bpftool: Add support for cgroup unix socket address hooks

Add the necessary plumbing to hook up the new cgroup unix sockaddr
hooks into bpftool.

Signed-off-by: Daan De Meyer <daan.j.demeyer@gmail.com>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/r/20231011185113.140426-7-daan.j.demeyer@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

tools/bpf/bpftool/Documentation/bpftool-cgroup.rst

@@ -36,11 +36,14 @@ CGROUP COMMANDS
 |		**cgroup_device** | **cgroup_inet4_bind** | **cgroup_inet6_bind** |
 |		**cgroup_inet4_post_bind** | **cgroup_inet6_post_bind** |
 |		**cgroup_inet4_connect** | **cgroup_inet6_connect** |
-|		**cgroup_inet4_getpeername** | **cgroup_inet6_getpeername** |
+|		**cgroup_unix_connect** | **cgroup_inet4_getpeername** |
+|		**cgroup_inet6_getpeername** | **cgroup_unix_getpeername** |
 |		**cgroup_inet4_getsockname** | **cgroup_inet6_getsockname** |
-|		**cgroup_udp4_sendmsg** | **cgroup_udp6_sendmsg** |
+|		**cgroup_unix_getsockname** | **cgroup_udp4_sendmsg** |
+|		**cgroup_udp6_sendmsg** | **cgroup_unix_sendmsg** |
 |		**cgroup_udp4_recvmsg** | **cgroup_udp6_recvmsg** |
-|		**cgroup_sysctl** | **cgroup_getsockopt** | **cgroup_setsockopt** |
+|		**cgroup_unix_recvmsg** | **cgroup_sysctl** |
+|		**cgroup_getsockopt** | **cgroup_setsockopt** |
 |		**cgroup_inet_sock_release** }
 |	*ATTACH_FLAGS* := { **multi** | **override** }
 
@@ -102,21 +105,28 @@ DESCRIPTION
 		  **post_bind6** return from bind(2) for an inet6 socket (since 4.17);
 		  **connect4** call to connect(2) for an inet4 socket (since 4.17);
 		  **connect6** call to connect(2) for an inet6 socket (since 4.17);
+		  **connect_unix** call to connect(2) for a unix socket (since 6.7);
 		  **sendmsg4** call to sendto(2), sendmsg(2), sendmmsg(2) for an
 		  unconnected udp4 socket (since 4.18);
 		  **sendmsg6** call to sendto(2), sendmsg(2), sendmmsg(2) for an
 		  unconnected udp6 socket (since 4.18);
+		  **sendmsg_unix** call to sendto(2), sendmsg(2), sendmmsg(2) for
+		  an unconnected unix socket (since 6.7);
 		  **recvmsg4** call to recvfrom(2), recvmsg(2), recvmmsg(2) for
 		  an unconnected udp4 socket (since 5.2);
 		  **recvmsg6** call to recvfrom(2), recvmsg(2), recvmmsg(2) for
 		  an unconnected udp6 socket (since 5.2);
+		  **recvmsg_unix** call to recvfrom(2), recvmsg(2), recvmmsg(2) for
+		  an unconnected unix socket (since 6.7);
 		  **sysctl** sysctl access (since 5.2);
 		  **getsockopt** call to getsockopt (since 5.3);
 		  **setsockopt** call to setsockopt (since 5.3);
 		  **getpeername4** call to getpeername(2) for an inet4 socket (since 5.8);
 		  **getpeername6** call to getpeername(2) for an inet6 socket (since 5.8);
+		  **getpeername_unix** call to getpeername(2) for a unix socket (since 6.7);
 		  **getsockname4** call to getsockname(2) for an inet4 socket (since 5.8);
 		  **getsockname6** call to getsockname(2) for an inet6 socket (since 5.8).
+		  **getsockname_unix** call to getsockname(2) for a unix socket (since 6.7);
 		  **sock_release** closing an userspace inet socket (since 5.9).
 
 	**bpftool cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*

tools/bpf/bpftool/Documentation/bpftool-prog.rst

@@ -47,9 +47,11 @@ PROG COMMANDS
 |		**cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
 |		**lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
 |		**cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
-|		**cgroup/connect4** | **cgroup/connect6** | **cgroup/getpeername4** | **cgroup/getpeername6** |
-|               **cgroup/getsockname4** | **cgroup/getsockname6** | **cgroup/sendmsg4** | **cgroup/sendmsg6** |
-|		**cgroup/recvmsg4** | **cgroup/recvmsg6** | **cgroup/sysctl** |
+|		**cgroup/connect4** | **cgroup/connect6** | **cgroup/connect_unix** |
+|		**cgroup/getpeername4** | **cgroup/getpeername6** | **cgroup/getpeername_unix** |
+|		**cgroup/getsockname4** | **cgroup/getsockname6** | **cgroup/getsockname_unix** |
+|		**cgroup/sendmsg4** | **cgroup/sendmsg6** | **cgroup/sendmsg_unix** |
+|		**cgroup/recvmsg4** | **cgroup/recvmsg6** | **cgroup/recvmsg_unix** | **cgroup/sysctl** |
 |		**cgroup/getsockopt** | **cgroup/setsockopt** | **cgroup/sock_release** |
 |		**struct_ops** | **fentry** | **fexit** | **freplace** | **sk_lookup**
 |	}

tools/bpf/bpftool/bash-completion/bpftool

@@ -480,13 +480,13 @@ _bpftool()
                                 action tracepoint raw_tracepoint \
                                 xdp perf_event cgroup/skb cgroup/sock \
                                 cgroup/dev lwt_in lwt_out lwt_xmit \
-                                lwt_seg6local sockops sk_skb sk_msg \
-                                lirc_mode2 cgroup/bind4 cgroup/bind6 \
-                                cgroup/connect4 cgroup/connect6 \
-                                cgroup/getpeername4 cgroup/getpeername6 \
-                                cgroup/getsockname4 cgroup/getsockname6 \
-                                cgroup/sendmsg4 cgroup/sendmsg6 \
-                                cgroup/recvmsg4 cgroup/recvmsg6 \
+                                lwt_seg6local sockops sk_skb sk_msg lirc_mode2 \
+                                cgroup/bind4 cgroup/bind6 \
+                                cgroup/connect4 cgroup/connect6 cgroup/connect_unix \
+                                cgroup/getpeername4 cgroup/getpeername6 cgroup/getpeername_unix \
+                                cgroup/getsockname4 cgroup/getsockname6 cgroup/getsockname_unix \
+                                cgroup/sendmsg4 cgroup/sendmsg6 cgroup/sendmsg_unix \
+                                cgroup/recvmsg4 cgroup/recvmsg6 cgroup/recvmsg_unix \
                                 cgroup/post_bind4 cgroup/post_bind6 \
                                 cgroup/sysctl cgroup/getsockopt \
                                 cgroup/setsockopt cgroup/sock_release struct_ops \

tools/bpf/bpftool/cgroup.c

@@ -28,13 +28,15 @@
 	"                        cgroup_device | cgroup_inet4_bind |\n" \
 	"                        cgroup_inet6_bind | cgroup_inet4_post_bind |\n" \
 	"                        cgroup_inet6_post_bind | cgroup_inet4_connect |\n" \
-	"                        cgroup_inet6_connect | cgroup_inet4_getpeername |\n" \
-	"                        cgroup_inet6_getpeername | cgroup_inet4_getsockname |\n" \
-	"                        cgroup_inet6_getsockname | cgroup_udp4_sendmsg |\n" \
-	"                        cgroup_udp6_sendmsg | cgroup_udp4_recvmsg |\n" \
-	"                        cgroup_udp6_recvmsg | cgroup_sysctl |\n" \
-	"                        cgroup_getsockopt | cgroup_setsockopt |\n" \
-	"                        cgroup_inet_sock_release }"
+	"                        cgroup_inet6_connect | cgroup_unix_connect |\n" \
+	"                        cgroup_inet4_getpeername | cgroup_inet6_getpeername |\n" \
+	"                        cgroup_unix_getpeername | cgroup_inet4_getsockname |\n" \
+	"                        cgroup_inet6_getsockname | cgroup_unix_getsockname |\n" \
+	"                        cgroup_udp4_sendmsg | cgroup_udp6_sendmsg |\n" \
+	"                        cgroup_unix_sendmsg | cgroup_udp4_recvmsg |\n" \
+	"                        cgroup_udp6_recvmsg | cgroup_unix_recvmsg |\n" \
+	"                        cgroup_sysctl | cgroup_getsockopt |\n" \
+	"                        cgroup_setsockopt | cgroup_inet_sock_release }"
 
 static unsigned int query_flags;
 static struct btf *btf_vmlinux;

tools/bpf/bpftool/prog.c

@@ -2475,9 +2475,10 @@ static int do_help(int argc, char **argv)
 		"                 sk_reuseport | flow_dissector | cgroup/sysctl |\n"
 		"                 cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
 		"                 cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
-		"                 cgroup/getpeername4 | cgroup/getpeername6 |\n"
-		"                 cgroup/getsockname4 | cgroup/getsockname6 | cgroup/sendmsg4 |\n"
-		"                 cgroup/sendmsg6 | cgroup/recvmsg4 | cgroup/recvmsg6 |\n"
+		"                 cgroup/connect_unix | cgroup/getpeername4 | cgroup/getpeername6 |\n"
+		"                 cgroup/getpeername_unix | cgroup/getsockname4 | cgroup/getsockname6 |\n"
+		"                 cgroup/getsockname_unix | cgroup/sendmsg4 | cgroup/sendmsg6 |\n"
+		"                 cgroup/sendmsg°unix | cgroup/recvmsg4 | cgroup/recvmsg6 | cgroup/recvmsg_unix |\n"
 		"                 cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n"
 		"                 struct_ops | fentry | fexit | freplace | sk_lookup }\n"
 		"       ATTACH_TYPE := { sk_msg_verdict | sk_skb_verdict | sk_skb_stream_verdict |\n"