X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fnetdev-linux.c;h=02d8a4d9aa2241a76b0bfcef741a306c10c44d23;hb=15df7ea8d9a338113fc0bd8d2a0a841ec7ce4b6c;hp=9deea57da6408e1f9734d8cbdaf7e8d94fb53849;hpb=6d9e6eb44fc82ae985e6e8db4f156ba56f8bea39;p=openvswitch

diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c
index 9deea57d..02d8a4d9 100644
--- a/lib/netdev-linux.c
+++ b/lib/netdev-linux.c
@@ -563,7 +563,7 @@ netdev_linux_create_tap(const struct netdev_class *class OVS_UNUSED,
 
     /* Create tap device. */
     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
-    strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+    ovs_strzcpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
     if (ioctl(state->fd, TUNSETIFF, &ifr) == -1) {
         VLOG_WARN("%s: creating tap device failed: %s", name,
                   strerror(errno));
@@ -1924,7 +1924,7 @@ do_set_addr(struct netdev *netdev,
             int ioctl_nr, const char *ioctl_name, struct in_addr addr)
 {
     struct ifreq ifr;
-    strncpy(ifr.ifr_name, netdev_get_name(netdev), sizeof ifr.ifr_name);
+    ovs_strzcpy(ifr.ifr_name, netdev_get_name(netdev), sizeof ifr.ifr_name);
     make_in4_sockaddr(&ifr.ifr_addr, addr);
 
     return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, ioctl_nr,
@@ -2045,13 +2045,14 @@ netdev_linux_arp_lookup(const struct netdev *netdev,
     int retval;
 
     memset(&r, 0, sizeof r);
+    memset(&sin, 0, sizeof sin);
     sin.sin_family = AF_INET;
     sin.sin_addr.s_addr = ip;
     sin.sin_port = 0;
     memcpy(&r.arp_pa, &sin, sizeof sin);
     r.arp_ha.sa_family = ARPHRD_ETHER;
     r.arp_flags = 0;
-    strncpy(r.arp_dev, netdev_get_name(netdev), sizeof r.arp_dev);
+    ovs_strzcpy(r.arp_dev, netdev_get_name(netdev), sizeof r.arp_dev);
     COVERAGE_INC(netdev_arp_lookup);
     retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0;
     if (!retval) {
@@ -2365,6 +2366,11 @@ htb_setup_class__(struct netdev *netdev, unsigned int handle,
     int mtu;
 
     netdev_get_mtu(netdev, &mtu);
+    if (mtu == INT_MAX) {
+        VLOG_WARN_RL(&rl, "cannot set up HTB on device %s that lacks MTU",
+                     netdev_get_name(netdev));
+        return EINVAL;
+    }
 
     memset(&opt, 0, sizeof opt);
     tc_fill_rate(&opt.rate, class->min_rate, mtu);
@@ -2484,13 +2490,17 @@ htb_parse_class_details__(struct netdev *netdev,
     const char *priority_s = shash_find_data(details, "priority");
     int mtu;
 
-    /* min-rate.  Don't allow a min-rate below 1500 bytes/s. */
-    if (!min_rate_s) {
-        /* min-rate is required. */
+    netdev_get_mtu(netdev, &mtu);
+    if (mtu == INT_MAX) {
+        VLOG_WARN_RL(&rl, "cannot parse HTB class on device %s that lacks MTU",
+                     netdev_get_name(netdev));
         return EINVAL;
     }
-    hc->min_rate = strtoull(min_rate_s, NULL, 10) / 8;
-    hc->min_rate = MAX(hc->min_rate, 1500);
+
+    /* HTB requires at least an mtu sized min-rate to send any traffic even
+     * on uncongested links. */
+    hc->min_rate = min_rate_s ? strtoull(min_rate_s, NULL, 10) / 8 : 0;
+    hc->min_rate = MAX(hc->min_rate, mtu);
     hc->min_rate = MIN(hc->min_rate, htb->max_rate);
 
     /* max-rate */
@@ -2509,7 +2519,6 @@ htb_parse_class_details__(struct netdev *netdev,
      * doesn't include the Ethernet header, we need to add at least 14 (18?) to
      * the MTU.  We actually add 64, instead of 14, as a guard against
      * additional headers get tacked on somewhere that we're not aware of. */
-    netdev_get_mtu(netdev, &mtu);
     hc->burst = burst_s ? strtoull(burst_s, NULL, 10) / 8 : 0;
     hc->burst = MAX(hc->burst, mtu + 64);
 
@@ -2965,12 +2974,8 @@ hfsc_parse_class_details__(struct netdev *netdev,
     min_rate_s = shash_find_data(details, "min-rate");
     max_rate_s = shash_find_data(details, "max-rate");
 
-    if (!min_rate_s) {
-        return EINVAL;
-    }
-
-    min_rate = strtoull(min_rate_s, NULL, 10) / 8;
-    min_rate = MAX(min_rate, 1500);
+    min_rate = min_rate_s ? strtoull(min_rate_s, NULL, 10) / 8 : 0;
+    min_rate = MAX(min_rate, 1);
     min_rate = MIN(min_rate, hfsc->max_rate);
 
     max_rate = (max_rate_s
@@ -4043,7 +4048,7 @@ do_get_ifindex(const char *netdev_name)
 {
     struct ifreq ifr;
 
-    strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
+    ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
     COVERAGE_INC(netdev_get_ifindex);
     if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) {
         VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s",
@@ -4078,7 +4083,7 @@ get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN])
     int hwaddr_family;
 
     memset(&ifr, 0, sizeof ifr);
-    strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
+    ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
     COVERAGE_INC(netdev_get_hwaddr);
     if (ioctl(af_inet_sock, SIOCGIFHWADDR, &ifr) < 0) {
         VLOG_ERR("ioctl(SIOCGIFHWADDR) on %s device failed: %s",
@@ -4101,7 +4106,7 @@ set_etheraddr(const char *netdev_name, int hwaddr_family,
     struct ifreq ifr;
 
     memset(&ifr, 0, sizeof ifr);
-    strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
+    ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
     ifr.ifr_hwaddr.sa_family = hwaddr_family;
     memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN);
     COVERAGE_INC(netdev_set_hwaddr);
@@ -4120,7 +4125,7 @@ netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *ecmd,
     struct ifreq ifr;
 
     memset(&ifr, 0, sizeof ifr);
-    strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+    ovs_strzcpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
     ifr.ifr_data = (caddr_t) ecmd;
 
     ecmd->cmd = cmd;
@@ -4143,7 +4148,7 @@ static int
 netdev_linux_do_ioctl(const char *name, struct ifreq *ifr, int cmd,
                       const char *cmd_name)
 {
-    strncpy(ifr->ifr_name, name, sizeof ifr->ifr_name);
+    ovs_strzcpy(ifr->ifr_name, name, sizeof ifr->ifr_name);
     if (ioctl(af_inet_sock, cmd, ifr) == -1) {
         VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", name, cmd_name,
                      strerror(errno));