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authorNeil Horman <nhorman@tuxdriver.com>2010-10-21 01:06:16 +0000
committerDavid S. Miller <davem@davemloft.net>2010-10-21 04:11:08 -0700
commitdb5a753bf198ef7a50e17d2ff358adf37efe8648 (patch)
tree50c1a4a117f567679bf4e6b6f9e472d0322567a2 /net/tipc/subscr.c
parent8c974438085d2c81b006daeaab8801eedbd19758 (diff)
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Revert d88dca79d3852a3623f606f781e013d61486828a
TIPC needs to have its endianess issues fixed. Unfortunately, the format of a subscriber message is passed in directly from user space, so requiring this message to be in network byte order breaks user space ABI. Revert this change until such time as we can determine how to do this in a backwards compatible manner. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/subscr.c')
-rw-r--r--net/tipc/subscr.c57
1 files changed, 35 insertions, 22 deletions
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index ff123e5..ac91f0d 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -76,6 +76,19 @@ struct top_srv {
static struct top_srv topsrv = { 0 };
/**
+ * 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
*
* Note: Must not hold subscriber's server port lock, since tipc_send() will
@@ -94,11 +107,11 @@ 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);
}
@@ -274,23 +287,16 @@ static void subscr_cancel(struct tipc_subscr *s,
{
struct subscription *sub;
struct subscription *sub_temp;
- __u32 type, lower, upper;
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);
-
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)) {
- found = 1;
- break;
- }
+ if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) {
+ found = 1;
+ break;
+ }
}
if (!found)
return;
@@ -319,10 +325,16 @@ 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;
}
@@ -347,11 +359,11 @@ 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);
+ 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)) {
@@ -364,6 +376,7 @@ 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) {