ffs_vfsops.c revision 1.257.2.6
1 /* $NetBSD: ffs_vfsops.c,v 1.257.2.6 2010/05/28 09:14:55 uebayasi Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wasabi Systems, Inc, and by Andrew Doran. 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 /* 33 * Copyright (c) 1989, 1991, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: ffs_vfsops.c,v 1.257.2.6 2010/05/28 09:14:55 uebayasi Exp $"); 65 66 #if defined(_KERNEL_OPT) 67 #include "opt_ffs.h" 68 #include "opt_quota.h" 69 #include "opt_wapbl.h" 70 #include "opt_xip.h" 71 #endif 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/namei.h> 76 #include <sys/proc.h> 77 #include <sys/kernel.h> 78 #include <sys/vnode.h> 79 #include <sys/socket.h> 80 #include <sys/mount.h> 81 #include <sys/buf.h> 82 #include <sys/device.h> 83 #include <sys/mbuf.h> 84 #include <sys/file.h> 85 #include <sys/disklabel.h> 86 #include <sys/ioctl.h> 87 #include <sys/errno.h> 88 #include <sys/malloc.h> 89 #include <sys/pool.h> 90 #include <sys/lock.h> 91 #include <sys/sysctl.h> 92 #include <sys/conf.h> 93 #include <sys/kauth.h> 94 #include <sys/wapbl.h> 95 #include <sys/fstrans.h> 96 #include <sys/module.h> 97 98 #include <miscfs/genfs/genfs.h> 99 #include <miscfs/specfs/specdev.h> 100 101 #include <ufs/ufs/quota.h> 102 #include <ufs/ufs/ufsmount.h> 103 #include <ufs/ufs/inode.h> 104 #include <ufs/ufs/dir.h> 105 #include <ufs/ufs/ufs_extern.h> 106 #include <ufs/ufs/ufs_bswap.h> 107 #include <ufs/ufs/ufs_wapbl.h> 108 109 #include <ufs/ffs/fs.h> 110 #include <ufs/ffs/ffs_extern.h> 111 112 MODULE(MODULE_CLASS_VFS, ffs, NULL); 113 114 static int ffs_vfs_fsync(vnode_t *, int); 115 116 static struct sysctllog *ffs_sysctl_log; 117 118 /* how many times ffs_init() was called */ 119 int ffs_initcount = 0; 120 121 extern const struct vnodeopv_desc ffs_vnodeop_opv_desc; 122 extern const struct vnodeopv_desc ffs_specop_opv_desc; 123 extern const struct vnodeopv_desc ffs_fifoop_opv_desc; 124 125 const struct vnodeopv_desc * const ffs_vnodeopv_descs[] = { 126 &ffs_vnodeop_opv_desc, 127 &ffs_specop_opv_desc, 128 &ffs_fifoop_opv_desc, 129 NULL, 130 }; 131 132 struct vfsops ffs_vfsops = { 133 MOUNT_FFS, 134 sizeof (struct ufs_args), 135 ffs_mount, 136 ufs_start, 137 ffs_unmount, 138 ufs_root, 139 ufs_quotactl, 140 ffs_statvfs, 141 ffs_sync, 142 ffs_vget, 143 ffs_fhtovp, 144 ffs_vptofh, 145 ffs_init, 146 ffs_reinit, 147 ffs_done, 148 ffs_mountroot, 149 ffs_snapshot, 150 ffs_extattrctl, 151 ffs_suspendctl, 152 genfs_renamelock_enter, 153 genfs_renamelock_exit, 154 ffs_vfs_fsync, 155 ffs_vnodeopv_descs, 156 0, 157 { NULL, NULL }, 158 }; 159 160 static const struct genfs_ops ffs_genfsops = { 161 .gop_size = ffs_gop_size, 162 .gop_alloc = ufs_gop_alloc, 163 .gop_write = genfs_gop_write, 164 .gop_markupdate = ufs_gop_markupdate, 165 }; 166 167 static const struct ufs_ops ffs_ufsops = { 168 .uo_itimes = ffs_itimes, 169 .uo_update = ffs_update, 170 .uo_truncate = ffs_truncate, 171 .uo_valloc = ffs_valloc, 172 .uo_vfree = ffs_vfree, 173 .uo_balloc = ffs_balloc, 174 .uo_unmark_vnode = (void (*)(vnode_t *))nullop, 175 }; 176 177 static int 178 ffs_modcmd(modcmd_t cmd, void *arg) 179 { 180 int error; 181 182 #if 0 183 extern int doasyncfree; 184 #endif 185 extern int ffs_log_changeopt; 186 187 switch (cmd) { 188 case MODULE_CMD_INIT: 189 error = vfs_attach(&ffs_vfsops); 190 if (error != 0) 191 break; 192 193 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 194 CTLFLAG_PERMANENT, 195 CTLTYPE_NODE, "vfs", NULL, 196 NULL, 0, NULL, 0, 197 CTL_VFS, CTL_EOL); 198 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 199 CTLFLAG_PERMANENT, 200 CTLTYPE_NODE, "ffs", 201 SYSCTL_DESCR("Berkeley Fast File System"), 202 NULL, 0, NULL, 0, 203 CTL_VFS, 1, CTL_EOL); 204 205 /* 206 * @@@ should we even bother with these first three? 207 */ 208 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 209 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 210 CTLTYPE_INT, "doclusterread", NULL, 211 sysctl_notavail, 0, NULL, 0, 212 CTL_VFS, 1, FFS_CLUSTERREAD, CTL_EOL); 213 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 215 CTLTYPE_INT, "doclusterwrite", NULL, 216 sysctl_notavail, 0, NULL, 0, 217 CTL_VFS, 1, FFS_CLUSTERWRITE, CTL_EOL); 218 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 219 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 220 CTLTYPE_INT, "doreallocblks", NULL, 221 sysctl_notavail, 0, NULL, 0, 222 CTL_VFS, 1, FFS_REALLOCBLKS, CTL_EOL); 223 #if 0 224 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 226 CTLTYPE_INT, "doasyncfree", 227 SYSCTL_DESCR("Release dirty blocks asynchronously"), 228 NULL, 0, &doasyncfree, 0, 229 CTL_VFS, 1, FFS_ASYNCFREE, CTL_EOL); 230 #endif 231 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 232 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 233 CTLTYPE_INT, "log_changeopt", 234 SYSCTL_DESCR("Log changes in optimization strategy"), 235 NULL, 0, &ffs_log_changeopt, 0, 236 CTL_VFS, 1, FFS_LOG_CHANGEOPT, CTL_EOL); 237 break; 238 case MODULE_CMD_FINI: 239 error = vfs_detach(&ffs_vfsops); 240 if (error != 0) 241 break; 242 sysctl_teardown(&ffs_sysctl_log); 243 break; 244 default: 245 error = ENOTTY; 246 break; 247 } 248 249 return (error); 250 } 251 252 pool_cache_t ffs_inode_cache; 253 pool_cache_t ffs_dinode1_cache; 254 pool_cache_t ffs_dinode2_cache; 255 256 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, daddr_t); 257 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 258 259 /* 260 * Called by main() when ffs is going to be mounted as root. 261 */ 262 263 int 264 ffs_mountroot(void) 265 { 266 struct fs *fs; 267 struct mount *mp; 268 struct lwp *l = curlwp; /* XXX */ 269 struct ufsmount *ump; 270 int error; 271 272 if (device_class(root_device) != DV_DISK) 273 return (ENODEV); 274 275 if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) { 276 vrele(rootvp); 277 return (error); 278 } 279 280 /* 281 * We always need to be able to mount the root file system. 282 */ 283 mp->mnt_flag |= MNT_FORCE; 284 if ((error = ffs_mountfs(rootvp, mp, l)) != 0) { 285 vfs_unbusy(mp, false, NULL); 286 vfs_destroy(mp); 287 return (error); 288 } 289 mp->mnt_flag &= ~MNT_FORCE; 290 mutex_enter(&mountlist_lock); 291 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 292 mutex_exit(&mountlist_lock); 293 ump = VFSTOUFS(mp); 294 fs = ump->um_fs; 295 memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt)); 296 (void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0); 297 (void)ffs_statvfs(mp, &mp->mnt_stat); 298 vfs_unbusy(mp, false, NULL); 299 setrootfstime((time_t)fs->fs_time); 300 return (0); 301 } 302 303 /* 304 * VFS Operations. 305 * 306 * mount system call 307 */ 308 int 309 ffs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 310 { 311 struct lwp *l = curlwp; 312 struct vnode *devvp = NULL; 313 struct ufs_args *args = data; 314 struct ufsmount *ump = NULL; 315 struct fs *fs; 316 int error = 0, flags, update; 317 mode_t accessmode; 318 319 if (*data_len < sizeof *args) 320 return EINVAL; 321 322 if (mp->mnt_flag & MNT_GETARGS) { 323 ump = VFSTOUFS(mp); 324 if (ump == NULL) 325 return EIO; 326 args->fspec = NULL; 327 *data_len = sizeof *args; 328 return 0; 329 } 330 331 update = mp->mnt_flag & MNT_UPDATE; 332 333 /* Check arguments */ 334 if (args->fspec != NULL) { 335 /* 336 * Look up the name and verify that it's sane. 337 */ 338 error = namei_simple_user(args->fspec, 339 NSM_FOLLOW_NOEMULROOT, &devvp); 340 if (error != 0) 341 return (error); 342 343 if (!update) { 344 /* 345 * Be sure this is a valid block device 346 */ 347 if (devvp->v_type != VBLK) 348 error = ENOTBLK; 349 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 350 error = ENXIO; 351 } else { 352 /* 353 * Be sure we're still naming the same device 354 * used for our initial mount 355 */ 356 ump = VFSTOUFS(mp); 357 if (devvp != ump->um_devvp) { 358 if (devvp->v_rdev != ump->um_devvp->v_rdev) 359 error = EINVAL; 360 else { 361 vrele(devvp); 362 devvp = ump->um_devvp; 363 vref(devvp); 364 } 365 } 366 } 367 } else { 368 if (!update) { 369 /* New mounts must have a filename for the device */ 370 return (EINVAL); 371 } else { 372 /* Use the extant mount */ 373 ump = VFSTOUFS(mp); 374 devvp = ump->um_devvp; 375 vref(devvp); 376 } 377 } 378 379 /* 380 * If mount by non-root, then verify that user has necessary 381 * permissions on the device. 382 * 383 * Permission to update a mount is checked higher, so here we presume 384 * updating the mount is okay (for example, as far as securelevel goes) 385 * which leaves us with the normal check. 386 */ 387 if (error == 0) { 388 accessmode = VREAD; 389 if (update ? 390 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 391 (mp->mnt_flag & MNT_RDONLY) == 0) 392 accessmode |= VWRITE; 393 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 394 error = genfs_can_mount(devvp, accessmode, l->l_cred); 395 VOP_UNLOCK(devvp, 0); 396 } 397 398 if (error) { 399 vrele(devvp); 400 return (error); 401 } 402 403 #ifdef WAPBL 404 /* WAPBL can only be enabled on a r/w mount. */ 405 if ((mp->mnt_flag & MNT_RDONLY) && !(mp->mnt_iflag & IMNT_WANTRDWR)) { 406 mp->mnt_flag &= ~MNT_LOG; 407 } 408 #else /* !WAPBL */ 409 mp->mnt_flag &= ~MNT_LOG; 410 #endif /* !WAPBL */ 411 412 if (!update) { 413 int xflags; 414 415 if (mp->mnt_flag & MNT_RDONLY) 416 xflags = FREAD; 417 else 418 xflags = FREAD | FWRITE; 419 error = VOP_OPEN(devvp, xflags, FSCRED); 420 if (error) 421 goto fail; 422 error = ffs_mountfs(devvp, mp, l); 423 if (error) { 424 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 425 (void)VOP_CLOSE(devvp, xflags, NOCRED); 426 VOP_UNLOCK(devvp, 0); 427 goto fail; 428 } 429 430 ump = VFSTOUFS(mp); 431 fs = ump->um_fs; 432 } else { 433 /* 434 * Update the mount. 435 */ 436 437 /* 438 * The initial mount got a reference on this 439 * device, so drop the one obtained via 440 * namei(), above. 441 */ 442 vrele(devvp); 443 444 ump = VFSTOUFS(mp); 445 fs = ump->um_fs; 446 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 447 /* 448 * Changing from r/w to r/o 449 */ 450 flags = WRITECLOSE; 451 if (mp->mnt_flag & MNT_FORCE) 452 flags |= FORCECLOSE; 453 error = ffs_flushfiles(mp, flags, l); 454 if (error == 0) 455 error = UFS_WAPBL_BEGIN(mp); 456 if (error == 0 && 457 ffs_cgupdate(ump, MNT_WAIT) == 0 && 458 fs->fs_clean & FS_WASCLEAN) { 459 if (mp->mnt_flag & MNT_SOFTDEP) 460 fs->fs_flags &= ~FS_DOSOFTDEP; 461 fs->fs_clean = FS_ISCLEAN; 462 (void) ffs_sbupdate(ump, MNT_WAIT); 463 } 464 if (error == 0) 465 UFS_WAPBL_END(mp); 466 if (error) 467 return (error); 468 } 469 470 #ifdef WAPBL 471 if ((mp->mnt_flag & MNT_LOG) == 0) { 472 error = ffs_wapbl_stop(mp, mp->mnt_flag & MNT_FORCE); 473 if (error) 474 return error; 475 } 476 #endif /* WAPBL */ 477 478 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 479 /* 480 * Finish change from r/w to r/o 481 */ 482 fs->fs_ronly = 1; 483 fs->fs_fmod = 0; 484 } 485 486 if (mp->mnt_flag & MNT_RELOAD) { 487 error = ffs_reload(mp, l->l_cred, l); 488 if (error) 489 return (error); 490 } 491 492 if (fs->fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 493 /* 494 * Changing from read-only to read/write 495 */ 496 fs->fs_ronly = 0; 497 fs->fs_clean <<= 1; 498 fs->fs_fmod = 1; 499 #ifdef WAPBL 500 if (fs->fs_flags & FS_DOWAPBL) { 501 printf("%s: replaying log to disk\n", 502 fs->fs_fsmnt); 503 KDASSERT(mp->mnt_wapbl_replay); 504 error = wapbl_replay_write(mp->mnt_wapbl_replay, 505 devvp); 506 if (error) { 507 return error; 508 } 509 wapbl_replay_stop(mp->mnt_wapbl_replay); 510 fs->fs_clean = FS_WASCLEAN; 511 } 512 #endif /* WAPBL */ 513 if (fs->fs_snapinum[0] != 0) 514 ffs_snapshot_mount(mp); 515 } 516 517 #ifdef WAPBL 518 error = ffs_wapbl_start(mp); 519 if (error) 520 return error; 521 #endif /* WAPBL */ 522 523 if (args->fspec == NULL) 524 return 0; 525 } 526 527 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 528 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 529 if (error == 0) 530 (void)strncpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, 531 sizeof(fs->fs_fsmnt)); 532 fs->fs_flags &= ~FS_DOSOFTDEP; 533 if (fs->fs_fmod != 0) { /* XXX */ 534 int err; 535 536 fs->fs_fmod = 0; 537 if (fs->fs_clean & FS_WASCLEAN) 538 fs->fs_time = time_second; 539 else { 540 printf("%s: file system not clean (fs_clean=%#x); " 541 "please fsck(8)\n", mp->mnt_stat.f_mntfromname, 542 fs->fs_clean); 543 printf("%s: lost blocks %" PRId64 " files %d\n", 544 mp->mnt_stat.f_mntfromname, fs->fs_pendingblocks, 545 fs->fs_pendinginodes); 546 } 547 err = UFS_WAPBL_BEGIN(mp); 548 if (err == 0) { 549 (void) ffs_cgupdate(ump, MNT_WAIT); 550 UFS_WAPBL_END(mp); 551 } 552 } 553 if ((mp->mnt_flag & MNT_SOFTDEP) != 0) { 554 printf("%s: `-o softdep' is no longer supported, " 555 "consider `-o log'\n", mp->mnt_stat.f_mntfromname); 556 mp->mnt_flag &= ~MNT_SOFTDEP; 557 } 558 559 return (error); 560 561 fail: 562 vrele(devvp); 563 return (error); 564 } 565 566 /* 567 * Reload all incore data for a filesystem (used after running fsck on 568 * the root filesystem and finding things to fix). The filesystem must 569 * be mounted read-only. 570 * 571 * Things to do to update the mount: 572 * 1) invalidate all cached meta-data. 573 * 2) re-read superblock from disk. 574 * 3) re-read summary information from disk. 575 * 4) invalidate all inactive vnodes. 576 * 5) invalidate all cached file data. 577 * 6) re-read inode data for all active vnodes. 578 */ 579 int 580 ffs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l) 581 { 582 struct vnode *vp, *mvp, *devvp; 583 struct inode *ip; 584 void *space; 585 struct buf *bp; 586 struct fs *fs, *newfs; 587 struct partinfo dpart; 588 int i, bsize, blks, error; 589 int32_t *lp; 590 struct ufsmount *ump; 591 daddr_t sblockloc; 592 593 if ((mp->mnt_flag & MNT_RDONLY) == 0) 594 return (EINVAL); 595 596 ump = VFSTOUFS(mp); 597 /* 598 * Step 1: invalidate all cached meta-data. 599 */ 600 devvp = ump->um_devvp; 601 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 602 error = vinvalbuf(devvp, 0, cred, l, 0, 0); 603 VOP_UNLOCK(devvp, 0); 604 if (error) 605 panic("ffs_reload: dirty1"); 606 /* 607 * Step 2: re-read superblock from disk. 608 */ 609 fs = ump->um_fs; 610 611 /* XXX we don't handle possibility that superblock moved. */ 612 error = bread(devvp, fs->fs_sblockloc / DEV_BSIZE, fs->fs_sbsize, 613 NOCRED, 0, &bp); 614 if (error) { 615 brelse(bp, 0); 616 return (error); 617 } 618 newfs = malloc(fs->fs_sbsize, M_UFSMNT, M_WAITOK); 619 memcpy(newfs, bp->b_data, fs->fs_sbsize); 620 #ifdef FFS_EI 621 if (ump->um_flags & UFS_NEEDSWAP) { 622 ffs_sb_swap((struct fs*)bp->b_data, newfs); 623 fs->fs_flags |= FS_SWAPPED; 624 } else 625 #endif 626 fs->fs_flags &= ~FS_SWAPPED; 627 if ((newfs->fs_magic != FS_UFS1_MAGIC && 628 newfs->fs_magic != FS_UFS2_MAGIC)|| 629 newfs->fs_bsize > MAXBSIZE || 630 newfs->fs_bsize < sizeof(struct fs)) { 631 brelse(bp, 0); 632 free(newfs, M_UFSMNT); 633 return (EIO); /* XXX needs translation */ 634 } 635 /* Store off old fs_sblockloc for fs_oldfscompat_read. */ 636 sblockloc = fs->fs_sblockloc; 637 /* 638 * Copy pointer fields back into superblock before copying in XXX 639 * new superblock. These should really be in the ufsmount. XXX 640 * Note that important parameters (eg fs_ncg) are unchanged. 641 */ 642 newfs->fs_csp = fs->fs_csp; 643 newfs->fs_maxcluster = fs->fs_maxcluster; 644 newfs->fs_contigdirs = fs->fs_contigdirs; 645 newfs->fs_ronly = fs->fs_ronly; 646 newfs->fs_active = fs->fs_active; 647 memcpy(fs, newfs, (u_int)fs->fs_sbsize); 648 brelse(bp, 0); 649 free(newfs, M_UFSMNT); 650 651 /* Recheck for apple UFS filesystem */ 652 ump->um_flags &= ~UFS_ISAPPLEUFS; 653 /* First check to see if this is tagged as an Apple UFS filesystem 654 * in the disklabel 655 */ 656 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred) == 0) && 657 (dpart.part->p_fstype == FS_APPLEUFS)) { 658 ump->um_flags |= UFS_ISAPPLEUFS; 659 } 660 #ifdef APPLE_UFS 661 else { 662 /* Manually look for an apple ufs label, and if a valid one 663 * is found, then treat it like an Apple UFS filesystem anyway 664 */ 665 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE), 666 APPLEUFS_LABEL_SIZE, cred, 0, &bp); 667 if (error) { 668 brelse(bp, 0); 669 return (error); 670 } 671 error = ffs_appleufs_validate(fs->fs_fsmnt, 672 (struct appleufslabel *)bp->b_data, NULL); 673 if (error == 0) 674 ump->um_flags |= UFS_ISAPPLEUFS; 675 brelse(bp, 0); 676 bp = NULL; 677 } 678 #else 679 if (ump->um_flags & UFS_ISAPPLEUFS) 680 return (EIO); 681 #endif 682 683 if (UFS_MPISAPPLEUFS(ump)) { 684 /* see comment about NeXT below */ 685 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 686 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 687 mp->mnt_iflag |= IMNT_DTYPE; 688 } else { 689 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 690 ump->um_dirblksiz = DIRBLKSIZ; 691 if (ump->um_maxsymlinklen > 0) 692 mp->mnt_iflag |= IMNT_DTYPE; 693 else 694 mp->mnt_iflag &= ~IMNT_DTYPE; 695 } 696 ffs_oldfscompat_read(fs, ump, sblockloc); 697 698 mutex_enter(&ump->um_lock); 699 ump->um_maxfilesize = fs->fs_maxfilesize; 700 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) { 701 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n", 702 mp->mnt_stat.f_mntonname, fs->fs_flags, 703 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting"); 704 if ((mp->mnt_flag & MNT_FORCE) == 0) { 705 mutex_exit(&ump->um_lock); 706 return (EINVAL); 707 } 708 } 709 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 710 fs->fs_pendingblocks = 0; 711 fs->fs_pendinginodes = 0; 712 } 713 mutex_exit(&ump->um_lock); 714 715 ffs_statvfs(mp, &mp->mnt_stat); 716 /* 717 * Step 3: re-read summary information from disk. 718 */ 719 blks = howmany(fs->fs_cssize, fs->fs_fsize); 720 space = fs->fs_csp; 721 for (i = 0; i < blks; i += fs->fs_frag) { 722 bsize = fs->fs_bsize; 723 if (i + fs->fs_frag > blks) 724 bsize = (blks - i) * fs->fs_fsize; 725 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize, 726 NOCRED, 0, &bp); 727 if (error) { 728 brelse(bp, 0); 729 return (error); 730 } 731 #ifdef FFS_EI 732 if (UFS_FSNEEDSWAP(fs)) 733 ffs_csum_swap((struct csum *)bp->b_data, 734 (struct csum *)space, bsize); 735 else 736 #endif 737 memcpy(space, bp->b_data, (size_t)bsize); 738 space = (char *)space + bsize; 739 brelse(bp, 0); 740 } 741 if (fs->fs_snapinum[0] != 0) 742 ffs_snapshot_mount(mp); 743 /* 744 * We no longer know anything about clusters per cylinder group. 745 */ 746 if (fs->fs_contigsumsize > 0) { 747 lp = fs->fs_maxcluster; 748 for (i = 0; i < fs->fs_ncg; i++) 749 *lp++ = fs->fs_contigsumsize; 750 } 751 752 /* Allocate a marker vnode. */ 753 if ((mvp = vnalloc(mp)) == NULL) 754 return ENOMEM; 755 /* 756 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 757 * and vclean() can be called indirectly 758 */ 759 mutex_enter(&mntvnode_lock); 760 loop: 761 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 762 vmark(mvp, vp); 763 if (vp->v_mount != mp || vismarker(vp)) 764 continue; 765 /* 766 * Step 4: invalidate all inactive vnodes. 767 */ 768 if (vrecycle(vp, &mntvnode_lock, l)) { 769 mutex_enter(&mntvnode_lock); 770 (void)vunmark(mvp); 771 goto loop; 772 } 773 /* 774 * Step 5: invalidate all cached file data. 775 */ 776 mutex_enter(&vp->v_interlock); 777 mutex_exit(&mntvnode_lock); 778 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) { 779 (void)vunmark(mvp); 780 goto loop; 781 } 782 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 783 panic("ffs_reload: dirty2"); 784 /* 785 * Step 6: re-read inode data for all active vnodes. 786 */ 787 ip = VTOI(vp); 788 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 789 (int)fs->fs_bsize, NOCRED, 0, &bp); 790 if (error) { 791 brelse(bp, 0); 792 vput(vp); 793 (void)vunmark(mvp); 794 break; 795 } 796 ffs_load_inode(bp, ip, fs, ip->i_number); 797 brelse(bp, 0); 798 vput(vp); 799 mutex_enter(&mntvnode_lock); 800 } 801 mutex_exit(&mntvnode_lock); 802 vnfree(mvp); 803 return (error); 804 } 805 806 /* 807 * Possible superblock locations ordered from most to least likely. 808 */ 809 static const int sblock_try[] = SBLOCKSEARCH; 810 811 /* 812 * Common code for mount and mountroot 813 */ 814 int 815 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 816 { 817 struct ufsmount *ump; 818 struct buf *bp; 819 struct fs *fs; 820 dev_t dev; 821 struct partinfo dpart; 822 void *space; 823 daddr_t sblockloc, fsblockloc; 824 int blks, fstype; 825 int error, i, bsize, ronly, bset = 0; 826 #ifdef FFS_EI 827 int needswap = 0; /* keep gcc happy */ 828 #endif 829 int32_t *lp; 830 kauth_cred_t cred; 831 u_int32_t sbsize = 8192; /* keep gcc happy*/ 832 833 dev = devvp->v_rdev; 834 cred = l ? l->l_cred : NOCRED; 835 836 /* Flush out any old buffers remaining from a previous use. */ 837 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 838 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 839 VOP_UNLOCK(devvp, 0); 840 if (error) 841 return (error); 842 843 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 844 845 bp = NULL; 846 ump = NULL; 847 fs = NULL; 848 sblockloc = 0; 849 fstype = 0; 850 851 error = fstrans_mount(mp); 852 if (error) 853 return error; 854 855 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 856 memset(ump, 0, sizeof *ump); 857 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 858 error = ffs_snapshot_init(ump); 859 if (error) 860 goto out; 861 ump->um_ops = &ffs_ufsops; 862 863 #ifdef WAPBL 864 sbagain: 865 #endif 866 /* 867 * Try reading the superblock in each of its possible locations. 868 */ 869 for (i = 0; ; i++) { 870 if (bp != NULL) { 871 brelse(bp, BC_NOCACHE); 872 bp = NULL; 873 } 874 if (sblock_try[i] == -1) { 875 error = EINVAL; 876 fs = NULL; 877 goto out; 878 } 879 error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, cred, 880 0, &bp); 881 if (error) { 882 fs = NULL; 883 goto out; 884 } 885 fs = (struct fs*)bp->b_data; 886 fsblockloc = sblockloc = sblock_try[i]; 887 if (fs->fs_magic == FS_UFS1_MAGIC) { 888 sbsize = fs->fs_sbsize; 889 fstype = UFS1; 890 #ifdef FFS_EI 891 needswap = 0; 892 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC)) { 893 sbsize = bswap32(fs->fs_sbsize); 894 fstype = UFS1; 895 needswap = 1; 896 #endif 897 } else if (fs->fs_magic == FS_UFS2_MAGIC) { 898 sbsize = fs->fs_sbsize; 899 fstype = UFS2; 900 #ifdef FFS_EI 901 needswap = 0; 902 } else if (fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 903 sbsize = bswap32(fs->fs_sbsize); 904 fstype = UFS2; 905 needswap = 1; 906 #endif 907 } else 908 continue; 909 910 911 /* fs->fs_sblockloc isn't defined for old filesystems */ 912 if (fstype == UFS1 && !(fs->fs_old_flags & FS_FLAGS_UPDATED)) { 913 if (sblockloc == SBLOCK_UFS2) 914 /* 915 * This is likely to be the first alternate 916 * in a filesystem with 64k blocks. 917 * Don't use it. 918 */ 919 continue; 920 fsblockloc = sblockloc; 921 } else { 922 fsblockloc = fs->fs_sblockloc; 923 #ifdef FFS_EI 924 if (needswap) 925 fsblockloc = bswap64(fsblockloc); 926 #endif 927 } 928 929 /* Check we haven't found an alternate superblock */ 930 if (fsblockloc != sblockloc) 931 continue; 932 933 /* Validate size of superblock */ 934 if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs)) 935 continue; 936 937 /* Ok seems to be a good superblock */ 938 break; 939 } 940 941 fs = malloc((u_long)sbsize, M_UFSMNT, M_WAITOK); 942 memcpy(fs, bp->b_data, sbsize); 943 ump->um_fs = fs; 944 945 #ifdef FFS_EI 946 if (needswap) { 947 ffs_sb_swap((struct fs*)bp->b_data, fs); 948 fs->fs_flags |= FS_SWAPPED; 949 } else 950 #endif 951 fs->fs_flags &= ~FS_SWAPPED; 952 953 #ifdef WAPBL 954 if ((mp->mnt_wapbl_replay == 0) && (fs->fs_flags & FS_DOWAPBL)) { 955 error = ffs_wapbl_replay_start(mp, fs, devvp); 956 if (error && (mp->mnt_flag & MNT_FORCE) == 0) 957 goto out; 958 if (!error) { 959 if (!ronly) { 960 /* XXX fsmnt may be stale. */ 961 printf("%s: replaying log to disk\n", 962 fs->fs_fsmnt); 963 error = wapbl_replay_write(mp->mnt_wapbl_replay, 964 devvp); 965 if (error) 966 goto out; 967 wapbl_replay_stop(mp->mnt_wapbl_replay); 968 fs->fs_clean = FS_WASCLEAN; 969 } else { 970 /* XXX fsmnt may be stale */ 971 printf("%s: replaying log to memory\n", 972 fs->fs_fsmnt); 973 } 974 975 /* Force a re-read of the superblock */ 976 brelse(bp, BC_INVAL); 977 bp = NULL; 978 free(fs, M_UFSMNT); 979 fs = NULL; 980 goto sbagain; 981 } 982 } 983 #else /* !WAPBL */ 984 if ((fs->fs_flags & FS_DOWAPBL) && (mp->mnt_flag & MNT_FORCE) == 0) { 985 error = EPERM; 986 goto out; 987 } 988 #endif /* !WAPBL */ 989 990 ffs_oldfscompat_read(fs, ump, sblockloc); 991 ump->um_maxfilesize = fs->fs_maxfilesize; 992 993 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) { 994 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n", 995 mp->mnt_stat.f_mntonname, fs->fs_flags, 996 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting"); 997 if ((mp->mnt_flag & MNT_FORCE) == 0) { 998 error = EINVAL; 999 goto out; 1000 } 1001 } 1002 1003 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1004 fs->fs_pendingblocks = 0; 1005 fs->fs_pendinginodes = 0; 1006 } 1007 1008 ump->um_fstype = fstype; 1009 if (fs->fs_sbsize < SBLOCKSIZE) 1010 brelse(bp, BC_INVAL); 1011 else 1012 brelse(bp, 0); 1013 bp = NULL; 1014 1015 /* First check to see if this is tagged as an Apple UFS filesystem 1016 * in the disklabel 1017 */ 1018 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred) == 0) && 1019 (dpart.part->p_fstype == FS_APPLEUFS)) { 1020 ump->um_flags |= UFS_ISAPPLEUFS; 1021 } 1022 #ifdef APPLE_UFS 1023 else { 1024 /* Manually look for an apple ufs label, and if a valid one 1025 * is found, then treat it like an Apple UFS filesystem anyway 1026 */ 1027 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE), 1028 APPLEUFS_LABEL_SIZE, cred, 0, &bp); 1029 if (error) 1030 goto out; 1031 error = ffs_appleufs_validate(fs->fs_fsmnt, 1032 (struct appleufslabel *)bp->b_data, NULL); 1033 if (error == 0) { 1034 ump->um_flags |= UFS_ISAPPLEUFS; 1035 } 1036 brelse(bp, 0); 1037 bp = NULL; 1038 } 1039 #else 1040 if (ump->um_flags & UFS_ISAPPLEUFS) { 1041 error = EINVAL; 1042 goto out; 1043 } 1044 #endif 1045 1046 #if 0 1047 /* 1048 * XXX This code changes the behaviour of mounting dirty filesystems, to 1049 * XXX require "mount -f ..." to mount them. This doesn't match what 1050 * XXX mount(8) describes and is disabled for now. 1051 */ 1052 /* 1053 * If the file system is not clean, don't allow it to be mounted 1054 * unless MNT_FORCE is specified. (Note: MNT_FORCE is always set 1055 * for the root file system.) 1056 */ 1057 if (fs->fs_flags & FS_DOWAPBL) { 1058 /* 1059 * wapbl normally expects to be FS_WASCLEAN when the FS_DOWAPBL 1060 * bit is set, although there's a window in unmount where it 1061 * could be FS_ISCLEAN 1062 */ 1063 if ((mp->mnt_flag & MNT_FORCE) == 0 && 1064 (fs->fs_clean & (FS_WASCLEAN | FS_ISCLEAN)) == 0) { 1065 error = EPERM; 1066 goto out; 1067 } 1068 } else 1069 if ((fs->fs_clean & FS_ISCLEAN) == 0 && 1070 (mp->mnt_flag & MNT_FORCE) == 0) { 1071 error = EPERM; 1072 goto out; 1073 } 1074 #endif 1075 1076 /* 1077 * verify that we can access the last block in the fs 1078 * if we're mounting read/write. 1079 */ 1080 1081 if (!ronly) { 1082 error = bread(devvp, fsbtodb(fs, fs->fs_size - 1), fs->fs_fsize, 1083 cred, 0, &bp); 1084 if (bp->b_bcount != fs->fs_fsize) 1085 error = EINVAL; 1086 if (error) { 1087 bset = BC_INVAL; 1088 goto out; 1089 } 1090 brelse(bp, BC_INVAL); 1091 bp = NULL; 1092 } 1093 1094 fs->fs_ronly = ronly; 1095 /* Don't bump fs_clean if we're replaying journal */ 1096 if (!((fs->fs_flags & FS_DOWAPBL) && (fs->fs_clean & FS_WASCLEAN))) 1097 if (ronly == 0) { 1098 fs->fs_clean <<= 1; 1099 fs->fs_fmod = 1; 1100 } 1101 bsize = fs->fs_cssize; 1102 blks = howmany(bsize, fs->fs_fsize); 1103 if (fs->fs_contigsumsize > 0) 1104 bsize += fs->fs_ncg * sizeof(int32_t); 1105 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1106 space = malloc((u_long)bsize, M_UFSMNT, M_WAITOK); 1107 fs->fs_csp = space; 1108 for (i = 0; i < blks; i += fs->fs_frag) { 1109 bsize = fs->fs_bsize; 1110 if (i + fs->fs_frag > blks) 1111 bsize = (blks - i) * fs->fs_fsize; 1112 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize, 1113 cred, 0, &bp); 1114 if (error) { 1115 free(fs->fs_csp, M_UFSMNT); 1116 goto out; 1117 } 1118 #ifdef FFS_EI 1119 if (needswap) 1120 ffs_csum_swap((struct csum *)bp->b_data, 1121 (struct csum *)space, bsize); 1122 else 1123 #endif 1124 memcpy(space, bp->b_data, (u_int)bsize); 1125 1126 space = (char *)space + bsize; 1127 brelse(bp, 0); 1128 bp = NULL; 1129 } 1130 if (fs->fs_contigsumsize > 0) { 1131 fs->fs_maxcluster = lp = space; 1132 for (i = 0; i < fs->fs_ncg; i++) 1133 *lp++ = fs->fs_contigsumsize; 1134 space = lp; 1135 } 1136 bsize = fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1137 fs->fs_contigdirs = space; 1138 space = (char *)space + bsize; 1139 memset(fs->fs_contigdirs, 0, bsize); 1140 /* Compatibility for old filesystems - XXX */ 1141 if (fs->fs_avgfilesize <= 0) 1142 fs->fs_avgfilesize = AVFILESIZ; 1143 if (fs->fs_avgfpdir <= 0) 1144 fs->fs_avgfpdir = AFPDIR; 1145 fs->fs_active = NULL; 1146 mp->mnt_data = ump; 1147 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1148 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS); 1149 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1150 mp->mnt_stat.f_namemax = FFS_MAXNAMLEN; 1151 if (UFS_MPISAPPLEUFS(ump)) { 1152 /* NeXT used to keep short symlinks in the inode even 1153 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen 1154 * is probably -1, but we still need to be able to identify 1155 * short symlinks. 1156 */ 1157 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 1158 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 1159 mp->mnt_iflag |= IMNT_DTYPE; 1160 } else { 1161 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 1162 ump->um_dirblksiz = DIRBLKSIZ; 1163 if (ump->um_maxsymlinklen > 0) 1164 mp->mnt_iflag |= IMNT_DTYPE; 1165 else 1166 mp->mnt_iflag &= ~IMNT_DTYPE; 1167 } 1168 mp->mnt_fs_bshift = fs->fs_bshift; 1169 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 1170 mp->mnt_flag |= MNT_LOCAL; 1171 mp->mnt_iflag |= IMNT_MPSAFE; 1172 #ifdef XIP 1173 if ((mp->mnt_flag & MNT_RDONLY) == 0) 1174 printf("XIP needs read-only mount\n"); 1175 else { 1176 void *physseg = NULL; 1177 1178 if ((VOP_IOCTL(devvp, DIOCGPHYSADDR, &physseg, FREAD, 1179 cred) == 0) && 1180 physseg != NULL) { 1181 mp->mnt_iflag |= IMNT_XIP; 1182 devvp->v_physseg = physseg; 1183 } else 1184 printf("device doesn't support DIOCGPHYSADDR\n"); 1185 } 1186 #endif 1187 #ifdef FFS_EI 1188 if (needswap) 1189 ump->um_flags |= UFS_NEEDSWAP; 1190 #endif 1191 ump->um_mountp = mp; 1192 ump->um_dev = dev; 1193 ump->um_devvp = devvp; 1194 ump->um_nindir = fs->fs_nindir; 1195 ump->um_lognindir = ffs(fs->fs_nindir) - 1; 1196 ump->um_bptrtodb = fs->fs_fshift - DEV_BSHIFT; 1197 ump->um_seqinc = fs->fs_frag; 1198 for (i = 0; i < MAXQUOTAS; i++) 1199 ump->um_quotas[i] = NULLVP; 1200 devvp->v_specmountpoint = mp; 1201 if (ronly == 0 && fs->fs_snapinum[0] != 0) 1202 ffs_snapshot_mount(mp); 1203 1204 #ifdef WAPBL 1205 if (!ronly) { 1206 KDASSERT(fs->fs_ronly == 0); 1207 /* 1208 * ffs_wapbl_start() needs mp->mnt_stat initialised if it 1209 * needs to create a new log file in-filesystem. 1210 */ 1211 ffs_statvfs(mp, &mp->mnt_stat); 1212 1213 error = ffs_wapbl_start(mp); 1214 if (error) { 1215 free(fs->fs_csp, M_UFSMNT); 1216 goto out; 1217 } 1218 } 1219 #endif /* WAPBL */ 1220 #ifdef UFS_EXTATTR 1221 /* 1222 * Initialize file-backed extended attributes on UFS1 file 1223 * systems. 1224 */ 1225 if (ump->um_fstype == UFS1) { 1226 ufs_extattr_uepm_init(&ump->um_extattr); 1227 #ifdef UFS_EXTATTR_AUTOSTART 1228 /* 1229 * XXX Just ignore errors. Not clear that we should 1230 * XXX fail the mount in this case. 1231 */ 1232 (void) ufs_extattr_autostart(mp, l); 1233 #endif 1234 } 1235 #endif /* UFS_EXTATTR */ 1236 return (0); 1237 out: 1238 #ifdef WAPBL 1239 if (mp->mnt_wapbl_replay) { 1240 wapbl_replay_stop(mp->mnt_wapbl_replay); 1241 wapbl_replay_free(mp->mnt_wapbl_replay); 1242 mp->mnt_wapbl_replay = 0; 1243 } 1244 #endif 1245 1246 fstrans_unmount(mp); 1247 if (fs) 1248 free(fs, M_UFSMNT); 1249 devvp->v_specmountpoint = NULL; 1250 if (bp) 1251 brelse(bp, bset); 1252 if (ump) { 1253 if (ump->um_oldfscompat) 1254 free(ump->um_oldfscompat, M_UFSMNT); 1255 mutex_destroy(&ump->um_lock); 1256 free(ump, M_UFSMNT); 1257 mp->mnt_data = NULL; 1258 } 1259 return (error); 1260 } 1261 1262 /* 1263 * Sanity checks for loading old filesystem superblocks. 1264 * See ffs_oldfscompat_write below for unwound actions. 1265 * 1266 * XXX - Parts get retired eventually. 1267 * Unfortunately new bits get added. 1268 */ 1269 static void 1270 ffs_oldfscompat_read(struct fs *fs, struct ufsmount *ump, daddr_t sblockloc) 1271 { 1272 off_t maxfilesize; 1273 int32_t *extrasave; 1274 1275 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1276 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1277 return; 1278 1279 if (!ump->um_oldfscompat) 1280 ump->um_oldfscompat = malloc(512 + 3*sizeof(int32_t), 1281 M_UFSMNT, M_WAITOK); 1282 1283 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512); 1284 extrasave = ump->um_oldfscompat; 1285 extrasave += 512/sizeof(int32_t); 1286 extrasave[0] = fs->fs_old_npsect; 1287 extrasave[1] = fs->fs_old_interleave; 1288 extrasave[2] = fs->fs_old_trackskew; 1289 1290 /* These fields will be overwritten by their 1291 * original values in fs_oldfscompat_write, so it is harmless 1292 * to modify them here. 1293 */ 1294 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1295 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1296 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1297 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1298 1299 fs->fs_maxbsize = fs->fs_bsize; 1300 fs->fs_time = fs->fs_old_time; 1301 fs->fs_size = fs->fs_old_size; 1302 fs->fs_dsize = fs->fs_old_dsize; 1303 fs->fs_csaddr = fs->fs_old_csaddr; 1304 fs->fs_sblockloc = sblockloc; 1305 1306 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL); 1307 1308 if (fs->fs_old_postblformat == FS_42POSTBLFMT) { 1309 fs->fs_old_nrpos = 8; 1310 fs->fs_old_npsect = fs->fs_old_nsect; 1311 fs->fs_old_interleave = 1; 1312 fs->fs_old_trackskew = 0; 1313 } 1314 1315 if (fs->fs_old_inodefmt < FS_44INODEFMT) { 1316 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 1317 fs->fs_qbmask = ~fs->fs_bmask; 1318 fs->fs_qfmask = ~fs->fs_fmask; 1319 } 1320 1321 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1; 1322 if (fs->fs_maxfilesize > maxfilesize) 1323 fs->fs_maxfilesize = maxfilesize; 1324 1325 /* Compatibility for old filesystems */ 1326 if (fs->fs_avgfilesize <= 0) 1327 fs->fs_avgfilesize = AVFILESIZ; 1328 if (fs->fs_avgfpdir <= 0) 1329 fs->fs_avgfpdir = AFPDIR; 1330 1331 #if 0 1332 if (bigcgs) { 1333 fs->fs_save_cgsize = fs->fs_cgsize; 1334 fs->fs_cgsize = fs->fs_bsize; 1335 } 1336 #endif 1337 } 1338 1339 /* 1340 * Unwinding superblock updates for old filesystems. 1341 * See ffs_oldfscompat_read above for details. 1342 * 1343 * XXX - Parts get retired eventually. 1344 * Unfortunately new bits get added. 1345 */ 1346 static void 1347 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump) 1348 { 1349 int32_t *extrasave; 1350 1351 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1352 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1353 return; 1354 1355 fs->fs_old_time = fs->fs_time; 1356 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1357 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1358 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1359 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1360 fs->fs_old_flags = fs->fs_flags; 1361 1362 #if 0 1363 if (bigcgs) { 1364 fs->fs_cgsize = fs->fs_save_cgsize; 1365 } 1366 #endif 1367 1368 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512); 1369 extrasave = ump->um_oldfscompat; 1370 extrasave += 512/sizeof(int32_t); 1371 fs->fs_old_npsect = extrasave[0]; 1372 fs->fs_old_interleave = extrasave[1]; 1373 fs->fs_old_trackskew = extrasave[2]; 1374 1375 } 1376 1377 /* 1378 * unmount vfs operation 1379 */ 1380 int 1381 ffs_unmount(struct mount *mp, int mntflags) 1382 { 1383 struct lwp *l = curlwp; 1384 struct ufsmount *ump = VFSTOUFS(mp); 1385 struct fs *fs = ump->um_fs; 1386 int error, flags; 1387 #ifdef WAPBL 1388 extern int doforce; 1389 #endif 1390 1391 flags = 0; 1392 if (mntflags & MNT_FORCE) 1393 flags |= FORCECLOSE; 1394 if ((error = ffs_flushfiles(mp, flags, l)) != 0) 1395 return (error); 1396 error = UFS_WAPBL_BEGIN(mp); 1397 if (error == 0) 1398 if (fs->fs_ronly == 0 && 1399 ffs_cgupdate(ump, MNT_WAIT) == 0 && 1400 fs->fs_clean & FS_WASCLEAN) { 1401 fs->fs_clean = FS_ISCLEAN; 1402 fs->fs_fmod = 0; 1403 (void) ffs_sbupdate(ump, MNT_WAIT); 1404 } 1405 if (error == 0) 1406 UFS_WAPBL_END(mp); 1407 #ifdef WAPBL 1408 KASSERT(!(mp->mnt_wapbl_replay && mp->mnt_wapbl)); 1409 if (mp->mnt_wapbl_replay) { 1410 KDASSERT(fs->fs_ronly); 1411 wapbl_replay_stop(mp->mnt_wapbl_replay); 1412 wapbl_replay_free(mp->mnt_wapbl_replay); 1413 mp->mnt_wapbl_replay = 0; 1414 } 1415 error = ffs_wapbl_stop(mp, doforce && (mntflags & MNT_FORCE)); 1416 if (error) { 1417 return error; 1418 } 1419 #endif /* WAPBL */ 1420 #ifdef UFS_EXTATTR 1421 if (ump->um_fstype == UFS1) { 1422 ufs_extattr_stop(mp, l); 1423 ufs_extattr_uepm_destroy(&ump->um_extattr); 1424 } 1425 #endif /* UFS_EXTATTR */ 1426 1427 if (ump->um_devvp->v_type != VBAD) 1428 ump->um_devvp->v_specmountpoint = NULL; 1429 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1430 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE, 1431 NOCRED); 1432 vput(ump->um_devvp); 1433 free(fs->fs_csp, M_UFSMNT); 1434 free(fs, M_UFSMNT); 1435 if (ump->um_oldfscompat != NULL) 1436 free(ump->um_oldfscompat, M_UFSMNT); 1437 mutex_destroy(&ump->um_lock); 1438 ffs_snapshot_fini(ump); 1439 free(ump, M_UFSMNT); 1440 mp->mnt_data = NULL; 1441 mp->mnt_flag &= ~MNT_LOCAL; 1442 fstrans_unmount(mp); 1443 return (0); 1444 } 1445 1446 /* 1447 * Flush out all the files in a filesystem. 1448 */ 1449 int 1450 ffs_flushfiles(struct mount *mp, int flags, struct lwp *l) 1451 { 1452 extern int doforce; 1453 struct ufsmount *ump; 1454 int error; 1455 1456 if (!doforce) 1457 flags &= ~FORCECLOSE; 1458 ump = VFSTOUFS(mp); 1459 #ifdef QUOTA 1460 if (mp->mnt_flag & MNT_QUOTA) { 1461 int i; 1462 if ((error = vflush(mp, NULLVP, SKIPSYSTEM | flags)) != 0) 1463 return (error); 1464 for (i = 0; i < MAXQUOTAS; i++) { 1465 if (ump->um_quotas[i] == NULLVP) 1466 continue; 1467 quotaoff(l, mp, i); 1468 } 1469 /* 1470 * Here we fall through to vflush again to ensure 1471 * that we have gotten rid of all the system vnodes. 1472 */ 1473 } 1474 #endif 1475 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1476 return (error); 1477 ffs_snapshot_unmount(mp); 1478 /* 1479 * Flush all the files. 1480 */ 1481 error = vflush(mp, NULLVP, flags); 1482 if (error) 1483 return (error); 1484 /* 1485 * Flush filesystem metadata. 1486 */ 1487 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1488 error = VOP_FSYNC(ump->um_devvp, l->l_cred, FSYNC_WAIT, 0, 0); 1489 VOP_UNLOCK(ump->um_devvp, 0); 1490 if (flags & FORCECLOSE) /* XXXDBJ */ 1491 error = 0; 1492 1493 #ifdef WAPBL 1494 if (error) 1495 return error; 1496 if (mp->mnt_wapbl) { 1497 error = wapbl_flush(mp->mnt_wapbl, 1); 1498 if (flags & FORCECLOSE) 1499 error = 0; 1500 } 1501 #endif 1502 1503 return (error); 1504 } 1505 1506 /* 1507 * Get file system statistics. 1508 */ 1509 int 1510 ffs_statvfs(struct mount *mp, struct statvfs *sbp) 1511 { 1512 struct ufsmount *ump; 1513 struct fs *fs; 1514 1515 ump = VFSTOUFS(mp); 1516 fs = ump->um_fs; 1517 mutex_enter(&ump->um_lock); 1518 sbp->f_bsize = fs->fs_bsize; 1519 sbp->f_frsize = fs->fs_fsize; 1520 sbp->f_iosize = fs->fs_bsize; 1521 sbp->f_blocks = fs->fs_dsize; 1522 sbp->f_bfree = blkstofrags(fs, fs->fs_cstotal.cs_nbfree) + 1523 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1524 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t) 1525 fs->fs_minfree) / (u_int64_t) 100; 1526 if (sbp->f_bfree > sbp->f_bresvd) 1527 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1528 else 1529 sbp->f_bavail = 0; 1530 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1531 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1532 sbp->f_favail = sbp->f_ffree; 1533 sbp->f_fresvd = 0; 1534 mutex_exit(&ump->um_lock); 1535 copy_statvfs_info(sbp, mp); 1536 1537 return (0); 1538 } 1539 1540 /* 1541 * Go through the disk queues to initiate sandbagged IO; 1542 * go through the inodes to write those that have been modified; 1543 * initiate the writing of the super block if it has been modified. 1544 * 1545 * Note: we are always called with the filesystem marked `MPBUSY'. 1546 */ 1547 int 1548 ffs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1549 { 1550 struct vnode *vp, *mvp, *nvp; 1551 struct inode *ip; 1552 struct ufsmount *ump = VFSTOUFS(mp); 1553 struct fs *fs; 1554 int lk_flags, error, allerror = 0; 1555 bool is_suspending; 1556 1557 fs = ump->um_fs; 1558 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1559 printf("fs = %s\n", fs->fs_fsmnt); 1560 panic("update: rofs mod"); 1561 } 1562 1563 /* Allocate a marker vnode. */ 1564 if ((mvp = vnalloc(mp)) == NULL) 1565 return (ENOMEM); 1566 1567 fstrans_start(mp, FSTRANS_SHARED); 1568 is_suspending = (fstrans_getstate(mp) == FSTRANS_SUSPENDING); 1569 /* 1570 * We can't lock vnodes while the file system is suspending because 1571 * threads waiting on fstrans may have locked vnodes. 1572 */ 1573 if (is_suspending) 1574 lk_flags = LK_INTERLOCK; 1575 else 1576 lk_flags = LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK; 1577 /* 1578 * Write back each (modified) inode. 1579 */ 1580 mutex_enter(&mntvnode_lock); 1581 loop: 1582 /* 1583 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 1584 * and vclean() can be called indirectly 1585 */ 1586 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = nvp) { 1587 nvp = TAILQ_NEXT(vp, v_mntvnodes); 1588 /* 1589 * If the vnode that we are about to sync is no longer 1590 * associated with this mount point, start over. 1591 */ 1592 if (vp->v_mount != mp) 1593 goto loop; 1594 /* 1595 * Don't interfere with concurrent scans of this FS. 1596 */ 1597 if (vismarker(vp)) 1598 continue; 1599 mutex_enter(&vp->v_interlock); 1600 ip = VTOI(vp); 1601 1602 /* 1603 * Skip the vnode/inode if inaccessible. 1604 */ 1605 if (ip == NULL || (vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0 || 1606 vp->v_type == VNON) { 1607 mutex_exit(&vp->v_interlock); 1608 continue; 1609 } 1610 1611 /* 1612 * We deliberately update inode times here. This will 1613 * prevent a massive queue of updates accumulating, only 1614 * to be handled by a call to unmount. 1615 * 1616 * XXX It would be better to have the syncer trickle these 1617 * out. Adjustment needed to allow registering vnodes for 1618 * sync when the vnode is clean, but the inode dirty. Or 1619 * have ufs itself trickle out inode updates. 1620 * 1621 * If doing a lazy sync, we don't care about metadata or 1622 * data updates, because they are handled by each vnode's 1623 * synclist entry. In this case we are only interested in 1624 * writing back modified inodes. 1625 */ 1626 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | 1627 IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) == 0 && 1628 (waitfor == MNT_LAZY || (LIST_EMPTY(&vp->v_dirtyblkhd) && 1629 UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) { 1630 mutex_exit(&vp->v_interlock); 1631 continue; 1632 } 1633 if (vp->v_type == VBLK && is_suspending) { 1634 mutex_exit(&vp->v_interlock); 1635 continue; 1636 } 1637 vmark(mvp, vp); 1638 mutex_exit(&mntvnode_lock); 1639 error = vget(vp, lk_flags); 1640 if (error) { 1641 mutex_enter(&mntvnode_lock); 1642 nvp = vunmark(mvp); 1643 if (error == ENOENT) { 1644 goto loop; 1645 } 1646 continue; 1647 } 1648 if (waitfor == MNT_LAZY) { 1649 error = UFS_WAPBL_BEGIN(vp->v_mount); 1650 if (!error) { 1651 error = ffs_update(vp, NULL, NULL, 1652 UPDATE_CLOSE); 1653 UFS_WAPBL_END(vp->v_mount); 1654 } 1655 } else { 1656 error = VOP_FSYNC(vp, cred, FSYNC_NOLOG | 1657 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0), 0, 0); 1658 } 1659 if (error) 1660 allerror = error; 1661 if (is_suspending) 1662 vrele(vp); 1663 else 1664 vput(vp); 1665 mutex_enter(&mntvnode_lock); 1666 nvp = vunmark(mvp); 1667 } 1668 mutex_exit(&mntvnode_lock); 1669 /* 1670 * Force stale file system control information to be flushed. 1671 */ 1672 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 || 1673 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) { 1674 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1675 if ((error = VOP_FSYNC(ump->um_devvp, cred, 1676 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0) | FSYNC_NOLOG, 1677 0, 0)) != 0) 1678 allerror = error; 1679 VOP_UNLOCK(ump->um_devvp, 0); 1680 if (allerror == 0 && waitfor == MNT_WAIT && !mp->mnt_wapbl) { 1681 mutex_enter(&mntvnode_lock); 1682 goto loop; 1683 } 1684 } 1685 #ifdef QUOTA 1686 qsync(mp); 1687 #endif 1688 /* 1689 * Write back modified superblock. 1690 */ 1691 if (fs->fs_fmod != 0) { 1692 fs->fs_fmod = 0; 1693 fs->fs_time = time_second; 1694 error = UFS_WAPBL_BEGIN(mp); 1695 if (error) 1696 allerror = error; 1697 else { 1698 if ((error = ffs_cgupdate(ump, waitfor))) 1699 allerror = error; 1700 UFS_WAPBL_END(mp); 1701 } 1702 } 1703 1704 #ifdef WAPBL 1705 if (mp->mnt_wapbl) { 1706 error = wapbl_flush(mp->mnt_wapbl, 0); 1707 if (error) 1708 allerror = error; 1709 } 1710 #endif 1711 1712 fstrans_done(mp); 1713 vnfree(mvp); 1714 return (allerror); 1715 } 1716 1717 /* 1718 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1719 * in from disk. If it is in core, wait for the lock bit to clear, then 1720 * return the inode locked. Detection and handling of mount points must be 1721 * done by the calling routine. 1722 */ 1723 int 1724 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1725 { 1726 struct fs *fs; 1727 struct inode *ip; 1728 struct ufsmount *ump; 1729 struct buf *bp; 1730 struct vnode *vp; 1731 dev_t dev; 1732 int error; 1733 1734 ump = VFSTOUFS(mp); 1735 dev = ump->um_dev; 1736 1737 retry: 1738 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1739 return (0); 1740 1741 /* Allocate a new vnode/inode. */ 1742 if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) { 1743 *vpp = NULL; 1744 return (error); 1745 } 1746 ip = pool_cache_get(ffs_inode_cache, PR_WAITOK); 1747 1748 /* 1749 * If someone beat us to it, put back the freshly allocated 1750 * vnode/inode pair and retry. 1751 */ 1752 mutex_enter(&ufs_hashlock); 1753 if (ufs_ihashget(dev, ino, 0) != NULL) { 1754 mutex_exit(&ufs_hashlock); 1755 ungetnewvnode(vp); 1756 pool_cache_put(ffs_inode_cache, ip); 1757 goto retry; 1758 } 1759 1760 vp->v_vflag |= VV_LOCKSWORK; 1761 1762 #ifdef XIP 1763 if ((vp->v_mount->mnt_iflag & IMNT_XIP) != 0) { 1764 vp->v_vflag |= VV_XIP; 1765 } 1766 #endif 1767 1768 /* 1769 * XXX MFS ends up here, too, to allocate an inode. Should we 1770 * XXX create another pool for MFS inodes? 1771 */ 1772 1773 memset(ip, 0, sizeof(struct inode)); 1774 vp->v_data = ip; 1775 ip->i_vnode = vp; 1776 ip->i_ump = ump; 1777 ip->i_fs = fs = ump->um_fs; 1778 ip->i_dev = dev; 1779 ip->i_number = ino; 1780 #ifdef QUOTA 1781 ufsquota_init(ip); 1782 #endif 1783 1784 /* 1785 * Initialize genfs node, we might proceed to destroy it in 1786 * error branches. 1787 */ 1788 genfs_node_init(vp, &ffs_genfsops); 1789 1790 /* 1791 * Put it onto its hash chain and lock it so that other requests for 1792 * this inode will block if they arrive while we are sleeping waiting 1793 * for old data structures to be purged or for the contents of the 1794 * disk portion of this inode to be read. 1795 */ 1796 1797 ufs_ihashins(ip); 1798 mutex_exit(&ufs_hashlock); 1799 1800 /* Read in the disk contents for the inode, copy into the inode. */ 1801 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1802 (int)fs->fs_bsize, NOCRED, 0, &bp); 1803 if (error) { 1804 1805 /* 1806 * The inode does not contain anything useful, so it would 1807 * be misleading to leave it on its hash chain. With mode 1808 * still zero, it will be unlinked and returned to the free 1809 * list by vput(). 1810 */ 1811 1812 vput(vp); 1813 brelse(bp, 0); 1814 *vpp = NULL; 1815 return (error); 1816 } 1817 if (ip->i_ump->um_fstype == UFS1) 1818 ip->i_din.ffs1_din = pool_cache_get(ffs_dinode1_cache, 1819 PR_WAITOK); 1820 else 1821 ip->i_din.ffs2_din = pool_cache_get(ffs_dinode2_cache, 1822 PR_WAITOK); 1823 ffs_load_inode(bp, ip, fs, ino); 1824 brelse(bp, 0); 1825 1826 /* 1827 * Initialize the vnode from the inode, check for aliases. 1828 * Note that the underlying vnode may have changed. 1829 */ 1830 1831 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1832 1833 /* 1834 * Finish inode initialization now that aliasing has been resolved. 1835 */ 1836 1837 ip->i_devvp = ump->um_devvp; 1838 vref(ip->i_devvp); 1839 1840 /* 1841 * Ensure that uid and gid are correct. This is a temporary 1842 * fix until fsck has been changed to do the update. 1843 */ 1844 1845 if (fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1846 ip->i_uid = ip->i_ffs1_ouid; /* XXX */ 1847 ip->i_gid = ip->i_ffs1_ogid; /* XXX */ 1848 } /* XXX */ 1849 uvm_vnp_setsize(vp, ip->i_size); 1850 *vpp = vp; 1851 return (0); 1852 } 1853 1854 /* 1855 * File handle to vnode 1856 * 1857 * Have to be really careful about stale file handles: 1858 * - check that the inode number is valid 1859 * - call ffs_vget() to get the locked inode 1860 * - check for an unallocated inode (i_mode == 0) 1861 * - check that the given client host has export rights and return 1862 * those rights via. exflagsp and credanonp 1863 */ 1864 int 1865 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1866 { 1867 struct ufid ufh; 1868 struct fs *fs; 1869 1870 if (fhp->fid_len != sizeof(struct ufid)) 1871 return EINVAL; 1872 1873 memcpy(&ufh, fhp, sizeof(ufh)); 1874 fs = VFSTOUFS(mp)->um_fs; 1875 if (ufh.ufid_ino < ROOTINO || 1876 ufh.ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1877 return (ESTALE); 1878 return (ufs_fhtovp(mp, &ufh, vpp)); 1879 } 1880 1881 /* 1882 * Vnode pointer to File handle 1883 */ 1884 /* ARGSUSED */ 1885 int 1886 ffs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1887 { 1888 struct inode *ip; 1889 struct ufid ufh; 1890 1891 if (*fh_size < sizeof(struct ufid)) { 1892 *fh_size = sizeof(struct ufid); 1893 return E2BIG; 1894 } 1895 ip = VTOI(vp); 1896 *fh_size = sizeof(struct ufid); 1897 memset(&ufh, 0, sizeof(ufh)); 1898 ufh.ufid_len = sizeof(struct ufid); 1899 ufh.ufid_ino = ip->i_number; 1900 ufh.ufid_gen = ip->i_gen; 1901 memcpy(fhp, &ufh, sizeof(ufh)); 1902 return (0); 1903 } 1904 1905 void 1906 ffs_init(void) 1907 { 1908 if (ffs_initcount++ > 0) 1909 return; 1910 1911 ffs_inode_cache = pool_cache_init(sizeof(struct inode), 0, 0, 0, 1912 "ffsino", NULL, IPL_NONE, NULL, NULL, NULL); 1913 ffs_dinode1_cache = pool_cache_init(sizeof(struct ufs1_dinode), 0, 0, 0, 1914 "ffsdino1", NULL, IPL_NONE, NULL, NULL, NULL); 1915 ffs_dinode2_cache = pool_cache_init(sizeof(struct ufs2_dinode), 0, 0, 0, 1916 "ffsdino2", NULL, IPL_NONE, NULL, NULL, NULL); 1917 ufs_init(); 1918 } 1919 1920 void 1921 ffs_reinit(void) 1922 { 1923 1924 ufs_reinit(); 1925 } 1926 1927 void 1928 ffs_done(void) 1929 { 1930 if (--ffs_initcount > 0) 1931 return; 1932 1933 ufs_done(); 1934 pool_cache_destroy(ffs_dinode2_cache); 1935 pool_cache_destroy(ffs_dinode1_cache); 1936 pool_cache_destroy(ffs_inode_cache); 1937 } 1938 1939 /* 1940 * Write a superblock and associated information back to disk. 1941 */ 1942 int 1943 ffs_sbupdate(struct ufsmount *mp, int waitfor) 1944 { 1945 struct fs *fs = mp->um_fs; 1946 struct buf *bp; 1947 int error = 0; 1948 u_int32_t saveflag; 1949 1950 error = ffs_getblk(mp->um_devvp, 1951 fs->fs_sblockloc / DEV_BSIZE, FFS_NOBLK, 1952 fs->fs_sbsize, false, &bp); 1953 if (error) 1954 return error; 1955 saveflag = fs->fs_flags & FS_INTERNAL; 1956 fs->fs_flags &= ~FS_INTERNAL; 1957 1958 memcpy(bp->b_data, fs, fs->fs_sbsize); 1959 1960 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1961 #ifdef FFS_EI 1962 if (mp->um_flags & UFS_NEEDSWAP) 1963 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data); 1964 #endif 1965 fs->fs_flags |= saveflag; 1966 1967 if (waitfor == MNT_WAIT) 1968 error = bwrite(bp); 1969 else 1970 bawrite(bp); 1971 return (error); 1972 } 1973 1974 int 1975 ffs_cgupdate(struct ufsmount *mp, int waitfor) 1976 { 1977 struct fs *fs = mp->um_fs; 1978 struct buf *bp; 1979 int blks; 1980 void *space; 1981 int i, size, error = 0, allerror = 0; 1982 1983 allerror = ffs_sbupdate(mp, waitfor); 1984 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1985 space = fs->fs_csp; 1986 for (i = 0; i < blks; i += fs->fs_frag) { 1987 size = fs->fs_bsize; 1988 if (i + fs->fs_frag > blks) 1989 size = (blks - i) * fs->fs_fsize; 1990 error = ffs_getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1991 FFS_NOBLK, size, false, &bp); 1992 if (error) 1993 break; 1994 #ifdef FFS_EI 1995 if (mp->um_flags & UFS_NEEDSWAP) 1996 ffs_csum_swap((struct csum*)space, 1997 (struct csum*)bp->b_data, size); 1998 else 1999 #endif 2000 memcpy(bp->b_data, space, (u_int)size); 2001 space = (char *)space + size; 2002 if (waitfor == MNT_WAIT) 2003 error = bwrite(bp); 2004 else 2005 bawrite(bp); 2006 } 2007 if (!allerror && error) 2008 allerror = error; 2009 return (allerror); 2010 } 2011 2012 int 2013 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2014 int attrnamespace, const char *attrname) 2015 { 2016 #ifdef UFS_EXTATTR 2017 /* 2018 * File-backed extended attributes are only supported on UFS1. 2019 * UFS2 has native extended attributes. 2020 */ 2021 if (VFSTOUFS(mp)->um_fstype == UFS1) 2022 return (ufs_extattrctl(mp, cmd, vp, attrnamespace, attrname)); 2023 #endif 2024 return (vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname)); 2025 } 2026 2027 int 2028 ffs_suspendctl(struct mount *mp, int cmd) 2029 { 2030 int error; 2031 struct lwp *l = curlwp; 2032 2033 switch (cmd) { 2034 case SUSPEND_SUSPEND: 2035 if ((error = fstrans_setstate(mp, FSTRANS_SUSPENDING)) != 0) 2036 return error; 2037 error = ffs_sync(mp, MNT_WAIT, l->l_proc->p_cred); 2038 if (error == 0) 2039 error = fstrans_setstate(mp, FSTRANS_SUSPENDED); 2040 #ifdef WAPBL 2041 if (error == 0 && mp->mnt_wapbl) 2042 error = wapbl_flush(mp->mnt_wapbl, 1); 2043 #endif 2044 if (error != 0) { 2045 (void) fstrans_setstate(mp, FSTRANS_NORMAL); 2046 return error; 2047 } 2048 return 0; 2049 2050 case SUSPEND_RESUME: 2051 return fstrans_setstate(mp, FSTRANS_NORMAL); 2052 2053 default: 2054 return EINVAL; 2055 } 2056 } 2057 2058 /* 2059 * Synch vnode for a mounted file system. This is called for foreign 2060 * vnodes, i.e. non-ffs. 2061 */ 2062 static int 2063 ffs_vfs_fsync(vnode_t *vp, int flags) 2064 { 2065 int error, passes, skipmeta, i, pflags; 2066 buf_t *bp, *nbp; 2067 #ifdef WAPBL 2068 struct mount *mp; 2069 #endif 2070 2071 KASSERT(vp->v_type == VBLK); 2072 KASSERT(vp->v_specmountpoint != NULL); 2073 2074 /* 2075 * Flush all dirty data associated with the vnode. 2076 */ 2077 pflags = PGO_ALLPAGES | PGO_CLEANIT; 2078 if ((flags & FSYNC_WAIT) != 0) 2079 pflags |= PGO_SYNCIO; 2080 mutex_enter(&vp->v_interlock); 2081 error = VOP_PUTPAGES(vp, 0, 0, pflags); 2082 if (error) 2083 return error; 2084 2085 #ifdef WAPBL 2086 mp = vp->v_specmountpoint; 2087 if (mp && mp->mnt_wapbl) { 2088 /* 2089 * Don't bother writing out metadata if the syncer is 2090 * making the request. We will let the sync vnode 2091 * write it out in a single burst through a call to 2092 * VFS_SYNC(). 2093 */ 2094 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY | FSYNC_NOLOG)) != 0) 2095 return 0; 2096 2097 /* 2098 * Don't flush the log if the vnode being flushed 2099 * contains no dirty buffers that could be in the log. 2100 */ 2101 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 2102 error = wapbl_flush(mp->mnt_wapbl, 0); 2103 if (error) 2104 return error; 2105 } 2106 2107 if ((flags & FSYNC_WAIT) != 0) { 2108 mutex_enter(&vp->v_interlock); 2109 while (vp->v_numoutput) 2110 cv_wait(&vp->v_cv, &vp->v_interlock); 2111 mutex_exit(&vp->v_interlock); 2112 } 2113 2114 return 0; 2115 } 2116 #endif /* WAPBL */ 2117 2118 /* 2119 * Write out metadata for non-logging file systems. XXX This block 2120 * should be simplified now that softdep is gone. 2121 */ 2122 passes = NIADDR + 1; 2123 skipmeta = 0; 2124 if (flags & FSYNC_WAIT) 2125 skipmeta = 1; 2126 2127 loop: 2128 mutex_enter(&bufcache_lock); 2129 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 2130 bp->b_cflags &= ~BC_SCANNED; 2131 } 2132 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2133 nbp = LIST_NEXT(bp, b_vnbufs); 2134 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 2135 continue; 2136 if ((bp->b_oflags & BO_DELWRI) == 0) 2137 panic("ffs_fsync: not dirty"); 2138 if (skipmeta && bp->b_lblkno < 0) 2139 continue; 2140 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 2141 mutex_exit(&bufcache_lock); 2142 /* 2143 * On our final pass through, do all I/O synchronously 2144 * so that we can find out if our flush is failing 2145 * because of write errors. 2146 */ 2147 if (passes > 0 || !(flags & FSYNC_WAIT)) 2148 (void) bawrite(bp); 2149 else if ((error = bwrite(bp)) != 0) 2150 return (error); 2151 /* 2152 * Since we unlocked during the I/O, we need 2153 * to start from a known point. 2154 */ 2155 mutex_enter(&bufcache_lock); 2156 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 2157 } 2158 mutex_exit(&bufcache_lock); 2159 if (skipmeta) { 2160 skipmeta = 0; 2161 goto loop; 2162 } 2163 2164 if ((flags & FSYNC_WAIT) != 0) { 2165 mutex_enter(&vp->v_interlock); 2166 while (vp->v_numoutput) { 2167 cv_wait(&vp->v_cv, &vp->v_interlock); 2168 } 2169 mutex_exit(&vp->v_interlock); 2170 2171 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 2172 /* 2173 * Block devices associated with filesystems may 2174 * have new I/O requests posted for them even if 2175 * the vnode is locked, so no amount of trying will 2176 * get them clean. Thus we give block devices a 2177 * good effort, then just give up. For all other file 2178 * types, go around and try again until it is clean. 2179 */ 2180 if (passes > 0) { 2181 passes--; 2182 goto loop; 2183 } 2184 #ifdef DIAGNOSTIC 2185 if (vp->v_type != VBLK) 2186 vprint("ffs_fsync: dirty", vp); 2187 #endif 2188 } 2189 } 2190 2191 if (error == 0 && (flags & FSYNC_CACHE) != 0) { 2192 (void)VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE, 2193 kauth_cred_get()); 2194 } 2195 2196 return error; 2197 } 2198
Indexes created Sat Oct 18 17:09:52 GMT 2025