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 <linux/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_free_inode(struct inode *inode) 75 { 76 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 77 } 78 79 static void 80 spufs_init_once(void *p) 81 { 82 struct spufs_inode_info *ei = p; 83 84 inode_init_once(&ei->vfs_inode); 85 } 86 87 static struct inode * 88 spufs_new_inode(struct super_block *sb, umode_t mode) 89 { 90 struct inode *inode; 91 92 inode = new_inode(sb); 93 if (!inode) 94 goto out; 95 96 inode->i_ino = get_next_ino(); 97 inode->i_mode = mode; 98 inode->i_uid = current_fsuid(); 99 inode->i_gid = current_fsgid(); 100 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 101 out: 102 return inode; 103 } 104 105 static int 106 spufs_setattr(struct dentry *dentry, struct iattr *attr) 107 { 108 struct inode *inode = d_inode(dentry); 109 110 if ((attr->ia_valid & ATTR_SIZE) && 111 (attr->ia_size != inode->i_size)) 112 return -EINVAL; 113 setattr_copy(inode, attr); 114 mark_inode_dirty(inode); 115 return 0; 116 } 117 118 119 static int 120 spufs_new_file(struct super_block *sb, struct dentry *dentry, 121 const struct file_operations *fops, umode_t mode, 122 size_t size, struct spu_context *ctx) 123 { 124 static const struct inode_operations spufs_file_iops = { 125 .setattr = spufs_setattr, 126 }; 127 struct inode *inode; 128 int ret; 129 130 ret = -ENOSPC; 131 inode = spufs_new_inode(sb, S_IFREG | mode); 132 if (!inode) 133 goto out; 134 135 ret = 0; 136 inode->i_op = &spufs_file_iops; 137 inode->i_fop = fops; 138 inode->i_size = size; 139 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 140 d_add(dentry, inode); 141 out: 142 return ret; 143 } 144 145 static void 146 spufs_evict_inode(struct inode *inode) 147 { 148 struct spufs_inode_info *ei = SPUFS_I(inode); 149 clear_inode(inode); 150 if (ei->i_ctx) 151 put_spu_context(ei->i_ctx); 152 if (ei->i_gang) 153 put_spu_gang(ei->i_gang); 154 } 155 156 static void spufs_prune_dir(struct dentry *dir) 157 { 158 struct dentry *dentry, *tmp; 159 160 inode_lock(d_inode(dir)); 161 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) { 162 spin_lock(&dentry->d_lock); 163 if (simple_positive(dentry)) { 164 dget_dlock(dentry); 165 __d_drop(dentry); 166 spin_unlock(&dentry->d_lock); 167 simple_unlink(d_inode(dir), dentry); 168 /* XXX: what was dcache_lock protecting here? Other 169 * filesystems (IB, configfs) release dcache_lock 170 * before unlink */ 171 dput(dentry); 172 } else { 173 spin_unlock(&dentry->d_lock); 174 } 175 } 176 shrink_dcache_parent(dir); 177 inode_unlock(d_inode(dir)); 178 } 179 180 /* Caller must hold parent->i_mutex */ 181 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 182 { 183 /* remove all entries */ 184 int res; 185 spufs_prune_dir(dir); 186 d_drop(dir); 187 res = simple_rmdir(parent, dir); 188 /* We have to give up the mm_struct */ 189 spu_forget(SPUFS_I(d_inode(dir))->i_ctx); 190 return res; 191 } 192 193 static int spufs_fill_dir(struct dentry *dir, 194 const struct spufs_tree_descr *files, umode_t mode, 195 struct spu_context *ctx) 196 { 197 while (files->name && files->name[0]) { 198 int ret; 199 struct dentry *dentry = d_alloc_name(dir, files->name); 200 if (!dentry) 201 return -ENOMEM; 202 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 203 files->mode & mode, files->size, ctx); 204 if (ret) 205 return ret; 206 files++; 207 } 208 return 0; 209 } 210 211 static int spufs_dir_close(struct inode *inode, struct file *file) 212 { 213 struct spu_context *ctx; 214 struct inode *parent; 215 struct dentry *dir; 216 int ret; 217 218 dir = file->f_path.dentry; 219 parent = d_inode(dir->d_parent); 220 ctx = SPUFS_I(d_inode(dir))->i_ctx; 221 222 inode_lock_nested(parent, I_MUTEX_PARENT); 223 ret = spufs_rmdir(parent, dir); 224 inode_unlock(parent); 225 WARN_ON(ret); 226 227 return dcache_dir_close(inode, file); 228 } 229 230 const struct file_operations spufs_context_fops = { 231 .open = dcache_dir_open, 232 .release = spufs_dir_close, 233 .llseek = dcache_dir_lseek, 234 .read = generic_read_dir, 235 .iterate_shared = dcache_readdir, 236 .fsync = noop_fsync, 237 }; 238 EXPORT_SYMBOL_GPL(spufs_context_fops); 239 240 static int 241 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 242 umode_t mode) 243 { 244 int ret; 245 struct inode *inode; 246 struct spu_context *ctx; 247 248 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 249 if (!inode) 250 return -ENOSPC; 251 252 if (dir->i_mode & S_ISGID) { 253 inode->i_gid = dir->i_gid; 254 inode->i_mode &= S_ISGID; 255 } 256 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 257 SPUFS_I(inode)->i_ctx = ctx; 258 if (!ctx) { 259 iput(inode); 260 return -ENOSPC; 261 } 262 263 ctx->flags = flags; 264 inode->i_op = &simple_dir_inode_operations; 265 inode->i_fop = &simple_dir_operations; 266 267 inode_lock(inode); 268 269 dget(dentry); 270 inc_nlink(dir); 271 inc_nlink(inode); 272 273 d_instantiate(dentry, inode); 274 275 if (flags & SPU_CREATE_NOSCHED) 276 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 277 mode, ctx); 278 else 279 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 280 281 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 282 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 283 mode, ctx); 284 285 if (ret) 286 spufs_rmdir(dir, dentry); 287 288 inode_unlock(inode); 289 290 return ret; 291 } 292 293 static int spufs_context_open(struct path *path) 294 { 295 int ret; 296 struct file *filp; 297 298 ret = get_unused_fd_flags(0); 299 if (ret < 0) 300 return ret; 301 302 filp = dentry_open(path, O_RDONLY, current_cred()); 303 if (IS_ERR(filp)) { 304 put_unused_fd(ret); 305 return PTR_ERR(filp); 306 } 307 308 filp->f_op = &spufs_context_fops; 309 fd_install(ret, filp); 310 return ret; 311 } 312 313 static struct spu_context * 314 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 315 struct file *filp) 316 { 317 struct spu_context *tmp, *neighbor, *err; 318 int count, node; 319 int aff_supp; 320 321 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 322 struct spu, cbe_list))->aff_list); 323 324 if (!aff_supp) 325 return ERR_PTR(-EINVAL); 326 327 if (flags & SPU_CREATE_GANG) 328 return ERR_PTR(-EINVAL); 329 330 if (flags & SPU_CREATE_AFFINITY_MEM && 331 gang->aff_ref_ctx && 332 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 333 return ERR_PTR(-EEXIST); 334 335 if (gang->aff_flags & AFF_MERGED) 336 return ERR_PTR(-EBUSY); 337 338 neighbor = NULL; 339 if (flags & SPU_CREATE_AFFINITY_SPU) { 340 if (!filp || filp->f_op != &spufs_context_fops) 341 return ERR_PTR(-EINVAL); 342 343 neighbor = get_spu_context( 344 SPUFS_I(file_inode(filp))->i_ctx); 345 346 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 347 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 348 !list_entry(neighbor->aff_list.next, struct spu_context, 349 aff_list)->aff_head) { 350 err = ERR_PTR(-EEXIST); 351 goto out_put_neighbor; 352 } 353 354 if (gang != neighbor->gang) { 355 err = ERR_PTR(-EINVAL); 356 goto out_put_neighbor; 357 } 358 359 count = 1; 360 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 361 count++; 362 if (list_empty(&neighbor->aff_list)) 363 count++; 364 365 for (node = 0; node < MAX_NUMNODES; node++) { 366 if ((cbe_spu_info[node].n_spus - atomic_read( 367 &cbe_spu_info[node].reserved_spus)) >= count) 368 break; 369 } 370 371 if (node == MAX_NUMNODES) { 372 err = ERR_PTR(-EEXIST); 373 goto out_put_neighbor; 374 } 375 } 376 377 return neighbor; 378 379 out_put_neighbor: 380 put_spu_context(neighbor); 381 return err; 382 } 383 384 static void 385 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 386 struct spu_context *neighbor) 387 { 388 if (flags & SPU_CREATE_AFFINITY_MEM) 389 ctx->gang->aff_ref_ctx = ctx; 390 391 if (flags & SPU_CREATE_AFFINITY_SPU) { 392 if (list_empty(&neighbor->aff_list)) { 393 list_add_tail(&neighbor->aff_list, 394 &ctx->gang->aff_list_head); 395 neighbor->aff_head = 1; 396 } 397 398 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 399 || list_entry(neighbor->aff_list.next, struct spu_context, 400 aff_list)->aff_head) { 401 list_add(&ctx->aff_list, &neighbor->aff_list); 402 } else { 403 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 404 if (neighbor->aff_head) { 405 neighbor->aff_head = 0; 406 ctx->aff_head = 1; 407 } 408 } 409 410 if (!ctx->gang->aff_ref_ctx) 411 ctx->gang->aff_ref_ctx = ctx; 412 } 413 } 414 415 static int 416 spufs_create_context(struct inode *inode, struct dentry *dentry, 417 struct vfsmount *mnt, int flags, umode_t mode, 418 struct file *aff_filp) 419 { 420 int ret; 421 int affinity; 422 struct spu_gang *gang; 423 struct spu_context *neighbor; 424 struct path path = {.mnt = mnt, .dentry = dentry}; 425 426 if ((flags & SPU_CREATE_NOSCHED) && 427 !capable(CAP_SYS_NICE)) 428 return -EPERM; 429 430 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 431 == SPU_CREATE_ISOLATE) 432 return -EINVAL; 433 434 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 435 return -ENODEV; 436 437 gang = NULL; 438 neighbor = NULL; 439 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 440 if (affinity) { 441 gang = SPUFS_I(inode)->i_gang; 442 if (!gang) 443 return -EINVAL; 444 mutex_lock(&gang->aff_mutex); 445 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 446 if (IS_ERR(neighbor)) { 447 ret = PTR_ERR(neighbor); 448 goto out_aff_unlock; 449 } 450 } 451 452 ret = spufs_mkdir(inode, dentry, flags, mode & 0777); 453 if (ret) 454 goto out_aff_unlock; 455 456 if (affinity) { 457 spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, 458 neighbor); 459 if (neighbor) 460 put_spu_context(neighbor); 461 } 462 463 ret = spufs_context_open(&path); 464 if (ret < 0) 465 WARN_ON(spufs_rmdir(inode, dentry)); 466 467 out_aff_unlock: 468 if (affinity) 469 mutex_unlock(&gang->aff_mutex); 470 return ret; 471 } 472 473 static int 474 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 475 { 476 int ret; 477 struct inode *inode; 478 struct spu_gang *gang; 479 480 ret = -ENOSPC; 481 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 482 if (!inode) 483 goto out; 484 485 ret = 0; 486 if (dir->i_mode & S_ISGID) { 487 inode->i_gid = dir->i_gid; 488 inode->i_mode &= S_ISGID; 489 } 490 gang = alloc_spu_gang(); 491 SPUFS_I(inode)->i_ctx = NULL; 492 SPUFS_I(inode)->i_gang = gang; 493 if (!gang) { 494 ret = -ENOMEM; 495 goto out_iput; 496 } 497 498 inode->i_op = &simple_dir_inode_operations; 499 inode->i_fop = &simple_dir_operations; 500 501 d_instantiate(dentry, inode); 502 inc_nlink(dir); 503 inc_nlink(d_inode(dentry)); 504 return ret; 505 506 out_iput: 507 iput(inode); 508 out: 509 return ret; 510 } 511 512 static int spufs_gang_open(struct path *path) 513 { 514 int ret; 515 struct file *filp; 516 517 ret = get_unused_fd_flags(0); 518 if (ret < 0) 519 return ret; 520 521 /* 522 * get references for dget and mntget, will be released 523 * in error path of *_open(). 524 */ 525 filp = dentry_open(path, O_RDONLY, current_cred()); 526 if (IS_ERR(filp)) { 527 put_unused_fd(ret); 528 return PTR_ERR(filp); 529 } 530 531 filp->f_op = &simple_dir_operations; 532 fd_install(ret, filp); 533 return ret; 534 } 535 536 static int spufs_create_gang(struct inode *inode, 537 struct dentry *dentry, 538 struct vfsmount *mnt, umode_t mode) 539 { 540 struct path path = {.mnt = mnt, .dentry = dentry}; 541 int ret; 542 543 ret = spufs_mkgang(inode, dentry, mode & 0777); 544 if (!ret) { 545 ret = spufs_gang_open(&path); 546 if (ret < 0) { 547 int err = simple_rmdir(inode, dentry); 548 WARN_ON(err); 549 } 550 } 551 return ret; 552 } 553 554 555 static struct file_system_type spufs_type; 556 557 long spufs_create(struct path *path, struct dentry *dentry, 558 unsigned int flags, umode_t mode, struct file *filp) 559 { 560 struct inode *dir = d_inode(path->dentry); 561 int ret; 562 563 /* check if we are on spufs */ 564 if (path->dentry->d_sb->s_type != &spufs_type) 565 return -EINVAL; 566 567 /* don't accept undefined flags */ 568 if (flags & (~SPU_CREATE_FLAG_ALL)) 569 return -EINVAL; 570 571 /* only threads can be underneath a gang */ 572 if (path->dentry != path->dentry->d_sb->s_root) 573 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 574 return -EINVAL; 575 576 mode &= ~current_umask(); 577 578 if (flags & SPU_CREATE_GANG) 579 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 580 else 581 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 582 filp); 583 if (ret >= 0) 584 fsnotify_mkdir(dir, dentry); 585 586 return ret; 587 } 588 589 /* File system initialization */ 590 enum { 591 Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, 592 }; 593 594 static const match_table_t spufs_tokens = { 595 { Opt_uid, "uid=%d" }, 596 { Opt_gid, "gid=%d" }, 597 { Opt_mode, "mode=%o" }, 598 { Opt_debug, "debug" }, 599 { Opt_err, NULL }, 600 }; 601 602 static int spufs_show_options(struct seq_file *m, struct dentry *root) 603 { 604 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 605 struct inode *inode = root->d_inode; 606 607 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 608 seq_printf(m, ",uid=%u", 609 from_kuid_munged(&init_user_ns, inode->i_uid)); 610 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 611 seq_printf(m, ",gid=%u", 612 from_kgid_munged(&init_user_ns, inode->i_gid)); 613 if ((inode->i_mode & S_IALLUGO) != 0775) 614 seq_printf(m, ",mode=%o", inode->i_mode); 615 if (sbi->debug) 616 seq_puts(m, ",debug"); 617 return 0; 618 } 619 620 static int 621 spufs_parse_options(struct super_block *sb, char *options, struct inode *root) 622 { 623 char *p; 624 substring_t args[MAX_OPT_ARGS]; 625 626 while ((p = strsep(&options, ",")) != NULL) { 627 int token, option; 628 629 if (!*p) 630 continue; 631 632 token = match_token(p, spufs_tokens, args); 633 switch (token) { 634 case Opt_uid: 635 if (match_int(&args[0], &option)) 636 return 0; 637 root->i_uid = make_kuid(current_user_ns(), option); 638 if (!uid_valid(root->i_uid)) 639 return 0; 640 break; 641 case Opt_gid: 642 if (match_int(&args[0], &option)) 643 return 0; 644 root->i_gid = make_kgid(current_user_ns(), option); 645 if (!gid_valid(root->i_gid)) 646 return 0; 647 break; 648 case Opt_mode: 649 if (match_octal(&args[0], &option)) 650 return 0; 651 root->i_mode = option | S_IFDIR; 652 break; 653 case Opt_debug: 654 spufs_get_sb_info(sb)->debug = 1; 655 break; 656 default: 657 return 0; 658 } 659 } 660 return 1; 661 } 662 663 static void spufs_exit_isolated_loader(void) 664 { 665 free_pages((unsigned long) isolated_loader, 666 get_order(isolated_loader_size)); 667 } 668 669 static void 670 spufs_init_isolated_loader(void) 671 { 672 struct device_node *dn; 673 const char *loader; 674 int size; 675 676 dn = of_find_node_by_path("/spu-isolation"); 677 if (!dn) 678 return; 679 680 loader = of_get_property(dn, "loader", &size); 681 if (!loader) 682 return; 683 684 /* the loader must be align on a 16 byte boundary */ 685 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 686 if (!isolated_loader) 687 return; 688 689 isolated_loader_size = size; 690 memcpy(isolated_loader, loader, size); 691 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 692 } 693 694 static int 695 spufs_create_root(struct super_block *sb, void *data) 696 { 697 struct inode *inode; 698 int ret; 699 700 ret = -ENODEV; 701 if (!spu_management_ops) 702 goto out; 703 704 ret = -ENOMEM; 705 inode = spufs_new_inode(sb, S_IFDIR | 0775); 706 if (!inode) 707 goto out; 708 709 inode->i_op = &simple_dir_inode_operations; 710 inode->i_fop = &simple_dir_operations; 711 SPUFS_I(inode)->i_ctx = NULL; 712 inc_nlink(inode); 713 714 ret = -EINVAL; 715 if (!spufs_parse_options(sb, data, inode)) 716 goto out_iput; 717 718 ret = -ENOMEM; 719 sb->s_root = d_make_root(inode); 720 if (!sb->s_root) 721 goto out; 722 723 return 0; 724 out_iput: 725 iput(inode); 726 out: 727 return ret; 728 } 729 730 static int 731 spufs_fill_super(struct super_block *sb, void *data, int silent) 732 { 733 struct spufs_sb_info *info; 734 static const struct super_operations s_ops = { 735 .alloc_inode = spufs_alloc_inode, 736 .free_inode = spufs_free_inode, 737 .statfs = simple_statfs, 738 .evict_inode = spufs_evict_inode, 739 .show_options = spufs_show_options, 740 }; 741 742 info = kzalloc(sizeof(*info), GFP_KERNEL); 743 if (!info) 744 return -ENOMEM; 745 746 sb->s_maxbytes = MAX_LFS_FILESIZE; 747 sb->s_blocksize = PAGE_SIZE; 748 sb->s_blocksize_bits = PAGE_SHIFT; 749 sb->s_magic = SPUFS_MAGIC; 750 sb->s_op = &s_ops; 751 sb->s_fs_info = info; 752 753 return spufs_create_root(sb, data); 754 } 755 756 static struct dentry * 757 spufs_mount(struct file_system_type *fstype, int flags, 758 const char *name, void *data) 759 { 760 return mount_single(fstype, flags, data, spufs_fill_super); 761 } 762 763 static struct file_system_type spufs_type = { 764 .owner = THIS_MODULE, 765 .name = "spufs", 766 .mount = spufs_mount, 767 .kill_sb = kill_litter_super, 768 }; 769 MODULE_ALIAS_FS("spufs"); 770 771 static int __init spufs_init(void) 772 { 773 int ret; 774 775 ret = -ENODEV; 776 if (!spu_management_ops) 777 goto out; 778 779 ret = -ENOMEM; 780 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 781 sizeof(struct spufs_inode_info), 0, 782 SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); 783 784 if (!spufs_inode_cache) 785 goto out; 786 ret = spu_sched_init(); 787 if (ret) 788 goto out_cache; 789 ret = register_spu_syscalls(&spufs_calls); 790 if (ret) 791 goto out_sched; 792 ret = register_filesystem(&spufs_type); 793 if (ret) 794 goto out_syscalls; 795 796 spufs_init_isolated_loader(); 797 798 return 0; 799 800 out_syscalls: 801 unregister_spu_syscalls(&spufs_calls); 802 out_sched: 803 spu_sched_exit(); 804 out_cache: 805 kmem_cache_destroy(spufs_inode_cache); 806 out: 807 return ret; 808 } 809 module_init(spufs_init); 810 811 static void __exit spufs_exit(void) 812 { 813 spu_sched_exit(); 814 spufs_exit_isolated_loader(); 815 unregister_spu_syscalls(&spufs_calls); 816 unregister_filesystem(&spufs_type); 817 kmem_cache_destroy(spufs_inode_cache); 818 } 819 module_exit(spufs_exit); 820 821 MODULE_LICENSE("GPL"); 822 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 823 824