ffs_vfsops.c revision 146802
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: head/sys/ufs/ffs/ffs_vfsops.c 146802 2005-05-30 07:04:15Z jeff $"); 34 35#include "opt_mac.h" 36#include "opt_quota.h" 37#include "opt_ufs.h" 38#include "opt_ffs.h" 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/namei.h> 43#include <sys/proc.h> 44#include <sys/kernel.h> 45#include <sys/mac.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 <ufs/ufs/extattr.h> 56#include <ufs/ufs/quota.h> 57#include <ufs/ufs/ufsmount.h> 58#include <ufs/ufs/inode.h> 59#include <ufs/ufs/ufs_extern.h> 60 61#include <ufs/ffs/fs.h> 62#include <ufs/ffs/ffs_extern.h> 63 64#include <vm/vm.h> 65#include <vm/uma.h> 66#include <vm/vm_page.h> 67 68#include <geom/geom.h> 69#include <geom/geom_vfs.h> 70 71static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; 72 73static int ffs_sbupdate(struct ufsmount *, int); 74static int ffs_reload(struct mount *, struct thread *); 75static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); 76static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, 77 ufs2_daddr_t); 78static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 79static void ffs_ifree(struct ufsmount *ump, struct inode *ip); 80static vfs_init_t ffs_init; 81static vfs_uninit_t ffs_uninit; 82static vfs_extattrctl_t ffs_extattrctl; 83static vfs_cmount_t ffs_cmount; 84static vfs_unmount_t ffs_unmount; 85static vfs_mount_t ffs_mount; 86static vfs_statfs_t ffs_statfs; 87static vfs_fhtovp_t ffs_fhtovp; 88static vfs_vptofh_t ffs_vptofh; 89static vfs_sync_t ffs_sync; 90 91static struct vfsops ufs_vfsops = { 92 .vfs_extattrctl = ffs_extattrctl, 93 .vfs_fhtovp = ffs_fhtovp, 94 .vfs_init = ffs_init, 95 .vfs_mount = ffs_mount, 96 .vfs_cmount = ffs_cmount, 97 .vfs_quotactl = ufs_quotactl, 98 .vfs_root = ufs_root, 99 .vfs_statfs = ffs_statfs, 100 .vfs_sync = ffs_sync, 101 .vfs_uninit = ffs_uninit, 102 .vfs_unmount = ffs_unmount, 103 .vfs_vget = ffs_vget, 104 .vfs_vptofh = ffs_vptofh, 105}; 106 107VFS_SET(ufs_vfsops, ufs, 0); 108 109static b_strategy_t ffs_geom_strategy; 110static b_write_t ffs_bufwrite; 111 112static struct buf_ops ffs_ops = { 113 .bop_name = "FFS", 114 .bop_write = ffs_bufwrite, 115 .bop_strategy = ffs_geom_strategy, 116 .bop_sync = bufsync, 117}; 118 119static const char *ffs_opts[] = { "from", "export", NULL }; 120 121static int 122ffs_mount(struct mount *mp, struct thread *td) 123{ 124 struct vnode *devvp; 125 struct ufsmount *ump = 0; 126 struct fs *fs; 127 int error, flags; 128 mode_t accessmode; 129 struct nameidata ndp; 130 struct export_args export; 131 char *fspec; 132 133 if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) 134 return (EINVAL); 135 if (uma_inode == NULL) { 136 uma_inode = uma_zcreate("FFS inode", 137 sizeof(struct inode), NULL, NULL, NULL, NULL, 138 UMA_ALIGN_PTR, 0); 139 uma_ufs1 = uma_zcreate("FFS1 dinode", 140 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, 141 UMA_ALIGN_PTR, 0); 142 uma_ufs2 = uma_zcreate("FFS2 dinode", 143 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, 144 UMA_ALIGN_PTR, 0); 145 } 146 147 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 148 if (error) 149 return (error); 150 151 /* 152 * If updating, check whether changing from read-only to 153 * read/write; if there is no device name, that's all we do. 154 */ 155 if (mp->mnt_flag & MNT_UPDATE) { 156 ump = VFSTOUFS(mp); 157 fs = ump->um_fs; 158 devvp = ump->um_devvp; 159 if (fs->fs_ronly == 0 && 160 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 161 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 162 return (error); 163 /* 164 * Flush any dirty data. 165 */ 166 if ((error = ffs_sync(mp, MNT_WAIT, td)) != 0) { 167 vn_finished_write(mp); 168 return (error); 169 } 170 /* 171 * Check for and optionally get rid of files open 172 * for writing. 173 */ 174 flags = WRITECLOSE; 175 if (mp->mnt_flag & MNT_FORCE) 176 flags |= FORCECLOSE; 177 if (mp->mnt_flag & MNT_SOFTDEP) { 178 error = softdep_flushfiles(mp, flags, td); 179 } else { 180 error = ffs_flushfiles(mp, flags, td); 181 } 182 if (error) { 183 vn_finished_write(mp); 184 return (error); 185 } 186 if (fs->fs_pendingblocks != 0 || 187 fs->fs_pendinginodes != 0) { 188 printf("%s: %s: blocks %jd files %d\n", 189 fs->fs_fsmnt, "update error", 190 (intmax_t)fs->fs_pendingblocks, 191 fs->fs_pendinginodes); 192 fs->fs_pendingblocks = 0; 193 fs->fs_pendinginodes = 0; 194 } 195 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) 196 fs->fs_clean = 1; 197 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 198 fs->fs_ronly = 0; 199 fs->fs_clean = 0; 200 vn_finished_write(mp); 201 return (error); 202 } 203 vn_finished_write(mp); 204 DROP_GIANT(); 205 g_topology_lock(); 206 g_access(ump->um_cp, 0, -1, 0); 207 g_topology_unlock(); 208 PICKUP_GIANT(); 209 fs->fs_ronly = 1; 210 mp->mnt_flag |= MNT_RDONLY; 211 } 212 if ((mp->mnt_flag & MNT_RELOAD) && 213 (error = ffs_reload(mp, td)) != 0) 214 return (error); 215 if (fs->fs_ronly && 216 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 217 /* 218 * If upgrade to read-write by non-root, then verify 219 * that user has necessary permissions on the device. 220 */ 221 if (suser(td)) { 222 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 223 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 224 td->td_ucred, td)) != 0) { 225 VOP_UNLOCK(devvp, 0, td); 226 return (error); 227 } 228 VOP_UNLOCK(devvp, 0, td); 229 } 230 fs->fs_flags &= ~FS_UNCLEAN; 231 if (fs->fs_clean == 0) { 232 fs->fs_flags |= FS_UNCLEAN; 233 if ((mp->mnt_flag & MNT_FORCE) || 234 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 235 (fs->fs_flags & FS_DOSOFTDEP))) { 236 printf("WARNING: %s was not %s\n", 237 fs->fs_fsmnt, "properly dismounted"); 238 } else { 239 printf( 240"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 241 fs->fs_fsmnt); 242 return (EPERM); 243 } 244 } 245 DROP_GIANT(); 246 g_topology_lock(); 247 /* 248 * If we're the root device, we may not have an E count 249 * yet, get it now. 250 */ 251 if (ump->um_cp->ace == 0) 252 error = g_access(ump->um_cp, 0, 1, 1); 253 else 254 error = g_access(ump->um_cp, 0, 1, 0); 255 g_topology_unlock(); 256 PICKUP_GIANT(); 257 if (error) 258 return (error); 259 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) 260 return (error); 261 fs->fs_ronly = 0; 262 mp->mnt_flag &= ~MNT_RDONLY; 263 fs->fs_clean = 0; 264 if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { 265 vn_finished_write(mp); 266 return (error); 267 } 268 /* check to see if we need to start softdep */ 269 if ((fs->fs_flags & FS_DOSOFTDEP) && 270 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ 271 vn_finished_write(mp); 272 return (error); 273 } 274 if (fs->fs_snapinum[0] != 0) 275 ffs_snapshot_mount(mp); 276 vn_finished_write(mp); 277 } 278 /* 279 * Soft updates is incompatible with "async", 280 * so if we are doing softupdates stop the user 281 * from setting the async flag in an update. 282 * Softdep_mount() clears it in an initial mount 283 * or ro->rw remount. 284 */ 285 if (mp->mnt_flag & MNT_SOFTDEP) 286 mp->mnt_flag &= ~MNT_ASYNC; 287 /* 288 * Keep MNT_ACLS flag if it is stored in superblock. 289 */ 290 if ((fs->fs_flags & FS_ACLS) != 0) 291 mp->mnt_flag |= MNT_ACLS; 292 /* 293 * If not updating name, process export requests. 294 */ 295 error = vfs_copyopt(mp->mnt_optnew, "export", &export, sizeof export); 296 if (error == 0 && export.ex_flags != 0) 297 return (vfs_export(mp, &export)); 298 /* 299 * If this is a snapshot request, take the snapshot. 300 */ 301 if (mp->mnt_flag & MNT_SNAPSHOT) 302 return (ffs_snapshot(mp, fspec)); 303 } 304 305 /* 306 * Not an update, or updating the name: look up the name 307 * and verify that it refers to a sensible disk device. 308 */ 309 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 310 if ((error = namei(&ndp)) != 0) 311 return (error); 312 NDFREE(&ndp, NDF_ONLY_PNBUF); 313 devvp = ndp.ni_vp; 314 if (!vn_isdisk(devvp, &error)) { 315 vrele(devvp); 316 return (error); 317 } 318 319 /* 320 * If mount by non-root, then verify that user has necessary 321 * permissions on the device. 322 */ 323 if (suser(td)) { 324 accessmode = VREAD; 325 if ((mp->mnt_flag & MNT_RDONLY) == 0) 326 accessmode |= VWRITE; 327 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 328 if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){ 329 vput(devvp); 330 return (error); 331 } 332 VOP_UNLOCK(devvp, 0, td); 333 } 334 335 if (mp->mnt_flag & MNT_UPDATE) { 336 /* 337 * Update only 338 * 339 * If it's not the same vnode, or at least the same device 340 * then it's not correct. 341 */ 342 343 if (devvp->v_rdev != ump->um_devvp->v_rdev) 344 error = EINVAL; /* needs translation */ 345 vrele(devvp); 346 if (error) 347 return (error); 348 } else { 349 /* 350 * New mount 351 * 352 * We need the name for the mount point (also used for 353 * "last mounted on") copied in. If an error occurs, 354 * the mount point is discarded by the upper level code. 355 * Note that vfs_mount() populates f_mntonname for us. 356 */ 357 if ((error = ffs_mountfs(devvp, mp, td)) != 0) { 358 vrele(devvp); 359 return (error); 360 } 361 } 362 vfs_mountedfrom(mp, fspec); 363 return (0); 364} 365 366/* 367 * Compatibility with old mount system call. 368 */ 369 370static int 371ffs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 372{ 373 struct ufs_args args; 374 int error; 375 376 if (data == NULL) 377 return (EINVAL); 378 error = copyin(data, &args, sizeof args); 379 if (error) 380 return (error); 381 382 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 383 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 384 error = kernel_mount(ma, flags); 385 386 return (error); 387} 388 389/* 390 * Reload all incore data for a filesystem (used after running fsck on 391 * the root filesystem and finding things to fix). The filesystem must 392 * be mounted read-only. 393 * 394 * Things to do to update the mount: 395 * 1) invalidate all cached meta-data. 396 * 2) re-read superblock from disk. 397 * 3) re-read summary information from disk. 398 * 4) invalidate all inactive vnodes. 399 * 5) invalidate all cached file data. 400 * 6) re-read inode data for all active vnodes. 401 */ 402static int 403ffs_reload(struct mount *mp, struct thread *td) 404{ 405 struct vnode *vp, *nvp, *devvp; 406 struct inode *ip; 407 void *space; 408 struct buf *bp; 409 struct fs *fs, *newfs; 410 struct ufsmount *ump; 411 ufs2_daddr_t sblockloc; 412 int i, blks, size, error; 413 int32_t *lp; 414 415 if ((mp->mnt_flag & MNT_RDONLY) == 0) 416 return (EINVAL); 417 ump = VFSTOUFS(mp); 418 /* 419 * Step 1: invalidate all cached meta-data. 420 */ 421 devvp = VFSTOUFS(mp)->um_devvp; 422 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 423 if (vinvalbuf(devvp, 0, td, 0, 0) != 0) 424 panic("ffs_reload: dirty1"); 425 VOP_UNLOCK(devvp, 0, td); 426 427 /* 428 * Step 2: re-read superblock from disk. 429 */ 430 fs = VFSTOUFS(mp)->um_fs; 431 if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, 432 NOCRED, &bp)) != 0) 433 return (error); 434 newfs = (struct fs *)bp->b_data; 435 if ((newfs->fs_magic != FS_UFS1_MAGIC && 436 newfs->fs_magic != FS_UFS2_MAGIC) || 437 newfs->fs_bsize > MAXBSIZE || 438 newfs->fs_bsize < sizeof(struct fs)) { 439 brelse(bp); 440 return (EIO); /* XXX needs translation */ 441 } 442 /* 443 * Copy pointer fields back into superblock before copying in XXX 444 * new superblock. These should really be in the ufsmount. XXX 445 * Note that important parameters (eg fs_ncg) are unchanged. 446 */ 447 newfs->fs_csp = fs->fs_csp; 448 newfs->fs_maxcluster = fs->fs_maxcluster; 449 newfs->fs_contigdirs = fs->fs_contigdirs; 450 newfs->fs_active = fs->fs_active; 451 /* The file system is still read-only. */ 452 newfs->fs_ronly = 1; 453 sblockloc = fs->fs_sblockloc; 454 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 455 brelse(bp); 456 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 457 ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); 458 UFS_LOCK(ump); 459 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 460 printf("%s: reload pending error: blocks %jd files %d\n", 461 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 462 fs->fs_pendinginodes); 463 fs->fs_pendingblocks = 0; 464 fs->fs_pendinginodes = 0; 465 } 466 UFS_UNLOCK(ump); 467 468 /* 469 * Step 3: re-read summary information from disk. 470 */ 471 blks = howmany(fs->fs_cssize, fs->fs_fsize); 472 space = fs->fs_csp; 473 for (i = 0; i < blks; i += fs->fs_frag) { 474 size = fs->fs_bsize; 475 if (i + fs->fs_frag > blks) 476 size = (blks - i) * fs->fs_fsize; 477 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 478 NOCRED, &bp); 479 if (error) 480 return (error); 481 bcopy(bp->b_data, space, (u_int)size); 482 space = (char *)space + size; 483 brelse(bp); 484 } 485 /* 486 * We no longer know anything about clusters per cylinder group. 487 */ 488 if (fs->fs_contigsumsize > 0) { 489 lp = fs->fs_maxcluster; 490 for (i = 0; i < fs->fs_ncg; i++) 491 *lp++ = fs->fs_contigsumsize; 492 } 493 494loop: 495 MNT_ILOCK(mp); 496 MNT_VNODE_FOREACH(vp, mp, nvp) { 497 VI_LOCK(vp); 498 if (vp->v_iflag & VI_DOOMED) { 499 VI_UNLOCK(vp); 500 continue; 501 } 502 MNT_IUNLOCK(mp); 503 /* 504 * Step 4: invalidate all cached file data. 505 */ 506 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 507 goto loop; 508 } 509 if (vinvalbuf(vp, 0, td, 0, 0)) 510 panic("ffs_reload: dirty2"); 511 /* 512 * Step 5: re-read inode data for all active vnodes. 513 */ 514 ip = VTOI(vp); 515 error = 516 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 517 (int)fs->fs_bsize, NOCRED, &bp); 518 if (error) { 519 VOP_UNLOCK(vp, 0, td); 520 vrele(vp); 521 return (error); 522 } 523 ffs_load_inode(bp, ip, fs, ip->i_number); 524 ip->i_effnlink = ip->i_nlink; 525 brelse(bp); 526 VOP_UNLOCK(vp, 0, td); 527 vrele(vp); 528 MNT_ILOCK(mp); 529 } 530 MNT_IUNLOCK(mp); 531 return (0); 532} 533 534/* 535 * Possible superblock locations ordered from most to least likely. 536 */ 537static int sblock_try[] = SBLOCKSEARCH; 538 539/* 540 * Common code for mount and mountroot 541 */ 542static int 543ffs_mountfs(devvp, mp, td) 544 struct vnode *devvp; 545 struct mount *mp; 546 struct thread *td; 547{ 548 struct ufsmount *ump; 549 struct buf *bp; 550 struct fs *fs; 551 struct cdev *dev; 552 void *space; 553 ufs2_daddr_t sblockloc; 554 int error, i, blks, size, ronly; 555 int32_t *lp; 556 struct ucred *cred; 557 struct g_consumer *cp; 558 559 dev = devvp->v_rdev; 560 cred = td ? td->td_ucred : NOCRED; 561 562 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 563 DROP_GIANT(); 564 g_topology_lock(); 565 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); 566 567 /* 568 * If we are a root mount, drop the E flag so fsck can do its magic. 569 * We will pick it up again when we remount R/W. 570 */ 571 if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS)) 572 error = g_access(cp, 0, 0, -1); 573 g_topology_unlock(); 574 PICKUP_GIANT(); 575 VOP_UNLOCK(devvp, 0, td); 576 if (error) 577 return (error); 578 if (devvp->v_rdev->si_iosize_max != 0) 579 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 580 if (mp->mnt_iosize_max > MAXPHYS) 581 mp->mnt_iosize_max = MAXPHYS; 582 583 devvp->v_bufobj.bo_private = cp; 584 devvp->v_bufobj.bo_ops = &ffs_ops; 585 586 bp = NULL; 587 ump = NULL; 588 fs = NULL; 589 sblockloc = 0; 590 /* 591 * Try reading the superblock in each of its possible locations. 592 */ 593 for (i = 0; sblock_try[i] != -1; i++) { 594 if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, 595 cred, &bp)) != 0) 596 goto out; 597 fs = (struct fs *)bp->b_data; 598 sblockloc = sblock_try[i]; 599 if ((fs->fs_magic == FS_UFS1_MAGIC || 600 (fs->fs_magic == FS_UFS2_MAGIC && 601 (fs->fs_sblockloc == sblockloc || 602 (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) && 603 fs->fs_bsize <= MAXBSIZE && 604 fs->fs_bsize >= sizeof(struct fs)) 605 break; 606 brelse(bp); 607 bp = NULL; 608 } 609 if (sblock_try[i] == -1) { 610 error = EINVAL; /* XXX needs translation */ 611 goto out; 612 } 613 fs->fs_fmod = 0; 614 fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */ 615 fs->fs_flags &= ~FS_UNCLEAN; 616 if (fs->fs_clean == 0) { 617 fs->fs_flags |= FS_UNCLEAN; 618 if (ronly || (mp->mnt_flag & MNT_FORCE) || 619 ((fs->fs_flags & FS_NEEDSFSCK) == 0 && 620 (fs->fs_flags & FS_DOSOFTDEP))) { 621 printf( 622"WARNING: %s was not properly dismounted\n", 623 fs->fs_fsmnt); 624 } else { 625 printf( 626"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 627 fs->fs_fsmnt); 628 error = EPERM; 629 goto out; 630 } 631 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && 632 (mp->mnt_flag & MNT_FORCE)) { 633 printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt, 634 (intmax_t)fs->fs_pendingblocks, 635 fs->fs_pendinginodes); 636 fs->fs_pendingblocks = 0; 637 fs->fs_pendinginodes = 0; 638 } 639 } 640 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 641 printf("%s: mount pending error: blocks %jd files %d\n", 642 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 643 fs->fs_pendinginodes); 644 fs->fs_pendingblocks = 0; 645 fs->fs_pendinginodes = 0; 646 } 647 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 648 ump->um_cp = cp; 649 ump->um_bo = &devvp->v_bufobj; 650 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 651 if (fs->fs_magic == FS_UFS1_MAGIC) { 652 ump->um_fstype = UFS1; 653 ump->um_balloc = ffs_balloc_ufs1; 654 } else { 655 ump->um_fstype = UFS2; 656 ump->um_balloc = ffs_balloc_ufs2; 657 } 658 ump->um_blkatoff = ffs_blkatoff; 659 ump->um_truncate = ffs_truncate; 660 ump->um_update = ffs_update; 661 ump->um_valloc = ffs_valloc; 662 ump->um_vfree = ffs_vfree; 663 ump->um_ifree = ffs_ifree; 664 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); 665 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 666 if (fs->fs_sbsize < SBLOCKSIZE) 667 bp->b_flags |= B_INVAL | B_NOCACHE; 668 brelse(bp); 669 bp = NULL; 670 fs = ump->um_fs; 671 ffs_oldfscompat_read(fs, ump, sblockloc); 672 fs->fs_ronly = ronly; 673 size = fs->fs_cssize; 674 blks = howmany(size, fs->fs_fsize); 675 if (fs->fs_contigsumsize > 0) 676 size += fs->fs_ncg * sizeof(int32_t); 677 size += fs->fs_ncg * sizeof(u_int8_t); 678 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 679 fs->fs_csp = space; 680 for (i = 0; i < blks; i += fs->fs_frag) { 681 size = fs->fs_bsize; 682 if (i + fs->fs_frag > blks) 683 size = (blks - i) * fs->fs_fsize; 684 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 685 cred, &bp)) != 0) { 686 free(fs->fs_csp, M_UFSMNT); 687 goto out; 688 } 689 bcopy(bp->b_data, space, (u_int)size); 690 space = (char *)space + size; 691 brelse(bp); 692 bp = NULL; 693 } 694 if (fs->fs_contigsumsize > 0) { 695 fs->fs_maxcluster = lp = space; 696 for (i = 0; i < fs->fs_ncg; i++) 697 *lp++ = fs->fs_contigsumsize; 698 space = lp; 699 } 700 size = fs->fs_ncg * sizeof(u_int8_t); 701 fs->fs_contigdirs = (u_int8_t *)space; 702 bzero(fs->fs_contigdirs, size); 703 fs->fs_active = NULL; 704 mp->mnt_data = (qaddr_t)ump; 705 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 706 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 707 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 708 vfs_getvfs(&mp->mnt_stat.f_fsid)) 709 vfs_getnewfsid(mp); 710 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 711 mp->mnt_flag |= MNT_LOCAL; 712 if ((fs->fs_flags & FS_MULTILABEL) != 0) 713#ifdef MAC 714 mp->mnt_flag |= MNT_MULTILABEL; 715#else 716 printf( 717"WARNING: %s: multilabel flag on fs but no MAC support\n", 718 fs->fs_fsmnt); 719#endif 720 if ((fs->fs_flags & FS_ACLS) != 0) 721#ifdef UFS_ACL 722 mp->mnt_flag |= MNT_ACLS; 723#else 724 printf( 725"WARNING: %s: ACLs flag on fs but no ACLs support\n", 726 fs->fs_fsmnt); 727#endif 728 ump->um_mountp = mp; 729 ump->um_dev = dev; 730 ump->um_devvp = devvp; 731 ump->um_nindir = fs->fs_nindir; 732 ump->um_bptrtodb = fs->fs_fsbtodb; 733 ump->um_seqinc = fs->fs_frag; 734 for (i = 0; i < MAXQUOTAS; i++) 735 ump->um_quotas[i] = NULLVP; 736#ifdef UFS_EXTATTR 737 ufs_extattr_uepm_init(&ump->um_extattr); 738#endif 739 /* 740 * Set FS local "last mounted on" information (NULL pad) 741 */ 742 vfs_mountedfrom(mp, fs->fs_fsmnt); 743 744 if( mp->mnt_flag & MNT_ROOTFS) { 745 /* 746 * Root mount; update timestamp in mount structure. 747 * this will be used by the common root mount code 748 * to update the system clock. 749 */ 750 mp->mnt_time = fs->fs_time; 751 } 752 753 if (ronly == 0) { 754 if ((fs->fs_flags & FS_DOSOFTDEP) && 755 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 756 free(fs->fs_csp, M_UFSMNT); 757 goto out; 758 } 759 if (fs->fs_snapinum[0] != 0) 760 ffs_snapshot_mount(mp); 761 fs->fs_fmod = 1; 762 fs->fs_clean = 0; 763 (void) ffs_sbupdate(ump, MNT_WAIT); 764 } 765 /* 766 * Initialize filesystem stat information in mount struct. 767 */ 768#ifdef UFS_EXTATTR 769#ifdef UFS_EXTATTR_AUTOSTART 770 /* 771 * 772 * Auto-starting does the following: 773 * - check for /.attribute in the fs, and extattr_start if so 774 * - for each file in .attribute, enable that file with 775 * an attribute of the same name. 776 * Not clear how to report errors -- probably eat them. 777 * This would all happen while the filesystem was busy/not 778 * available, so would effectively be "atomic". 779 */ 780 (void) ufs_extattr_autostart(mp, td); 781#endif /* !UFS_EXTATTR_AUTOSTART */ 782#endif /* !UFS_EXTATTR */ 783#ifndef QUOTA 784 mp->mnt_kern_flag |= MNTK_MPSAFE; 785#endif 786 return (0); 787out: 788 if (bp) 789 brelse(bp); 790 if (cp != NULL) { 791 DROP_GIANT(); 792 g_topology_lock(); 793 g_vfs_close(cp, td); 794 g_topology_unlock(); 795 PICKUP_GIANT(); 796 } 797 if (ump) { 798 mtx_destroy(UFS_MTX(ump)); 799 free(ump->um_fs, M_UFSMNT); 800 free(ump, M_UFSMNT); 801 mp->mnt_data = (qaddr_t)0; 802 } 803 return (error); 804} 805 806#include <sys/sysctl.h> 807static int bigcgs = 0; 808SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); 809 810/* 811 * Sanity checks for loading old filesystem superblocks. 812 * See ffs_oldfscompat_write below for unwound actions. 813 * 814 * XXX - Parts get retired eventually. 815 * Unfortunately new bits get added. 816 */ 817static void 818ffs_oldfscompat_read(fs, ump, sblockloc) 819 struct fs *fs; 820 struct ufsmount *ump; 821 ufs2_daddr_t sblockloc; 822{ 823 off_t maxfilesize; 824 825 /* 826 * If not yet done, update fs_flags location and value of fs_sblockloc. 827 */ 828 if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 829 fs->fs_flags = fs->fs_old_flags; 830 fs->fs_old_flags |= FS_FLAGS_UPDATED; 831 fs->fs_sblockloc = sblockloc; 832 } 833 /* 834 * If not yet done, update UFS1 superblock with new wider fields. 835 */ 836 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { 837 fs->fs_maxbsize = fs->fs_bsize; 838 fs->fs_time = fs->fs_old_time; 839 fs->fs_size = fs->fs_old_size; 840 fs->fs_dsize = fs->fs_old_dsize; 841 fs->fs_csaddr = fs->fs_old_csaddr; 842 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 843 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 844 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 845 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 846 } 847 if (fs->fs_magic == FS_UFS1_MAGIC && 848 fs->fs_old_inodefmt < FS_44INODEFMT) { 849 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 850 fs->fs_qbmask = ~fs->fs_bmask; 851 fs->fs_qfmask = ~fs->fs_fmask; 852 } 853 if (fs->fs_magic == FS_UFS1_MAGIC) { 854 ump->um_savedmaxfilesize = fs->fs_maxfilesize; 855 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; 856 if (fs->fs_maxfilesize > maxfilesize) 857 fs->fs_maxfilesize = maxfilesize; 858 } 859 /* Compatibility for old filesystems */ 860 if (fs->fs_avgfilesize <= 0) 861 fs->fs_avgfilesize = AVFILESIZ; 862 if (fs->fs_avgfpdir <= 0) 863 fs->fs_avgfpdir = AFPDIR; 864 if (bigcgs) { 865 fs->fs_save_cgsize = fs->fs_cgsize; 866 fs->fs_cgsize = fs->fs_bsize; 867 } 868} 869 870/* 871 * Unwinding superblock updates for old filesystems. 872 * See ffs_oldfscompat_read above for details. 873 * 874 * XXX - Parts get retired eventually. 875 * Unfortunately new bits get added. 876 */ 877static void 878ffs_oldfscompat_write(fs, ump) 879 struct fs *fs; 880 struct ufsmount *ump; 881{ 882 883 /* 884 * Copy back UFS2 updated fields that UFS1 inspects. 885 */ 886 if (fs->fs_magic == FS_UFS1_MAGIC) { 887 fs->fs_old_time = fs->fs_time; 888 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 889 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 890 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 891 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 892 fs->fs_maxfilesize = ump->um_savedmaxfilesize; 893 } 894 if (bigcgs) { 895 fs->fs_cgsize = fs->fs_save_cgsize; 896 fs->fs_save_cgsize = 0; 897 } 898} 899 900/* 901 * unmount system call 902 */ 903static int 904ffs_unmount(mp, mntflags, td) 905 struct mount *mp; 906 int mntflags; 907 struct thread *td; 908{ 909 struct ufsmount *ump = VFSTOUFS(mp); 910 struct fs *fs; 911 int error, flags; 912 913 flags = 0; 914 if (mntflags & MNT_FORCE) { 915 flags |= FORCECLOSE; 916 } 917#ifdef UFS_EXTATTR 918 if ((error = ufs_extattr_stop(mp, td))) { 919 if (error != EOPNOTSUPP) 920 printf("ffs_unmount: ufs_extattr_stop returned %d\n", 921 error); 922 } else { 923 ufs_extattr_uepm_destroy(&ump->um_extattr); 924 } 925#endif 926 if (mp->mnt_flag & MNT_SOFTDEP) { 927 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 928 return (error); 929 } else { 930 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 931 return (error); 932 } 933 fs = ump->um_fs; 934 UFS_LOCK(ump); 935 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 936 printf("%s: unmount pending error: blocks %jd files %d\n", 937 fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, 938 fs->fs_pendinginodes); 939 fs->fs_pendingblocks = 0; 940 fs->fs_pendinginodes = 0; 941 } 942 UFS_UNLOCK(ump); 943 if (fs->fs_ronly == 0) { 944 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; 945 error = ffs_sbupdate(ump, MNT_WAIT); 946 if (error) { 947 fs->fs_clean = 0; 948 return (error); 949 } 950 } 951 DROP_GIANT(); 952 g_topology_lock(); 953 g_vfs_close(ump->um_cp, td); 954 g_topology_unlock(); 955 PICKUP_GIANT(); 956 vrele(ump->um_devvp); 957 mtx_destroy(UFS_MTX(ump)); 958 free(fs->fs_csp, M_UFSMNT); 959 free(fs, M_UFSMNT); 960 free(ump, M_UFSMNT); 961 mp->mnt_data = (qaddr_t)0; 962 mp->mnt_flag &= ~MNT_LOCAL; 963 return (error); 964} 965 966/* 967 * Flush out all the files in a filesystem. 968 */ 969int 970ffs_flushfiles(mp, flags, td) 971 struct mount *mp; 972 int flags; 973 struct thread *td; 974{ 975 struct ufsmount *ump; 976 int error; 977 978 ump = VFSTOUFS(mp); 979#ifdef QUOTA 980 if (mp->mnt_flag & MNT_QUOTA) { 981 int i; 982 error = vflush(mp, 0, SKIPSYSTEM|flags, td); 983 if (error) 984 return (error); 985 for (i = 0; i < MAXQUOTAS; i++) { 986 if (ump->um_quotas[i] == NULLVP) 987 continue; 988 quotaoff(td, mp, i); 989 } 990 /* 991 * Here we fall through to vflush again to ensure 992 * that we have gotten rid of all the system vnodes. 993 */ 994 } 995#endif 996 ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles"); 997 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { 998 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) 999 return (error); 1000 ffs_snapshot_unmount(mp); 1001 /* 1002 * Here we fall through to vflush again to ensure 1003 * that we have gotten rid of all the system vnodes. 1004 */ 1005 } 1006 /* 1007 * Flush all the files. 1008 */ 1009 if ((error = vflush(mp, 0, flags, td)) != 0) 1010 return (error); 1011 /* 1012 * Flush filesystem metadata. 1013 */ 1014 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1015 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 1016 VOP_UNLOCK(ump->um_devvp, 0, td); 1017 return (error); 1018} 1019 1020/* 1021 * Get filesystem statistics. 1022 */ 1023static int 1024ffs_statfs(mp, sbp, td) 1025 struct mount *mp; 1026 struct statfs *sbp; 1027 struct thread *td; 1028{ 1029 struct ufsmount *ump; 1030 struct fs *fs; 1031 1032 ump = VFSTOUFS(mp); 1033 fs = ump->um_fs; 1034 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) 1035 panic("ffs_statfs"); 1036 sbp->f_version = STATFS_VERSION; 1037 sbp->f_bsize = fs->fs_fsize; 1038 sbp->f_iosize = fs->fs_bsize; 1039 sbp->f_blocks = fs->fs_dsize; 1040 UFS_LOCK(ump); 1041 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 1042 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1043 sbp->f_bavail = freespace(fs, fs->fs_minfree) + 1044 dbtofsb(fs, fs->fs_pendingblocks); 1045 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1046 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1047 UFS_UNLOCK(ump); 1048 sbp->f_namemax = NAME_MAX; 1049 return (0); 1050} 1051 1052/* 1053 * Go through the disk queues to initiate sandbagged IO; 1054 * go through the inodes to write those that have been modified; 1055 * initiate the writing of the super block if it has been modified. 1056 * 1057 * Note: we are always called with the filesystem marked `MPBUSY'. 1058 */ 1059static int 1060ffs_sync(mp, waitfor, td) 1061 struct mount *mp; 1062 int waitfor; 1063 struct thread *td; 1064{ 1065 struct vnode *nvp, *vp, *devvp; 1066 struct inode *ip; 1067 struct ufsmount *ump = VFSTOUFS(mp); 1068 struct fs *fs; 1069 int error, count, wait, lockreq, allerror = 0; 1070 struct bufobj *bo; 1071 1072 fs = ump->um_fs; 1073 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1074 printf("fs = %s\n", fs->fs_fsmnt); 1075 panic("ffs_sync: rofs mod"); 1076 } 1077 /* 1078 * Write back each (modified) inode. 1079 */ 1080 wait = 0; 1081 lockreq = LK_EXCLUSIVE | LK_NOWAIT; 1082 if (waitfor == MNT_WAIT) { 1083 wait = 1; 1084 lockreq = LK_EXCLUSIVE; 1085 } 1086 lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; 1087 MNT_ILOCK(mp); 1088loop: 1089 MNT_VNODE_FOREACH(vp, mp, nvp) { 1090 /* 1091 * Depend on the mntvnode_slock to keep things stable enough 1092 * for a quick test. Since there might be hundreds of 1093 * thousands of vnodes, we cannot afford even a subroutine 1094 * call unless there's a good chance that we have work to do. 1095 */ 1096 VI_LOCK(vp); 1097 if (vp->v_iflag & VI_DOOMED) { 1098 VI_UNLOCK(vp); 1099 continue; 1100 } 1101 ip = VTOI(vp); 1102 if (vp->v_type == VNON || ((ip->i_flag & 1103 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1104 vp->v_bufobj.bo_dirty.bv_cnt == 0)) { 1105 VI_UNLOCK(vp); 1106 continue; 1107 } 1108 MNT_IUNLOCK(mp); 1109 if ((error = vget(vp, lockreq, td)) != 0) { 1110 MNT_ILOCK(mp); 1111 if (error == ENOENT || error == ENOLCK) 1112 goto loop; 1113 continue; 1114 } 1115 if ((error = ffs_syncvnode(vp, waitfor)) != 0) 1116 allerror = error; 1117 vput(vp); 1118 MNT_ILOCK(mp); 1119 } 1120 MNT_IUNLOCK(mp); 1121 /* 1122 * Force stale filesystem control information to be flushed. 1123 */ 1124 if (waitfor == MNT_WAIT) { 1125 if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) 1126 allerror = error; 1127 /* Flushed work items may create new vnodes to clean */ 1128 if (allerror == 0 && count) { 1129 MNT_ILOCK(mp); 1130 goto loop; 1131 } 1132 } 1133#ifdef QUOTA 1134 qsync(mp); 1135#endif 1136 devvp = ump->um_devvp; 1137 VI_LOCK(devvp); 1138 bo = &devvp->v_bufobj; 1139 if (waitfor != MNT_LAZY && 1140 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { 1141 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td); 1142 if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0) 1143 allerror = error; 1144 VOP_UNLOCK(devvp, 0, td); 1145 if (allerror == 0 && waitfor == MNT_WAIT) { 1146 MNT_ILOCK(mp); 1147 goto loop; 1148 } 1149 } else 1150 VI_UNLOCK(devvp); 1151 /* 1152 * Write back modified superblock. 1153 */ 1154 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1155 allerror = error; 1156 return (allerror); 1157} 1158 1159int 1160ffs_vget(mp, ino, flags, vpp) 1161 struct mount *mp; 1162 ino_t ino; 1163 int flags; 1164 struct vnode **vpp; 1165{ 1166 struct fs *fs; 1167 struct inode *ip; 1168 struct ufsmount *ump; 1169 struct buf *bp; 1170 struct vnode *vp; 1171 struct cdev *dev; 1172 int error; 1173 1174 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 1175 if (error || *vpp != NULL) 1176 return (error); 1177 1178 /* 1179 * We must promote to an exclusive lock for vnode creation. This 1180 * can happen if lookup is passed LOCKSHARED. 1181 */ 1182 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 1183 flags &= ~LK_TYPE_MASK; 1184 flags |= LK_EXCLUSIVE; 1185 } 1186 1187 /* 1188 * We do not lock vnode creation as it is believed to be too 1189 * expensive for such rare case as simultaneous creation of vnode 1190 * for same ino by different processes. We just allow them to race 1191 * and check later to decide who wins. Let the race begin! 1192 */ 1193 1194 ump = VFSTOUFS(mp); 1195 dev = ump->um_dev; 1196 fs = ump->um_fs; 1197 1198 /* 1199 * If this MALLOC() is performed after the getnewvnode() 1200 * it might block, leaving a vnode with a NULL v_data to be 1201 * found by ffs_sync() if a sync happens to fire right then, 1202 * which will cause a panic because ffs_sync() blindly 1203 * dereferences vp->v_data (as well it should). 1204 */ 1205 ip = uma_zalloc(uma_inode, M_WAITOK | M_ZERO); 1206 1207 /* Allocate a new vnode/inode. */ 1208 if (fs->fs_magic == FS_UFS1_MAGIC) 1209 error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp); 1210 else 1211 error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp); 1212 if (error) { 1213 *vpp = NULL; 1214 uma_zfree(uma_inode, ip); 1215 return (error); 1216 } 1217 /* 1218 * FFS supports recursive and shared locking. 1219 */ 1220 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 1221 vp->v_vnlock->lk_flags &= ~LK_NOSHARE; 1222 vp->v_data = ip; 1223 vp->v_bufobj.bo_bsize = fs->fs_bsize; 1224 ip->i_vnode = vp; 1225 ip->i_ump = ump; 1226 ip->i_fs = fs; 1227 ip->i_dev = dev; 1228 ip->i_number = ino; 1229#ifdef QUOTA 1230 { 1231 int i; 1232 for (i = 0; i < MAXQUOTAS; i++) 1233 ip->i_dquot[i] = NODQUOT; 1234 } 1235#endif 1236 1237 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 1238 if (error || *vpp != NULL) 1239 return (error); 1240 1241 /* Read in the disk contents for the inode, copy into the inode. */ 1242 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1243 (int)fs->fs_bsize, NOCRED, &bp); 1244 if (error) { 1245 /* 1246 * The inode does not contain anything useful, so it would 1247 * be misleading to leave it on its hash chain. With mode 1248 * still zero, it will be unlinked and returned to the free 1249 * list by vput(). 1250 */ 1251 brelse(bp); 1252 vput(vp); 1253 *vpp = NULL; 1254 return (error); 1255 } 1256 if (ip->i_ump->um_fstype == UFS1) 1257 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); 1258 else 1259 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); 1260 ffs_load_inode(bp, ip, fs, ino); 1261 if (DOINGSOFTDEP(vp)) 1262 softdep_load_inodeblock(ip); 1263 else 1264 ip->i_effnlink = ip->i_nlink; 1265 bqrelse(bp); 1266 1267 /* 1268 * Initialize the vnode from the inode, check for aliases. 1269 * Note that the underlying vnode may have changed. 1270 */ 1271 if (ip->i_ump->um_fstype == UFS1) 1272 error = ufs_vinit(mp, &ffs_fifoops1, &vp); 1273 else 1274 error = ufs_vinit(mp, &ffs_fifoops2, &vp); 1275 if (error) { 1276 vput(vp); 1277 *vpp = NULL; 1278 return (error); 1279 } 1280 1281 /* 1282 * Finish inode initialization. 1283 */ 1284 1285 /* 1286 * Set up a generation number for this inode if it does not 1287 * already have one. This should only happen on old filesystems. 1288 */ 1289 if (ip->i_gen == 0) { 1290 ip->i_gen = arc4random() / 2 + 1; 1291 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 1292 ip->i_flag |= IN_MODIFIED; 1293 DIP_SET(ip, i_gen, ip->i_gen); 1294 } 1295 } 1296 /* 1297 * Ensure that uid and gid are correct. This is a temporary 1298 * fix until fsck has been changed to do the update. 1299 */ 1300 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */ 1301 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1302 ip->i_uid = ip->i_din1->di_ouid; /* XXX */ 1303 ip->i_gid = ip->i_din1->di_ogid; /* XXX */ 1304 } /* XXX */ 1305 1306#ifdef MAC 1307 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { 1308 /* 1309 * If this vnode is already allocated, and we're running 1310 * multi-label, attempt to perform a label association 1311 * from the extended attributes on the inode. 1312 */ 1313 error = mac_associate_vnode_extattr(mp, vp); 1314 if (error) { 1315 /* ufs_inactive will release ip->i_devvp ref. */ 1316 vput(vp); 1317 *vpp = NULL; 1318 return (error); 1319 } 1320 } 1321#endif 1322 1323 *vpp = vp; 1324 return (0); 1325} 1326 1327/* 1328 * File handle to vnode 1329 * 1330 * Have to be really careful about stale file handles: 1331 * - check that the inode number is valid 1332 * - call ffs_vget() to get the locked inode 1333 * - check for an unallocated inode (i_mode == 0) 1334 * - check that the given client host has export rights and return 1335 * those rights via. exflagsp and credanonp 1336 */ 1337static int 1338ffs_fhtovp(mp, fhp, vpp) 1339 struct mount *mp; 1340 struct fid *fhp; 1341 struct vnode **vpp; 1342{ 1343 struct ufid *ufhp; 1344 struct fs *fs; 1345 1346 ufhp = (struct ufid *)fhp; 1347 fs = VFSTOUFS(mp)->um_fs; 1348 if (ufhp->ufid_ino < ROOTINO || 1349 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1350 return (ESTALE); 1351 return (ufs_fhtovp(mp, ufhp, vpp)); 1352} 1353 1354/* 1355 * Vnode pointer to File handle 1356 */ 1357/* ARGSUSED */ 1358static int 1359ffs_vptofh(vp, fhp) 1360 struct vnode *vp; 1361 struct fid *fhp; 1362{ 1363 struct inode *ip; 1364 struct ufid *ufhp; 1365 1366 ip = VTOI(vp); 1367 ufhp = (struct ufid *)fhp; 1368 ufhp->ufid_len = sizeof(struct ufid); 1369 ufhp->ufid_ino = ip->i_number; 1370 ufhp->ufid_gen = ip->i_gen; 1371 return (0); 1372} 1373 1374/* 1375 * Initialize the filesystem. 1376 */ 1377static int 1378ffs_init(vfsp) 1379 struct vfsconf *vfsp; 1380{ 1381 1382 softdep_initialize(); 1383 return (ufs_init(vfsp)); 1384} 1385 1386/* 1387 * Undo the work of ffs_init(). 1388 */ 1389static int 1390ffs_uninit(vfsp) 1391 struct vfsconf *vfsp; 1392{ 1393 int ret; 1394 1395 ret = ufs_uninit(vfsp); 1396 softdep_uninitialize(); 1397 return (ret); 1398} 1399 1400/* 1401 * Write a superblock and associated information back to disk. 1402 */ 1403static int 1404ffs_sbupdate(mp, waitfor) 1405 struct ufsmount *mp; 1406 int waitfor; 1407{ 1408 struct fs *fs = mp->um_fs; 1409 struct buf *sbbp; 1410 struct buf *bp; 1411 int blks; 1412 void *space; 1413 int i, size, error, allerror = 0; 1414 1415 if (fs->fs_ronly == 1 && 1416 (mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != 1417 (MNT_RDONLY | MNT_UPDATE)) 1418 panic("ffs_sbupdate: write read-only filesystem"); 1419 /* 1420 * We use the superblock's buf to serialize calls to ffs_sbupdate(). 1421 */ 1422 sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 1423 0, 0, 0); 1424 /* 1425 * First write back the summary information. 1426 */ 1427 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1428 space = fs->fs_csp; 1429 for (i = 0; i < blks; i += fs->fs_frag) { 1430 size = fs->fs_bsize; 1431 if (i + fs->fs_frag > blks) 1432 size = (blks - i) * fs->fs_fsize; 1433 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1434 size, 0, 0, 0); 1435 bcopy(space, bp->b_data, (u_int)size); 1436 space = (char *)space + size; 1437 if (waitfor != MNT_WAIT) 1438 bawrite(bp); 1439 else if ((error = bwrite(bp)) != 0) 1440 allerror = error; 1441 } 1442 /* 1443 * Now write back the superblock itself. If any errors occurred 1444 * up to this point, then fail so that the superblock avoids 1445 * being written out as clean. 1446 */ 1447 if (allerror) { 1448 brelse(sbbp); 1449 return (allerror); 1450 } 1451 bp = sbbp; 1452 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && 1453 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1454 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1455 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); 1456 fs->fs_sblockloc = SBLOCK_UFS1; 1457 } 1458 if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && 1459 (fs->fs_flags & FS_FLAGS_UPDATED) == 0) { 1460 printf("%s: correcting fs_sblockloc from %jd to %d\n", 1461 fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); 1462 fs->fs_sblockloc = SBLOCK_UFS2; 1463 } 1464 fs->fs_fmod = 0; 1465 fs->fs_time = time_second; 1466 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1467 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1468 if (waitfor != MNT_WAIT) 1469 bawrite(bp); 1470 else if ((error = bwrite(bp)) != 0) 1471 allerror = error; 1472 return (allerror); 1473} 1474 1475static int 1476ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, 1477 int attrnamespace, const char *attrname, struct thread *td) 1478{ 1479 1480#ifdef UFS_EXTATTR 1481 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, 1482 attrname, td)); 1483#else 1484 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, 1485 attrname, td)); 1486#endif 1487} 1488 1489static void 1490ffs_ifree(struct ufsmount *ump, struct inode *ip) 1491{ 1492 1493 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) 1494 uma_zfree(uma_ufs1, ip->i_din1); 1495 else if (ip->i_din2 != NULL) 1496 uma_zfree(uma_ufs2, ip->i_din2); 1497 uma_zfree(uma_inode, ip); 1498} 1499 1500static int dobkgrdwrite = 1; 1501SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, 1502 "Do background writes (honoring the BV_BKGRDWRITE flag)?"); 1503 1504/* 1505 * Complete a background write started from bwrite. 1506 */ 1507static void 1508ffs_backgroundwritedone(struct buf *bp) 1509{ 1510 struct bufobj *bufobj; 1511 struct buf *origbp; 1512 1513 /* 1514 * Find the original buffer that we are writing. 1515 */ 1516 bufobj = bp->b_bufobj; 1517 BO_LOCK(bufobj); 1518 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) 1519 panic("backgroundwritedone: lost buffer"); 1520 /* Grab an extra reference to be dropped by the bufdone() below. */ 1521 bufobj_wrefl(bufobj); 1522 BO_UNLOCK(bufobj); 1523 /* 1524 * Process dependencies then return any unfinished ones. 1525 */ 1526 if (LIST_FIRST(&bp->b_dep) != NULL) 1527 buf_complete(bp); 1528#ifdef SOFTUPDATES 1529 if (LIST_FIRST(&bp->b_dep) != NULL) 1530 softdep_move_dependencies(bp, origbp); 1531#endif 1532 /* 1533 * This buffer is marked B_NOCACHE so when it is released 1534 * by biodone it will be tossed. 1535 */ 1536 bp->b_flags |= B_NOCACHE; 1537 bp->b_flags &= ~(B_CACHE | B_DONE); 1538 bufdone(bp); 1539 BO_LOCK(bufobj); 1540 /* 1541 * Clear the BV_BKGRDINPROG flag in the original buffer 1542 * and awaken it if it is waiting for the write to complete. 1543 * If BV_BKGRDINPROG is not set in the original buffer it must 1544 * have been released and re-instantiated - which is not legal. 1545 */ 1546 KASSERT((origbp->b_vflags & BV_BKGRDINPROG), 1547 ("backgroundwritedone: lost buffer2")); 1548 origbp->b_vflags &= ~BV_BKGRDINPROG; 1549 if (origbp->b_vflags & BV_BKGRDWAIT) { 1550 origbp->b_vflags &= ~BV_BKGRDWAIT; 1551 wakeup(&origbp->b_xflags); 1552 } 1553 BO_UNLOCK(bufobj); 1554} 1555 1556 1557/* 1558 * Write, release buffer on completion. (Done by iodone 1559 * if async). Do not bother writing anything if the buffer 1560 * is invalid. 1561 * 1562 * Note that we set B_CACHE here, indicating that buffer is 1563 * fully valid and thus cacheable. This is true even of NFS 1564 * now so we set it generally. This could be set either here 1565 * or in biodone() since the I/O is synchronous. We put it 1566 * here. 1567 */ 1568static int 1569ffs_bufwrite(struct buf *bp) 1570{ 1571 int oldflags, s; 1572 struct buf *newbp; 1573 1574 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); 1575 if (bp->b_flags & B_INVAL) { 1576 brelse(bp); 1577 return (0); 1578 } 1579 1580 oldflags = bp->b_flags; 1581 1582 if (BUF_REFCNT(bp) == 0) 1583 panic("bufwrite: buffer is not busy???"); 1584 s = splbio(); 1585 /* 1586 * If a background write is already in progress, delay 1587 * writing this block if it is asynchronous. Otherwise 1588 * wait for the background write to complete. 1589 */ 1590 BO_LOCK(bp->b_bufobj); 1591 if (bp->b_vflags & BV_BKGRDINPROG) { 1592 if (bp->b_flags & B_ASYNC) { 1593 BO_UNLOCK(bp->b_bufobj); 1594 splx(s); 1595 bdwrite(bp); 1596 return (0); 1597 } 1598 bp->b_vflags |= BV_BKGRDWAIT; 1599 msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0); 1600 if (bp->b_vflags & BV_BKGRDINPROG) 1601 panic("bufwrite: still writing"); 1602 } 1603 BO_UNLOCK(bp->b_bufobj); 1604 1605 /* Mark the buffer clean */ 1606 bundirty(bp); 1607 1608 /* 1609 * If this buffer is marked for background writing and we 1610 * do not have to wait for it, make a copy and write the 1611 * copy so as to leave this buffer ready for further use. 1612 * 1613 * This optimization eats a lot of memory. If we have a page 1614 * or buffer shortfall we can't do it. 1615 */ 1616 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && 1617 (bp->b_flags & B_ASYNC) && 1618 !vm_page_count_severe() && 1619 !buf_dirty_count_severe()) { 1620 KASSERT(bp->b_iodone == NULL, 1621 ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); 1622 1623 /* get a new block */ 1624 newbp = geteblk(bp->b_bufsize); 1625 1626 /* 1627 * set it to be identical to the old block. We have to 1628 * set b_lblkno and BKGRDMARKER before calling bgetvp() 1629 * to avoid confusing the splay tree and gbincore(). 1630 */ 1631 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); 1632 newbp->b_lblkno = bp->b_lblkno; 1633 newbp->b_xflags |= BX_BKGRDMARKER; 1634 BO_LOCK(bp->b_bufobj); 1635 bp->b_vflags |= BV_BKGRDINPROG; 1636 bgetvp(bp->b_vp, newbp); 1637 BO_UNLOCK(bp->b_bufobj); 1638 newbp->b_bufobj = &bp->b_vp->v_bufobj; 1639 newbp->b_blkno = bp->b_blkno; 1640 newbp->b_offset = bp->b_offset; 1641 newbp->b_iodone = ffs_backgroundwritedone; 1642 newbp->b_flags |= B_ASYNC; 1643 newbp->b_flags &= ~B_INVAL; 1644 1645#ifdef SOFTUPDATES 1646 /* move over the dependencies */ 1647 if (LIST_FIRST(&bp->b_dep) != NULL) 1648 softdep_move_dependencies(bp, newbp); 1649#endif 1650 1651 /* 1652 * Initiate write on the copy, release the original to 1653 * the B_LOCKED queue so that it cannot go away until 1654 * the background write completes. If not locked it could go 1655 * away and then be reconstituted while it was being written. 1656 * If the reconstituted buffer were written, we could end up 1657 * with two background copies being written at the same time. 1658 */ 1659 bqrelse(bp); 1660 bp = newbp; 1661 } 1662 1663 /* Let the normal bufwrite do the rest for us */ 1664 bufwrite(bp); 1665 1666 return (0); 1667} 1668 1669 1670static void 1671ffs_geom_strategy(struct bufobj *bo, struct buf *bp) 1672{ 1673 struct vnode *vp; 1674 int error; 1675 1676 vp = bo->__bo_vnode; 1677 if (bp->b_iocmd == BIO_WRITE) { 1678#ifdef SOFTUPDATES 1679 if (LIST_FIRST(&bp->b_dep) != NULL) 1680 buf_start(bp); 1681#endif 1682 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && 1683 bp->b_vp != NULL && bp->b_vp->v_mount != NULL && 1684 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) 1685 panic("ffs_geom_strategy: bad I/O"); 1686 bp->b_flags &= ~B_VALIDSUSPWRT; 1687 if ((vp->v_vflag & VV_COPYONWRITE) && 1688 vp->v_rdev->si_snapdata != NULL && 1689 (error = (ffs_copyonwrite)(vp, bp)) != 0 && 1690 error != EOPNOTSUPP) { 1691 bp->b_error = error; 1692 bp->b_ioflags |= BIO_ERROR; 1693 bufdone(bp); 1694 return; 1695 } 1696 } 1697 g_vfs_strategy(bo, bp); 1698} 1699