[net-next-2.6.git] / arch / powerpc / platforms / cell / spufs / inode.c

/*
 * SPU file system
 *
 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
 *
 * Author: Arnd Bergmann <arndb@de.ibm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/file.h>
#include <linux/fs.h>
#include <linux/backing-dev.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/module.h>
#include <linux/namei.h>
#include <linux/pagemap.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/parser.h>

#include <asm/io.h>
#include <asm/semaphore.h>
#include <asm/spu.h>
#include <asm/uaccess.h>

#include "spufs.h"

static kmem_cache_t *spufs_inode_cache;

static struct inode *
spufs_alloc_inode(struct super_block *sb)
{
	struct spufs_inode_info *ei;

	ei = kmem_cache_alloc(spufs_inode_cache, SLAB_KERNEL);
	if (!ei)
		return NULL;
	return &ei->vfs_inode;
}

static void
spufs_destroy_inode(struct inode *inode)
{
	kmem_cache_free(spufs_inode_cache, SPUFS_I(inode));
}

static void
spufs_init_once(void *p, kmem_cache_t * cachep, unsigned long flags)
{
	struct spufs_inode_info *ei = p;

	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
	    SLAB_CTOR_CONSTRUCTOR) {
		inode_init_once(&ei->vfs_inode);
	}
}

static struct inode *
spufs_new_inode(struct super_block *sb, int mode)
{
	struct inode *inode;

	inode = new_inode(sb);
	if (!inode)
		goto out;

	inode->i_mode = mode;
	inode->i_uid = current->fsuid;
	inode->i_gid = current->fsgid;
	inode->i_blksize = PAGE_CACHE_SIZE;
	inode->i_blocks = 0;
	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
out:
	return inode;
}

static int
spufs_setattr(struct dentry *dentry, struct iattr *attr)
{
	struct inode *inode = dentry->d_inode;

	if ((attr->ia_valid & ATTR_SIZE) &&
	    (attr->ia_size != inode->i_size))
		return -EINVAL;
	return inode_setattr(inode, attr);
}


static int
spufs_new_file(struct super_block *sb, struct dentry *dentry,
		struct file_operations *fops, int mode,
		struct spu_context *ctx)
{
	static struct inode_operations spufs_file_iops = {
		.setattr = spufs_setattr,
	};
	struct inode *inode;
	int ret;

	ret = -ENOSPC;
	inode = spufs_new_inode(sb, S_IFREG | mode);
	if (!inode)
		goto out;

	ret = 0;
	inode->i_op = &spufs_file_iops;
	inode->i_fop = fops;
	inode->u.generic_ip = SPUFS_I(inode)->i_ctx = get_spu_context(ctx);
	d_add(dentry, inode);
out:
	return ret;
}

static void
spufs_delete_inode(struct inode *inode)
{
	if (SPUFS_I(inode)->i_ctx)
		put_spu_context(SPUFS_I(inode)->i_ctx);
	clear_inode(inode);
}

static int
spufs_fill_dir(struct dentry *dir, struct tree_descr *files,
		int mode, struct spu_context *ctx)
{
	struct dentry *dentry;
	int ret;

	while (files->name && files->name[0]) {
		ret = -ENOMEM;
		dentry = d_alloc_name(dir, files->name);
		if (!dentry)
			goto out;
		ret = spufs_new_file(dir->d_sb, dentry, files->ops,
					files->mode & mode, ctx);
		if (ret)
			goto out;
		files++;
	}
	return 0;
out:
	// FIXME: remove all files that are left

	return ret;
}

static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
{
	struct dentry *dentry, *tmp;
	struct spu_context *ctx;
	int err;

	/* remove all entries */
	err = 0;
	list_for_each_entry_safe(dentry, tmp, &dir_dentry->d_subdirs, d_child) {
		spin_lock(&dcache_lock);
		spin_lock(&dentry->d_lock);
		if (!(d_unhashed(dentry)) && dentry->d_inode) {
			dget_locked(dentry);
			__d_drop(dentry);
			spin_unlock(&dentry->d_lock);
			simple_unlink(dir_dentry->d_inode, dentry);
			spin_unlock(&dcache_lock);
			dput(dentry);
		} else {
			spin_unlock(&dentry->d_lock);
			spin_unlock(&dcache_lock);
		}
	}

	/* We have to give up the mm_struct */
	ctx = SPUFS_I(dir_dentry->d_inode)->i_ctx;
	spu_forget(ctx);

	if (!err) {
		shrink_dcache_parent(dir_dentry);
		err = simple_rmdir(root, dir_dentry);
	}
	return err;
}

static int spufs_dir_close(struct inode *inode, struct file *file)
{
	struct inode *dir;
	struct dentry *dentry;
	int ret;

	dentry = file->f_dentry;
	dir = dentry->d_parent->d_inode;
	down(&dir->i_sem);
	ret = spufs_rmdir(dir, file->f_dentry);
	WARN_ON(ret);
	up(&dir->i_sem);
	return dcache_dir_close(inode, file);
}

struct inode_operations spufs_dir_inode_operations = {
	.lookup = simple_lookup,
};

struct file_operations spufs_autodelete_dir_operations = {
	.open		= dcache_dir_open,
	.release	= spufs_dir_close,
	.llseek		= dcache_dir_lseek,
	.read		= generic_read_dir,
	.readdir	= dcache_readdir,
	.fsync		= simple_sync_file,
};

static int
spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
	int ret;
	struct inode *inode;
	struct spu_context *ctx;

	ret = -ENOSPC;
	inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);
	if (!inode)
		goto out;

	if (dir->i_mode & S_ISGID) {
		inode->i_gid = dir->i_gid;
		inode->i_mode &= S_ISGID;
	}
	ctx = alloc_spu_context(inode->i_mapping);
	SPUFS_I(inode)->i_ctx = ctx;
	if (!ctx)
		goto out_iput;

	inode->i_op = &spufs_dir_inode_operations;
	inode->i_fop = &simple_dir_operations;
	ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
	if (ret)
		goto out_free_ctx;

	d_instantiate(dentry, inode);
	dget(dentry);
	dir->i_nlink++;
	goto out;

out_free_ctx:
	put_spu_context(ctx);
out_iput:
	iput(inode);
out:
	return ret;
}

long
spufs_create_thread(struct nameidata *nd, const char *name,
			unsigned int flags, mode_t mode)
{
	struct dentry *dentry;
	struct file *filp;
	int ret;

	/* need to be at the root of spufs */
	ret = -EINVAL;
	if (nd->dentry->d_sb->s_magic != SPUFS_MAGIC ||
		nd->dentry != nd->dentry->d_sb->s_root)
		goto out;

	dentry = lookup_create(nd, 1);
	ret = PTR_ERR(dentry);
	if (IS_ERR(dentry))
		goto out_dir;

	ret = -EEXIST;
	if (dentry->d_inode)
		goto out_dput;

	mode &= ~current->fs->umask;
	ret = spufs_mkdir(nd->dentry->d_inode, dentry, mode & S_IRWXUGO);
	if (ret)
		goto out_dput;

	ret = get_unused_fd();
	if (ret < 0)
		goto out_dput;

	dentry->d_inode->i_nlink++;

	filp = filp_open(name, O_RDONLY, mode);
	if (IS_ERR(filp)) {
		// FIXME: remove directory again
		put_unused_fd(ret);
		ret = PTR_ERR(filp);
	} else {
		filp->f_op = &spufs_autodelete_dir_operations;
		fd_install(ret, filp);
	}

out_dput:
	dput(dentry);
out_dir:
	up(&nd->dentry->d_inode->i_sem);
out:
	return ret;
}

/* File system initialization */
enum {
	Opt_uid, Opt_gid, Opt_err,
};

static match_table_t spufs_tokens = {
	{ Opt_uid, "uid=%d" },
	{ Opt_gid, "gid=%d" },
	{ Opt_err, NULL  },
};

static int
spufs_parse_options(char *options, struct inode *root)
{
	char *p;
	substring_t args[MAX_OPT_ARGS];

	while ((p = strsep(&options, ",")) != NULL) {
		int token, option;

		if (!*p)
			continue;

		token = match_token(p, spufs_tokens, args);
		switch (token) {
		case Opt_uid:
			if (match_int(&args[0], &option))
				return 0;
			root->i_uid = option;
			break;
		case Opt_gid:
			if (match_int(&args[0], &option))
				return 0;
			root->i_gid = option;
			break;
		default:
			return 0;
		}
	}
	return 1;
}

static int
spufs_create_root(struct super_block *sb, void *data)
{
	struct inode *inode;
	int ret;

	ret = -ENOMEM;
	inode = spufs_new_inode(sb, S_IFDIR | 0775);
	if (!inode)
		goto out;

	inode->i_op = &spufs_dir_inode_operations;
	inode->i_fop = &simple_dir_operations;
	SPUFS_I(inode)->i_ctx = NULL;

	ret = -EINVAL;
	if (!spufs_parse_options(data, inode))
		goto out_iput;

	ret = -ENOMEM;
	sb->s_root = d_alloc_root(inode);
	if (!sb->s_root)
		goto out_iput;

	return 0;
out_iput:
	iput(inode);
out:
	return ret;
}

static int
spufs_fill_super(struct super_block *sb, void *data, int silent)
{
	static struct super_operations s_ops = {
		.alloc_inode = spufs_alloc_inode,
		.destroy_inode = spufs_destroy_inode,
		.statfs = simple_statfs,
		.delete_inode = spufs_delete_inode,
		.drop_inode = generic_delete_inode,
	};

	sb->s_maxbytes = MAX_LFS_FILESIZE;
	sb->s_blocksize = PAGE_CACHE_SIZE;
	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	sb->s_magic = SPUFS_MAGIC;
	sb->s_op = &s_ops;

	return spufs_create_root(sb, data);
}

static struct super_block *
spufs_get_sb(struct file_system_type *fstype, int flags,
		const char *name, void *data)
{
	return get_sb_single(fstype, flags, data, spufs_fill_super);
}

static struct file_system_type spufs_type = {
	.owner = THIS_MODULE,
	.name = "spufs",
	.get_sb = spufs_get_sb,
	.kill_sb = kill_litter_super,
};

static int spufs_init(void)
{
	int ret;
	ret = -ENOMEM;
	spufs_inode_cache = kmem_cache_create("spufs_inode_cache",
			sizeof(struct spufs_inode_info), 0,
			SLAB_HWCACHE_ALIGN, spufs_init_once, NULL);

	if (!spufs_inode_cache)
		goto out;
	if (spu_sched_init() != 0) {
		kmem_cache_destroy(spufs_inode_cache);
		goto out;
	}
	ret = register_filesystem(&spufs_type);
	if (ret)
		goto out_cache;
	ret = register_spu_syscalls(&spufs_calls);
	if (ret)
		goto out_fs;
	return 0;
out_fs:
	unregister_filesystem(&spufs_type);
out_cache:
	kmem_cache_destroy(spufs_inode_cache);
out:
	return ret;
}
module_init(spufs_init);

static void spufs_exit(void)
{
	spu_sched_exit();
	unregister_spu_syscalls(&spufs_calls);
	unregister_filesystem(&spufs_type);
	kmem_cache_destroy(spufs_inode_cache);
}
module_exit(spufs_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
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>
	29	#include <linux/namei.h>
	30	#include <linux/pagemap.h>
	31	#include <linux/poll.h>
	32	#include <linux/slab.h>
	33	#include <linux/parser.h>
	34
	35	#include <asm/io.h>
	36	#include <asm/semaphore.h>
	37	#include <asm/spu.h>
	38	#include <asm/uaccess.h>
	39
	40	#include "spufs.h"
	41
	42	static kmem_cache_t *spufs_inode_cache;
	43
67207b96 AB	44	static struct inode *
	45	spufs_alloc_inode(struct super_block *sb)
	46	{
	47	struct spufs_inode_info *ei;
	48
	49	ei = kmem_cache_alloc(spufs_inode_cache, SLAB_KERNEL);
	50	if (!ei)
	51	return NULL;
	52	return &ei->vfs_inode;
	53	}
	54
	55	static void
	56	spufs_destroy_inode(struct inode *inode)
	57	{
	58	kmem_cache_free(spufs_inode_cache, SPUFS_I(inode));
	59	}
	60
	61	static void
	62	spufs_init_once(void p, kmem_cache_t cachep, unsigned long flags)
	63	{
	64	struct spufs_inode_info *ei = p;
	65
	66	if ((flags & (SLAB_CTOR_VERIFY\|SLAB_CTOR_CONSTRUCTOR)) ==
	67	SLAB_CTOR_CONSTRUCTOR) {
	68	inode_init_once(&ei->vfs_inode);
	69	}
	70	}
	71
	72	static struct inode *
	73	spufs_new_inode(struct super_block *sb, int mode)
	74	{
	75	struct inode *inode;
	76
	77	inode = new_inode(sb);
	78	if (!inode)
	79	goto out;
	80
	81	inode->i_mode = mode;
	82	inode->i_uid = current->fsuid;
	83	inode->i_gid = current->fsgid;
	84	inode->i_blksize = PAGE_CACHE_SIZE;
	85	inode->i_blocks = 0;
	86	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	87	out:
	88	return inode;
	89	}
	90
	91	static int
	92	spufs_setattr(struct dentry dentry, struct iattr attr)
	93	{
	94	struct inode *inode = dentry->d_inode;
	95
67207b96 AB	96	if ((attr->ia_valid & ATTR_SIZE) &&
	97	(attr->ia_size != inode->i_size))
	98	return -EINVAL;
	99	return inode_setattr(inode, attr);
	100	}
	101
	102
	103	static int
	104	spufs_new_file(struct super_block sb, struct dentry dentry,
	105	struct file_operations *fops, int mode,
	106	struct spu_context *ctx)
	107	{
	108	static struct inode_operations spufs_file_iops = {
67207b96	109	.setattr = spufs_setattr,
67207b96 AB	110	};
	111	struct inode *inode;
	112	int ret;
	113
	114	ret = -ENOSPC;
	115	inode = spufs_new_inode(sb, S_IFREG \| mode);
	116	if (!inode)
	117	goto out;
	118
	119	ret = 0;
	120	inode->i_op = &spufs_file_iops;
	121	inode->i_fop = fops;
	122	inode->u.generic_ip = SPUFS_I(inode)->i_ctx = get_spu_context(ctx);
	123	d_add(dentry, inode);
	124	out:
	125	return ret;
	126	}
	127
	128	static void
	129	spufs_delete_inode(struct inode *inode)
	130	{
	131	if (SPUFS_I(inode)->i_ctx)
	132	put_spu_context(SPUFS_I(inode)->i_ctx);
	133	clear_inode(inode);
	134	}
	135
	136	static int
	137	spufs_fill_dir(struct dentry dir, struct tree_descr files,
	138	int mode, struct spu_context *ctx)
	139	{
	140	struct dentry *dentry;
	141	int ret;
	142
	143	while (files->name && files->name[0]) {
	144	ret = -ENOMEM;
	145	dentry = d_alloc_name(dir, files->name);
	146	if (!dentry)
	147	goto out;
	148	ret = spufs_new_file(dir->d_sb, dentry, files->ops,
	149	files->mode & mode, ctx);
	150	if (ret)
	151	goto out;
	152	files++;
	153	}
	154	return 0;
	155	out:
	156	// FIXME: remove all files that are left
	157
	158	return ret;
	159	}
	160
	161	static int spufs_rmdir(struct inode root, struct dentry dir_dentry)
	162	{
8b3d6663 AB	163	struct dentry dentry, tmp;
8b3d6663 AB	164	struct spu_context *ctx;
67207b96 AB	165	int err;
67207b96 AB	166
67207b96 AB	167	/* remove all entries */
67207b96 AB	168	err = 0;
8b3d6663 AB	169	list_for_each_entry_safe(dentry, tmp, &dir_dentry->d_subdirs, d_child) {
8b3d6663 AB	170	spin_lock(&dcache_lock);
67207b96	171	spin_lock(&dentry->d_lock);
8b3d6663 AB	172	if (!(d_unhashed(dentry)) && dentry->d_inode) {
	173	dget_locked(dentry);
	174	__d_drop(dentry);
	175	spin_unlock(&dentry->d_lock);
	176	simple_unlink(dir_dentry->d_inode, dentry);
	177	spin_unlock(&dcache_lock);
	178	dput(dentry);
	179	} else {
	180	spin_unlock(&dentry->d_lock);
	181	spin_unlock(&dcache_lock);
	182	}
67207b96	183	}
8b3d6663 AB	184
	185	/* We have to give up the mm_struct */
	186	ctx = SPUFS_I(dir_dentry->d_inode)->i_ctx;
	187	spu_forget(ctx);
	188
67207b96 AB	189	if (!err) {
	190	shrink_dcache_parent(dir_dentry);
	191	err = simple_rmdir(root, dir_dentry);
	192	}
	193	return err;
	194	}
	195
	196	static int spufs_dir_close(struct inode inode, struct file file)
	197	{
	198	struct inode *dir;
	199	struct dentry *dentry;
	200	int ret;
	201
	202	dentry = file->f_dentry;
	203	dir = dentry->d_parent->d_inode;
	204	down(&dir->i_sem);
	205	ret = spufs_rmdir(dir, file->f_dentry);
	206	WARN_ON(ret);
	207	up(&dir->i_sem);
	208	return dcache_dir_close(inode, file);
	209	}
	210
	211	struct inode_operations spufs_dir_inode_operations = {
	212	.lookup = simple_lookup,
	213	};
	214
	215	struct file_operations spufs_autodelete_dir_operations = {
	216	.open = dcache_dir_open,
	217	.release = spufs_dir_close,
	218	.llseek = dcache_dir_lseek,
	219	.read = generic_read_dir,
	220	.readdir = dcache_readdir,
	221	.fsync = simple_sync_file,
	222	};
	223
	224	static int
	225	spufs_mkdir(struct inode dir, struct dentry dentry, int mode)
	226	{
	227	int ret;
	228	struct inode *inode;
	229	struct spu_context *ctx;
	230
	231	ret = -ENOSPC;
	232	inode = spufs_new_inode(dir->i_sb, mode \| S_IFDIR);
	233	if (!inode)
	234	goto out;
	235
	236	if (dir->i_mode & S_ISGID) {
	237	inode->i_gid = dir->i_gid;
	238	inode->i_mode &= S_ISGID;
	239	}
8b3d6663	240	ctx = alloc_spu_context(inode->i_mapping);
67207b96 AB	241	SPUFS_I(inode)->i_ctx = ctx;
	242	if (!ctx)
	243	goto out_iput;
	244
	245	inode->i_op = &spufs_dir_inode_operations;
	246	inode->i_fop = &simple_dir_operations;
	247	ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
	248	if (ret)
	249	goto out_free_ctx;
	250
	251	d_instantiate(dentry, inode);
	252	dget(dentry);
	253	dir->i_nlink++;
	254	goto out;
	255
	256	out_free_ctx:
	257	put_spu_context(ctx);
	258	out_iput:
	259	iput(inode);
	260	out:
	261	return ret;
	262	}
	263
	264	long
	265	spufs_create_thread(struct nameidata nd, const char name,
	266	unsigned int flags, mode_t mode)
	267	{
	268	struct dentry *dentry;
	269	struct file *filp;
	270	int ret;
	271
	272	/* need to be at the root of spufs */
	273	ret = -EINVAL;
	274	if (nd->dentry->d_sb->s_magic != SPUFS_MAGIC \|\|
	275	nd->dentry != nd->dentry->d_sb->s_root)
	276	goto out;
	277
	278	dentry = lookup_create(nd, 1);
	279	ret = PTR_ERR(dentry);
	280	if (IS_ERR(dentry))
	281	goto out_dir;
	282
	283	ret = -EEXIST;
	284	if (dentry->d_inode)
	285	goto out_dput;
	286
	287	mode &= ~current->fs->umask;
	288	ret = spufs_mkdir(nd->dentry->d_inode, dentry, mode & S_IRWXUGO);
	289	if (ret)
	290	goto out_dput;
	291
	292	ret = get_unused_fd();
	293	if (ret < 0)
	294	goto out_dput;
	295
	296	dentry->d_inode->i_nlink++;
	297
	298	filp = filp_open(name, O_RDONLY, mode);
	299	if (IS_ERR(filp)) {
	300	// FIXME: remove directory again
	301	put_unused_fd(ret);
	302	ret = PTR_ERR(filp);
	303	} else {
	304	filp->f_op = &spufs_autodelete_dir_operations;
305	fd_install(ret, filp);
306	}
307
308	out_dput:
309	dput(dentry);
310	out_dir:
311	up(&nd->dentry->d_inode->i_sem);
312	out:
313	return ret;
314	}
315
316	/* File system initialization */
317	enum {
318	Opt_uid, Opt_gid, Opt_err,
319	};
320
321	static match_table_t spufs_tokens = {
322	{ Opt_uid, "uid=%d" },
323	{ Opt_gid, "gid=%d" },
324	{ Opt_err, NULL },
325	};
326
327	static int
328	spufs_parse_options(char options, struct inode root)
329	{
330	char *p;
331	substring_t args[MAX_OPT_ARGS];
332
333	while ((p = strsep(&options, ",")) != NULL) {
334	int token, option;
335
336	if (!*p)
337	continue;
338
339	token = match_token(p, spufs_tokens, args);
340	switch (token) {
341	case Opt_uid:
342	if (match_int(&args[0], &option))
343	return 0;
344	root->i_uid = option;
345	break;
346	case Opt_gid:
347	if (match_int(&args[0], &option))
348	return 0;
349	root->i_gid = option;
350	break;
351	default:
352	return 0;
353	}
354	}
355	return 1;
356	}
357
358	static int
8b3d6663 AB	359	spufs_create_root(struct super_block sb, void data)
8b3d6663 AB	360	{
67207b96 AB	361	struct inode *inode;
	362	int ret;
	363
	364	ret = -ENOMEM;
	365	inode = spufs_new_inode(sb, S_IFDIR \| 0775);
	366	if (!inode)
	367	goto out;
	368
	369	inode->i_op = &spufs_dir_inode_operations;
	370	inode->i_fop = &simple_dir_operations;
	371	SPUFS_I(inode)->i_ctx = NULL;
	372
	373	ret = -EINVAL;
	374	if (!spufs_parse_options(data, inode))
	375	goto out_iput;
	376
	377	ret = -ENOMEM;
	378	sb->s_root = d_alloc_root(inode);
	379	if (!sb->s_root)
	380	goto out_iput;
	381
	382	return 0;
	383	out_iput:
	384	iput(inode);
	385	out:
	386	return ret;
	387	}
	388
	389	static int
	390	spufs_fill_super(struct super_block sb, void data, int silent)
	391	{
	392	static struct super_operations s_ops = {
	393	.alloc_inode = spufs_alloc_inode,
	394	.destroy_inode = spufs_destroy_inode,
	395	.statfs = simple_statfs,
	396	.delete_inode = spufs_delete_inode,
	397	.drop_inode = generic_delete_inode,
	398	};
	399
	400	sb->s_maxbytes = MAX_LFS_FILESIZE;
	401	sb->s_blocksize = PAGE_CACHE_SIZE;
	402	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	403	sb->s_magic = SPUFS_MAGIC;
	404	sb->s_op = &s_ops;
	405
	406	return spufs_create_root(sb, data);
	407	}
	408
	409	static struct super_block *
	410	spufs_get_sb(struct file_system_type *fstype, int flags,
	411	const char name, void data)
	412	{
	413	return get_sb_single(fstype, flags, data, spufs_fill_super);
	414	}
	415
	416	static struct file_system_type spufs_type = {
	417	.owner = THIS_MODULE,
	418	.name = "spufs",
	419	.get_sb = spufs_get_sb,
	420	.kill_sb = kill_litter_super,
	421	};
	422
	423	static int spufs_init(void)
	424	{
425	int ret;
426	ret = -ENOMEM;
427	spufs_inode_cache = kmem_cache_create("spufs_inode_cache",
428	sizeof(struct spufs_inode_info), 0,
429	SLAB_HWCACHE_ALIGN, spufs_init_once, NULL);
430
431	if (!spufs_inode_cache)
432	goto out;
8b3d6663 AB	433	if (spu_sched_init() != 0) {
	434	kmem_cache_destroy(spufs_inode_cache);
	435	goto out;
	436	}
67207b96 AB	437	ret = register_filesystem(&spufs_type);
	438	if (ret)
	439	goto out_cache;
	440	ret = register_spu_syscalls(&spufs_calls);
	441	if (ret)
	442	goto out_fs;
	443	return 0;
	444	out_fs:
	445	unregister_filesystem(&spufs_type);
	446	out_cache:
	447	kmem_cache_destroy(spufs_inode_cache);
	448	out:
	449	return ret;
	450	}
	451	module_init(spufs_init);
	452
	453	static void spufs_exit(void)
	454	{
8b3d6663	455	spu_sched_exit();
67207b96 AB	456	unregister_spu_syscalls(&spufs_calls);
	457	unregister_filesystem(&spufs_type);
	458	kmem_cache_destroy(spufs_inode_cache);
	459	}
	460	module_exit(spufs_exit);
	461
	462	MODULE_LICENSE("GPL");
	463	MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
	464