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 inode->i_atime = inode->i_mtime = inode_set_ctime_current(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, *tmp; 149 150 inode_lock(d_inode(dir)); 151 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) { 152 spin_lock(&dentry->d_lock); 153 if (simple_positive(dentry)) { 154 dget_dlock(dentry); 155 __d_drop(dentry); 156 spin_unlock(&dentry->d_lock); 157 simple_unlink(d_inode(dir), dentry); 158 /* XXX: what was dcache_lock protecting here? Other 159 * filesystems (IB, configfs) release dcache_lock 160 * before unlink */ 161 dput(dentry); 162 } else { 163 spin_unlock(&dentry->d_lock); 164 } 165 } 166 shrink_dcache_parent(dir); 167 inode_unlock(d_inode(dir)); 168 } 169 170 /* Caller must hold parent->i_mutex */ 171 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 172 { 173 /* remove all entries */ 174 int res; 175 spufs_prune_dir(dir); 176 d_drop(dir); 177 res = simple_rmdir(parent, dir); 178 /* We have to give up the mm_struct */ 179 spu_forget(SPUFS_I(d_inode(dir))->i_ctx); 180 return res; 181 } 182 183 static int spufs_fill_dir(struct dentry *dir, 184 const struct spufs_tree_descr *files, umode_t mode, 185 struct spu_context *ctx) 186 { 187 while (files->name && files->name[0]) { 188 int ret; 189 struct dentry *dentry = d_alloc_name(dir, files->name); 190 if (!dentry) 191 return -ENOMEM; 192 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 193 files->mode & mode, files->size, ctx); 194 if (ret) 195 return ret; 196 files++; 197 } 198 return 0; 199 } 200 201 static int spufs_dir_close(struct inode *inode, struct file *file) 202 { 203 struct inode *parent; 204 struct dentry *dir; 205 int ret; 206 207 dir = file->f_path.dentry; 208 parent = d_inode(dir->d_parent); 209 210 inode_lock_nested(parent, I_MUTEX_PARENT); 211 ret = spufs_rmdir(parent, dir); 212 inode_unlock(parent); 213 WARN_ON(ret); 214 215 return dcache_dir_close(inode, file); 216 } 217 218 const struct file_operations spufs_context_fops = { 219 .open = dcache_dir_open, 220 .release = spufs_dir_close, 221 .llseek = dcache_dir_lseek, 222 .read = generic_read_dir, 223 .iterate_shared = dcache_readdir, 224 .fsync = noop_fsync, 225 }; 226 EXPORT_SYMBOL_GPL(spufs_context_fops); 227 228 static int 229 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 230 umode_t mode) 231 { 232 int ret; 233 struct inode *inode; 234 struct spu_context *ctx; 235 236 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 237 if (!inode) 238 return -ENOSPC; 239 240 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 241 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 242 SPUFS_I(inode)->i_ctx = ctx; 243 if (!ctx) { 244 iput(inode); 245 return -ENOSPC; 246 } 247 248 ctx->flags = flags; 249 inode->i_op = &simple_dir_inode_operations; 250 inode->i_fop = &simple_dir_operations; 251 252 inode_lock(inode); 253 254 dget(dentry); 255 inc_nlink(dir); 256 inc_nlink(inode); 257 258 d_instantiate(dentry, inode); 259 260 if (flags & SPU_CREATE_NOSCHED) 261 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 262 mode, ctx); 263 else 264 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 265 266 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 267 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 268 mode, ctx); 269 270 if (ret) 271 spufs_rmdir(dir, dentry); 272 273 inode_unlock(inode); 274 275 return ret; 276 } 277 278 static int spufs_context_open(const struct path *path) 279 { 280 int ret; 281 struct file *filp; 282 283 ret = get_unused_fd_flags(0); 284 if (ret < 0) 285 return ret; 286 287 filp = dentry_open(path, O_RDONLY, current_cred()); 288 if (IS_ERR(filp)) { 289 put_unused_fd(ret); 290 return PTR_ERR(filp); 291 } 292 293 filp->f_op = &spufs_context_fops; 294 fd_install(ret, filp); 295 return ret; 296 } 297 298 static struct spu_context * 299 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 300 struct file *filp) 301 { 302 struct spu_context *tmp, *neighbor, *err; 303 int count, node; 304 int aff_supp; 305 306 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 307 struct spu, cbe_list))->aff_list); 308 309 if (!aff_supp) 310 return ERR_PTR(-EINVAL); 311 312 if (flags & SPU_CREATE_GANG) 313 return ERR_PTR(-EINVAL); 314 315 if (flags & SPU_CREATE_AFFINITY_MEM && 316 gang->aff_ref_ctx && 317 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 318 return ERR_PTR(-EEXIST); 319 320 if (gang->aff_flags & AFF_MERGED) 321 return ERR_PTR(-EBUSY); 322 323 neighbor = NULL; 324 if (flags & SPU_CREATE_AFFINITY_SPU) { 325 if (!filp || filp->f_op != &spufs_context_fops) 326 return ERR_PTR(-EINVAL); 327 328 neighbor = get_spu_context( 329 SPUFS_I(file_inode(filp))->i_ctx); 330 331 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 332 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 333 !list_entry(neighbor->aff_list.next, struct spu_context, 334 aff_list)->aff_head) { 335 err = ERR_PTR(-EEXIST); 336 goto out_put_neighbor; 337 } 338 339 if (gang != neighbor->gang) { 340 err = ERR_PTR(-EINVAL); 341 goto out_put_neighbor; 342 } 343 344 count = 1; 345 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 346 count++; 347 if (list_empty(&neighbor->aff_list)) 348 count++; 349 350 for (node = 0; node < MAX_NUMNODES; node++) { 351 if ((cbe_spu_info[node].n_spus - atomic_read( 352 &cbe_spu_info[node].reserved_spus)) >= count) 353 break; 354 } 355 356 if (node == MAX_NUMNODES) { 357 err = ERR_PTR(-EEXIST); 358 goto out_put_neighbor; 359 } 360 } 361 362 return neighbor; 363 364 out_put_neighbor: 365 put_spu_context(neighbor); 366 return err; 367 } 368 369 static void 370 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 371 struct spu_context *neighbor) 372 { 373 if (flags & SPU_CREATE_AFFINITY_MEM) 374 ctx->gang->aff_ref_ctx = ctx; 375 376 if (flags & SPU_CREATE_AFFINITY_SPU) { 377 if (list_empty(&neighbor->aff_list)) { 378 list_add_tail(&neighbor->aff_list, 379 &ctx->gang->aff_list_head); 380 neighbor->aff_head = 1; 381 } 382 383 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 384 || list_entry(neighbor->aff_list.next, struct spu_context, 385 aff_list)->aff_head) { 386 list_add(&ctx->aff_list, &neighbor->aff_list); 387 } else { 388 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 389 if (neighbor->aff_head) { 390 neighbor->aff_head = 0; 391 ctx->aff_head = 1; 392 } 393 } 394 395 if (!ctx->gang->aff_ref_ctx) 396 ctx->gang->aff_ref_ctx = ctx; 397 } 398 } 399 400 static int 401 spufs_create_context(struct inode *inode, struct dentry *dentry, 402 struct vfsmount *mnt, int flags, umode_t mode, 403 struct file *aff_filp) 404 { 405 int ret; 406 int affinity; 407 struct spu_gang *gang; 408 struct spu_context *neighbor; 409 struct path path = {.mnt = mnt, .dentry = dentry}; 410 411 if ((flags & SPU_CREATE_NOSCHED) && 412 !capable(CAP_SYS_NICE)) 413 return -EPERM; 414 415 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 416 == SPU_CREATE_ISOLATE) 417 return -EINVAL; 418 419 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 420 return -ENODEV; 421 422 gang = NULL; 423 neighbor = NULL; 424 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 425 if (affinity) { 426 gang = SPUFS_I(inode)->i_gang; 427 if (!gang) 428 return -EINVAL; 429 mutex_lock(&gang->aff_mutex); 430 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 431 if (IS_ERR(neighbor)) { 432 ret = PTR_ERR(neighbor); 433 goto out_aff_unlock; 434 } 435 } 436 437 ret = spufs_mkdir(inode, dentry, flags, mode & 0777); 438 if (ret) 439 goto out_aff_unlock; 440 441 if (affinity) { 442 spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, 443 neighbor); 444 if (neighbor) 445 put_spu_context(neighbor); 446 } 447 448 ret = spufs_context_open(&path); 449 if (ret < 0) 450 WARN_ON(spufs_rmdir(inode, dentry)); 451 452 out_aff_unlock: 453 if (affinity) 454 mutex_unlock(&gang->aff_mutex); 455 return ret; 456 } 457 458 static int 459 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 460 { 461 int ret; 462 struct inode *inode; 463 struct spu_gang *gang; 464 465 ret = -ENOSPC; 466 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 467 if (!inode) 468 goto out; 469 470 ret = 0; 471 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 472 gang = alloc_spu_gang(); 473 SPUFS_I(inode)->i_ctx = NULL; 474 SPUFS_I(inode)->i_gang = gang; 475 if (!gang) { 476 ret = -ENOMEM; 477 goto out_iput; 478 } 479 480 inode->i_op = &simple_dir_inode_operations; 481 inode->i_fop = &simple_dir_operations; 482 483 d_instantiate(dentry, inode); 484 inc_nlink(dir); 485 inc_nlink(d_inode(dentry)); 486 return ret; 487 488 out_iput: 489 iput(inode); 490 out: 491 return ret; 492 } 493 494 static int spufs_gang_open(const struct path *path) 495 { 496 int ret; 497 struct file *filp; 498 499 ret = get_unused_fd_flags(0); 500 if (ret < 0) 501 return ret; 502 503 /* 504 * get references for dget and mntget, will be released 505 * in error path of *_open(). 506 */ 507 filp = dentry_open(path, O_RDONLY, current_cred()); 508 if (IS_ERR(filp)) { 509 put_unused_fd(ret); 510 return PTR_ERR(filp); 511 } 512 513 filp->f_op = &simple_dir_operations; 514 fd_install(ret, filp); 515 return ret; 516 } 517 518 static int spufs_create_gang(struct inode *inode, 519 struct dentry *dentry, 520 struct vfsmount *mnt, umode_t mode) 521 { 522 struct path path = {.mnt = mnt, .dentry = dentry}; 523 int ret; 524 525 ret = spufs_mkgang(inode, dentry, mode & 0777); 526 if (!ret) { 527 ret = spufs_gang_open(&path); 528 if (ret < 0) { 529 int err = simple_rmdir(inode, dentry); 530 WARN_ON(err); 531 } 532 } 533 return ret; 534 } 535 536 537 static struct file_system_type spufs_type; 538 539 long spufs_create(const struct path *path, struct dentry *dentry, 540 unsigned int flags, umode_t mode, struct file *filp) 541 { 542 struct inode *dir = d_inode(path->dentry); 543 int ret; 544 545 /* check if we are on spufs */ 546 if (path->dentry->d_sb->s_type != &spufs_type) 547 return -EINVAL; 548 549 /* don't accept undefined flags */ 550 if (flags & (~SPU_CREATE_FLAG_ALL)) 551 return -EINVAL; 552 553 /* only threads can be underneath a gang */ 554 if (path->dentry != path->dentry->d_sb->s_root) 555 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 556 return -EINVAL; 557 558 mode &= ~current_umask(); 559 560 if (flags & SPU_CREATE_GANG) 561 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 562 else 563 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 564 filp); 565 if (ret >= 0) 566 fsnotify_mkdir(dir, dentry); 567 568 return ret; 569 } 570 571 /* File system initialization */ 572 struct spufs_fs_context { 573 kuid_t uid; 574 kgid_t gid; 575 umode_t mode; 576 }; 577 578 enum { 579 Opt_uid, Opt_gid, Opt_mode, Opt_debug, 580 }; 581 582 static const struct fs_parameter_spec spufs_fs_parameters[] = { 583 fsparam_u32 ("gid", Opt_gid), 584 fsparam_u32oct ("mode", Opt_mode), 585 fsparam_u32 ("uid", Opt_uid), 586 fsparam_flag ("debug", Opt_debug), 587 {} 588 }; 589 590 static int spufs_show_options(struct seq_file *m, struct dentry *root) 591 { 592 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 593 struct inode *inode = root->d_inode; 594 595 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 596 seq_printf(m, ",uid=%u", 597 from_kuid_munged(&init_user_ns, inode->i_uid)); 598 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 599 seq_printf(m, ",gid=%u", 600 from_kgid_munged(&init_user_ns, inode->i_gid)); 601 if ((inode->i_mode & S_IALLUGO) != 0775) 602 seq_printf(m, ",mode=%o", inode->i_mode); 603 if (sbi->debug) 604 seq_puts(m, ",debug"); 605 return 0; 606 } 607 608 static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param) 609 { 610 struct spufs_fs_context *ctx = fc->fs_private; 611 struct spufs_sb_info *sbi = fc->s_fs_info; 612 struct fs_parse_result result; 613 kuid_t uid; 614 kgid_t gid; 615 int opt; 616 617 opt = fs_parse(fc, spufs_fs_parameters, param, &result); 618 if (opt < 0) 619 return opt; 620 621 switch (opt) { 622 case Opt_uid: 623 uid = make_kuid(current_user_ns(), result.uint_32); 624 if (!uid_valid(uid)) 625 return invalf(fc, "Unknown uid"); 626 ctx->uid = uid; 627 break; 628 case Opt_gid: 629 gid = make_kgid(current_user_ns(), result.uint_32); 630 if (!gid_valid(gid)) 631 return invalf(fc, "Unknown gid"); 632 ctx->gid = gid; 633 break; 634 case Opt_mode: 635 ctx->mode = result.uint_32 & S_IALLUGO; 636 break; 637 case Opt_debug: 638 sbi->debug = true; 639 break; 640 } 641 642 return 0; 643 } 644 645 static void spufs_exit_isolated_loader(void) 646 { 647 free_pages((unsigned long) isolated_loader, 648 get_order(isolated_loader_size)); 649 } 650 651 static void __init 652 spufs_init_isolated_loader(void) 653 { 654 struct device_node *dn; 655 const char *loader; 656 int size; 657 658 dn = of_find_node_by_path("/spu-isolation"); 659 if (!dn) 660 return; 661 662 loader = of_get_property(dn, "loader", &size); 663 of_node_put(dn); 664 if (!loader) 665 return; 666 667 /* the loader must be align on a 16 byte boundary */ 668 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 669 if (!isolated_loader) 670 return; 671 672 isolated_loader_size = size; 673 memcpy(isolated_loader, loader, size); 674 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 675 } 676 677 static int spufs_create_root(struct super_block *sb, struct fs_context *fc) 678 { 679 struct spufs_fs_context *ctx = fc->fs_private; 680 struct inode *inode; 681 682 if (!spu_management_ops) 683 return -ENODEV; 684 685 inode = spufs_new_inode(sb, S_IFDIR | ctx->mode); 686 if (!inode) 687 return -ENOMEM; 688 689 inode->i_uid = ctx->uid; 690 inode->i_gid = ctx->gid; 691 inode->i_op = &simple_dir_inode_operations; 692 inode->i_fop = &simple_dir_operations; 693 SPUFS_I(inode)->i_ctx = NULL; 694 inc_nlink(inode); 695 696 sb->s_root = d_make_root(inode); 697 if (!sb->s_root) 698 return -ENOMEM; 699 return 0; 700 } 701 702 static const struct super_operations spufs_ops = { 703 .alloc_inode = spufs_alloc_inode, 704 .free_inode = spufs_free_inode, 705 .statfs = simple_statfs, 706 .evict_inode = spufs_evict_inode, 707 .show_options = spufs_show_options, 708 }; 709 710 static int spufs_fill_super(struct super_block *sb, struct fs_context *fc) 711 { 712 sb->s_maxbytes = MAX_LFS_FILESIZE; 713 sb->s_blocksize = PAGE_SIZE; 714 sb->s_blocksize_bits = PAGE_SHIFT; 715 sb->s_magic = SPUFS_MAGIC; 716 sb->s_op = &spufs_ops; 717 718 return spufs_create_root(sb, fc); 719 } 720 721 static int spufs_get_tree(struct fs_context *fc) 722 { 723 return get_tree_single(fc, spufs_fill_super); 724 } 725 726 static void spufs_free_fc(struct fs_context *fc) 727 { 728 kfree(fc->s_fs_info); 729 } 730 731 static const struct fs_context_operations spufs_context_ops = { 732 .free = spufs_free_fc, 733 .parse_param = spufs_parse_param, 734 .get_tree = spufs_get_tree, 735 }; 736 737 static int spufs_init_fs_context(struct fs_context *fc) 738 { 739 struct spufs_fs_context *ctx; 740 struct spufs_sb_info *sbi; 741 742 ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL); 743 if (!ctx) 744 goto nomem; 745 746 sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL); 747 if (!sbi) 748 goto nomem_ctx; 749 750 ctx->uid = current_uid(); 751 ctx->gid = current_gid(); 752 ctx->mode = 0755; 753 754 fc->fs_private = ctx; 755 fc->s_fs_info = sbi; 756 fc->ops = &spufs_context_ops; 757 return 0; 758 759 nomem_ctx: 760 kfree(ctx); 761 nomem: 762 return -ENOMEM; 763 } 764 765 static struct file_system_type spufs_type = { 766 .owner = THIS_MODULE, 767 .name = "spufs", 768 .init_fs_context = spufs_init_fs_context, 769 .parameters = spufs_fs_parameters, 770 .kill_sb = kill_litter_super, 771 }; 772 MODULE_ALIAS_FS("spufs"); 773 774 static int __init spufs_init(void) 775 { 776 int ret; 777 778 ret = -ENODEV; 779 if (!spu_management_ops) 780 goto out; 781 782 ret = -ENOMEM; 783 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 784 sizeof(struct spufs_inode_info), 0, 785 SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); 786 787 if (!spufs_inode_cache) 788 goto out; 789 ret = spu_sched_init(); 790 if (ret) 791 goto out_cache; 792 ret = register_spu_syscalls(&spufs_calls); 793 if (ret) 794 goto out_sched; 795 ret = register_filesystem(&spufs_type); 796 if (ret) 797 goto out_syscalls; 798 799 spufs_init_isolated_loader(); 800 801 return 0; 802 803 out_syscalls: 804 unregister_spu_syscalls(&spufs_calls); 805 out_sched: 806 spu_sched_exit(); 807 out_cache: 808 kmem_cache_destroy(spufs_inode_cache); 809 out: 810 return ret; 811 } 812 module_init(spufs_init); 813 814 static void __exit spufs_exit(void) 815 { 816 spu_sched_exit(); 817 spufs_exit_isolated_loader(); 818 unregister_spu_syscalls(&spufs_calls); 819 unregister_filesystem(&spufs_type); 820 kmem_cache_destroy(spufs_inode_cache); 821 } 822 module_exit(spufs_exit); 823 824 MODULE_LICENSE("GPL"); 825 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 826 827