1 /* $NetBSD: lfs_vfsops.c,v 1.321 2014/04/16 18:55:19 maxv Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001, 2002, 2003, 2007, 2007 5 * The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Konrad E. Schroder <perseant@hhhh.org>. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 /*- 33 * Copyright (c) 1989, 1991, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)lfs_vfsops.c 8.20 (Berkeley) 6/10/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: lfs_vfsops.c,v 1.321 2014/04/16 18:55:19 maxv Exp $"); 65 66 #if defined(_KERNEL_OPT) 67 #include "opt_lfs.h" 68 #include "opt_quota.h" 69 #endif 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/namei.h> 74 #include <sys/proc.h> 75 #include <sys/kernel.h> 76 #include <sys/vnode.h> 77 #include <sys/mount.h> 78 #include <sys/kthread.h> 79 #include <sys/buf.h> 80 #include <sys/device.h> 81 #include <sys/mbuf.h> 82 #include <sys/file.h> 83 #include <sys/disklabel.h> 84 #include <sys/ioctl.h> 85 #include <sys/errno.h> 86 #include <sys/malloc.h> 87 #include <sys/pool.h> 88 #include <sys/socket.h> 89 #include <sys/syslog.h> 90 #include <uvm/uvm_extern.h> 91 #include <sys/sysctl.h> 92 #include <sys/conf.h> 93 #include <sys/kauth.h> 94 #include <sys/module.h> 95 #include <sys/syscallvar.h> 96 #include <sys/syscall.h> 97 #include <sys/syscallargs.h> 98 99 #include <miscfs/specfs/specdev.h> 100 101 #include <ufs/lfs/ulfs_quotacommon.h> 102 #include <ufs/lfs/ulfs_inode.h> 103 #include <ufs/lfs/ulfsmount.h> 104 #include <ufs/lfs/ulfs_extern.h> 105 106 #include <uvm/uvm.h> 107 #include <uvm/uvm_stat.h> 108 #include <uvm/uvm_pager.h> 109 #include <uvm/uvm_pdaemon.h> 110 111 #include <ufs/lfs/lfs.h> 112 #include <ufs/lfs/lfs_kernel.h> 113 #include <ufs/lfs/lfs_extern.h> 114 115 #include <miscfs/genfs/genfs.h> 116 #include <miscfs/genfs/genfs_node.h> 117 118 MODULE(MODULE_CLASS_VFS, lfs, NULL); 119 120 static int lfs_gop_write(struct vnode *, struct vm_page **, int, int); 121 static int lfs_mountfs(struct vnode *, struct mount *, struct lwp *); 122 static int lfs_extattrctl(struct mount *, int, struct vnode *, int, 123 const char *); 124 125 static struct sysctllog *lfs_sysctl_log; 126 127 extern const struct vnodeopv_desc lfs_vnodeop_opv_desc; 128 extern const struct vnodeopv_desc lfs_specop_opv_desc; 129 extern const struct vnodeopv_desc lfs_fifoop_opv_desc; 130 131 pid_t lfs_writer_daemon = 0; 132 lwpid_t lfs_writer_lid = 0; 133 int lfs_do_flush = 0; 134 #ifdef LFS_KERNEL_RFW 135 int lfs_do_rfw = 0; 136 #endif 137 138 const struct vnodeopv_desc * const lfs_vnodeopv_descs[] = { 139 &lfs_vnodeop_opv_desc, 140 &lfs_specop_opv_desc, 141 &lfs_fifoop_opv_desc, 142 NULL, 143 }; 144 145 struct vfsops lfs_vfsops = { 146 .vfs_name = MOUNT_LFS, 147 .vfs_min_mount_data = sizeof (struct ulfs_args), 148 .vfs_mount = lfs_mount, 149 .vfs_start = ulfs_start, 150 .vfs_unmount = lfs_unmount, 151 .vfs_root = ulfs_root, 152 .vfs_quotactl = ulfs_quotactl, 153 .vfs_statvfs = lfs_statvfs, 154 .vfs_sync = lfs_sync, 155 .vfs_vget = lfs_vget, 156 .vfs_fhtovp = lfs_fhtovp, 157 .vfs_vptofh = lfs_vptofh, 158 .vfs_init = lfs_init, 159 .vfs_reinit = lfs_reinit, 160 .vfs_done = lfs_done, 161 .vfs_mountroot = lfs_mountroot, 162 .vfs_snapshot = (void *)eopnotsupp, 163 .vfs_extattrctl = lfs_extattrctl, 164 .vfs_suspendctl = (void *)eopnotsupp, 165 .vfs_renamelock_enter = genfs_renamelock_enter, 166 .vfs_renamelock_exit = genfs_renamelock_exit, 167 .vfs_fsync = (void *)eopnotsupp, 168 .vfs_opv_descs = lfs_vnodeopv_descs 169 }; 170 171 const struct genfs_ops lfs_genfsops = { 172 .gop_size = lfs_gop_size, 173 .gop_alloc = ulfs_gop_alloc, 174 .gop_write = lfs_gop_write, 175 .gop_markupdate = ulfs_gop_markupdate, 176 }; 177 178 struct shortlong { 179 const char *sname; 180 const char *lname; 181 }; 182 183 static int 184 sysctl_lfs_dostats(SYSCTLFN_ARGS) 185 { 186 extern struct lfs_stats lfs_stats; 187 extern int lfs_dostats; 188 int error; 189 190 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 191 if (error || newp == NULL) 192 return (error); 193 194 if (lfs_dostats == 0) 195 memset(&lfs_stats, 0, sizeof(lfs_stats)); 196 197 return (0); 198 } 199 200 static void 201 lfs_sysctl_setup(struct sysctllog **clog) 202 { 203 int i; 204 extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead, 205 lfs_fs_pagetrip, lfs_ignore_lazy_sync; 206 #ifdef DEBUG 207 extern int lfs_debug_log_subsys[DLOG_MAX]; 208 struct shortlong dlog_names[DLOG_MAX] = { /* Must match lfs.h ! */ 209 { "rollforward", "Debug roll-forward code" }, 210 { "alloc", "Debug inode allocation and free list" }, 211 { "avail", "Debug space-available-now accounting" }, 212 { "flush", "Debug flush triggers" }, 213 { "lockedlist", "Debug locked list accounting" }, 214 { "vnode_verbose", "Verbose per-vnode-written debugging" }, 215 { "vnode", "Debug vnode use during segment write" }, 216 { "segment", "Debug segment writing" }, 217 { "seguse", "Debug segment used-bytes accounting" }, 218 { "cleaner", "Debug cleaning routines" }, 219 { "mount", "Debug mount/unmount routines" }, 220 { "pagecache", "Debug UBC interactions" }, 221 { "dirop", "Debug directory-operation accounting" }, 222 { "malloc", "Debug private malloc accounting" }, 223 }; 224 #endif /* DEBUG */ 225 struct shortlong stat_names[] = { /* Must match lfs.h! */ 226 { "segsused", "Number of new segments allocated" }, 227 { "psegwrites", "Number of partial-segment writes" }, 228 { "psyncwrites", "Number of synchronous partial-segment" 229 " writes" }, 230 { "pcleanwrites", "Number of partial-segment writes by the" 231 " cleaner" }, 232 { "blocktot", "Number of blocks written" }, 233 { "cleanblocks", "Number of blocks written by the cleaner" }, 234 { "ncheckpoints", "Number of checkpoints made" }, 235 { "nwrites", "Number of whole writes" }, 236 { "nsync_writes", "Number of synchronous writes" }, 237 { "wait_exceeded", "Number of times writer waited for" 238 " cleaner" }, 239 { "write_exceeded", "Number of times writer invoked flush" }, 240 { "flush_invoked", "Number of times flush was invoked" }, 241 { "vflush_invoked", "Number of time vflush was called" }, 242 { "clean_inlocked", "Number of vnodes skipped for being dead" }, 243 { "clean_vnlocked", "Number of vnodes skipped for vget failure" }, 244 { "segs_reclaimed", "Number of segments reclaimed" }, 245 }; 246 247 sysctl_createv(clog, 0, NULL, NULL, 248 CTLFLAG_PERMANENT, 249 CTLTYPE_NODE, "lfs", 250 SYSCTL_DESCR("Log-structured file system"), 251 NULL, 0, NULL, 0, 252 CTL_VFS, 5, CTL_EOL); 253 /* 254 * XXX the "5" above could be dynamic, thereby eliminating one 255 * more instance of the "number to vfs" mapping problem, but 256 * "5" is the order as taken from sys/mount.h 257 */ 258 259 sysctl_createv(clog, 0, NULL, NULL, 260 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 261 CTLTYPE_INT, "flushindir", NULL, 262 NULL, 0, &lfs_writeindir, 0, 263 CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); 264 sysctl_createv(clog, 0, NULL, NULL, 265 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 266 CTLTYPE_INT, "clean_vnhead", NULL, 267 NULL, 0, &lfs_clean_vnhead, 0, 268 CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); 269 sysctl_createv(clog, 0, NULL, NULL, 270 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 271 CTLTYPE_INT, "dostats", 272 SYSCTL_DESCR("Maintain statistics on LFS operations"), 273 sysctl_lfs_dostats, 0, &lfs_dostats, 0, 274 CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); 275 sysctl_createv(clog, 0, NULL, NULL, 276 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 277 CTLTYPE_INT, "pagetrip", 278 SYSCTL_DESCR("How many dirty pages in fs triggers" 279 " a flush"), 280 NULL, 0, &lfs_fs_pagetrip, 0, 281 CTL_VFS, 5, LFS_FS_PAGETRIP, CTL_EOL); 282 sysctl_createv(clog, 0, NULL, NULL, 283 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 284 CTLTYPE_INT, "ignore_lazy_sync", 285 SYSCTL_DESCR("Lazy Sync is ignored entirely"), 286 NULL, 0, &lfs_ignore_lazy_sync, 0, 287 CTL_VFS, 5, LFS_IGNORE_LAZY_SYNC, CTL_EOL); 288 #ifdef LFS_KERNEL_RFW 289 sysctl_createv(clog, 0, NULL, NULL, 290 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 291 CTLTYPE_INT, "rfw", 292 SYSCTL_DESCR("Use in-kernel roll-forward on mount"), 293 NULL, 0, &lfs_do_rfw, 0, 294 CTL_VFS, 5, LFS_DO_RFW, CTL_EOL); 295 #endif 296 297 sysctl_createv(clog, 0, NULL, NULL, 298 CTLFLAG_PERMANENT, 299 CTLTYPE_NODE, "stats", 300 SYSCTL_DESCR("Debugging options"), 301 NULL, 0, NULL, 0, 302 CTL_VFS, 5, LFS_STATS, CTL_EOL); 303 for (i = 0; i < sizeof(struct lfs_stats) / sizeof(u_int); i++) { 304 sysctl_createv(clog, 0, NULL, NULL, 305 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 306 CTLTYPE_INT, stat_names[i].sname, 307 SYSCTL_DESCR(stat_names[i].lname), 308 NULL, 0, &(((u_int *)&lfs_stats.segsused)[i]), 309 0, CTL_VFS, 5, LFS_STATS, i, CTL_EOL); 310 } 311 312 #ifdef DEBUG 313 sysctl_createv(clog, 0, NULL, NULL, 314 CTLFLAG_PERMANENT, 315 CTLTYPE_NODE, "debug", 316 SYSCTL_DESCR("Debugging options"), 317 NULL, 0, NULL, 0, 318 CTL_VFS, 5, LFS_DEBUGLOG, CTL_EOL); 319 for (i = 0; i < DLOG_MAX; i++) { 320 sysctl_createv(clog, 0, NULL, NULL, 321 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 322 CTLTYPE_INT, dlog_names[i].sname, 323 SYSCTL_DESCR(dlog_names[i].lname), 324 NULL, 0, &(lfs_debug_log_subsys[i]), 0, 325 CTL_VFS, 5, LFS_DEBUGLOG, i, CTL_EOL); 326 } 327 #endif 328 } 329 330 /* old cleaner syscall interface. see VOP_FCNTL() */ 331 static const struct syscall_package lfs_syscalls[] = { 332 { SYS_lfs_bmapv, 0, (sy_call_t *)sys_lfs_bmapv }, 333 { SYS_lfs_markv, 0, (sy_call_t *)sys_lfs_markv }, 334 { SYS_lfs_segclean, 0, (sy_call_t *)sys___lfs_segwait50 }, 335 { 0, 0, NULL }, 336 }; 337 338 static int 339 lfs_modcmd(modcmd_t cmd, void *arg) 340 { 341 int error; 342 343 switch (cmd) { 344 case MODULE_CMD_INIT: 345 error = syscall_establish(NULL, lfs_syscalls); 346 if (error) 347 return error; 348 error = vfs_attach(&lfs_vfsops); 349 if (error != 0) { 350 syscall_disestablish(NULL, lfs_syscalls); 351 break; 352 } 353 lfs_sysctl_setup(&lfs_sysctl_log); 354 break; 355 case MODULE_CMD_FINI: 356 error = vfs_detach(&lfs_vfsops); 357 if (error != 0) 358 break; 359 syscall_disestablish(NULL, lfs_syscalls); 360 sysctl_teardown(&lfs_sysctl_log); 361 break; 362 default: 363 error = ENOTTY; 364 break; 365 } 366 367 return (error); 368 } 369 370 /* 371 * XXX Same structure as FFS inodes? Should we share a common pool? 372 */ 373 struct pool lfs_inode_pool; 374 struct pool lfs_dinode_pool; 375 struct pool lfs_inoext_pool; 376 struct pool lfs_lbnentry_pool; 377 378 /* 379 * The writer daemon. UVM keeps track of how many dirty pages we are holding 380 * in lfs_subsys_pages; the daemon flushes the filesystem when this value 381 * crosses the (user-defined) threshhold LFS_MAX_PAGES. 382 */ 383 static void 384 lfs_writerd(void *arg) 385 { 386 struct mount *mp, *nmp; 387 struct lfs *fs; 388 struct vfsops *vfs = NULL; 389 int fsflags; 390 int skipc; 391 int lfsc; 392 int wrote_something = 0; 393 394 mutex_enter(&lfs_lock); 395 lfs_writer_daemon = curproc->p_pid; 396 lfs_writer_lid = curlwp->l_lid; 397 mutex_exit(&lfs_lock); 398 399 /* Take an extra reference to the LFS vfsops. */ 400 vfs = vfs_getopsbyname(MOUNT_LFS); 401 402 mutex_enter(&lfs_lock); 403 for (;;) { 404 KASSERT(mutex_owned(&lfs_lock)); 405 if (wrote_something == 0) 406 mtsleep(&lfs_writer_daemon, PVM, "lfswriter", hz/10 + 1, 407 &lfs_lock); 408 409 KASSERT(mutex_owned(&lfs_lock)); 410 wrote_something = 0; 411 412 /* 413 * If global state wants a flush, flush everything. 414 */ 415 if (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || 416 locked_queue_bytes > LFS_MAX_BYTES || 417 lfs_subsys_pages > LFS_MAX_PAGES) { 418 419 if (lfs_do_flush) { 420 DLOG((DLOG_FLUSH, "lfs_writerd: lfs_do_flush\n")); 421 } 422 if (locked_queue_count > LFS_MAX_BUFS) { 423 DLOG((DLOG_FLUSH, "lfs_writerd: lqc = %d, max %d\n", 424 locked_queue_count, LFS_MAX_BUFS)); 425 } 426 if (locked_queue_bytes > LFS_MAX_BYTES) { 427 DLOG((DLOG_FLUSH, "lfs_writerd: lqb = %ld, max %ld\n", 428 locked_queue_bytes, LFS_MAX_BYTES)); 429 } 430 if (lfs_subsys_pages > LFS_MAX_PAGES) { 431 DLOG((DLOG_FLUSH, "lfs_writerd: lssp = %d, max %d\n", 432 lfs_subsys_pages, LFS_MAX_PAGES)); 433 } 434 435 lfs_flush(NULL, SEGM_WRITERD, 0); 436 lfs_do_flush = 0; 437 KASSERT(mutex_owned(&lfs_lock)); 438 continue; 439 } 440 KASSERT(mutex_owned(&lfs_lock)); 441 mutex_exit(&lfs_lock); 442 443 /* 444 * Look through the list of LFSs to see if any of them 445 * have requested pageouts. 446 */ 447 mutex_enter(&mountlist_lock); 448 lfsc = 0; 449 skipc = 0; 450 for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { 451 if (vfs_busy(mp, &nmp)) { 452 ++skipc; 453 continue; 454 } 455 KASSERT(!mutex_owned(&lfs_lock)); 456 if (strncmp(mp->mnt_stat.f_fstypename, MOUNT_LFS, 457 sizeof(mp->mnt_stat.f_fstypename)) == 0) { 458 ++lfsc; 459 fs = VFSTOULFS(mp)->um_lfs; 460 int32_t ooffset = 0; 461 fsflags = SEGM_SINGLE; 462 463 mutex_enter(&lfs_lock); 464 ooffset = fs->lfs_offset; 465 466 if (fs->lfs_nextseg < fs->lfs_curseg && fs->lfs_nowrap) { 467 /* Don't try to write if we're suspended */ 468 mutex_exit(&lfs_lock); 469 vfs_unbusy(mp, false, &nmp); 470 continue; 471 } 472 if (LFS_STARVED_FOR_SEGS(fs)) { 473 mutex_exit(&lfs_lock); 474 475 DLOG((DLOG_FLUSH, "lfs_writerd: need cleaning before writing possible\n")); 476 lfs_wakeup_cleaner(fs); 477 vfs_unbusy(mp, false, &nmp); 478 continue; 479 } 480 481 if ((fs->lfs_dirvcount > LFS_MAX_FSDIROP(fs) || 482 lfs_dirvcount > LFS_MAX_DIROP) && 483 fs->lfs_dirops == 0) { 484 fsflags &= ~SEGM_SINGLE; 485 fsflags |= SEGM_CKP; 486 DLOG((DLOG_FLUSH, "lfs_writerd: checkpoint\n")); 487 lfs_flush_fs(fs, fsflags); 488 } else if (fs->lfs_pdflush) { 489 DLOG((DLOG_FLUSH, "lfs_writerd: pdflush set\n")); 490 lfs_flush_fs(fs, fsflags); 491 } else if (!TAILQ_EMPTY(&fs->lfs_pchainhd)) { 492 DLOG((DLOG_FLUSH, "lfs_writerd: pchain non-empty\n")); 493 mutex_exit(&lfs_lock); 494 lfs_writer_enter(fs, "wrdirop"); 495 lfs_flush_pchain(fs); 496 lfs_writer_leave(fs); 497 mutex_enter(&lfs_lock); 498 } 499 if (fs->lfs_offset != ooffset) 500 ++wrote_something; 501 mutex_exit(&lfs_lock); 502 } 503 KASSERT(!mutex_owned(&lfs_lock)); 504 vfs_unbusy(mp, false, &nmp); 505 } 506 if (lfsc + skipc == 0) { 507 mutex_enter(&lfs_lock); 508 lfs_writer_daemon = 0; 509 lfs_writer_lid = 0; 510 mutex_exit(&lfs_lock); 511 mutex_exit(&mountlist_lock); 512 break; 513 } 514 mutex_exit(&mountlist_lock); 515 516 mutex_enter(&lfs_lock); 517 } 518 KASSERT(!mutex_owned(&lfs_lock)); 519 KASSERT(!mutex_owned(&mountlist_lock)); 520 521 /* Give up our extra reference so the module can be unloaded. */ 522 mutex_enter(&vfs_list_lock); 523 if (vfs != NULL) 524 vfs->vfs_refcount--; 525 mutex_exit(&vfs_list_lock); 526 527 /* Done! */ 528 kthread_exit(0); 529 } 530 531 /* 532 * Initialize the filesystem, most work done by ulfs_init. 533 */ 534 void 535 lfs_init(void) 536 { 537 538 malloc_type_attach(M_SEGMENT); 539 pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, 540 "lfsinopl", &pool_allocator_nointr, IPL_NONE); 541 pool_init(&lfs_dinode_pool, sizeof(struct ulfs1_dinode), 0, 0, 0, 542 "lfsdinopl", &pool_allocator_nointr, IPL_NONE); 543 pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, 544 "lfsinoextpl", &pool_allocator_nointr, IPL_NONE); 545 pool_init(&lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, 546 "lfslbnpool", &pool_allocator_nointr, IPL_NONE); 547 ulfs_init(); 548 549 #ifdef DEBUG 550 memset(lfs_log, 0, sizeof(lfs_log)); 551 #endif 552 mutex_init(&lfs_lock, MUTEX_DEFAULT, IPL_NONE); 553 cv_init(&locked_queue_cv, "lfsbuf"); 554 cv_init(&lfs_writing_cv, "lfsflush"); 555 } 556 557 void 558 lfs_reinit(void) 559 { 560 ulfs_reinit(); 561 } 562 563 void 564 lfs_done(void) 565 { 566 ulfs_done(); 567 mutex_destroy(&lfs_lock); 568 cv_destroy(&locked_queue_cv); 569 cv_destroy(&lfs_writing_cv); 570 pool_destroy(&lfs_inode_pool); 571 pool_destroy(&lfs_dinode_pool); 572 pool_destroy(&lfs_inoext_pool); 573 pool_destroy(&lfs_lbnentry_pool); 574 malloc_type_detach(M_SEGMENT); 575 } 576 577 /* 578 * Called by main() when ulfs is going to be mounted as root. 579 */ 580 int 581 lfs_mountroot(void) 582 { 583 extern struct vnode *rootvp; 584 struct lfs *fs = NULL; /* LFS */ 585 struct mount *mp; 586 struct lwp *l = curlwp; 587 struct ulfsmount *ump; 588 int error; 589 590 if (device_class(root_device) != DV_DISK) 591 return (ENODEV); 592 593 if (rootdev == NODEV) 594 return (ENODEV); 595 if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device", &mp))) { 596 vrele(rootvp); 597 return (error); 598 } 599 if ((error = lfs_mountfs(rootvp, mp, l))) { 600 vfs_unbusy(mp, false, NULL); 601 vfs_destroy(mp); 602 return (error); 603 } 604 mountlist_append(mp); 605 ump = VFSTOULFS(mp); 606 fs = ump->um_lfs; 607 memset(fs->lfs_fsmnt, 0, sizeof(fs->lfs_fsmnt)); 608 (void)copystr(mp->mnt_stat.f_mntonname, fs->lfs_fsmnt, MNAMELEN - 1, 0); 609 (void)lfs_statvfs(mp, &mp->mnt_stat); 610 vfs_unbusy(mp, false, NULL); 611 setrootfstime((time_t)(VFSTOULFS(mp)->um_lfs->lfs_tstamp)); 612 return (0); 613 } 614 615 /* 616 * VFS Operations. 617 * 618 * mount system call 619 */ 620 int 621 lfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 622 { 623 struct lwp *l = curlwp; 624 struct vnode *devvp; 625 struct ulfs_args *args = data; 626 struct ulfsmount *ump = NULL; 627 struct lfs *fs = NULL; /* LFS */ 628 int error = 0, update; 629 mode_t accessmode; 630 631 if (args == NULL) 632 return EINVAL; 633 if (*data_len < sizeof *args) 634 return EINVAL; 635 636 if (mp->mnt_flag & MNT_GETARGS) { 637 ump = VFSTOULFS(mp); 638 if (ump == NULL) 639 return EIO; 640 args->fspec = NULL; 641 *data_len = sizeof *args; 642 return 0; 643 } 644 645 update = mp->mnt_flag & MNT_UPDATE; 646 647 /* Check arguments */ 648 if (args->fspec != NULL) { 649 /* 650 * Look up the name and verify that it's sane. 651 */ 652 error = namei_simple_user(args->fspec, 653 NSM_FOLLOW_NOEMULROOT, &devvp); 654 if (error != 0) 655 return (error); 656 657 if (!update) { 658 /* 659 * Be sure this is a valid block device 660 */ 661 if (devvp->v_type != VBLK) 662 error = ENOTBLK; 663 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 664 error = ENXIO; 665 } else { 666 /* 667 * Be sure we're still naming the same device 668 * used for our initial mount 669 */ 670 ump = VFSTOULFS(mp); 671 if (devvp != ump->um_devvp) { 672 if (devvp->v_rdev != ump->um_devvp->v_rdev) 673 error = EINVAL; 674 else { 675 vrele(devvp); 676 devvp = ump->um_devvp; 677 vref(devvp); 678 } 679 } 680 } 681 } else { 682 if (!update) { 683 /* New mounts must have a filename for the device */ 684 return (EINVAL); 685 } else { 686 /* Use the extant mount */ 687 ump = VFSTOULFS(mp); 688 devvp = ump->um_devvp; 689 vref(devvp); 690 } 691 } 692 693 694 /* 695 * If mount by non-root, then verify that user has necessary 696 * permissions on the device. 697 */ 698 if (error == 0) { 699 accessmode = VREAD; 700 if (update ? 701 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 702 (mp->mnt_flag & MNT_RDONLY) == 0) 703 accessmode |= VWRITE; 704 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 705 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 706 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 707 KAUTH_ARG(accessmode)); 708 VOP_UNLOCK(devvp); 709 } 710 711 if (error) { 712 vrele(devvp); 713 return (error); 714 } 715 716 if (!update) { 717 int flags; 718 719 if (mp->mnt_flag & MNT_RDONLY) 720 flags = FREAD; 721 else 722 flags = FREAD|FWRITE; 723 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 724 error = VOP_OPEN(devvp, flags, FSCRED); 725 VOP_UNLOCK(devvp); 726 if (error) 727 goto fail; 728 error = lfs_mountfs(devvp, mp, l); /* LFS */ 729 if (error) { 730 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 731 (void)VOP_CLOSE(devvp, flags, NOCRED); 732 VOP_UNLOCK(devvp); 733 goto fail; 734 } 735 736 ump = VFSTOULFS(mp); 737 fs = ump->um_lfs; 738 } else { 739 /* 740 * Update the mount. 741 */ 742 743 /* 744 * The initial mount got a reference on this 745 * device, so drop the one obtained via 746 * namei(), above. 747 */ 748 vrele(devvp); 749 750 ump = VFSTOULFS(mp); 751 fs = ump->um_lfs; 752 753 if (fs->lfs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 754 /* 755 * Changing from read/write to read-only. 756 * XXX: shouldn't we sync here? or does vfs do that? 757 */ 758 #ifdef LFS_QUOTA2 759 /* XXX: quotas should remain on when readonly */ 760 if (fs->lfs_use_quota2) { 761 error = lfsquota2_umount(mp, 0); 762 if (error) { 763 return error; 764 } 765 } 766 #endif 767 } 768 769 if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 770 /* 771 * Changing from read-only to read/write. 772 * Note in the superblocks that we're writing. 773 */ 774 775 /* XXX: quotas should have been on even if readonly */ 776 if (fs->lfs_use_quota2) { 777 #ifdef LFS_QUOTA2 778 error = lfs_quota2_mount(mp); 779 #else 780 uprintf("%s: no kernel support for this " 781 "filesystem's quotas\n", 782 mp->mnt_stat.f_mntonname); 783 if (mp->mnt_flag & MNT_FORCE) { 784 uprintf("%s: mounting anyway; " 785 "fsck afterwards\n", 786 mp->mnt_stat.f_mntonname); 787 } else { 788 error = EINVAL; 789 } 790 #endif 791 if (error) { 792 return error; 793 } 794 } 795 796 fs->lfs_ronly = 0; 797 if (fs->lfs_pflags & LFS_PF_CLEAN) { 798 fs->lfs_pflags &= ~LFS_PF_CLEAN; 799 lfs_writesuper(fs, fs->lfs_sboffs[0]); 800 lfs_writesuper(fs, fs->lfs_sboffs[1]); 801 } 802 } 803 if (args->fspec == NULL) 804 return EINVAL; 805 } 806 807 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 808 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 809 if (error == 0) 810 (void)strncpy(fs->lfs_fsmnt, mp->mnt_stat.f_mntonname, 811 sizeof(fs->lfs_fsmnt)); 812 return error; 813 814 fail: 815 vrele(devvp); 816 return (error); 817 } 818 819 820 /* 821 * Common code for mount and mountroot 822 * LFS specific 823 */ 824 int 825 lfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 826 { 827 struct dlfs *tdfs, *dfs, *adfs; 828 struct lfs *fs; 829 struct ulfsmount *ump; 830 struct vnode *vp; 831 struct buf *bp, *abp; 832 dev_t dev; 833 int error, i, ronly, fsbsize; 834 kauth_cred_t cred; 835 CLEANERINFO *cip; 836 SEGUSE *sup; 837 daddr_t sb_addr; 838 839 cred = l ? l->l_cred : NOCRED; 840 841 /* 842 * Flush out any old buffers remaining from a previous use. 843 */ 844 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 845 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 846 VOP_UNLOCK(devvp); 847 if (error) 848 return (error); 849 850 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 851 852 /* Don't free random space on error. */ 853 bp = NULL; 854 abp = NULL; 855 ump = NULL; 856 857 sb_addr = LFS_LABELPAD / DEV_BSIZE; 858 while (1) { 859 /* Read in the superblock. */ 860 error = bread(devvp, sb_addr, LFS_SBPAD, cred, 0, &bp); 861 if (error) 862 goto out; 863 dfs = (struct dlfs *)bp->b_data; 864 865 /* Check the basics. */ 866 if (dfs->dlfs_magic != LFS_MAGIC || dfs->dlfs_bsize > MAXBSIZE || 867 dfs->dlfs_version > LFS_VERSION || 868 dfs->dlfs_bsize < sizeof(struct dlfs)) { 869 DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock sanity failed\n")); 870 error = EINVAL; /* XXX needs translation */ 871 goto out; 872 } 873 if (dfs->dlfs_inodefmt > LFS_MAXINODEFMT) { 874 DLOG((DLOG_MOUNT, "lfs_mountfs: unknown inode format %d\n", 875 dfs->dlfs_inodefmt)); 876 error = EINVAL; 877 goto out; 878 } 879 880 if (dfs->dlfs_version == 1) 881 fsbsize = DEV_BSIZE; 882 else { 883 fsbsize = 1 << dfs->dlfs_ffshift; 884 /* 885 * Could be, if the frag size is large enough, that we 886 * don't have the "real" primary superblock. If that's 887 * the case, get the real one, and try again. 888 */ 889 if (sb_addr != (dfs->dlfs_sboffs[0] << (dfs->dlfs_ffshift - DEV_BSHIFT))) { 890 DLOG((DLOG_MOUNT, "lfs_mountfs: sb daddr" 891 " 0x%llx is not right, trying 0x%llx\n", 892 (long long)sb_addr, 893 (long long)(dfs->dlfs_sboffs[0] << (dfs->dlfs_ffshift - DEV_BSHIFT)))); 894 sb_addr = dfs->dlfs_sboffs[0] << (dfs->dlfs_ffshift - DEV_BSHIFT); 895 brelse(bp, 0); 896 continue; 897 } 898 } 899 break; 900 } 901 902 /* 903 * Check the second superblock to see which is newer; then mount 904 * using the older of the two. This is necessary to ensure that 905 * the filesystem is valid if it was not unmounted cleanly. 906 */ 907 908 if (dfs->dlfs_sboffs[1] && 909 dfs->dlfs_sboffs[1] - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) 910 { 911 error = bread(devvp, dfs->dlfs_sboffs[1] * (fsbsize / DEV_BSIZE), 912 LFS_SBPAD, cred, 0, &abp); 913 if (error) 914 goto out; 915 adfs = (struct dlfs *)abp->b_data; 916 917 if (dfs->dlfs_version == 1) { 918 /* 1s resolution comparison */ 919 if (adfs->dlfs_tstamp < dfs->dlfs_tstamp) 920 tdfs = adfs; 921 else 922 tdfs = dfs; 923 } else { 924 /* monotonic infinite-resolution comparison */ 925 if (adfs->dlfs_serial < dfs->dlfs_serial) 926 tdfs = adfs; 927 else 928 tdfs = dfs; 929 } 930 931 /* Check the basics. */ 932 if (tdfs->dlfs_magic != LFS_MAGIC || 933 tdfs->dlfs_bsize > MAXBSIZE || 934 tdfs->dlfs_version > LFS_VERSION || 935 tdfs->dlfs_bsize < sizeof(struct dlfs)) { 936 DLOG((DLOG_MOUNT, "lfs_mountfs: alt superblock" 937 " sanity failed\n")); 938 error = EINVAL; /* XXX needs translation */ 939 goto out; 940 } 941 } else { 942 DLOG((DLOG_MOUNT, "lfs_mountfs: invalid alt superblock" 943 " daddr=0x%x\n", dfs->dlfs_sboffs[1])); 944 error = EINVAL; 945 goto out; 946 } 947 948 /* Allocate the mount structure, copy the superblock into it. */ 949 fs = kmem_zalloc(sizeof(struct lfs), KM_SLEEP); 950 memcpy(&fs->lfs_dlfs, tdfs, sizeof(struct dlfs)); 951 952 /* Compatibility */ 953 if (fs->lfs_version < 2) { 954 fs->lfs_sumsize = LFS_V1_SUMMARY_SIZE; 955 fs->lfs_ibsize = fs->lfs_bsize; 956 fs->lfs_start = fs->lfs_sboffs[0]; 957 fs->lfs_tstamp = fs->lfs_otstamp; 958 fs->lfs_fsbtodb = 0; 959 } 960 if (fs->lfs_resvseg == 0) 961 fs->lfs_resvseg = MIN(fs->lfs_minfreeseg - 1, \ 962 MAX(MIN_RESV_SEGS, fs->lfs_minfreeseg / 2 + 1)); 963 964 /* 965 * If we aren't going to be able to write meaningfully to this 966 * filesystem, and were not mounted readonly, bomb out now. 967 */ 968 if (lfs_fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) { 969 DLOG((DLOG_MOUNT, "lfs_mount: to mount this filesystem read/write," 970 " we need BUFPAGES >= %lld\n", 971 (long long)((bufmem_hiwater / bufmem_lowater) * 972 LFS_INVERSE_MAX_BYTES( 973 lfs_fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT))); 974 kmem_free(fs, sizeof(struct lfs)); 975 error = EFBIG; /* XXX needs translation */ 976 goto out; 977 } 978 979 /* Before rolling forward, lock so vget will sleep for other procs */ 980 if (l != NULL) { 981 fs->lfs_flags = LFS_NOTYET; 982 fs->lfs_rfpid = l->l_proc->p_pid; 983 } 984 985 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 986 ump->um_lfs = fs; 987 ump->um_fstype = ULFS1; 988 if (sizeof(struct lfs) < LFS_SBPAD) { /* XXX why? */ 989 brelse(bp, BC_INVAL); 990 brelse(abp, BC_INVAL); 991 } else { 992 brelse(bp, 0); 993 brelse(abp, 0); 994 } 995 bp = NULL; 996 abp = NULL; 997 998 999 /* Set up the I/O information */ 1000 fs->lfs_devbsize = DEV_BSIZE; 1001 fs->lfs_iocount = 0; 1002 fs->lfs_diropwait = 0; 1003 fs->lfs_activesb = 0; 1004 fs->lfs_uinodes = 0; 1005 fs->lfs_ravail = 0; 1006 fs->lfs_favail = 0; 1007 fs->lfs_sbactive = 0; 1008 1009 /* Set up the ifile and lock aflags */ 1010 fs->lfs_doifile = 0; 1011 fs->lfs_writer = 0; 1012 fs->lfs_dirops = 0; 1013 fs->lfs_nadirop = 0; 1014 fs->lfs_seglock = 0; 1015 fs->lfs_pdflush = 0; 1016 fs->lfs_sleepers = 0; 1017 fs->lfs_pages = 0; 1018 rw_init(&fs->lfs_fraglock); 1019 rw_init(&fs->lfs_iflock); 1020 cv_init(&fs->lfs_stopcv, "lfsstop"); 1021 1022 /* Set the file system readonly/modify bits. */ 1023 fs->lfs_ronly = ronly; 1024 if (ronly == 0) 1025 fs->lfs_fmod = 1; 1026 1027 /* ulfs-level information */ 1028 fs->um_flags = 0; 1029 fs->um_bptrtodb = fs->lfs_ffshift - DEV_BSHIFT; 1030 fs->um_seqinc = fs->lfs_frag; 1031 fs->um_nindir = fs->lfs_nindir; 1032 fs->um_lognindir = ffs(fs->lfs_nindir) - 1; 1033 fs->um_maxsymlinklen = fs->lfs_maxsymlinklen; 1034 fs->um_dirblksiz = LFS_DIRBLKSIZ; 1035 fs->um_maxfilesize = fs->lfs_maxfilesize; 1036 1037 /* quota stuff */ 1038 /* XXX: these need to come from the on-disk superblock to be used */ 1039 fs->lfs_use_quota2 = 0; 1040 fs->lfs_quota_magic = 0; 1041 fs->lfs_quota_flags = 0; 1042 fs->lfs_quotaino[0] = 0; 1043 fs->lfs_quotaino[1] = 0; 1044 1045 /* Initialize the mount structure. */ 1046 dev = devvp->v_rdev; 1047 mp->mnt_data = ump; 1048 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1049 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); 1050 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1051 mp->mnt_stat.f_namemax = LFS_MAXNAMLEN; 1052 mp->mnt_stat.f_iosize = fs->lfs_bsize; 1053 mp->mnt_flag |= MNT_LOCAL; 1054 mp->mnt_fs_bshift = fs->lfs_bshift; 1055 if (fs->um_maxsymlinklen > 0) 1056 mp->mnt_iflag |= IMNT_DTYPE; 1057 1058 ump->um_mountp = mp; 1059 ump->um_dev = dev; 1060 ump->um_devvp = devvp; 1061 for (i = 0; i < ULFS_MAXQUOTAS; i++) 1062 ump->um_quotas[i] = NULLVP; 1063 spec_node_setmountedfs(devvp, mp); 1064 1065 /* Set up reserved memory for pageout */ 1066 lfs_setup_resblks(fs); 1067 /* Set up vdirop tailq */ 1068 TAILQ_INIT(&fs->lfs_dchainhd); 1069 /* and paging tailq */ 1070 TAILQ_INIT(&fs->lfs_pchainhd); 1071 /* and delayed segment accounting for truncation list */ 1072 LIST_INIT(&fs->lfs_segdhd); 1073 1074 /* 1075 * We use the ifile vnode for almost every operation. Instead of 1076 * retrieving it from the hash table each time we retrieve it here, 1077 * artificially increment the reference count and keep a pointer 1078 * to it in the incore copy of the superblock. 1079 */ 1080 if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { 1081 DLOG((DLOG_MOUNT, "lfs_mountfs: ifile vget failed, error=%d\n", error)); 1082 goto out; 1083 } 1084 fs->lfs_ivnode = vp; 1085 vref(vp); 1086 1087 /* Set up inode bitmap and order free list */ 1088 lfs_order_freelist(fs); 1089 1090 /* Set up segment usage flags for the autocleaner. */ 1091 fs->lfs_nactive = 0; 1092 fs->lfs_suflags = (u_int32_t **)malloc(2 * sizeof(u_int32_t *), 1093 M_SEGMENT, M_WAITOK); 1094 fs->lfs_suflags[0] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1095 M_SEGMENT, M_WAITOK); 1096 fs->lfs_suflags[1] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1097 M_SEGMENT, M_WAITOK); 1098 memset(fs->lfs_suflags[1], 0, fs->lfs_nseg * sizeof(u_int32_t)); 1099 for (i = 0; i < fs->lfs_nseg; i++) { 1100 int changed; 1101 1102 LFS_SEGENTRY(sup, fs, i, bp); 1103 changed = 0; 1104 if (!ronly) { 1105 if (sup->su_nbytes == 0 && 1106 !(sup->su_flags & SEGUSE_EMPTY)) { 1107 sup->su_flags |= SEGUSE_EMPTY; 1108 ++changed; 1109 } else if (!(sup->su_nbytes == 0) && 1110 (sup->su_flags & SEGUSE_EMPTY)) { 1111 sup->su_flags &= ~SEGUSE_EMPTY; 1112 ++changed; 1113 } 1114 if (sup->su_flags & (SEGUSE_ACTIVE|SEGUSE_INVAL)) { 1115 sup->su_flags &= ~(SEGUSE_ACTIVE|SEGUSE_INVAL); 1116 ++changed; 1117 } 1118 } 1119 fs->lfs_suflags[0][i] = sup->su_flags; 1120 if (changed) 1121 LFS_WRITESEGENTRY(sup, fs, i, bp); 1122 else 1123 brelse(bp, 0); 1124 } 1125 1126 /* 1127 * XXX: if the fs has quotas, quotas should be on even if 1128 * readonly. Otherwise you can't query the quota info! 1129 * However, that's not how the quota2 code got written and I 1130 * don't know if it'll behave itself if enabled while 1131 * readonly, so for now use the same enable logic as ffs. 1132 * 1133 * XXX: also, if you use the -f behavior allowed here (and 1134 * equivalently above for remount) it will corrupt the fs. It 1135 * ought not to allow that. It should allow mounting readonly 1136 * if there are quotas and the kernel doesn't have the quota 1137 * code, but only readonly. 1138 * 1139 * XXX: and if you use the -f behavior allowed here it will 1140 * likely crash at unmount time (or remount time) because we 1141 * think quotas are active. 1142 * 1143 * Although none of this applies until there's a way to set 1144 * lfs_use_quota2 and have quotas in the fs at all. 1145 */ 1146 if (!ronly && fs->lfs_use_quota2) { 1147 #ifdef LFS_QUOTA2 1148 error = lfs_quota2_mount(mp); 1149 #else 1150 uprintf("%s: no kernel support for this filesystem's quotas\n", 1151 mp->mnt_stat.f_mntonname); 1152 if (mp->mnt_flag & MNT_FORCE) { 1153 uprintf("%s: mounting anyway; fsck afterwards\n", 1154 mp->mnt_stat.f_mntonname); 1155 } else { 1156 error = EINVAL; 1157 } 1158 #endif 1159 if (error) { 1160 /* XXX XXX must clean up the stuff immediately above */ 1161 printf("lfs_mountfs: sorry, leaking some memory\n"); 1162 goto out; 1163 } 1164 } 1165 1166 #ifdef LFS_EXTATTR 1167 /* 1168 * Initialize file-backed extended attributes for ULFS1 file 1169 * systems. 1170 * 1171 * XXX: why is this limited to ULFS1? 1172 */ 1173 if (ump->um_fstype == ULFS1) { 1174 ulfs_extattr_uepm_init(&ump->um_extattr); 1175 } 1176 #endif 1177 1178 #ifdef LFS_KERNEL_RFW 1179 lfs_roll_forward(fs, mp, l); 1180 #endif 1181 1182 /* If writing, sb is not clean; record in case of immediate crash */ 1183 if (!fs->lfs_ronly) { 1184 fs->lfs_pflags &= ~LFS_PF_CLEAN; 1185 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1186 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1187 } 1188 1189 /* Allow vget now that roll-forward is complete */ 1190 fs->lfs_flags &= ~(LFS_NOTYET); 1191 wakeup(&fs->lfs_flags); 1192 1193 /* 1194 * Initialize the ifile cleaner info with information from 1195 * the superblock. 1196 */ 1197 LFS_CLEANERINFO(cip, fs, bp); 1198 cip->clean = fs->lfs_nclean; 1199 cip->dirty = fs->lfs_nseg - fs->lfs_nclean; 1200 cip->avail = fs->lfs_avail; 1201 cip->bfree = fs->lfs_bfree; 1202 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 1203 1204 /* 1205 * Mark the current segment as ACTIVE, since we're going to 1206 * be writing to it. 1207 */ 1208 LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, fs->lfs_offset), bp); 1209 sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; 1210 fs->lfs_nactive++; 1211 LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, fs->lfs_offset), bp); /* Ifile */ 1212 1213 /* Now that roll-forward is done, unlock the Ifile */ 1214 vput(vp); 1215 1216 /* Start the pagedaemon-anticipating daemon */ 1217 mutex_enter(&lfs_lock); 1218 if (lfs_writer_daemon == 0 && lfs_writer_lid == 0 && 1219 kthread_create(PRI_BIO, 0, NULL, 1220 lfs_writerd, NULL, NULL, "lfs_writer") != 0) 1221 panic("fork lfs_writer"); 1222 mutex_exit(&lfs_lock); 1223 1224 printf("WARNING: the log-structured file system is experimental\n" 1225 "WARNING: it may cause system crashes and/or corrupt data\n"); 1226 1227 return (0); 1228 1229 out: 1230 if (bp) 1231 brelse(bp, 0); 1232 if (abp) 1233 brelse(abp, 0); 1234 if (ump) { 1235 kmem_free(ump->um_lfs, sizeof(struct lfs)); 1236 kmem_free(ump, sizeof(*ump)); 1237 mp->mnt_data = NULL; 1238 } 1239 1240 return (error); 1241 } 1242 1243 /* 1244 * unmount system call 1245 */ 1246 int 1247 lfs_unmount(struct mount *mp, int mntflags) 1248 { 1249 struct lwp *l = curlwp; 1250 struct ulfsmount *ump; 1251 struct lfs *fs; 1252 int error, flags, ronly; 1253 vnode_t *vp; 1254 1255 flags = 0; 1256 if (mntflags & MNT_FORCE) 1257 flags |= FORCECLOSE; 1258 1259 ump = VFSTOULFS(mp); 1260 fs = ump->um_lfs; 1261 1262 /* Two checkpoints */ 1263 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1264 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1265 1266 /* wake up the cleaner so it can die */ 1267 /* XXX: shouldn't this be *after* the error cases below? */ 1268 lfs_wakeup_cleaner(fs); 1269 mutex_enter(&lfs_lock); 1270 while (fs->lfs_sleepers) 1271 mtsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers", 0, 1272 &lfs_lock); 1273 mutex_exit(&lfs_lock); 1274 1275 #ifdef LFS_EXTATTR 1276 if (ump->um_fstype == ULFS1) { 1277 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_STARTED) { 1278 ulfs_extattr_stop(mp, curlwp); 1279 } 1280 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_INITIALIZED) { 1281 ulfs_extattr_uepm_destroy(&ump->um_extattr); 1282 } 1283 } 1284 #endif 1285 #ifdef LFS_QUOTA 1286 if ((error = lfsquota1_umount(mp, flags)) != 0) 1287 return (error); 1288 #endif 1289 #ifdef LFS_QUOTA2 1290 if ((error = lfsquota2_umount(mp, flags)) != 0) 1291 return (error); 1292 #endif 1293 if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) 1294 return (error); 1295 if ((error = VFS_SYNC(mp, 1, l->l_cred)) != 0) 1296 return (error); 1297 vp = fs->lfs_ivnode; 1298 mutex_enter(vp->v_interlock); 1299 if (LIST_FIRST(&vp->v_dirtyblkhd)) 1300 panic("lfs_unmount: still dirty blocks on ifile vnode"); 1301 mutex_exit(vp->v_interlock); 1302 1303 /* Explicitly write the superblock, to update serial and pflags */ 1304 fs->lfs_pflags |= LFS_PF_CLEAN; 1305 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1306 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1307 mutex_enter(&lfs_lock); 1308 while (fs->lfs_iocount) 1309 mtsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount", 0, 1310 &lfs_lock); 1311 mutex_exit(&lfs_lock); 1312 1313 /* Finish with the Ifile, now that we're done with it */ 1314 vgone(fs->lfs_ivnode); 1315 1316 ronly = !fs->lfs_ronly; 1317 if (ump->um_devvp->v_type != VBAD) 1318 spec_node_setmountedfs(ump->um_devvp, NULL); 1319 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1320 error = VOP_CLOSE(ump->um_devvp, 1321 ronly ? FREAD : FREAD|FWRITE, NOCRED); 1322 vput(ump->um_devvp); 1323 1324 /* Complain about page leakage */ 1325 if (fs->lfs_pages > 0) 1326 printf("lfs_unmount: still claim %d pages (%d in subsystem)\n", 1327 fs->lfs_pages, lfs_subsys_pages); 1328 1329 /* Free per-mount data structures */ 1330 free(fs->lfs_ino_bitmap, M_SEGMENT); 1331 free(fs->lfs_suflags[0], M_SEGMENT); 1332 free(fs->lfs_suflags[1], M_SEGMENT); 1333 free(fs->lfs_suflags, M_SEGMENT); 1334 lfs_free_resblks(fs); 1335 cv_destroy(&fs->lfs_stopcv); 1336 rw_destroy(&fs->lfs_fraglock); 1337 rw_destroy(&fs->lfs_iflock); 1338 1339 kmem_free(fs, sizeof(struct lfs)); 1340 kmem_free(ump, sizeof(*ump)); 1341 1342 mp->mnt_data = NULL; 1343 mp->mnt_flag &= ~MNT_LOCAL; 1344 return (error); 1345 } 1346 1347 /* 1348 * Get file system statistics. 1349 * 1350 * NB: We don't lock to access the superblock here, because it's not 1351 * really that important if we get it wrong. 1352 */ 1353 int 1354 lfs_statvfs(struct mount *mp, struct statvfs *sbp) 1355 { 1356 struct lfs *fs; 1357 struct ulfsmount *ump; 1358 1359 ump = VFSTOULFS(mp); 1360 fs = ump->um_lfs; 1361 if (fs->lfs_magic != LFS_MAGIC) 1362 panic("lfs_statvfs: magic"); 1363 1364 sbp->f_bsize = fs->lfs_bsize; 1365 sbp->f_frsize = fs->lfs_fsize; 1366 sbp->f_iosize = fs->lfs_bsize; 1367 sbp->f_blocks = LFS_EST_NONMETA(fs) - VTOI(fs->lfs_ivnode)->i_lfs_effnblks; 1368 1369 sbp->f_bfree = LFS_EST_BFREE(fs); 1370 KASSERT(sbp->f_bfree <= fs->lfs_dsize); 1371 #if 0 1372 if (sbp->f_bfree < 0) 1373 sbp->f_bfree = 0; 1374 #endif 1375 1376 sbp->f_bresvd = LFS_EST_RSVD(fs); 1377 if (sbp->f_bfree > sbp->f_bresvd) 1378 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1379 else 1380 sbp->f_bavail = 0; 1381 1382 sbp->f_files = fs->lfs_bfree / lfs_btofsb(fs, fs->lfs_ibsize) 1383 * LFS_INOPB(fs); 1384 sbp->f_ffree = sbp->f_files - fs->lfs_nfiles; 1385 sbp->f_favail = sbp->f_ffree; 1386 sbp->f_fresvd = 0; 1387 copy_statvfs_info(sbp, mp); 1388 return (0); 1389 } 1390 1391 /* 1392 * Go through the disk queues to initiate sandbagged IO; 1393 * go through the inodes to write those that have been modified; 1394 * initiate the writing of the super block if it has been modified. 1395 * 1396 * Note: we are always called with the filesystem marked `MPBUSY'. 1397 */ 1398 int 1399 lfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1400 { 1401 int error; 1402 struct lfs *fs; 1403 1404 fs = VFSTOULFS(mp)->um_lfs; 1405 if (fs->lfs_ronly) 1406 return 0; 1407 1408 /* Snapshots should not hose the syncer */ 1409 /* 1410 * XXX Sync can block here anyway, since we don't have a very 1411 * XXX good idea of how much data is pending. If it's more 1412 * XXX than a segment and lfs_nextseg is close to the end of 1413 * XXX the log, we'll likely block. 1414 */ 1415 mutex_enter(&lfs_lock); 1416 if (fs->lfs_nowrap && fs->lfs_nextseg < fs->lfs_curseg) { 1417 mutex_exit(&lfs_lock); 1418 return 0; 1419 } 1420 mutex_exit(&lfs_lock); 1421 1422 lfs_writer_enter(fs, "lfs_dirops"); 1423 1424 /* All syncs must be checkpoints until roll-forward is implemented. */ 1425 DLOG((DLOG_FLUSH, "lfs_sync at 0x%x\n", fs->lfs_offset)); 1426 error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); 1427 lfs_writer_leave(fs); 1428 #ifdef LFS_QUOTA 1429 lfs_qsync(mp); 1430 #endif 1431 return (error); 1432 } 1433 1434 /* 1435 * Look up an LFS dinode number to find its incore vnode. If not already 1436 * in core, read it in from the specified device. Return the inode locked. 1437 * Detection and handling of mount points must be done by the calling routine. 1438 */ 1439 int 1440 lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1441 { 1442 struct lfs *fs; 1443 struct ulfs1_dinode *dip; 1444 struct inode *ip; 1445 struct buf *bp; 1446 struct ifile *ifp; 1447 struct vnode *vp; 1448 struct ulfsmount *ump; 1449 daddr_t daddr; 1450 dev_t dev; 1451 int error, retries; 1452 struct timespec ts; 1453 1454 memset(&ts, 0, sizeof ts); /* XXX gcc */ 1455 1456 ump = VFSTOULFS(mp); 1457 dev = ump->um_dev; 1458 fs = ump->um_lfs; 1459 1460 /* 1461 * If the filesystem is not completely mounted yet, suspend 1462 * any access requests (wait for roll-forward to complete). 1463 */ 1464 mutex_enter(&lfs_lock); 1465 while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) 1466 mtsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet", 0, 1467 &lfs_lock); 1468 mutex_exit(&lfs_lock); 1469 1470 retry: 1471 if ((*vpp = ulfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1472 return (0); 1473 1474 error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, NULL, &vp); 1475 if (error) { 1476 *vpp = NULL; 1477 return (error); 1478 } 1479 1480 mutex_enter(&ulfs_hashlock); 1481 if (ulfs_ihashget(dev, ino, 0) != NULL) { 1482 mutex_exit(&ulfs_hashlock); 1483 ungetnewvnode(vp); 1484 goto retry; 1485 } 1486 1487 /* Translate the inode number to a disk address. */ 1488 if (ino == LFS_IFILE_INUM) 1489 daddr = fs->lfs_idaddr; 1490 else { 1491 /* XXX bounds-check this too */ 1492 LFS_IENTRY(ifp, fs, ino, bp); 1493 daddr = ifp->if_daddr; 1494 if (fs->lfs_version > 1) { 1495 ts.tv_sec = ifp->if_atime_sec; 1496 ts.tv_nsec = ifp->if_atime_nsec; 1497 } 1498 1499 brelse(bp, 0); 1500 if (daddr == LFS_UNUSED_DADDR) { 1501 *vpp = NULLVP; 1502 mutex_exit(&ulfs_hashlock); 1503 ungetnewvnode(vp); 1504 return (ENOENT); 1505 } 1506 } 1507 1508 /* Allocate/init new vnode/inode. */ 1509 lfs_vcreate(mp, ino, vp); 1510 1511 /* 1512 * Put it onto its hash chain and lock it so that other requests for 1513 * this inode will block if they arrive while we are sleeping waiting 1514 * for old data structures to be purged or for the contents of the 1515 * disk portion of this inode to be read. 1516 */ 1517 ip = VTOI(vp); 1518 ulfs_ihashins(ip); 1519 mutex_exit(&ulfs_hashlock); 1520 1521 /* 1522 * XXX 1523 * This may not need to be here, logically it should go down with 1524 * the i_devvp initialization. 1525 * Ask Kirk. 1526 */ 1527 ip->i_lfs = ump->um_lfs; 1528 1529 /* Read in the disk contents for the inode, copy into the inode. */ 1530 retries = 0; 1531 again: 1532 error = bread(ump->um_devvp, LFS_FSBTODB(fs, daddr), 1533 (fs->lfs_version == 1 ? fs->lfs_bsize : fs->lfs_ibsize), 1534 NOCRED, 0, &bp); 1535 if (error) { 1536 /* 1537 * The inode does not contain anything useful, so it would 1538 * be misleading to leave it on its hash chain. With mode 1539 * still zero, it will be unlinked and returned to the free 1540 * list by vput(). 1541 */ 1542 vput(vp); 1543 *vpp = NULL; 1544 return (error); 1545 } 1546 1547 dip = lfs_ifind(fs, ino, bp); 1548 if (dip == NULL) { 1549 /* Assume write has not completed yet; try again */ 1550 brelse(bp, BC_INVAL); 1551 ++retries; 1552 if (retries > LFS_IFIND_RETRIES) { 1553 #ifdef DEBUG 1554 /* If the seglock is held look at the bpp to see 1555 what is there anyway */ 1556 mutex_enter(&lfs_lock); 1557 if (fs->lfs_seglock > 0) { 1558 struct buf **bpp; 1559 struct ulfs1_dinode *dp; 1560 int i; 1561 1562 for (bpp = fs->lfs_sp->bpp; 1563 bpp != fs->lfs_sp->cbpp; ++bpp) { 1564 if ((*bpp)->b_vp == fs->lfs_ivnode && 1565 bpp != fs->lfs_sp->bpp) { 1566 /* Inode block */ 1567 printf("lfs_vget: block 0x%" PRIx64 ": ", 1568 (*bpp)->b_blkno); 1569 dp = (struct ulfs1_dinode *)(*bpp)->b_data; 1570 for (i = 0; i < LFS_INOPB(fs); i++) 1571 if (dp[i].di_inumber) 1572 printf("%d ", dp[i].di_inumber); 1573 printf("\n"); 1574 } 1575 } 1576 } 1577 mutex_exit(&lfs_lock); 1578 #endif /* DEBUG */ 1579 panic("lfs_vget: dinode not found"); 1580 } 1581 mutex_enter(&lfs_lock); 1582 if (fs->lfs_iocount) { 1583 DLOG((DLOG_VNODE, "lfs_vget: dinode %d not found, retrying...\n", ino)); 1584 (void)mtsleep(&fs->lfs_iocount, PRIBIO + 1, 1585 "lfs ifind", 1, &lfs_lock); 1586 } else 1587 retries = LFS_IFIND_RETRIES; 1588 mutex_exit(&lfs_lock); 1589 goto again; 1590 } 1591 *ip->i_din.ffs1_din = *dip; 1592 brelse(bp, 0); 1593 1594 if (fs->lfs_version > 1) { 1595 ip->i_ffs1_atime = ts.tv_sec; 1596 ip->i_ffs1_atimensec = ts.tv_nsec; 1597 } 1598 1599 lfs_vinit(mp, &vp); 1600 1601 *vpp = vp; 1602 1603 KASSERT(VOP_ISLOCKED(vp)); 1604 1605 return (0); 1606 } 1607 1608 /* 1609 * File handle to vnode 1610 */ 1611 int 1612 lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1613 { 1614 struct lfid lfh; 1615 struct buf *bp; 1616 IFILE *ifp; 1617 int32_t daddr; 1618 struct lfs *fs; 1619 vnode_t *vp; 1620 1621 if (fhp->fid_len != sizeof(struct lfid)) 1622 return EINVAL; 1623 1624 memcpy(&lfh, fhp, sizeof(lfh)); 1625 if (lfh.lfid_ino < LFS_IFILE_INUM) 1626 return ESTALE; 1627 1628 fs = VFSTOULFS(mp)->um_lfs; 1629 if (lfh.lfid_ident != fs->lfs_ident) 1630 return ESTALE; 1631 1632 if (lfh.lfid_ino > 1633 ((VTOI(fs->lfs_ivnode)->i_ffs1_size >> fs->lfs_bshift) - 1634 fs->lfs_cleansz - fs->lfs_segtabsz) * fs->lfs_ifpb) 1635 return ESTALE; 1636 1637 mutex_enter(&ulfs_ihash_lock); 1638 vp = ulfs_ihashlookup(VFSTOULFS(mp)->um_dev, lfh.lfid_ino); 1639 mutex_exit(&ulfs_ihash_lock); 1640 if (vp == NULL) { 1641 LFS_IENTRY(ifp, fs, lfh.lfid_ino, bp); 1642 daddr = ifp->if_daddr; 1643 brelse(bp, 0); 1644 if (daddr == LFS_UNUSED_DADDR) 1645 return ESTALE; 1646 } 1647 1648 return (ulfs_fhtovp(mp, &lfh.lfid_ufid, vpp)); 1649 } 1650 1651 /* 1652 * Vnode pointer to File handle 1653 */ 1654 /* ARGSUSED */ 1655 int 1656 lfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1657 { 1658 struct inode *ip; 1659 struct lfid lfh; 1660 1661 if (*fh_size < sizeof(struct lfid)) { 1662 *fh_size = sizeof(struct lfid); 1663 return E2BIG; 1664 } 1665 *fh_size = sizeof(struct lfid); 1666 ip = VTOI(vp); 1667 memset(&lfh, 0, sizeof(lfh)); 1668 lfh.lfid_len = sizeof(struct lfid); 1669 lfh.lfid_ino = ip->i_number; 1670 lfh.lfid_gen = ip->i_gen; 1671 lfh.lfid_ident = ip->i_lfs->lfs_ident; 1672 memcpy(fhp, &lfh, sizeof(lfh)); 1673 return (0); 1674 } 1675 1676 /* 1677 * ulfs_bmaparray callback function for writing. 1678 * 1679 * Since blocks will be written to the new segment anyway, 1680 * we don't care about current daddr of them. 1681 */ 1682 static bool 1683 lfs_issequential_hole(const struct lfs *fs, 1684 daddr_t daddr0, daddr_t daddr1) 1685 { 1686 (void)fs; /* not used */ 1687 1688 daddr0 = (daddr_t)((int32_t)daddr0); /* XXX ondisk32 */ 1689 daddr1 = (daddr_t)((int32_t)daddr1); /* XXX ondisk32 */ 1690 1691 KASSERT(daddr0 == UNWRITTEN || 1692 (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR)); 1693 KASSERT(daddr1 == UNWRITTEN || 1694 (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR)); 1695 1696 /* NOTE: all we want to know here is 'hole or not'. */ 1697 /* NOTE: UNASSIGNED is converted to 0 by ulfs_bmaparray. */ 1698 1699 /* 1700 * treat UNWRITTENs and all resident blocks as 'contiguous' 1701 */ 1702 if (daddr0 != 0 && daddr1 != 0) 1703 return true; 1704 1705 /* 1706 * both are in hole? 1707 */ 1708 if (daddr0 == 0 && daddr1 == 0) 1709 return true; /* all holes are 'contiguous' for us. */ 1710 1711 return false; 1712 } 1713 1714 /* 1715 * lfs_gop_write functions exactly like genfs_gop_write, except that 1716 * (1) it requires the seglock to be held by its caller, and sp->fip 1717 * to be properly initialized (it will return without re-initializing 1718 * sp->fip, and without calling lfs_writeseg). 1719 * (2) it uses the remaining space in the segment, rather than VOP_BMAP, 1720 * to determine how large a block it can write at once (though it does 1721 * still use VOP_BMAP to find holes in the file); 1722 * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks 1723 * (leaving lfs_writeseg to deal with the cluster blocks, so we might 1724 * now have clusters of clusters, ick.) 1725 */ 1726 static int 1727 lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, 1728 int flags) 1729 { 1730 int i, error, run, haveeof = 0; 1731 int fs_bshift; 1732 vaddr_t kva; 1733 off_t eof, offset, startoffset = 0; 1734 size_t bytes, iobytes, skipbytes; 1735 bool async = (flags & PGO_SYNCIO) == 0; 1736 daddr_t lbn, blkno; 1737 struct vm_page *pg; 1738 struct buf *mbp, *bp; 1739 struct vnode *devvp = VTOI(vp)->i_devvp; 1740 struct inode *ip = VTOI(vp); 1741 struct lfs *fs = ip->i_lfs; 1742 struct segment *sp = fs->lfs_sp; 1743 UVMHIST_FUNC("lfs_gop_write"); UVMHIST_CALLED(ubchist); 1744 const char * failreason = NULL; 1745 1746 ASSERT_SEGLOCK(fs); 1747 1748 /* The Ifile lives in the buffer cache */ 1749 KASSERT(vp != fs->lfs_ivnode); 1750 1751 /* 1752 * We don't want to fill the disk before the cleaner has a chance 1753 * to make room for us. If we're in danger of doing that, fail 1754 * with EAGAIN. The caller will have to notice this, unlock 1755 * so the cleaner can run, relock and try again. 1756 * 1757 * We must write everything, however, if our vnode is being 1758 * reclaimed. 1759 */ 1760 mutex_enter(vp->v_interlock); 1761 if (LFS_STARVED_FOR_SEGS(fs) && vdead_check(vp, VDEAD_NOWAIT) == 0) { 1762 mutex_exit(vp->v_interlock); 1763 failreason = "Starved for segs and not flushing vp"; 1764 goto tryagain; 1765 } 1766 mutex_exit(vp->v_interlock); 1767 1768 /* 1769 * Sometimes things slip past the filters in lfs_putpages, 1770 * and the pagedaemon tries to write pages---problem is 1771 * that the pagedaemon never acquires the segment lock. 1772 * 1773 * Alternatively, pages that were clean when we called 1774 * genfs_putpages may have become dirty in the meantime. In this 1775 * case the segment header is not properly set up for blocks 1776 * to be added to it. 1777 * 1778 * Unbusy and unclean the pages, and put them on the ACTIVE 1779 * queue under the hypothesis that they couldn't have got here 1780 * unless they were modified *quite* recently. 1781 * 1782 * XXXUBC that last statement is an oversimplification of course. 1783 */ 1784 if (!LFS_SEGLOCK_HELD(fs)) { 1785 failreason = "Seglock not held"; 1786 goto tryagain; 1787 } 1788 if (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) { 1789 failreason = "Inode with no_gop_write"; 1790 goto tryagain; 1791 } 1792 if ((pgs[0]->offset & fs->lfs_bmask) != 0) { 1793 failreason = "Bad page offset"; 1794 goto tryagain; 1795 } 1796 1797 UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x", 1798 vp, pgs, npages, flags); 1799 1800 GOP_SIZE(vp, vp->v_size, &eof, 0); 1801 haveeof = 1; 1802 1803 if (vp->v_type == VREG) 1804 fs_bshift = vp->v_mount->mnt_fs_bshift; 1805 else 1806 fs_bshift = DEV_BSHIFT; 1807 error = 0; 1808 pg = pgs[0]; 1809 startoffset = pg->offset; 1810 KASSERT(eof >= 0); 1811 1812 if (startoffset >= eof) { 1813 failreason = "Offset beyond EOF"; 1814 goto tryagain; 1815 } else 1816 bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); 1817 skipbytes = 0; 1818 1819 KASSERT(bytes != 0); 1820 1821 /* Swap PG_DELWRI for PG_PAGEOUT */ 1822 for (i = 0; i < npages; i++) { 1823 if (pgs[i]->flags & PG_DELWRI) { 1824 KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); 1825 pgs[i]->flags &= ~PG_DELWRI; 1826 pgs[i]->flags |= PG_PAGEOUT; 1827 uvm_pageout_start(1); 1828 mutex_enter(vp->v_interlock); 1829 mutex_enter(&uvm_pageqlock); 1830 uvm_pageunwire(pgs[i]); 1831 mutex_exit(&uvm_pageqlock); 1832 mutex_exit(vp->v_interlock); 1833 } 1834 } 1835 1836 /* 1837 * Check to make sure we're starting on a block boundary. 1838 * We'll check later to make sure we always write entire 1839 * blocks (or fragments). 1840 */ 1841 if (startoffset & fs->lfs_bmask) 1842 printf("%" PRId64 " & %" PRId64 " = %" PRId64 "\n", 1843 startoffset, fs->lfs_bmask, 1844 startoffset & fs->lfs_bmask); 1845 KASSERT((startoffset & fs->lfs_bmask) == 0); 1846 if (bytes & fs->lfs_ffmask) { 1847 printf("lfs_gop_write: asked to write %ld bytes\n", (long)bytes); 1848 panic("lfs_gop_write: non-integer blocks"); 1849 } 1850 1851 /* 1852 * We could deadlock here on pager_map with UVMPAGER_MAPIN_WAITOK. 1853 * If we would, write what we have and try again. If we don't 1854 * have anything to write, we'll have to sleep. 1855 */ 1856 if ((kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 1857 (((SEGSUM *)(sp->segsum))->ss_nfinfo < 1 ? 1858 UVMPAGER_MAPIN_WAITOK : 0))) == 0x0) { 1859 DLOG((DLOG_PAGE, "lfs_gop_write: forcing write\n")); 1860 #if 0 1861 " with nfinfo=%d at offset 0x%x\n", 1862 (int)((SEGSUM *)(sp->segsum))->ss_nfinfo, 1863 (unsigned)fs->lfs_offset)); 1864 #endif 1865 lfs_updatemeta(sp); 1866 lfs_release_finfo(fs); 1867 (void) lfs_writeseg(fs, sp); 1868 1869 lfs_acquire_finfo(fs, ip->i_number, ip->i_gen); 1870 1871 /* 1872 * Having given up all of the pager_map we were holding, 1873 * we can now wait for aiodoned to reclaim it for us 1874 * without fear of deadlock. 1875 */ 1876 kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 1877 UVMPAGER_MAPIN_WAITOK); 1878 } 1879 1880 mbp = getiobuf(NULL, true); 1881 UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x", 1882 vp, mbp, vp->v_numoutput, bytes); 1883 mbp->b_bufsize = npages << PAGE_SHIFT; 1884 mbp->b_data = (void *)kva; 1885 mbp->b_resid = mbp->b_bcount = bytes; 1886 mbp->b_cflags = BC_BUSY|BC_AGE; 1887 mbp->b_iodone = uvm_aio_biodone; 1888 1889 bp = NULL; 1890 for (offset = startoffset; 1891 bytes > 0; 1892 offset += iobytes, bytes -= iobytes) { 1893 lbn = offset >> fs_bshift; 1894 error = ulfs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, 1895 lfs_issequential_hole); 1896 if (error) { 1897 UVMHIST_LOG(ubchist, "ulfs_bmaparray() -> %d", 1898 error,0,0,0); 1899 skipbytes += bytes; 1900 bytes = 0; 1901 break; 1902 } 1903 1904 iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, 1905 bytes); 1906 if (blkno == (daddr_t)-1) { 1907 skipbytes += iobytes; 1908 continue; 1909 } 1910 1911 /* 1912 * Discover how much we can really pack into this buffer. 1913 */ 1914 /* If no room in the current segment, finish it up */ 1915 if (sp->sum_bytes_left < sizeof(int32_t) || 1916 sp->seg_bytes_left < (1 << fs->lfs_bshift)) { 1917 int vers; 1918 1919 lfs_updatemeta(sp); 1920 vers = sp->fip->fi_version; 1921 lfs_release_finfo(fs); 1922 (void) lfs_writeseg(fs, sp); 1923 1924 lfs_acquire_finfo(fs, ip->i_number, vers); 1925 } 1926 /* Check both for space in segment and space in segsum */ 1927 iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) 1928 << fs_bshift); 1929 iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) 1930 << fs_bshift); 1931 KASSERT(iobytes > 0); 1932 1933 /* if it's really one i/o, don't make a second buf */ 1934 if (offset == startoffset && iobytes == bytes) { 1935 bp = mbp; 1936 /* 1937 * All the LFS output is done by the segwriter. It 1938 * will increment numoutput by one for all the bufs it 1939 * recieves. However this buffer needs one extra to 1940 * account for aiodone. 1941 */ 1942 mutex_enter(vp->v_interlock); 1943 vp->v_numoutput++; 1944 mutex_exit(vp->v_interlock); 1945 } else { 1946 bp = getiobuf(NULL, true); 1947 UVMHIST_LOG(ubchist, "vp %p bp %p num now %d", 1948 vp, bp, vp->v_numoutput, 0); 1949 nestiobuf_setup(mbp, bp, offset - pg->offset, iobytes); 1950 /* 1951 * LFS doesn't like async I/O here, dies with 1952 * an assert in lfs_bwrite(). Is that assert 1953 * valid? I retained non-async behaviour when 1954 * converted this to use nestiobuf --pooka 1955 */ 1956 bp->b_flags &= ~B_ASYNC; 1957 } 1958 1959 /* XXX This is silly ... is this necessary? */ 1960 mutex_enter(&bufcache_lock); 1961 mutex_enter(vp->v_interlock); 1962 bgetvp(vp, bp); 1963 mutex_exit(vp->v_interlock); 1964 mutex_exit(&bufcache_lock); 1965 1966 bp->b_lblkno = lfs_lblkno(fs, offset); 1967 bp->b_private = mbp; 1968 if (devvp->v_type == VBLK) { 1969 bp->b_dev = devvp->v_rdev; 1970 } 1971 VOP_BWRITE(bp->b_vp, bp); 1972 while (lfs_gatherblock(sp, bp, NULL)) 1973 continue; 1974 } 1975 1976 nestiobuf_done(mbp, skipbytes, error); 1977 if (skipbytes) { 1978 UVMHIST_LOG(ubchist, "skipbytes %d", skipbytes, 0,0,0); 1979 } 1980 UVMHIST_LOG(ubchist, "returning 0", 0,0,0,0); 1981 1982 if (!async) { 1983 /* Start a segment write. */ 1984 UVMHIST_LOG(ubchist, "flushing", 0,0,0,0); 1985 mutex_enter(&lfs_lock); 1986 lfs_flush(fs, 0, 1); 1987 mutex_exit(&lfs_lock); 1988 } 1989 1990 if ((sp->seg_flags & SEGM_SINGLE) && fs->lfs_curseg != fs->lfs_startseg) 1991 return EAGAIN; 1992 1993 return (0); 1994 1995 tryagain: 1996 /* 1997 * We can't write the pages, for whatever reason. 1998 * Clean up after ourselves, and make the caller try again. 1999 */ 2000 mutex_enter(vp->v_interlock); 2001 2002 /* Tell why we're here, if we know */ 2003 if (failreason != NULL) { 2004 DLOG((DLOG_PAGE, "lfs_gop_write: %s\n", failreason)); 2005 } 2006 if (haveeof && startoffset >= eof) { 2007 DLOG((DLOG_PAGE, "lfs_gop_write: ino %d start 0x%" PRIx64 2008 " eof 0x%" PRIx64 " npages=%d\n", VTOI(vp)->i_number, 2009 pgs[0]->offset, eof, npages)); 2010 } 2011 2012 mutex_enter(&uvm_pageqlock); 2013 for (i = 0; i < npages; i++) { 2014 pg = pgs[i]; 2015 2016 if (pg->flags & PG_PAGEOUT) 2017 uvm_pageout_done(1); 2018 if (pg->flags & PG_DELWRI) { 2019 uvm_pageunwire(pg); 2020 } 2021 uvm_pageactivate(pg); 2022 pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); 2023 DLOG((DLOG_PAGE, "pg[%d] = %p (vp %p off %" PRIx64 ")\n", i, pg, 2024 vp, pg->offset)); 2025 DLOG((DLOG_PAGE, "pg[%d]->flags = %x\n", i, pg->flags)); 2026 DLOG((DLOG_PAGE, "pg[%d]->pqflags = %x\n", i, pg->pqflags)); 2027 DLOG((DLOG_PAGE, "pg[%d]->uanon = %p\n", i, pg->uanon)); 2028 DLOG((DLOG_PAGE, "pg[%d]->uobject = %p\n", i, pg->uobject)); 2029 DLOG((DLOG_PAGE, "pg[%d]->wire_count = %d\n", i, 2030 pg->wire_count)); 2031 DLOG((DLOG_PAGE, "pg[%d]->loan_count = %d\n", i, 2032 pg->loan_count)); 2033 } 2034 /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ 2035 uvm_page_unbusy(pgs, npages); 2036 mutex_exit(&uvm_pageqlock); 2037 mutex_exit(vp->v_interlock); 2038 return EAGAIN; 2039 } 2040 2041 /* 2042 * finish vnode/inode initialization. 2043 * used by lfs_vget and lfs_fastvget. 2044 */ 2045 void 2046 lfs_vinit(struct mount *mp, struct vnode **vpp) 2047 { 2048 struct vnode *vp = *vpp; 2049 struct inode *ip = VTOI(vp); 2050 struct ulfsmount *ump = VFSTOULFS(mp); 2051 struct lfs *fs = ump->um_lfs; 2052 int i; 2053 2054 ip->i_mode = ip->i_ffs1_mode; 2055 ip->i_nlink = ip->i_ffs1_nlink; 2056 ip->i_lfs_osize = ip->i_size = ip->i_ffs1_size; 2057 ip->i_flags = ip->i_ffs1_flags; 2058 ip->i_gen = ip->i_ffs1_gen; 2059 ip->i_uid = ip->i_ffs1_uid; 2060 ip->i_gid = ip->i_ffs1_gid; 2061 2062 ip->i_lfs_effnblks = ip->i_ffs1_blocks; 2063 ip->i_lfs_odnlink = ip->i_ffs1_nlink; 2064 2065 /* 2066 * Initialize the vnode from the inode, check for aliases. In all 2067 * cases re-init ip, the underlying vnode/inode may have changed. 2068 */ 2069 ulfs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); 2070 ip = VTOI(vp); 2071 2072 memset(ip->i_lfs_fragsize, 0, ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); 2073 if (vp->v_type != VLNK || ip->i_size >= ip->i_lfs->um_maxsymlinklen) { 2074 #ifdef DEBUG 2075 for (i = (ip->i_size + fs->lfs_bsize - 1) >> fs->lfs_bshift; 2076 i < ULFS_NDADDR; i++) { 2077 if ((vp->v_type == VBLK || vp->v_type == VCHR) && 2078 i == 0) 2079 continue; 2080 if (ip->i_ffs1_db[i] != 0) { 2081 lfs_dump_dinode(ip->i_din.ffs1_din); 2082 panic("inconsistent inode (direct)"); 2083 } 2084 } 2085 for ( ; i < ULFS_NDADDR + ULFS_NIADDR; i++) { 2086 if (ip->i_ffs1_ib[i - ULFS_NDADDR] != 0) { 2087 lfs_dump_dinode(ip->i_din.ffs1_din); 2088 panic("inconsistent inode (indirect)"); 2089 } 2090 } 2091 #endif /* DEBUG */ 2092 for (i = 0; i < ULFS_NDADDR; i++) 2093 if (ip->i_ffs1_db[i] != 0) 2094 ip->i_lfs_fragsize[i] = lfs_blksize(fs, ip, i); 2095 } 2096 2097 #ifdef DIAGNOSTIC 2098 if (vp->v_type == VNON) { 2099 # ifdef DEBUG 2100 lfs_dump_dinode(ip->i_din.ffs1_din); 2101 # endif 2102 panic("lfs_vinit: ino %llu is type VNON! (ifmt=%o)\n", 2103 (unsigned long long)ip->i_number, 2104 (ip->i_mode & LFS_IFMT) >> 12); 2105 } 2106 #endif /* DIAGNOSTIC */ 2107 2108 /* 2109 * Finish inode initialization now that aliasing has been resolved. 2110 */ 2111 2112 ip->i_devvp = ump->um_devvp; 2113 vref(ip->i_devvp); 2114 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 2115 ulfsquota_init(ip); 2116 #endif 2117 genfs_node_init(vp, &lfs_genfsops); 2118 uvm_vnp_setsize(vp, ip->i_size); 2119 2120 /* Initialize hiblk from file size */ 2121 ip->i_lfs_hiblk = lfs_lblkno(ip->i_lfs, ip->i_size + ip->i_lfs->lfs_bsize - 1) - 1; 2122 2123 *vpp = vp; 2124 } 2125 2126 /* 2127 * Resize the filesystem to contain the specified number of segments. 2128 */ 2129 int 2130 lfs_resize_fs(struct lfs *fs, int newnsegs) 2131 { 2132 SEGUSE *sup; 2133 struct buf *bp, *obp; 2134 daddr_t olast, nlast, ilast, noff, start, end; 2135 struct vnode *ivp; 2136 struct inode *ip; 2137 int error, badnews, inc, oldnsegs; 2138 int sbbytes, csbbytes, gain, cgain; 2139 int i; 2140 2141 /* Only support v2 and up */ 2142 if (fs->lfs_version < 2) 2143 return EOPNOTSUPP; 2144 2145 /* If we're doing nothing, do it fast */ 2146 oldnsegs = fs->lfs_nseg; 2147 if (newnsegs == oldnsegs) 2148 return 0; 2149 2150 /* We always have to have two superblocks */ 2151 if (newnsegs <= lfs_dtosn(fs, fs->lfs_sboffs[1])) 2152 return EFBIG; 2153 2154 ivp = fs->lfs_ivnode; 2155 ip = VTOI(ivp); 2156 error = 0; 2157 2158 /* Take the segment lock so no one else calls lfs_newseg() */ 2159 lfs_seglock(fs, SEGM_PROT); 2160 2161 /* 2162 * Make sure the segments we're going to be losing, if any, 2163 * are in fact empty. We hold the seglock, so their status 2164 * cannot change underneath us. Count the superblocks we lose, 2165 * while we're at it. 2166 */ 2167 sbbytes = csbbytes = 0; 2168 cgain = 0; 2169 for (i = newnsegs; i < oldnsegs; i++) { 2170 LFS_SEGENTRY(sup, fs, i, bp); 2171 badnews = sup->su_nbytes || !(sup->su_flags & SEGUSE_INVAL); 2172 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2173 sbbytes += LFS_SBPAD; 2174 if (!(sup->su_flags & SEGUSE_DIRTY)) { 2175 ++cgain; 2176 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2177 csbbytes += LFS_SBPAD; 2178 } 2179 brelse(bp, 0); 2180 if (badnews) { 2181 error = EBUSY; 2182 goto out; 2183 } 2184 } 2185 2186 /* Note old and new segment table endpoints, and old ifile size */ 2187 olast = fs->lfs_cleansz + fs->lfs_segtabsz; 2188 nlast = howmany(newnsegs, fs->lfs_sepb) + fs->lfs_cleansz; 2189 ilast = ivp->v_size >> fs->lfs_bshift; 2190 noff = nlast - olast; 2191 2192 /* 2193 * Make sure no one can use the Ifile while we change it around. 2194 * Even after taking the iflock we need to make sure no one still 2195 * is holding Ifile buffers, so we get each one, to drain them. 2196 * (XXX this could be done better.) 2197 */ 2198 rw_enter(&fs->lfs_iflock, RW_WRITER); 2199 for (i = 0; i < ilast; i++) { 2200 /* XXX what to do if bread fails? */ 2201 bread(ivp, i, fs->lfs_bsize, NOCRED, 0, &bp); 2202 brelse(bp, 0); 2203 } 2204 2205 /* Allocate new Ifile blocks */ 2206 for (i = ilast; i < ilast + noff; i++) { 2207 if (lfs_balloc(ivp, i * fs->lfs_bsize, fs->lfs_bsize, NOCRED, 0, 2208 &bp) != 0) 2209 panic("balloc extending ifile"); 2210 memset(bp->b_data, 0, fs->lfs_bsize); 2211 VOP_BWRITE(bp->b_vp, bp); 2212 } 2213 2214 /* Register new ifile size */ 2215 ip->i_size += noff * fs->lfs_bsize; 2216 ip->i_ffs1_size = ip->i_size; 2217 uvm_vnp_setsize(ivp, ip->i_size); 2218 2219 /* Copy the inode table to its new position */ 2220 if (noff != 0) { 2221 if (noff < 0) { 2222 start = nlast; 2223 end = ilast + noff; 2224 inc = 1; 2225 } else { 2226 start = ilast + noff - 1; 2227 end = nlast - 1; 2228 inc = -1; 2229 } 2230 for (i = start; i != end; i += inc) { 2231 if (bread(ivp, i, fs->lfs_bsize, NOCRED, 2232 B_MODIFY, &bp) != 0) 2233 panic("resize: bread dst blk failed"); 2234 if (bread(ivp, i - noff, fs->lfs_bsize, 2235 NOCRED, 0, &obp)) 2236 panic("resize: bread src blk failed"); 2237 memcpy(bp->b_data, obp->b_data, fs->lfs_bsize); 2238 VOP_BWRITE(bp->b_vp, bp); 2239 brelse(obp, 0); 2240 } 2241 } 2242 2243 /* If we are expanding, write the new empty SEGUSE entries */ 2244 if (newnsegs > oldnsegs) { 2245 for (i = oldnsegs; i < newnsegs; i++) { 2246 if ((error = bread(ivp, i / fs->lfs_sepb + 2247 fs->lfs_cleansz, fs->lfs_bsize, 2248 NOCRED, B_MODIFY, &bp)) != 0) 2249 panic("lfs: ifile read: %d", error); 2250 while ((i + 1) % fs->lfs_sepb && i < newnsegs) { 2251 sup = &((SEGUSE *)bp->b_data)[i % fs->lfs_sepb]; 2252 memset(sup, 0, sizeof(*sup)); 2253 i++; 2254 } 2255 VOP_BWRITE(bp->b_vp, bp); 2256 } 2257 } 2258 2259 /* Zero out unused superblock offsets */ 2260 for (i = 2; i < LFS_MAXNUMSB; i++) 2261 if (lfs_dtosn(fs, fs->lfs_sboffs[i]) >= newnsegs) 2262 fs->lfs_sboffs[i] = 0x0; 2263 2264 /* 2265 * Correct superblock entries that depend on fs size. 2266 * The computations of these are as follows: 2267 * 2268 * size = lfs_segtod(fs, nseg) 2269 * dsize = lfs_segtod(fs, nseg - minfreeseg) - lfs_btofsb(#super * LFS_SBPAD) 2270 * bfree = dsize - lfs_btofsb(fs, bsize * nseg / 2) - blocks_actually_used 2271 * avail = lfs_segtod(fs, nclean) - lfs_btofsb(#clean_super * LFS_SBPAD) 2272 * + (lfs_segtod(fs, 1) - (offset - curseg)) 2273 * - lfs_segtod(fs, minfreeseg - (minfreeseg / 2)) 2274 * 2275 * XXX - we should probably adjust minfreeseg as well. 2276 */ 2277 gain = (newnsegs - oldnsegs); 2278 fs->lfs_nseg = newnsegs; 2279 fs->lfs_segtabsz = nlast - fs->lfs_cleansz; 2280 fs->lfs_size += gain * lfs_btofsb(fs, fs->lfs_ssize); 2281 fs->lfs_dsize += gain * lfs_btofsb(fs, fs->lfs_ssize) - lfs_btofsb(fs, sbbytes); 2282 fs->lfs_bfree += gain * lfs_btofsb(fs, fs->lfs_ssize) - lfs_btofsb(fs, sbbytes) 2283 - gain * lfs_btofsb(fs, fs->lfs_bsize / 2); 2284 if (gain > 0) { 2285 fs->lfs_nclean += gain; 2286 fs->lfs_avail += gain * lfs_btofsb(fs, fs->lfs_ssize); 2287 } else { 2288 fs->lfs_nclean -= cgain; 2289 fs->lfs_avail -= cgain * lfs_btofsb(fs, fs->lfs_ssize) - 2290 lfs_btofsb(fs, csbbytes); 2291 } 2292 2293 /* Resize segment flag cache */ 2294 fs->lfs_suflags[0] = realloc(fs->lfs_suflags[0], 2295 fs->lfs_nseg * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2296 fs->lfs_suflags[1] = realloc(fs->lfs_suflags[1], 2297 fs->lfs_nseg * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2298 for (i = oldnsegs; i < newnsegs; i++) 2299 fs->lfs_suflags[0][i] = fs->lfs_suflags[1][i] = 0x0; 2300 2301 /* Truncate Ifile if necessary */ 2302 if (noff < 0) 2303 lfs_truncate(ivp, ivp->v_size + (noff << fs->lfs_bshift), 0, 2304 NOCRED); 2305 2306 /* Update cleaner info so the cleaner can die */ 2307 /* XXX what to do if bread fails? */ 2308 bread(ivp, 0, fs->lfs_bsize, NOCRED, B_MODIFY, &bp); 2309 ((CLEANERINFO *)bp->b_data)->clean = fs->lfs_nclean; 2310 ((CLEANERINFO *)bp->b_data)->dirty = fs->lfs_nseg - fs->lfs_nclean; 2311 VOP_BWRITE(bp->b_vp, bp); 2312 2313 /* Let Ifile accesses proceed */ 2314 rw_exit(&fs->lfs_iflock); 2315 2316 out: 2317 lfs_segunlock(fs); 2318 return error; 2319 } 2320 2321 /* 2322 * Extended attribute dispatch 2323 */ 2324 static int 2325 lfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2326 int attrnamespace, const char *attrname) 2327 { 2328 #ifdef LFS_EXTATTR 2329 struct ulfsmount *ump; 2330 2331 ump = VFSTOULFS(mp); 2332 if (ump->um_fstype == ULFS1) { 2333 return ulfs_extattrctl(mp, cmd, vp, attrnamespace, attrname); 2334 } 2335 #endif 2336 return vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname); 2337 } 2338