ffs_vfsops.c revision 1.257.2.9
1 /* $NetBSD: ffs_vfsops.c,v 1.257.2.9 2010/09/26 06:35:32 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 1.257.2.9 2010/09/26 06:35:32 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); 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); 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); 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)) { 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 int32_t fsbsize; 833 834 dev = devvp->v_rdev; 835 cred = l ? l->l_cred : NOCRED; 836 837 /* Flush out any old buffers remaining from a previous use. */ 838 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 839 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 840 VOP_UNLOCK(devvp); 841 if (error) 842 return (error); 843 844 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 845 846 bp = NULL; 847 ump = NULL; 848 fs = NULL; 849 sblockloc = 0; 850 fstype = 0; 851 852 error = fstrans_mount(mp); 853 if (error) 854 return error; 855 856 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 857 memset(ump, 0, sizeof *ump); 858 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 859 error = ffs_snapshot_init(ump); 860 if (error) 861 goto out; 862 ump->um_ops = &ffs_ufsops; 863 864 #ifdef WAPBL 865 sbagain: 866 #endif 867 /* 868 * Try reading the superblock in each of its possible locations. 869 */ 870 for (i = 0; ; i++) { 871 if (bp != NULL) { 872 brelse(bp, BC_NOCACHE); 873 bp = NULL; 874 } 875 if (sblock_try[i] == -1) { 876 error = EINVAL; 877 fs = NULL; 878 goto out; 879 } 880 error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, cred, 881 0, &bp); 882 if (error) { 883 fs = NULL; 884 goto out; 885 } 886 fs = (struct fs*)bp->b_data; 887 fsblockloc = sblockloc = sblock_try[i]; 888 if (fs->fs_magic == FS_UFS1_MAGIC) { 889 sbsize = fs->fs_sbsize; 890 fstype = UFS1; 891 fsbsize = fs->fs_bsize; 892 #ifdef FFS_EI 893 needswap = 0; 894 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC)) { 895 sbsize = bswap32(fs->fs_sbsize); 896 fstype = UFS1; 897 fsbsize = bswap32(fs->fs_bsize); 898 needswap = 1; 899 #endif 900 } else if (fs->fs_magic == FS_UFS2_MAGIC) { 901 sbsize = fs->fs_sbsize; 902 fstype = UFS2; 903 fsbsize = fs->fs_bsize; 904 #ifdef FFS_EI 905 needswap = 0; 906 } else if (fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 907 sbsize = bswap32(fs->fs_sbsize); 908 fstype = UFS2; 909 fsbsize = bswap32(fs->fs_bsize); 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 /* Check that we can handle the file system blocksize */ 943 if (fsbsize > MAXBSIZE) { 944 printf("ffs_mountfs: block size (%d) > MAXBSIZE (%d)\n", 945 fsbsize, MAXBSIZE); 946 continue; 947 } 948 949 /* Ok seems to be a good superblock */ 950 break; 951 } 952 953 fs = malloc((u_long)sbsize, M_UFSMNT, M_WAITOK); 954 memcpy(fs, bp->b_data, sbsize); 955 ump->um_fs = fs; 956 957 #ifdef FFS_EI 958 if (needswap) { 959 ffs_sb_swap((struct fs*)bp->b_data, fs); 960 fs->fs_flags |= FS_SWAPPED; 961 } else 962 #endif 963 fs->fs_flags &= ~FS_SWAPPED; 964 965 #ifdef WAPBL 966 if ((mp->mnt_wapbl_replay == 0) && (fs->fs_flags & FS_DOWAPBL)) { 967 error = ffs_wapbl_replay_start(mp, fs, devvp); 968 if (error && (mp->mnt_flag & MNT_FORCE) == 0) 969 goto out; 970 if (!error) { 971 if (!ronly) { 972 /* XXX fsmnt may be stale. */ 973 printf("%s: replaying log to disk\n", 974 fs->fs_fsmnt); 975 error = wapbl_replay_write(mp->mnt_wapbl_replay, 976 devvp); 977 if (error) 978 goto out; 979 wapbl_replay_stop(mp->mnt_wapbl_replay); 980 fs->fs_clean = FS_WASCLEAN; 981 } else { 982 /* XXX fsmnt may be stale */ 983 printf("%s: replaying log to memory\n", 984 fs->fs_fsmnt); 985 } 986 987 /* Force a re-read of the superblock */ 988 brelse(bp, BC_INVAL); 989 bp = NULL; 990 free(fs, M_UFSMNT); 991 fs = NULL; 992 goto sbagain; 993 } 994 } 995 #else /* !WAPBL */ 996 if ((fs->fs_flags & FS_DOWAPBL) && (mp->mnt_flag & MNT_FORCE) == 0) { 997 error = EPERM; 998 goto out; 999 } 1000 #endif /* !WAPBL */ 1001 1002 ffs_oldfscompat_read(fs, ump, sblockloc); 1003 ump->um_maxfilesize = fs->fs_maxfilesize; 1004 1005 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) { 1006 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n", 1007 mp->mnt_stat.f_mntonname, fs->fs_flags, 1008 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting"); 1009 if ((mp->mnt_flag & MNT_FORCE) == 0) { 1010 error = EINVAL; 1011 goto out; 1012 } 1013 } 1014 1015 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1016 fs->fs_pendingblocks = 0; 1017 fs->fs_pendinginodes = 0; 1018 } 1019 1020 ump->um_fstype = fstype; 1021 if (fs->fs_sbsize < SBLOCKSIZE) 1022 brelse(bp, BC_INVAL); 1023 else 1024 brelse(bp, 0); 1025 bp = NULL; 1026 1027 /* First check to see if this is tagged as an Apple UFS filesystem 1028 * in the disklabel 1029 */ 1030 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred) == 0) && 1031 (dpart.part->p_fstype == FS_APPLEUFS)) { 1032 ump->um_flags |= UFS_ISAPPLEUFS; 1033 } 1034 #ifdef APPLE_UFS 1035 else { 1036 /* Manually look for an apple ufs label, and if a valid one 1037 * is found, then treat it like an Apple UFS filesystem anyway 1038 */ 1039 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE), 1040 APPLEUFS_LABEL_SIZE, cred, 0, &bp); 1041 if (error) 1042 goto out; 1043 error = ffs_appleufs_validate(fs->fs_fsmnt, 1044 (struct appleufslabel *)bp->b_data, NULL); 1045 if (error == 0) { 1046 ump->um_flags |= UFS_ISAPPLEUFS; 1047 } 1048 brelse(bp, 0); 1049 bp = NULL; 1050 } 1051 #else 1052 if (ump->um_flags & UFS_ISAPPLEUFS) { 1053 error = EINVAL; 1054 goto out; 1055 } 1056 #endif 1057 1058 #if 0 1059 /* 1060 * XXX This code changes the behaviour of mounting dirty filesystems, to 1061 * XXX require "mount -f ..." to mount them. This doesn't match what 1062 * XXX mount(8) describes and is disabled for now. 1063 */ 1064 /* 1065 * If the file system is not clean, don't allow it to be mounted 1066 * unless MNT_FORCE is specified. (Note: MNT_FORCE is always set 1067 * for the root file system.) 1068 */ 1069 if (fs->fs_flags & FS_DOWAPBL) { 1070 /* 1071 * wapbl normally expects to be FS_WASCLEAN when the FS_DOWAPBL 1072 * bit is set, although there's a window in unmount where it 1073 * could be FS_ISCLEAN 1074 */ 1075 if ((mp->mnt_flag & MNT_FORCE) == 0 && 1076 (fs->fs_clean & (FS_WASCLEAN | FS_ISCLEAN)) == 0) { 1077 error = EPERM; 1078 goto out; 1079 } 1080 } else 1081 if ((fs->fs_clean & FS_ISCLEAN) == 0 && 1082 (mp->mnt_flag & MNT_FORCE) == 0) { 1083 error = EPERM; 1084 goto out; 1085 } 1086 #endif 1087 1088 /* 1089 * verify that we can access the last block in the fs 1090 * if we're mounting read/write. 1091 */ 1092 1093 if (!ronly) { 1094 error = bread(devvp, fsbtodb(fs, fs->fs_size - 1), fs->fs_fsize, 1095 cred, 0, &bp); 1096 if (bp->b_bcount != fs->fs_fsize) 1097 error = EINVAL; 1098 if (error) { 1099 bset = BC_INVAL; 1100 goto out; 1101 } 1102 brelse(bp, BC_INVAL); 1103 bp = NULL; 1104 } 1105 1106 fs->fs_ronly = ronly; 1107 /* Don't bump fs_clean if we're replaying journal */ 1108 if (!((fs->fs_flags & FS_DOWAPBL) && (fs->fs_clean & FS_WASCLEAN))) 1109 if (ronly == 0) { 1110 fs->fs_clean <<= 1; 1111 fs->fs_fmod = 1; 1112 } 1113 bsize = fs->fs_cssize; 1114 blks = howmany(bsize, fs->fs_fsize); 1115 if (fs->fs_contigsumsize > 0) 1116 bsize += fs->fs_ncg * sizeof(int32_t); 1117 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1118 space = malloc((u_long)bsize, M_UFSMNT, M_WAITOK); 1119 fs->fs_csp = space; 1120 for (i = 0; i < blks; i += fs->fs_frag) { 1121 bsize = fs->fs_bsize; 1122 if (i + fs->fs_frag > blks) 1123 bsize = (blks - i) * fs->fs_fsize; 1124 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize, 1125 cred, 0, &bp); 1126 if (error) { 1127 free(fs->fs_csp, M_UFSMNT); 1128 goto out; 1129 } 1130 #ifdef FFS_EI 1131 if (needswap) 1132 ffs_csum_swap((struct csum *)bp->b_data, 1133 (struct csum *)space, bsize); 1134 else 1135 #endif 1136 memcpy(space, bp->b_data, (u_int)bsize); 1137 1138 space = (char *)space + bsize; 1139 brelse(bp, 0); 1140 bp = NULL; 1141 } 1142 if (fs->fs_contigsumsize > 0) { 1143 fs->fs_maxcluster = lp = space; 1144 for (i = 0; i < fs->fs_ncg; i++) 1145 *lp++ = fs->fs_contigsumsize; 1146 space = lp; 1147 } 1148 bsize = fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1149 fs->fs_contigdirs = space; 1150 space = (char *)space + bsize; 1151 memset(fs->fs_contigdirs, 0, bsize); 1152 /* Compatibility for old filesystems - XXX */ 1153 if (fs->fs_avgfilesize <= 0) 1154 fs->fs_avgfilesize = AVFILESIZ; 1155 if (fs->fs_avgfpdir <= 0) 1156 fs->fs_avgfpdir = AFPDIR; 1157 fs->fs_active = NULL; 1158 mp->mnt_data = ump; 1159 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1160 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS); 1161 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1162 mp->mnt_stat.f_namemax = FFS_MAXNAMLEN; 1163 if (UFS_MPISAPPLEUFS(ump)) { 1164 /* NeXT used to keep short symlinks in the inode even 1165 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen 1166 * is probably -1, but we still need to be able to identify 1167 * short symlinks. 1168 */ 1169 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 1170 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 1171 mp->mnt_iflag |= IMNT_DTYPE; 1172 } else { 1173 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 1174 ump->um_dirblksiz = DIRBLKSIZ; 1175 if (ump->um_maxsymlinklen > 0) 1176 mp->mnt_iflag |= IMNT_DTYPE; 1177 else 1178 mp->mnt_iflag &= ~IMNT_DTYPE; 1179 } 1180 mp->mnt_fs_bshift = fs->fs_bshift; 1181 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 1182 mp->mnt_flag |= MNT_LOCAL; 1183 mp->mnt_iflag |= IMNT_MPSAFE; 1184 #ifdef XIP 1185 if ((mp->mnt_flag & MNT_RDONLY) == 0) 1186 printf("XIP needs read-only mount\n"); 1187 else { 1188 void *physseg = NULL; 1189 1190 if ((VOP_IOCTL(devvp, DIOCGPHYSSEG, &physseg, FREAD, 1191 cred) == 0) && 1192 physseg != NULL) { 1193 mp->mnt_iflag |= IMNT_XIP; 1194 devvp->v_physseg = physseg; 1195 } else 1196 printf("device doesn't support DIOCGPHYSSEG\n"); 1197 } 1198 #endif 1199 #ifdef FFS_EI 1200 if (needswap) 1201 ump->um_flags |= UFS_NEEDSWAP; 1202 #endif 1203 ump->um_mountp = mp; 1204 ump->um_dev = dev; 1205 ump->um_devvp = devvp; 1206 ump->um_nindir = fs->fs_nindir; 1207 ump->um_lognindir = ffs(fs->fs_nindir) - 1; 1208 ump->um_bptrtodb = fs->fs_fshift - DEV_BSHIFT; 1209 ump->um_seqinc = fs->fs_frag; 1210 for (i = 0; i < MAXQUOTAS; i++) 1211 ump->um_quotas[i] = NULLVP; 1212 devvp->v_specmountpoint = mp; 1213 if (ronly == 0 && fs->fs_snapinum[0] != 0) 1214 ffs_snapshot_mount(mp); 1215 1216 #ifdef WAPBL 1217 if (!ronly) { 1218 KDASSERT(fs->fs_ronly == 0); 1219 /* 1220 * ffs_wapbl_start() needs mp->mnt_stat initialised if it 1221 * needs to create a new log file in-filesystem. 1222 */ 1223 ffs_statvfs(mp, &mp->mnt_stat); 1224 1225 error = ffs_wapbl_start(mp); 1226 if (error) { 1227 free(fs->fs_csp, M_UFSMNT); 1228 goto out; 1229 } 1230 } 1231 #endif /* WAPBL */ 1232 #ifdef UFS_EXTATTR 1233 /* 1234 * Initialize file-backed extended attributes on UFS1 file 1235 * systems. 1236 */ 1237 if (ump->um_fstype == UFS1) { 1238 ufs_extattr_uepm_init(&ump->um_extattr); 1239 #ifdef UFS_EXTATTR_AUTOSTART 1240 /* 1241 * XXX Just ignore errors. Not clear that we should 1242 * XXX fail the mount in this case. 1243 */ 1244 (void) ufs_extattr_autostart(mp, l); 1245 #endif 1246 } 1247 #endif /* UFS_EXTATTR */ 1248 return (0); 1249 out: 1250 #ifdef WAPBL 1251 if (mp->mnt_wapbl_replay) { 1252 wapbl_replay_stop(mp->mnt_wapbl_replay); 1253 wapbl_replay_free(mp->mnt_wapbl_replay); 1254 mp->mnt_wapbl_replay = 0; 1255 } 1256 #endif 1257 1258 fstrans_unmount(mp); 1259 if (fs) 1260 free(fs, M_UFSMNT); 1261 devvp->v_specmountpoint = NULL; 1262 if (bp) 1263 brelse(bp, bset); 1264 if (ump) { 1265 if (ump->um_oldfscompat) 1266 free(ump->um_oldfscompat, M_UFSMNT); 1267 mutex_destroy(&ump->um_lock); 1268 free(ump, M_UFSMNT); 1269 mp->mnt_data = NULL; 1270 } 1271 return (error); 1272 } 1273 1274 /* 1275 * Sanity checks for loading old filesystem superblocks. 1276 * See ffs_oldfscompat_write below for unwound actions. 1277 * 1278 * XXX - Parts get retired eventually. 1279 * Unfortunately new bits get added. 1280 */ 1281 static void 1282 ffs_oldfscompat_read(struct fs *fs, struct ufsmount *ump, daddr_t sblockloc) 1283 { 1284 off_t maxfilesize; 1285 int32_t *extrasave; 1286 1287 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1288 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1289 return; 1290 1291 if (!ump->um_oldfscompat) 1292 ump->um_oldfscompat = malloc(512 + 3*sizeof(int32_t), 1293 M_UFSMNT, M_WAITOK); 1294 1295 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512); 1296 extrasave = ump->um_oldfscompat; 1297 extrasave += 512/sizeof(int32_t); 1298 extrasave[0] = fs->fs_old_npsect; 1299 extrasave[1] = fs->fs_old_interleave; 1300 extrasave[2] = fs->fs_old_trackskew; 1301 1302 /* These fields will be overwritten by their 1303 * original values in fs_oldfscompat_write, so it is harmless 1304 * to modify them here. 1305 */ 1306 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1307 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1308 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1309 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1310 1311 fs->fs_maxbsize = fs->fs_bsize; 1312 fs->fs_time = fs->fs_old_time; 1313 fs->fs_size = fs->fs_old_size; 1314 fs->fs_dsize = fs->fs_old_dsize; 1315 fs->fs_csaddr = fs->fs_old_csaddr; 1316 fs->fs_sblockloc = sblockloc; 1317 1318 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL); 1319 1320 if (fs->fs_old_postblformat == FS_42POSTBLFMT) { 1321 fs->fs_old_nrpos = 8; 1322 fs->fs_old_npsect = fs->fs_old_nsect; 1323 fs->fs_old_interleave = 1; 1324 fs->fs_old_trackskew = 0; 1325 } 1326 1327 if (fs->fs_old_inodefmt < FS_44INODEFMT) { 1328 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 1329 fs->fs_qbmask = ~fs->fs_bmask; 1330 fs->fs_qfmask = ~fs->fs_fmask; 1331 } 1332 1333 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1; 1334 if (fs->fs_maxfilesize > maxfilesize) 1335 fs->fs_maxfilesize = maxfilesize; 1336 1337 /* Compatibility for old filesystems */ 1338 if (fs->fs_avgfilesize <= 0) 1339 fs->fs_avgfilesize = AVFILESIZ; 1340 if (fs->fs_avgfpdir <= 0) 1341 fs->fs_avgfpdir = AFPDIR; 1342 1343 #if 0 1344 if (bigcgs) { 1345 fs->fs_save_cgsize = fs->fs_cgsize; 1346 fs->fs_cgsize = fs->fs_bsize; 1347 } 1348 #endif 1349 } 1350 1351 /* 1352 * Unwinding superblock updates for old filesystems. 1353 * See ffs_oldfscompat_read above for details. 1354 * 1355 * XXX - Parts get retired eventually. 1356 * Unfortunately new bits get added. 1357 */ 1358 static void 1359 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump) 1360 { 1361 int32_t *extrasave; 1362 1363 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1364 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1365 return; 1366 1367 fs->fs_old_time = fs->fs_time; 1368 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1369 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1370 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1371 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1372 fs->fs_old_flags = fs->fs_flags; 1373 1374 #if 0 1375 if (bigcgs) { 1376 fs->fs_cgsize = fs->fs_save_cgsize; 1377 } 1378 #endif 1379 1380 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512); 1381 extrasave = ump->um_oldfscompat; 1382 extrasave += 512/sizeof(int32_t); 1383 fs->fs_old_npsect = extrasave[0]; 1384 fs->fs_old_interleave = extrasave[1]; 1385 fs->fs_old_trackskew = extrasave[2]; 1386 1387 } 1388 1389 /* 1390 * unmount vfs operation 1391 */ 1392 int 1393 ffs_unmount(struct mount *mp, int mntflags) 1394 { 1395 struct lwp *l = curlwp; 1396 struct ufsmount *ump = VFSTOUFS(mp); 1397 struct fs *fs = ump->um_fs; 1398 int error, flags; 1399 #ifdef WAPBL 1400 extern int doforce; 1401 #endif 1402 1403 flags = 0; 1404 if (mntflags & MNT_FORCE) 1405 flags |= FORCECLOSE; 1406 if ((error = ffs_flushfiles(mp, flags, l)) != 0) 1407 return (error); 1408 error = UFS_WAPBL_BEGIN(mp); 1409 if (error == 0) 1410 if (fs->fs_ronly == 0 && 1411 ffs_cgupdate(ump, MNT_WAIT) == 0 && 1412 fs->fs_clean & FS_WASCLEAN) { 1413 fs->fs_clean = FS_ISCLEAN; 1414 fs->fs_fmod = 0; 1415 (void) ffs_sbupdate(ump, MNT_WAIT); 1416 } 1417 if (error == 0) 1418 UFS_WAPBL_END(mp); 1419 #ifdef WAPBL 1420 KASSERT(!(mp->mnt_wapbl_replay && mp->mnt_wapbl)); 1421 if (mp->mnt_wapbl_replay) { 1422 KDASSERT(fs->fs_ronly); 1423 wapbl_replay_stop(mp->mnt_wapbl_replay); 1424 wapbl_replay_free(mp->mnt_wapbl_replay); 1425 mp->mnt_wapbl_replay = 0; 1426 } 1427 error = ffs_wapbl_stop(mp, doforce && (mntflags & MNT_FORCE)); 1428 if (error) { 1429 return error; 1430 } 1431 #endif /* WAPBL */ 1432 #ifdef UFS_EXTATTR 1433 if (ump->um_fstype == UFS1) { 1434 ufs_extattr_stop(mp, l); 1435 ufs_extattr_uepm_destroy(&ump->um_extattr); 1436 } 1437 #endif /* UFS_EXTATTR */ 1438 1439 if (ump->um_devvp->v_type != VBAD) 1440 ump->um_devvp->v_specmountpoint = NULL; 1441 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1442 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE, 1443 NOCRED); 1444 vput(ump->um_devvp); 1445 free(fs->fs_csp, M_UFSMNT); 1446 free(fs, M_UFSMNT); 1447 if (ump->um_oldfscompat != NULL) 1448 free(ump->um_oldfscompat, M_UFSMNT); 1449 mutex_destroy(&ump->um_lock); 1450 ffs_snapshot_fini(ump); 1451 free(ump, M_UFSMNT); 1452 mp->mnt_data = NULL; 1453 mp->mnt_flag &= ~MNT_LOCAL; 1454 fstrans_unmount(mp); 1455 return (0); 1456 } 1457 1458 /* 1459 * Flush out all the files in a filesystem. 1460 */ 1461 int 1462 ffs_flushfiles(struct mount *mp, int flags, struct lwp *l) 1463 { 1464 extern int doforce; 1465 struct ufsmount *ump; 1466 int error; 1467 1468 if (!doforce) 1469 flags &= ~FORCECLOSE; 1470 ump = VFSTOUFS(mp); 1471 #ifdef QUOTA 1472 if (mp->mnt_flag & MNT_QUOTA) { 1473 int i; 1474 if ((error = vflush(mp, NULLVP, SKIPSYSTEM | flags)) != 0) 1475 return (error); 1476 for (i = 0; i < MAXQUOTAS; i++) { 1477 if (ump->um_quotas[i] == NULLVP) 1478 continue; 1479 quotaoff(l, mp, i); 1480 } 1481 /* 1482 * Here we fall through to vflush again to ensure 1483 * that we have gotten rid of all the system vnodes. 1484 */ 1485 } 1486 #endif 1487 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1488 return (error); 1489 ffs_snapshot_unmount(mp); 1490 /* 1491 * Flush all the files. 1492 */ 1493 error = vflush(mp, NULLVP, flags); 1494 if (error) 1495 return (error); 1496 /* 1497 * Flush filesystem metadata. 1498 */ 1499 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1500 error = VOP_FSYNC(ump->um_devvp, l->l_cred, FSYNC_WAIT, 0, 0); 1501 VOP_UNLOCK(ump->um_devvp); 1502 if (flags & FORCECLOSE) /* XXXDBJ */ 1503 error = 0; 1504 1505 #ifdef WAPBL 1506 if (error) 1507 return error; 1508 if (mp->mnt_wapbl) { 1509 error = wapbl_flush(mp->mnt_wapbl, 1); 1510 if (flags & FORCECLOSE) 1511 error = 0; 1512 } 1513 #endif 1514 1515 return (error); 1516 } 1517 1518 /* 1519 * Get file system statistics. 1520 */ 1521 int 1522 ffs_statvfs(struct mount *mp, struct statvfs *sbp) 1523 { 1524 struct ufsmount *ump; 1525 struct fs *fs; 1526 1527 ump = VFSTOUFS(mp); 1528 fs = ump->um_fs; 1529 mutex_enter(&ump->um_lock); 1530 sbp->f_bsize = fs->fs_bsize; 1531 sbp->f_frsize = fs->fs_fsize; 1532 sbp->f_iosize = fs->fs_bsize; 1533 sbp->f_blocks = fs->fs_dsize; 1534 sbp->f_bfree = blkstofrags(fs, fs->fs_cstotal.cs_nbfree) + 1535 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1536 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t) 1537 fs->fs_minfree) / (u_int64_t) 100; 1538 if (sbp->f_bfree > sbp->f_bresvd) 1539 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1540 else 1541 sbp->f_bavail = 0; 1542 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1543 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1544 sbp->f_favail = sbp->f_ffree; 1545 sbp->f_fresvd = 0; 1546 mutex_exit(&ump->um_lock); 1547 copy_statvfs_info(sbp, mp); 1548 1549 return (0); 1550 } 1551 1552 /* 1553 * Go through the disk queues to initiate sandbagged IO; 1554 * go through the inodes to write those that have been modified; 1555 * initiate the writing of the super block if it has been modified. 1556 * 1557 * Note: we are always called with the filesystem marked `MPBUSY'. 1558 */ 1559 int 1560 ffs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1561 { 1562 struct vnode *vp, *mvp, *nvp; 1563 struct inode *ip; 1564 struct ufsmount *ump = VFSTOUFS(mp); 1565 struct fs *fs; 1566 int lk_flags, error, allerror = 0; 1567 bool is_suspending; 1568 1569 fs = ump->um_fs; 1570 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1571 printf("fs = %s\n", fs->fs_fsmnt); 1572 panic("update: rofs mod"); 1573 } 1574 1575 /* Allocate a marker vnode. */ 1576 if ((mvp = vnalloc(mp)) == NULL) 1577 return (ENOMEM); 1578 1579 fstrans_start(mp, FSTRANS_SHARED); 1580 is_suspending = (fstrans_getstate(mp) == FSTRANS_SUSPENDING); 1581 /* 1582 * We can't lock vnodes while the file system is suspending because 1583 * threads waiting on fstrans may have locked vnodes. 1584 */ 1585 if (is_suspending) 1586 lk_flags = 0; 1587 else 1588 lk_flags = LK_EXCLUSIVE | LK_NOWAIT; 1589 /* 1590 * Write back each (modified) inode. 1591 */ 1592 mutex_enter(&mntvnode_lock); 1593 loop: 1594 /* 1595 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 1596 * and vclean() can be called indirectly 1597 */ 1598 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = nvp) { 1599 nvp = TAILQ_NEXT(vp, v_mntvnodes); 1600 /* 1601 * If the vnode that we are about to sync is no longer 1602 * associated with this mount point, start over. 1603 */ 1604 if (vp->v_mount != mp) 1605 goto loop; 1606 /* 1607 * Don't interfere with concurrent scans of this FS. 1608 */ 1609 if (vismarker(vp)) 1610 continue; 1611 mutex_enter(&vp->v_interlock); 1612 ip = VTOI(vp); 1613 1614 /* 1615 * Skip the vnode/inode if inaccessible. 1616 */ 1617 if (ip == NULL || (vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0 || 1618 vp->v_type == VNON) { 1619 mutex_exit(&vp->v_interlock); 1620 continue; 1621 } 1622 1623 /* 1624 * We deliberately update inode times here. This will 1625 * prevent a massive queue of updates accumulating, only 1626 * to be handled by a call to unmount. 1627 * 1628 * XXX It would be better to have the syncer trickle these 1629 * out. Adjustment needed to allow registering vnodes for 1630 * sync when the vnode is clean, but the inode dirty. Or 1631 * have ufs itself trickle out inode updates. 1632 * 1633 * If doing a lazy sync, we don't care about metadata or 1634 * data updates, because they are handled by each vnode's 1635 * synclist entry. In this case we are only interested in 1636 * writing back modified inodes. 1637 */ 1638 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | 1639 IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) == 0 && 1640 (waitfor == MNT_LAZY || (LIST_EMPTY(&vp->v_dirtyblkhd) && 1641 UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) { 1642 mutex_exit(&vp->v_interlock); 1643 continue; 1644 } 1645 if (vp->v_type == VBLK && is_suspending) { 1646 mutex_exit(&vp->v_interlock); 1647 continue; 1648 } 1649 vmark(mvp, vp); 1650 mutex_exit(&mntvnode_lock); 1651 error = vget(vp, lk_flags); 1652 if (error) { 1653 mutex_enter(&mntvnode_lock); 1654 nvp = vunmark(mvp); 1655 if (error == ENOENT) { 1656 goto loop; 1657 } 1658 continue; 1659 } 1660 if (waitfor == MNT_LAZY) { 1661 error = UFS_WAPBL_BEGIN(vp->v_mount); 1662 if (!error) { 1663 error = ffs_update(vp, NULL, NULL, 1664 UPDATE_CLOSE); 1665 UFS_WAPBL_END(vp->v_mount); 1666 } 1667 } else { 1668 error = VOP_FSYNC(vp, cred, FSYNC_NOLOG | 1669 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0), 0, 0); 1670 } 1671 if (error) 1672 allerror = error; 1673 if (is_suspending) 1674 vrele(vp); 1675 else 1676 vput(vp); 1677 mutex_enter(&mntvnode_lock); 1678 nvp = vunmark(mvp); 1679 } 1680 mutex_exit(&mntvnode_lock); 1681 /* 1682 * Force stale file system control information to be flushed. 1683 */ 1684 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 || 1685 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) { 1686 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1687 if ((error = VOP_FSYNC(ump->um_devvp, cred, 1688 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0) | FSYNC_NOLOG, 1689 0, 0)) != 0) 1690 allerror = error; 1691 VOP_UNLOCK(ump->um_devvp); 1692 if (allerror == 0 && waitfor == MNT_WAIT && !mp->mnt_wapbl) { 1693 mutex_enter(&mntvnode_lock); 1694 goto loop; 1695 } 1696 } 1697 #ifdef QUOTA 1698 qsync(mp); 1699 #endif 1700 /* 1701 * Write back modified superblock. 1702 */ 1703 if (fs->fs_fmod != 0) { 1704 fs->fs_fmod = 0; 1705 fs->fs_time = time_second; 1706 error = UFS_WAPBL_BEGIN(mp); 1707 if (error) 1708 allerror = error; 1709 else { 1710 if ((error = ffs_cgupdate(ump, waitfor))) 1711 allerror = error; 1712 UFS_WAPBL_END(mp); 1713 } 1714 } 1715 1716 #ifdef WAPBL 1717 if (mp->mnt_wapbl) { 1718 error = wapbl_flush(mp->mnt_wapbl, 0); 1719 if (error) 1720 allerror = error; 1721 } 1722 #endif 1723 1724 fstrans_done(mp); 1725 vnfree(mvp); 1726 return (allerror); 1727 } 1728 1729 /* 1730 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1731 * in from disk. If it is in core, wait for the lock bit to clear, then 1732 * return the inode locked. Detection and handling of mount points must be 1733 * done by the calling routine. 1734 */ 1735 int 1736 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1737 { 1738 struct fs *fs; 1739 struct inode *ip; 1740 struct ufsmount *ump; 1741 struct buf *bp; 1742 struct vnode *vp; 1743 dev_t dev; 1744 int error; 1745 1746 ump = VFSTOUFS(mp); 1747 dev = ump->um_dev; 1748 1749 retry: 1750 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1751 return (0); 1752 1753 /* Allocate a new vnode/inode. */ 1754 if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) { 1755 *vpp = NULL; 1756 return (error); 1757 } 1758 ip = pool_cache_get(ffs_inode_cache, PR_WAITOK); 1759 1760 /* 1761 * If someone beat us to it, put back the freshly allocated 1762 * vnode/inode pair and retry. 1763 */ 1764 mutex_enter(&ufs_hashlock); 1765 if (ufs_ihashget(dev, ino, 0) != NULL) { 1766 mutex_exit(&ufs_hashlock); 1767 ungetnewvnode(vp); 1768 pool_cache_put(ffs_inode_cache, ip); 1769 goto retry; 1770 } 1771 1772 vp->v_vflag |= VV_LOCKSWORK; 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 #ifdef XIP 1840 if ((vp->v_mount->mnt_iflag & IMNT_XIP) != 0 && 1841 vp->v_type == VREG) { 1842 vp->v_vflag |= VV_XIP; 1843 } 1844 #endif 1845 1846 /* 1847 * Finish inode initialization now that aliasing has been resolved. 1848 */ 1849 1850 ip->i_devvp = ump->um_devvp; 1851 vref(ip->i_devvp); 1852 1853 /* 1854 * Ensure that uid and gid are correct. This is a temporary 1855 * fix until fsck has been changed to do the update. 1856 */ 1857 1858 if (fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1859 ip->i_uid = ip->i_ffs1_ouid; /* XXX */ 1860 ip->i_gid = ip->i_ffs1_ogid; /* XXX */ 1861 } /* XXX */ 1862 uvm_vnp_setsize(vp, ip->i_size); 1863 *vpp = vp; 1864 return (0); 1865 } 1866 1867 /* 1868 * File handle to vnode 1869 * 1870 * Have to be really careful about stale file handles: 1871 * - check that the inode number is valid 1872 * - call ffs_vget() to get the locked inode 1873 * - check for an unallocated inode (i_mode == 0) 1874 * - check that the given client host has export rights and return 1875 * those rights via. exflagsp and credanonp 1876 */ 1877 int 1878 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1879 { 1880 struct ufid ufh; 1881 struct fs *fs; 1882 1883 if (fhp->fid_len != sizeof(struct ufid)) 1884 return EINVAL; 1885 1886 memcpy(&ufh, fhp, sizeof(ufh)); 1887 fs = VFSTOUFS(mp)->um_fs; 1888 if (ufh.ufid_ino < ROOTINO || 1889 ufh.ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1890 return (ESTALE); 1891 return (ufs_fhtovp(mp, &ufh, vpp)); 1892 } 1893 1894 /* 1895 * Vnode pointer to File handle 1896 */ 1897 /* ARGSUSED */ 1898 int 1899 ffs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1900 { 1901 struct inode *ip; 1902 struct ufid ufh; 1903 1904 if (*fh_size < sizeof(struct ufid)) { 1905 *fh_size = sizeof(struct ufid); 1906 return E2BIG; 1907 } 1908 ip = VTOI(vp); 1909 *fh_size = sizeof(struct ufid); 1910 memset(&ufh, 0, sizeof(ufh)); 1911 ufh.ufid_len = sizeof(struct ufid); 1912 ufh.ufid_ino = ip->i_number; 1913 ufh.ufid_gen = ip->i_gen; 1914 memcpy(fhp, &ufh, sizeof(ufh)); 1915 return (0); 1916 } 1917 1918 void 1919 ffs_init(void) 1920 { 1921 if (ffs_initcount++ > 0) 1922 return; 1923 1924 ffs_inode_cache = pool_cache_init(sizeof(struct inode), 0, 0, 0, 1925 "ffsino", NULL, IPL_NONE, NULL, NULL, NULL); 1926 ffs_dinode1_cache = pool_cache_init(sizeof(struct ufs1_dinode), 0, 0, 0, 1927 "ffsdino1", NULL, IPL_NONE, NULL, NULL, NULL); 1928 ffs_dinode2_cache = pool_cache_init(sizeof(struct ufs2_dinode), 0, 0, 0, 1929 "ffsdino2", NULL, IPL_NONE, NULL, NULL, NULL); 1930 ufs_init(); 1931 } 1932 1933 void 1934 ffs_reinit(void) 1935 { 1936 1937 ufs_reinit(); 1938 } 1939 1940 void 1941 ffs_done(void) 1942 { 1943 if (--ffs_initcount > 0) 1944 return; 1945 1946 ufs_done(); 1947 pool_cache_destroy(ffs_dinode2_cache); 1948 pool_cache_destroy(ffs_dinode1_cache); 1949 pool_cache_destroy(ffs_inode_cache); 1950 } 1951 1952 /* 1953 * Write a superblock and associated information back to disk. 1954 */ 1955 int 1956 ffs_sbupdate(struct ufsmount *mp, int waitfor) 1957 { 1958 struct fs *fs = mp->um_fs; 1959 struct buf *bp; 1960 int error = 0; 1961 u_int32_t saveflag; 1962 1963 error = ffs_getblk(mp->um_devvp, 1964 fs->fs_sblockloc / DEV_BSIZE, FFS_NOBLK, 1965 fs->fs_sbsize, false, &bp); 1966 if (error) 1967 return error; 1968 saveflag = fs->fs_flags & FS_INTERNAL; 1969 fs->fs_flags &= ~FS_INTERNAL; 1970 1971 memcpy(bp->b_data, fs, fs->fs_sbsize); 1972 1973 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1974 #ifdef FFS_EI 1975 if (mp->um_flags & UFS_NEEDSWAP) 1976 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data); 1977 #endif 1978 fs->fs_flags |= saveflag; 1979 1980 if (waitfor == MNT_WAIT) 1981 error = bwrite(bp); 1982 else 1983 bawrite(bp); 1984 return (error); 1985 } 1986 1987 int 1988 ffs_cgupdate(struct ufsmount *mp, int waitfor) 1989 { 1990 struct fs *fs = mp->um_fs; 1991 struct buf *bp; 1992 int blks; 1993 void *space; 1994 int i, size, error = 0, allerror = 0; 1995 1996 allerror = ffs_sbupdate(mp, waitfor); 1997 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1998 space = fs->fs_csp; 1999 for (i = 0; i < blks; i += fs->fs_frag) { 2000 size = fs->fs_bsize; 2001 if (i + fs->fs_frag > blks) 2002 size = (blks - i) * fs->fs_fsize; 2003 error = ffs_getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 2004 FFS_NOBLK, size, false, &bp); 2005 if (error) 2006 break; 2007 #ifdef FFS_EI 2008 if (mp->um_flags & UFS_NEEDSWAP) 2009 ffs_csum_swap((struct csum*)space, 2010 (struct csum*)bp->b_data, size); 2011 else 2012 #endif 2013 memcpy(bp->b_data, space, (u_int)size); 2014 space = (char *)space + size; 2015 if (waitfor == MNT_WAIT) 2016 error = bwrite(bp); 2017 else 2018 bawrite(bp); 2019 } 2020 if (!allerror && error) 2021 allerror = error; 2022 return (allerror); 2023 } 2024 2025 int 2026 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2027 int attrnamespace, const char *attrname) 2028 { 2029 #ifdef UFS_EXTATTR 2030 /* 2031 * File-backed extended attributes are only supported on UFS1. 2032 * UFS2 has native extended attributes. 2033 */ 2034 if (VFSTOUFS(mp)->um_fstype == UFS1) 2035 return (ufs_extattrctl(mp, cmd, vp, attrnamespace, attrname)); 2036 #endif 2037 return (vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname)); 2038 } 2039 2040 int 2041 ffs_suspendctl(struct mount *mp, int cmd) 2042 { 2043 int error; 2044 struct lwp *l = curlwp; 2045 2046 switch (cmd) { 2047 case SUSPEND_SUSPEND: 2048 if ((error = fstrans_setstate(mp, FSTRANS_SUSPENDING)) != 0) 2049 return error; 2050 error = ffs_sync(mp, MNT_WAIT, l->l_proc->p_cred); 2051 if (error == 0) 2052 error = fstrans_setstate(mp, FSTRANS_SUSPENDED); 2053 #ifdef WAPBL 2054 if (error == 0 && mp->mnt_wapbl) 2055 error = wapbl_flush(mp->mnt_wapbl, 1); 2056 #endif 2057 if (error != 0) { 2058 (void) fstrans_setstate(mp, FSTRANS_NORMAL); 2059 return error; 2060 } 2061 return 0; 2062 2063 case SUSPEND_RESUME: 2064 return fstrans_setstate(mp, FSTRANS_NORMAL); 2065 2066 default: 2067 return EINVAL; 2068 } 2069 } 2070 2071 /* 2072 * Synch vnode for a mounted file system. This is called for foreign 2073 * vnodes, i.e. non-ffs. 2074 */ 2075 static int 2076 ffs_vfs_fsync(vnode_t *vp, int flags) 2077 { 2078 int error, passes, skipmeta, i, pflags; 2079 buf_t *bp, *nbp; 2080 #ifdef WAPBL 2081 struct mount *mp; 2082 #endif 2083 2084 KASSERT(vp->v_type == VBLK); 2085 KASSERT(vp->v_specmountpoint != NULL); 2086 2087 /* 2088 * Flush all dirty data associated with the vnode. 2089 */ 2090 pflags = PGO_ALLPAGES | PGO_CLEANIT; 2091 if ((flags & FSYNC_WAIT) != 0) 2092 pflags |= PGO_SYNCIO; 2093 mutex_enter(&vp->v_interlock); 2094 error = VOP_PUTPAGES(vp, 0, 0, pflags); 2095 if (error) 2096 return error; 2097 2098 #ifdef WAPBL 2099 mp = vp->v_specmountpoint; 2100 if (mp && mp->mnt_wapbl) { 2101 /* 2102 * Don't bother writing out metadata if the syncer is 2103 * making the request. We will let the sync vnode 2104 * write it out in a single burst through a call to 2105 * VFS_SYNC(). 2106 */ 2107 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY | FSYNC_NOLOG)) != 0) 2108 return 0; 2109 2110 /* 2111 * Don't flush the log if the vnode being flushed 2112 * contains no dirty buffers that could be in the log. 2113 */ 2114 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 2115 error = wapbl_flush(mp->mnt_wapbl, 0); 2116 if (error) 2117 return error; 2118 } 2119 2120 if ((flags & FSYNC_WAIT) != 0) { 2121 mutex_enter(&vp->v_interlock); 2122 while (vp->v_numoutput) 2123 cv_wait(&vp->v_cv, &vp->v_interlock); 2124 mutex_exit(&vp->v_interlock); 2125 } 2126 2127 return 0; 2128 } 2129 #endif /* WAPBL */ 2130 2131 /* 2132 * Write out metadata for non-logging file systems. XXX This block 2133 * should be simplified now that softdep is gone. 2134 */ 2135 passes = NIADDR + 1; 2136 skipmeta = 0; 2137 if (flags & FSYNC_WAIT) 2138 skipmeta = 1; 2139 2140 loop: 2141 mutex_enter(&bufcache_lock); 2142 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 2143 bp->b_cflags &= ~BC_SCANNED; 2144 } 2145 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2146 nbp = LIST_NEXT(bp, b_vnbufs); 2147 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 2148 continue; 2149 if ((bp->b_oflags & BO_DELWRI) == 0) 2150 panic("ffs_fsync: not dirty"); 2151 if (skipmeta && bp->b_lblkno < 0) 2152 continue; 2153 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 2154 mutex_exit(&bufcache_lock); 2155 /* 2156 * On our final pass through, do all I/O synchronously 2157 * so that we can find out if our flush is failing 2158 * because of write errors. 2159 */ 2160 if (passes > 0 || !(flags & FSYNC_WAIT)) 2161 (void) bawrite(bp); 2162 else if ((error = bwrite(bp)) != 0) 2163 return (error); 2164 /* 2165 * Since we unlocked during the I/O, we need 2166 * to start from a known point. 2167 */ 2168 mutex_enter(&bufcache_lock); 2169 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 2170 } 2171 mutex_exit(&bufcache_lock); 2172 if (skipmeta) { 2173 skipmeta = 0; 2174 goto loop; 2175 } 2176 2177 if ((flags & FSYNC_WAIT) != 0) { 2178 mutex_enter(&vp->v_interlock); 2179 while (vp->v_numoutput) { 2180 cv_wait(&vp->v_cv, &vp->v_interlock); 2181 } 2182 mutex_exit(&vp->v_interlock); 2183 2184 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 2185 /* 2186 * Block devices associated with filesystems may 2187 * have new I/O requests posted for them even if 2188 * the vnode is locked, so no amount of trying will 2189 * get them clean. Thus we give block devices a 2190 * good effort, then just give up. For all other file 2191 * types, go around and try again until it is clean. 2192 */ 2193 if (passes > 0) { 2194 passes--; 2195 goto loop; 2196 } 2197 #ifdef DIAGNOSTIC 2198 if (vp->v_type != VBLK) 2199 vprint("ffs_fsync: dirty", vp); 2200 #endif 2201 } 2202 } 2203 2204 if (error == 0 && (flags & FSYNC_CACHE) != 0) { 2205 (void)VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE, 2206 kauth_cred_get()); 2207 } 2208 2209 return error; 2210 } 2211
Indexes created Sat Oct 18 17:09:52 GMT 2025