lustre/osd-zfs/osd_lproc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * Copyright (c) 2011, 2012 Whamcloud, Inc.
  32  * Use is subject to license terms.
  33  */
  34 /*
  35  * This file is part of Lustre, http://www.lustre.org/
  36  * Lustre is a trademark of Sun Microsystems, Inc.
  37  *
  38  * lustre/osd-zfs/osd_lproc.c
  39  *
  40  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  41  * Author: Mike Pershin <tappro@whamcloud.com>
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_CLASS
  45
  46 #include <obd.h>
  47 #include <lprocfs_status.h>
  48 #include <lu_time.h>
  49
  50 #include <lustre/lustre_idl.h>
  51
  52 #include "udmu.h"
  53 #include "osd_internal.h"
  54
  55 #ifdef LPROCFS
  56
  57 static int osd_stats_init(struct osd_device *osd)
  58 {
  59         int result;
  60         ENTRY;
  61
  62         osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
  63         if (osd->od_stats != NULL) {
  64                 result = lprocfs_register_stats(osd->od_proc_entry, "stats",
  65                                 osd->od_stats);
  66                 if (result)
  67                         GOTO(out, result);
  68
  69                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
  70                                 LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
  71                                 "get_page", "usec");
  72                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
  73                                 LPROCFS_CNTR_AVGMINMAX,
  74                                 "get_page_failures", "num");
  75                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
  76                                 LPROCFS_CNTR_AVGMINMAX,
  77                                 "cache_access", "pages");
  78                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
  79                                 LPROCFS_CNTR_AVGMINMAX,
  80                                 "cache_hit", "pages");
  81                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
  82                                 LPROCFS_CNTR_AVGMINMAX,
  83                                 "cache_miss", "pages");
  84                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_COPY_IO,
  85                                 LPROCFS_CNTR_AVGMINMAX,
  86                                 "copy", "pages");
  87                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_ZEROCOPY_IO,
  88                                 LPROCFS_CNTR_AVGMINMAX,
  89                                 "zerocopy", "pages");
  90                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_TAIL_IO,
  91                                 LPROCFS_CNTR_AVGMINMAX,
  92                                 "tail", "pages");
  93 #ifdef OSD_THANDLE_STATS
  94                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
  95                                 LPROCFS_CNTR_AVGMINMAX,
  96                                 "thandle_starting", "usec");
  97                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
  98                                 LPROCFS_CNTR_AVGMINMAX,
  99                                 "thandle_open", "usec");
 100                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
 101                                 LPROCFS_CNTR_AVGMINMAX,
 102                                 "thandle_closing", "usec");
 103 #endif
 104         } else {
 105                 result = -ENOMEM;
 106         }
 107
 108 out:
 109         RETURN(result);
 110 }
 111
 112 static int lprocfs_osd_rd_fstype(char *page, char **start, off_t off,
 113                                 int count, int *eof, void *data)
 114 {
 115         return snprintf(page, count, "zfs\n");
 116 }
 117
 118 static int lprocfs_osd_rd_mntdev(char *page, char **start, off_t off, int count,
 119                                 int *eof, void *data)
 120 {
 121         struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
 122
 123         LASSERT(osd != NULL);
 124         *eof = 1;
 125
 126         return snprintf(page, count, "%s\n", osd->od_mntdev);
 127 }
 128
 129 static int lprocfs_osd_wr_force_sync(struct file *file, const char *buffer,
 130                                         unsigned long count, void *data)
 131 {
 132         struct dt_device  *dt = data;
 133         struct lu_env      env;
 134         int rc;
 135
 136         rc = lu_env_init(&env, LCT_LOCAL);
 137         if (rc)
 138                 return rc;
 139         rc = dt_sync(&env, dt);
 140         lu_env_fini(&env);
 141
 142         return rc == 0 ? count : rc;
 143 }
 144
 145 static int lprocfs_osd_rd_iused_est(char *page, char **start, off_t off, int count,
 146                                         int *eof, void *data)
 147 {
 148         struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
 149         LASSERT(osd != NULL);
 150
 151         return snprintf(page, count, "%d\n", osd->od_quota_iused_est);
 152 }
 153
 154 static int lprocfs_osd_wr_iused_est(struct file *file, const char *buffer,
 155                                         unsigned long count, void *data)
 156 {
 157         struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
 158         int                rc, val;
 159
 160         LASSERT(osd != NULL);
 161
 162         rc = lprocfs_write_helper(buffer, count, &val);
 163         if (rc)
 164                 return rc;
 165
 166         osd->od_quota_iused_est = !!val;
 167
 168         return count;
 169 }
 170
 171 struct lprocfs_vars lprocfs_osd_obd_vars[] = {
 172         { "blocksize",       lprocfs_osd_rd_blksize,     0, 0 },
 173         { "kbytestotal",     lprocfs_osd_rd_kbytestotal, 0, 0 },
 174         { "kbytesfree",      lprocfs_osd_rd_kbytesfree,  0, 0 },
 175         { "kbytesavail",     lprocfs_osd_rd_kbytesavail, 0, 0 },
 176         { "filestotal",      lprocfs_osd_rd_filestotal,  0, 0 },
 177         { "filesfree",       lprocfs_osd_rd_filesfree,   0, 0 },
 178         { "fstype",          lprocfs_osd_rd_fstype,      0, 0 },
 179         { "mntdev",          lprocfs_osd_rd_mntdev,      0, 0 },
 180         { "force_sync",      0, lprocfs_osd_wr_force_sync     },
 181         { "quota_iused_estimate",  lprocfs_osd_rd_iused_est,
 182                 lprocfs_osd_wr_iused_est,   0, 0 },
 183         { 0 }
 184 };
 185
 186 struct lprocfs_vars lprocfs_osd_module_vars[] = {
 187         { "num_refs",        lprocfs_rd_numrefs,         0, 0 },
 188         { 0 }
 189 };
 190
 191 int osd_procfs_init(struct osd_device *osd, const char *name)
 192 {
 193         struct lu_device    *ld = &osd->od_dt_dev.dd_lu_dev;
 194         struct obd_type     *type = ld->ld_type->ldt_obd_type;
 195         int                  rc;
 196         ENTRY;
 197
 198         if (osd->od_proc_entry)
 199                 RETURN(0);
 200
 201         LASSERT(name != NULL);
 202         LASSERT(type != NULL);
 203
 204         osd->od_proc_entry = lprocfs_register(name, type->typ_procroot,
 205                         lprocfs_osd_obd_vars, &osd->od_dt_dev);
 206         if (IS_ERR(osd->od_proc_entry)) {
 207                 rc = PTR_ERR(osd->od_proc_entry);
 208                 CERROR("Error %d setting up lprocfs for %s\n", rc, name);
 209                 osd->od_proc_entry = NULL;
 210                 GOTO(out, rc);
 211         }
 212
 213         rc = osd_stats_init(osd);
 214
 215         GOTO(out, rc);
 216 out:
 217         if (rc)
 218                 osd_procfs_fini(osd);
 219         return rc;
 220 }
 221
 222 int osd_procfs_fini(struct osd_device *osd)
 223 {
 224         ENTRY;
 225
 226         if (osd->od_stats)
 227                 lprocfs_free_stats(&osd->od_stats);
 228
 229         if (osd->od_proc_entry) {
 230                 lprocfs_remove(&osd->od_proc_entry);
 231                 osd->od_proc_entry = NULL;
 232         }
 233
 234         RETURN(0);
 235 }
 236
 237 #endif