arch/powerpc/platforms/cell/spufs/inode.c

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