Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/tools/bpf/bpftool/btf_dumper.c b/tools/bpf/bpftool/btf_dumper.c
index 397e571..0e93107 100644
--- a/tools/bpf/bpftool/btf_dumper.c
+++ b/tools/bpf/bpftool/btf_dumper.c
@@ -4,12 +4,14 @@
#include <ctype.h>
#include <stdio.h> /* for (FILE *) used by json_writer */
#include <string.h>
+#include <unistd.h>
#include <asm/byteorder.h>
#include <linux/bitops.h>
#include <linux/btf.h>
#include <linux/err.h>
+#include <bpf/btf.h>
+#include <bpf/bpf.h>
-#include "btf.h"
#include "json_writer.h"
#include "main.h"
@@ -22,13 +24,102 @@
static int btf_dumper_do_type(const struct btf_dumper *d, __u32 type_id,
__u8 bit_offset, const void *data);
-static void btf_dumper_ptr(const void *data, json_writer_t *jw,
- bool is_plain_text)
+static int btf_dump_func(const struct btf *btf, char *func_sig,
+ const struct btf_type *func_proto,
+ const struct btf_type *func, int pos, int size);
+
+static int dump_prog_id_as_func_ptr(const struct btf_dumper *d,
+ const struct btf_type *func_proto,
+ __u32 prog_id)
{
- if (is_plain_text)
- jsonw_printf(jw, "%p", *(void **)data);
+ struct bpf_prog_info_linear *prog_info = NULL;
+ const struct btf_type *func_type;
+ const char *prog_name = NULL;
+ struct bpf_func_info *finfo;
+ struct btf *prog_btf = NULL;
+ struct bpf_prog_info *info;
+ int prog_fd, func_sig_len;
+ char prog_str[1024];
+
+ /* Get the ptr's func_proto */
+ func_sig_len = btf_dump_func(d->btf, prog_str, func_proto, NULL, 0,
+ sizeof(prog_str));
+ if (func_sig_len == -1)
+ return -1;
+
+ if (!prog_id)
+ goto print;
+
+ /* Get the bpf_prog's name. Obtain from func_info. */
+ prog_fd = bpf_prog_get_fd_by_id(prog_id);
+ if (prog_fd == -1)
+ goto print;
+
+ prog_info = bpf_program__get_prog_info_linear(prog_fd,
+ 1UL << BPF_PROG_INFO_FUNC_INFO);
+ close(prog_fd);
+ if (IS_ERR(prog_info)) {
+ prog_info = NULL;
+ goto print;
+ }
+ info = &prog_info->info;
+
+ if (!info->btf_id || !info->nr_func_info ||
+ btf__get_from_id(info->btf_id, &prog_btf))
+ goto print;
+ finfo = u64_to_ptr(info->func_info);
+ func_type = btf__type_by_id(prog_btf, finfo->type_id);
+ if (!func_type || !btf_is_func(func_type))
+ goto print;
+
+ prog_name = btf__name_by_offset(prog_btf, func_type->name_off);
+
+print:
+ if (!prog_id)
+ snprintf(&prog_str[func_sig_len],
+ sizeof(prog_str) - func_sig_len, " 0");
+ else if (prog_name)
+ snprintf(&prog_str[func_sig_len],
+ sizeof(prog_str) - func_sig_len,
+ " %s/prog_id:%u", prog_name, prog_id);
else
- jsonw_printf(jw, "%lu", *(unsigned long *)data);
+ snprintf(&prog_str[func_sig_len],
+ sizeof(prog_str) - func_sig_len,
+ " <unknown_prog_name>/prog_id:%u", prog_id);
+
+ prog_str[sizeof(prog_str) - 1] = '\0';
+ jsonw_string(d->jw, prog_str);
+ btf__free(prog_btf);
+ free(prog_info);
+ return 0;
+}
+
+static void btf_dumper_ptr(const struct btf_dumper *d,
+ const struct btf_type *t,
+ const void *data)
+{
+ unsigned long value = *(unsigned long *)data;
+ const struct btf_type *ptr_type;
+ __s32 ptr_type_id;
+
+ if (!d->prog_id_as_func_ptr || value > UINT32_MAX)
+ goto print_ptr_value;
+
+ ptr_type_id = btf__resolve_type(d->btf, t->type);
+ if (ptr_type_id < 0)
+ goto print_ptr_value;
+ ptr_type = btf__type_by_id(d->btf, ptr_type_id);
+ if (!ptr_type || !btf_is_func_proto(ptr_type))
+ goto print_ptr_value;
+
+ if (!dump_prog_id_as_func_ptr(d, ptr_type, value))
+ return;
+
+print_ptr_value:
+ if (d->is_plain_text)
+ jsonw_printf(d->jw, "%p", (void *)value);
+ else
+ jsonw_printf(d->jw, "%lu", value);
}
static int btf_dumper_modifier(const struct btf_dumper *d, __u32 type_id,
@@ -43,9 +134,78 @@
return btf_dumper_do_type(d, actual_type_id, bit_offset, data);
}
-static void btf_dumper_enum(const void *data, json_writer_t *jw)
+static int btf_dumper_enum(const struct btf_dumper *d,
+ const struct btf_type *t,
+ const void *data)
{
- jsonw_printf(jw, "%d", *(int *)data);
+ const struct btf_enum *enums = btf_enum(t);
+ __s64 value;
+ __u16 i;
+
+ switch (t->size) {
+ case 8:
+ value = *(__s64 *)data;
+ break;
+ case 4:
+ value = *(__s32 *)data;
+ break;
+ case 2:
+ value = *(__s16 *)data;
+ break;
+ case 1:
+ value = *(__s8 *)data;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ for (i = 0; i < btf_vlen(t); i++) {
+ if (value == enums[i].val) {
+ jsonw_string(d->jw,
+ btf__name_by_offset(d->btf,
+ enums[i].name_off));
+ return 0;
+ }
+ }
+
+ jsonw_int(d->jw, value);
+ return 0;
+}
+
+static bool is_str_array(const struct btf *btf, const struct btf_array *arr,
+ const char *s)
+{
+ const struct btf_type *elem_type;
+ const char *end_s;
+
+ if (!arr->nelems)
+ return false;
+
+ elem_type = btf__type_by_id(btf, arr->type);
+ /* Not skipping typedef. typedef to char does not count as
+ * a string now.
+ */
+ while (elem_type && btf_is_mod(elem_type))
+ elem_type = btf__type_by_id(btf, elem_type->type);
+
+ if (!elem_type || !btf_is_int(elem_type) || elem_type->size != 1)
+ return false;
+
+ if (btf_int_encoding(elem_type) != BTF_INT_CHAR &&
+ strcmp("char", btf__name_by_offset(btf, elem_type->name_off)))
+ return false;
+
+ end_s = s + arr->nelems;
+ while (s < end_s) {
+ if (!*s)
+ return true;
+ if (*s <= 0x1f || *s >= 0x7f)
+ return false;
+ s++;
+ }
+
+ /* '\0' is not found */
+ return false;
}
static int btf_dumper_array(const struct btf_dumper *d, __u32 type_id,
@@ -57,6 +217,11 @@
int ret = 0;
__u32 i;
+ if (is_str_array(d->btf, arr, data)) {
+ jsonw_string(d->jw, data);
+ return 0;
+ }
+
elem_size = btf__resolve_size(d->btf, arr->type);
if (elem_size < 0)
return elem_size;
@@ -106,8 +271,8 @@
}
}
-static void btf_int128_shift(__u64 *print_num, u16 left_shift_bits,
- u16 right_shift_bits)
+static void btf_int128_shift(__u64 *print_num, __u16 left_shift_bits,
+ __u16 right_shift_bits)
{
__u64 upper_num, lower_num;
@@ -366,10 +531,9 @@
case BTF_KIND_ARRAY:
return btf_dumper_array(d, type_id, data);
case BTF_KIND_ENUM:
- btf_dumper_enum(data, d->jw);
- return 0;
+ return btf_dumper_enum(d, t, data);
case BTF_KIND_PTR:
- btf_dumper_ptr(data, d->jw, d->is_plain_text);
+ btf_dumper_ptr(d, t, data);
return 0;
case BTF_KIND_UNKN:
jsonw_printf(d->jw, "(unknown)");
@@ -414,10 +578,6 @@
return -1; \
} while (0)
-static int btf_dump_func(const struct btf *btf, char *func_sig,
- const struct btf_type *func_proto,
- const struct btf_type *func, int pos, int size);
-
static int __btf_dumper_type_only(const struct btf *btf, __u32 type_id,
char *func_sig, int pos, int size)
{
@@ -526,8 +686,15 @@
BTF_PRINT_ARG(", ");
if (arg->type) {
BTF_PRINT_TYPE(arg->type);
- BTF_PRINT_ARG("%s",
- btf__name_by_offset(btf, arg->name_off));
+ if (arg->name_off)
+ BTF_PRINT_ARG("%s",
+ btf__name_by_offset(btf, arg->name_off));
+ else if (pos && func_sig[pos - 1] == ' ')
+ /* Remove unnecessary space for
+ * FUNC_PROTO that does not have
+ * arg->name_off
+ */
+ func_sig[--pos] = '\0';
} else {
BTF_PRINT_ARG("...");
}