lustre/obdfilter/lproc_obdfilter.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 #include <linux/lprocfs_status.h>
  26 #include <linux/obd.h>
  27 #include <linux/seq_file.h>
  28 #include <linux/version.h>
  29
  30 #include "filter_internal.h"
  31
  32 #ifndef LPROCFS
  33 static struct lprocfs_vars lprocfs_obd_vars[]  = { {0} };
  34 static struct lprocfs_vars lprocfs_module_vars[] = { {0} };
  35 #else
  36
  37 static int lprocfs_filter_rd_groups(char *page, char **start, off_t off,
  38                                     int count, int *eof, void *data)
  39 {
  40         struct obd_device *obd = (struct obd_device *)data;
  41
  42         *eof = 1;
  43         return snprintf(page, count, "%u\n", obd->u.filter.fo_group_count);
  44 }
  45
  46 static int lprocfs_filter_rd_tot_dirty(char *page, char **start, off_t off,
  47                                        int count, int *eof, void *data)
  48 {
  49         struct obd_device *obd = (struct obd_device *)data;
  50
  51         LASSERT(obd != NULL);
  52         *eof = 1;
  53         return snprintf(page, count, LPU64"\n", obd->u.filter.fo_tot_dirty);
  54 }
  55
  56 static int lprocfs_filter_rd_tot_granted(char *page, char **start, off_t off,
  57                                          int count, int *eof, void *data)
  58 {
  59         struct obd_device *obd = (struct obd_device *)data;
  60
  61         LASSERT(obd != NULL);
  62         *eof = 1;
  63         return snprintf(page, count, LPU64"\n", obd->u.filter.fo_tot_granted);
  64 }
  65
  66 static int lprocfs_filter_rd_tot_pending(char *page, char **start, off_t off,
  67                                          int count, int *eof, void *data)
  68 {
  69         struct obd_device *obd = (struct obd_device *)data;
  70
  71         LASSERT(obd != NULL);
  72         *eof = 1;
  73         return snprintf(page, count, LPU64"\n", obd->u.filter.fo_tot_pending);
  74 }
  75
  76 static int lprocfs_filter_rd_mntdev(char *page, char **start, off_t off,
  77                                     int count, int *eof, void *data)
  78 {
  79         struct obd_device *obd = (struct obd_device *)data;
  80
  81         LASSERT(obd != NULL);
  82         LASSERT(obd->u.filter.fo_vfsmnt->mnt_devname);
  83         *eof = 1;
  84         return snprintf(page, count, "%s\n",
  85                         obd->u.filter.fo_vfsmnt->mnt_devname);
  86 }
  87
  88 static int lprocfs_filter_rd_last_id(char *page, char **start, off_t off,
  89                                      int count, int *eof, void *data)
  90 {
  91         struct obd_device *obd = data;
  92         struct filter_obd *filter = &obd->u.filter;
  93         int retval = 0, rc, i;
  94
  95         if (obd == NULL)
  96                 return 0;
  97
  98         for (i = 1; i < filter->fo_group_count; i++) {
  99                 rc = snprintf(page, count, LPU64"\n",filter_last_id(filter, i));
 100                 if (rc < 0) {
 101                         retval = rc;
 102                         break;
 103                 }
 104                 page += rc;
 105                 count -= rc;
 106                 retval += rc;
 107         }
 108         return retval;
 109 }
 110
 111 int lprocfs_filter_rd_readcache(char *page, char **start, off_t off, int count,
 112                                 int *eof, void *data)
 113 {
 114         struct obd_device *obd = data;
 115         int rc;
 116
 117         rc = snprintf(page, count, LPU64"\n",
 118                       obd->u.filter.fo_readcache_max_filesize);
 119         return rc;
 120 }
 121
 122 int lprocfs_filter_wr_readcache(struct file *file, const char *buffer,
 123                                 unsigned long count, void *data)
 124 {
 125         struct obd_device *obd = data;
 126         __u64 val;
 127         int rc;
 128
 129         rc = lprocfs_write_u64_helper(buffer, count, &val);
 130         if (rc)
 131                 return rc;
 132
 133         obd->u.filter.fo_readcache_max_filesize = val;
 134         return count;
 135 }
 136
 137 int lprocfs_filter_rd_capa_stat(char *page, char **start, off_t off, int count,
 138                                 int *eof, void *data)
 139 {
 140         struct obd_device *obd = data;
 141         int rc;
 142
 143         rc = snprintf(page, count, "%d\n",
 144                       obd->u.filter.fo_capa_stat);
 145         return rc;
 146 }
 147
 148 int lprocfs_filter_wr_capa_stat(struct file *file, const char *buffer,
 149                                 unsigned long count, void *data)
 150 {
 151         struct obd_device *obd = data;
 152         int val;
 153         int rc;
 154
 155         rc = lprocfs_write_helper(buffer, count, &val);
 156         if (rc)
 157                 return rc;
 158
 159         obd->u.filter.fo_capa_stat = val;
 160         return count;
 161 }
 162
 163 static struct lprocfs_vars lprocfs_obd_vars[] = {
 164         { "uuid",         lprocfs_rd_uuid,          0, 0 },
 165         { "blocksize",    lprocfs_rd_blksize,       0, 0 },
 166         { "kbytestotal",  lprocfs_rd_kbytestotal,   0, 0 },
 167         { "kbytesfree",   lprocfs_rd_kbytesfree,    0, 0 },
 168         { "kbytesavail",  lprocfs_rd_kbytesavail,   0, 0 },
 169         { "filestotal",   lprocfs_rd_filestotal,    0, 0 },
 170         { "filesfree",    lprocfs_rd_filesfree,     0, 0 },
 171         { "filegroups",   lprocfs_filter_rd_groups, 0, 0 },
 172         { "fstype",       lprocfs_rd_fstype,        0, 0 },
 173         { "mntdev",       lprocfs_filter_rd_mntdev, 0, 0 },
 174         { "last_id",      lprocfs_filter_rd_last_id,0, 0 },
 175         { "tot_dirty",    lprocfs_filter_rd_tot_dirty,   0, 0 },
 176         { "tot_pending",  lprocfs_filter_rd_tot_pending, 0, 0 },
 177         { "tot_granted",  lprocfs_filter_rd_tot_granted, 0, 0 },
 178         { "num_exports",  lprocfs_rd_num_exports,   0, 0 },
 179         { "readcache_max_filesize",
 180                           lprocfs_filter_rd_readcache,
 181                           lprocfs_filter_wr_readcache, 0 },
 182         { "recovery_status", lprocfs_obd_rd_recovery_status, 0, 0 },
 183         { "capa",         lprocfs_filter_rd_capa_stat,
 184                           lprocfs_filter_wr_capa_stat, 0 },
 185         { 0 }
 186 };
 187
 188 static struct lprocfs_vars lprocfs_module_vars[] = {
 189         { "num_refs",     lprocfs_rd_numrefs,       0, 0 },
 190         { 0 }
 191 };
 192
 193 void filter_tally_write(struct filter_obd *filter, struct page **pages,
 194                      int nr_pages, unsigned long *blocks, int blocks_per_page)
 195 {
 196         struct page *last_page = NULL;
 197         unsigned long *last_block = NULL;
 198         unsigned long discont_pages = 0;
 199         unsigned long discont_blocks = 0;
 200         int i;
 201
 202         if (nr_pages == 0)
 203                 return;
 204
 205         lprocfs_oh_tally_log2(&filter->fo_w_pages, nr_pages);
 206
 207         while (nr_pages-- > 0) {
 208                 if (last_page && (*pages)->index != (last_page->index + 1))
 209                         discont_pages++;
 210                 last_page = *pages;
 211                 pages++;
 212                 for (i = 0; i < blocks_per_page; i++) {
 213                         if (last_block && *blocks != (*last_block + 1))
 214                                 discont_blocks++;
 215                         last_block = blocks++;
 216                 }
 217         }
 218
 219         lprocfs_oh_tally(&filter->fo_w_discont_pages, discont_pages);
 220         lprocfs_oh_tally(&filter->fo_w_discont_blocks, discont_blocks);
 221 }
 222
 223 void filter_tally_read(struct filter_obd *filter, struct niobuf_local *lnb,
 224                        int niocount)
 225 {
 226         struct niobuf_local *end;
 227         struct page *last_page = NULL;
 228         unsigned long discont_pages = 0;
 229         unsigned long discont_blocks = 0;
 230
 231         if (niocount == 0)
 232                 return;
 233
 234         for (end = lnb + niocount; lnb < end && lnb->page; lnb++) {
 235                 struct page *page = lnb->page;
 236                 if (last_page) {
 237                        if (page->index != (last_page->index + 1))
 238                                 discont_pages++;
 239                         /* XXX not so smart for now */
 240 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 241                         if ((page->buffers && last_page->buffers) &&
 242                             (page->buffers->b_blocknr !=
 243                              (last_page->buffers->b_blocknr + 1)))
 244                                 discont_blocks++;
 245 #else
 246 #warning "port on 2.6 -bzzz"
 247 #endif
 248                 }
 249                 last_page = page;
 250         }
 251
 252         lprocfs_oh_tally_log2(&filter->fo_r_pages, niocount);
 253         lprocfs_oh_tally(&filter->fo_r_discont_pages, discont_pages);
 254         lprocfs_oh_tally(&filter->fo_r_discont_blocks, discont_blocks);
 255 }
 256
 257 #define pct(a,b) (b ? a * 100 / b : 0)
 258
 259 static int filter_brw_stats_seq_show(struct seq_file *seq, void *v)
 260 {
 261         struct timeval now;
 262         struct obd_device *dev = seq->private;
 263         struct filter_obd *filter = &dev->u.filter;
 264         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 265         int i;
 266
 267         do_gettimeofday(&now);
 268
 269         /* this sampling races with updates */
 270
 271         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 272                    now.tv_sec, now.tv_usec);
 273
 274         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 275         seq_printf(seq, "pages per brw         brws   %% cum %% |");
 276         seq_printf(seq, "       rpcs   %% cum %%\n");
 277
 278         read_tot = lprocfs_oh_sum(&filter->fo_r_pages);
 279         write_tot = lprocfs_oh_sum(&filter->fo_w_pages);
 280
 281         read_cum = 0;
 282         write_cum = 0;
 283         for (i = 0; i < OBD_HIST_MAX; i++) {
 284                 unsigned long r = filter->fo_r_pages.oh_buckets[i];
 285                 unsigned long w = filter->fo_w_pages.oh_buckets[i];
 286                 read_cum += r;
 287                 write_cum += w;
 288                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 289                                  1 << i, r, pct(r, read_tot),
 290                                  pct(read_cum, read_tot), w,
 291                                  pct(w, write_tot),
 292                                  pct(write_cum, write_tot));
 293                 if (read_cum == read_tot && write_cum == write_tot)
 294                         break;
 295         }
 296
 297         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 298         seq_printf(seq, "discont pages        rpcs   %% cum %% |");
 299         seq_printf(seq, "       rpcs   %% cum %%\n");
 300
 301         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_pages);
 302         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_pages);
 303
 304         read_cum = 0;
 305         write_cum = 0;
 306
 307         for (i = 0; i < OBD_HIST_MAX; i++) {
 308                 unsigned long r = filter->fo_r_discont_pages.oh_buckets[i];
 309                 unsigned long w = filter->fo_w_discont_pages.oh_buckets[i];
 310                 read_cum += r;
 311                 write_cum += w;
 312                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 313                                  i, r, pct(r, read_tot),
 314                                  pct(read_cum, read_tot), w,
 315                                  pct(w, write_tot),
 316                                  pct(write_cum, write_tot));
 317                 if (read_cum == read_tot && write_cum == write_tot)
 318                         break;
 319         }
 320
 321         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 322         seq_printf(seq, "discont blocks        rpcs   %% cum %% |");
 323         seq_printf(seq, "       rpcs   %% cum %%\n");
 324
 325         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_blocks);
 326         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_blocks);
 327
 328         read_cum = 0;
 329         write_cum = 0;
 330         for (i = 0; i < OBD_HIST_MAX; i++) {
 331                 unsigned long r = filter->fo_r_discont_blocks.oh_buckets[i];
 332                 unsigned long w = filter->fo_w_discont_blocks.oh_buckets[i];
 333                 read_cum += r;
 334                 write_cum += w;
 335                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 336                                  i, r, pct(r, read_tot),
 337                                  pct(read_cum, read_tot), w,
 338                                  pct(w, write_tot),
 339                                  pct(write_cum, write_tot));
 340                 if (read_cum == read_tot && write_cum == write_tot)
 341                         break;
 342         }
 343
 344         return 0;
 345 }
 346 #undef pct
 347
 348 static void *filter_brw_stats_seq_start(struct seq_file *p, loff_t *pos)
 349 {
 350         if (*pos == 0)
 351                 return (void *)1;
 352         return NULL;
 353 }
 354 static void *filter_brw_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 355 {
 356         ++*pos;
 357         return NULL;
 358 }
 359 static void filter_brw_stats_seq_stop(struct seq_file *p, void *v)
 360 {
 361 }
 362 struct seq_operations filter_brw_stats_seq_sops = {
 363         .start = filter_brw_stats_seq_start,
 364         .stop = filter_brw_stats_seq_stop,
 365         .next = filter_brw_stats_seq_next,
 366         .show = filter_brw_stats_seq_show,
 367 };
 368
 369 static int filter_brw_stats_seq_open(struct inode *inode, struct file *file)
 370 {
 371         struct proc_dir_entry *dp = PDE(inode);
 372         struct seq_file *seq;
 373         int rc;
 374
 375         rc = seq_open(file, &filter_brw_stats_seq_sops);
 376         if (rc)
 377                 return rc;
 378         seq = file->private_data;
 379         seq->private = dp->data;
 380         return 0;
 381 }
 382
 383 static ssize_t filter_brw_stats_seq_write(struct file *file, const char *buf,
 384                                        size_t len, loff_t *off)
 385 {
 386         struct seq_file *seq = file->private_data;
 387         struct obd_device *dev = seq->private;
 388         struct filter_obd *filter = &dev->u.filter;
 389
 390         lprocfs_oh_clear(&filter->fo_r_pages);
 391         lprocfs_oh_clear(&filter->fo_w_pages);
 392         lprocfs_oh_clear(&filter->fo_r_discont_pages);
 393         lprocfs_oh_clear(&filter->fo_w_discont_pages);
 394         lprocfs_oh_clear(&filter->fo_r_discont_blocks);
 395         lprocfs_oh_clear(&filter->fo_w_discont_blocks);
 396
 397         return len;
 398 }
 399
 400 struct file_operations filter_brw_stats_fops = {
 401         .owner   = THIS_MODULE,
 402         .open    = filter_brw_stats_seq_open,
 403         .read    = seq_read,
 404         .write   = filter_brw_stats_seq_write,
 405         .llseek  = seq_lseek,
 406         .release = seq_release,
 407 };
 408
 409 int lproc_filter_attach_seqstat(struct obd_device *dev)
 410 {
 411         return lprocfs_obd_seq_create(dev, "brw_stats", 0444,
 412                                       &filter_brw_stats_fops, dev);
 413 }
 414
 415
 416
 417 #endif /* LPROCFS */
 418 LPROCFS_INIT_VARS(filter, lprocfs_module_vars, lprocfs_obd_vars)