sysvbfs_vnops.c revision 1.41
1 /* $NetBSD: sysvbfs_vnops.c,v 1.41 2012/03/13 18:40:50 elad 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 1.41 2012/03/13 18:40:50 elad 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 kauth_authorize_vnode(cred, kauth_access_action(mode, 253 vp->v_type, attr->mode), vp, NULL, genfs_can_access(vp->v_type, 254 attr->mode, attr->uid, attr->gid, mode, cred)); 255 } 256 257 int 258 sysvbfs_access(void *arg) 259 { 260 struct vop_access_args /* { 261 struct vnode *a_vp; 262 int a_mode; 263 kauth_cred_t a_cred; 264 } */ *ap = arg; 265 struct vnode *vp = ap->a_vp; 266 struct sysvbfs_node *bnode = vp->v_data; 267 int error; 268 269 DPRINTF("%s:\n", __func__); 270 271 error = sysvbfs_check_possible(vp, bnode, ap->a_mode); 272 if (error) 273 return error; 274 275 error = sysvbfs_check_permitted(vp, bnode, ap->a_mode, ap->a_cred); 276 277 return error; 278 } 279 280 int 281 sysvbfs_getattr(void *v) 282 { 283 struct vop_getattr_args /* { 284 struct vnode *a_vp; 285 struct vattr *a_vap; 286 kauth_cred_t a_cred; 287 } */ *ap = v; 288 struct vnode *vp = ap->a_vp; 289 struct sysvbfs_node *bnode = vp->v_data; 290 struct bfs_inode *inode = bnode->inode; 291 struct bfs_fileattr *attr = &inode->attr; 292 struct sysvbfs_mount *bmp = bnode->bmp; 293 struct vattr *vap = ap->a_vap; 294 295 DPRINTF("%s:\n", __func__); 296 297 vap->va_type = vp->v_type; 298 vap->va_mode = attr->mode; 299 vap->va_nlink = attr->nlink; 300 vap->va_uid = attr->uid; 301 vap->va_gid = attr->gid; 302 vap->va_fsid = bmp->devvp->v_rdev; 303 vap->va_fileid = inode->number; 304 vap->va_size = bfs_file_size(inode); 305 vap->va_blocksize = BFS_BSIZE; 306 vap->va_atime.tv_sec = attr->atime; 307 vap->va_mtime.tv_sec = attr->mtime; 308 vap->va_ctime.tv_sec = attr->ctime; 309 vap->va_birthtime.tv_sec = 0; 310 vap->va_gen = 1; 311 vap->va_flags = 0; 312 vap->va_rdev = 0; /* No device file */ 313 vap->va_bytes = vap->va_size; 314 vap->va_filerev = 0; 315 vap->va_vaflags = 0; 316 317 return 0; 318 } 319 320 int 321 sysvbfs_setattr(void *arg) 322 { 323 struct vop_setattr_args /* { 324 struct vnode *a_vp; 325 struct vattr *a_vap; 326 kauth_cred_t a_cred; 327 struct proc *p; 328 } */ *ap = arg; 329 struct vnode *vp = ap->a_vp; 330 struct vattr *vap = ap->a_vap; 331 struct sysvbfs_node *bnode = vp->v_data; 332 struct bfs_inode *inode = bnode->inode; 333 struct bfs_fileattr *attr = &inode->attr; 334 struct bfs *bfs = bnode->bmp->bfs; 335 kauth_cred_t cred = ap->a_cred; 336 int error; 337 338 DPRINTF("%s:\n", __func__); 339 if (vp->v_mount->mnt_flag & MNT_RDONLY) 340 return EROFS; 341 342 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 343 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 344 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 345 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) 346 return EINVAL; 347 348 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (uid_t)VNOVAL) { 349 uid_t uid = 350 (vap->va_uid != (uid_t)VNOVAL) ? vap->va_uid : attr->uid; 351 gid_t gid = 352 (vap->va_gid != (gid_t)VNOVAL) ? vap->va_gid : attr->gid; 353 error = kauth_authorize_vnode(cred, 354 KAUTH_VNODE_CHANGE_OWNERSHIP, vp, NULL, 355 genfs_can_chown(cred, attr->uid, attr->gid, uid, gid)); 356 if (error) 357 return error; 358 attr->uid = uid; 359 attr->gid = gid; 360 } 361 362 if (vap->va_mode != (mode_t)VNOVAL) { 363 mode_t mode = vap->va_mode; 364 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, 365 vp, NULL, genfs_can_chmod(vp->v_type, cred, attr->uid, attr->gid, 366 mode)); 367 if (error) 368 return error; 369 attr->mode = mode; 370 } 371 372 if ((vap->va_atime.tv_sec != VNOVAL) || 373 (vap->va_mtime.tv_sec != VNOVAL) || 374 (vap->va_ctime.tv_sec != VNOVAL)) { 375 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 376 NULL, genfs_can_chtimes(vp, vap->va_vaflags, attr->uid, cred)); 377 if (error) 378 return error; 379 380 if (vap->va_atime.tv_sec != VNOVAL) 381 attr->atime = vap->va_atime.tv_sec; 382 if (vap->va_mtime.tv_sec != VNOVAL) 383 attr->mtime = vap->va_mtime.tv_sec; 384 if (vap->va_ctime.tv_sec != VNOVAL) 385 attr->ctime = vap->va_ctime.tv_sec; 386 } 387 388 bfs_inode_set_attr(bfs, inode, attr); 389 390 return 0; 391 } 392 393 int 394 sysvbfs_read(void *arg) 395 { 396 struct vop_read_args /* { 397 struct vnode *a_vp; 398 struct uio *a_uio; 399 int a_ioflag; 400 kauth_cred_t a_cred; 401 } */ *a = arg; 402 struct vnode *v = a->a_vp; 403 struct uio *uio = a->a_uio; 404 struct sysvbfs_node *bnode = v->v_data; 405 struct bfs_inode *inode = bnode->inode; 406 vsize_t sz, filesz = bfs_file_size(inode); 407 int err; 408 const int advice = IO_ADV_DECODE(a->a_ioflag); 409 410 DPRINTF("%s: type=%d\n", __func__, v->v_type); 411 switch (v->v_type) { 412 case VREG: 413 break; 414 case VDIR: 415 return EISDIR; 416 default: 417 return EINVAL; 418 } 419 420 while (uio->uio_resid > 0) { 421 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 422 break; 423 424 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 425 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(v)); 426 if (err) 427 break; 428 DPRINTF("%s: read %ldbyte\n", __func__, sz); 429 } 430 431 return sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 432 } 433 434 int 435 sysvbfs_write(void *arg) 436 { 437 struct vop_write_args /* { 438 struct vnode *a_vp; 439 struct uio *a_uio; 440 int a_ioflag; 441 kauth_cred_t a_cred; 442 } */ *a = arg; 443 struct vnode *v = a->a_vp; 444 struct uio *uio = a->a_uio; 445 int advice = IO_ADV_DECODE(a->a_ioflag); 446 struct sysvbfs_node *bnode = v->v_data; 447 struct bfs_inode *inode = bnode->inode; 448 bool extended = false; 449 vsize_t sz; 450 int err = 0; 451 452 if (a->a_vp->v_type != VREG) 453 return EISDIR; 454 455 if (a->a_ioflag & IO_APPEND) 456 uio->uio_offset = bnode->size; 457 458 if (uio->uio_resid == 0) 459 return 0; 460 461 if (bnode->size < uio->uio_offset + uio->uio_resid) { 462 bnode->size = uio->uio_offset + uio->uio_resid; 463 uvm_vnp_setsize(v, bnode->size); 464 extended = true; 465 } 466 467 while (uio->uio_resid > 0) { 468 sz = uio->uio_resid; 469 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 470 UBC_WRITE | UBC_UNMAP_FLAG(v)); 471 if (err) 472 break; 473 DPRINTF("%s: write %ldbyte\n", __func__, sz); 474 } 475 inode->end_sector = bnode->data_block + 476 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 477 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 478 bnode->size - 1; 479 bnode->update_mtime = true; 480 481 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 482 483 return err; 484 } 485 486 int 487 sysvbfs_remove(void *arg) 488 { 489 struct vop_remove_args /* { 490 struct vnodeop_desc *a_desc; 491 struct vnode * a_dvp; 492 struct vnode * a_vp; 493 struct componentname * a_cnp; 494 } */ *ap = arg; 495 struct vnode *vp = ap->a_vp; 496 struct vnode *dvp = ap->a_dvp; 497 struct sysvbfs_node *bnode = vp->v_data; 498 struct sysvbfs_mount *bmp = bnode->bmp; 499 struct bfs *bfs = bmp->bfs; 500 int err; 501 502 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 503 504 if (vp->v_type == VDIR) 505 return EPERM; 506 507 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr)) != 0) 508 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 509 510 VN_KNOTE(ap->a_vp, NOTE_DELETE); 511 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 512 if (dvp == vp) 513 vrele(vp); 514 else 515 vput(vp); 516 vput(dvp); 517 518 if (err == 0) { 519 bnode->removed = 1; 520 } 521 522 return err; 523 } 524 525 int 526 sysvbfs_rename(void *arg) 527 { 528 struct vop_rename_args /* { 529 struct vnode *a_fdvp; from parent-directory v-node 530 struct vnode *a_fvp; from file v-node 531 struct componentname *a_fcnp; 532 struct vnode *a_tdvp; to parent-directory 533 struct vnode *a_tvp; to file v-node 534 struct componentname *a_tcnp; 535 } */ *ap = arg; 536 struct vnode *fvp = ap->a_fvp; 537 struct vnode *fdvp = ap->a_fdvp; 538 struct vnode *tvp = ap->a_tvp; 539 struct vnode *tdvp = ap->a_tdvp; 540 struct sysvbfs_node *bnode = fvp->v_data; 541 struct bfs *bfs = bnode->bmp->bfs; 542 const char *from_name = ap->a_fcnp->cn_nameptr; 543 const char *to_name = ap->a_tcnp->cn_nameptr; 544 int error; 545 546 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 547 if ((fvp->v_mount != tdvp->v_mount) || 548 (tvp && (fvp->v_mount != tvp->v_mount))) { 549 error = EXDEV; 550 printf("cross-device link\n"); 551 goto out; 552 } 553 554 KDASSERT(fvp->v_type == VREG); 555 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 556 KASSERT(tdvp == fdvp); 557 558 /* 559 * Make sure the source hasn't been removed between lookup 560 * and target directory lock. 561 */ 562 if (bnode->removed) { 563 error = ENOENT; 564 goto out; 565 } 566 567 error = bfs_file_rename(bfs, from_name, to_name); 568 out: 569 if (tvp) { 570 if (error == 0) { 571 struct sysvbfs_node *tbnode = tvp->v_data; 572 tbnode->removed = 1; 573 } 574 vput(tvp); 575 } 576 577 /* tdvp == tvp probably can't happen with this fs, but safety first */ 578 if (tdvp == tvp) 579 vrele(tdvp); 580 else 581 vput(tdvp); 582 583 vrele(fdvp); 584 vrele(fvp); 585 586 return 0; 587 } 588 589 int 590 sysvbfs_readdir(void *v) 591 { 592 struct vop_readdir_args /* { 593 struct vnode *a_vp; 594 struct uio *a_uio; 595 kauth_cred_t a_cred; 596 int *a_eofflag; 597 off_t **a_cookies; 598 int *a_ncookies; 599 } */ *ap = v; 600 struct uio *uio = ap->a_uio; 601 struct vnode *vp = ap->a_vp; 602 struct sysvbfs_node *bnode = vp->v_data; 603 struct bfs *bfs = bnode->bmp->bfs; 604 struct dirent *dp; 605 struct bfs_dirent *file; 606 int i, n, error; 607 608 DPRINTF("%s: offset=%" PRId64 " residue=%zu\n", __func__, 609 uio->uio_offset, uio->uio_resid); 610 611 KDASSERT(vp->v_type == VDIR); 612 KDASSERT(uio->uio_offset >= 0); 613 614 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 615 616 i = uio->uio_offset / sizeof(struct dirent); 617 n = uio->uio_resid / sizeof(struct dirent); 618 if ((i + n) > bfs->n_dirent) 619 n = bfs->n_dirent - i; 620 621 for (file = &bfs->dirent[i]; i < n; file++) { 622 if (file->inode == 0) 623 continue; 624 if (i == bfs->max_dirent) { 625 DPRINTF("%s: file system inconsistent.\n", 626 __func__); 627 break; 628 } 629 i++; 630 memset(dp, 0, sizeof(struct dirent)); 631 dp->d_fileno = file->inode; 632 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 633 dp->d_namlen = strlen(file->name); 634 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 635 dp->d_reclen = sizeof(struct dirent); 636 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 637 DPRINTF("%s: uiomove failed.\n", __func__); 638 free(dp, M_BFS); 639 return error; 640 } 641 } 642 DPRINTF("%s: %d %d %d\n", __func__, i, n, bfs->n_dirent); 643 *ap->a_eofflag = (i == bfs->n_dirent); 644 645 free(dp, M_BFS); 646 return 0; 647 } 648 649 int 650 sysvbfs_inactive(void *arg) 651 { 652 struct vop_inactive_args /* { 653 struct vnode *a_vp; 654 bool *a_recycle; 655 } */ *a = arg; 656 struct vnode *v = a->a_vp; 657 struct sysvbfs_node *bnode = v->v_data; 658 659 DPRINTF("%s:\n", __func__); 660 if (bnode->removed) 661 *a->a_recycle = true; 662 else 663 *a->a_recycle = false; 664 VOP_UNLOCK(v); 665 666 return 0; 667 } 668 669 int 670 sysvbfs_reclaim(void *v) 671 { 672 extern struct pool sysvbfs_node_pool; 673 struct vop_reclaim_args /* { 674 struct vnode *a_vp; 675 } */ *ap = v; 676 struct vnode *vp = ap->a_vp; 677 struct sysvbfs_node *bnode = vp->v_data; 678 679 DPRINTF("%s:\n", __func__); 680 mutex_enter(&mntvnode_lock); 681 LIST_REMOVE(bnode, link); 682 mutex_exit(&mntvnode_lock); 683 genfs_node_destroy(vp); 684 pool_put(&sysvbfs_node_pool, bnode); 685 vp->v_data = NULL; 686 687 return 0; 688 } 689 690 int 691 sysvbfs_bmap(void *arg) 692 { 693 struct vop_bmap_args /* { 694 struct vnode *a_vp; 695 daddr_t a_bn; 696 struct vnode **a_vpp; 697 daddr_t *a_bnp; 698 int *a_runp; 699 } */ *a = arg; 700 struct vnode *v = a->a_vp; 701 struct sysvbfs_node *bnode = v->v_data; 702 struct sysvbfs_mount *bmp = bnode->bmp; 703 struct bfs_inode *inode = bnode->inode; 704 daddr_t blk; 705 706 DPRINTF("%s:\n", __func__); 707 /* BFS algorithm is contiguous allocation */ 708 blk = inode->start_sector + a->a_bn; 709 710 if (blk * BFS_BSIZE > bmp->bfs->data_end) 711 return ENOSPC; 712 713 *a->a_vpp = bmp->devvp; 714 *a->a_runp = 0; 715 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 716 a->a_bn); 717 718 *a->a_bnp = blk; 719 720 721 return 0; 722 } 723 724 int 725 sysvbfs_strategy(void *arg) 726 { 727 struct vop_strategy_args /* { 728 struct vnode *a_vp; 729 struct buf *a_bp; 730 } */ *a = arg; 731 struct buf *b = a->a_bp; 732 struct vnode *v = a->a_vp; 733 struct sysvbfs_node *bnode = v->v_data; 734 struct sysvbfs_mount *bmp = bnode->bmp; 735 int error; 736 737 DPRINTF("%s:\n", __func__); 738 KDASSERT(v->v_type == VREG); 739 if (b->b_blkno == b->b_lblkno) { 740 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 741 if (error) { 742 b->b_error = error; 743 biodone(b); 744 return error; 745 } 746 if ((long)b->b_blkno == -1) 747 clrbuf(b); 748 } 749 if ((long)b->b_blkno == -1) { 750 biodone(b); 751 return 0; 752 } 753 754 return VOP_STRATEGY(bmp->devvp, b); 755 } 756 757 int 758 sysvbfs_print(void *v) 759 { 760 struct vop_print_args /* { 761 struct vnode *a_vp; 762 } */ *ap = v; 763 struct sysvbfs_node *bnode = ap->a_vp->v_data; 764 765 DPRINTF("%s:\n", __func__); 766 bfs_dump(bnode->bmp->bfs); 767 768 return 0; 769 } 770 771 int 772 sysvbfs_advlock(void *v) 773 { 774 struct vop_advlock_args /* { 775 struct vnode *a_vp; 776 void *a_id; 777 int a_op; 778 struct flock *a_fl; 779 int a_flags; 780 } */ *ap = v; 781 struct sysvbfs_node *bnode = ap->a_vp->v_data; 782 783 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 784 785 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 786 } 787 788 int 789 sysvbfs_pathconf(void *v) 790 { 791 struct vop_pathconf_args /* { 792 struct vnode *a_vp; 793 int a_name; 794 register_t *a_retval; 795 } */ *ap = v; 796 int err = 0; 797 798 DPRINTF("%s:\n", __func__); 799 800 switch (ap->a_name) { 801 case _PC_LINK_MAX: 802 *ap->a_retval = 1; 803 break; 804 case _PC_NAME_MAX: 805 *ap->a_retval = BFS_FILENAME_MAXLEN; 806 break; 807 case _PC_PATH_MAX: 808 *ap->a_retval = BFS_FILENAME_MAXLEN; 809 break; 810 case _PC_CHOWN_RESTRICTED: 811 *ap->a_retval = 1; 812 break; 813 case _PC_NO_TRUNC: 814 *ap->a_retval = 0; 815 break; 816 case _PC_SYNC_IO: 817 *ap->a_retval = 1; 818 break; 819 case _PC_FILESIZEBITS: 820 *ap->a_retval = 32; 821 break; 822 default: 823 err = EINVAL; 824 break; 825 } 826 827 return err; 828 } 829 830 int 831 sysvbfs_fsync(void *v) 832 { 833 struct vop_fsync_args /* { 834 struct vnode *a_vp; 835 kauth_cred_t a_cred; 836 int a_flags; 837 off_t offlo; 838 off_t offhi; 839 } */ *ap = v; 840 struct vnode *vp = ap->a_vp; 841 int error, wait; 842 843 if (ap->a_flags & FSYNC_CACHE) { 844 return EOPNOTSUPP; 845 } 846 847 wait = (ap->a_flags & FSYNC_WAIT) != 0; 848 error = vflushbuf(vp, wait); 849 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 850 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 851 852 return error; 853 } 854 855 int 856 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 857 const struct timespec *mod, int flags) 858 { 859 struct sysvbfs_node *bnode = vp->v_data; 860 struct bfs_fileattr attr; 861 862 DPRINTF("%s:\n", __func__); 863 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 864 if (bnode->update_atime) { 865 attr.atime = acc ? acc->tv_sec : time_second; 866 bnode->update_atime = false; 867 } 868 if (bnode->update_ctime) { 869 attr.ctime = time_second; 870 bnode->update_ctime = false; 871 } 872 if (bnode->update_mtime) { 873 attr.mtime = mod ? mod->tv_sec : time_second; 874 bnode->update_mtime = false; 875 } 876 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 877 878 return 0; 879 } 880
Indexes created Mon Sep 29 21:09:56 GMT 2025