| /****************************************************************************** |
| * |
| * Copyright (c) International Business Machines Corp., 2006 |
| * Author Yi Yang <yyangcdl@cn.ibm.com> |
| * Copyright (c) 2014 Cyril Hrubis <chrubis@suse.cz> |
| * |
| * 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 |
| * |
| * DESCRIPTION |
| * This test case will verify basic function of vmsplice |
| * added by kernel 2.6.17 or up. |
| * |
| *****************************************************************************/ |
| |
| #define _GNU_SOURCE |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <sys/poll.h> |
| |
| #include "test.h" |
| #include "linux_syscall_numbers.h" |
| #include "safe_macros.h" |
| #include "lapi/fcntl.h" |
| #include "lapi/splice.h" |
| #include "lapi/vmsplice.h" |
| |
| #define TEST_BLOCK_SIZE (1<<17) /* 128K */ |
| |
| static void vmsplice_test(void); |
| static void setup(void); |
| static void cleanup(void); |
| |
| #define TESTFILE "vmsplice_test_file" |
| |
| static int fd_out; |
| static char buffer[TEST_BLOCK_SIZE]; |
| |
| char *TCID = "vmsplice01"; |
| int TST_TOTAL = 1; |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) |
| vmsplice_test(); |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void check_file(void) |
| { |
| int i; |
| char vmsplicebuffer[TEST_BLOCK_SIZE]; |
| |
| fd_out = SAFE_OPEN(cleanup, TESTFILE, O_RDONLY); |
| SAFE_READ(cleanup, 1, fd_out, vmsplicebuffer, TEST_BLOCK_SIZE); |
| |
| for (i = 0; i < TEST_BLOCK_SIZE; i++) { |
| if (buffer[i] != vmsplicebuffer[i]) |
| break; |
| } |
| |
| if (i < TEST_BLOCK_SIZE) |
| tst_resm(TFAIL, "Wrong data read from the buffer at %i", i); |
| else |
| tst_resm(TPASS, "Written data has been read back correctly"); |
| |
| close(fd_out); |
| fd_out = 0; |
| } |
| |
| static void vmsplice_test(void) |
| { |
| int pipes[2]; |
| long written; |
| int ret; |
| int fd_out; |
| struct iovec v; |
| loff_t offset; |
| |
| v.iov_base = buffer; |
| v.iov_len = TEST_BLOCK_SIZE; |
| |
| SAFE_PIPE(cleanup, pipes); |
| fd_out = SAFE_OPEN(cleanup, TESTFILE, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| |
| struct pollfd pfd = {.fd = pipes[1], .events = POLLOUT}; |
| offset = 0; |
| |
| while (v.iov_len) { |
| /* |
| * in a real app you'd be more clever with poll of course, |
| * here we are basically just blocking on output room and |
| * not using the free time for anything interesting. |
| */ |
| if (poll(&pfd, 1, -1) < 0) |
| tst_brkm(TBROK | TERRNO, cleanup, "poll() failed"); |
| |
| written = vmsplice(pipes[1], &v, 1, 0); |
| if (written < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, "vmsplice() failed"); |
| } else { |
| if (written == 0) { |
| break; |
| } else { |
| v.iov_base += written; |
| v.iov_len -= written; |
| } |
| } |
| |
| ret = splice(pipes[0], NULL, fd_out, &offset, written, 0); |
| if (ret < 0) |
| tst_brkm(TBROK | TERRNO, cleanup, "splice() failed"); |
| //printf("offset = %lld\n", (long long)offset); |
| } |
| |
| close(pipes[0]); |
| close(pipes[1]); |
| close(fd_out); |
| fd_out = 0; |
| |
| check_file(); |
| } |
| |
| static void setup(void) |
| { |
| int i; |
| |
| if ((tst_kvercmp(2, 6, 17)) < 0) { |
| tst_brkm(TCONF, NULL, |
| "The vmsplice is supported 2.6.17 and newer"); |
| } |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| tst_tmpdir(); |
| |
| if (tst_fs_type(cleanup, ".") == TST_NFS_MAGIC) { |
| tst_brkm(TCONF, cleanup, "Cannot do splice() " |
| "on a file located on an NFS filesystem"); |
| } |
| |
| for (i = 0; i < TEST_BLOCK_SIZE; i++) |
| buffer[i] = i & 0xff; |
| |
| TEST_PAUSE; |
| } |
| |
| static void cleanup(void) |
| { |
| if (fd_out > 0 && close(fd_out)) |
| tst_resm(TWARN, "Failed to close fd_out"); |
| |
| tst_rmdir(); |
| } |