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[67.170.131.147]) by smtp.gmail.com with ESMTPSA id j12-20020a62b60c000000b0064cb0845c77sm2151340pff.122.2023.05.30.17.35.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 May 2023 17:35:12 -0700 (PDT) From: Bobby Eshleman Date: Wed, 31 May 2023 00:35:08 +0000 Subject: [PATCH RFC net-next v3 4/8] vsock: make vsock bind reusable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230413-b4-vsock-dgram-v3-4-c2414413ef6a@bytedance.com> References: <20230413-b4-vsock-dgram-v3-0-c2414413ef6a@bytedance.com> In-Reply-To: <20230413-b4-vsock-dgram-v3-0-c2414413ef6a@bytedance.com> To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Bryan Tan , Vishnu Dasa , VMware PV-Drivers Reviewers Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, Bobby Eshleman X-Mailer: b4 0.12.2 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This commit makes the bind table management functions in vsock usable for different bind tables. For use by datagrams in a future patch. Signed-off-by: Bobby Eshleman --- net/vmw_vsock/af_vsock.c | 46 +++++++++++++++++++++++++++++++++++++++-----= -- 1 file changed, 39 insertions(+), 7 deletions(-) diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 578272a987be..ed02a5592e43 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -230,11 +230,12 @@ static void __vsock_remove_connected(struct vsock_soc= k *vsk) sock_put(&vsk->sk); } =20 -static struct sock *__vsock_find_bound_socket(struct sockaddr_vm *addr) +struct sock *vsock_find_bound_socket_common(struct sockaddr_vm *addr, + struct list_head *bind_table) { struct vsock_sock *vsk; =20 - list_for_each_entry(vsk, vsock_bound_sockets(addr), bound_table) { + list_for_each_entry(vsk, bind_table, bound_table) { if (vsock_addr_equals_addr(addr, &vsk->local_addr)) return sk_vsock(vsk); =20 @@ -247,6 +248,11 @@ static struct sock *__vsock_find_bound_socket(struct s= ockaddr_vm *addr) return NULL; } =20 +static struct sock *__vsock_find_bound_socket(struct sockaddr_vm *addr) +{ + return vsock_find_bound_socket_common(addr, vsock_bound_sockets(addr)); +} + static struct sock *__vsock_find_connected_socket(struct sockaddr_vm *src, struct sockaddr_vm *dst) { @@ -643,12 +649,17 @@ static void vsock_pending_work(struct work_struct *wo= rk) =20 /**** SOCKET OPERATIONS ****/ =20 -static int __vsock_bind_connectible(struct vsock_sock *vsk, - struct sockaddr_vm *addr) +int vsock_bind_common(struct vsock_sock *vsk, + struct sockaddr_vm *addr, + struct list_head *bind_table, + size_t table_size) { static u32 port; struct sockaddr_vm new_addr; =20 + if (table_size < VSOCK_HASH_SIZE) + return -1; + if (!port) port =3D get_random_u32_above(LAST_RESERVED_PORT); =20 @@ -664,7 +675,8 @@ static int __vsock_bind_connectible(struct vsock_sock *= vsk, =20 new_addr.svm_port =3D port++; =20 - if (!__vsock_find_bound_socket(&new_addr)) { + if (!vsock_find_bound_socket_common(&new_addr, + &bind_table[VSOCK_HASH(addr)])) { found =3D true; break; } @@ -681,7 +693,8 @@ static int __vsock_bind_connectible(struct vsock_sock *= vsk, return -EACCES; } =20 - if (__vsock_find_bound_socket(&new_addr)) + if (vsock_find_bound_socket_common(&new_addr, + &bind_table[VSOCK_HASH(addr)])) return -EADDRINUSE; } =20 @@ -693,11 +706,30 @@ static int __vsock_bind_connectible(struct vsock_sock= *vsk, * by AF_UNIX. */ __vsock_remove_bound(vsk); - __vsock_insert_bound(vsock_bound_sockets(&vsk->local_addr), vsk); + __vsock_insert_bound(&bind_table[VSOCK_HASH(&vsk->local_addr)], vsk); =20 return 0; } =20 +static int __vsock_bind_connectible(struct vsock_sock *vsk, + struct sockaddr_vm *addr) +{ + return vsock_bind_common(vsk, addr, vsock_bind_table, VSOCK_HASH_SIZE + 1= ); +} + +int vsock_bind_stream(struct vsock_sock *vsk, + struct sockaddr_vm *addr) +{ + int retval; + + spin_lock_bh(&vsock_table_lock); + retval =3D __vsock_bind_connectible(vsk, addr); + spin_unlock_bh(&vsock_table_lock); + + return retval; +} +EXPORT_SYMBOL(vsock_bind_stream); + static int __vsock_bind_dgram(struct vsock_sock *vsk, struct sockaddr_vm *addr) { --=20 2.30.2