/*
 * 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(void)
{
	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,
};
lass='active' href='/cgit.cgi/linux/net-next.git/commit/?id=30ee052e12b97c190b27fe6f20e3ac3047df7b5c'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/?id=30ee052e12b97c190b27fe6f20e3ac3047df7b5c'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/'>
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<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='30ee052e12b97c190b27fe6f20e3ac3047df7b5c'/><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>Christoph Hellwig &lt;hch@lst.de&gt;</td><td class='right'>2016-04-06 07:53:29 +1000</td></tr>
<tr><th>committer</th><td>Dave Chinner &lt;david@fromorbit.com&gt;</td><td class='right'>2016-04-06 07:53:29 +1000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=30ee052e12b97c190b27fe6f20e3ac3047df7b5c'>30ee052e12b97c190b27fe6f20e3ac3047df7b5c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=30ee052e12b97c190b27fe6f20e3ac3047df7b5c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=30ee052e12b97c190b27fe6f20e3ac3047df7b5c'>92b34446e88e72e6ddce730b1f1b4192614a45be</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=bfe8804d908a791b16e3686c101f0d7eca9fb5b9'>bfe8804d908a791b16e3686c101f0d7eca9fb5b9</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=30ee052e12b97c190b27fe6f20e3ac3047df7b5c&amp;id2=bfe8804d908a791b16e3686c101f0d7eca9fb5b9'>diff</a>)</td></tr></table>
<div class='commit-subject'>xfs: optimize inline symlinks</div><div class='commit-msg'>By overallocating the in-core inode fork data buffer and zero
terminating the link target in xfs_init_local_fork we can avoid
the memory allocation in -&gt;follow_link.

Signed-off-by: Christoph Hellwig &lt;hch@lst.de&gt;
Reviewed-by: Dave Chinner &lt;dchinner@redhat.com&gt;
Signed-off-by: Dave Chinner &lt;david@fromorbit.com&gt;


</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=30ee052e12b97c190b27fe6f20e3ac3047df7b5c'>Diffstat</a></div><table summary='diffstat' class='diffstat'>