fix: Set MTU value (#911)

Dockerfile

@@ -35,12 +35,16 @@ RUN set -eu && extra="" && \
         dnsmasq \
         fakeroot \
         net-tools \
+        e2fsprogs \
         qemu-utils \
+        iputils-ping \
         ca-certificates \
         netcat-openbsd \
         qemu-system-x86 \
         "$extra" && \
     apt-get clean && \
+    mkdir -p /etc/qemu && \
+    echo "allow br0" > /etc/qemu/bridge.conf && \
     unlink /etc/nginx/sites-enabled/default && \
     sed -i 's/^worker_processes.*/worker_processes 1;/' /etc/nginx/nginx.conf && \
     echo "$VERSION_ARG" > /run/version && \
@@ -49,7 +53,7 @@ RUN set -eu && extra="" && \
 COPY --chmod=755 ./src /run/
 COPY --chmod=755 ./web /var/www/
 COPY --chmod=755 --from=builder /qemu-host.bin /run/host.bin
-COPY --chmod=744 ./web/nginx.conf /etc/nginx/sites-enabled/web.conf
+COPY --chmod=744 ./web/conf/nginx.conf /etc/nginx/sites-enabled/web.conf
 
 VOLUME /storage
 EXPOSE 22 139 445 5000

readme.md

@@ -40,6 +40,7 @@ services:
       - 5000:5000
     volumes:
       - /var/dsm:/storage
+    restart: always
     stop_grace_period: 2m
 ```
 
@@ -222,7 +223,7 @@ kubectl apply -f https://raw.githubusercontent.com/vdsm/virtual-dsm/refs/heads/m
 
   After configuring the container for [macvlan](#how-do-i-assign-an-individual-ip-address-to-the-container), it is possible for DSM to become part of your home network by requesting an IP from your router, just like your other devices.
 
-  To enable this mode, add the following lines to your compose file:
+  To enable this mode, in which the container and DSM will have separate IP addresses, add the following lines to your compose file:
 
   ```yaml
   environment:
@@ -233,9 +234,6 @@ kubectl apply -f https://raw.githubusercontent.com/vdsm/virtual-dsm/refs/heads/m
     - 'c *:* rwm'
   ```
 
-> [!NOTE]
-> In this mode, the container and DSM will each have their own separate IPs.
-
 ### How do I pass-through the GPU?
 
   To pass-through your Intel GPU, add the following lines to your compose file:

src/entry.sh

@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
-APP="Virtual DSM"
+: "${APP:="Virtual DSM"}"
-SUPPORT="https://github.com/vdsm/virtual-dsm"
+: "${SUPPORT:="https://github.com/vdsm/virtual-dsm"}"
 
 cd /run
 

src/network.sh

@@ -4,6 +4,7 @@ set -Eeuo pipefail
 # Docker environment variables
 
 : "${MAC:=""}"
+: "${MTU:=""}"
 : "${DHCP:="N"}"
 : "${NETWORK:="Y"}"
 : "${USER_PORTS:=""}"
@@ -58,6 +59,12 @@ configureDHCP() {
       fi ;;
   esac
 
+  if [[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]]; then
+    if ! ip link set dev "$VM_NET_TAP" mtu "$MTU"; then
+      warn "Failed to set MTU size.."
+    fi
+  fi
+
   while ! ip link set "$VM_NET_TAP" up; do
     info "Waiting for MAC address $VM_NET_MAC to become available..."
     sleep 2
@@ -213,6 +220,18 @@ configureNAT() {
     error "$tuntap" && return 1
   fi
 
+  if [[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]]; then
+    if ! ip link set dev "$VM_NET_TAP" mtu "$MTU"; then
+      warn "Failed to set MTU size.."
+    fi
+  fi
+
+  GATEWAY_MAC=$(echo "$VM_NET_MAC" | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4:\5/')
+
+  if ! ip link set dev "$VM_NET_TAP" address "$GATEWAY_MAC"; then
+    warn "Failed to set gateway MAC address.."
+  fi
+
   while ! ip link set "$VM_NET_TAP" up promisc on; do
     info "Waiting for TAP to become available..."
     sleep 2
@@ -338,6 +357,20 @@ getInfo() {
     error "$ADD_ERR -e \"VM_NET_DEV=NAME\" to specify another interface name." && exit 27
   fi
 
+  if [ -z "$MTU" ]; then
+    MTU=$(cat "/sys/class/net/$VM_NET_DEV/mtu")
+  fi
+
+  if [ "$MTU" -gt "1500" ]; then
+    info "MTU size is too large: $MTU, ignoring..." && MTU="0"
+  fi
+
+  if [[ "${ADAPTER,,}" != "virtio-net-pci" ]]; then
+    if [[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]]; then
+      warn "MTU size is $MTU, but cannot be set for $ADAPTER adapters!" && MTU="0"
+    fi
+  fi
+
   if [ -z "$VM_NET_MAC" ]; then
     local file="$STORAGE/dsm.mac"
     [ -s "$file" ] && VM_NET_MAC=$(<"$file")
@@ -380,7 +413,10 @@ getInfo
 html "Initializing network..."
 
 if [[ "$DEBUG" == [Yy1]* ]]; then
-  info "Host: $HOST  IP: $IP  Gateway: $GATEWAY  Interface: $VM_NET_DEV  MAC: $VM_NET_MAC"
+  mtu=$(cat "/sys/class/net/$VM_NET_DEV/mtu")
+  line="Host: $HOST  IP: $IP  Gateway: $GATEWAY  Interface: $VM_NET_DEV  MAC: $VM_NET_MAC  MTU: $mtu"
+  [[ "$MTU" != "0" ]] && [[ "$MTU" != "$mtu" ]] && line+=" ($MTU)"
+  info "$line"
   [ -f /etc/resolv.conf ] && grep '^nameserver*' /etc/resolv.conf
   echo
 fi
@@ -389,6 +425,11 @@ if [[ "$IP" == "172.17."* ]]; then
   warn "your container IP starts with 172.17.* which will cause conflicts when you install the Container Manager package inside DSM!"
 fi
 
+if [[ -d "/sys/class/net/$VM_NET_TAP" ]]; then
+    info "Lingering interface will be removed..."
+    ip link delete "$VM_NET_TAP" || true
+fi
+
 if [[ "$DHCP" == [Yy1]* ]]; then
 
   checkOS
@@ -440,6 +481,7 @@ else
 
 fi
 
-NET_OPTS+=" -device $ADAPTER,romfile=,netdev=hostnet0,mac=$VM_NET_MAC,id=net0"
+NET_OPTS+=" -device $ADAPTER,id=net0,netdev=hostnet0,romfile=,mac=$VM_NET_MAC"
+[[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]] && NET_OPTS+=",host_mtu=$MTU"
 
 return 0

src/reset.sh

@@ -64,11 +64,16 @@ if [ -z "${CPU// /}" ] && grep -qi "model:" <<< "$CPI"; then
 fi
 
 CPU="${CPU// CPU/}"
+CPU="${CPU// 8 Core/}"
 CPU="${CPU// 16 Core/}"
+CPU="${CPU// 32 Core/}"
+CPU="${CPU// 64 Core/}"
 CPU="${CPU// Processor/}"
 CPU="${CPU// Quad core/}"
 CPU="${CPU// Core TM/ Core}"
 CPU="${CPU// with Radeon Graphics/}"
+CPU="${CPU// with Radeon Vega Graphics/}"
+
 [ -z "${CPU// /}" ] && CPU="Unknown"
 
 # Check system