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-rw-r--r--net/tipc/link.c545
-rw-r--r--net/tipc/link.h2
-rw-r--r--net/tipc/msg.c282
-rw-r--r--net/tipc/msg.h32
-rw-r--r--net/tipc/net.c63
-rw-r--r--net/tipc/net.h2
-rw-r--r--net/tipc/node.c25
-rw-r--r--net/tipc/node.h17
-rw-r--r--net/tipc/node_subscr.c6
-rw-r--r--net/tipc/port.c328
-rw-r--r--net/tipc/port.h40
-rw-r--r--net/tipc/socket.c491
-rw-r--r--net/tipc/socket.h14
13 files changed, 912 insertions, 935 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index ad2c57f5868d..a235b245f682 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -82,15 +82,14 @@ static void tipc_link_proto_rcv(struct tipc_link *l_ptr, struct sk_buff *buf);
static int tipc_link_tunnel_rcv(struct tipc_node *n_ptr,
struct sk_buff **buf);
static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tolerance);
-static int tipc_link_iovec_long_xmit(struct tipc_port *sender,
- struct iovec const *msg_sect,
- unsigned int len, u32 destnode);
static void link_state_event(struct tipc_link *l_ptr, u32 event);
static void link_reset_statistics(struct tipc_link *l_ptr);
static void link_print(struct tipc_link *l_ptr, const char *str);
static int tipc_link_frag_xmit(struct tipc_link *l_ptr, struct sk_buff *buf);
static void tipc_link_sync_xmit(struct tipc_link *l);
static void tipc_link_sync_rcv(struct tipc_node *n, struct sk_buff *buf);
+static int tipc_link_input(struct tipc_link *l, struct sk_buff *buf);
+static int tipc_link_prepare_input(struct tipc_link *l, struct sk_buff **buf);
/*
* Simple link routines
@@ -335,13 +334,15 @@ void tipc_link_delete_list(unsigned int bearer_id, bool shutting_down)
static int link_schedule_port(struct tipc_link *l_ptr, u32 origport, u32 sz)
{
struct tipc_port *p_ptr;
+ struct tipc_sock *tsk;
spin_lock_bh(&tipc_port_list_lock);
p_ptr = tipc_port_lock(origport);
if (p_ptr) {
if (!list_empty(&p_ptr->wait_list))
goto exit;
- p_ptr->congested = 1;
+ tsk = tipc_port_to_sock(p_ptr);
+ tsk->link_cong = 1;
p_ptr->waiting_pkts = 1 + ((sz - 1) / l_ptr->max_pkt);
list_add_tail(&p_ptr->wait_list, &l_ptr->waiting_ports);
l_ptr->stats.link_congs++;
@@ -355,6 +356,7 @@ exit:
void tipc_link_wakeup_ports(struct tipc_link *l_ptr, int all)
{
struct tipc_port *p_ptr;
+ struct tipc_sock *tsk;
struct tipc_port *temp_p_ptr;
int win = l_ptr->queue_limit[0] - l_ptr->out_queue_size;
@@ -370,10 +372,11 @@ void tipc_link_wakeup_ports(struct tipc_link *l_ptr, int all)
wait_list) {
if (win <= 0)
break;
+ tsk = tipc_port_to_sock(p_ptr);
list_del_init(&p_ptr->wait_list);
spin_lock_bh(p_ptr->lock);
- p_ptr->congested = 0;
- tipc_port_wakeup(p_ptr);
+ tsk->link_cong = 0;
+ tipc_sock_wakeup(tsk);
win -= p_ptr->waiting_pkts;
spin_unlock_bh(p_ptr->lock);
}
@@ -850,6 +853,144 @@ int tipc_link_xmit(struct sk_buff *buf, u32 dest, u32 selector)
return res;
}
+/* tipc_link_cong: determine return value and how to treat the
+ * sent buffer during link congestion.
+ * - For plain, errorless user data messages we keep the buffer and
+ * return -ELINKONG.
+ * - For all other messages we discard the buffer and return -EHOSTUNREACH
+ * - For TIPC internal messages we also reset the link
+ */
+static int tipc_link_cong(struct tipc_link *link, struct sk_buff *buf)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ uint psz = msg_size(msg);
+ uint imp = tipc_msg_tot_importance(msg);
+ u32 oport = msg_tot_origport(msg);
+
+ if (likely(imp <= TIPC_CRITICAL_IMPORTANCE)) {
+ if (!msg_errcode(msg) && !msg_reroute_cnt(msg)) {
+ link_schedule_port(link, oport, psz);
+ return -ELINKCONG;
+ }
+ } else {
+ pr_warn("%s<%s>, send queue full", link_rst_msg, link->name);
+ tipc_link_reset(link);
+ }
+ kfree_skb_list(buf);
+ return -EHOSTUNREACH;
+}
+
+/**
+ * __tipc_link_xmit2(): same as tipc_link_xmit2, but destlink is known & locked
+ * @link: link to use
+ * @buf: chain of buffers containing message
+ * Consumes the buffer chain, except when returning -ELINKCONG
+ * Returns 0 if success, otherwise errno: -ELINKCONG, -EMSGSIZE (plain socket
+ * user data messages) or -EHOSTUNREACH (all other messages/senders)
+ * Only the socket functions tipc_send_stream() and tipc_send_packet() need
+ * to act on the return value, since they may need to do more send attempts.
+ */
+int __tipc_link_xmit2(struct tipc_link *link, struct sk_buff *buf)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ uint psz = msg_size(msg);
+ uint qsz = link->out_queue_size;
+ uint sndlim = link->queue_limit[0];
+ uint imp = tipc_msg_tot_importance(msg);
+ uint mtu = link->max_pkt;
+ uint ack = mod(link->next_in_no - 1);
+ uint seqno = link->next_out_no;
+ uint bc_last_in = link->owner->bclink.last_in;
+ struct tipc_media_addr *addr = &link->media_addr;
+ struct sk_buff *next = buf->next;
+
+ /* Match queue limits against msg importance: */
+ if (unlikely(qsz >= link->queue_limit[imp]))
+ return tipc_link_cong(link, buf);
+
+ /* Has valid packet limit been used ? */
+ if (unlikely(psz > mtu)) {
+ kfree_skb_list(buf);
+ return -EMSGSIZE;
+ }
+
+ /* Prepare each packet for sending, and add to outqueue: */
+ while (buf) {
+ next = buf->next;
+ msg = buf_msg(buf);
+ msg_set_word(msg, 2, ((ack << 16) | mod(seqno)));
+ msg_set_bcast_ack(msg, bc_last_in);
+
+ if (!link->first_out) {
+ link->first_out = buf;
+ } else if (qsz < sndlim) {
+ link->last_out->next = buf;
+ } else if (tipc_msg_bundle(link->last_out, buf, mtu)) {
+ link->stats.sent_bundled++;
+ buf = next;
+ next = buf->next;
+ continue;
+ } else if (tipc_msg_make_bundle(&buf, mtu, link->addr)) {
+ link->stats.sent_bundled++;
+ link->stats.sent_bundles++;
+ link->last_out->next = buf;
+ if (!link->next_out)
+ link->next_out = buf;
+ } else {
+ link->last_out->next = buf;
+ if (!link->next_out)
+ link->next_out = buf;
+ }
+
+ /* Send packet if possible: */
+ if (likely(++qsz <= sndlim)) {
+ tipc_bearer_send(link->bearer_id, buf, addr);
+ link->next_out = next;
+ link->unacked_window = 0;
+ }
+ seqno++;
+ link->last_out = buf;
+ buf = next;
+ }
+ link->next_out_no = seqno;
+ link->out_queue_size = qsz;
+ return 0;
+}
+
+/**
+ * tipc_link_xmit2() is the general link level function for message sending
+ * @buf: chain of buffers containing message
+ * @dsz: amount of user data to be sent
+ * @dnode: address of destination node
+ * @selector: a number used for deterministic link selection
+ * Consumes the buffer chain, except when returning -ELINKCONG
+ * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE
+ */
+int tipc_link_xmit2(struct sk_buff *buf, u32 dnode, u32 selector)
+{
+ struct tipc_link *link = NULL;
+ struct tipc_node *node;
+ int rc = -EHOSTUNREACH;
+
+ node = tipc_node_find(dnode);
+ if (node) {
+ tipc_node_lock(node);
+ link = node->active_links[selector & 1];
+ if (link)
+ rc = __tipc_link_xmit2(link, buf);
+ tipc_node_unlock(node);
+ }
+
+ if (link)
+ return rc;
+
+ if (likely(in_own_node(dnode)))
+ return tipc_sk_rcv(buf);
+
+ kfree_skb_list(buf);
+ return rc;
+}
+
/*
* tipc_link_sync_xmit - synchronize broadcast link endpoints.
*
@@ -933,252 +1074,6 @@ void tipc_link_names_xmit(struct list_head *message_list, u32 dest)
}
/*
- * tipc_link_xmit_fast: Entry for data messages where the
- * destination link is known and the header is complete,
- * inclusive total message length. Very time critical.
- * Link is locked. Returns user data length.
- */
-static int tipc_link_xmit_fast(struct tipc_link *l_ptr, struct sk_buff *buf,
- u32 *used_max_pkt)
-{
- struct tipc_msg *msg = buf_msg(buf);
- int res = msg_data_sz(msg);
-
- if (likely(!link_congested(l_ptr))) {
- if (likely(msg_size(msg) <= l_ptr->max_pkt)) {
- link_add_to_outqueue(l_ptr, buf, msg);
- tipc_bearer_send(l_ptr->bearer_id, buf,
- &l_ptr->media_addr);
- l_ptr->unacked_window = 0;
- return res;
- }
- else
- *used_max_pkt = l_ptr->max_pkt;
- }
- return __tipc_link_xmit(l_ptr, buf); /* All other cases */
-}
-
-/*
- * tipc_link_iovec_xmit_fast: Entry for messages where the
- * destination processor is known and the header is complete,
- * except for total message length.
- * Returns user data length or errno.
- */
-int tipc_link_iovec_xmit_fast(struct tipc_port *sender,
- struct iovec const *msg_sect,
- unsigned int len, u32 destaddr)
-{
- struct tipc_msg *hdr = &sender->phdr;
- struct tipc_link *l_ptr;
- struct sk_buff *buf;
- struct tipc_node *node;
- int res;
- u32 selector = msg_origport(hdr) & 1;
-
-again:
- /*
- * Try building message using port's max_pkt hint.
- * (Must not hold any locks while building message.)
- */
- res = tipc_msg_build(hdr, msg_sect, len, sender->max_pkt, &buf);
- /* Exit if build request was invalid */
- if (unlikely(res < 0))
- return res;
-
- node = tipc_node_find(destaddr);
- if (likely(node)) {
- tipc_node_lock(node);
- l_ptr = node->active_links[selector];
- if (likely(l_ptr)) {
- if (likely(buf)) {
- res = tipc_link_xmit_fast(l_ptr, buf,
- &sender->max_pkt);
-exit:
- tipc_node_unlock(node);
- return res;
- }
-
- /* Exit if link (or bearer) is congested */
- if (link_congested(l_ptr)) {
- res = link_schedule_port(l_ptr,
- sender->ref, res);
- goto exit;
- }
-
- /*
- * Message size exceeds max_pkt hint; update hint,
- * then re-try fast path or fragment the message
- */
- sender->max_pkt = l_ptr->max_pkt;
- tipc_node_unlock(node);
-
-
- if ((msg_hdr_sz(hdr) + res) <= sender->max_pkt)
- goto again;
-
- return tipc_link_iovec_long_xmit(sender, msg_sect,
- len, destaddr);
- }
- tipc_node_unlock(node);
- }
-
- /* Couldn't find a link to the destination node */
- kfree_skb(buf);
- tipc_port_iovec_reject(sender, hdr, msg_sect, len, TIPC_ERR_NO_NODE);
- return -ENETUNREACH;
-}
-
-/*
- * tipc_link_iovec_long_xmit(): Entry for long messages where the
- * destination node is known and the header is complete,
- * inclusive total message length.
- * Link and bearer congestion status have been checked to be ok,
- * and are ignored if they change.
- *
- * Note that fragments do not use the full link MTU so that they won't have
- * to undergo refragmentation if link changeover causes them to be sent
- * over another link with an additional tunnel header added as prefix.
- * (Refragmentation will still occur if the other link has a smaller MTU.)
- *
- * Returns user data length or errno.
- */
-static int tipc_link_iovec_long_xmit(struct tipc_port *sender,
- struct iovec const *msg_sect,
- unsigned int len, u32 destaddr)
-{
- struct tipc_link *l_ptr;
- struct tipc_node *node;
- struct tipc_msg *hdr = &sender->phdr;
- u32 dsz = len;
- u32 max_pkt, fragm_sz, rest;
- struct tipc_msg fragm_hdr;
- struct sk_buff *buf, *buf_chain, *prev;
- u32 fragm_crs, fragm_rest, hsz, sect_rest;
- const unchar __user *sect_crs;
- int curr_sect;
- u32 fragm_no;
- int res = 0;
-
-again:
- fragm_no = 1;
- max_pkt = sender->max_pkt - INT_H_SIZE;
- /* leave room for tunnel header in case of link changeover */
- fragm_sz = max_pkt - INT_H_SIZE;
- /* leave room for fragmentation header in each fragment */
- rest = dsz;
- fragm_crs = 0;
- fragm_rest = 0;
- sect_rest = 0;
- sect_crs = NULL;
- curr_sect = -1;
-
- /* Prepare reusable fragment header */
- tipc_msg_init(&fragm_hdr, MSG_FRAGMENTER, FIRST_FRAGMENT,
- INT_H_SIZE, msg_destnode(hdr));
- msg_set_size(&fragm_hdr, max_pkt);
- msg_set_fragm_no(&fragm_hdr, 1);
-
- /* Prepare header of first fragment */
- buf_chain = buf = tipc_buf_acquire(max_pkt);
- if (!buf)
- return -ENOMEM;
- buf->next = NULL;
- skb_copy_to_linear_data(buf, &fragm_hdr, INT_H_SIZE);
- hsz = msg_hdr_sz(hdr);
- skb_copy_to_linear_data_offset(buf, INT_H_SIZE, hdr, hsz);
-
- /* Chop up message */
- fragm_crs = INT_H_SIZE + hsz;
- fragm_rest = fragm_sz - hsz;
-
- do { /* For all sections */
- u32 sz;
-
- if (!sect_rest) {
- sect_rest = msg_sect[++curr_sect].iov_len;
- sect_crs = msg_sect[curr_sect].iov_base;
- }
-
- if (sect_rest < fragm_rest)
- sz = sect_rest;
- else
- sz = fragm_rest;
-
- if (copy_from_user(buf->data + fragm_crs, sect_crs, sz)) {
- res = -EFAULT;
-error:
- kfree_skb_list(buf_chain);
- return res;
- }
- sect_crs += sz;
- sect_rest -= sz;
- fragm_crs += sz;
- fragm_rest -= sz;
- rest -= sz;
-
- if (!fragm_rest && rest) {
-
- /* Initiate new fragment: */
- if (rest <= fragm_sz) {
- fragm_sz = rest;
- msg_set_type(&fragm_hdr, LAST_FRAGMENT);
- } else {
- msg_set_type(&fragm_hdr, FRAGMENT);
- }
- msg_set_size(&fragm_hdr, fragm_sz + INT_H_SIZE);
- msg_set_fragm_no(&fragm_hdr, ++fragm_no);
- prev = buf;
- buf = tipc_buf_acquire(fragm_sz + INT_H_SIZE);
- if (!buf) {
- res = -ENOMEM;
- goto error;
- }
-
- buf->next = NULL;
- prev->next = buf;
- skb_copy_to_linear_data(buf, &fragm_hdr, INT_H_SIZE);
- fragm_crs = INT_H_SIZE;
- fragm_rest = fragm_sz;
- }
- } while (rest > 0);
-
- /*
- * Now we have a buffer chain. Select a link and check
- * that packet size is still OK
- */
- node = tipc_node_find(destaddr);
- if (likely(node)) {
- tipc_node_lock(node);
- l_ptr = node->active_links[sender->ref & 1];
- if (!l_ptr) {
- tipc_node_unlock(node);
- goto reject;
- }
- if (l_ptr->max_pkt < max_pkt) {
- sender->max_pkt = l_ptr->max_pkt;
- tipc_node_unlock(node);
- kfree_skb_list(buf_chain);
- goto again;
- }
- } else {
-reject:
- kfree_skb_list(buf_chain);
- tipc_port_iovec_reject(sender, hdr, msg_sect, len,
- TIPC_ERR_NO_NODE);
- return -ENETUNREACH;
- }
-
- /* Append chain of fragments to send queue & send them */
- l_ptr->long_msg_seq_no++;
- link_add_chain_to_outqueue(l_ptr, buf_chain, l_ptr->long_msg_seq_no);
- l_ptr->stats.sent_fragments += fragm_no;
- l_ptr->stats.sent_fragmented++;
- tipc_link_push_queue(l_ptr);
- tipc_node_unlock(node);
- return dsz;
-}
-
-/*
* tipc_link_push_packet: Push one unsent packet to the media
*/
static u32 tipc_link_push_packet(struct tipc_link *l_ptr)
@@ -1238,7 +1133,7 @@ static u32 tipc_link_push_packet(struct tipc_link *l_ptr)
tipc_bearer_send(l_ptr->bearer_id, buf,
&l_ptr->media_addr);
if (msg_user(msg) == MSG_BUNDLER)
- msg_set_type(msg, CLOSED_MSG);
+ msg_set_type(msg, BUNDLE_CLOSED);
l_ptr->next_out = buf->next;
return 0;
}
@@ -1527,11 +1422,6 @@ void tipc_rcv(struct sk_buff *head, struct tipc_bearer *b_ptr)
if (unlikely(!list_empty(&l_ptr->waiting_ports)))
tipc_link_wakeup_ports(l_ptr, 0);
- if (unlikely(++l_ptr->unacked_window >= TIPC_MIN_LINK_WIN)) {
- l_ptr->stats.sent_acks++;
- tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0);
- }
-
/* Process the incoming packet */
if (unlikely(!link_working_working(l_ptr))) {
if (msg_user(msg) == LINK_PROTOCOL) {
@@ -1565,57 +1455,19 @@ void tipc_rcv(struct sk_buff *head, struct tipc_bearer *b_ptr)
if (unlikely(l_ptr->oldest_deferred_in))
head = link_insert_deferred_queue(l_ptr, head);
- /* Deliver packet/message to correct user: */
- if (unlikely(msg_user(msg) == CHANGEOVER_PROTOCOL)) {
- if (!tipc_link_tunnel_rcv(n_ptr, &buf)) {
- tipc_node_unlock(n_ptr);
- continue;
- }
- msg = buf_msg(buf);
- } else if (msg_user(msg) == MSG_FRAGMENTER) {
- l_ptr->stats.recv_fragments++;
- if (tipc_buf_append(&l_ptr->reasm_buf, &buf)) {
- l_ptr->stats.recv_fragmented++;
- msg = buf_msg(buf);
- } else {
- if (!l_ptr->reasm_buf)
- tipc_link_reset(l_ptr);
- tipc_node_unlock(n_ptr);
- continue;
- }
+ if (unlikely(++l_ptr->unacked_window >= TIPC_MIN_LINK_WIN)) {
+ l_ptr->stats.sent_acks++;
+ tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0);
}
- switch (msg_user(msg)) {
- case TIPC_LOW_IMPORTANCE:
- case TIPC_MEDIUM_IMPORTANCE:
- case TIPC_HIGH_IMPORTANCE:
- case TIPC_CRITICAL_IMPORTANCE:
- tipc_node_unlock(n_ptr);
- tipc_sk_rcv(buf);
- continue;
- case MSG_BUNDLER:
- l_ptr->stats.recv_bundles++;
- l_ptr->stats.recv_bundled += msg_msgcnt(msg);
- tipc_node_unlock(n_ptr);
- tipc_link_bundle_rcv(buf);
- continue;
- case NAME_DISTRIBUTOR:
- n_ptr->bclink.recv_permitted = true;
- tipc_node_unlock(n_ptr);
- tipc_named_rcv(buf);
- continue;
- case CONN_MANAGER:
+ if (tipc_link_prepare_input(l_ptr, &buf)) {
tipc_node_unlock(n_ptr);
- tipc_port_proto_rcv(buf);
continue;
- case BCAST_PROTOCOL:
- tipc_link_sync_rcv(n_ptr, buf);
- break;
- default:
- kfree_skb(buf);
- break;
}
tipc_node_unlock(n_ptr);
+ msg = buf_msg(buf);
+ if (tipc_link_input(l_ptr, buf) != 0)
+ goto discard;
continue;
unlock_discard:
tipc_node_unlock(n_ptr);
@@ -1625,6 +1477,80 @@ discard:
}
/**
+ * tipc_link_prepare_input - process TIPC link messages
+ *
+ * returns nonzero if the message was consumed
+ *
+ * Node lock must be held
+ */
+static int tipc_link_prepare_input(struct tipc_link *l, struct sk_buff **buf)
+{
+ struct tipc_node *n;
+ struct tipc_msg *msg;
+ int res = -EINVAL;
+
+ n = l->owner;
+ msg = buf_msg(*buf);
+ switch (msg_user(msg)) {
+ case CHANGEOVER_PROTOCOL:
+ if (tipc_link_tunnel_rcv(n, buf))
+ res = 0;
+ break;
+ case MSG_FRAGMENTER:
+ l->stats.recv_fragments++;
+ if (tipc_buf_append(&l->reasm_buf, buf)) {
+ l->stats.recv_fragmented++;
+ res = 0;
+ } else if (!l->reasm_buf) {
+ tipc_link_reset(l);
+ }
+ break;
+ case MSG_BUNDLER:
+ l->stats.recv_bundles++;
+ l->stats.recv_bundled += msg_msgcnt(msg);
+ res = 0;
+ break;
+ case NAME_DISTRIBUTOR:
+ n->bclink.recv_permitted = true;
+ res = 0;
+ break;
+ case BCAST_PROTOCOL:
+ tipc_link_sync_rcv(n, *buf);
+ break;
+ default:
+ res = 0;
+ }
+ return res;
+}
+/**
+ * tipc_link_input - Deliver message too higher layers
+ */
+static int tipc_link_input(struct tipc_link *l, struct sk_buff *buf)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ int res = 0;
+
+ switch (msg_user(msg)) {
+ case TIPC_LOW_IMPORTANCE:
+ case TIPC_MEDIUM_IMPORTANCE:
+ case TIPC_HIGH_IMPORTANCE:
+ case TIPC_CRITICAL_IMPORTANCE:
+ case CONN_MANAGER:
+ tipc_sk_rcv(buf);
+ break;
+ case NAME_DISTRIBUTOR:
+ tipc_named_rcv(buf);
+ break;
+ case MSG_BUNDLER:
+ tipc_link_bundle_rcv(buf);
+ break;
+ default:
+ res = -EINVAL;
+ }
+ return res;
+}
+
+/**
* tipc_link_defer_pkt - Add out-of-sequence message to deferred reception queue
*
* Returns increase in queue length (i.e. 0 or 1)
@@ -2217,6 +2143,7 @@ void tipc_link_bundle_rcv(struct sk_buff *buf)
u32 msgcount = msg_msgcnt(buf_msg(buf));
u32 pos = INT_H_SIZE;
struct sk_buff *obuf;
+ struct tipc_msg *omsg;
while (msgcount--) {
obuf = buf_extract(buf, pos);
@@ -2224,8 +2151,16 @@ void tipc_link_bundle_rcv(struct sk_buff *buf)
pr_warn("Link unable to unbundle message(s)\n");
break;
}
- pos += align(msg_size(buf_msg(obuf)));
- tipc_net_route_msg(obuf);
+ omsg = buf_msg(obuf);
+ pos += align(msg_size(omsg));
+ if (msg_isdata(omsg) || (msg_user(omsg) == CONN_MANAGER)) {
+ tipc_sk_rcv(obuf);
+ } else if (msg_user(omsg) == NAME_DISTRIBUTOR) {
+ tipc_named_rcv(obuf);
+ } else {
+ pr_warn("Illegal bundled msg: %u\n", msg_user(omsg));
+ kfree_skb(obuf);
+ }
}
kfree_skb(buf);
}
diff --git a/net/tipc/link.h b/net/tipc/link.h
index 200d518b218e..227ff8120897 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -227,8 +227,10 @@ void tipc_link_reset_all(struct tipc_node *node);
void tipc_link_reset(struct tipc_link *l_ptr);
void tipc_link_reset_list(unsigned int bearer_id);
int tipc_link_xmit(struct sk_buff *buf, u32 dest, u32 selector);
+int tipc_link_xmit2(struct sk_buff *buf, u32 dest, u32 selector);
void tipc_link_names_xmit(struct list_head *message_list, u32 dest);
int __tipc_link_xmit(struct tipc_link *l_ptr, struct sk_buff *buf);
+int __tipc_link_xmit2(struct tipc_link *link, struct sk_buff *buf);
int tipc_link_send_buf(struct tipc_link *l_ptr, struct sk_buff *buf);
u32 tipc_link_get_max_pkt(u32 dest, u32 selector);
int tipc_link_iovec_xmit_fast(struct tipc_port *sender,
diff --git a/net/tipc/msg.c b/net/tipc/msg.c
index 0a37a472c29f..ce6d929d66d2 100644
--- a/net/tipc/msg.c
+++ b/net/tipc/msg.c
@@ -36,21 +36,16 @@
#include "core.h"
#include "msg.h"
+#include "addr.h"
+#include "name_table.h"
-u32 tipc_msg_tot_importance(struct tipc_msg *m)
+#define MAX_FORWARD_SIZE 1024
+
+static unsigned int align(unsigned int i)
{
- if (likely(msg_isdata(m))) {
- if (likely(msg_orignode(m) == tipc_own_addr))
- return msg_importance(m);
- return msg_importance(m) + 4;
- }
- if ((msg_user(m) == MSG_FRAGMENTER) &&
- (msg_type(m) == FIRST_FRAGMENT))
- return msg_importance(msg_get_wrapped(m));
- return msg_importance(m);
+ return (i + 3) & ~3u;
}
-
void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize,
u32 destnode)
{
@@ -157,3 +152,268 @@ out_free:
*buf = *headbuf = NULL;
return 0;
}
+
+
+/**
+ * tipc_msg_build2 - create buffer chain containing specified header and data
+ * @mhdr: Message header, to be prepended to data
+ * @iov: User data
+ * @offset: Posision in iov to start copying from
+ * @dsz: Total length of user data
+ * @pktmax: Max packet size that can be used
+ * @chain: Buffer or chain of buffers to be returned to caller
+ * Returns message data size or errno: -ENOMEM, -EFAULT
+ */
+int tipc_msg_build2(struct tipc_msg *mhdr, struct iovec const *iov,
+ int offset, int dsz, int pktmax , struct sk_buff **chain)
+{
+ int mhsz = msg_hdr_sz(mhdr);
+ int msz = mhsz + dsz;
+ int pktno = 1;
+ int pktsz;
+ int pktrem = pktmax;
+ int drem = dsz;
+ struct tipc_msg pkthdr;
+ struct sk_buff *buf, *prev;
+ char *pktpos;
+ int rc;
+
+ msg_set_size(mhdr, msz);
+
+ /* No fragmentation needed? */
+ if (likely(msz <= pktmax)) {
+ buf = tipc_buf_acquire(msz);
+ *chain = buf;
+ if (unlikely(!buf))
+ return -ENOMEM;
+ skb_copy_to_linear_data(buf, mhdr, mhsz);
+ pktpos = buf->data + mhsz;
+ if (!dsz || !memcpy_fromiovecend(pktpos, iov, offset, dsz))
+ return dsz;
+ rc = -EFAULT;
+ goto error;
+ }
+
+ /* Prepare reusable fragment header */
+ tipc_msg_init(&pkthdr, MSG_FRAGMENTER, FIRST_FRAGMENT,
+ INT_H_SIZE, msg_destnode(mhdr));
+ msg_set_size(&pkthdr, pktmax);
+ msg_set_fragm_no(&pkthdr, pktno);
+
+ /* Prepare first fragment */
+ *chain = buf = tipc_buf_acquire(pktmax);
+ if (!buf)
+ return -ENOMEM;
+ pktpos = buf->data;
+ skb_copy_to_linear_data(buf, &pkthdr, INT_H_SIZE);
+ pktpos += INT_H_SIZE;
+ pktrem -= INT_H_SIZE;
+ skb_copy_to_linear_data_offset(buf, INT_H_SIZE, mhdr, mhsz);
+ pktpos += mhsz;
+ pktrem -= mhsz;
+
+ do {
+ if (drem < pktrem)
+ pktrem = drem;
+
+ if (memcpy_fromiovecend(pktpos, iov, offset, pktrem)) {
+ rc = -EFAULT;
+ goto error;
+ }
+ drem -= pktrem;
+ offset += pktrem;
+
+ if (!drem)
+ break;
+
+ /* Prepare new fragment: */
+ if (drem < (pktmax - INT_H_SIZE))
+ pktsz = drem + INT_H_SIZE;
+ else
+ pktsz = pktmax;
+ prev = buf;
+ buf = tipc_buf_acquire(pktsz);
+ if (!buf) {
+ rc = -ENOMEM;
+ goto error;
+ }
+ prev->next = buf;
+ msg_set_type(&pkthdr, FRAGMENT);
+ msg_set_size(&pkthdr, pktsz);
+ msg_set_fragm_no(&pkthdr, ++pktno);
+ skb_copy_to_linear_data(buf, &pkthdr, INT_H_SIZE);
+ pktpos = buf->data + INT_H_SIZE;
+ pktrem = pktsz - INT_H_SIZE;
+
+ } while (1);
+
+ msg_set_type(buf_msg(buf), LAST_FRAGMENT);
+ return dsz;
+error:
+ kfree_skb_list(*chain);
+ *chain = NULL;
+ return rc;
+}
+
+/**
+ * tipc_msg_bundle(): Append contents of a buffer to tail of an existing one
+ * @bbuf: the existing buffer ("bundle")
+ * @buf: buffer to be appended
+ * @mtu: max allowable size for the bundle buffer
+ * Consumes buffer if successful
+ * Returns true if bundling could be performed, otherwise false
+ */
+bool tipc_msg_bundle(struct sk_buff *bbuf, struct sk_buff *buf, u32 mtu)
+{
+ struct tipc_msg *bmsg = buf_msg(bbuf);
+ struct tipc_msg *msg = buf_msg(buf);
+ unsigned int bsz = msg_size(bmsg);
+ unsigned int msz = msg_size(msg);
+ u32 start = align(bsz);
+ u32 max = mtu - INT_H_SIZE;
+ u32 pad = start - bsz;
+
+ if (likely(msg_user(msg) == MSG_FRAGMENTER))
+ return false;
+ if (unlikely(msg_user(msg) == CHANGEOVER_PROTOCOL))
+ return false;
+ if (unlikely(msg_user(msg) == BCAST_PROTOCOL))
+ return false;
+ if (likely(msg_user(bmsg) != MSG_BUNDLER))
+ return false;
+ if (likely(msg_type(bmsg) != BUNDLE_OPEN))
+ return false;
+ if (unlikely(skb_tailroom(bbuf) < (pad + msz)))
+ return false;
+ if (unlikely(max < (start + msz)))
+ return false;
+
+ skb_put(bbuf, pad + msz);
+ skb_copy_to_linear_data_offset(bbuf, start, buf->data, msz);
+ msg_set_size(bmsg, start + msz);
+ msg_set_msgcnt(bmsg, msg_msgcnt(bmsg) + 1);
+ bbuf->next = buf->next;
+ kfree_skb(buf);
+ return true;
+}
+
+/**
+ * tipc_msg_make_bundle(): Create bundle buf and append message to its tail
+ * @buf: buffer to be appended and replaced
+ * @mtu: max allowable size for the bundle buffer, inclusive header
+ * @dnode: destination node for message. (Not always present in header)
+ * Replaces buffer if successful
+ * Returns true if sucess, otherwise false
+ */
+bool tipc_msg_make_bundle(struct sk_buff **buf, u32 mtu, u32 dnode)
+{
+ struct sk_buff *bbuf;
+ struct tipc_msg *bmsg;
+ struct tipc_msg *msg = buf_msg(*buf);
+ u32 msz = msg_size(msg);
+ u32 max = mtu - INT_H_SIZE;
+
+ if (msg_user(msg) == MSG_FRAGMENTER)
+ return false;
+ if (msg_user(msg) == CHANGEOVER_PROTOCOL)
+ return false;
+ if (msg_user(msg) == BCAST_PROTOCOL)
+ return false;
+ if (msz > (max / 2))
+ return false;
+
+ bbuf = tipc_buf_acquire(max);
+ if (!bbuf)
+ return false;
+
+ skb_trim(bbuf, INT_H_SIZE);
+ bmsg = buf_msg(bbuf);
+ tipc_msg_init(bmsg, MSG_BUNDLER, BUNDLE_OPEN, INT_H_SIZE, dnode);
+ msg_set_seqno(bmsg, msg_seqno(msg));
+ msg_set_ack(bmsg, msg_ack(msg));
+ msg_set_bcast_ack(bmsg, msg_bcast_ack(msg));
+ bbuf->next = (*buf)->next;
+ tipc_msg_bundle(bbuf, *buf, mtu);
+ *buf = bbuf;
+ return true;
+}
+
+/**
+ * tipc_msg_reverse(): swap source and destination addresses and add error code
+ * @buf: buffer containing message to be reversed
+ * @dnode: return value: node where to send message after reversal
+ * @err: error code to be set in message
+ * Consumes buffer if failure
+ * Returns true if success, otherwise false
+ */
+bool tipc_msg_reverse(struct sk_buff *buf, u32 *dnode, int err)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ uint imp = msg_importance(msg);
+ struct tipc_msg ohdr;
+ uint rdsz = min_t(uint, msg_data_sz(msg), MAX_FORWARD_SIZE);
+
+ if (skb_linearize(buf))
+ goto exit;
+ if (msg_dest_droppable(msg))
+ goto exit;
+ if (msg_errcode(msg))
+ goto exit;
+
+ memcpy(&ohdr, msg, msg_hdr_sz(msg));
+ imp = min_t(uint, imp + 1, TIPC_CRITICAL_IMPORTANCE);
+ if (msg_isdata(msg))
+ msg_set_importance(msg, imp);
+ msg_set_errcode(msg, err);
+ msg_set_origport(msg, msg_destport(&ohdr));
+ msg_set_destport(msg, msg_origport(&ohdr));
+ msg_set_prevnode(msg, tipc_own_addr);
+ if (!msg_short(msg)) {
+ msg_set_orignode(msg, msg_destnode(&ohdr));
+ msg_set_destnode(msg, msg_orignode(&ohdr));
+ }
+ msg_set_size(msg, msg_hdr_sz(msg) + rdsz);
+ skb_trim(buf, msg_size(msg));
+ skb_orphan(buf);
+ *dnode = msg_orignode(&ohdr);
+ return true;
+exit:
+ kfree_skb(buf);
+ return false;
+}
+
+/**
+ * tipc_msg_eval: determine fate of message that found no destination
+ * @buf: the buffer containing the message.
+ * @dnode: return value: next-hop node, if message to be forwarded
+ * @err: error code to use, if message to be rejected
+ *
+ * Does not consume buffer
+ * Returns 0 (TIPC_OK) if message ok and we can try again, -TIPC error
+ * code if message to be rejected
+ */
+int tipc_msg_eval(struct sk_buff *buf, u32 *dnode)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ u32 dport;
+
+ if (msg_type(msg) != TIPC_NAMED_MSG)
+ return -TIPC_ERR_NO_PORT;
+ if (skb_linearize(buf))
+ return -TIPC_ERR_NO_NAME;
+ if (msg_data_sz(msg) > MAX_FORWARD_SIZE)
+ return -TIPC_ERR_NO_NAME;
+ if (msg_reroute_cnt(msg) > 0)
+ return -TIPC_ERR_NO_NAME;
+
+ *dnode = addr_domain(msg_lookup_scope(msg));
+ dport = tipc_nametbl_translate(msg_nametype(msg),
+ msg_nameinst(msg),
+ dnode);
+ if (!dport)
+ return -TIPC_ERR_NO_NAME;
+ msg_incr_reroute_cnt(msg);
+ msg_set_destnode(msg, *dnode);
+ msg_set_destport(msg, dport);
+ return TIPC_OK;
+}
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 503511903d1d..7d574346e75e 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -463,6 +463,11 @@ static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
#define FRAGMENT 1
#define LAST_FRAGMENT 2
+/* Bundling protocol message types
+ */
+#define BUNDLE_OPEN 0
+#define BUNDLE_CLOSED 1
+
/*
* Link management protocol message types
*/
@@ -706,12 +711,37 @@ static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
msg_set_bits(m, 9, 0, 0xffff, n);
}
-u32 tipc_msg_tot_importance(struct tipc_msg *m);
+static inline u32 tipc_msg_tot_importance(struct tipc_msg *m)
+{
+ if ((msg_user(m) == MSG_FRAGMENTER) && (msg_type(m) == FIRST_FRAGMENT))
+ return msg_importance(msg_get_wrapped(m));
+ return msg_importance(m);
+}
+
+static inline u32 msg_tot_origport(struct tipc_msg *m)
+{
+ if ((msg_user(m) == MSG_FRAGMENTER) && (msg_type(m) == FIRST_FRAGMENT))
+ return msg_origport(msg_get_wrapped(m));
+ return msg_origport(m);
+}
+
+bool tipc_msg_reverse(struct sk_buff *buf, u32 *dnode, int err);
+
+int tipc_msg_eval(struct sk_buff *buf, u32 *dnode);
+
void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize,
u32 destnode);
+
int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
unsigned int len, int max_size, struct sk_buff **buf);
int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
+bool tipc_msg_bundle(struct sk_buff *bbuf, struct sk_buff *buf, u32 mtu);
+
+bool tipc_msg_make_bundle(struct sk_buff **buf, u32 mtu, u32 dnode);
+
+int tipc_msg_build2(struct tipc_msg *mhdr, struct iovec const *iov,
+ int offset, int dsz, int mtu , struct sk_buff **chain);
+
#endif
diff --git a/net/tipc/net.c b/net/tipc/net.c
index f64375e7f99f..7fcc94998fea 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -1,7 +1,7 @@
/*
* net/tipc/net.c: TIPC network routing code
*
- * Copyright (c) 1995-2006, Ericsson AB
+ * Copyright (c) 1995-2006, 2014, Ericsson AB
* Copyright (c) 2005, 2010-2011, Wind River Systems
* All rights reserved.
*
@@ -104,67 +104,6 @@
* - A local spin_lock protecting the queue of subscriber events.
*/
-static void net_route_named_msg(struct sk_buff *buf)
-{
- struct tipc_msg *msg = buf_msg(buf);
- u32 dnode;
- u32 dport;
-
- if (!msg_named(msg)) {
- kfree_skb(buf);
- return;
- }
-
- dnode = addr_domain(msg_lookup_scope(msg));
- dport = tipc_nametbl_translate(msg_nametype(msg), msg_nameinst(msg), &dnode);
- if (dport) {
- msg_set_destnode(msg, dnode);
- msg_set_destport(msg, dport);
- tipc_net_route_msg(buf);
- return;
- }
- tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
-}
-
-void tipc_net_route_msg(struct sk_buff *buf)
-{
- struct tipc_msg *msg;
- u32 dnode;
-
- if (!buf)
- return;
- msg = buf_msg(buf);
-
- /* Handle message for this node */
- dnode = msg_short(msg) ? tipc_own_addr : msg_destnode(msg);
- if (tipc_in_scope(dnode, tipc_own_addr)) {
- if (msg_isdata(msg)) {
- if (msg_mcast(msg))
- tipc_port_mcast_rcv(buf, NULL);
- else if (msg_destport(msg))
- tipc_sk_rcv(buf);
- else
- net_route_named_msg(buf);
- return;
- }
- switch (msg_user(msg)) {
- case NAME_DISTRIBUTOR:
- tipc_named_rcv(buf);
- break;
- case CONN_MANAGER:
- tipc_port_proto_rcv(buf);
- break;
- default:
- kfree_skb(buf);
- }
- return;
- }
-
- /* Handle message for another node */
- skb_trim(buf, msg_size(msg));
- tipc_link_xmit(buf, dnode, msg_link_selector(msg));
-}
-
int tipc_net_start(u32 addr)
{
char addr_string[16];
diff --git a/net/tipc/net.h b/net/tipc/net.h
index c6c2b46f7c28..59ef3388be2c 100644
--- a/net/tipc/net.h
+++ b/net/tipc/net.h
@@ -37,8 +37,6 @@
#ifndef _TIPC_NET_H
#define _TIPC_NET_H
-void tipc_net_route_msg(struct sk_buff *buf);
-
int tipc_net_start(u32 addr);
void tipc_net_stop(void);
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 5b44c3041be4..d959343043fd 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1,7 +1,7 @@
/*
* net/tipc/node.c: TIPC node management routines
*
- * Copyright (c) 2000-2006, 2012 Ericsson AB
+ * Copyright (c) 2000-2006, 2012-2014, Ericsson AB
* Copyright (c) 2005-2006, 2010-2014, Wind River Systems
* All rights reserved.
*
@@ -155,21 +155,25 @@ void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
if (!active[0]) {
active[0] = active[1] = l_ptr;
node_established_contact(n_ptr);
- return;
+ goto exit;
}
if (l_ptr->priority < active[0]->priority) {
pr_info("New link <%s> becomes standby\n", l_ptr->name);
- return;
+ goto exit;
}
tipc_link_dup_queue_xmit(active[0], l_ptr);
if (l_ptr->priority == active[0]->priority) {
active[0] = l_ptr;
- return;
+ goto exit;
}
pr_info("Old link <%s> becomes standby\n", active[0]->name);
if (active[1] != active[0])
pr_info("Old link <%s> becomes standby\n", active[1]->name);
active[0] = active[1] = l_ptr;
+exit:
+ /* Leave room for changeover header when returning 'mtu' to users: */
+ n_ptr->act_mtus[0] = active[0]->max_pkt - INT_H_SIZE;
+ n_ptr->act_mtus[1] = active[1]->max_pkt - INT_H_SIZE;
}
/**
@@ -229,6 +233,19 @@ void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
tipc_link_failover_send_queue(l_ptr);
else
node_lost_contact(n_ptr);
+
+ /* Leave room for changeover header when returning 'mtu' to users: */
+ if (active[0]) {
+ n_ptr->act_mtus[0] = active[0]->max_pkt - INT_H_SIZE;
+ n_ptr->act_mtus[1] = active[1]->max_pkt - INT_H_SIZE;
+ return;
+ }
+
+ /* Loopback link went down? No fragmentation needed from now on. */
+ if (n_ptr->addr == tipc_own_addr) {
+ n_ptr->act_mtus[0] = MAX_MSG_SIZE;
+ n_ptr->act_mtus[1] = MAX_MSG_SIZE;
+ }
}
int tipc_node_active_links(struct tipc_node *n_ptr)
diff --git a/net/tipc/node.h b/net/tipc/node.h
index 9087063793f2..b61716a8218e 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -41,6 +41,7 @@
#include "addr.h"
#include "net.h"
#include "bearer.h"
+#include "msg.h"
/*
* Out-of-range value for node signature
@@ -105,6 +106,7 @@ struct tipc_node {
spinlock_t lock;
struct hlist_node hash;
struct tipc_link *active_links[2];
+ u32 act_mtus[2];
struct tipc_link *links[MAX_BEARERS];
unsigned int action_flags;
struct tipc_node_bclink bclink;
@@ -143,4 +145,19 @@ static inline bool tipc_node_blocked(struct tipc_node *node)
TIPC_NOTIFY_NODE_DOWN | TIPC_WAIT_OWN_LINKS_DOWN));
}
+static inline uint tipc_node_get_mtu(u32 addr, u32 selector)
+{
+ struct tipc_node *node;
+ u32 mtu;
+
+ node = tipc_node_find(addr);
+
+ if (likely(node))
+ mtu = node->act_mtus[selector & 1];
+ else
+ mtu = MAX_MSG_SIZE;
+
+ return mtu;
+}
+
#endif
diff --git a/net/tipc/node_subscr.c b/net/tipc/node_subscr.c
index 7c59ab1d6ecb..2d13eea8574a 100644
--- a/net/tipc/node_subscr.c
+++ b/net/tipc/node_subscr.c
@@ -84,11 +84,13 @@ void tipc_nodesub_unsubscribe(struct tipc_node_subscr *node_sub)
void tipc_nodesub_notify(struct list_head *nsub_list)
{
struct tipc_node_subscr *ns, *safe;
+ net_ev_handler handle_node_down;
list_for_each_entry_safe(ns, safe, nsub_list, nodesub_list) {
- if (ns->handle_node_down) {
- ns->handle_node_down(ns->usr_handle);
+ handle_node_down = ns->handle_node_down;
+ if (handle_node_down) {
ns->handle_node_down = NULL;
+ handle_node_down(ns->usr_handle);
}
}
}
diff --git a/net/tipc/port.c b/net/tipc/port.c
index 5fd7acce01ea..0d09dcb6da18 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -42,8 +42,6 @@
/* Connection management: */
#define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
-#define CONFIRMED 0
-#define PROBING 1
#define MAX_REJECT_SIZE 1024
@@ -188,12 +186,6 @@ exit:
tipc_port_list_free(dp);
}
-
-void tipc_port_wakeup(struct tipc_port *port)
-{
- tipc_sock_wakeup(tipc_port_to_sock(port));
-}
-
/* tipc_port_init - intiate TIPC port and lock it
*
* Returns obtained reference if initialization is successful, zero otherwise
@@ -235,6 +227,8 @@ u32 tipc_port_init(struct tipc_port *p_ptr,
void tipc_port_destroy(struct tipc_port *p_ptr)
{
struct sk_buff *buf = NULL;
+ struct tipc_msg *msg = NULL;
+ u32 peer;
tipc_withdraw(p_ptr, 0, NULL);
@@ -246,14 +240,15 @@ void tipc_port_destroy(struct tipc_port *p_ptr)
if (p_ptr->connected) {
buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
tipc_nodesub_unsubscribe(&p_ptr->subscription);
+ msg = buf_msg(buf);
+ peer = msg_destnode(msg);
+ tipc_link_xmit2(buf, peer, msg_link_selector(msg));
}
-
spin_lock_bh(&tipc_port_list_lock);
list_del(&p_ptr->port_list);
list_del(&p_ptr->wait_list);
spin_unlock_bh(&tipc_port_list_lock);
k_term_timer(&p_ptr->timer);
- tipc_net_route_msg(buf);
}
/*
@@ -275,100 +270,16 @@ static struct sk_buff *port_build_proto_msg(struct tipc_port *p_ptr,
msg_set_destport(msg, tipc_port_peerport(p_ptr));
msg_set_origport(msg, p_ptr->ref);
msg_set_msgcnt(msg, ack);
+ buf->next = NULL;
}
return buf;
}
-int tipc_reject_msg(struct sk_buff *buf, u32 err)
-{
- struct tipc_msg *msg = buf_msg(buf);
- struct sk_buff *rbuf;
- struct tipc_msg *rmsg;
- int hdr_sz;
- u32 imp;
- u32 data_sz = msg_data_sz(msg);
- u32 src_node;
- u32 rmsg_sz;
-
- /* discard rejected message if it shouldn't be returned to sender */
- if (WARN(!msg_isdata(msg),
- "attempt to reject message with user=%u", msg_user(msg))) {
- dump_stack();
- goto exit;
- }
- if (msg_errcode(msg) || msg_dest_droppable(msg))
- goto exit;
-
- /*
- * construct returned message by copying rejected message header and
- * data (or subset), then updating header fields that need adjusting
- */
- hdr_sz = msg_hdr_sz(msg);
- rmsg_sz = hdr_sz + min_t(u32, data_sz, MAX_REJECT_SIZE);
-
- rbuf = tipc_buf_acquire(rmsg_sz);
- if (rbuf == NULL)
- goto exit;
-
- rmsg = buf_msg(rbuf);
- skb_copy_to_linear_data(rbuf, msg, rmsg_sz);
-
- if (msg_connected(rmsg)) {
- imp = msg_importance(rmsg);
- if (imp < TIPC_CRITICAL_IMPORTANCE)
- msg_set_importance(rmsg, ++imp);
- }
- msg_set_non_seq(rmsg, 0);
- msg_set_size(rmsg, rmsg_sz);
- msg_set_errcode(rmsg, err);
- msg_set_prevnode(rmsg, tipc_own_addr);
- msg_swap_words(rmsg, 4, 5);
- if (!msg_short(rmsg))
- msg_swap_words(rmsg, 6, 7);
-
- /* send self-abort message when rejecting on a connected port */
- if (msg_connected(msg)) {
- struct tipc_port *p_ptr = tipc_port_lock(msg_destport(msg));
-
- if (p_ptr) {
- struct sk_buff *abuf = NULL;
-
- if (p_ptr->connected)
- abuf = port_build_self_abort_msg(p_ptr, err);
- tipc_port_unlock(p_ptr);
- tipc_net_route_msg(abuf);
- }
- }
-
- /* send returned message & dispose of rejected message */
- src_node = msg_prevnode(msg);
- if (in_own_node(src_node))
- tipc_sk_rcv(rbuf);
- else
- tipc_link_xmit(rbuf, src_node, msg_link_selector(rmsg));
-exit:
- kfree_skb(buf);
- return data_sz;
-}
-
-int tipc_port_iovec_reject(struct tipc_port *p_ptr, struct tipc_msg *hdr,
- struct iovec const *msg_sect, unsigned int len,
- int err)
-{
- struct sk_buff *buf;
- int res;
-
- res = tipc_msg_build(hdr, msg_sect, len, MAX_MSG_SIZE, &buf);
- if (!buf)
- return res;
-
- return tipc_reject_msg(buf, err);
-}
-
static void port_timeout(unsigned long ref)
{
struct tipc_port *p_ptr = tipc_port_lock(ref);
struct sk_buff *buf = NULL;
+ struct tipc_msg *msg = NULL;
if (!p_ptr)
return;
@@ -379,15 +290,16 @@ static void port_timeout(unsigned long ref)
}
/* Last probe answered ? */
- if (p_ptr->probing_state == PROBING) {
+ if (p_ptr->probing_state == TIPC_CONN_PROBING) {
buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
} else {
buf = port_build_proto_msg(p_ptr, CONN_PROBE, 0);
- p_ptr->probing_state = PROBING;
+ p_ptr->probing_state = TIPC_CONN_PROBING;
k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
}
tipc_port_unlock(p_ptr);
- tipc_net_route_msg(buf);
+ msg = buf_msg(buf);
+ tipc_link_xmit2(buf, msg_destnode(msg), msg_link_selector(msg));
}
@@ -395,12 +307,14 @@ static void port_handle_node_down(unsigned long ref)
{
struct tipc_port *p_ptr = tipc_port_lock(ref);
struct sk_buff *buf = NULL;
+ struct tipc_msg *msg = NULL;
if (!p_ptr)
return;
buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
tipc_port_unlock(p_ptr);
- tipc_net_route_msg(buf);
+ msg = buf_msg(buf);
+ tipc_link_xmit2(buf, msg_destnode(msg), msg_link_selector(msg));
}
@@ -412,6 +326,7 @@ static struct sk_buff *port_build_self_abort_msg(struct tipc_port *p_ptr, u32 er
struct tipc_msg *msg = buf_msg(buf);
msg_swap_words(msg, 4, 5);
msg_swap_words(msg, 6, 7);
+ buf->next = NULL;
}
return buf;
}
@@ -436,60 +351,11 @@ static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *p_ptr, u32 er
if (imp < TIPC_CRITICAL_IMPORTANCE)
msg_set_importance(msg, ++imp);
msg_set_errcode(msg, err);
+ buf->next = NULL;
}
return buf;
}
-void tipc_port_proto_rcv(struct sk_buff *buf)
-{
- struct tipc_msg *msg = buf_msg(buf);
- struct tipc_port *p_ptr;
- struct sk_buff *r_buf = NULL;
- u32 destport = msg_destport(msg);
- int wakeable;
-
- /* Validate connection */
- p_ptr = tipc_port_lock(destport);
- if (!p_ptr || !p_ptr->connected || !tipc_port_peer_msg(p_ptr, msg)) {
- r_buf = tipc_buf_acquire(BASIC_H_SIZE);
- if (r_buf) {
- msg = buf_msg(r_buf);
- tipc_msg_init(msg, TIPC_HIGH_IMPORTANCE, TIPC_CONN_MSG,
- BASIC_H_SIZE, msg_orignode(msg));
- msg_set_errcode(msg, TIPC_ERR_NO_PORT);
- msg_set_origport(msg, destport);
- msg_set_destport(msg, msg_origport(msg));
- }
- if (p_ptr)
- tipc_port_unlock(p_ptr);
- goto exit;
- }
-
- /* Process protocol message sent by peer */
- switch (msg_type(msg)) {
- case CONN_ACK:
- wakeable = tipc_port_congested(p_ptr) && p_ptr->congested;
- p_ptr->acked += msg_msgcnt(msg);
- if (!tipc_port_congested(p_ptr)) {
- p_ptr->congested = 0;
- if (wakeable)
- tipc_port_wakeup(p_ptr);
- }
- break;
- case CONN_PROBE:
- r_buf = port_build_proto_msg(p_ptr, CONN_PROBE_REPLY, 0);
- break;
- default:
- /* CONN_PROBE_REPLY or unrecognized - no action required */
- break;
- }
- p_ptr->probing_state = CONFIRMED;
- tipc_port_unlock(p_ptr);
-exit:
- tipc_net_route_msg(r_buf);
- kfree_skb(buf);
-}
-
static int port_print(struct tipc_port *p_ptr, char *buf, int len, int full_id)
{
struct publication *publ;
@@ -581,16 +447,19 @@ void tipc_acknowledge(u32 ref, u32 ack)
{
struct tipc_port *p_ptr;
struct sk_buff *buf = NULL;
+ struct tipc_msg *msg;
p_ptr = tipc_port_lock(ref);
if (!p_ptr)
return;
- if (p_ptr->connected) {
- p_ptr->conn_unacked -= ack;
+ if (p_ptr->connected)
buf = port_build_proto_msg(p_ptr, CONN_ACK, ack);
- }
+
tipc_port_unlock(p_ptr);
- tipc_net_route_msg(buf);
+ if (!buf)
+ return;
+ msg = buf_msg(buf);
+ tipc_link_xmit2(buf, msg_destnode(msg), msg_link_selector(msg));
}
int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
@@ -689,7 +558,7 @@ int __tipc_port_connect(u32 ref, struct tipc_port *p_ptr,
msg_set_hdr_sz(msg, SHORT_H_SIZE);
p_ptr->probing_interval = PROBING_INTERVAL;
- p_ptr->probing_state = CONFIRMED;
+ p_ptr->probing_state = TIPC_CONN_OK;
p_ptr->connected = 1;
k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
@@ -698,7 +567,7 @@ int __tipc_port_connect(u32 ref, struct tipc_port *p_ptr,
(net_ev_handler)port_handle_node_down);
res = 0;
exit:
- p_ptr->max_pkt = tipc_link_get_max_pkt(peer->node, ref);
+ p_ptr->max_pkt = tipc_node_get_mtu(peer->node, ref);
return res;
}
@@ -741,6 +610,7 @@ int tipc_port_disconnect(u32 ref)
*/
int tipc_port_shutdown(u32 ref)
{
+ struct tipc_msg *msg;
struct tipc_port *p_ptr;
struct sk_buff *buf = NULL;
@@ -750,149 +620,7 @@ int tipc_port_shutdown(u32 ref)
buf = port_build_peer_abort_msg(p_ptr, TIPC_CONN_SHUTDOWN);
tipc_port_unlock(p_ptr);
- tipc_net_route_msg(buf);
+ msg = buf_msg(buf);
+ tipc_link_xmit2(buf, msg_destnode(msg), msg_link_selector(msg));
return tipc_port_disconnect(ref);
}
-
-/*
- * tipc_port_iovec_rcv: Concatenate and deliver sectioned
- * message for this node.
- */
-static int tipc_port_iovec_rcv(struct tipc_port *sender,
- struct iovec const *msg_sect,
- unsigned int len)
-{
- struct sk_buff *buf;
- int res;
-
- res = tipc_msg_build(&sender->phdr, msg_sect, len, MAX_MSG_SIZE, &buf);
- if (likely(buf))
- tipc_sk_rcv(buf);
- return res;
-}
-
-/**
- * tipc_send - send message sections on connection
- */
-int tipc_send(struct tipc_port *p_ptr,
- struct iovec const *msg_sect,
- unsigned int len)
-{
- u32 destnode;
- int res;
-
- if (!p_ptr->connected)
- return -EINVAL;
-
- p_ptr->congested = 1;
- if (!tipc_port_congested(p_ptr)) {
- destnode = tipc_port_peernode(p_ptr);
- if (likely(!in_own_node(destnode)))
- res = tipc_link_iovec_xmit_fast(p_ptr, msg_sect, len,
- destnode);
- else
- res = tipc_port_iovec_rcv(p_ptr, msg_sect, len);
-
- if (likely(res != -ELINKCONG)) {
- p_ptr->congested = 0;
- if (res > 0)
- p_ptr->sent++;
- return res;
- }
- }
- if (tipc_port_unreliable(p_ptr)) {
- p_ptr->congested = 0;
- return len;
- }
- return -ELINKCONG;
-}
-
-/**
- * tipc_send2name - send message sections to port name
- */
-int tipc_send2name(struct tipc_port *p_ptr,
- struct tipc_name const *name,
- unsigned int domain,
- struct iovec const *msg_sect,
- unsigned int len)
-{
- struct tipc_msg *msg;
- u32 destnode = domain;
- u32 destport;
- int res;
-
- if (p_ptr->connected)
- return -EINVAL;
-
- msg = &p_ptr->phdr;
- msg_set_type(msg, TIPC_NAMED_MSG);
- msg_set_hdr_sz(msg, NAMED_H_SIZE);
- msg_set_nametype(msg, name->type);
- msg_set_nameinst(msg, name->instance);
- msg_set_lookup_scope(msg, tipc_addr_scope(domain));
- destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
- msg_set_destnode(msg, destnode);
- msg_set_destport(msg, destport);
-
- if (likely(destport || destnode)) {
- if (likely(in_own_node(destnode)))
- res = tipc_port_iovec_rcv(p_ptr, msg_sect, len);
- else if (tipc_own_addr)
- res = tipc_link_iovec_xmit_fast(p_ptr, msg_sect, len,
- destnode);
- else
- res = tipc_port_iovec_reject(p_ptr, msg, msg_sect,
- len, TIPC_ERR_NO_NODE);
- if (likely(res != -ELINKCONG)) {
- if (res > 0)
- p_ptr->sent++;
- return res;
- }
- if (tipc_port_unreliable(p_ptr))
- return len;
-
- return -ELINKCONG;
- }
- return tipc_port_iovec_reject(p_ptr, msg, msg_sect, len,
- TIPC_ERR_NO_NAME);
-}
-
-/**
- * tipc_send2port - send message sections to port identity
- */
-int tipc_send2port(struct tipc_port *p_ptr,
- struct tipc_portid const *dest,
- struct iovec const *msg_sect,
- unsigned int len)
-{
- struct tipc_msg *msg;
- int res;
-
- if (p_ptr->connected)
- return -EINVAL;
-
- msg = &p_ptr->phdr;
- msg_set_type(msg, TIPC_DIRECT_MSG);
- msg_set_lookup_scope(msg, 0);
- msg_set_destnode(msg, dest->node);
- msg_set_destport(msg, dest->ref);
- msg_set_hdr_sz(msg, BASIC_H_SIZE);
-
- if (in_own_node(dest->node))
- res = tipc_port_iovec_rcv(p_ptr, msg_sect, len);
- else if (tipc_own_addr)
- res = tipc_link_iovec_xmit_fast(p_ptr, msg_sect, len,
- dest->node);
- else
- res = tipc_port_iovec_reject(p_ptr, msg, msg_sect, len,
- TIPC_ERR_NO_NODE);
- if (likely(res != -ELINKCONG)) {
- if (res > 0)
- p_ptr->sent++;
- return res;
- }
- if (tipc_port_unreliable(p_ptr))
- return len;
-
- return -ELINKCONG;
-}
diff --git a/net/tipc/port.h b/net/tipc/port.h
index cf4ca5b1d9a4..0e47052daa29 100644
--- a/net/tipc/port.h
+++ b/net/tipc/port.h
@@ -53,17 +53,13 @@
* @connected: non-zero if port is currently connected to a peer port
* @conn_type: TIPC type used when connection was established
* @conn_instance: TIPC instance used when connection was established
- * @conn_unacked: number of unacknowledged messages received from peer port
* @published: non-zero if port has one or more associated names
- * @congested: non-zero if cannot send because of link or port congestion
* @max_pkt: maximum packet size "hint" used when building messages sent by port
* @ref: unique reference to port in TIPC object registry
* @phdr: preformatted message header used when sending messages
* @port_list: adjacent ports in TIPC's global list of ports
* @wait_list: adjacent ports in list of ports waiting on link congestion
* @waiting_pkts:
- * @sent: # of non-empty messages sent by port
- * @acked: # of non-empty message acknowledgements from connected port's peer
* @publications: list of publications for port
* @pub_count: total # of publications port has made during its lifetime
* @probing_state:
@@ -76,17 +72,13 @@ struct tipc_port {
int connected;
u32 conn_type;
u32 conn_instance;
- u32 conn_unacked;
int published;
- u32 congested;
u32 max_pkt;
u32 ref;
struct tipc_msg phdr;
struct list_head port_list;
struct list_head wait_list;
u32 waiting_pkts;
- u32 sent;
- u32 acked;
struct list_head publications;
u32 pub_count;
u32 probing_state;
@@ -104,8 +96,6 @@ struct tipc_port_list;
u32 tipc_port_init(struct tipc_port *p_ptr,
const unsigned int importance);
-int tipc_reject_msg(struct sk_buff *buf, u32 err);
-
void tipc_acknowledge(u32 port_ref, u32 ack);
void tipc_port_destroy(struct tipc_port *p_ptr);
@@ -122,8 +112,6 @@ int tipc_port_disconnect(u32 portref);
int tipc_port_shutdown(u32 ref);
-void tipc_port_wakeup(struct tipc_port *port);
-
/*
* The following routines require that the port be locked on entry
*/
@@ -136,34 +124,12 @@ int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg);
* TIPC messaging routines
*/
-int tipc_send(struct tipc_port *port,
- struct iovec const *msg_sect,
- unsigned int len);
-
-int tipc_send2name(struct tipc_port *port,
- struct tipc_name const *name,
- u32 domain,
- struct iovec const *msg_sect,
- unsigned int len);
-
-int tipc_send2port(struct tipc_port *port,
- struct tipc_portid const *dest,
- struct iovec const *msg_sect,
- unsigned int len);
-
int tipc_port_mcast_xmit(struct tipc_port *port,
struct tipc_name_seq const *seq,
struct iovec const *msg,
unsigned int len);
-int tipc_port_iovec_reject(struct tipc_port *p_ptr,
- struct tipc_msg *hdr,
- struct iovec const *msg_sect,
- unsigned int len,
- int err);
-
struct sk_buff *tipc_port_get_ports(void);
-void tipc_port_proto_rcv(struct sk_buff *buf);
void tipc_port_mcast_rcv(struct sk_buff *buf, struct tipc_port_list *dp);
void tipc_port_reinit(void);
@@ -185,12 +151,6 @@ static inline void tipc_port_unlock(struct tipc_port *p_ptr)
spin_unlock_bh(p_ptr->lock);
}
-static inline int tipc_port_congested(struct tipc_port *p_ptr)
-{
- return ((p_ptr->sent - p_ptr->acked) >= TIPC_FLOWCTRL_WIN);
-}
-
-
static inline u32 tipc_port_peernode(struct tipc_port *p_ptr)
{
return msg_destnode(&p_ptr->phdr);
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index ef0475568f9e..de01622672b2 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -36,14 +36,17 @@
#include "core.h"
#include "port.h"
+#include "name_table.h"
#include "node.h"
-
+#include "link.h"
#include <linux/export.h>
+#include "link.h"
#define SS_LISTENING -1 /* socket is listening */
#define SS_READY -2 /* socket is connectionless */
#define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
+#define TIPC_FWD_MSG 1
static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb);
static void tipc_data_ready(struct sock *sk);
@@ -123,9 +126,12 @@ static void advance_rx_queue(struct sock *sk)
static void reject_rx_queue(struct sock *sk)
{
struct sk_buff *buf;
+ u32 dnode;
- while ((buf = __skb_dequeue(&sk->sk_receive_queue)))
- tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
+ while ((buf = __skb_dequeue(&sk->sk_receive_queue))) {
+ if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT))
+ tipc_link_xmit2(buf, dnode, 0);
+ }
}
/**
@@ -201,6 +207,7 @@ static int tipc_sk_create(struct net *net, struct socket *sock,
sk->sk_data_ready = tipc_data_ready;
sk->sk_write_space = tipc_write_space;
tsk->conn_timeout = CONN_TIMEOUT_DEFAULT;
+ tsk->sent_unacked = 0;
atomic_set(&tsk->dupl_rcvcnt, 0);
tipc_port_unlock(port);
@@ -303,6 +310,7 @@ static int tipc_release(struct socket *sock)
struct tipc_sock *tsk;
struct tipc_port *port;
struct sk_buff *buf;
+ u32 dnode;
/*
* Exit if socket isn't fully initialized (occurs when a failed accept()
@@ -331,7 +339,8 @@ static int tipc_release(struct socket *sock)
sock->state = SS_DISCONNECTING;
tipc_port_disconnect(port->ref);
}
- tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
+ if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT))
+ tipc_link_xmit2(buf, dnode, 0);
}
}
@@ -504,12 +513,12 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
switch ((int)sock->state) {
case SS_UNCONNECTED:
- if (!tsk->port.congested)
+ if (!tsk->link_cong)
mask |= POLLOUT;
break;
case SS_READY:
case SS_CONNECTED:
- if (!tsk->port.congested)
+ if (!tsk->link_cong && !tipc_sk_conn_cong(tsk))
mask |= POLLOUT;
/* fall thru' */
case SS_CONNECTING:
@@ -526,6 +535,43 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
}
/**
+ * tipc_sk_proto_rcv - receive a connection mng protocol message
+ * @tsk: receiving socket
+ * @dnode: node to send response message to, if any
+ * @buf: buffer containing protocol message
+ * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if
+ * (CONN_PROBE_REPLY) message should be forwarded.
+ */
+int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, struct sk_buff *buf)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ struct tipc_port *port = &tsk->port;
+ int conn_cong;
+
+ /* Ignore if connection cannot be validated: */
+ if (!port->connected || !tipc_port_peer_msg(port, msg))
+ goto exit;
+
+ port->probing_state = TIPC_CONN_OK;
+
+ if (msg_type(msg) == CONN_ACK) {
+ conn_cong = tipc_sk_conn_cong(tsk);
+ tsk->sent_unacked -= msg_msgcnt(msg);
+ if (conn_cong)
+ tipc_sock_wakeup(tsk);
+ } else if (msg_type(msg) == CONN_PROBE) {
+ if (!tipc_msg_reverse(buf, dnode, TIPC_OK))
+ return TIPC_OK;
+ msg_set_type(msg, CONN_PROBE_REPLY);
+ return TIPC_FWD_MSG;
+ }
+ /* Do nothing if msg_type() == CONN_PROBE_REPLY */
+exit:
+ kfree_skb(buf);
+ 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
@@ -539,6 +585,8 @@ 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))
@@ -575,19 +623,55 @@ static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p)
return sock_intr_errno(*timeo_p);
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
- done = sk_wait_event(sk, timeo_p, !tsk->port.congested);
+ done = sk_wait_event(sk, timeo_p, !tsk->link_cong);
finish_wait(sk_sleep(sk), &wait);
} while (!done);
return 0;
}
+/**
+ * tipc_sendmcast - send multicast message
+ * @sock: socket structure
+ * @seq: destination address
+ * @iov: message data to send
+ * @dsz: total length of message data
+ * @timeo: timeout to wait for wakeup
+ *
+ * Called from function tipc_sendmsg(), which has done all sanity checks
+ * 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 sock *sk = sock->sk;
+ struct tipc_sock *tsk = tipc_sk(sk);
+ int rc;
+
+ do {
+ if (sock->state != SS_READY) {
+ rc = -EOPNOTSUPP;
+ break;
+ }
+ rc = tipc_port_mcast_xmit(&tsk->port, seq, iov, dsz);
+ if (likely(rc >= 0)) {
+ if (sock->state != SS_READY)
+ sock->state = SS_CONNECTING;
+ break;
+ }
+ if (rc != -ELINKCONG)
+ break;
+ rc = tipc_wait_for_sndmsg(sock, &timeo);
+ } while (!rc);
+
+ return rc;
+}
/**
* tipc_sendmsg - send message in connectionless manner
* @iocb: if NULL, indicates that socket lock is already held
* @sock: socket structure
* @m: message to send
- * @total_len: length of message
+ * @dsz: amount of user data to be sent
*
* Message must have an destination specified explicitly.
* Used for SOCK_RDM and SOCK_DGRAM messages,
@@ -597,100 +681,123 @@ static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p)
* Returns the number of bytes sent on success, or errno otherwise
*/
static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock,
- struct msghdr *m, size_t total_len)
+ struct msghdr *m, size_t dsz)
{
+ DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_port *port = &tsk->port;
- DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
- int needs_conn;
+ struct tipc_msg *mhdr = &port->phdr;
+ struct iovec *iov = m->msg_iov;
+ u32 dnode, dport;
+ struct sk_buff *buf;
+ struct tipc_name_seq *seq = &dest->addr.nameseq;
+ u32 mtu;
long timeo;
- int res = -EINVAL;
+ int rc = -EINVAL;
if (unlikely(!dest))
return -EDESTADDRREQ;
+
if (unlikely((m->msg_namelen < sizeof(*dest)) ||
(dest->family != AF_TIPC)))
return -EINVAL;
- if (total_len > TIPC_MAX_USER_MSG_SIZE)
+
+ if (dsz > TIPC_MAX_USER_MSG_SIZE)
return -EMSGSIZE;
if (iocb)
lock_sock(sk);
- needs_conn = (sock->state != SS_READY);
- if (unlikely(needs_conn)) {
+ if (unlikely(sock->state != SS_READY)) {
if (sock->state == SS_LISTENING) {
- res = -EPIPE;
+ rc = -EPIPE;
goto exit;
}
if (sock->state != SS_UNCONNECTED) {
- res = -EISCONN;
+ rc = -EISCONN;
goto exit;
}
if (tsk->port.published) {
- res = -EOPNOTSUPP;
+ rc = -EOPNOTSUPP;
goto exit;
}
if (dest->addrtype == TIPC_ADDR_NAME) {
tsk->port.conn_type = dest->addr.name.name.type;
tsk->port.conn_instance = dest->addr.name.name.instance;
}
-
- /* Abort any pending connection attempts (very unlikely) */
- reject_rx_queue(sk);
}
+ rc = dest_name_check(dest, m);
+ if (rc)
+ goto exit;
timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
- do {
- if (dest->addrtype == TIPC_ADDR_NAME) {
- res = dest_name_check(dest, m);
- if (res)
- break;
- res = tipc_send2name(port,
- &dest->addr.name.name,
- dest->addr.name.domain,
- m->msg_iov,
- total_len);
- } else if (dest->addrtype == TIPC_ADDR_ID) {
- res = tipc_send2port(port,
- &dest->addr.id,
- m->msg_iov,
- total_len);
- } else if (dest->addrtype == TIPC_ADDR_MCAST) {
- if (needs_conn) {
- res = -EOPNOTSUPP;
- break;
- }
- res = dest_name_check(dest, m);
- if (res)
- break;
- res = tipc_port_mcast_xmit(port,
- &dest->addr.nameseq,
- m->msg_iov,
- total_len);
+
+ if (dest->addrtype == TIPC_ADDR_MCAST) {
+ rc = tipc_sendmcast(sock, seq, iov, dsz, timeo);
+ goto exit;
+ } else if (dest->addrtype == TIPC_ADDR_NAME) {
+ u32 type = dest->addr.name.name.type;
+ u32 inst = dest->addr.name.name.instance;
+ u32 domain = dest->addr.name.domain;
+
+ dnode = domain;
+ msg_set_type(mhdr, TIPC_NAMED_MSG);
+ msg_set_hdr_sz(mhdr, NAMED_H_SIZE);
+ msg_set_nametype(mhdr, type);
+ msg_set_nameinst(mhdr, inst);
+ msg_set_lookup_scope(mhdr, tipc_addr_scope(domain));
+ dport = tipc_nametbl_translate(type, inst, &dnode);
+ msg_set_destnode(mhdr, dnode);
+ msg_set_destport(mhdr, dport);
+ if (unlikely(!dport && !dnode)) {
+ rc = -EHOSTUNREACH;
+ goto exit;
}
- if (likely(res != -ELINKCONG)) {
- if (needs_conn && (res >= 0))
+ } else if (dest->addrtype == TIPC_ADDR_ID) {
+ dnode = dest->addr.id.node;
+ msg_set_type(mhdr, TIPC_DIRECT_MSG);
+ msg_set_lookup_scope(mhdr, 0);
+ msg_set_destnode(mhdr, dnode);
+ msg_set_destport(mhdr, dest->addr.id.ref);
+ msg_set_hdr_sz(mhdr, BASIC_H_SIZE);
+ }
+
+new_mtu:
+ mtu = tipc_node_get_mtu(dnode, tsk->port.ref);
+ rc = tipc_msg_build2(mhdr, iov, 0, dsz, mtu, &buf);
+ if (rc < 0)
+ goto exit;
+
+ do {
+ rc = tipc_link_xmit2(buf, dnode, tsk->port.ref);
+ if (likely(rc >= 0)) {
+ if (sock->state != SS_READY)
sock->state = SS_CONNECTING;
+ rc = dsz;
break;
}
- res = tipc_wait_for_sndmsg(sock, &timeo);
- if (res)
+ if (rc == -EMSGSIZE)
+ goto new_mtu;
+
+ if (rc != -ELINKCONG)
break;
- } while (1);
+ rc = tipc_wait_for_sndmsg(sock, &timeo);
+ if (rc)
+ kfree_skb_list(buf);
+ } while (!rc);
exit:
if (iocb)
release_sock(sk);
- return res;
+
+ return rc;
}
static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p)
{
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
- struct tipc_port *port = &tsk->port;
DEFINE_WAIT(wait);
int done;
@@ -709,37 +816,49 @@ static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p)
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
done = sk_wait_event(sk, timeo_p,
- (!port->congested || !port->connected));
+ (!tsk->link_cong &&
+ !tipc_sk_conn_cong(tsk)) ||
+ !tsk->port.connected);
finish_wait(sk_sleep(sk), &wait);
} while (!done);
return 0;
}
/**
- * tipc_send_packet - send a connection-oriented message
- * @iocb: if NULL, indicates that socket lock is already held
+ * tipc_send_stream - send stream-oriented data
+ * @iocb: (unused)
* @sock: socket structure
- * @m: message to send
- * @total_len: length of message
+ * @m: data to send
+ * @dsz: total length of data to be transmitted
*
- * Used for SOCK_SEQPACKET messages and SOCK_STREAM data.
+ * Used for SOCK_STREAM data.
*
- * Returns the number of bytes sent on success, or errno otherwise
+ * Returns the number of bytes sent on success (or partial success),
+ * or errno if no data sent
*/
-static int tipc_send_packet(struct kiocb *iocb, struct socket *sock,
- struct msghdr *m, size_t total_len)
+static int tipc_send_stream(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *m, size_t dsz)
{
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
+ struct tipc_port *port = &tsk->port;
+ struct tipc_msg *mhdr = &port->phdr;
+ struct sk_buff *buf;
DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
- int res = -EINVAL;
+ u32 ref = port->ref;
+ int rc = -EINVAL;
long timeo;
+ u32 dnode;
+ uint mtu, send, sent = 0;
/* Handle implied connection establishment */
- if (unlikely(dest))
- return tipc_sendmsg(iocb, sock, m, total_len);
-
- if (total_len > TIPC_MAX_USER_MSG_SIZE)
+ if (unlikely(dest)) {
+ rc = tipc_sendmsg(iocb, sock, m, dsz);
+ if (dsz && (dsz == rc))
+ tsk->sent_unacked = 1;
+ return rc;
+ }
+ if (dsz > (uint)INT_MAX)
return -EMSGSIZE;
if (iocb)
@@ -747,123 +866,66 @@ static int tipc_send_packet(struct kiocb *iocb, struct socket *sock,
if (unlikely(sock->state != SS_CONNECTED)) {
if (sock->state == SS_DISCONNECTING)
- res = -EPIPE;
+ rc = -EPIPE;
else
- res = -ENOTCONN;
+ rc = -ENOTCONN;
goto exit;
}
timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
+ dnode = tipc_port_peernode(port);
+
+next:
+ mtu = port->max_pkt;
+ send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE);
+ rc = tipc_msg_build2(mhdr, m->msg_iov, sent, send, mtu, &buf);
+ if (unlikely(rc < 0))
+ goto exit;
do {
- res = tipc_send(&tsk->port, m->msg_iov, total_len);
- if (likely(res != -ELINKCONG))
- break;
- res = tipc_wait_for_sndpkt(sock, &timeo);
- if (res)
- break;
- } while (1);
+ if (likely(!tipc_sk_conn_cong(tsk))) {
+ rc = tipc_link_xmit2(buf, dnode, ref);
+ if (likely(!rc)) {
+ tsk->sent_unacked++;
+ sent += send;
+ if (sent == dsz)
+ break;
+ goto next;
+ }
+ if (rc == -EMSGSIZE) {
+ port->max_pkt = tipc_node_get_mtu(dnode, ref);
+ goto next;
+ }
+ if (rc != -ELINKCONG)
+ break;
+ }
+ rc = tipc_wait_for_sndpkt(sock, &timeo);
+ if (rc)
+ kfree_skb_list(buf);
+ } while (!rc);
exit:
if (iocb)
release_sock(sk);
- return res;
+ return sent ? sent : rc;
}
/**
- * tipc_send_stream - send stream-oriented data
- * @iocb: (unused)
+ * tipc_send_packet - send a connection-oriented message
+ * @iocb: if NULL, indicates that socket lock is already held
* @sock: socket structure
- * @m: data to send
- * @total_len: total length of data to be sent
+ * @m: message to send
+ * @dsz: length of data to be transmitted
*
- * Used for SOCK_STREAM data.
+ * Used for SOCK_SEQPACKET messages.
*
- * Returns the number of bytes sent on success (or partial success),
- * or errno if no data sent
+ * Returns the number of bytes sent on success, or errno otherwise
*/
-static int tipc_send_stream(struct kiocb *iocb, struct socket *sock,
- struct msghdr *m, size_t total_len)
+static int tipc_send_packet(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *m, size_t dsz)
{
- struct sock *sk = sock->sk;
- struct tipc_sock *tsk = tipc_sk(sk);
- struct msghdr my_msg;
- struct iovec my_iov;
- struct iovec *curr_iov;
- int curr_iovlen;
- char __user *curr_start;
- u32 hdr_size;
- int curr_left;
- int bytes_to_send;
- int bytes_sent;
- int res;
-
- lock_sock(sk);
-
- /* Handle special cases where there is no connection */
- if (unlikely(sock->state != SS_CONNECTED)) {
- if (sock->state == SS_UNCONNECTED)
- res = tipc_send_packet(NULL, sock, m, total_len);
- else
- res = sock->state == SS_DISCONNECTING ? -EPIPE : -ENOTCONN;
- goto exit;
- }
-
- if (unlikely(m->msg_name)) {
- res = -EISCONN;
- goto exit;
- }
-
- if (total_len > (unsigned int)INT_MAX) {
- res = -EMSGSIZE;
- goto exit;
- }
-
- /*
- * Send each iovec entry using one or more messages
- *
- * Note: This algorithm is good for the most likely case
- * (i.e. one large iovec entry), but could be improved to pass sets
- * of small iovec entries into send_packet().
- */
- curr_iov = m->msg_iov;
- curr_iovlen = m->msg_iovlen;
- my_msg.msg_iov = &my_iov;
- my_msg.msg_iovlen = 1;
- my_msg.msg_flags = m->msg_flags;
- my_msg.msg_name = NULL;
- bytes_sent = 0;
-
- hdr_size = msg_hdr_sz(&tsk->port.phdr);
-
- while (curr_iovlen--) {
- curr_start = curr_iov->iov_base;
- curr_left = curr_iov->iov_len;
-
- while (curr_left) {
- bytes_to_send = tsk->port.max_pkt - hdr_size;
- if (bytes_to_send > TIPC_MAX_USER_MSG_SIZE)
- bytes_to_send = TIPC_MAX_USER_MSG_SIZE;
- if (curr_left < bytes_to_send)
- bytes_to_send = curr_left;
- my_iov.iov_base = curr_start;
- my_iov.iov_len = bytes_to_send;
- res = tipc_send_packet(NULL, sock, &my_msg,
- bytes_to_send);
- if (res < 0) {
- if (bytes_sent)
- res = bytes_sent;
- goto exit;
- }
- curr_left -= bytes_to_send;
- curr_start += bytes_to_send;
- bytes_sent += bytes_to_send;
- }
+ if (dsz > TIPC_MAX_USER_MSG_SIZE)
+ return -EMSGSIZE;
- curr_iov++;
- }
- res = bytes_sent;
-exit:
- release_sock(sk);
- return res;
+ return tipc_send_stream(iocb, sock, m, dsz);
}
/**
@@ -1104,8 +1166,10 @@ restart:
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
- (++port->conn_unacked >= TIPC_CONNACK_INTV))
- tipc_acknowledge(port->ref, port->conn_unacked);
+ (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) {
+ tipc_acknowledge(port->ref, tsk->rcv_unacked);
+ tsk->rcv_unacked = 0;
+ }
advance_rx_queue(sk);
}
exit:
@@ -1213,8 +1277,10 @@ restart:
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
- if (unlikely(++port->conn_unacked >= TIPC_CONNACK_INTV))
- tipc_acknowledge(port->ref, port->conn_unacked);
+ if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) {
+ tipc_acknowledge(port->ref, tsk->rcv_unacked);
+ tsk->rcv_unacked = 0;
+ }
advance_rx_queue(sk);
}
@@ -1269,17 +1335,16 @@ static void tipc_data_ready(struct sock *sk)
* @tsk: TIPC socket
* @msg: message
*
- * Returns TIPC error status code and socket error status code
- * once it encounters some errors
+ * Returns 0 (TIPC_OK) if everyting ok, -TIPC_ERR_NO_PORT otherwise
*/
-static u32 filter_connect(struct tipc_sock *tsk, struct sk_buff **buf)
+static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf)
{
struct sock *sk = &tsk->sk;
struct tipc_port *port = &tsk->port;
struct socket *sock = sk->sk_socket;
struct tipc_msg *msg = buf_msg(*buf);
- u32 retval = TIPC_ERR_NO_PORT;
+ int retval = -TIPC_ERR_NO_PORT;
int res;
if (msg_mcast(msg))
@@ -1382,32 +1447,37 @@ static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf)
*
* Called with socket lock already taken; port lock may also be taken.
*
- * Returns TIPC error status code (TIPC_OK if message is not to be rejected)
+ * Returns 0 (TIPC_OK) if message was consumed, -TIPC error code if message
+ * to be rejected, 1 (TIPC_FWD_MSG) if (CONN_MANAGER) message to be forwarded
*/
-static u32 filter_rcv(struct sock *sk, struct sk_buff *buf)
+static int filter_rcv(struct sock *sk, struct sk_buff *buf)
{
struct socket *sock = sk->sk_socket;
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_msg *msg = buf_msg(buf);
unsigned int limit = rcvbuf_limit(sk, buf);
- u32 res = TIPC_OK;
+ u32 onode;
+ int rc = TIPC_OK;
+
+ if (unlikely(msg_user(msg) == CONN_MANAGER))
+ return tipc_sk_proto_rcv(tsk, &onode, buf);
/* Reject message if it is wrong sort of message for socket */
if (msg_type(msg) > TIPC_DIRECT_MSG)
- return TIPC_ERR_NO_PORT;
+ return -TIPC_ERR_NO_PORT;
if (sock->state == SS_READY) {
if (msg_connected(msg))
- return TIPC_ERR_NO_PORT;
+ return -TIPC_ERR_NO_PORT;
} else {
- res = filter_connect(tsk, &buf);
- if (res != TIPC_OK || buf == NULL)
- return res;
+ rc = filter_connect(tsk, &buf);
+ if (rc != TIPC_OK || buf == NULL)
+ return rc;
}
/* Reject message if there isn't room to queue it */
if (sk_rmem_alloc_get(sk) + buf->truesize >= limit)
- return TIPC_ERR_OVERLOAD;
+ return -TIPC_ERR_OVERLOAD;
/* Enqueue message */
TIPC_SKB_CB(buf)->handle = NULL;
@@ -1429,16 +1499,23 @@ static u32 filter_rcv(struct sock *sk, struct sk_buff *buf)
*/
static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf)
{
- u32 res;
+ int rc;
+ u32 onode;
struct tipc_sock *tsk = tipc_sk(sk);
uint truesize = buf->truesize;
- res = filter_rcv(sk, buf);
- if (unlikely(res))
- tipc_reject_msg(buf, res);
+ rc = filter_rcv(sk, buf);
+
+ if (likely(!rc)) {
+ if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT)
+ atomic_add(truesize, &tsk->dupl_rcvcnt);
+ return 0;
+ }
+
+ if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc))
+ return 0;
- if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT)
- atomic_add(truesize, &tsk->dupl_rcvcnt);
+ tipc_link_xmit2(buf, onode, 0);
return 0;
}
@@ -1455,19 +1532,14 @@ int tipc_sk_rcv(struct sk_buff *buf)
struct tipc_port *port;
struct sock *sk;
u32 dport = msg_destport(buf_msg(buf));
- int err = TIPC_OK;
+ int rc = TIPC_OK;
uint limit;
+ u32 dnode;
- /* Forward unresolved named message */
- if (unlikely(!dport)) {
- tipc_net_route_msg(buf);
- return 0;
- }
-
- /* Validate destination */
+ /* Validate destination and message */
port = tipc_port_lock(dport);
if (unlikely(!port)) {
- err = TIPC_ERR_NO_PORT;
+ rc = tipc_msg_eval(buf, &dnode);
goto exit;
}
@@ -1478,23 +1550,25 @@ int tipc_sk_rcv(struct sk_buff *buf)
bh_lock_sock(sk);
if (!sock_owned_by_user(sk)) {
- err = filter_rcv(sk, buf);
+ rc = filter_rcv(sk, buf);
} 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))
- err = TIPC_ERR_OVERLOAD;
+ rc = -TIPC_ERR_OVERLOAD;
}
-
bh_unlock_sock(sk);
tipc_port_unlock(port);
- if (likely(!err))
+ if (likely(!rc))
return 0;
exit:
- tipc_reject_msg(buf, err);
- return -EHOSTUNREACH;
+ if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc))
+ return -EHOSTUNREACH;
+
+ tipc_link_xmit2(buf, dnode, 0);
+ return (rc < 0) ? -EHOSTUNREACH : 0;
}
static int tipc_wait_for_connect(struct socket *sock, long *timeo_p)
@@ -1758,6 +1832,7 @@ static int tipc_shutdown(struct socket *sock, int how)
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_port *port = &tsk->port;
struct sk_buff *buf;
+ u32 peer;
int res;
if (how != SHUT_RDWR)
@@ -1778,7 +1853,8 @@ restart:
goto restart;
}
tipc_port_disconnect(port->ref);
- tipc_reject_msg(buf, TIPC_CONN_SHUTDOWN);
+ if (tipc_msg_reverse(buf, &peer, TIPC_CONN_SHUTDOWN))
+ tipc_link_xmit2(buf, peer, 0);
} else {
tipc_port_shutdown(port->ref);
}
@@ -1952,7 +2028,6 @@ int tipc_ioctl(struct socket *sk, unsigned int cmd, unsigned long arg)
return 0;
}
return -EADDRNOTAVAIL;
- break;
default:
return -ENOIOCTLCMD;
}
diff --git a/net/tipc/socket.h b/net/tipc/socket.h
index 3afcd2a70b31..2cdede9eda1b 100644
--- a/net/tipc/socket.h
+++ b/net/tipc/socket.h
@@ -38,6 +38,9 @@
#include "port.h"
#include <net/sock.h>
+#define TIPC_CONN_OK 0
+#define TIPC_CONN_PROBING 1
+
/**
* struct tipc_sock - TIPC socket structure
* @sk: socket - interacts with 'port' and with user via the socket API
@@ -45,6 +48,9 @@
* @peer_name: the peer of the connection, if any
* @conn_timeout: the time we can wait for an unresponded setup request
* @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue
+ * @link_cong: non-zero if owner must sleep because of link congestion
+ * @sent_unacked: # messages sent by socket, and not yet acked by peer
+ * @rcv_unacked: # messages read by user, but not yet acked back to peer
*/
struct tipc_sock {
@@ -52,6 +58,9 @@ struct tipc_sock {
struct tipc_port port;
unsigned int conn_timeout;
atomic_t dupl_rcvcnt;
+ int link_cong;
+ uint sent_unacked;
+ uint rcv_unacked;
};
static inline struct tipc_sock *tipc_sk(const struct sock *sk)
@@ -69,6 +78,11 @@ static inline void tipc_sock_wakeup(struct tipc_sock *tsk)
tsk->sk.sk_write_space(&tsk->sk);
}
+static inline int tipc_sk_conn_cong(struct tipc_sock *tsk)
+{
+ return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN;
+}
+
int tipc_sk_rcv(struct sk_buff *buf);
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-14 11:20:44 +0000