/* A socket is created, we know its type - check if we should set a
* new stackname, and do so.
*/
static int apply_extname(int socket_type)
{
char name[MAX_EXTNAME_LEN];
int ok;
/* Need to have loaded the config from disk */
ensure_config_loaded();
LOG("apply_extname(%d) tid=%d", socket_type, (int)pthread_self());
/* Find the name for this thread */
ok = get_extname_for_thread(pthread_self(), name);
LOG("get_extname_for_thread returned %d %s", ok, name);
if( ok >= 0 ) {
/* Store the current name, so we can restore it later */
ok = onload_stackname_save();
/* Adjust the name to account for socket type */
alter_name_for_socket(socket_type, name);
/* Adjust the name to account for CPU */
alter_name_for_cpu(name);
/* Check for 'do not accelerate' name, then set appropriate name */
if( !strncasecmp("_", name, 2) )
ok = onload_set_stackname(ONLOAD_THIS_THREAD, ONLOAD_SCOPE_GLOBAL,
ONLOAD_DONT_ACCELERATE);
else
ok = onload_set_stackname(ONLOAD_THIS_THREAD, ONLOAD_SCOPE_GLOBAL,
name);
LOG("onload_set_stackname(\"%s\"): %d (%d)", name, ok, errno);
}
return ok;
}
int main(void)
{
int s1;
int s2;
int r;
struct onload_stat * stat;
struct sockaddr_in servaddr;
stat = malloc(sizeof(struct onload_stat));
/* new sockets created in this thread will not be accelerated */
if( onload_set_stackname(ONLOAD_THIS_THREAD, ONLOAD_SCOPE_THREAD,
ONLOAD_DONT_ACCELERATE) )
perror("Error setting stackname:");
/* set up a basic UDP socket */
s1 = socket(AF_INET, SOCK_DGRAM, 0);
r = onload_fd_stat(s1, stat);
outputStatInfo(r, stat);
close(s1);
/* revert to accelerating sockets */
if( onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_NOCHANGE, "") )
perror("Error setting stackname:");
/* set up a basic UDP socket */
s1 = socket(AF_INET, SOCK_DGRAM, 0);
r = onload_fd_stat(s1, stat);
outputStatInfo(r, stat);
close(s1);
/* give the stack a name */
if( onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_GLOBAL, "s_name") )
perror("Error setting stackname:");
/* set up two basic UDP sockets */
s1 = socket(AF_INET, SOCK_DGRAM, 0);
r = onload_fd_stat(s1, stat);
outputStatInfo(r, stat);
s2 = socket(AF_INET, SOCK_DGRAM, 0);
r = onload_fd_stat(s2, stat);
outputStatInfo(r, stat);
close(s1);
close(s2);
/* tidy up */
free(stat);
}
JNIEXPORT jint JNICALL
Java_OnloadExt_SetStackName ( JNIEnv *env, jclass cls,
jint who, jint scope, jstring stackname )
{
static int have_dont_accel = 0;
static jstring dont_accel;
jint rval;
if( ! have_dont_accel ) {
jfieldID fid = (*env)->GetStaticFieldID(env, cls,
"ONLOAD_DONT_ACCELERATE", "Ljava/lang/String;");
dont_accel = (*env)->GetStaticObjectField(env, cls, fid);
have_dont_accel = 1;
}
if( stackname == dont_accel )
rval = onload_set_stackname( who, scope, ONLOAD_DONT_ACCELERATE );
else {
char* native_stackname = JNU_GetStringNativeChars(env, stackname);
rval = onload_set_stackname( who, scope, native_stackname );
free( (void*) native_stackname );
}
return rval;
}
static void do_server(void)
{
int sl;
int sa1;
int sa2;
int r;
int i;
struct onload_stat * stat;
struct sockaddr_in saddr;
stat = malloc(sizeof(struct onload_stat));
/* create a named stack for the socket */
if( onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_GLOBAL, "initial") )
perror("Error setting stackname:");
/* set up a basic listening TCP socket */
sl = socket(AF_INET, SOCK_STREAM, 0);
bzero(&saddr, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
saddr.sin_port = htons(20001);
bind(sl, (struct sockaddr *) &saddr, sizeof(saddr));
listen(sl, 10);
/* accept the first connection */
printf("Accepting first connection\n");
sa1 = accept(sl, (struct sockaddr *) NULL, NULL);
r = onload_fd_stat(sa1, stat);
outputStatInfo(r, stat);
/* create a new named stack to move the socket to */
if( onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_GLOBAL, "stack1") )
perror("Error setting stackname:");
/* move the socket into the current (stack1) stack */
printf("Moving first connection\n");
onload_move_fd(sa1);
r = onload_fd_stat(sa1, stat);
outputStatInfo(r, stat);
/* accept the second connection */
printf("Accepting second connection\n");
sa2 = accept(sl, (struct sockaddr *) NULL, NULL);
r = onload_fd_stat(sa2, stat);
outputStatInfo(r, stat);
/* create a new named stack to move the socket to */
if( onload_set_stackname(ONLOAD_ALL_THREADS, ONLOAD_SCOPE_GLOBAL, "stack2") )
perror("Error setting stackname:");
/* move the socket into the current (stack2) stack */
printf("Moving second connection\n");
onload_move_fd(sa2);
r = onload_fd_stat(sa2, stat);
outputStatInfo(r, stat);
/* tidy up */
close(sl);
close(sa1);
close(sa2);
free(stat);
}