ffs_vfsops.c revision 297787
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: stable/10/sys/ufs/ffs/ffs_vfsops.c 297787 2016-04-10 16:32:21Z kib $"); 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/taskqueue.h> 46#include <sys/kernel.h> 47#include <sys/vnode.h> 48#include <sys/mount.h> 49#include <sys/bio.h> 50#include <sys/buf.h> 51#include <sys/conf.h> 52#include <sys/fcntl.h> 53#include <sys/ioccom.h> 54#include <sys/malloc.h> 55#include <sys/mutex.h> 56#include <sys/rwlock.h> 57 58#include <security/mac/mac_framework.h> 59 60#include <ufs/ufs/extattr.h> 61#include <ufs/ufs/gjournal.h> 62#include <ufs/ufs/quota.h> 63#include <ufs/ufs/ufsmount.h> 64#include <ufs/ufs/inode.h> 65#include <ufs/ufs/ufs_extern.h> 66 67#include <ufs/ffs/fs.h> 68#include <ufs/ffs/ffs_extern.h> 69 70#include <vm/vm.h> 71#include <vm/uma.h> 72#include <vm/vm_page.h> 73 74#include <geom/geom.h> 75#include <geom/geom_vfs.h> 76 77#include <ddb/ddb.h> 78 79static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 80 81static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 82static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 83 ufs2_daddr_t); 84static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 85static int ffs_sync_lazy(struct mount *mp); 86 87static vfs_init_t ffs_init; 88static vfs_uninit_t ffs_uninit; 89static vfs_extattrctl_t ffs_extattrctl; 90static vfs_cmount_t ffs_cmount; 91static vfs_unmount_t ffs_unmount; 92static vfs_mount_t ffs_mount; 93static vfs_statfs_t ffs_statfs; 94static vfs_fhtovp_t ffs_fhtovp; 95static vfs_sync_t ffs_sync; 96 97static struct vfsops ufs_vfsops = { 98 .vfs_extattrctl = ffs_extattrctl, 99 .vfs_fhtovp = ffs_fhtovp, 100 .vfs_init = ffs_init, 101 .vfs_mount = ffs_mount, 102 .vfs_cmount = ffs_cmount, 103 .vfs_quotactl = ufs_quotactl, 104 .vfs_root = ufs_root, 105 .vfs_statfs = ffs_statfs, 106 .vfs_sync = ffs_sync, 107 .vfs_uninit = ffs_uninit, 108 .vfs_unmount = ffs_unmount, 109 .vfs_vget = ffs_vget, 110 .vfs_susp_clean = process_deferred_inactive, 111}; 112 113VFS_SET(ufs_vfsops, ufs, 0); 114MODULE_VERSION(ufs, 1); 115 116static b_strategy_t ffs_geom_strategy; 117static b_write_t ffs_bufwrite; 118 119static struct buf_ops ffs_ops = { 120 .bop_name = "FFS", 121 .bop_write = ffs_bufwrite, 122 .bop_strategy = ffs_geom_strategy, 123 .bop_sync = bufsync, 124#ifdef NO_FFS_SNAPSHOT 125 .bop_bdflush = bufbdflush, 126#else 127 .bop_bdflush = ffs_bdflush, 128#endif 129}; 130 131/* 132 * Note that userquota and groupquota options are not currently used 133 * by UFS/FFS code and generally mount(8) does not pass those options 134 * from userland, but they can be passed by loader(8) via 135 * vfs.root.mountfrom.options. 136 */ 137static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 138 "noclusterw", "noexec", "export", "force", "from", "groupquota", 139 "multilabel", "nfsv4acls", "fsckpid", "snapshot", "nosuid", "suiddir", 140 "nosymfollow", "sync", "union", "userquota", NULL }; 141 142static int 143ffs_mount(struct mount *mp) 144{ 145 struct vnode *devvp; 146 struct thread *td; 147 struct ufsmount *ump = NULL; 148 struct fs *fs; 149 pid_t fsckpid = 0; 150 int error, flags; 151 uint64_t mntorflags; 152 accmode_t accmode; 153 struct nameidata ndp; 154 char *fspec; 155 156 td = curthread; 157 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 158 return (EINVAL); 159 if (uma_inode == NULL) { 160 uma_inode = uma_zcreate("FFS inode", 161 sizeof(struct inode), NULL, NULL, NULL, NULL, 162 UMA_ALIGN_PTR, 0); 163 uma_ufs1 = uma_zcreate("FFS1 dinode", 164 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 165 UMA_ALIGN_PTR, 0); 166 uma_ufs2 = uma_zcreate("FFS2 dinode", 167 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 168 UMA_ALIGN_PTR, 0); 169 } 170 171 vfs_deleteopt(mp->mnt_optnew, "groupquota"); 172 vfs_deleteopt(mp->mnt_optnew, "userquota"); 173 174 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 175 if (error) 176 return (error); 177 178 mntorflags = 0; 179 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 180 mntorflags |= MNT_ACLS; 181 182 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 183 mntorflags |= MNT_SNAPSHOT; 184 /* 185 * Once we have set the MNT_SNAPSHOT flag, do not 186 * persist "snapshot" in the options list. 187 */ 188 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 189 vfs_deleteopt(mp->mnt_opt, "snapshot"); 190 } 191 192 if (vfs_getopt(mp->mnt_optnew, "fsckpid", NULL, NULL) == 0 && 193 vfs_scanopt(mp->mnt_optnew, "fsckpid", "%d", &fsckpid) == 1) { 194 /* 195 * Once we have set the restricted PID, do not 196 * persist "fsckpid" in the options list. 197 */ 198 vfs_deleteopt(mp->mnt_optnew, "fsckpid"); 199 vfs_deleteopt(mp->mnt_opt, "fsckpid"); 200 if (mp->mnt_flag & MNT_UPDATE) { 201 if (VFSTOUFS(mp)->um_fs->fs_ronly == 0 && 202 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 203 vfs_mount_error(mp, 204 "Checker enable: Must be read-only"); 205 return (EINVAL); 206 } 207 } else if (vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 208 vfs_mount_error(mp, 209 "Checker enable: Must be read-only"); 210 return (EINVAL); 211 } 212 /* Set to -1 if we are done */ 213 if (fsckpid == 0) 214 fsckpid = -1; 215 } 216 217 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { 218 if (mntorflags & MNT_ACLS) { 219 vfs_mount_error(mp, 220 "\"acls\" and \"nfsv4acls\" options " 221 "are mutually exclusive"); 222 return (EINVAL); 223 } 224 mntorflags |= MNT_NFS4ACLS; 225 } 226 227 MNT_ILOCK(mp); 228 mp->mnt_flag |= mntorflags; 229 MNT_IUNLOCK(mp); 230 /* 231 * If updating, check whether changing from read-only to 232 * read/write; if there is no device name, that's all we do. 233 */ 234 if (mp->mnt_flag & MNT_UPDATE) { 235 ump = VFSTOUFS(mp); 236 fs = ump->um_fs; 237 devvp = ump->um_devvp; 238 if (fsckpid == -1 && ump->um_fsckpid > 0) { 239 if ((error = ffs_flushfiles(mp, WRITECLOSE, td)) != 0 || 240 (error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) 241 return (error); 242 DROP_GIANT(); 243 g_topology_lock(); 244 /* 245 * Return to normal read-only mode. 246 */ 247 error = g_access(ump->um_cp, 0, -1, 0); 248 g_topology_unlock(); 249 PICKUP_GIANT(); 250 ump->um_fsckpid = 0; 251 } 252 if (fs->fs_ronly == 0 && 253 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 254 /* 255 * Flush any dirty data and suspend filesystem. 256 */ 257 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 258 return (error); 259 error = vfs_write_suspend_umnt(mp); 260 if (error != 0) 261 return (error); 262 /* 263 * Check for and optionally get rid of files open 264 * for writing. 265 */ 266 flags = WRITECLOSE; 267 if (mp->mnt_flag & MNT_FORCE) 268 flags |= FORCECLOSE; 269 if (MOUNTEDSOFTDEP(mp)) { 270 error = softdep_flushfiles(mp, flags, td); 271 } else { 272 error = ffs_flushfiles(mp, flags, td); 273 } 274 if (error) { 275 vfs_write_resume(mp, 0); 276 return (error); 277 } 278 if (fs->fs_pendingblocks != 0 || 279 fs->fs_pendinginodes != 0) { 280 printf("WARNING: %s Update error: blocks %jd " 281 "files %d\n", fs->fs_fsmnt, 282 (intmax_t)fs->fs_pendingblocks, 283 fs->fs_pendinginodes); 284 fs->fs_pendingblocks = 0; 285 fs->fs_pendinginodes = 0; 286 } 287 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 288 fs->fs_clean = 1; 289 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 290 fs->fs_ronly = 0; 291 fs->fs_clean = 0; 292 vfs_write_resume(mp, 0); 293 return (error); 294 } 295 if (MOUNTEDSOFTDEP(mp)) 296 softdep_unmount(mp); 297 DROP_GIANT(); 298 g_topology_lock(); 299 /* 300 * Drop our write and exclusive access. 301 */ 302 g_access(ump->um_cp, 0, -1, -1); 303 g_topology_unlock(); 304 PICKUP_GIANT(); 305 fs->fs_ronly = 1; 306 MNT_ILOCK(mp); 307 mp->mnt_flag |= MNT_RDONLY; 308 MNT_IUNLOCK(mp); 309 /* 310 * Allow the writers to note that filesystem 311 * is ro now. 312 */ 313 vfs_write_resume(mp, 0); 314 } 315 if ((mp->mnt_flag & MNT_RELOAD) && 316 (error = ffs_reload(mp, td, 0)) != 0) 317 return (error); 318 if (fs->fs_ronly && 319 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 320 /* 321 * If we are running a checker, do not allow upgrade. 322 */ 323 if (ump->um_fsckpid > 0) { 324 vfs_mount_error(mp, 325 "Active checker, cannot upgrade to write"); 326 return (EINVAL); 327 } 328 /* 329 * If upgrade to read-write by non-root, then verify 330 * that user has necessary permissions on the device. 331 */ 332 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 333 error = VOP_ACCESS(devvp, VREAD | VWRITE, 334 td->td_ucred, td); 335 if (error) 336 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 337 if (error) { 338 VOP_UNLOCK(devvp, 0); 339 return (error); 340 } 341 VOP_UNLOCK(devvp, 0); 342 fs->fs_flags &= ~FS_UNCLEAN; 343 if (fs->fs_clean == 0) { 344 fs->fs_flags |= FS_UNCLEAN; 345 if ((mp->mnt_flag & MNT_FORCE) || 346 ((fs->fs_flags & 347 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 348 (fs->fs_flags & FS_DOSOFTDEP))) { 349 printf("WARNING: %s was not properly " 350 "dismounted\n", fs->fs_fsmnt); 351 } else { 352 vfs_mount_error(mp, 353 "R/W mount of %s denied. %s.%s", 354 fs->fs_fsmnt, 355 "Filesystem is not clean - run fsck", 356 (fs->fs_flags & FS_SUJ) == 0 ? "" : 357 " Forced mount will invalidate" 358 " journal contents"); 359 return (EPERM); 360 } 361 } 362 DROP_GIANT(); 363 g_topology_lock(); 364 /* 365 * Request exclusive write access. 366 */ 367 error = g_access(ump->um_cp, 0, 1, 1); 368 g_topology_unlock(); 369 PICKUP_GIANT(); 370 if (error) 371 return (error); 372 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 373 return (error); 374 fs->fs_ronly = 0; 375 MNT_ILOCK(mp); 376 mp->mnt_flag &= ~MNT_RDONLY; 377 MNT_IUNLOCK(mp); 378 fs->fs_mtime = time_second; 379 /* check to see if we need to start softdep */ 380 if ((fs->fs_flags & FS_DOSOFTDEP) && 381 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 382 vn_finished_write(mp); 383 return (error); 384 } 385 fs->fs_clean = 0; 386 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 387 vn_finished_write(mp); 388 return (error); 389 } 390 if (fs->fs_snapinum[0] != 0) 391 ffs_snapshot_mount(mp); 392 vn_finished_write(mp); 393 } 394 /* 395 * Soft updates is incompatible with "async", 396 * so if we are doing softupdates stop the user 397 * from setting the async flag in an update. 398 * Softdep_mount() clears it in an initial mount 399 * or ro->rw remount. 400 */ 401 if (MOUNTEDSOFTDEP(mp)) { 402 /* XXX: Reset too late ? */ 403 MNT_ILOCK(mp); 404 mp->mnt_flag &= ~MNT_ASYNC; 405 MNT_IUNLOCK(mp); 406 } 407 /* 408 * Keep MNT_ACLS flag if it is stored in superblock. 409 */ 410 if ((fs->fs_flags & FS_ACLS) != 0) { 411 /* XXX: Set too late ? */ 412 MNT_ILOCK(mp); 413 mp->mnt_flag |= MNT_ACLS; 414 MNT_IUNLOCK(mp); 415 } 416 417 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 418 /* XXX: Set too late ? */ 419 MNT_ILOCK(mp); 420 mp->mnt_flag |= MNT_NFS4ACLS; 421 MNT_IUNLOCK(mp); 422 } 423 /* 424 * If this is a request from fsck to clean up the filesystem, 425 * then allow the specified pid to proceed. 426 */ 427 if (fsckpid > 0) { 428 if (ump->um_fsckpid != 0) { 429 vfs_mount_error(mp, 430 "Active checker already running on %s", 431 fs->fs_fsmnt); 432 return (EINVAL); 433 } 434 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 435 ("soft updates enabled on read-only file system")); 436 DROP_GIANT(); 437 g_topology_lock(); 438 /* 439 * Request write access. 440 */ 441 error = g_access(ump->um_cp, 0, 1, 0); 442 g_topology_unlock(); 443 PICKUP_GIANT(); 444 if (error) { 445 vfs_mount_error(mp, 446 "Checker activation failed on %s", 447 fs->fs_fsmnt); 448 return (error); 449 } 450 ump->um_fsckpid = fsckpid; 451 if (fs->fs_snapinum[0] != 0) 452 ffs_snapshot_mount(mp); 453 fs->fs_mtime = time_second; 454 fs->fs_fmod = 1; 455 fs->fs_clean = 0; 456 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 457 } 458 459 /* 460 * If this is a snapshot request, take the snapshot. 461 */ 462 if (mp->mnt_flag & MNT_SNAPSHOT) 463 return (ffs_snapshot(mp, fspec)); 464 } 465 466 /* 467 * Not an update, or updating the name: look up the name 468 * and verify that it refers to a sensible disk device. 469 */ 470 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 471 if ((error = namei(&ndp)) != 0) 472 return (error); 473 NDFREE(&ndp, NDF_ONLY_PNBUF); 474 devvp = ndp.ni_vp; 475 if (!vn_isdisk(devvp, &error)) { 476 vput(devvp); 477 return (error); 478 } 479 480 /* 481 * If mount by non-root, then verify that user has necessary 482 * permissions on the device. 483 */ 484 accmode = VREAD; 485 if ((mp->mnt_flag & MNT_RDONLY) == 0) 486 accmode |= VWRITE; 487 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 488 if (error) 489 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 490 if (error) { 491 vput(devvp); 492 return (error); 493 } 494 495 if (mp->mnt_flag & MNT_UPDATE) { 496 /* 497 * Update only 498 * 499 * If it's not the same vnode, or at least the same device 500 * then it's not correct. 501 */ 502 503 if (devvp->v_rdev != ump->um_devvp->v_rdev) 504 error = EINVAL; /* needs translation */ 505 vput(devvp); 506 if (error) 507 return (error); 508 } else { 509 /* 510 * New mount 511 * 512 * We need the name for the mount point (also used for 513 * "last mounted on") copied in. If an error occurs, 514 * the mount point is discarded by the upper level code. 515 * Note that vfs_mount() populates f_mntonname for us. 516 */ 517 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 518 vrele(devvp); 519 return (error); 520 } 521 if (fsckpid > 0) { 522 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 523 ("soft updates enabled on read-only file system")); 524 ump = VFSTOUFS(mp); 525 fs = ump->um_fs; 526 DROP_GIANT(); 527 g_topology_lock(); 528 /* 529 * Request write access. 530 */ 531 error = g_access(ump->um_cp, 0, 1, 0); 532 g_topology_unlock(); 533 PICKUP_GIANT(); 534 if (error) { 535 printf("WARNING: %s: Checker activation " 536 "failed\n", fs->fs_fsmnt); 537 } else { 538 ump->um_fsckpid = fsckpid; 539 if (fs->fs_snapinum[0] != 0) 540 ffs_snapshot_mount(mp); 541 fs->fs_mtime = time_second; 542 fs->fs_clean = 0; 543 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 544 } 545 } 546 } 547 vfs_mountedfrom(mp, fspec); 548 return (0); 549} 550 551/* 552 * Compatibility with old mount system call. 553 */ 554 555static int 556ffs_cmount(struct mntarg *ma, void *data, uint64_t flags) 557{ 558 struct ufs_args args; 559 struct export_args exp; 560 int error; 561 562 if (data == NULL) 563 return (EINVAL); 564 error = copyin(data, &args, sizeof args); 565 if (error) 566 return (error); 567 vfs_oexport_conv(&args.export, &exp); 568 569 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 570 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 571 error = kernel_mount(ma, flags); 572 573 return (error); 574} 575 576/* 577 * Reload all incore data for a filesystem (used after running fsck on 578 * the root filesystem and finding things to fix). If the 'force' flag 579 * is 0, the filesystem must be mounted read-only. 580 * 581 * Things to do to update the mount: 582 * 1) invalidate all cached meta-data. 583 * 2) re-read superblock from disk. 584 * 3) re-read summary information from disk. 585 * 4) invalidate all inactive vnodes. 586 * 5) invalidate all cached file data. 587 * 6) re-read inode data for all active vnodes. 588 */ 589int 590ffs_reload(struct mount *mp, struct thread *td, int force) 591{ 592 struct vnode *vp, *mvp, *devvp; 593 struct inode *ip; 594 void *space; 595 struct buf *bp; 596 struct fs *fs, *newfs; 597 struct ufsmount *ump; 598 ufs2_daddr_t sblockloc; 599 int i, blks, size, error; 600 int32_t *lp; 601 602 ump = VFSTOUFS(mp); 603 604 MNT_ILOCK(mp); 605 if ((mp->mnt_flag & MNT_RDONLY) == 0 && force == 0) { 606 MNT_IUNLOCK(mp); 607 return (EINVAL); 608 } 609 MNT_IUNLOCK(mp); 610 611 /* 612 * Step 1: invalidate all cached meta-data. 613 */ 614 devvp = VFSTOUFS(mp)->um_devvp; 615 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 616 if (vinvalbuf(devvp, 0, 0, 0) != 0) 617 panic("ffs_reload: dirty1"); 618 VOP_UNLOCK(devvp, 0); 619 620 /* 621 * Step 2: re-read superblock from disk. 622 */ 623 fs = VFSTOUFS(mp)->um_fs; 624 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 625 NOCRED, &bp)) != 0) 626 return (error); 627 newfs = (struct fs *)bp->b_data; 628 if ((newfs->fs_magic != FS_UFS1_MAGIC && 629 newfs->fs_magic != FS_UFS2_MAGIC) || 630 newfs->fs_bsize > MAXBSIZE || 631 newfs->fs_bsize < sizeof(struct fs)) { 632 brelse(bp); 633 return (EIO); /* XXX needs translation */ 634 } 635 /* 636 * Copy pointer fields back into superblock before copying in XXX 637 * new superblock. These should really be in the ufsmount. XXX 638 * Note that important parameters (eg fs_ncg) are unchanged. 639 */ 640 newfs->fs_csp = fs->fs_csp; 641 newfs->fs_maxcluster = fs->fs_maxcluster; 642 newfs->fs_contigdirs = fs->fs_contigdirs; 643 newfs->fs_active = fs->fs_active; 644 newfs->fs_ronly = fs->fs_ronly; 645 sblockloc = fs->fs_sblockloc; 646 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 647 brelse(bp); 648 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 649 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 650 UFS_LOCK(ump); 651 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 652 printf("WARNING: %s: reload pending error: blocks %jd " 653 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 654 fs->fs_pendinginodes); 655 fs->fs_pendingblocks = 0; 656 fs->fs_pendinginodes = 0; 657 } 658 UFS_UNLOCK(ump); 659 660 /* 661 * Step 3: re-read summary information from disk. 662 */ 663 size = fs->fs_cssize; 664 blks = howmany(size, fs->fs_fsize); 665 if (fs->fs_contigsumsize > 0) 666 size += fs->fs_ncg * sizeof(int32_t); 667 size += fs->fs_ncg * sizeof(u_int8_t); 668 free(fs->fs_csp, M_UFSMNT); 669 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 670 fs->fs_csp = space; 671 for (i = 0; i < blks; i += fs->fs_frag) { 672 size = fs->fs_bsize; 673 if (i + fs->fs_frag > blks) 674 size = (blks - i) * fs->fs_fsize; 675 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 676 NOCRED, &bp); 677 if (error) 678 return (error); 679 bcopy(bp->b_data, space, (u_int)size); 680 space = (char *)space + size; 681 brelse(bp); 682 } 683 /* 684 * We no longer know anything about clusters per cylinder group. 685 */ 686 if (fs->fs_contigsumsize > 0) { 687 fs->fs_maxcluster = lp = space; 688 for (i = 0; i < fs->fs_ncg; i++) 689 *lp++ = fs->fs_contigsumsize; 690 space = lp; 691 } 692 size = fs->fs_ncg * sizeof(u_int8_t); 693 fs->fs_contigdirs = (u_int8_t *)space; 694 bzero(fs->fs_contigdirs, size); 695 696loop: 697 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 698 /* 699 * Skip syncer vnode. 700 */ 701 if (vp->v_type == VNON) { 702 VI_UNLOCK(vp); 703 continue; 704 } 705 /* 706 * Step 4: invalidate all cached file data. 707 */ 708 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 709 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 710 goto loop; 711 } 712 if (vinvalbuf(vp, 0, 0, 0)) 713 panic("ffs_reload: dirty2"); 714 /* 715 * Step 5: re-read inode data for all active vnodes. 716 */ 717 ip = VTOI(vp); 718 error = 719 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 720 (int)fs->fs_bsize, NOCRED, &bp); 721 if (error) { 722 VOP_UNLOCK(vp, 0); 723 vrele(vp); 724 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 725 return (error); 726 } 727 ffs_load_inode(bp, ip, fs, ip->i_number); 728 ip->i_effnlink = ip->i_nlink; 729 brelse(bp); 730 VOP_UNLOCK(vp, 0); 731 vrele(vp); 732 } 733 return (0); 734} 735 736/* 737 * Possible superblock locations ordered from most to least likely. 738 */ 739static int sblock_try[] = SBLOCKSEARCH; 740 741/* 742 * Common code for mount and mountroot 743 */ 744static int 745ffs_mountfs(devvp, mp, td) 746 struct vnode *devvp; 747 struct mount *mp; 748 struct thread *td; 749{ 750 struct ufsmount *ump; 751 struct buf *bp; 752 struct fs *fs; 753 struct cdev *dev; 754 void *space; 755 ufs2_daddr_t sblockloc; 756 int error, i, blks, size, ronly; 757 int32_t *lp; 758 struct ucred *cred; 759 struct g_consumer *cp; 760 struct mount *nmp; 761 762 bp = NULL; 763 ump = NULL; 764 cred = td ? td->td_ucred : NOCRED; 765 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 766 767 dev = devvp->v_rdev; 768 dev_ref(dev); 769 DROP_GIANT(); 770 g_topology_lock(); 771 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 772 g_topology_unlock(); 773 PICKUP_GIANT(); 774 VOP_UNLOCK(devvp, 0); 775 if (error) 776 goto out; 777 if (devvp->v_rdev->si_iosize_max != 0) 778 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 779 if (mp->mnt_iosize_max > MAXPHYS) 780 mp->mnt_iosize_max = MAXPHYS; 781 782 devvp->v_bufobj.bo_ops = &ffs_ops; 783 784 fs = NULL; 785 sblockloc = 0; 786 /* 787 * Try reading the superblock in each of its possible locations. 788 */ 789 for (i = 0; sblock_try[i] != -1; i++) { 790 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 791 error = EINVAL; 792 vfs_mount_error(mp, 793 "Invalid sectorsize %d for superblock size %d", 794 cp->provider->sectorsize, SBLOCKSIZE); 795 goto out; 796 } 797 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 798 cred, &bp)) != 0) 799 goto out; 800 fs = (struct fs *)bp->b_data; 801 sblockloc = sblock_try[i]; 802 if ((fs->fs_magic == FS_UFS1_MAGIC || 803 (fs->fs_magic == FS_UFS2_MAGIC && 804 (fs->fs_sblockloc == sblockloc || 805 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 806 fs->fs_bsize <= MAXBSIZE && 807 fs->fs_bsize >= sizeof(struct fs)) 808 break; 809 brelse(bp); 810 bp = NULL; 811 } 812 if (sblock_try[i] == -1) { 813 error = EINVAL; /* XXX needs translation */ 814 goto out; 815 } 816 fs->fs_fmod = 0; 817 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 818 fs->fs_flags &= ~FS_UNCLEAN; 819 if (fs->fs_clean == 0) { 820 fs->fs_flags |= FS_UNCLEAN; 821 if (ronly || (mp->mnt_flag & MNT_FORCE) || 822 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 823 (fs->fs_flags & FS_DOSOFTDEP))) { 824 printf("WARNING: %s was not properly dismounted\n", 825 fs->fs_fsmnt); 826 } else { 827 vfs_mount_error(mp, "R/W mount of %s denied. %s%s", 828 fs->fs_fsmnt, "Filesystem is not clean - run fsck.", 829 (fs->fs_flags & FS_SUJ) == 0 ? "" : 830 " Forced mount will invalidate journal contents"); 831 error = EPERM; 832 goto out; 833 } 834 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 835 (mp->mnt_flag & MNT_FORCE)) { 836 printf("WARNING: %s: lost blocks %jd files %d\n", 837 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 838 fs->fs_pendinginodes); 839 fs->fs_pendingblocks = 0; 840 fs->fs_pendinginodes = 0; 841 } 842 } 843 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 844 printf("WARNING: %s: mount pending error: blocks %jd " 845 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 846 fs->fs_pendinginodes); 847 fs->fs_pendingblocks = 0; 848 fs->fs_pendinginodes = 0; 849 } 850 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 851#ifdef UFS_GJOURNAL 852 /* 853 * Get journal provider name. 854 */ 855 size = 1024; 856 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 857 if (g_io_getattr("GJOURNAL::provider", cp, &size, 858 mp->mnt_gjprovider) == 0) { 859 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 860 M_UFSMNT, M_WAITOK); 861 MNT_ILOCK(mp); 862 mp->mnt_flag |= MNT_GJOURNAL; 863 MNT_IUNLOCK(mp); 864 } else { 865 printf("WARNING: %s: GJOURNAL flag on fs " 866 "but no gjournal provider below\n", 867 mp->mnt_stat.f_mntonname); 868 free(mp->mnt_gjprovider, M_UFSMNT); 869 mp->mnt_gjprovider = NULL; 870 } 871#else 872 printf("WARNING: %s: GJOURNAL flag on fs but no " 873 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 874#endif 875 } else { 876 mp->mnt_gjprovider = NULL; 877 } 878 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 879 ump->um_cp = cp; 880 ump->um_bo = &devvp->v_bufobj; 881 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 882 if (fs->fs_magic == FS_UFS1_MAGIC) { 883 ump->um_fstype = UFS1; 884 ump->um_balloc = ffs_balloc_ufs1; 885 } else { 886 ump->um_fstype = UFS2; 887 ump->um_balloc = ffs_balloc_ufs2; 888 } 889 ump->um_blkatoff = ffs_blkatoff; 890 ump->um_truncate = ffs_truncate; 891 ump->um_update = ffs_update; 892 ump->um_valloc = ffs_valloc; 893 ump->um_vfree = ffs_vfree; 894 ump->um_ifree = ffs_ifree; 895 ump->um_rdonly = ffs_rdonly; 896 ump->um_snapgone = ffs_snapgone; 897 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 898 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 899 if (fs->fs_sbsize < SBLOCKSIZE) 900 bp->b_flags |= B_INVAL | B_NOCACHE; 901 brelse(bp); 902 bp = NULL; 903 fs = ump->um_fs; 904 ffs_oldfscompat_read(fs, ump, sblockloc); 905 fs->fs_ronly = ronly; 906 size = fs->fs_cssize; 907 blks = howmany(size, fs->fs_fsize); 908 if (fs->fs_contigsumsize > 0) 909 size += fs->fs_ncg * sizeof(int32_t); 910 size += fs->fs_ncg * sizeof(u_int8_t); 911 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 912 fs->fs_csp = space; 913 for (i = 0; i < blks; i += fs->fs_frag) { 914 size = fs->fs_bsize; 915 if (i + fs->fs_frag > blks) 916 size = (blks - i) * fs->fs_fsize; 917 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 918 cred, &bp)) != 0) { 919 free(fs->fs_csp, M_UFSMNT); 920 goto out; 921 } 922 bcopy(bp->b_data, space, (u_int)size); 923 space = (char *)space + size; 924 brelse(bp); 925 bp = NULL; 926 } 927 if (fs->fs_contigsumsize > 0) { 928 fs->fs_maxcluster = lp = space; 929 for (i = 0; i < fs->fs_ncg; i++) 930 *lp++ = fs->fs_contigsumsize; 931 space = lp; 932 } 933 size = fs->fs_ncg * sizeof(u_int8_t); 934 fs->fs_contigdirs = (u_int8_t *)space; 935 bzero(fs->fs_contigdirs, size); 936 fs->fs_active = NULL; 937 mp->mnt_data = ump; 938 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 939 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 940 nmp = NULL; 941 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 942 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 943 if (nmp) 944 vfs_rel(nmp); 945 vfs_getnewfsid(mp); 946 } 947 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 948 MNT_ILOCK(mp); 949 mp->mnt_flag |= MNT_LOCAL; 950 MNT_IUNLOCK(mp); 951 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 952#ifdef MAC 953 MNT_ILOCK(mp); 954 mp->mnt_flag |= MNT_MULTILABEL; 955 MNT_IUNLOCK(mp); 956#else 957 printf("WARNING: %s: multilabel flag on fs but " 958 "no MAC support\n", mp->mnt_stat.f_mntonname); 959#endif 960 } 961 if ((fs->fs_flags & FS_ACLS) != 0) { 962#ifdef UFS_ACL 963 MNT_ILOCK(mp); 964 965 if (mp->mnt_flag & MNT_NFS4ACLS) 966 printf("WARNING: %s: ACLs flag on fs conflicts with " 967 "\"nfsv4acls\" mount option; option ignored\n", 968 mp->mnt_stat.f_mntonname); 969 mp->mnt_flag &= ~MNT_NFS4ACLS; 970 mp->mnt_flag |= MNT_ACLS; 971 972 MNT_IUNLOCK(mp); 973#else 974 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 975 mp->mnt_stat.f_mntonname); 976#endif 977 } 978 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 979#ifdef UFS_ACL 980 MNT_ILOCK(mp); 981 982 if (mp->mnt_flag & MNT_ACLS) 983 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 984 "with \"acls\" mount option; option ignored\n", 985 mp->mnt_stat.f_mntonname); 986 mp->mnt_flag &= ~MNT_ACLS; 987 mp->mnt_flag |= MNT_NFS4ACLS; 988 989 MNT_IUNLOCK(mp); 990#else 991 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 992 "ACLs support\n", mp->mnt_stat.f_mntonname); 993#endif 994 } 995 if ((fs->fs_flags & FS_TRIM) != 0) { 996 size = sizeof(int); 997 if (g_io_getattr("GEOM::candelete", cp, &size, 998 &ump->um_candelete) == 0) { 999 if (!ump->um_candelete) 1000 printf("WARNING: %s: TRIM flag on fs but disk " 1001 "does not support TRIM\n", 1002 mp->mnt_stat.f_mntonname); 1003 } else { 1004 printf("WARNING: %s: TRIM flag on fs but disk does " 1005 "not confirm that it supports TRIM\n", 1006 mp->mnt_stat.f_mntonname); 1007 ump->um_candelete = 0; 1008 } 1009 if (ump->um_candelete) { 1010 ump->um_trim_tq = taskqueue_create("trim", M_WAITOK, 1011 taskqueue_thread_enqueue, &ump->um_trim_tq); 1012 taskqueue_start_threads(&ump->um_trim_tq, 1, PVFS, 1013 "%s trim", mp->mnt_stat.f_mntonname); 1014 } 1015 } 1016 1017 ump->um_mountp = mp; 1018 ump->um_dev = dev; 1019 ump->um_devvp = devvp; 1020 ump->um_nindir = fs->fs_nindir; 1021 ump->um_bptrtodb = fs->fs_fsbtodb; 1022 ump->um_seqinc = fs->fs_frag; 1023 for (i = 0; i < MAXQUOTAS; i++) 1024 ump->um_quotas[i] = NULLVP; 1025#ifdef UFS_EXTATTR 1026 ufs_extattr_uepm_init(&ump->um_extattr); 1027#endif 1028 /* 1029 * Set FS local "last mounted on" information (NULL pad) 1030 */ 1031 bzero(fs->fs_fsmnt, MAXMNTLEN); 1032 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1033 mp->mnt_stat.f_iosize = fs->fs_bsize; 1034 1035 if (mp->mnt_flag & MNT_ROOTFS) { 1036 /* 1037 * Root mount; update timestamp in mount structure. 1038 * this will be used by the common root mount code 1039 * to update the system clock. 1040 */ 1041 mp->mnt_time = fs->fs_time; 1042 } 1043 1044 if (ronly == 0) { 1045 fs->fs_mtime = time_second; 1046 if ((fs->fs_flags & FS_DOSOFTDEP) && 1047 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1048 free(fs->fs_csp, M_UFSMNT); 1049 ffs_flushfiles(mp, FORCECLOSE, td); 1050 goto out; 1051 } 1052 if (devvp->v_type == VCHR && devvp->v_rdev != NULL) 1053 devvp->v_rdev->si_mountpt = mp; 1054 if (fs->fs_snapinum[0] != 0) 1055 ffs_snapshot_mount(mp); 1056 fs->fs_fmod = 1; 1057 fs->fs_clean = 0; 1058 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1059 } 1060 /* 1061 * Initialize filesystem stat information in mount struct. 1062 */ 1063 MNT_ILOCK(mp); 1064 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED | 1065 MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS | MNTK_USES_BCACHE; 1066 MNT_IUNLOCK(mp); 1067#ifdef UFS_EXTATTR 1068#ifdef UFS_EXTATTR_AUTOSTART 1069 /* 1070 * 1071 * Auto-starting does the following: 1072 * - check for /.attribute in the fs, and extattr_start if so 1073 * - for each file in .attribute, enable that file with 1074 * an attribute of the same name. 1075 * Not clear how to report errors -- probably eat them. 1076 * This would all happen while the filesystem was busy/not 1077 * available, so would effectively be "atomic". 1078 */ 1079 (void) ufs_extattr_autostart(mp, td); 1080#endif /* !UFS_EXTATTR_AUTOSTART */ 1081#endif /* !UFS_EXTATTR */ 1082 return (0); 1083out: 1084 if (bp) 1085 brelse(bp); 1086 if (cp != NULL) { 1087 DROP_GIANT(); 1088 g_topology_lock(); 1089 g_vfs_close(cp); 1090 g_topology_unlock(); 1091 PICKUP_GIANT(); 1092 } 1093 if (ump) { 1094 mtx_destroy(UFS_MTX(ump)); 1095 if (mp->mnt_gjprovider != NULL) { 1096 free(mp->mnt_gjprovider, M_UFSMNT); 1097 mp->mnt_gjprovider = NULL; 1098 } 1099 free(ump->um_fs, M_UFSMNT); 1100 free(ump, M_UFSMNT); 1101 mp->mnt_data = NULL; 1102 } 1103 dev_rel(dev); 1104 return (error); 1105} 1106 1107#include <sys/sysctl.h> 1108static int bigcgs = 0; 1109SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1110 1111/* 1112 * Sanity checks for loading old filesystem superblocks. 1113 * See ffs_oldfscompat_write below for unwound actions. 1114 * 1115 * XXX - Parts get retired eventually. 1116 * Unfortunately new bits get added. 1117 */ 1118static void 1119ffs_oldfscompat_read(fs, ump, sblockloc) 1120 struct fs *fs; 1121 struct ufsmount *ump; 1122 ufs2_daddr_t sblockloc; 1123{ 1124 off_t maxfilesize; 1125 1126 /* 1127 * If not yet done, update fs_flags location and value of fs_sblockloc. 1128 */ 1129 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1130 fs->fs_flags = fs->fs_old_flags; 1131 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1132 fs->fs_sblockloc = sblockloc; 1133 } 1134 /* 1135 * If not yet done, update UFS1 superblock with new wider fields. 1136 */ 1137 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1138 fs->fs_maxbsize = fs->fs_bsize; 1139 fs->fs_time = fs->fs_old_time; 1140 fs->fs_size = fs->fs_old_size; 1141 fs->fs_dsize = fs->fs_old_dsize; 1142 fs->fs_csaddr = fs->fs_old_csaddr; 1143 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1144 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1145 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1146 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1147 } 1148 if (fs->fs_magic == FS_UFS1_MAGIC && 1149 fs->fs_old_inodefmt < FS_44INODEFMT) { 1150 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1151 fs->fs_qbmask = ~fs->fs_bmask; 1152 fs->fs_qfmask = ~fs->fs_fmask; 1153 } 1154 if (fs->fs_magic == FS_UFS1_MAGIC) { 1155 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1156 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1157 if (fs->fs_maxfilesize > maxfilesize) 1158 fs->fs_maxfilesize = maxfilesize; 1159 } 1160 /* Compatibility for old filesystems */ 1161 if (fs->fs_avgfilesize <= 0) 1162 fs->fs_avgfilesize = AVFILESIZ; 1163 if (fs->fs_avgfpdir <= 0) 1164 fs->fs_avgfpdir = AFPDIR; 1165 if (bigcgs) { 1166 fs->fs_save_cgsize = fs->fs_cgsize; 1167 fs->fs_cgsize = fs->fs_bsize; 1168 } 1169} 1170 1171/* 1172 * Unwinding superblock updates for old filesystems. 1173 * See ffs_oldfscompat_read above for details. 1174 * 1175 * XXX - Parts get retired eventually. 1176 * Unfortunately new bits get added. 1177 */ 1178void 1179ffs_oldfscompat_write(fs, ump) 1180 struct fs *fs; 1181 struct ufsmount *ump; 1182{ 1183 1184 /* 1185 * Copy back UFS2 updated fields that UFS1 inspects. 1186 */ 1187 if (fs->fs_magic == FS_UFS1_MAGIC) { 1188 fs->fs_old_time = fs->fs_time; 1189 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1190 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1191 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1192 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1193 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1194 } 1195 if (bigcgs) { 1196 fs->fs_cgsize = fs->fs_save_cgsize; 1197 fs->fs_save_cgsize = 0; 1198 } 1199} 1200 1201/* 1202 * unmount system call 1203 */ 1204static int 1205ffs_unmount(mp, mntflags) 1206 struct mount *mp; 1207 int mntflags; 1208{ 1209 struct thread *td; 1210 struct ufsmount *ump = VFSTOUFS(mp); 1211 struct fs *fs; 1212 int error, flags, susp; 1213#ifdef UFS_EXTATTR 1214 int e_restart; 1215#endif 1216 1217 flags = 0; 1218 td = curthread; 1219 fs = ump->um_fs; 1220 susp = 0; 1221 if (mntflags & MNT_FORCE) { 1222 flags |= FORCECLOSE; 1223 susp = fs->fs_ronly == 0; 1224 } 1225#ifdef UFS_EXTATTR 1226 if ((error = ufs_extattr_stop(mp, td))) { 1227 if (error != EOPNOTSUPP) 1228 printf("WARNING: unmount %s: ufs_extattr_stop " 1229 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1230 error); 1231 e_restart = 0; 1232 } else { 1233 ufs_extattr_uepm_destroy(&ump->um_extattr); 1234 e_restart = 1; 1235 } 1236#endif 1237 if (susp) { 1238 error = vfs_write_suspend_umnt(mp); 1239 if (error != 0) 1240 goto fail1; 1241 } 1242 if (MOUNTEDSOFTDEP(mp)) 1243 error = softdep_flushfiles(mp, flags, td); 1244 else 1245 error = ffs_flushfiles(mp, flags, td); 1246 if (error != 0 && error != ENXIO) 1247 goto fail; 1248 1249 UFS_LOCK(ump); 1250 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1251 printf("WARNING: unmount %s: pending error: blocks %jd " 1252 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1253 fs->fs_pendinginodes); 1254 fs->fs_pendingblocks = 0; 1255 fs->fs_pendinginodes = 0; 1256 } 1257 UFS_UNLOCK(ump); 1258 if (MOUNTEDSOFTDEP(mp)) 1259 softdep_unmount(mp); 1260 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1261 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1262 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1263 if (error && error != ENXIO) { 1264 fs->fs_clean = 0; 1265 goto fail; 1266 } 1267 } 1268 if (susp) 1269 vfs_write_resume(mp, VR_START_WRITE); 1270 if (ump->um_trim_tq != NULL) { 1271 while (ump->um_trim_inflight != 0) 1272 pause("ufsutr", hz); 1273 taskqueue_drain_all(ump->um_trim_tq); 1274 taskqueue_free(ump->um_trim_tq); 1275 } 1276 DROP_GIANT(); 1277 g_topology_lock(); 1278 if (ump->um_fsckpid > 0) { 1279 /* 1280 * Return to normal read-only mode. 1281 */ 1282 error = g_access(ump->um_cp, 0, -1, 0); 1283 ump->um_fsckpid = 0; 1284 } 1285 g_vfs_close(ump->um_cp); 1286 g_topology_unlock(); 1287 PICKUP_GIANT(); 1288 if (ump->um_devvp->v_type == VCHR && ump->um_devvp->v_rdev != NULL) 1289 ump->um_devvp->v_rdev->si_mountpt = NULL; 1290 vrele(ump->um_devvp); 1291 dev_rel(ump->um_dev); 1292 mtx_destroy(UFS_MTX(ump)); 1293 if (mp->mnt_gjprovider != NULL) { 1294 free(mp->mnt_gjprovider, M_UFSMNT); 1295 mp->mnt_gjprovider = NULL; 1296 } 1297 free(fs->fs_csp, M_UFSMNT); 1298 free(fs, M_UFSMNT); 1299 free(ump, M_UFSMNT); 1300 mp->mnt_data = NULL; 1301 MNT_ILOCK(mp); 1302 mp->mnt_flag &= ~MNT_LOCAL; 1303 MNT_IUNLOCK(mp); 1304 return (error); 1305 1306fail: 1307 if (susp) 1308 vfs_write_resume(mp, VR_START_WRITE); 1309fail1: 1310#ifdef UFS_EXTATTR 1311 if (e_restart) { 1312 ufs_extattr_uepm_init(&ump->um_extattr); 1313#ifdef UFS_EXTATTR_AUTOSTART 1314 (void) ufs_extattr_autostart(mp, td); 1315#endif 1316 } 1317#endif 1318 1319 return (error); 1320} 1321 1322/* 1323 * Flush out all the files in a filesystem. 1324 */ 1325int 1326ffs_flushfiles(mp, flags, td) 1327 struct mount *mp; 1328 int flags; 1329 struct thread *td; 1330{ 1331 struct ufsmount *ump; 1332 int qerror, error; 1333 1334 ump = VFSTOUFS(mp); 1335 qerror = 0; 1336#ifdef QUOTA 1337 if (mp->mnt_flag & MNT_QUOTA) { 1338 int i; 1339 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1340 if (error) 1341 return (error); 1342 for (i = 0; i < MAXQUOTAS; i++) { 1343 error = quotaoff(td, mp, i); 1344 if (error != 0) { 1345 if ((flags & EARLYFLUSH) == 0) 1346 return (error); 1347 else 1348 qerror = error; 1349 } 1350 } 1351 1352 /* 1353 * Here we fall through to vflush again to ensure that 1354 * we have gotten rid of all the system vnodes, unless 1355 * quotas must not be closed. 1356 */ 1357 } 1358#endif 1359 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1360 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1361 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1362 return (error); 1363 ffs_snapshot_unmount(mp); 1364 flags |= FORCECLOSE; 1365 /* 1366 * Here we fall through to vflush again to ensure 1367 * that we have gotten rid of all the system vnodes. 1368 */ 1369 } 1370 1371 /* 1372 * Do not close system files if quotas were not closed, to be 1373 * able to sync the remaining dquots. The freeblks softupdate 1374 * workitems might hold a reference on a dquot, preventing 1375 * quotaoff() from completing. Next round of 1376 * softdep_flushworklist() iteration should process the 1377 * blockers, allowing the next run of quotaoff() to finally 1378 * flush held dquots. 1379 * 1380 * Otherwise, flush all the files. 1381 */ 1382 if (qerror == 0 && (error = vflush(mp, 0, flags, td)) != 0) 1383 return (error); 1384 1385 /* 1386 * Flush filesystem metadata. 1387 */ 1388 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1389 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1390 VOP_UNLOCK(ump->um_devvp, 0); 1391 return (error); 1392} 1393 1394/* 1395 * Get filesystem statistics. 1396 */ 1397static int 1398ffs_statfs(mp, sbp) 1399 struct mount *mp; 1400 struct statfs *sbp; 1401{ 1402 struct ufsmount *ump; 1403 struct fs *fs; 1404 1405 ump = VFSTOUFS(mp); 1406 fs = ump->um_fs; 1407 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1408 panic("ffs_statfs"); 1409 sbp->f_version = STATFS_VERSION; 1410 sbp->f_bsize = fs->fs_fsize; 1411 sbp->f_iosize = fs->fs_bsize; 1412 sbp->f_blocks = fs->fs_dsize; 1413 UFS_LOCK(ump); 1414 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1415 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1416 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1417 dbtofsb(fs, fs->fs_pendingblocks); 1418 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1419 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1420 UFS_UNLOCK(ump); 1421 sbp->f_namemax = NAME_MAX; 1422 return (0); 1423} 1424 1425static bool 1426sync_doupdate(struct inode *ip) 1427{ 1428 1429 return ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1430 IN_UPDATE)) != 0); 1431} 1432 1433/* 1434 * For a lazy sync, we only care about access times, quotas and the 1435 * superblock. Other filesystem changes are already converted to 1436 * cylinder group blocks or inode blocks updates and are written to 1437 * disk by syncer. 1438 */ 1439static int 1440ffs_sync_lazy(mp) 1441 struct mount *mp; 1442{ 1443 struct vnode *mvp, *vp; 1444 struct inode *ip; 1445 struct thread *td; 1446 int allerror, error; 1447 1448 allerror = 0; 1449 td = curthread; 1450 if ((mp->mnt_flag & MNT_NOATIME) != 0) 1451 goto qupdate; 1452 MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) { 1453 if (vp->v_type == VNON) { 1454 VI_UNLOCK(vp); 1455 continue; 1456 } 1457 ip = VTOI(vp); 1458 1459 /* 1460 * The IN_ACCESS flag is converted to IN_MODIFIED by 1461 * ufs_close() and ufs_getattr() by the calls to 1462 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1463 * Test also all the other timestamp flags too, to pick up 1464 * any other cases that could be missed. 1465 */ 1466 if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0) { 1467 VI_UNLOCK(vp); 1468 continue; 1469 } 1470 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, 1471 td)) != 0) 1472 continue; 1473 if (sync_doupdate(ip)) 1474 error = ffs_update(vp, 0); 1475 if (error != 0) 1476 allerror = error; 1477 vput(vp); 1478 } 1479 1480qupdate: 1481#ifdef QUOTA 1482 qsync(mp); 1483#endif 1484 1485 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1486 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1487 allerror = error; 1488 return (allerror); 1489} 1490 1491/* 1492 * Go through the disk queues to initiate sandbagged IO; 1493 * go through the inodes to write those that have been modified; 1494 * initiate the writing of the super block if it has been modified. 1495 * 1496 * Note: we are always called with the filesystem marked busy using 1497 * vfs_busy(). 1498 */ 1499static int 1500ffs_sync(mp, waitfor) 1501 struct mount *mp; 1502 int waitfor; 1503{ 1504 struct vnode *mvp, *vp, *devvp; 1505 struct thread *td; 1506 struct inode *ip; 1507 struct ufsmount *ump = VFSTOUFS(mp); 1508 struct fs *fs; 1509 int error, count, lockreq, allerror = 0; 1510 int suspend; 1511 int suspended; 1512 int secondary_writes; 1513 int secondary_accwrites; 1514 int softdep_deps; 1515 int softdep_accdeps; 1516 struct bufobj *bo; 1517 1518 suspend = 0; 1519 suspended = 0; 1520 td = curthread; 1521 fs = ump->um_fs; 1522 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) 1523 panic("%s: ffs_sync: modification on read-only filesystem", 1524 fs->fs_fsmnt); 1525 if (waitfor == MNT_LAZY) { 1526 if (!rebooting) 1527 return (ffs_sync_lazy(mp)); 1528 waitfor = MNT_NOWAIT; 1529 } 1530 1531 /* 1532 * Write back each (modified) inode. 1533 */ 1534 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1535 if (waitfor == MNT_SUSPEND) { 1536 suspend = 1; 1537 waitfor = MNT_WAIT; 1538 } 1539 if (waitfor == MNT_WAIT) 1540 lockreq = LK_EXCLUSIVE; 1541 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1542loop: 1543 /* Grab snapshot of secondary write counts */ 1544 MNT_ILOCK(mp); 1545 secondary_writes = mp->mnt_secondary_writes; 1546 secondary_accwrites = mp->mnt_secondary_accwrites; 1547 MNT_IUNLOCK(mp); 1548 1549 /* Grab snapshot of softdep dependency counts */ 1550 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1551 1552 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1553 /* 1554 * Depend on the vnode interlock to keep things stable enough 1555 * for a quick test. Since there might be hundreds of 1556 * thousands of vnodes, we cannot afford even a subroutine 1557 * call unless there's a good chance that we have work to do. 1558 */ 1559 if (vp->v_type == VNON) { 1560 VI_UNLOCK(vp); 1561 continue; 1562 } 1563 ip = VTOI(vp); 1564 if ((ip->i_flag & 1565 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1566 vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1567 VI_UNLOCK(vp); 1568 continue; 1569 } 1570 if ((error = vget(vp, lockreq, td)) != 0) { 1571 if (error == ENOENT || error == ENOLCK) { 1572 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1573 goto loop; 1574 } 1575 continue; 1576 } 1577 if ((error = ffs_syncvnode(vp, waitfor, 0)) != 0) 1578 allerror = error; 1579 vput(vp); 1580 } 1581 /* 1582 * Force stale filesystem control information to be flushed. 1583 */ 1584 if (waitfor == MNT_WAIT || rebooting) { 1585 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1586 allerror = error; 1587 /* Flushed work items may create new vnodes to clean */ 1588 if (allerror == 0 && count) 1589 goto loop; 1590 } 1591#ifdef QUOTA 1592 qsync(mp); 1593#endif 1594 1595 devvp = ump->um_devvp; 1596 bo = &devvp->v_bufobj; 1597 BO_LOCK(bo); 1598 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1599 BO_UNLOCK(bo); 1600 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1601 error = VOP_FSYNC(devvp, waitfor, td); 1602 VOP_UNLOCK(devvp, 0); 1603 if (MOUNTEDSOFTDEP(mp) && (error == 0 || error == EAGAIN)) 1604 error = ffs_sbupdate(ump, waitfor, 0); 1605 if (error != 0) 1606 allerror = error; 1607 if (allerror == 0 && waitfor == MNT_WAIT) 1608 goto loop; 1609 } else if (suspend != 0) { 1610 if (softdep_check_suspend(mp, 1611 devvp, 1612 softdep_deps, 1613 softdep_accdeps, 1614 secondary_writes, 1615 secondary_accwrites) != 0) { 1616 MNT_IUNLOCK(mp); 1617 goto loop; /* More work needed */ 1618 } 1619 mtx_assert(MNT_MTX(mp), MA_OWNED); 1620 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1621 MNT_IUNLOCK(mp); 1622 suspended = 1; 1623 } else 1624 BO_UNLOCK(bo); 1625 /* 1626 * Write back modified superblock. 1627 */ 1628 if (fs->fs_fmod != 0 && 1629 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1630 allerror = error; 1631 return (allerror); 1632} 1633 1634int 1635ffs_vget(mp, ino, flags, vpp) 1636 struct mount *mp; 1637 ino_t ino; 1638 int flags; 1639 struct vnode **vpp; 1640{ 1641 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1642} 1643 1644int 1645ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1646 struct mount *mp; 1647 ino_t ino; 1648 int flags; 1649 struct vnode **vpp; 1650 int ffs_flags; 1651{ 1652 struct fs *fs; 1653 struct inode *ip; 1654 struct ufsmount *ump; 1655 struct buf *bp; 1656 struct vnode *vp; 1657 struct cdev *dev; 1658 int error; 1659 1660 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1661 if (error || *vpp != NULL) 1662 return (error); 1663 1664 /* 1665 * We must promote to an exclusive lock for vnode creation. This 1666 * can happen if lookup is passed LOCKSHARED. 1667 */ 1668 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1669 flags &= ~LK_TYPE_MASK; 1670 flags |= LK_EXCLUSIVE; 1671 } 1672 1673 /* 1674 * We do not lock vnode creation as it is believed to be too 1675 * expensive for such rare case as simultaneous creation of vnode 1676 * for same ino by different processes. We just allow them to race 1677 * and check later to decide who wins. Let the race begin! 1678 */ 1679 1680 ump = VFSTOUFS(mp); 1681 dev = ump->um_dev; 1682 fs = ump->um_fs; 1683 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1684 1685 /* Allocate a new vnode/inode. */ 1686 error = getnewvnode("ufs", mp, fs->fs_magic == FS_UFS1_MAGIC ? 1687 &ffs_vnodeops1 : &ffs_vnodeops2, &vp); 1688 if (error) { 1689 *vpp = NULL; 1690 uma_zfree(uma_inode, ip); 1691 return (error); 1692 } 1693 /* 1694 * FFS supports recursive locking. 1695 */ 1696 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1697 VN_LOCK_AREC(vp); 1698 vp->v_data = ip; 1699 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1700 ip->i_vnode = vp; 1701 ip->i_ump = ump; 1702 ip->i_fs = fs; 1703 ip->i_dev = dev; 1704 ip->i_number = ino; 1705 ip->i_ea_refs = 0; 1706 ip->i_nextclustercg = -1; 1707#ifdef QUOTA 1708 { 1709 int i; 1710 for (i = 0; i < MAXQUOTAS; i++) 1711 ip->i_dquot[i] = NODQUOT; 1712 } 1713#endif 1714 1715 if (ffs_flags & FFSV_FORCEINSMQ) 1716 vp->v_vflag |= VV_FORCEINSMQ; 1717 error = insmntque(vp, mp); 1718 if (error != 0) { 1719 uma_zfree(uma_inode, ip); 1720 *vpp = NULL; 1721 return (error); 1722 } 1723 vp->v_vflag &= ~VV_FORCEINSMQ; 1724 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1725 if (error || *vpp != NULL) 1726 return (error); 1727 1728 /* Read in the disk contents for the inode, copy into the inode. */ 1729 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1730 (int)fs->fs_bsize, NOCRED, &bp); 1731 if (error) { 1732 /* 1733 * The inode does not contain anything useful, so it would 1734 * be misleading to leave it on its hash chain. With mode 1735 * still zero, it will be unlinked and returned to the free 1736 * list by vput(). 1737 */ 1738 brelse(bp); 1739 vput(vp); 1740 *vpp = NULL; 1741 return (error); 1742 } 1743 if (ip->i_ump->um_fstype == UFS1) 1744 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1745 else 1746 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1747 ffs_load_inode(bp, ip, fs, ino); 1748 if (DOINGSOFTDEP(vp)) 1749 softdep_load_inodeblock(ip); 1750 else 1751 ip->i_effnlink = ip->i_nlink; 1752 bqrelse(bp); 1753 1754 /* 1755 * Initialize the vnode from the inode, check for aliases. 1756 * Note that the underlying vnode may have changed. 1757 */ 1758 if (ip->i_ump->um_fstype == UFS1) 1759 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1760 else 1761 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1762 if (error) { 1763 vput(vp); 1764 *vpp = NULL; 1765 return (error); 1766 } 1767 1768 /* 1769 * Finish inode initialization. 1770 */ 1771 if (vp->v_type != VFIFO) { 1772 /* FFS supports shared locking for all files except fifos. */ 1773 VN_LOCK_ASHARE(vp); 1774 } 1775 1776 /* 1777 * Set up a generation number for this inode if it does not 1778 * already have one. This should only happen on old filesystems. 1779 */ 1780 if (ip->i_gen == 0) { 1781 ip->i_gen = arc4random() / 2 + 1; 1782 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1783 ip->i_flag |= IN_MODIFIED; 1784 DIP_SET(ip, i_gen, ip->i_gen); 1785 } 1786 } 1787#ifdef MAC 1788 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1789 /* 1790 * If this vnode is already allocated, and we're running 1791 * multi-label, attempt to perform a label association 1792 * from the extended attributes on the inode. 1793 */ 1794 error = mac_vnode_associate_extattr(mp, vp); 1795 if (error) { 1796 /* ufs_inactive will release ip->i_devvp ref. */ 1797 vput(vp); 1798 *vpp = NULL; 1799 return (error); 1800 } 1801 } 1802#endif 1803 1804 *vpp = vp; 1805 return (0); 1806} 1807 1808/* 1809 * File handle to vnode 1810 * 1811 * Have to be really careful about stale file handles: 1812 * - check that the inode number is valid 1813 * - call ffs_vget() to get the locked inode 1814 * - check for an unallocated inode (i_mode == 0) 1815 * - check that the given client host has export rights and return 1816 * those rights via. exflagsp and credanonp 1817 */ 1818static int 1819ffs_fhtovp(mp, fhp, flags, vpp) 1820 struct mount *mp; 1821 struct fid *fhp; 1822 int flags; 1823 struct vnode **vpp; 1824{ 1825 struct ufid *ufhp; 1826 struct fs *fs; 1827 1828 ufhp = (struct ufid *)fhp; 1829 fs = VFSTOUFS(mp)->um_fs; 1830 if (ufhp->ufid_ino < ROOTINO || 1831 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1832 return (ESTALE); 1833 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1834} 1835 1836/* 1837 * Initialize the filesystem. 1838 */ 1839static int 1840ffs_init(vfsp) 1841 struct vfsconf *vfsp; 1842{ 1843 1844 ffs_susp_initialize(); 1845 softdep_initialize(); 1846 return (ufs_init(vfsp)); 1847} 1848 1849/* 1850 * Undo the work of ffs_init(). 1851 */ 1852static int 1853ffs_uninit(vfsp) 1854 struct vfsconf *vfsp; 1855{ 1856 int ret; 1857 1858 ret = ufs_uninit(vfsp); 1859 softdep_uninitialize(); 1860 ffs_susp_uninitialize(); 1861 return (ret); 1862} 1863 1864/* 1865 * Write a superblock and associated information back to disk. 1866 */ 1867int 1868ffs_sbupdate(ump, waitfor, suspended) 1869 struct ufsmount *ump; 1870 int waitfor; 1871 int suspended; 1872{ 1873 struct fs *fs = ump->um_fs; 1874 struct buf *sbbp; 1875 struct buf *bp; 1876 int blks; 1877 void *space; 1878 int i, size, error, allerror = 0; 1879 1880 if (fs->fs_ronly == 1 && 1881 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1882 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1883 panic("ffs_sbupdate: write read-only filesystem"); 1884 /* 1885 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1886 */ 1887 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1888 (int)fs->fs_sbsize, 0, 0, 0); 1889 /* 1890 * First write back the summary information. 1891 */ 1892 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1893 space = fs->fs_csp; 1894 for (i = 0; i < blks; i += fs->fs_frag) { 1895 size = fs->fs_bsize; 1896 if (i + fs->fs_frag > blks) 1897 size = (blks - i) * fs->fs_fsize; 1898 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1899 size, 0, 0, 0); 1900 bcopy(space, bp->b_data, (u_int)size); 1901 space = (char *)space + size; 1902 if (suspended) 1903 bp->b_flags |= B_VALIDSUSPWRT; 1904 if (waitfor != MNT_WAIT) 1905 bawrite(bp); 1906 else if ((error = bwrite(bp)) != 0) 1907 allerror = error; 1908 } 1909 /* 1910 * Now write back the superblock itself. If any errors occurred 1911 * up to this point, then fail so that the superblock avoids 1912 * being written out as clean. 1913 */ 1914 if (allerror) { 1915 brelse(sbbp); 1916 return (allerror); 1917 } 1918 bp = sbbp; 1919 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1920 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1921 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1922 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1923 fs->fs_sblockloc = SBLOCK_UFS1; 1924 } 1925 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1926 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1927 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1928 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1929 fs->fs_sblockloc = SBLOCK_UFS2; 1930 } 1931 fs->fs_fmod = 0; 1932 fs->fs_time = time_second; 1933 if (MOUNTEDSOFTDEP(ump->um_mountp)) 1934 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1935 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1936 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1937 if (suspended) 1938 bp->b_flags |= B_VALIDSUSPWRT; 1939 if (waitfor != MNT_WAIT) 1940 bawrite(bp); 1941 else if ((error = bwrite(bp)) != 0) 1942 allerror = error; 1943 return (allerror); 1944} 1945 1946static int 1947ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1948 int attrnamespace, const char *attrname) 1949{ 1950 1951#ifdef UFS_EXTATTR 1952 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1953 attrname)); 1954#else 1955 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1956 attrname)); 1957#endif 1958} 1959 1960static void 1961ffs_ifree(struct ufsmount *ump, struct inode *ip) 1962{ 1963 1964 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1965 uma_zfree(uma_ufs1, ip->i_din1); 1966 else if (ip->i_din2 != NULL) 1967 uma_zfree(uma_ufs2, ip->i_din2); 1968 uma_zfree(uma_inode, ip); 1969} 1970 1971static int dobkgrdwrite = 1; 1972SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1973 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1974 1975/* 1976 * Complete a background write started from bwrite. 1977 */ 1978static void 1979ffs_backgroundwritedone(struct buf *bp) 1980{ 1981 struct bufobj *bufobj; 1982 struct buf *origbp; 1983 1984 /* 1985 * Find the original buffer that we are writing. 1986 */ 1987 bufobj = bp->b_bufobj; 1988 BO_LOCK(bufobj); 1989 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1990 panic("backgroundwritedone: lost buffer"); 1991 1992 /* 1993 * We should mark the cylinder group buffer origbp as 1994 * dirty, to not loose the failed write. 1995 */ 1996 if ((bp->b_ioflags & BIO_ERROR) != 0) 1997 origbp->b_vflags |= BV_BKGRDERR; 1998 BO_UNLOCK(bufobj); 1999 /* 2000 * Process dependencies then return any unfinished ones. 2001 */ 2002 pbrelvp(bp); 2003 if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) == 0) 2004 buf_complete(bp); 2005#ifdef SOFTUPDATES 2006 if (!LIST_EMPTY(&bp->b_dep)) 2007 softdep_move_dependencies(bp, origbp); 2008#endif 2009 /* 2010 * This buffer is marked B_NOCACHE so when it is released 2011 * by biodone it will be tossed. 2012 */ 2013 bp->b_flags |= B_NOCACHE; 2014 bp->b_flags &= ~B_CACHE; 2015 2016 /* 2017 * Prevent brelse() from trying to keep and re-dirtying bp on 2018 * errors. It causes b_bufobj dereference in 2019 * bdirty()/reassignbuf(), and b_bufobj was cleared in 2020 * pbrelvp() above. 2021 */ 2022 if ((bp->b_ioflags & BIO_ERROR) != 0) 2023 bp->b_flags |= B_INVAL; 2024 bufdone(bp); 2025 BO_LOCK(bufobj); 2026 /* 2027 * Clear the BV_BKGRDINPROG flag in the original buffer 2028 * and awaken it if it is waiting for the write to complete. 2029 * If BV_BKGRDINPROG is not set in the original buffer it must 2030 * have been released and re-instantiated - which is not legal. 2031 */ 2032 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2033 ("backgroundwritedone: lost buffer2")); 2034 origbp->b_vflags &= ~BV_BKGRDINPROG; 2035 if (origbp->b_vflags & BV_BKGRDWAIT) { 2036 origbp->b_vflags &= ~BV_BKGRDWAIT; 2037 wakeup(&origbp->b_xflags); 2038 } 2039 BO_UNLOCK(bufobj); 2040} 2041 2042 2043/* 2044 * Write, release buffer on completion. (Done by iodone 2045 * if async). Do not bother writing anything if the buffer 2046 * is invalid. 2047 * 2048 * Note that we set B_CACHE here, indicating that buffer is 2049 * fully valid and thus cacheable. This is true even of NFS 2050 * now so we set it generally. This could be set either here 2051 * or in biodone() since the I/O is synchronous. We put it 2052 * here. 2053 */ 2054static int 2055ffs_bufwrite(struct buf *bp) 2056{ 2057 struct buf *newbp; 2058 2059 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2060 if (bp->b_flags & B_INVAL) { 2061 brelse(bp); 2062 return (0); 2063 } 2064 2065 if (!BUF_ISLOCKED(bp)) 2066 panic("bufwrite: buffer is not busy???"); 2067 /* 2068 * If a background write is already in progress, delay 2069 * writing this block if it is asynchronous. Otherwise 2070 * wait for the background write to complete. 2071 */ 2072 BO_LOCK(bp->b_bufobj); 2073 if (bp->b_vflags & BV_BKGRDINPROG) { 2074 if (bp->b_flags & B_ASYNC) { 2075 BO_UNLOCK(bp->b_bufobj); 2076 bdwrite(bp); 2077 return (0); 2078 } 2079 bp->b_vflags |= BV_BKGRDWAIT; 2080 msleep(&bp->b_xflags, BO_LOCKPTR(bp->b_bufobj), PRIBIO, 2081 "bwrbg", 0); 2082 if (bp->b_vflags & BV_BKGRDINPROG) 2083 panic("bufwrite: still writing"); 2084 } 2085 bp->b_vflags &= ~BV_BKGRDERR; 2086 BO_UNLOCK(bp->b_bufobj); 2087 2088 /* 2089 * If this buffer is marked for background writing and we 2090 * do not have to wait for it, make a copy and write the 2091 * copy so as to leave this buffer ready for further use. 2092 * 2093 * This optimization eats a lot of memory. If we have a page 2094 * or buffer shortfall we can't do it. 2095 */ 2096 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2097 (bp->b_flags & B_ASYNC) && 2098 !vm_page_count_severe() && 2099 !buf_dirty_count_severe()) { 2100 KASSERT(bp->b_iodone == NULL, 2101 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2102 2103 /* get a new block */ 2104 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2105 if (newbp == NULL) 2106 goto normal_write; 2107 2108 KASSERT((bp->b_flags & B_UNMAPPED) == 0, ("Unmapped cg")); 2109 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2110 BO_LOCK(bp->b_bufobj); 2111 bp->b_vflags |= BV_BKGRDINPROG; 2112 BO_UNLOCK(bp->b_bufobj); 2113 newbp->b_xflags |= BX_BKGRDMARKER; 2114 newbp->b_lblkno = bp->b_lblkno; 2115 newbp->b_blkno = bp->b_blkno; 2116 newbp->b_offset = bp->b_offset; 2117 newbp->b_iodone = ffs_backgroundwritedone; 2118 newbp->b_flags |= B_ASYNC; 2119 newbp->b_flags &= ~B_INVAL; 2120 pbgetvp(bp->b_vp, newbp); 2121 2122#ifdef SOFTUPDATES 2123 /* 2124 * Move over the dependencies. If there are rollbacks, 2125 * leave the parent buffer dirtied as it will need to 2126 * be written again. 2127 */ 2128 if (LIST_EMPTY(&bp->b_dep) || 2129 softdep_move_dependencies(bp, newbp) == 0) 2130 bundirty(bp); 2131#else 2132 bundirty(bp); 2133#endif 2134 2135 /* 2136 * Initiate write on the copy, release the original. The 2137 * BKGRDINPROG flag prevents it from going away until 2138 * the background write completes. 2139 */ 2140 bqrelse(bp); 2141 bp = newbp; 2142 } else 2143 /* Mark the buffer clean */ 2144 bundirty(bp); 2145 2146 2147 /* Let the normal bufwrite do the rest for us */ 2148normal_write: 2149 return (bufwrite(bp)); 2150} 2151 2152 2153static void 2154ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2155{ 2156 struct vnode *vp; 2157 int error; 2158 struct buf *tbp; 2159 int nocopy; 2160 2161 vp = bo->__bo_vnode; 2162 if (bp->b_iocmd == BIO_WRITE) { 2163 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2164 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2165 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2166 panic("ffs_geom_strategy: bad I/O"); 2167 nocopy = bp->b_flags & B_NOCOPY; 2168 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2169 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2170 vp->v_rdev->si_snapdata != NULL) { 2171 if ((bp->b_flags & B_CLUSTER) != 0) { 2172 runningbufwakeup(bp); 2173 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2174 b_cluster.cluster_entry) { 2175 error = ffs_copyonwrite(vp, tbp); 2176 if (error != 0 && 2177 error != EOPNOTSUPP) { 2178 bp->b_error = error; 2179 bp->b_ioflags |= BIO_ERROR; 2180 bufdone(bp); 2181 return; 2182 } 2183 } 2184 bp->b_runningbufspace = bp->b_bufsize; 2185 atomic_add_long(&runningbufspace, 2186 bp->b_runningbufspace); 2187 } else { 2188 error = ffs_copyonwrite(vp, bp); 2189 if (error != 0 && error != EOPNOTSUPP) { 2190 bp->b_error = error; 2191 bp->b_ioflags |= BIO_ERROR; 2192 bufdone(bp); 2193 return; 2194 } 2195 } 2196 } 2197#ifdef SOFTUPDATES 2198 if ((bp->b_flags & B_CLUSTER) != 0) { 2199 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2200 b_cluster.cluster_entry) { 2201 if (!LIST_EMPTY(&tbp->b_dep)) 2202 buf_start(tbp); 2203 } 2204 } else { 2205 if (!LIST_EMPTY(&bp->b_dep)) 2206 buf_start(bp); 2207 } 2208 2209#endif 2210 } 2211 g_vfs_strategy(bo, bp); 2212} 2213 2214int 2215ffs_own_mount(const struct mount *mp) 2216{ 2217 2218 if (mp->mnt_op == &ufs_vfsops) 2219 return (1); 2220 return (0); 2221} 2222 2223#ifdef DDB 2224#ifdef SOFTUPDATES 2225 2226/* defined in ffs_softdep.c */ 2227extern void db_print_ffs(struct ufsmount *ump); 2228 2229DB_SHOW_COMMAND(ffs, db_show_ffs) 2230{ 2231 struct mount *mp; 2232 struct ufsmount *ump; 2233 2234 if (have_addr) { 2235 ump = VFSTOUFS((struct mount *)addr); 2236 db_print_ffs(ump); 2237 return; 2238 } 2239 2240 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2241 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2242 db_print_ffs(VFSTOUFS(mp)); 2243 } 2244} 2245 2246#endif /* SOFTUPDATES */ 2247#endif /* DDB */ 2248