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