#undef TRACE_SYSTEM
#define TRACE_SYSTEM signal

#if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_SIGNAL_H

#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/tracepoint.h>

#define TP_STORE_SIGINFO(__entry, info)				\
	do {							\
		if (info == SEND_SIG_NOINFO ||			\
		    info == SEND_SIG_FORCED) {			\
			__entry->errno	= 0;			\
			__entry->code	= SI_USER;		\
		} else if (info == SEND_SIG_PRIV) {		\
			__entry->errno	= 0;			\
			__entry->code	= SI_KERNEL;		\
		} else {					\
			__entry->errno	= info->si_errno;	\
			__entry->code	= info->si_code;	\
		}						\
	} while (0)

#ifndef TRACE_HEADER_MULTI_READ
enum {
	TRACE_SIGNAL_DELIVERED,
	TRACE_SIGNAL_IGNORED,
	TRACE_SIGNAL_ALREADY_PENDING,
	TRACE_SIGNAL_OVERFLOW_FAIL,
	TRACE_SIGNAL_LOSE_INFO,
};
#endif

/**
 * signal_generate - called when a signal is generated
 * @sig: signal number
 * @info: pointer to struct siginfo
 * @task: pointer to struct task_struct
 * @group: shared or private
 * @result: TRACE_SIGNAL_*
 *
 * Current process sends a 'sig' signal to 'task' process with
 * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,
 * 'info' is not a pointer and you can't access its field. Instead,
 * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV
 * means that si_code is SI_KERNEL.
 */
TRACE_EVENT(signal_generate,

	TP_PROTO(int sig, struct siginfo *info, struct task_struct *task,
			int group, int result),

	TP_ARGS(sig, info, task, group, result),

	TP_STRUCT__entry(
		__field(	int,	sig			)
		__field(	int,	errno			)
		__field(	int,	code			)
		__array(	char,	comm,	TASK_COMM_LEN	)
		__field(	pid_t,	pid			)
		__field(	int,	group			)
		__field(	int,	result			)
	),

	TP_fast_assign(
		__entry->sig	= sig;
		TP_STORE_SIGINFO(__entry, info);
		memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
		__entry->pid	= task->pid;
		__entry->group	= group;
		__entry->result	= result;
	),

	TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d",
		  __entry->sig, __entry->errno, __entry->code,
		  __entry->comm, __entry->pid, __entry->group,
		  __entry->result)
);

/**
 * signal_deliver - called when a signal is delivered
 * @sig: signal number
 * @info: pointer to struct siginfo
 * @ka: pointer to struct k_sigaction
 *
 * A 'sig' signal is delivered to current process with 'info' siginfo,
 * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
 * SIG_DFL.
 * Note that some signals reported by signal_generate tracepoint can be
 * lost, ignored or modified (by debugger) before hitting this tracepoint.
 * This means, this can show which signals are actually delivered, but
 * matching generated signals and delivered signals may not be correct.
 */
TRACE_EVENT(signal_deliver,

	TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka),

	TP_ARGS(sig, info, ka),

	TP_STRUCT__entry(
		__field(	int,		sig		)
		__field(	int,		errno		)
		__field(	int,		code		)
		__field(	unsigned long,	sa_handler	)
		__field(	unsigned long,	sa_flags	)
	),

	TP_fast_assign(
		__entry->sig	= sig;
		TP_STORE_SIGINFO(__entry, info);
		__entry->sa_handler	= (unsigned long)ka->sa.sa_handler;
		__entry->sa_flags	= ka->sa.sa_flags;
	),

	TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",
		  __entry->sig, __entry->errno, __entry->code,
		  __entry->sa_handler, __entry->sa_flags)
);

#endif /* _TRACE_SIGNAL_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
ame='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>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/uapi/scsi/fc?id=54791b276b4000b307339f269d3bf7db877d536f'>54791b276b4000b307339f269d3bf7db877d536f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/uapi/scsi/fc?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/uapi/scsi/fc?id=54791b276b4000b307339f269d3bf7db877d536f'>include/uapi/scsi/fc</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/scsi/fc?id=5d0e7705774dd412a465896d08d59a81a345c1e4'>5d0e7705774dd412a465896d08d59a81a345c1e4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/uapi/scsi/fc?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/uapi/scsi/fc?id=047487241ff59374fded8c477f21453681f5995c'>047487241ff59374fded8c477f21453681f5995c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/uapi/scsi/fc?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/uapi/scsi/fc')</div><table summary='diffstat' class='diffstat'>