sysvbfs_vnops.c revision 1.68
1 /* $NetBSD: sysvbfs_vnops.c,v 1.68 2021/10/20 03:08:17 thorpej 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 1.68 2021/10/20 03:08:17 thorpej 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 KDASSERT(uio->uio_offset >= 0); 636 637 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 638 639 i = uio->uio_offset / sizeof(struct dirent); 640 n = uio->uio_resid / sizeof(struct dirent); 641 if ((i + n) > bfs->n_dirent) 642 n = bfs->n_dirent - i; 643 644 DPRINTF("%s 1: %d %d %d\n", __func__, i, n, bfs->n_dirent); 645 for (file = &bfs->dirent[i]; n > 0; file++, i++) { 646 if (i == bfs->max_dirent) { 647 DPRINTF("%s: file system inconsistent.\n", 648 __func__); 649 break; 650 } 651 if (file->inode == 0) 652 continue; 653 654 /* ok, we have a live one here */ 655 n--; 656 memset(dp, 0, sizeof(struct dirent)); 657 dp->d_fileno = file->inode; 658 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 659 dp->d_namlen = strlen(file->name); 660 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 661 dp->d_reclen = sizeof(struct dirent); 662 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 663 DPRINTF("%s: uiomove failed.\n", __func__); 664 free(dp, M_BFS); 665 return error; 666 } 667 } 668 DPRINTF("%s 2: %d %d %d\n", __func__, i, n, bfs->n_dirent); 669 *ap->a_eofflag = (i == bfs->n_dirent); 670 671 free(dp, M_BFS); 672 return 0; 673 } 674 675 int 676 sysvbfs_inactive(void *arg) 677 { 678 struct vop_inactive_v2_args /* { 679 struct vnode *a_vp; 680 bool *a_recycle; 681 } */ *a = arg; 682 struct vnode *v = a->a_vp; 683 struct sysvbfs_node *bnode = v->v_data; 684 685 DPRINTF("%s:\n", __func__); 686 if (bnode->removed) 687 *a->a_recycle = true; 688 else 689 *a->a_recycle = false; 690 691 return 0; 692 } 693 694 int 695 sysvbfs_reclaim(void *v) 696 { 697 extern struct pool sysvbfs_node_pool; 698 struct vop_reclaim_v2_args /* { 699 struct vnode *a_vp; 700 } */ *ap = v; 701 struct vnode *vp = ap->a_vp; 702 struct sysvbfs_node *bnode = vp->v_data; 703 struct bfs *bfs = bnode->bmp->bfs; 704 705 VOP_UNLOCK(vp); 706 707 DPRINTF("%s:\n", __func__); 708 709 if (bnode->removed) { 710 if (bfs_inode_delete(bfs, bnode->inode->number) != 0) 711 DPRINTF("%s: delete inode failed\n", __func__); 712 } 713 genfs_node_destroy(vp); 714 pool_put(&sysvbfs_node_pool, bnode); 715 vp->v_data = NULL; 716 717 return 0; 718 } 719 720 int 721 sysvbfs_bmap(void *arg) 722 { 723 struct vop_bmap_args /* { 724 struct vnode *a_vp; 725 daddr_t a_bn; 726 struct vnode **a_vpp; 727 daddr_t *a_bnp; 728 int *a_runp; 729 } */ *a = arg; 730 struct vnode *v = a->a_vp; 731 struct sysvbfs_node *bnode = v->v_data; 732 struct sysvbfs_mount *bmp = bnode->bmp; 733 struct bfs_inode *inode = bnode->inode; 734 daddr_t blk; 735 736 DPRINTF("%s:\n", __func__); 737 /* BFS algorithm is contiguous allocation */ 738 blk = inode->start_sector + a->a_bn; 739 740 if (blk * BFS_BSIZE > bmp->bfs->data_end) 741 return ENOSPC; 742 743 *a->a_vpp = bmp->devvp; 744 *a->a_runp = 0; 745 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 746 a->a_bn); 747 748 *a->a_bnp = blk; 749 750 751 return 0; 752 } 753 754 int 755 sysvbfs_strategy(void *arg) 756 { 757 struct vop_strategy_args /* { 758 struct vnode *a_vp; 759 struct buf *a_bp; 760 } */ *a = arg; 761 struct buf *b = a->a_bp; 762 struct vnode *v = a->a_vp; 763 struct sysvbfs_node *bnode = v->v_data; 764 struct sysvbfs_mount *bmp = bnode->bmp; 765 int error; 766 767 DPRINTF("%s:\n", __func__); 768 KDASSERT(v->v_type == VREG); 769 if (b->b_blkno == b->b_lblkno) { 770 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 771 if (error) { 772 b->b_error = error; 773 biodone(b); 774 return error; 775 } 776 if ((long)b->b_blkno == -1) 777 clrbuf(b); 778 } 779 if ((long)b->b_blkno == -1) { 780 biodone(b); 781 return 0; 782 } 783 784 return VOP_STRATEGY(bmp->devvp, b); 785 } 786 787 int 788 sysvbfs_print(void *v) 789 { 790 struct vop_print_args /* { 791 struct vnode *a_vp; 792 } */ *ap = v; 793 struct sysvbfs_node *bnode = ap->a_vp->v_data; 794 795 DPRINTF("%s:\n", __func__); 796 bfs_dump(bnode->bmp->bfs); 797 798 return 0; 799 } 800 801 int 802 sysvbfs_advlock(void *v) 803 { 804 struct vop_advlock_args /* { 805 struct vnode *a_vp; 806 void *a_id; 807 int a_op; 808 struct flock *a_fl; 809 int a_flags; 810 } */ *ap = v; 811 struct sysvbfs_node *bnode = ap->a_vp->v_data; 812 813 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 814 815 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 816 } 817 818 int 819 sysvbfs_pathconf(void *v) 820 { 821 struct vop_pathconf_args /* { 822 struct vnode *a_vp; 823 int a_name; 824 register_t *a_retval; 825 } */ *ap = v; 826 827 DPRINTF("%s:\n", __func__); 828 829 switch (ap->a_name) { 830 case _PC_LINK_MAX: 831 *ap->a_retval = 1; 832 return 0; 833 case _PC_NAME_MAX: 834 *ap->a_retval = BFS_FILENAME_MAXLEN; 835 return 0; 836 case _PC_PATH_MAX: 837 *ap->a_retval = BFS_FILENAME_MAXLEN; 838 return 0; 839 case _PC_CHOWN_RESTRICTED: 840 *ap->a_retval = 1; 841 return 0; 842 case _PC_NO_TRUNC: 843 *ap->a_retval = 0; 844 return 0; 845 case _PC_SYNC_IO: 846 *ap->a_retval = 1; 847 return 0; 848 case _PC_FILESIZEBITS: 849 *ap->a_retval = 32; 850 return 0; 851 default: 852 return genfs_pathconf(ap); 853 } 854 } 855 856 int 857 sysvbfs_fsync(void *v) 858 { 859 struct vop_fsync_args /* { 860 struct vnode *a_vp; 861 kauth_cred_t a_cred; 862 int a_flags; 863 off_t offlo; 864 off_t offhi; 865 } */ *ap = v; 866 struct vnode *vp = ap->a_vp; 867 int error, wait; 868 869 if (ap->a_flags & FSYNC_CACHE) { 870 return EOPNOTSUPP; 871 } 872 873 wait = (ap->a_flags & FSYNC_WAIT) != 0; 874 error = vflushbuf(vp, ap->a_flags); 875 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 876 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 877 878 return error; 879 } 880 881 int 882 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 883 const struct timespec *mod, int flags) 884 { 885 struct sysvbfs_node *bnode = vp->v_data; 886 struct bfs_fileattr attr; 887 888 if (vp->v_mount->mnt_flag & MNT_RDONLY) 889 return 0; 890 891 DPRINTF("%s:\n", __func__); 892 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 893 if (bnode->update_atime) { 894 attr.atime = acc ? acc->tv_sec : time_second; 895 bnode->update_atime = false; 896 } 897 if (bnode->update_ctime) { 898 attr.ctime = time_second; 899 bnode->update_ctime = false; 900 } 901 if (bnode->update_mtime) { 902 attr.mtime = mod ? mod->tv_sec : time_second; 903 bnode->update_mtime = false; 904 } 905 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 906 907 return 0; 908 } 909 910 static void 911 sysvbfs_file_setsize(struct vnode *v, size_t size) 912 { 913 struct sysvbfs_node *bnode = v->v_data; 914 struct bfs_inode *inode = bnode->inode; 915 916 bnode->size = size; 917 uvm_vnp_setsize(v, bnode->size); 918 inode->end_sector = bnode->data_block + 919 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 920 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 921 bnode->size - 1; 922 bnode->update_mtime = true; 923 } 924
Indexes created Sun Sep 21 19:09:51 GMT 2025