1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2001 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * Test Name: msync01 22 * 23 * Test Description: 24 * Verify that, msync() succeeds, when the region to synchronize, is part 25 * of, or all of a mapped region. 26 * 27 * Expected Result: 28 * msync() should succeed with a return value of 0, and succesfully 29 * synchronize the memory region. Data read from mapped region should be 30 * the same as the initialized data. 31 * 32 * Algorithm: 33 * Setup: 34 * Setup signal handling. 35 * Create temporary directory. 36 * Pause for SIGUSR1 if option specified. 37 * 38 * Test: 39 * Loop if the proper options are given. 40 * Execute system call 41 * Check return code, if system call failed (return=-1) 42 * Log the errno and Issue a FAIL message. 43 * Otherwise, 44 * Verify the Functionality of system call 45 * if successful, 46 * Issue Functionality-Pass message. 47 * Otherwise, 48 * Issue Functionality-Fail message. 49 * Cleanup: 50 * Print errno log and/or timing stats if options given 51 * Delete the temporary directory created. 52 * 53 * Usage: <for command-line> 54 * msync01 [-c n] [-f] [-i n] [-I x] [-P x] [-t] 55 * where, -c n : Run n copies concurrently. 56 * -f : Turn off functionality Testing. 57 * -i n : Execute test n times. 58 * -I x : Execute test for x seconds. 59 * -P x : Pause for x seconds between iterations. 60 * -t : Turn on syscall timing. 61 * 62 * HISTORY 63 * 07/2001 Ported by Wayne Boyer 64 * 65 * RESTRICTIONS: 66 * None. 67 */ 68 #include <errno.h> 69 #include <unistd.h> 70 #include <fcntl.h> 71 #include <sys/mman.h> 72 73 #include "test.h" 74 75 #define TEMPFILE "msync_file" 76 #define BUF_SIZE 256 77 78 char *TCID = "msync01"; 79 int TST_TOTAL = 1; 80 81 char *addr; /* addr of memory mapped region */ 82 size_t page_sz; /* system page size */ 83 int fildes; /* file descriptor for tempfile */ 84 char write_buf[BUF_SIZE]; /* buffer to hold data to be written */ 85 86 void setup(); /* Main setup function of test */ 87 void cleanup(); /* cleanup function for the test */ 88 89 int main(int ac, char **av) 90 { 91 int lc; 92 char read_buf[BUF_SIZE]; /* buffer to hold data read from file */ 93 int nread = 0, count, err_flg = 0; 94 95 tst_parse_opts(ac, av, NULL, NULL); 96 97 for (lc = 0; TEST_LOOPING(lc); lc++) { 98 99 tst_count = 0; 100 101 setup(); 102 103 TEST(msync(addr, page_sz, MS_ASYNC)); 104 105 if (TEST_RETURN == -1) { 106 tst_resm(TFAIL | TERRNO, "msync failed"); 107 continue; 108 } 109 110 if (lseek(fildes, (off_t) 100, SEEK_SET) != 100) 111 tst_brkm(TBROK | TERRNO, cleanup, 112 "lseek failed"); 113 114 /* 115 * Seeking to specified offset. successful. 116 * Now, read the data (256 bytes) and compare 117 * them with the expected. 118 */ 119 nread = read(fildes, read_buf, sizeof(read_buf)); 120 if (nread != BUF_SIZE) 121 tst_brkm(TBROK, cleanup, "read failed"); 122 else { 123 /* 124 * Check whether read data (from mapped 125 * file) contains the expected data 126 * which was initialised in the setup. 127 */ 128 for (count = 0; count < nread; count++) 129 if (read_buf[count] != 1) 130 err_flg++; 131 } 132 133 if (err_flg != 0) 134 tst_resm(TFAIL, 135 "data read from file doesn't match"); 136 else 137 tst_resm(TPASS, 138 "Functionality of msync() successful"); 139 140 cleanup(); 141 142 } 143 tst_exit(); 144 } 145 146 /* 147 * setup() - performs all ONE TIME setup for this test. 148 * 149 * Get system page size, 150 * Creat a temporary directory and a file under it used for mapping. 151 * Write 1 page size char data into file. 152 * Initialize paged region (256 bytes) from the specified offset pos. 153 */ 154 void setup(void) 155 { 156 int c_total = 0, nwrite = 0; /* no. of bytes to be written */ 157 158 tst_sig(NOFORK, DEF_HANDLER, cleanup); 159 160 TEST_PAUSE; 161 162 if ((page_sz = getpagesize()) == -1) 163 tst_brkm(TBROK | TERRNO, NULL, "getpagesize failed"); 164 165 tst_tmpdir(); 166 167 if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) 168 tst_brkm(TBROK | TERRNO, cleanup, "open failed"); 169 170 while (c_total < page_sz) { 171 nwrite = write(fildes, write_buf, sizeof(write_buf)); 172 if (nwrite <= 0) 173 tst_brkm(TBROK | TERRNO, cleanup, "write failed"); 174 else 175 c_total += nwrite; 176 } 177 178 /* 179 * Call mmap to map virtual memory (mul. of page size bytes) from the 180 * beginning of temporary file (offset is 0) into memory. 181 */ 182 addr = mmap(0, page_sz, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, 183 fildes, 0); 184 185 /* Check for the return value of mmap() */ 186 if (addr == MAP_FAILED) 187 tst_brkm(TBROK | TERRNO, cleanup, "mmap failed"); 188 189 /* Set 256 bytes, at 100 byte offset in the mapped region */ 190 memset(addr + 100, 1, 256); 191 } 192 193 void cleanup(void) 194 { 195 if (munmap(addr, page_sz) == -1) 196 tst_resm(TBROK | TERRNO, "munmap failed"); 197 198 if (close(fildes) == -1) 199 tst_resm(TWARN | TERRNO, "close failed"); 200 201 tst_rmdir(); 202 } 203
