lustre/mds/lproc_mds.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22 #define DEBUG_SUBSYSTEM S_CLASS
  23
  24 #include <linux/version.h>
  25 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  26 #include <asm/statfs.h>
  27 #endif
  28 #include <linux/obd.h>
  29 #include <linux/obd_class.h>
  30 #include <linux/lprocfs_status.h>
  31 #include "mds_internal.h"
  32
  33 #ifndef LPROCFS
  34 struct lprocfs_vars lprocfs_mds_obd_vars[]  = { {0} };
  35 struct lprocfs_vars lprocfs_mds_module_vars[] = { {0} };
  36 struct lprocfs_vars lprocfs_mdt_obd_vars[] = { {0} };
  37 struct lprocfs_vars lprocfs_mdt_module_vars[] = { {0} };
  38
  39 #else
  40
  41 static int lprocfs_mds_rd_mntdev(char *page, char **start, off_t off, int count,
  42                                  int *eof, void *data)
  43 {
  44         struct obd_device* obd = (struct obd_device *)data;
  45
  46         LASSERT(obd != NULL);
  47         LASSERT(obd->u.mds.mds_vfsmnt->mnt_devname);
  48         *eof = 1;
  49
  50         return snprintf(page, count, "%s\n",obd->u.mds.mds_vfsmnt->mnt_devname);
  51 }
  52
  53 static int lprocfs_mds_rd_recovery_status(char *page, char **start, off_t off,
  54                                           int count, int *eof, void *data)
  55 {
  56         struct obd_device *obd = data;
  57         int len = 0, n,
  58                 connected = obd->obd_connected_clients,
  59                 max_recoverable = obd->obd_max_recoverable_clients,
  60                 recoverable = obd->obd_recoverable_clients,
  61                 completed = max_recoverable - recoverable,
  62                 queue_len = obd->obd_requests_queued_for_recovery,
  63                 replayed = obd->obd_replayed_requests;
  64         __u64 next_transno = obd->obd_next_recovery_transno;
  65
  66         LASSERT(obd != NULL);
  67         *eof = 1;
  68
  69         n = snprintf(page, count, "status: ");
  70         page += n; len += n; count -= n;
  71         if (obd->obd_max_recoverable_clients == 0) {
  72                 n = snprintf(page, count, "INACTIVE\n");
  73                 return len + n;
  74         }
  75
  76         if (obd->obd_recoverable_clients == 0) {
  77                 n = snprintf(page, count, "COMPLETE\n");
  78                 page += n; len += n; count -= n;
  79                 n = snprintf(page, count, "recovered_clients: %d\n",
  80                              max_recoverable);
  81                 page += n; len += n; count -= n;
  82                 n = snprintf(page, count, "last_transno: "LPD64"\n",
  83                              next_transno - 1);
  84                 page += n; len += n; count -= n;
  85                 n = snprintf(page, count, "replayed_requests: %d\n", replayed);
  86                 return len + n;
  87         }
  88
  89         /* sampled unlocked, but really... */
  90         if (obd->obd_recovering == 0) {
  91                 n = snprintf(page, count, "ABORTED\n");
  92                 return len + n;
  93         }
  94
  95         n = snprintf(page, count, "RECOVERING\n");
  96         page += n; len += n; count -= n;
  97         n = snprintf(page, count, "connected_clients: %d/%d\n",
  98                      connected, max_recoverable);
  99         page += n; len += n; count -= n;
 100         n = snprintf(page, count, "completed_clients: %d/%d\n",
 101                      completed, max_recoverable);
 102         page += n; len += n; count -= n;
 103         n = snprintf(page, count, "replayed_requests: %d/??\n", replayed);
 104         page += n; len += n; count -= n;
 105         n = snprintf(page, count, "queued_requests: %d\n", queue_len);
 106         page += n; len += n; count -= n;
 107         n = snprintf(page, count, "next_transno: "LPD64"\n", next_transno);
 108         return len + n;
 109 }
 110
 111 static int lprocfs_mds_wr_evict_client(struct file *file, const char *buffer,
 112                                        unsigned long count, void *data)
 113 {
 114         struct obd_device *obd = data;
 115         struct obd_export *doomed_exp = NULL;
 116         struct obd_uuid doomed;
 117         struct list_head *p;
 118         char tmpbuf[sizeof(doomed)];
 119
 120         sscanf(buffer, "%40s", tmpbuf);
 121         obd_str2uuid(&doomed, tmpbuf);
 122
 123         spin_lock(&obd->obd_dev_lock);
 124         list_for_each(p, &obd->obd_exports) {
 125                 doomed_exp = list_entry(p, struct obd_export, exp_obd_chain);
 126                 if (obd_uuid_equals(&doomed, &doomed_exp->exp_client_uuid)) {
 127                         class_export_get(doomed_exp);
 128                         break;
 129                 }
 130                 doomed_exp = NULL;
 131         }
 132         spin_unlock(&obd->obd_dev_lock);
 133
 134         if (doomed_exp == NULL) {
 135                 CERROR("can't disconnect %s: no export found\n",
 136                        doomed.uuid);
 137         } else {
 138                 CERROR("evicting %s at adminstrative request\n",
 139                        doomed.uuid);
 140                 ptlrpc_fail_export(doomed_exp);
 141                 class_export_put(doomed_exp);
 142         }
 143         return count;
 144 }
 145
 146 static int lprocfs_mds_wr_config_update(struct file *file, const char *buffer,
 147                                         unsigned long count, void *data)
 148 {
 149         struct obd_device *obd = data;
 150         ENTRY;
 151
 152         RETURN(mds_lov_update_config(obd, 0));
 153 }
 154
 155 struct lprocfs_vars lprocfs_mds_obd_vars[] = {
 156         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 157         { "blocksize",    lprocfs_rd_blksize,     0, 0 },
 158         { "kbytestotal",  lprocfs_rd_kbytestotal, 0, 0 },
 159         { "kbytesfree",   lprocfs_rd_kbytesfree,  0, 0 },
 160         { "kbytesavail",  lprocfs_rd_kbytesavail, 0, 0 },
 161         { "fstype",       lprocfs_rd_fstype,      0, 0 },
 162         { "filestotal",   lprocfs_rd_filestotal,  0, 0 },
 163         { "filesfree",    lprocfs_rd_filesfree,   0, 0 },
 164         { "mntdev",       lprocfs_mds_rd_mntdev,  0, 0 },
 165         { "recovery_status", lprocfs_mds_rd_recovery_status, 0, 0 },
 166         { "evict_client", 0, lprocfs_mds_wr_evict_client, 0 },
 167         { "config_update", 0, lprocfs_mds_wr_config_update, 0 },
 168         { "num_exports",  lprocfs_rd_num_exports, 0, 0 },
 169         { 0 }
 170 };
 171
 172 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 173         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 174         { 0 }
 175 };
 176
 177 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 178         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 179         { 0 }
 180 };
 181
 182 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 183         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 184         { 0 }
 185 };
 186
 187 #endif
 188
 189 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 190                                                      lprocfs_mds_obd_vars},
 191                                                     {lprocfs_mdt_module_vars,
 192                                                      lprocfs_mdt_obd_vars}};
 193
 194 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 195                         (sizeof(lprocfs_array_vars) /
 196                          sizeof(struct lprocfs_static_vars)))