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Commit | Line | Data |
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67207b96 AB |
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> | |
346f4d3c | 29 | #include <linux/mount.h> |
67207b96 AB |
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 | ||
0afacde3 | 36 | #include <asm/prom.h> |
67207b96 AB |
37 | #include <asm/semaphore.h> |
38 | #include <asm/spu.h> | |
39 | #include <asm/uaccess.h> | |
40 | ||
41 | #include "spufs.h" | |
42 | ||
43 | static kmem_cache_t *spufs_inode_cache; | |
c6730ed4 | 44 | char *isolated_loader; |
67207b96 | 45 | |
67207b96 AB |
46 | static struct inode * |
47 | spufs_alloc_inode(struct super_block *sb) | |
48 | { | |
49 | struct spufs_inode_info *ei; | |
50 | ||
e94b1766 | 51 | ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); |
67207b96 AB |
52 | if (!ei) |
53 | return NULL; | |
6263203e AB |
54 | |
55 | ei->i_gang = NULL; | |
56 | ei->i_ctx = NULL; | |
57 | ||
67207b96 AB |
58 | return &ei->vfs_inode; |
59 | } | |
60 | ||
61 | static void | |
62 | spufs_destroy_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, kmem_cache_t * cachep, unsigned long flags) | |
69 | { | |
70 | struct spufs_inode_info *ei = p; | |
71 | ||
72 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
73 | SLAB_CTOR_CONSTRUCTOR) { | |
74 | inode_init_once(&ei->vfs_inode); | |
75 | } | |
76 | } | |
77 | ||
78 | static struct inode * | |
79 | spufs_new_inode(struct super_block *sb, int mode) | |
80 | { | |
81 | struct inode *inode; | |
82 | ||
83 | inode = new_inode(sb); | |
84 | if (!inode) | |
85 | goto out; | |
86 | ||
87 | inode->i_mode = mode; | |
88 | inode->i_uid = current->fsuid; | |
89 | inode->i_gid = current->fsgid; | |
67207b96 AB |
90 | inode->i_blocks = 0; |
91 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
92 | out: | |
93 | return inode; | |
94 | } | |
95 | ||
96 | static int | |
97 | spufs_setattr(struct dentry *dentry, struct iattr *attr) | |
98 | { | |
99 | struct inode *inode = dentry->d_inode; | |
100 | ||
67207b96 AB |
101 | if ((attr->ia_valid & ATTR_SIZE) && |
102 | (attr->ia_size != inode->i_size)) | |
103 | return -EINVAL; | |
104 | return inode_setattr(inode, attr); | |
105 | } | |
106 | ||
107 | ||
108 | static int | |
109 | spufs_new_file(struct super_block *sb, struct dentry *dentry, | |
99ac48f5 | 110 | const struct file_operations *fops, int mode, |
67207b96 AB |
111 | struct spu_context *ctx) |
112 | { | |
113 | static struct inode_operations spufs_file_iops = { | |
67207b96 | 114 | .setattr = spufs_setattr, |
67207b96 AB |
115 | }; |
116 | struct inode *inode; | |
117 | int ret; | |
118 | ||
119 | ret = -ENOSPC; | |
120 | inode = spufs_new_inode(sb, S_IFREG | mode); | |
121 | if (!inode) | |
122 | goto out; | |
123 | ||
124 | ret = 0; | |
125 | inode->i_op = &spufs_file_iops; | |
126 | inode->i_fop = fops; | |
8e18e294 | 127 | inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); |
67207b96 AB |
128 | d_add(dentry, inode); |
129 | out: | |
130 | return ret; | |
131 | } | |
132 | ||
133 | static void | |
134 | spufs_delete_inode(struct inode *inode) | |
135 | { | |
6263203e AB |
136 | struct spufs_inode_info *ei = SPUFS_I(inode); |
137 | ||
138 | if (ei->i_ctx) | |
139 | put_spu_context(ei->i_ctx); | |
140 | if (ei->i_gang) | |
141 | put_spu_gang(ei->i_gang); | |
67207b96 AB |
142 | clear_inode(inode); |
143 | } | |
144 | ||
3f51dd91 | 145 | static void spufs_prune_dir(struct dentry *dir) |
67207b96 | 146 | { |
8b3d6663 | 147 | struct dentry *dentry, *tmp; |
6263203e | 148 | |
1b1dcc1b | 149 | mutex_lock(&dir->d_inode->i_mutex); |
c3a9aea7 | 150 | list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { |
8b3d6663 | 151 | spin_lock(&dcache_lock); |
67207b96 | 152 | spin_lock(&dentry->d_lock); |
8b3d6663 AB |
153 | if (!(d_unhashed(dentry)) && dentry->d_inode) { |
154 | dget_locked(dentry); | |
155 | __d_drop(dentry); | |
156 | spin_unlock(&dentry->d_lock); | |
3f51dd91 | 157 | simple_unlink(dir->d_inode, dentry); |
8b3d6663 AB |
158 | spin_unlock(&dcache_lock); |
159 | dput(dentry); | |
160 | } else { | |
161 | spin_unlock(&dentry->d_lock); | |
162 | spin_unlock(&dcache_lock); | |
163 | } | |
67207b96 | 164 | } |
3f51dd91 | 165 | shrink_dcache_parent(dir); |
1b1dcc1b | 166 | mutex_unlock(&dir->d_inode->i_mutex); |
3f51dd91 AB |
167 | } |
168 | ||
6263203e AB |
169 | /* Caller must hold parent->i_mutex */ |
170 | static int spufs_rmdir(struct inode *parent, struct dentry *dir) | |
3f51dd91 | 171 | { |
3f51dd91 | 172 | /* remove all entries */ |
6263203e | 173 | spufs_prune_dir(dir); |
8b3d6663 | 174 | |
6263203e | 175 | return simple_rmdir(parent, dir); |
67207b96 AB |
176 | } |
177 | ||
3f51dd91 AB |
178 | static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files, |
179 | int mode, struct spu_context *ctx) | |
180 | { | |
181 | struct dentry *dentry; | |
182 | int ret; | |
183 | ||
184 | while (files->name && files->name[0]) { | |
185 | ret = -ENOMEM; | |
186 | dentry = d_alloc_name(dir, files->name); | |
187 | if (!dentry) | |
188 | goto out; | |
189 | ret = spufs_new_file(dir->d_sb, dentry, files->ops, | |
190 | files->mode & mode, ctx); | |
191 | if (ret) | |
192 | goto out; | |
193 | files++; | |
194 | } | |
195 | return 0; | |
196 | out: | |
197 | spufs_prune_dir(dir); | |
198 | return ret; | |
199 | } | |
200 | ||
67207b96 AB |
201 | static int spufs_dir_close(struct inode *inode, struct file *file) |
202 | { | |
0309f02d | 203 | struct spu_context *ctx; |
6263203e AB |
204 | struct inode *parent; |
205 | struct dentry *dir; | |
67207b96 AB |
206 | int ret; |
207 | ||
6263203e AB |
208 | dir = file->f_dentry; |
209 | parent = dir->d_parent->d_inode; | |
210 | ctx = SPUFS_I(dir->d_inode)->i_ctx; | |
c8ca0633 | 211 | |
6263203e AB |
212 | mutex_lock(&parent->i_mutex); |
213 | ret = spufs_rmdir(parent, dir); | |
214 | mutex_unlock(&parent->i_mutex); | |
67207b96 | 215 | WARN_ON(ret); |
c8ca0633 | 216 | |
0309f02d ME |
217 | /* We have to give up the mm_struct */ |
218 | spu_forget(ctx); | |
219 | ||
67207b96 AB |
220 | return dcache_dir_close(inode, file); |
221 | } | |
222 | ||
223 | struct inode_operations spufs_dir_inode_operations = { | |
224 | .lookup = simple_lookup, | |
225 | }; | |
226 | ||
e80358ad | 227 | struct file_operations spufs_context_fops = { |
67207b96 AB |
228 | .open = dcache_dir_open, |
229 | .release = spufs_dir_close, | |
230 | .llseek = dcache_dir_lseek, | |
231 | .read = generic_read_dir, | |
232 | .readdir = dcache_readdir, | |
233 | .fsync = simple_sync_file, | |
234 | }; | |
bf1ab978 | 235 | EXPORT_SYMBOL_GPL(spufs_context_fops); |
67207b96 AB |
236 | |
237 | static int | |
9add11da AB |
238 | spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, |
239 | int mode) | |
67207b96 AB |
240 | { |
241 | int ret; | |
242 | struct inode *inode; | |
243 | struct spu_context *ctx; | |
244 | ||
245 | ret = -ENOSPC; | |
246 | inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); | |
247 | if (!inode) | |
248 | goto out; | |
249 | ||
250 | if (dir->i_mode & S_ISGID) { | |
251 | inode->i_gid = dir->i_gid; | |
252 | inode->i_mode &= S_ISGID; | |
253 | } | |
6263203e | 254 | ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ |
67207b96 AB |
255 | SPUFS_I(inode)->i_ctx = ctx; |
256 | if (!ctx) | |
257 | goto out_iput; | |
258 | ||
9add11da | 259 | ctx->flags = flags; |
67207b96 AB |
260 | inode->i_op = &spufs_dir_inode_operations; |
261 | inode->i_fop = &simple_dir_operations; | |
5737edd1 MN |
262 | if (flags & SPU_CREATE_NOSCHED) |
263 | ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, | |
264 | mode, ctx); | |
265 | else | |
266 | ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); | |
267 | ||
67207b96 AB |
268 | if (ret) |
269 | goto out_free_ctx; | |
270 | ||
271 | d_instantiate(dentry, inode); | |
272 | dget(dentry); | |
273 | dir->i_nlink++; | |
346f4d3c | 274 | dentry->d_inode->i_nlink++; |
67207b96 AB |
275 | goto out; |
276 | ||
277 | out_free_ctx: | |
278 | put_spu_context(ctx); | |
279 | out_iput: | |
280 | iput(inode); | |
281 | out: | |
282 | return ret; | |
283 | } | |
284 | ||
346f4d3c AB |
285 | static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) |
286 | { | |
287 | int ret; | |
288 | struct file *filp; | |
289 | ||
290 | ret = get_unused_fd(); | |
291 | if (ret < 0) { | |
292 | dput(dentry); | |
293 | mntput(mnt); | |
294 | goto out; | |
295 | } | |
296 | ||
297 | filp = dentry_open(dentry, mnt, O_RDONLY); | |
298 | if (IS_ERR(filp)) { | |
299 | put_unused_fd(ret); | |
300 | ret = PTR_ERR(filp); | |
301 | goto out; | |
302 | } | |
303 | ||
304 | filp->f_op = &spufs_context_fops; | |
305 | fd_install(ret, filp); | |
306 | out: | |
307 | return ret; | |
308 | } | |
309 | ||
6263203e AB |
310 | static int spufs_create_context(struct inode *inode, |
311 | struct dentry *dentry, | |
312 | struct vfsmount *mnt, int flags, int mode) | |
313 | { | |
314 | int ret; | |
315 | ||
5737edd1 MN |
316 | ret = -EPERM; |
317 | if ((flags & SPU_CREATE_NOSCHED) && | |
318 | !capable(CAP_SYS_NICE)) | |
319 | goto out_unlock; | |
320 | ||
321 | ret = -EINVAL; | |
322 | if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) | |
323 | == SPU_CREATE_ISOLATE) | |
324 | goto out_unlock; | |
325 | ||
bd2e5f82 JK |
326 | ret = -ENODEV; |
327 | if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) | |
328 | goto out_unlock; | |
329 | ||
6263203e AB |
330 | ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); |
331 | if (ret) | |
332 | goto out_unlock; | |
333 | ||
334 | /* | |
335 | * get references for dget and mntget, will be released | |
336 | * in error path of *_open(). | |
337 | */ | |
338 | ret = spufs_context_open(dget(dentry), mntget(mnt)); | |
339 | if (ret < 0) { | |
340 | WARN_ON(spufs_rmdir(inode, dentry)); | |
341 | mutex_unlock(&inode->i_mutex); | |
342 | spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); | |
343 | goto out; | |
344 | } | |
345 | ||
346 | out_unlock: | |
347 | mutex_unlock(&inode->i_mutex); | |
348 | out: | |
349 | dput(dentry); | |
350 | return ret; | |
351 | } | |
352 | ||
353 | static int spufs_rmgang(struct inode *root, struct dentry *dir) | |
354 | { | |
355 | /* FIXME: this fails if the dir is not empty, | |
356 | which causes a leak of gangs. */ | |
357 | return simple_rmdir(root, dir); | |
358 | } | |
359 | ||
360 | static int spufs_gang_close(struct inode *inode, struct file *file) | |
361 | { | |
362 | struct inode *parent; | |
363 | struct dentry *dir; | |
364 | int ret; | |
365 | ||
366 | dir = file->f_dentry; | |
367 | parent = dir->d_parent->d_inode; | |
368 | ||
369 | ret = spufs_rmgang(parent, dir); | |
370 | WARN_ON(ret); | |
371 | ||
372 | return dcache_dir_close(inode, file); | |
373 | } | |
374 | ||
375 | struct file_operations spufs_gang_fops = { | |
376 | .open = dcache_dir_open, | |
377 | .release = spufs_gang_close, | |
378 | .llseek = dcache_dir_lseek, | |
379 | .read = generic_read_dir, | |
380 | .readdir = dcache_readdir, | |
381 | .fsync = simple_sync_file, | |
382 | }; | |
383 | ||
384 | static int | |
385 | spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) | |
386 | { | |
387 | int ret; | |
388 | struct inode *inode; | |
389 | struct spu_gang *gang; | |
390 | ||
391 | ret = -ENOSPC; | |
392 | inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); | |
393 | if (!inode) | |
394 | goto out; | |
395 | ||
396 | ret = 0; | |
397 | if (dir->i_mode & S_ISGID) { | |
398 | inode->i_gid = dir->i_gid; | |
399 | inode->i_mode &= S_ISGID; | |
400 | } | |
401 | gang = alloc_spu_gang(); | |
402 | SPUFS_I(inode)->i_ctx = NULL; | |
403 | SPUFS_I(inode)->i_gang = gang; | |
404 | if (!gang) | |
405 | goto out_iput; | |
406 | ||
407 | inode->i_op = &spufs_dir_inode_operations; | |
408 | inode->i_fop = &simple_dir_operations; | |
409 | ||
410 | d_instantiate(dentry, inode); | |
411 | dget(dentry); | |
412 | dir->i_nlink++; | |
413 | dentry->d_inode->i_nlink++; | |
414 | return ret; | |
415 | ||
416 | out_iput: | |
417 | iput(inode); | |
418 | out: | |
419 | return ret; | |
420 | } | |
421 | ||
422 | static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt) | |
423 | { | |
424 | int ret; | |
425 | struct file *filp; | |
426 | ||
427 | ret = get_unused_fd(); | |
428 | if (ret < 0) { | |
429 | dput(dentry); | |
430 | mntput(mnt); | |
431 | goto out; | |
432 | } | |
433 | ||
434 | filp = dentry_open(dentry, mnt, O_RDONLY); | |
435 | if (IS_ERR(filp)) { | |
436 | put_unused_fd(ret); | |
437 | ret = PTR_ERR(filp); | |
438 | goto out; | |
439 | } | |
440 | ||
441 | filp->f_op = &spufs_gang_fops; | |
442 | fd_install(ret, filp); | |
443 | out: | |
444 | return ret; | |
445 | } | |
446 | ||
447 | static int spufs_create_gang(struct inode *inode, | |
448 | struct dentry *dentry, | |
449 | struct vfsmount *mnt, int mode) | |
450 | { | |
451 | int ret; | |
452 | ||
453 | ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); | |
454 | if (ret) | |
455 | goto out; | |
456 | ||
457 | /* | |
458 | * get references for dget and mntget, will be released | |
459 | * in error path of *_open(). | |
460 | */ | |
461 | ret = spufs_gang_open(dget(dentry), mntget(mnt)); | |
462 | if (ret < 0) | |
463 | WARN_ON(spufs_rmgang(inode, dentry)); | |
464 | ||
465 | out: | |
466 | mutex_unlock(&inode->i_mutex); | |
467 | dput(dentry); | |
468 | return ret; | |
469 | } | |
470 | ||
471 | ||
346f4d3c AB |
472 | static struct file_system_type spufs_type; |
473 | ||
6263203e | 474 | long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode) |
67207b96 AB |
475 | { |
476 | struct dentry *dentry; | |
67207b96 AB |
477 | int ret; |
478 | ||
67207b96 | 479 | ret = -EINVAL; |
6263203e AB |
480 | /* check if we are on spufs */ |
481 | if (nd->dentry->d_sb->s_type != &spufs_type) | |
67207b96 AB |
482 | goto out; |
483 | ||
6263203e | 484 | /* don't accept undefined flags */ |
9add11da | 485 | if (flags & (~SPU_CREATE_FLAG_ALL)) |
c9832948 AB |
486 | goto out; |
487 | ||
6263203e AB |
488 | /* only threads can be underneath a gang */ |
489 | if (nd->dentry != nd->dentry->d_sb->s_root) { | |
490 | if ((flags & SPU_CREATE_GANG) || | |
491 | !SPUFS_I(nd->dentry->d_inode)->i_gang) | |
492 | goto out; | |
493 | } | |
494 | ||
67207b96 AB |
495 | dentry = lookup_create(nd, 1); |
496 | ret = PTR_ERR(dentry); | |
497 | if (IS_ERR(dentry)) | |
498 | goto out_dir; | |
499 | ||
500 | ret = -EEXIST; | |
501 | if (dentry->d_inode) | |
502 | goto out_dput; | |
503 | ||
504 | mode &= ~current->fs->umask; | |
67207b96 | 505 | |
6263203e AB |
506 | if (flags & SPU_CREATE_GANG) |
507 | return spufs_create_gang(nd->dentry->d_inode, | |
508 | dentry, nd->mnt, mode); | |
509 | else | |
510 | return spufs_create_context(nd->dentry->d_inode, | |
511 | dentry, nd->mnt, flags, mode); | |
67207b96 AB |
512 | |
513 | out_dput: | |
514 | dput(dentry); | |
515 | out_dir: | |
1b1dcc1b | 516 | mutex_unlock(&nd->dentry->d_inode->i_mutex); |
67207b96 AB |
517 | out: |
518 | return ret; | |
519 | } | |
520 | ||
521 | /* File system initialization */ | |
522 | enum { | |
523 | Opt_uid, Opt_gid, Opt_err, | |
524 | }; | |
525 | ||
526 | static match_table_t spufs_tokens = { | |
527 | { Opt_uid, "uid=%d" }, | |
528 | { Opt_gid, "gid=%d" }, | |
529 | { Opt_err, NULL }, | |
530 | }; | |
531 | ||
532 | static int | |
533 | spufs_parse_options(char *options, struct inode *root) | |
534 | { | |
535 | char *p; | |
536 | substring_t args[MAX_OPT_ARGS]; | |
537 | ||
538 | while ((p = strsep(&options, ",")) != NULL) { | |
539 | int token, option; | |
540 | ||
541 | if (!*p) | |
542 | continue; | |
543 | ||
544 | token = match_token(p, spufs_tokens, args); | |
545 | switch (token) { | |
546 | case Opt_uid: | |
547 | if (match_int(&args[0], &option)) | |
548 | return 0; | |
549 | root->i_uid = option; | |
550 | break; | |
551 | case Opt_gid: | |
552 | if (match_int(&args[0], &option)) | |
553 | return 0; | |
554 | root->i_gid = option; | |
555 | break; | |
556 | default: | |
557 | return 0; | |
558 | } | |
559 | } | |
560 | return 1; | |
561 | } | |
562 | ||
0afacde3 AB |
563 | static void |
564 | spufs_init_isolated_loader(void) | |
565 | { | |
566 | struct device_node *dn; | |
567 | const char *loader; | |
568 | int size; | |
569 | ||
570 | dn = of_find_node_by_path("/spu-isolation"); | |
571 | if (!dn) | |
572 | return; | |
573 | ||
574 | loader = get_property(dn, "loader", &size); | |
575 | if (!loader) | |
576 | return; | |
577 | ||
578 | /* kmalloc should align on a 16 byte boundary..* */ | |
579 | isolated_loader = kmalloc(size, GFP_KERNEL); | |
580 | if (!isolated_loader) | |
581 | return; | |
582 | ||
583 | memcpy(isolated_loader, loader, size); | |
584 | printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); | |
585 | } | |
586 | ||
67207b96 | 587 | static int |
8b3d6663 AB |
588 | spufs_create_root(struct super_block *sb, void *data) |
589 | { | |
67207b96 AB |
590 | struct inode *inode; |
591 | int ret; | |
592 | ||
593 | ret = -ENOMEM; | |
594 | inode = spufs_new_inode(sb, S_IFDIR | 0775); | |
595 | if (!inode) | |
596 | goto out; | |
597 | ||
598 | inode->i_op = &spufs_dir_inode_operations; | |
599 | inode->i_fop = &simple_dir_operations; | |
600 | SPUFS_I(inode)->i_ctx = NULL; | |
601 | ||
602 | ret = -EINVAL; | |
603 | if (!spufs_parse_options(data, inode)) | |
604 | goto out_iput; | |
605 | ||
606 | ret = -ENOMEM; | |
607 | sb->s_root = d_alloc_root(inode); | |
608 | if (!sb->s_root) | |
609 | goto out_iput; | |
610 | ||
611 | return 0; | |
612 | out_iput: | |
613 | iput(inode); | |
614 | out: | |
615 | return ret; | |
616 | } | |
617 | ||
618 | static int | |
619 | spufs_fill_super(struct super_block *sb, void *data, int silent) | |
620 | { | |
621 | static struct super_operations s_ops = { | |
622 | .alloc_inode = spufs_alloc_inode, | |
623 | .destroy_inode = spufs_destroy_inode, | |
624 | .statfs = simple_statfs, | |
625 | .delete_inode = spufs_delete_inode, | |
626 | .drop_inode = generic_delete_inode, | |
627 | }; | |
628 | ||
629 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
630 | sb->s_blocksize = PAGE_CACHE_SIZE; | |
631 | sb->s_blocksize_bits = PAGE_CACHE_SHIFT; | |
632 | sb->s_magic = SPUFS_MAGIC; | |
633 | sb->s_op = &s_ops; | |
634 | ||
635 | return spufs_create_root(sb, data); | |
636 | } | |
637 | ||
454e2398 | 638 | static int |
67207b96 | 639 | spufs_get_sb(struct file_system_type *fstype, int flags, |
454e2398 | 640 | const char *name, void *data, struct vfsmount *mnt) |
67207b96 | 641 | { |
454e2398 | 642 | return get_sb_single(fstype, flags, data, spufs_fill_super, mnt); |
67207b96 AB |
643 | } |
644 | ||
645 | static struct file_system_type spufs_type = { | |
646 | .owner = THIS_MODULE, | |
647 | .name = "spufs", | |
648 | .get_sb = spufs_get_sb, | |
649 | .kill_sb = kill_litter_super, | |
650 | }; | |
651 | ||
e78b47a5 | 652 | static int __init spufs_init(void) |
67207b96 AB |
653 | { |
654 | int ret; | |
bf1ab978 | 655 | |
67207b96 AB |
656 | ret = -ENOMEM; |
657 | spufs_inode_cache = kmem_cache_create("spufs_inode_cache", | |
658 | sizeof(struct spufs_inode_info), 0, | |
659 | SLAB_HWCACHE_ALIGN, spufs_init_once, NULL); | |
660 | ||
661 | if (!spufs_inode_cache) | |
662 | goto out; | |
8b3d6663 AB |
663 | if (spu_sched_init() != 0) { |
664 | kmem_cache_destroy(spufs_inode_cache); | |
665 | goto out; | |
666 | } | |
67207b96 AB |
667 | ret = register_filesystem(&spufs_type); |
668 | if (ret) | |
669 | goto out_cache; | |
670 | ret = register_spu_syscalls(&spufs_calls); | |
bf1ab978 DGM |
671 | if (ret) |
672 | goto out_fs; | |
673 | ret = register_arch_coredump_calls(&spufs_coredump_calls); | |
67207b96 AB |
674 | if (ret) |
675 | goto out_fs; | |
0afacde3 AB |
676 | |
677 | spufs_init_isolated_loader(); | |
bf1ab978 | 678 | |
67207b96 AB |
679 | return 0; |
680 | out_fs: | |
681 | unregister_filesystem(&spufs_type); | |
682 | out_cache: | |
683 | kmem_cache_destroy(spufs_inode_cache); | |
684 | out: | |
685 | return ret; | |
686 | } | |
687 | module_init(spufs_init); | |
688 | ||
e78b47a5 | 689 | static void __exit spufs_exit(void) |
67207b96 | 690 | { |
8b3d6663 | 691 | spu_sched_exit(); |
bf1ab978 | 692 | unregister_arch_coredump_calls(&spufs_coredump_calls); |
67207b96 AB |
693 | unregister_spu_syscalls(&spufs_calls); |
694 | unregister_filesystem(&spufs_type); | |
695 | kmem_cache_destroy(spufs_inode_cache); | |
696 | } | |
697 | module_exit(spufs_exit); | |
698 | ||
699 | MODULE_LICENSE("GPL"); | |
700 | MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); | |
701 |