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tools: test case for TPACKET_V3/TX_RING support

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Add a test case and sample code for (TPACKET_V3, PACKET_TX_RING)

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sowmini Varadhan 2017-01-03 06:31:48 -08:00 committed by David S. Miller
parent 7f953ab2ba
commit fe878cad38
1 changed files with 74 additions and 17 deletions
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91
tools/testing/selftests/net/psock_tpacket.c
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@ -311,20 +311,33 @@ static inline void __v2_tx_user_ready(struct tpacket2_hdr *hdr)
__sync_synchronize();
}
static inline int __v1_v2_tx_kernel_ready(void *base, int version)
static inline int __v3_tx_kernel_ready(struct tpacket3_hdr *hdr)
{
return !(hdr->tp_status & (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING));
}
static inline void __v3_tx_user_ready(struct tpacket3_hdr *hdr)
{
hdr->tp_status = TP_STATUS_SEND_REQUEST;
__sync_synchronize();
}
static inline int __tx_kernel_ready(void *base, int version)
{
switch (version) {
case TPACKET_V1:
return __v1_tx_kernel_ready(base);
case TPACKET_V2:
return __v2_tx_kernel_ready(base);
case TPACKET_V3:
return __v3_tx_kernel_ready(base);
default:
bug_on(1);
return 0;
}
}
static inline void __v1_v2_tx_user_ready(void *base, int version)
static inline void __tx_user_ready(void *base, int version)
{
switch (version) {
case TPACKET_V1:
@ -333,6 +346,9 @@ static inline void __v1_v2_tx_user_ready(void *base, int version)
case TPACKET_V2:
__v2_tx_user_ready(base);
break;
case TPACKET_V3:
__v3_tx_user_ready(base);
break;
}
}
@ -348,7 +364,22 @@ static void __v1_v2_set_packet_loss_discard(int sock)
}
}
static void walk_v1_v2_tx(int sock, struct ring *ring)
static inline void *get_next_frame(struct ring *ring, int n)
{
uint8_t *f0 = ring->rd[0].iov_base;
switch (ring->version) {
case TPACKET_V1:
case TPACKET_V2:
return ring->rd[n].iov_base;
case TPACKET_V3:
return f0 + (n * ring->req3.tp_frame_size);
default:
bug_on(1);
}
}
static void walk_tx(int sock, struct ring *ring)
{
struct pollfd pfd;
int rcv_sock, ret;
@ -360,9 +391,19 @@ static void walk_v1_v2_tx(int sock, struct ring *ring)
.sll_family = PF_PACKET,
.sll_halen = ETH_ALEN,
};
int nframes;
/* TPACKET_V{1,2} sets up the ring->rd* related variables based
* on frames (e.g., rd_num is tp_frame_nr) whereas V3 sets these
* up based on blocks (e.g, rd_num is tp_block_nr)
*/
if (ring->version <= TPACKET_V2)
nframes = ring->rd_num;
else
nframes = ring->req3.tp_frame_nr;
bug_on(ring->type != PACKET_TX_RING);
bug_on(ring->rd_num < NUM_PACKETS);
bug_on(nframes < NUM_PACKETS);
rcv_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (rcv_sock == -1) {
@ -388,10 +429,11 @@ static void walk_v1_v2_tx(int sock, struct ring *ring)
create_payload(packet, &packet_len);
while (total_packets > 0) {
while (__v1_v2_tx_kernel_ready(ring->rd[frame_num].iov_base,
ring->version) &&
void *next = get_next_frame(ring, frame_num);
while (__tx_kernel_ready(next, ring->version) &&
total_packets > 0) {
ppd.raw = ring->rd[frame_num].iov_base;
ppd.raw = next;
switch (ring->version) {
case TPACKET_V1:
@ -413,14 +455,27 @@ static void walk_v1_v2_tx(int sock, struct ring *ring)
packet_len);
total_bytes += ppd.v2->tp_h.tp_snaplen;
break;
case TPACKET_V3: {
struct tpacket3_hdr *tx = next;
tx->tp_snaplen = packet_len;
tx->tp_len = packet_len;
tx->tp_next_offset = 0;
memcpy((uint8_t *)tx + TPACKET3_HDRLEN -
sizeof(struct sockaddr_ll), packet,
packet_len);
total_bytes += tx->tp_snaplen;
break;
}
}
status_bar_update();
total_packets--;
__v1_v2_tx_user_ready(ppd.raw, ring->version);
__tx_user_ready(next, ring->version);
frame_num = (frame_num + 1) % ring->rd_num;
frame_num = (frame_num + 1) % nframes;
}
poll(&pfd, 1, 1);
@ -460,7 +515,7 @@ static void walk_v1_v2(int sock, struct ring *ring)
if (ring->type == PACKET_RX_RING)
walk_v1_v2_rx(sock, ring);
else
walk_v1_v2_tx(sock, ring);
walk_tx(sock, ring);
}
static uint64_t __v3_prev_block_seq_num = 0;
@ -583,7 +638,7 @@ static void walk_v3(int sock, struct ring *ring)
if (ring->type == PACKET_RX_RING)
walk_v3_rx(sock, ring);
else
bug_on(1);
walk_tx(sock, ring);
}
static void __v1_v2_fill(struct ring *ring, unsigned int blocks)
@ -602,12 +657,13 @@ static void __v1_v2_fill(struct ring *ring, unsigned int blocks)
ring->flen = ring->req.tp_frame_size;
}
static void __v3_fill(struct ring *ring, unsigned int blocks)
static void __v3_fill(struct ring *ring, unsigned int blocks, int type)
{
ring->req3.tp_retire_blk_tov = 64;
ring->req3.tp_sizeof_priv = 0;
ring->req3.tp_feature_req_word = TP_FT_REQ_FILL_RXHASH;
if (type == PACKET_RX_RING) {
ring->req3.tp_retire_blk_tov = 64;
ring->req3.tp_sizeof_priv = 0;
ring->req3.tp_feature_req_word = TP_FT_REQ_FILL_RXHASH;
}
ring->req3.tp_block_size = getpagesize() << 2;
ring->req3.tp_frame_size = TPACKET_ALIGNMENT << 7;
ring->req3.tp_block_nr = blocks;
@ -641,7 +697,7 @@ static void setup_ring(int sock, struct ring *ring, int version, int type)
break;
case TPACKET_V3:
__v3_fill(ring, blocks);
__v3_fill(ring, blocks, type);
ret = setsockopt(sock, SOL_PACKET, type, &ring->req3,
sizeof(ring->req3));
break;
@ -796,6 +852,7 @@ int main(void)
ret |= test_tpacket(TPACKET_V2, PACKET_TX_RING);
ret |= test_tpacket(TPACKET_V3, PACKET_RX_RING);
ret |= test_tpacket(TPACKET_V3, PACKET_TX_RING);
if (ret)
return 1;