1 /* $NetBSD: lfs_vfsops.c,v 1.117 2003/05/18 12:59:06 yamt 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. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)lfs_vfsops.c 8.20 (Berkeley) 6/10/95 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: lfs_vfsops.c,v 1.117 2003/05/18 12:59:06 yamt Exp $"); 75 76 #if defined(_KERNEL_OPT) 77 #include "opt_quota.h" 78 #endif 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/namei.h> 83 #include <sys/proc.h> 84 #include <sys/kernel.h> 85 #include <sys/vnode.h> 86 #include <sys/mount.h> 87 #include <sys/kthread.h> 88 #include <sys/buf.h> 89 #include <sys/device.h> 90 #include <sys/mbuf.h> 91 #include <sys/file.h> 92 #include <sys/disklabel.h> 93 #include <sys/ioctl.h> 94 #include <sys/errno.h> 95 #include <sys/malloc.h> 96 #include <sys/pool.h> 97 #include <sys/socket.h> 98 #include <uvm/uvm_extern.h> 99 #include <sys/sysctl.h> 100 #include <sys/conf.h> 101 102 #include <miscfs/specfs/specdev.h> 103 104 #include <ufs/ufs/quota.h> 105 #include <ufs/ufs/inode.h> 106 #include <ufs/ufs/ufsmount.h> 107 #include <ufs/ufs/ufs_extern.h> 108 109 #include <uvm/uvm.h> 110 #include <uvm/uvm_stat.h> 111 #include <uvm/uvm_pager.h> 112 #include <uvm/uvm_pdaemon.h> 113 114 #include <ufs/lfs/lfs.h> 115 #include <ufs/lfs/lfs_extern.h> 116 117 #include <miscfs/genfs/genfs.h> 118 #include <miscfs/genfs/genfs_node.h> 119 static int lfs_gop_write(struct vnode *, struct vm_page **, int, int); 120 static boolean_t lfs_issequential_hole(const struct ufsmount *, 121 daddr_t, daddr_t); 122 123 static int lfs_mountfs(struct vnode *, struct mount *, struct proc *); 124 125 extern const struct vnodeopv_desc lfs_vnodeop_opv_desc; 126 extern const struct vnodeopv_desc lfs_specop_opv_desc; 127 extern const struct vnodeopv_desc lfs_fifoop_opv_desc; 128 extern int lfs_subsys_pages; 129 extern int locked_queue_count; 130 extern long locked_queue_bytes; 131 extern struct simplelock lfs_subsys_lock; 132 133 pid_t lfs_writer_daemon = 0; 134 int lfs_do_flush = 0; 135 136 const struct vnodeopv_desc * const lfs_vnodeopv_descs[] = { 137 &lfs_vnodeop_opv_desc, 138 &lfs_specop_opv_desc, 139 &lfs_fifoop_opv_desc, 140 NULL, 141 }; 142 143 struct vfsops lfs_vfsops = { 144 MOUNT_LFS, 145 lfs_mount, 146 ufs_start, 147 lfs_unmount, 148 ufs_root, 149 ufs_quotactl, 150 lfs_statfs, 151 lfs_sync, 152 lfs_vget, 153 lfs_fhtovp, 154 lfs_vptofh, 155 lfs_init, 156 lfs_reinit, 157 lfs_done, 158 lfs_sysctl, 159 lfs_mountroot, 160 ufs_check_export, 161 lfs_vnodeopv_descs, 162 }; 163 164 struct genfs_ops lfs_genfsops = { 165 lfs_gop_size, 166 ufs_gop_alloc, 167 lfs_gop_write, 168 }; 169 170 struct pool lfs_inode_pool; 171 struct pool lfs_dinode_pool; 172 struct pool lfs_inoext_pool; 173 174 /* 175 * The writer daemon. UVM keeps track of how many dirty pages we are holding 176 * in lfs_subsys_pages; the daemon flushes the filesystem when this value 177 * crosses the (user-defined) threshhold LFS_MAX_PAGES. 178 */ 179 static void 180 lfs_writerd(void *arg) 181 { 182 #ifdef LFS_PD 183 struct mount *mp, *nmp; 184 struct lfs *fs; 185 #endif 186 187 lfs_writer_daemon = curproc->p_pid; 188 189 for (;;) { 190 tsleep(&lfs_writer_daemon, PVM, "lfswriter", 0); 191 192 #ifdef LFS_PD 193 /* 194 * Look through the list of LFSs to see if any of them 195 * have requested pageouts. 196 */ 197 simple_lock(&mountlist_slock); 198 for (mp = mountlist.cqh_first; mp != (void *)&mountlist; 199 mp = nmp) { 200 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 201 nmp = mp->mnt_list.cqe_next; 202 continue; 203 } 204 if (strncmp(&mp->mnt_stat.f_fstypename[0], MOUNT_LFS, 205 MFSNAMELEN) == 0) { 206 fs = ((struct ufsmount *)mp->mnt_data)->ufsmount_u.lfs; 207 if (fs->lfs_pdflush || 208 !TAILQ_EMPTY(&fs->lfs_pchainhd)) { 209 fs->lfs_pdflush = 0; 210 lfs_flush_fs(fs, 0); 211 } 212 } 213 214 simple_lock(&mountlist_slock); 215 nmp = mp->mnt_list.cqe_next; 216 vfs_unbusy(mp); 217 } 218 simple_unlock(&mountlist_slock); 219 #endif /* LFS_PD */ 220 221 /* 222 * If global state wants a flush, flush everything. 223 */ 224 while (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || 225 locked_queue_bytes > LFS_MAX_BYTES || 226 lfs_subsys_pages > LFS_MAX_PAGES) { 227 228 #ifdef DEBUG_LFS_FLUSH 229 if (lfs_do_flush) 230 printf("daemon: lfs_do_flush\n"); 231 if (locked_queue_count > LFS_MAX_BUFS) 232 printf("daemon: lqc = %d, max %d\n", 233 locked_queue_count, LFS_MAX_BUFS); 234 if (locked_queue_bytes > LFS_MAX_BYTES) 235 printf("daemon: lqb = %ld, max %d\n", 236 locked_queue_bytes, LFS_MAX_BYTES); 237 if (lfs_subsys_pages > LFS_MAX_PAGES) 238 printf("daemon: lssp = %d, max %d\n", 239 lfs_subsys_pages, LFS_MAX_PAGES); 240 #endif /* DEBUG_LFS_FLUSH */ 241 lfs_flush(NULL, SEGM_WRITERD); 242 lfs_do_flush = 0; 243 } 244 wakeup(&lfs_subsys_pages); 245 } 246 /* NOTREACHED */ 247 } 248 249 /* 250 * Initialize the filesystem, most work done by ufs_init. 251 */ 252 void 253 lfs_init() 254 { 255 ufs_init(); 256 257 /* 258 * XXX Same structure as FFS inodes? Should we share a common pool? 259 */ 260 pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, 261 "lfsinopl", &pool_allocator_nointr); 262 pool_init(&lfs_dinode_pool, sizeof(struct ufs1_dinode), 0, 0, 0, 263 "lfsdinopl", &pool_allocator_nointr); 264 pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, 265 "lfsinoextpl", &pool_allocator_nointr); 266 #ifdef DEBUG 267 memset(lfs_log, 0, sizeof(lfs_log)); 268 #endif 269 simple_lock_init(&lfs_subsys_lock); 270 } 271 272 void 273 lfs_reinit() 274 { 275 ufs_reinit(); 276 } 277 278 void 279 lfs_done() 280 { 281 ufs_done(); 282 pool_destroy(&lfs_inode_pool); 283 pool_destroy(&lfs_inoext_pool); 284 } 285 286 /* 287 * Called by main() when ufs is going to be mounted as root. 288 */ 289 int 290 lfs_mountroot() 291 { 292 extern struct vnode *rootvp; 293 struct mount *mp; 294 struct proc *p = curproc; /* XXX */ 295 int error; 296 297 if (root_device->dv_class != DV_DISK) 298 return (ENODEV); 299 300 if (rootdev == NODEV) 301 return (ENODEV); 302 /* 303 * Get vnodes for swapdev and rootdev. 304 */ 305 if ((error = bdevvp(rootdev, &rootvp))) { 306 printf("lfs_mountroot: can't setup bdevvp's"); 307 return (error); 308 } 309 if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device", &mp))) { 310 vrele(rootvp); 311 return (error); 312 } 313 if ((error = lfs_mountfs(rootvp, mp, p))) { 314 mp->mnt_op->vfs_refcount--; 315 vfs_unbusy(mp); 316 free(mp, M_MOUNT); 317 vrele(rootvp); 318 return (error); 319 } 320 simple_lock(&mountlist_slock); 321 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 322 simple_unlock(&mountlist_slock); 323 (void)lfs_statfs(mp, &mp->mnt_stat, p); 324 vfs_unbusy(mp); 325 inittodr(VFSTOUFS(mp)->um_lfs->lfs_tstamp); 326 return (0); 327 } 328 329 /* 330 * VFS Operations. 331 * 332 * mount system call 333 */ 334 int 335 lfs_mount(struct mount *mp, const char *path, void *data, struct nameidata *ndp, struct proc *p) 336 { 337 struct vnode *devvp; 338 struct ufs_args args; 339 struct ufsmount *ump = NULL; 340 struct lfs *fs = NULL; /* LFS */ 341 int error; 342 mode_t accessmode; 343 344 if (mp->mnt_flag & MNT_GETARGS) { 345 ump = VFSTOUFS(mp); 346 if (ump == NULL) 347 return EIO; 348 args.fspec = NULL; 349 vfs_showexport(mp, &args.export, &ump->um_export); 350 return copyout(&args, data, sizeof(args)); 351 } 352 error = copyin(data, &args, sizeof (struct ufs_args)); 353 if (error) 354 return (error); 355 356 /* 357 * If updating, check whether changing from read-only to 358 * read/write; if there is no device name, that's all we do. 359 */ 360 if (mp->mnt_flag & MNT_UPDATE) { 361 ump = VFSTOUFS(mp); 362 fs = ump->um_lfs; 363 if (fs->lfs_ronly && (mp->mnt_flag & MNT_WANTRDWR)) { 364 /* 365 * If upgrade to read-write by non-root, then verify 366 * that user has necessary permissions on the device. 367 */ 368 if (p->p_ucred->cr_uid != 0) { 369 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 370 error = VOP_ACCESS(ump->um_devvp, VREAD|VWRITE, 371 p->p_ucred, p); 372 VOP_UNLOCK(ump->um_devvp, 0); 373 if (error) 374 return (error); 375 } 376 fs->lfs_ronly = 0; 377 } 378 if (args.fspec == 0) { 379 /* 380 * Process export requests. 381 */ 382 return (vfs_export(mp, &ump->um_export, &args.export)); 383 } 384 } 385 /* 386 * Not an update, or updating the name: look up the name 387 * and verify that it refers to a sensible block device. 388 */ 389 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 390 if ((error = namei(ndp)) != 0) 391 return (error); 392 devvp = ndp->ni_vp; 393 if (devvp->v_type != VBLK) { 394 vrele(devvp); 395 return (ENOTBLK); 396 } 397 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 398 vrele(devvp); 399 return (ENXIO); 400 } 401 /* 402 * If mount by non-root, then verify that user has necessary 403 * permissions on the device. 404 */ 405 if (p->p_ucred->cr_uid != 0) { 406 accessmode = VREAD; 407 if ((mp->mnt_flag & MNT_RDONLY) == 0) 408 accessmode |= VWRITE; 409 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 410 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 411 if (error) { 412 vput(devvp); 413 return (error); 414 } 415 VOP_UNLOCK(devvp, 0); 416 } 417 if ((mp->mnt_flag & MNT_UPDATE) == 0) 418 error = lfs_mountfs(devvp, mp, p); /* LFS */ 419 else { 420 if (devvp != ump->um_devvp) 421 error = EINVAL; /* needs translation */ 422 else 423 vrele(devvp); 424 } 425 if (error) { 426 vrele(devvp); 427 return (error); 428 } 429 ump = VFSTOUFS(mp); 430 fs = ump->um_lfs; /* LFS */ 431 return set_statfs_info(path, UIO_USERSPACE, args.fspec, 432 UIO_USERSPACE, mp, p); 433 } 434 435 /* 436 * Roll-forward code. 437 */ 438 439 /* 440 * Load the appropriate indirect block, and change the appropriate pointer. 441 * Mark the block dirty. Do segment and avail accounting. 442 */ 443 static int 444 update_meta(struct lfs *fs, ino_t ino, int version, daddr_t lbn, 445 daddr_t ndaddr, size_t size, struct proc *p) 446 { 447 int error; 448 struct vnode *vp; 449 struct inode *ip; 450 daddr_t odaddr, ooff; 451 struct indir a[NIADDR], *ap; 452 struct buf *bp; 453 SEGUSE *sup; 454 int num; 455 456 if ((error = lfs_rf_valloc(fs, ino, version, p, &vp)) != 0) { 457 #ifdef DEBUG_LFS_RFW 458 printf("update_meta: ino %d: lfs_rf_valloc returned %d\n", ino, 459 error); 460 #endif 461 return error; 462 } 463 464 if ((error = VOP_BALLOC(vp, (lbn << fs->lfs_bshift), size, 465 NOCRED, 0, &bp)) != 0) { 466 vput(vp); 467 return (error); 468 } 469 /* No need to write, the block is already on disk */ 470 if (bp->b_flags & B_DELWRI) { 471 LFS_UNLOCK_BUF(bp); 472 fs->lfs_avail += btofsb(fs, bp->b_bcount); 473 } 474 bp->b_flags |= B_INVAL; 475 brelse(bp); 476 477 /* 478 * Extend the file, if it is not large enough already. 479 * XXX this is not exactly right, we don't know how much of the 480 * XXX last block is actually used. We hope that an inode will 481 * XXX appear later to give the correct size. 482 */ 483 ip = VTOI(vp); 484 if (ip->i_size <= (lbn << fs->lfs_bshift)) { 485 if (lbn < NDADDR) 486 ip->i_size = ip->i_ffs1_size = (lbn << fs->lfs_bshift) + 487 (size - fs->lfs_fsize) + 1; 488 else 489 ip->i_size = ip->i_ffs1_size = 490 (lbn << fs->lfs_bshift) + 1; 491 } 492 493 error = ufs_bmaparray(vp, lbn, &odaddr, &a[0], &num, NULL, NULL); 494 if (error) { 495 #ifdef DEBUG_LFS_RFW 496 printf("update_meta: ufs_bmaparray returned %d\n", error); 497 #endif 498 vput(vp); 499 return error; 500 } 501 switch (num) { 502 case 0: 503 ooff = ip->i_ffs1_db[lbn]; 504 if (ooff == UNWRITTEN) 505 ip->i_ffs1_blocks += btofsb(fs, size); 506 /* XXX what about fragment extension? */ 507 ip->i_ffs1_db[lbn] = ndaddr; 508 break; 509 case 1: 510 ooff = ip->i_ffs1_ib[a[0].in_off]; 511 if (ooff == UNWRITTEN) 512 ip->i_ffs1_blocks += btofsb(fs, size); 513 ip->i_ffs1_ib[a[0].in_off] = ndaddr; 514 break; 515 default: 516 ap = &a[num - 1]; 517 if (bread(vp, ap->in_lbn, fs->lfs_bsize, NOCRED, &bp)) 518 panic("update_meta: bread bno %lld", 519 (long long)ap->in_lbn); 520 521 /* XXX ondisk32 */ 522 ooff = ((int32_t *)bp->b_data)[ap->in_off]; 523 if (ooff == UNWRITTEN) 524 ip->i_ffs1_blocks += btofsb(fs, size); 525 /* XXX ondisk32 */ 526 ((int32_t *)bp->b_data)[ap->in_off] = ndaddr; 527 (void) VOP_BWRITE(bp); 528 } 529 LFS_SET_UINO(ip, IN_CHANGE | IN_MODIFIED | IN_UPDATE); 530 531 /* Update segment usage information. */ 532 if (odaddr > 0) { 533 LFS_SEGENTRY(sup, fs, dtosn(fs, dbtofsb(fs, odaddr)), bp); 534 #ifdef DIAGNOSTIC 535 if (sup->su_nbytes < size) { 536 panic("update_meta: negative bytes " 537 "(segment %" PRIu32 " short by %ld)\n", 538 dtosn(fs, dbtofsb(fs, odaddr)), (long)size - sup->su_nbytes); 539 sup->su_nbytes = size; 540 } 541 #endif 542 sup->su_nbytes -= size; 543 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, dbtofsb(fs, odaddr)), bp); 544 } 545 LFS_SEGENTRY(sup, fs, dtosn(fs, ndaddr), bp); 546 sup->su_nbytes += size; 547 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, ndaddr), bp); 548 549 /* Fix this so it can be released */ 550 /* ip->i_lfs_effnblks = ip->i_ffs1_blocks; */ 551 552 #ifdef DEBUG_LFS_RFW 553 /* Now look again to make sure it worked */ 554 ufs_bmaparray(vp, lbn, &odaddr, &a[0], &num, NULL, NULL); 555 if (dbtofsb(fs, odaddr) != ndaddr) 556 printf("update_meta: failed setting ino %d lbn %" PRId64 557 " to %" PRId64 "\n", ino, lbn, ndaddr); 558 #endif 559 vput(vp); 560 return 0; 561 } 562 563 static int 564 update_inoblk(struct lfs *fs, daddr_t offset, struct ucred *cred, 565 struct proc *p) 566 { 567 struct vnode *devvp, *vp; 568 struct inode *ip; 569 struct ufs1_dinode *dip; 570 struct buf *dbp, *ibp; 571 int error; 572 daddr_t daddr; 573 IFILE *ifp; 574 SEGUSE *sup; 575 576 devvp = VTOI(fs->lfs_ivnode)->i_devvp; 577 578 /* 579 * Get the inode, update times and perms. 580 * DO NOT update disk blocks, we do that separately. 581 */ 582 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_ibsize, cred, &dbp); 583 if (error) { 584 #ifdef DEBUG_LFS_RFW 585 printf("update_inoblk: bread returned %d\n", error); 586 #endif 587 return error; 588 } 589 dip = ((struct ufs1_dinode *)(dbp->b_data)) + INOPB(fs); 590 while (--dip >= (struct ufs1_dinode *)dbp->b_data) { 591 if (dip->di_inumber > LFS_IFILE_INUM) { 592 /* printf("ino %d version %d\n", dip->di_inumber, 593 dip->di_gen); */ 594 error = lfs_rf_valloc(fs, dip->di_inumber, dip->di_gen, 595 p, &vp); 596 if (error) { 597 #ifdef DEBUG_LFS_RFW 598 printf("update_inoblk: lfs_rf_valloc returned %d\n", error); 599 #endif 600 continue; 601 } 602 ip = VTOI(vp); 603 if (dip->di_size != ip->i_size) 604 VOP_TRUNCATE(vp, dip->di_size, 0, NOCRED, p); 605 /* Get mode, link count, size, and times */ 606 memcpy(ip->i_din.ffs1_din, dip, 607 offsetof(struct ufs1_dinode, di_db[0])); 608 609 /* Then the rest, except di_blocks */ 610 ip->i_flags = ip->i_ffs1_flags = dip->di_flags; 611 ip->i_gen = ip->i_ffs1_gen = dip->di_gen; 612 ip->i_uid = ip->i_ffs1_uid = dip->di_uid; 613 ip->i_gid = ip->i_ffs1_gid = dip->di_gid; 614 615 ip->i_mode = ip->i_ffs1_mode; 616 ip->i_nlink = ip->i_ffs_effnlink = ip->i_ffs1_nlink; 617 ip->i_size = ip->i_ffs1_size; 618 619 LFS_SET_UINO(ip, IN_CHANGE | IN_MODIFIED | IN_UPDATE); 620 621 /* Re-initialize to get type right */ 622 ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, 623 &vp); 624 vput(vp); 625 626 /* Record change in location */ 627 LFS_IENTRY(ifp, fs, dip->di_inumber, ibp); 628 daddr = ifp->if_daddr; 629 ifp->if_daddr = dbtofsb(fs, dbp->b_blkno); 630 error = LFS_BWRITE_LOG(ibp); /* Ifile */ 631 /* And do segment accounting */ 632 if (dtosn(fs, daddr) != dtosn(fs, dbtofsb(fs, dbp->b_blkno))) { 633 if (daddr > 0) { 634 LFS_SEGENTRY(sup, fs, dtosn(fs, daddr), 635 ibp); 636 sup->su_nbytes -= sizeof (struct ufs1_dinode); 637 LFS_WRITESEGENTRY(sup, fs, 638 dtosn(fs, daddr), 639 ibp); 640 } 641 LFS_SEGENTRY(sup, fs, dtosn(fs, dbtofsb(fs, dbp->b_blkno)), 642 ibp); 643 sup->su_nbytes += sizeof (struct ufs1_dinode); 644 LFS_WRITESEGENTRY(sup, fs, 645 dtosn(fs, dbtofsb(fs, dbp->b_blkno)), 646 ibp); 647 } 648 } 649 } 650 dbp->b_flags |= B_AGE; 651 brelse(dbp); 652 653 return 0; 654 } 655 656 #define CHECK_CKSUM 0x0001 /* Check the checksum to make sure it's valid */ 657 #define CHECK_UPDATE 0x0002 /* Update Ifile for new data blocks / inodes */ 658 659 static daddr_t 660 check_segsum(struct lfs *fs, daddr_t offset, 661 struct ucred *cred, int flags, int *pseg_flags, struct proc *p) 662 { 663 struct vnode *devvp; 664 struct buf *bp, *dbp; 665 int error, nblocks, ninos, i, j; 666 SEGSUM *ssp; 667 u_long *dp, *datap; /* XXX u_int32_t */ 668 daddr_t oldoffset; 669 int32_t *iaddr; /* XXX ondisk32 */ 670 FINFO *fip; 671 SEGUSE *sup; 672 size_t size; 673 u_int64_t serial; 674 675 devvp = VTOI(fs->lfs_ivnode)->i_devvp; 676 /* 677 * If the segment has a superblock and we're at the top 678 * of the segment, skip the superblock. 679 */ 680 if (sntod(fs, dtosn(fs, offset)) == offset) { 681 LFS_SEGENTRY(sup, fs, dtosn(fs, offset), bp); 682 if (sup->su_flags & SEGUSE_SUPERBLOCK) 683 offset += btofsb(fs, LFS_SBPAD); 684 brelse(bp); 685 } 686 687 /* Read in the segment summary */ 688 error = bread(devvp, offset, fs->lfs_sumsize, cred, &bp); 689 if (error) 690 return -1; 691 692 /* Check summary checksum */ 693 ssp = (SEGSUM *)bp->b_data; 694 if (flags & CHECK_CKSUM) { 695 if (ssp->ss_sumsum != cksum(&ssp->ss_datasum, 696 fs->lfs_sumsize - 697 sizeof(ssp->ss_sumsum))) { 698 #ifdef DEBUG_LFS_RFW 699 printf("Sumsum error at 0x%" PRIx64 "\n", offset); 700 #endif 701 offset = -1; 702 goto err1; 703 } 704 if (ssp->ss_nfinfo == 0 && ssp->ss_ninos == 0) { 705 #ifdef DEBUG_LFS_RFW 706 printf("Empty pseg at 0x%" PRIx64 "\n", offset); 707 #endif 708 offset = -1; 709 goto err1; 710 } 711 if (ssp->ss_create < fs->lfs_tstamp) { 712 #ifdef DEBUG_LFS_RFW 713 printf("Old data at 0x%" PRIx64 "\n", offset); 714 #endif 715 offset = -1; 716 goto err1; 717 } 718 } 719 if (fs->lfs_version > 1) { 720 serial = ssp->ss_serial; 721 if (serial != fs->lfs_serial + 1) { 722 #ifdef DEBUG_LFS_RFW 723 printf("Unexpected serial number at 0x%" PRIx64 724 "\n", offset); 725 #endif 726 offset = -1; 727 goto err1; 728 } 729 if (ssp->ss_ident != fs->lfs_ident) { 730 #ifdef DEBUG_LFS_RFW 731 printf("Incorrect fsid (0x%x vs 0x%x) at 0x%" 732 PRIx64 "\n", ssp->ss_ident, fs->lfs_ident, offset); 733 #endif 734 offset = -1; 735 goto err1; 736 } 737 } 738 if (pseg_flags) 739 *pseg_flags = ssp->ss_flags; 740 oldoffset = offset; 741 offset += btofsb(fs, fs->lfs_sumsize); 742 743 ninos = howmany(ssp->ss_ninos, INOPB(fs)); 744 /* XXX ondisk32 */ 745 iaddr = (int32_t *)(bp->b_data + fs->lfs_sumsize - sizeof(int32_t)); 746 if (flags & CHECK_CKSUM) { 747 /* Count blocks */ 748 nblocks = 0; 749 fip = (FINFO *)(bp->b_data + SEGSUM_SIZE(fs)); 750 for (i = 0; i < ssp->ss_nfinfo; ++i) { 751 nblocks += fip->fi_nblocks; 752 if (fip->fi_nblocks <= 0) 753 break; 754 /* XXX ondisk32 */ 755 fip = (FINFO *)(((char *)fip) + FINFOSIZE + 756 (fip->fi_nblocks * sizeof(int32_t))); 757 } 758 nblocks += ninos; 759 /* Create the sum array */ 760 datap = dp = (u_long *)malloc(nblocks * sizeof(u_long), 761 M_SEGMENT, M_WAITOK); 762 } 763 764 /* Handle individual blocks */ 765 fip = (FINFO *)(bp->b_data + SEGSUM_SIZE(fs)); 766 for (i = 0; i < ssp->ss_nfinfo || ninos; ++i) { 767 /* Inode block? */ 768 if (ninos && *iaddr == offset) { 769 if (flags & CHECK_CKSUM) { 770 /* Read in the head and add to the buffer */ 771 error = bread(devvp, fsbtodb(fs, offset), fs->lfs_bsize, 772 cred, &dbp); 773 if (error) { 774 offset = -1; 775 goto err2; 776 } 777 (*dp++) = ((u_long *)(dbp->b_data))[0]; 778 dbp->b_flags |= B_AGE; 779 brelse(dbp); 780 } 781 if (flags & CHECK_UPDATE) { 782 if ((error = update_inoblk(fs, offset, cred, p)) 783 != 0) { 784 offset = -1; 785 goto err2; 786 } 787 } 788 offset += btofsb(fs, fs->lfs_ibsize); 789 --iaddr; 790 --ninos; 791 --i; /* compensate */ 792 continue; 793 } 794 /* printf("check: blocks from ino %d version %d\n", 795 fip->fi_ino, fip->fi_version); */ 796 size = fs->lfs_bsize; 797 for (j = 0; j < fip->fi_nblocks; ++j) { 798 if (j == fip->fi_nblocks - 1) 799 size = fip->fi_lastlength; 800 if (flags & CHECK_CKSUM) { 801 error = bread(devvp, fsbtodb(fs, offset), size, cred, &dbp); 802 if (error) { 803 offset = -1; 804 goto err2; 805 } 806 (*dp++) = ((u_long *)(dbp->b_data))[0]; 807 dbp->b_flags |= B_AGE; 808 brelse(dbp); 809 } 810 /* Account for and update any direct blocks */ 811 if ((flags & CHECK_UPDATE) && 812 fip->fi_ino > LFS_IFILE_INUM && 813 fip->fi_blocks[j] >= 0) { 814 update_meta(fs, fip->fi_ino, fip->fi_version, 815 fip->fi_blocks[j], offset, size, p); 816 } 817 offset += btofsb(fs, size); 818 } 819 /* XXX ondisk32 */ 820 fip = (FINFO *)(((char *)fip) + FINFOSIZE 821 + fip->fi_nblocks * sizeof(int32_t)); 822 } 823 /* Checksum the array, compare */ 824 if ((flags & CHECK_CKSUM) && 825 ssp->ss_datasum != cksum(datap, nblocks * sizeof(u_long))) 826 { 827 #ifdef DEBUG_LFS_RFW 828 printf("Datasum error at 0x%" PRIx64 " (wanted %x got %x)\n", 829 offset, ssp->ss_datasum, cksum(datap, nblocks * 830 sizeof(u_long))); 831 #endif 832 offset = -1; 833 goto err2; 834 } 835 836 /* If we're at the end of the segment, move to the next */ 837 if (dtosn(fs, offset + btofsb(fs, fs->lfs_sumsize + fs->lfs_bsize)) != 838 dtosn(fs, offset)) { 839 if (dtosn(fs, offset) == dtosn(fs, ssp->ss_next)) { 840 offset = -1; 841 goto err2; 842 } 843 offset = ssp->ss_next; 844 #ifdef DEBUG_LFS_RFW 845 printf("LFS roll forward: moving on to offset 0x%" PRIx64 846 " -> segment %d\n", offset, dtosn(fs,offset)); 847 #endif 848 } 849 850 if (flags & CHECK_UPDATE) { 851 fs->lfs_avail -= (offset - oldoffset); 852 /* Don't clog the buffer queue */ 853 if (locked_queue_count > LFS_MAX_BUFS || 854 locked_queue_bytes > LFS_MAX_BYTES) { 855 ++fs->lfs_writer; 856 lfs_flush(fs, SEGM_CKP); 857 if (--fs->lfs_writer == 0) 858 wakeup(&fs->lfs_dirops); 859 } 860 } 861 862 err2: 863 if (flags & CHECK_CKSUM) 864 free(datap, M_SEGMENT); 865 err1: 866 bp->b_flags |= B_AGE; 867 brelse(bp); 868 869 /* XXX should we update the serial number even for bad psegs? */ 870 if ((flags & CHECK_UPDATE) && offset > 0 && fs->lfs_version > 1) 871 fs->lfs_serial = serial; 872 return offset; 873 } 874 875 /* 876 * Common code for mount and mountroot 877 * LFS specific 878 */ 879 int 880 lfs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p) 881 { 882 extern struct vnode *rootvp; 883 struct dlfs *tdfs, *dfs, *adfs; 884 struct lfs *fs; 885 struct ufsmount *ump; 886 struct vnode *vp; 887 struct buf *bp, *abp; 888 struct partinfo dpart; 889 dev_t dev; 890 int error, i, ronly, secsize, fsbsize; 891 struct ucred *cred; 892 CLEANERINFO *cip; 893 SEGUSE *sup; 894 int flags, dirty, do_rollforward; 895 daddr_t offset, oldoffset, lastgoodpseg, sb_addr; 896 int sn, curseg; 897 898 cred = p ? p->p_ucred : NOCRED; 899 /* 900 * Disallow multiple mounts of the same device. 901 * Disallow mounting of a device that is currently in use 902 * (except for root, which might share swap device for miniroot). 903 * Flush out any old buffers remaining from a previous use. 904 */ 905 if ((error = vfs_mountedon(devvp)) != 0) 906 return (error); 907 if (vcount(devvp) > 1 && devvp != rootvp) 908 return (EBUSY); 909 if ((error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0)) != 0) 910 return (error); 911 912 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 913 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 914 if (error) 915 return (error); 916 if (VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, p) != 0) 917 secsize = DEV_BSIZE; 918 else 919 secsize = dpart.disklab->d_secsize; 920 921 /* Don't free random space on error. */ 922 bp = NULL; 923 abp = NULL; 924 ump = NULL; 925 926 sb_addr = LFS_LABELPAD / secsize; 927 while (1) { 928 /* Read in the superblock. */ 929 error = bread(devvp, sb_addr, LFS_SBPAD, cred, &bp); 930 if (error) 931 goto out; 932 dfs = (struct dlfs *)bp->b_data; 933 934 /* Check the basics. */ 935 if (dfs->dlfs_magic != LFS_MAGIC || dfs->dlfs_bsize >= MAXBSIZE || 936 dfs->dlfs_version > LFS_VERSION || 937 dfs->dlfs_bsize < sizeof(struct dlfs)) { 938 #ifdef DEBUG_LFS 939 printf("lfs_mountfs: primary superblock sanity failed\n"); 940 #endif 941 error = EINVAL; /* XXX needs translation */ 942 goto out; 943 } 944 if (dfs->dlfs_inodefmt > LFS_MAXINODEFMT) 945 printf("lfs_mountfs: warning: unknown inode format %d\n", 946 dfs->dlfs_inodefmt); 947 948 if (dfs->dlfs_version == 1) 949 fsbsize = secsize; 950 else { 951 fsbsize = 1 << (dfs->dlfs_bshift - dfs->dlfs_blktodb + 952 dfs->dlfs_fsbtodb); 953 /* 954 * Could be, if the frag size is large enough, that we 955 * don't have the "real" primary superblock. If that's 956 * the case, get the real one, and try again. 957 */ 958 if (sb_addr != dfs->dlfs_sboffs[0] << 959 dfs->dlfs_fsbtodb) { 960 /* #ifdef DEBUG_LFS */ 961 printf("lfs_mountfs: sb daddr 0x%llx is not right, trying 0x%llx\n", 962 (long long)sb_addr, (long long)(dfs->dlfs_sboffs[0] << 963 dfs->dlfs_fsbtodb)); 964 /* #endif */ 965 sb_addr = dfs->dlfs_sboffs[0] << 966 dfs->dlfs_fsbtodb; 967 brelse(bp); 968 continue; 969 } 970 } 971 break; 972 } 973 974 /* 975 * Check the second superblock to see which is newer; then mount 976 * using the older of the two. This is necessary to ensure that 977 * the filesystem is valid if it was not unmounted cleanly. 978 */ 979 980 if (dfs->dlfs_sboffs[1] && 981 dfs->dlfs_sboffs[1] - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) 982 { 983 error = bread(devvp, dfs->dlfs_sboffs[1] * (fsbsize / secsize), 984 LFS_SBPAD, cred, &abp); 985 if (error) 986 goto out; 987 adfs = (struct dlfs *)abp->b_data; 988 989 if (dfs->dlfs_version == 1) { 990 /* 1s resolution comparison */ 991 if (adfs->dlfs_tstamp < dfs->dlfs_tstamp) 992 tdfs = adfs; 993 else 994 tdfs = dfs; 995 } else { 996 /* monotonic infinite-resolution comparison */ 997 if (adfs->dlfs_serial < dfs->dlfs_serial) 998 tdfs = adfs; 999 else 1000 tdfs = dfs; 1001 } 1002 1003 /* Check the basics. */ 1004 if (tdfs->dlfs_magic != LFS_MAGIC || 1005 tdfs->dlfs_bsize > MAXBSIZE || 1006 tdfs->dlfs_version > LFS_VERSION || 1007 tdfs->dlfs_bsize < sizeof(struct dlfs)) { 1008 #ifdef DEBUG_LFS 1009 printf("lfs_mountfs: alt superblock sanity failed\n"); 1010 #endif 1011 error = EINVAL; /* XXX needs translation */ 1012 goto out; 1013 } 1014 } else { 1015 #ifdef DEBUG_LFS 1016 printf("lfs_mountfs: invalid alt superblock daddr=0x%x\n", 1017 dfs->dlfs_sboffs[1]); 1018 #endif 1019 error = EINVAL; 1020 goto out; 1021 } 1022 1023 /* Allocate the mount structure, copy the superblock into it. */ 1024 fs = malloc(sizeof(struct lfs), M_UFSMNT, M_WAITOK | M_ZERO); 1025 memcpy(&fs->lfs_dlfs, tdfs, sizeof(struct dlfs)); 1026 1027 /* Compatibility */ 1028 if (fs->lfs_version < 2) { 1029 fs->lfs_sumsize = LFS_V1_SUMMARY_SIZE; 1030 fs->lfs_ibsize = fs->lfs_bsize; 1031 fs->lfs_start = fs->lfs_sboffs[0]; 1032 fs->lfs_tstamp = fs->lfs_otstamp; 1033 fs->lfs_fsbtodb = 0; 1034 } 1035 1036 /* Before rolling forward, lock so vget will sleep for other procs */ 1037 fs->lfs_flags = LFS_NOTYET; 1038 fs->lfs_rfpid = p->p_pid; 1039 1040 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 1041 ump->um_lfs = fs; 1042 ump->um_fstype = UFS1; 1043 if (sizeof(struct lfs) < LFS_SBPAD) { /* XXX why? */ 1044 bp->b_flags |= B_INVAL; 1045 abp->b_flags |= B_INVAL; 1046 } 1047 brelse(bp); 1048 bp = NULL; 1049 brelse(abp); 1050 abp = NULL; 1051 1052 /* Set up the I/O information */ 1053 fs->lfs_devbsize = secsize; 1054 fs->lfs_iocount = 0; 1055 fs->lfs_diropwait = 0; 1056 fs->lfs_activesb = 0; 1057 fs->lfs_uinodes = 0; 1058 fs->lfs_ravail = 0; 1059 fs->lfs_sbactive = 0; 1060 1061 /* Set up the ifile and lock aflags */ 1062 fs->lfs_doifile = 0; 1063 fs->lfs_writer = 0; 1064 fs->lfs_dirops = 0; 1065 fs->lfs_nadirop = 0; 1066 fs->lfs_seglock = 0; 1067 fs->lfs_pdflush = 0; 1068 fs->lfs_sleepers = 0; 1069 simple_lock_init(&fs->lfs_interlock); 1070 lockinit(&fs->lfs_fraglock, PINOD, "lfs_fraglock", 0, 0); 1071 1072 /* Set the file system readonly/modify bits. */ 1073 fs->lfs_ronly = ronly; 1074 if (ronly == 0) 1075 fs->lfs_fmod = 1; 1076 1077 /* Initialize the mount structure. */ 1078 dev = devvp->v_rdev; 1079 mp->mnt_data = ump; 1080 mp->mnt_stat.f_fsid.val[0] = (long)dev; 1081 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_LFS); 1082 mp->mnt_stat.f_iosize = fs->lfs_bsize; 1083 mp->mnt_maxsymlinklen = fs->lfs_maxsymlinklen; 1084 mp->mnt_flag |= MNT_LOCAL; 1085 mp->mnt_fs_bshift = fs->lfs_bshift; 1086 ump->um_flags = 0; 1087 ump->um_mountp = mp; 1088 ump->um_dev = dev; 1089 ump->um_devvp = devvp; 1090 ump->um_bptrtodb = fs->lfs_fsbtodb; 1091 ump->um_seqinc = fragstofsb(fs, fs->lfs_frag); 1092 ump->um_nindir = fs->lfs_nindir; 1093 ump->um_lognindir = ffs(fs->lfs_nindir) - 1; 1094 for (i = 0; i < MAXQUOTAS; i++) 1095 ump->um_quotas[i] = NULLVP; 1096 devvp->v_specmountpoint = mp; 1097 1098 /* Set up reserved memory for pageout */ 1099 lfs_setup_resblks(fs); 1100 /* Set up vdirop tailq */ 1101 TAILQ_INIT(&fs->lfs_dchainhd); 1102 /* and paging tailq */ 1103 TAILQ_INIT(&fs->lfs_pchainhd); 1104 1105 /* 1106 * We use the ifile vnode for almost every operation. Instead of 1107 * retrieving it from the hash table each time we retrieve it here, 1108 * artificially increment the reference count and keep a pointer 1109 * to it in the incore copy of the superblock. 1110 */ 1111 if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { 1112 #ifdef DEBUG 1113 printf("lfs_mountfs: ifile vget failed, error=%d\n", error); 1114 #endif 1115 goto out; 1116 } 1117 fs->lfs_ivnode = vp; 1118 VREF(vp); 1119 1120 /* Set up segment usage flags for the autocleaner. */ 1121 fs->lfs_nactive = 0; 1122 fs->lfs_suflags = (u_int32_t **)malloc(2 * sizeof(u_int32_t *), 1123 M_SEGMENT, M_WAITOK); 1124 fs->lfs_suflags[0] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1125 M_SEGMENT, M_WAITOK); 1126 fs->lfs_suflags[1] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1127 M_SEGMENT, M_WAITOK); 1128 memset(fs->lfs_suflags[1], 0, fs->lfs_nseg * sizeof(u_int32_t)); 1129 for (i = 0; i < fs->lfs_nseg; i++) { 1130 int changed; 1131 1132 LFS_SEGENTRY(sup, fs, i, bp); 1133 changed = 0; 1134 if (!ronly) { 1135 if (sup->su_nbytes == 0 && 1136 !(sup->su_flags & SEGUSE_EMPTY)) { 1137 sup->su_flags |= SEGUSE_EMPTY; 1138 ++changed; 1139 } else if (!(sup->su_nbytes == 0) && 1140 (sup->su_flags & SEGUSE_EMPTY)) { 1141 sup->su_flags &= ~SEGUSE_EMPTY; 1142 ++changed; 1143 } 1144 if (sup->su_flags & SEGUSE_ACTIVE) { 1145 sup->su_flags &= ~SEGUSE_ACTIVE; 1146 ++changed; 1147 } 1148 } 1149 fs->lfs_suflags[0][i] = sup->su_flags; 1150 if (changed) 1151 LFS_WRITESEGENTRY(sup, fs, i, bp); 1152 else 1153 brelse(bp); 1154 } 1155 1156 /* 1157 * Roll forward. 1158 * 1159 * We don't automatically roll forward for v1 filesystems, because 1160 * of the danger that the clock was turned back between the last 1161 * checkpoint and crash. This would roll forward garbage. 1162 * 1163 * v2 filesystems don't have this problem because they use a 1164 * monotonically increasing serial number instead of a timestamp. 1165 */ 1166 #ifdef LFS_DO_ROLLFORWARD 1167 do_rollforward = !fs->lfs_ronly; 1168 #else 1169 do_rollforward = (fs->lfs_version > 1 && !fs->lfs_ronly && 1170 !(fs->lfs_pflags & LFS_PF_CLEAN)); 1171 #endif 1172 if (do_rollforward) { 1173 /* 1174 * Phase I: Find the address of the last good partial 1175 * segment that was written after the checkpoint. Mark 1176 * the segments in question dirty, so they won't be 1177 * reallocated. 1178 */ 1179 lastgoodpseg = oldoffset = offset = fs->lfs_offset; 1180 flags = 0x0; 1181 #ifdef DEBUG_LFS_RFW 1182 printf("LFS roll forward phase 1: starting at offset 0x%" 1183 PRIx64 "\n", offset); 1184 #endif 1185 LFS_SEGENTRY(sup, fs, dtosn(fs, offset), bp); 1186 if (!(sup->su_flags & SEGUSE_DIRTY)) 1187 --fs->lfs_nclean; 1188 sup->su_flags |= SEGUSE_DIRTY; 1189 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, offset), bp); 1190 while ((offset = check_segsum(fs, offset, cred, CHECK_CKSUM, 1191 &flags, p)) > 0) 1192 { 1193 if (sntod(fs, oldoffset) != sntod(fs, offset)) { 1194 LFS_SEGENTRY(sup, fs, dtosn(fs, oldoffset), 1195 bp); 1196 if (!(sup->su_flags & SEGUSE_DIRTY)) 1197 --fs->lfs_nclean; 1198 sup->su_flags |= SEGUSE_DIRTY; 1199 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, oldoffset), 1200 bp); 1201 } 1202 1203 #ifdef DEBUG_LFS_RFW 1204 printf("LFS roll forward phase 1: offset=0x%" 1205 PRIx64 "\n", offset); 1206 if (flags & SS_DIROP) { 1207 printf("lfs_mountfs: dirops at 0x%" PRIx64 "\n", 1208 oldoffset); 1209 if (!(flags & SS_CONT)) 1210 printf("lfs_mountfs: dirops end " 1211 "at 0x%" PRIx64 "\n", oldoffset); 1212 } 1213 #endif 1214 if (!(flags & SS_CONT)) 1215 lastgoodpseg = offset; 1216 oldoffset = offset; 1217 } 1218 #ifdef DEBUG_LFS_RFW 1219 if (flags & SS_CONT) { 1220 printf("LFS roll forward: warning: incomplete " 1221 "dirops discarded\n"); 1222 } 1223 printf("LFS roll forward phase 1: completed: " 1224 "lastgoodpseg=0x%" PRIx64 "\n", lastgoodpseg); 1225 #endif 1226 oldoffset = fs->lfs_offset; 1227 if (fs->lfs_offset != lastgoodpseg) { 1228 /* Don't overwrite what we're trying to preserve */ 1229 offset = fs->lfs_offset; 1230 fs->lfs_offset = lastgoodpseg; 1231 fs->lfs_curseg = sntod(fs, dtosn(fs, fs->lfs_offset)); 1232 for (sn = curseg = dtosn(fs, fs->lfs_curseg);;) { 1233 sn = (sn + 1) % fs->lfs_nseg; 1234 if (sn == curseg) 1235 panic("lfs_mountfs: no clean segments"); 1236 LFS_SEGENTRY(sup, fs, sn, bp); 1237 dirty = (sup->su_flags & SEGUSE_DIRTY); 1238 brelse(bp); 1239 if (!dirty) 1240 break; 1241 } 1242 fs->lfs_nextseg = sntod(fs, sn); 1243 1244 /* 1245 * Phase II: Roll forward from the first superblock. 1246 */ 1247 while (offset != lastgoodpseg) { 1248 #ifdef DEBUG_LFS_RFW 1249 printf("LFS roll forward phase 2: 0x%" 1250 PRIx64 "\n", offset); 1251 #endif 1252 offset = check_segsum(fs, offset, cred, 1253 CHECK_UPDATE, NULL, p); 1254 } 1255 1256 /* 1257 * Finish: flush our changes to disk. 1258 */ 1259 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1260 printf("lfs_mountfs: roll forward recovered %lld blocks\n", 1261 (long long)(lastgoodpseg - oldoffset)); 1262 } 1263 #ifdef DEBUG_LFS_RFW 1264 printf("LFS roll forward complete\n"); 1265 #endif 1266 } 1267 /* If writing, sb is not clean; record in case of immediate crash */ 1268 if (!fs->lfs_ronly) { 1269 fs->lfs_pflags &= ~LFS_PF_CLEAN; 1270 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1271 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1272 } 1273 1274 /* Allow vget now that roll-forward is complete */ 1275 fs->lfs_flags &= ~(LFS_NOTYET); 1276 wakeup(&fs->lfs_flags); 1277 1278 /* 1279 * Initialize the ifile cleaner info with information from 1280 * the superblock. 1281 */ 1282 LFS_CLEANERINFO(cip, fs, bp); 1283 cip->clean = fs->lfs_nclean; 1284 cip->dirty = fs->lfs_nseg - fs->lfs_nclean; 1285 cip->avail = fs->lfs_avail; 1286 cip->bfree = fs->lfs_bfree; 1287 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 1288 1289 /* 1290 * Mark the current segment as ACTIVE, since we're going to 1291 * be writing to it. 1292 */ 1293 LFS_SEGENTRY(sup, fs, dtosn(fs, fs->lfs_offset), bp); 1294 sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; 1295 fs->lfs_nactive++; 1296 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, fs->lfs_offset), bp); /* Ifile */ 1297 1298 /* Now that roll-forward is done, unlock the Ifile */ 1299 vput(vp); 1300 1301 /* Comment on ifile size if it is too large */ 1302 if (fs->lfs_ivnode->v_size / fs->lfs_bsize > LFS_MAX_BUFS) { 1303 fs->lfs_flags |= LFS_WARNED; 1304 printf("lfs_mountfs: please consider increasing NBUF to at least %lld\n", 1305 (long long)(fs->lfs_ivnode->v_size / fs->lfs_bsize) * (nbuf / LFS_MAX_BUFS)); 1306 } 1307 if (fs->lfs_ivnode->v_size > LFS_MAX_BYTES) { 1308 fs->lfs_flags |= LFS_WARNED; 1309 printf("lfs_mountfs: please consider increasing BUFPAGES to at least %lld\n", 1310 (long long)fs->lfs_ivnode->v_size * bufpages / LFS_MAX_BYTES); 1311 } 1312 1313 return (0); 1314 out: 1315 if (bp) 1316 brelse(bp); 1317 if (abp) 1318 brelse(abp); 1319 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1320 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p); 1321 VOP_UNLOCK(devvp, 0); 1322 if (ump) { 1323 free(ump->um_lfs, M_UFSMNT); 1324 free(ump, M_UFSMNT); 1325 mp->mnt_data = NULL; 1326 } 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 (error); 1334 } 1335 1336 /* 1337 * unmount system call 1338 */ 1339 int 1340 lfs_unmount(struct mount *mp, int mntflags, struct proc *p) 1341 { 1342 struct ufsmount *ump; 1343 struct lfs *fs; 1344 int error, flags, ronly; 1345 int s; 1346 1347 flags = 0; 1348 if (mntflags & MNT_FORCE) 1349 flags |= FORCECLOSE; 1350 1351 ump = VFSTOUFS(mp); 1352 fs = ump->um_lfs; 1353 1354 /* wake up the cleaner so it can die */ 1355 wakeup(&fs->lfs_nextseg); 1356 wakeup(&lfs_allclean_wakeup); 1357 simple_lock(&fs->lfs_interlock); 1358 while (fs->lfs_sleepers) 1359 ltsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers", 0, 1360 &fs->lfs_interlock); 1361 simple_unlock(&fs->lfs_interlock); 1362 1363 #ifdef QUOTA 1364 if (mp->mnt_flag & MNT_QUOTA) { 1365 int i; 1366 error = vflush(mp, fs->lfs_ivnode, SKIPSYSTEM|flags); 1367 if (error) 1368 return (error); 1369 for (i = 0; i < MAXQUOTAS; i++) { 1370 if (ump->um_quotas[i] == NULLVP) 1371 continue; 1372 quotaoff(p, mp, i); 1373 } 1374 /* 1375 * Here we fall through to vflush again to ensure 1376 * that we have gotten rid of all the system vnodes. 1377 */ 1378 } 1379 #endif 1380 if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) 1381 return (error); 1382 if ((error = VFS_SYNC(mp, 1, p->p_ucred, p)) != 0) 1383 return (error); 1384 s = splbio(); 1385 if (LIST_FIRST(&fs->lfs_ivnode->v_dirtyblkhd)) 1386 panic("lfs_unmount: still dirty blocks on ifile vnode"); 1387 splx(s); 1388 1389 /* Comment on ifile size if it has become too large */ 1390 if (!(fs->lfs_flags & LFS_WARNED)) { 1391 if (fs->lfs_ivnode->v_size / fs->lfs_bsize > LFS_MAX_BUFS) 1392 printf("lfs_unmount: please consider increasing" 1393 " NBUF to at least %lld\n", 1394 (long long)(fs->lfs_ivnode->v_size / 1395 fs->lfs_bsize) * 1396 (long long)(nbuf / LFS_MAX_BUFS)); 1397 if (fs->lfs_ivnode->v_size > LFS_MAX_BYTES) 1398 printf("lfs_unmount: please consider increasing" 1399 " BUFPAGES to at least %lld\n", 1400 (long long)fs->lfs_ivnode->v_size * 1401 bufpages / LFS_MAX_BYTES); 1402 } 1403 1404 /* Explicitly write the superblock, to update serial and pflags */ 1405 fs->lfs_pflags |= LFS_PF_CLEAN; 1406 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1407 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1408 while (fs->lfs_iocount) 1409 tsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount", 0); 1410 1411 /* Finish with the Ifile, now that we're done with it */ 1412 vrele(fs->lfs_ivnode); 1413 vgone(fs->lfs_ivnode); 1414 1415 ronly = !fs->lfs_ronly; 1416 if (ump->um_devvp->v_type != VBAD) 1417 ump->um_devvp->v_specmountpoint = NULL; 1418 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1419 error = VOP_CLOSE(ump->um_devvp, 1420 ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 1421 vput(ump->um_devvp); 1422 1423 /* Free per-mount data structures */ 1424 free(fs->lfs_suflags[0], M_SEGMENT); 1425 free(fs->lfs_suflags[1], M_SEGMENT); 1426 free(fs->lfs_suflags, M_SEGMENT); 1427 lfs_free_resblks(fs); 1428 free(fs, M_UFSMNT); 1429 free(ump, M_UFSMNT); 1430 1431 mp->mnt_data = NULL; 1432 mp->mnt_flag &= ~MNT_LOCAL; 1433 return (error); 1434 } 1435 1436 /* 1437 * Get file system statistics. 1438 */ 1439 int 1440 lfs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p) 1441 { 1442 struct lfs *fs; 1443 struct ufsmount *ump; 1444 1445 ump = VFSTOUFS(mp); 1446 fs = ump->um_lfs; 1447 if (fs->lfs_magic != LFS_MAGIC) 1448 panic("lfs_statfs: magic"); 1449 1450 sbp->f_type = 0; 1451 sbp->f_bsize = fs->lfs_fsize; 1452 sbp->f_iosize = fs->lfs_bsize; 1453 sbp->f_blocks = fsbtofrags(fs, LFS_EST_NONMETA(fs)); 1454 sbp->f_bfree = fsbtofrags(fs, LFS_EST_BFREE(fs)); 1455 sbp->f_bavail = fsbtofrags(fs, (long)LFS_EST_BFREE(fs) - 1456 (long)LFS_EST_RSVD(fs)); 1457 1458 sbp->f_files = fs->lfs_bfree / btofsb(fs, fs->lfs_ibsize) * INOPB(fs); 1459 sbp->f_ffree = sbp->f_files - fs->lfs_nfiles; 1460 copy_statfs_info(sbp, mp); 1461 return (0); 1462 } 1463 1464 /* 1465 * Go through the disk queues to initiate sandbagged IO; 1466 * go through the inodes to write those that have been modified; 1467 * initiate the writing of the super block if it has been modified. 1468 * 1469 * Note: we are always called with the filesystem marked `MPBUSY'. 1470 */ 1471 int 1472 lfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct proc *p) 1473 { 1474 int error; 1475 struct lfs *fs; 1476 1477 fs = ((struct ufsmount *)mp->mnt_data)->ufsmount_u.lfs; 1478 if (fs->lfs_ronly) 1479 return 0; 1480 while (fs->lfs_dirops) 1481 error = tsleep(&fs->lfs_writer, PRIBIO + 1, "lfs_dirops", 0); 1482 fs->lfs_writer++; 1483 1484 /* All syncs must be checkpoints until roll-forward is implemented. */ 1485 error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); 1486 if (--fs->lfs_writer == 0) 1487 wakeup(&fs->lfs_dirops); 1488 #ifdef QUOTA 1489 qsync(mp); 1490 #endif 1491 return (error); 1492 } 1493 1494 extern struct lock ufs_hashlock; 1495 1496 /* 1497 * Look up an LFS dinode number to find its incore vnode. If not already 1498 * in core, read it in from the specified device. Return the inode locked. 1499 * Detection and handling of mount points must be done by the calling routine. 1500 */ 1501 int 1502 lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1503 { 1504 struct lfs *fs; 1505 struct ufs1_dinode *dip; 1506 struct inode *ip; 1507 struct buf *bp; 1508 struct ifile *ifp; 1509 struct vnode *vp; 1510 struct ufsmount *ump; 1511 daddr_t daddr; 1512 dev_t dev; 1513 int error, retries; 1514 struct timespec ts; 1515 1516 ump = VFSTOUFS(mp); 1517 dev = ump->um_dev; 1518 fs = ump->um_lfs; 1519 1520 /* 1521 * If the filesystem is not completely mounted yet, suspend 1522 * any access requests (wait for roll-forward to complete). 1523 */ 1524 while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) 1525 tsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet", 0); 1526 1527 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1528 return (0); 1529 1530 if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, &vp)) != 0) { 1531 *vpp = NULL; 1532 return (error); 1533 } 1534 1535 do { 1536 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 1537 ungetnewvnode(vp); 1538 return (0); 1539 } 1540 } while (lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0)); 1541 1542 /* Translate the inode number to a disk address. */ 1543 if (ino == LFS_IFILE_INUM) 1544 daddr = fs->lfs_idaddr; 1545 else { 1546 /* XXX bounds-check this too */ 1547 LFS_IENTRY(ifp, fs, ino, bp); 1548 daddr = ifp->if_daddr; 1549 if (fs->lfs_version > 1) { 1550 ts.tv_sec = ifp->if_atime_sec; 1551 ts.tv_nsec = ifp->if_atime_nsec; 1552 } 1553 1554 brelse(bp); 1555 if (daddr == LFS_UNUSED_DADDR) { 1556 *vpp = NULLVP; 1557 ungetnewvnode(vp); 1558 lockmgr(&ufs_hashlock, LK_RELEASE, 0); 1559 return (ENOENT); 1560 } 1561 } 1562 1563 /* Allocate/init new vnode/inode. */ 1564 lfs_vcreate(mp, ino, vp); 1565 1566 /* 1567 * Put it onto its hash chain and lock it so that other requests for 1568 * this inode will block if they arrive while we are sleeping waiting 1569 * for old data structures to be purged or for the contents of the 1570 * disk portion of this inode to be read. 1571 */ 1572 ip = VTOI(vp); 1573 ufs_ihashins(ip); 1574 lockmgr(&ufs_hashlock, LK_RELEASE, 0); 1575 1576 /* 1577 * XXX 1578 * This may not need to be here, logically it should go down with 1579 * the i_devvp initialization. 1580 * Ask Kirk. 1581 */ 1582 ip->i_lfs = ump->um_lfs; 1583 1584 /* Read in the disk contents for the inode, copy into the inode. */ 1585 retries = 0; 1586 again: 1587 error = bread(ump->um_devvp, fsbtodb(fs, daddr), 1588 (fs->lfs_version == 1 ? fs->lfs_bsize : fs->lfs_ibsize), 1589 NOCRED, &bp); 1590 if (error) { 1591 /* 1592 * The inode does not contain anything useful, so it would 1593 * be misleading to leave it on its hash chain. With mode 1594 * still zero, it will be unlinked and returned to the free 1595 * list by vput(). 1596 */ 1597 vput(vp); 1598 brelse(bp); 1599 *vpp = NULL; 1600 return (error); 1601 } 1602 1603 dip = lfs_ifind(fs, ino, bp); 1604 if (dip == NULL) { 1605 /* Assume write has not completed yet; try again */ 1606 bp->b_flags |= B_INVAL; 1607 brelse(bp); 1608 ++retries; 1609 if (retries > LFS_IFIND_RETRIES) { 1610 #ifdef DEBUG 1611 /* If the seglock is held look at the bpp to see 1612 what is there anyway */ 1613 if (fs->lfs_seglock > 0) { 1614 struct buf **bpp; 1615 struct ufs1_dinode *dp; 1616 int i; 1617 1618 for (bpp = fs->lfs_sp->bpp; 1619 bpp != fs->lfs_sp->cbpp; ++bpp) { 1620 if ((*bpp)->b_vp == fs->lfs_ivnode && 1621 bpp != fs->lfs_sp->bpp) { 1622 /* Inode block */ 1623 printf("block 0x%" PRIx64 ": ", 1624 (*bpp)->b_blkno); 1625 dp = (struct ufs1_dinode *)(*bpp)->b_data; 1626 for (i = 0; i < INOPB(fs); i++) 1627 if (dp[i].di_u.inumber) 1628 printf("%d ", dp[i].di_u.inumber); 1629 printf("\n"); 1630 } 1631 } 1632 } 1633 #endif 1634 panic("lfs_vget: dinode not found"); 1635 } 1636 printf("lfs_vget: dinode %d not found, retrying...\n", ino); 1637 (void)tsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs ifind", 1); 1638 goto again; 1639 } 1640 *ip->i_din.ffs1_din = *dip; 1641 brelse(bp); 1642 1643 if (fs->lfs_version > 1) { 1644 ip->i_ffs1_atime = ts.tv_sec; 1645 ip->i_ffs1_atimensec = ts.tv_nsec; 1646 } 1647 1648 lfs_vinit(mp, vp); 1649 1650 *vpp = vp; 1651 1652 KASSERT(VOP_ISLOCKED(vp)); 1653 1654 return (0); 1655 } 1656 1657 /* 1658 * File handle to vnode 1659 */ 1660 int 1661 lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1662 { 1663 struct lfid *lfhp; 1664 struct buf *bp; 1665 IFILE *ifp; 1666 int32_t daddr; 1667 struct lfs *fs; 1668 1669 lfhp = (struct lfid *)fhp; 1670 if (lfhp->lfid_ino < LFS_IFILE_INUM) 1671 return ESTALE; 1672 1673 fs = VFSTOUFS(mp)->um_lfs; 1674 if (lfhp->lfid_ident != fs->lfs_ident) 1675 return ESTALE; 1676 1677 if (lfhp->lfid_ino > 1678 ((VTOI(fs->lfs_ivnode)->i_ffs1_size >> fs->lfs_bshift) - 1679 fs->lfs_cleansz - fs->lfs_segtabsz) * fs->lfs_ifpb) 1680 return ESTALE; 1681 1682 if (ufs_ihashlookup(VFSTOUFS(mp)->um_dev, lfhp->lfid_ino) == NULLVP) { 1683 LFS_IENTRY(ifp, fs, lfhp->lfid_ino, bp); 1684 daddr = ifp->if_daddr; 1685 brelse(bp); 1686 if (daddr == LFS_UNUSED_DADDR) 1687 return ESTALE; 1688 } 1689 1690 return (ufs_fhtovp(mp, &lfhp->lfid_ufid, vpp)); 1691 } 1692 1693 /* 1694 * Vnode pointer to File handle 1695 */ 1696 /* ARGSUSED */ 1697 int 1698 lfs_vptofh(struct vnode *vp, struct fid *fhp) 1699 { 1700 struct inode *ip; 1701 struct lfid *lfhp; 1702 1703 ip = VTOI(vp); 1704 lfhp = (struct lfid *)fhp; 1705 lfhp->lfid_len = sizeof(struct lfid); 1706 lfhp->lfid_ino = ip->i_number; 1707 lfhp->lfid_gen = ip->i_gen; 1708 lfhp->lfid_ident = ip->i_lfs->lfs_ident; 1709 return (0); 1710 } 1711 1712 int 1713 lfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, size_t newlen, struct proc *p) 1714 { 1715 extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead; 1716 extern struct lfs_stats lfs_stats; 1717 int error; 1718 1719 /* all sysctl names at this level are terminal */ 1720 if (namelen != 1) 1721 return (ENOTDIR); 1722 1723 switch (name[0]) { 1724 case LFS_WRITEINDIR: 1725 return (sysctl_int(oldp, oldlenp, newp, newlen, 1726 &lfs_writeindir)); 1727 case LFS_CLEAN_VNHEAD: 1728 return (sysctl_int(oldp, oldlenp, newp, newlen, 1729 &lfs_clean_vnhead)); 1730 case LFS_DOSTATS: 1731 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, 1732 &lfs_dostats))) 1733 return error; 1734 if (lfs_dostats == 0) 1735 memset(&lfs_stats,0,sizeof(lfs_stats)); 1736 return 0; 1737 default: 1738 return (EOPNOTSUPP); 1739 } 1740 /* NOTREACHED */ 1741 } 1742 1743 static boolean_t 1744 lfs_issequential_hole(const struct ufsmount *ump, 1745 daddr_t daddr0, daddr_t daddr1) 1746 { 1747 1748 /* NOTE: all we want to know here is 'hole or not'. */ 1749 1750 /* 1751 * treat UNWRITTENs and all resident blocks as 'contiguous' 1752 */ 1753 if (daddr0 != 0 && daddr1 != 0) 1754 return TRUE; 1755 1756 /* 1757 * both are in hole? 1758 */ 1759 if (daddr0 == 0 && daddr1 == 0) 1760 return TRUE; /* all holes are 'contiguous' for us. */ 1761 1762 return FALSE; 1763 } 1764 1765 /* 1766 * lfs_gop_write functions exactly like genfs_gop_write, except that 1767 * (1) it requires the seglock to be held by its caller, and sp->fip 1768 * to be properly initialized (it will return without re-initializing 1769 * sp->fip, and without calling lfs_writeseg). 1770 * (2) it uses the remaining space in the segment, rather than VOP_BMAP, 1771 * to determine how large a block it can write at once (though it does 1772 * still use VOP_BMAP to find holes in the file); 1773 * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks 1774 * (leaving lfs_writeseg to deal with the cluster blocks, so we might 1775 * now have clusters of clusters, ick.) 1776 */ 1777 static int 1778 lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, int flags) 1779 { 1780 int i, s, error, run; 1781 int fs_bshift, dev_bshift; 1782 vaddr_t kva; 1783 off_t eof, offset, startoffset; 1784 size_t bytes, iobytes, skipbytes; 1785 daddr_t lbn, blkno; 1786 struct vm_page *pg; 1787 struct buf *mbp, *bp; 1788 struct vnode *devvp = VTOI(vp)->i_devvp; 1789 struct inode *ip = VTOI(vp); 1790 struct lfs *fs = ip->i_lfs; 1791 struct segment *sp = fs->lfs_sp; 1792 UVMHIST_FUNC("lfs_gop_write"); UVMHIST_CALLED(ubchist); 1793 1794 /* The Ifile lives in the buffer cache */ 1795 if (vp == fs->lfs_ivnode) 1796 return genfs_compat_gop_write(vp, pgs, npages, flags); 1797 1798 /* 1799 * Sometimes things slip past the filters in lfs_putpages, 1800 * and the pagedaemon tries to write pages---problem is 1801 * that the pagedaemon never acquires the segment lock. 1802 * 1803 * Unbusy and unclean the pages, and put them on the ACTIVE 1804 * queue under the hypothesis that they couldn't have got here 1805 * unless they were modified *quite* recently. 1806 * 1807 * XXXUBC that last statement is an oversimplification of course. 1808 */ 1809 if (!(fs->lfs_seglock) || fs->lfs_lockpid != curproc->p_pid) { 1810 simple_lock(&vp->v_interlock); 1811 #ifdef DEBUG 1812 printf("lfs_gop_write: seglock not held\n"); 1813 #endif 1814 uvm_lock_pageq(); 1815 for (i = 0; i < npages; i++) { 1816 pg = pgs[i]; 1817 1818 if (pg->flags & PG_PAGEOUT) 1819 uvmexp.paging--; 1820 if (pg->flags & PG_DELWRI) { 1821 uvm_pageunwire(pg); 1822 } 1823 uvm_pageactivate(pg); 1824 pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); 1825 #ifdef DEBUG_LFS 1826 printf("pg[%d]->flags = %x\n", i, pg->flags); 1827 printf("pg[%d]->pqflags = %x\n", i, pg->pqflags); 1828 printf("pg[%d]->uanon = %p\n", i, pg->uanon); 1829 printf("pg[%d]->uobject = %p\n", i, pg->uobject); 1830 printf("pg[%d]->wire_count = %d\n", i, pg->wire_count); 1831 printf("pg[%d]->loan_count = %d\n", i, pg->loan_count); 1832 #endif 1833 } 1834 /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ 1835 uvm_page_unbusy(pgs, npages); 1836 uvm_unlock_pageq(); 1837 simple_unlock(&vp->v_interlock); 1838 return EAGAIN; 1839 } 1840 1841 UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x", 1842 vp, pgs, npages, flags); 1843 1844 GOP_SIZE(vp, vp->v_size, &eof, GOP_SIZE_WRITE); 1845 1846 if (vp->v_type == VREG) { 1847 fs_bshift = vp->v_mount->mnt_fs_bshift; 1848 dev_bshift = vp->v_mount->mnt_dev_bshift; 1849 } else { 1850 fs_bshift = DEV_BSHIFT; 1851 dev_bshift = DEV_BSHIFT; 1852 } 1853 error = 0; 1854 pg = pgs[0]; 1855 startoffset = pg->offset; 1856 bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); 1857 skipbytes = 0; 1858 1859 /* KASSERT(bytes != 0); */ 1860 if (bytes == 0) 1861 printf("ino %d bytes == 0 offset %" PRId64 "\n", 1862 VTOI(vp)->i_number, pgs[0]->offset); 1863 1864 /* Swap PG_DELWRI for PG_PAGEOUT */ 1865 for (i = 0; i < npages; i++) 1866 if (pgs[i]->flags & PG_DELWRI) { 1867 KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); 1868 pgs[i]->flags &= ~PG_DELWRI; 1869 pgs[i]->flags |= PG_PAGEOUT; 1870 uvmexp.paging++; 1871 uvm_lock_pageq(); 1872 uvm_pageunwire(pgs[i]); 1873 uvm_unlock_pageq(); 1874 } 1875 1876 /* 1877 * Check to make sure we're starting on a block boundary. 1878 * We'll check later to make sure we always write entire 1879 * blocks (or fragments). 1880 */ 1881 if (startoffset & fs->lfs_bmask) 1882 printf("%" PRId64 " & %" PRId64 " = %" PRId64 "\n", 1883 startoffset, fs->lfs_bmask, 1884 startoffset & fs->lfs_bmask); 1885 KASSERT((startoffset & fs->lfs_bmask) == 0); 1886 if (bytes & fs->lfs_ffmask) { 1887 printf("lfs_gop_write: asked to write %ld bytes\n", (long)bytes); 1888 panic("lfs_gop_write: non-integer blocks"); 1889 } 1890 1891 kva = uvm_pagermapin(pgs, npages, 1892 UVMPAGER_MAPIN_WRITE | UVMPAGER_MAPIN_WAITOK); 1893 1894 s = splbio(); 1895 simple_lock(&global_v_numoutput_slock); 1896 vp->v_numoutput += 2; /* one for biodone, one for aiodone */ 1897 simple_unlock(&global_v_numoutput_slock); 1898 mbp = pool_get(&bufpool, PR_WAITOK); 1899 splx(s); 1900 1901 memset(mbp, 0, sizeof(*bp)); 1902 BUF_INIT(mbp); 1903 UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x", 1904 vp, mbp, vp->v_numoutput, bytes); 1905 mbp->b_bufsize = npages << PAGE_SHIFT; 1906 mbp->b_data = (void *)kva; 1907 mbp->b_resid = mbp->b_bcount = bytes; 1908 mbp->b_flags = B_BUSY|B_WRITE|B_AGE|B_CALL; 1909 mbp->b_iodone = uvm_aio_biodone; 1910 mbp->b_vp = vp; 1911 1912 bp = NULL; 1913 for (offset = startoffset; 1914 bytes > 0; 1915 offset += iobytes, bytes -= iobytes) { 1916 lbn = offset >> fs_bshift; 1917 error = ufs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, 1918 lfs_issequential_hole); 1919 if (error) { 1920 UVMHIST_LOG(ubchist, "ufs_bmaparray() -> %d", 1921 error,0,0,0); 1922 skipbytes += bytes; 1923 bytes = 0; 1924 break; 1925 } 1926 1927 iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, 1928 bytes); 1929 if (blkno == (daddr_t)-1) { 1930 skipbytes += iobytes; 1931 continue; 1932 } 1933 1934 /* 1935 * Discover how much we can really pack into this buffer. 1936 */ 1937 /* If no room in the current segment, finish it up */ 1938 if (sp->sum_bytes_left < sizeof(int32_t) || 1939 sp->seg_bytes_left < (1 << fs->lfs_bshift)) { 1940 int version; 1941 1942 lfs_updatemeta(sp); 1943 1944 version = sp->fip->fi_version; 1945 (void) lfs_writeseg(fs, sp); 1946 1947 sp->fip->fi_version = version; 1948 sp->fip->fi_ino = ip->i_number; 1949 /* Add the current file to the segment summary. */ 1950 ++((SEGSUM *)(sp->segsum))->ss_nfinfo; 1951 sp->sum_bytes_left -= FINFOSIZE; 1952 } 1953 /* Check both for space in segment and space in segsum */ 1954 iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) 1955 << fs_bshift); 1956 iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) 1957 << fs_bshift); 1958 KASSERT(iobytes > 0); 1959 1960 /* if it's really one i/o, don't make a second buf */ 1961 if (offset == startoffset && iobytes == bytes) { 1962 bp = mbp; 1963 /* printf("bp is mbp\n"); */ 1964 /* correct overcount if there is no second buffer */ 1965 s = splbio(); 1966 simple_lock(&global_v_numoutput_slock); 1967 --vp->v_numoutput; 1968 simple_unlock(&global_v_numoutput_slock); 1969 splx(s); 1970 } else { 1971 /* printf("bp is not mbp\n"); */ 1972 s = splbio(); 1973 bp = pool_get(&bufpool, PR_WAITOK); 1974 UVMHIST_LOG(ubchist, "vp %p bp %p num now %d", 1975 vp, bp, vp->v_numoutput, 0); 1976 splx(s); 1977 memset(bp, 0, sizeof(*bp)); 1978 BUF_INIT(bp); 1979 bp->b_data = (char *)kva + 1980 (vaddr_t)(offset - pg->offset); 1981 bp->b_resid = bp->b_bcount = iobytes; 1982 bp->b_flags = B_BUSY|B_WRITE|B_CALL; 1983 bp->b_iodone = uvm_aio_biodone1; 1984 } 1985 1986 /* XXX This is silly ... is this necessary? */ 1987 bp->b_vp = NULL; 1988 s = splbio(); 1989 bgetvp(vp, bp); 1990 splx(s); 1991 1992 bp->b_lblkno = lblkno(fs, offset); 1993 bp->b_private = mbp; 1994 if (devvp->v_type == VBLK) { 1995 bp->b_dev = devvp->v_rdev; 1996 } 1997 VOP_BWRITE(bp); 1998 while (lfs_gatherblock(sp, bp, NULL)) 1999 continue; 2000 } 2001 2002 if (skipbytes) { 2003 UVMHIST_LOG(ubchist, "skipbytes %d", skipbytes, 0,0,0); 2004 s = splbio(); 2005 if (error) { 2006 mbp->b_flags |= B_ERROR; 2007 mbp->b_error = error; 2008 } 2009 mbp->b_resid -= skipbytes; 2010 if (mbp->b_resid == 0) { 2011 biodone(mbp); 2012 } 2013 splx(s); 2014 } 2015 UVMHIST_LOG(ubchist, "returning 0", 0,0,0,0); 2016 return (0); 2017 } 2018 2019 /* 2020 * finish vnode/inode initialization. 2021 * used by lfs_vget and lfs_fastvget. 2022 */ 2023 void 2024 lfs_vinit(struct mount *mp, struct vnode *vp) 2025 { 2026 struct inode *ip = VTOI(vp); 2027 struct ufsmount *ump = VFSTOUFS(mp); 2028 int i; 2029 2030 ip->i_mode = ip->i_ffs1_mode; 2031 ip->i_ffs_effnlink = ip->i_nlink = ip->i_ffs1_nlink; 2032 ip->i_lfs_osize = ip->i_size = ip->i_ffs1_size; 2033 ip->i_flags = ip->i_ffs1_flags; 2034 ip->i_gen = ip->i_ffs1_gen; 2035 ip->i_uid = ip->i_ffs1_uid; 2036 ip->i_gid = ip->i_ffs1_gid; 2037 2038 ip->i_lfs_effnblks = ip->i_ffs1_blocks; 2039 2040 /* 2041 * Initialize the vnode from the inode, check for aliases. In all 2042 * cases re-init ip, the underlying vnode/inode may have changed. 2043 */ 2044 ufs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); 2045 2046 memset(ip->i_lfs_fragsize, 0, NDADDR * sizeof(*ip->i_lfs_fragsize)); 2047 if (vp->v_type != VLNK || 2048 VTOI(vp)->i_size >= vp->v_mount->mnt_maxsymlinklen) { 2049 struct lfs *fs = ump->um_lfs; 2050 #ifdef DEBUG 2051 for (i = (ip->i_size + fs->lfs_bsize - 1) >> fs->lfs_bshift; 2052 i < NDADDR; i++) { 2053 if (ip->i_ffs1_db[i] != 0) { 2054 inconsistent: 2055 lfs_dump_dinode(ip->i_din.ffs1_din); 2056 panic("inconsistent inode"); 2057 } 2058 } 2059 for ( ; i < NDADDR + NIADDR; i++) { 2060 if (ip->i_ffs1_ib[i - NDADDR] != 0) { 2061 goto inconsistent; 2062 } 2063 } 2064 #endif /* DEBUG */ 2065 for (i = 0; i < NDADDR; i++) 2066 if (ip->i_ffs1_db[i] != 0) 2067 ip->i_lfs_fragsize[i] = blksize(fs, ip, i); 2068 } 2069 2070 #ifdef DEBUG 2071 if (vp->v_type == VNON) { 2072 printf("lfs_vinit: ino %d is type VNON! (ifmt=%o)\n", 2073 ip->i_number, (ip->i_mode & IFMT) >> 12); 2074 lfs_dump_dinode(ip->i_din.ffs1_din); 2075 #ifdef DDB 2076 Debugger(); 2077 #endif /* DDB */ 2078 } 2079 #endif /* DEBUG */ 2080 2081 /* 2082 * Finish inode initialization now that aliasing has been resolved. 2083 */ 2084 2085 ip->i_devvp = ump->um_devvp; 2086 VREF(ip->i_devvp); 2087 genfs_node_init(vp, &lfs_genfsops); 2088 uvm_vnp_setsize(vp, ip->i_size); 2089 } 2090