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
  35 struct lprocfs_vars lprocfs_mds_obd_vars[]  = { {0} };
  36 struct lprocfs_vars lprocfs_mds_module_vars[] = { {0} };
  37 struct lprocfs_vars lprocfs_mdt_obd_vars[] = { {0} };
  38 struct lprocfs_vars lprocfs_mdt_module_vars[] = { {0} };
  39
  40 #else
  41
  42 static int lprocfs_mds_rd_mntdev(char *page, char **start, off_t off,
  43                                  int count, int *eof, void *data)
  44 {
  45         struct obd_device* obd = (struct obd_device *)data;
  46
  47         LASSERT(obd != NULL);
  48         LASSERT(obd->u.mds.mds_vfsmnt->mnt_devname);
  49         *eof = 1;
  50
  51         return snprintf(page, count, "%s\n",
  52                         obd->u.mds.mds_vfsmnt->mnt_devname);
  53 }
  54
  55 static int lprocfs_mds_wr_evict_client(struct file *file, const char *buffer,
  56                                        unsigned long count, void *data)
  57 {
  58         struct obd_device *obd = data;
  59         struct obd_export *doomed_exp = NULL;
  60         struct obd_uuid doomed;
  61         struct list_head *p;
  62         char tmpbuf[sizeof(doomed)];
  63
  64         sscanf(buffer, "%40s", tmpbuf);
  65         obd_str2uuid(&doomed, tmpbuf);
  66
  67         spin_lock(&obd->obd_dev_lock);
  68         list_for_each(p, &obd->obd_exports) {
  69                 doomed_exp = list_entry(p, struct obd_export, exp_obd_chain);
  70                 if (obd_uuid_equals(&doomed, &doomed_exp->exp_client_uuid)) {
  71                         class_export_get(doomed_exp);
  72                         break;
  73                 }
  74                 doomed_exp = NULL;
  75         }
  76         spin_unlock(&obd->obd_dev_lock);
  77
  78         if (doomed_exp == NULL) {
  79                 CERROR("can't disconnect %s: no export found\n",
  80                        doomed.uuid);
  81         } else {
  82                 CERROR("evicting %s at adminstrative request\n",
  83                        doomed.uuid);
  84                 ptlrpc_fail_export(doomed_exp);
  85                 class_export_put(doomed_exp);
  86         }
  87         return count;
  88 }
  89
  90 static int lprocfs_mds_wr_config_update(struct file *file, const char *buffer,
  91                                         unsigned long count, void *data)
  92 {
  93         struct obd_device *obd = data;
  94         ENTRY;
  95
  96         RETURN(mds_lov_update_config(obd, 0));
  97 }
  98
  99 static int lprocfs_rd_last_fid(char *page, char **start, off_t off,
 100                                int count, int *eof, void *data)
 101 {
 102         struct obd_device *obd = (struct obd_device *)data;
 103         struct mds_obd *mds = &obd->u.mds;
 104         __u64 last_fid;
 105
 106         spin_lock(&mds->mds_last_fid_lock);
 107         last_fid = mds->mds_last_fid;
 108         spin_unlock(&mds->mds_last_fid_lock);
 109
 110         *eof = 1;
 111         return snprintf(page, count, LPD64"\n", last_fid);
 112 }
 113
 114 static int lprocfs_rd_group(char *page, char **start, off_t off,
 115                             int count, int *eof, void *data)
 116 {
 117         struct obd_device *obd = (struct obd_device *)data;
 118         struct mds_obd *mds = &obd->u.mds;
 119
 120         *eof = 1;
 121         return snprintf(page, count, "%lu\n",
 122                         (unsigned long)mds->mds_num);
 123 }
 124
 125 struct lprocfs_vars lprocfs_mds_obd_vars[] = {
 126         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 127         { "blocksize",    lprocfs_rd_blksize,     0, 0 },
 128         { "kbytestotal",  lprocfs_rd_kbytestotal, 0, 0 },
 129         { "kbytesfree",   lprocfs_rd_kbytesfree,  0, 0 },
 130         { "kbytesavail",  lprocfs_rd_kbytesavail, 0, 0 },
 131         { "fstype",       lprocfs_rd_fstype,      0, 0 },
 132         { "filestotal",   lprocfs_rd_filestotal,  0, 0 },
 133         { "filesfree",    lprocfs_rd_filesfree,   0, 0 },
 134         { "mntdev",       lprocfs_mds_rd_mntdev,  0, 0 },
 135         { "last_fid",     lprocfs_rd_last_fid,    0, 0 },
 136         { "group",        lprocfs_rd_group,       0, 0 },
 137         { "recovery_status", lprocfs_obd_rd_recovery_status, 0, 0 },
 138         { "evict_client", 0, lprocfs_mds_wr_evict_client, 0 },
 139         { "config_update", 0, lprocfs_mds_wr_config_update, 0 },
 140         { "num_exports",  lprocfs_rd_num_exports, 0, 0 },
 141         { 0 }
 142 };
 143
 144 /*
 145  * group hash proc entries handler
 146  */
 147 static int lprocfs_wr_group_info(struct file *file, const char *buffer,
 148                                  unsigned long count, void *data)
 149 {
 150         struct {
 151                 int             err;
 152                 uid_t           uid;
 153                 uint32_t        ngroups;
 154                 gid_t          *groups;
 155         } param;
 156         gid_t   gids_local[NGROUPS_SMALL];
 157         gid_t  *gids = NULL;
 158
 159         if (count != sizeof(param)) {
 160                 CERROR("invalid data size %lu\n", count);
 161                 return count;
 162         }
 163         if (copy_from_user(&param, buffer, count)) {
 164                 CERROR("broken downcall\n");
 165                 return count;
 166         }
 167         if (param.ngroups > NGROUPS_MAX) {
 168                 CERROR("%d groups?\n", param.ngroups);
 169                 return count;
 170         }
 171
 172         if (param.ngroups <= NGROUPS_SMALL)
 173                 gids = gids_local;
 174         else {
 175                 OBD_ALLOC(gids, param.ngroups * sizeof(gid_t));
 176                 if (!gids) {
 177                         CERROR("fail to alloc memory for %d gids\n",
 178                                 param.ngroups);
 179                         return count;
 180                 }
 181         }
 182         if (copy_from_user(gids, param.groups,
 183                            param.ngroups * sizeof(gid_t))) {
 184                 CERROR("broken downcall\n");
 185                 goto out;
 186         }
 187
 188         mds_handle_group_downcall(param.err, param.uid,
 189                                   param.ngroups, gids);
 190
 191 out:
 192         if (gids && gids != gids_local)
 193                 OBD_FREE(gids, param.ngroups * sizeof(gid_t));
 194         return count;
 195 }
 196
 197 static int lprocfs_rd_expire(char *page, char **start, off_t off, int count,
 198                              int *eof, void *data)
 199 {
 200         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 201
 202         *eof = 1;
 203         return snprintf(page, count, "%d\n", hash->gh_entry_expire);
 204 }
 205
 206 static int lprocfs_wr_expire(struct file *file, const char *buffer,
 207                              unsigned long count, void *data)
 208 {
 209         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 210         char buf[32];
 211
 212         if (copy_from_user(buf, buffer, min(count, 32UL)))
 213                 return count;
 214         buf[31] = 0;
 215         sscanf(buf, "%d", &hash->gh_entry_expire);
 216         return count;
 217 }
 218
 219 static int lprocfs_rd_ac_expire(char *page, char **start, off_t off, int count,
 220                                 int *eof, void *data)
 221 {
 222         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 223
 224         *eof = 1;
 225         return snprintf(page, count, "%d\n", hash->gh_acquire_expire);
 226 }
 227
 228 static int lprocfs_wr_ac_expire(struct file *file, const char *buffer,
 229                                 unsigned long count, void *data)
 230 {
 231         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 232         char buf[32];
 233
 234         if (copy_from_user(buf, buffer, min(count, 32UL)))
 235                 return count;
 236         buf[31] = 0;
 237         sscanf(buf, "%d", &hash->gh_acquire_expire);
 238         return count;
 239 }
 240
 241 static int lprocfs_rd_hash_upcall(char *page, char **start, off_t off, int count,
 242                                 int *eof, void *data)
 243 {
 244         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 245
 246         *eof = 1;
 247         return snprintf(page, count, "%s\n", hash->gh_upcall);
 248 }
 249
 250 static int lprocfs_wr_hash_upcall(struct file *file, const char *buffer,
 251                                   unsigned long count, void *data)
 252 {
 253         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 254
 255         if (count < MDSGRP_UPCALL_MAXPATH) {
 256                 sscanf(buffer, "%1024s", hash->gh_upcall);
 257                 hash->gh_upcall[MDSGRP_UPCALL_MAXPATH-1] = 0;
 258         }
 259         return count;
 260 }
 261
 262 static int lprocfs_wr_hash_flush(struct file *file, const char *buffer,
 263                                   unsigned long count, void *data)
 264 {
 265         mds_group_hash_flush_idle();
 266         return count;
 267 }
 268
 269 static int lprocfs_rd_allow_setgroups(char *page, char **start, off_t off,
 270                                       int count, int *eof, void *data)
 271 {
 272         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 273
 274         *eof = 1;
 275         return snprintf(page, count, "%d\n", hash->gh_allow_setgroups);
 276 }
 277
 278 static int lprocfs_wr_allow_setgroups(struct file *file, const char *buffer,
 279                                       unsigned long count, void *data)
 280 {
 281         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 282         char buf[8];
 283         int val;
 284
 285         if (copy_from_user(buf, buffer, min(count, 8UL)))
 286                 return count;
 287         buf[7] = 0;
 288         sscanf(buf, "%d", &val);
 289         hash->gh_allow_setgroups = (val != 0);
 290         return count;
 291 }
 292
 293 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 294         { "num_refs", lprocfs_rd_numrefs, 0, 0 },
 295         { "grp_hash_expire_interval",lprocfs_rd_expire,
 296           lprocfs_wr_expire, 0},
 297         { "grp_hash_acquire_expire", lprocfs_rd_ac_expire,
 298           lprocfs_wr_ac_expire, 0},
 299         { "grp_hash_upcall", lprocfs_rd_hash_upcall,
 300           lprocfs_wr_hash_upcall, 0},
 301         { "grp_hash_flush", 0, lprocfs_wr_hash_flush, 0},
 302         { "group_info", 0, lprocfs_wr_group_info, 0 },
 303         { "allow_setgroups", lprocfs_rd_allow_setgroups,
 304           lprocfs_wr_allow_setgroups, 0},
 305         { 0 }
 306 };
 307
 308 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 309         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 310         { 0 }
 311 };
 312
 313 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 314         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 315         { 0 }
 316 };
 317 #endif /* LPROCFS */
 318
 319 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 320                                                      lprocfs_mds_obd_vars},
 321                                                     {lprocfs_mdt_module_vars,
 322                                                      lprocfs_mdt_obd_vars}};
 323
 324 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 325                         (sizeof(lprocfs_array_vars) /
 326                          sizeof(struct lprocfs_static_vars)))