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Commit c422f1bd authored by Allan Stephens's avatar Allan Stephens Committed by Paul Gortmaker
Browse files

tipc: Simplify enforcement of reserved name type prohibition 



Streamlines the logic that prevents an application from binding a
reserved TIPC name type to a port by moving the check to the code
that handles a socket bind() operation. This allows internal TIPC
subsystems to bind a reserved name without having to set an atomic
flag to gain permission to use such a name. (This simplification is
now possible due to the elimination of support for TIPC's native API.)

Signed-off-by: default avatarAllan Stephens <allan.stephens@windriver.com>
Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
parent c74a4611

net/tipc/config.c

+1 −1
Original line number Diff line number Diff line
@@ -481,7 +481,7 @@ int tipc_cfg_init(void) 


	seq.type = TIPC_CFG_SRV;

	seq.lower = seq.upper = tipc_own_addr;

	res = tipc_nametbl_publish_rsv(config_port_ref, TIPC_ZONE_SCOPE, &seq);

	res = tipc_publish(config_port_ref, TIPC_ZONE_SCOPE, &seq);

	if (res)

		goto failed;

net/tipc/name_table.c

+1 −23
Original line number Diff line number Diff line
@@ -114,10 +114,8 @@ struct name_table { 
};



static struct name_table table;

static atomic_t rsv_publ_ok = ATOMIC_INIT(0);

DEFINE_RWLOCK(tipc_nametbl_lock);





static int hash(int x)

{

	return x & (tipc_nametbl_size - 1);
@@ -665,22 +663,7 @@ int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit, 
	return res;

}



/**

 * tipc_nametbl_publish_rsv - publish port name using a reserved name type

 */



int tipc_nametbl_publish_rsv(u32 ref, unsigned int scope,

			struct tipc_name_seq const *seq)

{

	int res;



	atomic_inc(&rsv_publ_ok);

	res = tipc_publish(ref, scope, seq);

	atomic_dec(&rsv_publ_ok);

	return res;

}



/**

/*

 * tipc_nametbl_publish - add name publication to network name tables

 */
@@ -694,11 +677,6 @@ struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper, 
		     tipc_max_publications);

		return NULL;

	}

	if ((type < TIPC_RESERVED_TYPES) && !atomic_read(&rsv_publ_ok)) {

		warn("Publication failed, reserved name {%u,%u,%u}\n",

		     type, lower, upper);

		return NULL;

	}



	write_lock_bh(&tipc_nametbl_lock);

	table.local_publ_count++;

net/tipc/name_table.h

+0 −2
Original line number Diff line number Diff line
@@ -91,8 +91,6 @@ struct sk_buff *tipc_nametbl_get(const void *req_tlv_area, int req_tlv_space); 
u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *node);

int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit,

			 struct tipc_port_list *dports);

int tipc_nametbl_publish_rsv(u32 ref, unsigned int scope,

			struct tipc_name_seq const *seq);

struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,

				    u32 scope, u32 port_ref, u32 key);

int tipc_nametbl_withdraw(u32 type, u32 lower, u32 ref, u32 key);

net/tipc/socket.c

+3 −0
Original line number Diff line number Diff line
@@ -355,6 +355,9 @@ static int bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len) 
	else if (addr->addrtype != TIPC_ADDR_NAMESEQ)

		return -EAFNOSUPPORT;



	if (addr->addr.nameseq.type < TIPC_RESERVED_TYPES)

		return -EACCES;



	return (addr->scope > 0) ?

		tipc_publish(portref, addr->scope, &addr->addr.nameseq) :

		tipc_withdraw(portref, -addr->scope, &addr->addr.nameseq);

net/tipc/subscr.c

+1 −1
Original line number Diff line number Diff line
@@ -552,7 +552,7 @@ int tipc_subscr_start(void) 
	if (res)

		goto failed;



	res = tipc_nametbl_publish_rsv(topsrv.setup_port, TIPC_NODE_SCOPE, &seq);

	res = tipc_publish(topsrv.setup_port, TIPC_NODE_SCOPE, &seq);

	if (res) {

		tipc_deleteport(topsrv.setup_port);

		topsrv.setup_port = 0;