ffs_vfsops.c revision 1.257.2.3
1 /* $NetBSD: ffs_vfsops.c,v 1.257.2.3 2010/03/23 01:58:14 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 1.257.2.3 2010/03/23 01:58:14 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 uint64_t numsecs; 827 unsigned secsize; 828 #ifdef FFS_EI 829 int needswap = 0; /* keep gcc happy */ 830 #endif 831 int32_t *lp; 832 kauth_cred_t cred; 833 u_int32_t sbsize = 8192; /* keep gcc happy*/ 834 835 dev = devvp->v_rdev; 836 cred = l ? l->l_cred : NOCRED; 837 838 /* Flush out any old buffers remaining from a previous use. */ 839 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 840 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 841 VOP_UNLOCK(devvp, 0); 842 if (error) 843 return (error); 844 845 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 846 error = getdisksize(devvp, &numsecs, &secsize); 847 if (error) 848 return (error); 849 850 bp = NULL; 851 ump = NULL; 852 fs = NULL; 853 sblockloc = 0; 854 fstype = 0; 855 856 error = fstrans_mount(mp); 857 if (error) 858 return error; 859 860 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 861 memset(ump, 0, sizeof *ump); 862 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 863 error = ffs_snapshot_init(ump); 864 if (error) 865 goto out; 866 ump->um_ops = &ffs_ufsops; 867 868 #ifdef WAPBL 869 sbagain: 870 #endif 871 /* 872 * Try reading the superblock in each of its possible locations. 873 */ 874 for (i = 0; ; i++) { 875 if (bp != NULL) { 876 brelse(bp, BC_NOCACHE); 877 bp = NULL; 878 } 879 if (sblock_try[i] == -1) { 880 error = EINVAL; 881 fs = NULL; 882 goto out; 883 } 884 error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, cred, 885 0, &bp); 886 if (error) { 887 fs = NULL; 888 goto out; 889 } 890 fs = (struct fs*)bp->b_data; 891 fsblockloc = sblockloc = sblock_try[i]; 892 if (fs->fs_magic == FS_UFS1_MAGIC) { 893 sbsize = fs->fs_sbsize; 894 fstype = UFS1; 895 #ifdef FFS_EI 896 needswap = 0; 897 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC)) { 898 sbsize = bswap32(fs->fs_sbsize); 899 fstype = UFS1; 900 needswap = 1; 901 #endif 902 } else if (fs->fs_magic == FS_UFS2_MAGIC) { 903 sbsize = fs->fs_sbsize; 904 fstype = UFS2; 905 #ifdef FFS_EI 906 needswap = 0; 907 } else if (fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 908 sbsize = bswap32(fs->fs_sbsize); 909 fstype = UFS2; 910 needswap = 1; 911 #endif 912 } else 913 continue; 914 915 916 /* fs->fs_sblockloc isn't defined for old filesystems */ 917 if (fstype == UFS1 && !(fs->fs_old_flags & FS_FLAGS_UPDATED)) { 918 if (sblockloc == SBLOCK_UFS2) 919 /* 920 * This is likely to be the first alternate 921 * in a filesystem with 64k blocks. 922 * Don't use it. 923 */ 924 continue; 925 fsblockloc = sblockloc; 926 } else { 927 fsblockloc = fs->fs_sblockloc; 928 #ifdef FFS_EI 929 if (needswap) 930 fsblockloc = bswap64(fsblockloc); 931 #endif 932 } 933 934 /* Check we haven't found an alternate superblock */ 935 if (fsblockloc != sblockloc) 936 continue; 937 938 /* Validate size of superblock */ 939 if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs)) 940 continue; 941 942 /* Ok seems to be a good superblock */ 943 break; 944 } 945 946 fs = malloc((u_long)sbsize, M_UFSMNT, M_WAITOK); 947 memcpy(fs, bp->b_data, sbsize); 948 ump->um_fs = fs; 949 950 #ifdef FFS_EI 951 if (needswap) { 952 ffs_sb_swap((struct fs*)bp->b_data, fs); 953 fs->fs_flags |= FS_SWAPPED; 954 } else 955 #endif 956 fs->fs_flags &= ~FS_SWAPPED; 957 958 #ifdef WAPBL 959 if ((mp->mnt_wapbl_replay == 0) && (fs->fs_flags & FS_DOWAPBL)) { 960 error = ffs_wapbl_replay_start(mp, fs, devvp); 961 if (error && (mp->mnt_flag & MNT_FORCE) == 0) 962 goto out; 963 if (!error) { 964 if (!ronly) { 965 /* XXX fsmnt may be stale. */ 966 printf("%s: replaying log to disk\n", 967 fs->fs_fsmnt); 968 error = wapbl_replay_write(mp->mnt_wapbl_replay, 969 devvp); 970 if (error) 971 goto out; 972 wapbl_replay_stop(mp->mnt_wapbl_replay); 973 fs->fs_clean = FS_WASCLEAN; 974 } else { 975 /* XXX fsmnt may be stale */ 976 printf("%s: replaying log to memory\n", 977 fs->fs_fsmnt); 978 } 979 980 /* Force a re-read of the superblock */ 981 brelse(bp, BC_INVAL); 982 bp = NULL; 983 free(fs, M_UFSMNT); 984 fs = NULL; 985 goto sbagain; 986 } 987 } 988 #else /* !WAPBL */ 989 if ((fs->fs_flags & FS_DOWAPBL) && (mp->mnt_flag & MNT_FORCE) == 0) { 990 error = EPERM; 991 goto out; 992 } 993 #endif /* !WAPBL */ 994 995 ffs_oldfscompat_read(fs, ump, sblockloc); 996 ump->um_maxfilesize = fs->fs_maxfilesize; 997 998 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) { 999 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n", 1000 mp->mnt_stat.f_mntonname, fs->fs_flags, 1001 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting"); 1002 if ((mp->mnt_flag & MNT_FORCE) == 0) { 1003 error = EINVAL; 1004 goto out; 1005 } 1006 } 1007 1008 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1009 fs->fs_pendingblocks = 0; 1010 fs->fs_pendinginodes = 0; 1011 } 1012 1013 ump->um_fstype = fstype; 1014 if (fs->fs_sbsize < SBLOCKSIZE) 1015 brelse(bp, BC_INVAL); 1016 else 1017 brelse(bp, 0); 1018 bp = NULL; 1019 1020 /* First check to see if this is tagged as an Apple UFS filesystem 1021 * in the disklabel 1022 */ 1023 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred) == 0) && 1024 (dpart.part->p_fstype == FS_APPLEUFS)) { 1025 ump->um_flags |= UFS_ISAPPLEUFS; 1026 } 1027 #ifdef APPLE_UFS 1028 else { 1029 /* Manually look for an apple ufs label, and if a valid one 1030 * is found, then treat it like an Apple UFS filesystem anyway 1031 */ 1032 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE), 1033 APPLEUFS_LABEL_SIZE, cred, 0, &bp); 1034 if (error) 1035 goto out; 1036 error = ffs_appleufs_validate(fs->fs_fsmnt, 1037 (struct appleufslabel *)bp->b_data, NULL); 1038 if (error == 0) { 1039 ump->um_flags |= UFS_ISAPPLEUFS; 1040 } 1041 brelse(bp, 0); 1042 bp = NULL; 1043 } 1044 #else 1045 if (ump->um_flags & UFS_ISAPPLEUFS) { 1046 error = EINVAL; 1047 goto out; 1048 } 1049 #endif 1050 1051 #if 0 1052 /* 1053 * XXX This code changes the behaviour of mounting dirty filesystems, to 1054 * XXX require "mount -f ..." to mount them. This doesn't match what 1055 * XXX mount(8) describes and is disabled for now. 1056 */ 1057 /* 1058 * If the file system is not clean, don't allow it to be mounted 1059 * unless MNT_FORCE is specified. (Note: MNT_FORCE is always set 1060 * for the root file system.) 1061 */ 1062 if (fs->fs_flags & FS_DOWAPBL) { 1063 /* 1064 * wapbl normally expects to be FS_WASCLEAN when the FS_DOWAPBL 1065 * bit is set, although there's a window in unmount where it 1066 * could be FS_ISCLEAN 1067 */ 1068 if ((mp->mnt_flag & MNT_FORCE) == 0 && 1069 (fs->fs_clean & (FS_WASCLEAN | FS_ISCLEAN)) == 0) { 1070 error = EPERM; 1071 goto out; 1072 } 1073 } else 1074 if ((fs->fs_clean & FS_ISCLEAN) == 0 && 1075 (mp->mnt_flag & MNT_FORCE) == 0) { 1076 error = EPERM; 1077 goto out; 1078 } 1079 #endif 1080 1081 /* 1082 * verify that we can access the last block in the fs 1083 * if we're mounting read/write. 1084 */ 1085 1086 if (!ronly) { 1087 error = bread(devvp, fsbtodb(fs, fs->fs_size - 1), fs->fs_fsize, 1088 cred, 0, &bp); 1089 if (bp->b_bcount != fs->fs_fsize) 1090 error = EINVAL; 1091 if (error) { 1092 bset = BC_INVAL; 1093 goto out; 1094 } 1095 brelse(bp, BC_INVAL); 1096 bp = NULL; 1097 } 1098 1099 fs->fs_ronly = ronly; 1100 /* Don't bump fs_clean if we're replaying journal */ 1101 if (!((fs->fs_flags & FS_DOWAPBL) && (fs->fs_clean & FS_WASCLEAN))) 1102 if (ronly == 0) { 1103 fs->fs_clean <<= 1; 1104 fs->fs_fmod = 1; 1105 } 1106 bsize = fs->fs_cssize; 1107 blks = howmany(bsize, fs->fs_fsize); 1108 if (fs->fs_contigsumsize > 0) 1109 bsize += fs->fs_ncg * sizeof(int32_t); 1110 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1111 space = malloc((u_long)bsize, M_UFSMNT, M_WAITOK); 1112 fs->fs_csp = space; 1113 for (i = 0; i < blks; i += fs->fs_frag) { 1114 bsize = fs->fs_bsize; 1115 if (i + fs->fs_frag > blks) 1116 bsize = (blks - i) * fs->fs_fsize; 1117 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize, 1118 cred, 0, &bp); 1119 if (error) { 1120 free(fs->fs_csp, M_UFSMNT); 1121 goto out; 1122 } 1123 #ifdef FFS_EI 1124 if (needswap) 1125 ffs_csum_swap((struct csum *)bp->b_data, 1126 (struct csum *)space, bsize); 1127 else 1128 #endif 1129 memcpy(space, bp->b_data, (u_int)bsize); 1130 1131 space = (char *)space + bsize; 1132 brelse(bp, 0); 1133 bp = NULL; 1134 } 1135 if (fs->fs_contigsumsize > 0) { 1136 fs->fs_maxcluster = lp = space; 1137 for (i = 0; i < fs->fs_ncg; i++) 1138 *lp++ = fs->fs_contigsumsize; 1139 space = lp; 1140 } 1141 bsize = fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1142 fs->fs_contigdirs = space; 1143 space = (char *)space + bsize; 1144 memset(fs->fs_contigdirs, 0, bsize); 1145 /* Compatibility for old filesystems - XXX */ 1146 if (fs->fs_avgfilesize <= 0) 1147 fs->fs_avgfilesize = AVFILESIZ; 1148 if (fs->fs_avgfpdir <= 0) 1149 fs->fs_avgfpdir = AFPDIR; 1150 fs->fs_active = NULL; 1151 mp->mnt_data = ump; 1152 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1153 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS); 1154 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1155 mp->mnt_stat.f_namemax = FFS_MAXNAMLEN; 1156 if (UFS_MPISAPPLEUFS(ump)) { 1157 /* NeXT used to keep short symlinks in the inode even 1158 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen 1159 * is probably -1, but we still need to be able to identify 1160 * short symlinks. 1161 */ 1162 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 1163 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 1164 mp->mnt_iflag |= IMNT_DTYPE; 1165 } else { 1166 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 1167 ump->um_dirblksiz = DIRBLKSIZ; 1168 if (ump->um_maxsymlinklen > 0) 1169 mp->mnt_iflag |= IMNT_DTYPE; 1170 else 1171 mp->mnt_iflag &= ~IMNT_DTYPE; 1172 } 1173 mp->mnt_fs_bshift = fs->fs_bshift; 1174 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 1175 mp->mnt_flag |= MNT_LOCAL; 1176 mp->mnt_iflag |= IMNT_MPSAFE; 1177 #ifdef XIP 1178 paddr_t phys_addr = 0; 1179 if (mp->mnt_flag & MNT_XIP) { 1180 if ((mp->mnt_flag & MNT_RDONLY) == 0) 1181 printf("XIP needs read-only mount\n"); 1182 else { 1183 if ((VOP_IOCTL(devvp, DIOCGPHYSADDR, &phys_addr, FREAD, 1184 cred) == 0) && 1185 phys_addr != 0) { 1186 mp->mnt_iflag |= IMNT_XIP; 1187 devvp->v_phys_addr = phys_addr; /* XXX */ 1188 } else 1189 printf("device doesn't support DIOCGPHYSADDR\n"); 1190 } 1191 } 1192 #endif 1193 #ifdef FFS_EI 1194 if (needswap) 1195 ump->um_flags |= UFS_NEEDSWAP; 1196 #endif 1197 ump->um_mountp = mp; 1198 ump->um_dev = dev; 1199 ump->um_devvp = devvp; 1200 ump->um_nindir = fs->fs_nindir; 1201 ump->um_lognindir = ffs(fs->fs_nindir) - 1; 1202 ump->um_bptrtodb = fs->fs_fshift - DEV_BSHIFT; 1203 ump->um_seqinc = fs->fs_frag; 1204 for (i = 0; i < MAXQUOTAS; i++) 1205 ump->um_quotas[i] = NULLVP; 1206 devvp->v_specmountpoint = mp; 1207 if (ronly == 0 && fs->fs_snapinum[0] != 0) 1208 ffs_snapshot_mount(mp); 1209 1210 #ifdef WAPBL 1211 if (!ronly) { 1212 KDASSERT(fs->fs_ronly == 0); 1213 /* 1214 * ffs_wapbl_start() needs mp->mnt_stat initialised if it 1215 * needs to create a new log file in-filesystem. 1216 */ 1217 ffs_statvfs(mp, &mp->mnt_stat); 1218 1219 error = ffs_wapbl_start(mp); 1220 if (error) { 1221 free(fs->fs_csp, M_UFSMNT); 1222 goto out; 1223 } 1224 } 1225 #endif /* WAPBL */ 1226 #ifdef UFS_EXTATTR 1227 /* 1228 * Initialize file-backed extended attributes on UFS1 file 1229 * systems. 1230 */ 1231 if (ump->um_fstype == UFS1) { 1232 ufs_extattr_uepm_init(&ump->um_extattr); 1233 #ifdef UFS_EXTATTR_AUTOSTART 1234 /* 1235 * XXX Just ignore errors. Not clear that we should 1236 * XXX fail the mount in this case. 1237 */ 1238 (void) ufs_extattr_autostart(mp, l); 1239 #endif 1240 } 1241 #endif /* UFS_EXTATTR */ 1242 return (0); 1243 out: 1244 #ifdef WAPBL 1245 if (mp->mnt_wapbl_replay) { 1246 wapbl_replay_stop(mp->mnt_wapbl_replay); 1247 wapbl_replay_free(mp->mnt_wapbl_replay); 1248 mp->mnt_wapbl_replay = 0; 1249 } 1250 #endif 1251 1252 fstrans_unmount(mp); 1253 if (fs) 1254 free(fs, M_UFSMNT); 1255 devvp->v_specmountpoint = NULL; 1256 if (bp) 1257 brelse(bp, bset); 1258 if (ump) { 1259 if (ump->um_oldfscompat) 1260 free(ump->um_oldfscompat, M_UFSMNT); 1261 mutex_destroy(&ump->um_lock); 1262 free(ump, M_UFSMNT); 1263 mp->mnt_data = NULL; 1264 } 1265 return (error); 1266 } 1267 1268 /* 1269 * Sanity checks for loading old filesystem superblocks. 1270 * See ffs_oldfscompat_write below for unwound actions. 1271 * 1272 * XXX - Parts get retired eventually. 1273 * Unfortunately new bits get added. 1274 */ 1275 static void 1276 ffs_oldfscompat_read(struct fs *fs, struct ufsmount *ump, daddr_t sblockloc) 1277 { 1278 off_t maxfilesize; 1279 int32_t *extrasave; 1280 1281 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1282 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1283 return; 1284 1285 if (!ump->um_oldfscompat) 1286 ump->um_oldfscompat = malloc(512 + 3*sizeof(int32_t), 1287 M_UFSMNT, M_WAITOK); 1288 1289 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512); 1290 extrasave = ump->um_oldfscompat; 1291 extrasave += 512/sizeof(int32_t); 1292 extrasave[0] = fs->fs_old_npsect; 1293 extrasave[1] = fs->fs_old_interleave; 1294 extrasave[2] = fs->fs_old_trackskew; 1295 1296 /* These fields will be overwritten by their 1297 * original values in fs_oldfscompat_write, so it is harmless 1298 * to modify them here. 1299 */ 1300 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1301 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1302 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1303 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1304 1305 fs->fs_maxbsize = fs->fs_bsize; 1306 fs->fs_time = fs->fs_old_time; 1307 fs->fs_size = fs->fs_old_size; 1308 fs->fs_dsize = fs->fs_old_dsize; 1309 fs->fs_csaddr = fs->fs_old_csaddr; 1310 fs->fs_sblockloc = sblockloc; 1311 1312 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL); 1313 1314 if (fs->fs_old_postblformat == FS_42POSTBLFMT) { 1315 fs->fs_old_nrpos = 8; 1316 fs->fs_old_npsect = fs->fs_old_nsect; 1317 fs->fs_old_interleave = 1; 1318 fs->fs_old_trackskew = 0; 1319 } 1320 1321 if (fs->fs_old_inodefmt < FS_44INODEFMT) { 1322 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 1323 fs->fs_qbmask = ~fs->fs_bmask; 1324 fs->fs_qfmask = ~fs->fs_fmask; 1325 } 1326 1327 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1; 1328 if (fs->fs_maxfilesize > maxfilesize) 1329 fs->fs_maxfilesize = maxfilesize; 1330 1331 /* Compatibility for old filesystems */ 1332 if (fs->fs_avgfilesize <= 0) 1333 fs->fs_avgfilesize = AVFILESIZ; 1334 if (fs->fs_avgfpdir <= 0) 1335 fs->fs_avgfpdir = AFPDIR; 1336 1337 #if 0 1338 if (bigcgs) { 1339 fs->fs_save_cgsize = fs->fs_cgsize; 1340 fs->fs_cgsize = fs->fs_bsize; 1341 } 1342 #endif 1343 } 1344 1345 /* 1346 * Unwinding superblock updates for old filesystems. 1347 * See ffs_oldfscompat_read above for details. 1348 * 1349 * XXX - Parts get retired eventually. 1350 * Unfortunately new bits get added. 1351 */ 1352 static void 1353 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump) 1354 { 1355 int32_t *extrasave; 1356 1357 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1358 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1359 return; 1360 1361 fs->fs_old_time = fs->fs_time; 1362 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1363 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1364 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1365 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1366 fs->fs_old_flags = fs->fs_flags; 1367 1368 #if 0 1369 if (bigcgs) { 1370 fs->fs_cgsize = fs->fs_save_cgsize; 1371 } 1372 #endif 1373 1374 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512); 1375 extrasave = ump->um_oldfscompat; 1376 extrasave += 512/sizeof(int32_t); 1377 fs->fs_old_npsect = extrasave[0]; 1378 fs->fs_old_interleave = extrasave[1]; 1379 fs->fs_old_trackskew = extrasave[2]; 1380 1381 } 1382 1383 /* 1384 * unmount vfs operation 1385 */ 1386 int 1387 ffs_unmount(struct mount *mp, int mntflags) 1388 { 1389 struct lwp *l = curlwp; 1390 struct ufsmount *ump = VFSTOUFS(mp); 1391 struct fs *fs = ump->um_fs; 1392 int error, flags; 1393 #ifdef WAPBL 1394 extern int doforce; 1395 #endif 1396 1397 flags = 0; 1398 if (mntflags & MNT_FORCE) 1399 flags |= FORCECLOSE; 1400 if ((error = ffs_flushfiles(mp, flags, l)) != 0) 1401 return (error); 1402 error = UFS_WAPBL_BEGIN(mp); 1403 if (error == 0) 1404 if (fs->fs_ronly == 0 && 1405 ffs_cgupdate(ump, MNT_WAIT) == 0 && 1406 fs->fs_clean & FS_WASCLEAN) { 1407 fs->fs_clean = FS_ISCLEAN; 1408 fs->fs_fmod = 0; 1409 (void) ffs_sbupdate(ump, MNT_WAIT); 1410 } 1411 if (error == 0) 1412 UFS_WAPBL_END(mp); 1413 #ifdef WAPBL 1414 KASSERT(!(mp->mnt_wapbl_replay && mp->mnt_wapbl)); 1415 if (mp->mnt_wapbl_replay) { 1416 KDASSERT(fs->fs_ronly); 1417 wapbl_replay_stop(mp->mnt_wapbl_replay); 1418 wapbl_replay_free(mp->mnt_wapbl_replay); 1419 mp->mnt_wapbl_replay = 0; 1420 } 1421 error = ffs_wapbl_stop(mp, doforce && (mntflags & MNT_FORCE)); 1422 if (error) { 1423 return error; 1424 } 1425 #endif /* WAPBL */ 1426 #ifdef UFS_EXTATTR 1427 if (ump->um_fstype == UFS1) { 1428 ufs_extattr_stop(mp, l); 1429 ufs_extattr_uepm_destroy(&ump->um_extattr); 1430 } 1431 #endif /* UFS_EXTATTR */ 1432 1433 if (ump->um_devvp->v_type != VBAD) 1434 ump->um_devvp->v_specmountpoint = NULL; 1435 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1436 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE, 1437 NOCRED); 1438 vput(ump->um_devvp); 1439 free(fs->fs_csp, M_UFSMNT); 1440 free(fs, M_UFSMNT); 1441 if (ump->um_oldfscompat != NULL) 1442 free(ump->um_oldfscompat, M_UFSMNT); 1443 mutex_destroy(&ump->um_lock); 1444 ffs_snapshot_fini(ump); 1445 free(ump, M_UFSMNT); 1446 mp->mnt_data = NULL; 1447 mp->mnt_flag &= ~MNT_LOCAL; 1448 fstrans_unmount(mp); 1449 return (0); 1450 } 1451 1452 /* 1453 * Flush out all the files in a filesystem. 1454 */ 1455 int 1456 ffs_flushfiles(struct mount *mp, int flags, struct lwp *l) 1457 { 1458 extern int doforce; 1459 struct ufsmount *ump; 1460 int error; 1461 1462 if (!doforce) 1463 flags &= ~FORCECLOSE; 1464 ump = VFSTOUFS(mp); 1465 #ifdef QUOTA 1466 if (mp->mnt_flag & MNT_QUOTA) { 1467 int i; 1468 if ((error = vflush(mp, NULLVP, SKIPSYSTEM | flags)) != 0) 1469 return (error); 1470 for (i = 0; i < MAXQUOTAS; i++) { 1471 if (ump->um_quotas[i] == NULLVP) 1472 continue; 1473 quotaoff(l, mp, i); 1474 } 1475 /* 1476 * Here we fall through to vflush again to ensure 1477 * that we have gotten rid of all the system vnodes. 1478 */ 1479 } 1480 #endif 1481 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1482 return (error); 1483 ffs_snapshot_unmount(mp); 1484 /* 1485 * Flush all the files. 1486 */ 1487 error = vflush(mp, NULLVP, flags); 1488 if (error) 1489 return (error); 1490 /* 1491 * Flush filesystem metadata. 1492 */ 1493 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1494 error = VOP_FSYNC(ump->um_devvp, l->l_cred, FSYNC_WAIT, 0, 0); 1495 VOP_UNLOCK(ump->um_devvp, 0); 1496 if (flags & FORCECLOSE) /* XXXDBJ */ 1497 error = 0; 1498 1499 #ifdef WAPBL 1500 if (error) 1501 return error; 1502 if (mp->mnt_wapbl) { 1503 error = wapbl_flush(mp->mnt_wapbl, 1); 1504 if (flags & FORCECLOSE) 1505 error = 0; 1506 } 1507 #endif 1508 1509 return (error); 1510 } 1511 1512 /* 1513 * Get file system statistics. 1514 */ 1515 int 1516 ffs_statvfs(struct mount *mp, struct statvfs *sbp) 1517 { 1518 struct ufsmount *ump; 1519 struct fs *fs; 1520 1521 ump = VFSTOUFS(mp); 1522 fs = ump->um_fs; 1523 mutex_enter(&ump->um_lock); 1524 sbp->f_bsize = fs->fs_bsize; 1525 sbp->f_frsize = fs->fs_fsize; 1526 sbp->f_iosize = fs->fs_bsize; 1527 sbp->f_blocks = fs->fs_dsize; 1528 sbp->f_bfree = blkstofrags(fs, fs->fs_cstotal.cs_nbfree) + 1529 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1530 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t) 1531 fs->fs_minfree) / (u_int64_t) 100; 1532 if (sbp->f_bfree > sbp->f_bresvd) 1533 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1534 else 1535 sbp->f_bavail = 0; 1536 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1537 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1538 sbp->f_favail = sbp->f_ffree; 1539 sbp->f_fresvd = 0; 1540 mutex_exit(&ump->um_lock); 1541 copy_statvfs_info(sbp, mp); 1542 1543 return (0); 1544 } 1545 1546 /* 1547 * Go through the disk queues to initiate sandbagged IO; 1548 * go through the inodes to write those that have been modified; 1549 * initiate the writing of the super block if it has been modified. 1550 * 1551 * Note: we are always called with the filesystem marked `MPBUSY'. 1552 */ 1553 int 1554 ffs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1555 { 1556 struct vnode *vp, *mvp, *nvp; 1557 struct inode *ip; 1558 struct ufsmount *ump = VFSTOUFS(mp); 1559 struct fs *fs; 1560 int lk_flags, error, allerror = 0; 1561 bool is_suspending; 1562 1563 fs = ump->um_fs; 1564 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1565 printf("fs = %s\n", fs->fs_fsmnt); 1566 panic("update: rofs mod"); 1567 } 1568 1569 /* Allocate a marker vnode. */ 1570 if ((mvp = vnalloc(mp)) == NULL) 1571 return (ENOMEM); 1572 1573 fstrans_start(mp, FSTRANS_SHARED); 1574 is_suspending = (fstrans_getstate(mp) == FSTRANS_SUSPENDING); 1575 /* 1576 * We can't lock vnodes while the file system is suspending because 1577 * threads waiting on fstrans may have locked vnodes. 1578 */ 1579 if (is_suspending) 1580 lk_flags = LK_INTERLOCK; 1581 else 1582 lk_flags = LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK; 1583 /* 1584 * Write back each (modified) inode. 1585 */ 1586 mutex_enter(&mntvnode_lock); 1587 loop: 1588 /* 1589 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 1590 * and vclean() can be called indirectly 1591 */ 1592 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = nvp) { 1593 nvp = TAILQ_NEXT(vp, v_mntvnodes); 1594 /* 1595 * If the vnode that we are about to sync is no longer 1596 * associated with this mount point, start over. 1597 */ 1598 if (vp->v_mount != mp) 1599 goto loop; 1600 /* 1601 * Don't interfere with concurrent scans of this FS. 1602 */ 1603 if (vismarker(vp)) 1604 continue; 1605 mutex_enter(&vp->v_interlock); 1606 ip = VTOI(vp); 1607 1608 /* 1609 * Skip the vnode/inode if inaccessible. 1610 */ 1611 if (ip == NULL || (vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0 || 1612 vp->v_type == VNON) { 1613 mutex_exit(&vp->v_interlock); 1614 continue; 1615 } 1616 1617 /* 1618 * We deliberately update inode times here. This will 1619 * prevent a massive queue of updates accumulating, only 1620 * to be handled by a call to unmount. 1621 * 1622 * XXX It would be better to have the syncer trickle these 1623 * out. Adjustment needed to allow registering vnodes for 1624 * sync when the vnode is clean, but the inode dirty. Or 1625 * have ufs itself trickle out inode updates. 1626 * 1627 * If doing a lazy sync, we don't care about metadata or 1628 * data updates, because they are handled by each vnode's 1629 * synclist entry. In this case we are only interested in 1630 * writing back modified inodes. 1631 */ 1632 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | 1633 IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) == 0 && 1634 (waitfor == MNT_LAZY || (LIST_EMPTY(&vp->v_dirtyblkhd) && 1635 UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) { 1636 mutex_exit(&vp->v_interlock); 1637 continue; 1638 } 1639 if (vp->v_type == VBLK && is_suspending) { 1640 mutex_exit(&vp->v_interlock); 1641 continue; 1642 } 1643 vmark(mvp, vp); 1644 mutex_exit(&mntvnode_lock); 1645 error = vget(vp, lk_flags); 1646 if (error) { 1647 mutex_enter(&mntvnode_lock); 1648 nvp = vunmark(mvp); 1649 if (error == ENOENT) { 1650 goto loop; 1651 } 1652 continue; 1653 } 1654 if (waitfor == MNT_LAZY) { 1655 error = UFS_WAPBL_BEGIN(vp->v_mount); 1656 if (!error) { 1657 error = ffs_update(vp, NULL, NULL, 1658 UPDATE_CLOSE); 1659 UFS_WAPBL_END(vp->v_mount); 1660 } 1661 } else { 1662 error = VOP_FSYNC(vp, cred, FSYNC_NOLOG | 1663 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0), 0, 0); 1664 } 1665 if (error) 1666 allerror = error; 1667 if (is_suspending) 1668 vrele(vp); 1669 else 1670 vput(vp); 1671 mutex_enter(&mntvnode_lock); 1672 nvp = vunmark(mvp); 1673 } 1674 mutex_exit(&mntvnode_lock); 1675 /* 1676 * Force stale file system control information to be flushed. 1677 */ 1678 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 || 1679 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) { 1680 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1681 if ((error = VOP_FSYNC(ump->um_devvp, cred, 1682 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0) | FSYNC_NOLOG, 1683 0, 0)) != 0) 1684 allerror = error; 1685 VOP_UNLOCK(ump->um_devvp, 0); 1686 if (allerror == 0 && waitfor == MNT_WAIT && !mp->mnt_wapbl) { 1687 mutex_enter(&mntvnode_lock); 1688 goto loop; 1689 } 1690 } 1691 #ifdef QUOTA 1692 qsync(mp); 1693 #endif 1694 /* 1695 * Write back modified superblock. 1696 */ 1697 if (fs->fs_fmod != 0) { 1698 fs->fs_fmod = 0; 1699 fs->fs_time = time_second; 1700 error = UFS_WAPBL_BEGIN(mp); 1701 if (error) 1702 allerror = error; 1703 else { 1704 if ((error = ffs_cgupdate(ump, waitfor))) 1705 allerror = error; 1706 UFS_WAPBL_END(mp); 1707 } 1708 } 1709 1710 #ifdef WAPBL 1711 if (mp->mnt_wapbl) { 1712 error = wapbl_flush(mp->mnt_wapbl, 0); 1713 if (error) 1714 allerror = error; 1715 } 1716 #endif 1717 1718 fstrans_done(mp); 1719 vnfree(mvp); 1720 return (allerror); 1721 } 1722 1723 /* 1724 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1725 * in from disk. If it is in core, wait for the lock bit to clear, then 1726 * return the inode locked. Detection and handling of mount points must be 1727 * done by the calling routine. 1728 */ 1729 int 1730 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1731 { 1732 struct fs *fs; 1733 struct inode *ip; 1734 struct ufsmount *ump; 1735 struct buf *bp; 1736 struct vnode *vp; 1737 dev_t dev; 1738 int error; 1739 1740 ump = VFSTOUFS(mp); 1741 dev = ump->um_dev; 1742 1743 retry: 1744 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1745 return (0); 1746 1747 /* Allocate a new vnode/inode. */ 1748 if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) { 1749 *vpp = NULL; 1750 return (error); 1751 } 1752 ip = pool_cache_get(ffs_inode_cache, PR_WAITOK); 1753 1754 /* 1755 * If someone beat us to it, put back the freshly allocated 1756 * vnode/inode pair and retry. 1757 */ 1758 mutex_enter(&ufs_hashlock); 1759 if (ufs_ihashget(dev, ino, 0) != NULL) { 1760 mutex_exit(&ufs_hashlock); 1761 ungetnewvnode(vp); 1762 pool_cache_put(ffs_inode_cache, ip); 1763 goto retry; 1764 } 1765 1766 vp->v_vflag |= VV_LOCKSWORK; 1767 1768 #ifdef XIP 1769 if ((vp->v_mount->mnt_iflag & IMNT_XIP) != 0) { 1770 vp->v_vflag |= VV_XIP; 1771 } 1772 #endif 1773 1774 /* 1775 * XXX MFS ends up here, too, to allocate an inode. Should we 1776 * XXX create another pool for MFS inodes? 1777 */ 1778 1779 memset(ip, 0, sizeof(struct inode)); 1780 vp->v_data = ip; 1781 ip->i_vnode = vp; 1782 ip->i_ump = ump; 1783 ip->i_fs = fs = ump->um_fs; 1784 ip->i_dev = dev; 1785 ip->i_number = ino; 1786 #ifdef QUOTA 1787 ufsquota_init(ip); 1788 #endif 1789 1790 /* 1791 * Initialize genfs node, we might proceed to destroy it in 1792 * error branches. 1793 */ 1794 genfs_node_init(vp, &ffs_genfsops); 1795 1796 /* 1797 * Put it onto its hash chain and lock it so that other requests for 1798 * this inode will block if they arrive while we are sleeping waiting 1799 * for old data structures to be purged or for the contents of the 1800 * disk portion of this inode to be read. 1801 */ 1802 1803 ufs_ihashins(ip); 1804 mutex_exit(&ufs_hashlock); 1805 1806 /* Read in the disk contents for the inode, copy into the inode. */ 1807 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1808 (int)fs->fs_bsize, NOCRED, 0, &bp); 1809 if (error) { 1810 1811 /* 1812 * The inode does not contain anything useful, so it would 1813 * be misleading to leave it on its hash chain. With mode 1814 * still zero, it will be unlinked and returned to the free 1815 * list by vput(). 1816 */ 1817 1818 vput(vp); 1819 brelse(bp, 0); 1820 *vpp = NULL; 1821 return (error); 1822 } 1823 if (ip->i_ump->um_fstype == UFS1) 1824 ip->i_din.ffs1_din = pool_cache_get(ffs_dinode1_cache, 1825 PR_WAITOK); 1826 else 1827 ip->i_din.ffs2_din = pool_cache_get(ffs_dinode2_cache, 1828 PR_WAITOK); 1829 ffs_load_inode(bp, ip, fs, ino); 1830 brelse(bp, 0); 1831 1832 /* 1833 * Initialize the vnode from the inode, check for aliases. 1834 * Note that the underlying vnode may have changed. 1835 */ 1836 1837 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1838 1839 /* 1840 * Finish inode initialization now that aliasing has been resolved. 1841 */ 1842 1843 ip->i_devvp = ump->um_devvp; 1844 vref(ip->i_devvp); 1845 1846 /* 1847 * Ensure that uid and gid are correct. This is a temporary 1848 * fix until fsck has been changed to do the update. 1849 */ 1850 1851 if (fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1852 ip->i_uid = ip->i_ffs1_ouid; /* XXX */ 1853 ip->i_gid = ip->i_ffs1_ogid; /* XXX */ 1854 } /* XXX */ 1855 uvm_vnp_setsize(vp, ip->i_size); 1856 *vpp = vp; 1857 return (0); 1858 } 1859 1860 /* 1861 * File handle to vnode 1862 * 1863 * Have to be really careful about stale file handles: 1864 * - check that the inode number is valid 1865 * - call ffs_vget() to get the locked inode 1866 * - check for an unallocated inode (i_mode == 0) 1867 * - check that the given client host has export rights and return 1868 * those rights via. exflagsp and credanonp 1869 */ 1870 int 1871 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1872 { 1873 struct ufid ufh; 1874 struct fs *fs; 1875 1876 if (fhp->fid_len != sizeof(struct ufid)) 1877 return EINVAL; 1878 1879 memcpy(&ufh, fhp, sizeof(ufh)); 1880 fs = VFSTOUFS(mp)->um_fs; 1881 if (ufh.ufid_ino < ROOTINO || 1882 ufh.ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1883 return (ESTALE); 1884 return (ufs_fhtovp(mp, &ufh, vpp)); 1885 } 1886 1887 /* 1888 * Vnode pointer to File handle 1889 */ 1890 /* ARGSUSED */ 1891 int 1892 ffs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1893 { 1894 struct inode *ip; 1895 struct ufid ufh; 1896 1897 if (*fh_size < sizeof(struct ufid)) { 1898 *fh_size = sizeof(struct ufid); 1899 return E2BIG; 1900 } 1901 ip = VTOI(vp); 1902 *fh_size = sizeof(struct ufid); 1903 memset(&ufh, 0, sizeof(ufh)); 1904 ufh.ufid_len = sizeof(struct ufid); 1905 ufh.ufid_ino = ip->i_number; 1906 ufh.ufid_gen = ip->i_gen; 1907 memcpy(fhp, &ufh, sizeof(ufh)); 1908 return (0); 1909 } 1910 1911 void 1912 ffs_init(void) 1913 { 1914 if (ffs_initcount++ > 0) 1915 return; 1916 1917 ffs_inode_cache = pool_cache_init(sizeof(struct inode), 0, 0, 0, 1918 "ffsino", NULL, IPL_NONE, NULL, NULL, NULL); 1919 ffs_dinode1_cache = pool_cache_init(sizeof(struct ufs1_dinode), 0, 0, 0, 1920 "ffsdino1", NULL, IPL_NONE, NULL, NULL, NULL); 1921 ffs_dinode2_cache = pool_cache_init(sizeof(struct ufs2_dinode), 0, 0, 0, 1922 "ffsdino2", NULL, IPL_NONE, NULL, NULL, NULL); 1923 ufs_init(); 1924 } 1925 1926 void 1927 ffs_reinit(void) 1928 { 1929 1930 ufs_reinit(); 1931 } 1932 1933 void 1934 ffs_done(void) 1935 { 1936 if (--ffs_initcount > 0) 1937 return; 1938 1939 ufs_done(); 1940 pool_cache_destroy(ffs_dinode2_cache); 1941 pool_cache_destroy(ffs_dinode1_cache); 1942 pool_cache_destroy(ffs_inode_cache); 1943 } 1944 1945 /* 1946 * Write a superblock and associated information back to disk. 1947 */ 1948 int 1949 ffs_sbupdate(struct ufsmount *mp, int waitfor) 1950 { 1951 struct fs *fs = mp->um_fs; 1952 struct buf *bp; 1953 int error = 0; 1954 u_int32_t saveflag; 1955 1956 error = ffs_getblk(mp->um_devvp, 1957 fs->fs_sblockloc / DEV_BSIZE, FFS_NOBLK, 1958 fs->fs_sbsize, false, &bp); 1959 if (error) 1960 return error; 1961 saveflag = fs->fs_flags & FS_INTERNAL; 1962 fs->fs_flags &= ~FS_INTERNAL; 1963 1964 memcpy(bp->b_data, fs, fs->fs_sbsize); 1965 1966 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1967 #ifdef FFS_EI 1968 if (mp->um_flags & UFS_NEEDSWAP) 1969 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data); 1970 #endif 1971 fs->fs_flags |= saveflag; 1972 1973 if (waitfor == MNT_WAIT) 1974 error = bwrite(bp); 1975 else 1976 bawrite(bp); 1977 return (error); 1978 } 1979 1980 int 1981 ffs_cgupdate(struct ufsmount *mp, int waitfor) 1982 { 1983 struct fs *fs = mp->um_fs; 1984 struct buf *bp; 1985 int blks; 1986 void *space; 1987 int i, size, error = 0, allerror = 0; 1988 1989 allerror = ffs_sbupdate(mp, waitfor); 1990 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1991 space = fs->fs_csp; 1992 for (i = 0; i < blks; i += fs->fs_frag) { 1993 size = fs->fs_bsize; 1994 if (i + fs->fs_frag > blks) 1995 size = (blks - i) * fs->fs_fsize; 1996 error = ffs_getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1997 FFS_NOBLK, size, false, &bp); 1998 if (error) 1999 break; 2000 #ifdef FFS_EI 2001 if (mp->um_flags & UFS_NEEDSWAP) 2002 ffs_csum_swap((struct csum*)space, 2003 (struct csum*)bp->b_data, size); 2004 else 2005 #endif 2006 memcpy(bp->b_data, space, (u_int)size); 2007 space = (char *)space + size; 2008 if (waitfor == MNT_WAIT) 2009 error = bwrite(bp); 2010 else 2011 bawrite(bp); 2012 } 2013 if (!allerror && error) 2014 allerror = error; 2015 return (allerror); 2016 } 2017 2018 int 2019 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2020 int attrnamespace, const char *attrname) 2021 { 2022 #ifdef UFS_EXTATTR 2023 /* 2024 * File-backed extended attributes are only supported on UFS1. 2025 * UFS2 has native extended attributes. 2026 */ 2027 if (VFSTOUFS(mp)->um_fstype == UFS1) 2028 return (ufs_extattrctl(mp, cmd, vp, attrnamespace, attrname)); 2029 #endif 2030 return (vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname)); 2031 } 2032 2033 int 2034 ffs_suspendctl(struct mount *mp, int cmd) 2035 { 2036 int error; 2037 struct lwp *l = curlwp; 2038 2039 switch (cmd) { 2040 case SUSPEND_SUSPEND: 2041 if ((error = fstrans_setstate(mp, FSTRANS_SUSPENDING)) != 0) 2042 return error; 2043 error = ffs_sync(mp, MNT_WAIT, l->l_proc->p_cred); 2044 if (error == 0) 2045 error = fstrans_setstate(mp, FSTRANS_SUSPENDED); 2046 #ifdef WAPBL 2047 if (error == 0 && mp->mnt_wapbl) 2048 error = wapbl_flush(mp->mnt_wapbl, 1); 2049 #endif 2050 if (error != 0) { 2051 (void) fstrans_setstate(mp, FSTRANS_NORMAL); 2052 return error; 2053 } 2054 return 0; 2055 2056 case SUSPEND_RESUME: 2057 return fstrans_setstate(mp, FSTRANS_NORMAL); 2058 2059 default: 2060 return EINVAL; 2061 } 2062 } 2063 2064 /* 2065 * Synch vnode for a mounted file system. This is called for foreign 2066 * vnodes, i.e. non-ffs. 2067 */ 2068 static int 2069 ffs_vfs_fsync(vnode_t *vp, int flags) 2070 { 2071 int error, passes, skipmeta, i, pflags; 2072 buf_t *bp, *nbp; 2073 #ifdef WAPBL 2074 struct mount *mp; 2075 #endif 2076 2077 KASSERT(vp->v_type == VBLK); 2078 KASSERT(vp->v_specmountpoint != NULL); 2079 2080 /* 2081 * Flush all dirty data associated with the vnode. 2082 */ 2083 pflags = PGO_ALLPAGES | PGO_CLEANIT; 2084 if ((flags & FSYNC_WAIT) != 0) 2085 pflags |= PGO_SYNCIO; 2086 mutex_enter(&vp->v_interlock); 2087 error = VOP_PUTPAGES(vp, 0, 0, pflags); 2088 if (error) 2089 return error; 2090 2091 #ifdef WAPBL 2092 mp = vp->v_specmountpoint; 2093 if (mp && mp->mnt_wapbl) { 2094 /* 2095 * Don't bother writing out metadata if the syncer is 2096 * making the request. We will let the sync vnode 2097 * write it out in a single burst through a call to 2098 * VFS_SYNC(). 2099 */ 2100 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY | FSYNC_NOLOG)) != 0) 2101 return 0; 2102 2103 /* 2104 * Don't flush the log if the vnode being flushed 2105 * contains no dirty buffers that could be in the log. 2106 */ 2107 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 2108 error = wapbl_flush(mp->mnt_wapbl, 0); 2109 if (error) 2110 return error; 2111 } 2112 2113 if ((flags & FSYNC_WAIT) != 0) { 2114 mutex_enter(&vp->v_interlock); 2115 while (vp->v_numoutput) 2116 cv_wait(&vp->v_cv, &vp->v_interlock); 2117 mutex_exit(&vp->v_interlock); 2118 } 2119 2120 return 0; 2121 } 2122 #endif /* WAPBL */ 2123 2124 /* 2125 * Write out metadata for non-logging file systems. XXX This block 2126 * should be simplified now that softdep is gone. 2127 */ 2128 passes = NIADDR + 1; 2129 skipmeta = 0; 2130 if (flags & FSYNC_WAIT) 2131 skipmeta = 1; 2132 2133 loop: 2134 mutex_enter(&bufcache_lock); 2135 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 2136 bp->b_cflags &= ~BC_SCANNED; 2137 } 2138 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2139 nbp = LIST_NEXT(bp, b_vnbufs); 2140 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 2141 continue; 2142 if ((bp->b_oflags & BO_DELWRI) == 0) 2143 panic("ffs_fsync: not dirty"); 2144 if (skipmeta && bp->b_lblkno < 0) 2145 continue; 2146 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 2147 mutex_exit(&bufcache_lock); 2148 /* 2149 * On our final pass through, do all I/O synchronously 2150 * so that we can find out if our flush is failing 2151 * because of write errors. 2152 */ 2153 if (passes > 0 || !(flags & FSYNC_WAIT)) 2154 (void) bawrite(bp); 2155 else if ((error = bwrite(bp)) != 0) 2156 return (error); 2157 /* 2158 * Since we unlocked during the I/O, we need 2159 * to start from a known point. 2160 */ 2161 mutex_enter(&bufcache_lock); 2162 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 2163 } 2164 mutex_exit(&bufcache_lock); 2165 if (skipmeta) { 2166 skipmeta = 0; 2167 goto loop; 2168 } 2169 2170 if ((flags & FSYNC_WAIT) != 0) { 2171 mutex_enter(&vp->v_interlock); 2172 while (vp->v_numoutput) { 2173 cv_wait(&vp->v_cv, &vp->v_interlock); 2174 } 2175 mutex_exit(&vp->v_interlock); 2176 2177 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 2178 /* 2179 * Block devices associated with filesystems may 2180 * have new I/O requests posted for them even if 2181 * the vnode is locked, so no amount of trying will 2182 * get them clean. Thus we give block devices a 2183 * good effort, then just give up. For all other file 2184 * types, go around and try again until it is clean. 2185 */ 2186 if (passes > 0) { 2187 passes--; 2188 goto loop; 2189 } 2190 #ifdef DIAGNOSTIC 2191 if (vp->v_type != VBLK) 2192 vprint("ffs_fsync: dirty", vp); 2193 #endif 2194 } 2195 } 2196 2197 if (error == 0 && (flags & FSYNC_CACHE) != 0) { 2198 (void)VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE, 2199 kauth_cred_get()); 2200 } 2201 2202 return error; 2203 } 2204
Indexes created Mon Oct 20 20:10:13 GMT 2025