chfs_vfsops.c revision 1.11.2.2
1 /* $NetBSD: chfs_vfsops.c,v 1.11.2.2 2015/01/17 12:10:53 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 *, struct vnode **); 73 static int chfs_vget(struct mount *, ino_t, struct vnode **); 74 static int chfs_fhtovp(struct mount *, struct fid *, 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 }; 101 102 struct pool chfs_inode_pool; 103 104 /* for looking up the major for flash */ 105 extern const struct cdevsw flash_cdevsw; 106 107 /* --------------------------------------------------------------------- */ 108 109 static int 110 chfs_mount(struct mount *mp, 111 const char *path, void *data, size_t *data_len) 112 { 113 struct lwp *l = curlwp; 114 struct nameidata nd; 115 struct pathbuf *pb; 116 struct vnode *devvp = NULL; 117 struct ufs_args *args = data; 118 struct ufsmount *ump = NULL; 119 struct chfs_mount *chmp; 120 int err = 0; 121 int xflags; 122 123 dbg("mount()\n"); 124 125 if (args == NULL) 126 return EINVAL; 127 if (*data_len < sizeof *args) 128 return EINVAL; 129 130 if (mp->mnt_flag & MNT_GETARGS) { 131 ump = VFSTOUFS(mp); 132 if (ump == NULL) 133 return EIO; 134 memset(args, 0, sizeof *args); 135 args->fspec = NULL; 136 *data_len = sizeof *args; 137 return 0; 138 } 139 140 if (mp->mnt_flag & MNT_UPDATE) { 141 /* XXX: There is no support yet to update file system 142 * settings. Should be added. */ 143 144 return ENODEV; 145 } 146 147 if (args->fspec != NULL) { 148 err = pathbuf_copyin(args->fspec, &pb); 149 if (err) { 150 return err; 151 } 152 /* Look up the name and verify that it's sane. */ 153 NDINIT(&nd, LOOKUP, FOLLOW, pb); 154 if ((err = namei(&nd)) != 0 ) { 155 pathbuf_destroy(pb); 156 return (err); 157 } 158 devvp = nd.ni_vp; 159 pathbuf_destroy(pb); 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 return (err); 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 vrele(devvp); 245 return (err); 246 } 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 fail; 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 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 323 ebh_close(chmp->chm_ebh); 324 err = EIO; 325 goto fail; 326 } 327 328 /* Initialize UFS. */ 329 mp->mnt_data = ump; 330 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 331 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CHFS); 332 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 333 mp->mnt_stat.f_namemax = MAXNAMLEN; 334 mp->mnt_flag |= MNT_LOCAL; 335 mp->mnt_fs_bshift = PAGE_SHIFT; 336 mp->mnt_dev_bshift = DEV_BSHIFT; 337 mp->mnt_iflag |= IMNT_MPSAFE; 338 ump->um_flags = 0; 339 ump->um_mountp = mp; 340 ump->um_dev = dev; 341 ump->um_devvp = devvp; 342 ump->um_maxfilesize = 1048512 * 1024; 343 344 /* Allocate the root vnode. */ 345 err = VFS_VGET(mp, CHFS_ROOTINO, &vp); 346 if (err) { 347 dbg("error: %d while allocating root node\n", err); 348 return err; 349 } 350 vput(vp); 351 352 /* Start GC. */ 353 chfs_gc_thread_start(chmp); 354 mutex_enter(&chmp->chm_lock_mountfields); 355 chfs_gc_trigger(chmp); 356 mutex_exit(&chmp->chm_lock_mountfields); 357 358 spec_node_setmountedfs(devvp, mp); 359 return 0; 360 361 fail: 362 kmem_free(chmp->chm_ebh, sizeof(struct chfs_ebh)); 363 kmem_free(chmp, sizeof(struct chfs_mount)); 364 kmem_free(ump, sizeof(struct ufsmount)); 365 return err; 366 } 367 368 /* --------------------------------------------------------------------- */ 369 370 static int 371 chfs_unmount(struct mount *mp, int mntflags) 372 { 373 int flags = 0, i = 0; 374 struct ufsmount *ump; 375 struct chfs_mount *chmp; 376 377 if (mntflags & MNT_FORCE) 378 flags |= FORCECLOSE; 379 380 dbg("[START]\n"); 381 382 ump = VFSTOUFS(mp); 383 chmp = ump->um_chfs; 384 385 /* Stop GC. */ 386 chfs_gc_thread_stop(chmp); 387 388 /* Flush everyt buffer. */ 389 (void)vflush(mp, NULLVP, flags); 390 391 if (chmp->chm_wbuf_len) { 392 mutex_enter(&chmp->chm_lock_mountfields); 393 chfs_flush_pending_wbuf(chmp); 394 mutex_exit(&chmp->chm_lock_mountfields); 395 } 396 397 /* Free node references. */ 398 for (i = 0; i < chmp->chm_ebh->peb_nr; i++) { 399 chfs_free_node_refs(&chmp->chm_blocks[i]); 400 } 401 402 /* Destroy vnode cache hashtable. */ 403 chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash); 404 405 /* Close eraseblock handler. */ 406 ebh_close(chmp->chm_ebh); 407 408 /* Destroy mutexes. */ 409 rw_destroy(&chmp->chm_lock_wbuf); 410 mutex_destroy(&chmp->chm_lock_vnocache); 411 mutex_destroy(&chmp->chm_lock_sizes); 412 mutex_destroy(&chmp->chm_lock_mountfields); 413 414 /* Unmount UFS. */ 415 if (ump->um_devvp->v_type != VBAD) { 416 spec_node_setmountedfs(ump->um_devvp, NULL); 417 } 418 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 419 (void)VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED); 420 vput(ump->um_devvp); 421 422 mutex_destroy(&ump->um_lock); 423 424 /* Everything done. */ 425 kmem_free(ump, sizeof(struct ufsmount)); 426 mp->mnt_data = NULL; 427 mp->mnt_flag &= ~MNT_LOCAL; 428 dbg("[END]\n"); 429 return (0); 430 } 431 432 /* --------------------------------------------------------------------- */ 433 434 static int 435 chfs_root(struct mount *mp, struct vnode **vpp) 436 { 437 struct vnode *vp; 438 int error; 439 440 if ((error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, &vp)) != 0) 441 return error; 442 *vpp = vp; 443 return 0; 444 } 445 446 /* --------------------------------------------------------------------- */ 447 448 extern rb_tree_ops_t frag_rbtree_ops; 449 450 static int 451 chfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 452 { 453 struct chfs_mount *chmp; 454 struct chfs_inode *ip; 455 struct ufsmount *ump; 456 struct vnode *vp; 457 dev_t dev; 458 int error; 459 struct chfs_vnode_cache* chvc = NULL; 460 struct chfs_node_ref* nref = NULL; 461 struct buf *bp; 462 463 dbg("vget() | ino: %llu\n", (unsigned long long)ino); 464 465 ump = VFSTOUFS(mp); 466 dev = ump->um_dev; 467 retry: 468 if (!vpp) { 469 vpp = kmem_alloc(sizeof(struct vnode*), KM_SLEEP); 470 } 471 472 /* Get node from inode hash. */ 473 if ((*vpp = chfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 474 return 0; 475 } 476 477 /* Allocate a new vnode/inode. */ 478 if ((error = getnewvnode(VT_CHFS, 479 mp, chfs_vnodeop_p, NULL, &vp)) != 0) { 480 *vpp = NULL; 481 return (error); 482 } 483 ip = pool_get(&chfs_inode_pool, PR_WAITOK); 484 485 mutex_enter(&chfs_hashlock); 486 if ((*vpp = chfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 487 mutex_exit(&chfs_hashlock); 488 ungetnewvnode(vp); 489 pool_put(&chfs_inode_pool, ip); 490 goto retry; 491 } 492 493 vp->v_vflag |= VV_LOCKSWORK; 494 495 /* Initialize vnode/inode. */ 496 memset(ip, 0, sizeof(*ip)); 497 vp->v_data = ip; 498 ip->vp = vp; 499 ip->ch_type = VTTOCHT(vp->v_type); 500 ip->ump = ump; 501 ip->chmp = chmp = ump->um_chfs; 502 ip->dev = dev; 503 ip->ino = ino; 504 vp->v_mount = mp; 505 genfs_node_init(vp, &chfs_genfsops); 506 507 rb_tree_init(&ip->fragtree, &frag_rbtree_ops); 508 509 chfs_ihashins(ip); 510 mutex_exit(&chfs_hashlock); 511 512 /* Set root inode. */ 513 if (ino == CHFS_ROOTINO) { 514 dbg("SETROOT\n"); 515 vp->v_vflag |= VV_ROOT; 516 vp->v_type = VDIR; 517 ip->ch_type = CHT_DIR; 518 ip->mode = IFMT | IEXEC | IWRITE | IREAD; 519 ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE); 520 chfs_update(vp, NULL, NULL, UPDATE_WAIT); 521 TAILQ_INIT(&ip->dents); 522 chfs_set_vnode_size(vp, 512); 523 } 524 525 mutex_enter(&chmp->chm_lock_vnocache); 526 chvc = chfs_vnode_cache_get(chmp, ino); 527 mutex_exit(&chmp->chm_lock_vnocache); 528 if (!chvc) { 529 dbg("!chvc\n"); 530 /* Initialize the corresponding vnode cache. */ 531 /* XXX, we cant alloc under a lock, refactor this! */ 532 chvc = chfs_vnode_cache_alloc(ino); 533 mutex_enter(&chmp->chm_lock_vnocache); 534 if (ino == CHFS_ROOTINO) { 535 chvc->nlink = 2; 536 chvc->pvno = CHFS_ROOTINO; 537 chvc->state = VNO_STATE_CHECKEDABSENT; 538 } 539 chfs_vnode_cache_add(chmp, chvc); 540 mutex_exit(&chmp->chm_lock_vnocache); 541 542 ip->chvc = chvc; 543 TAILQ_INIT(&ip->dents); 544 } else { 545 dbg("chvc\n"); 546 ip->chvc = chvc; 547 /* We had a vnode cache, the node is already on flash, so read it */ 548 if (ino == CHFS_ROOTINO) { 549 chvc->pvno = CHFS_ROOTINO; 550 TAILQ_INIT(&chvc->scan_dirents); 551 } else { 552 chfs_readvnode(mp, ino, &vp); 553 } 554 555 mutex_enter(&chmp->chm_lock_mountfields); 556 /* Initialize type specific things. */ 557 switch (ip->ch_type) { 558 case CHT_DIR: 559 /* Read every dirent. */ 560 nref = chvc->dirents; 561 while (nref && 562 (struct chfs_vnode_cache *)nref != chvc) { 563 chfs_readdirent(mp, nref, ip); 564 nref = nref->nref_next; 565 } 566 chfs_set_vnode_size(vp, 512); 567 break; 568 case CHT_REG: 569 /* FALLTHROUGH */ 570 case CHT_SOCK: 571 /* Collect data. */ 572 dbg("read_inode_internal | ino: %llu\n", 573 (unsigned long long)ip->ino); 574 error = chfs_read_inode(chmp, ip); 575 if (error) { 576 vput(vp); 577 *vpp = NULL; 578 mutex_exit(&chmp->chm_lock_mountfields); 579 return (error); 580 } 581 break; 582 case CHT_LNK: 583 /* Collect data. */ 584 dbg("read_inode_internal | ino: %llu\n", 585 (unsigned long long)ip->ino); 586 error = chfs_read_inode_internal(chmp, ip); 587 if (error) { 588 vput(vp); 589 *vpp = NULL; 590 mutex_exit(&chmp->chm_lock_mountfields); 591 return (error); 592 } 593 594 /* Set link. */ 595 dbg("size: %llu\n", (unsigned long long)ip->size); 596 bp = getiobuf(vp, true); 597 bp->b_blkno = 0; 598 bp->b_bufsize = bp->b_resid = 599 bp->b_bcount = ip->size; 600 bp->b_data = kmem_alloc(ip->size, KM_SLEEP); 601 chfs_read_data(chmp, vp, bp); 602 if (!ip->target) 603 ip->target = kmem_alloc(ip->size, 604 KM_SLEEP); 605 memcpy(ip->target, bp->b_data, ip->size); 606 kmem_free(bp->b_data, ip->size); 607 putiobuf(bp); 608 609 break; 610 case CHT_CHR: 611 /* FALLTHROUGH */ 612 case CHT_BLK: 613 /* FALLTHROUGH */ 614 case CHT_FIFO: 615 /* Collect data. */ 616 dbg("read_inode_internal | ino: %llu\n", 617 (unsigned long long)ip->ino); 618 error = chfs_read_inode_internal(chmp, ip); 619 if (error) { 620 vput(vp); 621 *vpp = NULL; 622 mutex_exit(&chmp->chm_lock_mountfields); 623 return (error); 624 } 625 626 /* Set device. */ 627 bp = getiobuf(vp, true); 628 bp->b_blkno = 0; 629 bp->b_bufsize = bp->b_resid = 630 bp->b_bcount = sizeof(dev_t); 631 bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP); 632 chfs_read_data(chmp, vp, bp); 633 memcpy(&ip->rdev, 634 bp->b_data, sizeof(dev_t)); 635 kmem_free(bp->b_data, sizeof(dev_t)); 636 putiobuf(bp); 637 /* Set specific operations. */ 638 if (ip->ch_type == CHT_FIFO) { 639 vp->v_op = chfs_fifoop_p; 640 } else { 641 vp->v_op = chfs_specop_p; 642 spec_node_init(vp, ip->rdev); 643 } 644 645 break; 646 case CHT_BLANK: 647 /* FALLTHROUGH */ 648 case CHT_BAD: 649 break; 650 } 651 mutex_exit(&chmp->chm_lock_mountfields); 652 653 } 654 655 /* Finish inode initalization. */ 656 ip->devvp = ump->um_devvp; 657 vref(ip->devvp); 658 659 uvm_vnp_setsize(vp, ip->size); 660 *vpp = vp; 661 662 return 0; 663 } 664 665 /* --------------------------------------------------------------------- */ 666 667 static int 668 chfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 669 { 670 return ENODEV; 671 } 672 673 /* --------------------------------------------------------------------- */ 674 675 static int 676 chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 677 { 678 return ENODEV; 679 } 680 681 /* --------------------------------------------------------------------- */ 682 683 static int 684 chfs_start(struct mount *mp, int flags) 685 { 686 return 0; 687 } 688 689 /* --------------------------------------------------------------------- */ 690 691 static int 692 chfs_statvfs(struct mount *mp, struct statvfs *sbp) 693 { 694 struct chfs_mount *chmp; 695 struct ufsmount *ump; 696 dbg("statvfs\n"); 697 698 ump = VFSTOUFS(mp); 699 chmp = ump->um_chfs; 700 701 sbp->f_flag = mp->mnt_flag; 702 sbp->f_bsize = chmp->chm_ebh->eb_size; 703 sbp->f_frsize = chmp->chm_ebh->eb_size; 704 sbp->f_iosize = chmp->chm_ebh->eb_size; 705 706 sbp->f_blocks = chmp->chm_ebh->peb_nr; 707 sbp->f_files = 0; 708 sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write; 709 710 sbp->f_bfree = chmp->chm_nr_free_blocks; 711 sbp->f_bresvd = chmp->chm_resv_blocks_write; 712 713 /* FFS specific */ 714 sbp->f_ffree = 0; 715 sbp->f_favail = 0; 716 sbp->f_fresvd = 0; 717 718 copy_statvfs_info(sbp, mp); 719 720 return 0; 721 } 722 723 /* --------------------------------------------------------------------- */ 724 725 static int 726 chfs_sync(struct mount *mp, int waitfor, 727 kauth_cred_t uc) 728 { 729 return 0; 730 } 731 732 /* --------------------------------------------------------------------- */ 733 734 static void 735 chfs_init(void) 736 { 737 /* Initialize pools and inode hash. */ 738 chfs_alloc_pool_caches(); 739 chfs_ihashinit(); 740 pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0, 741 "chfsinopl", &pool_allocator_nointr, IPL_NONE); 742 ufs_init(); 743 } 744 745 /* --------------------------------------------------------------------- */ 746 747 static void 748 chfs_reinit(void) 749 { 750 chfs_ihashreinit(); 751 ufs_reinit(); 752 } 753 754 /* --------------------------------------------------------------------- */ 755 756 static void 757 chfs_done(void) 758 { 759 ufs_done(); 760 chfs_ihashdone(); 761 pool_destroy(&chfs_inode_pool); 762 chfs_destroy_pool_caches(); 763 } 764 765 /* --------------------------------------------------------------------- */ 766 767 static int 768 chfs_snapshot(struct mount *mp, struct vnode *vp, 769 struct timespec *ctime) 770 { 771 return ENODEV; 772 } 773 774 /* --------------------------------------------------------------------- */ 775 776 /* 777 * chfs vfs operations. 778 */ 779 780 extern const struct vnodeopv_desc chfs_fifoop_opv_desc; 781 extern const struct vnodeopv_desc chfs_specop_opv_desc; 782 extern const struct vnodeopv_desc chfs_vnodeop_opv_desc; 783 784 const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = { 785 &chfs_fifoop_opv_desc, 786 &chfs_specop_opv_desc, 787 &chfs_vnodeop_opv_desc, 788 NULL, 789 }; 790 791 struct vfsops chfs_vfsops = { 792 .vfs_name = MOUNT_CHFS, 793 .vfs_min_mount_data = sizeof (struct chfs_args), 794 .vfs_mount = chfs_mount, 795 .vfs_start = chfs_start, 796 .vfs_unmount = chfs_unmount, 797 .vfs_root = chfs_root, 798 .vfs_quotactl = ufs_quotactl, 799 .vfs_statvfs = chfs_statvfs, 800 .vfs_sync = chfs_sync, 801 .vfs_vget = chfs_vget, 802 .vfs_fhtovp = chfs_fhtovp, 803 .vfs_vptofh = chfs_vptofh, 804 .vfs_init = chfs_init, 805 .vfs_reinit = chfs_reinit, 806 .vfs_done = chfs_done, 807 .vfs_snapshot = chfs_snapshot, 808 .vfs_extattrctl = vfs_stdextattrctl, 809 .vfs_suspendctl = (void *)eopnotsupp, 810 .vfs_renamelock_enter = genfs_renamelock_enter, 811 .vfs_renamelock_exit = genfs_renamelock_exit, 812 .vfs_fsync = (void *)eopnotsupp, 813 .vfs_opv_descs = chfs_vnodeopv_descs 814 }; 815 816 /* For using CHFS as a module. */ 817 static int 818 chfs_modcmd(modcmd_t cmd, void *arg) 819 { 820 switch (cmd) { 821 case MODULE_CMD_INIT: 822 return vfs_attach(&chfs_vfsops); 823 case MODULE_CMD_FINI: 824 return vfs_detach(&chfs_vfsops); 825 default: 826 return ENOTTY; 827 } 828 } 829
Indexes created Mon Oct 20 16:09:52 GMT 2025