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core: move the code that setups namespaces on its own function

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This commit is contained in:
Djalal Harouni 2016-10-27 09:20:18 +02:00
parent 342d3ac165
commit 93c6bb51b6
1 changed files with 54 additions and 47 deletions
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101
src/core/execute.c
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@ -2003,6 +2003,59 @@ static int compile_read_write_paths(
return 0;
}
static int apply_mount_namespace(Unit *u, const ExecContext *context,
const ExecParameters *params,
ExecRuntime *runtime) {
int r;
_cleanup_free_ char **rw = NULL;
char *tmp = NULL, *var = NULL;
const char *root_dir = NULL;
NameSpaceInfo ns_info = {
.private_dev = context->private_devices,
.protect_control_groups = context->protect_control_groups,
.protect_kernel_tunables = context->protect_kernel_tunables,
.protect_kernel_modules = context->protect_kernel_modules,
};
/* The runtime struct only contains the parent of the private /tmp,
* which is non-accessible to world users. Inside of it there's a /tmp
* that is sticky, and that's the one we want to use here. */
if (context->private_tmp && runtime) {
if (runtime->tmp_dir)
tmp = strjoina(runtime->tmp_dir, "/tmp");
if (runtime->var_tmp_dir)
var = strjoina(runtime->var_tmp_dir, "/tmp");
}
r = compile_read_write_paths(context, params, &rw);
if (r < 0)
return r;
if (params->flags & EXEC_APPLY_CHROOT)
root_dir = context->root_directory;
r = setup_namespace(root_dir, &ns_info, rw,
context->read_only_paths,
context->inaccessible_paths,
tmp,
var,
context->protect_home,
context->protect_system,
context->mount_flags);
/* If we couldn't set up the namespace this is probably due to a
* missing capability. In this case, silently proceeed. */
if (IN_SET(r, -EPERM, -EACCES)) {
log_open();
log_unit_debug_errno(u, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m");
log_close();
r = 0;
}
return r;
}
static void append_socket_pair(int *array, unsigned *n, int pair[2]) {
assert(array);
assert(n);
@ -2466,57 +2519,11 @@ static int exec_child(
needs_mount_namespace = exec_needs_mount_namespace(context, params, runtime);
if (needs_mount_namespace) {
_cleanup_free_ char **rw = NULL;
char *tmp = NULL, *var = NULL;
NameSpaceInfo ns_info = {
.private_dev = context->private_devices,
.protect_control_groups = context->protect_control_groups,
.protect_kernel_tunables = context->protect_kernel_tunables,
.protect_kernel_modules = context->protect_kernel_modules,
};
/* The runtime struct only contains the parent
* of the private /tmp, which is
* non-accessible to world users. Inside of it
* there's a /tmp that is sticky, and that's
* the one we want to use here. */
if (context->private_tmp && runtime) {
if (runtime->tmp_dir)
tmp = strjoina(runtime->tmp_dir, "/tmp");
if (runtime->var_tmp_dir)
var = strjoina(runtime->var_tmp_dir, "/tmp");
}
r = compile_read_write_paths(context, params, &rw);
r = apply_mount_namespace(unit, context, params, runtime);
if (r < 0) {
*exit_status = EXIT_NAMESPACE;
return r;
}
r = setup_namespace(
(params->flags & EXEC_APPLY_CHROOT) ? context->root_directory : NULL,
&ns_info,
rw,
context->read_only_paths,
context->inaccessible_paths,
tmp,
var,
context->protect_home,
context->protect_system,
context->mount_flags);
/* If we couldn't set up the namespace this is
* probably due to a missing capability. In this case,
* silently proceeed. */
if (r == -EPERM || r == -EACCES) {
log_open();
log_unit_debug_errno(unit, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m");
log_close();
} else if (r < 0) {
*exit_status = EXIT_NAMESPACE;
return r;
}
}
if (context->working_directory_home)