2 * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
4 * SPDX-License-Identifier: LGPL-2.1-only
18 #include <sys/types.h>
21 #include <common/compat/tid.h>
23 #include "signal-helper.h"
26 #define TRACEPOINT_DEFINE
29 #define LTTNG_PROC_NS_PATH_MAX 40
32 * The runner of this test validates that the kernel supports the
33 * namespace for which it is invoked. However, these defines are added
34 * to allow tests to run on systems that support a given namespace,
35 * but that use a libc that doesn't define its associated clone flag.
38 #define CLONE_NEWNS 0x00020000
40 #ifndef CLONE_NEWCGROUP
41 #define CLONE_NEWCGROUP 0x02000000
44 #define CLONE_NEWUTS 0x04000000
47 #define CLONE_NEWIPC 0x08000000
50 #define CLONE_NEWUSER 0x10000000
53 #define CLONE_NEWPID 0x20000000
56 #define CLONE_NEWNET 0x40000000
59 static int nr_iter
= 100;
61 static char *ns_opt
= NULL
;
62 static char *after_unshare_file_path
= NULL
;
63 static char *before_second_event_file_path
= NULL
;
66 struct poptOption opts
[] = {
67 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
68 { "debug", 'd', POPT_ARG_NONE
, &debug
, 0, "Enable debug output", NULL
},
69 { "ns", 'n', POPT_ARG_STRING
, &ns_opt
, 0, "Namespace short identifier", NULL
},
70 { "iter", 'i', POPT_ARG_INT
, &nr_iter
, 0, "Number of tracepoint iterations", NULL
},
71 { "after", 'a', POPT_ARG_STRING
, &after_unshare_file_path
, 0, "after_unshare_file_path,", NULL
},
72 { "before", 'b', POPT_ARG_STRING
, &before_second_event_file_path
, 0, "before_second_event_file_path,", NULL
},
74 { NULL
, 0, 0, NULL
, 0 }
77 static void debug_printf(const char *format
, ...)
80 va_start(args
, format
);
83 vfprintf(stderr
, format
, args
);
89 static int get_ns_inum(const char *ns
, ino_t
*ns_inum
)
93 char proc_ns_path
[LTTNG_PROC_NS_PATH_MAX
];
96 * /proc/thread-self was introduced in kernel v3.17
98 if (snprintf(proc_ns_path
, LTTNG_PROC_NS_PATH_MAX
,
99 "/proc/thread-self/ns/%s", ns
) >= 0) {
100 if (stat(proc_ns_path
, &sb
) == 0) {
101 *ns_inum
= sb
.st_ino
;
108 if (snprintf(proc_ns_path
, LTTNG_PROC_NS_PATH_MAX
,
109 "/proc/self/task/%d/%s/net", lttng_gettid(), ns
) >= 0) {
110 if (stat(proc_ns_path
, &sb
) == 0) {
111 *ns_inum
= sb
.st_ino
;
121 static int do_the_needful(int ns_flag
, const char *ns_str
)
126 ret
= get_ns_inum(ns_str
, &ns1
);
128 debug_printf("Failed to get ns inode number for namespace %s",
133 debug_printf("Initial %s ns inode number: %lu\n", ns_str
, ns1
);
135 for (i
= 0; nr_iter
< 0 || i
< nr_iter
; i
++) {
136 tracepoint(tp
, tptest
, ns1
);
142 ret
= unshare(ns_flag
);
144 perror("Failed to unshare namespace");
148 ret
= get_ns_inum(ns_str
, &ns2
);
150 debug_printf("Failed to get ns inode number for namespace %s",
155 debug_printf("Post unshare %s ns inode number: %lu\n", ns_str
, ns2
);
158 * Signal that we emited the first event group and that the
159 * unshare call is completed.
161 if (after_unshare_file_path
) {
162 ret
= create_file(after_unshare_file_path
);
168 /* Wait on synchronization before writing second event group. */
169 if (before_second_event_file_path
) {
170 ret
= wait_on_file(before_second_event_file_path
);
176 for (i
= 0; nr_iter
< 0 || i
< nr_iter
; i
++) {
177 tracepoint(tp
, tptest
, ns2
);
188 * Send X events, change NS, wait for file to sync with test script, send X
191 int main(int argc
, const char **argv
)
194 int ret
= EXIT_SUCCESS
;
197 pc
= poptGetContext(NULL
, argc
, argv
, opts
, 0);
198 poptReadDefaultConfig(pc
, 0);
201 poptPrintHelp(pc
, stderr
, 0);
206 while ((opt
= poptGetNextOpt(pc
)) >= 0) {
209 poptPrintUsage(pc
, stderr
, 0);
216 /* An error occurred during option processing. */
217 poptPrintUsage(pc
, stderr
, 0);
218 fprintf(stderr
, "%s: %s\n",
219 poptBadOption(pc
, POPT_BADOPTION_NOALIAS
),
225 if (ns_opt
== NULL
) {
226 poptPrintUsage(pc
, stderr
, 0);
231 if (set_signal_handler()) {
236 if (strncmp(ns_opt
, "cgroup", 3) == 0) {
237 ret
= do_the_needful(CLONE_NEWCGROUP
, "cgroup");
238 } else if (strncmp(ns_opt
, "ipc", 3) == 0) {
239 ret
= do_the_needful(CLONE_NEWIPC
, "ipc");
240 } else if (strncmp(ns_opt
, "mnt", 3) == 0) {
241 ret
= do_the_needful(CLONE_NEWNS
, "mnt");
242 } else if (strncmp(ns_opt
, "net", 3) == 0) {
243 ret
= do_the_needful(CLONE_NEWNET
, "net");
244 } else if (strncmp(ns_opt
, "pid", 3) == 0) {
245 ret
= do_the_needful(CLONE_NEWPID
, "pid");
246 } else if (strncmp(ns_opt
, "user", 3) == 0) {
248 * Will always fail, requires a single threaded application,
249 * which can't happen with UST.
251 ret
= do_the_needful(CLONE_NEWUSER
, "user");
252 } else if (strncmp(ns_opt
, "uts", 3) == 0) {
253 ret
= do_the_needful(CLONE_NEWUTS
, "uts");
255 printf("invalid ns id\n");
259 ret
= ret
? EXIT_FAILURE
: EXIT_SUCCESS
;