156 lines
4.2 KiB
C
156 lines
4.2 KiB
C
/*
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* security/tomoyo/common.c
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*
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* Securityfs interface for TOMOYO.
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*
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* Copyright (C) 2005-2010 NTT DATA CORPORATION
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*/
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#include <linux/security.h>
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#include "common.h"
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/**
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* tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface.
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*
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* @inode: Pointer to "struct inode".
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* @file: Pointer to "struct file".
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*
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* Returns 0 on success, negative value otherwise.
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*/
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static int tomoyo_open(struct inode *inode, struct file *file)
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{
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const int key = ((u8 *) file->f_path.dentry->d_inode->i_private)
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- ((u8 *) NULL);
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return tomoyo_open_control(key, file);
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}
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/**
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* tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface.
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*
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* @inode: Pointer to "struct inode".
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* @file: Pointer to "struct file".
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*
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* Returns 0 on success, negative value otherwise.
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*/
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static int tomoyo_release(struct inode *inode, struct file *file)
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{
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return tomoyo_close_control(file);
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}
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/**
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* tomoyo_poll - poll() for /proc/ccs/ interface.
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*
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* @file: Pointer to "struct file".
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* @wait: Pointer to "poll_table".
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*
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* Returns 0 on success, negative value otherwise.
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*/
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static unsigned int tomoyo_poll(struct file *file, poll_table *wait)
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{
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return tomoyo_poll_control(file, wait);
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}
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/**
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* tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface.
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*
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* @file: Pointer to "struct file".
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* @buf: Pointer to buffer.
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* @count: Size of @buf.
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* @ppos: Unused.
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*
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* Returns bytes read on success, negative value otherwise.
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*/
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static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count,
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loff_t *ppos)
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{
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return tomoyo_read_control(file, buf, count);
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}
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/**
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* tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface.
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*
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* @file: Pointer to "struct file".
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* @buf: Pointer to buffer.
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* @count: Size of @buf.
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* @ppos: Unused.
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*
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* Returns @count on success, negative value otherwise.
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*/
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static ssize_t tomoyo_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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return tomoyo_write_control(file, buf, count);
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}
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/*
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* tomoyo_operations is a "struct file_operations" which is used for handling
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* /sys/kernel/security/tomoyo/ interface.
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*
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* Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR).
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* See tomoyo_io_buffer for internals.
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*/
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static const struct file_operations tomoyo_operations = {
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.open = tomoyo_open,
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.release = tomoyo_release,
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.poll = tomoyo_poll,
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.read = tomoyo_read,
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.write = tomoyo_write,
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.llseek = noop_llseek,
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};
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/**
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* tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory.
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*
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* @name: The name of the interface file.
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* @mode: The permission of the interface file.
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* @parent: The parent directory.
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* @key: Type of interface.
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*
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* Returns nothing.
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*/
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static void __init tomoyo_create_entry(const char *name, const mode_t mode,
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struct dentry *parent, const u8 key)
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{
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securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
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&tomoyo_operations);
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}
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/**
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* tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
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*
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* Returns 0.
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*/
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static int __init tomoyo_initerface_init(void)
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{
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struct dentry *tomoyo_dir;
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/* Don't create securityfs entries unless registered. */
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if (current_cred()->security != &tomoyo_kernel_domain)
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return 0;
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tomoyo_dir = securityfs_create_dir("tomoyo", NULL);
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tomoyo_create_entry("query", 0600, tomoyo_dir,
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TOMOYO_QUERY);
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tomoyo_create_entry("domain_policy", 0600, tomoyo_dir,
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TOMOYO_DOMAINPOLICY);
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tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
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TOMOYO_EXCEPTIONPOLICY);
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tomoyo_create_entry("self_domain", 0400, tomoyo_dir,
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TOMOYO_SELFDOMAIN);
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tomoyo_create_entry(".domain_status", 0600, tomoyo_dir,
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TOMOYO_DOMAIN_STATUS);
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tomoyo_create_entry(".process_status", 0600, tomoyo_dir,
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TOMOYO_PROCESS_STATUS);
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tomoyo_create_entry("meminfo", 0600, tomoyo_dir,
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TOMOYO_MEMINFO);
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tomoyo_create_entry("profile", 0600, tomoyo_dir,
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TOMOYO_PROFILE);
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tomoyo_create_entry("manager", 0600, tomoyo_dir,
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TOMOYO_MANAGER);
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tomoyo_create_entry("version", 0400, tomoyo_dir,
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TOMOYO_VERSION);
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return 0;
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}
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fs_initcall(tomoyo_initerface_init);
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