int newtype,
struct ipv6_opt_hdr __user *newopt,
int newoptlen);
+struct ipv6_txoptions *
+ipv6_renew_options_kern(struct sock *sk,
+ struct ipv6_txoptions *opt,
+ int newtype,
+ struct ipv6_opt_hdr *newopt,
+ int newoptlen);
struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
struct ipv6_txoptions *opt);
return 0;
}
+/**
+ * ipv6_renew_options - replace a specific ext hdr with a new one.
+ *
+ * @sk: sock from which to allocate memory
+ * @opt: original options
+ * @newtype: option type to replace in @opt
+ * @newopt: new option of type @newtype to replace (user-mem)
+ * @newoptlen: length of @newopt
+ *
+ * Returns a new set of options which is a copy of @opt with the
+ * option type @newtype replaced with @newopt.
+ *
+ * @opt may be NULL, in which case a new set of options is returned
+ * containing just @newopt.
+ *
+ * @newopt may be NULL, in which case the specified option type is
+ * not copied into the new set of options.
+ *
+ * The new set of options is allocated from the socket option memory
+ * buffer of @sk.
+ */
struct ipv6_txoptions *
ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
int newtype,
return ERR_PTR(err);
}
+/**
+ * ipv6_renew_options_kern - replace a specific ext hdr with a new one.
+ *
+ * @sk: sock from which to allocate memory
+ * @opt: original options
+ * @newtype: option type to replace in @opt
+ * @newopt: new option of type @newtype to replace (kernel-mem)
+ * @newoptlen: length of @newopt
+ *
+ * See ipv6_renew_options(). The difference is that @newopt is
+ * kernel memory, rather than user memory.
+ */
+struct ipv6_txoptions *
+ipv6_renew_options_kern(struct sock *sk, struct ipv6_txoptions *opt,
+ int newtype, struct ipv6_opt_hdr *newopt,
+ int newoptlen)
+{
+ struct ipv6_txoptions *ret_val;
+ const mm_segment_t old_fs = get_fs();
+
+ set_fs(KERNEL_DS);
+ ret_val = ipv6_renew_options(sk, opt, newtype,
+ (struct ipv6_opt_hdr __user *)newopt,
+ newoptlen);
+ set_fs(old_fs);
+ return ret_val;
+}
+
struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
struct ipv6_txoptions *opt)
{