1 /* $NetBSD: lfs_vfsops.c,v 1.190 2005/12/11 12:25:26 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Konrad E. Schroder <perseant@hhhh.org>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 /*- 39 * Copyright (c) 1989, 1991, 1993, 1994 40 * The Regents of the University of California. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)lfs_vfsops.c 8.20 (Berkeley) 6/10/95 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: lfs_vfsops.c,v 1.190 2005/12/11 12:25:26 christos Exp $"); 71 72 #if defined(_KERNEL_OPT) 73 #include "opt_quota.h" 74 #endif 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/namei.h> 79 #include <sys/proc.h> 80 #include <sys/kernel.h> 81 #include <sys/vnode.h> 82 #include <sys/mount.h> 83 #include <sys/kthread.h> 84 #include <sys/buf.h> 85 #include <sys/device.h> 86 #include <sys/mbuf.h> 87 #include <sys/file.h> 88 #include <sys/disklabel.h> 89 #include <sys/ioctl.h> 90 #include <sys/errno.h> 91 #include <sys/malloc.h> 92 #include <sys/pool.h> 93 #include <sys/socket.h> 94 #include <sys/syslog.h> 95 #include <uvm/uvm_extern.h> 96 #include <sys/sysctl.h> 97 #include <sys/conf.h> 98 99 #include <miscfs/specfs/specdev.h> 100 101 #include <ufs/ufs/quota.h> 102 #include <ufs/ufs/inode.h> 103 #include <ufs/ufs/ufsmount.h> 104 #include <ufs/ufs/ufs_extern.h> 105 106 #include <uvm/uvm.h> 107 #include <uvm/uvm_stat.h> 108 #include <uvm/uvm_pager.h> 109 #include <uvm/uvm_pdaemon.h> 110 111 #include <ufs/lfs/lfs.h> 112 #include <ufs/lfs/lfs_extern.h> 113 114 #include <miscfs/genfs/genfs.h> 115 #include <miscfs/genfs/genfs_node.h> 116 117 static int lfs_gop_write(struct vnode *, struct vm_page **, int, int); 118 static boolean_t lfs_issequential_hole(const struct ufsmount *, 119 daddr_t, daddr_t); 120 121 static int lfs_mountfs(struct vnode *, struct mount *, struct lwp *); 122 static void warn_ifile_size(struct lfs *); 123 static daddr_t check_segsum(struct lfs *, daddr_t, u_int64_t, 124 struct ucred *, int, int *, struct lwp *); 125 126 extern const struct vnodeopv_desc lfs_vnodeop_opv_desc; 127 extern const struct vnodeopv_desc lfs_specop_opv_desc; 128 extern const struct vnodeopv_desc lfs_fifoop_opv_desc; 129 130 pid_t lfs_writer_daemon = 0; 131 int lfs_do_flush = 0; 132 int lfs_do_rfw = 0; 133 134 const struct vnodeopv_desc * const lfs_vnodeopv_descs[] = { 135 &lfs_vnodeop_opv_desc, 136 &lfs_specop_opv_desc, 137 &lfs_fifoop_opv_desc, 138 NULL, 139 }; 140 141 struct vfsops lfs_vfsops = { 142 MOUNT_LFS, 143 lfs_mount, 144 ufs_start, 145 lfs_unmount, 146 ufs_root, 147 ufs_quotactl, 148 lfs_statvfs, 149 lfs_sync, 150 lfs_vget, 151 lfs_fhtovp, 152 lfs_vptofh, 153 lfs_init, 154 lfs_reinit, 155 lfs_done, 156 lfs_mountroot, 157 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 158 vfs_stdextattrctl, 159 lfs_vnodeopv_descs, 160 }; 161 VFS_ATTACH(lfs_vfsops); 162 163 const struct genfs_ops lfs_genfsops = { 164 .gop_size = lfs_gop_size, 165 .gop_alloc = ufs_gop_alloc, 166 .gop_write = lfs_gop_write, 167 .gop_markupdate = ufs_gop_markupdate, 168 }; 169 170 static const struct ufs_ops lfs_ufsops = { 171 .uo_itimes = NULL, 172 .uo_update = lfs_update, 173 .uo_truncate = lfs_truncate, 174 .uo_valloc = lfs_valloc, 175 .uo_vfree = lfs_vfree, 176 .uo_balloc = lfs_balloc, 177 .uo_blkatoff = lfs_blkatoff, 178 }; 179 180 /* 181 * XXX Same structure as FFS inodes? Should we share a common pool? 182 */ 183 POOL_INIT(lfs_inode_pool, sizeof(struct inode), 0, 0, 0, "lfsinopl", 184 &pool_allocator_nointr); 185 POOL_INIT(lfs_dinode_pool, sizeof(struct ufs1_dinode), 0, 0, 0, "lfsdinopl", 186 &pool_allocator_nointr); 187 POOL_INIT(lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, "lfsinoextpl", 188 &pool_allocator_nointr); 189 POOL_INIT(lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, "lfslbnpool", 190 &pool_allocator_nointr); 191 192 /* 193 * The writer daemon. UVM keeps track of how many dirty pages we are holding 194 * in lfs_subsys_pages; the daemon flushes the filesystem when this value 195 * crosses the (user-defined) threshhold LFS_MAX_PAGES. 196 */ 197 static void 198 lfs_writerd(void *arg) 199 { 200 struct mount *mp, *nmp; 201 struct lfs *fs; 202 int loopcount; 203 204 lfs_writer_daemon = curproc->p_pid; 205 206 simple_lock(&lfs_subsys_lock); 207 for (;;) { 208 ltsleep(&lfs_writer_daemon, PVM | PNORELOCK, "lfswriter", hz/10, 209 &lfs_subsys_lock); 210 211 /* 212 * Look through the list of LFSs to see if any of them 213 * have requested pageouts. 214 */ 215 simple_lock(&mountlist_slock); 216 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 217 mp = nmp) { 218 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 219 nmp = CIRCLEQ_NEXT(mp, mnt_list); 220 continue; 221 } 222 if (strncmp(&mp->mnt_stat.f_fstypename[0], MOUNT_LFS, 223 MFSNAMELEN) == 0) { 224 fs = VFSTOUFS(mp)->um_lfs; 225 simple_lock(&fs->lfs_interlock); 226 if (fs->lfs_pdflush || 227 !TAILQ_EMPTY(&fs->lfs_pchainhd)) { 228 DLOG((DLOG_FLUSH, "lfs_writerd: pdflush set\n")); 229 fs->lfs_pdflush = 0; 230 lfs_flush_fs(fs, 0); 231 } 232 simple_unlock(&fs->lfs_interlock); 233 } 234 235 simple_lock(&mountlist_slock); 236 nmp = CIRCLEQ_NEXT(mp, mnt_list); 237 vfs_unbusy(mp); 238 } 239 simple_unlock(&mountlist_slock); 240 241 /* 242 * If global state wants a flush, flush everything. 243 */ 244 simple_lock(&lfs_subsys_lock); 245 loopcount = 0; 246 if (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || 247 locked_queue_bytes > LFS_MAX_BYTES || 248 lfs_subsys_pages > LFS_MAX_PAGES) { 249 250 if (lfs_do_flush) 251 DLOG((DLOG_FLUSH, "daemon: lfs_do_flush\n")); 252 if (locked_queue_count > LFS_MAX_BUFS) 253 DLOG((DLOG_FLUSH, "daemon: lqc = %d, max %d\n", 254 locked_queue_count, LFS_MAX_BUFS)); 255 if (locked_queue_bytes > LFS_MAX_BYTES) 256 DLOG((DLOG_FLUSH, "daemon: lqb = %ld, max %ld\n", 257 locked_queue_bytes, LFS_MAX_BYTES)); 258 if (lfs_subsys_pages > LFS_MAX_PAGES) 259 DLOG((DLOG_FLUSH, "daemon: lssp = %d, max %d\n", 260 lfs_subsys_pages, LFS_MAX_PAGES)); 261 262 lfs_flush(NULL, SEGM_WRITERD, 0); 263 lfs_do_flush = 0; 264 } 265 } 266 /* NOTREACHED */ 267 } 268 269 /* 270 * Initialize the filesystem, most work done by ufs_init. 271 */ 272 void 273 lfs_init() 274 { 275 #ifdef _LKM 276 malloc_type_attach(M_SEGMENT); 277 pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, 278 "lfsinopl", &pool_allocator_nointr); 279 pool_init(&lfs_dinode_pool, sizeof(struct ufs1_dinode), 0, 0, 0, 280 "lfsdinopl", &pool_allocator_nointr); 281 pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, 282 "lfsinoextpl", &pool_allocator_nointr); 283 pool_init(&lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, 284 "lfslbnpool", &pool_allocator_nointr); 285 #endif 286 ufs_init(); 287 288 #ifdef DEBUG 289 memset(lfs_log, 0, sizeof(lfs_log)); 290 #endif 291 simple_lock_init(&lfs_subsys_lock); 292 } 293 294 void 295 lfs_reinit() 296 { 297 ufs_reinit(); 298 } 299 300 void 301 lfs_done() 302 { 303 ufs_done(); 304 #ifdef _LKM 305 pool_destroy(&lfs_inode_pool); 306 pool_destroy(&lfs_dinode_pool); 307 pool_destroy(&lfs_inoext_pool); 308 pool_destroy(&lfs_lbnentry_pool); 309 malloc_type_detach(M_SEGMENT); 310 #endif 311 } 312 313 /* 314 * Called by main() when ufs is going to be mounted as root. 315 */ 316 int 317 lfs_mountroot() 318 { 319 extern struct vnode *rootvp; 320 struct mount *mp; 321 struct lwp *l = curlwp; /* XXX */ 322 int error; 323 324 if (root_device->dv_class != DV_DISK) 325 return (ENODEV); 326 327 if (rootdev == NODEV) 328 return (ENODEV); 329 if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device", &mp))) { 330 vrele(rootvp); 331 return (error); 332 } 333 if ((error = lfs_mountfs(rootvp, mp, l))) { 334 mp->mnt_op->vfs_refcount--; 335 vfs_unbusy(mp); 336 free(mp, M_MOUNT); 337 return (error); 338 } 339 simple_lock(&mountlist_slock); 340 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 341 simple_unlock(&mountlist_slock); 342 (void)lfs_statvfs(mp, &mp->mnt_stat, l); 343 vfs_unbusy(mp); 344 setrootfstime((time_t)(VFSTOUFS(mp)->um_lfs->lfs_tstamp)); 345 return (0); 346 } 347 348 /* 349 * VFS Operations. 350 * 351 * mount system call 352 */ 353 int 354 lfs_mount(struct mount *mp, const char *path, void *data, struct nameidata *ndp, struct lwp *l) 355 { 356 struct vnode *devvp; 357 struct ufs_args args; 358 struct ufsmount *ump = NULL; 359 struct lfs *fs = NULL; /* LFS */ 360 struct proc *p; 361 int error, update; 362 mode_t accessmode; 363 364 p = l->l_proc; 365 if (mp->mnt_flag & MNT_GETARGS) { 366 ump = VFSTOUFS(mp); 367 if (ump == NULL) 368 return EIO; 369 args.fspec = NULL; 370 return copyout(&args, data, sizeof(args)); 371 } 372 error = copyin(data, &args, sizeof (struct ufs_args)); 373 if (error) 374 return (error); 375 376 update = mp->mnt_flag & MNT_UPDATE; 377 378 /* Check arguments */ 379 if (args.fspec != NULL) { 380 /* 381 * Look up the name and verify that it's sane. 382 */ 383 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 384 if ((error = namei(ndp)) != 0) 385 return (error); 386 devvp = ndp->ni_vp; 387 388 if (!update) { 389 /* 390 * Be sure this is a valid block device 391 */ 392 if (devvp->v_type != VBLK) 393 error = ENOTBLK; 394 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 395 error = ENXIO; 396 } else { 397 /* 398 * Be sure we're still naming the same device 399 * used for our initial mount 400 */ 401 ump = VFSTOUFS(mp); 402 if (devvp != ump->um_devvp) 403 error = EINVAL; 404 } 405 } else { 406 if (!update) { 407 /* New mounts must have a filename for the device */ 408 return (EINVAL); 409 } else { 410 /* Use the extant mount */ 411 ump = VFSTOUFS(mp); 412 devvp = ump->um_devvp; 413 vref(devvp); 414 } 415 } 416 417 418 /* 419 * If mount by non-root, then verify that user has necessary 420 * permissions on the device. 421 */ 422 if (error == 0 && p->p_ucred->cr_uid != 0) { 423 accessmode = VREAD; 424 if (update ? 425 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 426 (mp->mnt_flag & MNT_RDONLY) == 0) 427 accessmode |= VWRITE; 428 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 429 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, l); 430 VOP_UNLOCK(devvp, 0); 431 } 432 433 if (error) { 434 vrele(devvp); 435 return (error); 436 } 437 438 if (!update) { 439 int flags; 440 441 /* 442 * Disallow multiple mounts of the same device. 443 * Disallow mounting of a device that is currently in use 444 * (except for root, which might share swap device for 445 * miniroot). 446 */ 447 error = vfs_mountedon(devvp); 448 if (error) 449 goto fail; 450 if (vcount(devvp) > 1 && devvp != rootvp) { 451 error = EBUSY; 452 goto fail; 453 } 454 if (mp->mnt_flag & MNT_RDONLY) 455 flags = FREAD; 456 else 457 flags = FREAD|FWRITE; 458 error = VOP_OPEN(devvp, flags, FSCRED, l); 459 if (error) 460 goto fail; 461 error = lfs_mountfs(devvp, mp, l); /* LFS */ 462 if (error) { 463 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 464 (void)VOP_CLOSE(devvp, flags, NOCRED, l); 465 VOP_UNLOCK(devvp, 0); 466 goto fail; 467 } 468 469 ump = VFSTOUFS(mp); 470 fs = ump->um_lfs; 471 } else { 472 /* 473 * Update the mount. 474 */ 475 476 /* 477 * The initial mount got a reference on this 478 * device, so drop the one obtained via 479 * namei(), above. 480 */ 481 vrele(devvp); 482 483 ump = VFSTOUFS(mp); 484 fs = ump->um_lfs; 485 if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 486 /* 487 * Changing from read-only to read/write 488 */ 489 fs->lfs_ronly = 0; 490 } 491 if (args.fspec == NULL) 492 return EINVAL; 493 } 494 495 error = set_statvfs_info(path, UIO_USERSPACE, args.fspec, 496 UIO_USERSPACE, mp, l); 497 if (error == 0) 498 (void)strncpy(fs->lfs_fsmnt, mp->mnt_stat.f_mntonname, 499 sizeof(fs->lfs_fsmnt)); 500 return error; 501 502 fail: 503 vrele(devvp); 504 return (error); 505 } 506 507 /* 508 * Roll-forward code. 509 */ 510 511 /* 512 * Load the appropriate indirect block, and change the appropriate pointer. 513 * Mark the block dirty. Do segment and avail accounting. 514 */ 515 static int 516 update_meta(struct lfs *fs, ino_t ino, int vers, daddr_t lbn, 517 daddr_t ndaddr, size_t size, struct lwp *l) 518 { 519 int error; 520 struct vnode *vp; 521 struct inode *ip; 522 #ifdef DEBUG 523 daddr_t odaddr; 524 struct indir a[NIADDR]; 525 int num; 526 int i; 527 #endif /* DEBUG */ 528 struct buf *bp; 529 SEGUSE *sup; 530 531 KASSERT(lbn >= 0); /* no indirect blocks */ 532 533 if ((error = lfs_rf_valloc(fs, ino, vers, l, &vp)) != 0) { 534 DLOG((DLOG_RF, "update_meta: ino %d: lfs_rf_valloc" 535 " returned %d\n", ino, error)); 536 return error; 537 } 538 539 if ((error = lfs_balloc(vp, (lbn << fs->lfs_bshift), size, 540 NOCRED, 0, &bp)) != 0) { 541 vput(vp); 542 return (error); 543 } 544 /* No need to write, the block is already on disk */ 545 if (bp->b_flags & B_DELWRI) { 546 LFS_UNLOCK_BUF(bp); 547 fs->lfs_avail += btofsb(fs, bp->b_bcount); 548 } 549 bp->b_flags |= B_INVAL; 550 brelse(bp); 551 552 /* 553 * Extend the file, if it is not large enough already. 554 * XXX this is not exactly right, we don't know how much of the 555 * XXX last block is actually used. We hope that an inode will 556 * XXX appear later to give the correct size. 557 */ 558 ip = VTOI(vp); 559 if (ip->i_size <= (lbn << fs->lfs_bshift)) { 560 u_int64_t newsize; 561 562 if (lbn < NDADDR) 563 newsize = ip->i_ffs1_size = (lbn << fs->lfs_bshift) + 564 (size - fs->lfs_fsize) + 1; 565 else 566 newsize = ip->i_ffs1_size = (lbn << fs->lfs_bshift) + 1; 567 568 if (ip->i_size < newsize) { 569 ip->i_size = newsize; 570 /* 571 * tell vm our new size for the case the inode won't 572 * appear later. 573 */ 574 uvm_vnp_setsize(vp, newsize); 575 } 576 } 577 578 lfs_update_single(fs, NULL, vp, lbn, ndaddr, size); 579 580 LFS_SEGENTRY(sup, fs, dtosn(fs, ndaddr), bp); 581 sup->su_nbytes += size; 582 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, ndaddr), bp); 583 584 /* differences here should be due to UNWRITTEN indirect blocks. */ 585 KASSERT((lblkno(fs, ip->i_size) > NDADDR && 586 ip->i_lfs_effnblks == ip->i_ffs1_blocks) || 587 ip->i_lfs_effnblks >= ip->i_ffs1_blocks); 588 589 #ifdef DEBUG 590 /* Now look again to make sure it worked */ 591 ufs_bmaparray(vp, lbn, &odaddr, &a[0], &num, NULL, NULL); 592 for (i = num; i > 0; i--) { 593 if (!a[i].in_exists) 594 panic("update_meta: absent %d lv indirect block", i); 595 } 596 if (dbtofsb(fs, odaddr) != ndaddr) 597 DLOG((DLOG_RF, "update_meta: failed setting ino %d lbn %" 598 PRId64 " to %" PRId64 "\n", ino, lbn, ndaddr)); 599 #endif /* DEBUG */ 600 vput(vp); 601 return 0; 602 } 603 604 static int 605 update_inoblk(struct lfs *fs, daddr_t offset, struct ucred *cred, 606 struct lwp *l) 607 { 608 struct vnode *devvp, *vp; 609 struct inode *ip; 610 struct ufs1_dinode *dip; 611 struct buf *dbp, *ibp; 612 int error; 613 daddr_t daddr; 614 IFILE *ifp; 615 SEGUSE *sup; 616 617 devvp = VTOI(fs->lfs_ivnode)->i_devvp; 618 619 /* 620 * Get the inode, update times and perms. 621 * DO NOT update disk blocks, we do that separately. 622 */ 623 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_ibsize, cred, &dbp); 624 if (error) { 625 DLOG((DLOG_RF, "update_inoblk: bread returned %d\n", error)); 626 return error; 627 } 628 dip = ((struct ufs1_dinode *)(dbp->b_data)) + INOPB(fs); 629 while (--dip >= (struct ufs1_dinode *)dbp->b_data) { 630 if (dip->di_inumber > LFS_IFILE_INUM) { 631 error = lfs_rf_valloc(fs, dip->di_inumber, dip->di_gen, 632 l, &vp); 633 if (error) { 634 DLOG((DLOG_RF, "update_inoblk: lfs_rf_valloc" 635 " returned %d\n", error)); 636 continue; 637 } 638 ip = VTOI(vp); 639 if (dip->di_size != ip->i_size) 640 lfs_truncate(vp, dip->di_size, 0, NOCRED, l); 641 /* Get mode, link count, size, and times */ 642 memcpy(ip->i_din.ffs1_din, dip, 643 offsetof(struct ufs1_dinode, di_db[0])); 644 645 /* Then the rest, except di_blocks */ 646 ip->i_flags = ip->i_ffs1_flags = dip->di_flags; 647 ip->i_gen = ip->i_ffs1_gen = dip->di_gen; 648 ip->i_uid = ip->i_ffs1_uid = dip->di_uid; 649 ip->i_gid = ip->i_ffs1_gid = dip->di_gid; 650 651 ip->i_mode = ip->i_ffs1_mode; 652 ip->i_nlink = ip->i_ffs_effnlink = ip->i_ffs1_nlink; 653 ip->i_size = ip->i_ffs1_size; 654 655 LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE); 656 657 /* Re-initialize to get type right */ 658 ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, 659 &vp); 660 vput(vp); 661 662 /* Record change in location */ 663 LFS_IENTRY(ifp, fs, dip->di_inumber, ibp); 664 daddr = ifp->if_daddr; 665 ifp->if_daddr = dbtofsb(fs, dbp->b_blkno); 666 error = LFS_BWRITE_LOG(ibp); /* Ifile */ 667 /* And do segment accounting */ 668 if (dtosn(fs, daddr) != dtosn(fs, dbtofsb(fs, dbp->b_blkno))) { 669 if (daddr > 0) { 670 LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), 671 ibp); 672 sup->su_nbytes -= sizeof (struct ufs1_dinode); 673 LFS_WRITESEGENTRY(sup, fs, 674 dtosn(fs, daddr), 675 ibp); 676 } 677 LFS_SEGENTRY(sup, fs, dtosn(fs, dbtofsb(fs, dbp->b_blkno)), 678 ibp); 679 sup->su_nbytes += sizeof (struct ufs1_dinode); 680 LFS_WRITESEGENTRY(sup, fs, 681 dtosn(fs, dbtofsb(fs, dbp->b_blkno)), 682 ibp); 683 } 684 } 685 } 686 dbp->b_flags |= B_AGE; 687 brelse(dbp); 688 689 return 0; 690 } 691 692 #define CHECK_CKSUM 0x0001 /* Check the checksum to make sure it's valid */ 693 #define CHECK_UPDATE 0x0002 /* Update Ifile for new data blocks / inodes */ 694 695 static daddr_t 696 check_segsum(struct lfs *fs, daddr_t offset, u_int64_t nextserial, 697 struct ucred *cred, int flags, int *pseg_flags, struct lwp *l) 698 { 699 struct vnode *devvp; 700 struct buf *bp, *dbp; 701 int error, nblocks = 0, ninos, i, j; /* XXX: gcc */ 702 SEGSUM *ssp; 703 u_long *dp = NULL, *datap = NULL; /* XXX u_int32_t */ 704 daddr_t oldoffset; 705 int32_t *iaddr; /* XXX ondisk32 */ 706 FINFO *fip; 707 SEGUSE *sup; 708 size_t size; 709 710 devvp = VTOI(fs->lfs_ivnode)->i_devvp; 711 /* 712 * If the segment has a superblock and we're at the top 713 * of the segment, skip the superblock. 714 */ 715 if (sntod(fs, dtosn(fs, offset)) == offset) { 716 LFS_SEGENTRY(sup, fs, dtosn(fs, offset), bp); 717 if (sup->su_flags & SEGUSE_SUPERBLOCK) 718 offset += btofsb(fs, LFS_SBPAD); 719 brelse(bp); 720 } 721 722 /* Read in the segment summary */ 723 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_sumsize, cred, &bp); 724 if (error) 725 return -1; 726 727 /* Check summary checksum */ 728 ssp = (SEGSUM *)bp->b_data; 729 if (flags & CHECK_CKSUM) { 730 if (ssp->ss_sumsum != cksum(&ssp->ss_datasum, 731 fs->lfs_sumsize - 732 sizeof(ssp->ss_sumsum))) { 733 DLOG((DLOG_RF, "Sumsum error at 0x%" PRIx64 "\n", offset)); 734 offset = -1; 735 goto err1; 736 } 737 if (ssp->ss_nfinfo == 0 && ssp->ss_ninos == 0) { 738 DLOG((DLOG_RF, "Empty pseg at 0x%" PRIx64 "\n", offset)); 739 offset = -1; 740 goto err1; 741 } 742 if (ssp->ss_create < fs->lfs_tstamp) { 743 DLOG((DLOG_RF, "Old data at 0x%" PRIx64 "\n", offset)); 744 offset = -1; 745 goto err1; 746 } 747 } 748 if (fs->lfs_version > 1) { 749 if (ssp->ss_serial != nextserial) { 750 DLOG((DLOG_RF, "Unexpected serial number at 0x%" PRIx64 751 "\n", offset)); 752 offset = -1; 753 goto err1; 754 } 755 if (ssp->ss_ident != fs->lfs_ident) { 756 DLOG((DLOG_RF, "Incorrect fsid (0x%x vs 0x%x) at 0x%" 757 PRIx64 "\n", ssp->ss_ident, fs->lfs_ident, offset)); 758 offset = -1; 759 goto err1; 760 } 761 } 762 if (pseg_flags) 763 *pseg_flags = ssp->ss_flags; 764 oldoffset = offset; 765 offset += btofsb(fs, fs->lfs_sumsize); 766 767 ninos = howmany(ssp->ss_ninos, INOPB(fs)); 768 /* XXX ondisk32 */ 769 iaddr = (int32_t *)(bp->b_data + fs->lfs_sumsize - sizeof(int32_t)); 770 if (flags & CHECK_CKSUM) { 771 /* Count blocks */ 772 nblocks = 0; 773 fip = (FINFO *)(bp->b_data + SEGSUM_SIZE(fs)); 774 for (i = 0; i < ssp->ss_nfinfo; ++i) { 775 nblocks += fip->fi_nblocks; 776 if (fip->fi_nblocks <= 0) 777 break; 778 /* XXX ondisk32 */ 779 fip = (FINFO *)(((char *)fip) + FINFOSIZE + 780 (fip->fi_nblocks * sizeof(int32_t))); 781 } 782 nblocks += ninos; 783 /* Create the sum array */ 784 datap = dp = (u_long *)malloc(nblocks * sizeof(u_long), 785 M_SEGMENT, M_WAITOK); 786 } 787 788 /* Handle individual blocks */ 789 fip = (FINFO *)(bp->b_data + SEGSUM_SIZE(fs)); 790 for (i = 0; i < ssp->ss_nfinfo || ninos; ++i) { 791 /* Inode block? */ 792 if (ninos && *iaddr == offset) { 793 if (flags & CHECK_CKSUM) { 794 /* Read in the head and add to the buffer */ 795 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_bsize, 796 cred, &dbp); 797 if (error) { 798 offset = -1; 799 goto err2; 800 } 801 (*dp++) = ((u_long *)(dbp->b_data))[0]; 802 dbp->b_flags |= B_AGE; 803 brelse(dbp); 804 } 805 if (flags & CHECK_UPDATE) { 806 if ((error = update_inoblk(fs, offset, cred, l)) 807 != 0) { 808 offset = -1; 809 goto err2; 810 } 811 } 812 offset += btofsb(fs, fs->lfs_ibsize); 813 --iaddr; 814 --ninos; 815 --i; /* compensate */ 816 continue; 817 } 818 size = fs->lfs_bsize; 819 for (j = 0; j < fip->fi_nblocks; ++j) { 820 if (j == fip->fi_nblocks - 1) 821 size = fip->fi_lastlength; 822 if (flags & CHECK_CKSUM) { 823 error = bread(devvp, fsbtodb(fs, offset), size, cred, &dbp); 824 if (error) { 825 offset = -1; 826 goto err2; 827 } 828 (*dp++) = ((u_long *)(dbp->b_data))[0]; 829 dbp->b_flags |= B_AGE; 830 brelse(dbp); 831 } 832 /* Account for and update any direct blocks */ 833 if ((flags & CHECK_UPDATE) && 834 fip->fi_ino > LFS_IFILE_INUM && 835 fip->fi_blocks[j] >= 0) { 836 update_meta(fs, fip->fi_ino, fip->fi_version, 837 fip->fi_blocks[j], offset, size, l); 838 } 839 offset += btofsb(fs, size); 840 } 841 /* XXX ondisk32 */ 842 fip = (FINFO *)(((char *)fip) + FINFOSIZE 843 + fip->fi_nblocks * sizeof(int32_t)); 844 } 845 /* Checksum the array, compare */ 846 if ((flags & CHECK_CKSUM) && 847 ssp->ss_datasum != cksum(datap, nblocks * sizeof(u_long))) 848 { 849 DLOG((DLOG_RF, "Datasum error at 0x%" PRIx64 850 " (wanted %x got %x)\n", 851 offset, ssp->ss_datasum, cksum(datap, nblocks * 852 sizeof(u_long)))); 853 offset = -1; 854 goto err2; 855 } 856 857 /* If we're at the end of the segment, move to the next */ 858 if (dtosn(fs, offset + btofsb(fs, fs->lfs_sumsize + fs->lfs_bsize)) != 859 dtosn(fs, offset)) { 860 if (dtosn(fs, offset) == dtosn(fs, ssp->ss_next)) { 861 offset = -1; 862 goto err2; 863 } 864 offset = ssp->ss_next; 865 DLOG((DLOG_RF, "LFS roll forward: moving to offset 0x%" PRIx64 866 " -> segment %d\n", offset, dtosn(fs,offset))); 867 } 868 869 if (flags & CHECK_UPDATE) { 870 fs->lfs_avail -= (offset - oldoffset); 871 /* Don't clog the buffer queue */ 872 simple_lock(&lfs_subsys_lock); 873 if (locked_queue_count > LFS_MAX_BUFS || 874 locked_queue_bytes > LFS_MAX_BYTES) { 875 lfs_flush(fs, SEGM_CKP, 0); 876 } 877 simple_unlock(&lfs_subsys_lock); 878 } 879 880 err2: 881 if (flags & CHECK_CKSUM) 882 free(datap, M_SEGMENT); 883 err1: 884 bp->b_flags |= B_AGE; 885 brelse(bp); 886 887 /* XXX should we update the serial number even for bad psegs? */ 888 if ((flags & CHECK_UPDATE) && offset > 0 && fs->lfs_version > 1) 889 fs->lfs_serial = nextserial; 890 return offset; 891 } 892 893 /* 894 * Common code for mount and mountroot 895 * LFS specific 896 */ 897 int 898 lfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 899 { 900 struct dlfs *tdfs, *dfs, *adfs; 901 struct lfs *fs; 902 struct ufsmount *ump; 903 struct vnode *vp; 904 struct buf *bp, *abp; 905 struct partinfo dpart; 906 struct proc *p; 907 dev_t dev; 908 int error, i, ronly, secsize, fsbsize; 909 struct ucred *cred; 910 CLEANERINFO *cip; 911 SEGUSE *sup; 912 int flags, dirty, do_rollforward; 913 daddr_t offset, oldoffset, lastgoodpseg, sb_addr; 914 int sn, curseg; 915 916 p = l ? l->l_proc : NULL; 917 cred = p ? p->p_ucred : NOCRED; 918 919 /* 920 * Flush out any old buffers remaining from a previous use. 921 */ 922 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 923 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 924 VOP_UNLOCK(devvp, 0); 925 if (error) 926 return (error); 927 928 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 929 if (VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, l) != 0) 930 secsize = DEV_BSIZE; 931 else 932 secsize = dpart.disklab->d_secsize; 933 934 /* Don't free random space on error. */ 935 bp = NULL; 936 abp = NULL; 937 ump = NULL; 938 939 sb_addr = LFS_LABELPAD / secsize; 940 while (1) { 941 /* Read in the superblock. */ 942 error = bread(devvp, sb_addr, LFS_SBPAD, cred, &bp); 943 if (error) 944 goto out; 945 dfs = (struct dlfs *)bp->b_data; 946 947 /* Check the basics. */ 948 if (dfs->dlfs_magic != LFS_MAGIC || dfs->dlfs_bsize > MAXBSIZE || 949 dfs->dlfs_version > LFS_VERSION || 950 dfs->dlfs_bsize < sizeof(struct dlfs)) { 951 DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock sanity failed\n")); 952 error = EINVAL; /* XXX needs translation */ 953 goto out; 954 } 955 if (dfs->dlfs_inodefmt > LFS_MAXINODEFMT) { 956 DLOG((DLOG_MOUNT, "lfs_mountfs: unknown inode format %d\n", 957 dfs->dlfs_inodefmt)); 958 error = EINVAL; 959 goto out; 960 } 961 962 if (dfs->dlfs_version == 1) 963 fsbsize = secsize; 964 else { 965 fsbsize = 1 << (dfs->dlfs_bshift - dfs->dlfs_blktodb + 966 dfs->dlfs_fsbtodb); 967 /* 968 * Could be, if the frag size is large enough, that we 969 * don't have the "real" primary superblock. If that's 970 * the case, get the real one, and try again. 971 */ 972 if (sb_addr != dfs->dlfs_sboffs[0] << 973 dfs->dlfs_fsbtodb) { 974 DLOG((DLOG_MOUNT, "lfs_mountfs: sb daddr" 975 " 0x%llx is not right, trying 0x%llx\n", 976 (long long)sb_addr, 977 (long long)(dfs->dlfs_sboffs[0] << 978 dfs->dlfs_fsbtodb))); 979 sb_addr = dfs->dlfs_sboffs[0] << 980 dfs->dlfs_fsbtodb; 981 brelse(bp); 982 continue; 983 } 984 } 985 break; 986 } 987 988 /* 989 * Check the second superblock to see which is newer; then mount 990 * using the older of the two. This is necessary to ensure that 991 * the filesystem is valid if it was not unmounted cleanly. 992 */ 993 994 if (dfs->dlfs_sboffs[1] && 995 dfs->dlfs_sboffs[1] - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) 996 { 997 error = bread(devvp, dfs->dlfs_sboffs[1] * (fsbsize / secsize), 998 LFS_SBPAD, cred, &abp); 999 if (error) 1000 goto out; 1001 adfs = (struct dlfs *)abp->b_data; 1002 1003 if (dfs->dlfs_version == 1) { 1004 /* 1s resolution comparison */ 1005 if (adfs->dlfs_tstamp < dfs->dlfs_tstamp) 1006 tdfs = adfs; 1007 else 1008 tdfs = dfs; 1009 } else { 1010 /* monotonic infinite-resolution comparison */ 1011 if (adfs->dlfs_serial < dfs->dlfs_serial) 1012 tdfs = adfs; 1013 else 1014 tdfs = dfs; 1015 } 1016 1017 /* Check the basics. */ 1018 if (tdfs->dlfs_magic != LFS_MAGIC || 1019 tdfs->dlfs_bsize > MAXBSIZE || 1020 tdfs->dlfs_version > LFS_VERSION || 1021 tdfs->dlfs_bsize < sizeof(struct dlfs)) { 1022 DLOG((DLOG_MOUNT, "lfs_mountfs: alt superblock" 1023 " sanity failed\n")); 1024 error = EINVAL; /* XXX needs translation */ 1025 goto out; 1026 } 1027 } else { 1028 DLOG((DLOG_MOUNT, "lfs_mountfs: invalid alt superblock" 1029 " daddr=0x%x\n", dfs->dlfs_sboffs[1])); 1030 error = EINVAL; 1031 goto out; 1032 } 1033 1034 /* Allocate the mount structure, copy the superblock into it. */ 1035 fs = malloc(sizeof(struct lfs), M_UFSMNT, M_WAITOK | M_ZERO); 1036 memcpy(&fs->lfs_dlfs, tdfs, sizeof(struct dlfs)); 1037 1038 /* Compatibility */ 1039 if (fs->lfs_version < 2) { 1040 fs->lfs_sumsize = LFS_V1_SUMMARY_SIZE; 1041 fs->lfs_ibsize = fs->lfs_bsize; 1042 fs->lfs_start = fs->lfs_sboffs[0]; 1043 fs->lfs_tstamp = fs->lfs_otstamp; 1044 fs->lfs_fsbtodb = 0; 1045 } 1046 1047 /* 1048 * If we aren't going to be able to write meaningfully to this 1049 * filesystem, and were not mounted readonly, bomb out now. 1050 */ 1051 if (fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) { 1052 DLOG((DLOG_MOUNT, "lfs_mount: to mount this filesystem read/write," 1053 " we need BUFPAGES >= %lld\n", 1054 (long long)((bufmem_hiwater / bufmem_lowater) * 1055 LFS_INVERSE_MAX_BYTES( 1056 fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT))); 1057 free(fs, M_UFSMNT); 1058 error = EFBIG; /* XXX needs translation */ 1059 goto out; 1060 } 1061 1062 /* Before rolling forward, lock so vget will sleep for other procs */ 1063 fs->lfs_flags = LFS_NOTYET; 1064 fs->lfs_rfpid = p->p_pid; 1065 1066 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 1067 ump->um_lfs = fs; 1068 ump->um_ops = &lfs_ufsops; 1069 ump->um_fstype = UFS1; 1070 if (sizeof(struct lfs) < LFS_SBPAD) { /* XXX why? */ 1071 bp->b_flags |= B_INVAL; 1072 abp->b_flags |= B_INVAL; 1073 } 1074 brelse(bp); 1075 bp = NULL; 1076 brelse(abp); 1077 abp = NULL; 1078 1079 /* Set up the I/O information */ 1080 fs->lfs_devbsize = secsize; 1081 fs->lfs_iocount = 0; 1082 fs->lfs_diropwait = 0; 1083 fs->lfs_activesb = 0; 1084 fs->lfs_uinodes = 0; 1085 fs->lfs_ravail = 0; 1086 fs->lfs_favail = 0; 1087 fs->lfs_sbactive = 0; 1088 1089 /* Set up the ifile and lock aflags */ 1090 fs->lfs_doifile = 0; 1091 fs->lfs_writer = 0; 1092 fs->lfs_dirops = 0; 1093 fs->lfs_nadirop = 0; 1094 fs->lfs_seglock = 0; 1095 fs->lfs_pdflush = 0; 1096 fs->lfs_sleepers = 0; 1097 fs->lfs_pages = 0; 1098 simple_lock_init(&fs->lfs_interlock); 1099 lockinit(&fs->lfs_fraglock, PINOD, "lfs_fraglock", 0, 0); 1100 lockinit(&fs->lfs_iflock, PINOD, "lfs_iflock", 0, 0); 1101 1102 /* Set the file system readonly/modify bits. */ 1103 fs->lfs_ronly = ronly; 1104 if (ronly == 0) 1105 fs->lfs_fmod = 1; 1106 1107 /* Initialize the mount structure. */ 1108 dev = devvp->v_rdev; 1109 mp->mnt_data = ump; 1110 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1111 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); 1112 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1113 mp->mnt_stat.f_namemax = LFS_MAXNAMLEN; 1114 mp->mnt_stat.f_iosize = fs->lfs_bsize; 1115 mp->mnt_flag |= MNT_LOCAL; 1116 mp->mnt_fs_bshift = fs->lfs_bshift; 1117 ump->um_flags = 0; 1118 ump->um_mountp = mp; 1119 ump->um_dev = dev; 1120 ump->um_devvp = devvp; 1121 ump->um_bptrtodb = fs->lfs_fsbtodb; 1122 ump->um_seqinc = fragstofsb(fs, fs->lfs_frag); 1123 ump->um_nindir = fs->lfs_nindir; 1124 ump->um_lognindir = ffs(fs->lfs_nindir) - 1; 1125 for (i = 0; i < MAXQUOTAS; i++) 1126 ump->um_quotas[i] = NULLVP; 1127 ump->um_maxsymlinklen = fs->lfs_maxsymlinklen; 1128 ump->um_dirblksiz = DIRBLKSIZ; 1129 ump->um_maxfilesize = fs->lfs_maxfilesize; 1130 if (ump->um_maxsymlinklen > 0) 1131 mp->mnt_iflag |= IMNT_DTYPE; 1132 devvp->v_specmountpoint = mp; 1133 1134 /* Set up reserved memory for pageout */ 1135 lfs_setup_resblks(fs); 1136 /* Set up vdirop tailq */ 1137 TAILQ_INIT(&fs->lfs_dchainhd); 1138 /* and paging tailq */ 1139 TAILQ_INIT(&fs->lfs_pchainhd); 1140 1141 /* 1142 * We use the ifile vnode for almost every operation. Instead of 1143 * retrieving it from the hash table each time we retrieve it here, 1144 * artificially increment the reference count and keep a pointer 1145 * to it in the incore copy of the superblock. 1146 */ 1147 if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { 1148 DLOG((DLOG_MOUNT, "lfs_mountfs: ifile vget failed, error=%d\n", error)); 1149 goto out; 1150 } 1151 fs->lfs_ivnode = vp; 1152 VREF(vp); 1153 1154 /* Set up segment usage flags for the autocleaner. */ 1155 fs->lfs_nactive = 0; 1156 fs->lfs_suflags = (u_int32_t **)malloc(2 * sizeof(u_int32_t *), 1157 M_SEGMENT, M_WAITOK); 1158 fs->lfs_suflags[0] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1159 M_SEGMENT, M_WAITOK); 1160 fs->lfs_suflags[1] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1161 M_SEGMENT, M_WAITOK); 1162 memset(fs->lfs_suflags[1], 0, fs->lfs_nseg * sizeof(u_int32_t)); 1163 for (i = 0; i < fs->lfs_nseg; i++) { 1164 int changed; 1165 1166 LFS_SEGENTRY(sup, fs, i, bp); 1167 changed = 0; 1168 if (!ronly) { 1169 if (sup->su_nbytes == 0 && 1170 !(sup->su_flags & SEGUSE_EMPTY)) { 1171 sup->su_flags |= SEGUSE_EMPTY; 1172 ++changed; 1173 } else if (!(sup->su_nbytes == 0) && 1174 (sup->su_flags & SEGUSE_EMPTY)) { 1175 sup->su_flags &= ~SEGUSE_EMPTY; 1176 ++changed; 1177 } 1178 if (sup->su_flags & (SEGUSE_ACTIVE|SEGUSE_INVAL)) { 1179 sup->su_flags &= ~(SEGUSE_ACTIVE|SEGUSE_INVAL); 1180 ++changed; 1181 } 1182 } 1183 fs->lfs_suflags[0][i] = sup->su_flags; 1184 if (changed) 1185 LFS_WRITESEGENTRY(sup, fs, i, bp); 1186 else 1187 brelse(bp); 1188 } 1189 1190 /* 1191 * Roll forward. 1192 * 1193 * We don't roll forward for v1 filesystems, because 1194 * of the danger that the clock was turned back between the last 1195 * checkpoint and crash. This would roll forward garbage. 1196 * 1197 * v2 filesystems don't have this problem because they use a 1198 * monotonically increasing serial number instead of a timestamp. 1199 */ 1200 do_rollforward = (!(fs->lfs_pflags & LFS_PF_CLEAN) && 1201 lfs_do_rfw && fs->lfs_version > 1); 1202 if (do_rollforward) { 1203 u_int64_t nextserial; 1204 /* 1205 * Phase I: Find the address of the last good partial 1206 * segment that was written after the checkpoint. Mark 1207 * the segments in question dirty, so they won't be 1208 * reallocated. 1209 */ 1210 lastgoodpseg = oldoffset = offset = fs->lfs_offset; 1211 flags = 0x0; 1212 DLOG((DLOG_RF, "LFS roll forward phase 1: start at offset 0x%" 1213 PRIx64 "\n", offset)); 1214 LFS_SEGENTRY(sup, fs, dtosn(fs, offset), bp); 1215 if (!(sup->su_flags & SEGUSE_DIRTY)) 1216 --fs->lfs_nclean; 1217 sup->su_flags |= SEGUSE_DIRTY; 1218 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, offset), bp); 1219 nextserial = fs->lfs_serial + 1; 1220 while ((offset = check_segsum(fs, offset, nextserial, 1221 cred, CHECK_CKSUM, &flags, l)) > 0) { 1222 nextserial++; 1223 if (sntod(fs, oldoffset) != sntod(fs, offset)) { 1224 LFS_SEGENTRY(sup, fs, dtosn(fs, oldoffset), 1225 bp); 1226 if (!(sup->su_flags & SEGUSE_DIRTY)) 1227 --fs->lfs_nclean; 1228 sup->su_flags |= SEGUSE_DIRTY; 1229 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, oldoffset), 1230 bp); 1231 } 1232 1233 DLOG((DLOG_RF, "LFS roll forward phase 1: offset=0x%" 1234 PRIx64 "\n", offset)); 1235 if (flags & SS_DIROP) { 1236 DLOG((DLOG_RF, "lfs_mountfs: dirops at 0x%" 1237 PRIx64 "\n", oldoffset)); 1238 if (!(flags & SS_CONT)) 1239 DLOG((DLOG_RF, "lfs_mountfs: dirops end " 1240 "at 0x%" PRIx64 "\n", oldoffset)); 1241 } 1242 if (!(flags & SS_CONT)) 1243 lastgoodpseg = offset; 1244 oldoffset = offset; 1245 } 1246 if (flags & SS_CONT) { 1247 DLOG((DLOG_RF, "LFS roll forward: warning: incomplete " 1248 "dirops discarded\n")); 1249 } 1250 DLOG((DLOG_RF, "LFS roll forward phase 1: completed: " 1251 "lastgoodpseg=0x%" PRIx64 "\n", lastgoodpseg)); 1252 oldoffset = fs->lfs_offset; 1253 if (fs->lfs_offset != lastgoodpseg) { 1254 /* Don't overwrite what we're trying to preserve */ 1255 offset = fs->lfs_offset; 1256 fs->lfs_offset = lastgoodpseg; 1257 fs->lfs_curseg = sntod(fs, dtosn(fs, fs->lfs_offset)); 1258 for (sn = curseg = dtosn(fs, fs->lfs_curseg);;) { 1259 sn = (sn + 1) % fs->lfs_nseg; 1260 if (sn == curseg) 1261 panic("lfs_mountfs: no clean segments"); 1262 LFS_SEGENTRY(sup, fs, sn, bp); 1263 dirty = (sup->su_flags & SEGUSE_DIRTY); 1264 brelse(bp); 1265 if (!dirty) 1266 break; 1267 } 1268 fs->lfs_nextseg = sntod(fs, sn); 1269 1270 /* 1271 * Phase II: Roll forward from the first superblock. 1272 */ 1273 while (offset != lastgoodpseg) { 1274 DLOG((DLOG_RF, "LFS roll forward phase 2: 0x%" 1275 PRIx64 "\n", offset)); 1276 offset = check_segsum(fs, offset, 1277 fs->lfs_serial + 1, cred, CHECK_UPDATE, 1278 NULL, l); 1279 } 1280 1281 /* 1282 * Finish: flush our changes to disk. 1283 */ 1284 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1285 DLOG((DLOG_RF, "lfs_mountfs: roll forward ", 1286 "recovered %lld blocks\n", 1287 (long long)(lastgoodpseg - oldoffset))); 1288 } 1289 DLOG((DLOG_RF, "LFS roll forward complete\n")); 1290 } 1291 /* If writing, sb is not clean; record in case of immediate crash */ 1292 if (!fs->lfs_ronly) { 1293 fs->lfs_pflags &= ~LFS_PF_CLEAN; 1294 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1295 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1296 } 1297 1298 /* Allow vget now that roll-forward is complete */ 1299 fs->lfs_flags &= ~(LFS_NOTYET); 1300 wakeup(&fs->lfs_flags); 1301 1302 /* 1303 * Initialize the ifile cleaner info with information from 1304 * the superblock. 1305 */ 1306 LFS_CLEANERINFO(cip, fs, bp); 1307 cip->clean = fs->lfs_nclean; 1308 cip->dirty = fs->lfs_nseg - fs->lfs_nclean; 1309 cip->avail = fs->lfs_avail; 1310 cip->bfree = fs->lfs_bfree; 1311 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 1312 1313 /* 1314 * Mark the current segment as ACTIVE, since we're going to 1315 * be writing to it. 1316 */ 1317 LFS_SEGENTRY(sup, fs, dtosn(fs, fs->lfs_offset), bp); 1318 sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; 1319 fs->lfs_nactive++; 1320 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, fs->lfs_offset), bp); /* Ifile */ 1321 1322 /* Now that roll-forward is done, unlock the Ifile */ 1323 vput(vp); 1324 1325 /* Comment on ifile size if it is too large */ 1326 warn_ifile_size(fs); 1327 1328 /* Start the pagedaemon-anticipating daemon */ 1329 if (lfs_writer_daemon == 0 && 1330 kthread_create1(lfs_writerd, NULL, NULL, "lfs_writer") != 0) 1331 panic("fork lfs_writer"); 1332 1333 return (0); 1334 1335 out: 1336 if (bp) 1337 brelse(bp); 1338 if (abp) 1339 brelse(abp); 1340 if (ump) { 1341 free(ump->um_lfs, M_UFSMNT); 1342 free(ump, M_UFSMNT); 1343 mp->mnt_data = NULL; 1344 } 1345 1346 return (error); 1347 } 1348 1349 /* 1350 * unmount system call 1351 */ 1352 int 1353 lfs_unmount(struct mount *mp, int mntflags, struct lwp *l) 1354 { 1355 struct ufsmount *ump; 1356 struct lfs *fs; 1357 int error, flags, ronly; 1358 int s; 1359 1360 flags = 0; 1361 if (mntflags & MNT_FORCE) 1362 flags |= FORCECLOSE; 1363 1364 ump = VFSTOUFS(mp); 1365 fs = ump->um_lfs; 1366 1367 /* wake up the cleaner so it can die */ 1368 wakeup(&fs->lfs_nextseg); 1369 wakeup(&lfs_allclean_wakeup); 1370 simple_lock(&fs->lfs_interlock); 1371 while (fs->lfs_sleepers) 1372 ltsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers", 0, 1373 &fs->lfs_interlock); 1374 simple_unlock(&fs->lfs_interlock); 1375 1376 #ifdef QUOTA 1377 if (mp->mnt_flag & MNT_QUOTA) { 1378 int i; 1379 error = vflush(mp, fs->lfs_ivnode, SKIPSYSTEM|flags); 1380 if (error) 1381 return (error); 1382 for (i = 0; i < MAXQUOTAS; i++) { 1383 if (ump->um_quotas[i] == NULLVP) 1384 continue; 1385 quotaoff(l, mp, i); 1386 } 1387 /* 1388 * Here we fall through to vflush again to ensure 1389 * that we have gotten rid of all the system vnodes. 1390 */ 1391 } 1392 #endif 1393 if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) 1394 return (error); 1395 if ((error = VFS_SYNC(mp, 1, l->l_proc->p_ucred, l)) != 0) 1396 return (error); 1397 s = splbio(); 1398 if (LIST_FIRST(&fs->lfs_ivnode->v_dirtyblkhd)) 1399 panic("lfs_unmount: still dirty blocks on ifile vnode"); 1400 splx(s); 1401 1402 /* Comment on ifile size if it has become too large */ 1403 if (!(fs->lfs_flags & LFS_WARNED)) 1404 warn_ifile_size(fs); 1405 1406 /* Explicitly write the superblock, to update serial and pflags */ 1407 fs->lfs_pflags |= LFS_PF_CLEAN; 1408 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1409 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1410 simple_lock(&fs->lfs_interlock); 1411 while (fs->lfs_iocount) 1412 ltsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount", 0, 1413 &fs->lfs_interlock); 1414 simple_unlock(&fs->lfs_interlock); 1415 1416 /* Finish with the Ifile, now that we're done with it */ 1417 vrele(fs->lfs_ivnode); 1418 vgone(fs->lfs_ivnode); 1419 1420 ronly = !fs->lfs_ronly; 1421 if (ump->um_devvp->v_type != VBAD) 1422 ump->um_devvp->v_specmountpoint = NULL; 1423 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1424 error = VOP_CLOSE(ump->um_devvp, 1425 ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 1426 vput(ump->um_devvp); 1427 1428 /* Complain about page leakage */ 1429 if (fs->lfs_pages > 0) 1430 printf("lfs_unmount: still claim %d pages (%d in subsystem)\n", 1431 fs->lfs_pages, lfs_subsys_pages); 1432 1433 /* Free per-mount data structures */ 1434 free(fs->lfs_suflags[0], M_SEGMENT); 1435 free(fs->lfs_suflags[1], M_SEGMENT); 1436 free(fs->lfs_suflags, M_SEGMENT); 1437 lfs_free_resblks(fs); 1438 free(fs, M_UFSMNT); 1439 free(ump, M_UFSMNT); 1440 1441 mp->mnt_data = NULL; 1442 mp->mnt_flag &= ~MNT_LOCAL; 1443 return (error); 1444 } 1445 1446 /* 1447 * Get file system statistics. 1448 * 1449 * NB: We don't lock to access the superblock here, because it's not 1450 * really that important if we get it wrong. 1451 */ 1452 int 1453 lfs_statvfs(struct mount *mp, struct statvfs *sbp, struct lwp *l) 1454 { 1455 struct lfs *fs; 1456 struct ufsmount *ump; 1457 1458 ump = VFSTOUFS(mp); 1459 fs = ump->um_lfs; 1460 if (fs->lfs_magic != LFS_MAGIC) 1461 panic("lfs_statvfs: magic"); 1462 1463 sbp->f_bsize = fs->lfs_bsize; 1464 sbp->f_frsize = fs->lfs_fsize; 1465 sbp->f_iosize = fs->lfs_bsize; 1466 sbp->f_blocks = fsbtofrags(fs, LFS_EST_NONMETA(fs)); 1467 1468 sbp->f_bfree = fsbtofrags(fs, LFS_EST_BFREE(fs)); 1469 KASSERT(sbp->f_bfree <= fs->lfs_dsize); 1470 if (sbp->f_bfree < 0) 1471 sbp->f_bfree = 0; 1472 1473 sbp->f_bresvd = fsbtofrags(fs, LFS_EST_RSVD(fs)); 1474 if (sbp->f_bfree > sbp->f_bresvd) 1475 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1476 else 1477 sbp->f_bavail = 0; 1478 1479 sbp->f_files = fs->lfs_bfree / btofsb(fs, fs->lfs_ibsize) * INOPB(fs); 1480 sbp->f_ffree = sbp->f_files - fs->lfs_nfiles; 1481 sbp->f_favail = sbp->f_ffree; 1482 sbp->f_fresvd = 0; 1483 copy_statvfs_info(sbp, mp); 1484 return (0); 1485 } 1486 1487 /* 1488 * Go through the disk queues to initiate sandbagged IO; 1489 * go through the inodes to write those that have been modified; 1490 * initiate the writing of the super block if it has been modified. 1491 * 1492 * Note: we are always called with the filesystem marked `MPBUSY'. 1493 */ 1494 int 1495 lfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct lwp *l) 1496 { 1497 int error; 1498 struct lfs *fs; 1499 1500 fs = VFSTOUFS(mp)->um_lfs; 1501 if (fs->lfs_ronly) 1502 return 0; 1503 lfs_writer_enter(fs, "lfs_dirops"); 1504 1505 /* All syncs must be checkpoints until roll-forward is implemented. */ 1506 error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); 1507 lfs_writer_leave(fs); 1508 #ifdef QUOTA 1509 qsync(mp); 1510 #endif 1511 return (error); 1512 } 1513 1514 extern struct lock ufs_hashlock; 1515 1516 /* 1517 * Look up an LFS dinode number to find its incore vnode. If not already 1518 * in core, read it in from the specified device. Return the inode locked. 1519 * Detection and handling of mount points must be done by the calling routine. 1520 */ 1521 int 1522 lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1523 { 1524 struct lfs *fs; 1525 struct ufs1_dinode *dip; 1526 struct inode *ip; 1527 struct buf *bp; 1528 struct ifile *ifp; 1529 struct vnode *vp; 1530 struct ufsmount *ump; 1531 daddr_t daddr; 1532 dev_t dev; 1533 int error, retries; 1534 struct timespec ts; 1535 1536 ump = VFSTOUFS(mp); 1537 dev = ump->um_dev; 1538 fs = ump->um_lfs; 1539 1540 /* 1541 * If the filesystem is not completely mounted yet, suspend 1542 * any access requests (wait for roll-forward to complete). 1543 */ 1544 simple_lock(&fs->lfs_interlock); 1545 while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) 1546 ltsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet", 0, 1547 &fs->lfs_interlock); 1548 simple_unlock(&fs->lfs_interlock); 1549 1550 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1551 return (0); 1552 1553 if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, &vp)) != 0) { 1554 *vpp = NULL; 1555 return (error); 1556 } 1557 1558 do { 1559 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 1560 ungetnewvnode(vp); 1561 return (0); 1562 } 1563 } while (lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0)); 1564 1565 /* Translate the inode number to a disk address. */ 1566 if (ino == LFS_IFILE_INUM) 1567 daddr = fs->lfs_idaddr; 1568 else { 1569 /* XXX bounds-check this too */ 1570 LFS_IENTRY(ifp, fs, ino, bp); 1571 daddr = ifp->if_daddr; 1572 if (fs->lfs_version > 1) { 1573 ts.tv_sec = ifp->if_atime_sec; 1574 ts.tv_nsec = ifp->if_atime_nsec; 1575 } 1576 1577 brelse(bp); 1578 if (daddr == LFS_UNUSED_DADDR) { 1579 *vpp = NULLVP; 1580 ungetnewvnode(vp); 1581 lockmgr(&ufs_hashlock, LK_RELEASE, 0); 1582 return (ENOENT); 1583 } 1584 } 1585 1586 /* Allocate/init new vnode/inode. */ 1587 lfs_vcreate(mp, ino, vp); 1588 1589 /* 1590 * Put it onto its hash chain and lock it so that other requests for 1591 * this inode will block if they arrive while we are sleeping waiting 1592 * for old data structures to be purged or for the contents of the 1593 * disk portion of this inode to be read. 1594 */ 1595 ip = VTOI(vp); 1596 ufs_ihashins(ip); 1597 lockmgr(&ufs_hashlock, LK_RELEASE, 0); 1598 1599 /* 1600 * XXX 1601 * This may not need to be here, logically it should go down with 1602 * the i_devvp initialization. 1603 * Ask Kirk. 1604 */ 1605 ip->i_lfs = ump->um_lfs; 1606 1607 /* Read in the disk contents for the inode, copy into the inode. */ 1608 retries = 0; 1609 again: 1610 error = bread(ump->um_devvp, fsbtodb(fs, daddr), 1611 (fs->lfs_version == 1 ? fs->lfs_bsize : fs->lfs_ibsize), 1612 NOCRED, &bp); 1613 if (error) { 1614 /* 1615 * The inode does not contain anything useful, so it would 1616 * be misleading to leave it on its hash chain. With mode 1617 * still zero, it will be unlinked and returned to the free 1618 * list by vput(). 1619 */ 1620 vput(vp); 1621 brelse(bp); 1622 *vpp = NULL; 1623 return (error); 1624 } 1625 1626 dip = lfs_ifind(fs, ino, bp); 1627 if (dip == NULL) { 1628 /* Assume write has not completed yet; try again */ 1629 bp->b_flags |= B_INVAL; 1630 brelse(bp); 1631 ++retries; 1632 if (retries > LFS_IFIND_RETRIES) { 1633 #ifdef DEBUG 1634 /* If the seglock is held look at the bpp to see 1635 what is there anyway */ 1636 simple_lock(&fs->lfs_interlock); 1637 if (fs->lfs_seglock > 0) { 1638 struct buf **bpp; 1639 struct ufs1_dinode *dp; 1640 int i; 1641 1642 for (bpp = fs->lfs_sp->bpp; 1643 bpp != fs->lfs_sp->cbpp; ++bpp) { 1644 if ((*bpp)->b_vp == fs->lfs_ivnode && 1645 bpp != fs->lfs_sp->bpp) { 1646 /* Inode block */ 1647 printf("lfs_vget: block 0x%" PRIx64 ": ", 1648 (*bpp)->b_blkno); 1649 dp = (struct ufs1_dinode *)(*bpp)->b_data; 1650 for (i = 0; i < INOPB(fs); i++) 1651 if (dp[i].di_u.inumber) 1652 printf("%d ", dp[i].di_u.inumber); 1653 printf("\n"); 1654 } 1655 } 1656 } 1657 simple_unlock(&fs->lfs_interlock); 1658 #endif /* DEBUG */ 1659 panic("lfs_vget: dinode not found"); 1660 } 1661 simple_lock(&fs->lfs_interlock); 1662 if (fs->lfs_iocount) { 1663 DLOG((DLOG_VNODE, "lfs_vget: dinode %d not found, retrying...\n", ino)); 1664 (void)ltsleep(&fs->lfs_iocount, PRIBIO + 1, 1665 "lfs ifind", 1, &fs->lfs_interlock); 1666 } else 1667 retries = LFS_IFIND_RETRIES; 1668 simple_unlock(&fs->lfs_interlock); 1669 goto again; 1670 } 1671 *ip->i_din.ffs1_din = *dip; 1672 brelse(bp); 1673 1674 if (fs->lfs_version > 1) { 1675 ip->i_ffs1_atime = ts.tv_sec; 1676 ip->i_ffs1_atimensec = ts.tv_nsec; 1677 } 1678 1679 lfs_vinit(mp, &vp); 1680 1681 *vpp = vp; 1682 1683 KASSERT(VOP_ISLOCKED(vp)); 1684 1685 return (0); 1686 } 1687 1688 /* 1689 * File handle to vnode 1690 */ 1691 int 1692 lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1693 { 1694 struct lfid *lfhp; 1695 struct buf *bp; 1696 IFILE *ifp; 1697 int32_t daddr; 1698 struct lfs *fs; 1699 1700 lfhp = (struct lfid *)fhp; 1701 if (lfhp->lfid_ino < LFS_IFILE_INUM) 1702 return ESTALE; 1703 1704 fs = VFSTOUFS(mp)->um_lfs; 1705 if (lfhp->lfid_ident != fs->lfs_ident) 1706 return ESTALE; 1707 1708 if (lfhp->lfid_ino > 1709 ((VTOI(fs->lfs_ivnode)->i_ffs1_size >> fs->lfs_bshift) - 1710 fs->lfs_cleansz - fs->lfs_segtabsz) * fs->lfs_ifpb) 1711 return ESTALE; 1712 1713 if (ufs_ihashlookup(VFSTOUFS(mp)->um_dev, lfhp->lfid_ino) == NULLVP) { 1714 LFS_IENTRY(ifp, fs, lfhp->lfid_ino, bp); 1715 daddr = ifp->if_daddr; 1716 brelse(bp); 1717 if (daddr == LFS_UNUSED_DADDR) 1718 return ESTALE; 1719 } 1720 1721 return (ufs_fhtovp(mp, &lfhp->lfid_ufid, vpp)); 1722 } 1723 1724 /* 1725 * Vnode pointer to File handle 1726 */ 1727 /* ARGSUSED */ 1728 int 1729 lfs_vptofh(struct vnode *vp, struct fid *fhp) 1730 { 1731 struct inode *ip; 1732 struct lfid *lfhp; 1733 1734 ip = VTOI(vp); 1735 lfhp = (struct lfid *)fhp; 1736 lfhp->lfid_len = sizeof(struct lfid); 1737 lfhp->lfid_ino = ip->i_number; 1738 lfhp->lfid_gen = ip->i_gen; 1739 lfhp->lfid_ident = ip->i_lfs->lfs_ident; 1740 return (0); 1741 } 1742 1743 static int 1744 sysctl_lfs_dostats(SYSCTLFN_ARGS) 1745 { 1746 extern struct lfs_stats lfs_stats; 1747 extern int lfs_dostats; 1748 int error; 1749 1750 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 1751 if (error || newp == NULL) 1752 return (error); 1753 1754 if (lfs_dostats == 0) 1755 memset(&lfs_stats, 0, sizeof(lfs_stats)); 1756 1757 return (0); 1758 } 1759 1760 struct shortlong { 1761 const char *sname; 1762 const char *lname; 1763 }; 1764 1765 SYSCTL_SETUP(sysctl_vfs_lfs_setup, "sysctl vfs.lfs subtree setup") 1766 { 1767 int i; 1768 extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead, 1769 lfs_fs_pagetrip; 1770 #ifdef DEBUG 1771 extern int lfs_debug_log_subsys[DLOG_MAX]; 1772 struct shortlong dlog_names[DLOG_MAX] = { /* Must match lfs.h ! */ 1773 { "rollforward", "Debug roll-forward code" }, 1774 { "alloc", "Debug inode allocation and free list" }, 1775 { "avail", "Debug space-available-now accounting" }, 1776 { "flush", "Debug flush triggers" }, 1777 { "lockedlist", "Debug locked list accounting" }, 1778 { "vnode_verbose", "Verbose per-vnode-written debugging" }, 1779 { "vnode", "Debug vnode use during segment write" }, 1780 { "segment", "Debug segment writing" }, 1781 { "seguse", "Debug segment used-bytes accounting" }, 1782 { "cleaner", "Debug cleaning routines" }, 1783 { "mount", "Debug mount/unmount routines" }, 1784 { "pagecache", "Debug UBC interactions" }, 1785 { "dirop", "Debug directory-operation accounting" }, 1786 { "malloc", "Debug private malloc accounting" }, 1787 }; 1788 #endif /* DEBUG */ 1789 struct shortlong stat_names[] = { /* Must match lfs.h! */ 1790 { "segsused", "Number of new segments allocated" }, 1791 { "psegwrites", "Number of partial-segment writes" }, 1792 { "psyncwrites", "Number of synchronous partial-segment" 1793 " writes" }, 1794 { "pcleanwrites", "Number of partial-segment writes by the" 1795 " cleaner" }, 1796 { "blocktot", "Number of blocks written" }, 1797 { "cleanblocks", "Number of blocks written by the cleaner" }, 1798 { "ncheckpoints", "Number of checkpoints made" }, 1799 { "nwrites", "Number of whole writes" }, 1800 { "nsync_writes", "Number of synchronous writes" }, 1801 { "wait_exceeded", "Number of times writer waited for" 1802 " cleaner" }, 1803 { "write_exceeded", "Number of times writer invoked flush" }, 1804 { "flush_invoked", "Number of times flush was invoked" }, 1805 { "vflush_invoked", "Number of time vflush was called" }, 1806 { "clean_inlocked", "Number of vnodes skipped for VXLOCK" }, 1807 { "clean_vnlocked", "Number of vnodes skipped for vget failure" }, 1808 { "segs_reclaimed", "Number of segments reclaimed" }, 1809 }; 1810 1811 sysctl_createv(clog, 0, NULL, NULL, 1812 CTLFLAG_PERMANENT, 1813 CTLTYPE_NODE, "vfs", NULL, 1814 NULL, 0, NULL, 0, 1815 CTL_VFS, CTL_EOL); 1816 sysctl_createv(clog, 0, NULL, NULL, 1817 CTLFLAG_PERMANENT, 1818 CTLTYPE_NODE, "lfs", 1819 SYSCTL_DESCR("Log-structured file system"), 1820 NULL, 0, NULL, 0, 1821 CTL_VFS, 5, CTL_EOL); 1822 /* 1823 * XXX the "5" above could be dynamic, thereby eliminating one 1824 * more instance of the "number to vfs" mapping problem, but 1825 * "5" is the order as taken from sys/mount.h 1826 */ 1827 1828 sysctl_createv(clog, 0, NULL, NULL, 1829 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1830 CTLTYPE_INT, "flushindir", NULL, 1831 NULL, 0, &lfs_writeindir, 0, 1832 CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); 1833 sysctl_createv(clog, 0, NULL, NULL, 1834 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1835 CTLTYPE_INT, "clean_vnhead", NULL, 1836 NULL, 0, &lfs_clean_vnhead, 0, 1837 CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); 1838 sysctl_createv(clog, 0, NULL, NULL, 1839 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1840 CTLTYPE_INT, "dostats", 1841 SYSCTL_DESCR("Maintain statistics on LFS operations"), 1842 sysctl_lfs_dostats, 0, &lfs_dostats, 0, 1843 CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); 1844 sysctl_createv(clog, 0, NULL, NULL, 1845 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1846 CTLTYPE_INT, "pagetrip", 1847 SYSCTL_DESCR("How many dirty pages in fs triggers" 1848 " a flush"), 1849 NULL, 0, &lfs_fs_pagetrip, 0, 1850 CTL_VFS, 5, LFS_FS_PAGETRIP, CTL_EOL); 1851 sysctl_createv(clog, 0, NULL, NULL, 1852 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1853 CTLTYPE_INT, "rfw", 1854 SYSCTL_DESCR("Use in-kernel roll-forward on mount"), 1855 NULL, 0, &lfs_do_rfw, 0, 1856 CTL_VFS, 5, LFS_DO_RFW, CTL_EOL); 1857 1858 sysctl_createv(clog, 0, NULL, NULL, 1859 CTLFLAG_PERMANENT, 1860 CTLTYPE_NODE, "stats", 1861 SYSCTL_DESCR("Debugging options"), 1862 NULL, 0, NULL, 0, 1863 CTL_VFS, 5, LFS_STATS, CTL_EOL); 1864 for (i = 0; i < sizeof(struct lfs_stats) / sizeof(u_int); i++) { 1865 sysctl_createv(clog, 0, NULL, NULL, 1866 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 1867 CTLTYPE_INT, stat_names[i].sname, 1868 SYSCTL_DESCR(stat_names[i].lname), 1869 NULL, 0, &(((u_int *)&lfs_stats.segsused)[i]), 1870 0, CTL_VFS, 5, LFS_STATS, i, CTL_EOL); 1871 } 1872 1873 #ifdef DEBUG 1874 sysctl_createv(clog, 0, NULL, NULL, 1875 CTLFLAG_PERMANENT, 1876 CTLTYPE_NODE, "debug", 1877 SYSCTL_DESCR("Debugging options"), 1878 NULL, 0, NULL, 0, 1879 CTL_VFS, 5, LFS_DEBUGLOG, CTL_EOL); 1880 for (i = 0; i < DLOG_MAX; i++) { 1881 sysctl_createv(clog, 0, NULL, NULL, 1882 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1883 CTLTYPE_INT, dlog_names[i].sname, 1884 SYSCTL_DESCR(dlog_names[i].lname), 1885 NULL, 0, &(lfs_debug_log_subsys[i]), 0, 1886 CTL_VFS, 5, LFS_DEBUGLOG, i, CTL_EOL); 1887 } 1888 #endif 1889 } 1890 1891 /* 1892 * ufs_bmaparray callback function for writing. 1893 * 1894 * Since blocks will be written to the new segment anyway, 1895 * we don't care about current daddr of them. 1896 */ 1897 static boolean_t 1898 lfs_issequential_hole(const struct ufsmount *ump, 1899 daddr_t daddr0, daddr_t daddr1) 1900 { 1901 daddr0 = (daddr_t)((int32_t)daddr0); /* XXX ondisk32 */ 1902 daddr1 = (daddr_t)((int32_t)daddr1); /* XXX ondisk32 */ 1903 1904 KASSERT(daddr0 == UNWRITTEN || 1905 (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR)); 1906 KASSERT(daddr1 == UNWRITTEN || 1907 (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR)); 1908 1909 /* NOTE: all we want to know here is 'hole or not'. */ 1910 /* NOTE: UNASSIGNED is converted to 0 by ufs_bmaparray. */ 1911 1912 /* 1913 * treat UNWRITTENs and all resident blocks as 'contiguous' 1914 */ 1915 if (daddr0 != 0 && daddr1 != 0) 1916 return TRUE; 1917 1918 /* 1919 * both are in hole? 1920 */ 1921 if (daddr0 == 0 && daddr1 == 0) 1922 return TRUE; /* all holes are 'contiguous' for us. */ 1923 1924 return FALSE; 1925 } 1926 1927 /* 1928 * lfs_gop_write functions exactly like genfs_gop_write, except that 1929 * (1) it requires the seglock to be held by its caller, and sp->fip 1930 * to be properly initialized (it will return without re-initializing 1931 * sp->fip, and without calling lfs_writeseg). 1932 * (2) it uses the remaining space in the segment, rather than VOP_BMAP, 1933 * to determine how large a block it can write at once (though it does 1934 * still use VOP_BMAP to find holes in the file); 1935 * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks 1936 * (leaving lfs_writeseg to deal with the cluster blocks, so we might 1937 * now have clusters of clusters, ick.) 1938 */ 1939 static int 1940 lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, int flags) 1941 { 1942 int i, s, error, run; 1943 int fs_bshift; 1944 vaddr_t kva; 1945 off_t eof, offset, startoffset = 0; 1946 size_t bytes, iobytes, skipbytes; 1947 daddr_t lbn, blkno; 1948 struct vm_page *pg; 1949 struct buf *mbp, *bp; 1950 struct vnode *devvp = VTOI(vp)->i_devvp; 1951 struct inode *ip = VTOI(vp); 1952 struct lfs *fs = ip->i_lfs; 1953 struct segment *sp = fs->lfs_sp; 1954 UVMHIST_FUNC("lfs_gop_write"); UVMHIST_CALLED(ubchist); 1955 1956 ASSERT_SEGLOCK(fs); 1957 1958 /* The Ifile lives in the buffer cache */ 1959 KASSERT(vp != fs->lfs_ivnode); 1960 1961 /* 1962 * Sometimes things slip past the filters in lfs_putpages, 1963 * and the pagedaemon tries to write pages---problem is 1964 * that the pagedaemon never acquires the segment lock. 1965 * 1966 * Alternatively, pages that were clean when we called 1967 * genfs_putpages may have become dirty in the meantime. In this 1968 * case the segment header is not properly set up for blocks 1969 * to be added to it. 1970 * 1971 * Unbusy and unclean the pages, and put them on the ACTIVE 1972 * queue under the hypothesis that they couldn't have got here 1973 * unless they were modified *quite* recently. 1974 * 1975 * XXXUBC that last statement is an oversimplification of course. 1976 */ 1977 if (!LFS_SEGLOCK_HELD(fs) || 1978 (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) || 1979 (pgs[0]->offset & fs->lfs_bmask) != 0) { 1980 goto tryagain; 1981 } 1982 1983 UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x", 1984 vp, pgs, npages, flags); 1985 1986 GOP_SIZE(vp, vp->v_size, &eof, GOP_SIZE_WRITE); 1987 1988 if (vp->v_type == VREG) 1989 fs_bshift = vp->v_mount->mnt_fs_bshift; 1990 else 1991 fs_bshift = DEV_BSHIFT; 1992 error = 0; 1993 pg = pgs[0]; 1994 startoffset = pg->offset; 1995 if (startoffset >= eof) { 1996 goto tryagain; 1997 } else 1998 bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); 1999 skipbytes = 0; 2000 2001 KASSERT(bytes != 0); 2002 2003 /* Swap PG_DELWRI for PG_PAGEOUT */ 2004 for (i = 0; i < npages; i++) 2005 if (pgs[i]->flags & PG_DELWRI) { 2006 KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); 2007 pgs[i]->flags &= ~PG_DELWRI; 2008 pgs[i]->flags |= PG_PAGEOUT; 2009 uvmexp.paging++; 2010 uvm_lock_pageq(); 2011 uvm_pageunwire(pgs[i]); 2012 uvm_unlock_pageq(); 2013 } 2014 2015 /* 2016 * Check to make sure we're starting on a block boundary. 2017 * We'll check later to make sure we always write entire 2018 * blocks (or fragments). 2019 */ 2020 if (startoffset & fs->lfs_bmask) 2021 printf("%" PRId64 " & %" PRId64 " = %" PRId64 "\n", 2022 startoffset, fs->lfs_bmask, 2023 startoffset & fs->lfs_bmask); 2024 KASSERT((startoffset & fs->lfs_bmask) == 0); 2025 if (bytes & fs->lfs_ffmask) { 2026 printf("lfs_gop_write: asked to write %ld bytes\n", (long)bytes); 2027 panic("lfs_gop_write: non-integer blocks"); 2028 } 2029 2030 /* 2031 * We could deadlock here on pager_map with UVMPAGER_MAPIN_WAITOK. 2032 * If we would, write what we have and try again. If we don't 2033 * have anything to write, we'll have to sleep. 2034 */ 2035 if ((kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 2036 (((SEGSUM *)(sp->segsum))->ss_nfinfo < 1 ? 2037 UVMPAGER_MAPIN_WAITOK : 0))) == 0x0) { 2038 int vers; 2039 2040 DLOG((DLOG_PAGE, "lfs_gop_write: forcing write\n")); 2041 #if 0 2042 " with nfinfo=%d at offset 0x%x\n", 2043 (int)((SEGSUM *)(sp->segsum))->ss_nfinfo, 2044 (unsigned)fs->lfs_offset)); 2045 #endif 2046 if (sp->fip->fi_nblocks == 0) { 2047 /* Don't write zero-length finfos */ 2048 --((SEGSUM *)(sp->segsum))->ss_nfinfo; 2049 sp->sum_bytes_left += FINFOSIZE; 2050 } else 2051 lfs_updatemeta(sp); 2052 2053 vers = sp->fip->fi_version; 2054 (void) lfs_writeseg(fs, sp); 2055 2056 sp->fip->fi_version = vers; 2057 sp->fip->fi_ino = ip->i_number; 2058 /* Add the current file to the segment summary. */ 2059 ++((SEGSUM *)(sp->segsum))->ss_nfinfo; 2060 sp->sum_bytes_left -= FINFOSIZE; 2061 2062 /* 2063 * Having given up all of the pager_map we were holding, 2064 * we can now wait for aiodoned to reclaim it for us 2065 * without fear of deadlock. 2066 */ 2067 kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 2068 UVMPAGER_MAPIN_WAITOK); 2069 } 2070 2071 s = splbio(); 2072 simple_lock(&global_v_numoutput_slock); 2073 vp->v_numoutput += 2; /* one for biodone, one for aiodone */ 2074 simple_unlock(&global_v_numoutput_slock); 2075 mbp = pool_get(&bufpool, PR_WAITOK); 2076 splx(s); 2077 2078 memset(mbp, 0, sizeof(*bp)); 2079 BUF_INIT(mbp); 2080 UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x", 2081 vp, mbp, vp->v_numoutput, bytes); 2082 mbp->b_bufsize = npages << PAGE_SHIFT; 2083 mbp->b_data = (void *)kva; 2084 mbp->b_resid = mbp->b_bcount = bytes; 2085 mbp->b_flags = B_BUSY|B_WRITE|B_AGE|B_CALL; 2086 mbp->b_iodone = uvm_aio_biodone; 2087 mbp->b_vp = vp; 2088 2089 bp = NULL; 2090 for (offset = startoffset; 2091 bytes > 0; 2092 offset += iobytes, bytes -= iobytes) { 2093 lbn = offset >> fs_bshift; 2094 error = ufs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, 2095 lfs_issequential_hole); 2096 if (error) { 2097 UVMHIST_LOG(ubchist, "ufs_bmaparray() -> %d", 2098 error,0,0,0); 2099 skipbytes += bytes; 2100 bytes = 0; 2101 break; 2102 } 2103 2104 iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, 2105 bytes); 2106 if (blkno == (daddr_t)-1) { 2107 skipbytes += iobytes; 2108 continue; 2109 } 2110 2111 /* 2112 * Discover how much we can really pack into this buffer. 2113 */ 2114 /* If no room in the current segment, finish it up */ 2115 if (sp->sum_bytes_left < sizeof(int32_t) || 2116 sp->seg_bytes_left < (1 << fs->lfs_bshift)) { 2117 int vers; 2118 2119 lfs_updatemeta(sp); 2120 2121 vers = sp->fip->fi_version; 2122 (void) lfs_writeseg(fs, sp); 2123 2124 sp->fip->fi_version = vers; 2125 sp->fip->fi_ino = ip->i_number; 2126 /* Add the current file to the segment summary. */ 2127 ++((SEGSUM *)(sp->segsum))->ss_nfinfo; 2128 sp->sum_bytes_left -= FINFOSIZE; 2129 } 2130 /* Check both for space in segment and space in segsum */ 2131 iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) 2132 << fs_bshift); 2133 iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) 2134 << fs_bshift); 2135 KASSERT(iobytes > 0); 2136 2137 /* if it's really one i/o, don't make a second buf */ 2138 if (offset == startoffset && iobytes == bytes) { 2139 bp = mbp; 2140 /* correct overcount if there is no second buffer */ 2141 s = splbio(); 2142 simple_lock(&global_v_numoutput_slock); 2143 --vp->v_numoutput; 2144 simple_unlock(&global_v_numoutput_slock); 2145 splx(s); 2146 } else { 2147 s = splbio(); 2148 bp = pool_get(&bufpool, PR_WAITOK); 2149 UVMHIST_LOG(ubchist, "vp %p bp %p num now %d", 2150 vp, bp, vp->v_numoutput, 0); 2151 splx(s); 2152 memset(bp, 0, sizeof(*bp)); 2153 BUF_INIT(bp); 2154 bp->b_data = (char *)kva + 2155 (vaddr_t)(offset - pg->offset); 2156 bp->b_resid = bp->b_bcount = iobytes; 2157 bp->b_flags = B_BUSY|B_WRITE|B_CALL; 2158 bp->b_iodone = uvm_aio_biodone1; 2159 } 2160 2161 /* XXX This is silly ... is this necessary? */ 2162 bp->b_vp = NULL; 2163 s = splbio(); 2164 bgetvp(vp, bp); 2165 splx(s); 2166 2167 bp->b_lblkno = lblkno(fs, offset); 2168 bp->b_private = mbp; 2169 if (devvp->v_type == VBLK) { 2170 bp->b_dev = devvp->v_rdev; 2171 } 2172 VOP_BWRITE(bp); 2173 while (lfs_gatherblock(sp, bp, NULL)) 2174 continue; 2175 } 2176 2177 if (skipbytes) { 2178 UVMHIST_LOG(ubchist, "skipbytes %d", skipbytes, 0,0,0); 2179 s = splbio(); 2180 if (error) { 2181 mbp->b_flags |= B_ERROR; 2182 mbp->b_error = error; 2183 } 2184 mbp->b_resid -= skipbytes; 2185 if (mbp->b_resid == 0) { 2186 biodone(mbp); 2187 } 2188 splx(s); 2189 } 2190 UVMHIST_LOG(ubchist, "returning 0", 0,0,0,0); 2191 return (0); 2192 2193 tryagain: 2194 /* 2195 * We can't write the pages, for whatever reason. 2196 * Clean up after ourselves, and make the caller try again. 2197 */ 2198 simple_lock(&vp->v_interlock); 2199 2200 /* Tell why we're here, if we know */ 2201 if (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) 2202 DLOG((DLOG_PAGE, "lfs_gop_write: clean pages dirtied\n")); 2203 else if ((pgs[0]->offset & fs->lfs_bmask) != 0) 2204 DLOG((DLOG_PAGE, "lfs_gop_write: not on block boundary\n")); 2205 else if (startoffset >= eof) 2206 DLOG((DLOG_PAGE, "lfs_gop_write: ino %d start 0x%" PRIx64 2207 " eof 0x%" PRIx64 " npages=%d\n", VTOI(vp)->i_number, 2208 pgs[0]->offset, eof, npages)); 2209 else 2210 DLOG((DLOG_PAGE, "lfs_gop_write: seglock not held\n")); 2211 2212 uvm_lock_pageq(); 2213 for (i = 0; i < npages; i++) { 2214 pg = pgs[i]; 2215 2216 if (pg->flags & PG_PAGEOUT) 2217 uvmexp.paging--; 2218 if (pg->flags & PG_DELWRI) { 2219 uvm_pageunwire(pg); 2220 } 2221 uvm_pageactivate(pg); 2222 pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); 2223 DLOG((DLOG_PAGE, "pg[%d] = %p\n", i, pg)); 2224 DLOG((DLOG_PAGE, "pg[%d]->flags = %x\n", i, pg->flags)); 2225 DLOG((DLOG_PAGE, "pg[%d]->pqflags = %x\n", i, pg->pqflags)); 2226 DLOG((DLOG_PAGE, "pg[%d]->uanon = %p\n", i, pg->uanon)); 2227 DLOG((DLOG_PAGE, "pg[%d]->uobject = %p\n", i, pg->uobject)); 2228 DLOG((DLOG_PAGE, "pg[%d]->wire_count = %d\n", i, 2229 pg->wire_count)); 2230 DLOG((DLOG_PAGE, "pg[%d]->loan_count = %d\n", i, 2231 pg->loan_count)); 2232 } 2233 /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ 2234 uvm_page_unbusy(pgs, npages); 2235 uvm_unlock_pageq(); 2236 simple_unlock(&vp->v_interlock); 2237 return EAGAIN; 2238 } 2239 2240 /* 2241 * finish vnode/inode initialization. 2242 * used by lfs_vget and lfs_fastvget. 2243 */ 2244 void 2245 lfs_vinit(struct mount *mp, struct vnode **vpp) 2246 { 2247 struct vnode *vp = *vpp; 2248 struct inode *ip = VTOI(vp); 2249 struct ufsmount *ump = VFSTOUFS(mp); 2250 int i; 2251 2252 ip->i_mode = ip->i_ffs1_mode; 2253 ip->i_ffs_effnlink = ip->i_nlink = ip->i_ffs1_nlink; 2254 ip->i_lfs_osize = ip->i_size = ip->i_ffs1_size; 2255 ip->i_flags = ip->i_ffs1_flags; 2256 ip->i_gen = ip->i_ffs1_gen; 2257 ip->i_uid = ip->i_ffs1_uid; 2258 ip->i_gid = ip->i_ffs1_gid; 2259 2260 ip->i_lfs_effnblks = ip->i_ffs1_blocks; 2261 2262 /* 2263 * Initialize the vnode from the inode, check for aliases. In all 2264 * cases re-init ip, the underlying vnode/inode may have changed. 2265 */ 2266 ufs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); 2267 ip = VTOI(vp); 2268 2269 memset(ip->i_lfs_fragsize, 0, NDADDR * sizeof(*ip->i_lfs_fragsize)); 2270 if (vp->v_type != VLNK || ip->i_size >= ip->i_ump->um_maxsymlinklen) { 2271 struct lfs *fs = ump->um_lfs; 2272 #ifdef DEBUG 2273 for (i = (ip->i_size + fs->lfs_bsize - 1) >> fs->lfs_bshift; 2274 i < NDADDR; i++) { 2275 if ((vp->v_type == VBLK || vp->v_type == VCHR) && 2276 i == 0) 2277 continue; 2278 if (ip->i_ffs1_db[i] != 0) { 2279 inconsistent: 2280 lfs_dump_dinode(ip->i_din.ffs1_din); 2281 panic("inconsistent inode"); 2282 } 2283 } 2284 for ( ; i < NDADDR + NIADDR; i++) { 2285 if (ip->i_ffs1_ib[i - NDADDR] != 0) { 2286 goto inconsistent; 2287 } 2288 } 2289 #endif /* DEBUG */ 2290 for (i = 0; i < NDADDR; i++) 2291 if (ip->i_ffs1_db[i] != 0) 2292 ip->i_lfs_fragsize[i] = blksize(fs, ip, i); 2293 } 2294 2295 #ifdef DIAGNOSTIC 2296 if (vp->v_type == VNON) { 2297 # ifdef DEBUG 2298 lfs_dump_dinode(ip->i_din.ffs1_din); 2299 # endif 2300 panic("lfs_vinit: ino %llu is type VNON! (ifmt=%o)\n", 2301 (unsigned long long)ip->i_number, 2302 (ip->i_mode & IFMT) >> 12); 2303 } 2304 #endif /* DIAGNOSTIC */ 2305 2306 /* 2307 * Finish inode initialization now that aliasing has been resolved. 2308 */ 2309 2310 ip->i_devvp = ump->um_devvp; 2311 VREF(ip->i_devvp); 2312 genfs_node_init(vp, &lfs_genfsops); 2313 uvm_vnp_setsize(vp, ip->i_size); 2314 2315 /* Initialize hiblk from file size */ 2316 ip->i_lfs_hiblk = lblkno(ip->i_lfs, ip->i_size + ip->i_lfs->lfs_bsize - 1) - 1; 2317 2318 *vpp = vp; 2319 } 2320 2321 /* 2322 * Warn if the inode portion of the Ifile is too large to be contained 2323 * in the buffer cache, according to LFS_MAX_BUFS / LFS_MAX_BYTES. 2324 * XXX the estimates don't take multiple LFSs into account. 2325 */ 2326 static void 2327 warn_ifile_size(struct lfs *fs) 2328 { 2329 KASSERT(LFS_MAX_BUFS > 0); 2330 KASSERT(LFS_MAX_BYTES > 0); 2331 if (((fs->lfs_ivnode->v_size >> fs->lfs_bshift) - fs->lfs_segtabsz) > 2332 LFS_MAX_BUFS) { 2333 simple_lock(&fs->lfs_interlock); 2334 fs->lfs_flags |= LFS_WARNED; 2335 simple_unlock(&fs->lfs_interlock); 2336 log(LOG_WARNING, "lfs_mountfs: inode part of ifile of length %" 2337 PRId64 " cannot fit in %d buffers\n", 2338 fs->lfs_ivnode->v_size - 2339 (fs->lfs_segtabsz << fs->lfs_bshift), 2340 LFS_MAX_BUFS); 2341 log(LOG_WARNING, "lfs_mountfs: please consider increasing NBUF" 2342 " to at least %" PRId64 "\n", 2343 LFS_INVERSE_MAX_BUFS((fs->lfs_ivnode->v_size >> 2344 fs->lfs_bshift) - 2345 fs->lfs_segtabsz)); 2346 } else if ((fs->lfs_ivnode->v_size >> fs->lfs_bshift) > LFS_MAX_BUFS) { 2347 /* Same thing but LOG_NOTICE */ 2348 simple_lock(&fs->lfs_interlock); 2349 fs->lfs_flags |= LFS_WARNED; 2350 simple_unlock(&fs->lfs_interlock); 2351 log(LOG_NOTICE, "lfs_mountfs: entire ifile of length %" 2352 PRId64 " cannot fit in %d buffers\n", 2353 fs->lfs_ivnode->v_size, LFS_MAX_BUFS); 2354 log(LOG_NOTICE, "lfs_mountfs: please consider increasing NBUF" 2355 " to at least %" PRId64 "\n", 2356 LFS_INVERSE_MAX_BUFS(fs->lfs_ivnode->v_size >> 2357 fs->lfs_bshift)); 2358 } 2359 2360 if (fs->lfs_ivnode->v_size - (fs->lfs_segtabsz << fs->lfs_bshift) > 2361 LFS_MAX_BYTES) { 2362 simple_lock(&fs->lfs_interlock); 2363 fs->lfs_flags |= LFS_WARNED; 2364 simple_unlock(&fs->lfs_interlock); 2365 log(LOG_WARNING, "lfs_mountfs: inode part of ifile of length %" 2366 PRId64 " cannot fit in %lu bytes\n", 2367 fs->lfs_ivnode->v_size - (fs->lfs_segtabsz << 2368 fs->lfs_bshift), 2369 LFS_MAX_BYTES); 2370 log(LOG_WARNING, "lfs_mountfs: please consider increasing" 2371 " BUFPAGES to at least %" PRId64 "\n", 2372 LFS_INVERSE_MAX_BYTES(fs->lfs_ivnode->v_size - 2373 (fs->lfs_segtabsz << 2374 fs->lfs_bshift)) >> 2375 PAGE_SHIFT); 2376 } else if(fs->lfs_ivnode->v_size > LFS_MAX_BYTES) { 2377 simple_lock(&fs->lfs_interlock); 2378 fs->lfs_flags |= LFS_WARNED; 2379 simple_unlock(&fs->lfs_interlock); 2380 log(LOG_NOTICE, "lfs_mountfs: entire ifile of length %" PRId64 2381 " cannot fit in %lu buffer bytes\n", 2382 fs->lfs_ivnode->v_size, LFS_MAX_BYTES); 2383 log(LOG_NOTICE, "lfs_mountfs: please consider increasing" 2384 " BUFPAGES to at least %" PRId64 "\n", 2385 LFS_INVERSE_MAX_BYTES(fs->lfs_ivnode->v_size - 2386 (fs->lfs_segtabsz << 2387 fs->lfs_bshift)) >> 2388 PAGE_SHIFT); 2389 } 2390 } 2391 2392 /* 2393 * Resize the filesystem to contain the specified number of segments. 2394 */ 2395 int 2396 lfs_resize_fs(struct lfs *fs, int newnsegs) 2397 { 2398 SEGUSE *sup; 2399 struct buf *bp, *obp; 2400 daddr_t olast, nlast, ilast, noff, start, end; 2401 struct vnode *ivp; 2402 struct inode *ip; 2403 int error, badnews, inc, oldnsegs; 2404 int sbbytes, csbbytes, gain, cgain; 2405 int i; 2406 2407 /* Only support v2 and up */ 2408 if (fs->lfs_version < 2) 2409 return EOPNOTSUPP; 2410 2411 /* If we're doing nothing, do it fast */ 2412 oldnsegs = fs->lfs_nseg; 2413 if (newnsegs == oldnsegs) 2414 return 0; 2415 2416 /* We always have to have two superblocks */ 2417 if (newnsegs <= dtosn(fs, fs->lfs_sboffs[1])) 2418 return EFBIG; 2419 2420 ivp = fs->lfs_ivnode; 2421 ip = VTOI(ivp); 2422 error = 0; 2423 2424 /* Take the segment lock so no one else calls lfs_newseg() */ 2425 lfs_seglock(fs, SEGM_PROT); 2426 2427 /* 2428 * Make sure the segments we're going to be losing, if any, 2429 * are in fact empty. We hold the seglock, so their status 2430 * cannot change underneath us. Count the superblocks we lose, 2431 * while we're at it. 2432 */ 2433 sbbytes = csbbytes = 0; 2434 cgain = 0; 2435 for (i = newnsegs; i < oldnsegs; i++) { 2436 LFS_SEGENTRY(sup, fs, i, bp); 2437 badnews = sup->su_nbytes || !(sup->su_flags & SEGUSE_INVAL); 2438 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2439 sbbytes += LFS_SBPAD; 2440 if (!(sup->su_flags & SEGUSE_DIRTY)) { 2441 ++cgain; 2442 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2443 csbbytes += LFS_SBPAD; 2444 } 2445 brelse(bp); 2446 if (badnews) { 2447 error = EBUSY; 2448 goto out; 2449 } 2450 } 2451 2452 /* Note old and new segment table endpoints, and old ifile size */ 2453 olast = fs->lfs_cleansz + fs->lfs_segtabsz; 2454 nlast = howmany(newnsegs, fs->lfs_sepb) + fs->lfs_cleansz; 2455 ilast = ivp->v_size >> fs->lfs_bshift; 2456 noff = nlast - olast; 2457 2458 /* 2459 * Make sure no one can use the Ifile while we change it around. 2460 * Even after taking the iflock we need to make sure no one still 2461 * is holding Ifile buffers, so we get each one, to drain them. 2462 * (XXX this could be done better.) 2463 */ 2464 simple_lock(&fs->lfs_interlock); 2465 lockmgr(&fs->lfs_iflock, LK_EXCLUSIVE, &fs->lfs_interlock); 2466 simple_unlock(&fs->lfs_interlock); 2467 vn_lock(ivp, LK_EXCLUSIVE | LK_RETRY); 2468 for (i = 0; i < ilast; i++) { 2469 bread(ivp, i, fs->lfs_bsize, NOCRED, &bp); 2470 brelse(bp); 2471 } 2472 2473 /* Allocate new Ifile blocks */ 2474 for (i = ilast; i < ilast + noff; i++) { 2475 if (lfs_balloc(ivp, i * fs->lfs_bsize, fs->lfs_bsize, NOCRED, 0, 2476 &bp) != 0) 2477 panic("balloc extending ifile"); 2478 memset(bp->b_data, 0, fs->lfs_bsize); 2479 VOP_BWRITE(bp); 2480 } 2481 2482 /* Register new ifile size */ 2483 ip->i_size += noff * fs->lfs_bsize; 2484 ip->i_ffs1_size = ip->i_size; 2485 uvm_vnp_setsize(ivp, ip->i_size); 2486 2487 /* Copy the inode table to its new position */ 2488 if (noff != 0) { 2489 if (noff < 0) { 2490 start = nlast; 2491 end = ilast + noff; 2492 inc = 1; 2493 } else { 2494 start = ilast + noff - 1; 2495 end = nlast - 1; 2496 inc = -1; 2497 } 2498 for (i = start; i != end; i += inc) { 2499 if (bread(ivp, i, fs->lfs_bsize, NOCRED, &bp) != 0) 2500 panic("resize: bread dst blk failed"); 2501 if (bread(ivp, i - noff, fs->lfs_bsize, NOCRED, &obp)) 2502 panic("resize: bread src blk failed"); 2503 memcpy(bp->b_data, obp->b_data, fs->lfs_bsize); 2504 VOP_BWRITE(bp); 2505 brelse(obp); 2506 } 2507 } 2508 2509 /* If we are expanding, write the new empty SEGUSE entries */ 2510 if (newnsegs > oldnsegs) { 2511 for (i = oldnsegs; i < newnsegs; i++) { 2512 if ((error = bread(ivp, i / fs->lfs_sepb + 2513 fs->lfs_cleansz, 2514 fs->lfs_bsize, NOCRED, &bp)) != 0) 2515 panic("lfs: ifile read: %d", error); 2516 while ((i + 1) % fs->lfs_sepb && i < newnsegs) { 2517 sup = &((SEGUSE *)bp->b_data)[i % fs->lfs_sepb]; 2518 memset(sup, 0, sizeof(*sup)); 2519 i++; 2520 } 2521 VOP_BWRITE(bp); 2522 } 2523 } 2524 2525 /* Zero out unused superblock offsets */ 2526 for (i = 2; i < LFS_MAXNUMSB; i++) 2527 if (dtosn(fs, fs->lfs_sboffs[i]) >= newnsegs) 2528 fs->lfs_sboffs[i] = 0x0; 2529 2530 /* 2531 * Correct superblock entries that depend on fs size. 2532 * The computations of these are as follows: 2533 * 2534 * size = segtod(fs, nseg) 2535 * dsize = segtod(fs, nseg - minfreeseg) - btofsb(#super * LFS_SBPAD) 2536 * bfree = dsize - btofsb(fs, bsize * nseg / 2) - blocks_actually_used 2537 * avail = segtod(fs, nclean) - btofsb(#clean_super * LFS_SBPAD) 2538 * + (segtod(fs, 1) - (offset - curseg)) 2539 * - segtod(fs, minfreeseg - (minfreeseg / 2)) 2540 * 2541 * XXX - we should probably adjust minfreeseg as well. 2542 */ 2543 gain = (newnsegs - oldnsegs); 2544 fs->lfs_nseg = newnsegs; 2545 fs->lfs_segtabsz = nlast - fs->lfs_cleansz; 2546 fs->lfs_size += gain * btofsb(fs, fs->lfs_ssize); 2547 fs->lfs_dsize += gain * btofsb(fs, fs->lfs_ssize) - btofsb(fs, sbbytes); 2548 fs->lfs_bfree += gain * btofsb(fs, fs->lfs_ssize) - btofsb(fs, sbbytes) 2549 - gain * btofsb(fs, fs->lfs_bsize / 2); 2550 if (gain > 0) { 2551 fs->lfs_nclean += gain; 2552 fs->lfs_avail += gain * btofsb(fs, fs->lfs_ssize); 2553 } else { 2554 fs->lfs_nclean -= cgain; 2555 fs->lfs_avail -= cgain * btofsb(fs, fs->lfs_ssize) - 2556 btofsb(fs, csbbytes); 2557 } 2558 2559 /* Resize segment flag cache */ 2560 fs->lfs_suflags[0] = (u_int32_t *)realloc(fs->lfs_suflags[0], 2561 fs->lfs_nseg * sizeof(u_int32_t), 2562 M_SEGMENT, M_WAITOK); 2563 fs->lfs_suflags[1] = (u_int32_t *)realloc(fs->lfs_suflags[0], 2564 fs->lfs_nseg * sizeof(u_int32_t), 2565 M_SEGMENT, M_WAITOK); 2566 for (i = oldnsegs; i < newnsegs; i++) 2567 fs->lfs_suflags[0][i] = fs->lfs_suflags[1][i] = 0x0; 2568 2569 /* Truncate Ifile if necessary */ 2570 if (noff < 0) 2571 lfs_truncate(ivp, ivp->v_size + (noff << fs->lfs_bshift), 0, 2572 NOCRED, curlwp); 2573 2574 /* Update cleaner info so the cleaner can die */ 2575 bread(ivp, 0, fs->lfs_bsize, NOCRED, &bp); 2576 ((CLEANERINFO *)bp->b_data)->clean = fs->lfs_nclean; 2577 ((CLEANERINFO *)bp->b_data)->dirty = fs->lfs_nseg - fs->lfs_nclean; 2578 VOP_BWRITE(bp); 2579 2580 /* Let Ifile accesses proceed */ 2581 VOP_UNLOCK(ivp, 0); 2582 simple_lock(&fs->lfs_interlock); 2583 lockmgr(&fs->lfs_iflock, LK_RELEASE, &fs->lfs_interlock); 2584 simple_unlock(&fs->lfs_interlock); 2585 2586 out: 2587 lfs_segunlock(fs); 2588 return error; 2589 } 2590