chfs_vfsops.c revision 1.20.2.1
1 /* $NetBSD: chfs_vfsops.c,v 1.20.2.1 2020/01/17 21:47:37 ad 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 /* --------------------------------------------------------------------- */ 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 contants. (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 vp->v_vflag |= VV_LOCKSWORK; 504 if (ino == CHFS_ROOTINO) 505 vp->v_vflag |= VV_ROOT; 506 vp->v_data = ip; 507 508 /* Set root inode. */ 509 if (ino == CHFS_ROOTINO) { 510 dbg("SETROOT\n"); 511 vp->v_type = VDIR; 512 ip->ch_type = CHT_DIR; 513 ip->mode = IFMT | IEXEC | IWRITE | IREAD; 514 ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE); 515 chfs_update(vp, NULL, NULL, UPDATE_WAIT); 516 TAILQ_INIT(&ip->dents); 517 chfs_set_vnode_size(vp, 512); 518 } 519 520 mutex_enter(&chmp->chm_lock_vnocache); 521 chvc = chfs_vnode_cache_get(chmp, ino); 522 mutex_exit(&chmp->chm_lock_vnocache); 523 if (!chvc) { 524 dbg("!chvc\n"); 525 /* Initialize the corresponding vnode cache. */ 526 /* XXX, we cant alloc under a lock, refactor this! */ 527 chvc = chfs_vnode_cache_alloc(ino); 528 mutex_enter(&chmp->chm_lock_vnocache); 529 if (ino == CHFS_ROOTINO) { 530 chvc->nlink = 2; 531 chvc->pvno = CHFS_ROOTINO; 532 chvc->state = VNO_STATE_CHECKEDABSENT; 533 } 534 chfs_vnode_cache_add(chmp, chvc); 535 mutex_exit(&chmp->chm_lock_vnocache); 536 537 ip->chvc = chvc; 538 TAILQ_INIT(&ip->dents); 539 } else { 540 dbg("chvc\n"); 541 ip->chvc = chvc; 542 /* We had a vnode cache, the node is already on flash, so read it */ 543 if (ino == CHFS_ROOTINO) { 544 chvc->pvno = CHFS_ROOTINO; 545 TAILQ_INIT(&chvc->scan_dirents); 546 } else { 547 chfs_readvnode(mp, ino, &vp); 548 } 549 550 mutex_enter(&chmp->chm_lock_mountfields); 551 /* Initialize type specific things. */ 552 error = 0; 553 switch (ip->ch_type) { 554 case CHT_DIR: 555 /* Read every dirent. */ 556 nref = chvc->dirents; 557 while (nref && 558 (struct chfs_vnode_cache *)nref != chvc) { 559 chfs_readdirent(mp, nref, ip); 560 nref = nref->nref_next; 561 } 562 chfs_set_vnode_size(vp, 512); 563 break; 564 case CHT_REG: 565 /* FALLTHROUGH */ 566 case CHT_SOCK: 567 /* Collect data. */ 568 dbg("read_inode_internal | ino: %llu\n", 569 (unsigned long long)ip->ino); 570 error = chfs_read_inode(chmp, ip); 571 break; 572 case CHT_LNK: 573 /* Collect data. */ 574 dbg("read_inode_internal | ino: %llu\n", 575 (unsigned long long)ip->ino); 576 error = chfs_read_inode_internal(chmp, ip); 577 if (error) 578 break; 579 580 /* Set link. */ 581 dbg("size: %llu\n", (unsigned long long)ip->size); 582 bp = getiobuf(vp, true); 583 bp->b_blkno = 0; 584 bp->b_bufsize = bp->b_resid = 585 bp->b_bcount = ip->size; 586 bp->b_data = kmem_alloc(ip->size, KM_SLEEP); 587 chfs_read_data(chmp, vp, bp); 588 if (!ip->target) 589 ip->target = kmem_alloc(ip->size, 590 KM_SLEEP); 591 memcpy(ip->target, bp->b_data, ip->size); 592 kmem_free(bp->b_data, ip->size); 593 putiobuf(bp); 594 595 break; 596 case CHT_CHR: 597 /* FALLTHROUGH */ 598 case CHT_BLK: 599 /* FALLTHROUGH */ 600 case CHT_FIFO: 601 /* Collect data. */ 602 dbg("read_inode_internal | ino: %llu\n", 603 (unsigned long long)ip->ino); 604 error = chfs_read_inode_internal(chmp, ip); 605 if (error) 606 break; 607 608 /* Set device. */ 609 bp = getiobuf(vp, true); 610 bp->b_blkno = 0; 611 bp->b_bufsize = bp->b_resid = 612 bp->b_bcount = sizeof(dev_t); 613 bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP); 614 chfs_read_data(chmp, vp, bp); 615 memcpy(&ip->rdev, 616 bp->b_data, sizeof(dev_t)); 617 kmem_free(bp->b_data, sizeof(dev_t)); 618 putiobuf(bp); 619 /* Set specific operations. */ 620 if (ip->ch_type == CHT_FIFO) { 621 vp->v_op = chfs_fifoop_p; 622 } else { 623 vp->v_op = chfs_specop_p; 624 spec_node_init(vp, ip->rdev); 625 } 626 627 break; 628 case CHT_BLANK: 629 /* FALLTHROUGH */ 630 case CHT_BAD: 631 break; 632 } 633 mutex_exit(&chmp->chm_lock_mountfields); 634 if (error) { 635 vp->v_data = NULL; 636 KASSERT(TAILQ_FIRST(&ip->dents) == NULL); 637 pool_put(&chfs_inode_pool, ip); 638 return error; 639 } 640 641 } 642 643 /* Finish inode initialization. */ 644 ip->ch_type = VTTOCHT(vp->v_type); 645 ip->devvp = ump->um_devvp; 646 vref(ip->devvp); 647 648 genfs_node_init(vp, &chfs_genfsops); 649 uvm_vnp_setsize(vp, ip->size); 650 651 *new_key = &ip->ino; 652 653 return 0; 654 } 655 656 /* --------------------------------------------------------------------- */ 657 658 static int 659 chfs_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 660 { 661 int error; 662 663 error = vcache_get(mp, &ino, sizeof(ino), vpp); 664 if (error) 665 return error; 666 667 error = vn_lock(*vpp, lktype); 668 if (error) { 669 vrele(*vpp); 670 *vpp = NULL; 671 return error; 672 } 673 674 return 0; 675 } 676 677 /* --------------------------------------------------------------------- */ 678 679 680 static int 681 chfs_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 682 { 683 return ENODEV; 684 } 685 686 /* --------------------------------------------------------------------- */ 687 688 static int 689 chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 690 { 691 return ENODEV; 692 } 693 694 /* --------------------------------------------------------------------- */ 695 696 static int 697 chfs_start(struct mount *mp, int flags) 698 { 699 return 0; 700 } 701 702 /* --------------------------------------------------------------------- */ 703 704 static int 705 chfs_statvfs(struct mount *mp, struct statvfs *sbp) 706 { 707 struct chfs_mount *chmp; 708 struct ufsmount *ump; 709 dbg("statvfs\n"); 710 711 ump = VFSTOUFS(mp); 712 chmp = ump->um_chfs; 713 714 sbp->f_flag = mp->mnt_flag; 715 sbp->f_bsize = chmp->chm_ebh->eb_size; 716 sbp->f_frsize = chmp->chm_ebh->eb_size; 717 sbp->f_iosize = chmp->chm_ebh->eb_size; 718 719 sbp->f_blocks = chmp->chm_ebh->peb_nr; 720 sbp->f_files = 0; 721 sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write; 722 723 sbp->f_bfree = chmp->chm_nr_free_blocks; 724 sbp->f_bresvd = chmp->chm_resv_blocks_write; 725 726 /* FFS specific */ 727 sbp->f_ffree = 0; 728 sbp->f_favail = 0; 729 sbp->f_fresvd = 0; 730 731 copy_statvfs_info(sbp, mp); 732 733 return 0; 734 } 735 736 /* --------------------------------------------------------------------- */ 737 738 static int 739 chfs_sync(struct mount *mp, int waitfor, 740 kauth_cred_t uc) 741 { 742 return 0; 743 } 744 745 /* --------------------------------------------------------------------- */ 746 747 static void 748 chfs_init(void) 749 { 750 /* Initialize pools and inode hash. */ 751 chfs_alloc_pool_caches(); 752 pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0, 753 "chfsinopl", &pool_allocator_nointr, IPL_NONE); 754 ufs_init(); 755 } 756 757 /* --------------------------------------------------------------------- */ 758 759 static void 760 chfs_reinit(void) 761 { 762 ufs_reinit(); 763 } 764 765 /* --------------------------------------------------------------------- */ 766 767 static void 768 chfs_done(void) 769 { 770 ufs_done(); 771 pool_destroy(&chfs_inode_pool); 772 chfs_destroy_pool_caches(); 773 } 774 775 /* --------------------------------------------------------------------- */ 776 777 static int 778 chfs_snapshot(struct mount *mp, struct vnode *vp, 779 struct timespec *ctime) 780 { 781 return ENODEV; 782 } 783 784 /* --------------------------------------------------------------------- */ 785 786 /* 787 * chfs vfs operations. 788 */ 789 790 extern const struct vnodeopv_desc chfs_fifoop_opv_desc; 791 extern const struct vnodeopv_desc chfs_specop_opv_desc; 792 extern const struct vnodeopv_desc chfs_vnodeop_opv_desc; 793 794 const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = { 795 &chfs_fifoop_opv_desc, 796 &chfs_specop_opv_desc, 797 &chfs_vnodeop_opv_desc, 798 NULL, 799 }; 800 801 struct vfsops chfs_vfsops = { 802 .vfs_name = MOUNT_CHFS, 803 .vfs_min_mount_data = sizeof (struct chfs_args), 804 .vfs_mount = chfs_mount, 805 .vfs_start = chfs_start, 806 .vfs_unmount = chfs_unmount, 807 .vfs_root = chfs_root, 808 .vfs_quotactl = ufs_quotactl, 809 .vfs_statvfs = chfs_statvfs, 810 .vfs_sync = chfs_sync, 811 .vfs_vget = chfs_vget, 812 .vfs_loadvnode = chfs_loadvnode, 813 .vfs_fhtovp = chfs_fhtovp, 814 .vfs_vptofh = chfs_vptofh, 815 .vfs_init = chfs_init, 816 .vfs_reinit = chfs_reinit, 817 .vfs_done = chfs_done, 818 .vfs_snapshot = chfs_snapshot, 819 .vfs_extattrctl = vfs_stdextattrctl, 820 .vfs_suspendctl = genfs_suspendctl, 821 .vfs_renamelock_enter = genfs_renamelock_enter, 822 .vfs_renamelock_exit = genfs_renamelock_exit, 823 .vfs_fsync = (void *)eopnotsupp, 824 .vfs_opv_descs = chfs_vnodeopv_descs 825 }; 826 827 /* For using CHFS as a module. */ 828 829 MODULE(MODULE_CLASS_VFS, chfs, "ufs,flash"); 830 831 static int 832 chfs_modcmd(modcmd_t cmd, void *arg) 833 { 834 switch (cmd) { 835 case MODULE_CMD_INIT: 836 return vfs_attach(&chfs_vfsops); 837 case MODULE_CMD_FINI: 838 return vfs_detach(&chfs_vfsops); 839 default: 840 return ENOTTY; 841 } 842 } 843
Indexes created Thu Oct 23 22:10:10 GMT 2025