diff options
authorJesper Dangaard Brouer <brouer@redhat.com>2017-05-02 14:32:06 +0200
committerDavid S. Miller <davem@davemloft.net>2017-05-03 09:30:24 -0400
commit9178b4c17d1b8b21738771d53d999c990e69f538 (patch)
parent6979bcc731f9680824a85a9efc43f36d01cec1b2 (diff)
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>
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