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
  32 #ifndef LPROCFS
  33 struct lprocfs_vars lprocfs_mds_obd_vars[]  = { {0} };
  34 struct lprocfs_vars lprocfs_mds_module_vars[] = { {0} };
  35 struct lprocfs_vars lprocfs_mdt_obd_vars[] = { {0} };
  36 struct lprocfs_vars lprocfs_mdt_module_vars[] = { {0} };
  37
  38 #else
  39
  40 static int lprocfs_mds_rd_mntdev(char *page, char **start, off_t off, int count,
  41                                  int *eof, void *data)
  42 {
  43         struct obd_device* obd = (struct obd_device *)data;
  44
  45         LASSERT(obd != NULL);
  46         LASSERT(obd->u.mds.mds_vfsmnt->mnt_devname);
  47         *eof = 1;
  48
  49         return snprintf(page, count, "%s\n",obd->u.mds.mds_vfsmnt->mnt_devname);
  50 }
  51
  52 static int lprocfs_mds_rd_recovery_status(char *page, char **start, off_t off,
  53                                           int count, int *eof, void *data)
  54 {
  55         struct obd_device *obd = data;
  56         int len = 0, n,
  57                 connected = obd->obd_connected_clients,
  58                 max_recoverable = obd->obd_max_recoverable_clients,
  59                 recoverable = obd->obd_recoverable_clients,
  60                 completed = max_recoverable - recoverable,
  61                 queue_len = obd->obd_requests_queued_for_recovery,
  62                 replayed = obd->obd_replayed_requests;
  63         __u64 next_transno = obd->obd_next_recovery_transno;
  64
  65         LASSERT(obd != NULL);
  66         *eof = 1;
  67
  68         n = snprintf(page, count, "status: ");
  69         page += n; len += n; count -= n;
  70         if (obd->obd_max_recoverable_clients == 0) {
  71                 n = snprintf(page, count, "INACTIVE\n");
  72                 return len + n;
  73         }
  74
  75         if (obd->obd_recoverable_clients == 0) {
  76                 n = snprintf(page, count, "COMPLETE\n");
  77                 page += n; len += n; count -= n;
  78                 n = snprintf(page, count, "recovered_clients: %d\n",
  79                              max_recoverable);
  80                 page += n; len += n; count -= n;
  81                 n = snprintf(page, count, "last_transno: "LPD64"\n",
  82                              next_transno - 1);
  83                 page += n; len += n; count -= n;
  84                 n = snprintf(page, count, "replayed_requests: %d\n", replayed);
  85                 return len + n;
  86         }
  87
  88         /* sampled unlocked, but really... */
  89         if (obd->obd_recovering == 0) {
  90                 n = snprintf(page, count, "ABORTED\n");
  91                 return len + n;
  92         }
  93
  94         n = snprintf(page, count, "RECOVERING\n");
  95         page += n; len += n; count -= n;
  96         n = snprintf(page, count, "connected_clients: %d/%d\n",
  97                      connected, max_recoverable);
  98         page += n; len += n; count -= n;
  99         n = snprintf(page, count, "completed_clients: %d/%d\n",
 100                      completed, max_recoverable);
 101         page += n; len += n; count -= n;
 102         n = snprintf(page, count, "replayed_requests: %d/??\n", replayed);
 103         page += n; len += n; count -= n;
 104         n = snprintf(page, count, "queued_requests: %d\n", queue_len);
 105         page += n; len += n; count -= n;
 106         n = snprintf(page, count, "next_transno: "LPD64"\n", next_transno);
 107         return len + n;
 108 }
 109
 110 static int lprocfs_mds_wr_evict_client(struct file *file, const char *buffer,
 111                                        unsigned long count, void *data)
 112 {
 113         struct obd_device *obd = data;
 114         struct obd_export *doomed_exp = NULL;
 115         struct obd_uuid doomed;
 116         struct list_head *p;
 117         char tmpbuf[sizeof(doomed)];
 118
 119         sscanf(buffer, "%40s", tmpbuf);
 120         obd_str2uuid(&doomed, tmpbuf);
 121
 122         spin_lock(&obd->obd_dev_lock);
 123         list_for_each(p, &obd->obd_exports) {
 124                 doomed_exp = list_entry(p, struct obd_export, exp_obd_chain);
 125                 if (obd_uuid_equals(&doomed, &doomed_exp->exp_client_uuid)) {
 126                         class_export_get(doomed_exp);
 127                         break;
 128                 }
 129                 doomed_exp = NULL;
 130         }
 131         spin_unlock(&obd->obd_dev_lock);
 132
 133         if (doomed_exp == NULL) {
 134                 CERROR("can't disconnect %s: no export found\n",
 135                        doomed.uuid);
 136         } else {
 137                 CERROR("evicting %s at adminstrative request\n",
 138                        doomed.uuid);
 139                 ptlrpc_fail_export(doomed_exp);
 140                 class_export_put(doomed_exp);
 141         }
 142         return count;
 143 }
 144
 145 struct lprocfs_vars lprocfs_mds_obd_vars[] = {
 146         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 147         { "blocksize",    lprocfs_rd_blksize,     0, 0 },
 148         { "kbytestotal",  lprocfs_rd_kbytestotal, 0, 0 },
 149         { "kbytesfree",   lprocfs_rd_kbytesfree,  0, 0 },
 150         { "fstype",       lprocfs_rd_fstype,      0, 0 },
 151         { "filestotal",   lprocfs_rd_filestotal,  0, 0 },
 152         { "filesfree",    lprocfs_rd_filesfree,   0, 0 },
 153         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 154         { "mntdev",       lprocfs_mds_rd_mntdev,  0, 0 },
 155         { "recovery_status", lprocfs_mds_rd_recovery_status, 0, 0 },
 156         { "evict_client", 0, lprocfs_mds_wr_evict_client, 0 },
 157         { 0 }
 158 };
 159
 160 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 161         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 162         { 0 }
 163 };
 164
 165 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 166         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 167         { 0 }
 168 };
 169
 170 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 171         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 172         { 0 }
 173 };
 174
 175 #endif
 176 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 177                                                      lprocfs_mds_obd_vars},
 178                                                     {lprocfs_mdt_module_vars,
 179                                                      lprocfs_mdt_obd_vars}};
 180
 181 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 182                         (sizeof(lprocfs_array_vars) /
 183                          sizeof(struct lprocfs_static_vars)))