1 /*- 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_quota.h" 36 #include "opt_ufs.h" 37 #include "opt_ffs.h" 38 #include "opt_ddb.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/conf.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/mutex.h> 54 55 #include <security/mac/mac_framework.h> 56 57 #include <ufs/ufs/extattr.h> 58 #include <ufs/ufs/gjournal.h> 59 #include <ufs/ufs/quota.h> 60 #include <ufs/ufs/ufsmount.h> 61 #include <ufs/ufs/inode.h> 62 #include <ufs/ufs/ufs_extern.h> 63 64 #include <ufs/ffs/fs.h> 65 #include <ufs/ffs/ffs_extern.h> 66 67 #include <vm/vm.h> 68 #include <vm/uma.h> 69 #include <vm/vm_page.h> 70 71 #include <geom/geom.h> 72 #include <geom/geom_vfs.h> 73 74 #include <ddb/ddb.h> 75 76 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 77 78 static int ffs_reload(struct mount *, struct thread *); 79 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 80 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 81 ufs2_daddr_t); 82 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 83 static int ffs_sync_lazy(struct mount *mp); 84 85 static vfs_init_t ffs_init; 86 static vfs_uninit_t ffs_uninit; 87 static vfs_extattrctl_t ffs_extattrctl; 88 static vfs_cmount_t ffs_cmount; 89 static vfs_unmount_t ffs_unmount; 90 static vfs_mount_t ffs_mount; 91 static vfs_statfs_t ffs_statfs; 92 static vfs_fhtovp_t ffs_fhtovp; 93 static vfs_sync_t ffs_sync; 94 95 static struct vfsops ufs_vfsops = { 96 .vfs_extattrctl = ffs_extattrctl, 97 .vfs_fhtovp = ffs_fhtovp, 98 .vfs_init = ffs_init, 99 .vfs_mount = ffs_mount, 100 .vfs_cmount = ffs_cmount, 101 .vfs_quotactl = ufs_quotactl, 102 .vfs_root = ufs_root, 103 .vfs_statfs = ffs_statfs, 104 .vfs_sync = ffs_sync, 105 .vfs_uninit = ffs_uninit, 106 .vfs_unmount = ffs_unmount, 107 .vfs_vget = ffs_vget, 108 .vfs_susp_clean = process_deferred_inactive, 109 }; 110 111 VFS_SET(ufs_vfsops, ufs, 0); 112 MODULE_VERSION(ufs, 1); 113 114 static b_strategy_t ffs_geom_strategy; 115 static b_write_t ffs_bufwrite; 116 117 static struct buf_ops ffs_ops = { 118 .bop_name = "FFS", 119 .bop_write = ffs_bufwrite, 120 .bop_strategy = ffs_geom_strategy, 121 .bop_sync = bufsync, 122 #ifdef NO_FFS_SNAPSHOT 123 .bop_bdflush = bufbdflush, 124 #else 125 .bop_bdflush = ffs_bdflush, 126 #endif 127 }; 128 129 /* 130 * Note that userquota and groupquota options are not currently used 131 * by UFS/FFS code and generally mount(8) does not pass those options 132 * from userland, but they can be passed by loader(8) via 133 * vfs.root.mountfrom.options. 134 */ 135 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 136 "noclusterw", "noexec", "export", "force", "from", "groupquota", 137 "multilabel", "nfsv4acls", "fsckpid", "snapshot", "nosuid", "suiddir", 138 "nosymfollow", "sync", "union", "userquota", NULL }; 139 140 static int 141 ffs_mount(struct mount *mp) 142 { 143 struct vnode *devvp; 144 struct thread *td; 145 struct ufsmount *ump = 0; 146 struct fs *fs; 147 pid_t fsckpid = 0; 148 int error, flags; 149 uint64_t mntorflags; 150 accmode_t accmode; 151 struct nameidata ndp; 152 char *fspec; 153 154 td = curthread; 155 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 156 return (EINVAL); 157 if (uma_inode == NULL) { 158 uma_inode = uma_zcreate("FFS inode", 159 sizeof(struct inode), NULL, NULL, NULL, NULL, 160 UMA_ALIGN_PTR, 0); 161 uma_ufs1 = uma_zcreate("FFS1 dinode", 162 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 163 UMA_ALIGN_PTR, 0); 164 uma_ufs2 = uma_zcreate("FFS2 dinode", 165 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 166 UMA_ALIGN_PTR, 0); 167 } 168 169 vfs_deleteopt(mp->mnt_optnew, "groupquota"); 170 vfs_deleteopt(mp->mnt_optnew, "userquota"); 171 172 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 173 if (error) 174 return (error); 175 176 mntorflags = 0; 177 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 178 mntorflags |= MNT_ACLS; 179 180 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 181 mntorflags |= MNT_SNAPSHOT; 182 /* 183 * Once we have set the MNT_SNAPSHOT flag, do not 184 * persist "snapshot" in the options list. 185 */ 186 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 187 vfs_deleteopt(mp->mnt_opt, "snapshot"); 188 } 189 190 if (vfs_getopt(mp->mnt_optnew, "fsckpid", NULL, NULL) == 0 && 191 vfs_scanopt(mp->mnt_optnew, "fsckpid", "%d", &fsckpid) == 1) { 192 /* 193 * Once we have set the restricted PID, do not 194 * persist "fsckpid" in the options list. 195 */ 196 vfs_deleteopt(mp->mnt_optnew, "fsckpid"); 197 vfs_deleteopt(mp->mnt_opt, "fsckpid"); 198 if (mp->mnt_flag & MNT_UPDATE) { 199 if (VFSTOUFS(mp)->um_fs->fs_ronly == 0 && 200 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 201 vfs_mount_error(mp, 202 "Checker enable: Must be read-only"); 203 return (EINVAL); 204 } 205 } else if (vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 206 vfs_mount_error(mp, 207 "Checker enable: Must be read-only"); 208 return (EINVAL); 209 } 210 /* Set to -1 if we are done */ 211 if (fsckpid == 0) 212 fsckpid = -1; 213 } 214 215 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { 216 if (mntorflags & MNT_ACLS) { 217 vfs_mount_error(mp, 218 "\"acls\" and \"nfsv4acls\" options " 219 "are mutually exclusive"); 220 return (EINVAL); 221 } 222 mntorflags |= MNT_NFS4ACLS; 223 } 224 225 MNT_ILOCK(mp); 226 mp->mnt_flag |= mntorflags; 227 MNT_IUNLOCK(mp); 228 /* 229 * If updating, check whether changing from read-only to 230 * read/write; if there is no device name, that's all we do. 231 */ 232 if (mp->mnt_flag & MNT_UPDATE) { 233 ump = VFSTOUFS(mp); 234 fs = ump->um_fs; 235 devvp = ump->um_devvp; 236 if (fsckpid == -1 && ump->um_fsckpid > 0) { 237 if ((error = ffs_flushfiles(mp, WRITECLOSE, td)) != 0 || 238 (error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) 239 return (error); 240 DROP_GIANT(); 241 g_topology_lock(); 242 /* 243 * Return to normal read-only mode. 244 */ 245 error = g_access(ump->um_cp, 0, -1, 0); 246 g_topology_unlock(); 247 PICKUP_GIANT(); 248 ump->um_fsckpid = 0; 249 } 250 if (fs->fs_ronly == 0 && 251 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 252 /* 253 * Flush any dirty data and suspend filesystem. 254 */ 255 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 256 return (error); 257 for (;;) { 258 vn_finished_write(mp); 259 if ((error = vfs_write_suspend(mp)) != 0) 260 return (error); 261 MNT_ILOCK(mp); 262 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 263 /* 264 * Allow the secondary writes 265 * to proceed. 266 */ 267 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 268 MNTK_SUSPEND2); 269 wakeup(&mp->mnt_flag); 270 MNT_IUNLOCK(mp); 271 /* 272 * Allow the curthread to 273 * ignore the suspension to 274 * synchronize on-disk state. 275 */ 276 td->td_pflags |= TDP_IGNSUSP; 277 break; 278 } 279 MNT_IUNLOCK(mp); 280 vn_start_write(NULL, &mp, V_WAIT); 281 } 282 /* 283 * Check for and optionally get rid of files open 284 * for writing. 285 */ 286 flags = WRITECLOSE; 287 if (mp->mnt_flag & MNT_FORCE) 288 flags |= FORCECLOSE; 289 if (MOUNTEDSOFTDEP(mp)) { 290 error = softdep_flushfiles(mp, flags, td); 291 } else { 292 error = ffs_flushfiles(mp, flags, td); 293 } 294 if (error) { 295 vfs_write_resume(mp); 296 return (error); 297 } 298 if (fs->fs_pendingblocks != 0 || 299 fs->fs_pendinginodes != 0) { 300 printf("WARNING: %s Update error: blocks %jd " 301 "files %d\n", fs->fs_fsmnt, 302 (intmax_t)fs->fs_pendingblocks, 303 fs->fs_pendinginodes); 304 fs->fs_pendingblocks = 0; 305 fs->fs_pendinginodes = 0; 306 } 307 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 308 fs->fs_clean = 1; 309 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 310 fs->fs_ronly = 0; 311 fs->fs_clean = 0; 312 vfs_write_resume(mp); 313 return (error); 314 } 315 if (MOUNTEDSOFTDEP(mp)) 316 softdep_unmount(mp); 317 DROP_GIANT(); 318 g_topology_lock(); 319 /* 320 * Drop our write and exclusive access. 321 */ 322 g_access(ump->um_cp, 0, -1, -1); 323 g_topology_unlock(); 324 PICKUP_GIANT(); 325 fs->fs_ronly = 1; 326 MNT_ILOCK(mp); 327 mp->mnt_flag |= MNT_RDONLY; 328 MNT_IUNLOCK(mp); 329 /* 330 * Allow the writers to note that filesystem 331 * is ro now. 332 */ 333 vfs_write_resume(mp); 334 } 335 if ((mp->mnt_flag & MNT_RELOAD) && 336 (error = ffs_reload(mp, td)) != 0) 337 return (error); 338 if (fs->fs_ronly && 339 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 340 /* 341 * If we are running a checker, do not allow upgrade. 342 */ 343 if (ump->um_fsckpid > 0) { 344 vfs_mount_error(mp, 345 "Active checker, cannot upgrade to write"); 346 return (EINVAL); 347 } 348 /* 349 * If upgrade to read-write by non-root, then verify 350 * that user has necessary permissions on the device. 351 */ 352 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 353 error = VOP_ACCESS(devvp, VREAD | VWRITE, 354 td->td_ucred, td); 355 if (error) 356 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 357 if (error) { 358 VOP_UNLOCK(devvp, 0); 359 return (error); 360 } 361 VOP_UNLOCK(devvp, 0); 362 fs->fs_flags &= ~FS_UNCLEAN; 363 if (fs->fs_clean == 0) { 364 fs->fs_flags |= FS_UNCLEAN; 365 if ((mp->mnt_flag & MNT_FORCE) || 366 ((fs->fs_flags & 367 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 368 (fs->fs_flags & FS_DOSOFTDEP))) { 369 printf("WARNING: %s was not properly " 370 "dismounted\n", fs->fs_fsmnt); 371 } else { 372 vfs_mount_error(mp, 373 "R/W mount of %s denied. %s.%s", 374 fs->fs_fsmnt, 375 "Filesystem is not clean - run fsck", 376 (fs->fs_flags & FS_SUJ) == 0 ? "" : 377 " Forced mount will invalidate" 378 " journal contents"); 379 return (EPERM); 380 } 381 } 382 DROP_GIANT(); 383 g_topology_lock(); 384 /* 385 * Request exclusive write access. 386 */ 387 error = g_access(ump->um_cp, 0, 1, 1); 388 g_topology_unlock(); 389 PICKUP_GIANT(); 390 if (error) 391 return (error); 392 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 393 return (error); 394 fs->fs_ronly = 0; 395 MNT_ILOCK(mp); 396 mp->mnt_flag &= ~MNT_RDONLY; 397 MNT_IUNLOCK(mp); 398 fs->fs_mtime = time_second; 399 /* check to see if we need to start softdep */ 400 if ((fs->fs_flags & FS_DOSOFTDEP) && 401 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 402 vn_finished_write(mp); 403 return (error); 404 } 405 fs->fs_clean = 0; 406 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 407 vn_finished_write(mp); 408 return (error); 409 } 410 if (devvp->v_type == VCHR && devvp->v_rdev != NULL) 411 devvp->v_rdev->si_mountpt = mp; 412 if (fs->fs_snapinum[0] != 0) 413 ffs_snapshot_mount(mp); 414 vn_finished_write(mp); 415 } 416 /* 417 * Soft updates is incompatible with "async", 418 * so if we are doing softupdates stop the user 419 * from setting the async flag in an update. 420 * Softdep_mount() clears it in an initial mount 421 * or ro->rw remount. 422 */ 423 if (MOUNTEDSOFTDEP(mp)) { 424 /* XXX: Reset too late ? */ 425 MNT_ILOCK(mp); 426 mp->mnt_flag &= ~MNT_ASYNC; 427 MNT_IUNLOCK(mp); 428 } 429 /* 430 * Keep MNT_ACLS flag if it is stored in superblock. 431 */ 432 if ((fs->fs_flags & FS_ACLS) != 0) { 433 /* XXX: Set too late ? */ 434 MNT_ILOCK(mp); 435 mp->mnt_flag |= MNT_ACLS; 436 MNT_IUNLOCK(mp); 437 } 438 439 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 440 /* XXX: Set too late ? */ 441 MNT_ILOCK(mp); 442 mp->mnt_flag |= MNT_NFS4ACLS; 443 MNT_IUNLOCK(mp); 444 } 445 /* 446 * If this is a request from fsck to clean up the filesystem, 447 * then allow the specified pid to proceed. 448 */ 449 if (fsckpid > 0) { 450 if (ump->um_fsckpid != 0) { 451 vfs_mount_error(mp, 452 "Active checker already running on %s", 453 fs->fs_fsmnt); 454 return (EINVAL); 455 } 456 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 457 ("soft updates enabled on read-only file system")); 458 DROP_GIANT(); 459 g_topology_lock(); 460 /* 461 * Request write access. 462 */ 463 error = g_access(ump->um_cp, 0, 1, 0); 464 g_topology_unlock(); 465 PICKUP_GIANT(); 466 if (error) { 467 vfs_mount_error(mp, 468 "Checker activation failed on %s", 469 fs->fs_fsmnt); 470 return (error); 471 } 472 ump->um_fsckpid = fsckpid; 473 if (fs->fs_snapinum[0] != 0) 474 ffs_snapshot_mount(mp); 475 fs->fs_mtime = time_second; 476 fs->fs_fmod = 1; 477 fs->fs_clean = 0; 478 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 479 } 480 481 /* 482 * If this is a snapshot request, take the snapshot. 483 */ 484 if (mp->mnt_flag & MNT_SNAPSHOT) 485 return (ffs_snapshot(mp, fspec)); 486 } 487 488 /* 489 * Not an update, or updating the name: look up the name 490 * and verify that it refers to a sensible disk device. 491 */ 492 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 493 if ((error = namei(&ndp)) != 0) 494 return (error); 495 NDFREE(&ndp, NDF_ONLY_PNBUF); 496 devvp = ndp.ni_vp; 497 if (!vn_isdisk(devvp, &error)) { 498 vput(devvp); 499 return (error); 500 } 501 502 /* 503 * If mount by non-root, then verify that user has necessary 504 * permissions on the device. 505 */ 506 accmode = VREAD; 507 if ((mp->mnt_flag & MNT_RDONLY) == 0) 508 accmode |= VWRITE; 509 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 510 if (error) 511 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 512 if (error) { 513 vput(devvp); 514 return (error); 515 } 516 517 if (mp->mnt_flag & MNT_UPDATE) { 518 /* 519 * Update only 520 * 521 * If it's not the same vnode, or at least the same device 522 * then it's not correct. 523 */ 524 525 if (devvp->v_rdev != ump->um_devvp->v_rdev) 526 error = EINVAL; /* needs translation */ 527 vput(devvp); 528 if (error) 529 return (error); 530 } else { 531 /* 532 * New mount 533 * 534 * We need the name for the mount point (also used for 535 * "last mounted on") copied in. If an error occurs, 536 * the mount point is discarded by the upper level code. 537 * Note that vfs_mount() populates f_mntonname for us. 538 */ 539 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 540 vrele(devvp); 541 return (error); 542 } 543 if (fsckpid > 0) { 544 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 545 ("soft updates enabled on read-only file system")); 546 ump = VFSTOUFS(mp); 547 fs = ump->um_fs; 548 DROP_GIANT(); 549 g_topology_lock(); 550 /* 551 * Request write access. 552 */ 553 error = g_access(ump->um_cp, 0, 1, 0); 554 g_topology_unlock(); 555 PICKUP_GIANT(); 556 if (error) { 557 printf("WARNING: %s: Checker activation " 558 "failed\n", fs->fs_fsmnt); 559 } else { 560 ump->um_fsckpid = fsckpid; 561 if (fs->fs_snapinum[0] != 0) 562 ffs_snapshot_mount(mp); 563 fs->fs_mtime = time_second; 564 fs->fs_clean = 0; 565 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 566 } 567 } 568 } 569 vfs_mountedfrom(mp, fspec); 570 return (0); 571 } 572 573 /* 574 * Compatibility with old mount system call. 575 */ 576 577 static int 578 ffs_cmount(struct mntarg *ma, void *data, uint64_t flags) 579 { 580 struct ufs_args args; 581 struct export_args exp; 582 int error; 583 584 if (data == NULL) 585 return (EINVAL); 586 error = copyin(data, &args, sizeof args); 587 if (error) 588 return (error); 589 vfs_oexport_conv(&args.export, &exp); 590 591 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 592 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 593 error = kernel_mount(ma, flags); 594 595 return (error); 596 } 597 598 /* 599 * Reload all incore data for a filesystem (used after running fsck on 600 * the root filesystem and finding things to fix). The filesystem must 601 * be mounted read-only. 602 * 603 * Things to do to update the mount: 604 * 1) invalidate all cached meta-data. 605 * 2) re-read superblock from disk. 606 * 3) re-read summary information from disk. 607 * 4) invalidate all inactive vnodes. 608 * 5) invalidate all cached file data. 609 * 6) re-read inode data for all active vnodes. 610 */ 611 static int 612 ffs_reload(struct mount *mp, struct thread *td) 613 { 614 struct vnode *vp, *mvp, *devvp; 615 struct inode *ip; 616 void *space; 617 struct buf *bp; 618 struct fs *fs, *newfs; 619 struct ufsmount *ump; 620 ufs2_daddr_t sblockloc; 621 int i, blks, size, error; 622 int32_t *lp; 623 624 if ((mp->mnt_flag & MNT_RDONLY) == 0) 625 return (EINVAL); 626 ump = VFSTOUFS(mp); 627 /* 628 * Step 1: invalidate all cached meta-data. 629 */ 630 devvp = VFSTOUFS(mp)->um_devvp; 631 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 632 if (vinvalbuf(devvp, 0, 0, 0) != 0) 633 panic("ffs_reload: dirty1"); 634 VOP_UNLOCK(devvp, 0); 635 636 /* 637 * Step 2: re-read superblock from disk. 638 */ 639 fs = VFSTOUFS(mp)->um_fs; 640 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 641 NOCRED, &bp)) != 0) 642 return (error); 643 newfs = (struct fs *)bp->b_data; 644 if ((newfs->fs_magic != FS_UFS1_MAGIC && 645 newfs->fs_magic != FS_UFS2_MAGIC) || 646 newfs->fs_bsize > MAXBSIZE || 647 newfs->fs_bsize < sizeof(struct fs)) { 648 brelse(bp); 649 return (EIO); /* XXX needs translation */ 650 } 651 /* 652 * Copy pointer fields back into superblock before copying in XXX 653 * new superblock. These should really be in the ufsmount. XXX 654 * Note that important parameters (eg fs_ncg) are unchanged. 655 */ 656 newfs->fs_csp = fs->fs_csp; 657 newfs->fs_maxcluster = fs->fs_maxcluster; 658 newfs->fs_contigdirs = fs->fs_contigdirs; 659 newfs->fs_active = fs->fs_active; 660 /* The file system is still read-only. */ 661 newfs->fs_ronly = 1; 662 sblockloc = fs->fs_sblockloc; 663 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 664 brelse(bp); 665 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 666 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 667 UFS_LOCK(ump); 668 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 669 printf("WARNING: %s: reload pending error: blocks %jd " 670 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 671 fs->fs_pendinginodes); 672 fs->fs_pendingblocks = 0; 673 fs->fs_pendinginodes = 0; 674 } 675 UFS_UNLOCK(ump); 676 677 /* 678 * Step 3: re-read summary information from disk. 679 */ 680 blks = howmany(fs->fs_cssize, fs->fs_fsize); 681 space = fs->fs_csp; 682 for (i = 0; i < blks; i += fs->fs_frag) { 683 size = fs->fs_bsize; 684 if (i + fs->fs_frag > blks) 685 size = (blks - i) * fs->fs_fsize; 686 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 687 NOCRED, &bp); 688 if (error) 689 return (error); 690 bcopy(bp->b_data, space, (u_int)size); 691 space = (char *)space + size; 692 brelse(bp); 693 } 694 /* 695 * We no longer know anything about clusters per cylinder group. 696 */ 697 if (fs->fs_contigsumsize > 0) { 698 lp = fs->fs_maxcluster; 699 for (i = 0; i < fs->fs_ncg; i++) 700 *lp++ = fs->fs_contigsumsize; 701 } 702 703 loop: 704 MNT_ILOCK(mp); 705 MNT_VNODE_FOREACH(vp, mp, mvp) { 706 VI_LOCK(vp); 707 if (vp->v_iflag & VI_DOOMED) { 708 VI_UNLOCK(vp); 709 continue; 710 } 711 MNT_IUNLOCK(mp); 712 /* 713 * Step 4: invalidate all cached file data. 714 */ 715 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 716 MNT_VNODE_FOREACH_ABORT(mp, mvp); 717 goto loop; 718 } 719 if (vinvalbuf(vp, 0, 0, 0)) 720 panic("ffs_reload: dirty2"); 721 /* 722 * Step 5: re-read inode data for all active vnodes. 723 */ 724 ip = VTOI(vp); 725 error = 726 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 727 (int)fs->fs_bsize, NOCRED, &bp); 728 if (error) { 729 VOP_UNLOCK(vp, 0); 730 vrele(vp); 731 MNT_VNODE_FOREACH_ABORT(mp, mvp); 732 return (error); 733 } 734 ffs_load_inode(bp, ip, fs, ip->i_number); 735 ip->i_effnlink = ip->i_nlink; 736 brelse(bp); 737 VOP_UNLOCK(vp, 0); 738 vrele(vp); 739 MNT_ILOCK(mp); 740 } 741 MNT_IUNLOCK(mp); 742 return (0); 743 } 744 745 /* 746 * Possible superblock locations ordered from most to least likely. 747 */ 748 static int sblock_try[] = SBLOCKSEARCH; 749 750 /* 751 * Common code for mount and mountroot 752 */ 753 static int 754 ffs_mountfs(devvp, mp, td) 755 struct vnode *devvp; 756 struct mount *mp; 757 struct thread *td; 758 { 759 struct ufsmount *ump; 760 struct buf *bp; 761 struct fs *fs; 762 struct cdev *dev; 763 void *space; 764 ufs2_daddr_t sblockloc; 765 int error, i, blks, size, ronly; 766 int32_t *lp; 767 struct ucred *cred; 768 struct g_consumer *cp; 769 struct mount *nmp; 770 771 bp = NULL; 772 ump = NULL; 773 cred = td ? td->td_ucred : NOCRED; 774 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 775 776 dev = devvp->v_rdev; 777 dev_ref(dev); 778 DROP_GIANT(); 779 g_topology_lock(); 780 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 781 g_topology_unlock(); 782 PICKUP_GIANT(); 783 VOP_UNLOCK(devvp, 0); 784 if (error) 785 goto out; 786 if (devvp->v_rdev->si_iosize_max != 0) 787 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 788 if (mp->mnt_iosize_max > MAXPHYS) 789 mp->mnt_iosize_max = MAXPHYS; 790 791 devvp->v_bufobj.bo_ops = &ffs_ops; 792 793 fs = NULL; 794 sblockloc = 0; 795 /* 796 * Try reading the superblock in each of its possible locations. 797 */ 798 for (i = 0; sblock_try[i] != -1; i++) { 799 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 800 error = EINVAL; 801 vfs_mount_error(mp, 802 "Invalid sectorsize %d for superblock size %d", 803 cp->provider->sectorsize, SBLOCKSIZE); 804 goto out; 805 } 806 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 807 cred, &bp)) != 0) 808 goto out; 809 fs = (struct fs *)bp->b_data; 810 sblockloc = sblock_try[i]; 811 if ((fs->fs_magic == FS_UFS1_MAGIC || 812 (fs->fs_magic == FS_UFS2_MAGIC && 813 (fs->fs_sblockloc == sblockloc || 814 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 815 fs->fs_bsize <= MAXBSIZE && 816 fs->fs_bsize >= sizeof(struct fs)) 817 break; 818 brelse(bp); 819 bp = NULL; 820 } 821 if (sblock_try[i] == -1) { 822 error = EINVAL; /* XXX needs translation */ 823 goto out; 824 } 825 fs->fs_fmod = 0; 826 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 827 fs->fs_flags &= ~FS_UNCLEAN; 828 if (fs->fs_clean == 0) { 829 fs->fs_flags |= FS_UNCLEAN; 830 if (ronly || (mp->mnt_flag & MNT_FORCE) || 831 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 832 (fs->fs_flags & FS_DOSOFTDEP))) { 833 printf("WARNING: %s was not properly dismounted\n", 834 fs->fs_fsmnt); 835 } else { 836 vfs_mount_error(mp, "R/W mount of %s denied. %s%s", 837 fs->fs_fsmnt, "Filesystem is not clean - run fsck.", 838 (fs->fs_flags & FS_SUJ) == 0 ? "" : 839 " Forced mount will invalidate journal contents"); 840 error = EPERM; 841 goto out; 842 } 843 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 844 (mp->mnt_flag & MNT_FORCE)) { 845 printf("WARNING: %s: lost blocks %jd files %d\n", 846 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 847 fs->fs_pendinginodes); 848 fs->fs_pendingblocks = 0; 849 fs->fs_pendinginodes = 0; 850 } 851 } 852 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 853 printf("WARNING: %s: mount pending error: blocks %jd " 854 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 855 fs->fs_pendinginodes); 856 fs->fs_pendingblocks = 0; 857 fs->fs_pendinginodes = 0; 858 } 859 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 860 #ifdef UFS_GJOURNAL 861 /* 862 * Get journal provider name. 863 */ 864 size = 1024; 865 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 866 if (g_io_getattr("GJOURNAL::provider", cp, &size, 867 mp->mnt_gjprovider) == 0) { 868 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 869 M_UFSMNT, M_WAITOK); 870 MNT_ILOCK(mp); 871 mp->mnt_flag |= MNT_GJOURNAL; 872 MNT_IUNLOCK(mp); 873 } else { 874 printf("WARNING: %s: GJOURNAL flag on fs " 875 "but no gjournal provider below\n", 876 mp->mnt_stat.f_mntonname); 877 free(mp->mnt_gjprovider, M_UFSMNT); 878 mp->mnt_gjprovider = NULL; 879 } 880 #else 881 printf("WARNING: %s: GJOURNAL flag on fs but no " 882 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 883 #endif 884 } else { 885 mp->mnt_gjprovider = NULL; 886 } 887 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 888 ump->um_cp = cp; 889 ump->um_bo = &devvp->v_bufobj; 890 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 891 if (fs->fs_magic == FS_UFS1_MAGIC) { 892 ump->um_fstype = UFS1; 893 ump->um_balloc = ffs_balloc_ufs1; 894 } else { 895 ump->um_fstype = UFS2; 896 ump->um_balloc = ffs_balloc_ufs2; 897 } 898 ump->um_blkatoff = ffs_blkatoff; 899 ump->um_truncate = ffs_truncate; 900 ump->um_update = ffs_update; 901 ump->um_valloc = ffs_valloc; 902 ump->um_vfree = ffs_vfree; 903 ump->um_ifree = ffs_ifree; 904 ump->um_rdonly = ffs_rdonly; 905 ump->um_snapgone = ffs_snapgone; 906 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 907 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 908 if (fs->fs_sbsize < SBLOCKSIZE) 909 bp->b_flags |= B_INVAL | B_NOCACHE; 910 brelse(bp); 911 bp = NULL; 912 fs = ump->um_fs; 913 ffs_oldfscompat_read(fs, ump, sblockloc); 914 fs->fs_ronly = ronly; 915 size = fs->fs_cssize; 916 blks = howmany(size, fs->fs_fsize); 917 if (fs->fs_contigsumsize > 0) 918 size += fs->fs_ncg * sizeof(int32_t); 919 size += fs->fs_ncg * sizeof(u_int8_t); 920 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 921 fs->fs_csp = space; 922 for (i = 0; i < blks; i += fs->fs_frag) { 923 size = fs->fs_bsize; 924 if (i + fs->fs_frag > blks) 925 size = (blks - i) * fs->fs_fsize; 926 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 927 cred, &bp)) != 0) { 928 free(fs->fs_csp, M_UFSMNT); 929 goto out; 930 } 931 bcopy(bp->b_data, space, (u_int)size); 932 space = (char *)space + size; 933 brelse(bp); 934 bp = NULL; 935 } 936 if (fs->fs_contigsumsize > 0) { 937 fs->fs_maxcluster = lp = space; 938 for (i = 0; i < fs->fs_ncg; i++) 939 *lp++ = fs->fs_contigsumsize; 940 space = lp; 941 } 942 size = fs->fs_ncg * sizeof(u_int8_t); 943 fs->fs_contigdirs = (u_int8_t *)space; 944 bzero(fs->fs_contigdirs, size); 945 fs->fs_active = NULL; 946 mp->mnt_data = ump; 947 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 948 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 949 nmp = NULL; 950 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 951 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 952 if (nmp) 953 vfs_rel(nmp); 954 vfs_getnewfsid(mp); 955 } 956 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 957 MNT_ILOCK(mp); 958 mp->mnt_flag |= MNT_LOCAL; 959 MNT_IUNLOCK(mp); 960 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 961 #ifdef MAC 962 MNT_ILOCK(mp); 963 mp->mnt_flag |= MNT_MULTILABEL; 964 MNT_IUNLOCK(mp); 965 #else 966 printf("WARNING: %s: multilabel flag on fs but " 967 "no MAC support\n", mp->mnt_stat.f_mntonname); 968 #endif 969 } 970 if ((fs->fs_flags & FS_ACLS) != 0) { 971 #ifdef UFS_ACL 972 MNT_ILOCK(mp); 973 974 if (mp->mnt_flag & MNT_NFS4ACLS) 975 printf("WARNING: %s: ACLs flag on fs conflicts with " 976 "\"nfsv4acls\" mount option; option ignored\n", 977 mp->mnt_stat.f_mntonname); 978 mp->mnt_flag &= ~MNT_NFS4ACLS; 979 mp->mnt_flag |= MNT_ACLS; 980 981 MNT_IUNLOCK(mp); 982 #else 983 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 984 mp->mnt_stat.f_mntonname); 985 #endif 986 } 987 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 988 #ifdef UFS_ACL 989 MNT_ILOCK(mp); 990 991 if (mp->mnt_flag & MNT_ACLS) 992 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 993 "with \"acls\" mount option; option ignored\n", 994 mp->mnt_stat.f_mntonname); 995 mp->mnt_flag &= ~MNT_ACLS; 996 mp->mnt_flag |= MNT_NFS4ACLS; 997 998 MNT_IUNLOCK(mp); 999 #else 1000 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 1001 "ACLs support\n", mp->mnt_stat.f_mntonname); 1002 #endif 1003 } 1004 if ((fs->fs_flags & FS_TRIM) != 0) { 1005 size = sizeof(int); 1006 if (g_io_getattr("GEOM::candelete", cp, &size, 1007 &ump->um_candelete) == 0) { 1008 if (!ump->um_candelete) 1009 printf("WARNING: %s: TRIM flag on fs but disk " 1010 "does not support TRIM\n", 1011 mp->mnt_stat.f_mntonname); 1012 } else { 1013 printf("WARNING: %s: TRIM flag on fs but disk does " 1014 "not confirm that it supports TRIM\n", 1015 mp->mnt_stat.f_mntonname); 1016 ump->um_candelete = 0; 1017 } 1018 } 1019 1020 ump->um_mountp = mp; 1021 ump->um_dev = dev; 1022 ump->um_devvp = devvp; 1023 ump->um_nindir = fs->fs_nindir; 1024 ump->um_bptrtodb = fs->fs_fsbtodb; 1025 ump->um_seqinc = fs->fs_frag; 1026 for (i = 0; i < MAXQUOTAS; i++) 1027 ump->um_quotas[i] = NULLVP; 1028 #ifdef UFS_EXTATTR 1029 ufs_extattr_uepm_init(&ump->um_extattr); 1030 #endif 1031 /* 1032 * Set FS local "last mounted on" information (NULL pad) 1033 */ 1034 bzero(fs->fs_fsmnt, MAXMNTLEN); 1035 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1036 mp->mnt_stat.f_iosize = fs->fs_bsize; 1037 1038 if (mp->mnt_flag & MNT_ROOTFS) { 1039 /* 1040 * Root mount; update timestamp in mount structure. 1041 * this will be used by the common root mount code 1042 * to update the system clock. 1043 */ 1044 mp->mnt_time = fs->fs_time; 1045 } 1046 1047 if (ronly == 0) { 1048 fs->fs_mtime = time_second; 1049 if ((fs->fs_flags & FS_DOSOFTDEP) && 1050 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1051 free(fs->fs_csp, M_UFSMNT); 1052 ffs_flushfiles(mp, FORCECLOSE, td); 1053 goto out; 1054 } 1055 if (devvp->v_type == VCHR && devvp->v_rdev != NULL) 1056 devvp->v_rdev->si_mountpt = mp; 1057 if (fs->fs_snapinum[0] != 0) 1058 ffs_snapshot_mount(mp); 1059 fs->fs_fmod = 1; 1060 fs->fs_clean = 0; 1061 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1062 } 1063 /* 1064 * Initialize filesystem stat information in mount struct. 1065 */ 1066 MNT_ILOCK(mp); 1067 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 1068 MNTK_EXTENDED_SHARED; 1069 MNT_IUNLOCK(mp); 1070 #ifdef UFS_EXTATTR 1071 #ifdef UFS_EXTATTR_AUTOSTART 1072 /* 1073 * 1074 * Auto-starting does the following: 1075 * - check for /.attribute in the fs, and extattr_start if so 1076 * - for each file in .attribute, enable that file with 1077 * an attribute of the same name. 1078 * Not clear how to report errors -- probably eat them. 1079 * This would all happen while the filesystem was busy/not 1080 * available, so would effectively be "atomic". 1081 */ 1082 (void) ufs_extattr_autostart(mp, td); 1083 #endif /* !UFS_EXTATTR_AUTOSTART */ 1084 #endif /* !UFS_EXTATTR */ 1085 return (0); 1086 out: 1087 if (bp) 1088 brelse(bp); 1089 if (cp != NULL) { 1090 DROP_GIANT(); 1091 g_topology_lock(); 1092 g_vfs_close(cp); 1093 g_topology_unlock(); 1094 PICKUP_GIANT(); 1095 } 1096 if (ump) { 1097 mtx_destroy(UFS_MTX(ump)); 1098 if (mp->mnt_gjprovider != NULL) { 1099 free(mp->mnt_gjprovider, M_UFSMNT); 1100 mp->mnt_gjprovider = NULL; 1101 } 1102 free(ump->um_fs, M_UFSMNT); 1103 free(ump, M_UFSMNT); 1104 mp->mnt_data = NULL; 1105 } 1106 dev_rel(dev); 1107 return (error); 1108 } 1109 1110 #include <sys/sysctl.h> 1111 static int bigcgs = 0; 1112 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1113 1114 /* 1115 * Sanity checks for loading old filesystem superblocks. 1116 * See ffs_oldfscompat_write below for unwound actions. 1117 * 1118 * XXX - Parts get retired eventually. 1119 * Unfortunately new bits get added. 1120 */ 1121 static void 1122 ffs_oldfscompat_read(fs, ump, sblockloc) 1123 struct fs *fs; 1124 struct ufsmount *ump; 1125 ufs2_daddr_t sblockloc; 1126 { 1127 off_t maxfilesize; 1128 1129 /* 1130 * If not yet done, update fs_flags location and value of fs_sblockloc. 1131 */ 1132 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1133 fs->fs_flags = fs->fs_old_flags; 1134 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1135 fs->fs_sblockloc = sblockloc; 1136 } 1137 /* 1138 * If not yet done, update UFS1 superblock with new wider fields. 1139 */ 1140 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1141 fs->fs_maxbsize = fs->fs_bsize; 1142 fs->fs_time = fs->fs_old_time; 1143 fs->fs_size = fs->fs_old_size; 1144 fs->fs_dsize = fs->fs_old_dsize; 1145 fs->fs_csaddr = fs->fs_old_csaddr; 1146 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1147 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1148 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1149 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1150 } 1151 if (fs->fs_magic == FS_UFS1_MAGIC && 1152 fs->fs_old_inodefmt < FS_44INODEFMT) { 1153 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1154 fs->fs_qbmask = ~fs->fs_bmask; 1155 fs->fs_qfmask = ~fs->fs_fmask; 1156 } 1157 if (fs->fs_magic == FS_UFS1_MAGIC) { 1158 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1159 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1160 if (fs->fs_maxfilesize > maxfilesize) 1161 fs->fs_maxfilesize = maxfilesize; 1162 } 1163 /* Compatibility for old filesystems */ 1164 if (fs->fs_avgfilesize <= 0) 1165 fs->fs_avgfilesize = AVFILESIZ; 1166 if (fs->fs_avgfpdir <= 0) 1167 fs->fs_avgfpdir = AFPDIR; 1168 if (bigcgs) { 1169 fs->fs_save_cgsize = fs->fs_cgsize; 1170 fs->fs_cgsize = fs->fs_bsize; 1171 } 1172 } 1173 1174 /* 1175 * Unwinding superblock updates for old filesystems. 1176 * See ffs_oldfscompat_read above for details. 1177 * 1178 * XXX - Parts get retired eventually. 1179 * Unfortunately new bits get added. 1180 */ 1181 void 1182 ffs_oldfscompat_write(fs, ump) 1183 struct fs *fs; 1184 struct ufsmount *ump; 1185 { 1186 1187 /* 1188 * Copy back UFS2 updated fields that UFS1 inspects. 1189 */ 1190 if (fs->fs_magic == FS_UFS1_MAGIC) { 1191 fs->fs_old_time = fs->fs_time; 1192 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1193 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1194 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1195 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1196 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1197 } 1198 if (bigcgs) { 1199 fs->fs_cgsize = fs->fs_save_cgsize; 1200 fs->fs_save_cgsize = 0; 1201 } 1202 } 1203 1204 /* 1205 * unmount system call 1206 */ 1207 static int 1208 ffs_unmount(mp, mntflags) 1209 struct mount *mp; 1210 int mntflags; 1211 { 1212 struct thread *td; 1213 struct ufsmount *ump = VFSTOUFS(mp); 1214 struct fs *fs; 1215 int error, flags, susp; 1216 #ifdef UFS_EXTATTR 1217 int e_restart; 1218 #endif 1219 1220 flags = 0; 1221 td = curthread; 1222 fs = ump->um_fs; 1223 susp = 0; 1224 if (mntflags & MNT_FORCE) { 1225 flags |= FORCECLOSE; 1226 susp = fs->fs_ronly != 0; 1227 } 1228 #ifdef UFS_EXTATTR 1229 if ((error = ufs_extattr_stop(mp, td))) { 1230 if (error != EOPNOTSUPP) 1231 printf("WARNING: unmount %s: ufs_extattr_stop " 1232 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1233 error); 1234 e_restart = 0; 1235 } else { 1236 ufs_extattr_uepm_destroy(&ump->um_extattr); 1237 e_restart = 1; 1238 } 1239 #endif 1240 if (susp) { 1241 /* 1242 * dounmount already called vn_start_write(). 1243 */ 1244 for (;;) { 1245 vn_finished_write(mp); 1246 if ((error = vfs_write_suspend(mp)) != 0) 1247 return (error); 1248 MNT_ILOCK(mp); 1249 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1250 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1251 MNTK_SUSPEND2); 1252 wakeup(&mp->mnt_flag); 1253 MNT_IUNLOCK(mp); 1254 td->td_pflags |= TDP_IGNSUSP; 1255 break; 1256 } 1257 MNT_IUNLOCK(mp); 1258 vn_start_write(NULL, &mp, V_WAIT); 1259 } 1260 } 1261 if (MOUNTEDSOFTDEP(mp)) 1262 error = softdep_flushfiles(mp, flags, td); 1263 else 1264 error = ffs_flushfiles(mp, flags, td); 1265 if (error != 0 && error != ENXIO) 1266 goto fail; 1267 1268 UFS_LOCK(ump); 1269 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1270 printf("WARNING: unmount %s: pending error: blocks %jd " 1271 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1272 fs->fs_pendinginodes); 1273 fs->fs_pendingblocks = 0; 1274 fs->fs_pendinginodes = 0; 1275 } 1276 UFS_UNLOCK(ump); 1277 softdep_unmount(mp); 1278 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1279 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1280 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1281 if (error && error != ENXIO) { 1282 fs->fs_clean = 0; 1283 goto fail; 1284 } 1285 } 1286 if (susp) { 1287 vfs_write_resume(mp); 1288 vn_start_write(NULL, &mp, V_WAIT); 1289 } 1290 DROP_GIANT(); 1291 g_topology_lock(); 1292 if (ump->um_fsckpid > 0) { 1293 /* 1294 * Return to normal read-only mode. 1295 */ 1296 error = g_access(ump->um_cp, 0, -1, 0); 1297 ump->um_fsckpid = 0; 1298 } 1299 g_vfs_close(ump->um_cp); 1300 g_topology_unlock(); 1301 PICKUP_GIANT(); 1302 if (ump->um_devvp->v_type == VCHR && ump->um_devvp->v_rdev != NULL) 1303 ump->um_devvp->v_rdev->si_mountpt = NULL; 1304 vrele(ump->um_devvp); 1305 dev_rel(ump->um_dev); 1306 mtx_destroy(UFS_MTX(ump)); 1307 if (mp->mnt_gjprovider != NULL) { 1308 free(mp->mnt_gjprovider, M_UFSMNT); 1309 mp->mnt_gjprovider = NULL; 1310 } 1311 free(fs->fs_csp, M_UFSMNT); 1312 free(fs, M_UFSMNT); 1313 free(ump, M_UFSMNT); 1314 mp->mnt_data = NULL; 1315 MNT_ILOCK(mp); 1316 mp->mnt_flag &= ~MNT_LOCAL; 1317 MNT_IUNLOCK(mp); 1318 return (error); 1319 1320 fail: 1321 if (susp) { 1322 vfs_write_resume(mp); 1323 vn_start_write(NULL, &mp, V_WAIT); 1324 } 1325 #ifdef UFS_EXTATTR 1326 if (e_restart) { 1327 ufs_extattr_uepm_init(&ump->um_extattr); 1328 #ifdef UFS_EXTATTR_AUTOSTART 1329 (void) ufs_extattr_autostart(mp, td); 1330 #endif 1331 } 1332 #endif 1333 1334 return (error); 1335 } 1336 1337 /* 1338 * Flush out all the files in a filesystem. 1339 */ 1340 int 1341 ffs_flushfiles(mp, flags, td) 1342 struct mount *mp; 1343 int flags; 1344 struct thread *td; 1345 { 1346 struct ufsmount *ump; 1347 int error; 1348 1349 ump = VFSTOUFS(mp); 1350 #ifdef QUOTA 1351 if (mp->mnt_flag & MNT_QUOTA) { 1352 int i; 1353 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1354 if (error) 1355 return (error); 1356 for (i = 0; i < MAXQUOTAS; i++) { 1357 quotaoff(td, mp, i); 1358 } 1359 /* 1360 * Here we fall through to vflush again to ensure 1361 * that we have gotten rid of all the system vnodes. 1362 */ 1363 } 1364 #endif 1365 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1366 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1367 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1368 return (error); 1369 ffs_snapshot_unmount(mp); 1370 flags |= FORCECLOSE; 1371 /* 1372 * Here we fall through to vflush again to ensure 1373 * that we have gotten rid of all the system vnodes. 1374 */ 1375 } 1376 /* 1377 * Flush all the files. 1378 */ 1379 if ((error = vflush(mp, 0, flags, td)) != 0) 1380 return (error); 1381 /* 1382 * Flush filesystem metadata. 1383 */ 1384 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1385 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1386 VOP_UNLOCK(ump->um_devvp, 0); 1387 return (error); 1388 } 1389 1390 /* 1391 * Get filesystem statistics. 1392 */ 1393 static int 1394 ffs_statfs(mp, sbp) 1395 struct mount *mp; 1396 struct statfs *sbp; 1397 { 1398 struct ufsmount *ump; 1399 struct fs *fs; 1400 1401 ump = VFSTOUFS(mp); 1402 fs = ump->um_fs; 1403 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1404 panic("ffs_statfs"); 1405 sbp->f_version = STATFS_VERSION; 1406 sbp->f_bsize = fs->fs_fsize; 1407 sbp->f_iosize = fs->fs_bsize; 1408 sbp->f_blocks = fs->fs_dsize; 1409 UFS_LOCK(ump); 1410 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1411 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1412 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1413 dbtofsb(fs, fs->fs_pendingblocks); 1414 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1415 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1416 UFS_UNLOCK(ump); 1417 sbp->f_namemax = NAME_MAX; 1418 return (0); 1419 } 1420 1421 /* 1422 * For a lazy sync, we only care about access times, quotas and the 1423 * superblock. Other filesystem changes are already converted to 1424 * cylinder group blocks or inode blocks updates and are written to 1425 * disk by syncer. 1426 */ 1427 static int 1428 ffs_sync_lazy(mp) 1429 struct mount *mp; 1430 { 1431 struct vnode *mvp, *vp; 1432 struct inode *ip; 1433 struct thread *td; 1434 int allerror, error; 1435 1436 allerror = 0; 1437 td = curthread; 1438 if ((mp->mnt_flag & MNT_NOATIME) != 0) 1439 goto qupdate; 1440 MNT_ILOCK(mp); 1441 MNT_VNODE_FOREACH(vp, mp, mvp) { 1442 VI_LOCK(vp); 1443 if (vp->v_iflag & VI_DOOMED || vp->v_type == VNON) { 1444 VI_UNLOCK(vp); 1445 continue; 1446 } 1447 ip = VTOI(vp); 1448 1449 /* 1450 * The IN_ACCESS flag is converted to IN_MODIFIED by 1451 * ufs_close() and ufs_getattr() by the calls to 1452 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1453 * Test also all the other timestamp flags too, to pick up 1454 * any other cases that could be missed. 1455 */ 1456 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1457 IN_UPDATE)) == 0) { 1458 VI_UNLOCK(vp); 1459 continue; 1460 } 1461 MNT_IUNLOCK(mp); 1462 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, 1463 td)) != 0) { 1464 MNT_ILOCK(mp); 1465 continue; 1466 } 1467 error = ffs_update(vp, 0); 1468 if (error != 0) 1469 allerror = error; 1470 vput(vp); 1471 MNT_ILOCK(mp); 1472 } 1473 MNT_IUNLOCK(mp); 1474 1475 qupdate: 1476 #ifdef QUOTA 1477 qsync(mp); 1478 #endif 1479 1480 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1481 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1482 allerror = error; 1483 return (allerror); 1484 } 1485 1486 /* 1487 * Go through the disk queues to initiate sandbagged IO; 1488 * go through the inodes to write those that have been modified; 1489 * initiate the writing of the super block if it has been modified. 1490 * 1491 * Note: we are always called with the filesystem marked busy using 1492 * vfs_busy(). 1493 */ 1494 static int 1495 ffs_sync(mp, waitfor) 1496 struct mount *mp; 1497 int waitfor; 1498 { 1499 struct vnode *mvp, *vp, *devvp; 1500 struct thread *td; 1501 struct inode *ip; 1502 struct ufsmount *ump = VFSTOUFS(mp); 1503 struct fs *fs; 1504 int error, count, wait, lockreq, allerror = 0; 1505 int suspend; 1506 int suspended; 1507 int secondary_writes; 1508 int secondary_accwrites; 1509 int softdep_deps; 1510 int softdep_accdeps; 1511 struct bufobj *bo; 1512 1513 wait = 0; 1514 suspend = 0; 1515 suspended = 0; 1516 td = curthread; 1517 fs = ump->um_fs; 1518 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) 1519 panic("%s: ffs_sync: modification on read-only filesystem", 1520 fs->fs_fsmnt); 1521 if (waitfor == MNT_LAZY) 1522 return (ffs_sync_lazy(mp)); 1523 1524 /* 1525 * Write back each (modified) inode. 1526 */ 1527 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1528 if (waitfor == MNT_SUSPEND) { 1529 suspend = 1; 1530 waitfor = MNT_WAIT; 1531 } 1532 if (waitfor == MNT_WAIT) { 1533 wait = 1; 1534 lockreq = LK_EXCLUSIVE; 1535 } 1536 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1537 MNT_ILOCK(mp); 1538 loop: 1539 /* Grab snapshot of secondary write counts */ 1540 secondary_writes = mp->mnt_secondary_writes; 1541 secondary_accwrites = mp->mnt_secondary_accwrites; 1542 1543 /* Grab snapshot of softdep dependency counts */ 1544 MNT_IUNLOCK(mp); 1545 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1546 MNT_ILOCK(mp); 1547 1548 MNT_VNODE_FOREACH(vp, mp, mvp) { 1549 /* 1550 * Depend on the vnode interlock to keep things stable enough 1551 * for a quick test. Since there might be hundreds of 1552 * thousands of vnodes, we cannot afford even a subroutine 1553 * call unless there's a good chance that we have work to do. 1554 */ 1555 VI_LOCK(vp); 1556 if (vp->v_iflag & VI_DOOMED) { 1557 VI_UNLOCK(vp); 1558 continue; 1559 } 1560 ip = VTOI(vp); 1561 if (vp->v_type == VNON || ((ip->i_flag & 1562 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1563 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1564 VI_UNLOCK(vp); 1565 continue; 1566 } 1567 MNT_IUNLOCK(mp); 1568 if ((error = vget(vp, lockreq, td)) != 0) { 1569 MNT_ILOCK(mp); 1570 if (error == ENOENT || error == ENOLCK) { 1571 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1572 goto loop; 1573 } 1574 continue; 1575 } 1576 if ((error = ffs_syncvnode(vp, waitfor, 0)) != 0) 1577 allerror = error; 1578 vput(vp); 1579 MNT_ILOCK(mp); 1580 } 1581 MNT_IUNLOCK(mp); 1582 /* 1583 * Force stale filesystem control information to be flushed. 1584 */ 1585 if (waitfor == MNT_WAIT) { 1586 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1587 allerror = error; 1588 /* Flushed work items may create new vnodes to clean */ 1589 if (allerror == 0 && count) { 1590 MNT_ILOCK(mp); 1591 goto loop; 1592 } 1593 } 1594 #ifdef QUOTA 1595 qsync(mp); 1596 #endif 1597 1598 devvp = ump->um_devvp; 1599 bo = &devvp->v_bufobj; 1600 BO_LOCK(bo); 1601 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1602 BO_UNLOCK(bo); 1603 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1604 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1605 allerror = error; 1606 VOP_UNLOCK(devvp, 0); 1607 if (allerror == 0 && waitfor == MNT_WAIT) { 1608 MNT_ILOCK(mp); 1609 goto loop; 1610 } 1611 } else if (suspend != 0) { 1612 if (softdep_check_suspend(mp, 1613 devvp, 1614 softdep_deps, 1615 softdep_accdeps, 1616 secondary_writes, 1617 secondary_accwrites) != 0) 1618 goto loop; /* More work needed */ 1619 mtx_assert(MNT_MTX(mp), MA_OWNED); 1620 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1621 MNT_IUNLOCK(mp); 1622 suspended = 1; 1623 } else 1624 BO_UNLOCK(bo); 1625 /* 1626 * Write back modified superblock. 1627 */ 1628 if (fs->fs_fmod != 0 && 1629 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1630 allerror = error; 1631 return (allerror); 1632 } 1633 1634 int 1635 ffs_vget(mp, ino, flags, vpp) 1636 struct mount *mp; 1637 ino_t ino; 1638 int flags; 1639 struct vnode **vpp; 1640 { 1641 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1642 } 1643 1644 int 1645 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1646 struct mount *mp; 1647 ino_t ino; 1648 int flags; 1649 struct vnode **vpp; 1650 int ffs_flags; 1651 { 1652 struct fs *fs; 1653 struct inode *ip; 1654 struct ufsmount *ump; 1655 struct buf *bp; 1656 struct vnode *vp; 1657 struct cdev *dev; 1658 int error; 1659 1660 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1661 if (error || *vpp != NULL) 1662 return (error); 1663 1664 /* 1665 * We must promote to an exclusive lock for vnode creation. This 1666 * can happen if lookup is passed LOCKSHARED. 1667 */ 1668 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1669 flags &= ~LK_TYPE_MASK; 1670 flags |= LK_EXCLUSIVE; 1671 } 1672 1673 /* 1674 * We do not lock vnode creation as it is believed to be too 1675 * expensive for such rare case as simultaneous creation of vnode 1676 * for same ino by different processes. We just allow them to race 1677 * and check later to decide who wins. Let the race begin! 1678 */ 1679 1680 ump = VFSTOUFS(mp); 1681 dev = ump->um_dev; 1682 fs = ump->um_fs; 1683 1684 /* 1685 * If this malloc() is performed after the getnewvnode() 1686 * it might block, leaving a vnode with a NULL v_data to be 1687 * found by ffs_sync() if a sync happens to fire right then, 1688 * which will cause a panic because ffs_sync() blindly 1689 * dereferences vp->v_data (as well it should). 1690 */ 1691 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1692 1693 /* Allocate a new vnode/inode. */ 1694 if (fs->fs_magic == FS_UFS1_MAGIC) 1695 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1696 else 1697 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1698 if (error) { 1699 *vpp = NULL; 1700 uma_zfree(uma_inode, ip); 1701 return (error); 1702 } 1703 /* 1704 * FFS supports recursive locking. 1705 */ 1706 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1707 VN_LOCK_AREC(vp); 1708 vp->v_data = ip; 1709 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1710 ip->i_vnode = vp; 1711 ip->i_ump = ump; 1712 ip->i_fs = fs; 1713 ip->i_dev = dev; 1714 ip->i_number = ino; 1715 ip->i_ea_refs = 0; 1716 #ifdef QUOTA 1717 { 1718 int i; 1719 for (i = 0; i < MAXQUOTAS; i++) 1720 ip->i_dquot[i] = NODQUOT; 1721 } 1722 #endif 1723 1724 if (ffs_flags & FFSV_FORCEINSMQ) 1725 vp->v_vflag |= VV_FORCEINSMQ; 1726 error = insmntque(vp, mp); 1727 if (error != 0) { 1728 uma_zfree(uma_inode, ip); 1729 *vpp = NULL; 1730 return (error); 1731 } 1732 vp->v_vflag &= ~VV_FORCEINSMQ; 1733 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1734 if (error || *vpp != NULL) 1735 return (error); 1736 1737 /* Read in the disk contents for the inode, copy into the inode. */ 1738 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1739 (int)fs->fs_bsize, NOCRED, &bp); 1740 if (error) { 1741 /* 1742 * The inode does not contain anything useful, so it would 1743 * be misleading to leave it on its hash chain. With mode 1744 * still zero, it will be unlinked and returned to the free 1745 * list by vput(). 1746 */ 1747 brelse(bp); 1748 vput(vp); 1749 *vpp = NULL; 1750 return (error); 1751 } 1752 if (ip->i_ump->um_fstype == UFS1) 1753 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1754 else 1755 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1756 ffs_load_inode(bp, ip, fs, ino); 1757 if (DOINGSOFTDEP(vp)) 1758 softdep_load_inodeblock(ip); 1759 else 1760 ip->i_effnlink = ip->i_nlink; 1761 bqrelse(bp); 1762 1763 /* 1764 * Initialize the vnode from the inode, check for aliases. 1765 * Note that the underlying vnode may have changed. 1766 */ 1767 if (ip->i_ump->um_fstype == UFS1) 1768 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1769 else 1770 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1771 if (error) { 1772 vput(vp); 1773 *vpp = NULL; 1774 return (error); 1775 } 1776 1777 /* 1778 * Finish inode initialization. 1779 */ 1780 if (vp->v_type != VFIFO) { 1781 /* FFS supports shared locking for all files except fifos. */ 1782 VN_LOCK_ASHARE(vp); 1783 } 1784 1785 /* 1786 * Set up a generation number for this inode if it does not 1787 * already have one. This should only happen on old filesystems. 1788 */ 1789 if (ip->i_gen == 0) { 1790 ip->i_gen = arc4random() / 2 + 1; 1791 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1792 ip->i_flag |= IN_MODIFIED; 1793 DIP_SET(ip, i_gen, ip->i_gen); 1794 } 1795 } 1796 #ifdef MAC 1797 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1798 /* 1799 * If this vnode is already allocated, and we're running 1800 * multi-label, attempt to perform a label association 1801 * from the extended attributes on the inode. 1802 */ 1803 error = mac_vnode_associate_extattr(mp, vp); 1804 if (error) { 1805 /* ufs_inactive will release ip->i_devvp ref. */ 1806 vput(vp); 1807 *vpp = NULL; 1808 return (error); 1809 } 1810 } 1811 #endif 1812 1813 *vpp = vp; 1814 return (0); 1815 } 1816 1817 /* 1818 * File handle to vnode 1819 * 1820 * Have to be really careful about stale file handles: 1821 * - check that the inode number is valid 1822 * - call ffs_vget() to get the locked inode 1823 * - check for an unallocated inode (i_mode == 0) 1824 * - check that the given client host has export rights and return 1825 * those rights via. exflagsp and credanonp 1826 */ 1827 static int 1828 ffs_fhtovp(mp, fhp, flags, vpp) 1829 struct mount *mp; 1830 struct fid *fhp; 1831 int flags; 1832 struct vnode **vpp; 1833 { 1834 struct ufid *ufhp; 1835 struct fs *fs; 1836 1837 ufhp = (struct ufid *)fhp; 1838 fs = VFSTOUFS(mp)->um_fs; 1839 if (ufhp->ufid_ino < ROOTINO || 1840 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1841 return (ESTALE); 1842 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1843 } 1844 1845 /* 1846 * Initialize the filesystem. 1847 */ 1848 static int 1849 ffs_init(vfsp) 1850 struct vfsconf *vfsp; 1851 { 1852 1853 softdep_initialize(); 1854 return (ufs_init(vfsp)); 1855 } 1856 1857 /* 1858 * Undo the work of ffs_init(). 1859 */ 1860 static int 1861 ffs_uninit(vfsp) 1862 struct vfsconf *vfsp; 1863 { 1864 int ret; 1865 1866 ret = ufs_uninit(vfsp); 1867 softdep_uninitialize(); 1868 return (ret); 1869 } 1870 1871 /* 1872 * Write a superblock and associated information back to disk. 1873 */ 1874 int 1875 ffs_sbupdate(ump, waitfor, suspended) 1876 struct ufsmount *ump; 1877 int waitfor; 1878 int suspended; 1879 { 1880 struct fs *fs = ump->um_fs; 1881 struct buf *sbbp; 1882 struct buf *bp; 1883 int blks; 1884 void *space; 1885 int i, size, error, allerror = 0; 1886 1887 if (fs->fs_ronly == 1 && 1888 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1889 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1890 panic("ffs_sbupdate: write read-only filesystem"); 1891 /* 1892 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1893 */ 1894 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1895 (int)fs->fs_sbsize, 0, 0, 0); 1896 /* 1897 * First write back the summary information. 1898 */ 1899 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1900 space = fs->fs_csp; 1901 for (i = 0; i < blks; i += fs->fs_frag) { 1902 size = fs->fs_bsize; 1903 if (i + fs->fs_frag > blks) 1904 size = (blks - i) * fs->fs_fsize; 1905 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1906 size, 0, 0, 0); 1907 bcopy(space, bp->b_data, (u_int)size); 1908 space = (char *)space + size; 1909 if (suspended) 1910 bp->b_flags |= B_VALIDSUSPWRT; 1911 if (waitfor != MNT_WAIT) 1912 bawrite(bp); 1913 else if ((error = bwrite(bp)) != 0) 1914 allerror = error; 1915 } 1916 /* 1917 * Now write back the superblock itself. If any errors occurred 1918 * up to this point, then fail so that the superblock avoids 1919 * being written out as clean. 1920 */ 1921 if (allerror) { 1922 brelse(sbbp); 1923 return (allerror); 1924 } 1925 bp = sbbp; 1926 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1927 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1928 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1929 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1930 fs->fs_sblockloc = SBLOCK_UFS1; 1931 } 1932 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1933 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1934 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1935 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1936 fs->fs_sblockloc = SBLOCK_UFS2; 1937 } 1938 fs->fs_fmod = 0; 1939 fs->fs_time = time_second; 1940 if (fs->fs_flags & FS_DOSOFTDEP) 1941 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1942 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1943 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1944 if (suspended) 1945 bp->b_flags |= B_VALIDSUSPWRT; 1946 if (waitfor != MNT_WAIT) 1947 bawrite(bp); 1948 else if ((error = bwrite(bp)) != 0) 1949 allerror = error; 1950 return (allerror); 1951 } 1952 1953 static int 1954 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1955 int attrnamespace, const char *attrname) 1956 { 1957 1958 #ifdef UFS_EXTATTR 1959 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1960 attrname)); 1961 #else 1962 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1963 attrname)); 1964 #endif 1965 } 1966 1967 static void 1968 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1969 { 1970 1971 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1972 uma_zfree(uma_ufs1, ip->i_din1); 1973 else if (ip->i_din2 != NULL) 1974 uma_zfree(uma_ufs2, ip->i_din2); 1975 uma_zfree(uma_inode, ip); 1976 } 1977 1978 static int dobkgrdwrite = 1; 1979 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1980 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1981 1982 /* 1983 * Complete a background write started from bwrite. 1984 */ 1985 static void 1986 ffs_backgroundwritedone(struct buf *bp) 1987 { 1988 struct bufobj *bufobj; 1989 struct buf *origbp; 1990 1991 /* 1992 * Find the original buffer that we are writing. 1993 */ 1994 bufobj = bp->b_bufobj; 1995 BO_LOCK(bufobj); 1996 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1997 panic("backgroundwritedone: lost buffer"); 1998 /* Grab an extra reference to be dropped by the bufdone() below. */ 1999 bufobj_wrefl(bufobj); 2000 BO_UNLOCK(bufobj); 2001 /* 2002 * Process dependencies then return any unfinished ones. 2003 */ 2004 if (!LIST_EMPTY(&bp->b_dep)) 2005 buf_complete(bp); 2006 #ifdef SOFTUPDATES 2007 if (!LIST_EMPTY(&bp->b_dep)) 2008 softdep_move_dependencies(bp, origbp); 2009 #endif 2010 /* 2011 * This buffer is marked B_NOCACHE so when it is released 2012 * by biodone it will be tossed. 2013 */ 2014 bp->b_flags |= B_NOCACHE; 2015 bp->b_flags &= ~B_CACHE; 2016 bufdone(bp); 2017 BO_LOCK(bufobj); 2018 /* 2019 * Clear the BV_BKGRDINPROG flag in the original buffer 2020 * and awaken it if it is waiting for the write to complete. 2021 * If BV_BKGRDINPROG is not set in the original buffer it must 2022 * have been released and re-instantiated - which is not legal. 2023 */ 2024 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2025 ("backgroundwritedone: lost buffer2")); 2026 origbp->b_vflags &= ~BV_BKGRDINPROG; 2027 if (origbp->b_vflags & BV_BKGRDWAIT) { 2028 origbp->b_vflags &= ~BV_BKGRDWAIT; 2029 wakeup(&origbp->b_xflags); 2030 } 2031 BO_UNLOCK(bufobj); 2032 } 2033 2034 2035 /* 2036 * Write, release buffer on completion. (Done by iodone 2037 * if async). Do not bother writing anything if the buffer 2038 * is invalid. 2039 * 2040 * Note that we set B_CACHE here, indicating that buffer is 2041 * fully valid and thus cacheable. This is true even of NFS 2042 * now so we set it generally. This could be set either here 2043 * or in biodone() since the I/O is synchronous. We put it 2044 * here. 2045 */ 2046 static int 2047 ffs_bufwrite(struct buf *bp) 2048 { 2049 int oldflags, s; 2050 struct buf *newbp; 2051 2052 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2053 if (bp->b_flags & B_INVAL) { 2054 brelse(bp); 2055 return (0); 2056 } 2057 2058 oldflags = bp->b_flags; 2059 2060 if (!BUF_ISLOCKED(bp)) 2061 panic("bufwrite: buffer is not busy???"); 2062 s = splbio(); 2063 /* 2064 * If a background write is already in progress, delay 2065 * writing this block if it is asynchronous. Otherwise 2066 * wait for the background write to complete. 2067 */ 2068 BO_LOCK(bp->b_bufobj); 2069 if (bp->b_vflags & BV_BKGRDINPROG) { 2070 if (bp->b_flags & B_ASYNC) { 2071 BO_UNLOCK(bp->b_bufobj); 2072 splx(s); 2073 bdwrite(bp); 2074 return (0); 2075 } 2076 bp->b_vflags |= BV_BKGRDWAIT; 2077 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 2078 if (bp->b_vflags & BV_BKGRDINPROG) 2079 panic("bufwrite: still writing"); 2080 } 2081 BO_UNLOCK(bp->b_bufobj); 2082 2083 /* 2084 * If this buffer is marked for background writing and we 2085 * do not have to wait for it, make a copy and write the 2086 * copy so as to leave this buffer ready for further use. 2087 * 2088 * This optimization eats a lot of memory. If we have a page 2089 * or buffer shortfall we can't do it. 2090 */ 2091 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2092 (bp->b_flags & B_ASYNC) && 2093 !vm_page_count_severe() && 2094 !buf_dirty_count_severe()) { 2095 KASSERT(bp->b_iodone == NULL, 2096 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2097 2098 /* get a new block */ 2099 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2100 if (newbp == NULL) 2101 goto normal_write; 2102 2103 /* 2104 * set it to be identical to the old block. We have to 2105 * set b_lblkno and BKGRDMARKER before calling bgetvp() 2106 * to avoid confusing the splay tree and gbincore(). 2107 */ 2108 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2109 newbp->b_lblkno = bp->b_lblkno; 2110 newbp->b_xflags |= BX_BKGRDMARKER; 2111 BO_LOCK(bp->b_bufobj); 2112 bp->b_vflags |= BV_BKGRDINPROG; 2113 bgetvp(bp->b_vp, newbp); 2114 BO_UNLOCK(bp->b_bufobj); 2115 newbp->b_bufobj = &bp->b_vp->v_bufobj; 2116 newbp->b_blkno = bp->b_blkno; 2117 newbp->b_offset = bp->b_offset; 2118 newbp->b_iodone = ffs_backgroundwritedone; 2119 newbp->b_flags |= B_ASYNC; 2120 newbp->b_flags &= ~B_INVAL; 2121 2122 #ifdef SOFTUPDATES 2123 /* 2124 * Move over the dependencies. If there are rollbacks, 2125 * leave the parent buffer dirtied as it will need to 2126 * be written again. 2127 */ 2128 if (LIST_EMPTY(&bp->b_dep) || 2129 softdep_move_dependencies(bp, newbp) == 0) 2130 bundirty(bp); 2131 #else 2132 bundirty(bp); 2133 #endif 2134 2135 /* 2136 * Initiate write on the copy, release the original to 2137 * the B_LOCKED queue so that it cannot go away until 2138 * the background write completes. If not locked it could go 2139 * away and then be reconstituted while it was being written. 2140 * If the reconstituted buffer were written, we could end up 2141 * with two background copies being written at the same time. 2142 */ 2143 bqrelse(bp); 2144 bp = newbp; 2145 } else 2146 /* Mark the buffer clean */ 2147 bundirty(bp); 2148 2149 2150 /* Let the normal bufwrite do the rest for us */ 2151 normal_write: 2152 return (bufwrite(bp)); 2153 } 2154 2155 2156 static void 2157 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2158 { 2159 struct vnode *vp; 2160 int error; 2161 struct buf *tbp; 2162 int nocopy; 2163 2164 vp = bo->__bo_vnode; 2165 if (bp->b_iocmd == BIO_WRITE) { 2166 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2167 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2168 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2169 panic("ffs_geom_strategy: bad I/O"); 2170 nocopy = bp->b_flags & B_NOCOPY; 2171 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2172 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2173 vp->v_rdev->si_snapdata != NULL) { 2174 if ((bp->b_flags & B_CLUSTER) != 0) { 2175 runningbufwakeup(bp); 2176 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2177 b_cluster.cluster_entry) { 2178 error = ffs_copyonwrite(vp, tbp); 2179 if (error != 0 && 2180 error != EOPNOTSUPP) { 2181 bp->b_error = error; 2182 bp->b_ioflags |= BIO_ERROR; 2183 bufdone(bp); 2184 return; 2185 } 2186 } 2187 bp->b_runningbufspace = bp->b_bufsize; 2188 atomic_add_long(&runningbufspace, 2189 bp->b_runningbufspace); 2190 } else { 2191 error = ffs_copyonwrite(vp, bp); 2192 if (error != 0 && error != EOPNOTSUPP) { 2193 bp->b_error = error; 2194 bp->b_ioflags |= BIO_ERROR; 2195 bufdone(bp); 2196 return; 2197 } 2198 } 2199 } 2200 #ifdef SOFTUPDATES 2201 if ((bp->b_flags & B_CLUSTER) != 0) { 2202 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2203 b_cluster.cluster_entry) { 2204 if (!LIST_EMPTY(&tbp->b_dep)) 2205 buf_start(tbp); 2206 } 2207 } else { 2208 if (!LIST_EMPTY(&bp->b_dep)) 2209 buf_start(bp); 2210 } 2211 2212 #endif 2213 } 2214 g_vfs_strategy(bo, bp); 2215 } 2216 2217 #ifdef DDB 2218 2219 static void 2220 db_print_ffs(struct ufsmount *ump) 2221 { 2222 db_printf("mp %p %s devvp %p fs %p su_wl %d su_deps %d su_req %d\n", 2223 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 2224 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 2225 ump->softdep_deps, ump->softdep_req); 2226 } 2227 2228 DB_SHOW_COMMAND(ffs, db_show_ffs) 2229 { 2230 struct mount *mp; 2231 struct ufsmount *ump; 2232 2233 if (have_addr) { 2234 ump = VFSTOUFS((struct mount *)addr); 2235 db_print_ffs(ump); 2236 return; 2237 } 2238 2239 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2240 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2241 db_print_ffs(VFSTOUFS(mp)); 2242 } 2243 } 2244 2245 #endif /* DDB */ 2246