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tipc: add host-endian copy of user subscription to struct tipc_subscription

Browse source 
We reduce and localize the usage of the tipc_sub_xx() macros by adding a
corresponding member, with fields set in host-endian format, to struct
tipc_subscription.

Signed-off-by: Jon Maloy <jmaloy@redhat.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Hoang Le <hoang.h.le@dektech.com.au>
Acked-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Acked-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2021-03-16 22:06:22 -04:00 committed by David S. Miller
parent 09f78b851e
commit 429189acac
3 changed files with 37 additions and 40 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

29
net/tipc/name_table.c
View file

@ -416,17 +416,14 @@ static int tipc_publ_sort(void *priv, struct list_head *a,
static void tipc_service_subscribe(struct tipc_service *service,
struct tipc_subscription *sub)
{
struct tipc_subscr *sb = &sub->evt.s;
struct publication *p, *first, *tmp;
struct list_head publ_list;
struct service_range *sr;
struct tipc_service_range r;
u32 filter;
u32 filter, lower, upper;
r.type = tipc_sub_read(sb, seq.type);
r.lower = tipc_sub_read(sb, seq.lower);
r.upper = tipc_sub_read(sb, seq.upper);
filter = tipc_sub_read(sb, filter);
filter = sub->s.filter;
lower = sub->s.seq.lower;
upper = sub->s.seq.upper;
tipc_sub_get(sub);
list_add(&sub->service_list, &service->subscriptions);
@ -435,7 +432,7 @@ static void tipc_service_subscribe(struct tipc_service *service,
return;
INIT_LIST_HEAD(&publ_list);
service_range_foreach_match(sr, service, r.lower, r.upper) {
service_range_foreach_match(sr, service, lower, upper) {
first = NULL;
list_for_each_entry(p, &sr->all_publ, all_publ) {
if (filter & TIPC_SUB_PORTS)
@ -826,14 +823,13 @@ void tipc_nametbl_withdraw(struct net *net, struct tipc_uaddr *ua,
bool tipc_nametbl_subscribe(struct tipc_subscription *sub)
{
struct tipc_net *tn = tipc_net(sub->net);
struct tipc_subscr *s = &sub->evt.s;
u32 type = tipc_sub_read(s, seq.type);
u32 type = sub->s.seq.type;
struct tipc_service *sc;
struct tipc_uaddr ua;
bool res = true;
tipc_uaddr(&ua, TIPC_SERVICE_RANGE, TIPC_NODE_SCOPE, type,
tipc_sub_read(s, seq.lower), tipc_sub_read(s, seq.upper));
sub->s.seq.lower, sub->s.seq.upper);
spin_lock_bh(&tn->nametbl_lock);
sc = tipc_service_find(sub->net, &ua);
if (!sc)
@ -843,9 +839,8 @@ bool tipc_nametbl_subscribe(struct tipc_subscription *sub)
tipc_service_subscribe(sc, sub);
spin_unlock_bh(&sc->lock);
} else {
pr_warn("Failed to subscribe for {%u,%u,%u}\n", type,
tipc_sub_read(s, seq.lower),
tipc_sub_read(s, seq.upper));
pr_warn("Failed to subscribe for {%u,%u,%u}\n",
type, sub->s.seq.lower, sub->s.seq.upper);
res = false;
}
spin_unlock_bh(&tn->nametbl_lock);
@ -859,13 +854,11 @@ bool tipc_nametbl_subscribe(struct tipc_subscription *sub)
void tipc_nametbl_unsubscribe(struct tipc_subscription *sub)
{
struct tipc_net *tn = tipc_net(sub->net);
struct tipc_subscr *s = &sub->evt.s;
u32 type = tipc_sub_read(s, seq.type);
struct tipc_service *sc;
struct tipc_uaddr ua;
tipc_uaddr(&ua, TIPC_SERVICE_RANGE, TIPC_NODE_SCOPE, type,
tipc_sub_read(s, seq.lower), tipc_sub_read(s, seq.upper));
tipc_uaddr(&ua, TIPC_SERVICE_RANGE, TIPC_NODE_SCOPE,
sub->s.seq.type, sub->s.seq.lower, sub->s.seq.upper);
spin_lock_bh(&tn->nametbl_lock);
sc = tipc_service_find(sub->net, &ua);
if (!sc)

45
net/tipc/subscr.c
View file

@ -65,37 +65,32 @@ static void tipc_sub_send_event(struct tipc_subscription *sub,
/**
* tipc_sub_check_overlap - test for subscription overlap with the given values
* @seq: tipc_name_seq to check
* @found_lower: lower value to test
* @found_upper: upper value to test
* @subscribed: the service range subscribed for
* @found: the service range we are checning for match
*
* Returns true if there is overlap, otherwise false.
*/
bool tipc_sub_check_overlap(struct tipc_service_range *sr,
u32 found_lower, u32 found_upper)
static bool tipc_sub_check_overlap(struct tipc_service_range *subscribed,
struct tipc_service_range *found)
{
if (found_lower < sr->lower)
found_lower = sr->lower;
if (found_upper > sr->upper)
found_upper = sr->upper;
if (found_lower > found_upper)
return false;
return true;
u32 found_lower = found->lower;
u32 found_upper = found->upper;
if (found_lower < subscribed->lower)
found_lower = subscribed->lower;
if (found_upper > subscribed->upper)
found_upper = subscribed->upper;
return found_lower <= found_upper;
}
void tipc_sub_report_overlap(struct tipc_subscription *sub,
struct publication *p,
u32 event, bool must)
{
struct tipc_subscr *s = &sub->evt.s;
u32 filter = tipc_sub_read(s, filter);
struct tipc_service_range seq;
struct tipc_service_range *sr = &sub->s.seq;
u32 filter = sub->s.filter;
seq.type = tipc_sub_read(s, seq.type);
seq.lower = tipc_sub_read(s, seq.lower);
seq.upper = tipc_sub_read(s, seq.upper);
if (!tipc_sub_check_overlap(&seq, p->sr.lower, p->sr.upper))
if (!tipc_sub_check_overlap(sr, &p->sr))
return;
if (!must && !(filter & TIPC_SUB_PORTS))
return;
@ -137,12 +132,14 @@ struct tipc_subscription *tipc_sub_subscribe(struct net *net,
struct tipc_subscr *s,
int conid)
{
u32 lower = tipc_sub_read(s, seq.lower);
u32 upper = tipc_sub_read(s, seq.upper);
u32 filter = tipc_sub_read(s, filter);
struct tipc_subscription *sub;
u32 timeout;
if ((filter & TIPC_SUB_PORTS && filter & TIPC_SUB_SERVICE) ||
(tipc_sub_read(s, seq.lower) > tipc_sub_read(s, seq.upper))) {
lower > upper) {
pr_warn("Subscription rejected, illegal request\n");
return NULL;
}
@ -157,6 +154,12 @@ struct tipc_subscription *tipc_sub_subscribe(struct net *net,
sub->conid = conid;
sub->inactive = false;
memcpy(&sub->evt.s, s, sizeof(*s));
sub->s.seq.type = tipc_sub_read(s, seq.type);
sub->s.seq.lower = lower;
sub->s.seq.upper = upper;
sub->s.filter = filter;
sub->s.timeout = tipc_sub_read(s, timeout);
memcpy(sub->s.usr_handle, s->usr_handle, 8);
spin_lock_init(&sub->lock);
kref_init(&sub->kref);
if (!tipc_nametbl_subscribe(sub)) {

3
net/tipc/subscr.h
View file

@ -60,12 +60,13 @@ struct tipc_conn;
* @lock: serialize up/down and timer events
*/
struct tipc_subscription {
struct tipc_subscr s;
struct tipc_event evt;
struct kref kref;
struct net *net;
struct timer_list timer;
struct list_head service_list;
struct list_head sub_list;
struct tipc_event evt;
int conid;
bool inactive;
spinlock_t lock;