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 inode *parent; 202 struct dentry *dir; 203 int ret; 204 205 dir = file->f_path.dentry; 206 parent = d_inode(dir->d_parent); 207 208 inode_lock_nested(parent, I_MUTEX_PARENT); 209 ret = spufs_rmdir(parent, dir); 210 inode_unlock(parent); 211 WARN_ON(ret); 212 213 return dcache_dir_close(inode, file); 214 } 215 216 const struct file_operations spufs_context_fops = { 217 .open = dcache_dir_open, 218 .release = spufs_dir_close, 219 .llseek = dcache_dir_lseek, 220 .read = generic_read_dir, 221 .iterate_shared = dcache_readdir, 222 .fsync = noop_fsync, 223 }; 224 EXPORT_SYMBOL_GPL(spufs_context_fops); 225 226 static int 227 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 228 umode_t mode) 229 { 230 int ret; 231 struct inode *inode; 232 struct spu_context *ctx; 233 234 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 235 if (!inode) 236 return -ENOSPC; 237 238 if (dir->i_mode & S_ISGID) { 239 inode->i_gid = dir->i_gid; 240 inode->i_mode &= S_ISGID; 241 } 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(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 if (dir->i_mode & S_ISGID) { 473 inode->i_gid = dir->i_gid; 474 inode->i_mode &= S_ISGID; 475 } 476 gang = alloc_spu_gang(); 477 SPUFS_I(inode)->i_ctx = NULL; 478 SPUFS_I(inode)->i_gang = gang; 479 if (!gang) { 480 ret = -ENOMEM; 481 goto out_iput; 482 } 483 484 inode->i_op = &simple_dir_inode_operations; 485 inode->i_fop = &simple_dir_operations; 486 487 d_instantiate(dentry, inode); 488 inc_nlink(dir); 489 inc_nlink(d_inode(dentry)); 490 return ret; 491 492 out_iput: 493 iput(inode); 494 out: 495 return ret; 496 } 497 498 static int spufs_gang_open(struct path *path) 499 { 500 int ret; 501 struct file *filp; 502 503 ret = get_unused_fd_flags(0); 504 if (ret < 0) 505 return ret; 506 507 /* 508 * get references for dget and mntget, will be released 509 * in error path of *_open(). 510 */ 511 filp = dentry_open(path, O_RDONLY, current_cred()); 512 if (IS_ERR(filp)) { 513 put_unused_fd(ret); 514 return PTR_ERR(filp); 515 } 516 517 filp->f_op = &simple_dir_operations; 518 fd_install(ret, filp); 519 return ret; 520 } 521 522 static int spufs_create_gang(struct inode *inode, 523 struct dentry *dentry, 524 struct vfsmount *mnt, umode_t mode) 525 { 526 struct path path = {.mnt = mnt, .dentry = dentry}; 527 int ret; 528 529 ret = spufs_mkgang(inode, dentry, mode & 0777); 530 if (!ret) { 531 ret = spufs_gang_open(&path); 532 if (ret < 0) { 533 int err = simple_rmdir(inode, dentry); 534 WARN_ON(err); 535 } 536 } 537 return ret; 538 } 539 540 541 static struct file_system_type spufs_type; 542 543 long spufs_create(struct path *path, struct dentry *dentry, 544 unsigned int flags, umode_t mode, struct file *filp) 545 { 546 struct inode *dir = d_inode(path->dentry); 547 int ret; 548 549 /* check if we are on spufs */ 550 if (path->dentry->d_sb->s_type != &spufs_type) 551 return -EINVAL; 552 553 /* don't accept undefined flags */ 554 if (flags & (~SPU_CREATE_FLAG_ALL)) 555 return -EINVAL; 556 557 /* only threads can be underneath a gang */ 558 if (path->dentry != path->dentry->d_sb->s_root) 559 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 560 return -EINVAL; 561 562 mode &= ~current_umask(); 563 564 if (flags & SPU_CREATE_GANG) 565 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 566 else 567 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 568 filp); 569 if (ret >= 0) 570 fsnotify_mkdir(dir, dentry); 571 572 return ret; 573 } 574 575 /* File system initialization */ 576 struct spufs_fs_context { 577 kuid_t uid; 578 kgid_t gid; 579 umode_t mode; 580 }; 581 582 enum { 583 Opt_uid, Opt_gid, Opt_mode, Opt_debug, 584 }; 585 586 static const struct fs_parameter_spec spufs_param_specs[] = { 587 fsparam_u32 ("gid", Opt_gid), 588 fsparam_u32oct ("mode", Opt_mode), 589 fsparam_u32 ("uid", Opt_uid), 590 fsparam_flag ("debug", Opt_debug), 591 {} 592 }; 593 594 static const struct fs_parameter_description spufs_fs_parameters = { 595 .name = "spufs", 596 .specs = spufs_param_specs, 597 }; 598 599 static int spufs_show_options(struct seq_file *m, struct dentry *root) 600 { 601 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 602 struct inode *inode = root->d_inode; 603 604 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 605 seq_printf(m, ",uid=%u", 606 from_kuid_munged(&init_user_ns, inode->i_uid)); 607 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 608 seq_printf(m, ",gid=%u", 609 from_kgid_munged(&init_user_ns, inode->i_gid)); 610 if ((inode->i_mode & S_IALLUGO) != 0775) 611 seq_printf(m, ",mode=%o", inode->i_mode); 612 if (sbi->debug) 613 seq_puts(m, ",debug"); 614 return 0; 615 } 616 617 static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param) 618 { 619 struct spufs_fs_context *ctx = fc->fs_private; 620 struct spufs_sb_info *sbi = fc->s_fs_info; 621 struct fs_parse_result result; 622 kuid_t uid; 623 kgid_t gid; 624 int opt; 625 626 opt = fs_parse(fc, &spufs_fs_parameters, param, &result); 627 if (opt < 0) 628 return opt; 629 630 switch (opt) { 631 case Opt_uid: 632 uid = make_kuid(current_user_ns(), result.uint_32); 633 if (!uid_valid(uid)) 634 return invalf(fc, "Unknown uid"); 635 ctx->uid = uid; 636 break; 637 case Opt_gid: 638 gid = make_kgid(current_user_ns(), result.uint_32); 639 if (!gid_valid(gid)) 640 return invalf(fc, "Unknown gid"); 641 ctx->gid = gid; 642 break; 643 case Opt_mode: 644 ctx->mode = result.uint_32 & S_IALLUGO; 645 break; 646 case Opt_debug: 647 sbi->debug = true; 648 break; 649 } 650 651 return 0; 652 } 653 654 static void spufs_exit_isolated_loader(void) 655 { 656 free_pages((unsigned long) isolated_loader, 657 get_order(isolated_loader_size)); 658 } 659 660 static void 661 spufs_init_isolated_loader(void) 662 { 663 struct device_node *dn; 664 const char *loader; 665 int size; 666 667 dn = of_find_node_by_path("/spu-isolation"); 668 if (!dn) 669 return; 670 671 loader = of_get_property(dn, "loader", &size); 672 if (!loader) 673 return; 674 675 /* the loader must be align on a 16 byte boundary */ 676 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 677 if (!isolated_loader) 678 return; 679 680 isolated_loader_size = size; 681 memcpy(isolated_loader, loader, size); 682 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 683 } 684 685 static int spufs_create_root(struct super_block *sb, struct fs_context *fc) 686 { 687 struct spufs_fs_context *ctx = fc->fs_private; 688 struct inode *inode; 689 690 if (!spu_management_ops) 691 return -ENODEV; 692 693 inode = spufs_new_inode(sb, S_IFDIR | ctx->mode); 694 if (!inode) 695 return -ENOMEM; 696 697 inode->i_uid = ctx->uid; 698 inode->i_gid = ctx->gid; 699 inode->i_op = &simple_dir_inode_operations; 700 inode->i_fop = &simple_dir_operations; 701 SPUFS_I(inode)->i_ctx = NULL; 702 inc_nlink(inode); 703 704 sb->s_root = d_make_root(inode); 705 if (!sb->s_root) 706 return -ENOMEM; 707 return 0; 708 } 709 710 static const struct super_operations spufs_ops = { 711 .alloc_inode = spufs_alloc_inode, 712 .free_inode = spufs_free_inode, 713 .statfs = simple_statfs, 714 .evict_inode = spufs_evict_inode, 715 .show_options = spufs_show_options, 716 }; 717 718 static int spufs_fill_super(struct super_block *sb, struct fs_context *fc) 719 { 720 sb->s_maxbytes = MAX_LFS_FILESIZE; 721 sb->s_blocksize = PAGE_SIZE; 722 sb->s_blocksize_bits = PAGE_SHIFT; 723 sb->s_magic = SPUFS_MAGIC; 724 sb->s_op = &spufs_ops; 725 726 return spufs_create_root(sb, fc); 727 } 728 729 static int spufs_get_tree(struct fs_context *fc) 730 { 731 return get_tree_single(fc, spufs_fill_super); 732 } 733 734 static void spufs_free_fc(struct fs_context *fc) 735 { 736 kfree(fc->s_fs_info); 737 } 738 739 static const struct fs_context_operations spufs_context_ops = { 740 .free = spufs_free_fc, 741 .parse_param = spufs_parse_param, 742 .get_tree = spufs_get_tree, 743 }; 744 745 static int spufs_init_fs_context(struct fs_context *fc) 746 { 747 struct spufs_fs_context *ctx; 748 struct spufs_sb_info *sbi; 749 750 ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL); 751 if (!ctx) 752 goto nomem; 753 754 sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL); 755 if (!sbi) 756 goto nomem_ctx; 757 758 ctx->uid = current_uid(); 759 ctx->gid = current_gid(); 760 ctx->mode = 0755; 761 762 fc->fs_private = ctx; 763 fc->s_fs_info = sbi; 764 fc->ops = &spufs_context_ops; 765 return 0; 766 767 nomem_ctx: 768 kfree(ctx); 769 nomem: 770 return -ENOMEM; 771 } 772 773 static struct file_system_type spufs_type = { 774 .owner = THIS_MODULE, 775 .name = "spufs", 776 .init_fs_context = spufs_init_fs_context, 777 .parameters = &spufs_fs_parameters, 778 .kill_sb = kill_litter_super, 779 }; 780 MODULE_ALIAS_FS("spufs"); 781 782 static int __init spufs_init(void) 783 { 784 int ret; 785 786 ret = -ENODEV; 787 if (!spu_management_ops) 788 goto out; 789 790 ret = -ENOMEM; 791 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 792 sizeof(struct spufs_inode_info), 0, 793 SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); 794 795 if (!spufs_inode_cache) 796 goto out; 797 ret = spu_sched_init(); 798 if (ret) 799 goto out_cache; 800 ret = register_spu_syscalls(&spufs_calls); 801 if (ret) 802 goto out_sched; 803 ret = register_filesystem(&spufs_type); 804 if (ret) 805 goto out_syscalls; 806 807 spufs_init_isolated_loader(); 808 809 return 0; 810 811 out_syscalls: 812 unregister_spu_syscalls(&spufs_calls); 813 out_sched: 814 spu_sched_exit(); 815 out_cache: 816 kmem_cache_destroy(spufs_inode_cache); 817 out: 818 return ret; 819 } 820 module_init(spufs_init); 821 822 static void __exit spufs_exit(void) 823 { 824 spu_sched_exit(); 825 spufs_exit_isolated_loader(); 826 unregister_spu_syscalls(&spufs_calls); 827 unregister_filesystem(&spufs_type); 828 kmem_cache_destroy(spufs_inode_cache); 829 } 830 module_exit(spufs_exit); 831 832 MODULE_LICENSE("GPL"); 833 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 834 835