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      1 /*
      2  * Copyright (c) 2015 Fujitsu Ltd.
      3  * Author: Guangwen Feng <fenggw-fnst (at) cn.fujitsu.com>
      4  *
      5  * This program is free software; you can redistribute it and/or modify it
      6  * under the terms of version 2 of the GNU General Public License as
      7  * published by the Free Software Foundation.
      8  *
      9  * This program is distributed in the hope that it would be useful, but
     10  * WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     12  *
     13  * You should have received a copy of the GNU General Public License
     14  * alone with this program.
     15  */
     16 
     17 /*
     18  * DESCRIPTION
     19  *  Basic test for fcntl(2) using F_SETLEASE & F_WRLCK argument.
     20  *  "A write lease may be placed on a file only if there are
     21  *  no other open file descriptors for the file."
     22  */
     23 
     24 #include <errno.h>
     25 
     26 #include "test.h"
     27 #include "safe_macros.h"
     28 
     29 static void setup(void);
     30 static void verify_fcntl(int);
     31 static void cleanup(void);
     32 
     33 #define FILE_MODE	(S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID)
     34 
     35 static int fd1;
     36 static int fd2;
     37 static long type;
     38 
     39 static struct test_case_t {
     40 	int fd1_flag;
     41 	int fd2_flag;
     42 } test_cases[] = {
     43 	{O_RDONLY, O_RDONLY},
     44 	{O_RDONLY, O_WRONLY},
     45 	{O_RDONLY, O_RDWR},
     46 	{O_WRONLY, O_RDONLY},
     47 	{O_WRONLY, O_WRONLY},
     48 	{O_WRONLY, O_RDWR},
     49 	{O_RDWR, O_RDONLY},
     50 	{O_RDWR, O_WRONLY},
     51 	{O_RDWR, O_RDWR},
     52 };
     53 
     54 char *TCID = "fcntl32";
     55 int TST_TOTAL = ARRAY_SIZE(test_cases);
     56 
     57 int main(int ac, char **av)
     58 {
     59 	int lc;
     60 	int tc;
     61 
     62 	tst_parse_opts(ac, av, NULL, NULL);
     63 
     64 	setup();
     65 
     66 	for (lc = 0; TEST_LOOPING(lc); lc++) {
     67 		tst_count = 0;
     68 
     69 		for (tc = 0; tc < TST_TOTAL; tc++)
     70 			verify_fcntl(tc);
     71 	}
     72 
     73 	cleanup();
     74 	tst_exit();
     75 }
     76 
     77 static void setup(void)
     78 {
     79 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
     80 	TEST_PAUSE;
     81 
     82 	tst_tmpdir();
     83 
     84 	switch ((type = tst_fs_type(cleanup, "."))) {
     85 	case TST_NFS_MAGIC:
     86 	case TST_RAMFS_MAGIC:
     87 	case TST_TMPFS_MAGIC:
     88 		tst_brkm(TCONF, cleanup,
     89 			 "Cannot do fcntl(F_SETLEASE, F_WRLCK) "
     90 			 "on %s filesystem",
     91 			 tst_fs_type_name(type));
     92 	default:
     93 		break;
     94 	}
     95 
     96 	SAFE_TOUCH(cleanup, "file", FILE_MODE, NULL);
     97 }
     98 
     99 static void verify_fcntl(int i)
    100 {
    101 	fd1 = SAFE_OPEN(cleanup, "file", test_cases[i].fd1_flag);
    102 	fd2 = SAFE_OPEN(cleanup, "file", test_cases[i].fd2_flag);
    103 
    104 	TEST(fcntl(fd1, F_SETLEASE, F_WRLCK));
    105 
    106 	if (TEST_RETURN == 0) {
    107 		tst_resm(TFAIL, "fcntl(F_SETLEASE, F_WRLCK) "
    108 			 "succeeded unexpectedly");
    109 	} else {
    110 		if (TEST_ERRNO == EBUSY || TEST_ERRNO == EAGAIN) {
    111 			tst_resm(TPASS | TTERRNO,
    112 				 "fcntl(F_SETLEASE, F_WRLCK) "
    113 				 "failed as expected");
    114 		} else {
    115 			tst_resm(TFAIL | TTERRNO,
    116 				 "fcntl(F_SETLEASE, F_WRLCK) "
    117 				 "failed unexpectedly, "
    118 				 "expected errno is EBUSY or EAGAIN");
    119 		}
    120 	}
    121 
    122 	SAFE_CLOSE(cleanup, fd1);
    123 	fd1 = 0;
    124 	SAFE_CLOSE(cleanup, fd2);
    125 	fd2 = 0;
    126 }
    127 
    128 static void cleanup(void)
    129 {
    130 	if (fd1 > 0 && close(fd1))
    131 		tst_resm(TWARN | TERRNO, "Failed to close file");
    132 
    133 	if (fd2 > 0 && close(fd2))
    134 		tst_resm(TWARN | TERRNO, "Failed to close file");
    135 
    136 	tst_rmdir();
    137 }
    138