1 /* $NetBSD: lfs_vfsops.c,v 1.154 2004/07/05 07:28:46 pk 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 1.154 2004/07/05 07:28:46 pk 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 <uvm/uvm_extern.h> 95 #include <sys/sysctl.h> 96 #include <sys/conf.h> 97 98 #include <miscfs/specfs/specdev.h> 99 100 #include <ufs/ufs/quota.h> 101 #include <ufs/ufs/inode.h> 102 #include <ufs/ufs/ufsmount.h> 103 #include <ufs/ufs/ufs_extern.h> 104 105 #include <uvm/uvm.h> 106 #include <uvm/uvm_stat.h> 107 #include <uvm/uvm_pager.h> 108 #include <uvm/uvm_pdaemon.h> 109 110 #include <ufs/lfs/lfs.h> 111 #include <ufs/lfs/lfs_extern.h> 112 113 #include <miscfs/genfs/genfs.h> 114 #include <miscfs/genfs/genfs_node.h> 115 116 static int lfs_gop_write(struct vnode *, struct vm_page **, int, int); 117 static boolean_t lfs_issequential_hole(const struct ufsmount *, 118 daddr_t, daddr_t); 119 120 static int lfs_mountfs(struct vnode *, struct mount *, struct proc *); 121 static daddr_t check_segsum(struct lfs *, daddr_t, u_int64_t, 122 struct ucred *, int, int *, struct proc *); 123 124 extern const struct vnodeopv_desc lfs_vnodeop_opv_desc; 125 extern const struct vnodeopv_desc lfs_specop_opv_desc; 126 extern const struct vnodeopv_desc lfs_fifoop_opv_desc; 127 128 pid_t lfs_writer_daemon = 0; 129 int lfs_do_flush = 0; 130 131 const struct vnodeopv_desc * const lfs_vnodeopv_descs[] = { 132 &lfs_vnodeop_opv_desc, 133 &lfs_specop_opv_desc, 134 &lfs_fifoop_opv_desc, 135 NULL, 136 }; 137 138 struct vfsops lfs_vfsops = { 139 MOUNT_LFS, 140 lfs_mount, 141 ufs_start, 142 lfs_unmount, 143 ufs_root, 144 ufs_quotactl, 145 lfs_statvfs, 146 lfs_sync, 147 lfs_vget, 148 lfs_fhtovp, 149 lfs_vptofh, 150 lfs_init, 151 lfs_reinit, 152 lfs_done, 153 NULL, 154 lfs_mountroot, 155 ufs_check_export, 156 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 157 lfs_vnodeopv_descs, 158 }; 159 160 struct genfs_ops lfs_genfsops = { 161 lfs_gop_size, 162 ufs_gop_alloc, 163 lfs_gop_write, 164 }; 165 166 /* 167 * XXX Same structure as FFS inodes? Should we share a common pool? 168 */ 169 POOL_INIT(lfs_inode_pool, sizeof(struct inode), 0, 0, 0, "lfsinopl", 170 &pool_allocator_nointr); 171 POOL_INIT(lfs_dinode_pool, sizeof(struct ufs1_dinode), 0, 0, 0, "lfsdinopl", 172 &pool_allocator_nointr); 173 POOL_INIT(lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, "lfsinoextpl", 174 &pool_allocator_nointr); 175 176 /* 177 * The writer daemon. UVM keeps track of how many dirty pages we are holding 178 * in lfs_subsys_pages; the daemon flushes the filesystem when this value 179 * crosses the (user-defined) threshhold LFS_MAX_PAGES. 180 */ 181 static void 182 lfs_writerd(void *arg) 183 { 184 #ifdef LFS_PD 185 struct mount *mp, *nmp; 186 struct lfs *fs; 187 #endif 188 189 lfs_writer_daemon = curproc->p_pid; 190 191 simple_lock(&lfs_subsys_lock); 192 for (;;) { 193 ltsleep(&lfs_writer_daemon, PVM | PNORELOCK, "lfswriter", 0, 194 &lfs_subsys_lock); 195 196 #ifdef LFS_PD 197 /* 198 * Look through the list of LFSs to see if any of them 199 * have requested pageouts. 200 */ 201 simple_lock(&mountlist_slock); 202 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 203 mp = nmp) { 204 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 205 nmp = CIRCLEQ_NEXT(mp, mnt_list); 206 continue; 207 } 208 if (strncmp(&mp->mnt_stat.f_fstypename[0], MOUNT_LFS, 209 MFSNAMELEN) == 0) { 210 fs = VFSTOUFS(mp)->um_lfs; 211 if (fs->lfs_pdflush || 212 !TAILQ_EMPTY(&fs->lfs_pchainhd)) { 213 fs->lfs_pdflush = 0; 214 lfs_flush_fs(fs, 0); 215 } 216 } 217 218 simple_lock(&mountlist_slock); 219 nmp = CIRCLEQ_NEXT(mp, mnt_list); 220 vfs_unbusy(mp); 221 } 222 simple_unlock(&mountlist_slock); 223 #endif /* LFS_PD */ 224 225 /* 226 * If global state wants a flush, flush everything. 227 */ 228 simple_lock(&lfs_subsys_lock); 229 while (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || 230 locked_queue_bytes > LFS_MAX_BYTES || 231 lfs_subsys_pages > LFS_MAX_PAGES) { 232 233 #ifdef DEBUG_LFS_FLUSH 234 if (lfs_do_flush) 235 printf("daemon: lfs_do_flush\n"); 236 if (locked_queue_count > LFS_MAX_BUFS) 237 printf("daemon: lqc = %d, max %d\n", 238 locked_queue_count, LFS_MAX_BUFS); 239 if (locked_queue_bytes > LFS_MAX_BYTES) 240 printf("daemon: lqb = %ld, max %ld\n", 241 locked_queue_bytes, LFS_MAX_BYTES); 242 if (lfs_subsys_pages > LFS_MAX_PAGES) 243 printf("daemon: lssp = %d, max %d\n", 244 lfs_subsys_pages, LFS_MAX_PAGES); 245 #endif /* DEBUG_LFS_FLUSH */ 246 lfs_flush(NULL, SEGM_WRITERD); 247 lfs_do_flush = 0; 248 } 249 } 250 /* NOTREACHED */ 251 } 252 253 /* 254 * Initialize the filesystem, most work done by ufs_init. 255 */ 256 void 257 lfs_init() 258 { 259 #ifdef _LKM 260 malloc_type_attach(M_SEGMENT); 261 pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, 262 "lfsinopl", &pool_allocator_nointr); 263 pool_init(&lfs_dinode_pool, sizeof(struct ufs1_dinode), 0, 0, 0, 264 "lfsdinopl", &pool_allocator_nointr); 265 pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, 266 "lfsinoextpl", &pool_allocator_nointr); 267 #endif 268 ufs_init(); 269 270 #ifdef DEBUG 271 memset(lfs_log, 0, sizeof(lfs_log)); 272 #endif 273 simple_lock_init(&lfs_subsys_lock); 274 } 275 276 void 277 lfs_reinit() 278 { 279 ufs_reinit(); 280 } 281 282 void 283 lfs_done() 284 { 285 ufs_done(); 286 #ifdef _LKM 287 pool_destroy(&lfs_inode_pool); 288 pool_destroy(&lfs_dinode_pool); 289 pool_destroy(&lfs_inoext_pool); 290 malloc_type_detach(M_SEGMENT); 291 #endif 292 } 293 294 /* 295 * Called by main() when ufs is going to be mounted as root. 296 */ 297 int 298 lfs_mountroot() 299 { 300 extern struct vnode *rootvp; 301 struct mount *mp; 302 struct proc *p = curproc; /* XXX */ 303 int error; 304 305 if (root_device->dv_class != DV_DISK) 306 return (ENODEV); 307 308 if (rootdev == NODEV) 309 return (ENODEV); 310 /* 311 * Get vnodes for swapdev and rootdev. 312 */ 313 if ((error = bdevvp(rootdev, &rootvp))) { 314 printf("lfs_mountroot: can't setup bdevvp's"); 315 return (error); 316 } 317 if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device", &mp))) { 318 vrele(rootvp); 319 return (error); 320 } 321 if ((error = lfs_mountfs(rootvp, mp, p))) { 322 mp->mnt_op->vfs_refcount--; 323 vfs_unbusy(mp); 324 free(mp, M_MOUNT); 325 vrele(rootvp); 326 return (error); 327 } 328 simple_lock(&mountlist_slock); 329 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 330 simple_unlock(&mountlist_slock); 331 (void)lfs_statvfs(mp, &mp->mnt_stat, p); 332 vfs_unbusy(mp); 333 setrootfstime((time_t)(VFSTOUFS(mp)->um_lfs->lfs_tstamp)); 334 return (0); 335 } 336 337 /* 338 * VFS Operations. 339 * 340 * mount system call 341 */ 342 int 343 lfs_mount(struct mount *mp, const char *path, void *data, struct nameidata *ndp, struct proc *p) 344 { 345 struct vnode *devvp; 346 struct ufs_args args; 347 struct ufsmount *ump = NULL; 348 struct lfs *fs = NULL; /* LFS */ 349 int error; 350 mode_t accessmode; 351 352 if (mp->mnt_flag & MNT_GETARGS) { 353 ump = VFSTOUFS(mp); 354 if (ump == NULL) 355 return EIO; 356 args.fspec = NULL; 357 vfs_showexport(mp, &args.export, &ump->um_export); 358 return copyout(&args, data, sizeof(args)); 359 } 360 error = copyin(data, &args, sizeof (struct ufs_args)); 361 if (error) 362 return (error); 363 364 /* 365 * If updating, check whether changing from read-only to 366 * read/write; if there is no device name, that's all we do. 367 */ 368 if (mp->mnt_flag & MNT_UPDATE) { 369 ump = VFSTOUFS(mp); 370 fs = ump->um_lfs; 371 if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 372 /* 373 * If upgrade to read-write by non-root, then verify 374 * that user has necessary permissions on the device. 375 */ 376 if (p->p_ucred->cr_uid != 0) { 377 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 378 error = VOP_ACCESS(ump->um_devvp, VREAD|VWRITE, 379 p->p_ucred, p); 380 VOP_UNLOCK(ump->um_devvp, 0); 381 if (error) 382 return (error); 383 } 384 fs->lfs_ronly = 0; 385 } 386 if (args.fspec == 0) { 387 /* 388 * Process export requests. 389 */ 390 return (vfs_export(mp, &ump->um_export, &args.export)); 391 } 392 } 393 /* 394 * Not an update, or updating the name: look up the name 395 * and verify that it refers to a sensible block device. 396 */ 397 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 398 if ((error = namei(ndp)) != 0) 399 return (error); 400 devvp = ndp->ni_vp; 401 if (devvp->v_type != VBLK) { 402 vrele(devvp); 403 return (ENOTBLK); 404 } 405 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 406 vrele(devvp); 407 return (ENXIO); 408 } 409 /* 410 * If mount by non-root, then verify that user has necessary 411 * permissions on the device. 412 */ 413 if (p->p_ucred->cr_uid != 0) { 414 accessmode = VREAD; 415 if ((mp->mnt_flag & MNT_RDONLY) == 0) 416 accessmode |= VWRITE; 417 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 418 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 419 if (error) { 420 vput(devvp); 421 return (error); 422 } 423 VOP_UNLOCK(devvp, 0); 424 } 425 if ((mp->mnt_flag & MNT_UPDATE) == 0) 426 error = lfs_mountfs(devvp, mp, p); /* LFS */ 427 else { 428 if (devvp != ump->um_devvp) 429 error = EINVAL; /* needs translation */ 430 else 431 vrele(devvp); 432 } 433 if (error) { 434 vrele(devvp); 435 return (error); 436 } 437 ump = VFSTOUFS(mp); 438 fs = ump->um_lfs; /* LFS */ 439 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, 440 UIO_USERSPACE, mp, p); 441 } 442 443 /* 444 * Roll-forward code. 445 */ 446 447 /* 448 * Load the appropriate indirect block, and change the appropriate pointer. 449 * Mark the block dirty. Do segment and avail accounting. 450 */ 451 static int 452 update_meta(struct lfs *fs, ino_t ino, int version, daddr_t lbn, 453 daddr_t ndaddr, size_t size, struct proc *p) 454 { 455 int error; 456 struct vnode *vp; 457 struct inode *ip; 458 #ifdef DEBUG_LFS_RFW 459 daddr_t odaddr; 460 struct indir a[NIADDR]; 461 int num; 462 int i; 463 #endif /* DEBUG_LFS_RFW */ 464 struct buf *bp; 465 SEGUSE *sup; 466 467 KASSERT(lbn >= 0); /* no indirect blocks */ 468 469 if ((error = lfs_rf_valloc(fs, ino, version, p, &vp)) != 0) { 470 #ifdef DEBUG_LFS_RFW 471 printf("update_meta: ino %d: lfs_rf_valloc returned %d\n", ino, 472 error); 473 #endif /* DEBUG_LFS_RFW */ 474 return error; 475 } 476 477 if ((error = VOP_BALLOC(vp, (lbn << fs->lfs_bshift), size, 478 NOCRED, 0, &bp)) != 0) { 479 vput(vp); 480 return (error); 481 } 482 /* No need to write, the block is already on disk */ 483 if (bp->b_flags & B_DELWRI) { 484 LFS_UNLOCK_BUF(bp); 485 fs->lfs_avail += btofsb(fs, bp->b_bcount); 486 } 487 bp->b_flags |= B_INVAL; 488 brelse(bp); 489 490 /* 491 * Extend the file, if it is not large enough already. 492 * XXX this is not exactly right, we don't know how much of the 493 * XXX last block is actually used. We hope that an inode will 494 * XXX appear later to give the correct size. 495 */ 496 ip = VTOI(vp); 497 if (ip->i_size <= (lbn << fs->lfs_bshift)) { 498 u_int64_t newsize; 499 500 if (lbn < NDADDR) 501 newsize = ip->i_ffs1_size = (lbn << fs->lfs_bshift) + 502 (size - fs->lfs_fsize) + 1; 503 else 504 newsize = ip->i_ffs1_size = (lbn << fs->lfs_bshift) + 1; 505 506 if (ip->i_size < newsize) { 507 ip->i_size = newsize; 508 /* 509 * tell vm our new size for the case the inode won't 510 * appear later. 511 */ 512 uvm_vnp_setsize(vp, newsize); 513 } 514 } 515 516 lfs_update_single(fs, NULL, vp, lbn, ndaddr, size); 517 518 LFS_SEGENTRY(sup, fs, dtosn(fs, ndaddr), bp); 519 sup->su_nbytes += size; 520 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, ndaddr), bp); 521 522 /* differences here should be due to UNWRITTEN indirect blocks. */ 523 KASSERT((lblkno(fs, ip->i_size) > NDADDR && 524 ip->i_lfs_effnblks == ip->i_ffs1_blocks) || 525 ip->i_lfs_effnblks >= ip->i_ffs1_blocks); 526 527 #ifdef DEBUG_LFS_RFW 528 /* Now look again to make sure it worked */ 529 ufs_bmaparray(vp, lbn, &odaddr, &a[0], &num, NULL, NULL); 530 for (i = num; i > 0; i--) { 531 if (!a[i].in_exists) 532 panic("update_meta: absent %d lv indirect block", i); 533 } 534 if (dbtofsb(fs, odaddr) != ndaddr) 535 printf("update_meta: failed setting ino %d lbn %" PRId64 536 " to %" PRId64 "\n", ino, lbn, ndaddr); 537 #endif /* DEBUG_LFS_RFW */ 538 vput(vp); 539 return 0; 540 } 541 542 static int 543 update_inoblk(struct lfs *fs, daddr_t offset, struct ucred *cred, 544 struct proc *p) 545 { 546 struct vnode *devvp, *vp; 547 struct inode *ip; 548 struct ufs1_dinode *dip; 549 struct buf *dbp, *ibp; 550 int error; 551 daddr_t daddr; 552 IFILE *ifp; 553 SEGUSE *sup; 554 555 devvp = VTOI(fs->lfs_ivnode)->i_devvp; 556 557 /* 558 * Get the inode, update times and perms. 559 * DO NOT update disk blocks, we do that separately. 560 */ 561 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_ibsize, cred, &dbp); 562 if (error) { 563 #ifdef DEBUG_LFS_RFW 564 printf("update_inoblk: bread returned %d\n", error); 565 #endif 566 return error; 567 } 568 dip = ((struct ufs1_dinode *)(dbp->b_data)) + INOPB(fs); 569 while (--dip >= (struct ufs1_dinode *)dbp->b_data) { 570 if (dip->di_inumber > LFS_IFILE_INUM) { 571 /* printf("ino %d version %d\n", dip->di_inumber, 572 dip->di_gen); */ 573 error = lfs_rf_valloc(fs, dip->di_inumber, dip->di_gen, 574 p, &vp); 575 if (error) { 576 #ifdef DEBUG_LFS_RFW 577 printf("update_inoblk: lfs_rf_valloc returned %d\n", error); 578 #endif 579 continue; 580 } 581 ip = VTOI(vp); 582 if (dip->di_size != ip->i_size) 583 VOP_TRUNCATE(vp, dip->di_size, 0, NOCRED, p); 584 /* Get mode, link count, size, and times */ 585 memcpy(ip->i_din.ffs1_din, dip, 586 offsetof(struct ufs1_dinode, di_db[0])); 587 588 /* Then the rest, except di_blocks */ 589 ip->i_flags = ip->i_ffs1_flags = dip->di_flags; 590 ip->i_gen = ip->i_ffs1_gen = dip->di_gen; 591 ip->i_uid = ip->i_ffs1_uid = dip->di_uid; 592 ip->i_gid = ip->i_ffs1_gid = dip->di_gid; 593 594 ip->i_mode = ip->i_ffs1_mode; 595 ip->i_nlink = ip->i_ffs_effnlink = ip->i_ffs1_nlink; 596 ip->i_size = ip->i_ffs1_size; 597 598 LFS_SET_UINO(ip, IN_CHANGE | IN_MODIFIED | IN_UPDATE); 599 600 /* Re-initialize to get type right */ 601 ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, 602 &vp); 603 vput(vp); 604 605 /* Record change in location */ 606 LFS_IENTRY(ifp, fs, dip->di_inumber, ibp); 607 daddr = ifp->if_daddr; 608 ifp->if_daddr = dbtofsb(fs, dbp->b_blkno); 609 error = LFS_BWRITE_LOG(ibp); /* Ifile */ 610 /* And do segment accounting */ 611 if (dtosn(fs, daddr) != dtosn(fs, dbtofsb(fs, dbp->b_blkno))) { 612 if (daddr > 0) { 613 LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), 614 ibp); 615 sup->su_nbytes -= sizeof (struct ufs1_dinode); 616 LFS_WRITESEGENTRY(sup, fs, 617 dtosn(fs, daddr), 618 ibp); 619 } 620 LFS_SEGENTRY(sup, fs, dtosn(fs, dbtofsb(fs, dbp->b_blkno)), 621 ibp); 622 sup->su_nbytes += sizeof (struct ufs1_dinode); 623 LFS_WRITESEGENTRY(sup, fs, 624 dtosn(fs, dbtofsb(fs, dbp->b_blkno)), 625 ibp); 626 } 627 } 628 } 629 dbp->b_flags |= B_AGE; 630 brelse(dbp); 631 632 return 0; 633 } 634 635 #define CHECK_CKSUM 0x0001 /* Check the checksum to make sure it's valid */ 636 #define CHECK_UPDATE 0x0002 /* Update Ifile for new data blocks / inodes */ 637 638 static daddr_t 639 check_segsum(struct lfs *fs, daddr_t offset, u_int64_t nextserial, 640 struct ucred *cred, int flags, int *pseg_flags, struct proc *p) 641 { 642 struct vnode *devvp; 643 struct buf *bp, *dbp; 644 int error, nblocks = 0, ninos, i, j; /* XXX: gcc */ 645 SEGSUM *ssp; 646 u_long *dp = NULL, *datap = NULL; /* XXX u_int32_t */ 647 daddr_t oldoffset; 648 int32_t *iaddr; /* XXX ondisk32 */ 649 FINFO *fip; 650 SEGUSE *sup; 651 size_t size; 652 653 devvp = VTOI(fs->lfs_ivnode)->i_devvp; 654 /* 655 * If the segment has a superblock and we're at the top 656 * of the segment, skip the superblock. 657 */ 658 if (sntod(fs, dtosn(fs, offset)) == offset) { 659 LFS_SEGENTRY(sup, fs, dtosn(fs, offset), bp); 660 if (sup->su_flags & SEGUSE_SUPERBLOCK) 661 offset += btofsb(fs, LFS_SBPAD); 662 brelse(bp); 663 } 664 665 /* Read in the segment summary */ 666 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_sumsize, cred, &bp); 667 if (error) 668 return -1; 669 670 /* Check summary checksum */ 671 ssp = (SEGSUM *)bp->b_data; 672 if (flags & CHECK_CKSUM) { 673 if (ssp->ss_sumsum != cksum(&ssp->ss_datasum, 674 fs->lfs_sumsize - 675 sizeof(ssp->ss_sumsum))) { 676 #ifdef DEBUG_LFS_RFW 677 printf("Sumsum error at 0x%" PRIx64 "\n", offset); 678 #endif 679 offset = -1; 680 goto err1; 681 } 682 if (ssp->ss_nfinfo == 0 && ssp->ss_ninos == 0) { 683 #ifdef DEBUG_LFS_RFW 684 printf("Empty pseg at 0x%" PRIx64 "\n", offset); 685 #endif 686 offset = -1; 687 goto err1; 688 } 689 if (ssp->ss_create < fs->lfs_tstamp) { 690 #ifdef DEBUG_LFS_RFW 691 printf("Old data at 0x%" PRIx64 "\n", offset); 692 #endif 693 offset = -1; 694 goto err1; 695 } 696 } 697 if (fs->lfs_version > 1) { 698 if (ssp->ss_serial != nextserial) { 699 #ifdef DEBUG_LFS_RFW 700 printf("Unexpected serial number at 0x%" PRIx64 701 "\n", offset); 702 #endif 703 offset = -1; 704 goto err1; 705 } 706 if (ssp->ss_ident != fs->lfs_ident) { 707 #ifdef DEBUG_LFS_RFW 708 printf("Incorrect fsid (0x%x vs 0x%x) at 0x%" 709 PRIx64 "\n", ssp->ss_ident, fs->lfs_ident, offset); 710 #endif 711 offset = -1; 712 goto err1; 713 } 714 } 715 if (pseg_flags) 716 *pseg_flags = ssp->ss_flags; 717 oldoffset = offset; 718 offset += btofsb(fs, fs->lfs_sumsize); 719 720 ninos = howmany(ssp->ss_ninos, INOPB(fs)); 721 /* XXX ondisk32 */ 722 iaddr = (int32_t *)(bp->b_data + fs->lfs_sumsize - sizeof(int32_t)); 723 if (flags & CHECK_CKSUM) { 724 /* Count blocks */ 725 nblocks = 0; 726 fip = (FINFO *)(bp->b_data + SEGSUM_SIZE(fs)); 727 for (i = 0; i < ssp->ss_nfinfo; ++i) { 728 nblocks += fip->fi_nblocks; 729 if (fip->fi_nblocks <= 0) 730 break; 731 /* XXX ondisk32 */ 732 fip = (FINFO *)(((char *)fip) + FINFOSIZE + 733 (fip->fi_nblocks * sizeof(int32_t))); 734 } 735 nblocks += ninos; 736 /* Create the sum array */ 737 datap = dp = (u_long *)malloc(nblocks * sizeof(u_long), 738 M_SEGMENT, M_WAITOK); 739 } 740 741 /* Handle individual blocks */ 742 fip = (FINFO *)(bp->b_data + SEGSUM_SIZE(fs)); 743 for (i = 0; i < ssp->ss_nfinfo || ninos; ++i) { 744 /* Inode block? */ 745 if (ninos && *iaddr == offset) { 746 if (flags & CHECK_CKSUM) { 747 /* Read in the head and add to the buffer */ 748 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_bsize, 749 cred, &dbp); 750 if (error) { 751 offset = -1; 752 goto err2; 753 } 754 (*dp++) = ((u_long *)(dbp->b_data))[0]; 755 dbp->b_flags |= B_AGE; 756 brelse(dbp); 757 } 758 if (flags & CHECK_UPDATE) { 759 if ((error = update_inoblk(fs, offset, cred, p)) 760 != 0) { 761 offset = -1; 762 goto err2; 763 } 764 } 765 offset += btofsb(fs, fs->lfs_ibsize); 766 --iaddr; 767 --ninos; 768 --i; /* compensate */ 769 continue; 770 } 771 /* printf("check: blocks from ino %d version %d\n", 772 fip->fi_ino, fip->fi_version); */ 773 size = fs->lfs_bsize; 774 for (j = 0; j < fip->fi_nblocks; ++j) { 775 if (j == fip->fi_nblocks - 1) 776 size = fip->fi_lastlength; 777 if (flags & CHECK_CKSUM) { 778 error = bread(devvp, fsbtodb(fs, offset), size, cred, &dbp); 779 if (error) { 780 offset = -1; 781 goto err2; 782 } 783 (*dp++) = ((u_long *)(dbp->b_data))[0]; 784 dbp->b_flags |= B_AGE; 785 brelse(dbp); 786 } 787 /* Account for and update any direct blocks */ 788 if ((flags & CHECK_UPDATE) && 789 fip->fi_ino > LFS_IFILE_INUM && 790 fip->fi_blocks[j] >= 0) { 791 update_meta(fs, fip->fi_ino, fip->fi_version, 792 fip->fi_blocks[j], offset, size, p); 793 } 794 offset += btofsb(fs, size); 795 } 796 /* XXX ondisk32 */ 797 fip = (FINFO *)(((char *)fip) + FINFOSIZE 798 + fip->fi_nblocks * sizeof(int32_t)); 799 } 800 /* Checksum the array, compare */ 801 if ((flags & CHECK_CKSUM) && 802 ssp->ss_datasum != cksum(datap, nblocks * sizeof(u_long))) 803 { 804 #ifdef DEBUG_LFS_RFW 805 printf("Datasum error at 0x%" PRIx64 " (wanted %x got %x)\n", 806 offset, ssp->ss_datasum, cksum(datap, nblocks * 807 sizeof(u_long))); 808 #endif 809 offset = -1; 810 goto err2; 811 } 812 813 /* If we're at the end of the segment, move to the next */ 814 if (dtosn(fs, offset + btofsb(fs, fs->lfs_sumsize + fs->lfs_bsize)) != 815 dtosn(fs, offset)) { 816 if (dtosn(fs, offset) == dtosn(fs, ssp->ss_next)) { 817 offset = -1; 818 goto err2; 819 } 820 offset = ssp->ss_next; 821 #ifdef DEBUG_LFS_RFW 822 printf("LFS roll forward: moving on to offset 0x%" PRIx64 823 " -> segment %d\n", offset, dtosn(fs,offset)); 824 #endif 825 } 826 827 if (flags & CHECK_UPDATE) { 828 fs->lfs_avail -= (offset - oldoffset); 829 /* Don't clog the buffer queue */ 830 simple_lock(&lfs_subsys_lock); 831 if (locked_queue_count > LFS_MAX_BUFS || 832 locked_queue_bytes > LFS_MAX_BYTES) { 833 lfs_flush(fs, SEGM_CKP); 834 } 835 simple_unlock(&lfs_subsys_lock); 836 } 837 838 err2: 839 if (flags & CHECK_CKSUM) 840 free(datap, M_SEGMENT); 841 err1: 842 bp->b_flags |= B_AGE; 843 brelse(bp); 844 845 /* XXX should we update the serial number even for bad psegs? */ 846 if ((flags & CHECK_UPDATE) && offset > 0 && fs->lfs_version > 1) 847 fs->lfs_serial = nextserial; 848 return offset; 849 } 850 851 /* 852 * Common code for mount and mountroot 853 * LFS specific 854 */ 855 int 856 lfs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p) 857 { 858 extern struct vnode *rootvp; 859 struct dlfs *tdfs, *dfs, *adfs; 860 struct lfs *fs; 861 struct ufsmount *ump; 862 struct vnode *vp; 863 struct buf *bp, *abp; 864 struct partinfo dpart; 865 dev_t dev; 866 int error, i, ronly, secsize, fsbsize; 867 struct ucred *cred; 868 CLEANERINFO *cip; 869 SEGUSE *sup; 870 int flags, dirty, do_rollforward; 871 daddr_t offset, oldoffset, lastgoodpseg, sb_addr; 872 int sn, curseg; 873 874 cred = p ? p->p_ucred : NOCRED; 875 /* 876 * Disallow multiple mounts of the same device. 877 * Disallow mounting of a device that is currently in use 878 * (except for root, which might share swap device for miniroot). 879 * Flush out any old buffers remaining from a previous use. 880 */ 881 if ((error = vfs_mountedon(devvp)) != 0) 882 return (error); 883 if (vcount(devvp) > 1 && devvp != rootvp) 884 return (EBUSY); 885 if ((error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0)) != 0) 886 return (error); 887 888 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 889 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 890 if (error) 891 return (error); 892 if (VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, p) != 0) 893 secsize = DEV_BSIZE; 894 else 895 secsize = dpart.disklab->d_secsize; 896 897 /* Don't free random space on error. */ 898 bp = NULL; 899 abp = NULL; 900 ump = NULL; 901 902 sb_addr = LFS_LABELPAD / secsize; 903 while (1) { 904 /* Read in the superblock. */ 905 error = bread(devvp, sb_addr, LFS_SBPAD, cred, &bp); 906 if (error) 907 goto out; 908 dfs = (struct dlfs *)bp->b_data; 909 910 /* Check the basics. */ 911 if (dfs->dlfs_magic != LFS_MAGIC || dfs->dlfs_bsize >= MAXBSIZE || 912 dfs->dlfs_version > LFS_VERSION || 913 dfs->dlfs_bsize < sizeof(struct dlfs)) { 914 #ifdef DEBUG_LFS 915 printf("lfs_mountfs: primary superblock sanity failed\n"); 916 #endif 917 error = EINVAL; /* XXX needs translation */ 918 goto out; 919 } 920 if (dfs->dlfs_inodefmt > LFS_MAXINODEFMT) 921 printf("lfs_mountfs: warning: unknown inode format %d\n", 922 dfs->dlfs_inodefmt); 923 924 if (dfs->dlfs_version == 1) 925 fsbsize = secsize; 926 else { 927 fsbsize = 1 << (dfs->dlfs_bshift - dfs->dlfs_blktodb + 928 dfs->dlfs_fsbtodb); 929 /* 930 * Could be, if the frag size is large enough, that we 931 * don't have the "real" primary superblock. If that's 932 * the case, get the real one, and try again. 933 */ 934 if (sb_addr != dfs->dlfs_sboffs[0] << 935 dfs->dlfs_fsbtodb) { 936 /* #ifdef DEBUG_LFS */ 937 printf("lfs_mountfs: sb daddr 0x%llx is not right, trying 0x%llx\n", 938 (long long)sb_addr, (long long)(dfs->dlfs_sboffs[0] << 939 dfs->dlfs_fsbtodb)); 940 /* #endif */ 941 sb_addr = dfs->dlfs_sboffs[0] << 942 dfs->dlfs_fsbtodb; 943 brelse(bp); 944 continue; 945 } 946 } 947 break; 948 } 949 950 /* 951 * Check the second superblock to see which is newer; then mount 952 * using the older of the two. This is necessary to ensure that 953 * the filesystem is valid if it was not unmounted cleanly. 954 */ 955 956 if (dfs->dlfs_sboffs[1] && 957 dfs->dlfs_sboffs[1] - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) 958 { 959 error = bread(devvp, dfs->dlfs_sboffs[1] * (fsbsize / secsize), 960 LFS_SBPAD, cred, &abp); 961 if (error) 962 goto out; 963 adfs = (struct dlfs *)abp->b_data; 964 965 if (dfs->dlfs_version == 1) { 966 /* 1s resolution comparison */ 967 if (adfs->dlfs_tstamp < dfs->dlfs_tstamp) 968 tdfs = adfs; 969 else 970 tdfs = dfs; 971 } else { 972 /* monotonic infinite-resolution comparison */ 973 if (adfs->dlfs_serial < dfs->dlfs_serial) 974 tdfs = adfs; 975 else 976 tdfs = dfs; 977 } 978 979 /* Check the basics. */ 980 if (tdfs->dlfs_magic != LFS_MAGIC || 981 tdfs->dlfs_bsize > MAXBSIZE || 982 tdfs->dlfs_version > LFS_VERSION || 983 tdfs->dlfs_bsize < sizeof(struct dlfs)) { 984 #ifdef DEBUG_LFS 985 printf("lfs_mountfs: alt superblock sanity failed\n"); 986 #endif 987 error = EINVAL; /* XXX needs translation */ 988 goto out; 989 } 990 } else { 991 #ifdef DEBUG_LFS 992 printf("lfs_mountfs: invalid alt superblock daddr=0x%x\n", 993 dfs->dlfs_sboffs[1]); 994 #endif 995 error = EINVAL; 996 goto out; 997 } 998 999 /* Allocate the mount structure, copy the superblock into it. */ 1000 fs = malloc(sizeof(struct lfs), M_UFSMNT, M_WAITOK | M_ZERO); 1001 memcpy(&fs->lfs_dlfs, tdfs, sizeof(struct dlfs)); 1002 1003 /* Compatibility */ 1004 if (fs->lfs_version < 2) { 1005 fs->lfs_sumsize = LFS_V1_SUMMARY_SIZE; 1006 fs->lfs_ibsize = fs->lfs_bsize; 1007 fs->lfs_start = fs->lfs_sboffs[0]; 1008 fs->lfs_tstamp = fs->lfs_otstamp; 1009 fs->lfs_fsbtodb = 0; 1010 } 1011 1012 /* Before rolling forward, lock so vget will sleep for other procs */ 1013 fs->lfs_flags = LFS_NOTYET; 1014 fs->lfs_rfpid = p->p_pid; 1015 1016 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 1017 ump->um_lfs = fs; 1018 ump->um_fstype = UFS1; 1019 if (sizeof(struct lfs) < LFS_SBPAD) { /* XXX why? */ 1020 bp->b_flags |= B_INVAL; 1021 abp->b_flags |= B_INVAL; 1022 } 1023 brelse(bp); 1024 bp = NULL; 1025 brelse(abp); 1026 abp = NULL; 1027 1028 /* Set up the I/O information */ 1029 fs->lfs_devbsize = secsize; 1030 fs->lfs_iocount = 0; 1031 fs->lfs_diropwait = 0; 1032 fs->lfs_activesb = 0; 1033 fs->lfs_uinodes = 0; 1034 fs->lfs_ravail = 0; 1035 fs->lfs_sbactive = 0; 1036 1037 /* Set up the ifile and lock aflags */ 1038 fs->lfs_doifile = 0; 1039 fs->lfs_writer = 0; 1040 fs->lfs_dirops = 0; 1041 fs->lfs_nadirop = 0; 1042 fs->lfs_seglock = 0; 1043 fs->lfs_pdflush = 0; 1044 fs->lfs_sleepers = 0; 1045 simple_lock_init(&fs->lfs_interlock); 1046 lockinit(&fs->lfs_fraglock, PINOD, "lfs_fraglock", 0, 0); 1047 1048 /* Set the file system readonly/modify bits. */ 1049 fs->lfs_ronly = ronly; 1050 if (ronly == 0) 1051 fs->lfs_fmod = 1; 1052 1053 /* Initialize the mount structure. */ 1054 dev = devvp->v_rdev; 1055 mp->mnt_data = ump; 1056 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1057 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); 1058 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1059 mp->mnt_stat.f_namemax = MAXNAMLEN; 1060 mp->mnt_stat.f_iosize = fs->lfs_bsize; 1061 mp->mnt_maxsymlinklen = fs->lfs_maxsymlinklen; 1062 mp->mnt_flag |= MNT_LOCAL; 1063 mp->mnt_fs_bshift = fs->lfs_bshift; 1064 ump->um_flags = 0; 1065 ump->um_mountp = mp; 1066 ump->um_dev = dev; 1067 ump->um_devvp = devvp; 1068 ump->um_bptrtodb = fs->lfs_fsbtodb; 1069 ump->um_seqinc = fragstofsb(fs, fs->lfs_frag); 1070 ump->um_nindir = fs->lfs_nindir; 1071 ump->um_lognindir = ffs(fs->lfs_nindir) - 1; 1072 for (i = 0; i < MAXQUOTAS; i++) 1073 ump->um_quotas[i] = NULLVP; 1074 devvp->v_specmountpoint = mp; 1075 1076 /* Set up reserved memory for pageout */ 1077 lfs_setup_resblks(fs); 1078 /* Set up vdirop tailq */ 1079 TAILQ_INIT(&fs->lfs_dchainhd); 1080 /* and paging tailq */ 1081 TAILQ_INIT(&fs->lfs_pchainhd); 1082 1083 /* 1084 * We use the ifile vnode for almost every operation. Instead of 1085 * retrieving it from the hash table each time we retrieve it here, 1086 * artificially increment the reference count and keep a pointer 1087 * to it in the incore copy of the superblock. 1088 */ 1089 if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { 1090 #ifdef DEBUG 1091 printf("lfs_mountfs: ifile vget failed, error=%d\n", error); 1092 #endif 1093 goto out; 1094 } 1095 fs->lfs_ivnode = vp; 1096 VREF(vp); 1097 1098 /* Set up segment usage flags for the autocleaner. */ 1099 fs->lfs_nactive = 0; 1100 fs->lfs_suflags = (u_int32_t **)malloc(2 * sizeof(u_int32_t *), 1101 M_SEGMENT, M_WAITOK); 1102 fs->lfs_suflags[0] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1103 M_SEGMENT, M_WAITOK); 1104 fs->lfs_suflags[1] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1105 M_SEGMENT, M_WAITOK); 1106 memset(fs->lfs_suflags[1], 0, fs->lfs_nseg * sizeof(u_int32_t)); 1107 for (i = 0; i < fs->lfs_nseg; i++) { 1108 int changed; 1109 1110 LFS_SEGENTRY(sup, fs, i, bp); 1111 changed = 0; 1112 if (!ronly) { 1113 if (sup->su_nbytes == 0 && 1114 !(sup->su_flags & SEGUSE_EMPTY)) { 1115 sup->su_flags |= SEGUSE_EMPTY; 1116 ++changed; 1117 } else if (!(sup->su_nbytes == 0) && 1118 (sup->su_flags & SEGUSE_EMPTY)) { 1119 sup->su_flags &= ~SEGUSE_EMPTY; 1120 ++changed; 1121 } 1122 if (sup->su_flags & SEGUSE_ACTIVE) { 1123 sup->su_flags &= ~SEGUSE_ACTIVE; 1124 ++changed; 1125 } 1126 } 1127 fs->lfs_suflags[0][i] = sup->su_flags; 1128 if (changed) 1129 LFS_WRITESEGENTRY(sup, fs, i, bp); 1130 else 1131 brelse(bp); 1132 } 1133 1134 /* 1135 * Roll forward. 1136 * 1137 * We don't automatically roll forward for v1 filesystems, because 1138 * of the danger that the clock was turned back between the last 1139 * checkpoint and crash. This would roll forward garbage. 1140 * 1141 * v2 filesystems don't have this problem because they use a 1142 * monotonically increasing serial number instead of a timestamp. 1143 */ 1144 #ifdef LFS_DO_ROLLFORWARD 1145 do_rollforward = !fs->lfs_ronly; 1146 #else 1147 do_rollforward = (fs->lfs_version > 1 && !fs->lfs_ronly && 1148 !(fs->lfs_pflags & LFS_PF_CLEAN)); 1149 #endif 1150 if (do_rollforward) { 1151 u_int64_t nextserial; 1152 /* 1153 * Phase I: Find the address of the last good partial 1154 * segment that was written after the checkpoint. Mark 1155 * the segments in question dirty, so they won't be 1156 * reallocated. 1157 */ 1158 lastgoodpseg = oldoffset = offset = fs->lfs_offset; 1159 flags = 0x0; 1160 #ifdef DEBUG_LFS_RFW 1161 printf("LFS roll forward phase 1: starting at offset 0x%" 1162 PRIx64 "\n", offset); 1163 #endif 1164 LFS_SEGENTRY(sup, fs, dtosn(fs, offset), bp); 1165 if (!(sup->su_flags & SEGUSE_DIRTY)) 1166 --fs->lfs_nclean; 1167 sup->su_flags |= SEGUSE_DIRTY; 1168 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, offset), bp); 1169 nextserial = fs->lfs_serial + 1; 1170 while ((offset = check_segsum(fs, offset, nextserial, 1171 cred, CHECK_CKSUM, &flags, p)) > 0) { 1172 nextserial++; 1173 if (sntod(fs, oldoffset) != sntod(fs, offset)) { 1174 LFS_SEGENTRY(sup, fs, dtosn(fs, oldoffset), 1175 bp); 1176 if (!(sup->su_flags & SEGUSE_DIRTY)) 1177 --fs->lfs_nclean; 1178 sup->su_flags |= SEGUSE_DIRTY; 1179 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, oldoffset), 1180 bp); 1181 } 1182 1183 #ifdef DEBUG_LFS_RFW 1184 printf("LFS roll forward phase 1: offset=0x%" 1185 PRIx64 "\n", offset); 1186 if (flags & SS_DIROP) { 1187 printf("lfs_mountfs: dirops at 0x%" PRIx64 "\n", 1188 oldoffset); 1189 if (!(flags & SS_CONT)) 1190 printf("lfs_mountfs: dirops end " 1191 "at 0x%" PRIx64 "\n", oldoffset); 1192 } 1193 #endif 1194 if (!(flags & SS_CONT)) 1195 lastgoodpseg = offset; 1196 oldoffset = offset; 1197 } 1198 #ifdef DEBUG_LFS_RFW 1199 if (flags & SS_CONT) { 1200 printf("LFS roll forward: warning: incomplete " 1201 "dirops discarded\n"); 1202 } 1203 printf("LFS roll forward phase 1: completed: " 1204 "lastgoodpseg=0x%" PRIx64 "\n", lastgoodpseg); 1205 #endif 1206 oldoffset = fs->lfs_offset; 1207 if (fs->lfs_offset != lastgoodpseg) { 1208 /* Don't overwrite what we're trying to preserve */ 1209 offset = fs->lfs_offset; 1210 fs->lfs_offset = lastgoodpseg; 1211 fs->lfs_curseg = sntod(fs, dtosn(fs, fs->lfs_offset)); 1212 for (sn = curseg = dtosn(fs, fs->lfs_curseg);;) { 1213 sn = (sn + 1) % fs->lfs_nseg; 1214 if (sn == curseg) 1215 panic("lfs_mountfs: no clean segments"); 1216 LFS_SEGENTRY(sup, fs, sn, bp); 1217 dirty = (sup->su_flags & SEGUSE_DIRTY); 1218 brelse(bp); 1219 if (!dirty) 1220 break; 1221 } 1222 fs->lfs_nextseg = sntod(fs, sn); 1223 1224 /* 1225 * Phase II: Roll forward from the first superblock. 1226 */ 1227 while (offset != lastgoodpseg) { 1228 #ifdef DEBUG_LFS_RFW 1229 printf("LFS roll forward phase 2: 0x%" 1230 PRIx64 "\n", offset); 1231 #endif 1232 offset = check_segsum(fs, offset, 1233 fs->lfs_serial + 1, cred, CHECK_UPDATE, 1234 NULL, p); 1235 } 1236 1237 /* 1238 * Finish: flush our changes to disk. 1239 */ 1240 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1241 printf("lfs_mountfs: roll forward recovered %lld blocks\n", 1242 (long long)(lastgoodpseg - oldoffset)); 1243 } 1244 #ifdef DEBUG_LFS_RFW 1245 printf("LFS roll forward complete\n"); 1246 #endif 1247 } 1248 /* If writing, sb is not clean; record in case of immediate crash */ 1249 if (!fs->lfs_ronly) { 1250 fs->lfs_pflags &= ~LFS_PF_CLEAN; 1251 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1252 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1253 } 1254 1255 /* Allow vget now that roll-forward is complete */ 1256 fs->lfs_flags &= ~(LFS_NOTYET); 1257 wakeup(&fs->lfs_flags); 1258 1259 /* 1260 * Initialize the ifile cleaner info with information from 1261 * the superblock. 1262 */ 1263 LFS_CLEANERINFO(cip, fs, bp); 1264 cip->clean = fs->lfs_nclean; 1265 cip->dirty = fs->lfs_nseg - fs->lfs_nclean; 1266 cip->avail = fs->lfs_avail; 1267 cip->bfree = fs->lfs_bfree; 1268 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 1269 1270 /* 1271 * Mark the current segment as ACTIVE, since we're going to 1272 * be writing to it. 1273 */ 1274 LFS_SEGENTRY(sup, fs, dtosn(fs, fs->lfs_offset), bp); 1275 sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; 1276 fs->lfs_nactive++; 1277 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, fs->lfs_offset), bp); /* Ifile */ 1278 1279 /* Now that roll-forward is done, unlock the Ifile */ 1280 vput(vp); 1281 1282 /* Comment on ifile size if it is too large */ 1283 if (fs->lfs_ivnode->v_size / fs->lfs_bsize > LFS_MAX_BUFS) { 1284 fs->lfs_flags |= LFS_WARNED; 1285 printf("lfs_mountfs: please consider increasing NBUF to at least %lld\n", 1286 (long long)(fs->lfs_ivnode->v_size / fs->lfs_bsize) * (nbuf / LFS_MAX_BUFS)); 1287 } 1288 if (fs->lfs_ivnode->v_size > LFS_MAX_BYTES) { 1289 fs->lfs_flags |= LFS_WARNED; 1290 printf("lfs_mountfs: please consider increasing BUFPAGES to at least %lld\n", 1291 (long long)(fs->lfs_ivnode->v_size * bufpages / LFS_MAX_BYTES)); 1292 } 1293 1294 return (0); 1295 out: 1296 if (bp) 1297 brelse(bp); 1298 if (abp) 1299 brelse(abp); 1300 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1301 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p); 1302 VOP_UNLOCK(devvp, 0); 1303 if (ump) { 1304 free(ump->um_lfs, M_UFSMNT); 1305 free(ump, M_UFSMNT); 1306 mp->mnt_data = NULL; 1307 } 1308 1309 /* Start the pagedaemon-anticipating daemon */ 1310 if (lfs_writer_daemon == 0 && 1311 kthread_create1(lfs_writerd, NULL, NULL, "lfs_writer") != 0) 1312 panic("fork lfs_writer"); 1313 1314 return (error); 1315 } 1316 1317 /* 1318 * unmount system call 1319 */ 1320 int 1321 lfs_unmount(struct mount *mp, int mntflags, struct proc *p) 1322 { 1323 struct ufsmount *ump; 1324 struct lfs *fs; 1325 int error, flags, ronly; 1326 int s; 1327 1328 flags = 0; 1329 if (mntflags & MNT_FORCE) 1330 flags |= FORCECLOSE; 1331 1332 ump = VFSTOUFS(mp); 1333 fs = ump->um_lfs; 1334 1335 /* wake up the cleaner so it can die */ 1336 wakeup(&fs->lfs_nextseg); 1337 wakeup(&lfs_allclean_wakeup); 1338 simple_lock(&fs->lfs_interlock); 1339 while (fs->lfs_sleepers) 1340 ltsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers", 0, 1341 &fs->lfs_interlock); 1342 simple_unlock(&fs->lfs_interlock); 1343 1344 #ifdef QUOTA 1345 if (mp->mnt_flag & MNT_QUOTA) { 1346 int i; 1347 error = vflush(mp, fs->lfs_ivnode, SKIPSYSTEM|flags); 1348 if (error) 1349 return (error); 1350 for (i = 0; i < MAXQUOTAS; i++) { 1351 if (ump->um_quotas[i] == NULLVP) 1352 continue; 1353 quotaoff(p, mp, i); 1354 } 1355 /* 1356 * Here we fall through to vflush again to ensure 1357 * that we have gotten rid of all the system vnodes. 1358 */ 1359 } 1360 #endif 1361 if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) 1362 return (error); 1363 if ((error = VFS_SYNC(mp, 1, p->p_ucred, p)) != 0) 1364 return (error); 1365 s = splbio(); 1366 if (LIST_FIRST(&fs->lfs_ivnode->v_dirtyblkhd)) 1367 panic("lfs_unmount: still dirty blocks on ifile vnode"); 1368 splx(s); 1369 1370 /* Comment on ifile size if it has become too large */ 1371 if (!(fs->lfs_flags & LFS_WARNED)) { 1372 if (fs->lfs_ivnode->v_size / fs->lfs_bsize > LFS_MAX_BUFS) 1373 printf("lfs_unmount: please consider increasing" 1374 " NBUF to at least %lld\n", 1375 (long long)(fs->lfs_ivnode->v_size / 1376 fs->lfs_bsize) * 1377 (long long)(nbuf / LFS_MAX_BUFS)); 1378 if (fs->lfs_ivnode->v_size > LFS_MAX_BYTES) 1379 printf("lfs_unmount: please consider increasing" 1380 " BUFPAGES to at least %lld\n", 1381 (long long)(fs->lfs_ivnode->v_size * 1382 bufpages / LFS_MAX_BYTES)); 1383 } 1384 1385 /* Explicitly write the superblock, to update serial and pflags */ 1386 fs->lfs_pflags |= LFS_PF_CLEAN; 1387 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1388 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1389 while (fs->lfs_iocount) 1390 tsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount", 0); 1391 1392 /* Finish with the Ifile, now that we're done with it */ 1393 vrele(fs->lfs_ivnode); 1394 vgone(fs->lfs_ivnode); 1395 1396 ronly = !fs->lfs_ronly; 1397 if (ump->um_devvp->v_type != VBAD) 1398 ump->um_devvp->v_specmountpoint = NULL; 1399 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1400 error = VOP_CLOSE(ump->um_devvp, 1401 ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 1402 vput(ump->um_devvp); 1403 1404 /* Free per-mount data structures */ 1405 free(fs->lfs_suflags[0], M_SEGMENT); 1406 free(fs->lfs_suflags[1], M_SEGMENT); 1407 free(fs->lfs_suflags, M_SEGMENT); 1408 lfs_free_resblks(fs); 1409 free(fs, M_UFSMNT); 1410 free(ump, M_UFSMNT); 1411 1412 mp->mnt_data = NULL; 1413 mp->mnt_flag &= ~MNT_LOCAL; 1414 return (error); 1415 } 1416 1417 /* 1418 * Get file system statistics. 1419 */ 1420 int 1421 lfs_statvfs(struct mount *mp, struct statvfs *sbp, struct proc *p) 1422 { 1423 struct lfs *fs; 1424 struct ufsmount *ump; 1425 1426 ump = VFSTOUFS(mp); 1427 fs = ump->um_lfs; 1428 if (fs->lfs_magic != LFS_MAGIC) 1429 panic("lfs_statvfs: magic"); 1430 1431 sbp->f_bsize = fs->lfs_bsize; 1432 sbp->f_frsize = fs->lfs_fsize; 1433 sbp->f_iosize = fs->lfs_bsize; 1434 sbp->f_blocks = fsbtofrags(fs, LFS_EST_NONMETA(fs)); 1435 sbp->f_bfree = fsbtofrags(fs, LFS_EST_BFREE(fs)); 1436 sbp->f_bresvd = fsbtofrags(fs, LFS_EST_RSVD(fs)); 1437 if (sbp->f_bfree > sbp->f_bresvd) 1438 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1439 else 1440 sbp->f_bavail = 0; 1441 1442 sbp->f_files = fs->lfs_bfree / btofsb(fs, fs->lfs_ibsize) * INOPB(fs); 1443 sbp->f_ffree = sbp->f_files - fs->lfs_nfiles; 1444 sbp->f_favail = sbp->f_ffree; 1445 sbp->f_fresvd = 0; 1446 copy_statvfs_info(sbp, mp); 1447 return (0); 1448 } 1449 1450 /* 1451 * Go through the disk queues to initiate sandbagged IO; 1452 * go through the inodes to write those that have been modified; 1453 * initiate the writing of the super block if it has been modified. 1454 * 1455 * Note: we are always called with the filesystem marked `MPBUSY'. 1456 */ 1457 int 1458 lfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct proc *p) 1459 { 1460 int error; 1461 struct lfs *fs; 1462 1463 fs = VFSTOUFS(mp)->um_lfs; 1464 if (fs->lfs_ronly) 1465 return 0; 1466 lfs_writer_enter(fs, "lfs_dirops"); 1467 1468 /* All syncs must be checkpoints until roll-forward is implemented. */ 1469 error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); 1470 lfs_writer_leave(fs); 1471 #ifdef QUOTA 1472 qsync(mp); 1473 #endif 1474 return (error); 1475 } 1476 1477 extern struct lock ufs_hashlock; 1478 1479 /* 1480 * Look up an LFS dinode number to find its incore vnode. If not already 1481 * in core, read it in from the specified device. Return the inode locked. 1482 * Detection and handling of mount points must be done by the calling routine. 1483 */ 1484 int 1485 lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1486 { 1487 struct lfs *fs; 1488 struct ufs1_dinode *dip; 1489 struct inode *ip; 1490 struct buf *bp; 1491 struct ifile *ifp; 1492 struct vnode *vp; 1493 struct ufsmount *ump; 1494 daddr_t daddr; 1495 dev_t dev; 1496 int error, retries; 1497 struct timespec ts; 1498 1499 ump = VFSTOUFS(mp); 1500 dev = ump->um_dev; 1501 fs = ump->um_lfs; 1502 1503 /* 1504 * If the filesystem is not completely mounted yet, suspend 1505 * any access requests (wait for roll-forward to complete). 1506 */ 1507 while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) 1508 tsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet", 0); 1509 1510 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1511 return (0); 1512 1513 if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, &vp)) != 0) { 1514 *vpp = NULL; 1515 return (error); 1516 } 1517 1518 do { 1519 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 1520 ungetnewvnode(vp); 1521 return (0); 1522 } 1523 } while (lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0)); 1524 1525 /* Translate the inode number to a disk address. */ 1526 if (ino == LFS_IFILE_INUM) 1527 daddr = fs->lfs_idaddr; 1528 else { 1529 /* XXX bounds-check this too */ 1530 LFS_IENTRY(ifp, fs, ino, bp); 1531 daddr = ifp->if_daddr; 1532 if (fs->lfs_version > 1) { 1533 ts.tv_sec = ifp->if_atime_sec; 1534 ts.tv_nsec = ifp->if_atime_nsec; 1535 } 1536 1537 brelse(bp); 1538 if (daddr == LFS_UNUSED_DADDR) { 1539 *vpp = NULLVP; 1540 ungetnewvnode(vp); 1541 lockmgr(&ufs_hashlock, LK_RELEASE, 0); 1542 return (ENOENT); 1543 } 1544 } 1545 1546 /* Allocate/init new vnode/inode. */ 1547 lfs_vcreate(mp, ino, vp); 1548 1549 /* 1550 * Put it onto its hash chain and lock it so that other requests for 1551 * this inode will block if they arrive while we are sleeping waiting 1552 * for old data structures to be purged or for the contents of the 1553 * disk portion of this inode to be read. 1554 */ 1555 ip = VTOI(vp); 1556 ufs_ihashins(ip); 1557 lockmgr(&ufs_hashlock, LK_RELEASE, 0); 1558 1559 /* 1560 * XXX 1561 * This may not need to be here, logically it should go down with 1562 * the i_devvp initialization. 1563 * Ask Kirk. 1564 */ 1565 ip->i_lfs = ump->um_lfs; 1566 1567 /* Read in the disk contents for the inode, copy into the inode. */ 1568 retries = 0; 1569 again: 1570 error = bread(ump->um_devvp, fsbtodb(fs, daddr), 1571 (fs->lfs_version == 1 ? fs->lfs_bsize : fs->lfs_ibsize), 1572 NOCRED, &bp); 1573 if (error) { 1574 /* 1575 * The inode does not contain anything useful, so it would 1576 * be misleading to leave it on its hash chain. With mode 1577 * still zero, it will be unlinked and returned to the free 1578 * list by vput(). 1579 */ 1580 vput(vp); 1581 brelse(bp); 1582 *vpp = NULL; 1583 return (error); 1584 } 1585 1586 dip = lfs_ifind(fs, ino, bp); 1587 if (dip == NULL) { 1588 /* Assume write has not completed yet; try again */ 1589 bp->b_flags |= B_INVAL; 1590 brelse(bp); 1591 ++retries; 1592 if (retries > LFS_IFIND_RETRIES) { 1593 #ifdef DEBUG 1594 /* If the seglock is held look at the bpp to see 1595 what is there anyway */ 1596 if (fs->lfs_seglock > 0) { 1597 struct buf **bpp; 1598 struct ufs1_dinode *dp; 1599 int i; 1600 1601 for (bpp = fs->lfs_sp->bpp; 1602 bpp != fs->lfs_sp->cbpp; ++bpp) { 1603 if ((*bpp)->b_vp == fs->lfs_ivnode && 1604 bpp != fs->lfs_sp->bpp) { 1605 /* Inode block */ 1606 printf("block 0x%" PRIx64 ": ", 1607 (*bpp)->b_blkno); 1608 dp = (struct ufs1_dinode *)(*bpp)->b_data; 1609 for (i = 0; i < INOPB(fs); i++) 1610 if (dp[i].di_u.inumber) 1611 printf("%d ", dp[i].di_u.inumber); 1612 printf("\n"); 1613 } 1614 } 1615 } 1616 #endif 1617 panic("lfs_vget: dinode not found"); 1618 } 1619 printf("lfs_vget: dinode %d not found, retrying...\n", ino); 1620 (void)tsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs ifind", 1); 1621 goto again; 1622 } 1623 *ip->i_din.ffs1_din = *dip; 1624 brelse(bp); 1625 1626 if (fs->lfs_version > 1) { 1627 ip->i_ffs1_atime = ts.tv_sec; 1628 ip->i_ffs1_atimensec = ts.tv_nsec; 1629 } 1630 1631 lfs_vinit(mp, &vp); 1632 1633 *vpp = vp; 1634 1635 KASSERT(VOP_ISLOCKED(vp)); 1636 1637 return (0); 1638 } 1639 1640 /* 1641 * File handle to vnode 1642 */ 1643 int 1644 lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1645 { 1646 struct lfid *lfhp; 1647 struct buf *bp; 1648 IFILE *ifp; 1649 int32_t daddr; 1650 struct lfs *fs; 1651 1652 lfhp = (struct lfid *)fhp; 1653 if (lfhp->lfid_ino < LFS_IFILE_INUM) 1654 return ESTALE; 1655 1656 fs = VFSTOUFS(mp)->um_lfs; 1657 if (lfhp->lfid_ident != fs->lfs_ident) 1658 return ESTALE; 1659 1660 if (lfhp->lfid_ino > 1661 ((VTOI(fs->lfs_ivnode)->i_ffs1_size >> fs->lfs_bshift) - 1662 fs->lfs_cleansz - fs->lfs_segtabsz) * fs->lfs_ifpb) 1663 return ESTALE; 1664 1665 if (ufs_ihashlookup(VFSTOUFS(mp)->um_dev, lfhp->lfid_ino) == NULLVP) { 1666 LFS_IENTRY(ifp, fs, lfhp->lfid_ino, bp); 1667 daddr = ifp->if_daddr; 1668 brelse(bp); 1669 if (daddr == LFS_UNUSED_DADDR) 1670 return ESTALE; 1671 } 1672 1673 return (ufs_fhtovp(mp, &lfhp->lfid_ufid, vpp)); 1674 } 1675 1676 /* 1677 * Vnode pointer to File handle 1678 */ 1679 /* ARGSUSED */ 1680 int 1681 lfs_vptofh(struct vnode *vp, struct fid *fhp) 1682 { 1683 struct inode *ip; 1684 struct lfid *lfhp; 1685 1686 ip = VTOI(vp); 1687 lfhp = (struct lfid *)fhp; 1688 lfhp->lfid_len = sizeof(struct lfid); 1689 lfhp->lfid_ino = ip->i_number; 1690 lfhp->lfid_gen = ip->i_gen; 1691 lfhp->lfid_ident = ip->i_lfs->lfs_ident; 1692 return (0); 1693 } 1694 1695 static int 1696 sysctl_lfs_dostats(SYSCTLFN_ARGS) 1697 { 1698 extern struct lfs_stats lfs_stats; 1699 extern int lfs_dostats; 1700 int error; 1701 1702 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 1703 if (error || newp == NULL) 1704 return (error); 1705 1706 if (lfs_dostats == 0) 1707 memset(&lfs_stats,0,sizeof(lfs_stats)); 1708 1709 return (0); 1710 } 1711 1712 SYSCTL_SETUP(sysctl_vfs_lfs_setup, "sysctl vfs.lfs subtree setup") 1713 { 1714 extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead; 1715 1716 sysctl_createv(clog, 0, NULL, NULL, 1717 CTLFLAG_PERMANENT, 1718 CTLTYPE_NODE, "vfs", NULL, 1719 NULL, 0, NULL, 0, 1720 CTL_VFS, CTL_EOL); 1721 sysctl_createv(clog, 0, NULL, NULL, 1722 CTLFLAG_PERMANENT, 1723 CTLTYPE_NODE, "lfs", 1724 SYSCTL_DESCR("Log-structured file system"), 1725 NULL, 0, NULL, 0, 1726 CTL_VFS, 5, CTL_EOL); 1727 /* 1728 * XXX the "5" above could be dynamic, thereby eliminating one 1729 * more instance of the "number to vfs" mapping problem, but 1730 * "2" is the order as taken from sys/mount.h 1731 */ 1732 1733 sysctl_createv(clog, 0, NULL, NULL, 1734 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1735 CTLTYPE_INT, "flushindir", NULL, 1736 NULL, 0, &lfs_writeindir, 0, 1737 CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); 1738 sysctl_createv(clog, 0, NULL, NULL, 1739 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1740 CTLTYPE_INT, "clean_vnhead", NULL, 1741 NULL, 0, &lfs_clean_vnhead, 0, 1742 CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); 1743 sysctl_createv(clog, 0, NULL, NULL, 1744 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1745 CTLTYPE_INT, "dostats", 1746 SYSCTL_DESCR("Maintain statistics on LFS operations"), 1747 sysctl_lfs_dostats, 0, &lfs_dostats, 0, 1748 CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); 1749 } 1750 1751 /* 1752 * ufs_bmaparray callback function for writing. 1753 * 1754 * Since blocks will be written to the new segment anyway, 1755 * we don't care about current daddr of them. 1756 */ 1757 static boolean_t 1758 lfs_issequential_hole(const struct ufsmount *ump, 1759 daddr_t daddr0, daddr_t daddr1) 1760 { 1761 1762 KASSERT(daddr0 == UNWRITTEN || 1763 (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR)); 1764 KASSERT(daddr1 == UNWRITTEN || 1765 (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR)); 1766 1767 /* NOTE: all we want to know here is 'hole or not'. */ 1768 /* NOTE: UNASSIGNED is converted to 0 by ufs_bmaparray. */ 1769 1770 /* 1771 * treat UNWRITTENs and all resident blocks as 'contiguous' 1772 */ 1773 if (daddr0 != 0 && daddr1 != 0) 1774 return TRUE; 1775 1776 /* 1777 * both are in hole? 1778 */ 1779 if (daddr0 == 0 && daddr1 == 0) 1780 return TRUE; /* all holes are 'contiguous' for us. */ 1781 1782 return FALSE; 1783 } 1784 1785 /* 1786 * lfs_gop_write functions exactly like genfs_gop_write, except that 1787 * (1) it requires the seglock to be held by its caller, and sp->fip 1788 * to be properly initialized (it will return without re-initializing 1789 * sp->fip, and without calling lfs_writeseg). 1790 * (2) it uses the remaining space in the segment, rather than VOP_BMAP, 1791 * to determine how large a block it can write at once (though it does 1792 * still use VOP_BMAP to find holes in the file); 1793 * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks 1794 * (leaving lfs_writeseg to deal with the cluster blocks, so we might 1795 * now have clusters of clusters, ick.) 1796 */ 1797 static int 1798 lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, int flags) 1799 { 1800 int i, s, error, run; 1801 int fs_bshift; 1802 vaddr_t kva; 1803 off_t eof, offset, startoffset; 1804 size_t bytes, iobytes, skipbytes; 1805 daddr_t lbn, blkno; 1806 struct vm_page *pg; 1807 struct buf *mbp, *bp; 1808 struct vnode *devvp = VTOI(vp)->i_devvp; 1809 struct inode *ip = VTOI(vp); 1810 struct lfs *fs = ip->i_lfs; 1811 struct segment *sp = fs->lfs_sp; 1812 UVMHIST_FUNC("lfs_gop_write"); UVMHIST_CALLED(ubchist); 1813 1814 /* The Ifile lives in the buffer cache */ 1815 KASSERT(vp != fs->lfs_ivnode); 1816 1817 /* 1818 * Sometimes things slip past the filters in lfs_putpages, 1819 * and the pagedaemon tries to write pages---problem is 1820 * that the pagedaemon never acquires the segment lock. 1821 * 1822 * Unbusy and unclean the pages, and put them on the ACTIVE 1823 * queue under the hypothesis that they couldn't have got here 1824 * unless they were modified *quite* recently. 1825 * 1826 * XXXUBC that last statement is an oversimplification of course. 1827 */ 1828 if (!(fs->lfs_seglock) || fs->lfs_lockpid != curproc->p_pid) { 1829 simple_lock(&vp->v_interlock); 1830 #ifdef DEBUG 1831 printf("lfs_gop_write: seglock not held\n"); 1832 #endif 1833 uvm_lock_pageq(); 1834 for (i = 0; i < npages; i++) { 1835 pg = pgs[i]; 1836 1837 if (pg->flags & PG_PAGEOUT) 1838 uvmexp.paging--; 1839 if (pg->flags & PG_DELWRI) { 1840 uvm_pageunwire(pg); 1841 } 1842 uvm_pageactivate(pg); 1843 pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); 1844 #ifdef DEBUG_LFS 1845 printf("pg[%d]->flags = %x\n", i, pg->flags); 1846 printf("pg[%d]->pqflags = %x\n", i, pg->pqflags); 1847 printf("pg[%d]->uanon = %p\n", i, pg->uanon); 1848 printf("pg[%d]->uobject = %p\n", i, pg->uobject); 1849 printf("pg[%d]->wire_count = %d\n", i, pg->wire_count); 1850 printf("pg[%d]->loan_count = %d\n", i, pg->loan_count); 1851 #endif 1852 } 1853 /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ 1854 uvm_page_unbusy(pgs, npages); 1855 uvm_unlock_pageq(); 1856 simple_unlock(&vp->v_interlock); 1857 return EAGAIN; 1858 } 1859 1860 UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x", 1861 vp, pgs, npages, flags); 1862 1863 GOP_SIZE(vp, vp->v_size, &eof, GOP_SIZE_WRITE); 1864 1865 if (vp->v_type == VREG) 1866 fs_bshift = vp->v_mount->mnt_fs_bshift; 1867 else 1868 fs_bshift = DEV_BSHIFT; 1869 error = 0; 1870 pg = pgs[0]; 1871 startoffset = pg->offset; 1872 bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); 1873 skipbytes = 0; 1874 1875 /* KASSERT(bytes != 0); */ 1876 if (bytes == 0) 1877 printf("ino %d bytes == 0 offset %" PRId64 "\n", 1878 VTOI(vp)->i_number, pgs[0]->offset); 1879 1880 /* Swap PG_DELWRI for PG_PAGEOUT */ 1881 for (i = 0; i < npages; i++) 1882 if (pgs[i]->flags & PG_DELWRI) { 1883 KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); 1884 pgs[i]->flags &= ~PG_DELWRI; 1885 pgs[i]->flags |= PG_PAGEOUT; 1886 uvmexp.paging++; 1887 uvm_lock_pageq(); 1888 uvm_pageunwire(pgs[i]); 1889 uvm_unlock_pageq(); 1890 } 1891 1892 /* 1893 * Check to make sure we're starting on a block boundary. 1894 * We'll check later to make sure we always write entire 1895 * blocks (or fragments). 1896 */ 1897 if (startoffset & fs->lfs_bmask) 1898 printf("%" PRId64 " & %" PRId64 " = %" PRId64 "\n", 1899 startoffset, fs->lfs_bmask, 1900 startoffset & fs->lfs_bmask); 1901 KASSERT((startoffset & fs->lfs_bmask) == 0); 1902 if (bytes & fs->lfs_ffmask) { 1903 printf("lfs_gop_write: asked to write %ld bytes\n", (long)bytes); 1904 panic("lfs_gop_write: non-integer blocks"); 1905 } 1906 1907 kva = uvm_pagermapin(pgs, npages, 1908 UVMPAGER_MAPIN_WRITE | UVMPAGER_MAPIN_WAITOK); 1909 1910 s = splbio(); 1911 simple_lock(&global_v_numoutput_slock); 1912 vp->v_numoutput += 2; /* one for biodone, one for aiodone */ 1913 simple_unlock(&global_v_numoutput_slock); 1914 mbp = pool_get(&bufpool, PR_WAITOK); 1915 splx(s); 1916 1917 memset(mbp, 0, sizeof(*bp)); 1918 BUF_INIT(mbp); 1919 UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x", 1920 vp, mbp, vp->v_numoutput, bytes); 1921 mbp->b_bufsize = npages << PAGE_SHIFT; 1922 mbp->b_data = (void *)kva; 1923 mbp->b_resid = mbp->b_bcount = bytes; 1924 mbp->b_flags = B_BUSY|B_WRITE|B_AGE|B_CALL; 1925 mbp->b_iodone = uvm_aio_biodone; 1926 mbp->b_vp = vp; 1927 1928 bp = NULL; 1929 for (offset = startoffset; 1930 bytes > 0; 1931 offset += iobytes, bytes -= iobytes) { 1932 lbn = offset >> fs_bshift; 1933 error = ufs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, 1934 lfs_issequential_hole); 1935 if (error) { 1936 UVMHIST_LOG(ubchist, "ufs_bmaparray() -> %d", 1937 error,0,0,0); 1938 skipbytes += bytes; 1939 bytes = 0; 1940 break; 1941 } 1942 1943 iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, 1944 bytes); 1945 if (blkno == (daddr_t)-1) { 1946 skipbytes += iobytes; 1947 continue; 1948 } 1949 1950 /* 1951 * Discover how much we can really pack into this buffer. 1952 */ 1953 /* If no room in the current segment, finish it up */ 1954 if (sp->sum_bytes_left < sizeof(int32_t) || 1955 sp->seg_bytes_left < (1 << fs->lfs_bshift)) { 1956 int version; 1957 1958 lfs_updatemeta(sp); 1959 1960 version = sp->fip->fi_version; 1961 (void) lfs_writeseg(fs, sp); 1962 1963 sp->fip->fi_version = version; 1964 sp->fip->fi_ino = ip->i_number; 1965 /* Add the current file to the segment summary. */ 1966 ++((SEGSUM *)(sp->segsum))->ss_nfinfo; 1967 sp->sum_bytes_left -= FINFOSIZE; 1968 } 1969 /* Check both for space in segment and space in segsum */ 1970 iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) 1971 << fs_bshift); 1972 iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) 1973 << fs_bshift); 1974 KASSERT(iobytes > 0); 1975 1976 /* if it's really one i/o, don't make a second buf */ 1977 if (offset == startoffset && iobytes == bytes) { 1978 bp = mbp; 1979 /* printf("bp is mbp\n"); */ 1980 /* correct overcount if there is no second buffer */ 1981 s = splbio(); 1982 simple_lock(&global_v_numoutput_slock); 1983 --vp->v_numoutput; 1984 simple_unlock(&global_v_numoutput_slock); 1985 splx(s); 1986 } else { 1987 /* printf("bp is not mbp\n"); */ 1988 s = splbio(); 1989 bp = pool_get(&bufpool, PR_WAITOK); 1990 UVMHIST_LOG(ubchist, "vp %p bp %p num now %d", 1991 vp, bp, vp->v_numoutput, 0); 1992 splx(s); 1993 memset(bp, 0, sizeof(*bp)); 1994 BUF_INIT(bp); 1995 bp->b_data = (char *)kva + 1996 (vaddr_t)(offset - pg->offset); 1997 bp->b_resid = bp->b_bcount = iobytes; 1998 bp->b_flags = B_BUSY|B_WRITE|B_CALL; 1999 bp->b_iodone = uvm_aio_biodone1; 2000 } 2001 2002 /* XXX This is silly ... is this necessary? */ 2003 bp->b_vp = NULL; 2004 s = splbio(); 2005 bgetvp(vp, bp); 2006 splx(s); 2007 2008 bp->b_lblkno = lblkno(fs, offset); 2009 bp->b_private = mbp; 2010 if (devvp->v_type == VBLK) { 2011 bp->b_dev = devvp->v_rdev; 2012 } 2013 VOP_BWRITE(bp); 2014 while (lfs_gatherblock(sp, bp, NULL)) 2015 continue; 2016 } 2017 2018 if (skipbytes) { 2019 UVMHIST_LOG(ubchist, "skipbytes %d", skipbytes, 0,0,0); 2020 s = splbio(); 2021 if (error) { 2022 mbp->b_flags |= B_ERROR; 2023 mbp->b_error = error; 2024 } 2025 mbp->b_resid -= skipbytes; 2026 if (mbp->b_resid == 0) { 2027 biodone(mbp); 2028 } 2029 splx(s); 2030 } 2031 UVMHIST_LOG(ubchist, "returning 0", 0,0,0,0); 2032 return (0); 2033 } 2034 2035 /* 2036 * finish vnode/inode initialization. 2037 * used by lfs_vget and lfs_fastvget. 2038 */ 2039 void 2040 lfs_vinit(struct mount *mp, struct vnode **vpp) 2041 { 2042 struct vnode *vp = *vpp; 2043 struct inode *ip = VTOI(vp); 2044 struct ufsmount *ump = VFSTOUFS(mp); 2045 int i; 2046 2047 ip->i_mode = ip->i_ffs1_mode; 2048 ip->i_ffs_effnlink = ip->i_nlink = ip->i_ffs1_nlink; 2049 ip->i_lfs_osize = ip->i_size = ip->i_ffs1_size; 2050 ip->i_flags = ip->i_ffs1_flags; 2051 ip->i_gen = ip->i_ffs1_gen; 2052 ip->i_uid = ip->i_ffs1_uid; 2053 ip->i_gid = ip->i_ffs1_gid; 2054 2055 ip->i_lfs_effnblks = ip->i_ffs1_blocks; 2056 2057 /* 2058 * Initialize the vnode from the inode, check for aliases. In all 2059 * cases re-init ip, the underlying vnode/inode may have changed. 2060 */ 2061 ufs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); 2062 2063 memset(ip->i_lfs_fragsize, 0, NDADDR * sizeof(*ip->i_lfs_fragsize)); 2064 if (vp->v_type != VLNK || 2065 VTOI(vp)->i_size >= vp->v_mount->mnt_maxsymlinklen) { 2066 struct lfs *fs = ump->um_lfs; 2067 #ifdef DEBUG 2068 for (i = (ip->i_size + fs->lfs_bsize - 1) >> fs->lfs_bshift; 2069 i < NDADDR; i++) { 2070 if (ip->i_ffs1_db[i] != 0) { 2071 inconsistent: 2072 lfs_dump_dinode(ip->i_din.ffs1_din); 2073 panic("inconsistent inode"); 2074 } 2075 } 2076 for ( ; i < NDADDR + NIADDR; i++) { 2077 if (ip->i_ffs1_ib[i - NDADDR] != 0) { 2078 goto inconsistent; 2079 } 2080 } 2081 #endif /* DEBUG */ 2082 for (i = 0; i < NDADDR; i++) 2083 if (ip->i_ffs1_db[i] != 0) 2084 ip->i_lfs_fragsize[i] = blksize(fs, ip, i); 2085 } 2086 2087 #ifdef DEBUG 2088 if (vp->v_type == VNON) { 2089 printf("lfs_vinit: ino %d is type VNON! (ifmt=%o)\n", 2090 ip->i_number, (ip->i_mode & IFMT) >> 12); 2091 lfs_dump_dinode(ip->i_din.ffs1_din); 2092 #ifdef DDB 2093 Debugger(); 2094 #endif /* DDB */ 2095 } 2096 #endif /* DEBUG */ 2097 2098 /* 2099 * Finish inode initialization now that aliasing has been resolved. 2100 */ 2101 2102 ip->i_devvp = ump->um_devvp; 2103 VREF(ip->i_devvp); 2104 genfs_node_init(vp, &lfs_genfsops); 2105 uvm_vnp_setsize(vp, ip->i_size); 2106 2107 *vpp = vp; 2108 } 2109