1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/errno.h>
5 #include <linux/pagemap.h>
6 #include <linux/xattr.h>
7 #include <linux/slab.h>
9 #include <linux/security.h>
10 #include <linux/uaccess.h>
13 security_get(const struct xattr_handler
*handler
, struct dentry
*unused
,
14 struct inode
*inode
, const char *name
, void *buffer
, size_t size
)
16 if (IS_PRIVATE(inode
))
19 return reiserfs_xattr_get(inode
, xattr_full_name(handler
, name
),
24 security_set(const struct xattr_handler
*handler
,
25 struct user_namespace
*mnt_userns
, struct dentry
*unused
,
26 struct inode
*inode
, const char *name
, const void *buffer
,
27 size_t size
, int flags
)
29 if (IS_PRIVATE(inode
))
32 return reiserfs_xattr_set(inode
,
33 xattr_full_name(handler
, name
),
37 static bool security_list(struct dentry
*dentry
)
39 return !IS_PRIVATE(d_inode(dentry
));
42 /* Initializes the security context for a new inode and returns the number
43 * of blocks needed for the transaction. If successful, reiserfs_security
44 * must be released using reiserfs_security_free when the caller is done. */
45 int reiserfs_security_init(struct inode
*dir
, struct inode
*inode
,
46 const struct qstr
*qstr
,
47 struct reiserfs_security_handle
*sec
)
54 /* Don't add selinux attributes on xattrs - they'll never get used */
58 error
= security_old_inode_init_security(inode
, dir
, qstr
, &sec
->name
,
59 &sec
->value
, &sec
->length
);
61 if (error
== -EOPNOTSUPP
)
70 if (sec
->length
&& reiserfs_xattrs_initialized(inode
->i_sb
)) {
71 blocks
= reiserfs_xattr_jcreate_nblocks(inode
) +
72 reiserfs_xattr_nblocks(inode
, sec
->length
);
73 /* We don't want to count the directories twice if we have
75 REISERFS_I(inode
)->i_flags
|= i_has_xattr_dir
;
80 int reiserfs_security_write(struct reiserfs_transaction_handle
*th
,
82 struct reiserfs_security_handle
*sec
)
85 if (strlen(sec
->name
) < sizeof(XATTR_SECURITY_PREFIX
))
88 error
= reiserfs_xattr_set_handle(th
, inode
, sec
->name
, sec
->value
,
89 sec
->length
, XATTR_CREATE
);
90 if (error
== -ENODATA
|| error
== -EOPNOTSUPP
)
96 void reiserfs_security_free(struct reiserfs_security_handle
*sec
)
104 const struct xattr_handler reiserfs_xattr_security_handler
= {
105 .prefix
= XATTR_SECURITY_PREFIX
,
108 .list
= security_list
,