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 1.69 2008/07/27 23:01:25 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_debug_io; 51 int hammer_debug_general; 52 int hammer_debug_debug = 1; /* medium-error panics */ 53 int hammer_debug_inode; 54 int hammer_debug_locks; 55 int hammer_debug_btree; 56 int hammer_debug_tid; 57 int hammer_debug_recover; /* -1 will disable, +1 will force */ 58 int hammer_debug_recover_faults; 59 int hammer_cluster_enable = 1; /* enable read clustering by default */ 60 int hammer_count_fsyncs; 61 int hammer_count_inodes; 62 int hammer_count_iqueued; 63 int hammer_count_reclaiming; 64 int hammer_count_records; 65 int hammer_count_record_datas; 66 int hammer_count_volumes; 67 int hammer_count_buffers; 68 int hammer_count_nodes; 69 int64_t hammer_count_extra_space_used; 70 int64_t hammer_stats_btree_lookups; 71 int64_t hammer_stats_btree_searches; 72 int64_t hammer_stats_btree_inserts; 73 int64_t hammer_stats_btree_deletes; 74 int64_t hammer_stats_btree_elements; 75 int64_t hammer_stats_btree_splits; 76 int64_t hammer_stats_btree_iterations; 77 int64_t hammer_stats_record_iterations; 78 79 int64_t hammer_stats_file_read; 80 int64_t hammer_stats_file_write; 81 int64_t hammer_stats_file_iopsr; 82 int64_t hammer_stats_file_iopsw; 83 int64_t hammer_stats_disk_read; 84 int64_t hammer_stats_disk_write; 85 int64_t hammer_stats_inode_flushes; 86 int64_t hammer_stats_commits; 87 88 int hammer_count_dirtybufspace; /* global */ 89 int hammer_count_refedbufs; /* global */ 90 int hammer_count_reservations; 91 int hammer_count_io_running_read; 92 int hammer_count_io_running_write; 93 int hammer_count_io_locked; 94 int hammer_limit_dirtybufspace; /* per-mount */ 95 int hammer_limit_recs; /* as a whole XXX */ 96 int hammer_limit_iqueued; /* per-mount */ 97 int hammer_bio_count; 98 int hammer_verify_zone; 99 int hammer_verify_data = 1; 100 int hammer_write_mode; 101 int64_t hammer_contention_count; 102 int64_t hammer_zone_limit; 103 104 SYSCTL_NODE(_vfs, OID_AUTO, hammer, CTLFLAG_RW, 0, "HAMMER filesystem"); 105 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_general, CTLFLAG_RW, 106 &hammer_debug_general, 0, ""); 107 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_io, CTLFLAG_RW, 108 &hammer_debug_io, 0, ""); 109 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_debug, CTLFLAG_RW, 110 &hammer_debug_debug, 0, ""); 111 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_inode, CTLFLAG_RW, 112 &hammer_debug_inode, 0, ""); 113 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_locks, CTLFLAG_RW, 114 &hammer_debug_locks, 0, ""); 115 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_btree, CTLFLAG_RW, 116 &hammer_debug_btree, 0, ""); 117 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_tid, CTLFLAG_RW, 118 &hammer_debug_tid, 0, ""); 119 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover, CTLFLAG_RW, 120 &hammer_debug_recover, 0, ""); 121 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover_faults, CTLFLAG_RW, 122 &hammer_debug_recover_faults, 0, ""); 123 SYSCTL_INT(_vfs_hammer, OID_AUTO, cluster_enable, CTLFLAG_RW, 124 &hammer_cluster_enable, 0, ""); 125 126 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_dirtybufspace, CTLFLAG_RW, 127 &hammer_limit_dirtybufspace, 0, ""); 128 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_recs, CTLFLAG_RW, 129 &hammer_limit_recs, 0, ""); 130 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_iqueued, CTLFLAG_RW, 131 &hammer_limit_iqueued, 0, ""); 132 133 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_fsyncs, CTLFLAG_RD, 134 &hammer_count_fsyncs, 0, ""); 135 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD, 136 &hammer_count_inodes, 0, ""); 137 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD, 138 &hammer_count_iqueued, 0, ""); 139 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaiming, CTLFLAG_RD, 140 &hammer_count_reclaiming, 0, ""); 141 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD, 142 &hammer_count_records, 0, ""); 143 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD, 144 &hammer_count_record_datas, 0, ""); 145 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD, 146 &hammer_count_volumes, 0, ""); 147 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD, 148 &hammer_count_buffers, 0, ""); 149 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD, 150 &hammer_count_nodes, 0, ""); 151 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, count_extra_space_used, CTLFLAG_RD, 152 &hammer_count_extra_space_used, 0, ""); 153 154 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD, 155 &hammer_stats_btree_searches, 0, ""); 156 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD, 157 &hammer_stats_btree_lookups, 0, ""); 158 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD, 159 &hammer_stats_btree_inserts, 0, ""); 160 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD, 161 &hammer_stats_btree_deletes, 0, ""); 162 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD, 163 &hammer_stats_btree_elements, 0, ""); 164 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD, 165 &hammer_stats_btree_splits, 0, ""); 166 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD, 167 &hammer_stats_btree_iterations, 0, ""); 168 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD, 169 &hammer_stats_record_iterations, 0, ""); 170 171 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_read, CTLFLAG_RD, 172 &hammer_stats_file_read, 0, ""); 173 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_write, CTLFLAG_RD, 174 &hammer_stats_file_write, 0, ""); 175 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsr, CTLFLAG_RD, 176 &hammer_stats_file_iopsr, 0, ""); 177 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsw, CTLFLAG_RD, 178 &hammer_stats_file_iopsw, 0, ""); 179 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_read, CTLFLAG_RD, 180 &hammer_stats_disk_read, 0, ""); 181 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_write, CTLFLAG_RD, 182 &hammer_stats_disk_write, 0, ""); 183 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_inode_flushes, CTLFLAG_RD, 184 &hammer_stats_inode_flushes, 0, ""); 185 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_commits, CTLFLAG_RD, 186 &hammer_stats_commits, 0, ""); 187 188 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_dirtybufspace, CTLFLAG_RD, 189 &hammer_count_dirtybufspace, 0, ""); 190 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD, 191 &hammer_count_refedbufs, 0, ""); 192 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD, 193 &hammer_count_reservations, 0, ""); 194 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD, 195 &hammer_count_io_running_read, 0, ""); 196 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD, 197 &hammer_count_io_locked, 0, ""); 198 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD, 199 &hammer_count_io_running_write, 0, ""); 200 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW, 201 &hammer_zone_limit, 0, ""); 202 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW, 203 &hammer_contention_count, 0, ""); 204 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_zone, CTLFLAG_RW, 205 &hammer_verify_zone, 0, ""); 206 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_data, CTLFLAG_RW, 207 &hammer_verify_data, 0, ""); 208 SYSCTL_INT(_vfs_hammer, OID_AUTO, write_mode, CTLFLAG_RW, 209 &hammer_write_mode, 0, ""); 210 211 KTR_INFO_MASTER(hammer); 212 213 /* 214 * VFS ABI 215 */ 216 static void hammer_free_hmp(struct mount *mp); 217 218 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data, 219 struct ucred *cred); 220 static int hammer_vfs_unmount(struct mount *mp, int mntflags); 221 static int hammer_vfs_root(struct mount *mp, struct vnode **vpp); 222 static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, 223 struct ucred *cred); 224 static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, 225 struct ucred *cred); 226 static int hammer_vfs_sync(struct mount *mp, int waitfor); 227 static int hammer_vfs_vget(struct mount *mp, ino_t ino, 228 struct vnode **vpp); 229 static int hammer_vfs_init(struct vfsconf *conf); 230 static int hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp, 231 struct vnode **vpp); 232 static int hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp); 233 static int hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 234 int *exflagsp, struct ucred **credanonp); 235 236 237 static struct vfsops hammer_vfsops = { 238 .vfs_mount = hammer_vfs_mount, 239 .vfs_unmount = hammer_vfs_unmount, 240 .vfs_root = hammer_vfs_root, 241 .vfs_statfs = hammer_vfs_statfs, 242 .vfs_statvfs = hammer_vfs_statvfs, 243 .vfs_sync = hammer_vfs_sync, 244 .vfs_vget = hammer_vfs_vget, 245 .vfs_init = hammer_vfs_init, 246 .vfs_vptofh = hammer_vfs_vptofh, 247 .vfs_fhtovp = hammer_vfs_fhtovp, 248 .vfs_checkexp = hammer_vfs_checkexp 249 }; 250 251 MALLOC_DEFINE(M_HAMMER, "hammer-general", "hammer general"); 252 MALLOC_DEFINE(M_HAMMER_INO, "hammer-inodes", "hammer inodes"); 253 254 VFS_SET(hammer_vfsops, hammer, 0); 255 MODULE_VERSION(hammer, 1); 256 257 static int 258 hammer_vfs_init(struct vfsconf *conf) 259 { 260 int n; 261 262 if (hammer_limit_recs == 0) { 263 hammer_limit_recs = nbuf * 25; 264 n = kmalloc_limit(M_HAMMER) / 512; 265 if (hammer_limit_recs > n) 266 hammer_limit_recs = n; 267 } 268 if (hammer_limit_dirtybufspace == 0) { 269 hammer_limit_dirtybufspace = hidirtybufspace / 2; 270 if (hammer_limit_dirtybufspace < 100) 271 hammer_limit_dirtybufspace = 100; 272 } 273 if (hammer_limit_iqueued == 0) 274 hammer_limit_iqueued = desiredvnodes / 5; 275 return(0); 276 } 277 278 static int 279 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data, 280 struct ucred *cred) 281 { 282 struct hammer_mount_info info; 283 hammer_mount_t hmp; 284 hammer_volume_t rootvol; 285 struct vnode *rootvp; 286 struct vnode *devvp = NULL; 287 const char *upath; /* volume name in userspace */ 288 char *path; /* volume name in system space */ 289 int error; 290 int i; 291 int master_id; 292 if (mntpt == NULL) { 293 /* 294 * Root mount 295 */ 296 if ((error = bdevvp(rootdev, &devvp))) { 297 kprintf("hammer_mountroot: can't find devvp\n"); 298 return (error); 299 } 300 mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */ 301 bzero(&info, sizeof(info)); 302 info.asof = 0; 303 info.hflags = 0; 304 info.nvolumes = 1; 305 } else { 306 if ((error = copyin(data, &info, sizeof(info))) != 0) 307 return (error); 308 } 309 310 /* 311 * updating or new mount 312 */ 313 if (mp->mnt_flag & MNT_UPDATE) { 314 hmp = (void *)mp->mnt_data; 315 KKASSERT(hmp != NULL); 316 } else { 317 if (info.nvolumes <= 0 || info.nvolumes >= 32768) 318 return (EINVAL); 319 hmp = NULL; 320 } 321 322 /* 323 * master-id validation. The master id may not be changed by a 324 * mount update. 325 */ 326 if (info.hflags & HMNT_MASTERID) { 327 if (hmp && hmp->master_id != info.master_id) { 328 kprintf("hammer: cannot change master id " 329 "with mount update\n"); 330 return(EINVAL); 331 } 332 master_id = info.master_id; 333 if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS) 334 return (EINVAL); 335 } else { 336 if (hmp) 337 master_id = hmp->master_id; 338 else 339 master_id = 0; 340 } 341 342 /* 343 * Interal mount data structure 344 */ 345 if (hmp == NULL) { 346 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO); 347 mp->mnt_data = (qaddr_t)hmp; 348 hmp->mp = mp; 349 hmp->namekey_iterator = mycpu->gd_time_seconds; 350 /*TAILQ_INIT(&hmp->recycle_list);*/ 351 352 hmp->root_btree_beg.localization = 0x00000000U; 353 hmp->root_btree_beg.obj_id = -0x8000000000000000LL; 354 hmp->root_btree_beg.key = -0x8000000000000000LL; 355 hmp->root_btree_beg.create_tid = 1; 356 hmp->root_btree_beg.delete_tid = 1; 357 hmp->root_btree_beg.rec_type = 0; 358 hmp->root_btree_beg.obj_type = 0; 359 360 hmp->root_btree_end.localization = 0xFFFFFFFFU; 361 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL; 362 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL; 363 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL; 364 hmp->root_btree_end.delete_tid = 0; /* special case */ 365 hmp->root_btree_end.rec_type = 0xFFFFU; 366 hmp->root_btree_end.obj_type = 0; 367 368 hmp->krate.freq = 1; /* maximum reporting rate (hz) */ 369 hmp->krate.count = -16; /* initial burst */ 370 371 hmp->sync_lock.refs = 1; 372 hmp->free_lock.refs = 1; 373 hmp->undo_lock.refs = 1; 374 hmp->blkmap_lock.refs = 1; 375 376 TAILQ_INIT(&hmp->delay_list); 377 TAILQ_INIT(&hmp->flush_group_list); 378 TAILQ_INIT(&hmp->objid_cache_list); 379 TAILQ_INIT(&hmp->undo_lru_list); 380 TAILQ_INIT(&hmp->reclaim_list); 381 } 382 hmp->hflags &= ~HMNT_USERFLAGS; 383 hmp->hflags |= info.hflags & HMNT_USERFLAGS; 384 385 hmp->master_id = master_id; 386 387 if (info.asof) { 388 mp->mnt_flag |= MNT_RDONLY; 389 hmp->asof = info.asof; 390 } else { 391 hmp->asof = HAMMER_MAX_TID; 392 } 393 394 /* 395 * Re-open read-write if originally read-only, or vise-versa. 396 */ 397 if (mp->mnt_flag & MNT_UPDATE) { 398 error = 0; 399 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 400 kprintf("HAMMER read-only -> read-write\n"); 401 hmp->ronly = 0; 402 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 403 hammer_adjust_volume_mode, NULL); 404 rootvol = hammer_get_root_volume(hmp, &error); 405 if (rootvol) { 406 hammer_recover_flush_buffers(hmp, rootvol, 1); 407 bcopy(rootvol->ondisk->vol0_blockmap, 408 hmp->blockmap, 409 sizeof(hmp->blockmap)); 410 hammer_rel_volume(rootvol, 0); 411 } 412 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 413 hammer_reload_inode, NULL); 414 /* kernel clears MNT_RDONLY */ 415 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 416 kprintf("HAMMER read-write -> read-only\n"); 417 hmp->ronly = 1; /* messy */ 418 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 419 hammer_reload_inode, NULL); 420 hmp->ronly = 0; 421 hammer_flusher_sync(hmp); 422 hammer_flusher_sync(hmp); 423 hammer_flusher_sync(hmp); 424 hmp->ronly = 1; 425 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 426 hammer_adjust_volume_mode, NULL); 427 } 428 return(error); 429 } 430 431 RB_INIT(&hmp->rb_vols_root); 432 RB_INIT(&hmp->rb_inos_root); 433 RB_INIT(&hmp->rb_nods_root); 434 RB_INIT(&hmp->rb_undo_root); 435 RB_INIT(&hmp->rb_resv_root); 436 RB_INIT(&hmp->rb_bufs_root); 437 RB_INIT(&hmp->rb_pfsm_root); 438 439 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 440 441 TAILQ_INIT(&hmp->volu_list); 442 TAILQ_INIT(&hmp->undo_list); 443 TAILQ_INIT(&hmp->data_list); 444 TAILQ_INIT(&hmp->meta_list); 445 TAILQ_INIT(&hmp->lose_list); 446 447 /* 448 * Load volumes 449 */ 450 path = objcache_get(namei_oc, M_WAITOK); 451 hmp->nvolumes = -1; 452 for (i = 0; i < info.nvolumes; ++i) { 453 if (mntpt == NULL) { 454 /* 455 * Root mount. 456 * Only one volume; and no need for copyin. 457 */ 458 KKASSERT(info.nvolumes == 1); 459 ksnprintf(path, MAXPATHLEN, "/dev/%s", 460 mp->mnt_stat.f_mntfromname); 461 error = 0; 462 } else { 463 error = copyin(&info.volumes[i], &upath, 464 sizeof(char *)); 465 if (error == 0) 466 error = copyinstr(upath, path, 467 MAXPATHLEN, NULL); 468 } 469 if (error == 0) 470 error = hammer_install_volume(hmp, path, devvp); 471 if (error) 472 break; 473 } 474 objcache_put(namei_oc, path); 475 476 /* 477 * Make sure we found a root volume 478 */ 479 if (error == 0 && hmp->rootvol == NULL) { 480 kprintf("hammer_mount: No root volume found!\n"); 481 error = EINVAL; 482 } 483 484 /* 485 * Check that all required volumes are available 486 */ 487 if (error == 0 && hammer_mountcheck_volumes(hmp)) { 488 kprintf("hammer_mount: Missing volumes, cannot mount!\n"); 489 error = EINVAL; 490 } 491 492 if (error) { 493 hammer_free_hmp(mp); 494 return (error); 495 } 496 497 /* 498 * No errors, setup enough of the mount point so we can lookup the 499 * root vnode. 500 */ 501 mp->mnt_iosize_max = MAXPHYS; 502 mp->mnt_kern_flag |= MNTK_FSMID; 503 504 /* 505 * note: f_iosize is used by vnode_pager_haspage() when constructing 506 * its VOP_BMAP call. 507 */ 508 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE; 509 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE; 510 511 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE; 512 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE; 513 514 mp->mnt_maxsymlinklen = 255; 515 mp->mnt_flag |= MNT_LOCAL; 516 517 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops); 518 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops); 519 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops); 520 521 /* 522 * The root volume's ondisk pointer is only valid if we hold a 523 * reference to it. 524 */ 525 rootvol = hammer_get_root_volume(hmp, &error); 526 if (error) 527 goto failed; 528 529 /* 530 * Perform any necessary UNDO operations. The recovery code does 531 * call hammer_undo_lookup() so we have to pre-cache the blockmap, 532 * and then re-copy it again after recovery is complete. 533 * 534 * If this is a read-only mount the UNDO information is retained 535 * in memory in the form of dirty buffer cache buffers, and not 536 * written back to the media. 537 */ 538 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 539 sizeof(hmp->blockmap)); 540 541 /* 542 * The undo_rec_limit limits the size of flush groups to avoid 543 * blowing out the UNDO FIFO. This calculation is typically in 544 * the tens of thousands and is designed primarily when small 545 * HAMMER filesystems are created. 546 */ 547 hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100; 548 if (hammer_debug_general & 0x0001) 549 kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit); 550 551 error = hammer_recover(hmp, rootvol); 552 if (error) { 553 kprintf("Failed to recover HAMMER filesystem on mount\n"); 554 goto done; 555 } 556 557 /* 558 * Finish setup now that we have a good root volume. 559 * 560 * The top 16 bits of fsid.val[1] is a pfs id. 561 */ 562 ksnprintf(mp->mnt_stat.f_mntfromname, 563 sizeof(mp->mnt_stat.f_mntfromname), "%s", 564 rootvol->ondisk->vol_name); 565 mp->mnt_stat.f_fsid.val[0] = 566 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8); 567 mp->mnt_stat.f_fsid.val[1] = 568 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8); 569 mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF; 570 571 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid; 572 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid, 573 sizeof(mp->mnt_vstat.f_fsid_uuid)); 574 575 /* 576 * Certain often-modified fields in the root volume are cached in 577 * the hammer_mount structure so we do not have to generate lots 578 * of little UNDO structures for them. 579 * 580 * Recopy after recovery. This also has the side effect of 581 * setting our cached undo FIFO's first_offset, which serves to 582 * placemark the FIFO start for the NEXT flush cycle while the 583 * on-disk first_offset represents the LAST flush cycle. 584 */ 585 hmp->next_tid = rootvol->ondisk->vol0_next_tid; 586 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 587 sizeof(hmp->blockmap)); 588 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks; 589 590 hammer_flusher_create(hmp); 591 592 /* 593 * Locate the root directory using the root cluster's B-Tree as a 594 * starting point. The root directory uses an obj_id of 1. 595 * 596 * FUTURE: Leave the root directory cached referenced but unlocked 597 * in hmp->rootvp (need to flush it on unmount). 598 */ 599 error = hammer_vfs_vget(mp, 1, &rootvp); 600 if (error) 601 goto done; 602 vput(rootvp); 603 /*vn_unlock(hmp->rootvp);*/ 604 605 done: 606 hammer_rel_volume(rootvol, 0); 607 failed: 608 /* 609 * Cleanup and return. 610 */ 611 if (error) 612 hammer_free_hmp(mp); 613 return (error); 614 } 615 616 static int 617 hammer_vfs_unmount(struct mount *mp, int mntflags) 618 { 619 #if 0 620 struct hammer_mount *hmp = (void *)mp->mnt_data; 621 #endif 622 int flags; 623 int error; 624 625 /* 626 * Clean out the vnodes 627 */ 628 flags = 0; 629 if (mntflags & MNT_FORCE) 630 flags |= FORCECLOSE; 631 if ((error = vflush(mp, 0, flags)) != 0) 632 return (error); 633 634 /* 635 * Clean up the internal mount structure and related entities. This 636 * may issue I/O. 637 */ 638 hammer_free_hmp(mp); 639 return(0); 640 } 641 642 /* 643 * Clean up the internal mount structure and disassociate it from the mount. 644 * This may issue I/O. 645 */ 646 static void 647 hammer_free_hmp(struct mount *mp) 648 { 649 struct hammer_mount *hmp = (void *)mp->mnt_data; 650 hammer_flush_group_t flg; 651 int count; 652 653 /* 654 * Flush anything dirty. This won't even run if the 655 * filesystem errored-out. 656 */ 657 count = 0; 658 while (hammer_flusher_haswork(hmp)) { 659 hammer_flusher_sync(hmp); 660 ++count; 661 if (count >= 5) { 662 if (count == 5) 663 kprintf("HAMMER: umount flushing."); 664 else 665 kprintf("."); 666 tsleep(hmp, 0, "hmrufl", hz); 667 } 668 if (count == 30) { 669 kprintf("giving up\n"); 670 break; 671 } 672 } 673 if (count >= 5 && count < 30) 674 kprintf("\n"); 675 676 /* 677 * If the mount had a critical error we have to destroy any 678 * remaining inodes before we can finish cleaning up the flusher. 679 */ 680 if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) { 681 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 682 hammer_destroy_inode_callback, NULL); 683 } 684 685 /* 686 * There shouldn't be any inodes left now and any left over 687 * flush groups should now be empty. 688 */ 689 KKASSERT(RB_EMPTY(&hmp->rb_inos_root)); 690 while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) { 691 TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry); 692 KKASSERT(TAILQ_EMPTY(&flg->flush_list)); 693 if (flg->refs) { 694 kprintf("HAMMER: Warning, flush_group %p was " 695 "not empty on umount!\n", flg); 696 } 697 kfree(flg, M_HAMMER); 698 } 699 700 /* 701 * We can finally destroy the flusher 702 */ 703 hammer_flusher_destroy(hmp); 704 705 /* 706 * We may have held recovered buffers due to a read-only mount. 707 * These must be discarded. 708 */ 709 if (hmp->ronly) 710 hammer_recover_flush_buffers(hmp, NULL, -1); 711 712 /* 713 * Unload buffers and then volumes 714 */ 715 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL, 716 hammer_unload_buffer, NULL); 717 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 718 hammer_unload_volume, NULL); 719 720 mp->mnt_data = NULL; 721 mp->mnt_flag &= ~MNT_LOCAL; 722 hmp->mp = NULL; 723 hammer_destroy_objid_cache(hmp); 724 kfree(hmp, M_HAMMER); 725 } 726 727 /* 728 * Report critical errors. ip may be NULL. 729 */ 730 void 731 hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip, 732 int error, const char *msg) 733 { 734 hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR; 735 krateprintf(&hmp->krate, 736 "HAMMER(%s): Critical error inode=%lld %s\n", 737 hmp->mp->mnt_stat.f_mntfromname, 738 (ip ? ip->obj_id : -1), msg); 739 if (hmp->ronly == 0) { 740 hmp->ronly = 2; /* special errored read-only mode */ 741 hmp->mp->mnt_flag |= MNT_RDONLY; 742 kprintf("HAMMER(%s): Forcing read-only mode\n", 743 hmp->mp->mnt_stat.f_mntfromname); 744 } 745 hmp->error = error; 746 } 747 748 749 /* 750 * Obtain a vnode for the specified inode number. An exclusively locked 751 * vnode is returned. 752 */ 753 int 754 hammer_vfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 755 { 756 struct hammer_transaction trans; 757 struct hammer_mount *hmp = (void *)mp->mnt_data; 758 struct hammer_inode *ip; 759 int error; 760 761 hammer_simple_transaction(&trans, hmp); 762 763 /* 764 * Lookup the requested HAMMER inode. The structure must be 765 * left unlocked while we manipulate the related vnode to avoid 766 * a deadlock. 767 */ 768 ip = hammer_get_inode(&trans, NULL, ino, 769 hmp->asof, HAMMER_DEF_LOCALIZATION, 770 0, &error); 771 if (ip == NULL) { 772 *vpp = NULL; 773 hammer_done_transaction(&trans); 774 return(error); 775 } 776 error = hammer_get_vnode(ip, vpp); 777 hammer_rel_inode(ip, 0); 778 hammer_done_transaction(&trans); 779 return (error); 780 } 781 782 /* 783 * Return the root vnode for the filesystem. 784 * 785 * HAMMER stores the root vnode in the hammer_mount structure so 786 * getting it is easy. 787 */ 788 static int 789 hammer_vfs_root(struct mount *mp, struct vnode **vpp) 790 { 791 #if 0 792 struct hammer_mount *hmp = (void *)mp->mnt_data; 793 #endif 794 int error; 795 796 error = hammer_vfs_vget(mp, 1, vpp); 797 return (error); 798 } 799 800 static int 801 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 802 { 803 struct hammer_mount *hmp = (void *)mp->mnt_data; 804 hammer_volume_t volume; 805 hammer_volume_ondisk_t ondisk; 806 int error; 807 int64_t bfree; 808 809 volume = hammer_get_root_volume(hmp, &error); 810 if (error) 811 return(error); 812 ondisk = volume->ondisk; 813 814 /* 815 * Basic stats 816 */ 817 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes; 818 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 819 hammer_rel_volume(volume, 0); 820 821 mp->mnt_stat.f_bfree = bfree / HAMMER_BUFSIZE; 822 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree; 823 if (mp->mnt_stat.f_files < 0) 824 mp->mnt_stat.f_files = 0; 825 826 *sbp = mp->mnt_stat; 827 return(0); 828 } 829 830 static int 831 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 832 { 833 struct hammer_mount *hmp = (void *)mp->mnt_data; 834 hammer_volume_t volume; 835 hammer_volume_ondisk_t ondisk; 836 int error; 837 int64_t bfree; 838 839 volume = hammer_get_root_volume(hmp, &error); 840 if (error) 841 return(error); 842 ondisk = volume->ondisk; 843 844 /* 845 * Basic stats 846 */ 847 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes; 848 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 849 hammer_rel_volume(volume, 0); 850 851 mp->mnt_vstat.f_bfree = bfree / HAMMER_BUFSIZE; 852 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree; 853 if (mp->mnt_vstat.f_files < 0) 854 mp->mnt_vstat.f_files = 0; 855 *sbp = mp->mnt_vstat; 856 return(0); 857 } 858 859 /* 860 * Sync the filesystem. Currently we have to run it twice, the second 861 * one will advance the undo start index to the end index, so if a crash 862 * occurs no undos will be run on mount. 863 * 864 * We do not sync the filesystem if we are called from a panic. If we did 865 * we might end up blowing up a sync that was already in progress. 866 */ 867 static int 868 hammer_vfs_sync(struct mount *mp, int waitfor) 869 { 870 struct hammer_mount *hmp = (void *)mp->mnt_data; 871 int error; 872 873 if (panicstr == NULL) { 874 error = hammer_sync_hmp(hmp, waitfor); 875 if (error == 0) 876 error = hammer_sync_hmp(hmp, waitfor); 877 } else { 878 error = EIO; 879 } 880 return (error); 881 } 882 883 /* 884 * Convert a vnode to a file handle. 885 */ 886 static int 887 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp) 888 { 889 hammer_inode_t ip; 890 891 KKASSERT(MAXFIDSZ >= 16); 892 ip = VTOI(vp); 893 fhp->fid_len = offsetof(struct fid, fid_data[16]); 894 fhp->fid_ext = ip->obj_localization >> 16; 895 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id)); 896 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof)); 897 return(0); 898 } 899 900 901 /* 902 * Convert a file handle back to a vnode. 903 */ 904 static int 905 hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 906 { 907 struct hammer_transaction trans; 908 struct hammer_inode *ip; 909 struct hammer_inode_info info; 910 int error; 911 u_int32_t localization; 912 913 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id)); 914 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof)); 915 localization = (u_int32_t)fhp->fid_ext << 16; 916 917 hammer_simple_transaction(&trans, (void *)mp->mnt_data); 918 919 /* 920 * Get/allocate the hammer_inode structure. The structure must be 921 * unlocked while we manipulate the related vnode to avoid a 922 * deadlock. 923 */ 924 ip = hammer_get_inode(&trans, NULL, info.obj_id, 925 info.obj_asof, localization, 0, &error); 926 if (ip == NULL) { 927 *vpp = NULL; 928 return(error); 929 } 930 error = hammer_get_vnode(ip, vpp); 931 hammer_rel_inode(ip, 0); 932 hammer_done_transaction(&trans); 933 return (error); 934 } 935 936 static int 937 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 938 int *exflagsp, struct ucred **credanonp) 939 { 940 hammer_mount_t hmp = (void *)mp->mnt_data; 941 struct netcred *np; 942 int error; 943 944 np = vfs_export_lookup(mp, &hmp->export, nam); 945 if (np) { 946 *exflagsp = np->netc_exflags; 947 *credanonp = &np->netc_anon; 948 error = 0; 949 } else { 950 error = EACCES; 951 } 952 return (error); 953 954 } 955 956 int 957 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export) 958 { 959 hammer_mount_t hmp = (void *)mp->mnt_data; 960 int error; 961 962 switch(op) { 963 case MOUNTCTL_SET_EXPORT: 964 error = vfs_export(mp, &hmp->export, export); 965 break; 966 default: 967 error = EOPNOTSUPP; 968 break; 969 } 970 return(error); 971 } 972 973