1 /* $NetBSD: lfs_vfsops.c,v 1.313 2013/07/28 01:26:13 dholland 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 1.313 2013/07/28 01:26:13 dholland 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 MOUNT_LFS, 147 sizeof (struct ulfs_args), 148 lfs_mount, 149 ulfs_start, 150 lfs_unmount, 151 ulfs_root, 152 ulfs_quotactl, 153 lfs_statvfs, 154 lfs_sync, 155 lfs_vget, 156 lfs_fhtovp, 157 lfs_vptofh, 158 lfs_init, 159 lfs_reinit, 160 lfs_done, 161 lfs_mountroot, 162 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 163 lfs_extattrctl, 164 (void *)eopnotsupp, /* vfs_suspendctl */ 165 genfs_renamelock_enter, 166 genfs_renamelock_exit, 167 (void *)eopnotsupp, 168 lfs_vnodeopv_descs, 169 0, 170 { NULL, NULL }, 171 }; 172 173 const struct genfs_ops lfs_genfsops = { 174 .gop_size = lfs_gop_size, 175 .gop_alloc = ulfs_gop_alloc, 176 .gop_write = lfs_gop_write, 177 .gop_markupdate = ulfs_gop_markupdate, 178 }; 179 180 struct shortlong { 181 const char *sname; 182 const char *lname; 183 }; 184 185 static int 186 sysctl_lfs_dostats(SYSCTLFN_ARGS) 187 { 188 extern struct lfs_stats lfs_stats; 189 extern int lfs_dostats; 190 int error; 191 192 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 193 if (error || newp == NULL) 194 return (error); 195 196 if (lfs_dostats == 0) 197 memset(&lfs_stats, 0, sizeof(lfs_stats)); 198 199 return (0); 200 } 201 202 static void 203 lfs_sysctl_setup(struct sysctllog **clog) 204 { 205 int i; 206 extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead, 207 lfs_fs_pagetrip, lfs_ignore_lazy_sync; 208 #ifdef DEBUG 209 extern int lfs_debug_log_subsys[DLOG_MAX]; 210 struct shortlong dlog_names[DLOG_MAX] = { /* Must match lfs.h ! */ 211 { "rollforward", "Debug roll-forward code" }, 212 { "alloc", "Debug inode allocation and free list" }, 213 { "avail", "Debug space-available-now accounting" }, 214 { "flush", "Debug flush triggers" }, 215 { "lockedlist", "Debug locked list accounting" }, 216 { "vnode_verbose", "Verbose per-vnode-written debugging" }, 217 { "vnode", "Debug vnode use during segment write" }, 218 { "segment", "Debug segment writing" }, 219 { "seguse", "Debug segment used-bytes accounting" }, 220 { "cleaner", "Debug cleaning routines" }, 221 { "mount", "Debug mount/unmount routines" }, 222 { "pagecache", "Debug UBC interactions" }, 223 { "dirop", "Debug directory-operation accounting" }, 224 { "malloc", "Debug private malloc accounting" }, 225 }; 226 #endif /* DEBUG */ 227 struct shortlong stat_names[] = { /* Must match lfs.h! */ 228 { "segsused", "Number of new segments allocated" }, 229 { "psegwrites", "Number of partial-segment writes" }, 230 { "psyncwrites", "Number of synchronous partial-segment" 231 " writes" }, 232 { "pcleanwrites", "Number of partial-segment writes by the" 233 " cleaner" }, 234 { "blocktot", "Number of blocks written" }, 235 { "cleanblocks", "Number of blocks written by the cleaner" }, 236 { "ncheckpoints", "Number of checkpoints made" }, 237 { "nwrites", "Number of whole writes" }, 238 { "nsync_writes", "Number of synchronous writes" }, 239 { "wait_exceeded", "Number of times writer waited for" 240 " cleaner" }, 241 { "write_exceeded", "Number of times writer invoked flush" }, 242 { "flush_invoked", "Number of times flush was invoked" }, 243 { "vflush_invoked", "Number of time vflush was called" }, 244 { "clean_inlocked", "Number of vnodes skipped for VI_XLOCK" }, 245 { "clean_vnlocked", "Number of vnodes skipped for vget failure" }, 246 { "segs_reclaimed", "Number of segments reclaimed" }, 247 }; 248 249 sysctl_createv(clog, 0, NULL, NULL, 250 CTLFLAG_PERMANENT, 251 CTLTYPE_NODE, "vfs", NULL, 252 NULL, 0, NULL, 0, 253 CTL_VFS, CTL_EOL); 254 sysctl_createv(clog, 0, NULL, NULL, 255 CTLFLAG_PERMANENT, 256 CTLTYPE_NODE, "lfs", 257 SYSCTL_DESCR("Log-structured file system"), 258 NULL, 0, NULL, 0, 259 CTL_VFS, 5, CTL_EOL); 260 /* 261 * XXX the "5" above could be dynamic, thereby eliminating one 262 * more instance of the "number to vfs" mapping problem, but 263 * "5" is the order as taken from sys/mount.h 264 */ 265 266 sysctl_createv(clog, 0, NULL, NULL, 267 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 268 CTLTYPE_INT, "flushindir", NULL, 269 NULL, 0, &lfs_writeindir, 0, 270 CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); 271 sysctl_createv(clog, 0, NULL, NULL, 272 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 273 CTLTYPE_INT, "clean_vnhead", NULL, 274 NULL, 0, &lfs_clean_vnhead, 0, 275 CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); 276 sysctl_createv(clog, 0, NULL, NULL, 277 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 278 CTLTYPE_INT, "dostats", 279 SYSCTL_DESCR("Maintain statistics on LFS operations"), 280 sysctl_lfs_dostats, 0, &lfs_dostats, 0, 281 CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); 282 sysctl_createv(clog, 0, NULL, NULL, 283 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 284 CTLTYPE_INT, "pagetrip", 285 SYSCTL_DESCR("How many dirty pages in fs triggers" 286 " a flush"), 287 NULL, 0, &lfs_fs_pagetrip, 0, 288 CTL_VFS, 5, LFS_FS_PAGETRIP, CTL_EOL); 289 sysctl_createv(clog, 0, NULL, NULL, 290 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 291 CTLTYPE_INT, "ignore_lazy_sync", 292 SYSCTL_DESCR("Lazy Sync is ignored entirely"), 293 NULL, 0, &lfs_ignore_lazy_sync, 0, 294 CTL_VFS, 5, LFS_IGNORE_LAZY_SYNC, CTL_EOL); 295 #ifdef LFS_KERNEL_RFW 296 sysctl_createv(clog, 0, NULL, NULL, 297 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 298 CTLTYPE_INT, "rfw", 299 SYSCTL_DESCR("Use in-kernel roll-forward on mount"), 300 NULL, 0, &lfs_do_rfw, 0, 301 CTL_VFS, 5, LFS_DO_RFW, CTL_EOL); 302 #endif 303 304 sysctl_createv(clog, 0, NULL, NULL, 305 CTLFLAG_PERMANENT, 306 CTLTYPE_NODE, "stats", 307 SYSCTL_DESCR("Debugging options"), 308 NULL, 0, NULL, 0, 309 CTL_VFS, 5, LFS_STATS, CTL_EOL); 310 for (i = 0; i < sizeof(struct lfs_stats) / sizeof(u_int); i++) { 311 sysctl_createv(clog, 0, NULL, NULL, 312 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 313 CTLTYPE_INT, stat_names[i].sname, 314 SYSCTL_DESCR(stat_names[i].lname), 315 NULL, 0, &(((u_int *)&lfs_stats.segsused)[i]), 316 0, CTL_VFS, 5, LFS_STATS, i, CTL_EOL); 317 } 318 319 #ifdef DEBUG 320 sysctl_createv(clog, 0, NULL, NULL, 321 CTLFLAG_PERMANENT, 322 CTLTYPE_NODE, "debug", 323 SYSCTL_DESCR("Debugging options"), 324 NULL, 0, NULL, 0, 325 CTL_VFS, 5, LFS_DEBUGLOG, CTL_EOL); 326 for (i = 0; i < DLOG_MAX; i++) { 327 sysctl_createv(clog, 0, NULL, NULL, 328 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 329 CTLTYPE_INT, dlog_names[i].sname, 330 SYSCTL_DESCR(dlog_names[i].lname), 331 NULL, 0, &(lfs_debug_log_subsys[i]), 0, 332 CTL_VFS, 5, LFS_DEBUGLOG, i, CTL_EOL); 333 } 334 #endif 335 } 336 337 /* old cleaner syscall interface. see VOP_FCNTL() */ 338 static const struct syscall_package lfs_syscalls[] = { 339 { SYS_lfs_bmapv, 0, (sy_call_t *)sys_lfs_bmapv }, 340 { SYS_lfs_markv, 0, (sy_call_t *)sys_lfs_markv }, 341 { SYS_lfs_segclean, 0, (sy_call_t *)sys___lfs_segwait50 }, 342 { 0, 0, NULL }, 343 }; 344 345 static int 346 lfs_modcmd(modcmd_t cmd, void *arg) 347 { 348 int error; 349 350 switch (cmd) { 351 case MODULE_CMD_INIT: 352 error = syscall_establish(NULL, lfs_syscalls); 353 if (error) 354 return error; 355 error = vfs_attach(&lfs_vfsops); 356 if (error != 0) { 357 syscall_disestablish(NULL, lfs_syscalls); 358 break; 359 } 360 lfs_sysctl_setup(&lfs_sysctl_log); 361 break; 362 case MODULE_CMD_FINI: 363 error = vfs_detach(&lfs_vfsops); 364 if (error != 0) 365 break; 366 syscall_disestablish(NULL, lfs_syscalls); 367 sysctl_teardown(&lfs_sysctl_log); 368 break; 369 default: 370 error = ENOTTY; 371 break; 372 } 373 374 return (error); 375 } 376 377 /* 378 * XXX Same structure as FFS inodes? Should we share a common pool? 379 */ 380 struct pool lfs_inode_pool; 381 struct pool lfs_dinode_pool; 382 struct pool lfs_inoext_pool; 383 struct pool lfs_lbnentry_pool; 384 385 /* 386 * The writer daemon. UVM keeps track of how many dirty pages we are holding 387 * in lfs_subsys_pages; the daemon flushes the filesystem when this value 388 * crosses the (user-defined) threshhold LFS_MAX_PAGES. 389 */ 390 static void 391 lfs_writerd(void *arg) 392 { 393 struct mount *mp, *nmp; 394 struct lfs *fs; 395 struct vfsops *vfs = NULL; 396 int fsflags; 397 int loopcount; 398 int skipc; 399 int lfsc; 400 int wrote_something = 0; 401 402 mutex_enter(&lfs_lock); 403 lfs_writer_daemon = curproc->p_pid; 404 lfs_writer_lid = curlwp->l_lid; 405 mutex_exit(&lfs_lock); 406 407 /* Take an extra reference to the LFS vfsops. */ 408 vfs = vfs_getopsbyname(MOUNT_LFS); 409 410 mutex_enter(&lfs_lock); 411 for (;;) { 412 KASSERT(mutex_owned(&lfs_lock)); 413 if (wrote_something == 0) 414 mtsleep(&lfs_writer_daemon, PVM, "lfswriter", hz/10 + 1, 415 &lfs_lock); 416 417 KASSERT(mutex_owned(&lfs_lock)); 418 loopcount = 0; 419 wrote_something = 0; 420 421 /* 422 * If global state wants a flush, flush everything. 423 */ 424 if (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || 425 locked_queue_bytes > LFS_MAX_BYTES || 426 lfs_subsys_pages > LFS_MAX_PAGES) { 427 428 if (lfs_do_flush) { 429 DLOG((DLOG_FLUSH, "lfs_writerd: lfs_do_flush\n")); 430 } 431 if (locked_queue_count > LFS_MAX_BUFS) { 432 DLOG((DLOG_FLUSH, "lfs_writerd: lqc = %d, max %d\n", 433 locked_queue_count, LFS_MAX_BUFS)); 434 } 435 if (locked_queue_bytes > LFS_MAX_BYTES) { 436 DLOG((DLOG_FLUSH, "lfs_writerd: lqb = %ld, max %ld\n", 437 locked_queue_bytes, LFS_MAX_BYTES)); 438 } 439 if (lfs_subsys_pages > LFS_MAX_PAGES) { 440 DLOG((DLOG_FLUSH, "lfs_writerd: lssp = %d, max %d\n", 441 lfs_subsys_pages, LFS_MAX_PAGES)); 442 } 443 444 lfs_flush(NULL, SEGM_WRITERD, 0); 445 lfs_do_flush = 0; 446 KASSERT(mutex_owned(&lfs_lock)); 447 continue; 448 } 449 KASSERT(mutex_owned(&lfs_lock)); 450 mutex_exit(&lfs_lock); 451 452 /* 453 * Look through the list of LFSs to see if any of them 454 * have requested pageouts. 455 */ 456 mutex_enter(&mountlist_lock); 457 lfsc = 0; 458 skipc = 0; 459 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 460 mp = nmp) { 461 if (vfs_busy(mp, &nmp)) { 462 ++skipc; 463 continue; 464 } 465 KASSERT(!mutex_owned(&lfs_lock)); 466 if (strncmp(mp->mnt_stat.f_fstypename, MOUNT_LFS, 467 sizeof(mp->mnt_stat.f_fstypename)) == 0) { 468 ++lfsc; 469 fs = VFSTOULFS(mp)->um_lfs; 470 int32_t ooffset = 0; 471 fsflags = SEGM_SINGLE; 472 473 mutex_enter(&lfs_lock); 474 ooffset = fs->lfs_offset; 475 476 if (fs->lfs_nextseg < fs->lfs_curseg && fs->lfs_nowrap) { 477 /* Don't try to write if we're suspended */ 478 mutex_exit(&lfs_lock); 479 vfs_unbusy(mp, false, &nmp); 480 continue; 481 } 482 if (LFS_STARVED_FOR_SEGS(fs)) { 483 mutex_exit(&lfs_lock); 484 485 DLOG((DLOG_FLUSH, "lfs_writerd: need cleaning before writing possible\n")); 486 lfs_wakeup_cleaner(fs); 487 vfs_unbusy(mp, false, &nmp); 488 continue; 489 } 490 491 if ((fs->lfs_dirvcount > LFS_MAX_FSDIROP(fs) || 492 lfs_dirvcount > LFS_MAX_DIROP) && 493 fs->lfs_dirops == 0) { 494 fsflags &= ~SEGM_SINGLE; 495 fsflags |= SEGM_CKP; 496 DLOG((DLOG_FLUSH, "lfs_writerd: checkpoint\n")); 497 lfs_flush_fs(fs, fsflags); 498 } else if (fs->lfs_pdflush) { 499 DLOG((DLOG_FLUSH, "lfs_writerd: pdflush set\n")); 500 lfs_flush_fs(fs, fsflags); 501 } else if (!TAILQ_EMPTY(&fs->lfs_pchainhd)) { 502 DLOG((DLOG_FLUSH, "lfs_writerd: pchain non-empty\n")); 503 mutex_exit(&lfs_lock); 504 lfs_writer_enter(fs, "wrdirop"); 505 lfs_flush_pchain(fs); 506 lfs_writer_leave(fs); 507 mutex_enter(&lfs_lock); 508 } 509 if (fs->lfs_offset != ooffset) 510 ++wrote_something; 511 mutex_exit(&lfs_lock); 512 } 513 KASSERT(!mutex_owned(&lfs_lock)); 514 vfs_unbusy(mp, false, &nmp); 515 } 516 if (lfsc + skipc == 0) { 517 mutex_enter(&lfs_lock); 518 lfs_writer_daemon = 0; 519 lfs_writer_lid = 0; 520 mutex_exit(&lfs_lock); 521 mutex_exit(&mountlist_lock); 522 break; 523 } 524 mutex_exit(&mountlist_lock); 525 526 mutex_enter(&lfs_lock); 527 } 528 KASSERT(!mutex_owned(&lfs_lock)); 529 KASSERT(!mutex_owned(&mountlist_lock)); 530 531 /* Give up our extra reference so the module can be unloaded. */ 532 mutex_enter(&vfs_list_lock); 533 if (vfs != NULL) 534 vfs->vfs_refcount--; 535 mutex_exit(&vfs_list_lock); 536 537 /* Done! */ 538 kthread_exit(0); 539 } 540 541 /* 542 * Initialize the filesystem, most work done by ulfs_init. 543 */ 544 void 545 lfs_init(void) 546 { 547 548 malloc_type_attach(M_SEGMENT); 549 pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, 550 "lfsinopl", &pool_allocator_nointr, IPL_NONE); 551 pool_init(&lfs_dinode_pool, sizeof(struct ulfs1_dinode), 0, 0, 0, 552 "lfsdinopl", &pool_allocator_nointr, IPL_NONE); 553 pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, 554 "lfsinoextpl", &pool_allocator_nointr, IPL_NONE); 555 pool_init(&lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, 556 "lfslbnpool", &pool_allocator_nointr, IPL_NONE); 557 ulfs_init(); 558 559 #ifdef DEBUG 560 memset(lfs_log, 0, sizeof(lfs_log)); 561 #endif 562 mutex_init(&lfs_lock, MUTEX_DEFAULT, IPL_NONE); 563 cv_init(&locked_queue_cv, "lfsbuf"); 564 cv_init(&lfs_writing_cv, "lfsflush"); 565 } 566 567 void 568 lfs_reinit(void) 569 { 570 ulfs_reinit(); 571 } 572 573 void 574 lfs_done(void) 575 { 576 ulfs_done(); 577 mutex_destroy(&lfs_lock); 578 cv_destroy(&locked_queue_cv); 579 cv_destroy(&lfs_writing_cv); 580 pool_destroy(&lfs_inode_pool); 581 pool_destroy(&lfs_dinode_pool); 582 pool_destroy(&lfs_inoext_pool); 583 pool_destroy(&lfs_lbnentry_pool); 584 malloc_type_detach(M_SEGMENT); 585 } 586 587 /* 588 * Called by main() when ulfs is going to be mounted as root. 589 */ 590 int 591 lfs_mountroot(void) 592 { 593 extern struct vnode *rootvp; 594 struct lfs *fs = NULL; /* LFS */ 595 struct mount *mp; 596 struct lwp *l = curlwp; 597 struct ulfsmount *ump; 598 int error; 599 600 if (device_class(root_device) != DV_DISK) 601 return (ENODEV); 602 603 if (rootdev == NODEV) 604 return (ENODEV); 605 if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device", &mp))) { 606 vrele(rootvp); 607 return (error); 608 } 609 if ((error = lfs_mountfs(rootvp, mp, l))) { 610 vfs_unbusy(mp, false, NULL); 611 vfs_destroy(mp); 612 return (error); 613 } 614 mutex_enter(&mountlist_lock); 615 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 616 mutex_exit(&mountlist_lock); 617 ump = VFSTOULFS(mp); 618 fs = ump->um_lfs; 619 memset(fs->lfs_fsmnt, 0, sizeof(fs->lfs_fsmnt)); 620 (void)copystr(mp->mnt_stat.f_mntonname, fs->lfs_fsmnt, MNAMELEN - 1, 0); 621 (void)lfs_statvfs(mp, &mp->mnt_stat); 622 vfs_unbusy(mp, false, NULL); 623 setrootfstime((time_t)(VFSTOULFS(mp)->um_lfs->lfs_tstamp)); 624 return (0); 625 } 626 627 /* 628 * VFS Operations. 629 * 630 * mount system call 631 */ 632 int 633 lfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 634 { 635 struct lwp *l = curlwp; 636 struct vnode *devvp; 637 struct ulfs_args *args = data; 638 struct ulfsmount *ump = NULL; 639 struct lfs *fs = NULL; /* LFS */ 640 int error = 0, update; 641 mode_t accessmode; 642 643 if (*data_len < sizeof *args) 644 return EINVAL; 645 646 if (mp->mnt_flag & MNT_GETARGS) { 647 ump = VFSTOULFS(mp); 648 if (ump == NULL) 649 return EIO; 650 args->fspec = NULL; 651 *data_len = sizeof *args; 652 return 0; 653 } 654 655 update = mp->mnt_flag & MNT_UPDATE; 656 657 /* Check arguments */ 658 if (args->fspec != NULL) { 659 /* 660 * Look up the name and verify that it's sane. 661 */ 662 error = namei_simple_user(args->fspec, 663 NSM_FOLLOW_NOEMULROOT, &devvp); 664 if (error != 0) 665 return (error); 666 667 if (!update) { 668 /* 669 * Be sure this is a valid block device 670 */ 671 if (devvp->v_type != VBLK) 672 error = ENOTBLK; 673 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 674 error = ENXIO; 675 } else { 676 /* 677 * Be sure we're still naming the same device 678 * used for our initial mount 679 */ 680 ump = VFSTOULFS(mp); 681 if (devvp != ump->um_devvp) { 682 if (devvp->v_rdev != ump->um_devvp->v_rdev) 683 error = EINVAL; 684 else { 685 vrele(devvp); 686 devvp = ump->um_devvp; 687 vref(devvp); 688 } 689 } 690 } 691 } else { 692 if (!update) { 693 /* New mounts must have a filename for the device */ 694 return (EINVAL); 695 } else { 696 /* Use the extant mount */ 697 ump = VFSTOULFS(mp); 698 devvp = ump->um_devvp; 699 vref(devvp); 700 } 701 } 702 703 704 /* 705 * If mount by non-root, then verify that user has necessary 706 * permissions on the device. 707 */ 708 if (error == 0) { 709 accessmode = VREAD; 710 if (update ? 711 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 712 (mp->mnt_flag & MNT_RDONLY) == 0) 713 accessmode |= VWRITE; 714 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 715 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 716 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 717 KAUTH_ARG(accessmode)); 718 VOP_UNLOCK(devvp); 719 } 720 721 if (error) { 722 vrele(devvp); 723 return (error); 724 } 725 726 if (!update) { 727 int flags; 728 729 if (mp->mnt_flag & MNT_RDONLY) 730 flags = FREAD; 731 else 732 flags = FREAD|FWRITE; 733 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 734 error = VOP_OPEN(devvp, flags, FSCRED); 735 VOP_UNLOCK(devvp); 736 if (error) 737 goto fail; 738 error = lfs_mountfs(devvp, mp, l); /* LFS */ 739 if (error) { 740 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 741 (void)VOP_CLOSE(devvp, flags, NOCRED); 742 VOP_UNLOCK(devvp); 743 goto fail; 744 } 745 746 ump = VFSTOULFS(mp); 747 fs = ump->um_lfs; 748 } else { 749 /* 750 * Update the mount. 751 */ 752 753 /* 754 * The initial mount got a reference on this 755 * device, so drop the one obtained via 756 * namei(), above. 757 */ 758 vrele(devvp); 759 760 ump = VFSTOULFS(mp); 761 fs = ump->um_lfs; 762 763 if (fs->lfs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 764 /* 765 * Changing from read/write to read-only. 766 * XXX: shouldn't we sync here? or does vfs do that? 767 */ 768 #ifdef LFS_QUOTA2 769 /* XXX: quotas should remain on when readonly */ 770 if (fs->lfs_use_quota2) { 771 error = lfsquota2_umount(mp, 0); 772 if (error) { 773 return error; 774 } 775 } 776 #endif 777 } 778 779 if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 780 /* 781 * Changing from read-only to read/write. 782 * Note in the superblocks that we're writing. 783 */ 784 785 /* XXX: quotas should have been on even if readonly */ 786 if (fs->lfs_use_quota2) { 787 #ifdef LFS_QUOTA2 788 error = lfs_quota2_mount(mp); 789 #else 790 uprintf("%s: no kernel support for this " 791 "filesystem's quotas\n", 792 mp->mnt_stat.f_mntonname); 793 if (mp->mnt_flag & MNT_FORCE) { 794 uprintf("%s: mounting anyway; " 795 "fsck afterwards\n", 796 mp->mnt_stat.f_mntonname); 797 } else { 798 error = EINVAL; 799 } 800 #endif 801 if (error) { 802 return error; 803 } 804 } 805 806 fs->lfs_ronly = 0; 807 if (fs->lfs_pflags & LFS_PF_CLEAN) { 808 fs->lfs_pflags &= ~LFS_PF_CLEAN; 809 lfs_writesuper(fs, fs->lfs_sboffs[0]); 810 lfs_writesuper(fs, fs->lfs_sboffs[1]); 811 } 812 } 813 if (args->fspec == NULL) 814 return EINVAL; 815 } 816 817 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 818 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 819 if (error == 0) 820 (void)strncpy(fs->lfs_fsmnt, mp->mnt_stat.f_mntonname, 821 sizeof(fs->lfs_fsmnt)); 822 return error; 823 824 fail: 825 vrele(devvp); 826 return (error); 827 } 828 829 830 /* 831 * Common code for mount and mountroot 832 * LFS specific 833 */ 834 int 835 lfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 836 { 837 struct dlfs *tdfs, *dfs, *adfs; 838 struct lfs *fs; 839 struct ulfsmount *ump; 840 struct vnode *vp; 841 struct buf *bp, *abp; 842 dev_t dev; 843 int error, i, ronly, fsbsize; 844 kauth_cred_t cred; 845 CLEANERINFO *cip; 846 SEGUSE *sup; 847 daddr_t sb_addr; 848 849 cred = l ? l->l_cred : NOCRED; 850 851 /* 852 * Flush out any old buffers remaining from a previous use. 853 */ 854 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 855 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 856 VOP_UNLOCK(devvp); 857 if (error) 858 return (error); 859 860 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 861 862 /* Don't free random space on error. */ 863 bp = NULL; 864 abp = NULL; 865 ump = NULL; 866 867 sb_addr = LFS_LABELPAD / DEV_BSIZE; 868 while (1) { 869 /* Read in the superblock. */ 870 error = bread(devvp, sb_addr, LFS_SBPAD, cred, 0, &bp); 871 if (error) 872 goto out; 873 dfs = (struct dlfs *)bp->b_data; 874 875 /* Check the basics. */ 876 if (dfs->dlfs_magic != LFS_MAGIC || dfs->dlfs_bsize > MAXBSIZE || 877 dfs->dlfs_version > LFS_VERSION || 878 dfs->dlfs_bsize < sizeof(struct dlfs)) { 879 DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock sanity failed\n")); 880 error = EINVAL; /* XXX needs translation */ 881 goto out; 882 } 883 if (dfs->dlfs_inodefmt > LFS_MAXINODEFMT) { 884 DLOG((DLOG_MOUNT, "lfs_mountfs: unknown inode format %d\n", 885 dfs->dlfs_inodefmt)); 886 error = EINVAL; 887 goto out; 888 } 889 890 if (dfs->dlfs_version == 1) 891 fsbsize = DEV_BSIZE; 892 else { 893 fsbsize = 1 << dfs->dlfs_ffshift; 894 /* 895 * Could be, if the frag size is large enough, that we 896 * don't have the "real" primary superblock. If that's 897 * the case, get the real one, and try again. 898 */ 899 if (sb_addr != (dfs->dlfs_sboffs[0] << (dfs->dlfs_ffshift - DEV_BSHIFT))) { 900 DLOG((DLOG_MOUNT, "lfs_mountfs: sb daddr" 901 " 0x%llx is not right, trying 0x%llx\n", 902 (long long)sb_addr, 903 (long long)(dfs->dlfs_sboffs[0] << (dfs->dlfs_ffshift - DEV_BSHIFT)))); 904 sb_addr = dfs->dlfs_sboffs[0] << (dfs->dlfs_ffshift - DEV_BSHIFT); 905 brelse(bp, 0); 906 continue; 907 } 908 } 909 break; 910 } 911 912 /* 913 * Check the second superblock to see which is newer; then mount 914 * using the older of the two. This is necessary to ensure that 915 * the filesystem is valid if it was not unmounted cleanly. 916 */ 917 918 if (dfs->dlfs_sboffs[1] && 919 dfs->dlfs_sboffs[1] - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) 920 { 921 error = bread(devvp, dfs->dlfs_sboffs[1] * (fsbsize / DEV_BSIZE), 922 LFS_SBPAD, cred, 0, &abp); 923 if (error) 924 goto out; 925 adfs = (struct dlfs *)abp->b_data; 926 927 if (dfs->dlfs_version == 1) { 928 /* 1s resolution comparison */ 929 if (adfs->dlfs_tstamp < dfs->dlfs_tstamp) 930 tdfs = adfs; 931 else 932 tdfs = dfs; 933 } else { 934 /* monotonic infinite-resolution comparison */ 935 if (adfs->dlfs_serial < dfs->dlfs_serial) 936 tdfs = adfs; 937 else 938 tdfs = dfs; 939 } 940 941 /* Check the basics. */ 942 if (tdfs->dlfs_magic != LFS_MAGIC || 943 tdfs->dlfs_bsize > MAXBSIZE || 944 tdfs->dlfs_version > LFS_VERSION || 945 tdfs->dlfs_bsize < sizeof(struct dlfs)) { 946 DLOG((DLOG_MOUNT, "lfs_mountfs: alt superblock" 947 " sanity failed\n")); 948 error = EINVAL; /* XXX needs translation */ 949 goto out; 950 } 951 } else { 952 DLOG((DLOG_MOUNT, "lfs_mountfs: invalid alt superblock" 953 " daddr=0x%x\n", dfs->dlfs_sboffs[1])); 954 error = EINVAL; 955 goto out; 956 } 957 958 /* Allocate the mount structure, copy the superblock into it. */ 959 fs = kmem_zalloc(sizeof(struct lfs), KM_SLEEP); 960 memcpy(&fs->lfs_dlfs, tdfs, sizeof(struct dlfs)); 961 962 /* Compatibility */ 963 if (fs->lfs_version < 2) { 964 fs->lfs_sumsize = LFS_V1_SUMMARY_SIZE; 965 fs->lfs_ibsize = fs->lfs_bsize; 966 fs->lfs_start = fs->lfs_sboffs[0]; 967 fs->lfs_tstamp = fs->lfs_otstamp; 968 fs->lfs_fsbtodb = 0; 969 } 970 if (fs->lfs_resvseg == 0) 971 fs->lfs_resvseg = MIN(fs->lfs_minfreeseg - 1, \ 972 MAX(MIN_RESV_SEGS, fs->lfs_minfreeseg / 2 + 1)); 973 974 /* 975 * If we aren't going to be able to write meaningfully to this 976 * filesystem, and were not mounted readonly, bomb out now. 977 */ 978 if (lfs_fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) { 979 DLOG((DLOG_MOUNT, "lfs_mount: to mount this filesystem read/write," 980 " we need BUFPAGES >= %lld\n", 981 (long long)((bufmem_hiwater / bufmem_lowater) * 982 LFS_INVERSE_MAX_BYTES( 983 lfs_fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT))); 984 kmem_free(fs, sizeof(struct lfs)); 985 error = EFBIG; /* XXX needs translation */ 986 goto out; 987 } 988 989 /* Before rolling forward, lock so vget will sleep for other procs */ 990 if (l != NULL) { 991 fs->lfs_flags = LFS_NOTYET; 992 fs->lfs_rfpid = l->l_proc->p_pid; 993 } 994 995 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 996 ump->um_lfs = fs; 997 ump->um_fstype = ULFS1; 998 if (sizeof(struct lfs) < LFS_SBPAD) { /* XXX why? */ 999 brelse(bp, BC_INVAL); 1000 brelse(abp, BC_INVAL); 1001 } else { 1002 brelse(bp, 0); 1003 brelse(abp, 0); 1004 } 1005 bp = NULL; 1006 abp = NULL; 1007 1008 1009 /* Set up the I/O information */ 1010 fs->lfs_devbsize = DEV_BSIZE; 1011 fs->lfs_iocount = 0; 1012 fs->lfs_diropwait = 0; 1013 fs->lfs_activesb = 0; 1014 fs->lfs_uinodes = 0; 1015 fs->lfs_ravail = 0; 1016 fs->lfs_favail = 0; 1017 fs->lfs_sbactive = 0; 1018 1019 /* Set up the ifile and lock aflags */ 1020 fs->lfs_doifile = 0; 1021 fs->lfs_writer = 0; 1022 fs->lfs_dirops = 0; 1023 fs->lfs_nadirop = 0; 1024 fs->lfs_seglock = 0; 1025 fs->lfs_pdflush = 0; 1026 fs->lfs_sleepers = 0; 1027 fs->lfs_pages = 0; 1028 rw_init(&fs->lfs_fraglock); 1029 rw_init(&fs->lfs_iflock); 1030 cv_init(&fs->lfs_stopcv, "lfsstop"); 1031 1032 /* Set the file system readonly/modify bits. */ 1033 fs->lfs_ronly = ronly; 1034 if (ronly == 0) 1035 fs->lfs_fmod = 1; 1036 1037 /* ulfs-level information */ 1038 fs->um_flags = 0; 1039 fs->um_bptrtodb = fs->lfs_ffshift - DEV_BSHIFT; 1040 fs->um_seqinc = fs->lfs_frag; 1041 fs->um_nindir = fs->lfs_nindir; 1042 fs->um_lognindir = ffs(fs->lfs_nindir) - 1; 1043 fs->um_maxsymlinklen = fs->lfs_maxsymlinklen; 1044 fs->um_dirblksiz = LFS_DIRBLKSIZ; 1045 fs->um_maxfilesize = fs->lfs_maxfilesize; 1046 1047 /* quota stuff */ 1048 /* XXX: these need to come from the on-disk superblock to be used */ 1049 fs->lfs_use_quota2 = 0; 1050 fs->lfs_quota_magic = 0; 1051 fs->lfs_quota_flags = 0; 1052 fs->lfs_quotaino[0] = 0; 1053 fs->lfs_quotaino[1] = 0; 1054 1055 /* Initialize the mount structure. */ 1056 dev = devvp->v_rdev; 1057 mp->mnt_data = ump; 1058 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1059 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); 1060 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1061 mp->mnt_stat.f_namemax = LFS_MAXNAMLEN; 1062 mp->mnt_stat.f_iosize = fs->lfs_bsize; 1063 mp->mnt_flag |= MNT_LOCAL; 1064 mp->mnt_fs_bshift = fs->lfs_bshift; 1065 if (fs->um_maxsymlinklen > 0) 1066 mp->mnt_iflag |= IMNT_DTYPE; 1067 1068 ump->um_mountp = mp; 1069 ump->um_dev = dev; 1070 ump->um_devvp = devvp; 1071 for (i = 0; i < ULFS_MAXQUOTAS; i++) 1072 ump->um_quotas[i] = NULLVP; 1073 devvp->v_specmountpoint = mp; 1074 1075 /* Set up reserved memory for pageout */ 1076 lfs_setup_resblks(fs); 1077 /* Set up vdirop tailq */ 1078 TAILQ_INIT(&fs->lfs_dchainhd); 1079 /* and paging tailq */ 1080 TAILQ_INIT(&fs->lfs_pchainhd); 1081 /* and delayed segment accounting for truncation list */ 1082 LIST_INIT(&fs->lfs_segdhd); 1083 1084 /* 1085 * We use the ifile vnode for almost every operation. Instead of 1086 * retrieving it from the hash table each time we retrieve it here, 1087 * artificially increment the reference count and keep a pointer 1088 * to it in the incore copy of the superblock. 1089 */ 1090 if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { 1091 DLOG((DLOG_MOUNT, "lfs_mountfs: ifile vget failed, error=%d\n", error)); 1092 goto out; 1093 } 1094 fs->lfs_ivnode = vp; 1095 vref(vp); 1096 1097 /* Set up inode bitmap and order free list */ 1098 lfs_order_freelist(fs); 1099 1100 /* Set up segment usage flags for the autocleaner. */ 1101 fs->lfs_nactive = 0; 1102 fs->lfs_suflags = (u_int32_t **)malloc(2 * sizeof(u_int32_t *), 1103 M_SEGMENT, M_WAITOK); 1104 fs->lfs_suflags[0] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1105 M_SEGMENT, M_WAITOK); 1106 fs->lfs_suflags[1] = (u_int32_t *)malloc(fs->lfs_nseg * sizeof(u_int32_t), 1107 M_SEGMENT, M_WAITOK); 1108 memset(fs->lfs_suflags[1], 0, fs->lfs_nseg * sizeof(u_int32_t)); 1109 for (i = 0; i < fs->lfs_nseg; i++) { 1110 int changed; 1111 1112 LFS_SEGENTRY(sup, fs, i, bp); 1113 changed = 0; 1114 if (!ronly) { 1115 if (sup->su_nbytes == 0 && 1116 !(sup->su_flags & SEGUSE_EMPTY)) { 1117 sup->su_flags |= SEGUSE_EMPTY; 1118 ++changed; 1119 } else if (!(sup->su_nbytes == 0) && 1120 (sup->su_flags & SEGUSE_EMPTY)) { 1121 sup->su_flags &= ~SEGUSE_EMPTY; 1122 ++changed; 1123 } 1124 if (sup->su_flags & (SEGUSE_ACTIVE|SEGUSE_INVAL)) { 1125 sup->su_flags &= ~(SEGUSE_ACTIVE|SEGUSE_INVAL); 1126 ++changed; 1127 } 1128 } 1129 fs->lfs_suflags[0][i] = sup->su_flags; 1130 if (changed) 1131 LFS_WRITESEGENTRY(sup, fs, i, bp); 1132 else 1133 brelse(bp, 0); 1134 } 1135 1136 /* 1137 * XXX: if the fs has quotas, quotas should be on even if 1138 * readonly. Otherwise you can't query the quota info! 1139 * However, that's not how the quota2 code got written and I 1140 * don't know if it'll behave itself if enabled while 1141 * readonly, so for now use the same enable logic as ffs. 1142 * 1143 * XXX: also, if you use the -f behavior allowed here (and 1144 * equivalently above for remount) it will corrupt the fs. It 1145 * ought not to allow that. It should allow mounting readonly 1146 * if there are quotas and the kernel doesn't have the quota 1147 * code, but only readonly. 1148 * 1149 * XXX: and if you use the -f behavior allowed here it will 1150 * likely crash at unmount time (or remount time) because we 1151 * think quotas are active. 1152 * 1153 * Although none of this applies until there's a way to set 1154 * lfs_use_quota2 and have quotas in the fs at all. 1155 */ 1156 if (!ronly && fs->lfs_use_quota2) { 1157 #ifdef LFS_QUOTA2 1158 error = lfs_quota2_mount(mp); 1159 #else 1160 uprintf("%s: no kernel support for this filesystem's quotas\n", 1161 mp->mnt_stat.f_mntonname); 1162 if (mp->mnt_flag & MNT_FORCE) { 1163 uprintf("%s: mounting anyway; fsck afterwards\n", 1164 mp->mnt_stat.f_mntonname); 1165 } else { 1166 error = EINVAL; 1167 } 1168 #endif 1169 if (error) { 1170 /* XXX XXX must clean up the stuff immediately above */ 1171 printf("lfs_mountfs: sorry, leaking some memory\n"); 1172 goto out; 1173 } 1174 } 1175 1176 #ifdef LFS_EXTATTR 1177 /* 1178 * Initialize file-backed extended attributes for ULFS1 file 1179 * systems. 1180 * 1181 * XXX: why is this limited to ULFS1? 1182 */ 1183 if (ump->um_fstype == ULFS1) { 1184 ulfs_extattr_uepm_init(&ump->um_extattr); 1185 } 1186 #endif 1187 1188 #ifdef LFS_KERNEL_RFW 1189 lfs_roll_forward(fs, mp, l); 1190 #endif 1191 1192 /* If writing, sb is not clean; record in case of immediate crash */ 1193 if (!fs->lfs_ronly) { 1194 fs->lfs_pflags &= ~LFS_PF_CLEAN; 1195 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1196 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1197 } 1198 1199 /* Allow vget now that roll-forward is complete */ 1200 fs->lfs_flags &= ~(LFS_NOTYET); 1201 wakeup(&fs->lfs_flags); 1202 1203 /* 1204 * Initialize the ifile cleaner info with information from 1205 * the superblock. 1206 */ 1207 LFS_CLEANERINFO(cip, fs, bp); 1208 cip->clean = fs->lfs_nclean; 1209 cip->dirty = fs->lfs_nseg - fs->lfs_nclean; 1210 cip->avail = fs->lfs_avail; 1211 cip->bfree = fs->lfs_bfree; 1212 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 1213 1214 /* 1215 * Mark the current segment as ACTIVE, since we're going to 1216 * be writing to it. 1217 */ 1218 LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, fs->lfs_offset), bp); 1219 sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; 1220 fs->lfs_nactive++; 1221 LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, fs->lfs_offset), bp); /* Ifile */ 1222 1223 /* Now that roll-forward is done, unlock the Ifile */ 1224 vput(vp); 1225 1226 /* Start the pagedaemon-anticipating daemon */ 1227 mutex_enter(&lfs_lock); 1228 if (lfs_writer_daemon == 0 && lfs_writer_lid == 0 && 1229 kthread_create(PRI_BIO, 0, NULL, 1230 lfs_writerd, NULL, NULL, "lfs_writer") != 0) 1231 panic("fork lfs_writer"); 1232 mutex_exit(&lfs_lock); 1233 1234 printf("WARNING: the log-structured file system is experimental\n" 1235 "WARNING: it may cause system crashes and/or corrupt data\n"); 1236 1237 return (0); 1238 1239 out: 1240 if (bp) 1241 brelse(bp, 0); 1242 if (abp) 1243 brelse(abp, 0); 1244 if (ump) { 1245 kmem_free(ump->um_lfs, sizeof(struct lfs)); 1246 kmem_free(ump, sizeof(*ump)); 1247 mp->mnt_data = NULL; 1248 } 1249 1250 return (error); 1251 } 1252 1253 /* 1254 * unmount system call 1255 */ 1256 int 1257 lfs_unmount(struct mount *mp, int mntflags) 1258 { 1259 struct lwp *l = curlwp; 1260 struct ulfsmount *ump; 1261 struct lfs *fs; 1262 int error, flags, ronly; 1263 vnode_t *vp; 1264 1265 flags = 0; 1266 if (mntflags & MNT_FORCE) 1267 flags |= FORCECLOSE; 1268 1269 ump = VFSTOULFS(mp); 1270 fs = ump->um_lfs; 1271 1272 /* Two checkpoints */ 1273 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1274 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1275 1276 /* wake up the cleaner so it can die */ 1277 /* XXX: shouldn't this be *after* the error cases below? */ 1278 lfs_wakeup_cleaner(fs); 1279 mutex_enter(&lfs_lock); 1280 while (fs->lfs_sleepers) 1281 mtsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers", 0, 1282 &lfs_lock); 1283 mutex_exit(&lfs_lock); 1284 1285 #ifdef LFS_EXTATTR 1286 if (ump->um_fstype == ULFS1) { 1287 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_STARTED) { 1288 ulfs_extattr_stop(mp, curlwp); 1289 } 1290 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_INITIALIZED) { 1291 ulfs_extattr_uepm_destroy(&ump->um_extattr); 1292 } 1293 } 1294 #endif 1295 #ifdef LFS_QUOTA 1296 if ((error = lfsquota1_umount(mp, flags)) != 0) 1297 return (error); 1298 #endif 1299 #ifdef LFS_QUOTA2 1300 if ((error = lfsquota2_umount(mp, flags)) != 0) 1301 return (error); 1302 #endif 1303 if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) 1304 return (error); 1305 if ((error = VFS_SYNC(mp, 1, l->l_cred)) != 0) 1306 return (error); 1307 vp = fs->lfs_ivnode; 1308 mutex_enter(vp->v_interlock); 1309 if (LIST_FIRST(&vp->v_dirtyblkhd)) 1310 panic("lfs_unmount: still dirty blocks on ifile vnode"); 1311 mutex_exit(vp->v_interlock); 1312 1313 /* Explicitly write the superblock, to update serial and pflags */ 1314 fs->lfs_pflags |= LFS_PF_CLEAN; 1315 lfs_writesuper(fs, fs->lfs_sboffs[0]); 1316 lfs_writesuper(fs, fs->lfs_sboffs[1]); 1317 mutex_enter(&lfs_lock); 1318 while (fs->lfs_iocount) 1319 mtsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount", 0, 1320 &lfs_lock); 1321 mutex_exit(&lfs_lock); 1322 1323 /* Finish with the Ifile, now that we're done with it */ 1324 vgone(fs->lfs_ivnode); 1325 1326 ronly = !fs->lfs_ronly; 1327 if (ump->um_devvp->v_type != VBAD) 1328 ump->um_devvp->v_specmountpoint = NULL; 1329 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1330 error = VOP_CLOSE(ump->um_devvp, 1331 ronly ? FREAD : FREAD|FWRITE, NOCRED); 1332 vput(ump->um_devvp); 1333 1334 /* Complain about page leakage */ 1335 if (fs->lfs_pages > 0) 1336 printf("lfs_unmount: still claim %d pages (%d in subsystem)\n", 1337 fs->lfs_pages, lfs_subsys_pages); 1338 1339 /* Free per-mount data structures */ 1340 free(fs->lfs_ino_bitmap, M_SEGMENT); 1341 free(fs->lfs_suflags[0], M_SEGMENT); 1342 free(fs->lfs_suflags[1], M_SEGMENT); 1343 free(fs->lfs_suflags, M_SEGMENT); 1344 lfs_free_resblks(fs); 1345 cv_destroy(&fs->lfs_stopcv); 1346 rw_destroy(&fs->lfs_fraglock); 1347 rw_destroy(&fs->lfs_iflock); 1348 1349 kmem_free(fs, sizeof(struct lfs)); 1350 kmem_free(ump, sizeof(*ump)); 1351 1352 mp->mnt_data = NULL; 1353 mp->mnt_flag &= ~MNT_LOCAL; 1354 return (error); 1355 } 1356 1357 /* 1358 * Get file system statistics. 1359 * 1360 * NB: We don't lock to access the superblock here, because it's not 1361 * really that important if we get it wrong. 1362 */ 1363 int 1364 lfs_statvfs(struct mount *mp, struct statvfs *sbp) 1365 { 1366 struct lfs *fs; 1367 struct ulfsmount *ump; 1368 1369 ump = VFSTOULFS(mp); 1370 fs = ump->um_lfs; 1371 if (fs->lfs_magic != LFS_MAGIC) 1372 panic("lfs_statvfs: magic"); 1373 1374 sbp->f_bsize = fs->lfs_bsize; 1375 sbp->f_frsize = fs->lfs_fsize; 1376 sbp->f_iosize = fs->lfs_bsize; 1377 sbp->f_blocks = LFS_EST_NONMETA(fs) - VTOI(fs->lfs_ivnode)->i_lfs_effnblks; 1378 1379 sbp->f_bfree = LFS_EST_BFREE(fs); 1380 KASSERT(sbp->f_bfree <= fs->lfs_dsize); 1381 #if 0 1382 if (sbp->f_bfree < 0) 1383 sbp->f_bfree = 0; 1384 #endif 1385 1386 sbp->f_bresvd = LFS_EST_RSVD(fs); 1387 if (sbp->f_bfree > sbp->f_bresvd) 1388 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1389 else 1390 sbp->f_bavail = 0; 1391 1392 sbp->f_files = fs->lfs_bfree / lfs_btofsb(fs, fs->lfs_ibsize) 1393 * LFS_INOPB(fs); 1394 sbp->f_ffree = sbp->f_files - fs->lfs_nfiles; 1395 sbp->f_favail = sbp->f_ffree; 1396 sbp->f_fresvd = 0; 1397 copy_statvfs_info(sbp, mp); 1398 return (0); 1399 } 1400 1401 /* 1402 * Go through the disk queues to initiate sandbagged IO; 1403 * go through the inodes to write those that have been modified; 1404 * initiate the writing of the super block if it has been modified. 1405 * 1406 * Note: we are always called with the filesystem marked `MPBUSY'. 1407 */ 1408 int 1409 lfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1410 { 1411 int error; 1412 struct lfs *fs; 1413 1414 fs = VFSTOULFS(mp)->um_lfs; 1415 if (fs->lfs_ronly) 1416 return 0; 1417 1418 /* Snapshots should not hose the syncer */ 1419 /* 1420 * XXX Sync can block here anyway, since we don't have a very 1421 * XXX good idea of how much data is pending. If it's more 1422 * XXX than a segment and lfs_nextseg is close to the end of 1423 * XXX the log, we'll likely block. 1424 */ 1425 mutex_enter(&lfs_lock); 1426 if (fs->lfs_nowrap && fs->lfs_nextseg < fs->lfs_curseg) { 1427 mutex_exit(&lfs_lock); 1428 return 0; 1429 } 1430 mutex_exit(&lfs_lock); 1431 1432 lfs_writer_enter(fs, "lfs_dirops"); 1433 1434 /* All syncs must be checkpoints until roll-forward is implemented. */ 1435 DLOG((DLOG_FLUSH, "lfs_sync at 0x%x\n", fs->lfs_offset)); 1436 error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); 1437 lfs_writer_leave(fs); 1438 #ifdef LFS_QUOTA 1439 lfs_qsync(mp); 1440 #endif 1441 return (error); 1442 } 1443 1444 /* 1445 * Look up an LFS dinode number to find its incore vnode. If not already 1446 * in core, read it in from the specified device. Return the inode locked. 1447 * Detection and handling of mount points must be done by the calling routine. 1448 */ 1449 int 1450 lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1451 { 1452 struct lfs *fs; 1453 struct ulfs1_dinode *dip; 1454 struct inode *ip; 1455 struct buf *bp; 1456 struct ifile *ifp; 1457 struct vnode *vp; 1458 struct ulfsmount *ump; 1459 daddr_t daddr; 1460 dev_t dev; 1461 int error, retries; 1462 struct timespec ts; 1463 1464 memset(&ts, 0, sizeof ts); /* XXX gcc */ 1465 1466 ump = VFSTOULFS(mp); 1467 dev = ump->um_dev; 1468 fs = ump->um_lfs; 1469 1470 /* 1471 * If the filesystem is not completely mounted yet, suspend 1472 * any access requests (wait for roll-forward to complete). 1473 */ 1474 mutex_enter(&lfs_lock); 1475 while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) 1476 mtsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet", 0, 1477 &lfs_lock); 1478 mutex_exit(&lfs_lock); 1479 1480 retry: 1481 if ((*vpp = ulfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1482 return (0); 1483 1484 error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, NULL, &vp); 1485 if (error) { 1486 *vpp = NULL; 1487 return (error); 1488 } 1489 1490 mutex_enter(&ulfs_hashlock); 1491 if (ulfs_ihashget(dev, ino, 0) != NULL) { 1492 mutex_exit(&ulfs_hashlock); 1493 ungetnewvnode(vp); 1494 goto retry; 1495 } 1496 1497 /* Translate the inode number to a disk address. */ 1498 if (ino == LFS_IFILE_INUM) 1499 daddr = fs->lfs_idaddr; 1500 else { 1501 /* XXX bounds-check this too */ 1502 LFS_IENTRY(ifp, fs, ino, bp); 1503 daddr = ifp->if_daddr; 1504 if (fs->lfs_version > 1) { 1505 ts.tv_sec = ifp->if_atime_sec; 1506 ts.tv_nsec = ifp->if_atime_nsec; 1507 } 1508 1509 brelse(bp, 0); 1510 if (daddr == LFS_UNUSED_DADDR) { 1511 *vpp = NULLVP; 1512 mutex_exit(&ulfs_hashlock); 1513 ungetnewvnode(vp); 1514 return (ENOENT); 1515 } 1516 } 1517 1518 /* Allocate/init new vnode/inode. */ 1519 lfs_vcreate(mp, ino, vp); 1520 1521 /* 1522 * Put it onto its hash chain and lock it so that other requests for 1523 * this inode will block if they arrive while we are sleeping waiting 1524 * for old data structures to be purged or for the contents of the 1525 * disk portion of this inode to be read. 1526 */ 1527 ip = VTOI(vp); 1528 ulfs_ihashins(ip); 1529 mutex_exit(&ulfs_hashlock); 1530 1531 /* 1532 * XXX 1533 * This may not need to be here, logically it should go down with 1534 * the i_devvp initialization. 1535 * Ask Kirk. 1536 */ 1537 ip->i_lfs = ump->um_lfs; 1538 1539 /* Read in the disk contents for the inode, copy into the inode. */ 1540 retries = 0; 1541 again: 1542 error = bread(ump->um_devvp, LFS_FSBTODB(fs, daddr), 1543 (fs->lfs_version == 1 ? fs->lfs_bsize : fs->lfs_ibsize), 1544 NOCRED, 0, &bp); 1545 if (error) { 1546 /* 1547 * The inode does not contain anything useful, so it would 1548 * be misleading to leave it on its hash chain. With mode 1549 * still zero, it will be unlinked and returned to the free 1550 * list by vput(). 1551 */ 1552 vput(vp); 1553 *vpp = NULL; 1554 return (error); 1555 } 1556 1557 dip = lfs_ifind(fs, ino, bp); 1558 if (dip == NULL) { 1559 /* Assume write has not completed yet; try again */ 1560 brelse(bp, BC_INVAL); 1561 ++retries; 1562 if (retries > LFS_IFIND_RETRIES) { 1563 #ifdef DEBUG 1564 /* If the seglock is held look at the bpp to see 1565 what is there anyway */ 1566 mutex_enter(&lfs_lock); 1567 if (fs->lfs_seglock > 0) { 1568 struct buf **bpp; 1569 struct ulfs1_dinode *dp; 1570 int i; 1571 1572 for (bpp = fs->lfs_sp->bpp; 1573 bpp != fs->lfs_sp->cbpp; ++bpp) { 1574 if ((*bpp)->b_vp == fs->lfs_ivnode && 1575 bpp != fs->lfs_sp->bpp) { 1576 /* Inode block */ 1577 printf("lfs_vget: block 0x%" PRIx64 ": ", 1578 (*bpp)->b_blkno); 1579 dp = (struct ulfs1_dinode *)(*bpp)->b_data; 1580 for (i = 0; i < LFS_INOPB(fs); i++) 1581 if (dp[i].di_inumber) 1582 printf("%d ", dp[i].di_inumber); 1583 printf("\n"); 1584 } 1585 } 1586 } 1587 mutex_exit(&lfs_lock); 1588 #endif /* DEBUG */ 1589 panic("lfs_vget: dinode not found"); 1590 } 1591 mutex_enter(&lfs_lock); 1592 if (fs->lfs_iocount) { 1593 DLOG((DLOG_VNODE, "lfs_vget: dinode %d not found, retrying...\n", ino)); 1594 (void)mtsleep(&fs->lfs_iocount, PRIBIO + 1, 1595 "lfs ifind", 1, &lfs_lock); 1596 } else 1597 retries = LFS_IFIND_RETRIES; 1598 mutex_exit(&lfs_lock); 1599 goto again; 1600 } 1601 *ip->i_din.ffs1_din = *dip; 1602 brelse(bp, 0); 1603 1604 if (fs->lfs_version > 1) { 1605 ip->i_ffs1_atime = ts.tv_sec; 1606 ip->i_ffs1_atimensec = ts.tv_nsec; 1607 } 1608 1609 lfs_vinit(mp, &vp); 1610 1611 *vpp = vp; 1612 1613 KASSERT(VOP_ISLOCKED(vp)); 1614 1615 return (0); 1616 } 1617 1618 /* 1619 * File handle to vnode 1620 */ 1621 int 1622 lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1623 { 1624 struct lfid lfh; 1625 struct buf *bp; 1626 IFILE *ifp; 1627 int32_t daddr; 1628 struct lfs *fs; 1629 vnode_t *vp; 1630 1631 if (fhp->fid_len != sizeof(struct lfid)) 1632 return EINVAL; 1633 1634 memcpy(&lfh, fhp, sizeof(lfh)); 1635 if (lfh.lfid_ino < LFS_IFILE_INUM) 1636 return ESTALE; 1637 1638 fs = VFSTOULFS(mp)->um_lfs; 1639 if (lfh.lfid_ident != fs->lfs_ident) 1640 return ESTALE; 1641 1642 if (lfh.lfid_ino > 1643 ((VTOI(fs->lfs_ivnode)->i_ffs1_size >> fs->lfs_bshift) - 1644 fs->lfs_cleansz - fs->lfs_segtabsz) * fs->lfs_ifpb) 1645 return ESTALE; 1646 1647 mutex_enter(&ulfs_ihash_lock); 1648 vp = ulfs_ihashlookup(VFSTOULFS(mp)->um_dev, lfh.lfid_ino); 1649 mutex_exit(&ulfs_ihash_lock); 1650 if (vp == NULL) { 1651 LFS_IENTRY(ifp, fs, lfh.lfid_ino, bp); 1652 daddr = ifp->if_daddr; 1653 brelse(bp, 0); 1654 if (daddr == LFS_UNUSED_DADDR) 1655 return ESTALE; 1656 } 1657 1658 return (ulfs_fhtovp(mp, &lfh.lfid_ufid, vpp)); 1659 } 1660 1661 /* 1662 * Vnode pointer to File handle 1663 */ 1664 /* ARGSUSED */ 1665 int 1666 lfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1667 { 1668 struct inode *ip; 1669 struct lfid lfh; 1670 1671 if (*fh_size < sizeof(struct lfid)) { 1672 *fh_size = sizeof(struct lfid); 1673 return E2BIG; 1674 } 1675 *fh_size = sizeof(struct lfid); 1676 ip = VTOI(vp); 1677 memset(&lfh, 0, sizeof(lfh)); 1678 lfh.lfid_len = sizeof(struct lfid); 1679 lfh.lfid_ino = ip->i_number; 1680 lfh.lfid_gen = ip->i_gen; 1681 lfh.lfid_ident = ip->i_lfs->lfs_ident; 1682 memcpy(fhp, &lfh, sizeof(lfh)); 1683 return (0); 1684 } 1685 1686 /* 1687 * ulfs_bmaparray callback function for writing. 1688 * 1689 * Since blocks will be written to the new segment anyway, 1690 * we don't care about current daddr of them. 1691 */ 1692 static bool 1693 lfs_issequential_hole(const struct lfs *fs, 1694 daddr_t daddr0, daddr_t daddr1) 1695 { 1696 (void)fs; /* not used */ 1697 1698 daddr0 = (daddr_t)((int32_t)daddr0); /* XXX ondisk32 */ 1699 daddr1 = (daddr_t)((int32_t)daddr1); /* XXX ondisk32 */ 1700 1701 KASSERT(daddr0 == UNWRITTEN || 1702 (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR)); 1703 KASSERT(daddr1 == UNWRITTEN || 1704 (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR)); 1705 1706 /* NOTE: all we want to know here is 'hole or not'. */ 1707 /* NOTE: UNASSIGNED is converted to 0 by ulfs_bmaparray. */ 1708 1709 /* 1710 * treat UNWRITTENs and all resident blocks as 'contiguous' 1711 */ 1712 if (daddr0 != 0 && daddr1 != 0) 1713 return true; 1714 1715 /* 1716 * both are in hole? 1717 */ 1718 if (daddr0 == 0 && daddr1 == 0) 1719 return true; /* all holes are 'contiguous' for us. */ 1720 1721 return false; 1722 } 1723 1724 /* 1725 * lfs_gop_write functions exactly like genfs_gop_write, except that 1726 * (1) it requires the seglock to be held by its caller, and sp->fip 1727 * to be properly initialized (it will return without re-initializing 1728 * sp->fip, and without calling lfs_writeseg). 1729 * (2) it uses the remaining space in the segment, rather than VOP_BMAP, 1730 * to determine how large a block it can write at once (though it does 1731 * still use VOP_BMAP to find holes in the file); 1732 * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks 1733 * (leaving lfs_writeseg to deal with the cluster blocks, so we might 1734 * now have clusters of clusters, ick.) 1735 */ 1736 static int 1737 lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, 1738 int flags) 1739 { 1740 int i, error, run, haveeof = 0; 1741 int fs_bshift; 1742 vaddr_t kva; 1743 off_t eof, offset, startoffset = 0; 1744 size_t bytes, iobytes, skipbytes; 1745 bool async = (flags & PGO_SYNCIO) == 0; 1746 daddr_t lbn, blkno; 1747 struct vm_page *pg; 1748 struct buf *mbp, *bp; 1749 struct vnode *devvp = VTOI(vp)->i_devvp; 1750 struct inode *ip = VTOI(vp); 1751 struct lfs *fs = ip->i_lfs; 1752 struct segment *sp = fs->lfs_sp; 1753 UVMHIST_FUNC("lfs_gop_write"); UVMHIST_CALLED(ubchist); 1754 const char * failreason = NULL; 1755 1756 ASSERT_SEGLOCK(fs); 1757 1758 /* The Ifile lives in the buffer cache */ 1759 KASSERT(vp != fs->lfs_ivnode); 1760 1761 /* 1762 * We don't want to fill the disk before the cleaner has a chance 1763 * to make room for us. If we're in danger of doing that, fail 1764 * with EAGAIN. The caller will have to notice this, unlock 1765 * so the cleaner can run, relock and try again. 1766 * 1767 * We must write everything, however, if our vnode is being 1768 * reclaimed. 1769 */ 1770 if (LFS_STARVED_FOR_SEGS(fs) && !(vp->v_iflag & VI_XLOCK)) { 1771 failreason = "Starved for segs and not flushing vp"; 1772 goto tryagain; 1773 } 1774 1775 /* 1776 * Sometimes things slip past the filters in lfs_putpages, 1777 * and the pagedaemon tries to write pages---problem is 1778 * that the pagedaemon never acquires the segment lock. 1779 * 1780 * Alternatively, pages that were clean when we called 1781 * genfs_putpages may have become dirty in the meantime. In this 1782 * case the segment header is not properly set up for blocks 1783 * to be added to it. 1784 * 1785 * Unbusy and unclean the pages, and put them on the ACTIVE 1786 * queue under the hypothesis that they couldn't have got here 1787 * unless they were modified *quite* recently. 1788 * 1789 * XXXUBC that last statement is an oversimplification of course. 1790 */ 1791 if (!LFS_SEGLOCK_HELD(fs)) { 1792 failreason = "Seglock not held"; 1793 goto tryagain; 1794 } 1795 if (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) { 1796 failreason = "Inode with no_gop_write"; 1797 goto tryagain; 1798 } 1799 if ((pgs[0]->offset & fs->lfs_bmask) != 0) { 1800 failreason = "Bad page offset"; 1801 goto tryagain; 1802 } 1803 1804 UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x", 1805 vp, pgs, npages, flags); 1806 1807 GOP_SIZE(vp, vp->v_size, &eof, 0); 1808 haveeof = 1; 1809 1810 if (vp->v_type == VREG) 1811 fs_bshift = vp->v_mount->mnt_fs_bshift; 1812 else 1813 fs_bshift = DEV_BSHIFT; 1814 error = 0; 1815 pg = pgs[0]; 1816 startoffset = pg->offset; 1817 KASSERT(eof >= 0); 1818 1819 if (startoffset >= eof) { 1820 failreason = "Offset beyond EOF"; 1821 goto tryagain; 1822 } else 1823 bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); 1824 skipbytes = 0; 1825 1826 KASSERT(bytes != 0); 1827 1828 /* Swap PG_DELWRI for PG_PAGEOUT */ 1829 for (i = 0; i < npages; i++) { 1830 if (pgs[i]->flags & PG_DELWRI) { 1831 KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); 1832 pgs[i]->flags &= ~PG_DELWRI; 1833 pgs[i]->flags |= PG_PAGEOUT; 1834 uvm_pageout_start(1); 1835 mutex_enter(vp->v_interlock); 1836 mutex_enter(&uvm_pageqlock); 1837 uvm_pageunwire(pgs[i]); 1838 mutex_exit(&uvm_pageqlock); 1839 mutex_exit(vp->v_interlock); 1840 } 1841 } 1842 1843 /* 1844 * Check to make sure we're starting on a block boundary. 1845 * We'll check later to make sure we always write entire 1846 * blocks (or fragments). 1847 */ 1848 if (startoffset & fs->lfs_bmask) 1849 printf("%" PRId64 " & %" PRId64 " = %" PRId64 "\n", 1850 startoffset, fs->lfs_bmask, 1851 startoffset & fs->lfs_bmask); 1852 KASSERT((startoffset & fs->lfs_bmask) == 0); 1853 if (bytes & fs->lfs_ffmask) { 1854 printf("lfs_gop_write: asked to write %ld bytes\n", (long)bytes); 1855 panic("lfs_gop_write: non-integer blocks"); 1856 } 1857 1858 /* 1859 * We could deadlock here on pager_map with UVMPAGER_MAPIN_WAITOK. 1860 * If we would, write what we have and try again. If we don't 1861 * have anything to write, we'll have to sleep. 1862 */ 1863 if ((kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 1864 (((SEGSUM *)(sp->segsum))->ss_nfinfo < 1 ? 1865 UVMPAGER_MAPIN_WAITOK : 0))) == 0x0) { 1866 DLOG((DLOG_PAGE, "lfs_gop_write: forcing write\n")); 1867 #if 0 1868 " with nfinfo=%d at offset 0x%x\n", 1869 (int)((SEGSUM *)(sp->segsum))->ss_nfinfo, 1870 (unsigned)fs->lfs_offset)); 1871 #endif 1872 lfs_updatemeta(sp); 1873 lfs_release_finfo(fs); 1874 (void) lfs_writeseg(fs, sp); 1875 1876 lfs_acquire_finfo(fs, ip->i_number, ip->i_gen); 1877 1878 /* 1879 * Having given up all of the pager_map we were holding, 1880 * we can now wait for aiodoned to reclaim it for us 1881 * without fear of deadlock. 1882 */ 1883 kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 1884 UVMPAGER_MAPIN_WAITOK); 1885 } 1886 1887 mbp = getiobuf(NULL, true); 1888 UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x", 1889 vp, mbp, vp->v_numoutput, bytes); 1890 mbp->b_bufsize = npages << PAGE_SHIFT; 1891 mbp->b_data = (void *)kva; 1892 mbp->b_resid = mbp->b_bcount = bytes; 1893 mbp->b_cflags = BC_BUSY|BC_AGE; 1894 mbp->b_iodone = uvm_aio_biodone; 1895 1896 bp = NULL; 1897 for (offset = startoffset; 1898 bytes > 0; 1899 offset += iobytes, bytes -= iobytes) { 1900 lbn = offset >> fs_bshift; 1901 error = ulfs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, 1902 lfs_issequential_hole); 1903 if (error) { 1904 UVMHIST_LOG(ubchist, "ulfs_bmaparray() -> %d", 1905 error,0,0,0); 1906 skipbytes += bytes; 1907 bytes = 0; 1908 break; 1909 } 1910 1911 iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, 1912 bytes); 1913 if (blkno == (daddr_t)-1) { 1914 skipbytes += iobytes; 1915 continue; 1916 } 1917 1918 /* 1919 * Discover how much we can really pack into this buffer. 1920 */ 1921 /* If no room in the current segment, finish it up */ 1922 if (sp->sum_bytes_left < sizeof(int32_t) || 1923 sp->seg_bytes_left < (1 << fs->lfs_bshift)) { 1924 int vers; 1925 1926 lfs_updatemeta(sp); 1927 vers = sp->fip->fi_version; 1928 lfs_release_finfo(fs); 1929 (void) lfs_writeseg(fs, sp); 1930 1931 lfs_acquire_finfo(fs, ip->i_number, vers); 1932 } 1933 /* Check both for space in segment and space in segsum */ 1934 iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) 1935 << fs_bshift); 1936 iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) 1937 << fs_bshift); 1938 KASSERT(iobytes > 0); 1939 1940 /* if it's really one i/o, don't make a second buf */ 1941 if (offset == startoffset && iobytes == bytes) { 1942 bp = mbp; 1943 /* 1944 * All the LFS output is done by the segwriter. It 1945 * will increment numoutput by one for all the bufs it 1946 * recieves. However this buffer needs one extra to 1947 * account for aiodone. 1948 */ 1949 mutex_enter(vp->v_interlock); 1950 vp->v_numoutput++; 1951 mutex_exit(vp->v_interlock); 1952 } else { 1953 bp = getiobuf(NULL, true); 1954 UVMHIST_LOG(ubchist, "vp %p bp %p num now %d", 1955 vp, bp, vp->v_numoutput, 0); 1956 nestiobuf_setup(mbp, bp, offset - pg->offset, iobytes); 1957 /* 1958 * LFS doesn't like async I/O here, dies with 1959 * an assert in lfs_bwrite(). Is that assert 1960 * valid? I retained non-async behaviour when 1961 * converted this to use nestiobuf --pooka 1962 */ 1963 bp->b_flags &= ~B_ASYNC; 1964 } 1965 1966 /* XXX This is silly ... is this necessary? */ 1967 mutex_enter(&bufcache_lock); 1968 mutex_enter(vp->v_interlock); 1969 bgetvp(vp, bp); 1970 mutex_exit(vp->v_interlock); 1971 mutex_exit(&bufcache_lock); 1972 1973 bp->b_lblkno = lfs_lblkno(fs, offset); 1974 bp->b_private = mbp; 1975 if (devvp->v_type == VBLK) { 1976 bp->b_dev = devvp->v_rdev; 1977 } 1978 VOP_BWRITE(bp->b_vp, bp); 1979 while (lfs_gatherblock(sp, bp, NULL)) 1980 continue; 1981 } 1982 1983 nestiobuf_done(mbp, skipbytes, error); 1984 if (skipbytes) { 1985 UVMHIST_LOG(ubchist, "skipbytes %d", skipbytes, 0,0,0); 1986 } 1987 UVMHIST_LOG(ubchist, "returning 0", 0,0,0,0); 1988 1989 if (!async) { 1990 /* Start a segment write. */ 1991 UVMHIST_LOG(ubchist, "flushing", 0,0,0,0); 1992 mutex_enter(&lfs_lock); 1993 lfs_flush(fs, 0, 1); 1994 mutex_exit(&lfs_lock); 1995 } 1996 1997 if ((sp->seg_flags & SEGM_SINGLE) && fs->lfs_curseg != fs->lfs_startseg) 1998 return EAGAIN; 1999 2000 return (0); 2001 2002 tryagain: 2003 /* 2004 * We can't write the pages, for whatever reason. 2005 * Clean up after ourselves, and make the caller try again. 2006 */ 2007 mutex_enter(vp->v_interlock); 2008 2009 /* Tell why we're here, if we know */ 2010 if (failreason != NULL) { 2011 DLOG((DLOG_PAGE, "lfs_gop_write: %s\n", failreason)); 2012 } 2013 if (haveeof && startoffset >= eof) { 2014 DLOG((DLOG_PAGE, "lfs_gop_write: ino %d start 0x%" PRIx64 2015 " eof 0x%" PRIx64 " npages=%d\n", VTOI(vp)->i_number, 2016 pgs[0]->offset, eof, npages)); 2017 } 2018 2019 mutex_enter(&uvm_pageqlock); 2020 for (i = 0; i < npages; i++) { 2021 pg = pgs[i]; 2022 2023 if (pg->flags & PG_PAGEOUT) 2024 uvm_pageout_done(1); 2025 if (pg->flags & PG_DELWRI) { 2026 uvm_pageunwire(pg); 2027 } 2028 uvm_pageactivate(pg); 2029 pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); 2030 DLOG((DLOG_PAGE, "pg[%d] = %p (vp %p off %" PRIx64 ")\n", i, pg, 2031 vp, pg->offset)); 2032 DLOG((DLOG_PAGE, "pg[%d]->flags = %x\n", i, pg->flags)); 2033 DLOG((DLOG_PAGE, "pg[%d]->pqflags = %x\n", i, pg->pqflags)); 2034 DLOG((DLOG_PAGE, "pg[%d]->uanon = %p\n", i, pg->uanon)); 2035 DLOG((DLOG_PAGE, "pg[%d]->uobject = %p\n", i, pg->uobject)); 2036 DLOG((DLOG_PAGE, "pg[%d]->wire_count = %d\n", i, 2037 pg->wire_count)); 2038 DLOG((DLOG_PAGE, "pg[%d]->loan_count = %d\n", i, 2039 pg->loan_count)); 2040 } 2041 /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ 2042 uvm_page_unbusy(pgs, npages); 2043 mutex_exit(&uvm_pageqlock); 2044 mutex_exit(vp->v_interlock); 2045 return EAGAIN; 2046 } 2047 2048 /* 2049 * finish vnode/inode initialization. 2050 * used by lfs_vget and lfs_fastvget. 2051 */ 2052 void 2053 lfs_vinit(struct mount *mp, struct vnode **vpp) 2054 { 2055 struct vnode *vp = *vpp; 2056 struct inode *ip = VTOI(vp); 2057 struct ulfsmount *ump = VFSTOULFS(mp); 2058 struct lfs *fs = ump->um_lfs; 2059 int i; 2060 2061 ip->i_mode = ip->i_ffs1_mode; 2062 ip->i_nlink = ip->i_ffs1_nlink; 2063 ip->i_lfs_osize = ip->i_size = ip->i_ffs1_size; 2064 ip->i_flags = ip->i_ffs1_flags; 2065 ip->i_gen = ip->i_ffs1_gen; 2066 ip->i_uid = ip->i_ffs1_uid; 2067 ip->i_gid = ip->i_ffs1_gid; 2068 2069 ip->i_lfs_effnblks = ip->i_ffs1_blocks; 2070 ip->i_lfs_odnlink = ip->i_ffs1_nlink; 2071 2072 /* 2073 * Initialize the vnode from the inode, check for aliases. In all 2074 * cases re-init ip, the underlying vnode/inode may have changed. 2075 */ 2076 ulfs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); 2077 ip = VTOI(vp); 2078 2079 memset(ip->i_lfs_fragsize, 0, ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); 2080 if (vp->v_type != VLNK || ip->i_size >= ip->i_lfs->um_maxsymlinklen) { 2081 #ifdef DEBUG 2082 for (i = (ip->i_size + fs->lfs_bsize - 1) >> fs->lfs_bshift; 2083 i < ULFS_NDADDR; i++) { 2084 if ((vp->v_type == VBLK || vp->v_type == VCHR) && 2085 i == 0) 2086 continue; 2087 if (ip->i_ffs1_db[i] != 0) { 2088 lfs_dump_dinode(ip->i_din.ffs1_din); 2089 panic("inconsistent inode (direct)"); 2090 } 2091 } 2092 for ( ; i < ULFS_NDADDR + ULFS_NIADDR; i++) { 2093 if (ip->i_ffs1_ib[i - ULFS_NDADDR] != 0) { 2094 lfs_dump_dinode(ip->i_din.ffs1_din); 2095 panic("inconsistent inode (indirect)"); 2096 } 2097 } 2098 #endif /* DEBUG */ 2099 for (i = 0; i < ULFS_NDADDR; i++) 2100 if (ip->i_ffs1_db[i] != 0) 2101 ip->i_lfs_fragsize[i] = lfs_blksize(fs, ip, i); 2102 } 2103 2104 #ifdef DIAGNOSTIC 2105 if (vp->v_type == VNON) { 2106 # ifdef DEBUG 2107 lfs_dump_dinode(ip->i_din.ffs1_din); 2108 # endif 2109 panic("lfs_vinit: ino %llu is type VNON! (ifmt=%o)\n", 2110 (unsigned long long)ip->i_number, 2111 (ip->i_mode & LFS_IFMT) >> 12); 2112 } 2113 #endif /* DIAGNOSTIC */ 2114 2115 /* 2116 * Finish inode initialization now that aliasing has been resolved. 2117 */ 2118 2119 ip->i_devvp = ump->um_devvp; 2120 vref(ip->i_devvp); 2121 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 2122 ulfsquota_init(ip); 2123 #endif 2124 genfs_node_init(vp, &lfs_genfsops); 2125 uvm_vnp_setsize(vp, ip->i_size); 2126 2127 /* Initialize hiblk from file size */ 2128 ip->i_lfs_hiblk = lfs_lblkno(ip->i_lfs, ip->i_size + ip->i_lfs->lfs_bsize - 1) - 1; 2129 2130 *vpp = vp; 2131 } 2132 2133 /* 2134 * Resize the filesystem to contain the specified number of segments. 2135 */ 2136 int 2137 lfs_resize_fs(struct lfs *fs, int newnsegs) 2138 { 2139 SEGUSE *sup; 2140 struct buf *bp, *obp; 2141 daddr_t olast, nlast, ilast, noff, start, end; 2142 struct vnode *ivp; 2143 struct inode *ip; 2144 int error, badnews, inc, oldnsegs; 2145 int sbbytes, csbbytes, gain, cgain; 2146 int i; 2147 2148 /* Only support v2 and up */ 2149 if (fs->lfs_version < 2) 2150 return EOPNOTSUPP; 2151 2152 /* If we're doing nothing, do it fast */ 2153 oldnsegs = fs->lfs_nseg; 2154 if (newnsegs == oldnsegs) 2155 return 0; 2156 2157 /* We always have to have two superblocks */ 2158 if (newnsegs <= lfs_dtosn(fs, fs->lfs_sboffs[1])) 2159 return EFBIG; 2160 2161 ivp = fs->lfs_ivnode; 2162 ip = VTOI(ivp); 2163 error = 0; 2164 2165 /* Take the segment lock so no one else calls lfs_newseg() */ 2166 lfs_seglock(fs, SEGM_PROT); 2167 2168 /* 2169 * Make sure the segments we're going to be losing, if any, 2170 * are in fact empty. We hold the seglock, so their status 2171 * cannot change underneath us. Count the superblocks we lose, 2172 * while we're at it. 2173 */ 2174 sbbytes = csbbytes = 0; 2175 cgain = 0; 2176 for (i = newnsegs; i < oldnsegs; i++) { 2177 LFS_SEGENTRY(sup, fs, i, bp); 2178 badnews = sup->su_nbytes || !(sup->su_flags & SEGUSE_INVAL); 2179 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2180 sbbytes += LFS_SBPAD; 2181 if (!(sup->su_flags & SEGUSE_DIRTY)) { 2182 ++cgain; 2183 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2184 csbbytes += LFS_SBPAD; 2185 } 2186 brelse(bp, 0); 2187 if (badnews) { 2188 error = EBUSY; 2189 goto out; 2190 } 2191 } 2192 2193 /* Note old and new segment table endpoints, and old ifile size */ 2194 olast = fs->lfs_cleansz + fs->lfs_segtabsz; 2195 nlast = howmany(newnsegs, fs->lfs_sepb) + fs->lfs_cleansz; 2196 ilast = ivp->v_size >> fs->lfs_bshift; 2197 noff = nlast - olast; 2198 2199 /* 2200 * Make sure no one can use the Ifile while we change it around. 2201 * Even after taking the iflock we need to make sure no one still 2202 * is holding Ifile buffers, so we get each one, to drain them. 2203 * (XXX this could be done better.) 2204 */ 2205 rw_enter(&fs->lfs_iflock, RW_WRITER); 2206 for (i = 0; i < ilast; i++) { 2207 /* XXX what to do if bread fails? */ 2208 bread(ivp, i, fs->lfs_bsize, NOCRED, 0, &bp); 2209 brelse(bp, 0); 2210 } 2211 2212 /* Allocate new Ifile blocks */ 2213 for (i = ilast; i < ilast + noff; i++) { 2214 if (lfs_balloc(ivp, i * fs->lfs_bsize, fs->lfs_bsize, NOCRED, 0, 2215 &bp) != 0) 2216 panic("balloc extending ifile"); 2217 memset(bp->b_data, 0, fs->lfs_bsize); 2218 VOP_BWRITE(bp->b_vp, bp); 2219 } 2220 2221 /* Register new ifile size */ 2222 ip->i_size += noff * fs->lfs_bsize; 2223 ip->i_ffs1_size = ip->i_size; 2224 uvm_vnp_setsize(ivp, ip->i_size); 2225 2226 /* Copy the inode table to its new position */ 2227 if (noff != 0) { 2228 if (noff < 0) { 2229 start = nlast; 2230 end = ilast + noff; 2231 inc = 1; 2232 } else { 2233 start = ilast + noff - 1; 2234 end = nlast - 1; 2235 inc = -1; 2236 } 2237 for (i = start; i != end; i += inc) { 2238 if (bread(ivp, i, fs->lfs_bsize, NOCRED, 2239 B_MODIFY, &bp) != 0) 2240 panic("resize: bread dst blk failed"); 2241 if (bread(ivp, i - noff, fs->lfs_bsize, 2242 NOCRED, 0, &obp)) 2243 panic("resize: bread src blk failed"); 2244 memcpy(bp->b_data, obp->b_data, fs->lfs_bsize); 2245 VOP_BWRITE(bp->b_vp, bp); 2246 brelse(obp, 0); 2247 } 2248 } 2249 2250 /* If we are expanding, write the new empty SEGUSE entries */ 2251 if (newnsegs > oldnsegs) { 2252 for (i = oldnsegs; i < newnsegs; i++) { 2253 if ((error = bread(ivp, i / fs->lfs_sepb + 2254 fs->lfs_cleansz, fs->lfs_bsize, 2255 NOCRED, B_MODIFY, &bp)) != 0) 2256 panic("lfs: ifile read: %d", error); 2257 while ((i + 1) % fs->lfs_sepb && i < newnsegs) { 2258 sup = &((SEGUSE *)bp->b_data)[i % fs->lfs_sepb]; 2259 memset(sup, 0, sizeof(*sup)); 2260 i++; 2261 } 2262 VOP_BWRITE(bp->b_vp, bp); 2263 } 2264 } 2265 2266 /* Zero out unused superblock offsets */ 2267 for (i = 2; i < LFS_MAXNUMSB; i++) 2268 if (lfs_dtosn(fs, fs->lfs_sboffs[i]) >= newnsegs) 2269 fs->lfs_sboffs[i] = 0x0; 2270 2271 /* 2272 * Correct superblock entries that depend on fs size. 2273 * The computations of these are as follows: 2274 * 2275 * size = lfs_segtod(fs, nseg) 2276 * dsize = lfs_segtod(fs, nseg - minfreeseg) - lfs_btofsb(#super * LFS_SBPAD) 2277 * bfree = dsize - lfs_btofsb(fs, bsize * nseg / 2) - blocks_actually_used 2278 * avail = lfs_segtod(fs, nclean) - lfs_btofsb(#clean_super * LFS_SBPAD) 2279 * + (lfs_segtod(fs, 1) - (offset - curseg)) 2280 * - lfs_segtod(fs, minfreeseg - (minfreeseg / 2)) 2281 * 2282 * XXX - we should probably adjust minfreeseg as well. 2283 */ 2284 gain = (newnsegs - oldnsegs); 2285 fs->lfs_nseg = newnsegs; 2286 fs->lfs_segtabsz = nlast - fs->lfs_cleansz; 2287 fs->lfs_size += gain * lfs_btofsb(fs, fs->lfs_ssize); 2288 fs->lfs_dsize += gain * lfs_btofsb(fs, fs->lfs_ssize) - lfs_btofsb(fs, sbbytes); 2289 fs->lfs_bfree += gain * lfs_btofsb(fs, fs->lfs_ssize) - lfs_btofsb(fs, sbbytes) 2290 - gain * lfs_btofsb(fs, fs->lfs_bsize / 2); 2291 if (gain > 0) { 2292 fs->lfs_nclean += gain; 2293 fs->lfs_avail += gain * lfs_btofsb(fs, fs->lfs_ssize); 2294 } else { 2295 fs->lfs_nclean -= cgain; 2296 fs->lfs_avail -= cgain * lfs_btofsb(fs, fs->lfs_ssize) - 2297 lfs_btofsb(fs, csbbytes); 2298 } 2299 2300 /* Resize segment flag cache */ 2301 fs->lfs_suflags[0] = realloc(fs->lfs_suflags[0], 2302 fs->lfs_nseg * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2303 fs->lfs_suflags[1] = realloc(fs->lfs_suflags[1], 2304 fs->lfs_nseg * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2305 for (i = oldnsegs; i < newnsegs; i++) 2306 fs->lfs_suflags[0][i] = fs->lfs_suflags[1][i] = 0x0; 2307 2308 /* Truncate Ifile if necessary */ 2309 if (noff < 0) 2310 lfs_truncate(ivp, ivp->v_size + (noff << fs->lfs_bshift), 0, 2311 NOCRED); 2312 2313 /* Update cleaner info so the cleaner can die */ 2314 /* XXX what to do if bread fails? */ 2315 bread(ivp, 0, fs->lfs_bsize, NOCRED, B_MODIFY, &bp); 2316 ((CLEANERINFO *)bp->b_data)->clean = fs->lfs_nclean; 2317 ((CLEANERINFO *)bp->b_data)->dirty = fs->lfs_nseg - fs->lfs_nclean; 2318 VOP_BWRITE(bp->b_vp, bp); 2319 2320 /* Let Ifile accesses proceed */ 2321 rw_exit(&fs->lfs_iflock); 2322 2323 out: 2324 lfs_segunlock(fs); 2325 return error; 2326 } 2327 2328 /* 2329 * Extended attribute dispatch 2330 */ 2331 static int 2332 lfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2333 int attrnamespace, const char *attrname) 2334 { 2335 #ifdef LFS_EXTATTR 2336 struct ulfsmount *ump; 2337 2338 ump = VFSTOULFS(mp); 2339 if (ump->um_fstype == ULFS1) { 2340 return ulfs_extattrctl(mp, cmd, vp, attrnamespace, attrname); 2341 } 2342 #endif 2343 return vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname); 2344 } 2345