/*
*
* Copyright (c) International Business Machines Corp., 2001
*
* 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
*/
/*
* NAME
* fcntl14.c
*
* DESCRIPTION
* File locking test cases for fcntl. In Linux, S_ENFMT is not implemented
* in the kernel. However all standard Unix kernels define S_ENFMT as
* S_ISGID. So this test defines S_ENFMT as S_ISGID.
*
* ALGORITHM
* Various test cases are used to lock a file opened without mandatory
* locking, with mandatory locking and mandatory locking with NOBLOCK
*
* USAGE
* fcntl14
*
* HISTORY
* 07/2001 Ported by Wayne Boyer
*
* RESTRICTIONS
* None
*/
#define _GNU_SOURCE 1
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#include <errno.h>
#include <sys/wait.h>
#include <inttypes.h>
#include "test.h"
#include "safe_macros.h"
#define SKIP 0x0c00
#if SKIP == F_RDLCK || SKIP== F_WRLCK
#error invalid value for SKIP, must be distinct from F_RDLCK and F_WRLCK
#endif
#ifndef S_ENFMT
#define S_ENFMT S_ISGID
#endif
/* NOBLOCK - immediate success */
#define NOBLOCK 2
/* WILLBLOCK - blocks, then succeeds (parent must unlock records) */
#define WILLBLOCK 3
#define TIME_OUT 60
typedef struct {
short a_type;
short a_whence;
long a_start;
long a_len;
short b_type; /* SKIP means suppress fcntl call */
short b_whence;
long b_start;
long b_len;
short c_type;
int c_whence;
long c_start;
long c_len;
short c_flag;
} testcase;
static testcase testcases[] = {
/* Test cases: entire boundary */
/* #1 Parent making a write lock on entire file */
{F_WRLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock on entire file */
F_RDLCK, 0, 0L, 0L, WILLBLOCK},
/* #2 Parent making a write lock on entire file */
{F_WRLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock on entire file */
F_WRLCK, 0, 0L, 0L, WILLBLOCK},
/* #3 Parent making a read lock on entire file */
{F_RDLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock on entire file */
F_RDLCK, 0, 0L, 0L, NOBLOCK},
/* #4 Parent making a read lock on entire file */
{F_RDLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock on entire file */
F_WRLCK, 0, 0L, 0L, WILLBLOCK},
/* Test case: start boundary */
/* #5 Parent making a write lock on entire file */
{F_WRLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/*
* Child attempting a read lock from beginning of
* file for 5 bytes
*/
F_RDLCK, 0, 0L, 5L, WILLBLOCK},
/* #6 Parent making a write lock on entire file */
{F_WRLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/*
* Child attempting a write lock from beginning of
* file for 5 bytes
*/
F_WRLCK, 0, 0L, 5L, WILLBLOCK},
/* #7 Parent making a read lock on entire file */
{F_RDLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/*
* Child attempting a read lock from beginning of
* file for 5 bytes
*/
F_RDLCK, 0, 0L, 5L, NOBLOCK},
/* #8 Parent making a read lock on entire file */
{F_RDLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/*
* Child attempting a write lock from beginning of
* file for 5 bytes
*/
F_WRLCK, 0, 0L, 5L, WILLBLOCK},
/* Test cases: end boundary */
/* #9 Parent making a write lock on entire file */
{F_WRLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 7 to end of file */
F_RDLCK, 0, 7L, 0L, WILLBLOCK},
/* #10 Parent making a write lock on entire file */
{F_WRLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 7 to end of file */
F_WRLCK, 0, 7L, 0L, WILLBLOCK},
/* #11 Parent making a read lock on entire file */
{F_RDLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 7 to end of file */
F_RDLCK, 0, 7L, 0L, NOBLOCK},
/* #12 Parent making a read lock on entire file */
{F_RDLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 7 to end of file */
F_WRLCK, 0, 7L, 0L, WILLBLOCK},
/* Test cases: entire boundary ( less than entire file) */
/*
* #13 Parent making a write lock from beginning of
* file for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/*
* Child attempting a read lock from beginning of
* file for 5 bytes
*/
F_RDLCK, 0, 0L, 5L, WILLBLOCK},
/*
* #14 Parent making a write lock from beginning of file
* for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/*
* Child attempting a write lock from beginning of
* file for 5 bytes
*/
F_WRLCK, 0, 0L, 5L, WILLBLOCK},
/*
* #15 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/*
* Child attempting a read lock from beginning of
* file for 5 bytes
*/
F_RDLCK, 0, 0L, 5L, NOBLOCK},
/*
* #16 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/*
* Child attempting a write lock from beginning
* of file for 5 bytes
*/
F_WRLCK, 0, 0L, 5L, WILLBLOCK},
/* Test cases: inside boundary */
/*
* #17 Parent making a write lock from beginning
* of file for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 2 to byte 4 */
F_RDLCK, 0, 1L, 3L, WILLBLOCK},
/*
* #18 Parent making a write lock from beginning of
* file for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 2 to byte 4 */
F_WRLCK, 0, 1L, 3L, WILLBLOCK},
/*
* #19 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 2 to byte 4 */
F_RDLCK, 0, 1L, 3L, NOBLOCK},
/*
* #20 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 2 to byte 4 */
F_WRLCK, 0, 1L, 3L, WILLBLOCK},
/* Test cases: cross boundary (inside to after) */
/*
* #21 Parent making a write lock from beginning of
* file for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 3 to byte 7 */
F_RDLCK, 0, 2L, 5L, WILLBLOCK},
/*
* #22 Parent making a write lock from beginning
* of file for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 3 to byte 7 */
F_WRLCK, 0, 2L, 5L, WILLBLOCK},
/*
* #23 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 3 to byte 7 */
F_RDLCK, 0, 2L, 5L, NOBLOCK},
/*
* #24 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 3 to byte 7 */
F_WRLCK, 0, 2L, 5L, WILLBLOCK},
/* Test cases: outside boundary (after) */
/*
* #25 Parent making a write lock from beginning of
* file for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 7 to end of file */
F_RDLCK, 0, 6L, 0L, NOBLOCK},
/*
* #26 Parent making a write lock from beginning of
* file for 5 bytes
*/
{F_WRLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 7 to end of file */
F_WRLCK, 0, 6L, 0L, NOBLOCK},
/*
* #27 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 7 to end of file */
F_RDLCK, 0, 6L, 0L, NOBLOCK},
/*
* #28 Parent making a read lock from beginning of
* file for 5 bytes
*/
{F_RDLCK, 0, 0L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 7 to end of file */
F_WRLCK, 0, 6L, 0L, NOBLOCK},
/* Test cases: outside boundary (before) */
/* #29 Parent making a write lock from byte 3 to byte 7 */
{F_WRLCK, 0, 2L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from beginning of file to byte 2 */
F_RDLCK, 0, 0L, 2L, NOBLOCK},
/* #30 Parent making a write lock from byte 3 to byte 7 */
{F_WRLCK, 0, 2L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from beginning of file to byte 2 */
F_WRLCK, 0, 0L, 2L, NOBLOCK},
/* #31 Parent making a write lock from byte 3 to byte 7 */
{F_RDLCK, 0, 2L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from beginning of file to byte 2 */
F_RDLCK, 0, 0L, 2L, NOBLOCK},
/* #32 Parent making a write lock from byte 3 to byte 7 */
{F_RDLCK, 0, 2L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from beginning of file to byte 2 */
F_WRLCK, 0, 0L, 2L, NOBLOCK},
/* Test cases: cross boundary (before to inside) */
/* #33 Parent making a write lock from byte 5 to end of file */
{F_WRLCK, 0, 4L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 3 to byte 7 */
F_RDLCK, 0, 2L, 5L, WILLBLOCK},
/* #34 Parent making a write lock from byte 5 to end of file */
{F_WRLCK, 0, 4L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 3 to byte 7 */
F_WRLCK, 0, 2L, 5L, WILLBLOCK},
/* #35 Parent making a read lock from byte 5 to end of file */
{F_RDLCK, 0, 4L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a read lock from byte 3 to byte 7 */
F_RDLCK, 0, 2L, 5L, NOBLOCK},
/* #36 Parent making a read lock from byte 5 to end of file */
{F_RDLCK, 0, 4L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting a write lock from byte 3 to byte 7 */
F_WRLCK, 0, 2L, 5L, WILLBLOCK},
/* Start of negative L_start and L_len test cases */
/*
* #37 Parent making write lock from byte 2 to byte 3
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 1 */
F_WRLCK, 0, 1L, 1L, NOBLOCK},
/*
* #38 Parent making write lock from byte 2 to byte 3
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 4 */
F_WRLCK, 0, 4L, 1L, NOBLOCK},
/*
* #39 Parent making write lock from byte 2 to byte 3
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 2 */
F_WRLCK, 0, 2L, 1L, WILLBLOCK},
/*
* #40 Parent making write lock from byte 2 to byte 3
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 3 */
F_WRLCK, 0, 3L, 1L, WILLBLOCK},
/*
* #41 Parent making write lock from byte 2 to byte 6
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 1 */
F_WRLCK, 0, 1L, 1L, NOBLOCK},
/*
* #42 Parent making write lock from byte 2 to byte 6
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 7 */
F_WRLCK, 0, 1L, 1L, NOBLOCK},
/*
* #43 Parent making write lock from byte 2 to byte 6
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 2 */
F_WRLCK, 0, 2L, 1L, WILLBLOCK},
/*
* #44 Parent making write lock from byte 2 to byte 6
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 5 */
F_WRLCK, 0, 5L, 1L, WILLBLOCK},
/*
* #45 Parent making write lock from byte 2 to byte 6
* with L_start = -3
*/
{F_WRLCK, 1, -3L, 5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 6 */
F_WRLCK, 0, 6L, 1L, WILLBLOCK},
/*
* #46 Parent making write lock from byte 2 to byte 3 with
* L_start = -2 and L_len = -2
*/
{F_WRLCK, 1, 2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 1 */
F_WRLCK, 0, 1L, 1L, NOBLOCK},
/*
* #47 Parent making write lock from byte 2 to byte 3 with
* L_start = -2 and L_len = -2
*/
{F_WRLCK, 1, -2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 4 */
F_WRLCK, 0, 4L, 1L, NOBLOCK},
/*
* #48 Parent making write lock from byte 2 to byte 3 with
* L_start = -2 and L_len = -2
*/
{F_WRLCK, 1, -2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 2 */
F_WRLCK, 0, 2L, 1L, WILLBLOCK},
/*
* #49 Parent making write lock from byte 2 to byte 3 with
* L_start = -2 and L_len = -2
*/
{F_WRLCK, 1, -2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 3 */
F_WRLCK, 0, 3L, 1L, WILLBLOCK},
/*
* #50 Parent making write lock from byte 6 to byte 7 with
* L_start = 2 and L_len = -2
*/
{F_WRLCK, 1, 2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 5 */
F_WRLCK, 0, 5L, 1L, NOBLOCK},
/*
* #51 Parent making write lock from byte 6 to byte 7 with
* L_start = 2 and L_len = -2
*/
{F_WRLCK, 1, 2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 8 */
F_WRLCK, 0, 8L, 1L, NOBLOCK},
/*
* #52 Parent making write lock from byte 6 to byte 7 with
* L_start = 2 and L_len = -2
*/
{F_WRLCK, 1, 2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 6 */
F_WRLCK, 0, 6L, 1L, WILLBLOCK},
/*
* #53 Parent making write lock from byte 6 to byte 7 with
* L_start = 2 and L_len = -2
*/
{F_WRLCK, 1, 2L, -2L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 7 */
F_WRLCK, 0, 7L, 1L, WILLBLOCK},
/*
* #54 Parent making write lock from byte 3 to byte 7 with
* L_start = 2 and L_len = -5
*/
{F_WRLCK, 1, 2L, -5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 2 */
F_WRLCK, 0, 2L, 1L, NOBLOCK},
/*
* #55 Parent making write lock from byte 3 to byte 7 with
* L_start = 2 and L_len = -5
*/
{F_WRLCK, 1, 2L, -5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 8 */
F_WRLCK, 0, 8L, 1L, NOBLOCK},
/*
* #56 Parent making write lock from byte 3 to byte 7 with
* L_start = 2 and L_len = -5
*/
{F_WRLCK, 1, 2L, -5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 3 */
F_WRLCK, 0, 3L, 1L, WILLBLOCK},
/*
* #57 Parent making write lock from byte 3 to byte 7 with
* L_start = 2 and L_len = -5
*/
{F_WRLCK, 1, 2L, -5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 5 */
F_WRLCK, 0, 5L, 1L, WILLBLOCK},
/*
* #58 Parent making write lock from byte 3 to byte 7 with
* L_start = 2 and L_len = -5
*/
{F_WRLCK, 1, 2L, -5L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 7 */
F_WRLCK, 0, 7L, 1L, WILLBLOCK},
/* Test case for block 4 */
/* #59 Parent making write lock on entire file */
{F_WRLCK, 0, 0L, 0L, SKIP, 0, 0L, 0L,
/* Child attempting write lock on byte 15 to end of file */
F_WRLCK, 0, 15L, 0L, WILLBLOCK},
};
static testcase *thiscase;
static struct flock flock;
static int parent, child, status, fail = 0;
static int got1 = 0;
static int fd;
static int test;
static char tmpname[40];
#define FILEDATA "ten bytes!"
void catch1(int sig);
void catch_alarm(int sig);
char *TCID = "fcntl14";
int TST_TOTAL = 1;
int NO_NFS = 1;
#ifdef UCLINUX
static char *argv0;
#endif
void cleanup(void)
{
tst_rmdir();
}
void setup(void)
{
struct sigaction act;
tst_sig(FORK, DEF_HANDLER, cleanup);
signal(SIGHUP, SIG_IGN);
umask(0);
TEST_PAUSE;
tst_tmpdir();
parent = getpid();
sprintf(tmpname, "fcntl2.%d", parent);
/* setup signal handler for signal from child */
memset(&act, 0, sizeof(act));
act.sa_handler = catch1;
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask, SIGUSR1);
if ((sigaction(SIGUSR1, &act, NULL)) < 0) {
tst_resm(TFAIL, "SIGUSR1 signal setup failed, errno = %d",
errno);
cleanup();
}
memset(&act, 0, sizeof(act));
act.sa_handler = catch_alarm;
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask, SIGALRM);
if ((sigaction(SIGALRM, &act, NULL)) < 0) {
tst_resm(TFAIL, "SIGALRM signal setup failed");
cleanup();
}
}
void wake_parent(void)
{
if ((kill(parent, SIGUSR1)) < 0) {
tst_resm(TFAIL, "Attempt to send signal to parent " "failed");
tst_resm(TFAIL, "Test case %d, errno = %d", test + 1, errno);
fail = 1;
}
}
void do_usleep_child(void)
{
usleep(100000); /* XXX how long is long enough? */
wake_parent();
exit(0);
}
void dochild(void)
{
int rc;
pid_t pid;
flock.l_type = thiscase->c_type;
flock.l_whence = thiscase->c_whence;
flock.l_start = thiscase->c_start;
flock.l_len = thiscase->c_len;
flock.l_pid = 0;
fail = 0;
/*
* Check to see if child lock will succeed. If it will, FLOCK
* structure will return with l_type changed to F_UNLCK. If it will
* not, the parent pid will be returned in l_pid and the type of
* lock that will block it in l_type.
*/
if ((rc = fcntl(fd, F_GETLK, &flock)) < 0) {
tst_resm(TFAIL, "Attempt to check lock status failed");
tst_resm(TFAIL, "Test case %d, errno = %d", test + 1, errno);
fail = 1;
} else {
if ((thiscase->c_flag) == NOBLOCK) {
if (flock.l_type != F_UNLCK) {
tst_resm(TFAIL,
"Test case %d, GETLK: type = %d, "
"%d was expected", test + 1,
flock.l_type, F_UNLCK);
fail = 1;
}
if (flock.l_whence != thiscase->c_whence) {
tst_resm(TFAIL,
"Test case %d, GETLK: whence = %d, "
"should have remained %d", test + 1,
flock.l_whence, thiscase->c_whence);
fail = 1;
}
if (flock.l_start != thiscase->c_start) {
tst_resm(TFAIL,
"Test case %d, GETLK: start = %" PRId64
", " "should have remained %" PRId64,
test + 1, (int64_t) flock.l_start,
(int64_t) thiscase->c_start);
fail = 1;
}
if (flock.l_len != thiscase->c_len) {
tst_resm(TFAIL,
"Test case %d, GETLK: len = %" PRId64
", " "should have remained %" PRId64,
test + 1, (int64_t) flock.l_len,
(int64_t) thiscase->c_len);
fail = 1;
}
if (flock.l_pid != 0) {
tst_resm(TFAIL,
"Test case %d, GETLK: pid = %d, "
"should have remained 0", test + 1,
flock.l_pid);
fail = 1;
}
} else {
if (flock.l_pid != parent) {
tst_resm(TFAIL,
"Test case %d, GETLK: pid = %d, "
"should be parent's id of %d",
test + 1, flock.l_pid, parent);
fail = 1;
}
if (flock.l_type != thiscase->a_type) {
tst_resm(TFAIL,
"Test case %d, GETLK: type = %d, "
"should be parent's first lock type of %d",
test + 1, flock.l_type,
thiscase->a_type);
fail = 1;
}
}
}
/*
* now try to set the lock, nonblocking
* This will succeed for NOBLOCK,
* fail for WILLBLOCK
*/
flock.l_type = thiscase->c_type;
flock.l_whence = thiscase->c_whence;
flock.l_start = thiscase->c_start;
flock.l_len = thiscase->c_len;
flock.l_pid = 0;
if ((rc = fcntl(fd, F_SETLK, &flock)) < 0) {
if ((thiscase->c_flag) == NOBLOCK) {
tst_resm(TFAIL, "Attempt to set child NONBLOCKING "
"lock failed");
tst_resm(TFAIL, "Test case %d, errno = %d",
test + 1, errno);
fail = 1;
}
}
if ((thiscase->c_flag) == WILLBLOCK) {
if (rc != -1 || (errno != EACCES && errno != EAGAIN)) {
tst_resm(TFAIL,
"SETLK: rc = %d, errno = %d, -1/EAGAIN or EACCES "
"was expected", rc, errno);
fail = 1;
}
if (rc == 0) {
/* accidentally got the lock */
/* XXX how to clean up? */
(void)fcntl(fd, F_UNLCK, &flock);
}
/*
* Lock should succeed after blocking and parent releases
* lock, tell the parent to release the locks.
* Do the lock in this process, send the signal in a child
* process, so that the SETLKW actually uses the blocking
* mechanism in the kernel.
*
* XXX inherent race: we want to wait until the
* F_SETLKW has started, but we don't have a way to
* check that reliably in the child. (We'd
* need some way to have fcntl() atomically unblock a
* signal and wait for the lock.)
*/
pid = FORK_OR_VFORK();
switch (pid) {
case -1:
tst_resm(TFAIL, "Fork failed");
fail = 1;
break;
case 0:
#ifdef UCLINUX
if (self_exec(argv0, "nd", 1, parent) < 0) {
tst_resm(TFAIL, "self_exec failed");
break;
}
#else
do_usleep_child();
#endif
break;
default:
if ((rc = fcntl(fd, F_SETLKW, &flock)) < 0) {
tst_resm(TFAIL, "Attempt to set child BLOCKING "
"lock failed");
tst_resm(TFAIL, "Test case %d, errno = %d",
test + 1, errno);
fail = 1;
}
waitpid(pid, &status, 0);
break;
}
}
if (fail) {
exit(1);
} else {
exit(0);
}
}
void run_test(int file_flag, int file_mode, int seek, int start, int end)
{
fail = 0;
for (test = start; test < end; test++) {
fd = SAFE_OPEN(cleanup, tmpname, file_flag, file_mode);
if (write(fd, FILEDATA, 10) < 0)
tst_brkm(TBROK, cleanup, "write() failed");
if (seek) {
SAFE_LSEEK(cleanup, fd, seek, 0);
}
thiscase = &testcases[test];
flock.l_type = thiscase->a_type;
flock.l_whence = thiscase->a_whence;
flock.l_start = thiscase->a_start;
flock.l_len = thiscase->a_len;
/* set the initial parent lock on the file */
if ((fcntl(fd, F_SETLK, &flock)) < 0) {
tst_resm(TFAIL, "First parent lock failed");
tst_resm(TFAIL, "Test case %d, errno = %d",
test + 1, errno);
fail = 1;
}
if ((thiscase->b_type) != SKIP) {
flock.l_type = thiscase->b_type;
flock.l_whence = thiscase->b_whence;
flock.l_start = thiscase->b_start;
flock.l_len = thiscase->b_len;
/* set the second parent lock */
if ((fcntl(fd, F_SETLK, &flock)) < 0) {
tst_resm(TFAIL, "Second parent lock failed");
tst_resm(TFAIL, "Test case %d, errno = %d",
test + 1, errno);
fail = 1;
}
}
if ((thiscase->c_type) == SKIP) {
close(fd);
tst_resm(TINFO, "skipping test %d", test + 1);
continue;
}
/* Mask SIG_USR1 before forking child, to avoid race */
(void)sighold(SIGUSR1);
/* flush the stdout to avoid garbled output */
fflush(stdout);
if ((child = FORK_OR_VFORK()) == 0) {
#ifdef UCLINUX
if (self_exec(argv0, "nddddddddd", 2, thiscase->c_type,
thiscase->c_whence, thiscase->c_start,
thiscase->c_len, thiscase->c_flag,
thiscase->a_type, fd, test, parent) < 0) {
tst_resm(TFAIL, "self_exec failed");
cleanup();
}
#else
dochild();
#endif
}
if (child < 0)
tst_brkm(TBROK|TERRNO, cleanup, "Fork failed");
if ((thiscase->c_flag) == WILLBLOCK) {
/*
* Wait for a signal from the child then remove
* blocking lock. Set a 60 second alarm to break the
* pause just in case the child never signals us.
*/
alarm(TIME_OUT);
sigpause(SIGUSR1);
/* turn off the alarm timer */
alarm((unsigned)0);
if (got1 != 1)
tst_resm(TINFO, "Pause terminated without "
"signal SIGUSR1 from child");
got1 = 0;
/*
* setup lock structure for parent to delete
* blocking lock then wait for child to exit
*/
flock.l_type = F_UNLCK;
flock.l_whence = 0;
flock.l_start = 0L;
flock.l_len = 0L;
if ((fcntl(fd, F_SETLK, &flock)) < 0) {
tst_resm(TFAIL, "Attempt to release parent "
"lock failed");
tst_resm(TFAIL, "Test case %d, errno = %d",
test + 1, errno);
fail = 1;
}
}
/*
* set a 60 second alarm to break the wait just in case the
* child doesn't terminate on its own accord
*/
alarm(TIME_OUT);
/* wait for the child to terminate and close the file */
waitpid(child, &status, 0);
/* turn off the alarm clock */
alarm((unsigned)0);
if (status != 0) {
tst_resm(TFAIL, "tchild returned status 0x%x", status);
fail = 1;
}
close(fd);
if (fail)
tst_resm(TFAIL, "testcase:%d FAILED", test + 1);
else
tst_resm(TPASS, "testcase:%d PASSED", test + 1);
}
unlink(tmpname);
}
void catch_alarm(int sig)
{
/*
* Timer has runout and child has not signaled, need
* to kill off the child as it appears it will not
* on its own accord. Check that it is still around
* as it may have terminated abnormally while parent
* was waiting for SIGUSR1 signal from it.
*/
if (kill(child, 0) == 0) {
kill(child, SIGKILL);
perror("The child didnot terminate on its own accord");
}
}
void catch1(int sig)
{
struct sigaction act;
/*
* Set flag to let parent know that child is ready to have lock
* removed
*/
memset(&act, 0, sizeof(act));
act.sa_handler = catch1;
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask, SIGUSR1);
sigaction(SIGUSR1, &act, NULL);
got1++;
}
static void testcheck_end(int check_fail, char *msg)
{
if (check_fail)
tst_resm(TFAIL, "%s FAILED", msg);
else
tst_resm(TPASS, "%s PASSED", msg);
}
int main(int ac, char **av)
{
int lc;
tst_parse_opts(ac, av, NULL, NULL);
#ifdef UCLINUX
argv0 = av[0];
maybe_run_child(&do_usleep_child, "nd", 1, &parent);
thiscase = malloc(sizeof(testcase));
maybe_run_child(&dochild, "nddddddddd", 2, &thiscase->c_type,
&thiscase->c_whence, &thiscase->c_start,
&thiscase->c_len, &thiscase->c_flag, &thiscase->a_type,
&fd, &test, &parent);
#endif
setup();
if (tst_fs_type(cleanup, ".") == TST_NFS_MAGIC)
NO_NFS = 0;
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
/* //block1: */
tst_resm(TINFO, "Enter block 1: without mandatory locking");
fail = 0;
/*
* try various file locks on an ordinary file without
* mandatory locking
*/
(void)run_test(O_CREAT | O_RDWR | O_TRUNC, 0777, 0, 0, 36);
testcheck_end(fail, "Block 1, test 1");
/* Now try with negative values for L_start and L_len */
(void)run_test(O_CREAT | O_RDWR | O_TRUNC, 0777, 5, 36, 45);
testcheck_end(fail, "Block 1, test 2");
tst_resm(TINFO, "Exit block 1");
/* //block2: */
/*
* Skip block2 if test on NFS, since NFS does not support
* mandatory locking
*/
tst_resm(TINFO, "Enter block 2: with mandatory locking");
if (NO_NFS) {
fail = 0;
/*
* Try various locks on a file with mandatory
* record locking this should behave the same
* as an ordinary file
*/
(void)run_test(O_CREAT | O_RDWR | O_TRUNC,
S_ENFMT | S_IRUSR | S_IWUSR, 0, 0, 36);
testcheck_end(fail, "Block 2, test 1");
/* Now try negative values for L_start and L_len */
(void)run_test(O_CREAT | O_RDWR | O_TRUNC,
S_ENFMT | S_IRUSR | S_IWUSR, 5, 36, 45);
testcheck_end(fail, "Block 2, test 2");
} else {
tst_resm(TCONF, "Skip block 2 as NFS does not"
" support mandatory locking");
}
tst_resm(TINFO, "Exit block 2");
/* //block3: */
tst_resm(TINFO, "Enter block 3");
fail = 0;
/*
* Check that proper error status is returned when invalid
* argument used for WHENCE (negative value)
*/
fd = SAFE_OPEN(cleanup, tmpname, O_CREAT | O_RDWR | O_TRUNC,
0777);
if (write(fd, FILEDATA, 10) < 0)
tst_brkm(TBROK, cleanup, "write failed");
flock.l_type = F_WRLCK;
flock.l_whence = -1;
flock.l_start = 0L;
flock.l_len = 0L;
if ((fcntl(fd, F_SETLK, &flock)) < 0) {
if (errno != EINVAL) {
tst_resm(TFAIL, "Expected %d got %d",
EINVAL, errno);
fail = 1;
}
} else {
tst_resm(TFAIL, "Lock succeeded when it should have "
"failed");
fail = 1;
}
close(fd);
unlink(tmpname);
testcheck_end(fail, "Test with negative whence locking");
tst_resm(TINFO, "Exit block 3");
/* //block4: */
tst_resm(TINFO, "Enter block 4");
fail = 0;
/*
* Check that a lock on end of file is still valid when
* additional data is appended to end of file and a new
* process attempts to lock new data
*/
fd = SAFE_OPEN(cleanup, tmpname, O_CREAT | O_RDWR | O_TRUNC,
0777);
if (write(fd, FILEDATA, 10) < 0)
tst_brkm(TBROK, cleanup, "write failed");
thiscase = &testcases[58];
flock.l_type = thiscase->a_type;
flock.l_whence = thiscase->a_whence;
flock.l_start = thiscase->a_start;
flock.l_len = thiscase->a_len;
/* Set the initial parent lock on the file */
if ((fcntl(fd, F_SETLK, &flock)) < 0) {
tst_resm(TFAIL, "First parent lock failed");
tst_resm(TFAIL, "Test case %d, errno = %d", 58, errno);
fail = 1;
}
/* Write some additional data to end of file */
if (write(fd, FILEDATA, 10) < 0)
tst_brkm(TBROK, cleanup, "write failed");
/* Mask signal to avoid race */
if (sighold(SIGUSR1) < 0)
tst_brkm(TBROK, cleanup, "sighold failed");
if ((child = FORK_OR_VFORK()) == 0) {
#ifdef UCLINUX
if (self_exec(argv0, "nddddddddd", 2, thiscase->c_type,
thiscase->c_whence, thiscase->c_start,
thiscase->c_len, thiscase->c_flag,
thiscase->a_type, fd, test, parent) < 0) {
tst_resm(TFAIL, "self_exec failed");
cleanup();
}
#else
dochild();
#endif
}
if (child < 0)
tst_brkm(TBROK|TERRNO, cleanup, "Fork failed");
/*
* Wait for a signal from the child then remove blocking lock.
* Set a 60 sec alarm to break the pause just in case the
* child doesn't terminate on its own accord
*/
(void)alarm(TIME_OUT);
(void)sigpause(SIGUSR1);
/* turn off the alarm timer */
(void)alarm((unsigned)0);
if (got1 != 1) {
tst_resm(TINFO, "Pause terminated without signal "
"SIGUSR1 from child");
}
got1 = 0;
/*
* Set up lock structure for parent to delete
* blocking lock then wait for child to exit
*/
flock.l_type = F_UNLCK;
flock.l_whence = 0;
flock.l_start = 0L;
flock.l_len = 0L;
if ((fcntl(fd, F_SETLK, &flock)) < 0) {
tst_resm(TFAIL, "Attempt to release parent lock "
"failed");
tst_resm(TFAIL, "Test case %d, errno = %d", test + 1,
errno);
fail = 1;
}
/*
* set a 60 sec alarm to break the wait just in case the
* child doesn't terminate on its own accord
*/
(void)alarm(TIME_OUT);
waitpid(child, &status, 0);
if (WEXITSTATUS(status) != 0) {
fail = 1;
tst_resm(TFAIL, "child returned bad exit status");
}
/* turn off the alarm clock */
(void)alarm((unsigned)0);
if (status != 0) {
tst_resm(TFAIL, "child returned status 0x%x", status);
fail = 1;
}
close(fd);
unlink(tmpname);
testcheck_end(fail, "Test of locks on file");
tst_resm(TINFO, "Exit block 4");
}
cleanup();
tst_exit();
}