From: Jesper Dangaard Brouer Date: Tue, 2 May 2017 12:32:06 +0000 (+0200) Subject: samples/bpf: export map_data[] for more info on maps X-Git-Tag: v4.12-rc1~98^2~21^2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9178b4c17d1b8b21738771d53d999c990e69f538;p=karo-tx-linux.git samples/bpf: export map_data[] for more info on maps Giving *_user.c side tools access to map_data[] provides easier access to information on the maps being loaded. Still provide the guarantee that the order maps are being defined in inside the _kern.c file corresponds with the order in the array. Now user tools are not blind, but can inspect and verify the maps that got loaded from the ELF binary. Signed-off-by: Jesper Dangaard Brouer Signed-off-by: David S. Miller --- diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h index 4d4fd4678a64..ca0563d04744 100644 --- a/samples/bpf/bpf_load.h +++ b/samples/bpf/bpf_load.h @@ -24,12 +24,18 @@ struct bpf_map_data { typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx); -extern int map_fd[MAX_MAPS]; extern int prog_fd[MAX_PROGS]; extern int event_fd[MAX_PROGS]; extern char bpf_log_buf[BPF_LOG_BUF_SIZE]; extern int prog_cnt; +/* There is a one-to-one mapping between map_fd[] and map_data[]. + * The map_data[] just contains more rich info on the given map. + */ +extern int map_fd[MAX_MAPS]; +extern struct bpf_map_data map_data[MAX_MAPS]; +extern int map_data_count; + /* parses elf file compiled by llvm .c->.o * . parses 'maps' section and creates maps via BPF syscall * . parses 'license' section and passes it to syscall