Release 4.14 arch/um/drivers/daemon_user.c
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
* James Leu (jleu@mindspring.net).
* Copyright (C) 2001 by various other people who didn't put their name here.
* Licensed under the GPL.
*/
#include <stdint.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/un.h>
#include "daemon.h"
#include <net_user.h>
#include <os.h>
#include <um_malloc.h>
enum request_type { REQ_NEW_CONTROL };
#define SWITCH_MAGIC 0xfeedface
struct request_v3 {
uint32_t magic;
uint32_t version;
enum request_type type;
struct sockaddr_un sock;
};
static struct sockaddr_un *new_addr(void *name, int len)
{
struct sockaddr_un *sun;
sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
if (sun == NULL) {
printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
"failed\n");
return NULL;
}
sun->sun_family = AF_UNIX;
memcpy(sun->sun_path, name, len);
return sun;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 71 | 100.00% | 4 | 100.00% |
| Total | 71 | 100.00% | 4 | 100.00% |
static int connect_to_switch(struct daemon_data *pri)
{
struct sockaddr_un *ctl_addr = pri->ctl_addr;
struct sockaddr_un *local_addr = pri->local_addr;
struct sockaddr_un *sun;
struct request_v3 req;
int fd, n, err;
pri->control = socket(AF_UNIX, SOCK_STREAM, 0);
if (pri->control < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : control socket failed, "
"errno = %d\n", -err);
return err;
}
if (connect(pri->control, (struct sockaddr *) ctl_addr,
sizeof(*ctl_addr)) < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : control connect failed, "
"errno = %d\n", -err);
goto out;
}
fd = socket(AF_UNIX, SOCK_DGRAM, 0);
if (fd < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : data socket failed, "
"errno = %d\n", -err);
goto out;
}
if (bind(fd, (struct sockaddr *) local_addr, sizeof(*local_addr)) < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : data bind failed, "
"errno = %d\n", -err);
goto out_close;
}
sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
if (sun == NULL) {
printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
"failed\n");
err = -ENOMEM;
goto out_close;
}
req.magic = SWITCH_MAGIC;
req.version = SWITCH_VERSION;
req.type = REQ_NEW_CONTROL;
req.sock = *local_addr;
n = write(pri->control, &req, sizeof(req));
if (n != sizeof(req)) {
printk(UM_KERN_ERR "daemon_open : control setup request "
"failed, err = %d\n", -errno);
err = -ENOTCONN;
goto out_free;
}
n = read(pri->control, sun, sizeof(*sun));
if (n != sizeof(*sun)) {
printk(UM_KERN_ERR "daemon_open : read of data socket failed, "
"err = %d\n", -errno);
err = -ENOTCONN;
goto out_free;
}
pri->data_addr = sun;
return fd;
out_free:
kfree(sun);
out_close:
close(fd);
out:
close(pri->control);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 348 | 87.44% | 4 | 57.14% |
| Paolo 'Blaisorblade' Giarrusso | 50 | 12.56% | 3 | 42.86% |
| Total | 398 | 100.00% | 7 | 100.00% |
static int daemon_user_init(void *data, void *dev)
{
struct daemon_data *pri = data;
struct timeval tv;
struct {
char zero;
int pid;
int usecs;
} name;
if (!strcmp(pri->sock_type, "unix"))
pri->ctl_addr = new_addr(pri->ctl_sock,
strlen(pri->ctl_sock) + 1);
name.zero = 0;
name.pid = os_getpid();
gettimeofday(&tv, NULL);
name.usecs = tv.tv_usec;
pri->local_addr = new_addr(&name, sizeof(name));
pri->dev = dev;
pri->fd = connect_to_switch(pri);
if (pri->fd < 0) {
kfree(pri->local_addr);
pri->local_addr = NULL;
return pri->fd;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 161 | 100.00% | 2 | 100.00% |
| Total | 161 | 100.00% | 2 | 100.00% |
static int daemon_open(void *data)
{
struct daemon_data *pri = data;
return pri->fd;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
static void daemon_remove(void *data)
{
struct daemon_data *pri = data;
close(pri->fd);
pri->fd = -1;
close(pri->control);
pri->control = -1;
kfree(pri->data_addr);
pri->data_addr = NULL;
kfree(pri->ctl_addr);
pri->ctl_addr = NULL;
kfree(pri->local_addr);
pri->local_addr = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 52 | 61.90% | 2 | 66.67% |
| Paolo 'Blaisorblade' Giarrusso | 32 | 38.10% | 1 | 33.33% |
| Total | 84 | 100.00% | 3 | 100.00% |
int daemon_user_write(int fd, void *buf, int len, struct daemon_data *pri)
{
struct sockaddr_un *data_addr = pri->data_addr;
return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 47 | 100.00% | 1 | 100.00% |
| Total | 47 | 100.00% | 1 | 100.00% |
const struct net_user_info daemon_user_info = {
.init = daemon_user_init,
.open = daemon_open,
.close = NULL,
.remove = daemon_remove,
.add_address = NULL,
.delete_address = NULL,
.mtu = ETH_MAX_PACKET,
.max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 810 | 90.50% | 9 | 64.29% |
| Paolo 'Blaisorblade' Giarrusso | 82 | 9.16% | 4 | 28.57% |
| Al Viro | 3 | 0.34% | 1 | 7.14% |
| Total | 895 | 100.00% | 14 | 100.00% |
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