# kmod RPM spec file for 9P transport module with vsock support

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

# Meta-package requires 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 kernel-specific subpackage
%{expand:%(
kver=$(ls /usr/src/kernels/ 2>/dev/null | grep -v '^\.' | head -n1)
# Strip dist tag and arch from kernel version for package naming
kver_short=$(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
)}

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

%build
# Detect the installed kernel version
kver=$(ls /usr/src/kernels/ 2>/dev/null | grep -v '^\.' | head -n1)
kmod_kernel_dir="/usr/src/kernels/${kver}"

echo "Building for kernel: ${kver}"
echo "Kernel headers at: ${kmod_kernel_dir}"

# 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

# Build the module
%{__make} %{?_smp_mflags} -C "$kmod_kernel_dir" \
    M="${PWD}/$srcdir/net/9p" \
    CONFIG_NET_9P=m \
    CONFIG_NET_9P_FD=m \
    CONFIG_NET_9P_VSOCK=y \
    modules

%install
# Detect the installed kernel version
kver=$(ls /usr/src/kernels/ 2>/dev/null | grep -v '^\.' | head -n1)
kmod_kernel_dir="/usr/src/kernels/${kver}"

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

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

# Install the module
%{__make} -C "$kmod_kernel_dir" \
    M="${PWD}/$srcdir/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

%clean
rm -rf %{buildroot}

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

%changelog
* Thu May 7 2026 Matus Skvarla <mskvarla@redhat.com> - 1.0-1
- Initial kmod package for 9P vsock transport
- Adds vsock transport support to 9pnet_fd module
- Enables mounting 9P filesystems over VM sockets