netdev - Re: [PATCH v2] fix missing map name when creating a eBPF map

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Date:   Tue, 1 Nov 2022 15:09:49 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     mrpre <mrpre@....com>, stephen@...workplumber.org
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH v2] fix missing map name when creating a eBPF map

Hi mrpre,

On 10/30/22 8:32 AM, mrpre wrote:
> Signed-off-by: mrpre <mrpre@....com>

Small form letter: Please indicate iproute2 in subject, add a proper commit message /
bug report and please also use an actual name instead of "mrpre" for the Signed-off-by.

Thanks a lot,
Daniel

> ---
>   lib/bpf_legacy.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/bpf_legacy.c b/lib/bpf_legacy.c
> index 4fabdcc8..0fff035b 100644
> --- a/lib/bpf_legacy.c
> +++ b/lib/bpf_legacy.c
> @@ -1264,7 +1264,7 @@ static int bpf_map_create(enum bpf_map_type type, uint32_t size_key,
>   			  uint32_t size_value, uint32_t max_elem,
>   			  uint32_t flags, int inner_fd, int btf_fd,
>   			  uint32_t ifindex, uint32_t btf_id_key,
> -			  uint32_t btf_id_val)
> +			  uint32_t btf_id_val, const char *name)
>   {
>   	union bpf_attr attr = {};
>   
> @@ -1278,6 +1278,7 @@ static int bpf_map_create(enum bpf_map_type type, uint32_t size_key,
>   	attr.btf_fd = btf_fd;
>   	attr.btf_key_type_id = btf_id_key;
>   	attr.btf_value_type_id = btf_id_val;
> +	strncpy(attr.map_name, name, sizeof(attr.map_name));
>   
>   	return bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
>   }
> @@ -1682,7 +1683,7 @@ probe:
>   	errno = 0;
>   	fd = bpf_map_create(map->type, map->size_key, map->size_value,
>   			    map->max_elem, map->flags, map_inner_fd, ctx->btf_fd,
> -			    ifindex, ext->btf_id_key, ext->btf_id_val);
> +			    ifindex, ext->btf_id_key, ext->btf_id_val, name);
>   
>   	if (fd < 0 || ctx->verbose) {
>   		bpf_map_report(fd, name, map, ctx, map_inner_fd);
>