[deliverable/linux.git] / fs / hfsplus / xattr_security.c

/*
 * linux/fs/hfsplus/xattr_trusted.c
 *
 * Vyacheslav Dubeyko <slava@dubeyko.com>
 *
 * Handler for storing security labels as extended attributes.
 */

#include <linux/security.h>
#include <linux/nls.h>

#include "hfsplus_fs.h"
#include "xattr.h"
#include "acl.h"

static int hfsplus_security_getxattr(struct dentry *dentry, const char *name,
					void *buffer, size_t size, int type)
{
	char *xattr_name;
	int res;

	if (!strcmp(name, ""))
		return -EINVAL;

	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
		GFP_KERNEL);
	if (!xattr_name)
		return -ENOMEM;
	strcpy(xattr_name, XATTR_SECURITY_PREFIX);
	strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name);

	res = hfsplus_getxattr(dentry, xattr_name, buffer, size);
	kfree(xattr_name);
	return res;
}

static int hfsplus_security_setxattr(struct dentry *dentry, const char *name,
		const void *buffer, size_t size, int flags, int type)
{
	char *xattr_name;
	int res;

	if (!strcmp(name, ""))
		return -EINVAL;

	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
		GFP_KERNEL);
	if (!xattr_name)
		return -ENOMEM;
	strcpy(xattr_name, XATTR_SECURITY_PREFIX);
	strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name);

	res = hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
	kfree(xattr_name);
	return res;
}

static size_t hfsplus_security_listxattr(struct dentry *dentry, char *list,
		size_t list_size, const char *name, size_t name_len, int type)
{
	/*
	 * This method is not used.
	 * It is used hfsplus_listxattr() instead of generic_listxattr().
	 */
	return -EOPNOTSUPP;
}

static int hfsplus_initxattrs(struct inode *inode,
				const struct xattr *xattr_array,
				void *fs_info)
{
	const struct xattr *xattr;
	char *xattr_name;
	int err = 0;

	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
		GFP_KERNEL);
	if (!xattr_name)
		return -ENOMEM;
	for (xattr = xattr_array; xattr->name != NULL; xattr++) {

		if (!strcmp(xattr->name, ""))
			continue;

		strcpy(xattr_name, XATTR_SECURITY_PREFIX);
		strcpy(xattr_name +
			XATTR_SECURITY_PREFIX_LEN, xattr->name);
		memset(xattr_name +
			XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);

		err = __hfsplus_setxattr(inode, xattr_name,
					xattr->value, xattr->value_len, 0);
		if (err)
			break;
	}
	kfree(xattr_name);
	return err;
}

int hfsplus_init_security(struct inode *inode, struct inode *dir,
				const struct qstr *qstr)
{
	return security_inode_init_security(inode, dir, qstr,
					&hfsplus_initxattrs, NULL);
}

int hfsplus_init_inode_security(struct inode *inode,
						struct inode *dir,
						const struct qstr *qstr)
{
	int err;

	err = hfsplus_init_posix_acl(inode, dir);
	if (!err)
		err = hfsplus_init_security(inode, dir, qstr);
	return err;
}

const struct xattr_handler hfsplus_xattr_security_handler = {
	.prefix	= XATTR_SECURITY_PREFIX,
	.list	= hfsplus_security_listxattr,
	.get	= hfsplus_security_getxattr,
	.set	= hfsplus_security_setxattr,
};
Commit	Line	Data
127e5f5a VD	1	/*
	2	* linux/fs/hfsplus/xattr_trusted.c
	3	*
	4	* Vyacheslav Dubeyko <slava@dubeyko.com>
	5	*
	6	* Handler for storing security labels as extended attributes.
	7	*/
	8
	9	#include <linux/security.h>
bf29e886 HTL	10	#include <linux/nls.h>
bf29e886 HTL	11
127e5f5a VD	12	#include "hfsplus_fs.h"
127e5f5a VD	13	#include "xattr.h"
b4c1107c	14	#include "acl.h"
127e5f5a VD	15
	16	static int hfsplus_security_getxattr(struct dentry dentry, const char name,
	17	void *buffer, size_t size, int type)
	18	{
bf29e886 HTL	19	char *xattr_name;
bf29e886 HTL	20	int res;
127e5f5a VD	21
	22	if (!strcmp(name, ""))
	23	return -EINVAL;
	24
bf29e886 HTL	25	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
	26	GFP_KERNEL);
	27	if (!xattr_name)
	28	return -ENOMEM;
127e5f5a VD	29	strcpy(xattr_name, XATTR_SECURITY_PREFIX);
	30	strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name);
	31
bf29e886 HTL	32	res = hfsplus_getxattr(dentry, xattr_name, buffer, size);
	33	kfree(xattr_name);
	34	return res;
127e5f5a VD	35	}
	36
	37	static int hfsplus_security_setxattr(struct dentry dentry, const char name,
	38	const void *buffer, size_t size, int flags, int type)
	39	{
bf29e886 HTL	40	char *xattr_name;
bf29e886 HTL	41	int res;
127e5f5a VD	42
	43	if (!strcmp(name, ""))
	44	return -EINVAL;
	45
bf29e886 HTL	46	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
	47	GFP_KERNEL);
	48	if (!xattr_name)
	49	return -ENOMEM;
127e5f5a VD	50	strcpy(xattr_name, XATTR_SECURITY_PREFIX);
	51	strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name);
	52
bf29e886 HTL	53	res = hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
	54	kfree(xattr_name);
	55	return res;
127e5f5a VD	56	}
	57
	58	static size_t hfsplus_security_listxattr(struct dentry dentry, char list,
	59	size_t list_size, const char *name, size_t name_len, int type)
	60	{
	61	/*
	62	* This method is not used.
	63	* It is used hfsplus_listxattr() instead of generic_listxattr().
	64	*/
	65	return -EOPNOTSUPP;
	66	}
	67
	68	static int hfsplus_initxattrs(struct inode *inode,
	69	const struct xattr *xattr_array,
	70	void *fs_info)
	71	{
	72	const struct xattr *xattr;
bf29e886	73	char *xattr_name;
127e5f5a VD	74	int err = 0;
127e5f5a VD	75
bf29e886 HTL	76	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
	77	GFP_KERNEL);
	78	if (!xattr_name)
	79	return -ENOMEM;
127e5f5a	80	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
127e5f5a	81
bf29e886	82	if (!strcmp(xattr->name, ""))
127e5f5a VD	83	continue;
127e5f5a VD	84
127e5f5a VD	85	strcpy(xattr_name, XATTR_SECURITY_PREFIX);
	86	strcpy(xattr_name +
	87	XATTR_SECURITY_PREFIX_LEN, xattr->name);
	88	memset(xattr_name +
bf29e886	89	XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
127e5f5a VD	90
	91	err = __hfsplus_setxattr(inode, xattr_name,
	92	xattr->value, xattr->value_len, 0);
	93	if (err)
	94	break;
	95	}
bf29e886	96	kfree(xattr_name);
127e5f5a VD	97	return err;
	98	}
	99
	100	int hfsplus_init_security(struct inode inode, struct inode dir,
	101	const struct qstr *qstr)
	102	{
	103	return security_inode_init_security(inode, dir, qstr,
	104	&hfsplus_initxattrs, NULL);
	105	}
	106
b4c1107c VD	107	int hfsplus_init_inode_security(struct inode *inode,
	108	struct inode *dir,
	109	const struct qstr *qstr)
	110	{
	111	int err;
	112
	113	err = hfsplus_init_posix_acl(inode, dir);
	114	if (!err)
	115	err = hfsplus_init_security(inode, dir, qstr);
	116	return err;
	117	}
	118
127e5f5a VD	119	const struct xattr_handler hfsplus_xattr_security_handler = {
	120	.prefix = XATTR_SECURITY_PREFIX,
	121	.list = hfsplus_security_listxattr,
	122	.get = hfsplus_security_getxattr,
	123	.set = hfsplus_security_setxattr,
	124	};