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| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2017-05-02 14:32:06 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-03 09:30:24 -0400 |
| commit | 9178b4c17d1b8b21738771d53d999c990e69f538 (patch) | |
| tree | 31ee4d76035341b8cbab10e224651afb7cc4f53f /samples | |
| parent | 6979bcc731f9680824a85a9efc43f36d01cec1b2 (diff) | |
| download | lwn-9178b4c17d1b8b21738771d53d999c990e69f538.tar.gz lwn-9178b4c17d1b8b21738771d53d999c990e69f538.zip | |
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 <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/bpf/bpf_load.h | 8 |
1 files changed, 7 insertions, 1 deletions
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 |