1 /* $NetBSD: sysvbfs_vnops.c,v 1.39 2011/12/12 19:11:21 njoly 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 1.39 2011/12/12 19:11:21 njoly 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 switch (v->v_type) { 382 case VREG: 383 break; 384 case VDIR: 385 return EISDIR; 386 default: 387 return EINVAL; 388 } 389 390 while (uio->uio_resid > 0) { 391 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 392 break; 393 394 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 395 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(v)); 396 if (err) 397 break; 398 DPRINTF("%s: read %ldbyte\n", __func__, sz); 399 } 400 401 return sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 402 } 403 404 int 405 sysvbfs_write(void *arg) 406 { 407 struct vop_write_args /* { 408 struct vnode *a_vp; 409 struct uio *a_uio; 410 int a_ioflag; 411 kauth_cred_t a_cred; 412 } */ *a = arg; 413 struct vnode *v = a->a_vp; 414 struct uio *uio = a->a_uio; 415 int advice = IO_ADV_DECODE(a->a_ioflag); 416 struct sysvbfs_node *bnode = v->v_data; 417 struct bfs_inode *inode = bnode->inode; 418 bool extended = false; 419 vsize_t sz; 420 int err = 0; 421 422 if (a->a_vp->v_type != VREG) 423 return EISDIR; 424 425 if (a->a_ioflag & IO_APPEND) 426 uio->uio_offset = bnode->size; 427 428 if (uio->uio_resid == 0) 429 return 0; 430 431 if (bnode->size < uio->uio_offset + uio->uio_resid) { 432 bnode->size = uio->uio_offset + uio->uio_resid; 433 uvm_vnp_setsize(v, bnode->size); 434 extended = true; 435 } 436 437 while (uio->uio_resid > 0) { 438 sz = uio->uio_resid; 439 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 440 UBC_WRITE | UBC_UNMAP_FLAG(v)); 441 if (err) 442 break; 443 DPRINTF("%s: write %ldbyte\n", __func__, sz); 444 } 445 inode->end_sector = bnode->data_block + 446 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 447 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 448 bnode->size - 1; 449 bnode->update_mtime = true; 450 451 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 452 453 return err; 454 } 455 456 int 457 sysvbfs_remove(void *arg) 458 { 459 struct vop_remove_args /* { 460 struct vnodeop_desc *a_desc; 461 struct vnode * a_dvp; 462 struct vnode * a_vp; 463 struct componentname * a_cnp; 464 } */ *ap = arg; 465 struct vnode *vp = ap->a_vp; 466 struct vnode *dvp = ap->a_dvp; 467 struct sysvbfs_node *bnode = vp->v_data; 468 struct sysvbfs_mount *bmp = bnode->bmp; 469 struct bfs *bfs = bmp->bfs; 470 int err; 471 472 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 473 474 if (vp->v_type == VDIR) 475 return EPERM; 476 477 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr)) != 0) 478 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 479 480 VN_KNOTE(ap->a_vp, NOTE_DELETE); 481 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 482 if (dvp == vp) 483 vrele(vp); 484 else 485 vput(vp); 486 vput(dvp); 487 488 if (err == 0) { 489 bnode->removed = 1; 490 } 491 492 return err; 493 } 494 495 int 496 sysvbfs_rename(void *arg) 497 { 498 struct vop_rename_args /* { 499 struct vnode *a_fdvp; from parent-directory v-node 500 struct vnode *a_fvp; from file v-node 501 struct componentname *a_fcnp; 502 struct vnode *a_tdvp; to parent-directory 503 struct vnode *a_tvp; to file v-node 504 struct componentname *a_tcnp; 505 } */ *ap = arg; 506 struct vnode *fvp = ap->a_fvp; 507 struct vnode *fdvp = ap->a_fdvp; 508 struct vnode *tvp = ap->a_tvp; 509 struct vnode *tdvp = ap->a_tdvp; 510 struct sysvbfs_node *bnode = fvp->v_data; 511 struct bfs *bfs = bnode->bmp->bfs; 512 const char *from_name = ap->a_fcnp->cn_nameptr; 513 const char *to_name = ap->a_tcnp->cn_nameptr; 514 int error; 515 516 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 517 if ((fvp->v_mount != tdvp->v_mount) || 518 (tvp && (fvp->v_mount != tvp->v_mount))) { 519 error = EXDEV; 520 printf("cross-device link\n"); 521 goto out; 522 } 523 524 KDASSERT(fvp->v_type == VREG); 525 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 526 KASSERT(tdvp == fdvp); 527 528 /* 529 * Make sure the source hasn't been removed between lookup 530 * and target directory lock. 531 */ 532 if (bnode->removed) { 533 error = ENOENT; 534 goto out; 535 } 536 537 error = bfs_file_rename(bfs, from_name, to_name); 538 out: 539 if (tvp) { 540 if (error == 0) { 541 struct sysvbfs_node *tbnode = tvp->v_data; 542 tbnode->removed = 1; 543 } 544 vput(tvp); 545 } 546 547 /* tdvp == tvp probably can't happen with this fs, but safety first */ 548 if (tdvp == tvp) 549 vrele(tdvp); 550 else 551 vput(tdvp); 552 553 vrele(fdvp); 554 vrele(fvp); 555 556 return 0; 557 } 558 559 int 560 sysvbfs_readdir(void *v) 561 { 562 struct vop_readdir_args /* { 563 struct vnode *a_vp; 564 struct uio *a_uio; 565 kauth_cred_t a_cred; 566 int *a_eofflag; 567 off_t **a_cookies; 568 int *a_ncookies; 569 } */ *ap = v; 570 struct uio *uio = ap->a_uio; 571 struct vnode *vp = ap->a_vp; 572 struct sysvbfs_node *bnode = vp->v_data; 573 struct bfs *bfs = bnode->bmp->bfs; 574 struct dirent *dp; 575 struct bfs_dirent *file; 576 int i, n, error; 577 578 DPRINTF("%s: offset=%" PRId64 " residue=%zu\n", __func__, 579 uio->uio_offset, uio->uio_resid); 580 581 KDASSERT(vp->v_type == VDIR); 582 KDASSERT(uio->uio_offset >= 0); 583 584 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 585 586 i = uio->uio_offset / sizeof(struct dirent); 587 n = uio->uio_resid / sizeof(struct dirent); 588 if ((i + n) > bfs->n_dirent) 589 n = bfs->n_dirent - i; 590 591 for (file = &bfs->dirent[i]; i < n; file++) { 592 if (file->inode == 0) 593 continue; 594 if (i == bfs->max_dirent) { 595 DPRINTF("%s: file system inconsistent.\n", 596 __func__); 597 break; 598 } 599 i++; 600 memset(dp, 0, sizeof(struct dirent)); 601 dp->d_fileno = file->inode; 602 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 603 dp->d_namlen = strlen(file->name); 604 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 605 dp->d_reclen = sizeof(struct dirent); 606 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 607 DPRINTF("%s: uiomove failed.\n", __func__); 608 free(dp, M_BFS); 609 return error; 610 } 611 } 612 DPRINTF("%s: %d %d %d\n", __func__, i, n, bfs->n_dirent); 613 *ap->a_eofflag = (i == bfs->n_dirent); 614 615 free(dp, M_BFS); 616 return 0; 617 } 618 619 int 620 sysvbfs_inactive(void *arg) 621 { 622 struct vop_inactive_args /* { 623 struct vnode *a_vp; 624 bool *a_recycle; 625 } */ *a = arg; 626 struct vnode *v = a->a_vp; 627 struct sysvbfs_node *bnode = v->v_data; 628 629 DPRINTF("%s:\n", __func__); 630 if (bnode->removed) 631 *a->a_recycle = true; 632 else 633 *a->a_recycle = false; 634 VOP_UNLOCK(v); 635 636 return 0; 637 } 638 639 int 640 sysvbfs_reclaim(void *v) 641 { 642 extern struct pool sysvbfs_node_pool; 643 struct vop_reclaim_args /* { 644 struct vnode *a_vp; 645 } */ *ap = v; 646 struct vnode *vp = ap->a_vp; 647 struct sysvbfs_node *bnode = vp->v_data; 648 649 DPRINTF("%s:\n", __func__); 650 mutex_enter(&mntvnode_lock); 651 LIST_REMOVE(bnode, link); 652 mutex_exit(&mntvnode_lock); 653 genfs_node_destroy(vp); 654 pool_put(&sysvbfs_node_pool, bnode); 655 vp->v_data = NULL; 656 657 return 0; 658 } 659 660 int 661 sysvbfs_bmap(void *arg) 662 { 663 struct vop_bmap_args /* { 664 struct vnode *a_vp; 665 daddr_t a_bn; 666 struct vnode **a_vpp; 667 daddr_t *a_bnp; 668 int *a_runp; 669 } */ *a = arg; 670 struct vnode *v = a->a_vp; 671 struct sysvbfs_node *bnode = v->v_data; 672 struct sysvbfs_mount *bmp = bnode->bmp; 673 struct bfs_inode *inode = bnode->inode; 674 daddr_t blk; 675 676 DPRINTF("%s:\n", __func__); 677 /* BFS algorithm is contiguous allocation */ 678 blk = inode->start_sector + a->a_bn; 679 680 if (blk * BFS_BSIZE > bmp->bfs->data_end) 681 return ENOSPC; 682 683 *a->a_vpp = bmp->devvp; 684 *a->a_runp = 0; 685 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 686 a->a_bn); 687 688 *a->a_bnp = blk; 689 690 691 return 0; 692 } 693 694 int 695 sysvbfs_strategy(void *arg) 696 { 697 struct vop_strategy_args /* { 698 struct vnode *a_vp; 699 struct buf *a_bp; 700 } */ *a = arg; 701 struct buf *b = a->a_bp; 702 struct vnode *v = a->a_vp; 703 struct sysvbfs_node *bnode = v->v_data; 704 struct sysvbfs_mount *bmp = bnode->bmp; 705 int error; 706 707 DPRINTF("%s:\n", __func__); 708 KDASSERT(v->v_type == VREG); 709 if (b->b_blkno == b->b_lblkno) { 710 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 711 if (error) { 712 b->b_error = error; 713 biodone(b); 714 return error; 715 } 716 if ((long)b->b_blkno == -1) 717 clrbuf(b); 718 } 719 if ((long)b->b_blkno == -1) { 720 biodone(b); 721 return 0; 722 } 723 724 return VOP_STRATEGY(bmp->devvp, b); 725 } 726 727 int 728 sysvbfs_print(void *v) 729 { 730 struct vop_print_args /* { 731 struct vnode *a_vp; 732 } */ *ap = v; 733 struct sysvbfs_node *bnode = ap->a_vp->v_data; 734 735 DPRINTF("%s:\n", __func__); 736 bfs_dump(bnode->bmp->bfs); 737 738 return 0; 739 } 740 741 int 742 sysvbfs_advlock(void *v) 743 { 744 struct vop_advlock_args /* { 745 struct vnode *a_vp; 746 void *a_id; 747 int a_op; 748 struct flock *a_fl; 749 int a_flags; 750 } */ *ap = v; 751 struct sysvbfs_node *bnode = ap->a_vp->v_data; 752 753 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 754 755 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 756 } 757 758 int 759 sysvbfs_pathconf(void *v) 760 { 761 struct vop_pathconf_args /* { 762 struct vnode *a_vp; 763 int a_name; 764 register_t *a_retval; 765 } */ *ap = v; 766 int err = 0; 767 768 DPRINTF("%s:\n", __func__); 769 770 switch (ap->a_name) { 771 case _PC_LINK_MAX: 772 *ap->a_retval = 1; 773 break; 774 case _PC_NAME_MAX: 775 *ap->a_retval = BFS_FILENAME_MAXLEN; 776 break; 777 case _PC_PATH_MAX: 778 *ap->a_retval = BFS_FILENAME_MAXLEN; 779 break; 780 case _PC_CHOWN_RESTRICTED: 781 *ap->a_retval = 1; 782 break; 783 case _PC_NO_TRUNC: 784 *ap->a_retval = 0; 785 break; 786 case _PC_SYNC_IO: 787 *ap->a_retval = 1; 788 break; 789 case _PC_FILESIZEBITS: 790 *ap->a_retval = 32; 791 break; 792 default: 793 err = EINVAL; 794 break; 795 } 796 797 return err; 798 } 799 800 int 801 sysvbfs_fsync(void *v) 802 { 803 struct vop_fsync_args /* { 804 struct vnode *a_vp; 805 kauth_cred_t a_cred; 806 int a_flags; 807 off_t offlo; 808 off_t offhi; 809 } */ *ap = v; 810 struct vnode *vp = ap->a_vp; 811 int error, wait; 812 813 if (ap->a_flags & FSYNC_CACHE) { 814 return EOPNOTSUPP; 815 } 816 817 wait = (ap->a_flags & FSYNC_WAIT) != 0; 818 error = vflushbuf(vp, wait); 819 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 820 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 821 822 return error; 823 } 824 825 int 826 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 827 const struct timespec *mod, int flags) 828 { 829 struct sysvbfs_node *bnode = vp->v_data; 830 struct bfs_fileattr attr; 831 832 DPRINTF("%s:\n", __func__); 833 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 834 if (bnode->update_atime) { 835 attr.atime = acc ? acc->tv_sec : time_second; 836 bnode->update_atime = false; 837 } 838 if (bnode->update_ctime) { 839 attr.ctime = time_second; 840 bnode->update_ctime = false; 841 } 842 if (bnode->update_mtime) { 843 attr.mtime = mod ? mod->tv_sec : time_second; 844 bnode->update_mtime = false; 845 } 846 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 847 848 return 0; 849 } 850