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 * $FreeBSD$ 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/uma.h> 69 #include <vm/vm_page.h> 70 71 uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 72 73 static int ffs_sbupdate(struct ufsmount *, int); 74 int ffs_reload(struct mount *,struct ucred *,struct thread *); 75 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 76 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 77 ufs2_daddr_t); 78 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 79 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 80 static vfs_init_t ffs_init; 81 static vfs_uninit_t ffs_uninit; 82 static vfs_extattrctl_t ffs_extattrctl; 83 84 static struct vfsops ufs_vfsops = { 85 ffs_mount, 86 ufs_start, 87 ffs_unmount, 88 ufs_root, 89 ufs_quotactl, 90 ffs_statfs, 91 ffs_sync, 92 ffs_vget, 93 ffs_fhtovp, 94 vfs_stdcheckexp, 95 ffs_vptofh, 96 ffs_init, 97 ffs_uninit, 98 ffs_extattrctl, 99 }; 100 101 VFS_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 */ 140 int 141 ffs_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_proc->p_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 */ 397 int 398 ffs_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 dev_t dev; 409 ufs2_daddr_t sblockloc; 410 int i, blks, size, error; 411 int32_t *lp; 412 413 if ((mp->mnt_flag & MNT_RDONLY) == 0) 414 return (EINVAL); 415 /* 416 * Step 1: invalidate all cached meta-data. 417 */ 418 devvp = VFSTOUFS(mp)->um_devvp; 419 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 420 error = vinvalbuf(devvp, 0, cred, td, 0, 0); 421 VOP_UNLOCK(devvp, 0, td); 422 if (error) 423 panic("ffs_reload: dirty1"); 424 425 dev = devvp->v_rdev; 426 427 /* 428 * Only VMIO the backing device if the backing device is a real 429 * block device. 430 */ 431 if (vn_isdisk(devvp, NULL)) { 432 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 433 vfs_object_create(devvp, td, td->td_ucred); 434 /* XXX Why lock only to release immediately?? */ 435 mtx_lock(&devvp->v_interlock); 436 VOP_UNLOCK(devvp, LK_INTERLOCK, td); 437 } 438 439 /* 440 * Step 2: re-read superblock from disk. 441 */ 442 fs = VFSTOUFS(mp)->um_fs; 443 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 444 NOCRED, &bp)) != 0) 445 return (error); 446 newfs = (struct fs *)bp->b_data; 447 if ((newfs->fs_magic != FS_UFS1_MAGIC && 448 newfs->fs_magic != FS_UFS2_MAGIC) || 449 newfs->fs_bsize > MAXBSIZE || 450 newfs->fs_bsize < sizeof(struct fs)) { 451 brelse(bp); 452 return (EIO); /* XXX needs translation */ 453 } 454 /* 455 * Copy pointer fields back into superblock before copying in XXX 456 * new superblock. These should really be in the ufsmount. XXX 457 * Note that important parameters (eg fs_ncg) are unchanged. 458 */ 459 newfs->fs_csp = fs->fs_csp; 460 newfs->fs_maxcluster = fs->fs_maxcluster; 461 newfs->fs_contigdirs = fs->fs_contigdirs; 462 newfs->fs_active = fs->fs_active; 463 sblockloc = fs->fs_sblockloc; 464 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 465 brelse(bp); 466 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 467 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 468 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 469 printf("%s: reload pending error: blocks %jd files %d\n", 470 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 471 fs->fs_pendinginodes); 472 fs->fs_pendingblocks = 0; 473 fs->fs_pendinginodes = 0; 474 } 475 476 /* 477 * Step 3: re-read summary information from disk. 478 */ 479 blks = howmany(fs->fs_cssize, fs->fs_fsize); 480 space = fs->fs_csp; 481 for (i = 0; i < blks; i += fs->fs_frag) { 482 size = fs->fs_bsize; 483 if (i + fs->fs_frag > blks) 484 size = (blks - i) * fs->fs_fsize; 485 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 486 NOCRED, &bp); 487 if (error) 488 return (error); 489 bcopy(bp->b_data, space, (u_int)size); 490 space = (char *)space + size; 491 brelse(bp); 492 } 493 /* 494 * We no longer know anything about clusters per cylinder group. 495 */ 496 if (fs->fs_contigsumsize > 0) { 497 lp = fs->fs_maxcluster; 498 for (i = 0; i < fs->fs_ncg; i++) 499 *lp++ = fs->fs_contigsumsize; 500 } 501 502 loop: 503 mtx_lock(&mntvnode_mtx); 504 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 505 if (vp->v_mount != mp) { 506 mtx_unlock(&mntvnode_mtx); 507 goto loop; 508 } 509 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 510 mtx_unlock(&mntvnode_mtx); 511 /* 512 * Step 4: invalidate all inactive vnodes. 513 */ 514 if (vrecycle(vp, NULL, td)) 515 goto loop; 516 /* 517 * Step 5: invalidate all cached file data. 518 */ 519 /* XXX Why lock only to release immediately? */ 520 mtx_lock(&vp->v_interlock); 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 */ 550 static int sblock_try[] = SBLOCKSEARCH; 551 552 /* 553 * Common code for mount and mountroot 554 */ 555 static int 556 ffs_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 /* XXX Why lock only to release immediately?? */ 604 mtx_lock(&devvp->v_interlock); 605 VOP_UNLOCK(devvp, LK_INTERLOCK, td); 606 } 607 608 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 609 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 610 /* 611 * XXX: We don't re-VOP_OPEN in FREAD|FWRITE mode if the filesystem 612 * XXX: is subsequently remounted, so open it FREAD|FWRITE from the 613 * XXX: start to avoid getting trashed later on. 614 */ 615 #ifdef notyet 616 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td); 617 #else 618 error = VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, td); 619 #endif 620 VOP_UNLOCK(devvp, 0, td); 621 if (error) 622 return (error); 623 if (devvp->v_rdev->si_iosize_max != 0) 624 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 625 if (mp->mnt_iosize_max > MAXPHYS) 626 mp->mnt_iosize_max = MAXPHYS; 627 628 bp = NULL; 629 ump = NULL; 630 fs = NULL; 631 sblockloc = 0; 632 /* 633 * Try reading the superblock in each of its possible locations. 634 */ 635 for (i = 0; sblock_try[i] != -1; i++) { 636 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 637 cred, &bp)) != 0) 638 goto out; 639 fs = (struct fs *)bp->b_data; 640 sblockloc = sblock_try[i]; 641 if ((fs->fs_magic == FS_UFS1_MAGIC || 642 (fs->fs_magic == FS_UFS2_MAGIC && 643 (fs->fs_sblockloc == sblockloc || 644 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 645 fs->fs_bsize <= MAXBSIZE && 646 fs->fs_bsize >= sizeof(struct fs)) 647 break; 648 brelse(bp); 649 bp = NULL; 650 } 651 if (sblock_try[i] == -1) { 652 error = EINVAL; /* XXX needs translation */ 653 goto out; 654 } 655 fs->fs_fmod = 0; 656 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 657 fs->fs_flags &= ~FS_UNCLEAN; 658 if (fs->fs_clean == 0) { 659 fs->fs_flags |= FS_UNCLEAN; 660 if (ronly || (mp->mnt_flag & MNT_FORCE) || 661 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 662 (fs->fs_flags & FS_DOSOFTDEP))) { 663 printf( 664 "WARNING: %s was not properly dismounted\n", 665 fs->fs_fsmnt); 666 } else { 667 printf( 668 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 669 fs->fs_fsmnt); 670 error = EPERM; 671 goto out; 672 } 673 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 674 (mp->mnt_flag & MNT_FORCE)) { 675 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 676 (intmax_t)fs->fs_pendingblocks, 677 fs->fs_pendinginodes); 678 fs->fs_pendingblocks = 0; 679 fs->fs_pendinginodes = 0; 680 } 681 } 682 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 683 printf("%s: mount pending error: blocks %jd files %d\n", 684 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 685 fs->fs_pendinginodes); 686 fs->fs_pendingblocks = 0; 687 fs->fs_pendinginodes = 0; 688 } 689 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 690 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 691 M_WAITOK); 692 if (fs->fs_magic == FS_UFS1_MAGIC) { 693 ump->um_fstype = UFS1; 694 ump->um_balloc = ffs_balloc_ufs1; 695 } else { 696 ump->um_fstype = UFS2; 697 ump->um_balloc = ffs_balloc_ufs2; 698 } 699 ump->um_blkatoff = ffs_blkatoff; 700 ump->um_truncate = ffs_truncate; 701 ump->um_update = ffs_update; 702 ump->um_valloc = ffs_valloc; 703 ump->um_vfree = ffs_vfree; 704 ump->um_ifree = ffs_ifree; 705 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 706 if (fs->fs_sbsize < SBLOCKSIZE) 707 bp->b_flags |= B_INVAL | B_NOCACHE; 708 brelse(bp); 709 bp = NULL; 710 fs = ump->um_fs; 711 ffs_oldfscompat_read(fs, ump, sblockloc); 712 fs->fs_ronly = ronly; 713 size = fs->fs_cssize; 714 blks = howmany(size, fs->fs_fsize); 715 if (fs->fs_contigsumsize > 0) 716 size += fs->fs_ncg * sizeof(int32_t); 717 size += fs->fs_ncg * sizeof(u_int8_t); 718 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 719 fs->fs_csp = space; 720 for (i = 0; i < blks; i += fs->fs_frag) { 721 size = fs->fs_bsize; 722 if (i + fs->fs_frag > blks) 723 size = (blks - i) * fs->fs_fsize; 724 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 725 cred, &bp)) != 0) { 726 free(fs->fs_csp, M_UFSMNT); 727 goto out; 728 } 729 bcopy(bp->b_data, space, (u_int)size); 730 space = (char *)space + size; 731 brelse(bp); 732 bp = NULL; 733 } 734 if (fs->fs_contigsumsize > 0) { 735 fs->fs_maxcluster = lp = space; 736 for (i = 0; i < fs->fs_ncg; i++) 737 *lp++ = fs->fs_contigsumsize; 738 space = lp; 739 } 740 size = fs->fs_ncg * sizeof(u_int8_t); 741 fs->fs_contigdirs = (u_int8_t *)space; 742 bzero(fs->fs_contigdirs, size); 743 fs->fs_active = NULL; 744 mp->mnt_data = (qaddr_t)ump; 745 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 746 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 747 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 748 vfs_getvfs(&mp->mnt_stat.f_fsid)) 749 vfs_getnewfsid(mp); 750 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 751 mp->mnt_flag |= MNT_LOCAL; 752 if ((fs->fs_flags & FS_MULTILABEL) != 0) 753 #ifdef MAC 754 mp->mnt_flag |= MNT_MULTILABEL; 755 #else 756 printf( 757 "WARNING: %s: multilabel flag on fs but no MAC support\n", 758 fs->fs_fsmnt); 759 #endif 760 if ((fs->fs_flags & FS_ACLS) != 0) 761 #ifdef UFS_ACL 762 mp->mnt_flag |= MNT_ACLS; 763 #else 764 printf( 765 "WARNING: %s: ACLs flag on fs but no ACLs support\n", 766 fs->fs_fsmnt); 767 #endif 768 ump->um_mountp = mp; 769 ump->um_dev = dev; 770 ump->um_devvp = devvp; 771 ump->um_nindir = fs->fs_nindir; 772 ump->um_bptrtodb = fs->fs_fsbtodb; 773 ump->um_seqinc = fs->fs_frag; 774 for (i = 0; i < MAXQUOTAS; i++) 775 ump->um_quotas[i] = NULLVP; 776 #ifdef UFS_EXTATTR 777 ufs_extattr_uepm_init(&ump->um_extattr); 778 #endif 779 devvp->v_rdev->si_mountpoint = mp; 780 781 /* 782 * Set FS local "last mounted on" information (NULL pad) 783 */ 784 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 785 fs->fs_fsmnt, /* copy area*/ 786 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 787 &strsize); /* real size*/ 788 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 789 790 if( mp->mnt_flag & MNT_ROOTFS) { 791 /* 792 * Root mount; update timestamp in mount structure. 793 * this will be used by the common root mount code 794 * to update the system clock. 795 */ 796 mp->mnt_time = fs->fs_time; 797 } 798 799 if (ronly == 0) { 800 if ((fs->fs_flags & FS_DOSOFTDEP) && 801 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 802 free(fs->fs_csp, M_UFSMNT); 803 goto out; 804 } 805 if (fs->fs_snapinum[0] != 0) 806 ffs_snapshot_mount(mp); 807 fs->fs_fmod = 1; 808 fs->fs_clean = 0; 809 (void) ffs_sbupdate(ump, MNT_WAIT); 810 } 811 #ifdef UFS_EXTATTR 812 #ifdef UFS_EXTATTR_AUTOSTART 813 /* 814 * 815 * Auto-starting does the following: 816 * - check for /.attribute in the fs, and extattr_start if so 817 * - for each file in .attribute, enable that file with 818 * an attribute of the same name. 819 * Not clear how to report errors -- probably eat them. 820 * This would all happen while the filesystem was busy/not 821 * available, so would effectively be "atomic". 822 */ 823 (void) ufs_extattr_autostart(mp, td); 824 #endif /* !UFS_EXTATTR_AUTOSTART */ 825 #endif /* !UFS_EXTATTR */ 826 return (0); 827 out: 828 devvp->v_rdev->si_mountpoint = NULL; 829 if (bp) 830 brelse(bp); 831 /* XXX: see comment above VOP_OPEN */ 832 #ifdef notyet 833 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, td); 834 #else 835 (void)VOP_CLOSE(devvp, FREAD|FWRITE, cred, td); 836 #endif 837 if (ump) { 838 free(ump->um_fs, M_UFSMNT); 839 free(ump, M_UFSMNT); 840 mp->mnt_data = (qaddr_t)0; 841 } 842 return (error); 843 } 844 845 #include <sys/sysctl.h> 846 int bigcgs = 0; 847 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 848 849 /* 850 * Sanity checks for loading old filesystem superblocks. 851 * See ffs_oldfscompat_write below for unwound actions. 852 * 853 * XXX - Parts get retired eventually. 854 * Unfortunately new bits get added. 855 */ 856 static void 857 ffs_oldfscompat_read(fs, ump, sblockloc) 858 struct fs *fs; 859 struct ufsmount *ump; 860 ufs2_daddr_t sblockloc; 861 { 862 off_t maxfilesize; 863 864 /* 865 * If not yet done, update fs_flags location and value of fs_sblockloc. 866 */ 867 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 868 fs->fs_flags = fs->fs_old_flags; 869 fs->fs_old_flags |= FS_FLAGS_UPDATED; 870 fs->fs_sblockloc = sblockloc; 871 } 872 /* 873 * If not yet done, update UFS1 superblock with new wider fields. 874 */ 875 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 876 fs->fs_maxbsize = fs->fs_bsize; 877 fs->fs_time = fs->fs_old_time; 878 fs->fs_size = fs->fs_old_size; 879 fs->fs_dsize = fs->fs_old_dsize; 880 fs->fs_csaddr = fs->fs_old_csaddr; 881 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 882 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 883 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 884 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 885 } 886 if (fs->fs_magic == FS_UFS1_MAGIC && 887 fs->fs_old_inodefmt < FS_44INODEFMT) { 888 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 889 fs->fs_qbmask = ~fs->fs_bmask; 890 fs->fs_qfmask = ~fs->fs_fmask; 891 } 892 if (fs->fs_magic == FS_UFS1_MAGIC) { 893 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 894 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 895 if (fs->fs_maxfilesize > maxfilesize) 896 fs->fs_maxfilesize = maxfilesize; 897 } 898 /* Compatibility for old filesystems */ 899 if (fs->fs_avgfilesize <= 0) 900 fs->fs_avgfilesize = AVFILESIZ; 901 if (fs->fs_avgfpdir <= 0) 902 fs->fs_avgfpdir = AFPDIR; 903 if (bigcgs) { 904 fs->fs_save_cgsize = fs->fs_cgsize; 905 fs->fs_cgsize = fs->fs_bsize; 906 } 907 } 908 909 /* 910 * Unwinding superblock updates for old filesystems. 911 * See ffs_oldfscompat_read above for details. 912 * 913 * XXX - Parts get retired eventually. 914 * Unfortunately new bits get added. 915 */ 916 static void 917 ffs_oldfscompat_write(fs, ump) 918 struct fs *fs; 919 struct ufsmount *ump; 920 { 921 922 /* 923 * Copy back UFS2 updated fields that UFS1 inspects. 924 */ 925 if (fs->fs_magic == FS_UFS1_MAGIC) { 926 fs->fs_old_time = fs->fs_time; 927 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 928 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 929 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 930 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 931 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 932 } 933 if (bigcgs) { 934 fs->fs_cgsize = fs->fs_save_cgsize; 935 fs->fs_save_cgsize = 0; 936 } 937 } 938 939 /* 940 * unmount system call 941 */ 942 int 943 ffs_unmount(mp, mntflags, td) 944 struct mount *mp; 945 int mntflags; 946 struct thread *td; 947 { 948 struct ufsmount *ump = VFSTOUFS(mp); 949 struct fs *fs; 950 int error, flags; 951 952 flags = 0; 953 if (mntflags & MNT_FORCE) { 954 flags |= FORCECLOSE; 955 } 956 #ifdef UFS_EXTATTR 957 if ((error = ufs_extattr_stop(mp, td))) { 958 if (error != EOPNOTSUPP) 959 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 960 error); 961 } else { 962 ufs_extattr_uepm_destroy(&ump->um_extattr); 963 } 964 #endif 965 if (mp->mnt_flag & MNT_SOFTDEP) { 966 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 967 return (error); 968 } else { 969 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 970 return (error); 971 } 972 fs = ump->um_fs; 973 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 974 printf("%s: unmount pending error: blocks %jd files %d\n", 975 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 976 fs->fs_pendinginodes); 977 fs->fs_pendingblocks = 0; 978 fs->fs_pendinginodes = 0; 979 } 980 if (fs->fs_ronly == 0) { 981 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 982 error = ffs_sbupdate(ump, MNT_WAIT); 983 if (error) { 984 fs->fs_clean = 0; 985 return (error); 986 } 987 } 988 ump->um_devvp->v_rdev->si_mountpoint = NULL; 989 990 vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0); 991 /* XXX: see comment above VOP_OPEN */ 992 #ifdef notyet 993 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, 994 NOCRED, td); 995 #else 996 error = VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED, td); 997 #endif 998 999 vrele(ump->um_devvp); 1000 1001 free(fs->fs_csp, M_UFSMNT); 1002 free(fs, M_UFSMNT); 1003 free(ump, M_UFSMNT); 1004 mp->mnt_data = (qaddr_t)0; 1005 mp->mnt_flag &= ~MNT_LOCAL; 1006 return (error); 1007 } 1008 1009 /* 1010 * Flush out all the files in a filesystem. 1011 */ 1012 int 1013 ffs_flushfiles(mp, flags, td) 1014 struct mount *mp; 1015 int flags; 1016 struct thread *td; 1017 { 1018 struct ufsmount *ump; 1019 int error; 1020 1021 ump = VFSTOUFS(mp); 1022 #ifdef QUOTA 1023 if (mp->mnt_flag & MNT_QUOTA) { 1024 int i; 1025 error = vflush(mp, 0, SKIPSYSTEM|flags); 1026 if (error) 1027 return (error); 1028 for (i = 0; i < MAXQUOTAS; i++) { 1029 if (ump->um_quotas[i] == NULLVP) 1030 continue; 1031 quotaoff(td, mp, i); 1032 } 1033 /* 1034 * Here we fall through to vflush again to ensure 1035 * that we have gotten rid of all the system vnodes. 1036 */ 1037 } 1038 #endif 1039 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1040 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1041 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1042 return (error); 1043 ffs_snapshot_unmount(mp); 1044 /* 1045 * Here we fall through to vflush again to ensure 1046 * that we have gotten rid of all the system vnodes. 1047 */ 1048 } 1049 /* 1050 * Flush all the files. 1051 */ 1052 if ((error = vflush(mp, 0, flags)) != 0) 1053 return (error); 1054 /* 1055 * Flush filesystem metadata. 1056 */ 1057 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1058 error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td); 1059 VOP_UNLOCK(ump->um_devvp, 0, td); 1060 return (error); 1061 } 1062 1063 /* 1064 * Get filesystem statistics. 1065 */ 1066 int 1067 ffs_statfs(mp, sbp, td) 1068 struct mount *mp; 1069 struct statfs *sbp; 1070 struct thread *td; 1071 { 1072 struct ufsmount *ump; 1073 struct fs *fs; 1074 1075 ump = VFSTOUFS(mp); 1076 fs = ump->um_fs; 1077 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1078 panic("ffs_statfs"); 1079 sbp->f_bsize = fs->fs_fsize; 1080 sbp->f_iosize = fs->fs_bsize; 1081 sbp->f_blocks = fs->fs_dsize; 1082 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1083 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1084 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1085 dbtofsb(fs, fs->fs_pendingblocks); 1086 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1087 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1088 if (sbp != &mp->mnt_stat) { 1089 sbp->f_type = mp->mnt_vfc->vfc_typenum; 1090 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 1091 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 1092 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 1093 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 1094 } 1095 return (0); 1096 } 1097 1098 /* 1099 * Go through the disk queues to initiate sandbagged IO; 1100 * go through the inodes to write those that have been modified; 1101 * initiate the writing of the super block if it has been modified. 1102 * 1103 * Note: we are always called with the filesystem marked `MPBUSY'. 1104 */ 1105 int 1106 ffs_sync(mp, waitfor, cred, td) 1107 struct mount *mp; 1108 int waitfor; 1109 struct ucred *cred; 1110 struct thread *td; 1111 { 1112 struct vnode *nvp, *vp, *devvp; 1113 struct inode *ip; 1114 struct ufsmount *ump = VFSTOUFS(mp); 1115 struct fs *fs; 1116 int error, count, wait, lockreq, allerror = 0; 1117 1118 fs = ump->um_fs; 1119 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1120 printf("fs = %s\n", fs->fs_fsmnt); 1121 panic("ffs_sync: rofs mod"); 1122 } 1123 /* 1124 * Write back each (modified) inode. 1125 */ 1126 wait = 0; 1127 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1128 if (waitfor == MNT_WAIT) { 1129 wait = 1; 1130 lockreq = LK_EXCLUSIVE; 1131 } 1132 mtx_lock(&mntvnode_mtx); 1133 loop: 1134 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 1135 /* 1136 * If the vnode that we are about to sync is no longer 1137 * associated with this mount point, start over. 1138 */ 1139 if (vp->v_mount != mp) 1140 goto loop; 1141 1142 /* 1143 * Depend on the mntvnode_slock to keep things stable enough 1144 * for a quick test. Since there might be hundreds of 1145 * thousands of vnodes, we cannot afford even a subroutine 1146 * call unless there's a good chance that we have work to do. 1147 */ 1148 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 1149 ip = VTOI(vp); 1150 if (vp->v_type == VNON || ((ip->i_flag & 1151 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1152 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1153 continue; 1154 } 1155 if (vp->v_type != VCHR) { 1156 mtx_unlock(&mntvnode_mtx); 1157 if ((error = vget(vp, lockreq, td)) != 0) { 1158 mtx_lock(&mntvnode_mtx); 1159 if (error == ENOENT) 1160 goto loop; 1161 } else { 1162 if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0) 1163 allerror = error; 1164 VOP_UNLOCK(vp, 0, td); 1165 vrele(vp); 1166 mtx_lock(&mntvnode_mtx); 1167 } 1168 } else { 1169 mtx_unlock(&mntvnode_mtx); 1170 UFS_UPDATE(vp, wait); 1171 mtx_lock(&mntvnode_mtx); 1172 } 1173 if (TAILQ_NEXT(vp, v_nmntvnodes) != nvp) 1174 goto loop; 1175 } 1176 mtx_unlock(&mntvnode_mtx); 1177 /* 1178 * Force stale filesystem control information to be flushed. 1179 */ 1180 if (waitfor == MNT_WAIT) { 1181 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1182 allerror = error; 1183 /* Flushed work items may create new vnodes to clean */ 1184 if (allerror == 0 && count) { 1185 mtx_lock(&mntvnode_mtx); 1186 goto loop; 1187 } 1188 } 1189 #ifdef QUOTA 1190 qsync(mp); 1191 #endif 1192 devvp = ump->um_devvp; 1193 VI_LOCK(devvp); 1194 if (waitfor != MNT_LAZY && 1195 (devvp->v_numoutput > 0 || TAILQ_FIRST(&devvp->v_dirtyblkhd))) { 1196 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1197 if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0) 1198 allerror = error; 1199 VOP_UNLOCK(devvp, 0, td); 1200 if (allerror == 0 && waitfor == MNT_WAIT) { 1201 mtx_lock(&mntvnode_mtx); 1202 goto loop; 1203 } 1204 } else 1205 VI_UNLOCK(devvp); 1206 /* 1207 * Write back modified superblock. 1208 */ 1209 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1210 allerror = error; 1211 return (allerror); 1212 } 1213 1214 int 1215 ffs_vget(mp, ino, flags, vpp) 1216 struct mount *mp; 1217 ino_t ino; 1218 int flags; 1219 struct vnode **vpp; 1220 { 1221 struct thread *td = curthread; /* XXX */ 1222 struct fs *fs; 1223 struct inode *ip; 1224 struct ufsmount *ump; 1225 struct buf *bp; 1226 struct vnode *vp; 1227 dev_t dev; 1228 int error; 1229 1230 ump = VFSTOUFS(mp); 1231 dev = ump->um_dev; 1232 1233 /* 1234 * We do not lock vnode creation as it is believed to be too 1235 * expensive for such rare case as simultaneous creation of vnode 1236 * for same ino by different processes. We just allow them to race 1237 * and check later to decide who wins. Let the race begin! 1238 */ 1239 if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) 1240 return (error); 1241 if (*vpp != NULL) 1242 return (0); 1243 1244 /* 1245 * If this MALLOC() is performed after the getnewvnode() 1246 * it might block, leaving a vnode with a NULL v_data to be 1247 * found by ffs_sync() if a sync happens to fire right then, 1248 * which will cause a panic because ffs_sync() blindly 1249 * dereferences vp->v_data (as well it should). 1250 */ 1251 ip = uma_zalloc(uma_inode, M_WAITOK); 1252 1253 /* Allocate a new vnode/inode. */ 1254 error = getnewvnode("ufs", mp, ffs_vnodeop_p, &vp); 1255 if (error) { 1256 *vpp = NULL; 1257 uma_zfree(uma_inode, ip); 1258 return (error); 1259 } 1260 bzero((caddr_t)ip, sizeof(struct inode)); 1261 /* 1262 * FFS supports recursive locking. 1263 */ 1264 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1265 vp->v_data = ip; 1266 ip->i_vnode = vp; 1267 ip->i_ump = ump; 1268 ip->i_fs = fs = ump->um_fs; 1269 ip->i_dev = dev; 1270 ip->i_number = ino; 1271 #ifdef QUOTA 1272 { 1273 int i; 1274 for (i = 0; i < MAXQUOTAS; i++) 1275 ip->i_dquot[i] = NODQUOT; 1276 } 1277 #endif 1278 /* 1279 * Exclusively lock the vnode before adding to hash. Note, that we 1280 * must not release nor downgrade the lock (despite flags argument 1281 * says) till it is fully initialized. 1282 */ 1283 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td); 1284 1285 /* 1286 * Atomicaly (in terms of ufs_hash operations) check the hash for 1287 * duplicate of vnode being created and add it to the hash. If a 1288 * duplicate vnode was found, it will be vget()ed from hash for us. 1289 */ 1290 if ((error = ufs_ihashins(ip, flags, vpp)) != 0) { 1291 vput(vp); 1292 *vpp = NULL; 1293 return (error); 1294 } 1295 1296 /* We lost the race, then throw away our vnode and return existing */ 1297 if (*vpp != NULL) { 1298 vput(vp); 1299 return (0); 1300 } 1301 1302 /* Read in the disk contents for the inode, copy into the inode. */ 1303 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1304 (int)fs->fs_bsize, NOCRED, &bp); 1305 if (error) { 1306 /* 1307 * The inode does not contain anything useful, so it would 1308 * be misleading to leave it on its hash chain. With mode 1309 * still zero, it will be unlinked and returned to the free 1310 * list by vput(). 1311 */ 1312 brelse(bp); 1313 vput(vp); 1314 *vpp = NULL; 1315 return (error); 1316 } 1317 if (ip->i_ump->um_fstype == UFS1) 1318 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1319 else 1320 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1321 ffs_load_inode(bp, ip, fs, ino); 1322 if (DOINGSOFTDEP(vp)) 1323 softdep_load_inodeblock(ip); 1324 else 1325 ip->i_effnlink = ip->i_nlink; 1326 bqrelse(bp); 1327 1328 /* 1329 * Initialize the vnode from the inode, check for aliases. 1330 * Note that the underlying vnode may have changed. 1331 */ 1332 error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1333 if (error) { 1334 vput(vp); 1335 *vpp = NULL; 1336 return (error); 1337 } 1338 /* 1339 * Finish inode initialization now that aliasing has been resolved. 1340 */ 1341 ip->i_devvp = ump->um_devvp; 1342 VREF(ip->i_devvp); 1343 /* 1344 * Set up a generation number for this inode if it does not 1345 * already have one. This should only happen on old filesystems. 1346 */ 1347 if (ip->i_gen == 0) { 1348 ip->i_gen = arc4random() / 2 + 1; 1349 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1350 ip->i_flag |= IN_MODIFIED; 1351 DIP(ip, i_gen) = ip->i_gen; 1352 } 1353 } 1354 /* 1355 * Ensure that uid and gid are correct. This is a temporary 1356 * fix until fsck has been changed to do the update. 1357 */ 1358 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1359 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1360 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1361 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1362 } /* XXX */ 1363 1364 #ifdef MAC 1365 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1366 /* 1367 * If this vnode is already allocated, and we're running 1368 * multi-label, attempt to perform a label association 1369 * from the extended attributes on the inode. 1370 */ 1371 error = mac_associate_vnode_extattr(mp, vp); 1372 if (error) { 1373 /* ufs_inactive will release ip->i_devvp ref. */ 1374 vput(vp); 1375 *vpp = NULL; 1376 return (error); 1377 } 1378 } 1379 #endif 1380 1381 *vpp = vp; 1382 return (0); 1383 } 1384 1385 /* 1386 * File handle to vnode 1387 * 1388 * Have to be really careful about stale file handles: 1389 * - check that the inode number is valid 1390 * - call ffs_vget() to get the locked inode 1391 * - check for an unallocated inode (i_mode == 0) 1392 * - check that the given client host has export rights and return 1393 * those rights via. exflagsp and credanonp 1394 */ 1395 int 1396 ffs_fhtovp(mp, fhp, vpp) 1397 struct mount *mp; 1398 struct fid *fhp; 1399 struct vnode **vpp; 1400 { 1401 struct ufid *ufhp; 1402 struct fs *fs; 1403 1404 ufhp = (struct ufid *)fhp; 1405 fs = VFSTOUFS(mp)->um_fs; 1406 if (ufhp->ufid_ino < ROOTINO || 1407 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1408 return (ESTALE); 1409 return (ufs_fhtovp(mp, ufhp, vpp)); 1410 } 1411 1412 /* 1413 * Vnode pointer to File handle 1414 */ 1415 /* ARGSUSED */ 1416 int 1417 ffs_vptofh(vp, fhp) 1418 struct vnode *vp; 1419 struct fid *fhp; 1420 { 1421 struct inode *ip; 1422 struct ufid *ufhp; 1423 1424 ip = VTOI(vp); 1425 ufhp = (struct ufid *)fhp; 1426 ufhp->ufid_len = sizeof(struct ufid); 1427 ufhp->ufid_ino = ip->i_number; 1428 ufhp->ufid_gen = ip->i_gen; 1429 return (0); 1430 } 1431 1432 /* 1433 * Initialize the filesystem. 1434 */ 1435 static int 1436 ffs_init(vfsp) 1437 struct vfsconf *vfsp; 1438 { 1439 1440 softdep_initialize(); 1441 return (ufs_init(vfsp)); 1442 } 1443 1444 /* 1445 * Undo the work of ffs_init(). 1446 */ 1447 static int 1448 ffs_uninit(vfsp) 1449 struct vfsconf *vfsp; 1450 { 1451 int ret; 1452 1453 ret = ufs_uninit(vfsp); 1454 softdep_uninitialize(); 1455 return (ret); 1456 } 1457 1458 /* 1459 * Write a superblock and associated information back to disk. 1460 */ 1461 static int 1462 ffs_sbupdate(mp, waitfor) 1463 struct ufsmount *mp; 1464 int waitfor; 1465 { 1466 struct fs *fs = mp->um_fs; 1467 struct buf *bp; 1468 int blks; 1469 void *space; 1470 int i, size, error, allerror = 0; 1471 1472 if (fs->fs_ronly == 1 && 1473 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1474 (MNT_RDONLY | MNT_UPDATE)) 1475 panic("ffs_sbupdate: write read-only filesystem"); 1476 /* 1477 * First write back the summary information. 1478 */ 1479 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1480 space = fs->fs_csp; 1481 for (i = 0; i < blks; i += fs->fs_frag) { 1482 size = fs->fs_bsize; 1483 if (i + fs->fs_frag > blks) 1484 size = (blks - i) * fs->fs_fsize; 1485 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1486 size, 0, 0); 1487 bcopy(space, bp->b_data, (u_int)size); 1488 space = (char *)space + size; 1489 if (waitfor != MNT_WAIT) 1490 bawrite(bp); 1491 else if ((error = bwrite(bp)) != 0) 1492 allerror = error; 1493 } 1494 /* 1495 * Now write back the superblock itself. If any errors occurred 1496 * up to this point, then fail so that the superblock avoids 1497 * being written out as clean. 1498 */ 1499 if (allerror) 1500 return (allerror); 1501 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1502 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1503 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1504 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1505 fs->fs_sblockloc = SBLOCK_UFS1; 1506 } 1507 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1508 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1509 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1510 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1511 fs->fs_sblockloc = SBLOCK_UFS2; 1512 } 1513 bp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1514 0, 0); 1515 fs->fs_fmod = 0; 1516 fs->fs_time = time_second; 1517 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1518 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1519 if (waitfor != MNT_WAIT) 1520 bawrite(bp); 1521 else if ((error = bwrite(bp)) != 0) 1522 allerror = error; 1523 return (allerror); 1524 } 1525 1526 static int 1527 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1528 int attrnamespace, const char *attrname, struct thread *td) 1529 { 1530 1531 #ifdef UFS_EXTATTR 1532 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1533 attrname, td)); 1534 #else 1535 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1536 attrname, td)); 1537 #endif 1538 } 1539 1540 static void 1541 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1542 { 1543 1544 if (ump->um_fstype == UFS1) 1545 uma_zfree(uma_ufs1, ip->i_din1); 1546 else 1547 uma_zfree(uma_ufs2, ip->i_din1); 1548 uma_zfree(uma_inode, ip); 1549 } 1550