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         spin_unlock(&cli->cl_loi_list_lock);
 141
 142         return count;
 143 }
 144
 145 int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off, int count,
 146                            int *eof, void *data)
 147 {
 148         struct obd_device *dev = data;
 149         struct client_obd *cli = &dev->u.cli;
 150         int rc;
 151
 152         spin_lock(&cli->cl_loi_list_lock);
 153         rc = snprintf(page, count, LPU64"\n", cli->cl_dirty);
 154         spin_unlock(&cli->cl_loi_list_lock);
 155         return rc;
 156 }
 157
 158 int osc_rd_create_low_wm(char *page, char **start, off_t off, int count,
 159                          int *eof, void *data)
 160 {
 161         struct obd_device *obd = data;
 162         struct obd_export *exp;
 163
 164         if (obd == NULL || list_empty(&obd->obd_exports))
 165                 return 0;
 166
 167         spin_lock(&obd->obd_dev_lock);
 168         exp = list_entry(obd->obd_exports.next, struct obd_export,
 169                          exp_obd_chain);
 170         spin_unlock(&obd->obd_dev_lock);
 171
 172         return snprintf(page, count, "%d\n",
 173                         exp->exp_osc_data.oed_oscc.oscc_kick_barrier);
 174 }
 175
 176 int osc_wr_create_low_wm(struct file *file, const char *buffer,
 177                          unsigned long count, void *data)
 178 {
 179         struct obd_device *obd = data;
 180         struct obd_export *exp;
 181         int val, rc;
 182
 183         if (obd == NULL || list_empty(&obd->obd_exports))
 184                 return 0;
 185
 186         rc = lprocfs_write_helper(buffer, count, &val);
 187         if (rc)
 188                 return rc;
 189
 190         if (val < 0)
 191                 return -ERANGE;
 192
 193         spin_lock(&obd->obd_dev_lock);
 194         exp = list_entry(obd->obd_exports.next, struct obd_export,
 195                          exp_obd_chain);
 196         exp->exp_osc_data.oed_oscc.oscc_kick_barrier = val;
 197         spin_unlock(&obd->obd_dev_lock);
 198
 199         return count;
 200 }
 201
 202 int osc_rd_create_count(char *page, char **start, off_t off, int count,
 203                         int *eof, void *data)
 204 {
 205         struct obd_device *obd = data;
 206         struct obd_export *exp;
 207
 208         if (obd == NULL || list_empty(&obd->obd_exports))
 209                 return 0;
 210
 211         spin_lock(&obd->obd_dev_lock);
 212         exp = list_entry(obd->obd_exports.next, struct obd_export,
 213                          exp_obd_chain);
 214         spin_unlock(&obd->obd_dev_lock);
 215
 216         return snprintf(page, count, "%d\n",
 217                         exp->exp_osc_data.oed_oscc.oscc_grow_count);
 218 }
 219
 220 int osc_wr_create_count(struct file *file, const char *buffer,
 221                         unsigned long count, void *data)
 222 {
 223         struct obd_device *obd = data;
 224         struct obd_export *exp;
 225         int val, rc;
 226
 227         if (obd == NULL || list_empty(&obd->obd_exports))
 228                 return 0;
 229
 230         rc = lprocfs_write_helper(buffer, count, &val);
 231         if (rc)
 232                 return rc;
 233
 234         if (val < 0)
 235                 return -ERANGE;
 236
 237         spin_lock(&obd->obd_dev_lock);
 238         exp = list_entry(obd->obd_exports.next, struct obd_export,
 239                          exp_obd_chain);
 240         exp->exp_osc_data.oed_oscc.oscc_grow_count = val;
 241         spin_unlock(&obd->obd_dev_lock);
 242
 243         return count;
 244 }
 245
 246 int osc_rd_prealloc_next_id(char *page, char **start, off_t off, int count,
 247                             int *eof, void *data)
 248 {
 249         struct obd_device *obd = data;
 250         struct obd_export *exp;
 251
 252         if (obd == NULL || list_empty(&obd->obd_exports))
 253                 return 0;
 254
 255         spin_lock(&obd->obd_dev_lock);
 256         exp = list_entry(obd->obd_exports.next, struct obd_export,
 257                          exp_obd_chain);
 258         spin_unlock(&obd->obd_dev_lock);
 259
 260         return snprintf(page, count, LPU64"\n",
 261                         exp->exp_osc_data.oed_oscc.oscc_next_id);
 262 }
 263
 264 int osc_rd_prealloc_last_id(char *page, char **start, off_t off, int count,
 265                             int *eof, void *data)
 266 {
 267         struct obd_device *obd = data;
 268         struct obd_export *exp;
 269
 270         if (obd == NULL || list_empty(&obd->obd_exports))
 271                 return 0;
 272
 273         spin_lock(&obd->obd_dev_lock);
 274         exp = list_entry(obd->obd_exports.next, struct obd_export,
 275                          exp_obd_chain);
 276         spin_unlock(&obd->obd_dev_lock);
 277
 278         return snprintf(page, count, LPU64"\n",
 279                         exp->exp_osc_data.oed_oscc.oscc_last_id);
 280 }
 281
 282 static struct lprocfs_vars lprocfs_obd_vars[] = {
 283         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 284         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 285         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 286         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 287         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 288         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 289         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 290         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 291         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 292         { "max_pages_per_rpc", osc_rd_max_pages_per_rpc,
 293                                osc_wr_max_pages_per_rpc, 0 },
 294         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 295                                 osc_wr_max_rpcs_in_flight, 0 },
 296         { "max_dirty_mb", osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 297         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 298         {"create_low_watermark", osc_rd_create_low_wm, osc_wr_create_low_wm, 0},
 299         { "create_count", osc_rd_create_count, osc_wr_create_count, 0 },
 300         { "prealloc_next_id", osc_rd_prealloc_next_id, 0, 0 },
 301         { "prealloc_last_id", osc_rd_prealloc_last_id, 0, 0 },
 302         { 0 }
 303 };
 304
 305 static struct lprocfs_vars lprocfs_module_vars[] = {
 306         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 307         { 0 }
 308 };
 309
 310 #define pct(a,b) (b ? a * 100 / b : 0)
 311
 312 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 313 {
 314         struct timeval now;
 315         struct obd_device *dev = seq->private;
 316         struct client_obd *cli = &dev->u.cli;
 317         unsigned long flags;
 318         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 319         int i, rpcs, r, w;
 320
 321         do_gettimeofday(&now);
 322
 323         spin_lock_irqsave(&cli->cl_loi_list_lock, flags);
 324
 325         rpcs = cli->cl_brw_in_flight;
 326         r = cli->cl_pending_r_pages;
 327         w = cli->cl_pending_w_pages;
 328
 329         seq_printf(seq, "snapshot_time:         %lu:%lu (secs:usecs)\n",
 330                    now.tv_sec, now.tv_usec);
 331         seq_printf(seq, "RPCs in flight:        %d\n", rpcs);
 332         seq_printf(seq, "pending write pages:   %d\n", w);
 333         seq_printf(seq, "pending read pages:   %d\n", r);
 334
 335         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 336         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 337         seq_printf(seq, "       rpcs   %% cum %%\n");
 338
 339         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 340         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 341
 342         read_cum = 0;
 343         write_cum = 0;
 344         for (i = 0; i < OBD_HIST_MAX; i++) {
 345                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 346                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 347                 read_cum += r;
 348                 write_cum += w;
 349                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 350                                  1 << i, r, pct(r, read_tot),
 351                                  pct(read_cum, read_tot), w,
 352                                  pct(w, write_tot),
 353                                  pct(write_cum, write_tot));
 354                 if (read_cum == read_tot && write_cum == write_tot)
 355                         break;
 356         }
 357
 358         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 359         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 360         seq_printf(seq, "       rpcs   %% cum %%\n");
 361
 362         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 363         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 364
 365         read_cum = 0;
 366         write_cum = 0;
 367         for (i = 0; i < OBD_HIST_MAX; i++) {
 368                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 369                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 370                 read_cum += r;
 371                 write_cum += w;
 372                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 373                                  i, r, pct(r, read_tot),
 374                                  pct(read_cum, read_tot), w,
 375                                  pct(w, write_tot),
 376                                  pct(write_cum, write_tot));
 377                 if (read_cum == read_tot && write_cum == write_tot)
 378                         break;
 379         }
 380
 381         spin_unlock_irqrestore(&cli->cl_loi_list_lock, flags);
 382
 383         return 0;
 384 }
 385 #undef pct
 386
 387 static void *osc_rpc_stats_seq_start(struct seq_file *p, loff_t *pos)
 388 {
 389         if (*pos == 0)
 390                 return (void *)1;
 391         return NULL;
 392 }
 393 static void *osc_rpc_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 394 {
 395         ++*pos;
 396         return NULL;
 397 }
 398 static void osc_rpc_stats_seq_stop(struct seq_file *p, void *v)
 399 {
 400 }
 401 struct seq_operations osc_rpc_stats_seq_sops = {
 402         .start = osc_rpc_stats_seq_start,
 403         .stop = osc_rpc_stats_seq_stop,
 404         .next = osc_rpc_stats_seq_next,
 405         .show = osc_rpc_stats_seq_show,
 406 };
 407
 408 static int osc_rpc_stats_seq_open(struct inode *inode, struct file *file)
 409 {
 410         struct proc_dir_entry *dp = inode->u.generic_ip;
 411         struct seq_file *seq;
 412         int rc;
 413
 414         rc = seq_open(file, &osc_rpc_stats_seq_sops);
 415         if (rc)
 416                 return rc;
 417         seq = file->private_data;
 418         seq->private = dp->data;
 419         return 0;
 420 }
 421
 422 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 423                                        size_t len, loff_t *off)
 424 {
 425         struct seq_file *seq = file->private_data;
 426         struct obd_device *dev = seq->private;
 427         struct client_obd *cli = &dev->u.cli;
 428
 429         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 430         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 431         lprocfs_oh_clear(&cli->cl_read_page_hist);
 432         lprocfs_oh_clear(&cli->cl_write_page_hist);
 433
 434         return len;
 435 }
 436
 437 struct file_operations osc_rpc_stats_fops = {
 438         .open    = osc_rpc_stats_seq_open,
 439         .read    = seq_read,
 440         .write   = osc_rpc_stats_seq_write,
 441         .llseek  = seq_lseek,
 442         .release = seq_release,
 443 };
 444
 445 int lproc_osc_attach_seqstat(struct obd_device *dev)
 446 {
 447         return lprocfs_obd_seq_create(dev, "rpc_stats", 0444,
 448                                       &osc_rpc_stats_fops, dev);
 449 }
 450
 451
 452 #endif /* LPROCFS */
 453 LPROCFS_INIT_VARS(osc,lprocfs_module_vars, lprocfs_obd_vars)