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 atomic_t * lprocfs_alloc_mds_counters()
  40 {
  41         return NULL;
  42 }
  43 void lprocfs_free_mds_counters(atomic_t *ptr)
  44 {
  45         return;
  46 }
  47
  48 #else
  49
  50 struct ll_mdscounters_opcode {
  51      __u32       opcode;
  52      const char *opname;
  53 } ll_mdscounters_opcode_table[MDS_LAST_OPC_COUNT] = {
  54        { MDS_OPEN_COUNT,          "mds_open" },
  55        { MDS_CREATE_COUNT,        "mds_create" },
  56        { MDS_CLOSE_COUNT,         "mds_close" },
  57        { MDS_LINK_COUNT,          "mds_link" },
  58        { MDS_UNLINK_COUNT,        "mds_unlink" },
  59        { MDS_GETATTR_COUNT,       "mds_getattr" },
  60        { MDS_GETATTR_NAME_COUNT,  "mds_getattr_name" },
  61        { MDS_SETATTR_COUNT,       "mds_setattr" },
  62        { MDS_RENAME_COUNT,        "mds_rename" },
  63        { MDS_STATFS_COUNT,        "mds_statfs" },
  64 };
  65
  66 const char* ll_mds_count_opcode2str(__u32 opcode)
  67 {
  68         __u32 offset = opcode;
  69
  70         LASSERT(offset < MDS_LAST_OPC_COUNT);
  71         LASSERT(ll_mdscounters_opcode_table[offset].opcode == opcode);
  72         return ll_mdscounters_opcode_table[offset].opname;
  73 }
  74
  75 struct lprocfs_stats * lprocfs_alloc_mds_counters()
  76 {
  77         struct lprocfs_stats *counters;
  78         int i;
  79
  80         counters = lprocfs_alloc_stats(MDS_LAST_OPC_COUNT);
  81
  82         for (i = 0; i < MDS_LAST_OPC_COUNT; i ++) {
  83             lprocfs_counter_init(counters, i, 0,
  84                                  (char *)ll_mds_count_opcode2str(i), "reqs");
  85         }
  86         return counters;
  87 }
  88
  89 void lprocfs_free_mds_counters(struct lprocfs_stats *ptr)
  90 {
  91         lprocfs_free_stats(ptr);
  92 }
  93
  94 static int lprocfs_mds_rd_mntdev(char *page, char **start, off_t off, int count,
  95                                  int *eof, void *data)
  96 {
  97         struct obd_device* obd = (struct obd_device *)data;
  98
  99         LASSERT(obd != NULL);
 100         LASSERT(obd->u.mds.mds_vfsmnt->mnt_devname);
 101         *eof = 1;
 102
 103         return snprintf(page, count, "%s\n",obd->u.mds.mds_vfsmnt->mnt_devname);
 104 }
 105
 106 static int lprocfs_mds_rd_recovery_status(char *page, char **start, off_t off,
 107                                           int count, int *eof, void *data)
 108 {
 109         struct obd_device *obd = data;
 110         int len = 0, n,
 111                 connected = obd->obd_connected_clients,
 112                 max_recoverable = obd->obd_max_recoverable_clients,
 113                 recoverable = obd->obd_recoverable_clients,
 114                 completed = max_recoverable - recoverable,
 115                 queue_len = obd->obd_requests_queued_for_recovery,
 116                 replayed = obd->obd_replayed_requests;
 117         __u64 next_transno = obd->obd_next_recovery_transno;
 118
 119         LASSERT(obd != NULL);
 120         *eof = 1;
 121
 122         n = snprintf(page, count, "status: ");
 123         page += n; len += n; count -= n;
 124         if (obd->obd_max_recoverable_clients == 0) {
 125                 n = snprintf(page, count, "INACTIVE\n");
 126                 return len + n;
 127         }
 128
 129         if (obd->obd_recoverable_clients == 0) {
 130                 n = snprintf(page, count, "COMPLETE\n");
 131                 page += n; len += n; count -= n;
 132                 n = snprintf(page, count, "recovered_clients: %d\n",
 133                              max_recoverable);
 134                 page += n; len += n; count -= n;
 135                 n = snprintf(page, count, "last_transno: "LPD64"\n",
 136                              next_transno - 1);
 137                 page += n; len += n; count -= n;
 138                 n = snprintf(page, count, "replayed_requests: %d\n", replayed);
 139                 return len + n;
 140         }
 141
 142         /* sampled unlocked, but really... */
 143         if (obd->obd_recovering == 0) {
 144                 n = snprintf(page, count, "ABORTED\n");
 145                 return len + n;
 146         }
 147
 148         n = snprintf(page, count, "RECOVERING\n");
 149         page += n; len += n; count -= n;
 150         n = snprintf(page, count, "connected_clients: %d/%d\n",
 151                      connected, max_recoverable);
 152         page += n; len += n; count -= n;
 153         n = snprintf(page, count, "completed_clients: %d/%d\n",
 154                      completed, max_recoverable);
 155         page += n; len += n; count -= n;
 156         n = snprintf(page, count, "replayed_requests: %d/??\n", replayed);
 157         page += n; len += n; count -= n;
 158         n = snprintf(page, count, "queued_requests: %d\n", queue_len);
 159         page += n; len += n; count -= n;
 160         n = snprintf(page, count, "next_transno: "LPD64"\n", next_transno);
 161         return len + n;
 162 }
 163
 164 static int lprocfs_rd_mds_counters(char *page, char **start, off_t off,
 165                                           int count, int *eof, void *data)
 166 {
 167         struct obd_device* obd = (struct obd_device *)data;
 168         int len = 0, n, i, j;
 169         struct lprocfs_counter  t, ret = { .lc_min = ~(__u64)0 };
 170         struct lprocfs_stats *stats;
 171         struct timeval now;
 172
 173         LASSERT(obd != NULL);
 174         if (obd->u.mds.mds_counters == NULL)
 175                 return 0;
 176
 177         do_gettimeofday(&now);
 178
 179         n = snprintf(page, count, "%-25s %lu.%lu secs.usecs\n",
 180                                "snapshot_time", now.tv_sec, now.tv_usec);
 181         page += n; len +=n; count -=n;
 182
 183         stats = obd->u.mds.mds_counters;
 184
 185         *eof = 1;
 186         for (i = 0; i < MDS_LAST_OPC_COUNT; i ++) {
 187                 ret.lc_count = 0;
 188                 for (j = 0; j < num_online_cpus(); j++) {
 189                         struct lprocfs_counter *percpu_cntr =
 190                                 &(stats->ls_percpu[j])->lp_cntr[i];
 191                         int centry;
 192                         do {
 193                                 centry =
 194                                    atomic_read(&percpu_cntr->lc_cntl.la_entry);
 195                                 t.lc_count = percpu_cntr->lc_count;
 196                         } while (centry !=
 197                                  atomic_read(&percpu_cntr->lc_cntl.la_entry) &&
 198                                  centry !=
 199                                  atomic_read(&percpu_cntr->lc_cntl.la_exit));
 200                         ret.lc_count += t.lc_count;
 201                }
 202                 n = snprintf(page, count, "%-25s "LPU64" \n",
 203                                    ll_mds_count_opcode2str(i), ret.lc_count);
 204                 page += n; len +=n; count -=n;
 205         }
 206         return (len);
 207 }
 208
 209 static int lprocfs_mds_wr_evict_client(struct file *file, const char *buffer,
 210                                        unsigned long count, void *data)
 211 {
 212         struct obd_device *obd = data;
 213         struct obd_export *doomed_exp = NULL;
 214         struct obd_uuid doomed;
 215         struct list_head *p;
 216         char tmpbuf[sizeof(doomed)];
 217
 218         sscanf(buffer, "%40s", tmpbuf);
 219         obd_str2uuid(&doomed, tmpbuf);
 220
 221         spin_lock(&obd->obd_dev_lock);
 222         list_for_each(p, &obd->obd_exports) {
 223                 doomed_exp = list_entry(p, struct obd_export, exp_obd_chain);
 224                 if (obd_uuid_equals(&doomed, &doomed_exp->exp_client_uuid)) {
 225                         class_export_get(doomed_exp);
 226                         break;
 227                 }
 228                 doomed_exp = NULL;
 229         }
 230         spin_unlock(&obd->obd_dev_lock);
 231
 232         if (doomed_exp == NULL) {
 233                 CERROR("can't disconnect %s: no export found\n",
 234                        doomed.uuid);
 235         } else {
 236                 CERROR("evicting %s at adminstrative request\n",
 237                        doomed.uuid);
 238                 ptlrpc_fail_export(doomed_exp);
 239                 class_export_put(doomed_exp);
 240         }
 241         return count;
 242 }
 243
 244 static int lprocfs_mds_wr_config_update(struct file *file, const char *buffer,
 245                                         unsigned long count, void *data)
 246 {
 247         struct obd_device *obd = data;
 248         ENTRY;
 249
 250         RETURN(mds_lov_update_config(obd, 0));
 251 }
 252
 253 struct lprocfs_vars lprocfs_mds_obd_vars[] = {
 254         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 255         { "blocksize",    lprocfs_rd_blksize,     0, 0 },
 256         { "kbytestotal",  lprocfs_rd_kbytestotal, 0, 0 },
 257         { "kbytesfree",   lprocfs_rd_kbytesfree,  0, 0 },
 258         { "kbytesavail",  lprocfs_rd_kbytesavail, 0, 0 },
 259         { "fstype",       lprocfs_rd_fstype,      0, 0 },
 260         { "filestotal",   lprocfs_rd_filestotal,  0, 0 },
 261         { "filesfree",    lprocfs_rd_filesfree,   0, 0 },
 262         { "mntdev",       lprocfs_mds_rd_mntdev,  0, 0 },
 263         { "recovery_status", lprocfs_mds_rd_recovery_status, 0, 0 },
 264         { "evict_client", 0, lprocfs_mds_wr_evict_client, 0 },
 265         { "config_update", 0, lprocfs_mds_wr_config_update, 0 },
 266         { "num_exports",  lprocfs_rd_num_exports, 0, 0 },
 267         { "counters", lprocfs_rd_mds_counters, 0, 0 },
 268         { 0 }
 269 };
 270
 271 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 272         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 273         { 0 }
 274 };
 275
 276 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 277         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 278         { 0 }
 279 };
 280
 281 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 282         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 283         { 0 }
 284 };
 285
 286
 287 #endif
 288
 289 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 290                                                      lprocfs_mds_obd_vars},
 291                                                     {lprocfs_mdt_module_vars,
 292                                                      lprocfs_mdt_obd_vars}};
 293
 294 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 295                         (sizeof(lprocfs_array_vars) /
 296                          sizeof(struct lprocfs_static_vars)))