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