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 size = fs->fs_cssize; 679 blks = howmany(size, fs->fs_fsize); 680 if (fs->fs_contigsumsize > 0) 681 size += fs->fs_ncg * sizeof(int32_t); 682 size += fs->fs_ncg * sizeof(u_int8_t); 683 free(fs->fs_csp, M_UFSMNT); 684 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 685 fs->fs_csp = space; 686 for (i = 0; i < blks; i += fs->fs_frag) { 687 size = fs->fs_bsize; 688 if (i + fs->fs_frag > blks) 689 size = (blks - i) * fs->fs_fsize; 690 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 691 NOCRED, &bp); 692 if (error) 693 return (error); 694 bcopy(bp->b_data, space, (u_int)size); 695 space = (char *)space + size; 696 brelse(bp); 697 } 698 /* 699 * We no longer know anything about clusters per cylinder group. 700 */ 701 if (fs->fs_contigsumsize > 0) { 702 fs->fs_maxcluster = lp = space; 703 for (i = 0; i < fs->fs_ncg; i++) 704 *lp++ = fs->fs_contigsumsize; 705 space = lp; 706 } 707 size = fs->fs_ncg * sizeof(u_int8_t); 708 fs->fs_contigdirs = (u_int8_t *)space; 709 bzero(fs->fs_contigdirs, size); 710 711 loop: 712 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 713 /* 714 * Step 4: invalidate all cached file data. 715 */ 716 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 717 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 718 goto loop; 719 } 720 if (vinvalbuf(vp, 0, 0, 0)) 721 panic("ffs_reload: dirty2"); 722 /* 723 * Step 5: re-read inode data for all active vnodes. 724 */ 725 ip = VTOI(vp); 726 error = 727 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 728 (int)fs->fs_bsize, NOCRED, &bp); 729 if (error) { 730 VOP_UNLOCK(vp, 0); 731 vrele(vp); 732 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 733 return (error); 734 } 735 ffs_load_inode(bp, ip, fs, ip->i_number); 736 ip->i_effnlink = ip->i_nlink; 737 brelse(bp); 738 VOP_UNLOCK(vp, 0); 739 vrele(vp); 740 } 741 return (0); 742 } 743 744 /* 745 * Possible superblock locations ordered from most to least likely. 746 */ 747 static int sblock_try[] = SBLOCKSEARCH; 748 749 /* 750 * Common code for mount and mountroot 751 */ 752 static int 753 ffs_mountfs(devvp, mp, td) 754 struct vnode *devvp; 755 struct mount *mp; 756 struct thread *td; 757 { 758 struct ufsmount *ump; 759 struct buf *bp; 760 struct fs *fs; 761 struct cdev *dev; 762 void *space; 763 ufs2_daddr_t sblockloc; 764 int error, i, blks, size, ronly; 765 int32_t *lp; 766 struct ucred *cred; 767 struct g_consumer *cp; 768 struct mount *nmp; 769 770 bp = NULL; 771 ump = NULL; 772 cred = td ? td->td_ucred : NOCRED; 773 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 774 775 dev = devvp->v_rdev; 776 dev_ref(dev); 777 DROP_GIANT(); 778 g_topology_lock(); 779 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 780 g_topology_unlock(); 781 PICKUP_GIANT(); 782 VOP_UNLOCK(devvp, 0); 783 if (error) 784 goto out; 785 if (devvp->v_rdev->si_iosize_max != 0) 786 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 787 if (mp->mnt_iosize_max > MAXPHYS) 788 mp->mnt_iosize_max = MAXPHYS; 789 790 devvp->v_bufobj.bo_ops = &ffs_ops; 791 792 fs = NULL; 793 sblockloc = 0; 794 /* 795 * Try reading the superblock in each of its possible locations. 796 */ 797 for (i = 0; sblock_try[i] != -1; i++) { 798 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 799 error = EINVAL; 800 vfs_mount_error(mp, 801 "Invalid sectorsize %d for superblock size %d", 802 cp->provider->sectorsize, SBLOCKSIZE); 803 goto out; 804 } 805 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 806 cred, &bp)) != 0) 807 goto out; 808 fs = (struct fs *)bp->b_data; 809 sblockloc = sblock_try[i]; 810 if ((fs->fs_magic == FS_UFS1_MAGIC || 811 (fs->fs_magic == FS_UFS2_MAGIC && 812 (fs->fs_sblockloc == sblockloc || 813 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 814 fs->fs_bsize <= MAXBSIZE && 815 fs->fs_bsize >= sizeof(struct fs)) 816 break; 817 brelse(bp); 818 bp = NULL; 819 } 820 if (sblock_try[i] == -1) { 821 error = EINVAL; /* XXX needs translation */ 822 goto out; 823 } 824 fs->fs_fmod = 0; 825 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 826 fs->fs_flags &= ~FS_UNCLEAN; 827 if (fs->fs_clean == 0) { 828 fs->fs_flags |= FS_UNCLEAN; 829 if (ronly || (mp->mnt_flag & MNT_FORCE) || 830 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 831 (fs->fs_flags & FS_DOSOFTDEP))) { 832 printf("WARNING: %s was not properly dismounted\n", 833 fs->fs_fsmnt); 834 } else { 835 vfs_mount_error(mp, "R/W mount of %s denied. %s%s", 836 fs->fs_fsmnt, "Filesystem is not clean - run fsck.", 837 (fs->fs_flags & FS_SUJ) == 0 ? "" : 838 " Forced mount will invalidate journal contents"); 839 error = EPERM; 840 goto out; 841 } 842 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 843 (mp->mnt_flag & MNT_FORCE)) { 844 printf("WARNING: %s: lost blocks %jd files %d\n", 845 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 846 fs->fs_pendinginodes); 847 fs->fs_pendingblocks = 0; 848 fs->fs_pendinginodes = 0; 849 } 850 } 851 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 852 printf("WARNING: %s: mount pending error: blocks %jd " 853 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 854 fs->fs_pendinginodes); 855 fs->fs_pendingblocks = 0; 856 fs->fs_pendinginodes = 0; 857 } 858 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 859 #ifdef UFS_GJOURNAL 860 /* 861 * Get journal provider name. 862 */ 863 size = 1024; 864 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 865 if (g_io_getattr("GJOURNAL::provider", cp, &size, 866 mp->mnt_gjprovider) == 0) { 867 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 868 M_UFSMNT, M_WAITOK); 869 MNT_ILOCK(mp); 870 mp->mnt_flag |= MNT_GJOURNAL; 871 MNT_IUNLOCK(mp); 872 } else { 873 printf("WARNING: %s: GJOURNAL flag on fs " 874 "but no gjournal provider below\n", 875 mp->mnt_stat.f_mntonname); 876 free(mp->mnt_gjprovider, M_UFSMNT); 877 mp->mnt_gjprovider = NULL; 878 } 879 #else 880 printf("WARNING: %s: GJOURNAL flag on fs but no " 881 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 882 #endif 883 } else { 884 mp->mnt_gjprovider = NULL; 885 } 886 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 887 ump->um_cp = cp; 888 ump->um_bo = &devvp->v_bufobj; 889 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 890 if (fs->fs_magic == FS_UFS1_MAGIC) { 891 ump->um_fstype = UFS1; 892 ump->um_balloc = ffs_balloc_ufs1; 893 } else { 894 ump->um_fstype = UFS2; 895 ump->um_balloc = ffs_balloc_ufs2; 896 } 897 ump->um_blkatoff = ffs_blkatoff; 898 ump->um_truncate = ffs_truncate; 899 ump->um_update = ffs_update; 900 ump->um_valloc = ffs_valloc; 901 ump->um_vfree = ffs_vfree; 902 ump->um_ifree = ffs_ifree; 903 ump->um_rdonly = ffs_rdonly; 904 ump->um_snapgone = ffs_snapgone; 905 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 906 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 907 if (fs->fs_sbsize < SBLOCKSIZE) 908 bp->b_flags |= B_INVAL | B_NOCACHE; 909 brelse(bp); 910 bp = NULL; 911 fs = ump->um_fs; 912 ffs_oldfscompat_read(fs, ump, sblockloc); 913 fs->fs_ronly = ronly; 914 size = fs->fs_cssize; 915 blks = howmany(size, fs->fs_fsize); 916 if (fs->fs_contigsumsize > 0) 917 size += fs->fs_ncg * sizeof(int32_t); 918 size += fs->fs_ncg * sizeof(u_int8_t); 919 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 920 fs->fs_csp = space; 921 for (i = 0; i < blks; i += fs->fs_frag) { 922 size = fs->fs_bsize; 923 if (i + fs->fs_frag > blks) 924 size = (blks - i) * fs->fs_fsize; 925 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 926 cred, &bp)) != 0) { 927 free(fs->fs_csp, M_UFSMNT); 928 goto out; 929 } 930 bcopy(bp->b_data, space, (u_int)size); 931 space = (char *)space + size; 932 brelse(bp); 933 bp = NULL; 934 } 935 if (fs->fs_contigsumsize > 0) { 936 fs->fs_maxcluster = lp = space; 937 for (i = 0; i < fs->fs_ncg; i++) 938 *lp++ = fs->fs_contigsumsize; 939 space = lp; 940 } 941 size = fs->fs_ncg * sizeof(u_int8_t); 942 fs->fs_contigdirs = (u_int8_t *)space; 943 bzero(fs->fs_contigdirs, size); 944 fs->fs_active = NULL; 945 mp->mnt_data = ump; 946 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 947 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 948 nmp = NULL; 949 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 950 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 951 if (nmp) 952 vfs_rel(nmp); 953 vfs_getnewfsid(mp); 954 } 955 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 956 MNT_ILOCK(mp); 957 mp->mnt_flag |= MNT_LOCAL; 958 MNT_IUNLOCK(mp); 959 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 960 #ifdef MAC 961 MNT_ILOCK(mp); 962 mp->mnt_flag |= MNT_MULTILABEL; 963 MNT_IUNLOCK(mp); 964 #else 965 printf("WARNING: %s: multilabel flag on fs but " 966 "no MAC support\n", mp->mnt_stat.f_mntonname); 967 #endif 968 } 969 if ((fs->fs_flags & FS_ACLS) != 0) { 970 #ifdef UFS_ACL 971 MNT_ILOCK(mp); 972 973 if (mp->mnt_flag & MNT_NFS4ACLS) 974 printf("WARNING: %s: ACLs flag on fs conflicts with " 975 "\"nfsv4acls\" mount option; option ignored\n", 976 mp->mnt_stat.f_mntonname); 977 mp->mnt_flag &= ~MNT_NFS4ACLS; 978 mp->mnt_flag |= MNT_ACLS; 979 980 MNT_IUNLOCK(mp); 981 #else 982 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 983 mp->mnt_stat.f_mntonname); 984 #endif 985 } 986 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 987 #ifdef UFS_ACL 988 MNT_ILOCK(mp); 989 990 if (mp->mnt_flag & MNT_ACLS) 991 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 992 "with \"acls\" mount option; option ignored\n", 993 mp->mnt_stat.f_mntonname); 994 mp->mnt_flag &= ~MNT_ACLS; 995 mp->mnt_flag |= MNT_NFS4ACLS; 996 997 MNT_IUNLOCK(mp); 998 #else 999 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 1000 "ACLs support\n", mp->mnt_stat.f_mntonname); 1001 #endif 1002 } 1003 if ((fs->fs_flags & FS_TRIM) != 0) { 1004 size = sizeof(int); 1005 if (g_io_getattr("GEOM::candelete", cp, &size, 1006 &ump->um_candelete) == 0) { 1007 if (!ump->um_candelete) 1008 printf("WARNING: %s: TRIM flag on fs but disk " 1009 "does not support TRIM\n", 1010 mp->mnt_stat.f_mntonname); 1011 } else { 1012 printf("WARNING: %s: TRIM flag on fs but disk does " 1013 "not confirm that it supports TRIM\n", 1014 mp->mnt_stat.f_mntonname); 1015 ump->um_candelete = 0; 1016 } 1017 } 1018 1019 ump->um_mountp = mp; 1020 ump->um_dev = dev; 1021 ump->um_devvp = devvp; 1022 ump->um_nindir = fs->fs_nindir; 1023 ump->um_bptrtodb = fs->fs_fsbtodb; 1024 ump->um_seqinc = fs->fs_frag; 1025 for (i = 0; i < MAXQUOTAS; i++) 1026 ump->um_quotas[i] = NULLVP; 1027 #ifdef UFS_EXTATTR 1028 ufs_extattr_uepm_init(&ump->um_extattr); 1029 #endif 1030 /* 1031 * Set FS local "last mounted on" information (NULL pad) 1032 */ 1033 bzero(fs->fs_fsmnt, MAXMNTLEN); 1034 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1035 mp->mnt_stat.f_iosize = fs->fs_bsize; 1036 1037 if (mp->mnt_flag & MNT_ROOTFS) { 1038 /* 1039 * Root mount; update timestamp in mount structure. 1040 * this will be used by the common root mount code 1041 * to update the system clock. 1042 */ 1043 mp->mnt_time = fs->fs_time; 1044 } 1045 1046 if (ronly == 0) { 1047 fs->fs_mtime = time_second; 1048 if ((fs->fs_flags & FS_DOSOFTDEP) && 1049 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1050 free(fs->fs_csp, M_UFSMNT); 1051 ffs_flushfiles(mp, FORCECLOSE, td); 1052 goto out; 1053 } 1054 if (devvp->v_type == VCHR && devvp->v_rdev != NULL) 1055 devvp->v_rdev->si_mountpt = mp; 1056 if (fs->fs_snapinum[0] != 0) 1057 ffs_snapshot_mount(mp); 1058 fs->fs_fmod = 1; 1059 fs->fs_clean = 0; 1060 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1061 } 1062 /* 1063 * Initialize filesystem stat information in mount struct. 1064 */ 1065 MNT_ILOCK(mp); 1066 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 1067 MNTK_EXTENDED_SHARED | MNTK_NO_IOPF; 1068 MNT_IUNLOCK(mp); 1069 #ifdef UFS_EXTATTR 1070 #ifdef UFS_EXTATTR_AUTOSTART 1071 /* 1072 * 1073 * Auto-starting does the following: 1074 * - check for /.attribute in the fs, and extattr_start if so 1075 * - for each file in .attribute, enable that file with 1076 * an attribute of the same name. 1077 * Not clear how to report errors -- probably eat them. 1078 * This would all happen while the filesystem was busy/not 1079 * available, so would effectively be "atomic". 1080 */ 1081 (void) ufs_extattr_autostart(mp, td); 1082 #endif /* !UFS_EXTATTR_AUTOSTART */ 1083 #endif /* !UFS_EXTATTR */ 1084 return (0); 1085 out: 1086 if (bp) 1087 brelse(bp); 1088 if (cp != NULL) { 1089 DROP_GIANT(); 1090 g_topology_lock(); 1091 g_vfs_close(cp); 1092 g_topology_unlock(); 1093 PICKUP_GIANT(); 1094 } 1095 if (ump) { 1096 mtx_destroy(UFS_MTX(ump)); 1097 if (mp->mnt_gjprovider != NULL) { 1098 free(mp->mnt_gjprovider, M_UFSMNT); 1099 mp->mnt_gjprovider = NULL; 1100 } 1101 free(ump->um_fs, M_UFSMNT); 1102 free(ump, M_UFSMNT); 1103 mp->mnt_data = NULL; 1104 } 1105 dev_rel(dev); 1106 return (error); 1107 } 1108 1109 #include <sys/sysctl.h> 1110 static int bigcgs = 0; 1111 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1112 1113 /* 1114 * Sanity checks for loading old filesystem superblocks. 1115 * See ffs_oldfscompat_write below for unwound actions. 1116 * 1117 * XXX - Parts get retired eventually. 1118 * Unfortunately new bits get added. 1119 */ 1120 static void 1121 ffs_oldfscompat_read(fs, ump, sblockloc) 1122 struct fs *fs; 1123 struct ufsmount *ump; 1124 ufs2_daddr_t sblockloc; 1125 { 1126 off_t maxfilesize; 1127 1128 /* 1129 * If not yet done, update fs_flags location and value of fs_sblockloc. 1130 */ 1131 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1132 fs->fs_flags = fs->fs_old_flags; 1133 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1134 fs->fs_sblockloc = sblockloc; 1135 } 1136 /* 1137 * If not yet done, update UFS1 superblock with new wider fields. 1138 */ 1139 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1140 fs->fs_maxbsize = fs->fs_bsize; 1141 fs->fs_time = fs->fs_old_time; 1142 fs->fs_size = fs->fs_old_size; 1143 fs->fs_dsize = fs->fs_old_dsize; 1144 fs->fs_csaddr = fs->fs_old_csaddr; 1145 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1146 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1147 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1148 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1149 } 1150 if (fs->fs_magic == FS_UFS1_MAGIC && 1151 fs->fs_old_inodefmt < FS_44INODEFMT) { 1152 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1153 fs->fs_qbmask = ~fs->fs_bmask; 1154 fs->fs_qfmask = ~fs->fs_fmask; 1155 } 1156 if (fs->fs_magic == FS_UFS1_MAGIC) { 1157 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1158 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1159 if (fs->fs_maxfilesize > maxfilesize) 1160 fs->fs_maxfilesize = maxfilesize; 1161 } 1162 /* Compatibility for old filesystems */ 1163 if (fs->fs_avgfilesize <= 0) 1164 fs->fs_avgfilesize = AVFILESIZ; 1165 if (fs->fs_avgfpdir <= 0) 1166 fs->fs_avgfpdir = AFPDIR; 1167 if (bigcgs) { 1168 fs->fs_save_cgsize = fs->fs_cgsize; 1169 fs->fs_cgsize = fs->fs_bsize; 1170 } 1171 } 1172 1173 /* 1174 * Unwinding superblock updates for old filesystems. 1175 * See ffs_oldfscompat_read above for details. 1176 * 1177 * XXX - Parts get retired eventually. 1178 * Unfortunately new bits get added. 1179 */ 1180 void 1181 ffs_oldfscompat_write(fs, ump) 1182 struct fs *fs; 1183 struct ufsmount *ump; 1184 { 1185 1186 /* 1187 * Copy back UFS2 updated fields that UFS1 inspects. 1188 */ 1189 if (fs->fs_magic == FS_UFS1_MAGIC) { 1190 fs->fs_old_time = fs->fs_time; 1191 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1192 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1193 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1194 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1195 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1196 } 1197 if (bigcgs) { 1198 fs->fs_cgsize = fs->fs_save_cgsize; 1199 fs->fs_save_cgsize = 0; 1200 } 1201 } 1202 1203 /* 1204 * unmount system call 1205 */ 1206 static int 1207 ffs_unmount(mp, mntflags) 1208 struct mount *mp; 1209 int mntflags; 1210 { 1211 struct thread *td; 1212 struct ufsmount *ump = VFSTOUFS(mp); 1213 struct fs *fs; 1214 int error, flags, susp; 1215 #ifdef UFS_EXTATTR 1216 int e_restart; 1217 #endif 1218 1219 flags = 0; 1220 td = curthread; 1221 fs = ump->um_fs; 1222 susp = 0; 1223 if (mntflags & MNT_FORCE) { 1224 flags |= FORCECLOSE; 1225 susp = fs->fs_ronly != 0; 1226 } 1227 #ifdef UFS_EXTATTR 1228 if ((error = ufs_extattr_stop(mp, td))) { 1229 if (error != EOPNOTSUPP) 1230 printf("WARNING: unmount %s: ufs_extattr_stop " 1231 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1232 error); 1233 e_restart = 0; 1234 } else { 1235 ufs_extattr_uepm_destroy(&ump->um_extattr); 1236 e_restart = 1; 1237 } 1238 #endif 1239 if (susp) { 1240 /* 1241 * dounmount already called vn_start_write(). 1242 */ 1243 for (;;) { 1244 vn_finished_write(mp); 1245 if ((error = vfs_write_suspend(mp)) != 0) 1246 return (error); 1247 MNT_ILOCK(mp); 1248 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1249 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1250 MNTK_SUSPEND2); 1251 wakeup(&mp->mnt_flag); 1252 MNT_IUNLOCK(mp); 1253 td->td_pflags |= TDP_IGNSUSP; 1254 break; 1255 } 1256 MNT_IUNLOCK(mp); 1257 vn_start_write(NULL, &mp, V_WAIT); 1258 } 1259 } 1260 if (MOUNTEDSOFTDEP(mp)) 1261 error = softdep_flushfiles(mp, flags, td); 1262 else 1263 error = ffs_flushfiles(mp, flags, td); 1264 if (error != 0 && error != ENXIO) 1265 goto fail; 1266 1267 UFS_LOCK(ump); 1268 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1269 printf("WARNING: unmount %s: pending error: blocks %jd " 1270 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1271 fs->fs_pendinginodes); 1272 fs->fs_pendingblocks = 0; 1273 fs->fs_pendinginodes = 0; 1274 } 1275 UFS_UNLOCK(ump); 1276 softdep_unmount(mp); 1277 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1278 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1279 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1280 if (error && error != ENXIO) { 1281 fs->fs_clean = 0; 1282 goto fail; 1283 } 1284 } 1285 if (susp) { 1286 vfs_write_resume(mp); 1287 vn_start_write(NULL, &mp, V_WAIT); 1288 } 1289 DROP_GIANT(); 1290 g_topology_lock(); 1291 if (ump->um_fsckpid > 0) { 1292 /* 1293 * Return to normal read-only mode. 1294 */ 1295 error = g_access(ump->um_cp, 0, -1, 0); 1296 ump->um_fsckpid = 0; 1297 } 1298 g_vfs_close(ump->um_cp); 1299 g_topology_unlock(); 1300 PICKUP_GIANT(); 1301 if (ump->um_devvp->v_type == VCHR && ump->um_devvp->v_rdev != NULL) 1302 ump->um_devvp->v_rdev->si_mountpt = NULL; 1303 vrele(ump->um_devvp); 1304 dev_rel(ump->um_dev); 1305 mtx_destroy(UFS_MTX(ump)); 1306 if (mp->mnt_gjprovider != NULL) { 1307 free(mp->mnt_gjprovider, M_UFSMNT); 1308 mp->mnt_gjprovider = NULL; 1309 } 1310 free(fs->fs_csp, M_UFSMNT); 1311 free(fs, M_UFSMNT); 1312 free(ump, M_UFSMNT); 1313 mp->mnt_data = NULL; 1314 MNT_ILOCK(mp); 1315 mp->mnt_flag &= ~MNT_LOCAL; 1316 MNT_IUNLOCK(mp); 1317 return (error); 1318 1319 fail: 1320 if (susp) { 1321 vfs_write_resume(mp); 1322 vn_start_write(NULL, &mp, V_WAIT); 1323 } 1324 #ifdef UFS_EXTATTR 1325 if (e_restart) { 1326 ufs_extattr_uepm_init(&ump->um_extattr); 1327 #ifdef UFS_EXTATTR_AUTOSTART 1328 (void) ufs_extattr_autostart(mp, td); 1329 #endif 1330 } 1331 #endif 1332 1333 return (error); 1334 } 1335 1336 /* 1337 * Flush out all the files in a filesystem. 1338 */ 1339 int 1340 ffs_flushfiles(mp, flags, td) 1341 struct mount *mp; 1342 int flags; 1343 struct thread *td; 1344 { 1345 struct ufsmount *ump; 1346 int error; 1347 1348 ump = VFSTOUFS(mp); 1349 #ifdef QUOTA 1350 if (mp->mnt_flag & MNT_QUOTA) { 1351 int i; 1352 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1353 if (error) 1354 return (error); 1355 for (i = 0; i < MAXQUOTAS; i++) { 1356 quotaoff(td, mp, i); 1357 } 1358 /* 1359 * Here we fall through to vflush again to ensure 1360 * that we have gotten rid of all the system vnodes. 1361 */ 1362 } 1363 #endif 1364 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1365 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1366 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1367 return (error); 1368 ffs_snapshot_unmount(mp); 1369 flags |= FORCECLOSE; 1370 /* 1371 * Here we fall through to vflush again to ensure 1372 * that we have gotten rid of all the system vnodes. 1373 */ 1374 } 1375 /* 1376 * Flush all the files. 1377 */ 1378 if ((error = vflush(mp, 0, flags, td)) != 0) 1379 return (error); 1380 /* 1381 * Flush filesystem metadata. 1382 */ 1383 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1384 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1385 VOP_UNLOCK(ump->um_devvp, 0); 1386 return (error); 1387 } 1388 1389 /* 1390 * Get filesystem statistics. 1391 */ 1392 static int 1393 ffs_statfs(mp, sbp) 1394 struct mount *mp; 1395 struct statfs *sbp; 1396 { 1397 struct ufsmount *ump; 1398 struct fs *fs; 1399 1400 ump = VFSTOUFS(mp); 1401 fs = ump->um_fs; 1402 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1403 panic("ffs_statfs"); 1404 sbp->f_version = STATFS_VERSION; 1405 sbp->f_bsize = fs->fs_fsize; 1406 sbp->f_iosize = fs->fs_bsize; 1407 sbp->f_blocks = fs->fs_dsize; 1408 UFS_LOCK(ump); 1409 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1410 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1411 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1412 dbtofsb(fs, fs->fs_pendingblocks); 1413 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1414 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1415 UFS_UNLOCK(ump); 1416 sbp->f_namemax = NAME_MAX; 1417 return (0); 1418 } 1419 1420 /* 1421 * For a lazy sync, we only care about access times, quotas and the 1422 * superblock. Other filesystem changes are already converted to 1423 * cylinder group blocks or inode blocks updates and are written to 1424 * disk by syncer. 1425 */ 1426 static int 1427 ffs_sync_lazy(mp) 1428 struct mount *mp; 1429 { 1430 struct vnode *mvp, *vp; 1431 struct inode *ip; 1432 struct thread *td; 1433 int allerror, error; 1434 1435 allerror = 0; 1436 td = curthread; 1437 if ((mp->mnt_flag & MNT_NOATIME) != 0) 1438 goto qupdate; 1439 MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) { 1440 if (vp->v_type == VNON) { 1441 VI_UNLOCK(vp); 1442 continue; 1443 } 1444 ip = VTOI(vp); 1445 1446 /* 1447 * The IN_ACCESS flag is converted to IN_MODIFIED by 1448 * ufs_close() and ufs_getattr() by the calls to 1449 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1450 * Test also all the other timestamp flags too, to pick up 1451 * any other cases that could be missed. 1452 */ 1453 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1454 IN_UPDATE)) == 0) { 1455 VI_UNLOCK(vp); 1456 continue; 1457 } 1458 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, 1459 td)) != 0) 1460 continue; 1461 error = ffs_update(vp, 0); 1462 if (error != 0) 1463 allerror = error; 1464 vput(vp); 1465 } 1466 1467 qupdate: 1468 #ifdef QUOTA 1469 qsync(mp); 1470 #endif 1471 1472 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1473 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1474 allerror = error; 1475 return (allerror); 1476 } 1477 1478 /* 1479 * Go through the disk queues to initiate sandbagged IO; 1480 * go through the inodes to write those that have been modified; 1481 * initiate the writing of the super block if it has been modified. 1482 * 1483 * Note: we are always called with the filesystem marked busy using 1484 * vfs_busy(). 1485 */ 1486 static int 1487 ffs_sync(mp, waitfor) 1488 struct mount *mp; 1489 int waitfor; 1490 { 1491 struct vnode *mvp, *vp, *devvp; 1492 struct thread *td; 1493 struct inode *ip; 1494 struct ufsmount *ump = VFSTOUFS(mp); 1495 struct fs *fs; 1496 int error, count, wait, lockreq, allerror = 0; 1497 int suspend; 1498 int suspended; 1499 int secondary_writes; 1500 int secondary_accwrites; 1501 int softdep_deps; 1502 int softdep_accdeps; 1503 struct bufobj *bo; 1504 1505 wait = 0; 1506 suspend = 0; 1507 suspended = 0; 1508 td = curthread; 1509 fs = ump->um_fs; 1510 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) 1511 panic("%s: ffs_sync: modification on read-only filesystem", 1512 fs->fs_fsmnt); 1513 if (waitfor == MNT_LAZY) 1514 return (ffs_sync_lazy(mp)); 1515 1516 /* 1517 * Write back each (modified) inode. 1518 */ 1519 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1520 if (waitfor == MNT_SUSPEND) { 1521 suspend = 1; 1522 waitfor = MNT_WAIT; 1523 } 1524 if (waitfor == MNT_WAIT) { 1525 wait = 1; 1526 lockreq = LK_EXCLUSIVE; 1527 } 1528 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1529 loop: 1530 /* Grab snapshot of secondary write counts */ 1531 MNT_ILOCK(mp); 1532 secondary_writes = mp->mnt_secondary_writes; 1533 secondary_accwrites = mp->mnt_secondary_accwrites; 1534 MNT_IUNLOCK(mp); 1535 1536 /* Grab snapshot of softdep dependency counts */ 1537 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1538 1539 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1540 /* 1541 * Depend on the vnode interlock to keep things stable enough 1542 * for a quick test. Since there might be hundreds of 1543 * thousands of vnodes, we cannot afford even a subroutine 1544 * call unless there's a good chance that we have work to do. 1545 */ 1546 if (vp->v_type == VNON) { 1547 VI_UNLOCK(vp); 1548 continue; 1549 } 1550 ip = VTOI(vp); 1551 if ((ip->i_flag & 1552 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1553 vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1554 VI_UNLOCK(vp); 1555 continue; 1556 } 1557 if ((error = vget(vp, lockreq, td)) != 0) { 1558 if (error == ENOENT || error == ENOLCK) { 1559 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1560 goto loop; 1561 } 1562 continue; 1563 } 1564 if ((error = ffs_syncvnode(vp, waitfor, 0)) != 0) 1565 allerror = error; 1566 vput(vp); 1567 } 1568 /* 1569 * Force stale filesystem control information to be flushed. 1570 */ 1571 if (waitfor == MNT_WAIT) { 1572 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1573 allerror = error; 1574 /* Flushed work items may create new vnodes to clean */ 1575 if (allerror == 0 && count) 1576 goto loop; 1577 } 1578 #ifdef QUOTA 1579 qsync(mp); 1580 #endif 1581 1582 devvp = ump->um_devvp; 1583 bo = &devvp->v_bufobj; 1584 BO_LOCK(bo); 1585 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1586 BO_UNLOCK(bo); 1587 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1588 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1589 allerror = error; 1590 VOP_UNLOCK(devvp, 0); 1591 if (allerror == 0 && waitfor == MNT_WAIT) 1592 goto loop; 1593 } else if (suspend != 0) { 1594 if (softdep_check_suspend(mp, 1595 devvp, 1596 softdep_deps, 1597 softdep_accdeps, 1598 secondary_writes, 1599 secondary_accwrites) != 0) { 1600 MNT_IUNLOCK(mp); 1601 goto loop; /* More work needed */ 1602 } 1603 mtx_assert(MNT_MTX(mp), MA_OWNED); 1604 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1605 MNT_IUNLOCK(mp); 1606 suspended = 1; 1607 } else 1608 BO_UNLOCK(bo); 1609 /* 1610 * Write back modified superblock. 1611 */ 1612 if (fs->fs_fmod != 0 && 1613 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1614 allerror = error; 1615 return (allerror); 1616 } 1617 1618 int 1619 ffs_vget(mp, ino, flags, vpp) 1620 struct mount *mp; 1621 ino_t ino; 1622 int flags; 1623 struct vnode **vpp; 1624 { 1625 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1626 } 1627 1628 int 1629 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1630 struct mount *mp; 1631 ino_t ino; 1632 int flags; 1633 struct vnode **vpp; 1634 int ffs_flags; 1635 { 1636 struct fs *fs; 1637 struct inode *ip; 1638 struct ufsmount *ump; 1639 struct buf *bp; 1640 struct vnode *vp; 1641 struct cdev *dev; 1642 int error; 1643 1644 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1645 if (error || *vpp != NULL) 1646 return (error); 1647 1648 /* 1649 * We must promote to an exclusive lock for vnode creation. This 1650 * can happen if lookup is passed LOCKSHARED. 1651 */ 1652 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1653 flags &= ~LK_TYPE_MASK; 1654 flags |= LK_EXCLUSIVE; 1655 } 1656 1657 /* 1658 * We do not lock vnode creation as it is believed to be too 1659 * expensive for such rare case as simultaneous creation of vnode 1660 * for same ino by different processes. We just allow them to race 1661 * and check later to decide who wins. Let the race begin! 1662 */ 1663 1664 ump = VFSTOUFS(mp); 1665 dev = ump->um_dev; 1666 fs = ump->um_fs; 1667 1668 /* 1669 * If this malloc() is performed after the getnewvnode() 1670 * it might block, leaving a vnode with a NULL v_data to be 1671 * found by ffs_sync() if a sync happens to fire right then, 1672 * which will cause a panic because ffs_sync() blindly 1673 * dereferences vp->v_data (as well it should). 1674 */ 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 softdep_initialize(); 1838 return (ufs_init(vfsp)); 1839 } 1840 1841 /* 1842 * Undo the work of ffs_init(). 1843 */ 1844 static int 1845 ffs_uninit(vfsp) 1846 struct vfsconf *vfsp; 1847 { 1848 int ret; 1849 1850 ret = ufs_uninit(vfsp); 1851 softdep_uninitialize(); 1852 return (ret); 1853 } 1854 1855 /* 1856 * Write a superblock and associated information back to disk. 1857 */ 1858 int 1859 ffs_sbupdate(ump, waitfor, suspended) 1860 struct ufsmount *ump; 1861 int waitfor; 1862 int suspended; 1863 { 1864 struct fs *fs = ump->um_fs; 1865 struct buf *sbbp; 1866 struct buf *bp; 1867 int blks; 1868 void *space; 1869 int i, size, error, allerror = 0; 1870 1871 if (fs->fs_ronly == 1 && 1872 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1873 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1874 panic("ffs_sbupdate: write read-only filesystem"); 1875 /* 1876 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1877 */ 1878 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1879 (int)fs->fs_sbsize, 0, 0, 0); 1880 /* 1881 * First write back the summary information. 1882 */ 1883 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1884 space = fs->fs_csp; 1885 for (i = 0; i < blks; i += fs->fs_frag) { 1886 size = fs->fs_bsize; 1887 if (i + fs->fs_frag > blks) 1888 size = (blks - i) * fs->fs_fsize; 1889 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1890 size, 0, 0, 0); 1891 bcopy(space, bp->b_data, (u_int)size); 1892 space = (char *)space + size; 1893 if (suspended) 1894 bp->b_flags |= B_VALIDSUSPWRT; 1895 if (waitfor != MNT_WAIT) 1896 bawrite(bp); 1897 else if ((error = bwrite(bp)) != 0) 1898 allerror = error; 1899 } 1900 /* 1901 * Now write back the superblock itself. If any errors occurred 1902 * up to this point, then fail so that the superblock avoids 1903 * being written out as clean. 1904 */ 1905 if (allerror) { 1906 brelse(sbbp); 1907 return (allerror); 1908 } 1909 bp = sbbp; 1910 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1911 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1912 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1913 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1914 fs->fs_sblockloc = SBLOCK_UFS1; 1915 } 1916 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1917 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1918 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1919 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1920 fs->fs_sblockloc = SBLOCK_UFS2; 1921 } 1922 fs->fs_fmod = 0; 1923 fs->fs_time = time_second; 1924 if (fs->fs_flags & FS_DOSOFTDEP) 1925 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1926 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1927 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1928 if (suspended) 1929 bp->b_flags |= B_VALIDSUSPWRT; 1930 if (waitfor != MNT_WAIT) 1931 bawrite(bp); 1932 else if ((error = bwrite(bp)) != 0) 1933 allerror = error; 1934 return (allerror); 1935 } 1936 1937 static int 1938 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1939 int attrnamespace, const char *attrname) 1940 { 1941 1942 #ifdef UFS_EXTATTR 1943 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1944 attrname)); 1945 #else 1946 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1947 attrname)); 1948 #endif 1949 } 1950 1951 static void 1952 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1953 { 1954 1955 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1956 uma_zfree(uma_ufs1, ip->i_din1); 1957 else if (ip->i_din2 != NULL) 1958 uma_zfree(uma_ufs2, ip->i_din2); 1959 uma_zfree(uma_inode, ip); 1960 } 1961 1962 static int dobkgrdwrite = 1; 1963 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1964 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1965 1966 /* 1967 * Complete a background write started from bwrite. 1968 */ 1969 static void 1970 ffs_backgroundwritedone(struct buf *bp) 1971 { 1972 struct bufobj *bufobj; 1973 struct buf *origbp; 1974 1975 /* 1976 * Find the original buffer that we are writing. 1977 */ 1978 bufobj = bp->b_bufobj; 1979 BO_LOCK(bufobj); 1980 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1981 panic("backgroundwritedone: lost buffer"); 1982 /* Grab an extra reference to be dropped by the bufdone() below. */ 1983 bufobj_wrefl(bufobj); 1984 BO_UNLOCK(bufobj); 1985 /* 1986 * Process dependencies then return any unfinished ones. 1987 */ 1988 if (!LIST_EMPTY(&bp->b_dep)) 1989 buf_complete(bp); 1990 #ifdef SOFTUPDATES 1991 if (!LIST_EMPTY(&bp->b_dep)) 1992 softdep_move_dependencies(bp, origbp); 1993 #endif 1994 /* 1995 * This buffer is marked B_NOCACHE so when it is released 1996 * by biodone it will be tossed. 1997 */ 1998 bp->b_flags |= B_NOCACHE; 1999 bp->b_flags &= ~B_CACHE; 2000 bufdone(bp); 2001 BO_LOCK(bufobj); 2002 /* 2003 * Clear the BV_BKGRDINPROG flag in the original buffer 2004 * and awaken it if it is waiting for the write to complete. 2005 * If BV_BKGRDINPROG is not set in the original buffer it must 2006 * have been released and re-instantiated - which is not legal. 2007 */ 2008 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2009 ("backgroundwritedone: lost buffer2")); 2010 origbp->b_vflags &= ~BV_BKGRDINPROG; 2011 if (origbp->b_vflags & BV_BKGRDWAIT) { 2012 origbp->b_vflags &= ~BV_BKGRDWAIT; 2013 wakeup(&origbp->b_xflags); 2014 } 2015 BO_UNLOCK(bufobj); 2016 } 2017 2018 2019 /* 2020 * Write, release buffer on completion. (Done by iodone 2021 * if async). Do not bother writing anything if the buffer 2022 * is invalid. 2023 * 2024 * Note that we set B_CACHE here, indicating that buffer is 2025 * fully valid and thus cacheable. This is true even of NFS 2026 * now so we set it generally. This could be set either here 2027 * or in biodone() since the I/O is synchronous. We put it 2028 * here. 2029 */ 2030 static int 2031 ffs_bufwrite(struct buf *bp) 2032 { 2033 int oldflags, s; 2034 struct buf *newbp; 2035 2036 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2037 if (bp->b_flags & B_INVAL) { 2038 brelse(bp); 2039 return (0); 2040 } 2041 2042 oldflags = bp->b_flags; 2043 2044 if (!BUF_ISLOCKED(bp)) 2045 panic("bufwrite: buffer is not busy???"); 2046 s = splbio(); 2047 /* 2048 * If a background write is already in progress, delay 2049 * writing this block if it is asynchronous. Otherwise 2050 * wait for the background write to complete. 2051 */ 2052 BO_LOCK(bp->b_bufobj); 2053 if (bp->b_vflags & BV_BKGRDINPROG) { 2054 if (bp->b_flags & B_ASYNC) { 2055 BO_UNLOCK(bp->b_bufobj); 2056 splx(s); 2057 bdwrite(bp); 2058 return (0); 2059 } 2060 bp->b_vflags |= BV_BKGRDWAIT; 2061 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 2062 if (bp->b_vflags & BV_BKGRDINPROG) 2063 panic("bufwrite: still writing"); 2064 } 2065 BO_UNLOCK(bp->b_bufobj); 2066 2067 /* 2068 * If this buffer is marked for background writing and we 2069 * do not have to wait for it, make a copy and write the 2070 * copy so as to leave this buffer ready for further use. 2071 * 2072 * This optimization eats a lot of memory. If we have a page 2073 * or buffer shortfall we can't do it. 2074 */ 2075 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2076 (bp->b_flags & B_ASYNC) && 2077 !vm_page_count_severe() && 2078 !buf_dirty_count_severe()) { 2079 KASSERT(bp->b_iodone == NULL, 2080 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2081 2082 /* get a new block */ 2083 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2084 if (newbp == NULL) 2085 goto normal_write; 2086 2087 /* 2088 * set it to be identical to the old block. We have to 2089 * set b_lblkno and BKGRDMARKER before calling bgetvp() 2090 * to avoid confusing the splay tree and gbincore(). 2091 */ 2092 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2093 newbp->b_lblkno = bp->b_lblkno; 2094 newbp->b_xflags |= BX_BKGRDMARKER; 2095 BO_LOCK(bp->b_bufobj); 2096 bp->b_vflags |= BV_BKGRDINPROG; 2097 bgetvp(bp->b_vp, newbp); 2098 BO_UNLOCK(bp->b_bufobj); 2099 newbp->b_bufobj = &bp->b_vp->v_bufobj; 2100 newbp->b_blkno = bp->b_blkno; 2101 newbp->b_offset = bp->b_offset; 2102 newbp->b_iodone = ffs_backgroundwritedone; 2103 newbp->b_flags |= B_ASYNC; 2104 newbp->b_flags &= ~B_INVAL; 2105 2106 #ifdef SOFTUPDATES 2107 /* 2108 * Move over the dependencies. If there are rollbacks, 2109 * leave the parent buffer dirtied as it will need to 2110 * be written again. 2111 */ 2112 if (LIST_EMPTY(&bp->b_dep) || 2113 softdep_move_dependencies(bp, newbp) == 0) 2114 bundirty(bp); 2115 #else 2116 bundirty(bp); 2117 #endif 2118 2119 /* 2120 * Initiate write on the copy, release the original to 2121 * the B_LOCKED queue so that it cannot go away until 2122 * the background write completes. If not locked it could go 2123 * away and then be reconstituted while it was being written. 2124 * If the reconstituted buffer were written, we could end up 2125 * with two background copies being written at the same time. 2126 */ 2127 bqrelse(bp); 2128 bp = newbp; 2129 } else 2130 /* Mark the buffer clean */ 2131 bundirty(bp); 2132 2133 2134 /* Let the normal bufwrite do the rest for us */ 2135 normal_write: 2136 return (bufwrite(bp)); 2137 } 2138 2139 2140 static void 2141 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2142 { 2143 struct vnode *vp; 2144 int error; 2145 struct buf *tbp; 2146 int nocopy; 2147 2148 vp = bo->__bo_vnode; 2149 if (bp->b_iocmd == BIO_WRITE) { 2150 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2151 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2152 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2153 panic("ffs_geom_strategy: bad I/O"); 2154 nocopy = bp->b_flags & B_NOCOPY; 2155 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2156 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2157 vp->v_rdev->si_snapdata != NULL) { 2158 if ((bp->b_flags & B_CLUSTER) != 0) { 2159 runningbufwakeup(bp); 2160 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2161 b_cluster.cluster_entry) { 2162 error = ffs_copyonwrite(vp, tbp); 2163 if (error != 0 && 2164 error != EOPNOTSUPP) { 2165 bp->b_error = error; 2166 bp->b_ioflags |= BIO_ERROR; 2167 bufdone(bp); 2168 return; 2169 } 2170 } 2171 bp->b_runningbufspace = bp->b_bufsize; 2172 atomic_add_long(&runningbufspace, 2173 bp->b_runningbufspace); 2174 } else { 2175 error = ffs_copyonwrite(vp, bp); 2176 if (error != 0 && error != EOPNOTSUPP) { 2177 bp->b_error = error; 2178 bp->b_ioflags |= BIO_ERROR; 2179 bufdone(bp); 2180 return; 2181 } 2182 } 2183 } 2184 #ifdef SOFTUPDATES 2185 if ((bp->b_flags & B_CLUSTER) != 0) { 2186 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2187 b_cluster.cluster_entry) { 2188 if (!LIST_EMPTY(&tbp->b_dep)) 2189 buf_start(tbp); 2190 } 2191 } else { 2192 if (!LIST_EMPTY(&bp->b_dep)) 2193 buf_start(bp); 2194 } 2195 2196 #endif 2197 } 2198 g_vfs_strategy(bo, bp); 2199 } 2200 2201 #ifdef DDB 2202 2203 static void 2204 db_print_ffs(struct ufsmount *ump) 2205 { 2206 db_printf("mp %p %s devvp %p fs %p su_wl %d su_deps %d su_req %d\n", 2207 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 2208 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 2209 ump->softdep_deps, ump->softdep_req); 2210 } 2211 2212 DB_SHOW_COMMAND(ffs, db_show_ffs) 2213 { 2214 struct mount *mp; 2215 struct ufsmount *ump; 2216 2217 if (have_addr) { 2218 ump = VFSTOUFS((struct mount *)addr); 2219 db_print_ffs(ump); 2220 return; 2221 } 2222 2223 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2224 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2225 db_print_ffs(VFSTOUFS(mp)); 2226 } 2227 } 2228 2229 #endif /* DDB */ 2230