124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/*
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* Copyright (C) 2012 Red Hat, Inc.
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*
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Bug in the splice code has caused the file position on the write side
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* of the sendfile system call to be incorrectly set to the read side file
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* position. This can result in the data being written to an incorrect offset.
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*
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* This is a regression test for kernel commit
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* 2cb4b05e7647891b46b91c07c9a60304803d1688
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*/
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#include <sys/sendfile.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "test.h"
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#include "safe_macros.h"
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#define TEST_MSG_IN "world"
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#define TEST_MSG_OUT "hello"
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#define TEST_MSG_ALL (TEST_MSG_OUT TEST_MSG_IN)
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TCID_DEFINE(sendfile08);
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int TST_TOTAL = 1;
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static int in_fd;
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static int out_fd;
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static char *in_file = "sendfile08.in";
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static char *out_file = "sendfile08.out";
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static void cleanup(void);
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static void setup(void);
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int main(int argc, char *argv[])
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{
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int lc;
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int ret;
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char buf[BUFSIZ];
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tst_parse_opts(argc, argv, NULL, NULL);
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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TEST(sendfile(out_fd, in_fd, NULL, strlen(TEST_MSG_IN)));
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if (TEST_RETURN == -1)
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tst_brkm(TBROK | TTERRNO, cleanup, "sendfile() failed");
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ret = SAFE_LSEEK(cleanup, out_fd, 0, SEEK_SET);
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ret = read(out_fd, buf, BUFSIZ);
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if (ret == -1)
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tst_brkm(TBROK | TERRNO, cleanup, "read %s failed",
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out_file);
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if (!strncmp(buf, TEST_MSG_ALL, strlen(TEST_MSG_ALL)))
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tst_resm(TPASS, "sendfile(2) copies data correctly");
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else
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tst_resm(TFAIL, "sendfile(2) copies data incorrectly."
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" Expect \"%s%s\", got \"%s\"", TEST_MSG_OUT,
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TEST_MSG_IN, buf);
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}
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cleanup();
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tst_exit();
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}
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static void setup(void)
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{
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int ret;
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/* Disable test if the version of the kernel is less than 2.6.33 */
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if ((tst_kvercmp(2, 6, 33)) < 0) {
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tst_resm(TCONF, "The out_fd must be socket before kernel");
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tst_brkm(TCONF, NULL, "2.6.33, see kernel commit cc56f7d");
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}
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TEST_PAUSE;
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tst_tmpdir();
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in_fd = SAFE_CREAT(cleanup, in_file, 0700);
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ret = write(in_fd, TEST_MSG_IN, strlen(TEST_MSG_IN));
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if (ret == -1)
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tst_brkm(TBROK | TERRNO, cleanup, "Write %s failed", in_file);
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close(in_fd);
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in_fd = SAFE_OPEN(cleanup, in_file, O_RDONLY);
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out_fd = SAFE_OPEN(cleanup, out_file, O_TRUNC | O_CREAT | O_RDWR, 0777);
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ret = write(out_fd, TEST_MSG_OUT, strlen(TEST_MSG_OUT));
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if (ret == -1)
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tst_brkm(TBROK | TERRNO, cleanup, "Write %s failed", out_file);
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}
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static void cleanup(void)
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{
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close(out_fd);
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close(in_fd);
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tst_rmdir();
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}
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