[linux-2.6-block.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 "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[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0};
	size_t len = strlen(name);

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

	if (len + XATTR_SECURITY_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
		return -EOPNOTSUPP;

	strcpy(xattr_name, XATTR_SECURITY_PREFIX);
	strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name);

	return hfsplus_getxattr(dentry, xattr_name, buffer, size);
}

static int hfsplus_security_setxattr(struct dentry *dentry, const char *name,
		const void *buffer, size_t size, int flags, int type)
{
	char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0};
	size_t len = strlen(name);

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

	if (len + XATTR_SECURITY_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
		return -EOPNOTSUPP;

	strcpy(xattr_name, XATTR_SECURITY_PREFIX);
	strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name);

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

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[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0};
	size_t xattr_name_len;
	int err = 0;

	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
		xattr_name_len = strlen(xattr->name);

		if (xattr_name_len == 0)
			continue;

		if (xattr_name_len + XATTR_SECURITY_PREFIX_LEN >
				HFSPLUS_ATTR_MAX_STRLEN)
			return -EOPNOTSUPP;

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

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