ffs_vfsops.c revision 121874
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 121874 2003-11-02 04:52:53Z kan $"); 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 VOP_UNLOCK(vp, 0, td); 541 vrele(vp); 542 mtx_lock(&mntvnode_mtx); 543 } 544 mtx_unlock(&mntvnode_mtx); 545 return (0); 546} 547 548/* 549 * Possible superblock locations ordered from most to least likely. 550 */ 551static int sblock_try[] = SBLOCKSEARCH; 552 553/* 554 * Common code for mount and mountroot 555 */ 556static int 557ffs_mountfs(devvp, mp, td) 558 struct vnode *devvp; 559 struct mount *mp; 560 struct thread *td; 561{ 562 struct ufsmount *ump; 563 struct buf *bp; 564 struct fs *fs; 565 dev_t dev; 566 void *space; 567 ufs2_daddr_t sblockloc; 568 int error, i, blks, size, ronly; 569 int32_t *lp; 570 struct ucred *cred; 571 size_t strsize; 572 int ncount; 573 574 dev = devvp->v_rdev; 575 cred = td ? td->td_ucred : NOCRED; 576 /* 577 * Disallow multiple mounts of the same device. 578 * Disallow mounting of a device that is currently in use 579 * (except for root, which might share swap device for miniroot). 580 * Flush out any old buffers remaining from a previous use. 581 */ 582 error = vfs_mountedon(devvp); 583 if (error) 584 return (error); 585 ncount = vcount(devvp); 586 587 if (ncount > 1 && devvp != rootvp) 588 return (EBUSY); 589 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 590 error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0); 591 VOP_UNLOCK(devvp, 0, td); 592 if (error) 593 return (error); 594 595 /* 596 * Only VMIO the backing device if the backing device is a real 597 * block device. 598 * Note that it is optional that the backing device be VMIOed. This 599 * increases the opportunity for metadata caching. 600 */ 601 if (vn_isdisk(devvp, NULL)) { 602 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 603 vfs_object_create(devvp, td, cred); 604 VOP_UNLOCK(devvp, 0, td); 605 } 606 607 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 608 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 609 /* 610 * XXX: We don't re-VOP_OPEN in FREAD|FWRITE mode if the filesystem 611 * XXX: is subsequently remounted, so open it FREAD|FWRITE from the 612 * XXX: start to avoid getting trashed later on. 613 */ 614#ifdef notyet 615 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td, -1); 616#else 617 error = VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, td, -1); 618#endif 619 VOP_UNLOCK(devvp, 0, td); 620 if (error) 621 return (error); 622 if (devvp->v_rdev->si_iosize_max != 0) 623 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 624 if (mp->mnt_iosize_max > MAXPHYS) 625 mp->mnt_iosize_max = MAXPHYS; 626 627 bp = NULL; 628 ump = NULL; 629 fs = NULL; 630 sblockloc = 0; 631 /* 632 * Try reading the superblock in each of its possible locations. 633 */ 634 for (i = 0; sblock_try[i] != -1; i++) { 635 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 636 cred, &bp)) != 0) 637 goto out; 638 fs = (struct fs *)bp->b_data; 639 sblockloc = sblock_try[i]; 640 if ((fs->fs_magic == FS_UFS1_MAGIC || 641 (fs->fs_magic == FS_UFS2_MAGIC && 642 (fs->fs_sblockloc == sblockloc || 643 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 644 fs->fs_bsize <= MAXBSIZE && 645 fs->fs_bsize >= sizeof(struct fs)) 646 break; 647 brelse(bp); 648 bp = NULL; 649 } 650 if (sblock_try[i] == -1) { 651 error = EINVAL; /* XXX needs translation */ 652 goto out; 653 } 654 fs->fs_fmod = 0; 655 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 656 fs->fs_flags &= ~FS_UNCLEAN; 657 if (fs->fs_clean == 0) { 658 fs->fs_flags |= FS_UNCLEAN; 659 if (ronly || (mp->mnt_flag & MNT_FORCE) || 660 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 661 (fs->fs_flags & FS_DOSOFTDEP))) { 662 printf( 663"WARNING: %s was not properly dismounted\n", 664 fs->fs_fsmnt); 665 } else { 666 printf( 667"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 668 fs->fs_fsmnt); 669 error = EPERM; 670 goto out; 671 } 672 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 673 (mp->mnt_flag & MNT_FORCE)) { 674 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 675 (intmax_t)fs->fs_pendingblocks, 676 fs->fs_pendinginodes); 677 fs->fs_pendingblocks = 0; 678 fs->fs_pendinginodes = 0; 679 } 680 } 681 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 682 printf("%s: mount pending error: blocks %jd files %d\n", 683 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 684 fs->fs_pendinginodes); 685 fs->fs_pendingblocks = 0; 686 fs->fs_pendinginodes = 0; 687 } 688 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 689 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 690 M_WAITOK); 691 if (fs->fs_magic == FS_UFS1_MAGIC) { 692 ump->um_fstype = UFS1; 693 ump->um_balloc = ffs_balloc_ufs1; 694 } else { 695 ump->um_fstype = UFS2; 696 ump->um_balloc = ffs_balloc_ufs2; 697 } 698 ump->um_blkatoff = ffs_blkatoff; 699 ump->um_truncate = ffs_truncate; 700 ump->um_update = ffs_update; 701 ump->um_valloc = ffs_valloc; 702 ump->um_vfree = ffs_vfree; 703 ump->um_ifree = ffs_ifree; 704 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 705 if (fs->fs_sbsize < SBLOCKSIZE) 706 bp->b_flags |= B_INVAL | B_NOCACHE; 707 brelse(bp); 708 bp = NULL; 709 fs = ump->um_fs; 710 ffs_oldfscompat_read(fs, ump, sblockloc); 711 fs->fs_ronly = ronly; 712 size = fs->fs_cssize; 713 blks = howmany(size, fs->fs_fsize); 714 if (fs->fs_contigsumsize > 0) 715 size += fs->fs_ncg * sizeof(int32_t); 716 size += fs->fs_ncg * sizeof(u_int8_t); 717 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 718 fs->fs_csp = space; 719 for (i = 0; i < blks; i += fs->fs_frag) { 720 size = fs->fs_bsize; 721 if (i + fs->fs_frag > blks) 722 size = (blks - i) * fs->fs_fsize; 723 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 724 cred, &bp)) != 0) { 725 free(fs->fs_csp, M_UFSMNT); 726 goto out; 727 } 728 bcopy(bp->b_data, space, (u_int)size); 729 space = (char *)space + size; 730 brelse(bp); 731 bp = NULL; 732 } 733 if (fs->fs_contigsumsize > 0) { 734 fs->fs_maxcluster = lp = space; 735 for (i = 0; i < fs->fs_ncg; i++) 736 *lp++ = fs->fs_contigsumsize; 737 space = lp; 738 } 739 size = fs->fs_ncg * sizeof(u_int8_t); 740 fs->fs_contigdirs = (u_int8_t *)space; 741 bzero(fs->fs_contigdirs, size); 742 fs->fs_active = NULL; 743 mp->mnt_data = (qaddr_t)ump; 744 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 745 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 746 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 747 vfs_getvfs(&mp->mnt_stat.f_fsid)) 748 vfs_getnewfsid(mp); 749 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 750 mp->mnt_flag |= MNT_LOCAL; 751 if ((fs->fs_flags & FS_MULTILABEL) != 0) 752#ifdef MAC 753 mp->mnt_flag |= MNT_MULTILABEL; 754#else 755 printf( 756"WARNING: %s: multilabel flag on fs but no MAC support\n", 757 fs->fs_fsmnt); 758#endif 759 if ((fs->fs_flags & FS_ACLS) != 0) 760#ifdef UFS_ACL 761 mp->mnt_flag |= MNT_ACLS; 762#else 763 printf( 764"WARNING: %s: ACLs flag on fs but no ACLs support\n", 765 fs->fs_fsmnt); 766#endif 767 ump->um_mountp = mp; 768 ump->um_dev = dev; 769 ump->um_devvp = devvp; 770 ump->um_nindir = fs->fs_nindir; 771 ump->um_bptrtodb = fs->fs_fsbtodb; 772 ump->um_seqinc = fs->fs_frag; 773 for (i = 0; i < MAXQUOTAS; i++) 774 ump->um_quotas[i] = NULLVP; 775#ifdef UFS_EXTATTR 776 ufs_extattr_uepm_init(&ump->um_extattr); 777#endif 778 devvp->v_rdev->si_mountpoint = mp; 779 780 /* 781 * Set FS local "last mounted on" information (NULL pad) 782 */ 783 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 784 fs->fs_fsmnt, /* copy area*/ 785 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 786 &strsize); /* real size*/ 787 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 788 789 if( mp->mnt_flag & MNT_ROOTFS) { 790 /* 791 * Root mount; update timestamp in mount structure. 792 * this will be used by the common root mount code 793 * to update the system clock. 794 */ 795 mp->mnt_time = fs->fs_time; 796 } 797 798 if (ronly == 0) { 799 if ((fs->fs_flags & FS_DOSOFTDEP) && 800 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 801 free(fs->fs_csp, M_UFSMNT); 802 goto out; 803 } 804 if (fs->fs_snapinum[0] != 0) 805 ffs_snapshot_mount(mp); 806 fs->fs_fmod = 1; 807 fs->fs_clean = 0; 808 (void) ffs_sbupdate(ump, MNT_WAIT); 809 } 810#ifdef UFS_EXTATTR 811#ifdef UFS_EXTATTR_AUTOSTART 812 /* 813 * 814 * Auto-starting does the following: 815 * - check for /.attribute in the fs, and extattr_start if so 816 * - for each file in .attribute, enable that file with 817 * an attribute of the same name. 818 * Not clear how to report errors -- probably eat them. 819 * This would all happen while the filesystem was busy/not 820 * available, so would effectively be "atomic". 821 */ 822 (void) ufs_extattr_autostart(mp, td); 823#endif /* !UFS_EXTATTR_AUTOSTART */ 824#endif /* !UFS_EXTATTR */ 825 return (0); 826out: 827 devvp->v_rdev->si_mountpoint = NULL; 828 if (bp) 829 brelse(bp); 830 /* XXX: see comment above VOP_OPEN */ 831#ifdef notyet 832 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, td); 833#else 834 (void)VOP_CLOSE(devvp, FREAD|FWRITE, cred, td); 835#endif 836 if (ump) { 837 free(ump->um_fs, M_UFSMNT); 838 free(ump, M_UFSMNT); 839 mp->mnt_data = (qaddr_t)0; 840 } 841 return (error); 842} 843 844#include <sys/sysctl.h> 845int bigcgs = 0; 846SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 847 848/* 849 * Sanity checks for loading old filesystem superblocks. 850 * See ffs_oldfscompat_write below for unwound actions. 851 * 852 * XXX - Parts get retired eventually. 853 * Unfortunately new bits get added. 854 */ 855static void 856ffs_oldfscompat_read(fs, ump, sblockloc) 857 struct fs *fs; 858 struct ufsmount *ump; 859 ufs2_daddr_t sblockloc; 860{ 861 off_t maxfilesize; 862 863 /* 864 * If not yet done, update fs_flags location and value of fs_sblockloc. 865 */ 866 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 867 fs->fs_flags = fs->fs_old_flags; 868 fs->fs_old_flags |= FS_FLAGS_UPDATED; 869 fs->fs_sblockloc = sblockloc; 870 } 871 /* 872 * If not yet done, update UFS1 superblock with new wider fields. 873 */ 874 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 875 fs->fs_maxbsize = fs->fs_bsize; 876 fs->fs_time = fs->fs_old_time; 877 fs->fs_size = fs->fs_old_size; 878 fs->fs_dsize = fs->fs_old_dsize; 879 fs->fs_csaddr = fs->fs_old_csaddr; 880 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 881 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 882 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 883 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 884 } 885 if (fs->fs_magic == FS_UFS1_MAGIC && 886 fs->fs_old_inodefmt < FS_44INODEFMT) { 887 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 888 fs->fs_qbmask = ~fs->fs_bmask; 889 fs->fs_qfmask = ~fs->fs_fmask; 890 } 891 if (fs->fs_magic == FS_UFS1_MAGIC) { 892 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 893 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 894 if (fs->fs_maxfilesize > maxfilesize) 895 fs->fs_maxfilesize = maxfilesize; 896 } 897 /* Compatibility for old filesystems */ 898 if (fs->fs_avgfilesize <= 0) 899 fs->fs_avgfilesize = AVFILESIZ; 900 if (fs->fs_avgfpdir <= 0) 901 fs->fs_avgfpdir = AFPDIR; 902 if (bigcgs) { 903 fs->fs_save_cgsize = fs->fs_cgsize; 904 fs->fs_cgsize = fs->fs_bsize; 905 } 906} 907 908/* 909 * Unwinding superblock updates for old filesystems. 910 * See ffs_oldfscompat_read above for details. 911 * 912 * XXX - Parts get retired eventually. 913 * Unfortunately new bits get added. 914 */ 915static void 916ffs_oldfscompat_write(fs, ump) 917 struct fs *fs; 918 struct ufsmount *ump; 919{ 920 921 /* 922 * Copy back UFS2 updated fields that UFS1 inspects. 923 */ 924 if (fs->fs_magic == FS_UFS1_MAGIC) { 925 fs->fs_old_time = fs->fs_time; 926 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 927 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 928 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 929 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 930 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 931 } 932 if (bigcgs) { 933 fs->fs_cgsize = fs->fs_save_cgsize; 934 fs->fs_save_cgsize = 0; 935 } 936} 937 938/* 939 * unmount system call 940 */ 941int 942ffs_unmount(mp, mntflags, td) 943 struct mount *mp; 944 int mntflags; 945 struct thread *td; 946{ 947 struct ufsmount *ump = VFSTOUFS(mp); 948 struct fs *fs; 949 int error, flags; 950 951 flags = 0; 952 if (mntflags & MNT_FORCE) { 953 flags |= FORCECLOSE; 954 } 955#ifdef UFS_EXTATTR 956 if ((error = ufs_extattr_stop(mp, td))) { 957 if (error != EOPNOTSUPP) 958 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 959 error); 960 } else { 961 ufs_extattr_uepm_destroy(&ump->um_extattr); 962 } 963#endif 964 if (mp->mnt_flag & MNT_SOFTDEP) { 965 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 966 return (error); 967 } else { 968 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 969 return (error); 970 } 971 fs = ump->um_fs; 972 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 973 printf("%s: unmount pending error: blocks %jd files %d\n", 974 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 975 fs->fs_pendinginodes); 976 fs->fs_pendingblocks = 0; 977 fs->fs_pendinginodes = 0; 978 } 979 if (fs->fs_ronly == 0) { 980 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 981 error = ffs_sbupdate(ump, MNT_WAIT); 982 if (error) { 983 fs->fs_clean = 0; 984 return (error); 985 } 986 } 987 ump->um_devvp->v_rdev->si_mountpoint = NULL; 988 989 vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0); 990 /* XXX: see comment above VOP_OPEN */ 991#ifdef notyet 992 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, 993 NOCRED, td); 994#else 995 error = VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED, td); 996#endif 997 998 vrele(ump->um_devvp); 999 1000 free(fs->fs_csp, M_UFSMNT); 1001 free(fs, M_UFSMNT); 1002 free(ump, M_UFSMNT); 1003 mp->mnt_data = (qaddr_t)0; 1004 mp->mnt_flag &= ~MNT_LOCAL; 1005 return (error); 1006} 1007 1008/* 1009 * Flush out all the files in a filesystem. 1010 */ 1011int 1012ffs_flushfiles(mp, flags, td) 1013 struct mount *mp; 1014 int flags; 1015 struct thread *td; 1016{ 1017 struct ufsmount *ump; 1018 int error; 1019 1020 ump = VFSTOUFS(mp); 1021#ifdef QUOTA 1022 if (mp->mnt_flag & MNT_QUOTA) { 1023 int i; 1024 error = vflush(mp, 0, SKIPSYSTEM|flags); 1025 if (error) 1026 return (error); 1027 for (i = 0; i < MAXQUOTAS; i++) { 1028 if (ump->um_quotas[i] == NULLVP) 1029 continue; 1030 quotaoff(td, mp, i); 1031 } 1032 /* 1033 * Here we fall through to vflush again to ensure 1034 * that we have gotten rid of all the system vnodes. 1035 */ 1036 } 1037#endif 1038 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1039 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1040 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1041 return (error); 1042 ffs_snapshot_unmount(mp); 1043 /* 1044 * Here we fall through to vflush again to ensure 1045 * that we have gotten rid of all the system vnodes. 1046 */ 1047 } 1048 /* 1049 * Flush all the files. 1050 */ 1051 if ((error = vflush(mp, 0, flags)) != 0) 1052 return (error); 1053 /* 1054 * Flush filesystem metadata. 1055 */ 1056 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1057 error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td); 1058 VOP_UNLOCK(ump->um_devvp, 0, td); 1059 return (error); 1060} 1061 1062/* 1063 * Get filesystem statistics. 1064 */ 1065int 1066ffs_statfs(mp, sbp, td) 1067 struct mount *mp; 1068 struct statfs *sbp; 1069 struct thread *td; 1070{ 1071 struct ufsmount *ump; 1072 struct fs *fs; 1073 1074 ump = VFSTOUFS(mp); 1075 fs = ump->um_fs; 1076 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1077 panic("ffs_statfs"); 1078 sbp->f_bsize = fs->fs_fsize; 1079 sbp->f_iosize = fs->fs_bsize; 1080 sbp->f_blocks = fs->fs_dsize; 1081 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1082 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1083 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1084 dbtofsb(fs, fs->fs_pendingblocks); 1085 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1086 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1087 if (sbp != &mp->mnt_stat) { 1088 sbp->f_type = mp->mnt_vfc->vfc_typenum; 1089 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 1090 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 1091 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 1092 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 1093 } 1094 return (0); 1095} 1096 1097/* 1098 * Go through the disk queues to initiate sandbagged IO; 1099 * go through the inodes to write those that have been modified; 1100 * initiate the writing of the super block if it has been modified. 1101 * 1102 * Note: we are always called with the filesystem marked `MPBUSY'. 1103 */ 1104int 1105ffs_sync(mp, waitfor, cred, td) 1106 struct mount *mp; 1107 int waitfor; 1108 struct ucred *cred; 1109 struct thread *td; 1110{ 1111 struct vnode *nvp, *vp, *devvp; 1112 struct inode *ip; 1113 struct ufsmount *ump = VFSTOUFS(mp); 1114 struct fs *fs; 1115 int error, count, wait, lockreq, allerror = 0; 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 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 VI_LOCK(vp); 1150 if (vp->v_iflag & VI_XLOCK) { 1151 VI_UNLOCK(vp); 1152 continue; 1153 } 1154 ip = VTOI(vp); 1155 if (vp->v_type == VNON || ((ip->i_flag & 1156 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1157 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1158 VI_UNLOCK(vp); 1159 continue; 1160 } 1161 mtx_unlock(&mntvnode_mtx); 1162 if ((error = vget(vp, lockreq, td)) != 0) { 1163 mtx_lock(&mntvnode_mtx); 1164 if (error == ENOENT) 1165 goto loop; 1166 continue; 1167 } 1168 if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0) 1169 allerror = error; 1170 VOP_UNLOCK(vp, 0, td); 1171 vrele(vp); 1172 mtx_lock(&mntvnode_mtx); 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 1214int 1215ffs_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. 1340 */ 1341 VREF(ip->i_devvp); 1342 /* 1343 * Set up a generation number for this inode if it does not 1344 * already have one. This should only happen on old filesystems. 1345 */ 1346 if (ip->i_gen == 0) { 1347 ip->i_gen = arc4random() / 2 + 1; 1348 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1349 ip->i_flag |= IN_MODIFIED; 1350 DIP(ip, i_gen) = ip->i_gen; 1351 } 1352 } 1353 /* 1354 * Ensure that uid and gid are correct. This is a temporary 1355 * fix until fsck has been changed to do the update. 1356 */ 1357 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1358 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1359 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1360 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1361 } /* XXX */ 1362 1363#ifdef MAC 1364 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1365 /* 1366 * If this vnode is already allocated, and we're running 1367 * multi-label, attempt to perform a label association 1368 * from the extended attributes on the inode. 1369 */ 1370 error = mac_associate_vnode_extattr(mp, vp); 1371 if (error) { 1372 /* ufs_inactive will release ip->i_devvp ref. */ 1373 vput(vp); 1374 *vpp = NULL; 1375 return (error); 1376 } 1377 } 1378#endif 1379 1380 *vpp = vp; 1381 return (0); 1382} 1383 1384/* 1385 * File handle to vnode 1386 * 1387 * Have to be really careful about stale file handles: 1388 * - check that the inode number is valid 1389 * - call ffs_vget() to get the locked inode 1390 * - check for an unallocated inode (i_mode == 0) 1391 * - check that the given client host has export rights and return 1392 * those rights via. exflagsp and credanonp 1393 */ 1394int 1395ffs_fhtovp(mp, fhp, vpp) 1396 struct mount *mp; 1397 struct fid *fhp; 1398 struct vnode **vpp; 1399{ 1400 struct ufid *ufhp; 1401 struct fs *fs; 1402 1403 ufhp = (struct ufid *)fhp; 1404 fs = VFSTOUFS(mp)->um_fs; 1405 if (ufhp->ufid_ino < ROOTINO || 1406 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1407 return (ESTALE); 1408 return (ufs_fhtovp(mp, ufhp, vpp)); 1409} 1410 1411/* 1412 * Vnode pointer to File handle 1413 */ 1414/* ARGSUSED */ 1415int 1416ffs_vptofh(vp, fhp) 1417 struct vnode *vp; 1418 struct fid *fhp; 1419{ 1420 struct inode *ip; 1421 struct ufid *ufhp; 1422 1423 ip = VTOI(vp); 1424 ufhp = (struct ufid *)fhp; 1425 ufhp->ufid_len = sizeof(struct ufid); 1426 ufhp->ufid_ino = ip->i_number; 1427 ufhp->ufid_gen = ip->i_gen; 1428 return (0); 1429} 1430 1431/* 1432 * Initialize the filesystem. 1433 */ 1434static int 1435ffs_init(vfsp) 1436 struct vfsconf *vfsp; 1437{ 1438 1439 softdep_initialize(); 1440 return (ufs_init(vfsp)); 1441} 1442 1443/* 1444 * Undo the work of ffs_init(). 1445 */ 1446static int 1447ffs_uninit(vfsp) 1448 struct vfsconf *vfsp; 1449{ 1450 int ret; 1451 1452 ret = ufs_uninit(vfsp); 1453 softdep_uninitialize(); 1454 return (ret); 1455} 1456 1457/* 1458 * Write a superblock and associated information back to disk. 1459 */ 1460static int 1461ffs_sbupdate(mp, waitfor) 1462 struct ufsmount *mp; 1463 int waitfor; 1464{ 1465 struct fs *fs = mp->um_fs; 1466 struct buf *bp; 1467 int blks; 1468 void *space; 1469 int i, size, error, allerror = 0; 1470 1471 if (fs->fs_ronly == 1 && 1472 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1473 (MNT_RDONLY | MNT_UPDATE)) 1474 panic("ffs_sbupdate: write read-only filesystem"); 1475 /* 1476 * First write back the summary information. 1477 */ 1478 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1479 space = fs->fs_csp; 1480 for (i = 0; i < blks; i += fs->fs_frag) { 1481 size = fs->fs_bsize; 1482 if (i + fs->fs_frag > blks) 1483 size = (blks - i) * fs->fs_fsize; 1484 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1485 size, 0, 0, 0); 1486 bcopy(space, bp->b_data, (u_int)size); 1487 space = (char *)space + size; 1488 if (waitfor != MNT_WAIT) 1489 bawrite(bp); 1490 else if ((error = bwrite(bp)) != 0) 1491 allerror = error; 1492 } 1493 /* 1494 * Now write back the superblock itself. If any errors occurred 1495 * up to this point, then fail so that the superblock avoids 1496 * being written out as clean. 1497 */ 1498 if (allerror) 1499 return (allerror); 1500 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1501 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1502 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1503 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1504 fs->fs_sblockloc = SBLOCK_UFS1; 1505 } 1506 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1507 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1508 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1509 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1510 fs->fs_sblockloc = SBLOCK_UFS2; 1511 } 1512 bp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1513 0, 0, 0); 1514 fs->fs_fmod = 0; 1515 fs->fs_time = time_second; 1516 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1517 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1518 if (waitfor != MNT_WAIT) 1519 bawrite(bp); 1520 else if ((error = bwrite(bp)) != 0) 1521 allerror = error; 1522 return (allerror); 1523} 1524 1525static int 1526ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1527 int attrnamespace, const char *attrname, struct thread *td) 1528{ 1529 1530#ifdef UFS_EXTATTR 1531 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1532 attrname, td)); 1533#else 1534 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1535 attrname, td)); 1536#endif 1537} 1538 1539static void 1540ffs_ifree(struct ufsmount *ump, struct inode *ip) 1541{ 1542 1543 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1544 uma_zfree(uma_ufs1, ip->i_din1); 1545 else if (ip->i_din2 != NULL) 1546 uma_zfree(uma_ufs2, ip->i_din2); 1547 uma_zfree(uma_inode, ip); 1548} 1549