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

#include <linux/reiserfs_fs.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/xattr.h>
#include <linux/reiserfs_xattr.h>
#include <asm/uaccess.h>

#define XATTR_SECURITY_PREFIX "security."

static int
security_get(struct inode *inode, const char *name, void *buffer, size_t size)
{
	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
		return -EINVAL;

	if (is_reiserfs_priv_object(inode))
		return -EPERM;

	return reiserfs_xattr_get(inode, name, buffer, size);
}

static int
security_set(struct inode *inode, const char *name, const void *buffer,
	     size_t size, int flags)
{
	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
		return -EINVAL;

	if (is_reiserfs_priv_object(inode))
		return -EPERM;

	return reiserfs_xattr_set(inode, name, buffer, size, flags);
}

static int security_del(struct inode *inode, const char *name)
{
	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
		return -EINVAL;

	if (is_reiserfs_priv_object(inode))
		return -EPERM;

	return 0;
}

static int
security_list(struct inode *inode, const char *name, int namelen, char *out)
{
	int len = namelen;

	if (is_reiserfs_priv_object(inode))
		return 0;

	if (out)
		memcpy(out, name, len);

	return len;
}

struct reiserfs_xattr_handler security_handler = {
	.prefix = XATTR_SECURITY_PREFIX,
	.get = security_get,
	.set = security_set,
	.del = security_del,
	.list = security_list,
};
Commit	Line	Data
1da177e4 LT	1	#include <linux/reiserfs_fs.h>
	2	#include <linux/errno.h>
	3	#include <linux/fs.h>
	4	#include <linux/pagemap.h>
	5	#include <linux/xattr.h>
	6	#include <linux/reiserfs_xattr.h>
	7	#include <asm/uaccess.h>
	8
	9	#define XATTR_SECURITY_PREFIX "security."
	10
	11	static int
bd4c625c	12	security_get(struct inode inode, const char name, void *buffer, size_t size)
1da177e4	13	{
bd4c625c LT	14	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
bd4c625c LT	15	return -EINVAL;
1da177e4	16
bd4c625c LT	17	if (is_reiserfs_priv_object(inode))
bd4c625c LT	18	return -EPERM;
1da177e4	19
bd4c625c	20	return reiserfs_xattr_get(inode, name, buffer, size);
1da177e4 LT	21	}
	22
	23	static int
bd4c625c LT	24	security_set(struct inode inode, const char name, const void *buffer,
bd4c625c LT	25	size_t size, int flags)
1da177e4	26	{
bd4c625c LT	27	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
bd4c625c LT	28	return -EINVAL;
1da177e4	29
bd4c625c LT	30	if (is_reiserfs_priv_object(inode))
bd4c625c LT	31	return -EPERM;
1da177e4	32
bd4c625c	33	return reiserfs_xattr_set(inode, name, buffer, size, flags);
1da177e4 LT	34	}
1da177e4 LT	35
bd4c625c	36	static int security_del(struct inode inode, const char name)
1da177e4	37	{
bd4c625c LT	38	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
bd4c625c LT	39	return -EINVAL;
1da177e4	40
bd4c625c LT	41	if (is_reiserfs_priv_object(inode))
bd4c625c LT	42	return -EPERM;
1da177e4	43
bd4c625c	44	return 0;
1da177e4 LT	45	}
	46
	47	static int
bd4c625c	48	security_list(struct inode inode, const char name, int namelen, char *out)
1da177e4	49	{
bd4c625c	50	int len = namelen;
1da177e4	51
bd4c625c LT	52	if (is_reiserfs_priv_object(inode))
bd4c625c LT	53	return 0;
1da177e4	54
bd4c625c LT	55	if (out)
bd4c625c LT	56	memcpy(out, name, len);
1da177e4	57
bd4c625c	58	return len;
1da177e4 LT	59	}
1da177e4 LT	60
1da177e4 LT	61	struct reiserfs_xattr_handler security_handler = {
	62	.prefix = XATTR_SECURITY_PREFIX,
	63	.get = security_get,
	64	.set = security_set,
	65	.del = security_del,
	66	.list = security_list,
	67	};