| /******************************************************************************/ |
| /* Copyright (c) Crackerjack Project., 2007 */ |
| /* */ |
| /* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ |
| /* */ |
| /******************************************************************************/ |
| /******************************************************************************/ |
| /* */ |
| /* File: bdflush01.c */ |
| /* */ |
| /* Description: bdflush() starts, flushes, or tunes the buffer-dirty-flush */ |
| /* daemon. Only a privileged process (one with the CAP_SYS_ADMIN */ |
| /* capability) may call bdflush(). */ |
| /* */ |
| /* If func is negative or 0, and no daemon has been started, */ |
| /* then bdflush() enters the daemon code and never returns. */ |
| /* */ |
| /* If func is 1, some dirty buffers are written to disk. */ |
| /* If func is 2 or more and is even (low bit is 0), then address */ |
| /* is the address of a long word, and the tuning parameter */ |
| /* numbered (func-2)/2 is returned to the caller in that address.*/ |
| /* */ |
| /* If func is 3 or more and is odd (low bit is 1), then data is */ |
| /* a long word, and the kernel sets tuning parameter numbered */ |
| /* (func-3)/2 to that value. */ |
| /* */ |
| /* The set of parameters, their values, and their legal ranges */ |
| /* are defined in the kernel source file fs/buffer.c. */ |
| /* */ |
| /* Return Value: */ |
| /* If func is negative or 0 and the daemon successfully starts, */ |
| /* bdflush() never returns. Otherwise, the return value is 0 on */ |
| /* success and -1 on failure, with errno set to indicate the */ |
| /* error. */ |
| /* */ |
| /* Errors: */ |
| /* EBUSY */ |
| /* An attempt was made to enter the daemon code after*/ |
| /* another process has already entered. */ |
| /* EFAULT */ |
| /* address points outside your accessible address */ |
| /* space. */ |
| /* EINVAL */ |
| /* An attempt was made to read or write an invalid */ |
| /* parameter number, or to write an invalid value to */ |
| /* a parameter. */ |
| /* EPERM */ |
| /* Caller does not have the CAP_SYS_ADMIN capability.*/ |
| /* */ |
| /* Usage: <for command-line> */ |
| /* bdflush01 [-c n] [-e][-i n] [-I x] [-p x] [-t] */ |
| /* where, -c n : Run n copies concurrently. */ |
| /* -e : Turn on errno logging. */ |
| /* -i n : Execute test n times. */ |
| /* -I x : Execute test for x seconds. */ |
| /* -P x : Pause for x seconds between iterations. */ |
| /* -t : Turn on syscall timing. */ |
| /* */ |
| /* Total Tests: 1 */ |
| /* */ |
| /* Test Name: bdflush01 */ |
| /* History: Porting from Crackerjack to LTP is done by */ |
| /* Manas Kumar Nayak maknayak@in.ibm.com> */ |
| /******************************************************************************/ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/wait.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <sys/stat.h> |
| #include <sys/kdaemon.h> |
| |
| /* Harness Specific Include Files. */ |
| #include "test.h" |
| #include "usctest.h" |
| #include "linux_syscall_numbers.h" |
| |
| /* Extern Global Variables */ |
| extern int Tst_count; /* counter for tst_xxx routines. */ |
| extern char *TESTDIR; /* temporary dir created by tst_tmpdir() */ |
| |
| /* Global Variables */ |
| char *TCID = "bdflush01"; /* Test program identifier.*/ |
| int testno; |
| int TST_TOTAL = 1; /* total number of tests in this file. */ |
| |
| /* Extern Global Functions */ |
| /******************************************************************************/ |
| /* */ |
| /* Function: cleanup */ |
| /* */ |
| /* Description: Performs all one time clean up for this test on successful */ |
| /* completion, premature exit or failure. Closes all temporary */ |
| /* files, removes all temporary directories exits the test with */ |
| /* appropriate return code by calling tst_exit() function. */ |
| /* */ |
| /* Input: None. */ |
| /* */ |
| /* Output: None. */ |
| /* */ |
| /* Return: On failure - Exits calling tst_exit(). Non '0' return code. */ |
| /* On success - Exits calling tst_exit(). With '0' return code. */ |
| /* */ |
| /******************************************************************************/ |
| extern void cleanup() { |
| /* Remove tmp dir and all files in it */ |
| TEST_CLEANUP; |
| tst_rmdir(); |
| |
| /* Exit with appropriate return code. */ |
| tst_exit(); |
| } |
| |
| /* Local Functions */ |
| /******************************************************************************/ |
| /* */ |
| /* Function: setup */ |
| /* */ |
| /* Description: Performs all one time setup for this test. This function is */ |
| /* typically used to capture signals, create temporary dirs */ |
| /* and temporary files that may be used in the course of this */ |
| /* test. */ |
| /* */ |
| /* Input: None. */ |
| /* */ |
| /* Output: None. */ |
| /* */ |
| /* Return: On failure - Exits by calling cleanup(). */ |
| /* On success - returns 0. */ |
| /* */ |
| /******************************************************************************/ |
| void setup() { |
| /* Capture signals if any */ |
| /* Create temporary directories */ |
| TEST_PAUSE; |
| tst_tmpdir(); |
| } |
| |
| int main(int ac, char **av) { |
| long data; |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| |
| /* parse standard options */ |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL){ |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| tst_exit(); |
| } |
| |
| setup(); |
| |
| /* Check looping state if -i option given */ |
| for (lc = 0; TEST_LOOPING(lc); ++lc) { |
| Tst_count = 0; |
| for (testno = 0; testno < TST_TOTAL; ++testno) { |
| TEST(syscall(__NR_bdflush,0,data)); //bdflush(0,data); |
| if(TEST_RETURN < 0){ |
| tst_resm(TFAIL|TTERRNO,"Call to bdflush() failed"); |
| cleanup(); |
| tst_exit(); |
| }else { |
| tst_resm(TPASS,"Test PASSED and %ld is returned \n",TEST_RETURN); |
| tst_resm(TINFO,"bdflush() activated...\n"); |
| cleanup(); |
| tst_exit(); |
| } |
| |
| |
| } |
| Tst_count++; |
| } |
| tst_exit(); |
| } |
| |