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Date: Wed, 28 Aug 2019 14:03:12 -0700
From: Julia Kartseva <hex@...com>
To: <rdna@...com>, <bpf@...r.kernel.org>, <ast@...nel.org>,
<daniel@...earbox.net>, <netdev@...r.kernel.org>,
<kernel-team@...com>
CC: Julia Kartseva <hex@...com>
Subject: [PATCH bpf-next 09/10] tools/bpftool: use libbpf_(prog|map)_type_to_str helpers
Replace lookup in (prog|map)_type_name arrays with
libbpf_(prog|map)_type_to_str helpers.
Use __MAX_BPF_(PROG|MAP)_TYPE enum values as loop bounds.
Signed-off-by: Julia Kartseva <hex@...com>
---
tools/bpf/bpftool/feature.c | 47 ++++++++++++++--------
tools/bpf/bpftool/main.h | 33 ---------------
tools/bpf/bpftool/map.c | 80 ++++++++++---------------------------
tools/bpf/bpftool/prog.c | 11 ++---
4 files changed, 59 insertions(+), 112 deletions(-)
diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c
index 03bdc5b3ac49..e9416005e721 100644
--- a/tools/bpf/bpftool/feature.c
+++ b/tools/bpf/bpftool/feature.c
@@ -462,7 +462,7 @@ probe_prog_type(enum bpf_prog_type prog_type, bool *supported_types,
const char *define_prefix, __u32 ifindex)
{
char feat_name[128], plain_desc[128], define_name[128];
- const char *plain_comment = "eBPF program_type ";
+ const char *ptype_name, *plain_comment = "eBPF program_type ";
size_t maxlen;
bool res;
@@ -480,16 +480,21 @@ probe_prog_type(enum bpf_prog_type prog_type, bool *supported_types,
supported_types[prog_type] |= res;
+ if (libbpf_prog_type_to_str(prog_type, &ptype_name)) {
+ p_info("program type name does not exist");
+ return;
+ }
+
maxlen = sizeof(plain_desc) - strlen(plain_comment) - 1;
- if (strlen(prog_type_name[prog_type]) > maxlen) {
+ if (strlen(ptype_name) > maxlen) {
p_info("program type name too long");
return;
}
- sprintf(feat_name, "have_%s_prog_type", prog_type_name[prog_type]);
- sprintf(define_name, "%s_prog_type", prog_type_name[prog_type]);
+ sprintf(feat_name, "have_%s_prog_type", ptype_name);
+ sprintf(define_name, "%s_prog_type", ptype_name);
uppercase(define_name, sizeof(define_name));
- sprintf(plain_desc, "%s%s", plain_comment, prog_type_name[prog_type]);
+ sprintf(plain_desc, "%s%s", plain_comment, ptype_name);
print_bool_feature(feat_name, plain_desc, define_name, res,
define_prefix);
}
@@ -499,22 +504,27 @@ probe_map_type(enum bpf_map_type map_type, const char *define_prefix,
__u32 ifindex)
{
char feat_name[128], plain_desc[128], define_name[128];
- const char *plain_comment = "eBPF map_type ";
+ const char *mtype_name, *plain_comment = "eBPF map_type ";
size_t maxlen;
bool res;
res = bpf_probe_map_type(map_type, ifindex);
+ if (libbpf_map_type_to_str(map_type, &mtype_name)) {
+ p_info("map type name does not exist");
+ return;
+ }
+
maxlen = sizeof(plain_desc) - strlen(plain_comment) - 1;
- if (strlen(map_type_name[map_type]) > maxlen) {
+ if (strlen(mtype_name) > 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", mtype_name);
+ sprintf(define_name, "%s_map_type", mtype_name);
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, mtype_name);
print_bool_feature(feat_name, plain_desc, define_name, res,
define_prefix);
}
@@ -523,11 +533,16 @@ static void
probe_helpers_for_progtype(enum bpf_prog_type prog_type, bool supported_type,
const char *define_prefix, __u32 ifindex)
{
- const char *ptype_name = prog_type_name[prog_type];
+ const char *ptype_name;
char feat_name[128];
unsigned int id;
bool res;
+ if (libbpf_prog_type_to_str(prog_type, &ptype_name)) {
+ p_info("map type name does not exist");
+ return;
+ }
+
if (ifindex)
/* Only test helpers for offload-able program types */
switch (prog_type) {
@@ -689,7 +704,7 @@ static int do_probe(int argc, char **argv)
"/*** eBPF program types ***/",
define_prefix);
- for (i = BPF_PROG_TYPE_UNSPEC + 1; i < ARRAY_SIZE(prog_type_name); i++)
+ for (i = BPF_PROG_TYPE_UNSPEC + 1; i < __MAX_BPF_PROG_TYPE; i++)
probe_prog_type(i, supported_types, define_prefix, ifindex);
print_end_then_start_section("map_types",
@@ -697,7 +712,7 @@ static int do_probe(int argc, char **argv)
"/*** eBPF map types ***/",
define_prefix);
- for (i = BPF_MAP_TYPE_UNSPEC + 1; i < map_type_name_size; i++)
+ for (i = BPF_MAP_TYPE_UNSPEC + 1; i < __MAX_BPF_MAP_TYPE; i++)
probe_map_type(i, define_prefix, ifindex);
print_end_then_start_section("helpers",
@@ -720,9 +735,9 @@ static int do_probe(int argc, char **argv)
" %sBPF__PROG_TYPE_ ## prog_type ## __HELPER_ ## helper\n",
define_prefix, define_prefix, define_prefix,
define_prefix);
- for (i = BPF_PROG_TYPE_UNSPEC + 1; i < ARRAY_SIZE(prog_type_name); i++)
- probe_helpers_for_progtype(i, supported_types[i],
- define_prefix, ifindex);
+ for (i = BPF_PROG_TYPE_UNSPEC + 1; i <= __MAX_BPF_PROG_TYPE; i++)
+ probe_helpers_for_progtype(i, supported_types[i], define_prefix,
+ ifindex);
exit_close_json:
if (json_output) {
diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h
index af9ad56c303a..bb840d900fb4 100644
--- a/tools/bpf/bpftool/main.h
+++ b/tools/bpf/bpftool/main.h
@@ -48,39 +48,6 @@
"\t {-m|--mapcompat} | {-n|--nomount} }"
#define HELP_SPEC_MAP \
"MAP := { id MAP_ID | pinned FILE }"
-
-static const char * const prog_type_name[] = {
- [BPF_PROG_TYPE_UNSPEC] = "unspec",
- [BPF_PROG_TYPE_SOCKET_FILTER] = "socket_filter",
- [BPF_PROG_TYPE_KPROBE] = "kprobe",
- [BPF_PROG_TYPE_SCHED_CLS] = "sched_cls",
- [BPF_PROG_TYPE_SCHED_ACT] = "sched_act",
- [BPF_PROG_TYPE_TRACEPOINT] = "tracepoint",
- [BPF_PROG_TYPE_XDP] = "xdp",
- [BPF_PROG_TYPE_PERF_EVENT] = "perf_event",
- [BPF_PROG_TYPE_CGROUP_SKB] = "cgroup_skb",
- [BPF_PROG_TYPE_CGROUP_SOCK] = "cgroup_sock",
- [BPF_PROG_TYPE_LWT_IN] = "lwt_in",
- [BPF_PROG_TYPE_LWT_OUT] = "lwt_out",
- [BPF_PROG_TYPE_LWT_XMIT] = "lwt_xmit",
- [BPF_PROG_TYPE_SOCK_OPS] = "sock_ops",
- [BPF_PROG_TYPE_SK_SKB] = "sk_skb",
- [BPF_PROG_TYPE_CGROUP_DEVICE] = "cgroup_device",
- [BPF_PROG_TYPE_SK_MSG] = "sk_msg",
- [BPF_PROG_TYPE_RAW_TRACEPOINT] = "raw_tracepoint",
- [BPF_PROG_TYPE_CGROUP_SOCK_ADDR] = "cgroup_sock_addr",
- [BPF_PROG_TYPE_LWT_SEG6LOCAL] = "lwt_seg6local",
- [BPF_PROG_TYPE_LIRC_MODE2] = "lirc_mode2",
- [BPF_PROG_TYPE_SK_REUSEPORT] = "sk_reuseport",
- [BPF_PROG_TYPE_FLOW_DISSECTOR] = "flow_dissector",
- [BPF_PROG_TYPE_CGROUP_SYSCTL] = "cgroup_sysctl",
- [BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable",
- [BPF_PROG_TYPE_CGROUP_SOCKOPT] = "cgroup_sockopt",
-};
-
-extern const char * const map_type_name[];
-extern const size_t map_type_name_size;
-
enum bpf_obj_type {
BPF_OBJ_UNKNOWN,
BPF_OBJ_PROG,
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index de61d73b9030..ca3760b5c33e 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -16,42 +16,12 @@
#include <sys/stat.h>
#include <bpf.h>
+#include <libbpf.h>
#include "btf.h"
#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",
-};
-
-const size_t map_type_name_size = ARRAY_SIZE(map_type_name);
-
static bool map_is_per_cpu(__u32 type)
{
return type == BPF_MAP_TYPE_PERCPU_HASH ||
@@ -71,17 +41,6 @@ static bool map_is_map_of_progs(__u32 type)
return type == BPF_MAP_TYPE_PROG_ARRAY;
}
-static int map_type_from_str(const char *type)
-{
- unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(map_type_name); i++)
- /* Don't allow prefixing in case of possible future shadowing */
- if (map_type_name[i] && !strcmp(map_type_name[i], type))
- return i;
- return -1;
-}
-
static void *alloc_value(struct bpf_map_info *info)
{
if (map_is_per_cpu(info->type))
@@ -481,6 +440,8 @@ static int parse_elem(char **argv, struct bpf_map_info *info,
static int show_map_close_json(int fd, struct bpf_map_info *info)
{
+ const char *ptype_name, *mtype_name;
+ enum bpf_prog_type prog_type;
char *memlock, *frozen_str;
int frozen = 0;
@@ -488,11 +449,10 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
frozen_str = get_fdinfo(fd, "frozen");
jsonw_start_object(json_wtr);
-
jsonw_uint_field(json_wtr, "id", info->id);
- if (info->type < ARRAY_SIZE(map_type_name))
- jsonw_string_field(json_wtr, "type",
- map_type_name[info->type]);
+
+ if (!libbpf_map_type_to_str(info->type, &mtype_name))
+ jsonw_string_field(json_wtr, "type", mtype_name);
else
jsonw_uint_field(json_wtr, "type", info->type);
@@ -517,11 +477,11 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
char *owner_jited = get_fdinfo(fd, "owner_jited");
if (owner_prog_type) {
- unsigned int prog_type = atoi(owner_prog_type);
+ prog_type = atoi(owner_prog_type);
- if (prog_type < ARRAY_SIZE(prog_type_name))
+ if (!libbpf_prog_type_to_str(prog_type, &ptype_name))
jsonw_string_field(json_wtr, "owner_prog_type",
- prog_type_name[prog_type]);
+ ptype_name);
else
jsonw_uint_field(json_wtr, "owner_prog_type",
prog_type);
@@ -563,6 +523,7 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
static int show_map_close_plain(int fd, struct bpf_map_info *info)
{
+ const char *mtype_name, *ptype_name;
char *memlock, *frozen_str;
int frozen = 0;
@@ -570,8 +531,9 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
frozen_str = get_fdinfo(fd, "frozen");
printf("%u: ", info->id);
- if (info->type < ARRAY_SIZE(map_type_name))
- printf("%s ", map_type_name[info->type]);
+
+ if (!libbpf_map_type_to_str(info->type, &mtype_name))
+ printf("%s ", mtype_name);
else
printf("type %u ", info->type);
@@ -596,10 +558,8 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
printf("\n\t");
if (owner_prog_type) {
unsigned int prog_type = atoi(owner_prog_type);
-
- if (prog_type < ARRAY_SIZE(prog_type_name))
- printf("owner_prog_type %s ",
- prog_type_name[prog_type]);
+ if (!libbpf_prog_type_to_str(prog_type, &ptype_name))
+ printf("owner_prog_type %s ", ptype_name);
else
printf("owner_prog_type %d ", prog_type);
}
@@ -772,6 +732,7 @@ static int do_dump(int argc, char **argv)
unsigned int num_elems = 0;
__u32 len = sizeof(info);
json_writer_t *btf_wtr;
+ const char *mtype_name;
struct btf *btf = NULL;
int err;
int fd;
@@ -813,10 +774,14 @@ static int do_dump(int argc, char **argv)
}
}
+ if (libbpf_map_type_to_str(info.type, &mtype_name)) {
+ p_info("map type name does not exist");
+ goto exit_free;
+ }
if (info.type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY &&
info.value_size != 8)
p_info("Warning: cannot read values from %s map with value_size != 8",
- map_type_name[info.type]);
+ mtype_name);
while (true) {
err = bpf_map_get_next_key(fd, prev_key, key);
if (err) {
@@ -1150,8 +1115,7 @@ static int do_create(int argc, char **argv)
return -1;
}
- attr.map_type = map_type_from_str(*argv);
- if ((int)attr.map_type < 0) {
+ if (libbpf_map_type_from_str(*argv, &attr.map_type)) {
p_err("unrecognized map type: %s", *argv);
return -1;
}
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index 66f04a4846a5..8bbb24339a52 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -196,13 +196,13 @@ static void show_prog_maps(int fd, u32 num_maps)
static void print_prog_json(struct bpf_prog_info *info, int fd)
{
+ const char *ptype_name;
char *memlock;
jsonw_start_object(json_wtr);
jsonw_uint_field(json_wtr, "id", info->id);
- if (info->type < ARRAY_SIZE(prog_type_name))
- jsonw_string_field(json_wtr, "type",
- prog_type_name[info->type]);
+ if (!libbpf_prog_type_to_str(info->type, &ptype_name))
+ jsonw_string_field(json_wtr, "type", ptype_name);
else
jsonw_uint_field(json_wtr, "type", info->type);
@@ -270,11 +270,12 @@ static void print_prog_json(struct bpf_prog_info *info, int fd)
static void print_prog_plain(struct bpf_prog_info *info, int fd)
{
+ const char *ptype_name;
char *memlock;
printf("%u: ", info->id);
- if (info->type < ARRAY_SIZE(prog_type_name))
- printf("%s ", prog_type_name[info->type]);
+ if (!libbpf_prog_type_to_str(info->type, &ptype_name))
+ printf("%s ", ptype_name);
else
printf("type %u ", info->type);
--
2.17.1
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