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Date: Wed, 29 May 2019 10:27:01 -0700
From: Song Liu <liu.song.a23@...il.com>
To: Andrii Nakryiko <andriin@...com>
Cc: Andrii Nakryiko <andrii.nakryiko@...il.com>,
Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
Alexei Starovoitov <ast@...com>,
Daniel Borkmann <daniel@...earbox.net>,
Kernel Team <kernel-team@...com>
Subject: Re: [PATCH bpf-next 9/9] libbpf: reduce unnecessary line wrapping
On Tue, May 28, 2019 at 6:14 PM Andrii Nakryiko <andriin@...com> wrote:
>
> There are a bunch of lines of code or comments that are unnecessary
> wrapped into multi-lines. Fix that without violating any code
> guidelines.
>
> Signed-off-by: Andrii Nakryiko <andriin@...com>
Acked-by: Song Liu <songliubraving@...com>
> ---
> tools/lib/bpf/libbpf.c | 52 +++++++++++++-----------------------------
> 1 file changed, 16 insertions(+), 36 deletions(-)
>
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 9d9c19a1b2fe..2c576843ea40 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -497,8 +497,7 @@ static struct bpf_object *bpf_object__new(const char *path,
>
> strcpy(obj->path, path);
> /* Using basename() GNU version which doesn't modify arg. */
> - strncpy(obj->name, basename((void *)path),
> - sizeof(obj->name) - 1);
> + strncpy(obj->name, basename((void *)path), sizeof(obj->name) - 1);
> end = strchr(obj->name, '.');
> if (end)
> *end = 0;
> @@ -578,15 +577,13 @@ static int bpf_object__elf_init(struct bpf_object *obj)
> }
>
> if (!obj->efile.elf) {
> - pr_warning("failed to open %s as ELF file\n",
> - obj->path);
> + pr_warning("failed to open %s as ELF file\n", obj->path);
> err = -LIBBPF_ERRNO__LIBELF;
> goto errout;
> }
>
> if (!gelf_getehdr(obj->efile.elf, &obj->efile.ehdr)) {
> - pr_warning("failed to get EHDR from %s\n",
> - obj->path);
> + pr_warning("failed to get EHDR from %s\n", obj->path);
> err = -LIBBPF_ERRNO__FORMAT;
> goto errout;
> }
> @@ -622,18 +619,15 @@ static int bpf_object__check_endianness(struct bpf_object *obj)
> }
>
> static int
> -bpf_object__init_license(struct bpf_object *obj,
> - void *data, size_t size)
> +bpf_object__init_license(struct bpf_object *obj, void *data, size_t size)
> {
> - memcpy(obj->license, data,
> - min(size, sizeof(obj->license) - 1));
> + memcpy(obj->license, data, min(size, sizeof(obj->license) - 1));
> pr_debug("license of %s is %s\n", obj->path, obj->license);
> return 0;
> }
>
> static int
> -bpf_object__init_kversion(struct bpf_object *obj,
> - void *data, size_t size)
> +bpf_object__init_kversion(struct bpf_object *obj, void *data, size_t size)
> {
> __u32 kver;
>
> @@ -643,8 +637,7 @@ bpf_object__init_kversion(struct bpf_object *obj,
> }
> memcpy(&kver, data, sizeof(kver));
> obj->kern_version = kver;
> - pr_debug("kernel version of %s is %x\n", obj->path,
> - obj->kern_version);
> + pr_debug("kernel version of %s is %x\n", obj->path, obj->kern_version);
> return 0;
> }
>
> @@ -800,8 +793,7 @@ bpf_object__init_internal_map(struct bpf_object *obj, struct bpf_map *map,
> def->key_size = sizeof(int);
> def->value_size = data->d_size;
> def->max_entries = 1;
> - def->map_flags = type == LIBBPF_MAP_RODATA ?
> - BPF_F_RDONLY_PROG : 0;
> + def->map_flags = type == LIBBPF_MAP_RODATA ? BPF_F_RDONLY_PROG : 0;
> if (data_buff) {
> *data_buff = malloc(data->d_size);
> if (!*data_buff) {
> @@ -816,8 +808,7 @@ bpf_object__init_internal_map(struct bpf_object *obj, struct bpf_map *map,
> return 0;
> }
>
> -static int
> -bpf_object__init_maps(struct bpf_object *obj, int flags)
> +static int bpf_object__init_maps(struct bpf_object *obj, int flags)
> {
> int i, map_idx, map_def_sz = 0, nr_syms, nr_maps = 0, nr_maps_glob = 0;
> bool strict = !(flags & MAPS_RELAX_COMPAT);
> @@ -1098,8 +1089,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj, int flags)
>
> /* Elf is corrupted/truncated, avoid calling elf_strptr. */
> if (!elf_rawdata(elf_getscn(elf, ep->e_shstrndx), NULL)) {
> - pr_warning("failed to get e_shstrndx from %s\n",
> - obj->path);
> + pr_warning("failed to get e_shstrndx from %s\n", obj->path);
> return -LIBBPF_ERRNO__FORMAT;
> }
>
> @@ -1340,8 +1330,7 @@ bpf_program__collect_reloc(struct bpf_program *prog, GElf_Shdr *shdr,
> size_t nr_maps = obj->nr_maps;
> int i, nrels;
>
> - pr_debug("collecting relocating info for: '%s'\n",
> - prog->section_name);
> + pr_debug("collecting relocating info for: '%s'\n", prog->section_name);
> nrels = shdr->sh_size / shdr->sh_entsize;
>
> prog->reloc_desc = malloc(sizeof(*prog->reloc_desc) * nrels);
> @@ -1366,9 +1355,7 @@ bpf_program__collect_reloc(struct bpf_program *prog, GElf_Shdr *shdr,
> return -LIBBPF_ERRNO__FORMAT;
> }
>
> - if (!gelf_getsym(symbols,
> - GELF_R_SYM(rel.r_info),
> - &sym)) {
> + if (!gelf_getsym(symbols, GELF_R_SYM(rel.r_info), &sym)) {
> pr_warning("relocation: symbol %"PRIx64" not found\n",
> GELF_R_SYM(rel.r_info));
> return -LIBBPF_ERRNO__FORMAT;
> @@ -1817,18 +1804,14 @@ check_btf_ext_reloc_err(struct bpf_program *prog, int err,
> if (btf_prog_info) {
> /*
> * Some info has already been found but has problem
> - * in the last btf_ext reloc. Must have to error
> - * out.
> + * in the last btf_ext reloc. Must have to error out.
> */
> pr_warning("Error in relocating %s for sec %s.\n",
> info_name, prog->section_name);
> return err;
> }
>
> - /*
> - * Have problem loading the very first info. Ignore
> - * the rest.
> - */
> + /* Have problem loading the very first info. Ignore the rest. */
> pr_warning("Cannot find %s for main program sec %s. Ignore all %s.\n",
> info_name, prog->section_name, info_name);
> return 0;
> @@ -2032,9 +2015,7 @@ static int bpf_object__collect_reloc(struct bpf_object *obj)
> return -LIBBPF_ERRNO__RELOC;
> }
>
> - err = bpf_program__collect_reloc(prog,
> - shdr, data,
> - obj);
> + err = bpf_program__collect_reloc(prog, shdr, data, obj);
> if (err)
> return err;
> }
> @@ -2354,8 +2335,7 @@ struct bpf_object *bpf_object__open_buffer(void *obj_buf,
> (unsigned long)obj_buf_sz);
> name = tmp_name;
> }
> - pr_debug("loading object '%s' from buffer\n",
> - name);
> + pr_debug("loading object '%s' from buffer\n", name);
>
> return __bpf_object__open(name, obj_buf, obj_buf_sz, true, true);
> }
> --
> 2.17.1
>
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