On 08/02/2018 03:31 AM, Maninder Singh wrote:
> FILE_SZ is defined as (1UL << 35), it will overflow
> for 32 bit system and logic will break.
>
> Signed-off-by: Maninder Singh <maninder1.s@xxxxxxxxxxx>
> Signed-off-by: Vaneet Narang <v.narang@xxxxxxxxxxx>
> ---
> tools/testing/selftests/net/tcp_mmap.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
> index e8c5dff..1d6ca12 100644
> --- a/tools/testing/selftests/net/tcp_mmap.c
> +++ b/tools/testing/selftests/net/tcp_mmap.c
> @@ -85,7 +85,7 @@
> #define MSG_ZEROCOPY 0x4000000
> #endif
>
> -#define FILE_SZ (1UL << 35)
> +#define FILE_SZ (1ULL << 35)
> static int cfg_family = AF_INET6;
> static socklen_t cfg_alen = sizeof(struct sockaddr_in6);
> static int cfg_port = 8787;
> @@ -134,7 +134,7 @@ void hash_zone(void *zone, unsigned int length)
>
> void *child_thread(void *arg)
> {
> - unsigned long total_mmap = 0, total = 0;
> + unsigned long long total_mmap = 0, total = 0;
> struct tcp_zerocopy_receive zc;
> unsigned long delta_usec;
> int flags = MAP_SHARED;
> @@ -316,7 +316,7 @@ int main(int argc, char *argv[])
> {
> struct sockaddr_storage listenaddr, addr;
> unsigned int max_pacing_rate = 0;
> - unsigned long total = 0;
> + unsigned long long total = 0;
> char *host = NULL;
> int fd, c, on = 1;
> char *buffer;
> @@ -431,7 +431,7 @@ int main(int argc, char *argv[])
> zflg = 0;
> }
> while (total < FILE_SZ) {
> - long wr = FILE_SZ - total;
> + unsigned long long wr = FILE_SZ - total;
>
> if (wr > chunk_size)
> wr = chunk_size;
>
What about using more conventional size_t instead of "unsigned long long" ?
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