sysvbfs_vnops.c revision 1.35.4.1
1 /* $NetBSD: sysvbfs_vnops.c,v 1.35.4.1 2011/02/08 16:19:58 bouyer 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 1.35.4.1 2011/02/08 16:19:58 bouyer 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 int 64 sysvbfs_lookup(void *arg) 65 { 66 struct vop_lookup_args /* { 67 struct vnode *a_dvp; 68 struct vnode **a_vpp; 69 struct componentname *a_cnp; 70 } */ *a = arg; 71 struct vnode *v = a->a_dvp; 72 struct sysvbfs_node *bnode = v->v_data; 73 struct bfs *bfs = bnode->bmp->bfs; /* my filesystem */ 74 struct vnode *vpp = NULL; 75 struct bfs_dirent *dirent = NULL; 76 struct componentname *cnp = a->a_cnp; 77 int nameiop = cnp->cn_nameiop; 78 const char *name = cnp->cn_nameptr; 79 int namelen = cnp->cn_namelen; 80 int error; 81 82 DPRINTF("%s: %s op=%d %d\n", __func__, name, nameiop, 83 cnp->cn_flags); 84 85 *a->a_vpp = NULL; 86 87 KASSERT((cnp->cn_flags & ISDOTDOT) == 0); 88 89 if ((error = VOP_ACCESS(a->a_dvp, VEXEC, cnp->cn_cred)) != 0) { 90 return error; /* directory permission. */ 91 } 92 93 /* Deny last component write operation on a read-only mount */ 94 if ((cnp->cn_flags & ISLASTCN) && (v->v_mount->mnt_flag & MNT_RDONLY) && 95 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 96 return EROFS; 97 98 if (namelen == 1 && name[0] == '.') { /* "." */ 99 vref(v); 100 *a->a_vpp = v; 101 } else { /* Regular file */ 102 if (!bfs_dirent_lookup_by_name(bfs, cnp->cn_nameptr, 103 &dirent)) { 104 if (nameiop != CREATE && nameiop != RENAME) { 105 DPRINTF("%s: no such a file. (1)\n", 106 __func__); 107 return ENOENT; 108 } 109 if ((error = VOP_ACCESS(v, VWRITE, cnp->cn_cred)) != 0) 110 return error; 111 return EJUSTRETURN; 112 } 113 114 /* Allocate v-node */ 115 if ((error = sysvbfs_vget(v->v_mount, dirent->inode, &vpp)) != 0) { 116 DPRINTF("%s: can't get vnode.\n", __func__); 117 return error; 118 } 119 *a->a_vpp = vpp; 120 } 121 122 return 0; 123 } 124 125 int 126 sysvbfs_create(void *arg) 127 { 128 struct vop_create_args /* { 129 struct vnode *a_dvp; 130 struct vnode **a_vpp; 131 struct componentname *a_cnp; 132 struct vattr *a_vap; 133 } */ *a = arg; 134 struct sysvbfs_node *bnode = a->a_dvp->v_data; 135 struct sysvbfs_mount *bmp = bnode->bmp; 136 struct bfs *bfs = bmp->bfs; 137 struct mount *mp = bmp->mountp; 138 struct bfs_dirent *dirent; 139 struct bfs_fileattr attr; 140 struct vattr *va = a->a_vap; 141 kauth_cred_t cr = a->a_cnp->cn_cred; 142 int err = 0; 143 144 DPRINTF("%s: %s\n", __func__, a->a_cnp->cn_nameptr); 145 KDASSERT(a->a_vap->va_type == VREG); 146 attr.uid = kauth_cred_geteuid(cr); 147 attr.gid = kauth_cred_getegid(cr); 148 attr.mode = va->va_mode; 149 150 if ((err = bfs_file_create(bfs, a->a_cnp->cn_nameptr, 0, 0, &attr)) 151 != 0) { 152 DPRINTF("%s: bfs_file_create failed.\n", __func__); 153 goto unlock_exit; 154 } 155 156 if (!bfs_dirent_lookup_by_name(bfs, a->a_cnp->cn_nameptr, &dirent)) 157 panic("no dirent for created file."); 158 159 if ((err = sysvbfs_vget(mp, dirent->inode, a->a_vpp)) != 0) { 160 DPRINTF("%s: sysvbfs_vget failed.\n", __func__); 161 goto unlock_exit; 162 } 163 bnode = (*a->a_vpp)->v_data; 164 bnode->update_ctime = true; 165 bnode->update_mtime = true; 166 bnode->update_atime = true; 167 168 unlock_exit: 169 /* unlock parent directory */ 170 vput(a->a_dvp); /* locked at sysvbfs_lookup(); */ 171 172 return err; 173 } 174 175 int 176 sysvbfs_open(void *arg) 177 { 178 struct vop_open_args /* { 179 struct vnode *a_vp; 180 int a_mode; 181 kauth_cred_t a_cred; 182 } */ *a = arg; 183 struct vnode *v = a->a_vp; 184 struct sysvbfs_node *bnode = v->v_data; 185 struct bfs_inode *inode = bnode->inode; 186 struct bfs *bfs = bnode->bmp->bfs; 187 struct bfs_dirent *dirent; 188 189 DPRINTF("%s:\n", __func__); 190 KDASSERT(v->v_type == VREG || v->v_type == VDIR); 191 192 if (!bfs_dirent_lookup_by_inode(bfs, inode->number, &dirent)) 193 return ENOENT; 194 bnode->update_atime = true; 195 if ((a->a_mode & FWRITE) && !(a->a_mode & O_APPEND)) { 196 bnode->size = 0; 197 } else { 198 bnode->size = bfs_file_size(inode); 199 } 200 bnode->data_block = inode->start_sector; 201 202 return 0; 203 } 204 205 int 206 sysvbfs_close(void *arg) 207 { 208 struct vop_close_args /* { 209 struct vnodeop_desc *a_desc; 210 struct vnode *a_vp; 211 int a_fflag; 212 kauth_cred_t a_cred; 213 } */ *a = arg; 214 struct vnode *v = a->a_vp; 215 struct sysvbfs_node *bnode = v->v_data; 216 struct bfs_fileattr attr; 217 218 DPRINTF("%s:\n", __func__); 219 uvm_vnp_setsize(v, bnode->size); 220 221 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 222 if (bnode->update_atime) 223 attr.atime = time_second; 224 if (bnode->update_ctime) 225 attr.ctime = time_second; 226 if (bnode->update_mtime) 227 attr.mtime = time_second; 228 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 229 230 VOP_FSYNC(a->a_vp, a->a_cred, FSYNC_WAIT, 0, 0); 231 232 return 0; 233 } 234 235 static int 236 sysvbfs_check_possible(struct vnode *vp, struct sysvbfs_node *bnode, 237 mode_t mode) 238 { 239 240 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 241 return EROFS; 242 243 return 0; 244 } 245 246 static int 247 sysvbfs_check_permitted(struct vnode *vp, struct sysvbfs_node *bnode, 248 mode_t mode, kauth_cred_t cred) 249 { 250 struct bfs_fileattr *attr = &bnode->inode->attr; 251 252 return genfs_can_access(vp->v_type, attr->mode, attr->uid, attr->gid, 253 mode, cred); 254 } 255 256 int 257 sysvbfs_access(void *arg) 258 { 259 struct vop_access_args /* { 260 struct vnode *a_vp; 261 int a_mode; 262 kauth_cred_t a_cred; 263 } */ *ap = arg; 264 struct vnode *vp = ap->a_vp; 265 struct sysvbfs_node *bnode = vp->v_data; 266 int error; 267 268 DPRINTF("%s:\n", __func__); 269 270 error = sysvbfs_check_possible(vp, bnode, ap->a_mode); 271 if (error) 272 return error; 273 274 error = sysvbfs_check_permitted(vp, bnode, ap->a_mode, ap->a_cred); 275 276 return error; 277 } 278 279 int 280 sysvbfs_getattr(void *v) 281 { 282 struct vop_getattr_args /* { 283 struct vnode *a_vp; 284 struct vattr *a_vap; 285 kauth_cred_t a_cred; 286 } */ *ap = v; 287 struct vnode *vp = ap->a_vp; 288 struct sysvbfs_node *bnode = vp->v_data; 289 struct bfs_inode *inode = bnode->inode; 290 struct bfs_fileattr *attr = &inode->attr; 291 struct sysvbfs_mount *bmp = bnode->bmp; 292 struct vattr *vap = ap->a_vap; 293 294 DPRINTF("%s:\n", __func__); 295 296 vap->va_type = vp->v_type; 297 vap->va_mode = attr->mode; 298 vap->va_nlink = attr->nlink; 299 vap->va_uid = attr->uid; 300 vap->va_gid = attr->gid; 301 vap->va_fsid = bmp->devvp->v_rdev; 302 vap->va_fileid = inode->number; 303 vap->va_size = bfs_file_size(inode); 304 vap->va_blocksize = BFS_BSIZE; 305 vap->va_atime.tv_sec = attr->atime; 306 vap->va_mtime.tv_sec = attr->mtime; 307 vap->va_ctime.tv_sec = attr->ctime; 308 vap->va_birthtime.tv_sec = 0; 309 vap->va_gen = 1; 310 vap->va_flags = 0; 311 vap->va_rdev = 0; /* No device file */ 312 vap->va_bytes = vap->va_size; 313 vap->va_filerev = 0; 314 vap->va_vaflags = 0; 315 316 return 0; 317 } 318 319 int 320 sysvbfs_setattr(void *arg) 321 { 322 struct vop_setattr_args /* { 323 struct vnode *a_vp; 324 struct vattr *a_vap; 325 kauth_cred_t a_cred; 326 struct proc *p; 327 } */ *ap = arg; 328 struct vnode *vp = ap->a_vp; 329 struct vattr *vap = ap->a_vap; 330 struct sysvbfs_node *bnode = vp->v_data; 331 struct bfs_inode *inode = bnode->inode; 332 struct bfs_fileattr *attr = &inode->attr; 333 struct bfs *bfs = bnode->bmp->bfs; 334 335 DPRINTF("%s:\n", __func__); 336 if (vp->v_mount->mnt_flag & MNT_RDONLY) 337 return EROFS; 338 339 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 340 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 341 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 342 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) 343 return EINVAL; 344 345 if (vap->va_uid != (uid_t)VNOVAL) 346 attr->uid = vap->va_uid; 347 if (vap->va_gid != (uid_t)VNOVAL) 348 attr->gid = vap->va_gid; 349 if (vap->va_mode != (mode_t)VNOVAL) 350 attr->mode = vap->va_mode; 351 if (vap->va_atime.tv_sec != VNOVAL) 352 attr->atime = vap->va_atime.tv_sec; 353 if (vap->va_mtime.tv_sec != VNOVAL) 354 attr->mtime = vap->va_mtime.tv_sec; 355 if (vap->va_ctime.tv_sec != VNOVAL) 356 attr->ctime = vap->va_ctime.tv_sec; 357 358 bfs_inode_set_attr(bfs, inode, attr); 359 360 return 0; 361 } 362 363 int 364 sysvbfs_read(void *arg) 365 { 366 struct vop_read_args /* { 367 struct vnode *a_vp; 368 struct uio *a_uio; 369 int a_ioflag; 370 kauth_cred_t a_cred; 371 } */ *a = arg; 372 struct vnode *v = a->a_vp; 373 struct uio *uio = a->a_uio; 374 struct sysvbfs_node *bnode = v->v_data; 375 struct bfs_inode *inode = bnode->inode; 376 vsize_t sz, filesz = bfs_file_size(inode); 377 int err; 378 const int advice = IO_ADV_DECODE(a->a_ioflag); 379 380 DPRINTF("%s: type=%d\n", __func__, v->v_type); 381 if (v->v_type != VREG) 382 return EINVAL; 383 384 while (uio->uio_resid > 0) { 385 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 386 break; 387 388 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 389 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(v)); 390 if (err) 391 break; 392 DPRINTF("%s: read %ldbyte\n", __func__, sz); 393 } 394 395 return sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 396 } 397 398 int 399 sysvbfs_write(void *arg) 400 { 401 struct vop_write_args /* { 402 struct vnode *a_vp; 403 struct uio *a_uio; 404 int a_ioflag; 405 kauth_cred_t a_cred; 406 } */ *a = arg; 407 struct vnode *v = a->a_vp; 408 struct uio *uio = a->a_uio; 409 int advice = IO_ADV_DECODE(a->a_ioflag); 410 struct sysvbfs_node *bnode = v->v_data; 411 struct bfs_inode *inode = bnode->inode; 412 bool extended = false; 413 vsize_t sz; 414 int err = 0; 415 416 if (a->a_vp->v_type != VREG) 417 return EISDIR; 418 419 if (a->a_ioflag & IO_APPEND) 420 uio->uio_offset = bnode->size; 421 422 if (uio->uio_resid == 0) 423 return 0; 424 425 if (bnode->size < uio->uio_offset + uio->uio_resid) { 426 bnode->size = uio->uio_offset + uio->uio_resid; 427 uvm_vnp_setsize(v, bnode->size); 428 extended = true; 429 } 430 431 while (uio->uio_resid > 0) { 432 sz = uio->uio_resid; 433 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 434 UBC_WRITE | UBC_UNMAP_FLAG(v)); 435 if (err) 436 break; 437 DPRINTF("%s: write %ldbyte\n", __func__, sz); 438 } 439 inode->end_sector = bnode->data_block + 440 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 441 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 442 bnode->size - 1; 443 bnode->update_mtime = true; 444 445 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 446 447 return err; 448 } 449 450 int 451 sysvbfs_remove(void *arg) 452 { 453 struct vop_remove_args /* { 454 struct vnodeop_desc *a_desc; 455 struct vnode * a_dvp; 456 struct vnode * a_vp; 457 struct componentname * a_cnp; 458 } */ *ap = arg; 459 struct vnode *vp = ap->a_vp; 460 struct vnode *dvp = ap->a_dvp; 461 struct sysvbfs_node *bnode = vp->v_data; 462 struct sysvbfs_mount *bmp = bnode->bmp; 463 struct bfs *bfs = bmp->bfs; 464 int err; 465 466 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 467 468 if (vp->v_type == VDIR) 469 return EPERM; 470 471 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr)) != 0) 472 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 473 474 VN_KNOTE(ap->a_vp, NOTE_DELETE); 475 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 476 if (dvp == vp) 477 vrele(vp); 478 else 479 vput(vp); 480 vput(dvp); 481 482 if (err == 0) { 483 bnode->removed = 1; 484 } 485 486 return err; 487 } 488 489 int 490 sysvbfs_rename(void *arg) 491 { 492 struct vop_rename_args /* { 493 struct vnode *a_fdvp; from parent-directory v-node 494 struct vnode *a_fvp; from file v-node 495 struct componentname *a_fcnp; 496 struct vnode *a_tdvp; to parent-directory 497 struct vnode *a_tvp; to file v-node 498 struct componentname *a_tcnp; 499 } */ *ap = arg; 500 struct vnode *fvp = ap->a_fvp; 501 struct vnode *fdvp = ap->a_fdvp; 502 struct vnode *tvp = ap->a_tvp; 503 struct vnode *tdvp = ap->a_tdvp; 504 struct sysvbfs_node *bnode = fvp->v_data; 505 struct bfs *bfs = bnode->bmp->bfs; 506 const char *from_name = ap->a_fcnp->cn_nameptr; 507 const char *to_name = ap->a_tcnp->cn_nameptr; 508 int error; 509 510 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 511 if ((fvp->v_mount != tdvp->v_mount) || 512 (tvp && (fvp->v_mount != tvp->v_mount))) { 513 error = EXDEV; 514 printf("cross-device link\n"); 515 goto out; 516 } 517 518 KDASSERT(fvp->v_type == VREG); 519 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 520 KASSERT(tdvp == fdvp); 521 522 /* 523 * Make sure the source hasn't been removed between lookup 524 * and target directory lock. 525 */ 526 if (bnode->removed) { 527 error = ENOENT; 528 goto out; 529 } 530 531 error = bfs_file_rename(bfs, from_name, to_name); 532 out: 533 if (tvp) { 534 if (error == 0) { 535 struct sysvbfs_node *tbnode = tvp->v_data; 536 tbnode->removed = 1; 537 } 538 vput(tvp); 539 } 540 541 /* tdvp == tvp probably can't happen with this fs, but safety first */ 542 if (tdvp == tvp) 543 vrele(tdvp); 544 else 545 vput(tdvp); 546 547 vrele(fdvp); 548 vrele(fvp); 549 550 return 0; 551 } 552 553 int 554 sysvbfs_readdir(void *v) 555 { 556 struct vop_readdir_args /* { 557 struct vnode *a_vp; 558 struct uio *a_uio; 559 kauth_cred_t a_cred; 560 int *a_eofflag; 561 off_t **a_cookies; 562 int *a_ncookies; 563 } */ *ap = v; 564 struct uio *uio = ap->a_uio; 565 struct vnode *vp = ap->a_vp; 566 struct sysvbfs_node *bnode = vp->v_data; 567 struct bfs *bfs = bnode->bmp->bfs; 568 struct dirent *dp; 569 struct bfs_dirent *file; 570 int i, n, error; 571 572 DPRINTF("%s: offset=%" PRId64 " residue=%zu\n", __func__, 573 uio->uio_offset, uio->uio_resid); 574 575 KDASSERT(vp->v_type == VDIR); 576 KDASSERT(uio->uio_offset >= 0); 577 578 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 579 580 i = uio->uio_offset / sizeof(struct dirent); 581 n = uio->uio_resid / sizeof(struct dirent); 582 if ((i + n) > bfs->n_dirent) 583 n = bfs->n_dirent - i; 584 585 for (file = &bfs->dirent[i]; i < n; file++) { 586 if (file->inode == 0) 587 continue; 588 if (i == bfs->max_dirent) { 589 DPRINTF("%s: file system inconsistent.\n", 590 __func__); 591 break; 592 } 593 i++; 594 memset(dp, 0, sizeof(struct dirent)); 595 dp->d_fileno = file->inode; 596 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 597 dp->d_namlen = strlen(file->name); 598 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 599 dp->d_reclen = sizeof(struct dirent); 600 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 601 DPRINTF("%s: uiomove failed.\n", __func__); 602 free(dp, M_BFS); 603 return error; 604 } 605 } 606 DPRINTF("%s: %d %d %d\n", __func__, i, n, bfs->n_dirent); 607 *ap->a_eofflag = (i == bfs->n_dirent); 608 609 free(dp, M_BFS); 610 return 0; 611 } 612 613 int 614 sysvbfs_inactive(void *arg) 615 { 616 struct vop_inactive_args /* { 617 struct vnode *a_vp; 618 bool *a_recycle; 619 } */ *a = arg; 620 struct vnode *v = a->a_vp; 621 struct sysvbfs_node *bnode = v->v_data; 622 623 DPRINTF("%s:\n", __func__); 624 if (bnode->removed) 625 *a->a_recycle = true; 626 else 627 *a->a_recycle = false; 628 VOP_UNLOCK(v); 629 630 return 0; 631 } 632 633 int 634 sysvbfs_reclaim(void *v) 635 { 636 extern struct pool sysvbfs_node_pool; 637 struct vop_reclaim_args /* { 638 struct vnode *a_vp; 639 } */ *ap = v; 640 struct vnode *vp = ap->a_vp; 641 struct sysvbfs_node *bnode = vp->v_data; 642 643 DPRINTF("%s:\n", __func__); 644 mutex_enter(&mntvnode_lock); 645 LIST_REMOVE(bnode, link); 646 mutex_exit(&mntvnode_lock); 647 cache_purge(vp); 648 genfs_node_destroy(vp); 649 pool_put(&sysvbfs_node_pool, bnode); 650 vp->v_data = NULL; 651 652 return 0; 653 } 654 655 int 656 sysvbfs_bmap(void *arg) 657 { 658 struct vop_bmap_args /* { 659 struct vnode *a_vp; 660 daddr_t a_bn; 661 struct vnode **a_vpp; 662 daddr_t *a_bnp; 663 int *a_runp; 664 } */ *a = arg; 665 struct vnode *v = a->a_vp; 666 struct sysvbfs_node *bnode = v->v_data; 667 struct sysvbfs_mount *bmp = bnode->bmp; 668 struct bfs_inode *inode = bnode->inode; 669 daddr_t blk; 670 671 DPRINTF("%s:\n", __func__); 672 /* BFS algorithm is contiguous allocation */ 673 blk = inode->start_sector + a->a_bn; 674 675 if (blk * BFS_BSIZE > bmp->bfs->data_end) 676 return ENOSPC; 677 678 *a->a_vpp = bmp->devvp; 679 *a->a_runp = 0; 680 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 681 a->a_bn); 682 683 *a->a_bnp = blk; 684 685 686 return 0; 687 } 688 689 int 690 sysvbfs_strategy(void *arg) 691 { 692 struct vop_strategy_args /* { 693 struct vnode *a_vp; 694 struct buf *a_bp; 695 } */ *a = arg; 696 struct buf *b = a->a_bp; 697 struct vnode *v = a->a_vp; 698 struct sysvbfs_node *bnode = v->v_data; 699 struct sysvbfs_mount *bmp = bnode->bmp; 700 int error; 701 702 DPRINTF("%s:\n", __func__); 703 KDASSERT(v->v_type == VREG); 704 if (b->b_blkno == b->b_lblkno) { 705 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 706 if (error) { 707 b->b_error = error; 708 biodone(b); 709 return error; 710 } 711 if ((long)b->b_blkno == -1) 712 clrbuf(b); 713 } 714 if ((long)b->b_blkno == -1) { 715 biodone(b); 716 return 0; 717 } 718 719 return VOP_STRATEGY(bmp->devvp, b); 720 } 721 722 int 723 sysvbfs_print(void *v) 724 { 725 struct vop_print_args /* { 726 struct vnode *a_vp; 727 } */ *ap = v; 728 struct sysvbfs_node *bnode = ap->a_vp->v_data; 729 730 DPRINTF("%s:\n", __func__); 731 bfs_dump(bnode->bmp->bfs); 732 733 return 0; 734 } 735 736 int 737 sysvbfs_advlock(void *v) 738 { 739 struct vop_advlock_args /* { 740 struct vnode *a_vp; 741 void *a_id; 742 int a_op; 743 struct flock *a_fl; 744 int a_flags; 745 } */ *ap = v; 746 struct sysvbfs_node *bnode = ap->a_vp->v_data; 747 748 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 749 750 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 751 } 752 753 int 754 sysvbfs_pathconf(void *v) 755 { 756 struct vop_pathconf_args /* { 757 struct vnode *a_vp; 758 int a_name; 759 register_t *a_retval; 760 } */ *ap = v; 761 int err = 0; 762 763 DPRINTF("%s:\n", __func__); 764 765 switch (ap->a_name) { 766 case _PC_LINK_MAX: 767 *ap->a_retval = 1; 768 break; 769 case _PC_NAME_MAX: 770 *ap->a_retval = BFS_FILENAME_MAXLEN; 771 break; 772 case _PC_PATH_MAX: 773 *ap->a_retval = BFS_FILENAME_MAXLEN; 774 break; 775 case _PC_CHOWN_RESTRICTED: 776 *ap->a_retval = 1; 777 break; 778 case _PC_NO_TRUNC: 779 *ap->a_retval = 0; 780 break; 781 case _PC_SYNC_IO: 782 *ap->a_retval = 1; 783 break; 784 case _PC_FILESIZEBITS: 785 *ap->a_retval = 32; 786 break; 787 default: 788 err = EINVAL; 789 break; 790 } 791 792 return err; 793 } 794 795 int 796 sysvbfs_fsync(void *v) 797 { 798 struct vop_fsync_args /* { 799 struct vnode *a_vp; 800 kauth_cred_t a_cred; 801 int a_flags; 802 off_t offlo; 803 off_t offhi; 804 } */ *ap = v; 805 struct vnode *vp = ap->a_vp; 806 int error, wait; 807 808 if (ap->a_flags & FSYNC_CACHE) { 809 return EOPNOTSUPP; 810 } 811 812 wait = (ap->a_flags & FSYNC_WAIT) != 0; 813 vflushbuf(vp, wait); 814 815 if ((ap->a_flags & FSYNC_DATAONLY) != 0) 816 error = 0; 817 else 818 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 819 820 return error; 821 } 822 823 int 824 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 825 const struct timespec *mod, int flags) 826 { 827 struct sysvbfs_node *bnode = vp->v_data; 828 struct bfs_fileattr attr; 829 830 DPRINTF("%s:\n", __func__); 831 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 832 if (bnode->update_atime) { 833 attr.atime = acc ? acc->tv_sec : time_second; 834 bnode->update_atime = false; 835 } 836 if (bnode->update_ctime) { 837 attr.ctime = time_second; 838 bnode->update_ctime = false; 839 } 840 if (bnode->update_mtime) { 841 attr.mtime = mod ? mod->tv_sec : time_second; 842 bnode->update_mtime = false; 843 } 844 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 845 846 return 0; 847 } 848
Indexes created Mon Sep 29 21:09:56 GMT 2025