From: Al Viro <viro@zeniv.linux.org.uk>
To: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
Jakub Kicinski <kuba@kernel.org>,
Denis Kirjanov <kda@linux-powerpc.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Cong Wang <xiyou.wangcong@gmail.com>
Subject: [PATCH 8/8] __unix_find_socket_byname(): don't pass hash and type separately
Date: Mon, 22 Feb 2021 19:12:22 +0000 [thread overview]
Message-ID: <20210222191222.4093800-8-viro@zeniv.linux.org.uk> (raw)
In-Reply-To: <20210222191222.4093800-1-viro@zeniv.linux.org.uk>
We only care about exclusive or of those, so pass that directly.
Makes life simpler for callers as well...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
net/unix/af_unix.c | 23 ++++++++++-------------
1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 8bbdcddbf598..3c1218be7165 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -286,11 +286,11 @@ static inline void unix_insert_socket(struct hlist_head *list, struct sock *sk)
static struct sock *__unix_find_socket_byname(struct net *net,
struct sockaddr_un *sunname,
- int len, int type, unsigned int hash)
+ int len, unsigned int hash)
{
struct sock *s;
- sk_for_each(s, &unix_socket_table[hash ^ type]) {
+ sk_for_each(s, &unix_socket_table[hash]) {
struct unix_sock *u = unix_sk(s);
if (!net_eq(sock_net(s), net))
@@ -305,13 +305,12 @@ static struct sock *__unix_find_socket_byname(struct net *net,
static inline struct sock *unix_find_socket_byname(struct net *net,
struct sockaddr_un *sunname,
- int len, int type,
- unsigned int hash)
+ int len, unsigned int hash)
{
struct sock *s;
spin_lock(&unix_table_lock);
- s = __unix_find_socket_byname(net, sunname, len, type, hash);
+ s = __unix_find_socket_byname(net, sunname, len, hash);
if (s)
sock_hold(s);
spin_unlock(&unix_table_lock);
@@ -898,12 +897,12 @@ static int unix_autobind(struct socket *sock)
retry:
addr->len = sprintf(addr->name->sun_path+1, "%05x", ordernum) + 1 + sizeof(short);
addr->hash = unix_hash_fold(csum_partial(addr->name, addr->len, 0));
+ addr->hash ^= sk->sk_type;
spin_lock(&unix_table_lock);
ordernum = (ordernum+1)&0xFFFFF;
- if (__unix_find_socket_byname(net, addr->name, addr->len, sock->type,
- addr->hash)) {
+ if (__unix_find_socket_byname(net, addr->name, addr->len, addr->hash)) {
spin_unlock(&unix_table_lock);
/*
* __unix_find_socket_byname() may take long time if many names
@@ -918,7 +917,6 @@ static int unix_autobind(struct socket *sock)
}
goto retry;
}
- addr->hash ^= sk->sk_type;
__unix_set_addr(sk, addr, addr->hash);
spin_unlock(&unix_table_lock);
@@ -965,7 +963,7 @@ static struct sock *unix_find_other(struct net *net,
}
} else {
err = -ECONNREFUSED;
- u = unix_find_socket_byname(net, sunname, len, type, hash);
+ u = unix_find_socket_byname(net, sunname, len, type ^ hash);
if (u) {
struct dentry *dentry;
dentry = unix_sk(u)->path.dentry;
@@ -1036,8 +1034,7 @@ static int unix_bind_bsd(struct sock *sk, struct unix_address *addr)
return err;
}
-static int unix_bind_abstract(struct sock *sk, unsigned hash,
- struct unix_address *addr)
+static int unix_bind_abstract(struct sock *sk, struct unix_address *addr)
{
struct unix_sock *u = unix_sk(sk);
int err;
@@ -1053,7 +1050,7 @@ static int unix_bind_abstract(struct sock *sk, unsigned hash,
spin_lock(&unix_table_lock);
if (__unix_find_socket_byname(sock_net(sk), addr->name, addr->len,
- sk->sk_type, hash)) {
+ addr->hash)) {
spin_unlock(&unix_table_lock);
mutex_unlock(&u->bindlock);
return -EADDRINUSE;
@@ -1096,7 +1093,7 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
if (sun_path[0])
err = unix_bind_bsd(sk, addr);
else
- err = unix_bind_abstract(sk, hash, addr);
+ err = unix_bind_abstract(sk, addr);
if (err)
unix_release_addr(addr);
return err == -EEXIST ? -EADDRINUSE : err;
--
2.11.0
next prev parent reply other threads:[~2021-02-22 19:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210129131855.GA2346744@infradead.org>
[not found] ` <YClpVIfHYyzd6EWu@zeniv-ca.linux.org.uk>
[not found] ` <CAOJe8K00srtuD+VAJOFcFepOqgNUm0mC8C=hLq2=qhUFSfhpuw@mail.gmail.com>
[not found] ` <YCwIQmsxWxuw+dnt@zeniv-ca.linux.org.uk>
[not found] ` <YC86WeSTkYZqRlJY@zeniv-ca.linux.org.uk>
[not found] ` <YC88acS6dN6cU1y0@zeniv-ca.linux.org.uk>
[not found] ` <CAM_iQpVpJwRNKjKo3p1jFvCjYAXAY83ux09rd2Mt0hKmvx=RgQ@mail.gmail.com>
[not found] ` <YDFj3OZ4DMQSqylH@zeniv-ca.linux.org.uk>
[not found] ` <CAM_iQpXX7SBGgUkBUY6BEjCqJYbHAUW5Z3VtV2U=yhiw1YJr=w@mail.gmail.com>
[not found] ` <YDF6Z8QHh3yw7es9@zeniv-ca.linux.org.uk>
2021-02-22 19:06 ` [PATCHSET] making unix_bind() undo mknod on failure Al Viro
2021-02-22 19:12 ` [PATCH 1/8] af_unix: take address assignment/hash insertion into a new helper Al Viro
2021-02-22 19:12 ` [PATCH 2/8] unix_bind(): allocate addr earlier Al Viro
2021-02-22 19:12 ` [PATCH 3/8] unix_bind(): separate BSD and abstract cases Al Viro
2021-02-22 19:12 ` [PATCH 4/8] unix_bind(): take BSD and abstract address cases into new helpers Al Viro
2021-02-22 19:12 ` [PATCH 5/8] fold unix_mknod() into unix_bind_bsd() Al Viro
2021-02-22 19:12 ` [PATCH 6/8] unix_bind_bsd(): move done_path_create() call after dealing with ->bindlock Al Viro
2021-02-22 19:12 ` [PATCH 7/8] unix_bind_bsd(): unlink if we fail after successful mknod Al Viro
2021-02-22 19:12 ` Al Viro [this message]
2021-02-22 19:12 ` [PATCHSET] making unix_bind() undo mknod on failure Al Viro
2021-02-22 19:24 ` Al Viro
2021-02-24 0:40 ` Jakub Kicinski
2021-06-19 3:48 [PATCHSET] AF_UNIX bind(2) cleanup on failures after mknod Al Viro
2021-06-19 3:50 ` [PATCH 1/8] af_unix: take address assignment/hash insertion into a new helper Al Viro
2021-06-19 3:50 ` [PATCH 8/8] __unix_find_socket_byname(): don't pass hash and type separately Al Viro
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