mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 17:36:41 +07:00
ff5c6ff542
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from helper.c file under os-Linux dir Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
139 lines
2.5 KiB
C
139 lines
2.5 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <stddef.h>
|
|
#include <sched.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/signal.h>
|
|
#include "user_util.h"
|
|
#include "kern_util.h"
|
|
#include "user.h"
|
|
#include "net_user.h"
|
|
#include "slirp.h"
|
|
#include "slip_common.h"
|
|
#include "os.h"
|
|
|
|
void slirp_user_init(void *data, void *dev)
|
|
{
|
|
struct slirp_data *pri = data;
|
|
|
|
pri->dev = dev;
|
|
}
|
|
|
|
struct slirp_pre_exec_data {
|
|
int stdin;
|
|
int stdout;
|
|
};
|
|
|
|
static void slirp_pre_exec(void *arg)
|
|
{
|
|
struct slirp_pre_exec_data *data = arg;
|
|
|
|
if(data->stdin != -1) dup2(data->stdin, 0);
|
|
if(data->stdout != -1) dup2(data->stdout, 1);
|
|
}
|
|
|
|
static int slirp_tramp(char **argv, int fd)
|
|
{
|
|
struct slirp_pre_exec_data pe_data;
|
|
int pid;
|
|
|
|
pe_data.stdin = fd;
|
|
pe_data.stdout = fd;
|
|
pid = run_helper(slirp_pre_exec, &pe_data, argv, NULL);
|
|
|
|
return(pid);
|
|
}
|
|
|
|
static int slirp_open(void *data)
|
|
{
|
|
struct slirp_data *pri = data;
|
|
int fds[2], pid, err;
|
|
|
|
err = os_pipe(fds, 1, 1);
|
|
if(err)
|
|
return(err);
|
|
|
|
err = slirp_tramp(pri->argw.argv, fds[1]);
|
|
if(err < 0){
|
|
printk("slirp_tramp failed - errno = %d\n", -err);
|
|
goto out;
|
|
}
|
|
pid = err;
|
|
|
|
pri->slave = fds[1];
|
|
pri->slip.pos = 0;
|
|
pri->slip.esc = 0;
|
|
pri->pid = err;
|
|
|
|
return(fds[0]);
|
|
out:
|
|
os_close_file(fds[0]);
|
|
os_close_file(fds[1]);
|
|
return err;
|
|
}
|
|
|
|
static void slirp_close(int fd, void *data)
|
|
{
|
|
struct slirp_data *pri = data;
|
|
int status,err;
|
|
|
|
os_close_file(fd);
|
|
os_close_file(pri->slave);
|
|
|
|
pri->slave = -1;
|
|
|
|
if(pri->pid<1) {
|
|
printk("slirp_close: no child process to shut down\n");
|
|
return;
|
|
}
|
|
|
|
#if 0
|
|
if(kill(pri->pid, SIGHUP)<0) {
|
|
printk("slirp_close: sending hangup to %d failed (%d)\n",
|
|
pri->pid, errno);
|
|
}
|
|
#endif
|
|
|
|
CATCH_EINTR(err = waitpid(pri->pid, &status, WNOHANG));
|
|
if(err < 0) {
|
|
printk("slirp_close: waitpid returned %d\n", errno);
|
|
return;
|
|
}
|
|
|
|
if(err == 0) {
|
|
printk("slirp_close: process %d has not exited\n");
|
|
return;
|
|
}
|
|
|
|
pri->pid = -1;
|
|
}
|
|
|
|
int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri)
|
|
{
|
|
return slip_proto_read(fd, buf, len, &pri->slip);
|
|
}
|
|
|
|
int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri)
|
|
{
|
|
return slip_proto_write(fd, buf, len, &pri->slip);
|
|
}
|
|
|
|
static int slirp_set_mtu(int mtu, void *data)
|
|
{
|
|
return(mtu);
|
|
}
|
|
|
|
struct net_user_info slirp_user_info = {
|
|
.init = slirp_user_init,
|
|
.open = slirp_open,
|
|
.close = slirp_close,
|
|
.remove = NULL,
|
|
.set_mtu = slirp_set_mtu,
|
|
.add_address = NULL,
|
|
.delete_address = NULL,
|
|
.max_packet = BUF_SIZE
|
|
};
|