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Date: Fri, 30 Jul 2021 11:45:00 -0700
From: Andrii Nakryiko <andrii.nakryiko@...il.com>
To: Quentin Monnet <quentin@...valent.com>
Cc: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>,
Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH bpf-next 1/7] tools: bpftool: slightly ease bash
completion updates
On Thu, Jul 29, 2021 at 9:29 AM Quentin Monnet <quentin@...valent.com> wrote:
>
> Bash completion for bpftool gets two minor improvements in this patch.
>
> Move the detection of attach types for "bpftool cgroup attach" outside
> of the "case/esac" bloc, where we cannot reuse our variable holding the
> list of supported attach types as a pattern list. After the change, we
> have only one list of cgroup attach types to update when new types are
> added, instead of the former two lists.
>
> Also rename the variables holding lists of names for program types, map
> types, and attach types, to make them more unique. This can make it
> slightly easier to point people to the relevant variables to update, but
> the main objective here is to help run a script to check that bash
> completion is up-to-date with bpftool's source code.
>
> Signed-off-by: Quentin Monnet <quentin@...valent.com>
> ---
> tools/bpf/bpftool/bash-completion/bpftool | 57 +++++++++++++----------
> 1 file changed, 32 insertions(+), 25 deletions(-)
>
> diff --git a/tools/bpf/bpftool/bash-completion/bpftool b/tools/bpf/bpftool/bash-completion/bpftool
> index cc33c5824a2f..b2e33a2d8524 100644
> --- a/tools/bpf/bpftool/bash-completion/bpftool
> +++ b/tools/bpf/bpftool/bash-completion/bpftool
> @@ -404,8 +404,10 @@ _bpftool()
> return 0
> ;;
> 5)
> - COMPREPLY=( $( compgen -W 'msg_verdict stream_verdict \
> - stream_parser flow_dissector' -- "$cur" ) )
> + local BPFTOOL_PROG_ATTACH_TYPES='msg_verdict \
> + stream_verdict stream_parser flow_dissector'
> + COMPREPLY=( $( compgen -W \
> + "$BPFTOOL_PROG_ATTACH_TYPES" -- "$cur" ) )
> return 0
> ;;
> 6)
> @@ -464,7 +466,7 @@ _bpftool()
>
> case $prev in
> type)
> - COMPREPLY=( $( compgen -W "socket kprobe \
> + local BPFTOOL_PROG_LOAD_TYPES='socket kprobe \
> kretprobe classifier flow_dissector \
> action tracepoint raw_tracepoint \
> xdp perf_event cgroup/skb cgroup/sock \
> @@ -479,8 +481,9 @@ _bpftool()
> cgroup/post_bind4 cgroup/post_bind6 \
> cgroup/sysctl cgroup/getsockopt \
> cgroup/setsockopt cgroup/sock_release struct_ops \
> - fentry fexit freplace sk_lookup" -- \
> - "$cur" ) )
> + fentry fexit freplace sk_lookup'
> + COMPREPLY=( $( compgen -W \
> + "$BPFTOOL_PROG_LOAD_TYPES" -- "$cur" ) )
nit: this and similar COMPREPLY assignments now can be on a single line now, no?
> return 0
> ;;
> id)
> @@ -698,15 +701,16 @@ _bpftool()
> return 0
> ;;
> type)
> - COMPREPLY=( $( compgen -W 'hash array prog_array \
> - perf_event_array percpu_hash percpu_array \
> - stack_trace cgroup_array lru_hash \
> + local BPFTOOL_MAP_CREATE_TYPES='hash array \
> + prog_array perf_event_array percpu_hash \
> + percpu_array stack_trace cgroup_array lru_hash \
> lru_percpu_hash lpm_trie array_of_maps \
> hash_of_maps devmap devmap_hash sockmap cpumap \
> xskmap sockhash cgroup_storage reuseport_sockarray \
> percpu_cgroup_storage queue stack sk_storage \
> - struct_ops inode_storage task_storage' -- \
> - "$cur" ) )
> + struct_ops inode_storage task_storage'
> + COMPREPLY=( $( compgen -W \
> + "$BPFTOOL_MAP_CREATE_TYPES" -- "$cur" ) )
> return 0
> ;;
> key|value|flags|entries)
> @@ -1017,34 +1021,37 @@ _bpftool()
> return 0
> ;;
> attach|detach)
> - local ATTACH_TYPES='ingress egress sock_create sock_ops \
> - device bind4 bind6 post_bind4 post_bind6 connect4 connect6 \
> + local BPFTOOL_CGROUP_ATTACH_TYPES='ingress egress \
> + sock_create sock_ops device \
> + bind4 bind6 post_bind4 post_bind6 connect4 connect6 \
> getpeername4 getpeername6 getsockname4 getsockname6 \
> sendmsg4 sendmsg6 recvmsg4 recvmsg6 sysctl getsockopt \
> setsockopt sock_release'
> local ATTACH_FLAGS='multi override'
> local PROG_TYPE='id pinned tag name'
> - case $prev in
> - $command)
> - _filedir
> - return 0
> - ;;
> - ingress|egress|sock_create|sock_ops|device|bind4|bind6|\
> - post_bind4|post_bind6|connect4|connect6|getpeername4|\
> - getpeername6|getsockname4|getsockname6|sendmsg4|sendmsg6|\
> - recvmsg4|recvmsg6|sysctl|getsockopt|setsockopt|sock_release)
> + # Check for $prev = $command first
> + if [ $prev = $command ]; then
> + _filedir
> + return 0
> + # Then check for attach type. This is done outside of the
> + # "case $prev in" to avoid writing the whole list of attach
> + # types again as pattern to match (where we cannot reuse
> + # our variable).
> + elif [[ $BPFTOOL_CGROUP_ATTACH_TYPES =~ $prev ]]; then
> COMPREPLY=( $( compgen -W "$PROG_TYPE" -- \
> "$cur" ) )
> return 0
> - ;;
> + fi
> + # case/esac for the other cases
> + case $prev in
> id)
> _bpftool_get_prog_ids
> return 0
> ;;
> *)
> - if ! _bpftool_search_list "$ATTACH_TYPES"; then
> - COMPREPLY=( $( compgen -W "$ATTACH_TYPES" -- \
> - "$cur" ) )
> + if ! _bpftool_search_list "$BPFTOOL_CGROUP_ATTACH_TYPES"; then
> + COMPREPLY=( $( compgen -W \
> + "$BPFTOOL_CGROUP_ATTACH_TYPES" -- "$cur" ) )
> elif [[ "$command" == "attach" ]]; then
> # We have an attach type on the command line,
> # but it is not the previous word, or
> --
> 2.30.2
>
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