https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 2c53b436a30867eb6b47dd7bab23ba638d1fb0d2 authored by Linus Torvalds on 13 June 2011, 22:29:59 UTC
Linux 3.0-rc3
Linux 3.0-rc3
Tip revision: 2c53b43
xattr_security.c
/*
* linux/fs/ext3/xattr_security.c
* Handler for storing security labels as extended attributes.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/ext3_jbd.h>
#include <linux/ext3_fs.h>
#include <linux/security.h>
#include "xattr.h"
static size_t
ext3_xattr_security_list(struct dentry *dentry, char *list, size_t list_size,
const char *name, size_t name_len, int type)
{
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
ext3_xattr_security_get(struct dentry *dentry, const char *name,
void *buffer, size_t size, int type)
{
if (strcmp(name, "") == 0)
return -EINVAL;
return ext3_xattr_get(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
name, buffer, size);
}
static int
ext3_xattr_security_set(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags, int type)
{
if (strcmp(name, "") == 0)
return -EINVAL;
return ext3_xattr_set(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
name, value, size, flags);
}
int
ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
const struct qstr *qstr)
{
int err;
size_t len;
void *value;
char *name;
err = security_inode_init_security(inode, dir, qstr, &name, &value, &len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY,
name, value, len, 0);
kfree(name);
kfree(value);
return err;
}
const struct xattr_handler ext3_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.list = ext3_xattr_security_list,
.get = ext3_xattr_security_get,
.set = ext3_xattr_security_set,
};