drivers/staging/lustre/lustre/mdc/lproc_mdc.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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32 #define DEBUG_SUBSYSTEM S_CLASS
  33
  34 #include <linux/vfs.h>
  35 #include <obd_class.h>
  36 #include <lprocfs_status.h>
  37 #include "mdc_internal.h"
  38
  39 static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
  40                            char *buf)
  41 {
  42         struct obd_device *dev = container_of(kobj, struct obd_device,
  43                                               obd_kobj);
  44
  45         return sprintf(buf, "%u\n", !dev->u.cli.cl_import->imp_deactive);
  46 }
  47
  48 static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
  49                             const char *buffer, size_t count)
  50 {
  51         struct obd_device *dev = container_of(kobj, struct obd_device,
  52                                               obd_kobj);
  53         unsigned long val;
  54         int rc;
  55
  56         rc = kstrtoul(buffer, 10, &val);
  57         if (rc)
  58                 return rc;
  59
  60         if (val > 1)
  61                 return -ERANGE;
  62
  63         /* opposite senses */
  64         if (dev->u.cli.cl_import->imp_deactive == val) {
  65                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  66                 if (rc)
  67                         count = rc;
  68         } else {
  69                 CDEBUG(D_CONFIG, "activate %lu: ignoring repeat request\n", val);
  70         }
  71         return count;
  72 }
  73 LUSTRE_RW_ATTR(active);
  74
  75 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  76                                        struct attribute *attr,
  77                                        char *buf)
  78 {
  79         int len;
  80         struct obd_device *dev = container_of(kobj, struct obd_device,
  81                                               obd_kobj);
  82         __u32 max;
  83
  84         max = obd_get_max_rpcs_in_flight(&dev->u.cli);
  85         len = sprintf(buf, "%u\n", max);
  86
  87         return len;
  88 }
  89
  90 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  91                                         struct attribute *attr,
  92                                         const char *buffer,
  93                                         size_t count)
  94 {
  95         struct obd_device *dev = container_of(kobj, struct obd_device,
  96                                               obd_kobj);
  97         int rc;
  98         unsigned long val;
  99
 100         rc = kstrtoul(buffer, 10, &val);
 101         if (rc)
 102                 return rc;
 103
 104         rc = obd_set_max_rpcs_in_flight(&dev->u.cli, val);
 105         if (rc)
 106                 count = rc;
 107
 108         return count;
 109 }
 110 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 111
 112 static ssize_t max_mod_rpcs_in_flight_show(struct kobject *kobj,
 113                                            struct attribute *attr,
 114                                            char *buf)
 115 {
 116         struct obd_device *dev = container_of(kobj, struct obd_device,
 117                                               obd_kobj);
 118         u16 max;
 119         int len;
 120
 121         max = dev->u.cli.cl_max_mod_rpcs_in_flight;
 122         len = sprintf(buf, "%hu\n", max);
 123
 124         return len;
 125 }
 126
 127 static ssize_t max_mod_rpcs_in_flight_store(struct kobject *kobj,
 128                                             struct attribute *attr,
 129                                             const char *buffer,
 130                                             size_t count)
 131 {
 132         struct obd_device *dev = container_of(kobj, struct obd_device,
 133                                               obd_kobj);
 134         u16 val;
 135         int rc;
 136
 137         rc = kstrtou16(buffer, 10, &val);
 138         if (rc)
 139                 return rc;
 140
 141         rc = obd_set_max_mod_rpcs_in_flight(&dev->u.cli, val);
 142         if (rc)
 143                 count = rc;
 144
 145         return count;
 146 }
 147 LUSTRE_RW_ATTR(max_mod_rpcs_in_flight);
 148
 149 static int mdc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 150 {
 151         struct obd_device *dev = seq->private;
 152
 153         return obd_mod_rpc_stats_seq_show(&dev->u.cli, seq);
 154 }
 155
 156 static ssize_t mdc_rpc_stats_seq_write(struct file *file,
 157                                        const char __user *buf,
 158                                        size_t len, loff_t *off)
 159 {
 160         struct seq_file *seq = file->private_data;
 161         struct obd_device *dev = seq->private;
 162         struct client_obd *cli = &dev->u.cli;
 163
 164         lprocfs_oh_clear(&cli->cl_mod_rpcs_hist);
 165
 166         return len;
 167 }
 168 LPROC_SEQ_FOPS(mdc_rpc_stats);
 169
 170 LPROC_SEQ_FOPS_WR_ONLY(mdc, ping);
 171
 172 LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
 173 LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
 174 LPROC_SEQ_FOPS_RO_TYPE(mdc, conn_uuid);
 175 LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
 176 LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
 177
 178 /*
 179  * Note: below sysfs entry is provided, but not currently in use, instead
 180  * sbi->sb_md_brw_size is used, the per obd variable should be used
 181  * when DNE is enabled, and dir pages are managed in MDC layer.
 182  * Don't forget to enable sysfs store function then.
 183  */
 184 static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
 185                                       struct attribute *attr,
 186                                       char *buf)
 187 {
 188         struct obd_device *dev = container_of(kobj, struct obd_device,
 189                                               obd_kobj);
 190         struct client_obd *cli = &dev->u.cli;
 191
 192         return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
 193 }
 194 LUSTRE_RO_ATTR(max_pages_per_rpc);
 195
 196 LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
 197 LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
 198
 199 static struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
 200         { "ping",               &mdc_ping_fops,                 NULL, 0222 },
 201         { "connect_flags",      &mdc_connect_flags_fops,        NULL, 0 },
 202         /*{ "filegroups",       lprocfs_rd_filegroups,          NULL, 0 },*/
 203         { "mds_server_uuid",    &mdc_server_uuid_fops,          NULL, 0 },
 204         { "mds_conn_uuid",      &mdc_conn_uuid_fops,            NULL, 0 },
 205         { "timeouts",           &mdc_timeouts_fops,             NULL, 0 },
 206         { "import",             &mdc_import_fops,               NULL, 0 },
 207         { "state",              &mdc_state_fops,                NULL, 0 },
 208         { "pinger_recov",       &mdc_pinger_recov_fops,         NULL, 0 },
 209         { .name =       "rpc_stats",
 210           .fops =       &mdc_rpc_stats_fops             },
 211         { NULL }
 212 };
 213
 214 static struct attribute *mdc_attrs[] = {
 215         &lustre_attr_active.attr,
 216         &lustre_attr_max_rpcs_in_flight.attr,
 217         &lustre_attr_max_mod_rpcs_in_flight.attr,
 218         &lustre_attr_max_pages_per_rpc.attr,
 219         NULL,
 220 };
 221
 222 static const struct attribute_group mdc_attr_group = {
 223         .attrs = mdc_attrs,
 224 };
 225
 226 void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars)
 227 {
 228         lvars->sysfs_vars   = &mdc_attr_group;
 229         lvars->obd_vars     = lprocfs_mdc_obd_vars;
 230 }