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) 2012, Intel Corporation.
  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 <obd_class.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre/lustre_idl.h>
  50
  51 #include "osd_internal.h"
  52
  53 #ifdef LPROCFS
  54
  55 static int osd_stats_init(struct osd_device *osd)
  56 {
  57         int result;
  58         ENTRY;
  59
  60         osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
  61         if (osd->od_stats != NULL) {
  62                 result = lprocfs_register_stats(osd->od_proc_entry, "stats",
  63                                 osd->od_stats);
  64                 if (result)
  65                         GOTO(out, result);
  66
  67                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
  68                                 LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
  69                                 "get_page", "usec");
  70                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
  71                                 LPROCFS_CNTR_AVGMINMAX,
  72                                 "get_page_failures", "num");
  73                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
  74                                 LPROCFS_CNTR_AVGMINMAX,
  75                                 "cache_access", "pages");
  76                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
  77                                 LPROCFS_CNTR_AVGMINMAX,
  78                                 "cache_hit", "pages");
  79                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
  80                                 LPROCFS_CNTR_AVGMINMAX,
  81                                 "cache_miss", "pages");
  82                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_COPY_IO,
  83                                 LPROCFS_CNTR_AVGMINMAX,
  84                                 "copy", "pages");
  85                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_ZEROCOPY_IO,
  86                                 LPROCFS_CNTR_AVGMINMAX,
  87                                 "zerocopy", "pages");
  88                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_TAIL_IO,
  89                                 LPROCFS_CNTR_AVGMINMAX,
  90                                 "tail", "pages");
  91 #ifdef OSD_THANDLE_STATS
  92                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
  93                                 LPROCFS_CNTR_AVGMINMAX,
  94                                 "thandle_starting", "usec");
  95                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
  96                                 LPROCFS_CNTR_AVGMINMAX,
  97                                 "thandle_open", "usec");
  98                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
  99                                 LPROCFS_CNTR_AVGMINMAX,
 100                                 "thandle_closing", "usec");
 101 #endif
 102         } else {
 103                 result = -ENOMEM;
 104         }
 105
 106 out:
 107         RETURN(result);
 108 }
 109
 110 static int lprocfs_osd_rd_fstype(char *page, char **start, off_t off,
 111                                 int count, int *eof, void *data)
 112 {
 113         return snprintf(page, count, "zfs\n");
 114 }
 115
 116 static int lprocfs_osd_rd_mntdev(char *page, char **start, off_t off, int count,
 117                                 int *eof, void *data)
 118 {
 119         struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
 120
 121         LASSERT(osd != NULL);
 122         *eof = 1;
 123
 124         return snprintf(page, count, "%s\n", osd->od_mntdev);
 125 }
 126
 127 static int lprocfs_osd_wr_force_sync(struct file *file, const char *buffer,
 128                                         unsigned long count, void *data)
 129 {
 130         struct dt_device  *dt = data;
 131         struct lu_env      env;
 132         int rc;
 133
 134         rc = lu_env_init(&env, LCT_LOCAL);
 135         if (rc)
 136                 return rc;
 137         rc = dt_sync(&env, dt);
 138         lu_env_fini(&env);
 139
 140         return rc == 0 ? count : rc;
 141 }
 142
 143 static int lprocfs_osd_rd_iused_est(char *page, char **start, off_t off,
 144                                     int count, int *eof, void *data)
 145 {
 146         struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
 147         LASSERT(osd != NULL);
 148
 149         return snprintf(page, count, "%d\n", osd->od_quota_iused_est);
 150 }
 151
 152 static int lprocfs_osd_wr_iused_est(struct file *file,
 153                                     const char __user *buffer,
 154                                     unsigned long count, void *data)
 155 {
 156         struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
 157         int                rc, val;
 158
 159         LASSERT(osd != NULL);
 160
 161         rc = lprocfs_write_helper(buffer, count, &val);
 162         if (rc)
 163                 return rc;
 164
 165         osd->od_quota_iused_est = !!val;
 166
 167         return count;
 168 }
 169
 170 struct lprocfs_vars lprocfs_osd_obd_vars[] = {
 171         { "blocksize",          lprocfs_dt_rd_blksize,  0, 0 },
 172         { "kbytestotal",        lprocfs_dt_rd_kbytestotal,      0, 0 },
 173         { "kbytesfree",         lprocfs_dt_rd_kbytesfree,       0, 0 },
 174         { "kbytesavail",        lprocfs_dt_rd_kbytesavail,      0, 0 },
 175         { "filestotal",         lprocfs_dt_rd_filestotal,       0, 0 },
 176         { "filesfree",          lprocfs_dt_rd_filesfree,        0, 0 },
 177         { "fstype",          lprocfs_osd_rd_fstype,      0, 0 },
 178         { "mntdev",          lprocfs_osd_rd_mntdev,      0, 0 },
 179         { "force_sync",      0, lprocfs_osd_wr_force_sync     },
 180         { "quota_iused_estimate",  lprocfs_osd_rd_iused_est,
 181                 lprocfs_osd_wr_iused_est,   0, 0 },
 182         { 0 }
 183 };
 184
 185 struct lprocfs_vars lprocfs_osd_module_vars[] = {
 186         { "num_refs",        lprocfs_rd_numrefs,         0, 0 },
 187         { 0 }
 188 };
 189
 190 int osd_procfs_init(struct osd_device *osd, const char *name)
 191 {
 192         struct obd_type *type;
 193         int              rc;
 194         ENTRY;
 195
 196         if (osd->od_proc_entry)
 197                 RETURN(0);
 198
 199         /* at the moment there is no linkage between lu_type
 200          * and obd_type, so we lookup obd_type this way */
 201         type = class_search_type(LUSTRE_OSD_ZFS_NAME);
 202
 203         LASSERT(name != NULL);
 204         LASSERT(type != NULL);
 205
 206         osd->od_proc_entry = lprocfs_register(name, type->typ_procroot,
 207                         lprocfs_osd_obd_vars, &osd->od_dt_dev);
 208         if (IS_ERR(osd->od_proc_entry)) {
 209                 rc = PTR_ERR(osd->od_proc_entry);
 210                 CERROR("Error %d setting up lprocfs for %s\n", rc, name);
 211                 osd->od_proc_entry = NULL;
 212                 GOTO(out, rc);
 213         }
 214
 215         rc = osd_stats_init(osd);
 216
 217         GOTO(out, rc);
 218 out:
 219         if (rc)
 220                 osd_procfs_fini(osd);
 221         return rc;
 222 }
 223
 224 int osd_procfs_fini(struct osd_device *osd)
 225 {
 226         ENTRY;
 227
 228         if (osd->od_stats)
 229                 lprocfs_free_stats(&osd->od_stats);
 230
 231         if (osd->od_proc_entry) {
 232                 lprocfs_remove(&osd->od_proc_entry);
 233                 osd->od_proc_entry = NULL;
 234         }
 235
 236         RETURN(0);
 237 }
 238
 239 #endif