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_make_persistent(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 /* Caller must hold parent->i_mutex */ 147 static void spufs_rmdir(struct inode *parent, struct dentry *dir) 148 { 149 struct spu_context *ctx = SPUFS_I(d_inode(dir))->i_ctx; 150 151 locked_recursive_removal(dir, NULL); 152 spu_forget(ctx); 153 } 154 155 static int spufs_fill_dir(struct dentry *dir, 156 const struct spufs_tree_descr *files, umode_t mode, 157 struct spu_context *ctx) 158 { 159 while (files->name && files->name[0]) { 160 int ret; 161 struct dentry *dentry = d_alloc_name(dir, files->name); 162 if (!dentry) 163 return -ENOMEM; 164 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 165 files->mode & mode, files->size, ctx); 166 dput(dentry); 167 if (ret) 168 return ret; 169 files++; 170 } 171 return 0; 172 } 173 174 static void unuse_gang(struct dentry *dir) 175 { 176 struct inode *inode = dir->d_inode; 177 struct spu_gang *gang = SPUFS_I(inode)->i_gang; 178 179 if (gang) { 180 bool dead; 181 182 inode_lock(inode); // exclusion with spufs_create_context() 183 dead = !--gang->alive; 184 inode_unlock(inode); 185 186 if (dead) 187 simple_recursive_removal(dir, NULL); 188 } 189 } 190 191 static int spufs_dir_close(struct inode *inode, struct file *file) 192 { 193 struct inode *parent; 194 struct dentry *dir; 195 196 dir = file->f_path.dentry; 197 parent = d_inode(dir->d_parent); 198 199 inode_lock_nested(parent, I_MUTEX_PARENT); 200 spufs_rmdir(parent, dir); 201 inode_unlock(parent); 202 203 unuse_gang(dir->d_parent); 204 return dcache_dir_close(inode, file); 205 } 206 207 const struct file_operations spufs_context_fops = { 208 .open = dcache_dir_open, 209 .release = spufs_dir_close, 210 .llseek = dcache_dir_lseek, 211 .read = generic_read_dir, 212 .iterate_shared = dcache_readdir, 213 .fsync = noop_fsync, 214 }; 215 EXPORT_SYMBOL_GPL(spufs_context_fops); 216 217 static int 218 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 219 umode_t mode) 220 { 221 int ret; 222 struct inode *inode; 223 struct spu_context *ctx; 224 225 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 226 if (!inode) 227 return -ENOSPC; 228 229 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 230 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 231 SPUFS_I(inode)->i_ctx = ctx; 232 if (!ctx) { 233 iput(inode); 234 return -ENOSPC; 235 } 236 237 ctx->flags = flags; 238 inode->i_op = &simple_dir_inode_operations; 239 inode->i_fop = &simple_dir_operations; 240 241 inode_lock(inode); 242 243 inc_nlink(dir); 244 inc_nlink(inode); 245 246 d_make_persistent(dentry, inode); 247 248 if (flags & SPU_CREATE_NOSCHED) 249 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 250 mode, ctx); 251 else 252 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 253 254 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 255 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 256 mode, ctx); 257 258 inode_unlock(inode); 259 260 if (ret) 261 spufs_rmdir(dir, dentry); 262 263 return ret; 264 } 265 266 static int spufs_context_open(const struct path *path) 267 { 268 FD_PREPARE(fdf, 0, dentry_open(path, O_RDONLY, current_cred())); 269 if (fdf.err) 270 return fdf.err; 271 fd_prepare_file(fdf)->f_op = &spufs_context_fops; 272 return fd_publish(fdf); 273 } 274 275 static struct spu_context * 276 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 277 struct file *filp) 278 { 279 struct spu_context *tmp, *neighbor, *err; 280 int count, node; 281 int aff_supp; 282 283 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 284 struct spu, cbe_list))->aff_list); 285 286 if (!aff_supp) 287 return ERR_PTR(-EINVAL); 288 289 if (flags & SPU_CREATE_GANG) 290 return ERR_PTR(-EINVAL); 291 292 if (flags & SPU_CREATE_AFFINITY_MEM && 293 gang->aff_ref_ctx && 294 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 295 return ERR_PTR(-EEXIST); 296 297 if (gang->aff_flags & AFF_MERGED) 298 return ERR_PTR(-EBUSY); 299 300 neighbor = NULL; 301 if (flags & SPU_CREATE_AFFINITY_SPU) { 302 if (!filp || filp->f_op != &spufs_context_fops) 303 return ERR_PTR(-EINVAL); 304 305 neighbor = get_spu_context( 306 SPUFS_I(file_inode(filp))->i_ctx); 307 308 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 309 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 310 !list_entry(neighbor->aff_list.next, struct spu_context, 311 aff_list)->aff_head) { 312 err = ERR_PTR(-EEXIST); 313 goto out_put_neighbor; 314 } 315 316 if (gang != neighbor->gang) { 317 err = ERR_PTR(-EINVAL); 318 goto out_put_neighbor; 319 } 320 321 count = 1; 322 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 323 count++; 324 if (list_empty(&neighbor->aff_list)) 325 count++; 326 327 for (node = 0; node < MAX_NUMNODES; node++) { 328 if ((cbe_spu_info[node].n_spus - atomic_read( 329 &cbe_spu_info[node].reserved_spus)) >= count) 330 break; 331 } 332 333 if (node == MAX_NUMNODES) { 334 err = ERR_PTR(-EEXIST); 335 goto out_put_neighbor; 336 } 337 } 338 339 return neighbor; 340 341 out_put_neighbor: 342 put_spu_context(neighbor); 343 return err; 344 } 345 346 static void 347 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 348 struct spu_context *neighbor) 349 { 350 if (flags & SPU_CREATE_AFFINITY_MEM) 351 ctx->gang->aff_ref_ctx = ctx; 352 353 if (flags & SPU_CREATE_AFFINITY_SPU) { 354 if (list_empty(&neighbor->aff_list)) { 355 list_add_tail(&neighbor->aff_list, 356 &ctx->gang->aff_list_head); 357 neighbor->aff_head = 1; 358 } 359 360 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 361 || list_entry(neighbor->aff_list.next, struct spu_context, 362 aff_list)->aff_head) { 363 list_add(&ctx->aff_list, &neighbor->aff_list); 364 } else { 365 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 366 if (neighbor->aff_head) { 367 neighbor->aff_head = 0; 368 ctx->aff_head = 1; 369 } 370 } 371 372 if (!ctx->gang->aff_ref_ctx) 373 ctx->gang->aff_ref_ctx = ctx; 374 } 375 } 376 377 static int 378 spufs_create_context(struct inode *inode, struct dentry *dentry, 379 struct vfsmount *mnt, int flags, umode_t mode, 380 struct file *aff_filp) 381 { 382 int ret; 383 int affinity; 384 struct spu_gang *gang = SPUFS_I(inode)->i_gang; 385 struct spu_context *neighbor; 386 struct path path = {.mnt = mnt, .dentry = dentry}; 387 388 if ((flags & SPU_CREATE_NOSCHED) && 389 !capable(CAP_SYS_NICE)) 390 return -EPERM; 391 392 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 393 == SPU_CREATE_ISOLATE) 394 return -EINVAL; 395 396 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 397 return -ENODEV; 398 399 if (gang) { 400 if (!gang->alive) 401 return -ENOENT; 402 gang->alive++; 403 } 404 405 neighbor = NULL; 406 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 407 if (affinity) { 408 if (!gang) 409 return -EINVAL; 410 mutex_lock(&gang->aff_mutex); 411 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 412 if (IS_ERR(neighbor)) { 413 ret = PTR_ERR(neighbor); 414 goto out_aff_unlock; 415 } 416 } 417 418 ret = spufs_mkdir(inode, dentry, flags, mode & 0777); 419 if (ret) { 420 if (neighbor) 421 put_spu_context(neighbor); 422 goto out_aff_unlock; 423 } 424 425 if (affinity) { 426 spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, 427 neighbor); 428 if (neighbor) 429 put_spu_context(neighbor); 430 } 431 432 ret = spufs_context_open(&path); 433 if (ret < 0) 434 spufs_rmdir(inode, dentry); 435 436 out_aff_unlock: 437 if (affinity) 438 mutex_unlock(&gang->aff_mutex); 439 if (ret && gang) 440 gang->alive--; // can't reach 0 441 return ret; 442 } 443 444 static int 445 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 446 { 447 int ret; 448 struct inode *inode; 449 struct spu_gang *gang; 450 451 ret = -ENOSPC; 452 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 453 if (!inode) 454 goto out; 455 456 ret = 0; 457 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 458 gang = alloc_spu_gang(); 459 SPUFS_I(inode)->i_ctx = NULL; 460 SPUFS_I(inode)->i_gang = gang; 461 if (!gang) { 462 ret = -ENOMEM; 463 goto out_iput; 464 } 465 466 inode->i_op = &simple_dir_inode_operations; 467 inode->i_fop = &simple_dir_operations; 468 469 inc_nlink(dir); 470 inc_nlink(inode); 471 d_make_persistent(dentry, inode); 472 return ret; 473 474 out_iput: 475 iput(inode); 476 out: 477 return ret; 478 } 479 480 static int spufs_gang_close(struct inode *inode, struct file *file) 481 { 482 unuse_gang(file->f_path.dentry); 483 return dcache_dir_close(inode, file); 484 } 485 486 static const struct file_operations spufs_gang_fops = { 487 .open = dcache_dir_open, 488 .release = spufs_gang_close, 489 .llseek = dcache_dir_lseek, 490 .read = generic_read_dir, 491 .iterate_shared = dcache_readdir, 492 .fsync = noop_fsync, 493 }; 494 495 static int spufs_gang_open(const struct path *path) 496 { 497 /* 498 * get references for dget and mntget, will be released 499 * in error path of *_open(). 500 */ 501 FD_PREPARE(fdf, 0, dentry_open(path, O_RDONLY, current_cred())); 502 if (fdf.err) 503 return fdf.err; 504 fd_prepare_file(fdf)->f_op = &spufs_gang_fops; 505 return fd_publish(fdf); 506 } 507 508 static int spufs_create_gang(struct inode *inode, 509 struct dentry *dentry, 510 struct vfsmount *mnt, umode_t mode) 511 { 512 struct path path = {.mnt = mnt, .dentry = dentry}; 513 int ret; 514 515 ret = spufs_mkgang(inode, dentry, mode & 0777); 516 if (!ret) { 517 ret = spufs_gang_open(&path); 518 if (ret < 0) 519 unuse_gang(dentry); 520 } 521 return ret; 522 } 523 524 525 static struct file_system_type spufs_type; 526 527 long spufs_create(const struct path *path, struct dentry *dentry, 528 unsigned int flags, umode_t mode, struct file *filp) 529 { 530 struct inode *dir = d_inode(path->dentry); 531 int ret; 532 533 /* check if we are on spufs */ 534 if (path->dentry->d_sb->s_type != &spufs_type) 535 return -EINVAL; 536 537 /* don't accept undefined flags */ 538 if (flags & (~SPU_CREATE_FLAG_ALL)) 539 return -EINVAL; 540 541 /* only threads can be underneath a gang */ 542 if (path->dentry != path->dentry->d_sb->s_root) 543 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 544 return -EINVAL; 545 546 mode &= ~current_umask(); 547 548 if (flags & SPU_CREATE_GANG) 549 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 550 else 551 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 552 filp); 553 if (ret >= 0) 554 fsnotify_mkdir(dir, dentry); 555 556 return ret; 557 } 558 559 /* File system initialization */ 560 struct spufs_fs_context { 561 kuid_t uid; 562 kgid_t gid; 563 umode_t mode; 564 }; 565 566 enum { 567 Opt_uid, Opt_gid, Opt_mode, Opt_debug, 568 }; 569 570 static const struct fs_parameter_spec spufs_fs_parameters[] = { 571 fsparam_u32 ("gid", Opt_gid), 572 fsparam_u32oct ("mode", Opt_mode), 573 fsparam_u32 ("uid", Opt_uid), 574 fsparam_flag ("debug", Opt_debug), 575 {} 576 }; 577 578 static int spufs_show_options(struct seq_file *m, struct dentry *root) 579 { 580 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 581 struct inode *inode = root->d_inode; 582 583 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 584 seq_printf(m, ",uid=%u", 585 from_kuid_munged(&init_user_ns, inode->i_uid)); 586 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 587 seq_printf(m, ",gid=%u", 588 from_kgid_munged(&init_user_ns, inode->i_gid)); 589 if ((inode->i_mode & S_IALLUGO) != 0775) 590 seq_printf(m, ",mode=%o", inode->i_mode); 591 if (sbi->debug) 592 seq_puts(m, ",debug"); 593 return 0; 594 } 595 596 static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param) 597 { 598 struct spufs_fs_context *ctx = fc->fs_private; 599 struct spufs_sb_info *sbi = fc->s_fs_info; 600 struct fs_parse_result result; 601 kuid_t uid; 602 kgid_t gid; 603 int opt; 604 605 opt = fs_parse(fc, spufs_fs_parameters, param, &result); 606 if (opt < 0) 607 return opt; 608 609 switch (opt) { 610 case Opt_uid: 611 uid = make_kuid(current_user_ns(), result.uint_32); 612 if (!uid_valid(uid)) 613 return invalf(fc, "Unknown uid"); 614 ctx->uid = uid; 615 break; 616 case Opt_gid: 617 gid = make_kgid(current_user_ns(), result.uint_32); 618 if (!gid_valid(gid)) 619 return invalf(fc, "Unknown gid"); 620 ctx->gid = gid; 621 break; 622 case Opt_mode: 623 ctx->mode = result.uint_32 & S_IALLUGO; 624 break; 625 case Opt_debug: 626 sbi->debug = true; 627 break; 628 } 629 630 return 0; 631 } 632 633 static void spufs_exit_isolated_loader(void) 634 { 635 free_pages((unsigned long) isolated_loader, 636 get_order(isolated_loader_size)); 637 } 638 639 static void __init 640 spufs_init_isolated_loader(void) 641 { 642 struct device_node *dn; 643 const char *loader; 644 int size; 645 646 dn = of_find_node_by_path("/spu-isolation"); 647 if (!dn) 648 return; 649 650 loader = of_get_property(dn, "loader", &size); 651 of_node_put(dn); 652 if (!loader) 653 return; 654 655 /* the loader must be align on a 16 byte boundary */ 656 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 657 if (!isolated_loader) 658 return; 659 660 isolated_loader_size = size; 661 memcpy(isolated_loader, loader, size); 662 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 663 } 664 665 static int spufs_create_root(struct super_block *sb, struct fs_context *fc) 666 { 667 struct spufs_fs_context *ctx = fc->fs_private; 668 struct inode *inode; 669 670 if (!spu_management_ops) 671 return -ENODEV; 672 673 inode = spufs_new_inode(sb, S_IFDIR | ctx->mode); 674 if (!inode) 675 return -ENOMEM; 676 677 inode->i_uid = ctx->uid; 678 inode->i_gid = ctx->gid; 679 inode->i_op = &simple_dir_inode_operations; 680 inode->i_fop = &simple_dir_operations; 681 SPUFS_I(inode)->i_ctx = NULL; 682 inc_nlink(inode); 683 684 sb->s_root = d_make_root(inode); 685 if (!sb->s_root) 686 return -ENOMEM; 687 return 0; 688 } 689 690 static const struct super_operations spufs_ops = { 691 .alloc_inode = spufs_alloc_inode, 692 .free_inode = spufs_free_inode, 693 .statfs = simple_statfs, 694 .evict_inode = spufs_evict_inode, 695 .show_options = spufs_show_options, 696 }; 697 698 static int spufs_fill_super(struct super_block *sb, struct fs_context *fc) 699 { 700 sb->s_maxbytes = MAX_LFS_FILESIZE; 701 sb->s_blocksize = PAGE_SIZE; 702 sb->s_blocksize_bits = PAGE_SHIFT; 703 sb->s_magic = SPUFS_MAGIC; 704 sb->s_op = &spufs_ops; 705 706 return spufs_create_root(sb, fc); 707 } 708 709 static int spufs_get_tree(struct fs_context *fc) 710 { 711 return get_tree_single(fc, spufs_fill_super); 712 } 713 714 static void spufs_free_fc(struct fs_context *fc) 715 { 716 kfree(fc->s_fs_info); 717 } 718 719 static const struct fs_context_operations spufs_context_ops = { 720 .free = spufs_free_fc, 721 .parse_param = spufs_parse_param, 722 .get_tree = spufs_get_tree, 723 }; 724 725 static int spufs_init_fs_context(struct fs_context *fc) 726 { 727 struct spufs_fs_context *ctx; 728 struct spufs_sb_info *sbi; 729 730 ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL); 731 if (!ctx) 732 goto nomem; 733 734 sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL); 735 if (!sbi) 736 goto nomem_ctx; 737 738 ctx->uid = current_uid(); 739 ctx->gid = current_gid(); 740 ctx->mode = 0755; 741 742 fc->fs_private = ctx; 743 fc->s_fs_info = sbi; 744 fc->ops = &spufs_context_ops; 745 return 0; 746 747 nomem_ctx: 748 kfree(ctx); 749 nomem: 750 return -ENOMEM; 751 } 752 753 static struct file_system_type spufs_type = { 754 .owner = THIS_MODULE, 755 .name = "spufs", 756 .init_fs_context = spufs_init_fs_context, 757 .parameters = spufs_fs_parameters, 758 .kill_sb = kill_anon_super, 759 }; 760 MODULE_ALIAS_FS("spufs"); 761 762 static int __init spufs_init(void) 763 { 764 int ret; 765 766 ret = -ENODEV; 767 if (!spu_management_ops) 768 goto out; 769 770 ret = -ENOMEM; 771 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 772 sizeof(struct spufs_inode_info), 0, 773 SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); 774 775 if (!spufs_inode_cache) 776 goto out; 777 ret = spu_sched_init(); 778 if (ret) 779 goto out_cache; 780 ret = register_spu_syscalls(&spufs_calls); 781 if (ret) 782 goto out_sched; 783 ret = register_filesystem(&spufs_type); 784 if (ret) 785 goto out_syscalls; 786 787 spufs_init_isolated_loader(); 788 789 return 0; 790 791 out_syscalls: 792 unregister_spu_syscalls(&spufs_calls); 793 out_sched: 794 spu_sched_exit(); 795 out_cache: 796 kmem_cache_destroy(spufs_inode_cache); 797 out: 798 return ret; 799 } 800 module_init(spufs_init); 801 802 static void __exit spufs_exit(void) 803 { 804 spu_sched_exit(); 805 spufs_exit_isolated_loader(); 806 unregister_spu_syscalls(&spufs_calls); 807 unregister_filesystem(&spufs_type); 808 kmem_cache_destroy(spufs_inode_cache); 809 } 810 module_exit(spufs_exit); 811 812 MODULE_DESCRIPTION("SPU file system"); 813 MODULE_LICENSE("GPL"); 814 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 815 816