[linux.git] / fs / efs / super.c

/*
 * super.c
 *
 * Copyright (c) 1999 Al Smith
 *
 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/efs_fs.h>
#include <linux/efs_vh.h>
#include <linux/efs_fs_sb.h>
#include <linux/slab.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>

static int efs_statfs(struct dentry *dentry, struct kstatfs *buf);
static int efs_fill_super(struct super_block *s, void *d, int silent);

static int efs_get_sb(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
	return get_sb_bdev(fs_type, flags, dev_name, data, efs_fill_super, mnt);
}

static struct file_system_type efs_fs_type = {
	.owner		= THIS_MODULE,
	.name		= "efs",
	.get_sb		= efs_get_sb,
	.kill_sb	= kill_block_super,
	.fs_flags	= FS_REQUIRES_DEV,
};

static struct pt_types sgi_pt_types[] = {
	{0x00,		"SGI vh"},
	{0x01,		"SGI trkrepl"},
	{0x02,		"SGI secrepl"},
	{0x03,		"SGI raw"},
	{0x04,		"SGI bsd"},
	{SGI_SYSV,	"SGI sysv"},
	{0x06,		"SGI vol"},
	{SGI_EFS,	"SGI efs"},
	{0x08,		"SGI lv"},
	{0x09,		"SGI rlv"},
	{0x0A,		"SGI xfs"},
	{0x0B,		"SGI xfslog"},
	{0x0C,		"SGI xlv"},
	{0x82,		"Linux swap"},
	{0x83,		"Linux native"},
	{0,		NULL}
};


static struct kmem_cache * efs_inode_cachep;

static struct inode *efs_alloc_inode(struct super_block *sb)
{
	struct efs_inode_info *ei;
	ei = (struct efs_inode_info *)kmem_cache_alloc(efs_inode_cachep, GFP_KERNEL);
	if (!ei)
		return NULL;
	return &ei->vfs_inode;
}

static void efs_destroy_inode(struct inode *inode)
{
	kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
}

static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
{
	struct efs_inode_info *ei = (struct efs_inode_info *) foo;

	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
	    SLAB_CTOR_CONSTRUCTOR)
		inode_init_once(&ei->vfs_inode);
}
 
static int init_inodecache(void)
{
	efs_inode_cachep = kmem_cache_create("efs_inode_cache",
				sizeof(struct efs_inode_info),
				0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
				init_once, NULL);
	if (efs_inode_cachep == NULL)
		return -ENOMEM;
	return 0;
}

static void destroy_inodecache(void)
{
	kmem_cache_destroy(efs_inode_cachep);
}

static void efs_put_super(struct super_block *s)
{
	kfree(s->s_fs_info);
	s->s_fs_info = NULL;
}

static int efs_remount(struct super_block *sb, int *flags, char *data)
{
	*flags |= MS_RDONLY;
	return 0;
}

static struct super_operations efs_superblock_operations = {
	.alloc_inode	= efs_alloc_inode,
	.destroy_inode	= efs_destroy_inode,
	.read_inode	= efs_read_inode,
	.put_super	= efs_put_super,
	.statfs		= efs_statfs,
	.remount_fs	= efs_remount,
};

static struct export_operations efs_export_ops = {
	.get_parent	= efs_get_parent,
};

static int __init init_efs_fs(void) {
	int err;
	printk("EFS: "EFS_VERSION" - http://aeschi.ch.eu.org/efs/\n");
	err = init_inodecache();
	if (err)
		goto out1;
	err = register_filesystem(&efs_fs_type);
	if (err)
		goto out;
	return 0;
out:
	destroy_inodecache();
out1:
	return err;
}

static void __exit exit_efs_fs(void) {
	unregister_filesystem(&efs_fs_type);
	destroy_inodecache();
}

module_init(init_efs_fs)
module_exit(exit_efs_fs)

static efs_block_t efs_validate_vh(struct volume_header *vh) {
	int		i;
	__be32		cs, *ui;
	int		csum;
	efs_block_t	sblock = 0; /* shuts up gcc */
	struct pt_types	*pt_entry;
	int		pt_type, slice = -1;

	if (be32_to_cpu(vh->vh_magic) != VHMAGIC) {
		/*
		 * assume that we're dealing with a partition and allow
		 * read_super() to try and detect a valid superblock
		 * on the next block.
		 */
		return 0;
	}

	ui = ((__be32 *) (vh + 1)) - 1;
	for(csum = 0; ui >= ((__be32 *) vh);) {
		cs = *ui--;
		csum += be32_to_cpu(cs);
	}
	if (csum) {
		printk(KERN_INFO "EFS: SGI disklabel: checksum bad, label corrupted\n");
		return 0;
	}

#ifdef DEBUG
	printk(KERN_DEBUG "EFS: bf: \"%16s\"\n", vh->vh_bootfile);

	for(i = 0; i < NVDIR; i++) {
		int	j;
		char	name[VDNAMESIZE+1];

		for(j = 0; j < VDNAMESIZE; j++) {
			name[j] = vh->vh_vd[i].vd_name[j];
		}
		name[j] = (char) 0;

		if (name[0]) {
			printk(KERN_DEBUG "EFS: vh: %8s block: 0x%08x size: 0x%08x\n",
				name,
				(int) be32_to_cpu(vh->vh_vd[i].vd_lbn),
				(int) be32_to_cpu(vh->vh_vd[i].vd_nbytes));
		}
	}
#endif

	for(i = 0; i < NPARTAB; i++) {
		pt_type = (int) be32_to_cpu(vh->vh_pt[i].pt_type);
		for(pt_entry = sgi_pt_types; pt_entry->pt_name; pt_entry++) {
			if (pt_type == pt_entry->pt_type) break;
		}
#ifdef DEBUG
		if (be32_to_cpu(vh->vh_pt[i].pt_nblks)) {
			printk(KERN_DEBUG "EFS: pt %2d: start: %08d size: %08d type: 0x%02x (%s)\n",
				i,
				(int) be32_to_cpu(vh->vh_pt[i].pt_firstlbn),
				(int) be32_to_cpu(vh->vh_pt[i].pt_nblks),
				pt_type,
				(pt_entry->pt_name) ? pt_entry->pt_name : "unknown");
		}
#endif
		if (IS_EFS(pt_type)) {
			sblock = be32_to_cpu(vh->vh_pt[i].pt_firstlbn);
			slice = i;
		}
	}

	if (slice == -1) {
		printk(KERN_NOTICE "EFS: partition table contained no EFS partitions\n");
#ifdef DEBUG
	} else {
		printk(KERN_INFO "EFS: using slice %d (type %s, offset 0x%x)\n",
			slice,
			(pt_entry->pt_name) ? pt_entry->pt_name : "unknown",
			sblock);
#endif
	}
	return sblock;
}

static int efs_validate_super(struct efs_sb_info *sb, struct efs_super *super) {

	if (!IS_EFS_MAGIC(be32_to_cpu(super->fs_magic)))
		return -1;

	sb->fs_magic     = be32_to_cpu(super->fs_magic);
	sb->total_blocks = be32_to_cpu(super->fs_size);
	sb->first_block  = be32_to_cpu(super->fs_firstcg);
	sb->group_size   = be32_to_cpu(super->fs_cgfsize);
	sb->data_free    = be32_to_cpu(super->fs_tfree);
	sb->inode_free   = be32_to_cpu(super->fs_tinode);
	sb->inode_blocks = be16_to_cpu(super->fs_cgisize);
	sb->total_groups = be16_to_cpu(super->fs_ncg);
    
	return 0;    
}

static int efs_fill_super(struct super_block *s, void *d, int silent)
{
	struct efs_sb_info *sb;
	struct buffer_head *bh;
	struct inode *root;

 	sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
	if (!sb)
		return -ENOMEM;
	s->s_fs_info = sb;
 
	s->s_magic		= EFS_SUPER_MAGIC;
	if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
		printk(KERN_ERR "EFS: device does not support %d byte blocks\n",
			EFS_BLOCKSIZE);
		goto out_no_fs_ul;
	}
  
	/* read the vh (volume header) block */
	bh = sb_bread(s, 0);

	if (!bh) {
		printk(KERN_ERR "EFS: cannot read volume header\n");
		goto out_no_fs_ul;
	}

	/*
	 * if this returns zero then we didn't find any partition table.
	 * this isn't (yet) an error - just assume for the moment that
	 * the device is valid and go on to search for a superblock.
	 */
	sb->fs_start = efs_validate_vh((struct volume_header *) bh->b_data);
	brelse(bh);

	if (sb->fs_start == -1) {
		goto out_no_fs_ul;
	}

	bh = sb_bread(s, sb->fs_start + EFS_SUPER);
	if (!bh) {
		printk(KERN_ERR "EFS: cannot read superblock\n");
		goto out_no_fs_ul;
	}
		
	if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
#ifdef DEBUG
		printk(KERN_WARNING "EFS: invalid superblock at block %u\n", sb->fs_start + EFS_SUPER);
#endif
		brelse(bh);
		goto out_no_fs_ul;
	}
	brelse(bh);

	if (!(s->s_flags & MS_RDONLY)) {
#ifdef DEBUG
		printk(KERN_INFO "EFS: forcing read-only mode\n");
#endif
		s->s_flags |= MS_RDONLY;
	}
	s->s_op   = &efs_superblock_operations;
	s->s_export_op = &efs_export_ops;
	root = iget(s, EFS_ROOTINODE);
	s->s_root = d_alloc_root(root);
 
	if (!(s->s_root)) {
		printk(KERN_ERR "EFS: get root inode failed\n");
		iput(root);
		goto out_no_fs;
	}

	return 0;

out_no_fs_ul:
out_no_fs:
	s->s_fs_info = NULL;
	kfree(sb);
	return -EINVAL;
}

static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {
	struct efs_sb_info *sb = SUPER_INFO(dentry->d_sb);

	buf->f_type    = EFS_SUPER_MAGIC;	/* efs magic number */
	buf->f_bsize   = EFS_BLOCKSIZE;		/* blocksize */
	buf->f_blocks  = sb->total_groups *	/* total data blocks */
			(sb->group_size - sb->inode_blocks);
	buf->f_bfree   = sb->data_free;		/* free data blocks */
	buf->f_bavail  = sb->data_free;		/* free blocks for non-root */
	buf->f_files   = sb->total_groups *	/* total inodes */
			sb->inode_blocks *
			(EFS_BLOCKSIZE / sizeof(struct efs_dinode));
	buf->f_ffree   = sb->inode_free;	/* free inodes */
	buf->f_fsid.val[0] = (sb->fs_magic >> 16) & 0xffff; /* fs ID */
	buf->f_fsid.val[1] =  sb->fs_magic        & 0xffff; /* fs ID */
	buf->f_namelen = EFS_MAXNAMELEN;	/* max filename length */

	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* super.c
	3	*
	4	* Copyright (c) 1999 Al Smith
	5	*
	6	* Portions derived from work (c) 1995,1996 Christian Vogelgsang.
	7	*/
	8
	9	#include <linux/init.h>
	10	#include <linux/module.h>
	11	#include <linux/efs_fs.h>
	12	#include <linux/efs_vh.h>
	13	#include <linux/efs_fs_sb.h>
	14	#include <linux/slab.h>
	15	#include <linux/buffer_head.h>
	16	#include <linux/vfs.h>
	17
726c3342	18	static int efs_statfs(struct dentry dentry, struct kstatfs buf);
1da177e4 LT	19	static int efs_fill_super(struct super_block s, void d, int silent);
1da177e4 LT	20
454e2398 DH	21	static int efs_get_sb(struct file_system_type *fs_type,
454e2398 DH	22	int flags, const char dev_name, void data, struct vfsmount *mnt)
1da177e4	23	{
454e2398	24	return get_sb_bdev(fs_type, flags, dev_name, data, efs_fill_super, mnt);
1da177e4 LT	25	}
	26
	27	static struct file_system_type efs_fs_type = {
	28	.owner = THIS_MODULE,
	29	.name = "efs",
	30	.get_sb = efs_get_sb,
	31	.kill_sb = kill_block_super,
	32	.fs_flags = FS_REQUIRES_DEV,
	33	};
	34
	35	static struct pt_types sgi_pt_types[] = {
	36	{0x00, "SGI vh"},
	37	{0x01, "SGI trkrepl"},
	38	{0x02, "SGI secrepl"},
	39	{0x03, "SGI raw"},
	40	{0x04, "SGI bsd"},
	41	{SGI_SYSV, "SGI sysv"},
	42	{0x06, "SGI vol"},
	43	{SGI_EFS, "SGI efs"},
	44	{0x08, "SGI lv"},
	45	{0x09, "SGI rlv"},
	46	{0x0A, "SGI xfs"},
	47	{0x0B, "SGI xfslog"},
	48	{0x0C, "SGI xlv"},
	49	{0x82, "Linux swap"},
	50	{0x83, "Linux native"},
	51	{0, NULL}
	52	};
	53
	54
e18b890b	55	static struct kmem_cache * efs_inode_cachep;
1da177e4 LT	56
	57	static struct inode efs_alloc_inode(struct super_block sb)
	58	{
	59	struct efs_inode_info *ei;
e94b1766	60	ei = (struct efs_inode_info *)kmem_cache_alloc(efs_inode_cachep, GFP_KERNEL);
1da177e4 LT	61	if (!ei)
	62	return NULL;
	63	return &ei->vfs_inode;
	64	}
	65
	66	static void efs_destroy_inode(struct inode *inode)
	67	{
	68	kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
	69	}
	70
e18b890b	71	static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
1da177e4 LT	72	{
	73	struct efs_inode_info ei = (struct efs_inode_info ) foo;
	74
	75	if ((flags & (SLAB_CTOR_VERIFY\|SLAB_CTOR_CONSTRUCTOR)) ==
	76	SLAB_CTOR_CONSTRUCTOR)
	77	inode_init_once(&ei->vfs_inode);
	78	}
	79
	80	static int init_inodecache(void)
	81	{
	82	efs_inode_cachep = kmem_cache_create("efs_inode_cache",
	83	sizeof(struct efs_inode_info),
4b6a9316	84	0, SLAB_RECLAIM_ACCOUNT\|SLAB_MEM_SPREAD,
1da177e4 LT	85	init_once, NULL);
	86	if (efs_inode_cachep == NULL)
	87	return -ENOMEM;
	88	return 0;
	89	}
	90
	91	static void destroy_inodecache(void)
	92	{
1a1d92c1	93	kmem_cache_destroy(efs_inode_cachep);
1da177e4 LT	94	}
	95
	96	static void efs_put_super(struct super_block *s)
	97	{
	98	kfree(s->s_fs_info);
	99	s->s_fs_info = NULL;
	100	}
	101
	102	static int efs_remount(struct super_block sb, int flags, char *data)
	103	{
	104	*flags \|= MS_RDONLY;
	105	return 0;
	106	}
	107
	108	static struct super_operations efs_superblock_operations = {
	109	.alloc_inode = efs_alloc_inode,
	110	.destroy_inode = efs_destroy_inode,
	111	.read_inode = efs_read_inode,
	112	.put_super = efs_put_super,
	113	.statfs = efs_statfs,
	114	.remount_fs = efs_remount,
	115	};
	116
	117	static struct export_operations efs_export_ops = {
	118	.get_parent = efs_get_parent,
	119	};
	120
	121	static int __init init_efs_fs(void) {
	122	int err;
	123	printk("EFS: "EFS_VERSION" - http://aeschi.ch.eu.org/efs/\n");
	124	err = init_inodecache();
	125	if (err)
	126	goto out1;
	127	err = register_filesystem(&efs_fs_type);
	128	if (err)
	129	goto out;
	130	return 0;
	131	out:
	132	destroy_inodecache();
	133	out1:
	134	return err;
	135	}
	136
	137	static void __exit exit_efs_fs(void) {
	138	unregister_filesystem(&efs_fs_type);
	139	destroy_inodecache();
	140	}
	141
	142	module_init(init_efs_fs)
	143	module_exit(exit_efs_fs)
	144
	145	static efs_block_t efs_validate_vh(struct volume_header *vh) {
	146	int i;
	147	__be32 cs, *ui;
	148	int csum;
	149	efs_block_t sblock = 0; /* shuts up gcc */
	150	struct pt_types *pt_entry;
	151	int pt_type, slice = -1;
	152
	153	if (be32_to_cpu(vh->vh_magic) != VHMAGIC) {
	154	/*
	155	* assume that we're dealing with a partition and allow
	156	* read_super() to try and detect a valid superblock
	157	* on the next block.
158	*/
159	return 0;
160	}
161
162	ui = ((__be32 *) (vh + 1)) - 1;
163	for(csum = 0; ui >= ((__be32 *) vh);) {
164	cs = *ui--;
165	csum += be32_to_cpu(cs);
166	}
167	if (csum) {
168	printk(KERN_INFO "EFS: SGI disklabel: checksum bad, label corrupted\n");
169	return 0;
170	}
171
172	#ifdef DEBUG
173	printk(KERN_DEBUG "EFS: bf: \"%16s\"\n", vh->vh_bootfile);
174
175	for(i = 0; i < NVDIR; i++) {
176	int j;
177	char name[VDNAMESIZE+1];
178
179	for(j = 0; j < VDNAMESIZE; j++) {
180	name[j] = vh->vh_vd[i].vd_name[j];
181	}
182	name[j] = (char) 0;
183
184	if (name[0]) {
185	printk(KERN_DEBUG "EFS: vh: %8s block: 0x%08x size: 0x%08x\n",
186	name,
187	(int) be32_to_cpu(vh->vh_vd[i].vd_lbn),
188	(int) be32_to_cpu(vh->vh_vd[i].vd_nbytes));
189	}
190	}
191	#endif
192
193	for(i = 0; i < NPARTAB; i++) {
194	pt_type = (int) be32_to_cpu(vh->vh_pt[i].pt_type);
195	for(pt_entry = sgi_pt_types; pt_entry->pt_name; pt_entry++) {
196	if (pt_type == pt_entry->pt_type) break;
197	}
198	#ifdef DEBUG
199	if (be32_to_cpu(vh->vh_pt[i].pt_nblks)) {
200	printk(KERN_DEBUG "EFS: pt %2d: start: %08d size: %08d type: 0x%02x (%s)\n",
201	i,
202	(int) be32_to_cpu(vh->vh_pt[i].pt_firstlbn),
203	(int) be32_to_cpu(vh->vh_pt[i].pt_nblks),
204	pt_type,
205	(pt_entry->pt_name) ? pt_entry->pt_name : "unknown");
206	}
207	#endif
208	if (IS_EFS(pt_type)) {
209	sblock = be32_to_cpu(vh->vh_pt[i].pt_firstlbn);
210	slice = i;
211	}
212	}
213
214	if (slice == -1) {
215	printk(KERN_NOTICE "EFS: partition table contained no EFS partitions\n");
216	#ifdef DEBUG
217	} else {
218	printk(KERN_INFO "EFS: using slice %d (type %s, offset 0x%x)\n",
219	slice,
220	(pt_entry->pt_name) ? pt_entry->pt_name : "unknown",
221	sblock);
222	#endif
223	}
014c2544	224	return sblock;
1da177e4 LT	225	}
	226
	227	static int efs_validate_super(struct efs_sb_info sb, struct efs_super super) {
	228
014c2544 JJ	229	if (!IS_EFS_MAGIC(be32_to_cpu(super->fs_magic)))
014c2544 JJ	230	return -1;
1da177e4 LT	231
	232	sb->fs_magic = be32_to_cpu(super->fs_magic);
	233	sb->total_blocks = be32_to_cpu(super->fs_size);
	234	sb->first_block = be32_to_cpu(super->fs_firstcg);
	235	sb->group_size = be32_to_cpu(super->fs_cgfsize);
	236	sb->data_free = be32_to_cpu(super->fs_tfree);
	237	sb->inode_free = be32_to_cpu(super->fs_tinode);
	238	sb->inode_blocks = be16_to_cpu(super->fs_cgisize);
	239	sb->total_groups = be16_to_cpu(super->fs_ncg);
	240
	241	return 0;
	242	}
	243
	244	static int efs_fill_super(struct super_block s, void d, int silent)
	245	{
	246	struct efs_sb_info *sb;
	247	struct buffer_head *bh;
	248	struct inode *root;
	249
f8314dc6	250	sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
1da177e4 LT	251	if (!sb)
	252	return -ENOMEM;
	253	s->s_fs_info = sb;
1da177e4 LT	254
	255	s->s_magic = EFS_SUPER_MAGIC;
	256	if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
	257	printk(KERN_ERR "EFS: device does not support %d byte blocks\n",
	258	EFS_BLOCKSIZE);
	259	goto out_no_fs_ul;
	260	}
	261
	262	/* read the vh (volume header) block */
	263	bh = sb_bread(s, 0);
	264
	265	if (!bh) {
	266	printk(KERN_ERR "EFS: cannot read volume header\n");
	267	goto out_no_fs_ul;
	268	}
	269
	270	/*
	271	* if this returns zero then we didn't find any partition table.
	272	* this isn't (yet) an error - just assume for the moment that
	273	* the device is valid and go on to search for a superblock.
	274	*/
	275	sb->fs_start = efs_validate_vh((struct volume_header *) bh->b_data);
	276	brelse(bh);
	277
	278	if (sb->fs_start == -1) {
	279	goto out_no_fs_ul;
	280	}
	281
	282	bh = sb_bread(s, sb->fs_start + EFS_SUPER);
	283	if (!bh) {
	284	printk(KERN_ERR "EFS: cannot read superblock\n");
	285	goto out_no_fs_ul;
	286	}
	287
	288	if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
	289	#ifdef DEBUG
	290	printk(KERN_WARNING "EFS: invalid superblock at block %u\n", sb->fs_start + EFS_SUPER);
	291	#endif
	292	brelse(bh);
	293	goto out_no_fs_ul;
	294	}
	295	brelse(bh);
	296
	297	if (!(s->s_flags & MS_RDONLY)) {
	298	#ifdef DEBUG
	299	printk(KERN_INFO "EFS: forcing read-only mode\n");
	300	#endif
	301	s->s_flags \|= MS_RDONLY;
	302	}
	303	s->s_op = &efs_superblock_operations;
	304	s->s_export_op = &efs_export_ops;
	305	root = iget(s, EFS_ROOTINODE);
	306	s->s_root = d_alloc_root(root);
	307
	308	if (!(s->s_root)) {
	309	printk(KERN_ERR "EFS: get root inode failed\n");
	310	iput(root);
	311	goto out_no_fs;
	312	}
	313
	314	return 0;
	315
	316	out_no_fs_ul:
	317	out_no_fs:
318	s->s_fs_info = NULL;
319	kfree(sb);
320	return -EINVAL;
321	}
322
726c3342 DH	323	static int efs_statfs(struct dentry dentry, struct kstatfs buf) {
726c3342 DH	324	struct efs_sb_info *sb = SUPER_INFO(dentry->d_sb);
1da177e4 LT	325
	326	buf->f_type = EFS_SUPER_MAGIC; /* efs magic number */
	327	buf->f_bsize = EFS_BLOCKSIZE; /* blocksize */
	328	buf->f_blocks = sb->total_groups * /* total data blocks */
	329	(sb->group_size - sb->inode_blocks);
	330	buf->f_bfree = sb->data_free; /* free data blocks */
	331	buf->f_bavail = sb->data_free; /* free blocks for non-root */
	332	buf->f_files = sb->total_groups * /* total inodes */
	333	sb->inode_blocks *
	334	(EFS_BLOCKSIZE / sizeof(struct efs_dinode));
	335	buf->f_ffree = sb->inode_free; /* free inodes */
	336	buf->f_fsid.val[0] = (sb->fs_magic >> 16) & 0xffff; /* fs ID */
	337	buf->f_fsid.val[1] = sb->fs_magic & 0xffff; /* fs ID */
	338	buf->f_namelen = EFS_MAXNAMELEN; /* max filename length */
	339
	340	return 0;
	341	}
	342