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88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/*
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* dmfs-super.c
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*
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* Copyright (C) 2001 Sistina Software
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*
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* This software is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2, or (at
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* your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <linux/config.h>
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#include <linux/fs.h>
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#define DMFS_MAGIC 0x444D4653
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extern struct inode *dmfs_create_root(struct super_block *sb, int);
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static int dmfs_statfs(struct super_block *sb, struct statfs *buf)
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{
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buf->f_type = sb->s_magic;
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buf->f_bsize = sb->s_blocksize;
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buf->f_namelen = DM_NAME_LEN - 1;
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return 0;
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}
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static void dmfs_delete_inode(struct inode *inode)
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{
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struct super_block *sb = inode->i_sb;
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struct dmfs_i *dmi = DMFS_I(inode);
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if (dmi) {
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if (dmi->md)
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dm_remove(dmi->md);
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if (dmi->table)
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dm_put_table(dmi->table):
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if (dmi->dentry)
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dm_unlock_tdir(dmi->dentry);
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kfree(dmi);
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}
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inode->u.generic_ip = NULL;
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clear_inode(inode);
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}
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static struct super_operations dmfs_super_operations = {
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statfs: dmfs_statfs,
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put_inode: force_delete,
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delete_inode: dmfs_delete_inode,
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};
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struct super_block *dmfs_read_super(struct super_block *sb, void *data, int silent)
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{
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struct inode *inode;
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struct dentry *root;
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sb->s_blocksize = PAGE_CACHE_SIZE;
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sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
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sb->s_magic = DMFS_MAGIC;
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sb->s_ops = &dmfs_super_operations;
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sb->s_maxbytes = MAX_NON_LFS;
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inode = dmfs_create_root(sb, 0755);
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if (IS_ERR(inode))
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return NULL;
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root = d_alloc_root(inode);
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if (!root) {
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iput(inode);
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return NULL;
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}
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sb->s_root = root;
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return sb;
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}
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