netdev - [PATCH] Don't allow multiple TPGs or targets to share a portal

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Message-Id: <1360364708-26104-1-git-send-email-agrover@redhat.com>
Date:	Fri,  8 Feb 2013 15:05:08 -0800
From:	Andy Grover <agrover@...hat.com>
To:	target-devel@...r.kernel.org
Cc:	netdev@...r.kernel.org
Subject: [PATCH] Don't allow multiple TPGs or targets to share a portal

RFC 3720 says "Each Network Portal, as utilized by a given iSCSI Node,
belongs to exactly one portal group within that node." therefore
iscsit_add_np should not check for existing matching portals, it should
just go ahead and try to make the portal, and then kernel_bind() will
return the proper error.

Signed-off-by: Andy Grover <agrover@...hat.com>
---
 drivers/target/iscsi/iscsi_target.c |   64 -----------------------------------
 1 files changed, 0 insertions(+), 64 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 339f97f..73be05c 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -264,64 +264,6 @@ int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg)
 	return 0;
 }
 
-static struct iscsi_np *iscsit_get_np(
-	struct __kernel_sockaddr_storage *sockaddr,
-	int network_transport)
-{
-	struct sockaddr_in *sock_in, *sock_in_e;
-	struct sockaddr_in6 *sock_in6, *sock_in6_e;
-	struct iscsi_np *np;
-	int ip_match = 0;
-	u16 port;
-
-	spin_lock_bh(&np_lock);
-	list_for_each_entry(np, &g_np_list, np_list) {
-		spin_lock(&np->np_thread_lock);
-		if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
-			spin_unlock(&np->np_thread_lock);
-			continue;
-		}
-
-		if (sockaddr->ss_family == AF_INET6) {
-			sock_in6 = (struct sockaddr_in6 *)sockaddr;
-			sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr;
-
-			if (!memcmp(&sock_in6->sin6_addr.in6_u,
-				    &sock_in6_e->sin6_addr.in6_u,
-				    sizeof(struct in6_addr)))
-				ip_match = 1;
-
-			port = ntohs(sock_in6->sin6_port);
-		} else {
-			sock_in = (struct sockaddr_in *)sockaddr;
-			sock_in_e = (struct sockaddr_in *)&np->np_sockaddr;
-
-			if (sock_in->sin_addr.s_addr ==
-			    sock_in_e->sin_addr.s_addr)
-				ip_match = 1;
-
-			port = ntohs(sock_in->sin_port);
-		}
-
-		if ((ip_match == 1) && (np->np_port == port) &&
-		    (np->np_network_transport == network_transport)) {
-			/*
-			 * Increment the np_exports reference count now to
-			 * prevent iscsit_del_np() below from being called
-			 * while iscsi_tpg_add_network_portal() is called.
-			 */
-			np->np_exports++;
-			spin_unlock(&np->np_thread_lock);
-			spin_unlock_bh(&np_lock);
-			return np;
-		}
-		spin_unlock(&np->np_thread_lock);
-	}
-	spin_unlock_bh(&np_lock);
-
-	return NULL;
-}
-
 struct iscsi_np *iscsit_add_np(
 	struct __kernel_sockaddr_storage *sockaddr,
 	char *ip_str,
@@ -331,12 +273,6 @@ struct iscsi_np *iscsit_add_np(
 	struct sockaddr_in6 *sock_in6;
 	struct iscsi_np *np;
 	int ret;
-	/*
-	 * Locate the existing struct iscsi_np if already active..
-	 */
-	np = iscsit_get_np(sockaddr, network_transport);
-	if (np)
-		return np;
 
 	np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL);
 	if (!np) {
-- 
1.7.1

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