1 // SPDX-License-Identifier: GPL-2.0-or-later 2 3 /* 4 * SPU file system 5 * 6 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 7 * 8 * Author: Arnd Bergmann <arndb@de.ibm.com> 9 */ 10 11 #include <linux/file.h> 12 #include <linux/fs.h> 13 #include <linux/fs_context.h> 14 #include <linux/fs_parser.h> 15 #include <linux/fsnotify.h> 16 #include <linux/backing-dev.h> 17 #include <linux/init.h> 18 #include <linux/ioctl.h> 19 #include <linux/module.h> 20 #include <linux/mount.h> 21 #include <linux/namei.h> 22 #include <linux/pagemap.h> 23 #include <linux/poll.h> 24 #include <linux/of.h> 25 #include <linux/seq_file.h> 26 #include <linux/slab.h> 27 28 #include <asm/spu.h> 29 #include <asm/spu_priv1.h> 30 #include <linux/uaccess.h> 31 32 #include "spufs.h" 33 34 struct spufs_sb_info { 35 bool debug; 36 }; 37 38 static struct kmem_cache *spufs_inode_cache; 39 char *isolated_loader; 40 static int isolated_loader_size; 41 42 static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) 43 { 44 return sb->s_fs_info; 45 } 46 47 static struct inode * 48 spufs_alloc_inode(struct super_block *sb) 49 { 50 struct spufs_inode_info *ei; 51 52 ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 53 if (!ei) 54 return NULL; 55 56 ei->i_gang = NULL; 57 ei->i_ctx = NULL; 58 ei->i_openers = 0; 59 60 return &ei->vfs_inode; 61 } 62 63 static void spufs_free_inode(struct inode *inode) 64 { 65 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 66 } 67 68 static void 69 spufs_init_once(void *p) 70 { 71 struct spufs_inode_info *ei = p; 72 73 inode_init_once(&ei->vfs_inode); 74 } 75 76 static struct inode * 77 spufs_new_inode(struct super_block *sb, umode_t mode) 78 { 79 struct inode *inode; 80 81 inode = new_inode(sb); 82 if (!inode) 83 goto out; 84 85 inode->i_ino = get_next_ino(); 86 inode->i_mode = mode; 87 inode->i_uid = current_fsuid(); 88 inode->i_gid = current_fsgid(); 89 simple_inode_init_ts(inode); 90 out: 91 return inode; 92 } 93 94 static int 95 spufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 96 struct iattr *attr) 97 { 98 struct inode *inode = d_inode(dentry); 99 100 if ((attr->ia_valid & ATTR_SIZE) && 101 (attr->ia_size != inode->i_size)) 102 return -EINVAL; 103 setattr_copy(&nop_mnt_idmap, inode, attr); 104 mark_inode_dirty(inode); 105 return 0; 106 } 107 108 109 static int 110 spufs_new_file(struct super_block *sb, struct dentry *dentry, 111 const struct file_operations *fops, umode_t mode, 112 size_t size, struct spu_context *ctx) 113 { 114 static const struct inode_operations spufs_file_iops = { 115 .setattr = spufs_setattr, 116 }; 117 struct inode *inode; 118 int ret; 119 120 ret = -ENOSPC; 121 inode = spufs_new_inode(sb, S_IFREG | mode); 122 if (!inode) 123 goto out; 124 125 ret = 0; 126 inode->i_op = &spufs_file_iops; 127 inode->i_fop = fops; 128 inode->i_size = size; 129 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 130 d_add(dentry, inode); 131 out: 132 return ret; 133 } 134 135 static void 136 spufs_evict_inode(struct inode *inode) 137 { 138 struct spufs_inode_info *ei = SPUFS_I(inode); 139 clear_inode(inode); 140 if (ei->i_ctx) 141 put_spu_context(ei->i_ctx); 142 if (ei->i_gang) 143 put_spu_gang(ei->i_gang); 144 } 145 146 static void spufs_prune_dir(struct dentry *dir) 147 { 148 struct dentry *dentry; 149 struct hlist_node *n; 150 151 inode_lock(d_inode(dir)); 152 hlist_for_each_entry_safe(dentry, n, &dir->d_children, d_sib) { 153 spin_lock(&dentry->d_lock); 154 if (simple_positive(dentry)) { 155 dget_dlock(dentry); 156 __d_drop(dentry); 157 spin_unlock(&dentry->d_lock); 158 simple_unlink(d_inode(dir), dentry); 159 /* XXX: what was dcache_lock protecting here? Other 160 * filesystems (IB, configfs) release dcache_lock 161 * before unlink */ 162 dput(dentry); 163 } else { 164 spin_unlock(&dentry->d_lock); 165 } 166 } 167 shrink_dcache_parent(dir); 168 inode_unlock(d_inode(dir)); 169 } 170 171 /* Caller must hold parent->i_mutex */ 172 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 173 { 174 /* remove all entries */ 175 int res; 176 spufs_prune_dir(dir); 177 d_drop(dir); 178 res = simple_rmdir(parent, dir); 179 /* We have to give up the mm_struct */ 180 spu_forget(SPUFS_I(d_inode(dir))->i_ctx); 181 return res; 182 } 183 184 static int spufs_fill_dir(struct dentry *dir, 185 const struct spufs_tree_descr *files, umode_t mode, 186 struct spu_context *ctx) 187 { 188 while (files->name && files->name[0]) { 189 int ret; 190 struct dentry *dentry = d_alloc_name(dir, files->name); 191 if (!dentry) 192 return -ENOMEM; 193 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 194 files->mode & mode, files->size, ctx); 195 if (ret) 196 return ret; 197 files++; 198 } 199 return 0; 200 } 201 202 static int spufs_dir_close(struct inode *inode, struct file *file) 203 { 204 struct inode *parent; 205 struct dentry *dir; 206 int ret; 207 208 dir = file->f_path.dentry; 209 parent = d_inode(dir->d_parent); 210 211 inode_lock_nested(parent, I_MUTEX_PARENT); 212 ret = spufs_rmdir(parent, dir); 213 inode_unlock(parent); 214 WARN_ON(ret); 215 216 return dcache_dir_close(inode, file); 217 } 218 219 const struct file_operations spufs_context_fops = { 220 .open = dcache_dir_open, 221 .release = spufs_dir_close, 222 .llseek = dcache_dir_lseek, 223 .read = generic_read_dir, 224 .iterate_shared = dcache_readdir, 225 .fsync = noop_fsync, 226 }; 227 EXPORT_SYMBOL_GPL(spufs_context_fops); 228 229 static int 230 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 231 umode_t mode) 232 { 233 int ret; 234 struct inode *inode; 235 struct spu_context *ctx; 236 237 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 238 if (!inode) 239 return -ENOSPC; 240 241 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 242 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 243 SPUFS_I(inode)->i_ctx = ctx; 244 if (!ctx) { 245 iput(inode); 246 return -ENOSPC; 247 } 248 249 ctx->flags = flags; 250 inode->i_op = &simple_dir_inode_operations; 251 inode->i_fop = &simple_dir_operations; 252 253 inode_lock(inode); 254 255 dget(dentry); 256 inc_nlink(dir); 257 inc_nlink(inode); 258 259 d_instantiate(dentry, inode); 260 261 if (flags & SPU_CREATE_NOSCHED) 262 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 263 mode, ctx); 264 else 265 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 266 267 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 268 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 269 mode, ctx); 270 271 if (ret) 272 spufs_rmdir(dir, dentry); 273 274 inode_unlock(inode); 275 276 return ret; 277 } 278 279 static int spufs_context_open(const struct path *path) 280 { 281 int ret; 282 struct file *filp; 283 284 ret = get_unused_fd_flags(0); 285 if (ret < 0) 286 return ret; 287 288 filp = dentry_open(path, O_RDONLY, current_cred()); 289 if (IS_ERR(filp)) { 290 put_unused_fd(ret); 291 return PTR_ERR(filp); 292 } 293 294 filp->f_op = &spufs_context_fops; 295 fd_install(ret, filp); 296 return ret; 297 } 298 299 static struct spu_context * 300 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 301 struct file *filp) 302 { 303 struct spu_context *tmp, *neighbor, *err; 304 int count, node; 305 int aff_supp; 306 307 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 308 struct spu, cbe_list))->aff_list); 309 310 if (!aff_supp) 311 return ERR_PTR(-EINVAL); 312 313 if (flags & SPU_CREATE_GANG) 314 return ERR_PTR(-EINVAL); 315 316 if (flags & SPU_CREATE_AFFINITY_MEM && 317 gang->aff_ref_ctx && 318 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 319 return ERR_PTR(-EEXIST); 320 321 if (gang->aff_flags & AFF_MERGED) 322 return ERR_PTR(-EBUSY); 323 324 neighbor = NULL; 325 if (flags & SPU_CREATE_AFFINITY_SPU) { 326 if (!filp || filp->f_op != &spufs_context_fops) 327 return ERR_PTR(-EINVAL); 328 329 neighbor = get_spu_context( 330 SPUFS_I(file_inode(filp))->i_ctx); 331 332 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 333 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 334 !list_entry(neighbor->aff_list.next, struct spu_context, 335 aff_list)->aff_head) { 336 err = ERR_PTR(-EEXIST); 337 goto out_put_neighbor; 338 } 339 340 if (gang != neighbor->gang) { 341 err = ERR_PTR(-EINVAL); 342 goto out_put_neighbor; 343 } 344 345 count = 1; 346 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 347 count++; 348 if (list_empty(&neighbor->aff_list)) 349 count++; 350 351 for (node = 0; node < MAX_NUMNODES; node++) { 352 if ((cbe_spu_info[node].n_spus - atomic_read( 353 &cbe_spu_info[node].reserved_spus)) >= count) 354 break; 355 } 356 357 if (node == MAX_NUMNODES) { 358 err = ERR_PTR(-EEXIST); 359 goto out_put_neighbor; 360 } 361 } 362 363 return neighbor; 364 365 out_put_neighbor: 366 put_spu_context(neighbor); 367 return err; 368 } 369 370 static void 371 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 372 struct spu_context *neighbor) 373 { 374 if (flags & SPU_CREATE_AFFINITY_MEM) 375 ctx->gang->aff_ref_ctx = ctx; 376 377 if (flags & SPU_CREATE_AFFINITY_SPU) { 378 if (list_empty(&neighbor->aff_list)) { 379 list_add_tail(&neighbor->aff_list, 380 &ctx->gang->aff_list_head); 381 neighbor->aff_head = 1; 382 } 383 384 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 385 || list_entry(neighbor->aff_list.next, struct spu_context, 386 aff_list)->aff_head) { 387 list_add(&ctx->aff_list, &neighbor->aff_list); 388 } else { 389 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 390 if (neighbor->aff_head) { 391 neighbor->aff_head = 0; 392 ctx->aff_head = 1; 393 } 394 } 395 396 if (!ctx->gang->aff_ref_ctx) 397 ctx->gang->aff_ref_ctx = ctx; 398 } 399 } 400 401 static int 402 spufs_create_context(struct inode *inode, struct dentry *dentry, 403 struct vfsmount *mnt, int flags, umode_t mode, 404 struct file *aff_filp) 405 { 406 int ret; 407 int affinity; 408 struct spu_gang *gang; 409 struct spu_context *neighbor; 410 struct path path = {.mnt = mnt, .dentry = dentry}; 411 412 if ((flags & SPU_CREATE_NOSCHED) && 413 !capable(CAP_SYS_NICE)) 414 return -EPERM; 415 416 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 417 == SPU_CREATE_ISOLATE) 418 return -EINVAL; 419 420 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 421 return -ENODEV; 422 423 gang = NULL; 424 neighbor = NULL; 425 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 426 if (affinity) { 427 gang = SPUFS_I(inode)->i_gang; 428 if (!gang) 429 return -EINVAL; 430 mutex_lock(&gang->aff_mutex); 431 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 432 if (IS_ERR(neighbor)) { 433 ret = PTR_ERR(neighbor); 434 goto out_aff_unlock; 435 } 436 } 437 438 ret = spufs_mkdir(inode, dentry, flags, mode & 0777); 439 if (ret) 440 goto out_aff_unlock; 441 442 if (affinity) { 443 spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, 444 neighbor); 445 if (neighbor) 446 put_spu_context(neighbor); 447 } 448 449 ret = spufs_context_open(&path); 450 if (ret < 0) 451 WARN_ON(spufs_rmdir(inode, dentry)); 452 453 out_aff_unlock: 454 if (affinity) 455 mutex_unlock(&gang->aff_mutex); 456 return ret; 457 } 458 459 static int 460 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 461 { 462 int ret; 463 struct inode *inode; 464 struct spu_gang *gang; 465 466 ret = -ENOSPC; 467 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 468 if (!inode) 469 goto out; 470 471 ret = 0; 472 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 473 gang = alloc_spu_gang(); 474 SPUFS_I(inode)->i_ctx = NULL; 475 SPUFS_I(inode)->i_gang = gang; 476 if (!gang) { 477 ret = -ENOMEM; 478 goto out_iput; 479 } 480 481 inode->i_op = &simple_dir_inode_operations; 482 inode->i_fop = &simple_dir_operations; 483 484 d_instantiate(dentry, inode); 485 inc_nlink(dir); 486 inc_nlink(d_inode(dentry)); 487 return ret; 488 489 out_iput: 490 iput(inode); 491 out: 492 return ret; 493 } 494 495 static int spufs_gang_open(const struct path *path) 496 { 497 int ret; 498 struct file *filp; 499 500 ret = get_unused_fd_flags(0); 501 if (ret < 0) 502 return ret; 503 504 /* 505 * get references for dget and mntget, will be released 506 * in error path of *_open(). 507 */ 508 filp = dentry_open(path, O_RDONLY, current_cred()); 509 if (IS_ERR(filp)) { 510 put_unused_fd(ret); 511 return PTR_ERR(filp); 512 } 513 514 filp->f_op = &simple_dir_operations; 515 fd_install(ret, filp); 516 return ret; 517 } 518 519 static int spufs_create_gang(struct inode *inode, 520 struct dentry *dentry, 521 struct vfsmount *mnt, umode_t mode) 522 { 523 struct path path = {.mnt = mnt, .dentry = dentry}; 524 int ret; 525 526 ret = spufs_mkgang(inode, dentry, mode & 0777); 527 if (!ret) { 528 ret = spufs_gang_open(&path); 529 if (ret < 0) { 530 int err = simple_rmdir(inode, dentry); 531 WARN_ON(err); 532 } 533 } 534 return ret; 535 } 536 537 538 static struct file_system_type spufs_type; 539 540 long spufs_create(const struct path *path, struct dentry *dentry, 541 unsigned int flags, umode_t mode, struct file *filp) 542 { 543 struct inode *dir = d_inode(path->dentry); 544 int ret; 545 546 /* check if we are on spufs */ 547 if (path->dentry->d_sb->s_type != &spufs_type) 548 return -EINVAL; 549 550 /* don't accept undefined flags */ 551 if (flags & (~SPU_CREATE_FLAG_ALL)) 552 return -EINVAL; 553 554 /* only threads can be underneath a gang */ 555 if (path->dentry != path->dentry->d_sb->s_root) 556 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 557 return -EINVAL; 558 559 mode &= ~current_umask(); 560 561 if (flags & SPU_CREATE_GANG) 562 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 563 else 564 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 565 filp); 566 if (ret >= 0) 567 fsnotify_mkdir(dir, dentry); 568 569 return ret; 570 } 571 572 /* File system initialization */ 573 struct spufs_fs_context { 574 kuid_t uid; 575 kgid_t gid; 576 umode_t mode; 577 }; 578 579 enum { 580 Opt_uid, Opt_gid, Opt_mode, Opt_debug, 581 }; 582 583 static const struct fs_parameter_spec spufs_fs_parameters[] = { 584 fsparam_u32 ("gid", Opt_gid), 585 fsparam_u32oct ("mode", Opt_mode), 586 fsparam_u32 ("uid", Opt_uid), 587 fsparam_flag ("debug", Opt_debug), 588 {} 589 }; 590 591 static int spufs_show_options(struct seq_file *m, struct dentry *root) 592 { 593 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 594 struct inode *inode = root->d_inode; 595 596 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 597 seq_printf(m, ",uid=%u", 598 from_kuid_munged(&init_user_ns, inode->i_uid)); 599 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 600 seq_printf(m, ",gid=%u", 601 from_kgid_munged(&init_user_ns, inode->i_gid)); 602 if ((inode->i_mode & S_IALLUGO) != 0775) 603 seq_printf(m, ",mode=%o", inode->i_mode); 604 if (sbi->debug) 605 seq_puts(m, ",debug"); 606 return 0; 607 } 608 609 static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param) 610 { 611 struct spufs_fs_context *ctx = fc->fs_private; 612 struct spufs_sb_info *sbi = fc->s_fs_info; 613 struct fs_parse_result result; 614 kuid_t uid; 615 kgid_t gid; 616 int opt; 617 618 opt = fs_parse(fc, spufs_fs_parameters, param, &result); 619 if (opt < 0) 620 return opt; 621 622 switch (opt) { 623 case Opt_uid: 624 uid = make_kuid(current_user_ns(), result.uint_32); 625 if (!uid_valid(uid)) 626 return invalf(fc, "Unknown uid"); 627 ctx->uid = uid; 628 break; 629 case Opt_gid: 630 gid = make_kgid(current_user_ns(), result.uint_32); 631 if (!gid_valid(gid)) 632 return invalf(fc, "Unknown gid"); 633 ctx->gid = gid; 634 break; 635 case Opt_mode: 636 ctx->mode = result.uint_32 & S_IALLUGO; 637 break; 638 case Opt_debug: 639 sbi->debug = true; 640 break; 641 } 642 643 return 0; 644 } 645 646 static void spufs_exit_isolated_loader(void) 647 { 648 free_pages((unsigned long) isolated_loader, 649 get_order(isolated_loader_size)); 650 } 651 652 static void __init 653 spufs_init_isolated_loader(void) 654 { 655 struct device_node *dn; 656 const char *loader; 657 int size; 658 659 dn = of_find_node_by_path("/spu-isolation"); 660 if (!dn) 661 return; 662 663 loader = of_get_property(dn, "loader", &size); 664 of_node_put(dn); 665 if (!loader) 666 return; 667 668 /* the loader must be align on a 16 byte boundary */ 669 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 670 if (!isolated_loader) 671 return; 672 673 isolated_loader_size = size; 674 memcpy(isolated_loader, loader, size); 675 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 676 } 677 678 static int spufs_create_root(struct super_block *sb, struct fs_context *fc) 679 { 680 struct spufs_fs_context *ctx = fc->fs_private; 681 struct inode *inode; 682 683 if (!spu_management_ops) 684 return -ENODEV; 685 686 inode = spufs_new_inode(sb, S_IFDIR | ctx->mode); 687 if (!inode) 688 return -ENOMEM; 689 690 inode->i_uid = ctx->uid; 691 inode->i_gid = ctx->gid; 692 inode->i_op = &simple_dir_inode_operations; 693 inode->i_fop = &simple_dir_operations; 694 SPUFS_I(inode)->i_ctx = NULL; 695 inc_nlink(inode); 696 697 sb->s_root = d_make_root(inode); 698 if (!sb->s_root) 699 return -ENOMEM; 700 return 0; 701 } 702 703 static const struct super_operations spufs_ops = { 704 .alloc_inode = spufs_alloc_inode, 705 .free_inode = spufs_free_inode, 706 .statfs = simple_statfs, 707 .evict_inode = spufs_evict_inode, 708 .show_options = spufs_show_options, 709 }; 710 711 static int spufs_fill_super(struct super_block *sb, struct fs_context *fc) 712 { 713 sb->s_maxbytes = MAX_LFS_FILESIZE; 714 sb->s_blocksize = PAGE_SIZE; 715 sb->s_blocksize_bits = PAGE_SHIFT; 716 sb->s_magic = SPUFS_MAGIC; 717 sb->s_op = &spufs_ops; 718 719 return spufs_create_root(sb, fc); 720 } 721 722 static int spufs_get_tree(struct fs_context *fc) 723 { 724 return get_tree_single(fc, spufs_fill_super); 725 } 726 727 static void spufs_free_fc(struct fs_context *fc) 728 { 729 kfree(fc->s_fs_info); 730 } 731 732 static const struct fs_context_operations spufs_context_ops = { 733 .free = spufs_free_fc, 734 .parse_param = spufs_parse_param, 735 .get_tree = spufs_get_tree, 736 }; 737 738 static int spufs_init_fs_context(struct fs_context *fc) 739 { 740 struct spufs_fs_context *ctx; 741 struct spufs_sb_info *sbi; 742 743 ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL); 744 if (!ctx) 745 goto nomem; 746 747 sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL); 748 if (!sbi) 749 goto nomem_ctx; 750 751 ctx->uid = current_uid(); 752 ctx->gid = current_gid(); 753 ctx->mode = 0755; 754 755 fc->fs_private = ctx; 756 fc->s_fs_info = sbi; 757 fc->ops = &spufs_context_ops; 758 return 0; 759 760 nomem_ctx: 761 kfree(ctx); 762 nomem: 763 return -ENOMEM; 764 } 765 766 static struct file_system_type spufs_type = { 767 .owner = THIS_MODULE, 768 .name = "spufs", 769 .init_fs_context = spufs_init_fs_context, 770 .parameters = spufs_fs_parameters, 771 .kill_sb = kill_litter_super, 772 }; 773 MODULE_ALIAS_FS("spufs"); 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|SLAB_ACCOUNT, 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_DESCRIPTION("SPU file system"); 826 MODULE_LICENSE("GPL"); 827 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 828 829