summaryrefslogtreecommitdiffhomepage
path: root/pkg
diff options
context:
space:
mode:
Diffstat (limited to 'pkg')
-rwxr-xr-xpkg/abi/linux/linux_abi_autogen_unsafe.go92
-rw-r--r--pkg/abi/linux/mm.go17
-rw-r--r--pkg/sentry/kernel/task.go2
-rw-r--r--pkg/sentry/kernel/task_sched.go4
-rw-r--r--pkg/sentry/mm/mm.go3
-rw-r--r--pkg/sentry/mm/syscalls.go4
-rw-r--r--pkg/sentry/syscalls/linux/sys_mempolicy.go18
7 files changed, 118 insertions, 22 deletions
diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index ac6932361..ba13aef11 100755
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -14,6 +14,7 @@ import (
)
// Marshallable types used by this file.
+var _ marshal.Marshallable = (*NumaPolicy)(nil)
var _ marshal.Marshallable = (*RSeqCriticalSection)(nil)
var _ marshal.Marshallable = (*SignalSet)(nil)
var _ marshal.Marshallable = (*Statfs)(nil)
@@ -137,7 +138,7 @@ func (s *Statx) MarshalUnsafe(dst []byte) {
// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (s *Statx) UnmarshalUnsafe(src []byte) {
- if s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() {
+ if s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
safecopy.CopyOut(unsafe.Pointer(s), src)
} else {
s.UnmarshalBytes(src)
@@ -369,6 +370,95 @@ func (s *Statfs) WriteTo(w io.Writer) (int64, error) {
}
// SizeBytes implements marshal.Marshallable.SizeBytes.
+//go:nosplit
+func (n *NumaPolicy) SizeBytes() int {
+ return 4
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (n *NumaPolicy) MarshalBytes(dst []byte) {
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(*n))
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (n *NumaPolicy) UnmarshalBytes(src []byte) {
+ *n = NumaPolicy(int32(usermem.ByteOrder.Uint32(src[:4])))
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (n *NumaPolicy) Packed() bool {
+ // Scalar newtypes are always packed.
+ return true
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (n *NumaPolicy) MarshalUnsafe(dst []byte) {
+ safecopy.CopyIn(dst, unsafe.Pointer(n))
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (n *NumaPolicy) UnmarshalUnsafe(src []byte) {
+ safecopy.CopyOut(unsafe.Pointer(n), src)
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (n *NumaPolicy) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(n)))
+ hdr.Len = n.SizeBytes()
+ hdr.Cap = n.SizeBytes()
+
+ length, err := task.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that n
+ // must live until the use above.
+ runtime.KeepAlive(n)
+ return length, err
+}
+
+// CopyOut implements marshal.Marshallable.CopyOut.
+//go:nosplit
+func (n *NumaPolicy) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
+ return n.CopyOutN(task, addr, n.SizeBytes())
+}
+
+// CopyIn implements marshal.Marshallable.CopyIn.
+//go:nosplit
+func (n *NumaPolicy) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(n)))
+ hdr.Len = n.SizeBytes()
+ hdr.Cap = n.SizeBytes()
+
+ length, err := task.CopyInBytes(addr, buf) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that n
+ // must live until the use above.
+ runtime.KeepAlive(n)
+ return length, err
+}
+
+// WriteTo implements io.WriterTo.WriteTo.
+func (n *NumaPolicy) WriteTo(w io.Writer) (int64, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(n)))
+ hdr.Len = n.SizeBytes()
+ hdr.Cap = n.SizeBytes()
+
+ length, err := w.Write(buf)
+ // Since we bypassed the compiler's escape analysis, indicate that n
+ // must live until the use above.
+ runtime.KeepAlive(n)
+ return int64(length), err
+}
+
+// SizeBytes implements marshal.Marshallable.SizeBytes.
func (r *RSeqCriticalSection) SizeBytes() int {
return 32
}
diff --git a/pkg/abi/linux/mm.go b/pkg/abi/linux/mm.go
index cd043dac3..07cc1895e 100644
--- a/pkg/abi/linux/mm.go
+++ b/pkg/abi/linux/mm.go
@@ -90,14 +90,19 @@ const (
MS_SYNC = 1 << 2
)
+// NumaPolicy is the NUMA memory policy for a memory range. See numa(7).
+//
+// +marshal
+type NumaPolicy int32
+
// Policies for get_mempolicy(2)/set_mempolicy(2).
const (
- MPOL_DEFAULT = 0
- MPOL_PREFERRED = 1
- MPOL_BIND = 2
- MPOL_INTERLEAVE = 3
- MPOL_LOCAL = 4
- MPOL_MAX = 5
+ MPOL_DEFAULT NumaPolicy = 0
+ MPOL_PREFERRED NumaPolicy = 1
+ MPOL_BIND NumaPolicy = 2
+ MPOL_INTERLEAVE NumaPolicy = 3
+ MPOL_LOCAL NumaPolicy = 4
+ MPOL_MAX NumaPolicy = 5
)
// Flags for get_mempolicy(2).
diff --git a/pkg/sentry/kernel/task.go b/pkg/sentry/kernel/task.go
index e5d133d6c..f48247c94 100644
--- a/pkg/sentry/kernel/task.go
+++ b/pkg/sentry/kernel/task.go
@@ -484,7 +484,7 @@ type Task struct {
// bit.
//
// numaPolicy and numaNodeMask are protected by mu.
- numaPolicy int32
+ numaPolicy linux.NumaPolicy
numaNodeMask uint64
// netns is the task's network namespace. netns is never nil.
diff --git a/pkg/sentry/kernel/task_sched.go b/pkg/sentry/kernel/task_sched.go
index 8b148db35..09366b60c 100644
--- a/pkg/sentry/kernel/task_sched.go
+++ b/pkg/sentry/kernel/task_sched.go
@@ -653,14 +653,14 @@ func (t *Task) SetNiceness(n int) {
}
// NumaPolicy returns t's current numa policy.
-func (t *Task) NumaPolicy() (policy int32, nodeMask uint64) {
+func (t *Task) NumaPolicy() (policy linux.NumaPolicy, nodeMask uint64) {
t.mu.Lock()
defer t.mu.Unlock()
return t.numaPolicy, t.numaNodeMask
}
// SetNumaPolicy sets t's numa policy.
-func (t *Task) SetNumaPolicy(policy int32, nodeMask uint64) {
+func (t *Task) SetNumaPolicy(policy linux.NumaPolicy, nodeMask uint64) {
t.mu.Lock()
defer t.mu.Unlock()
t.numaPolicy = policy
diff --git a/pkg/sentry/mm/mm.go b/pkg/sentry/mm/mm.go
index 34d3bde7a..6db7c3d40 100644
--- a/pkg/sentry/mm/mm.go
+++ b/pkg/sentry/mm/mm.go
@@ -35,6 +35,7 @@
package mm
import (
+ "gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/safemem"
"gvisor.dev/gvisor/pkg/sentry/arch"
"gvisor.dev/gvisor/pkg/sentry/fsbridge"
@@ -286,7 +287,7 @@ type vma struct {
mlockMode memmap.MLockMode
// numaPolicy is the NUMA policy for this vma set by mbind().
- numaPolicy int32
+ numaPolicy linux.NumaPolicy
// numaNodemask is the NUMA nodemask for this vma set by mbind().
numaNodemask uint64
diff --git a/pkg/sentry/mm/syscalls.go b/pkg/sentry/mm/syscalls.go
index c5dfa5972..3f496aa9f 100644
--- a/pkg/sentry/mm/syscalls.go
+++ b/pkg/sentry/mm/syscalls.go
@@ -974,7 +974,7 @@ func (mm *MemoryManager) MLockAll(ctx context.Context, opts MLockAllOpts) error
}
// NumaPolicy implements the semantics of Linux's get_mempolicy(MPOL_F_ADDR).
-func (mm *MemoryManager) NumaPolicy(addr usermem.Addr) (int32, uint64, error) {
+func (mm *MemoryManager) NumaPolicy(addr usermem.Addr) (linux.NumaPolicy, uint64, error) {
mm.mappingMu.RLock()
defer mm.mappingMu.RUnlock()
vseg := mm.vmas.FindSegment(addr)
@@ -986,7 +986,7 @@ func (mm *MemoryManager) NumaPolicy(addr usermem.Addr) (int32, uint64, error) {
}
// SetNumaPolicy implements the semantics of Linux's mbind().
-func (mm *MemoryManager) SetNumaPolicy(addr usermem.Addr, length uint64, policy int32, nodemask uint64) error {
+func (mm *MemoryManager) SetNumaPolicy(addr usermem.Addr, length uint64, policy linux.NumaPolicy, nodemask uint64) error {
if !addr.IsPageAligned() {
return syserror.EINVAL
}
diff --git a/pkg/sentry/syscalls/linux/sys_mempolicy.go b/pkg/sentry/syscalls/linux/sys_mempolicy.go
index ac934dc6f..9b4a5c3f1 100644
--- a/pkg/sentry/syscalls/linux/sys_mempolicy.go
+++ b/pkg/sentry/syscalls/linux/sys_mempolicy.go
@@ -162,10 +162,10 @@ func GetMempolicy(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.
if err != nil {
return 0, nil, err
}
- policy = 0 // maxNodes == 1
+ policy = linux.MPOL_DEFAULT // maxNodes == 1
}
if mode != 0 {
- if _, err := t.CopyOut(mode, policy); err != nil {
+ if _, err := policy.CopyOut(t, mode); err != nil {
return 0, nil, err
}
}
@@ -199,10 +199,10 @@ func GetMempolicy(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.
if policy&^linux.MPOL_MODE_FLAGS != linux.MPOL_INTERLEAVE {
return 0, nil, syserror.EINVAL
}
- policy = 0 // maxNodes == 1
+ policy = linux.MPOL_DEFAULT // maxNodes == 1
}
if mode != 0 {
- if _, err := t.CopyOut(mode, policy); err != nil {
+ if _, err := policy.CopyOut(t, mode); err != nil {
return 0, nil, err
}
}
@@ -216,7 +216,7 @@ func GetMempolicy(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.
// SetMempolicy implements the syscall set_mempolicy(2).
func SetMempolicy(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
- modeWithFlags := args[0].Int()
+ modeWithFlags := linux.NumaPolicy(args[0].Int())
nodemask := args[1].Pointer()
maxnode := args[2].Uint()
@@ -233,7 +233,7 @@ func SetMempolicy(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.
func Mbind(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
addr := args[0].Pointer()
length := args[1].Uint64()
- mode := args[2].Int()
+ mode := linux.NumaPolicy(args[2].Int())
nodemask := args[3].Pointer()
maxnode := args[4].Uint()
flags := args[5].Uint()
@@ -258,9 +258,9 @@ func Mbind(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall
return 0, nil, err
}
-func copyInMempolicyNodemask(t *kernel.Task, modeWithFlags int32, nodemask usermem.Addr, maxnode uint32) (int32, uint64, error) {
- flags := modeWithFlags & linux.MPOL_MODE_FLAGS
- mode := modeWithFlags &^ linux.MPOL_MODE_FLAGS
+func copyInMempolicyNodemask(t *kernel.Task, modeWithFlags linux.NumaPolicy, nodemask usermem.Addr, maxnode uint32) (linux.NumaPolicy, uint64, error) {
+ flags := linux.NumaPolicy(modeWithFlags & linux.MPOL_MODE_FLAGS)
+ mode := linux.NumaPolicy(modeWithFlags &^ linux.MPOL_MODE_FLAGS)
if flags == linux.MPOL_MODE_FLAGS {
// Can't specify both mode flags simultaneously.
return 0, 0, syserror.EINVAL
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 09:34:02 +0000