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963 lines
23 KiB
963 lines
23 KiB
/* |
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* Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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* |
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*/ |
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#include <linux/module.h> |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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#include <linux/gfp.h> |
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#include <linux/in.h> |
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#include <linux/ipv6.h> |
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#include <linux/poll.h> |
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#include <net/sock.h> |
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|
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#include "rds.h" |
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|
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/* this is just used for stats gathering :/ */ |
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static DEFINE_SPINLOCK(rds_sock_lock); |
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static unsigned long rds_sock_count; |
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static LIST_HEAD(rds_sock_list); |
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DECLARE_WAIT_QUEUE_HEAD(rds_poll_waitq); |
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|
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/* |
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* This is called as the final descriptor referencing this socket is closed. |
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* We have to unbind the socket so that another socket can be bound to the |
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* address it was using. |
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* |
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* We have to be careful about racing with the incoming path. sock_orphan() |
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* sets SOCK_DEAD and we use that as an indicator to the rx path that new |
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* messages shouldn't be queued. |
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*/ |
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static int rds_release(struct socket *sock) |
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{ |
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struct sock *sk = sock->sk; |
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struct rds_sock *rs; |
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|
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if (!sk) |
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goto out; |
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|
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rs = rds_sk_to_rs(sk); |
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|
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sock_orphan(sk); |
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/* Note - rds_clear_recv_queue grabs rs_recv_lock, so |
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* that ensures the recv path has completed messing |
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* with the socket. */ |
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rds_clear_recv_queue(rs); |
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rds_cong_remove_socket(rs); |
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|
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rds_remove_bound(rs); |
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|
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rds_send_drop_to(rs, NULL); |
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rds_rdma_drop_keys(rs); |
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rds_notify_queue_get(rs, NULL); |
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rds_notify_msg_zcopy_purge(&rs->rs_zcookie_queue); |
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|
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spin_lock_bh(&rds_sock_lock); |
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list_del_init(&rs->rs_item); |
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rds_sock_count--; |
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spin_unlock_bh(&rds_sock_lock); |
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|
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rds_trans_put(rs->rs_transport); |
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|
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sock->sk = NULL; |
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sock_put(sk); |
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out: |
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return 0; |
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} |
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|
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/* |
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* Careful not to race with rds_release -> sock_orphan which clears sk_sleep. |
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* _bh() isn't OK here, we're called from interrupt handlers. It's probably OK |
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* to wake the waitqueue after sk_sleep is clear as we hold a sock ref, but |
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* this seems more conservative. |
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* NB - normally, one would use sk_callback_lock for this, but we can |
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* get here from interrupts, whereas the network code grabs sk_callback_lock |
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* with _lock_bh only - so relying on sk_callback_lock introduces livelocks. |
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*/ |
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void rds_wake_sk_sleep(struct rds_sock *rs) |
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{ |
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unsigned long flags; |
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|
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read_lock_irqsave(&rs->rs_recv_lock, flags); |
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__rds_wake_sk_sleep(rds_rs_to_sk(rs)); |
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read_unlock_irqrestore(&rs->rs_recv_lock, flags); |
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} |
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|
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static int rds_getname(struct socket *sock, struct sockaddr *uaddr, |
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int peer) |
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{ |
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struct rds_sock *rs = rds_sk_to_rs(sock->sk); |
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struct sockaddr_in6 *sin6; |
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struct sockaddr_in *sin; |
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int uaddr_len; |
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|
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/* racey, don't care */ |
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if (peer) { |
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if (ipv6_addr_any(&rs->rs_conn_addr)) |
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return -ENOTCONN; |
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|
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if (ipv6_addr_v4mapped(&rs->rs_conn_addr)) { |
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sin = (struct sockaddr_in *)uaddr; |
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memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
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sin->sin_family = AF_INET; |
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sin->sin_port = rs->rs_conn_port; |
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sin->sin_addr.s_addr = rs->rs_conn_addr_v4; |
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uaddr_len = sizeof(*sin); |
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} else { |
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sin6 = (struct sockaddr_in6 *)uaddr; |
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sin6->sin6_family = AF_INET6; |
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sin6->sin6_port = rs->rs_conn_port; |
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sin6->sin6_addr = rs->rs_conn_addr; |
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sin6->sin6_flowinfo = 0; |
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/* scope_id is the same as in the bound address. */ |
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sin6->sin6_scope_id = rs->rs_bound_scope_id; |
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uaddr_len = sizeof(*sin6); |
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} |
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} else { |
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/* If socket is not yet bound and the socket is connected, |
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* set the return address family to be the same as the |
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* connected address, but with 0 address value. If it is not |
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* connected, set the family to be AF_UNSPEC (value 0) and |
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* the address size to be that of an IPv4 address. |
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*/ |
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if (ipv6_addr_any(&rs->rs_bound_addr)) { |
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if (ipv6_addr_any(&rs->rs_conn_addr)) { |
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sin = (struct sockaddr_in *)uaddr; |
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memset(sin, 0, sizeof(*sin)); |
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sin->sin_family = AF_UNSPEC; |
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return sizeof(*sin); |
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} |
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#if IS_ENABLED(CONFIG_IPV6) |
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if (!(ipv6_addr_type(&rs->rs_conn_addr) & |
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IPV6_ADDR_MAPPED)) { |
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sin6 = (struct sockaddr_in6 *)uaddr; |
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memset(sin6, 0, sizeof(*sin6)); |
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sin6->sin6_family = AF_INET6; |
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return sizeof(*sin6); |
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} |
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#endif |
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sin = (struct sockaddr_in *)uaddr; |
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memset(sin, 0, sizeof(*sin)); |
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sin->sin_family = AF_INET; |
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return sizeof(*sin); |
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} |
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if (ipv6_addr_v4mapped(&rs->rs_bound_addr)) { |
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sin = (struct sockaddr_in *)uaddr; |
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memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
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sin->sin_family = AF_INET; |
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sin->sin_port = rs->rs_bound_port; |
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sin->sin_addr.s_addr = rs->rs_bound_addr_v4; |
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uaddr_len = sizeof(*sin); |
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} else { |
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sin6 = (struct sockaddr_in6 *)uaddr; |
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sin6->sin6_family = AF_INET6; |
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sin6->sin6_port = rs->rs_bound_port; |
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sin6->sin6_addr = rs->rs_bound_addr; |
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sin6->sin6_flowinfo = 0; |
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sin6->sin6_scope_id = rs->rs_bound_scope_id; |
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uaddr_len = sizeof(*sin6); |
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} |
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} |
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return uaddr_len; |
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} |
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|
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/* |
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* RDS' poll is without a doubt the least intuitive part of the interface, |
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* as EPOLLIN and EPOLLOUT do not behave entirely as you would expect from |
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* a network protocol. |
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* |
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* EPOLLIN is asserted if |
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* - there is data on the receive queue. |
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* - to signal that a previously congested destination may have become |
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* uncongested |
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* - A notification has been queued to the socket (this can be a congestion |
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* update, or a RDMA completion, or a MSG_ZEROCOPY completion). |
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* |
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* EPOLLOUT is asserted if there is room on the send queue. This does not mean |
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* however, that the next sendmsg() call will succeed. If the application tries |
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* to send to a congested destination, the system call may still fail (and |
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* return ENOBUFS). |
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*/ |
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static __poll_t rds_poll(struct file *file, struct socket *sock, |
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poll_table *wait) |
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{ |
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struct sock *sk = sock->sk; |
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struct rds_sock *rs = rds_sk_to_rs(sk); |
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__poll_t mask = 0; |
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unsigned long flags; |
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poll_wait(file, sk_sleep(sk), wait); |
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if (rs->rs_seen_congestion) |
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poll_wait(file, &rds_poll_waitq, wait); |
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read_lock_irqsave(&rs->rs_recv_lock, flags); |
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if (!rs->rs_cong_monitor) { |
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/* When a congestion map was updated, we signal EPOLLIN for |
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* "historical" reasons. Applications can also poll for |
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* WRBAND instead. */ |
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if (rds_cong_updated_since(&rs->rs_cong_track)) |
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mask |= (EPOLLIN | EPOLLRDNORM | EPOLLWRBAND); |
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} else { |
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spin_lock(&rs->rs_lock); |
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if (rs->rs_cong_notify) |
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mask |= (EPOLLIN | EPOLLRDNORM); |
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spin_unlock(&rs->rs_lock); |
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} |
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if (!list_empty(&rs->rs_recv_queue) || |
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!list_empty(&rs->rs_notify_queue) || |
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!list_empty(&rs->rs_zcookie_queue.zcookie_head)) |
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mask |= (EPOLLIN | EPOLLRDNORM); |
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if (rs->rs_snd_bytes < rds_sk_sndbuf(rs)) |
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mask |= (EPOLLOUT | EPOLLWRNORM); |
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if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) |
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mask |= POLLERR; |
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read_unlock_irqrestore(&rs->rs_recv_lock, flags); |
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|
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/* clear state any time we wake a seen-congested socket */ |
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if (mask) |
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rs->rs_seen_congestion = 0; |
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return mask; |
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} |
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static int rds_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
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{ |
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struct rds_sock *rs = rds_sk_to_rs(sock->sk); |
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rds_tos_t utos, tos = 0; |
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|
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switch (cmd) { |
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case SIOCRDSSETTOS: |
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if (get_user(utos, (rds_tos_t __user *)arg)) |
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return -EFAULT; |
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|
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if (rs->rs_transport && |
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rs->rs_transport->get_tos_map) |
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tos = rs->rs_transport->get_tos_map(utos); |
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else |
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return -ENOIOCTLCMD; |
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spin_lock_bh(&rds_sock_lock); |
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if (rs->rs_tos || rs->rs_conn) { |
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spin_unlock_bh(&rds_sock_lock); |
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return -EINVAL; |
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} |
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rs->rs_tos = tos; |
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spin_unlock_bh(&rds_sock_lock); |
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break; |
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case SIOCRDSGETTOS: |
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spin_lock_bh(&rds_sock_lock); |
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tos = rs->rs_tos; |
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spin_unlock_bh(&rds_sock_lock); |
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if (put_user(tos, (rds_tos_t __user *)arg)) |
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return -EFAULT; |
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break; |
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default: |
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return -ENOIOCTLCMD; |
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} |
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return 0; |
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} |
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static int rds_cancel_sent_to(struct rds_sock *rs, sockptr_t optval, int len) |
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{ |
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struct sockaddr_in6 sin6; |
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struct sockaddr_in sin; |
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int ret = 0; |
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|
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/* racing with another thread binding seems ok here */ |
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if (ipv6_addr_any(&rs->rs_bound_addr)) { |
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ret = -ENOTCONN; /* XXX not a great errno */ |
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goto out; |
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} |
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|
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if (len < sizeof(struct sockaddr_in)) { |
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ret = -EINVAL; |
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goto out; |
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} else if (len < sizeof(struct sockaddr_in6)) { |
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/* Assume IPv4 */ |
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if (copy_from_sockptr(&sin, optval, |
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sizeof(struct sockaddr_in))) { |
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ret = -EFAULT; |
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goto out; |
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} |
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ipv6_addr_set_v4mapped(sin.sin_addr.s_addr, &sin6.sin6_addr); |
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sin6.sin6_port = sin.sin_port; |
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} else { |
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if (copy_from_sockptr(&sin6, optval, |
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sizeof(struct sockaddr_in6))) { |
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ret = -EFAULT; |
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goto out; |
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} |
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} |
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rds_send_drop_to(rs, &sin6); |
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out: |
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return ret; |
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} |
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|
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static int rds_set_bool_option(unsigned char *optvar, sockptr_t optval, |
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int optlen) |
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{ |
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int value; |
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|
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if (optlen < sizeof(int)) |
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return -EINVAL; |
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if (copy_from_sockptr(&value, optval, sizeof(int))) |
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return -EFAULT; |
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*optvar = !!value; |
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return 0; |
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} |
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|
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static int rds_cong_monitor(struct rds_sock *rs, sockptr_t optval, int optlen) |
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{ |
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int ret; |
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|
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ret = rds_set_bool_option(&rs->rs_cong_monitor, optval, optlen); |
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if (ret == 0) { |
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if (rs->rs_cong_monitor) { |
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rds_cong_add_socket(rs); |
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} else { |
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rds_cong_remove_socket(rs); |
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rs->rs_cong_mask = 0; |
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rs->rs_cong_notify = 0; |
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} |
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} |
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return ret; |
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} |
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|
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static int rds_set_transport(struct rds_sock *rs, sockptr_t optval, int optlen) |
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{ |
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int t_type; |
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|
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if (rs->rs_transport) |
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return -EOPNOTSUPP; /* previously attached to transport */ |
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|
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if (optlen != sizeof(int)) |
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return -EINVAL; |
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|
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if (copy_from_sockptr(&t_type, optval, sizeof(t_type))) |
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return -EFAULT; |
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|
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if (t_type < 0 || t_type >= RDS_TRANS_COUNT) |
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return -EINVAL; |
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|
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rs->rs_transport = rds_trans_get(t_type); |
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|
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return rs->rs_transport ? 0 : -ENOPROTOOPT; |
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} |
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|
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static int rds_enable_recvtstamp(struct sock *sk, sockptr_t optval, |
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int optlen, int optname) |
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{ |
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int val, valbool; |
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|
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if (optlen != sizeof(int)) |
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return -EFAULT; |
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|
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if (copy_from_sockptr(&val, optval, sizeof(int))) |
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return -EFAULT; |
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valbool = val ? 1 : 0; |
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|
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if (optname == SO_TIMESTAMP_NEW) |
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sock_set_flag(sk, SOCK_TSTAMP_NEW); |
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|
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if (valbool) |
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sock_set_flag(sk, SOCK_RCVTSTAMP); |
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else |
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sock_reset_flag(sk, SOCK_RCVTSTAMP); |
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|
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return 0; |
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} |
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|
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static int rds_recv_track_latency(struct rds_sock *rs, sockptr_t optval, |
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int optlen) |
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{ |
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struct rds_rx_trace_so trace; |
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int i; |
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|
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if (optlen != sizeof(struct rds_rx_trace_so)) |
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return -EFAULT; |
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|
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if (copy_from_sockptr(&trace, optval, sizeof(trace))) |
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return -EFAULT; |
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|
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if (trace.rx_traces > RDS_MSG_RX_DGRAM_TRACE_MAX) |
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return -EFAULT; |
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|
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rs->rs_rx_traces = trace.rx_traces; |
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for (i = 0; i < rs->rs_rx_traces; i++) { |
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if (trace.rx_trace_pos[i] > RDS_MSG_RX_DGRAM_TRACE_MAX) { |
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rs->rs_rx_traces = 0; |
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return -EFAULT; |
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} |
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rs->rs_rx_trace[i] = trace.rx_trace_pos[i]; |
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} |
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|
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return 0; |
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} |
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|
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static int rds_setsockopt(struct socket *sock, int level, int optname, |
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sockptr_t optval, unsigned int optlen) |
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{ |
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struct rds_sock *rs = rds_sk_to_rs(sock->sk); |
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int ret; |
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|
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if (level != SOL_RDS) { |
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ret = -ENOPROTOOPT; |
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goto out; |
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} |
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|
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switch (optname) { |
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case RDS_CANCEL_SENT_TO: |
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ret = rds_cancel_sent_to(rs, optval, optlen); |
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break; |
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case RDS_GET_MR: |
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ret = rds_get_mr(rs, optval, optlen); |
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break; |
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case RDS_GET_MR_FOR_DEST: |
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ret = rds_get_mr_for_dest(rs, optval, optlen); |
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break; |
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case RDS_FREE_MR: |
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ret = rds_free_mr(rs, optval, optlen); |
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break; |
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case RDS_RECVERR: |
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ret = rds_set_bool_option(&rs->rs_recverr, optval, optlen); |
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break; |
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case RDS_CONG_MONITOR: |
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ret = rds_cong_monitor(rs, optval, optlen); |
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break; |
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case SO_RDS_TRANSPORT: |
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lock_sock(sock->sk); |
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ret = rds_set_transport(rs, optval, optlen); |
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release_sock(sock->sk); |
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break; |
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case SO_TIMESTAMP_OLD: |
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case SO_TIMESTAMP_NEW: |
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lock_sock(sock->sk); |
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ret = rds_enable_recvtstamp(sock->sk, optval, optlen, optname); |
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release_sock(sock->sk); |
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break; |
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case SO_RDS_MSG_RXPATH_LATENCY: |
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ret = rds_recv_track_latency(rs, optval, optlen); |
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break; |
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default: |
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ret = -ENOPROTOOPT; |
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} |
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out: |
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return ret; |
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} |
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|
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static int rds_getsockopt(struct socket *sock, int level, int optname, |
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char __user *optval, int __user *optlen) |
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{ |
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struct rds_sock *rs = rds_sk_to_rs(sock->sk); |
|
int ret = -ENOPROTOOPT, len; |
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int trans; |
|
|
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if (level != SOL_RDS) |
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goto out; |
|
|
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if (get_user(len, optlen)) { |
|
ret = -EFAULT; |
|
goto out; |
|
} |
|
|
|
switch (optname) { |
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case RDS_INFO_FIRST ... RDS_INFO_LAST: |
|
ret = rds_info_getsockopt(sock, optname, optval, |
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optlen); |
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break; |
|
|
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case RDS_RECVERR: |
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if (len < sizeof(int)) |
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ret = -EINVAL; |
|
else |
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if (put_user(rs->rs_recverr, (int __user *) optval) || |
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put_user(sizeof(int), optlen)) |
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ret = -EFAULT; |
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else |
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ret = 0; |
|
break; |
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case SO_RDS_TRANSPORT: |
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if (len < sizeof(int)) { |
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ret = -EINVAL; |
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break; |
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} |
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trans = (rs->rs_transport ? rs->rs_transport->t_type : |
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RDS_TRANS_NONE); /* unbound */ |
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if (put_user(trans, (int __user *)optval) || |
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put_user(sizeof(int), optlen)) |
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ret = -EFAULT; |
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else |
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ret = 0; |
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break; |
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default: |
|
break; |
|
} |
|
|
|
out: |
|
return ret; |
|
|
|
} |
|
|
|
static int rds_connect(struct socket *sock, struct sockaddr *uaddr, |
|
int addr_len, int flags) |
|
{ |
|
struct sock *sk = sock->sk; |
|
struct sockaddr_in *sin; |
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struct rds_sock *rs = rds_sk_to_rs(sk); |
|
int ret = 0; |
|
|
|
if (addr_len < offsetofend(struct sockaddr, sa_family)) |
|
return -EINVAL; |
|
|
|
lock_sock(sk); |
|
|
|
switch (uaddr->sa_family) { |
|
case AF_INET: |
|
sin = (struct sockaddr_in *)uaddr; |
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if (addr_len < sizeof(struct sockaddr_in)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) { |
|
ret = -EDESTADDRREQ; |
|
break; |
|
} |
|
if (ipv4_is_multicast(sin->sin_addr.s_addr) || |
|
sin->sin_addr.s_addr == htonl(INADDR_BROADCAST)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &rs->rs_conn_addr); |
|
rs->rs_conn_port = sin->sin_port; |
|
break; |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
case AF_INET6: { |
|
struct sockaddr_in6 *sin6; |
|
int addr_type; |
|
|
|
sin6 = (struct sockaddr_in6 *)uaddr; |
|
if (addr_len < sizeof(struct sockaddr_in6)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
addr_type = ipv6_addr_type(&sin6->sin6_addr); |
|
if (!(addr_type & IPV6_ADDR_UNICAST)) { |
|
__be32 addr4; |
|
|
|
if (!(addr_type & IPV6_ADDR_MAPPED)) { |
|
ret = -EPROTOTYPE; |
|
break; |
|
} |
|
|
|
/* It is a mapped address. Need to do some sanity |
|
* checks. |
|
*/ |
|
addr4 = sin6->sin6_addr.s6_addr32[3]; |
|
if (addr4 == htonl(INADDR_ANY) || |
|
addr4 == htonl(INADDR_BROADCAST) || |
|
ipv4_is_multicast(addr4)) { |
|
ret = -EPROTOTYPE; |
|
break; |
|
} |
|
} |
|
|
|
if (addr_type & IPV6_ADDR_LINKLOCAL) { |
|
/* If socket is arleady bound to a link local address, |
|
* the peer address must be on the same link. |
|
*/ |
|
if (sin6->sin6_scope_id == 0 || |
|
(!ipv6_addr_any(&rs->rs_bound_addr) && |
|
rs->rs_bound_scope_id && |
|
sin6->sin6_scope_id != rs->rs_bound_scope_id)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
/* Remember the connected address scope ID. It will |
|
* be checked against the binding local address when |
|
* the socket is bound. |
|
*/ |
|
rs->rs_bound_scope_id = sin6->sin6_scope_id; |
|
} |
|
rs->rs_conn_addr = sin6->sin6_addr; |
|
rs->rs_conn_port = sin6->sin6_port; |
|
break; |
|
} |
|
#endif |
|
|
|
default: |
|
ret = -EAFNOSUPPORT; |
|
break; |
|
} |
|
|
|
release_sock(sk); |
|
return ret; |
|
} |
|
|
|
static struct proto rds_proto = { |
|
.name = "RDS", |
|
.owner = THIS_MODULE, |
|
.obj_size = sizeof(struct rds_sock), |
|
}; |
|
|
|
static const struct proto_ops rds_proto_ops = { |
|
.family = AF_RDS, |
|
.owner = THIS_MODULE, |
|
.release = rds_release, |
|
.bind = rds_bind, |
|
.connect = rds_connect, |
|
.socketpair = sock_no_socketpair, |
|
.accept = sock_no_accept, |
|
.getname = rds_getname, |
|
.poll = rds_poll, |
|
.ioctl = rds_ioctl, |
|
.listen = sock_no_listen, |
|
.shutdown = sock_no_shutdown, |
|
.setsockopt = rds_setsockopt, |
|
.getsockopt = rds_getsockopt, |
|
.sendmsg = rds_sendmsg, |
|
.recvmsg = rds_recvmsg, |
|
.mmap = sock_no_mmap, |
|
.sendpage = sock_no_sendpage, |
|
}; |
|
|
|
static void rds_sock_destruct(struct sock *sk) |
|
{ |
|
struct rds_sock *rs = rds_sk_to_rs(sk); |
|
|
|
WARN_ON((&rs->rs_item != rs->rs_item.next || |
|
&rs->rs_item != rs->rs_item.prev)); |
|
} |
|
|
|
static int __rds_create(struct socket *sock, struct sock *sk, int protocol) |
|
{ |
|
struct rds_sock *rs; |
|
|
|
sock_init_data(sock, sk); |
|
sock->ops = &rds_proto_ops; |
|
sk->sk_protocol = protocol; |
|
sk->sk_destruct = rds_sock_destruct; |
|
|
|
rs = rds_sk_to_rs(sk); |
|
spin_lock_init(&rs->rs_lock); |
|
rwlock_init(&rs->rs_recv_lock); |
|
INIT_LIST_HEAD(&rs->rs_send_queue); |
|
INIT_LIST_HEAD(&rs->rs_recv_queue); |
|
INIT_LIST_HEAD(&rs->rs_notify_queue); |
|
INIT_LIST_HEAD(&rs->rs_cong_list); |
|
rds_message_zcopy_queue_init(&rs->rs_zcookie_queue); |
|
spin_lock_init(&rs->rs_rdma_lock); |
|
rs->rs_rdma_keys = RB_ROOT; |
|
rs->rs_rx_traces = 0; |
|
rs->rs_tos = 0; |
|
rs->rs_conn = NULL; |
|
|
|
spin_lock_bh(&rds_sock_lock); |
|
list_add_tail(&rs->rs_item, &rds_sock_list); |
|
rds_sock_count++; |
|
spin_unlock_bh(&rds_sock_lock); |
|
|
|
return 0; |
|
} |
|
|
|
static int rds_create(struct net *net, struct socket *sock, int protocol, |
|
int kern) |
|
{ |
|
struct sock *sk; |
|
|
|
if (sock->type != SOCK_SEQPACKET || protocol) |
|
return -ESOCKTNOSUPPORT; |
|
|
|
sk = sk_alloc(net, AF_RDS, GFP_KERNEL, &rds_proto, kern); |
|
if (!sk) |
|
return -ENOMEM; |
|
|
|
return __rds_create(sock, sk, protocol); |
|
} |
|
|
|
void rds_sock_addref(struct rds_sock *rs) |
|
{ |
|
sock_hold(rds_rs_to_sk(rs)); |
|
} |
|
|
|
void rds_sock_put(struct rds_sock *rs) |
|
{ |
|
sock_put(rds_rs_to_sk(rs)); |
|
} |
|
|
|
static const struct net_proto_family rds_family_ops = { |
|
.family = AF_RDS, |
|
.create = rds_create, |
|
.owner = THIS_MODULE, |
|
}; |
|
|
|
static void rds_sock_inc_info(struct socket *sock, unsigned int len, |
|
struct rds_info_iterator *iter, |
|
struct rds_info_lengths *lens) |
|
{ |
|
struct rds_sock *rs; |
|
struct rds_incoming *inc; |
|
unsigned int total = 0; |
|
|
|
len /= sizeof(struct rds_info_message); |
|
|
|
spin_lock_bh(&rds_sock_lock); |
|
|
|
list_for_each_entry(rs, &rds_sock_list, rs_item) { |
|
/* This option only supports IPv4 sockets. */ |
|
if (!ipv6_addr_v4mapped(&rs->rs_bound_addr)) |
|
continue; |
|
|
|
read_lock(&rs->rs_recv_lock); |
|
|
|
/* XXX too lazy to maintain counts.. */ |
|
list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { |
|
total++; |
|
if (total <= len) |
|
rds_inc_info_copy(inc, iter, |
|
inc->i_saddr.s6_addr32[3], |
|
rs->rs_bound_addr_v4, |
|
1); |
|
} |
|
|
|
read_unlock(&rs->rs_recv_lock); |
|
} |
|
|
|
spin_unlock_bh(&rds_sock_lock); |
|
|
|
lens->nr = total; |
|
lens->each = sizeof(struct rds_info_message); |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
static void rds6_sock_inc_info(struct socket *sock, unsigned int len, |
|
struct rds_info_iterator *iter, |
|
struct rds_info_lengths *lens) |
|
{ |
|
struct rds_incoming *inc; |
|
unsigned int total = 0; |
|
struct rds_sock *rs; |
|
|
|
len /= sizeof(struct rds6_info_message); |
|
|
|
spin_lock_bh(&rds_sock_lock); |
|
|
|
list_for_each_entry(rs, &rds_sock_list, rs_item) { |
|
read_lock(&rs->rs_recv_lock); |
|
|
|
list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { |
|
total++; |
|
if (total <= len) |
|
rds6_inc_info_copy(inc, iter, &inc->i_saddr, |
|
&rs->rs_bound_addr, 1); |
|
} |
|
|
|
read_unlock(&rs->rs_recv_lock); |
|
} |
|
|
|
spin_unlock_bh(&rds_sock_lock); |
|
|
|
lens->nr = total; |
|
lens->each = sizeof(struct rds6_info_message); |
|
} |
|
#endif |
|
|
|
static void rds_sock_info(struct socket *sock, unsigned int len, |
|
struct rds_info_iterator *iter, |
|
struct rds_info_lengths *lens) |
|
{ |
|
struct rds_info_socket sinfo; |
|
unsigned int cnt = 0; |
|
struct rds_sock *rs; |
|
|
|
len /= sizeof(struct rds_info_socket); |
|
|
|
spin_lock_bh(&rds_sock_lock); |
|
|
|
if (len < rds_sock_count) { |
|
cnt = rds_sock_count; |
|
goto out; |
|
} |
|
|
|
list_for_each_entry(rs, &rds_sock_list, rs_item) { |
|
/* This option only supports IPv4 sockets. */ |
|
if (!ipv6_addr_v4mapped(&rs->rs_bound_addr)) |
|
continue; |
|
sinfo.sndbuf = rds_sk_sndbuf(rs); |
|
sinfo.rcvbuf = rds_sk_rcvbuf(rs); |
|
sinfo.bound_addr = rs->rs_bound_addr_v4; |
|
sinfo.connected_addr = rs->rs_conn_addr_v4; |
|
sinfo.bound_port = rs->rs_bound_port; |
|
sinfo.connected_port = rs->rs_conn_port; |
|
sinfo.inum = sock_i_ino(rds_rs_to_sk(rs)); |
|
|
|
rds_info_copy(iter, &sinfo, sizeof(sinfo)); |
|
cnt++; |
|
} |
|
|
|
out: |
|
lens->nr = cnt; |
|
lens->each = sizeof(struct rds_info_socket); |
|
|
|
spin_unlock_bh(&rds_sock_lock); |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
static void rds6_sock_info(struct socket *sock, unsigned int len, |
|
struct rds_info_iterator *iter, |
|
struct rds_info_lengths *lens) |
|
{ |
|
struct rds6_info_socket sinfo6; |
|
struct rds_sock *rs; |
|
|
|
len /= sizeof(struct rds6_info_socket); |
|
|
|
spin_lock_bh(&rds_sock_lock); |
|
|
|
if (len < rds_sock_count) |
|
goto out; |
|
|
|
list_for_each_entry(rs, &rds_sock_list, rs_item) { |
|
sinfo6.sndbuf = rds_sk_sndbuf(rs); |
|
sinfo6.rcvbuf = rds_sk_rcvbuf(rs); |
|
sinfo6.bound_addr = rs->rs_bound_addr; |
|
sinfo6.connected_addr = rs->rs_conn_addr; |
|
sinfo6.bound_port = rs->rs_bound_port; |
|
sinfo6.connected_port = rs->rs_conn_port; |
|
sinfo6.inum = sock_i_ino(rds_rs_to_sk(rs)); |
|
|
|
rds_info_copy(iter, &sinfo6, sizeof(sinfo6)); |
|
} |
|
|
|
out: |
|
lens->nr = rds_sock_count; |
|
lens->each = sizeof(struct rds6_info_socket); |
|
|
|
spin_unlock_bh(&rds_sock_lock); |
|
} |
|
#endif |
|
|
|
static void rds_exit(void) |
|
{ |
|
sock_unregister(rds_family_ops.family); |
|
proto_unregister(&rds_proto); |
|
rds_conn_exit(); |
|
rds_cong_exit(); |
|
rds_sysctl_exit(); |
|
rds_threads_exit(); |
|
rds_stats_exit(); |
|
rds_page_exit(); |
|
rds_bind_lock_destroy(); |
|
rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info); |
|
rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
rds_info_deregister_func(RDS6_INFO_SOCKETS, rds6_sock_info); |
|
rds_info_deregister_func(RDS6_INFO_RECV_MESSAGES, rds6_sock_inc_info); |
|
#endif |
|
} |
|
module_exit(rds_exit); |
|
|
|
u32 rds_gen_num; |
|
|
|
static int rds_init(void) |
|
{ |
|
int ret; |
|
|
|
net_get_random_once(&rds_gen_num, sizeof(rds_gen_num)); |
|
|
|
ret = rds_bind_lock_init(); |
|
if (ret) |
|
goto out; |
|
|
|
ret = rds_conn_init(); |
|
if (ret) |
|
goto out_bind; |
|
|
|
ret = rds_threads_init(); |
|
if (ret) |
|
goto out_conn; |
|
ret = rds_sysctl_init(); |
|
if (ret) |
|
goto out_threads; |
|
ret = rds_stats_init(); |
|
if (ret) |
|
goto out_sysctl; |
|
ret = proto_register(&rds_proto, 1); |
|
if (ret) |
|
goto out_stats; |
|
ret = sock_register(&rds_family_ops); |
|
if (ret) |
|
goto out_proto; |
|
|
|
rds_info_register_func(RDS_INFO_SOCKETS, rds_sock_info); |
|
rds_info_register_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
rds_info_register_func(RDS6_INFO_SOCKETS, rds6_sock_info); |
|
rds_info_register_func(RDS6_INFO_RECV_MESSAGES, rds6_sock_inc_info); |
|
#endif |
|
|
|
goto out; |
|
|
|
out_proto: |
|
proto_unregister(&rds_proto); |
|
out_stats: |
|
rds_stats_exit(); |
|
out_sysctl: |
|
rds_sysctl_exit(); |
|
out_threads: |
|
rds_threads_exit(); |
|
out_conn: |
|
rds_conn_exit(); |
|
rds_cong_exit(); |
|
rds_page_exit(); |
|
out_bind: |
|
rds_bind_lock_destroy(); |
|
out: |
|
return ret; |
|
} |
|
module_init(rds_init); |
|
|
|
#define DRV_VERSION "4.0" |
|
#define DRV_RELDATE "Feb 12, 2009" |
|
|
|
MODULE_AUTHOR("Oracle Corporation <[email protected]>"); |
|
MODULE_DESCRIPTION("RDS: Reliable Datagram Sockets" |
|
" v" DRV_VERSION " (" DRV_RELDATE ")"); |
|
MODULE_VERSION(DRV_VERSION); |
|
MODULE_LICENSE("Dual BSD/GPL"); |
|
MODULE_ALIAS_NETPROTO(PF_RDS);
|
|
|