Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull scsi target updates from Nicholas Bellinger:
 "The highlights in this series include:

   - Improve sg_table lookup scalability in RAMDISK_MCP (martin)

   - Add device attribute to expose config name for INQUIRY model (tregaron)

   - Convert tcm_vhost to use lock-less list for cmd completion (asias)

   - Add tcm_vhost support for multiple target's per endpoint (asias)

   - Add tcm_vhost support for multiple queues per vhost (asias)

   - Add missing mapped_lun bounds checking during make_mappedlun setup
     in generic fabric configfs code (jan engelhardt + nab)

   - Enforce individual iscsi-target network portal export once per
     TargetName endpoint (grover + nab)

   - Add WRITE_SAME w/ UNMAP=0 emulation to FILEIO backend (nab)

  Things have been mostly quiet this round, with majority of the work
  being done on the iser-target WIP driver + associated iscsi-target
  refactoring patches currently in flight for v3.10 code.

  At this point there is one patch series left outstanding from Asias to
  add support for UNMAP + WRITE_SAME w/ UNMAP=1 to FILEIO awaiting
  feedback from hch & Co, that will likely be included in a post
  v3.9-rc1 PULL request if there are no objections.

  Also, there is a regression bug recently reported off-list that seems
  to be effecting v3.5 and v3.6 kernels with MSFT iSCSI initiators that
  is still being tracked down.  No word if this effects >= v3.7 just
  yet, but if so there will likely another PULL request coming your
  way.."

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (26 commits)
  target: Rename spc_get_write_same_sectors -> sbc_get_write_same_sectors
  target/file: Add WRITE_SAME w/ UNMAP=0 emulation support
  iscsi-target: Enforce individual network portal export once per TargetName
  iscsi-target: Refactor iscsit_get_np sockaddr matching into iscsit_check_np_match
  target: Add missing mapped_lun bounds checking during make_mappedlun setup
  target: Fix lookup of dynamic NodeACLs during cached demo-mode operation
  target: Fix parameter list length checking in MODE SELECT
  target: Fix error checking for UNMAP commands
  target: Fix sense data for out-of-bounds IO operations
  target_core_rd: break out unterminated loop during copy
  tcm_vhost: Multi-queue support
  tcm_vhost: Multi-target support
  target: Add device attribute to expose config_item_name for INQUIRY model
  target: don't truncate the fail intr address
  target: don't always say "ipv6" as address type
  target/iblock: Use backend REQ_FLUSH hint for WriteCacheEnabled status
  iscsi-target: make some temporary buffers larger
  tcm_vhost: Optimize gup in vhost_scsi_map_to_sgl
  tcm_vhost: Use iov_num_pages to calculate sgl_count
  tcm_vhost: Introduce iov_num_pages
  ...

1 files changed, 39 insertions, 26 deletions

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 339f97f7085b..23a98e658306 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -264,16 +264,50 @@ int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg)
 	return 0;
 }
 
-static struct iscsi_np *iscsit_get_np(
+bool iscsit_check_np_match(
 	struct __kernel_sockaddr_storage *sockaddr,
+	struct iscsi_np *np,
 	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;
+	bool ip_match = false;
 	u16 port;
 
+	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 = true;
+
+		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 = true;
+
+		port = ntohs(sock_in->sin_port);
+	}
+
+	if ((ip_match == true) && (np->np_port == port) &&
+	    (np->np_network_transport == network_transport))
+		return true;
+
+	return false;
+}
+
+static struct iscsi_np *iscsit_get_np(
+	struct __kernel_sockaddr_storage *sockaddr,
+	int network_transport)
+{
+	struct iscsi_np *np;
+	bool match;
+
 	spin_lock_bh(&np_lock);
 	list_for_each_entry(np, &g_np_list, np_list) {
 		spin_lock(&np->np_thread_lock);
@@ -282,29 +316,8 @@ static struct iscsi_np *iscsit_get_np(
 			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)) {
+		match = iscsit_check_np_match(sockaddr, np, network_transport);
+		if (match == true) {
 			/*
 			 * Increment the np_exports reference count now to
 			 * prevent iscsit_del_np() below from being called