diff options
Diffstat (limited to 'net/tipc/bearer.c')
-rw-r--r-- | net/tipc/bearer.c | 96 |
1 files changed, 51 insertions, 45 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 574b861..3fef7eb 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -49,9 +49,9 @@ static struct tipc_media * const media_info_array[] = { NULL }; -struct tipc_bearer tipc_bearers[MAX_BEARERS]; +struct tipc_bearer *bearer_list[MAX_BEARERS + 1]; -static void bearer_disable(struct tipc_bearer *b_ptr); +static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down); /** * tipc_media_find - locates specified media object by name @@ -177,8 +177,9 @@ struct tipc_bearer *tipc_bearer_find(const char *name) struct tipc_bearer *b_ptr; u32 i; - for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) { - if (b_ptr->active && (!strcmp(b_ptr->name, name))) + for (i = 0; i < MAX_BEARERS; i++) { + b_ptr = bearer_list[i]; + if (b_ptr && (!strcmp(b_ptr->name, name))) return b_ptr; } return NULL; @@ -200,8 +201,10 @@ struct sk_buff *tipc_bearer_get_names(void) read_lock_bh(&tipc_net_lock); for (i = 0; media_info_array[i] != NULL; i++) { for (j = 0; j < MAX_BEARERS; j++) { - b = &tipc_bearers[j]; - if (b->active && (b->media == media_info_array[i])) { + b = bearer_list[j]; + if (!b) + continue; + if (b->media == media_info_array[i]) { tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME, b->name, strlen(b->name) + 1); @@ -284,16 +287,17 @@ restart: bearer_id = MAX_BEARERS; with_this_prio = 1; for (i = MAX_BEARERS; i-- != 0; ) { - if (!tipc_bearers[i].active) { + b_ptr = bearer_list[i]; + if (!b_ptr) { bearer_id = i; continue; } - if (!strcmp(name, tipc_bearers[i].name)) { + if (!strcmp(name, b_ptr->name)) { pr_warn("Bearer <%s> rejected, already enabled\n", name); goto exit; } - if ((tipc_bearers[i].priority == priority) && + if ((b_ptr->priority == priority) && (++with_this_prio > 2)) { if (priority-- == 0) { pr_warn("Bearer <%s> rejected, duplicate priority\n", @@ -311,7 +315,11 @@ restart: goto exit; } - b_ptr = &tipc_bearers[bearer_id]; + b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC); + if (!b_ptr) { + res = -ENOMEM; + goto exit; + } strcpy(b_ptr->name, name); b_ptr->media = m_ptr; res = m_ptr->enable_media(b_ptr); @@ -324,19 +332,20 @@ restart: b_ptr->identity = bearer_id; b_ptr->tolerance = m_ptr->tolerance; b_ptr->window = m_ptr->window; + b_ptr->domain = disc_domain; b_ptr->net_plane = bearer_id + 'A'; - b_ptr->active = 1; b_ptr->priority = priority; - INIT_LIST_HEAD(&b_ptr->links); - spin_lock_init(&b_ptr->lock); - res = tipc_disc_create(b_ptr, &b_ptr->bcast_addr, disc_domain); + res = tipc_disc_create(b_ptr, &b_ptr->bcast_addr); if (res) { - bearer_disable(b_ptr); + bearer_disable(b_ptr, false); pr_warn("Bearer <%s> rejected, discovery object creation failed\n", name); goto exit; } + + bearer_list[bearer_id] = b_ptr; + pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", name, tipc_addr_string_fill(addr_string, disc_domain), priority); @@ -350,20 +359,11 @@ exit: */ static int tipc_reset_bearer(struct tipc_bearer *b_ptr) { - struct tipc_link *l_ptr; - struct tipc_link *temp_l_ptr; - read_lock_bh(&tipc_net_lock); pr_info("Resetting bearer <%s>\n", b_ptr->name); - spin_lock_bh(&b_ptr->lock); - list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { - struct tipc_node *n_ptr = l_ptr->owner; - - spin_lock_bh(&n_ptr->lock); - tipc_link_reset(l_ptr); - spin_unlock_bh(&n_ptr->lock); - } - spin_unlock_bh(&b_ptr->lock); + tipc_disc_delete(b_ptr->link_req); + tipc_link_reset_list(b_ptr->identity); + tipc_disc_create(b_ptr, &b_ptr->bcast_addr); read_unlock_bh(&tipc_net_lock); return 0; } @@ -373,26 +373,24 @@ static int tipc_reset_bearer(struct tipc_bearer *b_ptr) * * Note: This routine assumes caller holds tipc_net_lock. */ -static void bearer_disable(struct tipc_bearer *b_ptr) +static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down) { - struct tipc_link *l_ptr; - struct tipc_link *temp_l_ptr; - struct tipc_link_req *temp_req; + u32 i; pr_info("Disabling bearer <%s>\n", b_ptr->name); - spin_lock_bh(&b_ptr->lock); b_ptr->media->disable_media(b_ptr); - list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { - tipc_link_delete(l_ptr); - } - temp_req = b_ptr->link_req; - b_ptr->link_req = NULL; - spin_unlock_bh(&b_ptr->lock); - if (temp_req) - tipc_disc_delete(temp_req); + tipc_link_delete_list(b_ptr->identity, shutting_down); + if (b_ptr->link_req) + tipc_disc_delete(b_ptr->link_req); - memset(b_ptr, 0, sizeof(struct tipc_bearer)); + for (i = 0; i < MAX_BEARERS; i++) { + if (b_ptr == bearer_list[i]) { + bearer_list[i] = NULL; + break; + } + } + kfree(b_ptr); } int tipc_disable_bearer(const char *name) @@ -406,7 +404,7 @@ int tipc_disable_bearer(const char *name) pr_warn("Attempt to disable unknown bearer <%s>\n", name); res = -EINVAL; } else { - bearer_disable(b_ptr); + bearer_disable(b_ptr, false); res = 0; } write_unlock_bh(&tipc_net_lock); @@ -585,7 +583,11 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, break; case NETDEV_DOWN: case NETDEV_CHANGEMTU: + tipc_reset_bearer(b_ptr); + break; case NETDEV_CHANGEADDR: + tipc_l2_media_addr_set(b_ptr, &b_ptr->addr, + (char *)dev->dev_addr); tipc_reset_bearer(b_ptr); break; case NETDEV_UNREGISTER: @@ -599,7 +601,7 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, } static struct packet_type tipc_packet_type __read_mostly = { - .type = __constant_htons(ETH_P_TIPC), + .type = htons(ETH_P_TIPC), .func = tipc_l2_rcv_msg, }; @@ -627,10 +629,14 @@ void tipc_bearer_cleanup(void) void tipc_bearer_stop(void) { + struct tipc_bearer *b_ptr; u32 i; for (i = 0; i < MAX_BEARERS; i++) { - if (tipc_bearers[i].active) - bearer_disable(&tipc_bearers[i]); + b_ptr = bearer_list[i]; + if (b_ptr) { + bearer_disable(b_ptr, true); + bearer_list[i] = NULL; + } } } |