client.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <limits.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <sys/poll.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <sys/wait.h>
  11 #include <sys/mman.h>
  12 #include <netinet/in.h>
  13 #include <arpa/inet.h>
  14 #include <netdb.h>
  15
  16 #include "fio.h"
  17 #include "server.h"
  18 #include "crc/crc32.h"
  19 #include "flist.h"
  20
  21 struct fio_client {
  22         struct flist_head list;
  23         struct sockaddr_in addr;
  24         char *hostname;
  25         int fd;
  26 };
  27
  28 static FLIST_HEAD(client_list);
  29
  30 static struct fio_client *find_client_by_fd(int fd)
  31 {
  32         struct fio_client *client;
  33         struct flist_head *entry;
  34
  35         flist_for_each(entry, &client_list) {
  36                 client = flist_entry(entry, struct fio_client, list);
  37
  38                 if (client->fd == fd)
  39                         return client;
  40         }
  41
  42         return NULL;
  43 }
  44
  45 #if 0
  46 static struct fio_client *find_client_by_name(const char *name)
  47 {
  48         struct fio_client *client;
  49         struct flist_head *entry;
  50
  51         flist_for_each(entry, &client_list) {
  52                 client = flist_entry(entry, struct fio_client, list);
  53
  54                 if (!strcmp(name, client->hostname))
  55                         return client;
  56         }
  57
  58         return NULL;
  59 }
  60 #endif
  61
  62 static void remove_client(struct fio_client *client)
  63 {
  64         dprint(FD_NET, "removed client <%s>\n", client->hostname);
  65         flist_del(&client->list);
  66         nr_clients--;
  67         free(client->hostname);
  68         free(client);
  69 }
  70
  71 void fio_client_add(const char *hostname)
  72 {
  73         struct fio_client *client;
  74
  75         dprint(FD_NET, "added client <%s>\n", hostname);
  76         client = malloc(sizeof(*client));
  77         memset(client, 0, sizeof(*client));
  78         client->hostname = strdup(hostname);
  79         client->fd = -1;
  80         flist_add(&client->list, &client_list);
  81         nr_clients++;
  82 }
  83
  84 static int fio_client_connect(struct fio_client *client)
  85 {
  86         int fd;
  87
  88         dprint(FD_NET, "connect to host %s\n", client->hostname);
  89
  90         memset(&client->addr, 0, sizeof(client->addr));
  91         client->addr.sin_family = AF_INET;
  92         client->addr.sin_port = htons(fio_net_port);
  93
  94         if (inet_aton(client->hostname, &client->addr.sin_addr) != 1) {
  95                 struct hostent *hent;
  96
  97                 hent = gethostbyname(client->hostname);
  98                 if (!hent) {
  99                         log_err("fio: gethostbyname: %s\n", strerror(errno));
 100                         return 1;
 101                 }
 102
 103                 memcpy(&client->addr.sin_addr, hent->h_addr, 4);
 104         }
 105
 106         fd = socket(AF_INET, SOCK_STREAM, 0);
 107         if (fd < 0) {
 108                 log_err("fio: socket: %s\n", strerror(errno));
 109                 return 1;
 110         }
 111
 112         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
 113                 log_err("fio: connect: %s\n", strerror(errno));
 114                 return 1;
 115         }
 116
 117         client->fd = fd;
 118         return 0;
 119 }
 120
 121 int fio_clients_connect(void)
 122 {
 123         struct fio_client *client;
 124         struct flist_head *entry, *tmp;
 125         int ret;
 126
 127         flist_for_each_safe(entry, tmp, &client_list) {
 128                 client = flist_entry(entry, struct fio_client, list);
 129
 130                 ret = fio_client_connect(client);
 131                 if (ret)
 132                         remove_client(client);
 133         }
 134
 135         return !nr_clients;
 136 }
 137
 138 static int send_file_buf(struct fio_client *client, char *buf, off_t size)
 139 {
 140         return fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, size);
 141 }
 142
 143 /*
 144  * Send file contents to server backend. We could use sendfile(), but to remain
 145  * more portable lets just read/write the darn thing.
 146  */
 147 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 148 {
 149         struct stat sb;
 150         char *p, *buf;
 151         off_t len;
 152         int fd, ret;
 153
 154         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 155
 156         fd = open(filename, O_RDONLY);
 157         if (fd < 0) {
 158                 log_err("fio: job file open: %s\n", strerror(errno));
 159                 return 1;
 160         }
 161
 162         if (fstat(fd, &sb) < 0) {
 163                 log_err("fio: job file stat: %s\n", strerror(errno));
 164                 return 1;
 165         }
 166
 167         buf = malloc(sb.st_size);
 168
 169         len = sb.st_size;
 170         p = buf;
 171         do {
 172                 ret = read(fd, p, len);
 173                 if (ret > 0) {
 174                         len -= ret;
 175                         if (!len)
 176                                 break;
 177                         p += ret;
 178                         continue;
 179                 } else if (!ret)
 180                         break;
 181                 else if (errno == EAGAIN || errno == EINTR)
 182                         continue;
 183         } while (1);
 184
 185         ret = send_file_buf(client, buf, sb.st_size);
 186         free(buf);
 187         return ret;
 188 }
 189
 190 int fio_clients_send_ini(const char *filename)
 191 {
 192         struct fio_client *client;
 193         struct flist_head *entry, *tmp;
 194
 195         flist_for_each_safe(entry, tmp, &client_list) {
 196                 client = flist_entry(entry, struct fio_client, list);
 197
 198                 if (fio_client_send_ini(client, filename))
 199                         remove_client(client);
 200         }
 201
 202         return !nr_clients;
 203 }
 204
 205 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 206 {
 207         dst->max_val    = le64_to_cpu(src->max_val);
 208         dst->min_val    = le64_to_cpu(src->min_val);
 209         dst->samples    = le64_to_cpu(src->samples);
 210         /* FIXME */
 211         dst->mean       = __le64_to_cpu(src->mean);
 212         dst->S          = __le64_to_cpu(src->S);
 213 }
 214
 215 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 216 {
 217         int i, j;
 218
 219         dst->error      = le32_to_cpu(src->error);
 220         dst->groupid    = le32_to_cpu(src->groupid);
 221         dst->pid        = le32_to_cpu(src->pid);
 222         dst->members    = le32_to_cpu(src->members);
 223
 224         for (i = 0; i < 2; i++) {
 225                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 226                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 227                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 228                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 229         }
 230
 231         dst->usr_time           = le64_to_cpu(src->usr_time);
 232         dst->sys_time           = le64_to_cpu(src->sys_time);
 233         dst->ctx                = le64_to_cpu(src->ctx);
 234         dst->minf               = le64_to_cpu(src->minf);
 235         dst->majf               = le64_to_cpu(src->majf);
 236         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 237         dst->percentile_list    = NULL;
 238
 239         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 240                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 241                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 242                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 243         }
 244
 245         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 246                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 247                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 248         }
 249
 250         for (i = 0; i < 2; i++)
 251                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 252                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 253
 254         for (i = 0; i < 3; i++) {
 255                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 256                 dst->short_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 257         }
 258
 259         dst->total_submit       = le64_to_cpu(src->total_submit);
 260         dst->total_complete     = le64_to_cpu(src->total_complete);
 261
 262         for (i = 0; i < 2; i++) {
 263                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 264                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 265         }
 266
 267         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 268         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 269         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 270         dst->first_error        = le32_to_cpu(src->first_error);
 271         dst->kb_base            = le32_to_cpu(src->kb_base);
 272 }
 273
 274 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 275 {
 276         int i;
 277
 278         for (i = 0; i < 2; i++) {
 279                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 280                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 281                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 282                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 283                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 284                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 285         }
 286
 287         dst->kb_base    = le32_to_cpu(src->kb_base);
 288         dst->groupid    = le32_to_cpu(src->groupid);
 289 }
 290
 291 static void handle_ts(struct fio_net_cmd *cmd)
 292 {
 293         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 294
 295         convert_ts(&p->ts, &p->ts);
 296         convert_gs(&p->rs, &p->rs);
 297
 298         show_thread_status(&p->ts, &p->rs);
 299 }
 300
 301 static void handle_gs(struct fio_net_cmd *cmd)
 302 {
 303         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 304
 305         convert_gs(gs, gs);
 306         show_group_stats(gs);
 307 }
 308
 309 static int handle_client(struct fio_client *client)
 310 {
 311         struct fio_net_cmd *cmd;
 312         int done = 0;
 313
 314         while ((cmd = fio_net_recv_cmd(client->fd)) != NULL) {
 315                 dprint(FD_NET, "%s: got cmd op %d\n", client->hostname,
 316                                                         cmd->opcode);
 317
 318                 switch (cmd->opcode) {
 319                 case FIO_NET_CMD_ACK:
 320                         free(cmd);
 321                         break;
 322                 case FIO_NET_CMD_QUIT:
 323                         remove_client(client);
 324                         free(cmd);
 325                         done = 1;
 326                         break;
 327                 case FIO_NET_CMD_TEXT:
 328                         fwrite(cmd->payload, cmd->pdu_len, 1, stdout);
 329                         fflush(stdout);
 330                         free(cmd);
 331                         break;
 332                 case FIO_NET_CMD_TS:
 333                         handle_ts(cmd);
 334                         free(cmd);
 335                         break;
 336                 case FIO_NET_CMD_GS:
 337                         handle_gs(cmd);
 338                         free(cmd);
 339                         break;
 340                 default:
 341                         log_err("fio: unknown client op: %d\n", cmd->opcode);
 342                         free(cmd);
 343                         break;
 344                 }
 345
 346                 if (done)
 347                         break;
 348         }
 349
 350         return 0;
 351 }
 352
 353 int fio_handle_clients(void)
 354 {
 355         struct fio_client *client;
 356         struct flist_head *entry;
 357         struct pollfd *pfds;
 358         int i, ret = 0;
 359
 360         pfds = malloc(nr_clients * sizeof(struct pollfd));
 361
 362         while (!exit_backend && nr_clients) {
 363                 i = 0;
 364                 flist_for_each(entry, &client_list) {
 365                         client = flist_entry(entry, struct fio_client, list);
 366
 367                         pfds[i].fd = client->fd;
 368                         pfds[i].events = POLLIN;
 369                         i++;
 370                 }
 371
 372                 assert(i == nr_clients);
 373
 374                 ret = poll(pfds, nr_clients, 100);
 375                 if (ret < 0) {
 376                         if (errno == EINTR)
 377                                 continue;
 378                         log_err("fio: poll clients: %s\n", strerror(errno));
 379                         break;
 380                 } else if (!ret)
 381                         continue;
 382
 383                 for (i = 0; i < nr_clients; i++) {
 384                         if (!(pfds[i].revents & POLLIN))
 385                                 continue;
 386
 387                         client = find_client_by_fd(pfds[i].fd);
 388                         if (!client) {
 389                                 log_err("fio: unknown client\n");
 390                                 continue;
 391                         }
 392                         handle_client(client);
 393                 }
 394         }
 395
 396         free(pfds);
 397         return 0;
 398 }