diff options
author | Daniel Müller <deso@posteo.net> | 2022-05-24 01:04:22 +0200 |
---|---|---|
committer | Andrii Nakryiko <andrii@kernel.org> | 2022-06-03 01:26:24 +0200 |
commit | 2e98964bd6e283568730b1a4da3b1e4da3306a8e (patch) | |
tree | 531451f06709f20a67f53ca60ed133390db72c35 /tools/bpf/bpftool | |
parent | selftests/bpf: Add test for libbpf_bpf_map_type_str (diff) | |
download | linux-2e98964bd6e283568730b1a4da3b1e4da3306a8e.tar.xz linux-2e98964bd6e283568730b1a4da3b1e4da3306a8e.zip |
bpftool: Use libbpf_bpf_map_type_str
This change switches bpftool over to using the recently introduced
libbpf_bpf_map_type_str function instead of maintaining its own string
representation for the bpf_map_type enum.
Signed-off-by: Daniel Müller <deso@posteo.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20220523230428.3077108-7-deso@posteo.net
Diffstat (limited to 'tools/bpf/bpftool')
-rw-r--r-- | tools/bpf/bpftool/feature.c | 30 | ||||
-rw-r--r-- | tools/bpf/bpftool/main.h | 3 | ||||
-rw-r--r-- | tools/bpf/bpftool/map.c | 69 |
3 files changed, 42 insertions, 60 deletions
diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c index 02753f934ed3..cc9e4df8c58e 100644 --- a/tools/bpf/bpftool/feature.c +++ b/tools/bpf/bpftool/feature.c @@ -615,8 +615,8 @@ static bool probe_map_type_ifindex(enum bpf_map_type map_type, __u32 ifindex) } static void -probe_map_type(enum bpf_map_type map_type, const char *define_prefix, - __u32 ifindex) +probe_map_type(enum bpf_map_type map_type, char const *map_type_str, + const char *define_prefix, __u32 ifindex) { char feat_name[128], plain_desc[128], define_name[128]; const char *plain_comment = "eBPF map_type "; @@ -641,20 +641,16 @@ probe_map_type(enum bpf_map_type map_type, const char *define_prefix, * check required for unprivileged users */ - if (!map_type_name[map_type]) { - p_info("map type name not found (type %d)", map_type); - return; - } maxlen = sizeof(plain_desc) - strlen(plain_comment) - 1; - if (strlen(map_type_name[map_type]) > maxlen) { + if (strlen(map_type_str) > maxlen) { p_info("map type name too long"); return; } - sprintf(feat_name, "have_%s_map_type", map_type_name[map_type]); - sprintf(define_name, "%s_map_type", map_type_name[map_type]); + sprintf(feat_name, "have_%s_map_type", map_type_str); + sprintf(define_name, "%s_map_type", map_type_str); uppercase(define_name, sizeof(define_name)); - sprintf(plain_desc, "%s%s", plain_comment, map_type_name[map_type]); + sprintf(plain_desc, "%s%s", plain_comment, map_type_str); print_bool_feature(feat_name, plain_desc, define_name, res, define_prefix); } @@ -963,15 +959,23 @@ section_program_types(bool *supported_types, const char *define_prefix, static void section_map_types(const char *define_prefix, __u32 ifindex) { - unsigned int i; + unsigned int map_type = BPF_MAP_TYPE_UNSPEC; + const char *map_type_str; print_start_section("map_types", "Scanning eBPF map types...", "/*** eBPF map types ***/", define_prefix); - for (i = BPF_MAP_TYPE_UNSPEC + 1; i < map_type_name_size; i++) - probe_map_type(i, define_prefix, ifindex); + while (true) { + map_type++; + map_type_str = libbpf_bpf_map_type_str(map_type); + /* libbpf will return NULL for variants unknown to it. */ + if (!map_type_str) + break; + + probe_map_type(map_type, map_type_str, define_prefix, ifindex); + } print_end_section(); } diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h index 74204d0e33cf..e4fdaa0740b3 100644 --- a/tools/bpf/bpftool/main.h +++ b/tools/bpf/bpftool/main.h @@ -65,9 +65,6 @@ static inline void *u64_to_ptr(__u64 ptr) extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE]; -extern const char * const map_type_name[]; -extern const size_t map_type_name_size; - /* keep in sync with the definition in skeleton/pid_iter.bpf.c */ enum bpf_obj_type { BPF_OBJ_UNKNOWN, diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index 70a1fd5253da..800834be1bcb 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -22,42 +22,6 @@ #include "json_writer.h" #include "main.h" -const char * const map_type_name[] = { - [BPF_MAP_TYPE_UNSPEC] = "unspec", - [BPF_MAP_TYPE_HASH] = "hash", - [BPF_MAP_TYPE_ARRAY] = "array", - [BPF_MAP_TYPE_PROG_ARRAY] = "prog_array", - [BPF_MAP_TYPE_PERF_EVENT_ARRAY] = "perf_event_array", - [BPF_MAP_TYPE_PERCPU_HASH] = "percpu_hash", - [BPF_MAP_TYPE_PERCPU_ARRAY] = "percpu_array", - [BPF_MAP_TYPE_STACK_TRACE] = "stack_trace", - [BPF_MAP_TYPE_CGROUP_ARRAY] = "cgroup_array", - [BPF_MAP_TYPE_LRU_HASH] = "lru_hash", - [BPF_MAP_TYPE_LRU_PERCPU_HASH] = "lru_percpu_hash", - [BPF_MAP_TYPE_LPM_TRIE] = "lpm_trie", - [BPF_MAP_TYPE_ARRAY_OF_MAPS] = "array_of_maps", - [BPF_MAP_TYPE_HASH_OF_MAPS] = "hash_of_maps", - [BPF_MAP_TYPE_DEVMAP] = "devmap", - [BPF_MAP_TYPE_DEVMAP_HASH] = "devmap_hash", - [BPF_MAP_TYPE_SOCKMAP] = "sockmap", - [BPF_MAP_TYPE_CPUMAP] = "cpumap", - [BPF_MAP_TYPE_XSKMAP] = "xskmap", - [BPF_MAP_TYPE_SOCKHASH] = "sockhash", - [BPF_MAP_TYPE_CGROUP_STORAGE] = "cgroup_storage", - [BPF_MAP_TYPE_REUSEPORT_SOCKARRAY] = "reuseport_sockarray", - [BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE] = "percpu_cgroup_storage", - [BPF_MAP_TYPE_QUEUE] = "queue", - [BPF_MAP_TYPE_STACK] = "stack", - [BPF_MAP_TYPE_SK_STORAGE] = "sk_storage", - [BPF_MAP_TYPE_STRUCT_OPS] = "struct_ops", - [BPF_MAP_TYPE_RINGBUF] = "ringbuf", - [BPF_MAP_TYPE_INODE_STORAGE] = "inode_storage", - [BPF_MAP_TYPE_TASK_STORAGE] = "task_storage", - [BPF_MAP_TYPE_BLOOM_FILTER] = "bloom_filter", -}; - -const size_t map_type_name_size = ARRAY_SIZE(map_type_name); - static struct hashmap *map_table; static bool map_is_per_cpu(__u32 type) @@ -81,12 +45,18 @@ static bool map_is_map_of_progs(__u32 type) static int map_type_from_str(const char *type) { + const char *map_type_str; unsigned int i; - for (i = 0; i < ARRAY_SIZE(map_type_name); i++) + for (i = 0; ; i++) { + map_type_str = libbpf_bpf_map_type_str(i); + if (!map_type_str) + break; + /* Don't allow prefixing in case of possible future shadowing */ - if (map_type_name[i] && !strcmp(map_type_name[i], type)) + if (!strcmp(map_type_str, type)) return i; + } return -1; } @@ -472,9 +442,12 @@ static int parse_elem(char **argv, struct bpf_map_info *info, static void show_map_header_json(struct bpf_map_info *info, json_writer_t *wtr) { + const char *map_type_str; + jsonw_uint_field(wtr, "id", info->id); - if (info->type < ARRAY_SIZE(map_type_name)) - jsonw_string_field(wtr, "type", map_type_name[info->type]); + map_type_str = libbpf_bpf_map_type_str(info->type); + if (map_type_str) + jsonw_string_field(wtr, "type", map_type_str); else jsonw_uint_field(wtr, "type", info->type); @@ -561,9 +534,13 @@ static int show_map_close_json(int fd, struct bpf_map_info *info) static void show_map_header_plain(struct bpf_map_info *info) { + const char *map_type_str; + printf("%u: ", info->id); - if (info->type < ARRAY_SIZE(map_type_name)) - printf("%s ", map_type_name[info->type]); + + map_type_str = libbpf_bpf_map_type_str(info->type); + if (map_type_str) + printf("%s ", map_type_str); else printf("type %u ", info->type); @@ -879,9 +856,13 @@ map_dump(int fd, struct bpf_map_info *info, json_writer_t *wtr, } if (info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY && - info->value_size != 8) + info->value_size != 8) { + const char *map_type_str; + + map_type_str = libbpf_bpf_map_type_str(info->type); p_info("Warning: cannot read values from %s map with value_size != 8", - map_type_name[info->type]); + map_type_str); + } while (true) { err = bpf_map_get_next_key(fd, prev_key, key); if (err) { |