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Diffstat (limited to 'net/tipc/subscr.c')
-rw-r--r--net/tipc/subscr.c113
1 files changed, 49 insertions, 64 deletions
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index ab6eab4c45e2..ca04479c3d42 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -35,10 +35,8 @@
*/
#include "core.h"
-#include "dbg.h"
#include "name_table.h"
#include "port.h"
-#include "ref.h"
#include "subscr.h"
/**
@@ -66,14 +64,26 @@ struct subscriber {
*/
struct top_srv {
- u32 user_ref;
u32 setup_port;
atomic_t subscription_count;
struct list_head subscriber_list;
spinlock_t lock;
};
-static struct top_srv topsrv = { 0 };
+static struct top_srv topsrv;
+
+/**
+ * htohl - convert value to endianness used by destination
+ * @in: value to convert
+ * @swap: non-zero if endianness must be reversed
+ *
+ * Returns converted value
+ */
+
+static u32 htohl(u32 in, int swap)
+{
+ return swap ? swab32(in) : in;
+}
/**
* subscr_send_event - send a message containing a tipc_event to the subscriber
@@ -94,11 +104,11 @@ static void subscr_send_event(struct subscription *sub,
msg_sect.iov_base = (void *)&sub->evt;
msg_sect.iov_len = sizeof(struct tipc_event);
- sub->evt.event = htonl(event);
- sub->evt.found_lower = htonl(found_lower);
- sub->evt.found_upper = htonl(found_upper);
- sub->evt.port.ref = htonl(port_ref);
- sub->evt.port.node = htonl(node);
+ sub->evt.event = htohl(event, sub->swap);
+ sub->evt.found_lower = htohl(found_lower, sub->swap);
+ sub->evt.found_upper = htohl(found_upper, sub->swap);
+ sub->evt.port.ref = htohl(port_ref, sub->swap);
+ sub->evt.port.node = htohl(node, sub->swap);
tipc_send(sub->server_ref, 1, &msg_sect);
}
@@ -239,8 +249,6 @@ static void subscr_terminate(struct subscriber *subscriber)
k_cancel_timer(&sub->timer);
k_term_timer(&sub->timer);
}
- dbg("Term: Removing sub %u,%u,%u from subscriber %x list\n",
- sub->seq.type, sub->seq.lower, sub->seq.upper, subscriber);
subscr_del(sub);
}
@@ -274,29 +282,16 @@ static void subscr_cancel(struct tipc_subscr *s,
{
struct subscription *sub;
struct subscription *sub_temp;
- __u32 type, lower, upper, timeout, filter;
int found = 0;
/* Find first matching subscription, exit if not found */
- type = ntohl(s->seq.type);
- lower = ntohl(s->seq.lower);
- upper = ntohl(s->seq.upper);
- timeout = ntohl(s->timeout);
- filter = ntohl(s->filter) & ~TIPC_SUB_CANCEL;
-
list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list,
subscription_list) {
- if ((type == sub->seq.type) &&
- (lower == sub->seq.lower) &&
- (upper == sub->seq.upper) &&
- (timeout == sub->timeout) &&
- (filter == sub->filter) &&
- !memcmp(s->usr_handle,sub->evt.s.usr_handle,
- sizeof(s->usr_handle)) ){
- found = 1;
- break;
- }
+ if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) {
+ found = 1;
+ break;
+ }
}
if (!found)
return;
@@ -310,8 +305,6 @@ static void subscr_cancel(struct tipc_subscr *s,
k_term_timer(&sub->timer);
spin_lock_bh(subscriber->lock);
}
- dbg("Cancel: removing sub %u,%u,%u from subscriber %p list\n",
- sub->seq.type, sub->seq.lower, sub->seq.upper, subscriber);
subscr_del(sub);
}
@@ -325,10 +318,16 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
struct subscriber *subscriber)
{
struct subscription *sub;
+ int swap;
+
+ /* Determine subscriber's endianness */
+
+ swap = !(s->filter & (TIPC_SUB_PORTS | TIPC_SUB_SERVICE));
/* Detect & process a subscription cancellation request */
- if (ntohl(s->filter) & TIPC_SUB_CANCEL) {
+ if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {
+ s->filter &= ~htohl(TIPC_SUB_CANCEL, swap);
subscr_cancel(s, subscriber);
return NULL;
}
@@ -353,12 +352,13 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
/* Initialize subscription object */
- sub->seq.type = ntohl(s->seq.type);
- sub->seq.lower = ntohl(s->seq.lower);
- sub->seq.upper = ntohl(s->seq.upper);
- sub->timeout = ntohl(s->timeout);
- sub->filter = ntohl(s->filter);
- if ((sub->filter && (sub->filter != TIPC_SUB_PORTS)) ||
+ sub->seq.type = htohl(s->seq.type, swap);
+ sub->seq.lower = htohl(s->seq.lower, swap);
+ sub->seq.upper = htohl(s->seq.upper, swap);
+ sub->timeout = htohl(s->timeout, swap);
+ sub->filter = htohl(s->filter, swap);
+ if ((!(sub->filter & TIPC_SUB_PORTS) ==
+ !(sub->filter & TIPC_SUB_SERVICE)) ||
(sub->seq.lower > sub->seq.upper)) {
warn("Subscription rejected, illegal request\n");
kfree(sub);
@@ -369,6 +369,7 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
INIT_LIST_HEAD(&sub->nameseq_list);
list_add(&sub->subscription_list, &subscriber->subscription_list);
sub->server_ref = subscriber->port_ref;
+ sub->swap = swap;
memcpy(&sub->evt.s, s, sizeof(struct tipc_subscr));
atomic_inc(&topsrv.subscription_count);
if (sub->timeout != TIPC_WAIT_FOREVER) {
@@ -488,8 +489,7 @@ static void subscr_named_msg_event(void *usr_handle,
/* Create server port & establish connection to subscriber */
- tipc_createport(topsrv.user_ref,
- subscriber,
+ tipc_createport(subscriber,
importance,
NULL,
NULL,
@@ -536,21 +536,14 @@ static void subscr_named_msg_event(void *usr_handle,
int tipc_subscr_start(void)
{
struct tipc_name_seq seq = {TIPC_TOP_SRV, TIPC_TOP_SRV, TIPC_TOP_SRV};
- int res = -1;
+ int res;
- memset(&topsrv, 0, sizeof (topsrv));
+ memset(&topsrv, 0, sizeof(topsrv));
spin_lock_init(&topsrv.lock);
INIT_LIST_HEAD(&topsrv.subscriber_list);
spin_lock_bh(&topsrv.lock);
- res = tipc_attach(&topsrv.user_ref, NULL, NULL);
- if (res) {
- spin_unlock_bh(&topsrv.lock);
- return res;
- }
-
- res = tipc_createport(topsrv.user_ref,
- NULL,
+ res = tipc_createport(NULL,
TIPC_CRITICAL_IMPORTANCE,
NULL,
NULL,
@@ -564,16 +557,17 @@ int tipc_subscr_start(void)
goto failed;
res = tipc_nametbl_publish_rsv(topsrv.setup_port, TIPC_NODE_SCOPE, &seq);
- if (res)
+ if (res) {
+ tipc_deleteport(topsrv.setup_port);
+ topsrv.setup_port = 0;
goto failed;
+ }
spin_unlock_bh(&topsrv.lock);
return 0;
failed:
err("Failed to create subscription service\n");
- tipc_detach(topsrv.user_ref);
- topsrv.user_ref = 0;
spin_unlock_bh(&topsrv.lock);
return res;
}
@@ -584,8 +578,10 @@ void tipc_subscr_stop(void)
struct subscriber *subscriber_temp;
spinlock_t *subscriber_lock;
- if (topsrv.user_ref) {
+ if (topsrv.setup_port) {
tipc_deleteport(topsrv.setup_port);
+ topsrv.setup_port = 0;
+
list_for_each_entry_safe(subscriber, subscriber_temp,
&topsrv.subscriber_list,
subscriber_list) {
@@ -594,16 +590,5 @@ void tipc_subscr_stop(void)
subscr_terminate(subscriber);
spin_unlock_bh(subscriber_lock);
}
- tipc_detach(topsrv.user_ref);
- topsrv.user_ref = 0;
}
}
-
-
-int tipc_ispublished(struct tipc_name const *name)
-{
- u32 domain = 0;
-
- return(tipc_nametbl_translate(name->type, name->instance,&domain) != 0);
-}
-
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