/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009 - 2013 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

#include "pcap_io.h"
#include "built_in.h"
#include "die.h"
#include "iosched.h"
#include "ioops.h"

static ssize_t pcap_rw_write(int fd, pcap_pkthdr_t *phdr, enum pcap_type type,
			     const uint8_t *packet, size_t len)
{
	ssize_t ret, hdrsize = pcap_get_hdr_length(phdr, type), hdrlen = 0;

	ret = write_or_die(fd, &phdr->raw, hdrsize);
	if (unlikely(ret != hdrsize))
		panic("Failed to write pkt header!\n");

	hdrlen = pcap_get_length(phdr, type);
	if (unlikely(hdrlen != (ssize_t) len))
		return -EINVAL;

	ret = write_or_die(fd, packet, hdrlen);
	if (unlikely(ret != hdrlen))
		panic("Failed to write pkt payload!\n");

	return hdrsize + hdrlen;
}

static ssize_t pcap_rw_read(int fd, pcap_pkthdr_t *phdr, enum pcap_type type,
			    uint8_t *packet, size_t len)
{
	ssize_t ret, hdrsize = pcap_get_hdr_length(phdr, type), hdrlen = 0;

	ret = read_or_die(fd, &phdr->raw, hdrsize);
	if (unlikely(ret != hdrsize))
		return -EIO;

	hdrlen = pcap_get_length(phdr, type);
	if (unlikely(hdrlen == 0 || hdrlen > (ssize_t) len))
                return -EINVAL;

	ret = read(fd, packet, hdrlen);
	if (unlikely(ret != hdrlen))
		return -EIO;

	return hdrsize + hdrlen;
}

static void pcap_rw_init_once(bool enforce_prio)
{
	if (enforce_prio)
		set_ioprio_rt();
}

static void pcap_rw_fsync(int fd)
{
	fdatasync(fd);
}

const struct pcap_file_ops pcap_rw_ops = {
	.init_once_pcap = pcap_rw_init_once,
	.pull_fhdr_pcap = pcap_generic_pull_fhdr,
	.push_fhdr_pcap = pcap_generic_push_fhdr,
	.read_pcap = pcap_rw_read,
	.write_pcap = pcap_rw_write,
	.fsync_pcap = pcap_rw_fsync,
};
e-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/pci/ymfpci/ymfpci.c?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/ymfpci/ymfpci.c?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/ymfpci/ymfpci.c?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/pci/ymfpci/ymfpci.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>pci</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci/ymfpci?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>ymfpci</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci/ymfpci/ymfpci.c?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a'>ymfpci.c</a></div><div class='content'><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/sound/pci/ymfpci/ymfpci.c?h=nds-private-remove&amp;id=f225e4e69770a79663c62c8d6629fdf3fcbc360a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
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<tr><th>author</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 09:37:34 +0100</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 21:47:58 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/omap?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>0becc0ae5b42828785b589f686725ff5bc3b9b25</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc/omap?id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>be6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/omap?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>sound/soc/omap</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/omap?h=nds-private-remove&amp;id=24c2503255d35c269b67162c397a1a1c1e02f6ce'>24c2503255d35c269b67162c397a1a1c1e02f6ce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/omap?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25&amp;id2=24c2503255d35c269b67162c397a1a1c1e02f6ce'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/mce: Make timer handling more robust</div><div class='commit-msg'>Erik reported that on a preproduction hardware a CMCI storm triggers the
BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is
started by the CMCI logic before the MCE CPU hotplug callback starts the
timer with add_timer_on(). So the timer is already queued which triggers
the BUG.

Using add_timer_on() is pretty pointless in this code because the timer is
strictlty per CPU, initialized as pinned and all operations which arm the
timer happen on the CPU to which the timer belongs.

Simplify the whole machinery by using mod_timer() instead of add_timer_on()
which avoids the problem because mod_timer() can handle already queued
timers. Use __start_timer() everywhere so the earliest armed expiry time is
preserved.

Reported-by: Erik Veijola &lt;erik.veijola@intel.com&gt;
Tested-by: Borislav Petkov &lt;bp@alien8.de&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Reviewed-by: Borislav Petkov &lt;bp@alien8.de&gt;
Cc: Tony Luck &lt;tony.luck@intel.com&gt;
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>Diffstat</a> (limited to 'sound/soc/omap')</div><table summary='diffstat' class='diffstat'>