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Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/discover.c4
-rw-r--r--net/tipc/link.c2
-rw-r--r--net/tipc/msg.c16
-rw-r--r--net/tipc/msg.h2
-rw-r--r--net/tipc/name_distr.c2
-rw-r--r--net/tipc/node.c9
-rw-r--r--net/tipc/server.c48
-rw-r--r--net/tipc/subscr.c124
-rw-r--r--net/tipc/subscr.h1
9 files changed, 112 insertions, 96 deletions
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 6b109a808d4c..02462d67d191 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -169,7 +169,7 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *skb,
/* Send response, if necessary */
if (respond && (mtyp == DSC_REQ_MSG)) {
- rskb = tipc_buf_acquire(MAX_H_SIZE);
+ rskb = tipc_buf_acquire(MAX_H_SIZE, GFP_ATOMIC);
if (!rskb)
return;
tipc_disc_init_msg(net, rskb, DSC_RESP_MSG, bearer);
@@ -278,7 +278,7 @@ int tipc_disc_create(struct net *net, struct tipc_bearer *b,
req = kmalloc(sizeof(*req), GFP_ATOMIC);
if (!req)
return -ENOMEM;
- req->buf = tipc_buf_acquire(MAX_H_SIZE);
+ req->buf = tipc_buf_acquire(MAX_H_SIZE, GFP_ATOMIC);
if (!req->buf) {
kfree(req);
return -ENOMEM;
diff --git a/net/tipc/link.c b/net/tipc/link.c
index bda89bf9f4ff..4e8647aef01c 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1395,7 +1395,7 @@ tnl:
msg_set_seqno(hdr, seqno++);
pktlen = msg_size(hdr);
msg_set_size(&tnlhdr, pktlen + INT_H_SIZE);
- tnlskb = tipc_buf_acquire(pktlen + INT_H_SIZE);
+ tnlskb = tipc_buf_acquire(pktlen + INT_H_SIZE, GFP_ATOMIC);
if (!tnlskb) {
pr_warn("%sunable to send packet\n", link_co_err);
return;
diff --git a/net/tipc/msg.c b/net/tipc/msg.c
index a22be502f1bd..ab02d0742476 100644
--- a/net/tipc/msg.c
+++ b/net/tipc/msg.c
@@ -58,12 +58,12 @@ static unsigned int align(unsigned int i)
* NOTE: Headroom is reserved to allow prepending of a data link header.
* There may also be unrequested tailroom present at the buffer's end.
*/
-struct sk_buff *tipc_buf_acquire(u32 size)
+struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp)
{
struct sk_buff *skb;
unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
- skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
+ skb = alloc_skb_fclone(buf_size, gfp);
if (skb) {
skb_reserve(skb, BUF_HEADROOM);
skb_put(skb, size);
@@ -95,7 +95,7 @@ struct sk_buff *tipc_msg_create(uint user, uint type,
struct tipc_msg *msg;
struct sk_buff *buf;
- buf = tipc_buf_acquire(hdr_sz + data_sz);
+ buf = tipc_buf_acquire(hdr_sz + data_sz, GFP_ATOMIC);
if (unlikely(!buf))
return NULL;
@@ -261,7 +261,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
/* No fragmentation needed? */
if (likely(msz <= pktmax)) {
- skb = tipc_buf_acquire(msz);
+ skb = tipc_buf_acquire(msz, GFP_KERNEL);
if (unlikely(!skb))
return -ENOMEM;
skb_orphan(skb);
@@ -282,7 +282,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
msg_set_importance(&pkthdr, msg_importance(mhdr));
/* Prepare first fragment */
- skb = tipc_buf_acquire(pktmax);
+ skb = tipc_buf_acquire(pktmax, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_orphan(skb);
@@ -313,7 +313,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
pktsz = drem + INT_H_SIZE;
else
pktsz = pktmax;
- skb = tipc_buf_acquire(pktsz);
+ skb = tipc_buf_acquire(pktsz, GFP_KERNEL);
if (!skb) {
rc = -ENOMEM;
goto error;
@@ -448,7 +448,7 @@ bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg,
if (msz > (max / 2))
return false;
- _skb = tipc_buf_acquire(max);
+ _skb = tipc_buf_acquire(max, GFP_ATOMIC);
if (!_skb)
return false;
@@ -496,7 +496,7 @@ bool tipc_msg_reverse(u32 own_node, struct sk_buff **skb, int err)
/* Never return SHORT header; expand by replacing buffer if necessary */
if (msg_short(hdr)) {
- *skb = tipc_buf_acquire(BASIC_H_SIZE + dlen);
+ *skb = tipc_buf_acquire(BASIC_H_SIZE + dlen, GFP_ATOMIC);
if (!*skb)
goto exit;
memcpy((*skb)->data + BASIC_H_SIZE, msg_data(hdr), dlen);
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 8d408612ffa4..2c3dc38abf9c 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -820,7 +820,7 @@ static inline bool msg_is_reset(struct tipc_msg *hdr)
return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
}
-struct sk_buff *tipc_buf_acquire(u32 size);
+struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
bool tipc_msg_validate(struct sk_buff *skb);
bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index c1cfd92de17a..23f8899e0f8c 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -69,7 +69,7 @@ static struct sk_buff *named_prepare_buf(struct net *net, u32 type, u32 size,
u32 dest)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size);
+ struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size, GFP_ATOMIC);
struct tipc_msg *msg;
if (buf != NULL) {
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 9d2f4c2b08ab..27753325e06e 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -263,6 +263,11 @@ static void tipc_node_write_lock(struct tipc_node *n)
write_lock_bh(&n->lock);
}
+static void tipc_node_write_unlock_fast(struct tipc_node *n)
+{
+ write_unlock_bh(&n->lock);
+}
+
static void tipc_node_write_unlock(struct tipc_node *n)
{
struct net *net = n->net;
@@ -417,7 +422,7 @@ void tipc_node_subscribe(struct net *net, struct list_head *subscr, u32 addr)
}
tipc_node_write_lock(n);
list_add_tail(subscr, &n->publ_list);
- tipc_node_write_unlock(n);
+ tipc_node_write_unlock_fast(n);
tipc_node_put(n);
}
@@ -435,7 +440,7 @@ void tipc_node_unsubscribe(struct net *net, struct list_head *subscr, u32 addr)
}
tipc_node_write_lock(n);
list_del_init(subscr);
- tipc_node_write_unlock(n);
+ tipc_node_write_unlock_fast(n);
tipc_node_put(n);
}
diff --git a/net/tipc/server.c b/net/tipc/server.c
index 215849ce453d..3cd6402e812c 100644
--- a/net/tipc/server.c
+++ b/net/tipc/server.c
@@ -86,12 +86,12 @@ struct outqueue_entry {
static void tipc_recv_work(struct work_struct *work);
static void tipc_send_work(struct work_struct *work);
static void tipc_clean_outqueues(struct tipc_conn *con);
-static void tipc_sock_release(struct tipc_conn *con);
static void tipc_conn_kref_release(struct kref *kref)
{
struct tipc_conn *con = container_of(kref, struct tipc_conn, kref);
- struct sockaddr_tipc *saddr = con->server->saddr;
+ struct tipc_server *s = con->server;
+ struct sockaddr_tipc *saddr = s->saddr;
struct socket *sock = con->sock;
struct sock *sk;
@@ -103,9 +103,13 @@ static void tipc_conn_kref_release(struct kref *kref)
}
saddr->scope = -TIPC_NODE_SCOPE;
kernel_bind(sock, (struct sockaddr *)saddr, sizeof(*saddr));
- tipc_sock_release(con);
sock_release(sock);
con->sock = NULL;
+
+ spin_lock_bh(&s->idr_lock);
+ idr_remove(&s->conn_idr, con->conid);
+ s->idr_in_use--;
+ spin_unlock_bh(&s->idr_lock);
}
tipc_clean_outqueues(con);
@@ -128,8 +132,10 @@ static struct tipc_conn *tipc_conn_lookup(struct tipc_server *s, int conid)
spin_lock_bh(&s->idr_lock);
con = idr_find(&s->conn_idr, conid);
- if (con)
+ if (con && test_bit(CF_CONNECTED, &con->flags))
conn_get(con);
+ else
+ con = NULL;
spin_unlock_bh(&s->idr_lock);
return con;
}
@@ -186,26 +192,15 @@ static void tipc_unregister_callbacks(struct tipc_conn *con)
write_unlock_bh(&sk->sk_callback_lock);
}
-static void tipc_sock_release(struct tipc_conn *con)
-{
- struct tipc_server *s = con->server;
-
- if (con->conid)
- s->tipc_conn_release(con->conid, con->usr_data);
-
- tipc_unregister_callbacks(con);
-}
-
static void tipc_close_conn(struct tipc_conn *con)
{
struct tipc_server *s = con->server;
if (test_and_clear_bit(CF_CONNECTED, &con->flags)) {
+ tipc_unregister_callbacks(con);
- spin_lock_bh(&s->idr_lock);
- idr_remove(&s->conn_idr, con->conid);
- s->idr_in_use--;
- spin_unlock_bh(&s->idr_lock);
+ if (con->conid)
+ s->tipc_conn_release(con->conid, con->usr_data);
/* We shouldn't flush pending works as we may be in the
* thread. In fact the races with pending rx/tx work structs
@@ -458,6 +453,11 @@ int tipc_conn_sendmsg(struct tipc_server *s, int conid,
if (!con)
return -EINVAL;
+ if (!test_bit(CF_CONNECTED, &con->flags)) {
+ conn_put(con);
+ return 0;
+ }
+
e = tipc_alloc_entry(data, len);
if (!e) {
conn_put(con);
@@ -471,12 +471,8 @@ int tipc_conn_sendmsg(struct tipc_server *s, int conid,
list_add_tail(&e->list, &con->outqueue);
spin_unlock_bh(&con->outqueue_lock);
- if (test_bit(CF_CONNECTED, &con->flags)) {
- if (!queue_work(s->send_wq, &con->swork))
- conn_put(con);
- } else {
+ if (!queue_work(s->send_wq, &con->swork))
conn_put(con);
- }
return 0;
}
@@ -500,7 +496,7 @@ static void tipc_send_to_sock(struct tipc_conn *con)
int ret;
spin_lock_bh(&con->outqueue_lock);
- while (1) {
+ while (test_bit(CF_CONNECTED, &con->flags)) {
e = list_entry(con->outqueue.next, struct outqueue_entry,
list);
if ((struct list_head *) e == &con->outqueue)
@@ -623,14 +619,12 @@ int tipc_server_start(struct tipc_server *s)
void tipc_server_stop(struct tipc_server *s)
{
struct tipc_conn *con;
- int total = 0;
int id;
spin_lock_bh(&s->idr_lock);
- for (id = 0; total < s->idr_in_use; id++) {
+ for (id = 0; s->idr_in_use; id++) {
con = idr_find(&s->conn_idr, id);
if (con) {
- total++;
spin_unlock_bh(&s->idr_lock);
tipc_close_conn(con);
spin_lock_bh(&s->idr_lock);
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index 0dd02244e21d..9d94e65d0894 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -54,6 +54,8 @@ struct tipc_subscriber {
static void tipc_subscrp_delete(struct tipc_subscription *sub);
static void tipc_subscrb_put(struct tipc_subscriber *subscriber);
+static void tipc_subscrp_put(struct tipc_subscription *subscription);
+static void tipc_subscrp_get(struct tipc_subscription *subscription);
/**
* htohl - convert value to endianness used by destination
@@ -123,6 +125,7 @@ void tipc_subscrp_report_overlap(struct tipc_subscription *sub, u32 found_lower,
{
struct tipc_name_seq seq;
+ tipc_subscrp_get(sub);
tipc_subscrp_convert_seq(&sub->evt.s.seq, sub->swap, &seq);
if (!tipc_subscrp_check_overlap(&seq, found_lower, found_upper))
return;
@@ -132,30 +135,23 @@ void tipc_subscrp_report_overlap(struct tipc_subscription *sub, u32 found_lower,
tipc_subscrp_send_event(sub, found_lower, found_upper, event, port_ref,
node);
+ tipc_subscrp_put(sub);
}
static void tipc_subscrp_timeout(unsigned long data)
{
struct tipc_subscription *sub = (struct tipc_subscription *)data;
- struct tipc_subscriber *subscriber = sub->subscriber;
/* Notify subscriber of timeout */
tipc_subscrp_send_event(sub, sub->evt.s.seq.lower, sub->evt.s.seq.upper,
TIPC_SUBSCR_TIMEOUT, 0, 0);
- spin_lock_bh(&subscriber->lock);
- tipc_subscrp_delete(sub);
- spin_unlock_bh(&subscriber->lock);
-
- tipc_subscrb_put(subscriber);
+ tipc_subscrp_put(sub);
}
static void tipc_subscrb_kref_release(struct kref *kref)
{
- struct tipc_subscriber *subcriber = container_of(kref,
- struct tipc_subscriber, kref);
-
- kfree(subcriber);
+ kfree(container_of(kref,struct tipc_subscriber, kref));
}
static void tipc_subscrb_put(struct tipc_subscriber *subscriber)
@@ -168,6 +164,59 @@ static void tipc_subscrb_get(struct tipc_subscriber *subscriber)
kref_get(&subscriber->kref);
}
+static void tipc_subscrp_kref_release(struct kref *kref)
+{
+ struct tipc_subscription *sub = container_of(kref,
+ struct tipc_subscription,
+ kref);
+ struct tipc_net *tn = net_generic(sub->net, tipc_net_id);
+ struct tipc_subscriber *subscriber = sub->subscriber;
+
+ spin_lock_bh(&subscriber->lock);
+ tipc_nametbl_unsubscribe(sub);
+ list_del(&sub->subscrp_list);
+ atomic_dec(&tn->subscription_count);
+ spin_unlock_bh(&subscriber->lock);
+ kfree(sub);
+ tipc_subscrb_put(subscriber);
+}
+
+static void tipc_subscrp_put(struct tipc_subscription *subscription)
+{
+ kref_put(&subscription->kref, tipc_subscrp_kref_release);
+}
+
+static void tipc_subscrp_get(struct tipc_subscription *subscription)
+{
+ kref_get(&subscription->kref);
+}
+
+/* tipc_subscrb_subscrp_delete - delete a specific subscription or all
+ * subscriptions for a given subscriber.
+ */
+static void tipc_subscrb_subscrp_delete(struct tipc_subscriber *subscriber,
+ struct tipc_subscr *s)
+{
+ struct list_head *subscription_list = &subscriber->subscrp_list;
+ struct tipc_subscription *sub, *temp;
+
+ spin_lock_bh(&subscriber->lock);
+ list_for_each_entry_safe(sub, temp, subscription_list, subscrp_list) {
+ if (s && memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr)))
+ continue;
+
+ tipc_subscrp_get(sub);
+ spin_unlock_bh(&subscriber->lock);
+ tipc_subscrp_delete(sub);
+ tipc_subscrp_put(sub);
+ spin_lock_bh(&subscriber->lock);
+
+ if (s)
+ break;
+ }
+ spin_unlock_bh(&subscriber->lock);
+}
+
static struct tipc_subscriber *tipc_subscrb_create(int conid)
{
struct tipc_subscriber *subscriber;
@@ -177,8 +226,8 @@ static struct tipc_subscriber *tipc_subscrb_create(int conid)
pr_warn("Subscriber rejected, no memory\n");
return NULL;
}
- kref_init(&subscriber->kref);
INIT_LIST_HEAD(&subscriber->subscrp_list);
+ kref_init(&subscriber->kref);
subscriber->conid = conid;
spin_lock_init(&subscriber->lock);
@@ -187,55 +236,22 @@ static struct tipc_subscriber *tipc_subscrb_create(int conid)
static void tipc_subscrb_delete(struct tipc_subscriber *subscriber)
{
- struct tipc_subscription *sub, *temp;
- u32 timeout;
-
- spin_lock_bh(&subscriber->lock);
- /* Destroy any existing subscriptions for subscriber */
- list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list,
- subscrp_list) {
- timeout = htohl(sub->evt.s.timeout, sub->swap);
- if ((timeout == TIPC_WAIT_FOREVER) || del_timer(&sub->timer)) {
- tipc_subscrp_delete(sub);
- tipc_subscrb_put(subscriber);
- }
- }
- spin_unlock_bh(&subscriber->lock);
-
+ tipc_subscrb_subscrp_delete(subscriber, NULL);
tipc_subscrb_put(subscriber);
}
static void tipc_subscrp_delete(struct tipc_subscription *sub)
{
- struct tipc_net *tn = net_generic(sub->net, tipc_net_id);
+ u32 timeout = htohl(sub->evt.s.timeout, sub->swap);
- tipc_nametbl_unsubscribe(sub);
- list_del(&sub->subscrp_list);
- kfree(sub);
- atomic_dec(&tn->subscription_count);
+ if (timeout == TIPC_WAIT_FOREVER || del_timer(&sub->timer))
+ tipc_subscrp_put(sub);
}
static void tipc_subscrp_cancel(struct tipc_subscr *s,
struct tipc_subscriber *subscriber)
{
- struct tipc_subscription *sub, *temp;
- u32 timeout;
-
- spin_lock_bh(&subscriber->lock);
- /* Find first matching subscription, exit if not found */
- list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list,
- subscrp_list) {
- if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) {
- timeout = htohl(sub->evt.s.timeout, sub->swap);
- if ((timeout == TIPC_WAIT_FOREVER) ||
- del_timer(&sub->timer)) {
- tipc_subscrp_delete(sub);
- tipc_subscrb_put(subscriber);
- }
- break;
- }
- }
- spin_unlock_bh(&subscriber->lock);
+ tipc_subscrb_subscrp_delete(subscriber, s);
}
static struct tipc_subscription *tipc_subscrp_create(struct net *net,
@@ -272,6 +288,7 @@ static struct tipc_subscription *tipc_subscrp_create(struct net *net,
sub->swap = swap;
memcpy(&sub->evt.s, s, sizeof(*s));
atomic_inc(&tn->subscription_count);
+ kref_init(&sub->kref);
return sub;
}
@@ -288,17 +305,16 @@ static void tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
spin_lock_bh(&subscriber->lock);
list_add(&sub->subscrp_list, &subscriber->subscrp_list);
- tipc_subscrb_get(subscriber);
sub->subscriber = subscriber;
tipc_nametbl_subscribe(sub);
+ tipc_subscrb_get(subscriber);
spin_unlock_bh(&subscriber->lock);
+ setup_timer(&sub->timer, tipc_subscrp_timeout, (unsigned long)sub);
timeout = htohl(sub->evt.s.timeout, swap);
- if (timeout == TIPC_WAIT_FOREVER)
- return;
- setup_timer(&sub->timer, tipc_subscrp_timeout, (unsigned long)sub);
- mod_timer(&sub->timer, jiffies + msecs_to_jiffies(timeout));
+ if (timeout != TIPC_WAIT_FOREVER)
+ mod_timer(&sub->timer, jiffies + msecs_to_jiffies(timeout));
}
/* Handle one termination request for the subscriber */
diff --git a/net/tipc/subscr.h b/net/tipc/subscr.h
index be60103082c9..ffdc214c117a 100644
--- a/net/tipc/subscr.h
+++ b/net/tipc/subscr.h
@@ -57,6 +57,7 @@ struct tipc_subscriber;
* @evt: template for events generated by subscription
*/
struct tipc_subscription {
+ struct kref kref;
struct tipc_subscriber *subscriber;
struct net *net;
struct timer_list timer;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-10 04:05:41 +0300