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