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_filesopen(char *page, char **start, off_t off,
  53                                     int count, int *eof, void *data)
  54 {
  55         struct obd_device *obd = data;
  56         LASSERT(obd != NULL);
  57         *eof = 1;
  58
  59         return snprintf(page, count, "%d\n",
  60                         atomic_read(&obd->u.mds.mds_open_count));
  61 }
  62
  63 static int lprocfs_mds_rd_recovery_status(char *page, char **start, off_t off,
  64                                           int count, int *eof, void *data)
  65 {
  66         struct obd_device *obd = data;
  67         int len = 0, n,
  68                 connected = obd->obd_connected_clients,
  69                 max_recoverable = obd->obd_max_recoverable_clients,
  70                 recoverable = obd->obd_recoverable_clients,
  71                 completed = max_recoverable - recoverable,
  72                 queue_len = obd->obd_requests_queued_for_recovery,
  73                 replayed = obd->obd_replayed_requests;
  74         __u64 next_transno = obd->obd_next_recovery_transno;
  75
  76         LASSERT(obd != NULL);
  77         *eof = 1;
  78
  79         n = snprintf(page, count, "status: ");
  80         page += n; len += n; count -= n;
  81         if (obd->obd_max_recoverable_clients == 0) {
  82                 n = snprintf(page, count, "INACTIVE\n");
  83                 return len + n;
  84         }
  85
  86         if (obd->obd_recoverable_clients == 0) {
  87                 n = snprintf(page, count, "COMPLETE\n");
  88                 page += n; len += n; count -= n;
  89                 n = snprintf(page, count, "recovered_clients: %d\n",
  90                              max_recoverable);
  91                 page += n; len += n; count -= n;
  92                 n = snprintf(page, count, "last_transno: "LPD64"\n",
  93                              next_transno - 1);
  94                 page += n; len += n; count -= n;
  95                 n = snprintf(page, count, "replayed_requests: %d\n", replayed);
  96                 return len + n;
  97         }
  98
  99         /* sampled unlocked, but really... */
 100         if (obd->obd_recovering == 0) {
 101                 n = snprintf(page, count, "ABORTED\n");
 102                 return len + n;
 103         }
 104
 105         n = snprintf(page, count, "RECOVERING\n");
 106         page += n; len += n; count -= n;
 107         n = snprintf(page, count, "connected_clients: %d/%d\n",
 108                      connected, max_recoverable);
 109         page += n; len += n; count -= n;
 110         n = snprintf(page, count, "completed_clients: %d/%d\n",
 111                      completed, max_recoverable);
 112         page += n; len += n; count -= n;
 113         n = snprintf(page, count, "replayed_requests: %d/??\n", replayed);
 114         page += n; len += n; count -= n;
 115         n = snprintf(page, count, "queued_requests: %d\n", queue_len);
 116         page += n; len += n; count -= n;
 117         n = snprintf(page, count, "next_transno: "LPD64"\n", next_transno);
 118         return len + n;
 119 }
 120
 121 static int lprocfs_mds_wr_evict_client(struct file *file, const char *buffer,
 122                                        unsigned long count, void *data)
 123 {
 124         struct obd_device *obd = data;
 125         struct obd_export *doomed_exp = NULL;
 126         struct obd_uuid doomed;
 127         struct list_head *p;
 128         char tmpbuf[sizeof(doomed)];
 129
 130         sscanf(buffer, "%40s", tmpbuf);
 131         obd_str2uuid(&doomed, tmpbuf);
 132
 133         spin_lock(&obd->obd_dev_lock);
 134         list_for_each(p, &obd->obd_exports) {
 135                 doomed_exp = list_entry(p, struct obd_export, exp_obd_chain);
 136                 if (obd_uuid_equals(&doomed, &doomed_exp->exp_client_uuid)) {
 137                         class_export_get(doomed_exp);
 138                         break;
 139                 }
 140                 doomed_exp = NULL;
 141         }
 142         spin_unlock(&obd->obd_dev_lock);
 143
 144         if (doomed_exp == NULL) {
 145                 CERROR("can't disconnect %s: no export found\n",
 146                        doomed.uuid);
 147         } else {
 148                 CERROR("evicting %s at adminstrative request\n",
 149                        doomed.uuid);
 150                 ptlrpc_fail_export(doomed_exp);
 151                 class_export_put(doomed_exp);
 152         }
 153         return count;
 154 }
 155
 156 struct lprocfs_vars lprocfs_mds_obd_vars[] = {
 157         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 158         { "blocksize",    lprocfs_rd_blksize,     0, 0 },
 159         { "kbytestotal",  lprocfs_rd_kbytestotal, 0, 0 },
 160         { "kbytesfree",   lprocfs_rd_kbytesfree,  0, 0 },
 161         { "kbytesavail",  lprocfs_rd_kbytesavail, 0, 0 },
 162         { "fstype",       lprocfs_rd_fstype,      0, 0 },
 163         { "filestotal",   lprocfs_rd_filestotal,  0, 0 },
 164         { "filesfree",    lprocfs_rd_filesfree,   0, 0 },
 165         { "filesopen",    lprocfs_mds_rd_filesopen,   0, 0 },
 166         { "mntdev",       lprocfs_mds_rd_mntdev,  0, 0 },
 167         { "recovery_status", lprocfs_mds_rd_recovery_status, 0, 0 },
 168         { "evict_client", 0, lprocfs_mds_wr_evict_client, 0 },
 169         { "num_exports",  lprocfs_rd_num_exports, 0, 0 },
 170         { 0 }
 171 };
 172
 173 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 174         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 175         { 0 }
 176 };
 177
 178 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 179         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 180         { 0 }
 181 };
 182
 183 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 184         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 185         { 0 }
 186 };
 187
 188 #endif
 189
 190 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 191                                                      lprocfs_mds_obd_vars},
 192                                                     {lprocfs_mdt_module_vars,
 193                                                      lprocfs_mdt_obd_vars}};
 194
 195 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 196                         (sizeof(lprocfs_array_vars) /
 197                          sizeof(struct lprocfs_static_vars)))