diff options
Diffstat (limited to 'tools/bpf/bpftool/map.c')
| -rw-r--r-- | tools/bpf/bpftool/map.c | 132 |
1 files changed, 41 insertions, 91 deletions
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index 7bf38f0e152e..cbd3080e72c7 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -52,28 +52,30 @@ #include "main.h" static 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_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_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_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", }; static bool map_is_per_cpu(__u32 type) @@ -215,70 +217,6 @@ err_end_obj: return ret; } -static int get_btf(struct bpf_map_info *map_info, struct btf **btf) -{ - struct bpf_btf_info btf_info = { 0 }; - __u32 len = sizeof(btf_info); - __u32 last_size; - int btf_fd; - void *ptr; - int err; - - err = 0; - *btf = NULL; - btf_fd = bpf_btf_get_fd_by_id(map_info->btf_id); - if (btf_fd < 0) - return 0; - - /* we won't know btf_size until we call bpf_obj_get_info_by_fd(). so - * let's start with a sane default - 4KiB here - and resize it only if - * bpf_obj_get_info_by_fd() needs a bigger buffer. - */ - btf_info.btf_size = 4096; - last_size = btf_info.btf_size; - ptr = malloc(last_size); - if (!ptr) { - err = -ENOMEM; - goto exit_free; - } - - bzero(ptr, last_size); - btf_info.btf = ptr_to_u64(ptr); - err = bpf_obj_get_info_by_fd(btf_fd, &btf_info, &len); - - if (!err && btf_info.btf_size > last_size) { - void *temp_ptr; - - last_size = btf_info.btf_size; - temp_ptr = realloc(ptr, last_size); - if (!temp_ptr) { - err = -ENOMEM; - goto exit_free; - } - ptr = temp_ptr; - bzero(ptr, last_size); - btf_info.btf = ptr_to_u64(ptr); - err = bpf_obj_get_info_by_fd(btf_fd, &btf_info, &len); - } - - if (err || btf_info.btf_size > last_size) { - err = errno; - goto exit_free; - } - - *btf = btf__new((__u8 *)btf_info.btf, btf_info.btf_size, NULL); - if (IS_ERR(*btf)) { - err = PTR_ERR(*btf); - *btf = NULL; - } - -exit_free: - close(btf_fd); - free(ptr); - - return err; -} - static json_writer_t *get_btf_writer(void) { json_writer_t *jw = jsonw_new(stdout); @@ -383,7 +321,10 @@ static void print_entry_plain(struct bpf_map_info *info, unsigned char *key, printf(single_line ? " " : "\n"); printf("value:%c", break_names ? '\n' : ' '); - fprint_hex(stdout, value, info->value_size, " "); + if (value) + fprint_hex(stdout, value, info->value_size, " "); + else + printf("<no entry>"); printf("\n"); } else { @@ -398,8 +339,11 @@ static void print_entry_plain(struct bpf_map_info *info, unsigned char *key, for (i = 0; i < n; i++) { printf("value (CPU %02d):%c", i, info->value_size > 16 ? '\n' : ' '); - fprint_hex(stdout, value + i * step, - info->value_size, " "); + if (value) + fprint_hex(stdout, value + i * step, + info->value_size, " "); + else + printf("<no entry>"); printf("\n"); } } @@ -731,7 +675,11 @@ static int dump_map_elem(int fd, void *key, void *value, jsonw_string_field(json_wtr, "error", strerror(lookup_errno)); jsonw_end_object(json_wtr); } else { - print_entry_error(map_info, key, strerror(lookup_errno)); + if (errno == ENOENT) + print_entry_plain(map_info, key, NULL); + else + print_entry_error(map_info, key, + strerror(lookup_errno)); } return 0; @@ -765,7 +713,7 @@ static int do_dump(int argc, char **argv) prev_key = NULL; - err = get_btf(&info, &btf); + err = btf_get_from_id(info.btf_id, &btf); if (err) { p_err("failed to get btf"); goto exit_free; @@ -909,7 +857,7 @@ static int do_lookup(int argc, char **argv) } /* here means bpf_map_lookup_elem() succeeded */ - err = get_btf(&info, &btf); + err = btf_get_from_id(info.btf_id, &btf); if (err) { p_err("failed to get btf"); goto exit_free; @@ -1140,6 +1088,8 @@ static int do_create(int argc, char **argv) return -1; } + set_max_rlimit(); + fd = bpf_create_map_xattr(&attr); if (fd < 0) { p_err("map create failed: %s", strerror(errno)); |