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bpf: sockmap add SK_DROP tests

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Add tests for SK_DROP.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
John Fastabend 2018-03-18 12:58:07 -07:00 committed by Daniel Borkmann
parent 468b3fdea8
commit e6373ce70a
2 changed files with 61 additions and 16 deletions
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15
samples/sockmap/sockmap_kern.c
View File

@ -236,4 +236,19 @@ int bpf_prog9(struct sk_msg_md *msg)
return SK_PASS;
}
SEC("sk_msg7")
int bpf_prog10(struct sk_msg_md *msg)
{
int *bytes, zero = 0;
bytes = bpf_map_lookup_elem(&sock_apply_bytes, &zero);
if (bytes)
bpf_msg_apply_bytes(msg, *bytes);
bytes = bpf_map_lookup_elem(&sock_cork_bytes, &zero);
if (bytes)
bpf_msg_cork_bytes(msg, *bytes);
return SK_DROP;
}
char _license[] SEC("license") = "GPL";

62
samples/sockmap/sockmap_user.c
View File

@ -59,6 +59,7 @@ int txmsg_pass;
int txmsg_noisy;
int txmsg_redir;
int txmsg_redir_noisy;
int txmsg_drop;
int txmsg_apply;
int txmsg_cork;
@ -75,6 +76,7 @@ static const struct option long_options[] = {
{"txmsg_noisy", no_argument, &txmsg_noisy, 1 },
{"txmsg_redir", no_argument, &txmsg_redir, 1 },
{"txmsg_redir_noisy", no_argument, &txmsg_redir_noisy, 1},
{"txmsg_drop", no_argument, &txmsg_drop, 1 },
{"txmsg_apply", required_argument, NULL, 'a'},
{"txmsg_cork", required_argument, NULL, 'k'},
{0, 0, NULL, 0 }
@ -210,9 +212,19 @@ struct msg_stats {
struct timespec end;
};
struct sockmap_options {
int verbose;
bool base;
bool sendpage;
bool data_test;
bool drop_expected;
};
static int msg_loop_sendpage(int fd, int iov_length, int cnt,
struct msg_stats *s)
struct msg_stats *s,
struct sockmap_options *opt)
{
bool drop = opt->drop_expected;
unsigned char k = 0;
FILE *file;
int i, fp;
@ -229,12 +241,18 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt,
for (i = 0; i < cnt; i++) {
int sent = sendfile(fd, fp, NULL, iov_length);
if (sent < 0) {
if (!drop && sent < 0) {
perror("send loop error:");
close(fp);
return sent;
} else if (drop && sent >= 0) {
printf("sendpage loop error expected: %i\n", sent);
close(fp);
return -EIO;
}
s->bytes_sent += sent;
if (sent > 0)
s->bytes_sent += sent;
}
clock_gettime(CLOCK_MONOTONIC, &s->end);
close(fp);
@ -242,12 +260,15 @@ static int msg_loop_sendpage(int fd, int iov_length, int cnt,
}
static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
struct msg_stats *s, bool tx, bool data_test)
struct msg_stats *s, bool tx,
struct sockmap_options *opt)
{
struct msghdr msg = {0};
int err, i, flags = MSG_NOSIGNAL;
struct iovec *iov;
unsigned char k;
bool data_test = opt->data_test;
bool drop = opt->drop_expected;
iov = calloc(iov_count, sizeof(struct iovec));
if (!iov)
@ -281,11 +302,16 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
for (i = 0; i < cnt; i++) {
int sent = sendmsg(fd, &msg, flags);
if (sent < 0) {
if (!drop && sent < 0) {
perror("send loop error:");
goto out_errno;
} else if (drop && sent >= 0) {
printf("send loop error expected: %i\n", sent);
errno = -EIO;
goto out_errno;
}
s->bytes_sent += sent;
if (sent > 0)
s->bytes_sent += sent;
}
clock_gettime(CLOCK_MONOTONIC, &s->end);
} else {
@ -375,13 +401,6 @@ static inline float recvdBps(struct msg_stats s)
return s.bytes_recvd / (s.end.tv_sec - s.start.tv_sec);
}
struct sockmap_options {
int verbose;
bool base;
bool sendpage;
bool data_test;
};
static int sendmsg_test(int iov_count, int iov_buf, int cnt,
struct sockmap_options *opt)
{
@ -399,10 +418,13 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt,
rxpid = fork();
if (rxpid == 0) {
if (opt->drop_expected)
exit(1);
if (opt->sendpage)
iov_count = 1;
err = msg_loop(rx_fd, iov_count, iov_buf,
cnt, &s, false, opt->data_test);
cnt, &s, false, opt);
if (err)
fprintf(stderr,
"msg_loop_rx: iov_count %i iov_buf %i cnt %i err %i\n",
@ -426,10 +448,10 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt,
txpid = fork();
if (txpid == 0) {
if (opt->sendpage)
err = msg_loop_sendpage(c1, iov_buf, cnt, &s);
err = msg_loop_sendpage(c1, iov_buf, cnt, &s, opt);
else
err = msg_loop(c1, iov_count, iov_buf,
cnt, &s, true, opt->data_test);
cnt, &s, true, opt);
if (err)
fprintf(stderr,
@ -674,6 +696,9 @@ run:
tx_prog_fd = prog_fd[5];
else if (txmsg_redir_noisy)
tx_prog_fd = prog_fd[6];
else if (txmsg_drop)
tx_prog_fd = prog_fd[9];
/* apply and cork must be last */
else if (txmsg_apply)
tx_prog_fd = prog_fd[7];
else if (txmsg_cork)
@ -700,6 +725,7 @@ run:
err, strerror(errno));
return err;
}
if (txmsg_redir || txmsg_redir_noisy)
redir_fd = c2;
else
@ -736,6 +762,10 @@ run:
}
}
if (txmsg_drop)
options.drop_expected = true;
if (test == PING_PONG)
err = forever_ping_pong(rate, &options);
else if (test == SENDMSG) {