+++ /dev/null
-/*
- * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
-#include <popt.h>
-#include <sched.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <common/compat/tid.h>
-
-#include "signal-helper.h"
-#include "utils.h"
-
-#define LTTNG_PROC_NS_PATH_MAX 40
-
-/*
- * The runner of this test validates that the kernel supports the
- * namespace for which it is invoked. However, these defines are added
- * to allow tests to run on systems that support a given namespace,
- * but that use a libc that doesn't define its associated clone flag.
- */
-#ifndef CLONE_NEWNS
-#define CLONE_NEWNS 0x00020000
-#endif
-#ifndef CLONE_NEWCGROUP
-#define CLONE_NEWCGROUP 0x02000000
-#endif
-#ifndef CLONE_NEWUTS
-#define CLONE_NEWUTS 0x04000000
-#endif
-#ifndef CLONE_NEWIPC
-#define CLONE_NEWIPC 0x08000000
-#endif
-#ifndef CLONE_NEWUSER
-#define CLONE_NEWUSER 0x10000000
-#endif
-#ifndef CLONE_NEWPID
-#define CLONE_NEWPID 0x20000000
-#endif
-#ifndef CLONE_NEWNET
-#define CLONE_NEWNET 0x40000000
-#endif
-#ifndef CLONE_NEWTIME
-#define CLONE_NEWTIME 0x00000080
-#endif
-
-static int debug = 0;
-static char *ns_opt = NULL;
-static char *before_unshare_wait_file_path = NULL;
-static char *after_unshare_wait_file_path = NULL;
-static char *after_unshare_signal_file_path = NULL;
-
-static struct poptOption opts[] = {
- /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
- { "debug", 'd', POPT_ARG_NONE, &debug, 0, "Enable debug output", NULL },
- { "ns", 'n', POPT_ARG_STRING, &ns_opt, 0, "Namespace short identifier", NULL },
- { "before", 'b', POPT_ARG_STRING, &before_unshare_wait_file_path, 0, "Wait for file before unshare", NULL },
- { "after", 'a', POPT_ARG_STRING, &after_unshare_wait_file_path, 0, "Wait for file after unshare", NULL },
- { "signal", 's', POPT_ARG_STRING, &after_unshare_signal_file_path, 0, "Create signal file after unshare", NULL },
- POPT_AUTOHELP
- { NULL, 0, 0, NULL, 0 }
-};
-
-static void debug_printf(const char *format, ...)
-{
- va_list args;
- va_start(args, format);
-
- if (debug) {
- vfprintf(stderr, format, args);
- }
-
- va_end(args);
-}
-
-static int get_ns_inum(const char *ns, ino_t *ns_inum)
-{
- int ret = 0;
- struct stat sb;
- char proc_ns_path[LTTNG_PROC_NS_PATH_MAX];
-
- /*
- * /proc/thread-self was introduced in kernel v3.17
- */
- if (snprintf(proc_ns_path, LTTNG_PROC_NS_PATH_MAX,
- "/proc/thread-self/ns/%s", ns) >= 0) {
- if (stat(proc_ns_path, &sb) == 0) {
- *ns_inum = sb.st_ino;
- } else {
- ret = -1;
- }
- goto end;
- }
-
- if (snprintf(proc_ns_path, LTTNG_PROC_NS_PATH_MAX,
- "/proc/self/task/%d/%s/net", lttng_gettid(), ns) >= 0) {
- if (stat(proc_ns_path, &sb) == 0) {
- *ns_inum = sb.st_ino;
- } else {
- ret = -1;
- }
- goto end;
- }
-end:
- return ret;
-}
-
-static int do_the_needful(int ns_flag, const char *ns_str)
-{
- int ret = 0;
- ino_t ns1, ns2;
-
- ret = get_ns_inum(ns_str, &ns1);
- if (ret) {
- debug_printf("Failed to get ns inode number for namespace %s",
- ns_str);
- ret = -1;
- goto end;
- }
- debug_printf("Initial %s ns inode number: %lu\n", ns_str, ns1);
-
- /* Wait on synchronization before unshare. */
- if (before_unshare_wait_file_path) {
- ret = wait_on_file(before_unshare_wait_file_path);
- if (ret != 0) {
- goto end;
- }
- }
-
- ret = unshare(ns_flag);
- if (ret == -1) {
- perror("Failed to unshare namespace");
- goto end;
- }
-
- ret = get_ns_inum(ns_str, &ns2);
- if (ret) {
- debug_printf("Failed to get ns inode number for namespace %s",
- ns_str);
- ret = -1;
- goto end;
- }
- debug_printf("Post unshare %s ns inode number: %lu\n", ns_str, ns2);
-
- /* Signal that the unshare call is completed. */
- if (after_unshare_signal_file_path) {
- ret = create_file(after_unshare_signal_file_path);
- if (ret != 0) {
- goto end;
- }
- }
-
- /* Wait on synchronization after unshare. */
- if (after_unshare_wait_file_path) {
- ret = wait_on_file(after_unshare_wait_file_path);
- if (ret != 0) {
- goto end;
- }
- }
-
-end:
- return ret;
-}
-
-int main(int argc, const char **argv)
-{
- int opt;
- int ret = EXIT_SUCCESS;
- poptContext pc;
-
- pc = poptGetContext(NULL, argc, argv, opts, 0);
- poptReadDefaultConfig(pc, 0);
-
- if (argc < 2) {
- poptPrintHelp(pc, stderr, 0);
- ret = EXIT_FAILURE;
- goto end;
- }
-
- while ((opt = poptGetNextOpt(pc)) >= 0) {
- switch (opt) {
- default:
- poptPrintUsage(pc, stderr, 0);
- ret = EXIT_FAILURE;
- goto end;
- }
- }
-
- if (opt < -1) {
- /* an error occurred during option processing */
- poptPrintUsage(pc, stderr, 0);
- fprintf(stderr, "%s: %s\n",
- poptBadOption(pc, POPT_BADOPTION_NOALIAS),
- poptStrerror(opt));
- ret = EXIT_FAILURE;
- goto end;
- }
-
- if (ns_opt == NULL) {
- poptPrintUsage(pc, stderr, 0);
- ret = EXIT_FAILURE;
- goto end;
- }
-
- if (set_signal_handler()) {
- ret = EXIT_FAILURE;
- goto end;
- }
-
- if (strncmp(ns_opt, "cgroup", 6) == 0) {
- ret = do_the_needful(CLONE_NEWCGROUP, "cgroup");
- } else if (strncmp(ns_opt, "ipc", 3) == 0) {
- ret = do_the_needful(CLONE_NEWIPC, "ipc");
- } else if (strncmp(ns_opt, "mnt", 3) == 0) {
- ret = do_the_needful(CLONE_NEWNS, "mnt");
- } else if (strncmp(ns_opt, "net", 3) == 0) {
- ret = do_the_needful(CLONE_NEWNET, "net");
- } else if (strncmp(ns_opt, "pid", 3) == 0) {
- ret = do_the_needful(CLONE_NEWPID, "pid");
- } else if (strncmp(ns_opt, "time", 4) == 0) {
- ret = do_the_needful(CLONE_NEWTIME, "time");
- } else if (strncmp(ns_opt, "user", 4) == 0) {
- /*
- * Will always fail, requires a single threaded application,
- * which can't happen with UST.
- */
- ret = do_the_needful(CLONE_NEWUSER, "user");
- } else if (strncmp(ns_opt, "uts", 3) == 0) {
- ret = do_the_needful(CLONE_NEWUTS, "uts");
- } else {
- printf("invalid ns id\n");
- ret = EXIT_FAILURE;
- goto end;
- }
- ret = ret ? EXIT_FAILURE : EXIT_SUCCESS;
-end:
- poptFreeContext(pc);
- return ret;
-}
projects / lttng-tools.git / blobdiff