[bpf-next PATCH v2 12/18] bpf: sockmap sample, add sendfile test

John Fastabend
2018-03-12T19:24:09Z

To exercise TX ULP sendpage implementation we need a test that does
a sendfile. Add sendfile test option here.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
---
samples/sockmap/sockmap_user.c | 70 ++++++++++++++++++++++++++++++++++------
1 file changed, 60 insertions(+), 10 deletions(-)

diff --git a/samples/sockmap/sockmap_user.c b/samples/sockmap/sockmap_user.c
index bbfe3a2..ec624a8 100644
--- a/samples/sockmap/sockmap_user.c
+++ b/samples/sockmap/sockmap_user.c
@@ -29,6 +29,7 @@
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/types.h>
+#include <sys/sendfile.h>

#include <linux/netlink.h>
#include <linux/socket.h>
@@ -67,10 +68,10 @@
{"iov_count", required_argument, NULL, 'i' },
{"length", required_argument, NULL, 'l' },
{"test", required_argument, NULL, 't' },
- {"txmsg", no_argument, &txmsg_pass, 1 },
- {"txmsg_noisy", no_argument, &txmsg_noisy, 1 },
- {"txmsg_redir", no_argument, &txmsg_redir, 1 },
- {"txmsg_redir_noisy", no_argument, &txmsg_redir_noisy, 1},
+ {"txmsg", no_argument, &txmsg_pass, 1 },
+ {"txmsg_noisy", no_argument, &txmsg_noisy, 1 },
+ {"txmsg_redir", no_argument, &txmsg_redir, 1 },
+ {"txmsg_redir_noisy", no_argument, &txmsg_redir_noisy, 1},
{0, 0, NULL, 0 }
};

@@ -204,6 +205,35 @@ struct msg_stats {
struct timespec end;
};

+static int msg_loop_sendpage(int fd, int iov_length, int cnt,
+ struct msg_stats *s)
+{
+ off_t offset = 0;
+ FILE *file;
+ int i, fp;
+
+ file = fopen(".sendpage_tst.tmp", "w+");
+ fseek(file, iov_length * cnt, SEEK_CUR);
+ fprintf(file, "A");
+ fseek(file, 0, SEEK_SET);
+
+ fp = fileno(file);
+ clock_gettime(CLOCK_MONOTONIC, &s->start);
+ for (i = 0; i < cnt; i++) {
+ int sent = sendfile(fd, fp, &offset, iov_length);
+
+ if (sent < 0) {
+ perror("send loop error:");
+ fclose(file);
+ return sent;
+ }
+ s->bytes_sent += sent;
+ }
+ clock_gettime(CLOCK_MONOTONIC, &s->end);
+ fclose(file);
+ return 0;
+}
+
static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
struct msg_stats *s, bool tx)
{
@@ -309,7 +339,7 @@ static inline float recvdBps(struct msg_stats s)
}

static int sendmsg_test(int iov_count, int iov_buf, int cnt,
- int verbose, bool base)
+ int verbose, bool base, bool sendpage)
{
float sent_Bps = 0, recvd_Bps = 0;
int rx_fd, txpid, rxpid, err = 0;
@@ -325,6 +355,8 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt,

rxpid = fork();
if (rxpid == 0) {
+ if (sendpage)
+ iov_count = 1;
err = msg_loop(rx_fd, iov_count, iov_buf, cnt, &s, false);
if (err)
fprintf(stderr,
@@ -348,7 +380,11 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt,

txpid = fork();
if (txpid == 0) {
- err = msg_loop(c1, iov_count, iov_buf, cnt, &s, true);
+ if (sendpage)
+ err = msg_loop_sendpage(c1, iov_buf, cnt, &s);
+ else
+ err = msg_loop(c1, iov_count, iov_buf, cnt, &s, true);
+
if (err)
fprintf(stderr,
"msg_loop_tx: iov_count %i iov_buf %i cnt %i err %i\n",
@@ -452,6 +488,8 @@ enum {
PING_PONG,
SENDMSG,
BASE,
+ BASE_SENDPAGE,
+ SENDPAGE,
};

int main(int argc, char **argv)
@@ -494,6 +532,10 @@ int main(int argc, char **argv)
test = SENDMSG;
} else if (strcmp(optarg, "base") == 0) {
test = BASE;
+ } else if (strcmp(optarg, "base_sendpage") == 0) {
+ test = BASE_SENDPAGE;
+ } else if (strcmp(optarg, "sendpage") == 0) {
+ test = SENDPAGE;
} else {
usage(argv);
return -1;
@@ -533,7 +575,7 @@ int main(int argc, char **argv)
}

/* If base test skip BPF setup */
- if (test == BASE)
+ if (test == BASE || test == BASE_SENDPAGE)
goto run;

/* Attach programs to sockmap */
@@ -599,7 +641,7 @@ int main(int argc, char **argv)
err, strerror(errno));
return err;
}
- if (test == SENDMSG)
+ if (txmsg_redir || txmsg_redir_noisy)
redir_fd = c2;
else
redir_fd = c1;
@@ -615,9 +657,17 @@ int main(int argc, char **argv)
if (test == PING_PONG)
err = forever_ping_pong(rate, verbose);
else if (test == SENDMSG)
- err = sendmsg_test(iov_count, length, rate, verbose, false);
+ err = sendmsg_test(iov_count, length, rate,
+ verbose, false, false);
+ else if (test == SENDPAGE)
+ err = sendmsg_test(iov_count, length, rate,
+ verbose, false, true);
else if (test == BASE)
- err = sendmsg_test(iov_count, length, rate, verbose, true);
+ err = sendmsg_test(iov_count, length, rate,
+ verbose, true, false);
+ else if (test == BASE_SENDPAGE)
+ err = sendmsg_test(iov_count, length, rate,
+ verbose, true, true);
else
fprintf(stderr, "unknown test\n");