1/*- 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD$"); 34 35#include "opt_quota.h" 36#include "opt_ufs.h" 37#include "opt_ffs.h" 38#include "opt_ddb.h" 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/namei.h> 43#include <sys/priv.h> 44#include <sys/proc.h> 45#include <sys/kernel.h> 46#include <sys/vnode.h> 47#include <sys/mount.h> 48#include <sys/bio.h> 49#include <sys/buf.h> 50#include <sys/conf.h> 51#include <sys/fcntl.h> 52#include <sys/ioccom.h> 53#include <sys/malloc.h> 54#include <sys/mutex.h> 55 56#include <security/mac/mac_framework.h> 57 58#include <ufs/ufs/extattr.h> 59#include <ufs/ufs/gjournal.h> 60#include <ufs/ufs/quota.h> 61#include <ufs/ufs/ufsmount.h> 62#include <ufs/ufs/inode.h> 63#include <ufs/ufs/ufs_extern.h> 64 65#include <ufs/ffs/fs.h> 66#include <ufs/ffs/ffs_extern.h> 67 68#include <vm/vm.h> 69#include <vm/uma.h> 70#include <vm/vm_page.h> 71 72#include <geom/geom.h> 73#include <geom/geom_vfs.h> 74 75#include <ddb/ddb.h> 76 77static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 78 79static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 80static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 81 ufs2_daddr_t); 82static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 83static int ffs_sync_lazy(struct mount *mp); 84 85static vfs_init_t ffs_init; 86static vfs_uninit_t ffs_uninit; 87static vfs_extattrctl_t ffs_extattrctl; 88static vfs_cmount_t ffs_cmount; 89static vfs_unmount_t ffs_unmount; 90static vfs_mount_t ffs_mount; 91static vfs_statfs_t ffs_statfs; 92static vfs_fhtovp_t ffs_fhtovp; 93static vfs_sync_t ffs_sync; 94 95static 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 111VFS_SET(ufs_vfsops, ufs, 0); 112MODULE_VERSION(ufs, 1); 113 114static b_strategy_t ffs_geom_strategy; 115static b_write_t ffs_bufwrite; 116 117static 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 */ 135static 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 140static int 141ffs_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)) != 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 575static int 576ffs_cmount(struct mntarg *ma, void *data, uint64_t flags) 577{ 578 struct ufs_args args; 579 struct export_args exp; 580 int error; 581 582 if (data == NULL) 583 return (EINVAL); 584 error = copyin(data, &args, sizeof args); 585 if (error) 586 return (error); 587 vfs_oexport_conv(&args.export, &exp); 588 589 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 590 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 591 error = kernel_mount(ma, flags); 592 593 return (error); 594} 595 596/* 597 * Reload all incore data for a filesystem (used after running fsck on 598 * the root filesystem and finding things to fix). If the 'force' flag 599 * is 0, the filesystem must be mounted read-only. 600 * 601 * Things to do to update the mount: 602 * 1) invalidate all cached meta-data. 603 * 2) re-read superblock from disk. 604 * 3) re-read summary information from disk. 605 * 4) invalidate all inactive vnodes. 606 * 5) invalidate all cached file data. 607 * 6) re-read inode data for all active vnodes. 608 */ 609int 610ffs_reload(struct mount *mp, struct thread *td, int force) 611{ 612 struct vnode *vp, *mvp, *devvp; 613 struct inode *ip; 614 void *space; 615 struct buf *bp; 616 struct fs *fs, *newfs; 617 struct ufsmount *ump; 618 ufs2_daddr_t sblockloc; 619 int i, blks, size, error; 620 int32_t *lp; 621 622 ump = VFSTOUFS(mp); 623 624 MNT_ILOCK(mp); 625 if ((mp->mnt_flag & MNT_RDONLY) == 0 && force == 0) { 626 MNT_IUNLOCK(mp); 627 return (EINVAL); 628 } 629 MNT_IUNLOCK(mp); 630 631 /* 632 * Step 1: invalidate all cached meta-data. 633 */ 634 devvp = VFSTOUFS(mp)->um_devvp; 635 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 636 if (vinvalbuf(devvp, 0, 0, 0) != 0) 637 panic("ffs_reload: dirty1"); 638 VOP_UNLOCK(devvp, 0); 639 640 /* 641 * Step 2: re-read superblock from disk. 642 */ 643 fs = VFSTOUFS(mp)->um_fs; 644 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 645 NOCRED, &bp)) != 0) 646 return (error); 647 newfs = (struct fs *)bp->b_data; 648 if ((newfs->fs_magic != FS_UFS1_MAGIC && 649 newfs->fs_magic != FS_UFS2_MAGIC) || 650 newfs->fs_bsize > MAXBSIZE || 651 newfs->fs_bsize < sizeof(struct fs)) { 652 brelse(bp); 653 return (EIO); /* XXX needs translation */ 654 } 655 /* 656 * Copy pointer fields back into superblock before copying in XXX 657 * new superblock. These should really be in the ufsmount. XXX 658 * Note that important parameters (eg fs_ncg) are unchanged. 659 */ 660 newfs->fs_csp = fs->fs_csp; 661 newfs->fs_maxcluster = fs->fs_maxcluster; 662 newfs->fs_contigdirs = fs->fs_contigdirs; 663 newfs->fs_active = fs->fs_active; 664 newfs->fs_ronly = fs->fs_ronly; 665 sblockloc = fs->fs_sblockloc; 666 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 667 brelse(bp); 668 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 669 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 670 UFS_LOCK(ump); 671 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 672 printf("WARNING: %s: reload pending error: blocks %jd " 673 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 674 fs->fs_pendinginodes); 675 fs->fs_pendingblocks = 0; 676 fs->fs_pendinginodes = 0; 677 } 678 UFS_UNLOCK(ump); 679 680 /* 681 * Step 3: re-read summary information from disk. 682 */ 683 size = fs->fs_cssize; 684 blks = howmany(size, fs->fs_fsize); 685 if (fs->fs_contigsumsize > 0) 686 size += fs->fs_ncg * sizeof(int32_t); 687 size += fs->fs_ncg * sizeof(u_int8_t); 688 free(fs->fs_csp, M_UFSMNT); 689 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 690 fs->fs_csp = space; 691 for (i = 0; i < blks; i += fs->fs_frag) { 692 size = fs->fs_bsize; 693 if (i + fs->fs_frag > blks) 694 size = (blks - i) * fs->fs_fsize; 695 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 696 NOCRED, &bp); 697 if (error) 698 return (error); 699 bcopy(bp->b_data, space, (u_int)size); 700 space = (char *)space + size; 701 brelse(bp); 702 } 703 /* 704 * We no longer know anything about clusters per cylinder group. 705 */ 706 if (fs->fs_contigsumsize > 0) { 707 fs->fs_maxcluster = lp = space; 708 for (i = 0; i < fs->fs_ncg; i++) 709 *lp++ = fs->fs_contigsumsize; 710 space = lp; 711 } 712 size = fs->fs_ncg * sizeof(u_int8_t); 713 fs->fs_contigdirs = (u_int8_t *)space; 714 bzero(fs->fs_contigdirs, size); 715 716loop: 717 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 718 /* 719 * Skip syncer vnode. 720 */ 721 if (vp->v_type == VNON) { 722 VI_UNLOCK(vp); 723 continue; 724 } 725 /* 726 * Step 4: invalidate all cached file data. 727 */ 728 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 729 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 730 goto loop; 731 } 732 if (vinvalbuf(vp, 0, 0, 0)) 733 panic("ffs_reload: dirty2"); 734 /* 735 * Step 5: re-read inode data for all active vnodes. 736 */ 737 ip = VTOI(vp); 738 error = 739 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 740 (int)fs->fs_bsize, NOCRED, &bp); 741 if (error) { 742 VOP_UNLOCK(vp, 0); 743 vrele(vp); 744 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 745 return (error); 746 } 747 ffs_load_inode(bp, ip, fs, ip->i_number); 748 ip->i_effnlink = ip->i_nlink; 749 brelse(bp); 750 VOP_UNLOCK(vp, 0); 751 vrele(vp); 752 } 753 return (0); 754} 755 756/* 757 * Possible superblock locations ordered from most to least likely. 758 */ 759static int sblock_try[] = SBLOCKSEARCH; 760 761/* 762 * Common code for mount and mountroot 763 */ 764static int 765ffs_mountfs(devvp, mp, td) 766 struct vnode *devvp; 767 struct mount *mp; 768 struct thread *td; 769{ 770 struct ufsmount *ump; 771 struct buf *bp; 772 struct fs *fs; 773 struct cdev *dev; 774 void *space; 775 ufs2_daddr_t sblockloc; 776 int error, i, blks, size, ronly; 777 int32_t *lp; 778 struct ucred *cred; 779 struct g_consumer *cp; 780 struct mount *nmp; 781 782 bp = NULL; 783 ump = NULL; 784 cred = td ? td->td_ucred : NOCRED; 785 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 786 787 dev = devvp->v_rdev; 788 dev_ref(dev); 789 DROP_GIANT(); 790 g_topology_lock(); 791 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 792 g_topology_unlock(); 793 PICKUP_GIANT(); 794 VOP_UNLOCK(devvp, 0); 795 if (error) 796 goto out; 797 if (devvp->v_rdev->si_iosize_max != 0) 798 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 799 if (mp->mnt_iosize_max > MAXPHYS) 800 mp->mnt_iosize_max = MAXPHYS; 801 802 devvp->v_bufobj.bo_ops = &ffs_ops; 803 804 fs = NULL; 805 sblockloc = 0; 806 /* 807 * Try reading the superblock in each of its possible locations. 808 */ 809 for (i = 0; sblock_try[i] != -1; i++) { 810 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 811 error = EINVAL; 812 vfs_mount_error(mp, 813 "Invalid sectorsize %d for superblock size %d", 814 cp->provider->sectorsize, SBLOCKSIZE); 815 goto out; 816 } 817 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 818 cred, &bp)) != 0) 819 goto out; 820 fs = (struct fs *)bp->b_data; 821 sblockloc = sblock_try[i]; 822 if ((fs->fs_magic == FS_UFS1_MAGIC || 823 (fs->fs_magic == FS_UFS2_MAGIC && 824 (fs->fs_sblockloc == sblockloc || 825 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 826 fs->fs_bsize <= MAXBSIZE && 827 fs->fs_bsize >= sizeof(struct fs)) 828 break; 829 brelse(bp); 830 bp = NULL; 831 } 832 if (sblock_try[i] == -1) { 833 error = EINVAL; /* XXX needs translation */ 834 goto out; 835 } 836 fs->fs_fmod = 0; 837 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 838 fs->fs_flags &= ~FS_UNCLEAN; 839 if (fs->fs_clean == 0) { 840 fs->fs_flags |= FS_UNCLEAN; 841 if (ronly || (mp->mnt_flag & MNT_FORCE) || 842 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 843 (fs->fs_flags & FS_DOSOFTDEP))) { 844 printf("WARNING: %s was not properly dismounted\n", 845 fs->fs_fsmnt); 846 } else { 847 vfs_mount_error(mp, "R/W mount of %s denied. %s%s", 848 fs->fs_fsmnt, "Filesystem is not clean - run fsck.", 849 (fs->fs_flags & FS_SUJ) == 0 ? "" : 850 " Forced mount will invalidate journal contents"); 851 error = EPERM; 852 goto out; 853 } 854 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 855 (mp->mnt_flag & MNT_FORCE)) { 856 printf("WARNING: %s: lost blocks %jd files %d\n", 857 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 858 fs->fs_pendinginodes); 859 fs->fs_pendingblocks = 0; 860 fs->fs_pendinginodes = 0; 861 } 862 } 863 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 864 printf("WARNING: %s: mount pending error: blocks %jd " 865 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 866 fs->fs_pendinginodes); 867 fs->fs_pendingblocks = 0; 868 fs->fs_pendinginodes = 0; 869 } 870 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 871#ifdef UFS_GJOURNAL 872 /* 873 * Get journal provider name. 874 */ 875 size = 1024; 876 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 877 if (g_io_getattr("GJOURNAL::provider", cp, &size, 878 mp->mnt_gjprovider) == 0) { 879 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 880 M_UFSMNT, M_WAITOK); 881 MNT_ILOCK(mp); 882 mp->mnt_flag |= MNT_GJOURNAL; 883 MNT_IUNLOCK(mp); 884 } else { 885 printf("WARNING: %s: GJOURNAL flag on fs " 886 "but no gjournal provider below\n", 887 mp->mnt_stat.f_mntonname); 888 free(mp->mnt_gjprovider, M_UFSMNT); 889 mp->mnt_gjprovider = NULL; 890 } 891#else 892 printf("WARNING: %s: GJOURNAL flag on fs but no " 893 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 894#endif 895 } else { 896 mp->mnt_gjprovider = NULL; 897 } 898 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 899 ump->um_cp = cp; 900 ump->um_bo = &devvp->v_bufobj; 901 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 902 if (fs->fs_magic == FS_UFS1_MAGIC) { 903 ump->um_fstype = UFS1; 904 ump->um_balloc = ffs_balloc_ufs1; 905 } else { 906 ump->um_fstype = UFS2; 907 ump->um_balloc = ffs_balloc_ufs2; 908 } 909 ump->um_blkatoff = ffs_blkatoff; 910 ump->um_truncate = ffs_truncate; 911 ump->um_update = ffs_update; 912 ump->um_valloc = ffs_valloc; 913 ump->um_vfree = ffs_vfree; 914 ump->um_ifree = ffs_ifree; 915 ump->um_rdonly = ffs_rdonly; 916 ump->um_snapgone = ffs_snapgone; 917 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 918 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 919 if (fs->fs_sbsize < SBLOCKSIZE) 920 bp->b_flags |= B_INVAL | B_NOCACHE; 921 brelse(bp); 922 bp = NULL; 923 fs = ump->um_fs; 924 ffs_oldfscompat_read(fs, ump, sblockloc); 925 fs->fs_ronly = ronly; 926 size = fs->fs_cssize; 927 blks = howmany(size, fs->fs_fsize); 928 if (fs->fs_contigsumsize > 0) 929 size += fs->fs_ncg * sizeof(int32_t); 930 size += fs->fs_ncg * sizeof(u_int8_t); 931 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 932 fs->fs_csp = space; 933 for (i = 0; i < blks; i += fs->fs_frag) { 934 size = fs->fs_bsize; 935 if (i + fs->fs_frag > blks) 936 size = (blks - i) * fs->fs_fsize; 937 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 938 cred, &bp)) != 0) { 939 free(fs->fs_csp, M_UFSMNT); 940 goto out; 941 } 942 bcopy(bp->b_data, space, (u_int)size); 943 space = (char *)space + size; 944 brelse(bp); 945 bp = NULL; 946 } 947 if (fs->fs_contigsumsize > 0) { 948 fs->fs_maxcluster = lp = space; 949 for (i = 0; i < fs->fs_ncg; i++) 950 *lp++ = fs->fs_contigsumsize; 951 space = lp; 952 } 953 size = fs->fs_ncg * sizeof(u_int8_t); 954 fs->fs_contigdirs = (u_int8_t *)space; 955 bzero(fs->fs_contigdirs, size); 956 fs->fs_active = NULL; 957 mp->mnt_data = ump; 958 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 959 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 960 nmp = NULL; 961 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 962 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 963 if (nmp) 964 vfs_rel(nmp); 965 vfs_getnewfsid(mp); 966 } 967 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 968 MNT_ILOCK(mp); 969 mp->mnt_flag |= MNT_LOCAL; 970 MNT_IUNLOCK(mp); 971 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 972#ifdef MAC 973 MNT_ILOCK(mp); 974 mp->mnt_flag |= MNT_MULTILABEL; 975 MNT_IUNLOCK(mp); 976#else 977 printf("WARNING: %s: multilabel flag on fs but " 978 "no MAC support\n", mp->mnt_stat.f_mntonname); 979#endif 980 } 981 if ((fs->fs_flags & FS_ACLS) != 0) { 982#ifdef UFS_ACL 983 MNT_ILOCK(mp); 984 985 if (mp->mnt_flag & MNT_NFS4ACLS) 986 printf("WARNING: %s: ACLs flag on fs conflicts with " 987 "\"nfsv4acls\" mount option; option ignored\n", 988 mp->mnt_stat.f_mntonname); 989 mp->mnt_flag &= ~MNT_NFS4ACLS; 990 mp->mnt_flag |= MNT_ACLS; 991 992 MNT_IUNLOCK(mp); 993#else 994 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 995 mp->mnt_stat.f_mntonname); 996#endif 997 } 998 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 999#ifdef UFS_ACL 1000 MNT_ILOCK(mp); 1001 1002 if (mp->mnt_flag & MNT_ACLS) 1003 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 1004 "with \"acls\" mount option; option ignored\n", 1005 mp->mnt_stat.f_mntonname); 1006 mp->mnt_flag &= ~MNT_ACLS; 1007 mp->mnt_flag |= MNT_NFS4ACLS; 1008 1009 MNT_IUNLOCK(mp); 1010#else 1011 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 1012 "ACLs support\n", mp->mnt_stat.f_mntonname); 1013#endif 1014 } 1015 if ((fs->fs_flags & FS_TRIM) != 0) { 1016 size = sizeof(int); 1017 if (g_io_getattr("GEOM::candelete", cp, &size, 1018 &ump->um_candelete) == 0) { 1019 if (!ump->um_candelete) 1020 printf("WARNING: %s: TRIM flag on fs but disk " 1021 "does not support TRIM\n", 1022 mp->mnt_stat.f_mntonname); 1023 } else { 1024 printf("WARNING: %s: TRIM flag on fs but disk does " 1025 "not confirm that it supports TRIM\n", 1026 mp->mnt_stat.f_mntonname); 1027 ump->um_candelete = 0; 1028 } 1029 } 1030 1031 ump->um_mountp = mp; 1032 ump->um_dev = dev; 1033 ump->um_devvp = devvp; 1034 ump->um_nindir = fs->fs_nindir; 1035 ump->um_bptrtodb = fs->fs_fsbtodb; 1036 ump->um_seqinc = fs->fs_frag; 1037 for (i = 0; i < MAXQUOTAS; i++) 1038 ump->um_quotas[i] = NULLVP; 1039#ifdef UFS_EXTATTR 1040 ufs_extattr_uepm_init(&ump->um_extattr); 1041#endif 1042 /* 1043 * Set FS local "last mounted on" information (NULL pad) 1044 */ 1045 bzero(fs->fs_fsmnt, MAXMNTLEN); 1046 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1047 mp->mnt_stat.f_iosize = fs->fs_bsize; 1048 1049 if (mp->mnt_flag & MNT_ROOTFS) { 1050 /* 1051 * Root mount; update timestamp in mount structure. 1052 * this will be used by the common root mount code 1053 * to update the system clock. 1054 */ 1055 mp->mnt_time = fs->fs_time; 1056 } 1057 1058 if (ronly == 0) { 1059 fs->fs_mtime = time_second; 1060 if ((fs->fs_flags & FS_DOSOFTDEP) && 1061 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1062 free(fs->fs_csp, M_UFSMNT); 1063 ffs_flushfiles(mp, FORCECLOSE, td); 1064 goto out; 1065 } 1066 if (devvp->v_type == VCHR && devvp->v_rdev != NULL) 1067 devvp->v_rdev->si_mountpt = mp; 1068 if (fs->fs_snapinum[0] != 0) 1069 ffs_snapshot_mount(mp); 1070 fs->fs_fmod = 1; 1071 fs->fs_clean = 0; 1072 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1073 } 1074 /* 1075 * Initialize filesystem stat information in mount struct. 1076 */ 1077 MNT_ILOCK(mp); 1078 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 1079 MNTK_EXTENDED_SHARED | MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS; 1080 MNT_IUNLOCK(mp); 1081#ifdef UFS_EXTATTR 1082#ifdef UFS_EXTATTR_AUTOSTART 1083 /* 1084 * 1085 * Auto-starting does the following: 1086 * - check for /.attribute in the fs, and extattr_start if so 1087 * - for each file in .attribute, enable that file with 1088 * an attribute of the same name. 1089 * Not clear how to report errors -- probably eat them. 1090 * This would all happen while the filesystem was busy/not 1091 * available, so would effectively be "atomic". 1092 */ 1093 (void) ufs_extattr_autostart(mp, td); 1094#endif /* !UFS_EXTATTR_AUTOSTART */ 1095#endif /* !UFS_EXTATTR */ 1096 return (0); 1097out: 1098 if (bp) 1099 brelse(bp); 1100 if (cp != NULL) { 1101 DROP_GIANT(); 1102 g_topology_lock(); 1103 g_vfs_close(cp); 1104 g_topology_unlock(); 1105 PICKUP_GIANT(); 1106 } 1107 if (ump) { 1108 mtx_destroy(UFS_MTX(ump)); 1109 if (mp->mnt_gjprovider != NULL) { 1110 free(mp->mnt_gjprovider, M_UFSMNT); 1111 mp->mnt_gjprovider = NULL; 1112 } 1113 free(ump->um_fs, M_UFSMNT); 1114 free(ump, M_UFSMNT); 1115 mp->mnt_data = NULL; 1116 } 1117 dev_rel(dev); 1118 return (error); 1119} 1120 1121#include <sys/sysctl.h> 1122static int bigcgs = 0; 1123SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1124 1125/* 1126 * Sanity checks for loading old filesystem superblocks. 1127 * See ffs_oldfscompat_write below for unwound actions. 1128 * 1129 * XXX - Parts get retired eventually. 1130 * Unfortunately new bits get added. 1131 */ 1132static void 1133ffs_oldfscompat_read(fs, ump, sblockloc) 1134 struct fs *fs; 1135 struct ufsmount *ump; 1136 ufs2_daddr_t sblockloc; 1137{ 1138 off_t maxfilesize; 1139 1140 /* 1141 * If not yet done, update fs_flags location and value of fs_sblockloc. 1142 */ 1143 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1144 fs->fs_flags = fs->fs_old_flags; 1145 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1146 fs->fs_sblockloc = sblockloc; 1147 } 1148 /* 1149 * If not yet done, update UFS1 superblock with new wider fields. 1150 */ 1151 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1152 fs->fs_maxbsize = fs->fs_bsize; 1153 fs->fs_time = fs->fs_old_time; 1154 fs->fs_size = fs->fs_old_size; 1155 fs->fs_dsize = fs->fs_old_dsize; 1156 fs->fs_csaddr = fs->fs_old_csaddr; 1157 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1158 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1159 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1160 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1161 } 1162 if (fs->fs_magic == FS_UFS1_MAGIC && 1163 fs->fs_old_inodefmt < FS_44INODEFMT) { 1164 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1165 fs->fs_qbmask = ~fs->fs_bmask; 1166 fs->fs_qfmask = ~fs->fs_fmask; 1167 } 1168 if (fs->fs_magic == FS_UFS1_MAGIC) { 1169 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1170 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1171 if (fs->fs_maxfilesize > maxfilesize) 1172 fs->fs_maxfilesize = maxfilesize; 1173 } 1174 /* Compatibility for old filesystems */ 1175 if (fs->fs_avgfilesize <= 0) 1176 fs->fs_avgfilesize = AVFILESIZ; 1177 if (fs->fs_avgfpdir <= 0) 1178 fs->fs_avgfpdir = AFPDIR; 1179 if (bigcgs) { 1180 fs->fs_save_cgsize = fs->fs_cgsize; 1181 fs->fs_cgsize = fs->fs_bsize; 1182 } 1183} 1184 1185/* 1186 * Unwinding superblock updates for old filesystems. 1187 * See ffs_oldfscompat_read above for details. 1188 * 1189 * XXX - Parts get retired eventually. 1190 * Unfortunately new bits get added. 1191 */ 1192void 1193ffs_oldfscompat_write(fs, ump) 1194 struct fs *fs; 1195 struct ufsmount *ump; 1196{ 1197 1198 /* 1199 * Copy back UFS2 updated fields that UFS1 inspects. 1200 */ 1201 if (fs->fs_magic == FS_UFS1_MAGIC) { 1202 fs->fs_old_time = fs->fs_time; 1203 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1204 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1205 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1206 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1207 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1208 } 1209 if (bigcgs) { 1210 fs->fs_cgsize = fs->fs_save_cgsize; 1211 fs->fs_save_cgsize = 0; 1212 } 1213} 1214 1215/* 1216 * unmount system call 1217 */ 1218static int 1219ffs_unmount(mp, mntflags) 1220 struct mount *mp; 1221 int mntflags; 1222{ 1223 struct thread *td; 1224 struct ufsmount *ump = VFSTOUFS(mp); 1225 struct fs *fs; 1226 int error, flags, susp; 1227#ifdef UFS_EXTATTR 1228 int e_restart; 1229#endif 1230 1231 flags = 0; 1232 td = curthread; 1233 fs = ump->um_fs; 1234 susp = 0; 1235 if (mntflags & MNT_FORCE) { 1236 flags |= FORCECLOSE; 1237 susp = fs->fs_ronly != 0; 1238 } 1239#ifdef UFS_EXTATTR 1240 if ((error = ufs_extattr_stop(mp, td))) { 1241 if (error != EOPNOTSUPP) 1242 printf("WARNING: unmount %s: ufs_extattr_stop " 1243 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1244 error); 1245 e_restart = 0; 1246 } else { 1247 ufs_extattr_uepm_destroy(&ump->um_extattr); 1248 e_restart = 1; 1249 } 1250#endif 1251 if (susp) { 1252 /* 1253 * dounmount already called vn_start_write(). 1254 */ 1255 for (;;) { 1256 vn_finished_write(mp); 1257 if ((error = vfs_write_suspend(mp)) != 0) 1258 return (error); 1259 MNT_ILOCK(mp); 1260 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1261 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1262 MNTK_SUSPEND2); 1263 wakeup(&mp->mnt_flag); 1264 MNT_IUNLOCK(mp); 1265 td->td_pflags |= TDP_IGNSUSP; 1266 break; 1267 } 1268 MNT_IUNLOCK(mp); 1269 vn_start_write(NULL, &mp, V_WAIT); 1270 } 1271 } 1272 if (MOUNTEDSOFTDEP(mp)) 1273 error = softdep_flushfiles(mp, flags, td); 1274 else 1275 error = ffs_flushfiles(mp, flags, td); 1276 if (error != 0 && error != ENXIO) 1277 goto fail; 1278 1279 UFS_LOCK(ump); 1280 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1281 printf("WARNING: unmount %s: pending error: blocks %jd " 1282 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1283 fs->fs_pendinginodes); 1284 fs->fs_pendingblocks = 0; 1285 fs->fs_pendinginodes = 0; 1286 } 1287 UFS_UNLOCK(ump); 1288 softdep_unmount(mp); 1289 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1290 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1291 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1292 if (error && error != ENXIO) { 1293 fs->fs_clean = 0; 1294 goto fail; 1295 } 1296 } 1297 if (susp) { 1298 vfs_write_resume(mp); 1299 vn_start_write(NULL, &mp, V_WAIT); 1300 } 1301 DROP_GIANT(); 1302 g_topology_lock(); 1303 if (ump->um_fsckpid > 0) { 1304 /* 1305 * Return to normal read-only mode. 1306 */ 1307 error = g_access(ump->um_cp, 0, -1, 0); 1308 ump->um_fsckpid = 0; 1309 } 1310 g_vfs_close(ump->um_cp); 1311 g_topology_unlock(); 1312 PICKUP_GIANT(); 1313 if (ump->um_devvp->v_type == VCHR && ump->um_devvp->v_rdev != NULL) 1314 ump->um_devvp->v_rdev->si_mountpt = NULL; 1315 vrele(ump->um_devvp); 1316 dev_rel(ump->um_dev); 1317 mtx_destroy(UFS_MTX(ump)); 1318 if (mp->mnt_gjprovider != NULL) { 1319 free(mp->mnt_gjprovider, M_UFSMNT); 1320 mp->mnt_gjprovider = NULL; 1321 } 1322 free(fs->fs_csp, M_UFSMNT); 1323 free(fs, M_UFSMNT); 1324 free(ump, M_UFSMNT); 1325 mp->mnt_data = NULL; 1326 MNT_ILOCK(mp); 1327 mp->mnt_flag &= ~MNT_LOCAL; 1328 MNT_IUNLOCK(mp); 1329 return (error); 1330 1331fail: 1332 if (susp) { 1333 vfs_write_resume(mp); 1334 vn_start_write(NULL, &mp, V_WAIT); 1335 } 1336#ifdef UFS_EXTATTR 1337 if (e_restart) { 1338 ufs_extattr_uepm_init(&ump->um_extattr); 1339#ifdef UFS_EXTATTR_AUTOSTART 1340 (void) ufs_extattr_autostart(mp, td); 1341#endif 1342 } 1343#endif 1344 1345 return (error); 1346} 1347 1348/* 1349 * Flush out all the files in a filesystem. 1350 */ 1351int 1352ffs_flushfiles(mp, flags, td) 1353 struct mount *mp; 1354 int flags; 1355 struct thread *td; 1356{ 1357 struct ufsmount *ump; 1358 int qerror, error; 1359 1360 ump = VFSTOUFS(mp); 1361 qerror = 0; 1362#ifdef QUOTA 1363 if (mp->mnt_flag & MNT_QUOTA) { 1364 int i; 1365 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1366 if (error) 1367 return (error); 1368 for (i = 0; i < MAXQUOTAS; i++) { 1369 error = quotaoff(td, mp, i); 1370 if (error != 0) { 1371 if ((flags & EARLYFLUSH) == 0) 1372 return (error); 1373 else 1374 qerror = error; 1375 } 1376 } 1377 1378 /* 1379 * Here we fall through to vflush again to ensure that 1380 * we have gotten rid of all the system vnodes, unless 1381 * quotas must not be closed. 1382 */ 1383 } 1384#endif 1385 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1386 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1387 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1388 return (error); 1389 ffs_snapshot_unmount(mp); 1390 flags |= FORCECLOSE; 1391 /* 1392 * Here we fall through to vflush again to ensure 1393 * that we have gotten rid of all the system vnodes. 1394 */ 1395 } 1396 1397 /* 1398 * Do not close system files if quotas were not closed, to be 1399 * able to sync the remaining dquots. The freeblks softupdate 1400 * workitems might hold a reference on a dquot, preventing 1401 * quotaoff() from completing. Next round of 1402 * softdep_flushworklist() iteration should process the 1403 * blockers, allowing the next run of quotaoff() to finally 1404 * flush held dquots. 1405 * 1406 * Otherwise, flush all the files. 1407 */ 1408 if (qerror == 0 && (error = vflush(mp, 0, flags, td)) != 0) 1409 return (error); 1410 1411 /* 1412 * Flush filesystem metadata. 1413 */ 1414 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1415 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1416 VOP_UNLOCK(ump->um_devvp, 0); 1417 return (error); 1418} 1419 1420/* 1421 * Get filesystem statistics. 1422 */ 1423static int 1424ffs_statfs(mp, sbp) 1425 struct mount *mp; 1426 struct statfs *sbp; 1427{ 1428 struct ufsmount *ump; 1429 struct fs *fs; 1430 1431 ump = VFSTOUFS(mp); 1432 fs = ump->um_fs; 1433 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1434 panic("ffs_statfs"); 1435 sbp->f_version = STATFS_VERSION; 1436 sbp->f_bsize = fs->fs_fsize; 1437 sbp->f_iosize = fs->fs_bsize; 1438 sbp->f_blocks = fs->fs_dsize; 1439 UFS_LOCK(ump); 1440 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1441 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1442 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1443 dbtofsb(fs, fs->fs_pendingblocks); 1444 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1445 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1446 UFS_UNLOCK(ump); 1447 sbp->f_namemax = NAME_MAX; 1448 return (0); 1449} 1450 1451/* 1452 * For a lazy sync, we only care about access times, quotas and the 1453 * superblock. Other filesystem changes are already converted to 1454 * cylinder group blocks or inode blocks updates and are written to 1455 * disk by syncer. 1456 */ 1457static int 1458ffs_sync_lazy(mp) 1459 struct mount *mp; 1460{ 1461 struct vnode *mvp, *vp; 1462 struct inode *ip; 1463 struct thread *td; 1464 int allerror, error; 1465 1466 allerror = 0; 1467 td = curthread; 1468 if ((mp->mnt_flag & MNT_NOATIME) != 0) 1469 goto qupdate; 1470 MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) { 1471 if (vp->v_type == VNON) { 1472 VI_UNLOCK(vp); 1473 continue; 1474 } 1475 ip = VTOI(vp); 1476 1477 /* 1478 * The IN_ACCESS flag is converted to IN_MODIFIED by 1479 * ufs_close() and ufs_getattr() by the calls to 1480 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1481 * Test also all the other timestamp flags too, to pick up 1482 * any other cases that could be missed. 1483 */ 1484 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1485 IN_UPDATE)) == 0) { 1486 VI_UNLOCK(vp); 1487 continue; 1488 } 1489 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, 1490 td)) != 0) 1491 continue; 1492 error = ffs_update(vp, 0); 1493 if (error != 0) 1494 allerror = error; 1495 vput(vp); 1496 } 1497 1498qupdate: 1499#ifdef QUOTA 1500 qsync(mp); 1501#endif 1502 1503 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1504 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1505 allerror = error; 1506 return (allerror); 1507} 1508 1509/* 1510 * Go through the disk queues to initiate sandbagged IO; 1511 * go through the inodes to write those that have been modified; 1512 * initiate the writing of the super block if it has been modified. 1513 * 1514 * Note: we are always called with the filesystem marked busy using 1515 * vfs_busy(). 1516 */ 1517static int 1518ffs_sync(mp, waitfor) 1519 struct mount *mp; 1520 int waitfor; 1521{ 1522 struct vnode *mvp, *vp, *devvp; 1523 struct thread *td; 1524 struct inode *ip; 1525 struct ufsmount *ump = VFSTOUFS(mp); 1526 struct fs *fs; 1527 int error, count, wait, lockreq, allerror = 0; 1528 int suspend; 1529 int suspended; 1530 int secondary_writes; 1531 int secondary_accwrites; 1532 int softdep_deps; 1533 int softdep_accdeps; 1534 struct bufobj *bo; 1535 1536 wait = 0; 1537 suspend = 0; 1538 suspended = 0; 1539 td = curthread; 1540 fs = ump->um_fs; 1541 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) 1542 panic("%s: ffs_sync: modification on read-only filesystem", 1543 fs->fs_fsmnt); 1544 if (waitfor == MNT_LAZY) 1545 return (ffs_sync_lazy(mp)); 1546 1547 /* 1548 * Write back each (modified) inode. 1549 */ 1550 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1551 if (waitfor == MNT_SUSPEND) { 1552 suspend = 1; 1553 waitfor = MNT_WAIT; 1554 } 1555 if (waitfor == MNT_WAIT) { 1556 wait = 1; 1557 lockreq = LK_EXCLUSIVE; 1558 } 1559 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1560loop: 1561 /* Grab snapshot of secondary write counts */ 1562 MNT_ILOCK(mp); 1563 secondary_writes = mp->mnt_secondary_writes; 1564 secondary_accwrites = mp->mnt_secondary_accwrites; 1565 MNT_IUNLOCK(mp); 1566 1567 /* Grab snapshot of softdep dependency counts */ 1568 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1569 1570 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1571 /* 1572 * Depend on the vnode interlock to keep things stable enough 1573 * for a quick test. Since there might be hundreds of 1574 * thousands of vnodes, we cannot afford even a subroutine 1575 * call unless there's a good chance that we have work to do. 1576 */ 1577 if (vp->v_type == VNON) { 1578 VI_UNLOCK(vp); 1579 continue; 1580 } 1581 ip = VTOI(vp); 1582 if ((ip->i_flag & 1583 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1584 vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1585 VI_UNLOCK(vp); 1586 continue; 1587 } 1588 if ((error = vget(vp, lockreq, td)) != 0) { 1589 if (error == ENOENT || error == ENOLCK) { 1590 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1591 goto loop; 1592 } 1593 continue; 1594 } 1595 if ((error = ffs_syncvnode(vp, waitfor, 0)) != 0) 1596 allerror = error; 1597 vput(vp); 1598 } 1599 /* 1600 * Force stale filesystem control information to be flushed. 1601 */ 1602 if (waitfor == MNT_WAIT) { 1603 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1604 allerror = error; 1605 /* Flushed work items may create new vnodes to clean */ 1606 if (allerror == 0 && count) 1607 goto loop; 1608 } 1609#ifdef QUOTA 1610 qsync(mp); 1611#endif 1612 1613 devvp = ump->um_devvp; 1614 bo = &devvp->v_bufobj; 1615 BO_LOCK(bo); 1616 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1617 BO_UNLOCK(bo); 1618 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1619 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1620 allerror = error; 1621 VOP_UNLOCK(devvp, 0); 1622 if (allerror == 0 && waitfor == MNT_WAIT) 1623 goto loop; 1624 } else if (suspend != 0) { 1625 if (softdep_check_suspend(mp, 1626 devvp, 1627 softdep_deps, 1628 softdep_accdeps, 1629 secondary_writes, 1630 secondary_accwrites) != 0) { 1631 MNT_IUNLOCK(mp); 1632 goto loop; /* More work needed */ 1633 } 1634 mtx_assert(MNT_MTX(mp), MA_OWNED); 1635 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1636 MNT_IUNLOCK(mp); 1637 suspended = 1; 1638 } else 1639 BO_UNLOCK(bo); 1640 /* 1641 * Write back modified superblock. 1642 */ 1643 if (fs->fs_fmod != 0 && 1644 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1645 allerror = error; 1646 return (allerror); 1647} 1648 1649int 1650ffs_vget(mp, ino, flags, vpp) 1651 struct mount *mp; 1652 ino_t ino; 1653 int flags; 1654 struct vnode **vpp; 1655{ 1656 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1657} 1658 1659int 1660ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1661 struct mount *mp; 1662 ino_t ino; 1663 int flags; 1664 struct vnode **vpp; 1665 int ffs_flags; 1666{ 1667 struct fs *fs; 1668 struct inode *ip; 1669 struct ufsmount *ump; 1670 struct buf *bp; 1671 struct vnode *vp; 1672 struct cdev *dev; 1673 int error; 1674 1675 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1676 if (error || *vpp != NULL) 1677 return (error); 1678 1679 /* 1680 * We must promote to an exclusive lock for vnode creation. This 1681 * can happen if lookup is passed LOCKSHARED. 1682 */ 1683 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1684 flags &= ~LK_TYPE_MASK; 1685 flags |= LK_EXCLUSIVE; 1686 } 1687 1688 /* 1689 * We do not lock vnode creation as it is believed to be too 1690 * expensive for such rare case as simultaneous creation of vnode 1691 * for same ino by different processes. We just allow them to race 1692 * and check later to decide who wins. Let the race begin! 1693 */ 1694 1695 ump = VFSTOUFS(mp); 1696 dev = ump->um_dev; 1697 fs = ump->um_fs; 1698 1699 /* 1700 * If this malloc() is performed after the getnewvnode() 1701 * it might block, leaving a vnode with a NULL v_data to be 1702 * found by ffs_sync() if a sync happens to fire right then, 1703 * which will cause a panic because ffs_sync() blindly 1704 * dereferences vp->v_data (as well it should). 1705 */ 1706 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1707 1708 /* Allocate a new vnode/inode. */ 1709 if (fs->fs_magic == FS_UFS1_MAGIC) 1710 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1711 else 1712 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1713 if (error) { 1714 *vpp = NULL; 1715 uma_zfree(uma_inode, ip); 1716 return (error); 1717 } 1718 /* 1719 * FFS supports recursive locking. 1720 */ 1721 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1722 VN_LOCK_AREC(vp); 1723 vp->v_data = ip; 1724 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1725 ip->i_vnode = vp; 1726 ip->i_ump = ump; 1727 ip->i_fs = fs; 1728 ip->i_dev = dev; 1729 ip->i_number = ino; 1730 ip->i_ea_refs = 0; 1731#ifdef QUOTA 1732 { 1733 int i; 1734 for (i = 0; i < MAXQUOTAS; i++) 1735 ip->i_dquot[i] = NODQUOT; 1736 } 1737#endif 1738 1739 if (ffs_flags & FFSV_FORCEINSMQ) 1740 vp->v_vflag |= VV_FORCEINSMQ; 1741 error = insmntque(vp, mp); 1742 if (error != 0) { 1743 uma_zfree(uma_inode, ip); 1744 *vpp = NULL; 1745 return (error); 1746 } 1747 vp->v_vflag &= ~VV_FORCEINSMQ; 1748 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1749 if (error || *vpp != NULL) 1750 return (error); 1751 1752 /* Read in the disk contents for the inode, copy into the inode. */ 1753 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1754 (int)fs->fs_bsize, NOCRED, &bp); 1755 if (error) { 1756 /* 1757 * The inode does not contain anything useful, so it would 1758 * be misleading to leave it on its hash chain. With mode 1759 * still zero, it will be unlinked and returned to the free 1760 * list by vput(). 1761 */ 1762 brelse(bp); 1763 vput(vp); 1764 *vpp = NULL; 1765 return (error); 1766 } 1767 if (ip->i_ump->um_fstype == UFS1) 1768 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1769 else 1770 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1771 ffs_load_inode(bp, ip, fs, ino); 1772 if (DOINGSOFTDEP(vp)) 1773 softdep_load_inodeblock(ip); 1774 else 1775 ip->i_effnlink = ip->i_nlink; 1776 bqrelse(bp); 1777 1778 /* 1779 * Initialize the vnode from the inode, check for aliases. 1780 * Note that the underlying vnode may have changed. 1781 */ 1782 if (ip->i_ump->um_fstype == UFS1) 1783 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1784 else 1785 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1786 if (error) { 1787 vput(vp); 1788 *vpp = NULL; 1789 return (error); 1790 } 1791 1792 /* 1793 * Finish inode initialization. 1794 */ 1795 if (vp->v_type != VFIFO) { 1796 /* FFS supports shared locking for all files except fifos. */ 1797 VN_LOCK_ASHARE(vp); 1798 } 1799 1800 /* 1801 * Set up a generation number for this inode if it does not 1802 * already have one. This should only happen on old filesystems. 1803 */ 1804 if (ip->i_gen == 0) { 1805 ip->i_gen = arc4random() / 2 + 1; 1806 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1807 ip->i_flag |= IN_MODIFIED; 1808 DIP_SET(ip, i_gen, ip->i_gen); 1809 } 1810 } 1811#ifdef MAC 1812 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1813 /* 1814 * If this vnode is already allocated, and we're running 1815 * multi-label, attempt to perform a label association 1816 * from the extended attributes on the inode. 1817 */ 1818 error = mac_vnode_associate_extattr(mp, vp); 1819 if (error) { 1820 /* ufs_inactive will release ip->i_devvp ref. */ 1821 vput(vp); 1822 *vpp = NULL; 1823 return (error); 1824 } 1825 } 1826#endif 1827 1828 *vpp = vp; 1829 return (0); 1830} 1831 1832/* 1833 * File handle to vnode 1834 * 1835 * Have to be really careful about stale file handles: 1836 * - check that the inode number is valid 1837 * - call ffs_vget() to get the locked inode 1838 * - check for an unallocated inode (i_mode == 0) 1839 * - check that the given client host has export rights and return 1840 * those rights via. exflagsp and credanonp 1841 */ 1842static int 1843ffs_fhtovp(mp, fhp, flags, vpp) 1844 struct mount *mp; 1845 struct fid *fhp; 1846 int flags; 1847 struct vnode **vpp; 1848{ 1849 struct ufid *ufhp; 1850 struct fs *fs; 1851 1852 ufhp = (struct ufid *)fhp; 1853 fs = VFSTOUFS(mp)->um_fs; 1854 if (ufhp->ufid_ino < ROOTINO || 1855 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1856 return (ESTALE); 1857 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1858} 1859 1860/* 1861 * Initialize the filesystem. 1862 */ 1863static int 1864ffs_init(vfsp) 1865 struct vfsconf *vfsp; 1866{ 1867 1868 ffs_susp_initialize(); 1869 softdep_initialize(); 1870 return (ufs_init(vfsp)); 1871} 1872 1873/* 1874 * Undo the work of ffs_init(). 1875 */ 1876static int 1877ffs_uninit(vfsp) 1878 struct vfsconf *vfsp; 1879{ 1880 int ret; 1881 1882 ret = ufs_uninit(vfsp); 1883 softdep_uninitialize(); 1884 ffs_susp_uninitialize(); 1885 return (ret); 1886} 1887 1888/* 1889 * Write a superblock and associated information back to disk. 1890 */ 1891int 1892ffs_sbupdate(ump, waitfor, suspended) 1893 struct ufsmount *ump; 1894 int waitfor; 1895 int suspended; 1896{ 1897 struct fs *fs = ump->um_fs; 1898 struct buf *sbbp; 1899 struct buf *bp; 1900 int blks; 1901 void *space; 1902 int i, size, error, allerror = 0; 1903 1904 if (fs->fs_ronly == 1 && 1905 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1906 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1907 panic("ffs_sbupdate: write read-only filesystem"); 1908 /* 1909 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1910 */ 1911 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1912 (int)fs->fs_sbsize, 0, 0, 0); 1913 /* 1914 * First write back the summary information. 1915 */ 1916 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1917 space = fs->fs_csp; 1918 for (i = 0; i < blks; i += fs->fs_frag) { 1919 size = fs->fs_bsize; 1920 if (i + fs->fs_frag > blks) 1921 size = (blks - i) * fs->fs_fsize; 1922 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1923 size, 0, 0, 0); 1924 bcopy(space, bp->b_data, (u_int)size); 1925 space = (char *)space + size; 1926 if (suspended) 1927 bp->b_flags |= B_VALIDSUSPWRT; 1928 if (waitfor != MNT_WAIT) 1929 bawrite(bp); 1930 else if ((error = bwrite(bp)) != 0) 1931 allerror = error; 1932 } 1933 /* 1934 * Now write back the superblock itself. If any errors occurred 1935 * up to this point, then fail so that the superblock avoids 1936 * being written out as clean. 1937 */ 1938 if (allerror) { 1939 brelse(sbbp); 1940 return (allerror); 1941 } 1942 bp = sbbp; 1943 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1944 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1945 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1946 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1947 fs->fs_sblockloc = SBLOCK_UFS1; 1948 } 1949 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1950 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1951 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1952 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1953 fs->fs_sblockloc = SBLOCK_UFS2; 1954 } 1955 fs->fs_fmod = 0; 1956 fs->fs_time = time_second; 1957 if (fs->fs_flags & FS_DOSOFTDEP) 1958 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1959 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1960 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1961 if (suspended) 1962 bp->b_flags |= B_VALIDSUSPWRT; 1963 if (waitfor != MNT_WAIT) 1964 bawrite(bp); 1965 else if ((error = bwrite(bp)) != 0) 1966 allerror = error; 1967 return (allerror); 1968} 1969 1970static int 1971ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1972 int attrnamespace, const char *attrname) 1973{ 1974 1975#ifdef UFS_EXTATTR 1976 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1977 attrname)); 1978#else 1979 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1980 attrname)); 1981#endif 1982} 1983 1984static void 1985ffs_ifree(struct ufsmount *ump, struct inode *ip) 1986{ 1987 1988 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1989 uma_zfree(uma_ufs1, ip->i_din1); 1990 else if (ip->i_din2 != NULL) 1991 uma_zfree(uma_ufs2, ip->i_din2); 1992 uma_zfree(uma_inode, ip); 1993} 1994 1995static int dobkgrdwrite = 1; 1996SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1997 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1998 1999/* 2000 * Complete a background write started from bwrite. 2001 */ 2002static void 2003ffs_backgroundwritedone(struct buf *bp) 2004{ 2005 struct bufobj *bufobj; 2006 struct buf *origbp; 2007 2008 /* 2009 * Find the original buffer that we are writing. 2010 */ 2011 bufobj = bp->b_bufobj; 2012 BO_LOCK(bufobj); 2013 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 2014 panic("backgroundwritedone: lost buffer"); 2015 /* Grab an extra reference to be dropped by the bufdone() below. */ 2016 bufobj_wrefl(bufobj); 2017 BO_UNLOCK(bufobj); 2018 /* 2019 * Process dependencies then return any unfinished ones. 2020 */ 2021 if (!LIST_EMPTY(&bp->b_dep)) 2022 buf_complete(bp); 2023#ifdef SOFTUPDATES 2024 if (!LIST_EMPTY(&bp->b_dep)) 2025 softdep_move_dependencies(bp, origbp); 2026#endif 2027 /* 2028 * This buffer is marked B_NOCACHE so when it is released 2029 * by biodone it will be tossed. 2030 */ 2031 bp->b_flags |= B_NOCACHE; 2032 bp->b_flags &= ~B_CACHE; 2033 bufdone(bp); 2034 BO_LOCK(bufobj); 2035 /* 2036 * Clear the BV_BKGRDINPROG flag in the original buffer 2037 * and awaken it if it is waiting for the write to complete. 2038 * If BV_BKGRDINPROG is not set in the original buffer it must 2039 * have been released and re-instantiated - which is not legal. 2040 */ 2041 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2042 ("backgroundwritedone: lost buffer2")); 2043 origbp->b_vflags &= ~BV_BKGRDINPROG; 2044 if (origbp->b_vflags & BV_BKGRDWAIT) { 2045 origbp->b_vflags &= ~BV_BKGRDWAIT; 2046 wakeup(&origbp->b_xflags); 2047 } 2048 BO_UNLOCK(bufobj); 2049} 2050 2051 2052/* 2053 * Write, release buffer on completion. (Done by iodone 2054 * if async). Do not bother writing anything if the buffer 2055 * is invalid. 2056 * 2057 * Note that we set B_CACHE here, indicating that buffer is 2058 * fully valid and thus cacheable. This is true even of NFS 2059 * now so we set it generally. This could be set either here 2060 * or in biodone() since the I/O is synchronous. We put it 2061 * here. 2062 */ 2063static int 2064ffs_bufwrite(struct buf *bp) 2065{ 2066 int oldflags, s; 2067 struct buf *newbp; 2068 2069 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2070 if (bp->b_flags & B_INVAL) { 2071 brelse(bp); 2072 return (0); 2073 } 2074 2075 oldflags = bp->b_flags; 2076 2077 if (!BUF_ISLOCKED(bp)) 2078 panic("bufwrite: buffer is not busy???"); 2079 s = splbio(); 2080 /* 2081 * If a background write is already in progress, delay 2082 * writing this block if it is asynchronous. Otherwise 2083 * wait for the background write to complete. 2084 */ 2085 BO_LOCK(bp->b_bufobj); 2086 if (bp->b_vflags & BV_BKGRDINPROG) { 2087 if (bp->b_flags & B_ASYNC) { 2088 BO_UNLOCK(bp->b_bufobj); 2089 splx(s); 2090 bdwrite(bp); 2091 return (0); 2092 } 2093 bp->b_vflags |= BV_BKGRDWAIT; 2094 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 2095 if (bp->b_vflags & BV_BKGRDINPROG) 2096 panic("bufwrite: still writing"); 2097 } 2098 BO_UNLOCK(bp->b_bufobj); 2099 2100 /* 2101 * If this buffer is marked for background writing and we 2102 * do not have to wait for it, make a copy and write the 2103 * copy so as to leave this buffer ready for further use. 2104 * 2105 * This optimization eats a lot of memory. If we have a page 2106 * or buffer shortfall we can't do it. 2107 */ 2108 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2109 (bp->b_flags & B_ASYNC) && 2110 !vm_page_count_severe() && 2111 !buf_dirty_count_severe()) { 2112 KASSERT(bp->b_iodone == NULL, 2113 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2114 2115 /* get a new block */ 2116 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2117 if (newbp == NULL) 2118 goto normal_write; 2119 2120 /* 2121 * set it to be identical to the old block. We have to 2122 * set b_lblkno and BKGRDMARKER before calling bgetvp() 2123 * to avoid confusing the splay tree and gbincore(). 2124 */ 2125 KASSERT((bp->b_flags & B_UNMAPPED) == 0, ("Unmapped cg")); 2126 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2127 newbp->b_lblkno = bp->b_lblkno; 2128 newbp->b_xflags |= BX_BKGRDMARKER; 2129 BO_LOCK(bp->b_bufobj); 2130 bp->b_vflags |= BV_BKGRDINPROG; 2131 bgetvp(bp->b_vp, newbp); 2132 BO_UNLOCK(bp->b_bufobj); 2133 newbp->b_bufobj = &bp->b_vp->v_bufobj; 2134 newbp->b_blkno = bp->b_blkno; 2135 newbp->b_offset = bp->b_offset; 2136 newbp->b_iodone = ffs_backgroundwritedone; 2137 newbp->b_flags |= B_ASYNC; 2138 newbp->b_flags &= ~B_INVAL; 2139 2140#ifdef SOFTUPDATES 2141 /* 2142 * Move over the dependencies. If there are rollbacks, 2143 * leave the parent buffer dirtied as it will need to 2144 * be written again. 2145 */ 2146 if (LIST_EMPTY(&bp->b_dep) || 2147 softdep_move_dependencies(bp, newbp) == 0) 2148 bundirty(bp); 2149#else 2150 bundirty(bp); 2151#endif 2152 2153 /* 2154 * Initiate write on the copy, release the original to 2155 * the B_LOCKED queue so that it cannot go away until 2156 * the background write completes. If not locked it could go 2157 * away and then be reconstituted while it was being written. 2158 * If the reconstituted buffer were written, we could end up 2159 * with two background copies being written at the same time. 2160 */ 2161 bqrelse(bp); 2162 bp = newbp; 2163 } else 2164 /* Mark the buffer clean */ 2165 bundirty(bp); 2166 2167 2168 /* Let the normal bufwrite do the rest for us */ 2169normal_write: 2170 return (bufwrite(bp)); 2171} 2172 2173 2174static void 2175ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2176{ 2177 struct vnode *vp; 2178 int error; 2179 struct buf *tbp; 2180 int nocopy; 2181 2182 vp = bo->__bo_vnode; 2183 if (bp->b_iocmd == BIO_WRITE) { 2184 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2185 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2186 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2187 panic("ffs_geom_strategy: bad I/O"); 2188 nocopy = bp->b_flags & B_NOCOPY; 2189 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2190 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2191 vp->v_rdev->si_snapdata != NULL) { 2192 if ((bp->b_flags & B_CLUSTER) != 0) { 2193 runningbufwakeup(bp); 2194 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2195 b_cluster.cluster_entry) { 2196 error = ffs_copyonwrite(vp, tbp); 2197 if (error != 0 && 2198 error != EOPNOTSUPP) { 2199 bp->b_error = error; 2200 bp->b_ioflags |= BIO_ERROR; 2201 bufdone(bp); 2202 return; 2203 } 2204 } 2205 bp->b_runningbufspace = bp->b_bufsize; 2206 atomic_add_long(&runningbufspace, 2207 bp->b_runningbufspace); 2208 } else { 2209 error = ffs_copyonwrite(vp, bp); 2210 if (error != 0 && error != EOPNOTSUPP) { 2211 bp->b_error = error; 2212 bp->b_ioflags |= BIO_ERROR; 2213 bufdone(bp); 2214 return; 2215 } 2216 } 2217 } 2218#ifdef SOFTUPDATES 2219 if ((bp->b_flags & B_CLUSTER) != 0) { 2220 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2221 b_cluster.cluster_entry) { 2222 if (!LIST_EMPTY(&tbp->b_dep)) 2223 buf_start(tbp); 2224 } 2225 } else { 2226 if (!LIST_EMPTY(&bp->b_dep)) 2227 buf_start(bp); 2228 } 2229 2230#endif 2231 } 2232 g_vfs_strategy(bo, bp); 2233} 2234 2235int 2236ffs_own_mount(const struct mount *mp) 2237{ 2238 2239 if (mp->mnt_op == &ufs_vfsops) 2240 return (1); 2241 return (0); 2242} 2243 2244#ifdef DDB 2245 2246static void 2247db_print_ffs(struct ufsmount *ump) 2248{ 2249 db_printf("mp %p %s devvp %p fs %p su_wl %d su_deps %d su_req %d\n", 2250 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 2251 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 2252 ump->softdep_deps, ump->softdep_req); 2253} 2254 2255DB_SHOW_COMMAND(ffs, db_show_ffs) 2256{ 2257 struct mount *mp; 2258 struct ufsmount *ump; 2259 2260 if (have_addr) { 2261 ump = VFSTOUFS((struct mount *)addr); 2262 db_print_ffs(ump); 2263 return; 2264 } 2265 2266 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2267 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2268 db_print_ffs(VFSTOUFS(mp)); 2269 } 2270} 2271 2272#endif /* DDB */ 2273