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6c206b2009
After commit6b229cf77d("udp: add batching to udp_rmem_release()") the sk_rmem_alloc field does not measure exactly anymore the receive queue length, because we batch the rmem release. The issue is really apparent only after commit0d4a6608f6("udp: do rmem bulk free even if the rx sk queue is empty"): the user space can easily check for an empty socket with not-0 queue length reported by the 'ss' tool or the procfs interface. We need to use a custom UDP helper to report the correct queue length, taking into account the forward allocation deficit. Reported-by: trevor.francis@46labs.com Fixes:6b229cf77d("UDP: add batching to udp_rmem_release()") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TRANSP_V6_H
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#define _TRANSP_V6_H
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#include <net/checksum.h>
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/* IPv6 transport protocols */
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extern struct proto rawv6_prot;
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extern struct proto udpv6_prot;
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extern struct proto udplitev6_prot;
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extern struct proto tcpv6_prot;
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extern struct proto pingv6_prot;
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struct flowi6;
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/* extension headers */
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int ipv6_exthdrs_init(void);
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void ipv6_exthdrs_exit(void);
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int ipv6_frag_init(void);
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void ipv6_frag_exit(void);
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/* transport protocols */
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int pingv6_init(void);
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void pingv6_exit(void);
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int rawv6_init(void);
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void rawv6_exit(void);
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int udpv6_init(void);
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void udpv6_exit(void);
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int udplitev6_init(void);
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void udplitev6_exit(void);
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int tcpv6_init(void);
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void tcpv6_exit(void);
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int udpv6_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
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/* this does all the common and the specific ctl work */
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void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
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struct sk_buff *skb);
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void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg,
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struct sk_buff *skb);
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void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg,
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struct sk_buff *skb);
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int ip6_datagram_send_ctl(struct net *net, struct sock *sk, struct msghdr *msg,
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struct flowi6 *fl6, struct ipcm6_cookie *ipc6,
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struct sockcm_cookie *sockc);
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void __ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp,
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__u16 srcp, __u16 destp, int rqueue, int bucket);
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static inline void
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ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, __u16 srcp,
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__u16 destp, int bucket)
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{
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__ip6_dgram_sock_seq_show(seq, sp, srcp, destp, sk_rmem_alloc_get(sp),
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bucket);
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}
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#define LOOPBACK4_IPV6 cpu_to_be32(0x7f000006)
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/* address family specific functions */
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extern const struct inet_connection_sock_af_ops ipv4_specific;
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void inet6_destroy_sock(struct sock *sk);
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#define IPV6_SEQ_DGRAM_HEADER \
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" sl " \
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"local_address " \
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"remote_address " \
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"st tx_queue rx_queue tr tm->when retrnsmt" \
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" uid timeout inode ref pointer drops\n"
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#endif
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