/*
 * Intel MIC Platform Software Stack (MPSS)
 *
 * Copyright(c) 2013 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Intel MIC User Space Tools.
 */
#ifndef _MPSSD_H_
#define _MPSSD_H_

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <libgen.h>
#include <pthread.h>
#include <stdarg.h>
#include <time.h>
#include <errno.h>
#include <sys/dir.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <pthread.h>
#include <signal.h>
#include <limits.h>
#include <syslog.h>
#include <getopt.h>
#include <net/if.h>
#include <linux/if_tun.h>
#include <linux/if_tun.h>
#include <linux/virtio_ids.h>

#define MICSYSFSDIR "/sys/class/mic"
#define LOGFILE_NAME "/var/log/mpssd"
#define PAGE_SIZE 4096

struct mic_console_info {
	pthread_t       console_thread;
	int		virtio_console_fd;
	void		*console_dp;
};

struct mic_net_info {
	pthread_t       net_thread;
	int		virtio_net_fd;
	int		tap_fd;
	void		*net_dp;
};

struct mic_virtblk_info {
	pthread_t       block_thread;
	int		virtio_block_fd;
	void		*block_dp;
	volatile sig_atomic_t	signaled;
	char		*backend_file;
	int		backend;
	void		*backend_addr;
	long		backend_size;
};

struct mic_info {
	int		id;
	char		*name;
	pthread_t       config_thread;
	pthread_t       init_thread;
	pid_t		pid;
	struct mic_console_info	mic_console;
	struct mic_net_info	mic_net;
	struct mic_virtblk_info	mic_virtblk;
	int		restart;
	int		boot_on_resume;
	struct mic_info *next;
};

__attribute__((format(printf, 1, 2)))
void mpsslog(char *format, ...);
char *readsysfs(char *dir, char *entry);
int setsysfs(char *dir, char *entry, char *value);
#endif
ption value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/power?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>power</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='add7c65ca426b7a37184dd3d2172394e23d585d6'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='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>Andrei Vagin &lt;avagin@openvz.org&gt;</td><td class='right'>2017-01-04 19:28:14 -0800</td></tr>
<tr><th>committer</th><td>Eric W. Biederman &lt;ebiederm@xmission.com&gt;</td><td class='right'>2017-01-10 13:34:56 +1300</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/power?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>add7c65ca426b7a37184dd3d2172394e23d585d6</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/power?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>28b08b519540041b06ed0ab0b1c005076b932e8e</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/power?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>tools/power</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/power?id=75422726b0f717d67db3283c2eb5bc14fa2619c5'>75422726b0f717d67db3283c2eb5bc14fa2619c5</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/power?id=add7c65ca426b7a37184dd3d2172394e23d585d6&amp;id2=75422726b0f717d67db3283c2eb5bc14fa2619c5'>diff</a>)</td></tr></table>
<div class='commit-subject'>pid: fix lockdep deadlock warning due to ucount_lock</div><div class='commit-msg'>=========================================================
[ INFO: possible irq lock inversion dependency detected ]
4.10.0-rc2-00024-g4aecec9-dirty #118 Tainted: G        W
---------------------------------------------------------
swapper/1/0 just changed the state of lock:
 (&amp;(&amp;sighand-&gt;siglock)-&gt;rlock){-.....}, at: [&lt;ffffffffbd0a1bc6&gt;] __lock_task_sighand+0xb6/0x2c0
but this lock took another, HARDIRQ-unsafe lock in the past:
 (ucounts_lock){+.+...}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
Chain exists of:                 &amp;(&amp;sighand-&gt;siglock)-&gt;rlock --&gt; &amp;(&amp;tty-&gt;ctrl_lock)-&gt;rlock --&gt; ucounts_lock
 Possible interrupt unsafe locking scenario:
       CPU0                    CPU1
       ----                    ----
  lock(ucounts_lock);
                               local_irq_disable();
                               lock(&amp;(&amp;sighand-&gt;siglock)-&gt;rlock);
                               lock(&amp;(&amp;tty-&gt;ctrl_lock)-&gt;rlock);
  &lt;Interrupt&gt;
    lock(&amp;(&amp;sighand-&gt;siglock)-&gt;rlock);

 *** DEADLOCK ***

This patch removes a dependency between rlock and ucount_lock.

Fixes: f333c700c610 ("pidns: Add a limit on the number of pid namespaces")
Cc: stable@vger.kernel.org
Signed-off-by: Andrei Vagin &lt;avagin@openvz.org&gt;
Acked-by: Al Viro &lt;viro@ZenIV.linux.org.uk&gt;
Signed-off-by: Eric W. Biederman &lt;ebiederm@xmission.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=add7c65ca426b7a37184dd3d2172394e23d585d6'>Diffstat</a> (limited to 'tools/power')</div><table summary='diffstat' class='diffstat'>