diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/tipc/bcast.c | 21 | ||||
| -rw-r--r-- | net/tipc/bearer.c | 110 | ||||
| -rw-r--r-- | net/tipc/bearer.h | 24 | ||||
| -rw-r--r-- | net/tipc/discover.c | 2 | ||||
| -rw-r--r-- | net/tipc/link.c | 117 | ||||
| -rw-r--r-- | net/tipc/link.h | 4 |
6 files changed, 61 insertions, 217 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index e4e6d8cd47e6..40da098eeb39 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -619,16 +619,14 @@ static int tipc_bcbearer_send(struct sk_buff *buf, if (bcbearer->remains_new.count == bcbearer->remains.count) continue; /* bearer pair doesn't add anything */ - if (p->blocked || - p->media->send_msg(buf, p, &p->media->bcast_addr)) { + if (!tipc_bearer_blocked(p)) + tipc_bearer_send(p, buf, &p->media->bcast_addr); + else if (s && !tipc_bearer_blocked(s)) /* unable to send on primary bearer */ - if (!s || s->blocked || - s->media->send_msg(buf, s, - &s->media->bcast_addr)) { - /* unable to send on either bearer */ - continue; - } - } + tipc_bearer_send(s, buf, &s->media->bcast_addr); + else + /* unable to send on either bearer */ + continue; if (s) { bcbearer->bpairs[bp_index].primary = s; @@ -731,8 +729,8 @@ int tipc_bclink_stats(char *buf, const u32 buf_size) " TX naks:%u acks:%u dups:%u\n", s->sent_nacks, s->sent_acks, s->retransmitted); ret += tipc_snprintf(buf + ret, buf_size - ret, - " Congestion bearer:%u link:%u Send queue max:%u avg:%u\n", - s->bearer_congs, s->link_congs, s->max_queue_sz, + " Congestion link:%u Send queue max:%u avg:%u\n", + s->link_congs, s->max_queue_sz, s->queue_sz_counts ? (s->accu_queue_sz / s->queue_sz_counts) : 0); @@ -766,7 +764,6 @@ int tipc_bclink_set_queue_limits(u32 limit) void tipc_bclink_init(void) { - INIT_LIST_HEAD(&bcbearer->bearer.cong_links); bcbearer->bearer.media = &bcbearer->media; bcbearer->media.send_msg = tipc_bcbearer_send; sprintf(bcbearer->media.name, "tipc-broadcast"); diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 4ec5c80e8a7c..aa62f93a9127 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -279,116 +279,31 @@ void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest) } /* - * bearer_push(): Resolve bearer congestion. Force the waiting - * links to push out their unsent packets, one packet per link - * per iteration, until all packets are gone or congestion reoccurs. - * 'tipc_net_lock' is read_locked when this function is called - * bearer.lock must be taken before calling - * Returns binary true(1) ore false(0) - */ -static int bearer_push(struct tipc_bearer *b_ptr) -{ - u32 res = 0; - struct tipc_link *ln, *tln; - - if (b_ptr->blocked) - return 0; - - while (!list_empty(&b_ptr->cong_links) && (res != PUSH_FAILED)) { - list_for_each_entry_safe(ln, tln, &b_ptr->cong_links, link_list) { - res = tipc_link_push_packet(ln); - if (res == PUSH_FAILED) - break; - if (res == PUSH_FINISHED) - list_move_tail(&ln->link_list, &b_ptr->links); - } - } - return list_empty(&b_ptr->cong_links); -} - -void tipc_bearer_lock_push(struct tipc_bearer *b_ptr) -{ - spin_lock_bh(&b_ptr->lock); - bearer_push(b_ptr); - spin_unlock_bh(&b_ptr->lock); -} - - -/* - * Interrupt enabling new requests after bearer congestion or blocking: + * Interrupt enabling new requests after bearer blocking: * See bearer_send(). */ -void tipc_continue(struct tipc_bearer *b_ptr) +void tipc_continue(struct tipc_bearer *b) { - spin_lock_bh(&b_ptr->lock); - if (!list_empty(&b_ptr->cong_links)) - tipc_k_signal((Handler)tipc_bearer_lock_push, (unsigned long)b_ptr); - b_ptr->blocked = 0; - spin_unlock_bh(&b_ptr->lock); + spin_lock_bh(&b->lock); + b->blocked = 0; + spin_unlock_bh(&b->lock); } /* - * Schedule link for sending of messages after the bearer - * has been deblocked by 'continue()'. This method is called - * when somebody tries to send a message via this link while - * the bearer is congested. 'tipc_net_lock' is in read_lock here - * bearer.lock is busy + * tipc_bearer_blocked - determines if bearer is currently blocked */ -static void tipc_bearer_schedule_unlocked(struct tipc_bearer *b_ptr, - struct tipc_link *l_ptr) +int tipc_bearer_blocked(struct tipc_bearer *b) { - list_move_tail(&l_ptr->link_list, &b_ptr->cong_links); -} - -/* - * Schedule link for sending of messages after the bearer - * has been deblocked by 'continue()'. This method is called - * when somebody tries to send a message via this link while - * the bearer is congested. 'tipc_net_lock' is in read_lock here, - * bearer.lock is free - */ -void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr) -{ - spin_lock_bh(&b_ptr->lock); - tipc_bearer_schedule_unlocked(b_ptr, l_ptr); - spin_unlock_bh(&b_ptr->lock); -} - + int res; -/* - * tipc_bearer_resolve_congestion(): Check if there is bearer congestion, - * and if there is, try to resolve it before returning. - * 'tipc_net_lock' is read_locked when this function is called - */ -int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr, - struct tipc_link *l_ptr) -{ - int res = 1; + spin_lock_bh(&b->lock); + res = b->blocked; + spin_unlock_bh(&b->lock); - if (list_empty(&b_ptr->cong_links)) - return 1; - spin_lock_bh(&b_ptr->lock); - if (!bearer_push(b_ptr)) { - tipc_bearer_schedule_unlocked(b_ptr, l_ptr); - res = 0; - } - spin_unlock_bh(&b_ptr->lock); return res; } /** - * tipc_bearer_congested - determines if bearer is currently congested - */ -int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr) -{ - if (unlikely(b_ptr->blocked)) - return 1; - if (likely(list_empty(&b_ptr->cong_links))) - return 0; - return !tipc_bearer_resolve_congestion(b_ptr, l_ptr); -} - -/** * tipc_enable_bearer - enable bearer with the given name */ int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority) @@ -489,7 +404,6 @@ restart: b_ptr->net_plane = bearer_id + 'A'; b_ptr->active = 1; b_ptr->priority = priority; - INIT_LIST_HEAD(&b_ptr->cong_links); INIT_LIST_HEAD(&b_ptr->links); spin_lock_init(&b_ptr->lock); @@ -528,7 +442,6 @@ int tipc_block_bearer(const char *name) pr_info("Blocking bearer <%s>\n", name); spin_lock_bh(&b_ptr->lock); b_ptr->blocked = 1; - list_splice_init(&b_ptr->cong_links, &b_ptr->links); list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { struct tipc_node *n_ptr = l_ptr->owner; @@ -555,7 +468,6 @@ static void bearer_disable(struct tipc_bearer *b_ptr) spin_lock_bh(&b_ptr->lock); b_ptr->blocked = 1; b_ptr->media->disable_bearer(b_ptr); - list_splice_init(&b_ptr->cong_links, &b_ptr->links); list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { tipc_link_delete(l_ptr); } diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index dd4c2abf08e7..39f1192d04bf 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -120,7 +120,6 @@ struct tipc_media { * @identity: array index of this bearer within TIPC bearer array * @link_req: ptr to (optional) structure making periodic link setup requests * @links: list of non-congested links associated with bearer - * @cong_links: list of congested links associated with bearer * @active: non-zero if bearer structure is represents a bearer * @net_plane: network plane ('A' through 'H') currently associated with bearer * @nodes: indicates which nodes in cluster can be reached through bearer @@ -143,7 +142,6 @@ struct tipc_bearer { u32 identity; struct tipc_link_req *link_req; struct list_head links; - struct list_head cong_links; int active; char net_plane; struct tipc_node_map nodes; @@ -185,39 +183,23 @@ struct sk_buff *tipc_media_get_names(void); struct sk_buff *tipc_bearer_get_names(void); void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest); void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest); -void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr); struct tipc_bearer *tipc_bearer_find(const char *name); struct tipc_bearer *tipc_bearer_find_interface(const char *if_name); struct tipc_media *tipc_media_find(const char *name); -int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr, - struct tipc_link *l_ptr); -int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr); +int tipc_bearer_blocked(struct tipc_bearer *b_ptr); void tipc_bearer_stop(void); -void tipc_bearer_lock_push(struct tipc_bearer *b_ptr); - /** * tipc_bearer_send- sends buffer to destination over bearer * - * Returns true (1) if successful, or false (0) if unable to send - * * IMPORTANT: * The media send routine must not alter the buffer being passed in * as it may be needed for later retransmission! - * - * If the media send routine returns a non-zero value (indicating that - * it was unable to send the buffer), it must: - * 1) mark the bearer as blocked, - * 2) call tipc_continue() once the bearer is able to send again. - * Media types that are unable to meet these two critera must ensure their - * send routine always returns success -- even if the buffer was not sent -- - * and let TIPC's link code deal with the undelivered message. */ -static inline int tipc_bearer_send(struct tipc_bearer *b_ptr, - struct sk_buff *buf, +static inline void tipc_bearer_send(struct tipc_bearer *b, struct sk_buff *buf, struct tipc_media_addr *dest) { - return !b_ptr->media->send_msg(buf, b_ptr, dest); + b->media->send_msg(buf, b, dest); } #endif /* _TIPC_BEARER_H */ diff --git a/net/tipc/discover.c b/net/tipc/discover.c index 50eaa403eb6e..1074b9587e81 100644 --- a/net/tipc/discover.c +++ b/net/tipc/discover.c @@ -243,7 +243,7 @@ void tipc_disc_recv_msg(struct sk_buff *buf, struct tipc_bearer *b_ptr) if ((type == DSC_REQ_MSG) && !link_fully_up && !b_ptr->blocked) { rbuf = tipc_disc_init_msg(DSC_RESP_MSG, orig, b_ptr); if (rbuf) { - b_ptr->media->send_msg(rbuf, b_ptr, &media_addr); + tipc_bearer_send(b_ptr, rbuf, &media_addr); kfree_skb(rbuf); } } diff --git a/net/tipc/link.c b/net/tipc/link.c index a79c755cb417..0cc64800ab93 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -872,17 +872,12 @@ int tipc_link_send_buf(struct tipc_link *l_ptr, struct sk_buff *buf) return link_send_long_buf(l_ptr, buf); /* Packet can be queued or sent. */ - if (likely(!tipc_bearer_congested(l_ptr->b_ptr, l_ptr) && + if (likely(!tipc_bearer_blocked(l_ptr->b_ptr) && !link_congested(l_ptr))) { link_add_to_outqueue(l_ptr, buf, msg); - if (likely(tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr))) { - l_ptr->unacked_window = 0; - } else { - tipc_bearer_schedule(l_ptr->b_ptr, l_ptr); - l_ptr->stats.bearer_congs++; - l_ptr->next_out = buf; - } + tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr); + l_ptr->unacked_window = 0; return dsz; } /* Congestion: can message be bundled ? */ @@ -891,10 +886,8 @@ int tipc_link_send_buf(struct tipc_link *l_ptr, struct sk_buff *buf) /* Try adding message to an existing bundle */ if (l_ptr->next_out && - link_bundle_buf(l_ptr, l_ptr->last_out, buf)) { - tipc_bearer_resolve_congestion(l_ptr->b_ptr, l_ptr); + link_bundle_buf(l_ptr, l_ptr->last_out, buf)) return dsz; - } /* Try creating a new bundle */ if (size <= max_packet * 2 / 3) { @@ -917,7 +910,6 @@ int tipc_link_send_buf(struct tipc_link *l_ptr, struct sk_buff *buf) if (!l_ptr->next_out) l_ptr->next_out = buf; link_add_to_outqueue(l_ptr, buf, msg); - tipc_bearer_resolve_congestion(l_ptr->b_ptr, l_ptr); return dsz; } @@ -1006,16 +998,11 @@ static int link_send_buf_fast(struct tipc_link *l_ptr, struct sk_buff *buf, if (likely(!link_congested(l_ptr))) { if (likely(msg_size(msg) <= l_ptr->max_pkt)) { - if (likely(list_empty(&l_ptr->b_ptr->cong_links))) { + if (likely(!tipc_bearer_blocked(l_ptr->b_ptr))) { link_add_to_outqueue(l_ptr, buf, msg); - if (likely(tipc_bearer_send(l_ptr->b_ptr, buf, - &l_ptr->media_addr))) { - l_ptr->unacked_window = 0; - return res; - } - tipc_bearer_schedule(l_ptr->b_ptr, l_ptr); - l_ptr->stats.bearer_congs++; - l_ptr->next_out = buf; + tipc_bearer_send(l_ptr->b_ptr, buf, + &l_ptr->media_addr); + l_ptr->unacked_window = 0; return res; } } else @@ -1106,7 +1093,7 @@ exit: /* Exit if link (or bearer) is congested */ if (link_congested(l_ptr) || - !list_empty(&l_ptr->b_ptr->cong_links)) { + tipc_bearer_blocked(l_ptr->b_ptr)) { res = link_schedule_port(l_ptr, sender->ref, res); goto exit; @@ -1329,15 +1316,11 @@ u32 tipc_link_push_packet(struct tipc_link *l_ptr) if (r_q_size && buf) { msg_set_ack(buf_msg(buf), mod(l_ptr->next_in_no - 1)); msg_set_bcast_ack(buf_msg(buf), l_ptr->owner->bclink.last_in); - if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) { - l_ptr->retransm_queue_head = mod(++r_q_head); - l_ptr->retransm_queue_size = --r_q_size; - l_ptr->stats.retransmitted++; - return 0; - } else { - l_ptr->stats.bearer_congs++; - return PUSH_FAILED; - } + tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr); + l_ptr->retransm_queue_head = mod(++r_q_head); + l_ptr->retransm_queue_size = --r_q_size; + l_ptr->stats.retransmitted++; + return 0; } /* Send deferred protocol message, if any: */ @@ -1345,15 +1328,11 @@ u32 tipc_link_push_packet(struct tipc_link *l_ptr) if (buf) { msg_set_ack(buf_msg(buf), mod(l_ptr->next_in_no - 1)); msg_set_bcast_ack(buf_msg(buf), l_ptr->owner->bclink.last_in); - if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) { - l_ptr->unacked_window = 0; - kfree_skb(buf); - l_ptr->proto_msg_queue = NULL; - return 0; - } else { - l_ptr->stats.bearer_congs++; - return PUSH_FAILED; - } + tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr); + l_ptr->unacked_window = 0; + kfree_skb(buf); + l_ptr->proto_msg_queue = NULL; + return 0; } /* Send one deferred data message, if send window not full: */ @@ -1366,18 +1345,14 @@ u32 tipc_link_push_packet(struct tipc_link *l_ptr) if (mod(next - first) < l_ptr->queue_limit[0]) { msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); - if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) { - if (msg_user(msg) == MSG_BUNDLER) - msg_set_type(msg, CLOSED_MSG); - l_ptr->next_out = buf->next; - return 0; - } else { - l_ptr->stats.bearer_congs++; - return PUSH_FAILED; - } + tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr); + if (msg_user(msg) == MSG_BUNDLER) + msg_set_type(msg, CLOSED_MSG); + l_ptr->next_out = buf->next; + return 0; } } - return PUSH_FINISHED; + return 1; } /* @@ -1388,15 +1363,12 @@ void tipc_link_push_queue(struct tipc_link *l_ptr) { u32 res; - if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) + if (tipc_bearer_blocked(l_ptr->b_ptr)) return; do { res = tipc_link_push_packet(l_ptr); } while (!res); - - if (res == PUSH_FAILED) - tipc_bearer_schedule(l_ptr->b_ptr, l_ptr); } static void link_reset_all(unsigned long addr) @@ -1481,7 +1453,7 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *buf, msg = buf_msg(buf); - if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) { + if (tipc_bearer_blocked(l_ptr->b_ptr)) { if (l_ptr->retransm_queue_size == 0) { l_ptr->retransm_queue_head = msg_seqno(msg); l_ptr->retransm_queue_size = retransmits; @@ -1491,7 +1463,7 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *buf, } return; } else { - /* Detect repeated retransmit failures on uncongested bearer */ + /* Detect repeated retransmit failures on unblocked bearer */ if (l_ptr->last_retransmitted == msg_seqno(msg)) { if (++l_ptr->stale_count > 100) { link_retransmit_failure(l_ptr, buf); @@ -1507,17 +1479,10 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *buf, msg = buf_msg(buf); msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); - if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) { - buf = buf->next; - retransmits--; - l_ptr->stats.retransmitted++; - } else { - tipc_bearer_schedule(l_ptr->b_ptr, l_ptr); - l_ptr->stats.bearer_congs++; - l_ptr->retransm_queue_head = buf_seqno(buf); - l_ptr->retransm_queue_size = retransmits; - return; - } + tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr); + buf = buf->next; + retransmits--; + l_ptr->stats.retransmitted++; } l_ptr->retransm_queue_head = l_ptr->retransm_queue_size = 0; @@ -1972,21 +1937,13 @@ void tipc_link_send_proto_msg(struct tipc_link *l_ptr, u32 msg_typ, skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg)); - /* Defer message if bearer is already congested */ - if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) { - l_ptr->proto_msg_queue = buf; - return; - } - - /* Defer message if attempting to send results in bearer congestion */ - if (!tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) { - tipc_bearer_schedule(l_ptr->b_ptr, l_ptr); + /* Defer message if bearer is already blocked */ + if (tipc_bearer_blocked(l_ptr->b_ptr)) { l_ptr->proto_msg_queue = buf; - l_ptr->stats.bearer_congs++; return; } - /* Discard message if it was sent successfully */ + tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr); l_ptr->unacked_window = 0; kfree_skb(buf); } @@ -2937,8 +2894,8 @@ static int tipc_link_stats(const char *name, char *buf, const u32 buf_size) s->sent_nacks, s->sent_acks, s->retransmitted); ret += tipc_snprintf(buf + ret, buf_size - ret, - " Congestion bearer:%u link:%u Send queue" - " max:%u avg:%u\n", s->bearer_congs, s->link_congs, + " Congestion link:%u Send queue" + " max:%u avg:%u\n", s->link_congs, s->max_queue_sz, s->queue_sz_counts ? (s->accu_queue_sz / s->queue_sz_counts) : 0); diff --git a/net/tipc/link.h b/net/tipc/link.h index 6e921121be06..c048ed1cbd76 100644 --- a/net/tipc/link.h +++ b/net/tipc/link.h @@ -40,9 +40,6 @@ #include "msg.h" #include "node.h" -#define PUSH_FAILED 1 -#define PUSH_FINISHED 2 - /* * Out-of-range value for link sequence numbers */ @@ -82,7 +79,6 @@ struct tipc_stats { u32 recv_fragmented; u32 recv_fragments; u32 link_congs; /* # port sends blocked by congestion */ - u32 bearer_congs; u32 deferred_recv; u32 duplicates; u32 max_queue_sz; /* send queue size high water mark */ |