ext2_vfsops.c revision 128019
1/* 2 * modified for EXT2FS support in Lites 1.1 3 * 4 * Aug 1995, Godmar Back (gback@cs.utah.edu) 5 * University of Utah, Department of Computer Science 6 */ 7/* 8 * Copyright (c) 1989, 1991, 1993, 1994 9 * The Regents of the University of California. All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94 36 * $FreeBSD: head/sys/gnu/fs/ext2fs/ext2_vfsops.c 128019 2004-04-07 20:46:16Z imp $ 37 */ 38 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/namei.h> 42#include <sys/proc.h> 43#include <sys/kernel.h> 44#include <sys/vnode.h> 45#include <sys/mount.h> 46#include <sys/bio.h> 47#include <sys/buf.h> 48#include <sys/conf.h> 49#include <sys/fcntl.h> 50#include <sys/malloc.h> 51#include <sys/stat.h> 52#include <sys/mutex.h> 53 54#include <gnu/ext2fs/ext2_mount.h> 55#include <gnu/ext2fs/inode.h> 56 57#include <gnu/ext2fs/fs.h> 58#include <gnu/ext2fs/ext2_extern.h> 59#include <gnu/ext2fs/ext2_fs.h> 60#include <gnu/ext2fs/ext2_fs_sb.h> 61 62static int ext2_flushfiles(struct mount *mp, int flags, struct thread *td); 63static int ext2_mountfs(struct vnode *, struct mount *, struct thread *); 64static int ext2_reload(struct mount *mp, struct ucred *cred, struct thread *td); 65static int ext2_sbupdate(struct ext2mount *, int); 66 67static vfs_unmount_t ext2_unmount; 68static vfs_root_t ext2_root; 69static vfs_statfs_t ext2_statfs; 70static vfs_sync_t ext2_sync; 71static vfs_vget_t ext2_vget; 72static vfs_fhtovp_t ext2_fhtovp; 73static vfs_vptofh_t ext2_vptofh; 74static vfs_init_t ext2_init; 75static vfs_uninit_t ext2_uninit; 76static vfs_nmount_t ext2_mount; 77 78MALLOC_DEFINE(M_EXT2NODE, "EXT2 node", "EXT2 vnode private part"); 79static MALLOC_DEFINE(M_EXT2MNT, "EXT2 mount", "EXT2 mount structure"); 80 81static struct vfsops ext2fs_vfsops = { 82 .vfs_fhtovp = ext2_fhtovp, 83 .vfs_init = ext2_init, 84 .vfs_nmount = ext2_mount, 85 .vfs_root = ext2_root, /* root inode via vget */ 86 .vfs_statfs = ext2_statfs, 87 .vfs_sync = ext2_sync, 88 .vfs_uninit = ext2_uninit, 89 .vfs_unmount = ext2_unmount, 90 .vfs_vget = ext2_vget, 91 .vfs_vptofh = ext2_vptofh, 92}; 93 94VFS_SET(ext2fs_vfsops, ext2fs, 0); 95#define bsd_malloc malloc 96#define bsd_free free 97 98static int ext2fs_inode_hash_lock; 99 100static int ext2_check_sb_compat(struct ext2_super_block *es, dev_t dev, 101 int ronly); 102static int compute_sb_data(struct vnode * devvp, 103 struct ext2_super_block * es, struct ext2_sb_info * fs); 104 105#ifdef notyet 106static int ext2_mountroot(void); 107 108/* 109 * Called by main() when ext2fs is going to be mounted as root. 110 * 111 * Name is updated by mount(8) after booting. 112 */ 113#define ROOTNAME "root_device" 114 115static int 116ext2_mountroot() 117{ 118 struct ext2_sb_info *fs; 119 struct mount *mp; 120 struct thread *td = curthread; 121 struct ext2mount *ump; 122 u_int size; 123 int error; 124 125 if ((error = bdevvp(rootdev, &rootvp))) { 126 printf("ext2_mountroot: can't find rootvp\n"); 127 return (error); 128 } 129 mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); 130 bzero((char *)mp, (u_long)sizeof(struct mount)); 131 TAILQ_INIT(&mp->mnt_nvnodelist); 132 mp->mnt_op = &ext2fs_vfsops; 133 mp->mnt_flag = MNT_RDONLY; 134 if (error = ext2_mountfs(rootvp, mp, td)) { 135 bsd_free(mp, M_MOUNT); 136 return (error); 137 } 138 if (error = vfs_lock(mp)) { 139 (void)ext2_unmount(mp, 0, td); 140 bsd_free(mp, M_MOUNT); 141 return (error); 142 } 143 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list); 144 mp->mnt_flag |= MNT_ROOTFS; 145 mp->mnt_vnodecovered = NULLVP; 146 ump = VFSTOEXT2(mp); 147 fs = ump->um_e2fs; 148 bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); 149 fs->fs_fsmnt[0] = '/'; 150 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, 151 MNAMELEN); 152 (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 153 &size); 154 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 155 (void)ext2_statfs(mp, &mp->mnt_stat, td); 156 vfs_unlock(mp); 157 inittodr(fs->s_es->s_wtime); /* this helps to set the time */ 158 return (0); 159} 160#endif 161 162/* 163 * VFS Operations. 164 * 165 * mount system call 166 */ 167static int 168ext2_mount(mp, ndp, td) 169 struct mount *mp; 170 struct nameidata *ndp; 171 struct thread *td; 172{ 173 struct export_args *export; 174 struct vfsoptlist *opts; 175 struct vnode *devvp; 176 struct ext2mount *ump = 0; 177 struct ext2_sb_info *fs; 178 char *path, *fspec; 179 size_t size; 180 int error, flags, len; 181 mode_t accessmode; 182 183 opts = mp->mnt_optnew; 184 185 vfs_getopt(opts, "fspath", (void **)&path, NULL); 186 /* Double-check the length of path.. */ 187 if (strlen(path) >= MAXMNTLEN - 1) 188 return (ENAMETOOLONG); 189 190 fspec = NULL; 191 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 192 if (!error && fspec[len - 1] != '\0') 193 return (EINVAL); 194 195 /* 196 * If updating, check whether changing from read-only to 197 * read/write; if there is no device name, that's all we do. 198 */ 199 if (mp->mnt_flag & MNT_UPDATE) { 200 ump = VFSTOEXT2(mp); 201 fs = ump->um_e2fs; 202 error = 0; 203 if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) { 204 flags = WRITECLOSE; 205 if (mp->mnt_flag & MNT_FORCE) 206 flags |= FORCECLOSE; 207 if (vfs_busy(mp, LK_NOWAIT, 0, td)) 208 return (EBUSY); 209 error = ext2_flushfiles(mp, flags, td); 210 vfs_unbusy(mp, td); 211 if (!error && fs->s_wasvalid) { 212 fs->s_es->s_state |= EXT2_VALID_FS; 213 ext2_sbupdate(ump, MNT_WAIT); 214 } 215 fs->s_rd_only = 1; 216 } 217 if (!error && (mp->mnt_flag & MNT_RELOAD)) 218 error = ext2_reload(mp, ndp->ni_cnd.cn_cred, td); 219 if (error) 220 return (error); 221 devvp = ump->um_devvp; 222 if (ext2_check_sb_compat(fs->s_es, devvp->v_rdev, 223 (mp->mnt_kern_flag & MNTK_WANTRDWR) == 0) != 0) 224 return (EPERM); 225 if (fs->s_rd_only && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 226 /* 227 * If upgrade to read-write by non-root, then verify 228 * that user has necessary permissions on the device. 229 */ 230 if (suser(td)) { 231 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 232 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 233 td->td_ucred, td)) != 0) { 234 VOP_UNLOCK(devvp, 0, td); 235 return (error); 236 } 237 VOP_UNLOCK(devvp, 0, td); 238 } 239 240 if ((fs->s_es->s_state & EXT2_VALID_FS) == 0 || 241 (fs->s_es->s_state & EXT2_ERROR_FS)) { 242 if (mp->mnt_flag & MNT_FORCE) { 243 printf( 244"WARNING: %s was not properly dismounted\n", 245 fs->fs_fsmnt); 246 } else { 247 printf( 248"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 249 fs->fs_fsmnt); 250 return (EPERM); 251 } 252 } 253 fs->s_es->s_state &= ~EXT2_VALID_FS; 254 ext2_sbupdate(ump, MNT_WAIT); 255 fs->s_rd_only = 0; 256 } 257 if (fspec == NULL) { 258 error = vfs_getopt(opts, "export", (void **)&export, 259 &len); 260 if (error || len != sizeof(struct export_args)) 261 return (EINVAL); 262 /* Process export requests. */ 263 return (vfs_export(mp, export)); 264 } 265 } 266 /* 267 * Not an update, or updating the name: look up the name 268 * and verify that it refers to a sensible disk device. 269 */ 270 if (fspec == NULL) 271 return (EINVAL); 272 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 273 if ((error = namei(ndp)) != 0) 274 return (error); 275 NDFREE(ndp, NDF_ONLY_PNBUF); 276 devvp = ndp->ni_vp; 277 278 if (!vn_isdisk(devvp, &error)) { 279 vrele(devvp); 280 return (error); 281 } 282 283 /* 284 * If mount by non-root, then verify that user has necessary 285 * permissions on the device. 286 */ 287 if (suser(td)) { 288 accessmode = VREAD; 289 if ((mp->mnt_flag & MNT_RDONLY) == 0) 290 accessmode |= VWRITE; 291 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 292 if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td)) != 0) { 293 vput(devvp); 294 return (error); 295 } 296 VOP_UNLOCK(devvp, 0, td); 297 } 298 299 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 300 error = ext2_mountfs(devvp, mp, td); 301 } else { 302 if (devvp != ump->um_devvp) 303 error = EINVAL; /* needs translation */ 304 else 305 vrele(devvp); 306 } 307 if (error) { 308 vrele(devvp); 309 return (error); 310 } 311 ump = VFSTOEXT2(mp); 312 fs = ump->um_e2fs; 313 /* 314 * Note that this strncpy() is ok because of a check at the start 315 * of ext2_mount(). 316 */ 317 strncpy(fs->fs_fsmnt, path, MAXMNTLEN); 318 fs->fs_fsmnt[MAXMNTLEN - 1] = '\0'; 319 (void)copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 320 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 321 (void)ext2_statfs(mp, &mp->mnt_stat, td); 322 return (0); 323} 324 325/* 326 * checks that the data in the descriptor blocks make sense 327 * this is taken from ext2/super.c 328 */ 329static int ext2_check_descriptors (struct ext2_sb_info * sb) 330{ 331 int i; 332 int desc_block = 0; 333 unsigned long block = sb->s_es->s_first_data_block; 334 struct ext2_group_desc * gdp = NULL; 335 336 /* ext2_debug ("Checking group descriptors"); */ 337 338 for (i = 0; i < sb->s_groups_count; i++) 339 { 340 /* examine next descriptor block */ 341 if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0) 342 gdp = (struct ext2_group_desc *) 343 sb->s_group_desc[desc_block++]->b_data; 344 if (gdp->bg_block_bitmap < block || 345 gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 346 { 347 printf ("ext2_check_descriptors: " 348 "Block bitmap for group %d" 349 " not in group (block %lu)!\n", 350 i, (unsigned long) gdp->bg_block_bitmap); 351 return 0; 352 } 353 if (gdp->bg_inode_bitmap < block || 354 gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 355 { 356 printf ("ext2_check_descriptors: " 357 "Inode bitmap for group %d" 358 " not in group (block %lu)!\n", 359 i, (unsigned long) gdp->bg_inode_bitmap); 360 return 0; 361 } 362 if (gdp->bg_inode_table < block || 363 gdp->bg_inode_table + sb->s_itb_per_group >= 364 block + EXT2_BLOCKS_PER_GROUP(sb)) 365 { 366 printf ("ext2_check_descriptors: " 367 "Inode table for group %d" 368 " not in group (block %lu)!\n", 369 i, (unsigned long) gdp->bg_inode_table); 370 return 0; 371 } 372 block += EXT2_BLOCKS_PER_GROUP(sb); 373 gdp++; 374 } 375 return 1; 376} 377 378static int 379ext2_check_sb_compat(es, dev, ronly) 380 struct ext2_super_block *es; 381 dev_t dev; 382 int ronly; 383{ 384 385 if (es->s_magic != EXT2_SUPER_MAGIC) { 386 printf("ext2fs: %s: wrong magic number %#x (expected %#x)\n", 387 devtoname(dev), es->s_magic, EXT2_SUPER_MAGIC); 388 return (1); 389 } 390 if (es->s_rev_level > EXT2_GOOD_OLD_REV) { 391 if (es->s_feature_incompat & ~EXT2_FEATURE_INCOMPAT_SUPP) { 392 printf( 393"WARNING: mount of %s denied due to unsupported optional features\n", 394 devtoname(dev)); 395 return (1); 396 } 397 if (!ronly && 398 (es->s_feature_ro_compat & ~EXT2_FEATURE_RO_COMPAT_SUPP)) { 399 printf( 400"WARNING: R/W mount of %s denied due to unsupported optional features\n", 401 devtoname(dev)); 402 return (1); 403 } 404 } 405 return (0); 406} 407 408/* 409 * this computes the fields of the ext2_sb_info structure from the 410 * data in the ext2_super_block structure read in 411 */ 412static int compute_sb_data(devvp, es, fs) 413 struct vnode * devvp; 414 struct ext2_super_block * es; 415 struct ext2_sb_info * fs; 416{ 417 int db_count, error; 418 int i, j; 419 int logic_sb_block = 1; /* XXX for now */ 420 421#if 1 422#define V(v) 423#else 424#define V(v) printf(#v"= %d\n", fs->v); 425#endif 426 427 fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size; 428 V(s_blocksize) 429 fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size; 430 V(s_bshift) 431 fs->s_fsbtodb = es->s_log_block_size + 1; 432 V(s_fsbtodb) 433 fs->s_qbmask = fs->s_blocksize - 1; 434 V(s_bmask) 435 fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es); 436 V(s_blocksize_bits) 437 fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size; 438 V(s_frag_size) 439 if (fs->s_frag_size) 440 fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size; 441 V(s_frags_per_block) 442 fs->s_blocks_per_group = es->s_blocks_per_group; 443 V(s_blocks_per_group) 444 fs->s_frags_per_group = es->s_frags_per_group; 445 V(s_frags_per_group) 446 fs->s_inodes_per_group = es->s_inodes_per_group; 447 V(s_inodes_per_group) 448 fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE; 449 V(s_inodes_per_block) 450 fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block; 451 V(s_itb_per_group) 452 fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc); 453 V(s_desc_per_block) 454 /* s_resuid / s_resgid ? */ 455 fs->s_groups_count = (es->s_blocks_count - 456 es->s_first_data_block + 457 EXT2_BLOCKS_PER_GROUP(fs) - 1) / 458 EXT2_BLOCKS_PER_GROUP(fs); 459 V(s_groups_count) 460 db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) / 461 EXT2_DESC_PER_BLOCK(fs); 462 fs->s_db_per_group = db_count; 463 V(s_db_per_group) 464 465 fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *), 466 M_EXT2MNT, M_WAITOK); 467 468 /* adjust logic_sb_block */ 469 if(fs->s_blocksize > SBSIZE) 470 /* Godmar thinks: if the blocksize is greater than 1024, then 471 the superblock is logically part of block zero. 472 */ 473 logic_sb_block = 0; 474 475 for (i = 0; i < db_count; i++) { 476 error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1), 477 fs->s_blocksize, NOCRED, &fs->s_group_desc[i]); 478 if(error) { 479 for (j = 0; j < i; j++) 480 brelse(fs->s_group_desc[j]); 481 bsd_free(fs->s_group_desc, M_EXT2MNT); 482 printf("EXT2-fs: unable to read group descriptors (%d)\n", error); 483 return EIO; 484 } 485 LCK_BUF(fs->s_group_desc[i]) 486 } 487 if(!ext2_check_descriptors(fs)) { 488 for (j = 0; j < db_count; j++) 489 ULCK_BUF(fs->s_group_desc[j]) 490 bsd_free(fs->s_group_desc, M_EXT2MNT); 491 printf("EXT2-fs: (ext2_check_descriptors failure) " 492 "unable to read group descriptors\n"); 493 return EIO; 494 } 495 496 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) { 497 fs->s_inode_bitmap_number[i] = 0; 498 fs->s_inode_bitmap[i] = NULL; 499 fs->s_block_bitmap_number[i] = 0; 500 fs->s_block_bitmap[i] = NULL; 501 } 502 fs->s_loaded_inode_bitmaps = 0; 503 fs->s_loaded_block_bitmaps = 0; 504 if (es->s_rev_level == EXT2_GOOD_OLD_REV || (es->s_feature_ro_compat & 505 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) == 0) 506 fs->fs_maxfilesize = 0x7fffffff; 507 else 508 fs->fs_maxfilesize = 0x7fffffffffffffff; 509 return 0; 510} 511 512/* 513 * Reload all incore data for a filesystem (used after running fsck on 514 * the root filesystem and finding things to fix). The filesystem must 515 * be mounted read-only. 516 * 517 * Things to do to update the mount: 518 * 1) invalidate all cached meta-data. 519 * 2) re-read superblock from disk. 520 * 3) re-read summary information from disk. 521 * 4) invalidate all inactive vnodes. 522 * 5) invalidate all cached file data. 523 * 6) re-read inode data for all active vnodes. 524 */ 525static int 526ext2_reload(mp, cred, td) 527 struct mount *mp; 528 struct ucred *cred; 529 struct thread *td; 530{ 531 struct vnode *vp, *nvp, *devvp; 532 struct inode *ip; 533 struct buf *bp; 534 struct ext2_super_block * es; 535 struct ext2_sb_info *fs; 536 int error; 537 538 if ((mp->mnt_flag & MNT_RDONLY) == 0) 539 return (EINVAL); 540 /* 541 * Step 1: invalidate all cached meta-data. 542 */ 543 devvp = VFSTOEXT2(mp)->um_devvp; 544 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 545 if (vinvalbuf(devvp, 0, cred, td, 0, 0) != 0) 546 panic("ext2_reload: dirty1"); 547 VOP_UNLOCK(devvp, 0, td); 548 549 /* 550 * Step 2: re-read superblock from disk. 551 * constants have been adjusted for ext2 552 */ 553 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0) 554 return (error); 555 es = (struct ext2_super_block *)bp->b_data; 556 if (ext2_check_sb_compat(es, devvp->v_rdev, 0) != 0) { 557 brelse(bp); 558 return (EIO); /* XXX needs translation */ 559 } 560 fs = VFSTOEXT2(mp)->um_e2fs; 561 bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block)); 562 563 if((error = compute_sb_data(devvp, es, fs)) != 0) { 564 brelse(bp); 565 return error; 566 } 567#ifdef UNKLAR 568 if (fs->fs_sbsize < SBSIZE) 569 bp->b_flags |= B_INVAL; 570#endif 571 brelse(bp); 572 573loop: 574 MNT_ILOCK(mp); 575 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 576 if (vp->v_mount != mp) { 577 MNT_IUNLOCK(mp); 578 goto loop; 579 } 580 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 581 VI_LOCK(vp); 582 if (vp->v_iflag & VI_XLOCK) { 583 VI_UNLOCK(vp); 584 continue; 585 } 586 MNT_IUNLOCK(mp); 587 /* 588 * Step 4: invalidate all inactive vnodes. 589 */ 590 if (vp->v_usecount == 0) { 591 vgonel(vp, td); 592 goto loop; 593 } 594 /* 595 * Step 5: invalidate all cached file data. 596 */ 597 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 598 goto loop; 599 } 600 if (vinvalbuf(vp, 0, cred, td, 0, 0)) 601 panic("ext2_reload: dirty2"); 602 /* 603 * Step 6: re-read inode data for all active vnodes. 604 */ 605 ip = VTOI(vp); 606 error = 607 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 608 (int)fs->s_blocksize, NOCRED, &bp); 609 if (error) { 610 VOP_UNLOCK(vp, 0, td); 611 vrele(vp); 612 return (error); 613 } 614 ext2_ei2i((struct ext2_inode *) ((char *)bp->b_data + 615 EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)), ip); 616 brelse(bp); 617 VOP_UNLOCK(vp, 0, td); 618 vrele(vp); 619 MNT_ILOCK(mp); 620 } 621 MNT_IUNLOCK(mp); 622 return (0); 623} 624 625/* 626 * Common code for mount and mountroot 627 */ 628static int 629ext2_mountfs(devvp, mp, td) 630 struct vnode *devvp; 631 struct mount *mp; 632 struct thread *td; 633{ 634 struct ext2mount *ump; 635 struct buf *bp; 636 struct ext2_sb_info *fs; 637 struct ext2_super_block * es; 638 dev_t dev = devvp->v_rdev; 639 int error; 640 int ronly; 641 642 /* 643 * Disallow multiple mounts of the same device. 644 * Disallow mounting of a device that is currently in use 645 * (except for root, which might share swap device for miniroot). 646 * Flush out any old buffers remaining from a previous use. 647 */ 648 if ((error = vfs_mountedon(devvp)) != 0) 649 return (error); 650 if (vcount(devvp) > 1 && devvp != rootvp) 651 return (EBUSY); 652 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 653 error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0); 654 if (error) { 655 VOP_UNLOCK(devvp, 0, td); 656 return (error); 657 } 658 659 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 660 /* 661 * XXX: open the device with read and write access even if only 662 * read access is needed now. Write access is needed if the 663 * filesystem is ever mounted read/write, and we don't change the 664 * access mode for remounts. 665 */ 666#ifdef notyet 667 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD | FWRITE, FSCRED, td, -1); 668#else 669 error = VOP_OPEN(devvp, FREAD | FWRITE, FSCRED, td, -1); 670#endif 671 VOP_UNLOCK(devvp, 0, td); 672 if (error) 673 return (error); 674 if (devvp->v_rdev->si_iosize_max != 0) 675 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 676 if (mp->mnt_iosize_max > MAXPHYS) 677 mp->mnt_iosize_max = MAXPHYS; 678 679 bp = NULL; 680 ump = NULL; 681 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0) 682 goto out; 683 es = (struct ext2_super_block *)bp->b_data; 684 if (ext2_check_sb_compat(es, dev, ronly) != 0) { 685 error = EINVAL; /* XXX needs translation */ 686 goto out; 687 } 688 if ((es->s_state & EXT2_VALID_FS) == 0 || 689 (es->s_state & EXT2_ERROR_FS)) { 690 if (ronly || (mp->mnt_flag & MNT_FORCE)) { 691 printf( 692"WARNING: Filesystem was not properly dismounted\n"); 693 } else { 694 printf( 695"WARNING: R/W mount denied. Filesystem is not clean - run fsck\n"); 696 error = EPERM; 697 goto out; 698 } 699 } 700 ump = bsd_malloc(sizeof *ump, M_EXT2MNT, M_WAITOK); 701 bzero((caddr_t)ump, sizeof *ump); 702 /* I don't know whether this is the right strategy. Note that 703 we dynamically allocate both an ext2_sb_info and an ext2_super_block 704 while Linux keeps the super block in a locked buffer 705 */ 706 ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info), 707 M_EXT2MNT, M_WAITOK); 708 ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block), 709 M_EXT2MNT, M_WAITOK); 710 bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block)); 711 if ((error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs))) 712 goto out; 713 /* 714 * We don't free the group descriptors allocated by compute_sb_data() 715 * until ext2_unmount(). This is OK since the mount will succeed. 716 */ 717 brelse(bp); 718 bp = NULL; 719 fs = ump->um_e2fs; 720 fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */ 721 /* if the fs is not mounted read-only, make sure the super block is 722 always written back on a sync() 723 */ 724 fs->s_wasvalid = fs->s_es->s_state & EXT2_VALID_FS ? 1 : 0; 725 if (ronly == 0) { 726 fs->s_dirt = 1; /* mark it modified */ 727 fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */ 728 } 729 mp->mnt_data = (qaddr_t)ump; 730 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 731 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 732 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN; 733 mp->mnt_flag |= MNT_LOCAL; 734 ump->um_mountp = mp; 735 ump->um_dev = dev; 736 ump->um_devvp = devvp; 737 /* setting those two parameters allowed us to use 738 ufs_bmap w/o changse ! 739 */ 740 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs); 741 ump->um_bptrtodb = fs->s_es->s_log_block_size + 1; 742 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs); 743 devvp->v_rdev->si_mountpoint = mp; 744 if (ronly == 0) 745 ext2_sbupdate(ump, MNT_WAIT); 746 return (0); 747out: 748 if (bp) 749 brelse(bp); 750 /* XXX: see comment above VOP_OPEN. */ 751#ifdef notyet 752 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE, NOCRED, td); 753#else 754 (void)VOP_CLOSE(devvp, FREAD | FWRITE, NOCRED, td); 755#endif 756 if (ump) { 757 bsd_free(ump->um_e2fs->s_es, M_EXT2MNT); 758 bsd_free(ump->um_e2fs, M_EXT2MNT); 759 bsd_free(ump, M_EXT2MNT); 760 mp->mnt_data = (qaddr_t)0; 761 } 762 return (error); 763} 764 765/* 766 * unmount system call 767 */ 768static int 769ext2_unmount(mp, mntflags, td) 770 struct mount *mp; 771 int mntflags; 772 struct thread *td; 773{ 774 struct ext2mount *ump; 775 struct ext2_sb_info *fs; 776 int error, flags, ronly, i; 777 778 flags = 0; 779 if (mntflags & MNT_FORCE) { 780 if (mp->mnt_flag & MNT_ROOTFS) 781 return (EINVAL); 782 flags |= FORCECLOSE; 783 } 784 if ((error = ext2_flushfiles(mp, flags, td)) != 0) 785 return (error); 786 ump = VFSTOEXT2(mp); 787 fs = ump->um_e2fs; 788 ronly = fs->s_rd_only; 789 if (ronly == 0) { 790 if (fs->s_wasvalid) 791 fs->s_es->s_state |= EXT2_VALID_FS; 792 ext2_sbupdate(ump, MNT_WAIT); 793 } 794 795 /* release buffers containing group descriptors */ 796 for(i = 0; i < fs->s_db_per_group; i++) 797 ULCK_BUF(fs->s_group_desc[i]) 798 bsd_free(fs->s_group_desc, M_EXT2MNT); 799 800 /* release cached inode/block bitmaps */ 801 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 802 if (fs->s_inode_bitmap[i]) 803 ULCK_BUF(fs->s_inode_bitmap[i]) 804 805 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 806 if (fs->s_block_bitmap[i]) 807 ULCK_BUF(fs->s_block_bitmap[i]) 808 809 ump->um_devvp->v_rdev->si_mountpoint = NULL; 810 /* XXX: see comment above VOP_OPEN. */ 811#ifdef notyet 812 error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD | FWRITE, 813 NOCRED, td); 814#else 815 error = VOP_CLOSE(ump->um_devvp, FREAD | FWRITE, NOCRED, td); 816#endif 817 vrele(ump->um_devvp); 818 bsd_free(fs->s_es, M_EXT2MNT); 819 bsd_free(fs, M_EXT2MNT); 820 bsd_free(ump, M_EXT2MNT); 821 mp->mnt_data = (qaddr_t)0; 822 mp->mnt_flag &= ~MNT_LOCAL; 823 return (error); 824} 825 826/* 827 * Flush out all the files in a filesystem. 828 */ 829static int 830ext2_flushfiles(mp, flags, td) 831 struct mount *mp; 832 int flags; 833 struct thread *td; 834{ 835 int error; 836 837 error = vflush(mp, 0, flags); 838 return (error); 839} 840 841/* 842 * Get file system statistics. 843 * taken from ext2/super.c ext2_statfs 844 */ 845static int 846ext2_statfs(mp, sbp, td) 847 struct mount *mp; 848 struct statfs *sbp; 849 struct thread *td; 850{ 851 unsigned long overhead; 852 struct ext2mount *ump; 853 struct ext2_sb_info *fs; 854 struct ext2_super_block *es; 855 int i, nsb; 856 857 ump = VFSTOEXT2(mp); 858 fs = ump->um_e2fs; 859 es = fs->s_es; 860 861 if (es->s_magic != EXT2_SUPER_MAGIC) 862 panic("ext2_statfs - magic number spoiled"); 863 864 /* 865 * Compute the overhead (FS structures) 866 */ 867 if (es->s_feature_ro_compat & EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) { 868 nsb = 0; 869 for (i = 0 ; i < fs->s_groups_count; i++) 870 if (ext2_group_sparse(i)) 871 nsb++; 872 } else 873 nsb = fs->s_groups_count; 874 overhead = es->s_first_data_block + 875 /* Superblocks and block group descriptors: */ 876 nsb * (1 + fs->s_db_per_group) + 877 /* Inode bitmap, block bitmap, and inode table: */ 878 fs->s_groups_count * (1 + 1 + fs->s_itb_per_group); 879 880 sbp->f_bsize = EXT2_FRAG_SIZE(fs); 881 sbp->f_iosize = EXT2_BLOCK_SIZE(fs); 882 sbp->f_blocks = es->s_blocks_count - overhead; 883 sbp->f_bfree = es->s_free_blocks_count; 884 sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count; 885 sbp->f_files = es->s_inodes_count; 886 sbp->f_ffree = es->s_free_inodes_count; 887 if (sbp != &mp->mnt_stat) { 888 sbp->f_type = mp->mnt_vfc->vfc_typenum; 889 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 890 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 891 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 892 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 893 } 894 return (0); 895} 896 897/* 898 * Go through the disk queues to initiate sandbagged IO; 899 * go through the inodes to write those that have been modified; 900 * initiate the writing of the super block if it has been modified. 901 * 902 * Note: we are always called with the filesystem marked `MPBUSY'. 903 */ 904static int 905ext2_sync(mp, waitfor, cred, td) 906 struct mount *mp; 907 int waitfor; 908 struct ucred *cred; 909 struct thread *td; 910{ 911 struct vnode *nvp, *vp; 912 struct inode *ip; 913 struct ext2mount *ump = VFSTOEXT2(mp); 914 struct ext2_sb_info *fs; 915 int error, allerror = 0; 916 917 fs = ump->um_e2fs; 918 if (fs->s_dirt != 0 && fs->s_rd_only != 0) { /* XXX */ 919 printf("fs = %s\n", fs->fs_fsmnt); 920 panic("ext2_sync: rofs mod"); 921 } 922 /* 923 * Write back each (modified) inode. 924 */ 925 MNT_ILOCK(mp); 926loop: 927 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 928 /* 929 * If the vnode that we are about to sync is no longer 930 * associated with this mount point, start over. 931 */ 932 if (vp->v_mount != mp) 933 goto loop; 934 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 935 VI_LOCK(vp); 936 if (vp->v_iflag & VI_XLOCK) { 937 VI_UNLOCK(vp); 938 continue; 939 } 940 MNT_IUNLOCK(mp); 941 ip = VTOI(vp); 942 if (vp->v_type == VNON || 943 ((ip->i_flag & 944 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 945 (TAILQ_EMPTY(&vp->v_dirtyblkhd) || waitfor == MNT_LAZY))) { 946 VI_UNLOCK(vp); 947 MNT_ILOCK(mp); 948 continue; 949 } 950 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, td); 951 if (error) { 952 MNT_ILOCK(mp); 953 if (error == ENOENT) 954 goto loop; 955 continue; 956 } 957 if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0) 958 allerror = error; 959 VOP_UNLOCK(vp, 0, td); 960 vrele(vp); 961 MNT_ILOCK(mp); 962 } 963 MNT_IUNLOCK(mp); 964 /* 965 * Force stale file system control information to be flushed. 966 */ 967 if (waitfor != MNT_LAZY) { 968 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 969 if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor, td)) != 0) 970 allerror = error; 971 VOP_UNLOCK(ump->um_devvp, 0, td); 972 } 973 /* 974 * Write back modified superblock. 975 */ 976 if (fs->s_dirt != 0) { 977 fs->s_dirt = 0; 978 fs->s_es->s_wtime = time_second; 979 if ((error = ext2_sbupdate(ump, waitfor)) != 0) 980 allerror = error; 981 } 982 return (allerror); 983} 984 985/* 986 * Look up an EXT2FS dinode number to find its incore vnode, otherwise read it 987 * in from disk. If it is in core, wait for the lock bit to clear, then 988 * return the inode locked. Detection and handling of mount points must be 989 * done by the calling routine. 990 */ 991static int 992ext2_vget(mp, ino, flags, vpp) 993 struct mount *mp; 994 ino_t ino; 995 int flags; 996 struct vnode **vpp; 997{ 998 struct ext2_sb_info *fs; 999 struct inode *ip; 1000 struct ext2mount *ump; 1001 struct buf *bp; 1002 struct vnode *vp; 1003 dev_t dev; 1004 int i, error; 1005 int used_blocks; 1006 1007 ump = VFSTOEXT2(mp); 1008 dev = ump->um_dev; 1009restart: 1010 if ((error = ext2_ihashget(dev, ino, flags, vpp)) != 0) 1011 return (error); 1012 if (*vpp != NULL) 1013 return (0); 1014 1015 /* 1016 * Lock out the creation of new entries in the FFS hash table in 1017 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 1018 * may occur! 1019 */ 1020 if (ext2fs_inode_hash_lock) { 1021 while (ext2fs_inode_hash_lock) { 1022 ext2fs_inode_hash_lock = -1; 1023 tsleep(&ext2fs_inode_hash_lock, PVM, "e2vget", 0); 1024 } 1025 goto restart; 1026 } 1027 ext2fs_inode_hash_lock = 1; 1028 1029 /* 1030 * If this MALLOC() is performed after the getnewvnode() 1031 * it might block, leaving a vnode with a NULL v_data to be 1032 * found by ext2_sync() if a sync happens to fire right then, 1033 * which will cause a panic because ext2_sync() blindly 1034 * dereferences vp->v_data (as well it should). 1035 */ 1036 MALLOC(ip, struct inode *, sizeof(struct inode), M_EXT2NODE, M_WAITOK); 1037 1038 /* Allocate a new vnode/inode. */ 1039 if ((error = getnewvnode("ext2fs", mp, ext2_vnodeop_p, &vp)) != 0) { 1040 if (ext2fs_inode_hash_lock < 0) 1041 wakeup(&ext2fs_inode_hash_lock); 1042 ext2fs_inode_hash_lock = 0; 1043 *vpp = NULL; 1044 FREE(ip, M_EXT2NODE); 1045 return (error); 1046 } 1047 bzero((caddr_t)ip, sizeof(struct inode)); 1048 vp->v_data = ip; 1049 ip->i_vnode = vp; 1050 ip->i_e2fs = fs = ump->um_e2fs; 1051 ip->i_dev = dev; 1052 ip->i_number = ino; 1053 /* 1054 * Put it onto its hash chain and lock it so that other requests for 1055 * this inode will block if they arrive while we are sleeping waiting 1056 * for old data structures to be purged or for the contents of the 1057 * disk portion of this inode to be read. 1058 */ 1059 ext2_ihashins(ip); 1060 1061 if (ext2fs_inode_hash_lock < 0) 1062 wakeup(&ext2fs_inode_hash_lock); 1063 ext2fs_inode_hash_lock = 0; 1064 1065 /* Read in the disk contents for the inode, copy into the inode. */ 1066#if 0 1067printf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino))); 1068#endif 1069 if ((error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1070 (int)fs->s_blocksize, NOCRED, &bp)) != 0) { 1071 /* 1072 * The inode does not contain anything useful, so it would 1073 * be misleading to leave it on its hash chain. With mode 1074 * still zero, it will be unlinked and returned to the free 1075 * list by vput(). 1076 */ 1077 vput(vp); 1078 brelse(bp); 1079 *vpp = NULL; 1080 return (error); 1081 } 1082 /* convert ext2 inode to dinode */ 1083 ext2_ei2i((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE * 1084 ino_to_fsbo(fs, ino)), ip); 1085 ip->i_block_group = ino_to_cg(fs, ino); 1086 ip->i_next_alloc_block = 0; 1087 ip->i_next_alloc_goal = 0; 1088 ip->i_prealloc_count = 0; 1089 ip->i_prealloc_block = 0; 1090 /* now we want to make sure that block pointers for unused 1091 blocks are zeroed out - ext2_balloc depends on this 1092 although for regular files and directories only 1093 */ 1094 if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) { 1095 used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize; 1096 for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++) 1097 ip->i_db[i] = 0; 1098 } 1099/* 1100 ext2_print_inode(ip); 1101*/ 1102 brelse(bp); 1103 1104 /* 1105 * Initialize the vnode from the inode, check for aliases. 1106 * Note that the underlying vnode may have changed. 1107 */ 1108 if ((error = ext2_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) != 0) { 1109 vput(vp); 1110 *vpp = NULL; 1111 return (error); 1112 } 1113 /* 1114 * Finish inode initialization now that aliasing has been resolved. 1115 */ 1116 ip->i_devvp = ump->um_devvp; 1117 VREF(ip->i_devvp); 1118 /* 1119 * Set up a generation number for this inode if it does not 1120 * already have one. This should only happen on old filesystems. 1121 */ 1122 if (ip->i_gen == 0) { 1123 ip->i_gen = random() / 2 + 1; 1124 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1125 ip->i_flag |= IN_MODIFIED; 1126 } 1127 *vpp = vp; 1128 return (0); 1129} 1130 1131/* 1132 * File handle to vnode 1133 * 1134 * Have to be really careful about stale file handles: 1135 * - check that the inode number is valid 1136 * - call ext2_vget() to get the locked inode 1137 * - check for an unallocated inode (i_mode == 0) 1138 * - check that the given client host has export rights and return 1139 * those rights via. exflagsp and credanonp 1140 */ 1141static int 1142ext2_fhtovp(mp, fhp, vpp) 1143 struct mount *mp; 1144 struct fid *fhp; 1145 struct vnode **vpp; 1146{ 1147 struct inode *ip; 1148 struct ufid *ufhp; 1149 struct vnode *nvp; 1150 struct ext2_sb_info *fs; 1151 int error; 1152 1153 ufhp = (struct ufid *)fhp; 1154 fs = VFSTOEXT2(mp)->um_e2fs; 1155 if (ufhp->ufid_ino < ROOTINO || 1156 ufhp->ufid_ino > fs->s_groups_count * fs->s_es->s_inodes_per_group) 1157 return (ESTALE); 1158 1159 error = VFS_VGET(mp, ufhp->ufid_ino, LK_EXCLUSIVE, &nvp); 1160 if (error) { 1161 *vpp = NULLVP; 1162 return (error); 1163 } 1164 ip = VTOI(nvp); 1165 if (ip->i_mode == 0 || 1166 ip->i_gen != ufhp->ufid_gen || ip->i_nlink <= 0) { 1167 vput(nvp); 1168 *vpp = NULLVP; 1169 return (ESTALE); 1170 } 1171 *vpp = nvp; 1172 return (0); 1173} 1174 1175/* 1176 * Vnode pointer to File handle 1177 */ 1178/* ARGSUSED */ 1179static int 1180ext2_vptofh(vp, fhp) 1181 struct vnode *vp; 1182 struct fid *fhp; 1183{ 1184 struct inode *ip; 1185 struct ufid *ufhp; 1186 1187 ip = VTOI(vp); 1188 ufhp = (struct ufid *)fhp; 1189 ufhp->ufid_len = sizeof(struct ufid); 1190 ufhp->ufid_ino = ip->i_number; 1191 ufhp->ufid_gen = ip->i_gen; 1192 return (0); 1193} 1194 1195/* 1196 * Write a superblock and associated information back to disk. 1197 */ 1198static int 1199ext2_sbupdate(mp, waitfor) 1200 struct ext2mount *mp; 1201 int waitfor; 1202{ 1203 struct ext2_sb_info *fs = mp->um_e2fs; 1204 struct ext2_super_block *es = fs->s_es; 1205 struct buf *bp; 1206 int error = 0; 1207/* 1208printf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no"); 1209*/ 1210 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0, 0); 1211 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block)); 1212 if (waitfor == MNT_WAIT) 1213 error = bwrite(bp); 1214 else 1215 bawrite(bp); 1216 1217 /* 1218 * The buffers for group descriptors, inode bitmaps and block bitmaps 1219 * are not busy at this point and are (hopefully) written by the 1220 * usual sync mechanism. No need to write them here 1221 */ 1222 1223 return (error); 1224} 1225 1226/* 1227 * Return the root of a filesystem. 1228 */ 1229static int 1230ext2_root(mp, vpp) 1231 struct mount *mp; 1232 struct vnode **vpp; 1233{ 1234 struct vnode *nvp; 1235 int error; 1236 1237 error = VFS_VGET(mp, (ino_t)ROOTINO, LK_EXCLUSIVE, &nvp); 1238 if (error) 1239 return (error); 1240 *vpp = nvp; 1241 return (0); 1242} 1243 1244static int 1245ext2_init(struct vfsconf *vfsp) 1246{ 1247 1248 ext2_ihashinit(); 1249 return (0); 1250} 1251 1252static int 1253ext2_uninit(struct vfsconf *vfsp) 1254{ 1255 1256 ext2_ihashuninit(); 1257 return (0); 1258} 1259