1 /* $NetBSD: sysvbfs_vnops.c,v 1.69 2022/07/31 13:08:18 mlelstv Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: sysvbfs_vnops.c,v 1.69 2022/07/31 13:08:18 mlelstv Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/resource.h> 38 #include <sys/vnode.h> 39 #include <sys/namei.h> 40 #include <sys/dirent.h> 41 #include <sys/malloc.h> 42 #include <sys/lockf.h> 43 #include <sys/unistd.h> 44 #include <sys/fcntl.h> 45 #include <sys/kauth.h> 46 #include <sys/buf.h> 47 48 #include <miscfs/genfs/genfs.h> 49 50 #include <fs/sysvbfs/sysvbfs.h> 51 #include <fs/sysvbfs/bfs.h> 52 53 #ifdef SYSVBFS_VNOPS_DEBUG 54 #define DPRINTF(fmt, args...) printf(fmt, ##args) 55 #else 56 #define DPRINTF(arg...) ((void)0) 57 #endif 58 #define ROUND_SECTOR(x) (((x) + 511) & ~511) 59 60 MALLOC_JUSTDEFINE(M_SYSVBFS_VNODE, "sysvbfs vnode", "sysvbfs vnode structures"); 61 MALLOC_DECLARE(M_BFS); 62 63 static void sysvbfs_file_setsize(struct vnode *, size_t); 64 65 int 66 sysvbfs_lookup(void *arg) 67 { 68 struct vop_lookup_v2_args /* { 69 struct vnode *a_dvp; 70 struct vnode **a_vpp; 71 struct componentname *a_cnp; 72 } */ *a = arg; 73 struct vnode *v = a->a_dvp; 74 struct sysvbfs_node *bnode = v->v_data; 75 struct bfs *bfs = bnode->bmp->bfs; /* my filesystem */ 76 struct vnode *vpp = NULL; 77 struct bfs_dirent *dirent = NULL; 78 struct componentname *cnp = a->a_cnp; 79 int nameiop = cnp->cn_nameiop; 80 const char *name = cnp->cn_nameptr; 81 int namelen = cnp->cn_namelen; 82 int error; 83 84 DPRINTF("%s: %s op=%d %d\n", __func__, name, nameiop, 85 cnp->cn_flags); 86 87 *a->a_vpp = NULL; 88 89 KASSERT((cnp->cn_flags & ISDOTDOT) == 0); 90 91 if ((error = VOP_ACCESS(a->a_dvp, VEXEC, cnp->cn_cred)) != 0) { 92 return error; /* directory permission. */ 93 } 94 95 /* Deny last component write operation on a read-only mount */ 96 if ((cnp->cn_flags & ISLASTCN) && (v->v_mount->mnt_flag & MNT_RDONLY) && 97 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 98 return EROFS; 99 100 if (namelen == 1 && name[0] == '.') { /* "." */ 101 vref(v); 102 *a->a_vpp = v; 103 } else { /* Regular file */ 104 if (!bfs_dirent_lookup_by_name(bfs, cnp->cn_nameptr, 105 &dirent)) { 106 if (nameiop != CREATE && nameiop != RENAME) { 107 DPRINTF("%s: no such a file. (1)\n", 108 __func__); 109 return ENOENT; 110 } 111 if ((error = VOP_ACCESS(v, VWRITE, cnp->cn_cred)) != 0) 112 return error; 113 return EJUSTRETURN; 114 } 115 116 /* Allocate v-node */ 117 error = sysvbfs_vget(v->v_mount, dirent->inode, 118 LK_EXCLUSIVE, &vpp); 119 if (error != 0) { 120 DPRINTF("%s: can't get vnode.\n", __func__); 121 return error; 122 } 123 VOP_UNLOCK(vpp); 124 *a->a_vpp = vpp; 125 } 126 127 return 0; 128 } 129 130 int 131 sysvbfs_create(void *arg) 132 { 133 struct vop_create_v3_args /* { 134 struct vnode *a_dvp; 135 struct vnode **a_vpp; 136 struct componentname *a_cnp; 137 struct vattr *a_vap; 138 } */ *a = arg; 139 struct sysvbfs_node *bnode = a->a_dvp->v_data; 140 struct sysvbfs_mount *bmp = bnode->bmp; 141 struct bfs *bfs = bmp->bfs; 142 struct mount *mp = bmp->mountp; 143 struct bfs_dirent *dirent; 144 struct bfs_fileattr attr; 145 struct vattr *va = a->a_vap; 146 kauth_cred_t cr = a->a_cnp->cn_cred; 147 int err = 0; 148 149 DPRINTF("%s: %s\n", __func__, a->a_cnp->cn_nameptr); 150 KDASSERT(a->a_vap->va_type == VREG); 151 attr.uid = kauth_cred_geteuid(cr); 152 attr.gid = kauth_cred_getegid(cr); 153 attr.mode = va->va_mode; 154 155 if ((err = bfs_file_create(bfs, a->a_cnp->cn_nameptr, 0, 0, &attr)) 156 != 0) { 157 DPRINTF("%s: bfs_file_create failed.\n", __func__); 158 return err; 159 } 160 161 if (!bfs_dirent_lookup_by_name(bfs, a->a_cnp->cn_nameptr, &dirent)) 162 panic("no dirent for created file."); 163 164 err = sysvbfs_vget(mp, dirent->inode, LK_EXCLUSIVE, a->a_vpp); 165 if (err != 0) { 166 DPRINTF("%s: sysvbfs_vget failed.\n", __func__); 167 return err; 168 } 169 bnode = (*a->a_vpp)->v_data; 170 bnode->update_ctime = true; 171 bnode->update_mtime = true; 172 bnode->update_atime = true; 173 VOP_UNLOCK(*a->a_vpp); 174 175 return err; 176 } 177 178 int 179 sysvbfs_open(void *arg) 180 { 181 struct vop_open_args /* { 182 struct vnode *a_vp; 183 int a_mode; 184 kauth_cred_t a_cred; 185 } */ *a = arg; 186 struct vnode *v = a->a_vp; 187 struct sysvbfs_node *bnode = v->v_data; 188 struct bfs_inode *inode = bnode->inode; 189 190 DPRINTF("%s:\n", __func__); 191 KDASSERT(v->v_type == VREG || v->v_type == VDIR); 192 193 bnode->update_atime = true; 194 if ((a->a_mode & FWRITE) && !(a->a_mode & O_APPEND)) { 195 bnode->size = 0; 196 } else { 197 bnode->size = bfs_file_size(inode); 198 } 199 bnode->data_block = inode->start_sector; 200 201 return 0; 202 } 203 204 int 205 sysvbfs_close(void *arg) 206 { 207 struct vop_close_args /* { 208 struct vnodeop_desc *a_desc; 209 struct vnode *a_vp; 210 int a_fflag; 211 kauth_cred_t a_cred; 212 } */ *a = arg; 213 struct vnode *v = a->a_vp; 214 struct sysvbfs_node *bnode = v->v_data; 215 struct bfs_fileattr attr; 216 217 DPRINTF("%s:\n", __func__); 218 219 if (v->v_mount->mnt_flag & MNT_RDONLY) 220 goto out; 221 222 uvm_vnp_setsize(v, bnode->size); 223 224 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 225 if (bnode->update_atime) 226 attr.atime = time_second; 227 if (bnode->update_ctime) 228 attr.ctime = time_second; 229 if (bnode->update_mtime) 230 attr.mtime = time_second; 231 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 232 233 VOP_FSYNC(a->a_vp, a->a_cred, FSYNC_WAIT, 0, 0); 234 235 out: 236 return 0; 237 } 238 239 static int 240 sysvbfs_check_possible(struct vnode *vp, struct sysvbfs_node *bnode, 241 mode_t mode) 242 { 243 244 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 245 return EROFS; 246 247 return 0; 248 } 249 250 static int 251 sysvbfs_check_permitted(struct vnode *vp, struct sysvbfs_node *bnode, 252 accmode_t accmode, kauth_cred_t cred) 253 { 254 struct bfs_fileattr *attr = &bnode->inode->attr; 255 256 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 257 vp->v_type, attr->mode), vp, NULL, genfs_can_access(vp, cred, 258 attr->uid, attr->gid, attr->mode, NULL, accmode)); 259 } 260 261 int 262 sysvbfs_access(void *arg) 263 { 264 struct vop_access_args /* { 265 struct vnode *a_vp; 266 accmode_t a_accmode; 267 kauth_cred_t a_cred; 268 } */ *ap = arg; 269 struct vnode *vp = ap->a_vp; 270 struct sysvbfs_node *bnode = vp->v_data; 271 int error; 272 273 DPRINTF("%s:\n", __func__); 274 275 error = sysvbfs_check_possible(vp, bnode, ap->a_accmode); 276 if (error) 277 return error; 278 279 error = sysvbfs_check_permitted(vp, bnode, ap->a_accmode, ap->a_cred); 280 281 return error; 282 } 283 284 int 285 sysvbfs_getattr(void *v) 286 { 287 struct vop_getattr_args /* { 288 struct vnode *a_vp; 289 struct vattr *a_vap; 290 kauth_cred_t a_cred; 291 } */ *ap = v; 292 struct vnode *vp = ap->a_vp; 293 struct sysvbfs_node *bnode = vp->v_data; 294 struct bfs_inode *inode = bnode->inode; 295 struct bfs_fileattr *attr = &inode->attr; 296 struct sysvbfs_mount *bmp = bnode->bmp; 297 struct vattr *vap = ap->a_vap; 298 299 DPRINTF("%s:\n", __func__); 300 301 vap->va_type = vp->v_type; 302 vap->va_mode = attr->mode; 303 vap->va_nlink = attr->nlink; 304 vap->va_uid = attr->uid; 305 vap->va_gid = attr->gid; 306 vap->va_fsid = bmp->devvp->v_rdev; 307 vap->va_fileid = inode->number; 308 vap->va_size = bfs_file_size(inode); 309 vap->va_blocksize = BFS_BSIZE; 310 vap->va_atime.tv_sec = attr->atime; 311 vap->va_mtime.tv_sec = attr->mtime; 312 vap->va_ctime.tv_sec = attr->ctime; 313 vap->va_birthtime.tv_sec = 0; 314 vap->va_gen = 1; 315 vap->va_flags = 0; 316 vap->va_rdev = 0; /* No device file */ 317 vap->va_bytes = vap->va_size; 318 vap->va_filerev = 0; 319 vap->va_vaflags = 0; 320 321 return 0; 322 } 323 324 int 325 sysvbfs_setattr(void *arg) 326 { 327 struct vop_setattr_args /* { 328 struct vnode *a_vp; 329 struct vattr *a_vap; 330 kauth_cred_t a_cred; 331 struct proc *p; 332 } */ *ap = arg; 333 struct vnode *vp = ap->a_vp; 334 struct vattr *vap = ap->a_vap; 335 struct sysvbfs_node *bnode = vp->v_data; 336 struct bfs_inode *inode = bnode->inode; 337 struct bfs_fileattr *attr = &inode->attr; 338 struct bfs *bfs = bnode->bmp->bfs; 339 kauth_cred_t cred = ap->a_cred; 340 int error; 341 342 DPRINTF("%s:\n", __func__); 343 if (vp->v_mount->mnt_flag & MNT_RDONLY) 344 return EROFS; 345 346 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 347 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 348 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 349 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) 350 return EINVAL; 351 352 if (vap->va_flags != VNOVAL) 353 return EOPNOTSUPP; 354 355 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 356 uid_t uid = 357 (vap->va_uid != (uid_t)VNOVAL) ? vap->va_uid : attr->uid; 358 gid_t gid = 359 (vap->va_gid != (gid_t)VNOVAL) ? vap->va_gid : attr->gid; 360 error = kauth_authorize_vnode(cred, 361 KAUTH_VNODE_CHANGE_OWNERSHIP, vp, NULL, 362 genfs_can_chown(vp, cred, attr->uid, attr->gid, uid, gid)); 363 if (error) 364 return error; 365 attr->uid = uid; 366 attr->gid = gid; 367 } 368 369 if (vap->va_size != VNOVAL) 370 switch (vp->v_type) { 371 case VDIR: 372 return EISDIR; 373 case VCHR: 374 case VBLK: 375 case VFIFO: 376 break; 377 case VREG: 378 if (vp->v_mount->mnt_flag & MNT_RDONLY) 379 return EROFS; 380 sysvbfs_file_setsize(vp, vap->va_size); 381 break; 382 default: 383 return EOPNOTSUPP; 384 } 385 386 if (vap->va_mode != (mode_t)VNOVAL) { 387 mode_t mode = vap->va_mode; 388 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, 389 vp, NULL, genfs_can_chmod(vp, cred, attr->uid, 390 attr->gid, mode)); 391 if (error) 392 return error; 393 attr->mode = mode; 394 } 395 396 if ((vap->va_atime.tv_sec != VNOVAL) || 397 (vap->va_mtime.tv_sec != VNOVAL) || 398 (vap->va_ctime.tv_sec != VNOVAL)) { 399 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 400 NULL, genfs_can_chtimes(vp, cred, attr->uid, 401 vap->va_vaflags)); 402 if (error) 403 return error; 404 405 if (vap->va_atime.tv_sec != VNOVAL) 406 attr->atime = vap->va_atime.tv_sec; 407 if (vap->va_mtime.tv_sec != VNOVAL) 408 attr->mtime = vap->va_mtime.tv_sec; 409 if (vap->va_ctime.tv_sec != VNOVAL) 410 attr->ctime = vap->va_ctime.tv_sec; 411 } 412 413 bfs_inode_set_attr(bfs, inode, attr); 414 415 return 0; 416 } 417 418 int 419 sysvbfs_read(void *arg) 420 { 421 struct vop_read_args /* { 422 struct vnode *a_vp; 423 struct uio *a_uio; 424 int a_ioflag; 425 kauth_cred_t a_cred; 426 } */ *a = arg; 427 struct vnode *v = a->a_vp; 428 struct uio *uio = a->a_uio; 429 struct sysvbfs_node *bnode = v->v_data; 430 struct bfs_inode *inode = bnode->inode; 431 vsize_t sz, filesz = bfs_file_size(inode); 432 int err, uerr; 433 const int advice = IO_ADV_DECODE(a->a_ioflag); 434 435 DPRINTF("%s: type=%d\n", __func__, v->v_type); 436 switch (v->v_type) { 437 case VREG: 438 break; 439 case VDIR: 440 return EISDIR; 441 default: 442 return EINVAL; 443 } 444 445 err = 0; 446 while (uio->uio_resid > 0) { 447 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 448 break; 449 450 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 451 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(v)); 452 if (err) 453 break; 454 DPRINTF("%s: read %ldbyte\n", __func__, sz); 455 } 456 457 uerr = sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 458 if (err == 0) 459 err = uerr; 460 461 return err; 462 } 463 464 int 465 sysvbfs_write(void *arg) 466 { 467 struct vop_write_args /* { 468 struct vnode *a_vp; 469 struct uio *a_uio; 470 int a_ioflag; 471 kauth_cred_t a_cred; 472 } */ *a = arg; 473 struct vnode *v = a->a_vp; 474 struct uio *uio = a->a_uio; 475 int advice = IO_ADV_DECODE(a->a_ioflag); 476 struct sysvbfs_node *bnode = v->v_data; 477 vsize_t sz; 478 int err = 0; 479 480 if (a->a_vp->v_type != VREG) 481 return EISDIR; 482 483 if (a->a_ioflag & IO_APPEND) 484 uio->uio_offset = bnode->size; 485 486 if (uio->uio_resid == 0) 487 return 0; 488 489 if (bnode->size < uio->uio_offset + uio->uio_resid) { 490 sysvbfs_file_setsize(v, uio->uio_offset + uio->uio_resid); 491 } 492 493 while (uio->uio_resid > 0) { 494 sz = uio->uio_resid; 495 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 496 UBC_WRITE | UBC_VNODE_FLAGS(v)); 497 if (err) 498 break; 499 DPRINTF("%s: write %ldbyte\n", __func__, sz); 500 } 501 if (err) 502 sysvbfs_file_setsize(v, bnode->size - uio->uio_resid); 503 504 return err; 505 } 506 507 int 508 sysvbfs_remove(void *arg) 509 { 510 struct vop_remove_v3_args /* { 511 struct vnodeop_desc *a_desc; 512 struct vnode * a_dvp; 513 struct vnode * a_vp; 514 struct componentname * a_cnp; 515 nlink_t ctx_vp_new_nlink; 516 } */ *ap = arg; 517 struct vnode *vp = ap->a_vp; 518 struct vnode *dvp = ap->a_dvp; 519 struct sysvbfs_node *bnode = vp->v_data; 520 struct sysvbfs_mount *bmp = bnode->bmp; 521 struct bfs *bfs = bmp->bfs; 522 int err; 523 524 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 525 526 if (vp->v_type == VDIR) { 527 vrele(vp); 528 return EPERM; 529 } 530 531 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr, true)) != 0) 532 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 533 534 if (dvp == vp) 535 vrele(vp); 536 else 537 vput(vp); 538 539 if (err == 0) { 540 bnode->removed = 1; 541 } 542 543 return err; 544 } 545 546 int 547 sysvbfs_rename(void *arg) 548 { 549 struct vop_rename_args /* { 550 struct vnode *a_fdvp; from parent-directory v-node 551 struct vnode *a_fvp; from file v-node 552 struct componentname *a_fcnp; 553 struct vnode *a_tdvp; to parent-directory 554 struct vnode *a_tvp; to file v-node 555 struct componentname *a_tcnp; 556 } */ *ap = arg; 557 struct vnode *fvp = ap->a_fvp; 558 struct vnode *fdvp = ap->a_fdvp; 559 struct vnode *tvp = ap->a_tvp; 560 struct vnode *tdvp = ap->a_tdvp; 561 struct sysvbfs_node *bnode = fvp->v_data; 562 struct bfs *bfs = bnode->bmp->bfs; 563 const char *from_name = ap->a_fcnp->cn_nameptr; 564 const char *to_name = ap->a_tcnp->cn_nameptr; 565 int error; 566 567 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 568 if ((fvp->v_mount != tdvp->v_mount) || 569 (tvp && (fvp->v_mount != tvp->v_mount))) { 570 error = EXDEV; 571 printf("cross-device link\n"); 572 goto out; 573 } 574 575 KDASSERT(fvp->v_type == VREG); 576 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 577 KASSERT(tdvp == fdvp); 578 579 /* 580 * Make sure the source hasn't been removed between lookup 581 * and target directory lock. 582 */ 583 if (bnode->removed) { 584 error = ENOENT; 585 goto out; 586 } 587 588 /* 589 * Remove the target if it exists. 590 */ 591 if (tvp != NULL) { 592 error = bfs_file_delete(bfs, to_name, true); 593 if (error) 594 goto out; 595 } 596 error = bfs_file_rename(bfs, from_name, to_name); 597 out: 598 /* tdvp == tvp probably can't happen with this fs, but safety first */ 599 if (tdvp == tvp) 600 vrele(tdvp); 601 else 602 vput(tdvp); 603 if (tvp) 604 vput(tvp); 605 606 vrele(fdvp); 607 vrele(fvp); 608 609 return 0; 610 } 611 612 int 613 sysvbfs_readdir(void *v) 614 { 615 struct vop_readdir_args /* { 616 struct vnode *a_vp; 617 struct uio *a_uio; 618 kauth_cred_t a_cred; 619 int *a_eofflag; 620 off_t **a_cookies; 621 int *a_ncookies; 622 } */ *ap = v; 623 struct uio *uio = ap->a_uio; 624 struct vnode *vp = ap->a_vp; 625 struct sysvbfs_node *bnode = vp->v_data; 626 struct bfs *bfs = bnode->bmp->bfs; 627 struct dirent *dp; 628 struct bfs_dirent *file; 629 int i, n, error; 630 631 DPRINTF("%s: offset=%" PRId64 " residue=%zu\n", __func__, 632 uio->uio_offset, uio->uio_resid); 633 634 KDASSERT(vp->v_type == VDIR); 635 636 if (uio->uio_offset < 0) 637 return EINVAL; 638 639 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 640 641 i = uio->uio_offset / sizeof(struct dirent); 642 n = uio->uio_resid / sizeof(struct dirent); 643 if ((i + n) > bfs->n_dirent) 644 n = bfs->n_dirent - i; 645 646 DPRINTF("%s 1: %d %d %d\n", __func__, i, n, bfs->n_dirent); 647 for (file = &bfs->dirent[i]; n > 0; file++, i++) { 648 if (i == bfs->max_dirent) { 649 DPRINTF("%s: file system inconsistent.\n", 650 __func__); 651 break; 652 } 653 if (file->inode == 0) 654 continue; 655 656 /* ok, we have a live one here */ 657 n--; 658 memset(dp, 0, sizeof(struct dirent)); 659 dp->d_fileno = file->inode; 660 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 661 dp->d_namlen = strlen(file->name); 662 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 663 dp->d_reclen = sizeof(struct dirent); 664 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 665 DPRINTF("%s: uiomove failed.\n", __func__); 666 free(dp, M_BFS); 667 return error; 668 } 669 } 670 DPRINTF("%s 2: %d %d %d\n", __func__, i, n, bfs->n_dirent); 671 *ap->a_eofflag = (i == bfs->n_dirent); 672 673 free(dp, M_BFS); 674 return 0; 675 } 676 677 int 678 sysvbfs_inactive(void *arg) 679 { 680 struct vop_inactive_v2_args /* { 681 struct vnode *a_vp; 682 bool *a_recycle; 683 } */ *a = arg; 684 struct vnode *v = a->a_vp; 685 struct sysvbfs_node *bnode = v->v_data; 686 687 DPRINTF("%s:\n", __func__); 688 if (bnode->removed) 689 *a->a_recycle = true; 690 else 691 *a->a_recycle = false; 692 693 return 0; 694 } 695 696 int 697 sysvbfs_reclaim(void *v) 698 { 699 extern struct pool sysvbfs_node_pool; 700 struct vop_reclaim_v2_args /* { 701 struct vnode *a_vp; 702 } */ *ap = v; 703 struct vnode *vp = ap->a_vp; 704 struct sysvbfs_node *bnode = vp->v_data; 705 struct bfs *bfs = bnode->bmp->bfs; 706 707 VOP_UNLOCK(vp); 708 709 DPRINTF("%s:\n", __func__); 710 711 if (bnode->removed) { 712 if (bfs_inode_delete(bfs, bnode->inode->number) != 0) 713 DPRINTF("%s: delete inode failed\n", __func__); 714 } 715 genfs_node_destroy(vp); 716 pool_put(&sysvbfs_node_pool, bnode); 717 vp->v_data = NULL; 718 719 return 0; 720 } 721 722 int 723 sysvbfs_bmap(void *arg) 724 { 725 struct vop_bmap_args /* { 726 struct vnode *a_vp; 727 daddr_t a_bn; 728 struct vnode **a_vpp; 729 daddr_t *a_bnp; 730 int *a_runp; 731 } */ *a = arg; 732 struct vnode *v = a->a_vp; 733 struct sysvbfs_node *bnode = v->v_data; 734 struct sysvbfs_mount *bmp = bnode->bmp; 735 struct bfs_inode *inode = bnode->inode; 736 daddr_t blk; 737 738 DPRINTF("%s:\n", __func__); 739 /* BFS algorithm is contiguous allocation */ 740 blk = inode->start_sector + a->a_bn; 741 742 if (blk * BFS_BSIZE > bmp->bfs->data_end) 743 return ENOSPC; 744 745 *a->a_vpp = bmp->devvp; 746 *a->a_runp = 0; 747 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 748 a->a_bn); 749 750 *a->a_bnp = blk; 751 752 753 return 0; 754 } 755 756 int 757 sysvbfs_strategy(void *arg) 758 { 759 struct vop_strategy_args /* { 760 struct vnode *a_vp; 761 struct buf *a_bp; 762 } */ *a = arg; 763 struct buf *b = a->a_bp; 764 struct vnode *v = a->a_vp; 765 struct sysvbfs_node *bnode = v->v_data; 766 struct sysvbfs_mount *bmp = bnode->bmp; 767 int error; 768 769 DPRINTF("%s:\n", __func__); 770 KDASSERT(v->v_type == VREG); 771 if (b->b_blkno == b->b_lblkno) { 772 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 773 if (error) { 774 b->b_error = error; 775 biodone(b); 776 return error; 777 } 778 if ((long)b->b_blkno == -1) 779 clrbuf(b); 780 } 781 if ((long)b->b_blkno == -1) { 782 biodone(b); 783 return 0; 784 } 785 786 return VOP_STRATEGY(bmp->devvp, b); 787 } 788 789 int 790 sysvbfs_print(void *v) 791 { 792 struct vop_print_args /* { 793 struct vnode *a_vp; 794 } */ *ap = v; 795 struct sysvbfs_node *bnode = ap->a_vp->v_data; 796 797 DPRINTF("%s:\n", __func__); 798 bfs_dump(bnode->bmp->bfs); 799 800 return 0; 801 } 802 803 int 804 sysvbfs_advlock(void *v) 805 { 806 struct vop_advlock_args /* { 807 struct vnode *a_vp; 808 void *a_id; 809 int a_op; 810 struct flock *a_fl; 811 int a_flags; 812 } */ *ap = v; 813 struct sysvbfs_node *bnode = ap->a_vp->v_data; 814 815 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 816 817 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 818 } 819 820 int 821 sysvbfs_pathconf(void *v) 822 { 823 struct vop_pathconf_args /* { 824 struct vnode *a_vp; 825 int a_name; 826 register_t *a_retval; 827 } */ *ap = v; 828 829 DPRINTF("%s:\n", __func__); 830 831 switch (ap->a_name) { 832 case _PC_LINK_MAX: 833 *ap->a_retval = 1; 834 return 0; 835 case _PC_NAME_MAX: 836 *ap->a_retval = BFS_FILENAME_MAXLEN; 837 return 0; 838 case _PC_PATH_MAX: 839 *ap->a_retval = BFS_FILENAME_MAXLEN; 840 return 0; 841 case _PC_CHOWN_RESTRICTED: 842 *ap->a_retval = 1; 843 return 0; 844 case _PC_NO_TRUNC: 845 *ap->a_retval = 0; 846 return 0; 847 case _PC_SYNC_IO: 848 *ap->a_retval = 1; 849 return 0; 850 case _PC_FILESIZEBITS: 851 *ap->a_retval = 32; 852 return 0; 853 default: 854 return genfs_pathconf(ap); 855 } 856 } 857 858 int 859 sysvbfs_fsync(void *v) 860 { 861 struct vop_fsync_args /* { 862 struct vnode *a_vp; 863 kauth_cred_t a_cred; 864 int a_flags; 865 off_t offlo; 866 off_t offhi; 867 } */ *ap = v; 868 struct vnode *vp = ap->a_vp; 869 int error, wait; 870 871 if (ap->a_flags & FSYNC_CACHE) { 872 return EOPNOTSUPP; 873 } 874 875 wait = (ap->a_flags & FSYNC_WAIT) != 0; 876 error = vflushbuf(vp, ap->a_flags); 877 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 878 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 879 880 return error; 881 } 882 883 int 884 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 885 const struct timespec *mod, int flags) 886 { 887 struct sysvbfs_node *bnode = vp->v_data; 888 struct bfs_fileattr attr; 889 890 if (vp->v_mount->mnt_flag & MNT_RDONLY) 891 return 0; 892 893 DPRINTF("%s:\n", __func__); 894 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 895 if (bnode->update_atime) { 896 attr.atime = acc ? acc->tv_sec : time_second; 897 bnode->update_atime = false; 898 } 899 if (bnode->update_ctime) { 900 attr.ctime = time_second; 901 bnode->update_ctime = false; 902 } 903 if (bnode->update_mtime) { 904 attr.mtime = mod ? mod->tv_sec : time_second; 905 bnode->update_mtime = false; 906 } 907 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 908 909 return 0; 910 } 911 912 static void 913 sysvbfs_file_setsize(struct vnode *v, size_t size) 914 { 915 struct sysvbfs_node *bnode = v->v_data; 916 struct bfs_inode *inode = bnode->inode; 917 918 bnode->size = size; 919 uvm_vnp_setsize(v, bnode->size); 920 inode->end_sector = bnode->data_block + 921 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 922 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 923 bnode->size - 1; 924 bnode->update_mtime = true; 925 } 926