chfs_vfsops.c revision 1.8
1 /* $NetBSD: chfs_vfsops.c,v 1.8 2013/09/30 18:58:00 hannken 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/malloc.h> 47 #include <sys/fcntl.h> 48 #include <sys/conf.h> 49 #include <sys/buf.h> 50 //XXX needed just for debugging 51 #include <sys/fstrans.h> 52 #include <sys/sleepq.h> 53 #include <sys/lockdebug.h> 54 #include <sys/ktrace.h> 55 56 #include <uvm/uvm.h> 57 #include <uvm/uvm_pager.h> 58 #include <ufs/ufs/dir.h> 59 #include <ufs/ufs/ufs_extern.h> 60 #include <miscfs/genfs/genfs.h> 61 #include <miscfs/genfs/genfs_node.h> 62 #include <miscfs/specfs/specdev.h> 63 #include "chfs.h" 64 #include "chfs_args.h" 65 66 MODULE(MODULE_CLASS_VFS, chfs, "flash"); 67 68 /* --------------------------------------------------------------------- */ 69 /* functions */ 70 71 static int chfs_mount(struct mount *, const char *, void *, size_t *); 72 static int chfs_unmount(struct mount *, int); 73 static int chfs_root(struct mount *, struct vnode **); 74 static int chfs_vget(struct mount *, ino_t, struct vnode **); 75 static int chfs_fhtovp(struct mount *, struct fid *, struct vnode **); 76 static int chfs_vptofh(struct vnode *, struct fid *, size_t *); 77 static int chfs_start(struct mount *, int); 78 static int chfs_statvfs(struct mount *, struct statvfs *); 79 static int chfs_sync(struct mount *, int, kauth_cred_t); 80 static void chfs_init(void); 81 static void chfs_reinit(void); 82 static void chfs_done(void); 83 static int chfs_snapshot(struct mount *, struct vnode *, 84 struct timespec *); 85 86 /* --------------------------------------------------------------------- */ 87 /* structures */ 88 89 int 90 chfs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, 91 kauth_cred_t cred) 92 { 93 return (0); 94 } 95 96 const struct genfs_ops chfs_genfsops = { 97 .gop_size = genfs_size, 98 .gop_alloc = chfs_gop_alloc, 99 .gop_write = genfs_gop_write, 100 .gop_markupdate = ufs_gop_markupdate, 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 (*data_len < sizeof *args) 127 return EINVAL; 128 129 if (mp->mnt_flag & MNT_GETARGS) { 130 ump = VFSTOUFS(mp); 131 if (ump == NULL) 132 return EIO; 133 memset(args, 0, sizeof *args); 134 args->fspec = NULL; 135 *data_len = sizeof *args; 136 return 0; 137 } 138 139 if (mp->mnt_flag & MNT_UPDATE) { 140 /* XXX: There is no support yet to update file system 141 * settings. Should be added. */ 142 143 return ENODEV; 144 } 145 146 if (args->fspec != NULL) { 147 err = pathbuf_copyin(args->fspec, &pb); 148 if (err) { 149 return err; 150 } 151 /* Look up the name and verify that it's sane. */ 152 NDINIT(&nd, LOOKUP, FOLLOW, pb); 153 if ((err = namei(&nd)) != 0 ) 154 return (err); 155 devvp = nd.ni_vp; 156 157 /* Be sure this is a valid block device */ 158 if (devvp->v_type != VBLK) 159 err = ENOTBLK; 160 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 161 err = ENXIO; 162 } 163 164 if (err) { 165 vrele(devvp); 166 return (err); 167 } 168 169 if (mp->mnt_flag & MNT_RDONLY) 170 xflags = FREAD; 171 else 172 xflags = FREAD|FWRITE; 173 174 err = VOP_OPEN(devvp, xflags, FSCRED); 175 if (err) 176 goto fail; 177 178 /* call CHFS mount function */ 179 err = chfs_mountfs(devvp, mp); 180 if (err) { 181 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 182 (void)VOP_CLOSE(devvp, xflags, NOCRED); 183 VOP_UNLOCK(devvp); 184 goto fail; 185 } 186 187 ump = VFSTOUFS(mp); 188 chmp = ump->um_chfs; 189 190 vfs_getnewfsid(mp); 191 chmp->chm_fsmp = mp; 192 193 return set_statvfs_info(path, 194 UIO_USERSPACE, args->fspec, 195 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 196 197 fail: 198 vrele(devvp); 199 return (err); 200 } 201 202 /* chfs_mountfs - init CHFS */ 203 int 204 chfs_mountfs(struct vnode *devvp, struct mount *mp) 205 { 206 struct lwp *l = curlwp; 207 struct proc *p; 208 kauth_cred_t cred; 209 devmajor_t flash_major; 210 dev_t dev; 211 struct ufsmount* ump = NULL; 212 struct chfs_mount* chmp; 213 struct vnode *vp; 214 int err = 0; 215 216 dbg("mountfs()\n"); 217 218 dev = devvp->v_rdev; 219 p = l ? l->l_proc : NULL; 220 cred = l ? l->l_cred : NOCRED; 221 222 /* Flush out any old buffers remaining from a previous use. */ 223 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 224 err = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 225 VOP_UNLOCK(devvp); 226 if (err) 227 return (err); 228 229 /* Setup device. */ 230 flash_major = cdevsw_lookup_major(&flash_cdevsw); 231 232 if (devvp->v_type != VBLK) 233 err = ENOTBLK; 234 else if (bdevsw_lookup(dev) == NULL) 235 err = ENXIO; 236 else if (major(dev) != flash_major) { 237 dbg("major(dev): %d, flash_major: %d\n", 238 major(dev), flash_major); 239 err = ENODEV; 240 } 241 if (err) { 242 vrele(devvp); 243 return (err); 244 } 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 fail; 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 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 321 ebh_close(chmp->chm_ebh); 322 err = EIO; 323 goto fail; 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, &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 fail: 360 kmem_free(chmp->chm_ebh, sizeof(struct chfs_ebh)); 361 kmem_free(chmp, sizeof(struct chfs_mount)); 362 kmem_free(ump, sizeof(struct ufsmount)); 363 return err; 364 } 365 366 /* --------------------------------------------------------------------- */ 367 368 static int 369 chfs_unmount(struct mount *mp, int mntflags) 370 { 371 int flags = 0, i = 0; 372 struct ufsmount *ump; 373 struct chfs_mount *chmp; 374 375 if (mntflags & MNT_FORCE) 376 flags |= FORCECLOSE; 377 378 dbg("[START]\n"); 379 380 ump = VFSTOUFS(mp); 381 chmp = ump->um_chfs; 382 383 /* Stop GC. */ 384 chfs_gc_thread_stop(chmp); 385 386 /* Flush everyt buffer. */ 387 (void)vflush(mp, NULLVP, flags); 388 389 if (chmp->chm_wbuf_len) { 390 mutex_enter(&chmp->chm_lock_mountfields); 391 chfs_flush_pending_wbuf(chmp); 392 mutex_exit(&chmp->chm_lock_mountfields); 393 } 394 395 /* Free node references. */ 396 for (i = 0; i < chmp->chm_ebh->peb_nr; i++) { 397 chfs_free_node_refs(&chmp->chm_blocks[i]); 398 } 399 400 /* Destroy vnode cache hashtable. */ 401 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 402 403 /* Close eraseblock handler. */ 404 ebh_close(chmp->chm_ebh); 405 406 /* Destroy mutexes. */ 407 rw_destroy(&chmp->chm_lock_wbuf); 408 mutex_destroy(&chmp->chm_lock_vnocache); 409 mutex_destroy(&chmp->chm_lock_sizes); 410 mutex_destroy(&chmp->chm_lock_mountfields); 411 412 /* Unmount UFS. */ 413 if (ump->um_devvp->v_type != VBAD) { 414 spec_node_setmountedfs(ump->um_devvp, NULL); 415 } 416 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 417 (void)VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED); 418 vput(ump->um_devvp); 419 420 mutex_destroy(&ump->um_lock); 421 422 /* Everything done. */ 423 kmem_free(ump, sizeof(struct ufsmount)); 424 mp->mnt_data = NULL; 425 mp->mnt_flag &= ~MNT_LOCAL; 426 dbg("[END]\n"); 427 return (0); 428 } 429 430 /* --------------------------------------------------------------------- */ 431 432 static int 433 chfs_root(struct mount *mp, struct vnode **vpp) 434 { 435 struct vnode *vp; 436 int error; 437 438 if ((error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, &vp)) != 0) 439 return error; 440 *vpp = vp; 441 return 0; 442 } 443 444 /* --------------------------------------------------------------------- */ 445 446 extern rb_tree_ops_t frag_rbtree_ops; 447 448 static int 449 chfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 450 { 451 struct chfs_mount *chmp; 452 struct chfs_inode *ip; 453 struct ufsmount *ump; 454 struct vnode *vp; 455 dev_t dev; 456 int error; 457 struct chfs_vnode_cache* chvc = NULL; 458 struct chfs_node_ref* nref = NULL; 459 struct buf *bp; 460 461 dbg("vget() | ino: %llu\n", (unsigned long long)ino); 462 463 ump = VFSTOUFS(mp); 464 dev = ump->um_dev; 465 retry: 466 if (!vpp) { 467 vpp = kmem_alloc(sizeof(struct vnode*), KM_SLEEP); 468 } 469 470 /* Get node from inode hash. */ 471 if ((*vpp = chfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 472 return 0; 473 } 474 475 /* Allocate a new vnode/inode. */ 476 if ((error = getnewvnode(VT_CHFS, 477 mp, chfs_vnodeop_p, NULL, &vp)) != 0) { 478 *vpp = NULL; 479 return (error); 480 } 481 ip = pool_get(&chfs_inode_pool, PR_WAITOK); 482 483 mutex_enter(&chfs_hashlock); 484 if ((*vpp = chfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 485 mutex_exit(&chfs_hashlock); 486 ungetnewvnode(vp); 487 pool_put(&chfs_inode_pool, ip); 488 goto retry; 489 } 490 491 vp->v_vflag |= VV_LOCKSWORK; 492 493 /* Initialize vnode/inode. */ 494 memset(ip, 0, sizeof(*ip)); 495 vp->v_data = ip; 496 ip->vp = vp; 497 ip->ch_type = VTTOCHT(vp->v_type); 498 ip->ump = ump; 499 ip->chmp = chmp = ump->um_chfs; 500 ip->dev = dev; 501 ip->ino = ino; 502 vp->v_mount = mp; 503 genfs_node_init(vp, &chfs_genfsops); 504 505 rb_tree_init(&ip->fragtree, &frag_rbtree_ops); 506 507 chfs_ihashins(ip); 508 mutex_exit(&chfs_hashlock); 509 510 /* Set root inode. */ 511 if (ino == CHFS_ROOTINO) { 512 dbg("SETROOT\n"); 513 vp->v_vflag |= VV_ROOT; 514 vp->v_type = VDIR; 515 ip->ch_type = CHT_DIR; 516 ip->mode = IFMT | IEXEC | IWRITE | IREAD; 517 ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE); 518 chfs_update(vp, NULL, NULL, UPDATE_WAIT); 519 TAILQ_INIT(&ip->dents); 520 chfs_set_vnode_size(vp, 512); 521 } 522 523 mutex_enter(&chmp->chm_lock_vnocache); 524 chvc = chfs_vnode_cache_get(chmp, ino); 525 mutex_exit(&chmp->chm_lock_vnocache); 526 if (!chvc) { 527 dbg("!chvc\n"); 528 /* Initialize the corresponding vnode cache. */ 529 /* XXX, we cant alloc under a lock, refactor this! */ 530 chvc = chfs_vnode_cache_alloc(ino); 531 mutex_enter(&chmp->chm_lock_vnocache); 532 if (ino == CHFS_ROOTINO) { 533 chvc->nlink = 2; 534 chvc->pvno = CHFS_ROOTINO; 535 chvc->state = VNO_STATE_CHECKEDABSENT; 536 } 537 chfs_vnode_cache_add(chmp, chvc); 538 mutex_exit(&chmp->chm_lock_vnocache); 539 540 ip->chvc = chvc; 541 TAILQ_INIT(&ip->dents); 542 } else { 543 dbg("chvc\n"); 544 ip->chvc = chvc; 545 /* We had a vnode cache, the node is already on flash, so read it */ 546 if (ino == CHFS_ROOTINO) { 547 chvc->pvno = CHFS_ROOTINO; 548 TAILQ_INIT(&chvc->scan_dirents); 549 } else { 550 chfs_readvnode(mp, ino, &vp); 551 } 552 553 mutex_enter(&chmp->chm_lock_mountfields); 554 /* Initialize type specific things. */ 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 if (error) { 574 vput(vp); 575 *vpp = NULL; 576 mutex_exit(&chmp->chm_lock_mountfields); 577 return (error); 578 } 579 break; 580 case CHT_LNK: 581 /* Collect data. */ 582 dbg("read_inode_internal | ino: %llu\n", 583 (unsigned long long)ip->ino); 584 error = chfs_read_inode_internal(chmp, ip); 585 if (error) { 586 vput(vp); 587 *vpp = NULL; 588 mutex_exit(&chmp->chm_lock_mountfields); 589 return (error); 590 } 591 592 /* Set link. */ 593 dbg("size: %llu\n", (unsigned long long)ip->size); 594 bp = getiobuf(vp, true); 595 bp->b_blkno = 0; 596 bp->b_bufsize = bp->b_resid = 597 bp->b_bcount = ip->size; 598 bp->b_data = kmem_alloc(ip->size, KM_SLEEP); 599 chfs_read_data(chmp, vp, bp); 600 if (!ip->target) 601 ip->target = kmem_alloc(ip->size, 602 KM_SLEEP); 603 memcpy(ip->target, bp->b_data, ip->size); 604 kmem_free(bp->b_data, ip->size); 605 putiobuf(bp); 606 607 break; 608 case CHT_CHR: 609 /* FALLTHROUGH */ 610 case CHT_BLK: 611 /* FALLTHROUGH */ 612 case CHT_FIFO: 613 /* Collect data. */ 614 dbg("read_inode_internal | ino: %llu\n", 615 (unsigned long long)ip->ino); 616 error = chfs_read_inode_internal(chmp, ip); 617 if (error) { 618 vput(vp); 619 *vpp = NULL; 620 mutex_exit(&chmp->chm_lock_mountfields); 621 return (error); 622 } 623 624 /* Set device. */ 625 bp = getiobuf(vp, true); 626 bp->b_blkno = 0; 627 bp->b_bufsize = bp->b_resid = 628 bp->b_bcount = sizeof(dev_t); 629 bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP); 630 chfs_read_data(chmp, vp, bp); 631 memcpy(&ip->rdev, 632 bp->b_data, sizeof(dev_t)); 633 kmem_free(bp->b_data, sizeof(dev_t)); 634 putiobuf(bp); 635 /* Set specific operations. */ 636 if (ip->ch_type == CHT_FIFO) { 637 vp->v_op = chfs_fifoop_p; 638 } else { 639 vp->v_op = chfs_specop_p; 640 spec_node_init(vp, ip->rdev); 641 } 642 643 break; 644 case CHT_BLANK: 645 /* FALLTHROUGH */ 646 case CHT_BAD: 647 break; 648 } 649 mutex_exit(&chmp->chm_lock_mountfields); 650 651 } 652 653 /* Finish inode initalization. */ 654 ip->devvp = ump->um_devvp; 655 vref(ip->devvp); 656 657 uvm_vnp_setsize(vp, ip->size); 658 *vpp = vp; 659 660 return 0; 661 } 662 663 /* --------------------------------------------------------------------- */ 664 665 static int 666 chfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 667 { 668 return ENODEV; 669 } 670 671 /* --------------------------------------------------------------------- */ 672 673 static int 674 chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 675 { 676 return ENODEV; 677 } 678 679 /* --------------------------------------------------------------------- */ 680 681 static int 682 chfs_start(struct mount *mp, int flags) 683 { 684 return 0; 685 } 686 687 /* --------------------------------------------------------------------- */ 688 689 static int 690 chfs_statvfs(struct mount *mp, struct statvfs *sbp) 691 { 692 struct chfs_mount *chmp; 693 struct ufsmount *ump; 694 dbg("statvfs\n"); 695 696 ump = VFSTOUFS(mp); 697 chmp = ump->um_chfs; 698 699 sbp->f_flag = mp->mnt_flag; 700 sbp->f_bsize = chmp->chm_ebh->eb_size; 701 sbp->f_frsize = chmp->chm_ebh->eb_size; 702 sbp->f_iosize = chmp->chm_ebh->eb_size; 703 704 sbp->f_blocks = chmp->chm_ebh->peb_nr; 705 sbp->f_files = 0; 706 sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write; 707 708 sbp->f_bfree = chmp->chm_nr_free_blocks; 709 sbp->f_bresvd = chmp->chm_resv_blocks_write; 710 711 /* FFS specific */ 712 sbp->f_ffree = 0; 713 sbp->f_favail = 0; 714 sbp->f_fresvd = 0; 715 716 copy_statvfs_info(sbp, mp); 717 718 return 0; 719 } 720 721 /* --------------------------------------------------------------------- */ 722 723 static int 724 chfs_sync(struct mount *mp, int waitfor, 725 kauth_cred_t uc) 726 { 727 return 0; 728 } 729 730 /* --------------------------------------------------------------------- */ 731 732 static void 733 chfs_init(void) 734 { 735 /* Initialize pools and inode hash. */ 736 chfs_alloc_pool_caches(); 737 chfs_ihashinit(); 738 pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0, 739 "chfsinopl", &pool_allocator_nointr, IPL_NONE); 740 ufs_init(); 741 } 742 743 /* --------------------------------------------------------------------- */ 744 745 static void 746 chfs_reinit(void) 747 { 748 chfs_ihashreinit(); 749 ufs_reinit(); 750 } 751 752 /* --------------------------------------------------------------------- */ 753 754 static void 755 chfs_done(void) 756 { 757 ufs_done(); 758 chfs_ihashdone(); 759 pool_destroy(&chfs_inode_pool); 760 chfs_destroy_pool_caches(); 761 } 762 763 /* --------------------------------------------------------------------- */ 764 765 static int 766 chfs_snapshot(struct mount *mp, struct vnode *vp, 767 struct timespec *ctime) 768 { 769 return ENODEV; 770 } 771 772 /* --------------------------------------------------------------------- */ 773 774 /* 775 * chfs vfs operations. 776 */ 777 778 extern const struct vnodeopv_desc chfs_fifoop_opv_desc; 779 extern const struct vnodeopv_desc chfs_specop_opv_desc; 780 extern const struct vnodeopv_desc chfs_vnodeop_opv_desc; 781 782 const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = { 783 &chfs_fifoop_opv_desc, 784 &chfs_specop_opv_desc, 785 &chfs_vnodeop_opv_desc, 786 NULL, 787 }; 788 789 struct vfsops chfs_vfsops = { 790 MOUNT_CHFS, /* vfs_name */ 791 sizeof (struct chfs_args), 792 chfs_mount, /* vfs_mount */ 793 chfs_start, /* vfs_start */ 794 chfs_unmount, /* vfs_unmount */ 795 chfs_root, /* vfs_root */ 796 ufs_quotactl, /* vfs_quotactl */ 797 chfs_statvfs, /* vfs_statvfs */ 798 chfs_sync, /* vfs_sync */ 799 chfs_vget, /* vfs_vget */ 800 chfs_fhtovp, /* vfs_fhtovp */ 801 chfs_vptofh, /* vfs_vptofh */ 802 chfs_init, /* vfs_init */ 803 chfs_reinit, /* vfs_reinit */ 804 chfs_done, /* vfs_done */ 805 NULL, /* vfs_mountroot */ 806 chfs_snapshot, /* vfs_snapshot */ 807 vfs_stdextattrctl, /* vfs_extattrctl */ 808 (void *)eopnotsupp, /* vfs_suspendctl */ 809 genfs_renamelock_enter, 810 genfs_renamelock_exit, 811 (void *)eopnotsupp, 812 chfs_vnodeopv_descs, 813 0, /* vfs_refcount */ 814 { NULL, NULL }, 815 }; 816 817 /* For using CHFS as a module. */ 818 static int 819 chfs_modcmd(modcmd_t cmd, void *arg) 820 { 821 switch (cmd) { 822 case MODULE_CMD_INIT: 823 return vfs_attach(&chfs_vfsops); 824 case MODULE_CMD_FINI: 825 return vfs_detach(&chfs_vfsops); 826 default: 827 return ENOTTY; 828 } 829 } 830
Indexes created Fri Sep 26 20:09:58 GMT 2025