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systemd: add extra capabilities when building with CLAT

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Since 5.8, kernel requires CAP_BPF for processes that want to use
eBPF. CAP_PERFMON is also required for certain operations performed by
the BPF program.

Add the capabilities to the service unit when we are building with CLAT
support.
This commit is contained in:
Beniamino Galvani 2024-02-05 20:28:42 +01:00
parent cfeee6d26b
commit d184c21994
2 changed files with 10 additions and 1 deletions
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2
data/NetworkManager.service.in
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@ -19,7 +19,7 @@ KillMode=process
# With a huge number of interfaces, starting can take a long time.
TimeoutStartSec=600
CapabilityBoundingSet=CAP_NET_ADMIN CAP_DAC_OVERRIDE CAP_NET_RAW CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_SYS_MODULE CAP_AUDIT_WRITE CAP_KILL CAP_SYS_CHROOT
CapabilityBoundingSet=CAP_NET_ADMIN CAP_DAC_OVERRIDE CAP_NET_RAW CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_SYS_MODULE CAP_AUDIT_WRITE CAP_KILL CAP_SYS_CHROOT @SERVICE_EXTRA_CAPABILITIES@
ProtectSystem=true
ProtectHome=read-only

9
meson.build
View file

@ -26,6 +26,7 @@ nm_micro_version = version_array[2].to_int()
nm_id_prefix = 'NM'
nm_gir_version = '1.0'
service_extra_capabilities = []
# Distribution version string
dist_version = get_option('dist_version')
@ -495,6 +496,12 @@ if enable_clat
libbpf = dependency('libbpf', version: '>= 0.1.0', required: false)
assert(libbpf.found(), 'You must have libbpf installed to build. Use -Dclat=false to disable use of it')
libxdp = dependency('libxdp', version: '>= 0.1.0', required: false)
if 'CAP_BPF' not in service_extra_capabilities
service_extra_capabilities += 'CAP_BPF'
endif
if 'CAP_PERFMON' not in service_extra_capabilities
service_extra_capabilities += 'CAP_PERFMON'
endif
endif
config_h.set10('HAVE_CLAT', enable_clat)
@ -963,6 +970,7 @@ data_conf.set('NM_MAJOR_VERSION', nm_major_version)
data_conf.set('NM_MICRO_VERSION', nm_micro_version)
data_conf.set('NM_MINOR_VERSION', nm_minor_version)
data_conf.set('NM_MODIFY_SYSTEM_POLICY', (enable_modify_system ? 'yes' : 'auth_admin_keep'))
data_conf.set('SERVICE_EXTRA_CAPABILITIES', ' '.join(service_extra_capabilities))
data_conf.set('NM_VERSION', nm_version)
data_conf.set('VERSION', nm_version)
data_conf.set('bindir', nm_bindir)
@ -1169,4 +1177,5 @@ output += ' vapi: ' + enable_vapi.to_string() + '\n'
output += ' ebpf: ' + enable_ebpf.to_string() + '\n'
output += ' clat: ' + enable_clat.to_string() + '\n'
output += ' readline: ' + with_readline + '\n'
output += ' systemd service extra capabilities: ' + ', '.join(service_extra_capabilities) + '\n'
message(output)