1 /*- 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_mac.h" 36 #include "opt_quota.h" 37 #include "opt_ufs.h" 38 #include "opt_ffs.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/proc.h> 44 #include <sys/kernel.h> 45 #include <sys/mac.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/conf.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/mutex.h> 54 55 #include <ufs/ufs/extattr.h> 56 #include <ufs/ufs/quota.h> 57 #include <ufs/ufs/ufsmount.h> 58 #include <ufs/ufs/inode.h> 59 #include <ufs/ufs/ufs_extern.h> 60 61 #include <ufs/ffs/fs.h> 62 #include <ufs/ffs/ffs_extern.h> 63 64 #include <vm/vm.h> 65 #include <vm/uma.h> 66 #include <vm/vm_page.h> 67 68 #include <geom/geom.h> 69 #include <geom/geom_vfs.h> 70 71 uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 72 73 static int ffs_sbupdate(struct ufsmount *, int); 74 static int ffs_reload(struct mount *, 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 static vfs_cmount_t ffs_cmount; 84 static vfs_mount_t ffs_mount; 85 86 static struct vfsops ufs_vfsops = { 87 .vfs_extattrctl = ffs_extattrctl, 88 .vfs_fhtovp = ffs_fhtovp, 89 .vfs_init = ffs_init, 90 .vfs_mount = ffs_mount, 91 .vfs_cmount = ffs_cmount, 92 .vfs_quotactl = ufs_quotactl, 93 .vfs_root = ufs_root, 94 .vfs_statfs = ffs_statfs, 95 .vfs_sync = ffs_sync, 96 .vfs_uninit = ffs_uninit, 97 .vfs_unmount = ffs_unmount, 98 .vfs_vget = ffs_vget, 99 .vfs_vptofh = ffs_vptofh, 100 }; 101 102 VFS_SET(ufs_vfsops, ufs, 0); 103 104 static b_strategy_t ffs_geom_strategy; 105 static b_write_t ffs_bufwrite; 106 107 static struct buf_ops ffs_ops = { 108 .bop_name = "FFS", 109 .bop_write = ffs_bufwrite, 110 .bop_strategy = ffs_geom_strategy, 111 .bop_sync = bufsync, 112 }; 113 114 static const char *ffs_opts[] = { "from", "export", NULL }; 115 116 static int 117 ffs_mount(struct mount *mp, struct thread *td) 118 { 119 struct vnode *devvp; 120 struct ufsmount *ump = 0; 121 struct fs *fs; 122 int error, flags; 123 mode_t accessmode; 124 struct nameidata ndp; 125 struct export_args export; 126 char *fspec; 127 128 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 129 return (EINVAL); 130 if (uma_inode == NULL) { 131 uma_inode = uma_zcreate("FFS inode", 132 sizeof(struct inode), NULL, NULL, NULL, NULL, 133 UMA_ALIGN_PTR, 0); 134 uma_ufs1 = uma_zcreate("FFS1 dinode", 135 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 136 UMA_ALIGN_PTR, 0); 137 uma_ufs2 = uma_zcreate("FFS2 dinode", 138 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 139 UMA_ALIGN_PTR, 0); 140 } 141 142 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 143 if (error) 144 return (error); 145 146 /* 147 * If updating, check whether changing from read-only to 148 * read/write; if there is no device name, that's all we do. 149 */ 150 if (mp->mnt_flag & MNT_UPDATE) { 151 ump = VFSTOUFS(mp); 152 fs = ump->um_fs; 153 devvp = ump->um_devvp; 154 if (fs->fs_ronly == 0 && 155 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 156 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 157 return (error); 158 /* 159 * Flush any dirty data. 160 */ 161 if ((error = ffs_sync(mp, MNT_WAIT, td)) != 0) { 162 vn_finished_write(mp); 163 return (error); 164 } 165 /* 166 * Check for and optionally get rid of files open 167 * for writing. 168 */ 169 flags = WRITECLOSE; 170 if (mp->mnt_flag & MNT_FORCE) 171 flags |= FORCECLOSE; 172 if (mp->mnt_flag & MNT_SOFTDEP) { 173 error = softdep_flushfiles(mp, flags, td); 174 } else { 175 error = ffs_flushfiles(mp, flags, td); 176 } 177 if (error) { 178 vn_finished_write(mp); 179 return (error); 180 } 181 if (fs->fs_pendingblocks != 0 || 182 fs->fs_pendinginodes != 0) { 183 printf("%s: %s: blocks %jd files %d\n", 184 fs->fs_fsmnt, "update error", 185 (intmax_t)fs->fs_pendingblocks, 186 fs->fs_pendinginodes); 187 fs->fs_pendingblocks = 0; 188 fs->fs_pendinginodes = 0; 189 } 190 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 191 fs->fs_clean = 1; 192 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 193 fs->fs_ronly = 0; 194 fs->fs_clean = 0; 195 vn_finished_write(mp); 196 return (error); 197 } 198 vn_finished_write(mp); 199 DROP_GIANT(); 200 g_topology_lock(); 201 g_access(ump->um_cp, 0, -1, 0); 202 g_topology_unlock(); 203 PICKUP_GIANT(); 204 fs->fs_ronly = 1; 205 mp->mnt_flag |= MNT_RDONLY; 206 } 207 if ((mp->mnt_flag & MNT_RELOAD) && 208 (error = ffs_reload(mp, td)) != 0) 209 return (error); 210 if (fs->fs_ronly && 211 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 212 /* 213 * If upgrade to read-write by non-root, then verify 214 * that user has necessary permissions on the device. 215 */ 216 if (suser(td)) { 217 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 218 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 219 td->td_ucred, td)) != 0) { 220 VOP_UNLOCK(devvp, 0, td); 221 return (error); 222 } 223 VOP_UNLOCK(devvp, 0, td); 224 } 225 fs->fs_flags &= ~FS_UNCLEAN; 226 if (fs->fs_clean == 0) { 227 fs->fs_flags |= FS_UNCLEAN; 228 if ((mp->mnt_flag & MNT_FORCE) || 229 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 230 (fs->fs_flags & FS_DOSOFTDEP))) { 231 printf("WARNING: %s was not %s\n", 232 fs->fs_fsmnt, "properly dismounted"); 233 } else { 234 printf( 235 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 236 fs->fs_fsmnt); 237 return (EPERM); 238 } 239 } 240 DROP_GIANT(); 241 g_topology_lock(); 242 /* 243 * If we're the root device, we may not have an E count 244 * yet, get it now. 245 */ 246 if (ump->um_cp->ace == 0) 247 error = g_access(ump->um_cp, 0, 1, 1); 248 else 249 error = g_access(ump->um_cp, 0, 1, 0); 250 g_topology_unlock(); 251 PICKUP_GIANT(); 252 if (error) 253 return (error); 254 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 255 return (error); 256 fs->fs_ronly = 0; 257 mp->mnt_flag &= ~MNT_RDONLY; 258 fs->fs_clean = 0; 259 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 260 vn_finished_write(mp); 261 return (error); 262 } 263 /* check to see if we need to start softdep */ 264 if ((fs->fs_flags & FS_DOSOFTDEP) && 265 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 266 vn_finished_write(mp); 267 return (error); 268 } 269 if (fs->fs_snapinum[0] != 0) 270 ffs_snapshot_mount(mp); 271 vn_finished_write(mp); 272 } 273 /* 274 * Soft updates is incompatible with "async", 275 * so if we are doing softupdates stop the user 276 * from setting the async flag in an update. 277 * Softdep_mount() clears it in an initial mount 278 * or ro->rw remount. 279 */ 280 if (mp->mnt_flag & MNT_SOFTDEP) 281 mp->mnt_flag &= ~MNT_ASYNC; 282 /* 283 * Keep MNT_ACLS flag if it is stored in superblock. 284 */ 285 if ((fs->fs_flags & FS_ACLS) != 0) 286 mp->mnt_flag |= MNT_ACLS; 287 /* 288 * If not updating name, process export requests. 289 */ 290 error = vfs_copyopt(mp->mnt_optnew, "export", &export, sizeof export); 291 if (error == 0 && export.ex_flags != 0) 292 return (vfs_export(mp, &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, fspec)); 298 } 299 300 /* 301 * Not an update, or updating the name: look up the name 302 * and verify that it refers to a sensible disk device. 303 */ 304 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 305 if ((error = namei(&ndp)) != 0) 306 return (error); 307 NDFREE(&ndp, NDF_ONLY_PNBUF); 308 devvp = ndp.ni_vp; 309 if (!vn_isdisk(devvp, &error)) { 310 vrele(devvp); 311 return (error); 312 } 313 314 /* 315 * If mount by non-root, then verify that user has necessary 316 * permissions on the device. 317 */ 318 if (suser(td)) { 319 accessmode = VREAD; 320 if ((mp->mnt_flag & MNT_RDONLY) == 0) 321 accessmode |= VWRITE; 322 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 323 if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){ 324 vput(devvp); 325 return (error); 326 } 327 VOP_UNLOCK(devvp, 0, td); 328 } 329 330 if (mp->mnt_flag & MNT_UPDATE) { 331 /* 332 * Update only 333 * 334 * If it's not the same vnode, or at least the same device 335 * then it's not correct. 336 */ 337 338 if (devvp->v_rdev != ump->um_devvp->v_rdev) 339 error = EINVAL; /* needs translation */ 340 vrele(devvp); 341 if (error) 342 return (error); 343 } else { 344 /* 345 * New mount 346 * 347 * We need the name for the mount point (also used for 348 * "last mounted on") copied in. If an error occurs, 349 * the mount point is discarded by the upper level code. 350 * Note that vfs_mount() populates f_mntonname for us. 351 */ 352 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 353 vrele(devvp); 354 return (error); 355 } 356 } 357 vfs_mountedfrom(mp, fspec); 358 return (0); 359 } 360 361 /* 362 * Compatibility with old mount system call. 363 */ 364 365 static int 366 ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 367 { 368 struct ufs_args args; 369 int error; 370 371 if (data == NULL) 372 return (EINVAL); 373 error = copyin(data, &args, sizeof args); 374 if (error) 375 return (error); 376 377 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 378 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 379 error = kernel_mount(ma, flags); 380 381 return (error); 382 } 383 384 /* 385 * Reload all incore data for a filesystem (used after running fsck on 386 * the root filesystem and finding things to fix). The filesystem must 387 * be mounted read-only. 388 * 389 * Things to do to update the mount: 390 * 1) invalidate all cached meta-data. 391 * 2) re-read superblock from disk. 392 * 3) re-read summary information from disk. 393 * 4) invalidate all inactive vnodes. 394 * 5) invalidate all cached file data. 395 * 6) re-read inode data for all active vnodes. 396 */ 397 static int 398 ffs_reload(struct mount *mp, struct thread *td) 399 { 400 struct vnode *vp, *nvp, *devvp; 401 struct inode *ip; 402 void *space; 403 struct buf *bp; 404 struct fs *fs, *newfs; 405 struct ufsmount *ump; 406 ufs2_daddr_t sblockloc; 407 int i, blks, size, error; 408 int32_t *lp; 409 410 if ((mp->mnt_flag & MNT_RDONLY) == 0) 411 return (EINVAL); 412 ump = VFSTOUFS(mp); 413 /* 414 * Step 1: invalidate all cached meta-data. 415 */ 416 devvp = VFSTOUFS(mp)->um_devvp; 417 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 418 if (vinvalbuf(devvp, 0, td, 0, 0) != 0) 419 panic("ffs_reload: dirty1"); 420 VOP_UNLOCK(devvp, 0, td); 421 422 /* 423 * Step 2: re-read superblock from disk. 424 */ 425 fs = VFSTOUFS(mp)->um_fs; 426 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 427 NOCRED, &bp)) != 0) 428 return (error); 429 newfs = (struct fs *)bp->b_data; 430 if ((newfs->fs_magic != FS_UFS1_MAGIC && 431 newfs->fs_magic != FS_UFS2_MAGIC) || 432 newfs->fs_bsize > MAXBSIZE || 433 newfs->fs_bsize < sizeof(struct fs)) { 434 brelse(bp); 435 return (EIO); /* XXX needs translation */ 436 } 437 /* 438 * Copy pointer fields back into superblock before copying in XXX 439 * new superblock. These should really be in the ufsmount. XXX 440 * Note that important parameters (eg fs_ncg) are unchanged. 441 */ 442 newfs->fs_csp = fs->fs_csp; 443 newfs->fs_maxcluster = fs->fs_maxcluster; 444 newfs->fs_contigdirs = fs->fs_contigdirs; 445 newfs->fs_active = fs->fs_active; 446 /* The file system is still read-only. */ 447 newfs->fs_ronly = 1; 448 sblockloc = fs->fs_sblockloc; 449 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 450 brelse(bp); 451 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 452 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 453 UFS_LOCK(ump); 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 UFS_UNLOCK(ump); 462 463 /* 464 * Step 3: re-read summary information from disk. 465 */ 466 blks = howmany(fs->fs_cssize, fs->fs_fsize); 467 space = fs->fs_csp; 468 for (i = 0; i < blks; i += fs->fs_frag) { 469 size = fs->fs_bsize; 470 if (i + fs->fs_frag > blks) 471 size = (blks - i) * fs->fs_fsize; 472 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 473 NOCRED, &bp); 474 if (error) 475 return (error); 476 bcopy(bp->b_data, space, (u_int)size); 477 space = (char *)space + size; 478 brelse(bp); 479 } 480 /* 481 * We no longer know anything about clusters per cylinder group. 482 */ 483 if (fs->fs_contigsumsize > 0) { 484 lp = fs->fs_maxcluster; 485 for (i = 0; i < fs->fs_ncg; i++) 486 *lp++ = fs->fs_contigsumsize; 487 } 488 489 loop: 490 MNT_ILOCK(mp); 491 MNT_VNODE_FOREACH(vp, mp, nvp) { 492 VI_LOCK(vp); 493 if (vp->v_iflag & VI_XLOCK) { 494 VI_UNLOCK(vp); 495 continue; 496 } 497 MNT_IUNLOCK(mp); 498 /* 499 * Step 4: invalidate all inactive vnodes. 500 */ 501 if (vp->v_usecount == 0) { 502 vgonel(vp, td); 503 goto loop; 504 } 505 /* 506 * Step 5: invalidate all cached file data. 507 */ 508 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 509 goto loop; 510 } 511 if (vinvalbuf(vp, 0, td, 0, 0)) 512 panic("ffs_reload: dirty2"); 513 /* 514 * Step 6: re-read inode data for all active vnodes. 515 */ 516 ip = VTOI(vp); 517 error = 518 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 519 (int)fs->fs_bsize, NOCRED, &bp); 520 if (error) { 521 VOP_UNLOCK(vp, 0, td); 522 vrele(vp); 523 return (error); 524 } 525 ffs_load_inode(bp, ip, fs, ip->i_number); 526 ip->i_effnlink = ip->i_nlink; 527 brelse(bp); 528 VOP_UNLOCK(vp, 0, td); 529 vrele(vp); 530 MNT_ILOCK(mp); 531 } 532 MNT_IUNLOCK(mp); 533 return (0); 534 } 535 536 /* 537 * Possible superblock locations ordered from most to least likely. 538 */ 539 static int sblock_try[] = SBLOCKSEARCH; 540 541 /* 542 * Common code for mount and mountroot 543 */ 544 static int 545 ffs_mountfs(devvp, mp, td) 546 struct vnode *devvp; 547 struct mount *mp; 548 struct thread *td; 549 { 550 struct ufsmount *ump; 551 struct buf *bp; 552 struct fs *fs; 553 struct cdev *dev; 554 void *space; 555 ufs2_daddr_t sblockloc; 556 int error, i, blks, size, ronly; 557 int32_t *lp; 558 struct ucred *cred; 559 struct g_consumer *cp; 560 561 dev = devvp->v_rdev; 562 cred = td ? td->td_ucred : NOCRED; 563 564 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 565 DROP_GIANT(); 566 g_topology_lock(); 567 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 568 569 /* 570 * If we are a root mount, drop the E flag so fsck can do its magic. 571 * We will pick it up again when we remount R/W. 572 */ 573 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 574 error = g_access(cp, 0, 0, -1); 575 g_topology_unlock(); 576 PICKUP_GIANT(); 577 VOP_UNLOCK(devvp, 0, td); 578 if (error) 579 return (error); 580 if (devvp->v_rdev->si_iosize_max != 0) 581 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 582 if (mp->mnt_iosize_max > MAXPHYS) 583 mp->mnt_iosize_max = MAXPHYS; 584 585 devvp->v_bufobj.bo_private = cp; 586 devvp->v_bufobj.bo_ops = &ffs_ops; 587 588 bp = NULL; 589 ump = NULL; 590 fs = NULL; 591 sblockloc = 0; 592 /* 593 * Try reading the superblock in each of its possible locations. 594 */ 595 for (i = 0; sblock_try[i] != -1; i++) { 596 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 597 cred, &bp)) != 0) 598 goto out; 599 fs = (struct fs *)bp->b_data; 600 sblockloc = sblock_try[i]; 601 if ((fs->fs_magic == FS_UFS1_MAGIC || 602 (fs->fs_magic == FS_UFS2_MAGIC && 603 (fs->fs_sblockloc == sblockloc || 604 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 605 fs->fs_bsize <= MAXBSIZE && 606 fs->fs_bsize >= sizeof(struct fs)) 607 break; 608 brelse(bp); 609 bp = NULL; 610 } 611 if (sblock_try[i] == -1) { 612 error = EINVAL; /* XXX needs translation */ 613 goto out; 614 } 615 fs->fs_fmod = 0; 616 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 617 fs->fs_flags &= ~FS_UNCLEAN; 618 if (fs->fs_clean == 0) { 619 fs->fs_flags |= FS_UNCLEAN; 620 if (ronly || (mp->mnt_flag & MNT_FORCE) || 621 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 622 (fs->fs_flags & FS_DOSOFTDEP))) { 623 printf( 624 "WARNING: %s was not properly dismounted\n", 625 fs->fs_fsmnt); 626 } else { 627 printf( 628 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 629 fs->fs_fsmnt); 630 error = EPERM; 631 goto out; 632 } 633 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 634 (mp->mnt_flag & MNT_FORCE)) { 635 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 636 (intmax_t)fs->fs_pendingblocks, 637 fs->fs_pendinginodes); 638 fs->fs_pendingblocks = 0; 639 fs->fs_pendinginodes = 0; 640 } 641 } 642 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 643 printf("%s: mount pending error: blocks %jd files %d\n", 644 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 645 fs->fs_pendinginodes); 646 fs->fs_pendingblocks = 0; 647 fs->fs_pendinginodes = 0; 648 } 649 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 650 ump->um_cp = cp; 651 ump->um_bo = &devvp->v_bufobj; 652 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 653 if (fs->fs_magic == FS_UFS1_MAGIC) { 654 ump->um_fstype = UFS1; 655 ump->um_balloc = ffs_balloc_ufs1; 656 } else { 657 ump->um_fstype = UFS2; 658 ump->um_balloc = ffs_balloc_ufs2; 659 } 660 ump->um_blkatoff = ffs_blkatoff; 661 ump->um_truncate = ffs_truncate; 662 ump->um_update = ffs_update; 663 ump->um_valloc = ffs_valloc; 664 ump->um_vfree = ffs_vfree; 665 ump->um_ifree = ffs_ifree; 666 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 667 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 668 if (fs->fs_sbsize < SBLOCKSIZE) 669 bp->b_flags |= B_INVAL | B_NOCACHE; 670 brelse(bp); 671 bp = NULL; 672 fs = ump->um_fs; 673 ffs_oldfscompat_read(fs, ump, sblockloc); 674 fs->fs_ronly = ronly; 675 size = fs->fs_cssize; 676 blks = howmany(size, fs->fs_fsize); 677 if (fs->fs_contigsumsize > 0) 678 size += fs->fs_ncg * sizeof(int32_t); 679 size += fs->fs_ncg * sizeof(u_int8_t); 680 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 681 fs->fs_csp = space; 682 for (i = 0; i < blks; i += fs->fs_frag) { 683 size = fs->fs_bsize; 684 if (i + fs->fs_frag > blks) 685 size = (blks - i) * fs->fs_fsize; 686 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 687 cred, &bp)) != 0) { 688 free(fs->fs_csp, M_UFSMNT); 689 goto out; 690 } 691 bcopy(bp->b_data, space, (u_int)size); 692 space = (char *)space + size; 693 brelse(bp); 694 bp = NULL; 695 } 696 if (fs->fs_contigsumsize > 0) { 697 fs->fs_maxcluster = lp = space; 698 for (i = 0; i < fs->fs_ncg; i++) 699 *lp++ = fs->fs_contigsumsize; 700 space = lp; 701 } 702 size = fs->fs_ncg * sizeof(u_int8_t); 703 fs->fs_contigdirs = (u_int8_t *)space; 704 bzero(fs->fs_contigdirs, size); 705 fs->fs_active = NULL; 706 mp->mnt_data = (qaddr_t)ump; 707 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 708 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 709 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 710 vfs_getvfs(&mp->mnt_stat.f_fsid)) 711 vfs_getnewfsid(mp); 712 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 713 mp->mnt_flag |= MNT_LOCAL; 714 if ((fs->fs_flags & FS_MULTILABEL) != 0) 715 #ifdef MAC 716 mp->mnt_flag |= MNT_MULTILABEL; 717 #else 718 printf( 719 "WARNING: %s: multilabel flag on fs but no MAC support\n", 720 fs->fs_fsmnt); 721 #endif 722 if ((fs->fs_flags & FS_ACLS) != 0) 723 #ifdef UFS_ACL 724 mp->mnt_flag |= MNT_ACLS; 725 #else 726 printf( 727 "WARNING: %s: ACLs flag on fs but no ACLs support\n", 728 fs->fs_fsmnt); 729 #endif 730 ump->um_mountp = mp; 731 ump->um_dev = dev; 732 ump->um_devvp = devvp; 733 ump->um_nindir = fs->fs_nindir; 734 ump->um_bptrtodb = fs->fs_fsbtodb; 735 ump->um_seqinc = fs->fs_frag; 736 for (i = 0; i < MAXQUOTAS; i++) 737 ump->um_quotas[i] = NULLVP; 738 #ifdef UFS_EXTATTR 739 ufs_extattr_uepm_init(&ump->um_extattr); 740 #endif 741 /* 742 * Set FS local "last mounted on" information (NULL pad) 743 */ 744 vfs_mountedfrom(mp, fs->fs_fsmnt); 745 746 if( mp->mnt_flag & MNT_ROOTFS) { 747 /* 748 * Root mount; update timestamp in mount structure. 749 * this will be used by the common root mount code 750 * to update the system clock. 751 */ 752 mp->mnt_time = fs->fs_time; 753 } 754 755 if (ronly == 0) { 756 if ((fs->fs_flags & FS_DOSOFTDEP) && 757 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 758 free(fs->fs_csp, M_UFSMNT); 759 goto out; 760 } 761 if (fs->fs_snapinum[0] != 0) 762 ffs_snapshot_mount(mp); 763 fs->fs_fmod = 1; 764 fs->fs_clean = 0; 765 (void) ffs_sbupdate(ump, MNT_WAIT); 766 } 767 /* 768 * Initialize filesystem stat information in mount struct. 769 */ 770 #ifdef UFS_EXTATTR 771 #ifdef UFS_EXTATTR_AUTOSTART 772 /* 773 * 774 * Auto-starting does the following: 775 * - check for /.attribute in the fs, and extattr_start if so 776 * - for each file in .attribute, enable that file with 777 * an attribute of the same name. 778 * Not clear how to report errors -- probably eat them. 779 * This would all happen while the filesystem was busy/not 780 * available, so would effectively be "atomic". 781 */ 782 (void) ufs_extattr_autostart(mp, td); 783 #endif /* !UFS_EXTATTR_AUTOSTART */ 784 #endif /* !UFS_EXTATTR */ 785 #ifndef QUOTA 786 mp->mnt_kern_flag |= MNTK_MPSAFE; 787 #endif 788 return (0); 789 out: 790 if (bp) 791 brelse(bp); 792 vinvalbuf(devvp, V_SAVE, td, 0, 0); 793 if (cp != NULL) { 794 DROP_GIANT(); 795 g_topology_lock(); 796 g_vfs_close(cp, td); 797 g_topology_unlock(); 798 PICKUP_GIANT(); 799 } 800 if (ump) { 801 mtx_destroy(UFS_MTX(ump)); 802 free(ump->um_fs, M_UFSMNT); 803 free(ump, M_UFSMNT); 804 mp->mnt_data = (qaddr_t)0; 805 } 806 return (error); 807 } 808 809 #include <sys/sysctl.h> 810 int bigcgs = 0; 811 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 812 813 /* 814 * Sanity checks for loading old filesystem superblocks. 815 * See ffs_oldfscompat_write below for unwound actions. 816 * 817 * XXX - Parts get retired eventually. 818 * Unfortunately new bits get added. 819 */ 820 static void 821 ffs_oldfscompat_read(fs, ump, sblockloc) 822 struct fs *fs; 823 struct ufsmount *ump; 824 ufs2_daddr_t sblockloc; 825 { 826 off_t maxfilesize; 827 828 /* 829 * If not yet done, update fs_flags location and value of fs_sblockloc. 830 */ 831 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 832 fs->fs_flags = fs->fs_old_flags; 833 fs->fs_old_flags |= FS_FLAGS_UPDATED; 834 fs->fs_sblockloc = sblockloc; 835 } 836 /* 837 * If not yet done, update UFS1 superblock with new wider fields. 838 */ 839 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 840 fs->fs_maxbsize = fs->fs_bsize; 841 fs->fs_time = fs->fs_old_time; 842 fs->fs_size = fs->fs_old_size; 843 fs->fs_dsize = fs->fs_old_dsize; 844 fs->fs_csaddr = fs->fs_old_csaddr; 845 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 846 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 847 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 848 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 849 } 850 if (fs->fs_magic == FS_UFS1_MAGIC && 851 fs->fs_old_inodefmt < FS_44INODEFMT) { 852 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 853 fs->fs_qbmask = ~fs->fs_bmask; 854 fs->fs_qfmask = ~fs->fs_fmask; 855 } 856 if (fs->fs_magic == FS_UFS1_MAGIC) { 857 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 858 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 859 if (fs->fs_maxfilesize > maxfilesize) 860 fs->fs_maxfilesize = maxfilesize; 861 } 862 /* Compatibility for old filesystems */ 863 if (fs->fs_avgfilesize <= 0) 864 fs->fs_avgfilesize = AVFILESIZ; 865 if (fs->fs_avgfpdir <= 0) 866 fs->fs_avgfpdir = AFPDIR; 867 if (bigcgs) { 868 fs->fs_save_cgsize = fs->fs_cgsize; 869 fs->fs_cgsize = fs->fs_bsize; 870 } 871 } 872 873 /* 874 * Unwinding superblock updates for old filesystems. 875 * See ffs_oldfscompat_read above for details. 876 * 877 * XXX - Parts get retired eventually. 878 * Unfortunately new bits get added. 879 */ 880 static void 881 ffs_oldfscompat_write(fs, ump) 882 struct fs *fs; 883 struct ufsmount *ump; 884 { 885 886 /* 887 * Copy back UFS2 updated fields that UFS1 inspects. 888 */ 889 if (fs->fs_magic == FS_UFS1_MAGIC) { 890 fs->fs_old_time = fs->fs_time; 891 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 892 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 893 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 894 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 895 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 896 } 897 if (bigcgs) { 898 fs->fs_cgsize = fs->fs_save_cgsize; 899 fs->fs_save_cgsize = 0; 900 } 901 } 902 903 /* 904 * unmount system call 905 */ 906 int 907 ffs_unmount(mp, mntflags, td) 908 struct mount *mp; 909 int mntflags; 910 struct thread *td; 911 { 912 struct ufsmount *ump = VFSTOUFS(mp); 913 struct fs *fs; 914 int error, flags; 915 916 flags = 0; 917 if (mntflags & MNT_FORCE) { 918 flags |= FORCECLOSE; 919 } 920 #ifdef UFS_EXTATTR 921 if ((error = ufs_extattr_stop(mp, td))) { 922 if (error != EOPNOTSUPP) 923 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 924 error); 925 } else { 926 ufs_extattr_uepm_destroy(&ump->um_extattr); 927 } 928 #endif 929 if (mp->mnt_flag & MNT_SOFTDEP) { 930 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 931 return (error); 932 } else { 933 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 934 return (error); 935 } 936 fs = ump->um_fs; 937 UFS_LOCK(ump); 938 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 939 printf("%s: unmount pending error: blocks %jd files %d\n", 940 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 941 fs->fs_pendinginodes); 942 fs->fs_pendingblocks = 0; 943 fs->fs_pendinginodes = 0; 944 } 945 UFS_UNLOCK(ump); 946 if (fs->fs_ronly == 0) { 947 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 948 error = ffs_sbupdate(ump, MNT_WAIT); 949 if (error) { 950 fs->fs_clean = 0; 951 return (error); 952 } 953 } 954 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0); 955 DROP_GIANT(); 956 g_topology_lock(); 957 g_vfs_close(ump->um_cp, td); 958 g_topology_unlock(); 959 PICKUP_GIANT(); 960 vrele(ump->um_devvp); 961 mtx_destroy(UFS_MTX(ump)); 962 free(fs->fs_csp, M_UFSMNT); 963 free(fs, M_UFSMNT); 964 free(ump, M_UFSMNT); 965 mp->mnt_data = (qaddr_t)0; 966 mp->mnt_flag &= ~MNT_LOCAL; 967 return (error); 968 } 969 970 /* 971 * Flush out all the files in a filesystem. 972 */ 973 int 974 ffs_flushfiles(mp, flags, td) 975 struct mount *mp; 976 int flags; 977 struct thread *td; 978 { 979 struct ufsmount *ump; 980 int error; 981 982 ump = VFSTOUFS(mp); 983 #ifdef QUOTA 984 if (mp->mnt_flag & MNT_QUOTA) { 985 int i; 986 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 987 if (error) 988 return (error); 989 for (i = 0; i < MAXQUOTAS; i++) { 990 if (ump->um_quotas[i] == NULLVP) 991 continue; 992 quotaoff(td, mp, i); 993 } 994 /* 995 * Here we fall through to vflush again to ensure 996 * that we have gotten rid of all the system vnodes. 997 */ 998 } 999 #endif 1000 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1001 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1002 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1003 return (error); 1004 ffs_snapshot_unmount(mp); 1005 /* 1006 * Here we fall through to vflush again to ensure 1007 * that we have gotten rid of all the system vnodes. 1008 */ 1009 } 1010 /* 1011 * Flush all the files. 1012 */ 1013 if ((error = vflush(mp, 0, flags, td)) != 0) 1014 return (error); 1015 /* 1016 * Flush filesystem metadata. 1017 */ 1018 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1019 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1020 VOP_UNLOCK(ump->um_devvp, 0, td); 1021 return (error); 1022 } 1023 1024 /* 1025 * Get filesystem statistics. 1026 */ 1027 int 1028 ffs_statfs(mp, sbp, td) 1029 struct mount *mp; 1030 struct statfs *sbp; 1031 struct thread *td; 1032 { 1033 struct ufsmount *ump; 1034 struct fs *fs; 1035 1036 ump = VFSTOUFS(mp); 1037 fs = ump->um_fs; 1038 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1039 panic("ffs_statfs"); 1040 sbp->f_version = STATFS_VERSION; 1041 sbp->f_bsize = fs->fs_fsize; 1042 sbp->f_iosize = fs->fs_bsize; 1043 sbp->f_blocks = fs->fs_dsize; 1044 UFS_LOCK(ump); 1045 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1046 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1047 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1048 dbtofsb(fs, fs->fs_pendingblocks); 1049 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1050 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1051 UFS_UNLOCK(ump); 1052 sbp->f_namemax = NAME_MAX; 1053 return (0); 1054 } 1055 1056 /* 1057 * Go through the disk queues to initiate sandbagged IO; 1058 * go through the inodes to write those that have been modified; 1059 * initiate the writing of the super block if it has been modified. 1060 * 1061 * Note: we are always called with the filesystem marked `MPBUSY'. 1062 */ 1063 int 1064 ffs_sync(mp, waitfor, td) 1065 struct mount *mp; 1066 int waitfor; 1067 struct thread *td; 1068 { 1069 struct vnode *nvp, *vp, *devvp; 1070 struct inode *ip; 1071 struct ufsmount *ump = VFSTOUFS(mp); 1072 struct fs *fs; 1073 int error, count, wait, lockreq, allerror = 0; 1074 struct bufobj *bo; 1075 1076 fs = ump->um_fs; 1077 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1078 printf("fs = %s\n", fs->fs_fsmnt); 1079 panic("ffs_sync: rofs mod"); 1080 } 1081 /* 1082 * Write back each (modified) inode. 1083 */ 1084 wait = 0; 1085 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1086 if (waitfor == MNT_WAIT) { 1087 wait = 1; 1088 lockreq = LK_EXCLUSIVE; 1089 } 1090 lockreq |= LK_INTERLOCK; 1091 MNT_ILOCK(mp); 1092 loop: 1093 MNT_VNODE_FOREACH(vp, mp, nvp) { 1094 /* 1095 * Depend on the mntvnode_slock to keep things stable enough 1096 * for a quick test. Since there might be hundreds of 1097 * thousands of vnodes, we cannot afford even a subroutine 1098 * call unless there's a good chance that we have work to do. 1099 */ 1100 VI_LOCK(vp); 1101 if (vp->v_iflag & VI_XLOCK) { 1102 VI_UNLOCK(vp); 1103 continue; 1104 } 1105 ip = VTOI(vp); 1106 if (vp->v_type == VNON || ((ip->i_flag & 1107 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1108 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1109 VI_UNLOCK(vp); 1110 continue; 1111 } 1112 MNT_IUNLOCK(mp); 1113 if ((error = vget(vp, lockreq, td)) != 0) { 1114 MNT_ILOCK(mp); 1115 if (error == ENOENT) 1116 goto loop; 1117 continue; 1118 } 1119 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1120 allerror = error; 1121 VOP_UNLOCK(vp, 0, td); 1122 vrele(vp); 1123 MNT_ILOCK(mp); 1124 } 1125 MNT_IUNLOCK(mp); 1126 /* 1127 * Force stale filesystem control information to be flushed. 1128 */ 1129 if (waitfor == MNT_WAIT) { 1130 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1131 allerror = error; 1132 /* Flushed work items may create new vnodes to clean */ 1133 if (allerror == 0 && count) { 1134 MNT_ILOCK(mp); 1135 goto loop; 1136 } 1137 } 1138 #ifdef QUOTA 1139 qsync(mp); 1140 #endif 1141 devvp = ump->um_devvp; 1142 VI_LOCK(devvp); 1143 bo = &devvp->v_bufobj; 1144 if (waitfor != MNT_LAZY && 1145 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1146 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1147 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1148 allerror = error; 1149 VOP_UNLOCK(devvp, 0, td); 1150 if (allerror == 0 && waitfor == MNT_WAIT) { 1151 MNT_ILOCK(mp); 1152 goto loop; 1153 } 1154 } else 1155 VI_UNLOCK(devvp); 1156 /* 1157 * Write back modified superblock. 1158 */ 1159 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1160 allerror = error; 1161 return (allerror); 1162 } 1163 1164 int 1165 ffs_vget(mp, ino, flags, vpp) 1166 struct mount *mp; 1167 ino_t ino; 1168 int flags; 1169 struct vnode **vpp; 1170 { 1171 struct thread *td = curthread; /* XXX */ 1172 struct fs *fs; 1173 struct inode *ip; 1174 struct ufsmount *ump; 1175 struct buf *bp; 1176 struct vnode *vp; 1177 struct cdev *dev; 1178 int error; 1179 1180 ump = VFSTOUFS(mp); 1181 dev = ump->um_dev; 1182 fs = ump->um_fs; 1183 1184 /* 1185 * We do not lock vnode creation as it is believed to be too 1186 * expensive for such rare case as simultaneous creation of vnode 1187 * for same ino by different processes. We just allow them to race 1188 * and check later to decide who wins. Let the race begin! 1189 */ 1190 if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) 1191 return (error); 1192 if (*vpp != NULL) 1193 return (0); 1194 1195 /* 1196 * If this MALLOC() is performed after the getnewvnode() 1197 * it might block, leaving a vnode with a NULL v_data to be 1198 * found by ffs_sync() if a sync happens to fire right then, 1199 * which will cause a panic because ffs_sync() blindly 1200 * dereferences vp->v_data (as well it should). 1201 */ 1202 ip = uma_zalloc(uma_inode, M_WAITOK); 1203 1204 /* Allocate a new vnode/inode. */ 1205 if (fs->fs_magic == FS_UFS1_MAGIC) 1206 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1207 else 1208 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1209 if (error) { 1210 *vpp = NULL; 1211 uma_zfree(uma_inode, ip); 1212 return (error); 1213 } 1214 bzero((caddr_t)ip, sizeof(struct inode)); 1215 /* 1216 * FFS supports recursive locking. 1217 */ 1218 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1219 vp->v_data = ip; 1220 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1221 ip->i_vnode = vp; 1222 ip->i_ump = ump; 1223 ip->i_fs = fs; 1224 ip->i_dev = dev; 1225 ip->i_number = ino; 1226 #ifdef QUOTA 1227 { 1228 int i; 1229 for (i = 0; i < MAXQUOTAS; i++) 1230 ip->i_dquot[i] = NODQUOT; 1231 } 1232 #endif 1233 /* 1234 * Exclusively lock the vnode before adding to hash. Note, that we 1235 * must not release nor downgrade the lock (despite flags argument 1236 * says) till it is fully initialized. 1237 */ 1238 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td); 1239 1240 /* 1241 * Atomicaly (in terms of ufs_hash operations) check the hash for 1242 * duplicate of vnode being created and add it to the hash. If a 1243 * duplicate vnode was found, it will be vget()ed from hash for us. 1244 */ 1245 if ((error = ufs_ihashins(ip, flags, vpp)) != 0) { 1246 vput(vp); 1247 *vpp = NULL; 1248 return (error); 1249 } 1250 1251 /* We lost the race, then throw away our vnode and return existing */ 1252 if (*vpp != NULL) { 1253 vput(vp); 1254 return (0); 1255 } 1256 1257 /* Read in the disk contents for the inode, copy into the inode. */ 1258 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1259 (int)fs->fs_bsize, NOCRED, &bp); 1260 if (error) { 1261 /* 1262 * The inode does not contain anything useful, so it would 1263 * be misleading to leave it on its hash chain. With mode 1264 * still zero, it will be unlinked and returned to the free 1265 * list by vput(). 1266 */ 1267 brelse(bp); 1268 vput(vp); 1269 *vpp = NULL; 1270 return (error); 1271 } 1272 if (ip->i_ump->um_fstype == UFS1) 1273 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1274 else 1275 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1276 ffs_load_inode(bp, ip, fs, ino); 1277 if (DOINGSOFTDEP(vp)) 1278 softdep_load_inodeblock(ip); 1279 else 1280 ip->i_effnlink = ip->i_nlink; 1281 bqrelse(bp); 1282 1283 /* 1284 * Initialize the vnode from the inode, check for aliases. 1285 * Note that the underlying vnode may have changed. 1286 */ 1287 if (ip->i_ump->um_fstype == UFS1) 1288 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1289 else 1290 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1291 if (error) { 1292 vput(vp); 1293 *vpp = NULL; 1294 return (error); 1295 } 1296 /* 1297 * Finish inode initialization. 1298 */ 1299 VREF(ip->i_devvp); 1300 /* 1301 * Set up a generation number for this inode if it does not 1302 * already have one. This should only happen on old filesystems. 1303 */ 1304 if (ip->i_gen == 0) { 1305 ip->i_gen = arc4random() / 2 + 1; 1306 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1307 ip->i_flag |= IN_MODIFIED; 1308 DIP_SET(ip, i_gen, ip->i_gen); 1309 } 1310 } 1311 /* 1312 * Ensure that uid and gid are correct. This is a temporary 1313 * fix until fsck has been changed to do the update. 1314 */ 1315 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1316 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1317 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1318 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1319 } /* XXX */ 1320 1321 #ifdef MAC 1322 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1323 /* 1324 * If this vnode is already allocated, and we're running 1325 * multi-label, attempt to perform a label association 1326 * from the extended attributes on the inode. 1327 */ 1328 error = mac_associate_vnode_extattr(mp, vp); 1329 if (error) { 1330 /* ufs_inactive will release ip->i_devvp ref. */ 1331 vput(vp); 1332 *vpp = NULL; 1333 return (error); 1334 } 1335 } 1336 #endif 1337 1338 *vpp = vp; 1339 return (0); 1340 } 1341 1342 /* 1343 * File handle to vnode 1344 * 1345 * Have to be really careful about stale file handles: 1346 * - check that the inode number is valid 1347 * - call ffs_vget() to get the locked inode 1348 * - check for an unallocated inode (i_mode == 0) 1349 * - check that the given client host has export rights and return 1350 * those rights via. exflagsp and credanonp 1351 */ 1352 int 1353 ffs_fhtovp(mp, fhp, vpp) 1354 struct mount *mp; 1355 struct fid *fhp; 1356 struct vnode **vpp; 1357 { 1358 struct ufid *ufhp; 1359 struct fs *fs; 1360 1361 ufhp = (struct ufid *)fhp; 1362 fs = VFSTOUFS(mp)->um_fs; 1363 if (ufhp->ufid_ino < ROOTINO || 1364 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1365 return (ESTALE); 1366 return (ufs_fhtovp(mp, ufhp, vpp)); 1367 } 1368 1369 /* 1370 * Vnode pointer to File handle 1371 */ 1372 /* ARGSUSED */ 1373 int 1374 ffs_vptofh(vp, fhp) 1375 struct vnode *vp; 1376 struct fid *fhp; 1377 { 1378 struct inode *ip; 1379 struct ufid *ufhp; 1380 1381 ip = VTOI(vp); 1382 ufhp = (struct ufid *)fhp; 1383 ufhp->ufid_len = sizeof(struct ufid); 1384 ufhp->ufid_ino = ip->i_number; 1385 ufhp->ufid_gen = ip->i_gen; 1386 return (0); 1387 } 1388 1389 /* 1390 * Initialize the filesystem. 1391 */ 1392 static int 1393 ffs_init(vfsp) 1394 struct vfsconf *vfsp; 1395 { 1396 1397 softdep_initialize(); 1398 return (ufs_init(vfsp)); 1399 } 1400 1401 /* 1402 * Undo the work of ffs_init(). 1403 */ 1404 static int 1405 ffs_uninit(vfsp) 1406 struct vfsconf *vfsp; 1407 { 1408 int ret; 1409 1410 ret = ufs_uninit(vfsp); 1411 softdep_uninitialize(); 1412 return (ret); 1413 } 1414 1415 /* 1416 * Write a superblock and associated information back to disk. 1417 */ 1418 static int 1419 ffs_sbupdate(mp, waitfor) 1420 struct ufsmount *mp; 1421 int waitfor; 1422 { 1423 struct fs *fs = mp->um_fs; 1424 struct buf *sbbp; 1425 struct buf *bp; 1426 int blks; 1427 void *space; 1428 int i, size, error, allerror = 0; 1429 1430 if (fs->fs_ronly == 1 && 1431 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1432 (MNT_RDONLY | MNT_UPDATE)) 1433 panic("ffs_sbupdate: write read-only filesystem"); 1434 /* 1435 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1436 */ 1437 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1438 0, 0, 0); 1439 /* 1440 * First write back the summary information. 1441 */ 1442 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1443 space = fs->fs_csp; 1444 for (i = 0; i < blks; i += fs->fs_frag) { 1445 size = fs->fs_bsize; 1446 if (i + fs->fs_frag > blks) 1447 size = (blks - i) * fs->fs_fsize; 1448 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1449 size, 0, 0, 0); 1450 bcopy(space, bp->b_data, (u_int)size); 1451 space = (char *)space + size; 1452 if (waitfor != MNT_WAIT) 1453 bawrite(bp); 1454 else if ((error = bwrite(bp)) != 0) 1455 allerror = error; 1456 } 1457 /* 1458 * Now write back the superblock itself. If any errors occurred 1459 * up to this point, then fail so that the superblock avoids 1460 * being written out as clean. 1461 */ 1462 if (allerror) { 1463 brelse(sbbp); 1464 return (allerror); 1465 } 1466 bp = sbbp; 1467 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1468 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1469 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1470 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1471 fs->fs_sblockloc = SBLOCK_UFS1; 1472 } 1473 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1474 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1475 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1476 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1477 fs->fs_sblockloc = SBLOCK_UFS2; 1478 } 1479 fs->fs_fmod = 0; 1480 fs->fs_time = time_second; 1481 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1482 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1483 if (waitfor != MNT_WAIT) 1484 bawrite(bp); 1485 else if ((error = bwrite(bp)) != 0) 1486 allerror = error; 1487 return (allerror); 1488 } 1489 1490 static int 1491 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1492 int attrnamespace, const char *attrname, struct thread *td) 1493 { 1494 1495 #ifdef UFS_EXTATTR 1496 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1497 attrname, td)); 1498 #else 1499 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1500 attrname, td)); 1501 #endif 1502 } 1503 1504 static void 1505 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1506 { 1507 1508 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1509 uma_zfree(uma_ufs1, ip->i_din1); 1510 else if (ip->i_din2 != NULL) 1511 uma_zfree(uma_ufs2, ip->i_din2); 1512 uma_zfree(uma_inode, ip); 1513 } 1514 1515 static int dobkgrdwrite = 1; 1516 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1517 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1518 1519 /* 1520 * Complete a background write started from bwrite. 1521 */ 1522 static void 1523 ffs_backgroundwritedone(struct buf *bp) 1524 { 1525 struct buf *origbp; 1526 1527 /* 1528 * Find the original buffer that we are writing. 1529 */ 1530 BO_LOCK(bp->b_bufobj); 1531 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1532 panic("backgroundwritedone: lost buffer"); 1533 BO_UNLOCK(bp->b_bufobj); 1534 /* 1535 * Process dependencies then return any unfinished ones. 1536 */ 1537 if (LIST_FIRST(&bp->b_dep) != NULL) 1538 buf_complete(bp); 1539 #ifdef SOFTUPDATES 1540 if (LIST_FIRST(&bp->b_dep) != NULL) 1541 softdep_move_dependencies(bp, origbp); 1542 #endif 1543 1544 /* 1545 * This buffer is marked B_NOCACHE, so when it is released 1546 * by biodone, it will be tossed. We mark it with BIO_READ 1547 * to avoid biodone doing a second bufobj_wdrop. 1548 */ 1549 bp->b_flags |= B_NOCACHE; 1550 bp->b_iocmd = BIO_READ; 1551 bp->b_flags &= ~(B_CACHE | B_DONE); 1552 bp->b_iodone = 0; 1553 bufdone(bp); 1554 BO_LOCK(origbp->b_bufobj); 1555 /* 1556 * Clear the BV_BKGRDINPROG flag in the original buffer 1557 * and awaken it if it is waiting for the write to complete. 1558 * If BV_BKGRDINPROG is not set in the original buffer it must 1559 * have been released and re-instantiated - which is not legal. 1560 */ 1561 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1562 ("backgroundwritedone: lost buffer2")); 1563 origbp->b_vflags &= ~BV_BKGRDINPROG; 1564 if (origbp->b_vflags & BV_BKGRDWAIT) { 1565 origbp->b_vflags &= ~BV_BKGRDWAIT; 1566 wakeup(&origbp->b_xflags); 1567 } 1568 BO_UNLOCK(origbp->b_bufobj); 1569 } 1570 1571 1572 /* 1573 * Write, release buffer on completion. (Done by iodone 1574 * if async). Do not bother writing anything if the buffer 1575 * is invalid. 1576 * 1577 * Note that we set B_CACHE here, indicating that buffer is 1578 * fully valid and thus cacheable. This is true even of NFS 1579 * now so we set it generally. This could be set either here 1580 * or in biodone() since the I/O is synchronous. We put it 1581 * here. 1582 */ 1583 static int 1584 ffs_bufwrite(struct buf *bp) 1585 { 1586 int oldflags, s; 1587 struct buf *newbp; 1588 1589 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1590 if (bp->b_flags & B_INVAL) { 1591 brelse(bp); 1592 return (0); 1593 } 1594 1595 oldflags = bp->b_flags; 1596 1597 if (BUF_REFCNT(bp) == 0) 1598 panic("bufwrite: buffer is not busy???"); 1599 s = splbio(); 1600 /* 1601 * If a background write is already in progress, delay 1602 * writing this block if it is asynchronous. Otherwise 1603 * wait for the background write to complete. 1604 */ 1605 BO_LOCK(bp->b_bufobj); 1606 if (bp->b_vflags & BV_BKGRDINPROG) { 1607 if (bp->b_flags & B_ASYNC) { 1608 BO_UNLOCK(bp->b_bufobj); 1609 splx(s); 1610 bdwrite(bp); 1611 return (0); 1612 } 1613 bp->b_vflags |= BV_BKGRDWAIT; 1614 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1615 if (bp->b_vflags & BV_BKGRDINPROG) 1616 panic("bufwrite: still writing"); 1617 } 1618 BO_UNLOCK(bp->b_bufobj); 1619 1620 /* Mark the buffer clean */ 1621 bundirty(bp); 1622 1623 /* 1624 * If this buffer is marked for background writing and we 1625 * do not have to wait for it, make a copy and write the 1626 * copy so as to leave this buffer ready for further use. 1627 * 1628 * This optimization eats a lot of memory. If we have a page 1629 * or buffer shortfall we can't do it. 1630 */ 1631 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1632 (bp->b_flags & B_ASYNC) && 1633 !vm_page_count_severe() && 1634 !buf_dirty_count_severe()) { 1635 KASSERT(bp->b_iodone == NULL, 1636 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1637 1638 /* get a new block */ 1639 newbp = geteblk(bp->b_bufsize); 1640 1641 /* 1642 * set it to be identical to the old block. We have to 1643 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1644 * to avoid confusing the splay tree and gbincore(). 1645 */ 1646 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1647 newbp->b_lblkno = bp->b_lblkno; 1648 newbp->b_xflags |= BX_BKGRDMARKER; 1649 BO_LOCK(bp->b_bufobj); 1650 bp->b_vflags |= BV_BKGRDINPROG; 1651 bgetvp(bp->b_vp, newbp); 1652 BO_UNLOCK(bp->b_bufobj); 1653 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1654 newbp->b_blkno = bp->b_blkno; 1655 newbp->b_offset = bp->b_offset; 1656 newbp->b_iodone = ffs_backgroundwritedone; 1657 newbp->b_flags |= B_ASYNC; 1658 newbp->b_flags &= ~B_INVAL; 1659 1660 #ifdef SOFTUPDATES 1661 /* move over the dependencies */ 1662 if (LIST_FIRST(&bp->b_dep) != NULL) 1663 softdep_move_dependencies(bp, newbp); 1664 #endif 1665 1666 /* 1667 * Initiate write on the copy, release the original to 1668 * the B_LOCKED queue so that it cannot go away until 1669 * the background write completes. If not locked it could go 1670 * away and then be reconstituted while it was being written. 1671 * If the reconstituted buffer were written, we could end up 1672 * with two background copies being written at the same time. 1673 */ 1674 bqrelse(bp); 1675 bp = newbp; 1676 } 1677 1678 /* Let the normal bufwrite do the rest for us */ 1679 bufwrite(bp); 1680 1681 return (0); 1682 } 1683 1684 1685 static void 1686 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1687 { 1688 1689 #ifdef SOFTUPDATES 1690 if (bp->b_iocmd == BIO_WRITE && softdep_disk_prewrite(bp)) 1691 return; 1692 #endif 1693 g_vfs_strategy(bo, bp); 1694 } 1695