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/slab.h> 25 26 #include <asm/prom.h> 27 #include <asm/spu.h> 28 #include <asm/spu_priv1.h> 29 #include <linux/uaccess.h> 30 31 #include "spufs.h" 32 33 struct spufs_sb_info { 34 bool debug; 35 }; 36 37 static struct kmem_cache *spufs_inode_cache; 38 char *isolated_loader; 39 static int isolated_loader_size; 40 41 static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) 42 { 43 return sb->s_fs_info; 44 } 45 46 static struct inode * 47 spufs_alloc_inode(struct super_block *sb) 48 { 49 struct spufs_inode_info *ei; 50 51 ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 52 if (!ei) 53 return NULL; 54 55 ei->i_gang = NULL; 56 ei->i_ctx = NULL; 57 ei->i_openers = 0; 58 59 return &ei->vfs_inode; 60 } 61 62 static void spufs_free_inode(struct inode *inode) 63 { 64 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 65 } 66 67 static void 68 spufs_init_once(void *p) 69 { 70 struct spufs_inode_info *ei = p; 71 72 inode_init_once(&ei->vfs_inode); 73 } 74 75 static struct inode * 76 spufs_new_inode(struct super_block *sb, umode_t mode) 77 { 78 struct inode *inode; 79 80 inode = new_inode(sb); 81 if (!inode) 82 goto out; 83 84 inode->i_ino = get_next_ino(); 85 inode->i_mode = mode; 86 inode->i_uid = current_fsuid(); 87 inode->i_gid = current_fsgid(); 88 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 89 out: 90 return inode; 91 } 92 93 static int 94 spufs_setattr(struct dentry *dentry, struct iattr *attr) 95 { 96 struct inode *inode = d_inode(dentry); 97 98 if ((attr->ia_valid & ATTR_SIZE) && 99 (attr->ia_size != inode->i_size)) 100 return -EINVAL; 101 setattr_copy(inode, attr); 102 mark_inode_dirty(inode); 103 return 0; 104 } 105 106 107 static int 108 spufs_new_file(struct super_block *sb, struct dentry *dentry, 109 const struct file_operations *fops, umode_t mode, 110 size_t size, struct spu_context *ctx) 111 { 112 static const struct inode_operations spufs_file_iops = { 113 .setattr = spufs_setattr, 114 }; 115 struct inode *inode; 116 int ret; 117 118 ret = -ENOSPC; 119 inode = spufs_new_inode(sb, S_IFREG | mode); 120 if (!inode) 121 goto out; 122 123 ret = 0; 124 inode->i_op = &spufs_file_iops; 125 inode->i_fop = fops; 126 inode->i_size = size; 127 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 128 d_add(dentry, inode); 129 out: 130 return ret; 131 } 132 133 static void 134 spufs_evict_inode(struct inode *inode) 135 { 136 struct spufs_inode_info *ei = SPUFS_I(inode); 137 clear_inode(inode); 138 if (ei->i_ctx) 139 put_spu_context(ei->i_ctx); 140 if (ei->i_gang) 141 put_spu_gang(ei->i_gang); 142 } 143 144 static void spufs_prune_dir(struct dentry *dir) 145 { 146 struct dentry *dentry, *tmp; 147 148 inode_lock(d_inode(dir)); 149 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) { 150 spin_lock(&dentry->d_lock); 151 if (simple_positive(dentry)) { 152 dget_dlock(dentry); 153 __d_drop(dentry); 154 spin_unlock(&dentry->d_lock); 155 simple_unlink(d_inode(dir), dentry); 156 /* XXX: what was dcache_lock protecting here? Other 157 * filesystems (IB, configfs) release dcache_lock 158 * before unlink */ 159 dput(dentry); 160 } else { 161 spin_unlock(&dentry->d_lock); 162 } 163 } 164 shrink_dcache_parent(dir); 165 inode_unlock(d_inode(dir)); 166 } 167 168 /* Caller must hold parent->i_mutex */ 169 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 170 { 171 /* remove all entries */ 172 int res; 173 spufs_prune_dir(dir); 174 d_drop(dir); 175 res = simple_rmdir(parent, dir); 176 /* We have to give up the mm_struct */ 177 spu_forget(SPUFS_I(d_inode(dir))->i_ctx); 178 return res; 179 } 180 181 static int spufs_fill_dir(struct dentry *dir, 182 const struct spufs_tree_descr *files, umode_t mode, 183 struct spu_context *ctx) 184 { 185 while (files->name && files->name[0]) { 186 int ret; 187 struct dentry *dentry = d_alloc_name(dir, files->name); 188 if (!dentry) 189 return -ENOMEM; 190 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 191 files->mode & mode, files->size, ctx); 192 if (ret) 193 return ret; 194 files++; 195 } 196 return 0; 197 } 198 199 static int spufs_dir_close(struct inode *inode, struct file *file) 200 { 201 struct spu_context *ctx; 202 struct inode *parent; 203 struct dentry *dir; 204 int ret; 205 206 dir = file->f_path.dentry; 207 parent = d_inode(dir->d_parent); 208 ctx = SPUFS_I(d_inode(dir))->i_ctx; 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 if (dir->i_mode & S_ISGID) { 241 inode->i_gid = dir->i_gid; 242 inode->i_mode &= S_ISGID; 243 } 244 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 245 SPUFS_I(inode)->i_ctx = ctx; 246 if (!ctx) { 247 iput(inode); 248 return -ENOSPC; 249 } 250 251 ctx->flags = flags; 252 inode->i_op = &simple_dir_inode_operations; 253 inode->i_fop = &simple_dir_operations; 254 255 inode_lock(inode); 256 257 dget(dentry); 258 inc_nlink(dir); 259 inc_nlink(inode); 260 261 d_instantiate(dentry, inode); 262 263 if (flags & SPU_CREATE_NOSCHED) 264 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 265 mode, ctx); 266 else 267 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 268 269 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 270 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 271 mode, ctx); 272 273 if (ret) 274 spufs_rmdir(dir, dentry); 275 276 inode_unlock(inode); 277 278 return ret; 279 } 280 281 static int spufs_context_open(struct path *path) 282 { 283 int ret; 284 struct file *filp; 285 286 ret = get_unused_fd_flags(0); 287 if (ret < 0) 288 return ret; 289 290 filp = dentry_open(path, O_RDONLY, current_cred()); 291 if (IS_ERR(filp)) { 292 put_unused_fd(ret); 293 return PTR_ERR(filp); 294 } 295 296 filp->f_op = &spufs_context_fops; 297 fd_install(ret, filp); 298 return ret; 299 } 300 301 static struct spu_context * 302 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 303 struct file *filp) 304 { 305 struct spu_context *tmp, *neighbor, *err; 306 int count, node; 307 int aff_supp; 308 309 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 310 struct spu, cbe_list))->aff_list); 311 312 if (!aff_supp) 313 return ERR_PTR(-EINVAL); 314 315 if (flags & SPU_CREATE_GANG) 316 return ERR_PTR(-EINVAL); 317 318 if (flags & SPU_CREATE_AFFINITY_MEM && 319 gang->aff_ref_ctx && 320 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 321 return ERR_PTR(-EEXIST); 322 323 if (gang->aff_flags & AFF_MERGED) 324 return ERR_PTR(-EBUSY); 325 326 neighbor = NULL; 327 if (flags & SPU_CREATE_AFFINITY_SPU) { 328 if (!filp || filp->f_op != &spufs_context_fops) 329 return ERR_PTR(-EINVAL); 330 331 neighbor = get_spu_context( 332 SPUFS_I(file_inode(filp))->i_ctx); 333 334 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 335 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 336 !list_entry(neighbor->aff_list.next, struct spu_context, 337 aff_list)->aff_head) { 338 err = ERR_PTR(-EEXIST); 339 goto out_put_neighbor; 340 } 341 342 if (gang != neighbor->gang) { 343 err = ERR_PTR(-EINVAL); 344 goto out_put_neighbor; 345 } 346 347 count = 1; 348 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 349 count++; 350 if (list_empty(&neighbor->aff_list)) 351 count++; 352 353 for (node = 0; node < MAX_NUMNODES; node++) { 354 if ((cbe_spu_info[node].n_spus - atomic_read( 355 &cbe_spu_info[node].reserved_spus)) >= count) 356 break; 357 } 358 359 if (node == MAX_NUMNODES) { 360 err = ERR_PTR(-EEXIST); 361 goto out_put_neighbor; 362 } 363 } 364 365 return neighbor; 366 367 out_put_neighbor: 368 put_spu_context(neighbor); 369 return err; 370 } 371 372 static void 373 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 374 struct spu_context *neighbor) 375 { 376 if (flags & SPU_CREATE_AFFINITY_MEM) 377 ctx->gang->aff_ref_ctx = ctx; 378 379 if (flags & SPU_CREATE_AFFINITY_SPU) { 380 if (list_empty(&neighbor->aff_list)) { 381 list_add_tail(&neighbor->aff_list, 382 &ctx->gang->aff_list_head); 383 neighbor->aff_head = 1; 384 } 385 386 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 387 || list_entry(neighbor->aff_list.next, struct spu_context, 388 aff_list)->aff_head) { 389 list_add(&ctx->aff_list, &neighbor->aff_list); 390 } else { 391 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 392 if (neighbor->aff_head) { 393 neighbor->aff_head = 0; 394 ctx->aff_head = 1; 395 } 396 } 397 398 if (!ctx->gang->aff_ref_ctx) 399 ctx->gang->aff_ref_ctx = ctx; 400 } 401 } 402 403 static int 404 spufs_create_context(struct inode *inode, struct dentry *dentry, 405 struct vfsmount *mnt, int flags, umode_t mode, 406 struct file *aff_filp) 407 { 408 int ret; 409 int affinity; 410 struct spu_gang *gang; 411 struct spu_context *neighbor; 412 struct path path = {.mnt = mnt, .dentry = dentry}; 413 414 if ((flags & SPU_CREATE_NOSCHED) && 415 !capable(CAP_SYS_NICE)) 416 return -EPERM; 417 418 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 419 == SPU_CREATE_ISOLATE) 420 return -EINVAL; 421 422 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 423 return -ENODEV; 424 425 gang = NULL; 426 neighbor = NULL; 427 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 428 if (affinity) { 429 gang = SPUFS_I(inode)->i_gang; 430 if (!gang) 431 return -EINVAL; 432 mutex_lock(&gang->aff_mutex); 433 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 434 if (IS_ERR(neighbor)) { 435 ret = PTR_ERR(neighbor); 436 goto out_aff_unlock; 437 } 438 } 439 440 ret = spufs_mkdir(inode, dentry, flags, mode & 0777); 441 if (ret) 442 goto out_aff_unlock; 443 444 if (affinity) { 445 spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, 446 neighbor); 447 if (neighbor) 448 put_spu_context(neighbor); 449 } 450 451 ret = spufs_context_open(&path); 452 if (ret < 0) 453 WARN_ON(spufs_rmdir(inode, dentry)); 454 455 out_aff_unlock: 456 if (affinity) 457 mutex_unlock(&gang->aff_mutex); 458 return ret; 459 } 460 461 static int 462 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 463 { 464 int ret; 465 struct inode *inode; 466 struct spu_gang *gang; 467 468 ret = -ENOSPC; 469 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 470 if (!inode) 471 goto out; 472 473 ret = 0; 474 if (dir->i_mode & S_ISGID) { 475 inode->i_gid = dir->i_gid; 476 inode->i_mode &= S_ISGID; 477 } 478 gang = alloc_spu_gang(); 479 SPUFS_I(inode)->i_ctx = NULL; 480 SPUFS_I(inode)->i_gang = gang; 481 if (!gang) { 482 ret = -ENOMEM; 483 goto out_iput; 484 } 485 486 inode->i_op = &simple_dir_inode_operations; 487 inode->i_fop = &simple_dir_operations; 488 489 d_instantiate(dentry, inode); 490 inc_nlink(dir); 491 inc_nlink(d_inode(dentry)); 492 return ret; 493 494 out_iput: 495 iput(inode); 496 out: 497 return ret; 498 } 499 500 static int spufs_gang_open(struct path *path) 501 { 502 int ret; 503 struct file *filp; 504 505 ret = get_unused_fd_flags(0); 506 if (ret < 0) 507 return ret; 508 509 /* 510 * get references for dget and mntget, will be released 511 * in error path of *_open(). 512 */ 513 filp = dentry_open(path, O_RDONLY, current_cred()); 514 if (IS_ERR(filp)) { 515 put_unused_fd(ret); 516 return PTR_ERR(filp); 517 } 518 519 filp->f_op = &simple_dir_operations; 520 fd_install(ret, filp); 521 return ret; 522 } 523 524 static int spufs_create_gang(struct inode *inode, 525 struct dentry *dentry, 526 struct vfsmount *mnt, umode_t mode) 527 { 528 struct path path = {.mnt = mnt, .dentry = dentry}; 529 int ret; 530 531 ret = spufs_mkgang(inode, dentry, mode & 0777); 532 if (!ret) { 533 ret = spufs_gang_open(&path); 534 if (ret < 0) { 535 int err = simple_rmdir(inode, dentry); 536 WARN_ON(err); 537 } 538 } 539 return ret; 540 } 541 542 543 static struct file_system_type spufs_type; 544 545 long spufs_create(struct path *path, struct dentry *dentry, 546 unsigned int flags, umode_t mode, struct file *filp) 547 { 548 struct inode *dir = d_inode(path->dentry); 549 int ret; 550 551 /* check if we are on spufs */ 552 if (path->dentry->d_sb->s_type != &spufs_type) 553 return -EINVAL; 554 555 /* don't accept undefined flags */ 556 if (flags & (~SPU_CREATE_FLAG_ALL)) 557 return -EINVAL; 558 559 /* only threads can be underneath a gang */ 560 if (path->dentry != path->dentry->d_sb->s_root) 561 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 562 return -EINVAL; 563 564 mode &= ~current_umask(); 565 566 if (flags & SPU_CREATE_GANG) 567 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 568 else 569 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 570 filp); 571 if (ret >= 0) 572 fsnotify_mkdir(dir, dentry); 573 574 return ret; 575 } 576 577 /* File system initialization */ 578 struct spufs_fs_context { 579 kuid_t uid; 580 kgid_t gid; 581 umode_t mode; 582 }; 583 584 enum { 585 Opt_uid, Opt_gid, Opt_mode, Opt_debug, 586 }; 587 588 static const struct fs_parameter_spec spufs_param_specs[] = { 589 fsparam_u32 ("gid", Opt_gid), 590 fsparam_u32oct ("mode", Opt_mode), 591 fsparam_u32 ("uid", Opt_uid), 592 fsparam_flag ("debug", Opt_debug), 593 {} 594 }; 595 596 static const struct fs_parameter_description spufs_fs_parameters = { 597 .name = "spufs", 598 .specs = spufs_param_specs, 599 }; 600 601 static int spufs_show_options(struct seq_file *m, struct dentry *root) 602 { 603 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 604 struct inode *inode = root->d_inode; 605 606 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 607 seq_printf(m, ",uid=%u", 608 from_kuid_munged(&init_user_ns, inode->i_uid)); 609 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 610 seq_printf(m, ",gid=%u", 611 from_kgid_munged(&init_user_ns, inode->i_gid)); 612 if ((inode->i_mode & S_IALLUGO) != 0775) 613 seq_printf(m, ",mode=%o", inode->i_mode); 614 if (sbi->debug) 615 seq_puts(m, ",debug"); 616 return 0; 617 } 618 619 static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param) 620 { 621 struct spufs_fs_context *ctx = fc->fs_private; 622 struct spufs_sb_info *sbi = fc->s_fs_info; 623 struct fs_parse_result result; 624 kuid_t uid; 625 kgid_t gid; 626 int opt; 627 628 opt = fs_parse(fc, &spufs_fs_parameters, param, &result); 629 if (opt < 0) 630 return opt; 631 632 switch (opt) { 633 case Opt_uid: 634 uid = make_kuid(current_user_ns(), result.uint_32); 635 if (!uid_valid(uid)) 636 return invalf(fc, "Unknown uid"); 637 ctx->uid = uid; 638 break; 639 case Opt_gid: 640 gid = make_kgid(current_user_ns(), result.uint_32); 641 if (!gid_valid(gid)) 642 return invalf(fc, "Unknown gid"); 643 ctx->gid = gid; 644 break; 645 case Opt_mode: 646 ctx->mode = result.uint_32 & S_IALLUGO; 647 break; 648 case Opt_debug: 649 sbi->debug = true; 650 break; 651 } 652 653 return 0; 654 } 655 656 static void spufs_exit_isolated_loader(void) 657 { 658 free_pages((unsigned long) isolated_loader, 659 get_order(isolated_loader_size)); 660 } 661 662 static void 663 spufs_init_isolated_loader(void) 664 { 665 struct device_node *dn; 666 const char *loader; 667 int size; 668 669 dn = of_find_node_by_path("/spu-isolation"); 670 if (!dn) 671 return; 672 673 loader = of_get_property(dn, "loader", &size); 674 if (!loader) 675 return; 676 677 /* the loader must be align on a 16 byte boundary */ 678 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 679 if (!isolated_loader) 680 return; 681 682 isolated_loader_size = size; 683 memcpy(isolated_loader, loader, size); 684 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 685 } 686 687 static int spufs_create_root(struct super_block *sb, struct fs_context *fc) 688 { 689 struct spufs_fs_context *ctx = fc->fs_private; 690 struct inode *inode; 691 692 if (!spu_management_ops) 693 return -ENODEV; 694 695 inode = spufs_new_inode(sb, S_IFDIR | ctx->mode); 696 if (!inode) 697 return -ENOMEM; 698 699 inode->i_uid = ctx->uid; 700 inode->i_gid = ctx->gid; 701 inode->i_op = &simple_dir_inode_operations; 702 inode->i_fop = &simple_dir_operations; 703 SPUFS_I(inode)->i_ctx = NULL; 704 inc_nlink(inode); 705 706 sb->s_root = d_make_root(inode); 707 if (!sb->s_root) 708 return -ENOMEM; 709 return 0; 710 } 711 712 static const struct super_operations spufs_ops = { 713 .alloc_inode = spufs_alloc_inode, 714 .free_inode = spufs_free_inode, 715 .statfs = simple_statfs, 716 .evict_inode = spufs_evict_inode, 717 .show_options = spufs_show_options, 718 }; 719 720 static int spufs_fill_super(struct super_block *sb, struct fs_context *fc) 721 { 722 sb->s_maxbytes = MAX_LFS_FILESIZE; 723 sb->s_blocksize = PAGE_SIZE; 724 sb->s_blocksize_bits = PAGE_SHIFT; 725 sb->s_magic = SPUFS_MAGIC; 726 sb->s_op = &spufs_ops; 727 728 return spufs_create_root(sb, fc); 729 } 730 731 static int spufs_get_tree(struct fs_context *fc) 732 { 733 return get_tree_single(fc, spufs_fill_super); 734 } 735 736 static void spufs_free_fc(struct fs_context *fc) 737 { 738 kfree(fc->s_fs_info); 739 } 740 741 static const struct fs_context_operations spufs_context_ops = { 742 .free = spufs_free_fc, 743 .parse_param = spufs_parse_param, 744 .get_tree = spufs_get_tree, 745 }; 746 747 static int spufs_init_fs_context(struct fs_context *fc) 748 { 749 struct spufs_fs_context *ctx; 750 struct spufs_sb_info *sbi; 751 752 ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL); 753 if (!ctx) 754 goto nomem; 755 756 sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL); 757 if (!sbi) 758 goto nomem_ctx; 759 760 ctx->uid = current_uid(); 761 ctx->gid = current_gid(); 762 ctx->mode = 0755; 763 764 fc->s_fs_info = sbi; 765 fc->ops = &spufs_context_ops; 766 return 0; 767 768 nomem_ctx: 769 kfree(ctx); 770 nomem: 771 return -ENOMEM; 772 } 773 774 static struct file_system_type spufs_type = { 775 .owner = THIS_MODULE, 776 .name = "spufs", 777 .init_fs_context = spufs_init_fs_context, 778 .parameters = &spufs_fs_parameters, 779 .kill_sb = kill_litter_super, 780 }; 781 MODULE_ALIAS_FS("spufs"); 782 783 static int __init spufs_init(void) 784 { 785 int ret; 786 787 ret = -ENODEV; 788 if (!spu_management_ops) 789 goto out; 790 791 ret = -ENOMEM; 792 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 793 sizeof(struct spufs_inode_info), 0, 794 SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); 795 796 if (!spufs_inode_cache) 797 goto out; 798 ret = spu_sched_init(); 799 if (ret) 800 goto out_cache; 801 ret = register_spu_syscalls(&spufs_calls); 802 if (ret) 803 goto out_sched; 804 ret = register_filesystem(&spufs_type); 805 if (ret) 806 goto out_syscalls; 807 808 spufs_init_isolated_loader(); 809 810 return 0; 811 812 out_syscalls: 813 unregister_spu_syscalls(&spufs_calls); 814 out_sched: 815 spu_sched_exit(); 816 out_cache: 817 kmem_cache_destroy(spufs_inode_cache); 818 out: 819 return ret; 820 } 821 module_init(spufs_init); 822 823 static void __exit spufs_exit(void) 824 { 825 spu_sched_exit(); 826 spufs_exit_isolated_loader(); 827 unregister_spu_syscalls(&spufs_calls); 828 unregister_filesystem(&spufs_type); 829 kmem_cache_destroy(spufs_inode_cache); 830 } 831 module_exit(spufs_exit); 832 833 MODULE_LICENSE("GPL"); 834 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 835 836