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ocfs2: add security xattr API 

This patch add security xattr set/get/list APIs to
support security attributes in Ocfs2.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Tiger Yang 2008-11-14 11:16:27 +08:00 committed by Mark Fasheh
parent 6c3faba442
commit 923f7f3102
2 changed files with 48 additions and 0 deletions
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47
fs/ocfs2/xattr.c
View File

@ -35,6 +35,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/security.h>
#define MLOG_MASK_PREFIX ML_XATTR #define MLOG_MASK_PREFIX ML_XATTR
#include <cluster/masklog.h> #include <cluster/masklog.h>
@ -88,12 +89,14 @@ static struct ocfs2_xattr_def_value_root def_xv = {
struct xattr_handler *ocfs2_xattr_handlers[] = { struct xattr_handler *ocfs2_xattr_handlers[] = {
&ocfs2_xattr_user_handler, &ocfs2_xattr_user_handler,
&ocfs2_xattr_trusted_handler, &ocfs2_xattr_trusted_handler,
&ocfs2_xattr_security_handler,
NULL NULL
}; };
static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
[OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
[OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
[OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
}; };
struct ocfs2_xattr_info { struct ocfs2_xattr_info {
@ -4976,6 +4979,50 @@ out:
return ret; return ret;
} }
/*
* 'security' attributes support
*/
static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
size_t list_size, const char *name,
size_t name_len)
{
const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
const size_t total_len = prefix_len + name_len + 1;
if (list && total_len <= list_size) {
memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
memcpy(list + prefix_len, name, name_len);
list[prefix_len + name_len] = '\0';
}
return total_len;
}
static int ocfs2_xattr_security_get(struct inode *inode, const char *name,
void *buffer, size_t size)
{
if (strcmp(name, "") == 0)
return -EINVAL;
return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name,
buffer, size);
}
static int ocfs2_xattr_security_set(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
if (strcmp(name, "") == 0)
return -EINVAL;
return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value,
size, flags);
}
struct xattr_handler ocfs2_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.list = ocfs2_xattr_security_list,
.get = ocfs2_xattr_security_get,
.set = ocfs2_xattr_security_set,
};
/* /*
* 'trusted' attributes support * 'trusted' attributes support
*/ */

1
fs/ocfs2/xattr.h
View File

@ -32,6 +32,7 @@ enum ocfs2_xattr_type {
extern struct xattr_handler ocfs2_xattr_user_handler; extern struct xattr_handler ocfs2_xattr_user_handler;
extern struct xattr_handler ocfs2_xattr_trusted_handler; extern struct xattr_handler ocfs2_xattr_trusted_handler;
extern struct xattr_handler ocfs2_xattr_security_handler;
extern struct xattr_handler *ocfs2_xattr_handlers[]; extern struct xattr_handler *ocfs2_xattr_handlers[];
ssize_t ocfs2_listxattr(struct dentry *, char *, size_t); ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);