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added dynamic interface manipulation for guests

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management of tap devices on the host
This commit is contained in:
Martin Willi
2007-07-25 13:23:45 +00:00
parent 5c7da9d402
commit f85fdda835
10 changed files with 886 additions and 38 deletions
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src/dumm/main.c
+221 -19
View File
@@ -1,3 +1,18 @@
/*
* Copyright (C) 2007 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#define _GNU_SOURCE
#include <stdio.h>
@@ -20,7 +35,7 @@ static void usage()
}
/**
* show usage information (commandline arguments)
* help for dumm root shell
*/
static void help()
{
@@ -29,15 +44,29 @@ static void help()
printf(" kernel=<uml-kernel>\n");
printf(" master=<read-only root files>\n");
printf(" memory=<guest memory in MB>\n");
printf("guests list running guests\n");
printf("list list running guests\n");
printf("guest <name> open guest menu for <name>\n");
printf("help show this help\n");
printf("quit kill quests and exit\n");
}
/**
* help for guest shell
*/
static void help_guest()
{
printf("addif <name> add an interface to the guest\n");
printf("delif <name> remove the interface\n");
printf("listif list guests interfaces\n");
printf("help show this help\n");
printf("quit quit the guest menu\n");
}
/**
* start an UML guest
*/
static void start(umli_t *umli, char *line)
static void start(dumm_t *dumm, char *line)
{
enum {
NAME = 0,
@@ -101,7 +130,7 @@ static void start(umli_t *umli, char *line)
mem = 128;
}
if (umli->start_guest(umli, name, kernel, master, mem))
if (dumm->start_guest(dumm, name, kernel, master, mem))
{
printf("starting guest '%s'\n", name);
}
@@ -112,19 +141,187 @@ static void start(umli_t *umli, char *line)
}
/**
* list running UML guests
* add an iface to a guest
*/
static void guests(umli_t *umli)
static void add_if(guest_t *guest, char *name)
{
iterator_t *iterator;
guest_t *guest;
iface_t *iface;
iterator = umli->create_guest_iterator(umli);
while (iterator->iterate(iterator, (void**)&guest))
iface = guest->create_iface(guest, name);
if (iface)
{
printf("%s\n", guest->get_name(guest));
printf("created guest interface '%s' connected to '%s'\n",
iface->get_guest(iface), iface->get_host(iface));
}
else
{
printf("failed to create guest interface\n");
}
}
/**
* delete an iface from a guest
*/
static void del_if(guest_t *guest, char *name)
{
iface_t *iface;
iterator_t *iterator;
bool found = FALSE;
iterator = guest->create_iface_iterator(guest);
while (iterator->iterate(iterator, (void**)&iface))
{
if (streq(name, iface->get_guest(iface)))
{
iterator->remove(iterator);
printf("removing interface '%s' ('%s') from %s\n",
iface->get_guest(iface), iface->get_host(iface),
guest->get_name(guest));
iface->destroy(iface);
found = TRUE;
break;
}
}
iterator->destroy(iterator);
if (!found)
{
printf("guest '%s' has no interface named '%s'\n",
guest->get_name(guest), name);
}
}
/**
* list interfaces on a guest
*/
static void list_if(guest_t *guest)
{
iface_t *iface;
iterator_t *iterator;
iterator = guest->create_iface_iterator(guest);
while (iterator->iterate(iterator, (void**)&iface))
{
printf("'%s' => '%s'\n", iface->get_guest(iface), iface->get_host(iface));
}
iterator->destroy(iterator);
}
/**
* subshell for guests
*/
static void guest(dumm_t *dumm, char *name)
{
char *line = NULL;
char prompt[32];
int len;
iterator_t *iterator;
guest_t *guest;
bool found = FALSE;
iterator = dumm->create_guest_iterator(dumm);
while (iterator->iterate(iterator, (void**)&guest))
{
if (streq(name, guest->get_name(guest)))
{
found = TRUE;
}
}
iterator->destroy(iterator);
if (!found)
{
printf("guest '%s' not found\n", name);
return;
}
len = snprintf(prompt, sizeof(prompt), "dumm@%s# ", name);
if (len < 0 || len >= sizeof(prompt))
{
return;
}
while (TRUE)
{
enum {
QUIT = 0,
HELP,
ADDIF,
DELIF,
LISTIF,
};
char *const opts[] = {
[QUIT] = "quit",
[HELP] = "help",
[ADDIF] = "addif",
[DELIF] = "delif",
[LISTIF] = "listif",
NULL
};
char *pos, *value;
free(line);
line = readline(prompt);
if (line == NULL || *line == '\0')
{
continue;
}
add_history(line);
pos = line;
while (*pos != '\0')
{
if (*pos == ' ')
{
*pos = ',';
}
pos++;
}
pos = line;
switch (getsubopt(&pos, opts, &value))
{
case QUIT:
free(line);
break;
case HELP:
help_guest();
continue;
case ADDIF:
add_if(guest, pos);
continue;
case DELIF:
del_if(guest, pos);
continue;
case LISTIF:
list_if(guest);
continue;
default:
printf("command unknown: '%s'\n", line);
continue;
}
break;
}
}
/**
* list running UML guests
*/
static void list(dumm_t *dumm)
{
iterator_t *guests, *ifaces;
guest_t *guest;
iface_t *iface;
guests = dumm->create_guest_iterator(dumm);
while (guests->iterate(guests, (void**)&guest))
{
printf("%s\n", guest->get_name(guest));
ifaces = guest->create_iface_iterator(guest);
while (ifaces->iterate(ifaces, (void**)&iface))
{
printf(" '%s' => '%s'\n", iface->get_guest(iface), iface->get_host(iface));
}
ifaces->destroy(ifaces);
}
guests->destroy(guests);
}
/**
@@ -132,7 +329,7 @@ static void guests(umli_t *umli)
*/
int main(int argc, char *argv[])
{
umli_t *umli;
dumm_t *dumm;
char *line = NULL;
while (TRUE)
@@ -164,7 +361,7 @@ int main(int argc, char *argv[])
break;
}
umli = umli_create();
dumm = dumm_create();
while (TRUE)
{
@@ -172,13 +369,15 @@ int main(int argc, char *argv[])
QUIT = 0,
HELP,
START,
GUESTS,
LIST,
GUEST,
};
char *const opts[] = {
[QUIT] = "quit",
[HELP] = "help",
[START] = "start",
[GUESTS] = "guests",
[LIST] = "list",
[GUEST] = "guest",
NULL
};
char *pos, *value;
@@ -210,10 +409,13 @@ int main(int argc, char *argv[])
help();
continue;
case START:
start(umli, pos);
start(dumm, pos);
continue;
case GUESTS:
guests(umli);
case LIST:
list(dumm);
continue;
case GUEST:
guest(dumm, pos);
continue;
default:
printf("command unknown: '%s'\n", line);
@@ -221,7 +423,7 @@ int main(int argc, char *argv[])
}
break;
}
umli->destroy(umli);
dumm->destroy(dumm);
clear_history();
return 0;
}