inode.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2
  3/*
  4 * SPU file system
  5 *
  6 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
  7 *
  8 * Author: Arnd Bergmann <arndb@de.ibm.com>
  9 */
 10
 11#include <linux/file.h>
 12#include <linux/fs.h>
 13#include <linux/fs_context.h>
 14#include <linux/fs_parser.h>
 15#include <linux/fsnotify.h>
 16#include <linux/backing-dev.h>
 17#include <linux/init.h>
 18#include <linux/ioctl.h>
 19#include <linux/module.h>
 20#include <linux/mount.h>
 21#include <linux/namei.h>
 22#include <linux/pagemap.h>
 23#include <linux/poll.h>
 24#include <linux/of.h>
 25#include <linux/seq_file.h>
 26#include <linux/slab.h>
 27
 28#include <asm/spu.h>
 29#include <asm/spu_priv1.h>
 30#include <linux/uaccess.h>
 31
 32#include "spufs.h"
 33
 34struct spufs_sb_info {
 35	bool debug;
 36};
 37
 38static struct kmem_cache *spufs_inode_cache;
 39char *isolated_loader;
 40static int isolated_loader_size;
 41
 42static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb)
 43{
 44	return sb->s_fs_info;
 45}
 46
 47static struct inode *
 48spufs_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
 63static void spufs_free_inode(struct inode *inode)
 64{
 65	kmem_cache_free(spufs_inode_cache, SPUFS_I(inode));
 66}
 67
 68static void
 69spufs_init_once(void *p)
 70{
 71	struct spufs_inode_info *ei = p;
 72
 73	inode_init_once(&ei->vfs_inode);
 74}
 75
 76static struct inode *
 77spufs_new_inode(struct super_block *sb, umode_t mode)
 78{
 79	struct inode *inode;
 80
 81	inode = new_inode(sb);
 82	if (!inode)
 83		goto out;
 84
 85	inode->i_ino = get_next_ino();
 86	inode->i_mode = mode;
 87	inode->i_uid = current_fsuid();
 88	inode->i_gid = current_fsgid();
 89	simple_inode_init_ts(inode);
 90out:
 91	return inode;
 92}
 93
 94static int
 95spufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 96	      struct iattr *attr)
 97{
 98	struct inode *inode = d_inode(dentry);
 99
100	if ((attr->ia_valid & ATTR_SIZE) &&
101	    (attr->ia_size != inode->i_size))
102		return -EINVAL;
103	setattr_copy(&nop_mnt_idmap, inode, attr);
104	mark_inode_dirty(inode);
105	return 0;
106}
107
108
109static int
110spufs_new_file(struct super_block *sb, struct dentry *dentry,
111		const struct file_operations *fops, umode_t mode,
112		size_t size, struct spu_context *ctx)
113{
114	static const struct inode_operations spufs_file_iops = {
115		.setattr = spufs_setattr,
116	};
117	struct inode *inode;
118	int ret;
119
120	ret = -ENOSPC;
121	inode = spufs_new_inode(sb, S_IFREG | mode);
122	if (!inode)
123		goto out;
124
125	ret = 0;
126	inode->i_op = &spufs_file_iops;
127	inode->i_fop = fops;
128	inode->i_size = size;
129	inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx);
130	d_make_persistent(dentry, inode);
131out:
132	return ret;
133}
134
135static void
136spufs_evict_inode(struct inode *inode)
137{
138	struct spufs_inode_info *ei = SPUFS_I(inode);
139	clear_inode(inode);
140	if (ei->i_ctx)
141		put_spu_context(ei->i_ctx);
142	if (ei->i_gang)
143		put_spu_gang(ei->i_gang);
144}
145
146/* Caller must hold parent->i_mutex */
147static void spufs_rmdir(struct inode *parent, struct dentry *dir)
148{
149	struct spu_context *ctx = SPUFS_I(d_inode(dir))->i_ctx;
150
151	locked_recursive_removal(dir, NULL);
152	spu_forget(ctx);
153}
154
155static int spufs_fill_dir(struct dentry *dir,
156		const struct spufs_tree_descr *files, umode_t mode,
157		struct spu_context *ctx)
158{
159	while (files->name && files->name[0]) {
160		int ret;
161		struct dentry *dentry = d_alloc_name(dir, files->name);
162		if (!dentry)
163			return -ENOMEM;
164		ret = spufs_new_file(dir->d_sb, dentry, files->ops,
165					files->mode & mode, files->size, ctx);
166		dput(dentry);
167		if (ret)
168			return ret;
169		files++;
170	}
171	return 0;
172}
173
174static void unuse_gang(struct dentry *dir)
175{
176	struct inode *inode = dir->d_inode;
177	struct spu_gang *gang = SPUFS_I(inode)->i_gang;
178
179	if (gang) {
180		bool dead;
181
182		inode_lock(inode); // exclusion with spufs_create_context()
183		dead = !--gang->alive;
184		inode_unlock(inode);
185
186		if (dead)
187			simple_recursive_removal(dir, NULL);
188	}
189}
190
191static int spufs_dir_close(struct inode *inode, struct file *file)
192{
193	struct inode *parent;
194	struct dentry *dir;
195
196	dir = file->f_path.dentry;
197	parent = d_inode(dir->d_parent);
198
199	inode_lock_nested(parent, I_MUTEX_PARENT);
200	spufs_rmdir(parent, dir);
201	inode_unlock(parent);
202
203	unuse_gang(dir->d_parent);
204	return dcache_dir_close(inode, file);
205}
206
207const struct file_operations spufs_context_fops = {
208	.open		= dcache_dir_open,
209	.release	= spufs_dir_close,
210	.llseek		= dcache_dir_lseek,
211	.read		= generic_read_dir,
212	.iterate_shared	= dcache_readdir,
213	.fsync		= noop_fsync,
214};
215EXPORT_SYMBOL_GPL(spufs_context_fops);
216
217static int
218spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
219		umode_t mode)
220{
221	int ret;
222	struct inode *inode;
223	struct spu_context *ctx;
224
225	inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);
226	if (!inode)
227		return -ENOSPC;
228
229	inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR);
230	ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */
231	SPUFS_I(inode)->i_ctx = ctx;
232	if (!ctx) {
233		iput(inode);
234		return -ENOSPC;
235	}
236
237	ctx->flags = flags;
238	inode->i_op = &simple_dir_inode_operations;
239	inode->i_fop = &simple_dir_operations;
240
241	inode_lock(inode);
242
243	inc_nlink(dir);
244	inc_nlink(inode);
245
246	d_make_persistent(dentry, inode);
247
248	if (flags & SPU_CREATE_NOSCHED)
249		ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents,
250					 mode, ctx);
251	else
252		ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
253
254	if (!ret && spufs_get_sb_info(dir->i_sb)->debug)
255		ret = spufs_fill_dir(dentry, spufs_dir_debug_contents,
256				mode, ctx);
257
258	inode_unlock(inode);
259
260	if (ret)
261		spufs_rmdir(dir, dentry);
262
263	return ret;
264}
265
266static int spufs_context_open(const struct path *path)
267{
268	FD_PREPARE(fdf, 0, dentry_open(path, O_RDONLY, current_cred()));
269	if (fdf.err)
270		return fdf.err;
271	fd_prepare_file(fdf)->f_op = &spufs_context_fops;
272	return fd_publish(fdf);
273}
274
275static struct spu_context *
276spufs_assert_affinity(unsigned int flags, struct spu_gang *gang,
277						struct file *filp)
278{
279	struct spu_context *tmp, *neighbor, *err;
280	int count, node;
281	int aff_supp;
282
283	aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next,
284					struct spu, cbe_list))->aff_list);
285
286	if (!aff_supp)
287		return ERR_PTR(-EINVAL);
288
289	if (flags & SPU_CREATE_GANG)
290		return ERR_PTR(-EINVAL);
291
292	if (flags & SPU_CREATE_AFFINITY_MEM &&
293	    gang->aff_ref_ctx &&
294	    gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM)
295		return ERR_PTR(-EEXIST);
296
297	if (gang->aff_flags & AFF_MERGED)
298		return ERR_PTR(-EBUSY);
299
300	neighbor = NULL;
301	if (flags & SPU_CREATE_AFFINITY_SPU) {
302		if (!filp || filp->f_op != &spufs_context_fops)
303			return ERR_PTR(-EINVAL);
304
305		neighbor = get_spu_context(
306				SPUFS_I(file_inode(filp))->i_ctx);
307
308		if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) &&
309		    !list_is_last(&neighbor->aff_list, &gang->aff_list_head) &&
310		    !list_entry(neighbor->aff_list.next, struct spu_context,
311		    aff_list)->aff_head) {
312			err = ERR_PTR(-EEXIST);
313			goto out_put_neighbor;
314		}
315
316		if (gang != neighbor->gang) {
317			err = ERR_PTR(-EINVAL);
318			goto out_put_neighbor;
319		}
320
321		count = 1;
322		list_for_each_entry(tmp, &gang->aff_list_head, aff_list)
323			count++;
324		if (list_empty(&neighbor->aff_list))
325			count++;
326
327		for (node = 0; node < MAX_NUMNODES; node++) {
328			if ((cbe_spu_info[node].n_spus - atomic_read(
329				&cbe_spu_info[node].reserved_spus)) >= count)
330				break;
331		}
332
333		if (node == MAX_NUMNODES) {
334			err = ERR_PTR(-EEXIST);
335			goto out_put_neighbor;
336		}
337	}
338
339	return neighbor;
340
341out_put_neighbor:
342	put_spu_context(neighbor);
343	return err;
344}
345
346static void
347spufs_set_affinity(unsigned int flags, struct spu_context *ctx,
348					struct spu_context *neighbor)
349{
350	if (flags & SPU_CREATE_AFFINITY_MEM)
351		ctx->gang->aff_ref_ctx = ctx;
352
353	if (flags & SPU_CREATE_AFFINITY_SPU) {
354		if (list_empty(&neighbor->aff_list)) {
355			list_add_tail(&neighbor->aff_list,
356				&ctx->gang->aff_list_head);
357			neighbor->aff_head = 1;
358		}
359
360		if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head)
361		    || list_entry(neighbor->aff_list.next, struct spu_context,
362							aff_list)->aff_head) {
363			list_add(&ctx->aff_list, &neighbor->aff_list);
364		} else  {
365			list_add_tail(&ctx->aff_list, &neighbor->aff_list);
366			if (neighbor->aff_head) {
367				neighbor->aff_head = 0;
368				ctx->aff_head = 1;
369			}
370		}
371
372		if (!ctx->gang->aff_ref_ctx)
373			ctx->gang->aff_ref_ctx = ctx;
374	}
375}
376
377static int
378spufs_create_context(struct inode *inode, struct dentry *dentry,
379			struct vfsmount *mnt, int flags, umode_t mode,
380			struct file *aff_filp)
381{
382	int ret;
383	int affinity;
384	struct spu_gang *gang = SPUFS_I(inode)->i_gang;
385	struct spu_context *neighbor;
386	struct path path = {.mnt = mnt, .dentry = dentry};
387
388	if ((flags & SPU_CREATE_NOSCHED) &&
389	    !capable(CAP_SYS_NICE))
390		return -EPERM;
391
392	if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE))
393	    == SPU_CREATE_ISOLATE)
394		return -EINVAL;
395
396	if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader)
397		return -ENODEV;
398
399	if (gang) {
400		if (!gang->alive)
401			return -ENOENT;
402		gang->alive++;
403	}
404
405	neighbor = NULL;
406	affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU);
407	if (affinity) {
408		if (!gang)
409			return -EINVAL;
410		mutex_lock(&gang->aff_mutex);
411		neighbor = spufs_assert_affinity(flags, gang, aff_filp);
412		if (IS_ERR(neighbor)) {
413			ret = PTR_ERR(neighbor);
414			goto out_aff_unlock;
415		}
416	}
417
418	ret = spufs_mkdir(inode, dentry, flags, mode & 0777);
419	if (ret) {
420		if (neighbor)
421			put_spu_context(neighbor);
422		goto out_aff_unlock;
423	}
424
425	if (affinity) {
426		spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx,
427								neighbor);
428		if (neighbor)
429			put_spu_context(neighbor);
430	}
431
432	ret = spufs_context_open(&path);
433	if (ret < 0)
434		spufs_rmdir(inode, dentry);
435
436out_aff_unlock:
437	if (affinity)
438		mutex_unlock(&gang->aff_mutex);
439	if (ret && gang)
440		gang->alive--; // can't reach 0
441	return ret;
442}
443
444static int
445spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode)
446{
447	int ret;
448	struct inode *inode;
449	struct spu_gang *gang;
450
451	ret = -ENOSPC;
452	inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);
453	if (!inode)
454		goto out;
455
456	ret = 0;
457	inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR);
458	gang = alloc_spu_gang();
459	SPUFS_I(inode)->i_ctx = NULL;
460	SPUFS_I(inode)->i_gang = gang;
461	if (!gang) {
462		ret = -ENOMEM;
463		goto out_iput;
464	}
465
466	inode->i_op = &simple_dir_inode_operations;
467	inode->i_fop = &simple_dir_operations;
468
469	inc_nlink(dir);
470	inc_nlink(inode);
471	d_make_persistent(dentry, inode);
472	return ret;
473
474out_iput:
475	iput(inode);
476out:
477	return ret;
478}
479
480static int spufs_gang_close(struct inode *inode, struct file *file)
481{
482	unuse_gang(file->f_path.dentry);
483	return dcache_dir_close(inode, file);
484}
485
486static const struct file_operations spufs_gang_fops = {
487	.open		= dcache_dir_open,
488	.release	= spufs_gang_close,
489	.llseek		= dcache_dir_lseek,
490	.read		= generic_read_dir,
491	.iterate_shared	= dcache_readdir,
492	.fsync		= noop_fsync,
493};
494
495static int spufs_gang_open(const struct path *path)
496{
497	/*
498	 * get references for dget and mntget, will be released
499	 * in error path of *_open().
500	 */
501	FD_PREPARE(fdf, 0, dentry_open(path, O_RDONLY, current_cred()));
502	if (fdf.err)
503		return fdf.err;
504	fd_prepare_file(fdf)->f_op = &spufs_gang_fops;
505	return fd_publish(fdf);
506}
507
508static int spufs_create_gang(struct inode *inode,
509			struct dentry *dentry,
510			struct vfsmount *mnt, umode_t mode)
511{
512	struct path path = {.mnt = mnt, .dentry = dentry};
513	int ret;
514
515	ret = spufs_mkgang(inode, dentry, mode & 0777);
516	if (!ret) {
517		ret = spufs_gang_open(&path);
518		if (ret < 0)
519			unuse_gang(dentry);
520	}
521	return ret;
522}
523
524
525static struct file_system_type spufs_type;
526
527long spufs_create(const struct path *path, struct dentry *dentry,
528		unsigned int flags, umode_t mode, struct file *filp)
529{
530	struct inode *dir = d_inode(path->dentry);
531	int ret;
532
533	/* check if we are on spufs */
534	if (path->dentry->d_sb->s_type != &spufs_type)
535		return -EINVAL;
536
537	/* don't accept undefined flags */
538	if (flags & (~SPU_CREATE_FLAG_ALL))
539		return -EINVAL;
540
541	/* only threads can be underneath a gang */
542	if (path->dentry != path->dentry->d_sb->s_root)
543		if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang)
544			return -EINVAL;
545
546	mode &= ~current_umask();
547
548	if (flags & SPU_CREATE_GANG)
549		ret = spufs_create_gang(dir, dentry, path->mnt, mode);
550	else
551		ret = spufs_create_context(dir, dentry, path->mnt, flags, mode,
552					    filp);
553	if (ret >= 0)
554		fsnotify_mkdir(dir, dentry);
555
556	return ret;
557}
558
559/* File system initialization */
560struct spufs_fs_context {
561	kuid_t	uid;
562	kgid_t	gid;
563	umode_t	mode;
564};
565
566enum {
567	Opt_uid, Opt_gid, Opt_mode, Opt_debug,
568};
569
570static const struct fs_parameter_spec spufs_fs_parameters[] = {
571	fsparam_u32	("gid",				Opt_gid),
572	fsparam_u32oct	("mode",			Opt_mode),
573	fsparam_u32	("uid",				Opt_uid),
574	fsparam_flag	("debug",			Opt_debug),
575	{}
576};
577
578static int spufs_show_options(struct seq_file *m, struct dentry *root)
579{
580	struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb);
581	struct inode *inode = root->d_inode;
582
583	if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID))
584		seq_printf(m, ",uid=%u",
585			   from_kuid_munged(&init_user_ns, inode->i_uid));
586	if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID))
587		seq_printf(m, ",gid=%u",
588			   from_kgid_munged(&init_user_ns, inode->i_gid));
589	if ((inode->i_mode & S_IALLUGO) != 0775)
590		seq_printf(m, ",mode=%o", inode->i_mode);
591	if (sbi->debug)
592		seq_puts(m, ",debug");
593	return 0;
594}
595
596static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param)
597{
598	struct spufs_fs_context *ctx = fc->fs_private;
599	struct spufs_sb_info *sbi = fc->s_fs_info;
600	struct fs_parse_result result;
601	kuid_t uid;
602	kgid_t gid;
603	int opt;
604
605	opt = fs_parse(fc, spufs_fs_parameters, param, &result);
606	if (opt < 0)
607		return opt;
608
609	switch (opt) {
610	case Opt_uid:
611		uid = make_kuid(current_user_ns(), result.uint_32);
612		if (!uid_valid(uid))
613			return invalf(fc, "Unknown uid");
614		ctx->uid = uid;
615		break;
616	case Opt_gid:
617		gid = make_kgid(current_user_ns(), result.uint_32);
618		if (!gid_valid(gid))
619			return invalf(fc, "Unknown gid");
620		ctx->gid = gid;
621		break;
622	case Opt_mode:
623		ctx->mode = result.uint_32 & S_IALLUGO;
624		break;
625	case Opt_debug:
626		sbi->debug = true;
627		break;
628	}
629
630	return 0;
631}
632
633static void spufs_exit_isolated_loader(void)
634{
635	free_pages((unsigned long) isolated_loader,
636			get_order(isolated_loader_size));
637}
638
639static void __init
640spufs_init_isolated_loader(void)
641{
642	struct device_node *dn;
643	const char *loader;
644	int size;
645
646	dn = of_find_node_by_path("/spu-isolation");
647	if (!dn)
648		return;
649
650	loader = of_get_property(dn, "loader", &size);
651	of_node_put(dn);
652	if (!loader)
653		return;
654
655	/* the loader must be align on a 16 byte boundary */
656	isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size));
657	if (!isolated_loader)
658		return;
659
660	isolated_loader_size = size;
661	memcpy(isolated_loader, loader, size);
662	printk(KERN_INFO "spufs: SPU isolation mode enabled\n");
663}
664
665static int spufs_create_root(struct super_block *sb, struct fs_context *fc)
666{
667	struct spufs_fs_context *ctx = fc->fs_private;
668	struct inode *inode;
669
670	if (!spu_management_ops)
671		return -ENODEV;
672
673	inode = spufs_new_inode(sb, S_IFDIR | ctx->mode);
674	if (!inode)
675		return -ENOMEM;
676
677	inode->i_uid = ctx->uid;
678	inode->i_gid = ctx->gid;
679	inode->i_op = &simple_dir_inode_operations;
680	inode->i_fop = &simple_dir_operations;
681	SPUFS_I(inode)->i_ctx = NULL;
682	inc_nlink(inode);
683
684	sb->s_root = d_make_root(inode);
685	if (!sb->s_root)
686		return -ENOMEM;
687	return 0;
688}
689
690static const struct super_operations spufs_ops = {
691	.alloc_inode	= spufs_alloc_inode,
692	.free_inode	= spufs_free_inode,
693	.statfs		= simple_statfs,
694	.evict_inode	= spufs_evict_inode,
695	.show_options	= spufs_show_options,
696};
697
698static int spufs_fill_super(struct super_block *sb, struct fs_context *fc)
699{
700	sb->s_maxbytes = MAX_LFS_FILESIZE;
701	sb->s_blocksize = PAGE_SIZE;
702	sb->s_blocksize_bits = PAGE_SHIFT;
703	sb->s_magic = SPUFS_MAGIC;
704	sb->s_op = &spufs_ops;
705
706	return spufs_create_root(sb, fc);
707}
708
709static int spufs_get_tree(struct fs_context *fc)
710{
711	return get_tree_single(fc, spufs_fill_super);
712}
713
714static void spufs_free_fc(struct fs_context *fc)
715{
716	kfree(fc->s_fs_info);
717}
718
719static const struct fs_context_operations spufs_context_ops = {
720	.free		= spufs_free_fc,
721	.parse_param	= spufs_parse_param,
722	.get_tree	= spufs_get_tree,
723};
724
725static int spufs_init_fs_context(struct fs_context *fc)
726{
727	struct spufs_fs_context *ctx;
728	struct spufs_sb_info *sbi;
729
730	ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL);
731	if (!ctx)
732		goto nomem;
733
734	sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL);
735	if (!sbi)
736		goto nomem_ctx;
737
738	ctx->uid = current_uid();
739	ctx->gid = current_gid();
740	ctx->mode = 0755;
741
742	fc->fs_private = ctx;
743	fc->s_fs_info = sbi;
744	fc->ops = &spufs_context_ops;
745	return 0;
746
747nomem_ctx:
748	kfree(ctx);
749nomem:
750	return -ENOMEM;
751}
752
753static struct file_system_type spufs_type = {
754	.owner = THIS_MODULE,
755	.name = "spufs",
756	.init_fs_context = spufs_init_fs_context,
757	.parameters	= spufs_fs_parameters,
758	.kill_sb = kill_anon_super,
759};
760MODULE_ALIAS_FS("spufs");
761
762static int __init spufs_init(void)
763{
764	int ret;
765
766	ret = -ENODEV;
767	if (!spu_management_ops)
768		goto out;
769
770	ret = -ENOMEM;
771	spufs_inode_cache = kmem_cache_create("spufs_inode_cache",
772			sizeof(struct spufs_inode_info), 0,
773			SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once);
774
775	if (!spufs_inode_cache)
776		goto out;
777	ret = spu_sched_init();
778	if (ret)
779		goto out_cache;
780	ret = register_spu_syscalls(&spufs_calls);
781	if (ret)
782		goto out_sched;
783	ret = register_filesystem(&spufs_type);
784	if (ret)
785		goto out_syscalls;
786
787	spufs_init_isolated_loader();
788
789	return 0;
790
791out_syscalls:
792	unregister_spu_syscalls(&spufs_calls);
793out_sched:
794	spu_sched_exit();
795out_cache:
796	kmem_cache_destroy(spufs_inode_cache);
797out:
798	return ret;
799}
800module_init(spufs_init);
801
802static void __exit spufs_exit(void)
803{
804	spu_sched_exit();
805	spufs_exit_isolated_loader();
806	unregister_spu_syscalls(&spufs_calls);
807	unregister_filesystem(&spufs_type);
808	kmem_cache_destroy(spufs_inode_cache);
809}
810module_exit(spufs_exit);
811
812MODULE_DESCRIPTION("SPU file system");
813MODULE_LICENSE("GPL");
814MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
815