lustre/osc/lproc_osc.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22 #define DEBUG_SUBSYSTEM S_CLASS
  23
  24 #include <linux/version.h>
  25 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  26 #include <asm/statfs.h>
  27 #endif
  28 #include <linux/obd_class.h>
  29 #include <linux/lprocfs_status.h>
  30 #include <linux/seq_file.h>
  31 #include "osc_internal.h"
  32
  33 #ifndef LPROCFS
  34 static struct lprocfs_vars lprocfs_obd_vars[]  = { {0} };
  35 static struct lprocfs_vars lprocfs_module_vars[] = { {0} };
  36 #else
  37
  38 #define OSC_MAX_RIF_MAX 32
  39 #define OSC_MAX_DIRTY_MB_MAX 4096 /* totally arbitrary */
  40
  41 int osc_rd_max_pages_per_rpc(char *page, char **start, off_t off, int count,
  42                              int *eof, void *data)
  43 {
  44         struct obd_device *dev = data;
  45         struct client_obd *cli = &dev->u.cli;
  46         int rc;
  47
  48         spin_lock(&cli->cl_loi_list_lock);
  49         rc = snprintf(page, count, "%d\n", cli->cl_max_pages_per_rpc);
  50         spin_unlock(&cli->cl_loi_list_lock);
  51         return rc;
  52 }
  53
  54 int osc_wr_max_pages_per_rpc(struct file *file, const char *buffer,
  55                              unsigned long count, void *data)
  56 {
  57         struct obd_device *dev = data;
  58         struct client_obd *cli = &dev->u.cli;
  59         int val, rc;
  60
  61         rc = lprocfs_write_helper(buffer, count, &val);
  62         if (rc)
  63                 return rc;
  64
  65         if (val < 1 || val > PTL_MD_MAX_PAGES)
  66                 return -ERANGE;
  67
  68         spin_lock(&cli->cl_loi_list_lock);
  69         cli->cl_max_pages_per_rpc = val;
  70         spin_unlock(&cli->cl_loi_list_lock);
  71
  72         return count;
  73 }
  74
  75 int osc_rd_max_rpcs_in_flight(char *page, char **start, off_t off, int count,
  76                               int *eof, void *data)
  77 {
  78         struct obd_device *dev = data;
  79         struct client_obd *cli = &dev->u.cli;
  80         int rc;
  81
  82         spin_lock(&cli->cl_loi_list_lock);
  83         rc = snprintf(page, count, "%d\n", cli->cl_max_rpcs_in_flight);
  84         spin_unlock(&cli->cl_loi_list_lock);
  85         return rc;
  86 }
  87
  88 int osc_wr_max_rpcs_in_flight(struct file *file, const char *buffer,
  89                               unsigned long count, void *data)
  90 {
  91         struct obd_device *dev = data;
  92         struct client_obd *cli = &dev->u.cli;
  93         int val, rc;
  94
  95         rc = lprocfs_write_helper(buffer, count, &val);
  96         if (rc)
  97                 return rc;
  98
  99         if (val < 1 || val > OSC_MAX_RIF_MAX)
 100                 return -ERANGE;
 101
 102         spin_lock(&cli->cl_loi_list_lock);
 103         cli->cl_max_rpcs_in_flight = val;
 104         spin_unlock(&cli->cl_loi_list_lock);
 105
 106         return count;
 107 }
 108
 109 int osc_rd_max_dirty_mb(char *page, char **start, off_t off, int count,
 110                         int *eof, void *data)
 111 {
 112         struct obd_device *dev = data;
 113         struct client_obd *cli = &dev->u.cli;
 114         int val;
 115         int rc;
 116
 117         spin_lock(&cli->cl_loi_list_lock);
 118         val = cli->cl_dirty_max >> 20;
 119         rc = snprintf(page, count, "%d\n", val);
 120         spin_unlock(&cli->cl_loi_list_lock);
 121         return rc;
 122 }
 123
 124 int osc_wr_max_dirty_mb(struct file *file, const char *buffer,
 125                         unsigned long count, void *data)
 126 {
 127         struct obd_device *dev = data;
 128         struct client_obd *cli = &dev->u.cli;
 129         int val, rc;
 130
 131         rc = lprocfs_write_helper(buffer, count, &val);
 132         if (rc)
 133                 return rc;
 134
 135         if (val < 0 || val > OSC_MAX_DIRTY_MB_MAX)
 136                 return -ERANGE;
 137
 138         spin_lock(&cli->cl_loi_list_lock);
 139         cli->cl_dirty_max = (obd_count)val * 1024 * 1024;
 140         osc_adjust_cache(cli);
 141         spin_unlock(&cli->cl_loi_list_lock);
 142
 143         return count;
 144 }
 145
 146 int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off, int count,
 147                            int *eof, void *data)
 148 {
 149         struct obd_device *dev = data;
 150         struct client_obd *cli = &dev->u.cli;
 151         int rc;
 152
 153         spin_lock(&cli->cl_loi_list_lock);
 154         rc = snprintf(page, count, LPU64"\n", cli->cl_dirty);
 155         spin_unlock(&cli->cl_loi_list_lock);
 156         return rc;
 157 }
 158
 159 int osc_rd_create_low_wm(char *page, char **start, off_t off, int count,
 160                          int *eof, void *data)
 161 {
 162         struct obd_device *obd = data;
 163         struct obd_export *exp;
 164
 165         if (obd == NULL || list_empty(&obd->obd_exports))
 166                 return 0;
 167
 168         spin_lock(&obd->obd_dev_lock);
 169         exp = list_entry(obd->obd_exports.next, struct obd_export,
 170                          exp_obd_chain);
 171         spin_unlock(&obd->obd_dev_lock);
 172
 173         return snprintf(page, count, "%d\n",
 174                         exp->exp_osc_data.oed_oscc.oscc_kick_barrier);
 175 }
 176
 177 int osc_wr_create_low_wm(struct file *file, const char *buffer,
 178                          unsigned long count, void *data)
 179 {
 180         struct obd_device *obd = data;
 181         struct obd_export *exp;
 182         int val, rc;
 183
 184         if (obd == NULL || list_empty(&obd->obd_exports))
 185                 return 0;
 186
 187         rc = lprocfs_write_helper(buffer, count, &val);
 188         if (rc)
 189                 return rc;
 190
 191         if (val < 0)
 192                 return -ERANGE;
 193
 194         spin_lock(&obd->obd_dev_lock);
 195         exp = list_entry(obd->obd_exports.next, struct obd_export,
 196                          exp_obd_chain);
 197         exp->exp_osc_data.oed_oscc.oscc_kick_barrier = val;
 198         spin_unlock(&obd->obd_dev_lock);
 199
 200         return count;
 201 }
 202
 203 int osc_rd_create_count(char *page, char **start, off_t off, int count,
 204                         int *eof, void *data)
 205 {
 206         struct obd_device *obd = data;
 207         struct obd_export *exp;
 208
 209         if (obd == NULL || list_empty(&obd->obd_exports))
 210                 return 0;
 211
 212         spin_lock(&obd->obd_dev_lock);
 213         exp = list_entry(obd->obd_exports.next, struct obd_export,
 214                          exp_obd_chain);
 215         spin_unlock(&obd->obd_dev_lock);
 216
 217         return snprintf(page, count, "%d\n",
 218                         exp->exp_osc_data.oed_oscc.oscc_grow_count);
 219 }
 220
 221 int osc_wr_create_count(struct file *file, const char *buffer,
 222                         unsigned long count, void *data)
 223 {
 224         struct obd_device *obd = data;
 225         struct obd_export *exp;
 226         int val, rc;
 227
 228         if (obd == NULL || list_empty(&obd->obd_exports))
 229                 return 0;
 230
 231         rc = lprocfs_write_helper(buffer, count, &val);
 232         if (rc)
 233                 return rc;
 234
 235         if (val < 0)
 236                 return -ERANGE;
 237
 238         spin_lock(&obd->obd_dev_lock);
 239         exp = list_entry(obd->obd_exports.next, struct obd_export,
 240                          exp_obd_chain);
 241         exp->exp_osc_data.oed_oscc.oscc_grow_count = val;
 242         spin_unlock(&obd->obd_dev_lock);
 243
 244         return count;
 245 }
 246
 247 int osc_rd_prealloc_next_id(char *page, char **start, off_t off, int count,
 248                             int *eof, void *data)
 249 {
 250         struct obd_device *obd = data;
 251         struct obd_export *exp;
 252
 253         if (obd == NULL || list_empty(&obd->obd_exports))
 254                 return 0;
 255
 256         spin_lock(&obd->obd_dev_lock);
 257         exp = list_entry(obd->obd_exports.next, struct obd_export,
 258                          exp_obd_chain);
 259         spin_unlock(&obd->obd_dev_lock);
 260
 261         return snprintf(page, count, LPU64"\n",
 262                         exp->exp_osc_data.oed_oscc.oscc_next_id);
 263 }
 264
 265 int osc_rd_prealloc_last_id(char *page, char **start, off_t off, int count,
 266                             int *eof, void *data)
 267 {
 268         struct obd_device *obd = data;
 269         struct obd_export *exp;
 270
 271         if (obd == NULL || list_empty(&obd->obd_exports))
 272                 return 0;
 273
 274         spin_lock(&obd->obd_dev_lock);
 275         exp = list_entry(obd->obd_exports.next, struct obd_export,
 276                          exp_obd_chain);
 277         spin_unlock(&obd->obd_dev_lock);
 278
 279         return snprintf(page, count, LPU64"\n",
 280                         exp->exp_osc_data.oed_oscc.oscc_last_id);
 281 }
 282
 283 static struct lprocfs_vars lprocfs_obd_vars[] = {
 284         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 285         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 286         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 287         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 288         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 289         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 290         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 291         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 292         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 293         { "max_pages_per_rpc", osc_rd_max_pages_per_rpc,
 294                                osc_wr_max_pages_per_rpc, 0 },
 295         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 296                                 osc_wr_max_rpcs_in_flight, 0 },
 297         { "max_dirty_mb", osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 298         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 299         {"create_low_watermark", osc_rd_create_low_wm, osc_wr_create_low_wm, 0},
 300         { "create_count", osc_rd_create_count, osc_wr_create_count, 0 },
 301         { "prealloc_next_id", osc_rd_prealloc_next_id, 0, 0 },
 302         { "prealloc_last_id", osc_rd_prealloc_last_id, 0, 0 },
 303         { 0 }
 304 };
 305
 306 static struct lprocfs_vars lprocfs_module_vars[] = {
 307         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 308         { 0 }
 309 };
 310
 311 #define pct(a,b) (b ? a * 100 / b : 0)
 312
 313 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 314 {
 315         struct timeval now;
 316         struct obd_device *dev = seq->private;
 317         struct client_obd *cli = &dev->u.cli;
 318         unsigned long flags;
 319         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 320         int i, rpcs, r, w;
 321
 322         do_gettimeofday(&now);
 323
 324         spin_lock_irqsave(&cli->cl_loi_list_lock, flags);
 325
 326         rpcs = cli->cl_brw_in_flight;
 327         r = cli->cl_pending_r_pages;
 328         w = cli->cl_pending_w_pages;
 329
 330         seq_printf(seq, "snapshot_time:         %lu:%lu (secs:usecs)\n",
 331                    now.tv_sec, now.tv_usec);
 332         seq_printf(seq, "RPCs in flight:        %d\n", rpcs);
 333         seq_printf(seq, "pending write pages:   %d\n", w);
 334         seq_printf(seq, "pending read pages:   %d\n", r);
 335
 336         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 337         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 338         seq_printf(seq, "       rpcs   %% cum %%\n");
 339
 340         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 341         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 342
 343         read_cum = 0;
 344         write_cum = 0;
 345         for (i = 0; i < OBD_HIST_MAX; i++) {
 346                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 347                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 348                 read_cum += r;
 349                 write_cum += w;
 350                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 351                                  1 << i, r, pct(r, read_tot),
 352                                  pct(read_cum, read_tot), w,
 353                                  pct(w, write_tot),
 354                                  pct(write_cum, write_tot));
 355                 if (read_cum == read_tot && write_cum == write_tot)
 356                         break;
 357         }
 358
 359         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 360         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 361         seq_printf(seq, "       rpcs   %% cum %%\n");
 362
 363         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 364         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 365
 366         read_cum = 0;
 367         write_cum = 0;
 368         for (i = 0; i < OBD_HIST_MAX; i++) {
 369                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 370                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 371                 read_cum += r;
 372                 write_cum += w;
 373                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 374                                  i, r, pct(r, read_tot),
 375                                  pct(read_cum, read_tot), w,
 376                                  pct(w, write_tot),
 377                                  pct(write_cum, write_tot));
 378                 if (read_cum == read_tot && write_cum == write_tot)
 379                         break;
 380         }
 381
 382         spin_unlock_irqrestore(&cli->cl_loi_list_lock, flags);
 383
 384         return 0;
 385 }
 386 #undef pct
 387
 388 static void *osc_rpc_stats_seq_start(struct seq_file *p, loff_t *pos)
 389 {
 390         if (*pos == 0)
 391                 return (void *)1;
 392         return NULL;
 393 }
 394 static void *osc_rpc_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 395 {
 396         ++*pos;
 397         return NULL;
 398 }
 399 static void osc_rpc_stats_seq_stop(struct seq_file *p, void *v)
 400 {
 401 }
 402 struct seq_operations osc_rpc_stats_seq_sops = {
 403         .start = osc_rpc_stats_seq_start,
 404         .stop = osc_rpc_stats_seq_stop,
 405         .next = osc_rpc_stats_seq_next,
 406         .show = osc_rpc_stats_seq_show,
 407 };
 408
 409 static int osc_rpc_stats_seq_open(struct inode *inode, struct file *file)
 410 {
 411         struct proc_dir_entry *dp = inode->u.generic_ip;
 412         struct seq_file *seq;
 413         int rc;
 414
 415         rc = seq_open(file, &osc_rpc_stats_seq_sops);
 416         if (rc)
 417                 return rc;
 418         seq = file->private_data;
 419         seq->private = dp->data;
 420         return 0;
 421 }
 422
 423 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 424                                        size_t len, loff_t *off)
 425 {
 426         struct seq_file *seq = file->private_data;
 427         struct obd_device *dev = seq->private;
 428         struct client_obd *cli = &dev->u.cli;
 429
 430         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 431         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 432         lprocfs_oh_clear(&cli->cl_read_page_hist);
 433         lprocfs_oh_clear(&cli->cl_write_page_hist);
 434
 435         return len;
 436 }
 437
 438 struct file_operations osc_rpc_stats_fops = {
 439         .open    = osc_rpc_stats_seq_open,
 440         .read    = seq_read,
 441         .write   = osc_rpc_stats_seq_write,
 442         .llseek  = seq_lseek,
 443         .release = seq_release,
 444 };
 445
 446 int lproc_osc_attach_seqstat(struct obd_device *dev)
 447 {
 448         return lprocfs_obd_seq_create(dev, "rpc_stats", 0444,
 449                                       &osc_rpc_stats_fops, dev);
 450 }
 451
 452
 453 #endif /* LPROCFS */
 454 LPROCFS_INIT_VARS(osc,lprocfs_module_vars, lprocfs_obd_vars)