Sock map/hash introduce support for attaching programs to maps. To
date I have been doing this with custom tooling but this is less than
ideal as we shift to using bpftool as the single CLI for our BPF uses.
This patch adds new sub commands 'attach' and 'detach' to the 'prog'
command to attach programs to maps and then detach them.
Signed-off-by: John Fastabend
---
tools/bpf/bpftool/Documentation/bpftool-prog.rst | 11 ++
tools/bpf/bpftool/Documentation/bpftool.rst |2
tools/bpf/bpftool/bash-completion/bpftool| 19
tools/bpf/bpftool/prog.c | 99 ++
4 files changed, 128 insertions(+), 3 deletions(-)
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index 64156a1..12c8030 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -25,6 +25,8 @@ MAP COMMANDS
| **bpftool** **prog dump jited** *PROG* [{**file** *FILE* |
**opcodes**}]
| **bpftool** **prog pin** *PROG* *FILE*
| **bpftool** **prog load** *OBJ* *FILE* [**type** *TYPE*] [**map**
{**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
+| **bpftool** **prog attach** *PROG* *ATTACH_TYPE* *MAP*
+| **bpftool** **prog detach** *PROG* *ATTACH_TYPE* *MAP*
| **bpftool** **prog help**
|
| *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
@@ -37,6 +39,7 @@ MAP COMMANDS
| **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** |
**cgroup/post_bind6** |
| **cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4**
| **cgroup/sendmsg6**
| }
+| *ATTACH_TYPE* := { **msg_verdict** | **skb_verdict** | **skb_parse** }
DESCRIPTION
@@ -90,6 +93,14 @@ DESCRIPTION
Note: *FILE* must be located in *bpffs* mount.
+**bpftool prog attach** *PROG* *ATTACH_TYPE* *MAP*
+ Attach bpf program *PROG* (with type specified by
*ATTACH_TYPE*)
+ to the map *MAP*.
+
+**bpftool prog detach** *PROG* *ATTACH_TYPE* *MAP*
+ Detach bpf program *PROG* (with type specified by
*ATTACH_TYPE*)
+ from the map *MAP*.
+
**bpftool prog help**
Print short help message.
diff --git a/tools/bpf/bpftool/Documentation/bpftool.rst
b/tools/bpf/bpftool/Documentation/bpftool.rst
index 8dda77d..25c0872 100644
--- a/tools/bpf/bpftool/Documentation/bpftool.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool.rst
@@ -26,7 +26,7 @@ SYNOPSIS
| **pin** | **event_pipe** | **help** }
*PROG-COMMANDS* := { **show** | **list** | **dump jited** | **dump
xlated** | **pin**
- | **load** | **help** }
+ | **load** | **attach** | **detach** | **help** }
*CGROUP-COMMANDS* := { **show** | **list** | **attach** | **detach** |
**help** }
diff --git a/tools/bpf/bpftool/bash-completion/bpftool
b/tools/bpf/bpftool/bash-completion/bpftool
index df1060b..0826519 100644
--- a/tools/bpf/bpftool/bash-completion/bpftool
+++ b/tools/bpf/bpftool/bash-completion/bpftool
@@ -292,6 +292,23 @@ _bpftool()
fi
return 0
;;
+attach|detach)
+if [[ ${#words[@]} == 7 ]]; then
+COMPREPLY=( $( compgen -W "id pinned" -- "$cur" ) )
+return 0
+fi
+
+if [[ ${#words[@]} == 6 ]]; then
+COMPREPLY=( $( compgen -W "msg_verdict skb_verdict
skb_parse" -- "$cur" ) )
+return 0
+fi
+
+if [[ $prev == "$command" ]]; then
+COMPREPLY=( $( compgen -W "id pinned" -- "$cur" ) )
+return 0
+fi
+return 0
+;;
load)
local obj
@@ -347,7 +364,7 @@ _bpftool()
;;
*)
[[ $prev == $object ]] && \
-COMPREPLY=( $( compgen -W 'dump help pin load \
+COMPREPLY=( $( compgen -W 'dump help pin attach detach
load \
show list' -- "$cur" ) )
;;
esac
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index b1cd3bc..99ab42c 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -77,6 +77,26 @@
[BPF_PROG_TYPE_FLOW_DISSECTOR] = "flow_dissector",
};
+static const char * const attach_type_strings[] = {
+ [BPF_SK_SKB_STREAM_PARSER] = "stream_parser",
+ [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",
+ [BPF_SK_MSG_VERDICT] = "msg_verdict",
+ [__MAX_BPF_ATTACH_TYPE] = NULL,
+};
+
+enum bpf_attach_type parse_attach_type(const char *str)
+{
+ enum bpf_attach_type type;
+
+ for (t
