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 static struct lprocfs_vars lprocfs_obd_vars[] = {
 138         { "uuid",         lprocfs_rd_uuid,          0, 0 },
 139         { "blocksize",    lprocfs_rd_blksize,       0, 0 },
 140         { "kbytestotal",  lprocfs_rd_kbytestotal,   0, 0 },
 141         { "kbytesfree",   lprocfs_rd_kbytesfree,    0, 0 },
 142         { "kbytesavail",  lprocfs_rd_kbytesavail,   0, 0 },
 143         { "filestotal",   lprocfs_rd_filestotal,    0, 0 },
 144         { "filesfree",    lprocfs_rd_filesfree,     0, 0 },
 145         { "filegroups",   lprocfs_filter_rd_groups, 0, 0 },
 146         { "fstype",       lprocfs_rd_fstype,        0, 0 },
 147         { "mntdev",       lprocfs_filter_rd_mntdev, 0, 0 },
 148         { "last_id",      lprocfs_filter_rd_last_id,0, 0 },
 149         { "tot_dirty",    lprocfs_filter_rd_tot_dirty,   0, 0 },
 150         { "tot_pending",  lprocfs_filter_rd_tot_pending, 0, 0 },
 151         { "tot_granted",  lprocfs_filter_rd_tot_granted, 0, 0 },
 152         { "num_exports",  lprocfs_rd_num_exports,   0, 0 },
 153         { "readcache_max_filesize",
 154                           lprocfs_filter_rd_readcache,
 155                           lprocfs_filter_wr_readcache, 0 },
 156         { "recovery_status", lprocfs_obd_rd_recovery_status, 0, 0 },
 157         { 0 }
 158 };
 159
 160 static struct lprocfs_vars lprocfs_module_vars[] = {
 161         { "num_refs",     lprocfs_rd_numrefs,       0, 0 },
 162         { 0 }
 163 };
 164
 165 void filter_tally_write(struct filter_obd *filter, struct page **pages,
 166                      int nr_pages, unsigned long *blocks, int blocks_per_page)
 167 {
 168         struct page *last_page = NULL;
 169         unsigned long *last_block = NULL;
 170         unsigned long discont_pages = 0;
 171         unsigned long discont_blocks = 0;
 172         int i;
 173
 174         if (nr_pages == 0)
 175                 return;
 176
 177         lprocfs_oh_tally_log2(&filter->fo_w_pages, nr_pages);
 178
 179         while (nr_pages-- > 0) {
 180                 if (last_page && (*pages)->index != (last_page->index + 1))
 181                         discont_pages++;
 182                 last_page = *pages;
 183                 pages++;
 184                 for (i = 0; i < blocks_per_page; i++) {
 185                         if (last_block && *blocks != (*last_block + 1))
 186                                 discont_blocks++;
 187                         last_block = blocks++;
 188                 }
 189         }
 190
 191         lprocfs_oh_tally(&filter->fo_w_discont_pages, discont_pages);
 192         lprocfs_oh_tally(&filter->fo_w_discont_blocks, discont_blocks);
 193 }
 194
 195 void filter_tally_read(struct filter_obd *filter, struct niobuf_local *lnb,
 196                        int niocount)
 197 {
 198         struct niobuf_local *end;
 199         struct page *last_page = NULL;
 200         unsigned long discont_pages = 0;
 201         unsigned long discont_blocks = 0;
 202
 203         if (niocount == 0)
 204                 return;
 205
 206         for (end = lnb + niocount; lnb < end && lnb->page; lnb++) {
 207                 struct page *page = lnb->page;
 208                 if (last_page) {
 209                        if (page->index != (last_page->index + 1))
 210                                 discont_pages++;
 211                         /* XXX not so smart for now */
 212 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 213                         if ((page->buffers && last_page->buffers) &&
 214                             (page->buffers->b_blocknr !=
 215                              (last_page->buffers->b_blocknr + 1)))
 216                                 discont_blocks++;
 217 #else
 218 #warning "port on 2.6 -bzzz"
 219 #endif
 220                 }
 221                 last_page = page;
 222         }
 223
 224         lprocfs_oh_tally_log2(&filter->fo_r_pages, niocount);
 225         lprocfs_oh_tally(&filter->fo_r_discont_pages, discont_pages);
 226         lprocfs_oh_tally(&filter->fo_r_discont_blocks, discont_blocks);
 227 }
 228
 229 #define pct(a,b) (b ? a * 100 / b : 0)
 230
 231 static int filter_brw_stats_seq_show(struct seq_file *seq, void *v)
 232 {
 233         struct timeval now;
 234         struct obd_device *dev = seq->private;
 235         struct filter_obd *filter = &dev->u.filter;
 236         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 237         int i;
 238
 239         do_gettimeofday(&now);
 240
 241         /* this sampling races with updates */
 242
 243         seq_printf(seq, "snapshot_time:         %lu:%lu (secs:usecs)\n",
 244                    now.tv_sec, now.tv_usec);
 245
 246         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 247         seq_printf(seq, "pages per brw         brws   %% cum %% |");
 248         seq_printf(seq, "       rpcs   %% cum %%\n");
 249
 250         read_tot = lprocfs_oh_sum(&filter->fo_r_pages);
 251         write_tot = lprocfs_oh_sum(&filter->fo_w_pages);
 252
 253         read_cum = 0;
 254         write_cum = 0;
 255         for (i = 0; i < OBD_HIST_MAX; i++) {
 256                 unsigned long r = filter->fo_r_pages.oh_buckets[i];
 257                 unsigned long w = filter->fo_w_pages.oh_buckets[i];
 258                 read_cum += r;
 259                 write_cum += w;
 260                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 261                                  1 << i, r, pct(r, read_tot),
 262                                  pct(read_cum, read_tot), w,
 263                                  pct(w, write_tot),
 264                                  pct(write_cum, write_tot));
 265                 if (read_cum == read_tot && write_cum == write_tot)
 266                         break;
 267         }
 268
 269         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 270         seq_printf(seq, "discont pages        rpcs   %% cum %% |");
 271         seq_printf(seq, "       rpcs   %% cum %%\n");
 272
 273         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_pages);
 274         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_pages);
 275
 276         read_cum = 0;
 277         write_cum = 0;
 278
 279         for (i = 0; i < OBD_HIST_MAX; i++) {
 280                 unsigned long r = filter->fo_r_discont_pages.oh_buckets[i];
 281                 unsigned long w = filter->fo_w_discont_pages.oh_buckets[i];
 282                 read_cum += r;
 283                 write_cum += w;
 284                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 285                                  i, r, pct(r, read_tot),
 286                                  pct(read_cum, read_tot), w,
 287                                  pct(w, write_tot),
 288                                  pct(write_cum, write_tot));
 289                 if (read_cum == read_tot && write_cum == write_tot)
 290                         break;
 291         }
 292
 293         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 294         seq_printf(seq, "discont blocks        rpcs   %% cum %% |");
 295         seq_printf(seq, "       rpcs   %% cum %%\n");
 296
 297         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_blocks);
 298         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_blocks);
 299
 300         read_cum = 0;
 301         write_cum = 0;
 302         for (i = 0; i < OBD_HIST_MAX; i++) {
 303                 unsigned long r = filter->fo_r_discont_blocks.oh_buckets[i];
 304                 unsigned long w = filter->fo_w_discont_blocks.oh_buckets[i];
 305                 read_cum += r;
 306                 write_cum += w;
 307                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 308                                  i, r, pct(r, read_tot),
 309                                  pct(read_cum, read_tot), w,
 310                                  pct(w, write_tot),
 311                                  pct(write_cum, write_tot));
 312                 if (read_cum == read_tot && write_cum == write_tot)
 313                         break;
 314         }
 315
 316         return 0;
 317 }
 318 #undef pct
 319
 320 static void *filter_brw_stats_seq_start(struct seq_file *p, loff_t *pos)
 321 {
 322         if (*pos == 0)
 323                 return (void *)1;
 324         return NULL;
 325 }
 326 static void *filter_brw_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 327 {
 328         ++*pos;
 329         return NULL;
 330 }
 331 static void filter_brw_stats_seq_stop(struct seq_file *p, void *v)
 332 {
 333 }
 334 struct seq_operations filter_brw_stats_seq_sops = {
 335         .start = filter_brw_stats_seq_start,
 336         .stop = filter_brw_stats_seq_stop,
 337         .next = filter_brw_stats_seq_next,
 338         .show = filter_brw_stats_seq_show,
 339 };
 340
 341 static int filter_brw_stats_seq_open(struct inode *inode, struct file *file)
 342 {
 343         struct proc_dir_entry *dp = PDE(inode);
 344         struct seq_file *seq;
 345         int rc;
 346
 347         rc = seq_open(file, &filter_brw_stats_seq_sops);
 348         if (rc)
 349                 return rc;
 350         seq = file->private_data;
 351         seq->private = dp->data;
 352         return 0;
 353 }
 354
 355 static ssize_t filter_brw_stats_seq_write(struct file *file, const char *buf,
 356                                        size_t len, loff_t *off)
 357 {
 358         struct seq_file *seq = file->private_data;
 359         struct obd_device *dev = seq->private;
 360         struct filter_obd *filter = &dev->u.filter;
 361
 362         lprocfs_oh_clear(&filter->fo_r_pages);
 363         lprocfs_oh_clear(&filter->fo_w_pages);
 364         lprocfs_oh_clear(&filter->fo_r_discont_pages);
 365         lprocfs_oh_clear(&filter->fo_w_discont_pages);
 366         lprocfs_oh_clear(&filter->fo_r_discont_blocks);
 367         lprocfs_oh_clear(&filter->fo_w_discont_blocks);
 368
 369         return len;
 370 }
 371
 372 struct file_operations filter_brw_stats_fops = {
 373         .owner   = THIS_MODULE,
 374         .open    = filter_brw_stats_seq_open,
 375         .read    = seq_read,
 376         .write   = filter_brw_stats_seq_write,
 377         .llseek  = seq_lseek,
 378         .release = seq_release,
 379 };
 380
 381 int lproc_filter_attach_seqstat(struct obd_device *dev)
 382 {
 383         return lprocfs_obd_seq_create(dev, "brw_stats", 0444,
 384                                       &filter_brw_stats_fops, dev);
 385 }
 386
 387
 388
 389 #endif /* LPROCFS */
 390 LPROCFS_INIT_VARS(filter, lprocfs_module_vars, lprocfs_obd_vars)