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_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  * LSD proc entry handlers
 146  */
 147 static int lprocfs_wr_lsd_downcall(struct file *file, const char *buffer,
 148                                    unsigned long count, void *data)
 149 {
 150         struct upcall_cache *cache = __mds_get_global_lsd_cache();
 151         struct lsd_downcall_args param;
 152         gid_t   gids_local[NGROUPS_SMALL];
 153         gid_t  *gids = NULL;
 154
 155         if (count != sizeof(param)) {
 156                 CERROR("invalid data size %lu\n", count);
 157                 return count;
 158         }
 159         if (copy_from_user(&param, buffer, count)) {
 160                 CERROR("broken downcall\n");
 161                 return count;
 162         }
 163
 164         if (param.err) {
 165                 CERROR("LSD downcall indicate error %d\n", param.err);
 166                 goto do_downcall;
 167         }
 168
 169         if (param.ngroups > NGROUPS_MAX) {
 170                 CERROR("%d groups?\n", param.ngroups);
 171                 param.err = -EINVAL;
 172                 goto do_downcall;
 173         }
 174
 175         if (param.ngroups <= NGROUPS_SMALL)
 176                 gids = gids_local;
 177         else {
 178                 OBD_ALLOC(gids, param.ngroups * sizeof(gid_t));
 179                 if (!gids) {
 180                         CERROR("fail to alloc memory for %d gids\n",
 181                                 param.ngroups);
 182                         param.err = -ENOMEM;
 183                         goto do_downcall;
 184                 }
 185         }
 186         if (copy_from_user(gids, param.groups,
 187                            param.ngroups * sizeof(gid_t))) {
 188                 CERROR("broken downcall\n");
 189                 param.err = -EFAULT;
 190                 goto do_downcall;
 191         }
 192
 193         param.groups = gids;
 194
 195 do_downcall:
 196         upcall_cache_downcall(cache, (__u64) param.uid, param.err, &param);
 197
 198         if (gids && gids != gids_local)
 199                 OBD_FREE(gids, param.ngroups * sizeof(gid_t));
 200         return count;
 201 }
 202
 203 static int lprocfs_rd_lsd_expire(char *page, char **start, off_t off, int count,
 204                                  int *eof, void *data)
 205 {
 206         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 207
 208         *eof = 1;
 209         return snprintf(page, count, "%lu\n", cache->uc_entry_expire);
 210 }
 211 static int lprocfs_wr_lsd_expire(struct file *file, const char *buffer,
 212                                  unsigned long count, void *data)
 213 {
 214         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 215         char buf[32];
 216
 217         if (copy_from_user(buf, buffer, min(count, 32UL)))
 218                 return count;
 219         buf[31] = 0;
 220         sscanf(buf, "%lu", &cache->uc_entry_expire);
 221         return count;
 222 }
 223
 224 static int lprocfs_rd_lsd_ac_expire(char *page, char **start, off_t off,
 225                                     int count, int *eof, void *data)
 226 {
 227         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 228
 229         *eof = 1;
 230         return snprintf(page, count, "%lu\n", cache->uc_acquire_expire);
 231 }
 232 static int lprocfs_wr_lsd_ac_expire(struct file *file, const char *buffer,
 233                                     unsigned long count, void *data)
 234 {
 235         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 236         char buf[32];
 237
 238         if (copy_from_user(buf, buffer, min(count, 32UL)))
 239                 return count;
 240         buf[31] = 0;
 241         sscanf(buf, "%lu", &cache->uc_acquire_expire);
 242         return count;
 243 }
 244
 245 static int lprocfs_rd_lsd_upcall(char *page, char **start, off_t off, int count,
 246                                  int *eof, void *data)
 247 {
 248         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 249
 250         *eof = 1;
 251         return snprintf(page, count, "%s\n", cache->uc_upcall);
 252 }
 253 static int lprocfs_wr_lsd_upcall(struct file *file, const char *buffer,
 254                                  unsigned long count, void *data)
 255 {
 256         struct upcall_cache *cache= __mds_get_global_lsd_cache();
 257
 258         if (count < UC_CACHE_UPCALL_MAXPATH) {
 259                 sscanf(buffer, "%1024s", cache->uc_upcall);
 260                 cache->uc_upcall[UC_CACHE_UPCALL_MAXPATH - 1] = 0;
 261         }
 262         return count;
 263 }
 264
 265 extern void lgss_svc_cache_flush(__u32 uid);
 266 static int lprocfs_wr_lsd_flush(struct file *file, const char *buffer,
 267                                 unsigned long count, void *data)
 268 {
 269         char buf[32];
 270         __u32 uid;
 271
 272         if (copy_from_user(buf, buffer, min(count, 32UL)))
 273                 return count;
 274         buf[31] = 0;
 275         sscanf(buf, "%d", &uid);
 276
 277         mds_flush_lsd(uid);
 278 #ifdef ENABLE_GSS
 279         lgss_svc_cache_flush(uid);
 280 #endif
 281         return count;
 282 }
 283
 284 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 285         { "num_refs",                   lprocfs_rd_numrefs, 0, 0 },
 286         /* LSD stuff */
 287         { "lsd_expire_interval",        lprocfs_rd_lsd_expire,
 288                                         lprocfs_wr_lsd_expire, 0},
 289         { "lsd_acquire_expire",         lprocfs_rd_lsd_ac_expire,
 290                                         lprocfs_wr_lsd_ac_expire, 0},
 291         { "lsd_upcall",                 lprocfs_rd_lsd_upcall,
 292                                         lprocfs_wr_lsd_upcall, 0},
 293         { "lsd_flush",                  0, lprocfs_wr_lsd_flush, 0},
 294         { "lsd_downcall",               0, lprocfs_wr_lsd_downcall, 0},
 295         { 0 }
 296 };
 297
 298 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 299         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 300         { 0 }
 301 };
 302
 303 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 304         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 305         { 0 }
 306 };
 307 #endif /* LPROCFS */
 308
 309 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 310                                                      lprocfs_mds_obd_vars},
 311                                                     {lprocfs_mdt_module_vars,
 312                                                      lprocfs_mdt_obd_vars}};
 313
 314 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 315                         (sizeof(lprocfs_array_vars) /
 316                          sizeof(struct lprocfs_static_vars)))