vm/core: use mount --bind instead of symlink for /home

Many applications doesn't like /home as symlink ($HOME differs from real
location).

misc/fstab

@@ -8,6 +8,7 @@
 #
 /dev/mapper/dmroot /                       ext4 defaults,noatime        1 1
 /dev/xvdb		/rw			ext4	noauto,defaults	1 2
+/rw/home        /home       none    noauto,bind,defaults 0 0
 /dev/xvdc1      swap                    swap    defaults        0 0
 tmpfs                   /dev/shm                tmpfs   defaults        0 0
 devpts                  /dev/pts                devpts  gid=5,mode=620  0 0

vm-init.d/qubes_core

@@ -65,14 +65,19 @@ start()
             touch /rw/config/rc.local
 
             mkdir -p /rw/home
-            cp -a /home.orig/user /home
+            cp -a /home.orig/user /rw/home
 
             mkdir -p /rw/usrlocal
-            cp -a /usr/local.orig/* /usr/local
+            cp -a /usr/local.orig/* /rw/usrlocal
 
             touch /var/lib/qubes/first_boot_completed
         fi
 	fi
+    if [ -L /home ]; then
+        rm /home
+        mkdir /home
+    fi
+    mount /home
 
 	/usr/lib/qubes/qrexec_agent 2>/var/log/qubes/qrexec_agent.log &
 

vm-init.d/qubes_core_appvm

@@ -45,7 +45,11 @@ start()
 	echo -n $"Executing Qubes Core scripts for AppVM:"
 
 	if xenstore-read qubes_save_request 2>/dev/null ; then
-		ln -sf /home_volatile /home
+        if [ -L /home ]; then
+            rm /home
+            mkdir /home
+        fi
+        mount --bind /home_volatile /home
 		touch /etc/this_is_dvm
 		mount /rw
 		possibly_run_save_script

vm-systemd/misc-post.sh

@@ -24,18 +24,23 @@ if [ -e /dev/xvdb -a ! -e /etc/this_is_dvm ] ; then
         touch /rw/config/rc.local-early
 
         mkdir -p /rw/home
-        cp -a /home.orig/user /home
+        cp -a /home.orig/user /rw/home
 
         mkdir -p /rw/usrlocal
-        cp -a /usr/local.orig/* /usr/local
+        cp -a /usr/local.orig/* /rw/usrlocal
 
         touch /var/lib/qubes/first_boot_completed
     fi
     # Chown home if user UID have changed - can be the case on template switch
-    HOME_USER_UID=`ls -dn /home/user | awk '{print $3}'`
+    HOME_USER_UID=`ls -dn /rw/home/user | awk '{print $3}'`
     if [ "`id -u user`" -ne "$HOME_USER_UID" ]; then
-        find /home/user -uid "$HOME_USER_UID" -print0 | xargs -0 chown user:user
+        find /rw/home/user -uid "$HOME_USER_UID" -print0 | xargs -0 chown user:user
     fi
+    if [ -L /home ]; then
+        rm /home
+        mkdir /home
+    fi
+    mount /home
 fi
 
 [ -x /rw/config/rc.local ] && /rw/config/rc.local

vm-systemd/prepare-dvm.sh

@@ -13,7 +13,11 @@ possibly_run_save_script()
 }
 
 if xenstore-read qubes_save_request 2>/dev/null ; then
-    ln -sf /home_volatile /home
+    if [ -L /home ]; then
+        rm /home
+        mkdir /home
+    fi
+    mount --bind /home_volatile /home
     touch /etc/this_is_dvm
     mount /rw
     possibly_run_save_script