+++ /dev/null
-/*
- * lxc: linux Container library
- *
- * (C) Copyright IBM Corp. 2007, 2008
- *
- * Authors:
- * Daniel Lezcano <dlezcano at fr.ibm.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#define _GNU_SOURCE
-#include <stdio.h>
-#undef _GNU_SOURCE
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <dirent.h>
-#include <mntent.h>
-#include <unistd.h>
-
-#include <sys/types.h>
-#include <sys/utsname.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/mount.h>
-#include <sys/mman.h>
-
-#include <arpa/inet.h>
-#include <fcntl.h>
-#include <netinet/in.h>
-#include <net/if.h>
-
-#include <network.h>
-#include <list.h>
-#include <conf.h>
-#include <log.h>
-#include <lxc.h>
-
-#define MAXHWLEN 18
-#define MAXINDEXLEN 20
-#define MAXLINELEN 128
-
-typedef int (*instanciate_cb)(const char *dirname,
- const char *file, pid_t pid);
-
-typedef int (*dir_cb)(const char *name, const char *dirname,
- const char *file, void *data);
-
-typedef int (*file_cb)(void* buffer, void *data);
-
-struct netdev_conf {
- const char *type;
- instanciate_cb cb;
- int count;
-};
-
-static int instanciate_veth(const char *, const char *, pid_t);
-static int instanciate_macvlan(const char *, const char *, pid_t);
-static int instanciate_phys(const char *, const char *, pid_t);
-
-static struct netdev_conf netdev_conf[] = {
- { "veth", instanciate_veth, 0 },
- { "macvlan", instanciate_macvlan, 0, },
- { "phys", instanciate_phys, 0, },
-};
-
-static int dir_filter(const struct dirent *dirent)
-{
- if (!strcmp(dirent->d_name, ".") ||
- !strcmp(dirent->d_name, ".."))
- return 0;
- return 1;
-}
-
-static int dir_for_each(const char *name, const char *dirname,
- dir_cb callback, void *data)
-{
- struct dirent **namelist;
- int n;
-
- n = scandir(dirname, &namelist, dir_filter, alphasort);
- if (n < 0) {
- lxc_log_syserror("failed to scan %s directory", dirname);
- return -1;
- }
-
- while (n--) {
- if (callback(name, dirname, namelist[n]->d_name, data)) {
- lxc_log_error("callback failed");
- free(namelist[n]);
- return -1;
- }
- free(namelist[n]);
- }
-
- return 0;
-}
-
-static int file_for_each_line(const char *file, file_cb callback,
- void *buffer, size_t len, void* data)
-{
- FILE *f;
- int err = -1;
-
- f = fopen(file, "r");
- if (!f) {
- lxc_log_syserror("failed to open %s", file);
- return -1;
- }
-
- while (fgets(buffer, len, f))
- if (callback(buffer, data))
- goto out;
- err = 0;
-out:
- fclose(f);
- return err;
-}
-
-static int write_info(const char *path, const char *file, const char *info)
-{
- int fd, err = -1;
- char *f;
-
- asprintf(&f, "%s/%s", path, file);
- fd = creat(f, 0755);
- if (fd < 0)
- goto out;
-
- if (write(fd, info, strlen(info)) < 0 ||
- write(fd, "\n", strlen("\n") + 1) < 0)
- goto out_write;
- err = 0;
-out:
- close(fd);
- free(f);
- return err;
-
-out_write:
- unlink(f);
- goto out;
-}
-
-static int read_info(const char *path, const char *file, char *info, size_t len)
-{
- int fd, ret = -1;
- char *f, *token;
-
- asprintf(&f, "%s/%s", path, file);
- fd = open(f, O_RDONLY);
- if (fd < 0) {
- if (errno == ENOENT)
- ret = 1;
- goto out;
- }
-
- ret = read(fd, info, len);
- if (ret < 0)
- goto out;
-
- token = strstr(info, "\n");
- if (token)
- *token = '\0';
- ret = 0;
-out:
- close(fd);
- free(f);
- return ret;
-}
-
-static int delete_info(const char *path, const char *file)
-{
- char *info;
- int ret;
-
- asprintf(&info, "%s/%s", path, file);
- ret = unlink(info);
- free(info);
-
- return ret;
-}
-
-static int configure_ip_address(const char *path, struct list *ip, int family)
-{
- struct list *iterator;
- char *file = NULL, *line = NULL;
- char addr[INET6_ADDRSTRLEN];
- char bcast[INET_ADDRSTRLEN];
- int fd, err = -1;
-
- if (mkdir(path, 0755)) {
- lxc_log_syserror("failed to create directory %s", path);
- return -1;
- }
-
- asprintf(&file, "%s/addresses", path);
- fd = creat(file, 0755);
- if (fd < 0) {
- lxc_log_syserror("failed to create %s file", file);
- goto err;
- }
-
- if (family == AF_INET) {
- struct inetdev *in;
-
- list_for_each(iterator, ip) {
-
- in = iterator->elem;
-
- if (!inet_ntop(family, &in->addr, addr, sizeof(addr))) {
- lxc_log_syserror("failed to convert ipv4 address");
- goto err;
- }
-
- if (!inet_ntop(family, &in->bcast, bcast, sizeof(bcast))) {
- lxc_log_syserror("failed to convert ipv4 broadcast");
- goto err;
- }
-
-
- if (in->prefix)
- asprintf(&line, "%s/%d %s\n", addr,
- in->prefix, bcast);
- else
- asprintf(&line, "%s %s\n", addr, bcast);
-
- if (write(fd, line, strlen(line)) < 0) {
- lxc_log_syserror("failed to write address info");
- goto err;
- }
- }
- } else {
- struct inet6dev *in6;
-
- list_for_each(iterator, ip) {
-
- in6 = iterator->elem;
-
- if (!inet_ntop(family, &in6->addr, addr, sizeof(addr))) {
- lxc_log_syserror("failed to convert ipv4 address");
- goto err;
- }
-
- asprintf(&line, "%s/%d\n", addr,
- in6->prefix?in6->prefix:64);
-
- if (write(fd, line, strlen(line)) < 0) {
- lxc_log_syserror("failed to write address info to %s",
- file);
- goto err;
- }
- }
- }
-
- err = 0;
-out:
- free(file);
- free(line);
- close(fd);
- return err;
-err:
- unlink(file);
- rmdir(path);
- goto out;
-}
-
-static int configure_netdev(const char *path, struct netdev *netdev)
-{
- int err = -1;
- char dir[MAXPATHLEN];
-
- if (mkdir(path, 0755)) {
- lxc_log_syserror("failed to create %s directory", path);
- return -1;
- }
-
- if (netdev->ifname) {
- if (write_info(path, "link", netdev->ifname))
- goto out_link;
- }
-
- if (netdev->newname) {
- if (write_info(path, "name", netdev->newname))
- goto out_newname;
- }
-
- if (netdev->hwaddr) {
- if (write_info(path, "hwaddr", netdev->hwaddr))
- goto out_up;
- }
-
- if (netdev->flags & IFF_UP) {
- if (write_info(path, "up", ""))
- goto out_hwaddr;
- }
-
- if (!list_empty(&netdev->ipv4)) {
- snprintf(dir, MAXPATHLEN, "%s/ipv4", path);
- if (configure_ip_address(dir, &netdev->ipv4, AF_INET))
- goto out_ipv4;
- }
-
- if (!list_empty(&netdev->ipv6)) {
- snprintf(dir, MAXPATHLEN, "%s/ipv6", path);
- if (configure_ip_address(dir, &netdev->ipv6, AF_INET6))
- goto out_ipv6;
- }
- err = 0;
-out:
- return err;
-out_ipv6:
- delete_info(path, "ipv4");
-out_ipv4:
- delete_info(path, "up");
-out_hwaddr:
- delete_info(path, "hwaddr");
-out_up:
- delete_info(path, "name");
-out_newname:
- delete_info(path, "link");
-out_link:
- rmdir(path);
- goto out;
-}
-
-static int configure_utsname(const char *name, struct utsname *utsname)
-{
- char path[MAXPATHLEN];
-
- if (!utsname)
- return 0;
-
- snprintf(path, MAXPATHLEN, LXCPATH "/%s", name);
- if (write_info(path, "utsname", utsname->nodename)) {
- lxc_log_error("failed to write the utsname info");
- return -1;
- }
-
- return 0;
-}
-
-static int configure_network(const char *name, struct list *network)
-{
- struct list *iterator;
- struct network *n;
- char *networkpath = NULL, *path = NULL;
- int err = -1;
-
- if (list_empty(network))
- return 0;
-
- asprintf(&networkpath, LXCPATH "/%s/network", name);
- if (mkdir(networkpath, 0755)) {
- lxc_log_syserror("failed to create %s directory", networkpath);
- goto out;
- }
-
- list_for_each(iterator, network) {
-
- n = iterator->elem;
-
- if (n->type < 0 || n->type > MAXCONFTYPE) {
- lxc_log_error("invalid network configuration type %d",
- n->type);
- goto out;
- }
-
- asprintf(&path, "%s/%s%d", networkpath,
- netdev_conf[n->type].type, netdev_conf[n->type].count++);
-
- if (configure_netdev(path, list_first_elem(&n->netdev))) {
- lxc_log_error("failed to configure network type %s",
- netdev_conf[n->type].type);
- goto out;
- }
- }
-
- err = 0;
-out:
- free(path);
- free(networkpath);
- return err;
-}
-
-static int configure_cgroup(const char *name, struct cgroup *cgroup)
-{
- if (!cgroup)
- return 0;
- return 0;
-}
-
-static int configure_chroot(const char *name, const char *chroot)
-{
- int ret;
- char *path;
-
- if (!chroot)
- return 0;
-
- asprintf(&path, LXCPATH "/%s/chroot", name);
- ret = symlink(chroot, path);
- free(path);
-
- return ret;
-}
-
-static int configure_mount(const char *name, const char *fstab)
-{
- char *path;
- struct stat stat;
- int infd, outfd;
- void *src, *dst;
- char c = '\0';
- int ret = -1;
-
- if (!fstab)
- return 0;
-
- asprintf(&path, LXCPATH "/%s/fstab", name);
-
- outfd = open(path, O_RDWR|O_CREAT|O_EXCL, 0640);
- if (outfd < 0) {
- lxc_log_syserror("failed to creat '%s'", path);
- goto out;
- }
-
- infd = open(fstab, O_RDONLY);
- if (infd < 0) {
- lxc_log_syserror("failed to open '%s'", fstab);
- goto out;
- }
-
- if (fstat(infd, &stat)) {
- lxc_log_syserror("failed to stat '%s'", fstab);
- goto out;
- }
-
- if (lseek(outfd, stat.st_size - 1, SEEK_SET) < 0) {
- lxc_log_syserror("failed to seek dest file '%s'", path);
- goto out;
- }
-
- /* fixup length */
- if (write(outfd, &c, 1) < 0) {
- lxc_log_syserror("failed to write to '%s'", path);
- goto out;
- }
-
- src = mmap(NULL, stat.st_size, PROT_READ, MAP_SHARED, infd, 0L);
- if (src == MAP_FAILED) {
- lxc_log_syserror("failed to mmap '%s'", fstab);
- goto out;
- }
-
- dst = mmap(NULL, stat.st_size, PROT_WRITE, MAP_SHARED, outfd, 0L);
- if (dst == MAP_FAILED) {
- lxc_log_syserror("failed to mmap '%s'", path);
- goto out;
- }
-
- memcpy(dst, src, stat.st_size);
-
- munmap(src, stat.st_size);
- munmap(dst, stat.st_size);
-
- ret = 0;
-out:
- free(path);
- return ret;
-}
-
-static int unconfigure_ip_addresses(const char *dirname)
-{
- char path[MAXPATHLEN];
-
- snprintf(path, MAXPATHLEN, "%s/ipv4", dirname);
- delete_info(path, "addresses");
- rmdir(path);
-
- snprintf(path, MAXPATHLEN, "%s/ipv6", dirname);
- delete_info(path, "addresses");
- rmdir(path);
-
- return 0;
-}
-
-static int unconfigure_network_cb(const char *name, const char *dirname,
- const char *file, void *data)
-{
- char *path;
-
- asprintf(&path, "%s/%s", dirname, file);
- delete_info(path, "name");
- delete_info(path, "addr");
- delete_info(path, "link");
- delete_info(path, "hwaddr");
- delete_info(path, "up");
- unconfigure_ip_addresses(path);
- rmdir(path);
- free(path);
-
- return 0;
-}
-
-static int unconfigure_network(const char *name)
-{
- char *dirname;
-
- if (!conf_has_network(name))
- return 0;
-
- asprintf(&dirname, LXCPATH "/%s/network", name);
- dir_for_each(name, dirname, unconfigure_network_cb, NULL);
- rmdir(dirname);
- free(dirname);
-
- return 0;
-}
-
-static int unconfigure_cgroup(const char *name)
-{
- return 0;
-}
-
-static int unconfigure_chroot(const char *name)
-{
- char *path;
-
- asprintf(&path, LXCPATH "/%s", name);
- delete_info(path, "chroot");
- free(path);
-
- return 0;
-}
-
-static int unconfigure_mount(const char *name)
-{
- char *path;
-
- if (!conf_has_fstab(name))
- return 0;
-
- asprintf(&path, LXCPATH "/%s", name);
- delete_info(path, "fstab");
- free(path);
-
- return 0;
-}
-
-static int unconfigure_utsname(const char *name)
-{
- char *path;
-
- if (!conf_has_utsname(name))
- return 0;
-
- asprintf(&path, LXCPATH "/%s", name);
- delete_info(path, "utsname");
- free(path);
-
- return 0;
-}
-
-static int setup_utsname(const char *name)
-{
- int ret;
- char *path;
- struct utsname utsname;
-
- if (!conf_has_utsname(name))
- return 0;
-
- asprintf(&path, LXCPATH "/%s", name);
-
- ret = read_info(path, "utsname", utsname.nodename,
- sizeof(utsname.nodename));
- if (ret < 0) {
- lxc_log_syserror("failed to read utsname info");
- goto out;
- }
-
- if (!ret && sethostname(utsname.nodename, strlen(utsname.nodename))) {
- lxc_log_syserror("failed to set the hostname to '%s'",
- utsname.nodename);
- goto out;
- }
-
- ret = 0;
-out:
- free(path);
- return ret;
-}
-
-static int setup_chroot(const char *name)
-{
- char *path, chrt[MAXPATHLEN];
- int ret = -1;
-
- asprintf(&path, LXCPATH "/%s/chroot", name);
-
- if (readlink(path, chrt, MAXPATHLEN) > 0) {
- if (chroot(chrt)) {
- lxc_log_syserror("failed to set chroot %s", path);
- goto out;
- }
- if (chdir(getenv("HOME")) && chdir("/")) {
- lxc_log_syserror("failed to change to home directory");
- goto out;
- }
- }
-
- ret = 0;
-out:
- free(path);
- return ret;
-}
-
-static int setup_mount(const char *name)
-{
- char *path;
- struct mntent *mntent;
- FILE *file;
- int ret = -1;
-
- if (!conf_has_fstab(name))
- return 0;
-
- asprintf(&path, LXCPATH "/%s/fstab", name);
-
- file = setmntent(path, "r");
- if (!file) {
- if (errno == ENOENT)
- return 0;
- lxc_log_syserror("failed to open '%s'", path);
- goto out;
- }
-
- while((mntent = getmntent(file))) {
- if (mount(mntent->mnt_fsname, mntent->mnt_dir,
- mntent->mnt_type, 0, NULL)) {
- lxc_log_syserror("failed to mount '%s' on '%s'",
- mntent->mnt_fsname, mntent->mnt_dir);
- goto out;
- }
- }
- ret = 0;
-out:
- free(path);
- endmntent(file);
- return ret;
-}
-
-static int setup_ipv4_addr_cb(void *buffer, void *data)
-{
- char *ifname = data;
- char *cursor, *slash, *addr, *bcast = NULL, *prefix = NULL;
- int p = 24;
-
- addr = buffer;
- cursor = strstr(addr, " ");
- if (cursor) {
- *cursor = '\0';
- bcast = cursor + 1;
- cursor = strstr(bcast, "\n");
- if (cursor)
- *cursor = '\0';
- }
-
- slash = strstr(addr, "/");
- if (slash) {
- *slash = '\0';
- prefix = slash + 1;
- }
-
- if (prefix)
- p = atoi(prefix);
-
- if (ip_addr_add(ifname, addr, p, bcast)) {
- lxc_log_error("failed to set %s to addr %s/%d %s", ifname,
- addr, p, bcast?bcast:"");
- return -1;
- }
-
- return 0;
-}
-
-static int setup_ipv6_addr_cb(void *buffer, void *data)
-{
- char *ifname = data;
- char *cursor, *slash, *addr, *bcast = NULL, *prefix = NULL;
- int p = 24;
-
- addr = buffer;
- cursor = strstr(addr, " ");
- if (cursor) {
- *cursor = '\0';
- bcast = cursor + 1;
- cursor = strstr(bcast, "\n");
- if (cursor)
- *cursor = '\0';
- }
-
- slash = strstr(addr, "/");
- if (slash) {
- *slash = '\0';
- prefix = slash + 1;
- }
-
- if (prefix)
- p = atoi(prefix);
-
- if (ip6_addr_add(ifname, addr, p, bcast)) {
- lxc_log_error("failed to set %s to addr %s/%d %s", ifname,
- addr, p, bcast?bcast:"");
- return -1;
- }
-
- return 0;
-}
-
-static int setup_hw_addr(char *hwaddr, const char *ifname)
-{
- struct sockaddr sockaddr;
- struct ifreq ifr;
- int ret, fd;
-
- if (lxc_convert_mac(hwaddr, &sockaddr)) {
- fprintf(stderr, "conversion has failed\n");
- return -1;
- }
-
- memcpy(ifr.ifr_name, ifname, IFNAMSIZ);
- memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr));
-
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (fd < 0) {
- perror("socket");
- return -1;
- }
-
- ret = ioctl(fd, SIOCSIFHWADDR, &ifr);
- close(fd);
- if (ret)
- perror("ioctl");
-
- return ret;
-}
-
-static int setup_ip_addr(const char *dirname, const char *ifname)
-{
- char *path, line[MAXLINELEN];
- struct stat s;
- int ret = 0;
-
- asprintf(&path, "%s/ipv4/addresses", dirname);
- if (!stat(path, &s))
- ret = file_for_each_line(path, setup_ipv4_addr_cb,
- line, MAXPATHLEN, (void*)ifname);
- free(path);
-
- return ret;
-}
-
-static int setup_ip6_addr(const char *dirname, const char *ifname)
-{
- char *path, line[MAXLINELEN];
- struct stat s;
- int ret = 0;
-
- asprintf(&path, "%s/ipv6/addresses", dirname);
- if (!stat(path, &s))
- ret = file_for_each_line(path, setup_ipv6_addr_cb,
- line, MAXPATHLEN, (void*)ifname);
- free(path);
-
- return ret;
-}
-
-static int setup_network_cb(const char *name, const char *dirname,
- const char *file, void *data)
-{
- char path[MAXPATHLEN];
- char strindex[MAXINDEXLEN];
- char ifname[IFNAMSIZ];
- char newname[IFNAMSIZ];
- char hwaddr[MAXHWLEN];
- char *current_ifname = ifname;
- int ifindex, ret = -1;
-
- snprintf(path, MAXPATHLEN, "%s/%s", dirname, file);
-
- if (read_info(path, "ifindex", strindex, sizeof(strindex))) {
- lxc_log_error("failed to read ifindex info");
- goto out;
- }
-
- ifindex = atoi(strindex);
- if (!ifindex) {
- if (!read_info(path, "up", strindex, sizeof(strindex))
- if (device_up("lo")) {
- lxc_log_error("failed to set the loopback up");
- return -1;
- }
- return 0;
- }
-
- if (!if_indextoname(ifindex, current_ifname)) {
- lxc_log_error("no interface corresponding to index '%d'",
- ifindex);
- return -1;
- }
-
- if (!read_info(path, "name", newname, sizeof(newname))) {
- if (device_rename(ifname, newname)) {
- lxc_log_error("failed to rename %s->%s",
- ifname, newname);
- return -1;
- }
- current_ifname = newname;
- }
-
- if (!read_info(path, "hwaddr", hwaddr, sizeof(hwaddr))) {
- if (setup_hw_addr(hwaddr, current_ifname)) {
- lxc_log_error("failed to setup hw address for '%s'",
- current_ifname);
- return -1;
- }
- }
-
- if (setup_ip_addr(path, current_ifname)) {
- lxc_log_error("failed to setup ip addresses for '%s'",
- ifname);
- return -1;
- }
-
- if (setup_ip6_addr(path, current_ifname)) {
- lxc_log_error("failed to setup ipv6 addresses for '%s'",
- ifname);
- return -1;
- }
-
- if (!read_info(path, "up", strindex, sizeof(strindex))) {
- if (device_up(current_ifname)) {
- lxc_log_error("failed to set '%s' up", current_ifname);
- return -1;
- }
-
- /* the network is up, make the loopback up too */
- if (device_up("lo")) {
- lxc_log_error("failed to set the loopback up");
- return -1;
- }
- }
-
- return 0;
-}
-
-static int setup_network(const char *name)
-{
- char *dirname;
- int ret = -1;
-
- if (!conf_has_network(name))
- return 0;
-
- asprintf(&dirname, LXCPATH "/%s/network", name);
- ret = dir_for_each(name, dirname, setup_network_cb, NULL);
- free(dirname);
- return ret;
-}
-
-int conf_has(const char *name, const char *info)
-{
- int ret;
- char *path;
- struct stat st;
-
- asprintf(&path, LXCPATH "/%s/%s", name, info);
-
- ret = stat(path, &st);
- if (!ret) {
- ret = 1;
- goto out;
- }
-
- if (errno == ENOENT) {
- ret = 0;
- goto out;
- }
-
- lxc_log_syserror("failed to stat %s info", info);
-out:
- free(path);
- return ret;
-}
-
-int lxc_configure(const char *name, struct lxc_conf *conf)
-{
- if (!conf)
- return 0;
-
- if (configure_utsname(name, conf->utsname)) {
- lxc_log_error("failed to configure the utsname");
- return -1;
- }
-
- if (configure_network(name, &conf->networks)) {
- lxc_log_error("failed to configure the network");
- return -1;
- }
-
- if (configure_cgroup(name, conf->cgroup)) {
- lxc_log_error("failed to configure the control group");
- return -1;
- }
-
- if (configure_chroot(name, conf->chroot)) {
- lxc_log_error("failed to configure the chroot");
- return -1;
- }
-
- if (configure_mount(name, conf->fstab)) {
- lxc_log_error("failed to configure the mount points");
- return -1;
- }
-
- return 0;
-}
-
-int lxc_unconfigure(const char *name)
-{
- if (unconfigure_utsname(name))
- lxc_log_error("failed to cleanup utsname");
-
- if (unconfigure_network(name))
- lxc_log_error("failed to cleanup the network");
-
- if (unconfigure_cgroup(name))
- lxc_log_error("failed to cleanup cgroup");
-
- if (unconfigure_chroot(name))
- lxc_log_error("failed to cleanup chroot");
-
- if (unconfigure_mount(name))
- lxc_log_error("failed to cleanup mount");
-
- return 0;
-}
-
-static int instanciate_veth(const char *dirname, const char *file, pid_t pid)
-{
- char *path = NULL, *strindex = NULL, *veth1 = NULL, *veth2 = NULL;
- char bridge[IFNAMSIZ];
- int ifindex, ret = -1;
-
- asprintf(&veth1, "%s_%d", file, pid);
- asprintf(&veth2, "%s~%d", file, pid);
- asprintf(&path, "%s/%s", dirname, file);
-
- if (read_info(path, "link", bridge, IFNAMSIZ)) {
- lxc_log_error("failed to read bridge info");
- goto out;
- }
-
- if (lxc_configure_veth(veth1, veth2, bridge)) {
- lxc_log_error("failed to create %s-%s/%s", veth1, veth2, bridge);
- goto out;
- }
-
- ifindex = if_nametoindex(veth2);
- if (!ifindex) {
- lxc_log_error("failed to retrieve the index for %s", veth2);
- goto out;
- }
-
- asprintf(&strindex, "%d", ifindex);
- if (write_info(path, "ifindex", strindex)) {
- lxc_log_error("failed to write interface index to %s", path);
- goto out;
- }
-
- if (!read_info(path, "up", strindex, sizeof(strindex))) {
- if (device_up(veth1)) {
- lxc_log_error("failed to set %s up", veth1);
- goto out;
- }
- }
-
- ret = 0;
-out:
- free(path);
- free(strindex);
- free(veth1);
- free(veth2);
- return ret;
-}
-static int instanciate_macvlan(const char *dirname, const char *file, pid_t pid)
-{
- char path[MAXPATHLEN], *strindex = NULL, *peer = NULL;
- char link[IFNAMSIZ];
- int ifindex, ret = -1;
-
- asprintf(&peer, "%s~%d", file, pid);
- snprintf(path, MAXPATHLEN, "%s/%s", dirname, file);
- if (read_info(path, "link", link, IFNAMSIZ)) {
- lxc_log_error("failed to read bridge info");
- goto out;
- }
-
- if (lxc_configure_macvlan(link, peer)) {
- lxc_log_error("failed to create macvlan interface %s", peer);
- goto out;
- }
-
- ifindex = if_nametoindex(peer);
- if (!ifindex) {
- lxc_log_error("failed to retrieve the index for %s", peer);
- goto out;
- }
-
- asprintf(&strindex, "%d", ifindex);
- if (write_info(path, "ifindex", strindex)) {
- lxc_log_error("failed to write interface index to %s", path);
- goto out;
- }
-
- ret = 0;
-out:
- free(strindex);
- return ret;
-}
-
-static int instanciate_phys(const char *dirname, const char *file, pid_t pid)
-{
- char path[MAXPATHLEN], *strindex = NULL;
- char link[IFNAMSIZ];
- int ifindex, ret = -1;
-
- snprintf(path, MAXPATHLEN, "%s/%s", dirname, file);
- if (read_info(path, "link", link, IFNAMSIZ)) {
- lxc_log_error("failed to read link info");
- goto out;
- }
-
- ifindex = if_nametoindex(link);
- if (!ifindex) {
- lxc_log_error("failed to retrieve the index for %s", link);
- goto out;
- }
-
- asprintf(&strindex, "%d", ifindex);
- if (write_info(path, "ifindex", strindex)) {
- lxc_log_error("failed to write interface index to %s", path);
- goto out;
- }
-
- ret = 0;
-out:
- free(strindex);
- return ret;
-}
-
-static int instanciate_empty(const char *dirname, const char *file, pid_t pid)
-{
- char path[MAXPATHLEN], *strindex = NULL;
- int ret = -1;
-
- snprintf(path, MAXPATHLEN, "%s/%s", dirname, file);
- if (!asprintf(&strindex, "%d", 0)) {
- lxc_log_error("not enough memory");
- return -1;
- }
-
- if (write_info(path, "ifindex", strindex)) {
- lxc_log_error("failed to write interface index to %s", path);
- goto out;
- }
-
- ret = 0;
-out:
- free(strindex);
- return ret;
-}
-
-static int instanciate_netdev_cb(const char *name, const char *dirname,
- const char *file, void *data)
-{
- pid_t *pid = data;
-
- if (!strncmp("veth", file, strlen("veth")))
- return instanciate_veth(dirname, file, *pid);
- else if (!strncmp("macvlan", file, strlen("macvlan")))
- return instanciate_macvlan(dirname, file, *pid);
- else if (!strncmp("phys", file, strlen("phys")))
- return instanciate_phys(dirname, file, *pid);
- else if (!strncmp("empty", file, strlen("empty"))
- return instanciate_empty(dirname, file, *pid);
- return -1;
-}
-
-static int instanciate_netdev(const char *name, pid_t pid)
-{
- char *dirname;
- int ret;
-
- asprintf(&dirname, LXCPATH "/%s/network", name);
- ret = dir_for_each(name, dirname, instanciate_netdev_cb, &pid);
- free(dirname);
-
- return ret;
-}
-
-static int move_netdev_cb(const char *name, const char *dirname,
- const char *file, void *data)
-{
- char path[MAXPATHLEN], ifname[IFNAMSIZ], strindex[MAXINDEXLEN];
- pid_t *pid = data;
- int ifindex, ret = -1;
-
- snprintf(path, MAXPATHLEN, "%s/%s", dirname, file);
- if (read_info(path, "ifindex", strindex, MAXINDEXLEN) < 0) {
- lxc_log_error("failed to read index to from %s", path);
- goto out;
- }
-
- ifindex = atoi(strindex);
- if (!ifindex)
- return 0;
-
- if (!if_indextoname(ifindex, ifname)) {
- lxc_log_error("interface with index %d does not exist",
- ifindex);
- return -1;
- }
-
- if (device_move(ifname, *pid)) {
- lxc_log_error("failed to move %s to %d", ifname, *pid);
- return -1;
- }
-
- return 0;
-}
-
-static int move_netdev(const char *name, pid_t pid)
-{
- char *dirname;
- int ret;
-
- asprintf(&dirname, LXCPATH "/%s/network", name);
- ret = dir_for_each(name, dirname, move_netdev_cb, &pid);
- free(dirname);
-
- return ret;
-}
-
-int conf_create_network(const char *name, pid_t pid)
-{
- if (instanciate_netdev(name, pid)) {
- lxc_log_error("failed to instantiate the network devices");
- return -1;
- }
-
- if (move_netdev(name, pid)) {
- lxc_log_error("failed to move the netdev to the container");
- return -1;
- }
-
- return 0;
-}
-
-static int delete_netdev_cb(const char *name, const char *dirname,
- const char *file, void *data)
-{
- char strindex[MAXINDEXLEN];
- char path[MAXPATHLEN];
- char ifname[IFNAMSIZ];
- int i, ifindex;
-
- snprintf(path, MAXPATHLEN, "%s/%s", dirname, file);
-
- if (read_info(path, "ifindex", strindex, MAXINDEXLEN)) {
- lxc_log_error("failed to read ifindex info");
- return -1;
- }
-
- ifindex = atoi(strindex);
- if (!ifindex) {
- lxc_log_error("bad index %s", strindex);
- return -1;
- }
-
- /* TODO : temporary code - needs wait on namespace */
- for (i = 0; i < 120; i++) {
- if (if_indextoname(ifindex, ifname))
- break;
- if (!i)
- printf("waiting for interface #%d to come back\n", ifindex);
- else
- printf("."); fflush(stdout);
- sleep(1);
- }
-
- /* do not delete a physical network device */
- if (strncmp("phys", file, strlen("phys")))
- if (device_delete(ifname)) {
- lxc_log_error("failed to remove the netdev %s", ifname);
- }
-
- delete_info(path, "ifindex");
-
- return 0;
-}
-
-static int delete_netdev(const char *name)
-{
- char *dirname;
- int ret;
-
- asprintf(&dirname, LXCPATH "/%s/network", name);
- ret = dir_for_each(name, dirname, delete_netdev_cb, NULL);
- free(dirname);
-
- return ret;
-}
-
-int conf_destroy_network(const char *name)
-{
- if (delete_netdev(name)) {
- lxc_log_error("failed to remove the network devices");
- return -1;
- }
-
- return 0;
-}
-
-int lxc_setup(const char *name)
-{
- if (setup_utsname(name)) {
- lxc_log_error("failed to setup the utsname for '%s'", name);
- return -1;
- }
-
- if (setup_network(name)) {
- lxc_log_error("failed to setup the network for '%s'", name);
- return -1;
- }
-
- if (setup_mount(name)) {
- lxc_log_error("failed to setup the mount points for '%s'", name);
- return -1;
- }
-
- if (setup_chroot(name)) {
- lxc_log_error("failed to set chroot for '%s'", name);
- return -1;
- }
-
- return 0;
-}
projects / mirror_lxc.git / commitdiff