reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

  poky: 87e3a9739d
  meta-openembedded: 6094ae18c8
  meta-security: 31dc4e7532
  meta-raspberrypi: a48743dc36
  meta-xilinx: c42016e2e6

Also re-apply backports that didn't make it into thud:
  poky:
    17726d0 systemd-systemctl-native: handle Install wildcards

  meta-openembedded:
    4321a5d libtinyxml2: update to 7.0.1
    042f0a3 libcereal: Add native and nativesdk classes
    e23284f libcereal: Allow empty package
    030e8d4 rsyslog: curl-less build with fmhttp PACKAGECONFIG
    179a1b9 gtest: update to 1.8.1

Squashed OpenBMC subtree compatibility updates:
  meta-aspeed:
    Brad Bishop (1):
          aspeed: add yocto 2.6 compatibility

  meta-ibm:
    Brad Bishop (1):
          ibm: prepare for yocto 2.6

  meta-ingrasys:
    Brad Bishop (1):
          ingrasys: set layer compatibility to yocto 2.6

  meta-openpower:
    Brad Bishop (1):
          openpower: set layer compatibility to yocto 2.6

  meta-phosphor:
    Brad Bishop (3):
          phosphor: set layer compatibility to thud
          phosphor: libgpg-error: drop patches
          phosphor: react to fitimage artifact rename

    Ed Tanous (4):
          Dropbear: upgrade options for latest upgrade
          yocto2.6: update openssl options
          busybox: remove upstream watchdog patch
          systemd: Rebase CONFIG_CGROUP_BPF patch

Change-Id: I7b1fe71cca880d0372a82d94b5fd785323e3a9e7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

1 files changed, 26 insertions, 4 deletions

diff --git a/poky/meta/recipes-core/volatile-binds/files/mount-copybind b/poky/meta/recipes-core/volatile-binds/files/mount-copybind
index 2aeaf84dd..fddf52005 100755
--- a/poky/meta/recipes-core/volatile-binds/files/mount-copybind
+++ b/poky/meta/recipes-core/volatile-binds/files/mount-copybind
@@ -8,7 +8,10 @@ if [ $# -lt 2 ]; then
     exit 1
 fi
 
+# e.g. /var/volatile/lib
 spec=$1
+
+# e.g. /var/lib
 mountpoint=$2
 
 if [ $# -gt 2 ]; then
@@ -20,15 +23,34 @@ fi
 [ -n "$options" ] && options=",$options"
 
 mkdir -p "${spec%/*}"
+
 if [ -d "$mountpoint" ]; then
-    if [ ! -d "$spec" ]; then
+
+    if [ -d "$spec" ]; then
+        specdir_existed=yes
+    else
+        specdir_existed=no
         mkdir "$spec"
-        cp -pPR "$mountpoint"/. "$spec/"
+    fi
+
+    # Fast version of calculating `dirname ${spec}`/.`basename ${spec}`-work
+    overlay_workdir="${spec%/*}/.${spec##*/}-work"
+    mkdir "${overlay_workdir}"
+
+    # Try to mount using overlay, which is must faster than copying files.
+    # If that fails, fall back to slower copy.
+    if ! mount -t overlay overlay -olowerdir="$mountpoint",upperdir="$spec",workdir="$overlay_workdir" "$mountpoint" > /dev/null 2>&1; then
+
+        if [ "$specdir_existed" != "yes" ]; then
+            cp -pPR "$mountpoint"/. "$spec/"
+        fi
+
+        mount -o "bind$options" "$spec" "$mountpoint"
     fi
 elif [ -f "$mountpoint" ]; then
     if [ ! -f "$spec" ]; then
         cp -pP "$mountpoint" "$spec"
     fi
-fi
 
-mount -o "bind$options" "$spec" "$mountpoint"
+    mount -o "bind$options" "$spec" "$mountpoint"
+fi