ffs_vfsops.c revision 167737
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: head/sys/ufs/ffs/ffs_vfsops.c 167737 2007-03-20 10:51:45Z kib $"); 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 74static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 75 76static int ffs_reload(struct mount *, struct thread *); 77static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 78static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 79 ufs2_daddr_t); 80static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 81static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 82static vfs_init_t ffs_init; 83static vfs_uninit_t ffs_uninit; 84static vfs_extattrctl_t ffs_extattrctl; 85static vfs_cmount_t ffs_cmount; 86static vfs_unmount_t ffs_unmount; 87static vfs_mount_t ffs_mount; 88static vfs_statfs_t ffs_statfs; 89static vfs_fhtovp_t ffs_fhtovp; 90static vfs_sync_t ffs_sync; 91 92static 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 107VFS_SET(ufs_vfsops, ufs, 0); 108MODULE_VERSION(ufs, 1); 109 110static b_strategy_t ffs_geom_strategy; 111static b_write_t ffs_bufwrite; 112 113static 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 125static const char *ffs_opts[] = { "acls", "async", "atime", "clusterr", 126 "clusterw", "exec", "export", "force", "from", "multilabel", 127 "snapshot", "suid", "suiddir", "symfollow", "sync", 128 "union", NULL }; 129 130static int 131ffs_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, "async", NULL, NULL) == 0) 166 mntorflags |= MNT_ASYNC; 167 168 if (vfs_getopt(mp->mnt_optnew, "force", NULL, NULL) == 0) 169 mntorflags |= MNT_FORCE; 170 171 if (vfs_getopt(mp->mnt_optnew, "multilabel", NULL, NULL) == 0) 172 mntorflags |= MNT_MULTILABEL; 173 174 if (vfs_getopt(mp->mnt_optnew, "noasync", NULL, NULL) == 0) 175 mntandnotflags |= MNT_ASYNC; 176 177 if (vfs_getopt(mp->mnt_optnew, "noatime", NULL, NULL) == 0) 178 mntorflags |= MNT_NOATIME; 179 180 if (vfs_getopt(mp->mnt_optnew, "noclusterr", NULL, NULL) == 0) 181 mntorflags |= MNT_NOCLUSTERR; 182 183 if (vfs_getopt(mp->mnt_optnew, "noclusterw", NULL, NULL) == 0) 184 mntorflags |= MNT_NOCLUSTERW; 185 186 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) 187 mntorflags |= MNT_SNAPSHOT; 188 189 MNT_ILOCK(mp); 190 mp->mnt_flag = (mp->mnt_flag | mntorflags) & ~mntandnotflags; 191 MNT_IUNLOCK(mp); 192 /* 193 * If updating, check whether changing from read-only to 194 * read/write; if there is no device name, that's all we do. 195 */ 196 if (mp->mnt_flag & MNT_UPDATE) { 197 ump = VFSTOUFS(mp); 198 fs = ump->um_fs; 199 devvp = ump->um_devvp; 200 if (fs->fs_ronly == 0 && 201 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 202 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 203 return (error); 204 /* 205 * Flush any dirty data. 206 */ 207 if ((error = ffs_sync(mp, MNT_WAIT, td)) != 0) { 208 vn_finished_write(mp); 209 return (error); 210 } 211 /* 212 * Check for and optionally get rid of files open 213 * for writing. 214 */ 215 flags = WRITECLOSE; 216 if (mp->mnt_flag & MNT_FORCE) 217 flags |= FORCECLOSE; 218 if (mp->mnt_flag & MNT_SOFTDEP) { 219 error = softdep_flushfiles(mp, flags, td); 220 } else { 221 error = ffs_flushfiles(mp, flags, td); 222 } 223 if (error) { 224 vn_finished_write(mp); 225 return (error); 226 } 227 if (fs->fs_pendingblocks != 0 || 228 fs->fs_pendinginodes != 0) { 229 printf("%s: %s: blocks %jd files %d\n", 230 fs->fs_fsmnt, "update error", 231 (intmax_t)fs->fs_pendingblocks, 232 fs->fs_pendinginodes); 233 fs->fs_pendingblocks = 0; 234 fs->fs_pendinginodes = 0; 235 } 236 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 237 fs->fs_clean = 1; 238 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 239 fs->fs_ronly = 0; 240 fs->fs_clean = 0; 241 vn_finished_write(mp); 242 return (error); 243 } 244 vn_finished_write(mp); 245 DROP_GIANT(); 246 g_topology_lock(); 247 g_access(ump->um_cp, 0, -1, 0); 248 g_topology_unlock(); 249 PICKUP_GIANT(); 250 fs->fs_ronly = 1; 251 MNT_ILOCK(mp); 252 mp->mnt_flag |= MNT_RDONLY; 253 MNT_IUNLOCK(mp); 254 } 255 if ((mp->mnt_flag & MNT_RELOAD) && 256 (error = ffs_reload(mp, td)) != 0) 257 return (error); 258 if (fs->fs_ronly && 259 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 260 /* 261 * If upgrade to read-write by non-root, then verify 262 * that user has necessary permissions on the device. 263 */ 264 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 265 error = VOP_ACCESS(devvp, VREAD | VWRITE, 266 td->td_ucred, td); 267 if (error) 268 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 269 if (error) { 270 VOP_UNLOCK(devvp, 0, td); 271 return (error); 272 } 273 VOP_UNLOCK(devvp, 0, td); 274 fs->fs_flags &= ~FS_UNCLEAN; 275 if (fs->fs_clean == 0) { 276 fs->fs_flags |= FS_UNCLEAN; 277 if ((mp->mnt_flag & MNT_FORCE) || 278 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 279 (fs->fs_flags & FS_DOSOFTDEP))) { 280 printf("WARNING: %s was not %s\n", 281 fs->fs_fsmnt, "properly dismounted"); 282 } else { 283 printf( 284"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 285 fs->fs_fsmnt); 286 return (EPERM); 287 } 288 } 289 DROP_GIANT(); 290 g_topology_lock(); 291 /* 292 * If we're the root device, we may not have an E count 293 * yet, get it now. 294 */ 295 if (ump->um_cp->ace == 0) 296 error = g_access(ump->um_cp, 0, 1, 1); 297 else 298 error = g_access(ump->um_cp, 0, 1, 0); 299 g_topology_unlock(); 300 PICKUP_GIANT(); 301 if (error) 302 return (error); 303 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 304 return (error); 305 fs->fs_ronly = 0; 306 MNT_ILOCK(mp); 307 mp->mnt_flag &= ~MNT_RDONLY; 308 MNT_IUNLOCK(mp); 309 fs->fs_clean = 0; 310 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 311 vn_finished_write(mp); 312 return (error); 313 } 314 /* check to see if we need to start softdep */ 315 if ((fs->fs_flags & FS_DOSOFTDEP) && 316 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 317 vn_finished_write(mp); 318 return (error); 319 } 320 if (fs->fs_snapinum[0] != 0) 321 ffs_snapshot_mount(mp); 322 vn_finished_write(mp); 323 } 324 /* 325 * Soft updates is incompatible with "async", 326 * so if we are doing softupdates stop the user 327 * from setting the async flag in an update. 328 * Softdep_mount() clears it in an initial mount 329 * or ro->rw remount. 330 */ 331 if (mp->mnt_flag & MNT_SOFTDEP) { 332 /* XXX: Reset too late ? */ 333 MNT_ILOCK(mp); 334 mp->mnt_flag &= ~MNT_ASYNC; 335 MNT_IUNLOCK(mp); 336 } 337 /* 338 * Keep MNT_ACLS flag if it is stored in superblock. 339 */ 340 if ((fs->fs_flags & FS_ACLS) != 0) { 341 /* XXX: Set too late ? */ 342 MNT_ILOCK(mp); 343 mp->mnt_flag |= MNT_ACLS; 344 MNT_IUNLOCK(mp); 345 } 346 347 /* 348 * If this is a snapshot request, take the snapshot. 349 */ 350 if (mp->mnt_flag & MNT_SNAPSHOT) 351 return (ffs_snapshot(mp, fspec)); 352 } 353 354 /* 355 * Not an update, or updating the name: look up the name 356 * and verify that it refers to a sensible disk device. 357 */ 358 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 359 if ((error = namei(&ndp)) != 0) 360 return (error); 361 NDFREE(&ndp, NDF_ONLY_PNBUF); 362 devvp = ndp.ni_vp; 363 if (!vn_isdisk(devvp, &error)) { 364 vput(devvp); 365 return (error); 366 } 367 368 /* 369 * If mount by non-root, then verify that user has necessary 370 * permissions on the device. 371 */ 372 accessmode = VREAD; 373 if ((mp->mnt_flag & MNT_RDONLY) == 0) 374 accessmode |= VWRITE; 375 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 376 if (error) 377 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 378 if (error) { 379 vput(devvp); 380 return (error); 381 } 382 383 if (mp->mnt_flag & MNT_UPDATE) { 384 /* 385 * Update only 386 * 387 * If it's not the same vnode, or at least the same device 388 * then it's not correct. 389 */ 390 391 if (devvp->v_rdev != ump->um_devvp->v_rdev) 392 error = EINVAL; /* needs translation */ 393 vput(devvp); 394 if (error) 395 return (error); 396 } else { 397 /* 398 * New mount 399 * 400 * We need the name for the mount point (also used for 401 * "last mounted on") copied in. If an error occurs, 402 * the mount point is discarded by the upper level code. 403 * Note that vfs_mount() populates f_mntonname for us. 404 */ 405 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 406 vrele(devvp); 407 return (error); 408 } 409 } 410 vfs_mountedfrom(mp, fspec); 411 return (0); 412} 413 414/* 415 * Compatibility with old mount system call. 416 */ 417 418static int 419ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 420{ 421 struct ufs_args args; 422 int error; 423 424 if (data == NULL) 425 return (EINVAL); 426 error = copyin(data, &args, sizeof args); 427 if (error) 428 return (error); 429 430 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 431 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 432 error = kernel_mount(ma, flags); 433 434 return (error); 435} 436 437/* 438 * Reload all incore data for a filesystem (used after running fsck on 439 * the root filesystem and finding things to fix). The filesystem must 440 * be mounted read-only. 441 * 442 * Things to do to update the mount: 443 * 1) invalidate all cached meta-data. 444 * 2) re-read superblock from disk. 445 * 3) re-read summary information from disk. 446 * 4) invalidate all inactive vnodes. 447 * 5) invalidate all cached file data. 448 * 6) re-read inode data for all active vnodes. 449 */ 450static int 451ffs_reload(struct mount *mp, struct thread *td) 452{ 453 struct vnode *vp, *mvp, *devvp; 454 struct inode *ip; 455 void *space; 456 struct buf *bp; 457 struct fs *fs, *newfs; 458 struct ufsmount *ump; 459 ufs2_daddr_t sblockloc; 460 int i, blks, size, error; 461 int32_t *lp; 462 463 if ((mp->mnt_flag & MNT_RDONLY) == 0) 464 return (EINVAL); 465 ump = VFSTOUFS(mp); 466 /* 467 * Step 1: invalidate all cached meta-data. 468 */ 469 devvp = VFSTOUFS(mp)->um_devvp; 470 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 471 if (vinvalbuf(devvp, 0, td, 0, 0) != 0) 472 panic("ffs_reload: dirty1"); 473 VOP_UNLOCK(devvp, 0, td); 474 475 /* 476 * Step 2: re-read superblock from disk. 477 */ 478 fs = VFSTOUFS(mp)->um_fs; 479 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 480 NOCRED, &bp)) != 0) 481 return (error); 482 newfs = (struct fs *)bp->b_data; 483 if ((newfs->fs_magic != FS_UFS1_MAGIC && 484 newfs->fs_magic != FS_UFS2_MAGIC) || 485 newfs->fs_bsize > MAXBSIZE || 486 newfs->fs_bsize < sizeof(struct fs)) { 487 brelse(bp); 488 return (EIO); /* XXX needs translation */ 489 } 490 /* 491 * Copy pointer fields back into superblock before copying in XXX 492 * new superblock. These should really be in the ufsmount. XXX 493 * Note that important parameters (eg fs_ncg) are unchanged. 494 */ 495 newfs->fs_csp = fs->fs_csp; 496 newfs->fs_maxcluster = fs->fs_maxcluster; 497 newfs->fs_contigdirs = fs->fs_contigdirs; 498 newfs->fs_active = fs->fs_active; 499 /* The file system is still read-only. */ 500 newfs->fs_ronly = 1; 501 sblockloc = fs->fs_sblockloc; 502 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 503 brelse(bp); 504 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 505 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 506 UFS_LOCK(ump); 507 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 508 printf("%s: reload pending error: blocks %jd files %d\n", 509 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 510 fs->fs_pendinginodes); 511 fs->fs_pendingblocks = 0; 512 fs->fs_pendinginodes = 0; 513 } 514 UFS_UNLOCK(ump); 515 516 /* 517 * Step 3: re-read summary information from disk. 518 */ 519 blks = howmany(fs->fs_cssize, fs->fs_fsize); 520 space = fs->fs_csp; 521 for (i = 0; i < blks; i += fs->fs_frag) { 522 size = fs->fs_bsize; 523 if (i + fs->fs_frag > blks) 524 size = (blks - i) * fs->fs_fsize; 525 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 526 NOCRED, &bp); 527 if (error) 528 return (error); 529 bcopy(bp->b_data, space, (u_int)size); 530 space = (char *)space + size; 531 brelse(bp); 532 } 533 /* 534 * We no longer know anything about clusters per cylinder group. 535 */ 536 if (fs->fs_contigsumsize > 0) { 537 lp = fs->fs_maxcluster; 538 for (i = 0; i < fs->fs_ncg; i++) 539 *lp++ = fs->fs_contigsumsize; 540 } 541 542loop: 543 MNT_ILOCK(mp); 544 MNT_VNODE_FOREACH(vp, mp, mvp) { 545 VI_LOCK(vp); 546 if (vp->v_iflag & VI_DOOMED) { 547 VI_UNLOCK(vp); 548 continue; 549 } 550 MNT_IUNLOCK(mp); 551 /* 552 * Step 4: invalidate all cached file data. 553 */ 554 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 555 MNT_VNODE_FOREACH_ABORT(mp, mvp); 556 goto loop; 557 } 558 if (vinvalbuf(vp, 0, td, 0, 0)) 559 panic("ffs_reload: dirty2"); 560 /* 561 * Step 5: re-read inode data for all active vnodes. 562 */ 563 ip = VTOI(vp); 564 error = 565 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 566 (int)fs->fs_bsize, NOCRED, &bp); 567 if (error) { 568 VOP_UNLOCK(vp, 0, td); 569 vrele(vp); 570 MNT_VNODE_FOREACH_ABORT(mp, mvp); 571 return (error); 572 } 573 ffs_load_inode(bp, ip, fs, ip->i_number); 574 ip->i_effnlink = ip->i_nlink; 575 brelse(bp); 576 VOP_UNLOCK(vp, 0, td); 577 vrele(vp); 578 MNT_ILOCK(mp); 579 } 580 MNT_IUNLOCK(mp); 581 return (0); 582} 583 584/* 585 * Possible superblock locations ordered from most to least likely. 586 */ 587static int sblock_try[] = SBLOCKSEARCH; 588 589/* 590 * Common code for mount and mountroot 591 */ 592static int 593ffs_mountfs(devvp, mp, td) 594 struct vnode *devvp; 595 struct mount *mp; 596 struct thread *td; 597{ 598 struct ufsmount *ump; 599 struct buf *bp; 600 struct fs *fs; 601 struct cdev *dev; 602 void *space; 603 ufs2_daddr_t sblockloc; 604 int error, i, blks, size, ronly; 605 int32_t *lp; 606 struct ucred *cred; 607 struct g_consumer *cp; 608 struct mount *nmp; 609 610 dev = devvp->v_rdev; 611 cred = td ? td->td_ucred : NOCRED; 612 613 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 614 DROP_GIANT(); 615 g_topology_lock(); 616 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 617 618 /* 619 * If we are a root mount, drop the E flag so fsck can do its magic. 620 * We will pick it up again when we remount R/W. 621 */ 622 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 623 error = g_access(cp, 0, 0, -1); 624 g_topology_unlock(); 625 PICKUP_GIANT(); 626 VOP_UNLOCK(devvp, 0, td); 627 if (error) 628 return (error); 629 if (devvp->v_rdev->si_iosize_max != 0) 630 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 631 if (mp->mnt_iosize_max > MAXPHYS) 632 mp->mnt_iosize_max = MAXPHYS; 633 634 devvp->v_bufobj.bo_private = cp; 635 devvp->v_bufobj.bo_ops = &ffs_ops; 636 637 bp = NULL; 638 ump = NULL; 639 fs = NULL; 640 sblockloc = 0; 641 /* 642 * Try reading the superblock in each of its possible locations. 643 */ 644 for (i = 0; sblock_try[i] != -1; i++) { 645 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 646 error = EINVAL; 647 vfs_mount_error(mp, 648 "Invalid sectorsize %d for superblock size %d", 649 cp->provider->sectorsize, SBLOCKSIZE); 650 goto out; 651 } 652 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 653 cred, &bp)) != 0) 654 goto out; 655 fs = (struct fs *)bp->b_data; 656 sblockloc = sblock_try[i]; 657 if ((fs->fs_magic == FS_UFS1_MAGIC || 658 (fs->fs_magic == FS_UFS2_MAGIC && 659 (fs->fs_sblockloc == sblockloc || 660 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 661 fs->fs_bsize <= MAXBSIZE && 662 fs->fs_bsize >= sizeof(struct fs)) 663 break; 664 brelse(bp); 665 bp = NULL; 666 } 667 if (sblock_try[i] == -1) { 668 error = EINVAL; /* XXX needs translation */ 669 goto out; 670 } 671 fs->fs_fmod = 0; 672 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 673 fs->fs_flags &= ~FS_UNCLEAN; 674 if (fs->fs_clean == 0) { 675 fs->fs_flags |= FS_UNCLEAN; 676 if (ronly || (mp->mnt_flag & MNT_FORCE) || 677 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 678 (fs->fs_flags & FS_DOSOFTDEP))) { 679 printf( 680"WARNING: %s was not properly dismounted\n", 681 fs->fs_fsmnt); 682 } else { 683 printf( 684"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 685 fs->fs_fsmnt); 686 error = EPERM; 687 goto out; 688 } 689 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 690 (mp->mnt_flag & MNT_FORCE)) { 691 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 692 (intmax_t)fs->fs_pendingblocks, 693 fs->fs_pendinginodes); 694 fs->fs_pendingblocks = 0; 695 fs->fs_pendinginodes = 0; 696 } 697 } 698 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 699 printf("%s: mount pending error: blocks %jd files %d\n", 700 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 701 fs->fs_pendinginodes); 702 fs->fs_pendingblocks = 0; 703 fs->fs_pendinginodes = 0; 704 } 705 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 706#ifdef UFS_GJOURNAL 707 /* 708 * Get journal provider name. 709 */ 710 size = 1024; 711 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 712 if (g_io_getattr("GJOURNAL::provider", cp, &size, 713 mp->mnt_gjprovider) == 0) { 714 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 715 M_UFSMNT, M_WAITOK); 716 MNT_ILOCK(mp); 717 mp->mnt_flag |= MNT_GJOURNAL; 718 MNT_IUNLOCK(mp); 719 } else { 720 printf( 721"WARNING: %s: GJOURNAL flag on fs but no gjournal provider below\n", 722 mp->mnt_stat.f_mntonname); 723 free(mp->mnt_gjprovider, M_UFSMNT); 724 mp->mnt_gjprovider = NULL; 725 } 726#else 727 printf( 728"WARNING: %s: GJOURNAL flag on fs but no UFS_GJOURNAL support\n", 729 mp->mnt_stat.f_mntonname); 730#endif 731 } else { 732 mp->mnt_gjprovider = NULL; 733 } 734 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 735 ump->um_cp = cp; 736 ump->um_bo = &devvp->v_bufobj; 737 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 738 if (fs->fs_magic == FS_UFS1_MAGIC) { 739 ump->um_fstype = UFS1; 740 ump->um_balloc = ffs_balloc_ufs1; 741 } else { 742 ump->um_fstype = UFS2; 743 ump->um_balloc = ffs_balloc_ufs2; 744 } 745 ump->um_blkatoff = ffs_blkatoff; 746 ump->um_truncate = ffs_truncate; 747 ump->um_update = ffs_update; 748 ump->um_valloc = ffs_valloc; 749 ump->um_vfree = ffs_vfree; 750 ump->um_ifree = ffs_ifree; 751 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 752 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 753 if (fs->fs_sbsize < SBLOCKSIZE) 754 bp->b_flags |= B_INVAL | B_NOCACHE; 755 brelse(bp); 756 bp = NULL; 757 fs = ump->um_fs; 758 ffs_oldfscompat_read(fs, ump, sblockloc); 759 fs->fs_ronly = ronly; 760 size = fs->fs_cssize; 761 blks = howmany(size, fs->fs_fsize); 762 if (fs->fs_contigsumsize > 0) 763 size += fs->fs_ncg * sizeof(int32_t); 764 size += fs->fs_ncg * sizeof(u_int8_t); 765 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 766 fs->fs_csp = space; 767 for (i = 0; i < blks; i += fs->fs_frag) { 768 size = fs->fs_bsize; 769 if (i + fs->fs_frag > blks) 770 size = (blks - i) * fs->fs_fsize; 771 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 772 cred, &bp)) != 0) { 773 free(fs->fs_csp, M_UFSMNT); 774 goto out; 775 } 776 bcopy(bp->b_data, space, (u_int)size); 777 space = (char *)space + size; 778 brelse(bp); 779 bp = NULL; 780 } 781 if (fs->fs_contigsumsize > 0) { 782 fs->fs_maxcluster = lp = space; 783 for (i = 0; i < fs->fs_ncg; i++) 784 *lp++ = fs->fs_contigsumsize; 785 space = lp; 786 } 787 size = fs->fs_ncg * sizeof(u_int8_t); 788 fs->fs_contigdirs = (u_int8_t *)space; 789 bzero(fs->fs_contigdirs, size); 790 fs->fs_active = NULL; 791 mp->mnt_data = (qaddr_t)ump; 792 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 793 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 794 nmp = NULL; 795 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 796 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 797 if (nmp) 798 vfs_rel(nmp); 799 vfs_getnewfsid(mp); 800 } 801 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 802 MNT_ILOCK(mp); 803 mp->mnt_flag |= MNT_LOCAL; 804 MNT_IUNLOCK(mp); 805 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 806#ifdef MAC 807 MNT_ILOCK(mp); 808 mp->mnt_flag |= MNT_MULTILABEL; 809 MNT_IUNLOCK(mp); 810#else 811 printf( 812"WARNING: %s: multilabel flag on fs but no MAC support\n", 813 mp->mnt_stat.f_mntonname); 814#endif 815 } 816 if ((fs->fs_flags & FS_ACLS) != 0) { 817#ifdef UFS_ACL 818 MNT_ILOCK(mp); 819 mp->mnt_flag |= MNT_ACLS; 820 MNT_IUNLOCK(mp); 821#else 822 printf( 823"WARNING: %s: ACLs flag on fs but no ACLs support\n", 824 mp->mnt_stat.f_mntonname); 825#endif 826 } 827 ump->um_mountp = mp; 828 ump->um_dev = dev; 829 ump->um_devvp = devvp; 830 ump->um_nindir = fs->fs_nindir; 831 ump->um_bptrtodb = fs->fs_fsbtodb; 832 ump->um_seqinc = fs->fs_frag; 833 for (i = 0; i < MAXQUOTAS; i++) 834 ump->um_quotas[i] = NULLVP; 835#ifdef UFS_EXTATTR 836 ufs_extattr_uepm_init(&ump->um_extattr); 837#endif 838 /* 839 * Set FS local "last mounted on" information (NULL pad) 840 */ 841 bzero(fs->fs_fsmnt, MAXMNTLEN); 842 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 843 844 if( mp->mnt_flag & MNT_ROOTFS) { 845 /* 846 * Root mount; update timestamp in mount structure. 847 * this will be used by the common root mount code 848 * to update the system clock. 849 */ 850 mp->mnt_time = fs->fs_time; 851 } 852 853 if (ronly == 0) { 854 if ((fs->fs_flags & FS_DOSOFTDEP) && 855 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 856 free(fs->fs_csp, M_UFSMNT); 857 goto out; 858 } 859 if (fs->fs_snapinum[0] != 0) 860 ffs_snapshot_mount(mp); 861 fs->fs_fmod = 1; 862 fs->fs_clean = 0; 863 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 864 } 865 /* 866 * Initialize filesystem stat information in mount struct. 867 */ 868#ifdef UFS_EXTATTR 869#ifdef UFS_EXTATTR_AUTOSTART 870 /* 871 * 872 * Auto-starting does the following: 873 * - check for /.attribute in the fs, and extattr_start if so 874 * - for each file in .attribute, enable that file with 875 * an attribute of the same name. 876 * Not clear how to report errors -- probably eat them. 877 * This would all happen while the filesystem was busy/not 878 * available, so would effectively be "atomic". 879 */ 880 (void) ufs_extattr_autostart(mp, td); 881#endif /* !UFS_EXTATTR_AUTOSTART */ 882#endif /* !UFS_EXTATTR */ 883 MNT_ILOCK(mp); 884 mp->mnt_kern_flag |= MNTK_MPSAFE; 885 MNT_IUNLOCK(mp); 886 return (0); 887out: 888 if (bp) 889 brelse(bp); 890 if (cp != NULL) { 891 DROP_GIANT(); 892 g_topology_lock(); 893 g_vfs_close(cp, td); 894 g_topology_unlock(); 895 PICKUP_GIANT(); 896 } 897 if (ump) { 898 mtx_destroy(UFS_MTX(ump)); 899 if (mp->mnt_gjprovider != NULL) { 900 free(mp->mnt_gjprovider, M_UFSMNT); 901 mp->mnt_gjprovider = NULL; 902 } 903 free(ump->um_fs, M_UFSMNT); 904 free(ump, M_UFSMNT); 905 mp->mnt_data = (qaddr_t)0; 906 } 907 return (error); 908} 909 910#include <sys/sysctl.h> 911static int bigcgs = 0; 912SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 913 914/* 915 * Sanity checks for loading old filesystem superblocks. 916 * See ffs_oldfscompat_write below for unwound actions. 917 * 918 * XXX - Parts get retired eventually. 919 * Unfortunately new bits get added. 920 */ 921static void 922ffs_oldfscompat_read(fs, ump, sblockloc) 923 struct fs *fs; 924 struct ufsmount *ump; 925 ufs2_daddr_t sblockloc; 926{ 927 off_t maxfilesize; 928 929 /* 930 * If not yet done, update fs_flags location and value of fs_sblockloc. 931 */ 932 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 933 fs->fs_flags = fs->fs_old_flags; 934 fs->fs_old_flags |= FS_FLAGS_UPDATED; 935 fs->fs_sblockloc = sblockloc; 936 } 937 /* 938 * If not yet done, update UFS1 superblock with new wider fields. 939 */ 940 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 941 fs->fs_maxbsize = fs->fs_bsize; 942 fs->fs_time = fs->fs_old_time; 943 fs->fs_size = fs->fs_old_size; 944 fs->fs_dsize = fs->fs_old_dsize; 945 fs->fs_csaddr = fs->fs_old_csaddr; 946 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 947 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 948 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 949 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 950 } 951 if (fs->fs_magic == FS_UFS1_MAGIC && 952 fs->fs_old_inodefmt < FS_44INODEFMT) { 953 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 954 fs->fs_qbmask = ~fs->fs_bmask; 955 fs->fs_qfmask = ~fs->fs_fmask; 956 } 957 if (fs->fs_magic == FS_UFS1_MAGIC) { 958 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 959 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 960 if (fs->fs_maxfilesize > maxfilesize) 961 fs->fs_maxfilesize = maxfilesize; 962 } 963 /* Compatibility for old filesystems */ 964 if (fs->fs_avgfilesize <= 0) 965 fs->fs_avgfilesize = AVFILESIZ; 966 if (fs->fs_avgfpdir <= 0) 967 fs->fs_avgfpdir = AFPDIR; 968 if (bigcgs) { 969 fs->fs_save_cgsize = fs->fs_cgsize; 970 fs->fs_cgsize = fs->fs_bsize; 971 } 972} 973 974/* 975 * Unwinding superblock updates for old filesystems. 976 * See ffs_oldfscompat_read above for details. 977 * 978 * XXX - Parts get retired eventually. 979 * Unfortunately new bits get added. 980 */ 981static void 982ffs_oldfscompat_write(fs, ump) 983 struct fs *fs; 984 struct ufsmount *ump; 985{ 986 987 /* 988 * Copy back UFS2 updated fields that UFS1 inspects. 989 */ 990 if (fs->fs_magic == FS_UFS1_MAGIC) { 991 fs->fs_old_time = fs->fs_time; 992 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 993 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 994 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 995 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 996 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 997 } 998 if (bigcgs) { 999 fs->fs_cgsize = fs->fs_save_cgsize; 1000 fs->fs_save_cgsize = 0; 1001 } 1002} 1003 1004/* 1005 * unmount system call 1006 */ 1007static int 1008ffs_unmount(mp, mntflags, td) 1009 struct mount *mp; 1010 int mntflags; 1011 struct thread *td; 1012{ 1013 struct ufsmount *ump = VFSTOUFS(mp); 1014 struct fs *fs; 1015 int error, flags; 1016 1017 flags = 0; 1018 if (mntflags & MNT_FORCE) { 1019 flags |= FORCECLOSE; 1020 } 1021#ifdef UFS_EXTATTR 1022 if ((error = ufs_extattr_stop(mp, td))) { 1023 if (error != EOPNOTSUPP) 1024 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 1025 error); 1026 } else { 1027 ufs_extattr_uepm_destroy(&ump->um_extattr); 1028 } 1029#endif 1030 if (mp->mnt_flag & MNT_SOFTDEP) { 1031 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 1032 return (error); 1033 } else { 1034 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 1035 return (error); 1036 } 1037 fs = ump->um_fs; 1038 UFS_LOCK(ump); 1039 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1040 printf("%s: unmount pending error: blocks %jd files %d\n", 1041 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1042 fs->fs_pendinginodes); 1043 fs->fs_pendingblocks = 0; 1044 fs->fs_pendinginodes = 0; 1045 } 1046 UFS_UNLOCK(ump); 1047 if (fs->fs_ronly == 0) { 1048 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1049 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1050 if (error) { 1051 fs->fs_clean = 0; 1052 return (error); 1053 } 1054 } 1055 DROP_GIANT(); 1056 g_topology_lock(); 1057 g_vfs_close(ump->um_cp, td); 1058 g_topology_unlock(); 1059 PICKUP_GIANT(); 1060 vrele(ump->um_devvp); 1061 mtx_destroy(UFS_MTX(ump)); 1062 if (mp->mnt_gjprovider != NULL) { 1063 free(mp->mnt_gjprovider, M_UFSMNT); 1064 mp->mnt_gjprovider = NULL; 1065 } 1066 free(fs->fs_csp, M_UFSMNT); 1067 free(fs, M_UFSMNT); 1068 free(ump, M_UFSMNT); 1069 mp->mnt_data = (qaddr_t)0; 1070 MNT_ILOCK(mp); 1071 mp->mnt_flag &= ~MNT_LOCAL; 1072 MNT_IUNLOCK(mp); 1073 return (error); 1074} 1075 1076/* 1077 * Flush out all the files in a filesystem. 1078 */ 1079int 1080ffs_flushfiles(mp, flags, td) 1081 struct mount *mp; 1082 int flags; 1083 struct thread *td; 1084{ 1085 struct ufsmount *ump; 1086 int error; 1087 1088 ump = VFSTOUFS(mp); 1089#ifdef QUOTA 1090 if (mp->mnt_flag & MNT_QUOTA) { 1091 int i; 1092 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1093 if (error) 1094 return (error); 1095 for (i = 0; i < MAXQUOTAS; i++) { 1096 quotaoff(td, mp, i); 1097 } 1098 /* 1099 * Here we fall through to vflush again to ensure 1100 * that we have gotten rid of all the system vnodes. 1101 */ 1102 } 1103#endif 1104 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1105 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1106 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1107 return (error); 1108 ffs_snapshot_unmount(mp); 1109 flags |= FORCECLOSE; 1110 /* 1111 * Here we fall through to vflush again to ensure 1112 * that we have gotten rid of all the system vnodes. 1113 */ 1114 } 1115 /* 1116 * Flush all the files. 1117 */ 1118 if ((error = vflush(mp, 0, flags, td)) != 0) 1119 return (error); 1120 /* 1121 * Flush filesystem metadata. 1122 */ 1123 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1124 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1125 VOP_UNLOCK(ump->um_devvp, 0, td); 1126 return (error); 1127} 1128 1129/* 1130 * Get filesystem statistics. 1131 */ 1132static int 1133ffs_statfs(mp, sbp, td) 1134 struct mount *mp; 1135 struct statfs *sbp; 1136 struct thread *td; 1137{ 1138 struct ufsmount *ump; 1139 struct fs *fs; 1140 1141 ump = VFSTOUFS(mp); 1142 fs = ump->um_fs; 1143 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1144 panic("ffs_statfs"); 1145 sbp->f_version = STATFS_VERSION; 1146 sbp->f_bsize = fs->fs_fsize; 1147 sbp->f_iosize = fs->fs_bsize; 1148 sbp->f_blocks = fs->fs_dsize; 1149 UFS_LOCK(ump); 1150 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1151 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1152 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1153 dbtofsb(fs, fs->fs_pendingblocks); 1154 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1155 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1156 UFS_UNLOCK(ump); 1157 sbp->f_namemax = NAME_MAX; 1158 return (0); 1159} 1160 1161/* 1162 * Go through the disk queues to initiate sandbagged IO; 1163 * go through the inodes to write those that have been modified; 1164 * initiate the writing of the super block if it has been modified. 1165 * 1166 * Note: we are always called with the filesystem marked `MPBUSY'. 1167 */ 1168static int 1169ffs_sync(mp, waitfor, td) 1170 struct mount *mp; 1171 int waitfor; 1172 struct thread *td; 1173{ 1174 struct vnode *mvp, *vp, *devvp; 1175 struct inode *ip; 1176 struct ufsmount *ump = VFSTOUFS(mp); 1177 struct fs *fs; 1178 int error, count, wait, lockreq, allerror = 0; 1179 int suspend; 1180 int suspended; 1181 int secondary_writes; 1182 int secondary_accwrites; 1183 int softdep_deps; 1184 int softdep_accdeps; 1185 struct bufobj *bo; 1186 1187 fs = ump->um_fs; 1188 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1189 printf("fs = %s\n", fs->fs_fsmnt); 1190 panic("ffs_sync: rofs mod"); 1191 } 1192 /* 1193 * Write back each (modified) inode. 1194 */ 1195 wait = 0; 1196 suspend = 0; 1197 suspended = 0; 1198 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1199 if (waitfor == MNT_SUSPEND) { 1200 suspend = 1; 1201 waitfor = MNT_WAIT; 1202 } 1203 if (waitfor == MNT_WAIT) { 1204 wait = 1; 1205 lockreq = LK_EXCLUSIVE; 1206 } 1207 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1208 MNT_ILOCK(mp); 1209loop: 1210 /* Grab snapshot of secondary write counts */ 1211 secondary_writes = mp->mnt_secondary_writes; 1212 secondary_accwrites = mp->mnt_secondary_accwrites; 1213 1214 /* Grab snapshot of softdep dependency counts */ 1215 MNT_IUNLOCK(mp); 1216 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1217 MNT_ILOCK(mp); 1218 1219 MNT_VNODE_FOREACH(vp, mp, mvp) { 1220 /* 1221 * Depend on the mntvnode_slock to keep things stable enough 1222 * for a quick test. Since there might be hundreds of 1223 * thousands of vnodes, we cannot afford even a subroutine 1224 * call unless there's a good chance that we have work to do. 1225 */ 1226 VI_LOCK(vp); 1227 if (vp->v_iflag & VI_DOOMED) { 1228 VI_UNLOCK(vp); 1229 continue; 1230 } 1231 ip = VTOI(vp); 1232 if (vp->v_type == VNON || ((ip->i_flag & 1233 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1234 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1235 VI_UNLOCK(vp); 1236 continue; 1237 } 1238 MNT_IUNLOCK(mp); 1239 if ((error = vget(vp, lockreq, td)) != 0) { 1240 MNT_ILOCK(mp); 1241 if (error == ENOENT || error == ENOLCK) { 1242 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1243 goto loop; 1244 } 1245 continue; 1246 } 1247 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1248 allerror = error; 1249 vput(vp); 1250 MNT_ILOCK(mp); 1251 } 1252 MNT_IUNLOCK(mp); 1253 /* 1254 * Force stale filesystem control information to be flushed. 1255 */ 1256 if (waitfor == MNT_WAIT) { 1257 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1258 allerror = error; 1259 /* Flushed work items may create new vnodes to clean */ 1260 if (allerror == 0 && count) { 1261 MNT_ILOCK(mp); 1262 goto loop; 1263 } 1264 } 1265#ifdef QUOTA 1266 qsync(mp); 1267#endif 1268 devvp = ump->um_devvp; 1269 VI_LOCK(devvp); 1270 bo = &devvp->v_bufobj; 1271 if (waitfor != MNT_LAZY && 1272 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1273 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1274 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1275 allerror = error; 1276 VOP_UNLOCK(devvp, 0, td); 1277 if (allerror == 0 && waitfor == MNT_WAIT) { 1278 MNT_ILOCK(mp); 1279 goto loop; 1280 } 1281 } else if (suspend != 0) { 1282 if (softdep_check_suspend(mp, 1283 devvp, 1284 softdep_deps, 1285 softdep_accdeps, 1286 secondary_writes, 1287 secondary_accwrites) != 0) 1288 goto loop; /* More work needed */ 1289 mtx_assert(MNT_MTX(mp), MA_OWNED); 1290 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1291 MNT_IUNLOCK(mp); 1292 suspended = 1; 1293 } else 1294 VI_UNLOCK(devvp); 1295 /* 1296 * Write back modified superblock. 1297 */ 1298 if (fs->fs_fmod != 0 && 1299 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1300 allerror = error; 1301 return (allerror); 1302} 1303 1304int 1305ffs_vget(mp, ino, flags, vpp) 1306 struct mount *mp; 1307 ino_t ino; 1308 int flags; 1309 struct vnode **vpp; 1310{ 1311 struct fs *fs; 1312 struct inode *ip; 1313 struct ufsmount *ump; 1314 struct buf *bp; 1315 struct vnode *vp; 1316 struct cdev *dev; 1317 int error; 1318 struct thread *td; 1319 1320 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1321 if (error || *vpp != NULL) 1322 return (error); 1323 1324 /* 1325 * We must promote to an exclusive lock for vnode creation. This 1326 * can happen if lookup is passed LOCKSHARED. 1327 */ 1328 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1329 flags &= ~LK_TYPE_MASK; 1330 flags |= LK_EXCLUSIVE; 1331 } 1332 1333 /* 1334 * We do not lock vnode creation as it is believed to be too 1335 * expensive for such rare case as simultaneous creation of vnode 1336 * for same ino by different processes. We just allow them to race 1337 * and check later to decide who wins. Let the race begin! 1338 */ 1339 1340 ump = VFSTOUFS(mp); 1341 dev = ump->um_dev; 1342 fs = ump->um_fs; 1343 1344 /* 1345 * If this MALLOC() is performed after the getnewvnode() 1346 * it might block, leaving a vnode with a NULL v_data to be 1347 * found by ffs_sync() if a sync happens to fire right then, 1348 * which will cause a panic because ffs_sync() blindly 1349 * dereferences vp->v_data (as well it should). 1350 */ 1351 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1352 1353 /* Allocate a new vnode/inode. */ 1354 if (fs->fs_magic == FS_UFS1_MAGIC) 1355 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1356 else 1357 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1358 if (error) { 1359 *vpp = NULL; 1360 uma_zfree(uma_inode, ip); 1361 return (error); 1362 } 1363 /* 1364 * FFS supports recursive and shared locking. 1365 */ 1366 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1367 vp->v_vnlock->lk_flags &= ~LK_NOSHARE; 1368 vp->v_data = ip; 1369 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1370 ip->i_vnode = vp; 1371 ip->i_ump = ump; 1372 ip->i_fs = fs; 1373 ip->i_dev = dev; 1374 ip->i_number = ino; 1375#ifdef QUOTA 1376 { 1377 int i; 1378 for (i = 0; i < MAXQUOTAS; i++) 1379 ip->i_dquot[i] = NODQUOT; 1380 } 1381#endif 1382 1383 td = curthread; 1384 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL, td); 1385 error = insmntque(vp, mp); 1386 if (error != 0) { 1387 uma_zfree(uma_inode, ip); 1388 *vpp = NULL; 1389 return (error); 1390 } 1391 error = vfs_hash_insert(vp, ino, flags, td, 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_associate_vnode_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 */ 1491static int 1492ffs_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 */ 1511static int 1512ffs_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 */ 1523static int 1524ffs_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 */ 1537int 1538ffs_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 1614static int 1615ffs_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 1628static void 1629ffs_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 1639static int dobkgrdwrite = 1; 1640SYSCTL_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 */ 1646static void 1647ffs_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_FIRST(&bp->b_dep) != NULL) 1666 buf_complete(bp); 1667#ifdef SOFTUPDATES 1668 if (LIST_FIRST(&bp->b_dep) != NULL) 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 */ 1707static int 1708ffs_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_REFCNT(bp) == 0) 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_FIRST(&bp->b_dep) != NULL) 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 1807static void 1808ffs_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_FIRST(&tbp->b_dep) != NULL) 1854 buf_start(tbp); 1855 } 1856 } else { 1857 if (LIST_FIRST(&bp->b_dep) != NULL) 1858 buf_start(bp); 1859 } 1860 1861#endif 1862 } 1863 g_vfs_strategy(bo, bp); 1864} 1865