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101 lines
2.1 KiB
101 lines
2.1 KiB
/* |
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* Copyright (c) Huawei Technologies Co., Ltd., 2015 |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
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* the GNU General Public License for more details. |
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*/ |
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/* |
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* Verify that: |
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* The kernel imposes a limit of 32 nested levels of pid namespaces. |
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*/ |
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#define _GNU_SOURCE |
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#include <sys/wait.h> |
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#include <assert.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <errno.h> |
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#include "pidns_helper.h" |
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#include "test.h" |
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#define MAXNEST 32 |
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char *TCID = "pidns32"; |
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int TST_TOTAL = 1; |
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static void setup(void) |
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{ |
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tst_require_root(); |
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check_newpid(); |
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tst_tmpdir(); |
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} |
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static void cleanup(void) |
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{ |
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tst_rmdir(); |
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} |
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static int child_fn1(void *arg) |
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{ |
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pid_t cpid1; |
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long level = (long)arg; |
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int status; |
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if (level == MAXNEST) |
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return 0; |
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cpid1 = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, |
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(void *)child_fn1, (void *)(level + 1)); |
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if (cpid1 < 0) { |
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printf("level %ld:unexpected error: (%d) %s\n", |
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level, errno, strerror(errno)); |
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return 1; |
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} |
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if (waitpid(cpid1, &status, 0) == -1) |
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return 1; |
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if (WIFEXITED(status) && WEXITSTATUS(status) != 0) { |
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printf("child exited abnormally\n"); |
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return 1; |
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} else if (WIFSIGNALED(status)) { |
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printf("child was killed with signal = %d", WTERMSIG(status)); |
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return 1; |
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} |
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return 0; |
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} |
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static void test_max_nest(void) |
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{ |
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pid_t cpid1; |
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cpid1 = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, |
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(void *)child_fn1, (void *)1); |
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if (cpid1 < 0) |
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tst_brkm(TBROK | TERRNO, cleanup, "clone failed"); |
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tst_record_childstatus(cleanup, cpid1); |
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} |
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int main(int argc, char *argv[]) |
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{ |
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int lc; |
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setup(); |
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tst_parse_opts(argc, argv, NULL, NULL); |
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for (lc = 0; TEST_LOOPING(lc); lc++) { |
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tst_count = 0; |
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test_max_nest(); |
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} |
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cleanup(); |
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tst_exit(); |
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}
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