chfs_vnops.c revision 1.38
1 /* $NetBSD: chfs_vnops.c,v 1.38 2020/04/23 21:47:08 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 Department of Software Engineering, 5 * University of Szeged, Hungary 6 * Copyright (C) 2010 Tamas Toth <ttoth (at) inf.u-szeged.hu> 7 * Copyright (C) 2010 Adam Hoka <ahoka (at) NetBSD.org> 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by the Department of Software Engineering, University of Szeged, Hungary 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <miscfs/specfs/specdev.h> 37 #include <miscfs/fifofs/fifo.h> 38 #include <miscfs/genfs/genfs.h> 39 #include <ufs/ufs/dir.h> 40 #include <ufs/ufs/ufs_extern.h> 41 #include <uvm/uvm.h> 42 #include <sys/namei.h> 43 #include <sys/stat.h> 44 #include <sys/fcntl.h> 45 #include <sys/buf.h> 46 #include <sys/vnode.h> 47 48 #include "chfs.h" 49 50 #define READ_S "chfs_read" 51 52 int 53 chfs_lookup(void *v) 54 { 55 struct vnode *dvp = ((struct vop_lookup_v2_args *) v)->a_dvp; 56 struct vnode **vpp = ((struct vop_lookup_v2_args *) v)->a_vpp; 57 struct componentname *cnp = ((struct vop_lookup_v2_args *) v)->a_cnp; 58 59 int error; 60 struct chfs_inode* ip; 61 struct ufsmount* ump; 62 struct chfs_mount* chmp; 63 struct chfs_vnode_cache* chvc __diagused; 64 struct chfs_dirent* fd; 65 66 dbg("lookup(): %s\n", cnp->cn_nameptr); 67 68 KASSERT(VOP_ISLOCKED(dvp)); 69 70 *vpp = NULL; 71 72 /* Check accessibility of requested node as a first step. */ 73 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 74 if (error != 0) { 75 goto out; 76 } 77 78 /* If requesting the last path component on a read-only file system 79 * with a write operation, deny it. */ 80 if ((cnp->cn_flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) 81 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 82 error = EROFS; 83 goto out; 84 } 85 86 /* Avoid doing a linear scan of the directory if the requested 87 * directory/name couple is already in the cache. */ 88 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 89 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 90 return (*vpp == NULLVP ? ENOENT : 0); 91 } 92 93 /* May need to restart the lookup with an exclusive lock. */ 94 if (VOP_ISLOCKED(dvp) != LK_EXCLUSIVE) 95 return ENOLCK; 96 97 ip = VTOI(dvp); 98 ump = VFSTOUFS(dvp->v_mount); 99 chmp = ump->um_chfs; 100 if (ip->ino == 0) { 101 ip->ino = ++chmp->chm_max_vno; 102 } 103 mutex_enter(&chmp->chm_lock_vnocache); 104 chvc = chfs_vnode_cache_get(chmp, ip->ino); 105 mutex_exit(&chmp->chm_lock_vnocache); 106 107 /* We cannot be requesting the parent directory of the root node. */ 108 KASSERT(IMPLIES(ip->ch_type == CHT_DIR && chvc->pvno == chvc->vno, 109 !(cnp->cn_flags & ISDOTDOT))); 110 111 if (cnp->cn_flags & ISDOTDOT) { 112 VOP_UNLOCK(dvp); 113 error = VFS_VGET(dvp->v_mount, ip->chvc->pvno, LK_EXCLUSIVE, 114 vpp); 115 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 116 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 117 vref(dvp); 118 *vpp = dvp; 119 error = 0; 120 } else { 121 fd = chfs_dir_lookup(ip, cnp); 122 123 if (fd == NULL) { 124 dbg("fd null\n"); 125 /* The entry was not found in the directory. 126 * This is OK if we are creating or renaming an 127 * entry and are working on the last component of 128 * the path name. */ 129 if ((cnp->cn_flags & ISLASTCN) && (cnp->cn_nameiop == CREATE 130 || cnp->cn_nameiop == RENAME)) { 131 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 132 if (error) { 133 dbg("after the entry was not found in dir\n"); 134 goto out; 135 } 136 137 dbg("return EJUSTRETURN\n"); 138 error = EJUSTRETURN; 139 } else { 140 error = ENOENT; 141 } 142 } else { 143 /* If we are not at the last path component and 144 * found a non-directory or non-link entry (which 145 * may itself be pointing to a directory), raise 146 * an error. */ 147 if ((fd->type != CHT_DIR && fd->type != CHT_LNK) && !(cnp->cn_flags 148 & ISLASTCN)) { 149 error = ENOTDIR; 150 goto out; 151 } 152 153 dbg("vno@allocating new vnode: %llu\n", 154 (unsigned long long)fd->vno); 155 error = VFS_VGET(dvp->v_mount, fd->vno, LK_EXCLUSIVE, 156 vpp); 157 } 158 } 159 /* Store the result of this lookup in the cache. Avoid this if the 160 * request was for creation, as it does not improve timings on 161 * emprical tests. */ 162 if (cnp->cn_nameiop != CREATE && (cnp->cn_flags & ISDOTDOT) == 0) { 163 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 164 cnp->cn_flags); 165 } 166 167 out: 168 /* If there were no errors, *vpp cannot be NULL. */ 169 KASSERT(IFF(error == 0, *vpp != NULL)); 170 KASSERT(VOP_ISLOCKED(dvp)); 171 172 if (error) 173 return error; 174 if (*vpp != dvp) 175 VOP_UNLOCK(*vpp); 176 return 0; 177 } 178 179 /* --------------------------------------------------------------------- */ 180 181 int 182 chfs_create(void *v) 183 { 184 struct vop_create_v3_args /* { 185 struct vnode *a_dvp; 186 struct vnode **a_vpp; 187 struct componentname *a_cnp; 188 struct vattr *a_vap; 189 } */*ap = v; 190 int error, mode; 191 dbg("create()\n"); 192 193 mode = MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode); 194 195 if ((mode & IFMT) == 0) { 196 if (ap->a_vap->va_type == VREG) 197 mode |= IFREG; 198 if (ap->a_vap->va_type == VSOCK) 199 mode |= IFSOCK; 200 } 201 202 error = chfs_makeinode(mode, ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap->va_type); 203 204 if (error) { 205 dbg("error: %d\n", error); 206 return error; 207 } 208 209 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 210 return 0; 211 } 212 /* --------------------------------------------------------------------- */ 213 214 int 215 chfs_mknod(void *v) 216 { 217 struct vnode *dvp = ((struct vop_mknod_v3_args *) v)->a_dvp; 218 struct vnode **vpp = ((struct vop_mknod_v3_args *) v)->a_vpp; 219 struct componentname *cnp = ((struct vop_mknod_v3_args *) v)->a_cnp; 220 struct vattr *vap = ((struct vop_mknod_v3_args *) v)->a_vap; 221 int mode, err = 0; 222 struct chfs_inode *ip; 223 struct vnode *vp; 224 225 struct ufsmount *ump; 226 struct chfs_mount *chmp; 227 228 struct chfs_full_dnode *fd; 229 struct buf *bp; 230 int len; 231 dbg("mknod()\n"); 232 233 ump = VFSTOUFS(dvp->v_mount); 234 chmp = ump->um_chfs; 235 236 /* Check type of node. */ 237 if (vap->va_type != VBLK && vap->va_type != VCHR && vap->va_type != VFIFO) 238 return EINVAL; 239 240 vp = *vpp; 241 242 mode = MAKEIMODE(vap->va_type, vap->va_mode); 243 244 if ((mode & IFMT) == 0) { 245 switch (vap->va_type) { 246 case VBLK: 247 mode |= IFBLK; 248 break; 249 case VCHR: 250 mode |= IFCHR; 251 break; 252 case VFIFO: 253 mode |= IFIFO; 254 break; 255 default: 256 break; 257 } 258 } 259 260 /* Create a new node. */ 261 err = chfs_makeinode(mode, dvp, &vp, cnp, vap->va_type); 262 263 ip = VTOI(vp); 264 if (vap->va_rdev != VNOVAL) 265 ip->rdev = vap->va_rdev; 266 267 if (vap->va_type == VFIFO) 268 vp->v_op = chfs_fifoop_p; 269 else { 270 vp->v_op = chfs_specop_p; 271 spec_node_init(vp, ip->rdev); 272 } 273 274 if (err) 275 return err; 276 277 /* Device is written out as a data node. */ 278 len = sizeof(dev_t); 279 chfs_set_vnode_size(vp, len); 280 bp = getiobuf(vp, true); 281 bp->b_bufsize = bp->b_resid = len; 282 bp->b_data = kmem_alloc(len, KM_SLEEP); 283 memcpy(bp->b_data, &ip->rdev, len); 284 bp->b_blkno = 0; 285 286 fd = chfs_alloc_full_dnode(); 287 288 mutex_enter(&chmp->chm_lock_mountfields); 289 290 err = chfs_write_flash_dnode(chmp, vp, bp, fd); 291 if (err) { 292 mutex_exit(&chmp->chm_lock_mountfields); 293 kmem_free(bp->b_data, len); 294 return err; 295 } 296 297 /* Add data node to the inode. */ 298 err = chfs_add_full_dnode_to_inode(chmp, ip, fd); 299 if (err) { 300 mutex_exit(&chmp->chm_lock_mountfields); 301 kmem_free(bp->b_data, len); 302 return err; 303 } 304 305 mutex_exit(&chmp->chm_lock_mountfields); 306 307 *vpp = vp; 308 kmem_free(bp->b_data, len); 309 putiobuf(bp); 310 311 return 0; 312 } 313 314 /* --------------------------------------------------------------------- */ 315 316 int 317 chfs_open(void *v) 318 { 319 struct vnode *vp = ((struct vop_open_args *) v)->a_vp; 320 int mode = ((struct vop_open_args *) v)->a_mode; 321 dbg("open()\n"); 322 323 int error; 324 struct chfs_inode *ip; 325 326 KASSERT(VOP_ISLOCKED(vp)); 327 328 ip = VTOI(vp); 329 330 KASSERT(vp->v_size == ip->size); 331 if (ip->chvc->nlink < 1) { 332 error = ENOENT; 333 goto out; 334 } 335 336 /* If the file is marked append-only, deny write requests. */ 337 if (ip->flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 338 error = EPERM; 339 else 340 error = 0; 341 342 out: 343 KASSERT(VOP_ISLOCKED(vp)); 344 return error; 345 } 346 347 /* --------------------------------------------------------------------- */ 348 349 int 350 chfs_close(void *v) 351 { 352 struct vnode *vp = ((struct vop_close_args *) v)->a_vp; 353 dbg("close()\n"); 354 355 struct chfs_inode *ip; 356 357 KASSERT(VOP_ISLOCKED(vp)); 358 359 ip = VTOI(vp); 360 361 if (ip->chvc->nlink > 0) { 362 chfs_update(vp, NULL, NULL, UPDATE_CLOSE); 363 } 364 365 return 0; 366 } 367 368 /* --------------------------------------------------------------------- */ 369 370 int 371 chfs_access(void *v) 372 { 373 struct vnode *vp = ((struct vop_access_args *) v)->a_vp; 374 int mode = ((struct vop_access_args *) v)->a_mode; 375 kauth_cred_t cred = ((struct vop_access_args *) v)->a_cred; 376 377 dbg("access()\n"); 378 struct chfs_inode *ip = VTOI(vp); 379 380 if (mode & VWRITE) { 381 switch (vp->v_type) { 382 case VLNK: 383 case VDIR: 384 case VREG: 385 if (vp->v_mount->mnt_flag & MNT_RDONLY) 386 return (EROFS); 387 break; 388 case VBLK: 389 case VCHR: 390 case VSOCK: 391 case VFIFO: 392 break; 393 default: 394 break; 395 } 396 } 397 398 if (mode & VWRITE && ip->flags & IMMUTABLE) 399 return (EPERM); 400 401 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type, 402 ip->mode & ALLPERMS), vp, NULL, genfs_can_access(vp->v_type, 403 ip->mode & ALLPERMS, ip->uid, ip->gid, mode, cred)); 404 } 405 406 /* --------------------------------------------------------------------- */ 407 408 int 409 chfs_getattr(void *v) 410 { 411 struct vnode *vp = ((struct vop_getattr_args *) v)->a_vp; 412 struct vattr *vap = ((struct vop_getattr_args *) v)->a_vap; 413 414 struct chfs_inode *ip = VTOI(vp); 415 dbg("getattr()\n"); 416 417 KASSERT(vp->v_size == ip->size); 418 419 vattr_null(vap); 420 CHFS_ITIMES(ip, NULL, NULL, NULL); 421 422 vap->va_type = CHTTOVT(ip->ch_type); 423 vap->va_mode = ip->mode & ALLPERMS; 424 vap->va_nlink = ip->chvc->nlink; 425 vap->va_uid = ip->uid; 426 vap->va_gid = ip->gid; 427 vap->va_fsid = ip->dev; 428 vap->va_fileid = ip->ino; 429 vap->va_size = ip->size; 430 vap->va_blocksize = PAGE_SIZE; 431 vap->va_atime.tv_sec = ip->atime; 432 vap->va_atime.tv_nsec = 0; 433 vap->va_mtime.tv_sec = ip->mtime; 434 vap->va_mtime.tv_nsec = 0; 435 vap->va_ctime.tv_sec = ip->ctime; 436 vap->va_ctime.tv_nsec = 0; 437 vap->va_gen = ip->version; 438 vap->va_flags = ip->flags; 439 vap->va_rdev = ip->rdev; 440 vap->va_bytes = round_page(ip->size); 441 vap->va_filerev = VNOVAL; 442 vap->va_vaflags = 0; 443 vap->va_spare = VNOVAL; 444 445 return 0; 446 } 447 448 /* --------------------------------------------------------------------- */ 449 450 /* Note: modelled after tmpfs's same function */ 451 452 int 453 chfs_setattr(void *v) 454 { 455 struct vnode *vp = ((struct vop_setattr_args *) v)->a_vp; 456 struct vattr *vap = ((struct vop_setattr_args *) v)->a_vap; 457 kauth_cred_t cred = ((struct vop_setattr_args *) v)->a_cred; 458 459 struct chfs_inode *ip; 460 struct ufsmount *ump = VFSTOUFS(vp->v_mount); 461 struct chfs_mount *chmp = ump->um_chfs; 462 int error = 0; 463 464 dbg("setattr()\n"); 465 466 KASSERT(VOP_ISLOCKED(vp)); 467 ip = VTOI(vp); 468 469 /* Abort if any unsettable attribute is given. */ 470 if (vap->va_type != VNON || vap->va_nlink != VNOVAL || 471 vap->va_fsid != VNOVAL || vap->va_fileid != VNOVAL || 472 vap->va_blocksize != VNOVAL /*|| GOODTIME(&vap->va_ctime)*/ || 473 vap->va_gen != VNOVAL || vap->va_rdev != VNOVAL || 474 vap->va_bytes != VNOVAL) { 475 return EINVAL; 476 } 477 478 /* set flags */ 479 if (error == 0 && (vap->va_flags != VNOVAL)) { 480 error = chfs_chflags(vp, vap->va_flags, cred); 481 return error; 482 } 483 484 if (ip->flags & (IMMUTABLE | APPEND)) { 485 error = EPERM; 486 return error; 487 } 488 489 /* set size */ 490 if (error == 0 && (vap->va_size != VNOVAL)) { 491 error = chfs_chsize(vp, vap->va_size, cred); 492 if (error) 493 return error; 494 } 495 496 /* set owner */ 497 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 498 error = chfs_chown(vp, vap->va_uid, vap->va_gid, cred); 499 if (error) 500 return error; 501 } 502 503 /* set mode */ 504 if (error == 0 && (vap->va_mode != VNOVAL)) { 505 error = chfs_chmod(vp, vap->va_mode, cred); 506 if (error) 507 return error; 508 } 509 510 /* set time */ 511 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 512 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 513 NULL, genfs_can_chtimes(vp, vap->va_vaflags, ip->uid, cred)); 514 if (error) 515 return error; 516 if (vap->va_atime.tv_sec != VNOVAL) 517 ip->iflag |= IN_ACCESS; 518 if (vap->va_mtime.tv_sec != VNOVAL) 519 ip->iflag |= IN_CHANGE | IN_UPDATE; 520 error = chfs_update(vp, 521 &vap->va_atime, &vap->va_mtime, UPDATE_WAIT); 522 if (error) 523 return error; 524 } 525 526 /* Write it out. */ 527 mutex_enter(&chmp->chm_lock_mountfields); 528 error = chfs_write_flash_vnode(chmp, ip, ALLOC_NORMAL); 529 mutex_exit(&chmp->chm_lock_mountfields); 530 531 return error; 532 } 533 534 int 535 chfs_chmod(struct vnode *vp, int mode, kauth_cred_t cred) 536 { 537 struct chfs_inode *ip = VTOI(vp); 538 int error; 539 dbg("chmod\n"); 540 541 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 542 NULL, genfs_can_chmod(vp->v_type, cred, ip->uid, ip->gid, mode)); 543 if (error) 544 return error; 545 ip->mode &= ~ALLPERMS; 546 ip->mode |= (mode & ALLPERMS); 547 ip->iflag |= IN_CHANGE; 548 549 error = chfs_update(vp, NULL, NULL, UPDATE_WAIT); 550 if (error) 551 return error; 552 553 return 0; 554 } 555 556 int 557 chfs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred) 558 { 559 struct chfs_inode *ip = VTOI(vp); 560 int error; 561 dbg("chown\n"); 562 563 if (uid == (uid_t)VNOVAL) 564 uid = ip->uid; 565 if (gid == (gid_t)VNOVAL) 566 gid = ip->gid; 567 568 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, vp, 569 NULL, genfs_can_chown(cred, ip->uid, ip->gid, uid, gid)); 570 if (error) 571 return error; 572 573 ip->gid = gid; 574 ip->uid = uid; 575 ip->iflag |= IN_CHANGE; 576 577 error = chfs_update(vp, NULL, NULL, UPDATE_WAIT); 578 if (error) 579 return error; 580 581 return 0; 582 } 583 584 585 /* --------------------------------------------------------------------- */ 586 /* calculates ((off_t)blk * chmp->chm_chm_fs_bsize) */ 587 #define chfs_lblktosize(chmp, blk) \ 588 (((off_t)(blk)) << (chmp)->chm_fs_bshift) 589 590 /* calculates (loc % chmp->chm_chm_fs_bsize) */ 591 #define chfs_blkoff(chmp, loc) \ 592 ((loc) & (chmp)->chm_fs_qbmask) 593 594 /* calculates (loc / chmp->chm_chm_fs_bsize) */ 595 #define chfs_lblkno(chmp, loc) \ 596 ((loc) >> (chmp)->chm_fs_bshift) 597 598 /* calculates roundup(size, chmp->chm_chm_fs_fsize) */ 599 #define chfs_fragroundup(chmp, size) \ 600 (((size) + (chmp)->chm_fs_qfmask) & (chmp)->chm_fs_fmask) 601 602 #define chfs_blksize(chmp, ip, lbn) \ 603 (((lbn) >= UFS_NDADDR || (ip)->size >= chfs_lblktosize(chmp, (lbn) + 1)) \ 604 ? (chmp)->chm_fs_bsize \ 605 : (chfs_fragroundup(chmp, chfs_blkoff(chmp, (ip)->size)))) 606 607 /* calculates roundup(size, chmp->chm_chm_fs_bsize) */ 608 #define chfs_blkroundup(chmp, size) \ 609 (((size) + (chmp)->chm_fs_qbmask) & (chmp)->chm_fs_bmask) 610 611 /* from ffs read */ 612 int 613 chfs_read(void *v) 614 { 615 struct vop_read_args /* { 616 struct vnode *a_vp; 617 struct uio *a_uio; 618 int a_ioflag; 619 kauth_cred_t a_cred; 620 } */ *ap = v; 621 struct vnode *vp; 622 struct chfs_inode *ip; 623 struct uio *uio; 624 struct ufsmount *ump; 625 struct buf *bp; 626 struct chfs_mount *chmp; 627 daddr_t lbn, nextlbn; 628 off_t bytesinfile; 629 long size, xfersize, blkoffset; 630 int error, ioflag; 631 vsize_t bytelen; 632 bool usepc = false; 633 634 dbg("chfs_read\n"); 635 636 vp = ap->a_vp; 637 ip = VTOI(vp); 638 ump = ip->ump; 639 uio = ap->a_uio; 640 ioflag = ap->a_ioflag; 641 error = 0; 642 643 dbg("ip->size:%llu\n", (unsigned long long)ip->size); 644 645 #ifdef DIAGNOSTIC 646 if (uio->uio_rw != UIO_READ) 647 panic("%s: mode", READ_S); 648 649 if (vp->v_type == VLNK) { 650 if (ip->size < ump->um_maxsymlinklen) 651 panic("%s: short symlink", READ_S); 652 } else if (vp->v_type != VREG && vp->v_type != VDIR) 653 panic("%s: type %d", READ_S, vp->v_type); 654 #endif 655 chmp = ip->chmp; 656 if ((u_int64_t)uio->uio_offset > ump->um_maxfilesize) 657 return (EFBIG); 658 if (uio->uio_resid == 0) 659 return (0); 660 661 if (uio->uio_offset >= ip->size) 662 goto out; 663 664 usepc = vp->v_type == VREG; 665 bytelen = 0; 666 if (usepc) { 667 const int advice = IO_ADV_DECODE(ap->a_ioflag); 668 669 while (uio->uio_resid > 0) { 670 if (ioflag & IO_DIRECT) { 671 genfs_directio(vp, uio, ioflag); 672 } 673 bytelen = MIN(ip->size - uio->uio_offset, 674 uio->uio_resid); 675 if (bytelen == 0) 676 break; 677 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 678 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 679 if (error) 680 break; 681 682 } 683 goto out; 684 } 685 686 dbg("start reading\n"); 687 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) { 688 bytesinfile = ip->size - uio->uio_offset; 689 if (bytesinfile <= 0) 690 break; 691 lbn = chfs_lblkno(chmp, uio->uio_offset); 692 nextlbn = lbn + 1; 693 size = chfs_blksize(chmp, ip, lbn); 694 blkoffset = chfs_blkoff(chmp, uio->uio_offset); 695 xfersize = MIN(MIN(chmp->chm_fs_bsize - blkoffset, uio->uio_resid), 696 bytesinfile); 697 698 if (chfs_lblktosize(chmp, nextlbn) >= ip->size) { 699 error = bread(vp, lbn, size, 0, &bp); 700 dbg("after bread\n"); 701 } else { 702 int nextsize = chfs_blksize(chmp, ip, nextlbn); 703 dbg("size: %ld\n", size); 704 error = breadn(vp, lbn, 705 size, &nextlbn, &nextsize, 1, 0, &bp); 706 dbg("after breadN\n"); 707 } 708 if (error) 709 break; 710 711 /* 712 * We should only get non-zero b_resid when an I/O error 713 * has occurred, which should cause us to break above. 714 * However, if the short read did not cause an error, 715 * then we want to ensure that we do not uiomove bad 716 * or uninitialized data. 717 */ 718 size -= bp->b_resid; 719 if (size < xfersize) { 720 if (size == 0) 721 break; 722 xfersize = size; 723 } 724 dbg("uiomove\n"); 725 error = uiomove((char *)bp->b_data + blkoffset, xfersize, uio); 726 if (error) 727 break; 728 brelse(bp, 0); 729 } 730 731 if (bp != NULL) 732 brelse(bp, 0); 733 734 out: 735 // FIXME HACK 736 ip->ino = ip->chvc->vno; 737 738 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 739 ip->iflag |= IN_ACCESS; 740 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) { 741 if (error) { 742 return error; 743 } 744 error = chfs_update(vp, NULL, NULL, UPDATE_WAIT); 745 } 746 } 747 748 dbg("[END]\n"); 749 750 return (error); 751 } 752 753 754 /* --------------------------------------------------------------------- */ 755 756 /* from ffs write */ 757 int 758 chfs_write(void *v) 759 { 760 struct vop_write_args /* { 761 struct vnode *a_vp; 762 struct uio *a_uio; 763 int a_ioflag; 764 kauth_cred_t a_cred; 765 } */ *ap = v; 766 struct vnode *vp ; 767 struct uio *uio; 768 struct chfs_inode *ip; 769 struct chfs_mount *chmp; 770 struct lwp *l; 771 kauth_cred_t cred; 772 off_t osize, origoff, oldoff, preallocoff, endallocoff, nsize; 773 int blkoffset, error, flags, ioflag, resid; 774 int aflag; 775 int extended=0; 776 vsize_t bytelen; 777 bool async; 778 struct ufsmount *ump; 779 780 781 cred = ap->a_cred; 782 ioflag = ap->a_ioflag; 783 uio = ap->a_uio; 784 vp = ap->a_vp; 785 ip = VTOI(vp); 786 ump = ip->ump; 787 788 dbg("write\n"); 789 790 KASSERT(vp->v_size == ip->size); 791 792 switch (vp->v_type) { 793 case VREG: 794 if (ioflag & IO_APPEND) 795 uio->uio_offset = ip->size; 796 if ((ip->flags & APPEND) && uio->uio_offset != ip->size) 797 return (EPERM); 798 /* FALLTHROUGH */ 799 case VLNK: 800 break; 801 case VDIR: 802 if ((ioflag & IO_SYNC) == 0) 803 panic("chfs_write: nonsync dir write"); 804 break; 805 default: 806 panic("chfs_write: type"); 807 } 808 809 chmp = ip->chmp; 810 if (uio->uio_offset < 0 || 811 (u_int64_t)uio->uio_offset + 812 uio->uio_resid > ump->um_maxfilesize) { 813 dbg("uio->uio_offset = %lld | uio->uio_offset + " 814 "uio->uio_resid (%llu) > ump->um_maxfilesize (%lld)\n", 815 (long long)uio->uio_offset, 816 (uint64_t)uio->uio_offset + uio->uio_resid, 817 (long long)ump->um_maxfilesize); 818 return (EFBIG); 819 } 820 /* 821 * Maybe this should be above the vnode op call, but so long as 822 * file servers have no limits, I don't think it matters. 823 */ 824 l = curlwp; 825 if (vp->v_type == VREG && l && 826 uio->uio_offset + uio->uio_resid > 827 l->l_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 828 mutex_enter(proc_lock); 829 psignal(l->l_proc, SIGXFSZ); 830 mutex_exit(proc_lock); 831 return (EFBIG); 832 } 833 if (uio->uio_resid == 0) 834 return (0); 835 836 flags = ioflag & IO_SYNC ? B_SYNC : 0; 837 async = vp->v_mount->mnt_flag & MNT_ASYNC; 838 origoff = uio->uio_offset; 839 resid = uio->uio_resid; 840 osize = ip->size; 841 error = 0; 842 843 preallocoff = round_page(chfs_blkroundup(chmp, 844 MAX(osize, uio->uio_offset))); 845 aflag = ioflag & IO_SYNC ? B_SYNC : 0; 846 nsize = MAX(osize, uio->uio_offset + uio->uio_resid); 847 endallocoff = nsize - chfs_blkoff(chmp, nsize); 848 849 /* 850 * if we're increasing the file size, deal with expanding 851 * the fragment if there is one. 852 */ 853 854 if (nsize > osize && chfs_lblkno(chmp, osize) < UFS_NDADDR && 855 chfs_lblkno(chmp, osize) != chfs_lblkno(chmp, nsize) && 856 chfs_blkroundup(chmp, osize) != osize) { 857 off_t eob; 858 859 eob = chfs_blkroundup(chmp, osize); 860 uvm_vnp_setwritesize(vp, eob); 861 error = ufs_balloc_range(vp, osize, eob - osize, cred, aflag); 862 if (error) 863 goto out; 864 if (flags & B_SYNC) { 865 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 866 VOP_PUTPAGES(vp, 867 trunc_page(osize & chmp->chm_fs_bmask), 868 round_page(eob), 869 PGO_CLEANIT | PGO_SYNCIO | PGO_JOURNALLOCKED); 870 } 871 } 872 873 while (uio->uio_resid > 0) { 874 int ubc_flags = UBC_WRITE; 875 bool overwrite; /* if we're overwrite a whole block */ 876 off_t newoff; 877 878 if (ioflag & IO_DIRECT) { 879 genfs_directio(vp, uio, ioflag | IO_JOURNALLOCKED); 880 } 881 882 oldoff = uio->uio_offset; 883 blkoffset = chfs_blkoff(chmp, uio->uio_offset); 884 bytelen = MIN(chmp->chm_fs_bsize - blkoffset, uio->uio_resid); 885 if (bytelen == 0) { 886 break; 887 } 888 889 /* 890 * if we're filling in a hole, allocate the blocks now and 891 * initialize the pages first. if we're extending the file, 892 * we can safely allocate blocks without initializing pages 893 * since the new blocks will be inaccessible until the write 894 * is complete. 895 */ 896 overwrite = uio->uio_offset >= preallocoff && 897 uio->uio_offset < endallocoff; 898 if (!overwrite && (vp->v_vflag & VV_MAPPED) == 0 && 899 chfs_blkoff(chmp, uio->uio_offset) == 0 && 900 (uio->uio_offset & PAGE_MASK) == 0) { 901 vsize_t len; 902 903 len = trunc_page(bytelen); 904 len -= chfs_blkoff(chmp, len); 905 if (len > 0) { 906 overwrite = true; 907 bytelen = len; 908 } 909 } 910 911 newoff = oldoff + bytelen; 912 if (vp->v_size < newoff) { 913 uvm_vnp_setwritesize(vp, newoff); 914 } 915 916 if (!overwrite) { 917 error = ufs_balloc_range(vp, uio->uio_offset, bytelen, 918 cred, aflag); 919 if (error) 920 break; 921 } else { 922 genfs_node_wrlock(vp); 923 error = GOP_ALLOC(vp, uio->uio_offset, bytelen, 924 aflag, cred); 925 genfs_node_unlock(vp); 926 if (error) 927 break; 928 ubc_flags |= UBC_FAULTBUSY; 929 } 930 931 /* 932 * copy the data. 933 */ 934 935 ubc_flags |= UBC_VNODE_FLAGS(vp); 936 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 937 IO_ADV_DECODE(ioflag), ubc_flags); 938 939 /* 940 * update UVM's notion of the size now that we've 941 * copied the data into the vnode's pages. 942 * 943 * we should update the size even when uiomove failed. 944 */ 945 946 if (vp->v_size < newoff) { 947 uvm_vnp_setsize(vp, newoff); 948 extended = 1; 949 } 950 951 if (error) 952 break; 953 954 /* 955 * flush what we just wrote if necessary. 956 * XXXUBC simplistic async flushing. 957 */ 958 959 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 960 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 961 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 962 (uio->uio_offset >> 16) << 16, 963 PGO_CLEANIT | PGO_JOURNALLOCKED); 964 if (error) 965 break; 966 } 967 } 968 out: 969 if (error == 0 && ioflag & IO_SYNC) { 970 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 971 error = VOP_PUTPAGES(vp, 972 trunc_page(origoff & chmp->chm_fs_bmask), 973 round_page(chfs_blkroundup(chmp, uio->uio_offset)), 974 PGO_CLEANIT | PGO_SYNCIO | PGO_JOURNALLOCKED); 975 } 976 ip->iflag |= IN_CHANGE | IN_UPDATE; 977 if (resid > uio->uio_resid && ap->a_cred) { 978 if (ip->mode & ISUID) { 979 if (kauth_authorize_vnode(ap->a_cred, 980 KAUTH_VNODE_RETAIN_SUID, vp, NULL, EPERM) != 0) 981 ip->mode &= ~ISUID; 982 } 983 984 if (ip->mode & ISGID) { 985 if (kauth_authorize_vnode(ap->a_cred, 986 KAUTH_VNODE_RETAIN_SGID, vp, NULL, EPERM) != 0) 987 ip->mode &= ~ISGID; 988 } 989 } 990 if (resid > uio->uio_resid) 991 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 992 if (error) { 993 (void) UFS_TRUNCATE(vp, osize, ioflag & IO_SYNC, ap->a_cred); 994 uio->uio_offset -= resid - uio->uio_resid; 995 uio->uio_resid = resid; 996 } else if (resid > uio->uio_resid && (ioflag & IO_SYNC) == IO_SYNC) 997 error = UFS_UPDATE(vp, NULL, NULL, UPDATE_WAIT); 998 999 //FIXME HACK 1000 chfs_set_vnode_size(vp, vp->v_size); 1001 1002 1003 KASSERT(vp->v_size == ip->size); 1004 1005 mutex_enter(&chmp->chm_lock_mountfields); 1006 error = chfs_write_flash_vnode(chmp, ip, ALLOC_NORMAL); 1007 mutex_exit(&chmp->chm_lock_mountfields); 1008 1009 return (error); 1010 } 1011 1012 1013 /* --------------------------------------------------------------------- */ 1014 1015 int 1016 chfs_fsync(void *v) 1017 { 1018 struct vop_fsync_args /* { 1019 struct vnode *a_vp; 1020 kauth_cred_t a_cred; 1021 int a_flags; 1022 off_t offlo; 1023 off_t offhi; 1024 } */ *ap = v; 1025 struct vnode *vp = ap->a_vp; 1026 1027 if (ap->a_flags & FSYNC_CACHE) { 1028 return ENODEV; 1029 } 1030 vflushbuf(vp, ap->a_flags); 1031 1032 return 0; 1033 } 1034 1035 /* --------------------------------------------------------------------- */ 1036 1037 int 1038 chfs_remove(void *v) 1039 { 1040 struct vnode *dvp = ((struct vop_remove_v2_args *) v)->a_dvp; 1041 struct vnode *vp = ((struct vop_remove_v2_args *) v)->a_vp; 1042 struct componentname *cnp = (((struct vop_remove_v2_args *) v)->a_cnp); 1043 dbg("remove\n"); 1044 1045 KASSERT(VOP_ISLOCKED(dvp)); 1046 KASSERT(VOP_ISLOCKED(vp)); 1047 1048 struct chfs_inode *ip = VTOI(vp); 1049 struct chfs_inode *parent = VTOI(dvp); 1050 int error = 0; 1051 1052 if (vp->v_type == VDIR || (ip->flags & (IMMUTABLE | APPEND)) || 1053 (parent->flags & APPEND)) { 1054 error = EPERM; 1055 goto out; 1056 } 1057 1058 KASSERT(ip->chvc->vno != ip->chvc->pvno); 1059 1060 error = chfs_do_unlink(ip, 1061 parent, cnp->cn_nameptr, cnp->cn_namelen); 1062 1063 out: 1064 vput(vp); 1065 1066 return error; 1067 } 1068 1069 /* --------------------------------------------------------------------- */ 1070 1071 int 1072 chfs_link(void *v) 1073 { 1074 struct vnode *dvp = ((struct vop_link_v2_args *) v)->a_dvp; 1075 struct vnode *vp = ((struct vop_link_v2_args *) v)->a_vp; 1076 struct componentname *cnp = ((struct vop_link_v2_args *) v)->a_cnp; 1077 1078 struct chfs_inode *ip, *parent; 1079 int error = 0; 1080 1081 if (vp->v_type == VDIR) { 1082 VOP_ABORTOP(dvp, cnp); 1083 error = EISDIR; 1084 goto out; 1085 } 1086 if (dvp->v_mount != vp->v_mount) { 1087 VOP_ABORTOP(dvp, cnp); 1088 error = EXDEV; 1089 goto out; 1090 } 1091 if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { 1092 VOP_ABORTOP(dvp, cnp); 1093 goto out; 1094 } 1095 1096 parent = VTOI(dvp); 1097 ip = VTOI(vp); 1098 1099 error = chfs_do_link(ip, 1100 parent, cnp->cn_nameptr, cnp->cn_namelen, ip->ch_type); 1101 1102 if (dvp != vp) 1103 VOP_UNLOCK(vp); 1104 out: 1105 return error; 1106 } 1107 1108 /* --------------------------------------------------------------------- */ 1109 1110 int 1111 chfs_rename(void *v) 1112 { 1113 struct vnode *fdvp = ((struct vop_rename_args *) v)->a_fdvp; 1114 struct vnode *fvp = ((struct vop_rename_args *) v)->a_fvp; 1115 struct componentname *fcnp = ((struct vop_rename_args *) v)->a_fcnp; 1116 struct vnode *tdvp = ((struct vop_rename_args *) v)->a_tdvp; 1117 struct vnode *tvp = ((struct vop_rename_args *) v)->a_tvp; 1118 struct componentname *tcnp = ((struct vop_rename_args *) v)->a_tcnp; 1119 1120 struct chfs_inode *oldparent, *old; 1121 struct chfs_inode *newparent; 1122 struct chfs_dirent *fd; 1123 struct chfs_inode *ip; 1124 int error = 0; 1125 dbg("rename\n"); 1126 1127 KASSERT(VOP_ISLOCKED(tdvp)); 1128 KASSERT(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp) == LK_EXCLUSIVE)); 1129 1130 oldparent = VTOI(fdvp); 1131 old = VTOI(fvp); 1132 newparent = VTOI(tdvp); 1133 if (tvp) { 1134 dbg("tvp not null\n"); 1135 ip = VTOI(tvp); 1136 if (tvp->v_type == VDIR) { 1137 TAILQ_FOREACH(fd, &ip->dents, fds) { 1138 if (fd->vno) { 1139 error = ENOTEMPTY; 1140 goto out_unlocked; 1141 } 1142 } 1143 } 1144 error = chfs_do_unlink(ip, 1145 newparent, tcnp->cn_nameptr, tcnp->cn_namelen); 1146 vput(tvp); 1147 } 1148 VFS_VGET(tdvp->v_mount, old->ino, LK_EXCLUSIVE, &tvp); 1149 ip = VTOI(tvp); 1150 1151 /* link new */ 1152 error = chfs_do_link(ip, 1153 newparent, tcnp->cn_nameptr, tcnp->cn_namelen, ip->ch_type); 1154 /* remove old */ 1155 error = chfs_do_unlink(old, 1156 oldparent, fcnp->cn_nameptr, fcnp->cn_namelen); 1157 1158 out_unlocked: 1159 /* Release target nodes. */ 1160 if (tdvp == tvp) 1161 vrele(tdvp); 1162 else 1163 vput(tdvp); 1164 if (tvp != NULL) 1165 vput(tvp); 1166 1167 /* Release source nodes. */ 1168 vrele(fdvp); 1169 vrele(fvp); 1170 1171 return error; 1172 } 1173 1174 /* --------------------------------------------------------------------- */ 1175 1176 int 1177 chfs_mkdir(void *v) 1178 { 1179 struct vnode *dvp = ((struct vop_mkdir_v3_args *) v)->a_dvp; 1180 struct vnode **vpp = ((struct vop_mkdir_v3_args *)v)->a_vpp; 1181 struct componentname *cnp = ((struct vop_mkdir_v3_args *) v)->a_cnp; 1182 struct vattr *vap = ((struct vop_mkdir_v3_args *) v)->a_vap; 1183 dbg("mkdir()\n"); 1184 1185 int mode; 1186 1187 mode = vap->va_mode & ACCESSPERMS; 1188 if ((mode & IFMT) == 0) { 1189 mode |= IFDIR; 1190 } 1191 1192 KASSERT(vap->va_type == VDIR); 1193 1194 return chfs_makeinode(mode, dvp, vpp, cnp, VDIR); 1195 } 1196 1197 /* --------------------------------------------------------------------- */ 1198 1199 int 1200 chfs_rmdir(void *v) 1201 { 1202 struct vnode *dvp = ((struct vop_rmdir_v2_args *) v)->a_dvp; 1203 struct vnode *vp = ((struct vop_rmdir_v2_args *) v)->a_vp; 1204 struct componentname *cnp = ((struct vop_rmdir_v2_args *) v)->a_cnp; 1205 dbg("rmdir()\n"); 1206 1207 KASSERT(VOP_ISLOCKED(dvp)); 1208 KASSERT(VOP_ISLOCKED(vp)); 1209 1210 struct chfs_inode *ip = VTOI(vp); 1211 struct chfs_inode *parent = VTOI(dvp); 1212 struct chfs_dirent *fd; 1213 int error = 0; 1214 1215 if (vp->v_type != VDIR) { 1216 error = ENOTDIR; 1217 goto out; 1218 } 1219 1220 KASSERT(ip->chvc->vno != ip->chvc->pvno); 1221 1222 TAILQ_FOREACH(fd, &ip->dents, fds) { 1223 if (fd->vno) { 1224 error = ENOTEMPTY; 1225 goto out; 1226 } 1227 } 1228 1229 error = chfs_do_unlink(ip, 1230 parent, cnp->cn_nameptr, cnp->cn_namelen); 1231 1232 out: 1233 vput(vp); 1234 1235 return error; 1236 } 1237 1238 /* --------------------------------------------------------------------- */ 1239 1240 int 1241 chfs_symlink(void *v) 1242 { 1243 struct vnode *dvp = ((struct vop_symlink_v3_args *) v)->a_dvp; 1244 struct vnode **vpp = ((struct vop_symlink_v3_args *) v)->a_vpp; 1245 struct componentname *cnp = ((struct vop_symlink_v3_args *) v)->a_cnp; 1246 struct vattr *vap = ((struct vop_symlink_v3_args *) v)->a_vap; 1247 char *target = ((struct vop_symlink_v3_args *) v)->a_target; 1248 1249 struct ufsmount *ump; 1250 struct chfs_mount *chmp; 1251 struct vnode *vp; 1252 struct chfs_inode *ip; 1253 int len, err; 1254 struct chfs_full_dnode *fd; 1255 struct buf *bp; 1256 dbg("symlink()\n"); 1257 1258 ump = VFSTOUFS(dvp->v_mount); 1259 chmp = ump->um_chfs; 1260 1261 err = chfs_makeinode(IFLNK | vap->va_mode, dvp, vpp, cnp, VLNK); 1262 if (err) 1263 return (err); 1264 VN_KNOTE(dvp, NOTE_WRITE); 1265 vp = *vpp; 1266 len = strlen(target); 1267 ip = VTOI(vp); 1268 /* TODO max symlink len instead of "100" */ 1269 if (len < 100) { 1270 /* symlink path stored as a data node */ 1271 ip->target = kmem_alloc(len, KM_SLEEP); 1272 memcpy(ip->target, target, len); 1273 chfs_set_vnode_size(vp, len); 1274 ip->iflag |= IN_CHANGE | IN_UPDATE; 1275 1276 bp = getiobuf(vp, true); 1277 bp->b_bufsize = bp->b_resid = len; 1278 bp->b_data = kmem_alloc(len, KM_SLEEP); 1279 memcpy(bp->b_data, target, len); 1280 bp->b_blkno = 0; 1281 1282 fd = chfs_alloc_full_dnode(); 1283 1284 mutex_enter(&chmp->chm_lock_mountfields); 1285 1286 /* write out the data node */ 1287 err = chfs_write_flash_dnode(chmp, vp, bp, fd); 1288 if (err) { 1289 mutex_exit(&chmp->chm_lock_mountfields); 1290 goto out; 1291 } 1292 1293 /* add it to the inode */ 1294 err = chfs_add_full_dnode_to_inode(chmp, ip, fd); 1295 if (err) { 1296 mutex_exit(&chmp->chm_lock_mountfields); 1297 goto out; 1298 } 1299 1300 mutex_exit(&chmp->chm_lock_mountfields); 1301 1302 kmem_free(bp->b_data, len); 1303 putiobuf(bp); 1304 1305 uvm_vnp_setsize(vp, len); 1306 } else { 1307 err = ufs_bufio(UIO_WRITE, vp, target, len, (off_t)0, 1308 IO_NODELOCKED, cnp->cn_cred, (size_t *)0, NULL); 1309 } 1310 1311 out: 1312 if (err) 1313 vrele(vp); 1314 1315 return (err); 1316 } 1317 1318 /* --------------------------------------------------------------------- */ 1319 1320 int 1321 chfs_readdir(void *v) 1322 { 1323 struct vnode *vp = ((struct vop_readdir_args *) v)->a_vp; 1324 struct uio *uio = ((struct vop_readdir_args *) v)->a_uio; 1325 int *eofflag = ((struct vop_readdir_args *) v)->a_eofflag; 1326 1327 int error = 0; 1328 off_t skip, offset; 1329 struct chfs_inode *ip; 1330 struct chfs_dirent *fd; 1331 1332 struct ufsmount *ump; 1333 struct chfs_mount *chmp; 1334 struct chfs_vnode_cache *chvc; 1335 1336 KASSERT(VOP_ISLOCKED(vp)); 1337 1338 /* This operation only makes sense on directory nodes. */ 1339 if (vp->v_type != VDIR) { 1340 error = ENOTDIR; 1341 goto out; 1342 } 1343 1344 ip = VTOI(vp); 1345 1346 /* uiomove in chfs_filldir automatically increments the 1347 * uio_offset by an arbitrary size, so we discard any change 1348 * to uio_offset and set it to our own value on return 1349 */ 1350 offset = uio->uio_offset; 1351 1352 /* Add this entry. */ 1353 if (offset == CHFS_OFFSET_DOT) { 1354 error = chfs_filldir(uio, ip->ino, ".", 1, CHT_DIR); 1355 if (error == -1) { 1356 error = 0; 1357 goto outok; 1358 } else if (error != 0) 1359 goto outok; 1360 1361 offset = CHFS_OFFSET_DOTDOT; 1362 } 1363 1364 /* Add parent entry. */ 1365 if (offset == CHFS_OFFSET_DOTDOT) { 1366 ump = VFSTOUFS(vp->v_mount); 1367 chmp = ump->um_chfs; 1368 mutex_enter(&chmp->chm_lock_vnocache); 1369 chvc = chfs_vnode_cache_get(chmp, ip->ino); 1370 mutex_exit(&chmp->chm_lock_vnocache); 1371 1372 error = chfs_filldir(uio, chvc->pvno, "..", 2, CHT_DIR); 1373 if (error == -1) { 1374 error = 0; 1375 goto outok; 1376 } else if (error != 0) { 1377 goto outok; 1378 } 1379 1380 /* Has child or not? */ 1381 if (TAILQ_EMPTY(&ip->dents)) { 1382 offset = CHFS_OFFSET_EOF; 1383 } else { 1384 offset = CHFS_OFFSET_FIRST; 1385 } 1386 } 1387 1388 if (offset != CHFS_OFFSET_EOF) { 1389 /* Child entries. */ 1390 skip = offset - CHFS_OFFSET_FIRST; 1391 1392 TAILQ_FOREACH(fd, &ip->dents, fds) { 1393 /* seek to offset by skipping items */ 1394 /* XXX race conditions by changed dirent? */ 1395 if (skip > 0) { 1396 skip--; 1397 continue; 1398 } 1399 1400 if (fd->vno != 0) { 1401 error = chfs_filldir(uio, fd->vno, 1402 fd->name, fd->nsize, fd->type); 1403 if (error == -1) { 1404 error = 0; 1405 goto outok; 1406 } else if (error != 0) { 1407 dbg("err %d\n", error); 1408 goto outok; 1409 } 1410 } 1411 offset++; 1412 } 1413 } 1414 offset = CHFS_OFFSET_EOF; 1415 1416 outok: 1417 uio->uio_offset = offset; 1418 1419 if (eofflag != NULL) { 1420 *eofflag = (error == 0 && 1421 uio->uio_offset == CHFS_OFFSET_EOF); 1422 } 1423 1424 out: 1425 KASSERT(VOP_ISLOCKED(vp)); 1426 1427 return error; 1428 } 1429 1430 /* --------------------------------------------------------------------- */ 1431 1432 int 1433 chfs_readlink(void *v) 1434 { 1435 1436 struct vnode *vp = ((struct vop_readlink_args *) v)->a_vp; 1437 struct uio *uio = ((struct vop_readlink_args *) v)->a_uio; 1438 kauth_cred_t cred = ((struct vop_readlink_args *) v)->a_cred; 1439 1440 struct chfs_inode *ip = VTOI(vp); 1441 1442 dbg("readlink()\n"); 1443 1444 /* TODO max symlink len instead of "100" */ 1445 if (ip->size < 100) { 1446 uiomove(ip->target, ip->size, uio); 1447 return (0); 1448 } 1449 1450 return (UFS_BUFRD(vp, uio, 0, cred)); 1451 } 1452 1453 /* --------------------------------------------------------------------- */ 1454 1455 int 1456 chfs_inactive(void *v) 1457 { 1458 struct vnode *vp = ((struct vop_inactive_v2_args *) v)->a_vp; 1459 struct chfs_inode *ip = VTOI(vp); 1460 struct chfs_vnode_cache *chvc; 1461 dbg("inactive | vno: %llu\n", (unsigned long long)ip->ino); 1462 1463 KASSERT(VOP_ISLOCKED(vp)); 1464 1465 /* Reclaim only if there is no link to the node. */ 1466 if (ip->ino) { 1467 chvc = ip->chvc; 1468 if (chvc->nlink) 1469 *((struct vop_inactive_v2_args *) v)->a_recycle = 0; 1470 } else { 1471 *((struct vop_inactive_v2_args *) v)->a_recycle = 1; 1472 } 1473 1474 return 0; 1475 } 1476 1477 /* --------------------------------------------------------------------- */ 1478 1479 int 1480 chfs_reclaim(void *v) 1481 { 1482 struct vop_reclaim_v2_args *ap = v; 1483 struct vnode *vp = ap->a_vp; 1484 struct chfs_inode *ip = VTOI(vp); 1485 struct chfs_mount *chmp = ip->chmp; 1486 struct chfs_dirent *fd; 1487 1488 VOP_UNLOCK(vp); 1489 1490 mutex_enter(&chmp->chm_lock_mountfields); 1491 1492 mutex_enter(&chmp->chm_lock_vnocache); 1493 ip->chvc->state = VNO_STATE_CHECKEDABSENT; 1494 mutex_exit(&chmp->chm_lock_vnocache); 1495 1496 chfs_update(vp, NULL, NULL, UPDATE_CLOSE); 1497 1498 /* Clean fragments. */ 1499 chfs_kill_fragtree(chmp, &ip->fragtree); 1500 1501 /* Clean dirents. */ 1502 fd = TAILQ_FIRST(&ip->dents); 1503 while (fd) { 1504 TAILQ_REMOVE(&ip->dents, fd, fds); 1505 chfs_free_dirent(fd); 1506 fd = TAILQ_FIRST(&ip->dents); 1507 } 1508 1509 cache_purge(vp); 1510 if (ip->devvp) { 1511 vrele(ip->devvp); 1512 ip->devvp = 0; 1513 } 1514 1515 genfs_node_destroy(vp); 1516 pool_put(&chfs_inode_pool, vp->v_data); 1517 vp->v_data = NULL; 1518 1519 mutex_exit(&chmp->chm_lock_mountfields); 1520 1521 return (0); 1522 } 1523 1524 /* --------------------------------------------------------------------- */ 1525 1526 int 1527 chfs_advlock(void *v) 1528 { 1529 return 0; 1530 } 1531 1532 /* --------------------------------------------------------------------- */ 1533 int 1534 chfs_strategy(void *v) 1535 { 1536 struct vop_strategy_args /* { 1537 const struct vnodeop_desc *a_desc; 1538 struct vnode *a_vp; 1539 struct buf *a_bp; 1540 } */ *ap = v; 1541 struct chfs_full_dnode *fd; 1542 struct buf *bp = ap->a_bp; 1543 struct vnode *vp = ap->a_vp; 1544 struct chfs_inode *ip = VTOI(vp); 1545 struct chfs_mount *chmp = ip->chmp; 1546 int read = (bp->b_flags & B_READ) ? 1 : 0; 1547 int err = 0; 1548 1549 if (read) { 1550 err = chfs_read_data(chmp, vp, bp); 1551 } else { 1552 mutex_enter(&chmp->chm_lock_mountfields); 1553 1554 fd = chfs_alloc_full_dnode(); 1555 1556 err = chfs_write_flash_dnode(chmp, vp, bp, fd); 1557 if (err) { 1558 mutex_exit(&chmp->chm_lock_mountfields); 1559 goto out; 1560 } 1561 1562 ip = VTOI(vp); 1563 err = chfs_add_full_dnode_to_inode(chmp, ip, fd); 1564 1565 mutex_exit(&chmp->chm_lock_mountfields); 1566 } 1567 out: 1568 biodone(bp); 1569 return err; 1570 } 1571 1572 int 1573 chfs_bmap(void *v) 1574 { 1575 struct vop_bmap_args /* { 1576 struct vnode *a_vp; 1577 daddr_t a_bn; 1578 struct vnode **a_vpp; 1579 daddr_t *a_bnp; 1580 int *a_runp; 1581 int *a_runb; 1582 } */ *ap = v; 1583 if (ap->a_vpp != NULL) 1584 *ap->a_vpp = ap->a_vp; 1585 if (ap->a_bnp != NULL) 1586 *ap->a_bnp = ap->a_bn; 1587 if (ap->a_runp != NULL) 1588 *ap->a_runp = 0; 1589 return (0); 1590 } 1591 1592 /* 1593 * vnode operations vector used for files stored in a chfs file system. 1594 */ 1595 int 1596 (**chfs_vnodeop_p)(void *); 1597 const struct vnodeopv_entry_desc chfs_vnodeop_entries[] = 1598 { 1599 { &vop_default_desc, vn_default_error }, 1600 { &vop_lookup_desc, chfs_lookup }, 1601 { &vop_create_desc, chfs_create }, 1602 { &vop_mknod_desc, chfs_mknod }, 1603 { &vop_open_desc, chfs_open }, 1604 { &vop_close_desc, chfs_close }, 1605 { &vop_access_desc, chfs_access }, 1606 { &vop_getattr_desc, chfs_getattr }, 1607 { &vop_setattr_desc, chfs_setattr }, 1608 { &vop_read_desc, chfs_read }, 1609 { &vop_write_desc, chfs_write }, 1610 { &vop_fallocate_desc, genfs_eopnotsupp }, 1611 { &vop_fdiscard_desc, genfs_eopnotsupp }, 1612 { &vop_ioctl_desc, genfs_enoioctl }, 1613 { &vop_fcntl_desc, genfs_fcntl }, 1614 { &vop_poll_desc, genfs_poll }, 1615 { &vop_kqfilter_desc, genfs_kqfilter }, 1616 { &vop_revoke_desc, genfs_revoke }, 1617 { &vop_mmap_desc, genfs_mmap }, 1618 { &vop_fsync_desc, chfs_fsync }, 1619 { &vop_seek_desc, genfs_seek }, 1620 { &vop_remove_desc, chfs_remove }, 1621 { &vop_link_desc, chfs_link }, 1622 { &vop_rename_desc, chfs_rename }, 1623 { &vop_mkdir_desc, chfs_mkdir }, 1624 { &vop_rmdir_desc, chfs_rmdir }, 1625 { &vop_symlink_desc, chfs_symlink }, 1626 { &vop_readdir_desc, chfs_readdir }, 1627 { &vop_readlink_desc, chfs_readlink }, 1628 { &vop_abortop_desc, genfs_abortop }, 1629 { &vop_inactive_desc, chfs_inactive }, 1630 { &vop_reclaim_desc, chfs_reclaim }, 1631 { &vop_lock_desc, genfs_lock }, 1632 { &vop_unlock_desc, genfs_unlock }, 1633 { &vop_bmap_desc, chfs_bmap }, 1634 { &vop_strategy_desc, chfs_strategy }, 1635 { &vop_print_desc, ufs_print }, 1636 { &vop_pathconf_desc, ufs_pathconf }, 1637 { &vop_islocked_desc, genfs_islocked }, 1638 { &vop_advlock_desc, chfs_advlock }, 1639 { &vop_bwrite_desc, vn_bwrite }, 1640 { &vop_getpages_desc, genfs_getpages }, 1641 { &vop_putpages_desc, genfs_putpages }, 1642 { NULL, NULL } }; 1643 1644 const struct vnodeopv_desc chfs_vnodeop_opv_desc = 1645 { &chfs_vnodeop_p, chfs_vnodeop_entries }; 1646 1647 /* --------------------------------------------------------------------- */ 1648 1649 /* 1650 * vnode operations vector used for special devices stored in a chfs 1651 * file system. 1652 */ 1653 int 1654 (**chfs_specop_p)(void *); 1655 const struct vnodeopv_entry_desc chfs_specop_entries[] = 1656 { 1657 { &vop_default_desc, vn_default_error }, 1658 { &vop_lookup_desc, spec_lookup }, 1659 { &vop_create_desc, spec_create }, 1660 { &vop_mknod_desc, spec_mknod }, 1661 { &vop_open_desc, spec_open }, 1662 { &vop_close_desc, ufsspec_close }, 1663 { &vop_access_desc, chfs_access }, 1664 { &vop_getattr_desc, chfs_getattr }, 1665 { &vop_setattr_desc, chfs_setattr }, 1666 { &vop_read_desc, chfs_read }, 1667 { &vop_write_desc, chfs_write }, 1668 { &vop_fallocate_desc, spec_fallocate }, 1669 { &vop_fdiscard_desc, spec_fdiscard }, 1670 { &vop_ioctl_desc, spec_ioctl }, 1671 { &vop_fcntl_desc, genfs_fcntl }, 1672 { &vop_poll_desc, spec_poll }, 1673 { &vop_kqfilter_desc, spec_kqfilter }, 1674 { &vop_revoke_desc, spec_revoke }, 1675 { &vop_mmap_desc, spec_mmap }, 1676 { &vop_fsync_desc, spec_fsync }, 1677 { &vop_seek_desc, spec_seek }, 1678 { &vop_remove_desc, spec_remove }, 1679 { &vop_link_desc, spec_link }, 1680 { &vop_rename_desc, spec_rename }, 1681 { &vop_mkdir_desc, spec_mkdir }, 1682 { &vop_rmdir_desc, spec_rmdir }, 1683 { &vop_symlink_desc, spec_symlink }, 1684 { &vop_readdir_desc, spec_readdir }, 1685 { &vop_readlink_desc, spec_readlink }, 1686 { &vop_abortop_desc, spec_abortop }, 1687 { &vop_inactive_desc, chfs_inactive }, 1688 { &vop_reclaim_desc, chfs_reclaim }, 1689 { &vop_lock_desc, genfs_lock }, 1690 { &vop_unlock_desc, genfs_unlock }, 1691 { &vop_bmap_desc, spec_bmap }, 1692 { &vop_strategy_desc, spec_strategy }, 1693 { &vop_print_desc, ufs_print }, 1694 { &vop_pathconf_desc, spec_pathconf }, 1695 { &vop_islocked_desc, genfs_islocked }, 1696 { &vop_advlock_desc, spec_advlock }, 1697 { &vop_bwrite_desc, vn_bwrite }, 1698 { &vop_getpages_desc, spec_getpages }, 1699 { &vop_putpages_desc, spec_putpages }, 1700 { NULL, NULL } }; 1701 1702 const struct vnodeopv_desc chfs_specop_opv_desc = 1703 { &chfs_specop_p, chfs_specop_entries }; 1704 1705 /* --------------------------------------------------------------------- */ 1706 /* 1707 * vnode operations vector used for fifos stored in a chfs file system. 1708 */ 1709 int 1710 (**chfs_fifoop_p)(void *); 1711 const struct vnodeopv_entry_desc chfs_fifoop_entries[] = 1712 { 1713 { &vop_default_desc, vn_default_error }, 1714 { &vop_lookup_desc, vn_fifo_bypass }, 1715 { &vop_create_desc, vn_fifo_bypass }, 1716 { &vop_mknod_desc, vn_fifo_bypass }, 1717 { &vop_open_desc, vn_fifo_bypass }, 1718 { &vop_close_desc, ufsfifo_close }, 1719 { &vop_access_desc, chfs_access }, 1720 { &vop_getattr_desc, chfs_getattr }, 1721 { &vop_setattr_desc, chfs_setattr }, 1722 { &vop_read_desc, ufsfifo_read }, 1723 { &vop_write_desc, ufsfifo_write }, 1724 { &vop_fallocate_desc, vn_fifo_bypass }, 1725 { &vop_fdiscard_desc, vn_fifo_bypass }, 1726 { &vop_ioctl_desc, vn_fifo_bypass }, 1727 { &vop_fcntl_desc, genfs_fcntl }, 1728 { &vop_poll_desc, vn_fifo_bypass }, 1729 { &vop_kqfilter_desc, vn_fifo_bypass }, 1730 { &vop_revoke_desc, vn_fifo_bypass }, 1731 { &vop_mmap_desc, vn_fifo_bypass }, 1732 { &vop_fsync_desc, vn_fifo_bypass }, 1733 { &vop_seek_desc, vn_fifo_bypass }, 1734 { &vop_remove_desc, vn_fifo_bypass }, 1735 { &vop_link_desc, vn_fifo_bypass }, 1736 { &vop_rename_desc, vn_fifo_bypass }, 1737 { &vop_mkdir_desc, vn_fifo_bypass }, 1738 { &vop_rmdir_desc, vn_fifo_bypass }, 1739 { &vop_symlink_desc, vn_fifo_bypass }, 1740 { &vop_readdir_desc, vn_fifo_bypass }, 1741 { &vop_readlink_desc, vn_fifo_bypass }, 1742 { &vop_abortop_desc, vn_fifo_bypass }, 1743 { &vop_inactive_desc, chfs_inactive }, 1744 { &vop_reclaim_desc, chfs_reclaim }, 1745 { &vop_lock_desc, genfs_lock }, 1746 { &vop_unlock_desc, genfs_unlock }, 1747 { &vop_bmap_desc, vn_fifo_bypass }, 1748 { &vop_strategy_desc, vn_fifo_bypass }, 1749 { &vop_print_desc, ufs_print }, 1750 { &vop_pathconf_desc, vn_fifo_bypass }, 1751 { &vop_islocked_desc, genfs_islocked }, 1752 { &vop_advlock_desc, vn_fifo_bypass }, 1753 { &vop_bwrite_desc, genfs_nullop }, 1754 { &vop_getpages_desc, genfs_badop }, 1755 { &vop_putpages_desc, vn_fifo_bypass }, 1756 { NULL, NULL } }; 1757 1758 const struct vnodeopv_desc chfs_fifoop_opv_desc = 1759 { &chfs_fifoop_p, chfs_fifoop_entries }; 1760
Indexes created Tue Sep 30 20:09:53 GMT 2025