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 /* 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 if (ret) { 167 dput(dentry); 168 return ret; 169 } 170 files++; 171 } 172 return 0; 173 } 174 175 static void unuse_gang(struct dentry *dir) 176 { 177 struct inode *inode = dir->d_inode; 178 struct spu_gang *gang = SPUFS_I(inode)->i_gang; 179 180 if (gang) { 181 bool dead; 182 183 inode_lock(inode); // exclusion with spufs_create_context() 184 dead = !--gang->alive; 185 inode_unlock(inode); 186 187 if (dead) 188 simple_recursive_removal(dir, NULL); 189 } 190 } 191 192 static int spufs_dir_close(struct inode *inode, struct file *file) 193 { 194 struct inode *parent; 195 struct dentry *dir; 196 197 dir = file->f_path.dentry; 198 parent = d_inode(dir->d_parent); 199 200 inode_lock_nested(parent, I_MUTEX_PARENT); 201 spufs_rmdir(parent, dir); 202 inode_unlock(parent); 203 204 unuse_gang(dir->d_parent); 205 return dcache_dir_close(inode, file); 206 } 207 208 const struct file_operations spufs_context_fops = { 209 .open = dcache_dir_open, 210 .release = spufs_dir_close, 211 .llseek = dcache_dir_lseek, 212 .read = generic_read_dir, 213 .iterate_shared = dcache_readdir, 214 .fsync = noop_fsync, 215 }; 216 EXPORT_SYMBOL_GPL(spufs_context_fops); 217 218 static int 219 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 220 umode_t mode) 221 { 222 int ret; 223 struct inode *inode; 224 struct spu_context *ctx; 225 226 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 227 if (!inode) 228 return -ENOSPC; 229 230 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 231 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 232 SPUFS_I(inode)->i_ctx = ctx; 233 if (!ctx) { 234 iput(inode); 235 return -ENOSPC; 236 } 237 238 ctx->flags = flags; 239 inode->i_op = &simple_dir_inode_operations; 240 inode->i_fop = &simple_dir_operations; 241 242 inode_lock(inode); 243 244 dget(dentry); 245 inc_nlink(dir); 246 inc_nlink(inode); 247 248 d_instantiate(dentry, inode); 249 250 if (flags & SPU_CREATE_NOSCHED) 251 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 252 mode, ctx); 253 else 254 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 255 256 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 257 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 258 mode, ctx); 259 260 inode_unlock(inode); 261 262 if (ret) 263 spufs_rmdir(dir, dentry); 264 265 return ret; 266 } 267 268 static int spufs_context_open(const struct path *path) 269 { 270 int ret; 271 struct file *filp; 272 273 ret = get_unused_fd_flags(0); 274 if (ret < 0) 275 return ret; 276 277 filp = dentry_open(path, O_RDONLY, current_cred()); 278 if (IS_ERR(filp)) { 279 put_unused_fd(ret); 280 return PTR_ERR(filp); 281 } 282 283 filp->f_op = &spufs_context_fops; 284 fd_install(ret, filp); 285 return ret; 286 } 287 288 static struct spu_context * 289 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 290 struct file *filp) 291 { 292 struct spu_context *tmp, *neighbor, *err; 293 int count, node; 294 int aff_supp; 295 296 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 297 struct spu, cbe_list))->aff_list); 298 299 if (!aff_supp) 300 return ERR_PTR(-EINVAL); 301 302 if (flags & SPU_CREATE_GANG) 303 return ERR_PTR(-EINVAL); 304 305 if (flags & SPU_CREATE_AFFINITY_MEM && 306 gang->aff_ref_ctx && 307 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 308 return ERR_PTR(-EEXIST); 309 310 if (gang->aff_flags & AFF_MERGED) 311 return ERR_PTR(-EBUSY); 312 313 neighbor = NULL; 314 if (flags & SPU_CREATE_AFFINITY_SPU) { 315 if (!filp || filp->f_op != &spufs_context_fops) 316 return ERR_PTR(-EINVAL); 317 318 neighbor = get_spu_context( 319 SPUFS_I(file_inode(filp))->i_ctx); 320 321 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 322 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 323 !list_entry(neighbor->aff_list.next, struct spu_context, 324 aff_list)->aff_head) { 325 err = ERR_PTR(-EEXIST); 326 goto out_put_neighbor; 327 } 328 329 if (gang != neighbor->gang) { 330 err = ERR_PTR(-EINVAL); 331 goto out_put_neighbor; 332 } 333 334 count = 1; 335 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 336 count++; 337 if (list_empty(&neighbor->aff_list)) 338 count++; 339 340 for (node = 0; node < MAX_NUMNODES; node++) { 341 if ((cbe_spu_info[node].n_spus - atomic_read( 342 &cbe_spu_info[node].reserved_spus)) >= count) 343 break; 344 } 345 346 if (node == MAX_NUMNODES) { 347 err = ERR_PTR(-EEXIST); 348 goto out_put_neighbor; 349 } 350 } 351 352 return neighbor; 353 354 out_put_neighbor: 355 put_spu_context(neighbor); 356 return err; 357 } 358 359 static void 360 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 361 struct spu_context *neighbor) 362 { 363 if (flags & SPU_CREATE_AFFINITY_MEM) 364 ctx->gang->aff_ref_ctx = ctx; 365 366 if (flags & SPU_CREATE_AFFINITY_SPU) { 367 if (list_empty(&neighbor->aff_list)) { 368 list_add_tail(&neighbor->aff_list, 369 &ctx->gang->aff_list_head); 370 neighbor->aff_head = 1; 371 } 372 373 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 374 || list_entry(neighbor->aff_list.next, struct spu_context, 375 aff_list)->aff_head) { 376 list_add(&ctx->aff_list, &neighbor->aff_list); 377 } else { 378 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 379 if (neighbor->aff_head) { 380 neighbor->aff_head = 0; 381 ctx->aff_head = 1; 382 } 383 } 384 385 if (!ctx->gang->aff_ref_ctx) 386 ctx->gang->aff_ref_ctx = ctx; 387 } 388 } 389 390 static int 391 spufs_create_context(struct inode *inode, struct dentry *dentry, 392 struct vfsmount *mnt, int flags, umode_t mode, 393 struct file *aff_filp) 394 { 395 int ret; 396 int affinity; 397 struct spu_gang *gang = SPUFS_I(inode)->i_gang; 398 struct spu_context *neighbor; 399 struct path path = {.mnt = mnt, .dentry = dentry}; 400 401 if ((flags & SPU_CREATE_NOSCHED) && 402 !capable(CAP_SYS_NICE)) 403 return -EPERM; 404 405 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 406 == SPU_CREATE_ISOLATE) 407 return -EINVAL; 408 409 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 410 return -ENODEV; 411 412 if (gang) { 413 if (!gang->alive) 414 return -ENOENT; 415 gang->alive++; 416 } 417 418 neighbor = NULL; 419 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 420 if (affinity) { 421 if (!gang) 422 return -EINVAL; 423 mutex_lock(&gang->aff_mutex); 424 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 425 if (IS_ERR(neighbor)) { 426 ret = PTR_ERR(neighbor); 427 goto out_aff_unlock; 428 } 429 } 430 431 ret = spufs_mkdir(inode, dentry, flags, mode & 0777); 432 if (ret) { 433 if (neighbor) 434 put_spu_context(neighbor); 435 goto out_aff_unlock; 436 } 437 438 if (affinity) { 439 spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, 440 neighbor); 441 if (neighbor) 442 put_spu_context(neighbor); 443 } 444 445 ret = spufs_context_open(&path); 446 if (ret < 0) 447 spufs_rmdir(inode, dentry); 448 449 out_aff_unlock: 450 if (affinity) 451 mutex_unlock(&gang->aff_mutex); 452 if (ret && gang) 453 gang->alive--; // can't reach 0 454 return ret; 455 } 456 457 static int 458 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 459 { 460 int ret; 461 struct inode *inode; 462 struct spu_gang *gang; 463 464 ret = -ENOSPC; 465 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 466 if (!inode) 467 goto out; 468 469 ret = 0; 470 inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR); 471 gang = alloc_spu_gang(); 472 SPUFS_I(inode)->i_ctx = NULL; 473 SPUFS_I(inode)->i_gang = gang; 474 if (!gang) { 475 ret = -ENOMEM; 476 goto out_iput; 477 } 478 479 inode->i_op = &simple_dir_inode_operations; 480 inode->i_fop = &simple_dir_operations; 481 482 d_instantiate(dentry, inode); 483 dget(dentry); 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_close(struct inode *inode, struct file *file) 495 { 496 unuse_gang(file->f_path.dentry); 497 return dcache_dir_close(inode, file); 498 } 499 500 static const struct file_operations spufs_gang_fops = { 501 .open = dcache_dir_open, 502 .release = spufs_gang_close, 503 .llseek = dcache_dir_lseek, 504 .read = generic_read_dir, 505 .iterate_shared = dcache_readdir, 506 .fsync = noop_fsync, 507 }; 508 509 static int spufs_gang_open(const struct path *path) 510 { 511 int ret; 512 struct file *filp; 513 514 ret = get_unused_fd_flags(0); 515 if (ret < 0) 516 return ret; 517 518 /* 519 * get references for dget and mntget, will be released 520 * in error path of *_open(). 521 */ 522 filp = dentry_open(path, O_RDONLY, current_cred()); 523 if (IS_ERR(filp)) { 524 put_unused_fd(ret); 525 return PTR_ERR(filp); 526 } 527 528 filp->f_op = &spufs_gang_fops; 529 fd_install(ret, filp); 530 return ret; 531 } 532 533 static int spufs_create_gang(struct inode *inode, 534 struct dentry *dentry, 535 struct vfsmount *mnt, umode_t mode) 536 { 537 struct path path = {.mnt = mnt, .dentry = dentry}; 538 int ret; 539 540 ret = spufs_mkgang(inode, dentry, mode & 0777); 541 if (!ret) { 542 ret = spufs_gang_open(&path); 543 if (ret < 0) 544 unuse_gang(dentry); 545 } 546 return ret; 547 } 548 549 550 static struct file_system_type spufs_type; 551 552 long spufs_create(const struct path *path, struct dentry *dentry, 553 unsigned int flags, umode_t mode, struct file *filp) 554 { 555 struct inode *dir = d_inode(path->dentry); 556 int ret; 557 558 /* check if we are on spufs */ 559 if (path->dentry->d_sb->s_type != &spufs_type) 560 return -EINVAL; 561 562 /* don't accept undefined flags */ 563 if (flags & (~SPU_CREATE_FLAG_ALL)) 564 return -EINVAL; 565 566 /* only threads can be underneath a gang */ 567 if (path->dentry != path->dentry->d_sb->s_root) 568 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 569 return -EINVAL; 570 571 mode &= ~current_umask(); 572 573 if (flags & SPU_CREATE_GANG) 574 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 575 else 576 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 577 filp); 578 if (ret >= 0) 579 fsnotify_mkdir(dir, dentry); 580 581 return ret; 582 } 583 584 /* File system initialization */ 585 struct spufs_fs_context { 586 kuid_t uid; 587 kgid_t gid; 588 umode_t mode; 589 }; 590 591 enum { 592 Opt_uid, Opt_gid, Opt_mode, Opt_debug, 593 }; 594 595 static const struct fs_parameter_spec spufs_fs_parameters[] = { 596 fsparam_u32 ("gid", Opt_gid), 597 fsparam_u32oct ("mode", Opt_mode), 598 fsparam_u32 ("uid", Opt_uid), 599 fsparam_flag ("debug", Opt_debug), 600 {} 601 }; 602 603 static int spufs_show_options(struct seq_file *m, struct dentry *root) 604 { 605 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 606 struct inode *inode = root->d_inode; 607 608 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 609 seq_printf(m, ",uid=%u", 610 from_kuid_munged(&init_user_ns, inode->i_uid)); 611 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 612 seq_printf(m, ",gid=%u", 613 from_kgid_munged(&init_user_ns, inode->i_gid)); 614 if ((inode->i_mode & S_IALLUGO) != 0775) 615 seq_printf(m, ",mode=%o", inode->i_mode); 616 if (sbi->debug) 617 seq_puts(m, ",debug"); 618 return 0; 619 } 620 621 static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param) 622 { 623 struct spufs_fs_context *ctx = fc->fs_private; 624 struct spufs_sb_info *sbi = fc->s_fs_info; 625 struct fs_parse_result result; 626 kuid_t uid; 627 kgid_t gid; 628 int opt; 629 630 opt = fs_parse(fc, spufs_fs_parameters, param, &result); 631 if (opt < 0) 632 return opt; 633 634 switch (opt) { 635 case Opt_uid: 636 uid = make_kuid(current_user_ns(), result.uint_32); 637 if (!uid_valid(uid)) 638 return invalf(fc, "Unknown uid"); 639 ctx->uid = uid; 640 break; 641 case Opt_gid: 642 gid = make_kgid(current_user_ns(), result.uint_32); 643 if (!gid_valid(gid)) 644 return invalf(fc, "Unknown gid"); 645 ctx->gid = gid; 646 break; 647 case Opt_mode: 648 ctx->mode = result.uint_32 & S_IALLUGO; 649 break; 650 case Opt_debug: 651 sbi->debug = true; 652 break; 653 } 654 655 return 0; 656 } 657 658 static void spufs_exit_isolated_loader(void) 659 { 660 free_pages((unsigned long) isolated_loader, 661 get_order(isolated_loader_size)); 662 } 663 664 static void __init 665 spufs_init_isolated_loader(void) 666 { 667 struct device_node *dn; 668 const char *loader; 669 int size; 670 671 dn = of_find_node_by_path("/spu-isolation"); 672 if (!dn) 673 return; 674 675 loader = of_get_property(dn, "loader", &size); 676 of_node_put(dn); 677 if (!loader) 678 return; 679 680 /* the loader must be align on a 16 byte boundary */ 681 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 682 if (!isolated_loader) 683 return; 684 685 isolated_loader_size = size; 686 memcpy(isolated_loader, loader, size); 687 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 688 } 689 690 static int spufs_create_root(struct super_block *sb, struct fs_context *fc) 691 { 692 struct spufs_fs_context *ctx = fc->fs_private; 693 struct inode *inode; 694 695 if (!spu_management_ops) 696 return -ENODEV; 697 698 inode = spufs_new_inode(sb, S_IFDIR | ctx->mode); 699 if (!inode) 700 return -ENOMEM; 701 702 inode->i_uid = ctx->uid; 703 inode->i_gid = ctx->gid; 704 inode->i_op = &simple_dir_inode_operations; 705 inode->i_fop = &simple_dir_operations; 706 SPUFS_I(inode)->i_ctx = NULL; 707 inc_nlink(inode); 708 709 sb->s_root = d_make_root(inode); 710 if (!sb->s_root) 711 return -ENOMEM; 712 return 0; 713 } 714 715 static const struct super_operations spufs_ops = { 716 .alloc_inode = spufs_alloc_inode, 717 .free_inode = spufs_free_inode, 718 .statfs = simple_statfs, 719 .evict_inode = spufs_evict_inode, 720 .show_options = spufs_show_options, 721 }; 722 723 static int spufs_fill_super(struct super_block *sb, struct fs_context *fc) 724 { 725 sb->s_maxbytes = MAX_LFS_FILESIZE; 726 sb->s_blocksize = PAGE_SIZE; 727 sb->s_blocksize_bits = PAGE_SHIFT; 728 sb->s_magic = SPUFS_MAGIC; 729 sb->s_op = &spufs_ops; 730 731 return spufs_create_root(sb, fc); 732 } 733 734 static int spufs_get_tree(struct fs_context *fc) 735 { 736 return get_tree_single(fc, spufs_fill_super); 737 } 738 739 static void spufs_free_fc(struct fs_context *fc) 740 { 741 kfree(fc->s_fs_info); 742 } 743 744 static const struct fs_context_operations spufs_context_ops = { 745 .free = spufs_free_fc, 746 .parse_param = spufs_parse_param, 747 .get_tree = spufs_get_tree, 748 }; 749 750 static int spufs_init_fs_context(struct fs_context *fc) 751 { 752 struct spufs_fs_context *ctx; 753 struct spufs_sb_info *sbi; 754 755 ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL); 756 if (!ctx) 757 goto nomem; 758 759 sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL); 760 if (!sbi) 761 goto nomem_ctx; 762 763 ctx->uid = current_uid(); 764 ctx->gid = current_gid(); 765 ctx->mode = 0755; 766 767 fc->fs_private = ctx; 768 fc->s_fs_info = sbi; 769 fc->ops = &spufs_context_ops; 770 return 0; 771 772 nomem_ctx: 773 kfree(ctx); 774 nomem: 775 return -ENOMEM; 776 } 777 778 static struct file_system_type spufs_type = { 779 .owner = THIS_MODULE, 780 .name = "spufs", 781 .init_fs_context = spufs_init_fs_context, 782 .parameters = spufs_fs_parameters, 783 .kill_sb = kill_litter_super, 784 }; 785 MODULE_ALIAS_FS("spufs"); 786 787 static int __init spufs_init(void) 788 { 789 int ret; 790 791 ret = -ENODEV; 792 if (!spu_management_ops) 793 goto out; 794 795 ret = -ENOMEM; 796 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 797 sizeof(struct spufs_inode_info), 0, 798 SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); 799 800 if (!spufs_inode_cache) 801 goto out; 802 ret = spu_sched_init(); 803 if (ret) 804 goto out_cache; 805 ret = register_spu_syscalls(&spufs_calls); 806 if (ret) 807 goto out_sched; 808 ret = register_filesystem(&spufs_type); 809 if (ret) 810 goto out_syscalls; 811 812 spufs_init_isolated_loader(); 813 814 return 0; 815 816 out_syscalls: 817 unregister_spu_syscalls(&spufs_calls); 818 out_sched: 819 spu_sched_exit(); 820 out_cache: 821 kmem_cache_destroy(spufs_inode_cache); 822 out: 823 return ret; 824 } 825 module_init(spufs_init); 826 827 static void __exit spufs_exit(void) 828 { 829 spu_sched_exit(); 830 spufs_exit_isolated_loader(); 831 unregister_spu_syscalls(&spufs_calls); 832 unregister_filesystem(&spufs_type); 833 kmem_cache_destroy(spufs_inode_cache); 834 } 835 module_exit(spufs_exit); 836 837 MODULE_DESCRIPTION("SPU file system"); 838 MODULE_LICENSE("GPL"); 839 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 840 841