nri: add experimental NRI plugin.

Add a common NRI 'service' plugin. It takes care of relaying
requests and respones to and from NRI (external NRI plugins)
and the high-level containerd namespace-independent logic of
applying NRI container adjustments and updates to actual CRI
and other containers.

The namespace-dependent details of the necessary container
manipulation operations are to be implemented by namespace-
specific adaptations. This NRI plugin defines the API which
such adaptations need to implement.

Signed-off-by: Krisztian Litkey <krisztian.litkey@intel.com>

vendor/github.com/opencontainers/runtime-tools/generate/seccomp/consts.go

@@ -4,9 +4,4 @@ const (
 	seccompOverwrite = "overwrite"
 	seccompAppend    = "append"
 	nothing          = "nothing"
-	kill             = "kill"
-	trap             = "trap"
-	trace            = "trace"
-	allow            = "allow"
-	errno            = "errno"
 )

vendor/github.com/opencontainers/runtime-tools/generate/seccomp/seccomp_default.go

@@ -151,6 +151,9 @@ func DefaultProfile(rs *specs.Spec) *rspec.LinuxSeccomp {
 				"io_submit",
 				"ipc",
 				"kill",
+				"landlock_add_rule",
+				"landlock_create_ruleset",
+				"landlock_restrict_self",
 				"lchown",
 				"lchown32",
 				"lgetxattr",
@@ -303,6 +306,7 @@ func DefaultProfile(rs *specs.Spec) *rspec.LinuxSeccomp {
 				"stat64",
 				"statfs",
 				"statfs64",
+				"statx",
 				"symlink",
 				"symlinkat",
 				"sync",
@@ -353,11 +357,23 @@ func DefaultProfile(rs *specs.Spec) *rspec.LinuxSeccomp {
 					Value: 0x0,
 					Op:    rspec.OpEqualTo,
 				},
+			},
+		},
+		{
+			Names:  []string{"personality"},
+			Action: rspec.ActAllow,
+			Args: []rspec.LinuxSeccompArg{
 				{
 					Index: 0,
 					Value: 0x0008,
 					Op:    rspec.OpEqualTo,
 				},
+			},
+		},
+		{
+			Names:  []string{"personality"},
+			Action: rspec.ActAllow,
+			Args: []rspec.LinuxSeccompArg{
 				{
 					Index: 0,
 					Value: 0xffffffff,
@@ -512,7 +528,7 @@ func DefaultProfile(rs *specs.Spec) *rspec.LinuxSeccomp {
 				Args: []rspec.LinuxSeccompArg{
 					{
 						Index:    sysCloneFlagsIndex,
-						Value:    CloneNewNS | CloneNewUTS | CloneNewIPC | CloneNewUser | CloneNewPID | CloneNewNet,
+						Value:    CloneNewNS | CloneNewUTS | CloneNewIPC | CloneNewUser | CloneNewPID | CloneNewNet | CloneNewCgroup,
 						ValueTwo: 0,
 						Op:       rspec.OpMaskedEqual,
 					},
@@ -566,6 +582,20 @@ func DefaultProfile(rs *specs.Spec) *rspec.LinuxSeccomp {
 			},
 		}...)
 		/* Flags parameter of the clone syscall is the 2nd on s390 */
+		syscalls = append(syscalls, []rspec.LinuxSyscall{
+			{
+				Names:  []string{"clone"},
+				Action: rspec.ActAllow,
+				Args: []rspec.LinuxSeccompArg{
+					{
+						Index:    1,
+						Value:    2080505856,
+						ValueTwo: 0,
+						Op:       rspec.OpMaskedEqual,
+					},
+				},
+			},
+		}...)
 	}
 
 	return &rspec.LinuxSeccomp{

vendor/github.com/opencontainers/runtime-tools/generate/seccomp/seccomp_default_linux.go

@@ -1,15 +1,17 @@
+//go:build linux
 // +build linux
 
 package seccomp
 
-import "syscall"
+import "golang.org/x/sys/unix"
 
 // System values passed through on linux
 const (
-	CloneNewIPC  = syscall.CLONE_NEWIPC
-	CloneNewNet  = syscall.CLONE_NEWNET
-	CloneNewNS   = syscall.CLONE_NEWNS
-	CloneNewPID  = syscall.CLONE_NEWPID
-	CloneNewUser = syscall.CLONE_NEWUSER
-	CloneNewUTS  = syscall.CLONE_NEWUTS
+	CloneNewIPC    = unix.CLONE_NEWIPC
+	CloneNewNet    = unix.CLONE_NEWNET
+	CloneNewNS     = unix.CLONE_NEWNS
+	CloneNewPID    = unix.CLONE_NEWPID
+	CloneNewUser   = unix.CLONE_NEWUSER
+	CloneNewUTS    = unix.CLONE_NEWUTS
+	CloneNewCgroup = unix.CLONE_NEWCGROUP
 )

vendor/github.com/opencontainers/runtime-tools/generate/seccomp/seccomp_default_unsupported.go

@@ -1,3 +1,4 @@
+//go:build !linux
 // +build !linux
 
 package seccomp

vendor/github.com/opencontainers/runtime-tools/generate/seccomp/syscall_compare.go

@@ -92,22 +92,6 @@ func identical(config1, config2 *rspec.LinuxSyscall) bool {
 	return reflect.DeepEqual(config1, config2)
 }
 
-func identicalExceptAction(config1, config2 *rspec.LinuxSyscall) bool {
-	samename := sameName(config1, config2)
-	sameAction := sameAction(config1, config2)
-	sameArgs := sameArgs(config1, config2)
-
-	return samename && !sameAction && sameArgs
-}
-
-func identicalExceptArgs(config1, config2 *rspec.LinuxSyscall) bool {
-	samename := sameName(config1, config2)
-	sameAction := sameAction(config1, config2)
-	sameArgs := sameArgs(config1, config2)
-
-	return samename && sameAction && !sameArgs
-}
-
 func sameName(config1, config2 *rspec.LinuxSyscall) bool {
 	return reflect.DeepEqual(config1.Names, config2.Names)
 }