ffs_vfsops.c revision 120793
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/ufs/ffs/ffs_vfsops.c 120793 2003-10-05 07:16:45Z jeff $"); 38 39#include "opt_mac.h" 40#include "opt_quota.h" 41#include "opt_ufs.h" 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/namei.h> 46#include <sys/proc.h> 47#include <sys/kernel.h> 48#include <sys/mac.h> 49#include <sys/vnode.h> 50#include <sys/mount.h> 51#include <sys/bio.h> 52#include <sys/buf.h> 53#include <sys/conf.h> 54#include <sys/fcntl.h> 55#include <sys/disk.h> 56#include <sys/malloc.h> 57#include <sys/mutex.h> 58 59#include <ufs/ufs/extattr.h> 60#include <ufs/ufs/quota.h> 61#include <ufs/ufs/ufsmount.h> 62#include <ufs/ufs/inode.h> 63#include <ufs/ufs/ufs_extern.h> 64 65#include <ufs/ffs/fs.h> 66#include <ufs/ffs/ffs_extern.h> 67 68#include <vm/vm.h> 69#include <vm/uma.h> 70#include <vm/vm_page.h> 71 72uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 73 74static int ffs_sbupdate(struct ufsmount *, int); 75 int ffs_reload(struct mount *,struct ucred *,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; 84 85static struct vfsops ufs_vfsops = { 86 .vfs_extattrctl = ffs_extattrctl, 87 .vfs_fhtovp = ffs_fhtovp, 88 .vfs_init = ffs_init, 89 .vfs_mount = ffs_mount, 90 .vfs_quotactl = ufs_quotactl, 91 .vfs_root = ufs_root, 92 .vfs_start = ufs_start, 93 .vfs_statfs = ffs_statfs, 94 .vfs_sync = ffs_sync, 95 .vfs_uninit = ffs_uninit, 96 .vfs_unmount = ffs_unmount, 97 .vfs_vget = ffs_vget, 98 .vfs_vptofh = ffs_vptofh, 99}; 100 101VFS_SET(ufs_vfsops, ufs, 0); 102 103/* 104 * ffs_mount 105 * 106 * Called when mounting local physical media 107 * 108 * PARAMETERS: 109 * mountroot 110 * mp mount point structure 111 * path NULL (flag for root mount!!!) 112 * data <unused> 113 * ndp <unused> 114 * p process (user credentials check [statfs]) 115 * 116 * mount 117 * mp mount point structure 118 * path path to mount point 119 * data pointer to argument struct in user space 120 * ndp mount point namei() return (used for 121 * credentials on reload), reused to look 122 * up block device. 123 * p process (user credentials check) 124 * 125 * RETURNS: 0 Success 126 * !0 error number (errno.h) 127 * 128 * LOCK STATE: 129 * 130 * ENTRY 131 * mount point is locked 132 * EXIT 133 * mount point is locked 134 * 135 * NOTES: 136 * A NULL path can be used for a flag since the mount 137 * system call will fail with EFAULT in copyinstr in 138 * namei() if it is a genuine NULL from the user. 139 */ 140int 141ffs_mount(mp, path, data, ndp, td) 142 struct mount *mp; /* mount struct pointer*/ 143 char *path; /* path to mount point*/ 144 caddr_t data; /* arguments to FS specific mount*/ 145 struct nameidata *ndp; /* mount point credentials*/ 146 struct thread *td; /* process requesting mount*/ 147{ 148 size_t size; 149 struct vnode *devvp; 150 struct ufs_args args; 151 struct ufsmount *ump = 0; 152 struct fs *fs; 153 int error, flags; 154 mode_t accessmode; 155 156 if (uma_inode == NULL) { 157 uma_inode = uma_zcreate("FFS inode", 158 sizeof(struct inode), NULL, NULL, NULL, NULL, 159 UMA_ALIGN_PTR, 0); 160 uma_ufs1 = uma_zcreate("FFS1 dinode", 161 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 162 UMA_ALIGN_PTR, 0); 163 uma_ufs2 = uma_zcreate("FFS2 dinode", 164 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 165 UMA_ALIGN_PTR, 0); 166 } 167 /* 168 * Use NULL path to indicate we are mounting the root filesystem. 169 */ 170 if (path == NULL) { 171 if ((error = bdevvp(rootdev, &rootvp))) { 172 printf("ffs_mountroot: can't find rootvp\n"); 173 return (error); 174 } 175 176 if ((error = ffs_mountfs(rootvp, mp, td)) != 0) 177 return (error); 178 (void)VFS_STATFS(mp, &mp->mnt_stat, td); 179 return (0); 180 } 181 182 /* 183 * Mounting non-root filesystem or updating a filesystem 184 */ 185 if ((error = copyin(data, (caddr_t)&args, sizeof(struct ufs_args)))!= 0) 186 return (error); 187 188 /* 189 * If updating, check whether changing from read-only to 190 * read/write; if there is no device name, that's all we do. 191 */ 192 if (mp->mnt_flag & MNT_UPDATE) { 193 ump = VFSTOUFS(mp); 194 fs = ump->um_fs; 195 devvp = ump->um_devvp; 196 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 197 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 198 return (error); 199 /* 200 * Flush any dirty data. 201 */ 202 if ((error = VFS_SYNC(mp, MNT_WAIT, 203 td->td_ucred, td)) != 0) { 204 vn_finished_write(mp); 205 return (error); 206 } 207 /* 208 * Check for and optionally get rid of files open 209 * for writing. 210 */ 211 flags = WRITECLOSE; 212 if (mp->mnt_flag & MNT_FORCE) 213 flags |= FORCECLOSE; 214 if (mp->mnt_flag & MNT_SOFTDEP) { 215 error = softdep_flushfiles(mp, flags, td); 216 } else { 217 error = ffs_flushfiles(mp, flags, td); 218 } 219 if (error) { 220 vn_finished_write(mp); 221 return (error); 222 } 223 if (fs->fs_pendingblocks != 0 || 224 fs->fs_pendinginodes != 0) { 225 printf("%s: %s: blocks %jd files %d\n", 226 fs->fs_fsmnt, "update error", 227 (intmax_t)fs->fs_pendingblocks, 228 fs->fs_pendinginodes); 229 fs->fs_pendingblocks = 0; 230 fs->fs_pendinginodes = 0; 231 } 232 fs->fs_ronly = 1; 233 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 234 fs->fs_clean = 1; 235 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 236 fs->fs_ronly = 0; 237 fs->fs_clean = 0; 238 vn_finished_write(mp); 239 return (error); 240 } 241 vn_finished_write(mp); 242 } 243 if ((mp->mnt_flag & MNT_RELOAD) && 244 (error = ffs_reload(mp, ndp->ni_cnd.cn_cred, td)) != 0) 245 return (error); 246 if (fs->fs_ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 247 /* 248 * If upgrade to read-write by non-root, then verify 249 * that user has necessary permissions on the device. 250 */ 251 if (suser(td)) { 252 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 253 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 254 td->td_ucred, td)) != 0) { 255 VOP_UNLOCK(devvp, 0, td); 256 return (error); 257 } 258 VOP_UNLOCK(devvp, 0, td); 259 } 260 fs->fs_flags &= ~FS_UNCLEAN; 261 if (fs->fs_clean == 0) { 262 fs->fs_flags |= FS_UNCLEAN; 263 if ((mp->mnt_flag & MNT_FORCE) || 264 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 265 (fs->fs_flags & FS_DOSOFTDEP))) { 266 printf("WARNING: %s was not %s\n", 267 fs->fs_fsmnt, "properly dismounted"); 268 } else { 269 printf( 270"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 271 fs->fs_fsmnt); 272 return (EPERM); 273 } 274 } 275 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 276 return (error); 277 fs->fs_ronly = 0; 278 fs->fs_clean = 0; 279 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 280 vn_finished_write(mp); 281 return (error); 282 } 283 /* check to see if we need to start softdep */ 284 if ((fs->fs_flags & FS_DOSOFTDEP) && 285 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 286 vn_finished_write(mp); 287 return (error); 288 } 289 if (fs->fs_snapinum[0] != 0) 290 ffs_snapshot_mount(mp); 291 vn_finished_write(mp); 292 } 293 /* 294 * Soft updates is incompatible with "async", 295 * so if we are doing softupdates stop the user 296 * from setting the async flag in an update. 297 * Softdep_mount() clears it in an initial mount 298 * or ro->rw remount. 299 */ 300 if (mp->mnt_flag & MNT_SOFTDEP) 301 mp->mnt_flag &= ~MNT_ASYNC; 302 /* 303 * If not updating name, process export requests. 304 */ 305 if (args.fspec == 0) 306 return (vfs_export(mp, &args.export)); 307 /* 308 * If this is a snapshot request, take the snapshot. 309 */ 310 if (mp->mnt_flag & MNT_SNAPSHOT) 311 return (ffs_snapshot(mp, args.fspec)); 312 } 313 314 /* 315 * Not an update, or updating the name: look up the name 316 * and verify that it refers to a sensible block device. 317 */ 318 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); 319 if ((error = namei(ndp)) != 0) 320 return (error); 321 NDFREE(ndp, NDF_ONLY_PNBUF); 322 devvp = ndp->ni_vp; 323 if (!vn_isdisk(devvp, &error)) { 324 vrele(devvp); 325 return (error); 326 } 327 328 /* 329 * If mount by non-root, then verify that user has necessary 330 * permissions on the device. 331 */ 332 if (suser(td)) { 333 accessmode = VREAD; 334 if ((mp->mnt_flag & MNT_RDONLY) == 0) 335 accessmode |= VWRITE; 336 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 337 if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){ 338 vput(devvp); 339 return (error); 340 } 341 VOP_UNLOCK(devvp, 0, td); 342 } 343 344 if (mp->mnt_flag & MNT_UPDATE) { 345 /* 346 * Update only 347 * 348 * If it's not the same vnode, or at least the same device 349 * then it's not correct. 350 */ 351 352 if (devvp != ump->um_devvp && 353 devvp->v_rdev != ump->um_devvp->v_rdev) 354 error = EINVAL; /* needs translation */ 355 vrele(devvp); 356 if (error) 357 return (error); 358 } else { 359 /* 360 * New mount 361 * 362 * We need the name for the mount point (also used for 363 * "last mounted on") copied in. If an error occurs, 364 * the mount point is discarded by the upper level code. 365 * Note that vfs_mount() populates f_mntonname for us. 366 */ 367 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 368 vrele(devvp); 369 return (error); 370 } 371 } 372 /* 373 * Save "mounted from" device name info for mount point (NULL pad). 374 */ 375 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 376 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 377 /* 378 * Initialize filesystem stat information in mount struct. 379 */ 380 (void)VFS_STATFS(mp, &mp->mnt_stat, td); 381 return (0); 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 */ 397int 398ffs_reload(mp, cred, td) 399 struct mount *mp; 400 struct ucred *cred; 401 struct thread *td; 402{ 403 struct vnode *vp, *nvp, *devvp; 404 struct inode *ip; 405 void *space; 406 struct buf *bp; 407 struct fs *fs, *newfs; 408 ufs2_daddr_t sblockloc; 409 int i, blks, size, error; 410 int32_t *lp; 411 412 if ((mp->mnt_flag & MNT_RDONLY) == 0) 413 return (EINVAL); 414 /* 415 * Step 1: invalidate all cached meta-data. 416 */ 417 devvp = VFSTOUFS(mp)->um_devvp; 418 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 419 error = vinvalbuf(devvp, 0, cred, td, 0, 0); 420 VOP_UNLOCK(devvp, 0, td); 421 if (error) 422 panic("ffs_reload: dirty1"); 423 424 /* 425 * Only VMIO the backing device if the backing device is a real 426 * block device. 427 */ 428 if (vn_isdisk(devvp, NULL)) { 429 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 430 vfs_object_create(devvp, td, td->td_ucred); 431 VOP_UNLOCK(devvp, 0, td); 432 } 433 434 /* 435 * Step 2: re-read superblock from disk. 436 */ 437 fs = VFSTOUFS(mp)->um_fs; 438 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 439 NOCRED, &bp)) != 0) 440 return (error); 441 newfs = (struct fs *)bp->b_data; 442 if ((newfs->fs_magic != FS_UFS1_MAGIC && 443 newfs->fs_magic != FS_UFS2_MAGIC) || 444 newfs->fs_bsize > MAXBSIZE || 445 newfs->fs_bsize < sizeof(struct fs)) { 446 brelse(bp); 447 return (EIO); /* XXX needs translation */ 448 } 449 /* 450 * Copy pointer fields back into superblock before copying in XXX 451 * new superblock. These should really be in the ufsmount. XXX 452 * Note that important parameters (eg fs_ncg) are unchanged. 453 */ 454 newfs->fs_csp = fs->fs_csp; 455 newfs->fs_maxcluster = fs->fs_maxcluster; 456 newfs->fs_contigdirs = fs->fs_contigdirs; 457 newfs->fs_active = fs->fs_active; 458 sblockloc = fs->fs_sblockloc; 459 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 460 brelse(bp); 461 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 462 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 463 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 464 printf("%s: reload pending error: blocks %jd files %d\n", 465 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 466 fs->fs_pendinginodes); 467 fs->fs_pendingblocks = 0; 468 fs->fs_pendinginodes = 0; 469 } 470 471 /* 472 * Step 3: re-read summary information from disk. 473 */ 474 blks = howmany(fs->fs_cssize, fs->fs_fsize); 475 space = fs->fs_csp; 476 for (i = 0; i < blks; i += fs->fs_frag) { 477 size = fs->fs_bsize; 478 if (i + fs->fs_frag > blks) 479 size = (blks - i) * fs->fs_fsize; 480 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 481 NOCRED, &bp); 482 if (error) 483 return (error); 484 bcopy(bp->b_data, space, (u_int)size); 485 space = (char *)space + size; 486 brelse(bp); 487 } 488 /* 489 * We no longer know anything about clusters per cylinder group. 490 */ 491 if (fs->fs_contigsumsize > 0) { 492 lp = fs->fs_maxcluster; 493 for (i = 0; i < fs->fs_ncg; i++) 494 *lp++ = fs->fs_contigsumsize; 495 } 496 497loop: 498 mtx_lock(&mntvnode_mtx); 499 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 500 if (vp->v_mount != mp) { 501 mtx_unlock(&mntvnode_mtx); 502 goto loop; 503 } 504 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 505 VI_LOCK(vp); 506 if (vp->v_iflag & VI_XLOCK) { 507 VI_UNLOCK(vp); 508 continue; 509 } 510 mtx_unlock(&mntvnode_mtx); 511 /* 512 * Step 4: invalidate all inactive vnodes. 513 */ 514 if (vp->v_usecount == 0) { 515 vgonel(vp, td); 516 goto loop; 517 } 518 /* 519 * Step 5: invalidate all cached file data. 520 */ 521 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 522 goto loop; 523 } 524 if (vinvalbuf(vp, 0, cred, td, 0, 0)) 525 panic("ffs_reload: dirty2"); 526 /* 527 * Step 6: re-read inode data for all active vnodes. 528 */ 529 ip = VTOI(vp); 530 error = 531 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 532 (int)fs->fs_bsize, NOCRED, &bp); 533 if (error) { 534 vput(vp); 535 return (error); 536 } 537 ffs_load_inode(bp, ip, fs, ip->i_number); 538 ip->i_effnlink = ip->i_nlink; 539 brelse(bp); 540 vput(vp); 541 mtx_lock(&mntvnode_mtx); 542 } 543 mtx_unlock(&mntvnode_mtx); 544 return (0); 545} 546 547/* 548 * Possible superblock locations ordered from most to least likely. 549 */ 550static int sblock_try[] = SBLOCKSEARCH; 551 552/* 553 * Common code for mount and mountroot 554 */ 555static int 556ffs_mountfs(devvp, mp, td) 557 struct vnode *devvp; 558 struct mount *mp; 559 struct thread *td; 560{ 561 struct ufsmount *ump; 562 struct buf *bp; 563 struct fs *fs; 564 dev_t dev; 565 void *space; 566 ufs2_daddr_t sblockloc; 567 int error, i, blks, size, ronly; 568 int32_t *lp; 569 struct ucred *cred; 570 size_t strsize; 571 int ncount; 572 573 dev = devvp->v_rdev; 574 cred = td ? td->td_ucred : NOCRED; 575 /* 576 * Disallow multiple mounts of the same device. 577 * Disallow mounting of a device that is currently in use 578 * (except for root, which might share swap device for miniroot). 579 * Flush out any old buffers remaining from a previous use. 580 */ 581 error = vfs_mountedon(devvp); 582 if (error) 583 return (error); 584 ncount = vcount(devvp); 585 586 if (ncount > 1 && devvp != rootvp) 587 return (EBUSY); 588 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 589 error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0); 590 VOP_UNLOCK(devvp, 0, td); 591 if (error) 592 return (error); 593 594 /* 595 * Only VMIO the backing device if the backing device is a real 596 * block device. 597 * Note that it is optional that the backing device be VMIOed. This 598 * increases the opportunity for metadata caching. 599 */ 600 if (vn_isdisk(devvp, NULL)) { 601 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 602 vfs_object_create(devvp, td, cred); 603 VOP_UNLOCK(devvp, 0, td); 604 } 605 606 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 607 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 608 /* 609 * XXX: We don't re-VOP_OPEN in FREAD|FWRITE mode if the filesystem 610 * XXX: is subsequently remounted, so open it FREAD|FWRITE from the 611 * XXX: start to avoid getting trashed later on. 612 */ 613#ifdef notyet 614 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td, -1); 615#else 616 error = VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, td, -1); 617#endif 618 VOP_UNLOCK(devvp, 0, td); 619 if (error) 620 return (error); 621 if (devvp->v_rdev->si_iosize_max != 0) 622 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 623 if (mp->mnt_iosize_max > MAXPHYS) 624 mp->mnt_iosize_max = MAXPHYS; 625 626 bp = NULL; 627 ump = NULL; 628 fs = NULL; 629 sblockloc = 0; 630 /* 631 * Try reading the superblock in each of its possible locations. 632 */ 633 for (i = 0; sblock_try[i] != -1; i++) { 634 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 635 cred, &bp)) != 0) 636 goto out; 637 fs = (struct fs *)bp->b_data; 638 sblockloc = sblock_try[i]; 639 if ((fs->fs_magic == FS_UFS1_MAGIC || 640 (fs->fs_magic == FS_UFS2_MAGIC && 641 (fs->fs_sblockloc == sblockloc || 642 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 643 fs->fs_bsize <= MAXBSIZE && 644 fs->fs_bsize >= sizeof(struct fs)) 645 break; 646 brelse(bp); 647 bp = NULL; 648 } 649 if (sblock_try[i] == -1) { 650 error = EINVAL; /* XXX needs translation */ 651 goto out; 652 } 653 fs->fs_fmod = 0; 654 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 655 fs->fs_flags &= ~FS_UNCLEAN; 656 if (fs->fs_clean == 0) { 657 fs->fs_flags |= FS_UNCLEAN; 658 if (ronly || (mp->mnt_flag & MNT_FORCE) || 659 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 660 (fs->fs_flags & FS_DOSOFTDEP))) { 661 printf( 662"WARNING: %s was not properly dismounted\n", 663 fs->fs_fsmnt); 664 } else { 665 printf( 666"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 667 fs->fs_fsmnt); 668 error = EPERM; 669 goto out; 670 } 671 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 672 (mp->mnt_flag & MNT_FORCE)) { 673 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 674 (intmax_t)fs->fs_pendingblocks, 675 fs->fs_pendinginodes); 676 fs->fs_pendingblocks = 0; 677 fs->fs_pendinginodes = 0; 678 } 679 } 680 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 681 printf("%s: mount pending error: blocks %jd files %d\n", 682 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 683 fs->fs_pendinginodes); 684 fs->fs_pendingblocks = 0; 685 fs->fs_pendinginodes = 0; 686 } 687 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 688 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 689 M_WAITOK); 690 if (fs->fs_magic == FS_UFS1_MAGIC) { 691 ump->um_fstype = UFS1; 692 ump->um_balloc = ffs_balloc_ufs1; 693 } else { 694 ump->um_fstype = UFS2; 695 ump->um_balloc = ffs_balloc_ufs2; 696 } 697 ump->um_blkatoff = ffs_blkatoff; 698 ump->um_truncate = ffs_truncate; 699 ump->um_update = ffs_update; 700 ump->um_valloc = ffs_valloc; 701 ump->um_vfree = ffs_vfree; 702 ump->um_ifree = ffs_ifree; 703 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 704 if (fs->fs_sbsize < SBLOCKSIZE) 705 bp->b_flags |= B_INVAL | B_NOCACHE; 706 brelse(bp); 707 bp = NULL; 708 fs = ump->um_fs; 709 ffs_oldfscompat_read(fs, ump, sblockloc); 710 fs->fs_ronly = ronly; 711 size = fs->fs_cssize; 712 blks = howmany(size, fs->fs_fsize); 713 if (fs->fs_contigsumsize > 0) 714 size += fs->fs_ncg * sizeof(int32_t); 715 size += fs->fs_ncg * sizeof(u_int8_t); 716 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 717 fs->fs_csp = space; 718 for (i = 0; i < blks; i += fs->fs_frag) { 719 size = fs->fs_bsize; 720 if (i + fs->fs_frag > blks) 721 size = (blks - i) * fs->fs_fsize; 722 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 723 cred, &bp)) != 0) { 724 free(fs->fs_csp, M_UFSMNT); 725 goto out; 726 } 727 bcopy(bp->b_data, space, (u_int)size); 728 space = (char *)space + size; 729 brelse(bp); 730 bp = NULL; 731 } 732 if (fs->fs_contigsumsize > 0) { 733 fs->fs_maxcluster = lp = space; 734 for (i = 0; i < fs->fs_ncg; i++) 735 *lp++ = fs->fs_contigsumsize; 736 space = lp; 737 } 738 size = fs->fs_ncg * sizeof(u_int8_t); 739 fs->fs_contigdirs = (u_int8_t *)space; 740 bzero(fs->fs_contigdirs, size); 741 fs->fs_active = NULL; 742 mp->mnt_data = (qaddr_t)ump; 743 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 744 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 745 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 746 vfs_getvfs(&mp->mnt_stat.f_fsid)) 747 vfs_getnewfsid(mp); 748 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 749 mp->mnt_flag |= MNT_LOCAL; 750 if ((fs->fs_flags & FS_MULTILABEL) != 0) 751#ifdef MAC 752 mp->mnt_flag |= MNT_MULTILABEL; 753#else 754 printf( 755"WARNING: %s: multilabel flag on fs but no MAC support\n", 756 fs->fs_fsmnt); 757#endif 758 if ((fs->fs_flags & FS_ACLS) != 0) 759#ifdef UFS_ACL 760 mp->mnt_flag |= MNT_ACLS; 761#else 762 printf( 763"WARNING: %s: ACLs flag on fs but no ACLs support\n", 764 fs->fs_fsmnt); 765#endif 766 ump->um_mountp = mp; 767 ump->um_dev = dev; 768 ump->um_devvp = devvp; 769 ump->um_nindir = fs->fs_nindir; 770 ump->um_bptrtodb = fs->fs_fsbtodb; 771 ump->um_seqinc = fs->fs_frag; 772 for (i = 0; i < MAXQUOTAS; i++) 773 ump->um_quotas[i] = NULLVP; 774#ifdef UFS_EXTATTR 775 ufs_extattr_uepm_init(&ump->um_extattr); 776#endif 777 devvp->v_rdev->si_mountpoint = mp; 778 779 /* 780 * Set FS local "last mounted on" information (NULL pad) 781 */ 782 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 783 fs->fs_fsmnt, /* copy area*/ 784 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 785 &strsize); /* real size*/ 786 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 787 788 if( mp->mnt_flag & MNT_ROOTFS) { 789 /* 790 * Root mount; update timestamp in mount structure. 791 * this will be used by the common root mount code 792 * to update the system clock. 793 */ 794 mp->mnt_time = fs->fs_time; 795 } 796 797 if (ronly == 0) { 798 if ((fs->fs_flags & FS_DOSOFTDEP) && 799 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 800 free(fs->fs_csp, M_UFSMNT); 801 goto out; 802 } 803 if (fs->fs_snapinum[0] != 0) 804 ffs_snapshot_mount(mp); 805 fs->fs_fmod = 1; 806 fs->fs_clean = 0; 807 (void) ffs_sbupdate(ump, MNT_WAIT); 808 } 809#ifdef UFS_EXTATTR 810#ifdef UFS_EXTATTR_AUTOSTART 811 /* 812 * 813 * Auto-starting does the following: 814 * - check for /.attribute in the fs, and extattr_start if so 815 * - for each file in .attribute, enable that file with 816 * an attribute of the same name. 817 * Not clear how to report errors -- probably eat them. 818 * This would all happen while the filesystem was busy/not 819 * available, so would effectively be "atomic". 820 */ 821 (void) ufs_extattr_autostart(mp, td); 822#endif /* !UFS_EXTATTR_AUTOSTART */ 823#endif /* !UFS_EXTATTR */ 824 return (0); 825out: 826 devvp->v_rdev->si_mountpoint = NULL; 827 if (bp) 828 brelse(bp); 829 /* XXX: see comment above VOP_OPEN */ 830#ifdef notyet 831 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, td); 832#else 833 (void)VOP_CLOSE(devvp, FREAD|FWRITE, cred, td); 834#endif 835 if (ump) { 836 free(ump->um_fs, M_UFSMNT); 837 free(ump, M_UFSMNT); 838 mp->mnt_data = (qaddr_t)0; 839 } 840 return (error); 841} 842 843#include <sys/sysctl.h> 844int bigcgs = 0; 845SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 846 847/* 848 * Sanity checks for loading old filesystem superblocks. 849 * See ffs_oldfscompat_write below for unwound actions. 850 * 851 * XXX - Parts get retired eventually. 852 * Unfortunately new bits get added. 853 */ 854static void 855ffs_oldfscompat_read(fs, ump, sblockloc) 856 struct fs *fs; 857 struct ufsmount *ump; 858 ufs2_daddr_t sblockloc; 859{ 860 off_t maxfilesize; 861 862 /* 863 * If not yet done, update fs_flags location and value of fs_sblockloc. 864 */ 865 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 866 fs->fs_flags = fs->fs_old_flags; 867 fs->fs_old_flags |= FS_FLAGS_UPDATED; 868 fs->fs_sblockloc = sblockloc; 869 } 870 /* 871 * If not yet done, update UFS1 superblock with new wider fields. 872 */ 873 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 874 fs->fs_maxbsize = fs->fs_bsize; 875 fs->fs_time = fs->fs_old_time; 876 fs->fs_size = fs->fs_old_size; 877 fs->fs_dsize = fs->fs_old_dsize; 878 fs->fs_csaddr = fs->fs_old_csaddr; 879 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 880 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 881 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 882 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 883 } 884 if (fs->fs_magic == FS_UFS1_MAGIC && 885 fs->fs_old_inodefmt < FS_44INODEFMT) { 886 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 887 fs->fs_qbmask = ~fs->fs_bmask; 888 fs->fs_qfmask = ~fs->fs_fmask; 889 } 890 if (fs->fs_magic == FS_UFS1_MAGIC) { 891 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 892 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 893 if (fs->fs_maxfilesize > maxfilesize) 894 fs->fs_maxfilesize = maxfilesize; 895 } 896 /* Compatibility for old filesystems */ 897 if (fs->fs_avgfilesize <= 0) 898 fs->fs_avgfilesize = AVFILESIZ; 899 if (fs->fs_avgfpdir <= 0) 900 fs->fs_avgfpdir = AFPDIR; 901 if (bigcgs) { 902 fs->fs_save_cgsize = fs->fs_cgsize; 903 fs->fs_cgsize = fs->fs_bsize; 904 } 905} 906 907/* 908 * Unwinding superblock updates for old filesystems. 909 * See ffs_oldfscompat_read above for details. 910 * 911 * XXX - Parts get retired eventually. 912 * Unfortunately new bits get added. 913 */ 914static void 915ffs_oldfscompat_write(fs, ump) 916 struct fs *fs; 917 struct ufsmount *ump; 918{ 919 920 /* 921 * Copy back UFS2 updated fields that UFS1 inspects. 922 */ 923 if (fs->fs_magic == FS_UFS1_MAGIC) { 924 fs->fs_old_time = fs->fs_time; 925 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 926 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 927 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 928 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 929 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 930 } 931 if (bigcgs) { 932 fs->fs_cgsize = fs->fs_save_cgsize; 933 fs->fs_save_cgsize = 0; 934 } 935} 936 937/* 938 * unmount system call 939 */ 940int 941ffs_unmount(mp, mntflags, td) 942 struct mount *mp; 943 int mntflags; 944 struct thread *td; 945{ 946 struct ufsmount *ump = VFSTOUFS(mp); 947 struct fs *fs; 948 int error, flags; 949 950 flags = 0; 951 if (mntflags & MNT_FORCE) { 952 flags |= FORCECLOSE; 953 } 954#ifdef UFS_EXTATTR 955 if ((error = ufs_extattr_stop(mp, td))) { 956 if (error != EOPNOTSUPP) 957 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 958 error); 959 } else { 960 ufs_extattr_uepm_destroy(&ump->um_extattr); 961 } 962#endif 963 if (mp->mnt_flag & MNT_SOFTDEP) { 964 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 965 return (error); 966 } else { 967 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 968 return (error); 969 } 970 fs = ump->um_fs; 971 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 972 printf("%s: unmount pending error: blocks %jd files %d\n", 973 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 974 fs->fs_pendinginodes); 975 fs->fs_pendingblocks = 0; 976 fs->fs_pendinginodes = 0; 977 } 978 if (fs->fs_ronly == 0) { 979 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 980 error = ffs_sbupdate(ump, MNT_WAIT); 981 if (error) { 982 fs->fs_clean = 0; 983 return (error); 984 } 985 } 986 ump->um_devvp->v_rdev->si_mountpoint = NULL; 987 988 vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0); 989 /* XXX: see comment above VOP_OPEN */ 990#ifdef notyet 991 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, 992 NOCRED, td); 993#else 994 error = VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED, td); 995#endif 996 997 vrele(ump->um_devvp); 998 999 free(fs->fs_csp, M_UFSMNT); 1000 free(fs, M_UFSMNT); 1001 free(ump, M_UFSMNT); 1002 mp->mnt_data = (qaddr_t)0; 1003 mp->mnt_flag &= ~MNT_LOCAL; 1004 return (error); 1005} 1006 1007/* 1008 * Flush out all the files in a filesystem. 1009 */ 1010int 1011ffs_flushfiles(mp, flags, td) 1012 struct mount *mp; 1013 int flags; 1014 struct thread *td; 1015{ 1016 struct ufsmount *ump; 1017 int error; 1018 1019 ump = VFSTOUFS(mp); 1020#ifdef QUOTA 1021 if (mp->mnt_flag & MNT_QUOTA) { 1022 int i; 1023 error = vflush(mp, 0, SKIPSYSTEM|flags); 1024 if (error) 1025 return (error); 1026 for (i = 0; i < MAXQUOTAS; i++) { 1027 if (ump->um_quotas[i] == NULLVP) 1028 continue; 1029 quotaoff(td, mp, i); 1030 } 1031 /* 1032 * Here we fall through to vflush again to ensure 1033 * that we have gotten rid of all the system vnodes. 1034 */ 1035 } 1036#endif 1037 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1038 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1039 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1040 return (error); 1041 ffs_snapshot_unmount(mp); 1042 /* 1043 * Here we fall through to vflush again to ensure 1044 * that we have gotten rid of all the system vnodes. 1045 */ 1046 } 1047 /* 1048 * Flush all the files. 1049 */ 1050 if ((error = vflush(mp, 0, flags)) != 0) 1051 return (error); 1052 /* 1053 * Flush filesystem metadata. 1054 */ 1055 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1056 error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td); 1057 VOP_UNLOCK(ump->um_devvp, 0, td); 1058 return (error); 1059} 1060 1061/* 1062 * Get filesystem statistics. 1063 */ 1064int 1065ffs_statfs(mp, sbp, td) 1066 struct mount *mp; 1067 struct statfs *sbp; 1068 struct thread *td; 1069{ 1070 struct ufsmount *ump; 1071 struct fs *fs; 1072 1073 ump = VFSTOUFS(mp); 1074 fs = ump->um_fs; 1075 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1076 panic("ffs_statfs"); 1077 sbp->f_bsize = fs->fs_fsize; 1078 sbp->f_iosize = fs->fs_bsize; 1079 sbp->f_blocks = fs->fs_dsize; 1080 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1081 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1082 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1083 dbtofsb(fs, fs->fs_pendingblocks); 1084 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1085 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1086 if (sbp != &mp->mnt_stat) { 1087 sbp->f_type = mp->mnt_vfc->vfc_typenum; 1088 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 1089 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 1090 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 1091 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 1092 } 1093 return (0); 1094} 1095 1096/* 1097 * Go through the disk queues to initiate sandbagged IO; 1098 * go through the inodes to write those that have been modified; 1099 * initiate the writing of the super block if it has been modified. 1100 * 1101 * Note: we are always called with the filesystem marked `MPBUSY'. 1102 */ 1103int 1104ffs_sync(mp, waitfor, cred, td) 1105 struct mount *mp; 1106 int waitfor; 1107 struct ucred *cred; 1108 struct thread *td; 1109{ 1110 struct vnode *nvp, *vp, *devvp; 1111 struct inode *ip; 1112 struct ufsmount *ump = VFSTOUFS(mp); 1113 struct fs *fs; 1114 int error, count, wait, lockreq, allerror = 0; 1115 int restart; 1116 1117 fs = ump->um_fs; 1118 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1119 printf("fs = %s\n", fs->fs_fsmnt); 1120 panic("ffs_sync: rofs mod"); 1121 } 1122 /* 1123 * Write back each (modified) inode. 1124 */ 1125 wait = 0; 1126 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1127 if (waitfor == MNT_WAIT) { 1128 wait = 1; 1129 lockreq = LK_EXCLUSIVE; 1130 } 1131 lockreq |= LK_INTERLOCK; 1132 mtx_lock(&mntvnode_mtx); 1133loop: 1134 restart = 0; 1135 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 1136 /* 1137 * If the vnode that we are about to sync is no longer 1138 * associated with this mount point, start over. 1139 */ 1140 if (vp->v_mount != mp) 1141 goto loop; 1142 1143 /* 1144 * Depend on the mntvnode_slock to keep things stable enough 1145 * for a quick test. Since there might be hundreds of 1146 * thousands of vnodes, we cannot afford even a subroutine 1147 * call unless there's a good chance that we have work to do. 1148 */ 1149 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 1150 VI_LOCK(vp); 1151 if (vp->v_iflag & VI_XLOCK) { 1152 VI_UNLOCK(vp); 1153 continue; 1154 } 1155 ip = VTOI(vp); 1156 if (vp->v_type == VNON || ((ip->i_flag & 1157 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1158 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1159 VI_UNLOCK(vp); 1160 continue; 1161 } 1162 mtx_unlock(&mntvnode_mtx); 1163 if (vp->v_type != VCHR) { 1164 if ((error = vget(vp, lockreq, td)) != 0) { 1165 mtx_lock(&mntvnode_mtx); 1166 if (error == ENOENT) 1167 goto loop; 1168 continue; 1169 } 1170 if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0) 1171 allerror = error; 1172 VOP_UNLOCK(vp, 0, td); 1173 mtx_lock(&mntvnode_mtx); 1174 if (TAILQ_NEXT(vp, v_nmntvnodes) != nvp) 1175 restart = 1; 1176 vrele(vp); 1177 } else { 1178 VI_UNLOCK(vp); 1179 /* XXX UFS_UPDATE is not protected by any lock. */ 1180 UFS_UPDATE(vp, wait); 1181 mtx_lock(&mntvnode_mtx); 1182 } 1183 if (restart) 1184 goto loop; 1185 } 1186 mtx_unlock(&mntvnode_mtx); 1187 /* 1188 * Force stale filesystem control information to be flushed. 1189 */ 1190 if (waitfor == MNT_WAIT) { 1191 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1192 allerror = error; 1193 /* Flushed work items may create new vnodes to clean */ 1194 if (allerror == 0 && count) { 1195 mtx_lock(&mntvnode_mtx); 1196 goto loop; 1197 } 1198 } 1199#ifdef QUOTA 1200 qsync(mp); 1201#endif 1202 devvp = ump->um_devvp; 1203 VI_LOCK(devvp); 1204 if (waitfor != MNT_LAZY && 1205 (devvp->v_numoutput > 0 || TAILQ_FIRST(&devvp->v_dirtyblkhd))) { 1206 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1207 if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0) 1208 allerror = error; 1209 VOP_UNLOCK(devvp, 0, td); 1210 if (allerror == 0 && waitfor == MNT_WAIT) { 1211 mtx_lock(&mntvnode_mtx); 1212 goto loop; 1213 } 1214 } else 1215 VI_UNLOCK(devvp); 1216 /* 1217 * Write back modified superblock. 1218 */ 1219 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1220 allerror = error; 1221 return (allerror); 1222} 1223 1224int 1225ffs_vget(mp, ino, flags, vpp) 1226 struct mount *mp; 1227 ino_t ino; 1228 int flags; 1229 struct vnode **vpp; 1230{ 1231 struct thread *td = curthread; /* XXX */ 1232 struct fs *fs; 1233 struct inode *ip; 1234 struct ufsmount *ump; 1235 struct buf *bp; 1236 struct vnode *vp; 1237 dev_t dev; 1238 int error; 1239 1240 ump = VFSTOUFS(mp); 1241 dev = ump->um_dev; 1242 1243 /* 1244 * We do not lock vnode creation as it is believed to be too 1245 * expensive for such rare case as simultaneous creation of vnode 1246 * for same ino by different processes. We just allow them to race 1247 * and check later to decide who wins. Let the race begin! 1248 */ 1249 if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) 1250 return (error); 1251 if (*vpp != NULL) 1252 return (0); 1253 1254 /* 1255 * If this MALLOC() is performed after the getnewvnode() 1256 * it might block, leaving a vnode with a NULL v_data to be 1257 * found by ffs_sync() if a sync happens to fire right then, 1258 * which will cause a panic because ffs_sync() blindly 1259 * dereferences vp->v_data (as well it should). 1260 */ 1261 ip = uma_zalloc(uma_inode, M_WAITOK); 1262 1263 /* Allocate a new vnode/inode. */ 1264 error = getnewvnode("ufs", mp, ffs_vnodeop_p, &vp); 1265 if (error) { 1266 *vpp = NULL; 1267 uma_zfree(uma_inode, ip); 1268 return (error); 1269 } 1270 bzero((caddr_t)ip, sizeof(struct inode)); 1271 /* 1272 * FFS supports recursive locking. 1273 */ 1274 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1275 vp->v_data = ip; 1276 ip->i_vnode = vp; 1277 ip->i_ump = ump; 1278 ip->i_fs = fs = ump->um_fs; 1279 ip->i_dev = dev; 1280 ip->i_number = ino; 1281#ifdef QUOTA 1282 { 1283 int i; 1284 for (i = 0; i < MAXQUOTAS; i++) 1285 ip->i_dquot[i] = NODQUOT; 1286 } 1287#endif 1288 /* 1289 * Exclusively lock the vnode before adding to hash. Note, that we 1290 * must not release nor downgrade the lock (despite flags argument 1291 * says) till it is fully initialized. 1292 */ 1293 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td); 1294 1295 /* 1296 * Atomicaly (in terms of ufs_hash operations) check the hash for 1297 * duplicate of vnode being created and add it to the hash. If a 1298 * duplicate vnode was found, it will be vget()ed from hash for us. 1299 */ 1300 if ((error = ufs_ihashins(ip, flags, vpp)) != 0) { 1301 vput(vp); 1302 *vpp = NULL; 1303 return (error); 1304 } 1305 1306 /* We lost the race, then throw away our vnode and return existing */ 1307 if (*vpp != NULL) { 1308 vput(vp); 1309 return (0); 1310 } 1311 1312 /* Read in the disk contents for the inode, copy into the inode. */ 1313 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1314 (int)fs->fs_bsize, NOCRED, &bp); 1315 if (error) { 1316 /* 1317 * The inode does not contain anything useful, so it would 1318 * be misleading to leave it on its hash chain. With mode 1319 * still zero, it will be unlinked and returned to the free 1320 * list by vput(). 1321 */ 1322 brelse(bp); 1323 vput(vp); 1324 *vpp = NULL; 1325 return (error); 1326 } 1327 if (ip->i_ump->um_fstype == UFS1) 1328 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1329 else 1330 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1331 ffs_load_inode(bp, ip, fs, ino); 1332 if (DOINGSOFTDEP(vp)) 1333 softdep_load_inodeblock(ip); 1334 else 1335 ip->i_effnlink = ip->i_nlink; 1336 bqrelse(bp); 1337 1338 /* 1339 * Initialize the vnode from the inode, check for aliases. 1340 * Note that the underlying vnode may have changed. 1341 */ 1342 error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1343 if (error) { 1344 vput(vp); 1345 *vpp = NULL; 1346 return (error); 1347 } 1348 /* 1349 * Finish inode initialization. 1350 */ 1351 VREF(ip->i_devvp); 1352 /* 1353 * Set up a generation number for this inode if it does not 1354 * already have one. This should only happen on old filesystems. 1355 */ 1356 if (ip->i_gen == 0) { 1357 ip->i_gen = arc4random() / 2 + 1; 1358 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1359 ip->i_flag |= IN_MODIFIED; 1360 DIP(ip, i_gen) = ip->i_gen; 1361 } 1362 } 1363 /* 1364 * Ensure that uid and gid are correct. This is a temporary 1365 * fix until fsck has been changed to do the update. 1366 */ 1367 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1368 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1369 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1370 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1371 } /* XXX */ 1372 1373#ifdef MAC 1374 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1375 /* 1376 * If this vnode is already allocated, and we're running 1377 * multi-label, attempt to perform a label association 1378 * from the extended attributes on the inode. 1379 */ 1380 error = mac_associate_vnode_extattr(mp, vp); 1381 if (error) { 1382 /* ufs_inactive will release ip->i_devvp ref. */ 1383 vput(vp); 1384 *vpp = NULL; 1385 return (error); 1386 } 1387 } 1388#endif 1389 1390 *vpp = vp; 1391 return (0); 1392} 1393 1394/* 1395 * File handle to vnode 1396 * 1397 * Have to be really careful about stale file handles: 1398 * - check that the inode number is valid 1399 * - call ffs_vget() to get the locked inode 1400 * - check for an unallocated inode (i_mode == 0) 1401 * - check that the given client host has export rights and return 1402 * those rights via. exflagsp and credanonp 1403 */ 1404int 1405ffs_fhtovp(mp, fhp, vpp) 1406 struct mount *mp; 1407 struct fid *fhp; 1408 struct vnode **vpp; 1409{ 1410 struct ufid *ufhp; 1411 struct fs *fs; 1412 1413 ufhp = (struct ufid *)fhp; 1414 fs = VFSTOUFS(mp)->um_fs; 1415 if (ufhp->ufid_ino < ROOTINO || 1416 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1417 return (ESTALE); 1418 return (ufs_fhtovp(mp, ufhp, vpp)); 1419} 1420 1421/* 1422 * Vnode pointer to File handle 1423 */ 1424/* ARGSUSED */ 1425int 1426ffs_vptofh(vp, fhp) 1427 struct vnode *vp; 1428 struct fid *fhp; 1429{ 1430 struct inode *ip; 1431 struct ufid *ufhp; 1432 1433 ip = VTOI(vp); 1434 ufhp = (struct ufid *)fhp; 1435 ufhp->ufid_len = sizeof(struct ufid); 1436 ufhp->ufid_ino = ip->i_number; 1437 ufhp->ufid_gen = ip->i_gen; 1438 return (0); 1439} 1440 1441/* 1442 * Initialize the filesystem. 1443 */ 1444static int 1445ffs_init(vfsp) 1446 struct vfsconf *vfsp; 1447{ 1448 1449 softdep_initialize(); 1450 return (ufs_init(vfsp)); 1451} 1452 1453/* 1454 * Undo the work of ffs_init(). 1455 */ 1456static int 1457ffs_uninit(vfsp) 1458 struct vfsconf *vfsp; 1459{ 1460 int ret; 1461 1462 ret = ufs_uninit(vfsp); 1463 softdep_uninitialize(); 1464 return (ret); 1465} 1466 1467/* 1468 * Write a superblock and associated information back to disk. 1469 */ 1470static int 1471ffs_sbupdate(mp, waitfor) 1472 struct ufsmount *mp; 1473 int waitfor; 1474{ 1475 struct fs *fs = mp->um_fs; 1476 struct buf *bp; 1477 int blks; 1478 void *space; 1479 int i, size, error, allerror = 0; 1480 1481 if (fs->fs_ronly == 1 && 1482 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1483 (MNT_RDONLY | MNT_UPDATE)) 1484 panic("ffs_sbupdate: write read-only filesystem"); 1485 /* 1486 * First write back the summary information. 1487 */ 1488 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1489 space = fs->fs_csp; 1490 for (i = 0; i < blks; i += fs->fs_frag) { 1491 size = fs->fs_bsize; 1492 if (i + fs->fs_frag > blks) 1493 size = (blks - i) * fs->fs_fsize; 1494 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1495 size, 0, 0, 0); 1496 bcopy(space, bp->b_data, (u_int)size); 1497 space = (char *)space + size; 1498 if (waitfor != MNT_WAIT) 1499 bawrite(bp); 1500 else if ((error = bwrite(bp)) != 0) 1501 allerror = error; 1502 } 1503 /* 1504 * Now write back the superblock itself. If any errors occurred 1505 * up to this point, then fail so that the superblock avoids 1506 * being written out as clean. 1507 */ 1508 if (allerror) 1509 return (allerror); 1510 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1511 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1512 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1513 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1514 fs->fs_sblockloc = SBLOCK_UFS1; 1515 } 1516 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1517 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1518 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1519 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1520 fs->fs_sblockloc = SBLOCK_UFS2; 1521 } 1522 bp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1523 0, 0, 0); 1524 fs->fs_fmod = 0; 1525 fs->fs_time = time_second; 1526 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1527 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1528 if (waitfor != MNT_WAIT) 1529 bawrite(bp); 1530 else if ((error = bwrite(bp)) != 0) 1531 allerror = error; 1532 return (allerror); 1533} 1534 1535static int 1536ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1537 int attrnamespace, const char *attrname, struct thread *td) 1538{ 1539 1540#ifdef UFS_EXTATTR 1541 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1542 attrname, td)); 1543#else 1544 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1545 attrname, td)); 1546#endif 1547} 1548 1549static void 1550ffs_ifree(struct ufsmount *ump, struct inode *ip) 1551{ 1552 1553 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1554 uma_zfree(uma_ufs1, ip->i_din1); 1555 else if (ip->i_din2 != NULL) 1556 uma_zfree(uma_ufs2, ip->i_din2); 1557 uma_zfree(uma_inode, ip); 1558} 1559