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 <dan...@iogearbox.net>
---
samples/bpf/cookie_uid_helper_example.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/samples/bpf/cookie_uid_helper_example.c
b/samples/bpf/cookie_uid_helper_example.c
index 9ce5584..b08ab4e 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,
--
1.9.3
