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Diffstat (limited to 'net/tipc/socket.c')
-rw-r--r--net/tipc/socket.c419
1 files changed, 312 insertions, 107 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 51bddc236a15..4731cad99d1c 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -121,6 +121,14 @@ static const struct proto_ops msg_ops;
static struct proto tipc_proto;
static struct proto tipc_proto_kern;
+static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
+ [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC },
+ [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 },
+ [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 },
+ [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED },
+ [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG }
+};
+
/*
* Revised TIPC socket locking policy:
*
@@ -236,12 +244,12 @@ static void tsk_advance_rx_queue(struct sock *sk)
*/
static void tsk_rej_rx_queue(struct sock *sk)
{
- struct sk_buff *buf;
+ struct sk_buff *skb;
u32 dnode;
- while ((buf = __skb_dequeue(&sk->sk_receive_queue))) {
- if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT))
- tipc_link_xmit(buf, dnode, 0);
+ while ((skb = __skb_dequeue(&sk->sk_receive_queue))) {
+ if (tipc_msg_reverse(skb, &dnode, TIPC_ERR_NO_PORT))
+ tipc_link_xmit_skb(skb, dnode, 0);
}
}
@@ -454,7 +462,7 @@ static int tipc_release(struct socket *sock)
{
struct sock *sk = sock->sk;
struct tipc_sock *tsk;
- struct sk_buff *buf;
+ struct sk_buff *skb;
u32 dnode;
/*
@@ -473,11 +481,11 @@ static int tipc_release(struct socket *sock)
*/
dnode = tsk_peer_node(tsk);
while (sock->state != SS_DISCONNECTING) {
- buf = __skb_dequeue(&sk->sk_receive_queue);
- if (buf == NULL)
+ skb = __skb_dequeue(&sk->sk_receive_queue);
+ if (skb == NULL)
break;
- if (TIPC_SKB_CB(buf)->handle != NULL)
- kfree_skb(buf);
+ if (TIPC_SKB_CB(skb)->handle != NULL)
+ kfree_skb(skb);
else {
if ((sock->state == SS_CONNECTING) ||
(sock->state == SS_CONNECTED)) {
@@ -485,8 +493,8 @@ static int tipc_release(struct socket *sock)
tsk->connected = 0;
tipc_node_remove_conn(dnode, tsk->ref);
}
- if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT))
- tipc_link_xmit(buf, dnode, 0);
+ if (tipc_msg_reverse(skb, &dnode, TIPC_ERR_NO_PORT))
+ tipc_link_xmit_skb(skb, dnode, 0);
}
}
@@ -494,12 +502,12 @@ static int tipc_release(struct socket *sock)
tipc_sk_ref_discard(tsk->ref);
k_cancel_timer(&tsk->timer);
if (tsk->connected) {
- buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
+ skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
SHORT_H_SIZE, 0, dnode, tipc_own_addr,
tsk_peer_port(tsk),
tsk->ref, TIPC_ERR_NO_PORT);
- if (buf)
- tipc_link_xmit(buf, dnode, tsk->ref);
+ if (skb)
+ tipc_link_xmit_skb(skb, dnode, tsk->ref);
tipc_node_remove_conn(dnode, tsk->ref);
}
k_term_timer(&tsk->timer);
@@ -692,7 +700,7 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
* tipc_sendmcast - send multicast message
* @sock: socket structure
* @seq: destination address
- * @iov: message data to send
+ * @msg: message to send
* @dsz: total length of message data
* @timeo: timeout to wait for wakeup
*
@@ -700,11 +708,11 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
* Returns the number of bytes sent on success, or errno
*/
static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
- struct iovec *iov, size_t dsz, long timeo)
+ struct msghdr *msg, size_t dsz, long timeo)
{
struct sock *sk = sock->sk;
struct tipc_msg *mhdr = &tipc_sk(sk)->phdr;
- struct sk_buff *buf;
+ struct sk_buff_head head;
uint mtu;
int rc;
@@ -719,12 +727,13 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
new_mtu:
mtu = tipc_bclink_get_mtu();
- rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf);
+ __skb_queue_head_init(&head);
+ rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &head);
if (unlikely(rc < 0))
return rc;
do {
- rc = tipc_bclink_xmit(buf);
+ rc = tipc_bclink_xmit(&head);
if (likely(rc >= 0)) {
rc = dsz;
break;
@@ -736,7 +745,7 @@ new_mtu:
tipc_sk(sk)->link_cong = 1;
rc = tipc_wait_for_sndmsg(sock, &timeo);
if (rc)
- kfree_skb_list(buf);
+ __skb_queue_purge(&head);
} while (!rc);
return rc;
}
@@ -818,39 +827,6 @@ exit:
return TIPC_OK;
}
-/**
- * dest_name_check - verify user is permitted to send to specified port name
- * @dest: destination address
- * @m: descriptor for message to be sent
- *
- * Prevents restricted configuration commands from being issued by
- * unauthorized users.
- *
- * Returns 0 if permission is granted, otherwise errno
- */
-static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m)
-{
- struct tipc_cfg_msg_hdr hdr;
-
- if (unlikely(dest->addrtype == TIPC_ADDR_ID))
- return 0;
- if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES))
- return 0;
- if (likely(dest->addr.name.name.type == TIPC_TOP_SRV))
- return 0;
- if (likely(dest->addr.name.name.type != TIPC_CFG_SRV))
- return -EACCES;
-
- if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr)))
- return -EMSGSIZE;
- if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr)))
- return -EFAULT;
- if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN)))
- return -EACCES;
-
- return 0;
-}
-
static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p)
{
struct sock *sk = sock->sk;
@@ -897,13 +873,13 @@ static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock,
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_msg *mhdr = &tsk->phdr;
- struct iovec *iov = m->msg_iov;
u32 dnode, dport;
- struct sk_buff *buf;
+ struct sk_buff_head head;
+ struct sk_buff *skb;
struct tipc_name_seq *seq = &dest->addr.nameseq;
u32 mtu;
long timeo;
- int rc = -EINVAL;
+ int rc;
if (unlikely(!dest))
return -EDESTADDRREQ;
@@ -936,14 +912,11 @@ static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock,
tsk->conn_instance = dest->addr.name.name.instance;
}
}
- rc = dest_name_check(dest, m);
- if (rc)
- goto exit;
timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
if (dest->addrtype == TIPC_ADDR_MCAST) {
- rc = tipc_sendmcast(sock, seq, iov, dsz, timeo);
+ rc = tipc_sendmcast(sock, seq, m, dsz, timeo);
goto exit;
} else if (dest->addrtype == TIPC_ADDR_NAME) {
u32 type = dest->addr.name.name.type;
@@ -974,13 +947,15 @@ static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock,
new_mtu:
mtu = tipc_node_get_mtu(dnode, tsk->ref);
- rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf);
+ __skb_queue_head_init(&head);
+ rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &head);
if (rc < 0)
goto exit;
do {
- TIPC_SKB_CB(buf)->wakeup_pending = tsk->link_cong;
- rc = tipc_link_xmit(buf, dnode, tsk->ref);
+ skb = skb_peek(&head);
+ TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong;
+ rc = tipc_link_xmit(&head, dnode, tsk->ref);
if (likely(rc >= 0)) {
if (sock->state != SS_READY)
sock->state = SS_CONNECTING;
@@ -994,7 +969,7 @@ new_mtu:
tsk->link_cong = 1;
rc = tipc_wait_for_sndmsg(sock, &timeo);
if (rc)
- kfree_skb_list(buf);
+ __skb_queue_purge(&head);
} while (!rc);
exit:
if (iocb)
@@ -1051,7 +1026,7 @@ static int tipc_send_stream(struct kiocb *iocb, struct socket *sock,
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_msg *mhdr = &tsk->phdr;
- struct sk_buff *buf;
+ struct sk_buff_head head;
DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
u32 ref = tsk->ref;
int rc = -EINVAL;
@@ -1086,12 +1061,13 @@ static int tipc_send_stream(struct kiocb *iocb, struct socket *sock,
next:
mtu = tsk->max_pkt;
send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE);
- rc = tipc_msg_build(mhdr, m->msg_iov, sent, send, mtu, &buf);
+ __skb_queue_head_init(&head);
+ rc = tipc_msg_build(mhdr, m, sent, send, mtu, &head);
if (unlikely(rc < 0))
goto exit;
do {
if (likely(!tsk_conn_cong(tsk))) {
- rc = tipc_link_xmit(buf, dnode, ref);
+ rc = tipc_link_xmit(&head, dnode, ref);
if (likely(!rc)) {
tsk->sent_unacked++;
sent += send;
@@ -1109,7 +1085,7 @@ next:
}
rc = tipc_wait_for_sndpkt(sock, &timeo);
if (rc)
- kfree_skb_list(buf);
+ __skb_queue_purge(&head);
} while (!rc);
exit:
if (iocb)
@@ -1254,20 +1230,20 @@ static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack)
{
- struct sk_buff *buf = NULL;
+ struct sk_buff *skb = NULL;
struct tipc_msg *msg;
u32 peer_port = tsk_peer_port(tsk);
u32 dnode = tsk_peer_node(tsk);
if (!tsk->connected)
return;
- buf = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode,
+ skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode,
tipc_own_addr, peer_port, tsk->ref, TIPC_OK);
- if (!buf)
+ if (!skb)
return;
- msg = buf_msg(buf);
+ msg = buf_msg(skb);
msg_set_msgcnt(msg, ack);
- tipc_link_xmit(buf, dnode, msg_link_selector(msg));
+ tipc_link_xmit_skb(skb, dnode, msg_link_selector(msg));
}
static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
@@ -1372,8 +1348,7 @@ restart:
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
- res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
- m->msg_iov, sz);
+ res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz);
if (res)
goto exit;
res = sz;
@@ -1473,8 +1448,8 @@ restart:
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
- res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
- m->msg_iov, sz_to_copy);
+ res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset,
+ m, sz_to_copy);
if (res)
goto exit;
@@ -1556,7 +1531,7 @@ static void tipc_data_ready(struct sock *sk)
* @tsk: TIPC socket
* @msg: message
*
- * Returns 0 (TIPC_OK) if everyting ok, -TIPC_ERR_NO_PORT otherwise
+ * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise
*/
static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf)
{
@@ -1723,20 +1698,20 @@ static int filter_rcv(struct sock *sk, struct sk_buff *buf)
/**
* tipc_backlog_rcv - handle incoming message from backlog queue
* @sk: socket
- * @buf: message
+ * @skb: message
*
* Caller must hold socket lock, but not port lock.
*
* Returns 0
*/
-static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf)
+static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb)
{
int rc;
u32 onode;
struct tipc_sock *tsk = tipc_sk(sk);
- uint truesize = buf->truesize;
+ uint truesize = skb->truesize;
- rc = filter_rcv(sk, buf);
+ rc = filter_rcv(sk, skb);
if (likely(!rc)) {
if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT)
@@ -1744,25 +1719,25 @@ static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf)
return 0;
}
- if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc))
+ if ((rc < 0) && !tipc_msg_reverse(skb, &onode, -rc))
return 0;
- tipc_link_xmit(buf, onode, 0);
+ tipc_link_xmit_skb(skb, onode, 0);
return 0;
}
/**
* tipc_sk_rcv - handle incoming message
- * @buf: buffer containing arriving message
+ * @skb: buffer containing arriving message
* Consumes buffer
* Returns 0 if success, or errno: -EHOSTUNREACH
*/
-int tipc_sk_rcv(struct sk_buff *buf)
+int tipc_sk_rcv(struct sk_buff *skb)
{
struct tipc_sock *tsk;
struct sock *sk;
- u32 dport = msg_destport(buf_msg(buf));
+ u32 dport = msg_destport(buf_msg(skb));
int rc = TIPC_OK;
uint limit;
u32 dnode;
@@ -1770,7 +1745,7 @@ int tipc_sk_rcv(struct sk_buff *buf)
/* Validate destination and message */
tsk = tipc_sk_get(dport);
if (unlikely(!tsk)) {
- rc = tipc_msg_eval(buf, &dnode);
+ rc = tipc_msg_eval(skb, &dnode);
goto exit;
}
sk = &tsk->sk;
@@ -1779,12 +1754,12 @@ int tipc_sk_rcv(struct sk_buff *buf)
spin_lock_bh(&sk->sk_lock.slock);
if (!sock_owned_by_user(sk)) {
- rc = filter_rcv(sk, buf);
+ rc = filter_rcv(sk, skb);
} else {
if (sk->sk_backlog.len == 0)
atomic_set(&tsk->dupl_rcvcnt, 0);
- limit = rcvbuf_limit(sk, buf) + atomic_read(&tsk->dupl_rcvcnt);
- if (sk_add_backlog(sk, buf, limit))
+ limit = rcvbuf_limit(sk, skb) + atomic_read(&tsk->dupl_rcvcnt);
+ if (sk_add_backlog(sk, skb, limit))
rc = -TIPC_ERR_OVERLOAD;
}
spin_unlock_bh(&sk->sk_lock.slock);
@@ -1792,10 +1767,10 @@ int tipc_sk_rcv(struct sk_buff *buf)
if (likely(!rc))
return 0;
exit:
- if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc))
+ if ((rc < 0) && !tipc_msg_reverse(skb, &dnode, -rc))
return -EHOSTUNREACH;
- tipc_link_xmit(buf, dnode, 0);
+ tipc_link_xmit_skb(skb, dnode, 0);
return (rc < 0) ? -EHOSTUNREACH : 0;
}
@@ -2053,7 +2028,7 @@ static int tipc_shutdown(struct socket *sock, int how)
{
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
- struct sk_buff *buf;
+ struct sk_buff *skb;
u32 dnode;
int res;
@@ -2068,23 +2043,23 @@ static int tipc_shutdown(struct socket *sock, int how)
restart:
/* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
- buf = __skb_dequeue(&sk->sk_receive_queue);
- if (buf) {
- if (TIPC_SKB_CB(buf)->handle != NULL) {
- kfree_skb(buf);
+ skb = __skb_dequeue(&sk->sk_receive_queue);
+ if (skb) {
+ if (TIPC_SKB_CB(skb)->handle != NULL) {
+ kfree_skb(skb);
goto restart;
}
- if (tipc_msg_reverse(buf, &dnode, TIPC_CONN_SHUTDOWN))
- tipc_link_xmit(buf, dnode, tsk->ref);
+ if (tipc_msg_reverse(skb, &dnode, TIPC_CONN_SHUTDOWN))
+ tipc_link_xmit_skb(skb, dnode, tsk->ref);
tipc_node_remove_conn(dnode, tsk->ref);
} else {
dnode = tsk_peer_node(tsk);
- buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
+ skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
TIPC_CONN_MSG, SHORT_H_SIZE,
0, dnode, tipc_own_addr,
tsk_peer_port(tsk),
tsk->ref, TIPC_CONN_SHUTDOWN);
- tipc_link_xmit(buf, dnode, tsk->ref);
+ tipc_link_xmit_skb(skb, dnode, tsk->ref);
}
tsk->connected = 0;
sock->state = SS_DISCONNECTING;
@@ -2113,7 +2088,7 @@ static void tipc_sk_timeout(unsigned long ref)
{
struct tipc_sock *tsk;
struct sock *sk;
- struct sk_buff *buf = NULL;
+ struct sk_buff *skb = NULL;
u32 peer_port, peer_node;
tsk = tipc_sk_get(ref);
@@ -2131,20 +2106,20 @@ static void tipc_sk_timeout(unsigned long ref)
if (tsk->probing_state == TIPC_CONN_PROBING) {
/* Previous probe not answered -> self abort */
- buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
+ skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
SHORT_H_SIZE, 0, tipc_own_addr,
peer_node, ref, peer_port,
TIPC_ERR_NO_PORT);
} else {
- buf = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE,
+ skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE,
0, peer_node, tipc_own_addr,
peer_port, ref, TIPC_OK);
tsk->probing_state = TIPC_CONN_PROBING;
k_start_timer(&tsk->timer, tsk->probing_interval);
}
bh_unlock_sock(sk);
- if (buf)
- tipc_link_xmit(buf, peer_node, ref);
+ if (skb)
+ tipc_link_xmit_skb(skb, peer_node, ref);
exit:
tipc_sk_put(tsk);
}
@@ -2802,3 +2777,233 @@ void tipc_socket_stop(void)
sock_unregister(tipc_family_ops.family);
proto_unregister(&tipc_proto);
}
+
+/* Caller should hold socket lock for the passed tipc socket. */
+static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk)
+{
+ u32 peer_node;
+ u32 peer_port;
+ struct nlattr *nest;
+
+ peer_node = tsk_peer_node(tsk);
+ peer_port = tsk_peer_port(tsk);
+
+ nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON);
+
+ if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node))
+ goto msg_full;
+ if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port))
+ goto msg_full;
+
+ if (tsk->conn_type != 0) {
+ if (nla_put_flag(skb, TIPC_NLA_CON_FLAG))
+ goto msg_full;
+ if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type))
+ goto msg_full;
+ if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance))
+ goto msg_full;
+ }
+ nla_nest_end(skb, nest);
+
+ return 0;
+
+msg_full:
+ nla_nest_cancel(skb, nest);
+
+ return -EMSGSIZE;
+}
+
+/* Caller should hold socket lock for the passed tipc socket. */
+static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb,
+ struct tipc_sock *tsk)
+{
+ int err;
+ void *hdr;
+ struct nlattr *attrs;
+
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);
+ if (!hdr)
+ goto msg_cancel;
+
+ attrs = nla_nest_start(skb, TIPC_NLA_SOCK);
+ if (!attrs)
+ goto genlmsg_cancel;
+ if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->ref))
+ goto attr_msg_cancel;
+ if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr))
+ goto attr_msg_cancel;
+
+ if (tsk->connected) {
+ err = __tipc_nl_add_sk_con(skb, tsk);
+ if (err)
+ goto attr_msg_cancel;
+ } else if (!list_empty(&tsk->publications)) {
+ if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL))
+ goto attr_msg_cancel;
+ }
+ nla_nest_end(skb, attrs);
+ genlmsg_end(skb, hdr);
+
+ return 0;
+
+attr_msg_cancel:
+ nla_nest_cancel(skb, attrs);
+genlmsg_cancel:
+ genlmsg_cancel(skb, hdr);
+msg_cancel:
+ return -EMSGSIZE;
+}
+
+int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int err;
+ struct tipc_sock *tsk;
+ u32 prev_ref = cb->args[0];
+ u32 ref = prev_ref;
+
+ tsk = tipc_sk_get_next(&ref);
+ for (; tsk; tsk = tipc_sk_get_next(&ref)) {
+ lock_sock(&tsk->sk);
+ err = __tipc_nl_add_sk(skb, cb, tsk);
+ release_sock(&tsk->sk);
+ tipc_sk_put(tsk);
+ if (err)
+ break;
+
+ prev_ref = ref;
+ }
+
+ cb->args[0] = prev_ref;
+
+ return skb->len;
+}
+
+/* Caller should hold socket lock for the passed tipc socket. */
+static int __tipc_nl_add_sk_publ(struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct publication *publ)
+{
+ void *hdr;
+ struct nlattr *attrs;
+
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_PUBL_GET);
+ if (!hdr)
+ goto msg_cancel;
+
+ attrs = nla_nest_start(skb, TIPC_NLA_PUBL);
+ if (!attrs)
+ goto genlmsg_cancel;
+
+ if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key))
+ goto attr_msg_cancel;
+ if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type))
+ goto attr_msg_cancel;
+ if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower))
+ goto attr_msg_cancel;
+ if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper))
+ goto attr_msg_cancel;
+
+ nla_nest_end(skb, attrs);
+ genlmsg_end(skb, hdr);
+
+ return 0;
+
+attr_msg_cancel:
+ nla_nest_cancel(skb, attrs);
+genlmsg_cancel:
+ genlmsg_cancel(skb, hdr);
+msg_cancel:
+ return -EMSGSIZE;
+}
+
+/* Caller should hold socket lock for the passed tipc socket. */
+static int __tipc_nl_list_sk_publ(struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct tipc_sock *tsk, u32 *last_publ)
+{
+ int err;
+ struct publication *p;
+
+ if (*last_publ) {
+ list_for_each_entry(p, &tsk->publications, pport_list) {
+ if (p->key == *last_publ)
+ break;
+ }
+ if (p->key != *last_publ) {
+ /* We never set seq or call nl_dump_check_consistent()
+ * this means that setting prev_seq here will cause the
+ * consistence check to fail in the netlink callback
+ * handler. Resulting in the last NLMSG_DONE message
+ * having the NLM_F_DUMP_INTR flag set.
+ */
+ cb->prev_seq = 1;
+ *last_publ = 0;
+ return -EPIPE;
+ }
+ } else {
+ p = list_first_entry(&tsk->publications, struct publication,
+ pport_list);
+ }
+
+ list_for_each_entry_from(p, &tsk->publications, pport_list) {
+ err = __tipc_nl_add_sk_publ(skb, cb, p);
+ if (err) {
+ *last_publ = p->key;
+ return err;
+ }
+ }
+ *last_publ = 0;
+
+ return 0;
+}
+
+int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int err;
+ u32 tsk_ref = cb->args[0];
+ u32 last_publ = cb->args[1];
+ u32 done = cb->args[2];
+ struct tipc_sock *tsk;
+
+ if (!tsk_ref) {
+ struct nlattr **attrs;
+ struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
+
+ err = tipc_nlmsg_parse(cb->nlh, &attrs);
+ if (err)
+ return err;
+
+ err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX,
+ attrs[TIPC_NLA_SOCK],
+ tipc_nl_sock_policy);
+ if (err)
+ return err;
+
+ if (!sock[TIPC_NLA_SOCK_REF])
+ return -EINVAL;
+
+ tsk_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
+ }
+
+ if (done)
+ return 0;
+
+ tsk = tipc_sk_get(tsk_ref);
+ if (!tsk)
+ return -EINVAL;
+
+ lock_sock(&tsk->sk);
+ err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ);
+ if (!err)
+ done = 1;
+ release_sock(&tsk->sk);
+ tipc_sk_put(tsk);
+
+ cb->args[0] = tsk_ref;
+ cb->args[1] = last_publ;
+ cb->args[2] = done;
+
+ return skb->len;
+}