sysvbfs_vnops.c revision 1.22
1 /* $NetBSD: sysvbfs_vnops.c,v 1.22 2009/06/23 19:36:39 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 1.22 2009/06/23 19:36:39 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 bool islastcn = cnp->cn_flags & ISLASTCN; 82 83 DPRINTF("%s: %s op=%d %d\n", __func__, name, nameiop, 84 cnp->cn_flags); 85 86 KASSERT((cnp->cn_flags & ISDOTDOT) == 0); 87 if ((error = VOP_ACCESS(a->a_dvp, VEXEC, cnp->cn_cred)) != 0) { 88 return error; /* directory permittion. */ 89 } 90 91 92 if (namelen == 1 && name[0] == '.') { /* "." */ 93 VREF(v); 94 *a->a_vpp = v; 95 } else { /* Regular file */ 96 if (!bfs_dirent_lookup_by_name(bfs, cnp->cn_nameptr, 97 &dirent)) { 98 if (nameiop != CREATE && nameiop != RENAME) { 99 DPRINTF("%s: no such a file. (1)\n", 100 __func__); 101 return ENOENT; 102 } 103 if ((error = VOP_ACCESS(v, VWRITE, cnp->cn_cred)) != 0) 104 return error; 105 cnp->cn_flags |= SAVENAME; 106 return EJUSTRETURN; 107 } 108 109 /* Allocate v-node */ 110 if ((error = sysvbfs_vget(v->v_mount, dirent->inode, &vpp)) != 0) { 111 DPRINTF("%s: can't get vnode.\n", __func__); 112 return error; 113 } 114 *a->a_vpp = vpp; 115 } 116 117 if (cnp->cn_nameiop != LOOKUP && islastcn) 118 cnp->cn_flags |= SAVENAME; 119 120 return 0; 121 } 122 123 int 124 sysvbfs_create(void *arg) 125 { 126 struct vop_create_args /* { 127 struct vnode *a_dvp; 128 struct vnode **a_vpp; 129 struct componentname *a_cnp; 130 struct vattr *a_vap; 131 } */ *a = arg; 132 struct sysvbfs_node *bnode = a->a_dvp->v_data; 133 struct sysvbfs_mount *bmp = bnode->bmp; 134 struct bfs *bfs = bmp->bfs; 135 struct mount *mp = bmp->mountp; 136 struct bfs_dirent *dirent; 137 struct bfs_fileattr attr; 138 struct vattr *va = a->a_vap; 139 kauth_cred_t cr = a->a_cnp->cn_cred; 140 int err = 0; 141 142 DPRINTF("%s: %s\n", __func__, a->a_cnp->cn_nameptr); 143 KDASSERT(a->a_vap->va_type == VREG); 144 attr.uid = kauth_cred_geteuid(cr); 145 attr.gid = kauth_cred_getegid(cr); 146 attr.mode = va->va_mode; 147 148 if ((err = bfs_file_create(bfs, a->a_cnp->cn_nameptr, 0, 0, &attr)) 149 != 0) { 150 DPRINTF("%s: bfs_file_create failed.\n", __func__); 151 goto unlock_exit; 152 } 153 154 if (!bfs_dirent_lookup_by_name(bfs, a->a_cnp->cn_nameptr, &dirent)) 155 panic("no dirent for created file."); 156 157 if ((err = sysvbfs_vget(mp, dirent->inode, a->a_vpp)) != 0) { 158 DPRINTF("%s: sysvbfs_vget failed.\n", __func__); 159 goto unlock_exit; 160 } 161 bnode = (*a->a_vpp)->v_data; 162 bnode->update_ctime = true; 163 bnode->update_mtime = true; 164 bnode->update_atime = true; 165 166 unlock_exit: 167 /* unlock parent directory */ 168 vput(a->a_dvp); /* locked at sysvbfs_lookup(); */ 169 170 return err; 171 } 172 173 int 174 sysvbfs_open(void *arg) 175 { 176 struct vop_open_args /* { 177 struct vnode *a_vp; 178 int a_mode; 179 kauth_cred_t a_cred; 180 } */ *a = arg; 181 struct vnode *v = a->a_vp; 182 struct sysvbfs_node *bnode = v->v_data; 183 struct bfs_inode *inode = bnode->inode; 184 struct bfs *bfs = bnode->bmp->bfs; 185 struct bfs_dirent *dirent; 186 187 DPRINTF("%s:\n", __func__); 188 KDASSERT(v->v_type == VREG || v->v_type == VDIR); 189 190 if (!bfs_dirent_lookup_by_inode(bfs, inode->number, &dirent)) 191 return ENOENT; 192 bnode->update_atime = true; 193 if ((a->a_mode & FWRITE) && !(a->a_mode & O_APPEND)) { 194 bnode->size = 0; 195 } else { 196 bnode->size = bfs_file_size(inode); 197 } 198 bnode->data_block = inode->start_sector; 199 200 return 0; 201 } 202 203 int 204 sysvbfs_close(void *arg) 205 { 206 struct vop_close_args /* { 207 struct vnodeop_desc *a_desc; 208 struct vnode *a_vp; 209 int a_fflag; 210 kauth_cred_t a_cred; 211 } */ *a = arg; 212 struct vnode *v = a->a_vp; 213 struct sysvbfs_node *bnode = v->v_data; 214 struct bfs_fileattr attr; 215 216 DPRINTF("%s:\n", __func__); 217 uvm_vnp_setsize(v, bnode->size); 218 219 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 220 if (bnode->update_atime) 221 attr.atime = time_second; 222 if (bnode->update_ctime) 223 attr.ctime = time_second; 224 if (bnode->update_mtime) 225 attr.mtime = time_second; 226 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 227 228 VOP_FSYNC(a->a_vp, a->a_cred, FSYNC_WAIT, 0, 0); 229 230 return 0; 231 } 232 233 int 234 sysvbfs_access(void *arg) 235 { 236 struct vop_access_args /* { 237 struct vnode *a_vp; 238 int a_mode; 239 kauth_cred_t a_cred; 240 } */ *ap = arg; 241 struct vnode *vp = ap->a_vp; 242 struct sysvbfs_node *bnode = vp->v_data; 243 struct bfs_fileattr *attr = &bnode->inode->attr; 244 245 DPRINTF("%s:\n", __func__); 246 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 247 return EROFS; 248 249 return genfs_can_access(vp->v_type, attr->mode, attr->uid, attr->gid, 250 ap->a_mode, ap->a_cred); 251 } 252 253 int 254 sysvbfs_getattr(void *v) 255 { 256 struct vop_getattr_args /* { 257 struct vnode *a_vp; 258 struct vattr *a_vap; 259 kauth_cred_t a_cred; 260 } */ *ap = v; 261 struct vnode *vp = ap->a_vp; 262 struct sysvbfs_node *bnode = vp->v_data; 263 struct bfs_inode *inode = bnode->inode; 264 struct bfs_fileattr *attr = &inode->attr; 265 struct sysvbfs_mount *bmp = bnode->bmp; 266 struct vattr *vap = ap->a_vap; 267 268 DPRINTF("%s:\n", __func__); 269 270 vap->va_type = vp->v_type; 271 vap->va_mode = attr->mode; 272 vap->va_nlink = attr->nlink; 273 vap->va_uid = attr->uid; 274 vap->va_gid = attr->gid; 275 vap->va_fsid = bmp->devvp->v_rdev; 276 vap->va_fileid = inode->number; 277 vap->va_size = bfs_file_size(inode); 278 vap->va_blocksize = BFS_BSIZE; 279 vap->va_atime.tv_sec = attr->atime; 280 vap->va_mtime.tv_sec = attr->mtime; 281 vap->va_ctime.tv_sec = attr->ctime; 282 vap->va_birthtime.tv_sec = 0; 283 vap->va_gen = 1; 284 vap->va_flags = 0; 285 vap->va_rdev = 0; /* No device file */ 286 vap->va_bytes = vap->va_size; 287 vap->va_filerev = 0; 288 vap->va_vaflags = 0; 289 290 return 0; 291 } 292 293 int 294 sysvbfs_setattr(void *arg) 295 { 296 struct vop_setattr_args /* { 297 struct vnode *a_vp; 298 struct vattr *a_vap; 299 kauth_cred_t a_cred; 300 struct proc *p; 301 } */ *ap = arg; 302 struct vnode *vp = ap->a_vp; 303 struct vattr *vap = ap->a_vap; 304 struct sysvbfs_node *bnode = vp->v_data; 305 struct bfs_inode *inode = bnode->inode; 306 struct bfs_fileattr *attr = &inode->attr; 307 struct bfs *bfs = bnode->bmp->bfs; 308 309 DPRINTF("%s:\n", __func__); 310 if (vp->v_mount->mnt_flag & MNT_RDONLY) 311 return EROFS; 312 313 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 314 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 315 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 316 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) 317 return EINVAL; 318 319 if (vap->va_uid != (uid_t)VNOVAL) 320 attr->uid = vap->va_uid; 321 if (vap->va_gid != (uid_t)VNOVAL) 322 attr->gid = vap->va_gid; 323 if (vap->va_mode != (mode_t)VNOVAL) 324 attr->mode = vap->va_mode; 325 if (vap->va_atime.tv_sec != VNOVAL) 326 attr->atime = vap->va_atime.tv_sec; 327 if (vap->va_mtime.tv_sec != VNOVAL) 328 attr->mtime = vap->va_mtime.tv_sec; 329 if (vap->va_ctime.tv_sec != VNOVAL) 330 attr->ctime = vap->va_ctime.tv_sec; 331 332 bfs_inode_set_attr(bfs, inode, attr); 333 334 return 0; 335 } 336 337 int 338 sysvbfs_read(void *arg) 339 { 340 struct vop_read_args /* { 341 struct vnode *a_vp; 342 struct uio *a_uio; 343 int a_ioflag; 344 kauth_cred_t a_cred; 345 } */ *a = arg; 346 struct vnode *v = a->a_vp; 347 struct uio *uio = a->a_uio; 348 struct sysvbfs_node *bnode = v->v_data; 349 struct bfs_inode *inode = bnode->inode; 350 vsize_t sz, filesz = bfs_file_size(inode); 351 int err; 352 const int advice = IO_ADV_DECODE(a->a_ioflag); 353 354 DPRINTF("%s: type=%d\n", __func__, v->v_type); 355 if (v->v_type != VREG) 356 return EINVAL; 357 358 while (uio->uio_resid > 0) { 359 if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0) 360 break; 361 362 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 363 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(v)); 364 if (err) 365 break; 366 DPRINTF("%s: read %ldbyte\n", __func__, sz); 367 } 368 369 return sysvbfs_update(v, NULL, NULL, UPDATE_WAIT); 370 } 371 372 int 373 sysvbfs_write(void *arg) 374 { 375 struct vop_write_args /* { 376 struct vnode *a_vp; 377 struct uio *a_uio; 378 int a_ioflag; 379 kauth_cred_t a_cred; 380 } */ *a = arg; 381 struct vnode *v = a->a_vp; 382 struct uio *uio = a->a_uio; 383 int advice = IO_ADV_DECODE(a->a_ioflag); 384 struct sysvbfs_node *bnode = v->v_data; 385 struct bfs_inode *inode = bnode->inode; 386 bool extended = false; 387 vsize_t sz; 388 int err = 0; 389 390 if (a->a_vp->v_type != VREG) 391 return EISDIR; 392 393 if (a->a_ioflag & IO_APPEND) 394 uio->uio_offset = bnode->size; 395 396 if (uio->uio_resid == 0) 397 return 0; 398 399 if (bnode->size < uio->uio_offset + uio->uio_resid) { 400 bnode->size = uio->uio_offset + uio->uio_resid; 401 uvm_vnp_setsize(v, bnode->size); 402 extended = true; 403 } 404 405 while (uio->uio_resid > 0) { 406 sz = uio->uio_resid; 407 err = ubc_uiomove(&v->v_uobj, uio, sz, advice, 408 UBC_WRITE | UBC_UNMAP_FLAG(v)); 409 if (err) 410 break; 411 DPRINTF("%s: write %ldbyte\n", __func__, sz); 412 } 413 inode->end_sector = bnode->data_block + 414 (ROUND_SECTOR(bnode->size) >> DEV_BSHIFT) - 1; 415 inode->eof_offset_byte = bnode->data_block * DEV_BSIZE + 416 bnode->size - 1; 417 bnode->update_mtime = true; 418 419 VN_KNOTE(v, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 420 421 return err; 422 } 423 424 int 425 sysvbfs_remove(void *arg) 426 { 427 struct vop_remove_args /* { 428 struct vnodeop_desc *a_desc; 429 struct vnode * a_dvp; 430 struct vnode * a_vp; 431 struct componentname * a_cnp; 432 } */ *ap = arg; 433 struct vnode *vp = ap->a_vp; 434 struct vnode *dvp = ap->a_dvp; 435 struct sysvbfs_node *bnode = vp->v_data; 436 struct sysvbfs_mount *bmp = bnode->bmp; 437 struct bfs *bfs = bmp->bfs; 438 int err; 439 440 DPRINTF("%s: delete %s\n", __func__, ap->a_cnp->cn_nameptr); 441 442 if (vp->v_type == VDIR) 443 return EPERM; 444 445 if ((err = bfs_file_delete(bfs, ap->a_cnp->cn_nameptr)) != 0) 446 DPRINTF("%s: bfs_file_delete failed.\n", __func__); 447 448 VN_KNOTE(ap->a_vp, NOTE_DELETE); 449 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 450 if (dvp == vp) 451 vrele(vp); 452 else 453 vput(vp); 454 vput(dvp); 455 456 return err; 457 } 458 459 int 460 sysvbfs_rename(void *arg) 461 { 462 struct vop_rename_args /* { 463 struct vnode *a_fdvp; from parent-directory v-node 464 struct vnode *a_fvp; from file v-node 465 struct componentname *a_fcnp; 466 struct vnode *a_tdvp; to parent-directory 467 struct vnode *a_tvp; to file v-node 468 struct componentname *a_tcnp; 469 } */ *ap = arg; 470 struct vnode *fvp = ap->a_fvp; 471 struct vnode *tvp = ap->a_tvp; 472 struct sysvbfs_node *bnode = fvp->v_data; 473 struct bfs *bfs = bnode->bmp->bfs; 474 const char *from_name = ap->a_fcnp->cn_nameptr; 475 const char *to_name = ap->a_tcnp->cn_nameptr; 476 int error; 477 478 DPRINTF("%s: %s->%s\n", __func__, from_name, to_name); 479 if ((fvp->v_mount != ap->a_tdvp->v_mount) || 480 (tvp && (fvp->v_mount != tvp->v_mount))) { 481 error = EXDEV; 482 printf("cross-device link\n"); 483 goto out; 484 } 485 486 KDASSERT(fvp->v_type == VREG); 487 KDASSERT(tvp == NULL ? true : tvp->v_type == VREG); 488 489 error = bfs_file_rename(bfs, from_name, to_name); 490 out: 491 vput(ap->a_tdvp); 492 if (tvp) 493 vput(ap->a_tvp); /* locked on entry */ 494 if (ap->a_tdvp != ap->a_fdvp) 495 vrele(ap->a_fdvp); 496 vrele(ap->a_fvp); /* unlocked and refcnt is incremented on entry. */ 497 498 return 0; 499 } 500 501 int 502 sysvbfs_readdir(void *v) 503 { 504 struct vop_readdir_args /* { 505 struct vnode *a_vp; 506 struct uio *a_uio; 507 kauth_cred_t a_cred; 508 int *a_eofflag; 509 off_t **a_cookies; 510 int *a_ncookies; 511 } */ *ap = v; 512 struct uio *uio = ap->a_uio; 513 struct vnode *vp = ap->a_vp; 514 struct sysvbfs_node *bnode = vp->v_data; 515 struct bfs *bfs = bnode->bmp->bfs; 516 struct dirent *dp; 517 struct bfs_dirent *file; 518 int i, n, error; 519 520 DPRINTF("%s: offset=%lld residue=%d\n", __func__, 521 uio->uio_offset, uio->uio_resid); 522 523 KDASSERT(vp->v_type == VDIR); 524 KDASSERT(uio->uio_offset >= 0); 525 526 dp = malloc(sizeof(struct dirent), M_BFS, M_WAITOK | M_ZERO); 527 528 i = uio->uio_offset / sizeof(struct dirent); 529 n = uio->uio_resid / sizeof(struct dirent); 530 if ((i + n) > bfs->n_dirent) 531 n = bfs->n_dirent - i; 532 533 for (file = &bfs->dirent[i]; i < n; file++) { 534 if (file->inode == 0) 535 continue; 536 if (i == bfs->max_dirent) { 537 DPRINTF("%s: file system inconsistent.\n", 538 __func__); 539 break; 540 } 541 i++; 542 memset(dp, 0, sizeof(struct dirent)); 543 dp->d_fileno = file->inode; 544 dp->d_type = file->inode == BFS_ROOT_INODE ? DT_DIR : DT_REG; 545 dp->d_namlen = strlen(file->name); 546 strncpy(dp->d_name, file->name, BFS_FILENAME_MAXLEN); 547 dp->d_reclen = sizeof(struct dirent); 548 if ((error = uiomove(dp, dp->d_reclen, uio)) != 0) { 549 DPRINTF("%s: uiomove failed.\n", __func__); 550 free(dp, M_BFS); 551 return error; 552 } 553 } 554 DPRINTF("%s: %d %d %d\n", __func__, i, n, bfs->n_dirent); 555 *ap->a_eofflag = (i == bfs->n_dirent); 556 557 free(dp, M_BFS); 558 return 0; 559 } 560 561 int 562 sysvbfs_inactive(void *arg) 563 { 564 struct vop_inactive_args /* { 565 struct vnode *a_vp; 566 bool *a_recycle; 567 } */ *a = arg; 568 struct vnode *v = a->a_vp; 569 570 DPRINTF("%s:\n", __func__); 571 *a->a_recycle = true; 572 VOP_UNLOCK(v, 0); 573 574 return 0; 575 } 576 577 int 578 sysvbfs_reclaim(void *v) 579 { 580 extern struct pool sysvbfs_node_pool; 581 struct vop_reclaim_args /* { 582 struct vnode *a_vp; 583 } */ *ap = v; 584 struct vnode *vp = ap->a_vp; 585 struct sysvbfs_node *bnode = vp->v_data; 586 587 DPRINTF("%s:\n", __func__); 588 mutex_enter(&mntvnode_lock); 589 LIST_REMOVE(bnode, link); 590 mutex_exit(&mntvnode_lock); 591 cache_purge(vp); 592 genfs_node_destroy(vp); 593 pool_put(&sysvbfs_node_pool, bnode); 594 vp->v_data = NULL; 595 596 return 0; 597 } 598 599 int 600 sysvbfs_bmap(void *arg) 601 { 602 struct vop_bmap_args /* { 603 struct vnode *a_vp; 604 daddr_t a_bn; 605 struct vnode **a_vpp; 606 daddr_t *a_bnp; 607 int *a_runp; 608 } */ *a = arg; 609 struct vnode *v = a->a_vp; 610 struct sysvbfs_node *bnode = v->v_data; 611 struct sysvbfs_mount *bmp = bnode->bmp; 612 struct bfs_inode *inode = bnode->inode; 613 daddr_t blk; 614 615 DPRINTF("%s:\n", __func__); 616 /* BFS algorithm is contiguous allocation */ 617 blk = inode->start_sector + a->a_bn; 618 619 if (blk * BFS_BSIZE > bmp->bfs->data_end) 620 return ENOSPC; 621 622 *a->a_vpp = bmp->devvp; 623 *a->a_runp = 0; 624 DPRINTF("%s: %d + %lld\n", __func__, inode->start_sector, a->a_bn); 625 626 *a->a_bnp = blk; 627 628 629 return 0; 630 } 631 632 int 633 sysvbfs_strategy(void *arg) 634 { 635 struct vop_strategy_args /* { 636 struct vnode *a_vp; 637 struct buf *a_bp; 638 } */ *a = arg; 639 struct buf *b = a->a_bp; 640 struct vnode *v = a->a_vp; 641 struct sysvbfs_node *bnode = v->v_data; 642 struct sysvbfs_mount *bmp = bnode->bmp; 643 int error; 644 645 DPRINTF("%s:\n", __func__); 646 KDASSERT(v->v_type == VREG); 647 if (b->b_blkno == b->b_lblkno) { 648 error = VOP_BMAP(v, b->b_lblkno, NULL, &b->b_blkno, NULL); 649 if (error) { 650 b->b_error = error; 651 biodone(b); 652 return error; 653 } 654 if ((long)b->b_blkno == -1) 655 clrbuf(b); 656 } 657 if ((long)b->b_blkno == -1) { 658 biodone(b); 659 return 0; 660 } 661 662 return VOP_STRATEGY(bmp->devvp, b); 663 } 664 665 int 666 sysvbfs_print(void *v) 667 { 668 struct vop_print_args /* { 669 struct vnode *a_vp; 670 } */ *ap = v; 671 struct sysvbfs_node *bnode = ap->a_vp->v_data; 672 673 DPRINTF("%s:\n", __func__); 674 bfs_dump(bnode->bmp->bfs); 675 676 return 0; 677 } 678 679 int 680 sysvbfs_advlock(void *v) 681 { 682 struct vop_advlock_args /* { 683 struct vnode *a_vp; 684 void *a_id; 685 int a_op; 686 struct flock *a_fl; 687 int a_flags; 688 } */ *ap = v; 689 struct sysvbfs_node *bnode = ap->a_vp->v_data; 690 691 DPRINTF("%s: op=%d\n", __func__, ap->a_op); 692 693 return lf_advlock(ap, &bnode->lockf, bfs_file_size(bnode->inode)); 694 } 695 696 int 697 sysvbfs_pathconf(void *v) 698 { 699 struct vop_pathconf_args /* { 700 struct vnode *a_vp; 701 int a_name; 702 register_t *a_retval; 703 } */ *ap = v; 704 int err = 0; 705 706 DPRINTF("%s:\n", __func__); 707 708 switch (ap->a_name) { 709 case _PC_LINK_MAX: 710 *ap->a_retval = 1; 711 break;; 712 case _PC_NAME_MAX: 713 *ap->a_retval = BFS_FILENAME_MAXLEN; 714 break;; 715 case _PC_PATH_MAX: 716 *ap->a_retval = BFS_FILENAME_MAXLEN; 717 break;; 718 case _PC_CHOWN_RESTRICTED: 719 *ap->a_retval = 1; 720 break;; 721 case _PC_NO_TRUNC: 722 *ap->a_retval = 0; 723 break;; 724 case _PC_SYNC_IO: 725 *ap->a_retval = 1; 726 break;; 727 case _PC_FILESIZEBITS: 728 *ap->a_retval = 32; 729 break;; 730 default: 731 err = EINVAL; 732 break; 733 } 734 735 return err; 736 } 737 738 int 739 sysvbfs_fsync(void *v) 740 { 741 struct vop_fsync_args /* { 742 struct vnode *a_vp; 743 kauth_cred_t a_cred; 744 int a_flags; 745 off_t offlo; 746 off_t offhi; 747 } */ *ap = v; 748 struct vnode *vp = ap->a_vp; 749 int error, wait; 750 751 if (ap->a_flags & FSYNC_CACHE) { 752 return EOPNOTSUPP; 753 } 754 755 wait = (ap->a_flags & FSYNC_WAIT) != 0; 756 vflushbuf(vp, wait); 757 758 if ((ap->a_flags & FSYNC_DATAONLY) != 0) 759 error = 0; 760 else 761 error = sysvbfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 762 763 return error; 764 } 765 766 int 767 sysvbfs_update(struct vnode *vp, const struct timespec *acc, 768 const struct timespec *mod, int flags) 769 { 770 struct sysvbfs_node *bnode = vp->v_data; 771 struct bfs_fileattr attr; 772 773 DPRINTF("%s:\n", __func__); 774 memset(&attr, 0xff, sizeof attr); /* Set VNOVAL all */ 775 if (bnode->update_atime) { 776 attr.atime = acc ? acc->tv_sec : time_second; 777 bnode->update_atime = false; 778 } 779 if (bnode->update_ctime) { 780 attr.ctime = time_second; 781 bnode->update_ctime = false; 782 } 783 if (bnode->update_mtime) { 784 attr.mtime = mod ? mod->tv_sec : time_second; 785 bnode->update_mtime = false; 786 } 787 bfs_inode_set_attr(bnode->bmp->bfs, bnode->inode, &attr); 788 789 return 0; 790 } 791
Indexes created Mon Sep 29 21:09:56 GMT 2025