kernel/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, 2012, 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         client_obd_list_lock(&cli->cl_loi_list_lock);
  53         len = sprintf(buf, "%u\n", cli->cl_max_rpcs_in_flight);
  54         client_obd_list_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         client_obd_list_lock(&cli->cl_loi_list_lock);
  78         cli->cl_max_rpcs_in_flight = val;
  79         client_obd_list_unlock(&cli->cl_loi_list_lock);
  80
  81         return count;
  82 }
  83 LUSTRE_RW_ATTR(max_rpcs_in_flight);
  84
  85 static int mdc_kuc_open(struct inode *inode, struct file *file)
  86 {
  87         return single_open(file, NULL, inode->i_private);
  88 }
  89
  90 /* temporary for testing */
  91 static ssize_t mdc_kuc_write(struct file *file,
  92                                 const char __user *buffer,
  93                                 size_t count, loff_t *off)
  94 {
  95         struct obd_device *obd =
  96                         ((struct seq_file *)file->private_data)->private;
  97         struct kuc_hdr          *lh;
  98         struct hsm_action_list  *hal;
  99         struct hsm_action_item  *hai;
 100         int                      len;
 101         int                      fd, rc;
 102
 103         rc = lprocfs_write_helper(buffer, count, &fd);
 104         if (rc)
 105                 return rc;
 106
 107         if (fd < 0)
 108                 return -ERANGE;
 109         CWARN("message to fd %d\n", fd);
 110
 111         len = sizeof(*lh) + sizeof(*hal) + MTI_NAME_MAXLEN +
 112                 /* for mockup below */ 2 * cfs_size_round(sizeof(*hai));
 113
 114         lh = kzalloc(len, GFP_NOFS);
 115         if (!lh)
 116                 return -ENOMEM;
 117
 118         lh->kuc_magic = KUC_MAGIC;
 119         lh->kuc_transport = KUC_TRANSPORT_HSM;
 120         lh->kuc_msgtype = HMT_ACTION_LIST;
 121         lh->kuc_msglen = len;
 122
 123         hal = (struct hsm_action_list *)(lh + 1);
 124         hal->hal_version = HAL_VERSION;
 125         hal->hal_archive_id = 1;
 126         hal->hal_flags = 0;
 127         obd_uuid2fsname(hal->hal_fsname, obd->obd_name, MTI_NAME_MAXLEN);
 128
 129         /* mock up an action list */
 130         hal->hal_count = 2;
 131         hai = hai_zero(hal);
 132         hai->hai_action = HSMA_ARCHIVE;
 133         hai->hai_fid.f_oid = 5;
 134         hai->hai_len = sizeof(*hai);
 135         hai = hai_next(hai);
 136         hai->hai_action = HSMA_RESTORE;
 137         hai->hai_fid.f_oid = 10;
 138         hai->hai_len = sizeof(*hai);
 139
 140         /* This works for either broadcast or unicast to a single fd */
 141         if (fd == 0) {
 142                 rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
 143         } else {
 144                 struct file *fp = fget(fd);
 145
 146                 rc = libcfs_kkuc_msg_put(fp, lh);
 147                 fput(fp);
 148         }
 149         kfree(lh);
 150         if (rc < 0)
 151                 return rc;
 152         return count;
 153 }
 154
 155 static struct file_operations mdc_kuc_fops = {
 156         .open           = mdc_kuc_open,
 157         .write          = mdc_kuc_write,
 158         .release        = single_release,
 159 };
 160
 161 LPROC_SEQ_FOPS_WR_ONLY(mdc, ping);
 162
 163 LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
 164 LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
 165 LPROC_SEQ_FOPS_RO_TYPE(mdc, conn_uuid);
 166 LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
 167 LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
 168
 169 /*
 170  * Note: below sysfs entry is provided, but not currently in use, instead
 171  * sbi->sb_md_brw_size is used, the per obd variable should be used
 172  * when DNE is enabled, and dir pages are managed in MDC layer.
 173  * Don't forget to enable sysfs store function then.
 174  */
 175 static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
 176                                       struct attribute *attr,
 177                                       char *buf)
 178 {
 179         struct obd_device *dev = container_of(kobj, struct obd_device,
 180                                               obd_kobj);
 181         struct client_obd *cli = &dev->u.cli;
 182
 183         return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
 184 }
 185 LUSTRE_RO_ATTR(max_pages_per_rpc);
 186
 187 LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
 188 LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
 189
 190 static struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
 191         { "ping",               &mdc_ping_fops,                 NULL, 0222 },
 192         { "connect_flags",      &mdc_connect_flags_fops,        NULL, 0 },
 193         /*{ "filegroups",       lprocfs_rd_filegroups,          NULL, 0 },*/
 194         { "mds_server_uuid",    &mdc_server_uuid_fops,          NULL, 0 },
 195         { "mds_conn_uuid",      &mdc_conn_uuid_fops,            NULL, 0 },
 196         { "timeouts",           &mdc_timeouts_fops,             NULL, 0 },
 197         { "import",             &mdc_import_fops,               NULL, 0 },
 198         { "state",              &mdc_state_fops,                NULL, 0 },
 199         { "hsm_nl",             &mdc_kuc_fops,                  NULL, 0200 },
 200         { "pinger_recov",       &mdc_pinger_recov_fops,         NULL, 0 },
 201         { NULL }
 202 };
 203
 204 static struct attribute *mdc_attrs[] = {
 205         &lustre_attr_max_rpcs_in_flight.attr,
 206         &lustre_attr_max_pages_per_rpc.attr,
 207         NULL,
 208 };
 209
 210 static struct attribute_group mdc_attr_group = {
 211         .attrs = mdc_attrs,
 212 };
 213
 214 void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars)
 215 {
 216         lvars->sysfs_vars   = &mdc_attr_group;
 217         lvars->obd_vars     = lprocfs_mdc_obd_vars;
 218 }