sk-inet: handle the IP_FREEBIND option (v2)

v2: set has_freebind
Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

protobuf/sk-inet.proto

@@ -2,6 +2,10 @@ import "opts.proto";
 import "fown.proto";
 import "sk-opts.proto";
 
+message ip_opts_entry {
+	optional bool		freebind	= 1;
+}
+
 message inet_sk_entry {
 	/*
 	 * We have two IDs here -- id and ino. The first one
@@ -28,4 +32,5 @@ message inet_sk_entry {
 	required fown_entry		fown		= 13;
 	required sk_opts_entry		opts		= 14;
 	optional bool			v6only		= 15;
+	optional ip_opts_entry		ip_opts		= 16;
 }

sk-inet.c

@@ -230,10 +230,20 @@ err:
 	return NULL;
 }
 
+static int dump_ip_opts(int sk, IpOptsEntry *ioe)
+{
+	int ret = 0;
+
+	ret |= dump_opt(sk, SOL_IP, IP_FREEBIND, &ioe->freebind);
+	ioe->has_freebind = ioe->freebind;
+
+	return ret;
+}
 static int do_dump_one_inet_fd(int lfd, u32 id, const struct fd_parms *p, int family)
 {
 	struct inet_sk_desc *sk;
 	InetSkEntry ie = INET_SK_ENTRY__INIT;
+	IpOptsEntry ipopts = IP_OPTS_ENTRY__INIT;
 	SkOptsEntry skopts = SK_OPTS_ENTRY__INIT;
 	int ret = -1, err = -1, proto;
 
@@ -272,6 +282,7 @@ static int do_dump_one_inet_fd(int lfd, u32 id, const struct fd_parms *p, int fa
 
 	ie.fown		= (FownEntry *)&p->fown;
 	ie.opts		= &skopts;
+	ie.ip_opts	= &ipopts;
 
 	ie.n_src_addr = PB_ALEN_INET;
 	ie.n_dst_addr = PB_ALEN_INET;
@@ -298,6 +309,9 @@ static int do_dump_one_inet_fd(int lfd, u32 id, const struct fd_parms *p, int fa
 	memcpy(ie.src_addr, sk->src_addr, pb_repeated_size(&ie, src_addr));
 	memcpy(ie.dst_addr, sk->dst_addr, pb_repeated_size(&ie, dst_addr));
 
+	if (dump_ip_opts(lfd, &ipopts))
+		goto err;
+
 	if (dump_socket_opts(lfd, &skopts))
 		goto err;
 
@@ -477,6 +491,15 @@ static int post_open_inet_sk(struct file_desc *d, int sk)
 	return 0;
 }
 
+int restore_ip_opts(int sk, IpOptsEntry *ioe)
+{
+	int ret = 0;
+
+	if (ioe->has_freebind)
+		ret |= restore_opt(sk, SOL_IP, IP_FREEBIND, &ioe->freebind);
+
+	return ret;
+}
 static int open_inet_sk(struct file_desc *d)
 {
 	struct inet_sk_info *ii;
@@ -565,6 +588,9 @@ done:
 	if (rst_file_params(sk, ie->fown, ie->flags))
 		goto err;
 
+	if (ie->ip_opts && restore_ip_opts(sk, ie->ip_opts))
+		goto err;
+
 	if (restore_socket_opts(sk, ie->opts))
 		goto err;