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_mac.h" 36 #include "opt_quota.h" 37 #include "opt_ufs.h" 38 #include "opt_ffs.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 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 75 76 static int ffs_reload(struct mount *, struct thread *); 77 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 78 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 79 ufs2_daddr_t); 80 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 81 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 82 static vfs_init_t ffs_init; 83 static vfs_uninit_t ffs_uninit; 84 static vfs_extattrctl_t ffs_extattrctl; 85 static vfs_cmount_t ffs_cmount; 86 static vfs_unmount_t ffs_unmount; 87 static vfs_mount_t ffs_mount; 88 static vfs_statfs_t ffs_statfs; 89 static vfs_fhtovp_t ffs_fhtovp; 90 static vfs_sync_t ffs_sync; 91 92 static struct vfsops ufs_vfsops = { 93 .vfs_extattrctl = ffs_extattrctl, 94 .vfs_fhtovp = ffs_fhtovp, 95 .vfs_init = ffs_init, 96 .vfs_mount = ffs_mount, 97 .vfs_cmount = ffs_cmount, 98 .vfs_quotactl = ufs_quotactl, 99 .vfs_root = ufs_root, 100 .vfs_statfs = ffs_statfs, 101 .vfs_sync = ffs_sync, 102 .vfs_uninit = ffs_uninit, 103 .vfs_unmount = ffs_unmount, 104 .vfs_vget = ffs_vget, 105 }; 106 107 VFS_SET(ufs_vfsops, ufs, 0); 108 MODULE_VERSION(ufs, 1); 109 110 static b_strategy_t ffs_geom_strategy; 111 static b_write_t ffs_bufwrite; 112 113 static struct buf_ops ffs_ops = { 114 .bop_name = "FFS", 115 .bop_write = ffs_bufwrite, 116 .bop_strategy = ffs_geom_strategy, 117 .bop_sync = bufsync, 118 #ifdef NO_FFS_SNAPSHOT 119 .bop_bdflush = bufbdflush, 120 #else 121 .bop_bdflush = ffs_bdflush, 122 #endif 123 }; 124 125 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 126 "noclusterw", "noexec", "export", "force", "from", "multilabel", 127 "snapshot", "nosuid", "suiddir", "nosymfollow", "sync", 128 "union", NULL }; 129 130 static int 131 ffs_mount(struct mount *mp, struct thread *td) 132 { 133 struct vnode *devvp; 134 struct ufsmount *ump = 0; 135 struct fs *fs; 136 int error, flags; 137 u_int mntorflags, mntandnotflags; 138 mode_t accessmode; 139 struct nameidata ndp; 140 char *fspec; 141 142 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 143 return (EINVAL); 144 if (uma_inode == NULL) { 145 uma_inode = uma_zcreate("FFS inode", 146 sizeof(struct inode), NULL, NULL, NULL, NULL, 147 UMA_ALIGN_PTR, 0); 148 uma_ufs1 = uma_zcreate("FFS1 dinode", 149 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 150 UMA_ALIGN_PTR, 0); 151 uma_ufs2 = uma_zcreate("FFS2 dinode", 152 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 153 UMA_ALIGN_PTR, 0); 154 } 155 156 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 157 if (error) 158 return (error); 159 160 mntorflags = 0; 161 mntandnotflags = 0; 162 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 163 mntorflags |= MNT_ACLS; 164 165 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 166 mntorflags |= MNT_SNAPSHOT; 167 /* 168 * Once we have set the MNT_SNAPSHOT flag, do not 169 * persist "snapshot" in the options list. 170 */ 171 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 172 vfs_deleteopt(mp->mnt_opt, "snapshot"); 173 } 174 175 MNT_ILOCK(mp); 176 mp->mnt_flag = (mp->mnt_flag | mntorflags) & ~mntandnotflags; 177 MNT_IUNLOCK(mp); 178 /* 179 * If updating, check whether changing from read-only to 180 * read/write; if there is no device name, that's all we do. 181 */ 182 if (mp->mnt_flag & MNT_UPDATE) { 183 ump = VFSTOUFS(mp); 184 fs = ump->um_fs; 185 devvp = ump->um_devvp; 186 if (fs->fs_ronly == 0 && 187 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 188 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 189 return (error); 190 /* 191 * Flush any dirty data. 192 */ 193 if ((error = ffs_sync(mp, MNT_WAIT, td)) != 0) { 194 vn_finished_write(mp); 195 return (error); 196 } 197 /* 198 * Check for and optionally get rid of files open 199 * for writing. 200 */ 201 flags = WRITECLOSE; 202 if (mp->mnt_flag & MNT_FORCE) 203 flags |= FORCECLOSE; 204 if (mp->mnt_flag & MNT_SOFTDEP) { 205 error = softdep_flushfiles(mp, flags, td); 206 } else { 207 error = ffs_flushfiles(mp, flags, td); 208 } 209 if (error) { 210 vn_finished_write(mp); 211 return (error); 212 } 213 if (fs->fs_pendingblocks != 0 || 214 fs->fs_pendinginodes != 0) { 215 printf("%s: %s: blocks %jd files %d\n", 216 fs->fs_fsmnt, "update error", 217 (intmax_t)fs->fs_pendingblocks, 218 fs->fs_pendinginodes); 219 fs->fs_pendingblocks = 0; 220 fs->fs_pendinginodes = 0; 221 } 222 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 223 fs->fs_clean = 1; 224 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 225 fs->fs_ronly = 0; 226 fs->fs_clean = 0; 227 vn_finished_write(mp); 228 return (error); 229 } 230 vn_finished_write(mp); 231 DROP_GIANT(); 232 g_topology_lock(); 233 g_access(ump->um_cp, 0, -1, 0); 234 g_topology_unlock(); 235 PICKUP_GIANT(); 236 fs->fs_ronly = 1; 237 MNT_ILOCK(mp); 238 mp->mnt_flag |= MNT_RDONLY; 239 MNT_IUNLOCK(mp); 240 } 241 if ((mp->mnt_flag & MNT_RELOAD) && 242 (error = ffs_reload(mp, td)) != 0) 243 return (error); 244 if (fs->fs_ronly && 245 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 246 /* 247 * If upgrade to read-write by non-root, then verify 248 * that user has necessary permissions on the device. 249 */ 250 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 251 error = VOP_ACCESS(devvp, VREAD | VWRITE, 252 td->td_ucred, td); 253 if (error) 254 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 255 if (error) { 256 VOP_UNLOCK(devvp, 0); 257 return (error); 258 } 259 VOP_UNLOCK(devvp, 0); 260 fs->fs_flags &= ~FS_UNCLEAN; 261 if (fs->fs_clean == 0) { 262 fs->fs_flags |= FS_UNCLEAN; 263 if ((mp->mnt_flag & MNT_FORCE) || 264 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 265 (fs->fs_flags & FS_DOSOFTDEP))) { 266 printf("WARNING: %s was not %s\n", 267 fs->fs_fsmnt, "properly dismounted"); 268 } else { 269 printf( 270 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 271 fs->fs_fsmnt); 272 return (EPERM); 273 } 274 } 275 DROP_GIANT(); 276 g_topology_lock(); 277 /* 278 * If we're the root device, we may not have an E count 279 * yet, get it now. 280 */ 281 if (ump->um_cp->ace == 0) 282 error = g_access(ump->um_cp, 0, 1, 1); 283 else 284 error = g_access(ump->um_cp, 0, 1, 0); 285 g_topology_unlock(); 286 PICKUP_GIANT(); 287 if (error) 288 return (error); 289 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 290 return (error); 291 fs->fs_ronly = 0; 292 MNT_ILOCK(mp); 293 mp->mnt_flag &= ~MNT_RDONLY; 294 MNT_IUNLOCK(mp); 295 fs->fs_clean = 0; 296 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 297 vn_finished_write(mp); 298 return (error); 299 } 300 /* check to see if we need to start softdep */ 301 if ((fs->fs_flags & FS_DOSOFTDEP) && 302 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 303 vn_finished_write(mp); 304 return (error); 305 } 306 if (fs->fs_snapinum[0] != 0) 307 ffs_snapshot_mount(mp); 308 vn_finished_write(mp); 309 } 310 /* 311 * Soft updates is incompatible with "async", 312 * so if we are doing softupdates stop the user 313 * from setting the async flag in an update. 314 * Softdep_mount() clears it in an initial mount 315 * or ro->rw remount. 316 */ 317 if (mp->mnt_flag & MNT_SOFTDEP) { 318 /* XXX: Reset too late ? */ 319 MNT_ILOCK(mp); 320 mp->mnt_flag &= ~MNT_ASYNC; 321 MNT_IUNLOCK(mp); 322 } 323 /* 324 * Keep MNT_ACLS flag if it is stored in superblock. 325 */ 326 if ((fs->fs_flags & FS_ACLS) != 0) { 327 /* XXX: Set too late ? */ 328 MNT_ILOCK(mp); 329 mp->mnt_flag |= MNT_ACLS; 330 MNT_IUNLOCK(mp); 331 } 332 333 /* 334 * If this is a snapshot request, take the snapshot. 335 */ 336 if (mp->mnt_flag & MNT_SNAPSHOT) 337 return (ffs_snapshot(mp, fspec)); 338 } 339 340 /* 341 * Not an update, or updating the name: look up the name 342 * and verify that it refers to a sensible disk device. 343 */ 344 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 345 if ((error = namei(&ndp)) != 0) 346 return (error); 347 NDFREE(&ndp, NDF_ONLY_PNBUF); 348 devvp = ndp.ni_vp; 349 if (!vn_isdisk(devvp, &error)) { 350 vput(devvp); 351 return (error); 352 } 353 354 /* 355 * If mount by non-root, then verify that user has necessary 356 * permissions on the device. 357 */ 358 accessmode = VREAD; 359 if ((mp->mnt_flag & MNT_RDONLY) == 0) 360 accessmode |= VWRITE; 361 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 362 if (error) 363 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 364 if (error) { 365 vput(devvp); 366 return (error); 367 } 368 369 if (mp->mnt_flag & MNT_UPDATE) { 370 /* 371 * Update only 372 * 373 * If it's not the same vnode, or at least the same device 374 * then it's not correct. 375 */ 376 377 if (devvp->v_rdev != ump->um_devvp->v_rdev) 378 error = EINVAL; /* needs translation */ 379 vput(devvp); 380 if (error) 381 return (error); 382 } else { 383 /* 384 * New mount 385 * 386 * We need the name for the mount point (also used for 387 * "last mounted on") copied in. If an error occurs, 388 * the mount point is discarded by the upper level code. 389 * Note that vfs_mount() populates f_mntonname for us. 390 */ 391 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 392 vrele(devvp); 393 return (error); 394 } 395 } 396 vfs_mountedfrom(mp, fspec); 397 return (0); 398 } 399 400 /* 401 * Compatibility with old mount system call. 402 */ 403 404 static int 405 ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 406 { 407 struct ufs_args args; 408 int error; 409 410 if (data == NULL) 411 return (EINVAL); 412 error = copyin(data, &args, sizeof args); 413 if (error) 414 return (error); 415 416 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 417 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 418 error = kernel_mount(ma, flags); 419 420 return (error); 421 } 422 423 /* 424 * Reload all incore data for a filesystem (used after running fsck on 425 * the root filesystem and finding things to fix). The filesystem must 426 * be mounted read-only. 427 * 428 * Things to do to update the mount: 429 * 1) invalidate all cached meta-data. 430 * 2) re-read superblock from disk. 431 * 3) re-read summary information from disk. 432 * 4) invalidate all inactive vnodes. 433 * 5) invalidate all cached file data. 434 * 6) re-read inode data for all active vnodes. 435 */ 436 static int 437 ffs_reload(struct mount *mp, struct thread *td) 438 { 439 struct vnode *vp, *mvp, *devvp; 440 struct inode *ip; 441 void *space; 442 struct buf *bp; 443 struct fs *fs, *newfs; 444 struct ufsmount *ump; 445 ufs2_daddr_t sblockloc; 446 int i, blks, size, error; 447 int32_t *lp; 448 449 if ((mp->mnt_flag & MNT_RDONLY) == 0) 450 return (EINVAL); 451 ump = VFSTOUFS(mp); 452 /* 453 * Step 1: invalidate all cached meta-data. 454 */ 455 devvp = VFSTOUFS(mp)->um_devvp; 456 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 457 if (vinvalbuf(devvp, 0, td, 0, 0) != 0) 458 panic("ffs_reload: dirty1"); 459 VOP_UNLOCK(devvp, 0); 460 461 /* 462 * Step 2: re-read superblock from disk. 463 */ 464 fs = VFSTOUFS(mp)->um_fs; 465 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 466 NOCRED, &bp)) != 0) 467 return (error); 468 newfs = (struct fs *)bp->b_data; 469 if ((newfs->fs_magic != FS_UFS1_MAGIC && 470 newfs->fs_magic != FS_UFS2_MAGIC) || 471 newfs->fs_bsize > MAXBSIZE || 472 newfs->fs_bsize < sizeof(struct fs)) { 473 brelse(bp); 474 return (EIO); /* XXX needs translation */ 475 } 476 /* 477 * Copy pointer fields back into superblock before copying in XXX 478 * new superblock. These should really be in the ufsmount. XXX 479 * Note that important parameters (eg fs_ncg) are unchanged. 480 */ 481 newfs->fs_csp = fs->fs_csp; 482 newfs->fs_maxcluster = fs->fs_maxcluster; 483 newfs->fs_contigdirs = fs->fs_contigdirs; 484 newfs->fs_active = fs->fs_active; 485 /* The file system is still read-only. */ 486 newfs->fs_ronly = 1; 487 sblockloc = fs->fs_sblockloc; 488 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 489 brelse(bp); 490 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 491 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 492 UFS_LOCK(ump); 493 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 494 printf("%s: reload pending error: blocks %jd files %d\n", 495 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 496 fs->fs_pendinginodes); 497 fs->fs_pendingblocks = 0; 498 fs->fs_pendinginodes = 0; 499 } 500 UFS_UNLOCK(ump); 501 502 /* 503 * Step 3: re-read summary information from disk. 504 */ 505 blks = howmany(fs->fs_cssize, fs->fs_fsize); 506 space = fs->fs_csp; 507 for (i = 0; i < blks; i += fs->fs_frag) { 508 size = fs->fs_bsize; 509 if (i + fs->fs_frag > blks) 510 size = (blks - i) * fs->fs_fsize; 511 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 512 NOCRED, &bp); 513 if (error) 514 return (error); 515 bcopy(bp->b_data, space, (u_int)size); 516 space = (char *)space + size; 517 brelse(bp); 518 } 519 /* 520 * We no longer know anything about clusters per cylinder group. 521 */ 522 if (fs->fs_contigsumsize > 0) { 523 lp = fs->fs_maxcluster; 524 for (i = 0; i < fs->fs_ncg; i++) 525 *lp++ = fs->fs_contigsumsize; 526 } 527 528 loop: 529 MNT_ILOCK(mp); 530 MNT_VNODE_FOREACH(vp, mp, mvp) { 531 VI_LOCK(vp); 532 if (vp->v_iflag & VI_DOOMED) { 533 VI_UNLOCK(vp); 534 continue; 535 } 536 MNT_IUNLOCK(mp); 537 /* 538 * Step 4: invalidate all cached file data. 539 */ 540 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 541 MNT_VNODE_FOREACH_ABORT(mp, mvp); 542 goto loop; 543 } 544 if (vinvalbuf(vp, 0, td, 0, 0)) 545 panic("ffs_reload: dirty2"); 546 /* 547 * Step 5: re-read inode data for all active vnodes. 548 */ 549 ip = VTOI(vp); 550 error = 551 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 552 (int)fs->fs_bsize, NOCRED, &bp); 553 if (error) { 554 VOP_UNLOCK(vp, 0); 555 vrele(vp); 556 MNT_VNODE_FOREACH_ABORT(mp, mvp); 557 return (error); 558 } 559 ffs_load_inode(bp, ip, fs, ip->i_number); 560 ip->i_effnlink = ip->i_nlink; 561 brelse(bp); 562 VOP_UNLOCK(vp, 0); 563 vrele(vp); 564 MNT_ILOCK(mp); 565 } 566 MNT_IUNLOCK(mp); 567 return (0); 568 } 569 570 /* 571 * Possible superblock locations ordered from most to least likely. 572 */ 573 static int sblock_try[] = SBLOCKSEARCH; 574 575 /* 576 * Common code for mount and mountroot 577 */ 578 static int 579 ffs_mountfs(devvp, mp, td) 580 struct vnode *devvp; 581 struct mount *mp; 582 struct thread *td; 583 { 584 struct ufsmount *ump; 585 struct buf *bp; 586 struct fs *fs; 587 struct cdev *dev; 588 void *space; 589 ufs2_daddr_t sblockloc; 590 int error, i, blks, size, ronly; 591 int32_t *lp; 592 struct ucred *cred; 593 struct g_consumer *cp; 594 struct mount *nmp; 595 596 dev = devvp->v_rdev; 597 cred = td ? td->td_ucred : NOCRED; 598 599 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 600 DROP_GIANT(); 601 g_topology_lock(); 602 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 603 604 /* 605 * If we are a root mount, drop the E flag so fsck can do its magic. 606 * We will pick it up again when we remount R/W. 607 */ 608 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 609 error = g_access(cp, 0, 0, -1); 610 g_topology_unlock(); 611 PICKUP_GIANT(); 612 VOP_UNLOCK(devvp, 0); 613 if (error) 614 return (error); 615 if (devvp->v_rdev->si_iosize_max != 0) 616 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 617 if (mp->mnt_iosize_max > MAXPHYS) 618 mp->mnt_iosize_max = MAXPHYS; 619 620 devvp->v_bufobj.bo_private = cp; 621 devvp->v_bufobj.bo_ops = &ffs_ops; 622 623 bp = NULL; 624 ump = NULL; 625 fs = NULL; 626 sblockloc = 0; 627 /* 628 * Try reading the superblock in each of its possible locations. 629 */ 630 for (i = 0; sblock_try[i] != -1; i++) { 631 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 632 error = EINVAL; 633 vfs_mount_error(mp, 634 "Invalid sectorsize %d for superblock size %d", 635 cp->provider->sectorsize, SBLOCKSIZE); 636 goto out; 637 } 638 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 639 cred, &bp)) != 0) 640 goto out; 641 fs = (struct fs *)bp->b_data; 642 sblockloc = sblock_try[i]; 643 if ((fs->fs_magic == FS_UFS1_MAGIC || 644 (fs->fs_magic == FS_UFS2_MAGIC && 645 (fs->fs_sblockloc == sblockloc || 646 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 647 fs->fs_bsize <= MAXBSIZE && 648 fs->fs_bsize >= sizeof(struct fs)) 649 break; 650 brelse(bp); 651 bp = NULL; 652 } 653 if (sblock_try[i] == -1) { 654 error = EINVAL; /* XXX needs translation */ 655 goto out; 656 } 657 fs->fs_fmod = 0; 658 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 659 fs->fs_flags &= ~FS_UNCLEAN; 660 if (fs->fs_clean == 0) { 661 fs->fs_flags |= FS_UNCLEAN; 662 if (ronly || (mp->mnt_flag & MNT_FORCE) || 663 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 664 (fs->fs_flags & FS_DOSOFTDEP))) { 665 printf( 666 "WARNING: %s was not properly dismounted\n", 667 fs->fs_fsmnt); 668 } else { 669 printf( 670 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 671 fs->fs_fsmnt); 672 error = EPERM; 673 goto out; 674 } 675 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 676 (mp->mnt_flag & MNT_FORCE)) { 677 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 678 (intmax_t)fs->fs_pendingblocks, 679 fs->fs_pendinginodes); 680 fs->fs_pendingblocks = 0; 681 fs->fs_pendinginodes = 0; 682 } 683 } 684 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 685 printf("%s: mount pending error: blocks %jd files %d\n", 686 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 687 fs->fs_pendinginodes); 688 fs->fs_pendingblocks = 0; 689 fs->fs_pendinginodes = 0; 690 } 691 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 692 #ifdef UFS_GJOURNAL 693 /* 694 * Get journal provider name. 695 */ 696 size = 1024; 697 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 698 if (g_io_getattr("GJOURNAL::provider", cp, &size, 699 mp->mnt_gjprovider) == 0) { 700 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 701 M_UFSMNT, M_WAITOK); 702 MNT_ILOCK(mp); 703 mp->mnt_flag |= MNT_GJOURNAL; 704 MNT_IUNLOCK(mp); 705 } else { 706 printf( 707 "WARNING: %s: GJOURNAL flag on fs but no gjournal provider below\n", 708 mp->mnt_stat.f_mntonname); 709 free(mp->mnt_gjprovider, M_UFSMNT); 710 mp->mnt_gjprovider = NULL; 711 } 712 #else 713 printf( 714 "WARNING: %s: GJOURNAL flag on fs but no UFS_GJOURNAL support\n", 715 mp->mnt_stat.f_mntonname); 716 #endif 717 } else { 718 mp->mnt_gjprovider = NULL; 719 } 720 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 721 ump->um_cp = cp; 722 ump->um_bo = &devvp->v_bufobj; 723 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 724 if (fs->fs_magic == FS_UFS1_MAGIC) { 725 ump->um_fstype = UFS1; 726 ump->um_balloc = ffs_balloc_ufs1; 727 } else { 728 ump->um_fstype = UFS2; 729 ump->um_balloc = ffs_balloc_ufs2; 730 } 731 ump->um_blkatoff = ffs_blkatoff; 732 ump->um_truncate = ffs_truncate; 733 ump->um_update = ffs_update; 734 ump->um_valloc = ffs_valloc; 735 ump->um_vfree = ffs_vfree; 736 ump->um_ifree = ffs_ifree; 737 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 738 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 739 if (fs->fs_sbsize < SBLOCKSIZE) 740 bp->b_flags |= B_INVAL | B_NOCACHE; 741 brelse(bp); 742 bp = NULL; 743 fs = ump->um_fs; 744 ffs_oldfscompat_read(fs, ump, sblockloc); 745 fs->fs_ronly = ronly; 746 size = fs->fs_cssize; 747 blks = howmany(size, fs->fs_fsize); 748 if (fs->fs_contigsumsize > 0) 749 size += fs->fs_ncg * sizeof(int32_t); 750 size += fs->fs_ncg * sizeof(u_int8_t); 751 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 752 fs->fs_csp = space; 753 for (i = 0; i < blks; i += fs->fs_frag) { 754 size = fs->fs_bsize; 755 if (i + fs->fs_frag > blks) 756 size = (blks - i) * fs->fs_fsize; 757 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 758 cred, &bp)) != 0) { 759 free(fs->fs_csp, M_UFSMNT); 760 goto out; 761 } 762 bcopy(bp->b_data, space, (u_int)size); 763 space = (char *)space + size; 764 brelse(bp); 765 bp = NULL; 766 } 767 if (fs->fs_contigsumsize > 0) { 768 fs->fs_maxcluster = lp = space; 769 for (i = 0; i < fs->fs_ncg; i++) 770 *lp++ = fs->fs_contigsumsize; 771 space = lp; 772 } 773 size = fs->fs_ncg * sizeof(u_int8_t); 774 fs->fs_contigdirs = (u_int8_t *)space; 775 bzero(fs->fs_contigdirs, size); 776 fs->fs_active = NULL; 777 mp->mnt_data = ump; 778 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 779 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 780 nmp = NULL; 781 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 782 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 783 if (nmp) 784 vfs_rel(nmp); 785 vfs_getnewfsid(mp); 786 } 787 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 788 MNT_ILOCK(mp); 789 mp->mnt_flag |= MNT_LOCAL; 790 MNT_IUNLOCK(mp); 791 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 792 #ifdef MAC 793 MNT_ILOCK(mp); 794 mp->mnt_flag |= MNT_MULTILABEL; 795 MNT_IUNLOCK(mp); 796 #else 797 printf( 798 "WARNING: %s: multilabel flag on fs but no MAC support\n", 799 mp->mnt_stat.f_mntonname); 800 #endif 801 } 802 if ((fs->fs_flags & FS_ACLS) != 0) { 803 #ifdef UFS_ACL 804 MNT_ILOCK(mp); 805 mp->mnt_flag |= MNT_ACLS; 806 MNT_IUNLOCK(mp); 807 #else 808 printf( 809 "WARNING: %s: ACLs flag on fs but no ACLs support\n", 810 mp->mnt_stat.f_mntonname); 811 #endif 812 } 813 ump->um_mountp = mp; 814 ump->um_dev = dev; 815 ump->um_devvp = devvp; 816 ump->um_nindir = fs->fs_nindir; 817 ump->um_bptrtodb = fs->fs_fsbtodb; 818 ump->um_seqinc = fs->fs_frag; 819 for (i = 0; i < MAXQUOTAS; i++) 820 ump->um_quotas[i] = NULLVP; 821 #ifdef UFS_EXTATTR 822 ufs_extattr_uepm_init(&ump->um_extattr); 823 #endif 824 /* 825 * Set FS local "last mounted on" information (NULL pad) 826 */ 827 bzero(fs->fs_fsmnt, MAXMNTLEN); 828 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 829 830 if( mp->mnt_flag & MNT_ROOTFS) { 831 /* 832 * Root mount; update timestamp in mount structure. 833 * this will be used by the common root mount code 834 * to update the system clock. 835 */ 836 mp->mnt_time = fs->fs_time; 837 } 838 839 if (ronly == 0) { 840 if ((fs->fs_flags & FS_DOSOFTDEP) && 841 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 842 free(fs->fs_csp, M_UFSMNT); 843 goto out; 844 } 845 if (fs->fs_snapinum[0] != 0) 846 ffs_snapshot_mount(mp); 847 fs->fs_fmod = 1; 848 fs->fs_clean = 0; 849 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 850 } 851 /* 852 * Initialize filesystem stat information in mount struct. 853 */ 854 MNT_ILOCK(mp); 855 mp->mnt_kern_flag |= MNTK_MPSAFE; 856 MNT_IUNLOCK(mp); 857 #ifdef UFS_EXTATTR 858 #ifdef UFS_EXTATTR_AUTOSTART 859 /* 860 * 861 * Auto-starting does the following: 862 * - check for /.attribute in the fs, and extattr_start if so 863 * - for each file in .attribute, enable that file with 864 * an attribute of the same name. 865 * Not clear how to report errors -- probably eat them. 866 * This would all happen while the filesystem was busy/not 867 * available, so would effectively be "atomic". 868 */ 869 mp->mnt_stat.f_iosize = fs->fs_bsize; 870 (void) ufs_extattr_autostart(mp, td); 871 #endif /* !UFS_EXTATTR_AUTOSTART */ 872 #endif /* !UFS_EXTATTR */ 873 return (0); 874 out: 875 if (bp) 876 brelse(bp); 877 if (cp != NULL) { 878 DROP_GIANT(); 879 g_topology_lock(); 880 g_vfs_close(cp, td); 881 g_topology_unlock(); 882 PICKUP_GIANT(); 883 } 884 if (ump) { 885 mtx_destroy(UFS_MTX(ump)); 886 if (mp->mnt_gjprovider != NULL) { 887 free(mp->mnt_gjprovider, M_UFSMNT); 888 mp->mnt_gjprovider = NULL; 889 } 890 free(ump->um_fs, M_UFSMNT); 891 free(ump, M_UFSMNT); 892 mp->mnt_data = NULL; 893 } 894 return (error); 895 } 896 897 #include <sys/sysctl.h> 898 static int bigcgs = 0; 899 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 900 901 /* 902 * Sanity checks for loading old filesystem superblocks. 903 * See ffs_oldfscompat_write below for unwound actions. 904 * 905 * XXX - Parts get retired eventually. 906 * Unfortunately new bits get added. 907 */ 908 static void 909 ffs_oldfscompat_read(fs, ump, sblockloc) 910 struct fs *fs; 911 struct ufsmount *ump; 912 ufs2_daddr_t sblockloc; 913 { 914 off_t maxfilesize; 915 916 /* 917 * If not yet done, update fs_flags location and value of fs_sblockloc. 918 */ 919 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 920 fs->fs_flags = fs->fs_old_flags; 921 fs->fs_old_flags |= FS_FLAGS_UPDATED; 922 fs->fs_sblockloc = sblockloc; 923 } 924 /* 925 * If not yet done, update UFS1 superblock with new wider fields. 926 */ 927 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 928 fs->fs_maxbsize = fs->fs_bsize; 929 fs->fs_time = fs->fs_old_time; 930 fs->fs_size = fs->fs_old_size; 931 fs->fs_dsize = fs->fs_old_dsize; 932 fs->fs_csaddr = fs->fs_old_csaddr; 933 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 934 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 935 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 936 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 937 } 938 if (fs->fs_magic == FS_UFS1_MAGIC && 939 fs->fs_old_inodefmt < FS_44INODEFMT) { 940 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 941 fs->fs_qbmask = ~fs->fs_bmask; 942 fs->fs_qfmask = ~fs->fs_fmask; 943 } 944 if (fs->fs_magic == FS_UFS1_MAGIC) { 945 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 946 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 947 if (fs->fs_maxfilesize > maxfilesize) 948 fs->fs_maxfilesize = maxfilesize; 949 } 950 /* Compatibility for old filesystems */ 951 if (fs->fs_avgfilesize <= 0) 952 fs->fs_avgfilesize = AVFILESIZ; 953 if (fs->fs_avgfpdir <= 0) 954 fs->fs_avgfpdir = AFPDIR; 955 if (bigcgs) { 956 fs->fs_save_cgsize = fs->fs_cgsize; 957 fs->fs_cgsize = fs->fs_bsize; 958 } 959 } 960 961 /* 962 * Unwinding superblock updates for old filesystems. 963 * See ffs_oldfscompat_read above for details. 964 * 965 * XXX - Parts get retired eventually. 966 * Unfortunately new bits get added. 967 */ 968 static void 969 ffs_oldfscompat_write(fs, ump) 970 struct fs *fs; 971 struct ufsmount *ump; 972 { 973 974 /* 975 * Copy back UFS2 updated fields that UFS1 inspects. 976 */ 977 if (fs->fs_magic == FS_UFS1_MAGIC) { 978 fs->fs_old_time = fs->fs_time; 979 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 980 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 981 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 982 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 983 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 984 } 985 if (bigcgs) { 986 fs->fs_cgsize = fs->fs_save_cgsize; 987 fs->fs_save_cgsize = 0; 988 } 989 } 990 991 /* 992 * unmount system call 993 */ 994 static int 995 ffs_unmount(mp, mntflags, td) 996 struct mount *mp; 997 int mntflags; 998 struct thread *td; 999 { 1000 struct ufsmount *ump = VFSTOUFS(mp); 1001 struct fs *fs; 1002 int error, flags; 1003 1004 flags = 0; 1005 if (mntflags & MNT_FORCE) { 1006 flags |= FORCECLOSE; 1007 } 1008 #ifdef UFS_EXTATTR 1009 if ((error = ufs_extattr_stop(mp, td))) { 1010 if (error != EOPNOTSUPP) 1011 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 1012 error); 1013 } else { 1014 ufs_extattr_uepm_destroy(&ump->um_extattr); 1015 } 1016 #endif 1017 if (mp->mnt_flag & MNT_SOFTDEP) { 1018 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 1019 return (error); 1020 } else { 1021 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 1022 return (error); 1023 } 1024 fs = ump->um_fs; 1025 UFS_LOCK(ump); 1026 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1027 printf("%s: unmount pending error: blocks %jd files %d\n", 1028 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1029 fs->fs_pendinginodes); 1030 fs->fs_pendingblocks = 0; 1031 fs->fs_pendinginodes = 0; 1032 } 1033 UFS_UNLOCK(ump); 1034 if (fs->fs_ronly == 0) { 1035 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1036 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1037 if (error) { 1038 fs->fs_clean = 0; 1039 return (error); 1040 } 1041 } 1042 DROP_GIANT(); 1043 g_topology_lock(); 1044 g_vfs_close(ump->um_cp, td); 1045 g_topology_unlock(); 1046 PICKUP_GIANT(); 1047 vrele(ump->um_devvp); 1048 mtx_destroy(UFS_MTX(ump)); 1049 if (mp->mnt_gjprovider != NULL) { 1050 free(mp->mnt_gjprovider, M_UFSMNT); 1051 mp->mnt_gjprovider = NULL; 1052 } 1053 free(fs->fs_csp, M_UFSMNT); 1054 free(fs, M_UFSMNT); 1055 free(ump, M_UFSMNT); 1056 mp->mnt_data = NULL; 1057 MNT_ILOCK(mp); 1058 mp->mnt_flag &= ~MNT_LOCAL; 1059 MNT_IUNLOCK(mp); 1060 return (error); 1061 } 1062 1063 /* 1064 * Flush out all the files in a filesystem. 1065 */ 1066 int 1067 ffs_flushfiles(mp, flags, td) 1068 struct mount *mp; 1069 int flags; 1070 struct thread *td; 1071 { 1072 struct ufsmount *ump; 1073 int error; 1074 1075 ump = VFSTOUFS(mp); 1076 #ifdef QUOTA 1077 if (mp->mnt_flag & MNT_QUOTA) { 1078 int i; 1079 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1080 if (error) 1081 return (error); 1082 for (i = 0; i < MAXQUOTAS; i++) { 1083 quotaoff(td, mp, i); 1084 } 1085 /* 1086 * Here we fall through to vflush again to ensure 1087 * that we have gotten rid of all the system vnodes. 1088 */ 1089 } 1090 #endif 1091 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1092 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1093 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1094 return (error); 1095 ffs_snapshot_unmount(mp); 1096 flags |= FORCECLOSE; 1097 /* 1098 * Here we fall through to vflush again to ensure 1099 * that we have gotten rid of all the system vnodes. 1100 */ 1101 } 1102 /* 1103 * Flush all the files. 1104 */ 1105 if ((error = vflush(mp, 0, flags, td)) != 0) 1106 return (error); 1107 /* 1108 * Flush filesystem metadata. 1109 */ 1110 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1111 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1112 VOP_UNLOCK(ump->um_devvp, 0); 1113 return (error); 1114 } 1115 1116 /* 1117 * Get filesystem statistics. 1118 */ 1119 static int 1120 ffs_statfs(mp, sbp, td) 1121 struct mount *mp; 1122 struct statfs *sbp; 1123 struct thread *td; 1124 { 1125 struct ufsmount *ump; 1126 struct fs *fs; 1127 1128 ump = VFSTOUFS(mp); 1129 fs = ump->um_fs; 1130 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1131 panic("ffs_statfs"); 1132 sbp->f_version = STATFS_VERSION; 1133 sbp->f_bsize = fs->fs_fsize; 1134 sbp->f_iosize = fs->fs_bsize; 1135 sbp->f_blocks = fs->fs_dsize; 1136 UFS_LOCK(ump); 1137 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1138 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1139 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1140 dbtofsb(fs, fs->fs_pendingblocks); 1141 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1142 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1143 UFS_UNLOCK(ump); 1144 sbp->f_namemax = NAME_MAX; 1145 return (0); 1146 } 1147 1148 /* 1149 * Go through the disk queues to initiate sandbagged IO; 1150 * go through the inodes to write those that have been modified; 1151 * initiate the writing of the super block if it has been modified. 1152 * 1153 * Note: we are always called with the filesystem marked `MPBUSY'. 1154 */ 1155 static int 1156 ffs_sync(mp, waitfor, td) 1157 struct mount *mp; 1158 int waitfor; 1159 struct thread *td; 1160 { 1161 struct vnode *mvp, *vp, *devvp; 1162 struct inode *ip; 1163 struct ufsmount *ump = VFSTOUFS(mp); 1164 struct fs *fs; 1165 int error, count, wait, lockreq, allerror = 0; 1166 int suspend; 1167 int suspended; 1168 int secondary_writes; 1169 int secondary_accwrites; 1170 int softdep_deps; 1171 int softdep_accdeps; 1172 struct bufobj *bo; 1173 1174 fs = ump->um_fs; 1175 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1176 printf("fs = %s\n", fs->fs_fsmnt); 1177 panic("ffs_sync: rofs mod"); 1178 } 1179 /* 1180 * Write back each (modified) inode. 1181 */ 1182 wait = 0; 1183 suspend = 0; 1184 suspended = 0; 1185 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1186 if (waitfor == MNT_SUSPEND) { 1187 suspend = 1; 1188 waitfor = MNT_WAIT; 1189 } 1190 if (waitfor == MNT_WAIT) { 1191 wait = 1; 1192 lockreq = LK_EXCLUSIVE; 1193 } 1194 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1195 MNT_ILOCK(mp); 1196 loop: 1197 /* Grab snapshot of secondary write counts */ 1198 secondary_writes = mp->mnt_secondary_writes; 1199 secondary_accwrites = mp->mnt_secondary_accwrites; 1200 1201 /* Grab snapshot of softdep dependency counts */ 1202 MNT_IUNLOCK(mp); 1203 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1204 MNT_ILOCK(mp); 1205 1206 MNT_VNODE_FOREACH(vp, mp, mvp) { 1207 /* 1208 * Depend on the mntvnode_slock to keep things stable enough 1209 * for a quick test. Since there might be hundreds of 1210 * thousands of vnodes, we cannot afford even a subroutine 1211 * call unless there's a good chance that we have work to do. 1212 */ 1213 VI_LOCK(vp); 1214 if (vp->v_iflag & VI_DOOMED) { 1215 VI_UNLOCK(vp); 1216 continue; 1217 } 1218 ip = VTOI(vp); 1219 if (vp->v_type == VNON || ((ip->i_flag & 1220 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1221 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1222 VI_UNLOCK(vp); 1223 continue; 1224 } 1225 MNT_IUNLOCK(mp); 1226 if ((error = vget(vp, lockreq, td)) != 0) { 1227 MNT_ILOCK(mp); 1228 if (error == ENOENT || error == ENOLCK) { 1229 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1230 goto loop; 1231 } 1232 continue; 1233 } 1234 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1235 allerror = error; 1236 vput(vp); 1237 MNT_ILOCK(mp); 1238 } 1239 MNT_IUNLOCK(mp); 1240 /* 1241 * Force stale filesystem control information to be flushed. 1242 */ 1243 if (waitfor == MNT_WAIT) { 1244 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1245 allerror = error; 1246 /* Flushed work items may create new vnodes to clean */ 1247 if (allerror == 0 && count) { 1248 MNT_ILOCK(mp); 1249 goto loop; 1250 } 1251 } 1252 #ifdef QUOTA 1253 qsync(mp); 1254 #endif 1255 devvp = ump->um_devvp; 1256 bo = &devvp->v_bufobj; 1257 BO_LOCK(bo); 1258 if (waitfor != MNT_LAZY && 1259 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1260 BO_UNLOCK(bo); 1261 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1262 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1263 allerror = error; 1264 VOP_UNLOCK(devvp, 0); 1265 if (allerror == 0 && waitfor == MNT_WAIT) { 1266 MNT_ILOCK(mp); 1267 goto loop; 1268 } 1269 } else if (suspend != 0) { 1270 if (softdep_check_suspend(mp, 1271 devvp, 1272 softdep_deps, 1273 softdep_accdeps, 1274 secondary_writes, 1275 secondary_accwrites) != 0) 1276 goto loop; /* More work needed */ 1277 mtx_assert(MNT_MTX(mp), MA_OWNED); 1278 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1279 MNT_IUNLOCK(mp); 1280 suspended = 1; 1281 } else 1282 BO_UNLOCK(bo); 1283 /* 1284 * Write back modified superblock. 1285 */ 1286 if (fs->fs_fmod != 0 && 1287 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1288 allerror = error; 1289 return (allerror); 1290 } 1291 1292 int 1293 ffs_vget(mp, ino, flags, vpp) 1294 struct mount *mp; 1295 ino_t ino; 1296 int flags; 1297 struct vnode **vpp; 1298 { 1299 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1300 } 1301 1302 int 1303 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1304 struct mount *mp; 1305 ino_t ino; 1306 int flags; 1307 struct vnode **vpp; 1308 int ffs_flags; 1309 { 1310 struct fs *fs; 1311 struct inode *ip; 1312 struct ufsmount *ump; 1313 struct buf *bp; 1314 struct vnode *vp; 1315 struct cdev *dev; 1316 int error; 1317 1318 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1319 if (error || *vpp != NULL) 1320 return (error); 1321 1322 /* 1323 * We must promote to an exclusive lock for vnode creation. This 1324 * can happen if lookup is passed LOCKSHARED. 1325 */ 1326 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1327 flags &= ~LK_TYPE_MASK; 1328 flags |= LK_EXCLUSIVE; 1329 } 1330 1331 /* 1332 * We do not lock vnode creation as it is believed to be too 1333 * expensive for such rare case as simultaneous creation of vnode 1334 * for same ino by different processes. We just allow them to race 1335 * and check later to decide who wins. Let the race begin! 1336 */ 1337 1338 ump = VFSTOUFS(mp); 1339 dev = ump->um_dev; 1340 fs = ump->um_fs; 1341 1342 /* 1343 * If this MALLOC() is performed after the getnewvnode() 1344 * it might block, leaving a vnode with a NULL v_data to be 1345 * found by ffs_sync() if a sync happens to fire right then, 1346 * which will cause a panic because ffs_sync() blindly 1347 * dereferences vp->v_data (as well it should). 1348 */ 1349 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1350 1351 /* Allocate a new vnode/inode. */ 1352 if (fs->fs_magic == FS_UFS1_MAGIC) 1353 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1354 else 1355 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1356 if (error) { 1357 *vpp = NULL; 1358 uma_zfree(uma_inode, ip); 1359 return (error); 1360 } 1361 /* 1362 * FFS supports recursive and shared locking. 1363 */ 1364 VN_LOCK_AREC(vp); 1365 VN_LOCK_ASHARE(vp); 1366 vp->v_data = ip; 1367 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1368 ip->i_vnode = vp; 1369 ip->i_ump = ump; 1370 ip->i_fs = fs; 1371 ip->i_dev = dev; 1372 ip->i_number = ino; 1373 #ifdef QUOTA 1374 { 1375 int i; 1376 for (i = 0; i < MAXQUOTAS; i++) 1377 ip->i_dquot[i] = NODQUOT; 1378 } 1379 #endif 1380 1381 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1382 if (ffs_flags & FFSV_FORCEINSMQ) 1383 vp->v_vflag |= VV_FORCEINSMQ; 1384 error = insmntque(vp, mp); 1385 if (error != 0) { 1386 uma_zfree(uma_inode, ip); 1387 *vpp = NULL; 1388 return (error); 1389 } 1390 vp->v_vflag &= ~VV_FORCEINSMQ; 1391 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1392 if (error || *vpp != NULL) 1393 return (error); 1394 1395 /* Read in the disk contents for the inode, copy into the inode. */ 1396 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1397 (int)fs->fs_bsize, NOCRED, &bp); 1398 if (error) { 1399 /* 1400 * The inode does not contain anything useful, so it would 1401 * be misleading to leave it on its hash chain. With mode 1402 * still zero, it will be unlinked and returned to the free 1403 * list by vput(). 1404 */ 1405 brelse(bp); 1406 vput(vp); 1407 *vpp = NULL; 1408 return (error); 1409 } 1410 if (ip->i_ump->um_fstype == UFS1) 1411 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1412 else 1413 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1414 ffs_load_inode(bp, ip, fs, ino); 1415 if (DOINGSOFTDEP(vp)) 1416 softdep_load_inodeblock(ip); 1417 else 1418 ip->i_effnlink = ip->i_nlink; 1419 bqrelse(bp); 1420 1421 /* 1422 * Initialize the vnode from the inode, check for aliases. 1423 * Note that the underlying vnode may have changed. 1424 */ 1425 if (ip->i_ump->um_fstype == UFS1) 1426 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1427 else 1428 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1429 if (error) { 1430 vput(vp); 1431 *vpp = NULL; 1432 return (error); 1433 } 1434 1435 /* 1436 * Finish inode initialization. 1437 */ 1438 1439 /* 1440 * Set up a generation number for this inode if it does not 1441 * already have one. This should only happen on old filesystems. 1442 */ 1443 if (ip->i_gen == 0) { 1444 ip->i_gen = arc4random() / 2 + 1; 1445 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1446 ip->i_flag |= IN_MODIFIED; 1447 DIP_SET(ip, i_gen, ip->i_gen); 1448 } 1449 } 1450 /* 1451 * Ensure that uid and gid are correct. This is a temporary 1452 * fix until fsck has been changed to do the update. 1453 */ 1454 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1455 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1456 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1457 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1458 } /* XXX */ 1459 1460 #ifdef MAC 1461 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1462 /* 1463 * If this vnode is already allocated, and we're running 1464 * multi-label, attempt to perform a label association 1465 * from the extended attributes on the inode. 1466 */ 1467 error = mac_vnode_associate_extattr(mp, vp); 1468 if (error) { 1469 /* ufs_inactive will release ip->i_devvp ref. */ 1470 vput(vp); 1471 *vpp = NULL; 1472 return (error); 1473 } 1474 } 1475 #endif 1476 1477 *vpp = vp; 1478 return (0); 1479 } 1480 1481 /* 1482 * File handle to vnode 1483 * 1484 * Have to be really careful about stale file handles: 1485 * - check that the inode number is valid 1486 * - call ffs_vget() to get the locked inode 1487 * - check for an unallocated inode (i_mode == 0) 1488 * - check that the given client host has export rights and return 1489 * those rights via. exflagsp and credanonp 1490 */ 1491 static int 1492 ffs_fhtovp(mp, fhp, vpp) 1493 struct mount *mp; 1494 struct fid *fhp; 1495 struct vnode **vpp; 1496 { 1497 struct ufid *ufhp; 1498 struct fs *fs; 1499 1500 ufhp = (struct ufid *)fhp; 1501 fs = VFSTOUFS(mp)->um_fs; 1502 if (ufhp->ufid_ino < ROOTINO || 1503 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1504 return (ESTALE); 1505 return (ufs_fhtovp(mp, ufhp, vpp)); 1506 } 1507 1508 /* 1509 * Initialize the filesystem. 1510 */ 1511 static int 1512 ffs_init(vfsp) 1513 struct vfsconf *vfsp; 1514 { 1515 1516 softdep_initialize(); 1517 return (ufs_init(vfsp)); 1518 } 1519 1520 /* 1521 * Undo the work of ffs_init(). 1522 */ 1523 static int 1524 ffs_uninit(vfsp) 1525 struct vfsconf *vfsp; 1526 { 1527 int ret; 1528 1529 ret = ufs_uninit(vfsp); 1530 softdep_uninitialize(); 1531 return (ret); 1532 } 1533 1534 /* 1535 * Write a superblock and associated information back to disk. 1536 */ 1537 int 1538 ffs_sbupdate(mp, waitfor, suspended) 1539 struct ufsmount *mp; 1540 int waitfor; 1541 int suspended; 1542 { 1543 struct fs *fs = mp->um_fs; 1544 struct buf *sbbp; 1545 struct buf *bp; 1546 int blks; 1547 void *space; 1548 int i, size, error, allerror = 0; 1549 1550 if (fs->fs_ronly == 1 && 1551 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1552 (MNT_RDONLY | MNT_UPDATE)) 1553 panic("ffs_sbupdate: write read-only filesystem"); 1554 /* 1555 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1556 */ 1557 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1558 0, 0, 0); 1559 /* 1560 * First write back the summary information. 1561 */ 1562 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1563 space = fs->fs_csp; 1564 for (i = 0; i < blks; i += fs->fs_frag) { 1565 size = fs->fs_bsize; 1566 if (i + fs->fs_frag > blks) 1567 size = (blks - i) * fs->fs_fsize; 1568 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1569 size, 0, 0, 0); 1570 bcopy(space, bp->b_data, (u_int)size); 1571 space = (char *)space + size; 1572 if (suspended) 1573 bp->b_flags |= B_VALIDSUSPWRT; 1574 if (waitfor != MNT_WAIT) 1575 bawrite(bp); 1576 else if ((error = bwrite(bp)) != 0) 1577 allerror = error; 1578 } 1579 /* 1580 * Now write back the superblock itself. If any errors occurred 1581 * up to this point, then fail so that the superblock avoids 1582 * being written out as clean. 1583 */ 1584 if (allerror) { 1585 brelse(sbbp); 1586 return (allerror); 1587 } 1588 bp = sbbp; 1589 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1590 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1591 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1592 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1593 fs->fs_sblockloc = SBLOCK_UFS1; 1594 } 1595 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1596 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1597 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1598 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1599 fs->fs_sblockloc = SBLOCK_UFS2; 1600 } 1601 fs->fs_fmod = 0; 1602 fs->fs_time = time_second; 1603 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1604 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1605 if (suspended) 1606 bp->b_flags |= B_VALIDSUSPWRT; 1607 if (waitfor != MNT_WAIT) 1608 bawrite(bp); 1609 else if ((error = bwrite(bp)) != 0) 1610 allerror = error; 1611 return (allerror); 1612 } 1613 1614 static int 1615 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1616 int attrnamespace, const char *attrname, struct thread *td) 1617 { 1618 1619 #ifdef UFS_EXTATTR 1620 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1621 attrname, td)); 1622 #else 1623 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1624 attrname, td)); 1625 #endif 1626 } 1627 1628 static void 1629 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1630 { 1631 1632 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1633 uma_zfree(uma_ufs1, ip->i_din1); 1634 else if (ip->i_din2 != NULL) 1635 uma_zfree(uma_ufs2, ip->i_din2); 1636 uma_zfree(uma_inode, ip); 1637 } 1638 1639 static int dobkgrdwrite = 1; 1640 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1641 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1642 1643 /* 1644 * Complete a background write started from bwrite. 1645 */ 1646 static void 1647 ffs_backgroundwritedone(struct buf *bp) 1648 { 1649 struct bufobj *bufobj; 1650 struct buf *origbp; 1651 1652 /* 1653 * Find the original buffer that we are writing. 1654 */ 1655 bufobj = bp->b_bufobj; 1656 BO_LOCK(bufobj); 1657 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1658 panic("backgroundwritedone: lost buffer"); 1659 /* Grab an extra reference to be dropped by the bufdone() below. */ 1660 bufobj_wrefl(bufobj); 1661 BO_UNLOCK(bufobj); 1662 /* 1663 * Process dependencies then return any unfinished ones. 1664 */ 1665 if (!LIST_EMPTY(&bp->b_dep)) 1666 buf_complete(bp); 1667 #ifdef SOFTUPDATES 1668 if (!LIST_EMPTY(&bp->b_dep)) 1669 softdep_move_dependencies(bp, origbp); 1670 #endif 1671 /* 1672 * This buffer is marked B_NOCACHE so when it is released 1673 * by biodone it will be tossed. 1674 */ 1675 bp->b_flags |= B_NOCACHE; 1676 bp->b_flags &= ~B_CACHE; 1677 bufdone(bp); 1678 BO_LOCK(bufobj); 1679 /* 1680 * Clear the BV_BKGRDINPROG flag in the original buffer 1681 * and awaken it if it is waiting for the write to complete. 1682 * If BV_BKGRDINPROG is not set in the original buffer it must 1683 * have been released and re-instantiated - which is not legal. 1684 */ 1685 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1686 ("backgroundwritedone: lost buffer2")); 1687 origbp->b_vflags &= ~BV_BKGRDINPROG; 1688 if (origbp->b_vflags & BV_BKGRDWAIT) { 1689 origbp->b_vflags &= ~BV_BKGRDWAIT; 1690 wakeup(&origbp->b_xflags); 1691 } 1692 BO_UNLOCK(bufobj); 1693 } 1694 1695 1696 /* 1697 * Write, release buffer on completion. (Done by iodone 1698 * if async). Do not bother writing anything if the buffer 1699 * is invalid. 1700 * 1701 * Note that we set B_CACHE here, indicating that buffer is 1702 * fully valid and thus cacheable. This is true even of NFS 1703 * now so we set it generally. This could be set either here 1704 * or in biodone() since the I/O is synchronous. We put it 1705 * here. 1706 */ 1707 static int 1708 ffs_bufwrite(struct buf *bp) 1709 { 1710 int oldflags, s; 1711 struct buf *newbp; 1712 1713 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1714 if (bp->b_flags & B_INVAL) { 1715 brelse(bp); 1716 return (0); 1717 } 1718 1719 oldflags = bp->b_flags; 1720 1721 if (!BUF_ISLOCKED(bp)) 1722 panic("bufwrite: buffer is not busy???"); 1723 s = splbio(); 1724 /* 1725 * If a background write is already in progress, delay 1726 * writing this block if it is asynchronous. Otherwise 1727 * wait for the background write to complete. 1728 */ 1729 BO_LOCK(bp->b_bufobj); 1730 if (bp->b_vflags & BV_BKGRDINPROG) { 1731 if (bp->b_flags & B_ASYNC) { 1732 BO_UNLOCK(bp->b_bufobj); 1733 splx(s); 1734 bdwrite(bp); 1735 return (0); 1736 } 1737 bp->b_vflags |= BV_BKGRDWAIT; 1738 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1739 if (bp->b_vflags & BV_BKGRDINPROG) 1740 panic("bufwrite: still writing"); 1741 } 1742 BO_UNLOCK(bp->b_bufobj); 1743 1744 /* Mark the buffer clean */ 1745 bundirty(bp); 1746 1747 /* 1748 * If this buffer is marked for background writing and we 1749 * do not have to wait for it, make a copy and write the 1750 * copy so as to leave this buffer ready for further use. 1751 * 1752 * This optimization eats a lot of memory. If we have a page 1753 * or buffer shortfall we can't do it. 1754 */ 1755 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1756 (bp->b_flags & B_ASYNC) && 1757 !vm_page_count_severe() && 1758 !buf_dirty_count_severe()) { 1759 KASSERT(bp->b_iodone == NULL, 1760 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1761 1762 /* get a new block */ 1763 newbp = geteblk(bp->b_bufsize); 1764 1765 /* 1766 * set it to be identical to the old block. We have to 1767 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1768 * to avoid confusing the splay tree and gbincore(). 1769 */ 1770 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1771 newbp->b_lblkno = bp->b_lblkno; 1772 newbp->b_xflags |= BX_BKGRDMARKER; 1773 BO_LOCK(bp->b_bufobj); 1774 bp->b_vflags |= BV_BKGRDINPROG; 1775 bgetvp(bp->b_vp, newbp); 1776 BO_UNLOCK(bp->b_bufobj); 1777 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1778 newbp->b_blkno = bp->b_blkno; 1779 newbp->b_offset = bp->b_offset; 1780 newbp->b_iodone = ffs_backgroundwritedone; 1781 newbp->b_flags |= B_ASYNC; 1782 newbp->b_flags &= ~B_INVAL; 1783 1784 #ifdef SOFTUPDATES 1785 /* move over the dependencies */ 1786 if (!LIST_EMPTY(&bp->b_dep)) 1787 softdep_move_dependencies(bp, newbp); 1788 #endif 1789 1790 /* 1791 * Initiate write on the copy, release the original to 1792 * the B_LOCKED queue so that it cannot go away until 1793 * the background write completes. If not locked it could go 1794 * away and then be reconstituted while it was being written. 1795 * If the reconstituted buffer were written, we could end up 1796 * with two background copies being written at the same time. 1797 */ 1798 bqrelse(bp); 1799 bp = newbp; 1800 } 1801 1802 /* Let the normal bufwrite do the rest for us */ 1803 return (bufwrite(bp)); 1804 } 1805 1806 1807 static void 1808 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1809 { 1810 struct vnode *vp; 1811 int error; 1812 struct buf *tbp; 1813 1814 vp = bo->__bo_vnode; 1815 if (bp->b_iocmd == BIO_WRITE) { 1816 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 1817 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 1818 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 1819 panic("ffs_geom_strategy: bad I/O"); 1820 bp->b_flags &= ~B_VALIDSUSPWRT; 1821 if ((vp->v_vflag & VV_COPYONWRITE) && 1822 vp->v_rdev->si_snapdata != NULL) { 1823 if ((bp->b_flags & B_CLUSTER) != 0) { 1824 runningbufwakeup(bp); 1825 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 1826 b_cluster.cluster_entry) { 1827 error = ffs_copyonwrite(vp, tbp); 1828 if (error != 0 && 1829 error != EOPNOTSUPP) { 1830 bp->b_error = error; 1831 bp->b_ioflags |= BIO_ERROR; 1832 bufdone(bp); 1833 return; 1834 } 1835 } 1836 bp->b_runningbufspace = bp->b_bufsize; 1837 atomic_add_int(&runningbufspace, 1838 bp->b_runningbufspace); 1839 } else { 1840 error = ffs_copyonwrite(vp, bp); 1841 if (error != 0 && error != EOPNOTSUPP) { 1842 bp->b_error = error; 1843 bp->b_ioflags |= BIO_ERROR; 1844 bufdone(bp); 1845 return; 1846 } 1847 } 1848 } 1849 #ifdef SOFTUPDATES 1850 if ((bp->b_flags & B_CLUSTER) != 0) { 1851 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 1852 b_cluster.cluster_entry) { 1853 if (!LIST_EMPTY(&tbp->b_dep)) 1854 buf_start(tbp); 1855 } 1856 } else { 1857 if (!LIST_EMPTY(&bp->b_dep)) 1858 buf_start(bp); 1859 } 1860 1861 #endif 1862 } 1863 g_vfs_strategy(bo, bp); 1864 } 1865