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 int mdc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
  44 {
  45         struct obd_device *dev = m->private;
  46         struct client_obd *cli = &dev->u.cli;
  47
  48         client_obd_list_lock(&cli->cl_loi_list_lock);
  49         seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight);
  50         client_obd_list_unlock(&cli->cl_loi_list_lock);
  51
  52         return 0;
  53 }
  54
  55 static ssize_t mdc_max_rpcs_in_flight_seq_write(struct file *file,
  56                                                 const char __user *buffer,
  57                                                 size_t count,
  58                                                 loff_t *off)
  59 {
  60         struct obd_device *dev =
  61                         ((struct seq_file *)file->private_data)->private;
  62         struct client_obd *cli = &dev->u.cli;
  63         int val, rc;
  64
  65         rc = lprocfs_write_helper(buffer, count, &val);
  66         if (rc)
  67                 return rc;
  68
  69         if (val < 1 || val > MDC_MAX_RIF_MAX)
  70                 return -ERANGE;
  71
  72         client_obd_list_lock(&cli->cl_loi_list_lock);
  73         cli->cl_max_rpcs_in_flight = val;
  74         client_obd_list_unlock(&cli->cl_loi_list_lock);
  75
  76         return count;
  77 }
  78 LPROC_SEQ_FOPS(mdc_max_rpcs_in_flight);
  79
  80 static int mdc_kuc_open(struct inode *inode, struct file *file)
  81 {
  82         return single_open(file, NULL, PDE_DATA(inode));
  83 }
  84
  85 /* temporary for testing */
  86 static ssize_t mdc_kuc_write(struct file *file,
  87                                 const char __user *buffer,
  88                                 size_t count, loff_t *off)
  89 {
  90         struct obd_device *obd =
  91                         ((struct seq_file *)file->private_data)->private;
  92         struct kuc_hdr          *lh;
  93         struct hsm_action_list  *hal;
  94         struct hsm_action_item  *hai;
  95         int                      len;
  96         int                      fd, rc;
  97
  98         rc = lprocfs_write_helper(buffer, count, &fd);
  99         if (rc)
 100                 return rc;
 101
 102         if (fd < 0)
 103                 return -ERANGE;
 104         CWARN("message to fd %d\n", fd);
 105
 106         len = sizeof(*lh) + sizeof(*hal) + MTI_NAME_MAXLEN +
 107                 /* for mockup below */ 2 * cfs_size_round(sizeof(*hai));
 108
 109         OBD_ALLOC(lh, len);
 110         if (!lh)
 111                 return -ENOMEM;
 112
 113         lh->kuc_magic = KUC_MAGIC;
 114         lh->kuc_transport = KUC_TRANSPORT_HSM;
 115         lh->kuc_msgtype = HMT_ACTION_LIST;
 116         lh->kuc_msglen = len;
 117
 118         hal = (struct hsm_action_list *)(lh + 1);
 119         hal->hal_version = HAL_VERSION;
 120         hal->hal_archive_id = 1;
 121         hal->hal_flags = 0;
 122         obd_uuid2fsname(hal->hal_fsname, obd->obd_name, MTI_NAME_MAXLEN);
 123
 124         /* mock up an action list */
 125         hal->hal_count = 2;
 126         hai = hai_zero(hal);
 127         hai->hai_action = HSMA_ARCHIVE;
 128         hai->hai_fid.f_oid = 5;
 129         hai->hai_len = sizeof(*hai);
 130         hai = hai_next(hai);
 131         hai->hai_action = HSMA_RESTORE;
 132         hai->hai_fid.f_oid = 10;
 133         hai->hai_len = sizeof(*hai);
 134
 135         /* This works for either broadcast or unicast to a single fd */
 136         if (fd == 0) {
 137                 rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
 138         } else {
 139                 struct file *fp = fget(fd);
 140
 141                 rc = libcfs_kkuc_msg_put(fp, lh);
 142                 fput(fp);
 143         }
 144         OBD_FREE(lh, len);
 145         if (rc < 0)
 146                 return rc;
 147         return count;
 148 }
 149
 150 struct file_operations mdc_kuc_fops = {
 151         .open           = mdc_kuc_open,
 152         .write          = mdc_kuc_write,
 153         .release        = single_release,
 154 };
 155
 156 LPROC_SEQ_FOPS_WR_ONLY(mdc, ping);
 157
 158 LPROC_SEQ_FOPS_RO_TYPE(mdc, uuid);
 159 LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
 160 LPROC_SEQ_FOPS_RO_TYPE(mdc, blksize);
 161 LPROC_SEQ_FOPS_RO_TYPE(mdc, kbytestotal);
 162 LPROC_SEQ_FOPS_RO_TYPE(mdc, kbytesfree);
 163 LPROC_SEQ_FOPS_RO_TYPE(mdc, kbytesavail);
 164 LPROC_SEQ_FOPS_RO_TYPE(mdc, filestotal);
 165 LPROC_SEQ_FOPS_RO_TYPE(mdc, filesfree);
 166 LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
 167 LPROC_SEQ_FOPS_RO_TYPE(mdc, conn_uuid);
 168 LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
 169 LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
 170
 171 static int mdc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
 172 {
 173         return lprocfs_obd_rd_max_pages_per_rpc(m, m->private);
 174 }
 175 LPROC_SEQ_FOPS_RO(mdc_obd_max_pages_per_rpc);
 176
 177 LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
 178 LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
 179
 180 static struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
 181         { "uuid",               &mdc_uuid_fops,                 NULL, 0 },
 182         { "ping",               &mdc_ping_fops,                 NULL, 0222 },
 183         { "connect_flags",      &mdc_connect_flags_fops,        NULL, 0 },
 184         { "blocksize",          &mdc_blksize_fops,              NULL, 0 },
 185         { "kbytestotal",        &mdc_kbytestotal_fops,          NULL, 0 },
 186         { "kbytesfree",         &mdc_kbytesfree_fops,           NULL, 0 },
 187         { "kbytesavail",        &mdc_kbytesavail_fops,          NULL, 0 },
 188         { "filestotal",         &mdc_filestotal_fops,           NULL, 0 },
 189         { "filesfree",          &mdc_filesfree_fops,            NULL, 0 },
 190         /*{ "filegroups",       lprocfs_rd_filegroups,          NULL, 0 },*/
 191         { "mds_server_uuid",    &mdc_server_uuid_fops,          NULL, 0 },
 192         { "mds_conn_uuid",      &mdc_conn_uuid_fops,            NULL, 0 },
 193         /*
 194          * FIXME: below proc entry is provided, but not in used, instead
 195          * sbi->sb_md_brw_size is used, the per obd variable should be used
 196          * when CMD is enabled, and dir pages are managed in MDC layer.
 197          * Remember to enable proc write function.
 198          */
 199         { "max_pages_per_rpc",  &mdc_obd_max_pages_per_rpc_fops, NULL, 0 },
 200         { "max_rpcs_in_flight", &mdc_max_rpcs_in_flight_fops,   NULL, 0 },
 201         { "timeouts",           &mdc_timeouts_fops,             NULL, 0 },
 202         { "import",             &mdc_import_fops,               NULL, 0 },
 203         { "state",              &mdc_state_fops,                NULL, 0 },
 204         { "hsm_nl",             &mdc_kuc_fops,                  NULL, 0200 },
 205         { "pinger_recov",       &mdc_pinger_recov_fops,         NULL, 0 },
 206         { NULL }
 207 };
 208
 209 LPROC_SEQ_FOPS_RO_TYPE(mdc, numrefs);
 210
 211 static struct lprocfs_vars lprocfs_mdc_module_vars[] = {
 212         { "num_refs",           &mdc_numrefs_fops,              NULL, 0 },
 213         { NULL }
 214 };
 215
 216 void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars)
 217 {
 218         lvars->module_vars  = lprocfs_mdc_module_vars;
 219         lvars->obd_vars     = lprocfs_mdc_obd_vars;
 220 }