chfs_vfsops.c revision 1.15.4.1
1 /* $NetBSD: chfs_vfsops.c,v 1.15.4.1 2017/04/21 16:54:08 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 Department of Software Engineering, 5 * University of Szeged, Hungary 6 * Copyright (C) 2010 Tamas Toth <ttoth (at) inf.u-szeged.hu> 7 * Copyright (C) 2010 Adam Hoka <ahoka (at) NetBSD.org> 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by the Department of Software Engineering, University of Szeged, Hungary 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR 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 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/kmem.h> 40 #include <sys/mount.h> 41 #include <sys/stat.h> 42 #include <sys/systm.h> 43 #include <sys/proc.h> 44 #include <sys/module.h> 45 #include <sys/namei.h> 46 #include <sys/fcntl.h> 47 #include <sys/conf.h> 48 #include <sys/buf.h> 49 //XXX needed just for debugging 50 #include <sys/fstrans.h> 51 #include <sys/sleepq.h> 52 #include <sys/lockdebug.h> 53 #include <sys/ktrace.h> 54 55 #include <uvm/uvm.h> 56 #include <uvm/uvm_pager.h> 57 #include <ufs/ufs/dir.h> 58 #include <ufs/ufs/ufs_extern.h> 59 #include <miscfs/genfs/genfs.h> 60 #include <miscfs/genfs/genfs_node.h> 61 #include <miscfs/specfs/specdev.h> 62 #include "chfs.h" 63 #include "chfs_args.h" 64 65 MODULE(MODULE_CLASS_VFS, chfs, "flash"); 66 67 /* --------------------------------------------------------------------- */ 68 /* functions */ 69 70 static int chfs_mount(struct mount *, const char *, void *, size_t *); 71 static int chfs_unmount(struct mount *, int); 72 static int chfs_root(struct mount *, struct vnode **); 73 static int chfs_loadvnode(struct mount *, struct vnode *, 74 const void *, size_t, const void **); 75 static int chfs_vget(struct mount *, ino_t, struct vnode **); 76 static int chfs_fhtovp(struct mount *, struct fid *, struct vnode **); 77 static int chfs_vptofh(struct vnode *, struct fid *, size_t *); 78 static int chfs_start(struct mount *, int); 79 static int chfs_statvfs(struct mount *, struct statvfs *); 80 static int chfs_sync(struct mount *, int, kauth_cred_t); 81 static void chfs_init(void); 82 static void chfs_reinit(void); 83 static void chfs_done(void); 84 static int chfs_snapshot(struct mount *, struct vnode *, 85 struct timespec *); 86 87 /* --------------------------------------------------------------------- */ 88 /* structures */ 89 90 int 91 chfs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, 92 kauth_cred_t cred) 93 { 94 return (0); 95 } 96 97 const struct genfs_ops chfs_genfsops = { 98 .gop_size = genfs_size, 99 .gop_alloc = chfs_gop_alloc, 100 .gop_write = genfs_gop_write, 101 .gop_markupdate = ufs_gop_markupdate, 102 }; 103 104 struct pool chfs_inode_pool; 105 106 /* for looking up the major for flash */ 107 extern const struct cdevsw flash_cdevsw; 108 109 /* --------------------------------------------------------------------- */ 110 111 static int 112 chfs_mount(struct mount *mp, 113 const char *path, void *data, size_t *data_len) 114 { 115 struct lwp *l = curlwp; 116 struct nameidata nd; 117 struct pathbuf *pb; 118 struct vnode *devvp = NULL; 119 struct ufs_args *args = data; 120 struct ufsmount *ump = NULL; 121 struct chfs_mount *chmp; 122 int err = 0; 123 int xflags; 124 125 dbg("mount()\n"); 126 127 if (args == NULL) 128 return EINVAL; 129 if (*data_len < sizeof *args) 130 return EINVAL; 131 132 if (mp->mnt_flag & MNT_GETARGS) { 133 ump = VFSTOUFS(mp); 134 if (ump == NULL) 135 return EIO; 136 memset(args, 0, sizeof *args); 137 args->fspec = NULL; 138 *data_len = sizeof *args; 139 return 0; 140 } 141 142 if (mp->mnt_flag & MNT_UPDATE) { 143 /* XXX: There is no support yet to update file system 144 * settings. Should be added. */ 145 146 return ENODEV; 147 } 148 149 if (args->fspec != NULL) { 150 err = pathbuf_copyin(args->fspec, &pb); 151 if (err) { 152 return err; 153 } 154 /* Look up the name and verify that it's sane. */ 155 NDINIT(&nd, LOOKUP, FOLLOW, pb); 156 err = namei(&nd); 157 pathbuf_destroy(pb); 158 if (err) 159 return err; 160 devvp = nd.ni_vp; 161 162 /* Be sure this is a valid block device */ 163 if (devvp->v_type != VBLK) 164 err = ENOTBLK; 165 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 166 err = ENXIO; 167 } 168 169 if (err) { 170 vrele(devvp); 171 return (err); 172 } 173 174 if (mp->mnt_flag & MNT_RDONLY) 175 xflags = FREAD; 176 else 177 xflags = FREAD|FWRITE; 178 179 err = VOP_OPEN(devvp, xflags, FSCRED); 180 if (err) 181 goto fail; 182 183 /* call CHFS mount function */ 184 err = chfs_mountfs(devvp, mp); 185 if (err) { 186 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 187 (void)VOP_CLOSE(devvp, xflags, NOCRED); 188 VOP_UNLOCK(devvp); 189 goto fail; 190 } 191 192 ump = VFSTOUFS(mp); 193 chmp = ump->um_chfs; 194 195 vfs_getnewfsid(mp); 196 chmp->chm_fsmp = mp; 197 198 return set_statvfs_info(path, 199 UIO_USERSPACE, args->fspec, 200 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 201 202 fail: 203 vrele(devvp); 204 return (err); 205 } 206 207 /* chfs_mountfs - init CHFS */ 208 int 209 chfs_mountfs(struct vnode *devvp, struct mount *mp) 210 { 211 struct lwp *l = curlwp; 212 kauth_cred_t cred; 213 devmajor_t flash_major; 214 dev_t dev; 215 struct ufsmount* ump = NULL; 216 struct chfs_mount* chmp; 217 struct vnode *vp; 218 int err = 0; 219 220 dbg("mountfs()\n"); 221 222 dev = devvp->v_rdev; 223 cred = l ? l->l_cred : NOCRED; 224 225 /* Flush out any old buffers remaining from a previous use. */ 226 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 227 err = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 228 VOP_UNLOCK(devvp); 229 if (err) 230 return (err); 231 232 /* Setup device. */ 233 flash_major = cdevsw_lookup_major(&flash_cdevsw); 234 235 if (devvp->v_type != VBLK) 236 err = ENOTBLK; 237 else if (bdevsw_lookup(dev) == NULL) 238 err = ENXIO; 239 else if (major(dev) != flash_major) { 240 dbg("major(dev): %d, flash_major: %d\n", 241 major(dev), flash_major); 242 err = ENODEV; 243 } 244 if (err) { 245 vrele(devvp); 246 return (err); 247 } 248 249 /* Connect CHFS to UFS. */ 250 ump = kmem_zalloc(sizeof(struct ufsmount), KM_SLEEP); 251 252 ump->um_fstype = UFS1; 253 ump->um_chfs = kmem_zalloc(sizeof(struct chfs_mount), KM_SLEEP); 254 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 255 256 chmp = ump->um_chfs; 257 258 /* Initialize erase block handler. */ 259 chmp->chm_ebh = kmem_alloc(sizeof(struct chfs_ebh), KM_SLEEP); 260 261 dbg("[]opening flash: %u\n", (unsigned int)devvp->v_rdev); 262 err = ebh_open(chmp->chm_ebh, devvp->v_rdev); 263 if (err) { 264 dbg("error while opening flash\n"); 265 goto fail; 266 } 267 268 //TODO check flash sizes 269 270 /* Initialize vnode cache's hashtable and eraseblock array. */ 271 chmp->chm_gbl_version = 0; 272 chmp->chm_vnocache_hash = chfs_vnocache_hash_init(); 273 274 chmp->chm_blocks = kmem_zalloc(chmp->chm_ebh->peb_nr * 275 sizeof(struct chfs_eraseblock), KM_SLEEP); 276 277 /* Initialize mutexes. */ 278 mutex_init(&chmp->chm_lock_mountfields, MUTEX_DEFAULT, IPL_NONE); 279 mutex_init(&chmp->chm_lock_sizes, MUTEX_DEFAULT, IPL_NONE); 280 mutex_init(&chmp->chm_lock_vnocache, MUTEX_DEFAULT, IPL_NONE); 281 282 /* Initialize read/write contants. (from UFS) */ 283 chmp->chm_fs_bmask = -4096; 284 chmp->chm_fs_bsize = 4096; 285 chmp->chm_fs_qbmask = 4095; 286 chmp->chm_fs_bshift = 12; 287 chmp->chm_fs_fmask = -2048; 288 chmp->chm_fs_qfmask = 2047; 289 290 /* Initialize writebuffer. */ 291 chmp->chm_wbuf_pagesize = chmp->chm_ebh->flash_if->page_size; 292 dbg("wbuf size: %zu\n", chmp->chm_wbuf_pagesize); 293 chmp->chm_wbuf = kmem_alloc(chmp->chm_wbuf_pagesize, KM_SLEEP); 294 rw_init(&chmp->chm_lock_wbuf); 295 296 /* Initialize queues. */ 297 TAILQ_INIT(&chmp->chm_free_queue); 298 TAILQ_INIT(&chmp->chm_clean_queue); 299 TAILQ_INIT(&chmp->chm_dirty_queue); 300 TAILQ_INIT(&chmp->chm_very_dirty_queue); 301 TAILQ_INIT(&chmp->chm_erasable_pending_wbuf_queue); 302 TAILQ_INIT(&chmp->chm_erase_pending_queue); 303 304 /* Initialize flash-specific constants. */ 305 chfs_calc_trigger_levels(chmp); 306 307 /* Initialize sizes. */ 308 chmp->chm_nr_free_blocks = 0; 309 chmp->chm_nr_erasable_blocks = 0; 310 chmp->chm_max_vno = 2; 311 chmp->chm_checked_vno = 2; 312 chmp->chm_unchecked_size = 0; 313 chmp->chm_used_size = 0; 314 chmp->chm_dirty_size = 0; 315 chmp->chm_wasted_size = 0; 316 chmp->chm_free_size = chmp->chm_ebh->eb_size * chmp->chm_ebh->peb_nr; 317 318 /* Build filesystem. */ 319 err = chfs_build_filesystem(chmp); 320 321 if (err) { 322 /* Armageddon and return. */ 323 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 324 ebh_close(chmp->chm_ebh); 325 err = EIO; 326 goto fail; 327 } 328 329 /* Initialize UFS. */ 330 mp->mnt_data = ump; 331 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 332 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CHFS); 333 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 334 mp->mnt_stat.f_namemax = MAXNAMLEN; 335 mp->mnt_flag |= MNT_LOCAL; 336 mp->mnt_fs_bshift = PAGE_SHIFT; 337 mp->mnt_dev_bshift = DEV_BSHIFT; 338 mp->mnt_iflag |= IMNT_MPSAFE; 339 ump->um_flags = 0; 340 ump->um_mountp = mp; 341 ump->um_dev = dev; 342 ump->um_devvp = devvp; 343 ump->um_maxfilesize = 1048512 * 1024; 344 345 /* Allocate the root vnode. */ 346 err = VFS_VGET(mp, CHFS_ROOTINO, &vp); 347 if (err) { 348 dbg("error: %d while allocating root node\n", err); 349 return err; 350 } 351 vput(vp); 352 353 /* Start GC. */ 354 chfs_gc_thread_start(chmp); 355 mutex_enter(&chmp->chm_lock_mountfields); 356 chfs_gc_trigger(chmp); 357 mutex_exit(&chmp->chm_lock_mountfields); 358 359 spec_node_setmountedfs(devvp, mp); 360 return 0; 361 362 fail: 363 kmem_free(chmp->chm_ebh, sizeof(struct chfs_ebh)); 364 kmem_free(chmp, sizeof(struct chfs_mount)); 365 kmem_free(ump, sizeof(struct ufsmount)); 366 return err; 367 } 368 369 /* --------------------------------------------------------------------- */ 370 371 static int 372 chfs_unmount(struct mount *mp, int mntflags) 373 { 374 int flags = 0, i = 0; 375 struct ufsmount *ump; 376 struct chfs_mount *chmp; 377 378 if (mntflags & MNT_FORCE) 379 flags |= FORCECLOSE; 380 381 dbg("[START]\n"); 382 383 ump = VFSTOUFS(mp); 384 chmp = ump->um_chfs; 385 386 /* Stop GC. */ 387 chfs_gc_thread_stop(chmp); 388 389 /* Flush everyt buffer. */ 390 (void)vflush(mp, NULLVP, flags); 391 392 if (chmp->chm_wbuf_len) { 393 mutex_enter(&chmp->chm_lock_mountfields); 394 chfs_flush_pending_wbuf(chmp); 395 mutex_exit(&chmp->chm_lock_mountfields); 396 } 397 398 /* Free node references. */ 399 for (i = 0; i < chmp->chm_ebh->peb_nr; i++) { 400 chfs_free_node_refs(&chmp->chm_blocks[i]); 401 } 402 403 /* Destroy vnode cache hashtable. */ 404 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 405 406 /* Close eraseblock handler. */ 407 ebh_close(chmp->chm_ebh); 408 409 /* Destroy mutexes. */ 410 rw_destroy(&chmp->chm_lock_wbuf); 411 mutex_destroy(&chmp->chm_lock_vnocache); 412 mutex_destroy(&chmp->chm_lock_sizes); 413 mutex_destroy(&chmp->chm_lock_mountfields); 414 415 /* Unmount UFS. */ 416 if (ump->um_devvp->v_type != VBAD) { 417 spec_node_setmountedfs(ump->um_devvp, NULL); 418 } 419 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 420 (void)VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED); 421 vput(ump->um_devvp); 422 423 mutex_destroy(&ump->um_lock); 424 425 /* Everything done. */ 426 kmem_free(ump, sizeof(struct ufsmount)); 427 mp->mnt_data = NULL; 428 mp->mnt_flag &= ~MNT_LOCAL; 429 dbg("[END]\n"); 430 return (0); 431 } 432 433 /* --------------------------------------------------------------------- */ 434 435 static int 436 chfs_root(struct mount *mp, struct vnode **vpp) 437 { 438 struct vnode *vp; 439 int error; 440 441 if ((error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, &vp)) != 0) 442 return error; 443 *vpp = vp; 444 return 0; 445 } 446 447 /* --------------------------------------------------------------------- */ 448 449 extern rb_tree_ops_t frag_rbtree_ops; 450 451 static int 452 chfs_loadvnode(struct mount *mp, struct vnode *vp, 453 const void *key, size_t key_len, const void **new_key) 454 { 455 struct chfs_mount *chmp; 456 struct chfs_inode *ip; 457 struct ufsmount *ump; 458 dev_t dev; 459 int error; 460 struct chfs_vnode_cache* chvc = NULL; 461 struct chfs_node_ref* nref = NULL; 462 struct buf *bp; 463 ino_t ino; 464 465 KASSERT(key_len == sizeof(ino)); 466 memcpy(&ino, key, key_len); 467 468 dbg("vget() | ino: %llu\n", (unsigned long long)ino); 469 470 ump = VFSTOUFS(mp); 471 dev = ump->um_dev; 472 473 ip = pool_get(&chfs_inode_pool, PR_WAITOK); 474 475 /* Initialize vnode/inode. */ 476 memset(ip, 0, sizeof(*ip)); 477 ip->vp = vp; 478 ip->ump = ump; 479 ip->chmp = chmp = ump->um_chfs; 480 ip->dev = dev; 481 ip->ino = ino; 482 483 rb_tree_init(&ip->fragtree, &frag_rbtree_ops); 484 485 vp->v_tag = VT_CHFS; 486 vp->v_op = chfs_vnodeop_p; 487 vp->v_vflag |= VV_LOCKSWORK; 488 if (ino == CHFS_ROOTINO) 489 vp->v_vflag |= VV_ROOT; 490 vp->v_data = ip; 491 492 /* Set root inode. */ 493 if (ino == CHFS_ROOTINO) { 494 dbg("SETROOT\n"); 495 vp->v_type = VDIR; 496 ip->ch_type = CHT_DIR; 497 ip->mode = IFMT | IEXEC | IWRITE | IREAD; 498 ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE); 499 chfs_update(vp, NULL, NULL, UPDATE_WAIT); 500 TAILQ_INIT(&ip->dents); 501 chfs_set_vnode_size(vp, 512); 502 } 503 504 mutex_enter(&chmp->chm_lock_vnocache); 505 chvc = chfs_vnode_cache_get(chmp, ino); 506 mutex_exit(&chmp->chm_lock_vnocache); 507 if (!chvc) { 508 dbg("!chvc\n"); 509 /* Initialize the corresponding vnode cache. */ 510 /* XXX, we cant alloc under a lock, refactor this! */ 511 chvc = chfs_vnode_cache_alloc(ino); 512 mutex_enter(&chmp->chm_lock_vnocache); 513 if (ino == CHFS_ROOTINO) { 514 chvc->nlink = 2; 515 chvc->pvno = CHFS_ROOTINO; 516 chvc->state = VNO_STATE_CHECKEDABSENT; 517 } 518 chfs_vnode_cache_add(chmp, chvc); 519 mutex_exit(&chmp->chm_lock_vnocache); 520 521 ip->chvc = chvc; 522 TAILQ_INIT(&ip->dents); 523 } else { 524 dbg("chvc\n"); 525 ip->chvc = chvc; 526 /* We had a vnode cache, the node is already on flash, so read it */ 527 if (ino == CHFS_ROOTINO) { 528 chvc->pvno = CHFS_ROOTINO; 529 TAILQ_INIT(&chvc->scan_dirents); 530 } else { 531 chfs_readvnode(mp, ino, &vp); 532 } 533 534 mutex_enter(&chmp->chm_lock_mountfields); 535 /* Initialize type specific things. */ 536 error = 0; 537 switch (ip->ch_type) { 538 case CHT_DIR: 539 /* Read every dirent. */ 540 nref = chvc->dirents; 541 while (nref && 542 (struct chfs_vnode_cache *)nref != chvc) { 543 chfs_readdirent(mp, nref, ip); 544 nref = nref->nref_next; 545 } 546 chfs_set_vnode_size(vp, 512); 547 break; 548 case CHT_REG: 549 /* FALLTHROUGH */ 550 case CHT_SOCK: 551 /* Collect data. */ 552 dbg("read_inode_internal | ino: %llu\n", 553 (unsigned long long)ip->ino); 554 error = chfs_read_inode(chmp, ip); 555 break; 556 case CHT_LNK: 557 /* Collect data. */ 558 dbg("read_inode_internal | ino: %llu\n", 559 (unsigned long long)ip->ino); 560 error = chfs_read_inode_internal(chmp, ip); 561 if (error) 562 break; 563 564 /* Set link. */ 565 dbg("size: %llu\n", (unsigned long long)ip->size); 566 bp = getiobuf(vp, true); 567 bp->b_blkno = 0; 568 bp->b_bufsize = bp->b_resid = 569 bp->b_bcount = ip->size; 570 bp->b_data = kmem_alloc(ip->size, KM_SLEEP); 571 chfs_read_data(chmp, vp, bp); 572 if (!ip->target) 573 ip->target = kmem_alloc(ip->size, 574 KM_SLEEP); 575 memcpy(ip->target, bp->b_data, ip->size); 576 kmem_free(bp->b_data, ip->size); 577 putiobuf(bp); 578 579 break; 580 case CHT_CHR: 581 /* FALLTHROUGH */ 582 case CHT_BLK: 583 /* FALLTHROUGH */ 584 case CHT_FIFO: 585 /* Collect data. */ 586 dbg("read_inode_internal | ino: %llu\n", 587 (unsigned long long)ip->ino); 588 error = chfs_read_inode_internal(chmp, ip); 589 if (error) 590 break; 591 592 /* Set device. */ 593 bp = getiobuf(vp, true); 594 bp->b_blkno = 0; 595 bp->b_bufsize = bp->b_resid = 596 bp->b_bcount = sizeof(dev_t); 597 bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP); 598 chfs_read_data(chmp, vp, bp); 599 memcpy(&ip->rdev, 600 bp->b_data, sizeof(dev_t)); 601 kmem_free(bp->b_data, sizeof(dev_t)); 602 putiobuf(bp); 603 /* Set specific operations. */ 604 if (ip->ch_type == CHT_FIFO) { 605 vp->v_op = chfs_fifoop_p; 606 } else { 607 vp->v_op = chfs_specop_p; 608 spec_node_init(vp, ip->rdev); 609 } 610 611 break; 612 case CHT_BLANK: 613 /* FALLTHROUGH */ 614 case CHT_BAD: 615 break; 616 } 617 mutex_exit(&chmp->chm_lock_mountfields); 618 if (error) { 619 vp->v_data = NULL; 620 KASSERT(TAILQ_FIRST(&ip->dents) == NULL); 621 pool_put(&chfs_inode_pool, ip); 622 return error; 623 } 624 625 } 626 627 /* Finish inode initalization. */ 628 ip->ch_type = VTTOCHT(vp->v_type); 629 ip->devvp = ump->um_devvp; 630 vref(ip->devvp); 631 632 genfs_node_init(vp, &chfs_genfsops); 633 uvm_vnp_setsize(vp, ip->size); 634 635 *new_key = &ip->ino; 636 637 return 0; 638 } 639 640 /* --------------------------------------------------------------------- */ 641 642 static int 643 chfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 644 { 645 int error; 646 647 error = vcache_get(mp, &ino, sizeof(ino), vpp); 648 if (error) 649 return error; 650 651 error = vn_lock(*vpp, LK_EXCLUSIVE); 652 if (error) { 653 vrele(*vpp); 654 *vpp = NULL; 655 return error; 656 } 657 658 return 0; 659 } 660 661 /* --------------------------------------------------------------------- */ 662 663 664 static int 665 chfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 666 { 667 return ENODEV; 668 } 669 670 /* --------------------------------------------------------------------- */ 671 672 static int 673 chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 674 { 675 return ENODEV; 676 } 677 678 /* --------------------------------------------------------------------- */ 679 680 static int 681 chfs_start(struct mount *mp, int flags) 682 { 683 return 0; 684 } 685 686 /* --------------------------------------------------------------------- */ 687 688 static int 689 chfs_statvfs(struct mount *mp, struct statvfs *sbp) 690 { 691 struct chfs_mount *chmp; 692 struct ufsmount *ump; 693 dbg("statvfs\n"); 694 695 ump = VFSTOUFS(mp); 696 chmp = ump->um_chfs; 697 698 sbp->f_flag = mp->mnt_flag; 699 sbp->f_bsize = chmp->chm_ebh->eb_size; 700 sbp->f_frsize = chmp->chm_ebh->eb_size; 701 sbp->f_iosize = chmp->chm_ebh->eb_size; 702 703 sbp->f_blocks = chmp->chm_ebh->peb_nr; 704 sbp->f_files = 0; 705 sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write; 706 707 sbp->f_bfree = chmp->chm_nr_free_blocks; 708 sbp->f_bresvd = chmp->chm_resv_blocks_write; 709 710 /* FFS specific */ 711 sbp->f_ffree = 0; 712 sbp->f_favail = 0; 713 sbp->f_fresvd = 0; 714 715 copy_statvfs_info(sbp, mp); 716 717 return 0; 718 } 719 720 /* --------------------------------------------------------------------- */ 721 722 static int 723 chfs_sync(struct mount *mp, int waitfor, 724 kauth_cred_t uc) 725 { 726 return 0; 727 } 728 729 /* --------------------------------------------------------------------- */ 730 731 static void 732 chfs_init(void) 733 { 734 /* Initialize pools and inode hash. */ 735 chfs_alloc_pool_caches(); 736 pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0, 737 "chfsinopl", &pool_allocator_nointr, IPL_NONE); 738 ufs_init(); 739 } 740 741 /* --------------------------------------------------------------------- */ 742 743 static void 744 chfs_reinit(void) 745 { 746 ufs_reinit(); 747 } 748 749 /* --------------------------------------------------------------------- */ 750 751 static void 752 chfs_done(void) 753 { 754 ufs_done(); 755 pool_destroy(&chfs_inode_pool); 756 chfs_destroy_pool_caches(); 757 } 758 759 /* --------------------------------------------------------------------- */ 760 761 static int 762 chfs_snapshot(struct mount *mp, struct vnode *vp, 763 struct timespec *ctime) 764 { 765 return ENODEV; 766 } 767 768 /* --------------------------------------------------------------------- */ 769 770 /* 771 * chfs vfs operations. 772 */ 773 774 extern const struct vnodeopv_desc chfs_fifoop_opv_desc; 775 extern const struct vnodeopv_desc chfs_specop_opv_desc; 776 extern const struct vnodeopv_desc chfs_vnodeop_opv_desc; 777 778 const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = { 779 &chfs_fifoop_opv_desc, 780 &chfs_specop_opv_desc, 781 &chfs_vnodeop_opv_desc, 782 NULL, 783 }; 784 785 struct vfsops chfs_vfsops = { 786 .vfs_name = MOUNT_CHFS, 787 .vfs_min_mount_data = sizeof (struct chfs_args), 788 .vfs_mount = chfs_mount, 789 .vfs_start = chfs_start, 790 .vfs_unmount = chfs_unmount, 791 .vfs_root = chfs_root, 792 .vfs_quotactl = ufs_quotactl, 793 .vfs_statvfs = chfs_statvfs, 794 .vfs_sync = chfs_sync, 795 .vfs_vget = chfs_vget, 796 .vfs_loadvnode = chfs_loadvnode, 797 .vfs_fhtovp = chfs_fhtovp, 798 .vfs_vptofh = chfs_vptofh, 799 .vfs_init = chfs_init, 800 .vfs_reinit = chfs_reinit, 801 .vfs_done = chfs_done, 802 .vfs_snapshot = chfs_snapshot, 803 .vfs_extattrctl = vfs_stdextattrctl, 804 .vfs_suspendctl = genfs_suspendctl, 805 .vfs_renamelock_enter = genfs_renamelock_enter, 806 .vfs_renamelock_exit = genfs_renamelock_exit, 807 .vfs_fsync = (void *)eopnotsupp, 808 .vfs_opv_descs = chfs_vnodeopv_descs 809 }; 810 811 /* For using CHFS as a module. */ 812 static int 813 chfs_modcmd(modcmd_t cmd, void *arg) 814 { 815 switch (cmd) { 816 case MODULE_CMD_INIT: 817 return vfs_attach(&chfs_vfsops); 818 case MODULE_CMD_FINI: 819 return vfs_detach(&chfs_vfsops); 820 default: 821 return ENOTTY; 822 } 823 } 824
Indexes created Sat Oct 18 21:09:54 GMT 2025