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| author | Daniel Borkmann <daniel@iogearbox.net> | 2017-05-02 00:47:09 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-02 09:29:35 -0400 |
| commit | eb6211d3606971a957fea28f7532687f9d0f93f2 (patch) | |
| tree | 5c59af3a6e75f1882b3e52e793ff147b942fdc0f /samples | |
| parent | e3bf4c61da801c7967d0efff0c3f6b22d2c0e544 (diff) | |
| download | lwn-eb6211d3606971a957fea28f7532687f9d0f93f2.tar.gz lwn-eb6211d3606971a957fea28f7532687f9d0f93f2.zip | |
bpf, samples: fix build warning in cookie_uid_helper_example
Fix the following warnings triggered by 51570a5ab2b7 ("A Sample of
using socket cookie and uid for traffic monitoring"):
In file included from /home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:54:0:
/home/foo/net-next/samples/bpf/cookie_uid_helper_example.c: In function 'prog_load':
/home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:119:27: warning: overflow in implicit constant conversion [-Woverflow]
-32 + offsetof(struct stats, uid)),
^
/home/foo/net-next/samples/bpf/libbpf.h:135:12: note: in definition of macro 'BPF_STX_MEM'
.off = OFF, \
^
/home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:121:27: warning: overflow in implicit constant conversion [-Woverflow]
-32 + offsetof(struct stats, packets), 1),
^
/home/foo/net-next/samples/bpf/libbpf.h:155:12: note: in definition of macro 'BPF_ST_MEM'
.off = OFF, \
^
/home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:129:27: warning: overflow in implicit constant conversion [-Woverflow]
-32 + offsetof(struct stats, bytes)),
^
/home/foo/net-next/samples/bpf/libbpf.h:135:12: note: in definition of macro 'BPF_STX_MEM'
.off = OFF, \
^
HOSTLD /home/foo/net-next/samples/bpf/per_socket_stats_example
Fixes: 51570a5ab2b7 ("A Sample of using socket cookie and uid for traffic monitoring")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/bpf/cookie_uid_helper_example.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/samples/bpf/cookie_uid_helper_example.c b/samples/bpf/cookie_uid_helper_example.c index 9ce55840d61d..b08ab4e88929 100644 --- a/samples/bpf/cookie_uid_helper_example.c +++ b/samples/bpf/cookie_uid_helper_example.c @@ -116,9 +116,9 @@ static void prog_load(void) * is set by directly place a IMM value 1 into the stack. */ BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, - -32 + offsetof(struct stats, uid)), + -32 + (__s16)offsetof(struct stats, uid)), BPF_ST_MEM(BPF_DW, BPF_REG_10, - -32 + offsetof(struct stats, packets), 1), + -32 + (__s16)offsetof(struct stats, packets), 1), /* * __sk_buff is a special struct used for eBPF program to * directly access some sk_buff field. @@ -126,7 +126,7 @@ static void prog_load(void) BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_6, offsetof(struct __sk_buff, len)), BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, - -32 + offsetof(struct stats, bytes)), + -32 + (__s16)offsetof(struct stats, bytes)), /* * add new map entry using BPF_FUNC_map_update_elem, it takes * 4 parameters (R1: map_fd, R2: &socket_cookie, R3: &stats, |