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authorJesper Dangaard Brouer <brouer@redhat.com>2017-05-02 14:32:01 +0200
committerDavid S. Miller <davem@davemloft.net>2017-05-03 09:30:24 -0400
commit6979bcc731f9680824a85a9efc43f36d01cec1b2 (patch)
tree930220b0624efcd0c0b94e4c3dbaabf85202fc72 /samples/bpf/bpf_load.h
parent156450d9d964447adfb44a231c634d2f5609d110 (diff)
downloadlinux-6979bcc731f9680824a85a9efc43f36d01cec1b2.tar.bz2
samples/bpf: load_bpf.c make callback fixup more flexible
Do this change before others start to use this callback. Change map_perf_test_user.c which seems to be the only user. This patch extends capabilities of commit 9fd63d05f3e8 ("bpf: Allow bpf sample programs (*_user.c) to change bpf_map_def"). Give fixup callback access to struct bpf_map_data, instead of only stuct bpf_map_def. This add flexibility to allow userspace to reassign the map file descriptor. This is very useful when wanting to share maps between several bpf programs. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/bpf_load.h')
-rw-r--r--samples/bpf/bpf_load.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 05822f83173a..4d4fd4678a64 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -15,8 +15,14 @@ struct bpf_map_def {
unsigned int inner_map_idx;
};
-typedef void (*fixup_map_cb)(struct bpf_map_def *map, const char *map_name,
- int idx);
+struct bpf_map_data {
+ int fd;
+ char *name;
+ size_t elf_offset;
+ struct bpf_map_def def;
+};
+
+typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx);
extern int map_fd[MAX_MAPS];
extern int prog_fd[MAX_PROGS];