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.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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2015, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_CLASS
  37
  38 #include <linux/vfs.h>
  39 #include "../include/obd_class.h"
  40 #include "../include/lprocfs_status.h"
  41 #include "mdc_internal.h"
  42
  43 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  44                                        struct attribute *attr,
  45                                        char *buf)
  46 {
  47         int len;
  48         struct obd_device *dev = container_of(kobj, struct obd_device,
  49                                               obd_kobj);
  50         struct client_obd *cli = &dev->u.cli;
  51
  52         spin_lock(&cli->cl_loi_list_lock);
  53         len = sprintf(buf, "%u\n", cli->cl_max_rpcs_in_flight);
  54         spin_unlock(&cli->cl_loi_list_lock);
  55
  56         return len;
  57 }
  58
  59 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  60                                         struct attribute *attr,
  61                                         const char *buffer,
  62                                         size_t count)
  63 {
  64         struct obd_device *dev = container_of(kobj, struct obd_device,
  65                                               obd_kobj);
  66         struct client_obd *cli = &dev->u.cli;
  67         int rc;
  68         unsigned long val;
  69
  70         rc = kstrtoul(buffer, 10, &val);
  71         if (rc)
  72                 return rc;
  73
  74         if (val < 1 || val > MDC_MAX_RIF_MAX)
  75                 return -ERANGE;
  76
  77         spin_lock(&cli->cl_loi_list_lock);
  78         cli->cl_max_rpcs_in_flight = val;
  79         spin_unlock(&cli->cl_loi_list_lock);
  80
  81         return count;
  82 }
  83 LUSTRE_RW_ATTR(max_rpcs_in_flight);
  84
  85 LPROC_SEQ_FOPS_WR_ONLY(mdc, ping);
  86
  87 LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
  88 LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
  89 LPROC_SEQ_FOPS_RO_TYPE(mdc, conn_uuid);
  90 LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
  91 LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
  92
  93 /*
  94  * Note: below sysfs entry is provided, but not currently in use, instead
  95  * sbi->sb_md_brw_size is used, the per obd variable should be used
  96  * when DNE is enabled, and dir pages are managed in MDC layer.
  97  * Don't forget to enable sysfs store function then.
  98  */
  99 static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
 100                                       struct attribute *attr,
 101                                       char *buf)
 102 {
 103         struct obd_device *dev = container_of(kobj, struct obd_device,
 104                                               obd_kobj);
 105         struct client_obd *cli = &dev->u.cli;
 106
 107         return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
 108 }
 109 LUSTRE_RO_ATTR(max_pages_per_rpc);
 110
 111 LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
 112 LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
 113
 114 static struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
 115         { "ping",               &mdc_ping_fops,                 NULL, 0222 },
 116         { "connect_flags",      &mdc_connect_flags_fops,        NULL, 0 },
 117         /*{ "filegroups",       lprocfs_rd_filegroups,          NULL, 0 },*/
 118         { "mds_server_uuid",    &mdc_server_uuid_fops,          NULL, 0 },
 119         { "mds_conn_uuid",      &mdc_conn_uuid_fops,            NULL, 0 },
 120         { "timeouts",           &mdc_timeouts_fops,             NULL, 0 },
 121         { "import",             &mdc_import_fops,               NULL, 0 },
 122         { "state",              &mdc_state_fops,                NULL, 0 },
 123         { "pinger_recov",       &mdc_pinger_recov_fops,         NULL, 0 },
 124         { NULL }
 125 };
 126
 127 static struct attribute *mdc_attrs[] = {
 128         &lustre_attr_max_rpcs_in_flight.attr,
 129         &lustre_attr_max_pages_per_rpc.attr,
 130         NULL,
 131 };
 132
 133 static struct attribute_group mdc_attr_group = {
 134         .attrs = mdc_attrs,
 135 };
 136
 137 void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars)
 138 {
 139         lvars->sysfs_vars   = &mdc_attr_group;
 140         lvars->obd_vars     = lprocfs_mdc_obd_vars;
 141 }