/**
* Get security context xattr name used by policy.
*
* \retval >= 0 length of xattr name
* \retval < 0 failure to get security context xattr name
*/
int
ll_listsecurity(struct inode *inode, char *secctx_name, size_t secctx_name_size)
{
int rc;
if (!selinux_is_enabled())
return 0;
#ifdef HAVE_SECURITY_INODE_LISTSECURITY
rc = security_inode_listsecurity(inode, secctx_name, secctx_name_size);
if (rc >= secctx_name_size)
rc = -ERANGE;
else if (rc >= 0)
secctx_name[rc] = '\0';
return rc;
#else /* !HAVE_SECURITY_INODE_LISTSECURITY */
rc = sizeof(XATTR_NAME_SELINUX);
if (secctx_name && rc < secctx_name_size) {
memcpy(secctx_name, XATTR_NAME_SELINUX, rc);
secctx_name[rc] = '\0';
} else {
rc = -ERANGE;
}
return rc;
#endif /* HAVE_SECURITY_INODE_LISTSECURITY */
}
ssize_t
vfs_listxattr(struct dentry *d, char *list, size_t size)
{
ssize_t error;
error = security_inode_listxattr(d);
if (error)
return error;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->listxattr) {
error = d->d_inode->i_op->listxattr(d, list, size);
} else {
error = security_inode_listsecurity(d->d_inode, list, size);
if (size && error > size)
error = -ERANGE;
}
return error;
}
