1 /* 2 * Copyright (C) 2012 Red Hat, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 /* 20 * Bug in the splice code has caused the file position on the write side 21 * of the sendfile system call to be incorrectly set to the read side file 22 * position. This can result in the data being written to an incorrect offset. 23 * 24 * This is a regression test for kernel commit 25 * 2cb4b05e7647891b46b91c07c9a60304803d1688 26 */ 27 28 #include <sys/sendfile.h> 29 #include <sys/stat.h> 30 #include <sys/types.h> 31 #include <errno.h> 32 #include <fcntl.h> 33 #include <stdio.h> 34 #include <string.h> 35 #include <unistd.h> 36 #include "test.h" 37 38 #define TEST_MSG_IN "world" 39 #define TEST_MSG_OUT "hello" 40 #define TEST_MSG_ALL (TEST_MSG_OUT TEST_MSG_IN) 41 42 TCID_DEFINE(sendfile08); 43 int TST_TOTAL = 1; 44 45 static int in_fd; 46 static int out_fd; 47 static char *in_file = "sendfile08.in"; 48 static char *out_file = "sendfile08.out"; 49 50 static void cleanup(void); 51 static void setup(void); 52 53 int main(int argc, char *argv[]) 54 { 55 int lc; 56 int ret; 57 char buf[BUFSIZ]; 58 59 tst_parse_opts(argc, argv, NULL, NULL); 60 61 setup(); 62 63 for (lc = 0; TEST_LOOPING(lc); lc++) { 64 TEST(sendfile(out_fd, in_fd, NULL, strlen(TEST_MSG_IN))); 65 66 if (TEST_RETURN == -1) 67 tst_brkm(TBROK | TTERRNO, cleanup, "sendfile() failed"); 68 69 ret = lseek(out_fd, 0, SEEK_SET); 70 if (ret == -1) 71 tst_brkm(TBROK | TERRNO, cleanup, "lseek %s failed", 72 out_file); 73 ret = read(out_fd, buf, BUFSIZ); 74 if (ret == -1) 75 tst_brkm(TBROK | TERRNO, cleanup, "read %s failed", 76 out_file); 77 78 if (!strncmp(buf, TEST_MSG_ALL, strlen(TEST_MSG_ALL))) 79 tst_resm(TPASS, "sendfile(2) copies data correctly"); 80 else 81 tst_resm(TFAIL, "sendfile(2) copies data incorrectly." 82 " Expect \"%s%s\", got \"%s\"", TEST_MSG_OUT, 83 TEST_MSG_IN, buf); 84 } 85 86 cleanup(); 87 tst_exit(); 88 } 89 90 static void setup(void) 91 { 92 int ret; 93 94 /* Disable test if the version of the kernel is less than 2.6.33 */ 95 if ((tst_kvercmp(2, 6, 33)) < 0) { 96 tst_resm(TCONF, "The out_fd must be socket before kernel"); 97 tst_brkm(TCONF, NULL, "2.6.33, see kernel commit cc56f7d"); 98 } 99 100 TEST_PAUSE; 101 102 tst_tmpdir(); 103 104 in_fd = creat(in_file, 0700); 105 if (in_fd == -1) 106 tst_brkm(TBROK | TERRNO, cleanup, "Create %s failed", in_file); 107 108 ret = write(in_fd, TEST_MSG_IN, strlen(TEST_MSG_IN)); 109 if (ret == -1) 110 tst_brkm(TBROK | TERRNO, cleanup, "Write %s failed", in_file); 111 close(in_fd); 112 113 in_fd = open(in_file, O_RDONLY); 114 if (in_fd == -1) 115 tst_brkm(TBROK | TERRNO, cleanup, "Open %s failed", in_file); 116 117 out_fd = open(out_file, O_TRUNC | O_CREAT | O_RDWR, 0777); 118 if (out_fd == -1) 119 tst_brkm(TBROK | TERRNO, cleanup, "Open %s failed", out_file); 120 ret = write(out_fd, TEST_MSG_OUT, strlen(TEST_MSG_OUT)); 121 if (ret == -1) 122 tst_brkm(TBROK | TERRNO, cleanup, "Write %s failed", out_file); 123 } 124 125 static void cleanup(void) 126 { 127 close(out_fd); 128 close(in_fd); 129 130 tst_rmdir(); 131 } 132
