#include "log.h"
#include "seccomp-oci.h"
#include "cgroups.h"
+#include "netifd.h"
#include <libubox/blobmsg.h>
#include <libubox/blobmsg_json.h>
#endif
#define STACK_SIZE (1024 * 1024)
-#define OPT_ARGS "S:C:n:h:r:w:d:psulocU:G:NR:fFO:T:EyJ:iP:"
+#define OPT_ARGS "cC:d:EfFG:h:ij:J:ln:NoO:pP:r:R:sS:uU:w:T:y"
#define OCI_VERSION_STRING "1.0.2"
/* use PTY slave for stdio */
slave_console_fd = open(console_fname, O_RDWR); /* | O_NOCTTY */
+ if (slave_console_fd < 0)
+ goto no_console;
+
dup2(slave_console_fd, 0);
dup2(slave_console_fd, 1);
dup2(slave_console_fd, 2);
create_dev_console(jail_root);
/* make sure /etc/resolv.conf exists if in new network namespace */
- if (!opts.extroot && opts.namespace & CLONE_NEWNET) {
+ if (opts.namespace & CLONE_NEWNET) {
char jailetc[PATH_MAX], jaillink[PATH_MAX];
snprintf(jailetc, PATH_MAX, "%s/etc", jail_root);
return CLONE_NEWPID;
else if (!strcmp("network", type))
return CLONE_NEWNET;
+ else if (!strcmp("net", type))
+ return CLONE_NEWNET;
else if (!strcmp("mount", type))
return CLONE_NEWNS;
else if (!strcmp("ipc", type))
return 0;
}
+/*
+ * join namespace of existing PID
+ * The string argument is the reference PID followed by ':' and a
+ * ',' separated list of namespaces to to join.
+ */
+static int jail_join_ns(char *arg)
+{
+ pid_t pid;
+ int fd;
+ int nstype;
+ char *tmp, *etmp, *nspath;
+ int *setns;
+
+ tmp = strchr(arg, ':');
+ if (!tmp)
+ return EINVAL;
+
+ *tmp = '\0';
+ pid = atoi(arg);
+
+ do {
+ ++tmp;
+ etmp = strchr(tmp, ',');
+ if (etmp)
+ *etmp = '\0';
+
+ nstype = resolve_nstype(tmp);
+ if (!nstype)
+ return EINVAL;
+
+ if (opts.namespace & nstype)
+ return ENOTUNIQ;
+
+ setns = get_namespace_fd(nstype);
+
+ if (!setns)
+ return EFAULT;
+
+ if (*setns != -1)
+ return ENOTUNIQ;
+
+ if (asprintf(&nspath, "/proc/%d/ns/%s", pid, tmp) < 0)
+ return ENOMEM;
+
+ fd = open(nspath, O_RDONLY);
+ free(nspath);
+
+ if (fd < 0)
+ return errno?:ESTALE;
+
+ *setns = fd;
+
+ if (etmp)
+ tmp = etmp;
+ else
+ tmp = NULL;
+ } while (tmp);
+
+ return 0;
+}
+
static void get_jail_root_user(bool is_gidmap, uint32_t container_id, uint32_t host_id, uint32_t size)
{
if (container_id == 0 && size >= 1)
if (tb[OCI_LINUX_CGROUPSPATH]) {
cgpath = blobmsg_get_string(tb[OCI_LINUX_CGROUPSPATH]);
if (cgpath[0] == '/') {
- if (strlen(cgpath) >= (sizeof(cgfullpath) - strlen(cgfullpath)))
+ if (strlen(cgpath) + 1 >= (sizeof(cgfullpath) - strlen(cgfullpath)))
return E2BIG;
strcat(cgfullpath, cgpath);
} else {
strcat(cgfullpath, "/containers/");
- strcat(cgfullpath, opts.name); /* should be container name rather than jail name */
- strcat(cgfullpath, "/");
- if (strlen(cgpath) >= (sizeof(cgfullpath) - strlen(cgfullpath)))
+ if (strlen(opts.name) + strlen(cgpath) + 2 >= (sizeof(cgfullpath) - strlen(cgfullpath)))
return E2BIG;
+ strcat(cgfullpath, opts.name); /* should be container name rather than jail name */
+ strcat(cgfullpath, "/");
strcat(cgfullpath, cgpath);
}
} else {
strcat(cgfullpath, "/containers/");
+ if (2 * strlen(opts.name) + 2 >= (sizeof(cgfullpath) - strlen(cgfullpath)))
+ return E2BIG;
+
strcat(cgfullpath, opts.name); /* should be container name rather than jail name */
strcat(cgfullpath, "/");
strcat(cgfullpath, opts.name); /* should be container instance name rather than jail name */
const char ubus[] = "/var/run/ubus/ubus.sock";
int ret = EXIT_FAILURE;
int ch;
+ char *tmp;
if (uid) {
ERROR("not root, aborting: %m\n");
return EXIT_FAILURE;
}
+ /* those are filehandlers, so -1 indicates unused */
+ opts.setns.pid = -1;
+ opts.setns.net = -1;
+ opts.setns.ns = -1;
+ opts.setns.ipc = -1;
+ opts.setns.uts = -1;
+ opts.setns.user = -1;
+ opts.setns.cgroup = -1;
+#ifdef CLONE_NEWTIME
+ opts.setns.time = -1;
+#endif
+
umask(022);
mount_list_init();
init_library_search();
opts.namespace |= CLONE_NEWUTS;
opts.hostname = strdup(optarg);
break;
+ case 'j':
+ jail_join_ns(optarg);
+ break;
case 'r':
opts.namespace |= CLONE_NEWNS;
- add_path_and_deps(optarg, 1, 0, 0);
+ tmp = strchr(optarg, ':');
+ if (tmp) {
+ *(tmp++) = '\0';
+ add_2paths_and_deps(optarg, tmp, 1, 0, 0);
+ } else {
+ add_path_and_deps(optarg, 1, 0, 0);
+ }
break;
case 'w':
opts.namespace |= CLONE_NEWNS;
- add_path_and_deps(optarg, 0, 0, 0);
+ tmp = strchr(optarg, ':');
+ if (tmp) {
+ *(tmp++) = '\0';
+ add_2paths_and_deps(optarg, tmp, 0, 0, 0);
+ } else {
+ add_path_and_deps(optarg, 0, 0, 0);
+ }
break;
case 'u':
opts.namespace |= CLONE_NEWNS;
if (opts.namespace && !opts.ocibundle)
opts.namespace |= CLONE_NEWIPC | CLONE_NEWPID;
- /* those are filehandlers, so -1 indicates unused */
- opts.setns.pid = -1;
- opts.setns.net = -1;
- opts.setns.ns = -1;
- opts.setns.ipc = -1;
- opts.setns.uts = -1;
- opts.setns.user = -1;
- opts.setns.cgroup = -1;
-#ifdef CLONE_NEWTIME
- opts.setns.time = -1;
-#endif
-
/*
* uid in parent user namespace representing root user in new
* user namespace, defaults to nobody unless specified in uidMappings
ret=EXIT_FAILURE;
goto errout;
}
- if (!(opts.ocibundle||opts.namespace||opts.capabilities||opts.seccomp)) {
+ if (!(opts.ocibundle||opts.namespace||opts.capabilities||opts.seccomp||
+ (opts.setns.net != -1) ||
+ (opts.setns.ns != -1) ||
+ (opts.setns.ipc != -1) ||
+ (opts.setns.uts != -1) ||
+ (opts.setns.user != -1) ||
+ (opts.setns.cgroup != -1))) {
ERROR("Not using namespaces, capabilities or seccomp !!!\n\n");
usage();
ret=EXIT_FAILURE;
/* deliberately not using 'else' on unrelated conditional branches */
if (!opts.ocibundle) {
/* allocate NULL-terminated array for argv */
- opts.jail_argv = calloc(1 + argc - optind, sizeof(char**));
+ opts.jail_argv = calloc(1 + argc - optind, sizeof(void *));
if (!opts.jail_argv) {
ret=EXIT_FAILURE;
goto errout;
if (!opts.extroot)
add_mount_bind("/etc/nsswitch.conf", 1, -1);
#endif
+ if (opts.setns.ns == -1) {
+ if (!(opts.namespace & CLONE_NEWNET)) {
+ add_mount_bind("/etc/resolv.conf", 1, 0);
+ } else {
+ /* new mount namespace to provide /dev/resolv.conf.d */
+ char hostdir[PATH_MAX];
- if (!(opts.namespace & CLONE_NEWNET)) {
- add_mount_bind("/etc/resolv.conf", 1, 0);
- } else if (opts.setns.ns == -1) {
- /* new mount namespace to provide /dev/resolv.conf.d */
- char hostdir[PATH_MAX];
-
- snprintf(hostdir, PATH_MAX, "/tmp/resolv.conf-%s.d", opts.name);
- mkdir_p(hostdir, 0755);
- add_mount(hostdir, "/dev/resolv.conf.d", NULL, MS_BIND | MS_NOEXEC | MS_NOATIME | MS_NOSUID | MS_NODEV | MS_RDONLY, 0, NULL, 0);
+ snprintf(hostdir, PATH_MAX, "/tmp/resolv.conf-%s.d", opts.name);
+ mkdir_p(hostdir, 0755);
+ add_mount(hostdir, "/dev/resolv.conf.d", NULL,
+ MS_BIND | MS_NOEXEC | MS_NOATIME | MS_NOSUID | MS_NODEV | MS_RDONLY, 0, NULL, 0);
+ }
}
-
/* default mounts */
add_mount(NULL, "/dev", "tmpfs", MS_NOATIME | MS_NOEXEC | MS_NOSUID, 0, "size=1M", -1);
add_mount(NULL, "/dev/pts", "devpts", MS_NOATIME | MS_NOEXEC | MS_NOSUID, 0, "newinstance,ptmxmode=0666,mode=0620,gid=5", 0);
}
if (opts.namespace & CLONE_NEWNET) {
+ jail_network_start(parent_ctx, opts.name, jail_process.pid);
netns_fd = ns_open_pid("net", jail_process.pid);
netns_updown(jail_process.pid, true);
}
if (opts.namespace & CLONE_NEWNET) {
setns(netns_fd, CLONE_NEWNET);
netns_updown(getpid(), false);
+ jail_network_stop();
close(netns_fd);
}
run_hooks(opts.hooks.poststop, post_poststop);
projects / project / procd.git / blobdiff