6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zijian Zhang <zijianzhang@xxxxxxxxxxxxx>
[ Upstream commit ee9b352ce4650ffc0d8ca0ac373d7c009c7e561e ]
Function msg_verify_data should have context of bytes_cnt and k instead of
assuming they are zero. Otherwise, test_sockmap with data integrity test
will report some errors. I also fix the logic related to size and index j
1/ 6 sockmap::txmsg test passthrough:FAIL
2/ 6 sockmap::txmsg test redirect:FAIL
7/12 sockmap::txmsg test apply:FAIL
10/11 sockmap::txmsg test push_data:FAIL
11/17 sockmap::txmsg test pull-data:FAIL
12/ 9 sockmap::txmsg test pop-data:FAIL
13/ 1 sockmap::txmsg test push/pop data:FAIL
...
Pass: 24 Fail: 52
After applying this patch, some of the errors are solved, but for push,
pull and pop, we may need more fixes to msg_verify_data, added a TODO
10/11 sockmap::txmsg test push_data:FAIL
11/17 sockmap::txmsg test pull-data:FAIL
12/ 9 sockmap::txmsg test pop-data:FAIL
...
Pass: 37 Fail: 15
Besides, added a custom errno EDATAINTEGRITY for msg_verify_data, we
shall not ignore the error in txmsg_cork case.
Fixes: 753fb2ee0934 ("bpf: sockmap, add msg_peek tests to test_sockmap")
Fixes: 16edddfe3c5d ("selftests/bpf: test_sockmap, check test failure")
Acked-by: John Fastabend <john.fastabend@xxxxxxxxx>
Signed-off-by: Zijian Zhang <zijianzhang@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241012203731.1248619-2-zijianzhang@xxxxxxxxxxxxx
Signed-off-by: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
tools/testing/selftests/bpf/test_sockmap.c | 30 ++++++++++++++--------
1 file changed, 20 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index a181c0ccf98b2..1a9660554bd2b 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -56,6 +56,8 @@ static void running_handler(int a);
#define BPF_SOCKHASH_FILENAME "test_sockhash_kern.bpf.o"
#define CG_PATH "/sockmap"
+#define EDATAINTEGRITY 2001
+
/* global sockets */
int s1, s2, c1, c2, p1, p2;
int test_cnt;
@@ -509,23 +511,25 @@ static int msg_alloc_iov(struct msghdr *msg,
return -ENOMEM;
}
-static int msg_verify_data(struct msghdr *msg, int size, int chunk_sz)
+/* TODO: Add verification logic for push, pull and pop data */
+static int msg_verify_data(struct msghdr *msg, int size, int chunk_sz,
+ unsigned char *k_p, int *bytes_cnt_p)
{
- int i, j = 0, bytes_cnt = 0;
- unsigned char k = 0;
+ int i, j, bytes_cnt = *bytes_cnt_p;
+ unsigned char k = *k_p;
- for (i = 0; i < msg->msg_iovlen; i++) {
+ for (i = 0, j = 0; i < msg->msg_iovlen && size; i++, j = 0) {
unsigned char *d = msg->msg_iov[i].iov_base;
/* Special case test for skb ingress + ktls */
if (i == 0 && txmsg_ktls_skb) {
if (msg->msg_iov[i].iov_len < 4)
- return -EIO;
+ return -EDATAINTEGRITY;
if (memcmp(d, "PASS", 4) != 0) {
fprintf(stderr,
"detected skb data error with skb ingress update @iov[%i]:%i \"%02x %02x %02x %02x\" != \"PASS\"\n",
i, 0, d[0], d[1], d[2], d[3]);
- return -EIO;
+ return -EDATAINTEGRITY;
}
j = 4; /* advance index past PASS header */
}
@@ -535,7 +539,7 @@ static int msg_verify_data(struct msghdr *msg, int size, int chunk_sz)
fprintf(stderr,
"detected data corruption @iov[%i]:%i %02x != %02x, %02x ?= %02x\n",
i, j, d[j], k - 1, d[j+1], k);
- return -EIO;
+ return -EDATAINTEGRITY;
}
bytes_cnt++;
if (bytes_cnt == chunk_sz) {
@@ -545,6 +549,8 @@ static int msg_verify_data(struct msghdr *msg, int size, int chunk_sz)
size--;
}
}
+ *k_p = k;
+ *bytes_cnt_p = bytes_cnt;
return 0;
}
@@ -601,6 +607,8 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
float total_bytes, txmsg_pop_total;
int fd_flags = O_NONBLOCK;
struct timeval timeout;
+ unsigned char k = 0;
+ int bytes_cnt = 0;
fd_set w;
fcntl(fd, fd_flags);
@@ -695,7 +703,7 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
iov_length * cnt :
iov_length * iov_count;
- errno = msg_verify_data(&msg, recv, chunk_sz);
+ errno = msg_verify_data(&msg, recv, chunk_sz, &k, &bytes_cnt);
if (errno) {
perror("data verify msg failed");
goto out_errno;
@@ -703,7 +711,9 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
if (recvp) {
errno = msg_verify_data(&msg_peek,
recvp,
- chunk_sz);
+ chunk_sz,
+ &k,
+ &bytes_cnt);
if (errno) {
perror("data verify msg_peek failed");
goto out_errno;
@@ -811,7 +821,7 @@ static int sendmsg_test(struct sockmap_options *opt)
s.bytes_sent, sent_Bps, sent_Bps/giga,
s.bytes_recvd, recvd_Bps, recvd_Bps/giga,
peek_flag ? "(peek_msg)" : "");
- if (err && txmsg_cork)
+ if (err && err != -EDATAINTEGRITY && txmsg_cork)
err = 0;
exit(err ? 1 : 0);
} else if (rxpid == -1) {
--
2.43.0
