* This array holds the first and last local port number.
*/
int sysctl_local_port_range[2] = { 32768, 61000 };
+DEFINE_SEQLOCK(sysctl_port_range_lock);
+
+void inet_get_local_port_range(int *low, int *high)
+{
+ unsigned seq;
+ do {
+ seq = read_seqbegin(&sysctl_port_range_lock);
+
+ *low = sysctl_local_port_range[0];
+ *high = sysctl_local_port_range[1];
+ } while (read_seqretry(&sysctl_port_range_lock, seq));
+}
+EXPORT_SYMBOL(inet_get_local_port_range);
int inet_csk_bind_conflict(const struct sock *sk,
const struct inet_bind_bucket *tb)
local_bh_disable();
if (!snum) {
- int low = sysctl_local_port_range[0];
- int high = sysctl_local_port_range[1];
- int remaining = (high - low) + 1;
- int rover = net_random() % (high - low) + low;
+ int remaining, rover, low, high;
+
+ inet_get_local_port_range(&low, &high);
+ remaining = (high - low) + 1;
+ rover = net_random() % remaining + low;
do {
head = &hashinfo->bhash[inet_bhashfn(rover, hashinfo->bhash_size)];