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-rw-r--r--icmp.c12
-rw-r--r--passt.h2
-rw-r--r--tap.c24
-rw-r--r--tcp.c51
-rw-r--r--tcp_splice.c10
-rw-r--r--udp.c4
6 files changed, 72 insertions, 31 deletions
diff --git a/icmp.c b/icmp.c
index 94093d2..0eb5bfe 100644
--- a/icmp.c
+++ b/icmp.c
@@ -43,13 +43,13 @@
/**
* struct icmp_id_sock - Tracking information for single ICMP echo identifier
* @sock: Bound socket for identifier
- * @ts: Last associated activity from tap, seconds
* @seq: Last sequence number sent to tap, host order
+ * @ts: Last associated activity from tap, seconds
*/
struct icmp_id_sock {
int sock;
- time_t ts;
uint16_t seq;
+ time_t ts;
};
/* Indexed by ICMP echo identifier */
@@ -168,6 +168,10 @@ int icmp_tap_handler(const struct ctx *c, int af, const void *addr,
s = sock_l4(c, AF_INET, IPPROTO_ICMP, id, 0, iref.u32);
if (s < 0)
goto fail_sock;
+ if (s > SOCKET_MAX) {
+ close(s);
+ return 1;
+ }
icmp_id_map[V4][id].sock = s;
}
@@ -201,6 +205,10 @@ int icmp_tap_handler(const struct ctx *c, int af, const void *addr,
iref.u32);
if (s < 0)
goto fail_sock;
+ if (s > SOCKET_MAX) {
+ close(s);
+ return 1;
+ }
icmp_id_map[V6][id].sock = s;
}
diff --git a/passt.h b/passt.h
index 7d40c6f..69e334d 100644
--- a/passt.h
+++ b/passt.h
@@ -63,7 +63,7 @@ union epoll_ref {
};
#define TAP_BUF_BYTES \
- ROUND_DOWN(((ETH_MAX_MTU + sizeof(uint32_t)) * 256), PAGE_SIZE)
+ ROUND_DOWN(((ETH_MAX_MTU + sizeof(uint32_t)) * 128), PAGE_SIZE)
#define TAP_BUF_FILL (TAP_BUF_BYTES - ETH_MAX_MTU - sizeof(uint32_t))
#define TAP_MSGS \
DIV_ROUND_UP(TAP_BUF_BYTES, ETH_ZLEN - 2 * ETH_ALEN + sizeof(uint32_t))
diff --git a/tap.c b/tap.c
index 6333015..aca8c75 100644
--- a/tap.c
+++ b/tap.c
@@ -57,6 +57,8 @@
static PACKET_POOL_NOINIT(pool_tap4, TAP_MSGS, pkt_buf);
static PACKET_POOL_NOINIT(pool_tap6, TAP_MSGS, pkt_buf);
+#define TAP_SEQS 128 /* Different L4 tuples in one batch */
+
/**
* tap_send() - Send frame, with qemu socket header if needed
* @c: Execution context
@@ -225,7 +227,7 @@ static struct tap4_l4_t {
uint32_t daddr;
struct pool_l4_t p;
-} tap4_l4[UIO_MAXIOV /* Arbitrary: TAP_MSGS in theory, so limit in users */];
+} tap4_l4[TAP_SEQS /* Arbitrary: TAP_MSGS in theory, so limit in users */];
/**
* struct l4_seq6_t - Message sequence for one protocol handler call, IPv6
@@ -247,7 +249,7 @@ static struct tap6_l4_t {
struct in6_addr daddr;
struct pool_l4_t p;
-} tap6_l4[UIO_MAXIOV /* Arbitrary: TAP_MSGS in theory, so limit in users */];
+} tap6_l4[TAP_SEQS /* Arbitrary: TAP_MSGS in theory, so limit in users */];
/**
* tap_packet_debug() - Print debug message for packet(s) from guest/tap
@@ -401,12 +403,12 @@ resume:
seq->daddr = iph->daddr; \
} while (0)
- if (seq && L4_MATCH(iph, uh, seq) && seq->p.count < UIO_MAXIOV)
+ if (seq && L4_MATCH(iph, uh, seq) && seq->p.count < TAP_SEQS)
goto append;
for (seq = tap4_l4 + seq_count - 1; seq >= tap4_l4; seq--) {
if (L4_MATCH(iph, uh, seq)) {
- if (seq->p.count >= UIO_MAXIOV)
+ if (seq->p.count >= TAP_SEQS)
seq = NULL;
break;
}
@@ -424,7 +426,7 @@ resume:
append:
packet_add((struct pool *)&seq->p, l4_len, l4h);
- if (seq_count == UIO_MAXIOV)
+ if (seq_count == TAP_SEQS)
break; /* Resume after flushing if i < count */
}
@@ -563,12 +565,12 @@ resume:
} while (0)
if (seq && L4_MATCH(ip6h, proto, uh, seq) &&
- seq->p.count < UIO_MAXIOV)
+ seq->p.count < TAP_SEQS)
goto append;
for (seq = tap6_l4 + seq_count - 1; seq >= tap6_l4; seq--) {
if (L4_MATCH(ip6h, proto, uh, seq)) {
- if (seq->p.count >= UIO_MAXIOV)
+ if (seq->p.count >= TAP_SEQS)
seq = NULL;
break;
}
@@ -586,7 +588,7 @@ resume:
append:
packet_add((struct pool *)&seq->p, l4_len, l4h);
- if (seq_count == UIO_MAXIOV)
+ if (seq_count == TAP_SEQS)
break; /* Resume after flushing if i < count */
}
@@ -924,9 +926,9 @@ void tap_sock_init(struct ctx *c)
pool_tap4_storage = PACKET_INIT(pool_tap4, TAP_MSGS, pkt_buf, sz);
pool_tap6_storage = PACKET_INIT(pool_tap6, TAP_MSGS, pkt_buf, sz);
- for (i = 0; i < UIO_MAXIOV; i++) {
- tap4_l4[i].p = PACKET_INIT(pool_l4, UIO_MAXIOV, pkt_buf, sz);
- tap6_l4[i].p = PACKET_INIT(pool_l4, UIO_MAXIOV, pkt_buf, sz);
+ for (i = 0; i < TAP_SEQS; i++) {
+ tap4_l4[i].p = PACKET_INIT(pool_l4, TAP_SEQS, pkt_buf, sz);
+ tap6_l4[i].p = PACKET_INIT(pool_l4, TAP_SEQS, pkt_buf, sz);
}
if (c->fd_tap != -1) {
diff --git a/tcp.c b/tcp.c
index fe46ede..2194067 100644
--- a/tcp.c
+++ b/tcp.c
@@ -70,9 +70,9 @@
*
* Data needs to linger on sockets as long as it's not acknowledged by the
* guest, and is read using MSG_PEEK into preallocated static buffers sized
- * to the maximum supported window, 64MiB ("discard" buffer, for already-sent
+ * to the maximum supported window, 16 MiB ("discard" buffer, for already-sent
* data) plus a number of maximum-MSS-sized buffers. This imposes a practical
- * limitation on window scaling, that is, the maximum factor is 1024. Larger
+ * limitation on window scaling, that is, the maximum factor is 256. Larger
* factors will be accepted, but resulting, larger values are never advertised
* to the other side, and not used while queueing data.
*
@@ -299,7 +299,7 @@
#include "conf.h"
#include "tcp_splice.h"
-#define TCP_FRAMES_MEM 256
+#define TCP_FRAMES_MEM 128
#define TCP_FRAMES \
(c->mode == MODE_PASST ? TCP_FRAMES_MEM : 1)
@@ -311,17 +311,48 @@
#define TCP_HASH_TABLE_SIZE (TCP_MAX_CONNS * 100 / \
TCP_HASH_TABLE_LOAD)
-#define MAX_WS 10
+#define MAX_WS 8
#define MAX_WINDOW (1 << (16 + (MAX_WS)))
/* MSS rounding: see SET_MSS() */
#define MSS_DEFAULT 536
-#define MSS4 ROUND_DOWN(USHRT_MAX - \
- sizeof(uint32_t) - sizeof(struct ethhdr) - \
- sizeof(struct iphdr) - sizeof(struct tcphdr), 4)
-#define MSS6 ROUND_DOWN(USHRT_MAX - \
- sizeof(uint32_t) - sizeof(struct ethhdr) - \
- sizeof(struct ipv6hdr) - sizeof(struct tcphdr), 4)
+
+struct tcp4_l2_head { /* For MSS4 macro: keep in sync with tcp4_l2_buf_t */
+ uint32_t psum;
+ uint32_t tsum;
+#ifdef __AVX2__
+ uint8_t pad[18];
+#else
+ uint8_t pad[2];
+#endif
+ uint32_t vnet_len;
+ struct ethhdr eh;
+ struct iphdr iph;
+ struct tcphdr th;
+#ifdef __AVX2__
+} __attribute__ ((packed, aligned(32)));
+#else
+} __attribute__ ((packed, aligned(__alignof__(unsigned int))));
+#endif
+
+struct tcp6_l2_head { /* For MSS6 macro: keep in sync with tcp6_l2_buf_t */
+#ifdef __AVX2__
+ uint8_t pad[14];
+#else
+ uint8_t pad[2];
+#endif
+ uint32_t vnet_len;
+ struct ethhdr eh;
+ struct ipv6hdr ip6h;
+ struct tcphdr th;
+#ifdef __AVX2__
+} __attribute__ ((packed, aligned(32)));
+#else
+} __attribute__ ((packed, aligned(__alignof__(unsigned int))));
+#endif
+
+#define MSS4 ROUND_DOWN(USHRT_MAX - sizeof(struct tcp4_l2_head), 4)
+#define MSS6 ROUND_DOWN(USHRT_MAX - sizeof(struct tcp6_l2_head), 4)
#define WINDOW_DEFAULT 14600 /* RFC 6928 */
#ifdef HAS_SND_WND
diff --git a/tcp_splice.c b/tcp_splice.c
index 714571c..3f2ef2e 100644
--- a/tcp_splice.c
+++ b/tcp_splice.c
@@ -102,10 +102,10 @@ struct tcp_splice_conn {
#define RCVLOWAT_ACT_B BIT(5)
#define CLOSING BIT(6)
- uint64_t a_read;
- uint64_t a_written;
- uint64_t b_read;
- uint64_t b_written;
+ uint32_t a_read;
+ uint32_t a_written;
+ uint32_t b_read;
+ uint32_t b_written;
};
#define CONN_V6(x) (x->flags & SOCK_V6)
@@ -553,7 +553,7 @@ void tcp_sock_handler_splice(struct ctx *c, union epoll_ref ref,
{
uint8_t lowat_set_flag, lowat_act_flag;
int from, to, *pipes, eof, never_read;
- uint64_t *seq_read, *seq_write;
+ uint32_t *seq_read, *seq_write;
struct tcp_splice_conn *conn;
if (ref.r.p.tcp.tcp.listen) {
diff --git a/udp.c b/udp.c
index 2cdbe6c..1c0fdc6 100644
--- a/udp.c
+++ b/udp.c
@@ -117,8 +117,8 @@
#include "pcap.h"
#define UDP_CONN_TIMEOUT 180 /* s, timeout for ephemeral or local bind */
-#define UDP_SPLICE_FRAMES 128
-#define UDP_TAP_FRAMES_MEM 128
+#define UDP_SPLICE_FRAMES 32
+#define UDP_TAP_FRAMES_MEM 32
#define UDP_TAP_FRAMES (c->mode == MODE_PASST ? UDP_TAP_FRAMES_MEM : 1)
/**
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 07:18:52 +0000