void quota_send_warning(struct kqid qid, dev_t dev,
const char warntype)
{
static atomic_t seq;
struct sk_buff *skb;
void *msg_head;
int ret;
int msg_size = 4 * nla_total_size(sizeof(u32)) +
2 * nla_total_size(sizeof(u64));
/* We have to allocate using GFP_NOFS as we are called from a
* filesystem performing write and thus further recursion into
* the fs to free some data could cause deadlocks. */
skb = genlmsg_new(msg_size, GFP_NOFS);
if (!skb) {
printk(KERN_ERR
"VFS: Not enough memory to send quota warning.\n");
return;
}
msg_head = genlmsg_put(skb, 0, atomic_add_return(1, &seq),
"a_genl_family, 0, QUOTA_NL_C_WARNING);
if (!msg_head) {
printk(KERN_ERR
"VFS: Cannot store netlink header in quota warning.\n");
goto err_out;
}
ret = nla_put_u32(skb, QUOTA_NL_A_QTYPE, qid.type);
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_EXCESS_ID,
from_kqid_munged(&init_user_ns, qid));
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_WARNING, warntype);
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MAJOR, MAJOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MINOR, MINOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID,
from_kuid_munged(&init_user_ns, current_uid()));
if (ret)
goto attr_err_out;
genlmsg_end(skb, msg_head);
genlmsg_multicast("a_genl_family, skb, 0, 0, GFP_NOFS);
return;
attr_err_out:
printk(KERN_ERR "VFS: Not enough space to compose quota message!\n");
err_out:
kfree_skb(skb);
}
void quota_send_warning(short type, unsigned int id, dev_t dev,
const char warntype)
{
static atomic_t seq;
struct sk_buff *skb;
void *msg_head;
int ret;
int msg_size = 4 * nla_total_size(sizeof(u32)) +
2 * nla_total_size(sizeof(u64));
/*
*/
skb = genlmsg_new(msg_size, GFP_NOFS);
if (!skb) {
printk(KERN_ERR
"VFS: Not enough memory to send quota warning.\n");
return;
}
msg_head = genlmsg_put(skb, 0, atomic_add_return(1, &seq),
"a_genl_family, 0, QUOTA_NL_C_WARNING);
if (!msg_head) {
printk(KERN_ERR
"VFS: Cannot store netlink header in quota warning.\n");
goto err_out;
}
ret = nla_put_u32(skb, QUOTA_NL_A_QTYPE, type);
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_EXCESS_ID, id);
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_WARNING, warntype);
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MAJOR, MAJOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MINOR, MINOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID, current_uid());
if (ret)
goto attr_err_out;
genlmsg_end(skb, msg_head);
genlmsg_multicast(skb, 0, quota_genl_family.id, GFP_NOFS);
return;
attr_err_out:
printk(KERN_ERR "VFS: Not enough space to compose quota message!\n");
err_out:
kfree_skb(skb);
}
static int l2tp_nl_session_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
struct l2tp_session *session)
{
void *hdr;
struct nlattr *nest;
struct l2tp_tunnel *tunnel = session->tunnel;
struct sock *sk = NULL;
sk = tunnel->sock;
hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags, L2TP_CMD_SESSION_GET);
if (IS_ERR(hdr))
return PTR_ERR(hdr);
nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id);
nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id);
nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id);
nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID, session->peer_session_id);
nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug);
nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype);
nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu);
if (session->mru)
nla_put_u16(skb, L2TP_ATTR_MRU, session->mru);
if (session->ifname && session->ifname[0])
nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname);
if (session->cookie_len)
nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, &session->cookie[0]);
if (session->peer_cookie_len)
nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, &session->peer_cookie[0]);
nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq);
nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq);
nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode);
#ifdef CONFIG_XFRM
if ((sk) && (sk->sk_policy[0] || sk->sk_policy[1]))
nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1);
#endif
if (session->reorder_timeout)
nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT, session->reorder_timeout);
nest = nla_nest_start(skb, L2TP_ATTR_STATS);
if (nest == NULL)
goto nla_put_failure;
nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, session->stats.tx_packets);
nla_put_u64(skb, L2TP_ATTR_TX_BYTES, session->stats.tx_bytes);
nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, session->stats.tx_errors);
nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, session->stats.rx_packets);
nla_put_u64(skb, L2TP_ATTR_RX_BYTES, session->stats.rx_bytes);
nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, session->stats.rx_seq_discards);
nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, session->stats.rx_oos_packets);
nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, session->stats.rx_errors);
nla_nest_end(skb, nest);
return genlmsg_end(skb, hdr);
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -1;
}
static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
struct l2tp_tunnel *tunnel)
{
void *hdr;
struct nlattr *nest;
struct sock *sk = NULL;
struct inet_sock *inet;
hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags,
L2TP_CMD_TUNNEL_GET);
if (IS_ERR(hdr))
return PTR_ERR(hdr);
nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version);
nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id);
nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id);
nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug);
nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap);
nest = nla_nest_start(skb, L2TP_ATTR_STATS);
if (nest == NULL)
goto nla_put_failure;
nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, tunnel->stats.tx_packets);
nla_put_u64(skb, L2TP_ATTR_TX_BYTES, tunnel->stats.tx_bytes);
nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, tunnel->stats.tx_errors);
nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, tunnel->stats.rx_packets);
nla_put_u64(skb, L2TP_ATTR_RX_BYTES, tunnel->stats.rx_bytes);
nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, tunnel->stats.rx_seq_discards);
nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, tunnel->stats.rx_oos_packets);
nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, tunnel->stats.rx_errors);
nla_nest_end(skb, nest);
sk = tunnel->sock;
if (!sk)
goto out;
inet = inet_sk(sk);
switch (tunnel->encap) {
case L2TP_ENCAPTYPE_UDP:
nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport));
nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport));
nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, (sk->sk_no_check != UDP_CSUM_NOXMIT));
/* NOBREAK */
case L2TP_ENCAPTYPE_IP:
nla_put_be32(skb, L2TP_ATTR_IP_SADDR, inet->inet_saddr);
nla_put_be32(skb, L2TP_ATTR_IP_DADDR, inet->inet_daddr);
break;
}
out:
return genlmsg_end(skb, hdr);
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -1;
}
static int
kfm_genl_fill_mempage(struct sk_buff *skb, struct kfm_mempage_u *umempage)
{
KFM_DBG(7, "ADDR:0x%016llx, PFN:0x%016llx, FLAGS:0x%016llx",
umempage->addr, umempage->pfn, umempage->flags);
if (nla_put_u64(skb, KFM_MEMPAGE_ATTR_ADDR, umempage->addr))
goto nla_put_failure;
if (nla_put_u64(skb, KFM_MEMPAGE_ATTR_PFN, umempage->pfn))
goto nla_put_failure;
if (nla_put_u64(skb, KFM_MEMPAGE_ATTR_FLAGS, umempage->flags))
goto nla_put_failure;
return 0;
nla_put_failure:
return -EMSGSIZE;
}
static int tbf_dump(struct Qdisc *sch, struct sk_buff *skb)
{
struct tbf_sched_data *q = qdisc_priv(sch);
struct nlattr *nest;
struct tc_tbf_qopt opt;
sch->qstats.backlog = q->qdisc->qstats.backlog;
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
goto nla_put_failure;
opt.limit = q->limit;
psched_ratecfg_getrate(&opt.rate, &q->rate);
if (q->peak_present)
psched_ratecfg_getrate(&opt.peakrate, &q->peak);
else
memset(&opt.peakrate, 0, sizeof(opt.peakrate));
opt.mtu = PSCHED_NS2TICKS(q->mtu);
opt.buffer = PSCHED_NS2TICKS(q->buffer);
if (nla_put(skb, TCA_TBF_PARMS, sizeof(opt), &opt))
goto nla_put_failure;
if (q->rate.rate_bytes_ps >= (1ULL << 32) &&
nla_put_u64(skb, TCA_TBF_RATE64, q->rate.rate_bytes_ps))
goto nla_put_failure;
if (q->peak_present &&
q->peak.rate_bytes_ps >= (1ULL << 32) &&
nla_put_u64(skb, TCA_TBF_PRATE64, q->peak.rate_bytes_ps))
goto nla_put_failure;
nla_nest_end(skb, nest);
return skb->len;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -1;
}
static int ip6_tun_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
if (nla_put_u64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id) ||
nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) ||
nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) ||
nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.tos) ||
nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.ttl) ||
nla_put_u16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags))
return -ENOMEM;
return 0;
}
static int ip_tun_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
if (nla_put_u64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id) ||
nla_put_be32(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) ||
nla_put_be32(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) ||
nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) ||
nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) ||
nla_put_u16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags))
return -ENOMEM;
return 0;
}
static int ip_tun_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
if (nla_put_u64(skb, IP_TUN_ID, tun_info->key.tun_id) ||
nla_put_be32(skb, IP_TUN_DST, tun_info->key.ipv4_dst) ||
nla_put_be32(skb, IP_TUN_SRC, tun_info->key.ipv4_src) ||
nla_put_u8(skb, IP_TUN_TOS, tun_info->key.ipv4_tos) ||
nla_put_u8(skb, IP_TUN_TTL, tun_info->key.ipv4_ttl) ||
nla_put_u16(skb, IP_TUN_SPORT, tun_info->key.tp_src) ||
nla_put_u16(skb, IP_TUN_DPORT, tun_info->key.tp_dst) ||
nla_put_u16(skb, IP_TUN_FLAGS, tun_info->key.tun_flags))
return -ENOMEM;
return 0;
}
static int emigration_failed_create_request(struct sk_buff *skb, void* params) {
int ret = 0;
struct emigration_failed_params* emigration_failed_params = params;
ret = nla_put_u32(skb, DIRECTOR_A_PID, emigration_failed_params->pid);
if (ret != 0)
goto failure;
ret = nla_put_string(skb, DIRECTOR_A_NAME, emigration_failed_params->name);
if (ret != 0)
goto failure;
ret = nla_put_u64(skb, DIRECTOR_A_JIFFIES, emigration_failed_params->jiffies);
if (ret != 0)
goto failure;
failure:
return ret;
}
static int nla_put_hwaddr(struct sk_buff *msg, int type, __le64 hwaddr)
{
return nla_put_u64(msg, type, swab64((__force u64)hwaddr));
}
static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
const struct dp_upcall_info *upcall_info)
{
struct ovs_header *upcall;
struct sk_buff *nskb = NULL;
struct sk_buff *user_skb; /* to be queued to userspace */
struct nlattr *nla;
unsigned int len;
int err;
if (vlan_tx_tag_present(skb)) {
nskb = skb_clone(skb, GFP_ATOMIC);
if (!nskb)
return -ENOMEM;
nskb = __vlan_put_tag(nskb, vlan_tx_tag_get(nskb));
if (!nskb)
return -ENOMEM;
nskb->vlan_tci = 0;
skb = nskb;
}
if (nla_attr_size(skb->len) > USHRT_MAX) {
err = -EFBIG;
goto out;
}
len = sizeof(struct ovs_header);
len += nla_total_size(skb->len);
len += nla_total_size(FLOW_BUFSIZE);
if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
len += nla_total_size(8);
user_skb = genlmsg_new(len, GFP_ATOMIC);
if (!user_skb) {
err = -ENOMEM;
goto out;
}
upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
0, upcall_info->cmd);
upcall->dp_ifindex = dp_ifindex;
nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
ovs_flow_to_nlattrs(upcall_info->key, user_skb);
nla_nest_end(user_skb, nla);
if (upcall_info->userdata)
nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA,
nla_get_u64(upcall_info->userdata));
nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
skb_copy_and_csum_dev(skb, nla_data(nla));
err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid);
out:
kfree_skb(nskb);
return err;
}
static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
struct l2tp_tunnel *tunnel)
{
void *hdr;
struct nlattr *nest;
struct sock *sk = NULL;
struct inet_sock *inet;
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6_pinfo *np = NULL;
#endif
struct l2tp_stats stats;
unsigned int start;
hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags,
L2TP_CMD_TUNNEL_GET);
if (IS_ERR(hdr))
return PTR_ERR(hdr);
if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) ||
nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) ||
nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) ||
nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) ||
nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap))
goto nla_put_failure;
nest = nla_nest_start(skb, L2TP_ATTR_STATS);
if (nest == NULL)
goto nla_put_failure;
do {
start = u64_stats_fetch_begin(&tunnel->stats.syncp);
stats.tx_packets = tunnel->stats.tx_packets;
stats.tx_bytes = tunnel->stats.tx_bytes;
stats.tx_errors = tunnel->stats.tx_errors;
stats.rx_packets = tunnel->stats.rx_packets;
stats.rx_bytes = tunnel->stats.rx_bytes;
stats.rx_errors = tunnel->stats.rx_errors;
stats.rx_seq_discards = tunnel->stats.rx_seq_discards;
stats.rx_oos_packets = tunnel->stats.rx_oos_packets;
} while (u64_stats_fetch_retry(&tunnel->stats.syncp, start));
if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, stats.tx_packets) ||
nla_put_u64(skb, L2TP_ATTR_TX_BYTES, stats.tx_bytes) ||
nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, stats.tx_errors) ||
nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, stats.rx_packets) ||
nla_put_u64(skb, L2TP_ATTR_RX_BYTES, stats.rx_bytes) ||
nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS,
stats.rx_seq_discards) ||
nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS,
stats.rx_oos_packets) ||
nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, stats.rx_errors))
goto nla_put_failure;
nla_nest_end(skb, nest);
sk = tunnel->sock;
if (!sk)
goto out;
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6)
np = inet6_sk(sk);
#endif
inet = inet_sk(sk);
switch (tunnel->encap) {
case L2TP_ENCAPTYPE_UDP:
if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) ||
nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)) ||
nla_put_u8(skb, L2TP_ATTR_UDP_CSUM,
(sk->sk_no_check != UDP_CSUM_NOXMIT)))
goto nla_put_failure;
/* NOBREAK */
case L2TP_ENCAPTYPE_IP:
#if IS_ENABLED(CONFIG_IPV6)
if (np) {
if (nla_put(skb, L2TP_ATTR_IP6_SADDR, sizeof(np->saddr),
&np->saddr) ||
nla_put(skb, L2TP_ATTR_IP6_DADDR, sizeof(np->daddr),
&np->daddr))
goto nla_put_failure;
} else
#endif
if (nla_put_be32(skb, L2TP_ATTR_IP_SADDR, inet->inet_saddr) ||
nla_put_be32(skb, L2TP_ATTR_IP_DADDR, inet->inet_daddr))
goto nla_put_failure;
break;
}
out:
return genlmsg_end(skb, hdr);
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -1;
}
static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, int flags,
struct l2tp_tunnel *tunnel, u8 cmd)
{
void *hdr;
struct nlattr *nest;
struct sock *sk = NULL;
struct inet_sock *inet;
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6_pinfo *np = NULL;
#endif
hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) ||
nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) ||
nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) ||
nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) ||
nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap))
goto nla_put_failure;
nest = nla_nest_start(skb, L2TP_ATTR_STATS);
if (nest == NULL)
goto nla_put_failure;
if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS,
atomic_long_read(&tunnel->stats.tx_packets)) ||
nla_put_u64(skb, L2TP_ATTR_TX_BYTES,
atomic_long_read(&tunnel->stats.tx_bytes)) ||
nla_put_u64(skb, L2TP_ATTR_TX_ERRORS,
atomic_long_read(&tunnel->stats.tx_errors)) ||
nla_put_u64(skb, L2TP_ATTR_RX_PACKETS,
atomic_long_read(&tunnel->stats.rx_packets)) ||
nla_put_u64(skb, L2TP_ATTR_RX_BYTES,
atomic_long_read(&tunnel->stats.rx_bytes)) ||
nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS,
atomic_long_read(&tunnel->stats.rx_seq_discards)) ||
nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS,
atomic_long_read(&tunnel->stats.rx_oos_packets)) ||
nla_put_u64(skb, L2TP_ATTR_RX_ERRORS,
atomic_long_read(&tunnel->stats.rx_errors)))
goto nla_put_failure;
nla_nest_end(skb, nest);
sk = tunnel->sock;
if (!sk)
goto out;
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6)
np = inet6_sk(sk);
#endif
inet = inet_sk(sk);
switch (tunnel->encap) {
case L2TP_ENCAPTYPE_UDP:
if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) ||
nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)) ||
nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx))
goto nla_put_failure;
/* NOBREAK */
case L2TP_ENCAPTYPE_IP:
#if IS_ENABLED(CONFIG_IPV6)
if (np) {
if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR,
&np->saddr) ||
nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR,
&sk->sk_v6_daddr))
goto nla_put_failure;
} else
#endif
if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR,
inet->inet_saddr) ||
nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR,
inet->inet_daddr))
goto nla_put_failure;
break;
}
out:
genlmsg_end(skb, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -1;
}