e2fsck/iscan.c

   1 /*
   2  * Test to see how quickly we can scan the inode table (not doing
   3  * anything else)
   4  */
   5
   6 #include "config.h"
   7 #include <string.h>
   8 #include <fcntl.h>
   9 #include <ctype.h>
  10 #include <termios.h>
  11 #include <time.h>
  12 #ifdef HAVE_GETOPT_H
  13 #include <getopt.h>
  14 #endif
  15 #include <unistd.h>
  16 #ifdef HAVE_ERRNO_H
  17 #include <errno.h>
  18 #endif
  19 #include <sys/ioctl.h>
  20 #ifdef HAVE_MALLOC_H
  21 #include <malloc.h>
  22 #endif
  23 #include <sys/time.h>
  24 #include <sys/resource.h>
  25
  26 #if EXT2_FLAT_INCLUDES
  27 #include "ext2_fs.h"
  28 #include "ext2fs.h"
  29 #include "blkid.h"
  30 #else
  31 #include "ext2fs/ext2_fs.h"
  32 #include "ext2fs/ext2fs.h"
  33 #include "blkid/blkid.h"
  34 #endif
  35
  36 #include "et/com_err.h"
  37 #include "../version.h"
  38
  39 struct resource_track {
  40         struct timeval time_start;
  41         struct timeval user_start;
  42         struct timeval system_start;
  43         void    *brk_start;
  44         unsigned long long bytes_read;
  45         unsigned long long bytes_written;
  46 };
  47
  48 extern int isatty(int);
  49
  50 const char * program_name = "iscan";
  51 const char * device_name = NULL;
  52
  53 int yflag = 0;
  54 int nflag = 0;
  55 int preen = 0;
  56 int inode_buffer_blocks = 0;
  57 int invalid_bitmaps = 0;
  58
  59 struct resource_track   global_rtrack;
  60
  61 void init_resource_track(struct resource_track *track, io_channel channel)
  62 {
  63 #ifdef HAVE_GETRUSAGE
  64         struct rusage r;
  65 #endif
  66         io_stats io_start = 0;
  67
  68         track->brk_start = sbrk(0);
  69         gettimeofday(&track->time_start, 0);
  70 #ifdef HAVE_GETRUSAGE
  71 #ifdef sun
  72         memset(&r, 0, sizeof(struct rusage));
  73 #endif
  74         getrusage(RUSAGE_SELF, &r);
  75         track->user_start = r.ru_utime;
  76         track->system_start = r.ru_stime;
  77 #else
  78         track->user_start.tv_sec = track->user_start.tv_usec = 0;
  79         track->system_start.tv_sec = track->system_start.tv_usec = 0;
  80 #endif
  81         track->bytes_read = 0;
  82         track->bytes_written = 0;
  83         if (channel && channel->manager && channel->manager->get_stats)
  84                 channel->manager->get_stats(channel, &io_start);
  85         if (io_start) {
  86                 track->bytes_read = io_start->bytes_read;
  87                 track->bytes_written = io_start->bytes_written;
  88         }
  89 }
  90
  91 static float timeval_subtract(struct timeval *tv1,
  92                                        struct timeval *tv2)
  93 {
  94         return ((tv1->tv_sec - tv2->tv_sec) +
  95                 ((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
  96 }
  97
  98 void print_resource_track(const char *desc,
  99                           struct resource_track *track, io_channel channel)
 100 {
 101 #ifdef HAVE_GETRUSAGE
 102         struct rusage r;
 103 #endif
 104         struct timeval time_end;
 105
 106         gettimeofday(&time_end, 0);
 107
 108         if (desc)
 109                 printf("%s: ", desc);
 110
 111 #define kbytes(x)       (((unsigned long long)(x) + 1023) / 1024)
 112 #ifdef HAVE_MALLINFO
 113         /* don't use mallinfo() if over 2GB used, since it returns "int" */
 114         if ((char *)sbrk(0) - (char *)track->brk_start < 2LL << 30) {
 115                 struct mallinfo malloc_info = mallinfo();
 116
 117                 printf("Memory used: %lluk/%lluk (%lluk/%lluk), ",
 118                        kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
 119                        kbytes(malloc_info.uordblks),
 120                        kbytes(malloc_info.fordblks));
 121         } else
 122 #endif
 123                 printf("Memory used: %lluk, ",
 124                        kbytes(((char *)sbrk(0)) - ((char *)track->brk_start)));
 125
 126 #ifdef HAVE_GETRUSAGE
 127         getrusage(RUSAGE_SELF, &r);
 128
 129         printf("time: %5.2f/%5.2f/%5.2f\n",
 130                timeval_subtract(&time_end, &track->time_start),
 131                timeval_subtract(&r.ru_utime, &track->user_start),
 132                timeval_subtract(&r.ru_stime, &track->system_start));
 133 #else
 134         printf("elapsed time: %6.3f\n",
 135                timeval_subtract(&time_end, &track->time_start));
 136 #endif
 137 #define mbytes(x)       (((x) + 1048575) / 1048576)
 138         if (channel && channel->manager && channel->manager->get_stats) {
 139                 io_stats delta = 0;
 140                 unsigned long long bytes_read = 0;
 141                 unsigned long long bytes_written = 0;
 142
 143                 if (desc)
 144                         printf("%s: ", desc);
 145
 146                 channel->manager->get_stats(channel, &delta);
 147                 if (delta) {
 148                         bytes_read = delta->bytes_read - track->bytes_read;
 149                         bytes_written = delta->bytes_written -
 150                                 track->bytes_written;
 151                 }
 152                 printf("I/O read: %lluMB, write: %lluMB, "
 153                        "rate: %.2fMB/s\n",
 154                        mbytes(bytes_read), mbytes(bytes_written),
 155                        (double)mbytes(bytes_read + bytes_written) /
 156                        timeval_subtract(&time_end, &track->time_start));
 157         }
 158 }
 159
 160 static void usage(void)
 161 {
 162         fprintf(stderr,
 163                 "Usage: %s [-F] [-I inode_buffer_blocks] device\n",
 164                 program_name);
 165         exit(1);
 166 }
 167
 168 static void PRS(int argc, char *argv[])
 169 {
 170         int             flush = 0;
 171         int             c;
 172 #ifdef MTRACE
 173         extern void     *mallwatch;
 174 #endif
 175         errcode_t       retval;
 176
 177         setbuf(stdout, NULL);
 178         setbuf(stderr, NULL);
 179         initialize_ext2_error_table();
 180
 181         if (argc && *argv)
 182                 program_name = *argv;
 183         while ((c = getopt (argc, argv, "FI")) != EOF)
 184                 switch (c) {
 185                 case 'F':
 186                         flush = 1;
 187                         break;
 188                 case 'I':
 189                         inode_buffer_blocks = atoi(optarg);
 190                         break;
 191                 default:
 192                         usage ();
 193                 }
 194         device_name = argv[optind];
 195         if (flush) {
 196                 int     fd = open(device_name, O_RDONLY, 0);
 197
 198                 if (fd < 0) {
 199                         com_err("open", errno,
 200                             "while opening %s for flushing", device_name);
 201                         exit(1);
 202                 }
 203                 if ((retval = ext2fs_sync_device(fd, 1))) {
 204                         com_err("ext2fs_sync_device", retval,
 205                                 "while trying to flush %s", device_name);
 206                         exit(1);
 207                 }
 208                 close(fd);
 209         }
 210 }
 211
 212 int main (int argc, char *argv[])
 213 {
 214         errcode_t       retval = 0;
 215         int             exit_value = 0;
 216         ext2_filsys     fs;
 217         ext2_ino_t      ino;
 218         __u32   num_inodes = 0;
 219         struct ext2_inode inode;
 220         ext2_inode_scan scan;
 221
 222         PRS(argc, argv);
 223
 224         retval = ext2fs_open(device_name, 0,
 225                              0, 0, unix_io_manager, &fs);
 226         if (retval) {
 227                 com_err(program_name, retval, "while trying to open '%s'",
 228                         device_name);
 229                 exit(1);
 230         }
 231
 232         init_resource_track(&global_rtrack, fs->io);
 233
 234         retval = ext2fs_open_inode_scan(fs, inode_buffer_blocks, &scan);
 235         if (retval) {
 236                 com_err(program_name, retval, "while opening inode scan");
 237                 exit(1);
 238         }
 239
 240         while (1) {
 241                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
 242                 if (retval) {
 243                         com_err(program_name, retval,
 244                                 "while getting next inode");
 245                         exit(1);
 246                 }
 247                 if (ino == 0)
 248                         break;
 249                 num_inodes++;
 250         }
 251
 252         print_resource_track(NULL, &global_rtrack, fs->io);
 253         printf("%u inodes scanned.\n", num_inodes);
 254
 255         exit(0);
 256 }