linuxconsole-commit

[James S. <jsi...@us...>]

Update of /cvsroot/linuxconsole/ruby/linux/fs/inputfs
In directory usw-pr-cvs1:/tmp/cvs-serv23749

Added Files:
	Makefile dir.c file.c inode.c super.c 
Log Message:
Skeleton to new input filesystem.

--- NEW FILE: Makefile ---
#
# Makefile for the Linux input filesystem routines.
#
# Note! Dependencies are done automagically by 'make dep', which also
# removes any old dependencies. DON'T put your own dependencies here
# unless it's something special (not a .c file).
#
# Note 2! The CFLAGS definitions are now in the main makefile.

O_TARGET := inputfs.o

obj-y := super.o inode.o file.o dir.o
obj-m := $(O_TARGET)

include $(TOPDIR)/Rules.make


--- NEW FILE: dir.c ---
/*
 * fs/inputfs/dir.c
 *
 * inputfs directory operations
 *
 * Copyright (C) 2001 James Simmons <jsi...@tr...>
 *
 * Released under the terms of the GNU GPL v2.0.
 *
 */
#include <linux/inputfs_fs.h>
#include <linux/dcache.h>

/* FIXME: Keep things happy for now, add our own later */
struct file_operations inputfs_dir_ops = {
	read:		generic_read_dir,
	readdir:	dcache_readdir,
};

/* Ditto */
struct inode_operations inputfs_dir_inode_ops = {
	/* Empty for now */
};


--- NEW FILE: file.c ---
/*
 * fs/inputfs/file.c
 *
 * inputfs file operations
 *
 * Copyright (C) 2001 James Simmons <jsi...@tr...>
 *
 * Released under the terms of the GNU GPL v2.0.
 *
 */
#include <linux/inputfs_fs.h>

/*
 * FIXME: Use generic routines for now, add our own later.
 */
struct file_operations inputfs_file_ops = {
	mmap:		generic_file_mmap,
	llseek:		generic_file_llseek,
};


--- NEW FILE: inode.c ---
/*
 * fs/inputfs/inode.c
 *
 * inputfs inode operations
 *
 * Copyright (C) 2001 James Simmons <jsi...@tr...>
 *
 * Released under the terms of the GNU GPL v2.0.
 *
 */
#include <linux/locks.h>
#include <linux/inputfs_fs.h>
#include <asm/uaccess.h>

void inputfs_read_inode(struct inode *inode)
{
	inode->i_atime = inode->i_ctime = inode->i_mtime = CURRENT_TIME;
}

struct inode *inputfs_get_inode(struct super_block *sb, int mode, int dev)
{
	struct inode *inode = new_inode(sb);

	if (!inode) {
		printk(KERN_WARNING "inputfs: Unable to get new inode\n");
		return NULL;
	}

	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_rdev    = NODEV;
	
	inputfs_read_inode(inode);

	switch (mode & S_IFMT) {
		case S_IFREG:
			inode->i_fop = &inputfs_file_ops;
			break;
		case S_IFDIR:
			inode->i_op = &inputfs_dir_inode_ops;
			inode->i_fop = &inputfs_dir_ops;
			break;
		default:
			init_special_inode(inode, mode, dev);
			break;
	}

	return inode;
}


--- NEW FILE: super.c ---
/*
 * fs/inputfs/super.c
 *
 * inputfs superblock operations
 *
 * Copyright (C) 2001 James Simmons <jsi...@tr...>
 *
 * Released under the terms of the GNU GPL v2.0.
 *
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/inputfs_fs.h>
#include <linux/pagemap.h>
#include <linux/dcache.h>

static struct vfsmount *inputfs_mnt;

static int inputfs_statfs(struct super_block *sb, struct statfs *buf)
{
	buf->f_type    = INPUTFS_SUPER_MAGIC;
	buf->f_bsize   = PAGE_CACHE_SIZE;
	buf->f_namelen = NAME_MAX;

	return 0;
}

static struct super_operations inputfs_super_ops = {
	statfs:		inputfs_statfs,
};

static struct super_block *inputfs_read_super(struct super_block *sb,
					    void *data, int silent)
{
	struct inode *root_inode;

	sb->s_blocksize      = PAGE_CACHE_SIZE;
	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	sb->s_magic          = INPUTFS_SUPER_MAGIC;
	sb->s_op             = &inputfs_super_ops;

	root_inode = inputfs_get_inode(sb, S_IFDIR | 0755, 0);

	if (!root_inode) {
		printk(KERN_WARNING "inputfs: Unable to get root inode\n");
		return NULL;
	}

	sb->s_root = d_alloc_root(root_inode);

	if (!sb->s_root) {
		printk(KERN_WARNING "inputfs: Unable to get root dentry\n");
		iput(root_inode);
		return NULL;
	}

	return sb;
}

static DECLARE_FSTYPE(inputfs_fs_type, "inputfs", inputfs_read_super, FS_SINGLE);

static int __init init_inputfs_fs(void)
{
	int ret = register_filesystem(&inputfs_fs_type);

	if (!ret) {
		inputfs_mnt = kern_mount(&inputfs_fs_type);
		ret = PTR_ERR(inputfs_mnt);

		if (!IS_ERR(inputfs_mnt)) {
			ret = 0;
		}
	}

	return ret;
}

static void __exit exit_inputfs_fs(void)
{
	kern_umount(inputfs_mnt);
	unregister_filesystem(&inputfs_fs_type);
}

EXPORT_NO_SYMBOLS;

MODULE_AUTHOR("James Simmons <jsi...@tr...>");
MODULE_DESCRIPTION("input file system");
MODULE_LICENSE("GPL");

module_init(init_inputfs_fs);
module_exit(exit_inputfs_fs);