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 1.50 2008/06/20 05:38:26 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; 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_debug_cluster_enable = 1; /* enable read clustering by default */ 60 int hammer_count_inodes; 61 int hammer_count_iqueued; 62 int hammer_count_reclaiming; 63 int hammer_count_records; 64 int hammer_count_record_datas; 65 int hammer_count_volumes; 66 int hammer_count_buffers; 67 int hammer_count_nodes; 68 int64_t hammer_stats_btree_lookups; 69 int64_t hammer_stats_btree_searches; 70 int64_t hammer_stats_btree_inserts; 71 int64_t hammer_stats_btree_deletes; 72 int64_t hammer_stats_btree_elements; 73 int64_t hammer_stats_btree_splits; 74 int64_t hammer_stats_btree_iterations; 75 int64_t hammer_stats_record_iterations; 76 int hammer_count_dirtybufs; /* global */ 77 int hammer_count_refedbufs; /* global */ 78 int hammer_count_reservations; 79 int hammer_count_io_running_read; 80 int hammer_count_io_running_write; 81 int hammer_count_io_locked; 82 int hammer_limit_dirtybufs; /* per-mount */ 83 int hammer_limit_recs; /* as a whole XXX */ 84 int hammer_limit_iqueued; /* per-mount */ 85 int hammer_bio_count; 86 int hammer_verify_zone; 87 int hammer_write_mode; 88 int64_t hammer_contention_count; 89 int64_t hammer_zone_limit; 90 91 SYSCTL_NODE(_vfs, OID_AUTO, hammer, CTLFLAG_RW, 0, "HAMMER filesystem"); 92 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_general, CTLFLAG_RW, 93 &hammer_debug_general, 0, ""); 94 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_io, CTLFLAG_RW, 95 &hammer_debug_io, 0, ""); 96 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_debug, CTLFLAG_RW, 97 &hammer_debug_debug, 0, ""); 98 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_inode, CTLFLAG_RW, 99 &hammer_debug_inode, 0, ""); 100 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_locks, CTLFLAG_RW, 101 &hammer_debug_locks, 0, ""); 102 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_btree, CTLFLAG_RW, 103 &hammer_debug_btree, 0, ""); 104 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_tid, CTLFLAG_RW, 105 &hammer_debug_tid, 0, ""); 106 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover, CTLFLAG_RW, 107 &hammer_debug_recover, 0, ""); 108 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover_faults, CTLFLAG_RW, 109 &hammer_debug_recover_faults, 0, ""); 110 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_cluster_enable, CTLFLAG_RW, 111 &hammer_debug_cluster_enable, 0, ""); 112 113 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_dirtybufs, CTLFLAG_RW, 114 &hammer_limit_dirtybufs, 0, ""); 115 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_recs, CTLFLAG_RW, 116 &hammer_limit_recs, 0, ""); 117 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_iqueued, CTLFLAG_RW, 118 &hammer_limit_iqueued, 0, ""); 119 120 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD, 121 &hammer_count_inodes, 0, ""); 122 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD, 123 &hammer_count_iqueued, 0, ""); 124 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaiming, CTLFLAG_RD, 125 &hammer_count_reclaiming, 0, ""); 126 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD, 127 &hammer_count_records, 0, ""); 128 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD, 129 &hammer_count_record_datas, 0, ""); 130 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD, 131 &hammer_count_volumes, 0, ""); 132 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD, 133 &hammer_count_buffers, 0, ""); 134 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD, 135 &hammer_count_nodes, 0, ""); 136 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD, 137 &hammer_stats_btree_searches, 0, ""); 138 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD, 139 &hammer_stats_btree_lookups, 0, ""); 140 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD, 141 &hammer_stats_btree_inserts, 0, ""); 142 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD, 143 &hammer_stats_btree_deletes, 0, ""); 144 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD, 145 &hammer_stats_btree_elements, 0, ""); 146 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD, 147 &hammer_stats_btree_splits, 0, ""); 148 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD, 149 &hammer_stats_btree_iterations, 0, ""); 150 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD, 151 &hammer_stats_record_iterations, 0, ""); 152 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_dirtybufs, CTLFLAG_RD, 153 &hammer_count_dirtybufs, 0, ""); 154 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD, 155 &hammer_count_refedbufs, 0, ""); 156 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD, 157 &hammer_count_reservations, 0, ""); 158 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD, 159 &hammer_count_io_running_read, 0, ""); 160 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD, 161 &hammer_count_io_locked, 0, ""); 162 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD, 163 &hammer_count_io_running_write, 0, ""); 164 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW, 165 &hammer_zone_limit, 0, ""); 166 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW, 167 &hammer_contention_count, 0, ""); 168 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_zone, CTLFLAG_RW, 169 &hammer_verify_zone, 0, ""); 170 SYSCTL_INT(_vfs_hammer, OID_AUTO, write_mode, CTLFLAG_RW, 171 &hammer_write_mode, 0, ""); 172 173 KTR_INFO_MASTER(hammer); 174 175 /* 176 * VFS ABI 177 */ 178 static void hammer_free_hmp(struct mount *mp); 179 180 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data, 181 struct ucred *cred); 182 static int hammer_vfs_unmount(struct mount *mp, int mntflags); 183 static int hammer_vfs_root(struct mount *mp, struct vnode **vpp); 184 static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, 185 struct ucred *cred); 186 static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, 187 struct ucred *cred); 188 static int hammer_vfs_sync(struct mount *mp, int waitfor); 189 static int hammer_vfs_vget(struct mount *mp, ino_t ino, 190 struct vnode **vpp); 191 static int hammer_vfs_init(struct vfsconf *conf); 192 static int hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp, 193 struct vnode **vpp); 194 static int hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp); 195 static int hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 196 int *exflagsp, struct ucred **credanonp); 197 198 199 static struct vfsops hammer_vfsops = { 200 .vfs_mount = hammer_vfs_mount, 201 .vfs_unmount = hammer_vfs_unmount, 202 .vfs_root = hammer_vfs_root, 203 .vfs_statfs = hammer_vfs_statfs, 204 .vfs_statvfs = hammer_vfs_statvfs, 205 .vfs_sync = hammer_vfs_sync, 206 .vfs_vget = hammer_vfs_vget, 207 .vfs_init = hammer_vfs_init, 208 .vfs_vptofh = hammer_vfs_vptofh, 209 .vfs_fhtovp = hammer_vfs_fhtovp, 210 .vfs_checkexp = hammer_vfs_checkexp 211 }; 212 213 MALLOC_DEFINE(M_HAMMER, "hammer-mount", "hammer mount"); 214 215 VFS_SET(hammer_vfsops, hammer, 0); 216 MODULE_VERSION(hammer, 1); 217 218 static int 219 hammer_vfs_init(struct vfsconf *conf) 220 { 221 if (hammer_limit_recs == 0) /* XXX TODO */ 222 hammer_limit_recs = nbuf * 25; 223 if (hammer_limit_dirtybufs == 0) { 224 hammer_limit_dirtybufs = hidirtybuffers / 2; 225 if (hammer_limit_dirtybufs < 100) 226 hammer_limit_dirtybufs = 100; 227 } 228 if (hammer_limit_iqueued == 0) 229 hammer_limit_iqueued = desiredvnodes / 5; 230 return(0); 231 } 232 233 static int 234 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data, 235 struct ucred *cred) 236 { 237 struct hammer_mount_info info; 238 hammer_mount_t hmp; 239 hammer_volume_t rootvol; 240 struct vnode *rootvp; 241 const char *upath; /* volume name in userspace */ 242 char *path; /* volume name in system space */ 243 int error; 244 int i; 245 246 if ((error = copyin(data, &info, sizeof(info))) != 0) 247 return (error); 248 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 249 if (info.nvolumes <= 0 || info.nvolumes >= 32768) 250 return (EINVAL); 251 } 252 253 /* 254 * Interal mount data structure 255 */ 256 if (mp->mnt_flag & MNT_UPDATE) { 257 hmp = (void *)mp->mnt_data; 258 KKASSERT(hmp != NULL); 259 } else { 260 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO); 261 mp->mnt_data = (qaddr_t)hmp; 262 hmp->mp = mp; 263 hmp->namekey_iterator = mycpu->gd_time_seconds; 264 /*TAILQ_INIT(&hmp->recycle_list);*/ 265 266 hmp->root_btree_beg.localization = HAMMER_MIN_LOCALIZATION; 267 hmp->root_btree_beg.obj_id = -0x8000000000000000LL; 268 hmp->root_btree_beg.key = -0x8000000000000000LL; 269 hmp->root_btree_beg.create_tid = 1; 270 hmp->root_btree_beg.delete_tid = 1; 271 hmp->root_btree_beg.rec_type = 0; 272 hmp->root_btree_beg.obj_type = 0; 273 274 hmp->root_btree_end.localization = HAMMER_MAX_LOCALIZATION; 275 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL; 276 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL; 277 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL; 278 hmp->root_btree_end.delete_tid = 0; /* special case */ 279 hmp->root_btree_end.rec_type = 0xFFFFU; 280 hmp->root_btree_end.obj_type = 0; 281 282 hmp->sync_lock.refs = 1; 283 hmp->free_lock.refs = 1; 284 hmp->undo_lock.refs = 1; 285 hmp->blkmap_lock.refs = 1; 286 287 TAILQ_INIT(&hmp->flush_list); 288 TAILQ_INIT(&hmp->delay_list); 289 TAILQ_INIT(&hmp->objid_cache_list); 290 TAILQ_INIT(&hmp->undo_lru_list); 291 TAILQ_INIT(&hmp->reclaim_list); 292 } 293 hmp->hflags &= ~HMNT_USERFLAGS; 294 hmp->hflags |= info.hflags & HMNT_USERFLAGS; 295 if (info.asof) { 296 kprintf("ASOF\n"); 297 mp->mnt_flag |= MNT_RDONLY; 298 hmp->asof = info.asof; 299 } else { 300 hmp->asof = HAMMER_MAX_TID; 301 } 302 303 /* 304 * Re-open read-write if originally read-only, or vise-versa. 305 */ 306 if (mp->mnt_flag & MNT_UPDATE) { 307 error = 0; 308 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 309 kprintf("HAMMER read-only -> read-write\n"); 310 hmp->ronly = 0; 311 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 312 hammer_adjust_volume_mode, NULL); 313 rootvol = hammer_get_root_volume(hmp, &error); 314 if (rootvol) { 315 hammer_recover_flush_buffers(hmp, rootvol); 316 bcopy(rootvol->ondisk->vol0_blockmap, 317 hmp->blockmap, 318 sizeof(hmp->blockmap)); 319 hammer_rel_volume(rootvol, 0); 320 } 321 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 322 hammer_reload_inode, NULL); 323 /* kernel clears MNT_RDONLY */ 324 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 325 kprintf("HAMMER read-write -> read-only\n"); 326 hmp->ronly = 1; /* messy */ 327 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 328 hammer_reload_inode, NULL); 329 hmp->ronly = 0; 330 hammer_flusher_sync(hmp); 331 hammer_flusher_sync(hmp); 332 hammer_flusher_sync(hmp); 333 hmp->ronly = 1; 334 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 335 hammer_adjust_volume_mode, NULL); 336 } 337 return(error); 338 } 339 340 RB_INIT(&hmp->rb_vols_root); 341 RB_INIT(&hmp->rb_inos_root); 342 RB_INIT(&hmp->rb_nods_root); 343 RB_INIT(&hmp->rb_undo_root); 344 RB_INIT(&hmp->rb_resv_root); 345 RB_INIT(&hmp->rb_bufs_root); 346 347 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 348 349 TAILQ_INIT(&hmp->volu_list); 350 TAILQ_INIT(&hmp->undo_list); 351 TAILQ_INIT(&hmp->data_list); 352 TAILQ_INIT(&hmp->meta_list); 353 TAILQ_INIT(&hmp->lose_list); 354 355 /* 356 * Load volumes 357 */ 358 path = objcache_get(namei_oc, M_WAITOK); 359 hmp->nvolumes = info.nvolumes; 360 for (i = 0; i < info.nvolumes; ++i) { 361 error = copyin(&info.volumes[i], &upath, sizeof(char *)); 362 if (error == 0) 363 error = copyinstr(upath, path, MAXPATHLEN, NULL); 364 if (error == 0) 365 error = hammer_install_volume(hmp, path); 366 if (error) 367 break; 368 } 369 objcache_put(namei_oc, path); 370 371 /* 372 * Make sure we found a root volume 373 */ 374 if (error == 0 && hmp->rootvol == NULL) { 375 kprintf("hammer_mount: No root volume found!\n"); 376 error = EINVAL; 377 } 378 if (error) { 379 hammer_free_hmp(mp); 380 return (error); 381 } 382 383 /* 384 * No errors, setup enough of the mount point so we can lookup the 385 * root vnode. 386 */ 387 mp->mnt_iosize_max = MAXPHYS; 388 mp->mnt_kern_flag |= MNTK_FSMID; 389 390 /* 391 * note: f_iosize is used by vnode_pager_haspage() when constructing 392 * its VOP_BMAP call. 393 */ 394 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE; 395 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE; 396 397 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE; 398 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE; 399 400 mp->mnt_maxsymlinklen = 255; 401 mp->mnt_flag |= MNT_LOCAL; 402 403 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops); 404 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops); 405 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops); 406 407 /* 408 * The root volume's ondisk pointer is only valid if we hold a 409 * reference to it. 410 */ 411 rootvol = hammer_get_root_volume(hmp, &error); 412 if (error) 413 goto failed; 414 415 /* 416 * Perform any necessary UNDO operations. The recovery code does 417 * call hammer_undo_lookup() so we have to pre-cache the blockmap, 418 * and then re-copy it again after recovery is complete. 419 * 420 * If this is a read-only mount the UNDO information is retained 421 * in memory in the form of dirty buffer cache buffers, and not 422 * written back to the media. 423 */ 424 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 425 sizeof(hmp->blockmap)); 426 427 error = hammer_recover(hmp, rootvol); 428 if (error) { 429 kprintf("Failed to recover HAMMER filesystem on mount\n"); 430 goto done; 431 } 432 433 /* 434 * Finish setup now that we have a good root volume 435 */ 436 ksnprintf(mp->mnt_stat.f_mntfromname, 437 sizeof(mp->mnt_stat.f_mntfromname), "%s", 438 rootvol->ondisk->vol_name); 439 mp->mnt_stat.f_fsid.val[0] = 440 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8); 441 mp->mnt_stat.f_fsid.val[1] = 442 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8); 443 444 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid; 445 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid, 446 sizeof(mp->mnt_vstat.f_fsid_uuid)); 447 448 /* 449 * Certain often-modified fields in the root volume are cached in 450 * the hammer_mount structure so we do not have to generate lots 451 * of little UNDO structures for them. 452 * 453 * Recopy after recovery. This also has the side effect of 454 * setting our cached undo FIFO's first_offset, which serves to 455 * placemark the FIFO start for the NEXT flush cycle while the 456 * on-disk first_offset represents the LAST flush cycle. 457 */ 458 hmp->next_tid = rootvol->ondisk->vol0_next_tid; 459 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 460 sizeof(hmp->blockmap)); 461 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks; 462 463 hammer_flusher_create(hmp); 464 465 /* 466 * Locate the root directory using the root cluster's B-Tree as a 467 * starting point. The root directory uses an obj_id of 1. 468 * 469 * FUTURE: Leave the root directory cached referenced but unlocked 470 * in hmp->rootvp (need to flush it on unmount). 471 */ 472 error = hammer_vfs_vget(mp, 1, &rootvp); 473 if (error) 474 goto done; 475 vput(rootvp); 476 /*vn_unlock(hmp->rootvp);*/ 477 478 done: 479 hammer_rel_volume(rootvol, 0); 480 failed: 481 /* 482 * Cleanup and return. 483 */ 484 if (error) 485 hammer_free_hmp(mp); 486 return (error); 487 } 488 489 static int 490 hammer_vfs_unmount(struct mount *mp, int mntflags) 491 { 492 #if 0 493 struct hammer_mount *hmp = (void *)mp->mnt_data; 494 #endif 495 int flags; 496 int error; 497 498 /* 499 * Clean out the vnodes 500 */ 501 flags = 0; 502 if (mntflags & MNT_FORCE) 503 flags |= FORCECLOSE; 504 if ((error = vflush(mp, 0, flags)) != 0) 505 return (error); 506 507 /* 508 * Clean up the internal mount structure and related entities. This 509 * may issue I/O. 510 */ 511 hammer_free_hmp(mp); 512 return(0); 513 } 514 515 /* 516 * Clean up the internal mount structure and disassociate it from the mount. 517 * This may issue I/O. 518 */ 519 static void 520 hammer_free_hmp(struct mount *mp) 521 { 522 struct hammer_mount *hmp = (void *)mp->mnt_data; 523 524 #if 0 525 /* 526 * Clean up the root vnode 527 */ 528 if (hmp->rootvp) { 529 vrele(hmp->rootvp); 530 hmp->rootvp = NULL; 531 } 532 #endif 533 hammer_flusher_sync(hmp); 534 hammer_flusher_sync(hmp); 535 hammer_flusher_destroy(hmp); 536 537 KKASSERT(RB_EMPTY(&hmp->rb_inos_root)); 538 539 #if 0 540 /* 541 * Unload & flush inodes 542 * 543 * XXX illegal to call this from here, it can only be done from 544 * the flusher. 545 */ 546 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 547 hammer_unload_inode, (void *)MNT_WAIT); 548 549 /* 550 * Unload & flush volumes 551 */ 552 #endif 553 /* 554 * Unload buffers and then volumes 555 */ 556 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL, 557 hammer_unload_buffer, NULL); 558 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 559 hammer_unload_volume, NULL); 560 561 mp->mnt_data = NULL; 562 mp->mnt_flag &= ~MNT_LOCAL; 563 hmp->mp = NULL; 564 hammer_destroy_objid_cache(hmp); 565 kfree(hmp, M_HAMMER); 566 } 567 568 /* 569 * Obtain a vnode for the specified inode number. An exclusively locked 570 * vnode is returned. 571 */ 572 int 573 hammer_vfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 574 { 575 struct hammer_transaction trans; 576 struct hammer_mount *hmp = (void *)mp->mnt_data; 577 struct hammer_inode *ip; 578 int error; 579 580 hammer_simple_transaction(&trans, hmp); 581 582 /* 583 * Lookup the requested HAMMER inode. The structure must be 584 * left unlocked while we manipulate the related vnode to avoid 585 * a deadlock. 586 */ 587 ip = hammer_get_inode(&trans, NULL, ino, hmp->asof, 0, &error); 588 if (ip == NULL) { 589 *vpp = NULL; 590 return(error); 591 } 592 error = hammer_get_vnode(ip, vpp); 593 hammer_rel_inode(ip, 0); 594 hammer_done_transaction(&trans); 595 return (error); 596 } 597 598 /* 599 * Return the root vnode for the filesystem. 600 * 601 * HAMMER stores the root vnode in the hammer_mount structure so 602 * getting it is easy. 603 */ 604 static int 605 hammer_vfs_root(struct mount *mp, struct vnode **vpp) 606 { 607 #if 0 608 struct hammer_mount *hmp = (void *)mp->mnt_data; 609 #endif 610 int error; 611 612 error = hammer_vfs_vget(mp, 1, vpp); 613 return (error); 614 } 615 616 static int 617 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 618 { 619 struct hammer_mount *hmp = (void *)mp->mnt_data; 620 hammer_volume_t volume; 621 hammer_volume_ondisk_t ondisk; 622 int error; 623 int64_t bfree; 624 625 volume = hammer_get_root_volume(hmp, &error); 626 if (error) 627 return(error); 628 ondisk = volume->ondisk; 629 630 /* 631 * Basic stats 632 */ 633 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes; 634 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 635 hammer_rel_volume(volume, 0); 636 637 mp->mnt_stat.f_bfree = bfree / HAMMER_BUFSIZE; 638 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree; 639 if (mp->mnt_stat.f_files < 0) 640 mp->mnt_stat.f_files = 0; 641 642 *sbp = mp->mnt_stat; 643 return(0); 644 } 645 646 static int 647 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 648 { 649 struct hammer_mount *hmp = (void *)mp->mnt_data; 650 hammer_volume_t volume; 651 hammer_volume_ondisk_t ondisk; 652 int error; 653 int64_t bfree; 654 655 volume = hammer_get_root_volume(hmp, &error); 656 if (error) 657 return(error); 658 ondisk = volume->ondisk; 659 660 /* 661 * Basic stats 662 */ 663 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes; 664 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 665 hammer_rel_volume(volume, 0); 666 667 mp->mnt_vstat.f_bfree = bfree / HAMMER_BUFSIZE; 668 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree; 669 if (mp->mnt_vstat.f_files < 0) 670 mp->mnt_vstat.f_files = 0; 671 *sbp = mp->mnt_vstat; 672 return(0); 673 } 674 675 /* 676 * Sync the filesystem. Currently we have to run it twice, the second 677 * one will advance the undo start index to the end index, so if a crash 678 * occurs no undos will be run on mount. 679 * 680 * We do not sync the filesystem if we are called from a panic. If we did 681 * we might end up blowing up a sync that was already in progress. 682 */ 683 static int 684 hammer_vfs_sync(struct mount *mp, int waitfor) 685 { 686 struct hammer_mount *hmp = (void *)mp->mnt_data; 687 int error; 688 689 if (panicstr == NULL) { 690 error = hammer_sync_hmp(hmp, waitfor); 691 if (error == 0) 692 error = hammer_sync_hmp(hmp, waitfor); 693 } else { 694 error = EIO; 695 } 696 return (error); 697 } 698 699 /* 700 * Convert a vnode to a file handle. 701 */ 702 static int 703 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp) 704 { 705 hammer_inode_t ip; 706 707 KKASSERT(MAXFIDSZ >= 16); 708 ip = VTOI(vp); 709 fhp->fid_len = offsetof(struct fid, fid_data[16]); 710 fhp->fid_reserved = 0; 711 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id)); 712 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof)); 713 return(0); 714 } 715 716 717 /* 718 * Convert a file handle back to a vnode. 719 */ 720 static int 721 hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 722 { 723 struct hammer_transaction trans; 724 struct hammer_inode *ip; 725 struct hammer_inode_info info; 726 int error; 727 728 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id)); 729 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof)); 730 731 hammer_simple_transaction(&trans, (void *)mp->mnt_data); 732 733 /* 734 * Get/allocate the hammer_inode structure. The structure must be 735 * unlocked while we manipulate the related vnode to avoid a 736 * deadlock. 737 */ 738 ip = hammer_get_inode(&trans, NULL, info.obj_id, info.obj_asof, 739 0, &error); 740 if (ip == NULL) { 741 *vpp = NULL; 742 return(error); 743 } 744 error = hammer_get_vnode(ip, vpp); 745 hammer_rel_inode(ip, 0); 746 hammer_done_transaction(&trans); 747 return (error); 748 } 749 750 static int 751 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 752 int *exflagsp, struct ucred **credanonp) 753 { 754 hammer_mount_t hmp = (void *)mp->mnt_data; 755 struct netcred *np; 756 int error; 757 758 np = vfs_export_lookup(mp, &hmp->export, nam); 759 if (np) { 760 *exflagsp = np->netc_exflags; 761 *credanonp = &np->netc_anon; 762 error = 0; 763 } else { 764 error = EACCES; 765 } 766 return (error); 767 768 } 769 770 int 771 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export) 772 { 773 hammer_mount_t hmp = (void *)mp->mnt_data; 774 int error; 775 776 switch(op) { 777 case MOUNTCTL_SET_EXPORT: 778 error = vfs_export(mp, &hmp->export, export); 779 break; 780 default: 781 error = EOPNOTSUPP; 782 break; 783 } 784 return(error); 785 } 786 787