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netlink/bpf_linux.go

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Add BPF TcAction support to U32 filter Current U32 filter only supports redirect action, but the U32 can support a lot more. Refactor a bit the action generating/parsing logic to be more generic and add BPF action support. When creating a U32 filter, one can supply an array of Actions, which will be executed by the U32 filter in order: * The new MirredAction implements the same functionality as RedirIndex field in the U32 filter, with that static field kept in the struct for backwards compatibility. * A new BpfAction type is added which allows a program with an open bpf file descriptor (implementation is out of scope of this patch) to be added as well. Add a test for the above use case which includes one of each type of action.
2016-02-29 07:12:34 +00:00
package netlink
Eliminate cgo from netlink. Signed-off-by: Christopher Koch <chrisko@google.com>
2017-12-15 00:18:32 +00:00
import (
"unsafe"
Add BPF TcAction support to U32 filter Current U32 filter only supports redirect action, but the U32 can support a lot more. Refactor a bit the action generating/parsing logic to be more generic and add BPF action support. When creating a U32 filter, one can supply an array of Actions, which will be executed by the U32 filter in order: * The new MirredAction implements the same functionality as RedirIndex field in the U32 filter, with that static field kept in the struct for backwards compatibility. * A new BpfAction type is added which allows a program with an open bpf file descriptor (implementation is out of scope of this patch) to be added as well. Add a test for the above use case which includes one of each type of action.
2016-02-29 07:12:34 +00:00
Eliminate cgo from netlink. Signed-off-by: Christopher Koch <chrisko@google.com>
2017-12-15 00:18:32 +00:00
"golang.org/x/sys/unix"
)
Add BPF TcAction support to U32 filter Current U32 filter only supports redirect action, but the U32 can support a lot more. Refactor a bit the action generating/parsing logic to be more generic and add BPF action support. When creating a U32 filter, one can supply an array of Actions, which will be executed by the U32 filter in order: * The new MirredAction implements the same functionality as RedirIndex field in the U32 filter, with that static field kept in the struct for backwards compatibility. * A new BpfAction type is added which allows a program with an open bpf file descriptor (implementation is out of scope of this patch) to be added as well. Add a test for the above use case which includes one of each type of action.
2016-02-29 07:12:34 +00:00
Eliminate cgo from netlink. Signed-off-by: Christopher Koch <chrisko@google.com>
2017-12-15 00:18:32 +00:00
type BpfProgType uint32
Add BPF TcAction support to U32 filter Current U32 filter only supports redirect action, but the U32 can support a lot more. Refactor a bit the action generating/parsing logic to be more generic and add BPF action support. When creating a U32 filter, one can supply an array of Actions, which will be executed by the U32 filter in order: * The new MirredAction implements the same functionality as RedirIndex field in the U32 filter, with that static field kept in the struct for backwards compatibility. * A new BpfAction type is added which allows a program with an open bpf file descriptor (implementation is out of scope of this patch) to be added as well. Add a test for the above use case which includes one of each type of action.
2016-02-29 07:12:34 +00:00
const (
BPF_PROG_TYPE_UNSPEC BpfProgType = iota
BPF_PROG_TYPE_SOCKET_FILTER
BPF_PROG_TYPE_KPROBE
BPF_PROG_TYPE_SCHED_CLS
BPF_PROG_TYPE_SCHED_ACT
Add support for xdp set/get of a bpf program (#156) * Add netlink definitions for extra IFLAs The relevant IFLA_* are defined in the kernel but not in the syscall package. * Parameterize the return value of loadSimpleBpf Allow the return value of the bpf program created by loadSimpleBpf to be specified by the caller. Before this, the value was hardcoded to 1. * Add support for a new IFLA that enables using a bpf program as a filter early in the driver path of some NICs. * Add a test for set/get of an xdp program. Since currently, the XDP IFLA is optional, check that the hardware supports it before trying to set the field. Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>
2016-08-25 18:08:23 +00:00
BPF_PROG_TYPE_TRACEPOINT
BPF_PROG_TYPE_XDP
lwtunnel: add support for encap type bpf add bpf program types add unit tests don't use strings to determine type fix camel case
2021-04-19 11:08:44 +00:00
BPF_PROG_TYPE_PERF_EVENT
BPF_PROG_TYPE_CGROUP_SKB
BPF_PROG_TYPE_CGROUP_SOCK
BPF_PROG_TYPE_LWT_IN
BPF_PROG_TYPE_LWT_OUT
BPF_PROG_TYPE_LWT_XMIT
BPF_PROG_TYPE_SOCK_OPS
BPF_PROG_TYPE_SK_SKB
BPF_PROG_TYPE_CGROUP_DEVICE
BPF_PROG_TYPE_SK_MSG
BPF_PROG_TYPE_RAW_TRACEPOINT
BPF_PROG_TYPE_CGROUP_SOCK_ADDR
BPF_PROG_TYPE_LWT_SEG6LOCAL
BPF_PROG_TYPE_LIRC_MODE2
BPF_PROG_TYPE_SK_REUSEPORT
BPF_PROG_TYPE_FLOW_DISSECTOR
BPF_PROG_TYPE_CGROUP_SYSCTL
BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE
BPF_PROG_TYPE_CGROUP_SOCKOPT
BPF_PROG_TYPE_TRACING
BPF_PROG_TYPE_STRUCT_OPS
BPF_PROG_TYPE_EXT
BPF_PROG_TYPE_LSM
BPF_PROG_TYPE_SK_LOOKUP
Add BPF TcAction support to U32 filter Current U32 filter only supports redirect action, but the U32 can support a lot more. Refactor a bit the action generating/parsing logic to be more generic and add BPF action support. When creating a U32 filter, one can supply an array of Actions, which will be executed by the U32 filter in order: * The new MirredAction implements the same functionality as RedirIndex field in the U32 filter, with that static field kept in the struct for backwards compatibility. * A new BpfAction type is added which allows a program with an open bpf file descriptor (implementation is out of scope of this patch) to be added as well. Add a test for the above use case which includes one of each type of action.
2016-02-29 07:12:34 +00:00
)
Eliminate cgo from netlink. Signed-off-by: Christopher Koch <chrisko@google.com>
2017-12-15 00:18:32 +00:00
type BPFAttr struct {
ProgType uint32
InsnCnt uint32
Insns uintptr
License uintptr
LogLevel uint32
LogSize uint32
LogBuf uintptr
KernVersion uint32
}
// loadSimpleBpf loads a trivial bpf program for testing purposes.
func loadSimpleBpf(progType BpfProgType, ret uint32) (int, error) {
insns := []uint64{
0x00000000000000b7 | (uint64(ret) << 32),
0x0000000000000095,
}
license := []byte{'A', 'S', 'L', '2', '\x00'}
attr := BPFAttr{
ProgType: uint32(progType),
InsnCnt: uint32(len(insns)),
Update bpf_linux.go
2018-01-02 18:36:48 +00:00
Insns: uintptr(unsafe.Pointer(&insns[0])),
Eliminate cgo from netlink. Signed-off-by: Christopher Koch <chrisko@google.com>
2017-12-15 00:18:32 +00:00
License: uintptr(unsafe.Pointer(&license[0])),
}
fd, _, errno := unix.Syscall(unix.SYS_BPF,
5, /* bpf cmd */
uintptr(unsafe.Pointer(&attr)),
unsafe.Sizeof(attr))
if errno != 0 {
return 0, errno
}
return int(fd), nil
Add BPF TcAction support to U32 filter Current U32 filter only supports redirect action, but the U32 can support a lot more. Refactor a bit the action generating/parsing logic to be more generic and add BPF action support. When creating a U32 filter, one can supply an array of Actions, which will be executed by the U32 filter in order: * The new MirredAction implements the same functionality as RedirIndex field in the U32 filter, with that static field kept in the struct for backwards compatibility. * A new BpfAction type is added which allows a program with an open bpf file descriptor (implementation is out of scope of this patch) to be added as well. Add a test for the above use case which includes one of each type of action.
2016-02-29 07:12:34 +00:00
}