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 static 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_unmount_t ffs_unmount; 85 static vfs_mount_t ffs_mount; 86 static vfs_statfs_t ffs_statfs; 87 static vfs_fhtovp_t ffs_fhtovp; 88 static vfs_vptofh_t ffs_vptofh; 89 static vfs_sync_t ffs_sync; 90 91 static struct vfsops ufs_vfsops = { 92 .vfs_extattrctl = ffs_extattrctl, 93 .vfs_fhtovp = ffs_fhtovp, 94 .vfs_init = ffs_init, 95 .vfs_mount = ffs_mount, 96 .vfs_cmount = ffs_cmount, 97 .vfs_quotactl = ufs_quotactl, 98 .vfs_root = ufs_root, 99 .vfs_statfs = ffs_statfs, 100 .vfs_sync = ffs_sync, 101 .vfs_uninit = ffs_uninit, 102 .vfs_unmount = ffs_unmount, 103 .vfs_vget = ffs_vget, 104 .vfs_vptofh = ffs_vptofh, 105 }; 106 107 VFS_SET(ufs_vfsops, ufs, 0); 108 109 static b_strategy_t ffs_geom_strategy; 110 static b_write_t ffs_bufwrite; 111 112 static struct buf_ops ffs_ops = { 113 .bop_name = "FFS", 114 .bop_write = ffs_bufwrite, 115 .bop_strategy = ffs_geom_strategy, 116 .bop_sync = bufsync, 117 }; 118 119 static const char *ffs_opts[] = { "from", "export", NULL }; 120 121 static int 122 ffs_mount(struct mount *mp, struct thread *td) 123 { 124 struct vnode *devvp; 125 struct ufsmount *ump = 0; 126 struct fs *fs; 127 int error, flags; 128 mode_t accessmode; 129 struct nameidata ndp; 130 struct export_args export; 131 char *fspec; 132 133 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 134 return (EINVAL); 135 if (uma_inode == NULL) { 136 uma_inode = uma_zcreate("FFS inode", 137 sizeof(struct inode), NULL, NULL, NULL, NULL, 138 UMA_ALIGN_PTR, 0); 139 uma_ufs1 = uma_zcreate("FFS1 dinode", 140 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 141 UMA_ALIGN_PTR, 0); 142 uma_ufs2 = uma_zcreate("FFS2 dinode", 143 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 144 UMA_ALIGN_PTR, 0); 145 } 146 147 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 148 if (error) 149 return (error); 150 151 /* 152 * If updating, check whether changing from read-only to 153 * read/write; if there is no device name, that's all we do. 154 */ 155 if (mp->mnt_flag & MNT_UPDATE) { 156 ump = VFSTOUFS(mp); 157 fs = ump->um_fs; 158 devvp = ump->um_devvp; 159 if (fs->fs_ronly == 0 && 160 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 161 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 162 return (error); 163 /* 164 * Flush any dirty data. 165 */ 166 if ((error = ffs_sync(mp, MNT_WAIT, td)) != 0) { 167 vn_finished_write(mp); 168 return (error); 169 } 170 /* 171 * Check for and optionally get rid of files open 172 * for writing. 173 */ 174 flags = WRITECLOSE; 175 if (mp->mnt_flag & MNT_FORCE) 176 flags |= FORCECLOSE; 177 if (mp->mnt_flag & MNT_SOFTDEP) { 178 error = softdep_flushfiles(mp, flags, td); 179 } else { 180 error = ffs_flushfiles(mp, flags, td); 181 } 182 if (error) { 183 vn_finished_write(mp); 184 return (error); 185 } 186 if (fs->fs_pendingblocks != 0 || 187 fs->fs_pendinginodes != 0) { 188 printf("%s: %s: blocks %jd files %d\n", 189 fs->fs_fsmnt, "update error", 190 (intmax_t)fs->fs_pendingblocks, 191 fs->fs_pendinginodes); 192 fs->fs_pendingblocks = 0; 193 fs->fs_pendinginodes = 0; 194 } 195 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 196 fs->fs_clean = 1; 197 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 198 fs->fs_ronly = 0; 199 fs->fs_clean = 0; 200 vn_finished_write(mp); 201 return (error); 202 } 203 vn_finished_write(mp); 204 DROP_GIANT(); 205 g_topology_lock(); 206 g_access(ump->um_cp, 0, -1, 0); 207 g_topology_unlock(); 208 PICKUP_GIANT(); 209 fs->fs_ronly = 1; 210 mp->mnt_flag |= MNT_RDONLY; 211 } 212 if ((mp->mnt_flag & MNT_RELOAD) && 213 (error = ffs_reload(mp, td)) != 0) 214 return (error); 215 if (fs->fs_ronly && 216 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 217 /* 218 * If upgrade to read-write by non-root, then verify 219 * that user has necessary permissions on the device. 220 */ 221 if (suser(td)) { 222 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 223 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 224 td->td_ucred, td)) != 0) { 225 VOP_UNLOCK(devvp, 0, td); 226 return (error); 227 } 228 VOP_UNLOCK(devvp, 0, td); 229 } 230 fs->fs_flags &= ~FS_UNCLEAN; 231 if (fs->fs_clean == 0) { 232 fs->fs_flags |= FS_UNCLEAN; 233 if ((mp->mnt_flag & MNT_FORCE) || 234 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 235 (fs->fs_flags & FS_DOSOFTDEP))) { 236 printf("WARNING: %s was not %s\n", 237 fs->fs_fsmnt, "properly dismounted"); 238 } else { 239 printf( 240 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 241 fs->fs_fsmnt); 242 return (EPERM); 243 } 244 } 245 DROP_GIANT(); 246 g_topology_lock(); 247 /* 248 * If we're the root device, we may not have an E count 249 * yet, get it now. 250 */ 251 if (ump->um_cp->ace == 0) 252 error = g_access(ump->um_cp, 0, 1, 1); 253 else 254 error = g_access(ump->um_cp, 0, 1, 0); 255 g_topology_unlock(); 256 PICKUP_GIANT(); 257 if (error) 258 return (error); 259 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 260 return (error); 261 fs->fs_ronly = 0; 262 mp->mnt_flag &= ~MNT_RDONLY; 263 fs->fs_clean = 0; 264 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 265 vn_finished_write(mp); 266 return (error); 267 } 268 /* check to see if we need to start softdep */ 269 if ((fs->fs_flags & FS_DOSOFTDEP) && 270 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 271 vn_finished_write(mp); 272 return (error); 273 } 274 if (fs->fs_snapinum[0] != 0) 275 ffs_snapshot_mount(mp); 276 vn_finished_write(mp); 277 } 278 /* 279 * Soft updates is incompatible with "async", 280 * so if we are doing softupdates stop the user 281 * from setting the async flag in an update. 282 * Softdep_mount() clears it in an initial mount 283 * or ro->rw remount. 284 */ 285 if (mp->mnt_flag & MNT_SOFTDEP) 286 mp->mnt_flag &= ~MNT_ASYNC; 287 /* 288 * Keep MNT_ACLS flag if it is stored in superblock. 289 */ 290 if ((fs->fs_flags & FS_ACLS) != 0) 291 mp->mnt_flag |= MNT_ACLS; 292 /* 293 * If not updating name, process export requests. 294 */ 295 error = vfs_copyopt(mp->mnt_optnew, "export", &export, sizeof export); 296 if (error == 0 && export.ex_flags != 0) 297 return (vfs_export(mp, &export)); 298 /* 299 * If this is a snapshot request, take the snapshot. 300 */ 301 if (mp->mnt_flag & MNT_SNAPSHOT) 302 return (ffs_snapshot(mp, fspec)); 303 } 304 305 /* 306 * Not an update, or updating the name: look up the name 307 * and verify that it refers to a sensible disk device. 308 */ 309 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 310 if ((error = namei(&ndp)) != 0) 311 return (error); 312 NDFREE(&ndp, NDF_ONLY_PNBUF); 313 devvp = ndp.ni_vp; 314 if (!vn_isdisk(devvp, &error)) { 315 vrele(devvp); 316 return (error); 317 } 318 319 /* 320 * If mount by non-root, then verify that user has necessary 321 * permissions on the device. 322 */ 323 if (suser(td)) { 324 accessmode = VREAD; 325 if ((mp->mnt_flag & MNT_RDONLY) == 0) 326 accessmode |= VWRITE; 327 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 328 if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){ 329 vput(devvp); 330 return (error); 331 } 332 VOP_UNLOCK(devvp, 0, td); 333 } 334 335 if (mp->mnt_flag & MNT_UPDATE) { 336 /* 337 * Update only 338 * 339 * If it's not the same vnode, or at least the same device 340 * then it's not correct. 341 */ 342 343 if (devvp->v_rdev != ump->um_devvp->v_rdev) 344 error = EINVAL; /* needs translation */ 345 vrele(devvp); 346 if (error) 347 return (error); 348 } else { 349 /* 350 * New mount 351 * 352 * We need the name for the mount point (also used for 353 * "last mounted on") copied in. If an error occurs, 354 * the mount point is discarded by the upper level code. 355 * Note that vfs_mount() populates f_mntonname for us. 356 */ 357 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 358 vrele(devvp); 359 return (error); 360 } 361 } 362 vfs_mountedfrom(mp, fspec); 363 return (0); 364 } 365 366 /* 367 * Compatibility with old mount system call. 368 */ 369 370 static int 371 ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 372 { 373 struct ufs_args args; 374 int error; 375 376 if (data == NULL) 377 return (EINVAL); 378 error = copyin(data, &args, sizeof args); 379 if (error) 380 return (error); 381 382 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 383 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 384 error = kernel_mount(ma, flags); 385 386 return (error); 387 } 388 389 /* 390 * Reload all incore data for a filesystem (used after running fsck on 391 * the root filesystem and finding things to fix). The filesystem must 392 * be mounted read-only. 393 * 394 * Things to do to update the mount: 395 * 1) invalidate all cached meta-data. 396 * 2) re-read superblock from disk. 397 * 3) re-read summary information from disk. 398 * 4) invalidate all inactive vnodes. 399 * 5) invalidate all cached file data. 400 * 6) re-read inode data for all active vnodes. 401 */ 402 static int 403 ffs_reload(struct mount *mp, struct thread *td) 404 { 405 struct vnode *vp, *nvp, *devvp; 406 struct inode *ip; 407 void *space; 408 struct buf *bp; 409 struct fs *fs, *newfs; 410 struct ufsmount *ump; 411 ufs2_daddr_t sblockloc; 412 int i, blks, size, error; 413 int32_t *lp; 414 415 if ((mp->mnt_flag & MNT_RDONLY) == 0) 416 return (EINVAL); 417 ump = VFSTOUFS(mp); 418 /* 419 * Step 1: invalidate all cached meta-data. 420 */ 421 devvp = VFSTOUFS(mp)->um_devvp; 422 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 423 if (vinvalbuf(devvp, 0, td, 0, 0) != 0) 424 panic("ffs_reload: dirty1"); 425 VOP_UNLOCK(devvp, 0, td); 426 427 /* 428 * Step 2: re-read superblock from disk. 429 */ 430 fs = VFSTOUFS(mp)->um_fs; 431 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 432 NOCRED, &bp)) != 0) 433 return (error); 434 newfs = (struct fs *)bp->b_data; 435 if ((newfs->fs_magic != FS_UFS1_MAGIC && 436 newfs->fs_magic != FS_UFS2_MAGIC) || 437 newfs->fs_bsize > MAXBSIZE || 438 newfs->fs_bsize < sizeof(struct fs)) { 439 brelse(bp); 440 return (EIO); /* XXX needs translation */ 441 } 442 /* 443 * Copy pointer fields back into superblock before copying in XXX 444 * new superblock. These should really be in the ufsmount. XXX 445 * Note that important parameters (eg fs_ncg) are unchanged. 446 */ 447 newfs->fs_csp = fs->fs_csp; 448 newfs->fs_maxcluster = fs->fs_maxcluster; 449 newfs->fs_contigdirs = fs->fs_contigdirs; 450 newfs->fs_active = fs->fs_active; 451 /* The file system is still read-only. */ 452 newfs->fs_ronly = 1; 453 sblockloc = fs->fs_sblockloc; 454 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 455 brelse(bp); 456 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 457 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 458 UFS_LOCK(ump); 459 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 460 printf("%s: reload pending error: blocks %jd files %d\n", 461 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 462 fs->fs_pendinginodes); 463 fs->fs_pendingblocks = 0; 464 fs->fs_pendinginodes = 0; 465 } 466 UFS_UNLOCK(ump); 467 468 /* 469 * Step 3: re-read summary information from disk. 470 */ 471 blks = howmany(fs->fs_cssize, fs->fs_fsize); 472 space = fs->fs_csp; 473 for (i = 0; i < blks; i += fs->fs_frag) { 474 size = fs->fs_bsize; 475 if (i + fs->fs_frag > blks) 476 size = (blks - i) * fs->fs_fsize; 477 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 478 NOCRED, &bp); 479 if (error) 480 return (error); 481 bcopy(bp->b_data, space, (u_int)size); 482 space = (char *)space + size; 483 brelse(bp); 484 } 485 /* 486 * We no longer know anything about clusters per cylinder group. 487 */ 488 if (fs->fs_contigsumsize > 0) { 489 lp = fs->fs_maxcluster; 490 for (i = 0; i < fs->fs_ncg; i++) 491 *lp++ = fs->fs_contigsumsize; 492 } 493 494 loop: 495 MNT_ILOCK(mp); 496 MNT_VNODE_FOREACH(vp, mp, nvp) { 497 VI_LOCK(vp); 498 if (vp->v_iflag & VI_XLOCK) { 499 VI_UNLOCK(vp); 500 continue; 501 } 502 MNT_IUNLOCK(mp); 503 /* 504 * Step 4: invalidate all inactive vnodes. 505 */ 506 if (vp->v_usecount == 0) { 507 vgonel(vp, td); 508 goto loop; 509 } 510 /* 511 * Step 5: invalidate all cached file data. 512 */ 513 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 514 goto loop; 515 } 516 if (vinvalbuf(vp, 0, td, 0, 0)) 517 panic("ffs_reload: dirty2"); 518 /* 519 * Step 6: re-read inode data for all active vnodes. 520 */ 521 ip = VTOI(vp); 522 error = 523 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 524 (int)fs->fs_bsize, NOCRED, &bp); 525 if (error) { 526 VOP_UNLOCK(vp, 0, td); 527 vrele(vp); 528 return (error); 529 } 530 ffs_load_inode(bp, ip, fs, ip->i_number); 531 ip->i_effnlink = ip->i_nlink; 532 brelse(bp); 533 VOP_UNLOCK(vp, 0, td); 534 vrele(vp); 535 MNT_ILOCK(mp); 536 } 537 MNT_IUNLOCK(mp); 538 return (0); 539 } 540 541 /* 542 * Possible superblock locations ordered from most to least likely. 543 */ 544 static int sblock_try[] = SBLOCKSEARCH; 545 546 /* 547 * Common code for mount and mountroot 548 */ 549 static int 550 ffs_mountfs(devvp, mp, td) 551 struct vnode *devvp; 552 struct mount *mp; 553 struct thread *td; 554 { 555 struct ufsmount *ump; 556 struct buf *bp; 557 struct fs *fs; 558 struct cdev *dev; 559 void *space; 560 ufs2_daddr_t sblockloc; 561 int error, i, blks, size, ronly; 562 int32_t *lp; 563 struct ucred *cred; 564 struct g_consumer *cp; 565 566 dev = devvp->v_rdev; 567 cred = td ? td->td_ucred : NOCRED; 568 569 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 570 DROP_GIANT(); 571 g_topology_lock(); 572 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 573 574 /* 575 * If we are a root mount, drop the E flag so fsck can do its magic. 576 * We will pick it up again when we remount R/W. 577 */ 578 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 579 error = g_access(cp, 0, 0, -1); 580 g_topology_unlock(); 581 PICKUP_GIANT(); 582 VOP_UNLOCK(devvp, 0, td); 583 if (error) 584 return (error); 585 if (devvp->v_rdev->si_iosize_max != 0) 586 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 587 if (mp->mnt_iosize_max > MAXPHYS) 588 mp->mnt_iosize_max = MAXPHYS; 589 590 devvp->v_bufobj.bo_private = cp; 591 devvp->v_bufobj.bo_ops = &ffs_ops; 592 593 bp = NULL; 594 ump = NULL; 595 fs = NULL; 596 sblockloc = 0; 597 /* 598 * Try reading the superblock in each of its possible locations. 599 */ 600 for (i = 0; sblock_try[i] != -1; i++) { 601 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 602 cred, &bp)) != 0) 603 goto out; 604 fs = (struct fs *)bp->b_data; 605 sblockloc = sblock_try[i]; 606 if ((fs->fs_magic == FS_UFS1_MAGIC || 607 (fs->fs_magic == FS_UFS2_MAGIC && 608 (fs->fs_sblockloc == sblockloc || 609 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 610 fs->fs_bsize <= MAXBSIZE && 611 fs->fs_bsize >= sizeof(struct fs)) 612 break; 613 brelse(bp); 614 bp = NULL; 615 } 616 if (sblock_try[i] == -1) { 617 error = EINVAL; /* XXX needs translation */ 618 goto out; 619 } 620 fs->fs_fmod = 0; 621 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 622 fs->fs_flags &= ~FS_UNCLEAN; 623 if (fs->fs_clean == 0) { 624 fs->fs_flags |= FS_UNCLEAN; 625 if (ronly || (mp->mnt_flag & MNT_FORCE) || 626 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 627 (fs->fs_flags & FS_DOSOFTDEP))) { 628 printf( 629 "WARNING: %s was not properly dismounted\n", 630 fs->fs_fsmnt); 631 } else { 632 printf( 633 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 634 fs->fs_fsmnt); 635 error = EPERM; 636 goto out; 637 } 638 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 639 (mp->mnt_flag & MNT_FORCE)) { 640 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 641 (intmax_t)fs->fs_pendingblocks, 642 fs->fs_pendinginodes); 643 fs->fs_pendingblocks = 0; 644 fs->fs_pendinginodes = 0; 645 } 646 } 647 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 648 printf("%s: mount pending error: blocks %jd files %d\n", 649 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 650 fs->fs_pendinginodes); 651 fs->fs_pendingblocks = 0; 652 fs->fs_pendinginodes = 0; 653 } 654 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 655 ump->um_cp = cp; 656 ump->um_bo = &devvp->v_bufobj; 657 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 658 if (fs->fs_magic == FS_UFS1_MAGIC) { 659 ump->um_fstype = UFS1; 660 ump->um_balloc = ffs_balloc_ufs1; 661 } else { 662 ump->um_fstype = UFS2; 663 ump->um_balloc = ffs_balloc_ufs2; 664 } 665 ump->um_blkatoff = ffs_blkatoff; 666 ump->um_truncate = ffs_truncate; 667 ump->um_update = ffs_update; 668 ump->um_valloc = ffs_valloc; 669 ump->um_vfree = ffs_vfree; 670 ump->um_ifree = ffs_ifree; 671 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 672 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 673 if (fs->fs_sbsize < SBLOCKSIZE) 674 bp->b_flags |= B_INVAL | B_NOCACHE; 675 brelse(bp); 676 bp = NULL; 677 fs = ump->um_fs; 678 ffs_oldfscompat_read(fs, ump, sblockloc); 679 fs->fs_ronly = ronly; 680 size = fs->fs_cssize; 681 blks = howmany(size, fs->fs_fsize); 682 if (fs->fs_contigsumsize > 0) 683 size += fs->fs_ncg * sizeof(int32_t); 684 size += fs->fs_ncg * sizeof(u_int8_t); 685 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 686 fs->fs_csp = space; 687 for (i = 0; i < blks; i += fs->fs_frag) { 688 size = fs->fs_bsize; 689 if (i + fs->fs_frag > blks) 690 size = (blks - i) * fs->fs_fsize; 691 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 692 cred, &bp)) != 0) { 693 free(fs->fs_csp, M_UFSMNT); 694 goto out; 695 } 696 bcopy(bp->b_data, space, (u_int)size); 697 space = (char *)space + size; 698 brelse(bp); 699 bp = NULL; 700 } 701 if (fs->fs_contigsumsize > 0) { 702 fs->fs_maxcluster = lp = space; 703 for (i = 0; i < fs->fs_ncg; i++) 704 *lp++ = fs->fs_contigsumsize; 705 space = lp; 706 } 707 size = fs->fs_ncg * sizeof(u_int8_t); 708 fs->fs_contigdirs = (u_int8_t *)space; 709 bzero(fs->fs_contigdirs, size); 710 fs->fs_active = NULL; 711 mp->mnt_data = (qaddr_t)ump; 712 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 713 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 714 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 715 vfs_getvfs(&mp->mnt_stat.f_fsid)) 716 vfs_getnewfsid(mp); 717 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 718 mp->mnt_flag |= MNT_LOCAL; 719 if ((fs->fs_flags & FS_MULTILABEL) != 0) 720 #ifdef MAC 721 mp->mnt_flag |= MNT_MULTILABEL; 722 #else 723 printf( 724 "WARNING: %s: multilabel flag on fs but no MAC support\n", 725 fs->fs_fsmnt); 726 #endif 727 if ((fs->fs_flags & FS_ACLS) != 0) 728 #ifdef UFS_ACL 729 mp->mnt_flag |= MNT_ACLS; 730 #else 731 printf( 732 "WARNING: %s: ACLs flag on fs but no ACLs support\n", 733 fs->fs_fsmnt); 734 #endif 735 ump->um_mountp = mp; 736 ump->um_dev = dev; 737 ump->um_devvp = devvp; 738 ump->um_nindir = fs->fs_nindir; 739 ump->um_bptrtodb = fs->fs_fsbtodb; 740 ump->um_seqinc = fs->fs_frag; 741 for (i = 0; i < MAXQUOTAS; i++) 742 ump->um_quotas[i] = NULLVP; 743 #ifdef UFS_EXTATTR 744 ufs_extattr_uepm_init(&ump->um_extattr); 745 #endif 746 /* 747 * Set FS local "last mounted on" information (NULL pad) 748 */ 749 vfs_mountedfrom(mp, fs->fs_fsmnt); 750 751 if( mp->mnt_flag & MNT_ROOTFS) { 752 /* 753 * Root mount; update timestamp in mount structure. 754 * this will be used by the common root mount code 755 * to update the system clock. 756 */ 757 mp->mnt_time = fs->fs_time; 758 } 759 760 if (ronly == 0) { 761 if ((fs->fs_flags & FS_DOSOFTDEP) && 762 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 763 free(fs->fs_csp, M_UFSMNT); 764 goto out; 765 } 766 if (fs->fs_snapinum[0] != 0) 767 ffs_snapshot_mount(mp); 768 fs->fs_fmod = 1; 769 fs->fs_clean = 0; 770 (void) ffs_sbupdate(ump, MNT_WAIT); 771 } 772 /* 773 * Initialize filesystem stat information in mount struct. 774 */ 775 #ifdef UFS_EXTATTR 776 #ifdef UFS_EXTATTR_AUTOSTART 777 /* 778 * 779 * Auto-starting does the following: 780 * - check for /.attribute in the fs, and extattr_start if so 781 * - for each file in .attribute, enable that file with 782 * an attribute of the same name. 783 * Not clear how to report errors -- probably eat them. 784 * This would all happen while the filesystem was busy/not 785 * available, so would effectively be "atomic". 786 */ 787 (void) ufs_extattr_autostart(mp, td); 788 #endif /* !UFS_EXTATTR_AUTOSTART */ 789 #endif /* !UFS_EXTATTR */ 790 #ifndef QUOTA 791 mp->mnt_kern_flag |= MNTK_MPSAFE; 792 #endif 793 return (0); 794 out: 795 if (bp) 796 brelse(bp); 797 vinvalbuf(devvp, V_SAVE, td, 0, 0); 798 if (cp != NULL) { 799 DROP_GIANT(); 800 g_topology_lock(); 801 g_vfs_close(cp, td); 802 g_topology_unlock(); 803 PICKUP_GIANT(); 804 } 805 if (ump) { 806 mtx_destroy(UFS_MTX(ump)); 807 free(ump->um_fs, M_UFSMNT); 808 free(ump, M_UFSMNT); 809 mp->mnt_data = (qaddr_t)0; 810 } 811 return (error); 812 } 813 814 #include <sys/sysctl.h> 815 static int bigcgs = 0; 816 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 817 818 /* 819 * Sanity checks for loading old filesystem superblocks. 820 * See ffs_oldfscompat_write below for unwound actions. 821 * 822 * XXX - Parts get retired eventually. 823 * Unfortunately new bits get added. 824 */ 825 static void 826 ffs_oldfscompat_read(fs, ump, sblockloc) 827 struct fs *fs; 828 struct ufsmount *ump; 829 ufs2_daddr_t sblockloc; 830 { 831 off_t maxfilesize; 832 833 /* 834 * If not yet done, update fs_flags location and value of fs_sblockloc. 835 */ 836 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 837 fs->fs_flags = fs->fs_old_flags; 838 fs->fs_old_flags |= FS_FLAGS_UPDATED; 839 fs->fs_sblockloc = sblockloc; 840 } 841 /* 842 * If not yet done, update UFS1 superblock with new wider fields. 843 */ 844 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 845 fs->fs_maxbsize = fs->fs_bsize; 846 fs->fs_time = fs->fs_old_time; 847 fs->fs_size = fs->fs_old_size; 848 fs->fs_dsize = fs->fs_old_dsize; 849 fs->fs_csaddr = fs->fs_old_csaddr; 850 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 851 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 852 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 853 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 854 } 855 if (fs->fs_magic == FS_UFS1_MAGIC && 856 fs->fs_old_inodefmt < FS_44INODEFMT) { 857 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 858 fs->fs_qbmask = ~fs->fs_bmask; 859 fs->fs_qfmask = ~fs->fs_fmask; 860 } 861 if (fs->fs_magic == FS_UFS1_MAGIC) { 862 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 863 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 864 if (fs->fs_maxfilesize > maxfilesize) 865 fs->fs_maxfilesize = maxfilesize; 866 } 867 /* Compatibility for old filesystems */ 868 if (fs->fs_avgfilesize <= 0) 869 fs->fs_avgfilesize = AVFILESIZ; 870 if (fs->fs_avgfpdir <= 0) 871 fs->fs_avgfpdir = AFPDIR; 872 if (bigcgs) { 873 fs->fs_save_cgsize = fs->fs_cgsize; 874 fs->fs_cgsize = fs->fs_bsize; 875 } 876 } 877 878 /* 879 * Unwinding superblock updates for old filesystems. 880 * See ffs_oldfscompat_read above for details. 881 * 882 * XXX - Parts get retired eventually. 883 * Unfortunately new bits get added. 884 */ 885 static void 886 ffs_oldfscompat_write(fs, ump) 887 struct fs *fs; 888 struct ufsmount *ump; 889 { 890 891 /* 892 * Copy back UFS2 updated fields that UFS1 inspects. 893 */ 894 if (fs->fs_magic == FS_UFS1_MAGIC) { 895 fs->fs_old_time = fs->fs_time; 896 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 897 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 898 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 899 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 900 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 901 } 902 if (bigcgs) { 903 fs->fs_cgsize = fs->fs_save_cgsize; 904 fs->fs_save_cgsize = 0; 905 } 906 } 907 908 /* 909 * unmount system call 910 */ 911 static int 912 ffs_unmount(mp, mntflags, td) 913 struct mount *mp; 914 int mntflags; 915 struct thread *td; 916 { 917 struct ufsmount *ump = VFSTOUFS(mp); 918 struct fs *fs; 919 int error, flags; 920 921 flags = 0; 922 if (mntflags & MNT_FORCE) { 923 flags |= FORCECLOSE; 924 } 925 #ifdef UFS_EXTATTR 926 if ((error = ufs_extattr_stop(mp, td))) { 927 if (error != EOPNOTSUPP) 928 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 929 error); 930 } else { 931 ufs_extattr_uepm_destroy(&ump->um_extattr); 932 } 933 #endif 934 if (mp->mnt_flag & MNT_SOFTDEP) { 935 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 936 return (error); 937 } else { 938 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 939 return (error); 940 } 941 fs = ump->um_fs; 942 UFS_LOCK(ump); 943 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 944 printf("%s: unmount pending error: blocks %jd files %d\n", 945 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 946 fs->fs_pendinginodes); 947 fs->fs_pendingblocks = 0; 948 fs->fs_pendinginodes = 0; 949 } 950 UFS_UNLOCK(ump); 951 if (fs->fs_ronly == 0) { 952 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 953 error = ffs_sbupdate(ump, MNT_WAIT); 954 if (error) { 955 fs->fs_clean = 0; 956 return (error); 957 } 958 } 959 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0); 960 DROP_GIANT(); 961 g_topology_lock(); 962 g_vfs_close(ump->um_cp, td); 963 g_topology_unlock(); 964 PICKUP_GIANT(); 965 vrele(ump->um_devvp); 966 mtx_destroy(UFS_MTX(ump)); 967 free(fs->fs_csp, M_UFSMNT); 968 free(fs, M_UFSMNT); 969 free(ump, M_UFSMNT); 970 mp->mnt_data = (qaddr_t)0; 971 mp->mnt_flag &= ~MNT_LOCAL; 972 return (error); 973 } 974 975 /* 976 * Flush out all the files in a filesystem. 977 */ 978 int 979 ffs_flushfiles(mp, flags, td) 980 struct mount *mp; 981 int flags; 982 struct thread *td; 983 { 984 struct ufsmount *ump; 985 int error; 986 987 ump = VFSTOUFS(mp); 988 #ifdef QUOTA 989 if (mp->mnt_flag & MNT_QUOTA) { 990 int i; 991 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 992 if (error) 993 return (error); 994 for (i = 0; i < MAXQUOTAS; i++) { 995 if (ump->um_quotas[i] == NULLVP) 996 continue; 997 quotaoff(td, mp, i); 998 } 999 /* 1000 * Here we fall through to vflush again to ensure 1001 * that we have gotten rid of all the system vnodes. 1002 */ 1003 } 1004 #endif 1005 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1006 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1007 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1008 return (error); 1009 ffs_snapshot_unmount(mp); 1010 /* 1011 * Here we fall through to vflush again to ensure 1012 * that we have gotten rid of all the system vnodes. 1013 */ 1014 } 1015 /* 1016 * Flush all the files. 1017 */ 1018 if ((error = vflush(mp, 0, flags, td)) != 0) 1019 return (error); 1020 /* 1021 * Flush filesystem metadata. 1022 */ 1023 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1024 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1025 VOP_UNLOCK(ump->um_devvp, 0, td); 1026 return (error); 1027 } 1028 1029 /* 1030 * Get filesystem statistics. 1031 */ 1032 static int 1033 ffs_statfs(mp, sbp, td) 1034 struct mount *mp; 1035 struct statfs *sbp; 1036 struct thread *td; 1037 { 1038 struct ufsmount *ump; 1039 struct fs *fs; 1040 1041 ump = VFSTOUFS(mp); 1042 fs = ump->um_fs; 1043 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1044 panic("ffs_statfs"); 1045 sbp->f_version = STATFS_VERSION; 1046 sbp->f_bsize = fs->fs_fsize; 1047 sbp->f_iosize = fs->fs_bsize; 1048 sbp->f_blocks = fs->fs_dsize; 1049 UFS_LOCK(ump); 1050 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1051 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1052 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1053 dbtofsb(fs, fs->fs_pendingblocks); 1054 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1055 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1056 UFS_UNLOCK(ump); 1057 sbp->f_namemax = NAME_MAX; 1058 return (0); 1059 } 1060 1061 /* 1062 * Go through the disk queues to initiate sandbagged IO; 1063 * go through the inodes to write those that have been modified; 1064 * initiate the writing of the super block if it has been modified. 1065 * 1066 * Note: we are always called with the filesystem marked `MPBUSY'. 1067 */ 1068 static int 1069 ffs_sync(mp, waitfor, td) 1070 struct mount *mp; 1071 int waitfor; 1072 struct thread *td; 1073 { 1074 struct vnode *nvp, *vp, *devvp; 1075 struct inode *ip; 1076 struct ufsmount *ump = VFSTOUFS(mp); 1077 struct fs *fs; 1078 int error, count, wait, lockreq, allerror = 0; 1079 struct bufobj *bo; 1080 1081 fs = ump->um_fs; 1082 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1083 printf("fs = %s\n", fs->fs_fsmnt); 1084 panic("ffs_sync: rofs mod"); 1085 } 1086 /* 1087 * Write back each (modified) inode. 1088 */ 1089 wait = 0; 1090 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1091 if (waitfor == MNT_WAIT) { 1092 wait = 1; 1093 lockreq = LK_EXCLUSIVE; 1094 } 1095 lockreq |= LK_INTERLOCK; 1096 MNT_ILOCK(mp); 1097 loop: 1098 MNT_VNODE_FOREACH(vp, mp, nvp) { 1099 /* 1100 * Depend on the mntvnode_slock to keep things stable enough 1101 * for a quick test. Since there might be hundreds of 1102 * thousands of vnodes, we cannot afford even a subroutine 1103 * call unless there's a good chance that we have work to do. 1104 */ 1105 VI_LOCK(vp); 1106 if (vp->v_iflag & VI_XLOCK) { 1107 VI_UNLOCK(vp); 1108 continue; 1109 } 1110 ip = VTOI(vp); 1111 if (vp->v_type == VNON || ((ip->i_flag & 1112 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1113 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1114 VI_UNLOCK(vp); 1115 continue; 1116 } 1117 MNT_IUNLOCK(mp); 1118 if ((error = vget(vp, lockreq, td)) != 0) { 1119 MNT_ILOCK(mp); 1120 if (error == ENOENT) 1121 goto loop; 1122 continue; 1123 } 1124 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1125 allerror = error; 1126 VOP_UNLOCK(vp, 0, td); 1127 vrele(vp); 1128 MNT_ILOCK(mp); 1129 } 1130 MNT_IUNLOCK(mp); 1131 /* 1132 * Force stale filesystem control information to be flushed. 1133 */ 1134 if (waitfor == MNT_WAIT) { 1135 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1136 allerror = error; 1137 /* Flushed work items may create new vnodes to clean */ 1138 if (allerror == 0 && count) { 1139 MNT_ILOCK(mp); 1140 goto loop; 1141 } 1142 } 1143 #ifdef QUOTA 1144 qsync(mp); 1145 #endif 1146 devvp = ump->um_devvp; 1147 VI_LOCK(devvp); 1148 bo = &devvp->v_bufobj; 1149 if (waitfor != MNT_LAZY && 1150 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1151 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1152 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1153 allerror = error; 1154 VOP_UNLOCK(devvp, 0, td); 1155 if (allerror == 0 && waitfor == MNT_WAIT) { 1156 MNT_ILOCK(mp); 1157 goto loop; 1158 } 1159 } else 1160 VI_UNLOCK(devvp); 1161 /* 1162 * Write back modified superblock. 1163 */ 1164 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1165 allerror = error; 1166 return (allerror); 1167 } 1168 1169 int 1170 ffs_vget(mp, ino, flags, vpp) 1171 struct mount *mp; 1172 ino_t ino; 1173 int flags; 1174 struct vnode **vpp; 1175 { 1176 struct thread *td = curthread; /* XXX */ 1177 struct fs *fs; 1178 struct inode *ip; 1179 struct ufsmount *ump; 1180 struct buf *bp; 1181 struct vnode *vp; 1182 struct cdev *dev; 1183 int error; 1184 1185 ump = VFSTOUFS(mp); 1186 dev = ump->um_dev; 1187 fs = ump->um_fs; 1188 1189 /* 1190 * We do not lock vnode creation as it is believed to be too 1191 * expensive for such rare case as simultaneous creation of vnode 1192 * for same ino by different processes. We just allow them to race 1193 * and check later to decide who wins. Let the race begin! 1194 */ 1195 if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) 1196 return (error); 1197 if (*vpp != NULL) 1198 return (0); 1199 1200 /* 1201 * If this MALLOC() is performed after the getnewvnode() 1202 * it might block, leaving a vnode with a NULL v_data to be 1203 * found by ffs_sync() if a sync happens to fire right then, 1204 * which will cause a panic because ffs_sync() blindly 1205 * dereferences vp->v_data (as well it should). 1206 */ 1207 ip = uma_zalloc(uma_inode, M_WAITOK); 1208 1209 /* Allocate a new vnode/inode. */ 1210 if (fs->fs_magic == FS_UFS1_MAGIC) 1211 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1212 else 1213 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1214 if (error) { 1215 *vpp = NULL; 1216 uma_zfree(uma_inode, ip); 1217 return (error); 1218 } 1219 bzero((caddr_t)ip, sizeof(struct inode)); 1220 /* 1221 * FFS supports recursive locking. 1222 */ 1223 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1224 vp->v_data = ip; 1225 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1226 ip->i_vnode = vp; 1227 ip->i_ump = ump; 1228 ip->i_fs = fs; 1229 ip->i_dev = dev; 1230 ip->i_number = ino; 1231 #ifdef QUOTA 1232 { 1233 int i; 1234 for (i = 0; i < MAXQUOTAS; i++) 1235 ip->i_dquot[i] = NODQUOT; 1236 } 1237 #endif 1238 /* 1239 * Exclusively lock the vnode before adding to hash. Note, that we 1240 * must not release nor downgrade the lock (despite flags argument 1241 * says) till it is fully initialized. 1242 */ 1243 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td); 1244 1245 /* 1246 * Atomicaly (in terms of ufs_hash operations) check the hash for 1247 * duplicate of vnode being created and add it to the hash. If a 1248 * duplicate vnode was found, it will be vget()ed from hash for us. 1249 */ 1250 if ((error = ufs_ihashins(ip, flags, vpp)) != 0) { 1251 vput(vp); 1252 *vpp = NULL; 1253 return (error); 1254 } 1255 1256 /* We lost the race, then throw away our vnode and return existing */ 1257 if (*vpp != NULL) { 1258 vput(vp); 1259 return (0); 1260 } 1261 1262 /* Read in the disk contents for the inode, copy into the inode. */ 1263 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1264 (int)fs->fs_bsize, NOCRED, &bp); 1265 if (error) { 1266 /* 1267 * The inode does not contain anything useful, so it would 1268 * be misleading to leave it on its hash chain. With mode 1269 * still zero, it will be unlinked and returned to the free 1270 * list by vput(). 1271 */ 1272 brelse(bp); 1273 vput(vp); 1274 *vpp = NULL; 1275 return (error); 1276 } 1277 if (ip->i_ump->um_fstype == UFS1) 1278 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1279 else 1280 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1281 ffs_load_inode(bp, ip, fs, ino); 1282 if (DOINGSOFTDEP(vp)) 1283 softdep_load_inodeblock(ip); 1284 else 1285 ip->i_effnlink = ip->i_nlink; 1286 bqrelse(bp); 1287 1288 /* 1289 * Initialize the vnode from the inode, check for aliases. 1290 * Note that the underlying vnode may have changed. 1291 */ 1292 if (ip->i_ump->um_fstype == UFS1) 1293 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1294 else 1295 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1296 if (error) { 1297 vput(vp); 1298 *vpp = NULL; 1299 return (error); 1300 } 1301 /* 1302 * Finish inode initialization. 1303 */ 1304 VREF(ip->i_devvp); 1305 /* 1306 * Set up a generation number for this inode if it does not 1307 * already have one. This should only happen on old filesystems. 1308 */ 1309 if (ip->i_gen == 0) { 1310 ip->i_gen = arc4random() / 2 + 1; 1311 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1312 ip->i_flag |= IN_MODIFIED; 1313 DIP_SET(ip, i_gen, ip->i_gen); 1314 } 1315 } 1316 /* 1317 * Ensure that uid and gid are correct. This is a temporary 1318 * fix until fsck has been changed to do the update. 1319 */ 1320 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1321 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1322 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1323 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1324 } /* XXX */ 1325 1326 #ifdef MAC 1327 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1328 /* 1329 * If this vnode is already allocated, and we're running 1330 * multi-label, attempt to perform a label association 1331 * from the extended attributes on the inode. 1332 */ 1333 error = mac_associate_vnode_extattr(mp, vp); 1334 if (error) { 1335 /* ufs_inactive will release ip->i_devvp ref. */ 1336 vput(vp); 1337 *vpp = NULL; 1338 return (error); 1339 } 1340 } 1341 #endif 1342 1343 *vpp = vp; 1344 return (0); 1345 } 1346 1347 /* 1348 * File handle to vnode 1349 * 1350 * Have to be really careful about stale file handles: 1351 * - check that the inode number is valid 1352 * - call ffs_vget() to get the locked inode 1353 * - check for an unallocated inode (i_mode == 0) 1354 * - check that the given client host has export rights and return 1355 * those rights via. exflagsp and credanonp 1356 */ 1357 static int 1358 ffs_fhtovp(mp, fhp, vpp) 1359 struct mount *mp; 1360 struct fid *fhp; 1361 struct vnode **vpp; 1362 { 1363 struct ufid *ufhp; 1364 struct fs *fs; 1365 1366 ufhp = (struct ufid *)fhp; 1367 fs = VFSTOUFS(mp)->um_fs; 1368 if (ufhp->ufid_ino < ROOTINO || 1369 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1370 return (ESTALE); 1371 return (ufs_fhtovp(mp, ufhp, vpp)); 1372 } 1373 1374 /* 1375 * Vnode pointer to File handle 1376 */ 1377 /* ARGSUSED */ 1378 static int 1379 ffs_vptofh(vp, fhp) 1380 struct vnode *vp; 1381 struct fid *fhp; 1382 { 1383 struct inode *ip; 1384 struct ufid *ufhp; 1385 1386 ip = VTOI(vp); 1387 ufhp = (struct ufid *)fhp; 1388 ufhp->ufid_len = sizeof(struct ufid); 1389 ufhp->ufid_ino = ip->i_number; 1390 ufhp->ufid_gen = ip->i_gen; 1391 return (0); 1392 } 1393 1394 /* 1395 * Initialize the filesystem. 1396 */ 1397 static int 1398 ffs_init(vfsp) 1399 struct vfsconf *vfsp; 1400 { 1401 1402 softdep_initialize(); 1403 return (ufs_init(vfsp)); 1404 } 1405 1406 /* 1407 * Undo the work of ffs_init(). 1408 */ 1409 static int 1410 ffs_uninit(vfsp) 1411 struct vfsconf *vfsp; 1412 { 1413 int ret; 1414 1415 ret = ufs_uninit(vfsp); 1416 softdep_uninitialize(); 1417 return (ret); 1418 } 1419 1420 /* 1421 * Write a superblock and associated information back to disk. 1422 */ 1423 static int 1424 ffs_sbupdate(mp, waitfor) 1425 struct ufsmount *mp; 1426 int waitfor; 1427 { 1428 struct fs *fs = mp->um_fs; 1429 struct buf *sbbp; 1430 struct buf *bp; 1431 int blks; 1432 void *space; 1433 int i, size, error, allerror = 0; 1434 1435 if (fs->fs_ronly == 1 && 1436 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1437 (MNT_RDONLY | MNT_UPDATE)) 1438 panic("ffs_sbupdate: write read-only filesystem"); 1439 /* 1440 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1441 */ 1442 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1443 0, 0, 0); 1444 /* 1445 * First write back the summary information. 1446 */ 1447 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1448 space = fs->fs_csp; 1449 for (i = 0; i < blks; i += fs->fs_frag) { 1450 size = fs->fs_bsize; 1451 if (i + fs->fs_frag > blks) 1452 size = (blks - i) * fs->fs_fsize; 1453 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1454 size, 0, 0, 0); 1455 bcopy(space, bp->b_data, (u_int)size); 1456 space = (char *)space + size; 1457 if (waitfor != MNT_WAIT) 1458 bawrite(bp); 1459 else if ((error = bwrite(bp)) != 0) 1460 allerror = error; 1461 } 1462 /* 1463 * Now write back the superblock itself. If any errors occurred 1464 * up to this point, then fail so that the superblock avoids 1465 * being written out as clean. 1466 */ 1467 if (allerror) { 1468 brelse(sbbp); 1469 return (allerror); 1470 } 1471 bp = sbbp; 1472 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1473 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1474 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1475 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1476 fs->fs_sblockloc = SBLOCK_UFS1; 1477 } 1478 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1479 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1480 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1481 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1482 fs->fs_sblockloc = SBLOCK_UFS2; 1483 } 1484 fs->fs_fmod = 0; 1485 fs->fs_time = time_second; 1486 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1487 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1488 if (waitfor != MNT_WAIT) 1489 bawrite(bp); 1490 else if ((error = bwrite(bp)) != 0) 1491 allerror = error; 1492 return (allerror); 1493 } 1494 1495 static int 1496 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1497 int attrnamespace, const char *attrname, struct thread *td) 1498 { 1499 1500 #ifdef UFS_EXTATTR 1501 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1502 attrname, td)); 1503 #else 1504 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1505 attrname, td)); 1506 #endif 1507 } 1508 1509 static void 1510 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1511 { 1512 1513 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1514 uma_zfree(uma_ufs1, ip->i_din1); 1515 else if (ip->i_din2 != NULL) 1516 uma_zfree(uma_ufs2, ip->i_din2); 1517 uma_zfree(uma_inode, ip); 1518 } 1519 1520 static int dobkgrdwrite = 1; 1521 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1522 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1523 1524 /* 1525 * Complete a background write started from bwrite. 1526 */ 1527 static void 1528 ffs_backgroundwritedone(struct buf *bp) 1529 { 1530 struct buf *origbp; 1531 1532 /* 1533 * Find the original buffer that we are writing. 1534 */ 1535 BO_LOCK(bp->b_bufobj); 1536 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1537 panic("backgroundwritedone: lost buffer"); 1538 BO_UNLOCK(bp->b_bufobj); 1539 /* 1540 * Process dependencies then return any unfinished ones. 1541 */ 1542 if (LIST_FIRST(&bp->b_dep) != NULL) 1543 buf_complete(bp); 1544 #ifdef SOFTUPDATES 1545 if (LIST_FIRST(&bp->b_dep) != NULL) 1546 softdep_move_dependencies(bp, origbp); 1547 #endif 1548 1549 /* 1550 * This buffer is marked B_NOCACHE, so when it is released 1551 * by biodone, it will be tossed. We mark it with BIO_READ 1552 * to avoid biodone doing a second bufobj_wdrop. 1553 */ 1554 bp->b_flags |= B_NOCACHE; 1555 bp->b_iocmd = BIO_READ; 1556 bp->b_flags &= ~(B_CACHE | B_DONE); 1557 bp->b_iodone = 0; 1558 bufdone(bp); 1559 BO_LOCK(origbp->b_bufobj); 1560 /* 1561 * Clear the BV_BKGRDINPROG flag in the original buffer 1562 * and awaken it if it is waiting for the write to complete. 1563 * If BV_BKGRDINPROG is not set in the original buffer it must 1564 * have been released and re-instantiated - which is not legal. 1565 */ 1566 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1567 ("backgroundwritedone: lost buffer2")); 1568 origbp->b_vflags &= ~BV_BKGRDINPROG; 1569 if (origbp->b_vflags & BV_BKGRDWAIT) { 1570 origbp->b_vflags &= ~BV_BKGRDWAIT; 1571 wakeup(&origbp->b_xflags); 1572 } 1573 BO_UNLOCK(origbp->b_bufobj); 1574 } 1575 1576 1577 /* 1578 * Write, release buffer on completion. (Done by iodone 1579 * if async). Do not bother writing anything if the buffer 1580 * is invalid. 1581 * 1582 * Note that we set B_CACHE here, indicating that buffer is 1583 * fully valid and thus cacheable. This is true even of NFS 1584 * now so we set it generally. This could be set either here 1585 * or in biodone() since the I/O is synchronous. We put it 1586 * here. 1587 */ 1588 static int 1589 ffs_bufwrite(struct buf *bp) 1590 { 1591 int oldflags, s; 1592 struct buf *newbp; 1593 1594 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1595 if (bp->b_flags & B_INVAL) { 1596 brelse(bp); 1597 return (0); 1598 } 1599 1600 oldflags = bp->b_flags; 1601 1602 if (BUF_REFCNT(bp) == 0) 1603 panic("bufwrite: buffer is not busy???"); 1604 s = splbio(); 1605 /* 1606 * If a background write is already in progress, delay 1607 * writing this block if it is asynchronous. Otherwise 1608 * wait for the background write to complete. 1609 */ 1610 BO_LOCK(bp->b_bufobj); 1611 if (bp->b_vflags & BV_BKGRDINPROG) { 1612 if (bp->b_flags & B_ASYNC) { 1613 BO_UNLOCK(bp->b_bufobj); 1614 splx(s); 1615 bdwrite(bp); 1616 return (0); 1617 } 1618 bp->b_vflags |= BV_BKGRDWAIT; 1619 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1620 if (bp->b_vflags & BV_BKGRDINPROG) 1621 panic("bufwrite: still writing"); 1622 } 1623 BO_UNLOCK(bp->b_bufobj); 1624 1625 /* Mark the buffer clean */ 1626 bundirty(bp); 1627 1628 /* 1629 * If this buffer is marked for background writing and we 1630 * do not have to wait for it, make a copy and write the 1631 * copy so as to leave this buffer ready for further use. 1632 * 1633 * This optimization eats a lot of memory. If we have a page 1634 * or buffer shortfall we can't do it. 1635 */ 1636 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1637 (bp->b_flags & B_ASYNC) && 1638 !vm_page_count_severe() && 1639 !buf_dirty_count_severe()) { 1640 KASSERT(bp->b_iodone == NULL, 1641 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1642 1643 /* get a new block */ 1644 newbp = geteblk(bp->b_bufsize); 1645 1646 /* 1647 * set it to be identical to the old block. We have to 1648 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1649 * to avoid confusing the splay tree and gbincore(). 1650 */ 1651 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1652 newbp->b_lblkno = bp->b_lblkno; 1653 newbp->b_xflags |= BX_BKGRDMARKER; 1654 BO_LOCK(bp->b_bufobj); 1655 bp->b_vflags |= BV_BKGRDINPROG; 1656 bgetvp(bp->b_vp, newbp); 1657 BO_UNLOCK(bp->b_bufobj); 1658 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1659 newbp->b_blkno = bp->b_blkno; 1660 newbp->b_offset = bp->b_offset; 1661 newbp->b_iodone = ffs_backgroundwritedone; 1662 newbp->b_flags |= B_ASYNC; 1663 newbp->b_flags &= ~B_INVAL; 1664 1665 #ifdef SOFTUPDATES 1666 /* move over the dependencies */ 1667 if (LIST_FIRST(&bp->b_dep) != NULL) 1668 softdep_move_dependencies(bp, newbp); 1669 #endif 1670 1671 /* 1672 * Initiate write on the copy, release the original to 1673 * the B_LOCKED queue so that it cannot go away until 1674 * the background write completes. If not locked it could go 1675 * away and then be reconstituted while it was being written. 1676 * If the reconstituted buffer were written, we could end up 1677 * with two background copies being written at the same time. 1678 */ 1679 bqrelse(bp); 1680 bp = newbp; 1681 } 1682 1683 /* Let the normal bufwrite do the rest for us */ 1684 bufwrite(bp); 1685 1686 return (0); 1687 } 1688 1689 1690 static void 1691 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1692 { 1693 1694 #ifdef SOFTUPDATES 1695 if (bp->b_iocmd == BIO_WRITE && softdep_disk_prewrite(bp)) 1696 return; 1697 #endif 1698 g_vfs_strategy(bo, bp); 1699 } 1700