1 /* 2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/sys/vfs/hammer/hammer_vfsops.c,v 1.74 2008/11/13 02:18:43 dillon Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/vnode.h> 41 #include <sys/mount.h> 42 #include <sys/malloc.h> 43 #include <sys/nlookup.h> 44 #include <sys/fcntl.h> 45 #include <sys/sysctl.h> 46 #include <sys/buf.h> 47 #include <sys/buf2.h> 48 #include "hammer.h" 49 50 int hammer_supported_version = HAMMER_VOL_VERSION_TWO; 51 int hammer_debug_io; 52 int hammer_debug_general; 53 int hammer_debug_debug = 1; /* medium-error panics */ 54 int hammer_debug_inode; 55 int hammer_debug_locks; 56 int hammer_debug_btree; 57 int hammer_debug_tid; 58 int hammer_debug_recover; /* -1 will disable, +1 will force */ 59 int hammer_debug_recover_faults; 60 int hammer_error_panic; /* panic on error levels */ 61 int hammer_cluster_enable = 1; /* enable read clustering by default */ 62 int hammer_count_fsyncs; 63 int hammer_count_inodes; 64 int hammer_count_iqueued; 65 int hammer_count_reclaiming; 66 int hammer_count_records; 67 int hammer_count_record_datas; 68 int hammer_count_volumes; 69 int hammer_count_buffers; 70 int hammer_count_nodes; 71 int64_t hammer_count_extra_space_used; 72 int64_t hammer_stats_btree_lookups; 73 int64_t hammer_stats_btree_searches; 74 int64_t hammer_stats_btree_inserts; 75 int64_t hammer_stats_btree_deletes; 76 int64_t hammer_stats_btree_elements; 77 int64_t hammer_stats_btree_splits; 78 int64_t hammer_stats_btree_iterations; 79 int64_t hammer_stats_btree_root_iterations; 80 int64_t hammer_stats_record_iterations; 81 82 int64_t hammer_stats_file_read; 83 int64_t hammer_stats_file_write; 84 int64_t hammer_stats_file_iopsr; 85 int64_t hammer_stats_file_iopsw; 86 int64_t hammer_stats_disk_read; 87 int64_t hammer_stats_disk_write; 88 int64_t hammer_stats_inode_flushes; 89 int64_t hammer_stats_commits; 90 91 int hammer_count_dirtybufspace; /* global */ 92 int hammer_count_refedbufs; /* global */ 93 int hammer_count_reservations; 94 int hammer_count_io_running_read; 95 int hammer_count_io_running_write; 96 int hammer_count_io_locked; 97 int hammer_limit_dirtybufspace; /* per-mount */ 98 int hammer_limit_recs; /* as a whole XXX */ 99 int hammer_limit_inode_recs = 1024; /* per inode */ 100 int hammer_autoflush = 2000; /* auto flush */ 101 int hammer_bio_count; 102 int hammer_verify_zone; 103 int hammer_verify_data = 1; 104 int hammer_write_mode; 105 int hammer_yield_check = 16; 106 int hammer_fsync_mode; 107 int64_t hammer_contention_count; 108 int64_t hammer_zone_limit; 109 110 SYSCTL_NODE(_vfs, OID_AUTO, hammer, CTLFLAG_RW, 0, "HAMMER filesystem"); 111 SYSCTL_INT(_vfs_hammer, OID_AUTO, supported_version, CTLFLAG_RD, 112 &hammer_supported_version, 0, ""); 113 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_general, CTLFLAG_RW, 114 &hammer_debug_general, 0, ""); 115 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_io, CTLFLAG_RW, 116 &hammer_debug_io, 0, ""); 117 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_debug, CTLFLAG_RW, 118 &hammer_debug_debug, 0, ""); 119 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_inode, CTLFLAG_RW, 120 &hammer_debug_inode, 0, ""); 121 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_locks, CTLFLAG_RW, 122 &hammer_debug_locks, 0, ""); 123 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_btree, CTLFLAG_RW, 124 &hammer_debug_btree, 0, ""); 125 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_tid, CTLFLAG_RW, 126 &hammer_debug_tid, 0, ""); 127 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover, CTLFLAG_RW, 128 &hammer_debug_recover, 0, ""); 129 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover_faults, CTLFLAG_RW, 130 &hammer_debug_recover_faults, 0, ""); 131 SYSCTL_INT(_vfs_hammer, OID_AUTO, error_panic, CTLFLAG_RW, 132 &hammer_error_panic, 0, ""); 133 SYSCTL_INT(_vfs_hammer, OID_AUTO, cluster_enable, CTLFLAG_RW, 134 &hammer_cluster_enable, 0, ""); 135 136 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_dirtybufspace, CTLFLAG_RW, 137 &hammer_limit_dirtybufspace, 0, ""); 138 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_recs, CTLFLAG_RW, 139 &hammer_limit_recs, 0, ""); 140 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_inode_recs, CTLFLAG_RW, 141 &hammer_limit_inode_recs, 0, ""); 142 143 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_fsyncs, CTLFLAG_RD, 144 &hammer_count_fsyncs, 0, ""); 145 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD, 146 &hammer_count_inodes, 0, ""); 147 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD, 148 &hammer_count_iqueued, 0, ""); 149 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaiming, CTLFLAG_RD, 150 &hammer_count_reclaiming, 0, ""); 151 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD, 152 &hammer_count_records, 0, ""); 153 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD, 154 &hammer_count_record_datas, 0, ""); 155 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD, 156 &hammer_count_volumes, 0, ""); 157 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD, 158 &hammer_count_buffers, 0, ""); 159 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD, 160 &hammer_count_nodes, 0, ""); 161 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, count_extra_space_used, CTLFLAG_RD, 162 &hammer_count_extra_space_used, 0, ""); 163 164 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD, 165 &hammer_stats_btree_searches, 0, ""); 166 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD, 167 &hammer_stats_btree_lookups, 0, ""); 168 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD, 169 &hammer_stats_btree_inserts, 0, ""); 170 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD, 171 &hammer_stats_btree_deletes, 0, ""); 172 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD, 173 &hammer_stats_btree_elements, 0, ""); 174 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD, 175 &hammer_stats_btree_splits, 0, ""); 176 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD, 177 &hammer_stats_btree_iterations, 0, ""); 178 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_root_iterations, CTLFLAG_RD, 179 &hammer_stats_btree_root_iterations, 0, ""); 180 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD, 181 &hammer_stats_record_iterations, 0, ""); 182 183 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_read, CTLFLAG_RD, 184 &hammer_stats_file_read, 0, ""); 185 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_write, CTLFLAG_RD, 186 &hammer_stats_file_write, 0, ""); 187 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsr, CTLFLAG_RD, 188 &hammer_stats_file_iopsr, 0, ""); 189 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsw, CTLFLAG_RD, 190 &hammer_stats_file_iopsw, 0, ""); 191 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_read, CTLFLAG_RD, 192 &hammer_stats_disk_read, 0, ""); 193 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_write, CTLFLAG_RD, 194 &hammer_stats_disk_write, 0, ""); 195 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_inode_flushes, CTLFLAG_RD, 196 &hammer_stats_inode_flushes, 0, ""); 197 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_commits, CTLFLAG_RD, 198 &hammer_stats_commits, 0, ""); 199 200 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_dirtybufspace, CTLFLAG_RD, 201 &hammer_count_dirtybufspace, 0, ""); 202 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD, 203 &hammer_count_refedbufs, 0, ""); 204 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD, 205 &hammer_count_reservations, 0, ""); 206 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD, 207 &hammer_count_io_running_read, 0, ""); 208 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD, 209 &hammer_count_io_locked, 0, ""); 210 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD, 211 &hammer_count_io_running_write, 0, ""); 212 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW, 213 &hammer_zone_limit, 0, ""); 214 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW, 215 &hammer_contention_count, 0, ""); 216 SYSCTL_INT(_vfs_hammer, OID_AUTO, autoflush, CTLFLAG_RW, 217 &hammer_autoflush, 0, ""); 218 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_zone, CTLFLAG_RW, 219 &hammer_verify_zone, 0, ""); 220 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_data, CTLFLAG_RW, 221 &hammer_verify_data, 0, ""); 222 SYSCTL_INT(_vfs_hammer, OID_AUTO, write_mode, CTLFLAG_RW, 223 &hammer_write_mode, 0, ""); 224 SYSCTL_INT(_vfs_hammer, OID_AUTO, yield_check, CTLFLAG_RW, 225 &hammer_yield_check, 0, ""); 226 SYSCTL_INT(_vfs_hammer, OID_AUTO, fsync_mode, CTLFLAG_RW, 227 &hammer_fsync_mode, 0, ""); 228 229 KTR_INFO_MASTER(hammer); 230 231 /* 232 * VFS ABI 233 */ 234 static void hammer_free_hmp(struct mount *mp); 235 236 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data, 237 struct ucred *cred); 238 static int hammer_vfs_unmount(struct mount *mp, int mntflags); 239 static int hammer_vfs_root(struct mount *mp, struct vnode **vpp); 240 static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, 241 struct ucred *cred); 242 static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, 243 struct ucred *cred); 244 static int hammer_vfs_sync(struct mount *mp, int waitfor); 245 static int hammer_vfs_vget(struct mount *mp, struct vnode *dvp, 246 ino_t ino, struct vnode **vpp); 247 static int hammer_vfs_init(struct vfsconf *conf); 248 static int hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 249 struct fid *fhp, struct vnode **vpp); 250 static int hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp); 251 static int hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 252 int *exflagsp, struct ucred **credanonp); 253 254 255 static struct vfsops hammer_vfsops = { 256 .vfs_mount = hammer_vfs_mount, 257 .vfs_unmount = hammer_vfs_unmount, 258 .vfs_root = hammer_vfs_root, 259 .vfs_statfs = hammer_vfs_statfs, 260 .vfs_statvfs = hammer_vfs_statvfs, 261 .vfs_sync = hammer_vfs_sync, 262 .vfs_vget = hammer_vfs_vget, 263 .vfs_init = hammer_vfs_init, 264 .vfs_vptofh = hammer_vfs_vptofh, 265 .vfs_fhtovp = hammer_vfs_fhtovp, 266 .vfs_checkexp = hammer_vfs_checkexp 267 }; 268 269 MALLOC_DEFINE(M_HAMMER, "HAMMER-mount", ""); 270 271 VFS_SET(hammer_vfsops, hammer, 0); 272 MODULE_VERSION(hammer, 1); 273 274 static int 275 hammer_vfs_init(struct vfsconf *conf) 276 { 277 int n; 278 279 if (hammer_limit_recs == 0) { 280 hammer_limit_recs = nbuf * 25; 281 n = kmalloc_limit(M_HAMMER) / 512; 282 if (hammer_limit_recs > n) 283 hammer_limit_recs = n; 284 } 285 if (hammer_limit_dirtybufspace == 0) { 286 hammer_limit_dirtybufspace = hidirtybufspace / 2; 287 if (hammer_limit_dirtybufspace < 100) 288 hammer_limit_dirtybufspace = 100; 289 } 290 return(0); 291 } 292 293 static int 294 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data, 295 struct ucred *cred) 296 { 297 struct hammer_mount_info info; 298 hammer_mount_t hmp; 299 hammer_volume_t rootvol; 300 struct vnode *rootvp; 301 struct vnode *devvp = NULL; 302 const char *upath; /* volume name in userspace */ 303 char *path; /* volume name in system space */ 304 int error; 305 int i; 306 int master_id; 307 int maxinodes; 308 309 /* 310 * Accept hammer_mount_info. mntpt is NULL for root mounts at boot. 311 */ 312 if (mntpt == NULL) { 313 if ((error = bdevvp(rootdev, &devvp))) { 314 kprintf("hammer_mountroot: can't find devvp\n"); 315 return (error); 316 } 317 mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */ 318 bzero(&info, sizeof(info)); 319 info.asof = 0; 320 info.hflags = 0; 321 info.nvolumes = 1; 322 } else { 323 if ((error = copyin(data, &info, sizeof(info))) != 0) 324 return (error); 325 } 326 327 /* 328 * updating or new mount 329 */ 330 if (mp->mnt_flag & MNT_UPDATE) { 331 hmp = (void *)mp->mnt_data; 332 KKASSERT(hmp != NULL); 333 } else { 334 if (info.nvolumes <= 0 || info.nvolumes >= 32768) 335 return (EINVAL); 336 hmp = NULL; 337 } 338 339 /* 340 * master-id validation. The master id may not be changed by a 341 * mount update. 342 */ 343 if (info.hflags & HMNT_MASTERID) { 344 if (hmp && hmp->master_id != info.master_id) { 345 kprintf("hammer: cannot change master id " 346 "with mount update\n"); 347 return(EINVAL); 348 } 349 master_id = info.master_id; 350 if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS) 351 return (EINVAL); 352 } else { 353 if (hmp) 354 master_id = hmp->master_id; 355 else 356 master_id = 0; 357 } 358 359 /* 360 * Interal mount data structure 361 */ 362 if (hmp == NULL) { 363 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO); 364 mp->mnt_data = (qaddr_t)hmp; 365 hmp->mp = mp; 366 /*TAILQ_INIT(&hmp->recycle_list);*/ 367 368 /* 369 * Make sure kmalloc type limits are set appropriately. If root 370 * increases the vnode limit you may have to do a dummy remount 371 * to adjust the HAMMER inode limit. 372 */ 373 kmalloc_create(&hmp->m_misc, "HAMMER-others"); 374 kmalloc_create(&hmp->m_inodes, "HAMMER-inodes"); 375 376 maxinodes = desiredvnodes + desiredvnodes / 5 + 377 HAMMER_RECLAIM_WAIT; 378 kmalloc_raise_limit(hmp->m_inodes, 379 maxinodes * sizeof(struct hammer_inode)); 380 381 hmp->root_btree_beg.localization = 0x00000000U; 382 hmp->root_btree_beg.obj_id = -0x8000000000000000LL; 383 hmp->root_btree_beg.key = -0x8000000000000000LL; 384 hmp->root_btree_beg.create_tid = 1; 385 hmp->root_btree_beg.delete_tid = 1; 386 hmp->root_btree_beg.rec_type = 0; 387 hmp->root_btree_beg.obj_type = 0; 388 389 hmp->root_btree_end.localization = 0xFFFFFFFFU; 390 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL; 391 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL; 392 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL; 393 hmp->root_btree_end.delete_tid = 0; /* special case */ 394 hmp->root_btree_end.rec_type = 0xFFFFU; 395 hmp->root_btree_end.obj_type = 0; 396 397 hmp->krate.freq = 1; /* maximum reporting rate (hz) */ 398 hmp->krate.count = -16; /* initial burst */ 399 400 hmp->sync_lock.refs = 1; 401 hmp->free_lock.refs = 1; 402 hmp->undo_lock.refs = 1; 403 hmp->blkmap_lock.refs = 1; 404 405 TAILQ_INIT(&hmp->delay_list); 406 TAILQ_INIT(&hmp->flush_group_list); 407 TAILQ_INIT(&hmp->objid_cache_list); 408 TAILQ_INIT(&hmp->undo_lru_list); 409 TAILQ_INIT(&hmp->reclaim_list); 410 } 411 hmp->hflags &= ~HMNT_USERFLAGS; 412 hmp->hflags |= info.hflags & HMNT_USERFLAGS; 413 414 hmp->master_id = master_id; 415 416 if (info.asof) { 417 mp->mnt_flag |= MNT_RDONLY; 418 hmp->asof = info.asof; 419 } else { 420 hmp->asof = HAMMER_MAX_TID; 421 } 422 423 /* 424 * Re-open read-write if originally read-only, or vise-versa. 425 */ 426 if (mp->mnt_flag & MNT_UPDATE) { 427 error = 0; 428 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 429 kprintf("HAMMER read-only -> read-write\n"); 430 hmp->ronly = 0; 431 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 432 hammer_adjust_volume_mode, NULL); 433 rootvol = hammer_get_root_volume(hmp, &error); 434 if (rootvol) { 435 hammer_recover_flush_buffers(hmp, rootvol, 1); 436 bcopy(rootvol->ondisk->vol0_blockmap, 437 hmp->blockmap, 438 sizeof(hmp->blockmap)); 439 hammer_rel_volume(rootvol, 0); 440 } 441 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 442 hammer_reload_inode, NULL); 443 /* kernel clears MNT_RDONLY */ 444 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 445 kprintf("HAMMER read-write -> read-only\n"); 446 hmp->ronly = 1; /* messy */ 447 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 448 hammer_reload_inode, NULL); 449 hmp->ronly = 0; 450 hammer_flusher_sync(hmp); 451 hammer_flusher_sync(hmp); 452 hammer_flusher_sync(hmp); 453 hmp->ronly = 1; 454 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 455 hammer_adjust_volume_mode, NULL); 456 } 457 return(error); 458 } 459 460 RB_INIT(&hmp->rb_vols_root); 461 RB_INIT(&hmp->rb_inos_root); 462 RB_INIT(&hmp->rb_nods_root); 463 RB_INIT(&hmp->rb_undo_root); 464 RB_INIT(&hmp->rb_resv_root); 465 RB_INIT(&hmp->rb_bufs_root); 466 RB_INIT(&hmp->rb_pfsm_root); 467 468 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 469 470 TAILQ_INIT(&hmp->volu_list); 471 TAILQ_INIT(&hmp->undo_list); 472 TAILQ_INIT(&hmp->data_list); 473 TAILQ_INIT(&hmp->meta_list); 474 TAILQ_INIT(&hmp->lose_list); 475 476 /* 477 * Load volumes 478 */ 479 path = objcache_get(namei_oc, M_WAITOK); 480 hmp->nvolumes = -1; 481 for (i = 0; i < info.nvolumes; ++i) { 482 if (mntpt == NULL) { 483 /* 484 * Root mount. 485 * Only one volume; and no need for copyin. 486 */ 487 KKASSERT(info.nvolumes == 1); 488 ksnprintf(path, MAXPATHLEN, "/dev/%s", 489 mp->mnt_stat.f_mntfromname); 490 error = 0; 491 } else { 492 error = copyin(&info.volumes[i], &upath, 493 sizeof(char *)); 494 if (error == 0) 495 error = copyinstr(upath, path, 496 MAXPATHLEN, NULL); 497 } 498 if (error == 0) 499 error = hammer_install_volume(hmp, path, devvp); 500 if (error) 501 break; 502 } 503 objcache_put(namei_oc, path); 504 505 /* 506 * Make sure we found a root volume 507 */ 508 if (error == 0 && hmp->rootvol == NULL) { 509 kprintf("hammer_mount: No root volume found!\n"); 510 error = EINVAL; 511 } 512 513 /* 514 * Check that all required volumes are available 515 */ 516 if (error == 0 && hammer_mountcheck_volumes(hmp)) { 517 kprintf("hammer_mount: Missing volumes, cannot mount!\n"); 518 error = EINVAL; 519 } 520 521 if (error) { 522 hammer_free_hmp(mp); 523 return (error); 524 } 525 526 /* 527 * No errors, setup enough of the mount point so we can lookup the 528 * root vnode. 529 */ 530 mp->mnt_iosize_max = MAXPHYS; 531 mp->mnt_kern_flag |= MNTK_FSMID; 532 533 /* 534 * note: f_iosize is used by vnode_pager_haspage() when constructing 535 * its VOP_BMAP call. 536 */ 537 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE; 538 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE; 539 540 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE; 541 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE; 542 543 mp->mnt_maxsymlinklen = 255; 544 mp->mnt_flag |= MNT_LOCAL; 545 546 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops); 547 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops); 548 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops); 549 550 /* 551 * The root volume's ondisk pointer is only valid if we hold a 552 * reference to it. 553 */ 554 rootvol = hammer_get_root_volume(hmp, &error); 555 if (error) 556 goto failed; 557 558 /* 559 * Perform any necessary UNDO operations. The recovery code does 560 * call hammer_undo_lookup() so we have to pre-cache the blockmap, 561 * and then re-copy it again after recovery is complete. 562 * 563 * If this is a read-only mount the UNDO information is retained 564 * in memory in the form of dirty buffer cache buffers, and not 565 * written back to the media. 566 */ 567 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 568 sizeof(hmp->blockmap)); 569 570 /* 571 * Check filesystem version 572 */ 573 hmp->version = rootvol->ondisk->vol_version; 574 if (hmp->version < HAMMER_VOL_VERSION_MIN || 575 hmp->version > HAMMER_VOL_VERSION_MAX) { 576 kprintf("HAMMER: mount unsupported fs version %d\n", 577 hmp->version); 578 error = ERANGE; 579 goto done; 580 } 581 582 /* 583 * The undo_rec_limit limits the size of flush groups to avoid 584 * blowing out the UNDO FIFO. This calculation is typically in 585 * the tens of thousands and is designed primarily when small 586 * HAMMER filesystems are created. 587 */ 588 hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100; 589 if (hammer_debug_general & 0x0001) 590 kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit); 591 592 error = hammer_recover(hmp, rootvol); 593 if (error) { 594 kprintf("Failed to recover HAMMER filesystem on mount\n"); 595 goto done; 596 } 597 598 /* 599 * Finish setup now that we have a good root volume. 600 * 601 * The top 16 bits of fsid.val[1] is a pfs id. 602 */ 603 ksnprintf(mp->mnt_stat.f_mntfromname, 604 sizeof(mp->mnt_stat.f_mntfromname), "%s", 605 rootvol->ondisk->vol_name); 606 mp->mnt_stat.f_fsid.val[0] = 607 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8); 608 mp->mnt_stat.f_fsid.val[1] = 609 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8); 610 mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF; 611 612 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid; 613 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid, 614 sizeof(mp->mnt_vstat.f_fsid_uuid)); 615 616 /* 617 * Certain often-modified fields in the root volume are cached in 618 * the hammer_mount structure so we do not have to generate lots 619 * of little UNDO structures for them. 620 * 621 * Recopy after recovery. This also has the side effect of 622 * setting our cached undo FIFO's first_offset, which serves to 623 * placemark the FIFO start for the NEXT flush cycle while the 624 * on-disk first_offset represents the LAST flush cycle. 625 */ 626 hmp->next_tid = rootvol->ondisk->vol0_next_tid; 627 hmp->flush_tid1 = hmp->next_tid; 628 hmp->flush_tid2 = hmp->next_tid; 629 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 630 sizeof(hmp->blockmap)); 631 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks; 632 633 hammer_flusher_create(hmp); 634 635 /* 636 * Locate the root directory using the root cluster's B-Tree as a 637 * starting point. The root directory uses an obj_id of 1. 638 * 639 * FUTURE: Leave the root directory cached referenced but unlocked 640 * in hmp->rootvp (need to flush it on unmount). 641 */ 642 error = hammer_vfs_vget(mp, NULL, 1, &rootvp); 643 if (error) 644 goto done; 645 vput(rootvp); 646 /*vn_unlock(hmp->rootvp);*/ 647 648 done: 649 hammer_rel_volume(rootvol, 0); 650 failed: 651 /* 652 * Cleanup and return. 653 */ 654 if (error) 655 hammer_free_hmp(mp); 656 return (error); 657 } 658 659 static int 660 hammer_vfs_unmount(struct mount *mp, int mntflags) 661 { 662 #if 0 663 struct hammer_mount *hmp = (void *)mp->mnt_data; 664 #endif 665 int flags; 666 int error; 667 668 /* 669 * Clean out the vnodes 670 */ 671 flags = 0; 672 if (mntflags & MNT_FORCE) 673 flags |= FORCECLOSE; 674 if ((error = vflush(mp, 0, flags)) != 0) 675 return (error); 676 677 /* 678 * Clean up the internal mount structure and related entities. This 679 * may issue I/O. 680 */ 681 hammer_free_hmp(mp); 682 return(0); 683 } 684 685 /* 686 * Clean up the internal mount structure and disassociate it from the mount. 687 * This may issue I/O. 688 */ 689 static void 690 hammer_free_hmp(struct mount *mp) 691 { 692 struct hammer_mount *hmp = (void *)mp->mnt_data; 693 hammer_flush_group_t flg; 694 int count; 695 int dummy; 696 697 /* 698 * Flush anything dirty. This won't even run if the 699 * filesystem errored-out. 700 */ 701 count = 0; 702 while (hammer_flusher_haswork(hmp)) { 703 hammer_flusher_sync(hmp); 704 ++count; 705 if (count >= 5) { 706 if (count == 5) 707 kprintf("HAMMER: umount flushing."); 708 else 709 kprintf("."); 710 tsleep(&dummy, 0, "hmrufl", hz); 711 } 712 if (count == 30) { 713 kprintf("giving up\n"); 714 break; 715 } 716 } 717 if (count >= 5 && count < 30) 718 kprintf("\n"); 719 720 /* 721 * If the mount had a critical error we have to destroy any 722 * remaining inodes before we can finish cleaning up the flusher. 723 */ 724 if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) { 725 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 726 hammer_destroy_inode_callback, NULL); 727 } 728 729 /* 730 * There shouldn't be any inodes left now and any left over 731 * flush groups should now be empty. 732 */ 733 KKASSERT(RB_EMPTY(&hmp->rb_inos_root)); 734 while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) { 735 TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry); 736 KKASSERT(TAILQ_EMPTY(&flg->flush_list)); 737 if (flg->refs) { 738 kprintf("HAMMER: Warning, flush_group %p was " 739 "not empty on umount!\n", flg); 740 } 741 kfree(flg, hmp->m_misc); 742 } 743 744 /* 745 * We can finally destroy the flusher 746 */ 747 hammer_flusher_destroy(hmp); 748 749 /* 750 * We may have held recovered buffers due to a read-only mount. 751 * These must be discarded. 752 */ 753 if (hmp->ronly) 754 hammer_recover_flush_buffers(hmp, NULL, -1); 755 756 /* 757 * Unload buffers and then volumes 758 */ 759 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL, 760 hammer_unload_buffer, NULL); 761 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 762 hammer_unload_volume, NULL); 763 764 mp->mnt_data = NULL; 765 mp->mnt_flag &= ~MNT_LOCAL; 766 hmp->mp = NULL; 767 hammer_destroy_objid_cache(hmp); 768 kmalloc_destroy(&hmp->m_misc); 769 kmalloc_destroy(&hmp->m_inodes); 770 kfree(hmp, M_HAMMER); 771 } 772 773 /* 774 * Report critical errors. ip may be NULL. 775 */ 776 void 777 hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip, 778 int error, const char *msg) 779 { 780 hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR; 781 782 krateprintf(&hmp->krate, 783 "HAMMER(%s): Critical error inode=%jd error=%d %s\n", 784 hmp->mp->mnt_stat.f_mntfromname, 785 (intmax_t)(ip ? ip->obj_id : -1), 786 error, msg); 787 788 if (hmp->ronly == 0) { 789 hmp->ronly = 2; /* special errored read-only mode */ 790 hmp->mp->mnt_flag |= MNT_RDONLY; 791 kprintf("HAMMER(%s): Forcing read-only mode\n", 792 hmp->mp->mnt_stat.f_mntfromname); 793 } 794 hmp->error = error; 795 if (hammer_error_panic > 2) 796 Debugger("Entering debugger"); 797 } 798 799 800 /* 801 * Obtain a vnode for the specified inode number. An exclusively locked 802 * vnode is returned. 803 */ 804 int 805 hammer_vfs_vget(struct mount *mp, struct vnode *dvp, 806 ino_t ino, struct vnode **vpp) 807 { 808 struct hammer_transaction trans; 809 struct hammer_mount *hmp = (void *)mp->mnt_data; 810 struct hammer_inode *ip; 811 int error; 812 u_int32_t localization; 813 814 hammer_simple_transaction(&trans, hmp); 815 816 /* 817 * If a directory vnode is supplied (mainly NFS) then we can acquire 818 * the PFS domain from it. Otherwise we would only be able to vget 819 * inodes in the root PFS. 820 */ 821 if (dvp) { 822 localization = HAMMER_DEF_LOCALIZATION + 823 VTOI(dvp)->obj_localization; 824 } else { 825 localization = HAMMER_DEF_LOCALIZATION; 826 } 827 828 /* 829 * Lookup the requested HAMMER inode. The structure must be 830 * left unlocked while we manipulate the related vnode to avoid 831 * a deadlock. 832 */ 833 ip = hammer_get_inode(&trans, NULL, ino, 834 hmp->asof, localization, 835 0, &error); 836 if (ip == NULL) { 837 *vpp = NULL; 838 hammer_done_transaction(&trans); 839 return(error); 840 } 841 error = hammer_get_vnode(ip, vpp); 842 hammer_rel_inode(ip, 0); 843 hammer_done_transaction(&trans); 844 return (error); 845 } 846 847 /* 848 * Return the root vnode for the filesystem. 849 * 850 * HAMMER stores the root vnode in the hammer_mount structure so 851 * getting it is easy. 852 */ 853 static int 854 hammer_vfs_root(struct mount *mp, struct vnode **vpp) 855 { 856 #if 0 857 struct hammer_mount *hmp = (void *)mp->mnt_data; 858 #endif 859 int error; 860 861 error = hammer_vfs_vget(mp, NULL, 1, vpp); 862 return (error); 863 } 864 865 static int 866 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 867 { 868 struct hammer_mount *hmp = (void *)mp->mnt_data; 869 hammer_volume_t volume; 870 hammer_volume_ondisk_t ondisk; 871 int error; 872 int64_t bfree; 873 int64_t breserved; 874 875 volume = hammer_get_root_volume(hmp, &error); 876 if (error) 877 return(error); 878 ondisk = volume->ondisk; 879 880 /* 881 * Basic stats 882 */ 883 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved); 884 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes; 885 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 886 hammer_rel_volume(volume, 0); 887 888 mp->mnt_stat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE; 889 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree; 890 if (mp->mnt_stat.f_files < 0) 891 mp->mnt_stat.f_files = 0; 892 893 *sbp = mp->mnt_stat; 894 return(0); 895 } 896 897 static int 898 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 899 { 900 struct hammer_mount *hmp = (void *)mp->mnt_data; 901 hammer_volume_t volume; 902 hammer_volume_ondisk_t ondisk; 903 int error; 904 int64_t bfree; 905 int64_t breserved; 906 907 volume = hammer_get_root_volume(hmp, &error); 908 if (error) 909 return(error); 910 ondisk = volume->ondisk; 911 912 /* 913 * Basic stats 914 */ 915 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved); 916 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes; 917 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 918 hammer_rel_volume(volume, 0); 919 920 mp->mnt_vstat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE; 921 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree; 922 if (mp->mnt_vstat.f_files < 0) 923 mp->mnt_vstat.f_files = 0; 924 *sbp = mp->mnt_vstat; 925 return(0); 926 } 927 928 /* 929 * Sync the filesystem. Currently we have to run it twice, the second 930 * one will advance the undo start index to the end index, so if a crash 931 * occurs no undos will be run on mount. 932 * 933 * We do not sync the filesystem if we are called from a panic. If we did 934 * we might end up blowing up a sync that was already in progress. 935 */ 936 static int 937 hammer_vfs_sync(struct mount *mp, int waitfor) 938 { 939 struct hammer_mount *hmp = (void *)mp->mnt_data; 940 int error; 941 942 if (panicstr == NULL) { 943 error = hammer_sync_hmp(hmp, waitfor); 944 } else { 945 error = EIO; 946 } 947 return (error); 948 } 949 950 /* 951 * Convert a vnode to a file handle. 952 */ 953 static int 954 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp) 955 { 956 hammer_inode_t ip; 957 958 KKASSERT(MAXFIDSZ >= 16); 959 ip = VTOI(vp); 960 fhp->fid_len = offsetof(struct fid, fid_data[16]); 961 fhp->fid_ext = ip->obj_localization >> 16; 962 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id)); 963 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof)); 964 return(0); 965 } 966 967 968 /* 969 * Convert a file handle back to a vnode. 970 * 971 * Use rootvp to enforce PFS isolation when a PFS is exported via a 972 * null mount. 973 */ 974 static int 975 hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 976 struct fid *fhp, struct vnode **vpp) 977 { 978 struct hammer_transaction trans; 979 struct hammer_inode *ip; 980 struct hammer_inode_info info; 981 int error; 982 u_int32_t localization; 983 984 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id)); 985 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof)); 986 if (rootvp) 987 localization = VTOI(rootvp)->obj_localization; 988 else 989 localization = (u_int32_t)fhp->fid_ext << 16; 990 991 hammer_simple_transaction(&trans, (void *)mp->mnt_data); 992 993 /* 994 * Get/allocate the hammer_inode structure. The structure must be 995 * unlocked while we manipulate the related vnode to avoid a 996 * deadlock. 997 */ 998 ip = hammer_get_inode(&trans, NULL, info.obj_id, 999 info.obj_asof, localization, 0, &error); 1000 if (ip == NULL) { 1001 *vpp = NULL; 1002 return(error); 1003 } 1004 error = hammer_get_vnode(ip, vpp); 1005 hammer_rel_inode(ip, 0); 1006 hammer_done_transaction(&trans); 1007 return (error); 1008 } 1009 1010 static int 1011 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 1012 int *exflagsp, struct ucred **credanonp) 1013 { 1014 hammer_mount_t hmp = (void *)mp->mnt_data; 1015 struct netcred *np; 1016 int error; 1017 1018 np = vfs_export_lookup(mp, &hmp->export, nam); 1019 if (np) { 1020 *exflagsp = np->netc_exflags; 1021 *credanonp = &np->netc_anon; 1022 error = 0; 1023 } else { 1024 error = EACCES; 1025 } 1026 return (error); 1027 1028 } 1029 1030 int 1031 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export) 1032 { 1033 hammer_mount_t hmp = (void *)mp->mnt_data; 1034 int error; 1035 1036 switch(op) { 1037 case MOUNTCTL_SET_EXPORT: 1038 error = vfs_export(mp, &hmp->export, export); 1039 break; 1040 default: 1041 error = EOPNOTSUPP; 1042 break; 1043 } 1044 return(error); 1045 } 1046 1047