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                                unsigned long 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         down(&mds->mds_last_fid_sem);
 107         last_fid = mds->mds_last_fid;
 108         up(&mds->mds_last_fid_sem);
 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                             unsigned long 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, LPD64"\n", mds->mds_num);
 122 }
 123
 124 struct lprocfs_vars lprocfs_mds_obd_vars[] = {
 125         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 126         { "blocksize",    lprocfs_rd_blksize,     0, 0 },
 127         { "kbytestotal",  lprocfs_rd_kbytestotal, 0, 0 },
 128         { "kbytesfree",   lprocfs_rd_kbytesfree,  0, 0 },
 129         { "kbytesavail",  lprocfs_rd_kbytesavail, 0, 0 },
 130         { "fstype",       lprocfs_rd_fstype,      0, 0 },
 131         { "filestotal",   lprocfs_rd_filestotal,  0, 0 },
 132         { "filesfree",    lprocfs_rd_filesfree,   0, 0 },
 133         { "mntdev",       lprocfs_mds_rd_mntdev,  0, 0 },
 134         { "last_fid",     lprocfs_rd_last_fid,    0, 0 },
 135         { "group",        lprocfs_rd_group,       0, 0 },
 136         { "recovery_status", lprocfs_obd_rd_recovery_status, 0, 0 },
 137         { "evict_client", 0, lprocfs_mds_wr_evict_client, 0 },
 138         { "config_update", 0, lprocfs_mds_wr_config_update, 0 },
 139         { "num_exports",  lprocfs_rd_num_exports, 0, 0 },
 140         { 0 }
 141 };
 142
 143 /*
 144  * group hash proc entries handler
 145  */
 146 static int lprocfs_wr_group_info(struct file *file, const char *buffer,
 147                                  unsigned long count, void *data)
 148 {
 149         struct {
 150                 int             err;
 151                 uid_t           uid;
 152                 uint32_t        ngroups;
 153                 gid_t          *groups;
 154         } param;
 155         gid_t   gids_local[NGROUPS_SMALL];
 156         gid_t  *gids = NULL;
 157
 158         if (count != sizeof(param)) {
 159                 CERROR("invalid data size %lu\n", count);
 160                 return count;
 161         }
 162         if (copy_from_user(&param, buffer, count)) {
 163                 CERROR("broken downcall\n");
 164                 return count;
 165         }
 166         if (param.ngroups > NGROUPS_MAX) {
 167                 CERROR("%d groups?\n", param.ngroups);
 168                 return count;
 169         }
 170
 171         if (param.ngroups <= NGROUPS_SMALL)
 172                 gids = gids_local;
 173         else {
 174                 OBD_ALLOC(gids, param.ngroups * sizeof(gid_t));
 175                 if (!gids) {
 176                         CERROR("fail to alloc memory for %d gids\n",
 177                                 param.ngroups);
 178                         return count;
 179                 }
 180         }
 181         if (copy_from_user(gids, param.groups,
 182                            param.ngroups * sizeof(gid_t))) {
 183                 CERROR("broken downcall\n");
 184                 goto out;
 185         }
 186
 187         mds_handle_group_downcall(param.err, param.uid,
 188                                   param.ngroups, gids);
 189
 190 out:
 191         if (gids && gids != gids_local)
 192                 OBD_FREE(gids, param.ngroups * sizeof(gid_t));
 193         return count;
 194 }
 195
 196 static int lprocfs_rd_expire(char *page, char **start, off_t off, int count,
 197                              int *eof, void *data)
 198 {
 199         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 200
 201         *eof = 1;
 202         return snprintf(page, count, "%d\n", hash->gh_entry_expire);
 203 }
 204
 205 static int lprocfs_wr_expire(struct file *file, const char *buffer,
 206                              unsigned long count, void *data)
 207 {
 208         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 209         char buf[32];
 210
 211         if (copy_from_user(buf, buffer, min(count, 32UL)))
 212                 return count;
 213         buf[31] = 0;
 214         sscanf(buf, "%d", &hash->gh_entry_expire);
 215         return count;
 216 }
 217
 218 static int lprocfs_rd_ac_expire(char *page, char **start, off_t off, int count,
 219                                 int *eof, void *data)
 220 {
 221         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 222
 223         *eof = 1;
 224         return snprintf(page, count, "%d\n", hash->gh_acquire_expire);
 225 }
 226
 227 static int lprocfs_wr_ac_expire(struct file *file, const char *buffer,
 228                                 unsigned long count, void *data)
 229 {
 230         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 231         char buf[32];
 232
 233         if (copy_from_user(buf, buffer, min(count, 32UL)))
 234                 return count;
 235         buf[31] = 0;
 236         sscanf(buf, "%d", &hash->gh_acquire_expire);
 237         return count;
 238 }
 239
 240 static int lprocfs_rd_hash_upcall(char *page, char **start, off_t off, int count,
 241                                 int *eof, void *data)
 242 {
 243         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 244
 245         *eof = 1;
 246         return snprintf(page, count, "%s\n", hash->gh_upcall);
 247 }
 248
 249 static int lprocfs_wr_hash_upcall(struct file *file, const char *buffer,
 250                                   unsigned long count, void *data)
 251 {
 252         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 253
 254         if (count < MDSGRP_UPCALL_MAXPATH) {
 255                 sscanf(buffer, "%1024s", hash->gh_upcall);
 256                 hash->gh_upcall[MDSGRP_UPCALL_MAXPATH-1] = 0;
 257         }
 258         return count;
 259 }
 260
 261 static int lprocfs_wr_hash_flush(struct file *file, const char *buffer,
 262                                   unsigned long count, void *data)
 263 {
 264         mds_group_hash_flush_idle();
 265         return count;
 266 }
 267
 268 static int lprocfs_rd_allow_setgroups(char *page, char **start, off_t off,
 269                                       int count, int *eof, void *data)
 270 {
 271         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 272
 273         *eof = 1;
 274         return snprintf(page, count, "%d\n", hash->gh_allow_setgroups);
 275 }
 276
 277 static int lprocfs_wr_allow_setgroups(struct file *file, const char *buffer,
 278                                       unsigned long count, void *data)
 279 {
 280         struct mds_grp_hash *hash = __mds_get_global_group_hash();
 281         char buf[8];
 282         int val;
 283
 284         if (copy_from_user(buf, buffer, min(count, 8UL)))
 285                 return count;
 286         buf[7] = 0;
 287         sscanf(buf, "%d", &val);
 288         hash->gh_allow_setgroups = (val != 0);
 289         return count;
 290 }
 291
 292 struct lprocfs_vars lprocfs_mds_module_vars[] = {
 293         { "num_refs", lprocfs_rd_numrefs, 0, 0 },
 294         { "grp_hash_expire_interval",lprocfs_rd_expire,
 295           lprocfs_wr_expire, 0},
 296         { "grp_hash_acquire_expire", lprocfs_rd_ac_expire,
 297           lprocfs_wr_ac_expire, 0},
 298         { "grp_hash_upcall", lprocfs_rd_hash_upcall,
 299           lprocfs_wr_hash_upcall, 0},
 300         { "grp_hash_flush", 0, lprocfs_wr_hash_flush, 0},
 301         { "group_info", 0, lprocfs_wr_group_info, 0 },
 302         { "allow_setgroups", lprocfs_rd_allow_setgroups,
 303           lprocfs_wr_allow_setgroups, 0},
 304         { 0 }
 305 };
 306
 307 struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
 308         { "uuid",         lprocfs_rd_uuid,        0, 0 },
 309         { 0 }
 310 };
 311
 312 struct lprocfs_vars lprocfs_mdt_module_vars[] = {
 313         { "num_refs",     lprocfs_rd_numrefs,     0, 0 },
 314         { 0 }
 315 };
 316 #endif /* LPROCFS */
 317
 318 struct lprocfs_static_vars lprocfs_array_vars[] = { {lprocfs_mds_module_vars,
 319                                                      lprocfs_mds_obd_vars},
 320                                                     {lprocfs_mdt_module_vars,
 321                                                      lprocfs_mdt_obd_vars}};
 322
 323 LPROCFS_INIT_MULTI_VARS(lprocfs_array_vars,
 324                         (sizeof(lprocfs_array_vars) /
 325                          sizeof(struct lprocfs_static_vars)))