sysvbfs_vnops.c revision 1.38.8.1
1 /* $NetBSD: sysvbfs_vnops.c,v 1.38.8.1 2012/02/18 07:35:25 mrg 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 1.38.8.1 2012/02/18 07:35:25 mrg 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 kauth_cred_t cred = ap->a_cred; 335 int error; 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 || vap->va_gid != (uid_t)VNOVAL) { 348 uid_t uid = 349 (vap->va_uid != (uid_t)VNOVAL) ? vap->va_uid : attr->uid; 350 gid_t gid = 351 (vap->va_gid != (gid_t)VNOVAL) ? vap->va_gid : attr->gid; 352 error = kauth_authorize_vnode(cred, 353 KAUTH_VNODE_CHANGE_OWNERSHIP, vp, NULL, 354 genfs_can_chown(vp, cred, attr->uid, attr->gid, uid, gid)); 355 if (error) 356 return error; 357 attr->uid = uid; 358 attr->gid = gid; 359 } 360 361 if (vap->va_mode != (mode_t)VNOVAL) { 362 mode_t mode = vap->va_mode; 363 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, 364 vp, NULL, genfs_can_chmod(vp, cred, attr->uid, attr->gid, 365 mode)); 366 if (error) 367 return error; 368 attr->mode = mode; 369 } 370 371 if (vap->va_atime.tv_sec != VNOVAL) 372 attr->atime = vap->va_atime.tv_sec; 373 if (vap->va_mtime.tv_sec != VNOVAL) 374 attr->mtime = vap->va_mtime.tv_sec; 375 if (vap->va_ctime.tv_sec != VNOVAL) 376 attr->ctime = vap->va_ctime.tv_sec; 377 378 bfs_inode_set_attr(bfs, inode, attr); 379 380 return 0; 381 } 382 383 int 384 sysvbfs_read(void *arg) 385 { 386 struct vop_read_args /* { 387 struct vnode *a_vp; 388 struct uio *a_uio; 389 int a_ioflag; 390 kauth_cred_t a_cred; 391 } */ *a = arg; 392 struct vnode *v = a->a_vp; 393 struct uio *uio = a->a_uio; 394 struct sysvbfs_node *bnode = v->v_data; 395 struct bfs_inode *inode = bnode->inode; 396 vsize_t sz, filesz = bfs_file_size(inode); 397 int err; 398 const int advice = IO_ADV_DECODE(a->a_ioflag); 399 400 DPRINTF("%s: type=%d\n", __func__, v->v_type); 401 switch (v->v_type) { 402 case VREG: 403 break; 404 case VDIR: 405 return EISDIR; 406 default: 407 return EINVAL; 408 } 409 410 while (uio->uio_resid > 0) { 411 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 412 break; 413 414 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 415 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(v)); 416 if (err) 417 break; 418 DPRINTF("%s: read %ldbyte\n", __func__, sz); 419 } 420 421 return sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 422 } 423 424 int 425 sysvbfs_write(void *arg) 426 { 427 struct vop_write_args /* { 428 struct vnode *a_vp; 429 struct uio *a_uio; 430 int a_ioflag; 431 kauth_cred_t a_cred; 432 } */ *a = arg; 433 struct vnode *v = a->a_vp; 434 struct uio *uio = a->a_uio; 435 int advice = IO_ADV_DECODE(a->a_ioflag); 436 struct sysvbfs_node *bnode = v->v_data; 437 struct bfs_inode *inode = bnode->inode; 438 bool extended = false; 439 vsize_t sz; 440 int err = 0; 441 442 if (a->a_vp->v_type != VREG) 443 return EISDIR; 444 445 if (a->a_ioflag & IO_APPEND) 446 uio->uio_offset = bnode->size; 447 448 if (uio->uio_resid == 0) 449 return 0; 450 451 if (bnode->size < uio->uio_offset + uio->uio_resid) { 452 bnode->size = uio->uio_offset + uio->uio_resid; 453 uvm_vnp_setsize(v, bnode->size); 454 extended = true; 455 } 456 457 while (uio->uio_resid > 0) { 458 sz = uio->uio_resid; 459 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 460 UBC_WRITE | UBC_UNMAP_FLAG(v)); 461 if (err) 462 break; 463 DPRINTF("%s: write %ldbyte\n", __func__, sz); 464 } 465 inode->end_sector = bnode->data_block + 466 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 467 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 468 bnode->size - 1; 469 bnode->update_mtime = true; 470 471 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 472 473 return err; 474 } 475 476 int 477 sysvbfs_remove(void *arg) 478 { 479 struct vop_remove_args /* { 480 struct vnodeop_desc *a_desc; 481 struct vnode * a_dvp; 482 struct vnode * a_vp; 483 struct componentname * a_cnp; 484 } */ *ap = arg; 485 struct vnode *vp = ap->a_vp; 486 struct vnode *dvp = ap->a_dvp; 487 struct sysvbfs_node *bnode = vp->v_data; 488 struct sysvbfs_mount *bmp = bnode->bmp; 489 struct bfs *bfs = bmp->bfs; 490 int err; 491 492 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 493 494 if (vp->v_type == VDIR) 495 return EPERM; 496 497 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr)) != 0) 498 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 499 500 VN_KNOTE(ap->a_vp, NOTE_DELETE); 501 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 502 if (dvp == vp) 503 vrele(vp); 504 else 505 vput(vp); 506 vput(dvp); 507 508 if (err == 0) { 509 bnode->removed = 1; 510 } 511 512 return err; 513 } 514 515 int 516 sysvbfs_rename(void *arg) 517 { 518 struct vop_rename_args /* { 519 struct vnode *a_fdvp; from parent-directory v-node 520 struct vnode *a_fvp; from file v-node 521 struct componentname *a_fcnp; 522 struct vnode *a_tdvp; to parent-directory 523 struct vnode *a_tvp; to file v-node 524 struct componentname *a_tcnp; 525 } */ *ap = arg; 526 struct vnode *fvp = ap->a_fvp; 527 struct vnode *fdvp = ap->a_fdvp; 528 struct vnode *tvp = ap->a_tvp; 529 struct vnode *tdvp = ap->a_tdvp; 530 struct sysvbfs_node *bnode = fvp->v_data; 531 struct bfs *bfs = bnode->bmp->bfs; 532 const char *from_name = ap->a_fcnp->cn_nameptr; 533 const char *to_name = ap->a_tcnp->cn_nameptr; 534 int error; 535 536 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 537 if ((fvp->v_mount != tdvp->v_mount) || 538 (tvp && (fvp->v_mount != tvp->v_mount))) { 539 error = EXDEV; 540 printf("cross-device link\n"); 541 goto out; 542 } 543 544 KDASSERT(fvp->v_type == VREG); 545 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 546 KASSERT(tdvp == fdvp); 547 548 /* 549 * Make sure the source hasn't been removed between lookup 550 * and target directory lock. 551 */ 552 if (bnode->removed) { 553 error = ENOENT; 554 goto out; 555 } 556 557 error = bfs_file_rename(bfs, from_name, to_name); 558 out: 559 if (tvp) { 560 if (error == 0) { 561 struct sysvbfs_node *tbnode = tvp->v_data; 562 tbnode->removed = 1; 563 } 564 vput(tvp); 565 } 566 567 /* tdvp == tvp probably can't happen with this fs, but safety first */ 568 if (tdvp == tvp) 569 vrele(tdvp); 570 else 571 vput(tdvp); 572 573 vrele(fdvp); 574 vrele(fvp); 575 576 return 0; 577 } 578 579 int 580 sysvbfs_readdir(void *v) 581 { 582 struct vop_readdir_args /* { 583 struct vnode *a_vp; 584 struct uio *a_uio; 585 kauth_cred_t a_cred; 586 int *a_eofflag; 587 off_t **a_cookies; 588 int *a_ncookies; 589 } */ *ap = v; 590 struct uio *uio = ap->a_uio; 591 struct vnode *vp = ap->a_vp; 592 struct sysvbfs_node *bnode = vp->v_data; 593 struct bfs *bfs = bnode->bmp->bfs; 594 struct dirent *dp; 595 struct bfs_dirent *file; 596 int i, n, error; 597 598 DPRINTF("%s: offset=%" PRId64 " residue=%zu\n", __func__, 599 uio->uio_offset, uio->uio_resid); 600 601 KDASSERT(vp->v_type == VDIR); 602 KDASSERT(uio->uio_offset >= 0); 603 604 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 605 606 i = uio->uio_offset / sizeof(struct dirent); 607 n = uio->uio_resid / sizeof(struct dirent); 608 if ((i + n) > bfs->n_dirent) 609 n = bfs->n_dirent - i; 610 611 for (file = &bfs->dirent[i]; i < n; file++) { 612 if (file->inode == 0) 613 continue; 614 if (i == bfs->max_dirent) { 615 DPRINTF("%s: file system inconsistent.\n", 616 __func__); 617 break; 618 } 619 i++; 620 memset(dp, 0, sizeof(struct dirent)); 621 dp->d_fileno = file->inode; 622 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 623 dp->d_namlen = strlen(file->name); 624 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 625 dp->d_reclen = sizeof(struct dirent); 626 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 627 DPRINTF("%s: uiomove failed.\n", __func__); 628 free(dp, M_BFS); 629 return error; 630 } 631 } 632 DPRINTF("%s: %d %d %d\n", __func__, i, n, bfs->n_dirent); 633 *ap->a_eofflag = (i == bfs->n_dirent); 634 635 free(dp, M_BFS); 636 return 0; 637 } 638 639 int 640 sysvbfs_inactive(void *arg) 641 { 642 struct vop_inactive_args /* { 643 struct vnode *a_vp; 644 bool *a_recycle; 645 } */ *a = arg; 646 struct vnode *v = a->a_vp; 647 struct sysvbfs_node *bnode = v->v_data; 648 649 DPRINTF("%s:\n", __func__); 650 if (bnode->removed) 651 *a->a_recycle = true; 652 else 653 *a->a_recycle = false; 654 VOP_UNLOCK(v); 655 656 return 0; 657 } 658 659 int 660 sysvbfs_reclaim(void *v) 661 { 662 extern struct pool sysvbfs_node_pool; 663 struct vop_reclaim_args /* { 664 struct vnode *a_vp; 665 } */ *ap = v; 666 struct vnode *vp = ap->a_vp; 667 struct sysvbfs_node *bnode = vp->v_data; 668 669 DPRINTF("%s:\n", __func__); 670 mutex_enter(&mntvnode_lock); 671 LIST_REMOVE(bnode, link); 672 mutex_exit(&mntvnode_lock); 673 genfs_node_destroy(vp); 674 pool_put(&sysvbfs_node_pool, bnode); 675 vp->v_data = NULL; 676 677 return 0; 678 } 679 680 int 681 sysvbfs_bmap(void *arg) 682 { 683 struct vop_bmap_args /* { 684 struct vnode *a_vp; 685 daddr_t a_bn; 686 struct vnode **a_vpp; 687 daddr_t *a_bnp; 688 int *a_runp; 689 } */ *a = arg; 690 struct vnode *v = a->a_vp; 691 struct sysvbfs_node *bnode = v->v_data; 692 struct sysvbfs_mount *bmp = bnode->bmp; 693 struct bfs_inode *inode = bnode->inode; 694 daddr_t blk; 695 696 DPRINTF("%s:\n", __func__); 697 /* BFS algorithm is contiguous allocation */ 698 blk = inode->start_sector + a->a_bn; 699 700 if (blk * BFS_BSIZE > bmp->bfs->data_end) 701 return ENOSPC; 702 703 *a->a_vpp = bmp->devvp; 704 *a->a_runp = 0; 705 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 706 a->a_bn); 707 708 *a->a_bnp = blk; 709 710 711 return 0; 712 } 713 714 int 715 sysvbfs_strategy(void *arg) 716 { 717 struct vop_strategy_args /* { 718 struct vnode *a_vp; 719 struct buf *a_bp; 720 } */ *a = arg; 721 struct buf *b = a->a_bp; 722 struct vnode *v = a->a_vp; 723 struct sysvbfs_node *bnode = v->v_data; 724 struct sysvbfs_mount *bmp = bnode->bmp; 725 int error; 726 727 DPRINTF("%s:\n", __func__); 728 KDASSERT(v->v_type == VREG); 729 if (b->b_blkno == b->b_lblkno) { 730 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 731 if (error) { 732 b->b_error = error; 733 biodone(b); 734 return error; 735 } 736 if ((long)b->b_blkno == -1) 737 clrbuf(b); 738 } 739 if ((long)b->b_blkno == -1) { 740 biodone(b); 741 return 0; 742 } 743 744 return VOP_STRATEGY(bmp->devvp, b); 745 } 746 747 int 748 sysvbfs_print(void *v) 749 { 750 struct vop_print_args /* { 751 struct vnode *a_vp; 752 } */ *ap = v; 753 struct sysvbfs_node *bnode = ap->a_vp->v_data; 754 755 DPRINTF("%s:\n", __func__); 756 bfs_dump(bnode->bmp->bfs); 757 758 return 0; 759 } 760 761 int 762 sysvbfs_advlock(void *v) 763 { 764 struct vop_advlock_args /* { 765 struct vnode *a_vp; 766 void *a_id; 767 int a_op; 768 struct flock *a_fl; 769 int a_flags; 770 } */ *ap = v; 771 struct sysvbfs_node *bnode = ap->a_vp->v_data; 772 773 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 774 775 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 776 } 777 778 int 779 sysvbfs_pathconf(void *v) 780 { 781 struct vop_pathconf_args /* { 782 struct vnode *a_vp; 783 int a_name; 784 register_t *a_retval; 785 } */ *ap = v; 786 int err = 0; 787 788 DPRINTF("%s:\n", __func__); 789 790 switch (ap->a_name) { 791 case _PC_LINK_MAX: 792 *ap->a_retval = 1; 793 break; 794 case _PC_NAME_MAX: 795 *ap->a_retval = BFS_FILENAME_MAXLEN; 796 break; 797 case _PC_PATH_MAX: 798 *ap->a_retval = BFS_FILENAME_MAXLEN; 799 break; 800 case _PC_CHOWN_RESTRICTED: 801 *ap->a_retval = 1; 802 break; 803 case _PC_NO_TRUNC: 804 *ap->a_retval = 0; 805 break; 806 case _PC_SYNC_IO: 807 *ap->a_retval = 1; 808 break; 809 case _PC_FILESIZEBITS: 810 *ap->a_retval = 32; 811 break; 812 default: 813 err = EINVAL; 814 break; 815 } 816 817 return err; 818 } 819 820 int 821 sysvbfs_fsync(void *v) 822 { 823 struct vop_fsync_args /* { 824 struct vnode *a_vp; 825 kauth_cred_t a_cred; 826 int a_flags; 827 off_t offlo; 828 off_t offhi; 829 } */ *ap = v; 830 struct vnode *vp = ap->a_vp; 831 int error, wait; 832 833 if (ap->a_flags & FSYNC_CACHE) { 834 return EOPNOTSUPP; 835 } 836 837 wait = (ap->a_flags & FSYNC_WAIT) != 0; 838 error = vflushbuf(vp, wait); 839 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 840 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 841 842 return error; 843 } 844 845 int 846 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 847 const struct timespec *mod, int flags) 848 { 849 struct sysvbfs_node *bnode = vp->v_data; 850 struct bfs_fileattr attr; 851 852 DPRINTF("%s:\n", __func__); 853 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 854 if (bnode->update_atime) { 855 attr.atime = acc ? acc->tv_sec : time_second; 856 bnode->update_atime = false; 857 } 858 if (bnode->update_ctime) { 859 attr.ctime = time_second; 860 bnode->update_ctime = false; 861 } 862 if (bnode->update_mtime) { 863 attr.mtime = mod ? mod->tv_sec : time_second; 864 bnode->update_mtime = false; 865 } 866 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 867 868 return 0; 869 } 870
Indexes created Mon Sep 29 21:09:56 GMT 2025