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#include <sys/types.h>
#include <sys/socket.h>
#include <linux/udp.h>
#include <linux/tcp.h>
#include <linux/in.h>

#include "corking.h"
#include "die.h"

void set_udp_cork(int fd)
{
	int ret, state = 1;

	ret = setsockopt(fd, IPPROTO_UDP, UDP_CORK, &state, sizeof(state));
	if (unlikely(ret))
		panic("Cannot cork UDP socket!\n");
}

void set_udp_uncork(int fd)
{
	int ret, state = 0;

	ret = setsockopt(fd, IPPROTO_UDP, UDP_CORK, &state, sizeof(state));
	if (unlikely(ret))
		panic("Cannot uncork UDP socket!\n");
}

void set_tcp_cork(int fd)
{
	int ret, state = 1;

	ret = setsockopt(fd, IPPROTO_TCP, TCP_CORK, &state, sizeof(state));
	if (unlikely(ret))
		panic("Cannot cork TCP socket!\n");
}

void set_tcp_uncork(int fd)
{
	int ret, state = 0;

	ret = setsockopt(fd, IPPROTO_TCP, TCP_CORK, &state, sizeof(state));
	if (unlikely(ret))
		panic("Cannot uncork TCP socket!\n");
}

void set_sock_cork(int fd, bool is_udp)
{
	if (is_udp)
		set_udp_cork(fd);
	else
		set_tcp_cork(fd);
}

void set_sock_uncork(int fd, bool is_udp)
{
	if (is_udp)
		set_udp_uncork(fd);
	else
		set_tcp_uncork(fd);
}
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 <davem@davemloft.net>
Diffstat (limited to 'tools/leds/Makefile')