#include <linux/fs.h>
#include <linux/quota.h>
#include <linux/export.h>

/**
 *	qid_eq - Test to see if to kquid values are the same
 *	@left: A qid value
 *	@right: Another quid value
 *
 *	Return true if the two qid values are equal and false otherwise.
 */
bool qid_eq(struct kqid left, struct kqid right)
{
	if (left.type != right.type)
		return false;
	switch(left.type) {
	case USRQUOTA:
		return uid_eq(left.uid, right.uid);
	case GRPQUOTA:
		return gid_eq(left.gid, right.gid);
	case PRJQUOTA:
		return projid_eq(left.projid, right.projid);
	default:
		BUG();
	}
}
EXPORT_SYMBOL(qid_eq);

/**
 *	qid_lt - Test to see if one qid value is less than another
 *	@left: The possibly lesser qid value
 *	@right: The possibly greater qid value
 *
 *	Return true if left is less than right and false otherwise.
 */
bool qid_lt(struct kqid left, struct kqid right)
{
	if (left.type < right.type)
		return true;
	if (left.type > right.type)
		return false;
	switch (left.type) {
	case USRQUOTA:
		return uid_lt(left.uid, right.uid);
	case GRPQUOTA:
		return gid_lt(left.gid, right.gid);
	case PRJQUOTA:
		return projid_lt(left.projid, right.projid);
	default:
		BUG();
	}
}
EXPORT_SYMBOL(qid_lt);

/**
 *	from_kqid - Create a qid from a kqid user-namespace pair.
 *	@targ: The user namespace we want a qid in.
 *	@kqid: The kernel internal quota identifier to start with.
 *
 *	Map @kqid into the user-namespace specified by @targ and
 *	return the resulting qid.
 *
 *	There is always a mapping into the initial user_namespace.
 *
 *	If @kqid has no mapping in @targ (qid_t)-1 is returned.
 */
qid_t from_kqid(struct user_namespace *targ, struct kqid kqid)
{
	switch (kqid.type) {
	case USRQUOTA:
		return from_kuid(targ, kqid.uid);
	case GRPQUOTA:
		return from_kgid(targ, kqid.gid);
	case PRJQUOTA:
		return from_kprojid(targ, kqid.projid);
	default:
		BUG();
	}
}
EXPORT_SYMBOL(from_kqid);

/**
 *	from_kqid_munged - Create a qid from a kqid user-namespace pair.
 *	@targ: The user namespace we want a qid in.
 *	@kqid: The kernel internal quota identifier to start with.
 *
 *	Map @kqid into the user-namespace specified by @targ and
 *	return the resulting qid.
 *
 *	There is always a mapping into the initial user_namespace.
 *
 *	Unlike from_kqid from_kqid_munged never fails and always
 *	returns a valid projid.  This makes from_kqid_munged
 *	appropriate for use in places where failing to provide
 *	a qid_t is not a good option.
 *
 *	If @kqid has no mapping in @targ the kqid.type specific
 *	overflow identifier is returned.
 */
qid_t from_kqid_munged(struct user_namespace *targ, struct kqid kqid)
{
	switch (kqid.type) {
	case USRQUOTA:
		return from_kuid_munged(targ, kqid.uid);
	case GRPQUOTA:
		return from_kgid_munged(targ, kqid.gid);
	case PRJQUOTA:
		return from_kprojid_munged(targ, kqid.projid);
	default:
		BUG();
	}
}
EXPORT_SYMBOL(from_kqid_munged);

/**
 *	qid_valid - Report if a valid value is stored in a kqid.
 *	@qid: The kernel internal quota identifier to test.
 */
bool qid_valid(struct kqid qid)
{
	switch (qid.type) {
	case USRQUOTA:
		return uid_valid(qid.uid);
	case GRPQUOTA:
		return gid_valid(qid.gid);
	case PRJQUOTA:
		return projid_valid(qid.projid);
	default:
		BUG();
	}
}
EXPORT_SYMBOL(qid_valid);
>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Yuchung Cheng &lt;ycheng@google.com&gt;</td><td class='right'>2017-01-27 16:24:39 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-29 19:17:23 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=678550c651aee051d66112933c87894f129b9355'>678550c651aee051d66112933c87894f129b9355</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=678550c651aee051d66112933c87894f129b9355'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=678550c651aee051d66112933c87894f129b9355'>ed24210650990895c35fbae14f84237f8c0fccd2</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=7e98102f489775d8c000884fca8a0d995ea688a9'>7e98102f489775d8c000884fca8a0d995ea688a9</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=678550c651aee051d66112933c87894f129b9355&amp;id2=7e98102f489775d8c000884fca8a0d995ea688a9'>diff</a>)</td></tr></table>
<div class='commit-subject'>tcp: include locally failed retries in retransmission stats</div><div class='commit-msg'>Currently the retransmission stats are not incremented if the
retransmit fails locally. But we always increment the other packet
counters that track total packet/bytes sent.  Awkwardly while we
don't count these failed retransmits in RETRANSSEGS, we do count
them in FAILEDRETRANS.

If the qdisc is dropping many packets this could under-estimate
TCP retransmission rate substantially from both SNMP or per-socket
TCP_INFO stats. This patch changes this by always incrementing
retransmission stats on retransmission attempts and failures.

Another motivation is to properly track retransmists in
SCM_TIMESTAMPING_OPT_STATS. Since SCM_TSTAMP_SCHED collection is
triggered in tcp_transmit_skb(), If tp-&gt;total_retrans is incremented
after the function, we'll always mis-count by the amount of the
latest retransmission.

Signed-off-by: Yuchung Cheng &lt;ycheng@google.com&gt;
Signed-off-by: Soheil Hassas Yeganeh &lt;soheil@google.com&gt;
Acked-by: Neal Cardwell &lt;ncardwell@google.com&gt;
Acked-by: Eric Dumazet &lt;edumazet@google.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=678550c651aee051d66112933c87894f129b9355'>Diffstat</a></div><table summary='diffstat' class='diffstat'>