1 /* $NetBSD: lfs_vfsops.c,v 1.362 2018/05/28 21:04:38 chs 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 1.362 2018/05/28 21:04:38 chs 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 struct lwp * lfs_writer_daemon = NULL; 132 kcondvar_t lfs_writerd_cv; 133 134 int lfs_do_flush = 0; 135 #ifdef LFS_KERNEL_RFW 136 int lfs_do_rfw = 0; 137 #endif 138 139 const struct vnodeopv_desc * const lfs_vnodeopv_descs[] = { 140 &lfs_vnodeop_opv_desc, 141 &lfs_specop_opv_desc, 142 &lfs_fifoop_opv_desc, 143 NULL, 144 }; 145 146 struct vfsops lfs_vfsops = { 147 .vfs_name = MOUNT_LFS, 148 .vfs_min_mount_data = sizeof (struct ulfs_args), 149 .vfs_mount = lfs_mount, 150 .vfs_start = ulfs_start, 151 .vfs_unmount = lfs_unmount, 152 .vfs_root = ulfs_root, 153 .vfs_quotactl = ulfs_quotactl, 154 .vfs_statvfs = lfs_statvfs, 155 .vfs_sync = lfs_sync, 156 .vfs_vget = lfs_vget, 157 .vfs_loadvnode = lfs_loadvnode, 158 .vfs_newvnode = lfs_newvnode, 159 .vfs_fhtovp = lfs_fhtovp, 160 .vfs_vptofh = lfs_vptofh, 161 .vfs_init = lfs_init, 162 .vfs_reinit = lfs_reinit, 163 .vfs_done = lfs_done, 164 .vfs_mountroot = lfs_mountroot, 165 .vfs_snapshot = (void *)eopnotsupp, 166 .vfs_extattrctl = lfs_extattrctl, 167 .vfs_suspendctl = genfs_suspendctl, 168 .vfs_renamelock_enter = genfs_renamelock_enter, 169 .vfs_renamelock_exit = genfs_renamelock_exit, 170 .vfs_fsync = (void *)eopnotsupp, 171 .vfs_opv_descs = lfs_vnodeopv_descs 172 }; 173 174 const struct genfs_ops lfs_genfsops = { 175 .gop_size = lfs_gop_size, 176 .gop_alloc = ulfs_gop_alloc, 177 .gop_write = lfs_gop_write, 178 .gop_markupdate = ulfs_gop_markupdate, 179 .gop_putrange = genfs_gop_putrange, 180 }; 181 182 struct shortlong { 183 const char *sname; 184 const char *lname; 185 }; 186 187 static int 188 sysctl_lfs_dostats(SYSCTLFN_ARGS) 189 { 190 extern struct lfs_stats lfs_stats; 191 extern int lfs_dostats; 192 int error; 193 194 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 195 if (error || newp == NULL) 196 return (error); 197 198 if (lfs_dostats == 0) 199 memset(&lfs_stats, 0, sizeof(lfs_stats)); 200 201 return (0); 202 } 203 204 static void 205 lfs_sysctl_setup(struct sysctllog **clog) 206 { 207 int i; 208 extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead, 209 lfs_fs_pagetrip, lfs_ignore_lazy_sync; 210 #ifdef DEBUG 211 extern int lfs_debug_log_subsys[DLOG_MAX]; 212 struct shortlong dlog_names[DLOG_MAX] = { /* Must match lfs.h ! */ 213 { "rollforward", "Debug roll-forward code" }, 214 { "alloc", "Debug inode allocation and free list" }, 215 { "avail", "Debug space-available-now accounting" }, 216 { "flush", "Debug flush triggers" }, 217 { "lockedlist", "Debug locked list accounting" }, 218 { "vnode_verbose", "Verbose per-vnode-written debugging" }, 219 { "vnode", "Debug vnode use during segment write" }, 220 { "segment", "Debug segment writing" }, 221 { "seguse", "Debug segment used-bytes accounting" }, 222 { "cleaner", "Debug cleaning routines" }, 223 { "mount", "Debug mount/unmount routines" }, 224 { "pagecache", "Debug UBC interactions" }, 225 { "dirop", "Debug directory-operation accounting" }, 226 { "malloc", "Debug private malloc accounting" }, 227 }; 228 #endif /* DEBUG */ 229 struct shortlong stat_names[] = { /* Must match lfs.h! */ 230 { "segsused", "Number of new segments allocated" }, 231 { "psegwrites", "Number of partial-segment writes" }, 232 { "psyncwrites", "Number of synchronous partial-segment" 233 " writes" }, 234 { "pcleanwrites", "Number of partial-segment writes by the" 235 " cleaner" }, 236 { "blocktot", "Number of blocks written" }, 237 { "cleanblocks", "Number of blocks written by the cleaner" }, 238 { "ncheckpoints", "Number of checkpoints made" }, 239 { "nwrites", "Number of whole writes" }, 240 { "nsync_writes", "Number of synchronous writes" }, 241 { "wait_exceeded", "Number of times writer waited for" 242 " cleaner" }, 243 { "write_exceeded", "Number of times writer invoked flush" }, 244 { "flush_invoked", "Number of times flush was invoked" }, 245 { "vflush_invoked", "Number of time vflush was called" }, 246 { "clean_inlocked", "Number of vnodes skipped for being dead" }, 247 { "clean_vnlocked", "Number of vnodes skipped for vget failure" }, 248 { "segs_reclaimed", "Number of segments reclaimed" }, 249 }; 250 251 sysctl_createv(clog, 0, NULL, NULL, 252 CTLFLAG_PERMANENT, 253 CTLTYPE_NODE, "lfs", 254 SYSCTL_DESCR("Log-structured file system"), 255 NULL, 0, NULL, 0, 256 CTL_VFS, 5, CTL_EOL); 257 /* 258 * XXX the "5" above could be dynamic, thereby eliminating one 259 * more instance of the "number to vfs" mapping problem, but 260 * "5" is the order as taken from sys/mount.h 261 */ 262 263 sysctl_createv(clog, 0, NULL, NULL, 264 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 265 CTLTYPE_INT, "flushindir", NULL, 266 NULL, 0, &lfs_writeindir, 0, 267 CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); 268 sysctl_createv(clog, 0, NULL, NULL, 269 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 270 CTLTYPE_INT, "clean_vnhead", NULL, 271 NULL, 0, &lfs_clean_vnhead, 0, 272 CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); 273 sysctl_createv(clog, 0, NULL, NULL, 274 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 275 CTLTYPE_INT, "dostats", 276 SYSCTL_DESCR("Maintain statistics on LFS operations"), 277 sysctl_lfs_dostats, 0, &lfs_dostats, 0, 278 CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); 279 sysctl_createv(clog, 0, NULL, NULL, 280 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 281 CTLTYPE_INT, "pagetrip", 282 SYSCTL_DESCR("How many dirty pages in fs triggers" 283 " a flush"), 284 NULL, 0, &lfs_fs_pagetrip, 0, 285 CTL_VFS, 5, LFS_FS_PAGETRIP, CTL_EOL); 286 sysctl_createv(clog, 0, NULL, NULL, 287 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 288 CTLTYPE_INT, "ignore_lazy_sync", 289 SYSCTL_DESCR("Lazy Sync is ignored entirely"), 290 NULL, 0, &lfs_ignore_lazy_sync, 0, 291 CTL_VFS, 5, LFS_IGNORE_LAZY_SYNC, CTL_EOL); 292 #ifdef LFS_KERNEL_RFW 293 sysctl_createv(clog, 0, NULL, NULL, 294 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 295 CTLTYPE_INT, "rfw", 296 SYSCTL_DESCR("Use in-kernel roll-forward on mount"), 297 NULL, 0, &lfs_do_rfw, 0, 298 CTL_VFS, 5, LFS_DO_RFW, CTL_EOL); 299 #endif 300 301 sysctl_createv(clog, 0, NULL, NULL, 302 CTLFLAG_PERMANENT, 303 CTLTYPE_NODE, "stats", 304 SYSCTL_DESCR("Debugging options"), 305 NULL, 0, NULL, 0, 306 CTL_VFS, 5, LFS_STATS, CTL_EOL); 307 for (i = 0; i < sizeof(struct lfs_stats) / sizeof(u_int); i++) { 308 sysctl_createv(clog, 0, NULL, NULL, 309 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 310 CTLTYPE_INT, stat_names[i].sname, 311 SYSCTL_DESCR(stat_names[i].lname), 312 NULL, 0, &(((u_int *)&lfs_stats.segsused)[i]), 313 0, CTL_VFS, 5, LFS_STATS, i, CTL_EOL); 314 } 315 316 #ifdef DEBUG 317 sysctl_createv(clog, 0, NULL, NULL, 318 CTLFLAG_PERMANENT, 319 CTLTYPE_NODE, "debug", 320 SYSCTL_DESCR("Debugging options"), 321 NULL, 0, NULL, 0, 322 CTL_VFS, 5, LFS_DEBUGLOG, CTL_EOL); 323 for (i = 0; i < DLOG_MAX; i++) { 324 sysctl_createv(clog, 0, NULL, NULL, 325 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 326 CTLTYPE_INT, dlog_names[i].sname, 327 SYSCTL_DESCR(dlog_names[i].lname), 328 NULL, 0, &(lfs_debug_log_subsys[i]), 0, 329 CTL_VFS, 5, LFS_DEBUGLOG, i, CTL_EOL); 330 } 331 #endif 332 } 333 334 /* old cleaner syscall interface. see VOP_FCNTL() */ 335 static const struct syscall_package lfs_syscalls[] = { 336 { SYS_lfs_bmapv, 0, (sy_call_t *)sys_lfs_bmapv }, 337 { SYS_lfs_markv, 0, (sy_call_t *)sys_lfs_markv }, 338 { SYS___lfs_segwait50, 0, (sy_call_t *)sys___lfs_segwait50 }, 339 { SYS_lfs_segclean, 0, (sy_call_t *)sys_lfs_segclean }, 340 { 0, 0, NULL }, 341 }; 342 343 static int 344 lfs_modcmd(modcmd_t cmd, void *arg) 345 { 346 int error; 347 348 switch (cmd) { 349 case MODULE_CMD_INIT: 350 error = syscall_establish(NULL, lfs_syscalls); 351 if (error) 352 return error; 353 error = vfs_attach(&lfs_vfsops); 354 if (error != 0) { 355 syscall_disestablish(NULL, lfs_syscalls); 356 break; 357 } 358 lfs_sysctl_setup(&lfs_sysctl_log); 359 break; 360 case MODULE_CMD_FINI: 361 error = vfs_detach(&lfs_vfsops); 362 if (error != 0) 363 break; 364 syscall_disestablish(NULL, lfs_syscalls); 365 sysctl_teardown(&lfs_sysctl_log); 366 break; 367 default: 368 error = ENOTTY; 369 break; 370 } 371 372 return (error); 373 } 374 375 /* 376 * XXX Same structure as FFS inodes? Should we share a common pool? 377 */ 378 struct pool lfs_inode_pool; 379 struct pool lfs_dinode_pool; 380 struct pool lfs_inoext_pool; 381 struct pool lfs_lbnentry_pool; 382 383 /* 384 * The writer daemon. UVM keeps track of how many dirty pages we are holding 385 * in lfs_subsys_pages; the daemon flushes the filesystem when this value 386 * crosses the (user-defined) threshhold LFS_MAX_PAGES. 387 */ 388 static void 389 lfs_writerd(void *arg) 390 { 391 mount_iterator_t *iter; 392 struct mount *mp; 393 struct lfs *fs; 394 struct vfsops *vfs = NULL; 395 int fsflags; 396 int lfsc; 397 int wrote_something = 0; 398 399 mutex_enter(&lfs_lock); 400 KASSERTMSG(lfs_writer_daemon == NULL, "more than one LFS writer daemon"); 401 lfs_writer_daemon = curlwp; 402 mutex_exit(&lfs_lock); 403 404 /* Take an extra reference to the LFS vfsops. */ 405 vfs = vfs_getopsbyname(MOUNT_LFS); 406 407 mutex_enter(&lfs_lock); 408 for (;;) { 409 KASSERT(mutex_owned(&lfs_lock)); 410 if (wrote_something == 0) 411 cv_timedwait(&lfs_writerd_cv, &lfs_lock, hz/10 + 1); 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 mountlist_iterator_init(&iter); 451 lfsc = 0; 452 while ((mp = mountlist_iterator_next(iter)) != NULL) { 453 KASSERT(!mutex_owned(&lfs_lock)); 454 if (strncmp(mp->mnt_stat.f_fstypename, MOUNT_LFS, 455 sizeof(mp->mnt_stat.f_fstypename)) == 0) { 456 ++lfsc; 457 fs = VFSTOULFS(mp)->um_lfs; 458 daddr_t ooffset = 0; 459 fsflags = SEGM_SINGLE; 460 461 mutex_enter(&lfs_lock); 462 ooffset = lfs_sb_getoffset(fs); 463 464 if (lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs) && fs->lfs_nowrap) { 465 /* Don't try to write if we're suspended */ 466 mutex_exit(&lfs_lock); 467 continue; 468 } 469 if (LFS_STARVED_FOR_SEGS(fs)) { 470 mutex_exit(&lfs_lock); 471 472 DLOG((DLOG_FLUSH, "lfs_writerd: need cleaning before writing possible\n")); 473 lfs_wakeup_cleaner(fs); 474 continue; 475 } 476 477 if ((fs->lfs_dirvcount > LFS_MAX_FSDIROP(fs) || 478 lfs_dirvcount > LFS_MAX_DIROP) && 479 fs->lfs_dirops == 0) { 480 fsflags &= ~SEGM_SINGLE; 481 fsflags |= SEGM_CKP; 482 DLOG((DLOG_FLUSH, "lfs_writerd: checkpoint\n")); 483 lfs_flush_fs(fs, fsflags); 484 } else if (fs->lfs_pdflush) { 485 DLOG((DLOG_FLUSH, "lfs_writerd: pdflush set\n")); 486 lfs_flush_fs(fs, fsflags); 487 } else if (!TAILQ_EMPTY(&fs->lfs_pchainhd)) { 488 DLOG((DLOG_FLUSH, "lfs_writerd: pchain non-empty\n")); 489 mutex_exit(&lfs_lock); 490 lfs_writer_enter(fs, "wrdirop"); 491 lfs_flush_pchain(fs); 492 lfs_writer_leave(fs); 493 mutex_enter(&lfs_lock); 494 } 495 if (lfs_sb_getoffset(fs) != ooffset) 496 ++wrote_something; 497 mutex_exit(&lfs_lock); 498 } 499 KASSERT(!mutex_owned(&lfs_lock)); 500 } 501 if (lfsc == 0) { 502 mutex_enter(&lfs_lock); 503 lfs_writer_daemon = NULL; 504 mutex_exit(&lfs_lock); 505 mountlist_iterator_destroy(iter); 506 break; 507 } 508 mountlist_iterator_destroy(iter); 509 510 mutex_enter(&lfs_lock); 511 } 512 KASSERT(!mutex_owned(&lfs_lock)); 513 514 /* Give up our extra reference so the module can be unloaded. */ 515 mutex_enter(&vfs_list_lock); 516 if (vfs != NULL) 517 vfs->vfs_refcount--; 518 mutex_exit(&vfs_list_lock); 519 520 /* Done! */ 521 kthread_exit(0); 522 } 523 524 /* 525 * Initialize the filesystem, most work done by ulfs_init. 526 */ 527 void 528 lfs_init(void) 529 { 530 531 /* 532 * XXX: should we use separate pools for 32-bit and 64-bit 533 * dinodes? 534 */ 535 malloc_type_attach(M_SEGMENT); 536 pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, 537 "lfsinopl", &pool_allocator_nointr, IPL_NONE); 538 pool_init(&lfs_dinode_pool, sizeof(union lfs_dinode), 0, 0, 0, 539 "lfsdinopl", &pool_allocator_nointr, IPL_NONE); 540 pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, 541 "lfsinoextpl", &pool_allocator_nointr, IPL_NONE); 542 pool_init(&lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, 543 "lfslbnpool", &pool_allocator_nointr, IPL_NONE); 544 ulfs_init(); 545 546 #ifdef DEBUG 547 memset(lfs_log, 0, sizeof(lfs_log)); 548 #endif 549 mutex_init(&lfs_lock, MUTEX_DEFAULT, IPL_NONE); 550 cv_init(&lfs_writerd_cv, "lfswrite"); 551 cv_init(&locked_queue_cv, "lfsbuf"); 552 cv_init(&lfs_writing_cv, "lfsflush"); 553 } 554 555 void 556 lfs_reinit(void) 557 { 558 ulfs_reinit(); 559 } 560 561 void 562 lfs_done(void) 563 { 564 ulfs_done(); 565 mutex_destroy(&lfs_lock); 566 cv_destroy(&lfs_writerd_cv); 567 cv_destroy(&locked_queue_cv); 568 cv_destroy(&lfs_writing_cv); 569 pool_destroy(&lfs_inode_pool); 570 pool_destroy(&lfs_dinode_pool); 571 pool_destroy(&lfs_inoext_pool); 572 pool_destroy(&lfs_lbnentry_pool); 573 malloc_type_detach(M_SEGMENT); 574 } 575 576 /* 577 * Called by main() when ulfs is going to be mounted as root. 578 */ 579 int 580 lfs_mountroot(void) 581 { 582 extern struct vnode *rootvp; 583 struct lfs *fs = NULL; /* LFS */ 584 struct mount *mp; 585 struct lwp *l = curlwp; 586 struct ulfsmount *ump; 587 int error; 588 589 if (device_class(root_device) != DV_DISK) 590 return (ENODEV); 591 592 if (rootdev == NODEV) 593 return (ENODEV); 594 if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device", &mp))) { 595 vrele(rootvp); 596 return (error); 597 } 598 if ((error = lfs_mountfs(rootvp, mp, l))) { 599 vfs_unbusy(mp); 600 vfs_rele(mp); 601 return (error); 602 } 603 mountlist_append(mp); 604 ump = VFSTOULFS(mp); 605 fs = ump->um_lfs; 606 lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); 607 (void)lfs_statvfs(mp, &mp->mnt_stat); 608 vfs_unbusy(mp); 609 setrootfstime((time_t)lfs_sb_gettstamp(VFSTOULFS(mp)->um_lfs)); 610 return (0); 611 } 612 613 /* 614 * VFS Operations. 615 * 616 * mount system call 617 */ 618 int 619 lfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 620 { 621 struct lwp *l = curlwp; 622 struct vnode *devvp; 623 struct ulfs_args *args = data; 624 struct ulfsmount *ump = NULL; 625 struct lfs *fs = NULL; /* LFS */ 626 int error = 0, update; 627 mode_t accessmode; 628 629 if (args == NULL) 630 return EINVAL; 631 if (*data_len < sizeof *args) 632 return EINVAL; 633 634 if (mp->mnt_flag & MNT_GETARGS) { 635 ump = VFSTOULFS(mp); 636 if (ump == NULL) 637 return EIO; 638 args->fspec = NULL; 639 *data_len = sizeof *args; 640 return 0; 641 } 642 643 update = mp->mnt_flag & MNT_UPDATE; 644 645 /* Check arguments */ 646 if (args->fspec != NULL) { 647 /* 648 * Look up the name and verify that it's sane. 649 */ 650 error = namei_simple_user(args->fspec, 651 NSM_FOLLOW_NOEMULROOT, &devvp); 652 if (error != 0) 653 return (error); 654 655 if (!update) { 656 /* 657 * Be sure this is a valid block device 658 */ 659 if (devvp->v_type != VBLK) 660 error = ENOTBLK; 661 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 662 error = ENXIO; 663 } else { 664 /* 665 * Be sure we're still naming the same device 666 * used for our initial mount 667 * 668 * XXX dholland 20151010: if namei gives us a 669 * different vnode for the same device, 670 * wouldn't it be better to use it going 671 * forward rather than ignore it in favor of 672 * the old one? 673 */ 674 ump = VFSTOULFS(mp); 675 fs = ump->um_lfs; 676 if (devvp != fs->lfs_devvp) { 677 if (devvp->v_rdev != fs->lfs_devvp->v_rdev) 678 error = EINVAL; 679 else { 680 vrele(devvp); 681 devvp = fs->lfs_devvp; 682 vref(devvp); 683 } 684 } 685 } 686 } else { 687 if (!update) { 688 /* New mounts must have a filename for the device */ 689 return (EINVAL); 690 } else { 691 /* Use the extant mount */ 692 ump = VFSTOULFS(mp); 693 fs = ump->um_lfs; 694 devvp = fs->lfs_devvp; 695 vref(devvp); 696 } 697 } 698 699 700 /* 701 * If mount by non-root, then verify that user has necessary 702 * permissions on the device. 703 */ 704 if (error == 0) { 705 accessmode = VREAD; 706 if (update ? 707 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 708 (mp->mnt_flag & MNT_RDONLY) == 0) 709 accessmode |= VWRITE; 710 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 711 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 712 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 713 KAUTH_ARG(accessmode)); 714 VOP_UNLOCK(devvp); 715 } 716 717 if (error) { 718 vrele(devvp); 719 return (error); 720 } 721 722 if (!update) { 723 int flags; 724 725 if (mp->mnt_flag & MNT_RDONLY) 726 flags = FREAD; 727 else 728 flags = FREAD|FWRITE; 729 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 730 error = VOP_OPEN(devvp, flags, FSCRED); 731 VOP_UNLOCK(devvp); 732 if (error) 733 goto fail; 734 error = lfs_mountfs(devvp, mp, l); /* LFS */ 735 if (error) { 736 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 737 (void)VOP_CLOSE(devvp, flags, NOCRED); 738 VOP_UNLOCK(devvp); 739 goto fail; 740 } 741 742 ump = VFSTOULFS(mp); 743 fs = ump->um_lfs; 744 } else { 745 /* 746 * Update the mount. 747 */ 748 749 /* 750 * The initial mount got a reference on this 751 * device, so drop the one obtained via 752 * namei(), above. 753 */ 754 vrele(devvp); 755 756 ump = VFSTOULFS(mp); 757 fs = ump->um_lfs; 758 759 if (fs->lfs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 760 /* 761 * Changing from read/write to read-only. 762 * XXX: shouldn't we sync here? or does vfs do that? 763 */ 764 #ifdef LFS_QUOTA2 765 /* XXX: quotas should remain on when readonly */ 766 if (fs->lfs_use_quota2) { 767 error = lfsquota2_umount(mp, 0); 768 if (error) { 769 return error; 770 } 771 } 772 #endif 773 } 774 775 if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 776 /* 777 * Changing from read-only to read/write. 778 * Note in the superblocks that we're writing. 779 */ 780 781 /* XXX: quotas should have been on even if readonly */ 782 if (fs->lfs_use_quota2) { 783 #ifdef LFS_QUOTA2 784 error = lfs_quota2_mount(mp); 785 #else 786 uprintf("%s: no kernel support for this " 787 "filesystem's quotas\n", 788 mp->mnt_stat.f_mntonname); 789 if (mp->mnt_flag & MNT_FORCE) { 790 uprintf("%s: mounting anyway; " 791 "fsck afterwards\n", 792 mp->mnt_stat.f_mntonname); 793 } else { 794 error = EINVAL; 795 } 796 #endif 797 if (error) { 798 return error; 799 } 800 } 801 802 fs->lfs_ronly = 0; 803 if (lfs_sb_getpflags(fs) & LFS_PF_CLEAN) { 804 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); 805 lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); 806 lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); 807 } 808 } 809 if (args->fspec == NULL) 810 return EINVAL; 811 } 812 813 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 814 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 815 if (error == 0) 816 lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); 817 return error; 818 819 fail: 820 vrele(devvp); 821 return (error); 822 } 823 824 /* 825 * Helper for mountfs. Note that the fs pointer may be a dummy one 826 * pointing into a superblock buffer. (Which is gross; see below.) 827 */ 828 static int 829 lfs_checkmagic(struct lfs *fs) 830 { 831 switch (fs->lfs_dlfs_u.u_32.dlfs_magic) { 832 case LFS_MAGIC: 833 fs->lfs_is64 = false; 834 fs->lfs_dobyteswap = false; 835 break; 836 case LFS64_MAGIC: 837 fs->lfs_is64 = true; 838 fs->lfs_dobyteswap = false; 839 break; 840 #ifdef LFS_EI 841 case LFS_MAGIC_SWAPPED: 842 fs->lfs_is64 = false; 843 fs->lfs_dobyteswap = true; 844 break; 845 case LFS64_MAGIC_SWAPPED: 846 fs->lfs_is64 = true; 847 fs->lfs_dobyteswap = true; 848 break; 849 #endif 850 default: 851 /* XXX needs translation */ 852 return EINVAL; 853 } 854 return 0; 855 } 856 857 /* 858 * Common code for mount and mountroot 859 * LFS specific 860 */ 861 int 862 lfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 863 { 864 static bool lfs_mounted_once = false; 865 struct lfs *primarysb, *altsb, *thesb; 866 struct buf *primarybuf, *altbuf; 867 struct lfs *fs; 868 struct ulfsmount *ump; 869 struct vnode *vp; 870 dev_t dev; 871 int error, i, ronly, fsbsize; 872 kauth_cred_t cred; 873 CLEANERINFO *cip; 874 SEGUSE *sup; 875 daddr_t sb_addr; 876 877 cred = l ? l->l_cred : NOCRED; 878 879 /* The superblock is supposed to be 512 bytes. */ 880 __CTASSERT(sizeof(struct dlfs) == DEV_BSIZE); 881 882 /* 883 * Flush out any old buffers remaining from a previous use. 884 */ 885 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 886 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 887 VOP_UNLOCK(devvp); 888 if (error) 889 return (error); 890 891 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 892 893 /* Don't free random space on error. */ 894 primarybuf = NULL; 895 altbuf = NULL; 896 ump = NULL; 897 898 sb_addr = LFS_LABELPAD / DEV_BSIZE; 899 while (1) { 900 /* 901 * Read in the superblock. 902 * 903 * Note that because LFS_SBPAD is substantially larger 904 * (8K) than the actual on-disk superblock (512 bytes) 905 * the buffer contains enough space to be used as a 906 * whole struct lfs (in-memory superblock) - we do this 907 * only so we can set and use the is64 and dobyteswap 908 * members. XXX this is gross and the logic here should 909 * be reworked. 910 */ 911 error = bread(devvp, sb_addr, LFS_SBPAD, 0, &primarybuf); 912 if (error) 913 goto out; 914 primarysb = (struct lfs *)primarybuf->b_data; 915 916 /* Check the basics. */ 917 error = lfs_checkmagic(primarysb); 918 if (error) { 919 DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock wrong magic\n")); 920 goto out; 921 } 922 if (lfs_sb_getbsize(primarysb) > MAXBSIZE || 923 lfs_sb_getversion(primarysb) > LFS_VERSION || 924 lfs_sb_getbsize(primarysb) < sizeof(struct dlfs)) { 925 DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock sanity failed\n")); 926 /* XXX needs translation */ 927 error = EINVAL; 928 goto out; 929 } 930 if (lfs_sb_getinodefmt(primarysb) > LFS_MAXINODEFMT) { 931 DLOG((DLOG_MOUNT, "lfs_mountfs: unknown inode format %d\n", 932 lfs_sb_getinodefmt(primarysb))); 933 error = EINVAL; 934 goto out; 935 } 936 937 if (lfs_sb_getversion(primarysb) == 1) 938 fsbsize = DEV_BSIZE; 939 else { 940 fsbsize = 1 << lfs_sb_getffshift(primarysb); 941 /* 942 * Could be, if the frag size is large enough, that we 943 * don't have the "real" primary superblock. If that's 944 * the case, get the real one, and try again. 945 */ 946 if (sb_addr != (lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT))) { 947 DLOG((DLOG_MOUNT, "lfs_mountfs: sb daddr" 948 " 0x%llx is not right, trying 0x%llx\n", 949 (long long)sb_addr, 950 (long long)(lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT)))); 951 sb_addr = lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT); 952 brelse(primarybuf, BC_INVAL); 953 continue; 954 } 955 } 956 break; 957 } 958 959 /* 960 * Check the second superblock to see which is newer; then mount 961 * using the older of the two. This is necessary to ensure that 962 * the filesystem is valid if it was not unmounted cleanly. 963 */ 964 965 if (lfs_sb_getsboff(primarysb, 1) && 966 lfs_sb_getsboff(primarysb, 1) - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) 967 { 968 error = bread(devvp, lfs_sb_getsboff(primarysb, 1) * (fsbsize / DEV_BSIZE), 969 LFS_SBPAD, 0, &altbuf); 970 if (error) 971 goto out; 972 altsb = (struct lfs *)altbuf->b_data; 973 974 /* 975 * Note: this used to do the sanity check only if the 976 * timestamp/serial comparison required use of altsb; 977 * this way is less tolerant, but if altsb is corrupted 978 * enough that the magic number, version, and blocksize 979 * are bogus, why would the timestamp or serial fields 980 * mean anything either? If this kind of thing happens, 981 * you need to fsck anyway. 982 */ 983 984 error = lfs_checkmagic(altsb); 985 if (error) 986 goto out; 987 988 /* Check the basics. */ 989 if (lfs_sb_getbsize(altsb) > MAXBSIZE || 990 lfs_sb_getversion(altsb) > LFS_VERSION || 991 lfs_sb_getbsize(altsb) < sizeof(struct dlfs)) { 992 DLOG((DLOG_MOUNT, "lfs_mountfs: alt superblock" 993 " sanity failed\n")); 994 error = EINVAL; /* XXX needs translation */ 995 goto out; 996 } 997 998 if (lfs_sb_getversion(primarysb) == 1) { 999 /* 1s resolution comparison */ 1000 if (lfs_sb_gettstamp(altsb) < lfs_sb_gettstamp(primarysb)) 1001 thesb = altsb; 1002 else 1003 thesb = primarysb; 1004 } else { 1005 /* monotonic infinite-resolution comparison */ 1006 if (lfs_sb_getserial(altsb) < lfs_sb_getserial(primarysb)) 1007 thesb = altsb; 1008 else 1009 thesb = primarysb; 1010 } 1011 } else { 1012 DLOG((DLOG_MOUNT, "lfs_mountfs: invalid alt superblock location" 1013 " daddr=0x%x\n", lfs_sb_getsboff(primarysb, 1))); 1014 error = EINVAL; 1015 goto out; 1016 } 1017 1018 /* 1019 * Allocate the mount structure, copy the superblock into it. 1020 * Note that the 32-bit and 64-bit superblocks are the same size. 1021 */ 1022 fs = kmem_zalloc(sizeof(struct lfs), KM_SLEEP); 1023 memcpy(&fs->lfs_dlfs_u.u_32, &thesb->lfs_dlfs_u.u_32, 1024 sizeof(struct dlfs)); 1025 fs->lfs_is64 = thesb->lfs_is64; 1026 fs->lfs_dobyteswap = thesb->lfs_dobyteswap; 1027 fs->lfs_hasolddirfmt = false; /* set for real below */ 1028 1029 /* Compatibility */ 1030 if (lfs_sb_getversion(fs) < 2) { 1031 lfs_sb_setsumsize(fs, LFS_V1_SUMMARY_SIZE); 1032 lfs_sb_setibsize(fs, lfs_sb_getbsize(fs)); 1033 lfs_sb_sets0addr(fs, lfs_sb_getsboff(fs, 0)); 1034 lfs_sb_settstamp(fs, lfs_sb_getotstamp(fs)); 1035 lfs_sb_setfsbtodb(fs, 0); 1036 } 1037 if (lfs_sb_getresvseg(fs) == 0) 1038 lfs_sb_setresvseg(fs, MIN(lfs_sb_getminfreeseg(fs) - 1, \ 1039 MAX(MIN_RESV_SEGS, lfs_sb_getminfreeseg(fs) / 2 + 1))); 1040 1041 /* 1042 * If we aren't going to be able to write meaningfully to this 1043 * filesystem, and were not mounted readonly, bomb out now. 1044 */ 1045 if (lfs_fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) { 1046 DLOG((DLOG_MOUNT, "lfs_mount: to mount this filesystem read/write," 1047 " we need BUFPAGES >= %lld\n", 1048 (long long)((bufmem_hiwater / bufmem_lowater) * 1049 LFS_INVERSE_MAX_BYTES( 1050 lfs_fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT))); 1051 kmem_free(fs, sizeof(struct lfs)); 1052 error = EFBIG; /* XXX needs translation */ 1053 goto out; 1054 } 1055 1056 /* Before rolling forward, lock so vget will sleep for other procs */ 1057 if (l != NULL) { 1058 fs->lfs_flags = LFS_NOTYET; 1059 fs->lfs_rfpid = l->l_proc->p_pid; 1060 } 1061 1062 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 1063 ump->um_lfs = fs; 1064 ump->um_fstype = fs->lfs_is64 ? ULFS2 : ULFS1; 1065 /* ump->um_cleaner_thread = NULL; */ 1066 brelse(primarybuf, BC_INVAL); 1067 brelse(altbuf, BC_INVAL); 1068 primarybuf = NULL; 1069 altbuf = NULL; 1070 1071 1072 /* Set up the I/O information */ 1073 fs->lfs_devbsize = DEV_BSIZE; 1074 fs->lfs_iocount = 0; 1075 fs->lfs_diropwait = 0; 1076 fs->lfs_activesb = 0; 1077 lfs_sb_setuinodes(fs, 0); 1078 fs->lfs_ravail = 0; 1079 fs->lfs_favail = 0; 1080 fs->lfs_sbactive = 0; 1081 1082 /* Set up the ifile and lock aflags */ 1083 fs->lfs_doifile = 0; 1084 fs->lfs_writer = 0; 1085 fs->lfs_dirops = 0; 1086 fs->lfs_nadirop = 0; 1087 fs->lfs_seglock = 0; 1088 fs->lfs_pdflush = 0; 1089 fs->lfs_sleepers = 0; 1090 fs->lfs_pages = 0; 1091 rw_init(&fs->lfs_fraglock); 1092 rw_init(&fs->lfs_iflock); 1093 cv_init(&fs->lfs_sleeperscv, "lfs_slp"); 1094 cv_init(&fs->lfs_diropscv, "lfs_dirop"); 1095 cv_init(&fs->lfs_stopcv, "lfsstop"); 1096 cv_init(&fs->lfs_nextsegsleep, "segment"); 1097 1098 /* Initialize values for all LFS mounts */ 1099 if (!lfs_mounted_once) { 1100 cv_init(&lfs_allclean_wakeup, "segment"); 1101 lfs_mounted_once = true; 1102 } 1103 1104 /* Set the file system readonly/modify bits. */ 1105 fs->lfs_ronly = ronly; 1106 if (ronly == 0) 1107 fs->lfs_fmod = 1; 1108 1109 /* Device we're using */ 1110 dev = devvp->v_rdev; 1111 fs->lfs_dev = dev; 1112 fs->lfs_devvp = devvp; 1113 1114 /* ulfs-level information */ 1115 fs->um_flags = 0; 1116 fs->um_bptrtodb = lfs_sb_getffshift(fs) - DEV_BSHIFT; 1117 fs->um_seqinc = lfs_sb_getfrag(fs); 1118 fs->um_nindir = lfs_sb_getnindir(fs); 1119 fs->um_lognindir = ffs(lfs_sb_getnindir(fs)) - 1; 1120 fs->um_maxsymlinklen = lfs_sb_getmaxsymlinklen(fs); 1121 fs->um_dirblksiz = LFS_DIRBLKSIZ; 1122 fs->um_maxfilesize = lfs_sb_getmaxfilesize(fs); 1123 1124 /* quota stuff */ 1125 /* XXX: these need to come from the on-disk superblock to be used */ 1126 fs->lfs_use_quota2 = 0; 1127 fs->lfs_quota_magic = 0; 1128 fs->lfs_quota_flags = 0; 1129 fs->lfs_quotaino[0] = 0; 1130 fs->lfs_quotaino[1] = 0; 1131 1132 /* Initialize the mount structure. */ 1133 mp->mnt_data = ump; 1134 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1135 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); 1136 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1137 mp->mnt_stat.f_namemax = LFS_MAXNAMLEN; 1138 mp->mnt_stat.f_iosize = lfs_sb_getbsize(fs); 1139 mp->mnt_flag |= MNT_LOCAL; 1140 mp->mnt_fs_bshift = lfs_sb_getbshift(fs); 1141 if (fs->um_maxsymlinklen > 0) 1142 mp->mnt_iflag |= IMNT_DTYPE; 1143 else 1144 fs->lfs_hasolddirfmt = true; 1145 1146 ump->um_mountp = mp; 1147 for (i = 0; i < ULFS_MAXQUOTAS; i++) 1148 ump->um_quotas[i] = NULLVP; 1149 spec_node_setmountedfs(devvp, mp); 1150 1151 /* Set up reserved memory for pageout */ 1152 lfs_setup_resblks(fs); 1153 /* Set up vdirop tailq */ 1154 TAILQ_INIT(&fs->lfs_dchainhd); 1155 /* and paging tailq */ 1156 TAILQ_INIT(&fs->lfs_pchainhd); 1157 /* and delayed segment accounting for truncation list */ 1158 LIST_INIT(&fs->lfs_segdhd); 1159 1160 /* 1161 * We use the ifile vnode for almost every operation. Instead of 1162 * retrieving it from the hash table each time we retrieve it here, 1163 * artificially increment the reference count and keep a pointer 1164 * to it in the incore copy of the superblock. 1165 */ 1166 if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { 1167 DLOG((DLOG_MOUNT, "lfs_mountfs: ifile vget failed, error=%d\n", error)); 1168 goto out; 1169 } 1170 fs->lfs_ivnode = vp; 1171 vref(vp); 1172 1173 /* Set up inode bitmap and order free list */ 1174 lfs_order_freelist(fs); 1175 1176 /* Set up segment usage flags for the autocleaner. */ 1177 fs->lfs_nactive = 0; 1178 fs->lfs_suflags = malloc(2 * sizeof(u_int32_t *), 1179 M_SEGMENT, M_WAITOK); 1180 fs->lfs_suflags[0] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), 1181 M_SEGMENT, M_WAITOK); 1182 fs->lfs_suflags[1] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), 1183 M_SEGMENT, M_WAITOK); 1184 memset(fs->lfs_suflags[1], 0, lfs_sb_getnseg(fs) * sizeof(u_int32_t)); 1185 for (i = 0; i < lfs_sb_getnseg(fs); i++) { 1186 int changed; 1187 struct buf *bp; 1188 1189 LFS_SEGENTRY(sup, fs, i, bp); 1190 changed = 0; 1191 if (!ronly) { 1192 if (sup->su_nbytes == 0 && 1193 !(sup->su_flags & SEGUSE_EMPTY)) { 1194 sup->su_flags |= SEGUSE_EMPTY; 1195 ++changed; 1196 } else if (!(sup->su_nbytes == 0) && 1197 (sup->su_flags & SEGUSE_EMPTY)) { 1198 sup->su_flags &= ~SEGUSE_EMPTY; 1199 ++changed; 1200 } 1201 if (sup->su_flags & (SEGUSE_ACTIVE|SEGUSE_INVAL)) { 1202 sup->su_flags &= ~(SEGUSE_ACTIVE|SEGUSE_INVAL); 1203 ++changed; 1204 } 1205 } 1206 fs->lfs_suflags[0][i] = sup->su_flags; 1207 if (changed) 1208 LFS_WRITESEGENTRY(sup, fs, i, bp); 1209 else 1210 brelse(bp, 0); 1211 } 1212 1213 /* 1214 * XXX: if the fs has quotas, quotas should be on even if 1215 * readonly. Otherwise you can't query the quota info! 1216 * However, that's not how the quota2 code got written and I 1217 * don't know if it'll behave itself if enabled while 1218 * readonly, so for now use the same enable logic as ffs. 1219 * 1220 * XXX: also, if you use the -f behavior allowed here (and 1221 * equivalently above for remount) it will corrupt the fs. It 1222 * ought not to allow that. It should allow mounting readonly 1223 * if there are quotas and the kernel doesn't have the quota 1224 * code, but only readonly. 1225 * 1226 * XXX: and if you use the -f behavior allowed here it will 1227 * likely crash at unmount time (or remount time) because we 1228 * think quotas are active. 1229 * 1230 * Although none of this applies until there's a way to set 1231 * lfs_use_quota2 and have quotas in the fs at all. 1232 */ 1233 if (!ronly && fs->lfs_use_quota2) { 1234 #ifdef LFS_QUOTA2 1235 error = lfs_quota2_mount(mp); 1236 #else 1237 uprintf("%s: no kernel support for this filesystem's quotas\n", 1238 mp->mnt_stat.f_mntonname); 1239 if (mp->mnt_flag & MNT_FORCE) { 1240 uprintf("%s: mounting anyway; fsck afterwards\n", 1241 mp->mnt_stat.f_mntonname); 1242 } else { 1243 error = EINVAL; 1244 } 1245 #endif 1246 if (error) { 1247 /* XXX XXX must clean up the stuff immediately above */ 1248 printf("lfs_mountfs: sorry, leaking some memory\n"); 1249 goto out; 1250 } 1251 } 1252 1253 #ifdef LFS_KERNEL_RFW 1254 lfs_roll_forward(fs, mp, l); 1255 #endif 1256 1257 /* If writing, sb is not clean; record in case of immediate crash */ 1258 if (!fs->lfs_ronly) { 1259 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); 1260 lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); 1261 lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); 1262 } 1263 1264 /* Allow vget now that roll-forward is complete */ 1265 fs->lfs_flags &= ~(LFS_NOTYET); 1266 wakeup(&fs->lfs_flags); 1267 1268 /* 1269 * Initialize the ifile cleaner info with information from 1270 * the superblock. 1271 */ 1272 { 1273 struct buf *bp; 1274 1275 LFS_CLEANERINFO(cip, fs, bp); 1276 lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); 1277 lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); 1278 lfs_ci_setavail(fs, cip, lfs_sb_getavail(fs)); 1279 lfs_ci_setbfree(fs, cip, lfs_sb_getbfree(fs)); 1280 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 1281 } 1282 1283 /* 1284 * Mark the current segment as ACTIVE, since we're going to 1285 * be writing to it. 1286 */ 1287 { 1288 struct buf *bp; 1289 1290 LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); 1291 sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; 1292 fs->lfs_nactive++; 1293 LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); /* Ifile */ 1294 } 1295 1296 /* Now that roll-forward is done, unlock the Ifile */ 1297 vput(vp); 1298 1299 /* Start the pagedaemon-anticipating daemon */ 1300 mutex_enter(&lfs_lock); 1301 if (lfs_writer_daemon == NULL && 1302 kthread_create(PRI_BIO, 0, NULL, 1303 lfs_writerd, NULL, NULL, "lfs_writer") != 0) 1304 panic("fork lfs_writer"); 1305 mutex_exit(&lfs_lock); 1306 1307 printf("WARNING: the log-structured file system is experimental\n" 1308 "WARNING: it may cause system crashes and/or corrupt data\n"); 1309 1310 return (0); 1311 1312 out: 1313 if (primarybuf) 1314 brelse(primarybuf, BC_INVAL); 1315 if (altbuf) 1316 brelse(altbuf, BC_INVAL); 1317 if (ump) { 1318 kmem_free(ump->um_lfs, sizeof(struct lfs)); 1319 kmem_free(ump, sizeof(*ump)); 1320 mp->mnt_data = NULL; 1321 } 1322 1323 return (error); 1324 } 1325 1326 /* 1327 * unmount system call 1328 */ 1329 int 1330 lfs_unmount(struct mount *mp, int mntflags) 1331 { 1332 struct lwp *l = curlwp; 1333 struct ulfsmount *ump; 1334 struct lfs *fs; 1335 int error, flags, ronly; 1336 vnode_t *vp; 1337 1338 flags = 0; 1339 if (mntflags & MNT_FORCE) 1340 flags |= FORCECLOSE; 1341 1342 ump = VFSTOULFS(mp); 1343 fs = ump->um_lfs; 1344 1345 /* Two checkpoints */ 1346 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1347 lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); 1348 1349 /* wake up the cleaner so it can die */ 1350 /* XXX: shouldn't this be *after* the error cases below? */ 1351 lfs_wakeup_cleaner(fs); 1352 mutex_enter(&lfs_lock); 1353 while (fs->lfs_sleepers) 1354 cv_wait(&fs->lfs_sleeperscv, &lfs_lock); 1355 mutex_exit(&lfs_lock); 1356 1357 #ifdef LFS_EXTATTR 1358 if (ump->um_fstype == ULFS1) { 1359 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_STARTED) { 1360 ulfs_extattr_stop(mp, curlwp); 1361 } 1362 if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_INITIALIZED) { 1363 ulfs_extattr_uepm_destroy(&ump->um_extattr); 1364 mp->mnt_flag &= ~MNT_EXTATTR; 1365 } 1366 } 1367 #endif 1368 #ifdef LFS_QUOTA 1369 if ((error = lfsquota1_umount(mp, flags)) != 0) 1370 return (error); 1371 #endif 1372 #ifdef LFS_QUOTA2 1373 if ((error = lfsquota2_umount(mp, flags)) != 0) 1374 return (error); 1375 #endif 1376 if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) 1377 return (error); 1378 if ((error = VFS_SYNC(mp, 1, l->l_cred)) != 0) 1379 return (error); 1380 vp = fs->lfs_ivnode; 1381 mutex_enter(vp->v_interlock); 1382 if (LIST_FIRST(&vp->v_dirtyblkhd)) 1383 panic("lfs_unmount: still dirty blocks on ifile vnode"); 1384 mutex_exit(vp->v_interlock); 1385 1386 /* Explicitly write the superblock, to update serial and pflags */ 1387 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) | LFS_PF_CLEAN); 1388 lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); 1389 lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); 1390 mutex_enter(&lfs_lock); 1391 while (fs->lfs_iocount) 1392 mtsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount", 0, 1393 &lfs_lock); 1394 mutex_exit(&lfs_lock); 1395 1396 /* Finish with the Ifile, now that we're done with it */ 1397 vgone(fs->lfs_ivnode); 1398 1399 ronly = !fs->lfs_ronly; 1400 if (fs->lfs_devvp->v_type != VBAD) 1401 spec_node_setmountedfs(fs->lfs_devvp, NULL); 1402 vn_lock(fs->lfs_devvp, LK_EXCLUSIVE | LK_RETRY); 1403 error = VOP_CLOSE(fs->lfs_devvp, 1404 ronly ? FREAD : FREAD|FWRITE, NOCRED); 1405 vput(fs->lfs_devvp); 1406 1407 /* Complain about page leakage */ 1408 if (fs->lfs_pages > 0) 1409 printf("lfs_unmount: still claim %d pages (%d in subsystem)\n", 1410 fs->lfs_pages, lfs_subsys_pages); 1411 1412 /* Free per-mount data structures */ 1413 free(fs->lfs_ino_bitmap, M_SEGMENT); 1414 free(fs->lfs_suflags[0], M_SEGMENT); 1415 free(fs->lfs_suflags[1], M_SEGMENT); 1416 free(fs->lfs_suflags, M_SEGMENT); 1417 lfs_free_resblks(fs); 1418 cv_destroy(&fs->lfs_sleeperscv); 1419 cv_destroy(&fs->lfs_diropscv); 1420 cv_destroy(&fs->lfs_stopcv); 1421 cv_destroy(&fs->lfs_nextsegsleep); 1422 1423 rw_destroy(&fs->lfs_fraglock); 1424 rw_destroy(&fs->lfs_iflock); 1425 1426 kmem_free(fs, sizeof(struct lfs)); 1427 kmem_free(ump, sizeof(*ump)); 1428 1429 mp->mnt_data = NULL; 1430 mp->mnt_flag &= ~MNT_LOCAL; 1431 return (error); 1432 } 1433 1434 /* 1435 * Get file system statistics. 1436 * 1437 * NB: We don't lock to access the superblock here, because it's not 1438 * really that important if we get it wrong. 1439 */ 1440 int 1441 lfs_statvfs(struct mount *mp, struct statvfs *sbp) 1442 { 1443 struct lfs *fs; 1444 struct ulfsmount *ump; 1445 1446 ump = VFSTOULFS(mp); 1447 fs = ump->um_lfs; 1448 1449 sbp->f_bsize = lfs_sb_getbsize(fs); 1450 sbp->f_frsize = lfs_sb_getfsize(fs); 1451 sbp->f_iosize = lfs_sb_getbsize(fs); 1452 sbp->f_blocks = LFS_EST_NONMETA(fs) - VTOI(fs->lfs_ivnode)->i_lfs_effnblks; 1453 1454 sbp->f_bfree = LFS_EST_BFREE(fs); 1455 /* 1456 * XXX this should be lfs_sb_getsize (measured in frags) 1457 * rather than dsize (measured in diskblocks). However, 1458 * getsize needs a format version check (for version 1 it 1459 * needs to be blockstofrags'd) so for the moment I'm going to 1460 * leave this... it won't fire wrongly as frags are at least 1461 * as big as diskblocks. 1462 */ 1463 KASSERT(sbp->f_bfree <= lfs_sb_getdsize(fs)); 1464 #if 0 1465 if (sbp->f_bfree < 0) 1466 sbp->f_bfree = 0; 1467 #endif 1468 1469 sbp->f_bresvd = LFS_EST_RSVD(fs); 1470 if (sbp->f_bfree > sbp->f_bresvd) 1471 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1472 else 1473 sbp->f_bavail = 0; 1474 1475 /* XXX: huh? - dholland 20150728 */ 1476 sbp->f_files = lfs_sb_getbfree(fs) / lfs_btofsb(fs, lfs_sb_getibsize(fs)) 1477 * LFS_INOPB(fs); 1478 sbp->f_ffree = sbp->f_files - lfs_sb_getnfiles(fs); 1479 sbp->f_favail = sbp->f_ffree; 1480 sbp->f_fresvd = 0; 1481 copy_statvfs_info(sbp, mp); 1482 return (0); 1483 } 1484 1485 /* 1486 * Go through the disk queues to initiate sandbagged IO; 1487 * go through the inodes to write those that have been modified; 1488 * initiate the writing of the super block if it has been modified. 1489 * 1490 * Note: we are always called with the filesystem marked `MPBUSY'. 1491 */ 1492 int 1493 lfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1494 { 1495 int error; 1496 struct lfs *fs; 1497 1498 fs = VFSTOULFS(mp)->um_lfs; 1499 if (fs->lfs_ronly) 1500 return 0; 1501 1502 /* Snapshots should not hose the syncer */ 1503 /* 1504 * XXX Sync can block here anyway, since we don't have a very 1505 * XXX good idea of how much data is pending. If it's more 1506 * XXX than a segment and lfs_nextseg is close to the end of 1507 * XXX the log, we'll likely block. 1508 */ 1509 mutex_enter(&lfs_lock); 1510 if (fs->lfs_nowrap && lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs)) { 1511 mutex_exit(&lfs_lock); 1512 return 0; 1513 } 1514 mutex_exit(&lfs_lock); 1515 1516 lfs_writer_enter(fs, "lfs_dirops"); 1517 1518 /* All syncs must be checkpoints until roll-forward is implemented. */ 1519 DLOG((DLOG_FLUSH, "lfs_sync at 0x%jx\n", 1520 (uintmax_t)lfs_sb_getoffset(fs))); 1521 error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); 1522 lfs_writer_leave(fs); 1523 #ifdef LFS_QUOTA 1524 lfs_qsync(mp); 1525 #endif 1526 return (error); 1527 } 1528 1529 /* 1530 * Look up an LFS dinode number to find its incore vnode. If not already 1531 * in core, read it in from the specified device. Return the inode locked. 1532 * Detection and handling of mount points must be done by the calling routine. 1533 */ 1534 int 1535 lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1536 { 1537 int error; 1538 1539 error = vcache_get(mp, &ino, sizeof(ino), vpp); 1540 if (error) 1541 return error; 1542 error = vn_lock(*vpp, LK_EXCLUSIVE); 1543 if (error) { 1544 vrele(*vpp); 1545 *vpp = NULL; 1546 return error; 1547 } 1548 1549 return 0; 1550 } 1551 1552 /* 1553 * Create a new vnode/inode pair and initialize what fields we can. 1554 */ 1555 static void 1556 lfs_init_vnode(struct ulfsmount *ump, ino_t ino, struct vnode *vp) 1557 { 1558 struct lfs *fs = ump->um_lfs; 1559 struct inode *ip; 1560 union lfs_dinode *dp; 1561 1562 ASSERT_NO_SEGLOCK(fs); 1563 1564 /* Initialize the inode. */ 1565 ip = pool_get(&lfs_inode_pool, PR_WAITOK); 1566 memset(ip, 0, sizeof(*ip)); 1567 dp = pool_get(&lfs_dinode_pool, PR_WAITOK); 1568 memset(dp, 0, sizeof(*dp)); 1569 ip->inode_ext.lfs = pool_get(&lfs_inoext_pool, PR_WAITOK); 1570 memset(ip->inode_ext.lfs, 0, sizeof(*ip->inode_ext.lfs)); 1571 ip->i_din = dp; 1572 ip->i_ump = ump; 1573 ip->i_vnode = vp; 1574 ip->i_dev = fs->lfs_dev; 1575 lfs_dino_setinumber(fs, dp, ino); 1576 ip->i_number = ino; 1577 ip->i_lfs = fs; 1578 ip->i_lfs_effnblks = 0; 1579 SPLAY_INIT(&ip->i_lfs_lbtree); 1580 ip->i_lfs_nbtree = 0; 1581 LIST_INIT(&ip->i_lfs_segdhd); 1582 1583 vp->v_tag = VT_LFS; 1584 vp->v_op = lfs_vnodeop_p; 1585 vp->v_data = ip; 1586 } 1587 1588 /* 1589 * Undo lfs_init_vnode(). 1590 */ 1591 static void 1592 lfs_deinit_vnode(struct ulfsmount *ump, struct vnode *vp) 1593 { 1594 struct inode *ip = VTOI(vp); 1595 1596 pool_put(&lfs_inoext_pool, ip->inode_ext.lfs); 1597 pool_put(&lfs_dinode_pool, ip->i_din); 1598 pool_put(&lfs_inode_pool, ip); 1599 vp->v_data = NULL; 1600 } 1601 1602 /* 1603 * Read an inode from disk and initialize this vnode / inode pair. 1604 * Caller assures no other thread will try to load this inode. 1605 */ 1606 int 1607 lfs_loadvnode(struct mount *mp, struct vnode *vp, 1608 const void *key, size_t key_len, const void **new_key) 1609 { 1610 struct lfs *fs; 1611 union lfs_dinode *dip; 1612 struct inode *ip; 1613 struct buf *bp; 1614 IFILE *ifp; 1615 struct ulfsmount *ump; 1616 ino_t ino; 1617 daddr_t daddr; 1618 int error, retries; 1619 struct timespec ts; 1620 1621 KASSERT(key_len == sizeof(ino)); 1622 memcpy(&ino, key, key_len); 1623 1624 memset(&ts, 0, sizeof ts); /* XXX gcc */ 1625 1626 ump = VFSTOULFS(mp); 1627 fs = ump->um_lfs; 1628 1629 /* 1630 * If the filesystem is not completely mounted yet, suspend 1631 * any access requests (wait for roll-forward to complete). 1632 */ 1633 mutex_enter(&lfs_lock); 1634 while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) 1635 mtsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet", 0, 1636 &lfs_lock); 1637 mutex_exit(&lfs_lock); 1638 1639 /* Translate the inode number to a disk address. */ 1640 if (ino == LFS_IFILE_INUM) 1641 daddr = lfs_sb_getidaddr(fs); 1642 else { 1643 /* XXX bounds-check this too */ 1644 LFS_IENTRY(ifp, fs, ino, bp); 1645 daddr = lfs_if_getdaddr(fs, ifp); 1646 if (lfs_sb_getversion(fs) > 1) { 1647 ts.tv_sec = lfs_if_getatime_sec(fs, ifp); 1648 ts.tv_nsec = lfs_if_getatime_nsec(fs, ifp); 1649 } 1650 1651 brelse(bp, 0); 1652 if (daddr == LFS_UNUSED_DADDR) 1653 return (ENOENT); 1654 } 1655 1656 /* Allocate/init new vnode/inode. */ 1657 lfs_init_vnode(ump, ino, vp); 1658 ip = VTOI(vp); 1659 1660 /* If the cleaner supplied the inode, use it. */ 1661 if (curlwp == fs->lfs_cleaner_thread && fs->lfs_cleaner_hint != NULL && 1662 fs->lfs_cleaner_hint->bi_lbn == LFS_UNUSED_LBN) { 1663 dip = fs->lfs_cleaner_hint->bi_bp; 1664 if (fs->lfs_is64) { 1665 error = copyin(dip, &ip->i_din->u_64, 1666 sizeof(struct lfs64_dinode)); 1667 } else { 1668 error = copyin(dip, &ip->i_din->u_32, 1669 sizeof(struct lfs32_dinode)); 1670 } 1671 if (error) { 1672 lfs_deinit_vnode(ump, vp); 1673 return error; 1674 } 1675 KASSERT(ip->i_number == ino); 1676 goto out; 1677 } 1678 1679 /* Read in the disk contents for the inode, copy into the inode. */ 1680 retries = 0; 1681 again: 1682 error = bread(fs->lfs_devvp, LFS_FSBTODB(fs, daddr), 1683 (lfs_sb_getversion(fs) == 1 ? lfs_sb_getbsize(fs) : lfs_sb_getibsize(fs)), 1684 0, &bp); 1685 if (error) { 1686 lfs_deinit_vnode(ump, vp); 1687 return error; 1688 } 1689 1690 dip = lfs_ifind(fs, ino, bp); 1691 if (dip == NULL) { 1692 /* Assume write has not completed yet; try again */ 1693 brelse(bp, BC_INVAL); 1694 ++retries; 1695 if (retries <= LFS_IFIND_RETRIES) { 1696 mutex_enter(&lfs_lock); 1697 if (fs->lfs_iocount) { 1698 DLOG((DLOG_VNODE, 1699 "%s: dinode %d not found, retrying...\n", 1700 __func__, ino)); 1701 (void)mtsleep(&fs->lfs_iocount, PRIBIO + 1, 1702 "lfs ifind", 1, &lfs_lock); 1703 } else 1704 retries = LFS_IFIND_RETRIES; 1705 mutex_exit(&lfs_lock); 1706 goto again; 1707 } 1708 #ifdef DEBUG 1709 /* If the seglock is held look at the bpp to see 1710 what is there anyway */ 1711 mutex_enter(&lfs_lock); 1712 if (fs->lfs_seglock > 0) { 1713 struct buf **bpp; 1714 union lfs_dinode *dp; 1715 int i; 1716 1717 for (bpp = fs->lfs_sp->bpp; 1718 bpp != fs->lfs_sp->cbpp; ++bpp) { 1719 if ((*bpp)->b_vp == fs->lfs_ivnode && 1720 bpp != fs->lfs_sp->bpp) { 1721 /* Inode block */ 1722 printf("%s: block 0x%" PRIx64 ": ", 1723 __func__, (*bpp)->b_blkno); 1724 for (i = 0; i < LFS_INOPB(fs); i++) { 1725 dp = DINO_IN_BLOCK(fs, 1726 (*bpp)->b_data, i); 1727 if (lfs_dino_getinumber(fs, dp)) 1728 printf("%ju ", 1729 (uintmax_t)lfs_dino_getinumber(fs, dp)); 1730 } 1731 printf("\n"); 1732 } 1733 } 1734 } 1735 mutex_exit(&lfs_lock); 1736 #endif /* DEBUG */ 1737 panic("lfs_loadvnode: dinode not found"); 1738 } 1739 lfs_copy_dinode(fs, ip->i_din, dip); 1740 brelse(bp, 0); 1741 1742 out: 1743 if (lfs_sb_getversion(fs) > 1) { 1744 lfs_dino_setatime(fs, ip->i_din, ts.tv_sec); 1745 lfs_dino_setatimensec(fs, ip->i_din, ts.tv_nsec); 1746 } 1747 1748 lfs_vinit(mp, &vp); 1749 1750 *new_key = &ip->i_number; 1751 return 0; 1752 } 1753 1754 /* 1755 * Create a new inode and initialize this vnode / inode pair. 1756 */ 1757 int 1758 lfs_newvnode(struct mount *mp, struct vnode *dvp, struct vnode *vp, 1759 struct vattr *vap, kauth_cred_t cred, 1760 size_t *key_len, const void **new_key) 1761 { 1762 ino_t ino; 1763 struct inode *ip; 1764 struct ulfsmount *ump; 1765 struct lfs *fs; 1766 int error, mode, gen; 1767 1768 KASSERT(dvp != NULL || vap->va_fileid > 0); 1769 KASSERT(dvp != NULL && dvp->v_mount == mp); 1770 KASSERT(vap->va_type != VNON); 1771 1772 *key_len = sizeof(ino); 1773 ump = VFSTOULFS(mp); 1774 fs = ump->um_lfs; 1775 mode = MAKEIMODE(vap->va_type, vap->va_mode); 1776 1777 /* 1778 * Allocate fresh inode. With "dvp == NULL" take the inode number 1779 * and version from "vap". 1780 */ 1781 if (dvp == NULL) { 1782 ino = vap->va_fileid; 1783 gen = vap->va_gen; 1784 error = lfs_valloc_fixed(fs, ino, gen); 1785 } else { 1786 error = lfs_valloc(dvp, mode, cred, &ino, &gen); 1787 } 1788 if (error) 1789 return error; 1790 1791 /* Attach inode to vnode. */ 1792 lfs_init_vnode(ump, ino, vp); 1793 ip = VTOI(vp); 1794 1795 mutex_enter(&lfs_lock); 1796 LFS_SET_UINO(ip, IN_CHANGE); 1797 mutex_exit(&lfs_lock); 1798 1799 /* Note no blocks yet */ 1800 ip->i_lfs_hiblk = -1; 1801 1802 /* Set a new generation number for this inode. */ 1803 ip->i_gen = gen; 1804 lfs_dino_setgen(fs, ip->i_din, gen); 1805 1806 memset(ip->i_lfs_fragsize, 0, 1807 ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); 1808 1809 /* Set uid / gid. */ 1810 if (cred == NOCRED || cred == FSCRED) { 1811 ip->i_gid = 0; 1812 ip->i_uid = 0; 1813 } else { 1814 ip->i_gid = VTOI(dvp)->i_gid; 1815 ip->i_uid = kauth_cred_geteuid(cred); 1816 } 1817 DIP_ASSIGN(ip, gid, ip->i_gid); 1818 DIP_ASSIGN(ip, uid, ip->i_uid); 1819 1820 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 1821 error = lfs_chkiq(ip, 1, cred, 0); 1822 if (error) { 1823 lfs_vfree(dvp, ino, mode); 1824 lfs_deinit_vnode(ump, vp); 1825 1826 return error; 1827 } 1828 #endif 1829 1830 /* Set type and finalize. */ 1831 ip->i_flags = 0; 1832 DIP_ASSIGN(ip, flags, 0); 1833 ip->i_mode = mode; 1834 DIP_ASSIGN(ip, mode, mode); 1835 if (vap->va_rdev != VNOVAL) { 1836 /* 1837 * Want to be able to use this to make badblock 1838 * inodes, so don't truncate the dev number. 1839 */ 1840 // XXX clean this up 1841 if (ump->um_fstype == ULFS1) 1842 ip->i_din->u_32.di_rdev = ulfs_rw32(vap->va_rdev, 1843 ULFS_MPNEEDSWAP(fs)); 1844 else 1845 ip->i_din->u_64.di_rdev = ulfs_rw64(vap->va_rdev, 1846 ULFS_MPNEEDSWAP(fs)); 1847 } 1848 lfs_vinit(mp, &vp); 1849 1850 *new_key = &ip->i_number; 1851 return 0; 1852 } 1853 1854 /* 1855 * File handle to vnode 1856 */ 1857 int 1858 lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1859 { 1860 struct lfid lfh; 1861 struct lfs *fs; 1862 1863 if (fhp->fid_len != sizeof(struct lfid)) 1864 return EINVAL; 1865 1866 memcpy(&lfh, fhp, sizeof(lfh)); 1867 if (lfh.lfid_ino < LFS_IFILE_INUM) 1868 return ESTALE; 1869 1870 fs = VFSTOULFS(mp)->um_lfs; 1871 if (lfh.lfid_ident != lfs_sb_getident(fs)) 1872 return ESTALE; 1873 1874 if (lfh.lfid_ino > 1875 ((lfs_dino_getsize(fs, VTOI(fs->lfs_ivnode)->i_din) >> lfs_sb_getbshift(fs)) - 1876 lfs_sb_getcleansz(fs) - lfs_sb_getsegtabsz(fs)) * lfs_sb_getifpb(fs)) 1877 return ESTALE; 1878 1879 return (ulfs_fhtovp(mp, &lfh.lfid_ufid, vpp)); 1880 } 1881 1882 /* 1883 * Vnode pointer to File handle 1884 */ 1885 /* ARGSUSED */ 1886 int 1887 lfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1888 { 1889 struct inode *ip; 1890 struct lfid lfh; 1891 1892 if (*fh_size < sizeof(struct lfid)) { 1893 *fh_size = sizeof(struct lfid); 1894 return E2BIG; 1895 } 1896 *fh_size = sizeof(struct lfid); 1897 ip = VTOI(vp); 1898 memset(&lfh, 0, sizeof(lfh)); 1899 lfh.lfid_len = sizeof(struct lfid); 1900 lfh.lfid_ino = ip->i_number; 1901 lfh.lfid_gen = ip->i_gen; 1902 lfh.lfid_ident = lfs_sb_getident(ip->i_lfs); 1903 memcpy(fhp, &lfh, sizeof(lfh)); 1904 return (0); 1905 } 1906 1907 /* 1908 * ulfs_bmaparray callback function for writing. 1909 * 1910 * Since blocks will be written to the new segment anyway, 1911 * we don't care about current daddr of them. 1912 */ 1913 static bool 1914 lfs_issequential_hole(const struct lfs *fs, 1915 daddr_t daddr0, daddr_t daddr1) 1916 { 1917 (void)fs; /* not used */ 1918 1919 KASSERT(daddr0 == UNWRITTEN || 1920 (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR(fs))); 1921 KASSERT(daddr1 == UNWRITTEN || 1922 (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR(fs))); 1923 1924 /* NOTE: all we want to know here is 'hole or not'. */ 1925 /* NOTE: UNASSIGNED is converted to 0 by ulfs_bmaparray. */ 1926 1927 /* 1928 * treat UNWRITTENs and all resident blocks as 'contiguous' 1929 */ 1930 if (daddr0 != 0 && daddr1 != 0) 1931 return true; 1932 1933 /* 1934 * both are in hole? 1935 */ 1936 if (daddr0 == 0 && daddr1 == 0) 1937 return true; /* all holes are 'contiguous' for us. */ 1938 1939 return false; 1940 } 1941 1942 /* 1943 * lfs_gop_write functions exactly like genfs_gop_write, except that 1944 * (1) it requires the seglock to be held by its caller, and sp->fip 1945 * to be properly initialized (it will return without re-initializing 1946 * sp->fip, and without calling lfs_writeseg). 1947 * (2) it uses the remaining space in the segment, rather than VOP_BMAP, 1948 * to determine how large a block it can write at once (though it does 1949 * still use VOP_BMAP to find holes in the file); 1950 * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks 1951 * (leaving lfs_writeseg to deal with the cluster blocks, so we might 1952 * now have clusters of clusters, ick.) 1953 */ 1954 static int 1955 lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, 1956 int flags) 1957 { 1958 int i, error, run, haveeof = 0; 1959 int fs_bshift; 1960 vaddr_t kva; 1961 off_t eof, offset, startoffset = 0; 1962 size_t bytes, iobytes, skipbytes; 1963 bool async = (flags & PGO_SYNCIO) == 0; 1964 daddr_t lbn, blkno; 1965 struct vm_page *pg; 1966 struct buf *mbp, *bp; 1967 struct vnode *devvp = VTOI(vp)->i_devvp; 1968 struct inode *ip = VTOI(vp); 1969 struct lfs *fs = ip->i_lfs; 1970 struct segment *sp = fs->lfs_sp; 1971 SEGSUM *ssp; 1972 UVMHIST_FUNC("lfs_gop_write"); UVMHIST_CALLED(ubchist); 1973 const char * failreason = NULL; 1974 1975 ASSERT_SEGLOCK(fs); 1976 1977 /* The Ifile lives in the buffer cache */ 1978 KASSERT(vp != fs->lfs_ivnode); 1979 1980 /* 1981 * We don't want to fill the disk before the cleaner has a chance 1982 * to make room for us. If we're in danger of doing that, fail 1983 * with EAGAIN. The caller will have to notice this, unlock 1984 * so the cleaner can run, relock and try again. 1985 * 1986 * We must write everything, however, if our vnode is being 1987 * reclaimed. 1988 */ 1989 mutex_enter(vp->v_interlock); 1990 if (LFS_STARVED_FOR_SEGS(fs) && vdead_check(vp, VDEAD_NOWAIT) == 0) { 1991 mutex_exit(vp->v_interlock); 1992 failreason = "Starved for segs and not flushing vp"; 1993 goto tryagain; 1994 } 1995 mutex_exit(vp->v_interlock); 1996 1997 /* 1998 * Sometimes things slip past the filters in lfs_putpages, 1999 * and the pagedaemon tries to write pages---problem is 2000 * that the pagedaemon never acquires the segment lock. 2001 * 2002 * Alternatively, pages that were clean when we called 2003 * genfs_putpages may have become dirty in the meantime. In this 2004 * case the segment header is not properly set up for blocks 2005 * to be added to it. 2006 * 2007 * Unbusy and unclean the pages, and put them on the ACTIVE 2008 * queue under the hypothesis that they couldn't have got here 2009 * unless they were modified *quite* recently. 2010 * 2011 * XXXUBC that last statement is an oversimplification of course. 2012 */ 2013 if (!LFS_SEGLOCK_HELD(fs)) { 2014 failreason = "Seglock not held"; 2015 goto tryagain; 2016 } 2017 if (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) { 2018 failreason = "Inode with no_gop_write"; 2019 goto tryagain; 2020 } 2021 if ((pgs[0]->offset & lfs_sb_getbmask(fs)) != 0) { 2022 failreason = "Bad page offset"; 2023 goto tryagain; 2024 } 2025 2026 UVMHIST_LOG(ubchist, "vp %#jx pgs %#jx npages %jd flags 0x%jx", 2027 (uintptr_t)vp, (uintptr_t)pgs, npages, flags); 2028 2029 GOP_SIZE(vp, vp->v_size, &eof, 0); 2030 haveeof = 1; 2031 2032 if (vp->v_type == VREG) 2033 fs_bshift = vp->v_mount->mnt_fs_bshift; 2034 else 2035 fs_bshift = DEV_BSHIFT; 2036 error = 0; 2037 pg = pgs[0]; 2038 startoffset = pg->offset; 2039 KASSERT(eof >= 0); 2040 2041 if (startoffset >= eof) { 2042 failreason = "Offset beyond EOF"; 2043 goto tryagain; 2044 } else 2045 bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); 2046 skipbytes = 0; 2047 2048 KASSERT(bytes != 0); 2049 2050 /* Swap PG_DELWRI for PG_PAGEOUT */ 2051 for (i = 0; i < npages; i++) { 2052 if (pgs[i]->flags & PG_DELWRI) { 2053 KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); 2054 pgs[i]->flags &= ~PG_DELWRI; 2055 pgs[i]->flags |= PG_PAGEOUT; 2056 uvm_pageout_start(1); 2057 mutex_enter(vp->v_interlock); 2058 mutex_enter(&uvm_pageqlock); 2059 uvm_pageunwire(pgs[i]); 2060 mutex_exit(&uvm_pageqlock); 2061 mutex_exit(vp->v_interlock); 2062 } 2063 } 2064 2065 /* 2066 * Check to make sure we're starting on a block boundary. 2067 * We'll check later to make sure we always write entire 2068 * blocks (or fragments). 2069 */ 2070 if (startoffset & lfs_sb_getbmask(fs)) 2071 printf("%" PRId64 " & %" PRIu64 " = %" PRId64 "\n", 2072 startoffset, lfs_sb_getbmask(fs), 2073 startoffset & lfs_sb_getbmask(fs)); 2074 KASSERT((startoffset & lfs_sb_getbmask(fs)) == 0); 2075 if (bytes & lfs_sb_getffmask(fs)) { 2076 printf("lfs_gop_write: asked to write %ld bytes\n", (long)bytes); 2077 panic("lfs_gop_write: non-integer blocks"); 2078 } 2079 2080 /* 2081 * We could deadlock here on pager_map with UVMPAGER_MAPIN_WAITOK. 2082 * If we would, write what we have and try again. If we don't 2083 * have anything to write, we'll have to sleep. 2084 */ 2085 ssp = (SEGSUM *)sp->segsum; 2086 if ((kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 2087 (lfs_ss_getnfinfo(fs, ssp) < 1 ? 2088 UVMPAGER_MAPIN_WAITOK : 0))) == 0x0) { 2089 DLOG((DLOG_PAGE, "lfs_gop_write: forcing write\n")); 2090 #if 0 2091 " with nfinfo=%d at offset 0x%jx\n", 2092 (int)lfs_ss_getnfinfo(fs, ssp), 2093 (uintmax_t)lfs_sb_getoffset(fs))); 2094 #endif 2095 lfs_updatemeta(sp); 2096 lfs_release_finfo(fs); 2097 (void) lfs_writeseg(fs, sp); 2098 2099 lfs_acquire_finfo(fs, ip->i_number, ip->i_gen); 2100 2101 /* 2102 * Having given up all of the pager_map we were holding, 2103 * we can now wait for aiodoned to reclaim it for us 2104 * without fear of deadlock. 2105 */ 2106 kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | 2107 UVMPAGER_MAPIN_WAITOK); 2108 } 2109 2110 mbp = getiobuf(NULL, true); 2111 UVMHIST_LOG(ubchist, "vp %#jx mbp %#jx num now %jd bytes 0x%jx", 2112 (uintptr_t)vp, (uintptr_t)mbp, vp->v_numoutput, bytes); 2113 mbp->b_bufsize = npages << PAGE_SHIFT; 2114 mbp->b_data = (void *)kva; 2115 mbp->b_resid = mbp->b_bcount = bytes; 2116 mbp->b_cflags = BC_BUSY|BC_AGE; 2117 mbp->b_iodone = uvm_aio_biodone; 2118 2119 bp = NULL; 2120 for (offset = startoffset; 2121 bytes > 0; 2122 offset += iobytes, bytes -= iobytes) { 2123 lbn = offset >> fs_bshift; 2124 error = ulfs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, 2125 lfs_issequential_hole); 2126 if (error) { 2127 UVMHIST_LOG(ubchist, "ulfs_bmaparray() -> %jd", 2128 error,0,0,0); 2129 skipbytes += bytes; 2130 bytes = 0; 2131 break; 2132 } 2133 2134 iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, 2135 bytes); 2136 if (blkno == (daddr_t)-1) { 2137 skipbytes += iobytes; 2138 continue; 2139 } 2140 2141 /* 2142 * Discover how much we can really pack into this buffer. 2143 */ 2144 /* If no room in the current segment, finish it up */ 2145 if (sp->sum_bytes_left < sizeof(int32_t) || 2146 sp->seg_bytes_left < (1 << lfs_sb_getbshift(fs))) { 2147 int vers; 2148 2149 lfs_updatemeta(sp); 2150 vers = lfs_fi_getversion(fs, sp->fip); 2151 lfs_release_finfo(fs); 2152 (void) lfs_writeseg(fs, sp); 2153 2154 lfs_acquire_finfo(fs, ip->i_number, vers); 2155 } 2156 /* Check both for space in segment and space in segsum */ 2157 iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) 2158 << fs_bshift); 2159 iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) 2160 << fs_bshift); 2161 KASSERT(iobytes > 0); 2162 2163 /* if it's really one i/o, don't make a second buf */ 2164 if (offset == startoffset && iobytes == bytes) { 2165 bp = mbp; 2166 /* 2167 * All the LFS output is done by the segwriter. It 2168 * will increment numoutput by one for all the bufs it 2169 * recieves. However this buffer needs one extra to 2170 * account for aiodone. 2171 */ 2172 mutex_enter(vp->v_interlock); 2173 vp->v_numoutput++; 2174 mutex_exit(vp->v_interlock); 2175 } else { 2176 bp = getiobuf(NULL, true); 2177 UVMHIST_LOG(ubchist, "vp %#jx bp %#jx num now %jd", 2178 (uintptr_t)vp, (uintptr_t)bp, vp->v_numoutput, 0); 2179 nestiobuf_setup(mbp, bp, offset - pg->offset, iobytes); 2180 /* 2181 * LFS doesn't like async I/O here, dies with 2182 * an assert in lfs_bwrite(). Is that assert 2183 * valid? I retained non-async behaviour when 2184 * converted this to use nestiobuf --pooka 2185 */ 2186 bp->b_flags &= ~B_ASYNC; 2187 } 2188 2189 /* XXX This is silly ... is this necessary? */ 2190 mutex_enter(&bufcache_lock); 2191 mutex_enter(vp->v_interlock); 2192 bgetvp(vp, bp); 2193 mutex_exit(vp->v_interlock); 2194 mutex_exit(&bufcache_lock); 2195 2196 bp->b_lblkno = lfs_lblkno(fs, offset); 2197 bp->b_private = mbp; 2198 if (devvp->v_type == VBLK) { 2199 bp->b_dev = devvp->v_rdev; 2200 } 2201 VOP_BWRITE(bp->b_vp, bp); 2202 while (lfs_gatherblock(sp, bp, NULL)) 2203 continue; 2204 } 2205 2206 nestiobuf_done(mbp, skipbytes, error); 2207 if (skipbytes) { 2208 UVMHIST_LOG(ubchist, "skipbytes %jd", skipbytes, 0,0,0); 2209 } 2210 UVMHIST_LOG(ubchist, "returning 0", 0,0,0,0); 2211 2212 if (!async) { 2213 /* Start a segment write. */ 2214 UVMHIST_LOG(ubchist, "flushing", 0,0,0,0); 2215 mutex_enter(&lfs_lock); 2216 lfs_flush(fs, 0, 1); 2217 mutex_exit(&lfs_lock); 2218 } 2219 2220 if ((sp->seg_flags & SEGM_SINGLE) && lfs_sb_getcurseg(fs) != fs->lfs_startseg) 2221 return EAGAIN; 2222 2223 return (0); 2224 2225 tryagain: 2226 /* 2227 * We can't write the pages, for whatever reason. 2228 * Clean up after ourselves, and make the caller try again. 2229 */ 2230 mutex_enter(vp->v_interlock); 2231 2232 /* Tell why we're here, if we know */ 2233 if (failreason != NULL) { 2234 DLOG((DLOG_PAGE, "lfs_gop_write: %s\n", failreason)); 2235 } 2236 if (haveeof && startoffset >= eof) { 2237 DLOG((DLOG_PAGE, "lfs_gop_write: ino %d start 0x%" PRIx64 2238 " eof 0x%" PRIx64 " npages=%d\n", VTOI(vp)->i_number, 2239 pgs[0]->offset, eof, npages)); 2240 } 2241 2242 mutex_enter(&uvm_pageqlock); 2243 for (i = 0; i < npages; i++) { 2244 pg = pgs[i]; 2245 2246 if (pg->flags & PG_PAGEOUT) 2247 uvm_pageout_done(1); 2248 if (pg->flags & PG_DELWRI) { 2249 uvm_pageunwire(pg); 2250 } 2251 uvm_pageactivate(pg); 2252 pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); 2253 DLOG((DLOG_PAGE, "pg[%d] = %p (vp %p off %" PRIx64 ")\n", i, pg, 2254 vp, pg->offset)); 2255 DLOG((DLOG_PAGE, "pg[%d]->flags = %x\n", i, pg->flags)); 2256 DLOG((DLOG_PAGE, "pg[%d]->pqflags = %x\n", i, pg->pqflags)); 2257 DLOG((DLOG_PAGE, "pg[%d]->uanon = %p\n", i, pg->uanon)); 2258 DLOG((DLOG_PAGE, "pg[%d]->uobject = %p\n", i, pg->uobject)); 2259 DLOG((DLOG_PAGE, "pg[%d]->wire_count = %d\n", i, 2260 pg->wire_count)); 2261 DLOG((DLOG_PAGE, "pg[%d]->loan_count = %d\n", i, 2262 pg->loan_count)); 2263 } 2264 /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ 2265 uvm_page_unbusy(pgs, npages); 2266 mutex_exit(&uvm_pageqlock); 2267 mutex_exit(vp->v_interlock); 2268 return EAGAIN; 2269 } 2270 2271 /* 2272 * finish vnode/inode initialization. 2273 * used by lfs_vget. 2274 */ 2275 void 2276 lfs_vinit(struct mount *mp, struct vnode **vpp) 2277 { 2278 struct vnode *vp = *vpp; 2279 struct inode *ip = VTOI(vp); 2280 struct ulfsmount *ump = VFSTOULFS(mp); 2281 struct lfs *fs = ump->um_lfs; 2282 int i; 2283 2284 ip->i_mode = lfs_dino_getmode(fs, ip->i_din); 2285 ip->i_nlink = lfs_dino_getnlink(fs, ip->i_din); 2286 ip->i_lfs_osize = ip->i_size = lfs_dino_getsize(fs, ip->i_din); 2287 ip->i_flags = lfs_dino_getflags(fs, ip->i_din); 2288 ip->i_gen = lfs_dino_getgen(fs, ip->i_din); 2289 ip->i_uid = lfs_dino_getuid(fs, ip->i_din); 2290 ip->i_gid = lfs_dino_getgid(fs, ip->i_din); 2291 2292 ip->i_lfs_effnblks = lfs_dino_getblocks(fs, ip->i_din); 2293 ip->i_lfs_odnlink = lfs_dino_getnlink(fs, ip->i_din); 2294 2295 /* 2296 * Initialize the vnode from the inode, check for aliases. In all 2297 * cases re-init ip, the underlying vnode/inode may have changed. 2298 */ 2299 ulfs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); 2300 ip = VTOI(vp); 2301 2302 memset(ip->i_lfs_fragsize, 0, ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); 2303 if (vp->v_type != VLNK || ip->i_size >= ip->i_lfs->um_maxsymlinklen) { 2304 #ifdef DEBUG 2305 for (i = (ip->i_size + lfs_sb_getbsize(fs) - 1) >> lfs_sb_getbshift(fs); 2306 i < ULFS_NDADDR; i++) { 2307 if ((vp->v_type == VBLK || vp->v_type == VCHR) && 2308 i == 0) 2309 continue; 2310 if (lfs_dino_getdb(fs, ip->i_din, i) != 0) { 2311 lfs_dump_dinode(fs, ip->i_din); 2312 panic("inconsistent inode (direct)"); 2313 } 2314 } 2315 for ( ; i < ULFS_NDADDR + ULFS_NIADDR; i++) { 2316 if (lfs_dino_getib(fs, ip->i_din, i - ULFS_NDADDR) != 0) { 2317 lfs_dump_dinode(fs, ip->i_din); 2318 panic("inconsistent inode (indirect)"); 2319 } 2320 } 2321 #endif /* DEBUG */ 2322 for (i = 0; i < ULFS_NDADDR; i++) 2323 if (lfs_dino_getdb(fs, ip->i_din, i) != 0) 2324 ip->i_lfs_fragsize[i] = lfs_blksize(fs, ip, i); 2325 } 2326 2327 KASSERTMSG((vp->v_type != VNON), 2328 "lfs_vinit: ino %llu is type VNON! (ifmt=%o)\n", 2329 (unsigned long long)ip->i_number, 2330 (ip->i_mode & LFS_IFMT) >> 12); 2331 2332 /* 2333 * Finish inode initialization now that aliasing has been resolved. 2334 */ 2335 2336 ip->i_devvp = fs->lfs_devvp; 2337 vref(ip->i_devvp); 2338 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 2339 ulfsquota_init(ip); 2340 #endif 2341 genfs_node_init(vp, &lfs_genfsops); 2342 uvm_vnp_setsize(vp, ip->i_size); 2343 2344 /* Initialize hiblk from file size */ 2345 ip->i_lfs_hiblk = lfs_lblkno(ip->i_lfs, ip->i_size + lfs_sb_getbsize(ip->i_lfs) - 1) - 1; 2346 2347 *vpp = vp; 2348 } 2349 2350 /* 2351 * Resize the filesystem to contain the specified number of segments. 2352 */ 2353 int 2354 lfs_resize_fs(struct lfs *fs, int newnsegs) 2355 { 2356 SEGUSE *sup; 2357 CLEANERINFO *cip; 2358 struct buf *bp, *obp; 2359 daddr_t olast, nlast, ilast, noff, start, end; 2360 struct vnode *ivp; 2361 struct inode *ip; 2362 int error, badnews, inc, oldnsegs; 2363 int sbbytes, csbbytes, gain, cgain; 2364 int i; 2365 2366 /* Only support v2 and up */ 2367 if (lfs_sb_getversion(fs) < 2) 2368 return EOPNOTSUPP; 2369 2370 /* If we're doing nothing, do it fast */ 2371 oldnsegs = lfs_sb_getnseg(fs); 2372 if (newnsegs == oldnsegs) 2373 return 0; 2374 2375 /* We always have to have two superblocks */ 2376 if (newnsegs <= lfs_dtosn(fs, lfs_sb_getsboff(fs, 1))) 2377 /* XXX this error code is rather nonsense */ 2378 return EFBIG; 2379 2380 ivp = fs->lfs_ivnode; 2381 ip = VTOI(ivp); 2382 error = 0; 2383 2384 /* Take the segment lock so no one else calls lfs_newseg() */ 2385 lfs_seglock(fs, SEGM_PROT); 2386 2387 /* 2388 * Make sure the segments we're going to be losing, if any, 2389 * are in fact empty. We hold the seglock, so their status 2390 * cannot change underneath us. Count the superblocks we lose, 2391 * while we're at it. 2392 */ 2393 sbbytes = csbbytes = 0; 2394 cgain = 0; 2395 for (i = newnsegs; i < oldnsegs; i++) { 2396 LFS_SEGENTRY(sup, fs, i, bp); 2397 badnews = sup->su_nbytes || !(sup->su_flags & SEGUSE_INVAL); 2398 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2399 sbbytes += LFS_SBPAD; 2400 if (!(sup->su_flags & SEGUSE_DIRTY)) { 2401 ++cgain; 2402 if (sup->su_flags & SEGUSE_SUPERBLOCK) 2403 csbbytes += LFS_SBPAD; 2404 } 2405 brelse(bp, 0); 2406 if (badnews) { 2407 error = EBUSY; 2408 goto out; 2409 } 2410 } 2411 2412 /* Note old and new segment table endpoints, and old ifile size */ 2413 olast = lfs_sb_getcleansz(fs) + lfs_sb_getsegtabsz(fs); 2414 nlast = howmany(newnsegs, lfs_sb_getsepb(fs)) + lfs_sb_getcleansz(fs); 2415 ilast = ivp->v_size >> lfs_sb_getbshift(fs); 2416 noff = nlast - olast; 2417 2418 /* 2419 * Make sure no one can use the Ifile while we change it around. 2420 * Even after taking the iflock we need to make sure no one still 2421 * is holding Ifile buffers, so we get each one, to drain them. 2422 * (XXX this could be done better.) 2423 */ 2424 rw_enter(&fs->lfs_iflock, RW_WRITER); 2425 for (i = 0; i < ilast; i++) { 2426 /* XXX what to do if bread fails? */ 2427 bread(ivp, i, lfs_sb_getbsize(fs), 0, &bp); 2428 brelse(bp, 0); 2429 } 2430 2431 /* Allocate new Ifile blocks */ 2432 for (i = ilast; i < ilast + noff; i++) { 2433 if (lfs_balloc(ivp, i * lfs_sb_getbsize(fs), lfs_sb_getbsize(fs), NOCRED, 0, 2434 &bp) != 0) 2435 panic("balloc extending ifile"); 2436 memset(bp->b_data, 0, lfs_sb_getbsize(fs)); 2437 VOP_BWRITE(bp->b_vp, bp); 2438 } 2439 2440 /* Register new ifile size */ 2441 ip->i_size += noff * lfs_sb_getbsize(fs); 2442 lfs_dino_setsize(fs, ip->i_din, ip->i_size); 2443 uvm_vnp_setsize(ivp, ip->i_size); 2444 2445 /* Copy the inode table to its new position */ 2446 if (noff != 0) { 2447 if (noff < 0) { 2448 start = nlast; 2449 end = ilast + noff; 2450 inc = 1; 2451 } else { 2452 start = ilast + noff - 1; 2453 end = nlast - 1; 2454 inc = -1; 2455 } 2456 for (i = start; i != end; i += inc) { 2457 if (bread(ivp, i, lfs_sb_getbsize(fs), 2458 B_MODIFY, &bp) != 0) 2459 panic("resize: bread dst blk failed"); 2460 if (bread(ivp, i - noff, lfs_sb_getbsize(fs), 2461 0, &obp)) 2462 panic("resize: bread src blk failed"); 2463 memcpy(bp->b_data, obp->b_data, lfs_sb_getbsize(fs)); 2464 VOP_BWRITE(bp->b_vp, bp); 2465 brelse(obp, 0); 2466 } 2467 } 2468 2469 /* If we are expanding, write the new empty SEGUSE entries */ 2470 if (newnsegs > oldnsegs) { 2471 for (i = oldnsegs; i < newnsegs; i++) { 2472 if ((error = bread(ivp, i / lfs_sb_getsepb(fs) + 2473 lfs_sb_getcleansz(fs), lfs_sb_getbsize(fs), 2474 B_MODIFY, &bp)) != 0) 2475 panic("lfs: ifile read: %d", error); 2476 while ((i + 1) % lfs_sb_getsepb(fs) && i < newnsegs) { 2477 sup = &((SEGUSE *)bp->b_data)[i % lfs_sb_getsepb(fs)]; 2478 memset(sup, 0, sizeof(*sup)); 2479 i++; 2480 } 2481 VOP_BWRITE(bp->b_vp, bp); 2482 } 2483 } 2484 2485 /* Zero out unused superblock offsets */ 2486 for (i = 2; i < LFS_MAXNUMSB; i++) 2487 if (lfs_dtosn(fs, lfs_sb_getsboff(fs, i)) >= newnsegs) 2488 lfs_sb_setsboff(fs, i, 0x0); 2489 2490 /* 2491 * Correct superblock entries that depend on fs size. 2492 * The computations of these are as follows: 2493 * 2494 * size = lfs_segtod(fs, nseg) 2495 * dsize = lfs_segtod(fs, nseg - minfreeseg) - lfs_btofsb(#super * LFS_SBPAD) 2496 * bfree = dsize - lfs_btofsb(fs, bsize * nseg / 2) - blocks_actually_used 2497 * avail = lfs_segtod(fs, nclean) - lfs_btofsb(#clean_super * LFS_SBPAD) 2498 * + (lfs_segtod(fs, 1) - (offset - curseg)) 2499 * - lfs_segtod(fs, minfreeseg - (minfreeseg / 2)) 2500 * 2501 * XXX - we should probably adjust minfreeseg as well. 2502 */ 2503 gain = (newnsegs - oldnsegs); 2504 lfs_sb_setnseg(fs, newnsegs); 2505 lfs_sb_setsegtabsz(fs, nlast - lfs_sb_getcleansz(fs)); 2506 lfs_sb_addsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); 2507 lfs_sb_adddsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes)); 2508 lfs_sb_addbfree(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes) 2509 - gain * lfs_btofsb(fs, lfs_sb_getbsize(fs) / 2)); 2510 if (gain > 0) { 2511 lfs_sb_addnclean(fs, gain); 2512 lfs_sb_addavail(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); 2513 } else { 2514 lfs_sb_subnclean(fs, cgain); 2515 lfs_sb_subavail(fs, cgain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - 2516 lfs_btofsb(fs, csbbytes)); 2517 } 2518 2519 /* Resize segment flag cache */ 2520 fs->lfs_suflags[0] = realloc(fs->lfs_suflags[0], 2521 lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2522 fs->lfs_suflags[1] = realloc(fs->lfs_suflags[1], 2523 lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); 2524 for (i = oldnsegs; i < newnsegs; i++) 2525 fs->lfs_suflags[0][i] = fs->lfs_suflags[1][i] = 0x0; 2526 2527 /* Truncate Ifile if necessary */ 2528 if (noff < 0) 2529 lfs_truncate(ivp, ivp->v_size + (noff << lfs_sb_getbshift(fs)), 0, 2530 NOCRED); 2531 2532 /* Update cleaner info so the cleaner can die */ 2533 /* XXX what to do if bread fails? */ 2534 bread(ivp, 0, lfs_sb_getbsize(fs), B_MODIFY, &bp); 2535 cip = bp->b_data; 2536 lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); 2537 lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); 2538 VOP_BWRITE(bp->b_vp, bp); 2539 2540 /* Let Ifile accesses proceed */ 2541 rw_exit(&fs->lfs_iflock); 2542 2543 out: 2544 lfs_segunlock(fs); 2545 return error; 2546 } 2547 2548 /* 2549 * Extended attribute dispatch 2550 */ 2551 int 2552 lfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2553 int attrnamespace, const char *attrname) 2554 { 2555 #ifdef LFS_EXTATTR 2556 struct ulfsmount *ump; 2557 2558 ump = VFSTOULFS(mp); 2559 if (ump->um_fstype == ULFS1) { 2560 return ulfs_extattrctl(mp, cmd, vp, attrnamespace, attrname); 2561 } 2562 #endif 2563 return vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname); 2564 } 2565