#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);
'><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/include/net/lwtunnel.h?id=df6dd79be8d85ee098433bca23678fab508db541'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>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>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 14:28:22 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 14:28:22 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/mailbox?id=54791b276b4000b307339f269d3bf7db877d536f'>54791b276b4000b307339f269d3bf7db877d536f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/mailbox?id=54791b276b4000b307339f269d3bf7db877d536f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=54791b276b4000b307339f269d3bf7db877d536f'>1c2616bd373ce5ea28aac2a53e32f5b5834901ce</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/mailbox?id=54791b276b4000b307339f269d3bf7db877d536f'>include/dt-bindings/mailbox</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/mailbox?id=5d0e7705774dd412a465896d08d59a81a345c1e4'>5d0e7705774dd412a465896d08d59a81a345c1e4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/mailbox?id=54791b276b4000b307339f269d3bf7db877d536f&amp;id2=5d0e7705774dd412a465896d08d59a81a345c1e4'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/mailbox?id=047487241ff59374fded8c477f21453681f5995c'>047487241ff59374fded8c477f21453681f5995c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/mailbox?id=54791b276b4000b307339f269d3bf7db877d536f&amp;id2=047487241ff59374fded8c477f21453681f5995c'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'sparc64-non-resumable-user-error-recovery'</div><div class='commit-msg'>Liam R. Howlett says:

====================
sparc64: Recover from userspace non-resumable PIO &amp; MEM errors

A non-resumable error from userspace is able to cause a kernel panic or trap
loop due to the setup and handling of the queued traps once in the kernel.
This patch series addresses both of these issues.

The queues are fixed by simply zeroing the memory before use.

PIO errors from userspace will result in a SIGBUS being sent to the user
process.

The MEM errors form userspace will result in a SIGKILL and also cause the
offending pages to be claimed so they are no longer used in future tasks.
SIGKILL is used to ensure that the process does not try to coredump and result
in an attempt to read the memory again from within kernel space.  Although
there is a HV call to scrub the memory (mem_scrub), there is no easy way to
guarantee that the real memory address(es) are not used by other tasks.
Clearing the error with mem_scrub would zero the memory and cause the other
processes to proceed with bad data.

The handling of other non-resumable errors remain unchanged and will cause a
panic.
====================

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=54791b276b4000b307339f269d3bf7db877d536f'>Diffstat</a> (limited to 'include/dt-bindings/mailbox')</div><table summary='diffstat' class='diffstat'>