chfs_vfsops.c revision 1.18.2.1
1 /* $NetBSD: chfs_vfsops.c,v 1.18.2.1 2020/04/08 14:09:03 martin 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 *, int, 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, int, struct vnode **); 76 static int chfs_fhtovp(struct mount *, struct fid *, int, 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 .gop_putrange = genfs_gop_putrange, 103 }; 104 105 struct pool chfs_inode_pool; 106 107 /* for looking up the major for flash */ 108 extern const struct cdevsw flash_cdevsw; 109 110 /* --------------------------------------------------------------------- */ 111 112 static int 113 chfs_mount(struct mount *mp, 114 const char *path, void *data, size_t *data_len) 115 { 116 struct lwp *l = curlwp; 117 struct nameidata nd; 118 struct pathbuf *pb; 119 struct vnode *devvp = NULL; 120 struct ufs_args *args = data; 121 struct ufsmount *ump = NULL; 122 struct chfs_mount *chmp; 123 int err = 0; 124 int xflags; 125 126 dbg("mount()\n"); 127 128 if (args == NULL) 129 return EINVAL; 130 if (*data_len < sizeof *args) 131 return EINVAL; 132 133 if (mp->mnt_flag & MNT_GETARGS) { 134 ump = VFSTOUFS(mp); 135 if (ump == NULL) 136 return EIO; 137 memset(args, 0, sizeof *args); 138 args->fspec = NULL; 139 *data_len = sizeof *args; 140 return 0; 141 } 142 143 if (mp->mnt_flag & MNT_UPDATE) { 144 /* XXX: There is no support yet to update file system 145 * settings. Should be added. */ 146 147 return ENODEV; 148 } 149 150 if (args->fspec != NULL) { 151 err = pathbuf_copyin(args->fspec, &pb); 152 if (err) { 153 return err; 154 } 155 /* Look up the name and verify that it's sane. */ 156 NDINIT(&nd, LOOKUP, FOLLOW, pb); 157 err = namei(&nd); 158 pathbuf_destroy(pb); 159 if (err) 160 return err; 161 devvp = nd.ni_vp; 162 163 /* Be sure this is a valid block device */ 164 if (devvp->v_type != VBLK) 165 err = ENOTBLK; 166 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 167 err = ENXIO; 168 } 169 170 if (err) { 171 vrele(devvp); 172 return (err); 173 } 174 175 if (mp->mnt_flag & MNT_RDONLY) 176 xflags = FREAD; 177 else 178 xflags = FREAD|FWRITE; 179 180 err = VOP_OPEN(devvp, xflags, FSCRED); 181 if (err) 182 goto fail; 183 184 /* call CHFS mount function */ 185 err = chfs_mountfs(devvp, mp); 186 if (err) { 187 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 188 (void)VOP_CLOSE(devvp, xflags, NOCRED); 189 VOP_UNLOCK(devvp); 190 goto fail; 191 } 192 193 ump = VFSTOUFS(mp); 194 chmp = ump->um_chfs; 195 196 vfs_getnewfsid(mp); 197 chmp->chm_fsmp = mp; 198 199 return set_statvfs_info(path, 200 UIO_USERSPACE, args->fspec, 201 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 202 203 fail: 204 vrele(devvp); 205 return (err); 206 } 207 208 /* chfs_mountfs - init CHFS */ 209 int 210 chfs_mountfs(struct vnode *devvp, struct mount *mp) 211 { 212 struct lwp *l = curlwp; 213 kauth_cred_t cred; 214 devmajor_t flash_major; 215 dev_t dev; 216 struct ufsmount* ump = NULL; 217 struct chfs_mount* chmp; 218 struct vnode *vp; 219 int err = 0; 220 221 dbg("mountfs()\n"); 222 223 dev = devvp->v_rdev; 224 cred = l ? l->l_cred : NOCRED; 225 226 /* Flush out any old buffers remaining from a previous use. */ 227 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 228 err = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 229 VOP_UNLOCK(devvp); 230 if (err) 231 goto fail0; 232 233 /* Setup device. */ 234 flash_major = cdevsw_lookup_major(&flash_cdevsw); 235 236 if (devvp->v_type != VBLK) 237 err = ENOTBLK; 238 else if (bdevsw_lookup(dev) == NULL) 239 err = ENXIO; 240 else if (major(dev) != flash_major) { 241 dbg("major(dev): %d, flash_major: %d\n", 242 major(dev), flash_major); 243 err = ENODEV; 244 } 245 if (err) 246 goto fail0; 247 248 /* Connect CHFS to UFS. */ 249 ump = kmem_zalloc(sizeof(struct ufsmount), KM_SLEEP); 250 251 ump->um_fstype = UFS1; 252 ump->um_chfs = kmem_zalloc(sizeof(struct chfs_mount), KM_SLEEP); 253 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 254 255 chmp = ump->um_chfs; 256 257 /* Initialize erase block handler. */ 258 chmp->chm_ebh = kmem_alloc(sizeof(struct chfs_ebh), KM_SLEEP); 259 260 dbg("[]opening flash: %u\n", (unsigned int)devvp->v_rdev); 261 err = ebh_open(chmp->chm_ebh, devvp->v_rdev); 262 if (err) { 263 dbg("error while opening flash\n"); 264 goto fail1; 265 } 266 267 //TODO check flash sizes 268 269 /* Initialize vnode cache's hashtable and eraseblock array. */ 270 chmp->chm_gbl_version = 0; 271 chmp->chm_vnocache_hash = chfs_vnocache_hash_init(); 272 273 chmp->chm_blocks = kmem_zalloc(chmp->chm_ebh->peb_nr * 274 sizeof(struct chfs_eraseblock), KM_SLEEP); 275 276 /* Initialize mutexes. */ 277 mutex_init(&chmp->chm_lock_mountfields, MUTEX_DEFAULT, IPL_NONE); 278 mutex_init(&chmp->chm_lock_sizes, MUTEX_DEFAULT, IPL_NONE); 279 mutex_init(&chmp->chm_lock_vnocache, MUTEX_DEFAULT, IPL_NONE); 280 281 /* Initialize read/write contants. (from UFS) */ 282 chmp->chm_fs_bmask = -4096; 283 chmp->chm_fs_bsize = 4096; 284 chmp->chm_fs_qbmask = 4095; 285 chmp->chm_fs_bshift = 12; 286 chmp->chm_fs_fmask = -2048; 287 chmp->chm_fs_qfmask = 2047; 288 289 /* Initialize writebuffer. */ 290 chmp->chm_wbuf_pagesize = chmp->chm_ebh->flash_if->page_size; 291 dbg("wbuf size: %zu\n", chmp->chm_wbuf_pagesize); 292 chmp->chm_wbuf = kmem_alloc(chmp->chm_wbuf_pagesize, KM_SLEEP); 293 rw_init(&chmp->chm_lock_wbuf); 294 295 /* Initialize queues. */ 296 TAILQ_INIT(&chmp->chm_free_queue); 297 TAILQ_INIT(&chmp->chm_clean_queue); 298 TAILQ_INIT(&chmp->chm_dirty_queue); 299 TAILQ_INIT(&chmp->chm_very_dirty_queue); 300 TAILQ_INIT(&chmp->chm_erasable_pending_wbuf_queue); 301 TAILQ_INIT(&chmp->chm_erase_pending_queue); 302 303 /* Initialize flash-specific constants. */ 304 chfs_calc_trigger_levels(chmp); 305 306 /* Initialize sizes. */ 307 chmp->chm_nr_free_blocks = 0; 308 chmp->chm_nr_erasable_blocks = 0; 309 chmp->chm_max_vno = 2; 310 chmp->chm_checked_vno = 2; 311 chmp->chm_unchecked_size = 0; 312 chmp->chm_used_size = 0; 313 chmp->chm_dirty_size = 0; 314 chmp->chm_wasted_size = 0; 315 chmp->chm_free_size = chmp->chm_ebh->eb_size * chmp->chm_ebh->peb_nr; 316 317 /* Build filesystem. */ 318 err = chfs_build_filesystem(chmp); 319 320 if (err) { 321 /* Armageddon and return. */ 322 err = EIO; 323 goto fail2; 324 } 325 326 /* Initialize UFS. */ 327 mp->mnt_data = ump; 328 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 329 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CHFS); 330 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 331 mp->mnt_stat.f_namemax = MAXNAMLEN; 332 mp->mnt_flag |= MNT_LOCAL; 333 mp->mnt_fs_bshift = PAGE_SHIFT; 334 mp->mnt_dev_bshift = DEV_BSHIFT; 335 mp->mnt_iflag |= IMNT_MPSAFE; 336 ump->um_flags = 0; 337 ump->um_mountp = mp; 338 ump->um_dev = dev; 339 ump->um_devvp = devvp; 340 ump->um_maxfilesize = 1048512 * 1024; 341 342 /* Allocate the root vnode. */ 343 err = VFS_VGET(mp, CHFS_ROOTINO, LK_EXCLUSIVE, &vp); 344 if (err) { 345 dbg("error: %d while allocating root node\n", err); 346 return err; 347 } 348 vput(vp); 349 350 /* Start GC. */ 351 chfs_gc_thread_start(chmp); 352 mutex_enter(&chmp->chm_lock_mountfields); 353 chfs_gc_trigger(chmp); 354 mutex_exit(&chmp->chm_lock_mountfields); 355 356 spec_node_setmountedfs(devvp, mp); 357 return 0; 358 359 fail2: 360 KASSERT(TAILQ_EMPTY(&chmp->chm_erase_pending_queue)); 361 KASSERT(TAILQ_EMPTY(&chmp->chm_erasable_pending_wbuf_queue)); 362 KASSERT(TAILQ_EMPTY(&chmp->chm_very_dirty_queue)); 363 KASSERT(TAILQ_EMPTY(&chmp->chm_dirty_queue)); 364 KASSERT(TAILQ_EMPTY(&chmp->chm_clean_queue)); 365 KASSERT(TAILQ_EMPTY(&chmp->chm_free_queue)); 366 rw_destroy(&chmp->chm_lock_wbuf); 367 kmem_free(chmp->chm_wbuf, chmp->chm_wbuf_pagesize); 368 mutex_destroy(&chmp->chm_lock_vnocache); 369 mutex_destroy(&chmp->chm_lock_sizes); 370 mutex_destroy(&chmp->chm_lock_mountfields); 371 kmem_free(chmp->chm_blocks, chmp->chm_ebh->peb_nr * 372 sizeof(struct chfs_eraseblock)); 373 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 374 ebh_close(chmp->chm_ebh); 375 376 fail1: 377 kmem_free(chmp->chm_ebh, sizeof(struct chfs_ebh)); 378 mutex_destroy(&ump->um_lock); 379 kmem_free(chmp, sizeof(struct chfs_mount)); 380 kmem_free(ump, sizeof(struct ufsmount)); 381 382 fail0: 383 KASSERT(err); 384 return err; 385 } 386 387 /* --------------------------------------------------------------------- */ 388 389 static int 390 chfs_unmount(struct mount *mp, int mntflags) 391 { 392 int flags = 0, i = 0; 393 struct ufsmount *ump; 394 struct chfs_mount *chmp; 395 396 if (mntflags & MNT_FORCE) 397 flags |= FORCECLOSE; 398 399 dbg("[START]\n"); 400 401 ump = VFSTOUFS(mp); 402 chmp = ump->um_chfs; 403 404 /* Stop GC. */ 405 chfs_gc_thread_stop(chmp); 406 407 /* Flush everyt buffer. */ 408 (void)vflush(mp, NULLVP, flags); 409 410 if (chmp->chm_wbuf_len) { 411 mutex_enter(&chmp->chm_lock_mountfields); 412 chfs_flush_pending_wbuf(chmp); 413 mutex_exit(&chmp->chm_lock_mountfields); 414 } 415 416 /* Free node references. */ 417 for (i = 0; i < chmp->chm_ebh->peb_nr; i++) { 418 chfs_free_node_refs(&chmp->chm_blocks[i]); 419 } 420 421 /* Destroy vnode cache hashtable. */ 422 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 423 424 /* Close eraseblock handler. */ 425 ebh_close(chmp->chm_ebh); 426 427 /* Destroy mutexes. */ 428 rw_destroy(&chmp->chm_lock_wbuf); 429 mutex_destroy(&chmp->chm_lock_vnocache); 430 mutex_destroy(&chmp->chm_lock_sizes); 431 mutex_destroy(&chmp->chm_lock_mountfields); 432 433 /* Unmount UFS. */ 434 if (ump->um_devvp->v_type != VBAD) { 435 spec_node_setmountedfs(ump->um_devvp, NULL); 436 } 437 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 438 (void)VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED); 439 vput(ump->um_devvp); 440 441 mutex_destroy(&ump->um_lock); 442 443 /* Everything done. */ 444 kmem_free(ump, sizeof(struct ufsmount)); 445 mp->mnt_data = NULL; 446 mp->mnt_flag &= ~MNT_LOCAL; 447 dbg("[END]\n"); 448 return (0); 449 } 450 451 /* --------------------------------------------------------------------- */ 452 453 static int 454 chfs_root(struct mount *mp, int lktype, struct vnode **vpp) 455 { 456 struct vnode *vp; 457 int error; 458 459 if ((error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, lktype, &vp)) != 0) 460 return error; 461 *vpp = vp; 462 return 0; 463 } 464 465 /* --------------------------------------------------------------------- */ 466 467 extern rb_tree_ops_t frag_rbtree_ops; 468 469 static int 470 chfs_loadvnode(struct mount *mp, struct vnode *vp, 471 const void *key, size_t key_len, const void **new_key) 472 { 473 struct chfs_mount *chmp; 474 struct chfs_inode *ip; 475 struct ufsmount *ump; 476 dev_t dev; 477 int error; 478 struct chfs_vnode_cache* chvc = NULL; 479 struct chfs_node_ref* nref = NULL; 480 struct buf *bp; 481 ino_t ino; 482 483 KASSERT(key_len == sizeof(ino)); 484 memcpy(&ino, key, key_len); 485 486 dbg("vget() | ino: %llu\n", (unsigned long long)ino); 487 488 ump = VFSTOUFS(mp); 489 dev = ump->um_dev; 490 491 ip = pool_get(&chfs_inode_pool, PR_WAITOK); 492 493 /* Initialize vnode/inode. */ 494 memset(ip, 0, sizeof(*ip)); 495 ip->vp = vp; 496 ip->ump = ump; 497 ip->chmp = chmp = ump->um_chfs; 498 ip->dev = dev; 499 ip->ino = ino; 500 501 rb_tree_init(&ip->fragtree, &frag_rbtree_ops); 502 503 vp->v_tag = VT_CHFS; 504 vp->v_op = chfs_vnodeop_p; 505 vp->v_vflag |= VV_LOCKSWORK; 506 if (ino == CHFS_ROOTINO) 507 vp->v_vflag |= VV_ROOT; 508 vp->v_data = ip; 509 510 /* Set root inode. */ 511 if (ino == CHFS_ROOTINO) { 512 dbg("SETROOT\n"); 513 vp->v_type = VDIR; 514 ip->ch_type = CHT_DIR; 515 ip->mode = IFMT | IEXEC | IWRITE | IREAD; 516 ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE); 517 chfs_update(vp, NULL, NULL, UPDATE_WAIT); 518 TAILQ_INIT(&ip->dents); 519 chfs_set_vnode_size(vp, 512); 520 } 521 522 mutex_enter(&chmp->chm_lock_vnocache); 523 chvc = chfs_vnode_cache_get(chmp, ino); 524 mutex_exit(&chmp->chm_lock_vnocache); 525 if (!chvc) { 526 dbg("!chvc\n"); 527 /* Initialize the corresponding vnode cache. */ 528 /* XXX, we cant alloc under a lock, refactor this! */ 529 chvc = chfs_vnode_cache_alloc(ino); 530 mutex_enter(&chmp->chm_lock_vnocache); 531 if (ino == CHFS_ROOTINO) { 532 chvc->nlink = 2; 533 chvc->pvno = CHFS_ROOTINO; 534 chvc->state = VNO_STATE_CHECKEDABSENT; 535 } 536 chfs_vnode_cache_add(chmp, chvc); 537 mutex_exit(&chmp->chm_lock_vnocache); 538 539 ip->chvc = chvc; 540 TAILQ_INIT(&ip->dents); 541 } else { 542 dbg("chvc\n"); 543 ip->chvc = chvc; 544 /* We had a vnode cache, the node is already on flash, so read it */ 545 if (ino == CHFS_ROOTINO) { 546 chvc->pvno = CHFS_ROOTINO; 547 TAILQ_INIT(&chvc->scan_dirents); 548 } else { 549 chfs_readvnode(mp, ino, &vp); 550 } 551 552 mutex_enter(&chmp->chm_lock_mountfields); 553 /* Initialize type specific things. */ 554 error = 0; 555 switch (ip->ch_type) { 556 case CHT_DIR: 557 /* Read every dirent. */ 558 nref = chvc->dirents; 559 while (nref && 560 (struct chfs_vnode_cache *)nref != chvc) { 561 chfs_readdirent(mp, nref, ip); 562 nref = nref->nref_next; 563 } 564 chfs_set_vnode_size(vp, 512); 565 break; 566 case CHT_REG: 567 /* FALLTHROUGH */ 568 case CHT_SOCK: 569 /* Collect data. */ 570 dbg("read_inode_internal | ino: %llu\n", 571 (unsigned long long)ip->ino); 572 error = chfs_read_inode(chmp, ip); 573 break; 574 case CHT_LNK: 575 /* Collect data. */ 576 dbg("read_inode_internal | ino: %llu\n", 577 (unsigned long long)ip->ino); 578 error = chfs_read_inode_internal(chmp, ip); 579 if (error) 580 break; 581 582 /* Set link. */ 583 dbg("size: %llu\n", (unsigned long long)ip->size); 584 bp = getiobuf(vp, true); 585 bp->b_blkno = 0; 586 bp->b_bufsize = bp->b_resid = 587 bp->b_bcount = ip->size; 588 bp->b_data = kmem_alloc(ip->size, KM_SLEEP); 589 chfs_read_data(chmp, vp, bp); 590 if (!ip->target) 591 ip->target = kmem_alloc(ip->size, 592 KM_SLEEP); 593 memcpy(ip->target, bp->b_data, ip->size); 594 kmem_free(bp->b_data, ip->size); 595 putiobuf(bp); 596 597 break; 598 case CHT_CHR: 599 /* FALLTHROUGH */ 600 case CHT_BLK: 601 /* FALLTHROUGH */ 602 case CHT_FIFO: 603 /* Collect data. */ 604 dbg("read_inode_internal | ino: %llu\n", 605 (unsigned long long)ip->ino); 606 error = chfs_read_inode_internal(chmp, ip); 607 if (error) 608 break; 609 610 /* Set device. */ 611 bp = getiobuf(vp, true); 612 bp->b_blkno = 0; 613 bp->b_bufsize = bp->b_resid = 614 bp->b_bcount = sizeof(dev_t); 615 bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP); 616 chfs_read_data(chmp, vp, bp); 617 memcpy(&ip->rdev, 618 bp->b_data, sizeof(dev_t)); 619 kmem_free(bp->b_data, sizeof(dev_t)); 620 putiobuf(bp); 621 /* Set specific operations. */ 622 if (ip->ch_type == CHT_FIFO) { 623 vp->v_op = chfs_fifoop_p; 624 } else { 625 vp->v_op = chfs_specop_p; 626 spec_node_init(vp, ip->rdev); 627 } 628 629 break; 630 case CHT_BLANK: 631 /* FALLTHROUGH */ 632 case CHT_BAD: 633 break; 634 } 635 mutex_exit(&chmp->chm_lock_mountfields); 636 if (error) { 637 vp->v_data = NULL; 638 KASSERT(TAILQ_FIRST(&ip->dents) == NULL); 639 pool_put(&chfs_inode_pool, ip); 640 return error; 641 } 642 643 } 644 645 /* Finish inode initialization. */ 646 ip->ch_type = VTTOCHT(vp->v_type); 647 ip->devvp = ump->um_devvp; 648 vref(ip->devvp); 649 650 genfs_node_init(vp, &chfs_genfsops); 651 uvm_vnp_setsize(vp, ip->size); 652 653 *new_key = &ip->ino; 654 655 return 0; 656 } 657 658 /* --------------------------------------------------------------------- */ 659 660 static int 661 chfs_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 662 { 663 int error; 664 665 error = vcache_get(mp, &ino, sizeof(ino), vpp); 666 if (error) 667 return error; 668 669 error = vn_lock(*vpp, lktype); 670 if (error) { 671 vrele(*vpp); 672 *vpp = NULL; 673 return error; 674 } 675 676 return 0; 677 } 678 679 /* --------------------------------------------------------------------- */ 680 681 682 static int 683 chfs_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 684 { 685 return ENODEV; 686 } 687 688 /* --------------------------------------------------------------------- */ 689 690 static int 691 chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 692 { 693 return ENODEV; 694 } 695 696 /* --------------------------------------------------------------------- */ 697 698 static int 699 chfs_start(struct mount *mp, int flags) 700 { 701 return 0; 702 } 703 704 /* --------------------------------------------------------------------- */ 705 706 static int 707 chfs_statvfs(struct mount *mp, struct statvfs *sbp) 708 { 709 struct chfs_mount *chmp; 710 struct ufsmount *ump; 711 dbg("statvfs\n"); 712 713 ump = VFSTOUFS(mp); 714 chmp = ump->um_chfs; 715 716 sbp->f_flag = mp->mnt_flag; 717 sbp->f_bsize = chmp->chm_ebh->eb_size; 718 sbp->f_frsize = chmp->chm_ebh->eb_size; 719 sbp->f_iosize = chmp->chm_ebh->eb_size; 720 721 sbp->f_blocks = chmp->chm_ebh->peb_nr; 722 sbp->f_files = 0; 723 sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write; 724 725 sbp->f_bfree = chmp->chm_nr_free_blocks; 726 sbp->f_bresvd = chmp->chm_resv_blocks_write; 727 728 /* FFS specific */ 729 sbp->f_ffree = 0; 730 sbp->f_favail = 0; 731 sbp->f_fresvd = 0; 732 733 copy_statvfs_info(sbp, mp); 734 735 return 0; 736 } 737 738 /* --------------------------------------------------------------------- */ 739 740 static int 741 chfs_sync(struct mount *mp, int waitfor, 742 kauth_cred_t uc) 743 { 744 return 0; 745 } 746 747 /* --------------------------------------------------------------------- */ 748 749 static void 750 chfs_init(void) 751 { 752 /* Initialize pools and inode hash. */ 753 chfs_alloc_pool_caches(); 754 pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0, 755 "chfsinopl", &pool_allocator_nointr, IPL_NONE); 756 ufs_init(); 757 } 758 759 /* --------------------------------------------------------------------- */ 760 761 static void 762 chfs_reinit(void) 763 { 764 ufs_reinit(); 765 } 766 767 /* --------------------------------------------------------------------- */ 768 769 static void 770 chfs_done(void) 771 { 772 ufs_done(); 773 pool_destroy(&chfs_inode_pool); 774 chfs_destroy_pool_caches(); 775 } 776 777 /* --------------------------------------------------------------------- */ 778 779 static int 780 chfs_snapshot(struct mount *mp, struct vnode *vp, 781 struct timespec *ctime) 782 { 783 return ENODEV; 784 } 785 786 /* --------------------------------------------------------------------- */ 787 788 /* 789 * chfs vfs operations. 790 */ 791 792 extern const struct vnodeopv_desc chfs_fifoop_opv_desc; 793 extern const struct vnodeopv_desc chfs_specop_opv_desc; 794 extern const struct vnodeopv_desc chfs_vnodeop_opv_desc; 795 796 const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = { 797 &chfs_fifoop_opv_desc, 798 &chfs_specop_opv_desc, 799 &chfs_vnodeop_opv_desc, 800 NULL, 801 }; 802 803 struct vfsops chfs_vfsops = { 804 .vfs_name = MOUNT_CHFS, 805 .vfs_min_mount_data = sizeof (struct chfs_args), 806 .vfs_mount = chfs_mount, 807 .vfs_start = chfs_start, 808 .vfs_unmount = chfs_unmount, 809 .vfs_root = chfs_root, 810 .vfs_quotactl = ufs_quotactl, 811 .vfs_statvfs = chfs_statvfs, 812 .vfs_sync = chfs_sync, 813 .vfs_vget = chfs_vget, 814 .vfs_loadvnode = chfs_loadvnode, 815 .vfs_fhtovp = chfs_fhtovp, 816 .vfs_vptofh = chfs_vptofh, 817 .vfs_init = chfs_init, 818 .vfs_reinit = chfs_reinit, 819 .vfs_done = chfs_done, 820 .vfs_snapshot = chfs_snapshot, 821 .vfs_extattrctl = vfs_stdextattrctl, 822 .vfs_suspendctl = genfs_suspendctl, 823 .vfs_renamelock_enter = genfs_renamelock_enter, 824 .vfs_renamelock_exit = genfs_renamelock_exit, 825 .vfs_fsync = (void *)eopnotsupp, 826 .vfs_opv_descs = chfs_vnodeopv_descs 827 }; 828 829 /* For using CHFS as a module. */ 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 Tue Oct 21 16:10:11 GMT 2025