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