bpftool: Use feature list in bash completion

Now that bpftool is able to produce a list of known program, map, attach
types, let's use as much of this as we can in the bash completion file,
so that we don't have to expand the list each time a new type is added
to the kernel.

Also update the relevant test script to remove some checks that are no
longer needed.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Müller <deso@posteo.net>
Link: https://lore.kernel.org/bpf/20220629203637.138944-3-quentin@isovalent.com

tools/bpf/bpftool/bash-completion/bpftool

@@ -703,15 +703,8 @@ _bpftool()
                             return 0
                             ;;
                         type)
-                            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 ringbuf inode_storage task_storage \
-                                bloom_filter'
+                            local BPFTOOL_MAP_CREATE_TYPES="$(bpftool feature list map_types | \
+                                grep -v '^unspec$')"
                             COMPREPLY=( $( compgen -W "$BPFTOOL_MAP_CREATE_TYPES" -- "$cur" ) )
                             return 0
                             ;;
@@ -1039,14 +1032,8 @@ _bpftool()
                     return 0
                     ;;
                 attach|detach)
-                    local BPFTOOL_CGROUP_ATTACH_TYPES='cgroup_inet_ingress cgroup_inet_egress \
-                        cgroup_inet_sock_create cgroup_sock_ops cgroup_device cgroup_inet4_bind \
-                        cgroup_inet6_bind cgroup_inet4_post_bind cgroup_inet6_post_bind \
-                        cgroup_inet4_connect cgroup_inet6_connect cgroup_inet4_getpeername \
-                        cgroup_inet6_getpeername cgroup_inet4_getsockname cgroup_inet6_getsockname \
-                        cgroup_udp4_sendmsg cgroup_udp6_sendmsg cgroup_udp4_recvmsg \
-                        cgroup_udp6_recvmsg cgroup_sysctl cgroup_getsockopt cgroup_setsockopt \
-                        cgroup_inet_sock_release'
+                    local BPFTOOL_CGROUP_ATTACH_TYPES="$(bpftool feature list attach_types | \
+                        grep '^cgroup_')"
                     local ATTACH_FLAGS='multi override'
                     local PROG_TYPE='id pinned tag name'
                     # Check for $prev = $command first

tools/testing/selftests/bpf/test_bpftool_synctypes.py

@@ -471,12 +471,6 @@ class BashcompExtractor(FileExtractor):
     def get_prog_attach_types(self):
         return self.get_bashcomp_list('BPFTOOL_PROG_ATTACH_TYPES')
 
-    def get_map_types(self):
-        return self.get_bashcomp_list('BPFTOOL_MAP_CREATE_TYPES')
-
-    def get_cgroup_attach_types(self):
-        return self.get_bashcomp_list('BPFTOOL_CGROUP_ATTACH_TYPES')
-
 def verify(first_set, second_set, message):
     """
     Print all values that differ between two sets.
@@ -516,17 +510,12 @@ def main():
     man_map_types = man_map_info.get_map_types()
     man_map_info.close()
 
-    bashcomp_info = BashcompExtractor()
-    bashcomp_map_types = bashcomp_info.get_map_types()
-
     verify(source_map_types, help_map_types,
             f'Comparing {BpfHeaderExtractor.filename} (bpf_map_type) and {MapFileExtractor.filename} (do_help() TYPE):')
     verify(source_map_types, man_map_types,
             f'Comparing {BpfHeaderExtractor.filename} (bpf_map_type) and {ManMapExtractor.filename} (TYPE):')
     verify(help_map_options, man_map_options,
             f'Comparing {MapFileExtractor.filename} (do_help() OPTIONS) and {ManMapExtractor.filename} (OPTIONS):')
-    verify(source_map_types, bashcomp_map_types,
-            f'Comparing {BpfHeaderExtractor.filename} (bpf_map_type) and {BashcompExtractor.filename} (BPFTOOL_MAP_CREATE_TYPES):')
 
     # Attach types (names)
 
@@ -542,8 +531,10 @@ def main():
     man_prog_attach_types = man_prog_info.get_attach_types()
     man_prog_info.close()
 
-    bashcomp_info.reset_read() # We stopped at map types, rewind
+
+    bashcomp_info = BashcompExtractor()
     bashcomp_prog_attach_types = bashcomp_info.get_prog_attach_types()
+    bashcomp_info.close()
 
     verify(source_prog_attach_types, help_prog_attach_types,
             f'Comparing {ProgFileExtractor.filename} (bpf_attach_type) and {ProgFileExtractor.filename} (do_help() ATTACH_TYPE):')
@@ -568,17 +559,12 @@ def main():
     man_cgroup_attach_types = man_cgroup_info.get_attach_types()
     man_cgroup_info.close()
 
-    bashcomp_cgroup_attach_types = bashcomp_info.get_cgroup_attach_types()
-    bashcomp_info.close()
-
     verify(source_cgroup_attach_types, help_cgroup_attach_types,
             f'Comparing {BpfHeaderExtractor.filename} (bpf_attach_type) and {CgroupFileExtractor.filename} (do_help() ATTACH_TYPE):')
     verify(source_cgroup_attach_types, man_cgroup_attach_types,
             f'Comparing {BpfHeaderExtractor.filename} (bpf_attach_type) and {ManCgroupExtractor.filename} (ATTACH_TYPE):')
     verify(help_cgroup_options, man_cgroup_options,
             f'Comparing {CgroupFileExtractor.filename} (do_help() OPTIONS) and {ManCgroupExtractor.filename} (OPTIONS):')
-    verify(source_cgroup_attach_types, bashcomp_cgroup_attach_types,
-            f'Comparing {BpfHeaderExtractor.filename} (bpf_attach_type) and {BashcompExtractor.filename} (BPFTOOL_CGROUP_ATTACH_TYPES):')
 
     # Options for remaining commands