1 2 /* 3 * SPU file system 4 * 5 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 6 * 7 * Author: Arnd Bergmann <arndb@de.ibm.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 */ 23 24 #include <linux/file.h> 25 #include <linux/fs.h> 26 #include <linux/fsnotify.h> 27 #include <linux/backing-dev.h> 28 #include <linux/init.h> 29 #include <linux/ioctl.h> 30 #include <linux/module.h> 31 #include <linux/mount.h> 32 #include <linux/namei.h> 33 #include <linux/pagemap.h> 34 #include <linux/poll.h> 35 #include <linux/slab.h> 36 #include <linux/parser.h> 37 38 #include <asm/prom.h> 39 #include <asm/spu.h> 40 #include <asm/spu_priv1.h> 41 #include <asm/uaccess.h> 42 43 #include "spufs.h" 44 45 struct spufs_sb_info { 46 int debug; 47 }; 48 49 static struct kmem_cache *spufs_inode_cache; 50 char *isolated_loader; 51 static int isolated_loader_size; 52 53 static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) 54 { 55 return sb->s_fs_info; 56 } 57 58 static struct inode * 59 spufs_alloc_inode(struct super_block *sb) 60 { 61 struct spufs_inode_info *ei; 62 63 ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 64 if (!ei) 65 return NULL; 66 67 ei->i_gang = NULL; 68 ei->i_ctx = NULL; 69 ei->i_openers = 0; 70 71 return &ei->vfs_inode; 72 } 73 74 static void 75 spufs_destroy_inode(struct inode *inode) 76 { 77 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 78 } 79 80 static void 81 spufs_init_once(void *p) 82 { 83 struct spufs_inode_info *ei = p; 84 85 inode_init_once(&ei->vfs_inode); 86 } 87 88 static struct inode * 89 spufs_new_inode(struct super_block *sb, int mode) 90 { 91 struct inode *inode; 92 93 inode = new_inode(sb); 94 if (!inode) 95 goto out; 96 97 inode->i_mode = mode; 98 inode->i_uid = current_fsuid(); 99 inode->i_gid = current_fsgid(); 100 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 101 out: 102 return inode; 103 } 104 105 static int 106 spufs_setattr(struct dentry *dentry, struct iattr *attr) 107 { 108 struct inode *inode = dentry->d_inode; 109 110 if ((attr->ia_valid & ATTR_SIZE) && 111 (attr->ia_size != inode->i_size)) 112 return -EINVAL; 113 return inode_setattr(inode, attr); 114 } 115 116 117 static int 118 spufs_new_file(struct super_block *sb, struct dentry *dentry, 119 const struct file_operations *fops, int mode, 120 size_t size, struct spu_context *ctx) 121 { 122 static const struct inode_operations spufs_file_iops = { 123 .setattr = spufs_setattr, 124 }; 125 struct inode *inode; 126 int ret; 127 128 ret = -ENOSPC; 129 inode = spufs_new_inode(sb, S_IFREG | mode); 130 if (!inode) 131 goto out; 132 133 ret = 0; 134 inode->i_op = &spufs_file_iops; 135 inode->i_fop = fops; 136 inode->i_size = size; 137 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 138 d_add(dentry, inode); 139 out: 140 return ret; 141 } 142 143 static void 144 spufs_delete_inode(struct inode *inode) 145 { 146 struct spufs_inode_info *ei = SPUFS_I(inode); 147 148 if (ei->i_ctx) 149 put_spu_context(ei->i_ctx); 150 if (ei->i_gang) 151 put_spu_gang(ei->i_gang); 152 clear_inode(inode); 153 } 154 155 static void spufs_prune_dir(struct dentry *dir) 156 { 157 struct dentry *dentry, *tmp; 158 159 mutex_lock(&dir->d_inode->i_mutex); 160 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 161 spin_lock(&dcache_lock); 162 spin_lock(&dentry->d_lock); 163 if (!(d_unhashed(dentry)) && dentry->d_inode) { 164 dget_locked(dentry); 165 __d_drop(dentry); 166 spin_unlock(&dentry->d_lock); 167 simple_unlink(dir->d_inode, dentry); 168 spin_unlock(&dcache_lock); 169 dput(dentry); 170 } else { 171 spin_unlock(&dentry->d_lock); 172 spin_unlock(&dcache_lock); 173 } 174 } 175 shrink_dcache_parent(dir); 176 mutex_unlock(&dir->d_inode->i_mutex); 177 } 178 179 /* Caller must hold parent->i_mutex */ 180 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 181 { 182 /* remove all entries */ 183 spufs_prune_dir(dir); 184 d_drop(dir); 185 186 return simple_rmdir(parent, dir); 187 } 188 189 static int spufs_fill_dir(struct dentry *dir, 190 const struct spufs_tree_descr *files, int mode, 191 struct spu_context *ctx) 192 { 193 struct dentry *dentry, *tmp; 194 int ret; 195 196 while (files->name && files->name[0]) { 197 ret = -ENOMEM; 198 dentry = d_alloc_name(dir, files->name); 199 if (!dentry) 200 goto out; 201 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 202 files->mode & mode, files->size, ctx); 203 if (ret) 204 goto out; 205 files++; 206 } 207 return 0; 208 out: 209 /* 210 * remove all children from dir. dir->inode is not set so don't 211 * just simply use spufs_prune_dir() and panic afterwards :) 212 * dput() looks like it will do the right thing: 213 * - dec parent's ref counter 214 * - remove child from parent's child list 215 * - free child's inode if possible 216 * - free child 217 */ 218 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 219 dput(dentry); 220 } 221 222 shrink_dcache_parent(dir); 223 return ret; 224 } 225 226 static int spufs_dir_close(struct inode *inode, struct file *file) 227 { 228 struct spu_context *ctx; 229 struct inode *parent; 230 struct dentry *dir; 231 int ret; 232 233 dir = file->f_path.dentry; 234 parent = dir->d_parent->d_inode; 235 ctx = SPUFS_I(dir->d_inode)->i_ctx; 236 237 mutex_lock_nested(&parent->i_mutex, I_MUTEX_PARENT); 238 ret = spufs_rmdir(parent, dir); 239 mutex_unlock(&parent->i_mutex); 240 WARN_ON(ret); 241 242 /* We have to give up the mm_struct */ 243 spu_forget(ctx); 244 245 return dcache_dir_close(inode, file); 246 } 247 248 const struct file_operations spufs_context_fops = { 249 .open = dcache_dir_open, 250 .release = spufs_dir_close, 251 .llseek = dcache_dir_lseek, 252 .read = generic_read_dir, 253 .readdir = dcache_readdir, 254 .fsync = simple_sync_file, 255 }; 256 EXPORT_SYMBOL_GPL(spufs_context_fops); 257 258 static int 259 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 260 int mode) 261 { 262 int ret; 263 struct inode *inode; 264 struct spu_context *ctx; 265 266 ret = -ENOSPC; 267 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 268 if (!inode) 269 goto out; 270 271 if (dir->i_mode & S_ISGID) { 272 inode->i_gid = dir->i_gid; 273 inode->i_mode &= S_ISGID; 274 } 275 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 276 SPUFS_I(inode)->i_ctx = ctx; 277 if (!ctx) 278 goto out_iput; 279 280 ctx->flags = flags; 281 inode->i_op = &simple_dir_inode_operations; 282 inode->i_fop = &simple_dir_operations; 283 if (flags & SPU_CREATE_NOSCHED) 284 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 285 mode, ctx); 286 else 287 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 288 289 if (ret) 290 goto out_free_ctx; 291 292 if (spufs_get_sb_info(dir->i_sb)->debug) 293 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 294 mode, ctx); 295 296 if (ret) 297 goto out_free_ctx; 298 299 d_instantiate(dentry, inode); 300 dget(dentry); 301 inc_nlink(dir); 302 inc_nlink(dentry->d_inode); 303 goto out; 304 305 out_free_ctx: 306 spu_forget(ctx); 307 put_spu_context(ctx); 308 out_iput: 309 iput(inode); 310 out: 311 return ret; 312 } 313 314 static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) 315 { 316 int ret; 317 struct file *filp; 318 319 ret = get_unused_fd(); 320 if (ret < 0) { 321 dput(dentry); 322 mntput(mnt); 323 goto out; 324 } 325 326 filp = dentry_open(dentry, mnt, O_RDONLY, current_cred()); 327 if (IS_ERR(filp)) { 328 put_unused_fd(ret); 329 ret = PTR_ERR(filp); 330 goto out; 331 } 332 333 filp->f_op = &spufs_context_fops; 334 fd_install(ret, filp); 335 out: 336 return ret; 337 } 338 339 static struct spu_context * 340 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 341 struct file *filp) 342 { 343 struct spu_context *tmp, *neighbor, *err; 344 int count, node; 345 int aff_supp; 346 347 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 348 struct spu, cbe_list))->aff_list); 349 350 if (!aff_supp) 351 return ERR_PTR(-EINVAL); 352 353 if (flags & SPU_CREATE_GANG) 354 return ERR_PTR(-EINVAL); 355 356 if (flags & SPU_CREATE_AFFINITY_MEM && 357 gang->aff_ref_ctx && 358 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 359 return ERR_PTR(-EEXIST); 360 361 if (gang->aff_flags & AFF_MERGED) 362 return ERR_PTR(-EBUSY); 363 364 neighbor = NULL; 365 if (flags & SPU_CREATE_AFFINITY_SPU) { 366 if (!filp || filp->f_op != &spufs_context_fops) 367 return ERR_PTR(-EINVAL); 368 369 neighbor = get_spu_context( 370 SPUFS_I(filp->f_dentry->d_inode)->i_ctx); 371 372 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 373 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 374 !list_entry(neighbor->aff_list.next, struct spu_context, 375 aff_list)->aff_head) { 376 err = ERR_PTR(-EEXIST); 377 goto out_put_neighbor; 378 } 379 380 if (gang != neighbor->gang) { 381 err = ERR_PTR(-EINVAL); 382 goto out_put_neighbor; 383 } 384 385 count = 1; 386 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 387 count++; 388 if (list_empty(&neighbor->aff_list)) 389 count++; 390 391 for (node = 0; node < MAX_NUMNODES; node++) { 392 if ((cbe_spu_info[node].n_spus - atomic_read( 393 &cbe_spu_info[node].reserved_spus)) >= count) 394 break; 395 } 396 397 if (node == MAX_NUMNODES) { 398 err = ERR_PTR(-EEXIST); 399 goto out_put_neighbor; 400 } 401 } 402 403 return neighbor; 404 405 out_put_neighbor: 406 put_spu_context(neighbor); 407 return err; 408 } 409 410 static void 411 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 412 struct spu_context *neighbor) 413 { 414 if (flags & SPU_CREATE_AFFINITY_MEM) 415 ctx->gang->aff_ref_ctx = ctx; 416 417 if (flags & SPU_CREATE_AFFINITY_SPU) { 418 if (list_empty(&neighbor->aff_list)) { 419 list_add_tail(&neighbor->aff_list, 420 &ctx->gang->aff_list_head); 421 neighbor->aff_head = 1; 422 } 423 424 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 425 || list_entry(neighbor->aff_list.next, struct spu_context, 426 aff_list)->aff_head) { 427 list_add(&ctx->aff_list, &neighbor->aff_list); 428 } else { 429 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 430 if (neighbor->aff_head) { 431 neighbor->aff_head = 0; 432 ctx->aff_head = 1; 433 } 434 } 435 436 if (!ctx->gang->aff_ref_ctx) 437 ctx->gang->aff_ref_ctx = ctx; 438 } 439 } 440 441 static int 442 spufs_create_context(struct inode *inode, struct dentry *dentry, 443 struct vfsmount *mnt, int flags, int mode, 444 struct file *aff_filp) 445 { 446 int ret; 447 int affinity; 448 struct spu_gang *gang; 449 struct spu_context *neighbor; 450 451 ret = -EPERM; 452 if ((flags & SPU_CREATE_NOSCHED) && 453 !capable(CAP_SYS_NICE)) 454 goto out_unlock; 455 456 ret = -EINVAL; 457 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 458 == SPU_CREATE_ISOLATE) 459 goto out_unlock; 460 461 ret = -ENODEV; 462 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 463 goto out_unlock; 464 465 gang = NULL; 466 neighbor = NULL; 467 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 468 if (affinity) { 469 gang = SPUFS_I(inode)->i_gang; 470 ret = -EINVAL; 471 if (!gang) 472 goto out_unlock; 473 mutex_lock(&gang->aff_mutex); 474 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 475 if (IS_ERR(neighbor)) { 476 ret = PTR_ERR(neighbor); 477 goto out_aff_unlock; 478 } 479 } 480 481 ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 482 if (ret) 483 goto out_aff_unlock; 484 485 if (affinity) { 486 spufs_set_affinity(flags, SPUFS_I(dentry->d_inode)->i_ctx, 487 neighbor); 488 if (neighbor) 489 put_spu_context(neighbor); 490 } 491 492 /* 493 * get references for dget and mntget, will be released 494 * in error path of *_open(). 495 */ 496 ret = spufs_context_open(dget(dentry), mntget(mnt)); 497 if (ret < 0) { 498 WARN_ON(spufs_rmdir(inode, dentry)); 499 if (affinity) 500 mutex_unlock(&gang->aff_mutex); 501 mutex_unlock(&inode->i_mutex); 502 spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); 503 goto out; 504 } 505 506 out_aff_unlock: 507 if (affinity) 508 mutex_unlock(&gang->aff_mutex); 509 out_unlock: 510 mutex_unlock(&inode->i_mutex); 511 out: 512 dput(dentry); 513 return ret; 514 } 515 516 static int 517 spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) 518 { 519 int ret; 520 struct inode *inode; 521 struct spu_gang *gang; 522 523 ret = -ENOSPC; 524 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 525 if (!inode) 526 goto out; 527 528 ret = 0; 529 if (dir->i_mode & S_ISGID) { 530 inode->i_gid = dir->i_gid; 531 inode->i_mode &= S_ISGID; 532 } 533 gang = alloc_spu_gang(); 534 SPUFS_I(inode)->i_ctx = NULL; 535 SPUFS_I(inode)->i_gang = gang; 536 if (!gang) 537 goto out_iput; 538 539 inode->i_op = &simple_dir_inode_operations; 540 inode->i_fop = &simple_dir_operations; 541 542 d_instantiate(dentry, inode); 543 inc_nlink(dir); 544 inc_nlink(dentry->d_inode); 545 return ret; 546 547 out_iput: 548 iput(inode); 549 out: 550 return ret; 551 } 552 553 static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt) 554 { 555 int ret; 556 struct file *filp; 557 558 ret = get_unused_fd(); 559 if (ret < 0) { 560 dput(dentry); 561 mntput(mnt); 562 goto out; 563 } 564 565 filp = dentry_open(dentry, mnt, O_RDONLY, current_cred()); 566 if (IS_ERR(filp)) { 567 put_unused_fd(ret); 568 ret = PTR_ERR(filp); 569 goto out; 570 } 571 572 filp->f_op = &simple_dir_operations; 573 fd_install(ret, filp); 574 out: 575 return ret; 576 } 577 578 static int spufs_create_gang(struct inode *inode, 579 struct dentry *dentry, 580 struct vfsmount *mnt, int mode) 581 { 582 int ret; 583 584 ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); 585 if (ret) 586 goto out; 587 588 /* 589 * get references for dget and mntget, will be released 590 * in error path of *_open(). 591 */ 592 ret = spufs_gang_open(dget(dentry), mntget(mnt)); 593 if (ret < 0) { 594 int err = simple_rmdir(inode, dentry); 595 WARN_ON(err); 596 } 597 598 out: 599 mutex_unlock(&inode->i_mutex); 600 dput(dentry); 601 return ret; 602 } 603 604 605 static struct file_system_type spufs_type; 606 607 long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode, 608 struct file *filp) 609 { 610 struct dentry *dentry; 611 int ret; 612 613 ret = -EINVAL; 614 /* check if we are on spufs */ 615 if (nd->path.dentry->d_sb->s_type != &spufs_type) 616 goto out; 617 618 /* don't accept undefined flags */ 619 if (flags & (~SPU_CREATE_FLAG_ALL)) 620 goto out; 621 622 /* only threads can be underneath a gang */ 623 if (nd->path.dentry != nd->path.dentry->d_sb->s_root) { 624 if ((flags & SPU_CREATE_GANG) || 625 !SPUFS_I(nd->path.dentry->d_inode)->i_gang) 626 goto out; 627 } 628 629 dentry = lookup_create(nd, 1); 630 ret = PTR_ERR(dentry); 631 if (IS_ERR(dentry)) 632 goto out_dir; 633 634 mode &= ~current_umask(); 635 636 if (flags & SPU_CREATE_GANG) 637 ret = spufs_create_gang(nd->path.dentry->d_inode, 638 dentry, nd->path.mnt, mode); 639 else 640 ret = spufs_create_context(nd->path.dentry->d_inode, 641 dentry, nd->path.mnt, flags, mode, 642 filp); 643 if (ret >= 0) 644 fsnotify_mkdir(nd->path.dentry->d_inode, dentry); 645 return ret; 646 647 out_dir: 648 mutex_unlock(&nd->path.dentry->d_inode->i_mutex); 649 out: 650 return ret; 651 } 652 653 /* File system initialization */ 654 enum { 655 Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, 656 }; 657 658 static const match_table_t spufs_tokens = { 659 { Opt_uid, "uid=%d" }, 660 { Opt_gid, "gid=%d" }, 661 { Opt_mode, "mode=%o" }, 662 { Opt_debug, "debug" }, 663 { Opt_err, NULL }, 664 }; 665 666 static int 667 spufs_parse_options(struct super_block *sb, char *options, struct inode *root) 668 { 669 char *p; 670 substring_t args[MAX_OPT_ARGS]; 671 672 while ((p = strsep(&options, ",")) != NULL) { 673 int token, option; 674 675 if (!*p) 676 continue; 677 678 token = match_token(p, spufs_tokens, args); 679 switch (token) { 680 case Opt_uid: 681 if (match_int(&args[0], &option)) 682 return 0; 683 root->i_uid = option; 684 break; 685 case Opt_gid: 686 if (match_int(&args[0], &option)) 687 return 0; 688 root->i_gid = option; 689 break; 690 case Opt_mode: 691 if (match_octal(&args[0], &option)) 692 return 0; 693 root->i_mode = option | S_IFDIR; 694 break; 695 case Opt_debug: 696 spufs_get_sb_info(sb)->debug = 1; 697 break; 698 default: 699 return 0; 700 } 701 } 702 return 1; 703 } 704 705 static void spufs_exit_isolated_loader(void) 706 { 707 free_pages((unsigned long) isolated_loader, 708 get_order(isolated_loader_size)); 709 } 710 711 static void 712 spufs_init_isolated_loader(void) 713 { 714 struct device_node *dn; 715 const char *loader; 716 int size; 717 718 dn = of_find_node_by_path("/spu-isolation"); 719 if (!dn) 720 return; 721 722 loader = of_get_property(dn, "loader", &size); 723 if (!loader) 724 return; 725 726 /* the loader must be align on a 16 byte boundary */ 727 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 728 if (!isolated_loader) 729 return; 730 731 isolated_loader_size = size; 732 memcpy(isolated_loader, loader, size); 733 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 734 } 735 736 static int 737 spufs_create_root(struct super_block *sb, void *data) 738 { 739 struct inode *inode; 740 int ret; 741 742 ret = -ENODEV; 743 if (!spu_management_ops) 744 goto out; 745 746 ret = -ENOMEM; 747 inode = spufs_new_inode(sb, S_IFDIR | 0775); 748 if (!inode) 749 goto out; 750 751 inode->i_op = &simple_dir_inode_operations; 752 inode->i_fop = &simple_dir_operations; 753 SPUFS_I(inode)->i_ctx = NULL; 754 inc_nlink(inode); 755 756 ret = -EINVAL; 757 if (!spufs_parse_options(sb, data, inode)) 758 goto out_iput; 759 760 ret = -ENOMEM; 761 sb->s_root = d_alloc_root(inode); 762 if (!sb->s_root) 763 goto out_iput; 764 765 return 0; 766 out_iput: 767 iput(inode); 768 out: 769 return ret; 770 } 771 772 static int 773 spufs_fill_super(struct super_block *sb, void *data, int silent) 774 { 775 struct spufs_sb_info *info; 776 static const struct super_operations s_ops = { 777 .alloc_inode = spufs_alloc_inode, 778 .destroy_inode = spufs_destroy_inode, 779 .statfs = simple_statfs, 780 .delete_inode = spufs_delete_inode, 781 .drop_inode = generic_delete_inode, 782 .show_options = generic_show_options, 783 }; 784 785 save_mount_options(sb, data); 786 787 info = kzalloc(sizeof(*info), GFP_KERNEL); 788 if (!info) 789 return -ENOMEM; 790 791 sb->s_maxbytes = MAX_LFS_FILESIZE; 792 sb->s_blocksize = PAGE_CACHE_SIZE; 793 sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 794 sb->s_magic = SPUFS_MAGIC; 795 sb->s_op = &s_ops; 796 sb->s_fs_info = info; 797 798 return spufs_create_root(sb, data); 799 } 800 801 static int 802 spufs_get_sb(struct file_system_type *fstype, int flags, 803 const char *name, void *data, struct vfsmount *mnt) 804 { 805 return get_sb_single(fstype, flags, data, spufs_fill_super, mnt); 806 } 807 808 static struct file_system_type spufs_type = { 809 .owner = THIS_MODULE, 810 .name = "spufs", 811 .get_sb = spufs_get_sb, 812 .kill_sb = kill_litter_super, 813 }; 814 815 static int __init spufs_init(void) 816 { 817 int ret; 818 819 ret = -ENODEV; 820 if (!spu_management_ops) 821 goto out; 822 823 ret = -ENOMEM; 824 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 825 sizeof(struct spufs_inode_info), 0, 826 SLAB_HWCACHE_ALIGN, spufs_init_once); 827 828 if (!spufs_inode_cache) 829 goto out; 830 ret = spu_sched_init(); 831 if (ret) 832 goto out_cache; 833 ret = register_filesystem(&spufs_type); 834 if (ret) 835 goto out_sched; 836 ret = register_spu_syscalls(&spufs_calls); 837 if (ret) 838 goto out_fs; 839 840 spufs_init_isolated_loader(); 841 842 return 0; 843 844 out_fs: 845 unregister_filesystem(&spufs_type); 846 out_sched: 847 spu_sched_exit(); 848 out_cache: 849 kmem_cache_destroy(spufs_inode_cache); 850 out: 851 return ret; 852 } 853 module_init(spufs_init); 854 855 static void __exit spufs_exit(void) 856 { 857 spu_sched_exit(); 858 spufs_exit_isolated_loader(); 859 unregister_spu_syscalls(&spufs_calls); 860 unregister_filesystem(&spufs_type); 861 kmem_cache_destroy(spufs_inode_cache); 862 } 863 module_exit(spufs_exit); 864 865 MODULE_LICENSE("GPL"); 866 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 867 868