1 files changed, 93 insertions, 0 deletions
diff --git a/recipes-core/initrdscripts/initramfs-framework-dm/dmverity b/recipes-core/initrdscripts/initramfs-framework-dm/dmverity
new file mode 100644
index 0000000..1923490
--- /dev/null
+++ b/recipes-core/initrdscripts/initramfs-framework-dm/dmverity
@@ -0,0 +1,93 @@
+#!/bin/sh
+
+dmverity_enabled() {
+    return 0
+}
+
+dmverity_run() {
+    DATA_SIZE="__not_set__"
+    DATA_BLOCK_SIZE="__not_set__"
+    ROOT_HASH="__not_set__"
+    SEPARATE_HASH="__not_set__"
+
+    . /usr/share/misc/dm-verity.env
+
+    C=0
+    delay=${bootparam_rootdelay:-1}
+    timeout=${bootparam_roottimeout:-5}
+
+    # we know exactly what we are looking for; don't need the wide hunt below
+    if [ "${SEPARATE_HASH}" -eq "1" ]; then
+        while [ ! -b "/dev/disk/by-partuuid/${ROOT_UUID}" ]; do
+            if [ $(( $C * $delay )) -gt $timeout ]; then
+                fatal "Root device (data) resolution failed"
+                exit 1
+            fi
+            debug "Sleeping for $delay second(s) to wait for root data to settle..."
+            sleep $delay
+            C=$(( $C + 1 ))
+        done
+
+        veritysetup \
+            --data-block-size=${DATA_BLOCK_SIZE} \
+            create rootfs \
+            /dev/disk/by-partuuid/${ROOT_UUID} \
+            /dev/disk/by-partuuid/${RHASH_UUID} \
+            ${ROOT_HASH}
+
+            mount \
+                 -o ro \
+                /dev/mapper/rootfs \
+                ${ROOTFS_DIR} || exit 2
+
+	    return
+    fi
+
+    RDEV="$(realpath /dev/disk/by-partuuid/${bootparam_root#PARTUUID=} 2>/dev/null)"
+    while [ ! -b "${RDEV}" ]; do
+        if [ $(( $C * $delay )) -gt $timeout ]; then
+            fatal "Root device resolution failed"
+            exit 1
+        fi
+
+        case "${bootparam_root}" in
+            ID=*)
+                RDEV="$(realpath /dev/disk/by-id/${bootparam_root#ID=} 2>/dev/null)"
+                ;;
+            LABEL=*)
+                RDEV="$(realpath /dev/disk/by-label/${bootparam_root#LABEL=} 2>/dev/null)"
+                ;;
+            PARTLABEL=*)
+                RDEV="$(realpath /dev/disk/by-partlabel/${bootparam_root#PARTLABEL=} 2>/dev/null)"
+                ;;
+            PARTUUID=*)
+                RDEV="$(realpath /dev/disk/by-partuuid/${bootparam_root#PARTUUID=} 2>/dev/null)"
+                ;;
+            PATH=*)
+                RDEV="$(realpath /dev/disk/by-path/${bootparam_root#PATH=} 2>/dev/null)"
+                ;;
+            UUID=*)
+                RDEV="$(realpath /dev/disk/by-uuid/${bootparam_root#UUID=} 2>/dev/null)"
+                ;;
+            *)
+                RDEV="${bootparam_root}"
+        esac
+        debug "Sleeping for $delay second(s) to wait root to settle..."
+        sleep $delay
+        C=$(( $C + 1 ))
+
+    done
+
+    veritysetup \
+        --data-block-size=${DATA_BLOCK_SIZE} \
+        --hash-offset=${DATA_SIZE} \
+        create rootfs \
+        ${RDEV} \
+        ${RDEV} \
+        ${ROOT_HASH}
+
+    mount \
+        -o ro \
+        /dev/mapper/rootfs \
+        ${ROOTFS_DIR} || exit 2
+}