Commit | Line | Data |
---|---|---|
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> | |
ccf17e9d | 39 | #include <asm/spu_priv1.h> |
67207b96 AB |
40 | #include <asm/uaccess.h> |
41 | ||
42 | #include "spufs.h" | |
43 | ||
e18b890b | 44 | static struct kmem_cache *spufs_inode_cache; |
c6730ed4 | 45 | char *isolated_loader; |
67207b96 | 46 | |
67207b96 AB |
47 | static struct inode * |
48 | spufs_alloc_inode(struct super_block *sb) | |
49 | { | |
50 | struct spufs_inode_info *ei; | |
51 | ||
e94b1766 | 52 | ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); |
67207b96 AB |
53 | if (!ei) |
54 | return NULL; | |
6263203e AB |
55 | |
56 | ei->i_gang = NULL; | |
57 | ei->i_ctx = NULL; | |
43c2bbd9 | 58 | ei->i_openers = 0; |
6263203e | 59 | |
67207b96 AB |
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 | |
e18b890b | 70 | spufs_init_once(void *p, struct kmem_cache * cachep, unsigned long flags) |
67207b96 AB |
71 | { |
72 | struct spufs_inode_info *ei = p; | |
73 | ||
a35afb83 | 74 | inode_init_once(&ei->vfs_inode); |
67207b96 AB |
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; | |
67207b96 AB |
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 | ||
67207b96 AB |
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, | |
99ac48f5 | 109 | const struct file_operations *fops, int mode, |
67207b96 AB |
110 | struct spu_context *ctx) |
111 | { | |
112 | static struct inode_operations spufs_file_iops = { | |
67207b96 | 113 | .setattr = spufs_setattr, |
67207b96 AB |
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; | |
8e18e294 | 126 | inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); |
67207b96 AB |
127 | d_add(dentry, inode); |
128 | out: | |
129 | return ret; | |
130 | } | |
131 | ||
132 | static void | |
133 | spufs_delete_inode(struct inode *inode) | |
134 | { | |
6263203e AB |
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); | |
67207b96 AB |
141 | clear_inode(inode); |
142 | } | |
143 | ||
3f51dd91 | 144 | static void spufs_prune_dir(struct dentry *dir) |
67207b96 | 145 | { |
8b3d6663 | 146 | struct dentry *dentry, *tmp; |
6263203e | 147 | |
1b1dcc1b | 148 | mutex_lock(&dir->d_inode->i_mutex); |
c3a9aea7 | 149 | list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { |
8b3d6663 | 150 | spin_lock(&dcache_lock); |
67207b96 | 151 | spin_lock(&dentry->d_lock); |
8b3d6663 AB |
152 | if (!(d_unhashed(dentry)) && dentry->d_inode) { |
153 | dget_locked(dentry); | |
154 | __d_drop(dentry); | |
155 | spin_unlock(&dentry->d_lock); | |
3f51dd91 | 156 | simple_unlink(dir->d_inode, dentry); |
8b3d6663 AB |
157 | spin_unlock(&dcache_lock); |
158 | dput(dentry); | |
159 | } else { | |
160 | spin_unlock(&dentry->d_lock); | |
161 | spin_unlock(&dcache_lock); | |
162 | } | |
67207b96 | 163 | } |
3f51dd91 | 164 | shrink_dcache_parent(dir); |
1b1dcc1b | 165 | mutex_unlock(&dir->d_inode->i_mutex); |
3f51dd91 AB |
166 | } |
167 | ||
6263203e AB |
168 | /* Caller must hold parent->i_mutex */ |
169 | static int spufs_rmdir(struct inode *parent, struct dentry *dir) | |
3f51dd91 | 170 | { |
3f51dd91 | 171 | /* remove all entries */ |
6263203e | 172 | spufs_prune_dir(dir); |
8b3d6663 | 173 | |
6263203e | 174 | return simple_rmdir(parent, dir); |
67207b96 AB |
175 | } |
176 | ||
3f51dd91 AB |
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; | |
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 | spufs_prune_dir(dir); | |
197 | return ret; | |
198 | } | |
199 | ||
67207b96 AB |
200 | static int spufs_dir_close(struct inode *inode, struct file *file) |
201 | { | |
0309f02d | 202 | struct spu_context *ctx; |
6263203e AB |
203 | struct inode *parent; |
204 | struct dentry *dir; | |
67207b96 AB |
205 | int ret; |
206 | ||
b4d1ab58 | 207 | dir = file->f_path.dentry; |
6263203e AB |
208 | parent = dir->d_parent->d_inode; |
209 | ctx = SPUFS_I(dir->d_inode)->i_ctx; | |
c8ca0633 | 210 | |
6263203e AB |
211 | mutex_lock(&parent->i_mutex); |
212 | ret = spufs_rmdir(parent, dir); | |
213 | mutex_unlock(&parent->i_mutex); | |
67207b96 | 214 | WARN_ON(ret); |
c8ca0633 | 215 | |
0309f02d ME |
216 | /* We have to give up the mm_struct */ |
217 | spu_forget(ctx); | |
218 | ||
67207b96 AB |
219 | return dcache_dir_close(inode, file); |
220 | } | |
221 | ||
754661f1 | 222 | const struct inode_operations spufs_dir_inode_operations = { |
67207b96 AB |
223 | .lookup = simple_lookup, |
224 | }; | |
225 | ||
5dfe4c96 | 226 | const struct file_operations spufs_context_fops = { |
67207b96 AB |
227 | .open = dcache_dir_open, |
228 | .release = spufs_dir_close, | |
229 | .llseek = dcache_dir_lseek, | |
230 | .read = generic_read_dir, | |
231 | .readdir = dcache_readdir, | |
232 | .fsync = simple_sync_file, | |
233 | }; | |
bf1ab978 | 234 | EXPORT_SYMBOL_GPL(spufs_context_fops); |
67207b96 AB |
235 | |
236 | static int | |
9add11da AB |
237 | spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, |
238 | int mode) | |
67207b96 AB |
239 | { |
240 | int ret; | |
241 | struct inode *inode; | |
242 | struct spu_context *ctx; | |
243 | ||
244 | ret = -ENOSPC; | |
245 | inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); | |
246 | if (!inode) | |
247 | goto out; | |
248 | ||
249 | if (dir->i_mode & S_ISGID) { | |
250 | inode->i_gid = dir->i_gid; | |
251 | inode->i_mode &= S_ISGID; | |
252 | } | |
6263203e | 253 | ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ |
67207b96 AB |
254 | SPUFS_I(inode)->i_ctx = ctx; |
255 | if (!ctx) | |
256 | goto out_iput; | |
257 | ||
9add11da | 258 | ctx->flags = flags; |
67207b96 AB |
259 | inode->i_op = &spufs_dir_inode_operations; |
260 | inode->i_fop = &simple_dir_operations; | |
5737edd1 MN |
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 | ||
67207b96 AB |
267 | if (ret) |
268 | goto out_free_ctx; | |
269 | ||
270 | d_instantiate(dentry, inode); | |
271 | dget(dentry); | |
272 | dir->i_nlink++; | |
346f4d3c | 273 | dentry->d_inode->i_nlink++; |
67207b96 AB |
274 | goto out; |
275 | ||
276 | out_free_ctx: | |
277 | put_spu_context(ctx); | |
278 | out_iput: | |
279 | iput(inode); | |
280 | out: | |
281 | return ret; | |
282 | } | |
283 | ||
346f4d3c AB |
284 | static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) |
285 | { | |
286 | int ret; | |
287 | struct file *filp; | |
288 | ||
289 | ret = get_unused_fd(); | |
290 | if (ret < 0) { | |
291 | dput(dentry); | |
292 | mntput(mnt); | |
293 | goto out; | |
294 | } | |
295 | ||
296 | filp = dentry_open(dentry, mnt, O_RDONLY); | |
297 | if (IS_ERR(filp)) { | |
298 | put_unused_fd(ret); | |
299 | ret = PTR_ERR(filp); | |
300 | goto out; | |
301 | } | |
302 | ||
303 | filp->f_op = &spufs_context_fops; | |
304 | fd_install(ret, filp); | |
305 | out: | |
306 | return ret; | |
307 | } | |
308 | ||
6263203e AB |
309 | static int spufs_create_context(struct inode *inode, |
310 | struct dentry *dentry, | |
311 | struct vfsmount *mnt, int flags, int mode) | |
312 | { | |
313 | int ret; | |
314 | ||
5737edd1 MN |
315 | ret = -EPERM; |
316 | if ((flags & SPU_CREATE_NOSCHED) && | |
317 | !capable(CAP_SYS_NICE)) | |
318 | goto out_unlock; | |
319 | ||
320 | ret = -EINVAL; | |
321 | if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) | |
322 | == SPU_CREATE_ISOLATE) | |
323 | goto out_unlock; | |
324 | ||
bd2e5f82 JK |
325 | ret = -ENODEV; |
326 | if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) | |
327 | goto out_unlock; | |
328 | ||
6263203e AB |
329 | ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); |
330 | if (ret) | |
331 | goto out_unlock; | |
332 | ||
333 | /* | |
334 | * get references for dget and mntget, will be released | |
335 | * in error path of *_open(). | |
336 | */ | |
337 | ret = spufs_context_open(dget(dentry), mntget(mnt)); | |
338 | if (ret < 0) { | |
339 | WARN_ON(spufs_rmdir(inode, dentry)); | |
340 | mutex_unlock(&inode->i_mutex); | |
341 | spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); | |
342 | goto out; | |
343 | } | |
344 | ||
345 | out_unlock: | |
346 | mutex_unlock(&inode->i_mutex); | |
347 | out: | |
348 | dput(dentry); | |
349 | return ret; | |
350 | } | |
351 | ||
352 | static int spufs_rmgang(struct inode *root, struct dentry *dir) | |
353 | { | |
354 | /* FIXME: this fails if the dir is not empty, | |
355 | which causes a leak of gangs. */ | |
356 | return simple_rmdir(root, dir); | |
357 | } | |
358 | ||
359 | static int spufs_gang_close(struct inode *inode, struct file *file) | |
360 | { | |
361 | struct inode *parent; | |
362 | struct dentry *dir; | |
363 | int ret; | |
364 | ||
b4d1ab58 | 365 | dir = file->f_path.dentry; |
6263203e AB |
366 | parent = dir->d_parent->d_inode; |
367 | ||
368 | ret = spufs_rmgang(parent, dir); | |
369 | WARN_ON(ret); | |
370 | ||
371 | return dcache_dir_close(inode, file); | |
372 | } | |
373 | ||
5dfe4c96 | 374 | const struct file_operations spufs_gang_fops = { |
6263203e AB |
375 | .open = dcache_dir_open, |
376 | .release = spufs_gang_close, | |
377 | .llseek = dcache_dir_lseek, | |
378 | .read = generic_read_dir, | |
379 | .readdir = dcache_readdir, | |
380 | .fsync = simple_sync_file, | |
381 | }; | |
382 | ||
383 | static int | |
384 | spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) | |
385 | { | |
386 | int ret; | |
387 | struct inode *inode; | |
388 | struct spu_gang *gang; | |
389 | ||
390 | ret = -ENOSPC; | |
391 | inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); | |
392 | if (!inode) | |
393 | goto out; | |
394 | ||
395 | ret = 0; | |
396 | if (dir->i_mode & S_ISGID) { | |
397 | inode->i_gid = dir->i_gid; | |
398 | inode->i_mode &= S_ISGID; | |
399 | } | |
400 | gang = alloc_spu_gang(); | |
401 | SPUFS_I(inode)->i_ctx = NULL; | |
402 | SPUFS_I(inode)->i_gang = gang; | |
403 | if (!gang) | |
404 | goto out_iput; | |
405 | ||
406 | inode->i_op = &spufs_dir_inode_operations; | |
407 | inode->i_fop = &simple_dir_operations; | |
408 | ||
409 | d_instantiate(dentry, inode); | |
410 | dget(dentry); | |
411 | dir->i_nlink++; | |
412 | dentry->d_inode->i_nlink++; | |
413 | return ret; | |
414 | ||
415 | out_iput: | |
416 | iput(inode); | |
417 | out: | |
418 | return ret; | |
419 | } | |
420 | ||
421 | static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt) | |
422 | { | |
423 | int ret; | |
424 | struct file *filp; | |
425 | ||
426 | ret = get_unused_fd(); | |
427 | if (ret < 0) { | |
428 | dput(dentry); | |
429 | mntput(mnt); | |
430 | goto out; | |
431 | } | |
432 | ||
433 | filp = dentry_open(dentry, mnt, O_RDONLY); | |
434 | if (IS_ERR(filp)) { | |
435 | put_unused_fd(ret); | |
436 | ret = PTR_ERR(filp); | |
437 | goto out; | |
438 | } | |
439 | ||
440 | filp->f_op = &spufs_gang_fops; | |
441 | fd_install(ret, filp); | |
442 | out: | |
443 | return ret; | |
444 | } | |
445 | ||
446 | static int spufs_create_gang(struct inode *inode, | |
447 | struct dentry *dentry, | |
448 | struct vfsmount *mnt, int mode) | |
449 | { | |
450 | int ret; | |
451 | ||
452 | ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); | |
453 | if (ret) | |
454 | goto out; | |
455 | ||
456 | /* | |
457 | * get references for dget and mntget, will be released | |
458 | * in error path of *_open(). | |
459 | */ | |
460 | ret = spufs_gang_open(dget(dentry), mntget(mnt)); | |
461 | if (ret < 0) | |
462 | WARN_ON(spufs_rmgang(inode, dentry)); | |
463 | ||
464 | out: | |
465 | mutex_unlock(&inode->i_mutex); | |
466 | dput(dentry); | |
467 | return ret; | |
468 | } | |
469 | ||
470 | ||
346f4d3c AB |
471 | static struct file_system_type spufs_type; |
472 | ||
6263203e | 473 | long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode) |
67207b96 AB |
474 | { |
475 | struct dentry *dentry; | |
67207b96 AB |
476 | int ret; |
477 | ||
67207b96 | 478 | ret = -EINVAL; |
6263203e AB |
479 | /* check if we are on spufs */ |
480 | if (nd->dentry->d_sb->s_type != &spufs_type) | |
67207b96 AB |
481 | goto out; |
482 | ||
6263203e | 483 | /* don't accept undefined flags */ |
9add11da | 484 | if (flags & (~SPU_CREATE_FLAG_ALL)) |
c9832948 | 485 | goto out; |
486 | ||
6263203e AB |
487 | /* only threads can be underneath a gang */ |
488 | if (nd->dentry != nd->dentry->d_sb->s_root) { | |
489 | if ((flags & SPU_CREATE_GANG) || | |
490 | !SPUFS_I(nd->dentry->d_inode)->i_gang) | |
491 | goto out; | |
492 | } | |
493 | ||
67207b96 AB |
494 | dentry = lookup_create(nd, 1); |
495 | ret = PTR_ERR(dentry); | |
496 | if (IS_ERR(dentry)) | |
497 | goto out_dir; | |
498 | ||
499 | ret = -EEXIST; | |
500 | if (dentry->d_inode) | |
501 | goto out_dput; | |
502 | ||
503 | mode &= ~current->fs->umask; | |
67207b96 | 504 | |
6263203e AB |
505 | if (flags & SPU_CREATE_GANG) |
506 | return spufs_create_gang(nd->dentry->d_inode, | |
507 | dentry, nd->mnt, mode); | |
508 | else | |
509 | return spufs_create_context(nd->dentry->d_inode, | |
510 | dentry, nd->mnt, flags, mode); | |
67207b96 AB |
511 | |
512 | out_dput: | |
513 | dput(dentry); | |
514 | out_dir: | |
1b1dcc1b | 515 | mutex_unlock(&nd->dentry->d_inode->i_mutex); |
67207b96 AB |
516 | out: |
517 | return ret; | |
518 | } | |
519 | ||
520 | /* File system initialization */ | |
521 | enum { | |
f11f5ee7 | 522 | Opt_uid, Opt_gid, Opt_mode, Opt_err, |
67207b96 AB |
523 | }; |
524 | ||
525 | static match_table_t spufs_tokens = { | |
f11f5ee7 JK |
526 | { Opt_uid, "uid=%d" }, |
527 | { Opt_gid, "gid=%d" }, | |
528 | { Opt_mode, "mode=%o" }, | |
529 | { Opt_err, NULL }, | |
67207b96 AB |
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; | |
f11f5ee7 JK |
556 | case Opt_mode: |
557 | if (match_octal(&args[0], &option)) | |
558 | return 0; | |
559 | root->i_mode = option | S_IFDIR; | |
560 | break; | |
67207b96 AB |
561 | default: |
562 | return 0; | |
563 | } | |
564 | } | |
565 | return 1; | |
566 | } | |
567 | ||
db1384b4 AM |
568 | static void spufs_exit_isolated_loader(void) |
569 | { | |
570 | kfree(isolated_loader); | |
571 | } | |
572 | ||
0afacde3 | 573 | static void |
574 | spufs_init_isolated_loader(void) | |
575 | { | |
576 | struct device_node *dn; | |
577 | const char *loader; | |
578 | int size; | |
579 | ||
580 | dn = of_find_node_by_path("/spu-isolation"); | |
581 | if (!dn) | |
582 | return; | |
583 | ||
e2eb6392 | 584 | loader = of_get_property(dn, "loader", &size); |
0afacde3 | 585 | if (!loader) |
586 | return; | |
587 | ||
588 | /* kmalloc should align on a 16 byte boundary..* */ | |
589 | isolated_loader = kmalloc(size, GFP_KERNEL); | |
590 | if (!isolated_loader) | |
591 | return; | |
592 | ||
593 | memcpy(isolated_loader, loader, size); | |
594 | printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); | |
595 | } | |
596 | ||
67207b96 | 597 | static int |
8b3d6663 AB |
598 | spufs_create_root(struct super_block *sb, void *data) |
599 | { | |
67207b96 AB |
600 | struct inode *inode; |
601 | int ret; | |
602 | ||
603 | ret = -ENOMEM; | |
604 | inode = spufs_new_inode(sb, S_IFDIR | 0775); | |
605 | if (!inode) | |
606 | goto out; | |
607 | ||
608 | inode->i_op = &spufs_dir_inode_operations; | |
609 | inode->i_fop = &simple_dir_operations; | |
610 | SPUFS_I(inode)->i_ctx = NULL; | |
611 | ||
612 | ret = -EINVAL; | |
613 | if (!spufs_parse_options(data, inode)) | |
614 | goto out_iput; | |
615 | ||
616 | ret = -ENOMEM; | |
617 | sb->s_root = d_alloc_root(inode); | |
618 | if (!sb->s_root) | |
619 | goto out_iput; | |
620 | ||
621 | return 0; | |
622 | out_iput: | |
623 | iput(inode); | |
624 | out: | |
625 | return ret; | |
626 | } | |
627 | ||
628 | static int | |
629 | spufs_fill_super(struct super_block *sb, void *data, int silent) | |
630 | { | |
631 | static struct super_operations s_ops = { | |
632 | .alloc_inode = spufs_alloc_inode, | |
633 | .destroy_inode = spufs_destroy_inode, | |
634 | .statfs = simple_statfs, | |
635 | .delete_inode = spufs_delete_inode, | |
636 | .drop_inode = generic_delete_inode, | |
637 | }; | |
638 | ||
639 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
640 | sb->s_blocksize = PAGE_CACHE_SIZE; | |
641 | sb->s_blocksize_bits = PAGE_CACHE_SHIFT; | |
642 | sb->s_magic = SPUFS_MAGIC; | |
643 | sb->s_op = &s_ops; | |
644 | ||
645 | return spufs_create_root(sb, data); | |
646 | } | |
647 | ||
454e2398 | 648 | static int |
67207b96 | 649 | spufs_get_sb(struct file_system_type *fstype, int flags, |
454e2398 | 650 | const char *name, void *data, struct vfsmount *mnt) |
67207b96 | 651 | { |
454e2398 | 652 | return get_sb_single(fstype, flags, data, spufs_fill_super, mnt); |
67207b96 AB |
653 | } |
654 | ||
655 | static struct file_system_type spufs_type = { | |
656 | .owner = THIS_MODULE, | |
657 | .name = "spufs", | |
658 | .get_sb = spufs_get_sb, | |
659 | .kill_sb = kill_litter_super, | |
660 | }; | |
661 | ||
e78b47a5 | 662 | static int __init spufs_init(void) |
67207b96 AB |
663 | { |
664 | int ret; | |
bf1ab978 | 665 | |
ccf17e9d JK |
666 | ret = -ENODEV; |
667 | if (!spu_management_ops) | |
668 | goto out; | |
669 | ||
67207b96 AB |
670 | ret = -ENOMEM; |
671 | spufs_inode_cache = kmem_cache_create("spufs_inode_cache", | |
672 | sizeof(struct spufs_inode_info), 0, | |
673 | SLAB_HWCACHE_ALIGN, spufs_init_once, NULL); | |
674 | ||
675 | if (!spufs_inode_cache) | |
676 | goto out; | |
c99c1994 | 677 | ret = spu_sched_init(); |
67207b96 AB |
678 | if (ret) |
679 | goto out_cache; | |
c99c1994 AM |
680 | ret = register_filesystem(&spufs_type); |
681 | if (ret) | |
682 | goto out_sched; | |
67207b96 | 683 | ret = register_spu_syscalls(&spufs_calls); |
bf1ab978 DGM |
684 | if (ret) |
685 | goto out_fs; | |
686 | ret = register_arch_coredump_calls(&spufs_coredump_calls); | |
67207b96 | 687 | if (ret) |
c99c1994 | 688 | goto out_syscalls; |
0afacde3 | 689 | |
690 | spufs_init_isolated_loader(); | |
bf1ab978 | 691 | |
67207b96 | 692 | return 0; |
c99c1994 AM |
693 | |
694 | out_syscalls: | |
695 | unregister_spu_syscalls(&spufs_calls); | |
67207b96 AB |
696 | out_fs: |
697 | unregister_filesystem(&spufs_type); | |
c99c1994 AM |
698 | out_sched: |
699 | spu_sched_exit(); | |
67207b96 AB |
700 | out_cache: |
701 | kmem_cache_destroy(spufs_inode_cache); | |
702 | out: | |
703 | return ret; | |
704 | } | |
705 | module_init(spufs_init); | |
706 | ||
e78b47a5 | 707 | static void __exit spufs_exit(void) |
67207b96 | 708 | { |
8b3d6663 | 709 | spu_sched_exit(); |
db1384b4 | 710 | spufs_exit_isolated_loader(); |
bf1ab978 | 711 | unregister_arch_coredump_calls(&spufs_coredump_calls); |
67207b96 AB |
712 | unregister_spu_syscalls(&spufs_calls); |
713 | unregister_filesystem(&spufs_type); | |
714 | kmem_cache_destroy(spufs_inode_cache); | |
715 | } | |
716 | module_exit(spufs_exit); | |
717 | ||
718 | MODULE_LICENSE("GPL"); | |
719 | MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); | |
720 |