1 /* $NetBSD: lfs_vfsops.c,v 1.349 2015/10/19 04:22:18 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 1.349 2015/10/19 04:22:18 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_bswap.h> 105 #include <ufs/lfs/ulfs_extern.h> 106 107 #include <uvm/uvm.h> 108 #include <uvm/uvm_stat.h> 109 #include <uvm/uvm_pager.h> 110 #include <uvm/uvm_pdaemon.h> 111 112 #include <ufs/lfs/lfs.h> 113 #include <ufs/lfs/lfs_accessors.h> 114 #include <ufs/lfs/lfs_kernel.h> 115 #include <ufs/lfs/lfs_extern.h> 116 117 #include <miscfs/genfs/genfs.h> 118 #include <miscfs/genfs/genfs_node.h> 119 120 MODULE(MODULE_CLASS_VFS, lfs, NULL); 121 122 static int lfs_gop_write(struct vnode *, struct vm_page **, int, int); 123 static int lfs_mountfs(struct vnode *, struct mount *, struct lwp *); 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_loadvnode = lfs_loadvnode, 157 .vfs_newvnode = lfs_newvnode, 158 .vfs_fhtovp = lfs_fhtovp, 159 .vfs_vptofh = lfs_vptofh, 160 .vfs_init = lfs_init, 161 .vfs_reinit = lfs_reinit, 162 .vfs_done = lfs_done, 163 .vfs_mountroot = lfs_mountroot, 164 .vfs_snapshot = (void *)eopnotsupp, 165 .vfs_extattrctl = lfs_extattrctl, 166 .vfs_suspendctl = (void *)eopnotsupp, 167 .vfs_renamelock_enter = genfs_renamelock_enter, 168 .vfs_renamelock_exit = genfs_renamelock_exit, 169 .vfs_fsync = (void *)eopnotsupp, 170 .vfs_opv_descs = lfs_vnodeopv_descs 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 being dead" }, 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, "lfs", 252 SYSCTL_DESCR("Log-structured file system"), 253 NULL, 0, NULL, 0, 254 CTL_VFS, 5, CTL_EOL); 255 /* 256 * XXX the "5" above could be dynamic, thereby eliminating one 257 * more instance of the "number to vfs" mapping problem, but 258 * "5" is the order as taken from sys/mount.h 259 */ 260 261 sysctl_createv(clog, 0, NULL, NULL, 262 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 263 CTLTYPE_INT, "flushindir", NULL, 264 NULL, 0, &lfs_writeindir, 0, 265 CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); 266 sysctl_createv(clog, 0, NULL, NULL, 267 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 268 CTLTYPE_INT, "clean_vnhead", NULL, 269 NULL, 0, &lfs_clean_vnhead, 0, 270 CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); 271 sysctl_createv(clog, 0, NULL, NULL, 272 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 273 CTLTYPE_INT, "dostats", 274 SYSCTL_DESCR("Maintain statistics on LFS operations"), 275 sysctl_lfs_dostats, 0, &lfs_dostats, 0, 276 CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); 277 sysctl_createv(clog, 0, NULL, NULL, 278 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 279 CTLTYPE_INT, "pagetrip", 280 SYSCTL_DESCR("How many dirty pages in fs triggers" 281 " a flush"), 282 NULL, 0, &lfs_fs_pagetrip, 0, 283 CTL_VFS, 5, LFS_FS_PAGETRIP, CTL_EOL); 284 sysctl_createv(clog, 0, NULL, NULL, 285 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 286 CTLTYPE_INT, "ignore_lazy_sync", 287 SYSCTL_DESCR("Lazy Sync is ignored entirely"), 288 NULL, 0, &lfs_ignore_lazy_sync, 0, 289 CTL_VFS, 5, LFS_IGNORE_LAZY_SYNC, CTL_EOL); 290 #ifdef LFS_KERNEL_RFW 291 sysctl_createv(clog, 0, NULL, NULL, 292 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 293 CTLTYPE_INT, "rfw", 294 SYSCTL_DESCR("Use in-kernel roll-forward on mount"), 295 NULL, 0, &lfs_do_rfw, 0, 296 CTL_VFS, 5, LFS_DO_RFW, CTL_EOL); 297 #endif 298 299 sysctl_createv(clog, 0, NULL, NULL, 300 CTLFLAG_PERMANENT, 301 CTLTYPE_NODE, "stats", 302 SYSCTL_DESCR("Debugging options"), 303 NULL, 0, NULL, 0, 304 CTL_VFS, 5, LFS_STATS, CTL_EOL); 305 for (i = 0; i < sizeof(struct lfs_stats) / sizeof(u_int); i++) { 306 sysctl_createv(clog, 0, NULL, NULL, 307 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 308 CTLTYPE_INT, stat_names[i].sname, 309 SYSCTL_DESCR(stat_names[i].lname), 310 NULL, 0, &(((u_int *)&lfs_stats.segsused)[i]), 311 0, CTL_VFS, 5, LFS_STATS, i, CTL_EOL); 312 } 313 314 #ifdef DEBUG 315 sysctl_createv(clog, 0, NULL, NULL, 316 CTLFLAG_PERMANENT, 317 CTLTYPE_NODE, "debug", 318 SYSCTL_DESCR("Debugging options"), 319 NULL, 0, NULL, 0, 320 CTL_VFS, 5, LFS_DEBUGLOG, CTL_EOL); 321 for (i = 0; i < DLOG_MAX; i++) { 322 sysctl_createv(clog, 0, NULL, NULL, 323 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 324 CTLTYPE_INT, dlog_names[i].sname, 325 SYSCTL_DESCR(dlog_names[i].lname), 326 NULL, 0, &(lfs_debug_log_subsys[i]), 0, 327 CTL_VFS, 5, LFS_DEBUGLOG, i, CTL_EOL); 328 } 329 #endif 330 } 331 332 /* old cleaner syscall interface. see VOP_FCNTL() */ 333 static const struct syscall_package lfs_syscalls[] = { 334 { SYS_lfs_bmapv, 0, (sy_call_t *)sys_lfs_bmapv }, 335 { SYS_lfs_markv, 0, (sy_call_t *)sys_lfs_markv }, 336 { SYS___lfs_segwait50, 0, (sy_call_t *)sys___lfs_segwait50 }, 337 { SYS_lfs_segclean, 0, (sy_call_t *)sys_lfs_segclean }, 338 { 0, 0, NULL }, 339 }; 340 341 static int 342 lfs_modcmd(modcmd_t cmd, void *arg) 343 { 344 int error; 345 346 switch (cmd) { 347 case MODULE_CMD_INIT: 348 error = syscall_establish(NULL, lfs_syscalls); 349 if (error) 350 return error; 351 error = vfs_attach(&lfs_vfsops); 352 if (error != 0) { 353 syscall_disestablish(NULL, lfs_syscalls); 354 break; 355 } 356 lfs_sysctl_setup(&lfs_sysctl_log); 357 break; 358 case MODULE_CMD_FINI: 359 error = vfs_detach(&lfs_vfsops); 360 if (error != 0) 361 break; 362 syscall_disestablish(NULL, lfs_syscalls); 363 sysctl_teardown(&lfs_sysctl_log); 364 break; 365 default: 366 error = ENOTTY; 367 break; 368 } 369 370 return (error); 371 } 372 373 /* 374 * XXX Same structure as FFS inodes? Should we share a common pool? 375 */ 376 struct pool lfs_inode_pool; 377 struct pool lfs_dinode_pool; 378 struct pool lfs_inoext_pool; 379 struct pool lfs_lbnentry_pool; 380 381 /* 382 * The writer daemon. UVM keeps track of how many dirty pages we are holding 383 * in lfs_subsys_pages; the daemon flushes the filesystem when this value 384 * crosses the (user-defined) threshhold LFS_MAX_PAGES. 385 */ 386 static void 387 lfs_writerd(void *arg) 388 { 389 struct mount *mp, *nmp; 390 struct lfs *fs; 391 struct vfsops *vfs = NULL; 392 int fsflags; 393 int skipc; 394 int lfsc; 395 int wrote_something = 0; 396 397 mutex_enter(&lfs_lock); 398 lfs_writer_daemon = curproc->p_pid; 399 lfs_writer_lid = curlwp->l_lid; 400 mutex_exit(&lfs_lock); 401 402 /* Take an extra reference to the LFS vfsops. */ 403 vfs = vfs_getopsbyname(MOUNT_LFS); 404 405 mutex_enter(&lfs_lock); 406 for (;;) { 407 KASSERT(mutex_owned(&lfs_lock)); 408 if (wrote_something == 0) 409 mtsleep(&lfs_writer_daemon, PVM, "lfswriter", hz/10 + 1, 410 &lfs_lock); 411 412 KASSERT(mutex_owned(&lfs_lock)); 413 wrote_something = 0; 414 415 /* 416 * If global state wants a flush, flush everything. 417 */ 418 if (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || 419 locked_queue_bytes > LFS_MAX_BYTES || 420 lfs_subsys_pages > LFS_MAX_PAGES) { 421 422 if (lfs_do_flush) { 423 DLOG((DLOG_FLUSH, "lfs_writerd: lfs_do_flush\n")); 424 } 425 if (locked_queue_count > LFS_MAX_BUFS) { 426 DLOG((DLOG_FLUSH, "lfs_writerd: lqc = %d, max %d\n", 427 locked_queue_count, LFS_MAX_BUFS)); 428 } 429 if (locked_queue_bytes > LFS_MAX_BYTES) { 430 DLOG((DLOG_FLUSH, "lfs_writerd: lqb = %ld, max %ld\n", 431 locked_queue_bytes, LFS_MAX_BYTES)); 432 } 433 if (lfs_subsys_pages > LFS_MAX_PAGES) { 434 DLOG((DLOG_FLUSH, "lfs_writerd: lssp = %d, max %d\n", 435 lfs_subsys_pages, LFS_MAX_PAGES)); 436 } 437 438 lfs_flush(NULL, SEGM_WRITERD, 0); 439 lfs_do_flush = 0; 440 KASSERT(mutex_owned(&lfs_lock)); 441 continue; 442 } 443 KASSERT(mutex_owned(&lfs_lock)); 444 mutex_exit(&lfs_lock); 445 446 /* 447 * Look through the list of LFSs to see if any of them 448 * have requested pageouts. 449 */ 450 mutex_enter(&mountlist_lock); 451 lfsc = 0; 452 skipc = 0; 453 for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { 454 if (vfs_busy(mp, &nmp)) { 455 ++skipc; 456 continue; 457 } 458 KASSERT(!mutex_owned(&lfs_lock)); 459 if (strncmp(mp->mnt_stat.f_fstypename, MOUNT_LFS, 460 sizeof(mp->mnt_stat.f_fstypename)) == 0) { 461 ++lfsc; 462 fs = VFSTOULFS(mp)->um_lfs; 463 daddr_t ooffset = 0; 464 fsflags = SEGM_SINGLE; 465 466 mutex_enter(&lfs_lock); 467 ooffset = lfs_sb_getoffset(fs); 468 469 if (lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs) && fs->lfs_nowrap) { 470 /* Don't try to write if we're suspended */ 471 mutex_exit(&lfs_lock); 472 vfs_unbusy(mp, false, &nmp); 473 continue; 474 } 475 if (LFS_STARVED_FOR_SEGS(fs)) { 476 mutex_exit(&lfs_lock); 477 478 DLOG((DLOG_FLUSH, "lfs_writerd: need cleaning before writing possible\n")); 479 lfs_wakeup_cleaner(fs); 480 vfs_unbusy(mp, false, &nmp); 481 continue; 482 } 483 484 if ((fs->lfs_dirvcount > LFS_MAX_FSDIROP(fs) || 485 lfs_dirvcount > LFS_MAX_DIROP) && 486 fs->lfs_dirops == 0) { 487 fsflags &= ~SEGM_SINGLE; 488 fsflags |= SEGM_CKP; 489 DLOG((DLOG_FLUSH, "lfs_writerd: checkpoint\n")); 490 lfs_flush_fs(fs, fsflags); 491 } else if (fs->lfs_pdflush) { 492 DLOG((DLOG_FLUSH, "lfs_writerd: pdflush set\n")); 493 lfs_flush_fs(fs, fsflags); 494 } else if (!TAILQ_EMPTY(&fs->lfs_pchainhd)) { 495 DLOG((DLOG_FLUSH, "lfs_writerd: pchain non-empty\n")); 496 mutex_exit(&lfs_lock); 497 lfs_writer_enter(fs, "wrdirop"); 498 lfs_flush_pchain(fs); 499 lfs_writer_leave(fs); 500 mutex_enter(&lfs_lock); 501 } 502 if (lfs_sb_getoffset(fs) != ooffset) 503 ++wrote_something; 504 mutex_exit(&lfs_lock); 505 } 506 KASSERT(!mutex_owned(&lfs_lock)); 507 vfs_unbusy(mp, false, &nmp); 508 } 509 if (lfsc + skipc == 0) { 510 mutex_enter(&lfs_lock); 511 lfs_writer_daemon = 0; 512 lfs_writer_lid = 0; 513 mutex_exit(&lfs_lock); 514 mutex_exit(&mountlist_lock); 515 break; 516 } 517 mutex_exit(&mountlist_lock); 518 519 mutex_enter(&lfs_lock); 520 } 521 KASSERT(!mutex_owned(&lfs_lock)); 522 KASSERT(!mutex_owned(&mountlist_lock)); 523 524 /* Give up our extra reference so the module can be unloaded. */ 525 mutex_enter(&vfs_list_lock); 526 if (vfs != NULL) 527 vfs->vfs_refcount--; 528 mutex_exit(&vfs_list_lock); 529 530 /* Done! */ 531 kthread_exit(0); 532 } 533 534 /* 535 * Initialize the filesystem, most work done by ulfs_init. 536 */ 537 void 538 lfs_init(void) 539 { 540 541 /* 542 * XXX: should we use separate pools for 32-bit and 64-bit 543 * dinodes? 544 */ 545 malloc_type_attach(M_SEGMENT); 546 pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, 547 "lfsinopl", &pool_allocator_nointr, IPL_NONE); 548 pool_init(&lfs_dinode_pool, sizeof(union lfs_dinode), 0, 0, 0, 549 "lfsdinopl", &pool_allocator_nointr, IPL_NONE); 550 pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, 551 "lfsinoextpl", &pool_allocator_nointr, IPL_NONE); 552 pool_init(&lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, 553 "lfslbnpool", &pool_allocator_nointr, IPL_NONE); 554 ulfs_init(); 555 556 #ifdef DEBUG 557 memset(lfs_log, 0, sizeof(lfs_log)); 558 #endif 559 mutex_init(&lfs_lock, MUTEX_DEFAULT, IPL_NONE); 560 cv_init(&locked_queue_cv, "lfsbuf"); 561 cv_init(&lfs_writing_cv, "lfsflush"); 562 } 563 564 void 565 lfs_reinit(void) 566 { 567 ulfs_reinit(); 568 } 569 570 void 571 lfs_done(void) 572 { 573 ulfs_done(); 574 mutex_destroy(&lfs_lock); 575 cv_destroy(&locked_queue_cv); 576 cv_destroy(&lfs_writing_cv); 577 pool_destroy(&lfs_inode_pool); 578 pool_destroy(&lfs_dinode_pool); 579 pool_destroy(&lfs_inoext_pool); 580 pool_destroy(&lfs_lbnentry_pool); 581 malloc_type_detach(M_SEGMENT); 582 } 583 584 /* 585 * Called by main() when ulfs is going to be mounted as root. 586 */ 587 int 588 lfs_mountroot(void) 589 { 590 extern struct vnode *rootvp; 591 struct lfs *fs = NULL; /* LFS */ 592 struct mount *mp; 593 struct lwp *l = curlwp; 594 struct ulfsmount *ump; 595 int error; 596 597 if (device_class(root_device) != DV_DISK) 598 return (ENODEV); 599 600 if (rootdev == NODEV) 601 return (ENODEV); 602 if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device", &mp))) { 603 vrele(rootvp); 604 return (error); 605 } 606 if ((error = lfs_mountfs(rootvp, mp, l))) { 607 vfs_unbusy(mp, false, NULL); 608 vfs_destroy(mp); 609 return (error); 610 } 611 mountlist_append(mp); 612 ump = VFSTOULFS(mp); 613 fs = ump->um_lfs; 614 lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); 615 (void)lfs_statvfs(mp, &mp->mnt_stat); 616 vfs_unbusy(mp, false, NULL); 617 setrootfstime((time_t)lfs_sb_gettstamp(VFSTOULFS(mp)->um_lfs)); 618 return (0); 619 } 620 621 /* 622 * VFS Operations. 623 * 624 * mount system call 625 */ 626 int 627 lfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 628 { 629 struct lwp *l = curlwp; 630 struct vnode *devvp; 631 struct ulfs_args *args = data; 632 struct ulfsmount *ump = NULL; 633 struct lfs *fs = NULL; /* LFS */ 634 int error = 0, update; 635 mode_t accessmode; 636 637 if (args == NULL) 638 return EINVAL; 639 if (*data_len < sizeof *args) 640 return EINVAL; 641 642 if (mp->mnt_flag & MNT_GETARGS) { 643 ump = VFSTOULFS(mp); 644 if (ump == NULL) 645 return EIO; 646 args->fspec = NULL; 647 *data_len = sizeof *args; 648 return 0; 649 } 650 651 update = mp->mnt_flag & MNT_UPDATE; 652 653 /* Check arguments */ 654 if (args->fspec != NULL) { 655 /* 656 * Look up the name and verify that it's sane. 657 */ 658 error = namei_simple_user(args->fspec, 659 NSM_FOLLOW_NOEMULROOT, &devvp); 660 if (error != 0) 661 return (error); 662 663 if (!update) { 664 /* 665 * Be sure this is a valid block device 666 */ 667 if (devvp->v_type != VBLK) 668 error = ENOTBLK; 669 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 670 error = ENXIO; 671 } else { 672 /* 673 * Be sure we're still naming the same device 674 * used for our initial mount 675 * 676 * XXX dholland 20151010: if namei gives us a 677 * different vnode for the same device, 678 * wouldn't it be better to use it going 679 * forward rather than ignore it in favor of 680 * the old one? 681 */ 682 ump = VFSTOULFS(mp); 683 fs = ump->um_lfs; 684 if (devvp != fs->lfs_devvp) { 685 if (devvp->v_rdev != fs->lfs_devvp->v_rdev) 686 error = EINVAL; 687 else { 688 vrele(devvp); 689 devvp = fs->lfs_devvp; 690 vref(devvp); 691 } 692 } 693 } 694 } else { 695 if (!update) { 696 /* New mounts must have a filename for the device */ 697 return (EINVAL); 698 } else { 699 /* Use the extant mount */ 700 ump = VFSTOULFS(mp); 701 fs = ump->um_lfs; 702 devvp = fs->lfs_devvp; 703 vref(devvp); 704 } 705 } 706 707 708 /* 709 * If mount by non-root, then verify that user has necessary 710 * permissions on the device. 711 */ 712 if (error == 0) { 713 accessmode = VREAD; 714 if (update ? 715 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 716 (mp->mnt_flag & MNT_RDONLY) == 0) 717 accessmode |= VWRITE; 718 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 719 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 720 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 721 KAUTH_ARG(accessmode)); 722 VOP_UNLOCK(devvp); 723 } 724 725 if (error) { 726 vrele(devvp); 727 return (error); 728 } 729 730 if (!update) { 731 int flags; 732 733 if (mp->mnt_flag & MNT_RDONLY) 734 flags = FREAD; 735 else 736 flags = FREAD|FWRITE; 737 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 738 error = VOP_OPEN(devvp, flags, FSCRED); 739 VOP_UNLOCK(devvp); 740 if (error) 741 goto fail; 742 error = lfs_mountfs(devvp, mp, l); /* LFS */ 743 if (error) { 744 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 745 (void)VOP_CLOSE(devvp, flags, NOCRED); 746 VOP_UNLOCK(devvp); 747 goto fail; 748 } 749 750 ump = VFSTOULFS(mp); 751 fs = ump->um_lfs; 752 } else { 753 /* 754 * Update the mount. 755 */ 756 757 /* 758 * The initial mount got a reference on this 759 * device, so drop the one obtained via 760 * namei(), above. 761 */ 762 vrele(devvp); 763 764 ump = VFSTOULFS(mp); 765 fs = ump->um_lfs; 766 767 if (fs->lfs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 768 /* 769 * Changing from read/write to read-only. 770 * XXX: shouldn't we sync here? or does vfs do that? 771 */ 772 #ifdef LFS_QUOTA2 773 /* XXX: quotas should remain on when readonly */ 774 if (fs->lfs_use_quota2) { 775 error = lfsquota2_umount(mp, 0); 776 if (error) { 777 return error; 778 } 779 } 780 #endif 781 } 782 783 if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 784 /* 785 * Changing from read-only to read/write. 786 * Note in the superblocks that we're writing. 787 */ 788 789 /* XXX: quotas should have been on even if readonly */ 790 if (fs->lfs_use_quota2) { 791 #ifdef LFS_QUOTA2 792 error = lfs_quota2_mount(mp); 793 #else 794 uprintf("%s: no kernel support for this " 795 "filesystem's quotas\n", 796 mp->mnt_stat.f_mntonname); 797 if (mp->mnt_flag & MNT_FORCE) { 798 uprintf("%s: mounting anyway; " 799 "fsck afterwards\n", 800 mp->mnt_stat.f_mntonname); 801 } else { 802 error = EINVAL; 803 } 804 #endif 805 if (error) { 806 return error; 807 } 808 } 809 810 fs->lfs_ronly = 0; 811 if (lfs_sb_getpflags(fs) & LFS_PF_CLEAN) { 812 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); 813 lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); 814 lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); 815 } 816 } 817 if (args->fspec == NULL) 818 return EINVAL; 819 } 820 821 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 822 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 823 if (error == 0) 824 lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); 825 return error; 826 827 fail: 828 vrele(devvp); 829 return (error); 830 } 831 832 /* 833 * Helper for mountfs. Note that the fs pointer may be a dummy one 834 * pointing into a superblock buffer. (Which is gross; see below.) 835 */ 836 static int 837 lfs_checkmagic(struct lfs *fs) 838 { 839 switch (fs->lfs_dlfs_u.u_32.dlfs_magic) { 840 case LFS_MAGIC: 841 fs->lfs_is64 = false; 842 fs->lfs_dobyteswap = false; 843 break; 844 case LFS64_MAGIC: 845 fs->lfs_is64 = true; 846 fs->lfs_dobyteswap = false; 847 break; 848 #ifdef LFS_EI 849 case LFS_MAGIC_SWAPPED: 850 fs->lfs_is64 = false; 851 fs->lfs_dobyteswap = true; 852 break; 853 case LFS64_MAGIC_SWAPPED: 854 fs->lfs_is64 = true; 855 fs->lfs_dobyteswap = true; 856 break; 857 #endif 858 default: 859 /* XXX needs translation */ 860 return EINVAL; 861 } 862 return 0; 863 } 864 865 /* 866 * Common code for mount and mountroot 867 * LFS specific 868 */ 869 int 870 lfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 871 { 872 struct lfs *primarysb, *altsb, *thesb; 873 struct buf *primarybuf, *altbuf; 874 struct lfs *fs; 875 struct ulfsmount *ump; 876 struct vnode *vp; 877 dev_t dev; 878 int error, i, ronly, fsbsize; 879 kauth_cred_t cred; 880 CLEANERINFO *cip; 881 SEGUSE *sup; 882 daddr_t sb_addr; 883 884 cred = l ? l->l_cred : NOCRED; 885 886 /* The superblock is supposed to be 512 bytes. */ 887 __CTASSERT(sizeof(struct dlfs) == DEV_BSIZE); 888 889 /* 890 * Flush out any old buffers remaining from a previous use. 891 */ 892 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 893 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 894 VOP_UNLOCK(devvp); 895 if (error) 896 return (error); 897 898 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 899 900 /* Don't free random space on error. */ 901 primarybuf = NULL; 902 altbuf = NULL; 903 ump = NULL; 904 905 sb_addr = LFS_LABELPAD / DEV_BSIZE; 906 while (1) { 907 /* 908 * Read in the superblock. 909 * 910 * Note that because LFS_SBPAD is substantially larger 911 * (8K) than the actual on-disk superblock (512 bytes) 912 * the buffer contains enough space to be used as a 913 * whole struct lfs (in-memory superblock) - we do this 914 * only so we can set and use the is64 and dobyteswap 915 * members. XXX this is gross and the logic here should 916 * be reworked. 917 */ 918 error = bread(devvp, sb_addr, LFS_SBPAD, 0, &primarybuf); 919 if (error) 920 goto out; 921 primarysb = (struct lfs *)primarybuf->b_data; 922 923 /* Check the basics. */ 924 error = lfs_checkmagic(primarysb); 925 if (error) { 926 DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock wrong magic\n")); 927 goto out; 928 } 929 if (lfs_sb_getbsize(primarysb) > MAXBSIZE || 930 lfs_sb_getversion(primarysb) > LFS_VERSION || 931 lfs_sb_getbsize(primarysb) < sizeof(struct dlfs)) { 932 DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock sanity failed\n")); 933 /* XXX needs translation */ 934 error = EINVAL; 935 goto out; 936 } 937 if (lfs_sb_getinodefmt(primarysb) > LFS_MAXINODEFMT) { 938 DLOG((DLOG_MOUNT, "lfs_mountfs: unknown inode format %d\n", 939 lfs_sb_getinodefmt(primarysb))); 940 error = EINVAL; 941 goto out; 942 } 943 944 if (lfs_sb_getversion(primarysb) == 1) 945 fsbsize = DEV_BSIZE; 946 else { 947 fsbsize = 1 << lfs_sb_getffshift(primarysb); 948 /* 949 * Could be, if the frag size is large enough, that we 950 * don't have the "real" primary superblock. If that's 951 * the case, get the real one, and try again. 952 */ 953 if (sb_addr != (lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT))) { 954 DLOG((DLOG_MOUNT, "lfs_mountfs: sb daddr" 955 " 0x%llx is not right, trying 0x%llx\n", 956 (long long)sb_addr, 957 (long long)(lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT)))); 958 sb_addr = lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT); 959 brelse(primarybuf, BC_INVAL); 960 continue; 961 } 962 } 963 break; 964 } 965 966 /* 967 * Check the second superblock to see which is newer; then mount 968 * using the older of the two. This is necessary to ensure that 969 * the filesystem is valid if it was not unmounted cleanly. 970 */ 971 972 if (lfs_sb_getsboff(primarysb, 1) && 973 lfs_sb_getsboff(primarysb, 1) - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) 974 { 975 error = bread(devvp, lfs_sb_getsboff(primarysb, 1) * (fsbsize / DEV_BSIZE), 976 LFS_SBPAD, 0, &altbuf); 977 if (error) 978 goto out; 979 altsb = (struct lfs *)altbuf->b_data; 980 981 /* 982 * Note: this used to do the sanity check only if the 983 * timestamp/serial comparison required use of altsb; 984 * this way is less tolerant, but if altsb is corrupted 985 * enough that the magic number, version, and blocksize 986 * are bogus, why would the timestamp or serial fields 987 * mean anything either? If this kind of thing happens, 988 * you need to fsck anyway. 989 */ 990 991 error = lfs_checkmagic(altsb); 992 if (error) 993 goto out; 994 995 /* Check the basics. */ 996 if (lfs_sb_getbsize(altsb) > MAXBSIZE || 997 lfs_sb_getversion(altsb) > LFS_VERSION || 998 lfs_sb_getbsize(altsb) < sizeof(struct dlfs)) { 999 DLOG((DLOG_MOUNT, "lfs_mountfs: alt superblock" 1000 " sanity failed\n")); 1001 error = EINVAL; /* XXX needs translation */ 1002 goto out; 1003 } 1004 1005 if (lfs_sb_getversion(primarysb) == 1) { 1006 /* 1s resolution comparison */ 1007 if (lfs_sb_gettstamp(altsb) < lfs_sb_gettstamp(primarysb)) 1008 thesb = altsb; 1009 else 1010 thesb = primarysb; 1011 } else { 1012 /* monotonic infinite-resolution comparison */ 1013 if (lfs_sb_getserial(altsb) < lfs_sb_getserial(primarysb)) 1014 thesb = altsb; 1015 else 1016 thesb = primarysb; 1017 } 1018 } else { 1019 DLOG((DLOG_MOUNT, "lfs_mountfs: invalid alt superblock location" 1020 " daddr=0x%x\n", lfs_sb_getsboff(primarysb, 1))); 1021 error = EINVAL; 1022 goto out; 1023 } 1024 1025 /* 1026 * Allocate the mount structure, copy the superblock into it. 1027 * Note that the 32-bit and 64-bit superblocks are the same size. 1028 */ 1029 fs = kmem_zalloc(sizeof(struct lfs), KM_SLEEP); 1030 memcpy(&fs->lfs_dlfs_u.u_32, &thesb->lfs_dlfs_u.u_32, 1031 sizeof(struct dlfs)); 1032 fs->lfs_is64 = thesb->lfs_is64; 1033 fs->lfs_dobyteswap = thesb->lfs_dobyteswap; 1034 fs->lfs_hasolddirfmt = false; /* set for real below */ 1035 1036 /* Compatibility */ 1037 if (lfs_sb_getversion(fs) < 2) { 1038 lfs_sb_setsumsize(fs, LFS_V1_SUMMARY_SIZE); 1039 lfs_sb_setibsize(fs, lfs_sb_getbsize(fs)); 1040 lfs_sb_sets0addr(fs, lfs_sb_getsboff(fs, 0)); 1041 lfs_sb_settstamp(fs, lfs_sb_getotstamp(fs)); 1042 lfs_sb_setfsbtodb(fs, 0); 1043 } 1044 if (lfs_sb_getresvseg(fs) == 0) 1045 lfs_sb_setresvseg(fs, MIN(lfs_sb_getminfreeseg(fs) - 1, \ 1046 MAX(MIN_RESV_SEGS, lfs_sb_getminfreeseg(fs) / 2 + 1))); 1047 1048 /* 1049 * If we aren't going to be able to write meaningfully to this 1050 * filesystem, and were not mounted readonly, bomb out now. 1051 */ 1052 if (lfs_fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) { 1053 DLOG((DLOG_MOUNT, "lfs_mount: to mount this filesystem read/write," 1054 " we need BUFPAGES >= %lld\n", 1055 (long long)((bufmem_hiwater / bufmem_lowater) * 1056 LFS_INVERSE_MAX_BYTES( 1057 lfs_fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT))); 1058 kmem_free(fs, sizeof(struct lfs)); 1059 error = EFBIG; /* XXX needs translation */ 1060 goto out; 1061 } 1062 1063 /* Before rolling forward, lock so vget will sleep for other procs */ 1064 if (l != NULL) { 1065 fs->lfs_flags = LFS_NOTYET; 1066 fs->lfs_rfpid = l->l_proc->p_pid; 1067 } 1068 1069 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 1070 ump->um_lfs = fs; 1071 ump->um_fstype = fs->lfs_is64 ? ULFS2 : ULFS1; 1072 /* ump->um_cleaner_thread = NULL; */ 1073 brelse(primarybuf, BC_INVAL); 1074 brelse(altbuf, BC_INVAL); 1075 primarybuf = NULL; 1076 altbuf = NULL; 1077 1078 1079 /* Set up the I/O information */ 1080 fs->lfs_devbsize = DEV_BSIZE; 1081 fs->lfs_iocount = 0; 1082 fs->lfs_diropwait = 0; 1083 fs->lfs_activesb = 0; 1084 lfs_sb_setuinodes(fs, 0); 1085 fs->lfs_ravail = 0; 1086 fs->lfs_favail = 0; 1087 fs->lfs_sbactive = 0; 1088 1089 /* Set up the ifile and lock aflags */ 1090 fs->lfs_doifile = 0; 1091 fs->lfs_writer = 0; 1092 fs->lfs_dirops = 0; 1093 fs->lfs_nadirop = 0; 1094 fs->lfs_seglock = 0; 1095 fs->lfs_pdflush = 0; 1096 fs->lfs_sleepers = 0; 1097 fs->lfs_pages = 0; 1098 rw_init(&fs->lfs_fraglock); 1099 rw_init(&fs->lfs_iflock); 1100 cv_init(&fs->lfs_stopcv, "lfsstop"); 1101 1102 /* Set the file system readonly/modify bits. */ 1103 fs->lfs_ronly = ronly; 1104 if (ronly == 0) 1105 fs->lfs_fmod = 1; 1106 1107 /* Device we're using */ 1108 dev = devvp->v_rdev; 1109 fs->lfs_dev = dev; 1110 fs->lfs_devvp = devvp; 1111 1112 /* ulfs-level information */ 1113 fs->um_flags = 0; 1114 fs->um_bptrtodb = lfs_sb_getffshift(fs) - DEV_BSHIFT; 1115 fs->um_seqinc = lfs_sb_getfrag(fs); 1116 fs->um_nindir = lfs_sb_getnindir(fs); 1117 fs->um_lognindir = ffs(lfs_sb_getnindir(fs)) - 1; 1118 fs->um_maxsymlinklen = lfs_sb_getmaxsymlinklen(fs); 1119 fs->um_dirblksiz = LFS_DIRBLKSIZ; 1120 fs->um_maxfilesize = lfs_sb_getmaxfilesize(fs); 1121 1122 /* quota stuff */ 1123 /* XXX: these need to come from the on-disk superblock to be used */ 1124 fs->lfs_use_quota2 = 0; 1125 fs->lfs_quota_magic = 0; 1126 fs->lfs_quota_flags = 0; 1127 fs->lfs_quotaino[0] = 0; 1128 fs->lfs_quotaino[1] = 0; 1129 1130 /* Initialize the mount structure. */ 1131 mp->mnt_data = ump; 1132 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1133 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); 1134 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1135 mp->mnt_stat.f_namemax = LFS_MAXNAMLEN; 1136 mp->mnt_stat.f_iosize = lfs_sb_getbsize(fs); 1137 mp->mnt_flag |= MNT_LOCAL; 1138 mp->mnt_fs_bshift = lfs_sb_getbshift(fs); 1139 if (fs->um_maxsymlinklen > 0) 1140 mp->mnt_iflag |= IMNT_DTYPE; 1141 else 1142 fs->lfs_hasolddirfmt = true; 1143 1144 ump->um_mountp = mp; 1145 for (i = 0; i < ULFS_MAXQUOTAS; i++) 1146 ump->um_quotas[i] = NULLVP; 1147 spec_node_setmountedfs(devvp, mp); 1148 1149 /* Set up reserved memory for pageout */ 1150 lfs_setup_resblks(fs); 1151 /* Set up vdirop tailq */ 1152 TAILQ_INIT(&fs->lfs_dchainhd); 1153 /* and paging tailq */ 1154 TAILQ_INIT(&fs->lfs_pchainhd); 1155 /* and delayed segment accounting for truncation list */ 1156 LIST_INIT(&fs->lfs_segdhd); 1157 1158 /* 1159 * We use the ifile vnode for almost every operation. Instead of 1160 * retrieving it from the hash table each time we retrieve it here, 1161 * artificially increment the reference count and keep a pointer 1162 * to it in the incore copy of the superblock. 1163 */ 1164 if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { 1165 DLOG((DLOG_MOUNT, "lfs_mountfs: ifile vget failed, error=%d\n", error)); 1166 goto out; 1167 } 1168 fs->lfs_ivnode = vp; 1169 vref(vp); 1170 1171 /* Set up inode bitmap and order free list */ 1172 lfs_order_freelist(fs); 1173 1174 /* Set up segment usage flags for the autocleaner. */ 1175 fs->lfs_nactive = 0; 1176 fs->lfs_suflags = malloc(2 * sizeof(u_int32_t *), 1177 M_SEGMENT, M_WAITOK); 1178 fs->lfs_suflags[0] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), 1179 M_SEGMENT, M_WAITOK); 1180 fs->lfs_suflags[1] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), 1181 M_SEGMENT, M_WAITOK); 1182 memset(fs->lfs_suflags[1], 0, lfs_sb_getnseg(fs) * sizeof(u_int32_t)); 1183 for (i = 0; i < lfs_sb_getnseg(fs); i++) { 1184 int changed; 1185 struct buf *bp; 1186 1187 LFS_SEGENTRY(sup, fs, i, bp); 1188 changed = 0; 1189 if (!ronly) { 1190 if (sup->su_nbytes == 0 && 1191 !(sup->su_flags & SEGUSE_EMPTY)) { 1192 sup->su_flags |= SEGUSE_EMPTY; 1193 ++changed; 1194 } else if (!(sup->su_nbytes == 0) && 1195 (sup->su_flags & SEGUSE_EMPTY)) { 1196 sup->su_flags &= ~SEGUSE_EMPTY; 1197 ++changed; 1198 } 1199 if (sup->su_flags & (SEGUSE_ACTIVE|SEGUSE_INVAL)) { 1200 sup->su_flags &= ~(SEGUSE_ACTIVE|SEGUSE_INVAL); 1201 ++changed; 1202 } 1203 } 1204 fs->lfs_suflags[0][i] = sup->su_flags; 1205 if (changed) 1206 LFS_WRITESEGENTRY(sup, fs, i, bp); 1207 else 1208 brelse(bp, 0); 1209 } 1210 1211 /* 1212 * XXX: if the fs has quotas, quotas should be on even if 1213 * readonly. Otherwise you can't query the quota info! 1214 * However, that's not how the quota2 code got written and I 1215 * don't know if it'll behave itself if enabled while 1216 * readonly, so for now use the same enable logic as ffs. 1217 * 1218 * XXX: also, if you use the -f behavior allowed here (and 1219 * equivalently above for remount) it will corrupt the fs. It 1220 * ought not to allow that. It should allow mounting readonly 1221 * if there are quotas and the kernel doesn't have the quota 1222 * code, but only readonly. 1223 * 1224 * XXX: and if you use the -f behavior allowed here it will 1225 * likely crash at unmount time (or remount time) because we 1226 * think quotas are active. 1227 * 1228 * Although none of this applies until there's a way to set 1229 * lfs_use_quota2 and have quotas in the fs at all. 1230 */ 1231 if (!ronly && fs->lfs_use_quota2) { 1232 #ifdef LFS_QUOTA2 1233 error = lfs_quota2_mount(mp); 1234 #else 1235 uprintf("%s: no kernel support for this filesystem's quotas\n", 1236 mp->mnt_stat.f_mntonname); 1237 if (mp->mnt_flag & MNT_FORCE) { 1238 uprintf("%s: mounting anyway; fsck afterwards\n", 1239 mp->mnt_stat.f_mntonname); 1240 } else { 1241 error = EINVAL; 1242 } 1243 #endif 1244 if (error) { 1245 /* XXX XXX must clean up the stuff immediately above */ 1246 printf("lfs_mountfs: sorry, leaking some memory\n"); 1247 goto out; 1248 } 1249 } 1250 1251 #ifdef LFS_EXTATTR 1252 /* 1253 * Initialize file-backed extended attributes for ULFS1 file 1254 * systems. 1255 * 1256 * XXX: why is this limited to ULFS1? 1257 */ 1258 if (ump->um_fstype == ULFS1) { 1259 ulfs_extattr_uepm_init(&ump->um_extattr); 1260 } 1261 #endif 1262 1263 #ifdef LFS_KERNEL_RFW 1264 lfs_roll_forward(fs, mp, l); 1265 #endif 1266 1267 /* If writing, sb is not clean; record in case of immediate crash */ 1268 if (!fs->lfs_ronly) { 1269 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); 1270 lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); 1271 lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); 1272 } 1273 1274 /* Allow vget now that roll-forward is complete */ 1275 fs->lfs_flags &= ~(LFS_NOTYET); 1276 wakeup(&fs->lfs_flags); 1277 1278 /* 1279 * Initialize the ifile cleaner info with information from 1280 * the superblock. 1281 */ 1282 { 1283 struct buf *bp; 1284 1285 LFS_CLEANERINFO(cip, fs, bp); 1286 lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); 1287 lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); 1288 lfs_ci_setavail(fs, cip, lfs_sb_getavail(fs)); 1289 lfs_ci_setbfree(fs, cip, lfs_sb_getbfree(fs)); 1290 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 1291 } 1292 1293 /* 1294 * Mark the current segment as ACTIVE, since we're going to 1295 * be writing to it. 1296 */ 1297 { 1298 struct buf *bp; 1299 1300 LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); 1301 sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; 1302 fs->lfs_nactive++; 1303 LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); /* Ifile */ 1304 } 1305 1306 /* Now that roll-forward is done, unlock the Ifile */ 1307 vput(vp); 1308 1309 /* Start the pagedaemon-anticipating daemon */ 1310 mutex_enter(&lfs_lock); 1311 if (lfs_writer_daemon == 0 && lfs_writer_lid == 0 && 1312 kthread_create(PRI_BIO, 0, NULL, 1313 lfs_writerd, NULL, NULL, "lfs_writer") != 0) 1314 panic("fork lfs_writer"); 1315 mutex_exit(&lfs_lock); 1316 1317 printf("WARNING: the log-structured file system is experimental\n" 1318 "WARNING: it may cause system crashes and/or corrupt data\n"); 1319 1320 return (0); 1321 1322 out: 1323 if (primarybuf) 1324 brelse(primarybuf, BC_INVAL); 1325 if (altbuf) 1326 brelse(altbuf, BC_INVAL); 1327 if (ump) { 1328 kmem_free(ump->um_lfs, sizeof(struct lfs)); 1329 kmem_free(ump, sizeof(*ump)); 1330 mp->mnt_data = NULL; 1331 } 1332 1333 return (error); 1334 } 1335 1336 /* 1337 * unmount system call 1338 */ 1339 int 1340 lfs_unmount(struct mount *mp, int mntflags) 1341 { 1342 struct lwp *l = curlwp; 1343 struct ulfsmount *ump; 1344 struct lfs *fs; 1345 int error, flags, ronly; 1346 vnode_t *vp; 1347 1348 flags = 0; 1349 if (mntflags & MNT_FORCE) 1350 flags |= FORCECLOSE; 1351 1352 ump = VFSTOULFS(mp); 1353 fs = ump->um_lfs; 1354 1355 /* Two checkpoints */ 1356 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1357 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1358 1359 /* wake up the cleaner so it can die */ 1360 /* XXX: shouldn't this be *after* the error cases below? */ 1361 lfs_wakeup_cleaner(fs); 1362 mutex_enter(&lfs_lock); 1363 while (fs->lfs_sleepers) 1364 mtsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers", 0, 1365 &lfs_lock); 1366 mutex_exit(&lfs_lock); 1367 1368 #ifdef LFS_EXTATTR 1369 if (ump->um_fstype == ULFS1) { 1370 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_STARTED) { 1371 ulfs_extattr_stop(mp, curlwp); 1372 } 1373 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_INITIALIZED) { 1374 ulfs_extattr_uepm_destroy(&ump->um_extattr); 1375 } 1376 } 1377 #endif 1378 #ifdef LFS_QUOTA 1379 if ((error = lfsquota1_umount(mp, flags)) != 0) 1380 return (error); 1381 #endif 1382 #ifdef LFS_QUOTA2 1383 if ((error = lfsquota2_umount(mp, flags)) != 0) 1384 return (error); 1385 #endif 1386 if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) 1387 return (error); 1388 if ((error = VFS_SYNC(mp, 1, l->l_cred)) != 0) 1389 return (error); 1390 vp = fs->lfs_ivnode; 1391 mutex_enter(vp->v_interlock); 1392 if (LIST_FIRST(&vp->v_dirtyblkhd)) 1393 panic("lfs_unmount: still dirty blocks on ifile vnode"); 1394 mutex_exit(vp->v_interlock); 1395 1396 /* Explicitly write the superblock, to update serial and pflags */ 1397 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) | LFS_PF_CLEAN); 1398 lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); 1399 lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); 1400 mutex_enter(&lfs_lock); 1401 while (fs->lfs_iocount) 1402 mtsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount", 0, 1403 &lfs_lock); 1404 mutex_exit(&lfs_lock); 1405 1406 /* Finish with the Ifile, now that we're done with it */ 1407 vgone(fs->lfs_ivnode); 1408 1409 ronly = !fs->lfs_ronly; 1410 if (fs->lfs_devvp->v_type != VBAD) 1411 spec_node_setmountedfs(fs->lfs_devvp, NULL); 1412 vn_lock(fs->lfs_devvp, LK_EXCLUSIVE | LK_RETRY); 1413 error = VOP_CLOSE(fs->lfs_devvp, 1414 ronly ? FREAD : FREAD|FWRITE, NOCRED); 1415 vput(fs->lfs_devvp); 1416 1417 /* Complain about page leakage */ 1418 if (fs->lfs_pages > 0) 1419 printf("lfs_unmount: still claim %d pages (%d in subsystem)\n", 1420 fs->lfs_pages, lfs_subsys_pages); 1421 1422 /* Free per-mount data structures */ 1423 free(fs->lfs_ino_bitmap, M_SEGMENT); 1424 free(fs->lfs_suflags[0], M_SEGMENT); 1425 free(fs->lfs_suflags[1], M_SEGMENT); 1426 free(fs->lfs_suflags, M_SEGMENT); 1427 lfs_free_resblks(fs); 1428 cv_destroy(&fs->lfs_stopcv); 1429 rw_destroy(&fs->lfs_fraglock); 1430 rw_destroy(&fs->lfs_iflock); 1431 1432 kmem_free(fs, sizeof(struct lfs)); 1433 kmem_free(ump, sizeof(*ump)); 1434 1435 mp->mnt_data = NULL; 1436 mp->mnt_flag &= ~MNT_LOCAL; 1437 return (error); 1438 } 1439 1440 /* 1441 * Get file system statistics. 1442 * 1443 * NB: We don't lock to access the superblock here, because it's not 1444 * really that important if we get it wrong. 1445 */ 1446 int 1447 lfs_statvfs(struct mount *mp, struct statvfs *sbp) 1448 { 1449 struct lfs *fs; 1450 struct ulfsmount *ump; 1451 1452 ump = VFSTOULFS(mp); 1453 fs = ump->um_lfs; 1454 1455 sbp->f_bsize = lfs_sb_getbsize(fs); 1456 sbp->f_frsize = lfs_sb_getfsize(fs); 1457 sbp->f_iosize = lfs_sb_getbsize(fs); 1458 sbp->f_blocks = LFS_EST_NONMETA(fs) - VTOI(fs->lfs_ivnode)->i_lfs_effnblks; 1459 1460 sbp->f_bfree = LFS_EST_BFREE(fs); 1461 /* 1462 * XXX this should be lfs_sb_getsize (measured in frags) 1463 * rather than dsize (measured in diskblocks). However, 1464 * getsize needs a format version check (for version 1 it 1465 * needs to be blockstofrags'd) so for the moment I'm going to 1466 * leave this... it won't fire wrongly as frags are at least 1467 * as big as diskblocks. 1468 */ 1469 KASSERT(sbp->f_bfree <= lfs_sb_getdsize(fs)); 1470 #if 0 1471 if (sbp->f_bfree < 0) 1472 sbp->f_bfree = 0; 1473 #endif 1474 1475 sbp->f_bresvd = LFS_EST_RSVD(fs); 1476 if (sbp->f_bfree > sbp->f_bresvd) 1477 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1478 else 1479 sbp->f_bavail = 0; 1480 1481 /* XXX: huh? - dholland 20150728 */ 1482 sbp->f_files = lfs_sb_getbfree(fs) / lfs_btofsb(fs, lfs_sb_getibsize(fs)) 1483 * LFS_INOPB(fs); 1484 sbp->f_ffree = sbp->f_files - lfs_sb_getnfiles(fs); 1485 sbp->f_favail = sbp->f_ffree; 1486 sbp->f_fresvd = 0; 1487 copy_statvfs_info(sbp, mp); 1488 return (0); 1489 } 1490 1491 /* 1492 * Go through the disk queues to initiate sandbagged IO; 1493 * go through the inodes to write those that have been modified; 1494 * initiate the writing of the super block if it has been modified. 1495 * 1496 * Note: we are always called with the filesystem marked `MPBUSY'. 1497 */ 1498 int 1499 lfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1500 { 1501 int error; 1502 struct lfs *fs; 1503 1504 fs = VFSTOULFS(mp)->um_lfs; 1505 if (fs->lfs_ronly) 1506 return 0; 1507 1508 /* Snapshots should not hose the syncer */ 1509 /* 1510 * XXX Sync can block here anyway, since we don't have a very 1511 * XXX good idea of how much data is pending. If it's more 1512 * XXX than a segment and lfs_nextseg is close to the end of 1513 * XXX the log, we'll likely block. 1514 */ 1515 mutex_enter(&lfs_lock); 1516 if (fs->lfs_nowrap && lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs)) { 1517 mutex_exit(&lfs_lock); 1518 return 0; 1519 } 1520 mutex_exit(&lfs_lock); 1521 1522 lfs_writer_enter(fs, "lfs_dirops"); 1523 1524 /* All syncs must be checkpoints until roll-forward is implemented. */ 1525 DLOG((DLOG_FLUSH, "lfs_sync at 0x%jx\n", 1526 (uintmax_t)lfs_sb_getoffset(fs))); 1527 error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); 1528 lfs_writer_leave(fs); 1529 #ifdef LFS_QUOTA 1530 lfs_qsync(mp); 1531 #endif 1532 return (error); 1533 } 1534 1535 /* 1536 * Look up an LFS dinode number to find its incore vnode. If not already 1537 * in core, read it in from the specified device. Return the inode locked. 1538 * Detection and handling of mount points must be done by the calling routine. 1539 */ 1540 int 1541 lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1542 { 1543 int error; 1544 1545 error = vcache_get(mp, &ino, sizeof(ino), vpp); 1546 if (error) 1547 return error; 1548 error = vn_lock(*vpp, LK_EXCLUSIVE); 1549 if (error) { 1550 vrele(*vpp); 1551 *vpp = NULL; 1552 return error; 1553 } 1554 1555 return 0; 1556 } 1557 1558 /* 1559 * Create a new vnode/inode pair and initialize what fields we can. 1560 */ 1561 static void 1562 lfs_init_vnode(struct ulfsmount *ump, ino_t ino, struct vnode *vp) 1563 { 1564 struct lfs *fs = ump->um_lfs; 1565 struct inode *ip; 1566 union lfs_dinode *dp; 1567 1568 ASSERT_NO_SEGLOCK(fs); 1569 1570 /* Initialize the inode. */ 1571 ip = pool_get(&lfs_inode_pool, PR_WAITOK); 1572 memset(ip, 0, sizeof(*ip)); 1573 dp = pool_get(&lfs_dinode_pool, PR_WAITOK); 1574 memset(dp, 0, sizeof(*dp)); 1575 ip->inode_ext.lfs = pool_get(&lfs_inoext_pool, PR_WAITOK); 1576 memset(ip->inode_ext.lfs, 0, sizeof(*ip->inode_ext.lfs)); 1577 ip->i_din = dp; 1578 ip->i_ump = ump; 1579 ip->i_vnode = vp; 1580 ip->i_dev = fs->lfs_dev; 1581 lfs_dino_setinumber(fs, dp, ino); 1582 ip->i_number = ino; 1583 ip->i_lfs = fs; 1584 ip->i_lfs_effnblks = 0; 1585 SPLAY_INIT(&ip->i_lfs_lbtree); 1586 ip->i_lfs_nbtree = 0; 1587 LIST_INIT(&ip->i_lfs_segdhd); 1588 1589 vp->v_tag = VT_LFS; 1590 vp->v_op = lfs_vnodeop_p; 1591 vp->v_data = ip; 1592 } 1593 1594 /* 1595 * Undo lfs_init_vnode(). 1596 */ 1597 static void 1598 lfs_deinit_vnode(struct ulfsmount *ump, struct vnode *vp) 1599 { 1600 struct inode *ip = VTOI(vp); 1601 1602 pool_put(&lfs_inoext_pool, ip->inode_ext.lfs); 1603 pool_put(&lfs_dinode_pool, ip->i_din); 1604 pool_put(&lfs_inode_pool, ip); 1605 vp->v_data = NULL; 1606 } 1607 1608 /* 1609 * Read an inode from disk and initialize this vnode / inode pair. 1610 * Caller assures no other thread will try to load this inode. 1611 */ 1612 int 1613 lfs_loadvnode(struct mount *mp, struct vnode *vp, 1614 const void *key, size_t key_len, const void **new_key) 1615 { 1616 struct lfs *fs; 1617 union lfs_dinode *dip; 1618 struct inode *ip; 1619 struct buf *bp; 1620 IFILE *ifp; 1621 struct ulfsmount *ump; 1622 ino_t ino; 1623 daddr_t daddr; 1624 int error, retries; 1625 struct timespec ts; 1626 1627 KASSERT(key_len == sizeof(ino)); 1628 memcpy(&ino, key, key_len); 1629 1630 memset(&ts, 0, sizeof ts); /* XXX gcc */ 1631 1632 ump = VFSTOULFS(mp); 1633 fs = ump->um_lfs; 1634 1635 /* 1636 * If the filesystem is not completely mounted yet, suspend 1637 * any access requests (wait for roll-forward to complete). 1638 */ 1639 mutex_enter(&lfs_lock); 1640 while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) 1641 mtsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet", 0, 1642 &lfs_lock); 1643 mutex_exit(&lfs_lock); 1644 1645 /* Translate the inode number to a disk address. */ 1646 if (ino == LFS_IFILE_INUM) 1647 daddr = lfs_sb_getidaddr(fs); 1648 else { 1649 /* XXX bounds-check this too */ 1650 LFS_IENTRY(ifp, fs, ino, bp); 1651 daddr = lfs_if_getdaddr(fs, ifp); 1652 if (lfs_sb_getversion(fs) > 1) { 1653 ts.tv_sec = lfs_if_getatime_sec(fs, ifp); 1654 ts.tv_nsec = lfs_if_getatime_nsec(fs, ifp); 1655 } 1656 1657 brelse(bp, 0); 1658 if (daddr == LFS_UNUSED_DADDR) 1659 return (ENOENT); 1660 } 1661 1662 /* Allocate/init new vnode/inode. */ 1663 lfs_init_vnode(ump, ino, vp); 1664 ip = VTOI(vp); 1665 1666 /* If the cleaner supplied the inode, use it. */ 1667 if (curlwp == fs->lfs_cleaner_thread && fs->lfs_cleaner_hint != NULL && 1668 fs->lfs_cleaner_hint->bi_lbn == LFS_UNUSED_LBN) { 1669 dip = fs->lfs_cleaner_hint->bi_bp; 1670 if (fs->lfs_is64) { 1671 error = copyin(dip, &ip->i_din->u_64, 1672 sizeof(struct lfs64_dinode)); 1673 } else { 1674 error = copyin(dip, &ip->i_din->u_32, 1675 sizeof(struct lfs32_dinode)); 1676 } 1677 if (error) { 1678 lfs_deinit_vnode(ump, vp); 1679 return error; 1680 } 1681 KASSERT(ip->i_number == ino); 1682 goto out; 1683 } 1684 1685 /* Read in the disk contents for the inode, copy into the inode. */ 1686 retries = 0; 1687 again: 1688 error = bread(fs->lfs_devvp, LFS_FSBTODB(fs, daddr), 1689 (lfs_sb_getversion(fs) == 1 ? lfs_sb_getbsize(fs) : lfs_sb_getibsize(fs)), 1690 0, &bp); 1691 if (error) { 1692 lfs_deinit_vnode(ump, vp); 1693 return error; 1694 } 1695 1696 dip = lfs_ifind(fs, ino, bp); 1697 if (dip == NULL) { 1698 /* Assume write has not completed yet; try again */ 1699 brelse(bp, BC_INVAL); 1700 ++retries; 1701 if (retries <= LFS_IFIND_RETRIES) { 1702 mutex_enter(&lfs_lock); 1703 if (fs->lfs_iocount) { 1704 DLOG((DLOG_VNODE, 1705 "%s: dinode %d not found, retrying...\n", 1706 __func__, ino)); 1707 (void)mtsleep(&fs->lfs_iocount, PRIBIO + 1, 1708 "lfs ifind", 1, &lfs_lock); 1709 } else 1710 retries = LFS_IFIND_RETRIES; 1711 mutex_exit(&lfs_lock); 1712 goto again; 1713 } 1714 #ifdef DEBUG 1715 /* If the seglock is held look at the bpp to see 1716 what is there anyway */ 1717 mutex_enter(&lfs_lock); 1718 if (fs->lfs_seglock > 0) { 1719 struct buf **bpp; 1720 union lfs_dinode *dp; 1721 int i; 1722 1723 for (bpp = fs->lfs_sp->bpp; 1724 bpp != fs->lfs_sp->cbpp; ++bpp) { 1725 if ((*bpp)->b_vp == fs->lfs_ivnode && 1726 bpp != fs->lfs_sp->bpp) { 1727 /* Inode block */ 1728 printf("%s: block 0x%" PRIx64 ": ", 1729 __func__, (*bpp)->b_blkno); 1730 for (i = 0; i < LFS_INOPB(fs); i++) { 1731 dp = DINO_IN_BLOCK(fs, 1732 (*bpp)->b_data, i); 1733 if (lfs_dino_getinumber(fs, dp)) 1734 printf("%ju ", 1735 (uintmax_t)lfs_dino_getinumber(fs, dp)); 1736 } 1737 printf("\n"); 1738 } 1739 } 1740 } 1741 mutex_exit(&lfs_lock); 1742 #endif /* DEBUG */ 1743 panic("lfs_loadvnode: dinode not found"); 1744 } 1745 lfs_copy_dinode(fs, ip->i_din, dip); 1746 brelse(bp, 0); 1747 1748 out: 1749 if (lfs_sb_getversion(fs) > 1) { 1750 lfs_dino_setatime(fs, ip->i_din, ts.tv_sec); 1751 lfs_dino_setatimensec(fs, ip->i_din, ts.tv_nsec); 1752 } 1753 1754 lfs_vinit(mp, &vp); 1755 1756 *new_key = &ip->i_number; 1757 return 0; 1758 } 1759 1760 /* 1761 * Create a new inode and initialize this vnode / inode pair. 1762 */ 1763 int 1764 lfs_newvnode(struct mount *mp, struct vnode *dvp, struct vnode *vp, 1765 struct vattr *vap, kauth_cred_t cred, 1766 size_t *key_len, const void **new_key) 1767 { 1768 ino_t ino; 1769 struct inode *ip; 1770 struct ulfsmount *ump; 1771 struct lfs *fs; 1772 int error, mode, gen; 1773 1774 KASSERT(dvp != NULL || vap->va_fileid > 0); 1775 KASSERT(dvp != NULL && dvp->v_mount == mp); 1776 KASSERT(vap->va_type != VNON); 1777 1778 *key_len = sizeof(ino); 1779 ump = VFSTOULFS(mp); 1780 fs = ump->um_lfs; 1781 mode = MAKEIMODE(vap->va_type, vap->va_mode); 1782 1783 /* 1784 * Allocate fresh inode. With "dvp == NULL" take the inode number 1785 * and version from "vap". 1786 */ 1787 if (dvp == NULL) { 1788 ino = vap->va_fileid; 1789 gen = vap->va_gen; 1790 error = lfs_valloc_fixed(fs, ino, gen); 1791 } else { 1792 error = lfs_valloc(dvp, mode, cred, &ino, &gen); 1793 } 1794 if (error) 1795 return error; 1796 1797 /* Attach inode to vnode. */ 1798 lfs_init_vnode(ump, ino, vp); 1799 ip = VTOI(vp); 1800 1801 mutex_enter(&lfs_lock); 1802 LFS_SET_UINO(ip, IN_CHANGE); 1803 mutex_exit(&lfs_lock); 1804 1805 /* Note no blocks yet */ 1806 ip->i_lfs_hiblk = -1; 1807 1808 /* Set a new generation number for this inode. */ 1809 ip->i_gen = gen; 1810 lfs_dino_setgen(fs, ip->i_din, gen); 1811 1812 memset(ip->i_lfs_fragsize, 0, 1813 ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); 1814 1815 /* Set uid / gid. */ 1816 if (cred == NOCRED || cred == FSCRED) { 1817 ip->i_gid = 0; 1818 ip->i_uid = 0; 1819 } else { 1820 ip->i_gid = VTOI(dvp)->i_gid; 1821 ip->i_uid = kauth_cred_geteuid(cred); 1822 } 1823 DIP_ASSIGN(ip, gid, ip->i_gid); 1824 DIP_ASSIGN(ip, uid, ip->i_uid); 1825 1826 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 1827 error = lfs_chkiq(ip, 1, cred, 0); 1828 if (error) { 1829 lfs_vfree(dvp, ino, mode); 1830 lfs_deinit_vnode(ump, vp); 1831 1832 return error; 1833 } 1834 #endif 1835 1836 /* Set type and finalize. */ 1837 ip->i_flags = 0; 1838 DIP_ASSIGN(ip, flags, 0); 1839 ip->i_mode = mode; 1840 DIP_ASSIGN(ip, mode, mode); 1841 if (vap->va_rdev != VNOVAL) { 1842 /* 1843 * Want to be able to use this to make badblock 1844 * inodes, so don't truncate the dev number. 1845 */ 1846 // XXX clean this up 1847 if (ump->um_fstype == ULFS1) 1848 ip->i_din->u_32.di_rdev = ulfs_rw32(vap->va_rdev, 1849 ULFS_MPNEEDSWAP(fs)); 1850 else 1851 ip->i_din->u_64.di_rdev = ulfs_rw64(vap->va_rdev, 1852 ULFS_MPNEEDSWAP(fs)); 1853 } 1854 lfs_vinit(mp, &vp); 1855 1856 *new_key = &ip->i_number; 1857 return 0; 1858 } 1859 1860 /* 1861 * File handle to vnode 1862 */ 1863 int 1864 lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1865 { 1866 struct lfid lfh; 1867 struct lfs *fs; 1868 1869 if (fhp->fid_len != sizeof(struct lfid)) 1870 return EINVAL; 1871 1872 memcpy(&lfh, fhp, sizeof(lfh)); 1873 if (lfh.lfid_ino < LFS_IFILE_INUM) 1874 return ESTALE; 1875 1876 fs = VFSTOULFS(mp)->um_lfs; 1877 if (lfh.lfid_ident != lfs_sb_getident(fs)) 1878 return ESTALE; 1879 1880 if (lfh.lfid_ino > 1881 ((lfs_dino_getsize(fs, VTOI(fs->lfs_ivnode)->i_din) >> lfs_sb_getbshift(fs)) - 1882 lfs_sb_getcleansz(fs) - lfs_sb_getsegtabsz(fs)) * lfs_sb_getifpb(fs)) 1883 return ESTALE; 1884 1885 return (ulfs_fhtovp(mp, &lfh.lfid_ufid, vpp)); 1886 } 1887 1888 /* 1889 * Vnode pointer to File handle 1890 */ 1891 /* ARGSUSED */ 1892 int 1893 lfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1894 { 1895 struct inode *ip; 1896 struct lfid lfh; 1897 1898 if (*fh_size < sizeof(struct lfid)) { 1899 *fh_size = sizeof(struct lfid); 1900 return E2BIG; 1901 } 1902 *fh_size = sizeof(struct lfid); 1903 ip = VTOI(vp); 1904 memset(&lfh, 0, sizeof(lfh)); 1905 lfh.lfid_len = sizeof(struct lfid); 1906 lfh.lfid_ino = ip->i_number; 1907 lfh.lfid_gen = ip->i_gen; 1908 lfh.lfid_ident = lfs_sb_getident(ip->i_lfs); 1909 memcpy(fhp, &lfh, sizeof(lfh)); 1910 return (0); 1911 } 1912 1913 /* 1914 * ulfs_bmaparray callback function for writing. 1915 * 1916 * Since blocks will be written to the new segment anyway, 1917 * we don't care about current daddr of them. 1918 */ 1919 static bool 1920 lfs_issequential_hole(const struct lfs *fs, 1921 daddr_t daddr0, daddr_t daddr1) 1922 { 1923 (void)fs; /* not used */ 1924 1925 KASSERT(daddr0 == UNWRITTEN || 1926 (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR(fs))); 1927 KASSERT(daddr1 == UNWRITTEN || 1928 (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR(fs))); 1929 1930 /* NOTE: all we want to know here is 'hole or not'. */ 1931 /* NOTE: UNASSIGNED is converted to 0 by ulfs_bmaparray. */ 1932 1933 /* 1934 * treat UNWRITTENs and all resident blocks as 'contiguous' 1935 */ 1936 if (daddr0 != 0 && daddr1 != 0) 1937 return true; 1938 1939 /* 1940 * both are in hole? 1941 */ 1942 if (daddr0 == 0 && daddr1 == 0) 1943 return true; /* all holes are 'contiguous' for us. */ 1944 1945 return false; 1946 } 1947 1948 /* 1949 * lfs_gop_write functions exactly like genfs_gop_write, except that 1950 * (1) it requires the seglock to be held by its caller, and sp->fip 1951 * to be properly initialized (it will return without re-initializing 1952 * sp->fip, and without calling lfs_writeseg). 1953 * (2) it uses the remaining space in the segment, rather than VOP_BMAP, 1954 * to determine how large a block it can write at once (though it does 1955 * still use VOP_BMAP to find holes in the file); 1956 * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks 1957 * (leaving lfs_writeseg to deal with the cluster blocks, so we might 1958 * now have clusters of clusters, ick.) 1959 */ 1960 static int 1961 lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, 1962 int flags) 1963 { 1964 int i, error, run, haveeof = 0; 1965 int fs_bshift; 1966 vaddr_t kva; 1967 off_t eof, offset, startoffset = 0; 1968 size_t bytes, iobytes, skipbytes; 1969 bool async = (flags & PGO_SYNCIO) == 0; 1970 daddr_t lbn, blkno; 1971 struct vm_page *pg; 1972 struct buf *mbp, *bp; 1973 struct vnode *devvp = VTOI(vp)->i_devvp; 1974 struct inode *ip = VTOI(vp); 1975 struct lfs *fs = ip->i_lfs; 1976 struct segment *sp = fs->lfs_sp; 1977 SEGSUM *ssp; 1978 UVMHIST_FUNC("lfs_gop_write"); UVMHIST_CALLED(ubchist); 1979 const char * failreason = NULL; 1980 1981 ASSERT_SEGLOCK(fs); 1982 1983 /* The Ifile lives in the buffer cache */ 1984 KASSERT(vp != fs->lfs_ivnode); 1985 1986 /* 1987 * We don't want to fill the disk before the cleaner has a chance 1988 * to make room for us. If we're in danger of doing that, fail 1989 * with EAGAIN. The caller will have to notice this, unlock 1990 * so the cleaner can run, relock and try again. 1991 * 1992 * We must write everything, however, if our vnode is being 1993 * reclaimed. 1994 */ 1995 mutex_enter(vp->v_interlock); 1996 if (LFS_STARVED_FOR_SEGS(fs) && vdead_check(vp, VDEAD_NOWAIT) == 0) { 1997 mutex_exit(vp->v_interlock); 1998 failreason = "Starved for segs and not flushing vp"; 1999 goto tryagain; 2000 } 2001 mutex_exit(vp->v_interlock); 2002 2003 /* 2004 * Sometimes things slip past the filters in lfs_putpages, 2005 * and the pagedaemon tries to write pages---problem is 2006 * that the pagedaemon never acquires the segment lock. 2007 * 2008 * Alternatively, pages that were clean when we called 2009 * genfs_putpages may have become dirty in the meantime. In this 2010 * case the segment header is not properly set up for blocks 2011 * to be added to it. 2012 * 2013 * Unbusy and unclean the pages, and put them on the ACTIVE 2014 * queue under the hypothesis that they couldn't have got here 2015 * unless they were modified *quite* recently. 2016 * 2017 * XXXUBC that last statement is an oversimplification of course. 2018 */ 2019 if (!LFS_SEGLOCK_HELD(fs)) { 2020 failreason = "Seglock not held"; 2021 goto tryagain; 2022 } 2023 if (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) { 2024 failreason = "Inode with no_gop_write"; 2025 goto tryagain; 2026 } 2027 if ((pgs[0]->offset & lfs_sb_getbmask(fs)) != 0) { 2028 failreason = "Bad page offset"; 2029 goto tryagain; 2030 } 2031 2032 UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x", 2033 vp, pgs, npages, flags); 2034 2035 GOP_SIZE(vp, vp->v_size, &eof, 0); 2036 haveeof = 1; 2037 2038 if (vp->v_type == VREG) 2039 fs_bshift = vp->v_mount->mnt_fs_bshift; 2040 else 2041 fs_bshift = DEV_BSHIFT; 2042 error = 0; 2043 pg = pgs[0]; 2044 startoffset = pg->offset; 2045 KASSERT(eof >= 0); 2046 2047 if (startoffset >= eof) { 2048 failreason = "Offset beyond EOF"; 2049 goto tryagain; 2050 } else 2051 bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); 2052 skipbytes = 0; 2053 2054 KASSERT(bytes != 0); 2055 2056 /* Swap PG_DELWRI for PG_PAGEOUT */ 2057 for (i = 0; i < npages; i++) { 2058 if (pgs[i]->flags & PG_DELWRI) { 2059 KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); 2060 pgs[i]->flags &= ~PG_DELWRI; 2061 pgs[i]->flags |= PG_PAGEOUT; 2062 uvm_pageout_start(1); 2063 mutex_enter(vp->v_interlock); 2064 mutex_enter(&uvm_pageqlock); 2065 uvm_pageunwire(pgs[i]); 2066 mutex_exit(&uvm_pageqlock); 2067 mutex_exit(vp->v_interlock); 2068 } 2069 } 2070 2071 /* 2072 * Check to make sure we're starting on a block boundary. 2073 * We'll check later to make sure we always write entire 2074 * blocks (or fragments). 2075 */ 2076 if (startoffset & lfs_sb_getbmask(fs)) 2077 printf("%" PRId64 " & %" PRIu64 " = %" PRId64 "\n", 2078 startoffset, lfs_sb_getbmask(fs), 2079 startoffset & lfs_sb_getbmask(fs)); 2080 KASSERT((startoffset & lfs_sb_getbmask(fs)) == 0); 2081 if (bytes & lfs_sb_getffmask(fs)) { 2082 printf("lfs_gop_write: asked to write %ld bytes\n", (long)bytes); 2083 panic("lfs_gop_write: non-integer blocks"); 2084 } 2085 2086 /* 2087 * We could deadlock here on pager_map with UVMPAGER_MAPIN_WAITOK. 2088 * If we would, write what we have and try again. If we don't 2089 * have anything to write, we'll have to sleep. 2090 */ 2091 ssp = (SEGSUM *)sp->segsum; 2092 if ((kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 2093 (lfs_ss_getnfinfo(fs, ssp) < 1 ? 2094 UVMPAGER_MAPIN_WAITOK : 0))) == 0x0) { 2095 DLOG((DLOG_PAGE, "lfs_gop_write: forcing write\n")); 2096 #if 0 2097 " with nfinfo=%d at offset 0x%jx\n", 2098 (int)lfs_ss_getnfinfo(fs, ssp), 2099 (uintmax_t)lfs_sb_getoffset(fs))); 2100 #endif 2101 lfs_updatemeta(sp); 2102 lfs_release_finfo(fs); 2103 (void) lfs_writeseg(fs, sp); 2104 2105 lfs_acquire_finfo(fs, ip->i_number, ip->i_gen); 2106 2107 /* 2108 * Having given up all of the pager_map we were holding, 2109 * we can now wait for aiodoned to reclaim it for us 2110 * without fear of deadlock. 2111 */ 2112 kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 2113 UVMPAGER_MAPIN_WAITOK); 2114 } 2115 2116 mbp = getiobuf(NULL, true); 2117 UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x", 2118 vp, mbp, vp->v_numoutput, bytes); 2119 mbp->b_bufsize = npages << PAGE_SHIFT; 2120 mbp->b_data = (void *)kva; 2121 mbp->b_resid = mbp->b_bcount = bytes; 2122 mbp->b_cflags = BC_BUSY|BC_AGE; 2123 mbp->b_iodone = uvm_aio_biodone; 2124 2125 bp = NULL; 2126 for (offset = startoffset; 2127 bytes > 0; 2128 offset += iobytes, bytes -= iobytes) { 2129 lbn = offset >> fs_bshift; 2130 error = ulfs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, 2131 lfs_issequential_hole); 2132 if (error) { 2133 UVMHIST_LOG(ubchist, "ulfs_bmaparray() -> %d", 2134 error,0,0,0); 2135 skipbytes += bytes; 2136 bytes = 0; 2137 break; 2138 } 2139 2140 iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, 2141 bytes); 2142 if (blkno == (daddr_t)-1) { 2143 skipbytes += iobytes; 2144 continue; 2145 } 2146 2147 /* 2148 * Discover how much we can really pack into this buffer. 2149 */ 2150 /* If no room in the current segment, finish it up */ 2151 if (sp->sum_bytes_left < sizeof(int32_t) || 2152 sp->seg_bytes_left < (1 << lfs_sb_getbshift(fs))) { 2153 int vers; 2154 2155 lfs_updatemeta(sp); 2156 vers = lfs_fi_getversion(fs, sp->fip); 2157 lfs_release_finfo(fs); 2158 (void) lfs_writeseg(fs, sp); 2159 2160 lfs_acquire_finfo(fs, ip->i_number, vers); 2161 } 2162 /* Check both for space in segment and space in segsum */ 2163 iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) 2164 << fs_bshift); 2165 iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) 2166 << fs_bshift); 2167 KASSERT(iobytes > 0); 2168 2169 /* if it's really one i/o, don't make a second buf */ 2170 if (offset == startoffset && iobytes == bytes) { 2171 bp = mbp; 2172 /* 2173 * All the LFS output is done by the segwriter. It 2174 * will increment numoutput by one for all the bufs it 2175 * recieves. However this buffer needs one extra to 2176 * account for aiodone. 2177 */ 2178 mutex_enter(vp->v_interlock); 2179 vp->v_numoutput++; 2180 mutex_exit(vp->v_interlock); 2181 } else { 2182 bp = getiobuf(NULL, true); 2183 UVMHIST_LOG(ubchist, "vp %p bp %p num now %d", 2184 vp, bp, vp->v_numoutput, 0); 2185 nestiobuf_setup(mbp, bp, offset - pg->offset, iobytes); 2186 /* 2187 * LFS doesn't like async I/O here, dies with 2188 * an assert in lfs_bwrite(). Is that assert 2189 * valid? I retained non-async behaviour when 2190 * converted this to use nestiobuf --pooka 2191 */ 2192 bp->b_flags &= ~B_ASYNC; 2193 } 2194 2195 /* XXX This is silly ... is this necessary? */ 2196 mutex_enter(&bufcache_lock); 2197 mutex_enter(vp->v_interlock); 2198 bgetvp(vp, bp); 2199 mutex_exit(vp->v_interlock); 2200 mutex_exit(&bufcache_lock); 2201 2202 bp->b_lblkno = lfs_lblkno(fs, offset); 2203 bp->b_private = mbp; 2204 if (devvp->v_type == VBLK) { 2205 bp->b_dev = devvp->v_rdev; 2206 } 2207 VOP_BWRITE(bp->b_vp, bp); 2208 while (lfs_gatherblock(sp, bp, NULL)) 2209 continue; 2210 } 2211 2212 nestiobuf_done(mbp, skipbytes, error); 2213 if (skipbytes) { 2214 UVMHIST_LOG(ubchist, "skipbytes %d", skipbytes, 0,0,0); 2215 } 2216 UVMHIST_LOG(ubchist, "returning 0", 0,0,0,0); 2217 2218 if (!async) { 2219 /* Start a segment write. */ 2220 UVMHIST_LOG(ubchist, "flushing", 0,0,0,0); 2221 mutex_enter(&lfs_lock); 2222 lfs_flush(fs, 0, 1); 2223 mutex_exit(&lfs_lock); 2224 } 2225 2226 if ((sp->seg_flags & SEGM_SINGLE) && lfs_sb_getcurseg(fs) != fs->lfs_startseg) 2227 return EAGAIN; 2228 2229 return (0); 2230 2231 tryagain: 2232 /* 2233 * We can't write the pages, for whatever reason. 2234 * Clean up after ourselves, and make the caller try again. 2235 */ 2236 mutex_enter(vp->v_interlock); 2237 2238 /* Tell why we're here, if we know */ 2239 if (failreason != NULL) { 2240 DLOG((DLOG_PAGE, "lfs_gop_write: %s\n", failreason)); 2241 } 2242 if (haveeof && startoffset >= eof) { 2243 DLOG((DLOG_PAGE, "lfs_gop_write: ino %d start 0x%" PRIx64 2244 " eof 0x%" PRIx64 " npages=%d\n", VTOI(vp)->i_number, 2245 pgs[0]->offset, eof, npages)); 2246 } 2247 2248 mutex_enter(&uvm_pageqlock); 2249 for (i = 0; i < npages; i++) { 2250 pg = pgs[i]; 2251 2252 if (pg->flags & PG_PAGEOUT) 2253 uvm_pageout_done(1); 2254 if (pg->flags & PG_DELWRI) { 2255 uvm_pageunwire(pg); 2256 } 2257 uvm_pageactivate(pg); 2258 pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); 2259 DLOG((DLOG_PAGE, "pg[%d] = %p (vp %p off %" PRIx64 ")\n", i, pg, 2260 vp, pg->offset)); 2261 DLOG((DLOG_PAGE, "pg[%d]->flags = %x\n", i, pg->flags)); 2262 DLOG((DLOG_PAGE, "pg[%d]->pqflags = %x\n", i, pg->pqflags)); 2263 DLOG((DLOG_PAGE, "pg[%d]->uanon = %p\n", i, pg->uanon)); 2264 DLOG((DLOG_PAGE, "pg[%d]->uobject = %p\n", i, pg->uobject)); 2265 DLOG((DLOG_PAGE, "pg[%d]->wire_count = %d\n", i, 2266 pg->wire_count)); 2267 DLOG((DLOG_PAGE, "pg[%d]->loan_count = %d\n", i, 2268 pg->loan_count)); 2269 } 2270 /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ 2271 uvm_page_unbusy(pgs, npages); 2272 mutex_exit(&uvm_pageqlock); 2273 mutex_exit(vp->v_interlock); 2274 return EAGAIN; 2275 } 2276 2277 /* 2278 * finish vnode/inode initialization. 2279 * used by lfs_vget. 2280 */ 2281 void 2282 lfs_vinit(struct mount *mp, struct vnode **vpp) 2283 { 2284 struct vnode *vp = *vpp; 2285 struct inode *ip = VTOI(vp); 2286 struct ulfsmount *ump = VFSTOULFS(mp); 2287 struct lfs *fs = ump->um_lfs; 2288 int i; 2289 2290 ip->i_mode = lfs_dino_getmode(fs, ip->i_din); 2291 ip->i_nlink = lfs_dino_getnlink(fs, ip->i_din); 2292 ip->i_lfs_osize = ip->i_size = lfs_dino_getsize(fs, ip->i_din); 2293 ip->i_flags = lfs_dino_getflags(fs, ip->i_din); 2294 ip->i_gen = lfs_dino_getgen(fs, ip->i_din); 2295 ip->i_uid = lfs_dino_getuid(fs, ip->i_din); 2296 ip->i_gid = lfs_dino_getgid(fs, ip->i_din); 2297 2298 ip->i_lfs_effnblks = lfs_dino_getblocks(fs, ip->i_din); 2299 ip->i_lfs_odnlink = lfs_dino_getnlink(fs, ip->i_din); 2300 2301 /* 2302 * Initialize the vnode from the inode, check for aliases. In all 2303 * cases re-init ip, the underlying vnode/inode may have changed. 2304 */ 2305 ulfs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); 2306 ip = VTOI(vp); 2307 2308 memset(ip->i_lfs_fragsize, 0, ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); 2309 if (vp->v_type != VLNK || ip->i_size >= ip->i_lfs->um_maxsymlinklen) { 2310 #ifdef DEBUG 2311 for (i = (ip->i_size + lfs_sb_getbsize(fs) - 1) >> lfs_sb_getbshift(fs); 2312 i < ULFS_NDADDR; i++) { 2313 if ((vp->v_type == VBLK || vp->v_type == VCHR) && 2314 i == 0) 2315 continue; 2316 if (lfs_dino_getdb(fs, ip->i_din, i) != 0) { 2317 lfs_dump_dinode(fs, ip->i_din); 2318 panic("inconsistent inode (direct)"); 2319 } 2320 } 2321 for ( ; i < ULFS_NDADDR + ULFS_NIADDR; i++) { 2322 if (lfs_dino_getib(fs, ip->i_din, i - ULFS_NDADDR) != 0) { 2323 lfs_dump_dinode(fs, ip->i_din); 2324 panic("inconsistent inode (indirect)"); 2325 } 2326 } 2327 #endif /* DEBUG */ 2328 for (i = 0; i < ULFS_NDADDR; i++) 2329 if (lfs_dino_getdb(fs, ip->i_din, i) != 0) 2330 ip->i_lfs_fragsize[i] = lfs_blksize(fs, ip, i); 2331 } 2332 2333 #ifdef DIAGNOSTIC 2334 if (vp->v_type == VNON) { 2335 # ifdef DEBUG 2336 lfs_dump_dinode(fs, ip->i_din); 2337 # endif 2338 panic("lfs_vinit: ino %llu is type VNON! (ifmt=%o)\n", 2339 (unsigned long long)ip->i_number, 2340 (ip->i_mode & LFS_IFMT) >> 12); 2341 } 2342 #endif /* DIAGNOSTIC */ 2343 2344 /* 2345 * Finish inode initialization now that aliasing has been resolved. 2346 */ 2347 2348 ip->i_devvp = fs->lfs_devvp; 2349 vref(ip->i_devvp); 2350 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 2351 ulfsquota_init(ip); 2352 #endif 2353 genfs_node_init(vp, &lfs_genfsops); 2354 uvm_vnp_setsize(vp, ip->i_size); 2355 2356 /* Initialize hiblk from file size */ 2357 ip->i_lfs_hiblk = lfs_lblkno(ip->i_lfs, ip->i_size + lfs_sb_getbsize(ip->i_lfs) - 1) - 1; 2358 2359 *vpp = vp; 2360 } 2361 2362 /* 2363 * Resize the filesystem to contain the specified number of segments. 2364 */ 2365 int 2366 lfs_resize_fs(struct lfs *fs, int newnsegs) 2367 { 2368 SEGUSE *sup; 2369 CLEANERINFO *cip; 2370 struct buf *bp, *obp; 2371 daddr_t olast, nlast, ilast, noff, start, end; 2372 struct vnode *ivp; 2373 struct inode *ip; 2374 int error, badnews, inc, oldnsegs; 2375 int sbbytes, csbbytes, gain, cgain; 2376 int i; 2377 2378 /* Only support v2 and up */ 2379 if (lfs_sb_getversion(fs) < 2) 2380 return EOPNOTSUPP; 2381 2382 /* If we're doing nothing, do it fast */ 2383 oldnsegs = lfs_sb_getnseg(fs); 2384 if (newnsegs == oldnsegs) 2385 return 0; 2386 2387 /* We always have to have two superblocks */ 2388 if (newnsegs <= lfs_dtosn(fs, lfs_sb_getsboff(fs, 1))) 2389 /* XXX this error code is rather nonsense */ 2390 return EFBIG; 2391 2392 ivp = fs->lfs_ivnode; 2393 ip = VTOI(ivp); 2394 error = 0; 2395 2396 /* Take the segment lock so no one else calls lfs_newseg() */ 2397 lfs_seglock(fs, SEGM_PROT); 2398 2399 /* 2400 * Make sure the segments we're going to be losing, if any, 2401 * are in fact empty. We hold the seglock, so their status 2402 * cannot change underneath us. Count the superblocks we lose, 2403 * while we're at it. 2404 */ 2405 sbbytes = csbbytes = 0; 2406 cgain = 0; 2407 for (i = newnsegs; i < oldnsegs; i++) { 2408 LFS_SEGENTRY(sup, fs, i, bp); 2409 badnews = sup->su_nbytes || !(sup->su_flags & SEGUSE_INVAL); 2410 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2411 sbbytes += LFS_SBPAD; 2412 if (!(sup->su_flags & SEGUSE_DIRTY)) { 2413 ++cgain; 2414 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2415 csbbytes += LFS_SBPAD; 2416 } 2417 brelse(bp, 0); 2418 if (badnews) { 2419 error = EBUSY; 2420 goto out; 2421 } 2422 } 2423 2424 /* Note old and new segment table endpoints, and old ifile size */ 2425 olast = lfs_sb_getcleansz(fs) + lfs_sb_getsegtabsz(fs); 2426 nlast = howmany(newnsegs, lfs_sb_getsepb(fs)) + lfs_sb_getcleansz(fs); 2427 ilast = ivp->v_size >> lfs_sb_getbshift(fs); 2428 noff = nlast - olast; 2429 2430 /* 2431 * Make sure no one can use the Ifile while we change it around. 2432 * Even after taking the iflock we need to make sure no one still 2433 * is holding Ifile buffers, so we get each one, to drain them. 2434 * (XXX this could be done better.) 2435 */ 2436 rw_enter(&fs->lfs_iflock, RW_WRITER); 2437 for (i = 0; i < ilast; i++) { 2438 /* XXX what to do if bread fails? */ 2439 bread(ivp, i, lfs_sb_getbsize(fs), 0, &bp); 2440 brelse(bp, 0); 2441 } 2442 2443 /* Allocate new Ifile blocks */ 2444 for (i = ilast; i < ilast + noff; i++) { 2445 if (lfs_balloc(ivp, i * lfs_sb_getbsize(fs), lfs_sb_getbsize(fs), NOCRED, 0, 2446 &bp) != 0) 2447 panic("balloc extending ifile"); 2448 memset(bp->b_data, 0, lfs_sb_getbsize(fs)); 2449 VOP_BWRITE(bp->b_vp, bp); 2450 } 2451 2452 /* Register new ifile size */ 2453 ip->i_size += noff * lfs_sb_getbsize(fs); 2454 lfs_dino_setsize(fs, ip->i_din, ip->i_size); 2455 uvm_vnp_setsize(ivp, ip->i_size); 2456 2457 /* Copy the inode table to its new position */ 2458 if (noff != 0) { 2459 if (noff < 0) { 2460 start = nlast; 2461 end = ilast + noff; 2462 inc = 1; 2463 } else { 2464 start = ilast + noff - 1; 2465 end = nlast - 1; 2466 inc = -1; 2467 } 2468 for (i = start; i != end; i += inc) { 2469 if (bread(ivp, i, lfs_sb_getbsize(fs), 2470 B_MODIFY, &bp) != 0) 2471 panic("resize: bread dst blk failed"); 2472 if (bread(ivp, i - noff, lfs_sb_getbsize(fs), 2473 0, &obp)) 2474 panic("resize: bread src blk failed"); 2475 memcpy(bp->b_data, obp->b_data, lfs_sb_getbsize(fs)); 2476 VOP_BWRITE(bp->b_vp, bp); 2477 brelse(obp, 0); 2478 } 2479 } 2480 2481 /* If we are expanding, write the new empty SEGUSE entries */ 2482 if (newnsegs > oldnsegs) { 2483 for (i = oldnsegs; i < newnsegs; i++) { 2484 if ((error = bread(ivp, i / lfs_sb_getsepb(fs) + 2485 lfs_sb_getcleansz(fs), lfs_sb_getbsize(fs), 2486 B_MODIFY, &bp)) != 0) 2487 panic("lfs: ifile read: %d", error); 2488 while ((i + 1) % lfs_sb_getsepb(fs) && i < newnsegs) { 2489 sup = &((SEGUSE *)bp->b_data)[i % lfs_sb_getsepb(fs)]; 2490 memset(sup, 0, sizeof(*sup)); 2491 i++; 2492 } 2493 VOP_BWRITE(bp->b_vp, bp); 2494 } 2495 } 2496 2497 /* Zero out unused superblock offsets */ 2498 for (i = 2; i < LFS_MAXNUMSB; i++) 2499 if (lfs_dtosn(fs, lfs_sb_getsboff(fs, i)) >= newnsegs) 2500 lfs_sb_setsboff(fs, i, 0x0); 2501 2502 /* 2503 * Correct superblock entries that depend on fs size. 2504 * The computations of these are as follows: 2505 * 2506 * size = lfs_segtod(fs, nseg) 2507 * dsize = lfs_segtod(fs, nseg - minfreeseg) - lfs_btofsb(#super * LFS_SBPAD) 2508 * bfree = dsize - lfs_btofsb(fs, bsize * nseg / 2) - blocks_actually_used 2509 * avail = lfs_segtod(fs, nclean) - lfs_btofsb(#clean_super * LFS_SBPAD) 2510 * + (lfs_segtod(fs, 1) - (offset - curseg)) 2511 * - lfs_segtod(fs, minfreeseg - (minfreeseg / 2)) 2512 * 2513 * XXX - we should probably adjust minfreeseg as well. 2514 */ 2515 gain = (newnsegs - oldnsegs); 2516 lfs_sb_setnseg(fs, newnsegs); 2517 lfs_sb_setsegtabsz(fs, nlast - lfs_sb_getcleansz(fs)); 2518 lfs_sb_addsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); 2519 lfs_sb_adddsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes)); 2520 lfs_sb_addbfree(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes) 2521 - gain * lfs_btofsb(fs, lfs_sb_getbsize(fs) / 2)); 2522 if (gain > 0) { 2523 lfs_sb_addnclean(fs, gain); 2524 lfs_sb_addavail(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); 2525 } else { 2526 lfs_sb_subnclean(fs, cgain); 2527 lfs_sb_subavail(fs, cgain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - 2528 lfs_btofsb(fs, csbbytes)); 2529 } 2530 2531 /* Resize segment flag cache */ 2532 fs->lfs_suflags[0] = realloc(fs->lfs_suflags[0], 2533 lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2534 fs->lfs_suflags[1] = realloc(fs->lfs_suflags[1], 2535 lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2536 for (i = oldnsegs; i < newnsegs; i++) 2537 fs->lfs_suflags[0][i] = fs->lfs_suflags[1][i] = 0x0; 2538 2539 /* Truncate Ifile if necessary */ 2540 if (noff < 0) 2541 lfs_truncate(ivp, ivp->v_size + (noff << lfs_sb_getbshift(fs)), 0, 2542 NOCRED); 2543 2544 /* Update cleaner info so the cleaner can die */ 2545 /* XXX what to do if bread fails? */ 2546 bread(ivp, 0, lfs_sb_getbsize(fs), B_MODIFY, &bp); 2547 cip = bp->b_data; 2548 lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); 2549 lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); 2550 VOP_BWRITE(bp->b_vp, bp); 2551 2552 /* Let Ifile accesses proceed */ 2553 rw_exit(&fs->lfs_iflock); 2554 2555 out: 2556 lfs_segunlock(fs); 2557 return error; 2558 } 2559 2560 /* 2561 * Extended attribute dispatch 2562 */ 2563 int 2564 lfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2565 int attrnamespace, const char *attrname) 2566 { 2567 #ifdef LFS_EXTATTR 2568 struct ulfsmount *ump; 2569 2570 ump = VFSTOULFS(mp); 2571 if (ump->um_fstype == ULFS1) { 2572 return ulfs_extattrctl(mp, cmd, vp, attrnamespace, attrname); 2573 } 2574 #endif 2575 return vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname); 2576 } 2577