From: Subrata <sub...@us...> - 2008-02-28 14:51:05
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Update of /cvsroot/ltp/ltp/testcases/kernel/controllers/libcontrollers In directory sc8-pr-cvs6.sourceforge.net:/tmp/cvs-serv21184/ltp/testcases/kernel/controllers/libcontrollers Added Files: Makefile libcontrollers.c libcontrollers.h Log Message: Initial Set of CPU CONTROLLERS Test Cases. This patch adds a library for cpu controller testing. The library contains the common functions used by all test cases. These functions will be further used in testcases for memory controller also. In addition to the library code this patch also contains the changes required to call and use library functions in testcase 1(2). Signed-off-by: Sudhir Kumar <sk...@li...> --- NEW FILE: libcontrollers.c --- #include "libcontrollers.h" /* * Function: scan_shares_file() * This function scans all the shares files under the mountpoint * of the controller and returns the total added shares of all * the groups (currently excludes default group) ?? */ int scan_shares_files () { struct stat statbuffer; DIR *dp; char *path_pointer; /* * Check if we can get stat of the file */ if (lstat (fullpath, &statbuffer) < 0) error_function("Can not read stat for file ", fullpath); if (S_ISDIR (statbuffer.st_mode) == 0) /* not a directory */ { /* * We run all user tasks in the created groups and not default groups. So * exclude the shares of default group. FLAG to ensure dir_pointer is non NULL */ if ((FLAG == 1) && (strcmp(fullpath, "/dev/cpuctl/cpu.shares") != 0) &&\ (strcmp (dir_pointer->d_name, "cpu.shares") == 0)) { *shares_pointer += read_shares_file (fullpath); } return 0; } /* * Now it's a directory. let the path_pointer point to the end * of fullpath to append new files names */ path_pointer = fullpath + strlen(fullpath); *path_pointer++ = '/'; *path_pointer = 0; if ((dp = opendir(fullpath)) == NULL) /* Error in opening directory */ error_function("Can't open ", fullpath); /* * search all groups recursively and get total shares */ while ((dir_pointer = readdir(dp)) != NULL) /* Error in reading directory */ { if ((strcmp(dir_pointer->d_name, ".") == 0) || (strcmp(dir_pointer->d_name, "..") == 0)) continue; /* ignore current and parent directory */ FLAG = 1; strcpy (path_pointer, dir_pointer->d_name ); /* append name to fullpath */ if ((retval = scan_shares_files()) != 0) break; } /* * This directory is searched fully. let us go back to parent directory again */ path_pointer[-1] = 0; if (closedir (dp) < 0) error_function("Could not close dir ", fullpath); return 0; } /* * Function: read_file () * This function is written keeping in mind the support * to read other files also if required in future. * Each file under a group contains some diff parameter/s */ int read_file(char *filepath, int action, unsigned int *value) { int num_line = 0; FILE *fp; switch (action) { case GET_SHARES: *value = read_shares_file(filepath); if (*value == -1) return -1; break; case GET_TASKS: fp = fopen (filepath, "r"); if (fp == NULL) error_function("Could not open file", filepath); while(fgets(target, LINE_MAX, fp) != NULL) num_line++; *value = (unsigned int)num_line; if (fclose (fp)) error_function ("Could not close file", filepath); break; default: error_function("Wrong action type passed to fun read_file for ", filepath); break; } return 0; } /* * Function: errir_function() * Prints error message and returns -1 */ inline int error_function(char *msg1, char *msg2) { fprintf (stdout,"ERROR: %s ", msg1); fprintf (stdout,"%s\n", msg2); return -1; } /* Function: read_shares_file() * Reads shares value from a given shares file and writes them to * the given pointer location. Returns 0 if success */ unsigned int read_shares_file (char *filepath) { FILE *fp; unsigned int shares; fp = fopen (filepath, "r"); if (fp == NULL) error_function("Could not open file", filepath); fscanf (fp, "%u", &shares); if (fclose (fp)) error_function ("Could not close file", filepath); return shares; } /* Function: write_to_file() * writes value to shares file or pid to tasks file */ int write_to_file (char *file, const char *mode, unsigned int value) { FILE *fp; fp = fopen (file, mode); if (fp == NULL) error_function ("in opening file for writing:", file); fprintf (fp, "%u\n", value); fclose (fp); return 0; } /* Function: signal_handler_alarm() * signal handler for the new action */ void signal_handler_alarm (int signal) { timer_expired = 1; } --- NEW FILE: libcontrollers.h --- #include <dirent.h> #include <limits.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #ifdef PATH_MAX char fullpath[PATH_MAX]; #else char fullpath[1024]; /* Guess */ #endif int FLAG, timer_expired; int retval; unsigned int num_line;//?? unsigned int current_shares; unsigned int total_shares; unsigned int *shares_pointer;//?? char target[LINE_MAX]; struct dirent *dir_pointer; enum{ GET_SHARES =1, GET_TASKS }; inline int error_function(char *msg1, char *msg2); unsigned int read_shares_file (char *filepath); int read_file(char *filepath, int action, unsigned int *value); int scan_shares_files (); int write_to_file (char * file, const char* mode, unsigned int value); void signal_handler_alarm (int signal ); --- NEW FILE: Makefile --- TARGET=libcontrollers.a SRCS=$(wildcard *.c) OBJS=$(patsubst %.c,%.o,$(SRCS)) all : $(TARGET) $(TARGET): $(OBJS) $(AR) -cr $@ $^ clean: rm -f $(TARGET) $(OBJS) install: |