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