mirror of
https://github.com/hanzoai/visor.git
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Etienne PerotandgVisor bot
da6948a692
This will be used to plumb the syscall number through to a counter metric that exports the number of times an unimplemented syscall has been called. Plenty of syscall implementations call `EmitUnimplementedEvent` for flags and settings that are not implemented. With `sysno` available, they will be able to plumb that bit of information through. PiperOrigin-RevId: 518635831
102 lines
3.1 KiB
Go
102 lines
3.1 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package linux
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import (
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/errors/linuxerr"
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"gvisor.dev/gvisor/pkg/sentry/arch"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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)
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const (
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onlyScheduler = linux.SCHED_NORMAL
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onlyPriority = 0
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)
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// SchedParam replicates struct sched_param in sched.h.
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//
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// +marshal
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type SchedParam struct {
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schedPriority int32
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}
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// SchedGetparam implements linux syscall sched_getparam(2).
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func SchedGetparam(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
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pid := args[0].Int()
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param := args[1].Pointer()
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if param == 0 {
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return 0, nil, linuxerr.EINVAL
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}
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if pid < 0 {
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return 0, nil, linuxerr.EINVAL
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}
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if pid != 0 && t.PIDNamespace().TaskWithID(kernel.ThreadID(pid)) == nil {
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return 0, nil, linuxerr.ESRCH
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}
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r := SchedParam{schedPriority: onlyPriority}
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if _, err := r.CopyOut(t, param); err != nil {
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return 0, nil, err
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}
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return 0, nil, nil
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}
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// SchedGetscheduler implements linux syscall sched_getscheduler(2).
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func SchedGetscheduler(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
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pid := args[0].Int()
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if pid < 0 {
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return 0, nil, linuxerr.EINVAL
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}
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if pid != 0 && t.PIDNamespace().TaskWithID(kernel.ThreadID(pid)) == nil {
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return 0, nil, linuxerr.ESRCH
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}
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return onlyScheduler, nil, nil
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}
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// SchedSetscheduler implements linux syscall sched_setscheduler(2).
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func SchedSetscheduler(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
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pid := args[0].Int()
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policy := args[1].Int()
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param := args[2].Pointer()
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if pid < 0 {
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return 0, nil, linuxerr.EINVAL
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}
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if policy != onlyScheduler {
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return 0, nil, linuxerr.EINVAL
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}
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if pid != 0 && t.PIDNamespace().TaskWithID(kernel.ThreadID(pid)) == nil {
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return 0, nil, linuxerr.ESRCH
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}
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var r SchedParam
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if _, err := r.CopyIn(t, param); err != nil {
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return 0, nil, linuxerr.EINVAL
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}
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if r.schedPriority != onlyPriority {
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return 0, nil, linuxerr.EINVAL
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}
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return 0, nil, nil
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}
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// SchedGetPriorityMax implements linux syscall sched_get_priority_max(2).
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func SchedGetPriorityMax(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
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return onlyPriority, nil, nil
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}
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// SchedGetPriorityMin implements linux syscall sched_get_priority_min(2).
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func SchedGetPriorityMin(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
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return onlyPriority, nil, nil
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}
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