diff options
Diffstat (limited to 'checkfs/checkfs.c')
| -rw-r--r-- | checkfs/checkfs.c | 695 |
1 files changed, 0 insertions, 695 deletions
diff --git a/checkfs/checkfs.c b/checkfs/checkfs.c deleted file mode 100644 index da2d0c4..0000000 --- a/checkfs/checkfs.c +++ /dev/null @@ -1,695 +0,0 @@ -/* - - * Copyright Daniel Industries. - * - * Created by: Vipin Malik (vipin.malik@daniel.com) - * - * This code is released under the GPL version 2. See the file COPYING - * for more details. - * - * Software distributed under the Licence is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. - * See the Licence for the specific language governing rights and - * limitations under the Licence. - - This program opens files in progression (file00001, file00002 etc), - upto MAX_NUM_FILES and checks their CRC. If a file is not found or the - CRC does not match it stops it's operation. - - Everything is logged in a logfile called './logfile'. - - If everything is ok this program sends a signal, via com1, to the remote - power control box to power cycle this computer. - - This program then proceeds to create new files file0....file<MAX_NUM_FILES> - in a endless loop and checksum each before closing them. - - STRUCTURE OF THE FILES: - The fist int is the size of the file in bytes. - The last 2 bytes are the CRC for the entire file. - There is random data in between. - - The files are opened in the current dir. - - $Id: checkfs.c,v 1.8 2005/11/07 11:15:17 gleixner Exp $ - $Log: checkfs.c,v $ - Revision 1.8 2005/11/07 11:15:17 gleixner - [MTD / JFFS2] Clean up trailing white spaces - - Revision 1.7 2001/06/21 23:04:17 dwmw2 - Initial import to MTD CVS - - Revision 1.6 2001/06/08 22:26:05 vipin - Split the modbus comm part of the program (that sends the ok to pwr me down - message) into another file "comm.c" - - Revision 1.5 2001/06/08 21:29:56 vipin - fixed small issue with write() checking for < 0 instead of < (bytes to be written). - Now it does the latter (as it should). - - Revision 1.4 2001/05/11 22:29:40 vipin - Added a test to check and err out if the first int in file (which tells us - how many bytes there are in the file) is zero. This will prevent a corrupt - file with zero's in it from passing the crc test. - - Revision 1.3 2001/05/11 21:33:54 vipin - Changed to use write() rather than fwrite() when creating new file. Additionally, - and more important, it now does a single write() for the entire data. This will - enable us to use this program to test for power fail *data* reliability when - writing over an existing file, specially on powr fail "safe" file systems as - jffs/jffs2. Also added a new cmdline parameter "-e" that specifies the max # of - errors that can be tolerated. This should be set to ZERO to test for the above, - as old data should be reliabily maintained if the newer write never "took" before - power failed. If the write did succeed, then the newer data will have its own - CRC in place when it gets checked => hence no error. In theory at least! - - - Revision 1.2 2001/05/11 19:27:33 vipin - Added cmd line args to change serial port, and specify max size of - random files created. Some cleanup. Added -Wall to Makefile. - - Revision 1.1 2001/05/11 16:06:28 vipin - Importing checkfs (the power fail test program) into CVS. This was - originally done for NEWS. NEWS had a lot of version, this is - based off the last one done for NEWS. The "makefiles" program - is run once initially to create the files in the current dir. - "checkfs" is then run on every powerup to check consistancy - of the files. See checkfs.c for more details. - - -*/ -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> -#include <termios.h> -#include <unistd.h> -#include <errno.h> -#include <unistd.h> -#include <string.h> -#include <time.h> -#include "common.h" - - - -extern int do_pwr_dn(int fd, int cycleCnt); - -#define CMDLINE_PORT "-p" -#define CMDLINE_MAXFILEBYTES "-s" -#define CMDLINE_MAXERROR "-e" -#define CMDLINE_HELPSHORT "-?" -#define CMDLINE_HELPLONG "--help" - - -int CycleCount; - -char SerialDevice[255] = "/dev/ttyS0"; /* default, can be changed - through cmd line. */ - -#define MAX_INTS_ALLOW 100000 /* max # of int's in the file written. - Statis limit to size struct. */ -float FileSizeMax = 1024.0; /*= (file size in bytes), MUST be float*/ - -int MaxErrAllowed = 1; /* default, can ge changed thru cmd line*/ - - -/* Needed for CRC generation/checking */ -static const unsigned short crc_ccitt_table[] = { - 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, - 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, - 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, - 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, - 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, - 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, - 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, - 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, - 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, - 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, - 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, - 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, - 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, - 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, - 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, - 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, - 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, - 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, - 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, - 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, - 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, - 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, - 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, - 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, - 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, - 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, - 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, - 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, - 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, - 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, - 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, - 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 -}; - - -/* - Set's up the Linux serial port. Must be passed string to device to - open. Parameters are fixed to 9600,e,1 - - [A possible enhancement to this program would be to pass these - parameters via the command line.] - - Returns file descriptor to open port. Use this fd to write to port - and close it later, when done. -*/ -int setupSerial (const char *dev) { - int i, fd; - struct termios tios; - - fd = open(dev,O_RDWR | O_NDELAY ); - if (fd < 0) { - fprintf(stderr, "%s: %s\n", dev, sys_errlist[errno]); - exit(1); - } - if (tcgetattr(fd, &tios) < 0) { - fprintf(stderr,"Could not get terminal attributes: %s",sys_errlist[errno]); - exit(1); - } - - tios.c_cflag = - CS7 | - CREAD | // Enable Receiver - HUPCL | // Hangup after close - CLOCAL | // Ignore modem control lines - PARENB; // Enable parity (even by default) - - - - tios.c_iflag = IGNBRK; // Ignore break - tios.c_oflag = 0; - tios.c_lflag = 0; - for(i = 0; i < NCCS; i++) { - tios.c_cc[i] = '\0'; // no special characters - } - tios.c_cc[VMIN] = 1; - tios.c_cc[VTIME] = 0; - - cfsetospeed (&tios, B9600); - cfsetispeed (&tios, B9600); - - if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { - fprintf(stderr,"Could not set attributes: ,%s",sys_errlist[errno]); - exit(1); - } - return fd; -} - - - - - -//A portion of this code was taken from the AX.25 HDLC packet driver -//in LINUX. Once I test and have a better understanding of what -//it is doing, it will be better commented. - -//For now one can speculate that the CRC routine always expects the -//CRC to calculate out to 0xf0b8 (the hardcoded value at the end) -//and returns TRUE if it is and FALSE if it doesn't. -//Why don't people document better!!!! -int check_crc_ccitt(char *filename) -{ - FILE *fp; - FILE *logfp; - unsigned short crc = 0xffff; - int len; - char dataByte; - int retry; - char done; - - fp = fopen(filename,"rb"); - if(!fp){ - logfp = fopen("logfile","a"); /*open for appending only.*/ - fprintf(logfp, "Verify checksum:Error! Cannot open filename passed for verify checksum: %s\n",filename); - fclose(logfp); - return FALSE; - } - - - /*the first int contains an int that is the length of the file in long.*/ - if(fread(&len, sizeof(int), 1, fp) != 1){ - logfp = fopen("logfile","a"); /*open for appending only.*/ - fprintf(logfp, "verify checksum:Error reading from file: %s\n", filename); - fclose(fp); - fclose(logfp); - return FALSE; - } - - /* printf("Checking %i bytes for CRC in \"%s\".\n", len, filename); */ - - /* Make sure that we did not read 0 as the number of bytes in file. This - check prevents a corrupt file with zero's in it from passing the - CRC test. A good file will always have some data in it. */ - if(len == 0) - { - - logfp = fopen("logfile","a"); /*open for appending only.*/ - fprintf(logfp, "verify checksum: first int claims there are 0 data in file. Error!: %s\n", filename); - fclose(fp); - fclose(logfp); - return FALSE; - } - - - rewind(fp); - len+=2; /*the file has two extra bytes at the end, it's checksum. Those - two MUST also be included in the checksum calculation. - */ - - for (;len>0;len--){ - retry=5; /*retry 5 times*/ - done = FALSE; - while(!done){ - if(fread(&dataByte, sizeof(char), 1, fp) != 1){ - retry--; - }else{ - done = TRUE; - } - if(retry == 0){ - done = TRUE; - } - } - if(!retry){ - logfp = fopen("logfile","a"); /*open for appending only.*/ - fprintf(logfp, "Unexpected end of file: %s\n", filename); - fprintf(logfp, "...bytes left to be read %i.\n",len); - fclose(logfp); - fclose(fp); - return FALSE; - } - crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ dataByte) & 0xff]; - } - fclose(fp); - if( (crc & 0xffff) != 0xf0b8){ - /*printf("The CRC of read file:%x\n", crc); */ - return FALSE; - } - return TRUE; -}/*end check_crc_ccitt() */ - - - -/* - Sends "OK to power me down" message to the remote - power cycling box, via the serial port. - Also updates the num power cycle count in a local - file. - This file "./cycleCnt" must be present. This is - initially (and once) created by the separate "makefiles.c" - program. -*/ -void send_pwrdn_ok(void){ - - int fd; - FILE *cyclefp; - int cycle_fd; - - cyclefp = fopen("cycleCnt","rb"); - if(!cyclefp){ - printf("expecting file \"cycleCnt\". Cannot continue.\n"); - exit(1); - } - if(fread(&CycleCount, sizeof(CycleCount),1,cyclefp) != 1){ - fprintf(stderr, "Error! Unexpected end of file cycleCnt.\n"); - exit(1); - } - fclose(cyclefp); - - CycleCount++; - - /*now write this puppy back*/ - cyclefp = fopen("cycleCnt","wb"); - cycle_fd = fileno(cyclefp); - if(!cyclefp){ - fprintf(stderr, "Error! cannot open file for write:\"cycleCnt\". Cannot continue.\n"); - exit(1); - } - if(fwrite(&CycleCount, sizeof(CycleCount), 1,cyclefp) !=1){ - fprintf(stderr, "Error writing to file cycleCnt. Cannot continue.\n"); - exit(1); - } - if(fdatasync(cycle_fd)){ - fprintf(stderr, "Error! cannot sync file buffer with disk.\n"); - exit(1); - } - - fclose(cyclefp); - (void)sync(); - - printf("\n\n Sending Power down command to the remote box.\n"); - fd = setupSerial(SerialDevice); - - if(do_pwr_dn(fd, CycleCount) < 0) - { - fprintf(stderr, "Error sending power down command.\n"); - exit(1); - } - - close(fd); -}//end send_pwrnd_ok() - - - - -/* - Appends 16bit CRC at the end of numBytes long buffer. - Make sure buf, extends at least 2 bytes beyond. - */ -void appendChecksum(char *buf, int numBytes){ - - unsigned short crc = 0xffff; - int index = 0; - - /* printf("Added CRC (2 bytes) to %i bytes.\n", numBytes); */ - - for (; numBytes > 0; numBytes--){ - - crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ buf[index++]) & 0xff]; - } - crc ^= 0xffff; - /*printf("The CRC: %x\n\n", crc);*/ - - buf[index++] = crc; - buf[index++] = crc >> 8; - - - -}/*end checksum()*/ - - - - - -/* - This guy make a new "random data file" with the filename - passed to it. This file is checksummed with the checksum - stored at the end. The first "int" in the file is the - number of int's in it (this is needed to know how much - data to read and checksum later). -*/ -void make_new_file(char *filename){ - - - int dfd; /* data file descriptor */ - int rand_data; - int data_size; - int temp_size; - int dataIndex = 0; - int err; - - - struct { - int sizeInBytes; /* must be int */ - int dataInt[MAX_INTS_ALLOW+1]; /* how many int's can we write? */ - }__attribute((packed)) dataBuf; - - - fprintf(stderr, "Creating File:%s. ", filename); - - if((dfd = open(filename, O_RDWR | O_CREAT | O_SYNC)) <= 0) - { - printf("Error! Cannot open file: %s\n",filename); - perror("Error"); - exit(1); - } - - /*now write a bunch of random binary data to the file*/ - /*first figure out how much data to write. That is random also.*/ - - /*file should not be less than 5 ints long. (so that we have decent length files, - that's all)*/ - while( - ((data_size = (int)(1+(int)((FileSizeMax/sizeof(int))*rand()/(RAND_MAX+1.0)))) < 5) - ); - - /* printf("Writing %i ints to the file.\n", data_size); */ - - temp_size = data_size * sizeof(int); - - /* Make sure that all data is written in one go! This is important to - check for reliability of file systems like JFFS/JFFS that purport to - have "reliable" writes during powre fail. - */ - - dataBuf.sizeInBytes = temp_size; - - data_size--; /*one alrady written*/ - dataIndex = 0; - - while(data_size--){ - rand_data = (int)(1 + (int)(10000.0*rand()/(RAND_MAX+1.0))); - - dataBuf.dataInt[dataIndex++] = rand_data; - - } - - /*now calculate the file checksum and append it to the end*/ - appendChecksum((char *)&dataBuf, dataBuf.sizeInBytes); - - /* Don't forget to increase the size of data written by the 2 chars of CRC at end. - These 2 bytes are NOT included in the sizeInBytes field. */ - if((err = write(dfd, (void *)&dataBuf, dataBuf.sizeInBytes + sizeof(short))) < - (dataBuf.sizeInBytes + sizeof(short)) - ) - { - printf("Error writing data buffer to file. Written %i bytes rather than %i bytes.", - err, dataBuf.sizeInBytes); - perror("Error"); - exit(1); - } - - /* Now that the data is (hopefully) safely written. I can truncate the file to the new - length so that I can reclaim any unused space, if the older file was larger. - */ - if(ftruncate(dfd, dataBuf.sizeInBytes + sizeof(short)) < 0) - { - perror("Error: Unable to truncate file."); - exit(1); - } - - - close(dfd); - - -}//end make_new_file() - - - -/* - Show's help on stdout - */ -void printHelp(char **argv) -{ - printf("Usage:%s <options, defined below>\n", argv[0]); - printf("%s </dev/ttyS0,1,2...>: Set com port to send ok to pwr dn msg on\n", - CMDLINE_PORT); - printf("%s <n>: Set Max size in bytes of each file to be created.\n", - CMDLINE_MAXFILEBYTES); - printf("%s <n>: Set Max errors allowed when checking all files for CRC on start.\n", - CMDLINE_MAXERROR); - printf("%s or %s: This Help screen.\n", CMDLINE_HELPSHORT, - CMDLINE_HELPLONG); - -}/* end printHelp()*/ - - - -void processCmdLine(int argc, char **argv) -{ - - int cnt; - - /* skip past name of this program, process rest */ - for(cnt = 1; cnt < argc; cnt++) - { - if(strcmp(argv[cnt], CMDLINE_PORT) == 0) - { - strncpy(SerialDevice, argv[++cnt], sizeof(SerialDevice)); - continue; - }else - if(strcmp(argv[cnt], CMDLINE_MAXFILEBYTES) == 0) - { - FileSizeMax = (float)atoi(argv[++cnt]); - if(FileSizeMax > (MAX_INTS_ALLOW*sizeof(int))) - { - printf("Max file size allowd is %i.\n", - MAX_INTS_ALLOW*sizeof(int)); - exit(0); - } - - continue; - }else - if(strcmp(argv[cnt], CMDLINE_HELPSHORT) == 0) - { - printHelp(argv); - exit(0); - - }else - if(strcmp(argv[cnt], CMDLINE_HELPLONG) == 0) - { - printHelp(argv); - exit(0); - }else - - if(strcmp(argv[cnt], CMDLINE_MAXERROR) == 0) - { - MaxErrAllowed = atoi(argv[++cnt]); - } - else - { - printf("Unknown cmd line option:%s\n", argv[cnt]); - printHelp(argv); - exit(0); - - } - } - - -}/* end processCmdLine() */ - - - - - -int main(int argc, char **argv){ - - FILE *logfp; - int log_fd; - char filename[30]; - short filenameCounter = 0; - unsigned short counter; - unsigned short numberFiles; - char error = FALSE; - short errorCnt = 0; - time_t timep; - char * time_string; - unsigned int seed; - - - numberFiles = MAX_NUM_FILES; - - if(argc >= 1) - { - processCmdLine(argc, argv); - } - - - /* - First open MAX_NUM_FILES and make sure that the checksum is ok. - Also make an intry into the logfile. - */ - /* timestamp! */ - time(&timep); - time_string = (char *)ctime((time_t *)&timep); - - /*start a new check, make a log entry and continue*/ - logfp = fopen("logfile","a"); /*open for appending only.*/ - log_fd = fileno(logfp); - fprintf(logfp,"%s", time_string); - fprintf(logfp,"Starting new check.\n"); - if(fdatasync(log_fd) == -1){ - fprintf(stderr,"Error! Cannot sync file data with disk.\n"); - exit(1); - } - - fclose(logfp); - (void)sync(); - - /* - Now check all random data files in this dir. - */ - for(counter=0;counter<MAX_NUM_FILES;counter++){ - - fprintf(stderr, "%i.", counter); - - /*create the filename in sequence. The number of files - to check and the algorithm to create the filename is - fixed and known in advance.*/ - sprintf(filename,"file%i",filenameCounter++); - - if(!check_crc_ccitt(filename)){ - /*oops, checksum does not match. Make an entry into the log file - and decide if we can continue or not.*/ - fprintf(stderr, "crcError:%s ", filename); - logfp = fopen("logfile","a"); /*open for appending only.*/ - log_fd = fileno(logfp); - fprintf(logfp,"CRC error in file: %s\n", filename); - if(fdatasync(log_fd) == -1){ - fprintf(stderr,"Error! Cannot sync file data with disk.\n"); - exit(1); - } - fclose(logfp); - (void)sync(); - - error = TRUE; - errorCnt++; - - if(errorCnt > MaxErrAllowed){ - logfp = fopen("logfile","a"); /*open for appending only.*/ - log_fd = fileno(logfp); - fprintf(logfp,"\nMax Error count exceed. Stopping!\n"); - if(fdatasync(log_fd) == -1){ - fprintf(stderr,"Error! Cannot sync file data with disk.\n"); - exit(1); - } - fclose(logfp); - (void)sync(); - - fprintf(stderr, "Too many errors. See \"logfile\".\n"); - exit(1); - }/* if too many errors */ - - /*we have decided to continue, however first repair this file - so that we do not cumulate errors across power cycles.*/ - make_new_file(filename); - } - }//for - - /*all files checked, make a log entry and continue*/ - logfp = fopen("logfile","a"); /*open for appending only.*/ - log_fd = fileno(logfp); - fprintf(logfp,"All files checked. Total errors found: %i\n\n", errorCnt); - if(fdatasync(log_fd)){ - fprintf(stderr, "Error! cannot sync file buffer with disk.\n"); - exit(1); - } - - fclose(logfp); - (void)sync(); - - /*now send a message to the remote power box and have it start a random - pwer down timer after which power will be killed to this unit. - */ - send_pwrdn_ok(); - - /*now go into a forever loop of writing to files and CRC'ing them on - a continious basis.*/ - - /*start from a random file #*/ - /*seed rand based on the current time*/ - seed = (unsigned int)time(NULL); - srand(seed); - - filenameCounter=(int)(1+(int)((float)(MAX_NUM_FILES-1)*rand()/(RAND_MAX+1.0))); - - while(1){ - - for(;filenameCounter<MAX_NUM_FILES;filenameCounter++){ - - /*create the filename in sequence*/ - sprintf(filename,"file%i",filenameCounter); - make_new_file(filename); - } - filenameCounter = 0; - } - - exit(0); /* though we will never reach here, but keeps the compiler happy*/ -}/*end main()*/ |