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/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 79 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 80 81 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 82 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 83 ufs2_daddr_t); 84 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 85 static int ffs_sync_lazy(struct mount *mp); 86 87 static vfs_init_t ffs_init; 88 static vfs_uninit_t ffs_uninit; 89 static vfs_extattrctl_t ffs_extattrctl; 90 static vfs_cmount_t ffs_cmount; 91 static vfs_unmount_t ffs_unmount; 92 static vfs_mount_t ffs_mount; 93 static vfs_statfs_t ffs_statfs; 94 static vfs_fhtovp_t ffs_fhtovp; 95 static vfs_sync_t ffs_sync; 96 97 static 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 }; 112 113 VFS_SET(ufs_vfsops, ufs, 0); 114 MODULE_VERSION(ufs, 1); 115 116 static b_strategy_t ffs_geom_strategy; 117 static b_write_t ffs_bufwrite; 118 119 static 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 */ 137 static 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 }; 141 142 static int 143 ffs_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 g_topology_lock(); 243 /* 244 * Return to normal read-only mode. 245 */ 246 error = g_access(ump->um_cp, 0, -1, 0); 247 g_topology_unlock(); 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 error = vfs_write_suspend_umnt(mp); 258 if (error != 0) 259 return (error); 260 /* 261 * Check for and optionally get rid of files open 262 * for writing. 263 */ 264 flags = WRITECLOSE; 265 if (mp->mnt_flag & MNT_FORCE) 266 flags |= FORCECLOSE; 267 if (MOUNTEDSOFTDEP(mp)) { 268 error = softdep_flushfiles(mp, flags, td); 269 } else { 270 error = ffs_flushfiles(mp, flags, td); 271 } 272 if (error) { 273 vfs_write_resume(mp, 0); 274 return (error); 275 } 276 if (fs->fs_pendingblocks != 0 || 277 fs->fs_pendinginodes != 0) { 278 printf("WARNING: %s Update error: blocks %jd " 279 "files %d\n", fs->fs_fsmnt, 280 (intmax_t)fs->fs_pendingblocks, 281 fs->fs_pendinginodes); 282 fs->fs_pendingblocks = 0; 283 fs->fs_pendinginodes = 0; 284 } 285 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 286 fs->fs_clean = 1; 287 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 288 fs->fs_ronly = 0; 289 fs->fs_clean = 0; 290 vfs_write_resume(mp, 0); 291 return (error); 292 } 293 if (MOUNTEDSOFTDEP(mp)) 294 softdep_unmount(mp); 295 g_topology_lock(); 296 /* 297 * Drop our write and exclusive access. 298 */ 299 g_access(ump->um_cp, 0, -1, -1); 300 g_topology_unlock(); 301 fs->fs_ronly = 1; 302 MNT_ILOCK(mp); 303 mp->mnt_flag |= MNT_RDONLY; 304 MNT_IUNLOCK(mp); 305 /* 306 * Allow the writers to note that filesystem 307 * is ro now. 308 */ 309 vfs_write_resume(mp, 0); 310 } 311 if ((mp->mnt_flag & MNT_RELOAD) && 312 (error = ffs_reload(mp, td, 0)) != 0) 313 return (error); 314 if (fs->fs_ronly && 315 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 316 /* 317 * If we are running a checker, do not allow upgrade. 318 */ 319 if (ump->um_fsckpid > 0) { 320 vfs_mount_error(mp, 321 "Active checker, cannot upgrade to write"); 322 return (EINVAL); 323 } 324 /* 325 * If upgrade to read-write by non-root, then verify 326 * that user has necessary permissions on the device. 327 */ 328 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 329 error = VOP_ACCESS(devvp, VREAD | VWRITE, 330 td->td_ucred, td); 331 if (error) 332 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 333 if (error) { 334 VOP_UNLOCK(devvp, 0); 335 return (error); 336 } 337 VOP_UNLOCK(devvp, 0); 338 fs->fs_flags &= ~FS_UNCLEAN; 339 if (fs->fs_clean == 0) { 340 fs->fs_flags |= FS_UNCLEAN; 341 if ((mp->mnt_flag & MNT_FORCE) || 342 ((fs->fs_flags & 343 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 344 (fs->fs_flags & FS_DOSOFTDEP))) { 345 printf("WARNING: %s was not properly " 346 "dismounted\n", fs->fs_fsmnt); 347 } else { 348 vfs_mount_error(mp, 349 "R/W mount of %s denied. %s.%s", 350 fs->fs_fsmnt, 351 "Filesystem is not clean - run fsck", 352 (fs->fs_flags & FS_SUJ) == 0 ? "" : 353 " Forced mount will invalidate" 354 " journal contents"); 355 return (EPERM); 356 } 357 } 358 g_topology_lock(); 359 /* 360 * Request exclusive write access. 361 */ 362 error = g_access(ump->um_cp, 0, 1, 1); 363 g_topology_unlock(); 364 if (error) 365 return (error); 366 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 367 return (error); 368 fs->fs_ronly = 0; 369 MNT_ILOCK(mp); 370 mp->mnt_flag &= ~MNT_RDONLY; 371 MNT_IUNLOCK(mp); 372 fs->fs_mtime = time_second; 373 /* check to see if we need to start softdep */ 374 if ((fs->fs_flags & FS_DOSOFTDEP) && 375 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 376 vn_finished_write(mp); 377 return (error); 378 } 379 fs->fs_clean = 0; 380 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 381 vn_finished_write(mp); 382 return (error); 383 } 384 if (fs->fs_snapinum[0] != 0) 385 ffs_snapshot_mount(mp); 386 vn_finished_write(mp); 387 } 388 /* 389 * Soft updates is incompatible with "async", 390 * so if we are doing softupdates stop the user 391 * from setting the async flag in an update. 392 * Softdep_mount() clears it in an initial mount 393 * or ro->rw remount. 394 */ 395 if (MOUNTEDSOFTDEP(mp)) { 396 /* XXX: Reset too late ? */ 397 MNT_ILOCK(mp); 398 mp->mnt_flag &= ~MNT_ASYNC; 399 MNT_IUNLOCK(mp); 400 } 401 /* 402 * Keep MNT_ACLS flag if it is stored in superblock. 403 */ 404 if ((fs->fs_flags & FS_ACLS) != 0) { 405 /* XXX: Set too late ? */ 406 MNT_ILOCK(mp); 407 mp->mnt_flag |= MNT_ACLS; 408 MNT_IUNLOCK(mp); 409 } 410 411 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 412 /* XXX: Set too late ? */ 413 MNT_ILOCK(mp); 414 mp->mnt_flag |= MNT_NFS4ACLS; 415 MNT_IUNLOCK(mp); 416 } 417 /* 418 * If this is a request from fsck to clean up the filesystem, 419 * then allow the specified pid to proceed. 420 */ 421 if (fsckpid > 0) { 422 if (ump->um_fsckpid != 0) { 423 vfs_mount_error(mp, 424 "Active checker already running on %s", 425 fs->fs_fsmnt); 426 return (EINVAL); 427 } 428 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 429 ("soft updates enabled on read-only file system")); 430 g_topology_lock(); 431 /* 432 * Request write access. 433 */ 434 error = g_access(ump->um_cp, 0, 1, 0); 435 g_topology_unlock(); 436 if (error) { 437 vfs_mount_error(mp, 438 "Checker activation failed on %s", 439 fs->fs_fsmnt); 440 return (error); 441 } 442 ump->um_fsckpid = fsckpid; 443 if (fs->fs_snapinum[0] != 0) 444 ffs_snapshot_mount(mp); 445 fs->fs_mtime = time_second; 446 fs->fs_fmod = 1; 447 fs->fs_clean = 0; 448 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 449 } 450 451 /* 452 * If this is a snapshot request, take the snapshot. 453 */ 454 if (mp->mnt_flag & MNT_SNAPSHOT) 455 return (ffs_snapshot(mp, fspec)); 456 } 457 458 /* 459 * Not an update, or updating the name: look up the name 460 * and verify that it refers to a sensible disk device. 461 */ 462 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 463 if ((error = namei(&ndp)) != 0) 464 return (error); 465 NDFREE(&ndp, NDF_ONLY_PNBUF); 466 devvp = ndp.ni_vp; 467 if (!vn_isdisk(devvp, &error)) { 468 vput(devvp); 469 return (error); 470 } 471 472 /* 473 * If mount by non-root, then verify that user has necessary 474 * permissions on the device. 475 */ 476 accmode = VREAD; 477 if ((mp->mnt_flag & MNT_RDONLY) == 0) 478 accmode |= VWRITE; 479 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 480 if (error) 481 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 482 if (error) { 483 vput(devvp); 484 return (error); 485 } 486 487 if (mp->mnt_flag & MNT_UPDATE) { 488 /* 489 * Update only 490 * 491 * If it's not the same vnode, or at least the same device 492 * then it's not correct. 493 */ 494 495 if (devvp->v_rdev != ump->um_devvp->v_rdev) 496 error = EINVAL; /* needs translation */ 497 vput(devvp); 498 if (error) 499 return (error); 500 } else { 501 /* 502 * New mount 503 * 504 * We need the name for the mount point (also used for 505 * "last mounted on") copied in. If an error occurs, 506 * the mount point is discarded by the upper level code. 507 * Note that vfs_mount_alloc() populates f_mntonname for us. 508 */ 509 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 510 vrele(devvp); 511 return (error); 512 } 513 if (fsckpid > 0) { 514 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 515 ("soft updates enabled on read-only file system")); 516 ump = VFSTOUFS(mp); 517 fs = ump->um_fs; 518 g_topology_lock(); 519 /* 520 * Request write access. 521 */ 522 error = g_access(ump->um_cp, 0, 1, 0); 523 g_topology_unlock(); 524 if (error) { 525 printf("WARNING: %s: Checker activation " 526 "failed\n", fs->fs_fsmnt); 527 } else { 528 ump->um_fsckpid = fsckpid; 529 if (fs->fs_snapinum[0] != 0) 530 ffs_snapshot_mount(mp); 531 fs->fs_mtime = time_second; 532 fs->fs_clean = 0; 533 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 534 } 535 } 536 } 537 vfs_mountedfrom(mp, fspec); 538 return (0); 539 } 540 541 /* 542 * Compatibility with old mount system call. 543 */ 544 545 static int 546 ffs_cmount(struct mntarg *ma, void *data, uint64_t flags) 547 { 548 struct ufs_args args; 549 struct export_args exp; 550 int error; 551 552 if (data == NULL) 553 return (EINVAL); 554 error = copyin(data, &args, sizeof args); 555 if (error) 556 return (error); 557 vfs_oexport_conv(&args.export, &exp); 558 559 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 560 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 561 error = kernel_mount(ma, flags); 562 563 return (error); 564 } 565 566 /* 567 * Reload all incore data for a filesystem (used after running fsck on 568 * the root filesystem and finding things to fix). If the 'force' flag 569 * is 0, the filesystem must be mounted read-only. 570 * 571 * Things to do to update the mount: 572 * 1) invalidate all cached meta-data. 573 * 2) re-read superblock from disk. 574 * 3) re-read summary information from disk. 575 * 4) invalidate all inactive vnodes. 576 * 5) clear MNTK_SUSPEND2 and MNTK_SUSPENDED flags, allowing secondary 577 * writers, if requested. 578 * 6) invalidate all cached file data. 579 * 7) re-read inode data for all active vnodes. 580 */ 581 int 582 ffs_reload(struct mount *mp, struct thread *td, int flags) 583 { 584 struct vnode *vp, *mvp, *devvp; 585 struct inode *ip; 586 void *space; 587 struct buf *bp; 588 struct fs *fs, *newfs; 589 struct ufsmount *ump; 590 ufs2_daddr_t sblockloc; 591 int i, blks, size, error; 592 int32_t *lp; 593 594 ump = VFSTOUFS(mp); 595 596 MNT_ILOCK(mp); 597 if ((mp->mnt_flag & MNT_RDONLY) == 0 && (flags & FFSR_FORCE) == 0) { 598 MNT_IUNLOCK(mp); 599 return (EINVAL); 600 } 601 MNT_IUNLOCK(mp); 602 603 /* 604 * Step 1: invalidate all cached meta-data. 605 */ 606 devvp = VFSTOUFS(mp)->um_devvp; 607 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 608 if (vinvalbuf(devvp, 0, 0, 0) != 0) 609 panic("ffs_reload: dirty1"); 610 VOP_UNLOCK(devvp, 0); 611 612 /* 613 * Step 2: re-read superblock from disk. 614 */ 615 fs = VFSTOUFS(mp)->um_fs; 616 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 617 NOCRED, &bp)) != 0) 618 return (error); 619 newfs = (struct fs *)bp->b_data; 620 if ((newfs->fs_magic != FS_UFS1_MAGIC && 621 newfs->fs_magic != FS_UFS2_MAGIC) || 622 newfs->fs_bsize > MAXBSIZE || 623 newfs->fs_bsize < sizeof(struct fs)) { 624 brelse(bp); 625 return (EIO); /* XXX needs translation */ 626 } 627 /* 628 * Copy pointer fields back into superblock before copying in XXX 629 * new superblock. These should really be in the ufsmount. XXX 630 * Note that important parameters (eg fs_ncg) are unchanged. 631 */ 632 newfs->fs_csp = fs->fs_csp; 633 newfs->fs_maxcluster = fs->fs_maxcluster; 634 newfs->fs_contigdirs = fs->fs_contigdirs; 635 newfs->fs_active = fs->fs_active; 636 newfs->fs_ronly = fs->fs_ronly; 637 sblockloc = fs->fs_sblockloc; 638 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 639 brelse(bp); 640 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 641 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 642 UFS_LOCK(ump); 643 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 644 printf("WARNING: %s: reload pending error: blocks %jd " 645 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 646 fs->fs_pendinginodes); 647 fs->fs_pendingblocks = 0; 648 fs->fs_pendinginodes = 0; 649 } 650 UFS_UNLOCK(ump); 651 652 /* 653 * Step 3: re-read summary information from disk. 654 */ 655 size = fs->fs_cssize; 656 blks = howmany(size, fs->fs_fsize); 657 if (fs->fs_contigsumsize > 0) 658 size += fs->fs_ncg * sizeof(int32_t); 659 size += fs->fs_ncg * sizeof(u_int8_t); 660 free(fs->fs_csp, M_UFSMNT); 661 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 662 fs->fs_csp = space; 663 for (i = 0; i < blks; i += fs->fs_frag) { 664 size = fs->fs_bsize; 665 if (i + fs->fs_frag > blks) 666 size = (blks - i) * fs->fs_fsize; 667 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 668 NOCRED, &bp); 669 if (error) 670 return (error); 671 bcopy(bp->b_data, space, (u_int)size); 672 space = (char *)space + size; 673 brelse(bp); 674 } 675 /* 676 * We no longer know anything about clusters per cylinder group. 677 */ 678 if (fs->fs_contigsumsize > 0) { 679 fs->fs_maxcluster = lp = space; 680 for (i = 0; i < fs->fs_ncg; i++) 681 *lp++ = fs->fs_contigsumsize; 682 space = lp; 683 } 684 size = fs->fs_ncg * sizeof(u_int8_t); 685 fs->fs_contigdirs = (u_int8_t *)space; 686 bzero(fs->fs_contigdirs, size); 687 if ((flags & FFSR_UNSUSPEND) != 0) { 688 MNT_ILOCK(mp); 689 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | MNTK_SUSPEND2); 690 wakeup(&mp->mnt_flag); 691 MNT_IUNLOCK(mp); 692 } 693 694 loop: 695 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 696 /* 697 * Skip syncer vnode. 698 */ 699 if (vp->v_type == VNON) { 700 VI_UNLOCK(vp); 701 continue; 702 } 703 /* 704 * Step 4: invalidate all cached file data. 705 */ 706 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 707 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 708 goto loop; 709 } 710 if (vinvalbuf(vp, 0, 0, 0)) 711 panic("ffs_reload: dirty2"); 712 /* 713 * Step 5: re-read inode data for all active vnodes. 714 */ 715 ip = VTOI(vp); 716 error = 717 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 718 (int)fs->fs_bsize, NOCRED, &bp); 719 if (error) { 720 VOP_UNLOCK(vp, 0); 721 vrele(vp); 722 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 723 return (error); 724 } 725 ffs_load_inode(bp, ip, fs, ip->i_number); 726 ip->i_effnlink = ip->i_nlink; 727 brelse(bp); 728 VOP_UNLOCK(vp, 0); 729 vrele(vp); 730 } 731 return (0); 732 } 733 734 /* 735 * Possible superblock locations ordered from most to least likely. 736 */ 737 static int sblock_try[] = SBLOCKSEARCH; 738 739 /* 740 * Common code for mount and mountroot 741 */ 742 static int 743 ffs_mountfs(devvp, mp, td) 744 struct vnode *devvp; 745 struct mount *mp; 746 struct thread *td; 747 { 748 struct ufsmount *ump; 749 struct buf *bp; 750 struct fs *fs; 751 struct cdev *dev; 752 void *space; 753 ufs2_daddr_t sblockloc; 754 int error, i, blks, size, ronly; 755 int32_t *lp; 756 struct ucred *cred; 757 struct g_consumer *cp; 758 struct mount *nmp; 759 760 bp = NULL; 761 ump = NULL; 762 cred = td ? td->td_ucred : NOCRED; 763 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 764 765 KASSERT(devvp->v_type == VCHR, ("reclaimed devvp")); 766 dev = devvp->v_rdev; 767 if (atomic_cmpset_acq_ptr((uintptr_t *)&dev->si_mountpt, 0, 768 (uintptr_t)mp) == 0) { 769 VOP_UNLOCK(devvp, 0); 770 return (EBUSY); 771 } 772 g_topology_lock(); 773 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 774 g_topology_unlock(); 775 if (error != 0) { 776 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0); 777 VOP_UNLOCK(devvp, 0); 778 return (error); 779 } 780 dev_ref(dev); 781 devvp->v_bufobj.bo_ops = &ffs_ops; 782 VOP_UNLOCK(devvp, 0); 783 if (dev->si_iosize_max != 0) 784 mp->mnt_iosize_max = dev->si_iosize_max; 785 if (mp->mnt_iosize_max > MAXPHYS) 786 mp->mnt_iosize_max = MAXPHYS; 787 788 fs = NULL; 789 sblockloc = 0; 790 /* 791 * Try reading the superblock in each of its possible locations. 792 */ 793 for (i = 0; sblock_try[i] != -1; i++) { 794 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 795 error = EINVAL; 796 vfs_mount_error(mp, 797 "Invalid sectorsize %d for superblock size %d", 798 cp->provider->sectorsize, SBLOCKSIZE); 799 goto out; 800 } 801 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 802 cred, &bp)) != 0) 803 goto out; 804 fs = (struct fs *)bp->b_data; 805 sblockloc = sblock_try[i]; 806 if ((fs->fs_magic == FS_UFS1_MAGIC || 807 (fs->fs_magic == FS_UFS2_MAGIC && 808 (fs->fs_sblockloc == sblockloc || 809 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 810 fs->fs_bsize <= MAXBSIZE && 811 fs->fs_bsize >= sizeof(struct fs)) 812 break; 813 brelse(bp); 814 bp = NULL; 815 } 816 if (sblock_try[i] == -1) { 817 error = EINVAL; /* XXX needs translation */ 818 goto out; 819 } 820 fs->fs_fmod = 0; 821 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indices */ 822 fs->fs_flags &= ~FS_UNCLEAN; 823 if (fs->fs_clean == 0) { 824 fs->fs_flags |= FS_UNCLEAN; 825 if (ronly || (mp->mnt_flag & MNT_FORCE) || 826 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 827 (fs->fs_flags & FS_DOSOFTDEP))) { 828 printf("WARNING: %s was not properly dismounted\n", 829 fs->fs_fsmnt); 830 } else { 831 vfs_mount_error(mp, "R/W mount of %s denied. %s%s", 832 fs->fs_fsmnt, "Filesystem is not clean - run fsck.", 833 (fs->fs_flags & FS_SUJ) == 0 ? "" : 834 " Forced mount will invalidate journal contents"); 835 error = EPERM; 836 goto out; 837 } 838 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 839 (mp->mnt_flag & MNT_FORCE)) { 840 printf("WARNING: %s: lost blocks %jd files %d\n", 841 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 842 fs->fs_pendinginodes); 843 fs->fs_pendingblocks = 0; 844 fs->fs_pendinginodes = 0; 845 } 846 } 847 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 848 printf("WARNING: %s: mount pending error: blocks %jd " 849 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 850 fs->fs_pendinginodes); 851 fs->fs_pendingblocks = 0; 852 fs->fs_pendinginodes = 0; 853 } 854 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 855 #ifdef UFS_GJOURNAL 856 /* 857 * Get journal provider name. 858 */ 859 size = 1024; 860 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 861 if (g_io_getattr("GJOURNAL::provider", cp, &size, 862 mp->mnt_gjprovider) == 0) { 863 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 864 M_UFSMNT, M_WAITOK); 865 MNT_ILOCK(mp); 866 mp->mnt_flag |= MNT_GJOURNAL; 867 MNT_IUNLOCK(mp); 868 } else { 869 printf("WARNING: %s: GJOURNAL flag on fs " 870 "but no gjournal provider below\n", 871 mp->mnt_stat.f_mntonname); 872 free(mp->mnt_gjprovider, M_UFSMNT); 873 mp->mnt_gjprovider = NULL; 874 } 875 #else 876 printf("WARNING: %s: GJOURNAL flag on fs but no " 877 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 878 #endif 879 } else { 880 mp->mnt_gjprovider = NULL; 881 } 882 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 883 ump->um_cp = cp; 884 ump->um_bo = &devvp->v_bufobj; 885 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 886 if (fs->fs_magic == FS_UFS1_MAGIC) { 887 ump->um_fstype = UFS1; 888 ump->um_balloc = ffs_balloc_ufs1; 889 } else { 890 ump->um_fstype = UFS2; 891 ump->um_balloc = ffs_balloc_ufs2; 892 } 893 ump->um_blkatoff = ffs_blkatoff; 894 ump->um_truncate = ffs_truncate; 895 ump->um_update = ffs_update; 896 ump->um_valloc = ffs_valloc; 897 ump->um_vfree = ffs_vfree; 898 ump->um_ifree = ffs_ifree; 899 ump->um_rdonly = ffs_rdonly; 900 ump->um_snapgone = ffs_snapgone; 901 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 902 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 903 if (fs->fs_sbsize < SBLOCKSIZE) 904 bp->b_flags |= B_INVAL | B_NOCACHE; 905 brelse(bp); 906 bp = NULL; 907 fs = ump->um_fs; 908 ffs_oldfscompat_read(fs, ump, sblockloc); 909 fs->fs_ronly = ronly; 910 size = fs->fs_cssize; 911 blks = howmany(size, fs->fs_fsize); 912 if (fs->fs_contigsumsize > 0) 913 size += fs->fs_ncg * sizeof(int32_t); 914 size += fs->fs_ncg * sizeof(u_int8_t); 915 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 916 fs->fs_csp = space; 917 for (i = 0; i < blks; i += fs->fs_frag) { 918 size = fs->fs_bsize; 919 if (i + fs->fs_frag > blks) 920 size = (blks - i) * fs->fs_fsize; 921 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 922 cred, &bp)) != 0) { 923 free(fs->fs_csp, M_UFSMNT); 924 goto out; 925 } 926 bcopy(bp->b_data, space, (u_int)size); 927 space = (char *)space + size; 928 brelse(bp); 929 bp = NULL; 930 } 931 if (fs->fs_contigsumsize > 0) { 932 fs->fs_maxcluster = lp = space; 933 for (i = 0; i < fs->fs_ncg; i++) 934 *lp++ = fs->fs_contigsumsize; 935 space = lp; 936 } 937 size = fs->fs_ncg * sizeof(u_int8_t); 938 fs->fs_contigdirs = (u_int8_t *)space; 939 bzero(fs->fs_contigdirs, size); 940 fs->fs_active = NULL; 941 mp->mnt_data = ump; 942 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 943 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 944 nmp = NULL; 945 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 946 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 947 if (nmp) 948 vfs_rel(nmp); 949 vfs_getnewfsid(mp); 950 } 951 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 952 MNT_ILOCK(mp); 953 mp->mnt_flag |= MNT_LOCAL; 954 MNT_IUNLOCK(mp); 955 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 956 #ifdef MAC 957 MNT_ILOCK(mp); 958 mp->mnt_flag |= MNT_MULTILABEL; 959 MNT_IUNLOCK(mp); 960 #else 961 printf("WARNING: %s: multilabel flag on fs but " 962 "no MAC support\n", mp->mnt_stat.f_mntonname); 963 #endif 964 } 965 if ((fs->fs_flags & FS_ACLS) != 0) { 966 #ifdef UFS_ACL 967 MNT_ILOCK(mp); 968 969 if (mp->mnt_flag & MNT_NFS4ACLS) 970 printf("WARNING: %s: ACLs flag on fs conflicts with " 971 "\"nfsv4acls\" mount option; option ignored\n", 972 mp->mnt_stat.f_mntonname); 973 mp->mnt_flag &= ~MNT_NFS4ACLS; 974 mp->mnt_flag |= MNT_ACLS; 975 976 MNT_IUNLOCK(mp); 977 #else 978 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 979 mp->mnt_stat.f_mntonname); 980 #endif 981 } 982 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 983 #ifdef UFS_ACL 984 MNT_ILOCK(mp); 985 986 if (mp->mnt_flag & MNT_ACLS) 987 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 988 "with \"acls\" mount option; option ignored\n", 989 mp->mnt_stat.f_mntonname); 990 mp->mnt_flag &= ~MNT_ACLS; 991 mp->mnt_flag |= MNT_NFS4ACLS; 992 993 MNT_IUNLOCK(mp); 994 #else 995 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 996 "ACLs support\n", mp->mnt_stat.f_mntonname); 997 #endif 998 } 999 if ((fs->fs_flags & FS_TRIM) != 0) { 1000 size = sizeof(int); 1001 if (g_io_getattr("GEOM::candelete", cp, &size, 1002 &ump->um_candelete) == 0) { 1003 if (!ump->um_candelete) 1004 printf("WARNING: %s: TRIM flag on fs but disk " 1005 "does not support TRIM\n", 1006 mp->mnt_stat.f_mntonname); 1007 } else { 1008 printf("WARNING: %s: TRIM flag on fs but disk does " 1009 "not confirm that it supports TRIM\n", 1010 mp->mnt_stat.f_mntonname); 1011 ump->um_candelete = 0; 1012 } 1013 if (ump->um_candelete) { 1014 ump->um_trim_tq = taskqueue_create("trim", M_WAITOK, 1015 taskqueue_thread_enqueue, &ump->um_trim_tq); 1016 taskqueue_start_threads(&ump->um_trim_tq, 1, PVFS, 1017 "%s trim", mp->mnt_stat.f_mntonname); 1018 } 1019 } 1020 1021 ump->um_mountp = mp; 1022 ump->um_dev = dev; 1023 ump->um_devvp = devvp; 1024 ump->um_nindir = fs->fs_nindir; 1025 ump->um_bptrtodb = fs->fs_fsbtodb; 1026 ump->um_seqinc = fs->fs_frag; 1027 for (i = 0; i < MAXQUOTAS; i++) 1028 ump->um_quotas[i] = NULLVP; 1029 #ifdef UFS_EXTATTR 1030 ufs_extattr_uepm_init(&ump->um_extattr); 1031 #endif 1032 /* 1033 * Set FS local "last mounted on" information (NULL pad) 1034 */ 1035 bzero(fs->fs_fsmnt, MAXMNTLEN); 1036 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1037 mp->mnt_stat.f_iosize = fs->fs_bsize; 1038 1039 if (mp->mnt_flag & MNT_ROOTFS) { 1040 /* 1041 * Root mount; update timestamp in mount structure. 1042 * this will be used by the common root mount code 1043 * to update the system clock. 1044 */ 1045 mp->mnt_time = fs->fs_time; 1046 } 1047 1048 if (ronly == 0) { 1049 fs->fs_mtime = time_second; 1050 if ((fs->fs_flags & FS_DOSOFTDEP) && 1051 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1052 free(fs->fs_csp, M_UFSMNT); 1053 ffs_flushfiles(mp, FORCECLOSE, td); 1054 goto out; 1055 } 1056 if (fs->fs_snapinum[0] != 0) 1057 ffs_snapshot_mount(mp); 1058 fs->fs_fmod = 1; 1059 fs->fs_clean = 0; 1060 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1061 } 1062 /* 1063 * Initialize filesystem state information in mount struct. 1064 */ 1065 MNT_ILOCK(mp); 1066 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED | 1067 MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS | MNTK_USES_BCACHE; 1068 MNT_IUNLOCK(mp); 1069 #ifdef UFS_EXTATTR 1070 #ifdef UFS_EXTATTR_AUTOSTART 1071 /* 1072 * 1073 * Auto-starting does the following: 1074 * - check for /.attribute in the fs, and extattr_start if so 1075 * - for each file in .attribute, enable that file with 1076 * an attribute of the same name. 1077 * Not clear how to report errors -- probably eat them. 1078 * This would all happen while the filesystem was busy/not 1079 * available, so would effectively be "atomic". 1080 */ 1081 (void) ufs_extattr_autostart(mp, td); 1082 #endif /* !UFS_EXTATTR_AUTOSTART */ 1083 #endif /* !UFS_EXTATTR */ 1084 return (0); 1085 out: 1086 if (bp) 1087 brelse(bp); 1088 if (cp != NULL) { 1089 g_topology_lock(); 1090 g_vfs_close(cp); 1091 g_topology_unlock(); 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 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0); 1104 dev_rel(dev); 1105 return (error); 1106 } 1107 1108 #include <sys/sysctl.h> 1109 static int bigcgs = 0; 1110 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1111 1112 /* 1113 * Sanity checks for loading old filesystem superblocks. 1114 * See ffs_oldfscompat_write below for unwound actions. 1115 * 1116 * XXX - Parts get retired eventually. 1117 * Unfortunately new bits get added. 1118 */ 1119 static void 1120 ffs_oldfscompat_read(fs, ump, sblockloc) 1121 struct fs *fs; 1122 struct ufsmount *ump; 1123 ufs2_daddr_t sblockloc; 1124 { 1125 off_t maxfilesize; 1126 1127 /* 1128 * If not yet done, update fs_flags location and value of fs_sblockloc. 1129 */ 1130 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1131 fs->fs_flags = fs->fs_old_flags; 1132 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1133 fs->fs_sblockloc = sblockloc; 1134 } 1135 /* 1136 * If not yet done, update UFS1 superblock with new wider fields. 1137 */ 1138 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1139 fs->fs_maxbsize = fs->fs_bsize; 1140 fs->fs_time = fs->fs_old_time; 1141 fs->fs_size = fs->fs_old_size; 1142 fs->fs_dsize = fs->fs_old_dsize; 1143 fs->fs_csaddr = fs->fs_old_csaddr; 1144 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1145 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1146 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1147 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1148 } 1149 if (fs->fs_magic == FS_UFS1_MAGIC && 1150 fs->fs_old_inodefmt < FS_44INODEFMT) { 1151 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1152 fs->fs_qbmask = ~fs->fs_bmask; 1153 fs->fs_qfmask = ~fs->fs_fmask; 1154 } 1155 if (fs->fs_magic == FS_UFS1_MAGIC) { 1156 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1157 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1158 if (fs->fs_maxfilesize > maxfilesize) 1159 fs->fs_maxfilesize = maxfilesize; 1160 } 1161 /* Compatibility for old filesystems */ 1162 if (fs->fs_avgfilesize <= 0) 1163 fs->fs_avgfilesize = AVFILESIZ; 1164 if (fs->fs_avgfpdir <= 0) 1165 fs->fs_avgfpdir = AFPDIR; 1166 if (bigcgs) { 1167 fs->fs_save_cgsize = fs->fs_cgsize; 1168 fs->fs_cgsize = fs->fs_bsize; 1169 } 1170 } 1171 1172 /* 1173 * Unwinding superblock updates for old filesystems. 1174 * See ffs_oldfscompat_read above for details. 1175 * 1176 * XXX - Parts get retired eventually. 1177 * Unfortunately new bits get added. 1178 */ 1179 void 1180 ffs_oldfscompat_write(fs, ump) 1181 struct fs *fs; 1182 struct ufsmount *ump; 1183 { 1184 1185 /* 1186 * Copy back UFS2 updated fields that UFS1 inspects. 1187 */ 1188 if (fs->fs_magic == FS_UFS1_MAGIC) { 1189 fs->fs_old_time = fs->fs_time; 1190 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1191 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1192 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1193 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1194 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1195 } 1196 if (bigcgs) { 1197 fs->fs_cgsize = fs->fs_save_cgsize; 1198 fs->fs_save_cgsize = 0; 1199 } 1200 } 1201 1202 /* 1203 * unmount system call 1204 */ 1205 static int 1206 ffs_unmount(mp, mntflags) 1207 struct mount *mp; 1208 int mntflags; 1209 { 1210 struct thread *td; 1211 struct ufsmount *ump = VFSTOUFS(mp); 1212 struct fs *fs; 1213 int error, flags, susp; 1214 #ifdef UFS_EXTATTR 1215 int e_restart; 1216 #endif 1217 1218 flags = 0; 1219 td = curthread; 1220 fs = ump->um_fs; 1221 susp = 0; 1222 if (mntflags & MNT_FORCE) { 1223 flags |= FORCECLOSE; 1224 susp = fs->fs_ronly == 0; 1225 } 1226 #ifdef UFS_EXTATTR 1227 if ((error = ufs_extattr_stop(mp, td))) { 1228 if (error != EOPNOTSUPP) 1229 printf("WARNING: unmount %s: ufs_extattr_stop " 1230 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1231 error); 1232 e_restart = 0; 1233 } else { 1234 ufs_extattr_uepm_destroy(&ump->um_extattr); 1235 e_restart = 1; 1236 } 1237 #endif 1238 if (susp) { 1239 error = vfs_write_suspend_umnt(mp); 1240 if (error != 0) 1241 goto fail1; 1242 } 1243 if (MOUNTEDSOFTDEP(mp)) 1244 error = softdep_flushfiles(mp, flags, td); 1245 else 1246 error = ffs_flushfiles(mp, flags, td); 1247 if (error != 0 && error != ENXIO) 1248 goto fail; 1249 1250 UFS_LOCK(ump); 1251 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1252 printf("WARNING: unmount %s: pending error: blocks %jd " 1253 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1254 fs->fs_pendinginodes); 1255 fs->fs_pendingblocks = 0; 1256 fs->fs_pendinginodes = 0; 1257 } 1258 UFS_UNLOCK(ump); 1259 if (MOUNTEDSOFTDEP(mp)) 1260 softdep_unmount(mp); 1261 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1262 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1263 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1264 if (error && error != ENXIO) { 1265 fs->fs_clean = 0; 1266 goto fail; 1267 } 1268 } 1269 if (susp) 1270 vfs_write_resume(mp, VR_START_WRITE); 1271 if (ump->um_trim_tq != NULL) { 1272 while (ump->um_trim_inflight != 0) 1273 pause("ufsutr", hz); 1274 taskqueue_drain_all(ump->um_trim_tq); 1275 taskqueue_free(ump->um_trim_tq); 1276 } 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 atomic_store_rel_ptr((uintptr_t *)&ump->um_dev->si_mountpt, 0); 1288 vrele(ump->um_devvp); 1289 dev_rel(ump->um_dev); 1290 mtx_destroy(UFS_MTX(ump)); 1291 if (mp->mnt_gjprovider != NULL) { 1292 free(mp->mnt_gjprovider, M_UFSMNT); 1293 mp->mnt_gjprovider = NULL; 1294 } 1295 free(fs->fs_csp, M_UFSMNT); 1296 free(fs, M_UFSMNT); 1297 free(ump, M_UFSMNT); 1298 mp->mnt_data = NULL; 1299 MNT_ILOCK(mp); 1300 mp->mnt_flag &= ~MNT_LOCAL; 1301 MNT_IUNLOCK(mp); 1302 return (error); 1303 1304 fail: 1305 if (susp) 1306 vfs_write_resume(mp, VR_START_WRITE); 1307 fail1: 1308 #ifdef UFS_EXTATTR 1309 if (e_restart) { 1310 ufs_extattr_uepm_init(&ump->um_extattr); 1311 #ifdef UFS_EXTATTR_AUTOSTART 1312 (void) ufs_extattr_autostart(mp, td); 1313 #endif 1314 } 1315 #endif 1316 1317 return (error); 1318 } 1319 1320 /* 1321 * Flush out all the files in a filesystem. 1322 */ 1323 int 1324 ffs_flushfiles(mp, flags, td) 1325 struct mount *mp; 1326 int flags; 1327 struct thread *td; 1328 { 1329 struct ufsmount *ump; 1330 int qerror, error; 1331 1332 ump = VFSTOUFS(mp); 1333 qerror = 0; 1334 #ifdef QUOTA 1335 if (mp->mnt_flag & MNT_QUOTA) { 1336 int i; 1337 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1338 if (error) 1339 return (error); 1340 for (i = 0; i < MAXQUOTAS; i++) { 1341 error = quotaoff(td, mp, i); 1342 if (error != 0) { 1343 if ((flags & EARLYFLUSH) == 0) 1344 return (error); 1345 else 1346 qerror = error; 1347 } 1348 } 1349 1350 /* 1351 * Here we fall through to vflush again to ensure that 1352 * we have gotten rid of all the system vnodes, unless 1353 * quotas must not be closed. 1354 */ 1355 } 1356 #endif 1357 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1358 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1359 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1360 return (error); 1361 ffs_snapshot_unmount(mp); 1362 flags |= FORCECLOSE; 1363 /* 1364 * Here we fall through to vflush again to ensure 1365 * that we have gotten rid of all the system vnodes. 1366 */ 1367 } 1368 1369 /* 1370 * Do not close system files if quotas were not closed, to be 1371 * able to sync the remaining dquots. The freeblks softupdate 1372 * workitems might hold a reference on a dquot, preventing 1373 * quotaoff() from completing. Next round of 1374 * softdep_flushworklist() iteration should process the 1375 * blockers, allowing the next run of quotaoff() to finally 1376 * flush held dquots. 1377 * 1378 * Otherwise, flush all the files. 1379 */ 1380 if (qerror == 0 && (error = vflush(mp, 0, flags, td)) != 0) 1381 return (error); 1382 1383 /* 1384 * Flush filesystem metadata. 1385 */ 1386 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1387 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1388 VOP_UNLOCK(ump->um_devvp, 0); 1389 return (error); 1390 } 1391 1392 /* 1393 * Get filesystem statistics. 1394 */ 1395 static int 1396 ffs_statfs(mp, sbp) 1397 struct mount *mp; 1398 struct statfs *sbp; 1399 { 1400 struct ufsmount *ump; 1401 struct fs *fs; 1402 1403 ump = VFSTOUFS(mp); 1404 fs = ump->um_fs; 1405 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1406 panic("ffs_statfs"); 1407 sbp->f_version = STATFS_VERSION; 1408 sbp->f_bsize = fs->fs_fsize; 1409 sbp->f_iosize = fs->fs_bsize; 1410 sbp->f_blocks = fs->fs_dsize; 1411 UFS_LOCK(ump); 1412 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1413 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1414 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1415 dbtofsb(fs, fs->fs_pendingblocks); 1416 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1417 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1418 UFS_UNLOCK(ump); 1419 sbp->f_namemax = NAME_MAX; 1420 return (0); 1421 } 1422 1423 static bool 1424 sync_doupdate(struct inode *ip) 1425 { 1426 1427 return ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1428 IN_UPDATE)) != 0); 1429 } 1430 1431 /* 1432 * For a lazy sync, we only care about access times, quotas and the 1433 * superblock. Other filesystem changes are already converted to 1434 * cylinder group blocks or inode blocks updates and are written to 1435 * disk by syncer. 1436 */ 1437 static int 1438 ffs_sync_lazy(mp) 1439 struct mount *mp; 1440 { 1441 struct vnode *mvp, *vp; 1442 struct inode *ip; 1443 struct thread *td; 1444 int allerror, error; 1445 1446 allerror = 0; 1447 td = curthread; 1448 if ((mp->mnt_flag & MNT_NOATIME) != 0) 1449 goto qupdate; 1450 MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) { 1451 if (vp->v_type == VNON) { 1452 VI_UNLOCK(vp); 1453 continue; 1454 } 1455 ip = VTOI(vp); 1456 1457 /* 1458 * The IN_ACCESS flag is converted to IN_MODIFIED by 1459 * ufs_close() and ufs_getattr() by the calls to 1460 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1461 * Test also all the other timestamp flags too, to pick up 1462 * any other cases that could be missed. 1463 */ 1464 if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0) { 1465 VI_UNLOCK(vp); 1466 continue; 1467 } 1468 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, 1469 td)) != 0) 1470 continue; 1471 if (sync_doupdate(ip)) 1472 error = ffs_update(vp, 0); 1473 if (error != 0) 1474 allerror = error; 1475 vput(vp); 1476 } 1477 1478 qupdate: 1479 #ifdef QUOTA 1480 qsync(mp); 1481 #endif 1482 1483 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1484 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1485 allerror = error; 1486 return (allerror); 1487 } 1488 1489 /* 1490 * Go through the disk queues to initiate sandbagged IO; 1491 * go through the inodes to write those that have been modified; 1492 * initiate the writing of the super block if it has been modified. 1493 * 1494 * Note: we are always called with the filesystem marked busy using 1495 * vfs_busy(). 1496 */ 1497 static int 1498 ffs_sync(mp, waitfor) 1499 struct mount *mp; 1500 int waitfor; 1501 { 1502 struct vnode *mvp, *vp, *devvp; 1503 struct thread *td; 1504 struct inode *ip; 1505 struct ufsmount *ump = VFSTOUFS(mp); 1506 struct fs *fs; 1507 int error, count, lockreq, allerror = 0; 1508 int suspend; 1509 int suspended; 1510 int secondary_writes; 1511 int secondary_accwrites; 1512 int softdep_deps; 1513 int softdep_accdeps; 1514 struct bufobj *bo; 1515 1516 suspend = 0; 1517 suspended = 0; 1518 td = curthread; 1519 fs = ump->um_fs; 1520 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) 1521 panic("%s: ffs_sync: modification on read-only filesystem", 1522 fs->fs_fsmnt); 1523 if (waitfor == MNT_LAZY) { 1524 if (!rebooting) 1525 return (ffs_sync_lazy(mp)); 1526 waitfor = MNT_NOWAIT; 1527 } 1528 1529 /* 1530 * Write back each (modified) inode. 1531 */ 1532 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1533 if (waitfor == MNT_SUSPEND) { 1534 suspend = 1; 1535 waitfor = MNT_WAIT; 1536 } 1537 if (waitfor == MNT_WAIT) 1538 lockreq = LK_EXCLUSIVE; 1539 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1540 loop: 1541 /* Grab snapshot of secondary write counts */ 1542 MNT_ILOCK(mp); 1543 secondary_writes = mp->mnt_secondary_writes; 1544 secondary_accwrites = mp->mnt_secondary_accwrites; 1545 MNT_IUNLOCK(mp); 1546 1547 /* Grab snapshot of softdep dependency counts */ 1548 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1549 1550 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1551 /* 1552 * Depend on the vnode interlock to keep things stable enough 1553 * for a quick test. Since there might be hundreds of 1554 * thousands of vnodes, we cannot afford even a subroutine 1555 * call unless there's a good chance that we have work to do. 1556 */ 1557 if (vp->v_type == VNON) { 1558 VI_UNLOCK(vp); 1559 continue; 1560 } 1561 ip = VTOI(vp); 1562 if ((ip->i_flag & 1563 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1564 vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1565 VI_UNLOCK(vp); 1566 continue; 1567 } 1568 if ((error = vget(vp, lockreq, td)) != 0) { 1569 if (error == ENOENT || error == ENOLCK) { 1570 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1571 goto loop; 1572 } 1573 continue; 1574 } 1575 if ((error = ffs_syncvnode(vp, waitfor, 0)) != 0) 1576 allerror = error; 1577 vput(vp); 1578 } 1579 /* 1580 * Force stale filesystem control information to be flushed. 1581 */ 1582 if (waitfor == MNT_WAIT || rebooting) { 1583 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1584 allerror = error; 1585 /* Flushed work items may create new vnodes to clean */ 1586 if (allerror == 0 && count) 1587 goto loop; 1588 } 1589 #ifdef QUOTA 1590 qsync(mp); 1591 #endif 1592 1593 devvp = ump->um_devvp; 1594 bo = &devvp->v_bufobj; 1595 BO_LOCK(bo); 1596 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1597 BO_UNLOCK(bo); 1598 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1599 error = VOP_FSYNC(devvp, waitfor, td); 1600 VOP_UNLOCK(devvp, 0); 1601 if (MOUNTEDSOFTDEP(mp) && (error == 0 || error == EAGAIN)) 1602 error = ffs_sbupdate(ump, waitfor, 0); 1603 if (error != 0) 1604 allerror = error; 1605 if (allerror == 0 && waitfor == MNT_WAIT) 1606 goto loop; 1607 } else if (suspend != 0) { 1608 if (softdep_check_suspend(mp, 1609 devvp, 1610 softdep_deps, 1611 softdep_accdeps, 1612 secondary_writes, 1613 secondary_accwrites) != 0) { 1614 MNT_IUNLOCK(mp); 1615 goto loop; /* More work needed */ 1616 } 1617 mtx_assert(MNT_MTX(mp), MA_OWNED); 1618 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1619 MNT_IUNLOCK(mp); 1620 suspended = 1; 1621 } else 1622 BO_UNLOCK(bo); 1623 /* 1624 * Write back modified superblock. 1625 */ 1626 if (fs->fs_fmod != 0 && 1627 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1628 allerror = error; 1629 return (allerror); 1630 } 1631 1632 int 1633 ffs_vget(mp, ino, flags, vpp) 1634 struct mount *mp; 1635 ino_t ino; 1636 int flags; 1637 struct vnode **vpp; 1638 { 1639 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1640 } 1641 1642 int 1643 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1644 struct mount *mp; 1645 ino_t ino; 1646 int flags; 1647 struct vnode **vpp; 1648 int ffs_flags; 1649 { 1650 struct fs *fs; 1651 struct inode *ip; 1652 struct ufsmount *ump; 1653 struct buf *bp; 1654 struct vnode *vp; 1655 int error; 1656 1657 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1658 if (error || *vpp != NULL) 1659 return (error); 1660 1661 /* 1662 * We must promote to an exclusive lock for vnode creation. This 1663 * can happen if lookup is passed LOCKSHARED. 1664 */ 1665 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1666 flags &= ~LK_TYPE_MASK; 1667 flags |= LK_EXCLUSIVE; 1668 } 1669 1670 /* 1671 * We do not lock vnode creation as it is believed to be too 1672 * expensive for such rare case as simultaneous creation of vnode 1673 * for same ino by different processes. We just allow them to race 1674 * and check later to decide who wins. Let the race begin! 1675 */ 1676 1677 ump = VFSTOUFS(mp); 1678 fs = ump->um_fs; 1679 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1680 1681 /* Allocate a new vnode/inode. */ 1682 error = getnewvnode("ufs", mp, fs->fs_magic == FS_UFS1_MAGIC ? 1683 &ffs_vnodeops1 : &ffs_vnodeops2, &vp); 1684 if (error) { 1685 *vpp = NULL; 1686 uma_zfree(uma_inode, ip); 1687 return (error); 1688 } 1689 /* 1690 * FFS supports recursive locking. 1691 */ 1692 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1693 VN_LOCK_AREC(vp); 1694 vp->v_data = ip; 1695 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1696 ip->i_vnode = vp; 1697 ip->i_ump = ump; 1698 ip->i_number = ino; 1699 ip->i_ea_refs = 0; 1700 ip->i_nextclustercg = -1; 1701 ip->i_flag = fs->fs_magic == FS_UFS1_MAGIC ? 0 : IN_UFS2; 1702 #ifdef QUOTA 1703 { 1704 int i; 1705 for (i = 0; i < MAXQUOTAS; i++) 1706 ip->i_dquot[i] = NODQUOT; 1707 } 1708 #endif 1709 1710 if (ffs_flags & FFSV_FORCEINSMQ) 1711 vp->v_vflag |= VV_FORCEINSMQ; 1712 error = insmntque(vp, mp); 1713 if (error != 0) { 1714 uma_zfree(uma_inode, ip); 1715 *vpp = NULL; 1716 return (error); 1717 } 1718 vp->v_vflag &= ~VV_FORCEINSMQ; 1719 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1720 if (error || *vpp != NULL) 1721 return (error); 1722 1723 /* Read in the disk contents for the inode, copy into the inode. */ 1724 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1725 (int)fs->fs_bsize, NOCRED, &bp); 1726 if (error) { 1727 /* 1728 * The inode does not contain anything useful, so it would 1729 * be misleading to leave it on its hash chain. With mode 1730 * still zero, it will be unlinked and returned to the free 1731 * list by vput(). 1732 */ 1733 brelse(bp); 1734 vput(vp); 1735 *vpp = NULL; 1736 return (error); 1737 } 1738 if (I_IS_UFS1(ip)) 1739 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1740 else 1741 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1742 ffs_load_inode(bp, ip, fs, ino); 1743 if (DOINGSOFTDEP(vp)) 1744 softdep_load_inodeblock(ip); 1745 else 1746 ip->i_effnlink = ip->i_nlink; 1747 bqrelse(bp); 1748 1749 /* 1750 * Initialize the vnode from the inode, check for aliases. 1751 * Note that the underlying vnode may have changed. 1752 */ 1753 error = ufs_vinit(mp, I_IS_UFS1(ip) ? &ffs_fifoops1 : &ffs_fifoops2, 1754 &vp); 1755 if (error) { 1756 vput(vp); 1757 *vpp = NULL; 1758 return (error); 1759 } 1760 1761 /* 1762 * Finish inode initialization. 1763 */ 1764 if (vp->v_type != VFIFO) { 1765 /* FFS supports shared locking for all files except fifos. */ 1766 VN_LOCK_ASHARE(vp); 1767 } 1768 1769 /* 1770 * Set up a generation number for this inode if it does not 1771 * already have one. This should only happen on old filesystems. 1772 */ 1773 if (ip->i_gen == 0) { 1774 while (ip->i_gen == 0) 1775 ip->i_gen = arc4random(); 1776 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1777 ip->i_flag |= IN_MODIFIED; 1778 DIP_SET(ip, i_gen, ip->i_gen); 1779 } 1780 } 1781 #ifdef MAC 1782 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1783 /* 1784 * If this vnode is already allocated, and we're running 1785 * multi-label, attempt to perform a label association 1786 * from the extended attributes on the inode. 1787 */ 1788 error = mac_vnode_associate_extattr(mp, vp); 1789 if (error) { 1790 /* ufs_inactive will release ip->i_devvp ref. */ 1791 vput(vp); 1792 *vpp = NULL; 1793 return (error); 1794 } 1795 } 1796 #endif 1797 1798 *vpp = vp; 1799 return (0); 1800 } 1801 1802 /* 1803 * File handle to vnode 1804 * 1805 * Have to be really careful about stale file handles: 1806 * - check that the inode number is valid 1807 * - for UFS2 check that the inode number is initialized 1808 * - call ffs_vget() to get the locked inode 1809 * - check for an unallocated inode (i_mode == 0) 1810 * - check that the given client host has export rights and return 1811 * those rights via. exflagsp and credanonp 1812 */ 1813 static int 1814 ffs_fhtovp(mp, fhp, flags, vpp) 1815 struct mount *mp; 1816 struct fid *fhp; 1817 int flags; 1818 struct vnode **vpp; 1819 { 1820 struct ufid *ufhp; 1821 struct ufsmount *ump; 1822 struct fs *fs; 1823 struct cg *cgp; 1824 struct buf *bp; 1825 ino_t ino; 1826 u_int cg; 1827 int error; 1828 1829 ufhp = (struct ufid *)fhp; 1830 ino = ufhp->ufid_ino; 1831 ump = VFSTOUFS(mp); 1832 fs = ump->um_fs; 1833 if (ino < ROOTINO || ino >= fs->fs_ncg * fs->fs_ipg) 1834 return (ESTALE); 1835 /* 1836 * Need to check if inode is initialized because UFS2 does lazy 1837 * initialization and nfs_fhtovp can offer arbitrary inode numbers. 1838 */ 1839 if (fs->fs_magic != FS_UFS2_MAGIC) 1840 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1841 cg = ino_to_cg(fs, ino); 1842 error = bread(ump->um_devvp, fsbtodb(fs, cgtod(fs, cg)), 1843 (int)fs->fs_cgsize, NOCRED, &bp); 1844 if (error) 1845 return (error); 1846 cgp = (struct cg *)bp->b_data; 1847 if (!cg_chkmagic(cgp) || ino >= cg * fs->fs_ipg + cgp->cg_initediblk) { 1848 brelse(bp); 1849 return (ESTALE); 1850 } 1851 brelse(bp); 1852 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1853 } 1854 1855 /* 1856 * Initialize the filesystem. 1857 */ 1858 static int 1859 ffs_init(vfsp) 1860 struct vfsconf *vfsp; 1861 { 1862 1863 ffs_susp_initialize(); 1864 softdep_initialize(); 1865 return (ufs_init(vfsp)); 1866 } 1867 1868 /* 1869 * Undo the work of ffs_init(). 1870 */ 1871 static int 1872 ffs_uninit(vfsp) 1873 struct vfsconf *vfsp; 1874 { 1875 int ret; 1876 1877 ret = ufs_uninit(vfsp); 1878 softdep_uninitialize(); 1879 ffs_susp_uninitialize(); 1880 return (ret); 1881 } 1882 1883 /* 1884 * Write a superblock and associated information back to disk. 1885 */ 1886 int 1887 ffs_sbupdate(ump, waitfor, suspended) 1888 struct ufsmount *ump; 1889 int waitfor; 1890 int suspended; 1891 { 1892 struct fs *fs = ump->um_fs; 1893 struct buf *sbbp; 1894 struct buf *bp; 1895 int blks; 1896 void *space; 1897 int i, size, error, allerror = 0; 1898 1899 if (fs->fs_ronly == 1 && 1900 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1901 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1902 panic("ffs_sbupdate: write read-only filesystem"); 1903 /* 1904 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1905 */ 1906 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1907 (int)fs->fs_sbsize, 0, 0, 0); 1908 /* 1909 * First write back the summary information. 1910 */ 1911 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1912 space = fs->fs_csp; 1913 for (i = 0; i < blks; i += fs->fs_frag) { 1914 size = fs->fs_bsize; 1915 if (i + fs->fs_frag > blks) 1916 size = (blks - i) * fs->fs_fsize; 1917 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1918 size, 0, 0, 0); 1919 bcopy(space, bp->b_data, (u_int)size); 1920 space = (char *)space + size; 1921 if (suspended) 1922 bp->b_flags |= B_VALIDSUSPWRT; 1923 if (waitfor != MNT_WAIT) 1924 bawrite(bp); 1925 else if ((error = bwrite(bp)) != 0) 1926 allerror = error; 1927 } 1928 /* 1929 * Now write back the superblock itself. If any errors occurred 1930 * up to this point, then fail so that the superblock avoids 1931 * being written out as clean. 1932 */ 1933 if (allerror) { 1934 brelse(sbbp); 1935 return (allerror); 1936 } 1937 bp = sbbp; 1938 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1939 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1940 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1941 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1942 fs->fs_sblockloc = SBLOCK_UFS1; 1943 } 1944 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1945 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1946 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1947 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1948 fs->fs_sblockloc = SBLOCK_UFS2; 1949 } 1950 fs->fs_fmod = 0; 1951 fs->fs_time = time_second; 1952 if (MOUNTEDSOFTDEP(ump->um_mountp)) 1953 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1954 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1955 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1956 if (suspended) 1957 bp->b_flags |= B_VALIDSUSPWRT; 1958 if (waitfor != MNT_WAIT) 1959 bawrite(bp); 1960 else if ((error = bwrite(bp)) != 0) 1961 allerror = error; 1962 return (allerror); 1963 } 1964 1965 static int 1966 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1967 int attrnamespace, const char *attrname) 1968 { 1969 1970 #ifdef UFS_EXTATTR 1971 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1972 attrname)); 1973 #else 1974 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1975 attrname)); 1976 #endif 1977 } 1978 1979 static void 1980 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1981 { 1982 1983 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1984 uma_zfree(uma_ufs1, ip->i_din1); 1985 else if (ip->i_din2 != NULL) 1986 uma_zfree(uma_ufs2, ip->i_din2); 1987 uma_zfree(uma_inode, ip); 1988 } 1989 1990 static int dobkgrdwrite = 1; 1991 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1992 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1993 1994 /* 1995 * Complete a background write started from bwrite. 1996 */ 1997 static void 1998 ffs_backgroundwritedone(struct buf *bp) 1999 { 2000 struct bufobj *bufobj; 2001 struct buf *origbp; 2002 2003 /* 2004 * Find the original buffer that we are writing. 2005 */ 2006 bufobj = bp->b_bufobj; 2007 BO_LOCK(bufobj); 2008 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 2009 panic("backgroundwritedone: lost buffer"); 2010 2011 /* 2012 * We should mark the cylinder group buffer origbp as 2013 * dirty, to not loose the failed write. 2014 */ 2015 if ((bp->b_ioflags & BIO_ERROR) != 0) 2016 origbp->b_vflags |= BV_BKGRDERR; 2017 BO_UNLOCK(bufobj); 2018 /* 2019 * Process dependencies then return any unfinished ones. 2020 */ 2021 pbrelvp(bp); 2022 if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) == 0) 2023 buf_complete(bp); 2024 #ifdef SOFTUPDATES 2025 if (!LIST_EMPTY(&bp->b_dep)) 2026 softdep_move_dependencies(bp, origbp); 2027 #endif 2028 /* 2029 * This buffer is marked B_NOCACHE so when it is released 2030 * by biodone it will be tossed. 2031 */ 2032 bp->b_flags |= B_NOCACHE; 2033 bp->b_flags &= ~B_CACHE; 2034 2035 /* 2036 * Prevent brelse() from trying to keep and re-dirtying bp on 2037 * errors. It causes b_bufobj dereference in 2038 * bdirty()/reassignbuf(), and b_bufobj was cleared in 2039 * pbrelvp() above. 2040 */ 2041 if ((bp->b_ioflags & BIO_ERROR) != 0) 2042 bp->b_flags |= B_INVAL; 2043 bufdone(bp); 2044 BO_LOCK(bufobj); 2045 /* 2046 * Clear the BV_BKGRDINPROG flag in the original buffer 2047 * and awaken it if it is waiting for the write to complete. 2048 * If BV_BKGRDINPROG is not set in the original buffer it must 2049 * have been released and re-instantiated - which is not legal. 2050 */ 2051 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2052 ("backgroundwritedone: lost buffer2")); 2053 origbp->b_vflags &= ~BV_BKGRDINPROG; 2054 if (origbp->b_vflags & BV_BKGRDWAIT) { 2055 origbp->b_vflags &= ~BV_BKGRDWAIT; 2056 wakeup(&origbp->b_xflags); 2057 } 2058 BO_UNLOCK(bufobj); 2059 } 2060 2061 2062 /* 2063 * Write, release buffer on completion. (Done by iodone 2064 * if async). Do not bother writing anything if the buffer 2065 * is invalid. 2066 * 2067 * Note that we set B_CACHE here, indicating that buffer is 2068 * fully valid and thus cacheable. This is true even of NFS 2069 * now so we set it generally. This could be set either here 2070 * or in biodone() since the I/O is synchronous. We put it 2071 * here. 2072 */ 2073 static int 2074 ffs_bufwrite(struct buf *bp) 2075 { 2076 struct buf *newbp; 2077 2078 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2079 if (bp->b_flags & B_INVAL) { 2080 brelse(bp); 2081 return (0); 2082 } 2083 2084 if (!BUF_ISLOCKED(bp)) 2085 panic("bufwrite: buffer is not busy???"); 2086 /* 2087 * If a background write is already in progress, delay 2088 * writing this block if it is asynchronous. Otherwise 2089 * wait for the background write to complete. 2090 */ 2091 BO_LOCK(bp->b_bufobj); 2092 if (bp->b_vflags & BV_BKGRDINPROG) { 2093 if (bp->b_flags & B_ASYNC) { 2094 BO_UNLOCK(bp->b_bufobj); 2095 bdwrite(bp); 2096 return (0); 2097 } 2098 bp->b_vflags |= BV_BKGRDWAIT; 2099 msleep(&bp->b_xflags, BO_LOCKPTR(bp->b_bufobj), PRIBIO, 2100 "bwrbg", 0); 2101 if (bp->b_vflags & BV_BKGRDINPROG) 2102 panic("bufwrite: still writing"); 2103 } 2104 bp->b_vflags &= ~BV_BKGRDERR; 2105 BO_UNLOCK(bp->b_bufobj); 2106 2107 /* 2108 * If this buffer is marked for background writing and we 2109 * do not have to wait for it, make a copy and write the 2110 * copy so as to leave this buffer ready for further use. 2111 * 2112 * This optimization eats a lot of memory. If we have a page 2113 * or buffer shortfall we can't do it. 2114 */ 2115 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2116 (bp->b_flags & B_ASYNC) && 2117 !vm_page_count_severe() && 2118 !buf_dirty_count_severe()) { 2119 KASSERT(bp->b_iodone == NULL, 2120 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2121 2122 /* get a new block */ 2123 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2124 if (newbp == NULL) 2125 goto normal_write; 2126 2127 KASSERT(buf_mapped(bp), ("Unmapped cg")); 2128 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2129 BO_LOCK(bp->b_bufobj); 2130 bp->b_vflags |= BV_BKGRDINPROG; 2131 BO_UNLOCK(bp->b_bufobj); 2132 newbp->b_xflags |= BX_BKGRDMARKER; 2133 newbp->b_lblkno = bp->b_lblkno; 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 pbgetvp(bp->b_vp, newbp); 2140 2141 #ifdef SOFTUPDATES 2142 /* 2143 * Move over the dependencies. If there are rollbacks, 2144 * leave the parent buffer dirtied as it will need to 2145 * be written again. 2146 */ 2147 if (LIST_EMPTY(&bp->b_dep) || 2148 softdep_move_dependencies(bp, newbp) == 0) 2149 bundirty(bp); 2150 #else 2151 bundirty(bp); 2152 #endif 2153 2154 /* 2155 * Initiate write on the copy, release the original. The 2156 * BKGRDINPROG flag prevents it from going away until 2157 * the background write completes. 2158 */ 2159 bqrelse(bp); 2160 bp = newbp; 2161 } else 2162 /* Mark the buffer clean */ 2163 bundirty(bp); 2164 2165 2166 /* Let the normal bufwrite do the rest for us */ 2167 normal_write: 2168 return (bufwrite(bp)); 2169 } 2170 2171 2172 static void 2173 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2174 { 2175 struct vnode *vp; 2176 int error; 2177 struct buf *tbp; 2178 int nocopy; 2179 2180 vp = bo->__bo_vnode; 2181 if (bp->b_iocmd == BIO_WRITE) { 2182 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2183 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2184 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2185 panic("ffs_geom_strategy: bad I/O"); 2186 nocopy = bp->b_flags & B_NOCOPY; 2187 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2188 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2189 vp->v_rdev->si_snapdata != NULL) { 2190 if ((bp->b_flags & B_CLUSTER) != 0) { 2191 runningbufwakeup(bp); 2192 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2193 b_cluster.cluster_entry) { 2194 error = ffs_copyonwrite(vp, tbp); 2195 if (error != 0 && 2196 error != EOPNOTSUPP) { 2197 bp->b_error = error; 2198 bp->b_ioflags |= BIO_ERROR; 2199 bufdone(bp); 2200 return; 2201 } 2202 } 2203 bp->b_runningbufspace = bp->b_bufsize; 2204 atomic_add_long(&runningbufspace, 2205 bp->b_runningbufspace); 2206 } else { 2207 error = ffs_copyonwrite(vp, bp); 2208 if (error != 0 && error != EOPNOTSUPP) { 2209 bp->b_error = error; 2210 bp->b_ioflags |= BIO_ERROR; 2211 bufdone(bp); 2212 return; 2213 } 2214 } 2215 } 2216 #ifdef SOFTUPDATES 2217 if ((bp->b_flags & B_CLUSTER) != 0) { 2218 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2219 b_cluster.cluster_entry) { 2220 if (!LIST_EMPTY(&tbp->b_dep)) 2221 buf_start(tbp); 2222 } 2223 } else { 2224 if (!LIST_EMPTY(&bp->b_dep)) 2225 buf_start(bp); 2226 } 2227 2228 #endif 2229 } 2230 g_vfs_strategy(bo, bp); 2231 } 2232 2233 int 2234 ffs_own_mount(const struct mount *mp) 2235 { 2236 2237 if (mp->mnt_op == &ufs_vfsops) 2238 return (1); 2239 return (0); 2240 } 2241 2242 #ifdef DDB 2243 #ifdef SOFTUPDATES 2244 2245 /* defined in ffs_softdep.c */ 2246 extern void db_print_ffs(struct ufsmount *ump); 2247 2248 DB_SHOW_COMMAND(ffs, db_show_ffs) 2249 { 2250 struct mount *mp; 2251 struct ufsmount *ump; 2252 2253 if (have_addr) { 2254 ump = VFSTOUFS((struct mount *)addr); 2255 db_print_ffs(ump); 2256 return; 2257 } 2258 2259 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2260 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2261 db_print_ffs(VFSTOUFS(mp)); 2262 } 2263 } 2264 2265 #endif /* SOFTUPDATES */ 2266 #endif /* DDB */ 2267