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Message-ID: <20221111140040.dpxif3ze446tedqw@sgarzare-redhat> Date: Fri, 11 Nov 2022 15:00:40 +0100 From: Stefano Garzarella <sgarzare@...hat.com> To: Arseniy Krasnov <AVKrasnov@...rdevices.ru> Cc: Stefan Hajnoczi <stefanha@...hat.com>, "Michael S. Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>, "David S. Miller" <davem@...emloft.net>, "edumazet@...gle.com" <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Krasnov Arseniy <oxffffaa@...il.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "virtualization@...ts.linux-foundation.org" <virtualization@...ts.linux-foundation.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, kernel <kernel@...rdevices.ru> Subject: Re: [RFC PATCH v3 08/11] test/vsock: rework message bound test On Sun, Nov 06, 2022 at 07:48:56PM +0000, Arseniy Krasnov wrote: >This updates message bound test making it more complex. Instead of >sending 1 bytes messages with one MSG_EOR bit, it sends messages of >random length(one half of messages are smaller than page size, second >half are bigger) with random number of MSG_EOR bits set. Receiver >also don't know total number of messages. > >Signed-off-by: Arseniy Krasnov <AVKrasnov@...rdevices.ru> >--- > tools/testing/vsock/control.c | 34 +++++++++ > tools/testing/vsock/control.h | 2 + > tools/testing/vsock/util.c | 13 ++++ > tools/testing/vsock/util.h | 1 + > tools/testing/vsock/vsock_test.c | 115 +++++++++++++++++++++++++++---- > 5 files changed, 152 insertions(+), 13 deletions(-) > >diff --git a/tools/testing/vsock/control.c b/tools/testing/vsock/control.c >index 4874872fc5a3..bed1649bdf3d 100644 >--- a/tools/testing/vsock/control.c >+++ b/tools/testing/vsock/control.c >@@ -141,6 +141,40 @@ void control_writeln(const char *str) > timeout_end(); > } > >+void control_writeulong(unsigned long value) >+{ >+ char str[32]; >+ >+ if (snprintf(str, sizeof(str), "%lu", value) >= sizeof(str)) { >+ perror("snprintf"); >+ exit(EXIT_FAILURE); >+ } >+ >+ control_writeln(str); >+} >+ >+unsigned long control_readulong(bool *ok) >+{ >+ unsigned long value; >+ char *str; >+ >+ if (ok) >+ *ok = false; >+ >+ str = control_readln(); >+ >+ if (str == NULL) >+ return 0; >+ >+ value = strtoul(str, NULL, 10); >+ free(str); >+ >+ if (ok) >+ *ok = true; >+ >+ return value; >+} >+ > /* Return the next line from the control socket (without the trailing newline). > * > * The program terminates if a timeout occurs. >diff --git a/tools/testing/vsock/control.h b/tools/testing/vsock/control.h >index 51814b4f9ac1..cdd922dfea68 100644 >--- a/tools/testing/vsock/control.h >+++ b/tools/testing/vsock/control.h >@@ -9,7 +9,9 @@ void control_init(const char *control_host, const char *control_port, > void control_cleanup(void); > void control_writeln(const char *str); > char *control_readln(void); >+unsigned long control_readulong(bool *ok); > void control_expectln(const char *str); > bool control_cmpln(char *line, const char *str, bool fail); >+void control_writeulong(unsigned long value); > > #endif /* CONTROL_H */ >diff --git a/tools/testing/vsock/util.c b/tools/testing/vsock/util.c >index 2acbb7703c6a..351903836774 100644 >--- a/tools/testing/vsock/util.c >+++ b/tools/testing/vsock/util.c >@@ -395,3 +395,16 @@ void skip_test(struct test_case *test_cases, size_t test_cases_len, > > test_cases[test_id].skip = true; > } >+ >+unsigned long djb2(const void *data, size_t len) hash_djb2 maybe it's more understandable >+{ >+ unsigned long hash = 5381; >+ int i = 0; >+ >+ while (i < len) { >+ hash = ((hash << 5) + hash) + ((unsigned char *)data)[i]; >+ i++; >+ } >+ >+ return hash; >+} >diff --git a/tools/testing/vsock/util.h b/tools/testing/vsock/util.h >index a3375ad2fb7f..988cc69a4642 100644 >--- a/tools/testing/vsock/util.h >+++ b/tools/testing/vsock/util.h >@@ -49,4 +49,5 @@ void run_tests(const struct test_case *test_cases, > void list_tests(const struct test_case *test_cases); > void skip_test(struct test_case *test_cases, size_t test_cases_len, > const char *test_id_str); >+unsigned long djb2(const void *data, size_t len); > #endif /* UTIL_H */ >diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c >index bb6d691cb30d..107c11165887 100644 >--- a/tools/testing/vsock/vsock_test.c >+++ b/tools/testing/vsock/vsock_test.c >@@ -284,10 +284,14 @@ static void test_stream_msg_peek_server(const struct test_opts *opts) > close(fd); > } > >-#define MESSAGES_CNT 7 >-#define MSG_EOR_IDX (MESSAGES_CNT / 2) >+#define SOCK_BUF_SIZE (2 * 1024 * 1024) >+#define MAX_MSG_SIZE (32 * 1024) >+ > static void test_seqpacket_msg_bounds_client(const struct test_opts *opts) > { >+ unsigned long curr_hash; >+ int page_size; >+ int msg_count; > int fd; > > fd = vsock_seqpacket_connect(opts->peer_cid, 1234); >@@ -296,18 +300,69 @@ static void test_seqpacket_msg_bounds_client(const struct test_opts *opts) > exit(EXIT_FAILURE); > } > >- /* Send several messages, one with MSG_EOR flag */ >- for (int i = 0; i < MESSAGES_CNT; i++) >- send_byte(fd, 1, (i == MSG_EOR_IDX) ? MSG_EOR : 0); >+ /* Wait, until receiver sets buffer size. */ >+ control_expectln("SRVREADY"); >+ >+ curr_hash = 0; >+ page_size = getpagesize(); >+ msg_count = SOCK_BUF_SIZE / MAX_MSG_SIZE; >+ >+ for (int i = 0; i < msg_count; i++) { >+ ssize_t send_size; >+ size_t buf_size; >+ int flags; >+ void *buf; >+ >+ /* Use "small" buffers and "big" buffers. */ >+ if (i & 1) >+ buf_size = page_size + >+ (rand() % (MAX_MSG_SIZE - page_size)); >+ else >+ buf_size = 1 + (rand() % page_size); >+ >+ buf = malloc(buf_size); >+ >+ if (!buf) { >+ perror("malloc"); >+ exit(EXIT_FAILURE); >+ } >+ >+ /* Set at least one MSG_EOR + some random. */ >+ if (i == (msg_count / 2) || (rand() & 1)) { >+ flags = MSG_EOR; >+ curr_hash++; >+ } else { >+ flags = 0; >+ } >+ >+ send_size = send(fd, buf, buf_size, flags); >+ >+ if (send_size < 0) { >+ perror("send"); >+ exit(EXIT_FAILURE); >+ } >+ >+ if (send_size != buf_size) { >+ fprintf(stderr, "Invalid send size\n"); >+ exit(EXIT_FAILURE); >+ } >+ >+ curr_hash += send_size; >+ curr_hash = djb2(&curr_hash, sizeof(curr_hash)); >+ } > > control_writeln("SENDDONE"); >+ control_writeulong(curr_hash); > close(fd); > } > > static void test_seqpacket_msg_bounds_server(const struct test_opts *opts) > { >+ unsigned long sock_buf_size; >+ unsigned long remote_hash; >+ unsigned long curr_hash; > int fd; >- char buf[16]; >+ char buf[MAX_MSG_SIZE]; > struct msghdr msg = {0}; > struct iovec iov = {0}; > >@@ -317,25 +372,58 @@ static void test_seqpacket_msg_bounds_server(const struct test_opts *opts) > exit(EXIT_FAILURE); > } > >+ sock_buf_size = SOCK_BUF_SIZE; >+ >+ if (setsockopt(fd, AF_VSOCK, SO_VM_SOCKETS_BUFFER_MAX_SIZE, >+ &sock_buf_size, sizeof(sock_buf_size))) { >+ perror("getsockopt"); >+ exit(EXIT_FAILURE); >+ } >+ >+ if (setsockopt(fd, AF_VSOCK, SO_VM_SOCKETS_BUFFER_SIZE, >+ &sock_buf_size, sizeof(sock_buf_size))) { >+ perror("getsockopt"); >+ exit(EXIT_FAILURE); >+ } >+ >+ /* Ready to receive data. */ >+ control_writeln("SRVREADY"); >+ /* Wait, until peer sends whole data. */ > control_expectln("SENDDONE"); > iov.iov_base = buf; > iov.iov_len = sizeof(buf); > msg.msg_iov = &iov; > msg.msg_iovlen = 1; > >- for (int i = 0; i < MESSAGES_CNT; i++) { >- if (recvmsg(fd, &msg, 0) != 1) { >- perror("message bound violated"); >- exit(EXIT_FAILURE); >- } >+ curr_hash = 0; > >- if ((i == MSG_EOR_IDX) ^ !!(msg.msg_flags & MSG_EOR)) { >- perror("MSG_EOR"); >+ while (1) { >+ ssize_t recv_size; >+ >+ recv_size = recvmsg(fd, &msg, 0); >+ >+ if (!recv_size) >+ break; >+ >+ if (recv_size < 0) { >+ perror("recvmsg"); > exit(EXIT_FAILURE); > } >+ >+ if (msg.msg_flags & MSG_EOR) >+ curr_hash++; >+ >+ curr_hash += recv_size; >+ curr_hash = djb2(&curr_hash, sizeof(curr_hash)); > } > > close(fd); >+ remote_hash = control_readulong(NULL); >+ >+ if (curr_hash != remote_hash) { >+ fprintf(stderr, "Message bounds broken\n"); >+ exit(EXIT_FAILURE); >+ } > } > > #define MESSAGE_TRUNC_SZ 32 >@@ -837,6 +925,7 @@ int main(int argc, char **argv) > .peer_cid = VMADDR_CID_ANY, > }; > >+ srand(time(NULL)); > init_signals(); > > for (;;) { >-- >2.35.0
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