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