1 /*- 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_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/malloc.h> 53 #include <sys/mutex.h> 54 55 #include <security/mac/mac_framework.h> 56 57 #include <ufs/ufs/extattr.h> 58 #include <ufs/ufs/gjournal.h> 59 #include <ufs/ufs/quota.h> 60 #include <ufs/ufs/ufsmount.h> 61 #include <ufs/ufs/inode.h> 62 #include <ufs/ufs/ufs_extern.h> 63 64 #include <ufs/ffs/fs.h> 65 #include <ufs/ffs/ffs_extern.h> 66 67 #include <vm/vm.h> 68 #include <vm/uma.h> 69 #include <vm/vm_page.h> 70 71 #include <geom/geom.h> 72 #include <geom/geom_vfs.h> 73 74 #include <ddb/ddb.h> 75 76 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 77 78 static int ffs_reload(struct mount *, struct thread *); 79 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 80 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 81 ufs2_daddr_t); 82 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 83 static vfs_init_t ffs_init; 84 static vfs_uninit_t ffs_uninit; 85 static vfs_extattrctl_t ffs_extattrctl; 86 static vfs_cmount_t ffs_cmount; 87 static vfs_unmount_t ffs_unmount; 88 static vfs_mount_t ffs_mount; 89 static vfs_statfs_t ffs_statfs; 90 static vfs_fhtovp_t ffs_fhtovp; 91 static vfs_sync_t ffs_sync; 92 93 static struct vfsops ufs_vfsops = { 94 .vfs_extattrctl = ffs_extattrctl, 95 .vfs_fhtovp = ffs_fhtovp, 96 .vfs_init = ffs_init, 97 .vfs_mount = ffs_mount, 98 .vfs_cmount = ffs_cmount, 99 .vfs_quotactl = ufs_quotactl, 100 .vfs_root = ufs_root, 101 .vfs_statfs = ffs_statfs, 102 .vfs_sync = ffs_sync, 103 .vfs_uninit = ffs_uninit, 104 .vfs_unmount = ffs_unmount, 105 .vfs_vget = ffs_vget, 106 .vfs_susp_clean = process_deferred_inactive, 107 }; 108 109 VFS_SET(ufs_vfsops, ufs, 0); 110 MODULE_VERSION(ufs, 1); 111 112 static b_strategy_t ffs_geom_strategy; 113 static b_write_t ffs_bufwrite; 114 115 static struct buf_ops ffs_ops = { 116 .bop_name = "FFS", 117 .bop_write = ffs_bufwrite, 118 .bop_strategy = ffs_geom_strategy, 119 .bop_sync = bufsync, 120 #ifdef NO_FFS_SNAPSHOT 121 .bop_bdflush = bufbdflush, 122 #else 123 .bop_bdflush = ffs_bdflush, 124 #endif 125 }; 126 127 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 128 "noclusterw", "noexec", "export", "force", "from", "multilabel", 129 "snapshot", "nosuid", "suiddir", "nosymfollow", "sync", 130 "union", "nfsv4acls", NULL }; 131 132 static int 133 ffs_mount(struct mount *mp) 134 { 135 struct vnode *devvp; 136 struct thread *td; 137 struct ufsmount *ump = 0; 138 struct fs *fs; 139 int error, flags; 140 u_int mntorflags; 141 accmode_t accmode; 142 struct nameidata ndp; 143 char *fspec; 144 145 td = curthread; 146 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 147 return (EINVAL); 148 if (uma_inode == NULL) { 149 uma_inode = uma_zcreate("FFS inode", 150 sizeof(struct inode), NULL, NULL, NULL, NULL, 151 UMA_ALIGN_PTR, 0); 152 uma_ufs1 = uma_zcreate("FFS1 dinode", 153 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 154 UMA_ALIGN_PTR, 0); 155 uma_ufs2 = uma_zcreate("FFS2 dinode", 156 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 157 UMA_ALIGN_PTR, 0); 158 } 159 160 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 161 if (error) 162 return (error); 163 164 mntorflags = 0; 165 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 166 mntorflags |= MNT_ACLS; 167 168 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 169 mntorflags |= MNT_SNAPSHOT; 170 /* 171 * Once we have set the MNT_SNAPSHOT flag, do not 172 * persist "snapshot" in the options list. 173 */ 174 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 175 vfs_deleteopt(mp->mnt_opt, "snapshot"); 176 } 177 178 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { 179 if (mntorflags & MNT_ACLS) { 180 printf("WARNING: \"acls\" and \"nfsv4acls\" " 181 "options are mutually exclusive\n"); 182 return (EINVAL); 183 } 184 mntorflags |= MNT_NFS4ACLS; 185 } 186 187 MNT_ILOCK(mp); 188 mp->mnt_flag |= mntorflags; 189 MNT_IUNLOCK(mp); 190 /* 191 * If updating, check whether changing from read-only to 192 * read/write; if there is no device name, that's all we do. 193 */ 194 if (mp->mnt_flag & MNT_UPDATE) { 195 ump = VFSTOUFS(mp); 196 fs = ump->um_fs; 197 devvp = ump->um_devvp; 198 if (fs->fs_ronly == 0 && 199 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 200 /* 201 * Flush any dirty data and suspend filesystem. 202 */ 203 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 204 return (error); 205 for (;;) { 206 vn_finished_write(mp); 207 if ((error = vfs_write_suspend(mp)) != 0) 208 return (error); 209 MNT_ILOCK(mp); 210 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 211 /* 212 * Allow the secondary writes 213 * to proceed. 214 */ 215 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 216 MNTK_SUSPEND2); 217 wakeup(&mp->mnt_flag); 218 MNT_IUNLOCK(mp); 219 /* 220 * Allow the curthread to 221 * ignore the suspension to 222 * synchronize on-disk state. 223 */ 224 td->td_pflags |= TDP_IGNSUSP; 225 break; 226 } 227 MNT_IUNLOCK(mp); 228 vn_start_write(NULL, &mp, V_WAIT); 229 } 230 /* 231 * Check for and optionally get rid of files open 232 * for writing. 233 */ 234 flags = WRITECLOSE; 235 if (mp->mnt_flag & MNT_FORCE) 236 flags |= FORCECLOSE; 237 if (mp->mnt_flag & MNT_SOFTDEP) { 238 error = softdep_flushfiles(mp, flags, td); 239 } else { 240 error = ffs_flushfiles(mp, flags, td); 241 } 242 if (error) { 243 vfs_write_resume(mp); 244 return (error); 245 } 246 if (fs->fs_pendingblocks != 0 || 247 fs->fs_pendinginodes != 0) { 248 printf("%s: %s: blocks %jd files %d\n", 249 fs->fs_fsmnt, "update error", 250 (intmax_t)fs->fs_pendingblocks, 251 fs->fs_pendinginodes); 252 fs->fs_pendingblocks = 0; 253 fs->fs_pendinginodes = 0; 254 } 255 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 256 fs->fs_clean = 1; 257 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 258 fs->fs_ronly = 0; 259 fs->fs_clean = 0; 260 vfs_write_resume(mp); 261 return (error); 262 } 263 DROP_GIANT(); 264 g_topology_lock(); 265 g_access(ump->um_cp, 0, -1, 0); 266 g_topology_unlock(); 267 PICKUP_GIANT(); 268 fs->fs_ronly = 1; 269 MNT_ILOCK(mp); 270 mp->mnt_flag |= MNT_RDONLY; 271 MNT_IUNLOCK(mp); 272 /* 273 * Allow the writers to note that filesystem 274 * is ro now. 275 */ 276 vfs_write_resume(mp); 277 } 278 if ((mp->mnt_flag & MNT_RELOAD) && 279 (error = ffs_reload(mp, td)) != 0) 280 return (error); 281 if (fs->fs_ronly && 282 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 283 /* 284 * If upgrade to read-write by non-root, then verify 285 * that user has necessary permissions on the device. 286 */ 287 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 288 error = VOP_ACCESS(devvp, VREAD | VWRITE, 289 td->td_ucred, td); 290 if (error) 291 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 292 if (error) { 293 VOP_UNLOCK(devvp, 0); 294 return (error); 295 } 296 VOP_UNLOCK(devvp, 0); 297 fs->fs_flags &= ~FS_UNCLEAN; 298 if (fs->fs_clean == 0) { 299 fs->fs_flags |= FS_UNCLEAN; 300 if ((mp->mnt_flag & MNT_FORCE) || 301 ((fs->fs_flags & 302 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 303 (fs->fs_flags & FS_DOSOFTDEP))) { 304 printf("WARNING: %s was not %s\n", 305 fs->fs_fsmnt, "properly dismounted"); 306 } else { 307 printf( 308 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 309 fs->fs_fsmnt); 310 if (fs->fs_flags & FS_SUJ) 311 printf( 312 "WARNING: Forced mount will invalidated journal contents\n"); 313 return (EPERM); 314 } 315 } 316 DROP_GIANT(); 317 g_topology_lock(); 318 /* 319 * If we're the root device, we may not have an E count 320 * yet, get it now. 321 */ 322 if (ump->um_cp->ace == 0) 323 error = g_access(ump->um_cp, 0, 1, 1); 324 else 325 error = g_access(ump->um_cp, 0, 1, 0); 326 g_topology_unlock(); 327 PICKUP_GIANT(); 328 if (error) 329 return (error); 330 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 331 return (error); 332 fs->fs_ronly = 0; 333 MNT_ILOCK(mp); 334 mp->mnt_flag &= ~MNT_RDONLY; 335 MNT_IUNLOCK(mp); 336 fs->fs_mtime = time_second; 337 /* check to see if we need to start softdep */ 338 if ((fs->fs_flags & FS_DOSOFTDEP) && 339 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 340 vn_finished_write(mp); 341 return (error); 342 } 343 fs->fs_clean = 0; 344 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 345 vn_finished_write(mp); 346 return (error); 347 } 348 if (fs->fs_snapinum[0] != 0) 349 ffs_snapshot_mount(mp); 350 vn_finished_write(mp); 351 } 352 /* 353 * Soft updates is incompatible with "async", 354 * so if we are doing softupdates stop the user 355 * from setting the async flag in an update. 356 * Softdep_mount() clears it in an initial mount 357 * or ro->rw remount. 358 */ 359 if (mp->mnt_flag & MNT_SOFTDEP) { 360 /* XXX: Reset too late ? */ 361 MNT_ILOCK(mp); 362 mp->mnt_flag &= ~MNT_ASYNC; 363 MNT_IUNLOCK(mp); 364 } 365 /* 366 * Keep MNT_ACLS flag if it is stored in superblock. 367 */ 368 if ((fs->fs_flags & FS_ACLS) != 0) { 369 /* XXX: Set too late ? */ 370 MNT_ILOCK(mp); 371 mp->mnt_flag |= MNT_ACLS; 372 MNT_IUNLOCK(mp); 373 } 374 375 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 376 /* XXX: Set too late ? */ 377 MNT_ILOCK(mp); 378 mp->mnt_flag |= MNT_NFS4ACLS; 379 MNT_IUNLOCK(mp); 380 } 381 382 /* 383 * If this is a snapshot request, take the snapshot. 384 */ 385 if (mp->mnt_flag & MNT_SNAPSHOT) 386 return (ffs_snapshot(mp, fspec)); 387 } 388 389 /* 390 * Not an update, or updating the name: look up the name 391 * and verify that it refers to a sensible disk device. 392 */ 393 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 394 if ((error = namei(&ndp)) != 0) 395 return (error); 396 NDFREE(&ndp, NDF_ONLY_PNBUF); 397 devvp = ndp.ni_vp; 398 if (!vn_isdisk(devvp, &error)) { 399 vput(devvp); 400 return (error); 401 } 402 403 /* 404 * If mount by non-root, then verify that user has necessary 405 * permissions on the device. 406 */ 407 accmode = VREAD; 408 if ((mp->mnt_flag & MNT_RDONLY) == 0) 409 accmode |= VWRITE; 410 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 411 if (error) 412 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 413 if (error) { 414 vput(devvp); 415 return (error); 416 } 417 418 if (mp->mnt_flag & MNT_UPDATE) { 419 /* 420 * Update only 421 * 422 * If it's not the same vnode, or at least the same device 423 * then it's not correct. 424 */ 425 426 if (devvp->v_rdev != ump->um_devvp->v_rdev) 427 error = EINVAL; /* needs translation */ 428 vput(devvp); 429 if (error) 430 return (error); 431 } else { 432 /* 433 * New mount 434 * 435 * We need the name for the mount point (also used for 436 * "last mounted on") copied in. If an error occurs, 437 * the mount point is discarded by the upper level code. 438 * Note that vfs_mount() populates f_mntonname for us. 439 */ 440 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 441 vrele(devvp); 442 return (error); 443 } 444 } 445 vfs_mountedfrom(mp, fspec); 446 return (0); 447 } 448 449 /* 450 * Compatibility with old mount system call. 451 */ 452 453 static int 454 ffs_cmount(struct mntarg *ma, void *data, int flags) 455 { 456 struct ufs_args args; 457 int error; 458 459 if (data == NULL) 460 return (EINVAL); 461 error = copyin(data, &args, sizeof args); 462 if (error) 463 return (error); 464 465 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 466 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 467 error = kernel_mount(ma, flags); 468 469 return (error); 470 } 471 472 /* 473 * Reload all incore data for a filesystem (used after running fsck on 474 * the root filesystem and finding things to fix). The filesystem must 475 * be mounted read-only. 476 * 477 * Things to do to update the mount: 478 * 1) invalidate all cached meta-data. 479 * 2) re-read superblock from disk. 480 * 3) re-read summary information from disk. 481 * 4) invalidate all inactive vnodes. 482 * 5) invalidate all cached file data. 483 * 6) re-read inode data for all active vnodes. 484 */ 485 static int 486 ffs_reload(struct mount *mp, struct thread *td) 487 { 488 struct vnode *vp, *mvp, *devvp; 489 struct inode *ip; 490 void *space; 491 struct buf *bp; 492 struct fs *fs, *newfs; 493 struct ufsmount *ump; 494 ufs2_daddr_t sblockloc; 495 int i, blks, size, error; 496 int32_t *lp; 497 498 if ((mp->mnt_flag & MNT_RDONLY) == 0) 499 return (EINVAL); 500 ump = VFSTOUFS(mp); 501 /* 502 * Step 1: invalidate all cached meta-data. 503 */ 504 devvp = VFSTOUFS(mp)->um_devvp; 505 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 506 if (vinvalbuf(devvp, 0, 0, 0) != 0) 507 panic("ffs_reload: dirty1"); 508 VOP_UNLOCK(devvp, 0); 509 510 /* 511 * Step 2: re-read superblock from disk. 512 */ 513 fs = VFSTOUFS(mp)->um_fs; 514 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 515 NOCRED, &bp)) != 0) 516 return (error); 517 newfs = (struct fs *)bp->b_data; 518 if ((newfs->fs_magic != FS_UFS1_MAGIC && 519 newfs->fs_magic != FS_UFS2_MAGIC) || 520 newfs->fs_bsize > MAXBSIZE || 521 newfs->fs_bsize < sizeof(struct fs)) { 522 brelse(bp); 523 return (EIO); /* XXX needs translation */ 524 } 525 /* 526 * Copy pointer fields back into superblock before copying in XXX 527 * new superblock. These should really be in the ufsmount. XXX 528 * Note that important parameters (eg fs_ncg) are unchanged. 529 */ 530 newfs->fs_csp = fs->fs_csp; 531 newfs->fs_maxcluster = fs->fs_maxcluster; 532 newfs->fs_contigdirs = fs->fs_contigdirs; 533 newfs->fs_active = fs->fs_active; 534 /* The file system is still read-only. */ 535 newfs->fs_ronly = 1; 536 sblockloc = fs->fs_sblockloc; 537 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 538 brelse(bp); 539 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 540 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 541 UFS_LOCK(ump); 542 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 543 printf("%s: reload pending error: blocks %jd files %d\n", 544 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 545 fs->fs_pendinginodes); 546 fs->fs_pendingblocks = 0; 547 fs->fs_pendinginodes = 0; 548 } 549 UFS_UNLOCK(ump); 550 551 /* 552 * Step 3: re-read summary information from disk. 553 */ 554 blks = howmany(fs->fs_cssize, fs->fs_fsize); 555 space = fs->fs_csp; 556 for (i = 0; i < blks; i += fs->fs_frag) { 557 size = fs->fs_bsize; 558 if (i + fs->fs_frag > blks) 559 size = (blks - i) * fs->fs_fsize; 560 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 561 NOCRED, &bp); 562 if (error) 563 return (error); 564 bcopy(bp->b_data, space, (u_int)size); 565 space = (char *)space + size; 566 brelse(bp); 567 } 568 /* 569 * We no longer know anything about clusters per cylinder group. 570 */ 571 if (fs->fs_contigsumsize > 0) { 572 lp = fs->fs_maxcluster; 573 for (i = 0; i < fs->fs_ncg; i++) 574 *lp++ = fs->fs_contigsumsize; 575 } 576 577 loop: 578 MNT_ILOCK(mp); 579 MNT_VNODE_FOREACH(vp, mp, mvp) { 580 VI_LOCK(vp); 581 if (vp->v_iflag & VI_DOOMED) { 582 VI_UNLOCK(vp); 583 continue; 584 } 585 MNT_IUNLOCK(mp); 586 /* 587 * Step 4: invalidate all cached file data. 588 */ 589 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 590 MNT_VNODE_FOREACH_ABORT(mp, mvp); 591 goto loop; 592 } 593 if (vinvalbuf(vp, 0, 0, 0)) 594 panic("ffs_reload: dirty2"); 595 /* 596 * Step 5: re-read inode data for all active vnodes. 597 */ 598 ip = VTOI(vp); 599 error = 600 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 601 (int)fs->fs_bsize, NOCRED, &bp); 602 if (error) { 603 VOP_UNLOCK(vp, 0); 604 vrele(vp); 605 MNT_VNODE_FOREACH_ABORT(mp, mvp); 606 return (error); 607 } 608 ffs_load_inode(bp, ip, fs, ip->i_number); 609 ip->i_effnlink = ip->i_nlink; 610 brelse(bp); 611 VOP_UNLOCK(vp, 0); 612 vrele(vp); 613 MNT_ILOCK(mp); 614 } 615 MNT_IUNLOCK(mp); 616 return (0); 617 } 618 619 /* 620 * Possible superblock locations ordered from most to least likely. 621 */ 622 static int sblock_try[] = SBLOCKSEARCH; 623 624 /* 625 * Common code for mount and mountroot 626 */ 627 static int 628 ffs_mountfs(devvp, mp, td) 629 struct vnode *devvp; 630 struct mount *mp; 631 struct thread *td; 632 { 633 struct ufsmount *ump; 634 struct buf *bp; 635 struct fs *fs; 636 struct cdev *dev; 637 void *space; 638 ufs2_daddr_t sblockloc; 639 int error, i, blks, size, ronly; 640 int32_t *lp; 641 struct ucred *cred; 642 struct g_consumer *cp; 643 struct mount *nmp; 644 645 bp = NULL; 646 ump = NULL; 647 cred = td ? td->td_ucred : NOCRED; 648 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 649 650 dev = devvp->v_rdev; 651 dev_ref(dev); 652 DROP_GIANT(); 653 g_topology_lock(); 654 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 655 656 /* 657 * If we are a root mount, drop the E flag so fsck can do its magic. 658 * We will pick it up again when we remount R/W. 659 */ 660 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 661 error = g_access(cp, 0, 0, -1); 662 g_topology_unlock(); 663 PICKUP_GIANT(); 664 VOP_UNLOCK(devvp, 0); 665 if (error) 666 goto out; 667 if (devvp->v_rdev->si_iosize_max != 0) 668 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 669 if (mp->mnt_iosize_max > MAXPHYS) 670 mp->mnt_iosize_max = MAXPHYS; 671 672 devvp->v_bufobj.bo_ops = &ffs_ops; 673 674 fs = NULL; 675 sblockloc = 0; 676 /* 677 * Try reading the superblock in each of its possible locations. 678 */ 679 for (i = 0; sblock_try[i] != -1; i++) { 680 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 681 error = EINVAL; 682 vfs_mount_error(mp, 683 "Invalid sectorsize %d for superblock size %d", 684 cp->provider->sectorsize, SBLOCKSIZE); 685 goto out; 686 } 687 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 688 cred, &bp)) != 0) 689 goto out; 690 fs = (struct fs *)bp->b_data; 691 sblockloc = sblock_try[i]; 692 if ((fs->fs_magic == FS_UFS1_MAGIC || 693 (fs->fs_magic == FS_UFS2_MAGIC && 694 (fs->fs_sblockloc == sblockloc || 695 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 696 fs->fs_bsize <= MAXBSIZE && 697 fs->fs_bsize >= sizeof(struct fs)) 698 break; 699 brelse(bp); 700 bp = NULL; 701 } 702 if (sblock_try[i] == -1) { 703 error = EINVAL; /* XXX needs translation */ 704 goto out; 705 } 706 fs->fs_fmod = 0; 707 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 708 fs->fs_flags &= ~FS_UNCLEAN; 709 if (fs->fs_clean == 0) { 710 fs->fs_flags |= FS_UNCLEAN; 711 if (ronly || (mp->mnt_flag & MNT_FORCE) || 712 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 713 (fs->fs_flags & FS_DOSOFTDEP))) { 714 printf( 715 "WARNING: %s was not properly dismounted\n", 716 fs->fs_fsmnt); 717 } else { 718 printf( 719 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 720 fs->fs_fsmnt); 721 if (fs->fs_flags & FS_SUJ) 722 printf( 723 "WARNING: Forced mount will invalidated journal contents\n"); 724 error = EPERM; 725 goto out; 726 } 727 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 728 (mp->mnt_flag & MNT_FORCE)) { 729 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 730 (intmax_t)fs->fs_pendingblocks, 731 fs->fs_pendinginodes); 732 fs->fs_pendingblocks = 0; 733 fs->fs_pendinginodes = 0; 734 } 735 } 736 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 737 printf("%s: mount pending error: blocks %jd files %d\n", 738 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 739 fs->fs_pendinginodes); 740 fs->fs_pendingblocks = 0; 741 fs->fs_pendinginodes = 0; 742 } 743 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 744 #ifdef UFS_GJOURNAL 745 /* 746 * Get journal provider name. 747 */ 748 size = 1024; 749 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 750 if (g_io_getattr("GJOURNAL::provider", cp, &size, 751 mp->mnt_gjprovider) == 0) { 752 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 753 M_UFSMNT, M_WAITOK); 754 MNT_ILOCK(mp); 755 mp->mnt_flag |= MNT_GJOURNAL; 756 MNT_IUNLOCK(mp); 757 } else { 758 printf( 759 "WARNING: %s: GJOURNAL flag on fs but no gjournal provider below\n", 760 mp->mnt_stat.f_mntonname); 761 free(mp->mnt_gjprovider, M_UFSMNT); 762 mp->mnt_gjprovider = NULL; 763 } 764 #else 765 printf( 766 "WARNING: %s: GJOURNAL flag on fs but no UFS_GJOURNAL support\n", 767 mp->mnt_stat.f_mntonname); 768 #endif 769 } else { 770 mp->mnt_gjprovider = NULL; 771 } 772 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 773 ump->um_cp = cp; 774 ump->um_bo = &devvp->v_bufobj; 775 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 776 if (fs->fs_magic == FS_UFS1_MAGIC) { 777 ump->um_fstype = UFS1; 778 ump->um_balloc = ffs_balloc_ufs1; 779 } else { 780 ump->um_fstype = UFS2; 781 ump->um_balloc = ffs_balloc_ufs2; 782 } 783 ump->um_blkatoff = ffs_blkatoff; 784 ump->um_truncate = ffs_truncate; 785 ump->um_update = ffs_update; 786 ump->um_valloc = ffs_valloc; 787 ump->um_vfree = ffs_vfree; 788 ump->um_ifree = ffs_ifree; 789 ump->um_rdonly = ffs_rdonly; 790 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 791 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 792 if (fs->fs_sbsize < SBLOCKSIZE) 793 bp->b_flags |= B_INVAL | B_NOCACHE; 794 brelse(bp); 795 bp = NULL; 796 fs = ump->um_fs; 797 ffs_oldfscompat_read(fs, ump, sblockloc); 798 fs->fs_ronly = ronly; 799 size = fs->fs_cssize; 800 blks = howmany(size, fs->fs_fsize); 801 if (fs->fs_contigsumsize > 0) 802 size += fs->fs_ncg * sizeof(int32_t); 803 size += fs->fs_ncg * sizeof(u_int8_t); 804 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 805 fs->fs_csp = space; 806 for (i = 0; i < blks; i += fs->fs_frag) { 807 size = fs->fs_bsize; 808 if (i + fs->fs_frag > blks) 809 size = (blks - i) * fs->fs_fsize; 810 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 811 cred, &bp)) != 0) { 812 free(fs->fs_csp, M_UFSMNT); 813 goto out; 814 } 815 bcopy(bp->b_data, space, (u_int)size); 816 space = (char *)space + size; 817 brelse(bp); 818 bp = NULL; 819 } 820 if (fs->fs_contigsumsize > 0) { 821 fs->fs_maxcluster = lp = space; 822 for (i = 0; i < fs->fs_ncg; i++) 823 *lp++ = fs->fs_contigsumsize; 824 space = lp; 825 } 826 size = fs->fs_ncg * sizeof(u_int8_t); 827 fs->fs_contigdirs = (u_int8_t *)space; 828 bzero(fs->fs_contigdirs, size); 829 fs->fs_active = NULL; 830 mp->mnt_data = ump; 831 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 832 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 833 nmp = NULL; 834 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 835 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 836 if (nmp) 837 vfs_rel(nmp); 838 vfs_getnewfsid(mp); 839 } 840 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 841 MNT_ILOCK(mp); 842 mp->mnt_flag |= MNT_LOCAL; 843 MNT_IUNLOCK(mp); 844 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 845 #ifdef MAC 846 MNT_ILOCK(mp); 847 mp->mnt_flag |= MNT_MULTILABEL; 848 MNT_IUNLOCK(mp); 849 #else 850 printf( 851 "WARNING: %s: multilabel flag on fs but no MAC support\n", 852 mp->mnt_stat.f_mntonname); 853 #endif 854 } 855 if ((fs->fs_flags & FS_ACLS) != 0) { 856 #ifdef UFS_ACL 857 MNT_ILOCK(mp); 858 859 if (mp->mnt_flag & MNT_NFS4ACLS) 860 printf("WARNING: ACLs flag on fs conflicts with " 861 "\"nfsv4acls\" mount option; option ignored\n"); 862 mp->mnt_flag &= ~MNT_NFS4ACLS; 863 mp->mnt_flag |= MNT_ACLS; 864 865 MNT_IUNLOCK(mp); 866 #else 867 printf( 868 "WARNING: %s: ACLs flag on fs but no ACLs support\n", 869 mp->mnt_stat.f_mntonname); 870 #endif 871 } 872 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 873 #ifdef UFS_ACL 874 MNT_ILOCK(mp); 875 876 if (mp->mnt_flag & MNT_ACLS) 877 printf("WARNING: NFSv4 ACLs flag on fs conflicts with " 878 "\"acls\" mount option; option ignored\n"); 879 mp->mnt_flag &= ~MNT_ACLS; 880 mp->mnt_flag |= MNT_NFS4ACLS; 881 882 MNT_IUNLOCK(mp); 883 #else 884 printf( 885 "WARNING: %s: NFSv4 ACLs flag on fs but no ACLs support\n", 886 mp->mnt_stat.f_mntonname); 887 #endif 888 } 889 890 ump->um_mountp = mp; 891 ump->um_dev = dev; 892 ump->um_devvp = devvp; 893 ump->um_nindir = fs->fs_nindir; 894 ump->um_bptrtodb = fs->fs_fsbtodb; 895 ump->um_seqinc = fs->fs_frag; 896 for (i = 0; i < MAXQUOTAS; i++) 897 ump->um_quotas[i] = NULLVP; 898 #ifdef UFS_EXTATTR 899 ufs_extattr_uepm_init(&ump->um_extattr); 900 #endif 901 /* 902 * Set FS local "last mounted on" information (NULL pad) 903 */ 904 bzero(fs->fs_fsmnt, MAXMNTLEN); 905 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 906 mp->mnt_stat.f_iosize = fs->fs_bsize; 907 908 if( mp->mnt_flag & MNT_ROOTFS) { 909 /* 910 * Root mount; update timestamp in mount structure. 911 * this will be used by the common root mount code 912 * to update the system clock. 913 */ 914 mp->mnt_time = fs->fs_time; 915 } 916 917 if (ronly == 0) { 918 fs->fs_mtime = time_second; 919 if ((fs->fs_flags & FS_DOSOFTDEP) && 920 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 921 free(fs->fs_csp, M_UFSMNT); 922 goto out; 923 } 924 if (fs->fs_snapinum[0] != 0) 925 ffs_snapshot_mount(mp); 926 fs->fs_fmod = 1; 927 fs->fs_clean = 0; 928 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 929 } 930 /* 931 * Initialize filesystem stat information in mount struct. 932 */ 933 MNT_ILOCK(mp); 934 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 935 MNTK_EXTENDED_SHARED; 936 MNT_IUNLOCK(mp); 937 #ifdef UFS_EXTATTR 938 #ifdef UFS_EXTATTR_AUTOSTART 939 /* 940 * 941 * Auto-starting does the following: 942 * - check for /.attribute in the fs, and extattr_start if so 943 * - for each file in .attribute, enable that file with 944 * an attribute of the same name. 945 * Not clear how to report errors -- probably eat them. 946 * This would all happen while the filesystem was busy/not 947 * available, so would effectively be "atomic". 948 */ 949 (void) ufs_extattr_autostart(mp, td); 950 #endif /* !UFS_EXTATTR_AUTOSTART */ 951 #endif /* !UFS_EXTATTR */ 952 return (0); 953 out: 954 if (bp) 955 brelse(bp); 956 if (cp != NULL) { 957 DROP_GIANT(); 958 g_topology_lock(); 959 g_vfs_close(cp); 960 g_topology_unlock(); 961 PICKUP_GIANT(); 962 } 963 if (ump) { 964 mtx_destroy(UFS_MTX(ump)); 965 if (mp->mnt_gjprovider != NULL) { 966 free(mp->mnt_gjprovider, M_UFSMNT); 967 mp->mnt_gjprovider = NULL; 968 } 969 free(ump->um_fs, M_UFSMNT); 970 free(ump, M_UFSMNT); 971 mp->mnt_data = NULL; 972 } 973 dev_rel(dev); 974 return (error); 975 } 976 977 #include <sys/sysctl.h> 978 static int bigcgs = 0; 979 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 980 981 /* 982 * Sanity checks for loading old filesystem superblocks. 983 * See ffs_oldfscompat_write below for unwound actions. 984 * 985 * XXX - Parts get retired eventually. 986 * Unfortunately new bits get added. 987 */ 988 static void 989 ffs_oldfscompat_read(fs, ump, sblockloc) 990 struct fs *fs; 991 struct ufsmount *ump; 992 ufs2_daddr_t sblockloc; 993 { 994 off_t maxfilesize; 995 996 /* 997 * If not yet done, update fs_flags location and value of fs_sblockloc. 998 */ 999 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1000 fs->fs_flags = fs->fs_old_flags; 1001 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1002 fs->fs_sblockloc = sblockloc; 1003 } 1004 /* 1005 * If not yet done, update UFS1 superblock with new wider fields. 1006 */ 1007 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1008 fs->fs_maxbsize = fs->fs_bsize; 1009 fs->fs_time = fs->fs_old_time; 1010 fs->fs_size = fs->fs_old_size; 1011 fs->fs_dsize = fs->fs_old_dsize; 1012 fs->fs_csaddr = fs->fs_old_csaddr; 1013 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1014 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1015 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1016 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1017 } 1018 if (fs->fs_magic == FS_UFS1_MAGIC && 1019 fs->fs_old_inodefmt < FS_44INODEFMT) { 1020 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1021 fs->fs_qbmask = ~fs->fs_bmask; 1022 fs->fs_qfmask = ~fs->fs_fmask; 1023 } 1024 if (fs->fs_magic == FS_UFS1_MAGIC) { 1025 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1026 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1027 if (fs->fs_maxfilesize > maxfilesize) 1028 fs->fs_maxfilesize = maxfilesize; 1029 } 1030 /* Compatibility for old filesystems */ 1031 if (fs->fs_avgfilesize <= 0) 1032 fs->fs_avgfilesize = AVFILESIZ; 1033 if (fs->fs_avgfpdir <= 0) 1034 fs->fs_avgfpdir = AFPDIR; 1035 if (bigcgs) { 1036 fs->fs_save_cgsize = fs->fs_cgsize; 1037 fs->fs_cgsize = fs->fs_bsize; 1038 } 1039 } 1040 1041 /* 1042 * Unwinding superblock updates for old filesystems. 1043 * See ffs_oldfscompat_read above for details. 1044 * 1045 * XXX - Parts get retired eventually. 1046 * Unfortunately new bits get added. 1047 */ 1048 void 1049 ffs_oldfscompat_write(fs, ump) 1050 struct fs *fs; 1051 struct ufsmount *ump; 1052 { 1053 1054 /* 1055 * Copy back UFS2 updated fields that UFS1 inspects. 1056 */ 1057 if (fs->fs_magic == FS_UFS1_MAGIC) { 1058 fs->fs_old_time = fs->fs_time; 1059 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1060 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1061 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1062 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1063 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1064 } 1065 if (bigcgs) { 1066 fs->fs_cgsize = fs->fs_save_cgsize; 1067 fs->fs_save_cgsize = 0; 1068 } 1069 } 1070 1071 /* 1072 * unmount system call 1073 */ 1074 static int 1075 ffs_unmount(mp, mntflags) 1076 struct mount *mp; 1077 int mntflags; 1078 { 1079 struct thread *td; 1080 struct ufsmount *ump = VFSTOUFS(mp); 1081 struct fs *fs; 1082 int error, flags, susp; 1083 #ifdef UFS_EXTATTR 1084 int e_restart; 1085 #endif 1086 1087 flags = 0; 1088 td = curthread; 1089 fs = ump->um_fs; 1090 if (mntflags & MNT_FORCE) { 1091 flags |= FORCECLOSE; 1092 susp = fs->fs_ronly != 0; 1093 } else 1094 susp = 0; 1095 #ifdef UFS_EXTATTR 1096 if ((error = ufs_extattr_stop(mp, td))) { 1097 if (error != EOPNOTSUPP) 1098 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 1099 error); 1100 e_restart = 0; 1101 } else { 1102 ufs_extattr_uepm_destroy(&ump->um_extattr); 1103 e_restart = 1; 1104 } 1105 #endif 1106 if (susp) { 1107 /* 1108 * dounmount already called vn_start_write(). 1109 */ 1110 for (;;) { 1111 vn_finished_write(mp); 1112 if ((error = vfs_write_suspend(mp)) != 0) 1113 return (error); 1114 MNT_ILOCK(mp); 1115 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1116 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1117 MNTK_SUSPEND2); 1118 wakeup(&mp->mnt_flag); 1119 MNT_IUNLOCK(mp); 1120 td->td_pflags |= TDP_IGNSUSP; 1121 break; 1122 } 1123 MNT_IUNLOCK(mp); 1124 vn_start_write(NULL, &mp, V_WAIT); 1125 } 1126 } 1127 if (mp->mnt_flag & MNT_SOFTDEP) 1128 error = softdep_flushfiles(mp, flags, td); 1129 else 1130 error = ffs_flushfiles(mp, flags, td); 1131 if (error != 0 && error != ENXIO) 1132 goto fail; 1133 1134 UFS_LOCK(ump); 1135 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1136 printf("%s: unmount pending error: blocks %jd files %d\n", 1137 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1138 fs->fs_pendinginodes); 1139 fs->fs_pendingblocks = 0; 1140 fs->fs_pendinginodes = 0; 1141 } 1142 UFS_UNLOCK(ump); 1143 softdep_unmount(mp); 1144 if (fs->fs_ronly == 0) { 1145 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1146 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1147 if (error && error != ENXIO) { 1148 fs->fs_clean = 0; 1149 goto fail; 1150 } 1151 } 1152 if (susp) { 1153 vfs_write_resume(mp); 1154 vn_start_write(NULL, &mp, V_WAIT); 1155 } 1156 DROP_GIANT(); 1157 g_topology_lock(); 1158 g_vfs_close(ump->um_cp); 1159 g_topology_unlock(); 1160 PICKUP_GIANT(); 1161 vrele(ump->um_devvp); 1162 dev_rel(ump->um_dev); 1163 mtx_destroy(UFS_MTX(ump)); 1164 if (mp->mnt_gjprovider != NULL) { 1165 free(mp->mnt_gjprovider, M_UFSMNT); 1166 mp->mnt_gjprovider = NULL; 1167 } 1168 free(fs->fs_csp, M_UFSMNT); 1169 free(fs, M_UFSMNT); 1170 free(ump, M_UFSMNT); 1171 mp->mnt_data = NULL; 1172 MNT_ILOCK(mp); 1173 mp->mnt_flag &= ~MNT_LOCAL; 1174 MNT_IUNLOCK(mp); 1175 return (error); 1176 1177 fail: 1178 if (susp) { 1179 vfs_write_resume(mp); 1180 vn_start_write(NULL, &mp, V_WAIT); 1181 } 1182 #ifdef UFS_EXTATTR 1183 if (e_restart) { 1184 ufs_extattr_uepm_init(&ump->um_extattr); 1185 #ifdef UFS_EXTATTR_AUTOSTART 1186 (void) ufs_extattr_autostart(mp, td); 1187 #endif 1188 } 1189 #endif 1190 1191 return (error); 1192 } 1193 1194 /* 1195 * Flush out all the files in a filesystem. 1196 */ 1197 int 1198 ffs_flushfiles(mp, flags, td) 1199 struct mount *mp; 1200 int flags; 1201 struct thread *td; 1202 { 1203 struct ufsmount *ump; 1204 int error; 1205 1206 ump = VFSTOUFS(mp); 1207 #ifdef QUOTA 1208 if (mp->mnt_flag & MNT_QUOTA) { 1209 int i; 1210 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1211 if (error) 1212 return (error); 1213 for (i = 0; i < MAXQUOTAS; i++) { 1214 quotaoff(td, mp, i); 1215 } 1216 /* 1217 * Here we fall through to vflush again to ensure 1218 * that we have gotten rid of all the system vnodes. 1219 */ 1220 } 1221 #endif 1222 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1223 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1224 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1225 return (error); 1226 ffs_snapshot_unmount(mp); 1227 flags |= FORCECLOSE; 1228 /* 1229 * Here we fall through to vflush again to ensure 1230 * that we have gotten rid of all the system vnodes. 1231 */ 1232 } 1233 /* 1234 * Flush all the files. 1235 */ 1236 if ((error = vflush(mp, 0, flags, td)) != 0) 1237 return (error); 1238 /* 1239 * Flush filesystem metadata. 1240 */ 1241 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1242 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1243 VOP_UNLOCK(ump->um_devvp, 0); 1244 return (error); 1245 } 1246 1247 /* 1248 * Get filesystem statistics. 1249 */ 1250 static int 1251 ffs_statfs(mp, sbp) 1252 struct mount *mp; 1253 struct statfs *sbp; 1254 { 1255 struct ufsmount *ump; 1256 struct fs *fs; 1257 1258 ump = VFSTOUFS(mp); 1259 fs = ump->um_fs; 1260 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1261 panic("ffs_statfs"); 1262 sbp->f_version = STATFS_VERSION; 1263 sbp->f_bsize = fs->fs_fsize; 1264 sbp->f_iosize = fs->fs_bsize; 1265 sbp->f_blocks = fs->fs_dsize; 1266 UFS_LOCK(ump); 1267 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1268 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1269 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1270 dbtofsb(fs, fs->fs_pendingblocks); 1271 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1272 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1273 UFS_UNLOCK(ump); 1274 sbp->f_namemax = NAME_MAX; 1275 return (0); 1276 } 1277 1278 /* 1279 * Go through the disk queues to initiate sandbagged IO; 1280 * go through the inodes to write those that have been modified; 1281 * initiate the writing of the super block if it has been modified. 1282 * 1283 * Note: we are always called with the filesystem marked `MPBUSY'. 1284 */ 1285 static int 1286 ffs_sync(mp, waitfor) 1287 struct mount *mp; 1288 int waitfor; 1289 { 1290 struct vnode *mvp, *vp, *devvp; 1291 struct thread *td; 1292 struct inode *ip; 1293 struct ufsmount *ump = VFSTOUFS(mp); 1294 struct fs *fs; 1295 int error, count, wait, lockreq, allerror = 0; 1296 int suspend; 1297 int suspended; 1298 int secondary_writes; 1299 int secondary_accwrites; 1300 int softdep_deps; 1301 int softdep_accdeps; 1302 struct bufobj *bo; 1303 1304 td = curthread; 1305 fs = ump->um_fs; 1306 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1307 printf("fs = %s\n", fs->fs_fsmnt); 1308 panic("ffs_sync: rofs mod"); 1309 } 1310 /* 1311 * Write back each (modified) inode. 1312 */ 1313 wait = 0; 1314 suspend = 0; 1315 suspended = 0; 1316 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1317 if (waitfor == MNT_SUSPEND) { 1318 suspend = 1; 1319 waitfor = MNT_WAIT; 1320 } 1321 if (waitfor == MNT_WAIT) { 1322 wait = 1; 1323 lockreq = LK_EXCLUSIVE; 1324 } 1325 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1326 MNT_ILOCK(mp); 1327 loop: 1328 /* Grab snapshot of secondary write counts */ 1329 secondary_writes = mp->mnt_secondary_writes; 1330 secondary_accwrites = mp->mnt_secondary_accwrites; 1331 1332 /* Grab snapshot of softdep dependency counts */ 1333 MNT_IUNLOCK(mp); 1334 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1335 MNT_ILOCK(mp); 1336 1337 MNT_VNODE_FOREACH(vp, mp, mvp) { 1338 /* 1339 * Depend on the mntvnode_slock to keep things stable enough 1340 * for a quick test. Since there might be hundreds of 1341 * thousands of vnodes, we cannot afford even a subroutine 1342 * call unless there's a good chance that we have work to do. 1343 */ 1344 VI_LOCK(vp); 1345 if (vp->v_iflag & VI_DOOMED) { 1346 VI_UNLOCK(vp); 1347 continue; 1348 } 1349 ip = VTOI(vp); 1350 if (vp->v_type == VNON || ((ip->i_flag & 1351 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1352 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1353 VI_UNLOCK(vp); 1354 continue; 1355 } 1356 MNT_IUNLOCK(mp); 1357 if ((error = vget(vp, lockreq, td)) != 0) { 1358 MNT_ILOCK(mp); 1359 if (error == ENOENT || error == ENOLCK) { 1360 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1361 goto loop; 1362 } 1363 continue; 1364 } 1365 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1366 allerror = error; 1367 vput(vp); 1368 MNT_ILOCK(mp); 1369 } 1370 MNT_IUNLOCK(mp); 1371 /* 1372 * Force stale filesystem control information to be flushed. 1373 */ 1374 if (waitfor == MNT_WAIT) { 1375 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1376 allerror = error; 1377 /* Flushed work items may create new vnodes to clean */ 1378 if (allerror == 0 && count) { 1379 MNT_ILOCK(mp); 1380 goto loop; 1381 } 1382 } 1383 #ifdef QUOTA 1384 qsync(mp); 1385 #endif 1386 devvp = ump->um_devvp; 1387 bo = &devvp->v_bufobj; 1388 BO_LOCK(bo); 1389 if (waitfor != MNT_LAZY && 1390 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1391 BO_UNLOCK(bo); 1392 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1393 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1394 allerror = error; 1395 VOP_UNLOCK(devvp, 0); 1396 if (allerror == 0 && waitfor == MNT_WAIT) { 1397 MNT_ILOCK(mp); 1398 goto loop; 1399 } 1400 } else if (suspend != 0) { 1401 if (softdep_check_suspend(mp, 1402 devvp, 1403 softdep_deps, 1404 softdep_accdeps, 1405 secondary_writes, 1406 secondary_accwrites) != 0) 1407 goto loop; /* More work needed */ 1408 mtx_assert(MNT_MTX(mp), MA_OWNED); 1409 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1410 MNT_IUNLOCK(mp); 1411 suspended = 1; 1412 } else 1413 BO_UNLOCK(bo); 1414 /* 1415 * Write back modified superblock. 1416 */ 1417 if (fs->fs_fmod != 0 && 1418 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1419 allerror = error; 1420 return (allerror); 1421 } 1422 1423 int 1424 ffs_vget(mp, ino, flags, vpp) 1425 struct mount *mp; 1426 ino_t ino; 1427 int flags; 1428 struct vnode **vpp; 1429 { 1430 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1431 } 1432 1433 int 1434 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1435 struct mount *mp; 1436 ino_t ino; 1437 int flags; 1438 struct vnode **vpp; 1439 int ffs_flags; 1440 { 1441 struct fs *fs; 1442 struct inode *ip; 1443 struct ufsmount *ump; 1444 struct buf *bp; 1445 struct vnode *vp; 1446 struct cdev *dev; 1447 int error; 1448 1449 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1450 if (error || *vpp != NULL) 1451 return (error); 1452 1453 /* 1454 * We must promote to an exclusive lock for vnode creation. This 1455 * can happen if lookup is passed LOCKSHARED. 1456 */ 1457 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1458 flags &= ~LK_TYPE_MASK; 1459 flags |= LK_EXCLUSIVE; 1460 } 1461 1462 /* 1463 * We do not lock vnode creation as it is believed to be too 1464 * expensive for such rare case as simultaneous creation of vnode 1465 * for same ino by different processes. We just allow them to race 1466 * and check later to decide who wins. Let the race begin! 1467 */ 1468 1469 ump = VFSTOUFS(mp); 1470 dev = ump->um_dev; 1471 fs = ump->um_fs; 1472 1473 /* 1474 * If this malloc() is performed after the getnewvnode() 1475 * it might block, leaving a vnode with a NULL v_data to be 1476 * found by ffs_sync() if a sync happens to fire right then, 1477 * which will cause a panic because ffs_sync() blindly 1478 * dereferences vp->v_data (as well it should). 1479 */ 1480 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1481 1482 /* Allocate a new vnode/inode. */ 1483 if (fs->fs_magic == FS_UFS1_MAGIC) 1484 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1485 else 1486 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1487 if (error) { 1488 *vpp = NULL; 1489 uma_zfree(uma_inode, ip); 1490 return (error); 1491 } 1492 /* 1493 * FFS supports recursive locking. 1494 */ 1495 VN_LOCK_AREC(vp); 1496 vp->v_data = ip; 1497 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1498 ip->i_vnode = vp; 1499 ip->i_ump = ump; 1500 ip->i_fs = fs; 1501 ip->i_dev = dev; 1502 ip->i_number = ino; 1503 ip->i_ea_refs = 0; 1504 #ifdef QUOTA 1505 { 1506 int i; 1507 for (i = 0; i < MAXQUOTAS; i++) 1508 ip->i_dquot[i] = NODQUOT; 1509 } 1510 #endif 1511 1512 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1513 if (ffs_flags & FFSV_FORCEINSMQ) 1514 vp->v_vflag |= VV_FORCEINSMQ; 1515 error = insmntque(vp, mp); 1516 if (error != 0) { 1517 uma_zfree(uma_inode, ip); 1518 *vpp = NULL; 1519 return (error); 1520 } 1521 vp->v_vflag &= ~VV_FORCEINSMQ; 1522 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1523 if (error || *vpp != NULL) 1524 return (error); 1525 1526 /* Read in the disk contents for the inode, copy into the inode. */ 1527 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1528 (int)fs->fs_bsize, NOCRED, &bp); 1529 if (error) { 1530 /* 1531 * The inode does not contain anything useful, so it would 1532 * be misleading to leave it on its hash chain. With mode 1533 * still zero, it will be unlinked and returned to the free 1534 * list by vput(). 1535 */ 1536 brelse(bp); 1537 vput(vp); 1538 *vpp = NULL; 1539 return (error); 1540 } 1541 if (ip->i_ump->um_fstype == UFS1) 1542 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1543 else 1544 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1545 ffs_load_inode(bp, ip, fs, ino); 1546 if (DOINGSOFTDEP(vp)) 1547 softdep_load_inodeblock(ip); 1548 else 1549 ip->i_effnlink = ip->i_nlink; 1550 bqrelse(bp); 1551 1552 /* 1553 * Initialize the vnode from the inode, check for aliases. 1554 * Note that the underlying vnode may have changed. 1555 */ 1556 if (ip->i_ump->um_fstype == UFS1) 1557 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1558 else 1559 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1560 if (error) { 1561 vput(vp); 1562 *vpp = NULL; 1563 return (error); 1564 } 1565 1566 /* 1567 * Finish inode initialization. 1568 */ 1569 if (vp->v_type != VFIFO) { 1570 /* FFS supports shared locking for all files except fifos. */ 1571 VN_LOCK_ASHARE(vp); 1572 } 1573 1574 /* 1575 * Set up a generation number for this inode if it does not 1576 * already have one. This should only happen on old filesystems. 1577 */ 1578 if (ip->i_gen == 0) { 1579 ip->i_gen = arc4random() / 2 + 1; 1580 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1581 ip->i_flag |= IN_MODIFIED; 1582 DIP_SET(ip, i_gen, ip->i_gen); 1583 } 1584 } 1585 #ifdef MAC 1586 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1587 /* 1588 * If this vnode is already allocated, and we're running 1589 * multi-label, attempt to perform a label association 1590 * from the extended attributes on the inode. 1591 */ 1592 error = mac_vnode_associate_extattr(mp, vp); 1593 if (error) { 1594 /* ufs_inactive will release ip->i_devvp ref. */ 1595 vput(vp); 1596 *vpp = NULL; 1597 return (error); 1598 } 1599 } 1600 #endif 1601 1602 *vpp = vp; 1603 return (0); 1604 } 1605 1606 /* 1607 * File handle to vnode 1608 * 1609 * Have to be really careful about stale file handles: 1610 * - check that the inode number is valid 1611 * - call ffs_vget() to get the locked inode 1612 * - check for an unallocated inode (i_mode == 0) 1613 * - check that the given client host has export rights and return 1614 * those rights via. exflagsp and credanonp 1615 */ 1616 static int 1617 ffs_fhtovp(mp, fhp, vpp) 1618 struct mount *mp; 1619 struct fid *fhp; 1620 struct vnode **vpp; 1621 { 1622 struct ufid *ufhp; 1623 struct fs *fs; 1624 1625 ufhp = (struct ufid *)fhp; 1626 fs = VFSTOUFS(mp)->um_fs; 1627 if (ufhp->ufid_ino < ROOTINO || 1628 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1629 return (ESTALE); 1630 return (ufs_fhtovp(mp, ufhp, vpp)); 1631 } 1632 1633 /* 1634 * Initialize the filesystem. 1635 */ 1636 static int 1637 ffs_init(vfsp) 1638 struct vfsconf *vfsp; 1639 { 1640 1641 softdep_initialize(); 1642 return (ufs_init(vfsp)); 1643 } 1644 1645 /* 1646 * Undo the work of ffs_init(). 1647 */ 1648 static int 1649 ffs_uninit(vfsp) 1650 struct vfsconf *vfsp; 1651 { 1652 int ret; 1653 1654 ret = ufs_uninit(vfsp); 1655 softdep_uninitialize(); 1656 return (ret); 1657 } 1658 1659 /* 1660 * Write a superblock and associated information back to disk. 1661 */ 1662 int 1663 ffs_sbupdate(mp, waitfor, suspended) 1664 struct ufsmount *mp; 1665 int waitfor; 1666 int suspended; 1667 { 1668 struct fs *fs = mp->um_fs; 1669 struct buf *sbbp; 1670 struct buf *bp; 1671 int blks; 1672 void *space; 1673 int i, size, error, allerror = 0; 1674 1675 if (fs->fs_ronly == 1 && 1676 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1677 (MNT_RDONLY | MNT_UPDATE)) 1678 panic("ffs_sbupdate: write read-only filesystem"); 1679 /* 1680 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1681 */ 1682 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1683 0, 0, 0); 1684 /* 1685 * First write back the summary information. 1686 */ 1687 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1688 space = fs->fs_csp; 1689 for (i = 0; i < blks; i += fs->fs_frag) { 1690 size = fs->fs_bsize; 1691 if (i + fs->fs_frag > blks) 1692 size = (blks - i) * fs->fs_fsize; 1693 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1694 size, 0, 0, 0); 1695 bcopy(space, bp->b_data, (u_int)size); 1696 space = (char *)space + size; 1697 if (suspended) 1698 bp->b_flags |= B_VALIDSUSPWRT; 1699 if (waitfor != MNT_WAIT) 1700 bawrite(bp); 1701 else if ((error = bwrite(bp)) != 0) 1702 allerror = error; 1703 } 1704 /* 1705 * Now write back the superblock itself. If any errors occurred 1706 * up to this point, then fail so that the superblock avoids 1707 * being written out as clean. 1708 */ 1709 if (allerror) { 1710 brelse(sbbp); 1711 return (allerror); 1712 } 1713 bp = sbbp; 1714 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1715 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1716 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1717 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1718 fs->fs_sblockloc = SBLOCK_UFS1; 1719 } 1720 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1721 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1722 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1723 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1724 fs->fs_sblockloc = SBLOCK_UFS2; 1725 } 1726 fs->fs_fmod = 0; 1727 fs->fs_time = time_second; 1728 if (fs->fs_flags & FS_DOSOFTDEP) 1729 softdep_setup_sbupdate(mp, (struct fs *)bp->b_data, bp); 1730 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1731 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1732 if (suspended) 1733 bp->b_flags |= B_VALIDSUSPWRT; 1734 if (waitfor != MNT_WAIT) 1735 bawrite(bp); 1736 else if ((error = bwrite(bp)) != 0) 1737 allerror = error; 1738 return (allerror); 1739 } 1740 1741 static int 1742 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1743 int attrnamespace, const char *attrname) 1744 { 1745 1746 #ifdef UFS_EXTATTR 1747 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1748 attrname)); 1749 #else 1750 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1751 attrname)); 1752 #endif 1753 } 1754 1755 static void 1756 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1757 { 1758 1759 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1760 uma_zfree(uma_ufs1, ip->i_din1); 1761 else if (ip->i_din2 != NULL) 1762 uma_zfree(uma_ufs2, ip->i_din2); 1763 uma_zfree(uma_inode, ip); 1764 } 1765 1766 static int dobkgrdwrite = 1; 1767 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1768 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1769 1770 /* 1771 * Complete a background write started from bwrite. 1772 */ 1773 static void 1774 ffs_backgroundwritedone(struct buf *bp) 1775 { 1776 struct bufobj *bufobj; 1777 struct buf *origbp; 1778 1779 /* 1780 * Find the original buffer that we are writing. 1781 */ 1782 bufobj = bp->b_bufobj; 1783 BO_LOCK(bufobj); 1784 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1785 panic("backgroundwritedone: lost buffer"); 1786 /* Grab an extra reference to be dropped by the bufdone() below. */ 1787 bufobj_wrefl(bufobj); 1788 BO_UNLOCK(bufobj); 1789 /* 1790 * Process dependencies then return any unfinished ones. 1791 */ 1792 if (!LIST_EMPTY(&bp->b_dep)) 1793 buf_complete(bp); 1794 #ifdef SOFTUPDATES 1795 if (!LIST_EMPTY(&bp->b_dep)) 1796 softdep_move_dependencies(bp, origbp); 1797 #endif 1798 /* 1799 * This buffer is marked B_NOCACHE so when it is released 1800 * by biodone it will be tossed. 1801 */ 1802 bp->b_flags |= B_NOCACHE; 1803 bp->b_flags &= ~B_CACHE; 1804 bufdone(bp); 1805 BO_LOCK(bufobj); 1806 /* 1807 * Clear the BV_BKGRDINPROG flag in the original buffer 1808 * and awaken it if it is waiting for the write to complete. 1809 * If BV_BKGRDINPROG is not set in the original buffer it must 1810 * have been released and re-instantiated - which is not legal. 1811 */ 1812 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1813 ("backgroundwritedone: lost buffer2")); 1814 origbp->b_vflags &= ~BV_BKGRDINPROG; 1815 if (origbp->b_vflags & BV_BKGRDWAIT) { 1816 origbp->b_vflags &= ~BV_BKGRDWAIT; 1817 wakeup(&origbp->b_xflags); 1818 } 1819 BO_UNLOCK(bufobj); 1820 } 1821 1822 1823 /* 1824 * Write, release buffer on completion. (Done by iodone 1825 * if async). Do not bother writing anything if the buffer 1826 * is invalid. 1827 * 1828 * Note that we set B_CACHE here, indicating that buffer is 1829 * fully valid and thus cacheable. This is true even of NFS 1830 * now so we set it generally. This could be set either here 1831 * or in biodone() since the I/O is synchronous. We put it 1832 * here. 1833 */ 1834 static int 1835 ffs_bufwrite(struct buf *bp) 1836 { 1837 int oldflags, s; 1838 struct buf *newbp; 1839 1840 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1841 if (bp->b_flags & B_INVAL) { 1842 brelse(bp); 1843 return (0); 1844 } 1845 1846 oldflags = bp->b_flags; 1847 1848 if (!BUF_ISLOCKED(bp)) 1849 panic("bufwrite: buffer is not busy???"); 1850 s = splbio(); 1851 /* 1852 * If a background write is already in progress, delay 1853 * writing this block if it is asynchronous. Otherwise 1854 * wait for the background write to complete. 1855 */ 1856 BO_LOCK(bp->b_bufobj); 1857 if (bp->b_vflags & BV_BKGRDINPROG) { 1858 if (bp->b_flags & B_ASYNC) { 1859 BO_UNLOCK(bp->b_bufobj); 1860 splx(s); 1861 bdwrite(bp); 1862 return (0); 1863 } 1864 bp->b_vflags |= BV_BKGRDWAIT; 1865 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1866 if (bp->b_vflags & BV_BKGRDINPROG) 1867 panic("bufwrite: still writing"); 1868 } 1869 BO_UNLOCK(bp->b_bufobj); 1870 1871 /* 1872 * If this buffer is marked for background writing and we 1873 * do not have to wait for it, make a copy and write the 1874 * copy so as to leave this buffer ready for further use. 1875 * 1876 * This optimization eats a lot of memory. If we have a page 1877 * or buffer shortfall we can't do it. 1878 */ 1879 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1880 (bp->b_flags & B_ASYNC) && 1881 !vm_page_count_severe() && 1882 !buf_dirty_count_severe()) { 1883 KASSERT(bp->b_iodone == NULL, 1884 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1885 1886 /* get a new block */ 1887 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 1888 if (newbp == NULL) 1889 goto normal_write; 1890 1891 /* 1892 * set it to be identical to the old block. We have to 1893 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1894 * to avoid confusing the splay tree and gbincore(). 1895 */ 1896 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1897 newbp->b_lblkno = bp->b_lblkno; 1898 newbp->b_xflags |= BX_BKGRDMARKER; 1899 BO_LOCK(bp->b_bufobj); 1900 bp->b_vflags |= BV_BKGRDINPROG; 1901 bgetvp(bp->b_vp, newbp); 1902 BO_UNLOCK(bp->b_bufobj); 1903 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1904 newbp->b_blkno = bp->b_blkno; 1905 newbp->b_offset = bp->b_offset; 1906 newbp->b_iodone = ffs_backgroundwritedone; 1907 newbp->b_flags |= B_ASYNC; 1908 newbp->b_flags &= ~B_INVAL; 1909 1910 #ifdef SOFTUPDATES 1911 /* 1912 * Move over the dependencies. If there are rollbacks, 1913 * leave the parent buffer dirtied as it will need to 1914 * be written again. 1915 */ 1916 if (LIST_EMPTY(&bp->b_dep) || 1917 softdep_move_dependencies(bp, newbp) == 0) 1918 bundirty(bp); 1919 #else 1920 bundirty(bp); 1921 #endif 1922 1923 /* 1924 * Initiate write on the copy, release the original to 1925 * the B_LOCKED queue so that it cannot go away until 1926 * the background write completes. If not locked it could go 1927 * away and then be reconstituted while it was being written. 1928 * If the reconstituted buffer were written, we could end up 1929 * with two background copies being written at the same time. 1930 */ 1931 bqrelse(bp); 1932 bp = newbp; 1933 } else 1934 /* Mark the buffer clean */ 1935 bundirty(bp); 1936 1937 1938 /* Let the normal bufwrite do the rest for us */ 1939 normal_write: 1940 return (bufwrite(bp)); 1941 } 1942 1943 1944 static void 1945 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1946 { 1947 struct vnode *vp; 1948 int error; 1949 struct buf *tbp; 1950 int nocopy; 1951 1952 vp = bo->__bo_vnode; 1953 if (bp->b_iocmd == BIO_WRITE) { 1954 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 1955 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 1956 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 1957 panic("ffs_geom_strategy: bad I/O"); 1958 nocopy = bp->b_flags & B_NOCOPY; 1959 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 1960 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 1961 vp->v_rdev->si_snapdata != NULL) { 1962 if ((bp->b_flags & B_CLUSTER) != 0) { 1963 runningbufwakeup(bp); 1964 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 1965 b_cluster.cluster_entry) { 1966 error = ffs_copyonwrite(vp, tbp); 1967 if (error != 0 && 1968 error != EOPNOTSUPP) { 1969 bp->b_error = error; 1970 bp->b_ioflags |= BIO_ERROR; 1971 bufdone(bp); 1972 return; 1973 } 1974 } 1975 bp->b_runningbufspace = bp->b_bufsize; 1976 atomic_add_long(&runningbufspace, 1977 bp->b_runningbufspace); 1978 } else { 1979 error = ffs_copyonwrite(vp, bp); 1980 if (error != 0 && error != EOPNOTSUPP) { 1981 bp->b_error = error; 1982 bp->b_ioflags |= BIO_ERROR; 1983 bufdone(bp); 1984 return; 1985 } 1986 } 1987 } 1988 #ifdef SOFTUPDATES 1989 if ((bp->b_flags & B_CLUSTER) != 0) { 1990 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 1991 b_cluster.cluster_entry) { 1992 if (!LIST_EMPTY(&tbp->b_dep)) 1993 buf_start(tbp); 1994 } 1995 } else { 1996 if (!LIST_EMPTY(&bp->b_dep)) 1997 buf_start(bp); 1998 } 1999 2000 #endif 2001 } 2002 g_vfs_strategy(bo, bp); 2003 } 2004 2005 #ifdef DDB 2006 2007 static void 2008 db_print_ffs(struct ufsmount *ump) 2009 { 2010 db_printf("mp %p %s devvp %p fs %p su_wl %d su_wl_in %d su_deps %d " 2011 "su_req %d\n", 2012 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 2013 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 2014 ump->softdep_on_worklist_inprogress, ump->softdep_deps, 2015 ump->softdep_req); 2016 } 2017 2018 DB_SHOW_COMMAND(ffs, db_show_ffs) 2019 { 2020 struct mount *mp; 2021 struct ufsmount *ump; 2022 2023 if (have_addr) { 2024 ump = VFSTOUFS((struct mount *)addr); 2025 db_print_ffs(ump); 2026 return; 2027 } 2028 2029 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2030 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2031 db_print_ffs(VFSTOUFS(mp)); 2032 } 2033 } 2034 2035 #endif /* DDB */ 2036