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authorJakub Kicinski <jakub.kicinski@netronome.com>2018-05-03 18:37:16 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2018-05-04 23:41:04 +0200
commitf412eed9dfdeeb6becd7de2ffe8b5d0a8b3f81ca (patch)
treec6cf7b305e343a73505d5d1d25ee300a46992147 /tools/bpf/bpftool/bash-completion
parente64d52569f6e847495091db40ab58d2d379748ef (diff)
tools: bpftool: add simple perf event output reader
Users of BPF sooner or later discover perf_event_output() helpers and BPF_MAP_TYPE_PERF_EVENT_ARRAY. Dumping this array type is not possible, however, we can add simple reading of perf events. Create a new event_pipe subcommand for maps, this sub command will only work with BPF_MAP_TYPE_PERF_EVENT_ARRAY maps. Parts of the code from samples/bpf/trace_output_user.c. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf/bpftool/bash-completion')
-rw-r--r--tools/bpf/bpftool/bash-completion/bpftool36
1 files changed, 34 insertions, 2 deletions
diff --git a/tools/bpf/bpftool/bash-completion/bpftool b/tools/bpf/bpftool/bash-completion/bpftool
index 852d84a98acd..b301c9b315f1 100644
--- a/tools/bpf/bpftool/bash-completion/bpftool
+++ b/tools/bpf/bpftool/bash-completion/bpftool
@@ -1,6 +1,6 @@
# bpftool(8) bash completion -*- shell-script -*-
#
-# Copyright (C) 2017 Netronome Systems, Inc.
+# Copyright (C) 2017-2018 Netronome Systems, Inc.
#
# This software is dual licensed under the GNU General License
# Version 2, June 1991 as shown in the file COPYING in the top-level
@@ -79,6 +79,14 @@ _bpftool_get_map_ids()
command sed -n 's/.*"id": \(.*\),$/\1/p' )" -- "$cur" ) )
}
+_bpftool_get_perf_map_ids()
+{
+ COMPREPLY+=( $( compgen -W "$( bpftool -jp map 2>&1 | \
+ command grep -C2 perf_event_array | \
+ command sed -n 's/.*"id": \(.*\),$/\1/p' )" -- "$cur" ) )
+}
+
+
_bpftool_get_prog_ids()
{
COMPREPLY+=( $( compgen -W "$( bpftool -jp prog 2>&1 | \
@@ -359,10 +367,34 @@ _bpftool()
fi
return 0
;;
+ event_pipe)
+ case $prev in
+ $command)
+ COMPREPLY=( $( compgen -W "$MAP_TYPE" -- "$cur" ) )
+ return 0
+ ;;
+ id)
+ _bpftool_get_perf_map_ids
+ return 0
+ ;;
+ cpu)
+ return 0
+ ;;
+ index)
+ return 0
+ ;;
+ *)
+ _bpftool_once_attr 'cpu'
+ _bpftool_once_attr 'index'
+ return 0
+ ;;
+ esac
+ ;;
*)
[[ $prev == $object ]] && \
COMPREPLY=( $( compgen -W 'delete dump getnext help \
- lookup pin show list update' -- "$cur" ) )
+ lookup pin event_pipe show list update' -- \
+ "$cur" ) )
;;
esac
;;