1 /* 2 * Copyright (c) 2011-2015 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * by Daniel Flores (GSOC 2013 - mentored by Matthew Dillon, compression) 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/nlookup.h> 39 #include <sys/vnode.h> 40 #include <sys/mount.h> 41 #include <sys/fcntl.h> 42 #include <sys/buf.h> 43 #include <sys/uuid.h> 44 #include <sys/vfsops.h> 45 #include <sys/sysctl.h> 46 #include <sys/socket.h> 47 #include <sys/objcache.h> 48 49 #include <sys/proc.h> 50 #include <sys/namei.h> 51 #include <sys/mountctl.h> 52 #include <sys/dirent.h> 53 #include <sys/uio.h> 54 55 #include <sys/mutex.h> 56 #include <sys/mutex2.h> 57 58 #include "hammer2.h" 59 #include "hammer2_disk.h" 60 #include "hammer2_mount.h" 61 #include "hammer2_lz4.h" 62 63 #include "zlib/hammer2_zlib.h" 64 65 #define REPORT_REFS_ERRORS 1 /* XXX remove me */ 66 67 MALLOC_DEFINE(M_OBJCACHE, "objcache", "Object Cache"); 68 69 struct hammer2_sync_info { 70 int error; 71 int waitfor; 72 }; 73 74 TAILQ_HEAD(hammer2_mntlist, hammer2_dev); 75 TAILQ_HEAD(hammer2_pfslist, hammer2_pfs); 76 static struct hammer2_mntlist hammer2_mntlist; 77 static struct hammer2_pfslist hammer2_pfslist; 78 static struct lock hammer2_mntlk; 79 80 int hammer2_debug; 81 int hammer2_cluster_read = 4; /* physical read-ahead */ 82 int hammer2_cluster_write = 0; /* bdwrite() so later inval works */ 83 int hammer2_dedup_enable = 1; 84 int hammer2_inval_enable = 0; 85 int hammer2_flush_pipe = 100; 86 int hammer2_synchronous_flush = 1; 87 int hammer2_dio_count; 88 long hammer2_chain_allocs; 89 long hammer2_chain_frees; 90 long hammer2_limit_dirty_chains; 91 long hammer2_count_modified_chains; 92 long hammer2_iod_invals; 93 long hammer2_iod_file_read; 94 long hammer2_iod_meta_read; 95 long hammer2_iod_indr_read; 96 long hammer2_iod_fmap_read; 97 long hammer2_iod_volu_read; 98 long hammer2_iod_file_write; 99 long hammer2_iod_file_wembed; 100 long hammer2_iod_file_wzero; 101 long hammer2_iod_file_wdedup; 102 long hammer2_iod_meta_write; 103 long hammer2_iod_indr_write; 104 long hammer2_iod_fmap_write; 105 long hammer2_iod_volu_write; 106 107 MALLOC_DECLARE(M_HAMMER2_CBUFFER); 108 MALLOC_DEFINE(M_HAMMER2_CBUFFER, "HAMMER2-compbuffer", 109 "Buffer used for compression."); 110 111 MALLOC_DECLARE(M_HAMMER2_DEBUFFER); 112 MALLOC_DEFINE(M_HAMMER2_DEBUFFER, "HAMMER2-decompbuffer", 113 "Buffer used for decompression."); 114 115 SYSCTL_NODE(_vfs, OID_AUTO, hammer2, CTLFLAG_RW, 0, "HAMMER2 filesystem"); 116 117 SYSCTL_INT(_vfs_hammer2, OID_AUTO, debug, CTLFLAG_RW, 118 &hammer2_debug, 0, ""); 119 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_read, CTLFLAG_RW, 120 &hammer2_cluster_read, 0, ""); 121 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_write, CTLFLAG_RW, 122 &hammer2_cluster_write, 0, ""); 123 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dedup_enable, CTLFLAG_RW, 124 &hammer2_dedup_enable, 0, ""); 125 SYSCTL_INT(_vfs_hammer2, OID_AUTO, inval_enable, CTLFLAG_RW, 126 &hammer2_inval_enable, 0, ""); 127 SYSCTL_INT(_vfs_hammer2, OID_AUTO, flush_pipe, CTLFLAG_RW, 128 &hammer2_flush_pipe, 0, ""); 129 SYSCTL_INT(_vfs_hammer2, OID_AUTO, synchronous_flush, CTLFLAG_RW, 130 &hammer2_synchronous_flush, 0, ""); 131 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_allocs, CTLFLAG_RW, 132 &hammer2_chain_allocs, 0, ""); 133 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_frees, CTLFLAG_RW, 134 &hammer2_chain_frees, 0, ""); 135 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, limit_dirty_chains, CTLFLAG_RW, 136 &hammer2_limit_dirty_chains, 0, ""); 137 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, count_modified_chains, CTLFLAG_RW, 138 &hammer2_count_modified_chains, 0, ""); 139 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dio_count, CTLFLAG_RD, 140 &hammer2_dio_count, 0, ""); 141 142 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_invals, CTLFLAG_RW, 143 &hammer2_iod_invals, 0, ""); 144 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_read, CTLFLAG_RW, 145 &hammer2_iod_file_read, 0, ""); 146 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_read, CTLFLAG_RW, 147 &hammer2_iod_meta_read, 0, ""); 148 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_read, CTLFLAG_RW, 149 &hammer2_iod_indr_read, 0, ""); 150 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_read, CTLFLAG_RW, 151 &hammer2_iod_fmap_read, 0, ""); 152 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_read, CTLFLAG_RW, 153 &hammer2_iod_volu_read, 0, ""); 154 155 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_write, CTLFLAG_RW, 156 &hammer2_iod_file_write, 0, ""); 157 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wembed, CTLFLAG_RW, 158 &hammer2_iod_file_wembed, 0, ""); 159 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wzero, CTLFLAG_RW, 160 &hammer2_iod_file_wzero, 0, ""); 161 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wdedup, CTLFLAG_RW, 162 &hammer2_iod_file_wdedup, 0, ""); 163 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_write, CTLFLAG_RW, 164 &hammer2_iod_meta_write, 0, ""); 165 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_write, CTLFLAG_RW, 166 &hammer2_iod_indr_write, 0, ""); 167 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_write, CTLFLAG_RW, 168 &hammer2_iod_fmap_write, 0, ""); 169 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_write, CTLFLAG_RW, 170 &hammer2_iod_volu_write, 0, ""); 171 172 long hammer2_check_icrc32; 173 long hammer2_check_xxhash64; 174 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_icrc32, CTLFLAG_RW, 175 &hammer2_check_icrc32, 0, ""); 176 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_xxhash64, CTLFLAG_RW, 177 &hammer2_check_xxhash64, 0, ""); 178 179 static int hammer2_vfs_init(struct vfsconf *conf); 180 static int hammer2_vfs_uninit(struct vfsconf *vfsp); 181 static int hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data, 182 struct ucred *cred); 183 static int hammer2_remount(hammer2_dev_t *, struct mount *, char *, 184 struct vnode *, struct ucred *); 185 static int hammer2_recovery(hammer2_dev_t *hmp); 186 static int hammer2_vfs_unmount(struct mount *mp, int mntflags); 187 static int hammer2_vfs_root(struct mount *mp, struct vnode **vpp); 188 static int hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, 189 struct ucred *cred); 190 static int hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, 191 struct ucred *cred); 192 static int hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 193 struct fid *fhp, struct vnode **vpp); 194 static int hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp); 195 static int hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 196 int *exflagsp, struct ucred **credanonp); 197 198 static int hammer2_install_volume_header(hammer2_dev_t *hmp); 199 static int hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data); 200 201 static void hammer2_update_pmps(hammer2_dev_t *hmp); 202 203 static void hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp); 204 static void hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp, 205 hammer2_dev_t *hmp); 206 207 /* 208 * HAMMER2 vfs operations. 209 */ 210 static struct vfsops hammer2_vfsops = { 211 .vfs_init = hammer2_vfs_init, 212 .vfs_uninit = hammer2_vfs_uninit, 213 .vfs_sync = hammer2_vfs_sync, 214 .vfs_mount = hammer2_vfs_mount, 215 .vfs_unmount = hammer2_vfs_unmount, 216 .vfs_root = hammer2_vfs_root, 217 .vfs_statfs = hammer2_vfs_statfs, 218 .vfs_statvfs = hammer2_vfs_statvfs, 219 .vfs_vget = hammer2_vfs_vget, 220 .vfs_vptofh = hammer2_vfs_vptofh, 221 .vfs_fhtovp = hammer2_vfs_fhtovp, 222 .vfs_checkexp = hammer2_vfs_checkexp 223 }; 224 225 MALLOC_DEFINE(M_HAMMER2, "HAMMER2-mount", ""); 226 227 VFS_SET(hammer2_vfsops, hammer2, 0); 228 MODULE_VERSION(hammer2, 1); 229 230 static 231 int 232 hammer2_vfs_init(struct vfsconf *conf) 233 { 234 static struct objcache_malloc_args margs_read; 235 static struct objcache_malloc_args margs_write; 236 static struct objcache_malloc_args margs_vop; 237 238 int error; 239 240 error = 0; 241 242 if (HAMMER2_BLOCKREF_BYTES != sizeof(struct hammer2_blockref)) 243 error = EINVAL; 244 if (HAMMER2_INODE_BYTES != sizeof(struct hammer2_inode_data)) 245 error = EINVAL; 246 if (HAMMER2_VOLUME_BYTES != sizeof(struct hammer2_volume_data)) 247 error = EINVAL; 248 249 if (error) 250 kprintf("HAMMER2 structure size mismatch; cannot continue.\n"); 251 252 margs_read.objsize = 65536; 253 margs_read.mtype = M_HAMMER2_DEBUFFER; 254 255 margs_write.objsize = 32768; 256 margs_write.mtype = M_HAMMER2_CBUFFER; 257 258 margs_vop.objsize = sizeof(hammer2_xop_t); 259 margs_vop.mtype = M_HAMMER2; 260 261 /* 262 * Note thaht for the XOPS cache we want backing store allocations 263 * to use M_ZERO. This is not allowed in objcache_get() (to avoid 264 * confusion), so use the backing store function that does it. This 265 * means that initial XOPS objects are zerod but REUSED objects are 266 * not. So we are responsible for cleaning the object up sufficiently 267 * for our needs before objcache_put()ing it back (typically just the 268 * FIFO indices). 269 */ 270 cache_buffer_read = objcache_create(margs_read.mtype->ks_shortdesc, 271 0, 1, NULL, NULL, NULL, 272 objcache_malloc_alloc, 273 objcache_malloc_free, 274 &margs_read); 275 cache_buffer_write = objcache_create(margs_write.mtype->ks_shortdesc, 276 0, 1, NULL, NULL, NULL, 277 objcache_malloc_alloc, 278 objcache_malloc_free, 279 &margs_write); 280 cache_xops = objcache_create(margs_vop.mtype->ks_shortdesc, 281 0, 1, NULL, NULL, NULL, 282 objcache_malloc_alloc_zero, 283 objcache_malloc_free, 284 &margs_vop); 285 286 287 lockinit(&hammer2_mntlk, "mntlk", 0, 0); 288 TAILQ_INIT(&hammer2_mntlist); 289 TAILQ_INIT(&hammer2_pfslist); 290 291 hammer2_limit_dirty_chains = maxvnodes / 10; 292 if (hammer2_limit_dirty_chains > HAMMER2_LIMIT_DIRTY_CHAINS) 293 hammer2_limit_dirty_chains = HAMMER2_LIMIT_DIRTY_CHAINS; 294 295 return (error); 296 } 297 298 static 299 int 300 hammer2_vfs_uninit(struct vfsconf *vfsp __unused) 301 { 302 objcache_destroy(cache_buffer_read); 303 objcache_destroy(cache_buffer_write); 304 objcache_destroy(cache_xops); 305 return 0; 306 } 307 308 /* 309 * Core PFS allocator. Used to allocate the pmp structure for PFS cluster 310 * mounts and the spmp structure for media (hmp) structures. 311 * 312 * pmp->modify_tid tracks new modify_tid transaction ids for front-end 313 * transactions. Note that synchronization does not use this field. 314 * (typically frontend operations and synchronization cannot run on the 315 * same PFS node at the same time). 316 * 317 * XXX check locking 318 */ 319 hammer2_pfs_t * 320 hammer2_pfsalloc(hammer2_chain_t *chain, const hammer2_inode_data_t *ripdata, 321 hammer2_tid_t modify_tid, hammer2_dev_t *force_local) 322 { 323 hammer2_inode_t *iroot; 324 hammer2_pfs_t *pmp; 325 int count; 326 int i; 327 int j; 328 329 /* 330 * Locate or create the PFS based on the cluster id. If ripdata 331 * is NULL this is a spmp which is unique and is always allocated. 332 * 333 * If the device is mounted in local mode all PFSs are considered 334 * independent and not part of any cluster (for debugging only). 335 */ 336 if (ripdata) { 337 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) { 338 if (force_local != pmp->force_local) 339 continue; 340 if (force_local == NULL && 341 bcmp(&pmp->pfs_clid, &ripdata->meta.pfs_clid, 342 sizeof(pmp->pfs_clid)) == 0) { 343 break; 344 } else if (force_local && pmp->pfs_names[0] && 345 strcmp(pmp->pfs_names[0], ripdata->filename) == 0) { 346 break; 347 } 348 } 349 } else { 350 pmp = NULL; 351 } 352 353 if (pmp == NULL) { 354 pmp = kmalloc(sizeof(*pmp), M_HAMMER2, M_WAITOK | M_ZERO); 355 pmp->force_local = force_local; 356 hammer2_trans_manage_init(pmp); 357 kmalloc_create(&pmp->minode, "HAMMER2-inodes"); 358 kmalloc_create(&pmp->mmsg, "HAMMER2-pfsmsg"); 359 lockinit(&pmp->lock, "pfslk", 0, 0); 360 lockinit(&pmp->lock_nlink, "h2nlink", 0, 0); 361 spin_init(&pmp->inum_spin, "hm2pfsalloc_inum"); 362 spin_init(&pmp->xop_spin, "h2xop"); 363 spin_init(&pmp->lru_spin, "h2lru"); 364 RB_INIT(&pmp->inum_tree); 365 TAILQ_INIT(&pmp->sideq); 366 TAILQ_INIT(&pmp->lru_list); 367 spin_init(&pmp->list_spin, "hm2pfsalloc_list"); 368 369 /* 370 * Distribute backend operations to threads 371 */ 372 for (i = 0; i < HAMMER2_XOPGROUPS; ++i) 373 hammer2_xop_group_init(pmp, &pmp->xop_groups[i]); 374 375 /* 376 * Save the last media transaction id for the flusher. Set 377 * initial 378 */ 379 if (ripdata) 380 pmp->pfs_clid = ripdata->meta.pfs_clid; 381 TAILQ_INSERT_TAIL(&hammer2_pfslist, pmp, mntentry); 382 383 /* 384 * The synchronization thread may start too early, make 385 * sure it stays frozen until we are ready to let it go. 386 * XXX 387 */ 388 /* 389 pmp->primary_thr.flags = HAMMER2_THREAD_FROZEN | 390 HAMMER2_THREAD_REMASTER; 391 */ 392 } 393 394 /* 395 * Create the PFS's root inode. 396 */ 397 if ((iroot = pmp->iroot) == NULL) { 398 iroot = hammer2_inode_get(pmp, NULL, NULL, -1); 399 pmp->iroot = iroot; 400 hammer2_inode_ref(iroot); 401 hammer2_inode_unlock(iroot); 402 } 403 404 /* 405 * Stop here if no chain is passed in. 406 */ 407 if (chain == NULL) 408 goto done; 409 410 /* 411 * When a chain is passed in we must add it to the PFS's root 412 * inode, update pmp->pfs_types[], and update the syncronization 413 * threads. 414 * 415 * When forcing local mode, mark the PFS as a MASTER regardless. 416 * 417 * At the moment empty spots can develop due to removals or failures. 418 * Ultimately we want to re-fill these spots but doing so might 419 * confused running code. XXX 420 */ 421 hammer2_inode_ref(iroot); 422 hammer2_mtx_ex(&iroot->lock); 423 j = iroot->cluster.nchains; 424 425 kprintf("add PFS to pmp %p[%d]\n", pmp, j); 426 427 if (j == HAMMER2_MAXCLUSTER) { 428 kprintf("hammer2_mount: cluster full!\n"); 429 /* XXX fatal error? */ 430 } else { 431 KKASSERT(chain->pmp == NULL); 432 chain->pmp = pmp; 433 hammer2_chain_ref(chain); 434 iroot->cluster.array[j].chain = chain; 435 if (force_local) 436 pmp->pfs_types[j] = HAMMER2_PFSTYPE_MASTER; 437 else 438 pmp->pfs_types[j] = ripdata->meta.pfs_type; 439 pmp->pfs_names[j] = kstrdup(ripdata->filename, M_HAMMER2); 440 pmp->pfs_hmps[j] = chain->hmp; 441 442 /* 443 * If the PFS is already mounted we must account 444 * for the mount_count here. 445 */ 446 if (pmp->mp) 447 ++chain->hmp->mount_count; 448 449 /* 450 * May have to fixup dirty chain tracking. Previous 451 * pmp was NULL so nothing to undo. 452 */ 453 if (chain->flags & HAMMER2_CHAIN_MODIFIED) 454 hammer2_pfs_memory_inc(pmp); 455 ++j; 456 } 457 iroot->cluster.nchains = j; 458 459 /* 460 * Update nmasters from any PFS inode which is part of the cluster. 461 * It is possible that this will result in a value which is too 462 * high. MASTER PFSs are authoritative for pfs_nmasters and will 463 * override this value later on. 464 * 465 * (This informs us of masters that might not currently be 466 * discoverable by this mount). 467 */ 468 if (ripdata && pmp->pfs_nmasters < ripdata->meta.pfs_nmasters) { 469 pmp->pfs_nmasters = ripdata->meta.pfs_nmasters; 470 } 471 472 /* 473 * Count visible masters. Masters are usually added with 474 * ripdata->meta.pfs_nmasters set to 1. This detects when there 475 * are more (XXX and must update the master inodes). 476 */ 477 count = 0; 478 for (i = 0; i < iroot->cluster.nchains; ++i) { 479 if (pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) 480 ++count; 481 } 482 if (pmp->pfs_nmasters < count) 483 pmp->pfs_nmasters = count; 484 485 /* 486 * Create missing synchronization and support threads. 487 * 488 * Single-node masters (including snapshots) have nothing to 489 * synchronize and do not require this thread. 490 * 491 * Multi-node masters or any number of soft masters, slaves, copy, 492 * or other PFS types need the thread. 493 * 494 * Each thread is responsible for its particular cluster index. 495 * We use independent threads so stalls or mismatches related to 496 * any given target do not affect other targets. 497 */ 498 for (i = 0; i < iroot->cluster.nchains; ++i) { 499 /* 500 * Single-node masters (including snapshots) have nothing 501 * to synchronize and will make direct xops support calls, 502 * thus they do not require this thread. 503 * 504 * Note that there can be thousands of snapshots. We do not 505 * want to create thousands of threads. 506 */ 507 if (pmp->pfs_nmasters <= 1 && 508 pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) { 509 continue; 510 } 511 512 /* 513 * Sync support thread 514 */ 515 if (pmp->sync_thrs[i].td == NULL) { 516 hammer2_thr_create(&pmp->sync_thrs[i], pmp, 517 "h2nod", i, -1, 518 hammer2_primary_sync_thread); 519 } 520 } 521 522 /* 523 * Create missing Xop threads 524 */ 525 if (pmp->mp) 526 hammer2_xop_helper_create(pmp); 527 528 hammer2_mtx_unlock(&iroot->lock); 529 hammer2_inode_drop(iroot); 530 done: 531 return pmp; 532 } 533 534 /* 535 * Destroy a PFS, typically only occurs after the last mount on a device 536 * has gone away. 537 */ 538 static void 539 hammer2_pfsfree(hammer2_pfs_t *pmp) 540 { 541 hammer2_inode_t *iroot; 542 hammer2_chain_t *chain; 543 int i; 544 int j; 545 546 /* 547 * Cleanup our reference on iroot. iroot is (should) not be needed 548 * by the flush code. 549 */ 550 TAILQ_REMOVE(&hammer2_pfslist, pmp, mntentry); 551 552 iroot = pmp->iroot; 553 if (iroot) { 554 for (i = 0; i < iroot->cluster.nchains; ++i) { 555 hammer2_thr_delete(&pmp->sync_thrs[i]); 556 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) 557 hammer2_thr_delete(&pmp->xop_groups[j].thrs[i]); 558 } 559 #if REPORT_REFS_ERRORS 560 if (pmp->iroot->refs != 1) 561 kprintf("PMP->IROOT %p REFS WRONG %d\n", 562 pmp->iroot, pmp->iroot->refs); 563 #else 564 KKASSERT(pmp->iroot->refs == 1); 565 #endif 566 /* ref for pmp->iroot */ 567 hammer2_inode_drop(pmp->iroot); 568 pmp->iroot = NULL; 569 } 570 571 /* 572 * Cleanup chains remaining on LRU list. 573 */ 574 kprintf("pfsfree: %p lrucount=%d\n", pmp, pmp->lru_count); 575 while ((chain = TAILQ_FIRST(&pmp->lru_list)) != NULL) { 576 hammer2_chain_ref(chain); 577 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE); 578 hammer2_chain_drop(chain); 579 } 580 581 /* 582 * Free remaining pmp resources 583 */ 584 kmalloc_destroy(&pmp->mmsg); 585 kmalloc_destroy(&pmp->minode); 586 587 kfree(pmp, M_HAMMER2); 588 } 589 590 /* 591 * Remove all references to hmp from the pfs list. Any PFS which becomes 592 * empty is terminated and freed. 593 * 594 * XXX inefficient. 595 */ 596 static void 597 hammer2_pfsfree_scan(hammer2_dev_t *hmp) 598 { 599 hammer2_pfs_t *pmp; 600 hammer2_inode_t *iroot; 601 hammer2_chain_t *rchain; 602 int didfreeze; 603 int i; 604 int j; 605 606 again: 607 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) { 608 if ((iroot = pmp->iroot) == NULL) 609 continue; 610 if (hmp->spmp == pmp) { 611 kprintf("unmount hmp %p remove spmp %p\n", 612 hmp, pmp); 613 hmp->spmp = NULL; 614 } 615 616 /* 617 * Determine if this PFS is affected. If it is we must 618 * freeze all management threads and lock its iroot. 619 * 620 * Freezing a management thread forces it idle, operations 621 * in-progress will be aborted and it will have to start 622 * over again when unfrozen, or exit if told to exit. 623 */ 624 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 625 if (pmp->pfs_hmps[i] == hmp) 626 break; 627 } 628 if (i != HAMMER2_MAXCLUSTER) { 629 /* 630 * Make sure all synchronization threads are locked 631 * down. 632 */ 633 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 634 if (pmp->pfs_hmps[i] == NULL) 635 continue; 636 hammer2_thr_freeze_async(&pmp->sync_thrs[i]); 637 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) { 638 hammer2_thr_freeze_async( 639 &pmp->xop_groups[j].thrs[i]); 640 } 641 } 642 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 643 if (pmp->pfs_hmps[i] == NULL) 644 continue; 645 hammer2_thr_freeze(&pmp->sync_thrs[i]); 646 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) { 647 hammer2_thr_freeze( 648 &pmp->xop_groups[j].thrs[i]); 649 } 650 } 651 652 /* 653 * Lock the inode and clean out matching chains. 654 * Note that we cannot use hammer2_inode_lock_*() 655 * here because that would attempt to validate the 656 * cluster that we are in the middle of ripping 657 * apart. 658 * 659 * WARNING! We are working directly on the inodes 660 * embedded cluster. 661 */ 662 hammer2_mtx_ex(&iroot->lock); 663 664 /* 665 * Remove the chain from matching elements of the PFS. 666 */ 667 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 668 if (pmp->pfs_hmps[i] != hmp) 669 continue; 670 hammer2_thr_delete(&pmp->sync_thrs[i]); 671 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) { 672 hammer2_thr_delete( 673 &pmp->xop_groups[j].thrs[i]); 674 } 675 rchain = iroot->cluster.array[i].chain; 676 iroot->cluster.array[i].chain = NULL; 677 pmp->pfs_types[i] = 0; 678 if (pmp->pfs_names[i]) { 679 kfree(pmp->pfs_names[i], M_HAMMER2); 680 pmp->pfs_names[i] = NULL; 681 } 682 if (rchain) { 683 hammer2_chain_drop(rchain); 684 /* focus hint */ 685 if (iroot->cluster.focus == rchain) 686 iroot->cluster.focus = NULL; 687 } 688 pmp->pfs_hmps[i] = NULL; 689 } 690 hammer2_mtx_unlock(&iroot->lock); 691 didfreeze = 1; /* remaster, unfreeze down below */ 692 } else { 693 didfreeze = 0; 694 } 695 696 /* 697 * Cleanup trailing chains. Gaps may remain. 698 */ 699 for (i = HAMMER2_MAXCLUSTER - 1; i >= 0; --i) { 700 if (pmp->pfs_hmps[i]) 701 break; 702 } 703 iroot->cluster.nchains = i + 1; 704 705 /* 706 * If the PMP has no elements remaining we can destroy it. 707 * (this will transition management threads from frozen->exit). 708 */ 709 if (iroot->cluster.nchains == 0) { 710 kprintf("unmount hmp %p last ref to PMP=%p\n", 711 hmp, pmp); 712 hammer2_pfsfree(pmp); 713 goto again; 714 } 715 716 /* 717 * If elements still remain we need to set the REMASTER 718 * flag and unfreeze it. 719 */ 720 if (didfreeze) { 721 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 722 if (pmp->pfs_hmps[i] == NULL) 723 continue; 724 hammer2_thr_remaster(&pmp->sync_thrs[i]); 725 hammer2_thr_unfreeze(&pmp->sync_thrs[i]); 726 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) { 727 hammer2_thr_remaster( 728 &pmp->xop_groups[j].thrs[i]); 729 hammer2_thr_unfreeze( 730 &pmp->xop_groups[j].thrs[i]); 731 } 732 } 733 } 734 } 735 } 736 737 /* 738 * Mount or remount HAMMER2 fileystem from physical media 739 * 740 * mountroot 741 * mp mount point structure 742 * path NULL 743 * data <unused> 744 * cred <unused> 745 * 746 * mount 747 * mp mount point structure 748 * path path to mount point 749 * data pointer to argument structure in user space 750 * volume volume path (device@LABEL form) 751 * hflags user mount flags 752 * cred user credentials 753 * 754 * RETURNS: 0 Success 755 * !0 error number 756 */ 757 static 758 int 759 hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data, 760 struct ucred *cred) 761 { 762 struct hammer2_mount_info info; 763 hammer2_pfs_t *pmp; 764 hammer2_pfs_t *spmp; 765 hammer2_dev_t *hmp; 766 hammer2_dev_t *force_local; 767 hammer2_key_t key_next; 768 hammer2_key_t key_dummy; 769 hammer2_key_t lhc; 770 struct vnode *devvp; 771 struct nlookupdata nd; 772 hammer2_chain_t *parent; 773 hammer2_chain_t *chain; 774 hammer2_cluster_t *cluster; 775 const hammer2_inode_data_t *ripdata; 776 hammer2_blockref_t bref; 777 struct file *fp; 778 char devstr[MNAMELEN]; 779 size_t size; 780 size_t done; 781 char *dev; 782 char *label; 783 int ronly = 1; 784 int error; 785 int cache_index; 786 int i; 787 788 hmp = NULL; 789 pmp = NULL; 790 dev = NULL; 791 label = NULL; 792 devvp = NULL; 793 cache_index = -1; 794 795 kprintf("hammer2_mount\n"); 796 797 if (path == NULL) { 798 /* 799 * Root mount 800 */ 801 bzero(&info, sizeof(info)); 802 info.cluster_fd = -1; 803 ksnprintf(devstr, sizeof(devstr), "%s", 804 mp->mnt_stat.f_mntfromname); 805 kprintf("hammer2_mount: root '%s'\n", devstr); 806 } else { 807 /* 808 * Non-root mount or updating a mount 809 */ 810 error = copyin(data, &info, sizeof(info)); 811 if (error) 812 return (error); 813 814 error = copyinstr(info.volume, devstr, MNAMELEN - 1, &done); 815 if (error) 816 return (error); 817 } 818 819 /* Extract device and label */ 820 dev = devstr; 821 label = strchr(devstr, '@'); 822 if (label == NULL || 823 ((label + 1) - dev) > done) { 824 return (EINVAL); 825 } 826 *label = '\0'; 827 label++; 828 if (*label == '\0') 829 return (EINVAL); 830 831 if (mp->mnt_flag & MNT_UPDATE) { 832 /* 833 * Update mount. Note that pmp->iroot->cluster is 834 * an inode-embedded cluster and thus cannot be 835 * directly locked. 836 * 837 * XXX HAMMER2 needs to implement NFS export via 838 * mountctl. 839 */ 840 pmp = MPTOPMP(mp); 841 pmp->hflags = info.hflags; 842 cluster = &pmp->iroot->cluster; 843 for (i = 0; i < cluster->nchains; ++i) { 844 if (cluster->array[i].chain == NULL) 845 continue; 846 hmp = cluster->array[i].chain->hmp; 847 devvp = hmp->devvp; 848 error = hammer2_remount(hmp, mp, path, 849 devvp, cred); 850 if (error) 851 break; 852 } 853 854 return error; 855 } 856 857 /* 858 * HMP device mount 859 * 860 * Lookup name and verify it refers to a block device. 861 */ 862 if (path) { 863 error = nlookup_init(&nd, dev, UIO_SYSSPACE, NLC_FOLLOW); 864 if (error == 0) 865 error = nlookup(&nd); 866 if (error == 0) 867 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); 868 nlookup_done(&nd); 869 } else { 870 /* root mount */ 871 cdev_t cdev = kgetdiskbyname(dev); 872 error = bdevvp(cdev, &devvp); 873 if (error) 874 kprintf("hammer2: cannot find '%s'\n", dev); 875 } 876 877 if (error == 0) { 878 if (vn_isdisk(devvp, &error)) 879 error = vfs_mountedon(devvp); 880 } 881 882 /* 883 * Determine if the device has already been mounted. After this 884 * check hmp will be non-NULL if we are doing the second or more 885 * hammer2 mounts from the same device. 886 */ 887 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 888 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) { 889 if (hmp->devvp == devvp) 890 break; 891 } 892 893 /* 894 * Open the device if this isn't a secondary mount and construct 895 * the H2 device mount (hmp). 896 */ 897 if (hmp == NULL) { 898 hammer2_chain_t *schain; 899 hammer2_xid_t xid; 900 901 if (error == 0 && vcount(devvp) > 0) 902 error = EBUSY; 903 904 /* 905 * Now open the device 906 */ 907 if (error == 0) { 908 ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 909 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 910 error = vinvalbuf(devvp, V_SAVE, 0, 0); 911 if (error == 0) { 912 error = VOP_OPEN(devvp, 913 ronly ? FREAD : FREAD | FWRITE, 914 FSCRED, NULL); 915 } 916 vn_unlock(devvp); 917 } 918 if (error && devvp) { 919 vrele(devvp); 920 devvp = NULL; 921 } 922 if (error) { 923 lockmgr(&hammer2_mntlk, LK_RELEASE); 924 return error; 925 } 926 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO); 927 ksnprintf(hmp->devrepname, sizeof(hmp->devrepname), "%s", dev); 928 hmp->ronly = ronly; 929 hmp->devvp = devvp; 930 hmp->hflags = info.hflags & HMNT2_DEVFLAGS; 931 kmalloc_create(&hmp->mchain, "HAMMER2-chains"); 932 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry); 933 RB_INIT(&hmp->iotree); 934 spin_init(&hmp->io_spin, "hm2mount_io"); 935 spin_init(&hmp->list_spin, "hm2mount_list"); 936 TAILQ_INIT(&hmp->flushq); 937 938 lockinit(&hmp->vollk, "h2vol", 0, 0); 939 lockinit(&hmp->bulklk, "h2bulk", 0, 0); 940 941 /* 942 * vchain setup. vchain.data is embedded. 943 * vchain.refs is initialized and will never drop to 0. 944 * 945 * NOTE! voldata is not yet loaded. 946 */ 947 hmp->vchain.hmp = hmp; 948 hmp->vchain.refs = 1; 949 hmp->vchain.data = (void *)&hmp->voldata; 950 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME; 951 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX; 952 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid; 953 954 hammer2_chain_core_init(&hmp->vchain); 955 /* hmp->vchain.u.xxx is left NULL */ 956 957 /* 958 * fchain setup. fchain.data is embedded. 959 * fchain.refs is initialized and will never drop to 0. 960 * 961 * The data is not used but needs to be initialized to 962 * pass assertion muster. We use this chain primarily 963 * as a placeholder for the freemap's top-level RBTREE 964 * so it does not interfere with the volume's topology 965 * RBTREE. 966 */ 967 hmp->fchain.hmp = hmp; 968 hmp->fchain.refs = 1; 969 hmp->fchain.data = (void *)&hmp->voldata.freemap_blockset; 970 hmp->fchain.bref.type = HAMMER2_BREF_TYPE_FREEMAP; 971 hmp->fchain.bref.data_off = 0 | HAMMER2_PBUFRADIX; 972 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid; 973 hmp->fchain.bref.methods = 974 HAMMER2_ENC_CHECK(HAMMER2_CHECK_FREEMAP) | 975 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE); 976 977 hammer2_chain_core_init(&hmp->fchain); 978 /* hmp->fchain.u.xxx is left NULL */ 979 980 /* 981 * Install the volume header and initialize fields from 982 * voldata. 983 */ 984 error = hammer2_install_volume_header(hmp); 985 if (error) { 986 hammer2_unmount_helper(mp, NULL, hmp); 987 lockmgr(&hammer2_mntlk, LK_RELEASE); 988 hammer2_vfs_unmount(mp, MNT_FORCE); 989 return error; 990 } 991 992 /* 993 * Really important to get these right or flush will get 994 * confused. 995 */ 996 hmp->spmp = hammer2_pfsalloc(NULL, NULL, 0, NULL); 997 kprintf("alloc spmp %p tid %016jx\n", 998 hmp->spmp, hmp->voldata.mirror_tid); 999 spmp = hmp->spmp; 1000 1001 /* 1002 * Dummy-up vchain and fchain's modify_tid. mirror_tid 1003 * is inherited from the volume header. 1004 */ 1005 xid = 0; 1006 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid; 1007 hmp->vchain.bref.modify_tid = hmp->vchain.bref.mirror_tid; 1008 hmp->vchain.pmp = spmp; 1009 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid; 1010 hmp->fchain.bref.modify_tid = hmp->fchain.bref.mirror_tid; 1011 hmp->fchain.pmp = spmp; 1012 1013 /* 1014 * First locate the super-root inode, which is key 0 1015 * relative to the volume header's blockset. 1016 * 1017 * Then locate the root inode by scanning the directory keyspace 1018 * represented by the label. 1019 */ 1020 parent = hammer2_chain_lookup_init(&hmp->vchain, 0); 1021 schain = hammer2_chain_lookup(&parent, &key_dummy, 1022 HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY, 1023 &cache_index, 0); 1024 hammer2_chain_lookup_done(parent); 1025 if (schain == NULL) { 1026 kprintf("hammer2_mount: invalid super-root\n"); 1027 hammer2_unmount_helper(mp, NULL, hmp); 1028 lockmgr(&hammer2_mntlk, LK_RELEASE); 1029 hammer2_vfs_unmount(mp, MNT_FORCE); 1030 return EINVAL; 1031 } 1032 if (schain->error) { 1033 kprintf("hammer2_mount: error %s reading super-root\n", 1034 hammer2_error_str(schain->error)); 1035 hammer2_chain_unlock(schain); 1036 hammer2_chain_drop(schain); 1037 schain = NULL; 1038 hammer2_unmount_helper(mp, NULL, hmp); 1039 lockmgr(&hammer2_mntlk, LK_RELEASE); 1040 hammer2_vfs_unmount(mp, MNT_FORCE); 1041 return EINVAL; 1042 } 1043 1044 /* 1045 * The super-root always uses an inode_tid of 1 when 1046 * creating PFSs. 1047 */ 1048 spmp->inode_tid = 1; 1049 spmp->modify_tid = schain->bref.modify_tid + 1; 1050 1051 /* 1052 * Sanity-check schain's pmp and finish initialization. 1053 * Any chain belonging to the super-root topology should 1054 * have a NULL pmp (not even set to spmp). 1055 */ 1056 ripdata = &hammer2_chain_rdata(schain)->ipdata; 1057 KKASSERT(schain->pmp == NULL); 1058 spmp->pfs_clid = ripdata->meta.pfs_clid; 1059 1060 /* 1061 * Replace the dummy spmp->iroot with a real one. It's 1062 * easier to just do a wholesale replacement than to try 1063 * to update the chain and fixup the iroot fields. 1064 * 1065 * The returned inode is locked with the supplied cluster. 1066 */ 1067 cluster = hammer2_cluster_from_chain(schain); 1068 hammer2_inode_drop(spmp->iroot); 1069 spmp->iroot = NULL; 1070 spmp->iroot = hammer2_inode_get(spmp, NULL, cluster, -1); 1071 spmp->spmp_hmp = hmp; 1072 spmp->pfs_types[0] = ripdata->meta.pfs_type; 1073 spmp->pfs_hmps[0] = hmp; 1074 hammer2_inode_ref(spmp->iroot); 1075 hammer2_inode_unlock(spmp->iroot); 1076 hammer2_cluster_unlock(cluster); 1077 hammer2_cluster_drop(cluster); 1078 schain = NULL; 1079 /* leave spmp->iroot with one ref */ 1080 1081 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 1082 error = hammer2_recovery(hmp); 1083 /* XXX do something with error */ 1084 } 1085 hammer2_update_pmps(hmp); 1086 hammer2_iocom_init(hmp); 1087 1088 /* 1089 * Ref the cluster management messaging descriptor. The mount 1090 * program deals with the other end of the communications pipe. 1091 * 1092 * Root mounts typically do not supply one. 1093 */ 1094 if (info.cluster_fd >= 0) { 1095 fp = holdfp(curproc->p_fd, info.cluster_fd, -1); 1096 if (fp) { 1097 hammer2_cluster_reconnect(hmp, fp); 1098 } else { 1099 kprintf("hammer2_mount: bad cluster_fd!\n"); 1100 } 1101 } 1102 } else { 1103 spmp = hmp->spmp; 1104 if (info.hflags & HMNT2_DEVFLAGS) { 1105 kprintf("hammer2: Warning: mount flags pertaining " 1106 "to the whole device may only be specified " 1107 "on the first mount of the device: %08x\n", 1108 info.hflags & HMNT2_DEVFLAGS); 1109 } 1110 } 1111 1112 /* 1113 * Force local mount (disassociate all PFSs from their clusters). 1114 * Used primarily for debugging. 1115 */ 1116 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL; 1117 1118 /* 1119 * Lookup the mount point under the media-localized super-root. 1120 * Scanning hammer2_pfslist doesn't help us because it represents 1121 * PFS cluster ids which can aggregate several named PFSs together. 1122 * 1123 * cluster->pmp will incorrectly point to spmp and must be fixed 1124 * up later on. 1125 */ 1126 hammer2_inode_lock(spmp->iroot, 0); 1127 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS); 1128 lhc = hammer2_dirhash(label, strlen(label)); 1129 chain = hammer2_chain_lookup(&parent, &key_next, 1130 lhc, lhc + HAMMER2_DIRHASH_LOMASK, 1131 &cache_index, 0); 1132 while (chain) { 1133 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && 1134 strcmp(label, chain->data->ipdata.filename) == 0) { 1135 break; 1136 } 1137 chain = hammer2_chain_next(&parent, chain, &key_next, 1138 key_next, 1139 lhc + HAMMER2_DIRHASH_LOMASK, 1140 &cache_index, 0); 1141 } 1142 if (parent) { 1143 hammer2_chain_unlock(parent); 1144 hammer2_chain_drop(parent); 1145 } 1146 hammer2_inode_unlock(spmp->iroot); 1147 1148 /* 1149 * PFS could not be found? 1150 */ 1151 if (chain == NULL) { 1152 kprintf("hammer2_mount: PFS label not found\n"); 1153 hammer2_unmount_helper(mp, NULL, hmp); 1154 lockmgr(&hammer2_mntlk, LK_RELEASE); 1155 hammer2_vfs_unmount(mp, MNT_FORCE); 1156 1157 return EINVAL; 1158 } 1159 1160 /* 1161 * Acquire the pmp structure (it should have already been allocated 1162 * via hammer2_update_pmps() so do not pass cluster in to add to 1163 * available chains). 1164 * 1165 * Check if the cluster has already been mounted. A cluster can 1166 * only be mounted once, use null mounts to mount additional copies. 1167 */ 1168 ripdata = &chain->data->ipdata; 1169 bref = chain->bref; 1170 pmp = hammer2_pfsalloc(NULL, ripdata, bref.modify_tid, force_local); 1171 hammer2_chain_unlock(chain); 1172 hammer2_chain_drop(chain); 1173 1174 if (pmp->mp) { 1175 kprintf("hammer2_mount: PFS already mounted!\n"); 1176 hammer2_unmount_helper(mp, NULL, hmp); 1177 lockmgr(&hammer2_mntlk, LK_RELEASE); 1178 hammer2_vfs_unmount(mp, MNT_FORCE); 1179 1180 return EBUSY; 1181 } 1182 1183 /* 1184 * Finish the mount 1185 */ 1186 kprintf("hammer2_mount hmp=%p pmp=%p\n", hmp, pmp); 1187 1188 pmp->hflags = info.hflags; 1189 mp->mnt_flag = MNT_LOCAL; 1190 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; /* all entry pts are SMP */ 1191 mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */ 1192 1193 /* 1194 * required mount structure initializations 1195 */ 1196 mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE; 1197 mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE; 1198 1199 mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE; 1200 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE; 1201 1202 /* 1203 * Optional fields 1204 */ 1205 mp->mnt_iosize_max = MAXPHYS; 1206 1207 /* 1208 * Connect up mount pointers. 1209 */ 1210 hammer2_mount_helper(mp, pmp); 1211 1212 lockmgr(&hammer2_mntlk, LK_RELEASE); 1213 1214 /* 1215 * Finish setup 1216 */ 1217 vfs_getnewfsid(mp); 1218 vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops); 1219 vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops); 1220 vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops); 1221 1222 if (path) { 1223 copyinstr(info.volume, mp->mnt_stat.f_mntfromname, 1224 MNAMELEN - 1, &size); 1225 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 1226 } /* else root mount, already in there */ 1227 1228 bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname)); 1229 if (path) { 1230 copyinstr(path, mp->mnt_stat.f_mntonname, 1231 sizeof(mp->mnt_stat.f_mntonname) - 1, 1232 &size); 1233 } else { 1234 /* root mount */ 1235 mp->mnt_stat.f_mntonname[0] = '/'; 1236 } 1237 1238 /* 1239 * Initial statfs to prime mnt_stat. 1240 */ 1241 hammer2_vfs_statfs(mp, &mp->mnt_stat, cred); 1242 1243 return 0; 1244 } 1245 1246 /* 1247 * Scan PFSs under the super-root and create hammer2_pfs structures. 1248 */ 1249 static 1250 void 1251 hammer2_update_pmps(hammer2_dev_t *hmp) 1252 { 1253 const hammer2_inode_data_t *ripdata; 1254 hammer2_chain_t *parent; 1255 hammer2_chain_t *chain; 1256 hammer2_blockref_t bref; 1257 hammer2_dev_t *force_local; 1258 hammer2_pfs_t *spmp; 1259 hammer2_pfs_t *pmp; 1260 hammer2_key_t key_next; 1261 int cache_index = -1; 1262 1263 /* 1264 * Force local mount (disassociate all PFSs from their clusters). 1265 * Used primarily for debugging. 1266 */ 1267 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL; 1268 1269 /* 1270 * Lookup mount point under the media-localized super-root. 1271 * 1272 * cluster->pmp will incorrectly point to spmp and must be fixed 1273 * up later on. 1274 */ 1275 spmp = hmp->spmp; 1276 hammer2_inode_lock(spmp->iroot, 0); 1277 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS); 1278 chain = hammer2_chain_lookup(&parent, &key_next, 1279 HAMMER2_KEY_MIN, HAMMER2_KEY_MAX, 1280 &cache_index, 0); 1281 while (chain) { 1282 if (chain->bref.type != HAMMER2_BREF_TYPE_INODE) 1283 continue; 1284 ripdata = &chain->data->ipdata; 1285 bref = chain->bref; 1286 kprintf("ADD LOCAL PFS: %s\n", ripdata->filename); 1287 1288 pmp = hammer2_pfsalloc(chain, ripdata, 1289 bref.modify_tid, force_local); 1290 chain = hammer2_chain_next(&parent, chain, &key_next, 1291 key_next, HAMMER2_KEY_MAX, 1292 &cache_index, 0); 1293 } 1294 if (parent) { 1295 hammer2_chain_unlock(parent); 1296 hammer2_chain_drop(parent); 1297 } 1298 hammer2_inode_unlock(spmp->iroot); 1299 } 1300 1301 static 1302 int 1303 hammer2_remount(hammer2_dev_t *hmp, struct mount *mp, char *path __unused, 1304 struct vnode *devvp, struct ucred *cred) 1305 { 1306 int error; 1307 1308 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 1309 error = hammer2_recovery(hmp); 1310 } else { 1311 error = 0; 1312 } 1313 return error; 1314 } 1315 1316 static 1317 int 1318 hammer2_vfs_unmount(struct mount *mp, int mntflags) 1319 { 1320 hammer2_pfs_t *pmp; 1321 int flags; 1322 int error = 0; 1323 1324 pmp = MPTOPMP(mp); 1325 1326 if (pmp == NULL) 1327 return(0); 1328 1329 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 1330 1331 /* 1332 * If mount initialization proceeded far enough we must flush 1333 * its vnodes and sync the underlying mount points. Three syncs 1334 * are required to fully flush the filesystem (freemap updates lag 1335 * by one flush, and one extra for safety). 1336 */ 1337 if (mntflags & MNT_FORCE) 1338 flags = FORCECLOSE; 1339 else 1340 flags = 0; 1341 if (pmp->iroot) { 1342 error = vflush(mp, 0, flags); 1343 if (error) 1344 goto failed; 1345 hammer2_vfs_sync(mp, MNT_WAIT); 1346 hammer2_vfs_sync(mp, MNT_WAIT); 1347 hammer2_vfs_sync(mp, MNT_WAIT); 1348 } 1349 1350 /* 1351 * Cleanup the frontend support XOPS threads 1352 */ 1353 hammer2_xop_helper_cleanup(pmp); 1354 1355 if (pmp->mp) 1356 hammer2_unmount_helper(mp, pmp, NULL); 1357 1358 error = 0; 1359 failed: 1360 lockmgr(&hammer2_mntlk, LK_RELEASE); 1361 1362 return (error); 1363 } 1364 1365 /* 1366 * Mount helper, hook the system mount into our PFS. 1367 * The mount lock is held. 1368 * 1369 * We must bump the mount_count on related devices for any 1370 * mounted PFSs. 1371 */ 1372 static 1373 void 1374 hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp) 1375 { 1376 hammer2_cluster_t *cluster; 1377 hammer2_chain_t *rchain; 1378 int i; 1379 1380 mp->mnt_data = (qaddr_t)pmp; 1381 pmp->mp = mp; 1382 1383 /* 1384 * After pmp->mp is set we have to adjust hmp->mount_count. 1385 */ 1386 cluster = &pmp->iroot->cluster; 1387 for (i = 0; i < cluster->nchains; ++i) { 1388 rchain = cluster->array[i].chain; 1389 if (rchain == NULL) 1390 continue; 1391 ++rchain->hmp->mount_count; 1392 kprintf("hammer2_mount hmp=%p ++mount_count=%d\n", 1393 rchain->hmp, rchain->hmp->mount_count); 1394 } 1395 1396 /* 1397 * Create missing Xop threads 1398 */ 1399 hammer2_xop_helper_create(pmp); 1400 } 1401 1402 /* 1403 * Mount helper, unhook the system mount from our PFS. 1404 * The mount lock is held. 1405 * 1406 * If hmp is supplied a mount responsible for being the first to open 1407 * the block device failed and the block device and all PFSs using the 1408 * block device must be cleaned up. 1409 * 1410 * If pmp is supplied multiple devices might be backing the PFS and each 1411 * must be disconnected. This might not be the last PFS using some of the 1412 * underlying devices. Also, we have to adjust our hmp->mount_count 1413 * accounting for the devices backing the pmp which is now undergoing an 1414 * unmount. 1415 */ 1416 static 1417 void 1418 hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp, hammer2_dev_t *hmp) 1419 { 1420 hammer2_cluster_t *cluster; 1421 hammer2_chain_t *rchain; 1422 struct vnode *devvp; 1423 int dumpcnt; 1424 int ronly = 0; 1425 int i; 1426 1427 /* 1428 * If no device supplied this is a high-level unmount and we have to 1429 * to disconnect the mount, adjust mount_count, and locate devices 1430 * that might now have no mounts. 1431 */ 1432 if (pmp) { 1433 KKASSERT(hmp == NULL); 1434 KKASSERT((void *)(intptr_t)mp->mnt_data == pmp); 1435 pmp->mp = NULL; 1436 mp->mnt_data = NULL; 1437 1438 /* 1439 * After pmp->mp is cleared we have to account for 1440 * mount_count. 1441 */ 1442 cluster = &pmp->iroot->cluster; 1443 for (i = 0; i < cluster->nchains; ++i) { 1444 rchain = cluster->array[i].chain; 1445 if (rchain == NULL) 1446 continue; 1447 --rchain->hmp->mount_count; 1448 kprintf("hammer2_unmount hmp=%p --mount_count=%d\n", 1449 rchain->hmp, rchain->hmp->mount_count); 1450 /* scrapping hmp now may invalidate the pmp */ 1451 } 1452 again: 1453 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) { 1454 if (hmp->mount_count == 0) { 1455 hammer2_unmount_helper(NULL, NULL, hmp); 1456 goto again; 1457 } 1458 } 1459 return; 1460 } 1461 1462 /* 1463 * Try to terminate the block device. We can't terminate it if 1464 * there are still PFSs referencing it. 1465 */ 1466 kprintf("hammer2_unmount hmp=%p mount_count=%d\n", 1467 hmp, hmp->mount_count); 1468 if (hmp->mount_count) 1469 return; 1470 1471 hammer2_pfsfree_scan(hmp); 1472 hammer2_dev_exlock(hmp); /* XXX order */ 1473 1474 /* 1475 * Cycle the volume data lock as a safety (probably not needed any 1476 * more). To ensure everything is out we need to flush at least 1477 * three times. (1) The running of the sideq can dirty the 1478 * filesystem, (2) A normal flush can dirty the freemap, and 1479 * (3) ensure that the freemap is fully synchronized. 1480 * 1481 * The next mount's recovery scan can clean everything up but we want 1482 * to leave the filesystem in a 100% clean state on a normal unmount. 1483 */ 1484 #if 0 1485 hammer2_voldata_lock(hmp); 1486 hammer2_voldata_unlock(hmp); 1487 #endif 1488 hammer2_iocom_uninit(hmp); 1489 1490 if ((hmp->vchain.flags | hmp->fchain.flags) & 1491 HAMMER2_CHAIN_FLUSH_MASK) { 1492 kprintf("hammer2_unmount: chains left over " 1493 "after final sync\n"); 1494 kprintf(" vchain %08x\n", hmp->vchain.flags); 1495 kprintf(" fchain %08x\n", hmp->fchain.flags); 1496 1497 if (hammer2_debug & 0x0010) 1498 Debugger("entered debugger"); 1499 } 1500 1501 KKASSERT(hmp->spmp == NULL); 1502 1503 /* 1504 * Finish up with the device vnode 1505 */ 1506 if ((devvp = hmp->devvp) != NULL) { 1507 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1508 vinvalbuf(devvp, (ronly ? 0 : V_SAVE), 0, 0); 1509 hmp->devvp = NULL; 1510 VOP_CLOSE(devvp, (ronly ? FREAD : FREAD|FWRITE), NULL); 1511 vn_unlock(devvp); 1512 vrele(devvp); 1513 devvp = NULL; 1514 } 1515 1516 /* 1517 * Clear vchain/fchain flags that might prevent final cleanup 1518 * of these chains. 1519 */ 1520 if (hmp->vchain.flags & HAMMER2_CHAIN_MODIFIED) { 1521 atomic_add_long(&hammer2_count_modified_chains, -1); 1522 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_MODIFIED); 1523 hammer2_pfs_memory_wakeup(hmp->vchain.pmp); 1524 } 1525 if (hmp->vchain.flags & HAMMER2_CHAIN_UPDATE) { 1526 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_UPDATE); 1527 } 1528 1529 if (hmp->fchain.flags & HAMMER2_CHAIN_MODIFIED) { 1530 atomic_add_long(&hammer2_count_modified_chains, -1); 1531 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_MODIFIED); 1532 hammer2_pfs_memory_wakeup(hmp->fchain.pmp); 1533 } 1534 if (hmp->fchain.flags & HAMMER2_CHAIN_UPDATE) { 1535 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_UPDATE); 1536 } 1537 1538 /* 1539 * Final drop of embedded freemap root chain to 1540 * clean up fchain.core (fchain structure is not 1541 * flagged ALLOCATED so it is cleaned out and then 1542 * left to rot). 1543 */ 1544 hammer2_chain_drop(&hmp->fchain); 1545 1546 /* 1547 * Final drop of embedded volume root chain to clean 1548 * up vchain.core (vchain structure is not flagged 1549 * ALLOCATED so it is cleaned out and then left to 1550 * rot). 1551 */ 1552 dumpcnt = 50; 1553 hammer2_dump_chain(&hmp->vchain, 0, &dumpcnt, 'v'); 1554 dumpcnt = 50; 1555 hammer2_dump_chain(&hmp->fchain, 0, &dumpcnt, 'f'); 1556 hammer2_dev_unlock(hmp); 1557 hammer2_chain_drop(&hmp->vchain); 1558 1559 hammer2_io_cleanup(hmp, &hmp->iotree); 1560 if (hmp->iofree_count) { 1561 kprintf("io_cleanup: %d I/O's left hanging\n", 1562 hmp->iofree_count); 1563 } 1564 1565 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry); 1566 kmalloc_destroy(&hmp->mchain); 1567 kfree(hmp, M_HAMMER2); 1568 } 1569 1570 int 1571 hammer2_vfs_vget(struct mount *mp, struct vnode *dvp, 1572 ino_t ino, struct vnode **vpp) 1573 { 1574 hammer2_xop_lookup_t *xop; 1575 hammer2_pfs_t *pmp; 1576 hammer2_inode_t *ip; 1577 hammer2_tid_t inum; 1578 int error; 1579 1580 inum = (hammer2_tid_t)ino & HAMMER2_DIRHASH_USERMSK; 1581 1582 error = 0; 1583 pmp = MPTOPMP(mp); 1584 1585 /* 1586 * Easy if we already have it cached 1587 */ 1588 ip = hammer2_inode_lookup(pmp, inum); 1589 if (ip) { 1590 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED); 1591 *vpp = hammer2_igetv(ip, &error); 1592 hammer2_inode_unlock(ip); 1593 hammer2_inode_drop(ip); /* from lookup */ 1594 1595 return error; 1596 } 1597 1598 /* 1599 * Otherwise we have to find the inode 1600 */ 1601 xop = hammer2_xop_alloc(pmp->iroot, 0); 1602 xop->lhc = inum; 1603 hammer2_xop_start(&xop->head, hammer2_xop_lookup); 1604 error = hammer2_xop_collect(&xop->head, 0); 1605 1606 if (error == 0) { 1607 if (hammer2_cluster_rdata(&xop->head.cluster) == NULL) { 1608 kprintf("vget: no collect error but also no rdata\n"); 1609 kprintf("xop %p\n", xop); 1610 while ((hammer2_debug & 0x80000) == 0) { 1611 tsleep(xop, PCATCH, "wait", hz * 10); 1612 } 1613 ip = NULL; 1614 } else { 1615 ip = hammer2_inode_get(pmp, NULL, &xop->head.cluster, -1); 1616 } 1617 } 1618 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1619 1620 if (ip) { 1621 *vpp = hammer2_igetv(ip, &error); 1622 hammer2_inode_unlock(ip); 1623 } else { 1624 *vpp = NULL; 1625 error = ENOENT; 1626 } 1627 return (error); 1628 } 1629 1630 static 1631 int 1632 hammer2_vfs_root(struct mount *mp, struct vnode **vpp) 1633 { 1634 hammer2_pfs_t *pmp; 1635 struct vnode *vp; 1636 int error; 1637 1638 pmp = MPTOPMP(mp); 1639 if (pmp->iroot == NULL) { 1640 *vpp = NULL; 1641 return EINVAL; 1642 } 1643 1644 error = 0; 1645 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED); 1646 1647 while (pmp->inode_tid == 0) { 1648 hammer2_xop_ipcluster_t *xop; 1649 hammer2_inode_meta_t *meta; 1650 1651 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING); 1652 hammer2_xop_start(&xop->head, hammer2_xop_ipcluster); 1653 error = hammer2_xop_collect(&xop->head, 0); 1654 1655 if (error == 0) { 1656 meta = &xop->head.cluster.focus->data->ipdata.meta; 1657 pmp->iroot->meta = *meta; 1658 pmp->inode_tid = meta->pfs_inum + 1; 1659 if (pmp->inode_tid < HAMMER2_INODE_START) 1660 pmp->inode_tid = HAMMER2_INODE_START; 1661 pmp->modify_tid = 1662 xop->head.cluster.focus->bref.modify_tid + 1; 1663 kprintf("PFS: Starting inode %jd\n", 1664 (intmax_t)pmp->inode_tid); 1665 kprintf("PMP focus good set nextino=%ld mod=%016jx\n", 1666 pmp->inode_tid, pmp->modify_tid); 1667 wakeup(&pmp->iroot); 1668 1669 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1670 1671 /* 1672 * Prime the mount info. 1673 */ 1674 hammer2_vfs_statfs(mp, &mp->mnt_stat, NULL); 1675 break; 1676 } 1677 1678 /* 1679 * Loop, try again 1680 */ 1681 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1682 hammer2_inode_unlock(pmp->iroot); 1683 error = tsleep(&pmp->iroot, PCATCH, "h2root", hz); 1684 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED); 1685 if (error == EINTR) 1686 break; 1687 } 1688 1689 if (error) { 1690 hammer2_inode_unlock(pmp->iroot); 1691 *vpp = NULL; 1692 } else { 1693 vp = hammer2_igetv(pmp->iroot, &error); 1694 hammer2_inode_unlock(pmp->iroot); 1695 *vpp = vp; 1696 } 1697 1698 return (error); 1699 } 1700 1701 /* 1702 * Filesystem status 1703 * 1704 * XXX incorporate ipdata->meta.inode_quota and data_quota 1705 */ 1706 static 1707 int 1708 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 1709 { 1710 hammer2_pfs_t *pmp; 1711 hammer2_dev_t *hmp; 1712 hammer2_blockref_t bref; 1713 int i; 1714 1715 /* 1716 * NOTE: iroot might not have validated the cluster yet. 1717 */ 1718 pmp = MPTOPMP(mp); 1719 1720 mp->mnt_stat.f_files = 0; 1721 mp->mnt_stat.f_ffree = 0; 1722 mp->mnt_stat.f_blocks = 0; 1723 mp->mnt_stat.f_bfree = 0; 1724 mp->mnt_stat.f_bavail = 0; 1725 1726 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) { 1727 hmp = pmp->pfs_hmps[i]; 1728 if (hmp == NULL) 1729 continue; 1730 if (pmp->iroot->cluster.array[i].chain) 1731 bref = pmp->iroot->cluster.array[i].chain->bref; 1732 else 1733 bzero(&bref, sizeof(bref)); 1734 1735 mp->mnt_stat.f_files = bref.inode_count; 1736 mp->mnt_stat.f_ffree = 0; 1737 #if 0 1738 mp->mnt_stat.f_blocks = (bref.data_count + 1739 hmp->voldata.allocator_free) / 1740 mp->mnt_vstat.f_bsize; 1741 mp->mnt_stat.f_bfree = hmp->voldata.allocator_free / 1742 mp->mnt_vstat.f_bsize; 1743 #endif 1744 mp->mnt_stat.f_blocks = hmp->voldata.allocator_size / 1745 mp->mnt_vstat.f_bsize; 1746 mp->mnt_stat.f_bfree = hmp->voldata.allocator_free / 1747 mp->mnt_vstat.f_bsize; 1748 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree; 1749 1750 *sbp = mp->mnt_stat; 1751 } 1752 return (0); 1753 } 1754 1755 static 1756 int 1757 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 1758 { 1759 hammer2_pfs_t *pmp; 1760 hammer2_dev_t *hmp; 1761 hammer2_blockref_t bref; 1762 int i; 1763 1764 /* 1765 * NOTE: iroot might not have validated the cluster yet. 1766 */ 1767 pmp = MPTOPMP(mp); 1768 1769 mp->mnt_vstat.f_bsize = 0; 1770 mp->mnt_vstat.f_files = 0; 1771 mp->mnt_vstat.f_ffree = 0; 1772 mp->mnt_vstat.f_blocks = 0; 1773 mp->mnt_vstat.f_bfree = 0; 1774 mp->mnt_vstat.f_bavail = 0; 1775 1776 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) { 1777 hmp = pmp->pfs_hmps[i]; 1778 if (hmp == NULL) 1779 continue; 1780 if (pmp->iroot->cluster.array[i].chain) 1781 bref = pmp->iroot->cluster.array[i].chain->bref; 1782 else 1783 bzero(&bref, sizeof(bref)); 1784 1785 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE; 1786 mp->mnt_vstat.f_files = bref.inode_count; 1787 mp->mnt_vstat.f_ffree = 0; 1788 #if 0 1789 mp->mnt_vstat.f_blocks = (bref.data_count + 1790 hmp->voldata.allocator_free) / 1791 mp->mnt_vstat.f_bsize; 1792 mp->mnt_vstat.f_bfree = hmp->voldata.allocator_free / 1793 mp->mnt_vstat.f_bsize; 1794 #endif 1795 mp->mnt_vstat.f_blocks = hmp->voldata.allocator_size / 1796 mp->mnt_vstat.f_bsize; 1797 mp->mnt_vstat.f_bfree = hmp->voldata.allocator_free / 1798 mp->mnt_vstat.f_bsize; 1799 mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree; 1800 1801 *sbp = mp->mnt_vstat; 1802 } 1803 return (0); 1804 } 1805 1806 /* 1807 * Mount-time recovery (RW mounts) 1808 * 1809 * Updates to the free block table are allowed to lag flushes by one 1810 * transaction. In case of a crash, then on a fresh mount we must do an 1811 * incremental scan of the last committed transaction id and make sure that 1812 * all related blocks have been marked allocated. 1813 * 1814 * The super-root topology and each PFS has its own transaction id domain, 1815 * so we must track PFS boundary transitions. 1816 */ 1817 struct hammer2_recovery_elm { 1818 TAILQ_ENTRY(hammer2_recovery_elm) entry; 1819 hammer2_chain_t *chain; 1820 hammer2_tid_t sync_tid; 1821 }; 1822 1823 TAILQ_HEAD(hammer2_recovery_list, hammer2_recovery_elm); 1824 1825 struct hammer2_recovery_info { 1826 struct hammer2_recovery_list list; 1827 hammer2_tid_t mtid; 1828 int depth; 1829 }; 1830 1831 static int hammer2_recovery_scan(hammer2_dev_t *hmp, 1832 hammer2_chain_t *parent, 1833 struct hammer2_recovery_info *info, 1834 hammer2_tid_t sync_tid); 1835 1836 #define HAMMER2_RECOVERY_MAXDEPTH 10 1837 1838 static 1839 int 1840 hammer2_recovery(hammer2_dev_t *hmp) 1841 { 1842 struct hammer2_recovery_info info; 1843 struct hammer2_recovery_elm *elm; 1844 hammer2_chain_t *parent; 1845 hammer2_tid_t sync_tid; 1846 hammer2_tid_t mirror_tid; 1847 int error; 1848 int cumulative_error = 0; 1849 1850 hammer2_trans_init(hmp->spmp, 0); 1851 1852 sync_tid = hmp->voldata.freemap_tid; 1853 mirror_tid = hmp->voldata.mirror_tid; 1854 1855 kprintf("hammer2 mount \"%s\": ", hmp->devrepname); 1856 if (sync_tid >= mirror_tid) { 1857 kprintf(" no recovery needed\n"); 1858 } else { 1859 kprintf(" freemap recovery %016jx-%016jx\n", 1860 sync_tid + 1, mirror_tid); 1861 } 1862 1863 TAILQ_INIT(&info.list); 1864 info.depth = 0; 1865 parent = hammer2_chain_lookup_init(&hmp->vchain, 0); 1866 cumulative_error = hammer2_recovery_scan(hmp, parent, &info, sync_tid); 1867 hammer2_chain_lookup_done(parent); 1868 1869 while ((elm = TAILQ_FIRST(&info.list)) != NULL) { 1870 TAILQ_REMOVE(&info.list, elm, entry); 1871 parent = elm->chain; 1872 sync_tid = elm->sync_tid; 1873 kfree(elm, M_HAMMER2); 1874 1875 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS); 1876 error = hammer2_recovery_scan(hmp, parent, &info, 1877 hmp->voldata.freemap_tid); 1878 hammer2_chain_unlock(parent); 1879 hammer2_chain_drop(parent); /* drop elm->chain ref */ 1880 if (error) 1881 cumulative_error = error; 1882 } 1883 hammer2_trans_done(hmp->spmp); 1884 1885 return cumulative_error; 1886 } 1887 1888 static 1889 int 1890 hammer2_recovery_scan(hammer2_dev_t *hmp, hammer2_chain_t *parent, 1891 struct hammer2_recovery_info *info, 1892 hammer2_tid_t sync_tid) 1893 { 1894 const hammer2_inode_data_t *ripdata; 1895 hammer2_chain_t *chain; 1896 hammer2_blockref_t bref; 1897 int cache_index; 1898 int cumulative_error = 0; 1899 int error; 1900 int first; 1901 1902 /* 1903 * Adjust freemap to ensure that the block(s) are marked allocated. 1904 */ 1905 if (parent->bref.type != HAMMER2_BREF_TYPE_VOLUME) { 1906 hammer2_freemap_adjust(hmp, &parent->bref, 1907 HAMMER2_FREEMAP_DORECOVER); 1908 } 1909 1910 /* 1911 * Check type for recursive scan 1912 */ 1913 switch(parent->bref.type) { 1914 case HAMMER2_BREF_TYPE_VOLUME: 1915 /* data already instantiated */ 1916 break; 1917 case HAMMER2_BREF_TYPE_INODE: 1918 /* 1919 * Must instantiate data for DIRECTDATA test and also 1920 * for recursion. 1921 */ 1922 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS); 1923 ripdata = &hammer2_chain_rdata(parent)->ipdata; 1924 if (ripdata->meta.op_flags & HAMMER2_OPFLAG_DIRECTDATA) { 1925 /* not applicable to recovery scan */ 1926 hammer2_chain_unlock(parent); 1927 return 0; 1928 } 1929 hammer2_chain_unlock(parent); 1930 break; 1931 case HAMMER2_BREF_TYPE_INDIRECT: 1932 /* 1933 * Must instantiate data for recursion 1934 */ 1935 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS); 1936 hammer2_chain_unlock(parent); 1937 break; 1938 case HAMMER2_BREF_TYPE_DATA: 1939 case HAMMER2_BREF_TYPE_FREEMAP: 1940 case HAMMER2_BREF_TYPE_FREEMAP_NODE: 1941 case HAMMER2_BREF_TYPE_FREEMAP_LEAF: 1942 /* not applicable to recovery scan */ 1943 return 0; 1944 break; 1945 default: 1946 return EDOM; 1947 } 1948 1949 /* 1950 * Defer operation if depth limit reached or if we are crossing a 1951 * PFS boundary. 1952 */ 1953 if (info->depth >= HAMMER2_RECOVERY_MAXDEPTH) { 1954 struct hammer2_recovery_elm *elm; 1955 1956 elm = kmalloc(sizeof(*elm), M_HAMMER2, M_ZERO | M_WAITOK); 1957 elm->chain = parent; 1958 elm->sync_tid = sync_tid; 1959 hammer2_chain_ref(parent); 1960 TAILQ_INSERT_TAIL(&info->list, elm, entry); 1961 /* unlocked by caller */ 1962 1963 return(0); 1964 } 1965 1966 1967 /* 1968 * Recursive scan of the last flushed transaction only. We are 1969 * doing this without pmp assignments so don't leave the chains 1970 * hanging around after we are done with them. 1971 */ 1972 cache_index = 0; 1973 chain = NULL; 1974 first = 1; 1975 1976 while (hammer2_chain_scan(parent, &chain, &bref, 1977 &first, &cache_index, 1978 HAMMER2_LOOKUP_NODATA) != NULL) { 1979 /* 1980 * If this is a leaf 1981 */ 1982 if (chain == NULL) { 1983 if (bref.mirror_tid > sync_tid) { 1984 hammer2_freemap_adjust(hmp, &bref, 1985 HAMMER2_FREEMAP_DORECOVER); 1986 } 1987 continue; 1988 } 1989 1990 /* 1991 * This may or may not be a recursive node. 1992 */ 1993 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE); 1994 if (bref.mirror_tid > sync_tid) { 1995 ++info->depth; 1996 error = hammer2_recovery_scan(hmp, chain, 1997 info, sync_tid); 1998 --info->depth; 1999 if (error) 2000 cumulative_error = error; 2001 } 2002 2003 /* 2004 * Flush the recovery at the PFS boundary to stage it for 2005 * the final flush of the super-root topology. 2006 */ 2007 if ((bref.flags & HAMMER2_BREF_FLAG_PFSROOT) && 2008 (chain->flags & HAMMER2_CHAIN_ONFLUSH)) { 2009 hammer2_flush(chain, HAMMER2_FLUSH_TOP); 2010 } 2011 } 2012 2013 return cumulative_error; 2014 } 2015 2016 /* 2017 * Sync a mount point; this is called on a per-mount basis from the 2018 * filesystem syncer process periodically and whenever a user issues 2019 * a sync. 2020 */ 2021 int 2022 hammer2_vfs_sync(struct mount *mp, int waitfor) 2023 { 2024 hammer2_xop_flush_t *xop; 2025 struct hammer2_sync_info info; 2026 hammer2_inode_t *iroot; 2027 hammer2_pfs_t *pmp; 2028 int flags; 2029 int error; 2030 2031 pmp = MPTOPMP(mp); 2032 iroot = pmp->iroot; 2033 KKASSERT(iroot); 2034 KKASSERT(iroot->pmp == pmp); 2035 2036 /* 2037 * We can't acquire locks on existing vnodes while in a transaction 2038 * without risking a deadlock. This assumes that vfsync() can be 2039 * called without the vnode locked (which it can in DragonFly). 2040 * Otherwise we'd have to implement a multi-pass or flag the lock 2041 * failures and retry. 2042 * 2043 * The reclamation code interlocks with the sync list's token 2044 * (by removing the vnode from the scan list) before unlocking 2045 * the inode, giving us time to ref the inode. 2046 */ 2047 /*flags = VMSC_GETVP;*/ 2048 flags = 0; 2049 if (waitfor & MNT_LAZY) 2050 flags |= VMSC_ONEPASS; 2051 2052 /* 2053 * Preflush the vnodes using a normal transaction before interlocking 2054 * with a flush transaction. We do this to try to run as much of 2055 * the compression as possible outside the flush transaction. 2056 * 2057 * For efficiency do an async pass before making sure with a 2058 * synchronous pass on all related buffer cache buffers. 2059 */ 2060 hammer2_trans_init(pmp, 0); 2061 info.error = 0; 2062 info.waitfor = MNT_NOWAIT; 2063 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info); 2064 info.waitfor = MNT_WAIT; 2065 vsyncscan(mp, flags, hammer2_sync_scan2, &info); 2066 hammer2_trans_done(pmp); 2067 2068 /* 2069 * Start our flush transaction. This does not return until all 2070 * concurrent transactions have completed and will prevent any 2071 * new transactions from running concurrently, except for the 2072 * buffer cache transactions. 2073 * 2074 * NOTE! It is still possible for the paging code to push pages 2075 * out via a UIO_NOCOPY hammer2_vop_write() during the main 2076 * flush. 2077 */ 2078 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH); 2079 hammer2_inode_run_sideq(pmp); 2080 2081 info.error = 0; 2082 info.waitfor = MNT_NOWAIT; 2083 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info); 2084 info.waitfor = MNT_WAIT; 2085 vsyncscan(mp, flags, hammer2_sync_scan2, &info); 2086 hammer2_bioq_sync(pmp); 2087 2088 /* 2089 * Use the XOP interface to concurrently flush all nodes to 2090 * synchronize the PFSROOT subtopology to the media. A standard 2091 * end-of-scan ENOENT error indicates cluster sufficiency. 2092 * 2093 * Note that this flush will not be visible on crash recovery until 2094 * we flush the super-root topology in the next loop. 2095 * 2096 * XXX For now wait for all flushes to complete. 2097 */ 2098 if (iroot) { 2099 xop = hammer2_xop_alloc(iroot, HAMMER2_XOP_MODIFYING); 2100 hammer2_xop_start(&xop->head, hammer2_inode_xop_flush); 2101 error = hammer2_xop_collect(&xop->head, 2102 HAMMER2_XOP_COLLECT_WAITALL); 2103 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 2104 if (error == ENOENT) 2105 error = 0; 2106 } else { 2107 error = 0; 2108 } 2109 hammer2_trans_done(pmp); 2110 2111 return (error); 2112 } 2113 2114 /* 2115 * Sync passes. 2116 * 2117 * Note that we ignore the tranasction mtid we got above. Instead, 2118 * each vfsync below will ultimately get its own via TRANS_BUFCACHE 2119 * transactions. 2120 */ 2121 static int 2122 hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data) 2123 { 2124 struct hammer2_sync_info *info = data; 2125 hammer2_inode_t *ip; 2126 int error; 2127 2128 /* 2129 * Degenerate cases. Note that ip == NULL typically means the 2130 * syncer vnode itself and we don't want to vclrisdirty() in that 2131 * situation. 2132 */ 2133 ip = VTOI(vp); 2134 if (ip == NULL) { 2135 return(0); 2136 } 2137 if (vp->v_type == VNON || vp->v_type == VBAD) { 2138 vclrisdirty(vp); 2139 return(0); 2140 } 2141 2142 /* 2143 * VOP_FSYNC will start a new transaction so replicate some code 2144 * here to do it inline (see hammer2_vop_fsync()). 2145 * 2146 * WARNING: The vfsync interacts with the buffer cache and might 2147 * block, we can't hold the inode lock at that time. 2148 * However, we MUST ref ip before blocking to ensure that 2149 * it isn't ripped out from under us (since we do not 2150 * hold a lock on the vnode). 2151 */ 2152 hammer2_inode_ref(ip); 2153 if ((ip->flags & HAMMER2_INODE_MODIFIED) || 2154 !RB_EMPTY(&vp->v_rbdirty_tree)) { 2155 vfsync(vp, info->waitfor, 1, NULL, NULL); 2156 if (ip->flags & (HAMMER2_INODE_RESIZED | 2157 HAMMER2_INODE_MODIFIED)) { 2158 hammer2_inode_lock(ip, 0); 2159 hammer2_inode_chain_sync(ip); 2160 hammer2_inode_unlock(ip); 2161 } 2162 } 2163 if ((ip->flags & HAMMER2_INODE_MODIFIED) == 0 && 2164 RB_EMPTY(&vp->v_rbdirty_tree)) { 2165 vclrisdirty(vp); 2166 } 2167 2168 hammer2_inode_drop(ip); 2169 #if 1 2170 error = 0; 2171 if (error) 2172 info->error = error; 2173 #endif 2174 return(0); 2175 } 2176 2177 static 2178 int 2179 hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp) 2180 { 2181 hammer2_inode_t *ip; 2182 2183 KKASSERT(MAXFIDSZ >= 16); 2184 ip = VTOI(vp); 2185 fhp->fid_len = offsetof(struct fid, fid_data[16]); 2186 fhp->fid_ext = 0; 2187 ((hammer2_tid_t *)fhp->fid_data)[0] = ip->meta.inum; 2188 ((hammer2_tid_t *)fhp->fid_data)[1] = 0; 2189 2190 return 0; 2191 } 2192 2193 static 2194 int 2195 hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 2196 struct fid *fhp, struct vnode **vpp) 2197 { 2198 hammer2_pfs_t *pmp; 2199 hammer2_tid_t inum; 2200 int error; 2201 2202 pmp = MPTOPMP(mp); 2203 inum = ((hammer2_tid_t *)fhp->fid_data)[0] & HAMMER2_DIRHASH_USERMSK; 2204 if (vpp) { 2205 if (inum == 1) 2206 error = hammer2_vfs_root(mp, vpp); 2207 else 2208 error = hammer2_vfs_vget(mp, NULL, inum, vpp); 2209 } else { 2210 error = 0; 2211 } 2212 if (error) 2213 kprintf("fhtovp: %016jx -> %p, %d\n", inum, *vpp, error); 2214 return error; 2215 } 2216 2217 static 2218 int 2219 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 2220 int *exflagsp, struct ucred **credanonp) 2221 { 2222 hammer2_pfs_t *pmp; 2223 struct netcred *np; 2224 int error; 2225 2226 pmp = MPTOPMP(mp); 2227 np = vfs_export_lookup(mp, &pmp->export, nam); 2228 if (np) { 2229 *exflagsp = np->netc_exflags; 2230 *credanonp = &np->netc_anon; 2231 error = 0; 2232 } else { 2233 error = EACCES; 2234 } 2235 return error; 2236 } 2237 2238 /* 2239 * Support code for hammer2_vfs_mount(). Read, verify, and install the volume 2240 * header into the HMP 2241 * 2242 * XXX read four volhdrs and use the one with the highest TID whos CRC 2243 * matches. 2244 * 2245 * XXX check iCRCs. 2246 * 2247 * XXX For filesystems w/ less than 4 volhdrs, make sure to not write to 2248 * nonexistant locations. 2249 * 2250 * XXX Record selected volhdr and ring updates to each of 4 volhdrs 2251 */ 2252 static 2253 int 2254 hammer2_install_volume_header(hammer2_dev_t *hmp) 2255 { 2256 hammer2_volume_data_t *vd; 2257 struct buf *bp; 2258 hammer2_crc32_t crc0, crc, bcrc0, bcrc; 2259 int error_reported; 2260 int error; 2261 int valid; 2262 int i; 2263 2264 error_reported = 0; 2265 error = 0; 2266 valid = 0; 2267 bp = NULL; 2268 2269 /* 2270 * There are up to 4 copies of the volume header (syncs iterate 2271 * between them so there is no single master). We don't trust the 2272 * volu_size field so we don't know precisely how large the filesystem 2273 * is, so depend on the OS to return an error if we go beyond the 2274 * block device's EOF. 2275 */ 2276 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) { 2277 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64, 2278 HAMMER2_VOLUME_BYTES, &bp); 2279 if (error) { 2280 brelse(bp); 2281 bp = NULL; 2282 continue; 2283 } 2284 2285 vd = (struct hammer2_volume_data *) bp->b_data; 2286 if ((vd->magic != HAMMER2_VOLUME_ID_HBO) && 2287 (vd->magic != HAMMER2_VOLUME_ID_ABO)) { 2288 brelse(bp); 2289 bp = NULL; 2290 continue; 2291 } 2292 2293 if (vd->magic == HAMMER2_VOLUME_ID_ABO) { 2294 /* XXX: Reversed-endianness filesystem */ 2295 kprintf("hammer2: reverse-endian filesystem detected"); 2296 brelse(bp); 2297 bp = NULL; 2298 continue; 2299 } 2300 2301 crc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT0]; 2302 crc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC0_OFF, 2303 HAMMER2_VOLUME_ICRC0_SIZE); 2304 bcrc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT1]; 2305 bcrc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC1_OFF, 2306 HAMMER2_VOLUME_ICRC1_SIZE); 2307 if ((crc0 != crc) || (bcrc0 != bcrc)) { 2308 kprintf("hammer2 volume header crc " 2309 "mismatch copy #%d %08x/%08x\n", 2310 i, crc0, crc); 2311 error_reported = 1; 2312 brelse(bp); 2313 bp = NULL; 2314 continue; 2315 } 2316 if (valid == 0 || hmp->voldata.mirror_tid < vd->mirror_tid) { 2317 valid = 1; 2318 hmp->voldata = *vd; 2319 hmp->volhdrno = i; 2320 } 2321 brelse(bp); 2322 bp = NULL; 2323 } 2324 if (valid) { 2325 hmp->volsync = hmp->voldata; 2326 error = 0; 2327 if (error_reported || bootverbose || 1) { /* 1/DEBUG */ 2328 kprintf("hammer2: using volume header #%d\n", 2329 hmp->volhdrno); 2330 } 2331 } else { 2332 error = EINVAL; 2333 kprintf("hammer2: no valid volume headers found!\n"); 2334 } 2335 return (error); 2336 } 2337 2338 /* 2339 * This handles hysteresis on regular file flushes. Because the BIOs are 2340 * routed to a thread it is possible for an excessive number to build up 2341 * and cause long front-end stalls long before the runningbuffspace limit 2342 * is hit, so we implement hammer2_flush_pipe to control the 2343 * hysteresis. 2344 * 2345 * This is a particular problem when compression is used. 2346 */ 2347 void 2348 hammer2_lwinprog_ref(hammer2_pfs_t *pmp) 2349 { 2350 atomic_add_int(&pmp->count_lwinprog, 1); 2351 } 2352 2353 void 2354 hammer2_lwinprog_drop(hammer2_pfs_t *pmp) 2355 { 2356 int lwinprog; 2357 2358 lwinprog = atomic_fetchadd_int(&pmp->count_lwinprog, -1); 2359 if ((lwinprog & HAMMER2_LWINPROG_WAITING) && 2360 (lwinprog & HAMMER2_LWINPROG_MASK) <= hammer2_flush_pipe * 2 / 3) { 2361 atomic_clear_int(&pmp->count_lwinprog, 2362 HAMMER2_LWINPROG_WAITING); 2363 wakeup(&pmp->count_lwinprog); 2364 } 2365 if ((lwinprog & HAMMER2_LWINPROG_WAITING0) && 2366 (lwinprog & HAMMER2_LWINPROG_MASK) <= 0) { 2367 atomic_clear_int(&pmp->count_lwinprog, 2368 HAMMER2_LWINPROG_WAITING0); 2369 wakeup(&pmp->count_lwinprog); 2370 } 2371 } 2372 2373 void 2374 hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int flush_pipe) 2375 { 2376 int lwinprog; 2377 int lwflag = (flush_pipe) ? HAMMER2_LWINPROG_WAITING : 2378 HAMMER2_LWINPROG_WAITING0; 2379 2380 for (;;) { 2381 lwinprog = pmp->count_lwinprog; 2382 cpu_ccfence(); 2383 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe) 2384 break; 2385 tsleep_interlock(&pmp->count_lwinprog, 0); 2386 atomic_set_int(&pmp->count_lwinprog, lwflag); 2387 lwinprog = pmp->count_lwinprog; 2388 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe) 2389 break; 2390 tsleep(&pmp->count_lwinprog, PINTERLOCKED, "h2wpipe", hz); 2391 } 2392 } 2393 2394 /* 2395 * Manage excessive memory resource use for chain and related 2396 * structures. 2397 */ 2398 void 2399 hammer2_pfs_memory_wait(hammer2_pfs_t *pmp) 2400 { 2401 uint32_t waiting; 2402 uint32_t count; 2403 uint32_t limit; 2404 #if 0 2405 static int zzticks; 2406 #endif 2407 2408 /* 2409 * Atomic check condition and wait. Also do an early speedup of 2410 * the syncer to try to avoid hitting the wait. 2411 */ 2412 for (;;) { 2413 waiting = pmp->inmem_dirty_chains; 2414 cpu_ccfence(); 2415 count = waiting & HAMMER2_DIRTYCHAIN_MASK; 2416 2417 limit = pmp->mp->mnt_nvnodelistsize / 10; 2418 if (limit < hammer2_limit_dirty_chains) 2419 limit = hammer2_limit_dirty_chains; 2420 if (limit < 1000) 2421 limit = 1000; 2422 2423 #if 0 2424 if ((int)(ticks - zzticks) > hz) { 2425 zzticks = ticks; 2426 kprintf("count %ld %ld\n", count, limit); 2427 } 2428 #endif 2429 2430 /* 2431 * Block if there are too many dirty chains present, wait 2432 * for the flush to clean some out. 2433 */ 2434 if (count > limit) { 2435 tsleep_interlock(&pmp->inmem_dirty_chains, 0); 2436 if (atomic_cmpset_int(&pmp->inmem_dirty_chains, 2437 waiting, 2438 waiting | HAMMER2_DIRTYCHAIN_WAITING)) { 2439 speedup_syncer(pmp->mp); 2440 tsleep(&pmp->inmem_dirty_chains, PINTERLOCKED, 2441 "chnmem", hz); 2442 } 2443 continue; /* loop on success or fail */ 2444 } 2445 2446 /* 2447 * Try to start an early flush before we are forced to block. 2448 */ 2449 if (count > limit * 7 / 10) 2450 speedup_syncer(pmp->mp); 2451 break; 2452 } 2453 } 2454 2455 void 2456 hammer2_pfs_memory_inc(hammer2_pfs_t *pmp) 2457 { 2458 if (pmp) { 2459 atomic_add_int(&pmp->inmem_dirty_chains, 1); 2460 } 2461 } 2462 2463 void 2464 hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp) 2465 { 2466 uint32_t waiting; 2467 2468 if (pmp == NULL) 2469 return; 2470 2471 for (;;) { 2472 waiting = pmp->inmem_dirty_chains; 2473 cpu_ccfence(); 2474 if (atomic_cmpset_int(&pmp->inmem_dirty_chains, 2475 waiting, 2476 (waiting - 1) & 2477 ~HAMMER2_DIRTYCHAIN_WAITING)) { 2478 break; 2479 } 2480 } 2481 2482 if (waiting & HAMMER2_DIRTYCHAIN_WAITING) 2483 wakeup(&pmp->inmem_dirty_chains); 2484 } 2485 2486 /* 2487 * Debugging 2488 */ 2489 void 2490 hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx) 2491 { 2492 hammer2_chain_t *scan; 2493 hammer2_chain_t *parent; 2494 2495 --*countp; 2496 if (*countp == 0) { 2497 kprintf("%*.*s...\n", tab, tab, ""); 2498 return; 2499 } 2500 if (*countp < 0) 2501 return; 2502 kprintf("%*.*s%c-chain %p.%d %016jx/%d mir=%016jx\n", 2503 tab, tab, "", pfx, 2504 chain, chain->bref.type, 2505 chain->bref.key, chain->bref.keybits, 2506 chain->bref.mirror_tid); 2507 2508 kprintf("%*.*s [%08x] (%s) refs=%d", 2509 tab, tab, "", 2510 chain->flags, 2511 ((chain->bref.type == HAMMER2_BREF_TYPE_INODE && 2512 chain->data) ? (char *)chain->data->ipdata.filename : "?"), 2513 chain->refs); 2514 2515 parent = chain->parent; 2516 if (parent) 2517 kprintf("\n%*.*s p=%p [pflags %08x prefs %d", 2518 tab, tab, "", 2519 parent, parent->flags, parent->refs); 2520 if (RB_EMPTY(&chain->core.rbtree)) { 2521 kprintf("\n"); 2522 } else { 2523 kprintf(" {\n"); 2524 RB_FOREACH(scan, hammer2_chain_tree, &chain->core.rbtree) 2525 hammer2_dump_chain(scan, tab + 4, countp, 'a'); 2526 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && chain->data) 2527 kprintf("%*.*s}(%s)\n", tab, tab, "", 2528 chain->data->ipdata.filename); 2529 else 2530 kprintf("%*.*s}\n", tab, tab, ""); 2531 } 2532 } 2533