ffs_vfsops.c revision 141526
1/*- 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: head/sys/ufs/ffs/ffs_vfsops.c 141526 2005-02-08 17:40:01Z phk $"); 34 35#include "opt_mac.h" 36#include "opt_quota.h" 37#include "opt_ufs.h" 38#include "opt_ffs.h" 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/namei.h> 43#include <sys/proc.h> 44#include <sys/kernel.h> 45#include <sys/mac.h> 46#include <sys/vnode.h> 47#include <sys/mount.h> 48#include <sys/bio.h> 49#include <sys/buf.h> 50#include <sys/conf.h> 51#include <sys/fcntl.h> 52#include <sys/malloc.h> 53#include <sys/mutex.h> 54 55#include <ufs/ufs/extattr.h> 56#include <ufs/ufs/quota.h> 57#include <ufs/ufs/ufsmount.h> 58#include <ufs/ufs/inode.h> 59#include <ufs/ufs/ufs_extern.h> 60 61#include <ufs/ffs/fs.h> 62#include <ufs/ffs/ffs_extern.h> 63 64#include <vm/vm.h> 65#include <vm/uma.h> 66#include <vm/vm_page.h> 67 68#include <geom/geom.h> 69#include <geom/geom_vfs.h> 70 71uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 72 73static int ffs_sbupdate(struct ufsmount *, int); 74static int ffs_reload(struct mount *, struct thread *); 75static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 76static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 77 ufs2_daddr_t); 78static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 79static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 80static vfs_init_t ffs_init; 81static vfs_uninit_t ffs_uninit; 82static vfs_extattrctl_t ffs_extattrctl; 83static vfs_cmount_t ffs_cmount; 84static vfs_mount_t ffs_mount; 85 86static struct vfsops ufs_vfsops = { 87 .vfs_extattrctl = ffs_extattrctl, 88 .vfs_fhtovp = ffs_fhtovp, 89 .vfs_init = ffs_init, 90 .vfs_mount = ffs_mount, 91 .vfs_cmount = ffs_cmount, 92 .vfs_quotactl = ufs_quotactl, 93 .vfs_root = ufs_root, 94 .vfs_statfs = ffs_statfs, 95 .vfs_sync = ffs_sync, 96 .vfs_uninit = ffs_uninit, 97 .vfs_unmount = ffs_unmount, 98 .vfs_vget = ffs_vget, 99 .vfs_vptofh = ffs_vptofh, 100}; 101 102VFS_SET(ufs_vfsops, ufs, 0); 103 104static b_strategy_t ffs_geom_strategy; 105 106static struct buf_ops ffs_ops = { 107 .bop_name = "FFS", 108 .bop_write = bufwrite, 109 .bop_strategy = ffs_geom_strategy, 110 .bop_sync = bufsync, 111}; 112 113static const char *ffs_opts[] = { "from", "export", NULL }; 114 115static int 116ffs_mount(struct mount *mp, struct thread *td) 117{ 118 struct vnode *devvp; 119 struct ufsmount *ump = 0; 120 struct fs *fs; 121 int error, flags; 122 mode_t accessmode; 123 struct nameidata ndp; 124 struct export_args export; 125 char *fspec; 126 127 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 128 return (EINVAL); 129 if (uma_inode == NULL) { 130 uma_inode = uma_zcreate("FFS inode", 131 sizeof(struct inode), NULL, NULL, NULL, NULL, 132 UMA_ALIGN_PTR, 0); 133 uma_ufs1 = uma_zcreate("FFS1 dinode", 134 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 135 UMA_ALIGN_PTR, 0); 136 uma_ufs2 = uma_zcreate("FFS2 dinode", 137 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 138 UMA_ALIGN_PTR, 0); 139 } 140 141 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 142 if (error) 143 return (error); 144 145 /* 146 * If updating, check whether changing from read-only to 147 * read/write; if there is no device name, that's all we do. 148 */ 149 if (mp->mnt_flag & MNT_UPDATE) { 150 ump = VFSTOUFS(mp); 151 fs = ump->um_fs; 152 devvp = ump->um_devvp; 153 if (fs->fs_ronly == 0 && 154 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 155 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 156 return (error); 157 /* 158 * Flush any dirty data. 159 */ 160 if ((error = ffs_sync(mp, MNT_WAIT, td)) != 0) { 161 vn_finished_write(mp); 162 return (error); 163 } 164 /* 165 * Check for and optionally get rid of files open 166 * for writing. 167 */ 168 flags = WRITECLOSE; 169 if (mp->mnt_flag & MNT_FORCE) 170 flags |= FORCECLOSE; 171 if (mp->mnt_flag & MNT_SOFTDEP) { 172 error = softdep_flushfiles(mp, flags, td); 173 } else { 174 error = ffs_flushfiles(mp, flags, td); 175 } 176 if (error) { 177 vn_finished_write(mp); 178 return (error); 179 } 180 if (fs->fs_pendingblocks != 0 || 181 fs->fs_pendinginodes != 0) { 182 printf("%s: %s: blocks %jd files %d\n", 183 fs->fs_fsmnt, "update error", 184 (intmax_t)fs->fs_pendingblocks, 185 fs->fs_pendinginodes); 186 fs->fs_pendingblocks = 0; 187 fs->fs_pendinginodes = 0; 188 } 189 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 190 fs->fs_clean = 1; 191 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 192 fs->fs_ronly = 0; 193 fs->fs_clean = 0; 194 vn_finished_write(mp); 195 return (error); 196 } 197 vn_finished_write(mp); 198 DROP_GIANT(); 199 g_topology_lock(); 200 g_access(ump->um_cp, 0, -1, 0); 201 g_topology_unlock(); 202 PICKUP_GIANT(); 203 fs->fs_ronly = 1; 204 mp->mnt_flag |= MNT_RDONLY; 205 } 206 if ((mp->mnt_flag & MNT_RELOAD) && 207 (error = ffs_reload(mp, td)) != 0) 208 return (error); 209 if (fs->fs_ronly && 210 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 211 /* 212 * If upgrade to read-write by non-root, then verify 213 * that user has necessary permissions on the device. 214 */ 215 if (suser(td)) { 216 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 217 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 218 td->td_ucred, td)) != 0) { 219 VOP_UNLOCK(devvp, 0, td); 220 return (error); 221 } 222 VOP_UNLOCK(devvp, 0, td); 223 } 224 fs->fs_flags &= ~FS_UNCLEAN; 225 if (fs->fs_clean == 0) { 226 fs->fs_flags |= FS_UNCLEAN; 227 if ((mp->mnt_flag & MNT_FORCE) || 228 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 229 (fs->fs_flags & FS_DOSOFTDEP))) { 230 printf("WARNING: %s was not %s\n", 231 fs->fs_fsmnt, "properly dismounted"); 232 } else { 233 printf( 234"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 235 fs->fs_fsmnt); 236 return (EPERM); 237 } 238 } 239 DROP_GIANT(); 240 g_topology_lock(); 241 /* 242 * If we're the root device, we may not have an E count 243 * yet, get it now. 244 */ 245 if (ump->um_cp->ace == 0) 246 error = g_access(ump->um_cp, 0, 1, 1); 247 else 248 error = g_access(ump->um_cp, 0, 1, 0); 249 g_topology_unlock(); 250 PICKUP_GIANT(); 251 if (error) 252 return (error); 253 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 254 return (error); 255 fs->fs_ronly = 0; 256 mp->mnt_flag &= ~MNT_RDONLY; 257 fs->fs_clean = 0; 258 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 259 vn_finished_write(mp); 260 return (error); 261 } 262 /* check to see if we need to start softdep */ 263 if ((fs->fs_flags & FS_DOSOFTDEP) && 264 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 265 vn_finished_write(mp); 266 return (error); 267 } 268 if (fs->fs_snapinum[0] != 0) 269 ffs_snapshot_mount(mp); 270 vn_finished_write(mp); 271 } 272 /* 273 * Soft updates is incompatible with "async", 274 * so if we are doing softupdates stop the user 275 * from setting the async flag in an update. 276 * Softdep_mount() clears it in an initial mount 277 * or ro->rw remount. 278 */ 279 if (mp->mnt_flag & MNT_SOFTDEP) 280 mp->mnt_flag &= ~MNT_ASYNC; 281 /* 282 * Keep MNT_ACLS flag if it is stored in superblock. 283 */ 284 if ((fs->fs_flags & FS_ACLS) != 0) 285 mp->mnt_flag |= MNT_ACLS; 286 /* 287 * If not updating name, process export requests. 288 */ 289 error = vfs_copyopt(mp->mnt_optnew, "export", &export, sizeof export); 290 if (error == 0 && export.ex_flags != 0) 291 return (vfs_export(mp, &export)); 292 /* 293 * If this is a snapshot request, take the snapshot. 294 */ 295 if (mp->mnt_flag & MNT_SNAPSHOT) 296 return (ffs_snapshot(mp, fspec)); 297 } 298 299 /* 300 * Not an update, or updating the name: look up the name 301 * and verify that it refers to a sensible disk device. 302 */ 303 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 304 if ((error = namei(&ndp)) != 0) 305 return (error); 306 NDFREE(&ndp, NDF_ONLY_PNBUF); 307 devvp = ndp.ni_vp; 308 if (!vn_isdisk(devvp, &error)) { 309 vrele(devvp); 310 return (error); 311 } 312 313 /* 314 * If mount by non-root, then verify that user has necessary 315 * permissions on the device. 316 */ 317 if (suser(td)) { 318 accessmode = VREAD; 319 if ((mp->mnt_flag & MNT_RDONLY) == 0) 320 accessmode |= VWRITE; 321 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 322 if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){ 323 vput(devvp); 324 return (error); 325 } 326 VOP_UNLOCK(devvp, 0, td); 327 } 328 329 if (mp->mnt_flag & MNT_UPDATE) { 330 /* 331 * Update only 332 * 333 * If it's not the same vnode, or at least the same device 334 * then it's not correct. 335 */ 336 337 if (devvp->v_rdev != ump->um_devvp->v_rdev) 338 error = EINVAL; /* needs translation */ 339 vrele(devvp); 340 if (error) 341 return (error); 342 } else { 343 /* 344 * New mount 345 * 346 * We need the name for the mount point (also used for 347 * "last mounted on") copied in. If an error occurs, 348 * the mount point is discarded by the upper level code. 349 * Note that vfs_mount() populates f_mntonname for us. 350 */ 351 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 352 vrele(devvp); 353 return (error); 354 } 355 } 356 vfs_mountedfrom(mp, fspec); 357 return (0); 358} 359 360/* 361 * Compatibility with old mount system call. 362 */ 363 364static int 365ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 366{ 367 struct ufs_args args; 368 int error; 369 370 if (data == NULL) 371 return (EINVAL); 372 error = copyin(data, &args, sizeof args); 373 if (error) 374 return (error); 375 376 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 377 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 378 error = kernel_mount(ma, flags); 379 380 return (error); 381} 382 383/* 384 * Reload all incore data for a filesystem (used after running fsck on 385 * the root filesystem and finding things to fix). The filesystem must 386 * be mounted read-only. 387 * 388 * Things to do to update the mount: 389 * 1) invalidate all cached meta-data. 390 * 2) re-read superblock from disk. 391 * 3) re-read summary information from disk. 392 * 4) invalidate all inactive vnodes. 393 * 5) invalidate all cached file data. 394 * 6) re-read inode data for all active vnodes. 395 */ 396static int 397ffs_reload(struct mount *mp, struct thread *td) 398{ 399 struct vnode *vp, *nvp, *devvp; 400 struct inode *ip; 401 void *space; 402 struct buf *bp; 403 struct fs *fs, *newfs; 404 struct ufsmount *ump; 405 ufs2_daddr_t sblockloc; 406 int i, blks, size, error; 407 int32_t *lp; 408 409 if ((mp->mnt_flag & MNT_RDONLY) == 0) 410 return (EINVAL); 411 ump = VFSTOUFS(mp); 412 /* 413 * Step 1: invalidate all cached meta-data. 414 */ 415 devvp = VFSTOUFS(mp)->um_devvp; 416 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 417 if (vinvalbuf(devvp, 0, td, 0, 0) != 0) 418 panic("ffs_reload: dirty1"); 419 VOP_UNLOCK(devvp, 0, td); 420 421 /* 422 * Step 2: re-read superblock from disk. 423 */ 424 fs = VFSTOUFS(mp)->um_fs; 425 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 426 NOCRED, &bp)) != 0) 427 return (error); 428 newfs = (struct fs *)bp->b_data; 429 if ((newfs->fs_magic != FS_UFS1_MAGIC && 430 newfs->fs_magic != FS_UFS2_MAGIC) || 431 newfs->fs_bsize > MAXBSIZE || 432 newfs->fs_bsize < sizeof(struct fs)) { 433 brelse(bp); 434 return (EIO); /* XXX needs translation */ 435 } 436 /* 437 * Copy pointer fields back into superblock before copying in XXX 438 * new superblock. These should really be in the ufsmount. XXX 439 * Note that important parameters (eg fs_ncg) are unchanged. 440 */ 441 newfs->fs_csp = fs->fs_csp; 442 newfs->fs_maxcluster = fs->fs_maxcluster; 443 newfs->fs_contigdirs = fs->fs_contigdirs; 444 newfs->fs_active = fs->fs_active; 445 /* The file system is still read-only. */ 446 newfs->fs_ronly = 1; 447 sblockloc = fs->fs_sblockloc; 448 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 449 brelse(bp); 450 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 451 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 452 UFS_LOCK(ump); 453 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 454 printf("%s: reload pending error: blocks %jd files %d\n", 455 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 456 fs->fs_pendinginodes); 457 fs->fs_pendingblocks = 0; 458 fs->fs_pendinginodes = 0; 459 } 460 UFS_UNLOCK(ump); 461 462 /* 463 * Step 3: re-read summary information from disk. 464 */ 465 blks = howmany(fs->fs_cssize, fs->fs_fsize); 466 space = fs->fs_csp; 467 for (i = 0; i < blks; i += fs->fs_frag) { 468 size = fs->fs_bsize; 469 if (i + fs->fs_frag > blks) 470 size = (blks - i) * fs->fs_fsize; 471 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 472 NOCRED, &bp); 473 if (error) 474 return (error); 475 bcopy(bp->b_data, space, (u_int)size); 476 space = (char *)space + size; 477 brelse(bp); 478 } 479 /* 480 * We no longer know anything about clusters per cylinder group. 481 */ 482 if (fs->fs_contigsumsize > 0) { 483 lp = fs->fs_maxcluster; 484 for (i = 0; i < fs->fs_ncg; i++) 485 *lp++ = fs->fs_contigsumsize; 486 } 487 488loop: 489 MNT_ILOCK(mp); 490 MNT_VNODE_FOREACH(vp, mp, nvp) { 491 VI_LOCK(vp); 492 if (vp->v_iflag & VI_XLOCK) { 493 VI_UNLOCK(vp); 494 continue; 495 } 496 MNT_IUNLOCK(mp); 497 /* 498 * Step 4: invalidate all inactive vnodes. 499 */ 500 if (vp->v_usecount == 0) { 501 vgonel(vp, td); 502 goto loop; 503 } 504 /* 505 * Step 5: invalidate all cached file data. 506 */ 507 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 508 goto loop; 509 } 510 if (vinvalbuf(vp, 0, td, 0, 0)) 511 panic("ffs_reload: dirty2"); 512 /* 513 * Step 6: re-read inode data for all active vnodes. 514 */ 515 ip = VTOI(vp); 516 error = 517 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 518 (int)fs->fs_bsize, NOCRED, &bp); 519 if (error) { 520 VOP_UNLOCK(vp, 0, td); 521 vrele(vp); 522 return (error); 523 } 524 ffs_load_inode(bp, ip, fs, ip->i_number); 525 ip->i_effnlink = ip->i_nlink; 526 brelse(bp); 527 VOP_UNLOCK(vp, 0, td); 528 vrele(vp); 529 MNT_ILOCK(mp); 530 } 531 MNT_IUNLOCK(mp); 532 return (0); 533} 534 535/* 536 * Possible superblock locations ordered from most to least likely. 537 */ 538static int sblock_try[] = SBLOCKSEARCH; 539 540/* 541 * Common code for mount and mountroot 542 */ 543static int 544ffs_mountfs(devvp, mp, td) 545 struct vnode *devvp; 546 struct mount *mp; 547 struct thread *td; 548{ 549 struct ufsmount *ump; 550 struct buf *bp; 551 struct fs *fs; 552 struct cdev *dev; 553 void *space; 554 ufs2_daddr_t sblockloc; 555 int error, i, blks, size, ronly; 556 int32_t *lp; 557 struct ucred *cred; 558 struct g_consumer *cp; 559 560 dev = devvp->v_rdev; 561 cred = td ? td->td_ucred : NOCRED; 562 563 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 564 DROP_GIANT(); 565 g_topology_lock(); 566 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 567 568 /* 569 * If we are a root mount, drop the E flag so fsck can do its magic. 570 * We will pick it up again when we remount R/W. 571 */ 572 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 573 error = g_access(cp, 0, 0, -1); 574 g_topology_unlock(); 575 PICKUP_GIANT(); 576 VOP_UNLOCK(devvp, 0, td); 577 if (error) 578 return (error); 579 if (devvp->v_rdev->si_iosize_max != 0) 580 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 581 if (mp->mnt_iosize_max > MAXPHYS) 582 mp->mnt_iosize_max = MAXPHYS; 583 584 devvp->v_bufobj.bo_private = cp; 585 devvp->v_bufobj.bo_ops = &ffs_ops; 586 587 bp = NULL; 588 ump = NULL; 589 fs = NULL; 590 sblockloc = 0; 591 /* 592 * Try reading the superblock in each of its possible locations. 593 */ 594 for (i = 0; sblock_try[i] != -1; i++) { 595 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 596 cred, &bp)) != 0) 597 goto out; 598 fs = (struct fs *)bp->b_data; 599 sblockloc = sblock_try[i]; 600 if ((fs->fs_magic == FS_UFS1_MAGIC || 601 (fs->fs_magic == FS_UFS2_MAGIC && 602 (fs->fs_sblockloc == sblockloc || 603 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 604 fs->fs_bsize <= MAXBSIZE && 605 fs->fs_bsize >= sizeof(struct fs)) 606 break; 607 brelse(bp); 608 bp = NULL; 609 } 610 if (sblock_try[i] == -1) { 611 error = EINVAL; /* XXX needs translation */ 612 goto out; 613 } 614 fs->fs_fmod = 0; 615 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 616 fs->fs_flags &= ~FS_UNCLEAN; 617 if (fs->fs_clean == 0) { 618 fs->fs_flags |= FS_UNCLEAN; 619 if (ronly || (mp->mnt_flag & MNT_FORCE) || 620 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 621 (fs->fs_flags & FS_DOSOFTDEP))) { 622 printf( 623"WARNING: %s was not properly dismounted\n", 624 fs->fs_fsmnt); 625 } else { 626 printf( 627"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 628 fs->fs_fsmnt); 629 error = EPERM; 630 goto out; 631 } 632 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 633 (mp->mnt_flag & MNT_FORCE)) { 634 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 635 (intmax_t)fs->fs_pendingblocks, 636 fs->fs_pendinginodes); 637 fs->fs_pendingblocks = 0; 638 fs->fs_pendinginodes = 0; 639 } 640 } 641 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 642 printf("%s: mount pending error: blocks %jd files %d\n", 643 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 644 fs->fs_pendinginodes); 645 fs->fs_pendingblocks = 0; 646 fs->fs_pendinginodes = 0; 647 } 648 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 649 ump->um_cp = cp; 650 ump->um_bo = &devvp->v_bufobj; 651 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 652 if (fs->fs_magic == FS_UFS1_MAGIC) { 653 ump->um_fstype = UFS1; 654 ump->um_balloc = ffs_balloc_ufs1; 655 } else { 656 ump->um_fstype = UFS2; 657 ump->um_balloc = ffs_balloc_ufs2; 658 } 659 ump->um_blkatoff = ffs_blkatoff; 660 ump->um_truncate = ffs_truncate; 661 ump->um_update = ffs_update; 662 ump->um_valloc = ffs_valloc; 663 ump->um_vfree = ffs_vfree; 664 ump->um_ifree = ffs_ifree; 665 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 666 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 667 if (fs->fs_sbsize < SBLOCKSIZE) 668 bp->b_flags |= B_INVAL | B_NOCACHE; 669 brelse(bp); 670 bp = NULL; 671 fs = ump->um_fs; 672 ffs_oldfscompat_read(fs, ump, sblockloc); 673 fs->fs_ronly = ronly; 674 size = fs->fs_cssize; 675 blks = howmany(size, fs->fs_fsize); 676 if (fs->fs_contigsumsize > 0) 677 size += fs->fs_ncg * sizeof(int32_t); 678 size += fs->fs_ncg * sizeof(u_int8_t); 679 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 680 fs->fs_csp = space; 681 for (i = 0; i < blks; i += fs->fs_frag) { 682 size = fs->fs_bsize; 683 if (i + fs->fs_frag > blks) 684 size = (blks - i) * fs->fs_fsize; 685 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 686 cred, &bp)) != 0) { 687 free(fs->fs_csp, M_UFSMNT); 688 goto out; 689 } 690 bcopy(bp->b_data, space, (u_int)size); 691 space = (char *)space + size; 692 brelse(bp); 693 bp = NULL; 694 } 695 if (fs->fs_contigsumsize > 0) { 696 fs->fs_maxcluster = lp = space; 697 for (i = 0; i < fs->fs_ncg; i++) 698 *lp++ = fs->fs_contigsumsize; 699 space = lp; 700 } 701 size = fs->fs_ncg * sizeof(u_int8_t); 702 fs->fs_contigdirs = (u_int8_t *)space; 703 bzero(fs->fs_contigdirs, size); 704 fs->fs_active = NULL; 705 mp->mnt_data = (qaddr_t)ump; 706 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 707 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 708 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 709 vfs_getvfs(&mp->mnt_stat.f_fsid)) 710 vfs_getnewfsid(mp); 711 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 712 mp->mnt_flag |= MNT_LOCAL; 713 if ((fs->fs_flags & FS_MULTILABEL) != 0) 714#ifdef MAC 715 mp->mnt_flag |= MNT_MULTILABEL; 716#else 717 printf( 718"WARNING: %s: multilabel flag on fs but no MAC support\n", 719 fs->fs_fsmnt); 720#endif 721 if ((fs->fs_flags & FS_ACLS) != 0) 722#ifdef UFS_ACL 723 mp->mnt_flag |= MNT_ACLS; 724#else 725 printf( 726"WARNING: %s: ACLs flag on fs but no ACLs support\n", 727 fs->fs_fsmnt); 728#endif 729 ump->um_mountp = mp; 730 ump->um_dev = dev; 731 ump->um_devvp = devvp; 732 ump->um_nindir = fs->fs_nindir; 733 ump->um_bptrtodb = fs->fs_fsbtodb; 734 ump->um_seqinc = fs->fs_frag; 735 for (i = 0; i < MAXQUOTAS; i++) 736 ump->um_quotas[i] = NULLVP; 737#ifdef UFS_EXTATTR 738 ufs_extattr_uepm_init(&ump->um_extattr); 739#endif 740 /* 741 * Set FS local "last mounted on" information (NULL pad) 742 */ 743 vfs_mountedfrom(mp, fs->fs_fsmnt); 744 745 if( mp->mnt_flag & MNT_ROOTFS) { 746 /* 747 * Root mount; update timestamp in mount structure. 748 * this will be used by the common root mount code 749 * to update the system clock. 750 */ 751 mp->mnt_time = fs->fs_time; 752 } 753 754 if (ronly == 0) { 755 if ((fs->fs_flags & FS_DOSOFTDEP) && 756 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 757 free(fs->fs_csp, M_UFSMNT); 758 goto out; 759 } 760 if (fs->fs_snapinum[0] != 0) 761 ffs_snapshot_mount(mp); 762 fs->fs_fmod = 1; 763 fs->fs_clean = 0; 764 (void) ffs_sbupdate(ump, MNT_WAIT); 765 } 766 /* 767 * Initialize filesystem stat information in mount struct. 768 */ 769#ifdef UFS_EXTATTR 770#ifdef UFS_EXTATTR_AUTOSTART 771 /* 772 * 773 * Auto-starting does the following: 774 * - check for /.attribute in the fs, and extattr_start if so 775 * - for each file in .attribute, enable that file with 776 * an attribute of the same name. 777 * Not clear how to report errors -- probably eat them. 778 * This would all happen while the filesystem was busy/not 779 * available, so would effectively be "atomic". 780 */ 781 (void) ufs_extattr_autostart(mp, td); 782#endif /* !UFS_EXTATTR_AUTOSTART */ 783#endif /* !UFS_EXTATTR */ 784#ifndef QUOTA 785 mp->mnt_kern_flag |= MNTK_MPSAFE; 786#endif 787 return (0); 788out: 789 if (bp) 790 brelse(bp); 791 vinvalbuf(devvp, V_SAVE, td, 0, 0); 792 if (cp != NULL) { 793 DROP_GIANT(); 794 g_topology_lock(); 795 g_vfs_close(cp, td); 796 g_topology_unlock(); 797 PICKUP_GIANT(); 798 } 799 if (ump) { 800 mtx_destroy(UFS_MTX(ump)); 801 free(ump->um_fs, M_UFSMNT); 802 free(ump, M_UFSMNT); 803 mp->mnt_data = (qaddr_t)0; 804 } 805 return (error); 806} 807 808#include <sys/sysctl.h> 809int bigcgs = 0; 810SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 811 812/* 813 * Sanity checks for loading old filesystem superblocks. 814 * See ffs_oldfscompat_write below for unwound actions. 815 * 816 * XXX - Parts get retired eventually. 817 * Unfortunately new bits get added. 818 */ 819static void 820ffs_oldfscompat_read(fs, ump, sblockloc) 821 struct fs *fs; 822 struct ufsmount *ump; 823 ufs2_daddr_t sblockloc; 824{ 825 off_t maxfilesize; 826 827 /* 828 * If not yet done, update fs_flags location and value of fs_sblockloc. 829 */ 830 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 831 fs->fs_flags = fs->fs_old_flags; 832 fs->fs_old_flags |= FS_FLAGS_UPDATED; 833 fs->fs_sblockloc = sblockloc; 834 } 835 /* 836 * If not yet done, update UFS1 superblock with new wider fields. 837 */ 838 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 839 fs->fs_maxbsize = fs->fs_bsize; 840 fs->fs_time = fs->fs_old_time; 841 fs->fs_size = fs->fs_old_size; 842 fs->fs_dsize = fs->fs_old_dsize; 843 fs->fs_csaddr = fs->fs_old_csaddr; 844 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 845 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 846 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 847 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 848 } 849 if (fs->fs_magic == FS_UFS1_MAGIC && 850 fs->fs_old_inodefmt < FS_44INODEFMT) { 851 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 852 fs->fs_qbmask = ~fs->fs_bmask; 853 fs->fs_qfmask = ~fs->fs_fmask; 854 } 855 if (fs->fs_magic == FS_UFS1_MAGIC) { 856 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 857 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 858 if (fs->fs_maxfilesize > maxfilesize) 859 fs->fs_maxfilesize = maxfilesize; 860 } 861 /* Compatibility for old filesystems */ 862 if (fs->fs_avgfilesize <= 0) 863 fs->fs_avgfilesize = AVFILESIZ; 864 if (fs->fs_avgfpdir <= 0) 865 fs->fs_avgfpdir = AFPDIR; 866 if (bigcgs) { 867 fs->fs_save_cgsize = fs->fs_cgsize; 868 fs->fs_cgsize = fs->fs_bsize; 869 } 870} 871 872/* 873 * Unwinding superblock updates for old filesystems. 874 * See ffs_oldfscompat_read above for details. 875 * 876 * XXX - Parts get retired eventually. 877 * Unfortunately new bits get added. 878 */ 879static void 880ffs_oldfscompat_write(fs, ump) 881 struct fs *fs; 882 struct ufsmount *ump; 883{ 884 885 /* 886 * Copy back UFS2 updated fields that UFS1 inspects. 887 */ 888 if (fs->fs_magic == FS_UFS1_MAGIC) { 889 fs->fs_old_time = fs->fs_time; 890 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 891 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 892 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 893 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 894 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 895 } 896 if (bigcgs) { 897 fs->fs_cgsize = fs->fs_save_cgsize; 898 fs->fs_save_cgsize = 0; 899 } 900} 901 902/* 903 * unmount system call 904 */ 905int 906ffs_unmount(mp, mntflags, td) 907 struct mount *mp; 908 int mntflags; 909 struct thread *td; 910{ 911 struct ufsmount *ump = VFSTOUFS(mp); 912 struct fs *fs; 913 int error, flags; 914 915 flags = 0; 916 if (mntflags & MNT_FORCE) { 917 flags |= FORCECLOSE; 918 } 919#ifdef UFS_EXTATTR 920 if ((error = ufs_extattr_stop(mp, td))) { 921 if (error != EOPNOTSUPP) 922 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 923 error); 924 } else { 925 ufs_extattr_uepm_destroy(&ump->um_extattr); 926 } 927#endif 928 if (mp->mnt_flag & MNT_SOFTDEP) { 929 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 930 return (error); 931 } else { 932 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 933 return (error); 934 } 935 fs = ump->um_fs; 936 UFS_LOCK(ump); 937 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 938 printf("%s: unmount pending error: blocks %jd files %d\n", 939 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 940 fs->fs_pendinginodes); 941 fs->fs_pendingblocks = 0; 942 fs->fs_pendinginodes = 0; 943 } 944 UFS_UNLOCK(ump); 945 if (fs->fs_ronly == 0) { 946 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 947 error = ffs_sbupdate(ump, MNT_WAIT); 948 if (error) { 949 fs->fs_clean = 0; 950 return (error); 951 } 952 } 953 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0); 954 DROP_GIANT(); 955 g_topology_lock(); 956 g_vfs_close(ump->um_cp, td); 957 g_topology_unlock(); 958 PICKUP_GIANT(); 959 vrele(ump->um_devvp); 960 mtx_destroy(UFS_MTX(ump)); 961 free(fs->fs_csp, M_UFSMNT); 962 free(fs, M_UFSMNT); 963 free(ump, M_UFSMNT); 964 mp->mnt_data = (qaddr_t)0; 965 mp->mnt_flag &= ~MNT_LOCAL; 966 return (error); 967} 968 969/* 970 * Flush out all the files in a filesystem. 971 */ 972int 973ffs_flushfiles(mp, flags, td) 974 struct mount *mp; 975 int flags; 976 struct thread *td; 977{ 978 struct ufsmount *ump; 979 int error; 980 981 ump = VFSTOUFS(mp); 982#ifdef QUOTA 983 if (mp->mnt_flag & MNT_QUOTA) { 984 int i; 985 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 986 if (error) 987 return (error); 988 for (i = 0; i < MAXQUOTAS; i++) { 989 if (ump->um_quotas[i] == NULLVP) 990 continue; 991 quotaoff(td, mp, i); 992 } 993 /* 994 * Here we fall through to vflush again to ensure 995 * that we have gotten rid of all the system vnodes. 996 */ 997 } 998#endif 999 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1000 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1001 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1002 return (error); 1003 ffs_snapshot_unmount(mp); 1004 /* 1005 * Here we fall through to vflush again to ensure 1006 * that we have gotten rid of all the system vnodes. 1007 */ 1008 } 1009 /* 1010 * Flush all the files. 1011 */ 1012 if ((error = vflush(mp, 0, flags, td)) != 0) 1013 return (error); 1014 /* 1015 * Flush filesystem metadata. 1016 */ 1017 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1018 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1019 VOP_UNLOCK(ump->um_devvp, 0, td); 1020 return (error); 1021} 1022 1023/* 1024 * Get filesystem statistics. 1025 */ 1026int 1027ffs_statfs(mp, sbp, td) 1028 struct mount *mp; 1029 struct statfs *sbp; 1030 struct thread *td; 1031{ 1032 struct ufsmount *ump; 1033 struct fs *fs; 1034 1035 ump = VFSTOUFS(mp); 1036 fs = ump->um_fs; 1037 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1038 panic("ffs_statfs"); 1039 sbp->f_version = STATFS_VERSION; 1040 sbp->f_bsize = fs->fs_fsize; 1041 sbp->f_iosize = fs->fs_bsize; 1042 sbp->f_blocks = fs->fs_dsize; 1043 UFS_LOCK(ump); 1044 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1045 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1046 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1047 dbtofsb(fs, fs->fs_pendingblocks); 1048 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1049 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1050 UFS_UNLOCK(ump); 1051 sbp->f_namemax = NAME_MAX; 1052 return (0); 1053} 1054 1055/* 1056 * Go through the disk queues to initiate sandbagged IO; 1057 * go through the inodes to write those that have been modified; 1058 * initiate the writing of the super block if it has been modified. 1059 * 1060 * Note: we are always called with the filesystem marked `MPBUSY'. 1061 */ 1062int 1063ffs_sync(mp, waitfor, td) 1064 struct mount *mp; 1065 int waitfor; 1066 struct thread *td; 1067{ 1068 struct vnode *nvp, *vp, *devvp; 1069 struct inode *ip; 1070 struct ufsmount *ump = VFSTOUFS(mp); 1071 struct fs *fs; 1072 int error, count, wait, lockreq, allerror = 0; 1073 struct bufobj *bo; 1074 1075 fs = ump->um_fs; 1076 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1077 printf("fs = %s\n", fs->fs_fsmnt); 1078 panic("ffs_sync: rofs mod"); 1079 } 1080 /* 1081 * Write back each (modified) inode. 1082 */ 1083 wait = 0; 1084 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1085 if (waitfor == MNT_WAIT) { 1086 wait = 1; 1087 lockreq = LK_EXCLUSIVE; 1088 } 1089 lockreq |= LK_INTERLOCK; 1090 MNT_ILOCK(mp); 1091loop: 1092 MNT_VNODE_FOREACH(vp, mp, nvp) { 1093 /* 1094 * Depend on the mntvnode_slock to keep things stable enough 1095 * for a quick test. Since there might be hundreds of 1096 * thousands of vnodes, we cannot afford even a subroutine 1097 * call unless there's a good chance that we have work to do. 1098 */ 1099 VI_LOCK(vp); 1100 if (vp->v_iflag & VI_XLOCK) { 1101 VI_UNLOCK(vp); 1102 continue; 1103 } 1104 ip = VTOI(vp); 1105 if (vp->v_type == VNON || ((ip->i_flag & 1106 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1107 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1108 VI_UNLOCK(vp); 1109 continue; 1110 } 1111 MNT_IUNLOCK(mp); 1112 if ((error = vget(vp, lockreq, td)) != 0) { 1113 MNT_ILOCK(mp); 1114 if (error == ENOENT) 1115 goto loop; 1116 continue; 1117 } 1118 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1119 allerror = error; 1120 VOP_UNLOCK(vp, 0, td); 1121 vrele(vp); 1122 MNT_ILOCK(mp); 1123 } 1124 MNT_IUNLOCK(mp); 1125 /* 1126 * Force stale filesystem control information to be flushed. 1127 */ 1128 if (waitfor == MNT_WAIT) { 1129 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1130 allerror = error; 1131 /* Flushed work items may create new vnodes to clean */ 1132 if (allerror == 0 && count) { 1133 MNT_ILOCK(mp); 1134 goto loop; 1135 } 1136 } 1137#ifdef QUOTA 1138 qsync(mp); 1139#endif 1140 devvp = ump->um_devvp; 1141 VI_LOCK(devvp); 1142 bo = &devvp->v_bufobj; 1143 if (waitfor != MNT_LAZY && 1144 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1145 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1146 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1147 allerror = error; 1148 VOP_UNLOCK(devvp, 0, td); 1149 if (allerror == 0 && waitfor == MNT_WAIT) { 1150 MNT_ILOCK(mp); 1151 goto loop; 1152 } 1153 } else 1154 VI_UNLOCK(devvp); 1155 /* 1156 * Write back modified superblock. 1157 */ 1158 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1159 allerror = error; 1160 return (allerror); 1161} 1162 1163int 1164ffs_vget(mp, ino, flags, vpp) 1165 struct mount *mp; 1166 ino_t ino; 1167 int flags; 1168 struct vnode **vpp; 1169{ 1170 struct thread *td = curthread; /* XXX */ 1171 struct fs *fs; 1172 struct inode *ip; 1173 struct ufsmount *ump; 1174 struct buf *bp; 1175 struct vnode *vp; 1176 struct cdev *dev; 1177 int error; 1178 1179 ump = VFSTOUFS(mp); 1180 dev = ump->um_dev; 1181 1182 /* 1183 * We do not lock vnode creation as it is believed to be too 1184 * expensive for such rare case as simultaneous creation of vnode 1185 * for same ino by different processes. We just allow them to race 1186 * and check later to decide who wins. Let the race begin! 1187 */ 1188 if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) 1189 return (error); 1190 if (*vpp != NULL) 1191 return (0); 1192 1193 /* 1194 * If this MALLOC() is performed after the getnewvnode() 1195 * it might block, leaving a vnode with a NULL v_data to be 1196 * found by ffs_sync() if a sync happens to fire right then, 1197 * which will cause a panic because ffs_sync() blindly 1198 * dereferences vp->v_data (as well it should). 1199 */ 1200 ip = uma_zalloc(uma_inode, M_WAITOK); 1201 1202 /* Allocate a new vnode/inode. */ 1203 error = getnewvnode("ufs", mp, &ffs_vnodeops, &vp); 1204 if (error) { 1205 *vpp = NULL; 1206 uma_zfree(uma_inode, ip); 1207 return (error); 1208 } 1209 bzero((caddr_t)ip, sizeof(struct inode)); 1210 /* 1211 * FFS supports recursive locking. 1212 */ 1213 fs = ump->um_fs; 1214 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1215 vp->v_data = ip; 1216 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1217 ip->i_vnode = vp; 1218 ip->i_ump = ump; 1219 ip->i_fs = fs; 1220 ip->i_dev = dev; 1221 ip->i_number = ino; 1222#ifdef QUOTA 1223 { 1224 int i; 1225 for (i = 0; i < MAXQUOTAS; i++) 1226 ip->i_dquot[i] = NODQUOT; 1227 } 1228#endif 1229 /* 1230 * Exclusively lock the vnode before adding to hash. Note, that we 1231 * must not release nor downgrade the lock (despite flags argument 1232 * says) till it is fully initialized. 1233 */ 1234 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td); 1235 1236 /* 1237 * Atomicaly (in terms of ufs_hash operations) check the hash for 1238 * duplicate of vnode being created and add it to the hash. If a 1239 * duplicate vnode was found, it will be vget()ed from hash for us. 1240 */ 1241 if ((error = ufs_ihashins(ip, flags, vpp)) != 0) { 1242 vput(vp); 1243 *vpp = NULL; 1244 return (error); 1245 } 1246 1247 /* We lost the race, then throw away our vnode and return existing */ 1248 if (*vpp != NULL) { 1249 vput(vp); 1250 return (0); 1251 } 1252 1253 /* Read in the disk contents for the inode, copy into the inode. */ 1254 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1255 (int)fs->fs_bsize, NOCRED, &bp); 1256 if (error) { 1257 /* 1258 * The inode does not contain anything useful, so it would 1259 * be misleading to leave it on its hash chain. With mode 1260 * still zero, it will be unlinked and returned to the free 1261 * list by vput(). 1262 */ 1263 brelse(bp); 1264 vput(vp); 1265 *vpp = NULL; 1266 return (error); 1267 } 1268 if (ip->i_ump->um_fstype == UFS1) 1269 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1270 else 1271 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1272 ffs_load_inode(bp, ip, fs, ino); 1273 if (DOINGSOFTDEP(vp)) 1274 softdep_load_inodeblock(ip); 1275 else 1276 ip->i_effnlink = ip->i_nlink; 1277 bqrelse(bp); 1278 1279 /* 1280 * Initialize the vnode from the inode, check for aliases. 1281 * Note that the underlying vnode may have changed. 1282 */ 1283 error = ufs_vinit(mp, &ffs_fifoops, &vp); 1284 if (error) { 1285 vput(vp); 1286 *vpp = NULL; 1287 return (error); 1288 } 1289 /* 1290 * Finish inode initialization. 1291 */ 1292 VREF(ip->i_devvp); 1293 /* 1294 * Set up a generation number for this inode if it does not 1295 * already have one. This should only happen on old filesystems. 1296 */ 1297 if (ip->i_gen == 0) { 1298 ip->i_gen = arc4random() / 2 + 1; 1299 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1300 ip->i_flag |= IN_MODIFIED; 1301 DIP_SET(ip, i_gen, ip->i_gen); 1302 } 1303 } 1304 /* 1305 * Ensure that uid and gid are correct. This is a temporary 1306 * fix until fsck has been changed to do the update. 1307 */ 1308 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1309 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1310 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1311 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1312 } /* XXX */ 1313 1314#ifdef MAC 1315 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1316 /* 1317 * If this vnode is already allocated, and we're running 1318 * multi-label, attempt to perform a label association 1319 * from the extended attributes on the inode. 1320 */ 1321 error = mac_associate_vnode_extattr(mp, vp); 1322 if (error) { 1323 /* ufs_inactive will release ip->i_devvp ref. */ 1324 vput(vp); 1325 *vpp = NULL; 1326 return (error); 1327 } 1328 } 1329#endif 1330 1331 *vpp = vp; 1332 return (0); 1333} 1334 1335/* 1336 * File handle to vnode 1337 * 1338 * Have to be really careful about stale file handles: 1339 * - check that the inode number is valid 1340 * - call ffs_vget() to get the locked inode 1341 * - check for an unallocated inode (i_mode == 0) 1342 * - check that the given client host has export rights and return 1343 * those rights via. exflagsp and credanonp 1344 */ 1345int 1346ffs_fhtovp(mp, fhp, vpp) 1347 struct mount *mp; 1348 struct fid *fhp; 1349 struct vnode **vpp; 1350{ 1351 struct ufid *ufhp; 1352 struct fs *fs; 1353 1354 ufhp = (struct ufid *)fhp; 1355 fs = VFSTOUFS(mp)->um_fs; 1356 if (ufhp->ufid_ino < ROOTINO || 1357 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1358 return (ESTALE); 1359 return (ufs_fhtovp(mp, ufhp, vpp)); 1360} 1361 1362/* 1363 * Vnode pointer to File handle 1364 */ 1365/* ARGSUSED */ 1366int 1367ffs_vptofh(vp, fhp) 1368 struct vnode *vp; 1369 struct fid *fhp; 1370{ 1371 struct inode *ip; 1372 struct ufid *ufhp; 1373 1374 ip = VTOI(vp); 1375 ufhp = (struct ufid *)fhp; 1376 ufhp->ufid_len = sizeof(struct ufid); 1377 ufhp->ufid_ino = ip->i_number; 1378 ufhp->ufid_gen = ip->i_gen; 1379 return (0); 1380} 1381 1382/* 1383 * Initialize the filesystem. 1384 */ 1385static int 1386ffs_init(vfsp) 1387 struct vfsconf *vfsp; 1388{ 1389 1390 softdep_initialize(); 1391 return (ufs_init(vfsp)); 1392} 1393 1394/* 1395 * Undo the work of ffs_init(). 1396 */ 1397static int 1398ffs_uninit(vfsp) 1399 struct vfsconf *vfsp; 1400{ 1401 int ret; 1402 1403 ret = ufs_uninit(vfsp); 1404 softdep_uninitialize(); 1405 return (ret); 1406} 1407 1408/* 1409 * Write a superblock and associated information back to disk. 1410 */ 1411static int 1412ffs_sbupdate(mp, waitfor) 1413 struct ufsmount *mp; 1414 int waitfor; 1415{ 1416 struct fs *fs = mp->um_fs; 1417 struct buf *sbbp; 1418 struct buf *bp; 1419 int blks; 1420 void *space; 1421 int i, size, error, allerror = 0; 1422 1423 if (fs->fs_ronly == 1 && 1424 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1425 (MNT_RDONLY | MNT_UPDATE)) 1426 panic("ffs_sbupdate: write read-only filesystem"); 1427 /* 1428 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1429 */ 1430 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1431 0, 0, 0); 1432 /* 1433 * First write back the summary information. 1434 */ 1435 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1436 space = fs->fs_csp; 1437 for (i = 0; i < blks; i += fs->fs_frag) { 1438 size = fs->fs_bsize; 1439 if (i + fs->fs_frag > blks) 1440 size = (blks - i) * fs->fs_fsize; 1441 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1442 size, 0, 0, 0); 1443 bcopy(space, bp->b_data, (u_int)size); 1444 space = (char *)space + size; 1445 if (waitfor != MNT_WAIT) 1446 bawrite(bp); 1447 else if ((error = bwrite(bp)) != 0) 1448 allerror = error; 1449 } 1450 /* 1451 * Now write back the superblock itself. If any errors occurred 1452 * up to this point, then fail so that the superblock avoids 1453 * being written out as clean. 1454 */ 1455 if (allerror) { 1456 brelse(sbbp); 1457 return (allerror); 1458 } 1459 bp = sbbp; 1460 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1461 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1462 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1463 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1464 fs->fs_sblockloc = SBLOCK_UFS1; 1465 } 1466 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1467 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1468 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1469 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1470 fs->fs_sblockloc = SBLOCK_UFS2; 1471 } 1472 fs->fs_fmod = 0; 1473 fs->fs_time = time_second; 1474 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1475 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1476 if (waitfor != MNT_WAIT) 1477 bawrite(bp); 1478 else if ((error = bwrite(bp)) != 0) 1479 allerror = error; 1480 return (allerror); 1481} 1482 1483static int 1484ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1485 int attrnamespace, const char *attrname, struct thread *td) 1486{ 1487 1488#ifdef UFS_EXTATTR 1489 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1490 attrname, td)); 1491#else 1492 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1493 attrname, td)); 1494#endif 1495} 1496 1497static void 1498ffs_ifree(struct ufsmount *ump, struct inode *ip) 1499{ 1500 1501 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1502 uma_zfree(uma_ufs1, ip->i_din1); 1503 else if (ip->i_din2 != NULL) 1504 uma_zfree(uma_ufs2, ip->i_din2); 1505 uma_zfree(uma_inode, ip); 1506} 1507 1508static void 1509ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1510{ 1511 1512#ifdef SOFTUPDATES 1513 if (bp->b_iocmd == BIO_WRITE && softdep_disk_prewrite(bp)) 1514 return; 1515#endif 1516 g_vfs_strategy(bo, bp); 1517} 1518