name: apply susfs patches
description: apply susfs patches
inputs:
 nomount:
  description: 'nomount'
  required: true

runs:
  using: composite
  steps:
   - name: clone susfs
     shell: bash
     run: |
      SUSFS_BRANCH="gki-$ANDROID_VER-$KERNEL_VER"
      git clone https://gitlab.com/simonpunk/susfs4ksu.git -b "$SUSFS_BRANCH"

      git config --global user.name "github-actions[bot]"
      git config --global user.email "41898282+github-actions[bot]@://github.com"
      
      cd susfs4ksu
      git fetch https://gitlab.com/pershoot/susfs4ksu.git gki-android14-6.1-dev
      git log ..FETCH_HEAD --oneline -n 2 | awk '{print $1}' | tac | xargs git cherry-pick
      
      #cd susfs4ksu
      #if [[ "$ANDROID_VER-$KERNEL_VER" == "android12-5.10" ]]; then
        #COMMIT=ce2c2b2dea28c89d33f61af898cc18a93bf65ae9
      #elif [[ "$ANDROID_VER-$KERNEL_VER" == "android13-5.15" ]]; then
       # COMMIT=529919fbc9f8aee6ee70eb3a8890ef33af0a109c
      #elif [[ "$ANDROID_VER-$KERNEL_VER" == "android14-6.1" ]]; then
        #COMMIT=d1327b62e0854603cfc26e2226e0a993ec9b0656
      #elif [[ "$ANDROID_VER-$KERNEL_VER" == "android15-6.6" ]]; then
        #COMMIT=676d202ed2cc322a2f90bcb2b56bc4f6a864acb8
      #fi
      #git checkout "$COMMIT"

      SUSFS4KSU="$ROOT/susfs4ksu"
      echo "SUSFS4KSU=$SUSFS4KSU" >> $GITHUB_ENV
      
   - name: Apply to KSUN
     shell: bash
     run: |
       #cd "$COMMON/KernelSU-Next"
       #SUSFS_VERSION="v2.1.0"
          
       # Apply SUSFS to KernelSU-Next
       #cp "$SUSFS4KSU/kernel_patches/KernelSU/10_enable_susfs_for_ksu.patch" .
       #patch -p1 < 10_enable_susfs_for_ksu.patch || true
       #rm -rf 10_enable_susfs_for_ksu.patch

       #Fix rejects from adding susfs to KSUN
       #cp "$KERNEL_PATCHES/next/susfs_fix_patches/$SUSFS_VERSION/"*.patch .
       #rm -rf multi_manager.patch
       #for p in *.patch; do
       #    patch -p1 < "$p"
       #    rm -f "$p"
       #done
       
   - name: Copy required files
     shell: bash
     run: |
      # Apply SUSFS to kernel
      cd "$COMMON"
      cp "$SUSFS4KSU/kernel_patches/fs/"* ./fs/
      cp "$SUSFS4KSU/kernel_patches/include/linux/"* ./include/linux/
      cp "$SUSFS4KSU/kernel_patches/50_add_susfs_in_gki-$ANDROID_VER-$KERNEL_VER.patch" ./          

   - name: prepare namespace and open.c for susfs patch because scamsung
     shell: bash
     run: |
      cd "$COMMON"
      #Prepare open.c for susfs patching
      sed -i '/#ifdef CONFIG_SECURITY_DEFEX/,/^#endif/d' fs/open.c

      #Prepare namespace.c for susfs patching
      sed -i '/copy_flags = CL_COPY_UNBINDABLE | CL_EXPIRE;/,/#endif/ {
        /#ifdef CONFIG_KDP_NS/,/#endif/ {
           /#else/,/#endif/!d
           /#else/d
           /#endif/d
        }
       }' fs/namespace.c
          
   - name: apply susfs patch and fix if necessary
     shell: bash
     run: |
      cd "$COMMON"
      # Apply SUSFS core patch
      patch -p1 < 50_add_susfs_in_gki-$ANDROID_VER-$KERNEL_VER.patch || true
      rm -rf 50_add_susfs_in_gki-$ANDROID_VER-$KERNEL_VER.patch

      shopt -s nullglob
      patches=("$KERNEL_PATCHES/samsung/$BRANCH"/*.patch)
      
      if [ ${#patches[@]} -gt 0 ]; then
       echo "Patches found, applying..."
       cp "${patches[@]}" ./
       
       # Fix SUSFS rejects
        for p in *.patch; do
          patch -p1 < "$p"
          rm -f "$p"
        done
        shopt -u nullglob
      else
        echo "No patch file found, skipping"
      fi

        # SUSFS's OPEN_REDIRECT code unconditionally calls VMA_PAD_START(), which
        # only exists on GKI branches that carry Google's page-size-migration
        # feature (added to each android version's kernel/common branch at a
        # different, sometime later, os_patch_level). Older os_patch_levels in
        # our build matrix predate it, so fall back to a no-padding definition
        # when the real header/macro isn't present. This is version-agnostic and
        # a no-op wherever the real header already provides it.
        if grep -q 'VMA_PAD_START(' fs/proc/task_mmu.c && ! grep -qE '#include <linux/pgsize_migration(_inline)?\.h>|define VMA_PAD_START' fs/proc/task_mmu.c; then
          sed -i '1a #ifndef VMA_PAD_START\n#define VMA_PAD_START(vma) ((vma)->vm_end)\n#endif' fs/proc/task_mmu.c
          echo "Added VMA_PAD_START fallback definition to fs/proc/task_mmu.c"
        fi

        # Same story for __fold_filemap_fixup_entry(), declared in page_size_compat.h.
        if grep -q '__fold_filemap_fixup_entry' fs/proc/task_mmu.c && ! grep -q '#include <linux/page_size_compat.h>' fs/proc/task_mmu.c; then
          sed -i '/#include <linux\/pkeys.h>/a #include <linux/page_size_compat.h>' fs/proc/task_mmu.c
          echo "Added page_size_compat.h include to fs/proc/task_mmu.c"
        fi
       
   - name: add ksu-susfs to config
     shell: bash
     run: |
      "$COMMON/scripts/config" --file "$GKI_DEFCONFIG" --enable CONFIG_KSU_SUSFS

   - name: remove open redirect if nomount is enabled
     if: inputs.nomount == 'true'
     shell: bash
     run: |
      "$COMMON/scripts/config" --file "$GKI_DEFCONFIG" --disable CONFIG_KSU_SUSFS_OPEN_REDIRECT