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Subject[PATCH 1/8] af_unix: take address assignment/hash insertion into a new helper
Date
Duplicated logics in all bind variants (autobind, bind-to-path,
bind-to-abstract) gets taken into a common helper.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
net/unix/af_unix.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 41c3303c3357..45a40cf7b6af 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -262,6 +262,14 @@ static void __unix_insert_socket(struct hlist_head *list, struct sock *sk)
sk_add_node(sk, list);
}

+static void __unix_set_addr(struct sock *sk, struct unix_address *addr,
+ unsigned hash)
+{
+ __unix_remove_socket(sk);
+ smp_store_release(&unix_sk(sk)->addr, addr);
+ __unix_insert_socket(&unix_socket_table[hash], sk);
+}
+
static inline void unix_remove_socket(struct sock *sk)
{
spin_lock(&unix_table_lock);
@@ -912,9 +920,7 @@ static int unix_autobind(struct socket *sock)
}
addr->hash ^= sk->sk_type;

- __unix_remove_socket(sk);
- smp_store_release(&u->addr, addr);
- __unix_insert_socket(&unix_socket_table[addr->hash], sk);
+ __unix_set_addr(sk, addr, addr->hash);
spin_unlock(&unix_table_lock);
err = 0;

@@ -1016,7 +1022,6 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
int err;
unsigned int hash;
struct unix_address *addr;
- struct hlist_head *list;
struct path path = { };

err = -EINVAL;
@@ -1068,25 +1073,20 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
hash = d_backing_inode(path.dentry)->i_ino & (UNIX_HASH_SIZE - 1);
spin_lock(&unix_table_lock);
u->path = path;
- list = &unix_socket_table[hash];
} else {
spin_lock(&unix_table_lock);
err = -EADDRINUSE;
if (__unix_find_socket_byname(net, sunaddr, addr_len,
sk->sk_type, hash)) {
+ spin_unlock(&unix_table_lock);
unix_release_addr(addr);
- goto out_unlock;
+ goto out_up;
}
-
- list = &unix_socket_table[addr->hash];
+ hash = addr->hash;
}

err = 0;
- __unix_remove_socket(sk);
- smp_store_release(&u->addr, addr);
- __unix_insert_socket(list, sk);
-
-out_unlock:
+ __unix_set_addr(sk, addr, hash);
spin_unlock(&unix_table_lock);
out_up:
mutex_unlock(&u->bindlock);
--
2.11.0
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