1 /*- 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_quota.h" 36 #include "opt_ufs.h" 37 #include "opt_ffs.h" 38 #include "opt_ddb.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/conf.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/mutex.h> 54 55 #include <security/mac/mac_framework.h> 56 57 #include <ufs/ufs/extattr.h> 58 #include <ufs/ufs/gjournal.h> 59 #include <ufs/ufs/quota.h> 60 #include <ufs/ufs/ufsmount.h> 61 #include <ufs/ufs/inode.h> 62 #include <ufs/ufs/ufs_extern.h> 63 64 #include <ufs/ffs/fs.h> 65 #include <ufs/ffs/ffs_extern.h> 66 67 #include <vm/vm.h> 68 #include <vm/uma.h> 69 #include <vm/vm_page.h> 70 71 #include <geom/geom.h> 72 #include <geom/geom_vfs.h> 73 74 #include <ddb/ddb.h> 75 76 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 77 78 static int ffs_reload(struct mount *, struct thread *); 79 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 80 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 81 ufs2_daddr_t); 82 static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 83 static vfs_init_t ffs_init; 84 static vfs_uninit_t ffs_uninit; 85 static vfs_extattrctl_t ffs_extattrctl; 86 static vfs_cmount_t ffs_cmount; 87 static vfs_unmount_t ffs_unmount; 88 static vfs_mount_t ffs_mount; 89 static vfs_statfs_t ffs_statfs; 90 static vfs_fhtovp_t ffs_fhtovp; 91 static vfs_sync_t ffs_sync; 92 93 static struct vfsops ufs_vfsops = { 94 .vfs_extattrctl = ffs_extattrctl, 95 .vfs_fhtovp = ffs_fhtovp, 96 .vfs_init = ffs_init, 97 .vfs_mount = ffs_mount, 98 .vfs_cmount = ffs_cmount, 99 .vfs_quotactl = ufs_quotactl, 100 .vfs_root = ufs_root, 101 .vfs_statfs = ffs_statfs, 102 .vfs_sync = ffs_sync, 103 .vfs_uninit = ffs_uninit, 104 .vfs_unmount = ffs_unmount, 105 .vfs_vget = ffs_vget, 106 .vfs_susp_clean = process_deferred_inactive, 107 }; 108 109 VFS_SET(ufs_vfsops, ufs, 0); 110 MODULE_VERSION(ufs, 1); 111 112 static b_strategy_t ffs_geom_strategy; 113 static b_write_t ffs_bufwrite; 114 115 static struct buf_ops ffs_ops = { 116 .bop_name = "FFS", 117 .bop_write = ffs_bufwrite, 118 .bop_strategy = ffs_geom_strategy, 119 .bop_sync = bufsync, 120 #ifdef NO_FFS_SNAPSHOT 121 .bop_bdflush = bufbdflush, 122 #else 123 .bop_bdflush = ffs_bdflush, 124 #endif 125 }; 126 127 /* 128 * Note that userquota and groupquota options are not currently used 129 * by UFS/FFS code and generally mount(8) does not pass those options 130 * from userland, but they can be passed by loader(8) via 131 * vfs.root.mountfrom.options. 132 */ 133 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", 134 "noclusterw", "noexec", "export", "force", "from", "groupquota", 135 "multilabel", "nfsv4acls", "snapshot", "nosuid", "suiddir", "nosymfollow", 136 "sync", "union", "userquota", NULL }; 137 138 static int 139 ffs_mount(struct mount *mp) 140 { 141 struct vnode *devvp; 142 struct thread *td; 143 struct ufsmount *ump = 0; 144 struct fs *fs; 145 int error, flags; 146 u_int mntorflags; 147 accmode_t accmode; 148 struct nameidata ndp; 149 char *fspec; 150 151 td = curthread; 152 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 153 return (EINVAL); 154 if (uma_inode == NULL) { 155 uma_inode = uma_zcreate("FFS inode", 156 sizeof(struct inode), NULL, NULL, NULL, NULL, 157 UMA_ALIGN_PTR, 0); 158 uma_ufs1 = uma_zcreate("FFS1 dinode", 159 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 160 UMA_ALIGN_PTR, 0); 161 uma_ufs2 = uma_zcreate("FFS2 dinode", 162 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 163 UMA_ALIGN_PTR, 0); 164 } 165 166 vfs_deleteopt(mp->mnt_optnew, "groupquota"); 167 vfs_deleteopt(mp->mnt_optnew, "userquota"); 168 169 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 170 if (error) 171 return (error); 172 173 mntorflags = 0; 174 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) 175 mntorflags |= MNT_ACLS; 176 177 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { 178 mntorflags |= MNT_SNAPSHOT; 179 /* 180 * Once we have set the MNT_SNAPSHOT flag, do not 181 * persist "snapshot" in the options list. 182 */ 183 vfs_deleteopt(mp->mnt_optnew, "snapshot"); 184 vfs_deleteopt(mp->mnt_opt, "snapshot"); 185 } 186 187 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { 188 if (mntorflags & MNT_ACLS) { 189 printf("WARNING: \"acls\" and \"nfsv4acls\" " 190 "options are mutually exclusive\n"); 191 return (EINVAL); 192 } 193 mntorflags |= MNT_NFS4ACLS; 194 } 195 196 MNT_ILOCK(mp); 197 mp->mnt_flag |= mntorflags; 198 MNT_IUNLOCK(mp); 199 /* 200 * If updating, check whether changing from read-only to 201 * read/write; if there is no device name, that's all we do. 202 */ 203 if (mp->mnt_flag & MNT_UPDATE) { 204 ump = VFSTOUFS(mp); 205 fs = ump->um_fs; 206 devvp = ump->um_devvp; 207 if (fs->fs_ronly == 0 && 208 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 209 /* 210 * Flush any dirty data and suspend filesystem. 211 */ 212 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 213 return (error); 214 for (;;) { 215 vn_finished_write(mp); 216 if ((error = vfs_write_suspend(mp)) != 0) 217 return (error); 218 MNT_ILOCK(mp); 219 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 220 /* 221 * Allow the secondary writes 222 * to proceed. 223 */ 224 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 225 MNTK_SUSPEND2); 226 wakeup(&mp->mnt_flag); 227 MNT_IUNLOCK(mp); 228 /* 229 * Allow the curthread to 230 * ignore the suspension to 231 * synchronize on-disk state. 232 */ 233 td->td_pflags |= TDP_IGNSUSP; 234 break; 235 } 236 MNT_IUNLOCK(mp); 237 vn_start_write(NULL, &mp, V_WAIT); 238 } 239 /* 240 * Check for and optionally get rid of files open 241 * for writing. 242 */ 243 flags = WRITECLOSE; 244 if (mp->mnt_flag & MNT_FORCE) 245 flags |= FORCECLOSE; 246 if (mp->mnt_flag & MNT_SOFTDEP) { 247 error = softdep_flushfiles(mp, flags, td); 248 } else { 249 error = ffs_flushfiles(mp, flags, td); 250 } 251 if (error) { 252 vfs_write_resume(mp); 253 return (error); 254 } 255 if (fs->fs_pendingblocks != 0 || 256 fs->fs_pendinginodes != 0) { 257 printf("%s: %s: blocks %jd files %d\n", 258 fs->fs_fsmnt, "update error", 259 (intmax_t)fs->fs_pendingblocks, 260 fs->fs_pendinginodes); 261 fs->fs_pendingblocks = 0; 262 fs->fs_pendinginodes = 0; 263 } 264 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 265 fs->fs_clean = 1; 266 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 267 fs->fs_ronly = 0; 268 fs->fs_clean = 0; 269 vfs_write_resume(mp); 270 return (error); 271 } 272 DROP_GIANT(); 273 g_topology_lock(); 274 g_access(ump->um_cp, 0, -1, 0); 275 g_topology_unlock(); 276 PICKUP_GIANT(); 277 fs->fs_ronly = 1; 278 MNT_ILOCK(mp); 279 mp->mnt_flag |= MNT_RDONLY; 280 MNT_IUNLOCK(mp); 281 /* 282 * Allow the writers to note that filesystem 283 * is ro now. 284 */ 285 vfs_write_resume(mp); 286 } 287 if ((mp->mnt_flag & MNT_RELOAD) && 288 (error = ffs_reload(mp, td)) != 0) 289 return (error); 290 if (fs->fs_ronly && 291 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 292 /* 293 * If upgrade to read-write by non-root, then verify 294 * that user has necessary permissions on the device. 295 */ 296 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 297 error = VOP_ACCESS(devvp, VREAD | VWRITE, 298 td->td_ucred, td); 299 if (error) 300 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 301 if (error) { 302 VOP_UNLOCK(devvp, 0); 303 return (error); 304 } 305 VOP_UNLOCK(devvp, 0); 306 fs->fs_flags &= ~FS_UNCLEAN; 307 if (fs->fs_clean == 0) { 308 fs->fs_flags |= FS_UNCLEAN; 309 if ((mp->mnt_flag & MNT_FORCE) || 310 ((fs->fs_flags & 311 (FS_SUJ | FS_NEEDSFSCK)) == 0 && 312 (fs->fs_flags & FS_DOSOFTDEP))) { 313 printf("WARNING: %s was not %s\n", 314 fs->fs_fsmnt, "properly dismounted"); 315 } else { 316 printf( 317 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 318 fs->fs_fsmnt); 319 if (fs->fs_flags & FS_SUJ) 320 printf( 321 "WARNING: Forced mount will invalidate journal contents\n"); 322 return (EPERM); 323 } 324 } 325 DROP_GIANT(); 326 g_topology_lock(); 327 /* 328 * If we're the root device, we may not have an E count 329 * yet, get it now. 330 */ 331 if (ump->um_cp->ace == 0) 332 error = g_access(ump->um_cp, 0, 1, 1); 333 else 334 error = g_access(ump->um_cp, 0, 1, 0); 335 g_topology_unlock(); 336 PICKUP_GIANT(); 337 if (error) 338 return (error); 339 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 340 return (error); 341 fs->fs_ronly = 0; 342 MNT_ILOCK(mp); 343 mp->mnt_flag &= ~MNT_RDONLY; 344 MNT_IUNLOCK(mp); 345 fs->fs_mtime = time_second; 346 /* check to see if we need to start softdep */ 347 if ((fs->fs_flags & FS_DOSOFTDEP) && 348 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 349 vn_finished_write(mp); 350 return (error); 351 } 352 fs->fs_clean = 0; 353 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { 354 vn_finished_write(mp); 355 return (error); 356 } 357 if (fs->fs_snapinum[0] != 0) 358 ffs_snapshot_mount(mp); 359 vn_finished_write(mp); 360 } 361 /* 362 * Soft updates is incompatible with "async", 363 * so if we are doing softupdates stop the user 364 * from setting the async flag in an update. 365 * Softdep_mount() clears it in an initial mount 366 * or ro->rw remount. 367 */ 368 if (mp->mnt_flag & MNT_SOFTDEP) { 369 /* XXX: Reset too late ? */ 370 MNT_ILOCK(mp); 371 mp->mnt_flag &= ~MNT_ASYNC; 372 MNT_IUNLOCK(mp); 373 } 374 /* 375 * Keep MNT_ACLS flag if it is stored in superblock. 376 */ 377 if ((fs->fs_flags & FS_ACLS) != 0) { 378 /* XXX: Set too late ? */ 379 MNT_ILOCK(mp); 380 mp->mnt_flag |= MNT_ACLS; 381 MNT_IUNLOCK(mp); 382 } 383 384 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 385 /* XXX: Set too late ? */ 386 MNT_ILOCK(mp); 387 mp->mnt_flag |= MNT_NFS4ACLS; 388 MNT_IUNLOCK(mp); 389 } 390 391 /* 392 * If this is a snapshot request, take the snapshot. 393 */ 394 if (mp->mnt_flag & MNT_SNAPSHOT) 395 return (ffs_snapshot(mp, fspec)); 396 } 397 398 /* 399 * Not an update, or updating the name: look up the name 400 * and verify that it refers to a sensible disk device. 401 */ 402 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 403 if ((error = namei(&ndp)) != 0) 404 return (error); 405 NDFREE(&ndp, NDF_ONLY_PNBUF); 406 devvp = ndp.ni_vp; 407 if (!vn_isdisk(devvp, &error)) { 408 vput(devvp); 409 return (error); 410 } 411 412 /* 413 * If mount by non-root, then verify that user has necessary 414 * permissions on the device. 415 */ 416 accmode = VREAD; 417 if ((mp->mnt_flag & MNT_RDONLY) == 0) 418 accmode |= VWRITE; 419 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 420 if (error) 421 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 422 if (error) { 423 vput(devvp); 424 return (error); 425 } 426 427 if (mp->mnt_flag & MNT_UPDATE) { 428 /* 429 * Update only 430 * 431 * If it's not the same vnode, or at least the same device 432 * then it's not correct. 433 */ 434 435 if (devvp->v_rdev != ump->um_devvp->v_rdev) 436 error = EINVAL; /* needs translation */ 437 vput(devvp); 438 if (error) 439 return (error); 440 } else { 441 /* 442 * New mount 443 * 444 * We need the name for the mount point (also used for 445 * "last mounted on") copied in. If an error occurs, 446 * the mount point is discarded by the upper level code. 447 * Note that vfs_mount() populates f_mntonname for us. 448 */ 449 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 450 vrele(devvp); 451 return (error); 452 } 453 } 454 vfs_mountedfrom(mp, fspec); 455 return (0); 456 } 457 458 /* 459 * Compatibility with old mount system call. 460 */ 461 462 static int 463 ffs_cmount(struct mntarg *ma, void *data, int flags) 464 { 465 struct ufs_args args; 466 struct export_args exp; 467 int error; 468 469 if (data == NULL) 470 return (EINVAL); 471 error = copyin(data, &args, sizeof args); 472 if (error) 473 return (error); 474 vfs_oexport_conv(&args.export, &exp); 475 476 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 477 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 478 error = kernel_mount(ma, flags); 479 480 return (error); 481 } 482 483 /* 484 * Reload all incore data for a filesystem (used after running fsck on 485 * the root filesystem and finding things to fix). The filesystem must 486 * be mounted read-only. 487 * 488 * Things to do to update the mount: 489 * 1) invalidate all cached meta-data. 490 * 2) re-read superblock from disk. 491 * 3) re-read summary information from disk. 492 * 4) invalidate all inactive vnodes. 493 * 5) invalidate all cached file data. 494 * 6) re-read inode data for all active vnodes. 495 */ 496 static int 497 ffs_reload(struct mount *mp, struct thread *td) 498 { 499 struct vnode *vp, *mvp, *devvp; 500 struct inode *ip; 501 void *space; 502 struct buf *bp; 503 struct fs *fs, *newfs; 504 struct ufsmount *ump; 505 ufs2_daddr_t sblockloc; 506 int i, blks, size, error; 507 int32_t *lp; 508 509 if ((mp->mnt_flag & MNT_RDONLY) == 0) 510 return (EINVAL); 511 ump = VFSTOUFS(mp); 512 /* 513 * Step 1: invalidate all cached meta-data. 514 */ 515 devvp = VFSTOUFS(mp)->um_devvp; 516 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 517 if (vinvalbuf(devvp, 0, 0, 0) != 0) 518 panic("ffs_reload: dirty1"); 519 VOP_UNLOCK(devvp, 0); 520 521 /* 522 * Step 2: re-read superblock from disk. 523 */ 524 fs = VFSTOUFS(mp)->um_fs; 525 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 526 NOCRED, &bp)) != 0) 527 return (error); 528 newfs = (struct fs *)bp->b_data; 529 if ((newfs->fs_magic != FS_UFS1_MAGIC && 530 newfs->fs_magic != FS_UFS2_MAGIC) || 531 newfs->fs_bsize > MAXBSIZE || 532 newfs->fs_bsize < sizeof(struct fs)) { 533 brelse(bp); 534 return (EIO); /* XXX needs translation */ 535 } 536 /* 537 * Copy pointer fields back into superblock before copying in XXX 538 * new superblock. These should really be in the ufsmount. XXX 539 * Note that important parameters (eg fs_ncg) are unchanged. 540 */ 541 newfs->fs_csp = fs->fs_csp; 542 newfs->fs_maxcluster = fs->fs_maxcluster; 543 newfs->fs_contigdirs = fs->fs_contigdirs; 544 newfs->fs_active = fs->fs_active; 545 /* The file system is still read-only. */ 546 newfs->fs_ronly = 1; 547 sblockloc = fs->fs_sblockloc; 548 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 549 brelse(bp); 550 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 551 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 552 UFS_LOCK(ump); 553 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 554 printf("%s: reload pending error: blocks %jd files %d\n", 555 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 556 fs->fs_pendinginodes); 557 fs->fs_pendingblocks = 0; 558 fs->fs_pendinginodes = 0; 559 } 560 UFS_UNLOCK(ump); 561 562 /* 563 * Step 3: re-read summary information from disk. 564 */ 565 blks = howmany(fs->fs_cssize, fs->fs_fsize); 566 space = fs->fs_csp; 567 for (i = 0; i < blks; i += fs->fs_frag) { 568 size = fs->fs_bsize; 569 if (i + fs->fs_frag > blks) 570 size = (blks - i) * fs->fs_fsize; 571 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 572 NOCRED, &bp); 573 if (error) 574 return (error); 575 bcopy(bp->b_data, space, (u_int)size); 576 space = (char *)space + size; 577 brelse(bp); 578 } 579 /* 580 * We no longer know anything about clusters per cylinder group. 581 */ 582 if (fs->fs_contigsumsize > 0) { 583 lp = fs->fs_maxcluster; 584 for (i = 0; i < fs->fs_ncg; i++) 585 *lp++ = fs->fs_contigsumsize; 586 } 587 588 loop: 589 MNT_ILOCK(mp); 590 MNT_VNODE_FOREACH(vp, mp, mvp) { 591 VI_LOCK(vp); 592 if (vp->v_iflag & VI_DOOMED) { 593 VI_UNLOCK(vp); 594 continue; 595 } 596 MNT_IUNLOCK(mp); 597 /* 598 * Step 4: invalidate all cached file data. 599 */ 600 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 601 MNT_VNODE_FOREACH_ABORT(mp, mvp); 602 goto loop; 603 } 604 if (vinvalbuf(vp, 0, 0, 0)) 605 panic("ffs_reload: dirty2"); 606 /* 607 * Step 5: re-read inode data for all active vnodes. 608 */ 609 ip = VTOI(vp); 610 error = 611 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 612 (int)fs->fs_bsize, NOCRED, &bp); 613 if (error) { 614 VOP_UNLOCK(vp, 0); 615 vrele(vp); 616 MNT_VNODE_FOREACH_ABORT(mp, mvp); 617 return (error); 618 } 619 ffs_load_inode(bp, ip, fs, ip->i_number); 620 ip->i_effnlink = ip->i_nlink; 621 brelse(bp); 622 VOP_UNLOCK(vp, 0); 623 vrele(vp); 624 MNT_ILOCK(mp); 625 } 626 MNT_IUNLOCK(mp); 627 return (0); 628 } 629 630 /* 631 * Possible superblock locations ordered from most to least likely. 632 */ 633 static int sblock_try[] = SBLOCKSEARCH; 634 635 /* 636 * Common code for mount and mountroot 637 */ 638 static int 639 ffs_mountfs(devvp, mp, td) 640 struct vnode *devvp; 641 struct mount *mp; 642 struct thread *td; 643 { 644 struct ufsmount *ump; 645 struct buf *bp; 646 struct fs *fs; 647 struct cdev *dev; 648 void *space; 649 ufs2_daddr_t sblockloc; 650 int error, i, blks, size, ronly; 651 int32_t *lp; 652 struct ucred *cred; 653 struct g_consumer *cp; 654 struct mount *nmp; 655 656 bp = NULL; 657 ump = NULL; 658 cred = td ? td->td_ucred : NOCRED; 659 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 660 661 dev = devvp->v_rdev; 662 dev_ref(dev); 663 DROP_GIANT(); 664 g_topology_lock(); 665 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 666 667 /* 668 * If we are a root mount, drop the E flag so fsck can do its magic. 669 * We will pick it up again when we remount R/W. 670 */ 671 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 672 error = g_access(cp, 0, 0, -1); 673 g_topology_unlock(); 674 PICKUP_GIANT(); 675 VOP_UNLOCK(devvp, 0); 676 if (error) 677 goto out; 678 if (devvp->v_rdev->si_iosize_max != 0) 679 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 680 if (mp->mnt_iosize_max > MAXPHYS) 681 mp->mnt_iosize_max = MAXPHYS; 682 683 devvp->v_bufobj.bo_ops = &ffs_ops; 684 685 fs = NULL; 686 sblockloc = 0; 687 /* 688 * Try reading the superblock in each of its possible locations. 689 */ 690 for (i = 0; sblock_try[i] != -1; i++) { 691 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { 692 error = EINVAL; 693 vfs_mount_error(mp, 694 "Invalid sectorsize %d for superblock size %d", 695 cp->provider->sectorsize, SBLOCKSIZE); 696 goto out; 697 } 698 if ((error = bread(devvp, btodb(sblock_try[i]), SBLOCKSIZE, 699 cred, &bp)) != 0) 700 goto out; 701 fs = (struct fs *)bp->b_data; 702 sblockloc = sblock_try[i]; 703 if ((fs->fs_magic == FS_UFS1_MAGIC || 704 (fs->fs_magic == FS_UFS2_MAGIC && 705 (fs->fs_sblockloc == sblockloc || 706 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 707 fs->fs_bsize <= MAXBSIZE && 708 fs->fs_bsize >= sizeof(struct fs)) 709 break; 710 brelse(bp); 711 bp = NULL; 712 } 713 if (sblock_try[i] == -1) { 714 error = EINVAL; /* XXX needs translation */ 715 goto out; 716 } 717 fs->fs_fmod = 0; 718 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 719 fs->fs_flags &= ~FS_UNCLEAN; 720 if (fs->fs_clean == 0) { 721 fs->fs_flags |= FS_UNCLEAN; 722 if (ronly || (mp->mnt_flag & MNT_FORCE) || 723 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && 724 (fs->fs_flags & FS_DOSOFTDEP))) { 725 printf("WARNING: %s was not properly dismounted\n", 726 fs->fs_fsmnt); 727 } else { 728 printf( 729 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 730 fs->fs_fsmnt); 731 if (fs->fs_flags & FS_SUJ) 732 printf( 733 "WARNING: Forced mount will invalidate journal contents\n"); 734 error = EPERM; 735 goto out; 736 } 737 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 738 (mp->mnt_flag & MNT_FORCE)) { 739 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 740 (intmax_t)fs->fs_pendingblocks, 741 fs->fs_pendinginodes); 742 fs->fs_pendingblocks = 0; 743 fs->fs_pendinginodes = 0; 744 } 745 } 746 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 747 printf("%s: mount pending error: blocks %jd files %d\n", 748 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 749 fs->fs_pendinginodes); 750 fs->fs_pendingblocks = 0; 751 fs->fs_pendinginodes = 0; 752 } 753 if ((fs->fs_flags & FS_GJOURNAL) != 0) { 754 #ifdef UFS_GJOURNAL 755 /* 756 * Get journal provider name. 757 */ 758 size = 1024; 759 mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); 760 if (g_io_getattr("GJOURNAL::provider", cp, &size, 761 mp->mnt_gjprovider) == 0) { 762 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, 763 M_UFSMNT, M_WAITOK); 764 MNT_ILOCK(mp); 765 mp->mnt_flag |= MNT_GJOURNAL; 766 MNT_IUNLOCK(mp); 767 } else { 768 printf( 769 "WARNING: %s: GJOURNAL flag on fs but no gjournal provider below\n", 770 mp->mnt_stat.f_mntonname); 771 free(mp->mnt_gjprovider, M_UFSMNT); 772 mp->mnt_gjprovider = NULL; 773 } 774 #else 775 printf( 776 "WARNING: %s: GJOURNAL flag on fs but no UFS_GJOURNAL support\n", 777 mp->mnt_stat.f_mntonname); 778 #endif 779 } else { 780 mp->mnt_gjprovider = NULL; 781 } 782 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 783 ump->um_cp = cp; 784 ump->um_bo = &devvp->v_bufobj; 785 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 786 if (fs->fs_magic == FS_UFS1_MAGIC) { 787 ump->um_fstype = UFS1; 788 ump->um_balloc = ffs_balloc_ufs1; 789 } else { 790 ump->um_fstype = UFS2; 791 ump->um_balloc = ffs_balloc_ufs2; 792 } 793 ump->um_blkatoff = ffs_blkatoff; 794 ump->um_truncate = ffs_truncate; 795 ump->um_update = ffs_update; 796 ump->um_valloc = ffs_valloc; 797 ump->um_vfree = ffs_vfree; 798 ump->um_ifree = ffs_ifree; 799 ump->um_rdonly = ffs_rdonly; 800 ump->um_snapgone = ffs_snapgone; 801 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 802 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 803 if (fs->fs_sbsize < SBLOCKSIZE) 804 bp->b_flags |= B_INVAL | B_NOCACHE; 805 brelse(bp); 806 bp = NULL; 807 fs = ump->um_fs; 808 ffs_oldfscompat_read(fs, ump, sblockloc); 809 fs->fs_ronly = ronly; 810 size = fs->fs_cssize; 811 blks = howmany(size, fs->fs_fsize); 812 if (fs->fs_contigsumsize > 0) 813 size += fs->fs_ncg * sizeof(int32_t); 814 size += fs->fs_ncg * sizeof(u_int8_t); 815 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 816 fs->fs_csp = space; 817 for (i = 0; i < blks; i += fs->fs_frag) { 818 size = fs->fs_bsize; 819 if (i + fs->fs_frag > blks) 820 size = (blks - i) * fs->fs_fsize; 821 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 822 cred, &bp)) != 0) { 823 free(fs->fs_csp, M_UFSMNT); 824 goto out; 825 } 826 bcopy(bp->b_data, space, (u_int)size); 827 space = (char *)space + size; 828 brelse(bp); 829 bp = NULL; 830 } 831 if (fs->fs_contigsumsize > 0) { 832 fs->fs_maxcluster = lp = space; 833 for (i = 0; i < fs->fs_ncg; i++) 834 *lp++ = fs->fs_contigsumsize; 835 space = lp; 836 } 837 size = fs->fs_ncg * sizeof(u_int8_t); 838 fs->fs_contigdirs = (u_int8_t *)space; 839 bzero(fs->fs_contigdirs, size); 840 fs->fs_active = NULL; 841 mp->mnt_data = ump; 842 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 843 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 844 nmp = NULL; 845 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 846 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { 847 if (nmp) 848 vfs_rel(nmp); 849 vfs_getnewfsid(mp); 850 } 851 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 852 MNT_ILOCK(mp); 853 mp->mnt_flag |= MNT_LOCAL; 854 MNT_IUNLOCK(mp); 855 if ((fs->fs_flags & FS_MULTILABEL) != 0) { 856 #ifdef MAC 857 MNT_ILOCK(mp); 858 mp->mnt_flag |= MNT_MULTILABEL; 859 MNT_IUNLOCK(mp); 860 #else 861 printf( 862 "WARNING: %s: multilabel flag on fs but no MAC support\n", 863 mp->mnt_stat.f_mntonname); 864 #endif 865 } 866 if ((fs->fs_flags & FS_ACLS) != 0) { 867 #ifdef UFS_ACL 868 MNT_ILOCK(mp); 869 870 if (mp->mnt_flag & MNT_NFS4ACLS) 871 printf("WARNING: ACLs flag on fs conflicts with " 872 "\"nfsv4acls\" mount option; option ignored\n"); 873 mp->mnt_flag &= ~MNT_NFS4ACLS; 874 mp->mnt_flag |= MNT_ACLS; 875 876 MNT_IUNLOCK(mp); 877 #else 878 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", 879 mp->mnt_stat.f_mntonname); 880 #endif 881 } 882 if ((fs->fs_flags & FS_NFS4ACLS) != 0) { 883 #ifdef UFS_ACL 884 MNT_ILOCK(mp); 885 886 if (mp->mnt_flag & MNT_ACLS) 887 printf("WARNING: NFSv4 ACLs flag on fs conflicts with " 888 "\"acls\" mount option; option ignored\n"); 889 mp->mnt_flag &= ~MNT_ACLS; 890 mp->mnt_flag |= MNT_NFS4ACLS; 891 892 MNT_IUNLOCK(mp); 893 #else 894 printf( 895 "WARNING: %s: NFSv4 ACLs flag on fs but no ACLs support\n", 896 mp->mnt_stat.f_mntonname); 897 #endif 898 } 899 if ((fs->fs_flags & FS_TRIM) != 0) { 900 size = sizeof(int); 901 if (g_io_getattr("GEOM::candelete", cp, &size, 902 &ump->um_candelete) == 0) { 903 if (!ump->um_candelete) 904 printf( 905 "WARNING: %s: TRIM flag on fs but disk does not support TRIM\n", 906 mp->mnt_stat.f_mntonname); 907 } else { 908 printf( 909 "WARNING: %s: TRIM flag on fs but cannot get whether disk supports TRIM\n", 910 mp->mnt_stat.f_mntonname); 911 ump->um_candelete = 0; 912 } 913 } 914 915 ump->um_mountp = mp; 916 ump->um_dev = dev; 917 ump->um_devvp = devvp; 918 ump->um_nindir = fs->fs_nindir; 919 ump->um_bptrtodb = fs->fs_fsbtodb; 920 ump->um_seqinc = fs->fs_frag; 921 for (i = 0; i < MAXQUOTAS; i++) 922 ump->um_quotas[i] = NULLVP; 923 #ifdef UFS_EXTATTR 924 ufs_extattr_uepm_init(&ump->um_extattr); 925 #endif 926 /* 927 * Set FS local "last mounted on" information (NULL pad) 928 */ 929 bzero(fs->fs_fsmnt, MAXMNTLEN); 930 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); 931 mp->mnt_stat.f_iosize = fs->fs_bsize; 932 933 if( mp->mnt_flag & MNT_ROOTFS) { 934 /* 935 * Root mount; update timestamp in mount structure. 936 * this will be used by the common root mount code 937 * to update the system clock. 938 */ 939 mp->mnt_time = fs->fs_time; 940 } 941 942 if (ronly == 0) { 943 fs->fs_mtime = time_second; 944 if ((fs->fs_flags & FS_DOSOFTDEP) && 945 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 946 free(fs->fs_csp, M_UFSMNT); 947 ffs_flushfiles(mp, FORCECLOSE, td); 948 goto out; 949 } 950 if (fs->fs_snapinum[0] != 0) 951 ffs_snapshot_mount(mp); 952 fs->fs_fmod = 1; 953 fs->fs_clean = 0; 954 (void) ffs_sbupdate(ump, MNT_WAIT, 0); 955 } 956 /* 957 * Initialize filesystem stat information in mount struct. 958 */ 959 MNT_ILOCK(mp); 960 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 961 MNTK_EXTENDED_SHARED; 962 MNT_IUNLOCK(mp); 963 #ifdef UFS_EXTATTR 964 #ifdef UFS_EXTATTR_AUTOSTART 965 /* 966 * 967 * Auto-starting does the following: 968 * - check for /.attribute in the fs, and extattr_start if so 969 * - for each file in .attribute, enable that file with 970 * an attribute of the same name. 971 * Not clear how to report errors -- probably eat them. 972 * This would all happen while the filesystem was busy/not 973 * available, so would effectively be "atomic". 974 */ 975 (void) ufs_extattr_autostart(mp, td); 976 #endif /* !UFS_EXTATTR_AUTOSTART */ 977 #endif /* !UFS_EXTATTR */ 978 return (0); 979 out: 980 if (bp) 981 brelse(bp); 982 if (cp != NULL) { 983 DROP_GIANT(); 984 g_topology_lock(); 985 g_vfs_close(cp); 986 g_topology_unlock(); 987 PICKUP_GIANT(); 988 } 989 if (ump) { 990 mtx_destroy(UFS_MTX(ump)); 991 if (mp->mnt_gjprovider != NULL) { 992 free(mp->mnt_gjprovider, M_UFSMNT); 993 mp->mnt_gjprovider = NULL; 994 } 995 free(ump->um_fs, M_UFSMNT); 996 free(ump, M_UFSMNT); 997 mp->mnt_data = NULL; 998 } 999 dev_rel(dev); 1000 return (error); 1001 } 1002 1003 #include <sys/sysctl.h> 1004 static int bigcgs = 0; 1005 SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 1006 1007 /* 1008 * Sanity checks for loading old filesystem superblocks. 1009 * See ffs_oldfscompat_write below for unwound actions. 1010 * 1011 * XXX - Parts get retired eventually. 1012 * Unfortunately new bits get added. 1013 */ 1014 static void 1015 ffs_oldfscompat_read(fs, ump, sblockloc) 1016 struct fs *fs; 1017 struct ufsmount *ump; 1018 ufs2_daddr_t sblockloc; 1019 { 1020 off_t maxfilesize; 1021 1022 /* 1023 * If not yet done, update fs_flags location and value of fs_sblockloc. 1024 */ 1025 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 1026 fs->fs_flags = fs->fs_old_flags; 1027 fs->fs_old_flags |= FS_FLAGS_UPDATED; 1028 fs->fs_sblockloc = sblockloc; 1029 } 1030 /* 1031 * If not yet done, update UFS1 superblock with new wider fields. 1032 */ 1033 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 1034 fs->fs_maxbsize = fs->fs_bsize; 1035 fs->fs_time = fs->fs_old_time; 1036 fs->fs_size = fs->fs_old_size; 1037 fs->fs_dsize = fs->fs_old_dsize; 1038 fs->fs_csaddr = fs->fs_old_csaddr; 1039 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1040 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1041 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1042 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1043 } 1044 if (fs->fs_magic == FS_UFS1_MAGIC && 1045 fs->fs_old_inodefmt < FS_44INODEFMT) { 1046 fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; 1047 fs->fs_qbmask = ~fs->fs_bmask; 1048 fs->fs_qfmask = ~fs->fs_fmask; 1049 } 1050 if (fs->fs_magic == FS_UFS1_MAGIC) { 1051 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 1052 maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; 1053 if (fs->fs_maxfilesize > maxfilesize) 1054 fs->fs_maxfilesize = maxfilesize; 1055 } 1056 /* Compatibility for old filesystems */ 1057 if (fs->fs_avgfilesize <= 0) 1058 fs->fs_avgfilesize = AVFILESIZ; 1059 if (fs->fs_avgfpdir <= 0) 1060 fs->fs_avgfpdir = AFPDIR; 1061 if (bigcgs) { 1062 fs->fs_save_cgsize = fs->fs_cgsize; 1063 fs->fs_cgsize = fs->fs_bsize; 1064 } 1065 } 1066 1067 /* 1068 * Unwinding superblock updates for old filesystems. 1069 * See ffs_oldfscompat_read above for details. 1070 * 1071 * XXX - Parts get retired eventually. 1072 * Unfortunately new bits get added. 1073 */ 1074 void 1075 ffs_oldfscompat_write(fs, ump) 1076 struct fs *fs; 1077 struct ufsmount *ump; 1078 { 1079 1080 /* 1081 * Copy back UFS2 updated fields that UFS1 inspects. 1082 */ 1083 if (fs->fs_magic == FS_UFS1_MAGIC) { 1084 fs->fs_old_time = fs->fs_time; 1085 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1086 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1087 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1088 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1089 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 1090 } 1091 if (bigcgs) { 1092 fs->fs_cgsize = fs->fs_save_cgsize; 1093 fs->fs_save_cgsize = 0; 1094 } 1095 } 1096 1097 /* 1098 * unmount system call 1099 */ 1100 static int 1101 ffs_unmount(mp, mntflags) 1102 struct mount *mp; 1103 int mntflags; 1104 { 1105 struct thread *td; 1106 struct ufsmount *ump = VFSTOUFS(mp); 1107 struct fs *fs; 1108 int error, flags, susp; 1109 #ifdef UFS_EXTATTR 1110 int e_restart; 1111 #endif 1112 1113 flags = 0; 1114 td = curthread; 1115 fs = ump->um_fs; 1116 if (mntflags & MNT_FORCE) { 1117 flags |= FORCECLOSE; 1118 susp = fs->fs_ronly != 0; 1119 } else 1120 susp = 0; 1121 #ifdef UFS_EXTATTR 1122 if ((error = ufs_extattr_stop(mp, td))) { 1123 if (error != EOPNOTSUPP) 1124 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 1125 error); 1126 e_restart = 0; 1127 } else { 1128 ufs_extattr_uepm_destroy(&ump->um_extattr); 1129 e_restart = 1; 1130 } 1131 #endif 1132 if (susp) { 1133 /* 1134 * dounmount already called vn_start_write(). 1135 */ 1136 for (;;) { 1137 vn_finished_write(mp); 1138 if ((error = vfs_write_suspend(mp)) != 0) 1139 return (error); 1140 MNT_ILOCK(mp); 1141 if (mp->mnt_kern_flag & MNTK_SUSPENDED) { 1142 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | 1143 MNTK_SUSPEND2); 1144 wakeup(&mp->mnt_flag); 1145 MNT_IUNLOCK(mp); 1146 td->td_pflags |= TDP_IGNSUSP; 1147 break; 1148 } 1149 MNT_IUNLOCK(mp); 1150 vn_start_write(NULL, &mp, V_WAIT); 1151 } 1152 } 1153 if (mp->mnt_flag & MNT_SOFTDEP) 1154 error = softdep_flushfiles(mp, flags, td); 1155 else 1156 error = ffs_flushfiles(mp, flags, td); 1157 if (error != 0 && error != ENXIO) 1158 goto fail; 1159 1160 UFS_LOCK(ump); 1161 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1162 printf("%s: unmount pending error: blocks %jd files %d\n", 1163 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 1164 fs->fs_pendinginodes); 1165 fs->fs_pendingblocks = 0; 1166 fs->fs_pendinginodes = 0; 1167 } 1168 UFS_UNLOCK(ump); 1169 softdep_unmount(mp); 1170 if (fs->fs_ronly == 0) { 1171 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 1172 error = ffs_sbupdate(ump, MNT_WAIT, 0); 1173 if (error && error != ENXIO) { 1174 fs->fs_clean = 0; 1175 goto fail; 1176 } 1177 } 1178 if (susp) { 1179 vfs_write_resume(mp); 1180 vn_start_write(NULL, &mp, V_WAIT); 1181 } 1182 DROP_GIANT(); 1183 g_topology_lock(); 1184 g_vfs_close(ump->um_cp); 1185 g_topology_unlock(); 1186 PICKUP_GIANT(); 1187 vrele(ump->um_devvp); 1188 dev_rel(ump->um_dev); 1189 mtx_destroy(UFS_MTX(ump)); 1190 if (mp->mnt_gjprovider != NULL) { 1191 free(mp->mnt_gjprovider, M_UFSMNT); 1192 mp->mnt_gjprovider = NULL; 1193 } 1194 free(fs->fs_csp, M_UFSMNT); 1195 free(fs, M_UFSMNT); 1196 free(ump, M_UFSMNT); 1197 mp->mnt_data = NULL; 1198 MNT_ILOCK(mp); 1199 mp->mnt_flag &= ~MNT_LOCAL; 1200 MNT_IUNLOCK(mp); 1201 return (error); 1202 1203 fail: 1204 if (susp) { 1205 vfs_write_resume(mp); 1206 vn_start_write(NULL, &mp, V_WAIT); 1207 } 1208 #ifdef UFS_EXTATTR 1209 if (e_restart) { 1210 ufs_extattr_uepm_init(&ump->um_extattr); 1211 #ifdef UFS_EXTATTR_AUTOSTART 1212 (void) ufs_extattr_autostart(mp, td); 1213 #endif 1214 } 1215 #endif 1216 1217 return (error); 1218 } 1219 1220 /* 1221 * Flush out all the files in a filesystem. 1222 */ 1223 int 1224 ffs_flushfiles(mp, flags, td) 1225 struct mount *mp; 1226 int flags; 1227 struct thread *td; 1228 { 1229 struct ufsmount *ump; 1230 int error; 1231 1232 ump = VFSTOUFS(mp); 1233 #ifdef QUOTA 1234 if (mp->mnt_flag & MNT_QUOTA) { 1235 int i; 1236 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 1237 if (error) 1238 return (error); 1239 for (i = 0; i < MAXQUOTAS; i++) { 1240 quotaoff(td, mp, i); 1241 } 1242 /* 1243 * Here we fall through to vflush again to ensure 1244 * that we have gotten rid of all the system vnodes. 1245 */ 1246 } 1247 #endif 1248 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 1249 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 1250 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 1251 return (error); 1252 ffs_snapshot_unmount(mp); 1253 flags |= FORCECLOSE; 1254 /* 1255 * Here we fall through to vflush again to ensure 1256 * that we have gotten rid of all the system vnodes. 1257 */ 1258 } 1259 /* 1260 * Flush all the files. 1261 */ 1262 if ((error = vflush(mp, 0, flags, td)) != 0) 1263 return (error); 1264 /* 1265 * Flush filesystem metadata. 1266 */ 1267 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1268 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1269 VOP_UNLOCK(ump->um_devvp, 0); 1270 return (error); 1271 } 1272 1273 /* 1274 * Get filesystem statistics. 1275 */ 1276 static int 1277 ffs_statfs(mp, sbp) 1278 struct mount *mp; 1279 struct statfs *sbp; 1280 { 1281 struct ufsmount *ump; 1282 struct fs *fs; 1283 1284 ump = VFSTOUFS(mp); 1285 fs = ump->um_fs; 1286 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1287 panic("ffs_statfs"); 1288 sbp->f_version = STATFS_VERSION; 1289 sbp->f_bsize = fs->fs_fsize; 1290 sbp->f_iosize = fs->fs_bsize; 1291 sbp->f_blocks = fs->fs_dsize; 1292 UFS_LOCK(ump); 1293 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1294 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1295 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1296 dbtofsb(fs, fs->fs_pendingblocks); 1297 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1298 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1299 UFS_UNLOCK(ump); 1300 sbp->f_namemax = NAME_MAX; 1301 return (0); 1302 } 1303 1304 /* 1305 * Go through the disk queues to initiate sandbagged IO; 1306 * go through the inodes to write those that have been modified; 1307 * initiate the writing of the super block if it has been modified. 1308 * 1309 * Note: we are always called with the filesystem marked `MPBUSY'. 1310 */ 1311 static int 1312 ffs_sync(mp, waitfor) 1313 struct mount *mp; 1314 int waitfor; 1315 { 1316 struct vnode *mvp, *vp, *devvp; 1317 struct thread *td; 1318 struct inode *ip; 1319 struct ufsmount *ump = VFSTOUFS(mp); 1320 struct fs *fs; 1321 int error, count, wait, lockreq, allerror = 0; 1322 int suspend; 1323 int suspended; 1324 int secondary_writes; 1325 int secondary_accwrites; 1326 int softdep_deps; 1327 int softdep_accdeps; 1328 struct bufobj *bo; 1329 1330 td = curthread; 1331 fs = ump->um_fs; 1332 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1333 printf("fs = %s\n", fs->fs_fsmnt); 1334 panic("ffs_sync: rofs mod"); 1335 } 1336 /* 1337 * Write back each (modified) inode. 1338 */ 1339 wait = 0; 1340 suspend = 0; 1341 suspended = 0; 1342 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1343 if (waitfor == MNT_SUSPEND) { 1344 suspend = 1; 1345 waitfor = MNT_WAIT; 1346 } 1347 if (waitfor == MNT_WAIT) { 1348 wait = 1; 1349 lockreq = LK_EXCLUSIVE; 1350 } 1351 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1352 MNT_ILOCK(mp); 1353 loop: 1354 /* Grab snapshot of secondary write counts */ 1355 secondary_writes = mp->mnt_secondary_writes; 1356 secondary_accwrites = mp->mnt_secondary_accwrites; 1357 1358 /* Grab snapshot of softdep dependency counts */ 1359 MNT_IUNLOCK(mp); 1360 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); 1361 MNT_ILOCK(mp); 1362 1363 MNT_VNODE_FOREACH(vp, mp, mvp) { 1364 /* 1365 * Depend on the mntvnode_slock to keep things stable enough 1366 * for a quick test. Since there might be hundreds of 1367 * thousands of vnodes, we cannot afford even a subroutine 1368 * call unless there's a good chance that we have work to do. 1369 */ 1370 VI_LOCK(vp); 1371 if (vp->v_iflag & VI_DOOMED) { 1372 VI_UNLOCK(vp); 1373 continue; 1374 } 1375 ip = VTOI(vp); 1376 if (vp->v_type == VNON || ((ip->i_flag & 1377 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1378 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1379 VI_UNLOCK(vp); 1380 continue; 1381 } 1382 MNT_IUNLOCK(mp); 1383 if ((error = vget(vp, lockreq, td)) != 0) { 1384 MNT_ILOCK(mp); 1385 if (error == ENOENT || error == ENOLCK) { 1386 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1387 goto loop; 1388 } 1389 continue; 1390 } 1391 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1392 allerror = error; 1393 vput(vp); 1394 MNT_ILOCK(mp); 1395 } 1396 MNT_IUNLOCK(mp); 1397 /* 1398 * Force stale filesystem control information to be flushed. 1399 */ 1400 if (waitfor == MNT_WAIT) { 1401 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1402 allerror = error; 1403 /* Flushed work items may create new vnodes to clean */ 1404 if (allerror == 0 && count) { 1405 MNT_ILOCK(mp); 1406 goto loop; 1407 } 1408 } 1409 #ifdef QUOTA 1410 qsync(mp); 1411 #endif 1412 devvp = ump->um_devvp; 1413 bo = &devvp->v_bufobj; 1414 BO_LOCK(bo); 1415 if (waitfor != MNT_LAZY && 1416 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1417 BO_UNLOCK(bo); 1418 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1419 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1420 allerror = error; 1421 VOP_UNLOCK(devvp, 0); 1422 if (allerror == 0 && waitfor == MNT_WAIT) { 1423 MNT_ILOCK(mp); 1424 goto loop; 1425 } 1426 } else if (suspend != 0) { 1427 if (softdep_check_suspend(mp, 1428 devvp, 1429 softdep_deps, 1430 softdep_accdeps, 1431 secondary_writes, 1432 secondary_accwrites) != 0) 1433 goto loop; /* More work needed */ 1434 mtx_assert(MNT_MTX(mp), MA_OWNED); 1435 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; 1436 MNT_IUNLOCK(mp); 1437 suspended = 1; 1438 } else 1439 BO_UNLOCK(bo); 1440 /* 1441 * Write back modified superblock. 1442 */ 1443 if (fs->fs_fmod != 0 && 1444 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) 1445 allerror = error; 1446 return (allerror); 1447 } 1448 1449 int 1450 ffs_vget(mp, ino, flags, vpp) 1451 struct mount *mp; 1452 ino_t ino; 1453 int flags; 1454 struct vnode **vpp; 1455 { 1456 return (ffs_vgetf(mp, ino, flags, vpp, 0)); 1457 } 1458 1459 int 1460 ffs_vgetf(mp, ino, flags, vpp, ffs_flags) 1461 struct mount *mp; 1462 ino_t ino; 1463 int flags; 1464 struct vnode **vpp; 1465 int ffs_flags; 1466 { 1467 struct fs *fs; 1468 struct inode *ip; 1469 struct ufsmount *ump; 1470 struct buf *bp; 1471 struct vnode *vp; 1472 struct cdev *dev; 1473 int error; 1474 1475 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1476 if (error || *vpp != NULL) 1477 return (error); 1478 1479 /* 1480 * We must promote to an exclusive lock for vnode creation. This 1481 * can happen if lookup is passed LOCKSHARED. 1482 */ 1483 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1484 flags &= ~LK_TYPE_MASK; 1485 flags |= LK_EXCLUSIVE; 1486 } 1487 1488 /* 1489 * We do not lock vnode creation as it is believed to be too 1490 * expensive for such rare case as simultaneous creation of vnode 1491 * for same ino by different processes. We just allow them to race 1492 * and check later to decide who wins. Let the race begin! 1493 */ 1494 1495 ump = VFSTOUFS(mp); 1496 dev = ump->um_dev; 1497 fs = ump->um_fs; 1498 1499 /* 1500 * If this malloc() is performed after the getnewvnode() 1501 * it might block, leaving a vnode with a NULL v_data to be 1502 * found by ffs_sync() if a sync happens to fire right then, 1503 * which will cause a panic because ffs_sync() blindly 1504 * dereferences vp->v_data (as well it should). 1505 */ 1506 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1507 1508 /* Allocate a new vnode/inode. */ 1509 if (fs->fs_magic == FS_UFS1_MAGIC) 1510 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1511 else 1512 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1513 if (error) { 1514 *vpp = NULL; 1515 uma_zfree(uma_inode, ip); 1516 return (error); 1517 } 1518 /* 1519 * FFS supports recursive locking. 1520 */ 1521 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 1522 VN_LOCK_AREC(vp); 1523 vp->v_data = ip; 1524 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1525 ip->i_vnode = vp; 1526 ip->i_ump = ump; 1527 ip->i_fs = fs; 1528 ip->i_dev = dev; 1529 ip->i_number = ino; 1530 ip->i_ea_refs = 0; 1531 #ifdef QUOTA 1532 { 1533 int i; 1534 for (i = 0; i < MAXQUOTAS; i++) 1535 ip->i_dquot[i] = NODQUOT; 1536 } 1537 #endif 1538 1539 if (ffs_flags & FFSV_FORCEINSMQ) 1540 vp->v_vflag |= VV_FORCEINSMQ; 1541 error = insmntque(vp, mp); 1542 if (error != 0) { 1543 uma_zfree(uma_inode, ip); 1544 *vpp = NULL; 1545 return (error); 1546 } 1547 vp->v_vflag &= ~VV_FORCEINSMQ; 1548 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1549 if (error || *vpp != NULL) 1550 return (error); 1551 1552 /* Read in the disk contents for the inode, copy into the inode. */ 1553 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1554 (int)fs->fs_bsize, NOCRED, &bp); 1555 if (error) { 1556 /* 1557 * The inode does not contain anything useful, so it would 1558 * be misleading to leave it on its hash chain. With mode 1559 * still zero, it will be unlinked and returned to the free 1560 * list by vput(). 1561 */ 1562 brelse(bp); 1563 vput(vp); 1564 *vpp = NULL; 1565 return (error); 1566 } 1567 if (ip->i_ump->um_fstype == UFS1) 1568 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1569 else 1570 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1571 ffs_load_inode(bp, ip, fs, ino); 1572 if (DOINGSOFTDEP(vp)) 1573 softdep_load_inodeblock(ip); 1574 else 1575 ip->i_effnlink = ip->i_nlink; 1576 bqrelse(bp); 1577 1578 /* 1579 * Initialize the vnode from the inode, check for aliases. 1580 * Note that the underlying vnode may have changed. 1581 */ 1582 if (ip->i_ump->um_fstype == UFS1) 1583 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1584 else 1585 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1586 if (error) { 1587 vput(vp); 1588 *vpp = NULL; 1589 return (error); 1590 } 1591 1592 /* 1593 * Finish inode initialization. 1594 */ 1595 if (vp->v_type != VFIFO) { 1596 /* FFS supports shared locking for all files except fifos. */ 1597 VN_LOCK_ASHARE(vp); 1598 } 1599 1600 /* 1601 * Set up a generation number for this inode if it does not 1602 * already have one. This should only happen on old filesystems. 1603 */ 1604 if (ip->i_gen == 0) { 1605 ip->i_gen = arc4random() / 2 + 1; 1606 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1607 ip->i_flag |= IN_MODIFIED; 1608 DIP_SET(ip, i_gen, ip->i_gen); 1609 } 1610 } 1611 #ifdef MAC 1612 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1613 /* 1614 * If this vnode is already allocated, and we're running 1615 * multi-label, attempt to perform a label association 1616 * from the extended attributes on the inode. 1617 */ 1618 error = mac_vnode_associate_extattr(mp, vp); 1619 if (error) { 1620 /* ufs_inactive will release ip->i_devvp ref. */ 1621 vput(vp); 1622 *vpp = NULL; 1623 return (error); 1624 } 1625 } 1626 #endif 1627 1628 *vpp = vp; 1629 return (0); 1630 } 1631 1632 /* 1633 * File handle to vnode 1634 * 1635 * Have to be really careful about stale file handles: 1636 * - check that the inode number is valid 1637 * - call ffs_vget() to get the locked inode 1638 * - check for an unallocated inode (i_mode == 0) 1639 * - check that the given client host has export rights and return 1640 * those rights via. exflagsp and credanonp 1641 */ 1642 static int 1643 ffs_fhtovp(mp, fhp, flags, vpp) 1644 struct mount *mp; 1645 struct fid *fhp; 1646 int flags; 1647 struct vnode **vpp; 1648 { 1649 struct ufid *ufhp; 1650 struct fs *fs; 1651 1652 ufhp = (struct ufid *)fhp; 1653 fs = VFSTOUFS(mp)->um_fs; 1654 if (ufhp->ufid_ino < ROOTINO || 1655 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1656 return (ESTALE); 1657 return (ufs_fhtovp(mp, ufhp, flags, vpp)); 1658 } 1659 1660 /* 1661 * Initialize the filesystem. 1662 */ 1663 static int 1664 ffs_init(vfsp) 1665 struct vfsconf *vfsp; 1666 { 1667 1668 softdep_initialize(); 1669 return (ufs_init(vfsp)); 1670 } 1671 1672 /* 1673 * Undo the work of ffs_init(). 1674 */ 1675 static int 1676 ffs_uninit(vfsp) 1677 struct vfsconf *vfsp; 1678 { 1679 int ret; 1680 1681 ret = ufs_uninit(vfsp); 1682 softdep_uninitialize(); 1683 return (ret); 1684 } 1685 1686 /* 1687 * Write a superblock and associated information back to disk. 1688 */ 1689 int 1690 ffs_sbupdate(mp, waitfor, suspended) 1691 struct ufsmount *mp; 1692 int waitfor; 1693 int suspended; 1694 { 1695 struct fs *fs = mp->um_fs; 1696 struct buf *sbbp; 1697 struct buf *bp; 1698 int blks; 1699 void *space; 1700 int i, size, error, allerror = 0; 1701 1702 if (fs->fs_ronly == 1 && 1703 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1704 (MNT_RDONLY | MNT_UPDATE)) 1705 panic("ffs_sbupdate: write read-only filesystem"); 1706 /* 1707 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1708 */ 1709 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1710 0, 0, 0); 1711 /* 1712 * First write back the summary information. 1713 */ 1714 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1715 space = fs->fs_csp; 1716 for (i = 0; i < blks; i += fs->fs_frag) { 1717 size = fs->fs_bsize; 1718 if (i + fs->fs_frag > blks) 1719 size = (blks - i) * fs->fs_fsize; 1720 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1721 size, 0, 0, 0); 1722 bcopy(space, bp->b_data, (u_int)size); 1723 space = (char *)space + size; 1724 if (suspended) 1725 bp->b_flags |= B_VALIDSUSPWRT; 1726 if (waitfor != MNT_WAIT) 1727 bawrite(bp); 1728 else if ((error = bwrite(bp)) != 0) 1729 allerror = error; 1730 } 1731 /* 1732 * Now write back the superblock itself. If any errors occurred 1733 * up to this point, then fail so that the superblock avoids 1734 * being written out as clean. 1735 */ 1736 if (allerror) { 1737 brelse(sbbp); 1738 return (allerror); 1739 } 1740 bp = sbbp; 1741 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1742 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1743 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1744 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1745 fs->fs_sblockloc = SBLOCK_UFS1; 1746 } 1747 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1748 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1749 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1750 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1751 fs->fs_sblockloc = SBLOCK_UFS2; 1752 } 1753 fs->fs_fmod = 0; 1754 fs->fs_time = time_second; 1755 if (fs->fs_flags & FS_DOSOFTDEP) 1756 softdep_setup_sbupdate(mp, (struct fs *)bp->b_data, bp); 1757 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1758 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1759 if (suspended) 1760 bp->b_flags |= B_VALIDSUSPWRT; 1761 if (waitfor != MNT_WAIT) 1762 bawrite(bp); 1763 else if ((error = bwrite(bp)) != 0) 1764 allerror = error; 1765 return (allerror); 1766 } 1767 1768 static int 1769 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1770 int attrnamespace, const char *attrname) 1771 { 1772 1773 #ifdef UFS_EXTATTR 1774 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1775 attrname)); 1776 #else 1777 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1778 attrname)); 1779 #endif 1780 } 1781 1782 static void 1783 ffs_ifree(struct ufsmount *ump, struct inode *ip) 1784 { 1785 1786 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1787 uma_zfree(uma_ufs1, ip->i_din1); 1788 else if (ip->i_din2 != NULL) 1789 uma_zfree(uma_ufs2, ip->i_din2); 1790 uma_zfree(uma_inode, ip); 1791 } 1792 1793 static int dobkgrdwrite = 1; 1794 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1795 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1796 1797 /* 1798 * Complete a background write started from bwrite. 1799 */ 1800 static void 1801 ffs_backgroundwritedone(struct buf *bp) 1802 { 1803 struct bufobj *bufobj; 1804 struct buf *origbp; 1805 1806 /* 1807 * Find the original buffer that we are writing. 1808 */ 1809 bufobj = bp->b_bufobj; 1810 BO_LOCK(bufobj); 1811 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1812 panic("backgroundwritedone: lost buffer"); 1813 /* Grab an extra reference to be dropped by the bufdone() below. */ 1814 bufobj_wrefl(bufobj); 1815 BO_UNLOCK(bufobj); 1816 /* 1817 * Process dependencies then return any unfinished ones. 1818 */ 1819 if (!LIST_EMPTY(&bp->b_dep)) 1820 buf_complete(bp); 1821 #ifdef SOFTUPDATES 1822 if (!LIST_EMPTY(&bp->b_dep)) 1823 softdep_move_dependencies(bp, origbp); 1824 #endif 1825 /* 1826 * This buffer is marked B_NOCACHE so when it is released 1827 * by biodone it will be tossed. 1828 */ 1829 bp->b_flags |= B_NOCACHE; 1830 bp->b_flags &= ~B_CACHE; 1831 bufdone(bp); 1832 BO_LOCK(bufobj); 1833 /* 1834 * Clear the BV_BKGRDINPROG flag in the original buffer 1835 * and awaken it if it is waiting for the write to complete. 1836 * If BV_BKGRDINPROG is not set in the original buffer it must 1837 * have been released and re-instantiated - which is not legal. 1838 */ 1839 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1840 ("backgroundwritedone: lost buffer2")); 1841 origbp->b_vflags &= ~BV_BKGRDINPROG; 1842 if (origbp->b_vflags & BV_BKGRDWAIT) { 1843 origbp->b_vflags &= ~BV_BKGRDWAIT; 1844 wakeup(&origbp->b_xflags); 1845 } 1846 BO_UNLOCK(bufobj); 1847 } 1848 1849 1850 /* 1851 * Write, release buffer on completion. (Done by iodone 1852 * if async). Do not bother writing anything if the buffer 1853 * is invalid. 1854 * 1855 * Note that we set B_CACHE here, indicating that buffer is 1856 * fully valid and thus cacheable. This is true even of NFS 1857 * now so we set it generally. This could be set either here 1858 * or in biodone() since the I/O is synchronous. We put it 1859 * here. 1860 */ 1861 static int 1862 ffs_bufwrite(struct buf *bp) 1863 { 1864 int oldflags, s; 1865 struct buf *newbp; 1866 1867 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1868 if (bp->b_flags & B_INVAL) { 1869 brelse(bp); 1870 return (0); 1871 } 1872 1873 oldflags = bp->b_flags; 1874 1875 if (!BUF_ISLOCKED(bp)) 1876 panic("bufwrite: buffer is not busy???"); 1877 s = splbio(); 1878 /* 1879 * If a background write is already in progress, delay 1880 * writing this block if it is asynchronous. Otherwise 1881 * wait for the background write to complete. 1882 */ 1883 BO_LOCK(bp->b_bufobj); 1884 if (bp->b_vflags & BV_BKGRDINPROG) { 1885 if (bp->b_flags & B_ASYNC) { 1886 BO_UNLOCK(bp->b_bufobj); 1887 splx(s); 1888 bdwrite(bp); 1889 return (0); 1890 } 1891 bp->b_vflags |= BV_BKGRDWAIT; 1892 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1893 if (bp->b_vflags & BV_BKGRDINPROG) 1894 panic("bufwrite: still writing"); 1895 } 1896 BO_UNLOCK(bp->b_bufobj); 1897 1898 /* 1899 * If this buffer is marked for background writing and we 1900 * do not have to wait for it, make a copy and write the 1901 * copy so as to leave this buffer ready for further use. 1902 * 1903 * This optimization eats a lot of memory. If we have a page 1904 * or buffer shortfall we can't do it. 1905 */ 1906 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1907 (bp->b_flags & B_ASYNC) && 1908 !vm_page_count_severe() && 1909 !buf_dirty_count_severe()) { 1910 KASSERT(bp->b_iodone == NULL, 1911 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1912 1913 /* get a new block */ 1914 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); 1915 if (newbp == NULL) 1916 goto normal_write; 1917 1918 /* 1919 * set it to be identical to the old block. We have to 1920 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1921 * to avoid confusing the splay tree and gbincore(). 1922 */ 1923 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1924 newbp->b_lblkno = bp->b_lblkno; 1925 newbp->b_xflags |= BX_BKGRDMARKER; 1926 BO_LOCK(bp->b_bufobj); 1927 bp->b_vflags |= BV_BKGRDINPROG; 1928 bgetvp(bp->b_vp, newbp); 1929 BO_UNLOCK(bp->b_bufobj); 1930 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1931 newbp->b_blkno = bp->b_blkno; 1932 newbp->b_offset = bp->b_offset; 1933 newbp->b_iodone = ffs_backgroundwritedone; 1934 newbp->b_flags |= B_ASYNC; 1935 newbp->b_flags &= ~B_INVAL; 1936 1937 #ifdef SOFTUPDATES 1938 /* 1939 * Move over the dependencies. If there are rollbacks, 1940 * leave the parent buffer dirtied as it will need to 1941 * be written again. 1942 */ 1943 if (LIST_EMPTY(&bp->b_dep) || 1944 softdep_move_dependencies(bp, newbp) == 0) 1945 bundirty(bp); 1946 #else 1947 bundirty(bp); 1948 #endif 1949 1950 /* 1951 * Initiate write on the copy, release the original to 1952 * the B_LOCKED queue so that it cannot go away until 1953 * the background write completes. If not locked it could go 1954 * away and then be reconstituted while it was being written. 1955 * If the reconstituted buffer were written, we could end up 1956 * with two background copies being written at the same time. 1957 */ 1958 bqrelse(bp); 1959 bp = newbp; 1960 } else 1961 /* Mark the buffer clean */ 1962 bundirty(bp); 1963 1964 1965 /* Let the normal bufwrite do the rest for us */ 1966 normal_write: 1967 return (bufwrite(bp)); 1968 } 1969 1970 1971 static void 1972 ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1973 { 1974 struct vnode *vp; 1975 int error; 1976 struct buf *tbp; 1977 int nocopy; 1978 1979 vp = bo->__bo_vnode; 1980 if (bp->b_iocmd == BIO_WRITE) { 1981 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 1982 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 1983 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 1984 panic("ffs_geom_strategy: bad I/O"); 1985 nocopy = bp->b_flags & B_NOCOPY; 1986 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); 1987 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && 1988 vp->v_rdev->si_snapdata != NULL) { 1989 if ((bp->b_flags & B_CLUSTER) != 0) { 1990 runningbufwakeup(bp); 1991 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 1992 b_cluster.cluster_entry) { 1993 error = ffs_copyonwrite(vp, tbp); 1994 if (error != 0 && 1995 error != EOPNOTSUPP) { 1996 bp->b_error = error; 1997 bp->b_ioflags |= BIO_ERROR; 1998 bufdone(bp); 1999 return; 2000 } 2001 } 2002 bp->b_runningbufspace = bp->b_bufsize; 2003 atomic_add_long(&runningbufspace, 2004 bp->b_runningbufspace); 2005 } else { 2006 error = ffs_copyonwrite(vp, bp); 2007 if (error != 0 && error != EOPNOTSUPP) { 2008 bp->b_error = error; 2009 bp->b_ioflags |= BIO_ERROR; 2010 bufdone(bp); 2011 return; 2012 } 2013 } 2014 } 2015 #ifdef SOFTUPDATES 2016 if ((bp->b_flags & B_CLUSTER) != 0) { 2017 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, 2018 b_cluster.cluster_entry) { 2019 if (!LIST_EMPTY(&tbp->b_dep)) 2020 buf_start(tbp); 2021 } 2022 } else { 2023 if (!LIST_EMPTY(&bp->b_dep)) 2024 buf_start(bp); 2025 } 2026 2027 #endif 2028 } 2029 g_vfs_strategy(bo, bp); 2030 } 2031 2032 #ifdef DDB 2033 2034 static void 2035 db_print_ffs(struct ufsmount *ump) 2036 { 2037 db_printf("mp %p %s devvp %p fs %p su_wl %d su_wl_in %d su_deps %d " 2038 "su_req %d\n", 2039 ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname, 2040 ump->um_devvp, ump->um_fs, ump->softdep_on_worklist, 2041 ump->softdep_on_worklist_inprogress, ump->softdep_deps, 2042 ump->softdep_req); 2043 } 2044 2045 DB_SHOW_COMMAND(ffs, db_show_ffs) 2046 { 2047 struct mount *mp; 2048 struct ufsmount *ump; 2049 2050 if (have_addr) { 2051 ump = VFSTOUFS((struct mount *)addr); 2052 db_print_ffs(ump); 2053 return; 2054 } 2055 2056 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2057 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) 2058 db_print_ffs(VFSTOUFS(mp)); 2059 } 2060 } 2061 2062 #endif /* DDB */ 2063