Linux kernel compatability enhancements (through 3.19)

[palacios.git] / linux_module / palacios-vnet-brg.c

diff --git a/linux_module/palacios-vnet-brg.c b/linux_module/palacios-vnet-brg.c
index 309171d..abf4142 100644 (file)
--- a/linux_module/palacios-vnet-brg.c
+++ b/linux_module/palacios-vnet-brg.c
@@ -32,9 +32,9 @@
 
 #define VNET_SERVER_PORT 9000
 
-#define VNET_NOPROGRESS_LIMIT 1000
-
-#define VNET_YIELD_TIME_USEC  1000
+#define VNET_ADAPTIVE_BRIDGE  1      // set this to one to have bridge go to sleep if there nothing to do...
+#define VNET_NOPROGRESS_LIMIT 1000   // ... after this many iterations
+#define VNET_YIELD_TIME_USEC  1000   // ... and go to sleep for this long
 
 struct vnet_link {
     uint32_t dst_ip;
@@ -105,11 +105,11 @@ static void _delete_link(struct vnet_link * link){
 
     link->sock->ops->release(link->sock);
 
-    spin_lock_irqsave(&(vnet_brg_s.lock), flags);
+    palacios_spinlock_lock_irqsave(&(vnet_brg_s.lock), flags);
     list_del(&(link->node));
     vnet_htable_remove(vnet_brg_s.ip2link, (addr_t)&(link->dst_ip), 0);
     vnet_brg_s.num_links --;
-    spin_unlock_irqrestore(&(vnet_brg_s.lock), flags);
+    palacios_spinlock_unlock_irqrestore(&(vnet_brg_s.lock), flags);
 
     INFO("VNET Bridge: Link deleted, ip 0x%x, port: %d, idx: %d\n", 
           link->dst_ip, 
@@ -162,7 +162,12 @@ static uint32_t _create_link(struct vnet_link * link) {
     if (link->sock_proto == UDP) { 
        // no UDP checksumming
        lock_sock(link->sock->sk);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
        link->sock->sk->sk_no_check = 1;
+#else
+       link->sock->sk->sk_no_check_tx = 1;
+       link->sock->sk->sk_no_check_rx = 1;
+#endif
        release_sock(link->sock->sk);
     }
 
@@ -173,18 +178,18 @@ static uint32_t _create_link(struct vnet_link * link) {
     link->sock_addr.sin_port = htons(link->dst_port);
 
 
-    if ((err = link->sock->ops->connect(link->sock, (struct sockaddr *)&(link->sock_addr), sizeof(struct sockaddr), 0) < 0)) {
+    if ((err = link->sock->ops->connect(link->sock, (struct sockaddr *)&(link->sock_addr), sizeof(struct sockaddr), 0)) < 0) {
        WARNING("Could not connect to remote VNET Server, error %d\n", err);
        return -1;
     }
 
 
-    spin_lock_irqsave(&(vnet_brg_s.lock), flags);
+    palacios_spinlock_lock_irqsave(&(vnet_brg_s.lock), flags);
     list_add(&(link->node), &(vnet_brg_s.link_list));
     vnet_brg_s.num_links ++;
     link->idx = ++ vnet_brg_s.link_idx;
     vnet_htable_insert(vnet_brg_s.ip2link, (addr_t)&(link->dst_ip), (addr_t)link);
-    spin_unlock_irqrestore(&(vnet_brg_s.lock), flags);
+    palacios_spinlock_unlock_irqrestore(&(vnet_brg_s.lock), flags);
 
     INFO("VNET Bridge: Link created, ip 0x%x, port: %d, idx: %d, link: %p, protocol: %s\n", 
           link->dst_ip, 
@@ -258,8 +263,12 @@ _udp_send(struct socket * sock,
     msg.msg_namelen = sizeof(struct sockaddr_in);
     msg.msg_control = NULL;
     msg.msg_controllen = 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
     msg.msg_iov = &iov;
     msg.msg_iovlen = 1;
+#else
+    iov_iter_init(&(msg.msg_iter),WRITE,&iov,1,0);
+#endif
     msg.msg_control = NULL;
 
     oldfs = get_fs();
@@ -293,8 +302,12 @@ _udp_recv(struct socket * sock,
     msg.msg_namelen = sizeof(struct sockaddr_in);
     msg.msg_control = NULL;
     msg.msg_controllen = 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
     msg.msg_iov = &iov;
     msg.msg_iovlen = 1;
+#else
+    iov_iter_init(&(msg.msg_iter),READ,&iov,1,0);
+#endif
     msg.msg_control = NULL;
     
     oldfs = get_fs();
@@ -403,7 +416,12 @@ static int init_vnet_serv(void) {
     if (vnet_brg_s.serv_proto == UDP) { 
        // No UDP checksumming is done
        lock_sock(vnet_brg_s.serv_sock->sk);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
        vnet_brg_s.serv_sock->sk->sk_no_check = 1;
+#else
+       vnet_brg_s.serv_sock->sk->sk_no_check_tx = 1;
+       vnet_brg_s.serv_sock->sk->sk_no_check_rx = 1;
+#endif
        release_sock(vnet_brg_s.serv_sock->sk);
     }
 
@@ -472,14 +490,14 @@ static int _udp_server(void * arg) {
            
            // adaptively select yielding strategy depending on
            // whether we are making progress
-           if (noprogress_count < VNET_NOPROGRESS_LIMIT) { 
+           if ((!VNET_ADAPTIVE_BRIDGE) || (noprogress_count < VNET_NOPROGRESS_LIMIT)) { 
                // Likely making progress, do fast yield so we 
                // come back immediately if there is no other action
                palacios_yield_cpu();
            } else {
                // Likely not making progress, do potentially slow
                // yield - we won't come back for until VNET_YIELD_TIME_USEC has passed
-               palacios_yield_cpu_timed(VNET_YIELD_TIME_USEC);
+               palacios_sleep_cpu(VNET_YIELD_TIME_USEC);
            }
 
            continue;
@@ -556,7 +574,7 @@ int vnet_bridge_init(void) {
     memset(&vnet_brg_s, 0, sizeof(struct vnet_brg_state));
 
     INIT_LIST_HEAD(&(vnet_brg_s.link_list));
-    spin_lock_init(&(vnet_brg_s.lock));
+    palacios_spinlock_init(&(vnet_brg_s.lock));
 
     vnet_brg_s.serv_proto = UDP;
 
@@ -610,6 +628,8 @@ void vnet_bridge_deinit(void){
 
     vnet_brg_s.status = 0;
 
+    palacios_spinlock_deinit(&(vnet_brg_s.lock));
+
     INFO("VNET LNX Bridge Deinit Finished\n");
 }