# kmod RPM spec file for 9P transport module with vsock support
# Builds for all available kernel-devel versions

%define kmod_name 9pnet_fd-vsock
%define kmod_driver_version 1.0
%define kmod_rpm_release 1

# Disable debug package generation
%global debug_package %{nil}

Name:           kmod-%{kmod_name}
Version:        %{kmod_driver_version}
Release:        %{kmod_rpm_release}%{?dist}
Summary:        9P transport kernel module with vsock support
Group:          System Environment/Kernel
License:        GPLv3
URL:            https://github.com/redbeam/v9fs-vsock
Source0:        v9fs-vsock-%{version}.tar.gz

BuildRequires:  redhat-rpm-config

# Build for multiple kernel versions - manually update this list
%if 0%{?fedora} == 44
# BuildRequires:  kernel-devel = 6.19.10-300.fc44
BuildRequires:  kernel-devel = 7.0.10-200.fc44
%endif

%if 0%{?fedora} == 43
# BuildRequires:  kernel-devel = 6.17.1-300.fc43
BuildRequires:  kernel-devel = 7.0.10-100.fc43
%endif

%if 0%{?rhel} == 10
BuildRequires:  kernel-devel = 6.12.0-227.el10
%endif

%if 0%{?rhel} >= 8
BuildRequires:  elfutils-libelf-devel
%endif

# Require at least one kernel-specific subpackage
Requires:       kmod-%{kmod_name}-module

%description
This is a meta-package that automatically installs the 9P transport kernel
module matching your currently installed kernel.

The 9P transport module provides vsock support, enabling mounting 9P filesystems
over VM sockets (vsock) for efficient communication between virtual machines and
their hosts, or between containers and hosts.

Mount syntax: mount -t 9p -o trans=vsock <CID> /mnt/point

Install this package to get the appropriate kernel module for your system.

# Generate subpackages for each kernel version found in /usr/src/kernels/
%{expand:%(
for kver in $(ls /usr/src/kernels/ 2>/dev/null | grep -v '^\\.'); do
  # Strip dist tag and arch from kernel version for package naming
  # e.g., 7.0.9-204.fc44.x86_64 -> 7.0.9-204
  kver_short=$(echo "$kver" | sed 's/\.[^.]*\.[^.]*$//')
  cat <<EOF

%%package -n kmod-%{kmod_name}-${kver_short}
Summary: %{summary} for kernel ${kver}
Group: System Environment/Kernel
Provides: kmod-%{kmod_name} = %{?epoch:%{epoch}:}%{version}-%{release}
Provides: kmod-%{kmod_name}-module = %{?epoch:%{epoch}:}%{version}-%{release}
Provides: kmod-9pnet = %{?epoch:%{epoch}:}%{version}-%{release}
Requires: kernel-core = ${kver}
Requires(post): /usr/sbin/depmod
Requires(postun): /usr/sbin/depmod
Supplements: (kmod-%{kmod_name} and kernel-core = ${kver})

%%description -n kmod-%{kmod_name}-${kver_short}
This package provides the %{kmod_name} kernel module built for kernel ${kver}.

%%post -n kmod-%{kmod_name}-${kver_short}
/sbin/depmod -a ${kver} > /dev/null 2>&1 || :

%%postun -n kmod-%{kmod_name}-${kver_short}
/sbin/depmod -a ${kver} > /dev/null 2>&1 || :

%%files -n kmod-%{kmod_name}-${kver_short}
%%defattr(-,root,root,-)
/lib/modules/${kver}/extra/%{kmod_name}/

EOF
done
)}

%prep
%setup -q -n v9fs-vsock-%{version}

# Choose the correct source directory based on distro
%if 0%{?fedora}
echo "Fedora build - using linux/ sources"
srcdir=linux
%else
echo "RHEL/EL build - using rhel/ sources"
srcdir=rhel
%endif

# Create build directories for each kernel version
for kver in $(ls /usr/src/kernels/ 2>/dev/null | grep -v '^\\.'); do
    echo "Preparing build directory for kernel ${kver}"
    mkdir -p "_kmod_build_${kver}"
    cp -r $srcdir/net "_kmod_build_${kver}/"
done

%build
echo "=========================================="
echo "Building for multiple kernel versions"
echo "=========================================="
echo "Detected kernel versions:"
ls /usr/src/kernels/ 2>/dev/null | grep -v '^\.' | while read kver; do echo "  - $kver"; done
echo "=========================================="

# Choose the correct source directory based on distro
%if 0%{?fedora}
srcdir=linux
%else
srcdir=rhel
%endif

for kver in $(ls /usr/src/kernels/ 2>/dev/null | grep -v '^\\.'); do
    kmod_kernel_dir="/usr/src/kernels/${kver}"

    echo "Building for kernel: ${kver}"

    %{__make} %{?_smp_mflags} -C "$kmod_kernel_dir" \
        M="${PWD}/_kmod_build_${kver}/net/9p" \
        CONFIG_NET_9P=m \
        CONFIG_NET_9P_FD=m \
        CONFIG_NET_9P_VSOCK=y \
        modules
done

echo "=========================================="

%install
# Choose the correct source directory based on distro
%if 0%{?fedora}
srcdir=linux
%else
srcdir=rhel
%endif

for kver in $(ls /usr/src/kernels/ 2>/dev/null | grep -v '^\\.'); do
    kmod_kernel_dir="/usr/src/kernels/${kver}"

    echo "Installing modules for kernel: ${kver}"

    %{__make} -C "$kmod_kernel_dir" \
        M="${PWD}/_kmod_build_${kver}/net/9p" \
        INSTALL_MOD_PATH=%{buildroot} \
        INSTALL_MOD_DIR=extra/%{kmod_name} \
        CONFIG_NET_9P=m \
        CONFIG_NET_9P_FD=m \
        CONFIG_NET_9P_VSOCK=y \
        modules_install

    # Remove unwanted files
    find %{buildroot} -name "*.cmd" -delete
    find %{buildroot} -name ".*.d" -delete
    rm -f %{buildroot}/lib/modules/${kver}/modules.*

    # Sign modules if signing is configured
    %if 0%{?rhel} >= 8
    for module in $(find %{buildroot}/lib/modules/${kver} -type f -name \*.ko 2>/dev/null); do
        %{__strip} --strip-debug "$module"
    done
    %endif
done

%clean
rm -rf %{buildroot}

%files
%defattr(-,root,root,-)
%doc README.md
%license LICENSE

%changelog
* Tue May 26 2026 Matus Skvarla <mskvarla@redhat.com> - 1.0-1
- Modified to build for all available kernel-devel versions
- Creates separate subpackage for each kernel version
- Initial kmod package for 9P vsock transport
- Adds vsock transport support to 9pnet_fd module
- Enables mounting 9P filesystems over VM sockets