diff options
Diffstat (limited to 'net/tipc')
| -rw-r--r-- | net/tipc/bcast.c | 21 | ||||
| -rw-r--r-- | net/tipc/bcast.h | 1 | ||||
| -rw-r--r-- | net/tipc/bearer.c | 2 | ||||
| -rw-r--r-- | net/tipc/core.c | 4 | ||||
| -rw-r--r-- | net/tipc/link.c | 66 | ||||
| -rw-r--r-- | net/tipc/name_table.c | 34 | ||||
| -rw-r--r-- | net/tipc/netlink_compat.c | 137 | ||||
| -rw-r--r-- | net/tipc/server.c | 4 | ||||
| -rw-r--r-- | net/tipc/socket.c | 2 | ||||
| -rw-r--r-- | net/tipc/subscr.c | 242 | ||||
| -rw-r--r-- | net/tipc/subscr.h | 18 |
11 files changed, 311 insertions, 220 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index c5cbdcb1f0b5..3e18fc6c7877 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -866,6 +866,27 @@ int tipc_bclink_set_queue_limits(struct net *net, u32 limit) return 0; } +int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) +{ + int err; + u32 win; + struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; + + if (!attrs[TIPC_NLA_LINK_PROP]) + return -EINVAL; + + err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); + if (err) + return err; + + if (!props[TIPC_NLA_PROP_WIN]) + return -EOPNOTSUPP; + + win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); + + return tipc_bclink_set_queue_limits(net, win); +} + int tipc_bclink_init(struct net *net) { struct tipc_net *tn = net_generic(net, tipc_net_id); diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h index 4bdc12277d33..3c290a48f720 100644 --- a/net/tipc/bcast.h +++ b/net/tipc/bcast.h @@ -131,6 +131,7 @@ uint tipc_bclink_get_mtu(void); int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list); void tipc_bclink_wakeup_users(struct net *net); int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg); +int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]); void tipc_bclink_input(struct net *net); #endif diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 70e3dacbf84a..99c0bd43feed 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -812,7 +812,7 @@ int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) char *name; struct tipc_bearer *b; struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; - struct net *net = genl_info_net(info); + struct net *net = sock_net(skb->sk); if (!info->attrs[TIPC_NLA_BEARER]) return -EINVAL; diff --git a/net/tipc/core.c b/net/tipc/core.c index be1c9fa60b09..005ba5eb0ea4 100644 --- a/net/tipc/core.c +++ b/net/tipc/core.c @@ -68,7 +68,7 @@ static int __net_init tipc_init_net(struct net *net) if (err) goto out_nametbl; - err = tipc_subscr_start(net); + err = tipc_topsrv_start(net); if (err) goto out_subscr; return 0; @@ -83,7 +83,7 @@ out_sk_rht: static void __net_exit tipc_exit_net(struct net *net) { - tipc_subscr_stop(net); + tipc_topsrv_stop(net); tipc_net_stop(net); tipc_nametbl_stop(net); tipc_sk_rht_destroy(net); diff --git a/net/tipc/link.c b/net/tipc/link.c index 43a515dc97b0..374d52335168 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1893,6 +1893,9 @@ int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info) name = nla_data(attrs[TIPC_NLA_LINK_NAME]); + if (strcmp(name, tipc_bclink_name) == 0) + return tipc_nl_bc_link_set(net, attrs); + node = tipc_link_find_owner(net, name, &bearer_id); if (!node) return -EINVAL; @@ -2175,50 +2178,53 @@ out: int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info) { struct net *net = genl_info_net(info); - struct sk_buff *ans_skb; struct tipc_nl_msg msg; - struct tipc_link *link; - struct tipc_node *node; char *name; - int bearer_id; int err; + msg.portid = info->snd_portid; + msg.seq = info->snd_seq; + if (!info->attrs[TIPC_NLA_LINK_NAME]) return -EINVAL; - name = nla_data(info->attrs[TIPC_NLA_LINK_NAME]); - node = tipc_link_find_owner(net, name, &bearer_id); - if (!node) - return -EINVAL; - ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); - if (!ans_skb) + msg.skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!msg.skb) return -ENOMEM; - msg.skb = ans_skb; - msg.portid = info->snd_portid; - msg.seq = info->snd_seq; - - tipc_node_lock(node); - link = node->links[bearer_id]; - if (!link) { - err = -EINVAL; - goto err_out; - } - - err = __tipc_nl_add_link(net, &msg, link, 0); - if (err) - goto err_out; + if (strcmp(name, tipc_bclink_name) == 0) { + err = tipc_nl_add_bc_link(net, &msg); + if (err) { + nlmsg_free(msg.skb); + return err; + } + } else { + int bearer_id; + struct tipc_node *node; + struct tipc_link *link; - tipc_node_unlock(node); + node = tipc_link_find_owner(net, name, &bearer_id); + if (!node) + return -EINVAL; - return genlmsg_reply(ans_skb, info); + tipc_node_lock(node); + link = node->links[bearer_id]; + if (!link) { + tipc_node_unlock(node); + nlmsg_free(msg.skb); + return -EINVAL; + } -err_out: - tipc_node_unlock(node); - nlmsg_free(ans_skb); + err = __tipc_nl_add_link(net, &msg, link, 0); + tipc_node_unlock(node); + if (err) { + nlmsg_free(msg.skb); + return err; + } + } - return err; + return genlmsg_reply(msg.skb, info); } int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info) diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c index ab0ac62a1287..0f47f08bf38f 100644 --- a/net/tipc/name_table.c +++ b/net/tipc/name_table.c @@ -330,13 +330,9 @@ static struct publication *tipc_nameseq_insert_publ(struct net *net, /* Any subscriptions waiting for notification? */ list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) { - tipc_subscr_report_overlap(s, - publ->lower, - publ->upper, - TIPC_PUBLISHED, - publ->ref, - publ->node, - created_subseq); + tipc_subscrp_report_overlap(s, publ->lower, publ->upper, + TIPC_PUBLISHED, publ->ref, + publ->node, created_subseq); } return publ; } @@ -404,13 +400,9 @@ found: /* Notify any waiting subscriptions */ list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) { - tipc_subscr_report_overlap(s, - publ->lower, - publ->upper, - TIPC_WITHDRAWN, - publ->ref, - publ->node, - removed_subseq); + tipc_subscrp_report_overlap(s, publ->lower, publ->upper, + TIPC_WITHDRAWN, publ->ref, + publ->node, removed_subseq); } return publ; @@ -432,19 +424,17 @@ static void tipc_nameseq_subscribe(struct name_seq *nseq, return; while (sseq != &nseq->sseqs[nseq->first_free]) { - if (tipc_subscr_overlap(s, sseq->lower, sseq->upper)) { + if (tipc_subscrp_check_overlap(s, sseq->lower, sseq->upper)) { struct publication *crs; struct name_info *info = sseq->info; int must_report = 1; list_for_each_entry(crs, &info->zone_list, zone_list) { - tipc_subscr_report_overlap(s, - sseq->lower, - sseq->upper, - TIPC_PUBLISHED, - crs->ref, - crs->node, - must_report); + tipc_subscrp_report_overlap(s, sseq->lower, + sseq->upper, + TIPC_PUBLISHED, + crs->ref, crs->node, + must_report); must_report = 0; } } diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c index ce9121e8e990..53e0fee80086 100644 --- a/net/tipc/netlink_compat.c +++ b/net/tipc/netlink_compat.c @@ -55,6 +55,7 @@ struct tipc_nl_compat_msg { int rep_type; int rep_size; int req_type; + struct net *net; struct sk_buff *rep; struct tlv_desc *req; struct sock *dst_sk; @@ -68,7 +69,8 @@ struct tipc_nl_compat_cmd_dump { struct tipc_nl_compat_cmd_doit { int (*doit)(struct sk_buff *skb, struct genl_info *info); - int (*transcode)(struct sk_buff *skb, struct tipc_nl_compat_msg *msg); + int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd, + struct sk_buff *skb, struct tipc_nl_compat_msg *msg); }; static int tipc_skb_tailroom(struct sk_buff *skb) @@ -281,7 +283,7 @@ static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, if (!trans_buf) return -ENOMEM; - err = (*cmd->transcode)(trans_buf, msg); + err = (*cmd->transcode)(cmd, trans_buf, msg); if (err) goto trans_out; @@ -353,7 +355,8 @@ static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, nla_len(bearer[TIPC_NLA_BEARER_NAME])); } -static int tipc_nl_compat_bearer_enable(struct sk_buff *skb, +static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, + struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { struct nlattr *prop; @@ -385,7 +388,8 @@ static int tipc_nl_compat_bearer_enable(struct sk_buff *skb, return 0; } -static int tipc_nl_compat_bearer_disable(struct sk_buff *skb, +static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, + struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { char *name; @@ -576,11 +580,81 @@ static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, &link_info, sizeof(link_info)); } -static int tipc_nl_compat_link_set(struct sk_buff *skb, - struct tipc_nl_compat_msg *msg) +static int __tipc_add_link_prop(struct sk_buff *skb, + struct tipc_nl_compat_msg *msg, + struct tipc_link_config *lc) +{ + switch (msg->cmd) { + case TIPC_CMD_SET_LINK_PRI: + return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); + case TIPC_CMD_SET_LINK_TOL: + return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); + case TIPC_CMD_SET_LINK_WINDOW: + return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); + } + + return -EINVAL; +} + +static int tipc_nl_compat_media_set(struct sk_buff *skb, + struct tipc_nl_compat_msg *msg) { - struct nlattr *link; struct nlattr *prop; + struct nlattr *media; + struct tipc_link_config *lc; + + lc = (struct tipc_link_config *)TLV_DATA(msg->req); + + media = nla_nest_start(skb, TIPC_NLA_MEDIA); + if (!media) + return -EMSGSIZE; + + if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) + return -EMSGSIZE; + + prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP); + if (!prop) + return -EMSGSIZE; + + __tipc_add_link_prop(skb, msg, lc); + nla_nest_end(skb, prop); + nla_nest_end(skb, media); + + return 0; +} + +static int tipc_nl_compat_bearer_set(struct sk_buff *skb, + struct tipc_nl_compat_msg *msg) +{ + struct nlattr *prop; + struct nlattr *bearer; + struct tipc_link_config *lc; + + lc = (struct tipc_link_config *)TLV_DATA(msg->req); + + bearer = nla_nest_start(skb, TIPC_NLA_BEARER); + if (!bearer) + return -EMSGSIZE; + + if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) + return -EMSGSIZE; + + prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); + if (!prop) + return -EMSGSIZE; + + __tipc_add_link_prop(skb, msg, lc); + nla_nest_end(skb, prop); + nla_nest_end(skb, bearer); + + return 0; +} + +static int __tipc_nl_compat_link_set(struct sk_buff *skb, + struct tipc_nl_compat_msg *msg) +{ + struct nlattr *prop; + struct nlattr *link; struct tipc_link_config *lc; lc = (struct tipc_link_config *)TLV_DATA(msg->req); @@ -596,24 +670,40 @@ static int tipc_nl_compat_link_set(struct sk_buff *skb, if (!prop) return -EMSGSIZE; - if (msg->cmd == TIPC_CMD_SET_LINK_PRI) { - if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value))) - return -EMSGSIZE; - } else if (msg->cmd == TIPC_CMD_SET_LINK_TOL) { - if (nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value))) - return -EMSGSIZE; - } else if (msg->cmd == TIPC_CMD_SET_LINK_WINDOW) { - if (nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value))) - return -EMSGSIZE; - } - + __tipc_add_link_prop(skb, msg, lc); nla_nest_end(skb, prop); nla_nest_end(skb, link); return 0; } -static int tipc_nl_compat_link_reset_stats(struct sk_buff *skb, +static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, + struct sk_buff *skb, + struct tipc_nl_compat_msg *msg) +{ + struct tipc_link_config *lc; + struct tipc_bearer *bearer; + struct tipc_media *media; + + lc = (struct tipc_link_config *)TLV_DATA(msg->req); + + media = tipc_media_find(lc->name); + if (media) { + cmd->doit = &tipc_nl_media_set; + return tipc_nl_compat_media_set(skb, msg); + } + + bearer = tipc_bearer_find(msg->net, lc->name); + if (bearer) { + cmd->doit = &tipc_nl_bearer_set; + return tipc_nl_compat_bearer_set(skb, msg); + } + + return __tipc_nl_compat_link_set(skb, msg); +} + +static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, + struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { char *name; @@ -851,7 +941,8 @@ static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, sizeof(node_info)); } -static int tipc_nl_compat_net_set(struct sk_buff *skb, +static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, + struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { u32 val; @@ -1007,7 +1098,6 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) struct nlmsghdr *req_nlh; struct nlmsghdr *rep_nlh; struct tipc_genlmsghdr *req_userhdr = info->userhdr; - struct net *net = genl_info_net(info); memset(&msg, 0, sizeof(msg)); @@ -1015,6 +1105,7 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; msg.cmd = req_userhdr->cmd; msg.dst_sk = info->dst_sk; + msg.net = genl_info_net(info); if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); @@ -1030,7 +1121,7 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) } err = tipc_nl_compat_handle(&msg); - if (err == -EOPNOTSUPP) + if ((err == -EOPNOTSUPP) || (err == -EPERM)) msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); else if (err == -EINVAL) msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); @@ -1043,7 +1134,7 @@ send: rep_nlh = nlmsg_hdr(msg.rep); memcpy(rep_nlh, info->nlhdr, len); rep_nlh->nlmsg_len = msg.rep->len; - genlmsg_unicast(net, msg.rep, NETLINK_CB(skb).portid); + genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); return err; } diff --git a/net/tipc/server.c b/net/tipc/server.c index 77ff03ed1e18..a91a2f79209a 100644 --- a/net/tipc/server.c +++ b/net/tipc/server.c @@ -309,6 +309,10 @@ static int tipc_accept_from_sock(struct tipc_conn *con) /* Notify that new connection is incoming */ newcon->usr_data = s->tipc_conn_new(newcon->conid); + if (!newcon->usr_data) { + sock_release(newsock); + return -ENOMEM; + } /* Wake up receive process in case of 'SYN+' message */ newsock->sk->sk_data_ready(newsock->sk); diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 9074b5cede38..8f3c8e2cef8e 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -342,7 +342,7 @@ static int tipc_sk_create(struct net *net, struct socket *sock, } /* Allocate socket's protocol area */ - sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); + sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); if (sk == NULL) return -ENOMEM; diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c index 1c147c869c2e..350cca33ee0a 100644 --- a/net/tipc/subscr.c +++ b/net/tipc/subscr.c @@ -40,16 +40,21 @@ /** * struct tipc_subscriber - TIPC network topology subscriber + * @kref: reference counter to tipc_subscription object * @conid: connection identifier to server connecting to subscriber * @lock: control access to subscriber - * @subscription_list: list of subscription objects for this subscriber + * @subscrp_list: list of subscription objects for this subscriber */ struct tipc_subscriber { + struct kref kref; int conid; spinlock_t lock; - struct list_head subscription_list; + struct list_head subscrp_list; }; +static void tipc_subscrp_delete(struct tipc_subscription *sub); +static void tipc_subscrb_put(struct tipc_subscriber *subscriber); + /** * htohl - convert value to endianness used by destination * @in: value to convert @@ -62,9 +67,9 @@ static u32 htohl(u32 in, int swap) return swap ? swab32(in) : in; } -static void subscr_send_event(struct tipc_subscription *sub, u32 found_lower, - u32 found_upper, u32 event, u32 port_ref, - u32 node) +static void tipc_subscrp_send_event(struct tipc_subscription *sub, + u32 found_lower, u32 found_upper, + u32 event, u32 port_ref, u32 node) { struct tipc_net *tn = net_generic(sub->net, tipc_net_id); struct tipc_subscriber *subscriber = sub->subscriber; @@ -82,12 +87,13 @@ static void subscr_send_event(struct tipc_subscription *sub, u32 found_lower, } /** - * tipc_subscr_overlap - test for subscription overlap with the given values + * tipc_subscrp_check_overlap - test for subscription overlap with the + * given values * * Returns 1 if there is overlap, otherwise 0. */ -int tipc_subscr_overlap(struct tipc_subscription *sub, u32 found_lower, - u32 found_upper) +int tipc_subscrp_check_overlap(struct tipc_subscription *sub, u32 found_lower, + u32 found_upper) { if (found_lower < sub->seq.lower) found_lower = sub->seq.lower; @@ -98,138 +104,121 @@ int tipc_subscr_overlap(struct tipc_subscription *sub, u32 found_lower, return 1; } -/** - * tipc_subscr_report_overlap - issue event if there is subscription overlap - * - * Protected by nameseq.lock in name_table.c - */ -void tipc_subscr_report_overlap(struct tipc_subscription *sub, u32 found_lower, - u32 found_upper, u32 event, u32 port_ref, - u32 node, int must) +void tipc_subscrp_report_overlap(struct tipc_subscription *sub, u32 found_lower, + u32 found_upper, u32 event, u32 port_ref, + u32 node, int must) { - if (!tipc_subscr_overlap(sub, found_lower, found_upper)) + if (!tipc_subscrp_check_overlap(sub, found_lower, found_upper)) return; if (!must && !(sub->filter & TIPC_SUB_PORTS)) return; - subscr_send_event(sub, found_lower, found_upper, event, port_ref, node); + tipc_subscrp_send_event(sub, found_lower, found_upper, event, port_ref, + node); } -static void subscr_timeout(unsigned long data) +static void tipc_subscrp_timeout(unsigned long data) { struct tipc_subscription *sub = (struct tipc_subscription *)data; struct tipc_subscriber *subscriber = sub->subscriber; - struct tipc_net *tn = net_generic(sub->net, tipc_net_id); - /* The spin lock per subscriber is used to protect its members */ - spin_lock_bh(&subscriber->lock); + /* Notify subscriber of timeout */ + tipc_subscrp_send_event(sub, sub->evt.s.seq.lower, sub->evt.s.seq.upper, + TIPC_SUBSCR_TIMEOUT, 0, 0); - /* Validate timeout (in case subscription is being cancelled) */ - if (sub->timeout == TIPC_WAIT_FOREVER) { - spin_unlock_bh(&subscriber->lock); - return; - } + spin_lock_bh(&subscriber->lock); + tipc_subscrp_delete(sub); + spin_unlock_bh(&subscriber->lock); - /* Unlink subscription from name table */ - tipc_nametbl_unsubscribe(sub); + tipc_subscrb_put(subscriber); +} - /* Unlink subscription from subscriber */ - list_del(&sub->subscription_list); +static void tipc_subscrb_kref_release(struct kref *kref) +{ + struct tipc_subscriber *subcriber = container_of(kref, + struct tipc_subscriber, kref); - spin_unlock_bh(&subscriber->lock); + kfree(subcriber); +} - /* Notify subscriber of timeout */ - subscr_send_event(sub, sub->evt.s.seq.lower, sub->evt.s.seq.upper, - TIPC_SUBSCR_TIMEOUT, 0, 0); +static void tipc_subscrb_put(struct tipc_subscriber *subscriber) +{ + kref_put(&subscriber->kref, tipc_subscrb_kref_release); +} - /* Now destroy subscription */ - kfree(sub); - atomic_dec(&tn->subscription_count); +static void tipc_subscrb_get(struct tipc_subscriber *subscriber) +{ + kref_get(&subscriber->kref); } -/** - * subscr_del - delete a subscription within a subscription list - * - * Called with subscriber lock held. - */ -static void subscr_del(struct tipc_subscription *sub) +static struct tipc_subscriber *tipc_subscrb_create(int conid) { - struct tipc_net *tn = net_generic(sub->net, tipc_net_id); + struct tipc_subscriber *subscriber; - tipc_nametbl_unsubscribe(sub); - list_del(&sub->subscription_list); - kfree(sub); - atomic_dec(&tn->subscription_count); + subscriber = kzalloc(sizeof(*subscriber), GFP_ATOMIC); + if (!subscriber) { + pr_warn("Subscriber rejected, no memory\n"); + return NULL; + } + kref_init(&subscriber->kref); + INIT_LIST_HEAD(&subscriber->subscrp_list); + subscriber->conid = conid; + spin_lock_init(&subscriber->lock); + + return subscriber; } -static void subscr_release(struct tipc_subscriber *subscriber) +static void tipc_subscrb_delete(struct tipc_subscriber *subscriber) { - struct tipc_subscription *sub; - struct tipc_subscription *sub_temp; + struct tipc_subscription *sub, *temp; spin_lock_bh(&subscriber->lock); - /* Destroy any existing subscriptions for subscriber */ - list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list, - subscription_list) { - if (sub->timeout != TIPC_WAIT_FOREVER) { - spin_unlock_bh(&subscriber->lock); - del_timer_sync(&sub->timer); - spin_lock_bh(&subscriber->lock); + list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list, + subscrp_list) { + if (del_timer(&sub->timer)) { + tipc_subscrp_delete(sub); + tipc_subscrb_put(subscriber); } - subscr_del(sub); } spin_unlock_bh(&subscriber->lock); - /* Now destroy subscriber */ - kfree(subscriber); + tipc_subscrb_put(subscriber); } -/** - * subscr_cancel - handle subscription cancellation request - * - * Called with subscriber lock held. Routine must temporarily release lock - * to enable the subscription timeout routine to finish without deadlocking; - * the lock is then reclaimed to allow caller to release it upon return. - * - * Note that fields of 's' use subscriber's endianness! - */ -static void subscr_cancel(struct tipc_subscr *s, - struct tipc_subscriber *subscriber) +static void tipc_subscrp_delete(struct tipc_subscription *sub) { - struct tipc_subscription *sub; - struct tipc_subscription *sub_temp; - int found = 0; + struct tipc_net *tn = net_generic(sub->net, tipc_net_id); + + tipc_nametbl_unsubscribe(sub); + list_del(&sub->subscrp_list); + kfree(sub); + atomic_dec(&tn->subscription_count); +} +static void tipc_subscrp_cancel(struct tipc_subscr *s, + struct tipc_subscriber *subscriber) +{ + struct tipc_subscription *sub, *temp; + + spin_lock_bh(&subscriber->lock); /* Find first matching subscription, exit if not found */ - list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list, - subscription_list) { + list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list, + subscrp_list) { if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) { - found = 1; + if (del_timer(&sub->timer)) { + tipc_subscrp_delete(sub); + tipc_subscrb_put(subscriber); + } break; } } - if (!found) - return; - - /* Cancel subscription timer (if used), then delete subscription */ - if (sub->timeout != TIPC_WAIT_FOREVER) { - sub->timeout = TIPC_WAIT_FOREVER; - spin_unlock_bh(&subscriber->lock); - del_timer_sync(&sub->timer); - spin_lock_bh(&subscriber->lock); - } - subscr_del(sub); + spin_unlock_bh(&subscriber->lock); } -/** - * subscr_subscribe - create subscription for subscriber - * - * Called with subscriber lock held. - */ -static int subscr_subscribe(struct net *net, struct tipc_subscr *s, - struct tipc_subscriber *subscriber, - struct tipc_subscription **sub_p) +static int tipc_subscrp_create(struct net *net, struct tipc_subscr *s, + struct tipc_subscriber *subscriber, + struct tipc_subscription **sub_p) { struct tipc_net *tn = net_generic(net, tipc_net_id); struct tipc_subscription *sub; @@ -241,7 +230,7 @@ static int subscr_subscribe(struct net *net, struct tipc_subscr *s, /* Detect & process a subscription cancellation request */ if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) { s->filter &= ~htohl(TIPC_SUB_CANCEL, swap); - subscr_cancel(s, subscriber); + tipc_subscrp_cancel(s, subscriber); return 0; } @@ -273,62 +262,51 @@ static int subscr_subscribe(struct net *net, struct tipc_subscr *s, kfree(sub); return -EINVAL; } - list_add(&sub->subscription_list, &subscriber->subscription_list); + spin_lock_bh(&subscriber->lock); + list_add(&sub->subscrp_list, &subscriber->subscrp_list); + spin_unlock_bh(&subscriber->lock); sub->subscriber = subscriber; sub->swap = swap; - memcpy(&sub->evt.s, s, sizeof(struct tipc_subscr)); + memcpy(&sub->evt.s, s, sizeof(*s)); atomic_inc(&tn->subscription_count); - if (sub->timeout != TIPC_WAIT_FOREVER) { - setup_timer(&sub->timer, subscr_timeout, (unsigned long)sub); - mod_timer(&sub->timer, jiffies + sub->timeout); - } + setup_timer(&sub->timer, tipc_subscrp_timeout, (unsigned long)sub); + if (sub->timeout != TIPC_WAIT_FOREVER) + sub->timeout += jiffies; + if (!mod_timer(&sub->timer, sub->timeout)) + tipc_subscrb_get(subscriber); *sub_p = sub; return 0; } /* Handle one termination request for the subscriber */ -static void subscr_conn_shutdown_event(int conid, void *usr_data) +static void tipc_subscrb_shutdown_cb(int conid, void *usr_data) { - subscr_release((struct tipc_subscriber *)usr_data); + tipc_subscrb_delete((struct tipc_subscriber *)usr_data); } /* Handle one request to create a new subscription for the subscriber */ -static void subscr_conn_msg_event(struct net *net, int conid, - struct sockaddr_tipc *addr, void *usr_data, - void *buf, size_t len) +static void tipc_subscrb_rcv_cb(struct net *net, int conid, + struct sockaddr_tipc *addr, void *usr_data, + void *buf, size_t len) { struct tipc_subscriber *subscriber = usr_data; struct tipc_subscription *sub = NULL; struct tipc_net *tn = net_generic(net, tipc_net_id); - spin_lock_bh(&subscriber->lock); - subscr_subscribe(net, (struct tipc_subscr *)buf, subscriber, &sub); + tipc_subscrp_create(net, (struct tipc_subscr *)buf, subscriber, &sub); if (sub) tipc_nametbl_subscribe(sub); else tipc_conn_terminate(tn->topsrv, subscriber->conid); - spin_unlock_bh(&subscriber->lock); } /* Handle one request to establish a new subscriber */ -static void *subscr_named_msg_event(int conid) +static void *tipc_subscrb_connect_cb(int conid) { - struct tipc_subscriber *subscriber; - - /* Create subscriber object */ - subscriber = kzalloc(sizeof(struct tipc_subscriber), GFP_ATOMIC); - if (subscriber == NULL) { - pr_warn("Subscriber rejected, no memory\n"); - return NULL; - } - INIT_LIST_HEAD(&subscriber->subscription_list); - subscriber->conid = conid; - spin_lock_init(&subscriber->lock); - - return (void *)subscriber; + return (void *)tipc_subscrb_create(conid); } -int tipc_subscr_start(struct net *net) +int tipc_topsrv_start(struct net *net) { struct tipc_net *tn = net_generic(net, tipc_net_id); const char name[] = "topology_server"; @@ -355,9 +333,9 @@ int tipc_subscr_start(struct net *net) topsrv->imp = TIPC_CRITICAL_IMPORTANCE; topsrv->type = SOCK_SEQPACKET; topsrv->max_rcvbuf_size = sizeof(struct tipc_subscr); - topsrv->tipc_conn_recvmsg = subscr_conn_msg_event; - topsrv->tipc_conn_new = subscr_named_msg_event; - topsrv->tipc_conn_shutdown = subscr_conn_shutdown_event; + topsrv->tipc_conn_recvmsg = tipc_subscrb_rcv_cb; + topsrv->tipc_conn_new = tipc_subscrb_connect_cb; + topsrv->tipc_conn_shutdown = tipc_subscrb_shutdown_cb; strncpy(topsrv->name, name, strlen(name) + 1); tn->topsrv = topsrv; @@ -366,7 +344,7 @@ int tipc_subscr_start(struct net *net) return tipc_server_start(topsrv); } -void tipc_subscr_stop(struct net *net) +void tipc_topsrv_stop(struct net *net) { struct tipc_net *tn = net_generic(net, tipc_net_id); struct tipc_server *topsrv = tn->topsrv; diff --git a/net/tipc/subscr.h b/net/tipc/subscr.h index 33488bd9fe3c..92ee18cc5fe6 100644 --- a/net/tipc/subscr.h +++ b/net/tipc/subscr.h @@ -54,7 +54,7 @@ struct tipc_subscriber; * @filter: event filtering to be done for subscription * @timer: timer governing subscription duration (optional) * @nameseq_list: adjacent subscriptions in name sequence's subscription list - * @subscription_list: adjacent subscriptions in subscriber's subscription list + * @subscrp_list: adjacent subscriptions in subscriber's subscription list * @server_ref: object reference of server port associated with subscription * @swap: indicates if subscriber uses opposite endianness in its messages * @evt: template for events generated by subscription @@ -67,17 +67,17 @@ struct tipc_subscription { u32 filter; struct timer_list timer; struct list_head nameseq_list; - struct list_head subscription_list; + struct list_head subscrp_list; int swap; struct tipc_event evt; }; -int tipc_subscr_overlap(struct tipc_subscription *sub, u32 found_lower, - u32 found_upper); -void tipc_subscr_report_overlap(struct tipc_subscription *sub, u32 found_lower, - u32 found_upper, u32 event, u32 port_ref, - u32 node, int must); -int tipc_subscr_start(struct net *net); -void tipc_subscr_stop(struct net *net); +int tipc_subscrp_check_overlap(struct tipc_subscription *sub, u32 found_lower, + u32 found_upper); +void tipc_subscrp_report_overlap(struct tipc_subscription *sub, + u32 found_lower, u32 found_upper, u32 event, + u32 port_ref, u32 node, int must); +int tipc_topsrv_start(struct net *net); +void tipc_topsrv_stop(struct net *net); #endif |