mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2025-11-04 00:22:26 -06:00
57dc742c76Bumps [github.com/KimMachineGun/automemlimit](https://github.com/KimMachineGun/automemlimit) from 0.2.4 to 0.2.5. - [Release notes](https://github.com/KimMachineGun/automemlimit/releases) - [Commits](https://github.com/KimMachineGun/automemlimit/compare/v0.2.4...v0.2.5) --- updated-dependencies: - dependency-name: github.com/KimMachineGun/automemlimit dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
96 lines
2.5 KiB
Go
96 lines
2.5 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package cgroup2
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/cilium/ebpf"
|
|
"github.com/cilium/ebpf/asm"
|
|
"github.com/cilium/ebpf/link"
|
|
"github.com/opencontainers/runtime-spec/specs-go"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// LoadAttachCgroupDeviceFilter installs eBPF device filter program to /sys/fs/cgroup/<foo> directory.
|
|
//
|
|
// Requires the system to be running in cgroup2 unified-mode with kernel >= 4.15 .
|
|
//
|
|
// https://github.com/torvalds/linux/commit/ebc614f687369f9df99828572b1d85a7c2de3d92
|
|
func LoadAttachCgroupDeviceFilter(insts asm.Instructions, license string, dirFD int) (func() error, error) {
|
|
nilCloser := func() error {
|
|
return nil
|
|
}
|
|
spec := &ebpf.ProgramSpec{
|
|
Type: ebpf.CGroupDevice,
|
|
Instructions: insts,
|
|
License: license,
|
|
}
|
|
prog, err := ebpf.NewProgram(spec)
|
|
if err != nil {
|
|
return nilCloser, err
|
|
}
|
|
err = link.RawAttachProgram(link.RawAttachProgramOptions{
|
|
Target: dirFD,
|
|
Program: prog,
|
|
Attach: ebpf.AttachCGroupDevice,
|
|
Flags: unix.BPF_F_ALLOW_MULTI,
|
|
})
|
|
if err != nil {
|
|
return nilCloser, fmt.Errorf("failed to call BPF_PROG_ATTACH (BPF_CGROUP_DEVICE, BPF_F_ALLOW_MULTI): %w", err)
|
|
}
|
|
closer := func() error {
|
|
err = link.RawDetachProgram(link.RawDetachProgramOptions{
|
|
Target: dirFD,
|
|
Program: prog,
|
|
Attach: ebpf.AttachCGroupDevice,
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to call BPF_PROG_DETACH (BPF_CGROUP_DEVICE): %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
return closer, nil
|
|
}
|
|
|
|
func isRWM(cgroupPermissions string) bool {
|
|
r := false
|
|
w := false
|
|
m := false
|
|
for _, rn := range cgroupPermissions {
|
|
switch rn {
|
|
case 'r':
|
|
r = true
|
|
case 'w':
|
|
w = true
|
|
case 'm':
|
|
m = true
|
|
}
|
|
}
|
|
return r && w && m
|
|
}
|
|
|
|
// the logic is from runc
|
|
// https://github.com/opencontainers/runc/blob/master/libcontainer/cgroups/fs/devices_v2.go#L44
|
|
func canSkipEBPFError(devices []specs.LinuxDeviceCgroup) bool {
|
|
for _, dev := range devices {
|
|
if dev.Allow || !isRWM(dev.Access) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|