Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/ufs/ffs/ffs_vfsops.c
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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: releng/10.1/sys/ufs/ffs/ffs_vfsops.c 282873 2015-05-13 22:52:35Z delphij $"); 34 35 #include "opt_quota.h" 36 #include "opt_ufs.h" 37 #include "opt_ffs.h" 38 #include "opt_ddb.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.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/ioccom.h> 53 #include <sys/malloc.h> 54 #include <sys/mutex.h> 55 #include <sys/rwlock.h> 56 57 #include <security/mac/mac_framework.h> 58 59 #include <ufs/ufs/extattr.h> 60 #include <ufs/ufs/gjournal.h> 61 #include <ufs/ufs/quota.h> 62 #include <ufs/ufs/ufsmount.h> 63 #include <ufs/ufs/inode.h> 64 #include <ufs/ufs/ufs_extern.h> 65 66 #include <ufs/ffs/fs.h> 67 #include <ufs/ffs/ffs_extern.h> 68 69 #include <vm/vm.h> 70 #include <vm/uma.h> 71 #include <vm/vm_page.h> 72 73 #include <geom/geom.h> 74 #include <geom/geom_vfs.h> 75 76 #include <ddb/ddb.h> 77 78 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 79 80 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 81 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 82 ufs2_daddr_t); 83 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 84 static int ffs_sync_lazy(struct mount *mp); 85 86 static vfs_init_t ffs_init; 87 static vfs_uninit_t ffs_uninit; 88 static vfs_extattrctl_t ffs_extattrctl; 89 static vfs_cmount_t ffs_cmount; 90 static vfs_unmount_t ffs_unmount; 91 static vfs_mount_t ffs_mount; 92 static vfs_statfs_t ffs_statfs; 93 static vfs_fhtovp_t ffs_fhtovp; 94 static vfs_sync_t ffs_sync; 95 96 static struct vfsops ufs_vfsops = { 97 .vfs_extattrctl = ffs_extattrctl, 98 .vfs_fhtovp = ffs_fhtovp, 99 .vfs_init = ffs_init, 100 .vfs_mount = ffs_mount, 101 .vfs_cmount = ffs_cmount, 102 .vfs_quotactl = ufs_quotactl, 103 .vfs_root = ufs_root, 104 .vfs_statfs = ffs_statfs, 105 .vfs_sync = ffs_sync, 106 .vfs_uninit = ffs_uninit, 107 .vfs_unmount = ffs_unmount, 108 .vfs_vget = ffs_vget, 109 .vfs_susp_clean = process_deferred_inactive, 110 }; 111 112 VFS_SET(ufs_vfsops, ufs, 0); 113 MODULE_VERSION(ufs, 1); 114 115 static b_strategy_t ffs_geom_strategy; 116 static b_write_t ffs_bufwrite; 117 118 static struct buf_ops ffs_ops = { 119 .bop_name = "FFS", 120 .bop_write = ffs_bufwrite, 121 .bop_strategy = ffs_geom_strategy, 122 .bop_sync = bufsync, 123 #ifdef NO_FFS_SNAPSHOT 124 .bop_bdflush = bufbdflush, 125 #else 126 .bop_bdflush = ffs_bdflush, 127 #endif 128 }; 129 130 /* 131 * Note that userquota and groupquota options are not currently used 132 * by UFS/FFS code and generally mount(8) does not pass those options 133 * from userland, but they can be passed by loader(8) via 134 * vfs.root.mountfrom.options. 135 */ 136 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 137 "noclusterw", "noexec", "export", "force", "from", "groupquota", 138 "multilabel", "nfsv4acls", "fsckpid", "snapshot", "nosuid", "suiddir", 139 "nosymfollow", "sync", "union", "userquota", NULL }; 140 141 static int 142 ffs_mount(struct mount *mp) 143 { 144 struct vnode *devvp; 145 struct thread *td; 146 struct ufsmount *ump = NULL; 147 struct fs *fs; 148 pid_t fsckpid = 0; 149 int error, flags; 150 uint64_t mntorflags; 151 accmode_t accmode; 152 struct nameidata ndp; 153 char *fspec; 154 155 td = curthread; 156 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 157 return (EINVAL); 158 if (uma_inode == NULL) { 159 uma_inode = uma_zcreate("FFS inode", 160 sizeof(struct inode), NULL, NULL, NULL, NULL, 161 UMA_ALIGN_PTR, 0); 162 uma_ufs1 = uma_zcreate("FFS1 dinode", 163 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 164 UMA_ALIGN_PTR, 0); 165 uma_ufs2 = uma_zcreate("FFS2 dinode", 166 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 167 UMA_ALIGN_PTR, 0); 168 } 169 170 vfs_deleteopt(mp->mnt_optnew, "groupquota"); 171 vfs_deleteopt(mp->mnt_optnew, "userquota"); 172 173 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 174 if (error) 175 return (error); 176 177 mntorflags = 0; 178 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 179 mntorflags |= MNT_ACLS; 180 181 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 182 mntorflags |= MNT_SNAPSHOT; 183 /* 184 * Once we have set the MNT_SNAPSHOT flag, do not 185 * persist "snapshot" in the options list. 186 */ 187 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 188 vfs_deleteopt(mp->mnt_opt, "snapshot"); 189 } 190 191 if (vfs_getopt(mp->mnt_optnew, "fsckpid", NULL, NULL) == 0 && 192 vfs_scanopt(mp->mnt_optnew, "fsckpid", "%d", &fsckpid) == 1) { 193 /* 194 * Once we have set the restricted PID, do not 195 * persist "fsckpid" in the options list. 196 */ 197 vfs_deleteopt(mp->mnt_optnew, "fsckpid"); 198 vfs_deleteopt(mp->mnt_opt, "fsckpid"); 199 if (mp->mnt_flag & MNT_UPDATE) { 200 if (VFSTOUFS(mp)->um_fs->fs_ronly == 0 && 201 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 202 vfs_mount_error(mp, 203 "Checker enable: Must be read-only"); 204 return (EINVAL); 205 } 206 } else if (vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) == 0) { 207 vfs_mount_error(mp, 208 "Checker enable: Must be read-only"); 209 return (EINVAL); 210 } 211 /* Set to -1 if we are done */ 212 if (fsckpid == 0) 213 fsckpid = -1; 214 } 215 216 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { 217 if (mntorflags & MNT_ACLS) { 218 vfs_mount_error(mp, 219 "\"acls\" and \"nfsv4acls\" options " 220 "are mutually exclusive"); 221 return (EINVAL); 222 } 223 mntorflags |= MNT_NFS4ACLS; 224 } 225 226 MNT_ILOCK(mp); 227 mp->mnt_flag |= mntorflags; 228 MNT_IUNLOCK(mp); 229 /* 230 * If updating, check whether changing from read-only to 231 * read/write; if there is no device name, that's all we do. 232 */ 233 if (mp->mnt_flag & MNT_UPDATE) { 234 ump = VFSTOUFS(mp); 235 fs = ump->um_fs; 236 devvp = ump->um_devvp; 237 if (fsckpid == -1 && ump->um_fsckpid > 0) { 238 if ((error = ffs_flushfiles(mp, WRITECLOSE, td)) != 0 || 239 (error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) 240 return (error); 241 DROP_GIANT(); 242 g_topology_lock(); 243 /* 244 * Return to normal read-only mode. 245 */ 246 error = g_access(ump->um_cp, 0, -1, 0); 247 g_topology_unlock(); 248 PICKUP_GIANT(); 249 ump->um_fsckpid = 0; 250 } 251 if (fs->fs_ronly == 0 && 252 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 253 /* 254 * Flush any dirty data and suspend filesystem. 255 */ 256 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 257 return (error); 258 error = vfs_write_suspend_umnt(mp); 259 if (error != 0) 260 return (error); 261 /* 262 * Check for and optionally get rid of files open 263 * for writing. 264 */ 265 flags = WRITECLOSE; 266 if (mp->mnt_flag & MNT_FORCE) 267 flags |= FORCECLOSE; 268 if (MOUNTEDSOFTDEP(mp)) { 269 error = softdep_flushfiles(mp, flags, td); 270 } else { 271 error = ffs_flushfiles(mp, flags, td); 272 } 273 if (error) { 274 vfs_write_resume(mp, 0); 275 return (error); 276 } 277 if (fs->fs_pendingblocks != 0 || 278 fs->fs_pendinginodes != 0) { 279 printf("WARNING: %s Update error: blocks %jd " 280 "files %d\n", fs->fs_fsmnt, 281 (intmax_t)fs->fs_pendingblocks, 282 fs->fs_pendinginodes); 283 fs->fs_pendingblocks = 0; 284 fs->fs_pendinginodes = 0; 285 } 286 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 287 fs->fs_clean = 1; 288 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 289 fs->fs_ronly = 0; 290 fs->fs_clean = 0; 291 vfs_write_resume(mp, 0); 292 return (error); 293 } 294 if (MOUNTEDSOFTDEP(mp)) 295 softdep_unmount(mp); 296 DROP_GIANT(); 297 g_topology_lock(); 298 /* 299 * Drop our write and exclusive access. 300 */ 301 g_access(ump->um_cp, 0, -1, -1); 302 g_topology_unlock(); 303 PICKUP_GIANT(); 304 fs->fs_ronly = 1; 305 MNT_ILOCK(mp); 306 mp->mnt_flag |= MNT_RDONLY; 307 MNT_IUNLOCK(mp); 308 /* 309 * Allow the writers to note that filesystem 310 * is ro now. 311 */ 312 vfs_write_resume(mp, 0); 313 } 314 if ((mp->mnt_flag & MNT_RELOAD) && 315 (error = ffs_reload(mp, td, 0)) != 0) 316 return (error); 317 if (fs->fs_ronly && 318 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 319 /* 320 * If we are running a checker, do not allow upgrade. 321 */ 322 if (ump->um_fsckpid > 0) { 323 vfs_mount_error(mp, 324 "Active checker, cannot upgrade to write"); 325 return (EINVAL); 326 } 327 /* 328 * If upgrade to read-write by non-root, then verify 329 * that user has necessary permissions on the device. 330 */ 331 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 332 error = VOP_ACCESS(devvp, VREAD | VWRITE, 333 td->td_ucred, td); 334 if (error) 335 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 336 if (error) { 337 VOP_UNLOCK(devvp, 0); 338 return (error); 339 } 340 VOP_UNLOCK(devvp, 0); 341 fs->fs_flags &= ~FS_UNCLEAN; 342 if (fs->fs_clean == 0) { 343 fs->fs_flags |= FS_UNCLEAN; 344 if ((mp->mnt_flag & MNT_FORCE) || 345 ((fs->fs_flags & 346 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 347 (fs->fs_flags & FS_DOSOFTDEP))) { 348 printf("WARNING: %s was not properly " 349 "dismounted\n", fs->fs_fsmnt); 350 } else { 351 vfs_mount_error(mp, 352 "R/W mount of %s denied. %s.%s", 353 fs->fs_fsmnt, 354 "Filesystem is not clean - run fsck", 355 (fs->fs_flags & FS_SUJ) == 0 ? "" : 356 " Forced mount will invalidate" 357 " journal contents"); 358 return (EPERM); 359 } 360 } 361 DROP_GIANT(); 362 g_topology_lock(); 363 /* 364 * Request exclusive write access. 365 */ 366 error = g_access(ump->um_cp, 0, 1, 1); 367 g_topology_unlock(); 368 PICKUP_GIANT(); 369 if (error) 370 return (error); 371 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 372 return (error); 373 fs->fs_ronly = 0; 374 MNT_ILOCK(mp); 375 mp->mnt_flag &= ~MNT_RDONLY; 376 MNT_IUNLOCK(mp); 377 fs->fs_mtime = time_second; 378 /* check to see if we need to start softdep */ 379 if ((fs->fs_flags & FS_DOSOFTDEP) && 380 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 381 vn_finished_write(mp); 382 return (error); 383 } 384 fs->fs_clean = 0; 385 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 386 vn_finished_write(mp); 387 return (error); 388 } 389 if (fs->fs_snapinum[0] != 0) 390 ffs_snapshot_mount(mp); 391 vn_finished_write(mp); 392 } 393 /* 394 * Soft updates is incompatible with "async", 395 * so if we are doing softupdates stop the user 396 * from setting the async flag in an update. 397 * Softdep_mount() clears it in an initial mount 398 * or ro->rw remount. 399 */ 400 if (MOUNTEDSOFTDEP(mp)) { 401 /* XXX: Reset too late ? */ 402 MNT_ILOCK(mp); 403 mp->mnt_flag &= ~MNT_ASYNC; 404 MNT_IUNLOCK(mp); 405 } 406 /* 407 * Keep MNT_ACLS flag if it is stored in superblock. 408 */ 409 if ((fs->fs_flags & FS_ACLS) != 0) { 410 /* XXX: Set too late ? */ 411 MNT_ILOCK(mp); 412 mp->mnt_flag |= MNT_ACLS; 413 MNT_IUNLOCK(mp); 414 } 415 416 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 417 /* XXX: Set too late ? */ 418 MNT_ILOCK(mp); 419 mp->mnt_flag |= MNT_NFS4ACLS; 420 MNT_IUNLOCK(mp); 421 } 422 /* 423 * If this is a request from fsck to clean up the filesystem, 424 * then allow the specified pid to proceed. 425 */ 426 if (fsckpid > 0) { 427 if (ump->um_fsckpid != 0) { 428 vfs_mount_error(mp, 429 "Active checker already running on %s", 430 fs->fs_fsmnt); 431 return (EINVAL); 432 } 433 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 434 ("soft updates enabled on read-only file system")); 435 DROP_GIANT(); 436 g_topology_lock(); 437 /* 438 * Request write access. 439 */ 440 error = g_access(ump->um_cp, 0, 1, 0); 441 g_topology_unlock(); 442 PICKUP_GIANT(); 443 if (error) { 444 vfs_mount_error(mp, 445 "Checker activation failed on %s", 446 fs->fs_fsmnt); 447 return (error); 448 } 449 ump->um_fsckpid = fsckpid; 450 if (fs->fs_snapinum[0] != 0) 451 ffs_snapshot_mount(mp); 452 fs->fs_mtime = time_second; 453 fs->fs_fmod = 1; 454 fs->fs_clean = 0; 455 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 456 } 457 458 /* 459 * If this is a snapshot request, take the snapshot. 460 */ 461 if (mp->mnt_flag & MNT_SNAPSHOT) 462 return (ffs_snapshot(mp, fspec)); 463 } 464 465 /* 466 * Not an update, or updating the name: look up the name 467 * and verify that it refers to a sensible disk device. 468 */ 469 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 470 if ((error = namei(&ndp)) != 0) 471 return (error); 472 NDFREE(&ndp, NDF_ONLY_PNBUF); 473 devvp = ndp.ni_vp; 474 if (!vn_isdisk(devvp, &error)) { 475 vput(devvp); 476 return (error); 477 } 478 479 /* 480 * If mount by non-root, then verify that user has necessary 481 * permissions on the device. 482 */ 483 accmode = VREAD; 484 if ((mp->mnt_flag & MNT_RDONLY) == 0) 485 accmode |= VWRITE; 486 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 487 if (error) 488 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 489 if (error) { 490 vput(devvp); 491 return (error); 492 } 493 494 if (mp->mnt_flag & MNT_UPDATE) { 495 /* 496 * Update only 497 * 498 * If it's not the same vnode, or at least the same device 499 * then it's not correct. 500 */ 501 502 if (devvp->v_rdev != ump->um_devvp->v_rdev) 503 error = EINVAL; /* needs translation */ 504 vput(devvp); 505 if (error) 506 return (error); 507 } else { 508 /* 509 * New mount 510 * 511 * We need the name for the mount point (also used for 512 * "last mounted on") copied in. If an error occurs, 513 * the mount point is discarded by the upper level code. 514 * Note that vfs_mount() populates f_mntonname for us. 515 */ 516 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 517 vrele(devvp); 518 return (error); 519 } 520 if (fsckpid > 0) { 521 KASSERT(MOUNTEDSOFTDEP(mp) == 0, 522 ("soft updates enabled on read-only file system")); 523 ump = VFSTOUFS(mp); 524 fs = ump->um_fs; 525 DROP_GIANT(); 526 g_topology_lock(); 527 /* 528 * Request write access. 529 */ 530 error = g_access(ump->um_cp, 0, 1, 0); 531 g_topology_unlock(); 532 PICKUP_GIANT(); 533 if (error) { 534 printf("WARNING: %s: Checker activation " 535 "failed\n", fs->fs_fsmnt); 536 } else { 537 ump->um_fsckpid = fsckpid; 538 if (fs->fs_snapinum[0] != 0) 539 ffs_snapshot_mount(mp); 540 fs->fs_mtime = time_second; 541 fs->fs_clean = 0; 542 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 543 } 544 } 545 } 546 vfs_mountedfrom(mp, fspec); 547 return (0); 548 } 549 550 /* 551 * Compatibility with old mount system call. 552 */ 553 554 static int 555 ffs_cmount(struct mntarg *ma, void *data, uint64_t flags) 556 { 557 struct ufs_args args; 558 struct export_args exp; 559 int error; 560 561 if (data == NULL) 562 return (EINVAL); 563 error = copyin(data, &args, sizeof args); 564 if (error) 565 return (error); 566 vfs_oexport_conv(&args.export, &exp); 567 568 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 569 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 570 error = kernel_mount(ma, flags); 571 572 return (error); 573 } 574 575 /* 576 * Reload all incore data for a filesystem (used after running fsck on 577 * the root filesystem and finding things to fix). If the 'force' flag 578 * is 0, the filesystem must be mounted read-only. 579 * 580 * Things to do to update the mount: 581 * 1) invalidate all cached meta-data. 582 * 2) re-read superblock from disk. 583 * 3) re-read summary information from disk. 584 * 4) invalidate all inactive vnodes. 585 * 5) invalidate all cached file data. 586 * 6) re-read inode data for all active vnodes. 587 */ 588 int 589 ffs_reload(struct mount *mp, struct thread *td, int force) 590 { 591 struct vnode *vp, *mvp, *devvp; 592 struct inode *ip; 593 void *space; 594 struct buf *bp; 595 struct fs *fs, *newfs; 596 struct ufsmount *ump; 597 ufs2_daddr_t sblockloc; 598 int i, blks, size, error; 599 int32_t *lp; 600 601 ump = VFSTOUFS(mp); 602 603 MNT_ILOCK(mp); 604 if ((mp->mnt_flag & MNT_RDONLY) == 0 && force == 0) { 605 MNT_IUNLOCK(mp); 606 return (EINVAL); 607 } 608 MNT_IUNLOCK(mp); 609 610 /* 611 * Step 1: invalidate all cached meta-data. 612 */ 613 devvp = VFSTOUFS(mp)->um_devvp; 614 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 615 if (vinvalbuf(devvp, 0, 0, 0) != 0) 616 panic("ffs_reload: dirty1"); 617 VOP_UNLOCK(devvp, 0); 618 619 /* 620 * Step 2: re-read superblock from disk. 621 */ 622 fs = VFSTOUFS(mp)->um_fs; 623 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 624 NOCRED, &bp)) != 0) 625 return (error); 626 newfs = (struct fs *)bp->b_data; 627 if ((newfs->fs_magic != FS_UFS1_MAGIC && 628 newfs->fs_magic != FS_UFS2_MAGIC) || 629 newfs->fs_bsize > MAXBSIZE || 630 newfs->fs_bsize < sizeof(struct fs)) { 631 brelse(bp); 632 return (EIO); /* XXX needs translation */ 633 } 634 /* 635 * Copy pointer fields back into superblock before copying in XXX 636 * new superblock. These should really be in the ufsmount. XXX 637 * Note that important parameters (eg fs_ncg) are unchanged. 638 */ 639 newfs->fs_csp = fs->fs_csp; 640 newfs->fs_maxcluster = fs->fs_maxcluster; 641 newfs->fs_contigdirs = fs->fs_contigdirs; 642 newfs->fs_active = fs->fs_active; 643 newfs->fs_ronly = fs->fs_ronly; 644 sblockloc = fs->fs_sblockloc; 645 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 646 brelse(bp); 647 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 648 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 649 UFS_LOCK(ump); 650 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 651 printf("WARNING: %s: reload pending error: blocks %jd " 652 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 653 fs->fs_pendinginodes); 654 fs->fs_pendingblocks = 0; 655 fs->fs_pendinginodes = 0; 656 } 657 UFS_UNLOCK(ump); 658 659 /* 660 * Step 3: re-read summary information from disk. 661 */ 662 size = fs->fs_cssize; 663 blks = howmany(size, fs->fs_fsize); 664 if (fs->fs_contigsumsize > 0) 665 size += fs->fs_ncg * sizeof(int32_t); 666 size += fs->fs_ncg * sizeof(u_int8_t); 667 free(fs->fs_csp, M_UFSMNT); 668 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 669 fs->fs_csp = space; 670 for (i = 0; i < blks; i += fs->fs_frag) { 671 size = fs->fs_bsize; 672 if (i + fs->fs_frag > blks) 673 size = (blks - i) * fs->fs_fsize; 674 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 675 NOCRED, &bp); 676 if (error) 677 return (error); 678 bcopy(bp->b_data, space, (u_int)size); 679 space = (char *)space + size; 680 brelse(bp); 681 } 682 /* 683 * We no longer know anything about clusters per cylinder group. 684 */ 685 if (fs->fs_contigsumsize > 0) { 686 fs->fs_maxcluster = lp = space; 687 for (i = 0; i < fs->fs_ncg; i++) 688 *lp++ = fs->fs_contigsumsize; 689 space = lp; 690 } 691 size = fs->fs_ncg * sizeof(u_int8_t); 692 fs->fs_contigdirs = (u_int8_t *)space; 693 bzero(fs->fs_contigdirs, size); 694 695 loop: 696 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 697 /* 698 * Skip syncer vnode. 699 */ 700 if (vp->v_type == VNON) { 701 VI_UNLOCK(vp); 702 continue; 703 } 704 /* 705 * Step 4: invalidate all cached file data. 706 */ 707 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 708 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 709 goto loop; 710 } 711 if (vinvalbuf(vp, 0, 0, 0)) 712 panic("ffs_reload: dirty2"); 713 /* 714 * Step 5: re-read inode data for all active vnodes. 715 */ 716 ip = VTOI(vp); 717 error = 718 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 719 (int)fs->fs_bsize, NOCRED, &bp); 720 if (error) { 721 VOP_UNLOCK(vp, 0); 722 vrele(vp); 723 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 724 return (error); 725 } 726 ffs_load_inode(bp, ip, fs, ip->i_number); 727 ip->i_effnlink = ip->i_nlink; 728 brelse(bp); 729 VOP_UNLOCK(vp, 0); 730 vrele(vp); 731 } 732 return (0); 733 } 734 735 /* 736 * Possible superblock locations ordered from most to least likely. 737 */ 738 static int sblock_try[] = SBLOCKSEARCH; 739 740 /* 741 * Common code for mount and mountroot 742 */ 743 static int 744 ffs_mountfs(devvp, mp, td) 745 struct vnode *devvp; 746 struct mount *mp; 747 struct thread *td; 748 { 749 struct ufsmount *ump; 750 struct buf *bp; 751 struct fs *fs; 752 struct cdev *dev; 753 void *space; 754 ufs2_daddr_t sblockloc; 755 int error, i, blks, size, ronly; 756 int32_t *lp; 757 struct ucred *cred; 758 struct g_consumer *cp; 759 struct mount *nmp; 760 761 bp = NULL; 762 ump = NULL; 763 cred = td ? td->td_ucred : NOCRED; 764 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 765 766 dev = devvp->v_rdev; 767 dev_ref(dev); 768 DROP_GIANT(); 769 g_topology_lock(); 770 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 771 g_topology_unlock(); 772 PICKUP_GIANT(); 773 VOP_UNLOCK(devvp, 0); 774 if (error) 775 goto out; 776 if (devvp->v_rdev->si_iosize_max != 0) 777 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 778 if (mp->mnt_iosize_max > MAXPHYS) 779 mp->mnt_iosize_max = MAXPHYS; 780 781 devvp->v_bufobj.bo_ops = &ffs_ops; 782 783 fs = NULL; 784 sblockloc = 0; 785 /* 786 * Try reading the superblock in each of its possible locations. 787 */ 788 for (i = 0; sblock_try[i] != -1; i++) { 789 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 790 error = EINVAL; 791 vfs_mount_error(mp, 792 "Invalid sectorsize %d for superblock size %d", 793 cp->provider->sectorsize, SBLOCKSIZE); 794 goto out; 795 } 796 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 797 cred, &bp)) != 0) 798 goto out; 799 fs = (struct fs *)bp->b_data; 800 sblockloc = sblock_try[i]; 801 if ((fs->fs_magic == FS_UFS1_MAGIC || 802 (fs->fs_magic == FS_UFS2_MAGIC && 803 (fs->fs_sblockloc == sblockloc || 804 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 805 fs->fs_bsize <= MAXBSIZE && 806 fs->fs_bsize >= sizeof(struct fs)) 807 break; 808 brelse(bp); 809 bp = NULL; 810 } 811 if (sblock_try[i] == -1) { 812 error = EINVAL; /* XXX needs translation */ 813 goto out; 814 } 815 fs->fs_fmod = 0; 816 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 817 fs->fs_flags &= ~FS_UNCLEAN; 818 if (fs->fs_clean == 0) { 819 fs->fs_flags |= FS_UNCLEAN; 820 if (ronly || (mp->mnt_flag & MNT_FORCE) || 821 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 822 (fs->fs_flags & FS_DOSOFTDEP))) { 823 printf("WARNING: %s was not properly dismounted\n", 824 fs->fs_fsmnt); 825 } else { 826 vfs_mount_error(mp, "R/W mount of %s denied. %s%s", 827 fs->fs_fsmnt, "Filesystem is not clean - run fsck.", 828 (fs->fs_flags & FS_SUJ) == 0 ? "" : 829 " Forced mount will invalidate journal contents"); 830 error = EPERM; 831 goto out; 832 } 833 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 834 (mp->mnt_flag & MNT_FORCE)) { 835 printf("WARNING: %s: lost blocks %jd files %d\n", 836 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 837 fs->fs_pendinginodes); 838 fs->fs_pendingblocks = 0; 839 fs->fs_pendinginodes = 0; 840 } 841 } 842 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 843 printf("WARNING: %s: mount pending error: blocks %jd " 844 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 845 fs->fs_pendinginodes); 846 fs->fs_pendingblocks = 0; 847 fs->fs_pendinginodes = 0; 848 } 849 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 850 #ifdef UFS_GJOURNAL 851 /* 852 * Get journal provider name. 853 */ 854 size = 1024; 855 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 856 if (g_io_getattr("GJOURNAL::provider", cp, &size, 857 mp->mnt_gjprovider) == 0) { 858 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 859 M_UFSMNT, M_WAITOK); 860 MNT_ILOCK(mp); 861 mp->mnt_flag |= MNT_GJOURNAL; 862 MNT_IUNLOCK(mp); 863 } else { 864 printf("WARNING: %s: GJOURNAL flag on fs " 865 "but no gjournal provider below\n", 866 mp->mnt_stat.f_mntonname); 867 free(mp->mnt_gjprovider, M_UFSMNT); 868 mp->mnt_gjprovider = NULL; 869 } 870 #else 871 printf("WARNING: %s: GJOURNAL flag on fs but no " 872 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); 873 #endif 874 } else { 875 mp->mnt_gjprovider = NULL; 876 } 877 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 878 ump->um_cp = cp; 879 ump->um_bo = &devvp->v_bufobj; 880 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 881 if (fs->fs_magic == FS_UFS1_MAGIC) { 882 ump->um_fstype = UFS1; 883 ump->um_balloc = ffs_balloc_ufs1; 884 } else { 885 ump->um_fstype = UFS2; 886 ump->um_balloc = ffs_balloc_ufs2; 887 } 888 ump->um_blkatoff = ffs_blkatoff; 889 ump->um_truncate = ffs_truncate; 890 ump->um_update = ffs_update; 891 ump->um_valloc = ffs_valloc; 892 ump->um_vfree = ffs_vfree; 893 ump->um_ifree = ffs_ifree; 894 ump->um_rdonly = ffs_rdonly; 895 ump->um_snapgone = ffs_snapgone; 896 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 897 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 898 if (fs->fs_sbsize < SBLOCKSIZE) 899 bp->b_flags |= B_INVAL | B_NOCACHE; 900 brelse(bp); 901 bp = NULL; 902 fs = ump->um_fs; 903 ffs_oldfscompat_read(fs, ump, sblockloc); 904 fs->fs_ronly = ronly; 905 size = fs->fs_cssize; 906 blks = howmany(size, fs->fs_fsize); 907 if (fs->fs_contigsumsize > 0) 908 size += fs->fs_ncg * sizeof(int32_t); 909 size += fs->fs_ncg * sizeof(u_int8_t); 910 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 911 fs->fs_csp = space; 912 for (i = 0; i < blks; i += fs->fs_frag) { 913 size = fs->fs_bsize; 914 if (i + fs->fs_frag > blks) 915 size = (blks - i) * fs->fs_fsize; 916 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 917 cred, &bp)) != 0) { 918 free(fs->fs_csp, M_UFSMNT); 919 goto out; 920 } 921 bcopy(bp->b_data, space, (u_int)size); 922 space = (char *)space + size; 923 brelse(bp); 924 bp = NULL; 925 } 926 if (fs->fs_contigsumsize > 0) { 927 fs->fs_maxcluster = lp = space; 928 for (i = 0; i < fs->fs_ncg; i++) 929 *lp++ = fs->fs_contigsumsize; 930 space = lp; 931 } 932 size = fs->fs_ncg * sizeof(u_int8_t); 933 fs->fs_contigdirs = (u_int8_t *)space; 934 bzero(fs->fs_contigdirs, size); 935 fs->fs_active = NULL; 936 mp->mnt_data = ump; 937 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 938 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 939 nmp = NULL; 940 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 941 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 942 if (nmp) 943 vfs_rel(nmp); 944 vfs_getnewfsid(mp); 945 } 946 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 947 MNT_ILOCK(mp); 948 mp->mnt_flag |= MNT_LOCAL; 949 MNT_IUNLOCK(mp); 950 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 951 #ifdef MAC 952 MNT_ILOCK(mp); 953 mp->mnt_flag |= MNT_MULTILABEL; 954 MNT_IUNLOCK(mp); 955 #else 956 printf("WARNING: %s: multilabel flag on fs but " 957 "no MAC support\n", mp->mnt_stat.f_mntonname); 958 #endif 959 } 960 if ((fs->fs_flags & FS_ACLS) != 0) { 961 #ifdef UFS_ACL 962 MNT_ILOCK(mp); 963 964 if (mp->mnt_flag & MNT_NFS4ACLS) 965 printf("WARNING: %s: ACLs flag on fs conflicts with " 966 "\"nfsv4acls\" mount option; option ignored\n", 967 mp->mnt_stat.f_mntonname); 968 mp->mnt_flag &= ~MNT_NFS4ACLS; 969 mp->mnt_flag |= MNT_ACLS; 970 971 MNT_IUNLOCK(mp); 972 #else 973 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 974 mp->mnt_stat.f_mntonname); 975 #endif 976 } 977 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 978 #ifdef UFS_ACL 979 MNT_ILOCK(mp); 980 981 if (mp->mnt_flag & MNT_ACLS) 982 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " 983 "with \"acls\" mount option; option ignored\n", 984 mp->mnt_stat.f_mntonname); 985 mp->mnt_flag &= ~MNT_ACLS; 986 mp->mnt_flag |= MNT_NFS4ACLS; 987 988 MNT_IUNLOCK(mp); 989 #else 990 printf("WARNING: %s: NFSv4 ACLs flag on fs but no " 991 "ACLs support\n", mp->mnt_stat.f_mntonname); 992 #endif 993 } 994 if ((fs->fs_flags & FS_TRIM) != 0) { 995 size = sizeof(int); 996 if (g_io_getattr("GEOM::candelete", cp, &size, 997 &ump->um_candelete) == 0) { 998 if (!ump->um_candelete) 999 printf("WARNING: %s: TRIM flag on fs but disk " 1000 "does not support TRIM\n", 1001 mp->mnt_stat.f_mntonname); 1002 } else { 1003 printf("WARNING: %s: TRIM flag on fs but disk does " 1004 "not confirm that it supports TRIM\n", 1005 mp->mnt_stat.f_mntonname); 1006 ump->um_candelete = 0; 1007 } 1008 } 1009 1010 ump->um_mountp = mp; 1011 ump->um_dev = dev; 1012 ump->um_devvp = devvp; 1013 ump->um_nindir = fs->fs_nindir; 1014 ump->um_bptrtodb = fs->fs_fsbtodb; 1015 ump->um_seqinc = fs->fs_frag; 1016 for (i = 0; i < MAXQUOTAS; i++) 1017 ump->um_quotas[i] = NULLVP; 1018 #ifdef UFS_EXTATTR 1019 ufs_extattr_uepm_init(&ump->um_extattr); 1020 #endif 1021 /* 1022 * Set FS local "last mounted on" information (NULL pad) 1023 */ 1024 bzero(fs->fs_fsmnt, MAXMNTLEN); 1025 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 1026 mp->mnt_stat.f_iosize = fs->fs_bsize; 1027 1028 if (mp->mnt_flag & MNT_ROOTFS) { 1029 /* 1030 * Root mount; update timestamp in mount structure. 1031 * this will be used by the common root mount code 1032 * to update the system clock. 1033 */ 1034 mp->mnt_time = fs->fs_time; 1035 } 1036 1037 if (ronly == 0) { 1038 fs->fs_mtime = time_second; 1039 if ((fs->fs_flags & FS_DOSOFTDEP) && 1040 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 1041 free(fs->fs_csp, M_UFSMNT); 1042 ffs_flushfiles(mp, FORCECLOSE, td); 1043 goto out; 1044 } 1045 if (devvp->v_type == VCHR && devvp->v_rdev != NULL) 1046 devvp->v_rdev->si_mountpt = mp; 1047 if (fs->fs_snapinum[0] != 0) 1048 ffs_snapshot_mount(mp); 1049 fs->fs_fmod = 1; 1050 fs->fs_clean = 0; 1051 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 1052 } 1053 /* 1054 * Initialize filesystem stat information in mount struct. 1055 */ 1056 MNT_ILOCK(mp); 1057 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED | 1058 MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS; 1059 MNT_IUNLOCK(mp); 1060 #ifdef UFS_EXTATTR 1061 #ifdef UFS_EXTATTR_AUTOSTART 1062 /* 1063 * 1064 * Auto-starting does the following: 1065 * - check for /.attribute in the fs, and extattr_start if so 1066 * - for each file in .attribute, enable that file with 1067 * an attribute of the same name. 1068 * Not clear how to report errors -- probably eat them. 1069 * This would all happen while the filesystem was busy/not 1070 * available, so would effectively be "atomic". 1071 */ 1072 (void) ufs_extattr_autostart(mp, td); 1073 #endif /* !UFS_EXTATTR_AUTOSTART */ 1074 #endif /* !UFS_EXTATTR */ 1075 return (0); 1076 out: 1077 if (bp) 1078 brelse(bp); 1079 if (cp != NULL) { 1080 DROP_GIANT(); 1081 g_topology_lock(); 1082 g_vfs_close(cp); 1083 g_topology_unlock(); 1084 PICKUP_GIANT(); 1085 } 1086 if (ump) { 1087 mtx_destroy(UFS_MTX(ump)); 1088 if (mp->mnt_gjprovider != NULL) { 1089 free(mp->mnt_gjprovider, M_UFSMNT); 1090 mp->mnt_gjprovider = NULL; 1091 } 1092 free(ump->um_fs, M_UFSMNT); 1093 free(ump, M_UFSMNT); 1094 mp->mnt_data = NULL; 1095 } 1096 dev_rel(dev); 1097 return (error); 1098 } 1099 1100 #include <sys/sysctl.h> 1101 static int bigcgs = 0; 1102 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1103 1104 /* 1105 * Sanity checks for loading old filesystem superblocks. 1106 * See ffs_oldfscompat_write below for unwound actions. 1107 * 1108 * XXX - Parts get retired eventually. 1109 * Unfortunately new bits get added. 1110 */ 1111 static void 1112 ffs_oldfscompat_read(fs, ump, sblockloc) 1113 struct fs *fs; 1114 struct ufsmount *ump; 1115 ufs2_daddr_t sblockloc; 1116 { 1117 off_t maxfilesize; 1118 1119 /* 1120 * If not yet done, update fs_flags location and value of fs_sblockloc. 1121 */ 1122 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1123 fs->fs_flags = fs->fs_old_flags; 1124 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1125 fs->fs_sblockloc = sblockloc; 1126 } 1127 /* 1128 * If not yet done, update UFS1 superblock with new wider fields. 1129 */ 1130 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1131 fs->fs_maxbsize = fs->fs_bsize; 1132 fs->fs_time = fs->fs_old_time; 1133 fs->fs_size = fs->fs_old_size; 1134 fs->fs_dsize = fs->fs_old_dsize; 1135 fs->fs_csaddr = fs->fs_old_csaddr; 1136 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1137 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1138 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1139 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1140 } 1141 if (fs->fs_magic == FS_UFS1_MAGIC && 1142 fs->fs_old_inodefmt < FS_44INODEFMT) { 1143 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1144 fs->fs_qbmask = ~fs->fs_bmask; 1145 fs->fs_qfmask = ~fs->fs_fmask; 1146 } 1147 if (fs->fs_magic == FS_UFS1_MAGIC) { 1148 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1149 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1150 if (fs->fs_maxfilesize > maxfilesize) 1151 fs->fs_maxfilesize = maxfilesize; 1152 } 1153 /* Compatibility for old filesystems */ 1154 if (fs->fs_avgfilesize <= 0) 1155 fs->fs_avgfilesize = AVFILESIZ; 1156 if (fs->fs_avgfpdir <= 0) 1157 fs->fs_avgfpdir = AFPDIR; 1158 if (bigcgs) { 1159 fs->fs_save_cgsize = fs->fs_cgsize; 1160 fs->fs_cgsize = fs->fs_bsize; 1161 } 1162 } 1163 1164 /* 1165 * Unwinding superblock updates for old filesystems. 1166 * See ffs_oldfscompat_read above for details. 1167 * 1168 * XXX - Parts get retired eventually. 1169 * Unfortunately new bits get added. 1170 */ 1171 void 1172 ffs_oldfscompat_write(fs, ump) 1173 struct fs *fs; 1174 struct ufsmount *ump; 1175 { 1176 1177 /* 1178 * Copy back UFS2 updated fields that UFS1 inspects. 1179 */ 1180 if (fs->fs_magic == FS_UFS1_MAGIC) { 1181 fs->fs_old_time = fs->fs_time; 1182 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1183 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1184 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1185 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1186 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1187 } 1188 if (bigcgs) { 1189 fs->fs_cgsize = fs->fs_save_cgsize; 1190 fs->fs_save_cgsize = 0; 1191 } 1192 } 1193 1194 /* 1195 * unmount system call 1196 */ 1197 static int 1198 ffs_unmount(mp, mntflags) 1199 struct mount *mp; 1200 int mntflags; 1201 { 1202 struct thread *td; 1203 struct ufsmount *ump = VFSTOUFS(mp); 1204 struct fs *fs; 1205 int error, flags, susp; 1206 #ifdef UFS_EXTATTR 1207 int e_restart; 1208 #endif 1209 1210 flags = 0; 1211 td = curthread; 1212 fs = ump->um_fs; 1213 susp = 0; 1214 if (mntflags & MNT_FORCE) { 1215 flags |= FORCECLOSE; 1216 susp = fs->fs_ronly == 0; 1217 } 1218 #ifdef UFS_EXTATTR 1219 if ((error = ufs_extattr_stop(mp, td))) { 1220 if (error != EOPNOTSUPP) 1221 printf("WARNING: unmount %s: ufs_extattr_stop " 1222 "returned errno %d\n", mp->mnt_stat.f_mntonname, 1223 error); 1224 e_restart = 0; 1225 } else { 1226 ufs_extattr_uepm_destroy(&ump->um_extattr); 1227 e_restart = 1; 1228 } 1229 #endif 1230 if (susp) { 1231 error = vfs_write_suspend_umnt(mp); 1232 if (error != 0) 1233 goto fail1; 1234 } 1235 if (MOUNTEDSOFTDEP(mp)) 1236 error = softdep_flushfiles(mp, flags, td); 1237 else 1238 error = ffs_flushfiles(mp, flags, td); 1239 if (error != 0 && error != ENXIO) 1240 goto fail; 1241 1242 UFS_LOCK(ump); 1243 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1244 printf("WARNING: unmount %s: pending error: blocks %jd " 1245 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1246 fs->fs_pendinginodes); 1247 fs->fs_pendingblocks = 0; 1248 fs->fs_pendinginodes = 0; 1249 } 1250 UFS_UNLOCK(ump); 1251 if (MOUNTEDSOFTDEP(mp)) 1252 softdep_unmount(mp); 1253 if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) { 1254 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1255 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1256 if (error && error != ENXIO) { 1257 fs->fs_clean = 0; 1258 goto fail; 1259 } 1260 } 1261 if (susp) 1262 vfs_write_resume(mp, VR_START_WRITE); 1263 DROP_GIANT(); 1264 g_topology_lock(); 1265 if (ump->um_fsckpid > 0) { 1266 /* 1267 * Return to normal read-only mode. 1268 */ 1269 error = g_access(ump->um_cp, 0, -1, 0); 1270 ump->um_fsckpid = 0; 1271 } 1272 g_vfs_close(ump->um_cp); 1273 g_topology_unlock(); 1274 PICKUP_GIANT(); 1275 if (ump->um_devvp->v_type == VCHR && ump->um_devvp->v_rdev != NULL) 1276 ump->um_devvp->v_rdev->si_mountpt = NULL; 1277 vrele(ump->um_devvp); 1278 dev_rel(ump->um_dev); 1279 mtx_destroy(UFS_MTX(ump)); 1280 if (mp->mnt_gjprovider != NULL) { 1281 free(mp->mnt_gjprovider, M_UFSMNT); 1282 mp->mnt_gjprovider = NULL; 1283 } 1284 free(fs->fs_csp, M_UFSMNT); 1285 free(fs, M_UFSMNT); 1286 free(ump, M_UFSMNT); 1287 mp->mnt_data = NULL; 1288 MNT_ILOCK(mp); 1289 mp->mnt_flag &= ~MNT_LOCAL; 1290 MNT_IUNLOCK(mp); 1291 return (error); 1292 1293 fail: 1294 if (susp) 1295 vfs_write_resume(mp, VR_START_WRITE); 1296 fail1: 1297 #ifdef UFS_EXTATTR 1298 if (e_restart) { 1299 ufs_extattr_uepm_init(&ump->um_extattr); 1300 #ifdef UFS_EXTATTR_AUTOSTART 1301 (void) ufs_extattr_autostart(mp, td); 1302 #endif 1303 } 1304 #endif 1305 1306 return (error); 1307 } 1308 1309 /* 1310 * Flush out all the files in a filesystem. 1311 */ 1312 int 1313 ffs_flushfiles(mp, flags, td) 1314 struct mount *mp; 1315 int flags; 1316 struct thread *td; 1317 { 1318 struct ufsmount *ump; 1319 int qerror, error; 1320 1321 ump = VFSTOUFS(mp); 1322 qerror = 0; 1323 #ifdef QUOTA 1324 if (mp->mnt_flag & MNT_QUOTA) { 1325 int i; 1326 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1327 if (error) 1328 return (error); 1329 for (i = 0; i < MAXQUOTAS; i++) { 1330 error = quotaoff(td, mp, i); 1331 if (error != 0) { 1332 if ((flags & EARLYFLUSH) == 0) 1333 return (error); 1334 else 1335 qerror = error; 1336 } 1337 } 1338 1339 /* 1340 * Here we fall through to vflush again to ensure that 1341 * we have gotten rid of all the system vnodes, unless 1342 * quotas must not be closed. 1343 */ 1344 } 1345 #endif 1346 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1347 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1348 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1349 return (error); 1350 ffs_snapshot_unmount(mp); 1351 flags |= FORCECLOSE; 1352 /* 1353 * Here we fall through to vflush again to ensure 1354 * that we have gotten rid of all the system vnodes. 1355 */ 1356 } 1357 1358 /* 1359 * Do not close system files if quotas were not closed, to be 1360 * able to sync the remaining dquots. The freeblks softupdate 1361 * workitems might hold a reference on a dquot, preventing 1362 * quotaoff() from completing. Next round of 1363 * softdep_flushworklist() iteration should process the 1364 * blockers, allowing the next run of quotaoff() to finally 1365 * flush held dquots. 1366 * 1367 * Otherwise, flush all the files. 1368 */ 1369 if (qerror == 0 && (error = vflush(mp, 0, flags, td)) != 0) 1370 return (error); 1371 1372 /* 1373 * Flush filesystem metadata. 1374 */ 1375 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1376 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1377 VOP_UNLOCK(ump->um_devvp, 0); 1378 return (error); 1379 } 1380 1381 /* 1382 * Get filesystem statistics. 1383 */ 1384 static int 1385 ffs_statfs(mp, sbp) 1386 struct mount *mp; 1387 struct statfs *sbp; 1388 { 1389 struct ufsmount *ump; 1390 struct fs *fs; 1391 1392 ump = VFSTOUFS(mp); 1393 fs = ump->um_fs; 1394 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1395 panic("ffs_statfs"); 1396 sbp->f_version = STATFS_VERSION; 1397 sbp->f_bsize = fs->fs_fsize; 1398 sbp->f_iosize = fs->fs_bsize; 1399 sbp->f_blocks = fs->fs_dsize; 1400 UFS_LOCK(ump); 1401 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1402 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1403 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1404 dbtofsb(fs, fs->fs_pendingblocks); 1405 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1406 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1407 UFS_UNLOCK(ump); 1408 sbp->f_namemax = NAME_MAX; 1409 return (0); 1410 } 1411 1412 /* 1413 * For a lazy sync, we only care about access times, quotas and the 1414 * superblock. Other filesystem changes are already converted to 1415 * cylinder group blocks or inode blocks updates and are written to 1416 * disk by syncer. 1417 */ 1418 static int 1419 ffs_sync_lazy(mp) 1420 struct mount *mp; 1421 { 1422 struct vnode *mvp, *vp; 1423 struct inode *ip; 1424 struct thread *td; 1425 int allerror, error; 1426 1427 allerror = 0; 1428 td = curthread; 1429 if ((mp->mnt_flag & MNT_NOATIME) != 0) 1430 goto qupdate; 1431 MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) { 1432 if (vp->v_type == VNON) { 1433 VI_UNLOCK(vp); 1434 continue; 1435 } 1436 ip = VTOI(vp); 1437 1438 /* 1439 * The IN_ACCESS flag is converted to IN_MODIFIED by 1440 * ufs_close() and ufs_getattr() by the calls to 1441 * ufs_itimes_locked(), without subsequent UFS_UPDATE(). 1442 * Test also all the other timestamp flags too, to pick up 1443 * any other cases that could be missed. 1444 */ 1445 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 1446 IN_UPDATE)) == 0) { 1447 VI_UNLOCK(vp); 1448 continue; 1449 } 1450 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, 1451 td)) != 0) 1452 continue; 1453 error = ffs_update(vp, 0); 1454 if (error != 0) 1455 allerror = error; 1456 vput(vp); 1457 } 1458 1459 qupdate: 1460 #ifdef QUOTA 1461 qsync(mp); 1462 #endif 1463 1464 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && 1465 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) 1466 allerror = error; 1467 return (allerror); 1468 } 1469 1470 /* 1471 * Go through the disk queues to initiate sandbagged IO; 1472 * go through the inodes to write those that have been modified; 1473 * initiate the writing of the super block if it has been modified. 1474 * 1475 * Note: we are always called with the filesystem marked busy using 1476 * vfs_busy(). 1477 */ 1478 static int 1479 ffs_sync(mp, waitfor) 1480 struct mount *mp; 1481 int waitfor; 1482 { 1483 struct vnode *mvp, *vp, *devvp; 1484 struct thread *td; 1485 struct inode *ip; 1486 struct ufsmount *ump = VFSTOUFS(mp); 1487 struct fs *fs; 1488 int error, count, wait, lockreq, allerror = 0; 1489 int suspend; 1490 int suspended; 1491 int secondary_writes; 1492 int secondary_accwrites; 1493 int softdep_deps; 1494 int softdep_accdeps; 1495 struct bufobj *bo; 1496 1497 wait = 0; 1498 suspend = 0; 1499 suspended = 0; 1500 td = curthread; 1501 fs = ump->um_fs; 1502 if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0) 1503 panic("%s: ffs_sync: modification on read-only filesystem", 1504 fs->fs_fsmnt); 1505 if (waitfor == MNT_LAZY) { 1506 if (!rebooting) 1507 return (ffs_sync_lazy(mp)); 1508 waitfor = MNT_NOWAIT; 1509 } 1510 1511 /* 1512 * Write back each (modified) inode. 1513 */ 1514 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1515 if (waitfor == MNT_SUSPEND) { 1516 suspend = 1; 1517 waitfor = MNT_WAIT; 1518 } 1519 if (waitfor == MNT_WAIT) { 1520 wait = 1; 1521 lockreq = LK_EXCLUSIVE; 1522 } 1523 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1524 loop: 1525 /* Grab snapshot of secondary write counts */ 1526 MNT_ILOCK(mp); 1527 secondary_writes = mp->mnt_secondary_writes; 1528 secondary_accwrites = mp->mnt_secondary_accwrites; 1529 MNT_IUNLOCK(mp); 1530 1531 /* Grab snapshot of softdep dependency counts */ 1532 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1533 1534 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1535 /* 1536 * Depend on the vnode interlock to keep things stable enough 1537 * for a quick test. Since there might be hundreds of 1538 * thousands of vnodes, we cannot afford even a subroutine 1539 * call unless there's a good chance that we have work to do. 1540 */ 1541 if (vp->v_type == VNON) { 1542 VI_UNLOCK(vp); 1543 continue; 1544 } 1545 ip = VTOI(vp); 1546 if ((ip->i_flag & 1547 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1548 vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1549 VI_UNLOCK(vp); 1550 continue; 1551 } 1552 if ((error = vget(vp, lockreq, td)) != 0) { 1553 if (error == ENOENT || error == ENOLCK) { 1554 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1555 goto loop; 1556 } 1557 continue; 1558 } 1559 if ((error = ffs_syncvnode(vp, waitfor, 0)) != 0) 1560 allerror = error; 1561 vput(vp); 1562 } 1563 /* 1564 * Force stale filesystem control information to be flushed. 1565 */ 1566 if (waitfor == MNT_WAIT || rebooting) { 1567 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1568 allerror = error; 1569 /* Flushed work items may create new vnodes to clean */ 1570 if (allerror == 0 && count) 1571 goto loop; 1572 } 1573 #ifdef QUOTA 1574 qsync(mp); 1575 #endif 1576 1577 devvp = ump->um_devvp; 1578 bo = &devvp->v_bufobj; 1579 BO_LOCK(bo); 1580 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { 1581 BO_UNLOCK(bo); 1582 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1583 error = VOP_FSYNC(devvp, waitfor, td); 1584 VOP_UNLOCK(devvp, 0); 1585 if (MOUNTEDSOFTDEP(mp) && (error == 0 || error == EAGAIN)) 1586 error = ffs_sbupdate(ump, waitfor, 0); 1587 if (error != 0) 1588 allerror = error; 1589 if (allerror == 0 && waitfor == MNT_WAIT) 1590 goto loop; 1591 } else if (suspend != 0) { 1592 if (softdep_check_suspend(mp, 1593 devvp, 1594 softdep_deps, 1595 softdep_accdeps, 1596 secondary_writes, 1597 secondary_accwrites) != 0) { 1598 MNT_IUNLOCK(mp); 1599 goto loop; /* More work needed */ 1600 } 1601 mtx_assert(MNT_MTX(mp), MA_OWNED); 1602 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1603 MNT_IUNLOCK(mp); 1604 suspended = 1; 1605 } else 1606 BO_UNLOCK(bo); 1607 /* 1608 * Write back modified superblock. 1609 */ 1610 if (fs->fs_fmod != 0 && 1611 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1612 allerror = error; 1613 return (allerror); 1614 } 1615 1616 int 1617 ffs_vget(mp, ino, flags, vpp) 1618 struct mount *mp; 1619 ino_t ino; 1620 int flags; 1621 struct vnode **vpp; 1622 { 1623 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1624 } 1625 1626 int 1627 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1628 struct mount *mp; 1629 ino_t ino; 1630 int flags; 1631 struct vnode **vpp; 1632 int ffs_flags; 1633 { 1634 struct fs *fs; 1635 struct inode *ip; 1636 struct ufsmount *ump; 1637 struct buf *bp; 1638 struct vnode *vp; 1639 struct cdev *dev; 1640 int error; 1641 1642 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1643 if (error || *vpp != NULL) 1644 return (error); 1645 1646 /* 1647 * We must promote to an exclusive lock for vnode creation. This 1648 * can happen if lookup is passed LOCKSHARED. 1649 */ 1650 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1651 flags &= ~LK_TYPE_MASK; 1652 flags |= LK_EXCLUSIVE; 1653 } 1654 1655 /* 1656 * We do not lock vnode creation as it is believed to be too 1657 * expensive for such rare case as simultaneous creation of vnode 1658 * for same ino by different processes. We just allow them to race 1659 * and check later to decide who wins. Let the race begin! 1660 */ 1661 1662 ump = VFSTOUFS(mp); 1663 dev = ump->um_dev; 1664 fs = ump->um_fs; 1665 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1666 1667 /* Allocate a new vnode/inode. */ 1668 if (fs->fs_magic == FS_UFS1_MAGIC) 1669 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1670 else 1671 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1672 if (error) { 1673 *vpp = NULL; 1674 uma_zfree(uma_inode, ip); 1675 return (error); 1676 } 1677 /* 1678 * FFS supports recursive locking. 1679 */ 1680 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1681 VN_LOCK_AREC(vp); 1682 vp->v_data = ip; 1683 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1684 ip->i_vnode = vp; 1685 ip->i_ump = ump; 1686 ip->i_fs = fs; 1687 ip->i_dev = dev; 1688 ip->i_number = ino; 1689 ip->i_ea_refs = 0; 1690 #ifdef QUOTA 1691 { 1692 int i; 1693 for (i = 0; i < MAXQUOTAS; i++) 1694 ip->i_dquot[i] = NODQUOT; 1695 } 1696 #endif 1697 1698 if (ffs_flags & FFSV_FORCEINSMQ) 1699 vp->v_vflag |= VV_FORCEINSMQ; 1700 error = insmntque(vp, mp); 1701 if (error != 0) { 1702 uma_zfree(uma_inode, ip); 1703 *vpp = NULL; 1704 return (error); 1705 } 1706 vp->v_vflag &= ~VV_FORCEINSMQ; 1707 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1708 if (error || *vpp != NULL) 1709 return (error); 1710 1711 /* Read in the disk contents for the inode, copy into the inode. */ 1712 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1713 (int)fs->fs_bsize, NOCRED, &bp); 1714 if (error) { 1715 /* 1716 * The inode does not contain anything useful, so it would 1717 * be misleading to leave it on its hash chain. With mode 1718 * still zero, it will be unlinked and returned to the free 1719 * list by vput(). 1720 */ 1721 brelse(bp); 1722 vput(vp); 1723 *vpp = NULL; 1724 return (error); 1725 } 1726 if (ip->i_ump->um_fstype == UFS1) 1727 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1728 else 1729 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1730 ffs_load_inode(bp, ip, fs, ino); 1731 if (DOINGSOFTDEP(vp)) 1732 softdep_load_inodeblock(ip); 1733 else 1734 ip->i_effnlink = ip->i_nlink; 1735 bqrelse(bp); 1736 1737 /* 1738 * Initialize the vnode from the inode, check for aliases. 1739 * Note that the underlying vnode may have changed. 1740 */ 1741 if (ip->i_ump->um_fstype == UFS1) 1742 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1743 else 1744 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1745 if (error) { 1746 vput(vp); 1747 *vpp = NULL; 1748 return (error); 1749 } 1750 1751 /* 1752 * Finish inode initialization. 1753 */ 1754 if (vp->v_type != VFIFO) { 1755 /* FFS supports shared locking for all files except fifos. */ 1756 VN_LOCK_ASHARE(vp); 1757 } 1758 1759 /* 1760 * Set up a generation number for this inode if it does not 1761 * already have one. This should only happen on old filesystems. 1762 */ 1763 if (ip->i_gen == 0) { 1764 ip->i_gen = arc4random() / 2 + 1; 1765 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1766 ip->i_flag |= IN_MODIFIED; 1767 DIP_SET(ip, i_gen, ip->i_gen); 1768 } 1769 } 1770 #ifdef MAC 1771 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1772 /* 1773 * If this vnode is already allocated, and we're running 1774 * multi-label, attempt to perform a label association 1775 * from the extended attributes on the inode. 1776 */ 1777 error = mac_vnode_associate_extattr(mp, vp); 1778 if (error) { 1779 /* ufs_inactive will release ip->i_devvp ref. */ 1780 vput(vp); 1781 *vpp = NULL; 1782 return (error); 1783 } 1784 } 1785 #endif 1786 1787 *vpp = vp; 1788 return (0); 1789 } 1790 1791 /* 1792 * File handle to vnode 1793 * 1794 * Have to be really careful about stale file handles: 1795 * - check that the inode number is valid 1796 * - call ffs_vget() to get the locked inode 1797 * - check for an unallocated inode (i_mode == 0) 1798 * - check that the given client host has export rights and return 1799 * those rights via. exflagsp and credanonp 1800 */ 1801 static int 1802 ffs_fhtovp(mp, fhp, flags, vpp) 1803 struct mount *mp; 1804 struct fid *fhp; 1805 int flags; 1806 struct vnode **vpp; 1807 { 1808 struct ufid *ufhp; 1809 struct fs *fs; 1810 1811 ufhp = (struct ufid *)fhp; 1812 fs = VFSTOUFS(mp)->um_fs; 1813 if (ufhp->ufid_ino < ROOTINO || 1814 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1815 return (ESTALE); 1816 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1817 } 1818 1819 /* 1820 * Initialize the filesystem. 1821 */ 1822 static int 1823 ffs_init(vfsp) 1824 struct vfsconf *vfsp; 1825 { 1826 1827 ffs_susp_initialize(); 1828 softdep_initialize(); 1829 return (ufs_init(vfsp)); 1830 } 1831 1832 /* 1833 * Undo the work of ffs_init(). 1834 */ 1835 static int 1836 ffs_uninit(vfsp) 1837 struct vfsconf *vfsp; 1838 { 1839 int ret; 1840 1841 ret = ufs_uninit(vfsp); 1842 softdep_uninitialize(); 1843 ffs_susp_uninitialize(); 1844 return (ret); 1845 } 1846 1847 /* 1848 * Write a superblock and associated information back to disk. 1849 */ 1850 int 1851 ffs_sbupdate(ump, waitfor, suspended) 1852 struct ufsmount *ump; 1853 int waitfor; 1854 int suspended; 1855 { 1856 struct fs *fs = ump->um_fs; 1857 struct buf *sbbp; 1858 struct buf *bp; 1859 int blks; 1860 void *space; 1861 int i, size, error, allerror = 0; 1862 1863 if (fs->fs_ronly == 1 && 1864 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1865 (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0) 1866 panic("ffs_sbupdate: write read-only filesystem"); 1867 /* 1868 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1869 */ 1870 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), 1871 (int)fs->fs_sbsize, 0, 0, 0); 1872 /* 1873 * First write back the summary information. 1874 */ 1875 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1876 space = fs->fs_csp; 1877 for (i = 0; i < blks; i += fs->fs_frag) { 1878 size = fs->fs_bsize; 1879 if (i + fs->fs_frag > blks) 1880 size = (blks - i) * fs->fs_fsize; 1881 bp = getblk(ump->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1882 size, 0, 0, 0); 1883 bcopy(space, bp->b_data, (u_int)size); 1884 space = (char *)space + size; 1885 if (suspended) 1886 bp->b_flags |= B_VALIDSUSPWRT; 1887 if (waitfor != MNT_WAIT) 1888 bawrite(bp); 1889 else if ((error = bwrite(bp)) != 0) 1890 allerror = error; 1891 } 1892 /* 1893 * Now write back the superblock itself. If any errors occurred 1894 * up to this point, then fail so that the superblock avoids 1895 * being written out as clean. 1896 */ 1897 if (allerror) { 1898 brelse(sbbp); 1899 return (allerror); 1900 } 1901 bp = sbbp; 1902 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1903 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1904 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1905 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1906 fs->fs_sblockloc = SBLOCK_UFS1; 1907 } 1908 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1909 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1910 printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", 1911 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1912 fs->fs_sblockloc = SBLOCK_UFS2; 1913 } 1914 fs->fs_fmod = 0; 1915 fs->fs_time = time_second; 1916 if (MOUNTEDSOFTDEP(ump->um_mountp)) 1917 softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); 1918 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1919 ffs_oldfscompat_write((struct fs *)bp->b_data, ump); 1920 if (suspended) 1921 bp->b_flags |= B_VALIDSUSPWRT; 1922 if (waitfor != MNT_WAIT) 1923 bawrite(bp); 1924 else if ((error = bwrite(bp)) != 0) 1925 allerror = error; 1926 return (allerror); 1927 } 1928 1929 static int 1930 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1931 int attrnamespace, const char *attrname) 1932 { 1933 1934 #ifdef UFS_EXTATTR 1935 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1936 attrname)); 1937 #else 1938 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1939 attrname)); 1940 #endif 1941 } 1942 1943 static void 1944 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1945 { 1946 1947 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1948 uma_zfree(uma_ufs1, ip->i_din1); 1949 else if (ip->i_din2 != NULL) 1950 uma_zfree(uma_ufs2, ip->i_din2); 1951 uma_zfree(uma_inode, ip); 1952 } 1953 1954 static int dobkgrdwrite = 1; 1955 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1956 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1957 1958 /* 1959 * Complete a background write started from bwrite. 1960 */ 1961 static void 1962 ffs_backgroundwritedone(struct buf *bp) 1963 { 1964 struct bufobj *bufobj; 1965 struct buf *origbp; 1966 1967 /* 1968 * Find the original buffer that we are writing. 1969 */ 1970 bufobj = bp->b_bufobj; 1971 BO_LOCK(bufobj); 1972 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1973 panic("backgroundwritedone: lost buffer"); 1974 BO_UNLOCK(bufobj); 1975 /* 1976 * Process dependencies then return any unfinished ones. 1977 */ 1978 pbrelvp(bp); 1979 if (!LIST_EMPTY(&bp->b_dep)) 1980 buf_complete(bp); 1981 #ifdef SOFTUPDATES 1982 if (!LIST_EMPTY(&bp->b_dep)) 1983 softdep_move_dependencies(bp, origbp); 1984 #endif 1985 /* 1986 * This buffer is marked B_NOCACHE so when it is released 1987 * by biodone it will be tossed. 1988 */ 1989 bp->b_flags |= B_NOCACHE; 1990 bp->b_flags &= ~B_CACHE; 1991 bufdone(bp); 1992 BO_LOCK(bufobj); 1993 /* 1994 * Clear the BV_BKGRDINPROG flag in the original buffer 1995 * and awaken it if it is waiting for the write to complete. 1996 * If BV_BKGRDINPROG is not set in the original buffer it must 1997 * have been released and re-instantiated - which is not legal. 1998 */ 1999 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 2000 ("backgroundwritedone: lost buffer2")); 2001 origbp->b_vflags &= ~BV_BKGRDINPROG; 2002 if (origbp->b_vflags & BV_BKGRDWAIT) { 2003 origbp->b_vflags &= ~BV_BKGRDWAIT; 2004 wakeup(&origbp->b_xflags); 2005 } 2006 BO_UNLOCK(bufobj); 2007 } 2008 2009 2010 /* 2011 * Write, release buffer on completion. (Done by iodone 2012 * if async). Do not bother writing anything if the buffer 2013 * is invalid. 2014 * 2015 * Note that we set B_CACHE here, indicating that buffer is 2016 * fully valid and thus cacheable. This is true even of NFS 2017 * now so we set it generally. This could be set either here 2018 * or in biodone() since the I/O is synchronous. We put it 2019 * here. 2020 */ 2021 static int 2022 ffs_bufwrite(struct buf *bp) 2023 { 2024 struct buf *newbp; 2025 int oldflags; 2026 2027 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 2028 if (bp->b_flags & B_INVAL) { 2029 brelse(bp); 2030 return (0); 2031 } 2032 2033 oldflags = bp->b_flags; 2034 2035 if (!BUF_ISLOCKED(bp)) 2036 panic("bufwrite: buffer is not busy???"); 2037 /* 2038 * If a background write is already in progress, delay 2039 * writing this block if it is asynchronous. Otherwise 2040 * wait for the background write to complete. 2041 */ 2042 BO_LOCK(bp->b_bufobj); 2043 if (bp->b_vflags & BV_BKGRDINPROG) { 2044 if (bp->b_flags & B_ASYNC) { 2045 BO_UNLOCK(bp->b_bufobj); 2046 bdwrite(bp); 2047 return (0); 2048 } 2049 bp->b_vflags |= BV_BKGRDWAIT; 2050 msleep(&bp->b_xflags, BO_LOCKPTR(bp->b_bufobj), PRIBIO, 2051 "bwrbg", 0); 2052 if (bp->b_vflags & BV_BKGRDINPROG) 2053 panic("bufwrite: still writing"); 2054 } 2055 BO_UNLOCK(bp->b_bufobj); 2056 2057 /* 2058 * If this buffer is marked for background writing and we 2059 * do not have to wait for it, make a copy and write the 2060 * copy so as to leave this buffer ready for further use. 2061 * 2062 * This optimization eats a lot of memory. If we have a page 2063 * or buffer shortfall we can't do it. 2064 */ 2065 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 2066 (bp->b_flags & B_ASYNC) && 2067 !vm_page_count_severe() && 2068 !buf_dirty_count_severe()) { 2069 KASSERT(bp->b_iodone == NULL, 2070 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 2071 2072 /* get a new block */ 2073 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 2074 if (newbp == NULL) 2075 goto normal_write; 2076 2077 KASSERT((bp->b_flags & B_UNMAPPED) == 0, ("Unmapped cg")); 2078 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 2079 BO_LOCK(bp->b_bufobj); 2080 bp->b_vflags |= BV_BKGRDINPROG; 2081 BO_UNLOCK(bp->b_bufobj); 2082 newbp->b_xflags |= BX_BKGRDMARKER; 2083 newbp->b_lblkno = bp->b_lblkno; 2084 newbp->b_blkno = bp->b_blkno; 2085 newbp->b_offset = bp->b_offset; 2086 newbp->b_iodone = ffs_backgroundwritedone; 2087 newbp->b_flags |= B_ASYNC; 2088 newbp->b_flags &= ~B_INVAL; 2089 pbgetvp(bp->b_vp, newbp); 2090 2091 #ifdef SOFTUPDATES 2092 /* 2093 * Move over the dependencies. If there are rollbacks, 2094 * leave the parent buffer dirtied as it will need to 2095 * be written again. 2096 */ 2097 if (LIST_EMPTY(&bp->b_dep) || 2098 softdep_move_dependencies(bp, newbp) == 0) 2099 bundirty(bp); 2100 #else 2101 bundirty(bp); 2102 #endif 2103 2104 /* 2105 * Initiate write on the copy, release the original. The 2106 * BKGRDINPROG flag prevents it from going away until 2107 * the background write completes. 2108 */ 2109 bqrelse(bp); 2110 bp = newbp; 2111 } else 2112 /* Mark the buffer clean */ 2113 bundirty(bp); 2114 2115 2116 /* Let the normal bufwrite do the rest for us */ 2117 normal_write: 2118 return (bufwrite(bp)); 2119 } 2120 2121 2122 static void 2123 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 2124 { 2125 struct vnode *vp; 2126 int error; 2127 struct buf *tbp; 2128 int nocopy; 2129 2130 vp = bo->__bo_vnode; 2131 if (bp->b_iocmd == BIO_WRITE) { 2132 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 2133 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 2134 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 2135 panic("ffs_geom_strategy: bad I/O"); 2136 nocopy = bp->b_flags & B_NOCOPY; 2137 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 2138 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 2139 vp->v_rdev->si_snapdata != NULL) { 2140 if ((bp->b_flags & B_CLUSTER) != 0) { 2141 runningbufwakeup(bp); 2142 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2143 b_cluster.cluster_entry) { 2144 error = ffs_copyonwrite(vp, tbp); 2145 if (error != 0 && 2146 error != EOPNOTSUPP) { 2147 bp->b_error = error; 2148 bp->b_ioflags |= BIO_ERROR; 2149 bufdone(bp); 2150 return; 2151 } 2152 } 2153 bp->b_runningbufspace = bp->b_bufsize; 2154 atomic_add_long(&runningbufspace, 2155 bp->b_runningbufspace); 2156 } else { 2157 error = ffs_copyonwrite(vp, bp); 2158 if (error != 0 && error != EOPNOTSUPP) { 2159 bp->b_error = error; 2160 bp->b_ioflags |= BIO_ERROR; 2161 bufdone(bp); 2162 return; 2163 } 2164 } 2165 } 2166 #ifdef SOFTUPDATES 2167 if ((bp->b_flags & B_CLUSTER) != 0) { 2168 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2169 b_cluster.cluster_entry) { 2170 if (!LIST_EMPTY(&tbp->b_dep)) 2171 buf_start(tbp); 2172 } 2173 } else { 2174 if (!LIST_EMPTY(&bp->b_dep)) 2175 buf_start(bp); 2176 } 2177 2178 #endif 2179 } 2180 g_vfs_strategy(bo, bp); 2181 } 2182 2183 int 2184 ffs_own_mount(const struct mount *mp) 2185 { 2186 2187 if (mp->mnt_op == &ufs_vfsops) 2188 return (1); 2189 return (0); 2190 } 2191 2192 #ifdef DDB 2193 #ifdef SOFTUPDATES 2194 2195 /* defined in ffs_softdep.c */ 2196 extern void db_print_ffs(struct ufsmount *ump); 2197 2198 DB_SHOW_COMMAND(ffs, db_show_ffs) 2199 { 2200 struct mount *mp; 2201 struct ufsmount *ump; 2202 2203 if (have_addr) { 2204 ump = VFSTOUFS((struct mount *)addr); 2205 db_print_ffs(ump); 2206 return; 2207 } 2208 2209 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2210 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2211 db_print_ffs(VFSTOUFS(mp)); 2212 } 2213 } 2214 2215 #endif /* SOFTUPDATES */ 2216 #endif /* DDB */
Cache object: 76e54c33570f73bd244bd72130d55942
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