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-rw-r--r--pkg/abi/linux/BUILD4
-rw-r--r--pkg/abi/linux/elf.go3
-rw-r--r--pkg/abi/linux/epoll.go12
-rw-r--r--pkg/abi/linux/epoll_amd64.go27
-rw-r--r--pkg/abi/linux/epoll_arm64.go26
-rw-r--r--pkg/abi/linux/file.go10
-rw-r--r--pkg/abi/linux/file_amd64.go4
-rw-r--r--pkg/abi/linux/file_arm64.go4
-rw-r--r--pkg/abi/linux/fs.go2
-rw-r--r--pkg/abi/linux/ioctl.go26
-rw-r--r--pkg/abi/linux/ioctl_tun.go29
-rw-r--r--pkg/abi/linux/netfilter.go118
-rw-r--r--pkg/abi/linux/netfilter_test.go1
-rw-r--r--pkg/abi/linux/signal.go2
-rw-r--r--pkg/abi/linux/socket.go13
-rw-r--r--pkg/abi/linux/time.go8
-rw-r--r--pkg/abi/linux/xattr.go1
17 files changed, 280 insertions, 10 deletions
diff --git a/pkg/abi/linux/BUILD b/pkg/abi/linux/BUILD
index 1f3c0c687..322d1ccc4 100644
--- a/pkg/abi/linux/BUILD
+++ b/pkg/abi/linux/BUILD
@@ -17,6 +17,8 @@ go_library(
"dev.go",
"elf.go",
"epoll.go",
+ "epoll_amd64.go",
+ "epoll_arm64.go",
"errors.go",
"eventfd.go",
"exec.go",
@@ -28,6 +30,7 @@ go_library(
"futex.go",
"inotify.go",
"ioctl.go",
+ "ioctl_tun.go",
"ip.go",
"ipc.go",
"limits.go",
@@ -59,6 +62,7 @@ go_library(
"wait.go",
"xattr.go",
],
+ marshal = True,
visibility = ["//visibility:public"],
deps = [
"//pkg/abi",
diff --git a/pkg/abi/linux/elf.go b/pkg/abi/linux/elf.go
index 40f0459a0..7c9a02f20 100644
--- a/pkg/abi/linux/elf.go
+++ b/pkg/abi/linux/elf.go
@@ -102,4 +102,7 @@ const (
// NT_X86_XSTATE is for x86 extended state using xsave.
NT_X86_XSTATE = 0x202
+
+ // NT_ARM_TLS is for ARM TLS register.
+ NT_ARM_TLS = 0x401
)
diff --git a/pkg/abi/linux/epoll.go b/pkg/abi/linux/epoll.go
index 0e881aa3c..1121a1a92 100644
--- a/pkg/abi/linux/epoll.go
+++ b/pkg/abi/linux/epoll.go
@@ -14,12 +14,9 @@
package linux
-// EpollEvent is equivalent to struct epoll_event from epoll(2).
-type EpollEvent struct {
- Events uint32
- Fd int32
- Data int32
-}
+import (
+ "gvisor.dev/gvisor/pkg/binary"
+)
// Event masks.
const (
@@ -60,3 +57,6 @@ const (
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
)
+
+// SizeOfEpollEvent is the size of EpollEvent struct.
+var SizeOfEpollEvent = int(binary.Size(EpollEvent{}))
diff --git a/pkg/abi/linux/epoll_amd64.go b/pkg/abi/linux/epoll_amd64.go
new file mode 100644
index 000000000..34ff18009
--- /dev/null
+++ b/pkg/abi/linux/epoll_amd64.go
@@ -0,0 +1,27 @@
+// Copyright 2019 The gVisor 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 linux
+
+// EpollEvent is equivalent to struct epoll_event from epoll(2).
+//
+// +marshal
+type EpollEvent struct {
+ Events uint32
+ // Linux makes struct epoll_event::data a __u64. We represent it as
+ // [2]int32 because, on amd64, Linux also makes struct epoll_event
+ // __attribute__((packed)), such that there is no padding between Events
+ // and Data.
+ Data [2]int32
+}
diff --git a/pkg/abi/linux/epoll_arm64.go b/pkg/abi/linux/epoll_arm64.go
new file mode 100644
index 000000000..f86c35329
--- /dev/null
+++ b/pkg/abi/linux/epoll_arm64.go
@@ -0,0 +1,26 @@
+// Copyright 2020 The gVisor 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 linux
+
+// EpollEvent is equivalent to struct epoll_event from epoll(2).
+//
+// +marshal
+type EpollEvent struct {
+ Events uint32
+ // Linux makes struct epoll_event a __u64, necessitating 4 bytes of padding
+ // here.
+ _ int32
+ Data [2]int32
+}
diff --git a/pkg/abi/linux/file.go b/pkg/abi/linux/file.go
index c3ab15a4f..055ac1d7c 100644
--- a/pkg/abi/linux/file.go
+++ b/pkg/abi/linux/file.go
@@ -241,6 +241,8 @@ const (
)
// Statx represents struct statx.
+//
+// +marshal
type Statx struct {
Mask uint32
Blksize uint32
@@ -264,6 +266,9 @@ type Statx struct {
DevMinor uint32
}
+// SizeOfStatx is the size of a Statx struct.
+var SizeOfStatx = binary.Size(Statx{})
+
// FileMode represents a mode_t.
type FileMode uint16
@@ -282,6 +287,11 @@ func (m FileMode) ExtraBits() FileMode {
return m &^ (PermissionsMask | FileTypeMask)
}
+// IsDir returns true if file type represents a directory.
+func (m FileMode) IsDir() bool {
+ return m.FileType() == S_IFDIR
+}
+
// String returns a string representation of m.
func (m FileMode) String() string {
var s []string
diff --git a/pkg/abi/linux/file_amd64.go b/pkg/abi/linux/file_amd64.go
index 9d307e840..6b72364ea 100644
--- a/pkg/abi/linux/file_amd64.go
+++ b/pkg/abi/linux/file_amd64.go
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// +build amd64
+
package linux
// Constants for open(2).
@@ -23,6 +25,8 @@ const (
)
// Stat represents struct stat.
+//
+// +marshal
type Stat struct {
Dev uint64
Ino uint64
diff --git a/pkg/abi/linux/file_arm64.go b/pkg/abi/linux/file_arm64.go
index 26a54f416..6492c9038 100644
--- a/pkg/abi/linux/file_arm64.go
+++ b/pkg/abi/linux/file_arm64.go
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// +build arm64
+
package linux
// Constants for open(2).
@@ -23,6 +25,8 @@ const (
)
// Stat represents struct stat.
+//
+// +marshal
type Stat struct {
Dev uint64
Ino uint64
diff --git a/pkg/abi/linux/fs.go b/pkg/abi/linux/fs.go
index 2c652baa2..158d2db5b 100644
--- a/pkg/abi/linux/fs.go
+++ b/pkg/abi/linux/fs.go
@@ -38,6 +38,8 @@ const (
)
// Statfs is struct statfs, from uapi/asm-generic/statfs.h.
+//
+// +marshal
type Statfs struct {
// Type is one of the filesystem magic values, defined above.
Type uint64
diff --git a/pkg/abi/linux/ioctl.go b/pkg/abi/linux/ioctl.go
index 0e18db9ef..2062e6a4b 100644
--- a/pkg/abi/linux/ioctl.go
+++ b/pkg/abi/linux/ioctl.go
@@ -72,3 +72,29 @@ const (
SIOCGMIIPHY = 0x8947
SIOCGMIIREG = 0x8948
)
+
+// ioctl(2) directions. Used to calculate requests number.
+// Constants from asm-generic/ioctl.h.
+const (
+ _IOC_NONE = 0
+ _IOC_WRITE = 1
+ _IOC_READ = 2
+)
+
+// Constants from asm-generic/ioctl.h.
+const (
+ _IOC_NRBITS = 8
+ _IOC_TYPEBITS = 8
+ _IOC_SIZEBITS = 14
+ _IOC_DIRBITS = 2
+
+ _IOC_NRSHIFT = 0
+ _IOC_TYPESHIFT = _IOC_NRSHIFT + _IOC_NRBITS
+ _IOC_SIZESHIFT = _IOC_TYPESHIFT + _IOC_TYPEBITS
+ _IOC_DIRSHIFT = _IOC_SIZESHIFT + _IOC_SIZEBITS
+)
+
+// IOC outputs the result of _IOC macro in asm-generic/ioctl.h.
+func IOC(dir, typ, nr, size uint32) uint32 {
+ return uint32(dir)<<_IOC_DIRSHIFT | typ<<_IOC_TYPESHIFT | nr<<_IOC_NRSHIFT | size<<_IOC_SIZESHIFT
+}
diff --git a/pkg/abi/linux/ioctl_tun.go b/pkg/abi/linux/ioctl_tun.go
new file mode 100644
index 000000000..c59c9c136
--- /dev/null
+++ b/pkg/abi/linux/ioctl_tun.go
@@ -0,0 +1,29 @@
+// Copyright 2020 The gVisor 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 linux
+
+// ioctl(2) request numbers from linux/if_tun.h
+var (
+ TUNSETIFF = IOC(_IOC_WRITE, 'T', 202, 4)
+ TUNGETIFF = IOC(_IOC_READ, 'T', 210, 4)
+)
+
+// Flags from net/if_tun.h
+const (
+ IFF_TUN = 0x0001
+ IFF_TAP = 0x0002
+ IFF_NO_PI = 0x1000
+ IFF_NOFILTER = 0x1000
+)
diff --git a/pkg/abi/linux/netfilter.go b/pkg/abi/linux/netfilter.go
index bbc4df74c..a8d4f9d69 100644
--- a/pkg/abi/linux/netfilter.go
+++ b/pkg/abi/linux/netfilter.go
@@ -158,10 +158,32 @@ type IPTIP struct {
// Flags define matching behavior for the IP header.
Flags uint8
- // InverseFlags invert the meaning of fields in struct IPTIP.
+ // InverseFlags invert the meaning of fields in struct IPTIP. See the
+ // IPT_INV_* flags.
InverseFlags uint8
}
+// Flags in IPTIP.InverseFlags. Corresponding constants are in
+// include/uapi/linux/netfilter_ipv4/ip_tables.h.
+const (
+ // Invert the meaning of InputInterface.
+ IPT_INV_VIA_IN = 0x01
+ // Invert the meaning of OutputInterface.
+ IPT_INV_VIA_OUT = 0x02
+ // Unclear what this is, as no references to it exist in the kernel.
+ IPT_INV_TOS = 0x04
+ // Invert the meaning of Src.
+ IPT_INV_SRCIP = 0x08
+ // Invert the meaning of Dst.
+ IPT_INV_DSTIP = 0x10
+ // Invert the meaning of the IPT_F_FRAG flag.
+ IPT_INV_FRAG = 0x20
+ // Invert the meaning of the Protocol field.
+ IPT_INV_PROTO = 0x40
+ // Enable all flags.
+ IPT_INV_MASK = 0x7F
+)
+
// SizeOfIPTIP is the size of an IPTIP.
const SizeOfIPTIP = 84
@@ -225,11 +247,14 @@ type XTEntryTarget struct {
// SizeOfXTEntryTarget is the size of an XTEntryTarget.
const SizeOfXTEntryTarget = 32
-// XTStandardTarget is a builtin target, one of ACCEPT, DROP, JUMP, QUEUE, or
-// RETURN. It corresponds to struct xt_standard_target in
+// XTStandardTarget is a built-in target, one of ACCEPT, DROP, JUMP, QUEUE,
+// RETURN, or jump. It corresponds to struct xt_standard_target in
// include/uapi/linux/netfilter/x_tables.h.
type XTStandardTarget struct {
- Target XTEntryTarget
+ Target XTEntryTarget
+ // A positive verdict indicates a jump, and is the offset from the
+ // start of the table to jump to. A negative value means one of the
+ // other built-in targets.
Verdict int32
_ [4]byte
}
@@ -250,6 +275,50 @@ type XTErrorTarget struct {
// SizeOfXTErrorTarget is the size of an XTErrorTarget.
const SizeOfXTErrorTarget = 64
+// Flag values for NfNATIPV4Range. The values indicate whether to map
+// protocol specific part(ports) or IPs. It corresponds to values in
+// include/uapi/linux/netfilter/nf_nat.h.
+const (
+ NF_NAT_RANGE_MAP_IPS = 1 << 0
+ NF_NAT_RANGE_PROTO_SPECIFIED = 1 << 1
+ NF_NAT_RANGE_PROTO_RANDOM = 1 << 2
+ NF_NAT_RANGE_PERSISTENT = 1 << 3
+ NF_NAT_RANGE_PROTO_RANDOM_FULLY = 1 << 4
+ NF_NAT_RANGE_PROTO_RANDOM_ALL = (NF_NAT_RANGE_PROTO_RANDOM | NF_NAT_RANGE_PROTO_RANDOM_FULLY)
+ NF_NAT_RANGE_MASK = (NF_NAT_RANGE_MAP_IPS |
+ NF_NAT_RANGE_PROTO_SPECIFIED | NF_NAT_RANGE_PROTO_RANDOM |
+ NF_NAT_RANGE_PERSISTENT | NF_NAT_RANGE_PROTO_RANDOM_FULLY)
+)
+
+// NfNATIPV4Range corresponds to struct nf_nat_ipv4_range
+// in include/uapi/linux/netfilter/nf_nat.h. The fields are in
+// network byte order.
+type NfNATIPV4Range struct {
+ Flags uint32
+ MinIP [4]byte
+ MaxIP [4]byte
+ MinPort uint16
+ MaxPort uint16
+}
+
+// NfNATIPV4MultiRangeCompat corresponds to struct
+// nf_nat_ipv4_multi_range_compat in include/uapi/linux/netfilter/nf_nat.h.
+type NfNATIPV4MultiRangeCompat struct {
+ RangeSize uint32
+ RangeIPV4 NfNATIPV4Range
+}
+
+// XTRedirectTarget triggers a redirect when reached.
+// Adding 4 bytes of padding to make the struct 8 byte aligned.
+type XTRedirectTarget struct {
+ Target XTEntryTarget
+ NfRange NfNATIPV4MultiRangeCompat
+ _ [4]byte
+}
+
+// SizeOfXTRedirectTarget is the size of an XTRedirectTarget.
+const SizeOfXTRedirectTarget = 56
+
// IPTGetinfo is the argument for the IPT_SO_GET_INFO sockopt. It corresponds
// to struct ipt_getinfo in include/uapi/linux/netfilter_ipv4/ip_tables.h.
type IPTGetinfo struct {
@@ -440,3 +509,44 @@ const (
// Enable all flags.
XT_UDP_INV_MASK = 0x03
)
+
+// IPTOwnerInfo holds data for matching packets with owner. It corresponds
+// to struct ipt_owner_info in libxt_owner.c of iptables binary.
+type IPTOwnerInfo struct {
+ // UID is user id which created the packet.
+ UID uint32
+
+ // GID is group id which created the packet.
+ GID uint32
+
+ // PID is process id of the process which created the packet.
+ PID uint32
+
+ // SID is session id which created the packet.
+ SID uint32
+
+ // Comm is the command name which created the packet.
+ Comm [16]byte
+
+ // Match is used to match UID/GID of the socket. See the
+ // XT_OWNER_* flags below.
+ Match uint8
+
+ // Invert flips the meaning of Match field.
+ Invert uint8
+}
+
+// SizeOfIPTOwnerInfo is the size of an XTOwnerMatchInfo.
+const SizeOfIPTOwnerInfo = 34
+
+// Flags in IPTOwnerInfo.Match. Corresponding constants are in
+// include/uapi/linux/netfilter/xt_owner.h.
+const (
+ // Match the UID of the packet.
+ XT_OWNER_UID = 1 << 0
+ // Match the GID of the packet.
+ XT_OWNER_GID = 1 << 1
+ // Match if the socket exists for the packet. Forwarded
+ // packets do not have an associated socket.
+ XT_OWNER_SOCKET = 1 << 2
+)
diff --git a/pkg/abi/linux/netfilter_test.go b/pkg/abi/linux/netfilter_test.go
index 21e237f92..565dd550e 100644
--- a/pkg/abi/linux/netfilter_test.go
+++ b/pkg/abi/linux/netfilter_test.go
@@ -29,6 +29,7 @@ func TestSizes(t *testing.T) {
{IPTGetEntries{}, SizeOfIPTGetEntries},
{IPTGetinfo{}, SizeOfIPTGetinfo},
{IPTIP{}, SizeOfIPTIP},
+ {IPTOwnerInfo{}, SizeOfIPTOwnerInfo},
{IPTReplace{}, SizeOfIPTReplace},
{XTCounters{}, SizeOfXTCounters},
{XTEntryMatch{}, SizeOfXTEntryMatch},
diff --git a/pkg/abi/linux/signal.go b/pkg/abi/linux/signal.go
index c69b04ea9..1c330e763 100644
--- a/pkg/abi/linux/signal.go
+++ b/pkg/abi/linux/signal.go
@@ -115,6 +115,8 @@ const (
)
// SignalSet is a signal mask with a bit corresponding to each signal.
+//
+// +marshal
type SignalSet uint64
// SignalSetSize is the size in bytes of a SignalSet.
diff --git a/pkg/abi/linux/socket.go b/pkg/abi/linux/socket.go
index 766ee4014..4a14ef691 100644
--- a/pkg/abi/linux/socket.go
+++ b/pkg/abi/linux/socket.go
@@ -411,6 +411,15 @@ type ControlMessageCredentials struct {
GID uint32
}
+// A ControlMessageIPPacketInfo is IP_PKTINFO socket control message.
+//
+// ControlMessageIPPacketInfo represents struct in_pktinfo from linux/in.h.
+type ControlMessageIPPacketInfo struct {
+ NIC int32
+ LocalAddr InetAddr
+ DestinationAddr InetAddr
+}
+
// SizeOfControlMessageCredentials is the binary size of a
// ControlMessageCredentials struct.
var SizeOfControlMessageCredentials = int(binary.Size(ControlMessageCredentials{}))
@@ -431,6 +440,10 @@ const SizeOfControlMessageTOS = 1
// SizeOfControlMessageTClass is the size of an IPV6_TCLASS control message.
const SizeOfControlMessageTClass = 4
+// SizeOfControlMessageIPPacketInfo is the size of an IP_PKTINFO
+// control message.
+const SizeOfControlMessageIPPacketInfo = 12
+
// SCM_MAX_FD is the maximum number of FDs accepted in a single sendmsg call.
// From net/scm.h.
const SCM_MAX_FD = 253
diff --git a/pkg/abi/linux/time.go b/pkg/abi/linux/time.go
index 5c5a58cd4..e6860ed49 100644
--- a/pkg/abi/linux/time.go
+++ b/pkg/abi/linux/time.go
@@ -101,6 +101,8 @@ func NsecToTimeT(nsec int64) TimeT {
}
// Timespec represents struct timespec in <time.h>.
+//
+// +marshal
type Timespec struct {
Sec int64
Nsec int64
@@ -155,6 +157,8 @@ func DurationToTimespec(dur time.Duration) Timespec {
const SizeOfTimeval = 16
// Timeval represents struct timeval in <time.h>.
+//
+// +marshal
type Timeval struct {
Sec int64
Usec int64
@@ -228,6 +232,8 @@ type Tms struct {
type TimerID int32
// StatxTimestamp represents struct statx_timestamp.
+//
+// +marshal
type StatxTimestamp struct {
Sec int64
Nsec uint32
@@ -256,6 +262,8 @@ func NsecToStatxTimestamp(nsec int64) (ts StatxTimestamp) {
}
// Utime represents struct utimbuf used by utimes(2).
+//
+// +marshal
type Utime struct {
Actime int64
Modtime int64
diff --git a/pkg/abi/linux/xattr.go b/pkg/abi/linux/xattr.go
index a3b6406fa..99180b208 100644
--- a/pkg/abi/linux/xattr.go
+++ b/pkg/abi/linux/xattr.go
@@ -18,6 +18,7 @@ package linux
const (
XATTR_NAME_MAX = 255
XATTR_SIZE_MAX = 65536
+ XATTR_LIST_MAX = 65536
XATTR_CREATE = 1
XATTR_REPLACE = 2
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 11:19:15 +0000