chfs_vnops.c revision 1.46
1 /* $NetBSD: chfs_vnops.c,v 1.46 2021/10/20 03:08:19 thorpej 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_extern.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 return 0; 210 } 211 /* --------------------------------------------------------------------- */ 212 213 int 214 chfs_mknod(void *v) 215 { 216 struct vnode *dvp = ((struct vop_mknod_v3_args *) v)->a_dvp; 217 struct vnode **vpp = ((struct vop_mknod_v3_args *) v)->a_vpp; 218 struct componentname *cnp = ((struct vop_mknod_v3_args *) v)->a_cnp; 219 struct vattr *vap = ((struct vop_mknod_v3_args *) v)->a_vap; 220 int mode, err = 0; 221 struct chfs_inode *ip; 222 struct vnode *vp; 223 224 struct ufsmount *ump; 225 struct chfs_mount *chmp; 226 227 struct chfs_full_dnode *fd; 228 struct buf *bp; 229 int len; 230 dbg("mknod()\n"); 231 232 ump = VFSTOUFS(dvp->v_mount); 233 chmp = ump->um_chfs; 234 235 /* Check type of node. */ 236 if (vap->va_type != VBLK && vap->va_type != VCHR && vap->va_type != VFIFO) 237 return EINVAL; 238 239 vp = *vpp; 240 241 mode = MAKEIMODE(vap->va_type, vap->va_mode); 242 243 if ((mode & IFMT) == 0) { 244 switch (vap->va_type) { 245 case VBLK: 246 mode |= IFBLK; 247 break; 248 case VCHR: 249 mode |= IFCHR; 250 break; 251 case VFIFO: 252 mode |= IFIFO; 253 break; 254 default: 255 break; 256 } 257 } 258 259 /* Create a new node. */ 260 err = chfs_makeinode(mode, dvp, &vp, cnp, vap->va_type); 261 262 ip = VTOI(vp); 263 if (vap->va_rdev != VNOVAL) 264 ip->rdev = vap->va_rdev; 265 266 if (vap->va_type == VFIFO) 267 vp->v_op = chfs_fifoop_p; 268 else { 269 vp->v_op = chfs_specop_p; 270 spec_node_init(vp, ip->rdev); 271 } 272 273 if (err) 274 return err; 275 276 /* Device is written out as a data node. */ 277 len = sizeof(dev_t); 278 chfs_set_vnode_size(vp, len); 279 bp = getiobuf(vp, true); 280 bp->b_bufsize = bp->b_resid = len; 281 bp->b_data = kmem_alloc(len, KM_SLEEP); 282 memcpy(bp->b_data, &ip->rdev, len); 283 bp->b_blkno = 0; 284 285 fd = chfs_alloc_full_dnode(); 286 287 mutex_enter(&chmp->chm_lock_mountfields); 288 289 err = chfs_write_flash_dnode(chmp, vp, bp, fd); 290 if (err) { 291 mutex_exit(&chmp->chm_lock_mountfields); 292 kmem_free(bp->b_data, len); 293 return err; 294 } 295 296 /* Add data node to the inode. */ 297 err = chfs_add_full_dnode_to_inode(chmp, ip, fd); 298 if (err) { 299 mutex_exit(&chmp->chm_lock_mountfields); 300 kmem_free(bp->b_data, len); 301 return err; 302 } 303 304 mutex_exit(&chmp->chm_lock_mountfields); 305 306 *vpp = vp; 307 kmem_free(bp->b_data, len); 308 putiobuf(bp); 309 310 return 0; 311 } 312 313 /* --------------------------------------------------------------------- */ 314 315 int 316 chfs_open(void *v) 317 { 318 struct vnode *vp = ((struct vop_open_args *) v)->a_vp; 319 int mode = ((struct vop_open_args *) v)->a_mode; 320 dbg("open()\n"); 321 322 int error; 323 struct chfs_inode *ip; 324 325 KASSERT(VOP_ISLOCKED(vp)); 326 327 ip = VTOI(vp); 328 329 KASSERT(vp->v_size == ip->size); 330 if (ip->chvc->nlink < 1) { 331 error = ENOENT; 332 goto out; 333 } 334 335 /* If the file is marked append-only, deny write requests. */ 336 if (ip->flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 337 error = EPERM; 338 else 339 error = 0; 340 341 out: 342 KASSERT(VOP_ISLOCKED(vp)); 343 return error; 344 } 345 346 /* --------------------------------------------------------------------- */ 347 348 int 349 chfs_close(void *v) 350 { 351 struct vnode *vp = ((struct vop_close_args *) v)->a_vp; 352 dbg("close()\n"); 353 354 struct chfs_inode *ip; 355 356 KASSERT(VOP_ISLOCKED(vp)); 357 358 ip = VTOI(vp); 359 360 if (ip->chvc->nlink > 0) { 361 chfs_update(vp, NULL, NULL, UPDATE_CLOSE); 362 } 363 364 return 0; 365 } 366 367 /* --------------------------------------------------------------------- */ 368 369 int 370 chfs_access(void *v) 371 { 372 struct vnode *vp = ((struct vop_access_args *) v)->a_vp; 373 accmode_t accmode = ((struct vop_access_args *) v)->a_accmode; 374 kauth_cred_t cred = ((struct vop_access_args *) v)->a_cred; 375 376 dbg("access()\n"); 377 struct chfs_inode *ip = VTOI(vp); 378 379 if (accmode & VWRITE) { 380 switch (vp->v_type) { 381 case VLNK: 382 case VDIR: 383 case VREG: 384 if (vp->v_mount->mnt_flag & MNT_RDONLY) 385 return (EROFS); 386 break; 387 case VBLK: 388 case VCHR: 389 case VSOCK: 390 case VFIFO: 391 break; 392 default: 393 break; 394 } 395 } 396 397 if (accmode & VWRITE && ip->flags & IMMUTABLE) 398 return (EPERM); 399 400 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 401 vp->v_type, ip->mode & ALLPERMS), vp, NULL, genfs_can_access(vp, 402 cred, ip->uid, ip->gid, ip->mode & ALLPERMS, NULL, accmode)); 403 } 404 405 /* --------------------------------------------------------------------- */ 406 407 int 408 chfs_getattr(void *v) 409 { 410 struct vnode *vp = ((struct vop_getattr_args *) v)->a_vp; 411 struct vattr *vap = ((struct vop_getattr_args *) v)->a_vap; 412 413 struct chfs_inode *ip = VTOI(vp); 414 dbg("getattr()\n"); 415 416 KASSERT(vp->v_size == ip->size); 417 418 vattr_null(vap); 419 CHFS_ITIMES(ip, NULL, NULL, NULL); 420 421 vap->va_type = CHTTOVT(ip->ch_type); 422 vap->va_mode = ip->mode & ALLPERMS; 423 vap->va_nlink = ip->chvc->nlink; 424 vap->va_uid = ip->uid; 425 vap->va_gid = ip->gid; 426 vap->va_fsid = ip->dev; 427 vap->va_fileid = ip->ino; 428 vap->va_size = ip->size; 429 vap->va_blocksize = PAGE_SIZE; 430 vap->va_atime.tv_sec = ip->atime; 431 vap->va_atime.tv_nsec = 0; 432 vap->va_mtime.tv_sec = ip->mtime; 433 vap->va_mtime.tv_nsec = 0; 434 vap->va_ctime.tv_sec = ip->ctime; 435 vap->va_ctime.tv_nsec = 0; 436 vap->va_gen = ip->version; 437 vap->va_flags = ip->flags; 438 vap->va_rdev = ip->rdev; 439 vap->va_bytes = round_page(ip->size); 440 vap->va_filerev = VNOVAL; 441 vap->va_vaflags = 0; 442 vap->va_spare = VNOVAL; 443 444 return 0; 445 } 446 447 /* --------------------------------------------------------------------- */ 448 449 /* Note: modelled after tmpfs's same function */ 450 451 int 452 chfs_setattr(void *v) 453 { 454 struct vnode *vp = ((struct vop_setattr_args *) v)->a_vp; 455 struct vattr *vap = ((struct vop_setattr_args *) v)->a_vap; 456 kauth_cred_t cred = ((struct vop_setattr_args *) v)->a_cred; 457 458 struct chfs_inode *ip; 459 struct ufsmount *ump = VFSTOUFS(vp->v_mount); 460 struct chfs_mount *chmp = ump->um_chfs; 461 int error = 0; 462 463 dbg("setattr()\n"); 464 465 KASSERT(VOP_ISLOCKED(vp)); 466 ip = VTOI(vp); 467 468 /* Abort if any unsettable attribute is given. */ 469 if (vap->va_type != VNON || vap->va_nlink != VNOVAL || 470 vap->va_fsid != VNOVAL || vap->va_fileid != VNOVAL || 471 vap->va_blocksize != VNOVAL /*|| GOODTIME(&vap->va_ctime)*/ || 472 vap->va_gen != VNOVAL || vap->va_rdev != VNOVAL || 473 vap->va_bytes != VNOVAL) { 474 return EINVAL; 475 } 476 477 /* set flags */ 478 if (error == 0 && (vap->va_flags != VNOVAL)) { 479 error = chfs_chflags(vp, vap->va_flags, cred); 480 return error; 481 } 482 483 if (ip->flags & (IMMUTABLE | APPEND)) { 484 error = EPERM; 485 return error; 486 } 487 488 /* set size */ 489 if (error == 0 && (vap->va_size != VNOVAL)) { 490 error = chfs_chsize(vp, vap->va_size, cred); 491 if (error) 492 return error; 493 } 494 495 /* set owner */ 496 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 497 error = chfs_chown(vp, vap->va_uid, vap->va_gid, cred); 498 if (error) 499 return error; 500 } 501 502 /* set mode */ 503 if (error == 0 && (vap->va_mode != VNOVAL)) { 504 error = chfs_chmod(vp, vap->va_mode, cred); 505 if (error) 506 return error; 507 } 508 509 /* set time */ 510 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 511 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 512 NULL, genfs_can_chtimes(vp, cred, ip->uid, 513 vap->va_vaflags)); 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, 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(vp, 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 vsize_t bytelen; 776 bool async; 777 struct ufsmount *ump; 778 779 780 cred = ap->a_cred; 781 ioflag = ap->a_ioflag; 782 uio = ap->a_uio; 783 vp = ap->a_vp; 784 ip = VTOI(vp); 785 ump = ip->ump; 786 787 dbg("write\n"); 788 789 KASSERT(vp->v_size == ip->size); 790 791 switch (vp->v_type) { 792 case VREG: 793 if (ioflag & IO_APPEND) 794 uio->uio_offset = ip->size; 795 if ((ip->flags & APPEND) && uio->uio_offset != ip->size) 796 return (EPERM); 797 /* FALLTHROUGH */ 798 case VLNK: 799 break; 800 case VDIR: 801 if ((ioflag & IO_SYNC) == 0) 802 panic("chfs_write: nonsync dir write"); 803 break; 804 default: 805 panic("chfs_write: type"); 806 } 807 808 chmp = ip->chmp; 809 if (uio->uio_offset < 0 || 810 (u_int64_t)uio->uio_offset + 811 uio->uio_resid > ump->um_maxfilesize) { 812 dbg("uio->uio_offset = %lld | uio->uio_offset + " 813 "uio->uio_resid (%llu) > ump->um_maxfilesize (%lld)\n", 814 (long long)uio->uio_offset, 815 (uint64_t)uio->uio_offset + uio->uio_resid, 816 (long long)ump->um_maxfilesize); 817 return (EFBIG); 818 } 819 /* 820 * Maybe this should be above the vnode op call, but so long as 821 * file servers have no limits, I don't think it matters. 822 */ 823 l = curlwp; 824 if (vp->v_type == VREG && l && 825 uio->uio_offset + uio->uio_resid > 826 l->l_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 827 mutex_enter(&proc_lock); 828 psignal(l->l_proc, SIGXFSZ); 829 mutex_exit(&proc_lock); 830 return (EFBIG); 831 } 832 if (uio->uio_resid == 0) 833 return (0); 834 835 flags = ioflag & IO_SYNC ? B_SYNC : 0; 836 async = vp->v_mount->mnt_flag & MNT_ASYNC; 837 origoff = uio->uio_offset; 838 resid = uio->uio_resid; 839 osize = ip->size; 840 error = 0; 841 842 preallocoff = round_page(chfs_blkroundup(chmp, 843 MAX(osize, uio->uio_offset))); 844 aflag = ioflag & IO_SYNC ? B_SYNC : 0; 845 nsize = MAX(osize, uio->uio_offset + uio->uio_resid); 846 endallocoff = nsize - chfs_blkoff(chmp, nsize); 847 848 /* 849 * if we're increasing the file size, deal with expanding 850 * the fragment if there is one. 851 */ 852 853 if (nsize > osize && chfs_lblkno(chmp, osize) < UFS_NDADDR && 854 chfs_lblkno(chmp, osize) != chfs_lblkno(chmp, nsize) && 855 chfs_blkroundup(chmp, osize) != osize) { 856 off_t eob; 857 858 eob = chfs_blkroundup(chmp, osize); 859 uvm_vnp_setwritesize(vp, eob); 860 error = ufs_balloc_range(vp, osize, eob - osize, cred, aflag); 861 if (error) 862 goto out; 863 if (flags & B_SYNC) { 864 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 865 VOP_PUTPAGES(vp, 866 trunc_page(osize & chmp->chm_fs_bmask), 867 round_page(eob), 868 PGO_CLEANIT | PGO_SYNCIO | PGO_JOURNALLOCKED); 869 } 870 } 871 872 while (uio->uio_resid > 0) { 873 int ubc_flags = UBC_WRITE; 874 bool overwrite; /* if we're overwrite a whole block */ 875 off_t newoff; 876 877 if (ioflag & IO_DIRECT) { 878 genfs_directio(vp, uio, ioflag | IO_JOURNALLOCKED); 879 } 880 881 oldoff = uio->uio_offset; 882 blkoffset = chfs_blkoff(chmp, uio->uio_offset); 883 bytelen = MIN(chmp->chm_fs_bsize - blkoffset, uio->uio_resid); 884 if (bytelen == 0) { 885 break; 886 } 887 888 /* 889 * if we're filling in a hole, allocate the blocks now and 890 * initialize the pages first. if we're extending the file, 891 * we can safely allocate blocks without initializing pages 892 * since the new blocks will be inaccessible until the write 893 * is complete. 894 */ 895 overwrite = uio->uio_offset >= preallocoff && 896 uio->uio_offset < endallocoff; 897 if (!overwrite && (vp->v_vflag & VV_MAPPED) == 0 && 898 chfs_blkoff(chmp, uio->uio_offset) == 0 && 899 (uio->uio_offset & PAGE_MASK) == 0) { 900 vsize_t len; 901 902 len = trunc_page(bytelen); 903 len -= chfs_blkoff(chmp, len); 904 if (len > 0) { 905 overwrite = true; 906 bytelen = len; 907 } 908 } 909 910 newoff = oldoff + bytelen; 911 if (vp->v_size < newoff) { 912 uvm_vnp_setwritesize(vp, newoff); 913 } 914 915 if (!overwrite) { 916 error = ufs_balloc_range(vp, uio->uio_offset, bytelen, 917 cred, aflag); 918 if (error) 919 break; 920 } else { 921 genfs_node_wrlock(vp); 922 error = GOP_ALLOC(vp, uio->uio_offset, bytelen, 923 aflag, cred); 924 genfs_node_unlock(vp); 925 if (error) 926 break; 927 ubc_flags |= UBC_FAULTBUSY; 928 } 929 930 /* 931 * copy the data. 932 */ 933 934 ubc_flags |= UBC_VNODE_FLAGS(vp); 935 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 936 IO_ADV_DECODE(ioflag), ubc_flags); 937 938 /* 939 * update UVM's notion of the size now that we've 940 * copied the data into the vnode's pages. 941 * 942 * we should update the size even when uiomove failed. 943 */ 944 945 if (vp->v_size < newoff) { 946 uvm_vnp_setsize(vp, newoff); 947 } 948 949 if (error) 950 break; 951 952 /* 953 * flush what we just wrote if necessary. 954 * XXXUBC simplistic async flushing. 955 */ 956 957 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 958 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 959 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 960 (uio->uio_offset >> 16) << 16, 961 PGO_CLEANIT | PGO_JOURNALLOCKED); 962 if (error) 963 break; 964 } 965 } 966 out: 967 if (error == 0 && ioflag & IO_SYNC) { 968 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 969 error = VOP_PUTPAGES(vp, 970 trunc_page(origoff & chmp->chm_fs_bmask), 971 round_page(chfs_blkroundup(chmp, uio->uio_offset)), 972 PGO_CLEANIT | PGO_SYNCIO | PGO_JOURNALLOCKED); 973 } 974 ip->iflag |= IN_CHANGE | IN_UPDATE; 975 if (resid > uio->uio_resid && ap->a_cred) { 976 if (ip->mode & ISUID) { 977 if (kauth_authorize_vnode(ap->a_cred, 978 KAUTH_VNODE_RETAIN_SUID, vp, NULL, EPERM) != 0) 979 ip->mode &= ~ISUID; 980 } 981 982 if (ip->mode & ISGID) { 983 if (kauth_authorize_vnode(ap->a_cred, 984 KAUTH_VNODE_RETAIN_SGID, vp, NULL, EPERM) != 0) 985 ip->mode &= ~ISGID; 986 } 987 } 988 if (error) { 989 (void) UFS_TRUNCATE(vp, osize, ioflag & IO_SYNC, ap->a_cred); 990 uio->uio_offset -= resid - uio->uio_resid; 991 uio->uio_resid = resid; 992 } else if (resid > uio->uio_resid && (ioflag & IO_SYNC) == IO_SYNC) 993 error = UFS_UPDATE(vp, NULL, NULL, UPDATE_WAIT); 994 995 //FIXME HACK 996 chfs_set_vnode_size(vp, vp->v_size); 997 998 999 KASSERT(vp->v_size == ip->size); 1000 1001 mutex_enter(&chmp->chm_lock_mountfields); 1002 error = chfs_write_flash_vnode(chmp, ip, ALLOC_NORMAL); 1003 mutex_exit(&chmp->chm_lock_mountfields); 1004 1005 return (error); 1006 } 1007 1008 1009 /* --------------------------------------------------------------------- */ 1010 1011 int 1012 chfs_fsync(void *v) 1013 { 1014 struct vop_fsync_args /* { 1015 struct vnode *a_vp; 1016 kauth_cred_t a_cred; 1017 int a_flags; 1018 off_t offlo; 1019 off_t offhi; 1020 } */ *ap = v; 1021 struct vnode *vp = ap->a_vp; 1022 1023 if (ap->a_flags & FSYNC_CACHE) { 1024 return ENODEV; 1025 } 1026 vflushbuf(vp, ap->a_flags); 1027 1028 return 0; 1029 } 1030 1031 /* --------------------------------------------------------------------- */ 1032 1033 int 1034 chfs_remove(void *v) 1035 { 1036 struct vop_remove_v3_args /* { 1037 struct vnode *a_dvp; 1038 struct vnode *a_vp; 1039 struct componentname *a_cnp; 1040 nlink_t ctx_vp_new_nlink; 1041 } */ *ap = v; 1042 struct vnode *dvp = ap->a_dvp; 1043 struct vnode *vp = ap->a_vp; 1044 struct componentname *cnp = ap->a_cnp; 1045 dbg("remove\n"); 1046 1047 KASSERT(VOP_ISLOCKED(dvp)); 1048 KASSERT(VOP_ISLOCKED(vp)); 1049 1050 struct chfs_inode *ip = VTOI(vp); 1051 struct chfs_inode *parent = VTOI(dvp); 1052 int error = 0; 1053 1054 if (vp->v_type == VDIR || (ip->flags & (IMMUTABLE | APPEND)) || 1055 (parent->flags & APPEND)) { 1056 error = EPERM; 1057 goto out; 1058 } 1059 1060 KASSERT(ip->chvc->vno != ip->chvc->pvno); 1061 1062 error = chfs_do_unlink(ip, 1063 parent, cnp->cn_nameptr, cnp->cn_namelen); 1064 if (error == 0) { 1065 ap->ctx_vp_new_nlink = ip->chvc->nlink; 1066 } 1067 1068 out: 1069 vput(vp); 1070 1071 return error; 1072 } 1073 1074 /* --------------------------------------------------------------------- */ 1075 1076 int 1077 chfs_link(void *v) 1078 { 1079 struct vnode *dvp = ((struct vop_link_v2_args *) v)->a_dvp; 1080 struct vnode *vp = ((struct vop_link_v2_args *) v)->a_vp; 1081 struct componentname *cnp = ((struct vop_link_v2_args *) v)->a_cnp; 1082 1083 struct chfs_inode *ip, *parent; 1084 int error = 0; 1085 1086 if (vp->v_type == VDIR) { 1087 VOP_ABORTOP(dvp, cnp); 1088 error = EISDIR; 1089 goto out; 1090 } 1091 if (dvp->v_mount != vp->v_mount) { 1092 VOP_ABORTOP(dvp, cnp); 1093 error = EXDEV; 1094 goto out; 1095 } 1096 if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { 1097 VOP_ABORTOP(dvp, cnp); 1098 goto out; 1099 } 1100 1101 parent = VTOI(dvp); 1102 ip = VTOI(vp); 1103 1104 error = chfs_do_link(ip, 1105 parent, cnp->cn_nameptr, cnp->cn_namelen, ip->ch_type); 1106 1107 if (dvp != vp) 1108 VOP_UNLOCK(vp); 1109 out: 1110 return error; 1111 } 1112 1113 /* --------------------------------------------------------------------- */ 1114 1115 int 1116 chfs_rename(void *v) 1117 { 1118 struct vop_rename_args /* { 1119 const struct vnodeop_desc *a_desc; 1120 struct vnode *a_fdvp; 1121 struct vnode *a_fvp; 1122 struct componentname *a_fcnp; 1123 struct vnode *a_tdvp; 1124 struct vnode *a_tvp; 1125 struct componentname *a_tcnp; 1126 } */ *ap = v; 1127 struct vnode *fdvp = ap->a_fdvp; 1128 struct vnode *fvp = ap->a_fvp; 1129 struct componentname *fcnp = ap->a_fcnp; 1130 struct vnode *tdvp = ap->a_tdvp; 1131 struct vnode *tvp = ap->a_tvp; 1132 struct componentname *tcnp = ap->a_tcnp; 1133 1134 struct chfs_inode *oldparent, *old; 1135 struct chfs_inode *newparent; 1136 struct chfs_dirent *fd; 1137 struct chfs_inode *ip; 1138 int error = 0; 1139 dbg("rename\n"); 1140 1141 KASSERT(VOP_ISLOCKED(tdvp)); 1142 KASSERT(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp) == LK_EXCLUSIVE)); 1143 1144 oldparent = VTOI(fdvp); 1145 old = VTOI(fvp); 1146 newparent = VTOI(tdvp); 1147 if (tvp) { 1148 dbg("tvp not null\n"); 1149 ip = VTOI(tvp); 1150 if (tvp->v_type == VDIR) { 1151 TAILQ_FOREACH(fd, &ip->dents, fds) { 1152 if (fd->vno) { 1153 error = ENOTEMPTY; 1154 goto out_unlocked; 1155 } 1156 } 1157 } 1158 error = chfs_do_unlink(ip, 1159 newparent, tcnp->cn_nameptr, tcnp->cn_namelen); 1160 vput(tvp); 1161 } 1162 VFS_VGET(tdvp->v_mount, old->ino, LK_EXCLUSIVE, &tvp); 1163 ip = VTOI(tvp); 1164 1165 /* link new */ 1166 error = chfs_do_link(ip, 1167 newparent, tcnp->cn_nameptr, tcnp->cn_namelen, ip->ch_type); 1168 /* remove old */ 1169 error = chfs_do_unlink(old, 1170 oldparent, fcnp->cn_nameptr, fcnp->cn_namelen); 1171 1172 out_unlocked: 1173 /* Release target nodes. */ 1174 if (tdvp == tvp) 1175 vrele(tdvp); 1176 else 1177 vput(tdvp); 1178 if (tvp != NULL) 1179 vput(tvp); 1180 1181 /* Release source nodes. */ 1182 vrele(fdvp); 1183 vrele(fvp); 1184 1185 return error; 1186 } 1187 1188 /* --------------------------------------------------------------------- */ 1189 1190 int 1191 chfs_mkdir(void *v) 1192 { 1193 struct vnode *dvp = ((struct vop_mkdir_v3_args *) v)->a_dvp; 1194 struct vnode **vpp = ((struct vop_mkdir_v3_args *)v)->a_vpp; 1195 struct componentname *cnp = ((struct vop_mkdir_v3_args *) v)->a_cnp; 1196 struct vattr *vap = ((struct vop_mkdir_v3_args *) v)->a_vap; 1197 dbg("mkdir()\n"); 1198 1199 int mode; 1200 1201 mode = vap->va_mode & ACCESSPERMS; 1202 if ((mode & IFMT) == 0) { 1203 mode |= IFDIR; 1204 } 1205 1206 KASSERT(vap->va_type == VDIR); 1207 1208 return chfs_makeinode(mode, dvp, vpp, cnp, VDIR); 1209 } 1210 1211 /* --------------------------------------------------------------------- */ 1212 1213 int 1214 chfs_rmdir(void *v) 1215 { 1216 struct vnode *dvp = ((struct vop_rmdir_v2_args *) v)->a_dvp; 1217 struct vnode *vp = ((struct vop_rmdir_v2_args *) v)->a_vp; 1218 struct componentname *cnp = ((struct vop_rmdir_v2_args *) v)->a_cnp; 1219 dbg("rmdir()\n"); 1220 1221 KASSERT(VOP_ISLOCKED(dvp)); 1222 KASSERT(VOP_ISLOCKED(vp)); 1223 1224 struct chfs_inode *ip = VTOI(vp); 1225 struct chfs_inode *parent = VTOI(dvp); 1226 struct chfs_dirent *fd; 1227 int error = 0; 1228 1229 if (vp->v_type != VDIR) { 1230 error = ENOTDIR; 1231 goto out; 1232 } 1233 1234 KASSERT(ip->chvc->vno != ip->chvc->pvno); 1235 1236 TAILQ_FOREACH(fd, &ip->dents, fds) { 1237 if (fd->vno) { 1238 error = ENOTEMPTY; 1239 goto out; 1240 } 1241 } 1242 1243 error = chfs_do_unlink(ip, 1244 parent, cnp->cn_nameptr, cnp->cn_namelen); 1245 1246 out: 1247 vput(vp); 1248 1249 return error; 1250 } 1251 1252 /* --------------------------------------------------------------------- */ 1253 1254 int 1255 chfs_symlink(void *v) 1256 { 1257 struct vnode *dvp = ((struct vop_symlink_v3_args *) v)->a_dvp; 1258 struct vnode **vpp = ((struct vop_symlink_v3_args *) v)->a_vpp; 1259 struct componentname *cnp = ((struct vop_symlink_v3_args *) v)->a_cnp; 1260 struct vattr *vap = ((struct vop_symlink_v3_args *) v)->a_vap; 1261 char *target = ((struct vop_symlink_v3_args *) v)->a_target; 1262 1263 struct ufsmount *ump; 1264 struct chfs_mount *chmp; 1265 struct vnode *vp; 1266 struct chfs_inode *ip; 1267 int len, err; 1268 struct chfs_full_dnode *fd; 1269 struct buf *bp; 1270 dbg("symlink()\n"); 1271 1272 ump = VFSTOUFS(dvp->v_mount); 1273 chmp = ump->um_chfs; 1274 1275 err = chfs_makeinode(IFLNK | vap->va_mode, dvp, vpp, cnp, VLNK); 1276 if (err) 1277 return (err); 1278 vp = *vpp; 1279 len = strlen(target); 1280 ip = VTOI(vp); 1281 /* TODO max symlink len instead of "100" */ 1282 if (len < 100) { 1283 /* symlink path stored as a data node */ 1284 ip->target = kmem_alloc(len, KM_SLEEP); 1285 memcpy(ip->target, target, len); 1286 chfs_set_vnode_size(vp, len); 1287 ip->iflag |= IN_CHANGE | IN_UPDATE; 1288 1289 bp = getiobuf(vp, true); 1290 bp->b_bufsize = bp->b_resid = len; 1291 bp->b_data = kmem_alloc(len, KM_SLEEP); 1292 memcpy(bp->b_data, target, len); 1293 bp->b_blkno = 0; 1294 1295 fd = chfs_alloc_full_dnode(); 1296 1297 mutex_enter(&chmp->chm_lock_mountfields); 1298 1299 /* write out the data node */ 1300 err = chfs_write_flash_dnode(chmp, vp, bp, fd); 1301 if (err) { 1302 mutex_exit(&chmp->chm_lock_mountfields); 1303 goto out; 1304 } 1305 1306 /* add it to the inode */ 1307 err = chfs_add_full_dnode_to_inode(chmp, ip, fd); 1308 if (err) { 1309 mutex_exit(&chmp->chm_lock_mountfields); 1310 goto out; 1311 } 1312 1313 mutex_exit(&chmp->chm_lock_mountfields); 1314 1315 kmem_free(bp->b_data, len); 1316 putiobuf(bp); 1317 1318 uvm_vnp_setsize(vp, len); 1319 } else { 1320 err = ufs_bufio(UIO_WRITE, vp, target, len, (off_t)0, 1321 IO_NODELOCKED, cnp->cn_cred, (size_t *)0, NULL); 1322 } 1323 1324 out: 1325 if (err) 1326 vrele(vp); 1327 1328 return (err); 1329 } 1330 1331 /* --------------------------------------------------------------------- */ 1332 1333 int 1334 chfs_readdir(void *v) 1335 { 1336 struct vnode *vp = ((struct vop_readdir_args *) v)->a_vp; 1337 struct uio *uio = ((struct vop_readdir_args *) v)->a_uio; 1338 int *eofflag = ((struct vop_readdir_args *) v)->a_eofflag; 1339 1340 int error = 0; 1341 off_t skip, offset; 1342 struct chfs_inode *ip; 1343 struct chfs_dirent *fd; 1344 1345 struct ufsmount *ump; 1346 struct chfs_mount *chmp; 1347 struct chfs_vnode_cache *chvc; 1348 1349 KASSERT(VOP_ISLOCKED(vp)); 1350 1351 /* This operation only makes sense on directory nodes. */ 1352 if (vp->v_type != VDIR) { 1353 error = ENOTDIR; 1354 goto out; 1355 } 1356 1357 ip = VTOI(vp); 1358 1359 /* uiomove in chfs_filldir automatically increments the 1360 * uio_offset by an arbitrary size, so we discard any change 1361 * to uio_offset and set it to our own value on return 1362 */ 1363 offset = uio->uio_offset; 1364 1365 /* Add this entry. */ 1366 if (offset == CHFS_OFFSET_DOT) { 1367 error = chfs_filldir(uio, ip->ino, ".", 1, CHT_DIR); 1368 if (error == -1) { 1369 error = 0; 1370 goto outok; 1371 } else if (error != 0) 1372 goto outok; 1373 1374 offset = CHFS_OFFSET_DOTDOT; 1375 } 1376 1377 /* Add parent entry. */ 1378 if (offset == CHFS_OFFSET_DOTDOT) { 1379 ump = VFSTOUFS(vp->v_mount); 1380 chmp = ump->um_chfs; 1381 mutex_enter(&chmp->chm_lock_vnocache); 1382 chvc = chfs_vnode_cache_get(chmp, ip->ino); 1383 mutex_exit(&chmp->chm_lock_vnocache); 1384 1385 error = chfs_filldir(uio, chvc->pvno, "..", 2, CHT_DIR); 1386 if (error == -1) { 1387 error = 0; 1388 goto outok; 1389 } else if (error != 0) { 1390 goto outok; 1391 } 1392 1393 /* Has child or not? */ 1394 if (TAILQ_EMPTY(&ip->dents)) { 1395 offset = CHFS_OFFSET_EOF; 1396 } else { 1397 offset = CHFS_OFFSET_FIRST; 1398 } 1399 } 1400 1401 if (offset != CHFS_OFFSET_EOF) { 1402 /* Child entries. */ 1403 skip = offset - CHFS_OFFSET_FIRST; 1404 1405 TAILQ_FOREACH(fd, &ip->dents, fds) { 1406 /* seek to offset by skipping items */ 1407 /* XXX race conditions by changed dirent? */ 1408 if (skip > 0) { 1409 skip--; 1410 continue; 1411 } 1412 1413 if (fd->vno != 0) { 1414 error = chfs_filldir(uio, fd->vno, 1415 fd->name, fd->nsize, fd->type); 1416 if (error == -1) { 1417 error = 0; 1418 goto outok; 1419 } else if (error != 0) { 1420 dbg("err %d\n", error); 1421 goto outok; 1422 } 1423 } 1424 offset++; 1425 } 1426 } 1427 offset = CHFS_OFFSET_EOF; 1428 1429 outok: 1430 uio->uio_offset = offset; 1431 1432 if (eofflag != NULL) { 1433 *eofflag = (error == 0 && 1434 uio->uio_offset == CHFS_OFFSET_EOF); 1435 } 1436 1437 out: 1438 KASSERT(VOP_ISLOCKED(vp)); 1439 1440 return error; 1441 } 1442 1443 /* --------------------------------------------------------------------- */ 1444 1445 int 1446 chfs_readlink(void *v) 1447 { 1448 1449 struct vnode *vp = ((struct vop_readlink_args *) v)->a_vp; 1450 struct uio *uio = ((struct vop_readlink_args *) v)->a_uio; 1451 kauth_cred_t cred = ((struct vop_readlink_args *) v)->a_cred; 1452 1453 struct chfs_inode *ip = VTOI(vp); 1454 1455 dbg("readlink()\n"); 1456 1457 /* TODO max symlink len instead of "100" */ 1458 if (ip->size < 100) { 1459 uiomove(ip->target, ip->size, uio); 1460 return (0); 1461 } 1462 1463 return (UFS_BUFRD(vp, uio, 0, cred)); 1464 } 1465 1466 /* --------------------------------------------------------------------- */ 1467 1468 int 1469 chfs_inactive(void *v) 1470 { 1471 struct vnode *vp = ((struct vop_inactive_v2_args *) v)->a_vp; 1472 struct chfs_inode *ip = VTOI(vp); 1473 struct chfs_vnode_cache *chvc; 1474 dbg("inactive | vno: %llu\n", (unsigned long long)ip->ino); 1475 1476 KASSERT(VOP_ISLOCKED(vp)); 1477 1478 /* Reclaim only if there is no link to the node. */ 1479 if (ip->ino) { 1480 chvc = ip->chvc; 1481 if (chvc->nlink) 1482 *((struct vop_inactive_v2_args *) v)->a_recycle = 0; 1483 } else { 1484 *((struct vop_inactive_v2_args *) v)->a_recycle = 1; 1485 } 1486 1487 return 0; 1488 } 1489 1490 /* --------------------------------------------------------------------- */ 1491 1492 int 1493 chfs_reclaim(void *v) 1494 { 1495 struct vop_reclaim_v2_args *ap = v; 1496 struct vnode *vp = ap->a_vp; 1497 struct chfs_inode *ip = VTOI(vp); 1498 struct chfs_mount *chmp = ip->chmp; 1499 struct chfs_dirent *fd; 1500 1501 VOP_UNLOCK(vp); 1502 1503 mutex_enter(&chmp->chm_lock_mountfields); 1504 1505 mutex_enter(&chmp->chm_lock_vnocache); 1506 ip->chvc->state = VNO_STATE_CHECKEDABSENT; 1507 mutex_exit(&chmp->chm_lock_vnocache); 1508 1509 chfs_update(vp, NULL, NULL, UPDATE_CLOSE); 1510 1511 /* Clean fragments. */ 1512 chfs_kill_fragtree(chmp, &ip->fragtree); 1513 1514 /* Clean dirents. */ 1515 fd = TAILQ_FIRST(&ip->dents); 1516 while (fd) { 1517 TAILQ_REMOVE(&ip->dents, fd, fds); 1518 chfs_free_dirent(fd); 1519 fd = TAILQ_FIRST(&ip->dents); 1520 } 1521 1522 cache_purge(vp); 1523 if (ip->devvp) { 1524 vrele(ip->devvp); 1525 ip->devvp = 0; 1526 } 1527 1528 genfs_node_destroy(vp); 1529 pool_put(&chfs_inode_pool, vp->v_data); 1530 vp->v_data = NULL; 1531 1532 mutex_exit(&chmp->chm_lock_mountfields); 1533 1534 return (0); 1535 } 1536 1537 /* --------------------------------------------------------------------- */ 1538 1539 int 1540 chfs_advlock(void *v) 1541 { 1542 return 0; 1543 } 1544 1545 /* --------------------------------------------------------------------- */ 1546 int 1547 chfs_strategy(void *v) 1548 { 1549 struct vop_strategy_args /* { 1550 const struct vnodeop_desc *a_desc; 1551 struct vnode *a_vp; 1552 struct buf *a_bp; 1553 } */ *ap = v; 1554 struct chfs_full_dnode *fd; 1555 struct buf *bp = ap->a_bp; 1556 struct vnode *vp = ap->a_vp; 1557 struct chfs_inode *ip = VTOI(vp); 1558 struct chfs_mount *chmp = ip->chmp; 1559 int read = (bp->b_flags & B_READ) ? 1 : 0; 1560 int err = 0; 1561 1562 if (read) { 1563 err = chfs_read_data(chmp, vp, bp); 1564 } else { 1565 mutex_enter(&chmp->chm_lock_mountfields); 1566 1567 fd = chfs_alloc_full_dnode(); 1568 1569 err = chfs_write_flash_dnode(chmp, vp, bp, fd); 1570 if (err) { 1571 mutex_exit(&chmp->chm_lock_mountfields); 1572 goto out; 1573 } 1574 1575 ip = VTOI(vp); 1576 err = chfs_add_full_dnode_to_inode(chmp, ip, fd); 1577 1578 mutex_exit(&chmp->chm_lock_mountfields); 1579 } 1580 out: 1581 biodone(bp); 1582 return err; 1583 } 1584 1585 int 1586 chfs_bmap(void *v) 1587 { 1588 struct vop_bmap_args /* { 1589 struct vnode *a_vp; 1590 daddr_t a_bn; 1591 struct vnode **a_vpp; 1592 daddr_t *a_bnp; 1593 int *a_runp; 1594 int *a_runb; 1595 } */ *ap = v; 1596 if (ap->a_vpp != NULL) 1597 *ap->a_vpp = ap->a_vp; 1598 if (ap->a_bnp != NULL) 1599 *ap->a_bnp = ap->a_bn; 1600 if (ap->a_runp != NULL) 1601 *ap->a_runp = 0; 1602 return (0); 1603 } 1604 1605 /* 1606 * vnode operations vector used for files stored in a chfs file system. 1607 */ 1608 int 1609 (**chfs_vnodeop_p)(void *); 1610 const struct vnodeopv_entry_desc chfs_vnodeop_entries[] = 1611 { 1612 { &vop_default_desc, vn_default_error }, 1613 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 1614 { &vop_lookup_desc, chfs_lookup }, 1615 { &vop_create_desc, chfs_create }, 1616 { &vop_mknod_desc, chfs_mknod }, 1617 { &vop_open_desc, chfs_open }, 1618 { &vop_close_desc, chfs_close }, 1619 { &vop_access_desc, chfs_access }, 1620 { &vop_accessx_desc, genfs_accessx }, 1621 { &vop_getattr_desc, chfs_getattr }, 1622 { &vop_setattr_desc, chfs_setattr }, 1623 { &vop_read_desc, chfs_read }, 1624 { &vop_write_desc, chfs_write }, 1625 { &vop_fallocate_desc, genfs_eopnotsupp }, 1626 { &vop_fdiscard_desc, genfs_eopnotsupp }, 1627 { &vop_ioctl_desc, genfs_enoioctl }, 1628 { &vop_fcntl_desc, genfs_fcntl }, 1629 { &vop_poll_desc, genfs_poll }, 1630 { &vop_kqfilter_desc, genfs_kqfilter }, 1631 { &vop_revoke_desc, genfs_revoke }, 1632 { &vop_mmap_desc, genfs_mmap }, 1633 { &vop_fsync_desc, chfs_fsync }, 1634 { &vop_seek_desc, genfs_seek }, 1635 { &vop_remove_desc, chfs_remove }, 1636 { &vop_link_desc, chfs_link }, 1637 { &vop_rename_desc, chfs_rename }, 1638 { &vop_mkdir_desc, chfs_mkdir }, 1639 { &vop_rmdir_desc, chfs_rmdir }, 1640 { &vop_symlink_desc, chfs_symlink }, 1641 { &vop_readdir_desc, chfs_readdir }, 1642 { &vop_readlink_desc, chfs_readlink }, 1643 { &vop_abortop_desc, genfs_abortop }, 1644 { &vop_inactive_desc, chfs_inactive }, 1645 { &vop_reclaim_desc, chfs_reclaim }, 1646 { &vop_lock_desc, genfs_lock }, 1647 { &vop_unlock_desc, genfs_unlock }, 1648 { &vop_bmap_desc, chfs_bmap }, 1649 { &vop_strategy_desc, chfs_strategy }, 1650 { &vop_print_desc, ufs_print }, 1651 { &vop_pathconf_desc, ufs_pathconf }, 1652 { &vop_islocked_desc, genfs_islocked }, 1653 { &vop_advlock_desc, chfs_advlock }, 1654 { &vop_bwrite_desc, vn_bwrite }, 1655 { &vop_getpages_desc, genfs_getpages }, 1656 { &vop_putpages_desc, genfs_putpages }, 1657 { NULL, NULL } }; 1658 1659 const struct vnodeopv_desc chfs_vnodeop_opv_desc = 1660 { &chfs_vnodeop_p, chfs_vnodeop_entries }; 1661 1662 /* --------------------------------------------------------------------- */ 1663 1664 /* 1665 * vnode operations vector used for special devices stored in a chfs 1666 * file system. 1667 */ 1668 int 1669 (**chfs_specop_p)(void *); 1670 const struct vnodeopv_entry_desc chfs_specop_entries[] = 1671 { 1672 { &vop_default_desc, vn_default_error }, 1673 GENFS_SPECOP_ENTRIES, 1674 { &vop_close_desc, ufsspec_close }, 1675 { &vop_access_desc, chfs_access }, 1676 { &vop_accessx_desc, genfs_accessx }, 1677 { &vop_getattr_desc, chfs_getattr }, 1678 { &vop_setattr_desc, chfs_setattr }, 1679 { &vop_read_desc, chfs_read }, 1680 { &vop_write_desc, chfs_write }, 1681 { &vop_fcntl_desc, genfs_fcntl }, 1682 { &vop_fsync_desc, spec_fsync }, 1683 { &vop_inactive_desc, chfs_inactive }, 1684 { &vop_reclaim_desc, chfs_reclaim }, 1685 { &vop_lock_desc, genfs_lock }, 1686 { &vop_unlock_desc, genfs_unlock }, 1687 { &vop_print_desc, ufs_print }, 1688 { &vop_islocked_desc, genfs_islocked }, 1689 { &vop_bwrite_desc, vn_bwrite }, 1690 { NULL, NULL } }; 1691 1692 const struct vnodeopv_desc chfs_specop_opv_desc = 1693 { &chfs_specop_p, chfs_specop_entries }; 1694 1695 /* --------------------------------------------------------------------- */ 1696 /* 1697 * vnode operations vector used for fifos stored in a chfs file system. 1698 */ 1699 int 1700 (**chfs_fifoop_p)(void *); 1701 const struct vnodeopv_entry_desc chfs_fifoop_entries[] = 1702 { 1703 { &vop_default_desc, vn_default_error }, 1704 GENFS_FIFOOP_ENTRIES, 1705 { &vop_close_desc, ufsfifo_close }, 1706 { &vop_access_desc, chfs_access }, 1707 { &vop_accessx_desc, genfs_accessx }, 1708 { &vop_getattr_desc, chfs_getattr }, 1709 { &vop_setattr_desc, chfs_setattr }, 1710 { &vop_read_desc, ufsfifo_read }, 1711 { &vop_write_desc, ufsfifo_write }, 1712 { &vop_fcntl_desc, genfs_fcntl }, 1713 { &vop_fsync_desc, vn_fifo_bypass }, 1714 { &vop_inactive_desc, chfs_inactive }, 1715 { &vop_reclaim_desc, chfs_reclaim }, 1716 { &vop_lock_desc, genfs_lock }, 1717 { &vop_unlock_desc, genfs_unlock }, 1718 { &vop_strategy_desc, vn_fifo_bypass }, 1719 { &vop_print_desc, ufs_print }, 1720 { &vop_islocked_desc, genfs_islocked }, 1721 { &vop_bwrite_desc, genfs_nullop }, 1722 { NULL, NULL } }; 1723 1724 const struct vnodeopv_desc chfs_fifoop_opv_desc = 1725 { &chfs_fifoop_p, chfs_fifoop_entries }; 1726
Indexes created Mon Sep 29 21:09:56 GMT 2025