sysvbfs_vnops.c revision 1.46.2.1
1 /* $NetBSD: sysvbfs_vnops.c,v 1.46.2.1 2013/06/23 06:18:28 tls 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 1.46.2.1 2013/06/23 06:18:28 tls 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 static void sysvbfs_file_setsize(struct vnode *, size_t); 64 65 int 66 sysvbfs_lookup(void *arg) 67 { 68 struct vop_lookup_args /* { 69 struct vnode *a_dvp; 70 struct vnode **a_vpp; 71 struct componentname *a_cnp; 72 } */ *a = arg; 73 struct vnode *v = a->a_dvp; 74 struct sysvbfs_node *bnode = v->v_data; 75 struct bfs *bfs = bnode->bmp->bfs; /* my filesystem */ 76 struct vnode *vpp = NULL; 77 struct bfs_dirent *dirent = NULL; 78 struct componentname *cnp = a->a_cnp; 79 int nameiop = cnp->cn_nameiop; 80 const char *name = cnp->cn_nameptr; 81 int namelen = cnp->cn_namelen; 82 int error; 83 84 DPRINTF("%s: %s op=%d %d\n", __func__, name, nameiop, 85 cnp->cn_flags); 86 87 *a->a_vpp = NULL; 88 89 KASSERT((cnp->cn_flags & ISDOTDOT) == 0); 90 91 if ((error = VOP_ACCESS(a->a_dvp, VEXEC, cnp->cn_cred)) != 0) { 92 return error; /* directory permission. */ 93 } 94 95 /* Deny last component write operation on a read-only mount */ 96 if ((cnp->cn_flags & ISLASTCN) && (v->v_mount->mnt_flag & MNT_RDONLY) && 97 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 98 return EROFS; 99 100 if (namelen == 1 && name[0] == '.') { /* "." */ 101 vref(v); 102 *a->a_vpp = v; 103 } else { /* Regular file */ 104 if (!bfs_dirent_lookup_by_name(bfs, cnp->cn_nameptr, 105 &dirent)) { 106 if (nameiop != CREATE && nameiop != RENAME) { 107 DPRINTF("%s: no such a file. (1)\n", 108 __func__); 109 return ENOENT; 110 } 111 if ((error = VOP_ACCESS(v, VWRITE, cnp->cn_cred)) != 0) 112 return error; 113 return EJUSTRETURN; 114 } 115 116 /* Allocate v-node */ 117 if ((error = sysvbfs_vget(v->v_mount, dirent->inode, &vpp)) != 0) { 118 DPRINTF("%s: can't get vnode.\n", __func__); 119 return error; 120 } 121 *a->a_vpp = vpp; 122 } 123 124 return 0; 125 } 126 127 int 128 sysvbfs_create(void *arg) 129 { 130 struct vop_create_args /* { 131 struct vnode *a_dvp; 132 struct vnode **a_vpp; 133 struct componentname *a_cnp; 134 struct vattr *a_vap; 135 } */ *a = arg; 136 struct sysvbfs_node *bnode = a->a_dvp->v_data; 137 struct sysvbfs_mount *bmp = bnode->bmp; 138 struct bfs *bfs = bmp->bfs; 139 struct mount *mp = bmp->mountp; 140 struct bfs_dirent *dirent; 141 struct bfs_fileattr attr; 142 struct vattr *va = a->a_vap; 143 kauth_cred_t cr = a->a_cnp->cn_cred; 144 int err = 0; 145 146 DPRINTF("%s: %s\n", __func__, a->a_cnp->cn_nameptr); 147 KDASSERT(a->a_vap->va_type == VREG); 148 attr.uid = kauth_cred_geteuid(cr); 149 attr.gid = kauth_cred_getegid(cr); 150 attr.mode = va->va_mode; 151 152 if ((err = bfs_file_create(bfs, a->a_cnp->cn_nameptr, 0, 0, &attr)) 153 != 0) { 154 DPRINTF("%s: bfs_file_create failed.\n", __func__); 155 goto unlock_exit; 156 } 157 158 if (!bfs_dirent_lookup_by_name(bfs, a->a_cnp->cn_nameptr, &dirent)) 159 panic("no dirent for created file."); 160 161 if ((err = sysvbfs_vget(mp, dirent->inode, a->a_vpp)) != 0) { 162 DPRINTF("%s: sysvbfs_vget failed.\n", __func__); 163 goto unlock_exit; 164 } 165 bnode = (*a->a_vpp)->v_data; 166 bnode->update_ctime = true; 167 bnode->update_mtime = true; 168 bnode->update_atime = true; 169 170 unlock_exit: 171 /* unlock parent directory */ 172 vput(a->a_dvp); /* locked at sysvbfs_lookup(); */ 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__); 221 222 if (v->v_mount->mnt_flag & MNT_RDONLY) 223 goto out; 224 225 uvm_vnp_setsize(v, bnode->size); 226 227 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 228 if (bnode->update_atime) 229 attr.atime = time_second; 230 if (bnode->update_ctime) 231 attr.ctime = time_second; 232 if (bnode->update_mtime) 233 attr.mtime = time_second; 234 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 235 236 VOP_FSYNC(a->a_vp, a->a_cred, FSYNC_WAIT, 0, 0); 237 238 out: 239 return 0; 240 } 241 242 static int 243 sysvbfs_check_possible(struct vnode *vp, struct sysvbfs_node *bnode, 244 mode_t mode) 245 { 246 247 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 248 return EROFS; 249 250 return 0; 251 } 252 253 static int 254 sysvbfs_check_permitted(struct vnode *vp, struct sysvbfs_node *bnode, 255 mode_t mode, kauth_cred_t cred) 256 { 257 struct bfs_fileattr *attr = &bnode->inode->attr; 258 259 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 260 vp->v_type, attr->mode), vp, NULL, genfs_can_access(vp->v_type, 261 attr->mode, attr->uid, attr->gid, mode, cred)); 262 } 263 264 int 265 sysvbfs_access(void *arg) 266 { 267 struct vop_access_args /* { 268 struct vnode *a_vp; 269 int a_mode; 270 kauth_cred_t a_cred; 271 } */ *ap = arg; 272 struct vnode *vp = ap->a_vp; 273 struct sysvbfs_node *bnode = vp->v_data; 274 int error; 275 276 DPRINTF("%s:\n", __func__); 277 278 error = sysvbfs_check_possible(vp, bnode, ap->a_mode); 279 if (error) 280 return error; 281 282 error = sysvbfs_check_permitted(vp, bnode, ap->a_mode, ap->a_cred); 283 284 return error; 285 } 286 287 int 288 sysvbfs_getattr(void *v) 289 { 290 struct vop_getattr_args /* { 291 struct vnode *a_vp; 292 struct vattr *a_vap; 293 kauth_cred_t a_cred; 294 } */ *ap = v; 295 struct vnode *vp = ap->a_vp; 296 struct sysvbfs_node *bnode = vp->v_data; 297 struct bfs_inode *inode = bnode->inode; 298 struct bfs_fileattr *attr = &inode->attr; 299 struct sysvbfs_mount *bmp = bnode->bmp; 300 struct vattr *vap = ap->a_vap; 301 302 DPRINTF("%s:\n", __func__); 303 304 vap->va_type = vp->v_type; 305 vap->va_mode = attr->mode; 306 vap->va_nlink = attr->nlink; 307 vap->va_uid = attr->uid; 308 vap->va_gid = attr->gid; 309 vap->va_fsid = bmp->devvp->v_rdev; 310 vap->va_fileid = inode->number; 311 vap->va_size = bfs_file_size(inode); 312 vap->va_blocksize = BFS_BSIZE; 313 vap->va_atime.tv_sec = attr->atime; 314 vap->va_mtime.tv_sec = attr->mtime; 315 vap->va_ctime.tv_sec = attr->ctime; 316 vap->va_birthtime.tv_sec = 0; 317 vap->va_gen = 1; 318 vap->va_flags = 0; 319 vap->va_rdev = 0; /* No device file */ 320 vap->va_bytes = vap->va_size; 321 vap->va_filerev = 0; 322 vap->va_vaflags = 0; 323 324 return 0; 325 } 326 327 int 328 sysvbfs_setattr(void *arg) 329 { 330 struct vop_setattr_args /* { 331 struct vnode *a_vp; 332 struct vattr *a_vap; 333 kauth_cred_t a_cred; 334 struct proc *p; 335 } */ *ap = arg; 336 struct vnode *vp = ap->a_vp; 337 struct vattr *vap = ap->a_vap; 338 struct sysvbfs_node *bnode = vp->v_data; 339 struct bfs_inode *inode = bnode->inode; 340 struct bfs_fileattr *attr = &inode->attr; 341 struct bfs *bfs = bnode->bmp->bfs; 342 kauth_cred_t cred = ap->a_cred; 343 int error; 344 345 DPRINTF("%s:\n", __func__); 346 if (vp->v_mount->mnt_flag & MNT_RDONLY) 347 return EROFS; 348 349 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 350 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 351 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 352 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) 353 return EINVAL; 354 355 if (vap->va_flags != VNOVAL) 356 return EOPNOTSUPP; 357 358 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 359 uid_t uid = 360 (vap->va_uid != (uid_t)VNOVAL) ? vap->va_uid : attr->uid; 361 gid_t gid = 362 (vap->va_gid != (gid_t)VNOVAL) ? vap->va_gid : attr->gid; 363 error = kauth_authorize_vnode(cred, 364 KAUTH_VNODE_CHANGE_OWNERSHIP, vp, NULL, 365 genfs_can_chown(cred, attr->uid, attr->gid, uid, gid)); 366 if (error) 367 return error; 368 attr->uid = uid; 369 attr->gid = gid; 370 } 371 372 if (vap->va_size != VNOVAL) 373 switch (vp->v_type) { 374 case VDIR: 375 return EISDIR; 376 case VCHR: 377 case VBLK: 378 case VFIFO: 379 break; 380 case VREG: 381 if (vp->v_mount->mnt_flag & MNT_RDONLY) 382 return EROFS; 383 sysvbfs_file_setsize(vp, vap->va_size); 384 break; 385 default: 386 return EOPNOTSUPP; 387 } 388 389 if (vap->va_mode != (mode_t)VNOVAL) { 390 mode_t mode = vap->va_mode; 391 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, 392 vp, NULL, genfs_can_chmod(vp->v_type, cred, attr->uid, 393 attr->gid, mode)); 394 if (error) 395 return error; 396 attr->mode = mode; 397 } 398 399 if ((vap->va_atime.tv_sec != VNOVAL) || 400 (vap->va_mtime.tv_sec != VNOVAL) || 401 (vap->va_ctime.tv_sec != VNOVAL)) { 402 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 403 NULL, genfs_can_chtimes(vp, vap->va_vaflags, attr->uid, 404 cred)); 405 if (error) 406 return error; 407 408 if (vap->va_atime.tv_sec != VNOVAL) 409 attr->atime = vap->va_atime.tv_sec; 410 if (vap->va_mtime.tv_sec != VNOVAL) 411 attr->mtime = vap->va_mtime.tv_sec; 412 if (vap->va_ctime.tv_sec != VNOVAL) 413 attr->ctime = vap->va_ctime.tv_sec; 414 } 415 416 bfs_inode_set_attr(bfs, inode, attr); 417 418 return 0; 419 } 420 421 int 422 sysvbfs_read(void *arg) 423 { 424 struct vop_read_args /* { 425 struct vnode *a_vp; 426 struct uio *a_uio; 427 int a_ioflag; 428 kauth_cred_t a_cred; 429 } */ *a = arg; 430 struct vnode *v = a->a_vp; 431 struct uio *uio = a->a_uio; 432 struct sysvbfs_node *bnode = v->v_data; 433 struct bfs_inode *inode = bnode->inode; 434 vsize_t sz, filesz = bfs_file_size(inode); 435 int err; 436 const int advice = IO_ADV_DECODE(a->a_ioflag); 437 438 DPRINTF("%s: type=%d\n", __func__, v->v_type); 439 switch (v->v_type) { 440 case VREG: 441 break; 442 case VDIR: 443 return EISDIR; 444 default: 445 return EINVAL; 446 } 447 448 while (uio->uio_resid > 0) { 449 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 450 break; 451 452 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 453 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(v)); 454 if (err) 455 break; 456 DPRINTF("%s: read %ldbyte\n", __func__, sz); 457 } 458 459 return sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 460 } 461 462 int 463 sysvbfs_write(void *arg) 464 { 465 struct vop_write_args /* { 466 struct vnode *a_vp; 467 struct uio *a_uio; 468 int a_ioflag; 469 kauth_cred_t a_cred; 470 } */ *a = arg; 471 struct vnode *v = a->a_vp; 472 struct uio *uio = a->a_uio; 473 int advice = IO_ADV_DECODE(a->a_ioflag); 474 struct sysvbfs_node *bnode = v->v_data; 475 bool extended = false; 476 vsize_t sz; 477 int err = 0; 478 479 if (a->a_vp->v_type != VREG) 480 return EISDIR; 481 482 if (a->a_ioflag & IO_APPEND) 483 uio->uio_offset = bnode->size; 484 485 if (uio->uio_resid == 0) 486 return 0; 487 488 if (bnode->size < uio->uio_offset + uio->uio_resid) { 489 sysvbfs_file_setsize(v, uio->uio_offset + uio->uio_resid); 490 extended = true; 491 } 492 493 while (uio->uio_resid > 0) { 494 sz = uio->uio_resid; 495 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 496 UBC_WRITE | UBC_UNMAP_FLAG(v)); 497 if (err) 498 break; 499 DPRINTF("%s: write %ldbyte\n", __func__, sz); 500 } 501 if (err) 502 sysvbfs_file_setsize(v, bnode->size - uio->uio_resid); 503 504 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 505 506 return err; 507 } 508 509 int 510 sysvbfs_remove(void *arg) 511 { 512 struct vop_remove_args /* { 513 struct vnodeop_desc *a_desc; 514 struct vnode * a_dvp; 515 struct vnode * a_vp; 516 struct componentname * a_cnp; 517 } */ *ap = arg; 518 struct vnode *vp = ap->a_vp; 519 struct vnode *dvp = ap->a_dvp; 520 struct sysvbfs_node *bnode = vp->v_data; 521 struct sysvbfs_mount *bmp = bnode->bmp; 522 struct bfs *bfs = bmp->bfs; 523 int err; 524 525 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 526 527 if (vp->v_type == VDIR) 528 return EPERM; 529 530 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr)) != 0) 531 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 532 533 VN_KNOTE(ap->a_vp, NOTE_DELETE); 534 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 535 if (dvp == vp) 536 vrele(vp); 537 else 538 vput(vp); 539 vput(dvp); 540 541 if (err == 0) { 542 bnode->removed = 1; 543 } 544 545 return err; 546 } 547 548 int 549 sysvbfs_rename(void *arg) 550 { 551 struct vop_rename_args /* { 552 struct vnode *a_fdvp; from parent-directory v-node 553 struct vnode *a_fvp; from file v-node 554 struct componentname *a_fcnp; 555 struct vnode *a_tdvp; to parent-directory 556 struct vnode *a_tvp; to file v-node 557 struct componentname *a_tcnp; 558 } */ *ap = arg; 559 struct vnode *fvp = ap->a_fvp; 560 struct vnode *fdvp = ap->a_fdvp; 561 struct vnode *tvp = ap->a_tvp; 562 struct vnode *tdvp = ap->a_tdvp; 563 struct sysvbfs_node *bnode = fvp->v_data; 564 struct bfs *bfs = bnode->bmp->bfs; 565 const char *from_name = ap->a_fcnp->cn_nameptr; 566 const char *to_name = ap->a_tcnp->cn_nameptr; 567 int error; 568 569 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 570 if ((fvp->v_mount != tdvp->v_mount) || 571 (tvp && (fvp->v_mount != tvp->v_mount))) { 572 error = EXDEV; 573 printf("cross-device link\n"); 574 goto out; 575 } 576 577 KDASSERT(fvp->v_type == VREG); 578 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 579 KASSERT(tdvp == fdvp); 580 581 /* 582 * Make sure the source hasn't been removed between lookup 583 * and target directory lock. 584 */ 585 if (bnode->removed) { 586 error = ENOENT; 587 goto out; 588 } 589 590 error = bfs_file_rename(bfs, from_name, to_name); 591 out: 592 if (tvp) { 593 if (error == 0) { 594 struct sysvbfs_node *tbnode = tvp->v_data; 595 tbnode->removed = 1; 596 } 597 vput(tvp); 598 } 599 600 /* tdvp == tvp probably can't happen with this fs, but safety first */ 601 if (tdvp == tvp) 602 vrele(tdvp); 603 else 604 vput(tdvp); 605 606 vrele(fdvp); 607 vrele(fvp); 608 609 return 0; 610 } 611 612 int 613 sysvbfs_readdir(void *v) 614 { 615 struct vop_readdir_args /* { 616 struct vnode *a_vp; 617 struct uio *a_uio; 618 kauth_cred_t a_cred; 619 int *a_eofflag; 620 off_t **a_cookies; 621 int *a_ncookies; 622 } */ *ap = v; 623 struct uio *uio = ap->a_uio; 624 struct vnode *vp = ap->a_vp; 625 struct sysvbfs_node *bnode = vp->v_data; 626 struct bfs *bfs = bnode->bmp->bfs; 627 struct dirent *dp; 628 struct bfs_dirent *file; 629 int i, n, error; 630 631 DPRINTF("%s: offset=%" PRId64 " residue=%zu\n", __func__, 632 uio->uio_offset, uio->uio_resid); 633 634 KDASSERT(vp->v_type == VDIR); 635 KDASSERT(uio->uio_offset >= 0); 636 637 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 638 639 i = uio->uio_offset / sizeof(struct dirent); 640 n = uio->uio_resid / sizeof(struct dirent); 641 if ((i + n) > bfs->n_dirent) 642 n = bfs->n_dirent - i; 643 644 for (file = &bfs->dirent[i]; i < n; file++) { 645 if (file->inode == 0) 646 continue; 647 if (i == bfs->max_dirent) { 648 DPRINTF("%s: file system inconsistent.\n", 649 __func__); 650 break; 651 } 652 i++; 653 memset(dp, 0, sizeof(struct dirent)); 654 dp->d_fileno = file->inode; 655 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 656 dp->d_namlen = strlen(file->name); 657 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 658 dp->d_reclen = sizeof(struct dirent); 659 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 660 DPRINTF("%s: uiomove failed.\n", __func__); 661 free(dp, M_BFS); 662 return error; 663 } 664 } 665 DPRINTF("%s: %d %d %d\n", __func__, i, n, bfs->n_dirent); 666 *ap->a_eofflag = (i == bfs->n_dirent); 667 668 free(dp, M_BFS); 669 return 0; 670 } 671 672 int 673 sysvbfs_inactive(void *arg) 674 { 675 struct vop_inactive_args /* { 676 struct vnode *a_vp; 677 bool *a_recycle; 678 } */ *a = arg; 679 struct vnode *v = a->a_vp; 680 struct sysvbfs_node *bnode = v->v_data; 681 682 DPRINTF("%s:\n", __func__); 683 if (bnode->removed) 684 *a->a_recycle = true; 685 else 686 *a->a_recycle = false; 687 VOP_UNLOCK(v); 688 689 return 0; 690 } 691 692 int 693 sysvbfs_reclaim(void *v) 694 { 695 extern struct pool sysvbfs_node_pool; 696 struct vop_reclaim_args /* { 697 struct vnode *a_vp; 698 } */ *ap = v; 699 struct vnode *vp = ap->a_vp; 700 struct sysvbfs_node *bnode = vp->v_data; 701 702 DPRINTF("%s:\n", __func__); 703 mutex_enter(&mntvnode_lock); 704 LIST_REMOVE(bnode, link); 705 mutex_exit(&mntvnode_lock); 706 genfs_node_destroy(vp); 707 pool_put(&sysvbfs_node_pool, bnode); 708 vp->v_data = NULL; 709 710 return 0; 711 } 712 713 int 714 sysvbfs_bmap(void *arg) 715 { 716 struct vop_bmap_args /* { 717 struct vnode *a_vp; 718 daddr_t a_bn; 719 struct vnode **a_vpp; 720 daddr_t *a_bnp; 721 int *a_runp; 722 } */ *a = arg; 723 struct vnode *v = a->a_vp; 724 struct sysvbfs_node *bnode = v->v_data; 725 struct sysvbfs_mount *bmp = bnode->bmp; 726 struct bfs_inode *inode = bnode->inode; 727 daddr_t blk; 728 729 DPRINTF("%s:\n", __func__); 730 /* BFS algorithm is contiguous allocation */ 731 blk = inode->start_sector + a->a_bn; 732 733 if (blk * BFS_BSIZE > bmp->bfs->data_end) 734 return ENOSPC; 735 736 *a->a_vpp = bmp->devvp; 737 *a->a_runp = 0; 738 DPRINTF("%s: %d + %" PRId64 "\n", __func__, inode->start_sector, 739 a->a_bn); 740 741 *a->a_bnp = blk; 742 743 744 return 0; 745 } 746 747 int 748 sysvbfs_strategy(void *arg) 749 { 750 struct vop_strategy_args /* { 751 struct vnode *a_vp; 752 struct buf *a_bp; 753 } */ *a = arg; 754 struct buf *b = a->a_bp; 755 struct vnode *v = a->a_vp; 756 struct sysvbfs_node *bnode = v->v_data; 757 struct sysvbfs_mount *bmp = bnode->bmp; 758 int error; 759 760 DPRINTF("%s:\n", __func__); 761 KDASSERT(v->v_type == VREG); 762 if (b->b_blkno == b->b_lblkno) { 763 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 764 if (error) { 765 b->b_error = error; 766 biodone(b); 767 return error; 768 } 769 if ((long)b->b_blkno == -1) 770 clrbuf(b); 771 } 772 if ((long)b->b_blkno == -1) { 773 biodone(b); 774 return 0; 775 } 776 777 return VOP_STRATEGY(bmp->devvp, b); 778 } 779 780 int 781 sysvbfs_print(void *v) 782 { 783 struct vop_print_args /* { 784 struct vnode *a_vp; 785 } */ *ap = v; 786 struct sysvbfs_node *bnode = ap->a_vp->v_data; 787 788 DPRINTF("%s:\n", __func__); 789 bfs_dump(bnode->bmp->bfs); 790 791 return 0; 792 } 793 794 int 795 sysvbfs_advlock(void *v) 796 { 797 struct vop_advlock_args /* { 798 struct vnode *a_vp; 799 void *a_id; 800 int a_op; 801 struct flock *a_fl; 802 int a_flags; 803 } */ *ap = v; 804 struct sysvbfs_node *bnode = ap->a_vp->v_data; 805 806 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 807 808 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 809 } 810 811 int 812 sysvbfs_pathconf(void *v) 813 { 814 struct vop_pathconf_args /* { 815 struct vnode *a_vp; 816 int a_name; 817 register_t *a_retval; 818 } */ *ap = v; 819 int err = 0; 820 821 DPRINTF("%s:\n", __func__); 822 823 switch (ap->a_name) { 824 case _PC_LINK_MAX: 825 *ap->a_retval = 1; 826 break; 827 case _PC_NAME_MAX: 828 *ap->a_retval = BFS_FILENAME_MAXLEN; 829 break; 830 case _PC_PATH_MAX: 831 *ap->a_retval = BFS_FILENAME_MAXLEN; 832 break; 833 case _PC_CHOWN_RESTRICTED: 834 *ap->a_retval = 1; 835 break; 836 case _PC_NO_TRUNC: 837 *ap->a_retval = 0; 838 break; 839 case _PC_SYNC_IO: 840 *ap->a_retval = 1; 841 break; 842 case _PC_FILESIZEBITS: 843 *ap->a_retval = 32; 844 break; 845 default: 846 err = EINVAL; 847 break; 848 } 849 850 return err; 851 } 852 853 int 854 sysvbfs_fsync(void *v) 855 { 856 struct vop_fsync_args /* { 857 struct vnode *a_vp; 858 kauth_cred_t a_cred; 859 int a_flags; 860 off_t offlo; 861 off_t offhi; 862 } */ *ap = v; 863 struct vnode *vp = ap->a_vp; 864 int error, wait; 865 866 if (ap->a_flags & FSYNC_CACHE) { 867 return EOPNOTSUPP; 868 } 869 870 wait = (ap->a_flags & FSYNC_WAIT) != 0; 871 error = vflushbuf(vp, ap->a_flags); 872 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 873 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 874 875 return error; 876 } 877 878 int 879 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 880 const struct timespec *mod, int flags) 881 { 882 struct sysvbfs_node *bnode = vp->v_data; 883 struct bfs_fileattr attr; 884 885 if (vp->v_mount->mnt_flag & MNT_RDONLY) 886 return 0; 887 888 DPRINTF("%s:\n", __func__); 889 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 890 if (bnode->update_atime) { 891 attr.atime = acc ? acc->tv_sec : time_second; 892 bnode->update_atime = false; 893 } 894 if (bnode->update_ctime) { 895 attr.ctime = time_second; 896 bnode->update_ctime = false; 897 } 898 if (bnode->update_mtime) { 899 attr.mtime = mod ? mod->tv_sec : time_second; 900 bnode->update_mtime = false; 901 } 902 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 903 904 return 0; 905 } 906 907 static void 908 sysvbfs_file_setsize(struct vnode *v, size_t size) 909 { 910 struct sysvbfs_node *bnode = v->v_data; 911 struct bfs_inode *inode = bnode->inode; 912 913 bnode->size = size; 914 uvm_vnp_setsize(v, bnode->size); 915 inode->end_sector = bnode->data_block + 916 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 917 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 918 bnode->size - 1; 919 bnode->update_mtime = true; 920 } 921
Indexes created Mon Sep 29 21:09:56 GMT 2025