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      1 /*
      2  * Copyright (C) 2012 Linux Test Project, Inc.
      3  *
      4  * This program is free software; you can redistribute it and/or
      5  * modify it under the terms of version 2 of the GNU General Public
      6  * License as published by the Free Software Foundation.
      7  *
      8  * This program is distributed in the hope that it would be useful,
      9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     11  *
     12  * Further, this software is distributed without any warranty that it
     13  * is free of the rightful claim of any third person regarding
     14  * infringement or the like.  Any license provided herein, whether
     15  * implied or otherwise, applies only to this software file.  Patent
     16  * licenses, if any, provided herein do not apply to combinations of
     17  * this program with other software, or any other product whatsoever.
     18  *
     19  * You should have received a copy of the GNU General Public License
     20  * along with this program; if not, write the Free Software
     21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
     22  * 02110-1301, USA.
     23  */
     24 
     25 /*
     26  * errno tests for readahead() syscall
     27  */
     28 #define _GNU_SOURCE
     29 #include <errno.h>
     30 #include <fcntl.h>
     31 #include <stdio.h>
     32 #include <stdlib.h>
     33 #include <unistd.h>
     34 #include <sys/socket.h>
     35 #include <sys/stat.h>
     36 #include <sys/syscall.h>
     37 #include <sys/types.h>
     38 #include "config.h"
     39 #include "test.h"
     40 #include "safe_macros.h"
     41 #include "lapi/syscalls.h"
     42 
     43 char *TCID = "readahead01";
     44 int TST_TOTAL = 1;
     45 
     46 option_t options[] = {
     47 	{NULL, NULL, NULL}
     48 };
     49 
     50 #if defined(__NR_readahead)
     51 static void setup(void);
     52 static void cleanup(void);
     53 
     54 static int check_ret(long expected_ret)
     55 {
     56 	if (expected_ret == TEST_RETURN) {
     57 		tst_resm(TPASS, "expected ret success - "
     58 			 "returned value = %ld", TEST_RETURN);
     59 		return 0;
     60 	}
     61 	tst_resm(TFAIL, "unexpected failure - "
     62 		 "returned value = %ld, expected: %ld",
     63 		 TEST_RETURN, expected_ret);
     64 	return 1;
     65 }
     66 
     67 static int check_errno(long expected_errno)
     68 {
     69 	if (TEST_ERRNO == expected_errno) {
     70 		tst_resm(TPASS | TTERRNO, "expected failure");
     71 		return 0;
     72 	}
     73 
     74 	if (TEST_ERRNO == 0)
     75 		tst_resm(TFAIL, "call succeeded unexpectedly");
     76 	else
     77 		tst_resm(TFAIL | TTERRNO, "unexpected failure - "
     78 			 "expected = %ld : %s, actual",
     79 			 expected_errno, strerror(expected_errno));
     80 	return 1;
     81 }
     82 
     83 static void test_bad_fd(void)
     84 {
     85 	char tempname[PATH_MAX] = "readahead01_XXXXXX";
     86 	int fd;
     87 
     88 	tst_resm(TINFO, "test_bad_fd -1");
     89 	TEST(readahead(-1, 0, getpagesize()));
     90 	check_ret(-1);
     91 	check_errno(EBADF);
     92 
     93 	tst_resm(TINFO, "test_bad_fd O_WRONLY");
     94 	fd = mkstemp(tempname);
     95 	if (fd == -1)
     96 		tst_resm(TBROK | TERRNO, "mkstemp failed");
     97 	close(fd);
     98 	fd = open(tempname, O_WRONLY);
     99 	if (fd == -1)
    100 		tst_resm(TBROK | TERRNO, "Failed to open testfile");
    101 	TEST(readahead(fd, 0, getpagesize()));
    102 	check_ret(-1);
    103 	check_errno(EBADF);
    104 	close(fd);
    105 	unlink(tempname);
    106 }
    107 
    108 static void test_invalid_fd(void)
    109 {
    110 	int fd[2];
    111 
    112 	tst_resm(TINFO, "test_invalid_fd pipe");
    113 	if (pipe(fd) < 0)
    114 		tst_resm(TBROK | TERRNO, "Failed to create pipe");
    115 	TEST(readahead(fd[0], 0, getpagesize()));
    116 	check_ret(-1);
    117 	check_errno(EINVAL);
    118 	close(fd[0]);
    119 	close(fd[1]);
    120 
    121 	tst_resm(TINFO, "test_invalid_fd socket");
    122 	fd[0] = socket(AF_INET, SOCK_STREAM, 0);
    123 	if (fd[0] < 0)
    124 		tst_resm(TBROK | TERRNO, "Failed to create socket");
    125 	TEST(readahead(fd[0], 0, getpagesize()));
    126 	check_ret(-1);
    127 	check_errno(EINVAL);
    128 	close(fd[0]);
    129 }
    130 
    131 int main(int argc, char *argv[])
    132 {
    133 	int lc;
    134 
    135 	tst_parse_opts(argc, argv, options, NULL);
    136 
    137 	setup();
    138 	for (lc = 0; TEST_LOOPING(lc); lc++) {
    139 		tst_count = 0;
    140 		test_bad_fd();
    141 		test_invalid_fd();
    142 	}
    143 	cleanup();
    144 	tst_exit();
    145 }
    146 
    147 static void setup(void)
    148 {
    149 	tst_require_root();
    150 	tst_tmpdir();
    151 
    152 	/* check if readahead syscall is supported */
    153 	ltp_syscall(__NR_readahead, 0, 0, 0);
    154 
    155 	TEST_PAUSE;
    156 }
    157 
    158 static void cleanup(void)
    159 {
    160 	tst_rmdir();
    161 }
    162 
    163 #else /* __NR_readahead */
    164 int main(void)
    165 {
    166 	tst_brkm(TCONF, NULL, "System doesn't support __NR_readahead");
    167 }
    168 #endif
    169