1 2 /* 3 * SPU file system 4 * 5 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 6 * 7 * Author: Arnd Bergmann <arndb@de.ibm.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 */ 23 24 #include <linux/file.h> 25 #include <linux/fs.h> 26 #include <linux/fsnotify.h> 27 #include <linux/backing-dev.h> 28 #include <linux/init.h> 29 #include <linux/ioctl.h> 30 #include <linux/module.h> 31 #include <linux/mount.h> 32 #include <linux/namei.h> 33 #include <linux/pagemap.h> 34 #include <linux/poll.h> 35 #include <linux/slab.h> 36 #include <linux/parser.h> 37 38 #include <asm/prom.h> 39 #include <asm/spu.h> 40 #include <asm/spu_priv1.h> 41 #include <asm/uaccess.h> 42 43 #include "spufs.h" 44 45 struct spufs_sb_info { 46 int debug; 47 }; 48 49 static struct kmem_cache *spufs_inode_cache; 50 char *isolated_loader; 51 static int isolated_loader_size; 52 53 static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) 54 { 55 return sb->s_fs_info; 56 } 57 58 static struct inode * 59 spufs_alloc_inode(struct super_block *sb) 60 { 61 struct spufs_inode_info *ei; 62 63 ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 64 if (!ei) 65 return NULL; 66 67 ei->i_gang = NULL; 68 ei->i_ctx = NULL; 69 ei->i_openers = 0; 70 71 return &ei->vfs_inode; 72 } 73 74 static void spufs_i_callback(struct rcu_head *head) 75 { 76 struct inode *inode = container_of(head, struct inode, i_rcu); 77 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 78 } 79 80 static void spufs_destroy_inode(struct inode *inode) 81 { 82 call_rcu(&inode->i_rcu, spufs_i_callback); 83 } 84 85 static void 86 spufs_init_once(void *p) 87 { 88 struct spufs_inode_info *ei = p; 89 90 inode_init_once(&ei->vfs_inode); 91 } 92 93 static struct inode * 94 spufs_new_inode(struct super_block *sb, umode_t mode) 95 { 96 struct inode *inode; 97 98 inode = new_inode(sb); 99 if (!inode) 100 goto out; 101 102 inode->i_mode = mode; 103 inode->i_uid = current_fsuid(); 104 inode->i_gid = current_fsgid(); 105 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 106 out: 107 return inode; 108 } 109 110 static int 111 spufs_setattr(struct dentry *dentry, struct iattr *attr) 112 { 113 struct inode *inode = dentry->d_inode; 114 115 if ((attr->ia_valid & ATTR_SIZE) && 116 (attr->ia_size != inode->i_size)) 117 return -EINVAL; 118 setattr_copy(inode, attr); 119 mark_inode_dirty(inode); 120 return 0; 121 } 122 123 124 static int 125 spufs_new_file(struct super_block *sb, struct dentry *dentry, 126 const struct file_operations *fops, umode_t mode, 127 size_t size, struct spu_context *ctx) 128 { 129 static const struct inode_operations spufs_file_iops = { 130 .setattr = spufs_setattr, 131 }; 132 struct inode *inode; 133 int ret; 134 135 ret = -ENOSPC; 136 inode = spufs_new_inode(sb, S_IFREG | mode); 137 if (!inode) 138 goto out; 139 140 ret = 0; 141 inode->i_op = &spufs_file_iops; 142 inode->i_fop = fops; 143 inode->i_size = size; 144 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 145 d_add(dentry, inode); 146 out: 147 return ret; 148 } 149 150 static void 151 spufs_evict_inode(struct inode *inode) 152 { 153 struct spufs_inode_info *ei = SPUFS_I(inode); 154 clear_inode(inode); 155 if (ei->i_ctx) 156 put_spu_context(ei->i_ctx); 157 if (ei->i_gang) 158 put_spu_gang(ei->i_gang); 159 } 160 161 static void spufs_prune_dir(struct dentry *dir) 162 { 163 struct dentry *dentry, *tmp; 164 165 mutex_lock(&dir->d_inode->i_mutex); 166 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 167 spin_lock(&dentry->d_lock); 168 if (!(d_unhashed(dentry)) && dentry->d_inode) { 169 dget_dlock(dentry); 170 __d_drop(dentry); 171 spin_unlock(&dentry->d_lock); 172 simple_unlink(dir->d_inode, dentry); 173 /* XXX: what was dcache_lock protecting here? Other 174 * filesystems (IB, configfs) release dcache_lock 175 * before unlink */ 176 dput(dentry); 177 } else { 178 spin_unlock(&dentry->d_lock); 179 } 180 } 181 shrink_dcache_parent(dir); 182 mutex_unlock(&dir->d_inode->i_mutex); 183 } 184 185 /* Caller must hold parent->i_mutex */ 186 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 187 { 188 /* remove all entries */ 189 int res; 190 spufs_prune_dir(dir); 191 d_drop(dir); 192 res = simple_rmdir(parent, dir); 193 /* We have to give up the mm_struct */ 194 spu_forget(SPUFS_I(dir->d_inode)->i_ctx); 195 return res; 196 } 197 198 static int spufs_fill_dir(struct dentry *dir, 199 const struct spufs_tree_descr *files, umode_t mode, 200 struct spu_context *ctx) 201 { 202 struct dentry *dentry, *tmp; 203 int ret; 204 205 while (files->name && files->name[0]) { 206 ret = -ENOMEM; 207 dentry = d_alloc_name(dir, files->name); 208 if (!dentry) 209 goto out; 210 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 211 files->mode & mode, files->size, ctx); 212 if (ret) 213 goto out; 214 files++; 215 } 216 return 0; 217 out: 218 /* 219 * remove all children from dir. dir->inode is not set so don't 220 * just simply use spufs_prune_dir() and panic afterwards :) 221 * dput() looks like it will do the right thing: 222 * - dec parent's ref counter 223 * - remove child from parent's child list 224 * - free child's inode if possible 225 * - free child 226 */ 227 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 228 dput(dentry); 229 } 230 231 shrink_dcache_parent(dir); 232 return ret; 233 } 234 235 static int spufs_dir_close(struct inode *inode, struct file *file) 236 { 237 struct spu_context *ctx; 238 struct inode *parent; 239 struct dentry *dir; 240 int ret; 241 242 dir = file->f_path.dentry; 243 parent = dir->d_parent->d_inode; 244 ctx = SPUFS_I(dir->d_inode)->i_ctx; 245 246 mutex_lock_nested(&parent->i_mutex, I_MUTEX_PARENT); 247 ret = spufs_rmdir(parent, dir); 248 mutex_unlock(&parent->i_mutex); 249 WARN_ON(ret); 250 251 return dcache_dir_close(inode, file); 252 } 253 254 const struct file_operations spufs_context_fops = { 255 .open = dcache_dir_open, 256 .release = spufs_dir_close, 257 .llseek = dcache_dir_lseek, 258 .read = generic_read_dir, 259 .readdir = dcache_readdir, 260 .fsync = noop_fsync, 261 }; 262 EXPORT_SYMBOL_GPL(spufs_context_fops); 263 264 static int 265 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 266 umode_t mode) 267 { 268 int ret; 269 struct inode *inode; 270 struct spu_context *ctx; 271 272 ret = -ENOSPC; 273 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 274 if (!inode) 275 goto out; 276 277 if (dir->i_mode & S_ISGID) { 278 inode->i_gid = dir->i_gid; 279 inode->i_mode &= S_ISGID; 280 } 281 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 282 SPUFS_I(inode)->i_ctx = ctx; 283 if (!ctx) 284 goto out_iput; 285 286 ctx->flags = flags; 287 inode->i_op = &simple_dir_inode_operations; 288 inode->i_fop = &simple_dir_operations; 289 if (flags & SPU_CREATE_NOSCHED) 290 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 291 mode, ctx); 292 else 293 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 294 295 if (ret) 296 goto out_free_ctx; 297 298 if (spufs_get_sb_info(dir->i_sb)->debug) 299 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 300 mode, ctx); 301 302 if (ret) 303 goto out_free_ctx; 304 305 d_instantiate(dentry, inode); 306 dget(dentry); 307 inc_nlink(dir); 308 inc_nlink(dentry->d_inode); 309 goto out; 310 311 out_free_ctx: 312 spu_forget(ctx); 313 put_spu_context(ctx); 314 out_iput: 315 iput(inode); 316 out: 317 return ret; 318 } 319 320 static int spufs_context_open(struct path *path) 321 { 322 int ret; 323 struct file *filp; 324 325 ret = get_unused_fd(); 326 if (ret < 0) 327 return ret; 328 329 filp = dentry_open(path, O_RDONLY, current_cred()); 330 if (IS_ERR(filp)) { 331 put_unused_fd(ret); 332 return PTR_ERR(filp); 333 } 334 335 filp->f_op = &spufs_context_fops; 336 fd_install(ret, filp); 337 return ret; 338 } 339 340 static struct spu_context * 341 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 342 struct file *filp) 343 { 344 struct spu_context *tmp, *neighbor, *err; 345 int count, node; 346 int aff_supp; 347 348 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 349 struct spu, cbe_list))->aff_list); 350 351 if (!aff_supp) 352 return ERR_PTR(-EINVAL); 353 354 if (flags & SPU_CREATE_GANG) 355 return ERR_PTR(-EINVAL); 356 357 if (flags & SPU_CREATE_AFFINITY_MEM && 358 gang->aff_ref_ctx && 359 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 360 return ERR_PTR(-EEXIST); 361 362 if (gang->aff_flags & AFF_MERGED) 363 return ERR_PTR(-EBUSY); 364 365 neighbor = NULL; 366 if (flags & SPU_CREATE_AFFINITY_SPU) { 367 if (!filp || filp->f_op != &spufs_context_fops) 368 return ERR_PTR(-EINVAL); 369 370 neighbor = get_spu_context( 371 SPUFS_I(filp->f_dentry->d_inode)->i_ctx); 372 373 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 374 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 375 !list_entry(neighbor->aff_list.next, struct spu_context, 376 aff_list)->aff_head) { 377 err = ERR_PTR(-EEXIST); 378 goto out_put_neighbor; 379 } 380 381 if (gang != neighbor->gang) { 382 err = ERR_PTR(-EINVAL); 383 goto out_put_neighbor; 384 } 385 386 count = 1; 387 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 388 count++; 389 if (list_empty(&neighbor->aff_list)) 390 count++; 391 392 for (node = 0; node < MAX_NUMNODES; node++) { 393 if ((cbe_spu_info[node].n_spus - atomic_read( 394 &cbe_spu_info[node].reserved_spus)) >= count) 395 break; 396 } 397 398 if (node == MAX_NUMNODES) { 399 err = ERR_PTR(-EEXIST); 400 goto out_put_neighbor; 401 } 402 } 403 404 return neighbor; 405 406 out_put_neighbor: 407 put_spu_context(neighbor); 408 return err; 409 } 410 411 static void 412 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 413 struct spu_context *neighbor) 414 { 415 if (flags & SPU_CREATE_AFFINITY_MEM) 416 ctx->gang->aff_ref_ctx = ctx; 417 418 if (flags & SPU_CREATE_AFFINITY_SPU) { 419 if (list_empty(&neighbor->aff_list)) { 420 list_add_tail(&neighbor->aff_list, 421 &ctx->gang->aff_list_head); 422 neighbor->aff_head = 1; 423 } 424 425 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 426 || list_entry(neighbor->aff_list.next, struct spu_context, 427 aff_list)->aff_head) { 428 list_add(&ctx->aff_list, &neighbor->aff_list); 429 } else { 430 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 431 if (neighbor->aff_head) { 432 neighbor->aff_head = 0; 433 ctx->aff_head = 1; 434 } 435 } 436 437 if (!ctx->gang->aff_ref_ctx) 438 ctx->gang->aff_ref_ctx = ctx; 439 } 440 } 441 442 static int 443 spufs_create_context(struct inode *inode, struct dentry *dentry, 444 struct vfsmount *mnt, int flags, umode_t mode, 445 struct file *aff_filp) 446 { 447 int ret; 448 int affinity; 449 struct spu_gang *gang; 450 struct spu_context *neighbor; 451 struct path path = {.mnt = mnt, .dentry = dentry}; 452 453 if ((flags & SPU_CREATE_NOSCHED) && 454 !capable(CAP_SYS_NICE)) 455 return -EPERM; 456 457 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 458 == SPU_CREATE_ISOLATE) 459 return -EINVAL; 460 461 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 462 return -ENODEV; 463 464 gang = NULL; 465 neighbor = NULL; 466 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 467 if (affinity) { 468 gang = SPUFS_I(inode)->i_gang; 469 if (!gang) 470 return -EINVAL; 471 mutex_lock(&gang->aff_mutex); 472 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 473 if (IS_ERR(neighbor)) { 474 ret = PTR_ERR(neighbor); 475 goto out_aff_unlock; 476 } 477 } 478 479 ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 480 if (ret) 481 goto out_aff_unlock; 482 483 if (affinity) { 484 spufs_set_affinity(flags, SPUFS_I(dentry->d_inode)->i_ctx, 485 neighbor); 486 if (neighbor) 487 put_spu_context(neighbor); 488 } 489 490 ret = spufs_context_open(&path); 491 if (ret < 0) 492 WARN_ON(spufs_rmdir(inode, dentry)); 493 494 out_aff_unlock: 495 if (affinity) 496 mutex_unlock(&gang->aff_mutex); 497 return ret; 498 } 499 500 static int 501 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 502 { 503 int ret; 504 struct inode *inode; 505 struct spu_gang *gang; 506 507 ret = -ENOSPC; 508 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 509 if (!inode) 510 goto out; 511 512 ret = 0; 513 if (dir->i_mode & S_ISGID) { 514 inode->i_gid = dir->i_gid; 515 inode->i_mode &= S_ISGID; 516 } 517 gang = alloc_spu_gang(); 518 SPUFS_I(inode)->i_ctx = NULL; 519 SPUFS_I(inode)->i_gang = gang; 520 if (!gang) 521 goto out_iput; 522 523 inode->i_op = &simple_dir_inode_operations; 524 inode->i_fop = &simple_dir_operations; 525 526 d_instantiate(dentry, inode); 527 inc_nlink(dir); 528 inc_nlink(dentry->d_inode); 529 return ret; 530 531 out_iput: 532 iput(inode); 533 out: 534 return ret; 535 } 536 537 static int spufs_gang_open(struct path *path) 538 { 539 int ret; 540 struct file *filp; 541 542 ret = get_unused_fd(); 543 if (ret < 0) 544 return ret; 545 546 /* 547 * get references for dget and mntget, will be released 548 * in error path of *_open(). 549 */ 550 filp = dentry_open(path, O_RDONLY, current_cred()); 551 if (IS_ERR(filp)) { 552 put_unused_fd(ret); 553 return PTR_ERR(filp); 554 } 555 556 filp->f_op = &simple_dir_operations; 557 fd_install(ret, filp); 558 return ret; 559 } 560 561 static int spufs_create_gang(struct inode *inode, 562 struct dentry *dentry, 563 struct vfsmount *mnt, umode_t mode) 564 { 565 struct path path = {.mnt = mnt, .dentry = dentry}; 566 int ret; 567 568 ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); 569 if (!ret) { 570 ret = spufs_gang_open(&path); 571 if (ret < 0) { 572 int err = simple_rmdir(inode, dentry); 573 WARN_ON(err); 574 } 575 } 576 return ret; 577 } 578 579 580 static struct file_system_type spufs_type; 581 582 long spufs_create(struct path *path, struct dentry *dentry, 583 unsigned int flags, umode_t mode, struct file *filp) 584 { 585 struct inode *dir = path->dentry->d_inode; 586 int ret; 587 588 /* check if we are on spufs */ 589 if (path->dentry->d_sb->s_type != &spufs_type) 590 return -EINVAL; 591 592 /* don't accept undefined flags */ 593 if (flags & (~SPU_CREATE_FLAG_ALL)) 594 return -EINVAL; 595 596 /* only threads can be underneath a gang */ 597 if (path->dentry != path->dentry->d_sb->s_root) 598 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 599 return -EINVAL; 600 601 mode &= ~current_umask(); 602 603 if (flags & SPU_CREATE_GANG) 604 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 605 else 606 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 607 filp); 608 if (ret >= 0) 609 fsnotify_mkdir(dir, dentry); 610 611 return ret; 612 } 613 614 /* File system initialization */ 615 enum { 616 Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, 617 }; 618 619 static const match_table_t spufs_tokens = { 620 { Opt_uid, "uid=%d" }, 621 { Opt_gid, "gid=%d" }, 622 { Opt_mode, "mode=%o" }, 623 { Opt_debug, "debug" }, 624 { Opt_err, NULL }, 625 }; 626 627 static int 628 spufs_parse_options(struct super_block *sb, char *options, struct inode *root) 629 { 630 char *p; 631 substring_t args[MAX_OPT_ARGS]; 632 633 while ((p = strsep(&options, ",")) != NULL) { 634 int token, option; 635 636 if (!*p) 637 continue; 638 639 token = match_token(p, spufs_tokens, args); 640 switch (token) { 641 case Opt_uid: 642 if (match_int(&args[0], &option)) 643 return 0; 644 root->i_uid = option; 645 break; 646 case Opt_gid: 647 if (match_int(&args[0], &option)) 648 return 0; 649 root->i_gid = option; 650 break; 651 case Opt_mode: 652 if (match_octal(&args[0], &option)) 653 return 0; 654 root->i_mode = option | S_IFDIR; 655 break; 656 case Opt_debug: 657 spufs_get_sb_info(sb)->debug = 1; 658 break; 659 default: 660 return 0; 661 } 662 } 663 return 1; 664 } 665 666 static void spufs_exit_isolated_loader(void) 667 { 668 free_pages((unsigned long) isolated_loader, 669 get_order(isolated_loader_size)); 670 } 671 672 static void 673 spufs_init_isolated_loader(void) 674 { 675 struct device_node *dn; 676 const char *loader; 677 int size; 678 679 dn = of_find_node_by_path("/spu-isolation"); 680 if (!dn) 681 return; 682 683 loader = of_get_property(dn, "loader", &size); 684 if (!loader) 685 return; 686 687 /* the loader must be align on a 16 byte boundary */ 688 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 689 if (!isolated_loader) 690 return; 691 692 isolated_loader_size = size; 693 memcpy(isolated_loader, loader, size); 694 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 695 } 696 697 static int 698 spufs_create_root(struct super_block *sb, void *data) 699 { 700 struct inode *inode; 701 int ret; 702 703 ret = -ENODEV; 704 if (!spu_management_ops) 705 goto out; 706 707 ret = -ENOMEM; 708 inode = spufs_new_inode(sb, S_IFDIR | 0775); 709 if (!inode) 710 goto out; 711 712 inode->i_op = &simple_dir_inode_operations; 713 inode->i_fop = &simple_dir_operations; 714 SPUFS_I(inode)->i_ctx = NULL; 715 inc_nlink(inode); 716 717 ret = -EINVAL; 718 if (!spufs_parse_options(sb, data, inode)) 719 goto out_iput; 720 721 ret = -ENOMEM; 722 sb->s_root = d_make_root(inode); 723 if (!sb->s_root) 724 goto out; 725 726 return 0; 727 out_iput: 728 iput(inode); 729 out: 730 return ret; 731 } 732 733 static int 734 spufs_fill_super(struct super_block *sb, void *data, int silent) 735 { 736 struct spufs_sb_info *info; 737 static const struct super_operations s_ops = { 738 .alloc_inode = spufs_alloc_inode, 739 .destroy_inode = spufs_destroy_inode, 740 .statfs = simple_statfs, 741 .evict_inode = spufs_evict_inode, 742 .show_options = generic_show_options, 743 }; 744 745 save_mount_options(sb, data); 746 747 info = kzalloc(sizeof(*info), GFP_KERNEL); 748 if (!info) 749 return -ENOMEM; 750 751 sb->s_maxbytes = MAX_LFS_FILESIZE; 752 sb->s_blocksize = PAGE_CACHE_SIZE; 753 sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 754 sb->s_magic = SPUFS_MAGIC; 755 sb->s_op = &s_ops; 756 sb->s_fs_info = info; 757 758 return spufs_create_root(sb, data); 759 } 760 761 static struct dentry * 762 spufs_mount(struct file_system_type *fstype, int flags, 763 const char *name, void *data) 764 { 765 return mount_single(fstype, flags, data, spufs_fill_super); 766 } 767 768 static struct file_system_type spufs_type = { 769 .owner = THIS_MODULE, 770 .name = "spufs", 771 .mount = spufs_mount, 772 .kill_sb = kill_litter_super, 773 }; 774 775 static int __init spufs_init(void) 776 { 777 int ret; 778 779 ret = -ENODEV; 780 if (!spu_management_ops) 781 goto out; 782 783 ret = -ENOMEM; 784 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 785 sizeof(struct spufs_inode_info), 0, 786 SLAB_HWCACHE_ALIGN, spufs_init_once); 787 788 if (!spufs_inode_cache) 789 goto out; 790 ret = spu_sched_init(); 791 if (ret) 792 goto out_cache; 793 ret = register_spu_syscalls(&spufs_calls); 794 if (ret) 795 goto out_sched; 796 ret = register_filesystem(&spufs_type); 797 if (ret) 798 goto out_syscalls; 799 800 spufs_init_isolated_loader(); 801 802 return 0; 803 804 out_syscalls: 805 unregister_spu_syscalls(&spufs_calls); 806 out_sched: 807 spu_sched_exit(); 808 out_cache: 809 kmem_cache_destroy(spufs_inode_cache); 810 out: 811 return ret; 812 } 813 module_init(spufs_init); 814 815 static void __exit spufs_exit(void) 816 { 817 spu_sched_exit(); 818 spufs_exit_isolated_loader(); 819 unregister_spu_syscalls(&spufs_calls); 820 unregister_filesystem(&spufs_type); 821 kmem_cache_destroy(spufs_inode_cache); 822 } 823 module_exit(spufs_exit); 824 825 MODULE_LICENSE("GPL"); 826 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 827 828