forked from luck/tmp_suning_uos_patched
431547b3c4
Add a flags argument to struct xattr_handler and pass it to all xattr handler methods. This allows using the same methods for multiple handlers, e.g. for the ACL methods which perform exactly the same action for the access and default ACLs, just using a different underlying attribute. With a little more groundwork it'll also allow sharing the methods for the regular user/trusted/secure handlers in extN, ocfs2 and jffs2 like it's already done for xfs in this patch. Also change the inode argument to the handlers to a dentry to allow using the handlers mechnism for filesystems that require it later, e.g. cifs. [with GFS2 bits updated by Steven Whitehouse <swhiteho@redhat.com>] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/*
|
|
* JFFS2 -- Journalling Flash File System, Version 2.
|
|
*
|
|
* Copyright © 2006 NEC Corporation
|
|
*
|
|
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
|
|
*
|
|
* For licensing information, see the file 'LICENCE' in this directory.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/time.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/crc32.h>
|
|
#include <linux/jffs2.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/security.h>
|
|
#include "nodelist.h"
|
|
|
|
/* ---- Initial Security Label Attachment -------------- */
|
|
int jffs2_init_security(struct inode *inode, struct inode *dir)
|
|
{
|
|
int rc;
|
|
size_t len;
|
|
void *value;
|
|
char *name;
|
|
|
|
rc = security_inode_init_security(inode, dir, &name, &value, &len);
|
|
if (rc) {
|
|
if (rc == -EOPNOTSUPP)
|
|
return 0;
|
|
return rc;
|
|
}
|
|
rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0);
|
|
|
|
kfree(name);
|
|
kfree(value);
|
|
return rc;
|
|
}
|
|
|
|
/* ---- XATTR Handler for "security.*" ----------------- */
|
|
static int jffs2_security_getxattr(struct dentry *dentry, const char *name,
|
|
void *buffer, size_t size, int type)
|
|
{
|
|
if (!strcmp(name, ""))
|
|
return -EINVAL;
|
|
|
|
return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
|
|
name, buffer, size);
|
|
}
|
|
|
|
static int jffs2_security_setxattr(struct dentry *dentry, const char *name,
|
|
const void *buffer, size_t size, int flags, int type)
|
|
{
|
|
if (!strcmp(name, ""))
|
|
return -EINVAL;
|
|
|
|
return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
|
|
name, buffer, size, flags);
|
|
}
|
|
|
|
static size_t jffs2_security_listxattr(struct dentry *dentry, char *list,
|
|
size_t list_size, const char *name, size_t name_len, int type)
|
|
{
|
|
size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
|
|
|
|
if (list && retlen <= list_size) {
|
|
strcpy(list, XATTR_SECURITY_PREFIX);
|
|
strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
|
|
}
|
|
|
|
return retlen;
|
|
}
|
|
|
|
struct xattr_handler jffs2_security_xattr_handler = {
|
|
.prefix = XATTR_SECURITY_PREFIX,
|
|
.list = jffs2_security_listxattr,
|
|
.set = jffs2_security_setxattr,
|
|
.get = jffs2_security_getxattr
|
|
};
|