sysvbfs_vnops.c revision 1.63.16.1
1 /* $NetBSD: sysvbfs_vnops.c,v 1.63.16.1 2020/01/17 21:47:34 ad 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 1.63.16.1 2020/01/17 21:47:34 ad 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 mode_t mode, kauth_cred_t cred) 253 { 254 struct bfs_fileattr *attr = &bnode->inode->attr; 255 256 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 257 vp->v_type, attr->mode), vp, NULL, genfs_can_access(vp->v_type, 258 attr->mode, attr->uid, attr->gid, mode, cred)); 259 } 260 261 int 262 sysvbfs_access(void *arg) 263 { 264 struct vop_access_args /* { 265 struct vnode *a_vp; 266 int a_mode; 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_mode); 276 if (error) 277 return error; 278 279 error = sysvbfs_check_permitted(vp, bnode, ap->a_mode, 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(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->v_type, 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, vap->va_vaflags, attr->uid, 401 cred)); 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_UNMAP_FLAG(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 bool extended = false; 478 vsize_t sz; 479 int err = 0; 480 481 if (a->a_vp->v_type != VREG) 482 return EISDIR; 483 484 if (a->a_ioflag & IO_APPEND) 485 uio->uio_offset = bnode->size; 486 487 if (uio->uio_resid == 0) 488 return 0; 489 490 if (bnode->size < uio->uio_offset + uio->uio_resid) { 491 sysvbfs_file_setsize(v, uio->uio_offset + uio->uio_resid); 492 extended = true; 493 } 494 495 while (uio->uio_resid > 0) { 496 sz = uio->uio_resid; 497 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 498 UBC_WRITE | UBC_UNMAP_FLAG(v)); 499 if (err) 500 break; 501 DPRINTF("%s: write %ldbyte\n", __func__, sz); 502 } 503 if (err) 504 sysvbfs_file_setsize(v, bnode->size - uio->uio_resid); 505 506 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 507 508 return err; 509 } 510 511 int 512 sysvbfs_remove(void *arg) 513 { 514 struct vop_remove_v2_args /* { 515 struct vnodeop_desc *a_desc; 516 struct vnode * a_dvp; 517 struct vnode * a_vp; 518 struct componentname * a_cnp; 519 } */ *ap = arg; 520 struct vnode *vp = ap->a_vp; 521 struct vnode *dvp = ap->a_dvp; 522 struct sysvbfs_node *bnode = vp->v_data; 523 struct sysvbfs_mount *bmp = bnode->bmp; 524 struct bfs *bfs = bmp->bfs; 525 int err; 526 527 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 528 529 if (vp->v_type == VDIR) { 530 vrele(vp); 531 return EPERM; 532 } 533 534 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr, true)) != 0) 535 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 536 537 VN_KNOTE(ap->a_vp, NOTE_DELETE); 538 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 539 if (dvp == vp) 540 vrele(vp); 541 else 542 vput(vp); 543 544 if (err == 0) { 545 bnode->removed = 1; 546 } 547 548 return err; 549 } 550 551 int 552 sysvbfs_rename(void *arg) 553 { 554 struct vop_rename_args /* { 555 struct vnode *a_fdvp; from parent-directory v-node 556 struct vnode *a_fvp; from file v-node 557 struct componentname *a_fcnp; 558 struct vnode *a_tdvp; to parent-directory 559 struct vnode *a_tvp; to file v-node 560 struct componentname *a_tcnp; 561 } */ *ap = arg; 562 struct vnode *fvp = ap->a_fvp; 563 struct vnode *fdvp = ap->a_fdvp; 564 struct vnode *tvp = ap->a_tvp; 565 struct vnode *tdvp = ap->a_tdvp; 566 struct sysvbfs_node *bnode = fvp->v_data; 567 struct bfs *bfs = bnode->bmp->bfs; 568 const char *from_name = ap->a_fcnp->cn_nameptr; 569 const char *to_name = ap->a_tcnp->cn_nameptr; 570 int error; 571 572 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 573 if ((fvp->v_mount != tdvp->v_mount) || 574 (tvp && (fvp->v_mount != tvp->v_mount))) { 575 error = EXDEV; 576 printf("cross-device link\n"); 577 goto out; 578 } 579 580 KDASSERT(fvp->v_type == VREG); 581 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 582 KASSERT(tdvp == fdvp); 583 584 /* 585 * Make sure the source hasn't been removed between lookup 586 * and target directory lock. 587 */ 588 if (bnode->removed) { 589 error = ENOENT; 590 goto out; 591 } 592 593 /* 594 * Remove the target if it exists. 595 */ 596 if (tvp != NULL) { 597 error = bfs_file_delete(bfs, to_name, true); 598 if (error) 599 goto out; 600 } 601 error = bfs_file_rename(bfs, from_name, to_name); 602 out: 603 /* tdvp == tvp probably can't happen with this fs, but safety first */ 604 if (tdvp == tvp) 605 vrele(tdvp); 606 else 607 vput(tdvp); 608 if (tvp) 609 vput(tvp); 610 611 vrele(fdvp); 612 vrele(fvp); 613 614 return 0; 615 } 616 617 int 618 sysvbfs_readdir(void *v) 619 { 620 struct vop_readdir_args /* { 621 struct vnode *a_vp; 622 struct uio *a_uio; 623 kauth_cred_t a_cred; 624 int *a_eofflag; 625 off_t **a_cookies; 626 int *a_ncookies; 627 } */ *ap = v; 628 struct uio *uio = ap->a_uio; 629 struct vnode *vp = ap->a_vp; 630 struct sysvbfs_node *bnode = vp->v_data; 631 struct bfs *bfs = bnode->bmp->bfs; 632 struct dirent *dp; 633 struct bfs_dirent *file; 634 int i, n, error; 635 636 DPRINTF("%s: offset=%" PRId64 " residue=%zu\n", __func__, 637 uio->uio_offset, uio->uio_resid); 638 639 KDASSERT(vp->v_type == VDIR); 640 KDASSERT(uio->uio_offset >= 0); 641 642 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 643 644 i = uio->uio_offset / sizeof(struct dirent); 645 n = uio->uio_resid / sizeof(struct dirent); 646 if ((i + n) > bfs->n_dirent) 647 n = bfs->n_dirent - i; 648 649 DPRINTF("%s 1: %d %d %d\n", __func__, i, n, bfs->n_dirent); 650 for (file = &bfs->dirent[i]; n > 0; file++, i++) { 651 if (i == bfs->max_dirent) { 652 DPRINTF("%s: file system inconsistent.\n", 653 __func__); 654 break; 655 } 656 if (file->inode == 0) 657 continue; 658 659 /* ok, we have a live one here */ 660 n--; 661 memset(dp, 0, sizeof(struct dirent)); 662 dp->d_fileno = file->inode; 663 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 664 dp->d_namlen = strlen(file->name); 665 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 666 dp->d_reclen = sizeof(struct dirent); 667 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 668 DPRINTF("%s: uiomove failed.\n", __func__); 669 free(dp, M_BFS); 670 return error; 671 } 672 } 673 DPRINTF("%s 2: %d %d %d\n", __func__, i, n, bfs->n_dirent); 674 *ap->a_eofflag = (i == bfs->n_dirent); 675 676 free(dp, M_BFS); 677 return 0; 678 } 679 680 int 681 sysvbfs_inactive(void *arg) 682 { 683 struct vop_inactive_v2_args /* { 684 struct vnode *a_vp; 685 bool *a_recycle; 686 } */ *a = arg; 687 struct vnode *v = a->a_vp; 688 struct sysvbfs_node *bnode = v->v_data; 689 690 DPRINTF("%s:\n", __func__); 691 if (bnode->removed) 692 *a->a_recycle = true; 693 else 694 *a->a_recycle = false; 695 696 return 0; 697 } 698 699 int 700 sysvbfs_reclaim(void *v) 701 { 702 extern struct pool sysvbfs_node_pool; 703 struct vop_reclaim_v2_args /* { 704 struct vnode *a_vp; 705 } */ *ap = v; 706 struct vnode *vp = ap->a_vp; 707 struct sysvbfs_node *bnode = vp->v_data; 708 struct bfs *bfs = bnode->bmp->bfs; 709 710 VOP_UNLOCK(vp); 711 712 DPRINTF("%s:\n", __func__); 713 714 if (bnode->removed) { 715 if (bfs_inode_delete(bfs, bnode->inode->number) != 0) 716 DPRINTF("%s: delete inode failed\n", __func__); 717 } 718 genfs_node_destroy(vp); 719 pool_put(&sysvbfs_node_pool, bnode); 720 vp->v_data = NULL; 721 722 return 0; 723 } 724 725 int 726 sysvbfs_bmap(void *arg) 727 { 728 struct vop_bmap_args /* { 729 struct vnode *a_vp; 730 daddr_t a_bn; 731 struct vnode **a_vpp; 732 daddr_t *a_bnp; 733 int *a_runp; 734 } */ *a = arg; 735 struct vnode *v = a->a_vp; 736 struct sysvbfs_node *bnode = v->v_data; 737 struct sysvbfs_mount *bmp = bnode->bmp; 738 struct bfs_inode *inode = bnode->inode; 739 daddr_t blk; 740 741 DPRINTF("%s:\n", __func__); 742 /* BFS algorithm is contiguous allocation */ 743 blk = inode->start_sector + a->a_bn; 744 745 if (blk * BFS_BSIZE > bmp->bfs->data_end) 746 return ENOSPC; 747 748 *a->a_vpp = bmp->devvp; 749 *a->a_runp = 0; 750 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 751 a->a_bn); 752 753 *a->a_bnp = blk; 754 755 756 return 0; 757 } 758 759 int 760 sysvbfs_strategy(void *arg) 761 { 762 struct vop_strategy_args /* { 763 struct vnode *a_vp; 764 struct buf *a_bp; 765 } */ *a = arg; 766 struct buf *b = a->a_bp; 767 struct vnode *v = a->a_vp; 768 struct sysvbfs_node *bnode = v->v_data; 769 struct sysvbfs_mount *bmp = bnode->bmp; 770 int error; 771 772 DPRINTF("%s:\n", __func__); 773 KDASSERT(v->v_type == VREG); 774 if (b->b_blkno == b->b_lblkno) { 775 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 776 if (error) { 777 b->b_error = error; 778 biodone(b); 779 return error; 780 } 781 if ((long)b->b_blkno == -1) 782 clrbuf(b); 783 } 784 if ((long)b->b_blkno == -1) { 785 biodone(b); 786 return 0; 787 } 788 789 return VOP_STRATEGY(bmp->devvp, b); 790 } 791 792 int 793 sysvbfs_print(void *v) 794 { 795 struct vop_print_args /* { 796 struct vnode *a_vp; 797 } */ *ap = v; 798 struct sysvbfs_node *bnode = ap->a_vp->v_data; 799 800 DPRINTF("%s:\n", __func__); 801 bfs_dump(bnode->bmp->bfs); 802 803 return 0; 804 } 805 806 int 807 sysvbfs_advlock(void *v) 808 { 809 struct vop_advlock_args /* { 810 struct vnode *a_vp; 811 void *a_id; 812 int a_op; 813 struct flock *a_fl; 814 int a_flags; 815 } */ *ap = v; 816 struct sysvbfs_node *bnode = ap->a_vp->v_data; 817 818 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 819 820 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 821 } 822 823 int 824 sysvbfs_pathconf(void *v) 825 { 826 struct vop_pathconf_args /* { 827 struct vnode *a_vp; 828 int a_name; 829 register_t *a_retval; 830 } */ *ap = v; 831 int err = 0; 832 833 DPRINTF("%s:\n", __func__); 834 835 switch (ap->a_name) { 836 case _PC_LINK_MAX: 837 *ap->a_retval = 1; 838 break; 839 case _PC_NAME_MAX: 840 *ap->a_retval = BFS_FILENAME_MAXLEN; 841 break; 842 case _PC_PATH_MAX: 843 *ap->a_retval = BFS_FILENAME_MAXLEN; 844 break; 845 case _PC_CHOWN_RESTRICTED: 846 *ap->a_retval = 1; 847 break; 848 case _PC_NO_TRUNC: 849 *ap->a_retval = 0; 850 break; 851 case _PC_SYNC_IO: 852 *ap->a_retval = 1; 853 break; 854 case _PC_FILESIZEBITS: 855 *ap->a_retval = 32; 856 break; 857 default: 858 err = EINVAL; 859 break; 860 } 861 862 return err; 863 } 864 865 int 866 sysvbfs_fsync(void *v) 867 { 868 struct vop_fsync_args /* { 869 struct vnode *a_vp; 870 kauth_cred_t a_cred; 871 int a_flags; 872 off_t offlo; 873 off_t offhi; 874 } */ *ap = v; 875 struct vnode *vp = ap->a_vp; 876 int error, wait; 877 878 if (ap->a_flags & FSYNC_CACHE) { 879 return EOPNOTSUPP; 880 } 881 882 wait = (ap->a_flags & FSYNC_WAIT) != 0; 883 error = vflushbuf(vp, ap->a_flags); 884 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 885 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 886 887 return error; 888 } 889 890 int 891 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 892 const struct timespec *mod, int flags) 893 { 894 struct sysvbfs_node *bnode = vp->v_data; 895 struct bfs_fileattr attr; 896 897 if (vp->v_mount->mnt_flag & MNT_RDONLY) 898 return 0; 899 900 DPRINTF("%s:\n", __func__); 901 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 902 if (bnode->update_atime) { 903 attr.atime = acc ? acc->tv_sec : time_second; 904 bnode->update_atime = false; 905 } 906 if (bnode->update_ctime) { 907 attr.ctime = time_second; 908 bnode->update_ctime = false; 909 } 910 if (bnode->update_mtime) { 911 attr.mtime = mod ? mod->tv_sec : time_second; 912 bnode->update_mtime = false; 913 } 914 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 915 916 return 0; 917 } 918 919 static void 920 sysvbfs_file_setsize(struct vnode *v, size_t size) 921 { 922 struct sysvbfs_node *bnode = v->v_data; 923 struct bfs_inode *inode = bnode->inode; 924 925 bnode->size = size; 926 uvm_vnp_setsize(v, bnode->size); 927 inode->end_sector = bnode->data_block + 928 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 929 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 930 bnode->size - 1; 931 bnode->update_mtime = true; 932 } 933
Indexes created Mon Sep 29 21:09:56 GMT 2025