#include "mkdir.h"
#include "dev-setup.h"
#include "def.h"
+#include "label.h"
typedef enum MountMode {
/* This is ordered by priority! */
"/dev/tty\0";
char temporary_mount[] = "/tmp/namespace-dev-XXXXXX";
- const char *d, *dev = NULL, *devpts = NULL, *devshm = NULL, *devkdbus = NULL, *devhugepages = NULL, *devmqueue = NULL;
+ const char *d, *dev = NULL, *devpts = NULL, *devshm = NULL, *devkdbus = NULL, *devhugepages = NULL, *devmqueue = NULL, *devlog = NULL, *devptmx = NULL;
_cleanup_umask_ mode_t u;
int r;
goto fail;
}
+ devptmx = strappenda(temporary_mount, "/dev/ptmx");
+ symlink("pts/ptmx", devptmx);
+
devshm = strappenda(temporary_mount, "/dev/shm");
mkdir(devshm, 01777);
r = mount("/dev/shm", devshm, NULL, MS_BIND, NULL);
mkdir(devhugepages, 0755);
mount("/dev/hugepages", devhugepages, NULL, MS_BIND, NULL);
+ devlog = strappenda(temporary_mount, "/dev/log");
+ symlink("/run/systemd/journal/dev-log", devlog);
+
NULSTR_FOREACH(d, devnodes) {
_cleanup_free_ char *dn = NULL;
struct stat st;
goto fail;
}
+ label_context_set(d, st.st_mode);
r = mknod(dn, st.st_mode, st.st_rdev);
+ label_context_clear();
+
if (r < 0) {
r = -errno;
goto fail;
switch (m->mode) {
- case PRIVATE_DEV:
- return mount_dev(m);
-
case INACCESSIBLE:
+
+ /* First, get rid of everything that is below if there
+ * is anything... Then, overmount it with an
+ * inaccessible directory. */
+ umount_recursive(m->path, 0);
+
what = "/run/systemd/inaccessible";
break;
case READONLY:
case READWRITE:
- what = m->path;
- break;
+ /* Nothing to mount here, we just later toggle the
+ * MS_RDONLY bit for the mount point */
+ return 0;
case PRIVATE_TMP:
what = tmp_dir;
what = var_tmp_dir;
break;
+ case PRIVATE_DEV:
+ return mount_dev(m);
+
default:
assert_not_reached("Unknown mode");
}
if (r >= 0)
log_debug("Successfully mounted %s to %s", what, m->path);
else if (m->ignore && errno == ENOENT)
- r = 0;
+ return 0;
return r;
}
assert(m);
- if (m->mode != INACCESSIBLE && m->mode != READONLY)
- return 0;
+ if (IN_SET(m->mode, INACCESSIBLE, READONLY))
+ r = bind_remount_recursive(m->path, true);
+ else if (m->mode == READWRITE)
+ r = bind_remount_recursive(m->path, false);
+ else
+ r = 0;
- r = mount(NULL, m->path, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY|MS_REC, NULL);
- if (r < 0 && !(m->ignore && errno == ENOENT))
- return -errno;
+ if (m->ignore && r == -ENOENT)
+ return 0;
- return 0;
+ return r;
}
int setup_namespace(
char* tmp_dir,
char* var_tmp_dir,
bool private_dev,
+ ProtectHome protect_home,
+ ProtectSystem protect_system,
unsigned mount_flags) {
BindMount *m, *mounts = NULL;
strv_length(read_write_dirs) +
strv_length(read_only_dirs) +
strv_length(inaccessible_dirs) +
- private_dev;
+ private_dev +
+ (protect_home != PROTECT_HOME_NO ? 3 : 0) +
+ (protect_system != PROTECT_SYSTEM_NO ? 2 : 0) +
+ (protect_system == PROTECT_SYSTEM_FULL ? 1 : 0);
if (n > 0) {
m = mounts = (BindMount *) alloca(n * sizeof(BindMount));
m++;
}
+ if (protect_home != PROTECT_HOME_NO) {
+ r = append_mounts(&m, STRV_MAKE("-/home", "-/run/user", "-/root"), protect_home == PROTECT_HOME_READ_ONLY ? READONLY : INACCESSIBLE);
+ if (r < 0)
+ return r;
+ }
+
+ if (protect_system != PROTECT_SYSTEM_NO) {
+ r = append_mounts(&m, protect_system == PROTECT_SYSTEM_FULL ? STRV_MAKE("/usr", "-/boot", "/etc") : STRV_MAKE("/usr", "-/boot"), READONLY);
+ if (r < 0)
+ return r;
+ }
+
assert(mounts + n == m);
qsort(mounts, n, sizeof(BindMount), mount_path_compare);
return r;
}
+
+static const char *const protect_home_table[_PROTECT_HOME_MAX] = {
+ [PROTECT_HOME_NO] = "no",
+ [PROTECT_HOME_YES] = "yes",
+ [PROTECT_HOME_READ_ONLY] = "read-only",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(protect_home, ProtectHome);
+
+static const char *const protect_system_table[_PROTECT_SYSTEM_MAX] = {
+ [PROTECT_SYSTEM_NO] = "no",
+ [PROTECT_SYSTEM_YES] = "yes",
+ [PROTECT_SYSTEM_FULL] = "full",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(protect_system, ProtectSystem);