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authorJon Maloy <jmaloy@redhat.com>2020-11-25 21:29:13 +0300
committerJakub Kicinski <kuba@kernel.org>2020-11-28 04:34:01 +0300
commit60c102eedea0e487c897dd23cc7fefecf4449769 (patch)
treeb308bcd3e3bde66c55e312c6db66a57d8318b0d4 /net/tipc
parentfff4c74690018c4f741d1ae68c2ba2143b66844a (diff)
downloadlinux-60c102eedea0e487c897dd23cc7fefecf4449769.tar.xz
tipc: refactor tipc_sk_bind() function
We refactor the tipc_sk_bind() function, so that the lock handling is handled separately from the logics. We also move some sanity tests to earlier in the call chain, to the function tipc_bind(). Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/socket.c66
1 files changed, 30 insertions, 36 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 69c4b16e8184..2b633463f40d 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1,8 +1,9 @@
/*
* net/tipc/socket.c: TIPC socket API
*
- * Copyright (c) 2001-2007, 2012-2017, Ericsson AB
+ * Copyright (c) 2001-2007, 2012-2019, Ericsson AB
* Copyright (c) 2004-2008, 2010-2013, Wind River Systems
+ * Copyright (c) 2020, Red Hat Inc
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -644,10 +645,10 @@ static int tipc_release(struct socket *sock)
}
/**
- * tipc_bind - associate or disassocate TIPC name(s) with a socket
+ * __tipc_bind - associate or disassocate TIPC name(s) with a socket
* @sock: socket structure
- * @uaddr: socket address describing name(s) and desired operation
- * @uaddr_len: size of socket address data structure
+ * @skaddr: socket address describing name(s) and desired operation
+ * @alen: size of socket address data structure
*
* Name and name sequence binding is indicated using a positive scope value;
* a negative scope value unbinds the specified name. Specifying no name
@@ -658,44 +659,33 @@ static int tipc_release(struct socket *sock)
* NOTE: This routine doesn't need to take the socket lock since it doesn't
* access any non-constant socket information.
*/
-
-int tipc_sk_bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len)
+static int __tipc_bind(struct socket *sock, struct sockaddr *skaddr, int alen)
{
- struct sock *sk = sock->sk;
- struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
- struct tipc_sock *tsk = tipc_sk(sk);
- int res = -EINVAL;
+ struct sockaddr_tipc *addr = (struct sockaddr_tipc *)skaddr;
+ struct tipc_sock *tsk = tipc_sk(sock->sk);
- lock_sock(sk);
- if (unlikely(!uaddr_len)) {
- res = tipc_sk_withdraw(tsk, 0, NULL);
- goto exit;
- }
- if (tsk->group) {
- res = -EACCES;
- goto exit;
- }
- if (uaddr_len < sizeof(struct sockaddr_tipc)) {
- res = -EINVAL;
- goto exit;
- }
- if (addr->family != AF_TIPC) {
- res = -EAFNOSUPPORT;
- goto exit;
- }
+ if (unlikely(!alen))
+ return tipc_sk_withdraw(tsk, 0, NULL);
if (addr->addrtype == TIPC_ADDR_NAME)
addr->addr.nameseq.upper = addr->addr.nameseq.lower;
- else if (addr->addrtype != TIPC_ADDR_NAMESEQ) {
- res = -EAFNOSUPPORT;
- goto exit;
- }
- res = (addr->scope >= 0) ?
- tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) :
- tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq);
-exit:
- release_sock(sk);
+ if (tsk->group)
+ return -EACCES;
+
+ if (addr->scope >= 0)
+ return tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq);
+ else
+ return tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq);
+}
+
+int tipc_sk_bind(struct socket *sock, struct sockaddr *skaddr, int alen)
+{
+ int res;
+
+ lock_sock(sock->sk);
+ res = __tipc_bind(sock, skaddr, alen);
+ release_sock(sock->sk);
return res;
}
@@ -706,6 +696,10 @@ static int tipc_bind(struct socket *sock, struct sockaddr *skaddr, int alen)
if (alen) {
if (alen < sizeof(struct sockaddr_tipc))
return -EINVAL;
+ if (addr->family != AF_TIPC)
+ return -EAFNOSUPPORT;
+ if (addr->addrtype > TIPC_SERVICE_ADDR)
+ return -EAFNOSUPPORT;
if (addr->addr.nameseq.type < TIPC_RESERVED_TYPES) {
pr_warn_once("Can't bind to reserved service type %u\n",
addr->addr.nameseq.type);