From 8eedb041a8fccdd6c2656e2f7d1f55c973619dc2 Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Fri, 1 Dec 2017 08:21:40 -0200
Subject: Adds shared_folders_msize and shared_folders_cache options

---
 kvmx     | 10 +++++++++-
 kvmxfile |  9 +++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/kvmx b/kvmx
index fc7ba38..30981d8 100755
--- a/kvmx
+++ b/kvmx
@@ -361,6 +361,14 @@ function kvmx_up {
     nic_model="virtio"
   fi
 
+  if [ -z "$shared_folder_msize" ]; then
+    shared_folders_msize="524288"
+  fi
+
+  if [ -z "$shared_folders_cache" ]; then
+    shared_folders_cache="none"
+  fi
+
   # Run virtual machine
   # See https://en.wikipedia.org/wiki/Nohup#Overcoming_hanging
   nohup kvm -m $memory -name $VM -drive file=$image,if=$drive_interface $graphics $shared \
@@ -417,7 +425,7 @@ function kvmx_up {
     if [ ! -z "$shared_folder" ] && [ ! -z "$shared_folder_mountpoint" ]; then
       echo "Mounting $shared_folder on $shared_folder_mountpoint on guest..."
       echo "sudo mkdir -p $shared_folder_mountpoint" | kvmx_ssh
-      echo "sudo mount -t 9p -o trans=virtio shared $shared_folder_mountpoint -oversion=9p2000.L,posixacl,cache=none -o sync -o dirsync" | kvmx_ssh
+      echo "sudo mount -t 9p -o trans=virtio,msize=$shared_folders_msize shared $shared_folder_mountpoint -oversion=9p2000.L,posixacl,cache=$shared_folders_cache -o sync -o dirsync" | kvmx_ssh
       #echo "sudo mount //10.0.2.4/qemu $shared_folder_mountpint" | kvmx_ssh
     elif [ ! -z "$shared_folders" ]; then
       local old_ifs="$IFS"
diff --git a/kvmxfile b/kvmxfile
index 6926e21..248f2cf 100644
--- a/kvmxfile
+++ b/kvmxfile
@@ -22,6 +22,15 @@ shared_folder_mountpoint="/home/$user/code/$VM"
 # Format: <id1>:<host-folder1>:<guest-mountpoint1>,<id2>:<host-folder2>:<guest-mountpoint2>[,...]
 #shared_folders="shared1:.:/home/$user/code/$VM,shared2:$HOME/.local/share/app:/home/$user/.local/share/app"
 
+# Maximum packet size including any headers for shared folders using 9p
+# See https://forums.lime-technology.com/topic/34691-9p-sharing-speed-not-what-i-expected/
+#     https://github.com/clearcontainers/hyperstart/pull/25
+#shared_folders_msize="524288"
+
+# Shared folders caching
+# See https://www.kernel.org/doc/Documentation/filesystems/9p.txt
+#shared_folders_cache="none"
+
 # Folder to sync during provisioning in the format "/host/folder1 /guest/folder1,/host/folder2 /guest/folder2[,...]".
 #provision_rsync="$KVMX_BASE/share/provision/ /usr/local/share/kvmx/provision/"
 #provision_rsync="puppet/ /etc/puppet/"
-- 
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