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_dt_update_config(obd, 0));
  97 }
  98
  99 static int lprocfs_rd_filesopen(char *page, char **start, off_t off,
 100                                 int count, int *eof, void *data)
 101 {
 102         struct obd_device *obd = data;
 103         LASSERT(obd != NULL);
 104         *eof = 1;
 105
 106         return snprintf(page, count, "%d\n",
 107                         atomic_read(&obd->u.mds.mds_open_count));
 108 }
 109
 110 static int lprocfs_rd_last_fid(char *page, char **start, off_t off,
 111                                int count, int *eof, void *data)
 112 {
 113         struct obd_device *obd = (struct obd_device *)data;
 114         struct mds_obd *mds = &obd->u.mds;
 115         __u64 last_fid;
 116
 117         spin_lock(&mds->mds_last_fid_lock);
 118         last_fid = mds->mds_last_fid;
 119         spin_unlock(&mds->mds_last_fid_lock);
 120
 121         *eof = 1;
 122         return snprintf(page, count, LPD64"\n", last_fid);
 123 }
 124
 125 static int lprocfs_rd_group(char *page, char **start, off_t off,
 126                             int count, int *eof, void *data)
 127 {
 128         struct obd_device *obd = (struct obd_device *)data;
 129         struct mds_obd *mds = &obd->u.mds;
 130
 131         *eof = 1;
 132         return snprintf(page, count, "%lu\n",
 133                         (unsigned long)mds->mds_num);
 134 }
 135
 136 struct lprocfs_vars lprocfs_mds_obd_vars[] = {
 137         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 138         { "blocksize",    lprocfs_rd_blksize,     0, 0 },
 139         { "kbytestotal",  lprocfs_rd_kbytestotal, 0, 0 },
 140         { "kbytesfree",   lprocfs_rd_kbytesfree,  0, 0 },
 141         { "kbytesavail",  lprocfs_rd_kbytesavail, 0, 0 },
 142         { "fstype",       lprocfs_rd_fstype,      0, 0 },
 143         { "filestotal",   lprocfs_rd_filestotal,  0, 0 },
 144         { "filesfree",    lprocfs_rd_filesfree,   0, 0 },
 145         { "filesopen",    lprocfs_rd_filesopen,   0, 0 },
 146         { "mntdev",       lprocfs_mds_rd_mntdev,  0, 0 },
 147         { "last_fid",     lprocfs_rd_last_fid,    0, 0 },
 148         { "group",        lprocfs_rd_group,       0, 0 },
 149         { "recovery_status", lprocfs_obd_rd_recovery_status, 0, 0 },
 150         { "evict_client", 0, lprocfs_mds_wr_evict_client, 0 },
 151         { "config_update", 0, lprocfs_mds_wr_config_update, 0 },
 152         { "num_exports",  lprocfs_rd_num_exports, 0, 0 },
 153         { 0 }
 154 };
 155
 156 /*
 157  * LSD proc entry handlers
 158  */
 159 static int lprocfs_wr_lsd_downcall(struct file *file, const char *buffer,
 160                                    unsigned long count, void *data)
 161 {
 162         struct upcall_cache *cache = __mds_get_global_lsd_cache();
 163         struct lsd_downcall_args param;
 164         gid_t   gids_local[NGROUPS_SMALL];
 165         gid_t  *gids = NULL;
 166
 167         if (count != sizeof(param)) {
 168                 CERROR("invalid data size %lu\n", count);
 169                 goto do_err_downcall;
 170         }
 171         if (copy_from_user(&param, buffer, count)) {
 172                 CERROR("broken downcall\n");
 173                 goto do_err_downcall;
 174         }
 175
 176         if (param.err) {
 177                 CERROR("LSD downcall indicate error %d\n", param.err);
 178                 goto do_downcall;
 179         }
 180
 181         if (param.ngroups > NGROUPS_MAX) {
 182                 CERROR("%d groups too big\n", param.ngroups);
 183                 goto do_err_downcall;
 184         }
 185
 186         if (param.ngroups <= NGROUPS_SMALL)
 187                 gids = gids_local;
 188         else {
 189                 OBD_ALLOC(gids, param.ngroups * sizeof(gid_t));
 190                 if (!gids) {
 191                         CERROR("fail to alloc memory for %d gids\n",
 192                                 param.ngroups);
 193                         goto do_err_downcall;
 194                 }
 195         }
 196         if (copy_from_user(gids, param.groups,
 197                            param.ngroups * sizeof(gid_t))) {
 198                 CERROR("broken downcall\n");
 199                 goto do_err_downcall;
 200         }
 201
 202         param.groups = gids;
 203
 204 do_downcall:
 205         upcall_cache_downcall(cache, (__u64) param.uid, &param);
 206
 207         if (gids && gids != gids_local)
 208                 OBD_FREE(gids, param.ngroups * sizeof(gid_t));
 209         return count;
 210
 211 do_err_downcall:
 212         param.err = -EINVAL;
 213         goto do_downcall;
 214 }
 215
 216 static int lprocfs_rd_lsd_expire(char *page, char **start, off_t off, int count,
 217                                  int *eof, void *data)
 218 {
 219         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 220
 221         *eof = 1;
 222         return snprintf(page, count, "%lu\n", cache->uc_entry_expire);
 223 }
 224 static int lprocfs_wr_lsd_expire(struct file *file, const char *buffer,
 225                                  unsigned long count, void *data)
 226 {
 227         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 228         char buf[32];
 229
 230         if (copy_from_user(buf, buffer, min(count, 32UL)))
 231                 return count;
 232         buf[31] = 0;
 233         sscanf(buf, "%lu", &cache->uc_entry_expire);
 234         return count;
 235 }
 236
 237 static int lprocfs_rd_lsd_ac_expire(char *page, char **start, off_t off,
 238                                     int count, int *eof, void *data)
 239 {
 240         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 241
 242         *eof = 1;
 243         return snprintf(page, count, "%lu\n", cache->uc_acquire_expire);
 244 }
 245 static int lprocfs_wr_lsd_ac_expire(struct file *file, const char *buffer,
 246                                     unsigned long count, void *data)
 247 {
 248         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 249         char buf[32];
 250
 251         if (copy_from_user(buf, buffer, min(count, 32UL)))
 252                 return count;
 253         buf[31] = 0;
 254         sscanf(buf, "%lu", &cache->uc_acquire_expire);
 255         return count;
 256 }
 257
 258 static int lprocfs_rd_lsd_upcall(char *page, char **start, off_t off, int count,
 259                                  int *eof, void *data)
 260 {
 261         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 262
 263         *eof = 1;
 264         return snprintf(page, count, "%s\n", cache->uc_upcall);
 265 }
 266 static int lprocfs_wr_lsd_upcall(struct file *file, const char *buffer,
 267                                  unsigned long count, void *data)
 268 {
 269         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 270
 271         if (count < UC_CACHE_UPCALL_MAXPATH) {
 272                 sscanf(buffer, "%1024s", cache->uc_upcall);
 273                 cache->uc_upcall[UC_CACHE_UPCALL_MAXPATH - 1] = 0;
 274         }
 275         return count;
 276 }
 277
 278 extern void lgss_svc_cache_flush(__u32 uid);
 279 static int lprocfs_wr_lsd_flush(struct file *file, const char *buffer,
 280                                 unsigned long count, void *data)
 281 {
 282         char buf[32];
 283         __u32 uid;
 284
 285         if (copy_from_user(buf, buffer, min(count, 32UL)))
 286                 return count;
 287         buf[31] = 0;
 288         sscanf(buf, "%d", &uid);
 289
 290         mds_flush_lsd(uid);
 291 #ifdef ENABLE_GSS
 292         lgss_svc_cache_flush(uid);
 293 #endif
 294         return count;
 295 }
 296
 297 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 298         { "num_refs",                   lprocfs_rd_numrefs, 0, 0 },
 299         /* LSD stuff */
 300         { "lsd_expire_interval",        lprocfs_rd_lsd_expire,
 301                                         lprocfs_wr_lsd_expire, 0},
 302         { "lsd_acquire_expire",         lprocfs_rd_lsd_ac_expire,
 303                                         lprocfs_wr_lsd_ac_expire, 0},
 304         { "lsd_upcall",                 lprocfs_rd_lsd_upcall,
 305                                         lprocfs_wr_lsd_upcall, 0},
 306         { "lsd_flush",                  0, lprocfs_wr_lsd_flush, 0},
 307         { "lsd_downcall",               0, lprocfs_wr_lsd_downcall, 0},
 308         { 0 }
 309 };
 310
 311 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 312         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 313         { 0 }
 314 };
 315
 316 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 317         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 318         { 0 }
 319 };
 320 #endif /* LPROCFS */
 321
 322 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 323                                                      lprocfs_mds_obd_vars},
 324                                                     {lprocfs_mdt_module_vars,
 325                                                      lprocfs_mdt_obd_vars}};
 326
 327 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 328                         (sizeof(lprocfs_array_vars) /
 329                          sizeof(struct lprocfs_static_vars)))