1 /*- 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_quota.h" 36 #include "opt_ufs.h" 37 #include "opt_ffs.h" 38 #include "opt_ddb.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/conf.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/mutex.h> 54 55 #include <security/mac/mac_framework.h> 56 57 #include <ufs/ufs/extattr.h> 58 #include <ufs/ufs/gjournal.h> 59 #include <ufs/ufs/quota.h> 60 #include <ufs/ufs/ufsmount.h> 61 #include <ufs/ufs/inode.h> 62 #include <ufs/ufs/ufs_extern.h> 63 64 #include <ufs/ffs/fs.h> 65 #include <ufs/ffs/ffs_extern.h> 66 67 #include <vm/vm.h> 68 #include <vm/uma.h> 69 #include <vm/vm_page.h> 70 71 #include <geom/geom.h> 72 #include <geom/geom_vfs.h> 73 74 #include <ddb/ddb.h> 75 76 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 77 78 static int ffs_reload(struct mount *, struct thread *); 79 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 80 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 81 ufs2_daddr_t); 82 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 83 static vfs_init_t ffs_init; 84 static vfs_uninit_t ffs_uninit; 85 static vfs_extattrctl_t ffs_extattrctl; 86 static vfs_cmount_t ffs_cmount; 87 static vfs_unmount_t ffs_unmount; 88 static vfs_mount_t ffs_mount; 89 static vfs_statfs_t ffs_statfs; 90 static vfs_fhtovp_t ffs_fhtovp; 91 static vfs_sync_t ffs_sync; 92 93 static struct vfsops ufs_vfsops = { 94 .vfs_extattrctl = ffs_extattrctl, 95 .vfs_fhtovp = ffs_fhtovp, 96 .vfs_init = ffs_init, 97 .vfs_mount = ffs_mount, 98 .vfs_cmount = ffs_cmount, 99 .vfs_quotactl = ufs_quotactl, 100 .vfs_root = ufs_root, 101 .vfs_statfs = ffs_statfs, 102 .vfs_sync = ffs_sync, 103 .vfs_uninit = ffs_uninit, 104 .vfs_unmount = ffs_unmount, 105 .vfs_vget = ffs_vget, 106 .vfs_susp_clean = process_deferred_inactive, 107 }; 108 109 VFS_SET(ufs_vfsops, ufs, 0); 110 MODULE_VERSION(ufs, 1); 111 112 static b_strategy_t ffs_geom_strategy; 113 static b_write_t ffs_bufwrite; 114 115 static struct buf_ops ffs_ops = { 116 .bop_name = "FFS", 117 .bop_write = ffs_bufwrite, 118 .bop_strategy = ffs_geom_strategy, 119 .bop_sync = bufsync, 120 #ifdef NO_FFS_SNAPSHOT 121 .bop_bdflush = bufbdflush, 122 #else 123 .bop_bdflush = ffs_bdflush, 124 #endif 125 }; 126 127 /* 128 * Note that userquota and groupquota options are not currently used 129 * by UFS/FFS code and generally mount(8) does not pass those options 130 * from userland, but they can be passed by loader(8) via 131 * vfs.root.mountfrom.options. 132 */ 133 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 134 "noclusterw", "noexec", "export", "force", "from", "groupquota", 135 "multilabel", "nfsv4acls", "fsckpid", "snapshot", "nosuid", "suiddir", 136 "nosymfollow", "sync", "union", "userquota", NULL }; 137 138 static int 139 ffs_mount(struct mount *mp) 140 { 141 struct vnode *devvp; 142 struct thread *td; 143 struct ufsmount *ump = 0; 144 struct fs *fs; 145 pid_t fsckpid = 0; 146 int error, flags; 147 u_int mntorflags; 148 accmode_t accmode; 149 struct nameidata ndp; 150 char *fspec; 151 152 td = curthread; 153 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 154 return (EINVAL); 155 if (uma_inode == NULL) { 156 uma_inode = uma_zcreate("FFS inode", 157 sizeof(struct inode), NULL, NULL, NULL, NULL, 158 UMA_ALIGN_PTR, 0); 159 uma_ufs1 = uma_zcreate("FFS1 dinode", 160 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 161 UMA_ALIGN_PTR, 0); 162 uma_ufs2 = uma_zcreate("FFS2 dinode", 163 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 164 UMA_ALIGN_PTR, 0); 165 } 166 167 vfs_deleteopt(mp->mnt_optnew, "groupquota"); 168 vfs_deleteopt(mp->mnt_optnew, "userquota"); 169 170 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 171 if (error) 172 return (error); 173 174 mntorflags = 0; 175 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 176 mntorflags |= MNT_ACLS; 177 178 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 179 mntorflags |= MNT_SNAPSHOT; 180 /* 181 * Once we have set the MNT_SNAPSHOT flag, do not 182 * persist "snapshot" in the options list. 183 */ 184 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 185 vfs_deleteopt(mp->mnt_opt, "snapshot"); 186 } 187 188 if (vfs_getopt(mp->mnt_optnew, "fsckpid", NULL, NULL) == 0 && 189 vfs_scanopt(mp->mnt_optnew, "fsckpid", "%d", &fsckpid) == 1) { 190 /* 191 * Once we have set the restricted PID, do not 192 * persist "fsckpid" in the options list. 193 */ 194 vfs_deleteopt(mp->mnt_optnew, "fsckpid"); 195 vfs_deleteopt(mp->mnt_opt, "fsckpid"); 196 if (mp->mnt_flag & MNT_UPDATE) { 197 if (VFSTOUFS(mp)->um_fs->fs_ronly == 0 && 198 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 199 printf("Checker enable: Must be read-only\n"); 200 return (EINVAL); 201 } 202 } else if (vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 203 printf("Checker enable: Must be read-only\n"); 204 return (EINVAL); 205 } 206 /* Set to -1 if we are done */ 207 if (fsckpid == 0) 208 fsckpid = -1; 209 } 210 211 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { 212 if (mntorflags & MNT_ACLS) { 213 printf("WARNING: \"acls\" and \"nfsv4acls\" " 214 "options are mutually exclusive\n"); 215 return (EINVAL); 216 } 217 mntorflags |= MNT_NFS4ACLS; 218 } 219 220 MNT_ILOCK(mp); 221 mp->mnt_flag |= mntorflags; 222 MNT_IUNLOCK(mp); 223 /* 224 * If updating, check whether changing from read-only to 225 * read/write; if there is no device name, that's all we do. 226 */ 227 if (mp->mnt_flag & MNT_UPDATE) { 228 ump = VFSTOUFS(mp); 229 fs = ump->um_fs; 230 devvp = ump->um_devvp; 231 if (fsckpid == -1 && ump->um_fsckpid > 0) { 232 if ((error = ffs_flushfiles(mp, WRITECLOSE, td)) != 0 || 233 (error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) 234 return (error); 235 DROP_GIANT(); 236 g_topology_lock(); 237 /* 238 * Return to normal read-only mode. 239 */ 240 error = g_access(ump->um_cp, 0, -1, 0); 241 g_topology_unlock(); 242 PICKUP_GIANT(); 243 ump->um_fsckpid = 0; 244 } 245 if (fs->fs_ronly == 0 && 246 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 247 /* 248 * Flush any dirty data and suspend filesystem. 249 */ 250 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 251 return (error); 252 for (;;) { 253 vn_finished_write(mp); 254 if ((error = vfs_write_suspend(mp)) != 0) 255 return (error); 256 MNT_ILOCK(mp); 257 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 258 /* 259 * Allow the secondary writes 260 * to proceed. 261 */ 262 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 263 MNTK_SUSPEND2); 264 wakeup(&mp->mnt_flag); 265 MNT_IUNLOCK(mp); 266 /* 267 * Allow the curthread to 268 * ignore the suspension to 269 * synchronize on-disk state. 270 */ 271 td->td_pflags |= TDP_IGNSUSP; 272 break; 273 } 274 MNT_IUNLOCK(mp); 275 vn_start_write(NULL, &mp, V_WAIT); 276 } 277 /* 278 * Check for and optionally get rid of files open 279 * for writing. 280 */ 281 flags = WRITECLOSE; 282 if (mp->mnt_flag & MNT_FORCE) 283 flags |= FORCECLOSE; 284 if (MOUNTEDSOFTDEP(mp)) { 285 error = softdep_flushfiles(mp, flags, td); 286 } else { 287 error = ffs_flushfiles(mp, flags, td); 288 } 289 if (error) { 290 vfs_write_resume(mp); 291 return (error); 292 } 293 if (fs->fs_pendingblocks != 0 || 294 fs->fs_pendinginodes != 0) { 295 printf("%s: %s: blocks %jd files %d\n", 296 fs->fs_fsmnt, "update error", 297 (intmax_t)fs->fs_pendingblocks, 298 fs->fs_pendinginodes); 299 fs->fs_pendingblocks = 0; 300 fs->fs_pendinginodes = 0; 301 } 302 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 303 fs->fs_clean = 1; 304 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 305 fs->fs_ronly = 0; 306 fs->fs_clean = 0; 307 vfs_write_resume(mp); 308 return (error); 309 } 310 if (MOUNTEDSOFTDEP(mp)) 311 softdep_unmount(mp); 312 DROP_GIANT(); 313 g_topology_lock(); 314 /* 315 * Drop our write and exclusive access. 316 */ 317 g_access(ump->um_cp, 0, -1, -1); 318 g_topology_unlock(); 319 PICKUP_GIANT(); 320 fs->fs_ronly = 1; 321 MNT_ILOCK(mp); 322 mp->mnt_flag |= MNT_RDONLY; 323 MNT_IUNLOCK(mp); 324 /* 325 * Allow the writers to note that filesystem 326 * is ro now. 327 */ 328 vfs_write_resume(mp); 329 } 330 if ((mp->mnt_flag & MNT_RELOAD) && 331 (error = ffs_reload(mp, td)) != 0) 332 return (error); 333 if (fs->fs_ronly && 334 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 335 /* 336 * If we are running a checker, do not allow upgrade. 337 */ 338 if (ump->um_fsckpid > 0) { 339 printf("Active checker, cannot rw upgrade\n"); 340 return (EINVAL); 341 } 342 /* 343 * If upgrade to read-write by non-root, then verify 344 * that user has necessary permissions on the device. 345 */ 346 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 347 error = VOP_ACCESS(devvp, VREAD | VWRITE, 348 td->td_ucred, td); 349 if (error) 350 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 351 if (error) { 352 VOP_UNLOCK(devvp, 0); 353 return (error); 354 } 355 VOP_UNLOCK(devvp, 0); 356 fs->fs_flags &= ~FS_UNCLEAN; 357 if (fs->fs_clean == 0) { 358 fs->fs_flags |= FS_UNCLEAN; 359 if ((mp->mnt_flag & MNT_FORCE) || 360 ((fs->fs_flags & 361 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 362 (fs->fs_flags & FS_DOSOFTDEP))) { 363 printf("WARNING: %s was not %s\n", 364 fs->fs_fsmnt, "properly dismounted"); 365 } else { 366 printf( 367 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 368 fs->fs_fsmnt); 369 if (fs->fs_flags & FS_SUJ) 370 printf( 371 "WARNING: Forced mount will invalidate journal contents\n"); 372 return (EPERM); 373 } 374 } 375 DROP_GIANT(); 376 g_topology_lock(); 377 /* 378 * Request exclusive write access. 379 */ 380 error = g_access(ump->um_cp, 0, 1, 1); 381 g_topology_unlock(); 382 PICKUP_GIANT(); 383 if (error) 384 return (error); 385 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 386 return (error); 387 fs->fs_ronly = 0; 388 MNT_ILOCK(mp); 389 mp->mnt_flag &= ~MNT_RDONLY; 390 MNT_IUNLOCK(mp); 391 fs->fs_mtime = time_second; 392 /* check to see if we need to start softdep */ 393 if ((fs->fs_flags & FS_DOSOFTDEP) && 394 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 395 vn_finished_write(mp); 396 return (error); 397 } 398 fs->fs_clean = 0; 399 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 400 vn_finished_write(mp); 401 return (error); 402 } 403 if (fs->fs_snapinum[0] != 0) 404 ffs_snapshot_mount(mp); 405 vn_finished_write(mp); 406 } 407 /* 408 * Soft updates is incompatible with "async", 409 * so if we are doing softupdates stop the user 410 * from setting the async flag in an update. 411 * Softdep_mount() clears it in an initial mount 412 * or ro->rw remount. 413 */ 414 if (MOUNTEDSOFTDEP(mp)) { 415 /* XXX: Reset too late ? */ 416 MNT_ILOCK(mp); 417 mp->mnt_flag &= ~MNT_ASYNC; 418 MNT_IUNLOCK(mp); 419 } 420 /* 421 * Keep MNT_ACLS flag if it is stored in superblock. 422 */ 423 if ((fs->fs_flags & FS_ACLS) != 0) { 424 /* XXX: Set too late ? */ 425 MNT_ILOCK(mp); 426 mp->mnt_flag |= MNT_ACLS; 427 MNT_IUNLOCK(mp); 428 } 429 430 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 431 /* XXX: Set too late ? */ 432 MNT_ILOCK(mp); 433 mp->mnt_flag |= MNT_NFS4ACLS; 434 MNT_IUNLOCK(mp); 435 } 436 /* 437 * If this is a request from fsck to clean up the filesystem, 438 * then allow the specified pid to proceed. 439 */ 440 if (fsckpid > 0) { 441 if (ump->um_fsckpid != 0) { 442 printf("Active checker already running on %s\n", 443 fs->fs_fsmnt); 444 return (EINVAL); 445 } 446 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 447 ("soft updates enabled on read-only file system")); 448 DROP_GIANT(); 449 g_topology_lock(); 450 /* 451 * Request write access. 452 */ 453 error = g_access(ump->um_cp, 0, 1, 0); 454 g_topology_unlock(); 455 PICKUP_GIANT(); 456 if (error) { 457 printf("Checker activation failed on %s\n", 458 fs->fs_fsmnt); 459 return (error); 460 } 461 ump->um_fsckpid = fsckpid; 462 if (fs->fs_snapinum[0] != 0) 463 ffs_snapshot_mount(mp); 464 fs->fs_mtime = time_second; 465 fs->fs_fmod = 1; 466 fs->fs_clean = 0; 467 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 468 } 469 470 /* 471 * If this is a snapshot request, take the snapshot. 472 */ 473 if (mp->mnt_flag & MNT_SNAPSHOT) 474 return (ffs_snapshot(mp, fspec)); 475 } 476 477 /* 478 * Not an update, or updating the name: look up the name 479 * and verify that it refers to a sensible disk device. 480 */ 481 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 482 if ((error = namei(&ndp)) != 0) 483 return (error); 484 NDFREE(&ndp, NDF_ONLY_PNBUF); 485 devvp = ndp.ni_vp; 486 if (!vn_isdisk(devvp, &error)) { 487 vput(devvp); 488 return (error); 489 } 490 491 /* 492 * If mount by non-root, then verify that user has necessary 493 * permissions on the device. 494 */ 495 accmode = VREAD; 496 if ((mp->mnt_flag & MNT_RDONLY) == 0) 497 accmode |= VWRITE; 498 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 499 if (error) 500 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 501 if (error) { 502 vput(devvp); 503 return (error); 504 } 505 506 if (mp->mnt_flag & MNT_UPDATE) { 507 /* 508 * Update only 509 * 510 * If it's not the same vnode, or at least the same device 511 * then it's not correct. 512 */ 513 514 if (devvp->v_rdev != ump->um_devvp->v_rdev) 515 error = EINVAL; /* needs translation */ 516 vput(devvp); 517 if (error) 518 return (error); 519 } else { 520 /* 521 * New mount 522 * 523 * We need the name for the mount point (also used for 524 * "last mounted on") copied in. If an error occurs, 525 * the mount point is discarded by the upper level code. 526 * Note that vfs_mount() populates f_mntonname for us. 527 */ 528 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 529 vrele(devvp); 530 return (error); 531 } 532 if (fsckpid > 0) { 533 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 534 ("soft updates enabled on read-only file system")); 535 ump = VFSTOUFS(mp); 536 fs = ump->um_fs; 537 DROP_GIANT(); 538 g_topology_lock(); 539 /* 540 * Request write access. 541 */ 542 error = g_access(ump->um_cp, 0, 1, 0); 543 g_topology_unlock(); 544 PICKUP_GIANT(); 545 if (error) { 546 printf("Checker activation failed on %s\n", 547 fs->fs_fsmnt); 548 } else { 549 ump->um_fsckpid = fsckpid; 550 if (fs->fs_snapinum[0] != 0) 551 ffs_snapshot_mount(mp); 552 fs->fs_mtime = time_second; 553 fs->fs_clean = 0; 554 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 555 } 556 } 557 } 558 vfs_mountedfrom(mp, fspec); 559 return (0); 560 } 561 562 /* 563 * Compatibility with old mount system call. 564 */ 565 566 static int 567 ffs_cmount(struct mntarg *ma, void *data, int flags) 568 { 569 struct ufs_args args; 570 struct export_args exp; 571 int error; 572 573 if (data == NULL) 574 return (EINVAL); 575 error = copyin(data, &args, sizeof args); 576 if (error) 577 return (error); 578 vfs_oexport_conv(&args.export, &exp); 579 580 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 581 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 582 error = kernel_mount(ma, flags); 583 584 return (error); 585 } 586 587 /* 588 * Reload all incore data for a filesystem (used after running fsck on 589 * the root filesystem and finding things to fix). The filesystem must 590 * be mounted read-only. 591 * 592 * Things to do to update the mount: 593 * 1) invalidate all cached meta-data. 594 * 2) re-read superblock from disk. 595 * 3) re-read summary information from disk. 596 * 4) invalidate all inactive vnodes. 597 * 5) invalidate all cached file data. 598 * 6) re-read inode data for all active vnodes. 599 */ 600 static int 601 ffs_reload(struct mount *mp, struct thread *td) 602 { 603 struct vnode *vp, *mvp, *devvp; 604 struct inode *ip; 605 void *space; 606 struct buf *bp; 607 struct fs *fs, *newfs; 608 struct ufsmount *ump; 609 ufs2_daddr_t sblockloc; 610 int i, blks, size, error; 611 int32_t *lp; 612 613 if ((mp->mnt_flag & MNT_RDONLY) == 0) 614 return (EINVAL); 615 ump = VFSTOUFS(mp); 616 /* 617 * Step 1: invalidate all cached meta-data. 618 */ 619 devvp = VFSTOUFS(mp)->um_devvp; 620 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 621 if (vinvalbuf(devvp, 0, 0, 0) != 0) 622 panic("ffs_reload: dirty1"); 623 VOP_UNLOCK(devvp, 0); 624 625 /* 626 * Step 2: re-read superblock from disk. 627 */ 628 fs = VFSTOUFS(mp)->um_fs; 629 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 630 NOCRED, &bp)) != 0) 631 return (error); 632 newfs = (struct fs *)bp->b_data; 633 if ((newfs->fs_magic != FS_UFS1_MAGIC && 634 newfs->fs_magic != FS_UFS2_MAGIC) || 635 newfs->fs_bsize > MAXBSIZE || 636 newfs->fs_bsize < sizeof(struct fs)) { 637 brelse(bp); 638 return (EIO); /* XXX needs translation */ 639 } 640 /* 641 * Copy pointer fields back into superblock before copying in XXX 642 * new superblock. These should really be in the ufsmount. XXX 643 * Note that important parameters (eg fs_ncg) are unchanged. 644 */ 645 newfs->fs_csp = fs->fs_csp; 646 newfs->fs_maxcluster = fs->fs_maxcluster; 647 newfs->fs_contigdirs = fs->fs_contigdirs; 648 newfs->fs_active = fs->fs_active; 649 /* The file system is still read-only. */ 650 newfs->fs_ronly = 1; 651 sblockloc = fs->fs_sblockloc; 652 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 653 brelse(bp); 654 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 655 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 656 UFS_LOCK(ump); 657 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 658 printf("%s: reload pending error: blocks %jd files %d\n", 659 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 660 fs->fs_pendinginodes); 661 fs->fs_pendingblocks = 0; 662 fs->fs_pendinginodes = 0; 663 } 664 UFS_UNLOCK(ump); 665 666 /* 667 * Step 3: re-read summary information from disk. 668 */ 669 blks = howmany(fs->fs_cssize, fs->fs_fsize); 670 space = fs->fs_csp; 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 lp = fs->fs_maxcluster; 688 for (i = 0; i < fs->fs_ncg; i++) 689 *lp++ = fs->fs_contigsumsize; 690 } 691 692 loop: 693 MNT_ILOCK(mp); 694 MNT_VNODE_FOREACH(vp, mp, mvp) { 695 VI_LOCK(vp); 696 if (vp->v_iflag & VI_DOOMED) { 697 VI_UNLOCK(vp); 698 continue; 699 } 700 MNT_IUNLOCK(mp); 701 /* 702 * Step 4: invalidate all cached file data. 703 */ 704 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 705 MNT_VNODE_FOREACH_ABORT(mp, mvp); 706 goto loop; 707 } 708 if (vinvalbuf(vp, 0, 0, 0)) 709 panic("ffs_reload: dirty2"); 710 /* 711 * Step 5: re-read inode data for all active vnodes. 712 */ 713 ip = VTOI(vp); 714 error = 715 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 716 (int)fs->fs_bsize, NOCRED, &bp); 717 if (error) { 718 VOP_UNLOCK(vp, 0); 719 vrele(vp); 720 MNT_VNODE_FOREACH_ABORT(mp, mvp); 721 return (error); 722 } 723 ffs_load_inode(bp, ip, fs, ip->i_number); 724 ip->i_effnlink = ip->i_nlink; 725 brelse(bp); 726 VOP_UNLOCK(vp, 0); 727 vrele(vp); 728 MNT_ILOCK(mp); 729 } 730 MNT_IUNLOCK(mp); 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 dev = devvp->v_rdev; 766 dev_ref(dev); 767 DROP_GIANT(); 768 g_topology_lock(); 769 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 770 g_topology_unlock(); 771 PICKUP_GIANT(); 772 VOP_UNLOCK(devvp, 0); 773 if (error) 774 goto out; 775 if (devvp->v_rdev->si_iosize_max != 0) 776 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 777 if (mp->mnt_iosize_max > MAXPHYS) 778 mp->mnt_iosize_max = MAXPHYS; 779 780 devvp->v_bufobj.bo_ops = &ffs_ops; 781 782 fs = NULL; 783 sblockloc = 0; 784 /* 785 * Try reading the superblock in each of its possible locations. 786 */ 787 for (i = 0; sblock_try[i] != -1; i++) { 788 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 789 error = EINVAL; 790 vfs_mount_error(mp, 791 "Invalid sectorsize %d for superblock size %d", 792 cp->provider->sectorsize, SBLOCKSIZE); 793 goto out; 794 } 795 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 796 cred, &bp)) != 0) 797 goto out; 798 fs = (struct fs *)bp->b_data; 799 sblockloc = sblock_try[i]; 800 if ((fs->fs_magic == FS_UFS1_MAGIC || 801 (fs->fs_magic == FS_UFS2_MAGIC && 802 (fs->fs_sblockloc == sblockloc || 803 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 804 fs->fs_bsize <= MAXBSIZE && 805 fs->fs_bsize >= sizeof(struct fs)) 806 break; 807 brelse(bp); 808 bp = NULL; 809 } 810 if (sblock_try[i] == -1) { 811 error = EINVAL; /* XXX needs translation */ 812 goto out; 813 } 814 fs->fs_fmod = 0; 815 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 816 fs->fs_flags &= ~FS_UNCLEAN; 817 if (fs->fs_clean == 0) { 818 fs->fs_flags |= FS_UNCLEAN; 819 if (ronly || (mp->mnt_flag & MNT_FORCE) || 820 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 821 (fs->fs_flags & FS_DOSOFTDEP))) { 822 printf("WARNING: %s was not properly dismounted\n", 823 fs->fs_fsmnt); 824 } else { 825 printf( 826 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 827 fs->fs_fsmnt); 828 if (fs->fs_flags & FS_SUJ) 829 printf( 830 "WARNING: Forced mount will invalidate journal contents\n"); 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("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 837 (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("%s: mount pending error: blocks %jd files %d\n", 845 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 846 fs->fs_pendinginodes); 847 fs->fs_pendingblocks = 0; 848 fs->fs_pendinginodes = 0; 849 } 850 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( 866 "WARNING: %s: GJOURNAL flag on fs 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( 873 "WARNING: %s: GJOURNAL flag on fs but no UFS_GJOURNAL support\n", 874 mp->mnt_stat.f_mntonname); 875 #endif 876 } else { 877 mp->mnt_gjprovider = NULL; 878 } 879 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 880 ump->um_cp = cp; 881 ump->um_bo = &devvp->v_bufobj; 882 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 883 if (fs->fs_magic == FS_UFS1_MAGIC) { 884 ump->um_fstype = UFS1; 885 ump->um_balloc = ffs_balloc_ufs1; 886 } else { 887 ump->um_fstype = UFS2; 888 ump->um_balloc = ffs_balloc_ufs2; 889 } 890 ump->um_blkatoff = ffs_blkatoff; 891 ump->um_truncate = ffs_truncate; 892 ump->um_update = ffs_update; 893 ump->um_valloc = ffs_valloc; 894 ump->um_vfree = ffs_vfree; 895 ump->um_ifree = ffs_ifree; 896 ump->um_rdonly = ffs_rdonly; 897 ump->um_snapgone = ffs_snapgone; 898 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 899 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 900 if (fs->fs_sbsize < SBLOCKSIZE) 901 bp->b_flags |= B_INVAL | B_NOCACHE; 902 brelse(bp); 903 bp = NULL; 904 fs = ump->um_fs; 905 ffs_oldfscompat_read(fs, ump, sblockloc); 906 fs->fs_ronly = ronly; 907 size = fs->fs_cssize; 908 blks = howmany(size, fs->fs_fsize); 909 if (fs->fs_contigsumsize > 0) 910 size += fs->fs_ncg * sizeof(int32_t); 911 size += fs->fs_ncg * sizeof(u_int8_t); 912 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 913 fs->fs_csp = space; 914 for (i = 0; i < blks; i += fs->fs_frag) { 915 size = fs->fs_bsize; 916 if (i + fs->fs_frag > blks) 917 size = (blks - i) * fs->fs_fsize; 918 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 919 cred, &bp)) != 0) { 920 free(fs->fs_csp, M_UFSMNT); 921 goto out; 922 } 923 bcopy(bp->b_data, space, (u_int)size); 924 space = (char *)space + size; 925 brelse(bp); 926 bp = NULL; 927 } 928 if (fs->fs_contigsumsize > 0) { 929 fs->fs_maxcluster = lp = space; 930 for (i = 0; i < fs->fs_ncg; i++) 931 *lp++ = fs->fs_contigsumsize; 932 space = lp; 933 } 934 size = fs->fs_ncg * sizeof(u_int8_t); 935 fs->fs_contigdirs = (u_int8_t *)space; 936 bzero(fs->fs_contigdirs, size); 937 fs->fs_active = NULL; 938 mp->mnt_data = ump; 939 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 940 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 941 nmp = NULL; 942 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 943 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 944 if (nmp) 945 vfs_rel(nmp); 946 vfs_getnewfsid(mp); 947 } 948 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 949 MNT_ILOCK(mp); 950 mp->mnt_flag |= MNT_LOCAL; 951 MNT_IUNLOCK(mp); 952 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 953 #ifdef MAC 954 MNT_ILOCK(mp); 955 mp->mnt_flag |= MNT_MULTILABEL; 956 MNT_IUNLOCK(mp); 957 #else 958 printf( 959 "WARNING: %s: multilabel flag on fs but no MAC support\n", 960 mp->mnt_stat.f_mntonname); 961 #endif 962 } 963 if ((fs->fs_flags & FS_ACLS) != 0) { 964 #ifdef UFS_ACL 965 MNT_ILOCK(mp); 966 967 if (mp->mnt_flag & MNT_NFS4ACLS) 968 printf("WARNING: ACLs flag on fs conflicts with " 969 "\"nfsv4acls\" mount option; option ignored\n"); 970 mp->mnt_flag &= ~MNT_NFS4ACLS; 971 mp->mnt_flag |= MNT_ACLS; 972 973 MNT_IUNLOCK(mp); 974 #else 975 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 976 mp->mnt_stat.f_mntonname); 977 #endif 978 } 979 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 980 #ifdef UFS_ACL 981 MNT_ILOCK(mp); 982 983 if (mp->mnt_flag & MNT_ACLS) 984 printf("WARNING: NFSv4 ACLs flag on fs conflicts with " 985 "\"acls\" mount option; option ignored\n"); 986 mp->mnt_flag &= ~MNT_ACLS; 987 mp->mnt_flag |= MNT_NFS4ACLS; 988 989 MNT_IUNLOCK(mp); 990 #else 991 printf( 992 "WARNING: %s: NFSv4 ACLs flag on fs but no ACLs support\n", 993 mp->mnt_stat.f_mntonname); 994 #endif 995 } 996 if ((fs->fs_flags & FS_TRIM) != 0) { 997 size = sizeof(int); 998 if (g_io_getattr("GEOM::candelete", cp, &size, 999 &ump->um_candelete) == 0) { 1000 if (!ump->um_candelete) 1001 printf( 1002 "WARNING: %s: TRIM flag on fs but disk does not support TRIM\n", 1003 mp->mnt_stat.f_mntonname); 1004 } else { 1005 printf( 1006 "WARNING: %s: TRIM flag on fs but cannot get whether disk supports TRIM\n", 1007 mp->mnt_stat.f_mntonname); 1008 ump->um_candelete = 0; 1009 } 1010 } 1011 1012 ump->um_mountp = mp; 1013 ump->um_dev = dev; 1014 ump->um_devvp = devvp; 1015 ump->um_nindir = fs->fs_nindir; 1016 ump->um_bptrtodb = fs->fs_fsbtodb; 1017 ump->um_seqinc = fs->fs_frag; 1018 for (i = 0; i < MAXQUOTAS; i++) 1019 ump->um_quotas[i] = NULLVP; 1020 #ifdef UFS_EXTATTR 1021 ufs_extattr_uepm_init(&ump->um_extattr); 1022 #endif 1023 /* 1024 * Set FS local "last mounted on" information (NULL pad) 1025 */ 1026 bzero(fs->fs_fsmnt, MAXMNTLEN); 1027 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1028 mp->mnt_stat.f_iosize = fs->fs_bsize; 1029 1030 if (mp->mnt_flag & MNT_ROOTFS) { 1031 /* 1032 * Root mount; update timestamp in mount structure. 1033 * this will be used by the common root mount code 1034 * to update the system clock. 1035 */ 1036 mp->mnt_time = fs->fs_time; 1037 } 1038 1039 if (ronly == 0) { 1040 fs->fs_mtime = time_second; 1041 if ((fs->fs_flags & FS_DOSOFTDEP) && 1042 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1043 free(fs->fs_csp, M_UFSMNT); 1044 ffs_flushfiles(mp, FORCECLOSE, td); 1045 goto out; 1046 } 1047 if (fs->fs_snapinum[0] != 0) 1048 ffs_snapshot_mount(mp); 1049 fs->fs_fmod = 1; 1050 fs->fs_clean = 0; 1051 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1052 } 1053 /* 1054 * Initialize filesystem stat information in mount struct. 1055 */ 1056 MNT_ILOCK(mp); 1057 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 1058 MNTK_EXTENDED_SHARED; 1059 MNT_IUNLOCK(mp); 1060 #ifdef UFS_EXTATTR 1061 #ifdef UFS_EXTATTR_AUTOSTART 1062 /* 1063 * 1064 * Auto-starting does the following: 1065 * - check for /.attribute in the fs, and extattr_start if so 1066 * - for each file in .attribute, enable that file with 1067 * an attribute of the same name. 1068 * Not clear how to report errors -- probably eat them. 1069 * This would all happen while the filesystem was busy/not 1070 * available, so would effectively be "atomic". 1071 */ 1072 (void) ufs_extattr_autostart(mp, td); 1073 #endif /* !UFS_EXTATTR_AUTOSTART */ 1074 #endif /* !UFS_EXTATTR */ 1075 return (0); 1076 out: 1077 if (bp) 1078 brelse(bp); 1079 if (cp != NULL) { 1080 DROP_GIANT(); 1081 g_topology_lock(); 1082 g_vfs_close(cp); 1083 g_topology_unlock(); 1084 PICKUP_GIANT(); 1085 } 1086 if (ump) { 1087 mtx_destroy(UFS_MTX(ump)); 1088 if (mp->mnt_gjprovider != NULL) { 1089 free(mp->mnt_gjprovider, M_UFSMNT); 1090 mp->mnt_gjprovider = NULL; 1091 } 1092 free(ump->um_fs, M_UFSMNT); 1093 free(ump, M_UFSMNT); 1094 mp->mnt_data = NULL; 1095 } 1096 dev_rel(dev); 1097 return (error); 1098 } 1099 1100 #include <sys/sysctl.h> 1101 static int bigcgs = 0; 1102 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1103 1104 /* 1105 * Sanity checks for loading old filesystem superblocks. 1106 * See ffs_oldfscompat_write below for unwound actions. 1107 * 1108 * XXX - Parts get retired eventually. 1109 * Unfortunately new bits get added. 1110 */ 1111 static void 1112 ffs_oldfscompat_read(fs, ump, sblockloc) 1113 struct fs *fs; 1114 struct ufsmount *ump; 1115 ufs2_daddr_t sblockloc; 1116 { 1117 off_t maxfilesize; 1118 1119 /* 1120 * If not yet done, update fs_flags location and value of fs_sblockloc. 1121 */ 1122 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1123 fs->fs_flags = fs->fs_old_flags; 1124 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1125 fs->fs_sblockloc = sblockloc; 1126 } 1127 /* 1128 * If not yet done, update UFS1 superblock with new wider fields. 1129 */ 1130 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1131 fs->fs_maxbsize = fs->fs_bsize; 1132 fs->fs_time = fs->fs_old_time; 1133 fs->fs_size = fs->fs_old_size; 1134 fs->fs_dsize = fs->fs_old_dsize; 1135 fs->fs_csaddr = fs->fs_old_csaddr; 1136 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1137 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1138 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1139 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1140 } 1141 if (fs->fs_magic == FS_UFS1_MAGIC && 1142 fs->fs_old_inodefmt < FS_44INODEFMT) { 1143 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1144 fs->fs_qbmask = ~fs->fs_bmask; 1145 fs->fs_qfmask = ~fs->fs_fmask; 1146 } 1147 if (fs->fs_magic == FS_UFS1_MAGIC) { 1148 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1149 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1150 if (fs->fs_maxfilesize > maxfilesize) 1151 fs->fs_maxfilesize = maxfilesize; 1152 } 1153 /* Compatibility for old filesystems */ 1154 if (fs->fs_avgfilesize <= 0) 1155 fs->fs_avgfilesize = AVFILESIZ; 1156 if (fs->fs_avgfpdir <= 0) 1157 fs->fs_avgfpdir = AFPDIR; 1158 if (bigcgs) { 1159 fs->fs_save_cgsize = fs->fs_cgsize; 1160 fs->fs_cgsize = fs->fs_bsize; 1161 } 1162 } 1163 1164 /* 1165 * Unwinding superblock updates for old filesystems. 1166 * See ffs_oldfscompat_read above for details. 1167 * 1168 * XXX - Parts get retired eventually. 1169 * Unfortunately new bits get added. 1170 */ 1171 void 1172 ffs_oldfscompat_write(fs, ump) 1173 struct fs *fs; 1174 struct ufsmount *ump; 1175 { 1176 1177 /* 1178 * Copy back UFS2 updated fields that UFS1 inspects. 1179 */ 1180 if (fs->fs_magic == FS_UFS1_MAGIC) { 1181 fs->fs_old_time = fs->fs_time; 1182 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1183 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1184 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1185 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1186 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1187 } 1188 if (bigcgs) { 1189 fs->fs_cgsize = fs->fs_save_cgsize; 1190 fs->fs_save_cgsize = 0; 1191 } 1192 } 1193 1194 /* 1195 * unmount system call 1196 */ 1197 static int 1198 ffs_unmount(mp, mntflags) 1199 struct mount *mp; 1200 int mntflags; 1201 { 1202 struct thread *td; 1203 struct ufsmount *ump = VFSTOUFS(mp); 1204 struct fs *fs; 1205 int error, flags, susp; 1206 #ifdef UFS_EXTATTR 1207 int e_restart; 1208 #endif 1209 1210 flags = 0; 1211 td = curthread; 1212 fs = ump->um_fs; 1213 if (mntflags & MNT_FORCE) { 1214 flags |= FORCECLOSE; 1215 susp = fs->fs_ronly != 0; 1216 } else 1217 susp = 0; 1218 #ifdef UFS_EXTATTR 1219 if ((error = ufs_extattr_stop(mp, td))) { 1220 if (error != EOPNOTSUPP) 1221 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 1222 error); 1223 e_restart = 0; 1224 } else { 1225 ufs_extattr_uepm_destroy(&ump->um_extattr); 1226 e_restart = 1; 1227 } 1228 #endif 1229 if (susp) { 1230 /* 1231 * dounmount already called vn_start_write(). 1232 */ 1233 for (;;) { 1234 vn_finished_write(mp); 1235 if ((error = vfs_write_suspend(mp)) != 0) 1236 return (error); 1237 MNT_ILOCK(mp); 1238 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1239 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1240 MNTK_SUSPEND2); 1241 wakeup(&mp->mnt_flag); 1242 MNT_IUNLOCK(mp); 1243 td->td_pflags |= TDP_IGNSUSP; 1244 break; 1245 } 1246 MNT_IUNLOCK(mp); 1247 vn_start_write(NULL, &mp, V_WAIT); 1248 } 1249 } 1250 if (MOUNTEDSOFTDEP(mp)) 1251 error = softdep_flushfiles(mp, flags, td); 1252 else 1253 error = ffs_flushfiles(mp, flags, td); 1254 if (error != 0 && error != ENXIO) 1255 goto fail; 1256 1257 UFS_LOCK(ump); 1258 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1259 printf("%s: unmount pending error: blocks %jd files %d\n", 1260 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1261 fs->fs_pendinginodes); 1262 fs->fs_pendingblocks = 0; 1263 fs->fs_pendinginodes = 0; 1264 } 1265 UFS_UNLOCK(ump); 1266 softdep_unmount(mp); 1267 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1268 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1269 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1270 if (error && error != ENXIO) { 1271 fs->fs_clean = 0; 1272 goto fail; 1273 } 1274 } 1275 if (susp) { 1276 vfs_write_resume(mp); 1277 vn_start_write(NULL, &mp, V_WAIT); 1278 } 1279 DROP_GIANT(); 1280 g_topology_lock(); 1281 if (ump->um_fsckpid > 0) { 1282 /* 1283 * Return to normal read-only mode. 1284 */ 1285 error = g_access(ump->um_cp, 0, -1, 0); 1286 ump->um_fsckpid = 0; 1287 } 1288 g_vfs_close(ump->um_cp); 1289 g_topology_unlock(); 1290 PICKUP_GIANT(); 1291 vrele(ump->um_devvp); 1292 dev_rel(ump->um_dev); 1293 mtx_destroy(UFS_MTX(ump)); 1294 if (mp->mnt_gjprovider != NULL) { 1295 free(mp->mnt_gjprovider, M_UFSMNT); 1296 mp->mnt_gjprovider = NULL; 1297 } 1298 free(fs->fs_csp, M_UFSMNT); 1299 free(fs, M_UFSMNT); 1300 free(ump, M_UFSMNT); 1301 mp->mnt_data = NULL; 1302 MNT_ILOCK(mp); 1303 mp->mnt_flag &= ~MNT_LOCAL; 1304 MNT_IUNLOCK(mp); 1305 return (error); 1306 1307 fail: 1308 if (susp) { 1309 vfs_write_resume(mp); 1310 vn_start_write(NULL, &mp, V_WAIT); 1311 } 1312 #ifdef UFS_EXTATTR 1313 if (e_restart) { 1314 ufs_extattr_uepm_init(&ump->um_extattr); 1315 #ifdef UFS_EXTATTR_AUTOSTART 1316 (void) ufs_extattr_autostart(mp, td); 1317 #endif 1318 } 1319 #endif 1320 1321 return (error); 1322 } 1323 1324 /* 1325 * Flush out all the files in a filesystem. 1326 */ 1327 int 1328 ffs_flushfiles(mp, flags, td) 1329 struct mount *mp; 1330 int flags; 1331 struct thread *td; 1332 { 1333 struct ufsmount *ump; 1334 int error; 1335 1336 ump = VFSTOUFS(mp); 1337 #ifdef QUOTA 1338 if (mp->mnt_flag & MNT_QUOTA) { 1339 int i; 1340 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1341 if (error) 1342 return (error); 1343 for (i = 0; i < MAXQUOTAS; i++) { 1344 quotaoff(td, mp, i); 1345 } 1346 /* 1347 * Here we fall through to vflush again to ensure 1348 * that we have gotten rid of all the system vnodes. 1349 */ 1350 } 1351 #endif 1352 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1353 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1354 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1355 return (error); 1356 ffs_snapshot_unmount(mp); 1357 flags |= FORCECLOSE; 1358 /* 1359 * Here we fall through to vflush again to ensure 1360 * that we have gotten rid of all the system vnodes. 1361 */ 1362 } 1363 /* 1364 * Flush all the files. 1365 */ 1366 if ((error = vflush(mp, 0, flags, td)) != 0) 1367 return (error); 1368 /* 1369 * Flush filesystem metadata. 1370 */ 1371 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1372 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1373 VOP_UNLOCK(ump->um_devvp, 0); 1374 return (error); 1375 } 1376 1377 /* 1378 * Get filesystem statistics. 1379 */ 1380 static int 1381 ffs_statfs(mp, sbp) 1382 struct mount *mp; 1383 struct statfs *sbp; 1384 { 1385 struct ufsmount *ump; 1386 struct fs *fs; 1387 1388 ump = VFSTOUFS(mp); 1389 fs = ump->um_fs; 1390 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1391 panic("ffs_statfs"); 1392 sbp->f_version = STATFS_VERSION; 1393 sbp->f_bsize = fs->fs_fsize; 1394 sbp->f_iosize = fs->fs_bsize; 1395 sbp->f_blocks = fs->fs_dsize; 1396 UFS_LOCK(ump); 1397 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1398 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1399 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1400 dbtofsb(fs, fs->fs_pendingblocks); 1401 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1402 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1403 UFS_UNLOCK(ump); 1404 sbp->f_namemax = NAME_MAX; 1405 return (0); 1406 } 1407 1408 /* 1409 * Go through the disk queues to initiate sandbagged IO; 1410 * go through the inodes to write those that have been modified; 1411 * initiate the writing of the super block if it has been modified. 1412 * 1413 * Note: we are always called with the filesystem marked `MPBUSY'. 1414 */ 1415 static int 1416 ffs_sync(mp, waitfor) 1417 struct mount *mp; 1418 int waitfor; 1419 { 1420 struct vnode *mvp, *vp, *devvp; 1421 struct thread *td; 1422 struct inode *ip; 1423 struct ufsmount *ump = VFSTOUFS(mp); 1424 struct fs *fs; 1425 int error, count, wait, lockreq, allerror = 0; 1426 int suspend; 1427 int suspended; 1428 int secondary_writes; 1429 int secondary_accwrites; 1430 int softdep_deps; 1431 int softdep_accdeps; 1432 struct bufobj *bo; 1433 1434 td = curthread; 1435 fs = ump->um_fs; 1436 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) { 1437 printf("fs = %s\n", fs->fs_fsmnt); 1438 panic("ffs_sync: rofs mod"); 1439 } 1440 /* 1441 * Write back each (modified) inode. 1442 */ 1443 wait = 0; 1444 suspend = 0; 1445 suspended = 0; 1446 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1447 if (waitfor == MNT_SUSPEND) { 1448 suspend = 1; 1449 waitfor = MNT_WAIT; 1450 } 1451 if (waitfor == MNT_WAIT) { 1452 wait = 1; 1453 lockreq = LK_EXCLUSIVE; 1454 } 1455 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1456 MNT_ILOCK(mp); 1457 loop: 1458 /* Grab snapshot of secondary write counts */ 1459 secondary_writes = mp->mnt_secondary_writes; 1460 secondary_accwrites = mp->mnt_secondary_accwrites; 1461 1462 /* Grab snapshot of softdep dependency counts */ 1463 MNT_IUNLOCK(mp); 1464 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1465 MNT_ILOCK(mp); 1466 1467 MNT_VNODE_FOREACH(vp, mp, mvp) { 1468 /* 1469 * Depend on the mntvnode_slock to keep things stable enough 1470 * for a quick test. Since there might be hundreds of 1471 * thousands of vnodes, we cannot afford even a subroutine 1472 * call unless there's a good chance that we have work to do. 1473 */ 1474 VI_LOCK(vp); 1475 if (vp->v_iflag & VI_DOOMED) { 1476 VI_UNLOCK(vp); 1477 continue; 1478 } 1479 ip = VTOI(vp); 1480 if (vp->v_type == VNON || ((ip->i_flag & 1481 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1482 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1483 VI_UNLOCK(vp); 1484 continue; 1485 } 1486 MNT_IUNLOCK(mp); 1487 if ((error = vget(vp, lockreq, td)) != 0) { 1488 MNT_ILOCK(mp); 1489 if (error == ENOENT || error == ENOLCK) { 1490 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1491 goto loop; 1492 } 1493 continue; 1494 } 1495 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1496 allerror = error; 1497 vput(vp); 1498 MNT_ILOCK(mp); 1499 } 1500 MNT_IUNLOCK(mp); 1501 /* 1502 * Force stale filesystem control information to be flushed. 1503 */ 1504 if (waitfor == MNT_WAIT) { 1505 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1506 allerror = error; 1507 /* Flushed work items may create new vnodes to clean */ 1508 if (allerror == 0 && count) { 1509 MNT_ILOCK(mp); 1510 goto loop; 1511 } 1512 } 1513 #ifdef QUOTA 1514 qsync(mp); 1515 #endif 1516 devvp = ump->um_devvp; 1517 bo = &devvp->v_bufobj; 1518 BO_LOCK(bo); 1519 if (waitfor != MNT_LAZY && 1520 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1521 BO_UNLOCK(bo); 1522 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1523 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1524 allerror = error; 1525 VOP_UNLOCK(devvp, 0); 1526 if (allerror == 0 && waitfor == MNT_WAIT) { 1527 MNT_ILOCK(mp); 1528 goto loop; 1529 } 1530 } else if (suspend != 0) { 1531 if (softdep_check_suspend(mp, 1532 devvp, 1533 softdep_deps, 1534 softdep_accdeps, 1535 secondary_writes, 1536 secondary_accwrites) != 0) 1537 goto loop; /* More work needed */ 1538 mtx_assert(MNT_MTX(mp), MA_OWNED); 1539 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1540 MNT_IUNLOCK(mp); 1541 suspended = 1; 1542 } else 1543 BO_UNLOCK(bo); 1544 /* 1545 * Write back modified superblock. 1546 */ 1547 if (fs->fs_fmod != 0 && 1548 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1549 allerror = error; 1550 return (allerror); 1551 } 1552 1553 int 1554 ffs_vget(mp, ino, flags, vpp) 1555 struct mount *mp; 1556 ino_t ino; 1557 int flags; 1558 struct vnode **vpp; 1559 { 1560 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1561 } 1562 1563 int 1564 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1565 struct mount *mp; 1566 ino_t ino; 1567 int flags; 1568 struct vnode **vpp; 1569 int ffs_flags; 1570 { 1571 struct fs *fs; 1572 struct inode *ip; 1573 struct ufsmount *ump; 1574 struct buf *bp; 1575 struct vnode *vp; 1576 struct cdev *dev; 1577 int error; 1578 1579 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1580 if (error || *vpp != NULL) 1581 return (error); 1582 1583 /* 1584 * We must promote to an exclusive lock for vnode creation. This 1585 * can happen if lookup is passed LOCKSHARED. 1586 */ 1587 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1588 flags &= ~LK_TYPE_MASK; 1589 flags |= LK_EXCLUSIVE; 1590 } 1591 1592 /* 1593 * We do not lock vnode creation as it is believed to be too 1594 * expensive for such rare case as simultaneous creation of vnode 1595 * for same ino by different processes. We just allow them to race 1596 * and check later to decide who wins. Let the race begin! 1597 */ 1598 1599 ump = VFSTOUFS(mp); 1600 dev = ump->um_dev; 1601 fs = ump->um_fs; 1602 1603 /* 1604 * If this malloc() is performed after the getnewvnode() 1605 * it might block, leaving a vnode with a NULL v_data to be 1606 * found by ffs_sync() if a sync happens to fire right then, 1607 * which will cause a panic because ffs_sync() blindly 1608 * dereferences vp->v_data (as well it should). 1609 */ 1610 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1611 1612 /* Allocate a new vnode/inode. */ 1613 if (fs->fs_magic == FS_UFS1_MAGIC) 1614 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1615 else 1616 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1617 if (error) { 1618 *vpp = NULL; 1619 uma_zfree(uma_inode, ip); 1620 return (error); 1621 } 1622 /* 1623 * FFS supports recursive locking. 1624 */ 1625 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1626 VN_LOCK_AREC(vp); 1627 vp->v_data = ip; 1628 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1629 ip->i_vnode = vp; 1630 ip->i_ump = ump; 1631 ip->i_fs = fs; 1632 ip->i_dev = dev; 1633 ip->i_number = ino; 1634 ip->i_ea_refs = 0; 1635 #ifdef QUOTA 1636 { 1637 int i; 1638 for (i = 0; i < MAXQUOTAS; i++) 1639 ip->i_dquot[i] = NODQUOT; 1640 } 1641 #endif 1642 1643 if (ffs_flags & FFSV_FORCEINSMQ) 1644 vp->v_vflag |= VV_FORCEINSMQ; 1645 error = insmntque(vp, mp); 1646 if (error != 0) { 1647 uma_zfree(uma_inode, ip); 1648 *vpp = NULL; 1649 return (error); 1650 } 1651 vp->v_vflag &= ~VV_FORCEINSMQ; 1652 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1653 if (error || *vpp != NULL) 1654 return (error); 1655 1656 /* Read in the disk contents for the inode, copy into the inode. */ 1657 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1658 (int)fs->fs_bsize, NOCRED, &bp); 1659 if (error) { 1660 /* 1661 * The inode does not contain anything useful, so it would 1662 * be misleading to leave it on its hash chain. With mode 1663 * still zero, it will be unlinked and returned to the free 1664 * list by vput(). 1665 */ 1666 brelse(bp); 1667 vput(vp); 1668 *vpp = NULL; 1669 return (error); 1670 } 1671 if (ip->i_ump->um_fstype == UFS1) 1672 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1673 else 1674 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1675 ffs_load_inode(bp, ip, fs, ino); 1676 if (DOINGSOFTDEP(vp)) 1677 softdep_load_inodeblock(ip); 1678 else 1679 ip->i_effnlink = ip->i_nlink; 1680 bqrelse(bp); 1681 1682 /* 1683 * Initialize the vnode from the inode, check for aliases. 1684 * Note that the underlying vnode may have changed. 1685 */ 1686 if (ip->i_ump->um_fstype == UFS1) 1687 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1688 else 1689 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1690 if (error) { 1691 vput(vp); 1692 *vpp = NULL; 1693 return (error); 1694 } 1695 1696 /* 1697 * Finish inode initialization. 1698 */ 1699 if (vp->v_type != VFIFO) { 1700 /* FFS supports shared locking for all files except fifos. */ 1701 VN_LOCK_ASHARE(vp); 1702 } 1703 1704 /* 1705 * Set up a generation number for this inode if it does not 1706 * already have one. This should only happen on old filesystems. 1707 */ 1708 if (ip->i_gen == 0) { 1709 ip->i_gen = arc4random() / 2 + 1; 1710 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1711 ip->i_flag |= IN_MODIFIED; 1712 DIP_SET(ip, i_gen, ip->i_gen); 1713 } 1714 } 1715 #ifdef MAC 1716 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1717 /* 1718 * If this vnode is already allocated, and we're running 1719 * multi-label, attempt to perform a label association 1720 * from the extended attributes on the inode. 1721 */ 1722 error = mac_vnode_associate_extattr(mp, vp); 1723 if (error) { 1724 /* ufs_inactive will release ip->i_devvp ref. */ 1725 vput(vp); 1726 *vpp = NULL; 1727 return (error); 1728 } 1729 } 1730 #endif 1731 1732 *vpp = vp; 1733 return (0); 1734 } 1735 1736 /* 1737 * File handle to vnode 1738 * 1739 * Have to be really careful about stale file handles: 1740 * - check that the inode number is valid 1741 * - call ffs_vget() to get the locked inode 1742 * - check for an unallocated inode (i_mode == 0) 1743 * - check that the given client host has export rights and return 1744 * those rights via. exflagsp and credanonp 1745 */ 1746 static int 1747 ffs_fhtovp(mp, fhp, flags, vpp) 1748 struct mount *mp; 1749 struct fid *fhp; 1750 int flags; 1751 struct vnode **vpp; 1752 { 1753 struct ufid *ufhp; 1754 struct fs *fs; 1755 1756 ufhp = (struct ufid *)fhp; 1757 fs = VFSTOUFS(mp)->um_fs; 1758 if (ufhp->ufid_ino < ROOTINO || 1759 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1760 return (ESTALE); 1761 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1762 } 1763 1764 /* 1765 * Initialize the filesystem. 1766 */ 1767 static int 1768 ffs_init(vfsp) 1769 struct vfsconf *vfsp; 1770 { 1771 1772 softdep_initialize(); 1773 return (ufs_init(vfsp)); 1774 } 1775 1776 /* 1777 * Undo the work of ffs_init(). 1778 */ 1779 static int 1780 ffs_uninit(vfsp) 1781 struct vfsconf *vfsp; 1782 { 1783 int ret; 1784 1785 ret = ufs_uninit(vfsp); 1786 softdep_uninitialize(); 1787 return (ret); 1788 } 1789 1790 /* 1791 * Write a superblock and associated information back to disk. 1792 */ 1793 int 1794 ffs_sbupdate(ump, waitfor, suspended) 1795 struct ufsmount *ump; 1796 int waitfor; 1797 int suspended; 1798 { 1799 struct fs *fs = ump->um_fs; 1800 struct buf *sbbp; 1801 struct buf *bp; 1802 int blks; 1803 void *space; 1804 int i, size, error, allerror = 0; 1805 1806 if (fs->fs_ronly == 1 && 1807 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1808 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1809 panic("ffs_sbupdate: write read-only filesystem"); 1810 /* 1811 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1812 */ 1813 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1814 (int)fs->fs_sbsize, 0, 0, 0); 1815 /* 1816 * First write back the summary information. 1817 */ 1818 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1819 space = fs->fs_csp; 1820 for (i = 0; i < blks; i += fs->fs_frag) { 1821 size = fs->fs_bsize; 1822 if (i + fs->fs_frag > blks) 1823 size = (blks - i) * fs->fs_fsize; 1824 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1825 size, 0, 0, 0); 1826 bcopy(space, bp->b_data, (u_int)size); 1827 space = (char *)space + size; 1828 if (suspended) 1829 bp->b_flags |= B_VALIDSUSPWRT; 1830 if (waitfor != MNT_WAIT) 1831 bawrite(bp); 1832 else if ((error = bwrite(bp)) != 0) 1833 allerror = error; 1834 } 1835 /* 1836 * Now write back the superblock itself. If any errors occurred 1837 * up to this point, then fail so that the superblock avoids 1838 * being written out as clean. 1839 */ 1840 if (allerror) { 1841 brelse(sbbp); 1842 return (allerror); 1843 } 1844 bp = sbbp; 1845 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1846 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1847 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1848 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1849 fs->fs_sblockloc = SBLOCK_UFS1; 1850 } 1851 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1852 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1853 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1854 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1855 fs->fs_sblockloc = SBLOCK_UFS2; 1856 } 1857 fs->fs_fmod = 0; 1858 fs->fs_time = time_second; 1859 if (fs->fs_flags & FS_DOSOFTDEP) 1860 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1861 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1862 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1863 if (suspended) 1864 bp->b_flags |= B_VALIDSUSPWRT; 1865 if (waitfor != MNT_WAIT) 1866 bawrite(bp); 1867 else if ((error = bwrite(bp)) != 0) 1868 allerror = error; 1869 return (allerror); 1870 } 1871 1872 static int 1873 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1874 int attrnamespace, const char *attrname) 1875 { 1876 1877 #ifdef UFS_EXTATTR 1878 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1879 attrname)); 1880 #else 1881 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1882 attrname)); 1883 #endif 1884 } 1885 1886 static void 1887 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1888 { 1889 1890 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1891 uma_zfree(uma_ufs1, ip->i_din1); 1892 else if (ip->i_din2 != NULL) 1893 uma_zfree(uma_ufs2, ip->i_din2); 1894 uma_zfree(uma_inode, ip); 1895 } 1896 1897 static int dobkgrdwrite = 1; 1898 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1899 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1900 1901 /* 1902 * Complete a background write started from bwrite. 1903 */ 1904 static void 1905 ffs_backgroundwritedone(struct buf *bp) 1906 { 1907 struct bufobj *bufobj; 1908 struct buf *origbp; 1909 1910 /* 1911 * Find the original buffer that we are writing. 1912 */ 1913 bufobj = bp->b_bufobj; 1914 BO_LOCK(bufobj); 1915 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1916 panic("backgroundwritedone: lost buffer"); 1917 /* Grab an extra reference to be dropped by the bufdone() below. */ 1918 bufobj_wrefl(bufobj); 1919 BO_UNLOCK(bufobj); 1920 /* 1921 * Process dependencies then return any unfinished ones. 1922 */ 1923 if (!LIST_EMPTY(&bp->b_dep)) 1924 buf_complete(bp); 1925 #ifdef SOFTUPDATES 1926 if (!LIST_EMPTY(&bp->b_dep)) 1927 softdep_move_dependencies(bp, origbp); 1928 #endif 1929 /* 1930 * This buffer is marked B_NOCACHE so when it is released 1931 * by biodone it will be tossed. 1932 */ 1933 bp->b_flags |= B_NOCACHE; 1934 bp->b_flags &= ~B_CACHE; 1935 bufdone(bp); 1936 BO_LOCK(bufobj); 1937 /* 1938 * Clear the BV_BKGRDINPROG flag in the original buffer 1939 * and awaken it if it is waiting for the write to complete. 1940 * If BV_BKGRDINPROG is not set in the original buffer it must 1941 * have been released and re-instantiated - which is not legal. 1942 */ 1943 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1944 ("backgroundwritedone: lost buffer2")); 1945 origbp->b_vflags &= ~BV_BKGRDINPROG; 1946 if (origbp->b_vflags & BV_BKGRDWAIT) { 1947 origbp->b_vflags &= ~BV_BKGRDWAIT; 1948 wakeup(&origbp->b_xflags); 1949 } 1950 BO_UNLOCK(bufobj); 1951 } 1952 1953 1954 /* 1955 * Write, release buffer on completion. (Done by iodone 1956 * if async). Do not bother writing anything if the buffer 1957 * is invalid. 1958 * 1959 * Note that we set B_CACHE here, indicating that buffer is 1960 * fully valid and thus cacheable. This is true even of NFS 1961 * now so we set it generally. This could be set either here 1962 * or in biodone() since the I/O is synchronous. We put it 1963 * here. 1964 */ 1965 static int 1966 ffs_bufwrite(struct buf *bp) 1967 { 1968 int oldflags, s; 1969 struct buf *newbp; 1970 1971 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1972 if (bp->b_flags & B_INVAL) { 1973 brelse(bp); 1974 return (0); 1975 } 1976 1977 oldflags = bp->b_flags; 1978 1979 if (!BUF_ISLOCKED(bp)) 1980 panic("bufwrite: buffer is not busy???"); 1981 s = splbio(); 1982 /* 1983 * If a background write is already in progress, delay 1984 * writing this block if it is asynchronous. Otherwise 1985 * wait for the background write to complete. 1986 */ 1987 BO_LOCK(bp->b_bufobj); 1988 if (bp->b_vflags & BV_BKGRDINPROG) { 1989 if (bp->b_flags & B_ASYNC) { 1990 BO_UNLOCK(bp->b_bufobj); 1991 splx(s); 1992 bdwrite(bp); 1993 return (0); 1994 } 1995 bp->b_vflags |= BV_BKGRDWAIT; 1996 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1997 if (bp->b_vflags & BV_BKGRDINPROG) 1998 panic("bufwrite: still writing"); 1999 } 2000 BO_UNLOCK(bp->b_bufobj); 2001 2002 /* 2003 * If this buffer is marked for background writing and we 2004 * do not have to wait for it, make a copy and write the 2005 * copy so as to leave this buffer ready for further use. 2006 * 2007 * This optimization eats a lot of memory. If we have a page 2008 * or buffer shortfall we can't do it. 2009 */ 2010 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2011 (bp->b_flags & B_ASYNC) && 2012 !vm_page_count_severe() && 2013 !buf_dirty_count_severe()) { 2014 KASSERT(bp->b_iodone == NULL, 2015 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2016 2017 /* get a new block */ 2018 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2019 if (newbp == NULL) 2020 goto normal_write; 2021 2022 /* 2023 * set it to be identical to the old block. We have to 2024 * set b_lblkno and BKGRDMARKER before calling bgetvp() 2025 * to avoid confusing the splay tree and gbincore(). 2026 */ 2027 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2028 newbp->b_lblkno = bp->b_lblkno; 2029 newbp->b_xflags |= BX_BKGRDMARKER; 2030 BO_LOCK(bp->b_bufobj); 2031 bp->b_vflags |= BV_BKGRDINPROG; 2032 bgetvp(bp->b_vp, newbp); 2033 BO_UNLOCK(bp->b_bufobj); 2034 newbp->b_bufobj = &bp->b_vp->v_bufobj; 2035 newbp->b_blkno = bp->b_blkno; 2036 newbp->b_offset = bp->b_offset; 2037 newbp->b_iodone = ffs_backgroundwritedone; 2038 newbp->b_flags |= B_ASYNC; 2039 newbp->b_flags &= ~B_INVAL; 2040 2041 #ifdef SOFTUPDATES 2042 /* 2043 * Move over the dependencies. If there are rollbacks, 2044 * leave the parent buffer dirtied as it will need to 2045 * be written again. 2046 */ 2047 if (LIST_EMPTY(&bp->b_dep) || 2048 softdep_move_dependencies(bp, newbp) == 0) 2049 bundirty(bp); 2050 #else 2051 bundirty(bp); 2052 #endif 2053 2054 /* 2055 * Initiate write on the copy, release the original to 2056 * the B_LOCKED queue so that it cannot go away until 2057 * the background write completes. If not locked it could go 2058 * away and then be reconstituted while it was being written. 2059 * If the reconstituted buffer were written, we could end up 2060 * with two background copies being written at the same time. 2061 */ 2062 bqrelse(bp); 2063 bp = newbp; 2064 } else 2065 /* Mark the buffer clean */ 2066 bundirty(bp); 2067 2068 2069 /* Let the normal bufwrite do the rest for us */ 2070 normal_write: 2071 return (bufwrite(bp)); 2072 } 2073 2074 2075 static void 2076 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2077 { 2078 struct vnode *vp; 2079 int error; 2080 struct buf *tbp; 2081 int nocopy; 2082 2083 vp = bo->__bo_vnode; 2084 if (bp->b_iocmd == BIO_WRITE) { 2085 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2086 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2087 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2088 panic("ffs_geom_strategy: bad I/O"); 2089 nocopy = bp->b_flags & B_NOCOPY; 2090 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2091 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2092 vp->v_rdev->si_snapdata != NULL) { 2093 if ((bp->b_flags & B_CLUSTER) != 0) { 2094 runningbufwakeup(bp); 2095 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2096 b_cluster.cluster_entry) { 2097 error = ffs_copyonwrite(vp, tbp); 2098 if (error != 0 && 2099 error != EOPNOTSUPP) { 2100 bp->b_error = error; 2101 bp->b_ioflags |= BIO_ERROR; 2102 bufdone(bp); 2103 return; 2104 } 2105 } 2106 bp->b_runningbufspace = bp->b_bufsize; 2107 atomic_add_long(&runningbufspace, 2108 bp->b_runningbufspace); 2109 } else { 2110 error = ffs_copyonwrite(vp, bp); 2111 if (error != 0 && error != EOPNOTSUPP) { 2112 bp->b_error = error; 2113 bp->b_ioflags |= BIO_ERROR; 2114 bufdone(bp); 2115 return; 2116 } 2117 } 2118 } 2119 #ifdef SOFTUPDATES 2120 if ((bp->b_flags & B_CLUSTER) != 0) { 2121 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2122 b_cluster.cluster_entry) { 2123 if (!LIST_EMPTY(&tbp->b_dep)) 2124 buf_start(tbp); 2125 } 2126 } else { 2127 if (!LIST_EMPTY(&bp->b_dep)) 2128 buf_start(bp); 2129 } 2130 2131 #endif 2132 } 2133 g_vfs_strategy(bo, bp); 2134 } 2135 2136 #ifdef DDB 2137 2138 static void 2139 db_print_ffs(struct ufsmount *ump) 2140 { 2141 db_printf("mp %p %s devvp %p fs %p su_wl %d su_deps %d su_req %d\n", 2142 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 2143 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 2144 ump->softdep_deps, ump->softdep_req); 2145 } 2146 2147 DB_SHOW_COMMAND(ffs, db_show_ffs) 2148 { 2149 struct mount *mp; 2150 struct ufsmount *ump; 2151 2152 if (have_addr) { 2153 ump = VFSTOUFS((struct mount *)addr); 2154 db_print_ffs(ump); 2155 return; 2156 } 2157 2158 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2159 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2160 db_print_ffs(VFSTOUFS(mp)); 2161 } 2162 } 2163 2164 #endif /* DDB */ 2165