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authorDavid S. Miller <davem@davemloft.net>2018-08-02 10:55:32 -0700
committerDavid S. Miller <davem@davemloft.net>2018-08-02 10:55:32 -0700
commit89b1698c93a9dee043154f33d96bca9964e705f1 (patch)
treedd9dcb1965baae8edcf0b496aaa6a70609b6fc11 /tools/lib/bpf
parentffd7ce3cd9c294f1ff49ec02cdbd1bc7cb913db6 (diff)
parente30cb13c5a09ff5f043a6570c32e49b063bea6a1 (diff)
downloadlinux-89b1698c93a9dee043154f33d96bca9964e705f1.tar.bz2
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
The BTF conflicts were simple overlapping changes. The virtio_net conflict was an overlap of a fix of statistics counter, happening alongisde a move over to a bonafide statistics structure rather than counting value on the stack. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/lib/bpf')
-rw-r--r--tools/lib/bpf/btf.c46
-rw-r--r--tools/lib/bpf/btf.h10
-rw-r--r--tools/lib/bpf/libbpf.c87
-rw-r--r--tools/lib/bpf/libbpf.h4
4 files changed, 84 insertions, 63 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 03161be094b4..1622a309f169 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -2,7 +2,6 @@
/* Copyright (c) 2018 Facebook */
#include <stdlib.h>
-#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
@@ -32,17 +31,25 @@ struct btf {
struct btf_type **types;
const char *strings;
void *nohdr_data;
- uint32_t nr_types;
- uint32_t types_size;
- uint32_t data_size;
+ __u32 nr_types;
+ __u32 types_size;
+ __u32 data_size;
int fd;
};
+static const char *btf_name_by_offset(const struct btf *btf, __u32 offset)
+{
+ if (offset < btf->hdr->str_len)
+ return &btf->strings[offset];
+ else
+ return NULL;
+}
+
static int btf_add_type(struct btf *btf, struct btf_type *t)
{
if (btf->types_size - btf->nr_types < 2) {
struct btf_type **new_types;
- u32 expand_by, new_size;
+ __u32 expand_by, new_size;
if (btf->types_size == BTF_MAX_NR_TYPES)
return -E2BIG;
@@ -69,7 +76,7 @@ static int btf_add_type(struct btf *btf, struct btf_type *t)
static int btf_parse_hdr(struct btf *btf, btf_print_fn_t err_log)
{
const struct btf_header *hdr = btf->hdr;
- u32 meta_left;
+ __u32 meta_left;
if (btf->data_size < sizeof(struct btf_header)) {
elog("BTF header not found\n");
@@ -148,7 +155,7 @@ static int btf_parse_type_sec(struct btf *btf, btf_print_fn_t err_log)
while (next_type < end_type) {
struct btf_type *t = next_type;
- uint16_t vlen = BTF_INFO_VLEN(t->info);
+ __u16 vlen = BTF_INFO_VLEN(t->info);
int err;
next_type += sizeof(*t);
@@ -187,6 +194,14 @@ static int btf_parse_type_sec(struct btf *btf, btf_print_fn_t err_log)
return 0;
}
+const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 type_id)
+{
+ if (type_id > btf->nr_types)
+ return NULL;
+
+ return btf->types[type_id];
+}
+
static bool btf_type_is_void(const struct btf_type *t)
{
return t == &btf_void || BTF_INFO_KIND(t->info) == BTF_KIND_FWD;
@@ -197,7 +212,7 @@ static bool btf_type_is_void_or_null(const struct btf_type *t)
return !t || btf_type_is_void(t);
}
-static int64_t btf_type_size(const struct btf_type *t)
+static __s64 btf_type_size(const struct btf_type *t)
{
switch (BTF_INFO_KIND(t->info)) {
case BTF_KIND_INT:
@@ -214,12 +229,12 @@ static int64_t btf_type_size(const struct btf_type *t)
#define MAX_RESOLVE_DEPTH 32
-int64_t btf__resolve_size(const struct btf *btf, uint32_t type_id)
+__s64 btf__resolve_size(const struct btf *btf, __u32 type_id)
{
const struct btf_array *array;
const struct btf_type *t;
- uint32_t nelems = 1;
- int64_t size = -1;
+ __u32 nelems = 1;
+ __s64 size = -1;
int i;
t = btf__type_by_id(btf, type_id);
@@ -279,9 +294,9 @@ int btf__resolve_type(const struct btf *btf, __u32 type_id)
return type_id;
}
-int32_t btf__find_by_name(const struct btf *btf, const char *type_name)
+__s32 btf__find_by_name(const struct btf *btf, const char *type_name)
{
- uint32_t i;
+ __u32 i;
if (!strcmp(type_name, "void"))
return 0;
@@ -310,10 +325,9 @@ void btf__free(struct btf *btf)
free(btf);
}
-struct btf *btf__new(uint8_t *data, uint32_t size,
- btf_print_fn_t err_log)
+struct btf *btf__new(__u8 *data, __u32 size, btf_print_fn_t err_log)
{
- uint32_t log_buf_size = 0;
+ __u32 log_buf_size = 0;
char *log_buf = NULL;
struct btf *btf;
int err;
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h
index 24f361d99a5e..dd8a86eab8ca 100644
--- a/tools/lib/bpf/btf.h
+++ b/tools/lib/bpf/btf.h
@@ -4,19 +4,21 @@
#ifndef __BPF_BTF_H
#define __BPF_BTF_H
-#include <stdint.h>
+#include <linux/types.h>
#define BTF_ELF_SEC ".BTF"
struct btf;
+struct btf_type;
typedef int (*btf_print_fn_t)(const char *, ...)
__attribute__((format(printf, 1, 2)));
void btf__free(struct btf *btf);
-struct btf *btf__new(uint8_t *data, uint32_t size, btf_print_fn_t err_log);
-int32_t btf__find_by_name(const struct btf *btf, const char *type_name);
-int64_t btf__resolve_size(const struct btf *btf, uint32_t type_id);
+struct btf *btf__new(__u8 *data, __u32 size, btf_print_fn_t err_log);
+__s32 btf__find_by_name(const struct btf *btf, const char *type_name);
+const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 id);
+__s64 btf__resolve_size(const struct btf *btf, __u32 type_id);
int btf__resolve_type(const struct btf *btf, __u32 type_id);
int btf__fd(const struct btf *btf);
const char *btf__name_by_offset(const struct btf *btf, __u32 offset);
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 955f8eafbf41..26e9527ee464 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -37,6 +37,7 @@
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/bpf.h>
+#include <linux/btf.h>
#include <linux/list.h>
#include <linux/limits.h>
#include <sys/stat.h>
@@ -170,8 +171,8 @@ struct bpf_map {
size_t offset;
int map_ifindex;
struct bpf_map_def def;
- uint32_t btf_key_type_id;
- uint32_t btf_value_type_id;
+ __u32 btf_key_type_id;
+ __u32 btf_value_type_id;
void *priv;
bpf_map_clear_priv_t clear_priv;
};
@@ -969,68 +970,72 @@ bpf_program__collect_reloc(struct bpf_program *prog, GElf_Shdr *shdr,
static int bpf_map_find_btf_info(struct bpf_map *map, const struct btf *btf)
{
+ const struct btf_type *container_type;
+ const struct btf_member *key, *value;
struct bpf_map_def *def = &map->def;
const size_t max_name = 256;
- int64_t key_size, value_size;
- int32_t key_id, value_id;
- char name[max_name];
+ char container_name[max_name];
+ __s64 key_size, value_size;
+ __s32 container_id;
- /* Find key type by name from BTF */
- if (snprintf(name, max_name, "%s_key", map->name) == max_name) {
- pr_warning("map:%s length of BTF key_type:%s_key is too long\n",
+ if (snprintf(container_name, max_name, "____btf_map_%s", map->name) ==
+ max_name) {
+ pr_warning("map:%s length of '____btf_map_%s' is too long\n",
map->name, map->name);
return -EINVAL;
}
- key_id = btf__find_by_name(btf, name);
- if (key_id < 0) {
- pr_debug("map:%s key_type:%s cannot be found in BTF\n",
- map->name, name);
- return key_id;
+ container_id = btf__find_by_name(btf, container_name);
+ if (container_id < 0) {
+ pr_debug("map:%s container_name:%s cannot be found in BTF. Missing BPF_ANNOTATE_KV_PAIR?\n",
+ map->name, container_name);
+ return container_id;
}
- key_size = btf__resolve_size(btf, key_id);
- if (key_size < 0) {
- pr_warning("map:%s key_type:%s cannot get the BTF type_size\n",
- map->name, name);
- return key_size;
+ container_type = btf__type_by_id(btf, container_id);
+ if (!container_type) {
+ pr_warning("map:%s cannot find BTF type for container_id:%u\n",
+ map->name, container_id);
+ return -EINVAL;
}
- if (def->key_size != key_size) {
- pr_warning("map:%s key_type:%s has BTF type_size:%u != key_size:%u\n",
- map->name, name, (unsigned int)key_size, def->key_size);
+ if (BTF_INFO_KIND(container_type->info) != BTF_KIND_STRUCT ||
+ BTF_INFO_VLEN(container_type->info) < 2) {
+ pr_warning("map:%s container_name:%s is an invalid container struct\n",
+ map->name, container_name);
return -EINVAL;
}
- /* Find value type from BTF */
- if (snprintf(name, max_name, "%s_value", map->name) == max_name) {
- pr_warning("map:%s length of BTF value_type:%s_value is too long\n",
- map->name, map->name);
- return -EINVAL;
+ key = (struct btf_member *)(container_type + 1);
+ value = key + 1;
+
+ key_size = btf__resolve_size(btf, key->type);
+ if (key_size < 0) {
+ pr_warning("map:%s invalid BTF key_type_size\n",
+ map->name);
+ return key_size;
}
- value_id = btf__find_by_name(btf, name);
- if (value_id < 0) {
- pr_debug("map:%s value_type:%s cannot be found in BTF\n",
- map->name, name);
- return value_id;
+ if (def->key_size != key_size) {
+ pr_warning("map:%s btf_key_type_size:%u != map_def_key_size:%u\n",
+ map->name, (__u32)key_size, def->key_size);
+ return -EINVAL;
}
- value_size = btf__resolve_size(btf, value_id);
+ value_size = btf__resolve_size(btf, value->type);
if (value_size < 0) {
- pr_warning("map:%s value_type:%s cannot get the BTF type_size\n",
- map->name, name);
+ pr_warning("map:%s invalid BTF value_type_size\n", map->name);
return value_size;
}
if (def->value_size != value_size) {
- pr_warning("map:%s value_type:%s has BTF type_size:%u != value_size:%u\n",
- map->name, name, (unsigned int)value_size, def->value_size);
+ pr_warning("map:%s btf_value_type_size:%u != map_def_value_size:%u\n",
+ map->name, (__u32)value_size, def->value_size);
return -EINVAL;
}
- map->btf_key_type_id = key_id;
- map->btf_value_type_id = value_id;
+ map->btf_key_type_id = key->type;
+ map->btf_value_type_id = value->type;
return 0;
}
@@ -2141,12 +2146,12 @@ const char *bpf_map__name(struct bpf_map *map)
return map ? map->name : NULL;
}
-uint32_t bpf_map__btf_key_type_id(const struct bpf_map *map)
+__u32 bpf_map__btf_key_type_id(const struct bpf_map *map)
{
return map ? map->btf_key_type_id : 0;
}
-uint32_t bpf_map__btf_value_type_id(const struct bpf_map *map)
+__u32 bpf_map__btf_value_type_id(const struct bpf_map *map)
{
return map ? map->btf_value_type_id : 0;
}
@@ -2333,8 +2338,8 @@ bpf_perf_event_read_simple(void *mem, unsigned long size,
volatile struct perf_event_mmap_page *header = mem;
__u64 data_tail = header->data_tail;
__u64 data_head = header->data_head;
+ int ret = LIBBPF_PERF_EVENT_ERROR;
void *base, *begin, *end;
- int ret;
asm volatile("" ::: "memory"); /* in real code it should be smp_rmb() */
if (data_head == data_tail)
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index 1f8fc2060460..413778a93499 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -254,8 +254,8 @@ bpf_map__next(struct bpf_map *map, struct bpf_object *obj);
int bpf_map__fd(struct bpf_map *map);
const struct bpf_map_def *bpf_map__def(struct bpf_map *map);
const char *bpf_map__name(struct bpf_map *map);
-uint32_t bpf_map__btf_key_type_id(const struct bpf_map *map);
-uint32_t bpf_map__btf_value_type_id(const struct bpf_map *map);
+__u32 bpf_map__btf_key_type_id(const struct bpf_map *map);
+__u32 bpf_map__btf_value_type_id(const struct bpf_map *map);
typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *);
int bpf_map__set_priv(struct bpf_map *map, void *priv,