ffs_vfsops.c revision 107393
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 * $FreeBSD: head/sys/ufs/ffs/ffs_vfsops.c 107393 2002-11-29 19:20:15Z mckusick $ 35 */ 36 37#include "opt_mac.h" 38#include "opt_quota.h" 39#include "opt_ufs.h" 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/stdint.h> 44#include <sys/namei.h> 45#include <sys/proc.h> 46#include <sys/kernel.h> 47#include <sys/mac.h> 48#include <sys/vnode.h> 49#include <sys/mount.h> 50#include <sys/bio.h> 51#include <sys/buf.h> 52#include <sys/conf.h> 53#include <sys/fcntl.h> 54#include <sys/disk.h> 55#include <sys/malloc.h> 56#include <sys/mutex.h> 57 58#include <ufs/ufs/extattr.h> 59#include <ufs/ufs/quota.h> 60#include <ufs/ufs/ufsmount.h> 61#include <ufs/ufs/inode.h> 62#include <ufs/ufs/ufs_extern.h> 63 64#include <ufs/ffs/fs.h> 65#include <ufs/ffs/ffs_extern.h> 66 67#include <vm/vm.h> 68#include <vm/vm_page.h> 69 70static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part"); 71 72static int ffs_sbupdate(struct ufsmount *, int); 73 int ffs_reload(struct mount *,struct ucred *,struct thread *); 74static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 75 ufs2_daddr_t); 76static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 77static vfs_init_t ffs_init; 78static vfs_uninit_t ffs_uninit; 79static vfs_extattrctl_t ffs_extattrctl; 80 81static struct vfsops ufs_vfsops = { 82 ffs_mount, 83 ufs_start, 84 ffs_unmount, 85 ufs_root, 86 ufs_quotactl, 87 ffs_statfs, 88 ffs_sync, 89 ffs_vget, 90 ffs_fhtovp, 91 vfs_stdcheckexp, 92 ffs_vptofh, 93 ffs_init, 94 ffs_uninit, 95 ffs_extattrctl, 96}; 97 98VFS_SET(ufs_vfsops, ufs, 0); 99 100/* 101 * ffs_mount 102 * 103 * Called when mounting local physical media 104 * 105 * PARAMETERS: 106 * mountroot 107 * mp mount point structure 108 * path NULL (flag for root mount!!!) 109 * data <unused> 110 * ndp <unused> 111 * p process (user credentials check [statfs]) 112 * 113 * mount 114 * mp mount point structure 115 * path path to mount point 116 * data pointer to argument struct in user space 117 * ndp mount point namei() return (used for 118 * credentials on reload), reused to look 119 * up block device. 120 * p process (user credentials check) 121 * 122 * RETURNS: 0 Success 123 * !0 error number (errno.h) 124 * 125 * LOCK STATE: 126 * 127 * ENTRY 128 * mount point is locked 129 * EXIT 130 * mount point is locked 131 * 132 * NOTES: 133 * A NULL path can be used for a flag since the mount 134 * system call will fail with EFAULT in copyinstr in 135 * namei() if it is a genuine NULL from the user. 136 */ 137int 138ffs_mount(mp, path, data, ndp, td) 139 struct mount *mp; /* mount struct pointer*/ 140 char *path; /* path to mount point*/ 141 caddr_t data; /* arguments to FS specific mount*/ 142 struct nameidata *ndp; /* mount point credentials*/ 143 struct thread *td; /* process requesting mount*/ 144{ 145 size_t size; 146 struct vnode *devvp; 147 struct ufs_args args; 148 struct ufsmount *ump = 0; 149 struct fs *fs; 150 int error, flags; 151 mode_t accessmode; 152 153 /* 154 * Use NULL path to indicate we are mounting the root filesystem. 155 */ 156 if (path == NULL) { 157 if ((error = bdevvp(rootdev, &rootvp))) { 158 printf("ffs_mountroot: can't find rootvp\n"); 159 return (error); 160 } 161 162 if ((error = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0) 163 return (error); 164 (void)VFS_STATFS(mp, &mp->mnt_stat, td); 165 return (0); 166 } 167 168 /* 169 * Mounting non-root filesystem or updating a filesystem 170 */ 171 if ((error = copyin(data, (caddr_t)&args, sizeof(struct ufs_args)))!= 0) 172 return (error); 173 174 /* 175 * If updating, check whether changing from read-only to 176 * read/write; if there is no device name, that's all we do. 177 */ 178 if (mp->mnt_flag & MNT_UPDATE) { 179 ump = VFSTOUFS(mp); 180 fs = ump->um_fs; 181 devvp = ump->um_devvp; 182 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 183 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 184 return (error); 185 /* 186 * Flush any dirty data. 187 */ 188 if ((error = VFS_SYNC(mp, MNT_WAIT, 189 td->td_proc->p_ucred, td)) != 0) { 190 vn_finished_write(mp); 191 return (error); 192 } 193 /* 194 * Check for and optionally get rid of files open 195 * for writing. 196 */ 197 flags = WRITECLOSE; 198 if (mp->mnt_flag & MNT_FORCE) 199 flags |= FORCECLOSE; 200 if (mp->mnt_flag & MNT_SOFTDEP) { 201 error = softdep_flushfiles(mp, flags, td); 202 } else { 203 error = ffs_flushfiles(mp, flags, td); 204 } 205 if (error) { 206 vn_finished_write(mp); 207 return (error); 208 } 209 if (fs->fs_pendingblocks != 0 || 210 fs->fs_pendinginodes != 0) { 211 printf("%s: %s: blocks %jd files %d\n", 212 fs->fs_fsmnt, "update error", 213 (intmax_t)fs->fs_pendingblocks, 214 fs->fs_pendinginodes); 215 fs->fs_pendingblocks = 0; 216 fs->fs_pendinginodes = 0; 217 } 218 fs->fs_ronly = 1; 219 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 220 fs->fs_clean = 1; 221 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 222 fs->fs_ronly = 0; 223 fs->fs_clean = 0; 224 vn_finished_write(mp); 225 return (error); 226 } 227 vn_finished_write(mp); 228 } 229 if ((mp->mnt_flag & MNT_RELOAD) && 230 (error = ffs_reload(mp, ndp->ni_cnd.cn_cred, td)) != 0) 231 return (error); 232 if (fs->fs_ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 233 /* 234 * If upgrade to read-write by non-root, then verify 235 * that user has necessary permissions on the device. 236 */ 237 if (suser(td)) { 238 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 239 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 240 td->td_ucred, td)) != 0) { 241 VOP_UNLOCK(devvp, 0, td); 242 return (error); 243 } 244 VOP_UNLOCK(devvp, 0, td); 245 } 246 fs->fs_flags &= ~FS_UNCLEAN; 247 if (fs->fs_clean == 0) { 248 fs->fs_flags |= FS_UNCLEAN; 249 if ((mp->mnt_flag & MNT_FORCE) || 250 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 251 (fs->fs_flags & FS_DOSOFTDEP))) { 252 printf("WARNING: %s was not %s\n", 253 fs->fs_fsmnt, "properly dismounted"); 254 } else { 255 printf( 256"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 257 fs->fs_fsmnt); 258 return (EPERM); 259 } 260 } 261 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 262 return (error); 263 fs->fs_ronly = 0; 264 fs->fs_clean = 0; 265 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 266 vn_finished_write(mp); 267 return (error); 268 } 269 /* check to see if we need to start softdep */ 270 if ((fs->fs_flags & FS_DOSOFTDEP) && 271 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 272 vn_finished_write(mp); 273 return (error); 274 } 275 if (fs->fs_snapinum[0] != 0) 276 ffs_snapshot_mount(mp); 277 vn_finished_write(mp); 278 } 279 /* 280 * Soft updates is incompatible with "async", 281 * so if we are doing softupdates stop the user 282 * from setting the async flag in an update. 283 * Softdep_mount() clears it in an initial mount 284 * or ro->rw remount. 285 */ 286 if (mp->mnt_flag & MNT_SOFTDEP) 287 mp->mnt_flag &= ~MNT_ASYNC; 288 /* 289 * If not updating name, process export requests. 290 */ 291 if (args.fspec == 0) 292 return (vfs_export(mp, &args.export)); 293 /* 294 * If this is a snapshot request, take the snapshot. 295 */ 296 if (mp->mnt_flag & MNT_SNAPSHOT) 297 return (ffs_snapshot(mp, args.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 block device. 303 */ 304 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.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 != ump->um_devvp && 339 devvp->v_rdev != ump->um_devvp->v_rdev) 340 error = EINVAL; /* needs translation */ 341 vrele(devvp); 342 if (error) 343 return (error); 344 } else { 345 /* 346 * New mount 347 * 348 * We need the name for the mount point (also used for 349 * "last mounted on") copied in. If an error occurs, 350 * the mount point is discarded by the upper level code. 351 * Note that vfs_mount() populates f_mntonname for us. 352 */ 353 if ((error = ffs_mountfs(devvp, mp, td, M_FFSNODE)) != 0) { 354 vrele(devvp); 355 return (error); 356 } 357 } 358 /* 359 * Save "mounted from" device name info for mount point (NULL pad). 360 */ 361 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 362 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 363 /* 364 * Initialize filesystem stat information in mount struct. 365 */ 366 (void)VFS_STATFS(mp, &mp->mnt_stat, td); 367 return (0); 368} 369 370/* 371 * Reload all incore data for a filesystem (used after running fsck on 372 * the root filesystem and finding things to fix). The filesystem must 373 * be mounted read-only. 374 * 375 * Things to do to update the mount: 376 * 1) invalidate all cached meta-data. 377 * 2) re-read superblock from disk. 378 * 3) re-read summary information from disk. 379 * 4) invalidate all inactive vnodes. 380 * 5) invalidate all cached file data. 381 * 6) re-read inode data for all active vnodes. 382 */ 383int 384ffs_reload(mp, cred, td) 385 struct mount *mp; 386 struct ucred *cred; 387 struct thread *td; 388{ 389 struct vnode *vp, *nvp, *devvp; 390 struct inode *ip; 391 void *space; 392 struct buf *bp; 393 struct fs *fs, *newfs; 394 dev_t dev; 395 ufs2_daddr_t sblockloc; 396 int i, blks, size, error; 397 int32_t *lp; 398 399 if ((mp->mnt_flag & MNT_RDONLY) == 0) 400 return (EINVAL); 401 /* 402 * Step 1: invalidate all cached meta-data. 403 */ 404 devvp = VFSTOUFS(mp)->um_devvp; 405 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 406 error = vinvalbuf(devvp, 0, cred, td, 0, 0); 407 VOP_UNLOCK(devvp, 0, td); 408 if (error) 409 panic("ffs_reload: dirty1"); 410 411 dev = devvp->v_rdev; 412 413 /* 414 * Only VMIO the backing device if the backing device is a real 415 * block device. 416 */ 417 if (vn_isdisk(devvp, NULL)) { 418 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 419 vfs_object_create(devvp, td, td->td_ucred); 420 /* XXX Why lock only to release immediately?? */ 421 mtx_lock(&devvp->v_interlock); 422 VOP_UNLOCK(devvp, LK_INTERLOCK, td); 423 } 424 425 /* 426 * Step 2: re-read superblock from disk. 427 */ 428 fs = VFSTOUFS(mp)->um_fs; 429 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 430 NOCRED, &bp)) != 0) 431 return (error); 432 newfs = (struct fs *)bp->b_data; 433 if ((newfs->fs_magic != FS_UFS1_MAGIC && 434 newfs->fs_magic != FS_UFS2_MAGIC) || 435 newfs->fs_bsize > MAXBSIZE || 436 newfs->fs_bsize < sizeof(struct fs)) { 437 brelse(bp); 438 return (EIO); /* XXX needs translation */ 439 } 440 /* 441 * Copy pointer fields back into superblock before copying in XXX 442 * new superblock. These should really be in the ufsmount. XXX 443 * Note that important parameters (eg fs_ncg) are unchanged. 444 */ 445 newfs->fs_csp = fs->fs_csp; 446 newfs->fs_maxcluster = fs->fs_maxcluster; 447 newfs->fs_contigdirs = fs->fs_contigdirs; 448 newfs->fs_active = fs->fs_active; 449 sblockloc = fs->fs_sblockloc; 450 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 451 brelse(bp); 452 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 453 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 454 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 455 printf("%s: reload pending error: blocks %jd files %d\n", 456 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 457 fs->fs_pendinginodes); 458 fs->fs_pendingblocks = 0; 459 fs->fs_pendinginodes = 0; 460 } 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 mtx_lock(&mntvnode_mtx); 490 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 491 if (vp->v_mount != mp) { 492 mtx_unlock(&mntvnode_mtx); 493 goto loop; 494 } 495 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 496 mtx_unlock(&mntvnode_mtx); 497 /* 498 * Step 4: invalidate all inactive vnodes. 499 */ 500 if (vrecycle(vp, NULL, td)) 501 goto loop; 502 /* 503 * Step 5: invalidate all cached file data. 504 */ 505 /* XXX Why lock only to release immediately? */ 506 mtx_lock(&vp->v_interlock); 507 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 508 goto loop; 509 } 510 if (vinvalbuf(vp, 0, cred, 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 vput(vp); 521 return (error); 522 } 523 ffs_load_inode(bp, ip, NULL, fs, ip->i_number); 524 ip->i_effnlink = ip->i_nlink; 525 brelse(bp); 526 vput(vp); 527 mtx_lock(&mntvnode_mtx); 528 } 529 mtx_unlock(&mntvnode_mtx); 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 */ 541int 542ffs_mountfs(devvp, mp, td, malloctype) 543 struct vnode *devvp; 544 struct mount *mp; 545 struct thread *td; 546 struct malloc_type *malloctype; 547{ 548 struct ufsmount *ump; 549 struct buf *bp; 550 struct fs *fs; 551 dev_t dev; 552 void *space; 553 ufs2_daddr_t sblockloc; 554 int error, i, blks, size, ronly; 555 int32_t *lp; 556 struct ucred *cred; 557 size_t strsize; 558 int ncount; 559 560 dev = devvp->v_rdev; 561 cred = td ? td->td_ucred : NOCRED; 562 /* 563 * Disallow multiple mounts of the same device. 564 * Disallow mounting of a device that is currently in use 565 * (except for root, which might share swap device for miniroot). 566 * Flush out any old buffers remaining from a previous use. 567 */ 568 error = vfs_mountedon(devvp); 569 if (error) 570 return (error); 571 ncount = vcount(devvp); 572 573 if (ncount > 1 && devvp != rootvp) 574 return (EBUSY); 575 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 576 error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0); 577 VOP_UNLOCK(devvp, 0, td); 578 if (error) 579 return (error); 580 581 /* 582 * Only VMIO the backing device if the backing device is a real 583 * block device. 584 * Note that it is optional that the backing device be VMIOed. This 585 * increases the opportunity for metadata caching. 586 */ 587 if (vn_isdisk(devvp, NULL)) { 588 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 589 vfs_object_create(devvp, td, cred); 590 /* XXX Why lock only to release immediately?? */ 591 mtx_lock(&devvp->v_interlock); 592 VOP_UNLOCK(devvp, LK_INTERLOCK, td); 593 } 594 595 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 596 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 597 /* 598 * XXX: We don't re-VOP_OPEN in FREAD|FWRITE mode if the filesystem 599 * XXX: is subsequently remounted, so open it FREAD|FWRITE from the 600 * XXX: start to avoid getting trashed later on. 601 */ 602#ifdef notyet 603 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td); 604#else 605 error = VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, td); 606#endif 607 VOP_UNLOCK(devvp, 0, td); 608 if (error) 609 return (error); 610 if (devvp->v_rdev->si_iosize_max != 0) 611 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 612 if (mp->mnt_iosize_max > MAXPHYS) 613 mp->mnt_iosize_max = MAXPHYS; 614 615 bp = NULL; 616 ump = NULL; 617 fs = NULL; 618 sblockloc = 0; 619 /* 620 * Try reading the superblock in each of its possible locations. 621 */ 622 for (i = 0; sblock_try[i] != -1; i++) { 623 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 624 cred, &bp)) != 0) 625 goto out; 626 fs = (struct fs *)bp->b_data; 627 sblockloc = sblock_try[i]; 628 if ((fs->fs_magic == FS_UFS1_MAGIC || 629 (fs->fs_magic == FS_UFS2_MAGIC && 630 (fs->fs_sblockloc == sblockloc || 631 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 632 fs->fs_bsize <= MAXBSIZE && 633 fs->fs_bsize >= sizeof(struct fs)) 634 break; 635 brelse(bp); 636 bp = NULL; 637 } 638 if (sblock_try[i] == -1) { 639 error = EINVAL; /* XXX needs translation */ 640 goto out; 641 } 642 fs->fs_fmod = 0; 643 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 644 fs->fs_flags &= ~FS_UNCLEAN; 645 if (fs->fs_clean == 0) { 646 fs->fs_flags |= FS_UNCLEAN; 647 if (ronly || (mp->mnt_flag & MNT_FORCE) || 648 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 649 (fs->fs_flags & FS_DOSOFTDEP))) { 650 printf( 651"WARNING: %s was not properly dismounted\n", 652 fs->fs_fsmnt); 653 } else { 654 printf( 655"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 656 fs->fs_fsmnt); 657 error = EPERM; 658 goto out; 659 } 660 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 661 (mp->mnt_flag & MNT_FORCE)) { 662 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 663 (intmax_t)fs->fs_pendingblocks, 664 fs->fs_pendinginodes); 665 fs->fs_pendingblocks = 0; 666 fs->fs_pendinginodes = 0; 667 } 668 } 669 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 670 printf("%s: mount pending error: blocks %jd files %d\n", 671 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 672 fs->fs_pendinginodes); 673 fs->fs_pendingblocks = 0; 674 fs->fs_pendinginodes = 0; 675 } 676 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 677 ump->um_malloctype = malloctype; 678 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 679 M_WAITOK); 680 if (fs->fs_magic == FS_UFS1_MAGIC) { 681 ump->um_fstype = UFS1; 682 ump->um_balloc = ffs_balloc_ufs1; 683 } else { 684 ump->um_fstype = UFS2; 685 ump->um_balloc = ffs_balloc_ufs2; 686 } 687 ump->um_blkatoff = ffs_blkatoff; 688 ump->um_truncate = ffs_truncate; 689 ump->um_update = ffs_update; 690 ump->um_valloc = ffs_valloc; 691 ump->um_vfree = ffs_vfree; 692 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 693 if (fs->fs_sbsize < SBLOCKSIZE) 694 bp->b_flags |= B_INVAL | B_NOCACHE; 695 brelse(bp); 696 bp = NULL; 697 fs = ump->um_fs; 698 ffs_oldfscompat_read(fs, ump, sblockloc); 699 fs->fs_ronly = ronly; 700 size = fs->fs_cssize; 701 blks = howmany(size, fs->fs_fsize); 702 if (fs->fs_contigsumsize > 0) 703 size += fs->fs_ncg * sizeof(int32_t); 704 size += fs->fs_ncg * sizeof(u_int8_t); 705 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 706 fs->fs_csp = space; 707 for (i = 0; i < blks; i += fs->fs_frag) { 708 size = fs->fs_bsize; 709 if (i + fs->fs_frag > blks) 710 size = (blks - i) * fs->fs_fsize; 711 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 712 cred, &bp)) != 0) { 713 free(fs->fs_csp, M_UFSMNT); 714 goto out; 715 } 716 bcopy(bp->b_data, space, (u_int)size); 717 space = (char *)space + size; 718 brelse(bp); 719 bp = NULL; 720 } 721 if (fs->fs_contigsumsize > 0) { 722 fs->fs_maxcluster = lp = space; 723 for (i = 0; i < fs->fs_ncg; i++) 724 *lp++ = fs->fs_contigsumsize; 725 space = lp; 726 } 727 size = fs->fs_ncg * sizeof(u_int8_t); 728 fs->fs_contigdirs = (u_int8_t *)space; 729 bzero(fs->fs_contigdirs, size); 730 fs->fs_active = NULL; 731 mp->mnt_data = (qaddr_t)ump; 732 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 733 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 734 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 735 vfs_getvfs(&mp->mnt_stat.f_fsid)) 736 vfs_getnewfsid(mp); 737 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 738 mp->mnt_flag |= MNT_LOCAL; 739 if ((fs->fs_flags & FS_MULTILABEL) != 0) 740#ifdef MAC 741 mp->mnt_flag |= MNT_MULTILABEL; 742#else 743 printf( 744"WARNING: %s: multilabel flag on fs but no MAC support\n", 745 fs->fs_fsmnt); 746#endif 747 if ((fs->fs_flags & FS_ACLS) != 0) 748#ifdef UFS_ACL 749 mp->mnt_flag |= MNT_ACLS; 750#else 751 printf( 752"WARNING: %s: ACLs flag on fs but no ACLs support\n", 753 fs->fs_fsmnt); 754#endif 755 ump->um_mountp = mp; 756 ump->um_dev = dev; 757 ump->um_devvp = devvp; 758 ump->um_nindir = fs->fs_nindir; 759 ump->um_bptrtodb = fs->fs_fsbtodb; 760 ump->um_seqinc = fs->fs_frag; 761 for (i = 0; i < MAXQUOTAS; i++) 762 ump->um_quotas[i] = NULLVP; 763#ifdef UFS_EXTATTR 764 ufs_extattr_uepm_init(&ump->um_extattr); 765#endif 766 devvp->v_rdev->si_mountpoint = mp; 767 768 /* 769 * Set FS local "last mounted on" information (NULL pad) 770 */ 771 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 772 fs->fs_fsmnt, /* copy area*/ 773 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 774 &strsize); /* real size*/ 775 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 776 777 if( mp->mnt_flag & MNT_ROOTFS) { 778 /* 779 * Root mount; update timestamp in mount structure. 780 * this will be used by the common root mount code 781 * to update the system clock. 782 */ 783 mp->mnt_time = fs->fs_time; 784 } 785 786 if (ronly == 0) { 787 if ((fs->fs_flags & FS_DOSOFTDEP) && 788 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 789 free(fs->fs_csp, M_UFSMNT); 790 goto out; 791 } 792 if (fs->fs_snapinum[0] != 0) 793 ffs_snapshot_mount(mp); 794 fs->fs_fmod = 1; 795 fs->fs_clean = 0; 796 (void) ffs_sbupdate(ump, MNT_WAIT); 797 } 798#ifdef UFS_EXTATTR 799#ifdef UFS_EXTATTR_AUTOSTART 800 /* 801 * 802 * Auto-starting does the following: 803 * - check for /.attribute in the fs, and extattr_start if so 804 * - for each file in .attribute, enable that file with 805 * an attribute of the same name. 806 * Not clear how to report errors -- probably eat them. 807 * This would all happen while the filesystem was busy/not 808 * available, so would effectively be "atomic". 809 */ 810 (void) ufs_extattr_autostart(mp, td); 811#endif /* !UFS_EXTATTR_AUTOSTART */ 812#endif /* !UFS_EXTATTR */ 813 return (0); 814out: 815 devvp->v_rdev->si_mountpoint = NULL; 816 if (bp) 817 brelse(bp); 818 /* XXX: see comment above VOP_OPEN */ 819#ifdef notyet 820 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, td); 821#else 822 (void)VOP_CLOSE(devvp, FREAD|FWRITE, cred, td); 823#endif 824 if (ump) { 825 free(ump->um_fs, M_UFSMNT); 826 free(ump, M_UFSMNT); 827 mp->mnt_data = (qaddr_t)0; 828 } 829 return (error); 830} 831 832#include <sys/sysctl.h> 833int bigcgs = 0; 834SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 835 836/* 837 * Sanity checks for loading old filesystem superblocks. 838 * See ffs_oldfscompat_write below for unwound actions. 839 * 840 * XXX - Parts get retired eventually. 841 * Unfortunately new bits get added. 842 */ 843static void 844ffs_oldfscompat_read(fs, ump, sblockloc) 845 struct fs *fs; 846 struct ufsmount *ump; 847 ufs2_daddr_t sblockloc; 848{ 849 off_t maxfilesize; 850 851 /* 852 * If not yet done, update fs_flags location and value of fs_sblockloc. 853 */ 854 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 855 fs->fs_flags = fs->fs_old_flags; 856 fs->fs_old_flags |= FS_FLAGS_UPDATED; 857 fs->fs_sblockloc = sblockloc; 858 } 859 /* 860 * If not yet done, update UFS1 superblock with new wider fields. 861 */ 862 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_size != fs->fs_old_size) { 863 fs->fs_maxbsize = fs->fs_bsize; 864 fs->fs_time = fs->fs_old_time; 865 fs->fs_size = fs->fs_old_size; 866 fs->fs_dsize = fs->fs_old_dsize; 867 fs->fs_csaddr = fs->fs_old_csaddr; 868 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 869 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 870 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 871 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 872 } 873 if (fs->fs_magic == FS_UFS1_MAGIC && 874 fs->fs_old_inodefmt < FS_44INODEFMT) { 875 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 876 fs->fs_qbmask = ~fs->fs_bmask; 877 fs->fs_qfmask = ~fs->fs_fmask; 878 } 879 if (fs->fs_magic == FS_UFS1_MAGIC) { 880 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 881 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 882 if (fs->fs_maxfilesize > maxfilesize) 883 fs->fs_maxfilesize = maxfilesize; 884 } 885 /* Compatibility for old filesystems */ 886 if (fs->fs_avgfilesize <= 0) 887 fs->fs_avgfilesize = AVFILESIZ; 888 if (fs->fs_avgfpdir <= 0) 889 fs->fs_avgfpdir = AFPDIR; 890 if (bigcgs) { 891 fs->fs_save_cgsize = fs->fs_cgsize; 892 fs->fs_cgsize = fs->fs_bsize; 893 } 894} 895 896/* 897 * Unwinding superblock updates for old filesystems. 898 * See ffs_oldfscompat_read above for details. 899 * 900 * XXX - Parts get retired eventually. 901 * Unfortunately new bits get added. 902 */ 903static void 904ffs_oldfscompat_write(fs, ump) 905 struct fs *fs; 906 struct ufsmount *ump; 907{ 908 909 /* 910 * Copy back UFS2 updated fields that UFS1 inspects. 911 */ 912 if (fs->fs_magic == FS_UFS1_MAGIC) { 913 fs->fs_old_time = fs->fs_time; 914 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 915 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 916 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 917 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 918 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 919 } 920 if (bigcgs) { 921 fs->fs_cgsize = fs->fs_save_cgsize; 922 fs->fs_save_cgsize = 0; 923 } 924} 925 926/* 927 * unmount system call 928 */ 929int 930ffs_unmount(mp, mntflags, td) 931 struct mount *mp; 932 int mntflags; 933 struct thread *td; 934{ 935 struct ufsmount *ump = VFSTOUFS(mp); 936 struct fs *fs; 937 int error, flags; 938 939 flags = 0; 940 if (mntflags & MNT_FORCE) { 941 flags |= FORCECLOSE; 942 } 943#ifdef UFS_EXTATTR 944 if ((error = ufs_extattr_stop(mp, td))) { 945 if (error != EOPNOTSUPP) 946 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 947 error); 948 } else { 949 ufs_extattr_uepm_destroy(&ump->um_extattr); 950 } 951#endif 952 if (mp->mnt_flag & MNT_SOFTDEP) { 953 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 954 return (error); 955 } else { 956 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 957 return (error); 958 } 959 fs = ump->um_fs; 960 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 961 printf("%s: unmount pending error: blocks %jd files %d\n", 962 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 963 fs->fs_pendinginodes); 964 fs->fs_pendingblocks = 0; 965 fs->fs_pendinginodes = 0; 966 } 967 if (fs->fs_ronly == 0) { 968 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 969 error = ffs_sbupdate(ump, MNT_WAIT); 970 if (error) { 971 fs->fs_clean = 0; 972 return (error); 973 } 974 } 975 ump->um_devvp->v_rdev->si_mountpoint = NULL; 976 977 vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0); 978 /* XXX: see comment above VOP_OPEN */ 979#ifdef notyet 980 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, 981 NOCRED, td); 982#else 983 error = VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED, td); 984#endif 985 986 vrele(ump->um_devvp); 987 988 free(fs->fs_csp, M_UFSMNT); 989 free(fs, M_UFSMNT); 990 free(ump, M_UFSMNT); 991 mp->mnt_data = (qaddr_t)0; 992 mp->mnt_flag &= ~MNT_LOCAL; 993 return (error); 994} 995 996/* 997 * Flush out all the files in a filesystem. 998 */ 999int 1000ffs_flushfiles(mp, flags, td) 1001 struct mount *mp; 1002 int flags; 1003 struct thread *td; 1004{ 1005 struct ufsmount *ump; 1006 int error; 1007 1008 ump = VFSTOUFS(mp); 1009#ifdef QUOTA 1010 if (mp->mnt_flag & MNT_QUOTA) { 1011 int i; 1012 error = vflush(mp, 0, SKIPSYSTEM|flags); 1013 if (error) 1014 return (error); 1015 for (i = 0; i < MAXQUOTAS; i++) { 1016 if (ump->um_quotas[i] == NULLVP) 1017 continue; 1018 quotaoff(td, mp, i); 1019 } 1020 /* 1021 * Here we fall through to vflush again to ensure 1022 * that we have gotten rid of all the system vnodes. 1023 */ 1024 } 1025#endif 1026 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1027 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1028 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1029 return (error); 1030 ffs_snapshot_unmount(mp); 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 /* 1037 * Flush all the files. 1038 */ 1039 if ((error = vflush(mp, 0, flags)) != 0) 1040 return (error); 1041 /* 1042 * Flush filesystem metadata. 1043 */ 1044 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1045 error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td); 1046 VOP_UNLOCK(ump->um_devvp, 0, td); 1047 return (error); 1048} 1049 1050/* 1051 * Get filesystem statistics. 1052 */ 1053int 1054ffs_statfs(mp, sbp, td) 1055 struct mount *mp; 1056 struct statfs *sbp; 1057 struct thread *td; 1058{ 1059 struct ufsmount *ump; 1060 struct fs *fs; 1061 1062 ump = VFSTOUFS(mp); 1063 fs = ump->um_fs; 1064 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1065 panic("ffs_statfs"); 1066 sbp->f_bsize = fs->fs_fsize; 1067 sbp->f_iosize = fs->fs_bsize; 1068 sbp->f_blocks = fs->fs_dsize; 1069 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1070 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1071 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1072 dbtofsb(fs, fs->fs_pendingblocks); 1073 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1074 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1075 if (sbp != &mp->mnt_stat) { 1076 sbp->f_type = mp->mnt_vfc->vfc_typenum; 1077 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 1078 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 1079 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 1080 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 1081 } 1082 return (0); 1083} 1084 1085/* 1086 * Go through the disk queues to initiate sandbagged IO; 1087 * go through the inodes to write those that have been modified; 1088 * initiate the writing of the super block if it has been modified. 1089 * 1090 * Note: we are always called with the filesystem marked `MPBUSY'. 1091 */ 1092int 1093ffs_sync(mp, waitfor, cred, td) 1094 struct mount *mp; 1095 int waitfor; 1096 struct ucred *cred; 1097 struct thread *td; 1098{ 1099 struct vnode *nvp, *vp, *devvp; 1100 struct inode *ip; 1101 struct ufsmount *ump = VFSTOUFS(mp); 1102 struct fs *fs; 1103 int error, count, wait, lockreq, allerror = 0; 1104 1105 fs = ump->um_fs; 1106 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1107 printf("fs = %s\n", fs->fs_fsmnt); 1108 panic("ffs_sync: rofs mod"); 1109 } 1110 /* 1111 * Write back each (modified) inode. 1112 */ 1113 wait = 0; 1114 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1115 if (waitfor == MNT_WAIT) { 1116 wait = 1; 1117 lockreq = LK_EXCLUSIVE; 1118 } 1119 mtx_lock(&mntvnode_mtx); 1120loop: 1121 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 1122 /* 1123 * If the vnode that we are about to sync is no longer 1124 * associated with this mount point, start over. 1125 */ 1126 if (vp->v_mount != mp) 1127 goto loop; 1128 1129 /* 1130 * Depend on the mntvnode_slock to keep things stable enough 1131 * for a quick test. Since there might be hundreds of 1132 * thousands of vnodes, we cannot afford even a subroutine 1133 * call unless there's a good chance that we have work to do. 1134 */ 1135 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 1136 ip = VTOI(vp); 1137 if (vp->v_type == VNON || ((ip->i_flag & 1138 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1139 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1140 continue; 1141 } 1142 if (vp->v_type != VCHR) { 1143 mtx_unlock(&mntvnode_mtx); 1144 if ((error = vget(vp, lockreq, td)) != 0) { 1145 mtx_lock(&mntvnode_mtx); 1146 if (error == ENOENT) 1147 goto loop; 1148 } else { 1149 if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0) 1150 allerror = error; 1151 VOP_UNLOCK(vp, 0, td); 1152 vrele(vp); 1153 mtx_lock(&mntvnode_mtx); 1154 } 1155 } else { 1156 mtx_unlock(&mntvnode_mtx); 1157 UFS_UPDATE(vp, wait); 1158 mtx_lock(&mntvnode_mtx); 1159 } 1160 if (TAILQ_NEXT(vp, v_nmntvnodes) != nvp) 1161 goto loop; 1162 } 1163 mtx_unlock(&mntvnode_mtx); 1164 /* 1165 * Force stale filesystem control information to be flushed. 1166 */ 1167 if (waitfor == MNT_WAIT) { 1168 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1169 allerror = error; 1170 /* Flushed work items may create new vnodes to clean */ 1171 if (allerror == 0 && count) { 1172 mtx_lock(&mntvnode_mtx); 1173 goto loop; 1174 } 1175 } 1176#ifdef QUOTA 1177 qsync(mp); 1178#endif 1179 devvp = ump->um_devvp; 1180 VI_LOCK(devvp); 1181 if (waitfor != MNT_LAZY && 1182 (devvp->v_numoutput > 0 || TAILQ_FIRST(&devvp->v_dirtyblkhd))) { 1183 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1184 if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0) 1185 allerror = error; 1186 VOP_UNLOCK(devvp, 0, td); 1187 if (allerror == 0 && waitfor == MNT_WAIT) { 1188 mtx_lock(&mntvnode_mtx); 1189 goto loop; 1190 } 1191 } else 1192 VI_UNLOCK(devvp); 1193 /* 1194 * Write back modified superblock. 1195 */ 1196 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1197 allerror = error; 1198 return (allerror); 1199} 1200 1201int 1202ffs_vget(mp, ino, flags, vpp) 1203 struct mount *mp; 1204 ino_t ino; 1205 int flags; 1206 struct vnode **vpp; 1207{ 1208 struct thread *td = curthread; /* XXX */ 1209 struct fs *fs; 1210 struct inode *ip; 1211 struct ufsmount *ump; 1212 struct buf *bp; 1213 struct vnode *vp; 1214 dev_t dev; 1215 int error; 1216 1217 ump = VFSTOUFS(mp); 1218 dev = ump->um_dev; 1219 1220 /* 1221 * We do not lock vnode creation as it is believed to be too 1222 * expensive for such rare case as simultaneous creation of vnode 1223 * for same ino by different processes. We just allow them to race 1224 * and check later to decide who wins. Let the race begin! 1225 */ 1226 if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) 1227 return (error); 1228 if (*vpp != NULL) 1229 return (0); 1230 1231 /* 1232 * If this MALLOC() is performed after the getnewvnode() 1233 * it might block, leaving a vnode with a NULL v_data to be 1234 * found by ffs_sync() if a sync happens to fire right then, 1235 * which will cause a panic because ffs_sync() blindly 1236 * dereferences vp->v_data (as well it should). 1237 */ 1238 MALLOC(ip, struct inode *, sizeof(struct inode), 1239 ump->um_malloctype, M_WAITOK); 1240 1241 /* Allocate a new vnode/inode. */ 1242 error = getnewvnode("ufs", mp, ffs_vnodeop_p, &vp); 1243 if (error) { 1244 *vpp = NULL; 1245 FREE(ip, ump->um_malloctype); 1246 return (error); 1247 } 1248 bzero((caddr_t)ip, sizeof(struct inode)); 1249 /* 1250 * FFS supports recursive locking. 1251 */ 1252 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1253 vp->v_data = ip; 1254 ip->i_vnode = vp; 1255 ip->i_ump = ump; 1256 ip->i_fs = fs = ump->um_fs; 1257 ip->i_dev = dev; 1258 ip->i_number = ino; 1259#ifdef QUOTA 1260 { 1261 int i; 1262 for (i = 0; i < MAXQUOTAS; i++) 1263 ip->i_dquot[i] = NODQUOT; 1264 } 1265#endif 1266 /* 1267 * Exclusively lock the vnode before adding to hash. Note, that we 1268 * must not release nor downgrade the lock (despite flags argument 1269 * says) till it is fully initialized. 1270 */ 1271 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td); 1272 1273 /* 1274 * Atomicaly (in terms of ufs_hash operations) check the hash for 1275 * duplicate of vnode being created and add it to the hash. If a 1276 * duplicate vnode was found, it will be vget()ed from hash for us. 1277 */ 1278 if ((error = ufs_ihashins(ip, flags, vpp)) != 0) { 1279 vput(vp); 1280 *vpp = NULL; 1281 return (error); 1282 } 1283 1284 /* We lost the race, then throw away our vnode and return existing */ 1285 if (*vpp != NULL) { 1286 vput(vp); 1287 return (0); 1288 } 1289 1290 /* Read in the disk contents for the inode, copy into the inode. */ 1291 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1292 (int)fs->fs_bsize, NOCRED, &bp); 1293 if (error) { 1294 /* 1295 * The inode does not contain anything useful, so it would 1296 * be misleading to leave it on its hash chain. With mode 1297 * still zero, it will be unlinked and returned to the free 1298 * list by vput(). 1299 */ 1300 brelse(bp); 1301 vput(vp); 1302 *vpp = NULL; 1303 return (error); 1304 } 1305 ffs_load_inode(bp, ip, ump->um_malloctype, fs, ino); 1306 if (DOINGSOFTDEP(vp)) 1307 softdep_load_inodeblock(ip); 1308 else 1309 ip->i_effnlink = ip->i_nlink; 1310 bqrelse(bp); 1311 1312 /* 1313 * Initialize the vnode from the inode, check for aliases. 1314 * Note that the underlying vnode may have changed. 1315 */ 1316 error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1317 if (error) { 1318 vput(vp); 1319 *vpp = NULL; 1320 return (error); 1321 } 1322 /* 1323 * Finish inode initialization now that aliasing has been resolved. 1324 */ 1325 ip->i_devvp = ump->um_devvp; 1326 VREF(ip->i_devvp); 1327 /* 1328 * Set up a generation number for this inode if it does not 1329 * already have one. This should only happen on old filesystems. 1330 */ 1331 if (ip->i_gen == 0) { 1332 ip->i_gen = random() / 2 + 1; 1333 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1334 ip->i_flag |= IN_MODIFIED; 1335 DIP(ip, i_gen) = ip->i_gen; 1336 } 1337 } 1338 /* 1339 * Ensure that uid and gid are correct. This is a temporary 1340 * fix until fsck has been changed to do the update. 1341 */ 1342 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1343 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1344 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1345 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1346 } /* XXX */ 1347 1348#ifdef MAC 1349 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1350 /* 1351 * If this vnode is already allocated, and we're running 1352 * multi-label, attempt to perform a label association 1353 * from the extended attributes on the inode. 1354 */ 1355 error = mac_associate_vnode_extattr(mp, vp); 1356 if (error) { 1357 /* ufs_inactive will release ip->i_devvp ref. */ 1358 vput(vp); 1359 *vpp = NULL; 1360 return (error); 1361 } 1362 } 1363#endif 1364 1365 *vpp = vp; 1366 return (0); 1367} 1368 1369/* 1370 * File handle to vnode 1371 * 1372 * Have to be really careful about stale file handles: 1373 * - check that the inode number is valid 1374 * - call ffs_vget() to get the locked inode 1375 * - check for an unallocated inode (i_mode == 0) 1376 * - check that the given client host has export rights and return 1377 * those rights via. exflagsp and credanonp 1378 */ 1379int 1380ffs_fhtovp(mp, fhp, vpp) 1381 struct mount *mp; 1382 struct fid *fhp; 1383 struct vnode **vpp; 1384{ 1385 struct ufid *ufhp; 1386 struct fs *fs; 1387 1388 ufhp = (struct ufid *)fhp; 1389 fs = VFSTOUFS(mp)->um_fs; 1390 if (ufhp->ufid_ino < ROOTINO || 1391 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1392 return (ESTALE); 1393 return (ufs_fhtovp(mp, ufhp, vpp)); 1394} 1395 1396/* 1397 * Vnode pointer to File handle 1398 */ 1399/* ARGSUSED */ 1400int 1401ffs_vptofh(vp, fhp) 1402 struct vnode *vp; 1403 struct fid *fhp; 1404{ 1405 struct inode *ip; 1406 struct ufid *ufhp; 1407 1408 ip = VTOI(vp); 1409 ufhp = (struct ufid *)fhp; 1410 ufhp->ufid_len = sizeof(struct ufid); 1411 ufhp->ufid_ino = ip->i_number; 1412 ufhp->ufid_gen = ip->i_gen; 1413 return (0); 1414} 1415 1416/* 1417 * Initialize the filesystem. 1418 */ 1419static int 1420ffs_init(vfsp) 1421 struct vfsconf *vfsp; 1422{ 1423 1424 softdep_initialize(); 1425 return (ufs_init(vfsp)); 1426} 1427 1428/* 1429 * Undo the work of ffs_init(). 1430 */ 1431static int 1432ffs_uninit(vfsp) 1433 struct vfsconf *vfsp; 1434{ 1435 int ret; 1436 1437 ret = ufs_uninit(vfsp); 1438 softdep_uninitialize(); 1439 return (ret); 1440} 1441 1442/* 1443 * Write a superblock and associated information back to disk. 1444 */ 1445static int 1446ffs_sbupdate(mp, waitfor) 1447 struct ufsmount *mp; 1448 int waitfor; 1449{ 1450 struct fs *fs = mp->um_fs; 1451 struct buf *bp; 1452 int blks; 1453 void *space; 1454 int i, size, error, allerror = 0; 1455 1456 /* 1457 * First write back the summary information. 1458 */ 1459 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1460 space = fs->fs_csp; 1461 for (i = 0; i < blks; i += fs->fs_frag) { 1462 size = fs->fs_bsize; 1463 if (i + fs->fs_frag > blks) 1464 size = (blks - i) * fs->fs_fsize; 1465 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1466 size, 0, 0); 1467 bcopy(space, bp->b_data, (u_int)size); 1468 space = (char *)space + size; 1469 if (waitfor != MNT_WAIT) 1470 bawrite(bp); 1471 else if ((error = bwrite(bp)) != 0) 1472 allerror = error; 1473 } 1474 /* 1475 * Now write back the superblock itself. If any errors occurred 1476 * up to this point, then fail so that the superblock avoids 1477 * being written out as clean. 1478 */ 1479 if (allerror) 1480 return (allerror); 1481 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1) { 1482 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1483 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1484 fs->fs_sblockloc = SBLOCK_UFS1; 1485 } 1486 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2) { 1487 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1488 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1489 fs->fs_sblockloc = SBLOCK_UFS2; 1490 } 1491 bp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1492 0, 0); 1493 fs->fs_fmod = 0; 1494 fs->fs_time = time_second; 1495 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1496 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1497 if (waitfor != MNT_WAIT) 1498 bawrite(bp); 1499 else if ((error = bwrite(bp)) != 0) 1500 allerror = error; 1501 return (allerror); 1502} 1503 1504static int 1505ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1506 int attrnamespace, const char *attrname, struct thread *td) 1507{ 1508 1509#ifdef UFS_EXTATTR 1510 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1511 attrname, td)); 1512#else 1513 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1514 attrname, td)); 1515#endif 1516} 1517