1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #include "opt_quota.h" 34 #include "opt_ufs.h" 35 #include "opt_ffs.h" 36 #include "opt_ddb.h" 37 38 #include <sys/param.h> 39 #include <sys/gsb_crc32.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/priv.h> 43 #include <sys/proc.h> 44 #include <sys/taskqueue.h> 45 #include <sys/kernel.h> 46 #include <sys/ktr.h> 47 #include <sys/vnode.h> 48 #include <sys/mount.h> 49 #include <sys/bio.h> 50 #include <sys/buf.h> 51 #include <sys/conf.h> 52 #include <sys/fcntl.h> 53 #include <sys/ioccom.h> 54 #include <sys/malloc.h> 55 #include <sys/mutex.h> 56 #include <sys/rwlock.h> 57 #include <sys/sysctl.h> 58 #include <sys/vmmeter.h> 59 60 #include <security/mac/mac_framework.h> 61 62 #include <ufs/ufs/dir.h> 63 #include <ufs/ufs/extattr.h> 64 #include <ufs/ufs/gjournal.h> 65 #include <ufs/ufs/quota.h> 66 #include <ufs/ufs/ufsmount.h> 67 #include <ufs/ufs/inode.h> 68 #include <ufs/ufs/ufs_extern.h> 69 70 #include <ufs/ffs/fs.h> 71 #include <ufs/ffs/ffs_extern.h> 72 73 #include <vm/vm.h> 74 #include <vm/uma.h> 75 #include <vm/vm_page.h> 76 77 #include <geom/geom.h> 78 #include <geom/geom_vfs.h> 79 80 #include <ddb/ddb.h> 81 82 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 83 VFS_SMR_DECLARE; 84 85 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 86 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 87 ufs2_daddr_t); 88 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 89 static int ffs_sync_lazy(struct mount *mp); 90 static int ffs_use_bread(void *devfd, off_t loc, void **bufp, int size); 91 static int ffs_use_bwrite(void *devfd, off_t loc, void *buf, int size); 92 93 static vfs_init_t ffs_init; 94 static vfs_uninit_t ffs_uninit; 95 static vfs_extattrctl_t ffs_extattrctl; 96 static vfs_cmount_t ffs_cmount; 97 static vfs_unmount_t ffs_unmount; 98 static vfs_mount_t ffs_mount; 99 static vfs_statfs_t ffs_statfs; 100 static vfs_fhtovp_t ffs_fhtovp; 101 static vfs_sync_t ffs_sync; 102 103 static struct vfsops ufs_vfsops = { 104 .vfs_extattrctl = ffs_extattrctl, 105 .vfs_fhtovp = ffs_fhtovp, 106 .vfs_init = ffs_init, 107 .vfs_mount = ffs_mount, 108 .vfs_cmount = ffs_cmount, 109 .vfs_quotactl = ufs_quotactl, 110 .vfs_root = vfs_cache_root, 111 .vfs_cachedroot = ufs_root, 112 .vfs_statfs = ffs_statfs, 113 .vfs_sync = ffs_sync, 114 .vfs_uninit = ffs_uninit, 115 .vfs_unmount = ffs_unmount, 116 .vfs_vget = ffs_vget, 117 .vfs_susp_clean = process_deferred_inactive, 118 }; 119 120 VFS_SET(ufs_vfsops, ufs, 0); 121 MODULE_VERSION(ufs, 1); 122 123 static b_strategy_t ffs_geom_strategy; 124 static b_write_t ffs_bufwrite; 125 126 static struct buf_ops ffs_ops = { 127 .bop_name = "FFS", 128 .bop_write = ffs_bufwrite, 129 .bop_strategy = ffs_geom_strategy, 130 .bop_sync = bufsync, 131 #ifdef NO_FFS_SNAPSHOT 132 .bop_bdflush = bufbdflush, 133 #else 134 .bop_bdflush = ffs_bdflush, 135 #endif 136 }; 137 138 /* 139 * Note that userquota and groupquota options are not currently used 140 * by UFS/FFS code and generally mount(8) does not pass those options 141 * from userland, but they can be passed by loader(8) via 142 * vfs.root.mountfrom.options. 143 */ 144 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 145 "noclusterw", "noexec", "export", "force", "from", "groupquota", 146 "multilabel", "nfsv4acls", "snapshot", "nosuid", "suiddir", 147 "nosymfollow", "sync", "union", "userquota", "untrusted", NULL }; 148 149 static int ffs_enxio_enable = 1; 150 SYSCTL_DECL(_vfs_ffs); 151 SYSCTL_INT(_vfs_ffs, OID_AUTO, enxio_enable, CTLFLAG_RWTUN, 152 &ffs_enxio_enable, 0, 153 "enable mapping of other disk I/O errors to ENXIO"); 154 155 /* 156 * Return buffer with the contents of block "offset" from the beginning of 157 * directory "ip". If "res" is non-zero, fill it in with a pointer to the 158 * remaining space in the directory. 159 */ 160 static int 161 ffs_blkatoff(struct vnode *vp, off_t offset, char **res, struct buf **bpp) 162 { 163 struct inode *ip; 164 struct fs *fs; 165 struct buf *bp; 166 ufs_lbn_t lbn; 167 int bsize, error; 168 169 ip = VTOI(vp); 170 fs = ITOFS(ip); 171 lbn = lblkno(fs, offset); 172 bsize = blksize(fs, ip, lbn); 173 174 *bpp = NULL; 175 error = bread(vp, lbn, bsize, NOCRED, &bp); 176 if (error) { 177 return (error); 178 } 179 if (res) 180 *res = (char *)bp->b_data + blkoff(fs, offset); 181 *bpp = bp; 182 return (0); 183 } 184 185 /* 186 * Load up the contents of an inode and copy the appropriate pieces 187 * to the incore copy. 188 */ 189 static int 190 ffs_load_inode(struct buf *bp, struct inode *ip, struct fs *fs, ino_t ino) 191 { 192 struct ufs1_dinode *dip1; 193 struct ufs2_dinode *dip2; 194 int error; 195 196 if (I_IS_UFS1(ip)) { 197 dip1 = ip->i_din1; 198 *dip1 = 199 *((struct ufs1_dinode *)bp->b_data + ino_to_fsbo(fs, ino)); 200 ip->i_mode = dip1->di_mode; 201 ip->i_nlink = dip1->di_nlink; 202 ip->i_effnlink = dip1->di_nlink; 203 ip->i_size = dip1->di_size; 204 ip->i_flags = dip1->di_flags; 205 ip->i_gen = dip1->di_gen; 206 ip->i_uid = dip1->di_uid; 207 ip->i_gid = dip1->di_gid; 208 return (0); 209 } 210 dip2 = ((struct ufs2_dinode *)bp->b_data + ino_to_fsbo(fs, ino)); 211 if ((error = ffs_verify_dinode_ckhash(fs, dip2)) != 0 && 212 !ffs_fsfail_cleanup(ITOUMP(ip), error)) { 213 printf("%s: inode %jd: check-hash failed\n", fs->fs_fsmnt, 214 (intmax_t)ino); 215 return (error); 216 } 217 *ip->i_din2 = *dip2; 218 dip2 = ip->i_din2; 219 ip->i_mode = dip2->di_mode; 220 ip->i_nlink = dip2->di_nlink; 221 ip->i_effnlink = dip2->di_nlink; 222 ip->i_size = dip2->di_size; 223 ip->i_flags = dip2->di_flags; 224 ip->i_gen = dip2->di_gen; 225 ip->i_uid = dip2->di_uid; 226 ip->i_gid = dip2->di_gid; 227 return (0); 228 } 229 230 /* 231 * Verify that a filesystem block number is a valid data block. 232 * This routine is only called on untrusted filesystems. 233 */ 234 static int 235 ffs_check_blkno(struct mount *mp, ino_t inum, ufs2_daddr_t daddr, int blksize) 236 { 237 struct fs *fs; 238 struct ufsmount *ump; 239 ufs2_daddr_t end_daddr; 240 int cg, havemtx; 241 242 KASSERT((mp->mnt_flag & MNT_UNTRUSTED) != 0, 243 ("ffs_check_blkno called on a trusted file system")); 244 ump = VFSTOUFS(mp); 245 fs = ump->um_fs; 246 cg = dtog(fs, daddr); 247 end_daddr = daddr + numfrags(fs, blksize); 248 /* 249 * Verify that the block number is a valid data block. Also check 250 * that it does not point to an inode block or a superblock. Accept 251 * blocks that are unalloacted (0) or part of snapshot metadata 252 * (BLK_NOCOPY or BLK_SNAP). 253 * 254 * Thus, the block must be in a valid range for the filesystem and 255 * either in the space before a backup superblock (except the first 256 * cylinder group where that space is used by the bootstrap code) or 257 * after the inode blocks and before the end of the cylinder group. 258 */ 259 if ((uint64_t)daddr <= BLK_SNAP || 260 ((uint64_t)end_daddr <= fs->fs_size && 261 ((cg > 0 && end_daddr <= cgsblock(fs, cg)) || 262 (daddr >= cgdmin(fs, cg) && 263 end_daddr <= cgbase(fs, cg) + fs->fs_fpg)))) 264 return (0); 265 if ((havemtx = mtx_owned(UFS_MTX(ump))) == 0) 266 UFS_LOCK(ump); 267 if (ppsratecheck(&ump->um_last_integritymsg, 268 &ump->um_secs_integritymsg, 1)) { 269 UFS_UNLOCK(ump); 270 uprintf("\n%s: inode %jd, out-of-range indirect block " 271 "number %jd\n", mp->mnt_stat.f_mntonname, inum, daddr); 272 if (havemtx) 273 UFS_LOCK(ump); 274 } else if (!havemtx) 275 UFS_UNLOCK(ump); 276 return (EINTEGRITY); 277 } 278 279 /* 280 * On first ENXIO error, initiate an asynchronous forcible unmount. 281 * Used to unmount filesystems whose underlying media has gone away. 282 * 283 * Return true if a cleanup is in progress. 284 */ 285 int 286 ffs_fsfail_cleanup(struct ufsmount *ump, int error) 287 { 288 int retval; 289 290 UFS_LOCK(ump); 291 retval = ffs_fsfail_cleanup_locked(ump, error); 292 UFS_UNLOCK(ump); 293 return (retval); 294 } 295 296 int 297 ffs_fsfail_cleanup_locked(struct ufsmount *ump, int error) 298 { 299 mtx_assert(UFS_MTX(ump), MA_OWNED); 300 if (error == ENXIO && (ump->um_flags & UM_FSFAIL_CLEANUP) == 0) { 301 ump->um_flags |= UM_FSFAIL_CLEANUP; 302 if (ump->um_mountp == rootvnode->v_mount) 303 panic("UFS: root fs would be forcibly unmounted"); 304 305 /* 306 * Queue an async forced unmount. 307 */ 308 vfs_ref(ump->um_mountp); 309 dounmount(ump->um_mountp, 310 MNT_FORCE | MNT_RECURSE | MNT_DEFERRED, curthread); 311 printf("UFS: forcibly unmounting %s from %s\n", 312 ump->um_mountp->mnt_stat.f_mntfromname, 313 ump->um_mountp->mnt_stat.f_mntonname); 314 } 315 return ((ump->um_flags & UM_FSFAIL_CLEANUP) != 0); 316 } 317 318 /* 319 * Wrapper used during ENXIO cleanup to allocate empty buffers when 320 * the kernel is unable to read the real one. They are needed so that 321 * the soft updates code can use them to unwind its dependencies. 322 */ 323 int 324 ffs_breadz(struct ufsmount *ump, struct vnode *vp, daddr_t lblkno, 325 daddr_t dblkno, int size, daddr_t *rablkno, int *rabsize, int cnt, 326 struct ucred *cred, int flags, void (*ckhashfunc)(struct buf *), 327 struct buf **bpp) 328 { 329 int error; 330 331 flags |= GB_CVTENXIO; 332 error = breadn_flags(vp, lblkno, dblkno, size, rablkno, rabsize, cnt, 333 cred, flags, ckhashfunc, bpp); 334 if (error != 0 && ffs_fsfail_cleanup(ump, error)) { 335 error = getblkx(vp, lblkno, dblkno, size, 0, 0, flags, bpp); 336 KASSERT(error == 0, ("getblkx failed")); 337 vfs_bio_bzero_buf(*bpp, 0, size); 338 } 339 return (error); 340 } 341 342 static int 343 ffs_mount(struct mount *mp) 344 { 345 struct vnode *devvp, *odevvp; 346 struct thread *td; 347 struct ufsmount *ump = NULL; 348 struct fs *fs; 349 int error, flags; 350 int error1 __diagused; 351 uint64_t mntorflags, saved_mnt_flag; 352 accmode_t accmode; 353 struct nameidata ndp; 354 char *fspec; 355 bool mounted_softdep; 356 357 td = curthread; 358 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 359 return (EINVAL); 360 if (uma_inode == NULL) { 361 uma_inode = uma_zcreate("FFS inode", 362 sizeof(struct inode), NULL, NULL, NULL, NULL, 363 UMA_ALIGN_PTR, 0); 364 uma_ufs1 = uma_zcreate("FFS1 dinode", 365 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 366 UMA_ALIGN_PTR, 0); 367 uma_ufs2 = uma_zcreate("FFS2 dinode", 368 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 369 UMA_ALIGN_PTR, 0); 370 VFS_SMR_ZONE_SET(uma_inode); 371 } 372 373 vfs_deleteopt(mp->mnt_optnew, "groupquota"); 374 vfs_deleteopt(mp->mnt_optnew, "userquota"); 375 376 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 377 if (error) 378 return (error); 379 380 mntorflags = 0; 381 if (vfs_getopt(mp->mnt_optnew, "untrusted", NULL, NULL) == 0) 382 mntorflags |= MNT_UNTRUSTED; 383 384 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 385 mntorflags |= MNT_ACLS; 386 387 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 388 mntorflags |= MNT_SNAPSHOT; 389 /* 390 * Once we have set the MNT_SNAPSHOT flag, do not 391 * persist "snapshot" in the options list. 392 */ 393 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 394 vfs_deleteopt(mp->mnt_opt, "snapshot"); 395 } 396 397 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { 398 if (mntorflags & MNT_ACLS) { 399 vfs_mount_error(mp, 400 "\"acls\" and \"nfsv4acls\" options " 401 "are mutually exclusive"); 402 return (EINVAL); 403 } 404 mntorflags |= MNT_NFS4ACLS; 405 } 406 407 MNT_ILOCK(mp); 408 mp->mnt_kern_flag &= ~MNTK_FPLOOKUP; 409 mp->mnt_flag |= mntorflags; 410 MNT_IUNLOCK(mp); 411 412 /* 413 * If this is a snapshot request, take the snapshot. 414 */ 415 if (mp->mnt_flag & MNT_SNAPSHOT) { 416 if ((mp->mnt_flag & MNT_UPDATE) == 0) 417 return (EINVAL); 418 return (ffs_snapshot(mp, fspec)); 419 } 420 421 /* 422 * Must not call namei() while owning busy ref. 423 */ 424 if (mp->mnt_flag & MNT_UPDATE) 425 vfs_unbusy(mp); 426 427 /* 428 * Not an update, or updating the name: look up the name 429 * and verify that it refers to a sensible disk device. 430 */ 431 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec); 432 error = namei(&ndp); 433 if ((mp->mnt_flag & MNT_UPDATE) != 0) { 434 /* 435 * Unmount does not start if MNT_UPDATE is set. Mount 436 * update busies mp before setting MNT_UPDATE. We 437 * must be able to retain our busy ref successfully, 438 * without sleep. 439 */ 440 error1 = vfs_busy(mp, MBF_NOWAIT); 441 MPASS(error1 == 0); 442 } 443 if (error != 0) 444 return (error); 445 NDFREE_PNBUF(&ndp); 446 if (!vn_isdisk_error(ndp.ni_vp, &error)) { 447 vput(ndp.ni_vp); 448 return (error); 449 } 450 451 /* 452 * If mount by non-root, then verify that user has necessary 453 * permissions on the device. 454 */ 455 accmode = VREAD; 456 if ((mp->mnt_flag & MNT_RDONLY) == 0) 457 accmode |= VWRITE; 458 error = VOP_ACCESS(ndp.ni_vp, accmode, td->td_ucred, td); 459 if (error) 460 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 461 if (error) { 462 vput(ndp.ni_vp); 463 return (error); 464 } 465 466 /* 467 * New mount 468 * 469 * We need the name for the mount point (also used for 470 * "last mounted on") copied in. If an error occurs, 471 * the mount point is discarded by the upper level code. 472 * Note that vfs_mount_alloc() populates f_mntonname for us. 473 */ 474 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 475 if ((error = ffs_mountfs(ndp.ni_vp, mp, td)) != 0) { 476 vrele(ndp.ni_vp); 477 return (error); 478 } 479 } else { 480 /* 481 * When updating, check whether changing from read-only to 482 * read/write; if there is no device name, that's all we do. 483 */ 484 ump = VFSTOUFS(mp); 485 fs = ump->um_fs; 486 odevvp = ump->um_odevvp; 487 devvp = ump->um_devvp; 488 489 /* 490 * If it's not the same vnode, or at least the same device 491 * then it's not correct. 492 */ 493 if (ndp.ni_vp->v_rdev != ump->um_odevvp->v_rdev) 494 error = EINVAL; /* needs translation */ 495 vput(ndp.ni_vp); 496 if (error) 497 return (error); 498 if (fs->fs_ronly == 0 && 499 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 500 /* 501 * Flush any dirty data and suspend filesystem. 502 */ 503 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 504 return (error); 505 error = vfs_write_suspend_umnt(mp); 506 if (error != 0) 507 return (error); 508 509 fs->fs_ronly = 1; 510 if (MOUNTEDSOFTDEP(mp)) { 511 MNT_ILOCK(mp); 512 mp->mnt_flag &= ~MNT_SOFTDEP; 513 MNT_IUNLOCK(mp); 514 mounted_softdep = true; 515 } else 516 mounted_softdep = false; 517 518 /* 519 * Check for and optionally get rid of files open 520 * for writing. 521 */ 522 flags = WRITECLOSE; 523 if (mp->mnt_flag & MNT_FORCE) 524 flags |= FORCECLOSE; 525 if (mounted_softdep) { 526 error = softdep_flushfiles(mp, flags, td); 527 } else { 528 error = ffs_flushfiles(mp, flags, td); 529 } 530 if (error) { 531 fs->fs_ronly = 0; 532 if (mounted_softdep) { 533 MNT_ILOCK(mp); 534 mp->mnt_flag |= MNT_SOFTDEP; 535 MNT_IUNLOCK(mp); 536 } 537 vfs_write_resume(mp, 0); 538 return (error); 539 } 540 541 if (fs->fs_pendingblocks != 0 || 542 fs->fs_pendinginodes != 0) { 543 printf("WARNING: %s Update error: blocks %jd " 544 "files %d\n", fs->fs_fsmnt, 545 (intmax_t)fs->fs_pendingblocks, 546 fs->fs_pendinginodes); 547 fs->fs_pendingblocks = 0; 548 fs->fs_pendinginodes = 0; 549 } 550 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 551 fs->fs_clean = 1; 552 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 553 fs->fs_ronly = 0; 554 fs->fs_clean = 0; 555 if (mounted_softdep) { 556 MNT_ILOCK(mp); 557 mp->mnt_flag |= MNT_SOFTDEP; 558 MNT_IUNLOCK(mp); 559 } 560 vfs_write_resume(mp, 0); 561 return (error); 562 } 563 if (mounted_softdep) 564 softdep_unmount(mp); 565 g_topology_lock(); 566 /* 567 * Drop our write and exclusive access. 568 */ 569 g_access(ump->um_cp, 0, -1, -1); 570 g_topology_unlock(); 571 MNT_ILOCK(mp); 572 mp->mnt_flag |= MNT_RDONLY; 573 MNT_IUNLOCK(mp); 574 /* 575 * Allow the writers to note that filesystem 576 * is ro now. 577 */ 578 vfs_write_resume(mp, 0); 579 } 580 if ((mp->mnt_flag & MNT_RELOAD) && 581 (error = ffs_reload(mp, 0)) != 0) 582 return (error); 583 if (fs->fs_ronly && 584 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 585 /* 586 * If upgrade to read-write by non-root, then verify 587 * that user has necessary permissions on the device. 588 */ 589 vn_lock(odevvp, LK_EXCLUSIVE | LK_RETRY); 590 error = VOP_ACCESS(odevvp, VREAD | VWRITE, 591 td->td_ucred, td); 592 if (error) 593 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 594 VOP_UNLOCK(odevvp); 595 if (error) { 596 return (error); 597 } 598 fs->fs_flags &= ~FS_UNCLEAN; 599 if (fs->fs_clean == 0) { 600 fs->fs_flags |= FS_UNCLEAN; 601 if ((mp->mnt_flag & MNT_FORCE) || 602 ((fs->fs_flags & 603 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 604 (fs->fs_flags & FS_DOSOFTDEP))) { 605 printf("WARNING: %s was not properly " 606 "dismounted\n", 607 mp->mnt_stat.f_mntonname); 608 } else { 609 vfs_mount_error(mp, 610 "R/W mount of %s denied. %s.%s", 611 mp->mnt_stat.f_mntonname, 612 "Filesystem is not clean - run fsck", 613 (fs->fs_flags & FS_SUJ) == 0 ? "" : 614 " Forced mount will invalidate" 615 " journal contents"); 616 return (EPERM); 617 } 618 } 619 g_topology_lock(); 620 /* 621 * Request exclusive write access. 622 */ 623 error = g_access(ump->um_cp, 0, 1, 1); 624 g_topology_unlock(); 625 if (error) 626 return (error); 627 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 628 return (error); 629 error = vfs_write_suspend_umnt(mp); 630 if (error != 0) 631 return (error); 632 fs->fs_ronly = 0; 633 MNT_ILOCK(mp); 634 saved_mnt_flag = MNT_RDONLY; 635 if (MOUNTEDSOFTDEP(mp) && (mp->mnt_flag & 636 MNT_ASYNC) != 0) 637 saved_mnt_flag |= MNT_ASYNC; 638 mp->mnt_flag &= ~saved_mnt_flag; 639 MNT_IUNLOCK(mp); 640 fs->fs_mtime = time_second; 641 /* check to see if we need to start softdep */ 642 if ((fs->fs_flags & FS_DOSOFTDEP) && 643 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 644 fs->fs_ronly = 1; 645 MNT_ILOCK(mp); 646 mp->mnt_flag |= saved_mnt_flag; 647 MNT_IUNLOCK(mp); 648 vfs_write_resume(mp, 0); 649 return (error); 650 } 651 fs->fs_clean = 0; 652 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 653 fs->fs_ronly = 1; 654 if ((fs->fs_flags & FS_DOSOFTDEP) != 0) 655 softdep_unmount(mp); 656 MNT_ILOCK(mp); 657 mp->mnt_flag |= saved_mnt_flag; 658 MNT_IUNLOCK(mp); 659 vfs_write_resume(mp, 0); 660 return (error); 661 } 662 if (fs->fs_snapinum[0] != 0) 663 ffs_snapshot_mount(mp); 664 vfs_write_resume(mp, 0); 665 } 666 /* 667 * Soft updates is incompatible with "async", 668 * so if we are doing softupdates stop the user 669 * from setting the async flag in an update. 670 * Softdep_mount() clears it in an initial mount 671 * or ro->rw remount. 672 */ 673 if (MOUNTEDSOFTDEP(mp)) { 674 /* XXX: Reset too late ? */ 675 MNT_ILOCK(mp); 676 mp->mnt_flag &= ~MNT_ASYNC; 677 MNT_IUNLOCK(mp); 678 } 679 /* 680 * Keep MNT_ACLS flag if it is stored in superblock. 681 */ 682 if ((fs->fs_flags & FS_ACLS) != 0) { 683 /* XXX: Set too late ? */ 684 MNT_ILOCK(mp); 685 mp->mnt_flag |= MNT_ACLS; 686 MNT_IUNLOCK(mp); 687 } 688 689 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 690 /* XXX: Set too late ? */ 691 MNT_ILOCK(mp); 692 mp->mnt_flag |= MNT_NFS4ACLS; 693 MNT_IUNLOCK(mp); 694 } 695 696 } 697 698 MNT_ILOCK(mp); 699 /* 700 * This is racy versus lookup, see ufs_fplookup_vexec for details. 701 */ 702 if ((mp->mnt_kern_flag & MNTK_FPLOOKUP) != 0) 703 panic("MNTK_FPLOOKUP set on mount %p when it should not be", mp); 704 if ((mp->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS | MNT_UNION)) == 0) 705 mp->mnt_kern_flag |= MNTK_FPLOOKUP; 706 MNT_IUNLOCK(mp); 707 708 vfs_mountedfrom(mp, fspec); 709 return (0); 710 } 711 712 /* 713 * Compatibility with old mount system call. 714 */ 715 716 static int 717 ffs_cmount(struct mntarg *ma, void *data, uint64_t flags) 718 { 719 struct ufs_args args; 720 int error; 721 722 if (data == NULL) 723 return (EINVAL); 724 error = copyin(data, &args, sizeof args); 725 if (error) 726 return (error); 727 728 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 729 ma = mount_arg(ma, "export", &args.export, sizeof(args.export)); 730 error = kernel_mount(ma, flags); 731 732 return (error); 733 } 734 735 /* 736 * Reload all incore data for a filesystem (used after running fsck on 737 * the root filesystem and finding things to fix). If the 'force' flag 738 * is 0, the filesystem must be mounted read-only. 739 * 740 * Things to do to update the mount: 741 * 1) invalidate all cached meta-data. 742 * 2) re-read superblock from disk. 743 * 3) re-read summary information from disk. 744 * 4) invalidate all inactive vnodes. 745 * 5) clear MNTK_SUSPEND2 and MNTK_SUSPENDED flags, allowing secondary 746 * writers, if requested. 747 * 6) invalidate all cached file data. 748 * 7) re-read inode data for all active vnodes. 749 */ 750 int 751 ffs_reload(struct mount *mp, int flags) 752 { 753 struct vnode *vp, *mvp, *devvp; 754 struct inode *ip; 755 void *space; 756 struct buf *bp; 757 struct fs *fs, *newfs; 758 struct ufsmount *ump; 759 ufs2_daddr_t sblockloc; 760 int i, blks, error; 761 uint64_t size; 762 int32_t *lp; 763 764 ump = VFSTOUFS(mp); 765 766 MNT_ILOCK(mp); 767 if ((mp->mnt_flag & MNT_RDONLY) == 0 && (flags & FFSR_FORCE) == 0) { 768 MNT_IUNLOCK(mp); 769 return (EINVAL); 770 } 771 MNT_IUNLOCK(mp); 772 773 /* 774 * Step 1: invalidate all cached meta-data. 775 */ 776 devvp = VFSTOUFS(mp)->um_devvp; 777 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 778 if (vinvalbuf(devvp, 0, 0, 0) != 0) 779 panic("ffs_reload: dirty1"); 780 VOP_UNLOCK(devvp); 781 782 /* 783 * Step 2: re-read superblock from disk. 784 */ 785 fs = VFSTOUFS(mp)->um_fs; 786 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 787 NOCRED, &bp)) != 0) 788 return (error); 789 newfs = (struct fs *)bp->b_data; 790 if ((newfs->fs_magic != FS_UFS1_MAGIC && 791 newfs->fs_magic != FS_UFS2_MAGIC) || 792 newfs->fs_bsize > MAXBSIZE || 793 newfs->fs_bsize < sizeof(struct fs)) { 794 brelse(bp); 795 return (EINTEGRITY); 796 } 797 /* 798 * Preserve the summary information, read-only status, and 799 * superblock location by copying these fields into our new 800 * superblock before using it to update the existing superblock. 801 */ 802 newfs->fs_si = fs->fs_si; 803 newfs->fs_ronly = fs->fs_ronly; 804 sblockloc = fs->fs_sblockloc; 805 bcopy(newfs, fs, (uint64_t)fs->fs_sbsize); 806 brelse(bp); 807 ump->um_bsize = fs->fs_bsize; 808 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 809 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 810 UFS_LOCK(ump); 811 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 812 printf("WARNING: %s: reload pending error: blocks %jd " 813 "files %d\n", mp->mnt_stat.f_mntonname, 814 (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes); 815 fs->fs_pendingblocks = 0; 816 fs->fs_pendinginodes = 0; 817 } 818 UFS_UNLOCK(ump); 819 820 /* 821 * Step 3: re-read summary information from disk. 822 */ 823 size = fs->fs_cssize; 824 blks = howmany(size, fs->fs_fsize); 825 if (fs->fs_contigsumsize > 0) 826 size += fs->fs_ncg * sizeof(int32_t); 827 size += fs->fs_ncg * sizeof(uint8_t); 828 free(fs->fs_csp, M_UFSMNT); 829 space = malloc(size, M_UFSMNT, M_WAITOK); 830 fs->fs_csp = space; 831 for (i = 0; i < blks; i += fs->fs_frag) { 832 size = fs->fs_bsize; 833 if (i + fs->fs_frag > blks) 834 size = (blks - i) * fs->fs_fsize; 835 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 836 NOCRED, &bp); 837 if (error) 838 return (error); 839 bcopy(bp->b_data, space, (uint64_t)size); 840 space = (char *)space + size; 841 brelse(bp); 842 } 843 /* 844 * We no longer know anything about clusters per cylinder group. 845 */ 846 if (fs->fs_contigsumsize > 0) { 847 fs->fs_maxcluster = lp = space; 848 for (i = 0; i < fs->fs_ncg; i++) 849 *lp++ = fs->fs_contigsumsize; 850 space = lp; 851 } 852 size = fs->fs_ncg * sizeof(uint8_t); 853 fs->fs_contigdirs = (uint8_t *)space; 854 bzero(fs->fs_contigdirs, size); 855 if ((flags & FFSR_UNSUSPEND) != 0) { 856 MNT_ILOCK(mp); 857 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | MNTK_SUSPEND2); 858 wakeup(&mp->mnt_flag); 859 MNT_IUNLOCK(mp); 860 } 861 862 loop: 863 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 864 /* 865 * Skip syncer vnode. 866 */ 867 if (vp->v_type == VNON) { 868 VI_UNLOCK(vp); 869 continue; 870 } 871 /* 872 * Step 4: invalidate all cached file data. 873 */ 874 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) { 875 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 876 goto loop; 877 } 878 if (vinvalbuf(vp, 0, 0, 0)) 879 panic("ffs_reload: dirty2"); 880 /* 881 * Step 5: re-read inode data for all active vnodes. 882 */ 883 ip = VTOI(vp); 884 error = 885 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 886 (int)fs->fs_bsize, NOCRED, &bp); 887 if (error) { 888 vput(vp); 889 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 890 return (error); 891 } 892 if ((error = ffs_load_inode(bp, ip, fs, ip->i_number)) != 0) { 893 brelse(bp); 894 vput(vp); 895 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 896 return (error); 897 } 898 ip->i_effnlink = ip->i_nlink; 899 brelse(bp); 900 vput(vp); 901 } 902 return (0); 903 } 904 905 /* 906 * Common code for mount and mountroot 907 */ 908 static int 909 ffs_mountfs(struct vnode *odevvp, struct mount *mp, struct thread *td) 910 { 911 struct ufsmount *ump; 912 struct fs *fs; 913 struct cdev *dev; 914 int error, i, len, ronly; 915 struct ucred *cred; 916 struct g_consumer *cp; 917 struct mount *nmp; 918 struct vnode *devvp; 919 int candelete, canspeedup; 920 921 fs = NULL; 922 ump = NULL; 923 cred = td ? td->td_ucred : NOCRED; 924 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 925 926 devvp = mntfs_allocvp(mp, odevvp); 927 KASSERT(devvp->v_type == VCHR, ("reclaimed devvp")); 928 dev = devvp->v_rdev; 929 KASSERT(dev->si_snapdata == NULL, ("non-NULL snapshot data")); 930 if (atomic_cmpset_acq_ptr((uintptr_t *)&dev->si_mountpt, 0, 931 (uintptr_t)mp) == 0) { 932 mntfs_freevp(devvp); 933 return (EBUSY); 934 } 935 g_topology_lock(); 936 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 937 g_topology_unlock(); 938 if (error != 0) { 939 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0); 940 mntfs_freevp(devvp); 941 return (error); 942 } 943 dev_ref(dev); 944 devvp->v_bufobj.bo_ops = &ffs_ops; 945 BO_LOCK(&odevvp->v_bufobj); 946 odevvp->v_bufobj.bo_flag |= BO_NOBUFS; 947 BO_UNLOCK(&odevvp->v_bufobj); 948 VOP_UNLOCK(devvp); 949 if (dev->si_iosize_max != 0) 950 mp->mnt_iosize_max = dev->si_iosize_max; 951 if (mp->mnt_iosize_max > maxphys) 952 mp->mnt_iosize_max = maxphys; 953 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 954 error = EINVAL; 955 vfs_mount_error(mp, 956 "Invalid sectorsize %d for superblock size %d", 957 cp->provider->sectorsize, SBLOCKSIZE); 958 goto out; 959 } 960 /* fetch the superblock and summary information */ 961 if ((mp->mnt_flag & (MNT_ROOTFS | MNT_FORCE)) != 0) 962 error = ffs_sbsearch(devvp, &fs, 0, M_UFSMNT, ffs_use_bread); 963 else 964 error = ffs_sbget(devvp, &fs, UFS_STDSB, 0, M_UFSMNT, 965 ffs_use_bread); 966 if (error != 0) 967 goto out; 968 fs->fs_flags &= ~FS_UNCLEAN; 969 if (fs->fs_clean == 0) { 970 fs->fs_flags |= FS_UNCLEAN; 971 if (ronly || (mp->mnt_flag & MNT_FORCE) || 972 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 973 (fs->fs_flags & FS_DOSOFTDEP))) { 974 printf("WARNING: %s was not properly dismounted\n", 975 mp->mnt_stat.f_mntonname); 976 } else { 977 vfs_mount_error(mp, "R/W mount on %s denied. " 978 "Filesystem is not clean - run fsck.%s", 979 mp->mnt_stat.f_mntonname, 980 (fs->fs_flags & FS_SUJ) == 0 ? "" : 981 " Forced mount will invalidate journal contents"); 982 error = EPERM; 983 goto out; 984 } 985 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 986 (mp->mnt_flag & MNT_FORCE)) { 987 printf("WARNING: %s: lost blocks %jd files %d\n", 988 mp->mnt_stat.f_mntonname, 989 (intmax_t)fs->fs_pendingblocks, 990 fs->fs_pendinginodes); 991 fs->fs_pendingblocks = 0; 992 fs->fs_pendinginodes = 0; 993 } 994 } 995 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 996 printf("WARNING: %s: mount pending error: blocks %jd " 997 "files %d\n", mp->mnt_stat.f_mntonname, 998 (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes); 999 fs->fs_pendingblocks = 0; 1000 fs->fs_pendinginodes = 0; 1001 } 1002 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 1003 #ifdef UFS_GJOURNAL 1004 /* 1005 * Get journal provider name. 1006 */ 1007 len = 1024; 1008 mp->mnt_gjprovider = malloc((uint64_t)len, M_UFSMNT, M_WAITOK); 1009 if (g_io_getattr("GJOURNAL::provider", cp, &len, 1010 mp->mnt_gjprovider) == 0) { 1011 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, len, 1012 M_UFSMNT, M_WAITOK); 1013 MNT_ILOCK(mp); 1014 mp->mnt_flag |= MNT_GJOURNAL; 1015 MNT_IUNLOCK(mp); 1016 } else { 1017 if ((mp->mnt_flag & MNT_RDONLY) == 0) 1018 printf("WARNING: %s: GJOURNAL flag on fs " 1019 "but no gjournal provider below\n", 1020 mp->mnt_stat.f_mntonname); 1021 free(mp->mnt_gjprovider, M_UFSMNT); 1022 mp->mnt_gjprovider = NULL; 1023 } 1024 #else 1025 printf("WARNING: %s: GJOURNAL flag on fs but no " 1026 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 1027 #endif 1028 } else { 1029 mp->mnt_gjprovider = NULL; 1030 } 1031 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 1032 ump->um_cp = cp; 1033 ump->um_bo = &devvp->v_bufobj; 1034 ump->um_fs = fs; 1035 if (fs->fs_magic == FS_UFS1_MAGIC) { 1036 ump->um_fstype = UFS1; 1037 ump->um_balloc = ffs_balloc_ufs1; 1038 } else { 1039 ump->um_fstype = UFS2; 1040 ump->um_balloc = ffs_balloc_ufs2; 1041 } 1042 ump->um_blkatoff = ffs_blkatoff; 1043 ump->um_truncate = ffs_truncate; 1044 ump->um_update = ffs_update; 1045 ump->um_valloc = ffs_valloc; 1046 ump->um_vfree = ffs_vfree; 1047 ump->um_ifree = ffs_ifree; 1048 ump->um_rdonly = ffs_rdonly; 1049 ump->um_snapgone = ffs_snapgone; 1050 if ((mp->mnt_flag & MNT_UNTRUSTED) != 0) 1051 ump->um_check_blkno = ffs_check_blkno; 1052 else 1053 ump->um_check_blkno = NULL; 1054 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 1055 sx_init(&ump->um_checkpath_lock, "uchpth"); 1056 ffs_oldfscompat_read(fs, ump, fs->fs_sblockloc); 1057 fs->fs_ronly = ronly; 1058 fs->fs_active = NULL; 1059 mp->mnt_data = ump; 1060 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 1061 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 1062 nmp = NULL; 1063 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 1064 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 1065 if (nmp) 1066 vfs_rel(nmp); 1067 vfs_getnewfsid(mp); 1068 } 1069 ump->um_bsize = fs->fs_bsize; 1070 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 1071 MNT_ILOCK(mp); 1072 mp->mnt_flag |= MNT_LOCAL; 1073 MNT_IUNLOCK(mp); 1074 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 1075 #ifdef MAC 1076 MNT_ILOCK(mp); 1077 mp->mnt_flag |= MNT_MULTILABEL; 1078 MNT_IUNLOCK(mp); 1079 #else 1080 printf("WARNING: %s: multilabel flag on fs but " 1081 "no MAC support\n", mp->mnt_stat.f_mntonname); 1082 #endif 1083 } 1084 if ((fs->fs_flags & FS_ACLS) != 0) { 1085 #ifdef UFS_ACL 1086 MNT_ILOCK(mp); 1087 1088 if (mp->mnt_flag & MNT_NFS4ACLS) 1089 printf("WARNING: %s: ACLs flag on fs conflicts with " 1090 "\"nfsv4acls\" mount option; option ignored\n", 1091 mp->mnt_stat.f_mntonname); 1092 mp->mnt_flag &= ~MNT_NFS4ACLS; 1093 mp->mnt_flag |= MNT_ACLS; 1094 1095 MNT_IUNLOCK(mp); 1096 #else 1097 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 1098 mp->mnt_stat.f_mntonname); 1099 #endif 1100 } 1101 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 1102 #ifdef UFS_ACL 1103 MNT_ILOCK(mp); 1104 1105 if (mp->mnt_flag & MNT_ACLS) 1106 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 1107 "with \"acls\" mount option; option ignored\n", 1108 mp->mnt_stat.f_mntonname); 1109 mp->mnt_flag &= ~MNT_ACLS; 1110 mp->mnt_flag |= MNT_NFS4ACLS; 1111 1112 MNT_IUNLOCK(mp); 1113 #else 1114 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 1115 "ACLs support\n", mp->mnt_stat.f_mntonname); 1116 #endif 1117 } 1118 if ((fs->fs_flags & FS_TRIM) != 0) { 1119 len = sizeof(int); 1120 if (g_io_getattr("GEOM::candelete", cp, &len, 1121 &candelete) == 0) { 1122 if (candelete) 1123 ump->um_flags |= UM_CANDELETE; 1124 else 1125 printf("WARNING: %s: TRIM flag on fs but disk " 1126 "does not support TRIM\n", 1127 mp->mnt_stat.f_mntonname); 1128 } else { 1129 printf("WARNING: %s: TRIM flag on fs but disk does " 1130 "not confirm that it supports TRIM\n", 1131 mp->mnt_stat.f_mntonname); 1132 } 1133 if (((ump->um_flags) & UM_CANDELETE) != 0) { 1134 ump->um_trim_tq = taskqueue_create("trim", M_WAITOK, 1135 taskqueue_thread_enqueue, &ump->um_trim_tq); 1136 taskqueue_start_threads(&ump->um_trim_tq, 1, PVFS, 1137 "%s trim", mp->mnt_stat.f_mntonname); 1138 ump->um_trimhash = hashinit(MAXTRIMIO, M_TRIM, 1139 &ump->um_trimlisthashsize); 1140 } 1141 } 1142 1143 len = sizeof(int); 1144 if (g_io_getattr("GEOM::canspeedup", cp, &len, &canspeedup) == 0) { 1145 if (canspeedup) 1146 ump->um_flags |= UM_CANSPEEDUP; 1147 } 1148 1149 ump->um_mountp = mp; 1150 ump->um_dev = dev; 1151 ump->um_devvp = devvp; 1152 ump->um_odevvp = odevvp; 1153 ump->um_nindir = fs->fs_nindir; 1154 ump->um_bptrtodb = fs->fs_fsbtodb; 1155 ump->um_seqinc = fs->fs_frag; 1156 for (i = 0; i < MAXQUOTAS; i++) 1157 ump->um_quotas[i] = NULLVP; 1158 #ifdef UFS_EXTATTR 1159 ufs_extattr_uepm_init(&ump->um_extattr); 1160 #endif 1161 /* 1162 * Set FS local "last mounted on" information (NULL pad) 1163 */ 1164 bzero(fs->fs_fsmnt, MAXMNTLEN); 1165 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1166 mp->mnt_stat.f_iosize = fs->fs_bsize; 1167 1168 if (mp->mnt_flag & MNT_ROOTFS) { 1169 /* 1170 * Root mount; update timestamp in mount structure. 1171 * this will be used by the common root mount code 1172 * to update the system clock. 1173 */ 1174 mp->mnt_time = fs->fs_time; 1175 } 1176 1177 if (ronly == 0) { 1178 fs->fs_mtime = time_second; 1179 if ((fs->fs_flags & FS_DOSOFTDEP) && 1180 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1181 ffs_flushfiles(mp, FORCECLOSE, td); 1182 goto out; 1183 } 1184 if (fs->fs_snapinum[0] != 0) 1185 ffs_snapshot_mount(mp); 1186 fs->fs_fmod = 1; 1187 fs->fs_clean = 0; 1188 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1189 } 1190 /* 1191 * Initialize filesystem state information in mount struct. 1192 */ 1193 MNT_ILOCK(mp); 1194 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED | 1195 MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS | MNTK_USES_BCACHE; 1196 MNT_IUNLOCK(mp); 1197 #ifdef UFS_EXTATTR 1198 #ifdef UFS_EXTATTR_AUTOSTART 1199 /* 1200 * 1201 * Auto-starting does the following: 1202 * - check for /.attribute in the fs, and extattr_start if so 1203 * - for each file in .attribute, enable that file with 1204 * an attribute of the same name. 1205 * Not clear how to report errors -- probably eat them. 1206 * This would all happen while the filesystem was busy/not 1207 * available, so would effectively be "atomic". 1208 */ 1209 (void) ufs_extattr_autostart(mp, td); 1210 #endif /* !UFS_EXTATTR_AUTOSTART */ 1211 #endif /* !UFS_EXTATTR */ 1212 return (0); 1213 out: 1214 if (fs != NULL) { 1215 free(fs->fs_csp, M_UFSMNT); 1216 free(fs->fs_si, M_UFSMNT); 1217 free(fs, M_UFSMNT); 1218 } 1219 if (cp != NULL) { 1220 g_topology_lock(); 1221 g_vfs_close(cp); 1222 g_topology_unlock(); 1223 } 1224 if (ump != NULL) { 1225 mtx_destroy(UFS_MTX(ump)); 1226 sx_destroy(&ump->um_checkpath_lock); 1227 if (mp->mnt_gjprovider != NULL) { 1228 free(mp->mnt_gjprovider, M_UFSMNT); 1229 mp->mnt_gjprovider = NULL; 1230 } 1231 MPASS(ump->um_softdep == NULL); 1232 free(ump, M_UFSMNT); 1233 mp->mnt_data = NULL; 1234 } 1235 BO_LOCK(&odevvp->v_bufobj); 1236 odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS; 1237 BO_UNLOCK(&odevvp->v_bufobj); 1238 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0); 1239 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1240 mntfs_freevp(devvp); 1241 dev_rel(dev); 1242 return (error); 1243 } 1244 1245 /* 1246 * A read function for use by filesystem-layer routines. 1247 */ 1248 static int 1249 ffs_use_bread(void *devfd, off_t loc, void **bufp, int size) 1250 { 1251 struct buf *bp; 1252 int error; 1253 1254 KASSERT(*bufp == NULL, ("ffs_use_bread: non-NULL *bufp %p\n", *bufp)); 1255 *bufp = malloc(size, M_UFSMNT, M_WAITOK); 1256 if ((error = bread((struct vnode *)devfd, btodb(loc), size, NOCRED, 1257 &bp)) != 0) 1258 return (error); 1259 bcopy(bp->b_data, *bufp, size); 1260 bp->b_flags |= B_INVAL | B_NOCACHE; 1261 brelse(bp); 1262 return (0); 1263 } 1264 1265 static int bigcgs = 0; 1266 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1267 1268 /* 1269 * Sanity checks for loading old filesystem superblocks. 1270 * See ffs_oldfscompat_write below for unwound actions. 1271 * 1272 * XXX - Parts get retired eventually. 1273 * Unfortunately new bits get added. 1274 */ 1275 static void 1276 ffs_oldfscompat_read(struct fs *fs, 1277 struct ufsmount *ump, 1278 ufs2_daddr_t sblockloc) 1279 { 1280 off_t maxfilesize; 1281 1282 /* 1283 * If not yet done, update fs_flags location and value of fs_sblockloc. 1284 */ 1285 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1286 fs->fs_flags = fs->fs_old_flags; 1287 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1288 fs->fs_sblockloc = sblockloc; 1289 } 1290 /* 1291 * If not yet done, update UFS1 superblock with new wider fields. 1292 */ 1293 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1294 fs->fs_maxbsize = fs->fs_bsize; 1295 fs->fs_time = fs->fs_old_time; 1296 fs->fs_size = fs->fs_old_size; 1297 fs->fs_dsize = fs->fs_old_dsize; 1298 fs->fs_csaddr = fs->fs_old_csaddr; 1299 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1300 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1301 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1302 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1303 } 1304 if (fs->fs_magic == FS_UFS1_MAGIC && 1305 fs->fs_old_inodefmt < FS_44INODEFMT) { 1306 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1307 fs->fs_qbmask = ~fs->fs_bmask; 1308 fs->fs_qfmask = ~fs->fs_fmask; 1309 } 1310 if (fs->fs_magic == FS_UFS1_MAGIC) { 1311 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1312 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1313 if (fs->fs_maxfilesize > maxfilesize) 1314 fs->fs_maxfilesize = maxfilesize; 1315 } 1316 /* Compatibility for old filesystems */ 1317 if (fs->fs_avgfilesize <= 0) 1318 fs->fs_avgfilesize = AVFILESIZ; 1319 if (fs->fs_avgfpdir <= 0) 1320 fs->fs_avgfpdir = AFPDIR; 1321 if (bigcgs) { 1322 fs->fs_save_cgsize = fs->fs_cgsize; 1323 fs->fs_cgsize = fs->fs_bsize; 1324 } 1325 } 1326 1327 /* 1328 * Unwinding superblock updates for old filesystems. 1329 * See ffs_oldfscompat_read above for details. 1330 * 1331 * XXX - Parts get retired eventually. 1332 * Unfortunately new bits get added. 1333 */ 1334 void 1335 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump) 1336 { 1337 1338 /* 1339 * Copy back UFS2 updated fields that UFS1 inspects. 1340 */ 1341 if (fs->fs_magic == FS_UFS1_MAGIC) { 1342 fs->fs_old_time = fs->fs_time; 1343 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1344 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1345 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1346 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1347 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1348 } 1349 if (bigcgs) { 1350 fs->fs_cgsize = fs->fs_save_cgsize; 1351 fs->fs_save_cgsize = 0; 1352 } 1353 } 1354 1355 /* 1356 * unmount system call 1357 */ 1358 static int 1359 ffs_unmount(struct mount *mp, int mntflags) 1360 { 1361 struct thread *td; 1362 struct ufsmount *ump = VFSTOUFS(mp); 1363 struct fs *fs; 1364 int error, flags, susp; 1365 #ifdef UFS_EXTATTR 1366 int e_restart; 1367 #endif 1368 1369 flags = 0; 1370 td = curthread; 1371 fs = ump->um_fs; 1372 if (mntflags & MNT_FORCE) 1373 flags |= FORCECLOSE; 1374 susp = fs->fs_ronly == 0; 1375 #ifdef UFS_EXTATTR 1376 if ((error = ufs_extattr_stop(mp, td))) { 1377 if (error != EOPNOTSUPP) 1378 printf("WARNING: unmount %s: ufs_extattr_stop " 1379 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1380 error); 1381 e_restart = 0; 1382 } else { 1383 ufs_extattr_uepm_destroy(&ump->um_extattr); 1384 e_restart = 1; 1385 } 1386 #endif 1387 if (susp) { 1388 error = vfs_write_suspend_umnt(mp); 1389 if (error != 0) 1390 goto fail1; 1391 } 1392 if (MOUNTEDSOFTDEP(mp)) 1393 error = softdep_flushfiles(mp, flags, td); 1394 else 1395 error = ffs_flushfiles(mp, flags, td); 1396 if (error != 0 && !ffs_fsfail_cleanup(ump, error)) 1397 goto fail; 1398 1399 UFS_LOCK(ump); 1400 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1401 printf("WARNING: unmount %s: pending error: blocks %jd " 1402 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1403 fs->fs_pendinginodes); 1404 fs->fs_pendingblocks = 0; 1405 fs->fs_pendinginodes = 0; 1406 } 1407 UFS_UNLOCK(ump); 1408 if (MOUNTEDSOFTDEP(mp)) 1409 softdep_unmount(mp); 1410 MPASS(ump->um_softdep == NULL); 1411 if (fs->fs_ronly == 0) { 1412 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1413 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1414 if (ffs_fsfail_cleanup(ump, error)) 1415 error = 0; 1416 if (error != 0 && !ffs_fsfail_cleanup(ump, error)) { 1417 fs->fs_clean = 0; 1418 goto fail; 1419 } 1420 } 1421 if (susp) 1422 vfs_write_resume(mp, VR_START_WRITE); 1423 if (ump->um_trim_tq != NULL) { 1424 MPASS(ump->um_trim_inflight == 0); 1425 taskqueue_free(ump->um_trim_tq); 1426 free (ump->um_trimhash, M_TRIM); 1427 } 1428 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1429 g_topology_lock(); 1430 g_vfs_close(ump->um_cp); 1431 g_topology_unlock(); 1432 BO_LOCK(&ump->um_odevvp->v_bufobj); 1433 ump->um_odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS; 1434 BO_UNLOCK(&ump->um_odevvp->v_bufobj); 1435 atomic_store_rel_ptr((uintptr_t *)&ump->um_dev->si_mountpt, 0); 1436 mntfs_freevp(ump->um_devvp); 1437 vrele(ump->um_odevvp); 1438 dev_rel(ump->um_dev); 1439 mtx_destroy(UFS_MTX(ump)); 1440 sx_destroy(&ump->um_checkpath_lock); 1441 if (mp->mnt_gjprovider != NULL) { 1442 free(mp->mnt_gjprovider, M_UFSMNT); 1443 mp->mnt_gjprovider = NULL; 1444 } 1445 free(fs->fs_csp, M_UFSMNT); 1446 free(fs->fs_si, M_UFSMNT); 1447 free(fs, M_UFSMNT); 1448 free(ump, M_UFSMNT); 1449 mp->mnt_data = NULL; 1450 if (td->td_su == mp) { 1451 td->td_su = NULL; 1452 vfs_rel(mp); 1453 } 1454 return (error); 1455 1456 fail: 1457 if (susp) 1458 vfs_write_resume(mp, VR_START_WRITE); 1459 fail1: 1460 #ifdef UFS_EXTATTR 1461 if (e_restart) { 1462 ufs_extattr_uepm_init(&ump->um_extattr); 1463 #ifdef UFS_EXTATTR_AUTOSTART 1464 (void) ufs_extattr_autostart(mp, td); 1465 #endif 1466 } 1467 #endif 1468 1469 return (error); 1470 } 1471 1472 /* 1473 * Flush out all the files in a filesystem. 1474 */ 1475 int 1476 ffs_flushfiles(struct mount *mp, int flags, struct thread *td) 1477 { 1478 struct ufsmount *ump; 1479 int qerror, error; 1480 1481 ump = VFSTOUFS(mp); 1482 qerror = 0; 1483 #ifdef QUOTA 1484 if (mp->mnt_flag & MNT_QUOTA) { 1485 int i; 1486 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1487 if (error) 1488 return (error); 1489 for (i = 0; i < MAXQUOTAS; i++) { 1490 error = quotaoff(td, mp, i); 1491 if (error != 0) { 1492 if ((flags & EARLYFLUSH) == 0) 1493 return (error); 1494 else 1495 qerror = error; 1496 } 1497 } 1498 1499 /* 1500 * Here we fall through to vflush again to ensure that 1501 * we have gotten rid of all the system vnodes, unless 1502 * quotas must not be closed. 1503 */ 1504 } 1505 #endif 1506 /* devvp is not locked there */ 1507 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1508 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1509 return (error); 1510 ffs_snapshot_unmount(mp); 1511 flags |= FORCECLOSE; 1512 /* 1513 * Here we fall through to vflush again to ensure 1514 * that we have gotten rid of all the system vnodes. 1515 */ 1516 } 1517 1518 /* 1519 * Do not close system files if quotas were not closed, to be 1520 * able to sync the remaining dquots. The freeblks softupdate 1521 * workitems might hold a reference on a dquot, preventing 1522 * quotaoff() from completing. Next round of 1523 * softdep_flushworklist() iteration should process the 1524 * blockers, allowing the next run of quotaoff() to finally 1525 * flush held dquots. 1526 * 1527 * Otherwise, flush all the files. 1528 */ 1529 if (qerror == 0 && (error = vflush(mp, 0, flags, td)) != 0) 1530 return (error); 1531 1532 /* 1533 * If this is a forcible unmount and there were any files that 1534 * were unlinked but still open, then vflush() will have 1535 * truncated and freed those files, which might have started 1536 * some trim work. Wait here for any trims to complete 1537 * and process the blkfrees which follow the trims. 1538 * This may create more dirty devvp buffers and softdep deps. 1539 */ 1540 if (ump->um_trim_tq != NULL) { 1541 while (ump->um_trim_inflight != 0) 1542 pause("ufsutr", hz); 1543 taskqueue_drain_all(ump->um_trim_tq); 1544 } 1545 1546 /* 1547 * Flush filesystem metadata. 1548 */ 1549 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1550 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1551 VOP_UNLOCK(ump->um_devvp); 1552 return (error); 1553 } 1554 1555 /* 1556 * Get filesystem statistics. 1557 */ 1558 static int 1559 ffs_statfs(struct mount *mp, struct statfs *sbp) 1560 { 1561 struct ufsmount *ump; 1562 struct fs *fs; 1563 1564 ump = VFSTOUFS(mp); 1565 fs = ump->um_fs; 1566 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1567 panic("ffs_statfs"); 1568 sbp->f_version = STATFS_VERSION; 1569 sbp->f_bsize = fs->fs_fsize; 1570 sbp->f_iosize = fs->fs_bsize; 1571 sbp->f_blocks = fs->fs_dsize; 1572 UFS_LOCK(ump); 1573 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1574 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1575 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1576 dbtofsb(fs, fs->fs_pendingblocks); 1577 sbp->f_files = fs->fs_ncg * fs->fs_ipg - UFS_ROOTINO; 1578 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1579 UFS_UNLOCK(ump); 1580 sbp->f_namemax = UFS_MAXNAMLEN; 1581 return (0); 1582 } 1583 1584 static bool 1585 sync_doupdate(struct inode *ip) 1586 { 1587 1588 return ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1589 IN_UPDATE)) != 0); 1590 } 1591 1592 static int 1593 ffs_sync_lazy_filter(struct vnode *vp, void *arg __unused) 1594 { 1595 struct inode *ip; 1596 1597 /* 1598 * Flags are safe to access because ->v_data invalidation 1599 * is held off by listmtx. 1600 */ 1601 if (vp->v_type == VNON) 1602 return (false); 1603 ip = VTOI(vp); 1604 if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0) 1605 return (false); 1606 return (true); 1607 } 1608 1609 /* 1610 * For a lazy sync, we only care about access times, quotas and the 1611 * superblock. Other filesystem changes are already converted to 1612 * cylinder group blocks or inode blocks updates and are written to 1613 * disk by syncer. 1614 */ 1615 static int 1616 ffs_sync_lazy(struct mount *mp) 1617 { 1618 struct vnode *mvp, *vp; 1619 struct inode *ip; 1620 int allerror, error; 1621 1622 allerror = 0; 1623 if ((mp->mnt_flag & MNT_NOATIME) != 0) { 1624 #ifdef QUOTA 1625 qsync(mp); 1626 #endif 1627 goto sbupdate; 1628 } 1629 MNT_VNODE_FOREACH_LAZY(vp, mp, mvp, ffs_sync_lazy_filter, NULL) { 1630 if (vp->v_type == VNON) { 1631 VI_UNLOCK(vp); 1632 continue; 1633 } 1634 ip = VTOI(vp); 1635 1636 /* 1637 * The IN_ACCESS flag is converted to IN_MODIFIED by 1638 * ufs_close() and ufs_getattr() by the calls to 1639 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1640 * Test also all the other timestamp flags too, to pick up 1641 * any other cases that could be missed. 1642 */ 1643 if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0) { 1644 VI_UNLOCK(vp); 1645 continue; 1646 } 1647 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK)) != 0) 1648 continue; 1649 #ifdef QUOTA 1650 qsyncvp(vp); 1651 #endif 1652 if (sync_doupdate(ip)) 1653 error = ffs_update(vp, 0); 1654 if (error != 0) 1655 allerror = error; 1656 vput(vp); 1657 } 1658 sbupdate: 1659 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1660 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1661 allerror = error; 1662 return (allerror); 1663 } 1664 1665 /* 1666 * Go through the disk queues to initiate sandbagged IO; 1667 * go through the inodes to write those that have been modified; 1668 * initiate the writing of the super block if it has been modified. 1669 * 1670 * Note: we are always called with the filesystem marked busy using 1671 * vfs_busy(). 1672 */ 1673 static int 1674 ffs_sync(struct mount *mp, int waitfor) 1675 { 1676 struct vnode *mvp, *vp, *devvp; 1677 struct thread *td; 1678 struct inode *ip; 1679 struct ufsmount *ump = VFSTOUFS(mp); 1680 struct fs *fs; 1681 int error, count, lockreq, allerror = 0; 1682 int suspend; 1683 int suspended; 1684 int secondary_writes; 1685 int secondary_accwrites; 1686 int softdep_deps; 1687 int softdep_accdeps; 1688 struct bufobj *bo; 1689 1690 suspend = 0; 1691 suspended = 0; 1692 td = curthread; 1693 fs = ump->um_fs; 1694 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) 1695 panic("%s: ffs_sync: modification on read-only filesystem", 1696 fs->fs_fsmnt); 1697 if (waitfor == MNT_LAZY) { 1698 if (!rebooting) 1699 return (ffs_sync_lazy(mp)); 1700 waitfor = MNT_NOWAIT; 1701 } 1702 1703 /* 1704 * Write back each (modified) inode. 1705 */ 1706 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1707 if (waitfor == MNT_SUSPEND) { 1708 suspend = 1; 1709 waitfor = MNT_WAIT; 1710 } 1711 if (waitfor == MNT_WAIT) 1712 lockreq = LK_EXCLUSIVE; 1713 lockreq |= LK_INTERLOCK; 1714 loop: 1715 /* Grab snapshot of secondary write counts */ 1716 MNT_ILOCK(mp); 1717 secondary_writes = mp->mnt_secondary_writes; 1718 secondary_accwrites = mp->mnt_secondary_accwrites; 1719 MNT_IUNLOCK(mp); 1720 1721 /* Grab snapshot of softdep dependency counts */ 1722 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1723 1724 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1725 /* 1726 * Depend on the vnode interlock to keep things stable enough 1727 * for a quick test. Since there might be hundreds of 1728 * thousands of vnodes, we cannot afford even a subroutine 1729 * call unless there's a good chance that we have work to do. 1730 */ 1731 if (vp->v_type == VNON) { 1732 VI_UNLOCK(vp); 1733 continue; 1734 } 1735 ip = VTOI(vp); 1736 if ((ip->i_flag & 1737 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1738 vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1739 VI_UNLOCK(vp); 1740 continue; 1741 } 1742 if ((error = vget(vp, lockreq)) != 0) { 1743 if (error == ENOENT) { 1744 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1745 goto loop; 1746 } 1747 continue; 1748 } 1749 #ifdef QUOTA 1750 qsyncvp(vp); 1751 #endif 1752 for (;;) { 1753 error = ffs_syncvnode(vp, waitfor, 0); 1754 if (error == ERELOOKUP) 1755 continue; 1756 if (error != 0) 1757 allerror = error; 1758 break; 1759 } 1760 vput(vp); 1761 } 1762 /* 1763 * Force stale filesystem control information to be flushed. 1764 */ 1765 if (waitfor == MNT_WAIT || rebooting) { 1766 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1767 allerror = error; 1768 if (ffs_fsfail_cleanup(ump, allerror)) 1769 allerror = 0; 1770 /* Flushed work items may create new vnodes to clean */ 1771 if (allerror == 0 && count) 1772 goto loop; 1773 } 1774 1775 devvp = ump->um_devvp; 1776 bo = &devvp->v_bufobj; 1777 BO_LOCK(bo); 1778 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1779 BO_UNLOCK(bo); 1780 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1781 error = VOP_FSYNC(devvp, waitfor, td); 1782 VOP_UNLOCK(devvp); 1783 if (MOUNTEDSOFTDEP(mp) && (error == 0 || error == EAGAIN)) 1784 error = ffs_sbupdate(ump, waitfor, 0); 1785 if (error != 0) 1786 allerror = error; 1787 if (ffs_fsfail_cleanup(ump, allerror)) 1788 allerror = 0; 1789 if (allerror == 0 && waitfor == MNT_WAIT) 1790 goto loop; 1791 } else if (suspend != 0) { 1792 if (softdep_check_suspend(mp, 1793 devvp, 1794 softdep_deps, 1795 softdep_accdeps, 1796 secondary_writes, 1797 secondary_accwrites) != 0) { 1798 MNT_IUNLOCK(mp); 1799 goto loop; /* More work needed */ 1800 } 1801 mtx_assert(MNT_MTX(mp), MA_OWNED); 1802 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1803 MNT_IUNLOCK(mp); 1804 suspended = 1; 1805 } else 1806 BO_UNLOCK(bo); 1807 /* 1808 * Write back modified superblock. 1809 */ 1810 if (fs->fs_fmod != 0 && 1811 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1812 allerror = error; 1813 if (ffs_fsfail_cleanup(ump, allerror)) 1814 allerror = 0; 1815 return (allerror); 1816 } 1817 1818 int 1819 ffs_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 1820 { 1821 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1822 } 1823 1824 int 1825 ffs_vgetf(struct mount *mp, 1826 ino_t ino, 1827 int flags, 1828 struct vnode **vpp, 1829 int ffs_flags) 1830 { 1831 struct fs *fs; 1832 struct inode *ip; 1833 struct ufsmount *ump; 1834 struct buf *bp; 1835 struct vnode *vp; 1836 daddr_t dbn; 1837 int error; 1838 1839 MPASS((ffs_flags & (FFSV_REPLACE | FFSV_REPLACE_DOOMED)) == 0 || 1840 (flags & LK_EXCLUSIVE) != 0); 1841 1842 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1843 if (error != 0) 1844 return (error); 1845 if (*vpp != NULL) { 1846 if ((ffs_flags & FFSV_REPLACE) == 0 || 1847 ((ffs_flags & FFSV_REPLACE_DOOMED) == 0 || 1848 !VN_IS_DOOMED(*vpp))) 1849 return (0); 1850 vgone(*vpp); 1851 vput(*vpp); 1852 } 1853 1854 /* 1855 * We must promote to an exclusive lock for vnode creation. This 1856 * can happen if lookup is passed LOCKSHARED. 1857 */ 1858 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1859 flags &= ~LK_TYPE_MASK; 1860 flags |= LK_EXCLUSIVE; 1861 } 1862 1863 /* 1864 * We do not lock vnode creation as it is believed to be too 1865 * expensive for such rare case as simultaneous creation of vnode 1866 * for same ino by different processes. We just allow them to race 1867 * and check later to decide who wins. Let the race begin! 1868 */ 1869 1870 ump = VFSTOUFS(mp); 1871 fs = ump->um_fs; 1872 ip = uma_zalloc_smr(uma_inode, M_WAITOK | M_ZERO); 1873 1874 /* Allocate a new vnode/inode. */ 1875 error = getnewvnode("ufs", mp, fs->fs_magic == FS_UFS1_MAGIC ? 1876 &ffs_vnodeops1 : &ffs_vnodeops2, &vp); 1877 if (error) { 1878 *vpp = NULL; 1879 uma_zfree_smr(uma_inode, ip); 1880 return (error); 1881 } 1882 /* 1883 * FFS supports recursive locking. 1884 */ 1885 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 1886 VN_LOCK_AREC(vp); 1887 vp->v_data = ip; 1888 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1889 ip->i_vnode = vp; 1890 ip->i_ump = ump; 1891 ip->i_number = ino; 1892 ip->i_ea_refs = 0; 1893 ip->i_nextclustercg = -1; 1894 ip->i_flag = fs->fs_magic == FS_UFS1_MAGIC ? 0 : IN_UFS2; 1895 ip->i_mode = 0; /* ensure error cases below throw away vnode */ 1896 cluster_init_vn(&ip->i_clusterw); 1897 #ifdef DIAGNOSTIC 1898 ufs_init_trackers(ip); 1899 #endif 1900 #ifdef QUOTA 1901 { 1902 int i; 1903 for (i = 0; i < MAXQUOTAS; i++) 1904 ip->i_dquot[i] = NODQUOT; 1905 } 1906 #endif 1907 1908 if (ffs_flags & FFSV_FORCEINSMQ) 1909 vp->v_vflag |= VV_FORCEINSMQ; 1910 error = insmntque(vp, mp); 1911 if (error != 0) { 1912 uma_zfree_smr(uma_inode, ip); 1913 *vpp = NULL; 1914 return (error); 1915 } 1916 vp->v_vflag &= ~VV_FORCEINSMQ; 1917 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1918 if (error != 0) 1919 return (error); 1920 if (*vpp != NULL) { 1921 /* 1922 * Calls from ffs_valloc() (i.e. FFSV_REPLACE set) 1923 * operate on empty inode, which must not be found by 1924 * other threads until fully filled. Vnode for empty 1925 * inode must be not re-inserted on the hash by other 1926 * thread, after removal by us at the beginning. 1927 */ 1928 MPASS((ffs_flags & FFSV_REPLACE) == 0); 1929 return (0); 1930 } 1931 if (I_IS_UFS1(ip)) 1932 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1933 else 1934 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1935 1936 if ((ffs_flags & FFSV_NEWINODE) != 0) { 1937 /* New inode, just zero out its contents. */ 1938 if (I_IS_UFS1(ip)) 1939 memset(ip->i_din1, 0, sizeof(struct ufs1_dinode)); 1940 else 1941 memset(ip->i_din2, 0, sizeof(struct ufs2_dinode)); 1942 } else { 1943 /* Read the disk contents for the inode, copy into the inode. */ 1944 dbn = fsbtodb(fs, ino_to_fsba(fs, ino)); 1945 error = ffs_breadz(ump, ump->um_devvp, dbn, dbn, 1946 (int)fs->fs_bsize, NULL, NULL, 0, NOCRED, 0, NULL, &bp); 1947 if (error != 0) { 1948 /* 1949 * The inode does not contain anything useful, so it 1950 * would be misleading to leave it on its hash chain. 1951 * With mode still zero, it will be unlinked and 1952 * returned to the free list by vput(). 1953 */ 1954 vgone(vp); 1955 vput(vp); 1956 *vpp = NULL; 1957 return (error); 1958 } 1959 if ((error = ffs_load_inode(bp, ip, fs, ino)) != 0) { 1960 bqrelse(bp); 1961 vgone(vp); 1962 vput(vp); 1963 *vpp = NULL; 1964 return (error); 1965 } 1966 bqrelse(bp); 1967 } 1968 if (DOINGSOFTDEP(vp) && (!fs->fs_ronly || 1969 (ffs_flags & FFSV_FORCEINODEDEP) != 0)) 1970 softdep_load_inodeblock(ip); 1971 else 1972 ip->i_effnlink = ip->i_nlink; 1973 1974 /* 1975 * Initialize the vnode from the inode, check for aliases. 1976 * Note that the underlying vnode may have changed. 1977 */ 1978 error = ufs_vinit(mp, I_IS_UFS1(ip) ? &ffs_fifoops1 : &ffs_fifoops2, 1979 &vp); 1980 if (error) { 1981 vgone(vp); 1982 vput(vp); 1983 *vpp = NULL; 1984 return (error); 1985 } 1986 1987 /* 1988 * Finish inode initialization. 1989 */ 1990 if (vp->v_type != VFIFO) { 1991 /* FFS supports shared locking for all files except fifos. */ 1992 VN_LOCK_ASHARE(vp); 1993 } 1994 1995 /* 1996 * Set up a generation number for this inode if it does not 1997 * already have one. This should only happen on old filesystems. 1998 */ 1999 if (ip->i_gen == 0) { 2000 while (ip->i_gen == 0) 2001 ip->i_gen = arc4random(); 2002 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 2003 UFS_INODE_SET_FLAG(ip, IN_MODIFIED); 2004 DIP_SET(ip, i_gen, ip->i_gen); 2005 } 2006 } 2007 #ifdef MAC 2008 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 2009 /* 2010 * If this vnode is already allocated, and we're running 2011 * multi-label, attempt to perform a label association 2012 * from the extended attributes on the inode. 2013 */ 2014 error = mac_vnode_associate_extattr(mp, vp); 2015 if (error) { 2016 /* ufs_inactive will release ip->i_devvp ref. */ 2017 vgone(vp); 2018 vput(vp); 2019 *vpp = NULL; 2020 return (error); 2021 } 2022 } 2023 #endif 2024 2025 vn_set_state(vp, VSTATE_CONSTRUCTED); 2026 *vpp = vp; 2027 return (0); 2028 } 2029 2030 /* 2031 * File handle to vnode 2032 * 2033 * Have to be really careful about stale file handles: 2034 * - check that the inode number is valid 2035 * - for UFS2 check that the inode number is initialized 2036 * - call ffs_vget() to get the locked inode 2037 * - check for an unallocated inode (i_mode == 0) 2038 * - check that the given client host has export rights and return 2039 * those rights via. exflagsp and credanonp 2040 */ 2041 static int 2042 ffs_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 2043 { 2044 struct ufid *ufhp; 2045 2046 ufhp = (struct ufid *)fhp; 2047 return (ffs_inotovp(mp, ufhp->ufid_ino, ufhp->ufid_gen, flags, 2048 vpp, 0)); 2049 } 2050 2051 /* 2052 * Return a vnode from a mounted filesystem for inode with specified 2053 * generation number. Return ESTALE if the inode with given generation 2054 * number no longer exists on that filesystem. 2055 */ 2056 int 2057 ffs_inotovp(struct mount *mp, 2058 ino_t ino, 2059 uint64_t gen, 2060 int lflags, 2061 struct vnode **vpp, 2062 int ffs_flags) 2063 { 2064 struct ufsmount *ump; 2065 struct vnode *nvp; 2066 struct inode *ip; 2067 struct fs *fs; 2068 struct cg *cgp; 2069 struct buf *bp; 2070 uint64_t cg; 2071 2072 ump = VFSTOUFS(mp); 2073 fs = ump->um_fs; 2074 *vpp = NULL; 2075 2076 if (ino < UFS_ROOTINO || ino >= fs->fs_ncg * fs->fs_ipg) 2077 return (ESTALE); 2078 2079 /* 2080 * Need to check if inode is initialized because UFS2 does lazy 2081 * initialization and nfs_fhtovp can offer arbitrary inode numbers. 2082 */ 2083 if (fs->fs_magic == FS_UFS2_MAGIC) { 2084 cg = ino_to_cg(fs, ino); 2085 if (ffs_getcg(fs, ump->um_devvp, cg, 0, &bp, &cgp) != 0) 2086 return (ESTALE); 2087 if (ino >= cg * fs->fs_ipg + cgp->cg_initediblk) { 2088 brelse(bp); 2089 return (ESTALE); 2090 } 2091 brelse(bp); 2092 } 2093 2094 if (ffs_vgetf(mp, ino, lflags, &nvp, ffs_flags) != 0) 2095 return (ESTALE); 2096 2097 ip = VTOI(nvp); 2098 if (ip->i_mode == 0 || ip->i_gen != gen || ip->i_effnlink <= 0) { 2099 if (ip->i_mode == 0) 2100 vgone(nvp); 2101 vput(nvp); 2102 return (ESTALE); 2103 } 2104 2105 vnode_create_vobject(nvp, DIP(ip, i_size), curthread); 2106 *vpp = nvp; 2107 return (0); 2108 } 2109 2110 /* 2111 * Initialize the filesystem. 2112 */ 2113 static int 2114 ffs_init(struct vfsconf *vfsp) 2115 { 2116 2117 ffs_susp_initialize(); 2118 softdep_initialize(); 2119 return (ufs_init(vfsp)); 2120 } 2121 2122 /* 2123 * Undo the work of ffs_init(). 2124 */ 2125 static int 2126 ffs_uninit(struct vfsconf *vfsp) 2127 { 2128 int ret; 2129 2130 ret = ufs_uninit(vfsp); 2131 softdep_uninitialize(); 2132 ffs_susp_uninitialize(); 2133 taskqueue_drain_all(taskqueue_thread); 2134 return (ret); 2135 } 2136 2137 /* 2138 * Structure used to pass information from ffs_sbupdate to its 2139 * helper routine ffs_use_bwrite. 2140 */ 2141 struct devfd { 2142 struct ufsmount *ump; 2143 struct buf *sbbp; 2144 int waitfor; 2145 int suspended; 2146 int error; 2147 }; 2148 2149 /* 2150 * Write a superblock and associated information back to disk. 2151 */ 2152 int 2153 ffs_sbupdate(struct ufsmount *ump, int waitfor, int suspended) 2154 { 2155 struct fs *fs; 2156 struct buf *sbbp; 2157 struct devfd devfd; 2158 2159 fs = ump->um_fs; 2160 if (fs->fs_ronly == 1 && 2161 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 2162 (MNT_RDONLY | MNT_UPDATE)) 2163 panic("ffs_sbupdate: write read-only filesystem"); 2164 /* 2165 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 2166 */ 2167 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 2168 (int)fs->fs_sbsize, 0, 0, 0); 2169 /* 2170 * Initialize info needed for write function. 2171 */ 2172 devfd.ump = ump; 2173 devfd.sbbp = sbbp; 2174 devfd.waitfor = waitfor; 2175 devfd.suspended = suspended; 2176 devfd.error = 0; 2177 return (ffs_sbput(&devfd, fs, fs->fs_sblockloc, ffs_use_bwrite)); 2178 } 2179 2180 /* 2181 * Write function for use by filesystem-layer routines. 2182 */ 2183 static int 2184 ffs_use_bwrite(void *devfd, off_t loc, void *buf, int size) 2185 { 2186 struct devfd *devfdp; 2187 struct ufsmount *ump; 2188 struct buf *bp; 2189 struct fs *fs; 2190 int error; 2191 2192 devfdp = devfd; 2193 ump = devfdp->ump; 2194 fs = ump->um_fs; 2195 /* 2196 * Writing the superblock summary information. 2197 */ 2198 if (loc != fs->fs_sblockloc) { 2199 bp = getblk(ump->um_devvp, btodb(loc), size, 0, 0, 0); 2200 bcopy(buf, bp->b_data, (uint64_t)size); 2201 if (devfdp->suspended) 2202 bp->b_flags |= B_VALIDSUSPWRT; 2203 if (devfdp->waitfor != MNT_WAIT) 2204 bawrite(bp); 2205 else if ((error = bwrite(bp)) != 0) 2206 devfdp->error = error; 2207 return (0); 2208 } 2209 /* 2210 * Writing the superblock itself. We need to do special checks for it. 2211 */ 2212 bp = devfdp->sbbp; 2213 if (ffs_fsfail_cleanup(ump, devfdp->error)) 2214 devfdp->error = 0; 2215 if (devfdp->error != 0) { 2216 brelse(bp); 2217 return (devfdp->error); 2218 } 2219 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 2220 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 2221 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 2222 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 2223 fs->fs_sblockloc = SBLOCK_UFS1; 2224 } 2225 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 2226 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 2227 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 2228 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 2229 fs->fs_sblockloc = SBLOCK_UFS2; 2230 } 2231 if (MOUNTEDSOFTDEP(ump->um_mountp)) 2232 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 2233 UFS_LOCK(ump); 2234 bcopy((caddr_t)fs, bp->b_data, (uint64_t)fs->fs_sbsize); 2235 UFS_UNLOCK(ump); 2236 fs = (struct fs *)bp->b_data; 2237 fs->fs_fmod = 0; 2238 ffs_oldfscompat_write(fs, ump); 2239 fs->fs_si = NULL; 2240 /* Recalculate the superblock hash */ 2241 fs->fs_ckhash = ffs_calc_sbhash(fs); 2242 if (devfdp->suspended) 2243 bp->b_flags |= B_VALIDSUSPWRT; 2244 if (devfdp->waitfor != MNT_WAIT) 2245 bawrite(bp); 2246 else if ((error = bwrite(bp)) != 0) 2247 devfdp->error = error; 2248 return (devfdp->error); 2249 } 2250 2251 static int 2252 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 2253 int attrnamespace, const char *attrname) 2254 { 2255 2256 #ifdef UFS_EXTATTR 2257 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 2258 attrname)); 2259 #else 2260 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 2261 attrname)); 2262 #endif 2263 } 2264 2265 static void 2266 ffs_ifree(struct ufsmount *ump, struct inode *ip) 2267 { 2268 2269 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 2270 uma_zfree(uma_ufs1, ip->i_din1); 2271 else if (ip->i_din2 != NULL) 2272 uma_zfree(uma_ufs2, ip->i_din2); 2273 uma_zfree_smr(uma_inode, ip); 2274 } 2275 2276 static int dobkgrdwrite = 1; 2277 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 2278 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 2279 2280 /* 2281 * Complete a background write started from bwrite. 2282 */ 2283 static void 2284 ffs_backgroundwritedone(struct buf *bp) 2285 { 2286 struct bufobj *bufobj; 2287 struct buf *origbp; 2288 2289 #ifdef SOFTUPDATES 2290 if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) != 0) 2291 softdep_handle_error(bp); 2292 #endif 2293 2294 /* 2295 * Find the original buffer that we are writing. 2296 */ 2297 bufobj = bp->b_bufobj; 2298 BO_LOCK(bufobj); 2299 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 2300 panic("backgroundwritedone: lost buffer"); 2301 2302 /* 2303 * We should mark the cylinder group buffer origbp as 2304 * dirty, to not lose the failed write. 2305 */ 2306 if ((bp->b_ioflags & BIO_ERROR) != 0) 2307 origbp->b_vflags |= BV_BKGRDERR; 2308 BO_UNLOCK(bufobj); 2309 /* 2310 * Process dependencies then return any unfinished ones. 2311 */ 2312 if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) == 0) 2313 buf_complete(bp); 2314 #ifdef SOFTUPDATES 2315 if (!LIST_EMPTY(&bp->b_dep)) 2316 softdep_move_dependencies(bp, origbp); 2317 #endif 2318 /* 2319 * This buffer is marked B_NOCACHE so when it is released 2320 * by biodone it will be tossed. Clear B_IOSTARTED in case of error. 2321 */ 2322 bp->b_flags |= B_NOCACHE; 2323 bp->b_flags &= ~(B_CACHE | B_IOSTARTED); 2324 pbrelvp(bp); 2325 2326 /* 2327 * Prevent brelse() from trying to keep and re-dirtying bp on 2328 * errors. It causes b_bufobj dereference in 2329 * bdirty()/reassignbuf(), and b_bufobj was cleared in 2330 * pbrelvp() above. 2331 */ 2332 if ((bp->b_ioflags & BIO_ERROR) != 0) 2333 bp->b_flags |= B_INVAL; 2334 bufdone(bp); 2335 BO_LOCK(bufobj); 2336 /* 2337 * Clear the BV_BKGRDINPROG flag in the original buffer 2338 * and awaken it if it is waiting for the write to complete. 2339 * If BV_BKGRDINPROG is not set in the original buffer it must 2340 * have been released and re-instantiated - which is not legal. 2341 */ 2342 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2343 ("backgroundwritedone: lost buffer2")); 2344 origbp->b_vflags &= ~BV_BKGRDINPROG; 2345 if (origbp->b_vflags & BV_BKGRDWAIT) { 2346 origbp->b_vflags &= ~BV_BKGRDWAIT; 2347 wakeup(&origbp->b_xflags); 2348 } 2349 BO_UNLOCK(bufobj); 2350 } 2351 2352 /* 2353 * Write, release buffer on completion. (Done by iodone 2354 * if async). Do not bother writing anything if the buffer 2355 * is invalid. 2356 * 2357 * Note that we set B_CACHE here, indicating that buffer is 2358 * fully valid and thus cacheable. This is true even of NFS 2359 * now so we set it generally. This could be set either here 2360 * or in biodone() since the I/O is synchronous. We put it 2361 * here. 2362 */ 2363 static int 2364 ffs_bufwrite(struct buf *bp) 2365 { 2366 struct buf *newbp; 2367 struct cg *cgp; 2368 2369 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2370 if (bp->b_flags & B_INVAL) { 2371 brelse(bp); 2372 return (0); 2373 } 2374 2375 if (!BUF_ISLOCKED(bp)) 2376 panic("bufwrite: buffer is not busy???"); 2377 /* 2378 * If a background write is already in progress, delay 2379 * writing this block if it is asynchronous. Otherwise 2380 * wait for the background write to complete. 2381 */ 2382 BO_LOCK(bp->b_bufobj); 2383 if (bp->b_vflags & BV_BKGRDINPROG) { 2384 if (bp->b_flags & B_ASYNC) { 2385 BO_UNLOCK(bp->b_bufobj); 2386 bdwrite(bp); 2387 return (0); 2388 } 2389 bp->b_vflags |= BV_BKGRDWAIT; 2390 msleep(&bp->b_xflags, BO_LOCKPTR(bp->b_bufobj), PRIBIO, 2391 "bwrbg", 0); 2392 if (bp->b_vflags & BV_BKGRDINPROG) 2393 panic("bufwrite: still writing"); 2394 } 2395 bp->b_vflags &= ~BV_BKGRDERR; 2396 BO_UNLOCK(bp->b_bufobj); 2397 2398 /* 2399 * If this buffer is marked for background writing and we 2400 * do not have to wait for it, make a copy and write the 2401 * copy so as to leave this buffer ready for further use. 2402 * 2403 * This optimization eats a lot of memory. If we have a page 2404 * or buffer shortfall we can't do it. 2405 */ 2406 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2407 (bp->b_flags & B_ASYNC) && 2408 !vm_page_count_severe() && 2409 !buf_dirty_count_severe()) { 2410 KASSERT(bp->b_iodone == NULL, 2411 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2412 2413 /* get a new block */ 2414 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2415 if (newbp == NULL) 2416 goto normal_write; 2417 2418 KASSERT(buf_mapped(bp), ("Unmapped cg")); 2419 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2420 BO_LOCK(bp->b_bufobj); 2421 bp->b_vflags |= BV_BKGRDINPROG; 2422 BO_UNLOCK(bp->b_bufobj); 2423 newbp->b_xflags |= 2424 (bp->b_xflags & BX_FSPRIV) | BX_BKGRDMARKER; 2425 newbp->b_lblkno = bp->b_lblkno; 2426 newbp->b_blkno = bp->b_blkno; 2427 newbp->b_offset = bp->b_offset; 2428 newbp->b_iodone = ffs_backgroundwritedone; 2429 newbp->b_flags |= B_ASYNC; 2430 newbp->b_flags &= ~B_INVAL; 2431 pbgetvp(bp->b_vp, newbp); 2432 2433 #ifdef SOFTUPDATES 2434 /* 2435 * Move over the dependencies. If there are rollbacks, 2436 * leave the parent buffer dirtied as it will need to 2437 * be written again. 2438 */ 2439 if (LIST_EMPTY(&bp->b_dep) || 2440 softdep_move_dependencies(bp, newbp) == 0) 2441 bundirty(bp); 2442 #else 2443 bundirty(bp); 2444 #endif 2445 2446 /* 2447 * Initiate write on the copy, release the original. The 2448 * BKGRDINPROG flag prevents it from going away until 2449 * the background write completes. We have to recalculate 2450 * its check hash in case the buffer gets freed and then 2451 * reconstituted from the buffer cache during a later read. 2452 */ 2453 if ((bp->b_xflags & BX_CYLGRP) != 0) { 2454 cgp = (struct cg *)bp->b_data; 2455 cgp->cg_ckhash = 0; 2456 cgp->cg_ckhash = 2457 calculate_crc32c(~0L, bp->b_data, bp->b_bcount); 2458 } 2459 bqrelse(bp); 2460 bp = newbp; 2461 } else 2462 /* Mark the buffer clean */ 2463 bundirty(bp); 2464 2465 /* Let the normal bufwrite do the rest for us */ 2466 normal_write: 2467 /* 2468 * If we are writing a cylinder group, update its time. 2469 */ 2470 if ((bp->b_xflags & BX_CYLGRP) != 0) { 2471 cgp = (struct cg *)bp->b_data; 2472 cgp->cg_old_time = cgp->cg_time = time_second; 2473 } 2474 return (bufwrite(bp)); 2475 } 2476 2477 static void 2478 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2479 { 2480 struct vnode *vp; 2481 struct buf *tbp; 2482 int error, nocopy; 2483 2484 /* 2485 * This is the bufobj strategy for the private VCHR vnodes 2486 * used by FFS to access the underlying storage device. 2487 * We override the default bufobj strategy and thus bypass 2488 * VOP_STRATEGY() for these vnodes. 2489 */ 2490 vp = bo2vnode(bo); 2491 KASSERT(bp->b_vp == NULL || bp->b_vp->v_type != VCHR || 2492 bp->b_vp->v_rdev == NULL || 2493 bp->b_vp->v_rdev->si_mountpt == NULL || 2494 VFSTOUFS(bp->b_vp->v_rdev->si_mountpt) == NULL || 2495 vp == VFSTOUFS(bp->b_vp->v_rdev->si_mountpt)->um_devvp, 2496 ("ffs_geom_strategy() with wrong vp")); 2497 if (bp->b_iocmd == BIO_WRITE) { 2498 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2499 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2500 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2501 panic("ffs_geom_strategy: bad I/O"); 2502 nocopy = bp->b_flags & B_NOCOPY; 2503 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2504 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2505 vp->v_rdev->si_snapdata != NULL) { 2506 if ((bp->b_flags & B_CLUSTER) != 0) { 2507 runningbufwakeup(bp); 2508 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2509 b_cluster.cluster_entry) { 2510 error = ffs_copyonwrite(vp, tbp); 2511 if (error != 0 && 2512 error != EOPNOTSUPP) { 2513 bp->b_error = error; 2514 bp->b_ioflags |= BIO_ERROR; 2515 bp->b_flags &= ~B_BARRIER; 2516 bufdone(bp); 2517 return; 2518 } 2519 } 2520 (void)runningbufclaim(bp, bp->b_bufsize); 2521 } else { 2522 error = ffs_copyonwrite(vp, bp); 2523 if (error != 0 && error != EOPNOTSUPP) { 2524 bp->b_error = error; 2525 bp->b_ioflags |= BIO_ERROR; 2526 bp->b_flags &= ~B_BARRIER; 2527 bufdone(bp); 2528 return; 2529 } 2530 } 2531 } 2532 #ifdef SOFTUPDATES 2533 if ((bp->b_flags & B_CLUSTER) != 0) { 2534 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2535 b_cluster.cluster_entry) { 2536 if (!LIST_EMPTY(&tbp->b_dep)) 2537 buf_start(tbp); 2538 } 2539 } else { 2540 if (!LIST_EMPTY(&bp->b_dep)) 2541 buf_start(bp); 2542 } 2543 2544 #endif 2545 /* 2546 * Check for metadata that needs check-hashes and update them. 2547 */ 2548 switch (bp->b_xflags & BX_FSPRIV) { 2549 case BX_CYLGRP: 2550 ((struct cg *)bp->b_data)->cg_ckhash = 0; 2551 ((struct cg *)bp->b_data)->cg_ckhash = 2552 calculate_crc32c(~0L, bp->b_data, bp->b_bcount); 2553 break; 2554 2555 case BX_SUPERBLOCK: 2556 case BX_INODE: 2557 case BX_INDIR: 2558 case BX_DIR: 2559 printf("Check-hash write is unimplemented!!!\n"); 2560 break; 2561 2562 case 0: 2563 break; 2564 2565 default: 2566 printf("multiple buffer types 0x%b\n", 2567 (bp->b_xflags & BX_FSPRIV), PRINT_UFS_BUF_XFLAGS); 2568 break; 2569 } 2570 } 2571 if (bp->b_iocmd != BIO_READ && ffs_enxio_enable) 2572 bp->b_xflags |= BX_CVTENXIO; 2573 g_vfs_strategy(bo, bp); 2574 } 2575 2576 int 2577 ffs_own_mount(const struct mount *mp) 2578 { 2579 2580 if (mp->mnt_op == &ufs_vfsops) 2581 return (1); 2582 return (0); 2583 } 2584 2585 #ifdef DDB 2586 #ifdef SOFTUPDATES 2587 2588 /* defined in ffs_softdep.c */ 2589 extern void db_print_ffs(struct ufsmount *ump); 2590 2591 DB_SHOW_COMMAND(ffs, db_show_ffs) 2592 { 2593 struct mount *mp; 2594 struct ufsmount *ump; 2595 2596 if (have_addr) { 2597 ump = VFSTOUFS((struct mount *)addr); 2598 db_print_ffs(ump); 2599 return; 2600 } 2601 2602 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2603 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2604 db_print_ffs(VFSTOUFS(mp)); 2605 } 2606 } 2607 2608 #endif /* SOFTUPDATES */ 2609 #endif /* DDB */ 2610