ffs_vfsops.c revision 143666
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: head/sys/ufs/ffs/ffs_vfsops.c 143666 2005-03-15 20:50:58Z phk $"); 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 71static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 72 73static int ffs_sbupdate(struct ufsmount *, int); 74static int ffs_reload(struct mount *, struct thread *); 75static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 76static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 77 ufs2_daddr_t); 78static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 79static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 80static vfs_init_t ffs_init; 81static vfs_uninit_t ffs_uninit; 82static vfs_extattrctl_t ffs_extattrctl; 83static vfs_cmount_t ffs_cmount; 84static vfs_unmount_t ffs_unmount; 85static vfs_mount_t ffs_mount; 86static vfs_statfs_t ffs_statfs; 87static vfs_fhtovp_t ffs_fhtovp; 88static vfs_vptofh_t ffs_vptofh; 89static vfs_sync_t ffs_sync; 90 91static 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 107VFS_SET(ufs_vfsops, ufs, 0); 108 109static b_strategy_t ffs_geom_strategy; 110static b_write_t ffs_bufwrite; 111 112static 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 119static const char *ffs_opts[] = { "from", "export", NULL }; 120 121static int 122ffs_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 370static int 371ffs_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 */ 402static int 403ffs_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 494loop: 495 MNT_ILOCK(mp); 496 MNT_VNODE_FOREACH(vp, mp, nvp) { 497 VI_LOCK(vp); 498 if (vp->v_iflag & VI_DOOMED) { 499 VI_UNLOCK(vp); 500 continue; 501 } 502 MNT_IUNLOCK(mp); 503 /* 504 * Step 4: invalidate all cached file data. 505 */ 506 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 507 goto loop; 508 } 509 if (vinvalbuf(vp, 0, td, 0, 0)) 510 panic("ffs_reload: dirty2"); 511 /* 512 * Step 5: re-read inode data for all active vnodes. 513 */ 514 ip = VTOI(vp); 515 error = 516 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 517 (int)fs->fs_bsize, NOCRED, &bp); 518 if (error) { 519 VOP_UNLOCK(vp, 0, td); 520 vrele(vp); 521 return (error); 522 } 523 ffs_load_inode(bp, ip, fs, ip->i_number); 524 ip->i_effnlink = ip->i_nlink; 525 brelse(bp); 526 VOP_UNLOCK(vp, 0, td); 527 vrele(vp); 528 MNT_ILOCK(mp); 529 } 530 MNT_IUNLOCK(mp); 531 return (0); 532} 533 534/* 535 * Possible superblock locations ordered from most to least likely. 536 */ 537static int sblock_try[] = SBLOCKSEARCH; 538 539/* 540 * Common code for mount and mountroot 541 */ 542static int 543ffs_mountfs(devvp, mp, td) 544 struct vnode *devvp; 545 struct mount *mp; 546 struct thread *td; 547{ 548 struct ufsmount *ump; 549 struct buf *bp; 550 struct fs *fs; 551 struct cdev *dev; 552 void *space; 553 ufs2_daddr_t sblockloc; 554 int error, i, blks, size, ronly; 555 int32_t *lp; 556 struct ucred *cred; 557 struct g_consumer *cp; 558 559 dev = devvp->v_rdev; 560 cred = td ? td->td_ucred : NOCRED; 561 562 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 563 DROP_GIANT(); 564 g_topology_lock(); 565 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 566 567 /* 568 * If we are a root mount, drop the E flag so fsck can do its magic. 569 * We will pick it up again when we remount R/W. 570 */ 571 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 572 error = g_access(cp, 0, 0, -1); 573 g_topology_unlock(); 574 PICKUP_GIANT(); 575 VOP_UNLOCK(devvp, 0, td); 576 if (error) 577 return (error); 578 if (devvp->v_rdev->si_iosize_max != 0) 579 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 580 if (mp->mnt_iosize_max > MAXPHYS) 581 mp->mnt_iosize_max = MAXPHYS; 582 583 devvp->v_bufobj.bo_private = cp; 584 devvp->v_bufobj.bo_ops = &ffs_ops; 585 586 bp = NULL; 587 ump = NULL; 588 fs = NULL; 589 sblockloc = 0; 590 /* 591 * Try reading the superblock in each of its possible locations. 592 */ 593 for (i = 0; sblock_try[i] != -1; i++) { 594 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 595 cred, &bp)) != 0) 596 goto out; 597 fs = (struct fs *)bp->b_data; 598 sblockloc = sblock_try[i]; 599 if ((fs->fs_magic == FS_UFS1_MAGIC || 600 (fs->fs_magic == FS_UFS2_MAGIC && 601 (fs->fs_sblockloc == sblockloc || 602 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 603 fs->fs_bsize <= MAXBSIZE && 604 fs->fs_bsize >= sizeof(struct fs)) 605 break; 606 brelse(bp); 607 bp = NULL; 608 } 609 if (sblock_try[i] == -1) { 610 error = EINVAL; /* XXX needs translation */ 611 goto out; 612 } 613 fs->fs_fmod = 0; 614 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 615 fs->fs_flags &= ~FS_UNCLEAN; 616 if (fs->fs_clean == 0) { 617 fs->fs_flags |= FS_UNCLEAN; 618 if (ronly || (mp->mnt_flag & MNT_FORCE) || 619 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 620 (fs->fs_flags & FS_DOSOFTDEP))) { 621 printf( 622"WARNING: %s was not properly dismounted\n", 623 fs->fs_fsmnt); 624 } else { 625 printf( 626"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 627 fs->fs_fsmnt); 628 error = EPERM; 629 goto out; 630 } 631 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 632 (mp->mnt_flag & MNT_FORCE)) { 633 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 634 (intmax_t)fs->fs_pendingblocks, 635 fs->fs_pendinginodes); 636 fs->fs_pendingblocks = 0; 637 fs->fs_pendinginodes = 0; 638 } 639 } 640 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 641 printf("%s: mount pending error: blocks %jd files %d\n", 642 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 643 fs->fs_pendinginodes); 644 fs->fs_pendingblocks = 0; 645 fs->fs_pendinginodes = 0; 646 } 647 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 648 ump->um_cp = cp; 649 ump->um_bo = &devvp->v_bufobj; 650 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 651 if (fs->fs_magic == FS_UFS1_MAGIC) { 652 ump->um_fstype = UFS1; 653 ump->um_balloc = ffs_balloc_ufs1; 654 } else { 655 ump->um_fstype = UFS2; 656 ump->um_balloc = ffs_balloc_ufs2; 657 } 658 ump->um_blkatoff = ffs_blkatoff; 659 ump->um_truncate = ffs_truncate; 660 ump->um_update = ffs_update; 661 ump->um_valloc = ffs_valloc; 662 ump->um_vfree = ffs_vfree; 663 ump->um_ifree = ffs_ifree; 664 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 665 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 666 if (fs->fs_sbsize < SBLOCKSIZE) 667 bp->b_flags |= B_INVAL | B_NOCACHE; 668 brelse(bp); 669 bp = NULL; 670 fs = ump->um_fs; 671 ffs_oldfscompat_read(fs, ump, sblockloc); 672 fs->fs_ronly = ronly; 673 size = fs->fs_cssize; 674 blks = howmany(size, fs->fs_fsize); 675 if (fs->fs_contigsumsize > 0) 676 size += fs->fs_ncg * sizeof(int32_t); 677 size += fs->fs_ncg * sizeof(u_int8_t); 678 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 679 fs->fs_csp = space; 680 for (i = 0; i < blks; i += fs->fs_frag) { 681 size = fs->fs_bsize; 682 if (i + fs->fs_frag > blks) 683 size = (blks - i) * fs->fs_fsize; 684 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 685 cred, &bp)) != 0) { 686 free(fs->fs_csp, M_UFSMNT); 687 goto out; 688 } 689 bcopy(bp->b_data, space, (u_int)size); 690 space = (char *)space + size; 691 brelse(bp); 692 bp = NULL; 693 } 694 if (fs->fs_contigsumsize > 0) { 695 fs->fs_maxcluster = lp = space; 696 for (i = 0; i < fs->fs_ncg; i++) 697 *lp++ = fs->fs_contigsumsize; 698 space = lp; 699 } 700 size = fs->fs_ncg * sizeof(u_int8_t); 701 fs->fs_contigdirs = (u_int8_t *)space; 702 bzero(fs->fs_contigdirs, size); 703 fs->fs_active = NULL; 704 mp->mnt_data = (qaddr_t)ump; 705 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 706 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 707 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 708 vfs_getvfs(&mp->mnt_stat.f_fsid)) 709 vfs_getnewfsid(mp); 710 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 711 mp->mnt_flag |= MNT_LOCAL; 712 if ((fs->fs_flags & FS_MULTILABEL) != 0) 713#ifdef MAC 714 mp->mnt_flag |= MNT_MULTILABEL; 715#else 716 printf( 717"WARNING: %s: multilabel flag on fs but no MAC support\n", 718 fs->fs_fsmnt); 719#endif 720 if ((fs->fs_flags & FS_ACLS) != 0) 721#ifdef UFS_ACL 722 mp->mnt_flag |= MNT_ACLS; 723#else 724 printf( 725"WARNING: %s: ACLs flag on fs but no ACLs support\n", 726 fs->fs_fsmnt); 727#endif 728 ump->um_mountp = mp; 729 ump->um_dev = dev; 730 ump->um_devvp = devvp; 731 ump->um_nindir = fs->fs_nindir; 732 ump->um_bptrtodb = fs->fs_fsbtodb; 733 ump->um_seqinc = fs->fs_frag; 734 for (i = 0; i < MAXQUOTAS; i++) 735 ump->um_quotas[i] = NULLVP; 736#ifdef UFS_EXTATTR 737 ufs_extattr_uepm_init(&ump->um_extattr); 738#endif 739 /* 740 * Set FS local "last mounted on" information (NULL pad) 741 */ 742 vfs_mountedfrom(mp, fs->fs_fsmnt); 743 744 if( mp->mnt_flag & MNT_ROOTFS) { 745 /* 746 * Root mount; update timestamp in mount structure. 747 * this will be used by the common root mount code 748 * to update the system clock. 749 */ 750 mp->mnt_time = fs->fs_time; 751 } 752 753 if (ronly == 0) { 754 if ((fs->fs_flags & FS_DOSOFTDEP) && 755 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 756 free(fs->fs_csp, M_UFSMNT); 757 goto out; 758 } 759 if (fs->fs_snapinum[0] != 0) 760 ffs_snapshot_mount(mp); 761 fs->fs_fmod = 1; 762 fs->fs_clean = 0; 763 (void) ffs_sbupdate(ump, MNT_WAIT); 764 } 765 /* 766 * Initialize filesystem stat information in mount struct. 767 */ 768#ifdef UFS_EXTATTR 769#ifdef UFS_EXTATTR_AUTOSTART 770 /* 771 * 772 * Auto-starting does the following: 773 * - check for /.attribute in the fs, and extattr_start if so 774 * - for each file in .attribute, enable that file with 775 * an attribute of the same name. 776 * Not clear how to report errors -- probably eat them. 777 * This would all happen while the filesystem was busy/not 778 * available, so would effectively be "atomic". 779 */ 780 (void) ufs_extattr_autostart(mp, td); 781#endif /* !UFS_EXTATTR_AUTOSTART */ 782#endif /* !UFS_EXTATTR */ 783#ifndef QUOTA 784 mp->mnt_kern_flag |= MNTK_MPSAFE; 785#endif 786 return (0); 787out: 788 if (bp) 789 brelse(bp); 790 if (cp != NULL) { 791 DROP_GIANT(); 792 g_topology_lock(); 793 g_vfs_close(cp, td); 794 g_topology_unlock(); 795 PICKUP_GIANT(); 796 } 797 if (ump) { 798 mtx_destroy(UFS_MTX(ump)); 799 free(ump->um_fs, M_UFSMNT); 800 free(ump, M_UFSMNT); 801 mp->mnt_data = (qaddr_t)0; 802 } 803 return (error); 804} 805 806#include <sys/sysctl.h> 807static int bigcgs = 0; 808SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 809 810/* 811 * Sanity checks for loading old filesystem superblocks. 812 * See ffs_oldfscompat_write below for unwound actions. 813 * 814 * XXX - Parts get retired eventually. 815 * Unfortunately new bits get added. 816 */ 817static void 818ffs_oldfscompat_read(fs, ump, sblockloc) 819 struct fs *fs; 820 struct ufsmount *ump; 821 ufs2_daddr_t sblockloc; 822{ 823 off_t maxfilesize; 824 825 /* 826 * If not yet done, update fs_flags location and value of fs_sblockloc. 827 */ 828 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 829 fs->fs_flags = fs->fs_old_flags; 830 fs->fs_old_flags |= FS_FLAGS_UPDATED; 831 fs->fs_sblockloc = sblockloc; 832 } 833 /* 834 * If not yet done, update UFS1 superblock with new wider fields. 835 */ 836 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 837 fs->fs_maxbsize = fs->fs_bsize; 838 fs->fs_time = fs->fs_old_time; 839 fs->fs_size = fs->fs_old_size; 840 fs->fs_dsize = fs->fs_old_dsize; 841 fs->fs_csaddr = fs->fs_old_csaddr; 842 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 843 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 844 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 845 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 846 } 847 if (fs->fs_magic == FS_UFS1_MAGIC && 848 fs->fs_old_inodefmt < FS_44INODEFMT) { 849 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 850 fs->fs_qbmask = ~fs->fs_bmask; 851 fs->fs_qfmask = ~fs->fs_fmask; 852 } 853 if (fs->fs_magic == FS_UFS1_MAGIC) { 854 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 855 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 856 if (fs->fs_maxfilesize > maxfilesize) 857 fs->fs_maxfilesize = maxfilesize; 858 } 859 /* Compatibility for old filesystems */ 860 if (fs->fs_avgfilesize <= 0) 861 fs->fs_avgfilesize = AVFILESIZ; 862 if (fs->fs_avgfpdir <= 0) 863 fs->fs_avgfpdir = AFPDIR; 864 if (bigcgs) { 865 fs->fs_save_cgsize = fs->fs_cgsize; 866 fs->fs_cgsize = fs->fs_bsize; 867 } 868} 869 870/* 871 * Unwinding superblock updates for old filesystems. 872 * See ffs_oldfscompat_read above for details. 873 * 874 * XXX - Parts get retired eventually. 875 * Unfortunately new bits get added. 876 */ 877static void 878ffs_oldfscompat_write(fs, ump) 879 struct fs *fs; 880 struct ufsmount *ump; 881{ 882 883 /* 884 * Copy back UFS2 updated fields that UFS1 inspects. 885 */ 886 if (fs->fs_magic == FS_UFS1_MAGIC) { 887 fs->fs_old_time = fs->fs_time; 888 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 889 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 890 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 891 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 892 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 893 } 894 if (bigcgs) { 895 fs->fs_cgsize = fs->fs_save_cgsize; 896 fs->fs_save_cgsize = 0; 897 } 898} 899 900/* 901 * unmount system call 902 */ 903static int 904ffs_unmount(mp, mntflags, td) 905 struct mount *mp; 906 int mntflags; 907 struct thread *td; 908{ 909 struct ufsmount *ump = VFSTOUFS(mp); 910 struct fs *fs; 911 int error, flags; 912 913 flags = 0; 914 if (mntflags & MNT_FORCE) { 915 flags |= FORCECLOSE; 916 } 917#ifdef UFS_EXTATTR 918 if ((error = ufs_extattr_stop(mp, td))) { 919 if (error != EOPNOTSUPP) 920 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 921 error); 922 } else { 923 ufs_extattr_uepm_destroy(&ump->um_extattr); 924 } 925#endif 926 if (mp->mnt_flag & MNT_SOFTDEP) { 927 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 928 return (error); 929 } else { 930 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 931 return (error); 932 } 933 fs = ump->um_fs; 934 UFS_LOCK(ump); 935 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 936 printf("%s: unmount pending error: blocks %jd files %d\n", 937 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 938 fs->fs_pendinginodes); 939 fs->fs_pendingblocks = 0; 940 fs->fs_pendinginodes = 0; 941 } 942 UFS_UNLOCK(ump); 943 if (fs->fs_ronly == 0) { 944 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 945 error = ffs_sbupdate(ump, MNT_WAIT); 946 if (error) { 947 fs->fs_clean = 0; 948 return (error); 949 } 950 } 951 DROP_GIANT(); 952 g_topology_lock(); 953 g_vfs_close(ump->um_cp, td); 954 g_topology_unlock(); 955 PICKUP_GIANT(); 956 vrele(ump->um_devvp); 957 mtx_destroy(UFS_MTX(ump)); 958 free(fs->fs_csp, M_UFSMNT); 959 free(fs, M_UFSMNT); 960 free(ump, M_UFSMNT); 961 mp->mnt_data = (qaddr_t)0; 962 mp->mnt_flag &= ~MNT_LOCAL; 963 return (error); 964} 965 966/* 967 * Flush out all the files in a filesystem. 968 */ 969int 970ffs_flushfiles(mp, flags, td) 971 struct mount *mp; 972 int flags; 973 struct thread *td; 974{ 975 struct ufsmount *ump; 976 int error; 977 978 ump = VFSTOUFS(mp); 979#ifdef QUOTA 980 if (mp->mnt_flag & MNT_QUOTA) { 981 int i; 982 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 983 if (error) 984 return (error); 985 for (i = 0; i < MAXQUOTAS; i++) { 986 if (ump->um_quotas[i] == NULLVP) 987 continue; 988 quotaoff(td, mp, i); 989 } 990 /* 991 * Here we fall through to vflush again to ensure 992 * that we have gotten rid of all the system vnodes. 993 */ 994 } 995#endif 996 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 997 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 998 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 999 return (error); 1000 ffs_snapshot_unmount(mp); 1001 /* 1002 * Here we fall through to vflush again to ensure 1003 * that we have gotten rid of all the system vnodes. 1004 */ 1005 } 1006 /* 1007 * Flush all the files. 1008 */ 1009 if ((error = vflush(mp, 0, flags, td)) != 0) 1010 return (error); 1011 /* 1012 * Flush filesystem metadata. 1013 */ 1014 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1015 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1016 VOP_UNLOCK(ump->um_devvp, 0, td); 1017 return (error); 1018} 1019 1020/* 1021 * Get filesystem statistics. 1022 */ 1023static int 1024ffs_statfs(mp, sbp, td) 1025 struct mount *mp; 1026 struct statfs *sbp; 1027 struct thread *td; 1028{ 1029 struct ufsmount *ump; 1030 struct fs *fs; 1031 1032 ump = VFSTOUFS(mp); 1033 fs = ump->um_fs; 1034 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1035 panic("ffs_statfs"); 1036 sbp->f_version = STATFS_VERSION; 1037 sbp->f_bsize = fs->fs_fsize; 1038 sbp->f_iosize = fs->fs_bsize; 1039 sbp->f_blocks = fs->fs_dsize; 1040 UFS_LOCK(ump); 1041 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1042 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1043 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1044 dbtofsb(fs, fs->fs_pendingblocks); 1045 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1046 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1047 UFS_UNLOCK(ump); 1048 sbp->f_namemax = NAME_MAX; 1049 return (0); 1050} 1051 1052/* 1053 * Go through the disk queues to initiate sandbagged IO; 1054 * go through the inodes to write those that have been modified; 1055 * initiate the writing of the super block if it has been modified. 1056 * 1057 * Note: we are always called with the filesystem marked `MPBUSY'. 1058 */ 1059static int 1060ffs_sync(mp, waitfor, td) 1061 struct mount *mp; 1062 int waitfor; 1063 struct thread *td; 1064{ 1065 struct vnode *nvp, *vp, *devvp; 1066 struct inode *ip; 1067 struct ufsmount *ump = VFSTOUFS(mp); 1068 struct fs *fs; 1069 int error, count, wait, lockreq, allerror = 0; 1070 struct bufobj *bo; 1071 1072 fs = ump->um_fs; 1073 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1074 printf("fs = %s\n", fs->fs_fsmnt); 1075 panic("ffs_sync: rofs mod"); 1076 } 1077 /* 1078 * Write back each (modified) inode. 1079 */ 1080 wait = 0; 1081 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1082 if (waitfor == MNT_WAIT) { 1083 wait = 1; 1084 lockreq = LK_EXCLUSIVE; 1085 } 1086 lockreq |= LK_INTERLOCK; 1087 MNT_ILOCK(mp); 1088loop: 1089 MNT_VNODE_FOREACH(vp, mp, nvp) { 1090 /* 1091 * Depend on the mntvnode_slock to keep things stable enough 1092 * for a quick test. Since there might be hundreds of 1093 * thousands of vnodes, we cannot afford even a subroutine 1094 * call unless there's a good chance that we have work to do. 1095 */ 1096 VI_LOCK(vp); 1097 if (vp->v_iflag & VI_DOOMED) { 1098 VI_UNLOCK(vp); 1099 continue; 1100 } 1101 ip = VTOI(vp); 1102 if (vp->v_type == VNON || ((ip->i_flag & 1103 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1104 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1105 VI_UNLOCK(vp); 1106 continue; 1107 } 1108 MNT_IUNLOCK(mp); 1109 if ((error = vget(vp, lockreq, td)) != 0) { 1110 MNT_ILOCK(mp); 1111 if (error == ENOENT) 1112 goto loop; 1113 continue; 1114 } 1115 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1116 allerror = error; 1117 VOP_UNLOCK(vp, 0, td); 1118 vrele(vp); 1119 MNT_ILOCK(mp); 1120 } 1121 MNT_IUNLOCK(mp); 1122 /* 1123 * Force stale filesystem control information to be flushed. 1124 */ 1125 if (waitfor == MNT_WAIT) { 1126 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1127 allerror = error; 1128 /* Flushed work items may create new vnodes to clean */ 1129 if (allerror == 0 && count) { 1130 MNT_ILOCK(mp); 1131 goto loop; 1132 } 1133 } 1134#ifdef QUOTA 1135 qsync(mp); 1136#endif 1137 devvp = ump->um_devvp; 1138 VI_LOCK(devvp); 1139 bo = &devvp->v_bufobj; 1140 if (waitfor != MNT_LAZY && 1141 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1142 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1143 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1144 allerror = error; 1145 VOP_UNLOCK(devvp, 0, td); 1146 if (allerror == 0 && waitfor == MNT_WAIT) { 1147 MNT_ILOCK(mp); 1148 goto loop; 1149 } 1150 } else 1151 VI_UNLOCK(devvp); 1152 /* 1153 * Write back modified superblock. 1154 */ 1155 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1156 allerror = error; 1157 return (allerror); 1158} 1159 1160int 1161ffs_vget(mp, ino, flags, vpp) 1162 struct mount *mp; 1163 ino_t ino; 1164 int flags; 1165 struct vnode **vpp; 1166{ 1167 struct fs *fs; 1168 struct inode *ip; 1169 struct ufsmount *ump; 1170 struct buf *bp; 1171 struct vnode *vp; 1172 struct cdev *dev; 1173 int error; 1174 1175 error = vfs_hash_get(mp, ino, flags, curthread, vpp); 1176 if (error || *vpp != NULL) 1177 return (error); 1178 1179 /* 1180 * We do not lock vnode creation as it is believed to be too 1181 * expensive for such rare case as simultaneous creation of vnode 1182 * for same ino by different processes. We just allow them to race 1183 * and check later to decide who wins. Let the race begin! 1184 */ 1185 1186 ump = VFSTOUFS(mp); 1187 dev = ump->um_dev; 1188 fs = ump->um_fs; 1189 1190 /* 1191 * If this MALLOC() is performed after the getnewvnode() 1192 * it might block, leaving a vnode with a NULL v_data to be 1193 * found by ffs_sync() if a sync happens to fire right then, 1194 * which will cause a panic because ffs_sync() blindly 1195 * dereferences vp->v_data (as well it should). 1196 */ 1197 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1198 1199 /* Allocate a new vnode/inode. */ 1200 if (fs->fs_magic == FS_UFS1_MAGIC) 1201 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1202 else 1203 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1204 if (error) { 1205 *vpp = NULL; 1206 uma_zfree(uma_inode, ip); 1207 return (error); 1208 } 1209 /* 1210 * FFS supports recursive locking. 1211 */ 1212 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1213 vp->v_data = ip; 1214 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1215 ip->i_vnode = vp; 1216 ip->i_ump = ump; 1217 ip->i_fs = fs; 1218 ip->i_dev = dev; 1219 ip->i_number = ino; 1220#ifdef QUOTA 1221 { 1222 int i; 1223 for (i = 0; i < MAXQUOTAS; i++) 1224 ip->i_dquot[i] = NODQUOT; 1225 } 1226#endif 1227 1228 error = vfs_hash_insert(vp, ino, flags, curthread, vpp); 1229 if (error || *vpp != NULL) 1230 return (error); 1231 1232 /* Read in the disk contents for the inode, copy into the inode. */ 1233 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1234 (int)fs->fs_bsize, NOCRED, &bp); 1235 if (error) { 1236 /* 1237 * The inode does not contain anything useful, so it would 1238 * be misleading to leave it on its hash chain. With mode 1239 * still zero, it will be unlinked and returned to the free 1240 * list by vput(). 1241 */ 1242 brelse(bp); 1243 vput(vp); 1244 *vpp = NULL; 1245 return (error); 1246 } 1247 if (ip->i_ump->um_fstype == UFS1) 1248 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1249 else 1250 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1251 ffs_load_inode(bp, ip, fs, ino); 1252 if (DOINGSOFTDEP(vp)) 1253 softdep_load_inodeblock(ip); 1254 else 1255 ip->i_effnlink = ip->i_nlink; 1256 bqrelse(bp); 1257 1258 /* 1259 * Initialize the vnode from the inode, check for aliases. 1260 * Note that the underlying vnode may have changed. 1261 */ 1262 if (ip->i_ump->um_fstype == UFS1) 1263 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1264 else 1265 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1266 if (error) { 1267 vput(vp); 1268 *vpp = NULL; 1269 return (error); 1270 } 1271 1272 /* 1273 * Finish inode initialization. 1274 */ 1275 1276 /* 1277 * Set up a generation number for this inode if it does not 1278 * already have one. This should only happen on old filesystems. 1279 */ 1280 if (ip->i_gen == 0) { 1281 ip->i_gen = arc4random() / 2 + 1; 1282 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1283 ip->i_flag |= IN_MODIFIED; 1284 DIP_SET(ip, i_gen, ip->i_gen); 1285 } 1286 } 1287 /* 1288 * Ensure that uid and gid are correct. This is a temporary 1289 * fix until fsck has been changed to do the update. 1290 */ 1291 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1292 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1293 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1294 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1295 } /* XXX */ 1296 1297#ifdef MAC 1298 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1299 /* 1300 * If this vnode is already allocated, and we're running 1301 * multi-label, attempt to perform a label association 1302 * from the extended attributes on the inode. 1303 */ 1304 error = mac_associate_vnode_extattr(mp, vp); 1305 if (error) { 1306 /* ufs_inactive will release ip->i_devvp ref. */ 1307 vput(vp); 1308 *vpp = NULL; 1309 return (error); 1310 } 1311 } 1312#endif 1313 1314 *vpp = vp; 1315 return (0); 1316} 1317 1318/* 1319 * File handle to vnode 1320 * 1321 * Have to be really careful about stale file handles: 1322 * - check that the inode number is valid 1323 * - call ffs_vget() to get the locked inode 1324 * - check for an unallocated inode (i_mode == 0) 1325 * - check that the given client host has export rights and return 1326 * those rights via. exflagsp and credanonp 1327 */ 1328static int 1329ffs_fhtovp(mp, fhp, vpp) 1330 struct mount *mp; 1331 struct fid *fhp; 1332 struct vnode **vpp; 1333{ 1334 struct ufid *ufhp; 1335 struct fs *fs; 1336 1337 ufhp = (struct ufid *)fhp; 1338 fs = VFSTOUFS(mp)->um_fs; 1339 if (ufhp->ufid_ino < ROOTINO || 1340 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1341 return (ESTALE); 1342 return (ufs_fhtovp(mp, ufhp, vpp)); 1343} 1344 1345/* 1346 * Vnode pointer to File handle 1347 */ 1348/* ARGSUSED */ 1349static int 1350ffs_vptofh(vp, fhp) 1351 struct vnode *vp; 1352 struct fid *fhp; 1353{ 1354 struct inode *ip; 1355 struct ufid *ufhp; 1356 1357 ip = VTOI(vp); 1358 ufhp = (struct ufid *)fhp; 1359 ufhp->ufid_len = sizeof(struct ufid); 1360 ufhp->ufid_ino = ip->i_number; 1361 ufhp->ufid_gen = ip->i_gen; 1362 return (0); 1363} 1364 1365/* 1366 * Initialize the filesystem. 1367 */ 1368static int 1369ffs_init(vfsp) 1370 struct vfsconf *vfsp; 1371{ 1372 1373 softdep_initialize(); 1374 return (ufs_init(vfsp)); 1375} 1376 1377/* 1378 * Undo the work of ffs_init(). 1379 */ 1380static int 1381ffs_uninit(vfsp) 1382 struct vfsconf *vfsp; 1383{ 1384 int ret; 1385 1386 ret = ufs_uninit(vfsp); 1387 softdep_uninitialize(); 1388 return (ret); 1389} 1390 1391/* 1392 * Write a superblock and associated information back to disk. 1393 */ 1394static int 1395ffs_sbupdate(mp, waitfor) 1396 struct ufsmount *mp; 1397 int waitfor; 1398{ 1399 struct fs *fs = mp->um_fs; 1400 struct buf *sbbp; 1401 struct buf *bp; 1402 int blks; 1403 void *space; 1404 int i, size, error, allerror = 0; 1405 1406 if (fs->fs_ronly == 1 && 1407 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1408 (MNT_RDONLY | MNT_UPDATE)) 1409 panic("ffs_sbupdate: write read-only filesystem"); 1410 /* 1411 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1412 */ 1413 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1414 0, 0, 0); 1415 /* 1416 * First write back the summary information. 1417 */ 1418 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1419 space = fs->fs_csp; 1420 for (i = 0; i < blks; i += fs->fs_frag) { 1421 size = fs->fs_bsize; 1422 if (i + fs->fs_frag > blks) 1423 size = (blks - i) * fs->fs_fsize; 1424 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1425 size, 0, 0, 0); 1426 bcopy(space, bp->b_data, (u_int)size); 1427 space = (char *)space + size; 1428 if (waitfor != MNT_WAIT) 1429 bawrite(bp); 1430 else if ((error = bwrite(bp)) != 0) 1431 allerror = error; 1432 } 1433 /* 1434 * Now write back the superblock itself. If any errors occurred 1435 * up to this point, then fail so that the superblock avoids 1436 * being written out as clean. 1437 */ 1438 if (allerror) { 1439 brelse(sbbp); 1440 return (allerror); 1441 } 1442 bp = sbbp; 1443 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1444 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1445 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1446 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1447 fs->fs_sblockloc = SBLOCK_UFS1; 1448 } 1449 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1450 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1451 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1452 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1453 fs->fs_sblockloc = SBLOCK_UFS2; 1454 } 1455 fs->fs_fmod = 0; 1456 fs->fs_time = time_second; 1457 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1458 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1459 if (waitfor != MNT_WAIT) 1460 bawrite(bp); 1461 else if ((error = bwrite(bp)) != 0) 1462 allerror = error; 1463 return (allerror); 1464} 1465 1466static int 1467ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1468 int attrnamespace, const char *attrname, struct thread *td) 1469{ 1470 1471#ifdef UFS_EXTATTR 1472 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1473 attrname, td)); 1474#else 1475 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1476 attrname, td)); 1477#endif 1478} 1479 1480static void 1481ffs_ifree(struct ufsmount *ump, struct inode *ip) 1482{ 1483 1484 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1485 uma_zfree(uma_ufs1, ip->i_din1); 1486 else if (ip->i_din2 != NULL) 1487 uma_zfree(uma_ufs2, ip->i_din2); 1488 uma_zfree(uma_inode, ip); 1489} 1490 1491static int dobkgrdwrite = 1; 1492SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1493 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1494 1495/* 1496 * Complete a background write started from bwrite. 1497 */ 1498static void 1499ffs_backgroundwritedone(struct buf *bp) 1500{ 1501 struct buf *origbp; 1502 1503 /* 1504 * Find the original buffer that we are writing. 1505 */ 1506 BO_LOCK(bp->b_bufobj); 1507 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1508 panic("backgroundwritedone: lost buffer"); 1509 BO_UNLOCK(bp->b_bufobj); 1510 /* 1511 * Process dependencies then return any unfinished ones. 1512 */ 1513 if (LIST_FIRST(&bp->b_dep) != NULL) 1514 buf_complete(bp); 1515#ifdef SOFTUPDATES 1516 if (LIST_FIRST(&bp->b_dep) != NULL) 1517 softdep_move_dependencies(bp, origbp); 1518#endif 1519 1520 /* 1521 * This buffer is marked B_NOCACHE, so when it is released 1522 * by biodone, it will be tossed. We mark it with BIO_READ 1523 * to avoid biodone doing a second bufobj_wdrop. 1524 */ 1525 bp->b_flags |= B_NOCACHE; 1526 bp->b_iocmd = BIO_READ; 1527 bp->b_flags &= ~(B_CACHE | B_DONE); 1528 bp->b_iodone = 0; 1529 bufdone(bp); 1530 BO_LOCK(origbp->b_bufobj); 1531 /* 1532 * Clear the BV_BKGRDINPROG flag in the original buffer 1533 * and awaken it if it is waiting for the write to complete. 1534 * If BV_BKGRDINPROG is not set in the original buffer it must 1535 * have been released and re-instantiated - which is not legal. 1536 */ 1537 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1538 ("backgroundwritedone: lost buffer2")); 1539 origbp->b_vflags &= ~BV_BKGRDINPROG; 1540 if (origbp->b_vflags & BV_BKGRDWAIT) { 1541 origbp->b_vflags &= ~BV_BKGRDWAIT; 1542 wakeup(&origbp->b_xflags); 1543 } 1544 BO_UNLOCK(origbp->b_bufobj); 1545} 1546 1547 1548/* 1549 * Write, release buffer on completion. (Done by iodone 1550 * if async). Do not bother writing anything if the buffer 1551 * is invalid. 1552 * 1553 * Note that we set B_CACHE here, indicating that buffer is 1554 * fully valid and thus cacheable. This is true even of NFS 1555 * now so we set it generally. This could be set either here 1556 * or in biodone() since the I/O is synchronous. We put it 1557 * here. 1558 */ 1559static int 1560ffs_bufwrite(struct buf *bp) 1561{ 1562 int oldflags, s; 1563 struct buf *newbp; 1564 1565 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1566 if (bp->b_flags & B_INVAL) { 1567 brelse(bp); 1568 return (0); 1569 } 1570 1571 oldflags = bp->b_flags; 1572 1573 if (BUF_REFCNT(bp) == 0) 1574 panic("bufwrite: buffer is not busy???"); 1575 s = splbio(); 1576 /* 1577 * If a background write is already in progress, delay 1578 * writing this block if it is asynchronous. Otherwise 1579 * wait for the background write to complete. 1580 */ 1581 BO_LOCK(bp->b_bufobj); 1582 if (bp->b_vflags & BV_BKGRDINPROG) { 1583 if (bp->b_flags & B_ASYNC) { 1584 BO_UNLOCK(bp->b_bufobj); 1585 splx(s); 1586 bdwrite(bp); 1587 return (0); 1588 } 1589 bp->b_vflags |= BV_BKGRDWAIT; 1590 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1591 if (bp->b_vflags & BV_BKGRDINPROG) 1592 panic("bufwrite: still writing"); 1593 } 1594 BO_UNLOCK(bp->b_bufobj); 1595 1596 /* Mark the buffer clean */ 1597 bundirty(bp); 1598 1599 /* 1600 * If this buffer is marked for background writing and we 1601 * do not have to wait for it, make a copy and write the 1602 * copy so as to leave this buffer ready for further use. 1603 * 1604 * This optimization eats a lot of memory. If we have a page 1605 * or buffer shortfall we can't do it. 1606 */ 1607 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1608 (bp->b_flags & B_ASYNC) && 1609 !vm_page_count_severe() && 1610 !buf_dirty_count_severe()) { 1611 KASSERT(bp->b_iodone == NULL, 1612 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1613 1614 /* get a new block */ 1615 newbp = geteblk(bp->b_bufsize); 1616 1617 /* 1618 * set it to be identical to the old block. We have to 1619 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1620 * to avoid confusing the splay tree and gbincore(). 1621 */ 1622 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1623 newbp->b_lblkno = bp->b_lblkno; 1624 newbp->b_xflags |= BX_BKGRDMARKER; 1625 BO_LOCK(bp->b_bufobj); 1626 bp->b_vflags |= BV_BKGRDINPROG; 1627 bgetvp(bp->b_vp, newbp); 1628 BO_UNLOCK(bp->b_bufobj); 1629 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1630 newbp->b_blkno = bp->b_blkno; 1631 newbp->b_offset = bp->b_offset; 1632 newbp->b_iodone = ffs_backgroundwritedone; 1633 newbp->b_flags |= B_ASYNC; 1634 newbp->b_flags &= ~B_INVAL; 1635 1636#ifdef SOFTUPDATES 1637 /* move over the dependencies */ 1638 if (LIST_FIRST(&bp->b_dep) != NULL) 1639 softdep_move_dependencies(bp, newbp); 1640#endif 1641 1642 /* 1643 * Initiate write on the copy, release the original to 1644 * the B_LOCKED queue so that it cannot go away until 1645 * the background write completes. If not locked it could go 1646 * away and then be reconstituted while it was being written. 1647 * If the reconstituted buffer were written, we could end up 1648 * with two background copies being written at the same time. 1649 */ 1650 bqrelse(bp); 1651 bp = newbp; 1652 } 1653 1654 /* Let the normal bufwrite do the rest for us */ 1655 bufwrite(bp); 1656 1657 return (0); 1658} 1659 1660 1661static void 1662ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1663{ 1664 1665#ifdef SOFTUPDATES 1666 if (bp->b_iocmd == BIO_WRITE && softdep_disk_prewrite(bp)) 1667 return; 1668#endif 1669 g_vfs_strategy(bo, bp); 1670} 1671