[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 06/13] xen/pvcalls: implement bind command
Send PVCALLS_BIND to the backend. Introduce a new structure, part of struct sock_mapping, to store information specific to passive sockets. Introduce a status field to keep track of the status of the passive socket. Signed-off-by: Stefano Stabellini <stefano@xxxxxxxxxxx> CC: boris.ostrovsky@xxxxxxxxxx CC: jgross@xxxxxxxx --- drivers/xen/pvcalls-front.c | 59 +++++++++++++++++++++++++++++++++++++++++++++ drivers/xen/pvcalls-front.h | 3 +++ 2 files changed, 62 insertions(+) diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index 379b8fb..5ccef34 100644 --- a/drivers/xen/pvcalls-front.c +++ b/drivers/xen/pvcalls-front.c @@ -59,6 +59,13 @@ struct sock_mapping { wait_queue_head_t inflight_conn_req; } active; + struct { + /* Socket status */ +#define PVCALLS_STATUS_UNINITALIZED 0 +#define PVCALLS_STATUS_BIND 1 +#define PVCALLS_STATUS_LISTEN 2 + uint8_t status; + } passive; }; }; @@ -308,6 +315,58 @@ int pvcalls_front_connect(struct socket *sock, struct sockaddr *addr, return ret; } +int pvcalls_front_bind(struct socket *sock, struct sockaddr *addr, int addr_len) +{ + struct pvcalls_bedata *bedata; + struct sock_mapping *map = NULL; + struct xen_pvcalls_request *req; + int notify, req_id, ret; + + if (!pvcalls_front_dev) + return -ENOTCONN; + if (addr->sa_family != AF_INET || sock->type != SOCK_STREAM) + return -ENOTSUPP; + bedata = dev_get_drvdata(&pvcalls_front_dev->dev); + + map = (struct sock_mapping *) READ_ONCE(sock->sk->sk_send_head); + if (map == NULL) + return -EINVAL; + + spin_lock(&bedata->pvcallss_lock); + ret = get_request(bedata, &req_id); + if (ret < 0) { + spin_unlock(&bedata->pvcallss_lock); + return ret; + } + req = RING_GET_REQUEST(&bedata->ring, req_id); + req->req_id = req_id; + map->sock = sock; + req->cmd = PVCALLS_BIND; + req->u.bind.id = (uint64_t) map; + memcpy(req->u.bind.addr, addr, sizeof(*addr)); + req->u.bind.len = addr_len; + + init_waitqueue_head(&map->passive.inflight_accept_req); + + map->active_socket = false; + + bedata->ring.req_prod_pvt++; + RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&bedata->ring, notify); + spin_unlock(&bedata->pvcallss_lock); + if (notify) + notify_remote_via_irq(bedata->irq); + + wait_event(bedata->inflight_req, + READ_ONCE(bedata->rsp[req_id].req_id) == req_id); + + map->passive.status = PVCALLS_STATUS_BIND; + ret = bedata->rsp[req_id].ret; + /* read ret, then set this rsp slot to be reused */ + smp_mb(); + WRITE_ONCE(bedata->rsp[req_id].req_id, PVCALLS_INVALID_ID); + return 0; +} + static const struct xenbus_device_id pvcalls_front_ids[] = { { "pvcalls" }, { "" } diff --git a/drivers/xen/pvcalls-front.h b/drivers/xen/pvcalls-front.h index 63b0417..8b0a274 100644 --- a/drivers/xen/pvcalls-front.h +++ b/drivers/xen/pvcalls-front.h @@ -6,5 +6,8 @@ int pvcalls_front_socket(struct socket *sock); int pvcalls_front_connect(struct socket *sock, struct sockaddr *addr, int addr_len, int flags); +int pvcalls_front_bind(struct socket *sock, + struct sockaddr *addr, + int addr_len); #endif -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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