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-rw-r--r--tools/lib/bpf/bpf.c186
-rw-r--r--tools/lib/bpf/bpf_helpers.h19
-rw-r--r--tools/lib/bpf/bpf_tracing.h14
-rw-r--r--tools/lib/bpf/btf.c2
-rw-r--r--tools/lib/bpf/btf.h1
-rw-r--r--tools/lib/bpf/libbpf.c104
-rw-r--r--tools/lib/bpf/libbpf.h2
-rw-r--r--tools/lib/bpf/libbpf.map2
-rw-r--r--tools/lib/bpf/libbpf_internal.h3
-rw-r--r--tools/lib/bpf/libbpf_legacy.h2
-rw-r--r--tools/lib/bpf/libbpf_probes.c2
-rw-r--r--tools/lib/bpf/netlink.c3
-rw-r--r--tools/lib/bpf/skel_internal.h33
-rw-r--r--tools/lib/bpf/usdt.bpf.h4
14 files changed, 241 insertions, 136 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index efcc06dafbd9..1d49a0352836 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -84,9 +84,7 @@ static inline int sys_bpf_fd(enum bpf_cmd cmd, union bpf_attr *attr,
return ensure_good_fd(fd);
}
-#define PROG_LOAD_ATTEMPTS 5
-
-static inline int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts)
+int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts)
{
int fd;
@@ -107,7 +105,7 @@ static inline int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int
*/
int probe_memcg_account(void)
{
- const size_t prog_load_attr_sz = offsetofend(union bpf_attr, attach_btf_obj_fd);
+ const size_t attr_sz = offsetofend(union bpf_attr, attach_btf_obj_fd);
struct bpf_insn insns[] = {
BPF_EMIT_CALL(BPF_FUNC_ktime_get_coarse_ns),
BPF_EXIT_INSN(),
@@ -117,13 +115,13 @@ int probe_memcg_account(void)
int prog_fd;
/* attempt loading freplace trying to use custom BTF */
- memset(&attr, 0, prog_load_attr_sz);
+ memset(&attr, 0, attr_sz);
attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
attr.insns = ptr_to_u64(insns);
attr.insn_cnt = insn_cnt;
attr.license = ptr_to_u64("GPL");
- prog_fd = sys_bpf_fd(BPF_PROG_LOAD, &attr, prog_load_attr_sz);
+ prog_fd = sys_bpf_fd(BPF_PROG_LOAD, &attr, attr_sz);
if (prog_fd >= 0) {
close(prog_fd);
return 1;
@@ -183,7 +181,7 @@ int bpf_map_create(enum bpf_map_type map_type,
return libbpf_err(-EINVAL);
attr.map_type = map_type;
- if (map_name)
+ if (map_name && kernel_supports(NULL, FEAT_PROG_NAME))
libbpf_strlcpy(attr.map_name, map_name, sizeof(attr.map_name));
attr.key_size = key_size;
attr.value_size = value_size;
@@ -234,6 +232,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
const struct bpf_insn *insns, size_t insn_cnt,
const struct bpf_prog_load_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, fd_array);
void *finfo = NULL, *linfo = NULL;
const char *func_info, *line_info;
__u32 log_size, log_level, attach_prog_fd, attach_btf_obj_fd;
@@ -253,7 +252,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
if (attempts == 0)
attempts = PROG_LOAD_ATTEMPTS;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.prog_type = prog_type;
attr.expected_attach_type = OPTS_GET(opts, expected_attach_type, 0);
@@ -263,7 +262,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
attr.prog_ifindex = OPTS_GET(opts, prog_ifindex, 0);
attr.kern_version = OPTS_GET(opts, kern_version, 0);
- if (prog_name)
+ if (prog_name && kernel_supports(NULL, FEAT_PROG_NAME))
libbpf_strlcpy(attr.prog_name, prog_name, sizeof(attr.prog_name));
attr.license = ptr_to_u64(license);
@@ -316,7 +315,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
attr.log_level = log_level;
}
- fd = sys_bpf_prog_load(&attr, sizeof(attr), attempts);
+ fd = sys_bpf_prog_load(&attr, attr_sz, attempts);
if (fd >= 0)
return fd;
@@ -356,7 +355,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
break;
}
- fd = sys_bpf_prog_load(&attr, sizeof(attr), attempts);
+ fd = sys_bpf_prog_load(&attr, attr_sz, attempts);
if (fd >= 0)
goto done;
}
@@ -370,7 +369,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
attr.log_size = log_size;
attr.log_level = 1;
- fd = sys_bpf_prog_load(&attr, sizeof(attr), attempts);
+ fd = sys_bpf_prog_load(&attr, attr_sz, attempts);
}
done:
/* free() doesn't affect errno, so we don't need to restore it */
@@ -382,127 +381,136 @@ done:
int bpf_map_update_elem(int fd, const void *key, const void *value,
__u64 flags)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.value = ptr_to_u64(value);
attr.flags = flags;
- ret = sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_lookup_elem(int fd, const void *key, void *value)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.value = ptr_to_u64(value);
- ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.value = ptr_to_u64(value);
attr.flags = flags;
- ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.value = ptr_to_u64(value);
- ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_lookup_and_delete_elem_flags(int fd, const void *key, void *value, __u64 flags)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.value = ptr_to_u64(value);
attr.flags = flags;
- ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_delete_elem(int fd, const void *key)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
- ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_delete_elem_flags(int fd, const void *key, __u64 flags)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.flags = flags;
- ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_get_next_key(int fd, const void *key, void *next_key)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, next_key);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.next_key = ptr_to_u64(next_key);
- ret = sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_map_freeze(int fd)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, map_fd);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_fd = fd;
- ret = sys_bpf(BPF_MAP_FREEZE, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_MAP_FREEZE, &attr, attr_sz);
return libbpf_err_errno(ret);
}
@@ -511,13 +519,14 @@ static int bpf_map_batch_common(int cmd, int fd, void *in_batch,
__u32 *count,
const struct bpf_map_batch_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, batch);
union bpf_attr attr;
int ret;
if (!OPTS_VALID(opts, bpf_map_batch_opts))
return libbpf_err(-EINVAL);
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.batch.map_fd = fd;
attr.batch.in_batch = ptr_to_u64(in_batch);
attr.batch.out_batch = ptr_to_u64(out_batch);
@@ -527,7 +536,7 @@ static int bpf_map_batch_common(int cmd, int fd, void *in_batch,
attr.batch.elem_flags = OPTS_GET(opts, elem_flags, 0);
attr.batch.flags = OPTS_GET(opts, flags, 0);
- ret = sys_bpf(cmd, &attr, sizeof(attr));
+ ret = sys_bpf(cmd, &attr, attr_sz);
*count = attr.batch.count;
return libbpf_err_errno(ret);
@@ -566,14 +575,15 @@ int bpf_map_update_batch(int fd, const void *keys, const void *values, __u32 *co
int bpf_obj_pin(int fd, const char *pathname)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, file_flags);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.pathname = ptr_to_u64((void *)pathname);
attr.bpf_fd = fd;
- ret = sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_OBJ_PIN, &attr, attr_sz);
return libbpf_err_errno(ret);
}
@@ -584,17 +594,18 @@ int bpf_obj_get(const char *pathname)
int bpf_obj_get_opts(const char *pathname, const struct bpf_obj_get_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, file_flags);
union bpf_attr attr;
int fd;
if (!OPTS_VALID(opts, bpf_obj_get_opts))
return libbpf_err(-EINVAL);
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.pathname = ptr_to_u64((void *)pathname);
attr.file_flags = OPTS_GET(opts, file_flags, 0);
- fd = sys_bpf_fd(BPF_OBJ_GET, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_OBJ_GET, &attr, attr_sz);
return libbpf_err_errno(fd);
}
@@ -612,52 +623,50 @@ int bpf_prog_attach_opts(int prog_fd, int target_fd,
enum bpf_attach_type type,
const struct bpf_prog_attach_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, replace_bpf_fd);
union bpf_attr attr;
int ret;
if (!OPTS_VALID(opts, bpf_prog_attach_opts))
return libbpf_err(-EINVAL);
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.target_fd = target_fd;
attr.attach_bpf_fd = prog_fd;
attr.attach_type = type;
attr.attach_flags = OPTS_GET(opts, flags, 0);
attr.replace_bpf_fd = OPTS_GET(opts, replace_prog_fd, 0);
- ret = sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_PROG_ATTACH, &attr, attr_sz);
return libbpf_err_errno(ret);
}
-__attribute__((alias("bpf_prog_attach_opts")))
-int bpf_prog_attach_xattr(int prog_fd, int target_fd,
- enum bpf_attach_type type,
- const struct bpf_prog_attach_opts *opts);
-
int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, replace_bpf_fd);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.target_fd = target_fd;
attr.attach_type = type;
- ret = sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_PROG_DETACH, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, replace_bpf_fd);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.target_fd = target_fd;
attr.attach_bpf_fd = prog_fd;
attr.attach_type = type;
- ret = sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_PROG_DETACH, &attr, attr_sz);
return libbpf_err_errno(ret);
}
@@ -665,6 +674,7 @@ int bpf_link_create(int prog_fd, int target_fd,
enum bpf_attach_type attach_type,
const struct bpf_link_create_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, link_create);
__u32 target_btf_id, iter_info_len;
union bpf_attr attr;
int fd, err;
@@ -683,7 +693,7 @@ int bpf_link_create(int prog_fd, int target_fd,
return libbpf_err(-EINVAL);
}
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.link_create.prog_fd = prog_fd;
attr.link_create.target_fd = target_fd;
attr.link_create.attach_type = attach_type;
@@ -727,7 +737,7 @@ int bpf_link_create(int prog_fd, int target_fd,
break;
}
proceed:
- fd = sys_bpf_fd(BPF_LINK_CREATE, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_LINK_CREATE, &attr, attr_sz);
if (fd >= 0)
return fd;
/* we'll get EINVAL if LINK_CREATE doesn't support attaching fentry
@@ -763,44 +773,47 @@ proceed:
int bpf_link_detach(int link_fd)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, link_detach);
union bpf_attr attr;
int ret;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.link_detach.link_fd = link_fd;
- ret = sys_bpf(BPF_LINK_DETACH, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_LINK_DETACH, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_link_update(int link_fd, int new_prog_fd,
const struct bpf_link_update_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, link_update);
union bpf_attr attr;
int ret;
if (!OPTS_VALID(opts, bpf_link_update_opts))
return libbpf_err(-EINVAL);
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.link_update.link_fd = link_fd;
attr.link_update.new_prog_fd = new_prog_fd;
attr.link_update.flags = OPTS_GET(opts, flags, 0);
attr.link_update.old_prog_fd = OPTS_GET(opts, old_prog_fd, 0);
- ret = sys_bpf(BPF_LINK_UPDATE, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_LINK_UPDATE, &attr, attr_sz);
return libbpf_err_errno(ret);
}
int bpf_iter_create(int link_fd)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, iter_create);
union bpf_attr attr;
int fd;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.iter_create.link_fd = link_fd;
- fd = sys_bpf_fd(BPF_ITER_CREATE, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_ITER_CREATE, &attr, attr_sz);
return libbpf_err_errno(fd);
}
@@ -808,13 +821,14 @@ int bpf_prog_query_opts(int target_fd,
enum bpf_attach_type type,
struct bpf_prog_query_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, query);
union bpf_attr attr;
int ret;
if (!OPTS_VALID(opts, bpf_prog_query_opts))
return libbpf_err(-EINVAL);
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.query.target_fd = target_fd;
attr.query.attach_type = type;
@@ -823,7 +837,7 @@ int bpf_prog_query_opts(int target_fd,
attr.query.prog_ids = ptr_to_u64(OPTS_GET(opts, prog_ids, NULL));
attr.query.prog_attach_flags = ptr_to_u64(OPTS_GET(opts, prog_attach_flags, NULL));
- ret = sys_bpf(BPF_PROG_QUERY, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_PROG_QUERY, &attr, attr_sz);
OPTS_SET(opts, attach_flags, attr.query.attach_flags);
OPTS_SET(opts, prog_cnt, attr.query.prog_cnt);
@@ -852,13 +866,14 @@ int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
int bpf_prog_test_run_opts(int prog_fd, struct bpf_test_run_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, test);
union bpf_attr attr;
int ret;
if (!OPTS_VALID(opts, bpf_test_run_opts))
return libbpf_err(-EINVAL);
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.test.prog_fd = prog_fd;
attr.test.batch_size = OPTS_GET(opts, batch_size, 0);
attr.test.cpu = OPTS_GET(opts, cpu, 0);
@@ -874,7 +889,7 @@ int bpf_prog_test_run_opts(int prog_fd, struct bpf_test_run_opts *opts)
attr.test.data_in = ptr_to_u64(OPTS_GET(opts, data_in, NULL));
attr.test.data_out = ptr_to_u64(OPTS_GET(opts, data_out, NULL));
- ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, attr_sz);
OPTS_SET(opts, data_size_out, attr.test.data_size_out);
OPTS_SET(opts, ctx_size_out, attr.test.ctx_size_out);
@@ -886,13 +901,14 @@ int bpf_prog_test_run_opts(int prog_fd, struct bpf_test_run_opts *opts)
static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, open_flags);
union bpf_attr attr;
int err;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.start_id = start_id;
- err = sys_bpf(cmd, &attr, sizeof(attr));
+ err = sys_bpf(cmd, &attr, attr_sz);
if (!err)
*next_id = attr.next_id;
@@ -921,80 +937,84 @@ int bpf_link_get_next_id(__u32 start_id, __u32 *next_id)
int bpf_prog_get_fd_by_id(__u32 id)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, open_flags);
union bpf_attr attr;
int fd;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.prog_id = id;
- fd = sys_bpf_fd(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_PROG_GET_FD_BY_ID, &attr, attr_sz);
return libbpf_err_errno(fd);
}
int bpf_map_get_fd_by_id(__u32 id)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, open_flags);
union bpf_attr attr;
int fd;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.map_id = id;
- fd = sys_bpf_fd(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_MAP_GET_FD_BY_ID, &attr, attr_sz);
return libbpf_err_errno(fd);
}
int bpf_btf_get_fd_by_id(__u32 id)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, open_flags);
union bpf_attr attr;
int fd;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.btf_id = id;
- fd = sys_bpf_fd(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_BTF_GET_FD_BY_ID, &attr, attr_sz);
return libbpf_err_errno(fd);
}
int bpf_link_get_fd_by_id(__u32 id)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, open_flags);
union bpf_attr attr;
int fd;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.link_id = id;
- fd = sys_bpf_fd(BPF_LINK_GET_FD_BY_ID, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_LINK_GET_FD_BY_ID, &attr, attr_sz);
return libbpf_err_errno(fd);
}
int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, info);
union bpf_attr attr;
int err;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.info.bpf_fd = bpf_fd;
attr.info.info_len = *info_len;
attr.info.info = ptr_to_u64(info);
- err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
-
+ err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, attr_sz);
if (!err)
*info_len = attr.info.info_len;
-
return libbpf_err_errno(err);
}
int bpf_raw_tracepoint_open(const char *name, int prog_fd)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint);
union bpf_attr attr;
int fd;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.raw_tracepoint.name = ptr_to_u64(name);
attr.raw_tracepoint.prog_fd = prog_fd;
- fd = sys_bpf_fd(BPF_RAW_TRACEPOINT_OPEN, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_RAW_TRACEPOINT_OPEN, &attr, attr_sz);
return libbpf_err_errno(fd);
}
@@ -1050,16 +1070,18 @@ int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
__u32 *prog_id, __u32 *fd_type, __u64 *probe_offset,
__u64 *probe_addr)
{
- union bpf_attr attr = {};
+ const size_t attr_sz = offsetofend(union bpf_attr, task_fd_query);
+ union bpf_attr attr;
int err;
+ memset(&attr, 0, attr_sz);
attr.task_fd_query.pid = pid;
attr.task_fd_query.fd = fd;
attr.task_fd_query.flags = flags;
attr.task_fd_query.buf = ptr_to_u64(buf);
attr.task_fd_query.buf_len = *buf_len;
- err = sys_bpf(BPF_TASK_FD_QUERY, &attr, sizeof(attr));
+ err = sys_bpf(BPF_TASK_FD_QUERY, &attr, attr_sz);
*buf_len = attr.task_fd_query.buf_len;
*prog_id = attr.task_fd_query.prog_id;
@@ -1072,30 +1094,32 @@ int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
int bpf_enable_stats(enum bpf_stats_type type)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, enable_stats);
union bpf_attr attr;
int fd;
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.enable_stats.type = type;
- fd = sys_bpf_fd(BPF_ENABLE_STATS, &attr, sizeof(attr));
+ fd = sys_bpf_fd(BPF_ENABLE_STATS, &attr, attr_sz);
return libbpf_err_errno(fd);
}
int bpf_prog_bind_map(int prog_fd, int map_fd,
const struct bpf_prog_bind_opts *opts)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, prog_bind_map);
union bpf_attr attr;
int ret;
if (!OPTS_VALID(opts, bpf_prog_bind_opts))
return libbpf_err(-EINVAL);
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, attr_sz);
attr.prog_bind_map.prog_fd = prog_fd;
attr.prog_bind_map.map_fd = map_fd;
attr.prog_bind_map.flags = OPTS_GET(opts, flags, 0);
- ret = sys_bpf(BPF_PROG_BIND_MAP, &attr, sizeof(attr));
+ ret = sys_bpf(BPF_PROG_BIND_MAP, &attr, attr_sz);
return libbpf_err_errno(ret);
}
diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h
index 7349b16b8e2f..867b734839dd 100644
--- a/tools/lib/bpf/bpf_helpers.h
+++ b/tools/lib/bpf/bpf_helpers.h
@@ -131,7 +131,7 @@
/*
* Helper function to perform a tail call with a constant/immediate map slot.
*/
-#if __clang_major__ >= 8 && defined(__bpf__)
+#if (!defined(__clang__) || __clang_major__ >= 8) && defined(__bpf__)
static __always_inline void
bpf_tail_call_static(void *ctx, const void *map, const __u32 slot)
{
@@ -139,8 +139,8 @@ bpf_tail_call_static(void *ctx, const void *map, const __u32 slot)
__bpf_unreachable();
/*
- * Provide a hard guarantee that LLVM won't optimize setting r2 (map
- * pointer) and r3 (constant map index) from _different paths_ ending
+ * Provide a hard guarantee that the compiler won't optimize setting r2
+ * (map pointer) and r3 (constant map index) from _different paths_ ending
* up at the _same_ call insn as otherwise we won't be able to use the
* jmpq/nopl retpoline-free patching by the x86-64 JIT in the kernel
* given they mismatch. See also d2e4c1e6c294 ("bpf: Constant map key
@@ -148,12 +148,19 @@ bpf_tail_call_static(void *ctx, const void *map, const __u32 slot)
*
* Note on clobber list: we need to stay in-line with BPF calling
* convention, so even if we don't end up using r0, r4, r5, we need
- * to mark them as clobber so that LLVM doesn't end up using them
- * before / after the call.
+ * to mark them as clobber so that the compiler doesn't end up using
+ * them before / after the call.
*/
- asm volatile("r1 = %[ctx]\n\t"
+ asm volatile(
+#ifdef __clang__
+ "r1 = %[ctx]\n\t"
"r2 = %[map]\n\t"
"r3 = %[slot]\n\t"
+#else
+ "mov %%r1,%[ctx]\n\t"
+ "mov %%r2,%[map]\n\t"
+ "mov %%r3,%[slot]\n\t"
+#endif
"call 12"
:: [ctx]"r"(ctx), [map]"r"(map), [slot]"i"(slot)
: "r0", "r1", "r2", "r3", "r4", "r5");
diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h
index 43ca3aff2292..5fdb93da423b 100644
--- a/tools/lib/bpf/bpf_tracing.h
+++ b/tools/lib/bpf/bpf_tracing.h
@@ -426,7 +426,7 @@ struct pt_regs;
*/
#define BPF_PROG(name, args...) \
name(unsigned long long *ctx); \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(unsigned long long *ctx, ##args); \
typeof(name(0)) name(unsigned long long *ctx) \
{ \
@@ -435,7 +435,7 @@ typeof(name(0)) name(unsigned long long *ctx) \
return ____##name(___bpf_ctx_cast(args)); \
_Pragma("GCC diagnostic pop") \
} \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(unsigned long long *ctx, ##args)
struct pt_regs;
@@ -460,7 +460,7 @@ struct pt_regs;
*/
#define BPF_KPROBE(name, args...) \
name(struct pt_regs *ctx); \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(struct pt_regs *ctx, ##args); \
typeof(name(0)) name(struct pt_regs *ctx) \
{ \
@@ -469,7 +469,7 @@ typeof(name(0)) name(struct pt_regs *ctx) \
return ____##name(___bpf_kprobe_args(args)); \
_Pragma("GCC diagnostic pop") \
} \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(struct pt_regs *ctx, ##args)
#define ___bpf_kretprobe_args0() ctx
@@ -484,7 +484,7 @@ ____##name(struct pt_regs *ctx, ##args)
*/
#define BPF_KRETPROBE(name, args...) \
name(struct pt_regs *ctx); \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(struct pt_regs *ctx, ##args); \
typeof(name(0)) name(struct pt_regs *ctx) \
{ \
@@ -540,7 +540,7 @@ static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args)
#define BPF_KSYSCALL(name, args...) \
name(struct pt_regs *ctx); \
extern _Bool LINUX_HAS_SYSCALL_WRAPPER __kconfig; \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(struct pt_regs *ctx, ##args); \
typeof(name(0)) name(struct pt_regs *ctx) \
{ \
@@ -555,7 +555,7 @@ typeof(name(0)) name(struct pt_regs *ctx) \
return ____##name(___bpf_syscall_args(args)); \
_Pragma("GCC diagnostic pop") \
} \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(struct pt_regs *ctx, ##args)
#define BPF_KPROBE_SYSCALL BPF_KSYSCALL
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 2d14f1a52d7a..361131518d63 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -1225,8 +1225,6 @@ int btf__load_into_kernel(struct btf *btf)
return btf_load_into_kernel(btf, NULL, 0, 0);
}
-int btf__load(struct btf *) __attribute__((alias("btf__load_into_kernel")));
-
int btf__fd(const struct btf *btf)
{
return btf->fd;
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h
index 583760df83b4..ae543144ee30 100644
--- a/tools/lib/bpf/btf.h
+++ b/tools/lib/bpf/btf.h
@@ -116,7 +116,6 @@ LIBBPF_API struct btf *btf__parse_raw_split(const char *path, struct btf *base_b
LIBBPF_API struct btf *btf__load_vmlinux_btf(void);
LIBBPF_API struct btf *btf__load_module_btf(const char *module_name, struct btf *vmlinux_btf);
-LIBBPF_API struct btf *libbpf_find_kernel_btf(void);
LIBBPF_API struct btf *btf__load_from_kernel_by_id(__u32 id);
LIBBPF_API struct btf *btf__load_from_kernel_by_id_split(__u32 id, struct btf *base_btf);
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 50d41815f431..3ad139285fad 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -223,13 +223,18 @@ __printf(2, 3)
void libbpf_print(enum libbpf_print_level level, const char *format, ...)
{
va_list args;
+ int old_errno;
if (!__libbpf_pr)
return;
+ old_errno = errno;
+
va_start(args, format);
__libbpf_pr(level, format, args);
va_end(args);
+
+ errno = old_errno;
}
static void pr_perm_msg(int err)
@@ -412,6 +417,7 @@ struct bpf_program {
int fd;
bool autoload;
+ bool autoattach;
bool mark_btf_static;
enum bpf_prog_type type;
enum bpf_attach_type expected_attach_type;
@@ -591,7 +597,6 @@ struct elf_state {
size_t strtabidx;
struct elf_sec_desc *secs;
int sec_cnt;
- int maps_shndx;
int btf_maps_shndx;
__u32 btf_maps_sec_btf_id;
int text_shndx;
@@ -751,6 +756,8 @@ bpf_object__init_prog(struct bpf_object *obj, struct bpf_program *prog,
prog->autoload = true;
}
+ prog->autoattach = true;
+
/* inherit object's log_level */
prog->log_level = obj->log_level;
@@ -1272,7 +1279,6 @@ static struct bpf_object *bpf_object__new(const char *path,
*/
obj->efile.obj_buf = obj_buf;
obj->efile.obj_buf_sz = obj_buf_sz;
- obj->efile.maps_shndx = -1;
obj->efile.btf_maps_shndx = -1;
obj->efile.st_ops_shndx = -1;
obj->kconfig_map_idx = -1;
@@ -1642,6 +1648,10 @@ static int bpf_object__init_global_data_maps(struct bpf_object *obj)
for (sec_idx = 1; sec_idx < obj->efile.sec_cnt; sec_idx++) {
sec_desc = &obj->efile.secs[sec_idx];
+ /* Skip recognized sections with size 0. */
+ if (!sec_desc->data || sec_desc->data->d_size == 0)
+ continue;
+
switch (sec_desc->sec_type) {
case SEC_DATA:
sec_name = elf_sec_name(obj, elf_sec_by_idx(obj, sec_idx));
@@ -3359,7 +3369,8 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
if (err)
return err;
} else if (strcmp(name, "maps") == 0) {
- obj->efile.maps_shndx = idx;
+ pr_warn("elf: legacy map definitions in 'maps' section are not supported by libbpf v1.0+\n");
+ return -ENOTSUP;
} else if (strcmp(name, MAPS_ELF_SEC) == 0) {
obj->efile.btf_maps_shndx = idx;
} else if (strcmp(name, BTF_ELF_SEC) == 0) {
@@ -3891,8 +3902,7 @@ static bool bpf_object__shndx_is_data(const struct bpf_object *obj,
static bool bpf_object__shndx_is_maps(const struct bpf_object *obj,
int shndx)
{
- return shndx == obj->efile.maps_shndx ||
- shndx == obj->efile.btf_maps_shndx;
+ return shndx == obj->efile.btf_maps_shndx;
}
static enum libbpf_map_type
@@ -4277,11 +4287,12 @@ int bpf_map__set_autocreate(struct bpf_map *map, bool autocreate)
int bpf_map__reuse_fd(struct bpf_map *map, int fd)
{
- struct bpf_map_info info = {};
+ struct bpf_map_info info;
__u32 len = sizeof(info), name_len;
int new_fd, err;
char *new_name;
+ memset(&info, 0, len);
err = bpf_obj_get_info_by_fd(fd, &info, &len);
if (err && errno == EINVAL)
err = bpf_get_map_info_from_fdinfo(fd, &info);
@@ -4408,14 +4419,23 @@ static int probe_fd(int fd)
static int probe_kern_prog_name(void)
{
+ const size_t attr_sz = offsetofend(union bpf_attr, prog_name);
struct bpf_insn insns[] = {
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
};
- int ret, insn_cnt = ARRAY_SIZE(insns);
+ union bpf_attr attr;
+ int ret;
+
+ memset(&attr, 0, attr_sz);
+ attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
+ attr.license = ptr_to_u64("GPL");
+ attr.insns = ptr_to_u64(insns);
+ attr.insn_cnt = (__u32)ARRAY_SIZE(insns);
+ libbpf_strlcpy(attr.prog_name, "libbpf_nametest", sizeof(attr.prog_name));
/* make sure loading with name works */
- ret = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, "test", "GPL", insns, insn_cnt, NULL);
+ ret = sys_bpf_prog_load(&attr, attr_sz, PROG_LOAD_ATTEMPTS);
return probe_fd(ret);
}
@@ -4430,7 +4450,7 @@ static int probe_kern_global_data(void)
};
int ret, map, insn_cnt = ARRAY_SIZE(insns);
- map = bpf_map_create(BPF_MAP_TYPE_ARRAY, NULL, sizeof(int), 32, 1, NULL);
+ map = bpf_map_create(BPF_MAP_TYPE_ARRAY, "libbpf_global", sizeof(int), 32, 1, NULL);
if (map < 0) {
ret = -errno;
cp = libbpf_strerror_r(ret, errmsg, sizeof(errmsg));
@@ -4563,7 +4583,7 @@ static int probe_kern_array_mmap(void)
LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = BPF_F_MMAPABLE);
int fd;
- fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, NULL, sizeof(int), sizeof(int), 1, &opts);
+ fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, "libbpf_mmap", sizeof(int), sizeof(int), 1, &opts);
return probe_fd(fd);
}
@@ -4610,7 +4630,7 @@ static int probe_prog_bind_map(void)
};
int ret, map, prog, insn_cnt = ARRAY_SIZE(insns);
- map = bpf_map_create(BPF_MAP_TYPE_ARRAY, NULL, sizeof(int), 32, 1, NULL);
+ map = bpf_map_create(BPF_MAP_TYPE_ARRAY, "libbpf_det_bind", sizeof(int), 32, 1, NULL);
if (map < 0) {
ret = -errno;
cp = libbpf_strerror_r(ret, errmsg, sizeof(errmsg));
@@ -4814,13 +4834,12 @@ bool kernel_supports(const struct bpf_object *obj, enum kern_feature_id feat_id)
static bool map_is_reuse_compat(const struct bpf_map *map, int map_fd)
{
- struct bpf_map_info map_info = {};
+ struct bpf_map_info map_info;
char msg[STRERR_BUFSIZE];
- __u32 map_info_len;
+ __u32 map_info_len = sizeof(map_info);
int err;
- map_info_len = sizeof(map_info);
-
+ memset(&map_info, 0, map_info_len);
err = bpf_obj_get_info_by_fd(map_fd, &map_info, &map_info_len);
if (err && errno == EINVAL)
err = bpf_get_map_info_from_fdinfo(map_fd, &map_info);
@@ -7244,8 +7263,6 @@ static int bpf_object_unload(struct bpf_object *obj)
return 0;
}
-int bpf_object__unload(struct bpf_object *obj) __attribute__((alias("bpf_object_unload")));
-
static int bpf_object__sanitize_maps(struct bpf_object *obj)
{
struct bpf_map *m;
@@ -8298,6 +8315,16 @@ int bpf_program__set_autoload(struct bpf_program *prog, bool autoload)
return 0;
}
+bool bpf_program__autoattach(const struct bpf_program *prog)
+{
+ return prog->autoattach;
+}
+
+void bpf_program__set_autoattach(struct bpf_program *prog, bool autoattach)
+{
+ prog->autoattach = autoattach;
+}
+
const struct bpf_insn *bpf_program__insns(const struct bpf_program *prog)
{
return prog->insns;
@@ -8978,11 +9005,12 @@ int libbpf_find_vmlinux_btf_id(const char *name,
static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd)
{
- struct bpf_prog_info info = {};
+ struct bpf_prog_info info;
__u32 info_len = sizeof(info);
struct btf *btf;
int err;
+ memset(&info, 0, info_len);
err = bpf_obj_get_info_by_fd(attach_prog_fd, &info, &info_len);
if (err) {
pr_warn("failed bpf_obj_get_info_by_fd for FD %d: %d\n",
@@ -9810,13 +9838,16 @@ static int determine_uprobe_retprobe_bit(void)
static int perf_event_open_probe(bool uprobe, bool retprobe, const char *name,
uint64_t offset, int pid, size_t ref_ctr_off)
{
- struct perf_event_attr attr = {};
+ const size_t attr_sz = sizeof(struct perf_event_attr);
+ struct perf_event_attr attr;
char errmsg[STRERR_BUFSIZE];
int type, pfd;
if (ref_ctr_off >= (1ULL << PERF_UPROBE_REF_CTR_OFFSET_BITS))
return -EINVAL;
+ memset(&attr, 0, attr_sz);
+
type = uprobe ? determine_uprobe_perf_type()
: determine_kprobe_perf_type();
if (type < 0) {
@@ -9837,7 +9868,7 @@ static int perf_event_open_probe(bool uprobe, bool retprobe, const char *name,
}
attr.config |= 1 << bit;
}
- attr.size = sizeof(attr);
+ attr.size = attr_sz;
attr.type = type;
attr.config |= (__u64)ref_ctr_off << PERF_UPROBE_REF_CTR_OFFSET_SHIFT;
attr.config1 = ptr_to_u64(name); /* kprobe_func or uprobe_path */
@@ -9936,7 +9967,8 @@ static int determine_kprobe_perf_type_legacy(const char *probe_name, bool retpro
static int perf_event_kprobe_open_legacy(const char *probe_name, bool retprobe,
const char *kfunc_name, size_t offset, int pid)
{
- struct perf_event_attr attr = {};
+ const size_t attr_sz = sizeof(struct perf_event_attr);
+ struct perf_event_attr attr;
char errmsg[STRERR_BUFSIZE];
int type, pfd, err;
@@ -9955,7 +9987,9 @@ static int perf_event_kprobe_open_legacy(const char *probe_name, bool retprobe,
libbpf_strerror_r(err, errmsg, sizeof(errmsg)));
goto err_clean_legacy;
}
- attr.size = sizeof(attr);
+
+ memset(&attr, 0, attr_sz);
+ attr.size = attr_sz;
attr.config = type;
attr.type = PERF_TYPE_TRACEPOINT;
@@ -10412,6 +10446,7 @@ static int determine_uprobe_perf_type_legacy(const char *probe_name, bool retpro
static int perf_event_uprobe_open_legacy(const char *probe_name, bool retprobe,
const char *binary_path, size_t offset, int pid)
{
+ const size_t attr_sz = sizeof(struct perf_event_attr);
struct perf_event_attr attr;
int type, pfd, err;
@@ -10429,8 +10464,8 @@ static int perf_event_uprobe_open_legacy(const char *probe_name, bool retprobe,
goto err_clean_legacy;
}
- memset(&attr, 0, sizeof(attr));
- attr.size = sizeof(attr);
+ memset(&attr, 0, attr_sz);
+ attr.size = attr_sz;
attr.config = type;
attr.type = PERF_TYPE_TRACEPOINT;
@@ -10662,15 +10697,17 @@ static const char *arch_specific_lib_paths(void)
static int resolve_full_path(const char *file, char *result, size_t result_sz)
{
const char *search_paths[3] = {};
- int i;
+ int i, perm;
if (str_has_sfx(file, ".so") || strstr(file, ".so.")) {
search_paths[0] = getenv("LD_LIBRARY_PATH");
search_paths[1] = "/usr/lib64:/usr/lib";
search_paths[2] = arch_specific_lib_paths();
+ perm = R_OK;
} else {
search_paths[0] = getenv("PATH");
search_paths[1] = "/usr/bin:/usr/sbin";
+ perm = R_OK | X_OK;
}
for (i = 0; i < ARRAY_SIZE(search_paths); i++) {
@@ -10689,8 +10726,8 @@ static int resolve_full_path(const char *file, char *result, size_t result_sz)
if (!seg_len)
continue;
snprintf(result, result_sz, "%.*s/%s", seg_len, s, file);
- /* ensure it is an executable file/link */
- if (access(result, R_OK | X_OK) < 0)
+ /* ensure it has required permissions */
+ if (access(result, perm) < 0)
continue;
pr_debug("resolved '%s' to '%s'\n", file, result);
return 0;
@@ -10967,7 +11004,8 @@ static int determine_tracepoint_id(const char *tp_category,
static int perf_event_open_tracepoint(const char *tp_category,
const char *tp_name)
{
- struct perf_event_attr attr = {};
+ const size_t attr_sz = sizeof(struct perf_event_attr);
+ struct perf_event_attr attr;
char errmsg[STRERR_BUFSIZE];
int tp_id, pfd, err;
@@ -10979,8 +11017,9 @@ static int perf_event_open_tracepoint(const char *tp_category,
return tp_id;
}
+ memset(&attr, 0, attr_sz);
attr.type = PERF_TYPE_TRACEPOINT;
- attr.size = sizeof(attr);
+ attr.size = attr_sz;
attr.config = tp_id;
pfd = syscall(__NR_perf_event_open, &attr, -1 /* pid */, 0 /* cpu */,
@@ -11600,12 +11639,15 @@ struct perf_buffer *perf_buffer__new(int map_fd, size_t page_cnt,
void *ctx,
const struct perf_buffer_opts *opts)
{
+ const size_t attr_sz = sizeof(struct perf_event_attr);
struct perf_buffer_params p = {};
- struct perf_event_attr attr = {};
+ struct perf_event_attr attr;
if (!OPTS_VALID(opts, perf_buffer_opts))
return libbpf_err_ptr(-EINVAL);
+ memset(&attr, 0, attr_sz);
+ attr.size = attr_sz;
attr.config = PERF_COUNT_SW_BPF_OUTPUT;
attr.type = PERF_TYPE_SOFTWARE;
attr.sample_type = PERF_SAMPLE_RAW;
@@ -12328,7 +12370,7 @@ int bpf_object__attach_skeleton(struct bpf_object_skeleton *s)
struct bpf_program *prog = *s->progs[i].prog;
struct bpf_link **link = s->progs[i].link;
- if (!prog->autoload)
+ if (!prog->autoload || !prog->autoattach)
continue;
/* auto-attaching not supported for this program */
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index 61493c4cddac..88a1ac34b12a 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -260,6 +260,8 @@ LIBBPF_API const char *bpf_program__name(const struct bpf_program *prog);
LIBBPF_API const char *bpf_program__section_name(const struct bpf_program *prog);
LIBBPF_API bool bpf_program__autoload(const struct bpf_program *prog);
LIBBPF_API int bpf_program__set_autoload(struct bpf_program *prog, bool autoload);
+LIBBPF_API bool bpf_program__autoattach(const struct bpf_program *prog);
+LIBBPF_API void bpf_program__set_autoattach(struct bpf_program *prog, bool autoattach);
struct bpf_insn;
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 119e6e1ea7f1..2b928dc21af0 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -358,6 +358,8 @@ LIBBPF_1.0.0 {
bpf_obj_get_opts;
bpf_prog_query_opts;
bpf_program__attach_ksyscall;
+ bpf_program__autoattach;
+ bpf_program__set_autoattach;
btf__add_enum64;
btf__add_enum64_value;
libbpf_bpf_attach_type_str;
diff --git a/tools/lib/bpf/libbpf_internal.h b/tools/lib/bpf/libbpf_internal.h
index 4135ae0a2bc3..377642ff51fc 100644
--- a/tools/lib/bpf/libbpf_internal.h
+++ b/tools/lib/bpf/libbpf_internal.h
@@ -573,4 +573,7 @@ static inline bool is_pow_of_2(size_t x)
return x && (x & (x - 1)) == 0;
}
+#define PROG_LOAD_ATTEMPTS 5
+int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts);
+
#endif /* __LIBBPF_LIBBPF_INTERNAL_H */
diff --git a/tools/lib/bpf/libbpf_legacy.h b/tools/lib/bpf/libbpf_legacy.h
index 5b7e0155db6a..1e1be467bede 100644
--- a/tools/lib/bpf/libbpf_legacy.h
+++ b/tools/lib/bpf/libbpf_legacy.h
@@ -125,6 +125,8 @@ struct bpf_map;
struct btf;
struct btf_ext;
+LIBBPF_API struct btf *libbpf_find_kernel_btf(void);
+
LIBBPF_API enum bpf_prog_type bpf_program__get_type(const struct bpf_program *prog);
LIBBPF_API enum bpf_attach_type bpf_program__get_expected_attach_type(const struct bpf_program *prog);
LIBBPF_API const char *bpf_map__get_pin_path(const struct bpf_map *map);
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 0b5398786bf3..6d495656f554 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -193,7 +193,7 @@ static int probe_map_create(enum bpf_map_type map_type)
LIBBPF_OPTS(bpf_map_create_opts, opts);
int key_size, value_size, max_entries;
__u32 btf_key_type_id = 0, btf_value_type_id = 0;
- int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err;
+ int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err = 0;
key_size = sizeof(__u32);
value_size = sizeof(__u32);
diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c
index 6c013168032d..35104580870c 100644
--- a/tools/lib/bpf/netlink.c
+++ b/tools/lib/bpf/netlink.c
@@ -587,11 +587,12 @@ static int get_tc_info(struct nlmsghdr *nh, libbpf_dump_nlmsg_t fn,
static int tc_add_fd_and_name(struct libbpf_nla_req *req, int fd)
{
- struct bpf_prog_info info = {};
+ struct bpf_prog_info info;
__u32 info_len = sizeof(info);
char name[256];
int len, ret;
+ memset(&info, 0, info_len);
ret = bpf_obj_get_info_by_fd(fd, &info, &info_len);
if (ret < 0)
return ret;
diff --git a/tools/lib/bpf/skel_internal.h b/tools/lib/bpf/skel_internal.h
index 70adf7b119b9..1e82ab06c3eb 100644
--- a/tools/lib/bpf/skel_internal.h
+++ b/tools/lib/bpf/skel_internal.h
@@ -251,6 +251,29 @@ static inline int skel_map_update_elem(int fd, const void *key,
return skel_sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, attr_sz);
}
+static inline int skel_map_delete_elem(int fd, const void *key)
+{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
+ union bpf_attr attr;
+
+ memset(&attr, 0, attr_sz);
+ attr.map_fd = fd;
+ attr.key = (long)key;
+
+ return skel_sys_bpf(BPF_MAP_DELETE_ELEM, &attr, attr_sz);
+}
+
+static inline int skel_map_get_fd_by_id(__u32 id)
+{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
+ union bpf_attr attr;
+
+ memset(&attr, 0, attr_sz);
+ attr.map_id = id;
+
+ return skel_sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, attr_sz);
+}
+
static inline int skel_raw_tracepoint_open(const char *name, int prog_fd)
{
const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint.prog_fd);
@@ -285,6 +308,8 @@ static inline int skel_link_create(int prog_fd, int target_fd,
static inline int bpf_load_and_run(struct bpf_load_and_run_opts *opts)
{
+ const size_t prog_load_attr_sz = offsetofend(union bpf_attr, fd_array);
+ const size_t test_run_attr_sz = offsetofend(union bpf_attr, test);
int map_fd = -1, prog_fd = -1, key = 0, err;
union bpf_attr attr;
@@ -302,7 +327,7 @@ static inline int bpf_load_and_run(struct bpf_load_and_run_opts *opts)
goto out;
}
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, prog_load_attr_sz);
attr.prog_type = BPF_PROG_TYPE_SYSCALL;
attr.insns = (long) opts->insns;
attr.insn_cnt = opts->insns_sz / sizeof(struct bpf_insn);
@@ -313,18 +338,18 @@ static inline int bpf_load_and_run(struct bpf_load_and_run_opts *opts)
attr.log_size = opts->ctx->log_size;
attr.log_buf = opts->ctx->log_buf;
attr.prog_flags = BPF_F_SLEEPABLE;
- err = prog_fd = skel_sys_bpf(BPF_PROG_LOAD, &attr, sizeof(attr));
+ err = prog_fd = skel_sys_bpf(BPF_PROG_LOAD, &attr, prog_load_attr_sz);
if (prog_fd < 0) {
opts->errstr = "failed to load loader prog";
set_err;
goto out;
}
- memset(&attr, 0, sizeof(attr));
+ memset(&attr, 0, test_run_attr_sz);
attr.test.prog_fd = prog_fd;
attr.test.ctx_in = (long) opts->ctx;
attr.test.ctx_size_in = opts->ctx->sz;
- err = skel_sys_bpf(BPF_PROG_RUN, &attr, sizeof(attr));
+ err = skel_sys_bpf(BPF_PROG_RUN, &attr, test_run_attr_sz);
if (err < 0 || (int)attr.test.retval < 0) {
opts->errstr = "failed to execute loader prog";
if (err < 0) {
diff --git a/tools/lib/bpf/usdt.bpf.h b/tools/lib/bpf/usdt.bpf.h
index 4f2adc0bd6ca..fdfd235e52c4 100644
--- a/tools/lib/bpf/usdt.bpf.h
+++ b/tools/lib/bpf/usdt.bpf.h
@@ -232,7 +232,7 @@ long bpf_usdt_cookie(struct pt_regs *ctx)
*/
#define BPF_USDT(name, args...) \
name(struct pt_regs *ctx); \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(struct pt_regs *ctx, ##args); \
typeof(name(0)) name(struct pt_regs *ctx) \
{ \
@@ -241,7 +241,7 @@ typeof(name(0)) name(struct pt_regs *ctx) \
return ____##name(___bpf_usdt_args(args)); \
_Pragma("GCC diagnostic pop") \
} \
-static __attribute__((always_inline)) typeof(name(0)) \
+static __always_inline typeof(name(0)) \
____##name(struct pt_regs *ctx, ##args)
#endif /* __USDT_BPF_H__ */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.