1 /* 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2022 Tomohiro Kusumi <tkusumi@netbsd.org> 5 * Copyright (c) 2011-2023 The DragonFly Project. All rights reserved. 6 * 7 * This code is derived from software contributed to The DragonFly Project 8 * by Matthew Dillon <dillon@dragonflybsd.org> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 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 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 3. Neither the name of The DragonFly Project nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific, prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 27 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 28 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 30 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 31 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 32 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 34 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 /* 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/nlookup.h> 42 #include <sys/vnode.h> 43 #include <sys/mount.h> 44 #include <sys/fcntl.h> 45 #include <sys/vfsops.h> 46 #include <sys/sysctl.h> 47 #include <sys/socket.h> 48 #include <sys/objcache.h> 49 #include <sys/proc.h> 50 #include <sys/lock.h> 51 #include <sys/file.h> 52 */ 53 54 #include "hammer2.h" 55 56 TAILQ_HEAD(hammer2_mntlist, hammer2_dev); 57 static struct hammer2_mntlist hammer2_mntlist; 58 59 struct hammer2_pfslist hammer2_pfslist; 60 struct hammer2_pfslist hammer2_spmplist; 61 struct lock hammer2_mntlk; 62 63 int hammer2_supported_version = HAMMER2_VOL_VERSION_DEFAULT; 64 int hammer2_debug; 65 int hammer2_aux_flags; 66 int hammer2_xop_nthreads; 67 int hammer2_xop_sgroups; 68 int hammer2_xop_xgroups; 69 int hammer2_xop_xbase; 70 int hammer2_xop_mod; 71 long hammer2_debug_inode; 72 int hammer2_cluster_meta_read = 1; /* physical read-ahead */ 73 int hammer2_cluster_data_read = 4; /* physical read-ahead */ 74 int hammer2_cluster_write = 0; /* physical write clustering */ 75 int hammer2_dedup_enable = 1; 76 int hammer2_always_compress = 0; /* always try to compress */ 77 int hammer2_flush_pipe = 100; 78 int hammer2_dio_count; 79 int hammer2_dio_limit = 256; 80 int hammer2_bulkfree_tps = 5000; 81 int hammer2_spread_workers; 82 int hammer2_limit_saved_depth; 83 long hammer2_chain_allocs; 84 long hammer2_limit_saved_chains; 85 long hammer2_limit_dirty_chains; 86 long hammer2_limit_dirty_inodes; 87 long hammer2_count_modified_chains; 88 long hammer2_iod_file_read; 89 long hammer2_iod_meta_read; 90 long hammer2_iod_indr_read; 91 long hammer2_iod_fmap_read; 92 long hammer2_iod_volu_read; 93 long hammer2_iod_file_write; 94 long hammer2_iod_file_wembed; 95 long hammer2_iod_file_wzero; 96 long hammer2_iod_file_wdedup; 97 long hammer2_iod_meta_write; 98 long hammer2_iod_indr_write; 99 long hammer2_iod_fmap_write; 100 long hammer2_iod_volu_write; 101 static long hammer2_iod_inode_creates; 102 static long hammer2_iod_inode_deletes; 103 104 long hammer2_process_icrc32; 105 long hammer2_process_xxhash64; 106 107 int hz; 108 int ticks; 109 int64_t vnode_count; 110 111 MALLOC_DECLARE(M_HAMMER2_CBUFFER); 112 MALLOC_DEFINE(M_HAMMER2_CBUFFER, "HAMMER2-compbuffer", 113 "Buffer used for compression."); 114 115 MALLOC_DECLARE(M_HAMMER2_DEBUFFER); 116 MALLOC_DEFINE(M_HAMMER2_DEBUFFER, "HAMMER2-decompbuffer", 117 "Buffer used for decompression."); 118 119 SYSCTL_NODE(_vfs, OID_AUTO, hammer2, CTLFLAG_RW, 0, "HAMMER2 filesystem"); 120 121 SYSCTL_INT(_vfs_hammer2, OID_AUTO, supported_version, CTLFLAG_RD, 122 &hammer2_supported_version, 0, ""); 123 SYSCTL_INT(_vfs_hammer2, OID_AUTO, aux_flags, CTLFLAG_RW, 124 &hammer2_aux_flags, 0, ""); 125 SYSCTL_INT(_vfs_hammer2, OID_AUTO, debug, CTLFLAG_RW, 126 &hammer2_debug, 0, ""); 127 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, debug_inode, CTLFLAG_RW, 128 &hammer2_debug_inode, 0, ""); 129 SYSCTL_INT(_vfs_hammer2, OID_AUTO, spread_workers, CTLFLAG_RW, 130 &hammer2_spread_workers, 0, ""); 131 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_meta_read, CTLFLAG_RW, 132 &hammer2_cluster_meta_read, 0, ""); 133 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_data_read, CTLFLAG_RW, 134 &hammer2_cluster_data_read, 0, ""); 135 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_write, CTLFLAG_RW, 136 &hammer2_cluster_write, 0, ""); 137 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dedup_enable, CTLFLAG_RW, 138 &hammer2_dedup_enable, 0, ""); 139 SYSCTL_INT(_vfs_hammer2, OID_AUTO, always_compress, CTLFLAG_RW, 140 &hammer2_always_compress, 0, ""); 141 SYSCTL_INT(_vfs_hammer2, OID_AUTO, flush_pipe, CTLFLAG_RW, 142 &hammer2_flush_pipe, 0, ""); 143 SYSCTL_INT(_vfs_hammer2, OID_AUTO, bulkfree_tps, CTLFLAG_RW, 144 &hammer2_bulkfree_tps, 0, ""); 145 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_allocs, CTLFLAG_RD, 146 &hammer2_chain_allocs, 0, ""); 147 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, limit_saved_chains, CTLFLAG_RW, 148 &hammer2_limit_saved_chains, 0, ""); 149 SYSCTL_INT(_vfs_hammer2, OID_AUTO, limit_saved_depth, CTLFLAG_RW, 150 &hammer2_limit_saved_depth, 0, ""); 151 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, limit_dirty_chains, CTLFLAG_RW, 152 &hammer2_limit_dirty_chains, 0, ""); 153 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, limit_dirty_inodes, CTLFLAG_RW, 154 &hammer2_limit_dirty_inodes, 0, ""); 155 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, count_modified_chains, CTLFLAG_RD, 156 &hammer2_count_modified_chains, 0, ""); 157 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dio_count, CTLFLAG_RD, 158 &hammer2_dio_count, 0, ""); 159 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dio_limit, CTLFLAG_RW, 160 &hammer2_dio_limit, 0, ""); 161 162 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_read, CTLFLAG_RD, 163 &hammer2_iod_file_read, 0, ""); 164 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_read, CTLFLAG_RD, 165 &hammer2_iod_meta_read, 0, ""); 166 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_read, CTLFLAG_RD, 167 &hammer2_iod_indr_read, 0, ""); 168 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_read, CTLFLAG_RD, 169 &hammer2_iod_fmap_read, 0, ""); 170 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_read, CTLFLAG_RD, 171 &hammer2_iod_volu_read, 0, ""); 172 173 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_write, CTLFLAG_RD, 174 &hammer2_iod_file_write, 0, ""); 175 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wembed, CTLFLAG_RD, 176 &hammer2_iod_file_wembed, 0, ""); 177 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wzero, CTLFLAG_RD, 178 &hammer2_iod_file_wzero, 0, ""); 179 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wdedup, CTLFLAG_RD, 180 &hammer2_iod_file_wdedup, 0, ""); 181 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_write, CTLFLAG_RD, 182 &hammer2_iod_meta_write, 0, ""); 183 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_write, CTLFLAG_RD, 184 &hammer2_iod_indr_write, 0, ""); 185 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_write, CTLFLAG_RD, 186 &hammer2_iod_fmap_write, 0, ""); 187 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_write, CTLFLAG_RD, 188 &hammer2_iod_volu_write, 0, ""); 189 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_inode_creates, CTLFLAG_RD, 190 &hammer2_iod_inode_creates, 0, ""); 191 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_inode_deletes, CTLFLAG_RD, 192 &hammer2_iod_inode_deletes, 0, ""); 193 194 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, process_icrc32, CTLFLAG_RD, 195 &hammer2_process_icrc32, 0, ""); 196 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, process_xxhash64, CTLFLAG_RD, 197 &hammer2_process_xxhash64, 0, ""); 198 199 /* 200 static int hammer2_vfs_init(struct vfsconf *conf); 201 static int hammer2_vfs_uninit(struct vfsconf *vfsp); 202 static int hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data, 203 struct ucred *cred); 204 static int hammer2_remount(hammer2_dev_t *, struct mount *, char *, 205 struct ucred *); 206 */ 207 static int hammer2_recovery(hammer2_dev_t *hmp); 208 /* 209 static int hammer2_vfs_unmount(struct mount *mp, int mntflags); 210 static int hammer2_vfs_root(struct mount *mp, struct m_vnode **vpp); 211 */ 212 static int hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, 213 struct ucred *cred); 214 static int hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, 215 struct ucred *cred); 216 /* 217 static int hammer2_vfs_fhtovp(struct mount *mp, struct m_vnode *rootvp, 218 struct fid *fhp, struct m_vnode **vpp); 219 static int hammer2_vfs_vptofh(struct m_vnode *vp, struct fid *fhp); 220 static int hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 221 int *exflagsp, struct ucred **credanonp); 222 static int hammer2_vfs_modifying(struct mount *mp); 223 */ 224 225 static void hammer2_update_pmps(hammer2_dev_t *hmp); 226 227 static void hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp); 228 static void hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp, 229 hammer2_dev_t *hmp); 230 static int hammer2_fixup_pfses(hammer2_dev_t *hmp); 231 232 /* 233 * HAMMER2 vfs operations. 234 */ 235 /* 236 static struct vfsops hammer2_vfsops = { 237 .vfs_flags = 0, 238 .vfs_init = hammer2_vfs_init, 239 .vfs_uninit = hammer2_vfs_uninit, 240 .vfs_sync = hammer2_vfs_sync, 241 .vfs_mount = hammer2_vfs_mount, 242 .vfs_unmount = hammer2_vfs_unmount, 243 .vfs_root = hammer2_vfs_root, 244 .vfs_statfs = hammer2_vfs_statfs, 245 .vfs_statvfs = hammer2_vfs_statvfs, 246 .vfs_vget = hammer2_vfs_vget, 247 .vfs_vptofh = hammer2_vfs_vptofh, 248 .vfs_fhtovp = hammer2_vfs_fhtovp, 249 .vfs_checkexp = hammer2_vfs_checkexp, 250 .vfs_modifying = hammer2_vfs_modifying 251 }; 252 */ 253 254 MALLOC_DEFINE(M_HAMMER2, "HAMMER2-mount", ""); 255 256 VFS_SET(hammer2_vfsops, hammer2, VFCF_MPSAFE); 257 MODULE_VERSION(hammer2, 1); 258 259 int 260 hammer2_vfs_init(void) 261 { 262 /* 263 static struct objcache_malloc_args margs_read; 264 static struct objcache_malloc_args margs_write; 265 static struct objcache_malloc_args margs_vop; 266 */ 267 268 int error; 269 int mod; 270 271 error = 0; 272 kmalloc_raise_limit(M_HAMMER2, 0); /* unlimited */ 273 274 /* 275 * hammer2_xop_nthreads must be a multiple of ncpus, 276 * minimum 2 * ncpus. 277 */ 278 const int ncpus = 1; 279 mod = ncpus; 280 hammer2_xop_mod = mod; 281 hammer2_xop_nthreads = mod * 2; 282 /* 283 while (hammer2_xop_nthreads / mod < HAMMER2_XOPGROUPS_MIN || 284 hammer2_xop_nthreads < HAMMER2_XOPTHREADS_MIN) 285 { 286 hammer2_xop_nthreads += mod; 287 } 288 hammer2_xop_sgroups = hammer2_xop_nthreads / mod / 2; 289 hammer2_xop_xgroups = hammer2_xop_nthreads / mod - hammer2_xop_sgroups; 290 hammer2_xop_xbase = hammer2_xop_sgroups * mod; 291 */ 292 293 /* 294 * A large DIO cache is needed to retain dedup enablement masks. 295 * The bulkfree code clears related masks as part of the disk block 296 * recycling algorithm, preventing it from being used for a later 297 * dedup. 298 * 299 * NOTE: A large buffer cache can actually interfere with dedup 300 * operation because we dedup based on media physical buffers 301 * and not logical buffers. Try to make the DIO case large 302 * enough to avoid this problem, but also cap it. 303 */ 304 const long nbuf = 100000; /* XXX */ 305 hammer2_dio_limit = nbuf * 2; 306 if (hammer2_dio_limit > 100000) 307 hammer2_dio_limit = 100000; 308 309 if (HAMMER2_BLOCKREF_BYTES != sizeof(struct hammer2_blockref)) 310 error = EINVAL; 311 if (HAMMER2_INODE_BYTES != sizeof(struct hammer2_inode_data)) 312 error = EINVAL; 313 if (HAMMER2_VOLUME_BYTES != sizeof(struct hammer2_volume_data)) 314 error = EINVAL; 315 316 if (error) { 317 kprintf("HAMMER2 structure size mismatch; cannot continue.\n"); 318 return (error); 319 } 320 321 #if 0 322 margs_read.objsize = 65536; 323 margs_read.mtype = M_HAMMER2_DEBUFFER; 324 325 margs_write.objsize = 32768; 326 margs_write.mtype = M_HAMMER2_CBUFFER; 327 328 margs_vop.objsize = sizeof(hammer2_xop_t); 329 margs_vop.mtype = M_HAMMER2; 330 331 /* 332 * Note thaht for the XOPS cache we want backing store allocations 333 * to use M_ZERO. This is not allowed in objcache_get() (to avoid 334 * confusion), so use the backing store function that does it. This 335 * means that initial XOPS objects are zerod but REUSED objects are 336 * not. So we are responsible for cleaning the object up sufficiently 337 * for our needs before objcache_put()ing it back (typically just the 338 * FIFO indices). 339 */ 340 cache_buffer_read = objcache_create(margs_read.mtype->ks_shortdesc, 341 0, 1, NULL, NULL, NULL, 342 objcache_malloc_alloc, 343 objcache_malloc_free, 344 &margs_read); 345 cache_buffer_write = objcache_create(margs_write.mtype->ks_shortdesc, 346 0, 1, NULL, NULL, NULL, 347 objcache_malloc_alloc, 348 objcache_malloc_free, 349 &margs_write); 350 cache_xops = objcache_create(margs_vop.mtype->ks_shortdesc, 351 0, 1, NULL, NULL, NULL, 352 objcache_malloc_alloc_zero, 353 objcache_malloc_free, 354 &margs_vop); 355 #endif 356 357 358 lockinit(&hammer2_mntlk, "mntlk", 0, 0); 359 TAILQ_INIT(&hammer2_mntlist); 360 TAILQ_INIT(&hammer2_pfslist); 361 TAILQ_INIT(&hammer2_spmplist); 362 363 const int maxvnodes = 100000; /* XXX */ 364 hammer2_limit_dirty_chains = maxvnodes / 10; 365 if (hammer2_limit_dirty_chains > HAMMER2_LIMIT_DIRTY_CHAINS) 366 hammer2_limit_dirty_chains = HAMMER2_LIMIT_DIRTY_CHAINS; 367 if (hammer2_limit_dirty_chains < 1000) 368 hammer2_limit_dirty_chains = 1000; 369 370 hammer2_limit_dirty_inodes = maxvnodes / 25; 371 if (hammer2_limit_dirty_inodes < 100) 372 hammer2_limit_dirty_inodes = 100; 373 if (hammer2_limit_dirty_inodes > HAMMER2_LIMIT_DIRTY_INODES) 374 hammer2_limit_dirty_inodes = HAMMER2_LIMIT_DIRTY_INODES; 375 376 hammer2_limit_saved_chains = hammer2_limit_dirty_chains * 5; 377 378 return (error); 379 } 380 381 int 382 hammer2_vfs_uninit(void) 383 { 384 /* 385 objcache_destroy(cache_buffer_read); 386 objcache_destroy(cache_buffer_write); 387 objcache_destroy(cache_xops); 388 */ 389 return 0; 390 } 391 392 /* 393 * Core PFS allocator. Used to allocate or reference the pmp structure 394 * for PFS cluster mounts and the spmp structure for media (hmp) structures. 395 * The pmp can be passed in or loaded by this function using the chain and 396 * inode data. 397 * 398 * pmp->modify_tid tracks new modify_tid transaction ids for front-end 399 * transactions. Note that synchronization does not use this field. 400 * (typically frontend operations and synchronization cannot run on the 401 * same PFS node at the same time). 402 * 403 * XXX check locking 404 */ 405 hammer2_pfs_t * 406 hammer2_pfsalloc(hammer2_chain_t *chain, 407 const hammer2_inode_data_t *ripdata, 408 hammer2_dev_t *force_local) 409 { 410 hammer2_pfs_t *pmp; 411 hammer2_inode_t *iroot; 412 int count; 413 int i; 414 int j; 415 416 pmp = NULL; 417 418 /* 419 * Locate or create the PFS based on the cluster id. If ripdata 420 * is NULL this is a spmp which is unique and is always allocated. 421 * 422 * If the device is mounted in local mode all PFSs are considered 423 * independent and not part of any cluster (for debugging only). 424 */ 425 if (ripdata) { 426 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) { 427 if (force_local != pmp->force_local) 428 continue; 429 if (force_local == NULL && 430 bcmp(&pmp->pfs_clid, &ripdata->meta.pfs_clid, 431 sizeof(pmp->pfs_clid)) == 0) { 432 break; 433 } else if (force_local && pmp->pfs_names[0] && 434 strcmp(pmp->pfs_names[0], (const char *)ripdata->filename) == 0) { 435 break; 436 } 437 } 438 } 439 440 if (pmp == NULL) { 441 pmp = kmalloc(sizeof(*pmp), M_HAMMER2, M_WAITOK | M_ZERO); 442 pmp->force_local = force_local; 443 hammer2_trans_manage_init(pmp); 444 kmalloc_create_obj(&pmp->minode, "HAMMER2-inodes", 445 sizeof(struct hammer2_inode)); 446 lockinit(&pmp->lock, "pfslk", 0, 0); 447 hammer2_spin_init(&pmp->blockset_spin, "h2blkset"); 448 hammer2_inum_hash_init(pmp); 449 hammer2_spin_init(&pmp->xop_spin, "h2xop"); 450 TAILQ_INIT(&pmp->syncq); 451 TAILQ_INIT(&pmp->depq); 452 TAILQ_INIT(&pmp->recq); 453 hammer2_spin_init(&pmp->list_spin, "h2pfsalloc_list"); 454 455 /* 456 * Save the last media transaction id for the flusher. Set 457 * initial 458 */ 459 if (ripdata) { 460 pmp->pfs_clid = ripdata->meta.pfs_clid; 461 TAILQ_INSERT_TAIL(&hammer2_pfslist, pmp, mntentry); 462 } else { 463 pmp->flags |= HAMMER2_PMPF_SPMP; 464 TAILQ_INSERT_TAIL(&hammer2_spmplist, pmp, mntentry); 465 } 466 467 /* 468 * The synchronization thread may start too early, make 469 * sure it stays frozen until we are ready to let it go. 470 * XXX 471 */ 472 /* 473 pmp->primary_thr.flags = HAMMER2_THREAD_FROZEN | 474 HAMMER2_THREAD_REMASTER; 475 */ 476 } 477 478 /* 479 * Create the PFS's root inode and any missing XOP helper threads. 480 */ 481 if ((iroot = pmp->iroot) == NULL) { 482 iroot = hammer2_inode_get(pmp, NULL, 1, -1); 483 if (ripdata) 484 iroot->meta = ripdata->meta; 485 pmp->iroot = iroot; 486 hammer2_inode_ref(iroot); 487 hammer2_inode_unlock(iroot); 488 } 489 490 /* 491 * Stop here if no chain is passed in. 492 */ 493 if (chain == NULL) 494 goto done; 495 496 /* 497 * When a chain is passed in we must add it to the PFS's root 498 * inode, update pmp->pfs_types[], and update the syncronization 499 * threads. 500 * 501 * When forcing local mode, mark the PFS as a MASTER regardless. 502 * 503 * At the moment empty spots can develop due to removals or failures. 504 * Ultimately we want to re-fill these spots but doing so might 505 * confused running code. XXX 506 */ 507 hammer2_inode_ref(iroot); 508 hammer2_mtx_ex(&iroot->lock); 509 j = iroot->cluster.nchains; 510 511 if (j == HAMMER2_MAXCLUSTER) { 512 kprintf("hammer2_pfsalloc: cluster full!\n"); 513 /* XXX fatal error? */ 514 } else { 515 KKASSERT(chain->pmp == NULL); 516 chain->pmp = pmp; 517 hammer2_chain_ref(chain); 518 iroot->cluster.array[j].chain = chain; 519 if (force_local) 520 pmp->pfs_types[j] = HAMMER2_PFSTYPE_MASTER; 521 else 522 pmp->pfs_types[j] = ripdata->meta.pfs_type; 523 pmp->pfs_names[j] = kstrdup((const char *)ripdata->filename, M_HAMMER2); 524 pmp->pfs_hmps[j] = chain->hmp; 525 hammer2_spin_ex(&pmp->blockset_spin); 526 pmp->pfs_iroot_blocksets[j] = chain->data->ipdata.u.blockset; 527 hammer2_spin_unex(&pmp->blockset_spin); 528 529 /* 530 * If the PFS is already mounted we must account 531 * for the mount_count here. 532 */ 533 if (pmp->mp) 534 ++chain->hmp->mount_count; 535 536 /* 537 * May have to fixup dirty chain tracking. Previous 538 * pmp was NULL so nothing to undo. 539 */ 540 if (chain->flags & HAMMER2_CHAIN_MODIFIED) 541 hammer2_pfs_memory_inc(pmp); 542 ++j; 543 } 544 iroot->cluster.nchains = j; 545 546 /* 547 * Update nmasters from any PFS inode which is part of the cluster. 548 * It is possible that this will result in a value which is too 549 * high. MASTER PFSs are authoritative for pfs_nmasters and will 550 * override this value later on. 551 * 552 * (This informs us of masters that might not currently be 553 * discoverable by this mount). 554 */ 555 if (ripdata && pmp->pfs_nmasters < ripdata->meta.pfs_nmasters) { 556 pmp->pfs_nmasters = ripdata->meta.pfs_nmasters; 557 } 558 559 /* 560 * Count visible masters. Masters are usually added with 561 * ripdata->meta.pfs_nmasters set to 1. This detects when there 562 * are more (XXX and must update the master inodes). 563 */ 564 count = 0; 565 for (i = 0; i < iroot->cluster.nchains; ++i) { 566 if (pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) 567 ++count; 568 } 569 if (pmp->pfs_nmasters < count) 570 pmp->pfs_nmasters = count; 571 572 /* 573 * Create missing synchronization and support threads. 574 * 575 * Single-node masters (including snapshots) have nothing to 576 * synchronize and do not require this thread. 577 * 578 * Multi-node masters or any number of soft masters, slaves, copy, 579 * or other PFS types need the thread. 580 * 581 * Each thread is responsible for its particular cluster index. 582 * We use independent threads so stalls or mismatches related to 583 * any given target do not affect other targets. 584 */ 585 for (i = 0; i < iroot->cluster.nchains; ++i) { 586 /* 587 * Single-node masters (including snapshots) have nothing 588 * to synchronize and will make direct xops support calls, 589 * thus they do not require this thread. 590 * 591 * Note that there can be thousands of snapshots. We do not 592 * want to create thousands of threads. 593 */ 594 if (pmp->pfs_nmasters <= 1 && 595 pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) { 596 continue; 597 } 598 599 /* 600 * Sync support thread 601 */ 602 /* 603 if (pmp->sync_thrs[i].td == NULL) { 604 hammer2_thr_create(&pmp->sync_thrs[i], pmp, NULL, 605 "h2nod", i, -1, 606 hammer2_primary_sync_thread); 607 } 608 */ 609 } 610 611 /* 612 * Create missing Xop threads 613 * 614 * NOTE: We create helper threads for all mounted PFSs or any 615 * PFSs with 2+ nodes (so the sync thread can update them, 616 * even if not mounted). 617 */ 618 if (pmp->mp || iroot->cluster.nchains >= 2) 619 hammer2_xop_helper_create(pmp); 620 621 hammer2_mtx_unlock(&iroot->lock); 622 hammer2_inode_drop(iroot); 623 done: 624 return pmp; 625 } 626 627 /* 628 * Deallocate an element of a probed PFS. If destroying and this is a 629 * MASTER, adjust nmasters. 630 * 631 * This function does not physically destroy the PFS element in its device 632 * under the super-root (see hammer2_ioctl_pfs_delete()). 633 */ 634 void 635 hammer2_pfsdealloc(hammer2_pfs_t *pmp, int clindex, int destroying) 636 { 637 hammer2_inode_t *iroot; 638 hammer2_chain_t *chain; 639 int j; 640 641 /* 642 * Cleanup our reference on iroot. iroot is (should) not be needed 643 * by the flush code. 644 */ 645 iroot = pmp->iroot; 646 if (iroot) { 647 /* 648 * Stop synchronizing 649 * 650 * XXX flush after acquiring the iroot lock. 651 * XXX clean out the cluster index from all inode structures. 652 */ 653 hammer2_thr_delete(&pmp->sync_thrs[clindex]); 654 655 /* 656 * Remove the cluster index from the group. If destroying 657 * the PFS and this is a master, adjust pfs_nmasters. 658 */ 659 hammer2_mtx_ex(&iroot->lock); 660 chain = iroot->cluster.array[clindex].chain; 661 iroot->cluster.array[clindex].chain = NULL; 662 663 switch(pmp->pfs_types[clindex]) { 664 case HAMMER2_PFSTYPE_MASTER: 665 if (destroying && pmp->pfs_nmasters > 0) 666 --pmp->pfs_nmasters; 667 /* XXX adjust ripdata->meta.pfs_nmasters */ 668 break; 669 default: 670 break; 671 } 672 pmp->pfs_types[clindex] = HAMMER2_PFSTYPE_NONE; 673 674 hammer2_mtx_unlock(&iroot->lock); 675 676 /* 677 * Release the chain. 678 */ 679 if (chain) { 680 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE); 681 hammer2_chain_drop(chain); 682 } 683 684 /* 685 * Terminate all XOP threads for the cluster index. 686 */ 687 if (pmp->xop_groups) { 688 for (j = 0; j < hammer2_xop_nthreads; ++j) { 689 hammer2_thr_delete( 690 &pmp->xop_groups[j].thrs[clindex]); 691 } 692 } 693 } 694 } 695 696 /* 697 * Destroy a PFS, typically only occurs after the last mount on a device 698 * has gone away. 699 */ 700 static void 701 hammer2_pfsfree(hammer2_pfs_t *pmp) 702 { 703 hammer2_inode_t *iroot, *ip; 704 hammer2_chain_t *chain; 705 int chains_still_present = 0; 706 int i; 707 //int j; 708 709 /* 710 * Cleanup our reference on iroot. iroot is (should) not be needed 711 * by the flush code. 712 */ 713 if (pmp->flags & HAMMER2_PMPF_SPMP) 714 TAILQ_REMOVE(&hammer2_spmplist, pmp, mntentry); 715 else 716 TAILQ_REMOVE(&hammer2_pfslist, pmp, mntentry); 717 718 /* 719 * Clean up iroot 720 */ 721 iroot = pmp->iroot; 722 if (iroot) { 723 for (i = 0; i < iroot->cluster.nchains; ++i) { 724 /* 725 hammer2_thr_delete(&pmp->sync_thrs[i]); 726 if (pmp->xop_groups) { 727 for (j = 0; j < hammer2_xop_nthreads; ++j) 728 hammer2_thr_delete( 729 &pmp->xop_groups[j].thrs[i]); 730 } 731 */ 732 chain = iroot->cluster.array[i].chain; 733 if (chain && !RB_EMPTY(&chain->core.rbtree)) { 734 kprintf("hammer2: Warning pmp %p still " 735 "has active chains\n", pmp); 736 chains_still_present = 1; 737 } 738 } 739 KASSERT(iroot->refs == 1, 740 ("PMP->IROOT %p REFS WRONG %d", iroot, iroot->refs)); 741 742 /* ref for iroot */ 743 hammer2_inode_drop(iroot); 744 pmp->iroot = NULL; 745 } 746 747 /* 748 * Free remaining pmp resources 749 */ 750 if (chains_still_present) { 751 kprintf("hammer2: cannot free pmp %p, still in use\n", pmp); 752 } else { 753 /* 754 * Free inode in reclaim queue. 755 */ 756 while ((ip = TAILQ_FIRST(&pmp->recq)) != NULL) { 757 TAILQ_REMOVE(&pmp->recq, ip, recq_entry); 758 /* 759 * VOP_RECLAIM is currently unused, 760 * so directly free vnode before inode. 761 */ 762 if (ip->vp) { 763 if (ip->vp->v_malloced) 764 freevnode(ip->vp); 765 } else { 766 /* PFS inode ? */ 767 } 768 kfree_obj(ip, pmp->minode); 769 atomic_add_long(&pmp->inmem_inodes, -1); 770 } 771 assert(TAILQ_EMPTY(&pmp->recq)); 772 assert(pmp->inmem_inodes == 0); 773 774 kmalloc_destroy_obj(&pmp->minode); 775 kfree(pmp, M_HAMMER2); 776 } 777 } 778 779 /* 780 * Remove all references to hmp from the pfs list. Any PFS which becomes 781 * empty is terminated and freed. 782 * 783 * XXX inefficient. 784 */ 785 static void 786 hammer2_pfsfree_scan(hammer2_dev_t *hmp, int which) 787 { 788 hammer2_pfs_t *pmp; 789 hammer2_inode_t *iroot; 790 hammer2_chain_t *rchain; 791 int i; 792 //int j; 793 struct hammer2_pfslist *wlist; 794 795 if (which == 0) 796 wlist = &hammer2_pfslist; 797 else 798 wlist = &hammer2_spmplist; 799 again: 800 TAILQ_FOREACH(pmp, wlist, mntentry) { 801 if ((iroot = pmp->iroot) == NULL) 802 continue; 803 804 /* 805 * Determine if this PFS is affected. If it is we must 806 * freeze all management threads and lock its iroot. 807 * 808 * Freezing a management thread forces it idle, operations 809 * in-progress will be aborted and it will have to start 810 * over again when unfrozen, or exit if told to exit. 811 */ 812 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 813 if (pmp->pfs_hmps[i] == hmp) 814 break; 815 } 816 if (i == HAMMER2_MAXCLUSTER) 817 continue; 818 819 hammer2_vfs_sync_pmp(pmp, MNT_WAIT); 820 821 /* 822 * Make sure all synchronization threads are locked 823 * down. 824 */ 825 /* 826 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 827 if (pmp->pfs_hmps[i] == NULL) 828 continue; 829 hammer2_thr_freeze_async(&pmp->sync_thrs[i]); 830 if (pmp->xop_groups) { 831 for (j = 0; j < hammer2_xop_nthreads; ++j) { 832 hammer2_thr_freeze_async( 833 &pmp->xop_groups[j].thrs[i]); 834 } 835 } 836 } 837 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 838 if (pmp->pfs_hmps[i] == NULL) 839 continue; 840 hammer2_thr_freeze(&pmp->sync_thrs[i]); 841 if (pmp->xop_groups) { 842 for (j = 0; j < hammer2_xop_nthreads; ++j) { 843 hammer2_thr_freeze( 844 &pmp->xop_groups[j].thrs[i]); 845 } 846 } 847 } 848 */ 849 850 /* 851 * Lock the inode and clean out matching chains. 852 * Note that we cannot use hammer2_inode_lock_*() 853 * here because that would attempt to validate the 854 * cluster that we are in the middle of ripping 855 * apart. 856 * 857 * WARNING! We are working directly on the inodes 858 * embedded cluster. 859 */ 860 hammer2_mtx_ex(&iroot->lock); 861 862 /* 863 * Remove the chain from matching elements of the PFS. 864 */ 865 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 866 if (pmp->pfs_hmps[i] != hmp) 867 continue; 868 /* 869 hammer2_thr_delete(&pmp->sync_thrs[i]); 870 if (pmp->xop_groups) { 871 for (j = 0; j < hammer2_xop_nthreads; ++j) { 872 hammer2_thr_delete( 873 &pmp->xop_groups[j].thrs[i]); 874 } 875 } 876 */ 877 rchain = iroot->cluster.array[i].chain; 878 iroot->cluster.array[i].chain = NULL; 879 pmp->pfs_types[i] = HAMMER2_PFSTYPE_NONE; 880 if (pmp->pfs_names[i]) { 881 kfree(pmp->pfs_names[i], M_HAMMER2); 882 pmp->pfs_names[i] = NULL; 883 } 884 if (rchain) { 885 hammer2_chain_drop(rchain); 886 /* focus hint */ 887 if (iroot->cluster.focus == rchain) 888 iroot->cluster.focus = NULL; 889 } 890 pmp->pfs_hmps[i] = NULL; 891 } 892 hammer2_mtx_unlock(&iroot->lock); 893 894 /* 895 * Cleanup trailing chains. Gaps may remain. 896 */ 897 for (i = HAMMER2_MAXCLUSTER - 1; i >= 0; --i) { 898 if (pmp->pfs_hmps[i]) 899 break; 900 } 901 iroot->cluster.nchains = i + 1; 902 903 /* 904 * If the PMP has no elements remaining we can destroy it. 905 * (this will transition management threads from frozen->exit). 906 */ 907 if (iroot->cluster.nchains == 0) { 908 /* 909 * If this was the hmp's spmp, we need to clean 910 * a little more stuff out. 911 */ 912 if (hmp->spmp == pmp) { 913 hmp->spmp = NULL; 914 hmp->vchain.pmp = NULL; 915 hmp->fchain.pmp = NULL; 916 } 917 918 /* 919 * Free the pmp and restart the loop 920 */ 921 KKASSERT(TAILQ_EMPTY(&pmp->syncq)); 922 KKASSERT(TAILQ_EMPTY(&pmp->depq)); 923 hammer2_pfsfree(pmp); 924 goto again; 925 } 926 927 /* 928 * If elements still remain we need to set the REMASTER 929 * flag and unfreeze it. 930 */ 931 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 932 if (pmp->pfs_hmps[i] == NULL) 933 continue; 934 /* 935 hammer2_thr_remaster(&pmp->sync_thrs[i]); 936 hammer2_thr_unfreeze(&pmp->sync_thrs[i]); 937 if (pmp->xop_groups) { 938 for (j = 0; j < hammer2_xop_nthreads; ++j) { 939 hammer2_thr_remaster( 940 &pmp->xop_groups[j].thrs[i]); 941 hammer2_thr_unfreeze( 942 &pmp->xop_groups[j].thrs[i]); 943 } 944 } 945 */ 946 } 947 } 948 } 949 950 /* 951 * Mount or remount HAMMER2 fileystem from physical media 952 * 953 * mountroot 954 * mp mount point structure 955 * path NULL 956 * data <unused> 957 * cred <unused> 958 * 959 * mount 960 * mp mount point structure 961 * path path to mount point 962 * data pointer to argument structure in user space 963 * volume volume path (device@LABEL form) 964 * hflags user mount flags 965 * cred user credentials 966 * 967 * RETURNS: 0 Success 968 * !0 error number 969 */ 970 int 971 hammer2_vfs_mount(struct m_vnode *makefs_devvp, struct mount *mp, 972 const char *label, const struct hammer2_mount_info *mi) 973 { 974 struct hammer2_mount_info info = *mi; 975 hammer2_pfs_t *pmp; 976 hammer2_pfs_t *spmp; 977 hammer2_dev_t *hmp, *hmp_tmp; 978 hammer2_dev_t *force_local; 979 hammer2_key_t key_next; 980 hammer2_key_t key_dummy; 981 hammer2_key_t lhc; 982 hammer2_chain_t *parent; 983 hammer2_chain_t *chain; 984 const hammer2_inode_data_t *ripdata; 985 hammer2_devvp_list_t devvpl; 986 hammer2_devvp_t *e, *e_tmp; 987 char *devstr; 988 int ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 989 int error; 990 int i; 991 992 hmp = NULL; 993 pmp = NULL; 994 devstr = NULL; 995 996 kprintf("hammer2_mount: device=\"%s\" label=\"%s\" rdonly=%d\n", 997 devstr, label, ronly); 998 999 /* 1000 * Initialize all device vnodes. 1001 */ 1002 TAILQ_INIT(&devvpl); 1003 error = hammer2_init_devvp(makefs_devvp, &devvpl); 1004 if (error) { 1005 kprintf("hammer2: failed to initialize devvp in %s\n", devstr); 1006 hammer2_cleanup_devvp(&devvpl); 1007 return error; 1008 } 1009 1010 /* 1011 * Determine if the device has already been mounted. After this 1012 * check hmp will be non-NULL if we are doing the second or more 1013 * hammer2 mounts from the same device. 1014 */ 1015 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 1016 if (!TAILQ_EMPTY(&devvpl)) { 1017 /* 1018 * Match the device. Due to the way devfs works, 1019 * we may not be able to directly match the vnode pointer, 1020 * so also check to see if the underlying device matches. 1021 */ 1022 TAILQ_FOREACH(hmp_tmp, &hammer2_mntlist, mntentry) { 1023 TAILQ_FOREACH(e_tmp, &hmp_tmp->devvpl, entry) { 1024 int devvp_found = 0; 1025 TAILQ_FOREACH(e, &devvpl, entry) { 1026 KKASSERT(e->devvp); 1027 if (e_tmp->devvp == e->devvp) 1028 devvp_found = 1; 1029 /* 1030 if (e_tmp->devvp->v_rdev && 1031 e_tmp->devvp->v_rdev == e->devvp->v_rdev) 1032 devvp_found = 1; 1033 */ 1034 } 1035 if (!devvp_found) 1036 goto next_hmp; 1037 } 1038 hmp = hmp_tmp; 1039 kprintf("hammer2_mount: hmp=%p matched\n", hmp); 1040 break; 1041 next_hmp: 1042 continue; 1043 } 1044 1045 /* 1046 * If no match this may be a fresh H2 mount, make sure 1047 * the device is not mounted on anything else. 1048 */ 1049 if (hmp == NULL) { 1050 TAILQ_FOREACH(e, &devvpl, entry) { 1051 struct m_vnode *devvp = e->devvp; 1052 KKASSERT(devvp); 1053 error = vfs_mountedon(devvp); 1054 if (error) { 1055 kprintf("hammer2_mount: %s mounted %d\n", 1056 e->path, error); 1057 hammer2_cleanup_devvp(&devvpl); 1058 lockmgr(&hammer2_mntlk, LK_RELEASE); 1059 return error; 1060 } 1061 } 1062 } 1063 } else { 1064 /* 1065 * Match the label to a pmp already probed. 1066 */ 1067 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) { 1068 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) { 1069 if (pmp->pfs_names[i] && 1070 strcmp(pmp->pfs_names[i], label) == 0) { 1071 hmp = pmp->pfs_hmps[i]; 1072 break; 1073 } 1074 } 1075 if (hmp) 1076 break; 1077 } 1078 if (hmp == NULL) { 1079 kprintf("hammer2_mount: PFS label \"%s\" not found\n", 1080 label); 1081 hammer2_cleanup_devvp(&devvpl); 1082 lockmgr(&hammer2_mntlk, LK_RELEASE); 1083 return ENOENT; 1084 } 1085 } 1086 1087 /* 1088 * Open the device if this isn't a secondary mount and construct 1089 * the H2 device mount (hmp). 1090 */ 1091 if (hmp == NULL) { 1092 hammer2_chain_t *schain; 1093 hammer2_xop_head_t xop; 1094 1095 /* 1096 * Now open the device 1097 */ 1098 KKASSERT(!TAILQ_EMPTY(&devvpl)); 1099 error = hammer2_open_devvp(&devvpl, ronly); 1100 if (error) { 1101 hammer2_close_devvp(&devvpl, ronly); 1102 hammer2_cleanup_devvp(&devvpl); 1103 lockmgr(&hammer2_mntlk, LK_RELEASE); 1104 return error; 1105 } 1106 1107 /* 1108 * Construct volumes and link with device vnodes. 1109 */ 1110 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO); 1111 hmp->devvp = NULL; 1112 error = hammer2_init_vfsvolumes(mp, &devvpl, hmp->volumes, 1113 &hmp->voldata, &hmp->volhdrno, 1114 &hmp->devvp); 1115 if (error) { 1116 hammer2_close_devvp(&devvpl, ronly); 1117 hammer2_cleanup_devvp(&devvpl); 1118 lockmgr(&hammer2_mntlk, LK_RELEASE); 1119 kfree(hmp, M_HAMMER2); 1120 return error; 1121 } 1122 if (!hmp->devvp) { 1123 kprintf("hammer2: failed to initialize root volume\n"); 1124 hammer2_unmount_helper(mp, NULL, hmp); 1125 lockmgr(&hammer2_mntlk, LK_RELEASE); 1126 hammer2_vfs_unmount(mp, MNT_FORCE); 1127 return EINVAL; 1128 } 1129 1130 ksnprintf(hmp->devrepname, sizeof(hmp->devrepname), "%s", devstr); 1131 hmp->ronly = ronly; 1132 hmp->hflags = info.hflags & HMNT2_DEVFLAGS; 1133 kmalloc_create_obj(&hmp->mchain, "HAMMER2-chains", 1134 sizeof(struct hammer2_chain)); 1135 kmalloc_create_obj(&hmp->mio, "HAMMER2-dio", 1136 sizeof(struct hammer2_io)); 1137 kmalloc_create(&hmp->mmsg, "HAMMER2-msg"); 1138 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry); 1139 hammer2_io_hash_init(hmp); 1140 hammer2_spin_init(&hmp->list_spin, "h2mount_list"); 1141 1142 lockinit(&hmp->vollk, "h2vol", 0, 0); 1143 lockinit(&hmp->bulklk, "h2bulk", 0, 0); 1144 lockinit(&hmp->bflock, "h2bflk", 0, 0); 1145 1146 /* 1147 * vchain setup. vchain.data is embedded. 1148 * vchain.refs is initialized and will never drop to 0. 1149 */ 1150 hmp->vchain.hmp = hmp; 1151 hmp->vchain.refs = 1; 1152 hmp->vchain.data = (void *)&hmp->voldata; 1153 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME; 1154 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX; 1155 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid; 1156 hammer2_chain_init(&hmp->vchain); 1157 1158 /* 1159 * fchain setup. fchain.data is embedded. 1160 * fchain.refs is initialized and will never drop to 0. 1161 * 1162 * The data is not used but needs to be initialized to 1163 * pass assertion muster. We use this chain primarily 1164 * as a placeholder for the freemap's top-level radix tree 1165 * so it does not interfere with the volume's topology 1166 * radix tree. 1167 */ 1168 hmp->fchain.hmp = hmp; 1169 hmp->fchain.refs = 1; 1170 hmp->fchain.data = (void *)&hmp->voldata.freemap_blockset; 1171 hmp->fchain.bref.type = HAMMER2_BREF_TYPE_FREEMAP; 1172 hmp->fchain.bref.data_off = 0 | HAMMER2_PBUFRADIX; 1173 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid; 1174 hmp->fchain.bref.methods = 1175 HAMMER2_ENC_CHECK(HAMMER2_CHECK_FREEMAP) | 1176 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE); 1177 hammer2_chain_init(&hmp->fchain); 1178 1179 /* 1180 * Initialize volume header related fields. 1181 */ 1182 KKASSERT(hmp->voldata.magic == HAMMER2_VOLUME_ID_HBO || 1183 hmp->voldata.magic == HAMMER2_VOLUME_ID_ABO); 1184 hmp->volsync = hmp->voldata; 1185 hmp->free_reserved = hmp->voldata.allocator_size / 20; 1186 /* 1187 * Must use hmp instead of volume header for these two 1188 * in order to handle volume versions transparently. 1189 */ 1190 if (hmp->voldata.version >= HAMMER2_VOL_VERSION_MULTI_VOLUMES) { 1191 hmp->nvolumes = hmp->voldata.nvolumes; 1192 hmp->total_size = hmp->voldata.total_size; 1193 } else { 1194 hmp->nvolumes = 1; 1195 hmp->total_size = hmp->voldata.volu_size; 1196 } 1197 KKASSERT(hmp->nvolumes > 0); 1198 1199 /* 1200 * Move devvpl entries to hmp. 1201 */ 1202 TAILQ_INIT(&hmp->devvpl); 1203 while ((e = TAILQ_FIRST(&devvpl)) != NULL) { 1204 TAILQ_REMOVE(&devvpl, e, entry); 1205 TAILQ_INSERT_TAIL(&hmp->devvpl, e, entry); 1206 } 1207 KKASSERT(TAILQ_EMPTY(&devvpl)); 1208 KKASSERT(!TAILQ_EMPTY(&hmp->devvpl)); 1209 1210 /* 1211 * Really important to get these right or the flush and 1212 * teardown code will get confused. 1213 */ 1214 hmp->spmp = hammer2_pfsalloc(NULL, NULL, NULL); 1215 spmp = hmp->spmp; 1216 spmp->pfs_hmps[0] = hmp; 1217 1218 /* 1219 * Dummy-up vchain and fchain's modify_tid. mirror_tid 1220 * is inherited from the volume header. 1221 */ 1222 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid; 1223 hmp->vchain.bref.modify_tid = hmp->vchain.bref.mirror_tid; 1224 hmp->vchain.pmp = spmp; 1225 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid; 1226 hmp->fchain.bref.modify_tid = hmp->fchain.bref.mirror_tid; 1227 hmp->fchain.pmp = spmp; 1228 1229 /* 1230 * First locate the super-root inode, which is key 0 1231 * relative to the volume header's blockset. 1232 * 1233 * Then locate the root inode by scanning the directory keyspace 1234 * represented by the label. 1235 */ 1236 parent = hammer2_chain_lookup_init(&hmp->vchain, 0); 1237 schain = hammer2_chain_lookup(&parent, &key_dummy, 1238 HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY, 1239 &error, 0); 1240 hammer2_chain_lookup_done(parent); 1241 if (schain == NULL) { 1242 kprintf("hammer2_mount: invalid super-root\n"); 1243 hammer2_unmount_helper(mp, NULL, hmp); 1244 lockmgr(&hammer2_mntlk, LK_RELEASE); 1245 hammer2_vfs_unmount(mp, MNT_FORCE); 1246 return EINVAL; 1247 } 1248 if (schain->error) { 1249 kprintf("hammer2_mount: error %s reading super-root\n", 1250 hammer2_error_str(schain->error)); 1251 hammer2_chain_unlock(schain); 1252 hammer2_chain_drop(schain); 1253 schain = NULL; 1254 hammer2_unmount_helper(mp, NULL, hmp); 1255 lockmgr(&hammer2_mntlk, LK_RELEASE); 1256 hammer2_vfs_unmount(mp, MNT_FORCE); 1257 return EINVAL; 1258 } 1259 1260 /* 1261 * The super-root always uses an inode_tid of 1 when 1262 * creating PFSs. 1263 */ 1264 spmp->inode_tid = 1; 1265 spmp->modify_tid = schain->bref.modify_tid + 1; 1266 1267 /* 1268 * Sanity-check schain's pmp and finish initialization. 1269 * Any chain belonging to the super-root topology should 1270 * have a NULL pmp (not even set to spmp). 1271 */ 1272 ripdata = &schain->data->ipdata; 1273 KKASSERT(schain->pmp == NULL); 1274 spmp->pfs_clid = ripdata->meta.pfs_clid; 1275 1276 /* 1277 * Replace the dummy spmp->iroot with a real one. It's 1278 * easier to just do a wholesale replacement than to try 1279 * to update the chain and fixup the iroot fields. 1280 * 1281 * The returned inode is locked with the supplied cluster. 1282 */ 1283 hammer2_dummy_xop_from_chain(&xop, schain); 1284 hammer2_inode_drop(spmp->iroot); 1285 spmp->iroot = hammer2_inode_get(spmp, &xop, -1, -1); 1286 spmp->spmp_hmp = hmp; 1287 spmp->pfs_types[0] = ripdata->meta.pfs_type; 1288 spmp->pfs_hmps[0] = hmp; 1289 hammer2_inode_ref(spmp->iroot); 1290 hammer2_inode_unlock(spmp->iroot); 1291 hammer2_cluster_unlock(&xop.cluster); 1292 hammer2_chain_drop(schain); 1293 /* do not call hammer2_cluster_drop() on an embedded cluster */ 1294 schain = NULL; /* now invalid */ 1295 /* leave spmp->iroot with one ref */ 1296 1297 if (!hmp->ronly) { 1298 error = hammer2_recovery(hmp); 1299 if (error == 0) 1300 error |= hammer2_fixup_pfses(hmp); 1301 /* XXX do something with error */ 1302 } 1303 hammer2_update_pmps(hmp); 1304 hammer2_iocom_init(hmp); 1305 hammer2_bulkfree_init(hmp); 1306 1307 /* 1308 * Ref the cluster management messaging descriptor. The mount 1309 * program deals with the other end of the communications pipe. 1310 * 1311 * Root mounts typically do not supply one. 1312 */ 1313 /* 1314 if (info.cluster_fd >= 0) { 1315 fp = holdfp(curthread, info.cluster_fd, -1); 1316 if (fp) { 1317 hammer2_cluster_reconnect(hmp, fp); 1318 } else { 1319 kprintf("hammer2_mount: bad cluster_fd!\n"); 1320 } 1321 } 1322 */ 1323 } else { 1324 /* hmp->devvp_list is already constructed. */ 1325 hammer2_cleanup_devvp(&devvpl); 1326 spmp = hmp->spmp; 1327 if (info.hflags & HMNT2_DEVFLAGS) { 1328 kprintf("hammer2_mount: Warning: mount flags pertaining " 1329 "to the whole device may only be specified " 1330 "on the first mount of the device: %08x\n", 1331 info.hflags & HMNT2_DEVFLAGS); 1332 } 1333 } 1334 1335 /* 1336 * Force local mount (disassociate all PFSs from their clusters). 1337 * Used primarily for debugging. 1338 */ 1339 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL; 1340 1341 /* 1342 * Lookup the mount point under the media-localized super-root. 1343 * Scanning hammer2_pfslist doesn't help us because it represents 1344 * PFS cluster ids which can aggregate several named PFSs together. 1345 * 1346 * cluster->pmp will incorrectly point to spmp and must be fixed 1347 * up later on. 1348 */ 1349 hammer2_inode_lock(spmp->iroot, 0); 1350 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS); 1351 lhc = hammer2_dirhash(label, strlen(label)); 1352 chain = hammer2_chain_lookup(&parent, &key_next, 1353 lhc, lhc + HAMMER2_DIRHASH_LOMASK, 1354 &error, 0); 1355 while (chain) { 1356 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && 1357 strcmp(label, (char *)chain->data->ipdata.filename) == 0) { 1358 break; 1359 } 1360 chain = hammer2_chain_next(&parent, chain, &key_next, 1361 key_next, 1362 lhc + HAMMER2_DIRHASH_LOMASK, 1363 &error, 0); 1364 } 1365 if (parent) { 1366 hammer2_chain_unlock(parent); 1367 hammer2_chain_drop(parent); 1368 } 1369 hammer2_inode_unlock(spmp->iroot); 1370 1371 /* 1372 * PFS could not be found? 1373 */ 1374 if (chain == NULL) { 1375 hammer2_unmount_helper(mp, NULL, hmp); 1376 lockmgr(&hammer2_mntlk, LK_RELEASE); 1377 hammer2_vfs_unmount(mp, MNT_FORCE); 1378 1379 if (error) { 1380 kprintf("hammer2_mount: PFS label I/O error\n"); 1381 return EINVAL; 1382 } else { 1383 kprintf("hammer2_mount: PFS label \"%s\" not found\n", 1384 label); 1385 return ENOENT; 1386 } 1387 } 1388 1389 /* 1390 * Acquire the pmp structure (it should have already been allocated 1391 * via hammer2_update_pmps()). 1392 */ 1393 if (chain->error) { 1394 kprintf("hammer2_mount: PFS label I/O error\n"); 1395 } else { 1396 ripdata = &chain->data->ipdata; 1397 pmp = hammer2_pfsalloc(NULL, ripdata, force_local); 1398 } 1399 hammer2_chain_unlock(chain); 1400 hammer2_chain_drop(chain); 1401 1402 /* 1403 * PFS to mount must exist at this point. 1404 */ 1405 if (pmp == NULL) { 1406 kprintf("hammer2_mount: Failed to acquire PFS structure\n"); 1407 hammer2_unmount_helper(mp, NULL, hmp); 1408 lockmgr(&hammer2_mntlk, LK_RELEASE); 1409 hammer2_vfs_unmount(mp, MNT_FORCE); 1410 return EINVAL; 1411 } 1412 1413 /* 1414 * Finish the mount 1415 */ 1416 kprintf("hammer2_mount: hmp=%p pmp=%p\n", hmp, pmp); 1417 1418 /* Check if the pmp has already been mounted. */ 1419 if (pmp->mp) { 1420 kprintf("hammer2_mount: PFS already mounted!\n"); 1421 hammer2_unmount_helper(mp, NULL, hmp); 1422 lockmgr(&hammer2_mntlk, LK_RELEASE); 1423 hammer2_vfs_unmount(mp, MNT_FORCE); 1424 return EBUSY; 1425 } 1426 1427 pmp->hflags = info.hflags; 1428 mp->mnt_flag |= MNT_LOCAL; 1429 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; /* all entry pts are SMP */ 1430 mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */ 1431 1432 /* 1433 * required mount structure initializations 1434 */ 1435 mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE; 1436 mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE; 1437 1438 mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE; 1439 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE; 1440 1441 /* 1442 * Optional fields 1443 */ 1444 mp->mnt_iosize_max = MAXPHYS; 1445 1446 /* 1447 * Connect up mount pointers. 1448 */ 1449 hammer2_mount_helper(mp, pmp); 1450 lockmgr(&hammer2_mntlk, LK_RELEASE); 1451 1452 #if 0 1453 /* 1454 * Finish setup 1455 */ 1456 vfs_getnewfsid(mp); 1457 vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops); 1458 vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops); 1459 vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops); 1460 1461 if (path) { 1462 copyinstr(info.volume, mp->mnt_stat.f_mntfromname, 1463 MNAMELEN - 1, &size); 1464 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 1465 } /* else root mount, already in there */ 1466 1467 bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname)); 1468 if (path) { 1469 copyinstr(path, mp->mnt_stat.f_mntonname, 1470 sizeof(mp->mnt_stat.f_mntonname) - 1, 1471 &size); 1472 } else { 1473 /* root mount */ 1474 mp->mnt_stat.f_mntonname[0] = '/'; 1475 } 1476 #endif 1477 1478 /* 1479 * Initial statfs to prime mnt_stat. 1480 */ 1481 hammer2_vfs_statfs(mp, &mp->mnt_stat, NULL); 1482 hammer2_vfs_statvfs(mp, &mp->mnt_vstat, NULL); 1483 1484 return 0; 1485 } 1486 1487 /* 1488 * Scan PFSs under the super-root and create hammer2_pfs structures. 1489 */ 1490 static 1491 void 1492 hammer2_update_pmps(hammer2_dev_t *hmp) 1493 { 1494 const hammer2_inode_data_t *ripdata; 1495 hammer2_chain_t *parent; 1496 hammer2_chain_t *chain; 1497 hammer2_dev_t *force_local; 1498 hammer2_pfs_t *spmp; 1499 hammer2_key_t key_next; 1500 int error; 1501 1502 /* 1503 * Force local mount (disassociate all PFSs from their clusters). 1504 * Used primarily for debugging. 1505 */ 1506 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL; 1507 1508 /* 1509 * Lookup mount point under the media-localized super-root. 1510 * 1511 * cluster->pmp will incorrectly point to spmp and must be fixed 1512 * up later on. 1513 */ 1514 spmp = hmp->spmp; 1515 hammer2_inode_lock(spmp->iroot, 0); 1516 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS); 1517 chain = hammer2_chain_lookup(&parent, &key_next, 1518 HAMMER2_KEY_MIN, HAMMER2_KEY_MAX, 1519 &error, 0); 1520 while (chain) { 1521 if (chain->error) { 1522 kprintf("I/O error scanning PFS labels\n"); 1523 } else if (chain->bref.type != HAMMER2_BREF_TYPE_INODE) { 1524 kprintf("Non inode chain type %d under super-root\n", 1525 chain->bref.type); 1526 } else { 1527 ripdata = &chain->data->ipdata; 1528 hammer2_pfsalloc(chain, ripdata, force_local); 1529 } 1530 chain = hammer2_chain_next(&parent, chain, &key_next, 1531 key_next, HAMMER2_KEY_MAX, 1532 &error, 0); 1533 } 1534 if (parent) { 1535 hammer2_chain_unlock(parent); 1536 hammer2_chain_drop(parent); 1537 } 1538 hammer2_inode_unlock(spmp->iroot); 1539 } 1540 1541 #if 0 1542 static 1543 int 1544 hammer2_remount(hammer2_dev_t *hmp, struct mount *mp, char *path __unused, 1545 struct ucred *cred) 1546 { 1547 hammer2_volume_t *vol; 1548 struct m_vnode *devvp; 1549 int i, error, result = 0; 1550 1551 if (!(hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR))) 1552 return 0; 1553 1554 for (i = 0; i < hmp->nvolumes; ++i) { 1555 vol = &hmp->volumes[i]; 1556 devvp = vol->dev->devvp; 1557 KKASSERT(devvp); 1558 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1559 VOP_OPEN(devvp, FREAD | FWRITE, FSCRED, NULL); 1560 vn_unlock(devvp); 1561 error = 0; 1562 if (vol->id == HAMMER2_ROOT_VOLUME) { 1563 error = hammer2_recovery(hmp); 1564 if (error == 0) 1565 error |= hammer2_fixup_pfses(hmp); 1566 } 1567 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 1568 if (error == 0) { 1569 VOP_CLOSE(devvp, FREAD, NULL); 1570 } else { 1571 VOP_CLOSE(devvp, FREAD | FWRITE, NULL); 1572 } 1573 vn_unlock(devvp); 1574 result |= error; 1575 } 1576 if (result == 0) { 1577 kprintf("hammer2: enable read/write\n"); 1578 hmp->ronly = 0; 1579 } 1580 1581 return result; 1582 } 1583 #endif 1584 1585 int 1586 hammer2_vfs_unmount(struct mount *mp, int mntflags) 1587 { 1588 hammer2_pfs_t *pmp; 1589 int flags; 1590 int error = 0; 1591 1592 pmp = MPTOPMP(mp); 1593 1594 if (pmp == NULL) 1595 return(0); 1596 1597 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 1598 1599 /* 1600 * If mount initialization proceeded far enough we must flush 1601 * its vnodes and sync the underlying mount points. Three syncs 1602 * are required to fully flush the filesystem (freemap updates lag 1603 * by one flush, and one extra for safety). 1604 */ 1605 if (mntflags & MNT_FORCE) 1606 flags = FORCECLOSE; 1607 else 1608 flags = 0; 1609 if (pmp->iroot) { 1610 error = vflush(mp, 0, flags); 1611 if (error) 1612 goto failed; 1613 hammer2_vfs_sync(mp, MNT_WAIT); 1614 hammer2_vfs_sync(mp, MNT_WAIT); 1615 hammer2_vfs_sync(mp, MNT_WAIT); 1616 } 1617 1618 /* 1619 * Cleanup the frontend support XOPS threads 1620 */ 1621 hammer2_xop_helper_cleanup(pmp); 1622 1623 if (pmp->mp) 1624 hammer2_unmount_helper(mp, pmp, NULL); 1625 1626 error = 0; 1627 failed: 1628 lockmgr(&hammer2_mntlk, LK_RELEASE); 1629 1630 return (error); 1631 } 1632 1633 /* 1634 * Mount helper, hook the system mount into our PFS. 1635 * The mount lock is held. 1636 * 1637 * We must bump the mount_count on related devices for any 1638 * mounted PFSs. 1639 */ 1640 static 1641 void 1642 hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp) 1643 { 1644 hammer2_cluster_t *cluster; 1645 hammer2_chain_t *rchain; 1646 int i; 1647 1648 mp->mnt_data = (qaddr_t)pmp; 1649 pmp->mp = mp; 1650 1651 /* 1652 * After pmp->mp is set we have to adjust hmp->mount_count. 1653 */ 1654 cluster = &pmp->iroot->cluster; 1655 for (i = 0; i < cluster->nchains; ++i) { 1656 rchain = cluster->array[i].chain; 1657 if (rchain == NULL) 1658 continue; 1659 ++rchain->hmp->mount_count; 1660 } 1661 1662 /* 1663 * Create missing Xop threads 1664 */ 1665 hammer2_xop_helper_create(pmp); 1666 } 1667 1668 /* 1669 * Unmount helper, unhook the system mount from our PFS. 1670 * The mount lock is held. 1671 * 1672 * If hmp is supplied a mount responsible for being the first to open 1673 * the block device failed and the block device and all PFSs using the 1674 * block device must be cleaned up. 1675 * 1676 * If pmp is supplied multiple devices might be backing the PFS and each 1677 * must be disconnected. This might not be the last PFS using some of the 1678 * underlying devices. Also, we have to adjust our hmp->mount_count 1679 * accounting for the devices backing the pmp which is now undergoing an 1680 * unmount. 1681 */ 1682 static 1683 void 1684 hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp, hammer2_dev_t *hmp) 1685 { 1686 hammer2_cluster_t *cluster; 1687 hammer2_chain_t *rchain; 1688 int dumpcnt; 1689 int i; 1690 1691 /* 1692 * If no device supplied this is a high-level unmount and we have to 1693 * to disconnect the mount, adjust mount_count, and locate devices 1694 * that might now have no mounts. 1695 */ 1696 if (pmp) { 1697 KKASSERT(hmp == NULL); 1698 KKASSERT(MPTOPMP(mp) == pmp); 1699 pmp->mp = NULL; 1700 mp->mnt_data = NULL; 1701 1702 /* 1703 * After pmp->mp is cleared we have to account for 1704 * mount_count. 1705 */ 1706 cluster = &pmp->iroot->cluster; 1707 for (i = 0; i < cluster->nchains; ++i) { 1708 rchain = cluster->array[i].chain; 1709 if (rchain == NULL) 1710 continue; 1711 --rchain->hmp->mount_count; 1712 /* scrapping hmp now may invalidate the pmp */ 1713 } 1714 again: 1715 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) { 1716 if (hmp->mount_count == 0) { 1717 hammer2_unmount_helper(NULL, NULL, hmp); 1718 goto again; 1719 } 1720 } 1721 return; 1722 } 1723 1724 /* 1725 * Try to terminate the block device. We can't terminate it if 1726 * there are still PFSs referencing it. 1727 */ 1728 if (hmp->mount_count) 1729 return; 1730 1731 /* 1732 * Decomission the network before we start messing with the 1733 * device and PFS. 1734 */ 1735 hammer2_iocom_uninit(hmp); 1736 1737 hammer2_bulkfree_uninit(hmp); 1738 hammer2_pfsfree_scan(hmp, 0); 1739 1740 /* 1741 * Cycle the volume data lock as a safety (probably not needed any 1742 * more). To ensure everything is out we need to flush at least 1743 * three times. (1) The running of the sideq can dirty the 1744 * filesystem, (2) A normal flush can dirty the freemap, and 1745 * (3) ensure that the freemap is fully synchronized. 1746 * 1747 * The next mount's recovery scan can clean everything up but we want 1748 * to leave the filesystem in a 100% clean state on a normal unmount. 1749 */ 1750 #if 0 1751 hammer2_voldata_lock(hmp); 1752 hammer2_voldata_unlock(hmp); 1753 #endif 1754 1755 /* 1756 * Flush whatever is left. Unmounted but modified PFS's might still 1757 * have some dirty chains on them. 1758 */ 1759 hammer2_chain_lock(&hmp->vchain, HAMMER2_RESOLVE_ALWAYS); 1760 hammer2_chain_lock(&hmp->fchain, HAMMER2_RESOLVE_ALWAYS); 1761 1762 if (hmp->fchain.flags & HAMMER2_CHAIN_FLUSH_MASK) { 1763 hammer2_voldata_modify(hmp); 1764 hammer2_flush(&hmp->fchain, HAMMER2_FLUSH_TOP | 1765 HAMMER2_FLUSH_ALL); 1766 } 1767 hammer2_chain_unlock(&hmp->fchain); 1768 1769 if (hmp->vchain.flags & HAMMER2_CHAIN_FLUSH_MASK) { 1770 hammer2_flush(&hmp->vchain, HAMMER2_FLUSH_TOP | 1771 HAMMER2_FLUSH_ALL); 1772 } 1773 hammer2_chain_unlock(&hmp->vchain); 1774 1775 if ((hmp->vchain.flags | hmp->fchain.flags) & 1776 HAMMER2_CHAIN_FLUSH_MASK) { 1777 kprintf("hammer2_unmount: chains left over after final sync\n"); 1778 kprintf(" vchain %08x\n", hmp->vchain.flags); 1779 kprintf(" fchain %08x\n", hmp->fchain.flags); 1780 1781 if (hammer2_debug & 0x0010) 1782 Debugger("entered debugger"); 1783 } 1784 1785 hammer2_pfsfree_scan(hmp, 1); 1786 1787 KKASSERT(hmp->spmp == NULL); 1788 1789 /* 1790 * Finish up with the device vnode 1791 */ 1792 if (!TAILQ_EMPTY(&hmp->devvpl)) { 1793 hammer2_close_devvp(&hmp->devvpl, hmp->ronly); 1794 hammer2_cleanup_devvp(&hmp->devvpl); 1795 } 1796 KKASSERT(TAILQ_EMPTY(&hmp->devvpl)); 1797 1798 /* 1799 * Clear vchain/fchain flags that might prevent final cleanup 1800 * of these chains. 1801 */ 1802 if (hmp->vchain.flags & HAMMER2_CHAIN_MODIFIED) { 1803 atomic_add_long(&hammer2_count_modified_chains, -1); 1804 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_MODIFIED); 1805 hammer2_pfs_memory_wakeup(hmp->vchain.pmp, -1); 1806 } 1807 if (hmp->vchain.flags & HAMMER2_CHAIN_UPDATE) { 1808 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_UPDATE); 1809 } 1810 1811 if (hmp->fchain.flags & HAMMER2_CHAIN_MODIFIED) { 1812 atomic_add_long(&hammer2_count_modified_chains, -1); 1813 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_MODIFIED); 1814 hammer2_pfs_memory_wakeup(hmp->fchain.pmp, -1); 1815 } 1816 if (hmp->fchain.flags & HAMMER2_CHAIN_UPDATE) { 1817 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_UPDATE); 1818 } 1819 1820 dumpcnt = 50; 1821 hammer2_dump_chain(&hmp->vchain, 0, 0, &dumpcnt, 'v', (u_int)-1); 1822 dumpcnt = 50; 1823 hammer2_dump_chain(&hmp->fchain, 0, 0, &dumpcnt, 'f', (u_int)-1); 1824 1825 /* 1826 * Final drop of embedded freemap root chain to 1827 * clean up fchain.core (fchain structure is not 1828 * flagged ALLOCATED so it is cleaned out and then 1829 * left to rot). 1830 */ 1831 hammer2_chain_drop(&hmp->fchain); 1832 1833 /* 1834 * Final drop of embedded volume root chain to clean 1835 * up vchain.core (vchain structure is not flagged 1836 * ALLOCATED so it is cleaned out and then left to 1837 * rot). 1838 */ 1839 hammer2_chain_drop(&hmp->vchain); 1840 1841 hammer2_io_hash_cleanup_all(hmp); 1842 if (hmp->iofree_count) { 1843 kprintf("io_cleanup: %d I/O's left hanging\n", 1844 hmp->iofree_count); 1845 } 1846 1847 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry); 1848 kmalloc_destroy_obj(&hmp->mchain); 1849 kmalloc_destroy_obj(&hmp->mio); 1850 kmalloc_destroy(&hmp->mmsg); 1851 kfree(hmp, M_HAMMER2); 1852 } 1853 1854 int 1855 hammer2_vfs_vget(struct mount *mp, struct m_vnode *dvp, 1856 ino_t ino, struct m_vnode **vpp) 1857 { 1858 hammer2_xop_lookup_t *xop; 1859 hammer2_pfs_t *pmp; 1860 hammer2_inode_t *ip; 1861 hammer2_tid_t inum; 1862 int error; 1863 1864 inum = (hammer2_tid_t)ino & HAMMER2_DIRHASH_USERMSK; 1865 1866 error = 0; 1867 pmp = MPTOPMP(mp); 1868 1869 /* 1870 * Easy if we already have it cached 1871 */ 1872 ip = hammer2_inode_lookup(pmp, inum); 1873 if (ip) { 1874 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED); 1875 *vpp = hammer2_igetv(ip, &error); 1876 hammer2_inode_unlock(ip); 1877 hammer2_inode_drop(ip); /* from lookup */ 1878 1879 return error; 1880 } 1881 1882 /* 1883 * Otherwise we have to find the inode 1884 */ 1885 xop = hammer2_xop_alloc(pmp->iroot, 0); 1886 xop->lhc = inum; 1887 hammer2_xop_start(&xop->head, &hammer2_lookup_desc); 1888 error = hammer2_xop_collect(&xop->head, 0); 1889 1890 if (error == 0) 1891 ip = hammer2_inode_get(pmp, &xop->head, -1, -1); 1892 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1893 1894 if (ip) { 1895 *vpp = hammer2_igetv(ip, &error); 1896 hammer2_inode_unlock(ip); 1897 } else { 1898 *vpp = NULL; 1899 error = ENOENT; 1900 } 1901 return (error); 1902 } 1903 1904 int 1905 hammer2_vfs_root(struct mount *mp, struct m_vnode **vpp) 1906 { 1907 hammer2_pfs_t *pmp; 1908 struct m_vnode *vp; 1909 int error; 1910 1911 pmp = MPTOPMP(mp); 1912 if (pmp->iroot == NULL) { 1913 kprintf("hammer2 (%s): no root inode\n", 1914 mp->mnt_stat.f_mntfromname); 1915 *vpp = NULL; 1916 return EINVAL; 1917 } 1918 1919 error = 0; 1920 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED); 1921 1922 while (pmp->inode_tid == 0) { 1923 hammer2_xop_ipcluster_t *xop; 1924 const hammer2_inode_meta_t *meta; 1925 1926 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING); 1927 hammer2_xop_start(&xop->head, &hammer2_ipcluster_desc); 1928 error = hammer2_xop_collect(&xop->head, 0); 1929 1930 if (error == 0) { 1931 meta = &hammer2_xop_gdata(&xop->head)->ipdata.meta; 1932 pmp->iroot->meta = *meta; 1933 pmp->inode_tid = meta->pfs_inum + 1; 1934 hammer2_xop_pdata(&xop->head); 1935 /* meta invalid */ 1936 1937 if (pmp->inode_tid < HAMMER2_INODE_START) 1938 pmp->inode_tid = HAMMER2_INODE_START; 1939 pmp->modify_tid = 1940 xop->head.cluster.focus->bref.modify_tid + 1; 1941 #if 0 1942 kprintf("PFS: Starting inode %jd\n", 1943 (intmax_t)pmp->inode_tid); 1944 kprintf("PMP focus good set nextino=%ld mod=%016jx\n", 1945 pmp->inode_tid, pmp->modify_tid); 1946 #endif 1947 //wakeup(&pmp->iroot); XXX 1948 1949 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1950 1951 /* 1952 * Prime the mount info. 1953 */ 1954 hammer2_vfs_statfs(mp, &mp->mnt_stat, NULL); 1955 break; 1956 } 1957 1958 /* 1959 * Loop, try again 1960 */ 1961 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1962 hammer2_inode_unlock(pmp->iroot); 1963 error = tsleep(&pmp->iroot, PCATCH, "h2root", hz); 1964 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED); 1965 if (error == EINTR) 1966 break; 1967 } 1968 1969 if (error) { 1970 hammer2_inode_unlock(pmp->iroot); 1971 *vpp = NULL; 1972 } else { 1973 vp = hammer2_igetv(pmp->iroot, &error); 1974 hammer2_inode_unlock(pmp->iroot); 1975 *vpp = vp; 1976 } 1977 1978 return (error); 1979 } 1980 1981 /* 1982 * Filesystem status 1983 * 1984 * XXX incorporate ipdata->meta.inode_quota and data_quota 1985 */ 1986 static 1987 int 1988 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 1989 { 1990 hammer2_pfs_t *pmp; 1991 hammer2_dev_t *hmp; 1992 hammer2_blockref_t bref; 1993 struct statfs tmp; 1994 int i; 1995 1996 /* 1997 * NOTE: iroot might not have validated the cluster yet. 1998 */ 1999 pmp = MPTOPMP(mp); 2000 2001 bzero(&tmp, sizeof(tmp)); 2002 2003 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) { 2004 hmp = pmp->pfs_hmps[i]; 2005 if (hmp == NULL) 2006 continue; 2007 if (pmp->iroot->cluster.array[i].chain) 2008 bref = pmp->iroot->cluster.array[i].chain->bref; 2009 else 2010 bzero(&bref, sizeof(bref)); 2011 2012 tmp.f_files = bref.embed.stats.inode_count; 2013 tmp.f_ffree = 0; 2014 tmp.f_blocks = hmp->voldata.allocator_size / 2015 mp->mnt_vstat.f_bsize; 2016 tmp.f_bfree = hmp->voldata.allocator_free / 2017 mp->mnt_vstat.f_bsize; 2018 tmp.f_bavail = tmp.f_bfree; 2019 2020 if (cred && cred->cr_uid != 0) { 2021 uint64_t adj; 2022 2023 /* 5% */ 2024 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize; 2025 tmp.f_blocks -= adj; 2026 tmp.f_bfree -= adj; 2027 tmp.f_bavail -= adj; 2028 } 2029 2030 mp->mnt_stat.f_blocks = tmp.f_blocks; 2031 mp->mnt_stat.f_bfree = tmp.f_bfree; 2032 mp->mnt_stat.f_bavail = tmp.f_bavail; 2033 mp->mnt_stat.f_files = tmp.f_files; 2034 mp->mnt_stat.f_ffree = tmp.f_ffree; 2035 2036 *sbp = mp->mnt_stat; 2037 } 2038 return (0); 2039 } 2040 2041 static 2042 int 2043 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 2044 { 2045 hammer2_pfs_t *pmp; 2046 hammer2_dev_t *hmp; 2047 hammer2_blockref_t bref; 2048 struct statvfs tmp; 2049 int i; 2050 2051 /* 2052 * NOTE: iroot might not have validated the cluster yet. 2053 */ 2054 pmp = MPTOPMP(mp); 2055 bzero(&tmp, sizeof(tmp)); 2056 2057 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) { 2058 hmp = pmp->pfs_hmps[i]; 2059 if (hmp == NULL) 2060 continue; 2061 if (pmp->iroot->cluster.array[i].chain) 2062 bref = pmp->iroot->cluster.array[i].chain->bref; 2063 else 2064 bzero(&bref, sizeof(bref)); 2065 2066 tmp.f_files = bref.embed.stats.inode_count; 2067 tmp.f_ffree = 0; 2068 tmp.f_blocks = hmp->voldata.allocator_size / 2069 mp->mnt_vstat.f_bsize; 2070 tmp.f_bfree = hmp->voldata.allocator_free / 2071 mp->mnt_vstat.f_bsize; 2072 tmp.f_bavail = tmp.f_bfree; 2073 2074 if (cred && cred->cr_uid != 0) { 2075 uint64_t adj; 2076 2077 /* 5% */ 2078 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize; 2079 tmp.f_blocks -= adj; 2080 tmp.f_bfree -= adj; 2081 tmp.f_bavail -= adj; 2082 } 2083 2084 mp->mnt_vstat.f_blocks = tmp.f_blocks; 2085 mp->mnt_vstat.f_bfree = tmp.f_bfree; 2086 mp->mnt_vstat.f_bavail = tmp.f_bavail; 2087 mp->mnt_vstat.f_files = tmp.f_files; 2088 mp->mnt_vstat.f_ffree = tmp.f_ffree; 2089 2090 *sbp = mp->mnt_vstat; 2091 } 2092 return (0); 2093 } 2094 2095 /* 2096 * Mount-time recovery (RW mounts) 2097 * 2098 * Updates to the free block table are allowed to lag flushes by one 2099 * transaction. In case of a crash, then on a fresh mount we must do an 2100 * incremental scan of the last committed transaction id and make sure that 2101 * all related blocks have been marked allocated. 2102 */ 2103 struct hammer2_recovery_elm { 2104 TAILQ_ENTRY(hammer2_recovery_elm) entry; 2105 hammer2_chain_t *chain; 2106 hammer2_tid_t sync_tid; 2107 }; 2108 2109 TAILQ_HEAD(hammer2_recovery_list, hammer2_recovery_elm); 2110 2111 struct hammer2_recovery_info { 2112 struct hammer2_recovery_list list; 2113 hammer2_tid_t mtid; 2114 int depth; 2115 }; 2116 2117 static int hammer2_recovery_scan(hammer2_dev_t *hmp, 2118 hammer2_chain_t *parent, 2119 struct hammer2_recovery_info *info, 2120 hammer2_tid_t sync_tid); 2121 2122 #define HAMMER2_RECOVERY_MAXDEPTH 10 2123 2124 static 2125 int 2126 hammer2_recovery(hammer2_dev_t *hmp) 2127 { 2128 struct hammer2_recovery_info info; 2129 struct hammer2_recovery_elm *elm; 2130 hammer2_chain_t *parent; 2131 hammer2_tid_t sync_tid; 2132 hammer2_tid_t mirror_tid; 2133 int error; 2134 2135 hammer2_trans_init(hmp->spmp, 0); 2136 2137 sync_tid = hmp->voldata.freemap_tid; 2138 mirror_tid = hmp->voldata.mirror_tid; 2139 2140 kprintf("hammer2_mount: \"%s\": ", hmp->devrepname); 2141 if (sync_tid >= mirror_tid) { 2142 kprintf("no recovery needed\n"); 2143 } else { 2144 kprintf("freemap recovery %016jx-%016jx\n", 2145 sync_tid + 1, mirror_tid); 2146 } 2147 2148 TAILQ_INIT(&info.list); 2149 info.depth = 0; 2150 parent = hammer2_chain_lookup_init(&hmp->vchain, 0); 2151 error = hammer2_recovery_scan(hmp, parent, &info, sync_tid); 2152 hammer2_chain_lookup_done(parent); 2153 2154 while ((elm = TAILQ_FIRST(&info.list)) != NULL) { 2155 TAILQ_REMOVE(&info.list, elm, entry); 2156 parent = elm->chain; 2157 sync_tid = elm->sync_tid; 2158 kfree(elm, M_HAMMER2); 2159 2160 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS); 2161 error |= hammer2_recovery_scan(hmp, parent, &info, 2162 hmp->voldata.freemap_tid); 2163 hammer2_chain_unlock(parent); 2164 hammer2_chain_drop(parent); /* drop elm->chain ref */ 2165 } 2166 2167 hammer2_trans_done(hmp->spmp, 0); 2168 2169 return error; 2170 } 2171 2172 static 2173 int 2174 hammer2_recovery_scan(hammer2_dev_t *hmp, hammer2_chain_t *parent, 2175 struct hammer2_recovery_info *info, 2176 hammer2_tid_t sync_tid) 2177 { 2178 const hammer2_inode_data_t *ripdata; 2179 hammer2_chain_t *chain; 2180 hammer2_blockref_t bref; 2181 int tmp_error; 2182 int rup_error; 2183 int error; 2184 int first; 2185 2186 /* 2187 * Adjust freemap to ensure that the block(s) are marked allocated. 2188 */ 2189 if (parent->bref.type != HAMMER2_BREF_TYPE_VOLUME) { 2190 hammer2_freemap_adjust(hmp, &parent->bref, 2191 HAMMER2_FREEMAP_DORECOVER); 2192 } 2193 2194 /* 2195 * Check type for recursive scan 2196 */ 2197 switch(parent->bref.type) { 2198 case HAMMER2_BREF_TYPE_VOLUME: 2199 /* data already instantiated */ 2200 break; 2201 case HAMMER2_BREF_TYPE_INODE: 2202 /* 2203 * Must instantiate data for DIRECTDATA test and also 2204 * for recursion. 2205 */ 2206 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS); 2207 ripdata = &parent->data->ipdata; 2208 if (ripdata->meta.op_flags & HAMMER2_OPFLAG_DIRECTDATA) { 2209 /* not applicable to recovery scan */ 2210 hammer2_chain_unlock(parent); 2211 return 0; 2212 } 2213 hammer2_chain_unlock(parent); 2214 break; 2215 case HAMMER2_BREF_TYPE_INDIRECT: 2216 /* 2217 * Must instantiate data for recursion 2218 */ 2219 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS); 2220 hammer2_chain_unlock(parent); 2221 break; 2222 case HAMMER2_BREF_TYPE_DIRENT: 2223 case HAMMER2_BREF_TYPE_DATA: 2224 case HAMMER2_BREF_TYPE_FREEMAP: 2225 case HAMMER2_BREF_TYPE_FREEMAP_NODE: 2226 case HAMMER2_BREF_TYPE_FREEMAP_LEAF: 2227 /* not applicable to recovery scan */ 2228 return 0; 2229 break; 2230 default: 2231 return HAMMER2_ERROR_BADBREF; 2232 } 2233 2234 /* 2235 * Defer operation if depth limit reached. 2236 */ 2237 if (info->depth >= HAMMER2_RECOVERY_MAXDEPTH) { 2238 struct hammer2_recovery_elm *elm; 2239 2240 elm = kmalloc(sizeof(*elm), M_HAMMER2, M_ZERO | M_WAITOK); 2241 elm->chain = parent; 2242 elm->sync_tid = sync_tid; 2243 hammer2_chain_ref(parent); 2244 TAILQ_INSERT_TAIL(&info->list, elm, entry); 2245 /* unlocked by caller */ 2246 2247 return(0); 2248 } 2249 2250 2251 /* 2252 * Recursive scan of the last flushed transaction only. We are 2253 * doing this without pmp assignments so don't leave the chains 2254 * hanging around after we are done with them. 2255 * 2256 * error Cumulative error this level only 2257 * rup_error Cumulative error for recursion 2258 * tmp_error Specific non-cumulative recursion error 2259 */ 2260 chain = NULL; 2261 first = 1; 2262 rup_error = 0; 2263 error = 0; 2264 2265 for (;;) { 2266 error |= hammer2_chain_scan(parent, &chain, &bref, 2267 &first, 2268 HAMMER2_LOOKUP_NODATA); 2269 2270 /* 2271 * Problem during scan or EOF 2272 */ 2273 if (error) 2274 break; 2275 2276 /* 2277 * If this is a leaf 2278 */ 2279 if (chain == NULL) { 2280 if (bref.mirror_tid > sync_tid) { 2281 hammer2_freemap_adjust(hmp, &bref, 2282 HAMMER2_FREEMAP_DORECOVER); 2283 } 2284 continue; 2285 } 2286 2287 /* 2288 * This may or may not be a recursive node. 2289 */ 2290 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE); 2291 if (bref.mirror_tid > sync_tid) { 2292 ++info->depth; 2293 tmp_error = hammer2_recovery_scan(hmp, chain, 2294 info, sync_tid); 2295 --info->depth; 2296 } else { 2297 tmp_error = 0; 2298 } 2299 2300 /* 2301 * Flush the recovery at the PFS boundary to stage it for 2302 * the final flush of the super-root topology. 2303 */ 2304 if (tmp_error == 0 && 2305 (bref.flags & HAMMER2_BREF_FLAG_PFSROOT) && 2306 (chain->flags & HAMMER2_CHAIN_ONFLUSH)) { 2307 hammer2_flush(chain, HAMMER2_FLUSH_TOP | 2308 HAMMER2_FLUSH_ALL); 2309 } 2310 rup_error |= tmp_error; 2311 } 2312 return ((error | rup_error) & ~HAMMER2_ERROR_EOF); 2313 } 2314 2315 /* 2316 * This fixes up an error introduced in earlier H2 implementations where 2317 * moving a PFS inode into an indirect block wound up causing the 2318 * HAMMER2_BREF_FLAG_PFSROOT flag in the bref to get cleared. 2319 */ 2320 static 2321 int 2322 hammer2_fixup_pfses(hammer2_dev_t *hmp) 2323 { 2324 const hammer2_inode_data_t *ripdata; 2325 hammer2_chain_t *parent; 2326 hammer2_chain_t *chain; 2327 hammer2_key_t key_next; 2328 hammer2_pfs_t *spmp; 2329 int error; 2330 2331 error = 0; 2332 2333 /* 2334 * Lookup mount point under the media-localized super-root. 2335 * 2336 * cluster->pmp will incorrectly point to spmp and must be fixed 2337 * up later on. 2338 */ 2339 spmp = hmp->spmp; 2340 hammer2_inode_lock(spmp->iroot, 0); 2341 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS); 2342 chain = hammer2_chain_lookup(&parent, &key_next, 2343 HAMMER2_KEY_MIN, HAMMER2_KEY_MAX, 2344 &error, 0); 2345 while (chain) { 2346 if (chain->bref.type != HAMMER2_BREF_TYPE_INODE) 2347 continue; 2348 if (chain->error) { 2349 kprintf("I/O error scanning PFS labels\n"); 2350 error |= chain->error; 2351 } else if ((chain->bref.flags & 2352 HAMMER2_BREF_FLAG_PFSROOT) == 0) { 2353 int error2; 2354 2355 ripdata = &chain->data->ipdata; 2356 hammer2_trans_init(hmp->spmp, 0); 2357 error2 = hammer2_chain_modify(chain, 2358 chain->bref.modify_tid, 2359 0, 0); 2360 if (error2 == 0) { 2361 kprintf("hammer2: Correct mis-flagged PFS %s\n", 2362 ripdata->filename); 2363 chain->bref.flags |= HAMMER2_BREF_FLAG_PFSROOT; 2364 } else { 2365 error |= error2; 2366 } 2367 hammer2_flush(chain, HAMMER2_FLUSH_TOP | 2368 HAMMER2_FLUSH_ALL); 2369 hammer2_trans_done(hmp->spmp, 0); 2370 } 2371 chain = hammer2_chain_next(&parent, chain, &key_next, 2372 key_next, HAMMER2_KEY_MAX, 2373 &error, 0); 2374 } 2375 if (parent) { 2376 hammer2_chain_unlock(parent); 2377 hammer2_chain_drop(parent); 2378 } 2379 hammer2_inode_unlock(spmp->iroot); 2380 2381 return error; 2382 } 2383 2384 /* 2385 * Sync a mount point; this is called periodically on a per-mount basis from 2386 * the filesystem syncer, and whenever a user issues a sync. 2387 */ 2388 int 2389 hammer2_vfs_sync(struct mount *mp, int waitfor) 2390 { 2391 int error; 2392 2393 error = hammer2_vfs_sync_pmp(MPTOPMP(mp), waitfor); 2394 2395 return error; 2396 } 2397 2398 /* 2399 * Because frontend operations lock vnodes before we get a chance to 2400 * lock the related inode, we can't just acquire a vnode lock without 2401 * risking a deadlock. The frontend may be holding a vnode lock while 2402 * also blocked on our SYNCQ flag while trying to get the inode lock. 2403 * 2404 * To deal with this situation we can check the vnode lock situation 2405 * after locking the inode and perform a work-around. 2406 */ 2407 int 2408 hammer2_vfs_sync_pmp(hammer2_pfs_t *pmp, int waitfor) 2409 { 2410 hammer2_inode_t *ip; 2411 hammer2_depend_t *depend; 2412 hammer2_depend_t *depend_next; 2413 struct m_vnode *vp; 2414 uint32_t pass2; 2415 int error; 2416 int wakecount; 2417 int dorestart; 2418 2419 /* 2420 * Move all inodes on sideq to syncq. This will clear sideq. 2421 * This should represent all flushable inodes. These inodes 2422 * will already have refs due to being on syncq or sideq. We 2423 * must do this all at once with the spinlock held to ensure that 2424 * all inode dependencies are part of the same flush. 2425 * 2426 * We should be able to do this asynchronously from frontend 2427 * operations because we will be locking the inodes later on 2428 * to actually flush them, and that will partition any frontend 2429 * op using the same inode. Either it has already locked the 2430 * inode and we will block, or it has not yet locked the inode 2431 * and it will block until we are finished flushing that inode. 2432 * 2433 * When restarting, only move the inodes flagged as PASS2 from 2434 * SIDEQ to SYNCQ. PASS2 propagation by inode_lock4() and 2435 * inode_depend() are atomic with the spin-lock. 2436 */ 2437 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH); 2438 #ifdef HAMMER2_DEBUG_SYNC 2439 kprintf("FILESYSTEM SYNC BOUNDARY\n"); 2440 #endif 2441 dorestart = 0; 2442 2443 /* 2444 * Move inodes from depq to syncq, releasing the related 2445 * depend structures. 2446 */ 2447 restart: 2448 #ifdef HAMMER2_DEBUG_SYNC 2449 kprintf("FILESYSTEM SYNC RESTART (%d)\n", dorestart); 2450 #endif 2451 hammer2_trans_setflags(pmp, 0/*HAMMER2_TRANS_COPYQ*/); 2452 hammer2_trans_clearflags(pmp, HAMMER2_TRANS_RESCAN); 2453 2454 /* 2455 * Move inodes from depq to syncq. When restarting, only depq's 2456 * marked pass2 are moved. 2457 */ 2458 hammer2_spin_ex(&pmp->list_spin); 2459 depend_next = TAILQ_FIRST(&pmp->depq); 2460 wakecount = 0; 2461 2462 while ((depend = depend_next) != NULL) { 2463 depend_next = TAILQ_NEXT(depend, entry); 2464 if (dorestart && depend->pass2 == 0) 2465 continue; 2466 TAILQ_FOREACH(ip, &depend->sideq, entry) { 2467 KKASSERT(ip->flags & HAMMER2_INODE_SIDEQ); 2468 atomic_set_int(&ip->flags, HAMMER2_INODE_SYNCQ); 2469 atomic_clear_int(&ip->flags, HAMMER2_INODE_SIDEQ); 2470 ip->depend = NULL; 2471 } 2472 2473 /* 2474 * NOTE: pmp->sideq_count includes both sideq and syncq 2475 */ 2476 TAILQ_CONCAT(&pmp->syncq, &depend->sideq, entry); 2477 2478 depend->count = 0; 2479 depend->pass2 = 0; 2480 TAILQ_REMOVE(&pmp->depq, depend, entry); 2481 } 2482 2483 hammer2_spin_unex(&pmp->list_spin); 2484 hammer2_trans_clearflags(pmp, /*HAMMER2_TRANS_COPYQ |*/ 2485 HAMMER2_TRANS_WAITING); 2486 dorestart = 0; 2487 2488 /* 2489 * sideq_count may have dropped enough to allow us to unstall 2490 * the frontend. 2491 */ 2492 hammer2_pfs_memory_wakeup(pmp, 0); 2493 2494 /* 2495 * Now run through all inodes on syncq. 2496 * 2497 * Flush transactions only interlock with other flush transactions. 2498 * Any conflicting frontend operations will block on the inode, but 2499 * may hold a vnode lock while doing so. 2500 */ 2501 hammer2_spin_ex(&pmp->list_spin); 2502 while ((ip = TAILQ_FIRST(&pmp->syncq)) != NULL) { 2503 /* 2504 * Remove the inode from the SYNCQ, transfer the syncq ref 2505 * to us. We must clear SYNCQ to allow any potential 2506 * front-end deadlock to proceed. We must set PASS2 so 2507 * the dependency code knows what to do. 2508 */ 2509 pass2 = ip->flags; 2510 cpu_ccfence(); 2511 if (atomic_cmpset_int(&ip->flags, 2512 pass2, 2513 (pass2 & ~(HAMMER2_INODE_SYNCQ | 2514 HAMMER2_INODE_SYNCQ_WAKEUP)) | 2515 HAMMER2_INODE_SYNCQ_PASS2) == 0) 2516 { 2517 continue; 2518 } 2519 TAILQ_REMOVE(&pmp->syncq, ip, entry); 2520 --pmp->sideq_count; 2521 hammer2_spin_unex(&pmp->list_spin); 2522 2523 /* 2524 * Tickle anyone waiting on ip->flags or the hysteresis 2525 * on the dirty inode count. 2526 */ 2527 if (pass2 & HAMMER2_INODE_SYNCQ_WAKEUP) 2528 wakeup(&ip->flags); 2529 if (++wakecount >= hammer2_limit_dirty_inodes / 20 + 1) { 2530 wakecount = 0; 2531 hammer2_pfs_memory_wakeup(pmp, 0); 2532 } 2533 2534 /* 2535 * Relock the inode, and we inherit a ref from the above. 2536 * We will check for a race after we acquire the vnode. 2537 */ 2538 hammer2_mtx_ex(&ip->lock); 2539 2540 /* 2541 * We need the vp in order to vfsync() dirty buffers, so if 2542 * one isn't attached we can skip it. 2543 * 2544 * Ordering the inode lock and then the vnode lock has the 2545 * potential to deadlock. If we had left SYNCQ set that could 2546 * also deadlock us against the frontend even if we don't hold 2547 * any locks, but the latter is not a problem now since we 2548 * cleared it. igetv will temporarily release the inode lock 2549 * in a safe manner to work-around the deadlock. 2550 * 2551 * Unfortunately it is still possible to deadlock when the 2552 * frontend obtains multiple inode locks, because all the 2553 * related vnodes are already locked (nor can the vnode locks 2554 * be released and reacquired without messing up RECLAIM and 2555 * INACTIVE sequencing). 2556 * 2557 * The solution for now is to move the vp back onto SIDEQ 2558 * and set dorestart, which will restart the flush after we 2559 * exhaust the current SYNCQ. Note that additional 2560 * dependencies may build up, so we definitely need to move 2561 * the whole SIDEQ back to SYNCQ when we restart. 2562 */ 2563 vp = ip->vp; 2564 if (vp) { 2565 if (vget(vp, LK_EXCLUSIVE|LK_NOWAIT)) { 2566 /* 2567 * Failed to get the vnode, requeue the inode 2568 * (PASS2 is already set so it will be found 2569 * again on the restart). Then unlock. 2570 */ 2571 vp = NULL; 2572 dorestart |= 1; 2573 #ifdef HAMMER2_DEBUG_SYNC 2574 kprintf("inum %ld (sync delayed by vnode)\n", 2575 (long)ip->meta.inum); 2576 #endif 2577 hammer2_inode_delayed_sideq(ip); 2578 2579 hammer2_mtx_unlock(&ip->lock); 2580 hammer2_inode_drop(ip); 2581 2582 /* 2583 * If PASS2 was previously set we might 2584 * be looping too hard, ask for a delay 2585 * along with the restart. 2586 */ 2587 if (pass2 & HAMMER2_INODE_SYNCQ_PASS2) 2588 dorestart |= 2; 2589 hammer2_spin_ex(&pmp->list_spin); 2590 continue; 2591 } 2592 } else { 2593 vp = NULL; 2594 } 2595 2596 /* 2597 * If the inode wound up on a SIDEQ again it will already be 2598 * prepped for another PASS2. In this situation if we flush 2599 * it now we will just wind up flushing it again in the same 2600 * syncer run, so we might as well not flush it now. 2601 */ 2602 if (ip->flags & HAMMER2_INODE_SIDEQ) { 2603 hammer2_mtx_unlock(&ip->lock); 2604 hammer2_inode_drop(ip); 2605 if (vp) 2606 vput(vp); 2607 dorestart |= 1; 2608 hammer2_spin_ex(&pmp->list_spin); 2609 continue; 2610 } 2611 2612 /* 2613 * Ok we have the inode exclusively locked and if vp is 2614 * not NULL that will also be exclusively locked. Do the 2615 * meat of the flush. 2616 * 2617 * vp token needed for v_rbdirty_tree check / vclrisdirty 2618 * sequencing. Though we hold the vnode exclusively so 2619 * we shouldn't need to hold the token also in this case. 2620 */ 2621 if (vp) { 2622 vfsync(vp, MNT_WAIT, 1, NULL, NULL); 2623 bio_track_wait(NULL, 0, 0); /* XXX */ 2624 } 2625 2626 /* 2627 * If the inode has not yet been inserted into the tree 2628 * we must do so. Then sync and flush it. The flush should 2629 * update the parent. 2630 */ 2631 if (ip->flags & HAMMER2_INODE_DELETING) { 2632 #ifdef HAMMER2_DEBUG_SYNC 2633 kprintf("inum %ld destroy\n", (long)ip->meta.inum); 2634 #endif 2635 hammer2_inode_chain_des(ip); 2636 atomic_add_long(&hammer2_iod_inode_deletes, 1); 2637 } else if (ip->flags & HAMMER2_INODE_CREATING) { 2638 #ifdef HAMMER2_DEBUG_SYNC 2639 kprintf("inum %ld insert\n", (long)ip->meta.inum); 2640 #endif 2641 hammer2_inode_chain_ins(ip); 2642 atomic_add_long(&hammer2_iod_inode_creates, 1); 2643 } 2644 #ifdef HAMMER2_DEBUG_SYNC 2645 kprintf("inum %ld chain-sync\n", (long)ip->meta.inum); 2646 #endif 2647 2648 /* 2649 * Because I kinda messed up the design and index the inodes 2650 * under the root inode, along side the directory entries, 2651 * we can't flush the inode index under the iroot until the 2652 * end. If we do it now we might miss effects created by 2653 * other inodes on the SYNCQ. 2654 * 2655 * Do a normal (non-FSSYNC) flush instead, which allows the 2656 * vnode code to work the same. We don't want to force iroot 2657 * back onto the SIDEQ, and we also don't want the flush code 2658 * to update pfs_iroot_blocksets until the final flush later. 2659 * 2660 * XXX at the moment this will likely result in a double-flush 2661 * of the iroot chain. 2662 */ 2663 hammer2_inode_chain_sync(ip); 2664 if (ip == pmp->iroot) { 2665 hammer2_inode_chain_flush(ip, HAMMER2_XOP_INODE_STOP); 2666 } else { 2667 hammer2_inode_chain_flush(ip, HAMMER2_XOP_INODE_STOP | 2668 HAMMER2_XOP_FSSYNC); 2669 } 2670 if (vp) { 2671 lwkt_gettoken(NULL); 2672 if ((ip->flags & (HAMMER2_INODE_MODIFIED | 2673 HAMMER2_INODE_RESIZED | 2674 HAMMER2_INODE_DIRTYDATA)) == 0) { 2675 //RB_EMPTY(&vp->v_rbdirty_tree) && 2676 //!bio_track_active(&vp->v_track_write)) { 2677 vclrisdirty(vp); 2678 } else { 2679 hammer2_inode_delayed_sideq(ip); 2680 } 2681 lwkt_reltoken(NULL); 2682 vput(vp); 2683 vp = NULL; /* safety */ 2684 } 2685 atomic_clear_int(&ip->flags, HAMMER2_INODE_SYNCQ_PASS2); 2686 hammer2_inode_unlock(ip); /* unlock+drop */ 2687 /* ip pointer invalid */ 2688 2689 /* 2690 * If the inode got dirted after we dropped our locks, 2691 * it will have already been moved back to the SIDEQ. 2692 */ 2693 hammer2_spin_ex(&pmp->list_spin); 2694 } 2695 hammer2_spin_unex(&pmp->list_spin); 2696 hammer2_pfs_memory_wakeup(pmp, 0); 2697 2698 if (dorestart || (pmp->trans.flags & HAMMER2_TRANS_RESCAN)) { 2699 /* 2700 * bit 2 is set if something above thinks we might be 2701 * looping too hard, try to unclog the frontend 2702 * dependency and wait a bit before restarting. 2703 * 2704 * NOTE: The frontend could be stuck in h2memw, though 2705 * it isn't supposed to be holding vnode locks 2706 * in that case. 2707 */ 2708 if (dorestart & 2) { 2709 wakeup(&pmp->inmem_dirty_chains); 2710 tsleep(&dorestart, 0, "h2syndel", 2); 2711 } 2712 #ifdef HAMMER2_DEBUG_SYNC 2713 kprintf("FILESYSTEM SYNC STAGE 1 RESTART\n"); 2714 /*tsleep(&dorestart, 0, "h2STG1-R", hz*20);*/ 2715 #endif 2716 dorestart = 1; 2717 goto restart; 2718 } 2719 #ifdef HAMMER2_DEBUG_SYNC 2720 kprintf("FILESYSTEM SYNC STAGE 2 BEGIN\n"); 2721 /*tsleep(&dorestart, 0, "h2STG2", hz*20);*/ 2722 #endif 2723 2724 /* 2725 * We have to flush the PFS root last, even if it does not appear to 2726 * be dirty, because all the inodes in the PFS are indexed under it. 2727 * The normal flushing of iroot above would only occur if directory 2728 * entries under the root were changed. 2729 * 2730 * Specifying VOLHDR will cause an additionl flush of hmp->spmp 2731 * for the media making up the cluster. 2732 */ 2733 if ((ip = pmp->iroot) != NULL) { 2734 hammer2_inode_ref(ip); 2735 hammer2_mtx_ex(&ip->lock); 2736 hammer2_inode_chain_sync(ip); 2737 hammer2_inode_chain_flush(ip, HAMMER2_XOP_INODE_STOP | 2738 HAMMER2_XOP_FSSYNC | 2739 HAMMER2_XOP_VOLHDR); 2740 hammer2_inode_unlock(ip); /* unlock+drop */ 2741 } 2742 #ifdef HAMMER2_DEBUG_SYNC 2743 kprintf("FILESYSTEM SYNC STAGE 2 DONE\n"); 2744 #endif 2745 2746 /* 2747 * device bioq sync 2748 */ 2749 hammer2_bioq_sync(pmp); 2750 2751 error = 0; /* XXX */ 2752 hammer2_trans_done(pmp, HAMMER2_TRANS_ISFLUSH); 2753 2754 return (error); 2755 } 2756 2757 #if 0 2758 static 2759 int 2760 hammer2_vfs_vptofh(struct m_vnode *vp, struct fid *fhp) 2761 { 2762 hammer2_inode_t *ip; 2763 2764 KKASSERT(MAXFIDSZ >= 16); 2765 ip = VTOI(vp); 2766 fhp->fid_len = offsetof(struct fid, fid_data[16]); 2767 fhp->fid_ext = 0; 2768 ((hammer2_tid_t *)fhp->fid_data)[0] = ip->meta.inum; 2769 ((hammer2_tid_t *)fhp->fid_data)[1] = 0; 2770 2771 return 0; 2772 } 2773 2774 static 2775 int 2776 hammer2_vfs_fhtovp(struct mount *mp, struct m_vnode *rootvp, 2777 struct fid *fhp, struct m_vnode **vpp) 2778 { 2779 hammer2_tid_t inum; 2780 int error; 2781 2782 inum = ((hammer2_tid_t *)fhp->fid_data)[0] & HAMMER2_DIRHASH_USERMSK; 2783 if (vpp) { 2784 if (inum == 1) 2785 error = hammer2_vfs_root(mp, vpp); 2786 else 2787 error = hammer2_vfs_vget(mp, NULL, inum, vpp); 2788 } else { 2789 error = 0; 2790 } 2791 return error; 2792 } 2793 2794 static 2795 int 2796 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 2797 int *exflagsp, struct ucred **credanonp) 2798 { 2799 hammer2_pfs_t *pmp; 2800 struct netcred *np; 2801 int error; 2802 2803 pmp = MPTOPMP(mp); 2804 np = vfs_export_lookup(mp, &pmp->export, nam); 2805 if (np) { 2806 *exflagsp = np->netc_exflags; 2807 *credanonp = &np->netc_anon; 2808 error = 0; 2809 } else { 2810 error = EACCES; 2811 } 2812 return error; 2813 } 2814 #endif 2815 2816 /* 2817 * This handles hysteresis on regular file flushes. Because the BIOs are 2818 * routed to a thread it is possible for an excessive number to build up 2819 * and cause long front-end stalls long before the runningbuffspace limit 2820 * is hit, so we implement hammer2_flush_pipe to control the 2821 * hysteresis. 2822 * 2823 * This is a particular problem when compression is used. 2824 */ 2825 void 2826 hammer2_lwinprog_ref(hammer2_pfs_t *pmp) 2827 { 2828 atomic_add_int(&pmp->count_lwinprog, 1); 2829 } 2830 2831 void 2832 hammer2_lwinprog_drop(hammer2_pfs_t *pmp) 2833 { 2834 #if 0 2835 int lwinprog; 2836 2837 lwinprog = atomic_fetchadd_int(&pmp->count_lwinprog, -1); 2838 if ((lwinprog & HAMMER2_LWINPROG_WAITING) && 2839 (lwinprog & HAMMER2_LWINPROG_MASK) <= hammer2_flush_pipe * 2 / 3) { 2840 atomic_clear_int(&pmp->count_lwinprog, 2841 HAMMER2_LWINPROG_WAITING); 2842 wakeup(&pmp->count_lwinprog); 2843 } 2844 if ((lwinprog & HAMMER2_LWINPROG_WAITING0) && 2845 (lwinprog & HAMMER2_LWINPROG_MASK) <= 0) { 2846 atomic_clear_int(&pmp->count_lwinprog, 2847 HAMMER2_LWINPROG_WAITING0); 2848 wakeup(&pmp->count_lwinprog); 2849 } 2850 #endif 2851 } 2852 2853 void 2854 hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int flush_pipe) 2855 { 2856 #if 0 2857 int lwinprog; 2858 int lwflag = (flush_pipe) ? HAMMER2_LWINPROG_WAITING : 2859 HAMMER2_LWINPROG_WAITING0; 2860 2861 for (;;) { 2862 lwinprog = pmp->count_lwinprog; 2863 cpu_ccfence(); 2864 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe) 2865 break; 2866 tsleep_interlock(&pmp->count_lwinprog, 0); 2867 atomic_set_int(&pmp->count_lwinprog, lwflag); 2868 lwinprog = pmp->count_lwinprog; 2869 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe) 2870 break; 2871 tsleep(&pmp->count_lwinprog, PINTERLOCKED, "h2wpipe", hz); 2872 } 2873 #endif 2874 } 2875 2876 #if 0 2877 /* 2878 * It is possible for an excessive number of dirty chains or dirty inodes 2879 * to build up. When this occurs we start an asynchronous filesystem sync. 2880 * If the level continues to build up, we stall, waiting for it to drop, 2881 * with some hysteresis. 2882 * 2883 * This relies on the kernel calling hammer2_vfs_modifying() prior to 2884 * obtaining any vnode locks before making a modifying VOP call. 2885 */ 2886 static int 2887 hammer2_vfs_modifying(struct mount *mp) 2888 { 2889 if (mp->mnt_flag & MNT_RDONLY) 2890 return EROFS; 2891 hammer2_pfs_memory_wait(MPTOPMP(mp)); 2892 2893 return 0; 2894 } 2895 #endif 2896 2897 /* 2898 * Initiate an asynchronous filesystem sync and, with hysteresis, 2899 * stall if the internal data structure count becomes too bloated. 2900 */ 2901 void 2902 hammer2_pfs_memory_wait(hammer2_pfs_t *pmp) 2903 { 2904 uint32_t waiting; 2905 int pcatch; 2906 int error; 2907 int started; 2908 2909 if (pmp == NULL || pmp->mp == NULL) 2910 return; 2911 2912 started = 0; 2913 2914 for (;;) { 2915 waiting = pmp->inmem_dirty_chains & HAMMER2_DIRTYCHAIN_MASK; 2916 cpu_ccfence(); 2917 2918 /* 2919 * Start the syncer running at 1/2 the limit to try 2920 * to avoid sleeping. 2921 */ 2922 if (waiting > hammer2_limit_dirty_chains / 2 || 2923 pmp->sideq_count > hammer2_limit_dirty_inodes / 2) 2924 { 2925 trigger_syncer(pmp->mp); 2926 } 2927 2928 /* 2929 * Stall at the limit waiting for the counts to drop. 2930 * This code will typically be woken up once the count 2931 * drops below 3/4 the limit, or in one second. 2932 */ 2933 if (waiting < hammer2_limit_dirty_chains && 2934 pmp->sideq_count < hammer2_limit_dirty_inodes) 2935 { 2936 break; 2937 } 2938 2939 if (started == 0) { 2940 trigger_syncer_start(pmp->mp); 2941 started = 1; 2942 } 2943 2944 /* 2945 * Interlocked re-test, sleep, and retry. 2946 */ 2947 pcatch = curthread->td_proc ? PCATCH : 0; 2948 tsleep_interlock(&pmp->inmem_dirty_chains, pcatch); 2949 2950 atomic_set_int(&pmp->inmem_dirty_chains, 2951 HAMMER2_DIRTYCHAIN_WAITING); 2952 2953 if (waiting < hammer2_limit_dirty_chains && 2954 pmp->sideq_count < hammer2_limit_dirty_inodes) { 2955 break; 2956 } 2957 error = tsleep(&pmp->inmem_dirty_chains, 2958 PINTERLOCKED | pcatch, 2959 "h2memw", hz); 2960 if (error == ERESTART) 2961 break; 2962 } 2963 if (started) 2964 trigger_syncer_stop(pmp->mp); 2965 } 2966 2967 /* 2968 * Wake up any stalled frontend ops waiting, with hysteresis, using 2969 * 2/3 of the limit. 2970 */ 2971 void 2972 hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp, int count) 2973 { 2974 uint32_t waiting; 2975 2976 if (pmp) { 2977 waiting = atomic_fetchadd_int(&pmp->inmem_dirty_chains, count); 2978 /* don't need --waiting to test flag */ 2979 2980 if ((waiting & HAMMER2_DIRTYCHAIN_WAITING) && 2981 (pmp->inmem_dirty_chains & HAMMER2_DIRTYCHAIN_MASK) <= 2982 hammer2_limit_dirty_chains * 2 / 3 && 2983 pmp->sideq_count <= hammer2_limit_dirty_inodes * 2 / 3) { 2984 atomic_clear_int(&pmp->inmem_dirty_chains, 2985 HAMMER2_DIRTYCHAIN_WAITING); 2986 wakeup(&pmp->inmem_dirty_chains); 2987 } 2988 } 2989 } 2990 2991 void 2992 hammer2_pfs_memory_inc(hammer2_pfs_t *pmp) 2993 { 2994 if (pmp) { 2995 atomic_add_int(&pmp->inmem_dirty_chains, 1); 2996 } 2997 } 2998 2999 /* 3000 * Volume header data locks 3001 */ 3002 void 3003 hammer2_voldata_lock(hammer2_dev_t *hmp) 3004 { 3005 lockmgr(&hmp->vollk, LK_EXCLUSIVE); 3006 } 3007 3008 void 3009 hammer2_voldata_unlock(hammer2_dev_t *hmp) 3010 { 3011 lockmgr(&hmp->vollk, LK_RELEASE); 3012 } 3013 3014 /* 3015 * Caller indicates that the volume header is being modified. Flag 3016 * the related chain and adjust its transaction id. 3017 * 3018 * The transaction id is set to voldata.mirror_tid + 1, similar to 3019 * what hammer2_chain_modify() does. Be very careful here, volume 3020 * data can be updated independently of the rest of the filesystem. 3021 */ 3022 void 3023 hammer2_voldata_modify(hammer2_dev_t *hmp) 3024 { 3025 if ((hmp->vchain.flags & HAMMER2_CHAIN_MODIFIED) == 0) { 3026 atomic_add_long(&hammer2_count_modified_chains, 1); 3027 atomic_set_int(&hmp->vchain.flags, HAMMER2_CHAIN_MODIFIED); 3028 hammer2_pfs_memory_inc(hmp->vchain.pmp); 3029 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid + 1; 3030 } 3031 } 3032 3033 /* 3034 * Returns 0 if the filesystem has tons of free space 3035 * Returns 1 if the filesystem has less than 10% remaining 3036 * Returns 2 if the filesystem has less than 2%/5% (user/root) remaining. 3037 */ 3038 int 3039 hammer2_vfs_enospace(hammer2_inode_t *ip, off_t bytes, struct ucred *cred) 3040 { 3041 hammer2_pfs_t *pmp; 3042 hammer2_dev_t *hmp; 3043 hammer2_off_t free_reserved; 3044 hammer2_off_t free_nominal; 3045 int i; 3046 3047 pmp = ip->pmp; 3048 3049 if (/*XXX*/ 1 || pmp->free_ticks == 0 || pmp->free_ticks != ticks) { 3050 free_reserved = HAMMER2_SEGSIZE; 3051 free_nominal = 0x7FFFFFFFFFFFFFFFLLU; 3052 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) { 3053 hmp = pmp->pfs_hmps[i]; 3054 if (hmp == NULL) 3055 continue; 3056 if (pmp->pfs_types[i] != HAMMER2_PFSTYPE_MASTER && 3057 pmp->pfs_types[i] != HAMMER2_PFSTYPE_SOFT_MASTER) 3058 continue; 3059 3060 if (free_nominal > hmp->voldata.allocator_free) 3061 free_nominal = hmp->voldata.allocator_free; 3062 if (free_reserved < hmp->free_reserved) 3063 free_reserved = hmp->free_reserved; 3064 } 3065 3066 /* 3067 * SMP races ok 3068 */ 3069 pmp->free_reserved = free_reserved; 3070 pmp->free_nominal = free_nominal; 3071 pmp->free_ticks = ticks; 3072 } else { 3073 free_reserved = pmp->free_reserved; 3074 free_nominal = pmp->free_nominal; 3075 } 3076 if (cred && cred->cr_uid != 0) { 3077 if ((int64_t)(free_nominal - bytes) < 3078 (int64_t)free_reserved) { 3079 return 2; 3080 } 3081 } else { 3082 if ((int64_t)(free_nominal - bytes) < 3083 (int64_t)free_reserved / 2) { 3084 return 2; 3085 } 3086 } 3087 if ((int64_t)(free_nominal - bytes) < (int64_t)free_reserved * 2) 3088 return 1; 3089 return 0; 3090 } 3091