ffs_vfsops.c revision 138509
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 138509 2004-12-07 08:15:41Z 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/disk.h> 53#include <sys/malloc.h> 54#include <sys/mutex.h> 55 56#include <ufs/ufs/extattr.h> 57#include <ufs/ufs/quota.h> 58#include <ufs/ufs/ufsmount.h> 59#include <ufs/ufs/inode.h> 60#include <ufs/ufs/ufs_extern.h> 61 62#include <ufs/ffs/fs.h> 63#include <ufs/ffs/ffs_extern.h> 64 65#include <vm/vm.h> 66#include <vm/uma.h> 67#include <vm/vm_page.h> 68 69#include <geom/geom.h> 70#include <geom/geom_vfs.h> 71 72uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 73 74static int ffs_sbupdate(struct ufsmount *, int); 75static int ffs_reload(struct mount *, struct thread *); 76static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 77static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 78 ufs2_daddr_t); 79static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 80static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 81static vfs_init_t ffs_init; 82static vfs_uninit_t ffs_uninit; 83static vfs_extattrctl_t ffs_extattrctl; 84static vfs_cmount_t ffs_cmount; 85static vfs_mount_t ffs_mount; 86 87static struct vfsops ufs_vfsops = { 88 .vfs_extattrctl = ffs_extattrctl, 89 .vfs_fhtovp = ffs_fhtovp, 90 .vfs_init = ffs_init, 91 .vfs_mount = ffs_mount, 92 .vfs_cmount = ffs_cmount, 93 .vfs_quotactl = ufs_quotactl, 94 .vfs_root = ufs_root, 95 .vfs_statfs = ffs_statfs, 96 .vfs_sync = ffs_sync, 97 .vfs_uninit = ffs_uninit, 98 .vfs_unmount = ffs_unmount, 99 .vfs_vget = ffs_vget, 100 .vfs_vptofh = ffs_vptofh, 101}; 102 103VFS_SET(ufs_vfsops, ufs, 0); 104 105static b_strategy_t ffs_geom_strategy; 106 107static struct buf_ops ffs_ops = { 108 .bop_name = "FFS", 109 .bop_write = bufwrite, 110 .bop_strategy = ffs_geom_strategy, 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 int len; 127 128 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 129 return (EINVAL); 130 if (uma_inode == NULL) { 131 uma_inode = uma_zcreate("FFS inode", 132 sizeof(struct inode), NULL, NULL, NULL, NULL, 133 UMA_ALIGN_PTR, 0); 134 uma_ufs1 = uma_zcreate("FFS1 dinode", 135 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 136 UMA_ALIGN_PTR, 0); 137 uma_ufs2 = uma_zcreate("FFS2 dinode", 138 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 139 UMA_ALIGN_PTR, 0); 140 } 141 142 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 143 if (error) 144 return (error); 145 146 /* 147 * If updating, check whether changing from read-only to 148 * read/write; if there is no device name, that's all we do. 149 */ 150 if (mp->mnt_flag & MNT_UPDATE) { 151 ump = VFSTOUFS(mp); 152 fs = ump->um_fs; 153 devvp = ump->um_devvp; 154 if (fs->fs_ronly == 0 && 155 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 156 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 157 return (error); 158 /* 159 * Flush any dirty data. 160 */ 161 if ((error = VFS_SYNC(mp, MNT_WAIT, 162 td->td_ucred, td)) != 0) { 163 vn_finished_write(mp); 164 return (error); 165 } 166 /* 167 * Check for and optionally get rid of files open 168 * for writing. 169 */ 170 flags = WRITECLOSE; 171 if (mp->mnt_flag & MNT_FORCE) 172 flags |= FORCECLOSE; 173 if (mp->mnt_flag & MNT_SOFTDEP) { 174 error = softdep_flushfiles(mp, flags, td); 175 } else { 176 error = ffs_flushfiles(mp, flags, td); 177 } 178 if (error) { 179 vn_finished_write(mp); 180 return (error); 181 } 182 if (fs->fs_pendingblocks != 0 || 183 fs->fs_pendinginodes != 0) { 184 printf("%s: %s: blocks %jd files %d\n", 185 fs->fs_fsmnt, "update error", 186 (intmax_t)fs->fs_pendingblocks, 187 fs->fs_pendinginodes); 188 fs->fs_pendingblocks = 0; 189 fs->fs_pendinginodes = 0; 190 } 191 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 192 fs->fs_clean = 1; 193 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 194 fs->fs_ronly = 0; 195 fs->fs_clean = 0; 196 vn_finished_write(mp); 197 return (error); 198 } 199 vn_finished_write(mp); 200 DROP_GIANT(); 201 g_topology_lock(); 202 g_access(ump->um_cp, 0, -1, 0); 203 g_topology_unlock(); 204 PICKUP_GIANT(); 205 fs->fs_ronly = 1; 206 mp->mnt_flag |= MNT_RDONLY; 207 } 208 if ((mp->mnt_flag & MNT_RELOAD) && 209 (error = ffs_reload(mp, td)) != 0) 210 return (error); 211 if (fs->fs_ronly && 212 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 213 /* 214 * If upgrade to read-write by non-root, then verify 215 * that user has necessary permissions on the device. 216 */ 217 if (suser(td)) { 218 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 219 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 220 td->td_ucred, td)) != 0) { 221 VOP_UNLOCK(devvp, 0, td); 222 return (error); 223 } 224 VOP_UNLOCK(devvp, 0, td); 225 } 226 fs->fs_flags &= ~FS_UNCLEAN; 227 if (fs->fs_clean == 0) { 228 fs->fs_flags |= FS_UNCLEAN; 229 if ((mp->mnt_flag & MNT_FORCE) || 230 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 231 (fs->fs_flags & FS_DOSOFTDEP))) { 232 printf("WARNING: %s was not %s\n", 233 fs->fs_fsmnt, "properly dismounted"); 234 } else { 235 printf( 236"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 237 fs->fs_fsmnt); 238 return (EPERM); 239 } 240 } 241 DROP_GIANT(); 242 g_topology_lock(); 243 /* 244 * If we're the root device, we may not have an E count 245 * yet, get it now. 246 */ 247 if (ump->um_cp->ace == 0) 248 error = g_access(ump->um_cp, 0, 1, 1); 249 else 250 error = g_access(ump->um_cp, 0, 1, 0); 251 g_topology_unlock(); 252 PICKUP_GIANT(); 253 if (error) 254 return (error); 255 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 256 return (error); 257 fs->fs_ronly = 0; 258 mp->mnt_flag &= ~MNT_RDONLY; 259 fs->fs_clean = 0; 260 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 261 vn_finished_write(mp); 262 return (error); 263 } 264 /* check to see if we need to start softdep */ 265 if ((fs->fs_flags & FS_DOSOFTDEP) && 266 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 267 vn_finished_write(mp); 268 return (error); 269 } 270 if (fs->fs_snapinum[0] != 0) 271 ffs_snapshot_mount(mp); 272 vn_finished_write(mp); 273 } 274 /* 275 * Soft updates is incompatible with "async", 276 * so if we are doing softupdates stop the user 277 * from setting the async flag in an update. 278 * Softdep_mount() clears it in an initial mount 279 * or ro->rw remount. 280 */ 281 if (mp->mnt_flag & MNT_SOFTDEP) 282 mp->mnt_flag &= ~MNT_ASYNC; 283 /* 284 * If not updating name, process export requests. 285 */ 286 if (fspec == NULL) { 287 error = vfs_getopt(mp->mnt_optnew, 288 "export", (void **)&export, &len); 289 if (error || len != sizeof *export) 290 return (EINVAL); 291 return (vfs_export(mp, export)); 292 } 293 /* 294 * If this is a snapshot request, take the snapshot. 295 */ 296 if (mp->mnt_flag & MNT_SNAPSHOT) 297 return (ffs_snapshot(mp, fspec)); 298 } 299 300 /* 301 * Not an update, or updating the name: look up the name 302 * and verify that it refers to a sensible disk device. 303 */ 304 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 305 if ((error = namei(&ndp)) != 0) 306 return (error); 307 NDFREE(&ndp, NDF_ONLY_PNBUF); 308 devvp = ndp.ni_vp; 309 if (!vn_isdisk(devvp, &error)) { 310 vrele(devvp); 311 return (error); 312 } 313 314 /* 315 * If mount by non-root, then verify that user has necessary 316 * permissions on the device. 317 */ 318 if (suser(td)) { 319 accessmode = VREAD; 320 if ((mp->mnt_flag & MNT_RDONLY) == 0) 321 accessmode |= VWRITE; 322 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 323 if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){ 324 vput(devvp); 325 return (error); 326 } 327 VOP_UNLOCK(devvp, 0, td); 328 } 329 330 if (mp->mnt_flag & MNT_UPDATE) { 331 /* 332 * Update only 333 * 334 * If it's not the same vnode, or at least the same device 335 * then it's not correct. 336 */ 337 338 if (devvp->v_rdev != ump->um_devvp->v_rdev) 339 error = EINVAL; /* needs translation */ 340 vrele(devvp); 341 if (error) 342 return (error); 343 } else { 344 /* 345 * New mount 346 * 347 * We need the name for the mount point (also used for 348 * "last mounted on") copied in. If an error occurs, 349 * the mount point is discarded by the upper level code. 350 * Note that vfs_mount() populates f_mntonname for us. 351 */ 352 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 353 vrele(devvp); 354 return (error); 355 } 356 } 357 vfs_mountedfrom(mp, fspec); 358 return (0); 359} 360 361/* 362 * Compatibility with old mount system call. 363 */ 364 365static int 366ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 367{ 368 struct ufs_args args; 369 int error; 370 371 if (data == NULL) 372 return (EINVAL); 373 error = copyin(data, &args, sizeof args); 374 if (error) 375 return (error); 376 377 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 378 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 379 error = kernel_mount(ma, flags); 380 381 return (error); 382} 383 384/* 385 * Reload all incore data for a filesystem (used after running fsck on 386 * the root filesystem and finding things to fix). The filesystem must 387 * be mounted read-only. 388 * 389 * Things to do to update the mount: 390 * 1) invalidate all cached meta-data. 391 * 2) re-read superblock from disk. 392 * 3) re-read summary information from disk. 393 * 4) invalidate all inactive vnodes. 394 * 5) invalidate all cached file data. 395 * 6) re-read inode data for all active vnodes. 396 */ 397static int 398ffs_reload(struct mount *mp, struct thread *td) 399{ 400 struct vnode *vp, *nvp, *devvp; 401 struct inode *ip; 402 void *space; 403 struct buf *bp; 404 struct fs *fs, *newfs; 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 /* 412 * Step 1: invalidate all cached meta-data. 413 */ 414 devvp = VFSTOUFS(mp)->um_devvp; 415 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 416 if (vinvalbuf(devvp, 0, td->td_ucred, td, 0, 0) != 0) 417 panic("ffs_reload: dirty1"); 418 vfs_object_create(devvp, td, td->td_ucred); 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 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 453 printf("%s: reload pending error: blocks %jd files %d\n", 454 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 455 fs->fs_pendinginodes); 456 fs->fs_pendingblocks = 0; 457 fs->fs_pendinginodes = 0; 458 } 459 460 /* 461 * Step 3: re-read summary information from disk. 462 */ 463 blks = howmany(fs->fs_cssize, fs->fs_fsize); 464 space = fs->fs_csp; 465 for (i = 0; i < blks; i += fs->fs_frag) { 466 size = fs->fs_bsize; 467 if (i + fs->fs_frag > blks) 468 size = (blks - i) * fs->fs_fsize; 469 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 470 NOCRED, &bp); 471 if (error) 472 return (error); 473 bcopy(bp->b_data, space, (u_int)size); 474 space = (char *)space + size; 475 brelse(bp); 476 } 477 /* 478 * We no longer know anything about clusters per cylinder group. 479 */ 480 if (fs->fs_contigsumsize > 0) { 481 lp = fs->fs_maxcluster; 482 for (i = 0; i < fs->fs_ncg; i++) 483 *lp++ = fs->fs_contigsumsize; 484 } 485 486loop: 487 MNT_ILOCK(mp); 488 MNT_VNODE_FOREACH(vp, mp, nvp) { 489 VI_LOCK(vp); 490 if (vp->v_iflag & VI_XLOCK) { 491 VI_UNLOCK(vp); 492 continue; 493 } 494 MNT_IUNLOCK(mp); 495 /* 496 * Step 4: invalidate all inactive vnodes. 497 */ 498 if (vp->v_usecount == 0) { 499 vgonel(vp, td); 500 goto loop; 501 } 502 /* 503 * Step 5: invalidate all cached file data. 504 */ 505 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 506 goto loop; 507 } 508 if (vinvalbuf(vp, 0, td->td_ucred, td, 0, 0)) 509 panic("ffs_reload: dirty2"); 510 /* 511 * Step 6: re-read inode data for all active vnodes. 512 */ 513 ip = VTOI(vp); 514 error = 515 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 516 (int)fs->fs_bsize, NOCRED, &bp); 517 if (error) { 518 VOP_UNLOCK(vp, 0, td); 519 vrele(vp); 520 return (error); 521 } 522 ffs_load_inode(bp, ip, fs, ip->i_number); 523 ip->i_effnlink = ip->i_nlink; 524 brelse(bp); 525 VOP_UNLOCK(vp, 0, td); 526 vrele(vp); 527 MNT_ILOCK(mp); 528 } 529 MNT_IUNLOCK(mp); 530 return (0); 531} 532 533/* 534 * Possible superblock locations ordered from most to least likely. 535 */ 536static int sblock_try[] = SBLOCKSEARCH; 537 538/* 539 * Common code for mount and mountroot 540 */ 541static int 542ffs_mountfs(devvp, mp, td) 543 struct vnode *devvp; 544 struct mount *mp; 545 struct thread *td; 546{ 547 struct ufsmount *ump; 548 struct buf *bp; 549 struct fs *fs; 550 struct cdev *dev; 551 void *space; 552 ufs2_daddr_t sblockloc; 553 int error, i, blks, size, ronly; 554 int32_t *lp; 555 struct ucred *cred; 556 struct g_consumer *cp; 557 558 dev = devvp->v_rdev; 559 cred = td ? td->td_ucred : NOCRED; 560 561 vfs_object_create(devvp, td, td->td_ucred); 562 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 563 DROP_GIANT(); 564 g_topology_lock(); 565 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 566 567 /* 568 * If we are a root mount, drop the E flag so fsck can do its magic. 569 * We will pick it up again when we remount R/W. 570 */ 571 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 572 error = g_access(cp, 0, 0, -1); 573 g_topology_unlock(); 574 PICKUP_GIANT(); 575 VOP_UNLOCK(devvp, 0, td); 576 if (error) 577 return (error); 578 if (devvp->v_rdev->si_iosize_max != 0) 579 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 580 if (mp->mnt_iosize_max > MAXPHYS) 581 mp->mnt_iosize_max = MAXPHYS; 582 583 devvp->v_bufobj.bo_private = cp; 584 devvp->v_bufobj.bo_ops = &ffs_ops; 585 586 bp = NULL; 587 ump = NULL; 588 fs = NULL; 589 sblockloc = 0; 590 /* 591 * Try reading the superblock in each of its possible locations. 592 */ 593 for (i = 0; sblock_try[i] != -1; i++) { 594 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 595 cred, &bp)) != 0) 596 goto out; 597 fs = (struct fs *)bp->b_data; 598 sblockloc = sblock_try[i]; 599 if ((fs->fs_magic == FS_UFS1_MAGIC || 600 (fs->fs_magic == FS_UFS2_MAGIC && 601 (fs->fs_sblockloc == sblockloc || 602 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 603 fs->fs_bsize <= MAXBSIZE && 604 fs->fs_bsize >= sizeof(struct fs)) 605 break; 606 brelse(bp); 607 bp = NULL; 608 } 609 if (sblock_try[i] == -1) { 610 error = EINVAL; /* XXX needs translation */ 611 goto out; 612 } 613 fs->fs_fmod = 0; 614 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 615 fs->fs_flags &= ~FS_UNCLEAN; 616 if (fs->fs_clean == 0) { 617 fs->fs_flags |= FS_UNCLEAN; 618 if (ronly || (mp->mnt_flag & MNT_FORCE) || 619 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 620 (fs->fs_flags & FS_DOSOFTDEP))) { 621 printf( 622"WARNING: %s was not properly dismounted\n", 623 fs->fs_fsmnt); 624 } else { 625 printf( 626"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 627 fs->fs_fsmnt); 628 error = EPERM; 629 goto out; 630 } 631 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 632 (mp->mnt_flag & MNT_FORCE)) { 633 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 634 (intmax_t)fs->fs_pendingblocks, 635 fs->fs_pendinginodes); 636 fs->fs_pendingblocks = 0; 637 fs->fs_pendinginodes = 0; 638 } 639 } 640 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 641 printf("%s: mount pending error: blocks %jd files %d\n", 642 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 643 fs->fs_pendinginodes); 644 fs->fs_pendingblocks = 0; 645 fs->fs_pendinginodes = 0; 646 } 647 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 648 ump->um_cp = cp; 649 ump->um_bo = &devvp->v_bufobj; 650 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 651 if (fs->fs_magic == FS_UFS1_MAGIC) { 652 ump->um_fstype = UFS1; 653 ump->um_balloc = ffs_balloc_ufs1; 654 } else { 655 ump->um_fstype = UFS2; 656 ump->um_balloc = ffs_balloc_ufs2; 657 } 658 ump->um_blkatoff = ffs_blkatoff; 659 ump->um_truncate = ffs_truncate; 660 ump->um_update = ffs_update; 661 ump->um_valloc = ffs_valloc; 662 ump->um_vfree = ffs_vfree; 663 ump->um_ifree = ffs_ifree; 664 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 665 if (fs->fs_sbsize < SBLOCKSIZE) 666 bp->b_flags |= B_INVAL | B_NOCACHE; 667 brelse(bp); 668 bp = NULL; 669 fs = ump->um_fs; 670 ffs_oldfscompat_read(fs, ump, sblockloc); 671 fs->fs_ronly = ronly; 672 size = fs->fs_cssize; 673 blks = howmany(size, fs->fs_fsize); 674 if (fs->fs_contigsumsize > 0) 675 size += fs->fs_ncg * sizeof(int32_t); 676 size += fs->fs_ncg * sizeof(u_int8_t); 677 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 678 fs->fs_csp = space; 679 for (i = 0; i < blks; i += fs->fs_frag) { 680 size = fs->fs_bsize; 681 if (i + fs->fs_frag > blks) 682 size = (blks - i) * fs->fs_fsize; 683 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 684 cred, &bp)) != 0) { 685 free(fs->fs_csp, M_UFSMNT); 686 goto out; 687 } 688 bcopy(bp->b_data, space, (u_int)size); 689 space = (char *)space + size; 690 brelse(bp); 691 bp = NULL; 692 } 693 if (fs->fs_contigsumsize > 0) { 694 fs->fs_maxcluster = lp = space; 695 for (i = 0; i < fs->fs_ncg; i++) 696 *lp++ = fs->fs_contigsumsize; 697 space = lp; 698 } 699 size = fs->fs_ncg * sizeof(u_int8_t); 700 fs->fs_contigdirs = (u_int8_t *)space; 701 bzero(fs->fs_contigdirs, size); 702 fs->fs_active = NULL; 703 mp->mnt_data = (qaddr_t)ump; 704 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 705 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 706 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 707 vfs_getvfs(&mp->mnt_stat.f_fsid)) 708 vfs_getnewfsid(mp); 709 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 710 mp->mnt_flag |= MNT_LOCAL; 711 if ((fs->fs_flags & FS_MULTILABEL) != 0) 712#ifdef MAC 713 mp->mnt_flag |= MNT_MULTILABEL; 714#else 715 printf( 716"WARNING: %s: multilabel flag on fs but no MAC support\n", 717 fs->fs_fsmnt); 718#endif 719 if ((fs->fs_flags & FS_ACLS) != 0) 720#ifdef UFS_ACL 721 mp->mnt_flag |= MNT_ACLS; 722#else 723 printf( 724"WARNING: %s: ACLs flag on fs but no ACLs support\n", 725 fs->fs_fsmnt); 726#endif 727 ump->um_mountp = mp; 728 ump->um_dev = dev; 729 ump->um_devvp = devvp; 730 ump->um_nindir = fs->fs_nindir; 731 ump->um_bptrtodb = fs->fs_fsbtodb; 732 ump->um_seqinc = fs->fs_frag; 733 for (i = 0; i < MAXQUOTAS; i++) 734 ump->um_quotas[i] = NULLVP; 735#ifdef UFS_EXTATTR 736 ufs_extattr_uepm_init(&ump->um_extattr); 737#endif 738 /* 739 * Set FS local "last mounted on" information (NULL pad) 740 */ 741 vfs_mountedfrom(mp, fs->fs_fsmnt); 742 743 if( mp->mnt_flag & MNT_ROOTFS) { 744 /* 745 * Root mount; update timestamp in mount structure. 746 * this will be used by the common root mount code 747 * to update the system clock. 748 */ 749 mp->mnt_time = fs->fs_time; 750 } 751 752 if (ronly == 0) { 753 if ((fs->fs_flags & FS_DOSOFTDEP) && 754 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 755 free(fs->fs_csp, M_UFSMNT); 756 goto out; 757 } 758 if (fs->fs_snapinum[0] != 0) 759 ffs_snapshot_mount(mp); 760 fs->fs_fmod = 1; 761 fs->fs_clean = 0; 762 (void) ffs_sbupdate(ump, MNT_WAIT); 763 } 764 /* 765 * Initialize filesystem stat information in mount struct. 766 */ 767#ifdef UFS_EXTATTR 768#ifdef UFS_EXTATTR_AUTOSTART 769 /* 770 * 771 * Auto-starting does the following: 772 * - check for /.attribute in the fs, and extattr_start if so 773 * - for each file in .attribute, enable that file with 774 * an attribute of the same name. 775 * Not clear how to report errors -- probably eat them. 776 * This would all happen while the filesystem was busy/not 777 * available, so would effectively be "atomic". 778 */ 779 (void) ufs_extattr_autostart(mp, td); 780#endif /* !UFS_EXTATTR_AUTOSTART */ 781#endif /* !UFS_EXTATTR */ 782 return (0); 783out: 784 if (bp) 785 brelse(bp); 786 if (cp != NULL) { 787 DROP_GIANT(); 788 g_topology_lock(); 789 g_wither_geom_close(cp->geom, ENXIO); 790 g_topology_unlock(); 791 PICKUP_GIANT(); 792 } 793 if (ump) { 794 free(ump->um_fs, M_UFSMNT); 795 free(ump, M_UFSMNT); 796 mp->mnt_data = (qaddr_t)0; 797 } 798 return (error); 799} 800 801#include <sys/sysctl.h> 802int bigcgs = 0; 803SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 804 805/* 806 * Sanity checks for loading old filesystem superblocks. 807 * See ffs_oldfscompat_write below for unwound actions. 808 * 809 * XXX - Parts get retired eventually. 810 * Unfortunately new bits get added. 811 */ 812static void 813ffs_oldfscompat_read(fs, ump, sblockloc) 814 struct fs *fs; 815 struct ufsmount *ump; 816 ufs2_daddr_t sblockloc; 817{ 818 off_t maxfilesize; 819 820 /* 821 * If not yet done, update fs_flags location and value of fs_sblockloc. 822 */ 823 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 824 fs->fs_flags = fs->fs_old_flags; 825 fs->fs_old_flags |= FS_FLAGS_UPDATED; 826 fs->fs_sblockloc = sblockloc; 827 } 828 /* 829 * If not yet done, update UFS1 superblock with new wider fields. 830 */ 831 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 832 fs->fs_maxbsize = fs->fs_bsize; 833 fs->fs_time = fs->fs_old_time; 834 fs->fs_size = fs->fs_old_size; 835 fs->fs_dsize = fs->fs_old_dsize; 836 fs->fs_csaddr = fs->fs_old_csaddr; 837 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 838 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 839 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 840 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 841 } 842 if (fs->fs_magic == FS_UFS1_MAGIC && 843 fs->fs_old_inodefmt < FS_44INODEFMT) { 844 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 845 fs->fs_qbmask = ~fs->fs_bmask; 846 fs->fs_qfmask = ~fs->fs_fmask; 847 } 848 if (fs->fs_magic == FS_UFS1_MAGIC) { 849 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 850 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 851 if (fs->fs_maxfilesize > maxfilesize) 852 fs->fs_maxfilesize = maxfilesize; 853 } 854 /* Compatibility for old filesystems */ 855 if (fs->fs_avgfilesize <= 0) 856 fs->fs_avgfilesize = AVFILESIZ; 857 if (fs->fs_avgfpdir <= 0) 858 fs->fs_avgfpdir = AFPDIR; 859 if (bigcgs) { 860 fs->fs_save_cgsize = fs->fs_cgsize; 861 fs->fs_cgsize = fs->fs_bsize; 862 } 863} 864 865/* 866 * Unwinding superblock updates for old filesystems. 867 * See ffs_oldfscompat_read above for details. 868 * 869 * XXX - Parts get retired eventually. 870 * Unfortunately new bits get added. 871 */ 872static void 873ffs_oldfscompat_write(fs, ump) 874 struct fs *fs; 875 struct ufsmount *ump; 876{ 877 878 /* 879 * Copy back UFS2 updated fields that UFS1 inspects. 880 */ 881 if (fs->fs_magic == FS_UFS1_MAGIC) { 882 fs->fs_old_time = fs->fs_time; 883 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 884 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 885 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 886 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 887 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 888 } 889 if (bigcgs) { 890 fs->fs_cgsize = fs->fs_save_cgsize; 891 fs->fs_save_cgsize = 0; 892 } 893} 894 895/* 896 * unmount system call 897 */ 898int 899ffs_unmount(mp, mntflags, td) 900 struct mount *mp; 901 int mntflags; 902 struct thread *td; 903{ 904 struct ufsmount *ump = VFSTOUFS(mp); 905 struct fs *fs; 906 int error, flags; 907 908 flags = 0; 909 if (mntflags & MNT_FORCE) { 910 flags |= FORCECLOSE; 911 } 912#ifdef UFS_EXTATTR 913 if ((error = ufs_extattr_stop(mp, td))) { 914 if (error != EOPNOTSUPP) 915 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 916 error); 917 } else { 918 ufs_extattr_uepm_destroy(&ump->um_extattr); 919 } 920#endif 921 if (mp->mnt_flag & MNT_SOFTDEP) { 922 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 923 return (error); 924 } else { 925 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 926 return (error); 927 } 928 fs = ump->um_fs; 929 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 930 printf("%s: unmount pending error: blocks %jd files %d\n", 931 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 932 fs->fs_pendinginodes); 933 fs->fs_pendingblocks = 0; 934 fs->fs_pendinginodes = 0; 935 } 936 if (fs->fs_ronly == 0) { 937 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 938 error = ffs_sbupdate(ump, MNT_WAIT); 939 if (error) { 940 fs->fs_clean = 0; 941 return (error); 942 } 943 } 944 vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0); 945 DROP_GIANT(); 946 g_topology_lock(); 947 g_wither_geom_close(ump->um_cp->geom, ENXIO); 948 g_topology_unlock(); 949 PICKUP_GIANT(); 950 vrele(ump->um_devvp); 951 free(fs->fs_csp, M_UFSMNT); 952 free(fs, M_UFSMNT); 953 free(ump, M_UFSMNT); 954 mp->mnt_data = (qaddr_t)0; 955 mp->mnt_flag &= ~MNT_LOCAL; 956 return (error); 957} 958 959/* 960 * Flush out all the files in a filesystem. 961 */ 962int 963ffs_flushfiles(mp, flags, td) 964 struct mount *mp; 965 int flags; 966 struct thread *td; 967{ 968 struct ufsmount *ump; 969 int error; 970 971 ump = VFSTOUFS(mp); 972#ifdef QUOTA 973 if (mp->mnt_flag & MNT_QUOTA) { 974 int i; 975 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 976 if (error) 977 return (error); 978 for (i = 0; i < MAXQUOTAS; i++) { 979 if (ump->um_quotas[i] == NULLVP) 980 continue; 981 quotaoff(td, mp, i); 982 } 983 /* 984 * Here we fall through to vflush again to ensure 985 * that we have gotten rid of all the system vnodes. 986 */ 987 } 988#endif 989 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 990 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 991 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 992 return (error); 993 ffs_snapshot_unmount(mp); 994 /* 995 * Here we fall through to vflush again to ensure 996 * that we have gotten rid of all the system vnodes. 997 */ 998 } 999 /* 1000 * Flush all the files. 1001 */ 1002 if ((error = vflush(mp, 0, flags, td)) != 0) 1003 return (error); 1004 /* 1005 * Flush filesystem metadata. 1006 */ 1007 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1008 error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td); 1009 VOP_UNLOCK(ump->um_devvp, 0, td); 1010 return (error); 1011} 1012 1013/* 1014 * Get filesystem statistics. 1015 */ 1016int 1017ffs_statfs(mp, sbp, td) 1018 struct mount *mp; 1019 struct statfs *sbp; 1020 struct thread *td; 1021{ 1022 struct ufsmount *ump; 1023 struct fs *fs; 1024 1025 ump = VFSTOUFS(mp); 1026 fs = ump->um_fs; 1027 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1028 panic("ffs_statfs"); 1029 sbp->f_version = STATFS_VERSION; 1030 sbp->f_bsize = fs->fs_fsize; 1031 sbp->f_iosize = fs->fs_bsize; 1032 sbp->f_blocks = fs->fs_dsize; 1033 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1034 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1035 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1036 dbtofsb(fs, fs->fs_pendingblocks); 1037 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1038 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1039 sbp->f_namemax = NAME_MAX; 1040 return (0); 1041} 1042 1043/* 1044 * Go through the disk queues to initiate sandbagged IO; 1045 * go through the inodes to write those that have been modified; 1046 * initiate the writing of the super block if it has been modified. 1047 * 1048 * Note: we are always called with the filesystem marked `MPBUSY'. 1049 */ 1050int 1051ffs_sync(mp, waitfor, cred, td) 1052 struct mount *mp; 1053 int waitfor; 1054 struct ucred *cred; 1055 struct thread *td; 1056{ 1057 struct vnode *nvp, *vp, *devvp; 1058 struct inode *ip; 1059 struct ufsmount *ump = VFSTOUFS(mp); 1060 struct fs *fs; 1061 int error, count, wait, lockreq, allerror = 0; 1062 struct bufobj *bo; 1063 1064 fs = ump->um_fs; 1065 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1066 printf("fs = %s\n", fs->fs_fsmnt); 1067 panic("ffs_sync: rofs mod"); 1068 } 1069 /* 1070 * Write back each (modified) inode. 1071 */ 1072 wait = 0; 1073 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1074 if (waitfor == MNT_WAIT) { 1075 wait = 1; 1076 lockreq = LK_EXCLUSIVE; 1077 } 1078 lockreq |= LK_INTERLOCK; 1079 MNT_ILOCK(mp); 1080loop: 1081 MNT_VNODE_FOREACH(vp, mp, nvp) { 1082 /* 1083 * Depend on the mntvnode_slock to keep things stable enough 1084 * for a quick test. Since there might be hundreds of 1085 * thousands of vnodes, we cannot afford even a subroutine 1086 * call unless there's a good chance that we have work to do. 1087 */ 1088 VI_LOCK(vp); 1089 if (vp->v_iflag & VI_XLOCK) { 1090 VI_UNLOCK(vp); 1091 continue; 1092 } 1093 ip = VTOI(vp); 1094 if (vp->v_type == VNON || ((ip->i_flag & 1095 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1096 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1097 VI_UNLOCK(vp); 1098 continue; 1099 } 1100 MNT_IUNLOCK(mp); 1101 if ((error = vget(vp, lockreq, td)) != 0) { 1102 MNT_ILOCK(mp); 1103 if (error == ENOENT) 1104 goto loop; 1105 continue; 1106 } 1107 if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0) 1108 allerror = error; 1109 VOP_UNLOCK(vp, 0, td); 1110 vrele(vp); 1111 MNT_ILOCK(mp); 1112 } 1113 MNT_IUNLOCK(mp); 1114 /* 1115 * Force stale filesystem control information to be flushed. 1116 */ 1117 if (waitfor == MNT_WAIT) { 1118 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1119 allerror = error; 1120 /* Flushed work items may create new vnodes to clean */ 1121 if (allerror == 0 && count) { 1122 MNT_ILOCK(mp); 1123 goto loop; 1124 } 1125 } 1126#ifdef QUOTA 1127 qsync(mp); 1128#endif 1129 devvp = ump->um_devvp; 1130 VI_LOCK(devvp); 1131 bo = &devvp->v_bufobj; 1132 if (waitfor != MNT_LAZY && 1133 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1134 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1135 if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0) 1136 allerror = error; 1137 VOP_UNLOCK(devvp, 0, td); 1138 if (allerror == 0 && waitfor == MNT_WAIT) { 1139 MNT_ILOCK(mp); 1140 goto loop; 1141 } 1142 } else 1143 VI_UNLOCK(devvp); 1144 /* 1145 * Write back modified superblock. 1146 */ 1147 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1148 allerror = error; 1149 return (allerror); 1150} 1151 1152int 1153ffs_vget(mp, ino, flags, vpp) 1154 struct mount *mp; 1155 ino_t ino; 1156 int flags; 1157 struct vnode **vpp; 1158{ 1159 struct thread *td = curthread; /* XXX */ 1160 struct fs *fs; 1161 struct inode *ip; 1162 struct ufsmount *ump; 1163 struct buf *bp; 1164 struct vnode *vp; 1165 struct cdev *dev; 1166 int error; 1167 1168 ump = VFSTOUFS(mp); 1169 dev = ump->um_dev; 1170 1171 /* 1172 * We do not lock vnode creation as it is believed to be too 1173 * expensive for such rare case as simultaneous creation of vnode 1174 * for same ino by different processes. We just allow them to race 1175 * and check later to decide who wins. Let the race begin! 1176 */ 1177 if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) 1178 return (error); 1179 if (*vpp != NULL) 1180 return (0); 1181 1182 /* 1183 * If this MALLOC() is performed after the getnewvnode() 1184 * it might block, leaving a vnode with a NULL v_data to be 1185 * found by ffs_sync() if a sync happens to fire right then, 1186 * which will cause a panic because ffs_sync() blindly 1187 * dereferences vp->v_data (as well it should). 1188 */ 1189 ip = uma_zalloc(uma_inode, M_WAITOK); 1190 1191 /* Allocate a new vnode/inode. */ 1192 error = getnewvnode("ufs", mp, &ffs_vnodeops, &vp); 1193 if (error) { 1194 *vpp = NULL; 1195 uma_zfree(uma_inode, ip); 1196 return (error); 1197 } 1198 bzero((caddr_t)ip, sizeof(struct inode)); 1199 /* 1200 * FFS supports recursive locking. 1201 */ 1202 fs = ump->um_fs; 1203 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1204 vp->v_data = ip; 1205 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1206 ip->i_vnode = vp; 1207 ip->i_ump = ump; 1208 ip->i_fs = fs; 1209 ip->i_dev = dev; 1210 ip->i_number = ino; 1211#ifdef QUOTA 1212 { 1213 int i; 1214 for (i = 0; i < MAXQUOTAS; i++) 1215 ip->i_dquot[i] = NODQUOT; 1216 } 1217#endif 1218 /* 1219 * Exclusively lock the vnode before adding to hash. Note, that we 1220 * must not release nor downgrade the lock (despite flags argument 1221 * says) till it is fully initialized. 1222 */ 1223 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td); 1224 1225 /* 1226 * Atomicaly (in terms of ufs_hash operations) check the hash for 1227 * duplicate of vnode being created and add it to the hash. If a 1228 * duplicate vnode was found, it will be vget()ed from hash for us. 1229 */ 1230 if ((error = ufs_ihashins(ip, flags, vpp)) != 0) { 1231 vput(vp); 1232 *vpp = NULL; 1233 return (error); 1234 } 1235 1236 /* We lost the race, then throw away our vnode and return existing */ 1237 if (*vpp != NULL) { 1238 vput(vp); 1239 return (0); 1240 } 1241 1242 /* Read in the disk contents for the inode, copy into the inode. */ 1243 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1244 (int)fs->fs_bsize, NOCRED, &bp); 1245 if (error) { 1246 /* 1247 * The inode does not contain anything useful, so it would 1248 * be misleading to leave it on its hash chain. With mode 1249 * still zero, it will be unlinked and returned to the free 1250 * list by vput(). 1251 */ 1252 brelse(bp); 1253 vput(vp); 1254 *vpp = NULL; 1255 return (error); 1256 } 1257 if (ip->i_ump->um_fstype == UFS1) 1258 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1259 else 1260 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1261 ffs_load_inode(bp, ip, fs, ino); 1262 if (DOINGSOFTDEP(vp)) 1263 softdep_load_inodeblock(ip); 1264 else 1265 ip->i_effnlink = ip->i_nlink; 1266 bqrelse(bp); 1267 1268 /* 1269 * Initialize the vnode from the inode, check for aliases. 1270 * Note that the underlying vnode may have changed. 1271 */ 1272 error = ufs_vinit(mp, &ffs_fifoops, &vp); 1273 if (error) { 1274 vput(vp); 1275 *vpp = NULL; 1276 return (error); 1277 } 1278 /* 1279 * Finish inode initialization. 1280 */ 1281 VREF(ip->i_devvp); 1282 /* 1283 * Set up a generation number for this inode if it does not 1284 * already have one. This should only happen on old filesystems. 1285 */ 1286 if (ip->i_gen == 0) { 1287 ip->i_gen = arc4random() / 2 + 1; 1288 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1289 ip->i_flag |= IN_MODIFIED; 1290 DIP_SET(ip, i_gen, ip->i_gen); 1291 } 1292 } 1293 /* 1294 * Ensure that uid and gid are correct. This is a temporary 1295 * fix until fsck has been changed to do the update. 1296 */ 1297 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1298 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1299 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1300 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1301 } /* XXX */ 1302 1303#ifdef MAC 1304 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1305 /* 1306 * If this vnode is already allocated, and we're running 1307 * multi-label, attempt to perform a label association 1308 * from the extended attributes on the inode. 1309 */ 1310 error = mac_associate_vnode_extattr(mp, vp); 1311 if (error) { 1312 /* ufs_inactive will release ip->i_devvp ref. */ 1313 vput(vp); 1314 *vpp = NULL; 1315 return (error); 1316 } 1317 } 1318#endif 1319 1320 *vpp = vp; 1321 return (0); 1322} 1323 1324/* 1325 * File handle to vnode 1326 * 1327 * Have to be really careful about stale file handles: 1328 * - check that the inode number is valid 1329 * - call ffs_vget() to get the locked inode 1330 * - check for an unallocated inode (i_mode == 0) 1331 * - check that the given client host has export rights and return 1332 * those rights via. exflagsp and credanonp 1333 */ 1334int 1335ffs_fhtovp(mp, fhp, vpp) 1336 struct mount *mp; 1337 struct fid *fhp; 1338 struct vnode **vpp; 1339{ 1340 struct ufid *ufhp; 1341 struct fs *fs; 1342 1343 ufhp = (struct ufid *)fhp; 1344 fs = VFSTOUFS(mp)->um_fs; 1345 if (ufhp->ufid_ino < ROOTINO || 1346 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1347 return (ESTALE); 1348 return (ufs_fhtovp(mp, ufhp, vpp)); 1349} 1350 1351/* 1352 * Vnode pointer to File handle 1353 */ 1354/* ARGSUSED */ 1355int 1356ffs_vptofh(vp, fhp) 1357 struct vnode *vp; 1358 struct fid *fhp; 1359{ 1360 struct inode *ip; 1361 struct ufid *ufhp; 1362 1363 ip = VTOI(vp); 1364 ufhp = (struct ufid *)fhp; 1365 ufhp->ufid_len = sizeof(struct ufid); 1366 ufhp->ufid_ino = ip->i_number; 1367 ufhp->ufid_gen = ip->i_gen; 1368 return (0); 1369} 1370 1371/* 1372 * Initialize the filesystem. 1373 */ 1374static int 1375ffs_init(vfsp) 1376 struct vfsconf *vfsp; 1377{ 1378 1379 softdep_initialize(); 1380 return (ufs_init(vfsp)); 1381} 1382 1383/* 1384 * Undo the work of ffs_init(). 1385 */ 1386static int 1387ffs_uninit(vfsp) 1388 struct vfsconf *vfsp; 1389{ 1390 int ret; 1391 1392 ret = ufs_uninit(vfsp); 1393 softdep_uninitialize(); 1394 return (ret); 1395} 1396 1397/* 1398 * Write a superblock and associated information back to disk. 1399 */ 1400static int 1401ffs_sbupdate(mp, waitfor) 1402 struct ufsmount *mp; 1403 int waitfor; 1404{ 1405 struct fs *fs = mp->um_fs; 1406 struct buf *bp; 1407 int blks; 1408 void *space; 1409 int i, size, error, allerror = 0; 1410 1411 if (fs->fs_ronly == 1 && 1412 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1413 (MNT_RDONLY | MNT_UPDATE)) 1414 panic("ffs_sbupdate: write read-only filesystem"); 1415 /* 1416 * First write back the summary information. 1417 */ 1418 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1419 space = fs->fs_csp; 1420 for (i = 0; i < blks; i += fs->fs_frag) { 1421 size = fs->fs_bsize; 1422 if (i + fs->fs_frag > blks) 1423 size = (blks - i) * fs->fs_fsize; 1424 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1425 size, 0, 0, 0); 1426 bcopy(space, bp->b_data, (u_int)size); 1427 space = (char *)space + size; 1428 if (waitfor != MNT_WAIT) 1429 bawrite(bp); 1430 else if ((error = bwrite(bp)) != 0) 1431 allerror = error; 1432 } 1433 /* 1434 * Now write back the superblock itself. If any errors occurred 1435 * up to this point, then fail so that the superblock avoids 1436 * being written out as clean. 1437 */ 1438 if (allerror) 1439 return (allerror); 1440 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1441 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1442 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1443 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1444 fs->fs_sblockloc = SBLOCK_UFS1; 1445 } 1446 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1447 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1448 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1449 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1450 fs->fs_sblockloc = SBLOCK_UFS2; 1451 } 1452 bp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1453 0, 0, 0); 1454 fs->fs_fmod = 0; 1455 fs->fs_time = time_second; 1456 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1457 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1458 if (waitfor != MNT_WAIT) 1459 bawrite(bp); 1460 else if ((error = bwrite(bp)) != 0) 1461 allerror = error; 1462 return (allerror); 1463} 1464 1465static int 1466ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1467 int attrnamespace, const char *attrname, struct thread *td) 1468{ 1469 1470#ifdef UFS_EXTATTR 1471 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1472 attrname, td)); 1473#else 1474 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1475 attrname, td)); 1476#endif 1477} 1478 1479static void 1480ffs_ifree(struct ufsmount *ump, struct inode *ip) 1481{ 1482 1483 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1484 uma_zfree(uma_ufs1, ip->i_din1); 1485 else if (ip->i_din2 != NULL) 1486 uma_zfree(uma_ufs2, ip->i_din2); 1487 uma_zfree(uma_inode, ip); 1488} 1489 1490static void 1491ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1492{ 1493 1494#ifdef SOFTUPDATES 1495 if (bp->b_iocmd == BIO_WRITE && softdep_disk_prewrite(bp)) 1496 return; 1497#endif 1498 g_vfs_strategy(bo, bp); 1499} 1500