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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/fs/ext4/xattr_security.c
3 * Handler for storing security labels as extended attributes.
4 */
5
6#include <linux/string.h>
7#include <linux/fs.h>
8#include <linux/security.h>
9#include <linux/slab.h>
10#include "ext4_jbd2.h"
11#include "ext4.h"
12#include "xattr.h"
13
14static int
15ext4_xattr_security_get(const struct xattr_handler *handler,
16 struct dentry *dentry, const char *name,
17 void *buffer, size_t size)
18{
19 return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_SECURITY,
20 name, buffer, size);
21}
22
23static int
24ext4_xattr_security_set(const struct xattr_handler *handler,
25 struct dentry *dentry, const char *name,
26 const void *value, size_t size, int flags)
27{
28 return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_SECURITY,
29 name, value, size, flags);
30}
31
32static int
33ext4_initxattrs(struct inode *inode, const struct xattr *xattr_array,
34 void *fs_info)
35{
36 const struct xattr *xattr;
37 handle_t *handle = fs_info;
38 int err = 0;
39
40 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
41 err = ext4_xattr_set_handle(handle, inode,
42 EXT4_XATTR_INDEX_SECURITY,
43 xattr->name, xattr->value,
44 xattr->value_len, 0);
45 if (err < 0)
46 break;
47 }
48 return err;
49}
50
51int
52ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
53 const struct qstr *qstr)
54{
55 return security_inode_init_security(inode, dir, qstr,
56 &ext4_initxattrs, handle);
57}
58
59const struct xattr_handler ext4_xattr_security_handler = {
60 .prefix = XATTR_SECURITY_PREFIX,
61 .get = ext4_xattr_security_get,
62 .set = ext4_xattr_security_set,
63};