1 /* $NetBSD: chfs_vfsops.c,v 1.24 2025/05/28 06:06:54 andvar 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_extern.h> 56 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 /* --------------------------------------------------------------------- */ 66 /* functions */ 67 68 static int chfs_mount(struct mount *, const char *, void *, size_t *); 69 static int chfs_unmount(struct mount *, int); 70 static int chfs_root(struct mount *, int, struct vnode **); 71 static int chfs_loadvnode(struct mount *, struct vnode *, 72 const void *, size_t, const void **); 73 static int chfs_vget(struct mount *, ino_t, int, struct vnode **); 74 static int chfs_fhtovp(struct mount *, struct fid *, int, struct vnode **); 75 static int chfs_vptofh(struct vnode *, struct fid *, size_t *); 76 static int chfs_start(struct mount *, int); 77 static int chfs_statvfs(struct mount *, struct statvfs *); 78 static int chfs_sync(struct mount *, int, kauth_cred_t); 79 static void chfs_init(void); 80 static void chfs_reinit(void); 81 static void chfs_done(void); 82 static int chfs_snapshot(struct mount *, struct vnode *, 83 struct timespec *); 84 85 /* --------------------------------------------------------------------- */ 86 /* structures */ 87 88 int 89 chfs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, 90 kauth_cred_t cred) 91 { 92 return (0); 93 } 94 95 const struct genfs_ops chfs_genfsops = { 96 .gop_size = genfs_size, 97 .gop_alloc = chfs_gop_alloc, 98 .gop_write = genfs_gop_write, 99 .gop_markupdate = ufs_gop_markupdate, 100 .gop_putrange = genfs_gop_putrange, 101 }; 102 103 struct pool chfs_inode_pool; 104 105 /* for looking up the major for flash */ 106 extern const struct cdevsw flash_cdevsw; 107 108 /* --------------------------------------------------------------------- */ 109 110 static int 111 chfs_mount(struct mount *mp, 112 const char *path, void *data, size_t *data_len) 113 { 114 struct lwp *l = curlwp; 115 struct nameidata nd; 116 struct pathbuf *pb; 117 struct vnode *devvp = NULL; 118 struct ufs_args *args = data; 119 struct ufsmount *ump = NULL; 120 struct chfs_mount *chmp; 121 int err = 0; 122 int xflags; 123 124 dbg("mount()\n"); 125 126 if (args == NULL) 127 return EINVAL; 128 if (*data_len < sizeof *args) 129 return EINVAL; 130 131 if (mp->mnt_flag & MNT_GETARGS) { 132 ump = VFSTOUFS(mp); 133 if (ump == NULL) 134 return EIO; 135 memset(args, 0, sizeof *args); 136 args->fspec = NULL; 137 *data_len = sizeof *args; 138 return 0; 139 } 140 141 if (mp->mnt_flag & MNT_UPDATE) { 142 /* XXX: There is no support yet to update file system 143 * settings. Should be added. */ 144 145 return ENODEV; 146 } 147 148 if (args->fspec != NULL) { 149 err = pathbuf_copyin(args->fspec, &pb); 150 if (err) { 151 return err; 152 } 153 /* Look up the name and verify that it's sane. */ 154 NDINIT(&nd, LOOKUP, FOLLOW, pb); 155 err = namei(&nd); 156 pathbuf_destroy(pb); 157 if (err) 158 return err; 159 devvp = nd.ni_vp; 160 161 /* Be sure this is a valid block device */ 162 if (devvp->v_type != VBLK) 163 err = ENOTBLK; 164 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 165 err = ENXIO; 166 } 167 168 if (err) { 169 vrele(devvp); 170 return (err); 171 } 172 173 if (mp->mnt_flag & MNT_RDONLY) 174 xflags = FREAD; 175 else 176 xflags = FREAD|FWRITE; 177 178 err = VOP_OPEN(devvp, xflags, FSCRED); 179 if (err) 180 goto fail; 181 182 /* call CHFS mount function */ 183 err = chfs_mountfs(devvp, mp); 184 if (err) { 185 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 186 (void)VOP_CLOSE(devvp, xflags, NOCRED); 187 VOP_UNLOCK(devvp); 188 goto fail; 189 } 190 191 ump = VFSTOUFS(mp); 192 chmp = ump->um_chfs; 193 194 vfs_getnewfsid(mp); 195 chmp->chm_fsmp = mp; 196 197 return set_statvfs_info(path, 198 UIO_USERSPACE, args->fspec, 199 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 200 201 fail: 202 vrele(devvp); 203 return (err); 204 } 205 206 /* chfs_mountfs - init CHFS */ 207 int 208 chfs_mountfs(struct vnode *devvp, struct mount *mp) 209 { 210 struct lwp *l = curlwp; 211 kauth_cred_t cred; 212 devmajor_t flash_major; 213 dev_t dev; 214 struct ufsmount* ump = NULL; 215 struct chfs_mount* chmp; 216 struct vnode *vp; 217 int err = 0; 218 219 dbg("mountfs()\n"); 220 221 dev = devvp->v_rdev; 222 cred = l ? l->l_cred : NOCRED; 223 224 /* Flush out any old buffers remaining from a previous use. */ 225 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 226 err = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 227 VOP_UNLOCK(devvp); 228 if (err) 229 goto fail0; 230 231 /* Setup device. */ 232 flash_major = cdevsw_lookup_major(&flash_cdevsw); 233 234 if (devvp->v_type != VBLK) 235 err = ENOTBLK; 236 else if (bdevsw_lookup(dev) == NULL) 237 err = ENXIO; 238 else if (major(dev) != flash_major) { 239 dbg("major(dev): %d, flash_major: %d\n", 240 major(dev), flash_major); 241 err = ENODEV; 242 } 243 if (err) 244 goto fail0; 245 246 /* Connect CHFS to UFS. */ 247 ump = kmem_zalloc(sizeof(struct ufsmount), KM_SLEEP); 248 249 ump->um_fstype = UFS1; 250 ump->um_chfs = kmem_zalloc(sizeof(struct chfs_mount), KM_SLEEP); 251 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 252 253 chmp = ump->um_chfs; 254 255 /* Initialize erase block handler. */ 256 chmp->chm_ebh = kmem_alloc(sizeof(struct chfs_ebh), KM_SLEEP); 257 258 dbg("[]opening flash: %u\n", (unsigned int)devvp->v_rdev); 259 err = ebh_open(chmp->chm_ebh, devvp->v_rdev); 260 if (err) { 261 dbg("error while opening flash\n"); 262 goto fail1; 263 } 264 265 //TODO check flash sizes 266 267 /* Initialize vnode cache's hashtable and eraseblock array. */ 268 chmp->chm_gbl_version = 0; 269 chmp->chm_vnocache_hash = chfs_vnocache_hash_init(); 270 271 chmp->chm_blocks = kmem_zalloc(chmp->chm_ebh->peb_nr * 272 sizeof(struct chfs_eraseblock), KM_SLEEP); 273 274 /* Initialize mutexes. */ 275 mutex_init(&chmp->chm_lock_mountfields, MUTEX_DEFAULT, IPL_NONE); 276 mutex_init(&chmp->chm_lock_sizes, MUTEX_DEFAULT, IPL_NONE); 277 mutex_init(&chmp->chm_lock_vnocache, MUTEX_DEFAULT, IPL_NONE); 278 279 /* Initialize read/write constants. (from UFS) */ 280 chmp->chm_fs_bmask = -4096; 281 chmp->chm_fs_bsize = 4096; 282 chmp->chm_fs_qbmask = 4095; 283 chmp->chm_fs_bshift = 12; 284 chmp->chm_fs_fmask = -2048; 285 chmp->chm_fs_qfmask = 2047; 286 287 /* Initialize writebuffer. */ 288 chmp->chm_wbuf_pagesize = chmp->chm_ebh->flash_if->page_size; 289 dbg("wbuf size: %zu\n", chmp->chm_wbuf_pagesize); 290 chmp->chm_wbuf = kmem_alloc(chmp->chm_wbuf_pagesize, KM_SLEEP); 291 rw_init(&chmp->chm_lock_wbuf); 292 293 /* Initialize queues. */ 294 TAILQ_INIT(&chmp->chm_free_queue); 295 TAILQ_INIT(&chmp->chm_clean_queue); 296 TAILQ_INIT(&chmp->chm_dirty_queue); 297 TAILQ_INIT(&chmp->chm_very_dirty_queue); 298 TAILQ_INIT(&chmp->chm_erasable_pending_wbuf_queue); 299 TAILQ_INIT(&chmp->chm_erase_pending_queue); 300 301 /* Initialize flash-specific constants. */ 302 chfs_calc_trigger_levels(chmp); 303 304 /* Initialize sizes. */ 305 chmp->chm_nr_free_blocks = 0; 306 chmp->chm_nr_erasable_blocks = 0; 307 chmp->chm_max_vno = 2; 308 chmp->chm_checked_vno = 2; 309 chmp->chm_unchecked_size = 0; 310 chmp->chm_used_size = 0; 311 chmp->chm_dirty_size = 0; 312 chmp->chm_wasted_size = 0; 313 chmp->chm_free_size = chmp->chm_ebh->eb_size * chmp->chm_ebh->peb_nr; 314 315 /* Build filesystem. */ 316 err = chfs_build_filesystem(chmp); 317 318 if (err) { 319 /* Armageddon and return. */ 320 err = EIO; 321 goto fail2; 322 } 323 324 /* Initialize UFS. */ 325 mp->mnt_data = ump; 326 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 327 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CHFS); 328 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 329 mp->mnt_stat.f_namemax = MAXNAMLEN; 330 mp->mnt_flag |= MNT_LOCAL; 331 mp->mnt_fs_bshift = PAGE_SHIFT; 332 mp->mnt_dev_bshift = DEV_BSHIFT; 333 mp->mnt_iflag |= IMNT_MPSAFE; 334 ump->um_flags = 0; 335 ump->um_mountp = mp; 336 ump->um_dev = dev; 337 ump->um_devvp = devvp; 338 ump->um_maxfilesize = 1048512 * 1024; 339 340 /* Allocate the root vnode. */ 341 err = VFS_VGET(mp, CHFS_ROOTINO, LK_EXCLUSIVE, &vp); 342 if (err) { 343 dbg("error: %d while allocating root node\n", err); 344 return err; 345 } 346 vput(vp); 347 348 /* Start GC. */ 349 chfs_gc_thread_start(chmp); 350 mutex_enter(&chmp->chm_lock_mountfields); 351 chfs_gc_trigger(chmp); 352 mutex_exit(&chmp->chm_lock_mountfields); 353 354 spec_node_setmountedfs(devvp, mp); 355 return 0; 356 357 fail2: 358 KASSERT(TAILQ_EMPTY(&chmp->chm_erase_pending_queue)); 359 KASSERT(TAILQ_EMPTY(&chmp->chm_erasable_pending_wbuf_queue)); 360 KASSERT(TAILQ_EMPTY(&chmp->chm_very_dirty_queue)); 361 KASSERT(TAILQ_EMPTY(&chmp->chm_dirty_queue)); 362 KASSERT(TAILQ_EMPTY(&chmp->chm_clean_queue)); 363 KASSERT(TAILQ_EMPTY(&chmp->chm_free_queue)); 364 rw_destroy(&chmp->chm_lock_wbuf); 365 kmem_free(chmp->chm_wbuf, chmp->chm_wbuf_pagesize); 366 mutex_destroy(&chmp->chm_lock_vnocache); 367 mutex_destroy(&chmp->chm_lock_sizes); 368 mutex_destroy(&chmp->chm_lock_mountfields); 369 kmem_free(chmp->chm_blocks, chmp->chm_ebh->peb_nr * 370 sizeof(struct chfs_eraseblock)); 371 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 372 ebh_close(chmp->chm_ebh); 373 374 fail1: 375 kmem_free(chmp->chm_ebh, sizeof(struct chfs_ebh)); 376 mutex_destroy(&ump->um_lock); 377 kmem_free(chmp, sizeof(struct chfs_mount)); 378 kmem_free(ump, sizeof(struct ufsmount)); 379 380 fail0: 381 KASSERT(err); 382 return err; 383 } 384 385 /* --------------------------------------------------------------------- */ 386 387 static int 388 chfs_unmount(struct mount *mp, int mntflags) 389 { 390 int flags = 0, i = 0; 391 struct ufsmount *ump; 392 struct chfs_mount *chmp; 393 394 if (mntflags & MNT_FORCE) 395 flags |= FORCECLOSE; 396 397 dbg("[START]\n"); 398 399 ump = VFSTOUFS(mp); 400 chmp = ump->um_chfs; 401 402 /* Stop GC. */ 403 chfs_gc_thread_stop(chmp); 404 405 /* Flush everyt buffer. */ 406 (void)vflush(mp, NULLVP, flags); 407 408 if (chmp->chm_wbuf_len) { 409 mutex_enter(&chmp->chm_lock_mountfields); 410 chfs_flush_pending_wbuf(chmp); 411 mutex_exit(&chmp->chm_lock_mountfields); 412 } 413 414 /* Free node references. */ 415 for (i = 0; i < chmp->chm_ebh->peb_nr; i++) { 416 chfs_free_node_refs(&chmp->chm_blocks[i]); 417 } 418 419 /* Destroy vnode cache hashtable. */ 420 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 421 422 /* Close eraseblock handler. */ 423 ebh_close(chmp->chm_ebh); 424 425 /* Destroy mutexes. */ 426 rw_destroy(&chmp->chm_lock_wbuf); 427 mutex_destroy(&chmp->chm_lock_vnocache); 428 mutex_destroy(&chmp->chm_lock_sizes); 429 mutex_destroy(&chmp->chm_lock_mountfields); 430 431 /* Unmount UFS. */ 432 if (ump->um_devvp->v_type != VBAD) { 433 spec_node_setmountedfs(ump->um_devvp, NULL); 434 } 435 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 436 (void)VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED); 437 vput(ump->um_devvp); 438 439 mutex_destroy(&ump->um_lock); 440 441 /* Everything done. */ 442 kmem_free(ump, sizeof(struct ufsmount)); 443 mp->mnt_data = NULL; 444 mp->mnt_flag &= ~MNT_LOCAL; 445 dbg("[END]\n"); 446 return (0); 447 } 448 449 /* --------------------------------------------------------------------- */ 450 451 static int 452 chfs_root(struct mount *mp, int lktype, struct vnode **vpp) 453 { 454 struct vnode *vp; 455 int error; 456 457 if ((error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, lktype, &vp)) != 0) 458 return error; 459 *vpp = vp; 460 return 0; 461 } 462 463 /* --------------------------------------------------------------------- */ 464 465 extern rb_tree_ops_t frag_rbtree_ops; 466 467 static int 468 chfs_loadvnode(struct mount *mp, struct vnode *vp, 469 const void *key, size_t key_len, const void **new_key) 470 { 471 struct chfs_mount *chmp; 472 struct chfs_inode *ip; 473 struct ufsmount *ump; 474 dev_t dev; 475 int error; 476 struct chfs_vnode_cache* chvc = NULL; 477 struct chfs_node_ref* nref = NULL; 478 struct buf *bp; 479 ino_t ino; 480 481 KASSERT(key_len == sizeof(ino)); 482 memcpy(&ino, key, key_len); 483 484 dbg("vget() | ino: %llu\n", (unsigned long long)ino); 485 486 ump = VFSTOUFS(mp); 487 dev = ump->um_dev; 488 489 ip = pool_get(&chfs_inode_pool, PR_WAITOK); 490 491 /* Initialize vnode/inode. */ 492 memset(ip, 0, sizeof(*ip)); 493 ip->vp = vp; 494 ip->ump = ump; 495 ip->chmp = chmp = ump->um_chfs; 496 ip->dev = dev; 497 ip->ino = ino; 498 499 rb_tree_init(&ip->fragtree, &frag_rbtree_ops); 500 501 vp->v_tag = VT_CHFS; 502 vp->v_op = chfs_vnodeop_p; 503 if (ino == CHFS_ROOTINO) 504 vp->v_vflag |= VV_ROOT; 505 vp->v_data = ip; 506 507 /* Set root inode. */ 508 if (ino == CHFS_ROOTINO) { 509 dbg("SETROOT\n"); 510 vp->v_type = VDIR; 511 ip->ch_type = CHT_DIR; 512 ip->mode = IFMT | IEXEC | IWRITE | IREAD; 513 ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE); 514 chfs_update(vp, NULL, NULL, UPDATE_WAIT); 515 TAILQ_INIT(&ip->dents); 516 chfs_set_vnode_size(vp, 512); 517 } 518 519 mutex_enter(&chmp->chm_lock_vnocache); 520 chvc = chfs_vnode_cache_get(chmp, ino); 521 mutex_exit(&chmp->chm_lock_vnocache); 522 if (!chvc) { 523 dbg("!chvc\n"); 524 /* Initialize the corresponding vnode cache. */ 525 /* XXX, we cant alloc under a lock, refactor this! */ 526 chvc = chfs_vnode_cache_alloc(ino); 527 mutex_enter(&chmp->chm_lock_vnocache); 528 if (ino == CHFS_ROOTINO) { 529 chvc->nlink = 2; 530 chvc->pvno = CHFS_ROOTINO; 531 chvc->state = VNO_STATE_CHECKEDABSENT; 532 } 533 chfs_vnode_cache_add(chmp, chvc); 534 mutex_exit(&chmp->chm_lock_vnocache); 535 536 ip->chvc = chvc; 537 TAILQ_INIT(&ip->dents); 538 } else { 539 dbg("chvc\n"); 540 ip->chvc = chvc; 541 /* We had a vnode cache, the node is already on flash, so read it */ 542 if (ino == CHFS_ROOTINO) { 543 chvc->pvno = CHFS_ROOTINO; 544 TAILQ_INIT(&chvc->scan_dirents); 545 } else { 546 chfs_readvnode(mp, ino, &vp); 547 } 548 549 mutex_enter(&chmp->chm_lock_mountfields); 550 /* Initialize type specific things. */ 551 error = 0; 552 switch (ip->ch_type) { 553 case CHT_DIR: 554 /* Read every dirent. */ 555 nref = chvc->dirents; 556 while (nref && 557 (struct chfs_vnode_cache *)nref != chvc) { 558 chfs_readdirent(mp, nref, ip); 559 nref = nref->nref_next; 560 } 561 chfs_set_vnode_size(vp, 512); 562 break; 563 case CHT_REG: 564 /* FALLTHROUGH */ 565 case CHT_SOCK: 566 /* Collect data. */ 567 dbg("read_inode_internal | ino: %llu\n", 568 (unsigned long long)ip->ino); 569 error = chfs_read_inode(chmp, ip); 570 break; 571 case CHT_LNK: 572 /* Collect data. */ 573 dbg("read_inode_internal | ino: %llu\n", 574 (unsigned long long)ip->ino); 575 error = chfs_read_inode_internal(chmp, ip); 576 if (error) 577 break; 578 579 /* Set link. */ 580 dbg("size: %llu\n", (unsigned long long)ip->size); 581 bp = getiobuf(vp, true); 582 bp->b_blkno = 0; 583 bp->b_bufsize = bp->b_resid = 584 bp->b_bcount = ip->size; 585 bp->b_data = kmem_alloc(ip->size, KM_SLEEP); 586 chfs_read_data(chmp, vp, bp); 587 if (!ip->target) 588 ip->target = kmem_alloc(ip->size, 589 KM_SLEEP); 590 memcpy(ip->target, bp->b_data, ip->size); 591 kmem_free(bp->b_data, ip->size); 592 putiobuf(bp); 593 594 break; 595 case CHT_CHR: 596 /* FALLTHROUGH */ 597 case CHT_BLK: 598 /* FALLTHROUGH */ 599 case CHT_FIFO: 600 /* Collect data. */ 601 dbg("read_inode_internal | ino: %llu\n", 602 (unsigned long long)ip->ino); 603 error = chfs_read_inode_internal(chmp, ip); 604 if (error) 605 break; 606 607 /* Set device. */ 608 bp = getiobuf(vp, true); 609 bp->b_blkno = 0; 610 bp->b_bufsize = bp->b_resid = 611 bp->b_bcount = sizeof(dev_t); 612 bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP); 613 chfs_read_data(chmp, vp, bp); 614 memcpy(&ip->rdev, 615 bp->b_data, sizeof(dev_t)); 616 kmem_free(bp->b_data, sizeof(dev_t)); 617 putiobuf(bp); 618 /* Set specific operations. */ 619 if (ip->ch_type == CHT_FIFO) { 620 vp->v_op = chfs_fifoop_p; 621 } else { 622 vp->v_op = chfs_specop_p; 623 spec_node_init(vp, ip->rdev); 624 } 625 626 break; 627 case CHT_BLANK: 628 /* FALLTHROUGH */ 629 case CHT_BAD: 630 break; 631 } 632 mutex_exit(&chmp->chm_lock_mountfields); 633 if (error) { 634 vp->v_data = NULL; 635 KASSERT(TAILQ_FIRST(&ip->dents) == NULL); 636 pool_put(&chfs_inode_pool, ip); 637 return error; 638 } 639 640 } 641 642 /* Finish inode initialization. */ 643 ip->ch_type = VTTOCHT(vp->v_type); 644 ip->devvp = ump->um_devvp; 645 vref(ip->devvp); 646 647 genfs_node_init(vp, &chfs_genfsops); 648 uvm_vnp_setsize(vp, ip->size); 649 650 *new_key = &ip->ino; 651 652 return 0; 653 } 654 655 /* --------------------------------------------------------------------- */ 656 657 static int 658 chfs_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 659 { 660 int error; 661 662 error = vcache_get(mp, &ino, sizeof(ino), vpp); 663 if (error) 664 return error; 665 666 error = vn_lock(*vpp, lktype); 667 if (error) { 668 vrele(*vpp); 669 *vpp = NULL; 670 return error; 671 } 672 673 return 0; 674 } 675 676 /* --------------------------------------------------------------------- */ 677 678 679 static int 680 chfs_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 681 { 682 return ENODEV; 683 } 684 685 /* --------------------------------------------------------------------- */ 686 687 static int 688 chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 689 { 690 return ENODEV; 691 } 692 693 /* --------------------------------------------------------------------- */ 694 695 static int 696 chfs_start(struct mount *mp, int flags) 697 { 698 return 0; 699 } 700 701 /* --------------------------------------------------------------------- */ 702 703 static int 704 chfs_statvfs(struct mount *mp, struct statvfs *sbp) 705 { 706 struct chfs_mount *chmp; 707 struct ufsmount *ump; 708 dbg("statvfs\n"); 709 710 ump = VFSTOUFS(mp); 711 chmp = ump->um_chfs; 712 713 sbp->f_flag = mp->mnt_flag; 714 sbp->f_bsize = chmp->chm_ebh->eb_size; 715 sbp->f_frsize = chmp->chm_ebh->eb_size; 716 sbp->f_iosize = chmp->chm_ebh->eb_size; 717 718 sbp->f_blocks = chmp->chm_ebh->peb_nr; 719 sbp->f_files = 0; 720 sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write; 721 722 sbp->f_bfree = chmp->chm_nr_free_blocks; 723 sbp->f_bresvd = chmp->chm_resv_blocks_write; 724 725 /* FFS specific */ 726 sbp->f_ffree = 0; 727 sbp->f_favail = 0; 728 sbp->f_fresvd = 0; 729 730 copy_statvfs_info(sbp, mp); 731 732 return 0; 733 } 734 735 /* --------------------------------------------------------------------- */ 736 737 static int 738 chfs_sync(struct mount *mp, int waitfor, 739 kauth_cred_t uc) 740 { 741 return 0; 742 } 743 744 /* --------------------------------------------------------------------- */ 745 746 static void 747 chfs_init(void) 748 { 749 /* Initialize pools and inode hash. */ 750 chfs_alloc_pool_caches(); 751 pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0, 752 "chfsinopl", &pool_allocator_nointr, IPL_NONE); 753 ufs_init(); 754 } 755 756 /* --------------------------------------------------------------------- */ 757 758 static void 759 chfs_reinit(void) 760 { 761 ufs_reinit(); 762 } 763 764 /* --------------------------------------------------------------------- */ 765 766 static void 767 chfs_done(void) 768 { 769 ufs_done(); 770 pool_destroy(&chfs_inode_pool); 771 chfs_destroy_pool_caches(); 772 } 773 774 /* --------------------------------------------------------------------- */ 775 776 static int 777 chfs_snapshot(struct mount *mp, struct vnode *vp, 778 struct timespec *ctime) 779 { 780 return ENODEV; 781 } 782 783 /* --------------------------------------------------------------------- */ 784 785 /* 786 * chfs vfs operations. 787 */ 788 789 extern const struct vnodeopv_desc chfs_fifoop_opv_desc; 790 extern const struct vnodeopv_desc chfs_specop_opv_desc; 791 extern const struct vnodeopv_desc chfs_vnodeop_opv_desc; 792 793 const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = { 794 &chfs_fifoop_opv_desc, 795 &chfs_specop_opv_desc, 796 &chfs_vnodeop_opv_desc, 797 NULL, 798 }; 799 800 struct vfsops chfs_vfsops = { 801 .vfs_name = MOUNT_CHFS, 802 .vfs_min_mount_data = sizeof (struct chfs_args), 803 .vfs_mount = chfs_mount, 804 .vfs_start = chfs_start, 805 .vfs_unmount = chfs_unmount, 806 .vfs_root = chfs_root, 807 .vfs_quotactl = ufs_quotactl, 808 .vfs_statvfs = chfs_statvfs, 809 .vfs_sync = chfs_sync, 810 .vfs_vget = chfs_vget, 811 .vfs_loadvnode = chfs_loadvnode, 812 .vfs_fhtovp = chfs_fhtovp, 813 .vfs_vptofh = chfs_vptofh, 814 .vfs_init = chfs_init, 815 .vfs_reinit = chfs_reinit, 816 .vfs_done = chfs_done, 817 .vfs_snapshot = chfs_snapshot, 818 .vfs_extattrctl = vfs_stdextattrctl, 819 .vfs_suspendctl = genfs_suspendctl, 820 .vfs_renamelock_enter = genfs_renamelock_enter, 821 .vfs_renamelock_exit = genfs_renamelock_exit, 822 .vfs_fsync = (void *)eopnotsupp, 823 .vfs_opv_descs = chfs_vnodeopv_descs 824 }; 825 826 /* For using CHFS as a module. */ 827 828 MODULE(MODULE_CLASS_VFS, chfs, "ufs,flash"); 829 830 static int 831 chfs_modcmd(modcmd_t cmd, void *arg) 832 { 833 switch (cmd) { 834 case MODULE_CMD_INIT: 835 return vfs_attach(&chfs_vfsops); 836 case MODULE_CMD_FINI: 837 return vfs_detach(&chfs_vfsops); 838 default: 839 return ENOTTY; 840 } 841 } 842
Indexes created Mon Sep 22 13:09:51 GMT 2025