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authorToke Høiland-Jørgensen <toke@redhat.com>2020-04-14 16:50:24 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2020-04-15 13:26:08 +0200
commit49b452c382da2c2d1ccee1265cbb92da905c82f7 (patch)
tree940a104c0547f3aa76fb064ec6f8f44eec5b0914 /tools/lib
parent25498a1969bf3687c29c29bbac92821d7a0f8b4a (diff)
libbpf: Fix type of old_fd in bpf_xdp_set_link_opts
The 'old_fd' parameter used for atomic replacement of XDP programs is supposed to be an FD, but was left as a u32 from an earlier iteration of the patch that added it. It was converted to an int when read, so things worked correctly even with negative values, but better change the definition to correctly reflect the intention. Fixes: bd5ca3ef93cd ("libbpf: Add function to set link XDP fd while specifying old program") Reported-by: David Ahern <dsahern@gmail.com> Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: David Ahern <dsahern@gmail.com> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200414145025.182163-1-toke@redhat.com
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/libbpf.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index 44df1d3e7287..f1dacecb1619 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -458,7 +458,7 @@ struct xdp_link_info {
struct bpf_xdp_set_link_opts {
size_t sz;
- __u32 old_fd;
+ int old_fd;
};
#define bpf_xdp_set_link_opts__last_field old_fd