mirror of
https://github.com/torvalds/linux
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c915fe13cb
The commit850cbaddb5("udp: use it's own memory accounting schema") assumes that the socket proto has memory accounting enabled, but this is not the case for UDPLITE. Fix it enabling memory accounting for UDPLITE and performing fwd allocated memory reclaiming on socket shutdown. UDP and UDPLITE share now the same memory accounting limits. Also drop the backlog receive operation, since is no more needed. Fixes:850cbaddb5("udp: use it's own memory accounting schema") Reported-by: Andrei Vagin <avagin@gmail.com> Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
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* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
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*
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* Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
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*
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* Changes:
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* Fixes:
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#define pr_fmt(fmt) "UDPLite: " fmt
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#include <linux/export.h>
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#include "udp_impl.h"
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struct udp_table udplite_table __read_mostly;
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EXPORT_SYMBOL(udplite_table);
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static int udplite_rcv(struct sk_buff *skb)
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{
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return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
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}
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static void udplite_err(struct sk_buff *skb, u32 info)
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{
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__udp4_lib_err(skb, info, &udplite_table);
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}
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static const struct net_protocol udplite_protocol = {
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.handler = udplite_rcv,
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.err_handler = udplite_err,
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.no_policy = 1,
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.netns_ok = 1,
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};
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struct proto udplite_prot = {
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.name = "UDP-Lite",
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.owner = THIS_MODULE,
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.close = udp_lib_close,
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.connect = ip4_datagram_connect,
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.disconnect = udp_disconnect,
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.ioctl = udp_ioctl,
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.init = udplite_sk_init,
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.destroy = udp_destroy_sock,
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.setsockopt = udp_setsockopt,
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.getsockopt = udp_getsockopt,
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.sendmsg = udp_sendmsg,
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.recvmsg = udp_recvmsg,
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.sendpage = udp_sendpage,
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.hash = udp_lib_hash,
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.unhash = udp_lib_unhash,
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.get_port = udp_v4_get_port,
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.memory_allocated = &udp_memory_allocated,
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.sysctl_mem = sysctl_udp_mem,
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.obj_size = sizeof(struct udp_sock),
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.h.udp_table = &udplite_table,
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#ifdef CONFIG_COMPAT
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.compat_setsockopt = compat_udp_setsockopt,
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.compat_getsockopt = compat_udp_getsockopt,
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#endif
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};
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EXPORT_SYMBOL(udplite_prot);
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static struct inet_protosw udplite4_protosw = {
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.type = SOCK_DGRAM,
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.protocol = IPPROTO_UDPLITE,
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.prot = &udplite_prot,
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.ops = &inet_dgram_ops,
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.flags = INET_PROTOSW_PERMANENT,
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};
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#ifdef CONFIG_PROC_FS
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static const struct file_operations udplite_afinfo_seq_fops = {
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.owner = THIS_MODULE,
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.open = udp_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net
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};
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static struct udp_seq_afinfo udplite4_seq_afinfo = {
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.name = "udplite",
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.family = AF_INET,
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.udp_table = &udplite_table,
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.seq_fops = &udplite_afinfo_seq_fops,
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.seq_ops = {
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.show = udp4_seq_show,
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},
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};
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static int __net_init udplite4_proc_init_net(struct net *net)
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{
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return udp_proc_register(net, &udplite4_seq_afinfo);
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}
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static void __net_exit udplite4_proc_exit_net(struct net *net)
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{
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udp_proc_unregister(net, &udplite4_seq_afinfo);
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}
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static struct pernet_operations udplite4_net_ops = {
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.init = udplite4_proc_init_net,
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.exit = udplite4_proc_exit_net,
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};
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static __init int udplite4_proc_init(void)
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{
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return register_pernet_subsys(&udplite4_net_ops);
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}
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#else
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static inline int udplite4_proc_init(void)
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{
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return 0;
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}
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#endif
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void __init udplite4_register(void)
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{
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udp_table_init(&udplite_table, "UDP-Lite");
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if (proto_register(&udplite_prot, 1))
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goto out_register_err;
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if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
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goto out_unregister_proto;
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inet_register_protosw(&udplite4_protosw);
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if (udplite4_proc_init())
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pr_err("%s: Cannot register /proc!\n", __func__);
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return;
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out_unregister_proto:
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proto_unregister(&udplite_prot);
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out_register_err:
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pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
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}
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