| /* |
| * Copyright (c) 2013 FNST, DAN LI <li.dan@cn.fujitsu.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Description: |
| * Verify MAP_POPULATE works fine. |
| * "For a file mapping, this causes read-ahead on the file. |
| * Later accesses to the mapping will not be blocked by page faults" |
| * |
| * Expected Result: |
| * mmap() with MAP_POPULATE should succeed returning the address of the |
| * mapped region and this file has been read into RAM, so pages should |
| * be present. |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <stdint.h> |
| #include <sys/stat.h> |
| #include <sys/mman.h> |
| #include <sys/shm.h> |
| |
| #include "test.h" |
| #include "usctest.h" |
| |
| #define TEMPFILE "mmapfile" |
| #define PATHLEN 256 |
| #define MMAPSIZE (1UL<<20) |
| |
| char *TCID = "mmap12"; |
| int TST_TOTAL = 1; |
| |
| static int fildes; |
| static char *addr; |
| |
| static int page_check(void); |
| static void setup(void); |
| static void cleanup(void); |
| |
| int main(int argc, char *argv[]) |
| { |
| int lc; |
| char *msg; |
| |
| msg = parse_opts(argc, argv, NULL, NULL); |
| if (msg != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| |
| addr = mmap(NULL, MMAPSIZE, PROT_READ | PROT_WRITE, |
| MAP_PRIVATE | MAP_POPULATE, fildes, 0); |
| |
| if (addr == MAP_FAILED) { |
| tst_resm(TFAIL | TERRNO, "mmap of %s failed", TEMPFILE); |
| continue; |
| } |
| |
| if (STD_FUNCTIONAL_TEST) { |
| |
| if (page_check()) |
| tst_resm(TFAIL, "Not all pages are present"); |
| else |
| tst_resm(TPASS, "Functionality of mmap() " |
| "successful"); |
| } |
| |
| if (munmap(addr, MMAPSIZE) != 0) |
| tst_brkm(TFAIL | TERRNO, NULL, "munmap failed"); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| |
| } |
| |
| static int page_check(void) |
| { |
| int ret; |
| int i = 1; |
| int flag = 0; |
| int pm; |
| int num_pages; |
| long index; |
| off_t offset; |
| size_t page_sz; |
| uint64_t pagemap; |
| unsigned long vmstart; |
| |
| vmstart = (unsigned long)addr; |
| page_sz = getpagesize(); |
| |
| num_pages = MMAPSIZE / page_sz; |
| index = (vmstart / page_sz) * sizeof(uint64_t); |
| |
| pm = open("/proc/self/pagemap", O_RDONLY); |
| if (pm == -1) |
| tst_brkm(TFAIL | TERRNO, NULL, "Open dev pagemap failed"); |
| |
| offset = lseek(pm, index, SEEK_SET); |
| if (offset != index) |
| tst_brkm(TFAIL | TERRNO, NULL, "Reposition offset failed"); |
| |
| while (i <= num_pages) { |
| ret = read(pm, &pagemap, sizeof(uint64_t)); |
| if (ret < 0) |
| tst_brkm(TFAIL | TERRNO, NULL, "Read pagemap failed"); |
| /* |
| * Check if the page is present. |
| */ |
| if (!(pagemap & (1ULL<<63))) { |
| tst_resm(TINFO, "The %dth page addressed at %lX is not " |
| "present", i, vmstart + i * page_sz); |
| flag = 1; |
| } |
| |
| i++; |
| } |
| |
| close(pm); |
| |
| if (flag) |
| return 1; |
| |
| return 0; |
| } |
| |
| static void setup(void) |
| { |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| if ((tst_kvercmp(2, 6, 25)) < 0) |
| tst_brkm(TCONF, NULL, |
| "This test can only run on kernels that are 2.6.25 and " |
| "higher"); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0766); |
| if (fildes < 0) |
| tst_brkm(TFAIL, cleanup, "opening %s failed", TEMPFILE); |
| |
| if (ftruncate(fildes, MMAPSIZE) < 0) |
| tst_brkm(TFAIL | TERRNO, cleanup, "ftruncate file failed"); |
| |
| } |
| |
| static void cleanup(void) |
| { |
| close(fildes); |
| TEST_CLEANUP; |
| tst_rmdir(); |
| } |