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authorJesper Dangaard Brouer2017-05-02 07:32:06 -0500
committerDavid S. Miller2017-05-03 08:30:24 -0500
commit9178b4c17d1b8b21738771d53d999c990e69f538 (patch)
tree31ee4d76035341b8cbab10e224651afb7cc4f53f /samples
parent6979bcc731f9680824a85a9efc43f36d01cec1b2 (diff)
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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.h8
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 {
24 24
25typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx); 25typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx);
26 26
27extern int map_fd[MAX_MAPS];
28extern int prog_fd[MAX_PROGS]; 27extern int prog_fd[MAX_PROGS];
29extern int event_fd[MAX_PROGS]; 28extern int event_fd[MAX_PROGS];
30extern char bpf_log_buf[BPF_LOG_BUF_SIZE]; 29extern char bpf_log_buf[BPF_LOG_BUF_SIZE];
31extern int prog_cnt; 30extern int prog_cnt;
32 31
32/* There is a one-to-one mapping between map_fd[] and map_data[].
33 * The map_data[] just contains more rich info on the given map.
34 */
35extern int map_fd[MAX_MAPS];
36extern struct bpf_map_data map_data[MAX_MAPS];
37extern int map_data_count;
38
33/* parses elf file compiled by llvm .c->.o 39/* parses elf file compiled by llvm .c->.o
34 * . parses 'maps' section and creates maps via BPF syscall 40 * . parses 'maps' section and creates maps via BPF syscall
35 * . parses 'license' section and passes it to syscall 41 * . parses 'license' section and passes it to syscall