/*
 * tcp_diag.c	Module for monitoring TCP transport protocols sockets.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 *	This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/net.h>
#include <linux/sock_diag.h>
#include <linux/inet_diag.h>

#include <linux/tcp.h>

#include <net/tcp.h>

static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
			      void *_info)
{
	struct tcp_info *info = _info;

	if (sk_state_load(sk) == TCP_LISTEN) {
		r->idiag_rqueue = sk->sk_ack_backlog;
		r->idiag_wqueue = sk->sk_max_ack_backlog;
	} else if (sk->sk_type == SOCK_STREAM) {
		const struct tcp_sock *tp = tcp_sk(sk);

		r->idiag_rqueue = max_t(int, tp->rcv_nxt - tp->copied_seq, 0);
		r->idiag_wqueue = tp->write_seq - tp->snd_una;
	}
	if (info)
		tcp_get_info(sk, info);
}

static void tcp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
			  const struct inet_diag_req_v2 *r, struct nlattr *bc)
{
	inet_diag_dump_icsk(&tcp_hashinfo, skb, cb, r, bc);
}

static int tcp_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh,
			     const struct inet_diag_req_v2 *req)
{
	return inet_diag_dump_one_icsk(&tcp_hashinfo, in_skb, nlh, req);
}

#ifdef CONFIG_INET_DIAG_DESTROY
static int tcp_diag_destroy(struct sk_buff *in_skb,
			    const struct inet_diag_req_v2 *req)
{
	struct net *net = sock_net(in_skb->sk);
	struct sock *sk = inet_diag_find_one_icsk(net, &tcp_hashinfo, req);
	int err;

	if (IS_ERR(sk))
		return PTR_ERR(sk);

	err = sock_diag_destroy(sk, ECONNABORTED);

	sock_gen_put(sk);

	return err;
}
#endif

static const struct inet_diag_handler tcp_diag_handler = {
	.dump		 = tcp_diag_dump,
	.dump_one	 = tcp_diag_dump_one,
	.idiag_get_info	 = tcp_diag_get_info,
	.idiag_type	 = IPPROTO_TCP,
	.idiag_info_size = sizeof(struct tcp_info),
#ifdef CONFIG_INET_DIAG_DESTROY
	.destroy	 = tcp_diag_destroy,
#endif
};

static int __init tcp_diag_init(void)
{
	return inet_diag_register(&tcp_diag_handler);
}

static void __exit tcp_diag_exit(void)
{
	inet_diag_unregister(&tcp_diag_handler);
}

module_init(tcp_diag_init);
module_exit(tcp_diag_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-6 /* AF_INET - IPPROTO_TCP */);
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=dd2f122a96ea041679f46c063a18145a7cf6ff5f'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=dd2f122a96ea041679f46c063a18145a7cf6ff5f'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci?h=nds-private-remove&amp;id=dd2f122a96ea041679f46c063a18145a7cf6ff5f'>pci</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci/mixart?h=nds-private-remove&amp;id=dd2f122a96ea041679f46c063a18145a7cf6ff5f'>mixart</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/pci/mixart?h=nds-private-remove&amp;id=dd2f122a96ea041679f46c063a18145a7cf6ff5f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
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<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-09 11:27:22 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-09 11:27:22 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen?h=nds-private-remove&amp;id=810ac7b7558d7830e72d8dbf34b851fce39e08b0'>810ac7b7558d7830e72d8dbf34b851fce39e08b0</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/xen?id=810ac7b7558d7830e72d8dbf34b851fce39e08b0'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=810ac7b7558d7830e72d8dbf34b851fce39e08b0'>5c026763a237ab9d7940d83deb9b719fb6247d42</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/xen?h=nds-private-remove&amp;id=810ac7b7558d7830e72d8dbf34b851fce39e08b0'>include/xen</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen?h=nds-private-remove&amp;id=861d75d098e2d0a2d7692c9d6a30b6fd2c81387c'>861d75d098e2d0a2d7692c9d6a30b6fd2c81387c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen?h=nds-private-remove&amp;id=810ac7b7558d7830e72d8dbf34b851fce39e08b0&amp;id2=861d75d098e2d0a2d7692c9d6a30b6fd2c81387c'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen?h=nds-private-remove&amp;id=325896ffdf90f7cbd59fb873b7ba20d60d1ddf3c'>325896ffdf90f7cbd59fb873b7ba20d60d1ddf3c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen?h=nds-private-remove&amp;id=810ac7b7558d7830e72d8dbf34b851fce39e08b0&amp;id2=325896ffdf90f7cbd59fb873b7ba20d60d1ddf3c'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm</div><div class='commit-msg'>Pull libnvdimm fixes from Dan Williams:
 "Several fixes to the DSM (ACPI device specific method) marshaling
  implementation.

  I consider these urgent enough to send for 4.9 consideration since
  they fix the kernel's handling of ARS (Address Range Scrub) commands.
  Especially for platforms without machine-check-recovery capabilities,
  successful execution of ARS commands enables the platform to
  potentially break out of an infinite reboot problem if a media error
  is present in the boot path. There is also a one line fix for a
  device-dax read-only mapping regression.

  Commits 9a901f5495e2 ("acpi, nfit: fix extended status translations
  for ACPI DSMs") and 325896ffdf90 ("device-dax: fix private mapping
  restriction, permit read-only") are true regression fixes for changes
  introduced this cycle.

  Commit efda1b5d87cb ("acpi, nfit, libnvdimm: fix / harden ars_status
  output length handling") fixes the kernel's handling of zero-length
  results, this never would have worked in the past, but we only just
  recently discovered a BIOS implementation that emits this arguably
  spec non-compliant result.

  The remaining two commits are additional fall out from thinking
  through the implications of a zero / truncated length result of the
  ARS Status command.

  In order to mitigate the risk that these changes introduce yet more
  regressions they are backstopped by a new unit test in commit
  a7de92dac9f0 ("tools/testing/nvdimm: unit test acpi_nfit_ctl()") that
  mocks up inputs to acpi_nfit_ctl()"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  device-dax: fix private mapping restriction, permit read-only
  tools/testing/nvdimm: unit test acpi_nfit_ctl()
  acpi, nfit: fix bus vs dimm confusion in xlat_status
  acpi, nfit: validate ars_status output buffer size
  acpi, nfit, libnvdimm: fix / harden ars_status output length handling
  acpi, nfit: fix extended status translations for ACPI DSMs
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=810ac7b7558d7830e72d8dbf34b851fce39e08b0'>Diffstat</a> (limited to 'include/xen')</div><table summary='diffstat' class='diffstat'>