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 1.56 2008/06/28 23:50:37 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_dirtybufspace; /* 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_dirtybufspace; /* 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_dirtybufspace, CTLFLAG_RW, 114 &hammer_limit_dirtybufspace, 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_dirtybufspace, CTLFLAG_RD, 153 &hammer_count_dirtybufspace, 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_dirtybufspace == 0) { 224 hammer_limit_dirtybufspace = hidirtybufspace / 2; 225 if (hammer_limit_dirtybufspace < 100) 226 hammer_limit_dirtybufspace = 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 if ((info.hflags & HMNT_MASTERID) && 253 (info.masterid < -1 || info.masterid >= HAMMER_MAX_MASTERS)) { 254 return (EINVAL); 255 } 256 257 /* 258 * Interal mount data structure 259 */ 260 if (mp->mnt_flag & MNT_UPDATE) { 261 hmp = (void *)mp->mnt_data; 262 KKASSERT(hmp != NULL); 263 } else { 264 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO); 265 mp->mnt_data = (qaddr_t)hmp; 266 hmp->mp = mp; 267 hmp->namekey_iterator = mycpu->gd_time_seconds; 268 /*TAILQ_INIT(&hmp->recycle_list);*/ 269 270 hmp->root_btree_beg.localization = 0x00000000U; 271 hmp->root_btree_beg.obj_id = -0x8000000000000000LL; 272 hmp->root_btree_beg.key = -0x8000000000000000LL; 273 hmp->root_btree_beg.create_tid = 1; 274 hmp->root_btree_beg.delete_tid = 1; 275 hmp->root_btree_beg.rec_type = 0; 276 hmp->root_btree_beg.obj_type = 0; 277 278 hmp->root_btree_end.localization = 0xFFFFFFFFU; 279 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL; 280 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL; 281 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL; 282 hmp->root_btree_end.delete_tid = 0; /* special case */ 283 hmp->root_btree_end.rec_type = 0xFFFFU; 284 hmp->root_btree_end.obj_type = 0; 285 286 hmp->sync_lock.refs = 1; 287 hmp->free_lock.refs = 1; 288 hmp->undo_lock.refs = 1; 289 hmp->blkmap_lock.refs = 1; 290 291 TAILQ_INIT(&hmp->flush_list); 292 TAILQ_INIT(&hmp->delay_list); 293 TAILQ_INIT(&hmp->objid_cache_list); 294 TAILQ_INIT(&hmp->undo_lru_list); 295 TAILQ_INIT(&hmp->reclaim_list); 296 } 297 hmp->hflags &= ~HMNT_USERFLAGS; 298 hmp->hflags |= info.hflags & HMNT_USERFLAGS; 299 if (info.hflags & HMNT_MASTERID) 300 hmp->masterid = info.masterid; 301 else 302 hmp->masterid = -1; 303 if (info.asof) { 304 kprintf("ASOF\n"); 305 mp->mnt_flag |= MNT_RDONLY; 306 hmp->asof = info.asof; 307 } else { 308 hmp->asof = HAMMER_MAX_TID; 309 } 310 311 /* 312 * Re-open read-write if originally read-only, or vise-versa. 313 */ 314 if (mp->mnt_flag & MNT_UPDATE) { 315 error = 0; 316 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 317 kprintf("HAMMER read-only -> read-write\n"); 318 hmp->ronly = 0; 319 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 320 hammer_adjust_volume_mode, NULL); 321 rootvol = hammer_get_root_volume(hmp, &error); 322 if (rootvol) { 323 hammer_recover_flush_buffers(hmp, rootvol, 1); 324 bcopy(rootvol->ondisk->vol0_blockmap, 325 hmp->blockmap, 326 sizeof(hmp->blockmap)); 327 hammer_rel_volume(rootvol, 0); 328 } 329 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 330 hammer_reload_inode, NULL); 331 /* kernel clears MNT_RDONLY */ 332 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 333 kprintf("HAMMER read-write -> read-only\n"); 334 hmp->ronly = 1; /* messy */ 335 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 336 hammer_reload_inode, NULL); 337 hmp->ronly = 0; 338 hammer_flusher_sync(hmp); 339 hammer_flusher_sync(hmp); 340 hammer_flusher_sync(hmp); 341 hmp->ronly = 1; 342 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 343 hammer_adjust_volume_mode, NULL); 344 } 345 return(error); 346 } 347 348 RB_INIT(&hmp->rb_vols_root); 349 RB_INIT(&hmp->rb_inos_root); 350 RB_INIT(&hmp->rb_nods_root); 351 RB_INIT(&hmp->rb_undo_root); 352 RB_INIT(&hmp->rb_resv_root); 353 RB_INIT(&hmp->rb_bufs_root); 354 355 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 356 357 TAILQ_INIT(&hmp->volu_list); 358 TAILQ_INIT(&hmp->undo_list); 359 TAILQ_INIT(&hmp->data_list); 360 TAILQ_INIT(&hmp->meta_list); 361 TAILQ_INIT(&hmp->lose_list); 362 363 /* 364 * Load volumes 365 */ 366 path = objcache_get(namei_oc, M_WAITOK); 367 hmp->nvolumes = info.nvolumes; 368 for (i = 0; i < info.nvolumes; ++i) { 369 error = copyin(&info.volumes[i], &upath, sizeof(char *)); 370 if (error == 0) 371 error = copyinstr(upath, path, MAXPATHLEN, NULL); 372 if (error == 0) 373 error = hammer_install_volume(hmp, path); 374 if (error) 375 break; 376 } 377 objcache_put(namei_oc, path); 378 379 /* 380 * Make sure we found a root volume 381 */ 382 if (error == 0 && hmp->rootvol == NULL) { 383 kprintf("hammer_mount: No root volume found!\n"); 384 error = EINVAL; 385 } 386 if (error) { 387 hammer_free_hmp(mp); 388 return (error); 389 } 390 391 /* 392 * No errors, setup enough of the mount point so we can lookup the 393 * root vnode. 394 */ 395 mp->mnt_iosize_max = MAXPHYS; 396 mp->mnt_kern_flag |= MNTK_FSMID; 397 398 /* 399 * note: f_iosize is used by vnode_pager_haspage() when constructing 400 * its VOP_BMAP call. 401 */ 402 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE; 403 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE; 404 405 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE; 406 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE; 407 408 mp->mnt_maxsymlinklen = 255; 409 mp->mnt_flag |= MNT_LOCAL; 410 411 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops); 412 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops); 413 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops); 414 415 /* 416 * The root volume's ondisk pointer is only valid if we hold a 417 * reference to it. 418 */ 419 rootvol = hammer_get_root_volume(hmp, &error); 420 if (error) 421 goto failed; 422 423 /* 424 * Perform any necessary UNDO operations. The recovery code does 425 * call hammer_undo_lookup() so we have to pre-cache the blockmap, 426 * and then re-copy it again after recovery is complete. 427 * 428 * If this is a read-only mount the UNDO information is retained 429 * in memory in the form of dirty buffer cache buffers, and not 430 * written back to the media. 431 */ 432 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 433 sizeof(hmp->blockmap)); 434 435 error = hammer_recover(hmp, rootvol); 436 if (error) { 437 kprintf("Failed to recover HAMMER filesystem on mount\n"); 438 goto done; 439 } 440 441 /* 442 * Finish setup now that we have a good root volume 443 */ 444 ksnprintf(mp->mnt_stat.f_mntfromname, 445 sizeof(mp->mnt_stat.f_mntfromname), "%s", 446 rootvol->ondisk->vol_name); 447 mp->mnt_stat.f_fsid.val[0] = 448 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8); 449 mp->mnt_stat.f_fsid.val[1] = 450 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8); 451 452 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid; 453 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid, 454 sizeof(mp->mnt_vstat.f_fsid_uuid)); 455 456 /* 457 * Certain often-modified fields in the root volume are cached in 458 * the hammer_mount structure so we do not have to generate lots 459 * of little UNDO structures for them. 460 * 461 * Recopy after recovery. This also has the side effect of 462 * setting our cached undo FIFO's first_offset, which serves to 463 * placemark the FIFO start for the NEXT flush cycle while the 464 * on-disk first_offset represents the LAST flush cycle. 465 */ 466 hmp->next_tid = rootvol->ondisk->vol0_next_tid; 467 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, 468 sizeof(hmp->blockmap)); 469 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks; 470 471 hammer_flusher_create(hmp); 472 473 /* 474 * Locate the root directory using the root cluster's B-Tree as a 475 * starting point. The root directory uses an obj_id of 1. 476 * 477 * FUTURE: Leave the root directory cached referenced but unlocked 478 * in hmp->rootvp (need to flush it on unmount). 479 */ 480 error = hammer_vfs_vget(mp, 1, &rootvp); 481 if (error) 482 goto done; 483 vput(rootvp); 484 /*vn_unlock(hmp->rootvp);*/ 485 486 done: 487 hammer_rel_volume(rootvol, 0); 488 failed: 489 /* 490 * Cleanup and return. 491 */ 492 if (error) 493 hammer_free_hmp(mp); 494 return (error); 495 } 496 497 static int 498 hammer_vfs_unmount(struct mount *mp, int mntflags) 499 { 500 #if 0 501 struct hammer_mount *hmp = (void *)mp->mnt_data; 502 #endif 503 int flags; 504 int error; 505 506 /* 507 * Clean out the vnodes 508 */ 509 flags = 0; 510 if (mntflags & MNT_FORCE) 511 flags |= FORCECLOSE; 512 if ((error = vflush(mp, 0, flags)) != 0) 513 return (error); 514 515 /* 516 * Clean up the internal mount structure and related entities. This 517 * may issue I/O. 518 */ 519 hammer_free_hmp(mp); 520 return(0); 521 } 522 523 /* 524 * Clean up the internal mount structure and disassociate it from the mount. 525 * This may issue I/O. 526 */ 527 static void 528 hammer_free_hmp(struct mount *mp) 529 { 530 struct hammer_mount *hmp = (void *)mp->mnt_data; 531 532 #if 0 533 /* 534 * Clean up the root vnode 535 */ 536 if (hmp->rootvp) { 537 vrele(hmp->rootvp); 538 hmp->rootvp = NULL; 539 } 540 #endif 541 hammer_flusher_sync(hmp); 542 hammer_flusher_sync(hmp); 543 hammer_flusher_destroy(hmp); 544 545 KKASSERT(RB_EMPTY(&hmp->rb_inos_root)); 546 547 #if 0 548 /* 549 * Unload & flush inodes 550 * 551 * XXX illegal to call this from here, it can only be done from 552 * the flusher. 553 */ 554 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, 555 hammer_unload_inode, (void *)MNT_WAIT); 556 557 /* 558 * Unload & flush volumes 559 */ 560 #endif 561 /* 562 * Unload buffers and then volumes 563 */ 564 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL, 565 hammer_unload_buffer, NULL); 566 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, 567 hammer_unload_volume, NULL); 568 569 mp->mnt_data = NULL; 570 mp->mnt_flag &= ~MNT_LOCAL; 571 hmp->mp = NULL; 572 hammer_destroy_objid_cache(hmp); 573 kfree(hmp, M_HAMMER); 574 } 575 576 /* 577 * Obtain a vnode for the specified inode number. An exclusively locked 578 * vnode is returned. 579 */ 580 int 581 hammer_vfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 582 { 583 struct hammer_transaction trans; 584 struct hammer_mount *hmp = (void *)mp->mnt_data; 585 struct hammer_inode *ip; 586 int error; 587 588 hammer_simple_transaction(&trans, hmp); 589 590 /* 591 * Lookup the requested HAMMER inode. The structure must be 592 * left unlocked while we manipulate the related vnode to avoid 593 * a deadlock. 594 */ 595 ip = hammer_get_inode(&trans, NULL, ino, 596 hmp->asof, HAMMER_DEF_LOCALIZATION, 597 0, &error); 598 if (ip == NULL) { 599 *vpp = NULL; 600 return(error); 601 } 602 error = hammer_get_vnode(ip, vpp); 603 hammer_rel_inode(ip, 0); 604 hammer_done_transaction(&trans); 605 return (error); 606 } 607 608 /* 609 * Return the root vnode for the filesystem. 610 * 611 * HAMMER stores the root vnode in the hammer_mount structure so 612 * getting it is easy. 613 */ 614 static int 615 hammer_vfs_root(struct mount *mp, struct vnode **vpp) 616 { 617 #if 0 618 struct hammer_mount *hmp = (void *)mp->mnt_data; 619 #endif 620 int error; 621 622 error = hammer_vfs_vget(mp, 1, vpp); 623 return (error); 624 } 625 626 static int 627 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 628 { 629 struct hammer_mount *hmp = (void *)mp->mnt_data; 630 hammer_volume_t volume; 631 hammer_volume_ondisk_t ondisk; 632 int error; 633 int64_t bfree; 634 635 volume = hammer_get_root_volume(hmp, &error); 636 if (error) 637 return(error); 638 ondisk = volume->ondisk; 639 640 /* 641 * Basic stats 642 */ 643 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes; 644 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 645 hammer_rel_volume(volume, 0); 646 647 mp->mnt_stat.f_bfree = bfree / HAMMER_BUFSIZE; 648 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree; 649 if (mp->mnt_stat.f_files < 0) 650 mp->mnt_stat.f_files = 0; 651 652 *sbp = mp->mnt_stat; 653 return(0); 654 } 655 656 static int 657 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 658 { 659 struct hammer_mount *hmp = (void *)mp->mnt_data; 660 hammer_volume_t volume; 661 hammer_volume_ondisk_t ondisk; 662 int error; 663 int64_t bfree; 664 665 volume = hammer_get_root_volume(hmp, &error); 666 if (error) 667 return(error); 668 ondisk = volume->ondisk; 669 670 /* 671 * Basic stats 672 */ 673 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes; 674 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE; 675 hammer_rel_volume(volume, 0); 676 677 mp->mnt_vstat.f_bfree = bfree / HAMMER_BUFSIZE; 678 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree; 679 if (mp->mnt_vstat.f_files < 0) 680 mp->mnt_vstat.f_files = 0; 681 *sbp = mp->mnt_vstat; 682 return(0); 683 } 684 685 /* 686 * Sync the filesystem. Currently we have to run it twice, the second 687 * one will advance the undo start index to the end index, so if a crash 688 * occurs no undos will be run on mount. 689 * 690 * We do not sync the filesystem if we are called from a panic. If we did 691 * we might end up blowing up a sync that was already in progress. 692 */ 693 static int 694 hammer_vfs_sync(struct mount *mp, int waitfor) 695 { 696 struct hammer_mount *hmp = (void *)mp->mnt_data; 697 int error; 698 699 if (panicstr == NULL) { 700 error = hammer_sync_hmp(hmp, waitfor); 701 if (error == 0) 702 error = hammer_sync_hmp(hmp, waitfor); 703 } else { 704 error = EIO; 705 } 706 return (error); 707 } 708 709 /* 710 * Convert a vnode to a file handle. 711 */ 712 static int 713 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp) 714 { 715 hammer_inode_t ip; 716 717 KKASSERT(MAXFIDSZ >= 16); 718 ip = VTOI(vp); 719 fhp->fid_len = offsetof(struct fid, fid_data[16]); 720 fhp->fid_reserved = 0; 721 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id)); 722 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof)); 723 return(0); 724 } 725 726 727 /* 728 * Convert a file handle back to a vnode. 729 */ 730 static int 731 hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 732 { 733 struct hammer_transaction trans; 734 struct hammer_inode *ip; 735 struct hammer_inode_info info; 736 int error; 737 738 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id)); 739 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof)); 740 741 hammer_simple_transaction(&trans, (void *)mp->mnt_data); 742 743 /* 744 * Get/allocate the hammer_inode structure. The structure must be 745 * unlocked while we manipulate the related vnode to avoid a 746 * deadlock. 747 */ 748 ip = hammer_get_inode(&trans, NULL, info.obj_id, 749 info.obj_asof, HAMMER_DEF_LOCALIZATION, 750 0, &error); 751 if (ip == NULL) { 752 *vpp = NULL; 753 return(error); 754 } 755 error = hammer_get_vnode(ip, vpp); 756 hammer_rel_inode(ip, 0); 757 hammer_done_transaction(&trans); 758 return (error); 759 } 760 761 static int 762 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 763 int *exflagsp, struct ucred **credanonp) 764 { 765 hammer_mount_t hmp = (void *)mp->mnt_data; 766 struct netcred *np; 767 int error; 768 769 np = vfs_export_lookup(mp, &hmp->export, nam); 770 if (np) { 771 *exflagsp = np->netc_exflags; 772 *credanonp = &np->netc_anon; 773 error = 0; 774 } else { 775 error = EACCES; 776 } 777 return (error); 778 779 } 780 781 int 782 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export) 783 { 784 hammer_mount_t hmp = (void *)mp->mnt_data; 785 int error; 786 787 switch(op) { 788 case MOUNTCTL_SET_EXPORT: 789 error = vfs_export(mp, &hmp->export, export); 790 break; 791 default: 792 error = EOPNOTSUPP; 793 break; 794 } 795 return(error); 796 } 797 798