long eanum; 214 u_long passed; 215 struct hpfs_rdea *rdeap; 216 struct ea *eap; 217 218 rdeap = (struct hpfs_rdea *)ap->a_data; 219 kprintf("EA%ld\n", rdeap->ea_no); 220 221 eanum = 0; 222 if (hp->h_fn.fn_ealen > 0) { 223 eap = (struct ea *)&(hp->h_fn.fn_int); 224 passed = 0; 225 226 error = ENOENT; 227 while (passed < hp->h_fn.fn_ealen) { 228 kprintf("EAname: %s\n", EA_NAME(eap)); 229 230 if (eanum == rdeap->ea_no) { 231 rdeap->ea_sz = eap->ea_namelen + 1 + 232 eap->ea_vallen; 233 copyout(EA_NAME(eap),rdeap->ea_data, 234 rdeap->ea_sz); 235 error = 0; 236 break; 237 } 238 239 eanum++; 240 passed += sizeof(struct ea) + 241 eap->ea_namelen + 1 + eap->ea_vallen; 242 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int + 243 passed); 244 } 245 } else { 246 error = ENOENT; 247 } 248 249 break; 250 } 251 default: 252 error = EOPNOTSUPP; 253 break; 254 } 255 return (error); 256 } 257 258 /* 259 * Map file offset to disk offset. 260 * 261 * hpfs_bmap(struct vnode *a_vp, off_t a_loffset, 262 * off_t *a_doffsetp, int *a_runp, int *a_runb) 263 */ 264 int 265 hpfs_bmap(struct vop_bmap_args *ap) 266 { 267 struct hpfsnode *hp = VTOHP(ap->a_vp); 268 int error; 269 daddr_t lbn; 270 daddr_t dbn; 271 272 if (ap->a_runb != NULL) 273 *ap->a_runb = 0; 274 if (ap->a_doffsetp == NULL) 275 return (0); 276 277 dprintf(("hpfs_bmap(0x%x, 0x%x): ",hp->h_no, ap->a_bn)); 278 279 lbn = ap->a_loffset >> DEV_BSHIFT; 280 KKASSERT(((int)ap->a_loffset & DEV_BMASK) == 0); 281 282 error = hpfs_hpbmap (hp, lbn, &dbn, ap->a_runp); 283 if (error || dbn == (daddr_t)-1) { 284 *ap->a_doffsetp = NOOFFSET; 285 } else { 286 *ap->a_doffsetp = (off_t)dbn << DEV_BSHIFT; 287 } 288 return (error); 289 } 290 291 /* 292 * hpfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 293 * struct ucred *a_cred) 294 */ 295 static int 296 hpfs_read(struct vop_read_args *ap) 297 { 298 struct vnode *vp = ap->a_vp; 299 struct hpfsnode *hp = VTOHP(vp); 300 struct uio *uio = ap->a_uio; 301 struct buf *bp; 302 u_int xfersz, toread; 303 u_int off; 304 daddr_t lbn, bn; 305 int resid; 306 int runl; 307 int error = 0; 308 309 resid = min (uio->uio_resid, hp->h_fn.fn_size - uio->uio_offset); 310 311 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)); 312 313 while (resid) { 314 lbn = uio->uio_offset >> DEV_BSHIFT; 315 off = uio->uio_offset & (DEV_BSIZE - 1); 316 dprintf(("hpfs_read: resid: 0x%x lbn: 0x%x off: 0x%x\n", 317 uio->uio_resid, lbn, off)); 318 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 319 if (error) 320 return (error); 321 322 toread = min(off + resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 323 xfersz = (toread + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 324 dprintf(("hpfs_read: bn: 0x%x (0x%x) toread: 0x%x (0x%x)\n", 325 bn, runl, toread, xfersz)); 326 327 if (toread == 0) 328 break; 329 330 error = bread(hp->h_devvp, dbtodoff(bn), xfersz, &bp); 331 if (error) { 332 brelse(bp); 333 break; 334 } 335 336 error = uiomove(bp->b_data + off, toread - off, uio); 337 if(error) { 338 brelse(bp); 339 break; 340 } 341 brelse(bp); 342 resid -= toread; 343 } 344 dprintf(("hpfs_read: successful\n")); 345 return (error); 346 } 347 348 /* 349 * hpfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 350 * struct ucred *a_cred) 351 */ 352 static int 353 hpfs_write(struct vop_write_args *ap) 354 { 355 struct vnode *vp = ap->a_vp; 356 struct hpfsnode *hp = VTOHP(vp); 357 struct uio *uio = ap->a_uio; 358 struct buf *bp; 359 u_int xfersz, towrite; 360 u_int off; 361 daddr_t lbn, bn; 362 int runl; 363 int error = 0; 364 365 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)); 366 367 if (ap->a_ioflag & IO_APPEND) { 368 dprintf(("hpfs_write: APPEND mode\n")); 369 uio->uio_offset = hp->h_fn.fn_size; 370 } 371 if (uio->uio_offset + uio->uio_resid > hp->h_fn.fn_size) { 372 error = hpfs_extend (hp, uio->uio_offset + uio->uio_resid); 373 if (error) { 374 kprintf("hpfs_write: hpfs_extend FAILED %d\n", error); 375 return (error); 376 } 377 } 378 379 while (uio->uio_resid) { 380 lbn = uio->uio_offset >> DEV_BSHIFT; 381 off = uio->uio_offset & (DEV_BSIZE - 1); 382 dprintf(("hpfs_write: resid: 0x%x lbn: 0x%x off: 0x%x\n", 383 uio->uio_resid, lbn, off)); 384 error = hpfs_hpbmap(hp, lbn, &bn, &runl); 385 if (error) 386 return (error); 387 388 towrite = min(off + uio->uio_resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE)); 389 xfersz = (towrite + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); 390 dprintf(("hpfs_write: bn: 0x%x (0x%x) towrite: 0x%x (0x%x)\n", 391 bn, runl, towrite, xfersz)); 392 393 /* 394 * We do not have to issue a read-before-write if the xfer 395 * size does not cover the whole block. 396 * 397 * In the UIO_NOCOPY case, however, we are not overwriting 398 * anything and must do a read-before-write to fill in 399 * any missing pieces. 400 */ 401 if (off == 0 && towrite == xfersz && 402 uio->uio_segflg != UIO_NOCOPY) { 403 bp = getblk(hp->h_devvp, dbtodoff(bn), xfersz, 0, 0); 404 clrbuf(bp); 405 } else { 406 error = bread(hp->h_devvp, dbtodoff(bn), xfersz, &bp); 407 if (error) { 408 brelse(bp); 409 return (error); 410 } 411 } 412 413 error = uiomove(bp->b_data + off, towrite - off, uio); 414 if(error) { 415 brelse(bp); 416 return (error); 417 } 418 419 if (ap->a_ioflag & IO_SYNC) 420 bwrite(bp); 421 else 422 bawrite(bp); 423 } 424 425 dprintf(("hpfs_write: successful\n")); 426 return (0); 427 } 428 429 /* 430 * XXXXX do we need hpfsnode locking inside? 431 * 432 * hpfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 433 */ 434 static int 435 hpfs_getattr(struct vop_getattr_args *ap) 436 { 437 struct vnode *vp = ap->a_vp; 438 struct hpfsnode *hp = VTOHP(vp); 439 struct vattr *vap = ap->a_vap; 440 int error; 441 442 dprintf(("hpfs_getattr(0x%x):\n", hp->h_no)); 443 444 #if defined(__DragonFly__) 445 vap->va_fsid = dev2udev(hp->h_dev); 446 #else /* defined(__NetBSD__) */ 447 vap->va_fsid = ip->i_dev; 448 #endif 449 vap->va_fileid = hp->h_no; 450 vap->va_mode = hp->h_mode; 451 vap->va_nlink = 1; 452 vap->va_uid = hp->h_uid; 453 vap->va_gid = hp->h_gid; 454 vap->va_rmajor = VNOVAL; 455 vap->va_rminor = VNOVAL; 456 vap->va_size = hp->h_fn.fn_size; 457 vap->va_bytes = ((hp->h_fn.fn_size + DEV_BSIZE-1) & ~(DEV_BSIZE-1)) + 458 DEV_BSIZE; 459 460 if (!(hp->h_flag & H_PARVALID)) { 461 error = hpfs_validateparent(hp); 462 if (error) 463 return (error); 464 } 465 vap->va_atime = hpfstimetounix(hp->h_atime); 466 vap->va_mtime = hpfstimetounix(hp->h_mtime); 467 vap->va_ctime = hpfstimetounix(hp->h_ctime); 468 469 vap->va_flags = 0; 470 vap->va_gen = 0; 471 vap->va_blocksize = DEV_BSIZE; 472 vap->va_type = vp->v_type; 473 vap->va_filerev = 0; 474 475 return (0); 476 } 477 478 /* 479 * XXXXX do we need hpfsnode locking inside? 480 * 481 * hpfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred) 482 */ 483 static int 484 hpfs_setattr(struct vop_setattr_args *ap) 485 { 486 struct vnode *vp = ap->a_vp; 487 struct hpfsnode *hp = VTOHP(vp); 488 struct vattr *vap = ap->a_vap; 489 struct ucred *cred = ap->a_cred; 490 int error; 491 492 dprintf(("hpfs_setattr(0x%x):\n", hp->h_no)); 493 494 /* 495 * Check for unsettable attributes. 496 */ 497 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 498 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 499 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) || 500 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 501 dprintf(("hpfs_setattr: changing nonsettable attr\n")); 502 return (EINVAL); 503 } 504 505 /* Can't change flags XXX Could be implemented */ 506 if (vap->va_flags != VNOVAL) { 507 kprintf("hpfs_setattr: FLAGS CANNOT BE SET\n"); 508 return (EINVAL); 509 } 510 511 /* Can't change uid/gid XXX Could be implemented */ 512 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 513 kprintf("hpfs_setattr: UID/GID CANNOT BE SET\n"); 514 return (EINVAL); 515 } 516 517 /* Can't change mode XXX Could be implemented */ 518 if (vap->va_mode != (mode_t)VNOVAL) { 519 kprintf("hpfs_setattr: MODE CANNOT BE SET\n"); 520 return (EINVAL); 521 } 522 523 /* Update times */ 524 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 525 if (vp->v_mount->mnt_flag & MNT_RDONLY) 526 return (EROFS); 527 if (cred->cr_uid != hp->h_uid && 528 (error = priv_check_cred(cred, PRIV_ROOT, PRISON_ROOT)) && 529 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 530 (error = VOP_ACCESS(vp, VWRITE, cred)))) 531 return (error); 532 if (vap->va_atime.tv_sec != VNOVAL) 533 hp->h_atime = vap->va_atime.tv_sec; 534 if (vap->va_mtime.tv_sec != VNOVAL) 535 hp->h_mtime = vap->va_mtime.tv_sec; 536 537 hp->h_flag |= H_PARCHANGE; 538 } 539 540 if (vap->va_size != VNOVAL) { 541 switch (vp->v_type) { 542 case VDIR: 543 return (EISDIR); 544 case VREG: 545 if (vp->v_mount->mnt_flag & MNT_RDONLY) 546 return (EROFS); 547 break; 548 default: 549 kprintf("hpfs_setattr: WRONG v_type\n"); 550 return (EINVAL); 551 } 552 553 if (vap->va_size < hp->h_fn.fn_size) { 554 #if defined(__DragonFly__) 555 error = vtruncbuf(vp, vap->va_size, DEV_BSIZE); 556 if (error) 557 return (error); 558 #else /* defined(__NetBSD__) */ 559 #error Need alternation for vtruncbuf() 560 #endif 561 error = hpfs_truncate(hp, vap->va_size); 562 if (error) 563 return (error); 564 565 } else if (vap->va_size > hp->h_fn.fn_size) { 566 #if defined(__DragonFly__) 567 vnode_pager_setsize(vp, vap->va_size); 568 #endif 569 error = hpfs_extend(hp, vap->va_size); 570 if (error) 571 return (error); 572 } 573 } 574 575 return (0); 576 } 577 578 /* 579 * Last reference to an node. If necessary, write or delete it. 580 * 581 * hpfs_inactive(struct vnode *a_vp) 582 */ 583 int 584 hpfs_inactive(struct vop_inactive_args *ap) 585 { 586 struct vnode *vp = ap->a_vp; 587 struct hpfsnode *hp = VTOHP(vp); 588 int error; 589 590 dprintf(("hpfs_inactive(0x%x): \n", hp->h_no)); 591 592 if (hp->h_flag & H_CHANGE) { 593 dprintf(("hpfs_inactive: node changed, update\n")); 594 error = hpfs_update (hp); 595 if (error) 596 return (error); 597 } 598 599 if (hp->h_flag & H_PARCHANGE) { 600 dprintf(("hpfs_inactive: parent node changed, update\n")); 601 error = hpfs_updateparent (hp); 602 if (error) 603 return (error); 604 } 605 606 if (prtactive && vp->v_sysref.refcnt > 1) 607 vprint("hpfs_inactive: pushing active", vp); 608 609 if (hp->h_flag & H_INVAL) { 610 #if defined(__DragonFly__) 611 vrecycle(vp); 612 #else /* defined(__NetBSD__) */ 613 vgone(vp); 614 #endif 615 return (0); 616 } 617 return (0); 618 } 619 620 /* 621 * Reclaim an inode so that it can be used for other purposes. 622 * 623 * hpfs_reclaim(struct vnode *a_vp) 624 */ 625 int 626 hpfs_reclaim(struct vop_reclaim_args *ap) 627 { 628 struct vnode *vp = ap->a_vp; 629 struct hpfsnode *hp = VTOHP(vp); 630 631 dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no)); 632 633 hpfs_hphashrem(hp); 634 635 /* Purge old data structures associated with the inode. */ 636 if (hp->h_devvp) { 637 vrele(hp->h_devvp); 638 hp->h_devvp = NULL; 639 } 640 641 vp->v_data = NULL; 642 643 FREE(hp, M_HPFSNO); 644 645 return (0); 646 } 647 648 /* 649 * hpfs_print(struct vnode *a_vp) 650 */ 651 static int 652 hpfs_print(struct vop_print_args *ap) 653 { 654 struct vnode *vp = ap->a_vp; 655 struct hpfsnode *hp = VTOHP(vp); 656 657 kprintf("tag VT_HPFS, ino 0x%x",hp->h_no); 658 lockmgr_printinfo(&vp->v_lock); 659 kprintf("\n"); 660 return (0); 661 } 662 663 /* 664 * Calculate the logical to physical mapping if not done already, 665 * then call the device strategy routine. 666 * 667 * In order to be able to swap to a file, the VOP_BMAP operation may not 668 * deadlock on memory. See hpfs_bmap() for details. XXXXXXX (not impl) 669 * 670 * hpfs_strategy(struct vnode *a_vp, struct bio *a_bio) 671 */ 672 int 673 hpfs_strategy(struct vop_strategy_args *ap) 674 { 675 struct bio *bio = ap->a_bio; 676 struct bio *nbio; 677 struct buf *bp = bio->bio_buf; 678 struct vnode *vp = ap->a_vp; 679 struct hpfsnode *hp; 680 int error; 681 682 dprintf(("hpfs_strategy(): \n")); 683 684 if (vp->v_type == VBLK || vp->v_type == VCHR) 685 panic("hpfs_strategy: spec"); 686 687 nbio = push_bio(bio); 688 if (nbio->bio_offset == NOOFFSET) { 689 error = VOP_BMAP(vp, bio->bio_offset, &nbio->bio_offset, 690 NULL, NULL, bp->b_cmd); 691 if (error) { 692 kprintf("hpfs_strategy: VOP_BMAP FAILED %d\n", error); 693 bp->b_error = error; 694 bp->b_flags |= B_ERROR; 695 /* I/O was never started on nbio, must biodone(bio) */ 696 biodone(bio); 697 return (error); 698 } 699 if (nbio->bio_offset == NOOFFSET) 700 vfs_bio_clrbuf(bp); 701 } 702 if (nbio->bio_offset == NOOFFSET) { 703 /* I/O was never started on nbio, must biodone(bio) */ 704 biodone(bio); 705 return (0); 706 } 707 hp = VTOHP(ap->a_vp); 708 vn_strategy(hp->h_devvp, nbio); 709 return (0); 710 } 711 712 /* 713 * XXXXX do we need hpfsnode locking inside? 714 * 715 * hpfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 716 */ 717 int 718 hpfs_access(struct vop_access_args *ap) 719 { 720 struct vnode *vp = ap->a_vp; 721 struct hpfsnode *hp = VTOHP(vp); 722 struct ucred *cred = ap->a_cred; 723 mode_t mask, mode = ap->a_mode; 724 gid_t *gp; 725 int i; 726 727 dprintf(("hpfs_access(0x%x):\n", hp->h_no)); 728 729 /* 730 * Disallow write attempts on read-only file systems; 731 * unless the file is a socket, fifo, or a block or 732 * character device resident on the file system. 733 */ 734 if (mode & VWRITE) { 735 switch ((int)vp->v_type) { 736 case VDIR: 737 case VLNK: 738 case VREG: 739 if (vp->v_mount->mnt_flag & MNT_RDONLY) 740 return (EROFS); 741 break; 742 } 743 } 744 745 /* Otherwise, user id 0 always gets access. */ 746 if (cred->cr_uid == 0) 747 return (0); 748 749 mask = 0; 750 751 /* Otherwise, check the owner. */ 752 if (cred->cr_uid == hp->h_uid) { 753 if (mode & VEXEC) 754 mask |= S_IXUSR; 755 if (mode & VREAD) 756 mask |= S_IRUSR; 757 if (mode & VWRITE) 758 mask |= S_IWUSR; 759 return ((hp->h_mode & mask) == mask ? 0 : EACCES); 760 } 761 762 /* Otherwise, check the groups. */ 763 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 764 if (hp->h_gid == *gp) { 765 if (mode & VEXEC) 766 mask |= S_IXGRP; 767 if (mode & VREAD) 768 mask |= S_IRGRP; 769 if (mode & VWRITE) 770 mask |= S_IWGRP; 771 return ((hp->h_mode & mask) == mask ? 0 : EACCES); 772 } 773 774 /* Otherwise, check everyone else. */ 775 if (mode & VEXEC) 776 mask |= S_IXOTH; 777 if (mode & VREAD) 778 mask |= S_IROTH; 779 if (mode & VWRITE) 780 mask |= S_IWOTH; 781 return ((hp->h_mode & mask) == mask ? 0 : EACCES); 782 } 783 784 static int 785 hpfs_de_uiomove(int *error, struct hpfsmount *hpmp, struct hpfsdirent *dep, 786 struct uio *uio) 787 { 788 char convname[HPFS_MAXFILENAME + 1]; 789 int i, success; 790 791 dprintf(("[no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x] ", 792 dep->de_fnode, dep->de_size, dep->de_namelen, 793 dep->de_namelen, dep->de_name, dep->de_flag)); 794 795 /*strncpy(cde.d_name, dep->de_name, dep->de_namelen);*/ 796 for (i=0; i<dep->de_namelen; i++) 797 convname[i] = hpfs_d2u(hpmp, dep->de_name[i]); 798 convname[dep->de_namelen] = '\0'; 799 800 success = vop_write_dirent(error, uio, dep->de_fnode, 801 (dep->de_flag & DE_DIR) ? DT_DIR : DT_REG, 802 dep->de_namelen, convname); 803 804 dprintf(("[0x%x] ", uio->uio_resid)); 805 return (success); 806 } 807 808 809 /* 810 * hpfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 811 * int *a_ncookies, off_t **cookies) 812 */ 813 int 814 hpfs_readdir(struct vop_readdir_args *ap) 815 { 816 struct vnode *vp = ap->a_vp; 817 struct hpfsnode *hp = VTOHP(vp); 818 struct hpfsmount *hpmp = hp->h_hpmp; 819 struct uio *uio = ap->a_uio; 820 int ncookies = 0, i, num, cnum; 821 int error = 0; 822 struct buf *bp; 823 struct dirblk *dp; 824 struct hpfsdirent *dep; 825 lsn_t olsn; 826 lsn_t lsn; 827 int level; 828 829 dprintf(("hpfs_readdir(0x%x, 0x%x, 0x%x): ",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid)); 830 831 /* 832 * As we need to fake up . and .., and the remaining directory structure 833 * can't be expressed in one off_t as well, we just increment uio_offset 834 * by 1 for each entry. 835 * 836 * num is the entry we need to start reporting 837 * cnum is the current entry 838 */ 839 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX) 840 return(EINVAL); 841 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 842 return (error); 843 844 num = uio->uio_offset; 845 cnum = 0; 846 847 if( num <= cnum ) { 848 dprintf((". faked, ")); 849 if (vop_write_dirent(&error, uio, hp->h_no, DT_DIR, 1, ".")) 850 goto done; 851 if (error) 852 goto done; 853 ncookies ++; 854 } 855 cnum++; 856 857 if( num <= cnum ) { 858 dprintf((".. faked, ")); 859 if (vop_write_dirent(&error, uio, hp->h_fn.fn_parent, DT_DIR, 2, "..")) 860 goto readdone; 861 if (error) 862 goto done; 863 ncookies ++; 864 } 865 cnum++; 866 867 lsn = ((alleaf_t *)hp->h_fn.fn_abd)->al_lsn; 868 869 olsn = 0; 870 level = 1; 871 872 dive: 873 dprintf(("[dive 0x%x] ", lsn)); 874 error = bread(hp->h_devvp, dbtodoff(lsn), D_BSIZE, &bp); 875 if (error) { 876 brelse(bp); 877 goto done; 878 } 879 880 dp = (struct dirblk *) bp->b_data; 881 if (dp->d_magic != D_MAGIC) { 882 kprintf("hpfs_readdir: MAGIC DOESN'T MATCH\n"); 883 brelse(bp); 884 error = EINVAL; 885 goto done; 886 } 887 888 dep = D_DIRENT(dp); 889 890 if (olsn) { 891 dprintf(("[restore 0x%x] ", olsn)); 892 893 while(!(dep->de_flag & DE_END) ) { 894 if((dep->de_flag & DE_DOWN) && 895 (olsn == DE_DOWNLSN(dep))) 896 break; 897 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 898 } 899 900 if((dep->de_flag & DE_DOWN) && (olsn == DE_DOWNLSN(dep))) { 901 if (dep->de_flag & DE_END) 902 goto blockdone; 903 904 if (!(dep->de_flag & DE_SPECIAL)) { 905 if (num <= cnum) { 906 if (hpfs_de_uiomove(&error, hpmp, dep, uio)) { 907 brelse(bp); 908 dprintf(("[resid] ")); 909 goto readdone; 910 } 911 if (error) { 912 brelse (bp); 913 goto done; 914 } 915 ncookies++; 916 } 917 cnum++; 918 } 919 920 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 921 } else { 922 kprintf("hpfs_readdir: ERROR! oLSN not found\n"); 923 brelse(bp); 924 error = EINVAL; 925 goto done; 926 } 927 } 928 929 olsn = 0; 930 931 while(!(dep->de_flag & DE_END)) { 932 if(dep->de_flag & DE_DOWN) { 933 lsn = DE_DOWNLSN(dep); 934 brelse(bp); 935 level++; 936 goto dive; 937 } 938 939 if (!(dep->de_flag & DE_SPECIAL)) { 940 if (num <= cnum) { 941 if (hpfs_de_uiomove(&error, hpmp, dep, uio)) { 942 brelse(bp); 943 dprintf(("[resid] ")); 944 goto readdone; 945 } 946 if (error) { 947 brelse (bp); 948 goto done; 949 } 950 ncookies++; 951 } 952 cnum++; 953 } 954 955 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen); 956 } 957 958 if(dep->de_flag & DE_DOWN) { 959 dprintf(("[enddive] ")); 960 lsn = DE_DOWNLSN(dep); 961 brelse(bp); 962 level++; 963 goto dive; 964 } 965 966 blockdone: 967 dprintf(("[EOB] ")); 968 olsn = lsn; 969 lsn = dp->d_parent; 970 brelse(bp); 971 level--; 972 973 dprintf(("[level %d] ", level)); 974 975 if (level > 0) 976 goto dive; /* undive really */ 977 978 if (ap->a_eofflag) { 979 dprintf(("[EOF] ")); 980 *ap->a_eofflag = 1; 981 } 982 983 readdone: 984 uio->uio_offset = cnum; 985 dprintf(("[readdone]\n")); 986 if (!error && ap->a_ncookies != NULL) { 987 off_t *cookies; 988 off_t *cookiep; 989 990 dprintf(("%d cookies, ",ncookies)); 991 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 992 panic("hpfs_readdir: unexpected uio from NFS server"); 993 MALLOC(cookies, off_t *, ncookies * sizeof(off_t), 994 M_TEMP, M_WAITOK); 995 for (cookiep = cookies, i=0; i < ncookies; i++) 996 *cookiep++ = ++num; 997 998 *ap->a_ncookies = ncookies; 999 *ap->a_cookies = cookies; 1000 } 1001 1002 done: 1003 vn_unlock(ap->a_vp); 1004 return (error); 1005 } 1006 1007 /* 1008 * hpfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp, 1009 * struct componentname *a_cnp) 1010 */ 1011 int 1012 hpfs_lookup(struct vop_old_lookup_args *ap) 1013 { 1014 struct vnode *dvp = ap->a_dvp; 1015 struct hpfsnode *dhp = VTOHP(dvp); 1016 struct hpfsmount *hpmp = dhp->h_hpmp; 1017 struct componentname *cnp = ap->a_cnp; 1018 struct ucred *cred = cnp->cn_cred; 1019 int error; 1020 int nameiop = cnp->cn_nameiop; 1021 int flags = cnp->cn_flags; 1022 int lockparent = flags & CNP_LOCKPARENT; 1023 #if HPFS_DEBUG 1024 int wantparent = flags & (CNP_LOCKPARENT | CNP_WANTPARENT); 1025 #endif 1026 dprintf(("hpfs_lookup(0x%x, %s, %ld, %d, %d): \n", 1027 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen, 1028 lockparent, wantparent)); 1029 1030 if (nameiop != NAMEI_CREATE && nameiop != NAMEI_DELETE && nameiop != NAMEI_LOOKUP) { 1031 kprintf("hpfs_lookup: LOOKUP, DELETE and CREATE are only supported\n"); 1032 return (EOPNOTSUPP); 1033 } 1034 1035 error = VOP_ACCESS(dvp, VEXEC, cred); 1036 if(error) 1037 return (error); 1038 1039 if( (cnp->cn_namelen == 1) && 1040 !strncmp(cnp->cn_nameptr,".",1) ) { 1041 dprintf(("hpfs_lookup(0x%x,...): . faked\n",dhp->h_no)); 1042 1043 vref(dvp); 1044 *ap->a_vpp = dvp; 1045 1046 return (0); 1047 } else if( (cnp->cn_namelen == 2) && 1048 !strncmp(cnp->cn_nameptr,"..",2) && (flags & CNP_ISDOTDOT) ) { 1049 dprintf(("hpfs_lookup(0x%x,...): .. faked (0x%x)\n", 1050 dhp->h_no, dhp->h_fn.fn_parent)); 1051 1052 VOP__UNLOCK(dvp, 0); 1053 1054 error = VFS_VGET(hpmp->hpm_mp, 1055 dhp->h_fn.fn_parent, ap->a_vpp); 1056 if (error) { 1057 VOP__LOCK(dvp, 0); 1058 return(error); 1059 } 1060 1061 if (lockparent && (error = VOP__LOCK(dvp, 0))) { 1062 vput( *(ap->a_vpp) ); 1063 return (error); 1064 } 1065 return (error); 1066 } else { 1067 struct buf *bp; 1068 struct hpfsdirent *dep; 1069 struct hpfsnode *hp; 1070 1071 error = hpfs_genlookupbyname(dhp, 1072 cnp->cn_nameptr, cnp->cn_namelen, &bp, &dep); 1073 if (error) { 1074 if (error == ENOENT && 1075 (nameiop == NAMEI_CREATE || nameiop == NAMEI_RENAME)) { 1076 if(!lockparent) 1077 VOP__UNLOCK(dvp, 0); 1078 return (EJUSTRETURN); 1079 } 1080 1081 return (error); 1082 } 1083 1084 dprintf(("hpfs_lookup: fnode: 0x%x, CPID: 0x%x\n", 1085 dep->de_fnode, dep->de_cpid)); 1086 1087 if (nameiop == NAMEI_DELETE) { 1088 error = VOP_ACCESS(dvp, VWRITE, cred); 1089 if (error) { 1090 brelse(bp); 1091 return (error); 1092 } 1093 } 1094 1095 if (dhp->h_no == dep->de_fnode) { 1096 brelse(bp); 1097 vref(dvp); 1098 *ap->a_vpp = dvp; 1099 return (0); 1100 } 1101 1102 error = VFS_VGET(hpmp->hpm_mp, dep->de_fnode, ap->a_vpp); 1103 if (error) { 1104 kprintf("hpfs_lookup: VFS_VGET FAILED %d\n", error); 1105 brelse(bp); 1106 return(error); 1107 } 1108 1109 hp = VTOHP(*ap->a_vpp); 1110 1111 hp->h_mtime = dep->de_mtime; 1112 hp->h_ctime = dep->de_ctime; 1113 hp->h_atime = dep->de_atime; 1114 bcopy(dep->de_name, hp->h_name, dep->de_namelen); 1115 hp->h_name[dep->de_namelen] = '\0'; 1116 hp->h_namelen = dep->de_namelen; 1117 hp->h_flag |= H_PARVALID; 1118 1119 brelse(bp); 1120 1121 if(!lockparent) 1122 VOP__UNLOCK(dvp, 0); 1123 } 1124 return (error); 1125 } 1126 1127 /* 1128 * hpfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 1129 * struct componentname *a_cnp) 1130 */ 1131 int 1132 hpfs_remove(struct vop_old_remove_args *ap) 1133 { 1134 int error; 1135 1136 dprintf(("hpfs_remove(0x%x, %s, %ld): \n", VTOHP(ap->a_vp)->h_no, 1137 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1138 1139 if (ap->a_vp->v_type == VDIR) 1140 return (EPERM); 1141 1142 error = hpfs_removefnode (ap->a_dvp, ap->a_vp, ap->a_cnp); 1143 return (error); 1144 } 1145 1146 /* 1147 * hpfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 1148 * struct componentname *a_cnp, struct vattr *a_vap) 1149 */ 1150 int 1151 hpfs_create(struct vop_old_create_args *ap) 1152 { 1153 int error; 1154 1155 dprintf(("hpfs_create(0x%x, %s, %ld): \n", VTOHP(ap->a_dvp)->h_no, 1156 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen)); 1157 1158 error = hpfs_makefnode (ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1159 1160 return (error); 1161 } 1162 1163 /* 1164 * Return POSIX pathconf information applicable to NTFS filesystem 1165 * 1166 * hpfs_pathconf(struct vnode *a_vp, int a_name, t *a_retval) 1167 */ 1168 int 1169 hpfs_pathconf(struct vop_pathconf_args *ap) 1170 { 1171 switch (ap->a_name) { 1172 case _PC_LINK_MAX: 1173 *ap->a_retval = 1; 1174 return (0); 1175 case _PC_NAME_MAX: 1176 *ap->a_retval = HPFS_MAXFILENAME; 1177 return (0); 1178 case _PC_PATH_MAX: 1179 *ap->a_retval = PATH_MAX; 1180 return (0); 1181 case _PC_CHOWN_RESTRICTED: 1182 *ap->a_retval = 1; 1183 return (0); 1184 case _PC_NO_TRUNC: 1185 *ap->a_retval = 0; 1186 return (0); 1187 #if defined(__NetBSD__) 1188 case _PC_SYNC_IO: 1189 *ap->a_retval = 1; 1190 return (0); 1191 case _PC_FILESIZEBITS: 1192 *ap->a_retval = 32; 1193 return (0); 1194 #endif 1195 default: 1196 return (EINVAL); 1197 } 1198 /* NOTREACHED */ 1199 } 1200 1201 1202 /* 1203 * Global vfs data structures 1204 */ 1205 1206 struct vop_ops hpfs_vnode_vops = { 1207 .vop_default = vop_defaultop, 1208 .vop_getattr = hpfs_getattr, 1209 .vop_setattr = hpfs_setattr, 1210 .vop_inactive = hpfs_inactive, 1211 .vop_reclaim = hpfs_reclaim, 1212 .vop_print = hpfs_print, 1213 .vop_old_create = hpfs_create, 1214 .vop_old_remove = hpfs_remove, 1215 .vop_old_lookup = hpfs_lookup, 1216 .vop_access = hpfs_access, 1217 .vop_readdir = hpfs_readdir, 1218 .vop_fsync = hpfs_fsync, 1219 .vop_bmap = hpfs_bmap, 1220 .vop_getpages = vop_stdgetpages, 1221 .vop_putpages = vop_stdputpages, 1222 .vop_strategy = hpfs_strategy, 1223 .vop_read = hpfs_read, 1224 .vop_write = hpfs_write, 1225 .vop_ioctl = hpfs_ioctl, 1226 .vop_pathconf = hpfs_pathconf 1227 }; 1228 1229