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_OSD
  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 zfs_osd_fstype_seq_show(struct seq_file *m, void *data)
 111 {
 112         return seq_printf(m, "zfs\n");
 113 }
 114 LPROC_SEQ_FOPS_RO(zfs_osd_fstype);
 115
 116 static int zfs_osd_mntdev_seq_show(struct seq_file *m, void *data)
 117 {
 118         struct osd_device *osd = osd_dt_dev((struct dt_device *)m->private);
 119
 120         LASSERT(osd != NULL);
 121         return seq_printf(m, "%s\n", osd->od_mntdev);
 122 }
 123 LPROC_SEQ_FOPS_RO(zfs_osd_mntdev);
 124
 125 static ssize_t
 126 lprocfs_osd_force_sync_seq_write(struct file *file, const char __user *buffer,
 127                                 size_t count, loff_t *off)
 128 {
 129         struct seq_file   *m = file->private_data;
 130         struct dt_device  *dt = m->private;
 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 LPROC_SEQ_FOPS_WO_TYPE(zfs, osd_force_sync);
 143
 144 static int zfs_osd_iused_est_seq_show(struct seq_file *m, void *data)
 145 {
 146         struct osd_device *osd = osd_dt_dev((struct dt_device *)m->private);
 147         LASSERT(osd != NULL);
 148
 149         return seq_printf(m, "%d\n", osd->od_quota_iused_est);
 150 }
 151
 152 static ssize_t
 153 zfs_osd_iused_est_seq_write(struct file *file, const char __user *buffer,
 154                              size_t count, loff_t *off)
 155 {
 156         struct seq_file   *m = file->private_data;
 157         struct dt_device  *dt = m->private;
 158         struct osd_device *osd = osd_dt_dev(dt);
 159         int                rc, val;
 160
 161         LASSERT(osd != NULL);
 162
 163         rc = lprocfs_write_helper(buffer, count, &val);
 164         if (rc)
 165                 return rc;
 166
 167         osd->od_quota_iused_est = !!val;
 168
 169         return count;
 170 }
 171 LPROC_SEQ_FOPS(zfs_osd_iused_est);
 172
 173 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_blksize);
 174 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytestotal);
 175 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytesfree);
 176 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytesavail);
 177 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_filestotal);
 178 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_filesfree);
 179
 180 struct lprocfs_seq_vars lprocfs_osd_obd_vars[] = {
 181         { .name =       "blocksize",
 182           .fops =       &zfs_dt_blksize_fops            },
 183         { .name =       "kbytestotal",
 184           .fops =       &zfs_dt_kbytestotal_fops        },
 185         { .name =       "kbytesfree",
 186           .fops =       &zfs_dt_kbytesfree_fops         },
 187         { .name =       "kbytesavail",
 188           .fops =       &zfs_dt_kbytesavail_fops        },
 189         { .name =       "filestotal",
 190           .fops =       &zfs_dt_filestotal_fops         },
 191         { .name =       "filesfree",
 192           .fops =       &zfs_dt_filesfree_fops          },
 193         { .name =       "fstype",
 194           .fops =       &zfs_osd_fstype_fops            },
 195         { .name =       "mntdev",
 196           .fops =       &zfs_osd_mntdev_fops            },
 197         { .name =       "force_sync",
 198           .fops =       &zfs_osd_force_sync_fops        },
 199         { .name =       "quota_iused_estimate",
 200           .fops =       &zfs_osd_iused_est_fops         },
 201         { 0 }
 202 };
 203
 204 int osd_procfs_init(struct osd_device *osd, const char *name)
 205 {
 206         struct obd_type *type;
 207         int              rc;
 208         ENTRY;
 209
 210         if (osd->od_proc_entry)
 211                 RETURN(0);
 212
 213         /* at the moment there is no linkage between lu_type
 214          * and obd_type, so we lookup obd_type this way */
 215         type = class_search_type(LUSTRE_OSD_ZFS_NAME);
 216
 217         LASSERT(name != NULL);
 218         LASSERT(type != NULL);
 219
 220         osd->od_proc_entry = lprocfs_seq_register(name, type->typ_procroot,
 221                         lprocfs_osd_obd_vars, &osd->od_dt_dev);
 222         if (IS_ERR(osd->od_proc_entry)) {
 223                 rc = PTR_ERR(osd->od_proc_entry);
 224                 CERROR("Error %d setting up lprocfs for %s\n", rc, name);
 225                 osd->od_proc_entry = NULL;
 226                 GOTO(out, rc);
 227         }
 228
 229         rc = osd_stats_init(osd);
 230
 231         GOTO(out, rc);
 232 out:
 233         if (rc)
 234                 osd_procfs_fini(osd);
 235         return rc;
 236 }
 237
 238 int osd_procfs_fini(struct osd_device *osd)
 239 {
 240         ENTRY;
 241
 242         if (osd->od_stats)
 243                 lprocfs_free_stats(&osd->od_stats);
 244
 245         if (osd->od_proc_entry) {
 246                 lprocfs_remove(&osd->od_proc_entry);
 247                 osd->od_proc_entry = NULL;
 248         }
 249
 250         RETURN(0);
 251 }
 252
 253 #endif