diff options
Diffstat (limited to 'net/packet/diag.c')
| -rw-r--r-- | net/packet/diag.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/net/packet/diag.c b/net/packet/diag.c index 3dda4ecb9a4..e3975e4d458 100644 --- a/net/packet/diag.c +++ b/net/packet/diag.c @@ -67,12 +67,54 @@ static int pdiag_put_mclist(const struct packet_sock *po, struct sk_buff *nlskb) return 0; } +static int pdiag_put_ring(struct packet_ring_buffer *ring, int ver, int nl_type, + struct sk_buff *nlskb) +{ + struct packet_diag_ring pdr; + + if (!ring->pg_vec || ((ver > TPACKET_V2) && + (nl_type == PACKET_DIAG_TX_RING))) + return 0; + + pdr.pdr_block_size = ring->pg_vec_pages << PAGE_SHIFT; + pdr.pdr_block_nr = ring->pg_vec_len; + pdr.pdr_frame_size = ring->frame_size; + pdr.pdr_frame_nr = ring->frame_max + 1; + + if (ver > TPACKET_V2) { + pdr.pdr_retire_tmo = ring->prb_bdqc.retire_blk_tov; + pdr.pdr_sizeof_priv = ring->prb_bdqc.blk_sizeof_priv; + pdr.pdr_features = ring->prb_bdqc.feature_req_word; + } else { + pdr.pdr_retire_tmo = 0; + pdr.pdr_sizeof_priv = 0; + pdr.pdr_features = 0; + } + + return nla_put(nlskb, nl_type, sizeof(pdr), &pdr); +} + +static int pdiag_put_rings_cfg(struct packet_sock *po, struct sk_buff *skb) +{ + int ret; + + mutex_lock(&po->pg_vec_lock); + ret = pdiag_put_ring(&po->rx_ring, po->tp_version, + PACKET_DIAG_RX_RING, skb); + if (!ret) + ret = pdiag_put_ring(&po->tx_ring, po->tp_version, + PACKET_DIAG_TX_RING, skb); + mutex_unlock(&po->pg_vec_lock); + + return ret; +} + static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct packet_diag_req *req, u32 pid, u32 seq, u32 flags, int sk_ino) { struct nlmsghdr *nlh; struct packet_diag_msg *rp; - const struct packet_sock *po = pkt_sk(sk); + struct packet_sock *po = pkt_sk(sk); nlh = nlmsg_put(skb, pid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rp), flags); if (!nlh) @@ -93,6 +135,10 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct packet_diag pdiag_put_mclist(po, skb)) goto out_nlmsg_trim; + if ((req->pdiag_show & PACKET_SHOW_RING_CFG) && + pdiag_put_rings_cfg(po, skb)) + goto out_nlmsg_trim; + return nlmsg_end(skb, nlh); out_nlmsg_trim: |