chfs_vfsops.c revision 1.17
1 /* $NetBSD: chfs_vfsops.c,v 1.17 2017/11/14 22:06:40 riastradh 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 goto fail0; 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 goto fail0; 246 247 /* Connect CHFS to UFS. */ 248 ump = kmem_zalloc(sizeof(struct ufsmount), KM_SLEEP); 249 250 ump->um_fstype = UFS1; 251 ump->um_chfs = kmem_zalloc(sizeof(struct chfs_mount), KM_SLEEP); 252 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 253 254 chmp = ump->um_chfs; 255 256 /* Initialize erase block handler. */ 257 chmp->chm_ebh = kmem_alloc(sizeof(struct chfs_ebh), KM_SLEEP); 258 259 dbg("[]opening flash: %u\n", (unsigned int)devvp->v_rdev); 260 err = ebh_open(chmp->chm_ebh, devvp->v_rdev); 261 if (err) { 262 dbg("error while opening flash\n"); 263 goto fail1; 264 } 265 266 //TODO check flash sizes 267 268 /* Initialize vnode cache's hashtable and eraseblock array. */ 269 chmp->chm_gbl_version = 0; 270 chmp->chm_vnocache_hash = chfs_vnocache_hash_init(); 271 272 chmp->chm_blocks = kmem_zalloc(chmp->chm_ebh->peb_nr * 273 sizeof(struct chfs_eraseblock), KM_SLEEP); 274 275 /* Initialize mutexes. */ 276 mutex_init(&chmp->chm_lock_mountfields, MUTEX_DEFAULT, IPL_NONE); 277 mutex_init(&chmp->chm_lock_sizes, MUTEX_DEFAULT, IPL_NONE); 278 mutex_init(&chmp->chm_lock_vnocache, MUTEX_DEFAULT, IPL_NONE); 279 280 /* Initialize read/write contants. (from UFS) */ 281 chmp->chm_fs_bmask = -4096; 282 chmp->chm_fs_bsize = 4096; 283 chmp->chm_fs_qbmask = 4095; 284 chmp->chm_fs_bshift = 12; 285 chmp->chm_fs_fmask = -2048; 286 chmp->chm_fs_qfmask = 2047; 287 288 /* Initialize writebuffer. */ 289 chmp->chm_wbuf_pagesize = chmp->chm_ebh->flash_if->page_size; 290 dbg("wbuf size: %zu\n", chmp->chm_wbuf_pagesize); 291 chmp->chm_wbuf = kmem_alloc(chmp->chm_wbuf_pagesize, KM_SLEEP); 292 rw_init(&chmp->chm_lock_wbuf); 293 294 /* Initialize queues. */ 295 TAILQ_INIT(&chmp->chm_free_queue); 296 TAILQ_INIT(&chmp->chm_clean_queue); 297 TAILQ_INIT(&chmp->chm_dirty_queue); 298 TAILQ_INIT(&chmp->chm_very_dirty_queue); 299 TAILQ_INIT(&chmp->chm_erasable_pending_wbuf_queue); 300 TAILQ_INIT(&chmp->chm_erase_pending_queue); 301 302 /* Initialize flash-specific constants. */ 303 chfs_calc_trigger_levels(chmp); 304 305 /* Initialize sizes. */ 306 chmp->chm_nr_free_blocks = 0; 307 chmp->chm_nr_erasable_blocks = 0; 308 chmp->chm_max_vno = 2; 309 chmp->chm_checked_vno = 2; 310 chmp->chm_unchecked_size = 0; 311 chmp->chm_used_size = 0; 312 chmp->chm_dirty_size = 0; 313 chmp->chm_wasted_size = 0; 314 chmp->chm_free_size = chmp->chm_ebh->eb_size * chmp->chm_ebh->peb_nr; 315 316 /* Build filesystem. */ 317 err = chfs_build_filesystem(chmp); 318 319 if (err) { 320 /* Armageddon and return. */ 321 err = EIO; 322 goto fail2; 323 } 324 325 /* Initialize UFS. */ 326 mp->mnt_data = ump; 327 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 328 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CHFS); 329 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 330 mp->mnt_stat.f_namemax = MAXNAMLEN; 331 mp->mnt_flag |= MNT_LOCAL; 332 mp->mnt_fs_bshift = PAGE_SHIFT; 333 mp->mnt_dev_bshift = DEV_BSHIFT; 334 mp->mnt_iflag |= IMNT_MPSAFE; 335 ump->um_flags = 0; 336 ump->um_mountp = mp; 337 ump->um_dev = dev; 338 ump->um_devvp = devvp; 339 ump->um_maxfilesize = 1048512 * 1024; 340 341 /* Allocate the root vnode. */ 342 err = VFS_VGET(mp, CHFS_ROOTINO, &vp); 343 if (err) { 344 dbg("error: %d while allocating root node\n", err); 345 return err; 346 } 347 vput(vp); 348 349 /* Start GC. */ 350 chfs_gc_thread_start(chmp); 351 mutex_enter(&chmp->chm_lock_mountfields); 352 chfs_gc_trigger(chmp); 353 mutex_exit(&chmp->chm_lock_mountfields); 354 355 spec_node_setmountedfs(devvp, mp); 356 return 0; 357 358 fail2: 359 KASSERT(TAILQ_EMPTY(&chmp->chm_erase_pending_queue)); 360 KASSERT(TAILQ_EMPTY(&chmp->chm_erasable_pending_wbuf_queue)); 361 KASSERT(TAILQ_EMPTY(&chmp->chm_very_dirty_queue)); 362 KASSERT(TAILQ_EMPTY(&chmp->chm_dirty_queue)); 363 KASSERT(TAILQ_EMPTY(&chmp->chm_clean_queue)); 364 KASSERT(TAILQ_EMPTY(&chmp->chm_free_queue)); 365 rw_destroy(&chmp->chm_lock_wbuf); 366 kmem_free(chmp->chm_wbuf, chmp->chm_wbuf_pagesize); 367 mutex_destroy(&chmp->chm_lock_vnocache); 368 mutex_destroy(&chmp->chm_lock_sizes); 369 mutex_destroy(&chmp->chm_lock_mountfields); 370 kmem_free(chmp->chm_blocks, chmp->chm_ebh->peb_nr * 371 sizeof(struct chfs_eraseblock)); 372 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 373 ebh_close(chmp->chm_ebh); 374 375 fail1: 376 kmem_free(chmp->chm_ebh, sizeof(struct chfs_ebh)); 377 mutex_destroy(&ump->um_lock); 378 kmem_free(chmp, sizeof(struct chfs_mount)); 379 kmem_free(ump, sizeof(struct ufsmount)); 380 381 fail0: 382 KASSERT(err); 383 return err; 384 } 385 386 /* --------------------------------------------------------------------- */ 387 388 static int 389 chfs_unmount(struct mount *mp, int mntflags) 390 { 391 int flags = 0, i = 0; 392 struct ufsmount *ump; 393 struct chfs_mount *chmp; 394 395 if (mntflags & MNT_FORCE) 396 flags |= FORCECLOSE; 397 398 dbg("[START]\n"); 399 400 ump = VFSTOUFS(mp); 401 chmp = ump->um_chfs; 402 403 /* Stop GC. */ 404 chfs_gc_thread_stop(chmp); 405 406 /* Flush everyt buffer. */ 407 (void)vflush(mp, NULLVP, flags); 408 409 if (chmp->chm_wbuf_len) { 410 mutex_enter(&chmp->chm_lock_mountfields); 411 chfs_flush_pending_wbuf(chmp); 412 mutex_exit(&chmp->chm_lock_mountfields); 413 } 414 415 /* Free node references. */ 416 for (i = 0; i < chmp->chm_ebh->peb_nr; i++) { 417 chfs_free_node_refs(&chmp->chm_blocks[i]); 418 } 419 420 /* Destroy vnode cache hashtable. */ 421 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 422 423 /* Close eraseblock handler. */ 424 ebh_close(chmp->chm_ebh); 425 426 /* Destroy mutexes. */ 427 rw_destroy(&chmp->chm_lock_wbuf); 428 mutex_destroy(&chmp->chm_lock_vnocache); 429 mutex_destroy(&chmp->chm_lock_sizes); 430 mutex_destroy(&chmp->chm_lock_mountfields); 431 432 /* Unmount UFS. */ 433 if (ump->um_devvp->v_type != VBAD) { 434 spec_node_setmountedfs(ump->um_devvp, NULL); 435 } 436 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 437 (void)VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED); 438 vput(ump->um_devvp); 439 440 mutex_destroy(&ump->um_lock); 441 442 /* Everything done. */ 443 kmem_free(ump, sizeof(struct ufsmount)); 444 mp->mnt_data = NULL; 445 mp->mnt_flag &= ~MNT_LOCAL; 446 dbg("[END]\n"); 447 return (0); 448 } 449 450 /* --------------------------------------------------------------------- */ 451 452 static int 453 chfs_root(struct mount *mp, struct vnode **vpp) 454 { 455 struct vnode *vp; 456 int error; 457 458 if ((error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, &vp)) != 0) 459 return error; 460 *vpp = vp; 461 return 0; 462 } 463 464 /* --------------------------------------------------------------------- */ 465 466 extern rb_tree_ops_t frag_rbtree_ops; 467 468 static int 469 chfs_loadvnode(struct mount *mp, struct vnode *vp, 470 const void *key, size_t key_len, const void **new_key) 471 { 472 struct chfs_mount *chmp; 473 struct chfs_inode *ip; 474 struct ufsmount *ump; 475 dev_t dev; 476 int error; 477 struct chfs_vnode_cache* chvc = NULL; 478 struct chfs_node_ref* nref = NULL; 479 struct buf *bp; 480 ino_t ino; 481 482 KASSERT(key_len == sizeof(ino)); 483 memcpy(&ino, key, key_len); 484 485 dbg("vget() | ino: %llu\n", (unsigned long long)ino); 486 487 ump = VFSTOUFS(mp); 488 dev = ump->um_dev; 489 490 ip = pool_get(&chfs_inode_pool, PR_WAITOK); 491 492 /* Initialize vnode/inode. */ 493 memset(ip, 0, sizeof(*ip)); 494 ip->vp = vp; 495 ip->ump = ump; 496 ip->chmp = chmp = ump->um_chfs; 497 ip->dev = dev; 498 ip->ino = ino; 499 500 rb_tree_init(&ip->fragtree, &frag_rbtree_ops); 501 502 vp->v_tag = VT_CHFS; 503 vp->v_op = chfs_vnodeop_p; 504 vp->v_vflag |= VV_LOCKSWORK; 505 if (ino == CHFS_ROOTINO) 506 vp->v_vflag |= VV_ROOT; 507 vp->v_data = ip; 508 509 /* Set root inode. */ 510 if (ino == CHFS_ROOTINO) { 511 dbg("SETROOT\n"); 512 vp->v_type = VDIR; 513 ip->ch_type = CHT_DIR; 514 ip->mode = IFMT | IEXEC | IWRITE | IREAD; 515 ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE); 516 chfs_update(vp, NULL, NULL, UPDATE_WAIT); 517 TAILQ_INIT(&ip->dents); 518 chfs_set_vnode_size(vp, 512); 519 } 520 521 mutex_enter(&chmp->chm_lock_vnocache); 522 chvc = chfs_vnode_cache_get(chmp, ino); 523 mutex_exit(&chmp->chm_lock_vnocache); 524 if (!chvc) { 525 dbg("!chvc\n"); 526 /* Initialize the corresponding vnode cache. */ 527 /* XXX, we cant alloc under a lock, refactor this! */ 528 chvc = chfs_vnode_cache_alloc(ino); 529 mutex_enter(&chmp->chm_lock_vnocache); 530 if (ino == CHFS_ROOTINO) { 531 chvc->nlink = 2; 532 chvc->pvno = CHFS_ROOTINO; 533 chvc->state = VNO_STATE_CHECKEDABSENT; 534 } 535 chfs_vnode_cache_add(chmp, chvc); 536 mutex_exit(&chmp->chm_lock_vnocache); 537 538 ip->chvc = chvc; 539 TAILQ_INIT(&ip->dents); 540 } else { 541 dbg("chvc\n"); 542 ip->chvc = chvc; 543 /* We had a vnode cache, the node is already on flash, so read it */ 544 if (ino == CHFS_ROOTINO) { 545 chvc->pvno = CHFS_ROOTINO; 546 TAILQ_INIT(&chvc->scan_dirents); 547 } else { 548 chfs_readvnode(mp, ino, &vp); 549 } 550 551 mutex_enter(&chmp->chm_lock_mountfields); 552 /* Initialize type specific things. */ 553 error = 0; 554 switch (ip->ch_type) { 555 case CHT_DIR: 556 /* Read every dirent. */ 557 nref = chvc->dirents; 558 while (nref && 559 (struct chfs_vnode_cache *)nref != chvc) { 560 chfs_readdirent(mp, nref, ip); 561 nref = nref->nref_next; 562 } 563 chfs_set_vnode_size(vp, 512); 564 break; 565 case CHT_REG: 566 /* FALLTHROUGH */ 567 case CHT_SOCK: 568 /* Collect data. */ 569 dbg("read_inode_internal | ino: %llu\n", 570 (unsigned long long)ip->ino); 571 error = chfs_read_inode(chmp, ip); 572 break; 573 case CHT_LNK: 574 /* Collect data. */ 575 dbg("read_inode_internal | ino: %llu\n", 576 (unsigned long long)ip->ino); 577 error = chfs_read_inode_internal(chmp, ip); 578 if (error) 579 break; 580 581 /* Set link. */ 582 dbg("size: %llu\n", (unsigned long long)ip->size); 583 bp = getiobuf(vp, true); 584 bp->b_blkno = 0; 585 bp->b_bufsize = bp->b_resid = 586 bp->b_bcount = ip->size; 587 bp->b_data = kmem_alloc(ip->size, KM_SLEEP); 588 chfs_read_data(chmp, vp, bp); 589 if (!ip->target) 590 ip->target = kmem_alloc(ip->size, 591 KM_SLEEP); 592 memcpy(ip->target, bp->b_data, ip->size); 593 kmem_free(bp->b_data, ip->size); 594 putiobuf(bp); 595 596 break; 597 case CHT_CHR: 598 /* FALLTHROUGH */ 599 case CHT_BLK: 600 /* FALLTHROUGH */ 601 case CHT_FIFO: 602 /* Collect data. */ 603 dbg("read_inode_internal | ino: %llu\n", 604 (unsigned long long)ip->ino); 605 error = chfs_read_inode_internal(chmp, ip); 606 if (error) 607 break; 608 609 /* Set device. */ 610 bp = getiobuf(vp, true); 611 bp->b_blkno = 0; 612 bp->b_bufsize = bp->b_resid = 613 bp->b_bcount = sizeof(dev_t); 614 bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP); 615 chfs_read_data(chmp, vp, bp); 616 memcpy(&ip->rdev, 617 bp->b_data, sizeof(dev_t)); 618 kmem_free(bp->b_data, sizeof(dev_t)); 619 putiobuf(bp); 620 /* Set specific operations. */ 621 if (ip->ch_type == CHT_FIFO) { 622 vp->v_op = chfs_fifoop_p; 623 } else { 624 vp->v_op = chfs_specop_p; 625 spec_node_init(vp, ip->rdev); 626 } 627 628 break; 629 case CHT_BLANK: 630 /* FALLTHROUGH */ 631 case CHT_BAD: 632 break; 633 } 634 mutex_exit(&chmp->chm_lock_mountfields); 635 if (error) { 636 vp->v_data = NULL; 637 KASSERT(TAILQ_FIRST(&ip->dents) == NULL); 638 pool_put(&chfs_inode_pool, ip); 639 return error; 640 } 641 642 } 643 644 /* Finish inode initalization. */ 645 ip->ch_type = VTTOCHT(vp->v_type); 646 ip->devvp = ump->um_devvp; 647 vref(ip->devvp); 648 649 genfs_node_init(vp, &chfs_genfsops); 650 uvm_vnp_setsize(vp, ip->size); 651 652 *new_key = &ip->ino; 653 654 return 0; 655 } 656 657 /* --------------------------------------------------------------------- */ 658 659 static int 660 chfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 661 { 662 int error; 663 664 error = vcache_get(mp, &ino, sizeof(ino), vpp); 665 if (error) 666 return error; 667 668 error = vn_lock(*vpp, LK_EXCLUSIVE); 669 if (error) { 670 vrele(*vpp); 671 *vpp = NULL; 672 return error; 673 } 674 675 return 0; 676 } 677 678 /* --------------------------------------------------------------------- */ 679 680 681 static int 682 chfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 683 { 684 return ENODEV; 685 } 686 687 /* --------------------------------------------------------------------- */ 688 689 static int 690 chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 691 { 692 return ENODEV; 693 } 694 695 /* --------------------------------------------------------------------- */ 696 697 static int 698 chfs_start(struct mount *mp, int flags) 699 { 700 return 0; 701 } 702 703 /* --------------------------------------------------------------------- */ 704 705 static int 706 chfs_statvfs(struct mount *mp, struct statvfs *sbp) 707 { 708 struct chfs_mount *chmp; 709 struct ufsmount *ump; 710 dbg("statvfs\n"); 711 712 ump = VFSTOUFS(mp); 713 chmp = ump->um_chfs; 714 715 sbp->f_flag = mp->mnt_flag; 716 sbp->f_bsize = chmp->chm_ebh->eb_size; 717 sbp->f_frsize = chmp->chm_ebh->eb_size; 718 sbp->f_iosize = chmp->chm_ebh->eb_size; 719 720 sbp->f_blocks = chmp->chm_ebh->peb_nr; 721 sbp->f_files = 0; 722 sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write; 723 724 sbp->f_bfree = chmp->chm_nr_free_blocks; 725 sbp->f_bresvd = chmp->chm_resv_blocks_write; 726 727 /* FFS specific */ 728 sbp->f_ffree = 0; 729 sbp->f_favail = 0; 730 sbp->f_fresvd = 0; 731 732 copy_statvfs_info(sbp, mp); 733 734 return 0; 735 } 736 737 /* --------------------------------------------------------------------- */ 738 739 static int 740 chfs_sync(struct mount *mp, int waitfor, 741 kauth_cred_t uc) 742 { 743 return 0; 744 } 745 746 /* --------------------------------------------------------------------- */ 747 748 static void 749 chfs_init(void) 750 { 751 /* Initialize pools and inode hash. */ 752 chfs_alloc_pool_caches(); 753 pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0, 754 "chfsinopl", &pool_allocator_nointr, IPL_NONE); 755 ufs_init(); 756 } 757 758 /* --------------------------------------------------------------------- */ 759 760 static void 761 chfs_reinit(void) 762 { 763 ufs_reinit(); 764 } 765 766 /* --------------------------------------------------------------------- */ 767 768 static void 769 chfs_done(void) 770 { 771 ufs_done(); 772 pool_destroy(&chfs_inode_pool); 773 chfs_destroy_pool_caches(); 774 } 775 776 /* --------------------------------------------------------------------- */ 777 778 static int 779 chfs_snapshot(struct mount *mp, struct vnode *vp, 780 struct timespec *ctime) 781 { 782 return ENODEV; 783 } 784 785 /* --------------------------------------------------------------------- */ 786 787 /* 788 * chfs vfs operations. 789 */ 790 791 extern const struct vnodeopv_desc chfs_fifoop_opv_desc; 792 extern const struct vnodeopv_desc chfs_specop_opv_desc; 793 extern const struct vnodeopv_desc chfs_vnodeop_opv_desc; 794 795 const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = { 796 &chfs_fifoop_opv_desc, 797 &chfs_specop_opv_desc, 798 &chfs_vnodeop_opv_desc, 799 NULL, 800 }; 801 802 struct vfsops chfs_vfsops = { 803 .vfs_name = MOUNT_CHFS, 804 .vfs_min_mount_data = sizeof (struct chfs_args), 805 .vfs_mount = chfs_mount, 806 .vfs_start = chfs_start, 807 .vfs_unmount = chfs_unmount, 808 .vfs_root = chfs_root, 809 .vfs_quotactl = ufs_quotactl, 810 .vfs_statvfs = chfs_statvfs, 811 .vfs_sync = chfs_sync, 812 .vfs_vget = chfs_vget, 813 .vfs_loadvnode = chfs_loadvnode, 814 .vfs_fhtovp = chfs_fhtovp, 815 .vfs_vptofh = chfs_vptofh, 816 .vfs_init = chfs_init, 817 .vfs_reinit = chfs_reinit, 818 .vfs_done = chfs_done, 819 .vfs_snapshot = chfs_snapshot, 820 .vfs_extattrctl = vfs_stdextattrctl, 821 .vfs_suspendctl = genfs_suspendctl, 822 .vfs_renamelock_enter = genfs_renamelock_enter, 823 .vfs_renamelock_exit = genfs_renamelock_exit, 824 .vfs_fsync = (void *)eopnotsupp, 825 .vfs_opv_descs = chfs_vnodeopv_descs 826 }; 827 828 /* For using CHFS as a module. */ 829 static int 830 chfs_modcmd(modcmd_t cmd, void *arg) 831 { 832 switch (cmd) { 833 case MODULE_CMD_INIT: 834 return vfs_attach(&chfs_vfsops); 835 case MODULE_CMD_FINI: 836 return vfs_detach(&chfs_vfsops); 837 default: 838 return ENOTTY; 839 } 840 } 841
Indexes created Fri Sep 26 20:09:58 GMT 2025