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libbpf: Deprecate bpf_program__load() API

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Mark bpf_program__load() as deprecated ([0]) since v0.6. Also rename few
internal program loading bpf_object helper functions to have more
consistent naming.

  [0] Closes: https://github.com/libbpf/libbpf/issues/301

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211103051449.1884903-1-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2021-11-02 22:14:49 -07:00 committed by Alexei Starovoitov
parent d6b973acd7
commit be2f2d1680
2 changed files with 24 additions and 16 deletions
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34
tools/lib/bpf/libbpf.c
View File

@ -6428,12 +6428,12 @@ static int libbpf_preload_prog(struct bpf_program *prog,
return 0;
}
static int
load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
char *license, __u32 kern_version, int *pfd)
static int bpf_object_load_prog_instance(struct bpf_object *obj, struct bpf_program *prog,
struct bpf_insn *insns, int insns_cnt,
const char *license, __u32 kern_version,
int *prog_fd)
{
struct bpf_prog_load_params load_attr = {};
struct bpf_object *obj = prog->obj;
char *cp, errmsg[STRERR_BUFSIZE];
size_t log_buf_size = 0;
char *log_buf = NULL;
@ -6494,7 +6494,7 @@ load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
if (obj->gen_loader) {
bpf_gen__prog_load(obj->gen_loader, &load_attr,
prog - obj->programs);
*pfd = -1;
*prog_fd = -1;
return 0;
}
retry_load:
@ -6532,7 +6532,7 @@ retry_load:
}
}
*pfd = ret;
*prog_fd = ret;
ret = 0;
goto out;
}
@ -6608,11 +6608,12 @@ static int bpf_program__record_externs(struct bpf_program *prog)
return 0;
}
int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
static int bpf_object_load_prog(struct bpf_object *obj, struct bpf_program *prog,
const char *license, __u32 kern_ver)
{
int err = 0, fd, i;
if (prog->obj->loaded) {
if (obj->loaded) {
pr_warn("prog '%s': can't load after object was loaded\n", prog->name);
return libbpf_err(-EINVAL);
}
@ -6638,9 +6639,10 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
pr_warn("prog '%s': inconsistent nr(%d) != 1\n",
prog->name, prog->instances.nr);
}
if (prog->obj->gen_loader)
if (obj->gen_loader)
bpf_program__record_externs(prog);
err = load_program(prog, prog->insns, prog->insns_cnt,
err = bpf_object_load_prog_instance(obj, prog,
prog->insns, prog->insns_cnt,
license, kern_ver, &fd);
if (!err)
prog->instances.fds[0] = fd;
@ -6669,8 +6671,9 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
continue;
}
err = load_program(prog, result.new_insn_ptr,
result.new_insn_cnt, license, kern_ver, &fd);
err = bpf_object_load_prog_instance(obj, prog,
result.new_insn_ptr, result.new_insn_cnt,
license, kern_ver, &fd);
if (err) {
pr_warn("Loading the %dth instance of program '%s' failed\n",
i, prog->name);
@ -6687,6 +6690,11 @@ out:
return libbpf_err(err);
}
int bpf_program__load(struct bpf_program *prog, const char *license, __u32 kern_ver)
{
return bpf_object_load_prog(prog->obj, prog, license, kern_ver);
}
static int
bpf_object__load_progs(struct bpf_object *obj, int log_level)
{
@ -6710,7 +6718,7 @@ bpf_object__load_progs(struct bpf_object *obj, int log_level)
continue;
}
prog->log_level |= log_level;
err = bpf_program__load(prog, obj->license, obj->kern_version);
err = bpf_object_load_prog(obj, prog, obj->license, obj->kern_version);
if (err)
return err;
}

4
tools/lib/bpf/libbpf.h
View File

@ -262,8 +262,8 @@ LIBBPF_API const struct bpf_insn *bpf_program__insns(const struct bpf_program *p
*/
LIBBPF_API size_t bpf_program__insn_cnt(const struct bpf_program *prog);
LIBBPF_API int bpf_program__load(struct bpf_program *prog, char *license,
__u32 kern_version);
LIBBPF_DEPRECATED_SINCE(0, 6, "use bpf_object__load() instead")
LIBBPF_API int bpf_program__load(struct bpf_program *prog, const char *license, __u32 kern_version);
LIBBPF_API int bpf_program__fd(const struct bpf_program *prog);
LIBBPF_DEPRECATED_SINCE(0, 7, "multi-instance bpf_program support is deprecated")
LIBBPF_API int bpf_program__pin_instance(struct bpf_program *prog,