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_mac.h" 36 #include "opt_quota.h" 37 #include "opt_ufs.h" 38 #include "opt_ffs.h" 39 #include "opt_ddb.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/namei.h> 44 #include <sys/priv.h> 45 #include <sys/proc.h> 46 #include <sys/kernel.h> 47 #include <sys/vnode.h> 48 #include <sys/mount.h> 49 #include <sys/bio.h> 50 #include <sys/buf.h> 51 #include <sys/conf.h> 52 #include <sys/fcntl.h> 53 #include <sys/malloc.h> 54 #include <sys/mutex.h> 55 56 #include <security/mac/mac_framework.h> 57 58 #include <ufs/ufs/extattr.h> 59 #include <ufs/ufs/gjournal.h> 60 #include <ufs/ufs/quota.h> 61 #include <ufs/ufs/ufsmount.h> 62 #include <ufs/ufs/inode.h> 63 #include <ufs/ufs/ufs_extern.h> 64 65 #include <ufs/ffs/fs.h> 66 #include <ufs/ffs/ffs_extern.h> 67 68 #include <vm/vm.h> 69 #include <vm/uma.h> 70 #include <vm/vm_page.h> 71 72 #include <geom/geom.h> 73 #include <geom/geom_vfs.h> 74 75 #include <ddb/ddb.h> 76 77 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 78 79 static int ffs_reload(struct mount *, struct thread *); 80 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 81 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 82 ufs2_daddr_t); 83 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 84 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 85 static vfs_init_t ffs_init; 86 static vfs_uninit_t ffs_uninit; 87 static vfs_extattrctl_t ffs_extattrctl; 88 static vfs_cmount_t ffs_cmount; 89 static vfs_unmount_t ffs_unmount; 90 static vfs_mount_t ffs_mount; 91 static vfs_statfs_t ffs_statfs; 92 static vfs_fhtovp_t ffs_fhtovp; 93 static vfs_sync_t ffs_sync; 94 95 static struct vfsops ufs_vfsops = { 96 .vfs_extattrctl = ffs_extattrctl, 97 .vfs_fhtovp = ffs_fhtovp, 98 .vfs_init = ffs_init, 99 .vfs_mount = ffs_mount, 100 .vfs_cmount = ffs_cmount, 101 .vfs_quotactl = ufs_quotactl, 102 .vfs_root = ufs_root, 103 .vfs_statfs = ffs_statfs, 104 .vfs_sync = ffs_sync, 105 .vfs_uninit = ffs_uninit, 106 .vfs_unmount = ffs_unmount, 107 .vfs_vget = ffs_vget, 108 .vfs_susp_clean = process_deferred_inactive, 109 }; 110 111 VFS_SET(ufs_vfsops, ufs, 0); 112 MODULE_VERSION(ufs, 1); 113 114 static b_strategy_t ffs_geom_strategy; 115 static b_write_t ffs_bufwrite; 116 117 static struct buf_ops ffs_ops = { 118 .bop_name = "FFS", 119 .bop_write = ffs_bufwrite, 120 .bop_strategy = ffs_geom_strategy, 121 .bop_sync = bufsync, 122 #ifdef NO_FFS_SNAPSHOT 123 .bop_bdflush = bufbdflush, 124 #else 125 .bop_bdflush = ffs_bdflush, 126 #endif 127 }; 128 129 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 130 "noclusterw", "noexec", "export", "force", "from", "multilabel", 131 "snapshot", "nosuid", "suiddir", "nosymfollow", "sync", 132 "union", NULL }; 133 134 static int 135 ffs_mount(struct mount *mp, struct thread *td) 136 { 137 struct vnode *devvp; 138 struct ufsmount *ump = 0; 139 struct fs *fs; 140 int error, flags; 141 u_int mntorflags, mntandnotflags; 142 accmode_t accmode; 143 struct nameidata ndp; 144 char *fspec; 145 146 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 mntandnotflags = 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 MNT_ILOCK(mp); 180 mp->mnt_flag = (mp->mnt_flag | mntorflags) & ~mntandnotflags; 181 MNT_IUNLOCK(mp); 182 /* 183 * If updating, check whether changing from read-only to 184 * read/write; if there is no device name, that's all we do. 185 */ 186 if (mp->mnt_flag & MNT_UPDATE) { 187 ump = VFSTOUFS(mp); 188 fs = ump->um_fs; 189 devvp = ump->um_devvp; 190 if (fs->fs_ronly == 0 && 191 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 192 /* 193 * Flush any dirty data and suspend filesystem. 194 */ 195 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 196 return (error); 197 for (;;) { 198 vn_finished_write(mp); 199 if ((error = vfs_write_suspend(mp)) != 0) 200 return (error); 201 MNT_ILOCK(mp); 202 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 203 /* 204 * Allow the secondary writes 205 * to proceed. 206 */ 207 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 208 MNTK_SUSPEND2); 209 wakeup(&mp->mnt_flag); 210 MNT_IUNLOCK(mp); 211 /* 212 * Allow the curthread to 213 * ignore the suspension to 214 * synchronize on-disk state. 215 */ 216 curthread->td_pflags |= TDP_IGNSUSP; 217 break; 218 } 219 MNT_IUNLOCK(mp); 220 vn_start_write(NULL, &mp, V_WAIT); 221 } 222 /* 223 * Check for and optionally get rid of files open 224 * for writing. 225 */ 226 flags = WRITECLOSE; 227 if (mp->mnt_flag & MNT_FORCE) 228 flags |= FORCECLOSE; 229 if (mp->mnt_flag & MNT_SOFTDEP) { 230 error = softdep_flushfiles(mp, flags, td); 231 } else { 232 error = ffs_flushfiles(mp, flags, td); 233 } 234 if (error) { 235 vfs_write_resume(mp); 236 return (error); 237 } 238 if (fs->fs_pendingblocks != 0 || 239 fs->fs_pendinginodes != 0) { 240 printf("%s: %s: blocks %jd files %d\n", 241 fs->fs_fsmnt, "update error", 242 (intmax_t)fs->fs_pendingblocks, 243 fs->fs_pendinginodes); 244 fs->fs_pendingblocks = 0; 245 fs->fs_pendinginodes = 0; 246 } 247 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 248 fs->fs_clean = 1; 249 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 250 fs->fs_ronly = 0; 251 fs->fs_clean = 0; 252 vfs_write_resume(mp); 253 return (error); 254 } 255 DROP_GIANT(); 256 g_topology_lock(); 257 g_access(ump->um_cp, 0, -1, 0); 258 g_topology_unlock(); 259 PICKUP_GIANT(); 260 fs->fs_ronly = 1; 261 MNT_ILOCK(mp); 262 mp->mnt_flag |= MNT_RDONLY; 263 MNT_IUNLOCK(mp); 264 /* 265 * Allow the writers to note that filesystem 266 * is ro now. 267 */ 268 vfs_write_resume(mp); 269 } 270 if ((mp->mnt_flag & MNT_RELOAD) && 271 (error = ffs_reload(mp, td)) != 0) 272 return (error); 273 if (fs->fs_ronly && 274 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 275 /* 276 * If upgrade to read-write by non-root, then verify 277 * that user has necessary permissions on the device. 278 */ 279 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 280 error = VOP_ACCESS(devvp, VREAD | VWRITE, 281 td->td_ucred, td); 282 if (error) 283 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 284 if (error) { 285 VOP_UNLOCK(devvp, 0); 286 return (error); 287 } 288 VOP_UNLOCK(devvp, 0); 289 fs->fs_flags &= ~FS_UNCLEAN; 290 if (fs->fs_clean == 0) { 291 fs->fs_flags |= FS_UNCLEAN; 292 if ((mp->mnt_flag & MNT_FORCE) || 293 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 294 (fs->fs_flags & FS_DOSOFTDEP))) { 295 printf("WARNING: %s was not %s\n", 296 fs->fs_fsmnt, "properly dismounted"); 297 } else { 298 printf( 299 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 300 fs->fs_fsmnt); 301 return (EPERM); 302 } 303 } 304 DROP_GIANT(); 305 g_topology_lock(); 306 /* 307 * If we're the root device, we may not have an E count 308 * yet, get it now. 309 */ 310 if (ump->um_cp->ace == 0) 311 error = g_access(ump->um_cp, 0, 1, 1); 312 else 313 error = g_access(ump->um_cp, 0, 1, 0); 314 g_topology_unlock(); 315 PICKUP_GIANT(); 316 if (error) 317 return (error); 318 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 319 return (error); 320 fs->fs_ronly = 0; 321 MNT_ILOCK(mp); 322 mp->mnt_flag &= ~MNT_RDONLY; 323 MNT_IUNLOCK(mp); 324 fs->fs_clean = 0; 325 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 326 vn_finished_write(mp); 327 return (error); 328 } 329 /* check to see if we need to start softdep */ 330 if ((fs->fs_flags & FS_DOSOFTDEP) && 331 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 332 vn_finished_write(mp); 333 return (error); 334 } 335 if (fs->fs_snapinum[0] != 0) 336 ffs_snapshot_mount(mp); 337 vn_finished_write(mp); 338 } 339 /* 340 * Soft updates is incompatible with "async", 341 * so if we are doing softupdates stop the user 342 * from setting the async flag in an update. 343 * Softdep_mount() clears it in an initial mount 344 * or ro->rw remount. 345 */ 346 if (mp->mnt_flag & MNT_SOFTDEP) { 347 /* XXX: Reset too late ? */ 348 MNT_ILOCK(mp); 349 mp->mnt_flag &= ~MNT_ASYNC; 350 MNT_IUNLOCK(mp); 351 } 352 /* 353 * Keep MNT_ACLS flag if it is stored in superblock. 354 */ 355 if ((fs->fs_flags & FS_ACLS) != 0) { 356 /* XXX: Set too late ? */ 357 MNT_ILOCK(mp); 358 mp->mnt_flag |= MNT_ACLS; 359 MNT_IUNLOCK(mp); 360 } 361 362 /* 363 * If this is a snapshot request, take the snapshot. 364 */ 365 if (mp->mnt_flag & MNT_SNAPSHOT) 366 return (ffs_snapshot(mp, fspec)); 367 } 368 369 /* 370 * Not an update, or updating the name: look up the name 371 * and verify that it refers to a sensible disk device. 372 */ 373 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 374 if ((error = namei(&ndp)) != 0) 375 return (error); 376 NDFREE(&ndp, NDF_ONLY_PNBUF); 377 devvp = ndp.ni_vp; 378 if (!vn_isdisk(devvp, &error)) { 379 vput(devvp); 380 return (error); 381 } 382 383 /* 384 * If mount by non-root, then verify that user has necessary 385 * permissions on the device. 386 */ 387 accmode = VREAD; 388 if ((mp->mnt_flag & MNT_RDONLY) == 0) 389 accmode |= VWRITE; 390 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 391 if (error) 392 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 393 if (error) { 394 vput(devvp); 395 return (error); 396 } 397 398 if (mp->mnt_flag & MNT_UPDATE) { 399 /* 400 * Update only 401 * 402 * If it's not the same vnode, or at least the same device 403 * then it's not correct. 404 */ 405 406 if (devvp->v_rdev != ump->um_devvp->v_rdev) 407 error = EINVAL; /* needs translation */ 408 vput(devvp); 409 if (error) 410 return (error); 411 } else { 412 /* 413 * New mount 414 * 415 * We need the name for the mount point (also used for 416 * "last mounted on") copied in. If an error occurs, 417 * the mount point is discarded by the upper level code. 418 * Note that vfs_mount() populates f_mntonname for us. 419 */ 420 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 421 vrele(devvp); 422 return (error); 423 } 424 } 425 vfs_mountedfrom(mp, fspec); 426 return (0); 427 } 428 429 /* 430 * Compatibility with old mount system call. 431 */ 432 433 static int 434 ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 435 { 436 struct ufs_args args; 437 int error; 438 439 if (data == NULL) 440 return (EINVAL); 441 error = copyin(data, &args, sizeof args); 442 if (error) 443 return (error); 444 445 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 446 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 447 error = kernel_mount(ma, flags); 448 449 return (error); 450 } 451 452 /* 453 * Reload all incore data for a filesystem (used after running fsck on 454 * the root filesystem and finding things to fix). The filesystem must 455 * be mounted read-only. 456 * 457 * Things to do to update the mount: 458 * 1) invalidate all cached meta-data. 459 * 2) re-read superblock from disk. 460 * 3) re-read summary information from disk. 461 * 4) invalidate all inactive vnodes. 462 * 5) invalidate all cached file data. 463 * 6) re-read inode data for all active vnodes. 464 */ 465 static int 466 ffs_reload(struct mount *mp, struct thread *td) 467 { 468 struct vnode *vp, *mvp, *devvp; 469 struct inode *ip; 470 void *space; 471 struct buf *bp; 472 struct fs *fs, *newfs; 473 struct ufsmount *ump; 474 ufs2_daddr_t sblockloc; 475 int i, blks, size, error; 476 int32_t *lp; 477 478 if ((mp->mnt_flag & MNT_RDONLY) == 0) 479 return (EINVAL); 480 ump = VFSTOUFS(mp); 481 /* 482 * Step 1: invalidate all cached meta-data. 483 */ 484 devvp = VFSTOUFS(mp)->um_devvp; 485 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 486 if (vinvalbuf(devvp, 0, 0, 0) != 0) 487 panic("ffs_reload: dirty1"); 488 VOP_UNLOCK(devvp, 0); 489 490 /* 491 * Step 2: re-read superblock from disk. 492 */ 493 fs = VFSTOUFS(mp)->um_fs; 494 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 495 NOCRED, &bp)) != 0) 496 return (error); 497 newfs = (struct fs *)bp->b_data; 498 if ((newfs->fs_magic != FS_UFS1_MAGIC && 499 newfs->fs_magic != FS_UFS2_MAGIC) || 500 newfs->fs_bsize > MAXBSIZE || 501 newfs->fs_bsize < sizeof(struct fs)) { 502 brelse(bp); 503 return (EIO); /* XXX needs translation */ 504 } 505 /* 506 * Copy pointer fields back into superblock before copying in XXX 507 * new superblock. These should really be in the ufsmount. XXX 508 * Note that important parameters (eg fs_ncg) are unchanged. 509 */ 510 newfs->fs_csp = fs->fs_csp; 511 newfs->fs_maxcluster = fs->fs_maxcluster; 512 newfs->fs_contigdirs = fs->fs_contigdirs; 513 newfs->fs_active = fs->fs_active; 514 /* The file system is still read-only. */ 515 newfs->fs_ronly = 1; 516 sblockloc = fs->fs_sblockloc; 517 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 518 brelse(bp); 519 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 520 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 521 UFS_LOCK(ump); 522 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 523 printf("%s: reload pending error: blocks %jd files %d\n", 524 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 525 fs->fs_pendinginodes); 526 fs->fs_pendingblocks = 0; 527 fs->fs_pendinginodes = 0; 528 } 529 UFS_UNLOCK(ump); 530 531 /* 532 * Step 3: re-read summary information from disk. 533 */ 534 blks = howmany(fs->fs_cssize, fs->fs_fsize); 535 space = fs->fs_csp; 536 for (i = 0; i < blks; i += fs->fs_frag) { 537 size = fs->fs_bsize; 538 if (i + fs->fs_frag > blks) 539 size = (blks - i) * fs->fs_fsize; 540 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 541 NOCRED, &bp); 542 if (error) 543 return (error); 544 bcopy(bp->b_data, space, (u_int)size); 545 space = (char *)space + size; 546 brelse(bp); 547 } 548 /* 549 * We no longer know anything about clusters per cylinder group. 550 */ 551 if (fs->fs_contigsumsize > 0) { 552 lp = fs->fs_maxcluster; 553 for (i = 0; i < fs->fs_ncg; i++) 554 *lp++ = fs->fs_contigsumsize; 555 } 556 557 loop: 558 MNT_ILOCK(mp); 559 MNT_VNODE_FOREACH(vp, mp, mvp) { 560 VI_LOCK(vp); 561 if (vp->v_iflag & VI_DOOMED) { 562 VI_UNLOCK(vp); 563 continue; 564 } 565 MNT_IUNLOCK(mp); 566 /* 567 * Step 4: invalidate all cached file data. 568 */ 569 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 570 MNT_VNODE_FOREACH_ABORT(mp, mvp); 571 goto loop; 572 } 573 if (vinvalbuf(vp, 0, 0, 0)) 574 panic("ffs_reload: dirty2"); 575 /* 576 * Step 5: re-read inode data for all active vnodes. 577 */ 578 ip = VTOI(vp); 579 error = 580 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 581 (int)fs->fs_bsize, NOCRED, &bp); 582 if (error) { 583 VOP_UNLOCK(vp, 0); 584 vrele(vp); 585 MNT_VNODE_FOREACH_ABORT(mp, mvp); 586 return (error); 587 } 588 ffs_load_inode(bp, ip, fs, ip->i_number); 589 ip->i_effnlink = ip->i_nlink; 590 brelse(bp); 591 VOP_UNLOCK(vp, 0); 592 vrele(vp); 593 MNT_ILOCK(mp); 594 } 595 MNT_IUNLOCK(mp); 596 return (0); 597 } 598 599 /* 600 * Possible superblock locations ordered from most to least likely. 601 */ 602 static int sblock_try[] = SBLOCKSEARCH; 603 604 /* 605 * Common code for mount and mountroot 606 */ 607 static int 608 ffs_mountfs(devvp, mp, td) 609 struct vnode *devvp; 610 struct mount *mp; 611 struct thread *td; 612 { 613 struct ufsmount *ump; 614 struct buf *bp; 615 struct fs *fs; 616 struct cdev *dev; 617 void *space; 618 ufs2_daddr_t sblockloc; 619 int error, i, blks, size, ronly; 620 int32_t *lp; 621 struct ucred *cred; 622 struct g_consumer *cp; 623 struct mount *nmp; 624 625 dev = devvp->v_rdev; 626 cred = td ? td->td_ucred : NOCRED; 627 628 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 629 DROP_GIANT(); 630 g_topology_lock(); 631 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 632 633 /* 634 * If we are a root mount, drop the E flag so fsck can do its magic. 635 * We will pick it up again when we remount R/W. 636 */ 637 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 638 error = g_access(cp, 0, 0, -1); 639 g_topology_unlock(); 640 PICKUP_GIANT(); 641 VOP_UNLOCK(devvp, 0); 642 if (error) 643 return (error); 644 if (devvp->v_rdev->si_iosize_max != 0) 645 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 646 if (mp->mnt_iosize_max > MAXPHYS) 647 mp->mnt_iosize_max = MAXPHYS; 648 649 devvp->v_bufobj.bo_private = cp; 650 devvp->v_bufobj.bo_ops = &ffs_ops; 651 652 bp = NULL; 653 ump = NULL; 654 fs = NULL; 655 sblockloc = 0; 656 /* 657 * Try reading the superblock in each of its possible locations. 658 */ 659 for (i = 0; sblock_try[i] != -1; i++) { 660 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 661 error = EINVAL; 662 vfs_mount_error(mp, 663 "Invalid sectorsize %d for superblock size %d", 664 cp->provider->sectorsize, SBLOCKSIZE); 665 goto out; 666 } 667 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 668 cred, &bp)) != 0) 669 goto out; 670 fs = (struct fs *)bp->b_data; 671 sblockloc = sblock_try[i]; 672 if ((fs->fs_magic == FS_UFS1_MAGIC || 673 (fs->fs_magic == FS_UFS2_MAGIC && 674 (fs->fs_sblockloc == sblockloc || 675 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 676 fs->fs_bsize <= MAXBSIZE && 677 fs->fs_bsize >= sizeof(struct fs)) 678 break; 679 brelse(bp); 680 bp = NULL; 681 } 682 if (sblock_try[i] == -1) { 683 error = EINVAL; /* XXX needs translation */ 684 goto out; 685 } 686 fs->fs_fmod = 0; 687 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 688 fs->fs_flags &= ~FS_UNCLEAN; 689 if (fs->fs_clean == 0) { 690 fs->fs_flags |= FS_UNCLEAN; 691 if (ronly || (mp->mnt_flag & MNT_FORCE) || 692 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 693 (fs->fs_flags & FS_DOSOFTDEP))) { 694 printf( 695 "WARNING: %s was not properly dismounted\n", 696 fs->fs_fsmnt); 697 } else { 698 printf( 699 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 700 fs->fs_fsmnt); 701 error = EPERM; 702 goto out; 703 } 704 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 705 (mp->mnt_flag & MNT_FORCE)) { 706 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 707 (intmax_t)fs->fs_pendingblocks, 708 fs->fs_pendinginodes); 709 fs->fs_pendingblocks = 0; 710 fs->fs_pendinginodes = 0; 711 } 712 } 713 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 714 printf("%s: mount pending error: blocks %jd files %d\n", 715 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 716 fs->fs_pendinginodes); 717 fs->fs_pendingblocks = 0; 718 fs->fs_pendinginodes = 0; 719 } 720 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 721 #ifdef UFS_GJOURNAL 722 /* 723 * Get journal provider name. 724 */ 725 size = 1024; 726 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 727 if (g_io_getattr("GJOURNAL::provider", cp, &size, 728 mp->mnt_gjprovider) == 0) { 729 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 730 M_UFSMNT, M_WAITOK); 731 MNT_ILOCK(mp); 732 mp->mnt_flag |= MNT_GJOURNAL; 733 MNT_IUNLOCK(mp); 734 } else { 735 printf( 736 "WARNING: %s: GJOURNAL flag on fs but no gjournal provider below\n", 737 mp->mnt_stat.f_mntonname); 738 free(mp->mnt_gjprovider, M_UFSMNT); 739 mp->mnt_gjprovider = NULL; 740 } 741 #else 742 printf( 743 "WARNING: %s: GJOURNAL flag on fs but no UFS_GJOURNAL support\n", 744 mp->mnt_stat.f_mntonname); 745 #endif 746 } else { 747 mp->mnt_gjprovider = NULL; 748 } 749 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 750 ump->um_cp = cp; 751 ump->um_bo = &devvp->v_bufobj; 752 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 753 if (fs->fs_magic == FS_UFS1_MAGIC) { 754 ump->um_fstype = UFS1; 755 ump->um_balloc = ffs_balloc_ufs1; 756 } else { 757 ump->um_fstype = UFS2; 758 ump->um_balloc = ffs_balloc_ufs2; 759 } 760 ump->um_blkatoff = ffs_blkatoff; 761 ump->um_truncate = ffs_truncate; 762 ump->um_update = ffs_update; 763 ump->um_valloc = ffs_valloc; 764 ump->um_vfree = ffs_vfree; 765 ump->um_ifree = ffs_ifree; 766 ump->um_rdonly = ffs_rdonly; 767 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 768 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 769 if (fs->fs_sbsize < SBLOCKSIZE) 770 bp->b_flags |= B_INVAL | B_NOCACHE; 771 brelse(bp); 772 bp = NULL; 773 fs = ump->um_fs; 774 ffs_oldfscompat_read(fs, ump, sblockloc); 775 fs->fs_ronly = ronly; 776 size = fs->fs_cssize; 777 blks = howmany(size, fs->fs_fsize); 778 if (fs->fs_contigsumsize > 0) 779 size += fs->fs_ncg * sizeof(int32_t); 780 size += fs->fs_ncg * sizeof(u_int8_t); 781 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 782 fs->fs_csp = space; 783 for (i = 0; i < blks; i += fs->fs_frag) { 784 size = fs->fs_bsize; 785 if (i + fs->fs_frag > blks) 786 size = (blks - i) * fs->fs_fsize; 787 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 788 cred, &bp)) != 0) { 789 free(fs->fs_csp, M_UFSMNT); 790 goto out; 791 } 792 bcopy(bp->b_data, space, (u_int)size); 793 space = (char *)space + size; 794 brelse(bp); 795 bp = NULL; 796 } 797 if (fs->fs_contigsumsize > 0) { 798 fs->fs_maxcluster = lp = space; 799 for (i = 0; i < fs->fs_ncg; i++) 800 *lp++ = fs->fs_contigsumsize; 801 space = lp; 802 } 803 size = fs->fs_ncg * sizeof(u_int8_t); 804 fs->fs_contigdirs = (u_int8_t *)space; 805 bzero(fs->fs_contigdirs, size); 806 fs->fs_active = NULL; 807 mp->mnt_data = ump; 808 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 809 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 810 nmp = NULL; 811 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 812 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 813 if (nmp) 814 vfs_rel(nmp); 815 vfs_getnewfsid(mp); 816 } 817 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 818 MNT_ILOCK(mp); 819 mp->mnt_flag |= MNT_LOCAL; 820 MNT_IUNLOCK(mp); 821 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 822 #ifdef MAC 823 MNT_ILOCK(mp); 824 mp->mnt_flag |= MNT_MULTILABEL; 825 MNT_IUNLOCK(mp); 826 #else 827 printf( 828 "WARNING: %s: multilabel flag on fs but no MAC support\n", 829 mp->mnt_stat.f_mntonname); 830 #endif 831 } 832 if ((fs->fs_flags & FS_ACLS) != 0) { 833 #ifdef UFS_ACL 834 MNT_ILOCK(mp); 835 mp->mnt_flag |= MNT_ACLS; 836 MNT_IUNLOCK(mp); 837 #else 838 printf( 839 "WARNING: %s: ACLs flag on fs but no ACLs support\n", 840 mp->mnt_stat.f_mntonname); 841 #endif 842 } 843 ump->um_mountp = mp; 844 ump->um_dev = dev; 845 ump->um_devvp = devvp; 846 ump->um_nindir = fs->fs_nindir; 847 ump->um_bptrtodb = fs->fs_fsbtodb; 848 ump->um_seqinc = fs->fs_frag; 849 for (i = 0; i < MAXQUOTAS; i++) 850 ump->um_quotas[i] = NULLVP; 851 #ifdef UFS_EXTATTR 852 ufs_extattr_uepm_init(&ump->um_extattr); 853 #endif 854 /* 855 * Set FS local "last mounted on" information (NULL pad) 856 */ 857 bzero(fs->fs_fsmnt, MAXMNTLEN); 858 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 859 860 if( mp->mnt_flag & MNT_ROOTFS) { 861 /* 862 * Root mount; update timestamp in mount structure. 863 * this will be used by the common root mount code 864 * to update the system clock. 865 */ 866 mp->mnt_time = fs->fs_time; 867 } 868 869 if (ronly == 0) { 870 if ((fs->fs_flags & FS_DOSOFTDEP) && 871 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 872 free(fs->fs_csp, M_UFSMNT); 873 goto out; 874 } 875 if (fs->fs_snapinum[0] != 0) 876 ffs_snapshot_mount(mp); 877 fs->fs_fmod = 1; 878 fs->fs_clean = 0; 879 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 880 } 881 /* 882 * Initialize filesystem stat information in mount struct. 883 */ 884 MNT_ILOCK(mp); 885 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED; 886 MNT_IUNLOCK(mp); 887 #ifdef UFS_EXTATTR 888 #ifdef UFS_EXTATTR_AUTOSTART 889 /* 890 * 891 * Auto-starting does the following: 892 * - check for /.attribute in the fs, and extattr_start if so 893 * - for each file in .attribute, enable that file with 894 * an attribute of the same name. 895 * Not clear how to report errors -- probably eat them. 896 * This would all happen while the filesystem was busy/not 897 * available, so would effectively be "atomic". 898 */ 899 mp->mnt_stat.f_iosize = fs->fs_bsize; 900 (void) ufs_extattr_autostart(mp, td); 901 #endif /* !UFS_EXTATTR_AUTOSTART */ 902 #endif /* !UFS_EXTATTR */ 903 return (0); 904 out: 905 if (bp) 906 brelse(bp); 907 if (cp != NULL) { 908 DROP_GIANT(); 909 g_topology_lock(); 910 g_vfs_close(cp); 911 g_topology_unlock(); 912 PICKUP_GIANT(); 913 } 914 if (ump) { 915 mtx_destroy(UFS_MTX(ump)); 916 if (mp->mnt_gjprovider != NULL) { 917 free(mp->mnt_gjprovider, M_UFSMNT); 918 mp->mnt_gjprovider = NULL; 919 } 920 free(ump->um_fs, M_UFSMNT); 921 free(ump, M_UFSMNT); 922 mp->mnt_data = NULL; 923 } 924 return (error); 925 } 926 927 #include <sys/sysctl.h> 928 static int bigcgs = 0; 929 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 930 931 /* 932 * Sanity checks for loading old filesystem superblocks. 933 * See ffs_oldfscompat_write below for unwound actions. 934 * 935 * XXX - Parts get retired eventually. 936 * Unfortunately new bits get added. 937 */ 938 static void 939 ffs_oldfscompat_read(fs, ump, sblockloc) 940 struct fs *fs; 941 struct ufsmount *ump; 942 ufs2_daddr_t sblockloc; 943 { 944 off_t maxfilesize; 945 946 /* 947 * If not yet done, update fs_flags location and value of fs_sblockloc. 948 */ 949 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 950 fs->fs_flags = fs->fs_old_flags; 951 fs->fs_old_flags |= FS_FLAGS_UPDATED; 952 fs->fs_sblockloc = sblockloc; 953 } 954 /* 955 * If not yet done, update UFS1 superblock with new wider fields. 956 */ 957 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 958 fs->fs_maxbsize = fs->fs_bsize; 959 fs->fs_time = fs->fs_old_time; 960 fs->fs_size = fs->fs_old_size; 961 fs->fs_dsize = fs->fs_old_dsize; 962 fs->fs_csaddr = fs->fs_old_csaddr; 963 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 964 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 965 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 966 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 967 } 968 if (fs->fs_magic == FS_UFS1_MAGIC && 969 fs->fs_old_inodefmt < FS_44INODEFMT) { 970 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 971 fs->fs_qbmask = ~fs->fs_bmask; 972 fs->fs_qfmask = ~fs->fs_fmask; 973 } 974 if (fs->fs_magic == FS_UFS1_MAGIC) { 975 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 976 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 977 if (fs->fs_maxfilesize > maxfilesize) 978 fs->fs_maxfilesize = maxfilesize; 979 } 980 /* Compatibility for old filesystems */ 981 if (fs->fs_avgfilesize <= 0) 982 fs->fs_avgfilesize = AVFILESIZ; 983 if (fs->fs_avgfpdir <= 0) 984 fs->fs_avgfpdir = AFPDIR; 985 if (bigcgs) { 986 fs->fs_save_cgsize = fs->fs_cgsize; 987 fs->fs_cgsize = fs->fs_bsize; 988 } 989 } 990 991 /* 992 * Unwinding superblock updates for old filesystems. 993 * See ffs_oldfscompat_read above for details. 994 * 995 * XXX - Parts get retired eventually. 996 * Unfortunately new bits get added. 997 */ 998 static void 999 ffs_oldfscompat_write(fs, ump) 1000 struct fs *fs; 1001 struct ufsmount *ump; 1002 { 1003 1004 /* 1005 * Copy back UFS2 updated fields that UFS1 inspects. 1006 */ 1007 if (fs->fs_magic == FS_UFS1_MAGIC) { 1008 fs->fs_old_time = fs->fs_time; 1009 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1010 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1011 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1012 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1013 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1014 } 1015 if (bigcgs) { 1016 fs->fs_cgsize = fs->fs_save_cgsize; 1017 fs->fs_save_cgsize = 0; 1018 } 1019 } 1020 1021 /* 1022 * unmount system call 1023 */ 1024 static int 1025 ffs_unmount(mp, mntflags, td) 1026 struct mount *mp; 1027 int mntflags; 1028 struct thread *td; 1029 { 1030 struct ufsmount *ump = VFSTOUFS(mp); 1031 struct fs *fs; 1032 int error, flags, susp; 1033 #ifdef UFS_EXTATTR 1034 int e_restart; 1035 #endif 1036 1037 flags = 0; 1038 fs = ump->um_fs; 1039 if (mntflags & MNT_FORCE) { 1040 flags |= FORCECLOSE; 1041 susp = fs->fs_ronly != 0; 1042 } else 1043 susp = 0; 1044 #ifdef UFS_EXTATTR 1045 if ((error = ufs_extattr_stop(mp, td))) { 1046 if (error != EOPNOTSUPP) 1047 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 1048 error); 1049 e_restart = 0; 1050 } else { 1051 ufs_extattr_uepm_destroy(&ump->um_extattr); 1052 e_restart = 1; 1053 } 1054 #endif 1055 if (susp) { 1056 /* 1057 * dounmount already called vn_start_write(). 1058 */ 1059 for (;;) { 1060 vn_finished_write(mp); 1061 if ((error = vfs_write_suspend(mp)) != 0) 1062 return (error); 1063 MNT_ILOCK(mp); 1064 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1065 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1066 MNTK_SUSPEND2); 1067 wakeup(&mp->mnt_flag); 1068 MNT_IUNLOCK(mp); 1069 curthread->td_pflags |= TDP_IGNSUSP; 1070 break; 1071 } 1072 MNT_IUNLOCK(mp); 1073 vn_start_write(NULL, &mp, V_WAIT); 1074 } 1075 } 1076 if (mp->mnt_flag & MNT_SOFTDEP) { 1077 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 1078 goto fail; 1079 } else { 1080 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 1081 goto fail; 1082 } 1083 UFS_LOCK(ump); 1084 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1085 printf("%s: unmount pending error: blocks %jd files %d\n", 1086 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1087 fs->fs_pendinginodes); 1088 fs->fs_pendingblocks = 0; 1089 fs->fs_pendinginodes = 0; 1090 } 1091 UFS_UNLOCK(ump); 1092 if (fs->fs_ronly == 0) { 1093 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1094 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1095 if (error) { 1096 fs->fs_clean = 0; 1097 goto fail; 1098 } 1099 } 1100 if (susp) { 1101 vfs_write_resume(mp); 1102 vn_start_write(NULL, &mp, V_WAIT); 1103 } 1104 DROP_GIANT(); 1105 g_topology_lock(); 1106 g_vfs_close(ump->um_cp); 1107 g_topology_unlock(); 1108 PICKUP_GIANT(); 1109 vrele(ump->um_devvp); 1110 mtx_destroy(UFS_MTX(ump)); 1111 if (mp->mnt_gjprovider != NULL) { 1112 free(mp->mnt_gjprovider, M_UFSMNT); 1113 mp->mnt_gjprovider = NULL; 1114 } 1115 free(fs->fs_csp, M_UFSMNT); 1116 free(fs, M_UFSMNT); 1117 free(ump, M_UFSMNT); 1118 mp->mnt_data = NULL; 1119 MNT_ILOCK(mp); 1120 mp->mnt_flag &= ~MNT_LOCAL; 1121 MNT_IUNLOCK(mp); 1122 return (error); 1123 1124 fail: 1125 if (susp) { 1126 vfs_write_resume(mp); 1127 vn_start_write(NULL, &mp, V_WAIT); 1128 } 1129 #ifdef UFS_EXTATTR 1130 if (e_restart) { 1131 ufs_extattr_uepm_init(&ump->um_extattr); 1132 #ifdef UFS_EXTATTR_AUTOSTART 1133 (void) ufs_extattr_autostart(mp, td); 1134 #endif 1135 } 1136 #endif 1137 1138 return (error); 1139 } 1140 1141 /* 1142 * Flush out all the files in a filesystem. 1143 */ 1144 int 1145 ffs_flushfiles(mp, flags, td) 1146 struct mount *mp; 1147 int flags; 1148 struct thread *td; 1149 { 1150 struct ufsmount *ump; 1151 int error; 1152 1153 ump = VFSTOUFS(mp); 1154 #ifdef QUOTA 1155 if (mp->mnt_flag & MNT_QUOTA) { 1156 int i; 1157 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1158 if (error) 1159 return (error); 1160 for (i = 0; i < MAXQUOTAS; i++) { 1161 quotaoff(td, mp, i); 1162 } 1163 /* 1164 * Here we fall through to vflush again to ensure 1165 * that we have gotten rid of all the system vnodes. 1166 */ 1167 } 1168 #endif 1169 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1170 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1171 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1172 return (error); 1173 ffs_snapshot_unmount(mp); 1174 flags |= FORCECLOSE; 1175 /* 1176 * Here we fall through to vflush again to ensure 1177 * that we have gotten rid of all the system vnodes. 1178 */ 1179 } 1180 /* 1181 * Flush all the files. 1182 */ 1183 if ((error = vflush(mp, 0, flags, td)) != 0) 1184 return (error); 1185 /* 1186 * Flush filesystem metadata. 1187 */ 1188 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1189 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1190 VOP_UNLOCK(ump->um_devvp, 0); 1191 return (error); 1192 } 1193 1194 /* 1195 * Get filesystem statistics. 1196 */ 1197 static int 1198 ffs_statfs(mp, sbp, td) 1199 struct mount *mp; 1200 struct statfs *sbp; 1201 struct thread *td; 1202 { 1203 struct ufsmount *ump; 1204 struct fs *fs; 1205 1206 ump = VFSTOUFS(mp); 1207 fs = ump->um_fs; 1208 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1209 panic("ffs_statfs"); 1210 sbp->f_version = STATFS_VERSION; 1211 sbp->f_bsize = fs->fs_fsize; 1212 sbp->f_iosize = fs->fs_bsize; 1213 sbp->f_blocks = fs->fs_dsize; 1214 UFS_LOCK(ump); 1215 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1216 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1217 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1218 dbtofsb(fs, fs->fs_pendingblocks); 1219 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1220 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1221 UFS_UNLOCK(ump); 1222 sbp->f_namemax = NAME_MAX; 1223 return (0); 1224 } 1225 1226 /* 1227 * Go through the disk queues to initiate sandbagged IO; 1228 * go through the inodes to write those that have been modified; 1229 * initiate the writing of the super block if it has been modified. 1230 * 1231 * Note: we are always called with the filesystem marked `MPBUSY'. 1232 */ 1233 static int 1234 ffs_sync(mp, waitfor, td) 1235 struct mount *mp; 1236 int waitfor; 1237 struct thread *td; 1238 { 1239 struct vnode *mvp, *vp, *devvp; 1240 struct inode *ip; 1241 struct ufsmount *ump = VFSTOUFS(mp); 1242 struct fs *fs; 1243 int error, count, wait, lockreq, allerror = 0; 1244 int suspend; 1245 int suspended; 1246 int secondary_writes; 1247 int secondary_accwrites; 1248 int softdep_deps; 1249 int softdep_accdeps; 1250 struct bufobj *bo; 1251 1252 fs = ump->um_fs; 1253 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1254 printf("fs = %s\n", fs->fs_fsmnt); 1255 panic("ffs_sync: rofs mod"); 1256 } 1257 /* 1258 * Write back each (modified) inode. 1259 */ 1260 wait = 0; 1261 suspend = 0; 1262 suspended = 0; 1263 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1264 if (waitfor == MNT_SUSPEND) { 1265 suspend = 1; 1266 waitfor = MNT_WAIT; 1267 } 1268 if (waitfor == MNT_WAIT) { 1269 wait = 1; 1270 lockreq = LK_EXCLUSIVE; 1271 } 1272 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1273 MNT_ILOCK(mp); 1274 loop: 1275 /* Grab snapshot of secondary write counts */ 1276 secondary_writes = mp->mnt_secondary_writes; 1277 secondary_accwrites = mp->mnt_secondary_accwrites; 1278 1279 /* Grab snapshot of softdep dependency counts */ 1280 MNT_IUNLOCK(mp); 1281 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1282 MNT_ILOCK(mp); 1283 1284 MNT_VNODE_FOREACH(vp, mp, mvp) { 1285 /* 1286 * Depend on the mntvnode_slock to keep things stable enough 1287 * for a quick test. Since there might be hundreds of 1288 * thousands of vnodes, we cannot afford even a subroutine 1289 * call unless there's a good chance that we have work to do. 1290 */ 1291 VI_LOCK(vp); 1292 if (vp->v_iflag & VI_DOOMED) { 1293 VI_UNLOCK(vp); 1294 continue; 1295 } 1296 ip = VTOI(vp); 1297 if (vp->v_type == VNON || ((ip->i_flag & 1298 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1299 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1300 VI_UNLOCK(vp); 1301 continue; 1302 } 1303 MNT_IUNLOCK(mp); 1304 if ((error = vget(vp, lockreq, td)) != 0) { 1305 MNT_ILOCK(mp); 1306 if (error == ENOENT || error == ENOLCK) { 1307 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1308 goto loop; 1309 } 1310 continue; 1311 } 1312 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1313 allerror = error; 1314 vput(vp); 1315 MNT_ILOCK(mp); 1316 } 1317 MNT_IUNLOCK(mp); 1318 /* 1319 * Force stale filesystem control information to be flushed. 1320 */ 1321 if (waitfor == MNT_WAIT) { 1322 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1323 allerror = error; 1324 /* Flushed work items may create new vnodes to clean */ 1325 if (allerror == 0 && count) { 1326 MNT_ILOCK(mp); 1327 goto loop; 1328 } 1329 } 1330 #ifdef QUOTA 1331 qsync(mp); 1332 #endif 1333 devvp = ump->um_devvp; 1334 bo = &devvp->v_bufobj; 1335 BO_LOCK(bo); 1336 if (waitfor != MNT_LAZY && 1337 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1338 BO_UNLOCK(bo); 1339 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1340 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1341 allerror = error; 1342 VOP_UNLOCK(devvp, 0); 1343 if (allerror == 0 && waitfor == MNT_WAIT) { 1344 MNT_ILOCK(mp); 1345 goto loop; 1346 } 1347 } else if (suspend != 0) { 1348 if (softdep_check_suspend(mp, 1349 devvp, 1350 softdep_deps, 1351 softdep_accdeps, 1352 secondary_writes, 1353 secondary_accwrites) != 0) 1354 goto loop; /* More work needed */ 1355 mtx_assert(MNT_MTX(mp), MA_OWNED); 1356 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1357 MNT_IUNLOCK(mp); 1358 suspended = 1; 1359 } else 1360 BO_UNLOCK(bo); 1361 /* 1362 * Write back modified superblock. 1363 */ 1364 if (fs->fs_fmod != 0 && 1365 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1366 allerror = error; 1367 return (allerror); 1368 } 1369 1370 int 1371 ffs_vget(mp, ino, flags, vpp) 1372 struct mount *mp; 1373 ino_t ino; 1374 int flags; 1375 struct vnode **vpp; 1376 { 1377 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1378 } 1379 1380 int 1381 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1382 struct mount *mp; 1383 ino_t ino; 1384 int flags; 1385 struct vnode **vpp; 1386 int ffs_flags; 1387 { 1388 struct fs *fs; 1389 struct inode *ip; 1390 struct ufsmount *ump; 1391 struct buf *bp; 1392 struct vnode *vp; 1393 struct cdev *dev; 1394 int error; 1395 1396 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1397 if (error || *vpp != NULL) 1398 return (error); 1399 1400 /* 1401 * We must promote to an exclusive lock for vnode creation. This 1402 * can happen if lookup is passed LOCKSHARED. 1403 */ 1404 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1405 flags &= ~LK_TYPE_MASK; 1406 flags |= LK_EXCLUSIVE; 1407 } 1408 1409 /* 1410 * We do not lock vnode creation as it is believed to be too 1411 * expensive for such rare case as simultaneous creation of vnode 1412 * for same ino by different processes. We just allow them to race 1413 * and check later to decide who wins. Let the race begin! 1414 */ 1415 1416 ump = VFSTOUFS(mp); 1417 dev = ump->um_dev; 1418 fs = ump->um_fs; 1419 1420 /* 1421 * If this malloc() is performed after the getnewvnode() 1422 * it might block, leaving a vnode with a NULL v_data to be 1423 * found by ffs_sync() if a sync happens to fire right then, 1424 * which will cause a panic because ffs_sync() blindly 1425 * dereferences vp->v_data (as well it should). 1426 */ 1427 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1428 1429 /* Allocate a new vnode/inode. */ 1430 if (fs->fs_magic == FS_UFS1_MAGIC) 1431 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1432 else 1433 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1434 if (error) { 1435 *vpp = NULL; 1436 uma_zfree(uma_inode, ip); 1437 return (error); 1438 } 1439 /* 1440 * FFS supports recursive and shared locking. 1441 */ 1442 VN_LOCK_AREC(vp); 1443 VN_LOCK_ASHARE(vp); 1444 vp->v_data = ip; 1445 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1446 ip->i_vnode = vp; 1447 ip->i_ump = ump; 1448 ip->i_fs = fs; 1449 ip->i_dev = dev; 1450 ip->i_number = ino; 1451 #ifdef QUOTA 1452 { 1453 int i; 1454 for (i = 0; i < MAXQUOTAS; i++) 1455 ip->i_dquot[i] = NODQUOT; 1456 } 1457 #endif 1458 1459 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1460 if (ffs_flags & FFSV_FORCEINSMQ) 1461 vp->v_vflag |= VV_FORCEINSMQ; 1462 error = insmntque(vp, mp); 1463 if (error != 0) { 1464 uma_zfree(uma_inode, ip); 1465 *vpp = NULL; 1466 return (error); 1467 } 1468 vp->v_vflag &= ~VV_FORCEINSMQ; 1469 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1470 if (error || *vpp != NULL) 1471 return (error); 1472 1473 /* Read in the disk contents for the inode, copy into the inode. */ 1474 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1475 (int)fs->fs_bsize, NOCRED, &bp); 1476 if (error) { 1477 /* 1478 * The inode does not contain anything useful, so it would 1479 * be misleading to leave it on its hash chain. With mode 1480 * still zero, it will be unlinked and returned to the free 1481 * list by vput(). 1482 */ 1483 brelse(bp); 1484 vput(vp); 1485 *vpp = NULL; 1486 return (error); 1487 } 1488 if (ip->i_ump->um_fstype == UFS1) 1489 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1490 else 1491 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1492 ffs_load_inode(bp, ip, fs, ino); 1493 if (DOINGSOFTDEP(vp)) 1494 softdep_load_inodeblock(ip); 1495 else 1496 ip->i_effnlink = ip->i_nlink; 1497 bqrelse(bp); 1498 1499 /* 1500 * Initialize the vnode from the inode, check for aliases. 1501 * Note that the underlying vnode may have changed. 1502 */ 1503 if (ip->i_ump->um_fstype == UFS1) 1504 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1505 else 1506 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1507 if (error) { 1508 vput(vp); 1509 *vpp = NULL; 1510 return (error); 1511 } 1512 1513 /* 1514 * Finish inode initialization. 1515 */ 1516 1517 /* 1518 * Set up a generation number for this inode if it does not 1519 * already have one. This should only happen on old filesystems. 1520 */ 1521 if (ip->i_gen == 0) { 1522 ip->i_gen = arc4random() / 2 + 1; 1523 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1524 ip->i_flag |= IN_MODIFIED; 1525 DIP_SET(ip, i_gen, ip->i_gen); 1526 } 1527 } 1528 /* 1529 * Ensure that uid and gid are correct. This is a temporary 1530 * fix until fsck has been changed to do the update. 1531 */ 1532 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1533 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1534 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1535 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1536 } /* XXX */ 1537 1538 #ifdef MAC 1539 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1540 /* 1541 * If this vnode is already allocated, and we're running 1542 * multi-label, attempt to perform a label association 1543 * from the extended attributes on the inode. 1544 */ 1545 error = mac_vnode_associate_extattr(mp, vp); 1546 if (error) { 1547 /* ufs_inactive will release ip->i_devvp ref. */ 1548 vput(vp); 1549 *vpp = NULL; 1550 return (error); 1551 } 1552 } 1553 #endif 1554 1555 *vpp = vp; 1556 return (0); 1557 } 1558 1559 /* 1560 * File handle to vnode 1561 * 1562 * Have to be really careful about stale file handles: 1563 * - check that the inode number is valid 1564 * - call ffs_vget() to get the locked inode 1565 * - check for an unallocated inode (i_mode == 0) 1566 * - check that the given client host has export rights and return 1567 * those rights via. exflagsp and credanonp 1568 */ 1569 static int 1570 ffs_fhtovp(mp, fhp, vpp) 1571 struct mount *mp; 1572 struct fid *fhp; 1573 struct vnode **vpp; 1574 { 1575 struct ufid *ufhp; 1576 struct fs *fs; 1577 1578 ufhp = (struct ufid *)fhp; 1579 fs = VFSTOUFS(mp)->um_fs; 1580 if (ufhp->ufid_ino < ROOTINO || 1581 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1582 return (ESTALE); 1583 return (ufs_fhtovp(mp, ufhp, vpp)); 1584 } 1585 1586 /* 1587 * Initialize the filesystem. 1588 */ 1589 static int 1590 ffs_init(vfsp) 1591 struct vfsconf *vfsp; 1592 { 1593 1594 softdep_initialize(); 1595 return (ufs_init(vfsp)); 1596 } 1597 1598 /* 1599 * Undo the work of ffs_init(). 1600 */ 1601 static int 1602 ffs_uninit(vfsp) 1603 struct vfsconf *vfsp; 1604 { 1605 int ret; 1606 1607 ret = ufs_uninit(vfsp); 1608 softdep_uninitialize(); 1609 return (ret); 1610 } 1611 1612 /* 1613 * Write a superblock and associated information back to disk. 1614 */ 1615 int 1616 ffs_sbupdate(mp, waitfor, suspended) 1617 struct ufsmount *mp; 1618 int waitfor; 1619 int suspended; 1620 { 1621 struct fs *fs = mp->um_fs; 1622 struct buf *sbbp; 1623 struct buf *bp; 1624 int blks; 1625 void *space; 1626 int i, size, error, allerror = 0; 1627 1628 if (fs->fs_ronly == 1 && 1629 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1630 (MNT_RDONLY | MNT_UPDATE)) 1631 panic("ffs_sbupdate: write read-only filesystem"); 1632 /* 1633 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1634 */ 1635 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1636 0, 0, 0); 1637 /* 1638 * First write back the summary information. 1639 */ 1640 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1641 space = fs->fs_csp; 1642 for (i = 0; i < blks; i += fs->fs_frag) { 1643 size = fs->fs_bsize; 1644 if (i + fs->fs_frag > blks) 1645 size = (blks - i) * fs->fs_fsize; 1646 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1647 size, 0, 0, 0); 1648 bcopy(space, bp->b_data, (u_int)size); 1649 space = (char *)space + size; 1650 if (suspended) 1651 bp->b_flags |= B_VALIDSUSPWRT; 1652 if (waitfor != MNT_WAIT) 1653 bawrite(bp); 1654 else if ((error = bwrite(bp)) != 0) 1655 allerror = error; 1656 } 1657 /* 1658 * Now write back the superblock itself. If any errors occurred 1659 * up to this point, then fail so that the superblock avoids 1660 * being written out as clean. 1661 */ 1662 if (allerror) { 1663 brelse(sbbp); 1664 return (allerror); 1665 } 1666 bp = sbbp; 1667 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1668 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1669 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1670 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1671 fs->fs_sblockloc = SBLOCK_UFS1; 1672 } 1673 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1674 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1675 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1676 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1677 fs->fs_sblockloc = SBLOCK_UFS2; 1678 } 1679 fs->fs_fmod = 0; 1680 fs->fs_time = time_second; 1681 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1682 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1683 if (suspended) 1684 bp->b_flags |= B_VALIDSUSPWRT; 1685 if (waitfor != MNT_WAIT) 1686 bawrite(bp); 1687 else if ((error = bwrite(bp)) != 0) 1688 allerror = error; 1689 return (allerror); 1690 } 1691 1692 static int 1693 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1694 int attrnamespace, const char *attrname, struct thread *td) 1695 { 1696 1697 #ifdef UFS_EXTATTR 1698 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1699 attrname, td)); 1700 #else 1701 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1702 attrname, td)); 1703 #endif 1704 } 1705 1706 static void 1707 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1708 { 1709 1710 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1711 uma_zfree(uma_ufs1, ip->i_din1); 1712 else if (ip->i_din2 != NULL) 1713 uma_zfree(uma_ufs2, ip->i_din2); 1714 uma_zfree(uma_inode, ip); 1715 } 1716 1717 static int dobkgrdwrite = 1; 1718 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1719 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1720 1721 /* 1722 * Complete a background write started from bwrite. 1723 */ 1724 static void 1725 ffs_backgroundwritedone(struct buf *bp) 1726 { 1727 struct bufobj *bufobj; 1728 struct buf *origbp; 1729 1730 /* 1731 * Find the original buffer that we are writing. 1732 */ 1733 bufobj = bp->b_bufobj; 1734 BO_LOCK(bufobj); 1735 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1736 panic("backgroundwritedone: lost buffer"); 1737 /* Grab an extra reference to be dropped by the bufdone() below. */ 1738 bufobj_wrefl(bufobj); 1739 BO_UNLOCK(bufobj); 1740 /* 1741 * Process dependencies then return any unfinished ones. 1742 */ 1743 if (!LIST_EMPTY(&bp->b_dep)) 1744 buf_complete(bp); 1745 #ifdef SOFTUPDATES 1746 if (!LIST_EMPTY(&bp->b_dep)) 1747 softdep_move_dependencies(bp, origbp); 1748 #endif 1749 /* 1750 * This buffer is marked B_NOCACHE so when it is released 1751 * by biodone it will be tossed. 1752 */ 1753 bp->b_flags |= B_NOCACHE; 1754 bp->b_flags &= ~B_CACHE; 1755 bufdone(bp); 1756 BO_LOCK(bufobj); 1757 /* 1758 * Clear the BV_BKGRDINPROG flag in the original buffer 1759 * and awaken it if it is waiting for the write to complete. 1760 * If BV_BKGRDINPROG is not set in the original buffer it must 1761 * have been released and re-instantiated - which is not legal. 1762 */ 1763 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1764 ("backgroundwritedone: lost buffer2")); 1765 origbp->b_vflags &= ~BV_BKGRDINPROG; 1766 if (origbp->b_vflags & BV_BKGRDWAIT) { 1767 origbp->b_vflags &= ~BV_BKGRDWAIT; 1768 wakeup(&origbp->b_xflags); 1769 } 1770 BO_UNLOCK(bufobj); 1771 } 1772 1773 1774 /* 1775 * Write, release buffer on completion. (Done by iodone 1776 * if async). Do not bother writing anything if the buffer 1777 * is invalid. 1778 * 1779 * Note that we set B_CACHE here, indicating that buffer is 1780 * fully valid and thus cacheable. This is true even of NFS 1781 * now so we set it generally. This could be set either here 1782 * or in biodone() since the I/O is synchronous. We put it 1783 * here. 1784 */ 1785 static int 1786 ffs_bufwrite(struct buf *bp) 1787 { 1788 int oldflags, s; 1789 struct buf *newbp; 1790 1791 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1792 if (bp->b_flags & B_INVAL) { 1793 brelse(bp); 1794 return (0); 1795 } 1796 1797 oldflags = bp->b_flags; 1798 1799 if (!BUF_ISLOCKED(bp)) 1800 panic("bufwrite: buffer is not busy???"); 1801 s = splbio(); 1802 /* 1803 * If a background write is already in progress, delay 1804 * writing this block if it is asynchronous. Otherwise 1805 * wait for the background write to complete. 1806 */ 1807 BO_LOCK(bp->b_bufobj); 1808 if (bp->b_vflags & BV_BKGRDINPROG) { 1809 if (bp->b_flags & B_ASYNC) { 1810 BO_UNLOCK(bp->b_bufobj); 1811 splx(s); 1812 bdwrite(bp); 1813 return (0); 1814 } 1815 bp->b_vflags |= BV_BKGRDWAIT; 1816 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1817 if (bp->b_vflags & BV_BKGRDINPROG) 1818 panic("bufwrite: still writing"); 1819 } 1820 BO_UNLOCK(bp->b_bufobj); 1821 1822 /* Mark the buffer clean */ 1823 bundirty(bp); 1824 1825 /* 1826 * If this buffer is marked for background writing and we 1827 * do not have to wait for it, make a copy and write the 1828 * copy so as to leave this buffer ready for further use. 1829 * 1830 * This optimization eats a lot of memory. If we have a page 1831 * or buffer shortfall we can't do it. 1832 */ 1833 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1834 (bp->b_flags & B_ASYNC) && 1835 !vm_page_count_severe() && 1836 !buf_dirty_count_severe()) { 1837 KASSERT(bp->b_iodone == NULL, 1838 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1839 1840 /* get a new block */ 1841 newbp = geteblk(bp->b_bufsize); 1842 1843 /* 1844 * set it to be identical to the old block. We have to 1845 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1846 * to avoid confusing the splay tree and gbincore(). 1847 */ 1848 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1849 newbp->b_lblkno = bp->b_lblkno; 1850 newbp->b_xflags |= BX_BKGRDMARKER; 1851 BO_LOCK(bp->b_bufobj); 1852 bp->b_vflags |= BV_BKGRDINPROG; 1853 bgetvp(bp->b_vp, newbp); 1854 BO_UNLOCK(bp->b_bufobj); 1855 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1856 newbp->b_blkno = bp->b_blkno; 1857 newbp->b_offset = bp->b_offset; 1858 newbp->b_iodone = ffs_backgroundwritedone; 1859 newbp->b_flags |= B_ASYNC; 1860 newbp->b_flags &= ~B_INVAL; 1861 1862 #ifdef SOFTUPDATES 1863 /* move over the dependencies */ 1864 if (!LIST_EMPTY(&bp->b_dep)) 1865 softdep_move_dependencies(bp, newbp); 1866 #endif 1867 1868 /* 1869 * Initiate write on the copy, release the original to 1870 * the B_LOCKED queue so that it cannot go away until 1871 * the background write completes. If not locked it could go 1872 * away and then be reconstituted while it was being written. 1873 * If the reconstituted buffer were written, we could end up 1874 * with two background copies being written at the same time. 1875 */ 1876 bqrelse(bp); 1877 bp = newbp; 1878 } 1879 1880 /* Let the normal bufwrite do the rest for us */ 1881 return (bufwrite(bp)); 1882 } 1883 1884 1885 static void 1886 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1887 { 1888 struct vnode *vp; 1889 int error; 1890 struct buf *tbp; 1891 1892 vp = bo->__bo_vnode; 1893 if (bp->b_iocmd == BIO_WRITE) { 1894 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 1895 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 1896 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 1897 panic("ffs_geom_strategy: bad I/O"); 1898 bp->b_flags &= ~B_VALIDSUSPWRT; 1899 if ((vp->v_vflag & VV_COPYONWRITE) && 1900 vp->v_rdev->si_snapdata != NULL) { 1901 if ((bp->b_flags & B_CLUSTER) != 0) { 1902 runningbufwakeup(bp); 1903 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 1904 b_cluster.cluster_entry) { 1905 error = ffs_copyonwrite(vp, tbp); 1906 if (error != 0 && 1907 error != EOPNOTSUPP) { 1908 bp->b_error = error; 1909 bp->b_ioflags |= BIO_ERROR; 1910 bufdone(bp); 1911 return; 1912 } 1913 } 1914 bp->b_runningbufspace = bp->b_bufsize; 1915 atomic_add_int(&runningbufspace, 1916 bp->b_runningbufspace); 1917 } else { 1918 error = ffs_copyonwrite(vp, bp); 1919 if (error != 0 && error != EOPNOTSUPP) { 1920 bp->b_error = error; 1921 bp->b_ioflags |= BIO_ERROR; 1922 bufdone(bp); 1923 return; 1924 } 1925 } 1926 } 1927 #ifdef SOFTUPDATES 1928 if ((bp->b_flags & B_CLUSTER) != 0) { 1929 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 1930 b_cluster.cluster_entry) { 1931 if (!LIST_EMPTY(&tbp->b_dep)) 1932 buf_start(tbp); 1933 } 1934 } else { 1935 if (!LIST_EMPTY(&bp->b_dep)) 1936 buf_start(bp); 1937 } 1938 1939 #endif 1940 } 1941 g_vfs_strategy(bo, bp); 1942 } 1943 1944 #ifdef DDB 1945 1946 static void 1947 db_print_ffs(struct ufsmount *ump) 1948 { 1949 db_printf("mp %p %s devvp %p fs %p su_wl %d su_wl_in %d su_deps %d " 1950 "su_req %d\n", 1951 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 1952 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 1953 ump->softdep_on_worklist_inprogress, ump->softdep_deps, 1954 ump->softdep_req); 1955 } 1956 1957 DB_SHOW_COMMAND(ffs, db_show_ffs) 1958 { 1959 struct mount *mp; 1960 struct ufsmount *ump; 1961 1962 if (have_addr) { 1963 ump = VFSTOUFS((struct mount *)addr); 1964 db_print_ffs(ump); 1965 return; 1966 } 1967 1968 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 1969 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 1970 db_print_ffs(VFSTOUFS(mp)); 1971 } 1972 } 1973 1974 #endif /* DDB */ 1975