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tipc: collapse subscription creation functions

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After the previous changes it becomes logical to collapse the two-level
creation of subscription instances into one. We do that here.

We also rename the creation and deletion functions for more consistency.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2018-02-15 10:40:47 +01:00 committed by David S. Miller
parent 8985ecc7c1
commit 242e82cc95
4 changed files with 22 additions and 43 deletions
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4
net/tipc/server.c
View File

@ -203,7 +203,7 @@ static void tipc_con_delete_sub(struct tipc_conn *con, struct tipc_subscr *s)
spin_lock_bh(&con->sub_lock);
list_for_each_entry_safe(sub, tmp, sub_list, subscrp_list) {
if (!s || !memcmp(s, &sub->evt.s, sizeof(*s)))
tipc_sub_delete(sub);
tipc_sub_unsubscribe(sub);
else if (s)
break;
}
@ -278,7 +278,7 @@ static int tipc_con_rcv_sub(struct tipc_server *srv,
tipc_con_delete_sub(con, s);
return 0;
}
sub = tipc_subscrp_subscribe(srv, s, con->conid);
sub = tipc_sub_subscribe(srv, s, con->conid);
if (!sub)
return -1;

1
net/tipc/server.h
View File

@ -2,6 +2,7 @@
* net/tipc/server.h: Include file for TIPC server code
*
* Copyright (c) 2012-2013, Wind River Systems
* Copyright (c) 2017, Ericsson AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without

46
net/tipc/subscr.c
View File

@ -134,33 +134,29 @@ void tipc_subscrp_get(struct tipc_subscription *subscription)
kref_get(&subscription->kref);
}
static struct tipc_subscription *tipc_subscrp_create(struct tipc_server *srv,
struct tipc_subscr *s,
int conid)
struct tipc_subscription *tipc_sub_subscribe(struct tipc_server *srv,
struct tipc_subscr *s,
int conid)
{
struct tipc_net *tn = tipc_net(srv->net);
struct tipc_subscription *sub;
u32 filter = tipc_sub_read(s, filter);
u32 timeout;
/* Refuse subscription if global limit exceeded */
if (atomic_read(&tn->subscription_count) >= TIPC_MAX_SUBSCRIPTIONS) {
pr_warn("Subscription rejected, limit reached (%u)\n",
TIPC_MAX_SUBSCRIPTIONS);
if (atomic_read(&tn->subscription_count) >= TIPC_MAX_SUBSCR) {
pr_warn("Subscription rejected, max (%u)\n", TIPC_MAX_SUBSCR);
return NULL;
}
if ((filter & TIPC_SUB_PORTS && filter & TIPC_SUB_SERVICE) ||
(tipc_sub_read(s, seq.lower) > tipc_sub_read(s, seq.upper))) {
pr_warn("Subscription rejected, illegal request\n");
return NULL;
}
/* Allocate subscription object */
sub = kmalloc(sizeof(*sub), GFP_ATOMIC);
if (!sub) {
pr_warn("Subscription rejected, no memory\n");
return NULL;
}
/* Initialize subscription object */
if (filter & TIPC_SUB_PORTS && filter & TIPC_SUB_SERVICE)
goto err;
if (tipc_sub_read(s, seq.lower) > tipc_sub_read(s, seq.upper))
goto err;
sub->server = srv;
sub->conid = conid;
sub->inactive = false;
@ -168,24 +164,6 @@ static struct tipc_subscription *tipc_subscrp_create(struct tipc_server *srv,
spin_lock_init(&sub->lock);
atomic_inc(&tn->subscription_count);
kref_init(&sub->kref);
return sub;
err:
pr_warn("Subscription rejected, illegal request\n");
kfree(sub);
return NULL;
}
struct tipc_subscription *tipc_subscrp_subscribe(struct tipc_server *srv,
struct tipc_subscr *s,
int conid)
{
struct tipc_subscription *sub = NULL;
u32 timeout;
sub = tipc_subscrp_create(srv, s, conid);
if (!sub)
return NULL;
tipc_nametbl_subscribe(sub);
timer_setup(&sub->timer, tipc_subscrp_timeout, 0);
timeout = tipc_sub_read(&sub->evt.s, timeout);
@ -194,7 +172,7 @@ struct tipc_subscription *tipc_subscrp_subscribe(struct tipc_server *srv,
return sub;
}
void tipc_sub_delete(struct tipc_subscription *sub)
void tipc_sub_unsubscribe(struct tipc_subscription *sub)
{
tipc_nametbl_unsubscribe(sub);
if (sub->evt.s.timeout != TIPC_WAIT_FOREVER)

14
net/tipc/subscr.h
View File

@ -1,7 +1,7 @@
/*
* net/tipc/subscr.h: Include file for TIPC network topology service
*
* Copyright (c) 2003-2006, Ericsson AB
* Copyright (c) 2003-2017, Ericsson AB
* Copyright (c) 2005-2007, 2012-2013, Wind River Systems
* All rights reserved.
*
@ -39,8 +39,8 @@
#include "server.h"
#define TIPC_MAX_SUBSCRIPTIONS 65535
#define TIPC_MAX_PUBLICATIONS 65535
#define TIPC_MAX_SUBSCR 65535
#define TIPC_MAX_PUBLICATIONS 65535
struct tipc_subscription;
struct tipc_conn;
@ -66,10 +66,10 @@ struct tipc_subscription {
spinlock_t lock; /* serialize up/down and timer events */
};
struct tipc_subscription *tipc_subscrp_subscribe(struct tipc_server *srv,
struct tipc_subscr *s,
int conid);
void tipc_sub_delete(struct tipc_subscription *sub);
struct tipc_subscription *tipc_sub_subscribe(struct tipc_server *srv,
struct tipc_subscr *s,
int conid);
void tipc_sub_unsubscribe(struct tipc_subscription *sub);
int tipc_subscrp_check_overlap(struct tipc_name_seq *seq, u32 found_lower,
u32 found_upper);