[PATCH RFC net-next v3 4/8] vsock: make vsock bind reusable
From: Bobby Eshleman <hidden>
Date: 2023-05-31 00:36:03
Also in:
kvm, linux-hyperv, lkml
Subsystem:
networking [general], the rest, vm sockets (af_vsock) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Stefano Garzarella
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 <redacted> --- 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_sock *vsk) sock_put(&vsk->sk); } -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; - 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);
@@ -247,6 +248,11 @@ static struct sock *__vsock_find_bound_socket(struct sockaddr_vm *addr) return NULL; } +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 *work) /**** SOCKET OPERATIONS ****/ -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; + if (table_size < VSOCK_HASH_SIZE) + return -1; + if (!port) port = get_random_u32_above(LAST_RESERVED_PORT);
@@ -664,7 +675,8 @@ static int __vsock_bind_connectible(struct vsock_sock *vsk, new_addr.svm_port = port++; - if (!__vsock_find_bound_socket(&new_addr)) { + if (!vsock_find_bound_socket_common(&new_addr, + &bind_table[VSOCK_HASH(addr)])) { found = true; break; }
@@ -681,7 +693,8 @@ static int __vsock_bind_connectible(struct vsock_sock *vsk, return -EACCES; } - if (__vsock_find_bound_socket(&new_addr)) + if (vsock_find_bound_socket_common(&new_addr, + &bind_table[VSOCK_HASH(addr)])) return -EADDRINUSE; }
@@ -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); return 0; } +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 = __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) {
--
2.30.2