sysvbfs_vnops.c revision 1.29
1 /* $NetBSD: sysvbfs_vnops.c,v 1.29 2010/05/27 13:22:02 pooka 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 1.29 2010/05/27 13:22:02 pooka 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 bool islastcn = cnp->cn_flags & ISLASTCN; 82 83 DPRINTF("%s: %s op=%d %d\n", __func__, name, nameiop, 84 cnp->cn_flags); 85 86 *a->a_vpp = NULL; 87 88 KASSERT((cnp->cn_flags & ISDOTDOT) == 0); 89 if ((error = VOP_ACCESS(a->a_dvp, VEXEC, cnp->cn_cred)) != 0) { 90 return error; /* directory permittion. */ 91 } 92 93 if (namelen == 1 && name[0] == '.') { /* "." */ 94 vref(v); 95 *a->a_vpp = v; 96 } else { /* Regular file */ 97 if (!bfs_dirent_lookup_by_name(bfs, cnp->cn_nameptr, 98 &dirent)) { 99 if (nameiop != CREATE && nameiop != RENAME) { 100 DPRINTF("%s: no such a file. (1)\n", 101 __func__); 102 return ENOENT; 103 } 104 if ((error = VOP_ACCESS(v, VWRITE, cnp->cn_cred)) != 0) 105 return error; 106 cnp->cn_flags |= SAVENAME; 107 return EJUSTRETURN; 108 } 109 110 /* Allocate v-node */ 111 if ((error = sysvbfs_vget(v->v_mount, dirent->inode, &vpp)) != 0) { 112 DPRINTF("%s: can't get vnode.\n", __func__); 113 return error; 114 } 115 *a->a_vpp = vpp; 116 } 117 118 if (cnp->cn_nameiop != LOOKUP && islastcn) 119 cnp->cn_flags |= SAVENAME; 120 121 return 0; 122 } 123 124 int 125 sysvbfs_create(void *arg) 126 { 127 struct vop_create_args /* { 128 struct vnode *a_dvp; 129 struct vnode **a_vpp; 130 struct componentname *a_cnp; 131 struct vattr *a_vap; 132 } */ *a = arg; 133 struct sysvbfs_node *bnode = a->a_dvp->v_data; 134 struct sysvbfs_mount *bmp = bnode->bmp; 135 struct bfs *bfs = bmp->bfs; 136 struct mount *mp = bmp->mountp; 137 struct bfs_dirent *dirent; 138 struct bfs_fileattr attr; 139 struct vattr *va = a->a_vap; 140 kauth_cred_t cr = a->a_cnp->cn_cred; 141 int err = 0; 142 143 DPRINTF("%s: %s\n", __func__, a->a_cnp->cn_nameptr); 144 KDASSERT(a->a_vap->va_type == VREG); 145 attr.uid = kauth_cred_geteuid(cr); 146 attr.gid = kauth_cred_getegid(cr); 147 attr.mode = va->va_mode; 148 149 if ((err = bfs_file_create(bfs, a->a_cnp->cn_nameptr, 0, 0, &attr)) 150 != 0) { 151 DPRINTF("%s: bfs_file_create failed.\n", __func__); 152 goto unlock_exit; 153 } 154 155 if (!bfs_dirent_lookup_by_name(bfs, a->a_cnp->cn_nameptr, &dirent)) 156 panic("no dirent for created file."); 157 158 if ((err = sysvbfs_vget(mp, dirent->inode, a->a_vpp)) != 0) { 159 DPRINTF("%s: sysvbfs_vget failed.\n", __func__); 160 goto unlock_exit; 161 } 162 bnode = (*a->a_vpp)->v_data; 163 bnode->update_ctime = true; 164 bnode->update_mtime = true; 165 bnode->update_atime = true; 166 167 unlock_exit: 168 /* unlock parent directory */ 169 vput(a->a_dvp); /* locked at sysvbfs_lookup(); */ 170 171 if (err || (a->a_cnp->cn_flags & SAVESTART) == 0) 172 PNBUF_PUT(a->a_cnp->cn_pnbuf); 173 174 return err; 175 } 176 177 int 178 sysvbfs_open(void *arg) 179 { 180 struct vop_open_args /* { 181 struct vnode *a_vp; 182 int a_mode; 183 kauth_cred_t a_cred; 184 } */ *a = arg; 185 struct vnode *v = a->a_vp; 186 struct sysvbfs_node *bnode = v->v_data; 187 struct bfs_inode *inode = bnode->inode; 188 struct bfs *bfs = bnode->bmp->bfs; 189 struct bfs_dirent *dirent; 190 191 DPRINTF("%s:\n", __func__); 192 KDASSERT(v->v_type == VREG || v->v_type == VDIR); 193 194 if (!bfs_dirent_lookup_by_inode(bfs, inode->number, &dirent)) 195 return ENOENT; 196 bnode->update_atime = true; 197 if ((a->a_mode & FWRITE) && !(a->a_mode & O_APPEND)) { 198 bnode->size = 0; 199 } else { 200 bnode->size = bfs_file_size(inode); 201 } 202 bnode->data_block = inode->start_sector; 203 204 return 0; 205 } 206 207 int 208 sysvbfs_close(void *arg) 209 { 210 struct vop_close_args /* { 211 struct vnodeop_desc *a_desc; 212 struct vnode *a_vp; 213 int a_fflag; 214 kauth_cred_t a_cred; 215 } */ *a = arg; 216 struct vnode *v = a->a_vp; 217 struct sysvbfs_node *bnode = v->v_data; 218 struct bfs_fileattr attr; 219 220 DPRINTF("%s:\n", __func__); 221 uvm_vnp_setsize(v, bnode->size); 222 223 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 224 if (bnode->update_atime) 225 attr.atime = time_second; 226 if (bnode->update_ctime) 227 attr.ctime = time_second; 228 if (bnode->update_mtime) 229 attr.mtime = time_second; 230 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 231 232 VOP_FSYNC(a->a_vp, a->a_cred, FSYNC_WAIT, 0, 0); 233 234 return 0; 235 } 236 237 static int 238 sysvbfs_check_possible(struct vnode *vp, struct sysvbfs_node *bnode, 239 mode_t mode) 240 { 241 242 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 243 return EROFS; 244 245 return 0; 246 } 247 248 static int 249 sysvbfs_check_permitted(struct vnode *vp, struct sysvbfs_node *bnode, 250 mode_t mode, kauth_cred_t cred) 251 { 252 struct bfs_fileattr *attr = &bnode->inode->attr; 253 254 return genfs_can_access(vp->v_type, attr->mode, attr->uid, attr->gid, 255 mode, cred); 256 } 257 258 int 259 sysvbfs_access(void *arg) 260 { 261 struct vop_access_args /* { 262 struct vnode *a_vp; 263 int a_mode; 264 kauth_cred_t a_cred; 265 } */ *ap = arg; 266 struct vnode *vp = ap->a_vp; 267 struct sysvbfs_node *bnode = vp->v_data; 268 int error; 269 270 DPRINTF("%s:\n", __func__); 271 272 error = sysvbfs_check_possible(vp, bnode, ap->a_mode); 273 if (error) 274 return error; 275 276 error = sysvbfs_check_permitted(vp, bnode, ap->a_mode, ap->a_cred); 277 278 return error; 279 } 280 281 int 282 sysvbfs_getattr(void *v) 283 { 284 struct vop_getattr_args /* { 285 struct vnode *a_vp; 286 struct vattr *a_vap; 287 kauth_cred_t a_cred; 288 } */ *ap = v; 289 struct vnode *vp = ap->a_vp; 290 struct sysvbfs_node *bnode = vp->v_data; 291 struct bfs_inode *inode = bnode->inode; 292 struct bfs_fileattr *attr = &inode->attr; 293 struct sysvbfs_mount *bmp = bnode->bmp; 294 struct vattr *vap = ap->a_vap; 295 296 DPRINTF("%s:\n", __func__); 297 298 vap->va_type = vp->v_type; 299 vap->va_mode = attr->mode; 300 vap->va_nlink = attr->nlink; 301 vap->va_uid = attr->uid; 302 vap->va_gid = attr->gid; 303 vap->va_fsid = bmp->devvp->v_rdev; 304 vap->va_fileid = inode->number; 305 vap->va_size = bfs_file_size(inode); 306 vap->va_blocksize = BFS_BSIZE; 307 vap->va_atime.tv_sec = attr->atime; 308 vap->va_mtime.tv_sec = attr->mtime; 309 vap->va_ctime.tv_sec = attr->ctime; 310 vap->va_birthtime.tv_sec = 0; 311 vap->va_gen = 1; 312 vap->va_flags = 0; 313 vap->va_rdev = 0; /* No device file */ 314 vap->va_bytes = vap->va_size; 315 vap->va_filerev = 0; 316 vap->va_vaflags = 0; 317 318 return 0; 319 } 320 321 int 322 sysvbfs_setattr(void *arg) 323 { 324 struct vop_setattr_args /* { 325 struct vnode *a_vp; 326 struct vattr *a_vap; 327 kauth_cred_t a_cred; 328 struct proc *p; 329 } */ *ap = arg; 330 struct vnode *vp = ap->a_vp; 331 struct vattr *vap = ap->a_vap; 332 struct sysvbfs_node *bnode = vp->v_data; 333 struct bfs_inode *inode = bnode->inode; 334 struct bfs_fileattr *attr = &inode->attr; 335 struct bfs *bfs = bnode->bmp->bfs; 336 337 DPRINTF("%s:\n", __func__); 338 if (vp->v_mount->mnt_flag & MNT_RDONLY) 339 return EROFS; 340 341 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 342 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 343 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 344 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) 345 return EINVAL; 346 347 if (vap->va_uid != (uid_t)VNOVAL) 348 attr->uid = vap->va_uid; 349 if (vap->va_gid != (uid_t)VNOVAL) 350 attr->gid = vap->va_gid; 351 if (vap->va_mode != (mode_t)VNOVAL) 352 attr->mode = vap->va_mode; 353 if (vap->va_atime.tv_sec != VNOVAL) 354 attr->atime = vap->va_atime.tv_sec; 355 if (vap->va_mtime.tv_sec != VNOVAL) 356 attr->mtime = vap->va_mtime.tv_sec; 357 if (vap->va_ctime.tv_sec != VNOVAL) 358 attr->ctime = vap->va_ctime.tv_sec; 359 360 bfs_inode_set_attr(bfs, inode, attr); 361 362 return 0; 363 } 364 365 int 366 sysvbfs_read(void *arg) 367 { 368 struct vop_read_args /* { 369 struct vnode *a_vp; 370 struct uio *a_uio; 371 int a_ioflag; 372 kauth_cred_t a_cred; 373 } */ *a = arg; 374 struct vnode *v = a->a_vp; 375 struct uio *uio = a->a_uio; 376 struct sysvbfs_node *bnode = v->v_data; 377 struct bfs_inode *inode = bnode->inode; 378 vsize_t sz, filesz = bfs_file_size(inode); 379 int err; 380 const int advice = IO_ADV_DECODE(a->a_ioflag); 381 382 DPRINTF("%s: type=%d\n", __func__, v->v_type); 383 if (v->v_type != VREG) 384 return EINVAL; 385 386 while (uio->uio_resid > 0) { 387 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 388 break; 389 390 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 391 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(v)); 392 if (err) 393 break; 394 DPRINTF("%s: read %ldbyte\n", __func__, sz); 395 } 396 397 return sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 398 } 399 400 int 401 sysvbfs_write(void *arg) 402 { 403 struct vop_write_args /* { 404 struct vnode *a_vp; 405 struct uio *a_uio; 406 int a_ioflag; 407 kauth_cred_t a_cred; 408 } */ *a = arg; 409 struct vnode *v = a->a_vp; 410 struct uio *uio = a->a_uio; 411 int advice = IO_ADV_DECODE(a->a_ioflag); 412 struct sysvbfs_node *bnode = v->v_data; 413 struct bfs_inode *inode = bnode->inode; 414 bool extended = false; 415 vsize_t sz; 416 int err = 0; 417 418 if (a->a_vp->v_type != VREG) 419 return EISDIR; 420 421 if (a->a_ioflag & IO_APPEND) 422 uio->uio_offset = bnode->size; 423 424 if (uio->uio_resid == 0) 425 return 0; 426 427 if (bnode->size < uio->uio_offset + uio->uio_resid) { 428 bnode->size = uio->uio_offset + uio->uio_resid; 429 uvm_vnp_setsize(v, bnode->size); 430 extended = true; 431 } 432 433 while (uio->uio_resid > 0) { 434 sz = uio->uio_resid; 435 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 436 UBC_WRITE | UBC_UNMAP_FLAG(v)); 437 if (err) 438 break; 439 DPRINTF("%s: write %ldbyte\n", __func__, sz); 440 } 441 inode->end_sector = bnode->data_block + 442 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 443 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 444 bnode->size - 1; 445 bnode->update_mtime = true; 446 447 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 448 449 return err; 450 } 451 452 int 453 sysvbfs_remove(void *arg) 454 { 455 struct vop_remove_args /* { 456 struct vnodeop_desc *a_desc; 457 struct vnode * a_dvp; 458 struct vnode * a_vp; 459 struct componentname * a_cnp; 460 } */ *ap = arg; 461 struct vnode *vp = ap->a_vp; 462 struct vnode *dvp = ap->a_dvp; 463 struct sysvbfs_node *bnode = vp->v_data; 464 struct sysvbfs_mount *bmp = bnode->bmp; 465 struct bfs *bfs = bmp->bfs; 466 int err; 467 468 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 469 470 if (vp->v_type == VDIR) 471 return EPERM; 472 473 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr)) != 0) 474 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 475 476 VN_KNOTE(ap->a_vp, NOTE_DELETE); 477 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 478 if (dvp == vp) 479 vrele(vp); 480 else 481 vput(vp); 482 vput(dvp); 483 484 if (err || (ap->a_cnp->cn_flags & SAVESTART) == 0) 485 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 486 487 return err; 488 } 489 490 int 491 sysvbfs_rename(void *arg) 492 { 493 struct vop_rename_args /* { 494 struct vnode *a_fdvp; from parent-directory v-node 495 struct vnode *a_fvp; from file v-node 496 struct componentname *a_fcnp; 497 struct vnode *a_tdvp; to parent-directory 498 struct vnode *a_tvp; to file v-node 499 struct componentname *a_tcnp; 500 } */ *ap = arg; 501 struct vnode *fvp = ap->a_fvp; 502 struct vnode *fdvp = ap->a_fdvp; 503 struct vnode *tvp = ap->a_tvp; 504 struct vnode *tdvp = ap->a_tdvp; 505 struct sysvbfs_node *bnode = fvp->v_data; 506 struct bfs *bfs = bnode->bmp->bfs; 507 const char *from_name = ap->a_fcnp->cn_nameptr; 508 const char *to_name = ap->a_tcnp->cn_nameptr; 509 int error; 510 511 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 512 if ((fvp->v_mount != tdvp->v_mount) || 513 (tvp && (fvp->v_mount != tvp->v_mount))) { 514 error = EXDEV; 515 printf("cross-device link\n"); 516 goto out; 517 } 518 519 KDASSERT(fvp->v_type == VREG); 520 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 521 522 error = bfs_file_rename(bfs, from_name, to_name); 523 out: 524 if (tvp) 525 vput(tvp); 526 527 /* tdvp == tvp probably can't happen with this fs, but safety first */ 528 if (tdvp == tvp) 529 vrele(tdvp); 530 else 531 vput(tdvp); 532 533 vrele(fdvp); 534 vrele(fvp); 535 536 return 0; 537 } 538 539 int 540 sysvbfs_readdir(void *v) 541 { 542 struct vop_readdir_args /* { 543 struct vnode *a_vp; 544 struct uio *a_uio; 545 kauth_cred_t a_cred; 546 int *a_eofflag; 547 off_t **a_cookies; 548 int *a_ncookies; 549 } */ *ap = v; 550 struct uio *uio = ap->a_uio; 551 struct vnode *vp = ap->a_vp; 552 struct sysvbfs_node *bnode = vp->v_data; 553 struct bfs *bfs = bnode->bmp->bfs; 554 struct dirent *dp; 555 struct bfs_dirent *file; 556 int i, n, error; 557 558 DPRINTF("%s: offset=%lld residue=%d\n", __func__, 559 uio->uio_offset, uio->uio_resid); 560 561 KDASSERT(vp->v_type == VDIR); 562 KDASSERT(uio->uio_offset >= 0); 563 564 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 565 566 i = uio->uio_offset / sizeof(struct dirent); 567 n = uio->uio_resid / sizeof(struct dirent); 568 if ((i + n) > bfs->n_dirent) 569 n = bfs->n_dirent - i; 570 571 for (file = &bfs->dirent[i]; i < n; file++) { 572 if (file->inode == 0) 573 continue; 574 if (i == bfs->max_dirent) { 575 DPRINTF("%s: file system inconsistent.\n", 576 __func__); 577 break; 578 } 579 i++; 580 memset(dp, 0, sizeof(struct dirent)); 581 dp->d_fileno = file->inode; 582 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 583 dp->d_namlen = strlen(file->name); 584 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 585 dp->d_reclen = sizeof(struct dirent); 586 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 587 DPRINTF("%s: uiomove failed.\n", __func__); 588 free(dp, M_BFS); 589 return error; 590 } 591 } 592 DPRINTF("%s: %d %d %d\n", __func__, i, n, bfs->n_dirent); 593 *ap->a_eofflag = (i == bfs->n_dirent); 594 595 free(dp, M_BFS); 596 return 0; 597 } 598 599 int 600 sysvbfs_inactive(void *arg) 601 { 602 struct vop_inactive_args /* { 603 struct vnode *a_vp; 604 bool *a_recycle; 605 } */ *a = arg; 606 struct vnode *v = a->a_vp; 607 608 DPRINTF("%s:\n", __func__); 609 *a->a_recycle = true; 610 VOP_UNLOCK(v, 0); 611 612 return 0; 613 } 614 615 int 616 sysvbfs_reclaim(void *v) 617 { 618 extern struct pool sysvbfs_node_pool; 619 struct vop_reclaim_args /* { 620 struct vnode *a_vp; 621 } */ *ap = v; 622 struct vnode *vp = ap->a_vp; 623 struct sysvbfs_node *bnode = vp->v_data; 624 625 DPRINTF("%s:\n", __func__); 626 mutex_enter(&mntvnode_lock); 627 LIST_REMOVE(bnode, link); 628 mutex_exit(&mntvnode_lock); 629 cache_purge(vp); 630 genfs_node_destroy(vp); 631 pool_put(&sysvbfs_node_pool, bnode); 632 vp->v_data = NULL; 633 634 return 0; 635 } 636 637 int 638 sysvbfs_bmap(void *arg) 639 { 640 struct vop_bmap_args /* { 641 struct vnode *a_vp; 642 daddr_t a_bn; 643 struct vnode **a_vpp; 644 daddr_t *a_bnp; 645 int *a_runp; 646 } */ *a = arg; 647 struct vnode *v = a->a_vp; 648 struct sysvbfs_node *bnode = v->v_data; 649 struct sysvbfs_mount *bmp = bnode->bmp; 650 struct bfs_inode *inode = bnode->inode; 651 daddr_t blk; 652 653 DPRINTF("%s:\n", __func__); 654 /* BFS algorithm is contiguous allocation */ 655 blk = inode->start_sector + a->a_bn; 656 657 if (blk * BFS_BSIZE > bmp->bfs->data_end) 658 return ENOSPC; 659 660 *a->a_vpp = bmp->devvp; 661 *a->a_runp = 0; 662 DPRINTF("%s: %d + %lld\n", __func__, inode->start_sector, a->a_bn); 663 664 *a->a_bnp = blk; 665 666 667 return 0; 668 } 669 670 int 671 sysvbfs_strategy(void *arg) 672 { 673 struct vop_strategy_args /* { 674 struct vnode *a_vp; 675 struct buf *a_bp; 676 } */ *a = arg; 677 struct buf *b = a->a_bp; 678 struct vnode *v = a->a_vp; 679 struct sysvbfs_node *bnode = v->v_data; 680 struct sysvbfs_mount *bmp = bnode->bmp; 681 int error; 682 683 DPRINTF("%s:\n", __func__); 684 KDASSERT(v->v_type == VREG); 685 if (b->b_blkno == b->b_lblkno) { 686 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 687 if (error) { 688 b->b_error = error; 689 biodone(b); 690 return error; 691 } 692 if ((long)b->b_blkno == -1) 693 clrbuf(b); 694 } 695 if ((long)b->b_blkno == -1) { 696 biodone(b); 697 return 0; 698 } 699 700 return VOP_STRATEGY(bmp->devvp, b); 701 } 702 703 int 704 sysvbfs_print(void *v) 705 { 706 struct vop_print_args /* { 707 struct vnode *a_vp; 708 } */ *ap = v; 709 struct sysvbfs_node *bnode = ap->a_vp->v_data; 710 711 DPRINTF("%s:\n", __func__); 712 bfs_dump(bnode->bmp->bfs); 713 714 return 0; 715 } 716 717 int 718 sysvbfs_advlock(void *v) 719 { 720 struct vop_advlock_args /* { 721 struct vnode *a_vp; 722 void *a_id; 723 int a_op; 724 struct flock *a_fl; 725 int a_flags; 726 } */ *ap = v; 727 struct sysvbfs_node *bnode = ap->a_vp->v_data; 728 729 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 730 731 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 732 } 733 734 int 735 sysvbfs_pathconf(void *v) 736 { 737 struct vop_pathconf_args /* { 738 struct vnode *a_vp; 739 int a_name; 740 register_t *a_retval; 741 } */ *ap = v; 742 int err = 0; 743 744 DPRINTF("%s:\n", __func__); 745 746 switch (ap->a_name) { 747 case _PC_LINK_MAX: 748 *ap->a_retval = 1; 749 break; 750 case _PC_NAME_MAX: 751 *ap->a_retval = BFS_FILENAME_MAXLEN; 752 break; 753 case _PC_PATH_MAX: 754 *ap->a_retval = BFS_FILENAME_MAXLEN; 755 break; 756 case _PC_CHOWN_RESTRICTED: 757 *ap->a_retval = 1; 758 break; 759 case _PC_NO_TRUNC: 760 *ap->a_retval = 0; 761 break; 762 case _PC_SYNC_IO: 763 *ap->a_retval = 1; 764 break; 765 case _PC_FILESIZEBITS: 766 *ap->a_retval = 32; 767 break; 768 default: 769 err = EINVAL; 770 break; 771 } 772 773 return err; 774 } 775 776 int 777 sysvbfs_fsync(void *v) 778 { 779 struct vop_fsync_args /* { 780 struct vnode *a_vp; 781 kauth_cred_t a_cred; 782 int a_flags; 783 off_t offlo; 784 off_t offhi; 785 } */ *ap = v; 786 struct vnode *vp = ap->a_vp; 787 int error, wait; 788 789 if (ap->a_flags & FSYNC_CACHE) { 790 return EOPNOTSUPP; 791 } 792 793 wait = (ap->a_flags & FSYNC_WAIT) != 0; 794 vflushbuf(vp, wait); 795 796 if ((ap->a_flags & FSYNC_DATAONLY) != 0) 797 error = 0; 798 else 799 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 800 801 return error; 802 } 803 804 int 805 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 806 const struct timespec *mod, int flags) 807 { 808 struct sysvbfs_node *bnode = vp->v_data; 809 struct bfs_fileattr attr; 810 811 DPRINTF("%s:\n", __func__); 812 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 813 if (bnode->update_atime) { 814 attr.atime = acc ? acc->tv_sec : time_second; 815 bnode->update_atime = false; 816 } 817 if (bnode->update_ctime) { 818 attr.ctime = time_second; 819 bnode->update_ctime = false; 820 } 821 if (bnode->update_mtime) { 822 attr.mtime = mod ? mod->tv_sec : time_second; 823 bnode->update_mtime = false; 824 } 825 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 826 827 return 0; 828 } 829
Indexes created Mon Sep 29 21:09:56 GMT 2025