/*
 *  ipc/compat_mq.c
 *    32 bit emulation for POSIX message queue system calls
 *
 *    Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author: Arnd Bergmann <arnd@arndb.de>
 */

#include <linux/compat.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/mqueue.h>
#include <linux/syscalls.h>

#include <linux/uaccess.h>

struct compat_mq_attr {
	compat_long_t mq_flags;      /* message queue flags		     */
	compat_long_t mq_maxmsg;     /* maximum number of messages	     */
	compat_long_t mq_msgsize;    /* maximum message size		     */
	compat_long_t mq_curmsgs;    /* number of messages currently queued  */
	compat_long_t __reserved[4]; /* ignored for input, zeroed for output */
};

static inline int get_compat_mq_attr(struct mq_attr *attr,
			const struct compat_mq_attr __user *uattr)
{
	if (!access_ok(VERIFY_READ, uattr, sizeof *uattr))
		return -EFAULT;

	return __get_user(attr->mq_flags, &uattr->mq_flags)
		| __get_user(attr->mq_maxmsg, &uattr->mq_maxmsg)
		| __get_user(attr->mq_msgsize, &uattr->mq_msgsize)
		| __get_user(attr->mq_curmsgs, &uattr->mq_curmsgs);
}

static inline int put_compat_mq_attr(const struct mq_attr *attr,
			struct compat_mq_attr __user *uattr)
{
	if (clear_user(uattr, sizeof *uattr))
		return -EFAULT;

	return __put_user(attr->mq_flags, &uattr->mq_flags)
		| __put_user(attr->mq_maxmsg, &uattr->mq_maxmsg)
		| __put_user(attr->mq_msgsize, &uattr->mq_msgsize)
		| __put_user(attr->mq_curmsgs, &uattr->mq_curmsgs);
}

COMPAT_SYSCALL_DEFINE4(mq_open, const char __user *, u_name,
		       int, oflag, compat_mode_t, mode,
		       struct compat_mq_attr __user *, u_attr)
{
	void __user *p = NULL;
	if (u_attr && oflag & O_CREAT) {
		struct mq_attr attr;

		memset(&attr, 0, sizeof(attr));

		p = compat_alloc_user_space(sizeof(attr));
		if (get_compat_mq_attr(&attr, u_attr) ||
		    copy_to_user(p, &attr, sizeof(attr)))
			return -EFAULT;
	}
	return sys_mq_open(u_name, oflag, mode, p);
}

COMPAT_SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes,
		       const char __user *, u_msg_ptr,
		       compat_size_t, msg_len, unsigned int, msg_prio,
		       const struct compat_timespec __user *, u_abs_timeout)
{
	struct timespec __user *u_ts;

	if (compat_convert_timespec(&u_ts, u_abs_timeout))
		return -EFAULT;

	return sys_mq_timedsend(mqdes, u_msg_ptr, msg_len,
			msg_prio, u_ts);
}

COMPAT_SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes,
		       char __user *, u_msg_ptr,
		       compat_size_t, msg_len, unsigned int __user *, u_msg_prio,
		       const struct compat_timespec __user *, u_abs_timeout)
{
	struct timespec __user *u_ts;

	if (compat_convert_timespec(&u_ts, u_abs_timeout))
		return -EFAULT;

	return sys_mq_timedreceive(mqdes, u_msg_ptr, msg_len,
			u_msg_prio, u_ts);
}

COMPAT_SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes,
		       const struct compat_sigevent __user *, u_notification)
{
	struct sigevent __user *p = NULL;
	if (u_notification) {
		struct sigevent n;
		p = compat_alloc_user_space(sizeof(*p));
		if (get_compat_sigevent(&n, u_notification))
			return -EFAULT;
		if (n.sigev_notify == SIGEV_THREAD)
			n.sigev_value.sival_ptr = compat_ptr(n.sigev_value.sival_int);
		if (copy_to_user(p, &n, sizeof(*p)))
			return -EFAULT;
	}
	return sys_mq_notify(mqdes, p);
}

COMPAT_SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
		       const struct compat_mq_attr __user *, u_mqstat,
		       struct compat_mq_attr __user *, u_omqstat)
{
	struct mq_attr mqstat;
	struct mq_attr __user *p = compat_alloc_user_space(2 * sizeof(*p));
	long ret;

	memset(&mqstat, 0, sizeof(mqstat));

	if (u_mqstat) {
		if (get_compat_mq_attr(&mqstat, u_mqstat) ||
		    copy_to_user(p, &mqstat, sizeof(mqstat)))
			return -EFAULT;
	}
	ret = sys_mq_getsetattr(mqdes,
				u_mqstat ? p : NULL,
				u_omqstat ? p + 1 : NULL);
	if (ret)
		return ret;
	if (u_omqstat) {
		if (copy_from_user(&mqstat, p + 1, sizeof(mqstat)) ||
		    put_compat_mq_attr(&mqstat, u_omqstat))
			return -EFAULT;
	}
	return 0;
}
ews' 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>Zach Ploskey &lt;zach@ploskey.com&gt;</td><td class='right'>2017-01-22 00:47:19 -0800</td></tr>
<tr><th>committer</th><td>Andy Shevchenko &lt;andriy.shevchenko@linux.intel.com&gt;</td><td class='right'>2017-01-22 12:47:06 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface?id=cfee5d63767b2e7997c1f36420d008abbe61565c'>cfee5d63767b2e7997c1f36420d008abbe61565c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/xen/interface?id=cfee5d63767b2e7997c1f36420d008abbe61565c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=cfee5d63767b2e7997c1f36420d008abbe61565c'>c66a512525d224f9675c33a8d156e0f058db1de6</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/xen/interface?id=cfee5d63767b2e7997c1f36420d008abbe61565c'>include/xen/interface</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface?id=5a00b6c2438460b870a451f14593fc40d3c7edf6'>5a00b6c2438460b870a451f14593fc40d3c7edf6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen/interface?id=cfee5d63767b2e7997c1f36420d008abbe61565c&amp;id2=5a00b6c2438460b870a451f14593fc40d3c7edf6'>diff</a>)</td></tr></table>
<div class='commit-subject'>platform/x86: ideapad-laptop: handle ACPI event 1</div><div class='commit-msg'>On Ideapad laptops, ACPI event 1 is currently not handled. Many models
log "ideapad_laptop: Unknown event: 1" every 20 seconds or so while
running on battery power. Some convertible laptops receive this event
when switching in and out of tablet mode.

This adds and additional case for event 1 in ideapad_acpi_notify to call
ideapad_input_report(priv, vpc_bit), so that the event is reported to
userspace and we avoid unnecessary logging.

Fixes bug #107481 (https://bugzilla.kernel.org/show_bug.cgi?id=107481)
Fixes bug #65751 (https://bugzilla.kernel.org/show_bug.cgi?id=65751)

Signed-off-by: Zach Ploskey &lt;zach@ploskey.com&gt;
Signed-off-by: Andy Shevchenko &lt;andriy.shevchenko@linux.intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=cfee5d63767b2e7997c1f36420d008abbe61565c'>Diffstat</a> (limited to 'include/xen/interface')</div><table summary='diffstat' class='diffstat'>