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-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-cgroup.rst7
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-feature.rst2
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-map.rst2
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-net.rst2
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-perf.rst2
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-prog.rst15
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool.rst2
-rw-r--r--tools/bpf/bpftool/bash-completion/bpftool7
-rw-r--r--tools/bpf/bpftool/btf_dumper.c59
-rw-r--r--tools/bpf/bpftool/cgroup.c10
-rw-r--r--tools/bpf/bpftool/main.h1
-rw-r--r--tools/bpf/bpftool/map.c61
-rw-r--r--tools/bpf/bpftool/prog.c8
-rw-r--r--tools/bpf/bpftool/xlated_dumper.c3
14 files changed, 140 insertions, 41 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
index 9bb9ace54ba8..89b6b10e2183 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
@@ -29,7 +29,7 @@ CGROUP COMMANDS
| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
| *ATTACH_TYPE* := { **ingress** | **egress** | **sock_create** | **sock_ops** | **device** |
| **bind4** | **bind6** | **post_bind4** | **post_bind6** | **connect4** | **connect6** |
-| **sendmsg4** | **sendmsg6** }
+| **sendmsg4** | **sendmsg6** | **sysctl** }
| *ATTACH_FLAGS* := { **multi** | **override** }
DESCRIPTION
@@ -85,7 +85,8 @@ DESCRIPTION
**sendmsg4** call to sendto(2), sendmsg(2), sendmmsg(2) for an
unconnected udp4 socket (since 4.18);
**sendmsg6** call to sendto(2), sendmsg(2), sendmmsg(2) for an
- unconnected udp6 socket (since 4.18).
+ unconnected udp6 socket (since 4.18);
+ **sysctl** sysctl access (since 5.2).
**bpftool cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
Detach *PROG* from the cgroup *CGROUP* and attach type
@@ -99,7 +100,7 @@ OPTIONS
-h, --help
Print short generic help message (similar to **bpftool help**).
- -v, --version
+ -V, --version
Print version number (similar to **bpftool version**).
-j, --json
diff --git a/tools/bpf/bpftool/Documentation/bpftool-feature.rst b/tools/bpf/bpftool/Documentation/bpftool-feature.rst
index 82de03dd8f52..10177343b7ce 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-feature.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-feature.rst
@@ -63,7 +63,7 @@ OPTIONS
-h, --help
Print short generic help message (similar to **bpftool help**).
- -v, --version
+ -V, --version
Print version number (similar to **bpftool version**).
-j, --json
diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst
index 5c984ffc9f01..55ecf80ca03e 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-map.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst
@@ -135,7 +135,7 @@ OPTIONS
-h, --help
Print short generic help message (similar to **bpftool help**).
- -v, --version
+ -V, --version
Print version number (similar to **bpftool version**).
-j, --json
diff --git a/tools/bpf/bpftool/Documentation/bpftool-net.rst b/tools/bpf/bpftool/Documentation/bpftool-net.rst
index 779dab3650ee..6b692b428373 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-net.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-net.rst
@@ -55,7 +55,7 @@ OPTIONS
-h, --help
Print short generic help message (similar to **bpftool help**).
- -v, --version
+ -V, --version
Print version number (similar to **bpftool version**).
-j, --json
diff --git a/tools/bpf/bpftool/Documentation/bpftool-perf.rst b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
index bca5590a80d0..86154740fabb 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-perf.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
@@ -43,7 +43,7 @@ OPTIONS
-h, --help
Print short generic help message (similar to **bpftool help**).
- -v, --version
+ -V, --version
Print version number (similar to **bpftool version**).
-j, --json
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index 9386bd6e0396..2f183ffd8351 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -25,7 +25,7 @@ PROG COMMANDS
| **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual** | **linum**}]
| **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes** | **linum**}]
| **bpftool** **prog pin** *PROG* *FILE*
-| **bpftool** **prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
+| **bpftool** **prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*]
| **bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
| **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
| **bpftool** **prog tracelog**
@@ -39,7 +39,8 @@ PROG COMMANDS
| **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
| **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
| **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
-| **cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6**
+| **cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6** |
+| **cgroup/sysctl**
| }
| *ATTACH_TYPE* := {
| **msg_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
@@ -56,6 +57,14 @@ DESCRIPTION
Output will start with program ID followed by program type and
zero or more named attributes (depending on kernel version).
+ Since Linux 5.1 the kernel can collect statistics on BPF
+ programs (such as the total time spent running the program,
+ and the number of times it was run). If available, bpftool
+ shows such statistics. However, the kernel does not collect
+ them by defaults, as it slightly impacts performance on each
+ program run. Activation or deactivation of the feature is
+ performed via the **kernel.bpf_stats_enabled** sysctl knob.
+
**bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** | **linum** }]
Dump eBPF instructions of the program from the kernel. By
default, eBPF will be disassembled and printed to standard
@@ -144,7 +153,7 @@ OPTIONS
-h, --help
Print short generic help message (similar to **bpftool help**).
- -v, --version
+ -V, --version
Print version number (similar to **bpftool version**).
-j, --json
diff --git a/tools/bpf/bpftool/Documentation/bpftool.rst b/tools/bpf/bpftool/Documentation/bpftool.rst
index 4f2188845dd8..deb2ca911ddf 100644
--- a/tools/bpf/bpftool/Documentation/bpftool.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool.rst
@@ -49,7 +49,7 @@ OPTIONS
-h, --help
Print short help message (similar to **bpftool help**).
- -v, --version
+ -V, --version
Print version number (similar to **bpftool version**).
-j, --json
diff --git a/tools/bpf/bpftool/bash-completion/bpftool b/tools/bpf/bpftool/bash-completion/bpftool
index b803827d01e8..9f3ffe1e26ab 100644
--- a/tools/bpf/bpftool/bash-completion/bpftool
+++ b/tools/bpf/bpftool/bash-completion/bpftool
@@ -370,7 +370,8 @@ _bpftool()
lirc_mode2 cgroup/bind4 cgroup/bind6 \
cgroup/connect4 cgroup/connect6 \
cgroup/sendmsg4 cgroup/sendmsg6 \
- cgroup/post_bind4 cgroup/post_bind6" -- \
+ cgroup/post_bind4 cgroup/post_bind6 \
+ cgroup/sysctl" -- \
"$cur" ) )
return 0
;;
@@ -619,7 +620,7 @@ _bpftool()
attach|detach)
local ATTACH_TYPES='ingress egress sock_create sock_ops \
device bind4 bind6 post_bind4 post_bind6 connect4 \
- connect6 sendmsg4 sendmsg6'
+ connect6 sendmsg4 sendmsg6 sysctl'
local ATTACH_FLAGS='multi override'
local PROG_TYPE='id pinned tag'
case $prev in
@@ -629,7 +630,7 @@ _bpftool()
;;
ingress|egress|sock_create|sock_ops|device|bind4|bind6|\
post_bind4|post_bind6|connect4|connect6|sendmsg4|\
- sendmsg6)
+ sendmsg6|sysctl)
COMPREPLY=( $( compgen -W "$PROG_TYPE" -- \
"$cur" ) )
return 0
diff --git a/tools/bpf/bpftool/btf_dumper.c b/tools/bpf/bpftool/btf_dumper.c
index e63bce0755eb..8cafb9b31467 100644
--- a/tools/bpf/bpftool/btf_dumper.c
+++ b/tools/bpf/bpftool/btf_dumper.c
@@ -309,6 +309,48 @@ static int btf_dumper_struct(const struct btf_dumper *d, __u32 type_id,
return ret;
}
+static int btf_dumper_var(const struct btf_dumper *d, __u32 type_id,
+ __u8 bit_offset, const void *data)
+{
+ const struct btf_type *t = btf__type_by_id(d->btf, type_id);
+ int ret;
+
+ jsonw_start_object(d->jw);
+ jsonw_name(d->jw, btf__name_by_offset(d->btf, t->name_off));
+ ret = btf_dumper_do_type(d, t->type, bit_offset, data);
+ jsonw_end_object(d->jw);
+
+ return ret;
+}
+
+static int btf_dumper_datasec(const struct btf_dumper *d, __u32 type_id,
+ const void *data)
+{
+ struct btf_var_secinfo *vsi;
+ const struct btf_type *t;
+ int ret = 0, i, vlen;
+
+ t = btf__type_by_id(d->btf, type_id);
+ if (!t)
+ return -EINVAL;
+
+ vlen = BTF_INFO_VLEN(t->info);
+ vsi = (struct btf_var_secinfo *)(t + 1);
+
+ jsonw_start_object(d->jw);
+ jsonw_name(d->jw, btf__name_by_offset(d->btf, t->name_off));
+ jsonw_start_array(d->jw);
+ for (i = 0; i < vlen; i++) {
+ ret = btf_dumper_do_type(d, vsi[i].type, 0, data + vsi[i].offset);
+ if (ret)
+ break;
+ }
+ jsonw_end_array(d->jw);
+ jsonw_end_object(d->jw);
+
+ return ret;
+}
+
static int btf_dumper_do_type(const struct btf_dumper *d, __u32 type_id,
__u8 bit_offset, const void *data)
{
@@ -341,6 +383,10 @@ static int btf_dumper_do_type(const struct btf_dumper *d, __u32 type_id,
case BTF_KIND_CONST:
case BTF_KIND_RESTRICT:
return btf_dumper_modifier(d, type_id, bit_offset, data);
+ case BTF_KIND_VAR:
+ return btf_dumper_var(d, type_id, bit_offset, data);
+ case BTF_KIND_DATASEC:
+ return btf_dumper_datasec(d, type_id, data);
default:
jsonw_printf(d->jw, "(unsupported-kind");
return -EINVAL;
@@ -377,6 +423,7 @@ static int __btf_dumper_type_only(const struct btf *btf, __u32 type_id,
{
const struct btf_type *proto_type;
const struct btf_array *array;
+ const struct btf_var *var;
const struct btf_type *t;
if (!type_id) {
@@ -440,6 +487,18 @@ static int __btf_dumper_type_only(const struct btf *btf, __u32 type_id,
if (pos == -1)
return -1;
break;
+ case BTF_KIND_VAR:
+ var = (struct btf_var *)(t + 1);
+ if (var->linkage == BTF_VAR_STATIC)
+ BTF_PRINT_ARG("static ");
+ BTF_PRINT_TYPE(t->type);
+ BTF_PRINT_ARG(" %s",
+ btf__name_by_offset(btf, t->name_off));
+ break;
+ case BTF_KIND_DATASEC:
+ BTF_PRINT_ARG("section (\"%s\") ",
+ btf__name_by_offset(btf, t->name_off));
+ break;
case BTF_KIND_UNKN:
default:
return -1;
diff --git a/tools/bpf/bpftool/cgroup.c b/tools/bpf/bpftool/cgroup.c
index 4b5c8da2a7c0..7e22f115c8c1 100644
--- a/tools/bpf/bpftool/cgroup.c
+++ b/tools/bpf/bpftool/cgroup.c
@@ -25,7 +25,7 @@
" ATTACH_TYPE := { ingress | egress | sock_create |\n" \
" sock_ops | device | bind4 | bind6 |\n" \
" post_bind4 | post_bind6 | connect4 |\n" \
- " connect6 | sendmsg4 | sendmsg6 }"
+ " connect6 | sendmsg4 | sendmsg6 | sysctl }"
static const char * const attach_type_strings[] = {
[BPF_CGROUP_INET_INGRESS] = "ingress",
@@ -41,6 +41,7 @@ static const char * const attach_type_strings[] = {
[BPF_CGROUP_INET6_POST_BIND] = "post_bind6",
[BPF_CGROUP_UDP4_SENDMSG] = "sendmsg4",
[BPF_CGROUP_UDP6_SENDMSG] = "sendmsg6",
+ [BPF_CGROUP_SYSCTL] = "sysctl",
[__MAX_BPF_ATTACH_TYPE] = NULL,
};
@@ -248,6 +249,13 @@ static int do_show_tree_fn(const char *fpath, const struct stat *sb,
for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++)
show_attached_bpf_progs(cgroup_fd, type, ftw->level);
+ if (errno == EINVAL)
+ /* Last attach type does not support query.
+ * Do not report an error for this, especially because batch
+ * mode would stop processing commands.
+ */
+ errno = 0;
+
if (json_output) {
jsonw_end_array(json_wtr);
jsonw_end_object(json_wtr);
diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h
index d7dd84d3c660..1ccc46169a19 100644
--- a/tools/bpf/bpftool/main.h
+++ b/tools/bpf/bpftool/main.h
@@ -73,6 +73,7 @@ static const char * const prog_type_name[] = {
[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",
};
extern const char * const map_type_name[];
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index e0c650d91784..10b6c9d3e525 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -153,11 +153,13 @@ static int do_dump_btf(const struct btf_dumper *d,
/* start of key-value pair */
jsonw_start_object(d->jw);
- jsonw_name(d->jw, "key");
+ if (map_info->btf_key_type_id) {
+ jsonw_name(d->jw, "key");
- ret = btf_dumper_type(d, map_info->btf_key_type_id, key);
- if (ret)
- goto err_end_obj;
+ ret = btf_dumper_type(d, map_info->btf_key_type_id, key);
+ if (ret)
+ goto err_end_obj;
+ }
if (!map_is_per_cpu(map_info->type)) {
jsonw_name(d->jw, "value");
@@ -259,20 +261,20 @@ static void print_entry_json(struct bpf_map_info *info, unsigned char *key,
}
static void print_entry_error(struct bpf_map_info *info, unsigned char *key,
- const char *value)
+ const char *error_msg)
{
- int value_size = strlen(value);
+ int msg_size = strlen(error_msg);
bool single_line, break_names;
- break_names = info->key_size > 16 || value_size > 16;
- single_line = info->key_size + value_size <= 24 && !break_names;
+ break_names = info->key_size > 16 || msg_size > 16;
+ single_line = info->key_size + msg_size <= 24 && !break_names;
printf("key:%c", break_names ? '\n' : ' ');
fprint_hex(stdout, key, info->key_size, " ");
printf(single_line ? " " : "\n");
- printf("value:%c%s", break_names ? '\n' : ' ', value);
+ printf("value:%c%s", break_names ? '\n' : ' ', error_msg);
printf("\n");
}
@@ -296,11 +298,7 @@ static void print_entry_plain(struct bpf_map_info *info, unsigned char *key,
if (info->value_size) {
printf("value:%c", break_names ? '\n' : ' ');
- if (value)
- fprint_hex(stdout, value, info->value_size,
- " ");
- else
- printf("<no entry>");
+ fprint_hex(stdout, value, info->value_size, " ");
}
printf("\n");
@@ -319,11 +317,8 @@ 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' : ' ');
- if (value)
- fprint_hex(stdout, value + i * step,
- info->value_size, " ");
- else
- printf("<no entry>");
+ fprint_hex(stdout, value + i * step,
+ info->value_size, " ");
printf("\n");
}
}
@@ -536,6 +531,9 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
}
close(fd);
+ if (info->btf_id)
+ jsonw_int_field(json_wtr, "btf_id", info->btf_id);
+
if (!hash_empty(map_table.table)) {
struct pinned_obj *obj;
@@ -602,15 +600,19 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
}
close(fd);
- printf("\n");
if (!hash_empty(map_table.table)) {
struct pinned_obj *obj;
hash_for_each_possible(map_table.table, obj, hash, info->id) {
if (obj->id == info->id)
- printf("\tpinned %s\n", obj->path);
+ printf("\n\tpinned %s", obj->path);
}
}
+
+ if (info->btf_id)
+ printf("\n\tbtf_id %d", info->btf_id);
+
+ printf("\n");
return 0;
}
@@ -720,11 +722,16 @@ 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 {
+ const char *msg = NULL;
+
if (errno == ENOENT)
- print_entry_plain(map_info, key, NULL);
- else
- print_entry_error(map_info, key,
- strerror(lookup_errno));
+ msg = "<no entry>";
+ else if (lookup_errno == ENOSPC &&
+ map_info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY)
+ msg = "<cannot read>";
+
+ print_entry_error(map_info, key,
+ msg ? : strerror(lookup_errno));
}
return 0;
@@ -778,6 +785,10 @@ static int do_dump(int argc, char **argv)
}
}
+ 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]);
while (true) {
err = bpf_map_get_next_key(fd, prev_key, key);
if (err) {
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index d2be5a06c339..fc495b27f0fc 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -249,6 +249,9 @@ static void print_prog_json(struct bpf_prog_info *info, int fd)
if (info->nr_map_ids)
show_prog_maps(fd, info->nr_map_ids);
+ if (info->btf_id)
+ jsonw_int_field(json_wtr, "btf_id", info->btf_id);
+
if (!hash_empty(prog_table.table)) {
struct pinned_obj *obj;
@@ -319,6 +322,9 @@ static void print_prog_plain(struct bpf_prog_info *info, int fd)
}
}
+ if (info->btf_id)
+ printf("\n\tbtf_id %d", info->btf_id);
+
printf("\n");
}
@@ -1054,7 +1060,7 @@ static int do_help(int argc, char **argv)
" tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"
" cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"
" lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"
- " sk_reuseport | flow_dissector |\n"
+ " sk_reuseport | flow_dissector | cgroup/sysctl |\n"
" cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
" cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
" cgroup/sendmsg4 | cgroup/sendmsg6 }\n"
diff --git a/tools/bpf/bpftool/xlated_dumper.c b/tools/bpf/bpftool/xlated_dumper.c
index 7073dbe1ff27..0bb17bf88b18 100644
--- a/tools/bpf/bpftool/xlated_dumper.c
+++ b/tools/bpf/bpftool/xlated_dumper.c
@@ -195,6 +195,9 @@ static const char *print_imm(void *private_data,
if (insn->src_reg == BPF_PSEUDO_MAP_FD)
snprintf(dd->scratch_buff, sizeof(dd->scratch_buff),
"map[id:%u]", insn->imm);
+ else if (insn->src_reg == BPF_PSEUDO_MAP_VALUE)
+ snprintf(dd->scratch_buff, sizeof(dd->scratch_buff),
+ "map[id:%u][0]+%u", insn->imm, (insn + 1)->imm);
else
snprintf(dd->scratch_buff, sizeof(dd->scratch_buff),
"0x%llx", (unsigned long long)full_imm);
generated by cgit (git 2.34.1) at 2024-07-08 08:35:08 +0000