Tests: add UST namespace context change tests
authorMichael Jeanson <mjeanson@efficios.com>
Mon, 1 Apr 2019 15:53:57 +0000 (11:53 -0400)
committerJérémie Galarneau <jeremie.galarneau@efficios.com>
Wed, 23 Oct 2019 22:47:09 +0000 (18:47 -0400)
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
.gitignore
configure.ac
tests/regression/Makefile.am
tests/regression/ust/namespaces/Makefile.am
tests/regression/ust/namespaces/test_ns_contexts_change [new file with mode: 0755]
tests/utils/testapp/Makefile.am
tests/utils/testapp/gen-ust-events-ns/Makefile.am [new file with mode: 0644]
tests/utils/testapp/gen-ust-events-ns/gen-ust-events-ns.c [new file with mode: 0644]
tests/utils/testapp/gen-ust-events-ns/tp.c [new file with mode: 0644]
tests/utils/testapp/gen-ust-events-ns/tp.h [new file with mode: 0644]

index 5a300a6c6ada4e769a770f7420dc4200fbee1940..c62f4d53a99126f73be2247c5c1bedb146fc0851 100644 (file)
@@ -125,6 +125,7 @@ health_check
 /tests/regression/ust/multi-lib/exec-without-callsites
 /tests/utils/testapp/gen-syscall-events-callstack/gen-syscall-events-callstack
 /tests/utils/testapp/gen-ust-events/gen-ust-events
+/tests/utils/testapp/gen-ust-events-ns/gen-ust-events-ns
 /tests/utils/testapp/gen-ust-nevents-str/gen-ust-nevents-str
 /tests/utils/testapp/gen-ust-nevents/gen-ust-nevents
 /tests/utils/testapp/gen-ust-tracef/gen-ust-tracef
index 466017a9340c97f3529e28528a93bb08f3e5510c..7b9d55b071e39ad77782e5e6fe8167f798d9c257 100644 (file)
@@ -1176,6 +1176,7 @@ AC_CONFIG_FILES([
        tests/utils/tap/Makefile
        tests/utils/testapp/Makefile
        tests/utils/testapp/gen-ust-events/Makefile
+       tests/utils/testapp/gen-ust-events-ns/Makefile
        tests/utils/testapp/gen-syscall-events-callstack/Makefile
        tests/utils/testapp/gen-ust-nevents/Makefile
        tests/utils/testapp/gen-ust-nevents-str/Makefile
index 403cf295a16bed42482cb5d245afa13b43aa8b66..df5ae0943a4b614e69e0a4f661a6e92f9c897fc7 100644 (file)
@@ -54,6 +54,7 @@ TESTS += ust/before-after/test_before_after \
        ust/multi-lib/test_multi_lib \
        ust/rotation-destroy-flush/test_rotation_destroy_flush \
        ust/namespaces/test_ns_contexts \
+       ust/namespaces/test_ns_contexts_change \
        tools/metadata/test_ust
 endif # HAVE_LIBLTTNG_UST_CTL
 
index 11f4d850850e7eb5fa760ccf52172bb314c63330..78f659cc16d200b572a9da4e84e745a5f6e09646 100644 (file)
@@ -1,5 +1,5 @@
-noinst_SCRIPTS = test_ns_contexts
-EXTRA_DIST = test_ns_contexts
+noinst_SCRIPTS = test_ns_contexts test_ns_contexts_change
+EXTRA_DIST = test_ns_contexts test_ns_contexts_change
 
 all-local:
        @if [ x"$(srcdir)" != x"$(builddir)" ]; then \
diff --git a/tests/regression/ust/namespaces/test_ns_contexts_change b/tests/regression/ust/namespaces/test_ns_contexts_change
new file mode 100755 (executable)
index 0000000..18a22e5
--- /dev/null
@@ -0,0 +1,135 @@
+#!/bin/bash
+#
+# Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.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; version 2.1 of the License.
+#
+# 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.,
+# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+
+TEST_DESC="UST - Namespace contexts change"
+
+CURDIR=$(dirname "$0")/
+TESTDIR=$CURDIR/../../..
+
+TESTAPP_PATH="$TESTDIR/utils/testapp"
+TESTAPP_NAME="gen-ust-events-ns"
+TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
+NUM_EVENT=1000
+EVENT_NAME="tp:tptest"
+
+TESTS_PER_NS=16
+
+NUM_TESTS=$((TESTS_PER_NS * 5))
+
+source "$TESTDIR/utils/utils.sh"
+
+# MUST set TESTDIR before calling those functions
+
+function test_ns()
+{
+       local ns=$1
+
+       local session_name="${ns}_ns"
+       local chan_name="${ns}_ns"
+       local context_name="${ns}_ns"
+
+       local trace_path
+       local ns_inode
+       local file_sync_before_last
+       local file_sync_after_unshare
+
+       # Check if the kernel has support for this ns type
+       if [ ! -f "/proc/$$/ns/$ns" ]; then
+               skip 0 "System has no $ns namespace support" $TESTS_PER_NS
+               return
+       fi
+
+       # Get the current ns inode number
+       ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
+       ok $? "Get current $ns namespace inode: $ns_inode" || ns_inode="invalid"
+
+       trace_path=$(mktemp -d)
+       file_sync_before_last=$(mktemp -u)
+       file_sync_after_unshare=$(mktemp -u)
+
+       start_lttng_sessiond
+
+       create_lttng_session_ok "$session_name" "$trace_path"
+       enable_ust_lttng_channel_ok "$session_name" "$chan_name"
+       add_context_ust_ok "$session_name" "$chan_name" "$context_name"
+       enable_ust_lttng_event_ok "$session_name" "$EVENT_NAME" "$chan_name"
+       start_lttng_tracing_ok "$session_name"
+
+       $TESTAPP_BIN -n "$ns" -i $NUM_EVENT -a "$file_sync_after_unshare" -b "$file_sync_before_last" &
+       app_pid=$!
+
+       # Let the app do it's thing before entering the synchronisation loop
+       sleep 0.5
+
+       while [ ! -f "$file_sync_after_unshare" ]; do
+               # Break if the app failed / died
+               if [ ! -f "/proc/$app_pid" ]; then
+                       break
+               fi
+               echo "# Waiting for app..."
+               sleep 0.5
+       done
+
+       app_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
+       ok $? "Get current $ns namespace inode: $app_ns_inode" || app_ns_inode="invalid"
+
+       test "$ns_inode" != "invalid" && test "$app_ns_inode" != "invalid" && test "$ns_inode" != "$app_ns_inode"
+       ok $? "Reported namespace inode changed after unshare"
+
+       touch "$file_sync_before_last"
+
+       # stop and destroy
+       stop_lttng_tracing_ok "$session_name"
+       destroy_lttng_session_ok "$session_name"
+       stop_lttng_sessiond
+
+       # Check that the events contain the right namespace inode number
+       validate_trace_count "${ns}_ns = $ns_inode" "$trace_path" $NUM_EVENT
+       validate_trace_count "${ns}_ns = $app_ns_inode" "$trace_path" $NUM_EVENT
+
+       rm -rf "$trace_path"
+       rm -f "$file_sync_before_last"
+       rm -f "$file_sync_after_unshare"
+}
+
+
+plan_tests $NUM_TESTS
+
+print_test_banner "$TEST_DESC"
+
+isroot=0
+if [ "$(id -u)" == "0" ]; then
+       isroot=1
+fi
+
+skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
+
+system_has_ns=0
+if [ -d "/proc/$$/ns" ]; then
+       system_has_ns=1
+fi
+
+skip $system_has_ns "System has no namespaces support" $NUM_TESTS && exit 0
+
+
+test_ns cgroup
+test_ns ipc
+test_ns mnt
+test_ns net
+#test_ns pid # pid_ns is special, can't be changed that way
+#test_ns user # user_ns can only be change when the app is single threaded, this is always false for an ust instrumented app
+test_ns uts
index e54ac890aee31ffc7a3562ee22add1adf9d27c68..e98f4b5714f414b5561cd3dc2cd308f9b933fdb2 100644 (file)
@@ -1,4 +1,5 @@
 SUBDIRS = gen-ust-events \
+         gen-ust-events-ns \
          gen-ust-nevents \
          gen-ust-nevents-str \
          gen-ust-tracef \
diff --git a/tests/utils/testapp/gen-ust-events-ns/Makefile.am b/tests/utils/testapp/gen-ust-events-ns/Makefile.am
new file mode 100644 (file)
index 0000000..39f9912
--- /dev/null
@@ -0,0 +1,10 @@
+AM_CPPFLAGS += -I$(top_srcdir)/tests/utils -I$(srcdir) \
+              -I$(top_srcdir)/tests/utils/testapp
+
+if HAVE_LIBLTTNG_UST_CTL
+noinst_PROGRAMS = gen-ust-events-ns
+gen_ust_events_ns_SOURCES = gen-ust-events-ns.c tp.c tp.h
+gen_ust_events_ns_LDADD = -llttng-ust -lurcu-bp -llttng-ust-fork \
+               $(top_builddir)/tests/utils/libtestutils.la \
+               $(DL_LIBS) $(POPT_LIBS)
+endif
diff --git a/tests/utils/testapp/gen-ust-events-ns/gen-ust-events-ns.c b/tests/utils/testapp/gen-ust-events-ns/gen-ust-events-ns.c
new file mode 100644 (file)
index 0000000..58a2066
--- /dev/null
@@ -0,0 +1,245 @@
+/*
+ * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.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; version 2.1 of the License.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <popt.h>
+#include <sched.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.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 TRACEPOINT_DEFINE
+#include "tp.h"
+
+#define LTTNG_PROC_NS_PATH_MAX 40
+
+static int nr_iter = 100;
+static int debug = 0;
+static char *ns_opt = NULL;
+static char *after_unshare_file_path = NULL;
+static char *before_second_event_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 },
+       { "iter", 'i', POPT_ARG_INT, &nr_iter, 0, "Number of tracepoint iterations", NULL },
+       { "after", 'a', POPT_ARG_STRING, &after_unshare_file_path, 0, "after_unshare_file_path,", NULL },
+       { "before", 'b', POPT_ARG_STRING, &before_second_event_file_path, 0, "before_second_event_file_path,", 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, i;
+       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);
+
+       for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
+               tracepoint(tp, tptest, ns1);
+               if (should_quit) {
+                       break;
+               }
+       }
+
+       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 we emited the first event group and that the
+        * unshare call is completed.
+        */
+       if (after_unshare_file_path) {
+               ret = create_file(after_unshare_file_path);
+               if (ret != 0) {
+                       goto end;
+               }
+       }
+
+       /* Wait on synchronization before writing second event group. */
+       if (before_second_event_file_path) {
+               ret = wait_on_file(before_second_event_file_path);
+               if (ret != 0) {
+                       goto end;
+               }
+       }
+
+       for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
+               tracepoint(tp, tptest, ns2);
+               if (should_quit) {
+                       break;
+               }
+       }
+
+end:
+       return ret;
+}
+
+/*
+ * Send X events, change NS, wait for file to sync with test script, send X
+ * events in new NS
+ */
+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", 3) == 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, "user", 3) == 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;
+}
diff --git a/tests/utils/testapp/gen-ust-events-ns/tp.c b/tests/utils/testapp/gen-ust-events-ns/tp.c
new file mode 100644 (file)
index 0000000..6f53414
--- /dev/null
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) - 2012 David Goulet <dgoulet@efficios.com>
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED OR
+ * IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program for any purpose,
+ * provided the above notices are retained on all copies.  Permission to modify
+ * the code and to distribute modified code is granted, provided the above
+ * notices are retained, and a notice that the code was modified is included
+ * with the above copyright notice.
+ */
+
+#define _LGPL_SOURCE
+#define TRACEPOINT_CREATE_PROBES
+#include "tp.h"
diff --git a/tests/utils/testapp/gen-ust-events-ns/tp.h b/tests/utils/testapp/gen-ust-events-ns/tp.h
new file mode 100644 (file)
index 0000000..59b3f29
--- /dev/null
@@ -0,0 +1,35 @@
+#undef TRACEPOINT_PROVIDER
+#define TRACEPOINT_PROVIDER tp
+
+#if !defined(_TRACEPOINT_TP_H) || defined(TRACEPOINT_HEADER_MULTI_READ)
+#define _TRACEPOINT_TP_H
+
+/*
+ * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+#include <lttng/tracepoint.h>
+
+TRACEPOINT_EVENT(tp, tptest,
+       TP_ARGS(ino_t, ns_ino),
+       TP_FIELDS(
+               ctf_integer(ino_t, ns_ino, ns_ino)
+       )
+)
+
+#endif /* _TRACEPOINT_TP_H */
+
+#undef TRACEPOINT_INCLUDE_FILE
+#define TRACEPOINT_INCLUDE_FILE ./tp.h
+
+/* This part must be outside ifdef protection */
+#include <lttng/tracepoint-event.h>
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