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
 164 int lprocfs_filter_rd_blacklist(char *page, char **start, off_t off, int count,
 165                                 int *eof, void *data)
 166 {
 167         int rc;
 168
 169         rc = blacklist_display(page, count);
 170         *eof = 1;
 171         return rc;
 172 }
 173
 174 static
 175 int lprocfs_filter_wr_blacklist(struct file *file, const char *buffer,
 176                                 unsigned long count, void *data)
 177 {
 178         int add;
 179         uid_t uid = -1;
 180
 181         if (count < 2)
 182                 return count;
 183         if (buffer[0] == '+')
 184                 add = 1;
 185         else if (buffer[0] == '-')
 186                 add = 0;
 187         else
 188                 return count;
 189
 190         sscanf(buffer + 1, "%u", &uid);
 191         if (add)
 192                 blacklist_add(uid);
 193         else
 194                 blacklist_del(uid);
 195         return count;
 196 }
 197
 198 static struct lprocfs_vars lprocfs_obd_vars[] = {
 199         { "uuid",         lprocfs_rd_uuid,          0, 0 },
 200         { "blocksize",    lprocfs_rd_blksize,       0, 0 },
 201         { "kbytestotal",  lprocfs_rd_kbytestotal,   0, 0 },
 202         { "kbytesfree",   lprocfs_rd_kbytesfree,    0, 0 },
 203         { "kbytesavail",  lprocfs_rd_kbytesavail,   0, 0 },
 204         { "filestotal",   lprocfs_rd_filestotal,    0, 0 },
 205         { "filesfree",    lprocfs_rd_filesfree,     0, 0 },
 206         { "filegroups",   lprocfs_filter_rd_groups, 0, 0 },
 207         { "fstype",       lprocfs_rd_fstype,        0, 0 },
 208         { "mntdev",       lprocfs_filter_rd_mntdev, 0, 0 },
 209         { "last_id",      lprocfs_filter_rd_last_id,0, 0 },
 210         { "tot_dirty",    lprocfs_filter_rd_tot_dirty,   0, 0 },
 211         { "tot_pending",  lprocfs_filter_rd_tot_pending, 0, 0 },
 212         { "tot_granted",  lprocfs_filter_rd_tot_granted, 0, 0 },
 213         { "num_exports",  lprocfs_rd_num_exports,   0, 0 },
 214         { "readcache_max_filesize",
 215                           lprocfs_filter_rd_readcache,
 216                           lprocfs_filter_wr_readcache, 0 },
 217         { "recovery_status", lprocfs_obd_rd_recovery_status, 0, 0 },
 218         { "capa",         lprocfs_filter_rd_capa_stat,
 219                           lprocfs_filter_wr_capa_stat, 0 },
 220         { "blacklist",    lprocfs_filter_rd_blacklist,
 221                           lprocfs_filter_wr_blacklist, 0 },
 222         { 0 }
 223 };
 224
 225 static struct lprocfs_vars lprocfs_module_vars[] = {
 226         { "num_refs",     lprocfs_rd_numrefs,       0, 0 },
 227         { 0 }
 228 };
 229
 230 void filter_tally_write(struct filter_obd *filter, struct page **pages,
 231                      int nr_pages, unsigned long *blocks, int blocks_per_page)
 232 {
 233         struct page *last_page = NULL;
 234         unsigned long *last_block = NULL;
 235         unsigned long discont_pages = 0;
 236         unsigned long discont_blocks = 0;
 237         int i;
 238
 239         if (nr_pages == 0)
 240                 return;
 241
 242         lprocfs_oh_tally_log2(&filter->fo_w_pages, nr_pages);
 243
 244         while (nr_pages-- > 0) {
 245                 if (last_page && (*pages)->index != (last_page->index + 1))
 246                         discont_pages++;
 247                 last_page = *pages;
 248                 pages++;
 249                 for (i = 0; i < blocks_per_page; i++) {
 250                         if (last_block && *blocks != (*last_block + 1))
 251                                 discont_blocks++;
 252                         last_block = blocks++;
 253                 }
 254         }
 255
 256         lprocfs_oh_tally(&filter->fo_w_discont_pages, discont_pages);
 257         lprocfs_oh_tally(&filter->fo_w_discont_blocks, discont_blocks);
 258 }
 259
 260 void filter_tally_read(struct filter_obd *filter, struct niobuf_local *lnb,
 261                        int niocount)
 262 {
 263         struct niobuf_local *end;
 264         struct page *last_page = NULL;
 265         unsigned long discont_pages = 0;
 266         unsigned long discont_blocks = 0;
 267
 268         if (niocount == 0)
 269                 return;
 270
 271         for (end = lnb + niocount; lnb < end && lnb->page; lnb++) {
 272                 struct page *page = lnb->page;
 273                 if (last_page) {
 274                        if (page->index != (last_page->index + 1))
 275                                 discont_pages++;
 276                         /* XXX not so smart for now */
 277 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 278                         if ((page->buffers && last_page->buffers) &&
 279                             (page->buffers->b_blocknr !=
 280                              (last_page->buffers->b_blocknr + 1)))
 281                                 discont_blocks++;
 282 #else
 283 #warning "port on 2.6 -bzzz"
 284 #endif
 285                 }
 286                 last_page = page;
 287         }
 288
 289         lprocfs_oh_tally_log2(&filter->fo_r_pages, niocount);
 290         lprocfs_oh_tally(&filter->fo_r_discont_pages, discont_pages);
 291         lprocfs_oh_tally(&filter->fo_r_discont_blocks, discont_blocks);
 292 }
 293
 294 #define pct(a,b) (b ? a * 100 / b : 0)
 295
 296 static int filter_brw_stats_seq_show(struct seq_file *seq, void *v)
 297 {
 298         struct timeval now;
 299         struct obd_device *dev = seq->private;
 300         struct filter_obd *filter = &dev->u.filter;
 301         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 302         int i;
 303
 304         do_gettimeofday(&now);
 305
 306         /* this sampling races with updates */
 307
 308         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 309                    now.tv_sec, now.tv_usec);
 310
 311         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 312         seq_printf(seq, "pages per brw         brws   %% cum %% |");
 313         seq_printf(seq, "       rpcs   %% cum %%\n");
 314
 315         read_tot = lprocfs_oh_sum(&filter->fo_r_pages);
 316         write_tot = lprocfs_oh_sum(&filter->fo_w_pages);
 317
 318         read_cum = 0;
 319         write_cum = 0;
 320         for (i = 0; i < OBD_HIST_MAX; i++) {
 321                 unsigned long r = filter->fo_r_pages.oh_buckets[i];
 322                 unsigned long w = filter->fo_w_pages.oh_buckets[i];
 323                 read_cum += r;
 324                 write_cum += w;
 325                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 326                                  1 << i, r, pct(r, read_tot),
 327                                  pct(read_cum, read_tot), w,
 328                                  pct(w, write_tot),
 329                                  pct(write_cum, write_tot));
 330                 if (read_cum == read_tot && write_cum == write_tot)
 331                         break;
 332         }
 333
 334         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 335         seq_printf(seq, "discont pages        rpcs   %% cum %% |");
 336         seq_printf(seq, "       rpcs   %% cum %%\n");
 337
 338         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_pages);
 339         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_pages);
 340
 341         read_cum = 0;
 342         write_cum = 0;
 343
 344         for (i = 0; i < OBD_HIST_MAX; i++) {
 345                 unsigned long r = filter->fo_r_discont_pages.oh_buckets[i];
 346                 unsigned long w = filter->fo_w_discont_pages.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                                  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, "discont blocks        rpcs   %% cum %% |");
 360         seq_printf(seq, "       rpcs   %% cum %%\n");
 361
 362         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_blocks);
 363         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_blocks);
 364
 365         read_cum = 0;
 366         write_cum = 0;
 367         for (i = 0; i < OBD_HIST_MAX; i++) {
 368                 unsigned long r = filter->fo_r_discont_blocks.oh_buckets[i];
 369                 unsigned long w = filter->fo_w_discont_blocks.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         return 0;
 382 }
 383 #undef pct
 384
 385 static void *filter_brw_stats_seq_start(struct seq_file *p, loff_t *pos)
 386 {
 387         if (*pos == 0)
 388                 return (void *)1;
 389         return NULL;
 390 }
 391 static void *filter_brw_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 392 {
 393         ++*pos;
 394         return NULL;
 395 }
 396 static void filter_brw_stats_seq_stop(struct seq_file *p, void *v)
 397 {
 398 }
 399 struct seq_operations filter_brw_stats_seq_sops = {
 400         .start = filter_brw_stats_seq_start,
 401         .stop = filter_brw_stats_seq_stop,
 402         .next = filter_brw_stats_seq_next,
 403         .show = filter_brw_stats_seq_show,
 404 };
 405
 406 static int filter_brw_stats_seq_open(struct inode *inode, struct file *file)
 407 {
 408         struct proc_dir_entry *dp = PDE(inode);
 409         struct seq_file *seq;
 410         int rc;
 411
 412         rc = seq_open(file, &filter_brw_stats_seq_sops);
 413         if (rc)
 414                 return rc;
 415         seq = file->private_data;
 416         seq->private = dp->data;
 417         return 0;
 418 }
 419
 420 static ssize_t filter_brw_stats_seq_write(struct file *file, const char *buf,
 421                                        size_t len, loff_t *off)
 422 {
 423         struct seq_file *seq = file->private_data;
 424         struct obd_device *dev = seq->private;
 425         struct filter_obd *filter = &dev->u.filter;
 426
 427         lprocfs_oh_clear(&filter->fo_r_pages);
 428         lprocfs_oh_clear(&filter->fo_w_pages);
 429         lprocfs_oh_clear(&filter->fo_r_discont_pages);
 430         lprocfs_oh_clear(&filter->fo_w_discont_pages);
 431         lprocfs_oh_clear(&filter->fo_r_discont_blocks);
 432         lprocfs_oh_clear(&filter->fo_w_discont_blocks);
 433
 434         return len;
 435 }
 436
 437 struct file_operations filter_brw_stats_fops = {
 438         .owner   = THIS_MODULE,
 439         .open    = filter_brw_stats_seq_open,
 440         .read    = seq_read,
 441         .write   = filter_brw_stats_seq_write,
 442         .llseek  = seq_lseek,
 443         .release = seq_release,
 444 };
 445
 446 int lproc_filter_attach_seqstat(struct obd_device *dev)
 447 {
 448         return lprocfs_obd_seq_create(dev, "brw_stats", 0444,
 449                                       &filter_brw_stats_fops, dev);
 450 }
 451
 452
 453
 454 #endif /* LPROCFS */
 455 LPROCFS_INIT_VARS(filter, lprocfs_module_vars, lprocfs_obd_vars)