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-rw-r--r--src/dumm/guest.c682
1 files changed, 0 insertions, 682 deletions
diff --git a/src/dumm/guest.c b/src/dumm/guest.c
deleted file mode 100644
index 327b86c63..000000000
--- a/src/dumm/guest.c
+++ /dev/null
@@ -1,682 +0,0 @@
-/*
- * Copyright (C) 2008-2009 Tobias Brunner
- * Copyright (C) 2007 Martin Willi
- * HSR 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 <sys/types.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <sys/uio.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <dirent.h>
-#include <termios.h>
-#include <stdarg.h>
-
-#include <utils/debug.h>
-#include <collections/linked_list.h>
-
-#include "dumm.h"
-#include "guest.h"
-#include "mconsole.h"
-#include "cowfs.h"
-
-#define PERME (S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH)
-#define PERM (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH)
-
-#define MASTER_DIR "master"
-#define DIFF_DIR "diff"
-#define UNION_DIR "union"
-#define ARGS_FILE "args"
-#define PID_FILE "pid"
-#define KERNEL_FILE "linux"
-#define LOG_FILE "boot.log"
-#define NOTIFY_FILE "notify"
-#define PTYS 0
-
-typedef struct private_guest_t private_guest_t;
-
-struct private_guest_t {
- /** implemented public interface */
- guest_t public;
- /** name of the guest */
- char *name;
- /** directory of guest */
- int dir;
- /** directory name of guest */
- char *dirname;
- /** additional args to pass to guest */
- char *args;
- /** pid of guest child process */
- int pid;
- /** state of guest */
- guest_state_t state;
- /** FUSE cowfs instance */
- cowfs_t *cowfs;
- /** mconsole to control running UML */
- mconsole_t *mconsole;
- /** list of interfaces attached to the guest */
- linked_list_t *ifaces;
-};
-
-ENUM(guest_state_names, GUEST_STOPPED, GUEST_STOPPING,
- "STOPPED",
- "STARTING",
- "RUNNING",
- "PAUSED",
- "STOPPING",
-);
-
-METHOD(guest_t, get_name, char*,
- private_guest_t *this)
-{
- return this->name;
-}
-
-METHOD(guest_t, create_iface, iface_t*,
- private_guest_t *this, char *name)
-{
- enumerator_t *enumerator;
- iface_t *iface;
-
- if (this->state != GUEST_RUNNING)
- {
- DBG1(DBG_LIB, "guest '%s' not running, unable to add interface",
- this->name);
- return NULL;
- }
-
- enumerator = this->ifaces->create_enumerator(this->ifaces);
- while (enumerator->enumerate(enumerator, (void**)&iface))
- {
- if (streq(name, iface->get_guestif(iface)))
- {
- DBG1(DBG_LIB, "guest '%s' already has an interface '%s'",
- this->name, name);
- enumerator->destroy(enumerator);
- return NULL;
- }
- }
- enumerator->destroy(enumerator);
-
- iface = iface_create(name, &this->public, this->mconsole);
- if (iface)
- {
- this->ifaces->insert_last(this->ifaces, iface);
- }
- return iface;
-}
-
-METHOD(guest_t, destroy_iface, void,
- private_guest_t *this, iface_t *iface)
-{
- enumerator_t *enumerator;
- iface_t *current;
-
- enumerator = this->ifaces->create_enumerator(this->ifaces);
- while (enumerator->enumerate(enumerator, (void**)&current))
- {
- if (current == iface)
- {
- this->ifaces->remove_at(this->ifaces, enumerator);
- current->destroy(current);
- break;
- }
- }
- enumerator->destroy(enumerator);
-}
-
-METHOD(guest_t, create_iface_enumerator, enumerator_t*,
- private_guest_t *this)
-{
- return this->ifaces->create_enumerator(this->ifaces);
-}
-
-METHOD(guest_t, get_state, guest_state_t,
- private_guest_t *this)
-{
- return this->state;
-}
-
-METHOD(guest_t, get_pid, pid_t,
- private_guest_t *this)
-{
- return this->pid;
-}
-
-/**
- * write format string to a buffer, and advance buffer position
- */
-static char* write_arg(char **pos, size_t *left, char *format, ...)
-{
- size_t len;
- char *res = NULL;
- va_list args;
-
- va_start(args, format);
- len = vsnprintf(*pos, *left, format, args);
- va_end(args);
- if (len < *left)
- {
- res = *pos;
- len++;
- *pos += len + 1;
- *left -= len + 1;
- }
- return res;
-}
-
-METHOD(guest_t, stop, void,
- private_guest_t *this, idle_function_t idle)
-{
- if (this->state != GUEST_STOPPED)
- {
- this->state = GUEST_STOPPING;
- this->ifaces->destroy_offset(this->ifaces, offsetof(iface_t, destroy));
- this->ifaces = linked_list_create();
- kill(this->pid, SIGINT);
- while (this->state != GUEST_STOPPED)
- {
- if (idle)
- {
- idle();
- }
- else
- {
- usleep(50000);
- }
- }
- unlinkat(this->dir, PID_FILE, 0);
- this->pid = 0;
- }
-}
-
-/**
- * save pid in file
- */
-void savepid(private_guest_t *this)
-{
- FILE *file;
-
- file = fdopen(openat(this->dir, PID_FILE, O_RDWR | O_CREAT | O_TRUNC,
- PERM), "w");
- if (file)
- {
- fprintf(file, "%d", this->pid);
- fclose(file);
- }
-}
-
-METHOD(guest_t, start, bool,
- private_guest_t *this, invoke_function_t invoke, void* data,
- idle_function_t idle)
-{
- char buf[2048];
- char *notify;
- char *pos = buf;
- char *args[32];
- int i = 0;
- size_t left = sizeof(buf);
-
- memset(args, 0, sizeof(args));
-
- if (this->state != GUEST_STOPPED)
- {
- DBG1(DBG_LIB, "unable to start guest in state %N", guest_state_names,
- this->state);
- return FALSE;
- }
- this->state = GUEST_STARTING;
-
- notify = write_arg(&pos, &left, "%s/%s", this->dirname, NOTIFY_FILE);
-
- args[i++] = write_arg(&pos, &left, "nice");
- args[i++] = write_arg(&pos, &left, "%s/%s", this->dirname, KERNEL_FILE);
- args[i++] = write_arg(&pos, &left, "root=/dev/root");
- args[i++] = write_arg(&pos, &left, "rootfstype=hostfs");
- args[i++] = write_arg(&pos, &left, "rootflags=%s/%s", this->dirname, UNION_DIR);
- args[i++] = write_arg(&pos, &left, "uml_dir=%s", this->dirname);
- args[i++] = write_arg(&pos, &left, "umid=%s", this->name);
- args[i++] = write_arg(&pos, &left, "mconsole=notify:%s", notify);
- args[i++] = write_arg(&pos, &left, "con=null");
- if (this->args)
- {
- args[i++] = this->args;
- }
-
- this->pid = invoke(data, &this->public, args, i);
- if (!this->pid)
- {
- this->state = GUEST_STOPPED;
- return FALSE;
- }
- savepid(this);
-
- /* open mconsole */
- this->mconsole = mconsole_create(notify, idle);
- if (this->mconsole == NULL)
- {
- DBG1(DBG_LIB, "opening mconsole at '%s' failed, stopping guest", buf);
- stop(this, NULL);
- return FALSE;
- }
-
- this->state = GUEST_RUNNING;
- return TRUE;
-}
-
-METHOD(guest_t, add_overlay, bool,
- private_guest_t *this, char *path)
-{
- if (path == NULL)
- {
- return FALSE;
- }
-
- if (access(path, F_OK) != 0)
- {
- if (!mkdir_p(path, PERME))
- {
- DBG1(DBG_LIB, "creating overlay for guest '%s' failed: %m",
- this->name);
- return FALSE;
- }
- }
-
- return this->cowfs->add_overlay(this->cowfs, path);
-}
-
-METHOD(guest_t, del_overlay, bool,
- private_guest_t *this, char *path)
-{
- return this->cowfs->del_overlay(this->cowfs, path);
-}
-
-METHOD(guest_t, pop_overlay, bool,
- private_guest_t *this)
-{
- return this->cowfs->pop_overlay(this->cowfs);
-}
-
-/**
- * Variadic version of the exec function
- */
-static int vexec(private_guest_t *this, void(*cb)(void*,char*,size_t), void *data,
- char *cmd, va_list args)
-{
- char buf[1024];
- size_t len;
-
- if (this->mconsole)
- {
- len = vsnprintf(buf, sizeof(buf), cmd, args);
-
- if (len > 0 && len < sizeof(buf))
- {
- return this->mconsole->exec(this->mconsole, cb, data, buf);
- }
- }
- return -1;
-}
-
-METHOD(guest_t, exec, int,
- private_guest_t *this, void(*cb)(void*,char*,size_t), void *data,
- char *cmd, ...)
-{
- int res;
- va_list args;
- va_start(args, cmd);
- res = vexec(this, cb, data, cmd, args);
- va_end(args);
- return res;
-}
-
-typedef struct {
- chunk_t buf;
- void (*cb)(void*,char*);
- void *data;
-} exec_str_t;
-
-/**
- * callback that combines chunks to a string. if a callback is given, the string
- * is split at newlines and the callback is called for each line.
- */
-static void exec_str_cb(exec_str_t *data, char *buf, size_t len)
-{
- if (!data->buf.ptr)
- {
- data->buf = chunk_alloc(len + 1);
- memcpy(data->buf.ptr, buf, len);
- data->buf.ptr[len] = '\0';
- }
- else
- {
- size_t newlen = strlen(data->buf.ptr) + len + 1;
- if (newlen > data->buf.len)
- {
- data->buf.ptr = realloc(data->buf.ptr, newlen);
- data->buf.len = newlen;
- }
- strncat(data->buf.ptr, buf, len);
- }
-
- if (data->cb)
- {
- char *nl;
- while ((nl = strchr(data->buf.ptr, '\n')) != NULL)
- {
- *nl++ = '\0';
- data->cb(data->data, data->buf.ptr);
- memmove(data->buf.ptr, nl, strlen(nl) + 1);
- }
- }
-}
-
-METHOD(guest_t, exec_str, int,
- private_guest_t *this, void(*cb)(void*,char*), bool lines, void *data,
- char *cmd, ...)
-{
- int res;
- va_list args;
- va_start(args, cmd);
- if (cb)
- {
- exec_str_t exec = { chunk_empty, NULL, NULL };
- if (lines)
- {
- exec.cb = cb;
- exec.data = data;
- }
- res = vexec(this, (void(*)(void*,char*,size_t))exec_str_cb, &exec, cmd, args);
- if (exec.buf.ptr)
- {
- if (!lines || strlen(exec.buf.ptr) > 0)
- {
- /* return the complete string or the remaining stuff in the
- * buffer (i.e. when there was no newline at the end) */
- cb(data, exec.buf.ptr);
- }
- chunk_free(&exec.buf);
- }
- }
- else
- {
- res = vexec(this, NULL, NULL, cmd, args);
- }
- va_end(args);
- return res;
-}
-
-METHOD(guest_t, sigchild, void,
- private_guest_t *this)
-{
- DESTROY_IF(this->mconsole);
- this->mconsole = NULL;
- this->state = GUEST_STOPPED;
-}
-
-/**
- * umount the union filesystem
- */
-static bool umount_unionfs(private_guest_t *this)
-{
- if (this->cowfs)
- {
- this->cowfs->destroy(this->cowfs);
- this->cowfs = NULL;
- return TRUE;
- }
- return FALSE;
-}
-
-/**
- * mount the union filesystem
- */
-static bool mount_unionfs(private_guest_t *this)
-{
- char master[PATH_MAX];
- char diff[PATH_MAX];
- char mount[PATH_MAX];
-
- if (this->cowfs == NULL)
- {
- snprintf(master, sizeof(master), "%s/%s", this->dirname, MASTER_DIR);
- snprintf(diff, sizeof(diff), "%s/%s", this->dirname, DIFF_DIR);
- snprintf(mount, sizeof(mount), "%s/%s", this->dirname, UNION_DIR);
-
- this->cowfs = cowfs_create(master, diff, mount);
- if (this->cowfs)
- {
- return TRUE;
- }
- }
- return FALSE;
-}
-
-/**
- * load args configuration from file
- */
-char *loadargs(private_guest_t *this)
-{
- FILE *file;
- char buf[512], *args = NULL;
-
- file = fdopen(openat(this->dir, ARGS_FILE, O_RDONLY, PERM), "r");
- if (file)
- {
- if (fgets(buf, sizeof(buf), file))
- {
- args = strdup(buf);
- }
- fclose(file);
- }
- return args;
-}
-
-/**
- * save args configuration to file
- */
-bool saveargs(private_guest_t *this, char *args)
-{
- FILE *file;
- bool retval = FALSE;
-
- file = fdopen(openat(this->dir, ARGS_FILE, O_RDWR | O_CREAT | O_TRUNC,
- PERM), "w");
- if (file)
- {
- if (fprintf(file, "%s", args) > 0)
- {
- retval = TRUE;
- }
- fclose(file);
- }
- return retval;
-}
-
-METHOD(guest_t, destroy, void,
- private_guest_t *this)
-{
- stop(this, NULL);
- umount_unionfs(this);
- if (this->dir > 0)
- {
- close(this->dir);
- }
- this->ifaces->destroy(this->ifaces);
- free(this->dirname);
- free(this->args);
- free(this->name);
- free(this);
-}
-
-/**
- * generic guest constructor
- */
-static private_guest_t *guest_create_generic(char *parent, char *name,
- bool create)
-{
- char cwd[PATH_MAX];
- private_guest_t *this;
-
- INIT(this,
- .public = {
- .get_name = _get_name,
- .get_pid = _get_pid,
- .get_state = _get_state,
- .create_iface = _create_iface,
- .destroy_iface = _destroy_iface,
- .create_iface_enumerator = _create_iface_enumerator,
- .start = _start,
- .stop = _stop,
- .add_overlay = _add_overlay,
- .del_overlay = _del_overlay,
- .pop_overlay = _pop_overlay,
- .exec = _exec,
- .exec_str = _exec_str,
- .sigchild = _sigchild,
- .destroy = _destroy,
- }
- );
-
- if (*parent == '/' || getcwd(cwd, sizeof(cwd)) == NULL)
- {
- if (asprintf(&this->dirname, "%s/%s", parent, name) < 0)
- {
- this->dirname = NULL;
- }
- }
- else
- {
- if (asprintf(&this->dirname, "%s/%s/%s", cwd, parent, name) < 0)
- {
- this->dirname = NULL;
- }
- }
- if (this->dirname == NULL)
- {
- free(this);
- return NULL;
- }
- if (create)
- {
- mkdir(this->dirname, PERME);
- }
- this->dir = open(this->dirname, O_DIRECTORY, PERME);
- if (this->dir < 0)
- {
- DBG1(DBG_LIB, "opening guest directory '%s' failed: %m", this->dirname);
- free(this->dirname);
- free(this);
- return NULL;
- }
- this->state = GUEST_STOPPED;
- this->ifaces = linked_list_create();
- this->name = strdup(name);
-
- return this;
-}
-
-/**
- * create a symlink to old called new in our working dir
- */
-static bool make_symlink(private_guest_t *this, char *old, char *new)
-{
- char cwd[PATH_MAX];
- char buf[PATH_MAX];
-
- if (*old == '/' || getcwd(cwd, sizeof(cwd)) == NULL)
- {
- snprintf(buf, sizeof(buf), "%s", old);
- }
- else
- {
- snprintf(buf, sizeof(buf), "%s/%s", cwd, old);
- }
- return symlinkat(buf, this->dir, new) == 0;
-}
-
-
-/**
- * create the guest instance, including required dirs and mounts
- */
-guest_t *guest_create(char *parent, char *name, char *kernel,
- char *master, char *args)
-{
- private_guest_t *this = guest_create_generic(parent, name, TRUE);
-
- if (this == NULL)
- {
- return NULL;
- }
-
- if (!make_symlink(this, master, MASTER_DIR) ||
- !make_symlink(this, kernel, KERNEL_FILE))
- {
- DBG1(DBG_LIB, "creating master/kernel symlink failed: %m");
- destroy(this);
- return NULL;
- }
-
- if (mkdirat(this->dir, UNION_DIR, PERME) != 0 ||
- mkdirat(this->dir, DIFF_DIR, PERME) != 0)
- {
- DBG1(DBG_LIB, "unable to create directories for '%s': %m", name);
- destroy(this);
- return NULL;
- }
-
- this->args = args;
- if (args && !saveargs(this, args))
- {
- destroy(this);
- return NULL;
- }
-
- if (!mount_unionfs(this))
- {
- destroy(this);
- return NULL;
- }
-
- return &this->public;
-}
-
-/**
- * load an already created guest
- */
-guest_t *guest_load(char *parent, char *name)
-{
- private_guest_t *this = guest_create_generic(parent, name, FALSE);
-
- if (this == NULL)
- {
- return NULL;
- }
-
- this->args = loadargs(this);
-
- if (!mount_unionfs(this))
- {
- destroy(this);
- return NULL;
- }
-
- return &this->public;
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 03:59:27 +0000