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Diffstat (limited to 'ring_tx.c')
-rw-r--r--ring_tx.c43
1 files changed, 8 insertions, 35 deletions
diff --git a/ring_tx.c b/ring_tx.c
index f4f06a1..18216ac 100644
--- a/ring_tx.c
+++ b/ring_tx.c
@@ -53,25 +53,28 @@ void setup_tx_ring_layout(int sock, struct ring *ring, unsigned int size,
ring->layout.tp_block_size = (jumbo_support ?
getpagesize() << 4 :
getpagesize() << 2);
+
ring->layout.tp_frame_size = (jumbo_support ?
TPACKET_ALIGNMENT << 12 :
TPACKET_ALIGNMENT << 7);
+
ring->layout.tp_block_nr = size / ring->layout.tp_block_size;
ring->layout.tp_frame_nr = ring->layout.tp_block_size /
ring->layout.tp_frame_size *
ring->layout.tp_block_nr;
+ set_sockopt_tpacket_v2(sock);
+
ring_verify_layout(ring);
}
void create_tx_ring(int sock, struct ring *ring, int verbose)
{
int ret;
-
- set_sockopt_tpacket_v2(sock);
retry:
ret = setsockopt(sock, SOL_PACKET, PACKET_TX_RING, &ring->layout,
sizeof(ring->layout));
+
if (errno == ENOMEM && ring->layout.tp_block_nr > 1) {
ring->layout.tp_block_nr >>= 1;
ring->layout.tp_frame_nr = ring->layout.tp_block_size /
@@ -94,45 +97,15 @@ retry:
void mmap_tx_ring(int sock, struct ring *ring)
{
- ring->mm_space = mmap(0, ring->mm_len, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_LOCKED | MAP_POPULATE, sock, 0);
- if (ring->mm_space == MAP_FAILED) {
- destroy_tx_ring(sock, ring);
- panic("Cannot mmap TX_RING!\n");
- }
+ mmap_ring_generic(sock, ring);
}
void alloc_tx_ring_frames(struct ring *ring)
{
- int i;
- size_t len = ring->layout.tp_frame_nr * sizeof(*ring->frames);
-
- ring->frames = xmalloc_aligned(len, CO_CACHE_LINE_SIZE);
- fmemset(ring->frames, 0, len);
-
- for (i = 0; i < ring->layout.tp_frame_nr; ++i) {
- ring->frames[i].iov_len = ring->layout.tp_frame_size;
- ring->frames[i].iov_base = ring->mm_space +
- (i * ring->layout.tp_frame_size);
- }
+ alloc_ring_frames_generic(ring);
}
void bind_tx_ring(int sock, struct ring *ring, int ifindex)
{
- int ret;
-
- fmemset(&ring->s_ll, 0, sizeof(ring->s_ll));
-
- ring->s_ll.sll_family = AF_PACKET;
- ring->s_ll.sll_protocol = htons(ETH_P_ALL);
- ring->s_ll.sll_ifindex = ifindex;
- ring->s_ll.sll_hatype = 0;
- ring->s_ll.sll_halen = 0;
- ring->s_ll.sll_pkttype = 0;
-
- ret = bind(sock, (struct sockaddr *) &ring->s_ll, sizeof(ring->s_ll));
- if (ret < 0) {
- destroy_tx_ring(sock, ring);
- panic("Cannot bind TX_RING!\n");
- }
+ bind_ring_generic(sock, ring, ifindex);
}