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 (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). The filesystem must 599 * 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 static int 610 ffs_reload(struct mount *mp, struct thread *td) 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 if ((mp->mnt_flag & MNT_RDONLY) == 0) 623 return (EINVAL); 624 ump = VFSTOUFS(mp); 625 /* 626 * Step 1: invalidate all cached meta-data. 627 */ 628 devvp = VFSTOUFS(mp)->um_devvp; 629 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 630 if (vinvalbuf(devvp, 0, 0, 0) != 0) 631 panic("ffs_reload: dirty1"); 632 VOP_UNLOCK(devvp, 0); 633 634 /* 635 * Step 2: re-read superblock from disk. 636 */ 637 fs = VFSTOUFS(mp)->um_fs; 638 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 639 NOCRED, &bp)) != 0) 640 return (error); 641 newfs = (struct fs *)bp->b_data; 642 if ((newfs->fs_magic != FS_UFS1_MAGIC && 643 newfs->fs_magic != FS_UFS2_MAGIC) || 644 newfs->fs_bsize > MAXBSIZE || 645 newfs->fs_bsize < sizeof(struct fs)) { 646 brelse(bp); 647 return (EIO); /* XXX needs translation */ 648 } 649 /* 650 * Copy pointer fields back into superblock before copying in XXX 651 * new superblock. These should really be in the ufsmount. XXX 652 * Note that important parameters (eg fs_ncg) are unchanged. 653 */ 654 newfs->fs_csp = fs->fs_csp; 655 newfs->fs_maxcluster = fs->fs_maxcluster; 656 newfs->fs_contigdirs = fs->fs_contigdirs; 657 newfs->fs_active = fs->fs_active; 658 /* The file system is still read-only. */ 659 newfs->fs_ronly = 1; 660 sblockloc = fs->fs_sblockloc; 661 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 662 brelse(bp); 663 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 664 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 665 UFS_LOCK(ump); 666 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 667 printf("WARNING: %s: reload pending error: blocks %jd " 668 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 669 fs->fs_pendinginodes); 670 fs->fs_pendingblocks = 0; 671 fs->fs_pendinginodes = 0; 672 } 673 UFS_UNLOCK(ump); 674 675 /* 676 * Step 3: re-read summary information from disk. 677 */ 678 blks = howmany(fs->fs_cssize, fs->fs_fsize); 679 space = fs->fs_csp; 680 for (i = 0; i < blks; i += fs->fs_frag) { 681 size = fs->fs_bsize; 682 if (i + fs->fs_frag > blks) 683 size = (blks - i) * fs->fs_fsize; 684 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 685 NOCRED, &bp); 686 if (error) 687 return (error); 688 bcopy(bp->b_data, space, (u_int)size); 689 space = (char *)space + size; 690 brelse(bp); 691 } 692 /* 693 * We no longer know anything about clusters per cylinder group. 694 */ 695 if (fs->fs_contigsumsize > 0) { 696 lp = fs->fs_maxcluster; 697 for (i = 0; i < fs->fs_ncg; i++) 698 *lp++ = fs->fs_contigsumsize; 699 } 700 701 loop: 702 MNT_ILOCK(mp); 703 MNT_VNODE_FOREACH(vp, mp, mvp) { 704 VI_LOCK(vp); 705 if (vp->v_iflag & VI_DOOMED) { 706 VI_UNLOCK(vp); 707 continue; 708 } 709 MNT_IUNLOCK(mp); 710 /* 711 * Step 4: invalidate all cached file data. 712 */ 713 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 714 MNT_VNODE_FOREACH_ABORT(mp, mvp); 715 goto loop; 716 } 717 if (vinvalbuf(vp, 0, 0, 0)) 718 panic("ffs_reload: dirty2"); 719 /* 720 * Step 5: re-read inode data for all active vnodes. 721 */ 722 ip = VTOI(vp); 723 error = 724 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 725 (int)fs->fs_bsize, NOCRED, &bp); 726 if (error) { 727 VOP_UNLOCK(vp, 0); 728 vrele(vp); 729 MNT_VNODE_FOREACH_ABORT(mp, mvp); 730 return (error); 731 } 732 ffs_load_inode(bp, ip, fs, ip->i_number); 733 ip->i_effnlink = ip->i_nlink; 734 brelse(bp); 735 VOP_UNLOCK(vp, 0); 736 vrele(vp); 737 MNT_ILOCK(mp); 738 } 739 MNT_IUNLOCK(mp); 740 return (0); 741 } 742 743 /* 744 * Possible superblock locations ordered from most to least likely. 745 */ 746 static int sblock_try[] = SBLOCKSEARCH; 747 748 /* 749 * Common code for mount and mountroot 750 */ 751 static int 752 ffs_mountfs(devvp, mp, td) 753 struct vnode *devvp; 754 struct mount *mp; 755 struct thread *td; 756 { 757 struct ufsmount *ump; 758 struct buf *bp; 759 struct fs *fs; 760 struct cdev *dev; 761 void *space; 762 ufs2_daddr_t sblockloc; 763 int error, i, blks, size, ronly; 764 int32_t *lp; 765 struct ucred *cred; 766 struct g_consumer *cp; 767 struct mount *nmp; 768 769 bp = NULL; 770 ump = NULL; 771 cred = td ? td->td_ucred : NOCRED; 772 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 773 774 dev = devvp->v_rdev; 775 dev_ref(dev); 776 DROP_GIANT(); 777 g_topology_lock(); 778 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 779 g_topology_unlock(); 780 PICKUP_GIANT(); 781 VOP_UNLOCK(devvp, 0); 782 if (error) 783 goto out; 784 if (devvp->v_rdev->si_iosize_max != 0) 785 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 786 if (mp->mnt_iosize_max > MAXPHYS) 787 mp->mnt_iosize_max = MAXPHYS; 788 789 devvp->v_bufobj.bo_ops = &ffs_ops; 790 791 fs = NULL; 792 sblockloc = 0; 793 /* 794 * Try reading the superblock in each of its possible locations. 795 */ 796 for (i = 0; sblock_try[i] != -1; i++) { 797 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 798 error = EINVAL; 799 vfs_mount_error(mp, 800 "Invalid sectorsize %d for superblock size %d", 801 cp->provider->sectorsize, SBLOCKSIZE); 802 goto out; 803 } 804 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 805 cred, &bp)) != 0) 806 goto out; 807 fs = (struct fs *)bp->b_data; 808 sblockloc = sblock_try[i]; 809 if ((fs->fs_magic == FS_UFS1_MAGIC || 810 (fs->fs_magic == FS_UFS2_MAGIC && 811 (fs->fs_sblockloc == sblockloc || 812 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 813 fs->fs_bsize <= MAXBSIZE && 814 fs->fs_bsize >= sizeof(struct fs)) 815 break; 816 brelse(bp); 817 bp = NULL; 818 } 819 if (sblock_try[i] == -1) { 820 error = EINVAL; /* XXX needs translation */ 821 goto out; 822 } 823 fs->fs_fmod = 0; 824 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 825 fs->fs_flags &= ~FS_UNCLEAN; 826 if (fs->fs_clean == 0) { 827 fs->fs_flags |= FS_UNCLEAN; 828 if (ronly || (mp->mnt_flag & MNT_FORCE) || 829 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 830 (fs->fs_flags & FS_DOSOFTDEP))) { 831 printf("WARNING: %s was not properly dismounted\n", 832 fs->fs_fsmnt); 833 } else { 834 vfs_mount_error(mp, "R/W mount of %s denied. %s%s", 835 fs->fs_fsmnt, "Filesystem is not clean - run fsck.", 836 (fs->fs_flags & FS_SUJ) == 0 ? "" : 837 " Forced mount will invalidate journal contents"); 838 error = EPERM; 839 goto out; 840 } 841 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 842 (mp->mnt_flag & MNT_FORCE)) { 843 printf("WARNING: %s: lost blocks %jd files %d\n", 844 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 845 fs->fs_pendinginodes); 846 fs->fs_pendingblocks = 0; 847 fs->fs_pendinginodes = 0; 848 } 849 } 850 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 851 printf("WARNING: %s: mount pending error: blocks %jd " 852 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 853 fs->fs_pendinginodes); 854 fs->fs_pendingblocks = 0; 855 fs->fs_pendinginodes = 0; 856 } 857 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 858 #ifdef UFS_GJOURNAL 859 /* 860 * Get journal provider name. 861 */ 862 size = 1024; 863 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 864 if (g_io_getattr("GJOURNAL::provider", cp, &size, 865 mp->mnt_gjprovider) == 0) { 866 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 867 M_UFSMNT, M_WAITOK); 868 MNT_ILOCK(mp); 869 mp->mnt_flag |= MNT_GJOURNAL; 870 MNT_IUNLOCK(mp); 871 } else { 872 printf("WARNING: %s: GJOURNAL flag on fs " 873 "but no gjournal provider below\n", 874 mp->mnt_stat.f_mntonname); 875 free(mp->mnt_gjprovider, M_UFSMNT); 876 mp->mnt_gjprovider = NULL; 877 } 878 #else 879 printf("WARNING: %s: GJOURNAL flag on fs but no " 880 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 881 #endif 882 } else { 883 mp->mnt_gjprovider = NULL; 884 } 885 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 886 ump->um_cp = cp; 887 ump->um_bo = &devvp->v_bufobj; 888 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 889 if (fs->fs_magic == FS_UFS1_MAGIC) { 890 ump->um_fstype = UFS1; 891 ump->um_balloc = ffs_balloc_ufs1; 892 } else { 893 ump->um_fstype = UFS2; 894 ump->um_balloc = ffs_balloc_ufs2; 895 } 896 ump->um_blkatoff = ffs_blkatoff; 897 ump->um_truncate = ffs_truncate; 898 ump->um_update = ffs_update; 899 ump->um_valloc = ffs_valloc; 900 ump->um_vfree = ffs_vfree; 901 ump->um_ifree = ffs_ifree; 902 ump->um_rdonly = ffs_rdonly; 903 ump->um_snapgone = ffs_snapgone; 904 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 905 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 906 if (fs->fs_sbsize < SBLOCKSIZE) 907 bp->b_flags |= B_INVAL | B_NOCACHE; 908 brelse(bp); 909 bp = NULL; 910 fs = ump->um_fs; 911 ffs_oldfscompat_read(fs, ump, sblockloc); 912 fs->fs_ronly = ronly; 913 size = fs->fs_cssize; 914 blks = howmany(size, fs->fs_fsize); 915 if (fs->fs_contigsumsize > 0) 916 size += fs->fs_ncg * sizeof(int32_t); 917 size += fs->fs_ncg * sizeof(u_int8_t); 918 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 919 fs->fs_csp = space; 920 for (i = 0; i < blks; i += fs->fs_frag) { 921 size = fs->fs_bsize; 922 if (i + fs->fs_frag > blks) 923 size = (blks - i) * fs->fs_fsize; 924 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 925 cred, &bp)) != 0) { 926 free(fs->fs_csp, M_UFSMNT); 927 goto out; 928 } 929 bcopy(bp->b_data, space, (u_int)size); 930 space = (char *)space + size; 931 brelse(bp); 932 bp = NULL; 933 } 934 if (fs->fs_contigsumsize > 0) { 935 fs->fs_maxcluster = lp = space; 936 for (i = 0; i < fs->fs_ncg; i++) 937 *lp++ = fs->fs_contigsumsize; 938 space = lp; 939 } 940 size = fs->fs_ncg * sizeof(u_int8_t); 941 fs->fs_contigdirs = (u_int8_t *)space; 942 bzero(fs->fs_contigdirs, size); 943 fs->fs_active = NULL; 944 mp->mnt_data = ump; 945 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 946 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 947 nmp = NULL; 948 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 949 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 950 if (nmp) 951 vfs_rel(nmp); 952 vfs_getnewfsid(mp); 953 } 954 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 955 MNT_ILOCK(mp); 956 mp->mnt_flag |= MNT_LOCAL; 957 MNT_IUNLOCK(mp); 958 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 959 #ifdef MAC 960 MNT_ILOCK(mp); 961 mp->mnt_flag |= MNT_MULTILABEL; 962 MNT_IUNLOCK(mp); 963 #else 964 printf("WARNING: %s: multilabel flag on fs but " 965 "no MAC support\n", mp->mnt_stat.f_mntonname); 966 #endif 967 } 968 if ((fs->fs_flags & FS_ACLS) != 0) { 969 #ifdef UFS_ACL 970 MNT_ILOCK(mp); 971 972 if (mp->mnt_flag & MNT_NFS4ACLS) 973 printf("WARNING: %s: ACLs flag on fs conflicts with " 974 "\"nfsv4acls\" mount option; option ignored\n", 975 mp->mnt_stat.f_mntonname); 976 mp->mnt_flag &= ~MNT_NFS4ACLS; 977 mp->mnt_flag |= MNT_ACLS; 978 979 MNT_IUNLOCK(mp); 980 #else 981 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 982 mp->mnt_stat.f_mntonname); 983 #endif 984 } 985 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 986 #ifdef UFS_ACL 987 MNT_ILOCK(mp); 988 989 if (mp->mnt_flag & MNT_ACLS) 990 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 991 "with \"acls\" mount option; option ignored\n", 992 mp->mnt_stat.f_mntonname); 993 mp->mnt_flag &= ~MNT_ACLS; 994 mp->mnt_flag |= MNT_NFS4ACLS; 995 996 MNT_IUNLOCK(mp); 997 #else 998 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 999 "ACLs support\n", mp->mnt_stat.f_mntonname); 1000 #endif 1001 } 1002 if ((fs->fs_flags & FS_TRIM) != 0) { 1003 size = sizeof(int); 1004 if (g_io_getattr("GEOM::candelete", cp, &size, 1005 &ump->um_candelete) == 0) { 1006 if (!ump->um_candelete) 1007 printf("WARNING: %s: TRIM flag on fs but disk " 1008 "does not support TRIM\n", 1009 mp->mnt_stat.f_mntonname); 1010 } else { 1011 printf("WARNING: %s: TRIM flag on fs but disk does " 1012 "not confirm that it supports TRIM\n", 1013 mp->mnt_stat.f_mntonname); 1014 ump->um_candelete = 0; 1015 } 1016 } 1017 1018 ump->um_mountp = mp; 1019 ump->um_dev = dev; 1020 ump->um_devvp = devvp; 1021 ump->um_nindir = fs->fs_nindir; 1022 ump->um_bptrtodb = fs->fs_fsbtodb; 1023 ump->um_seqinc = fs->fs_frag; 1024 for (i = 0; i < MAXQUOTAS; i++) 1025 ump->um_quotas[i] = NULLVP; 1026 #ifdef UFS_EXTATTR 1027 ufs_extattr_uepm_init(&ump->um_extattr); 1028 #endif 1029 /* 1030 * Set FS local "last mounted on" information (NULL pad) 1031 */ 1032 bzero(fs->fs_fsmnt, MAXMNTLEN); 1033 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1034 mp->mnt_stat.f_iosize = fs->fs_bsize; 1035 1036 if (mp->mnt_flag & MNT_ROOTFS) { 1037 /* 1038 * Root mount; update timestamp in mount structure. 1039 * this will be used by the common root mount code 1040 * to update the system clock. 1041 */ 1042 mp->mnt_time = fs->fs_time; 1043 } 1044 1045 if (ronly == 0) { 1046 fs->fs_mtime = time_second; 1047 if ((fs->fs_flags & FS_DOSOFTDEP) && 1048 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1049 free(fs->fs_csp, M_UFSMNT); 1050 ffs_flushfiles(mp, FORCECLOSE, td); 1051 goto out; 1052 } 1053 if (devvp->v_type == VCHR && devvp->v_rdev != NULL) 1054 devvp->v_rdev->si_mountpt = mp; 1055 if (fs->fs_snapinum[0] != 0) 1056 ffs_snapshot_mount(mp); 1057 fs->fs_fmod = 1; 1058 fs->fs_clean = 0; 1059 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1060 } 1061 /* 1062 * Initialize filesystem stat information in mount struct. 1063 */ 1064 MNT_ILOCK(mp); 1065 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 1066 MNTK_EXTENDED_SHARED; 1067 MNT_IUNLOCK(mp); 1068 #ifdef UFS_EXTATTR 1069 #ifdef UFS_EXTATTR_AUTOSTART 1070 /* 1071 * 1072 * Auto-starting does the following: 1073 * - check for /.attribute in the fs, and extattr_start if so 1074 * - for each file in .attribute, enable that file with 1075 * an attribute of the same name. 1076 * Not clear how to report errors -- probably eat them. 1077 * This would all happen while the filesystem was busy/not 1078 * available, so would effectively be "atomic". 1079 */ 1080 (void) ufs_extattr_autostart(mp, td); 1081 #endif /* !UFS_EXTATTR_AUTOSTART */ 1082 #endif /* !UFS_EXTATTR */ 1083 return (0); 1084 out: 1085 if (bp) 1086 brelse(bp); 1087 if (cp != NULL) { 1088 DROP_GIANT(); 1089 g_topology_lock(); 1090 g_vfs_close(cp); 1091 g_topology_unlock(); 1092 PICKUP_GIANT(); 1093 } 1094 if (ump) { 1095 mtx_destroy(UFS_MTX(ump)); 1096 if (mp->mnt_gjprovider != NULL) { 1097 free(mp->mnt_gjprovider, M_UFSMNT); 1098 mp->mnt_gjprovider = NULL; 1099 } 1100 free(ump->um_fs, M_UFSMNT); 1101 free(ump, M_UFSMNT); 1102 mp->mnt_data = NULL; 1103 } 1104 dev_rel(dev); 1105 return (error); 1106 } 1107 1108 #include <sys/sysctl.h> 1109 static int bigcgs = 0; 1110 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1111 1112 /* 1113 * Sanity checks for loading old filesystem superblocks. 1114 * See ffs_oldfscompat_write below for unwound actions. 1115 * 1116 * XXX - Parts get retired eventually. 1117 * Unfortunately new bits get added. 1118 */ 1119 static void 1120 ffs_oldfscompat_read(fs, ump, sblockloc) 1121 struct fs *fs; 1122 struct ufsmount *ump; 1123 ufs2_daddr_t sblockloc; 1124 { 1125 off_t maxfilesize; 1126 1127 /* 1128 * If not yet done, update fs_flags location and value of fs_sblockloc. 1129 */ 1130 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1131 fs->fs_flags = fs->fs_old_flags; 1132 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1133 fs->fs_sblockloc = sblockloc; 1134 } 1135 /* 1136 * If not yet done, update UFS1 superblock with new wider fields. 1137 */ 1138 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1139 fs->fs_maxbsize = fs->fs_bsize; 1140 fs->fs_time = fs->fs_old_time; 1141 fs->fs_size = fs->fs_old_size; 1142 fs->fs_dsize = fs->fs_old_dsize; 1143 fs->fs_csaddr = fs->fs_old_csaddr; 1144 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1145 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1146 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1147 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1148 } 1149 if (fs->fs_magic == FS_UFS1_MAGIC && 1150 fs->fs_old_inodefmt < FS_44INODEFMT) { 1151 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1152 fs->fs_qbmask = ~fs->fs_bmask; 1153 fs->fs_qfmask = ~fs->fs_fmask; 1154 } 1155 if (fs->fs_magic == FS_UFS1_MAGIC) { 1156 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1157 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1158 if (fs->fs_maxfilesize > maxfilesize) 1159 fs->fs_maxfilesize = maxfilesize; 1160 } 1161 /* Compatibility for old filesystems */ 1162 if (fs->fs_avgfilesize <= 0) 1163 fs->fs_avgfilesize = AVFILESIZ; 1164 if (fs->fs_avgfpdir <= 0) 1165 fs->fs_avgfpdir = AFPDIR; 1166 if (bigcgs) { 1167 fs->fs_save_cgsize = fs->fs_cgsize; 1168 fs->fs_cgsize = fs->fs_bsize; 1169 } 1170 } 1171 1172 /* 1173 * Unwinding superblock updates for old filesystems. 1174 * See ffs_oldfscompat_read above for details. 1175 * 1176 * XXX - Parts get retired eventually. 1177 * Unfortunately new bits get added. 1178 */ 1179 void 1180 ffs_oldfscompat_write(fs, ump) 1181 struct fs *fs; 1182 struct ufsmount *ump; 1183 { 1184 1185 /* 1186 * Copy back UFS2 updated fields that UFS1 inspects. 1187 */ 1188 if (fs->fs_magic == FS_UFS1_MAGIC) { 1189 fs->fs_old_time = fs->fs_time; 1190 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1191 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1192 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1193 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1194 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1195 } 1196 if (bigcgs) { 1197 fs->fs_cgsize = fs->fs_save_cgsize; 1198 fs->fs_save_cgsize = 0; 1199 } 1200 } 1201 1202 /* 1203 * unmount system call 1204 */ 1205 static int 1206 ffs_unmount(mp, mntflags) 1207 struct mount *mp; 1208 int mntflags; 1209 { 1210 struct thread *td; 1211 struct ufsmount *ump = VFSTOUFS(mp); 1212 struct fs *fs; 1213 int error, flags, susp; 1214 #ifdef UFS_EXTATTR 1215 int e_restart; 1216 #endif 1217 1218 flags = 0; 1219 td = curthread; 1220 fs = ump->um_fs; 1221 susp = 0; 1222 if (mntflags & MNT_FORCE) { 1223 flags |= FORCECLOSE; 1224 susp = fs->fs_ronly != 0; 1225 } 1226 #ifdef UFS_EXTATTR 1227 if ((error = ufs_extattr_stop(mp, td))) { 1228 if (error != EOPNOTSUPP) 1229 printf("WARNING: unmount %s: ufs_extattr_stop " 1230 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1231 error); 1232 e_restart = 0; 1233 } else { 1234 ufs_extattr_uepm_destroy(&ump->um_extattr); 1235 e_restart = 1; 1236 } 1237 #endif 1238 if (susp) { 1239 /* 1240 * dounmount already called vn_start_write(). 1241 */ 1242 for (;;) { 1243 vn_finished_write(mp); 1244 if ((error = vfs_write_suspend(mp)) != 0) 1245 return (error); 1246 MNT_ILOCK(mp); 1247 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1248 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1249 MNTK_SUSPEND2); 1250 wakeup(&mp->mnt_flag); 1251 MNT_IUNLOCK(mp); 1252 td->td_pflags |= TDP_IGNSUSP; 1253 break; 1254 } 1255 MNT_IUNLOCK(mp); 1256 vn_start_write(NULL, &mp, V_WAIT); 1257 } 1258 } 1259 if (MOUNTEDSOFTDEP(mp)) 1260 error = softdep_flushfiles(mp, flags, td); 1261 else 1262 error = ffs_flushfiles(mp, flags, td); 1263 if (error != 0 && error != ENXIO) 1264 goto fail; 1265 1266 UFS_LOCK(ump); 1267 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1268 printf("WARNING: unmount %s: pending error: blocks %jd " 1269 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1270 fs->fs_pendinginodes); 1271 fs->fs_pendingblocks = 0; 1272 fs->fs_pendinginodes = 0; 1273 } 1274 UFS_UNLOCK(ump); 1275 softdep_unmount(mp); 1276 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1277 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1278 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1279 if (error && error != ENXIO) { 1280 fs->fs_clean = 0; 1281 goto fail; 1282 } 1283 } 1284 if (susp) { 1285 vfs_write_resume(mp); 1286 vn_start_write(NULL, &mp, V_WAIT); 1287 } 1288 DROP_GIANT(); 1289 g_topology_lock(); 1290 if (ump->um_fsckpid > 0) { 1291 /* 1292 * Return to normal read-only mode. 1293 */ 1294 error = g_access(ump->um_cp, 0, -1, 0); 1295 ump->um_fsckpid = 0; 1296 } 1297 g_vfs_close(ump->um_cp); 1298 g_topology_unlock(); 1299 PICKUP_GIANT(); 1300 if (ump->um_devvp->v_type == VCHR && ump->um_devvp->v_rdev != NULL) 1301 ump->um_devvp->v_rdev->si_mountpt = NULL; 1302 vrele(ump->um_devvp); 1303 dev_rel(ump->um_dev); 1304 mtx_destroy(UFS_MTX(ump)); 1305 if (mp->mnt_gjprovider != NULL) { 1306 free(mp->mnt_gjprovider, M_UFSMNT); 1307 mp->mnt_gjprovider = NULL; 1308 } 1309 free(fs->fs_csp, M_UFSMNT); 1310 free(fs, M_UFSMNT); 1311 free(ump, M_UFSMNT); 1312 mp->mnt_data = NULL; 1313 MNT_ILOCK(mp); 1314 mp->mnt_flag &= ~MNT_LOCAL; 1315 MNT_IUNLOCK(mp); 1316 return (error); 1317 1318 fail: 1319 if (susp) { 1320 vfs_write_resume(mp); 1321 vn_start_write(NULL, &mp, V_WAIT); 1322 } 1323 #ifdef UFS_EXTATTR 1324 if (e_restart) { 1325 ufs_extattr_uepm_init(&ump->um_extattr); 1326 #ifdef UFS_EXTATTR_AUTOSTART 1327 (void) ufs_extattr_autostart(mp, td); 1328 #endif 1329 } 1330 #endif 1331 1332 return (error); 1333 } 1334 1335 /* 1336 * Flush out all the files in a filesystem. 1337 */ 1338 int 1339 ffs_flushfiles(mp, flags, td) 1340 struct mount *mp; 1341 int flags; 1342 struct thread *td; 1343 { 1344 struct ufsmount *ump; 1345 int error; 1346 1347 ump = VFSTOUFS(mp); 1348 #ifdef QUOTA 1349 if (mp->mnt_flag & MNT_QUOTA) { 1350 int i; 1351 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1352 if (error) 1353 return (error); 1354 for (i = 0; i < MAXQUOTAS; i++) { 1355 quotaoff(td, mp, i); 1356 } 1357 /* 1358 * Here we fall through to vflush again to ensure 1359 * that we have gotten rid of all the system vnodes. 1360 */ 1361 } 1362 #endif 1363 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1364 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1365 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1366 return (error); 1367 ffs_snapshot_unmount(mp); 1368 flags |= FORCECLOSE; 1369 /* 1370 * Here we fall through to vflush again to ensure 1371 * that we have gotten rid of all the system vnodes. 1372 */ 1373 } 1374 /* 1375 * Flush all the files. 1376 */ 1377 if ((error = vflush(mp, 0, flags, td)) != 0) 1378 return (error); 1379 /* 1380 * Flush filesystem metadata. 1381 */ 1382 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1383 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1384 VOP_UNLOCK(ump->um_devvp, 0); 1385 return (error); 1386 } 1387 1388 /* 1389 * Get filesystem statistics. 1390 */ 1391 static int 1392 ffs_statfs(mp, sbp) 1393 struct mount *mp; 1394 struct statfs *sbp; 1395 { 1396 struct ufsmount *ump; 1397 struct fs *fs; 1398 1399 ump = VFSTOUFS(mp); 1400 fs = ump->um_fs; 1401 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1402 panic("ffs_statfs"); 1403 sbp->f_version = STATFS_VERSION; 1404 sbp->f_bsize = fs->fs_fsize; 1405 sbp->f_iosize = fs->fs_bsize; 1406 sbp->f_blocks = fs->fs_dsize; 1407 UFS_LOCK(ump); 1408 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1409 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1410 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1411 dbtofsb(fs, fs->fs_pendingblocks); 1412 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1413 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1414 UFS_UNLOCK(ump); 1415 sbp->f_namemax = NAME_MAX; 1416 return (0); 1417 } 1418 1419 /* 1420 * For a lazy sync, we only care about access times, quotas and the 1421 * superblock. Other filesystem changes are already converted to 1422 * cylinder group blocks or inode blocks updates and are written to 1423 * disk by syncer. 1424 */ 1425 static int 1426 ffs_sync_lazy(mp) 1427 struct mount *mp; 1428 { 1429 struct vnode *mvp, *vp; 1430 struct inode *ip; 1431 struct thread *td; 1432 int allerror, error; 1433 1434 allerror = 0; 1435 td = curthread; 1436 if ((mp->mnt_flag & MNT_NOATIME) != 0) 1437 goto qupdate; 1438 MNT_ILOCK(mp); 1439 MNT_VNODE_FOREACH(vp, mp, mvp) { 1440 VI_LOCK(vp); 1441 if (vp->v_iflag & VI_DOOMED || vp->v_type == VNON) { 1442 VI_UNLOCK(vp); 1443 continue; 1444 } 1445 ip = VTOI(vp); 1446 1447 /* 1448 * The IN_ACCESS flag is converted to IN_MODIFIED by 1449 * ufs_close() and ufs_getattr() by the calls to 1450 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1451 * Test also all the other timestamp flags too, to pick up 1452 * any other cases that could be missed. 1453 */ 1454 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1455 IN_UPDATE)) == 0) { 1456 VI_UNLOCK(vp); 1457 continue; 1458 } 1459 MNT_IUNLOCK(mp); 1460 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, 1461 td)) != 0) { 1462 MNT_ILOCK(mp); 1463 continue; 1464 } 1465 error = ffs_update(vp, 0); 1466 if (error != 0) 1467 allerror = error; 1468 vput(vp); 1469 MNT_ILOCK(mp); 1470 } 1471 MNT_IUNLOCK(mp); 1472 1473 qupdate: 1474 #ifdef QUOTA 1475 qsync(mp); 1476 #endif 1477 1478 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1479 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1480 allerror = error; 1481 return (allerror); 1482 } 1483 1484 /* 1485 * Go through the disk queues to initiate sandbagged IO; 1486 * go through the inodes to write those that have been modified; 1487 * initiate the writing of the super block if it has been modified. 1488 * 1489 * Note: we are always called with the filesystem marked busy using 1490 * vfs_busy(). 1491 */ 1492 static int 1493 ffs_sync(mp, waitfor) 1494 struct mount *mp; 1495 int waitfor; 1496 { 1497 struct vnode *mvp, *vp, *devvp; 1498 struct thread *td; 1499 struct inode *ip; 1500 struct ufsmount *ump = VFSTOUFS(mp); 1501 struct fs *fs; 1502 int error, count, wait, lockreq, allerror = 0; 1503 int suspend; 1504 int suspended; 1505 int secondary_writes; 1506 int secondary_accwrites; 1507 int softdep_deps; 1508 int softdep_accdeps; 1509 struct bufobj *bo; 1510 1511 wait = 0; 1512 suspend = 0; 1513 suspended = 0; 1514 td = curthread; 1515 fs = ump->um_fs; 1516 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) 1517 panic("%s: ffs_sync: modification on read-only filesystem", 1518 fs->fs_fsmnt); 1519 if (waitfor == MNT_LAZY) 1520 return (ffs_sync_lazy(mp)); 1521 1522 /* 1523 * Write back each (modified) inode. 1524 */ 1525 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1526 if (waitfor == MNT_SUSPEND) { 1527 suspend = 1; 1528 waitfor = MNT_WAIT; 1529 } 1530 if (waitfor == MNT_WAIT) { 1531 wait = 1; 1532 lockreq = LK_EXCLUSIVE; 1533 } 1534 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1535 MNT_ILOCK(mp); 1536 loop: 1537 /* Grab snapshot of secondary write counts */ 1538 secondary_writes = mp->mnt_secondary_writes; 1539 secondary_accwrites = mp->mnt_secondary_accwrites; 1540 1541 /* Grab snapshot of softdep dependency counts */ 1542 MNT_IUNLOCK(mp); 1543 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1544 MNT_ILOCK(mp); 1545 1546 MNT_VNODE_FOREACH(vp, mp, mvp) { 1547 /* 1548 * Depend on the vnode interlock to keep things stable enough 1549 * for a quick test. Since there might be hundreds of 1550 * thousands of vnodes, we cannot afford even a subroutine 1551 * call unless there's a good chance that we have work to do. 1552 */ 1553 VI_LOCK(vp); 1554 if (vp->v_iflag & VI_DOOMED) { 1555 VI_UNLOCK(vp); 1556 continue; 1557 } 1558 ip = VTOI(vp); 1559 if (vp->v_type == VNON || ((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 MNT_IUNLOCK(mp); 1566 if ((error = vget(vp, lockreq, td)) != 0) { 1567 MNT_ILOCK(mp); 1568 if (error == ENOENT || error == ENOLCK) { 1569 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1570 goto loop; 1571 } 1572 continue; 1573 } 1574 if ((error = ffs_syncvnode(vp, waitfor, 0)) != 0) 1575 allerror = error; 1576 vput(vp); 1577 MNT_ILOCK(mp); 1578 } 1579 MNT_IUNLOCK(mp); 1580 /* 1581 * Force stale filesystem control information to be flushed. 1582 */ 1583 if (waitfor == MNT_WAIT) { 1584 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1585 allerror = error; 1586 /* Flushed work items may create new vnodes to clean */ 1587 if (allerror == 0 && count) { 1588 MNT_ILOCK(mp); 1589 goto loop; 1590 } 1591 } 1592 #ifdef QUOTA 1593 qsync(mp); 1594 #endif 1595 1596 devvp = ump->um_devvp; 1597 bo = &devvp->v_bufobj; 1598 BO_LOCK(bo); 1599 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1600 BO_UNLOCK(bo); 1601 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1602 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1603 allerror = error; 1604 VOP_UNLOCK(devvp, 0); 1605 if (allerror == 0 && waitfor == MNT_WAIT) { 1606 MNT_ILOCK(mp); 1607 goto loop; 1608 } 1609 } else if (suspend != 0) { 1610 if (softdep_check_suspend(mp, 1611 devvp, 1612 softdep_deps, 1613 softdep_accdeps, 1614 secondary_writes, 1615 secondary_accwrites) != 0) 1616 goto loop; /* More work needed */ 1617 mtx_assert(MNT_MTX(mp), MA_OWNED); 1618 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1619 MNT_IUNLOCK(mp); 1620 suspended = 1; 1621 } else 1622 BO_UNLOCK(bo); 1623 /* 1624 * Write back modified superblock. 1625 */ 1626 if (fs->fs_fmod != 0 && 1627 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1628 allerror = error; 1629 return (allerror); 1630 } 1631 1632 int 1633 ffs_vget(mp, ino, flags, vpp) 1634 struct mount *mp; 1635 ino_t ino; 1636 int flags; 1637 struct vnode **vpp; 1638 { 1639 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1640 } 1641 1642 int 1643 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1644 struct mount *mp; 1645 ino_t ino; 1646 int flags; 1647 struct vnode **vpp; 1648 int ffs_flags; 1649 { 1650 struct fs *fs; 1651 struct inode *ip; 1652 struct ufsmount *ump; 1653 struct buf *bp; 1654 struct vnode *vp; 1655 struct cdev *dev; 1656 int error; 1657 1658 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1659 if (error || *vpp != NULL) 1660 return (error); 1661 1662 /* 1663 * We must promote to an exclusive lock for vnode creation. This 1664 * can happen if lookup is passed LOCKSHARED. 1665 */ 1666 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1667 flags &= ~LK_TYPE_MASK; 1668 flags |= LK_EXCLUSIVE; 1669 } 1670 1671 /* 1672 * We do not lock vnode creation as it is believed to be too 1673 * expensive for such rare case as simultaneous creation of vnode 1674 * for same ino by different processes. We just allow them to race 1675 * and check later to decide who wins. Let the race begin! 1676 */ 1677 1678 ump = VFSTOUFS(mp); 1679 dev = ump->um_dev; 1680 fs = ump->um_fs; 1681 1682 /* 1683 * If this malloc() is performed after the getnewvnode() 1684 * it might block, leaving a vnode with a NULL v_data to be 1685 * found by ffs_sync() if a sync happens to fire right then, 1686 * which will cause a panic because ffs_sync() blindly 1687 * dereferences vp->v_data (as well it should). 1688 */ 1689 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1690 1691 /* Allocate a new vnode/inode. */ 1692 if (fs->fs_magic == FS_UFS1_MAGIC) 1693 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1694 else 1695 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1696 if (error) { 1697 *vpp = NULL; 1698 uma_zfree(uma_inode, ip); 1699 return (error); 1700 } 1701 /* 1702 * FFS supports recursive locking. 1703 */ 1704 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1705 VN_LOCK_AREC(vp); 1706 vp->v_data = ip; 1707 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1708 ip->i_vnode = vp; 1709 ip->i_ump = ump; 1710 ip->i_fs = fs; 1711 ip->i_dev = dev; 1712 ip->i_number = ino; 1713 ip->i_ea_refs = 0; 1714 #ifdef QUOTA 1715 { 1716 int i; 1717 for (i = 0; i < MAXQUOTAS; i++) 1718 ip->i_dquot[i] = NODQUOT; 1719 } 1720 #endif 1721 1722 if (ffs_flags & FFSV_FORCEINSMQ) 1723 vp->v_vflag |= VV_FORCEINSMQ; 1724 error = insmntque(vp, mp); 1725 if (error != 0) { 1726 uma_zfree(uma_inode, ip); 1727 *vpp = NULL; 1728 return (error); 1729 } 1730 vp->v_vflag &= ~VV_FORCEINSMQ; 1731 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1732 if (error || *vpp != NULL) 1733 return (error); 1734 1735 /* Read in the disk contents for the inode, copy into the inode. */ 1736 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1737 (int)fs->fs_bsize, NOCRED, &bp); 1738 if (error) { 1739 /* 1740 * The inode does not contain anything useful, so it would 1741 * be misleading to leave it on its hash chain. With mode 1742 * still zero, it will be unlinked and returned to the free 1743 * list by vput(). 1744 */ 1745 brelse(bp); 1746 vput(vp); 1747 *vpp = NULL; 1748 return (error); 1749 } 1750 if (ip->i_ump->um_fstype == UFS1) 1751 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1752 else 1753 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1754 ffs_load_inode(bp, ip, fs, ino); 1755 if (DOINGSOFTDEP(vp)) 1756 softdep_load_inodeblock(ip); 1757 else 1758 ip->i_effnlink = ip->i_nlink; 1759 bqrelse(bp); 1760 1761 /* 1762 * Initialize the vnode from the inode, check for aliases. 1763 * Note that the underlying vnode may have changed. 1764 */ 1765 if (ip->i_ump->um_fstype == UFS1) 1766 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1767 else 1768 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1769 if (error) { 1770 vput(vp); 1771 *vpp = NULL; 1772 return (error); 1773 } 1774 1775 /* 1776 * Finish inode initialization. 1777 */ 1778 if (vp->v_type != VFIFO) { 1779 /* FFS supports shared locking for all files except fifos. */ 1780 VN_LOCK_ASHARE(vp); 1781 } 1782 1783 /* 1784 * Set up a generation number for this inode if it does not 1785 * already have one. This should only happen on old filesystems. 1786 */ 1787 if (ip->i_gen == 0) { 1788 ip->i_gen = arc4random() / 2 + 1; 1789 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1790 ip->i_flag |= IN_MODIFIED; 1791 DIP_SET(ip, i_gen, ip->i_gen); 1792 } 1793 } 1794 #ifdef MAC 1795 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1796 /* 1797 * If this vnode is already allocated, and we're running 1798 * multi-label, attempt to perform a label association 1799 * from the extended attributes on the inode. 1800 */ 1801 error = mac_vnode_associate_extattr(mp, vp); 1802 if (error) { 1803 /* ufs_inactive will release ip->i_devvp ref. */ 1804 vput(vp); 1805 *vpp = NULL; 1806 return (error); 1807 } 1808 } 1809 #endif 1810 1811 *vpp = vp; 1812 return (0); 1813 } 1814 1815 /* 1816 * File handle to vnode 1817 * 1818 * Have to be really careful about stale file handles: 1819 * - check that the inode number is valid 1820 * - call ffs_vget() to get the locked inode 1821 * - check for an unallocated inode (i_mode == 0) 1822 * - check that the given client host has export rights and return 1823 * those rights via. exflagsp and credanonp 1824 */ 1825 static int 1826 ffs_fhtovp(mp, fhp, flags, vpp) 1827 struct mount *mp; 1828 struct fid *fhp; 1829 int flags; 1830 struct vnode **vpp; 1831 { 1832 struct ufid *ufhp; 1833 struct fs *fs; 1834 1835 ufhp = (struct ufid *)fhp; 1836 fs = VFSTOUFS(mp)->um_fs; 1837 if (ufhp->ufid_ino < ROOTINO || 1838 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1839 return (ESTALE); 1840 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1841 } 1842 1843 /* 1844 * Initialize the filesystem. 1845 */ 1846 static int 1847 ffs_init(vfsp) 1848 struct vfsconf *vfsp; 1849 { 1850 1851 softdep_initialize(); 1852 return (ufs_init(vfsp)); 1853 } 1854 1855 /* 1856 * Undo the work of ffs_init(). 1857 */ 1858 static int 1859 ffs_uninit(vfsp) 1860 struct vfsconf *vfsp; 1861 { 1862 int ret; 1863 1864 ret = ufs_uninit(vfsp); 1865 softdep_uninitialize(); 1866 return (ret); 1867 } 1868 1869 /* 1870 * Write a superblock and associated information back to disk. 1871 */ 1872 int 1873 ffs_sbupdate(ump, waitfor, suspended) 1874 struct ufsmount *ump; 1875 int waitfor; 1876 int suspended; 1877 { 1878 struct fs *fs = ump->um_fs; 1879 struct buf *sbbp; 1880 struct buf *bp; 1881 int blks; 1882 void *space; 1883 int i, size, error, allerror = 0; 1884 1885 if (fs->fs_ronly == 1 && 1886 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1887 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1888 panic("ffs_sbupdate: write read-only filesystem"); 1889 /* 1890 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1891 */ 1892 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1893 (int)fs->fs_sbsize, 0, 0, 0); 1894 /* 1895 * First write back the summary information. 1896 */ 1897 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1898 space = fs->fs_csp; 1899 for (i = 0; i < blks; i += fs->fs_frag) { 1900 size = fs->fs_bsize; 1901 if (i + fs->fs_frag > blks) 1902 size = (blks - i) * fs->fs_fsize; 1903 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1904 size, 0, 0, 0); 1905 bcopy(space, bp->b_data, (u_int)size); 1906 space = (char *)space + size; 1907 if (suspended) 1908 bp->b_flags |= B_VALIDSUSPWRT; 1909 if (waitfor != MNT_WAIT) 1910 bawrite(bp); 1911 else if ((error = bwrite(bp)) != 0) 1912 allerror = error; 1913 } 1914 /* 1915 * Now write back the superblock itself. If any errors occurred 1916 * up to this point, then fail so that the superblock avoids 1917 * being written out as clean. 1918 */ 1919 if (allerror) { 1920 brelse(sbbp); 1921 return (allerror); 1922 } 1923 bp = sbbp; 1924 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1925 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1926 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1927 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1928 fs->fs_sblockloc = SBLOCK_UFS1; 1929 } 1930 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1931 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1932 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1933 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1934 fs->fs_sblockloc = SBLOCK_UFS2; 1935 } 1936 fs->fs_fmod = 0; 1937 fs->fs_time = time_second; 1938 if (fs->fs_flags & FS_DOSOFTDEP) 1939 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1940 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1941 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1942 if (suspended) 1943 bp->b_flags |= B_VALIDSUSPWRT; 1944 if (waitfor != MNT_WAIT) 1945 bawrite(bp); 1946 else if ((error = bwrite(bp)) != 0) 1947 allerror = error; 1948 return (allerror); 1949 } 1950 1951 static int 1952 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1953 int attrnamespace, const char *attrname) 1954 { 1955 1956 #ifdef UFS_EXTATTR 1957 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1958 attrname)); 1959 #else 1960 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1961 attrname)); 1962 #endif 1963 } 1964 1965 static void 1966 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1967 { 1968 1969 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1970 uma_zfree(uma_ufs1, ip->i_din1); 1971 else if (ip->i_din2 != NULL) 1972 uma_zfree(uma_ufs2, ip->i_din2); 1973 uma_zfree(uma_inode, ip); 1974 } 1975 1976 static int dobkgrdwrite = 1; 1977 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1978 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1979 1980 /* 1981 * Complete a background write started from bwrite. 1982 */ 1983 static void 1984 ffs_backgroundwritedone(struct buf *bp) 1985 { 1986 struct bufobj *bufobj; 1987 struct buf *origbp; 1988 1989 /* 1990 * Find the original buffer that we are writing. 1991 */ 1992 bufobj = bp->b_bufobj; 1993 BO_LOCK(bufobj); 1994 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1995 panic("backgroundwritedone: lost buffer"); 1996 /* Grab an extra reference to be dropped by the bufdone() below. */ 1997 bufobj_wrefl(bufobj); 1998 BO_UNLOCK(bufobj); 1999 /* 2000 * Process dependencies then return any unfinished ones. 2001 */ 2002 if (!LIST_EMPTY(&bp->b_dep)) 2003 buf_complete(bp); 2004 #ifdef SOFTUPDATES 2005 if (!LIST_EMPTY(&bp->b_dep)) 2006 softdep_move_dependencies(bp, origbp); 2007 #endif 2008 /* 2009 * This buffer is marked B_NOCACHE so when it is released 2010 * by biodone it will be tossed. 2011 */ 2012 bp->b_flags |= B_NOCACHE; 2013 bp->b_flags &= ~B_CACHE; 2014 bufdone(bp); 2015 BO_LOCK(bufobj); 2016 /* 2017 * Clear the BV_BKGRDINPROG flag in the original buffer 2018 * and awaken it if it is waiting for the write to complete. 2019 * If BV_BKGRDINPROG is not set in the original buffer it must 2020 * have been released and re-instantiated - which is not legal. 2021 */ 2022 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2023 ("backgroundwritedone: lost buffer2")); 2024 origbp->b_vflags &= ~BV_BKGRDINPROG; 2025 if (origbp->b_vflags & BV_BKGRDWAIT) { 2026 origbp->b_vflags &= ~BV_BKGRDWAIT; 2027 wakeup(&origbp->b_xflags); 2028 } 2029 BO_UNLOCK(bufobj); 2030 } 2031 2032 2033 /* 2034 * Write, release buffer on completion. (Done by iodone 2035 * if async). Do not bother writing anything if the buffer 2036 * is invalid. 2037 * 2038 * Note that we set B_CACHE here, indicating that buffer is 2039 * fully valid and thus cacheable. This is true even of NFS 2040 * now so we set it generally. This could be set either here 2041 * or in biodone() since the I/O is synchronous. We put it 2042 * here. 2043 */ 2044 static int 2045 ffs_bufwrite(struct buf *bp) 2046 { 2047 int oldflags, s; 2048 struct buf *newbp; 2049 2050 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2051 if (bp->b_flags & B_INVAL) { 2052 brelse(bp); 2053 return (0); 2054 } 2055 2056 oldflags = bp->b_flags; 2057 2058 if (!BUF_ISLOCKED(bp)) 2059 panic("bufwrite: buffer is not busy???"); 2060 s = splbio(); 2061 /* 2062 * If a background write is already in progress, delay 2063 * writing this block if it is asynchronous. Otherwise 2064 * wait for the background write to complete. 2065 */ 2066 BO_LOCK(bp->b_bufobj); 2067 if (bp->b_vflags & BV_BKGRDINPROG) { 2068 if (bp->b_flags & B_ASYNC) { 2069 BO_UNLOCK(bp->b_bufobj); 2070 splx(s); 2071 bdwrite(bp); 2072 return (0); 2073 } 2074 bp->b_vflags |= BV_BKGRDWAIT; 2075 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 2076 if (bp->b_vflags & BV_BKGRDINPROG) 2077 panic("bufwrite: still writing"); 2078 } 2079 BO_UNLOCK(bp->b_bufobj); 2080 2081 /* 2082 * If this buffer is marked for background writing and we 2083 * do not have to wait for it, make a copy and write the 2084 * copy so as to leave this buffer ready for further use. 2085 * 2086 * This optimization eats a lot of memory. If we have a page 2087 * or buffer shortfall we can't do it. 2088 */ 2089 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2090 (bp->b_flags & B_ASYNC) && 2091 !vm_page_count_severe() && 2092 !buf_dirty_count_severe()) { 2093 KASSERT(bp->b_iodone == NULL, 2094 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2095 2096 /* get a new block */ 2097 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2098 if (newbp == NULL) 2099 goto normal_write; 2100 2101 /* 2102 * set it to be identical to the old block. We have to 2103 * set b_lblkno and BKGRDMARKER before calling bgetvp() 2104 * to avoid confusing the splay tree and gbincore(). 2105 */ 2106 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2107 newbp->b_lblkno = bp->b_lblkno; 2108 newbp->b_xflags |= BX_BKGRDMARKER; 2109 BO_LOCK(bp->b_bufobj); 2110 bp->b_vflags |= BV_BKGRDINPROG; 2111 bgetvp(bp->b_vp, newbp); 2112 BO_UNLOCK(bp->b_bufobj); 2113 newbp->b_bufobj = &bp->b_vp->v_bufobj; 2114 newbp->b_blkno = bp->b_blkno; 2115 newbp->b_offset = bp->b_offset; 2116 newbp->b_iodone = ffs_backgroundwritedone; 2117 newbp->b_flags |= B_ASYNC; 2118 newbp->b_flags &= ~B_INVAL; 2119 2120 #ifdef SOFTUPDATES 2121 /* 2122 * Move over the dependencies. If there are rollbacks, 2123 * leave the parent buffer dirtied as it will need to 2124 * be written again. 2125 */ 2126 if (LIST_EMPTY(&bp->b_dep) || 2127 softdep_move_dependencies(bp, newbp) == 0) 2128 bundirty(bp); 2129 #else 2130 bundirty(bp); 2131 #endif 2132 2133 /* 2134 * Initiate write on the copy, release the original to 2135 * the B_LOCKED queue so that it cannot go away until 2136 * the background write completes. If not locked it could go 2137 * away and then be reconstituted while it was being written. 2138 * If the reconstituted buffer were written, we could end up 2139 * with two background copies being written at the same time. 2140 */ 2141 bqrelse(bp); 2142 bp = newbp; 2143 } else 2144 /* Mark the buffer clean */ 2145 bundirty(bp); 2146 2147 2148 /* Let the normal bufwrite do the rest for us */ 2149 normal_write: 2150 return (bufwrite(bp)); 2151 } 2152 2153 2154 static void 2155 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2156 { 2157 struct vnode *vp; 2158 int error; 2159 struct buf *tbp; 2160 int nocopy; 2161 2162 vp = bo->__bo_vnode; 2163 if (bp->b_iocmd == BIO_WRITE) { 2164 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2165 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2166 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2167 panic("ffs_geom_strategy: bad I/O"); 2168 nocopy = bp->b_flags & B_NOCOPY; 2169 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2170 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2171 vp->v_rdev->si_snapdata != NULL) { 2172 if ((bp->b_flags & B_CLUSTER) != 0) { 2173 runningbufwakeup(bp); 2174 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2175 b_cluster.cluster_entry) { 2176 error = ffs_copyonwrite(vp, tbp); 2177 if (error != 0 && 2178 error != EOPNOTSUPP) { 2179 bp->b_error = error; 2180 bp->b_ioflags |= BIO_ERROR; 2181 bufdone(bp); 2182 return; 2183 } 2184 } 2185 bp->b_runningbufspace = bp->b_bufsize; 2186 atomic_add_long(&runningbufspace, 2187 bp->b_runningbufspace); 2188 } else { 2189 error = ffs_copyonwrite(vp, bp); 2190 if (error != 0 && error != EOPNOTSUPP) { 2191 bp->b_error = error; 2192 bp->b_ioflags |= BIO_ERROR; 2193 bufdone(bp); 2194 return; 2195 } 2196 } 2197 } 2198 #ifdef SOFTUPDATES 2199 if ((bp->b_flags & B_CLUSTER) != 0) { 2200 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2201 b_cluster.cluster_entry) { 2202 if (!LIST_EMPTY(&tbp->b_dep)) 2203 buf_start(tbp); 2204 } 2205 } else { 2206 if (!LIST_EMPTY(&bp->b_dep)) 2207 buf_start(bp); 2208 } 2209 2210 #endif 2211 } 2212 g_vfs_strategy(bo, bp); 2213 } 2214 2215 #ifdef DDB 2216 2217 static void 2218 db_print_ffs(struct ufsmount *ump) 2219 { 2220 db_printf("mp %p %s devvp %p fs %p su_wl %d su_deps %d su_req %d\n", 2221 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 2222 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 2223 ump->softdep_deps, ump->softdep_req); 2224 } 2225 2226 DB_SHOW_COMMAND(ffs, db_show_ffs) 2227 { 2228 struct mount *mp; 2229 struct ufsmount *ump; 2230 2231 if (have_addr) { 2232 ump = VFSTOUFS((struct mount *)addr); 2233 db_print_ffs(ump); 2234 return; 2235 } 2236 2237 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2238 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2239 db_print_ffs(VFSTOUFS(mp)); 2240 } 2241 } 2242 2243 #endif /* DDB */ 2244