lustre/tests/statmany.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <errno.h>
   6 #include <string.h>
   7 #include <fcntl.h>
   8 #include <getopt.h>
   9 #include <unistd.h>
  10 #include <time.h>
  11 #include <limits.h>
  12 #include <sys/ioctl.h>
  13
  14 #if 0
  15 #include <linux/extN_fs.h>
  16 #endif
  17 #include <liblustre.h>
  18 #include <linux/lustre_lib.h>
  19 #include <linux/obd.h>
  20
  21 struct option longopts[] = {
  22         {"ea", 0, 0, 'e'},
  23         {"lookup", 0, 0, 'l'},
  24         {"random", 0, 0, 'r'},
  25         {"stat", 0, 0, 's'},
  26         {NULL, 0, 0, 0},
  27 };
  28 char *shortopts = "ehlr:s0123456789";
  29
  30 static int usage(char *prog, FILE *out)
  31 {
  32         fprintf(out,
  33                 "Usage: %s [-r rand_seed] {-s|-e|-l} filenamebase total_files iterations\n"
  34                "-r : random seed\n"
  35                "-s : regular stat() calls\n"
  36                "-e : open then GET_EA ioctl\n"
  37                "-l : lookup ioctl only\n", prog);
  38         exit(out == stderr);
  39 }
  40
  41 #ifndef LONG_MAX
  42 #define LONG_MAX (1 << ((8 * sizeof(long)) - 1))
  43 #endif
  44
  45 int main(int argc, char ** argv)
  46 {
  47         long i, count, iter = LONG_MAX, mode, offset;
  48         long int start, length = LONG_MAX, last, rc = 0;
  49         char parent[4096], *t;
  50         char c, *prog = argv[0], *base;
  51         int seed = 0;
  52         int fd = -1;
  53
  54         while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
  55                 char *e;
  56                 switch (c) {
  57                 case 'r':
  58                         seed = strtoul(optarg, &e, 0);
  59                         if (*e) {
  60                                 fprintf(stderr, "bad -r option %s\n", optarg);
  61                                 usage(prog, stderr);
  62                         }
  63                         break;
  64                 case 'e':
  65                 case 'l':
  66                 case 's':
  67                         mode = c;
  68                         break;
  69                 case '0':
  70                 case '1':
  71                 case '2':
  72                 case '3':
  73                 case '4':
  74                 case '5':
  75                 case '6':
  76                 case '7':
  77                 case '8':
  78                 case '9':
  79                         if (length == LONG_MAX)
  80                                 length = c - '0';
  81                         else
  82                                 length = length * 10 + (c - '0');
  83                         break;
  84                 case 'h':
  85                         usage(prog, stdout);
  86                 case '?':
  87                         usage(prog, stderr);
  88                 }
  89         }
  90
  91         if (optind + 2 + (length == LONG_MAX) != argc) {
  92                 fprintf(stderr, "missing filenamebase, total_files, or iterations\n");
  93                 usage(prog, stderr);
  94         }
  95
  96         base = argv[optind];
  97         if (strlen(base) > 4080) {
  98                 fprintf(stderr, "filenamebase too long\n");
  99                 exit(1);
 100         }
 101
 102         if (seed == 0) {
 103                 int f = open("/dev/urandom", O_RDONLY);
 104
 105                 if (f < 0 || read(f, &seed, sizeof(seed)) < sizeof(seed))
 106                         seed = time(0);
 107                 if (f > 0)
 108                         close(f);
 109         }
 110
 111         printf("using seed %u\n", seed);
 112         srand(seed);
 113
 114         count = strtoul(argv[optind + 1], NULL, 0);
 115         if (length == LONG_MAX) {
 116                 iter = strtoul(argv[optind + 2], NULL, 0);
 117                 printf("running for %lu iterations\n", iter);
 118         } else
 119                 printf("running for %lu seconds\n", length);
 120
 121         start = last = time(0);
 122
 123         t = strrchr(base, '/');
 124         if (t == NULL) {
 125                 strcpy(parent, ".");
 126                 offset = -1;
 127         } else {
 128                 strncpy(parent, base, t - base);
 129                 offset = t - base + 1;
 130         }
 131
 132         if (mode == 'l') {
 133                 fd = open(parent, O_RDONLY);
 134                 if (fd < 0) {
 135                         printf("open(%s) error: %s\n", parent,
 136                                strerror(errno));
 137                         exit(errno);
 138                 }
 139         }
 140
 141         for (i = 0; i < iter && time(0) - start < length; i++) {
 142                 char filename[4096];
 143                 int tmp;
 144
 145                 tmp = random() % count;
 146                 sprintf(filename, "%s%d", base, tmp);
 147
 148                 if (mode == 'e') {
 149 #if 0
 150                         fd = open(filename, O_RDWR|O_LARGEFILE);
 151                         if (fd < 0) {
 152                                 printf("open(%s) error: %s\n", filename,
 153                                        strerror(errno));
 154                                 break;
 155                         }
 156                         rc = ioctl(fd, EXTN_IOC_GETEA, NULL);
 157                         if (rc < 0) {
 158                                 printf("ioctl(%s) error: %s\n", filename,
 159                                        strerror(errno));
 160                                 break;
 161                         }
 162                         close(fd);
 163                         break;
 164 #endif
 165                 } else if (mode == 's') {
 166                         struct stat buf;
 167
 168                         rc = stat(filename, &buf);
 169                         if (rc < 0) {
 170                                 printf("stat(%s) error: %s\n", filename,
 171                                        strerror(errno));
 172                                 break;
 173                         }
 174                 } else if (mode == 'l') {
 175                         struct obd_ioctl_data data;
 176                         char rawbuf[8192];
 177                         char *buf = rawbuf;
 178                         int max = sizeof(rawbuf);
 179
 180                         memset(&data, 0, sizeof(data));
 181                         data.ioc_version = OBD_IOCTL_VERSION;
 182                         data.ioc_len = sizeof(data);
 183                         if (offset >= 0)
 184                                 data.ioc_inlbuf1 = filename + offset;
 185                         else
 186                                 data.ioc_inlbuf1 = filename;
 187                         data.ioc_inllen1 = strlen(data.ioc_inlbuf1) + 1;
 188
 189                         if (obd_ioctl_pack(&data, &buf, max)) {
 190                                 printf("ioctl_pack failed.\n");
 191                                 break;
 192                         }
 193
 194                         rc = ioctl(fd, IOC_MDC_LOOKUP, buf);
 195                         if (rc < 0) {
 196                                 printf("ioctl(%s) error: %s\n", filename,
 197                                        strerror(errno));
 198                                 break;
 199                         }
 200                 }
 201                 if ((i % 10000) == 0) {
 202                         printf(" - stat %lu (time %ld ; total %ld ; last %ld)\n",
 203                                i, time(0), time(0) - start, time(0) - last);
 204                         last = time(0);
 205                 }
 206         }
 207
 208         if (mode == 'l')
 209                 close(fd);
 210
 211         printf("total: %lu stats in %ld seconds: %f stats/second\n", i,
 212                time(0) - start, ((float)i / (time(0) - start)));
 213
 214         exit(rc);
 215 }