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