source3/modules/onefs_config.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Support for OneFS
   4  *
   5  * Copyright (C) Todd Stecher, 2009
   6  * Copyright (C) Tim Prouty, 2009
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "onefs_config.h"
  25
  26 #include <ifs/ifs_syscalls.h>
  27
  28 #define ONEFS_DATA_FASTBUF      10
  29
  30 struct onefs_vfs_share_config vfs_share_config[ONEFS_DATA_FASTBUF];
  31 struct onefs_vfs_share_config *pvfs_share_config;
  32
  33 static void onefs_load_faketimestamp_config(struct connection_struct *conn,
  34                                             struct onefs_vfs_share_config *cfg)
  35 {
  36         const char **parm;
  37         int snum = SNUM(conn);
  38
  39         parm = lp_parm_string_list(snum, PARM_ONEFS_TYPE, PARM_ATIME_NOW,
  40                                    PARM_ATIME_NOW_DEFAULT);
  41
  42         if (parm) {
  43                 cfg->init_flags |= ONEFS_VFS_CONFIG_FAKETIMESTAMPS;
  44                 set_namearray(&cfg->atime_now_list,*parm);
  45         }
  46
  47         parm = lp_parm_string_list(snum, PARM_ONEFS_TYPE, PARM_CTIME_NOW,
  48                                    PARM_CTIME_NOW_DEFAULT);
  49
  50         if (parm) {
  51                 cfg->init_flags |= ONEFS_VFS_CONFIG_FAKETIMESTAMPS;
  52                 set_namearray(&cfg->ctime_now_list,*parm);
  53         }
  54
  55         parm = lp_parm_string_list(snum, PARM_ONEFS_TYPE, PARM_MTIME_NOW,
  56                                    PARM_MTIME_NOW_DEFAULT);
  57
  58         if (parm) {
  59                 cfg->init_flags |= ONEFS_VFS_CONFIG_FAKETIMESTAMPS;
  60                 set_namearray(&cfg->mtime_now_list,*parm);
  61         }
  62
  63         parm = lp_parm_string_list(snum, PARM_ONEFS_TYPE, PARM_ATIME_STATIC,
  64                                    PARM_ATIME_STATIC_DEFAULT);
  65
  66         if (parm) {
  67                 cfg->init_flags |= ONEFS_VFS_CONFIG_FAKETIMESTAMPS;
  68                 set_namearray(&cfg->atime_static_list,*parm);
  69         }
  70
  71         parm = lp_parm_string_list(snum, PARM_ONEFS_TYPE, PARM_MTIME_STATIC,
  72                                    PARM_MTIME_STATIC_DEFAULT);
  73
  74         if (parm) {
  75                 cfg->init_flags |= ONEFS_VFS_CONFIG_FAKETIMESTAMPS;
  76                 set_namearray(&cfg->mtime_static_list,*parm);
  77         }
  78
  79         cfg->atime_slop = lp_parm_int(snum, PARM_ONEFS_TYPE, PARM_ATIME_SLOP,
  80                                       PARM_ATIME_SLOP_DEFAULT);
  81         cfg->ctime_slop = lp_parm_int(snum, PARM_ONEFS_TYPE, PARM_CTIME_SLOP,
  82                                       PARM_CTIME_SLOP_DEFAULT);
  83         cfg->mtime_slop = lp_parm_int(snum, PARM_ONEFS_TYPE, PARM_MTIME_SLOP,
  84                                       PARM_MTIME_SLOP_DEFAULT);
  85 }
  86
  87 /**
  88  * Set onefs-specific vfs global config parameters.
  89  *
  90  * Since changes in these parameters require calling syscalls, we only want to
  91  * call them when the configuration actually changes.
  92  */
  93 static void onefs_load_global_config(connection_struct *conn)
  94 {
  95         static struct onefs_vfs_global_config global_config;
  96         bool dot_snap_child_accessible;
  97         bool dot_snap_child_visible;
  98         bool dot_snap_root_accessible;
  99         bool dot_snap_root_visible;
 100         bool dot_snap_tilde;
 101         bool reconfig_dso = false;
 102         bool reconfig_tilde = false;
 103
 104         /* Check if this is the first time setting the config options. */
 105         if (!(global_config.init_flags & ONEFS_VFS_CONFIG_INITIALIZED)) {
 106                 global_config.init_flags |= ONEFS_VFS_CONFIG_INITIALIZED;
 107
 108                 /* Set process encoding */
 109                 onefs_sys_config_enc();
 110
 111                 reconfig_dso = true;
 112                 reconfig_tilde = true;
 113         }
 114
 115         /* Get the dot snap options from the conf. */
 116         dot_snap_child_accessible =
 117             lp_parm_bool(SNUM(conn), PARM_ONEFS_TYPE,
 118                          PARM_DOT_SNAP_CHILD_ACCESSIBLE,
 119                          PARM_DOT_SNAP_CHILD_ACCESSIBLE_DEFAULT);
 120         dot_snap_child_visible =
 121             lp_parm_bool(SNUM(conn), PARM_ONEFS_TYPE,
 122                          PARM_DOT_SNAP_CHILD_VISIBLE,
 123                          PARM_DOT_SNAP_CHILD_VISIBLE_DEFAULT);
 124         dot_snap_root_accessible =
 125             lp_parm_bool(SNUM(conn), PARM_ONEFS_TYPE,
 126                          PARM_DOT_SNAP_ROOT_ACCESSIBLE,
 127                          PARM_DOT_SNAP_ROOT_ACCESSIBLE_DEFAULT);
 128         dot_snap_root_visible =
 129             lp_parm_bool(SNUM(conn), PARM_ONEFS_TYPE,
 130                          PARM_DOT_SNAP_ROOT_VISIBLE,
 131                          PARM_DOT_SNAP_ROOT_VISIBLE_DEFAULT);
 132         dot_snap_tilde =
 133             lp_parm_bool(SNUM(conn), PARM_ONEFS_TYPE,
 134                          PARM_DOT_SNAP_TILDE,
 135                          PARM_DOT_SNAP_TILDE_DEFAULT);
 136
 137         /* Check if any of the dot snap options need updating. */
 138         if (dot_snap_child_accessible !=
 139             global_config.dot_snap_child_accessible) {
 140                 global_config.dot_snap_child_accessible =
 141                     dot_snap_child_accessible;
 142                 reconfig_dso = true;
 143         }
 144         if (dot_snap_child_visible !=
 145             global_config.dot_snap_child_visible) {
 146                 global_config.dot_snap_child_visible =
 147                     dot_snap_child_visible;
 148                 reconfig_dso = true;
 149         }
 150         if (dot_snap_root_accessible !=
 151             global_config.dot_snap_root_accessible) {
 152                 global_config.dot_snap_root_accessible =
 153                     dot_snap_root_accessible;
 154                 reconfig_dso = true;
 155         }
 156         if (dot_snap_root_visible !=
 157             global_config.dot_snap_root_visible) {
 158                 global_config.dot_snap_root_visible =
 159                     dot_snap_root_visible;
 160                 reconfig_dso = true;
 161         }
 162         if (dot_snap_tilde != global_config.dot_snap_tilde) {
 163                 global_config.dot_snap_tilde = dot_snap_tilde;
 164                 reconfig_tilde = true;
 165         }
 166
 167         /* If a dot snap option has changed update the process.  */
 168         if (reconfig_dso) {
 169                 onefs_sys_config_snap_opt(&global_config);
 170         }
 171
 172         /* If the dot snap tilde option has changed update the process.  */
 173         if (reconfig_tilde) {
 174                 onefs_sys_config_tilde(&global_config);
 175         }
 176 }
 177
 178 int onefs_load_config(connection_struct *conn)
 179 {
 180         int snum = SNUM(conn);
 181         int share_count = lp_numservices();
 182
 183         /* Share config */
 184         if (!pvfs_share_config) {
 185
 186                 if (share_count <= ONEFS_DATA_FASTBUF)
 187                         pvfs_share_config = vfs_share_config;
 188                 else {
 189                         pvfs_share_config =
 190                             SMB_MALLOC_ARRAY(struct onefs_vfs_share_config,
 191                                              share_count);
 192                         if (!pvfs_share_config) {
 193                                 errno = ENOMEM;
 194                                 return -1;
 195                         }
 196
 197                         memset(pvfs_share_config, 0,
 198                             (sizeof(struct onefs_vfs_share_config) *
 199                                     share_count));
 200                 }
 201         }
 202
 203         if ((pvfs_share_config[snum].init_flags &
 204                 ONEFS_VFS_CONFIG_INITIALIZED) == 0) {
 205                         pvfs_share_config[snum].init_flags =
 206                             ONEFS_VFS_CONFIG_INITIALIZED;
 207                         onefs_load_faketimestamp_config(conn,
 208                                                         &pvfs_share_config[snum]);
 209         }
 210
 211         /* Global config */
 212         onefs_load_global_config(conn);
 213
 214         return 0;
 215 }
 216
 217 bool onefs_get_config(int snum, int config_type,
 218                       struct onefs_vfs_share_config *cfg)
 219 {
 220         if ((pvfs_share_config != NULL) &&
 221             (pvfs_share_config[snum].init_flags & config_type))
 222                 *cfg = pvfs_share_config[snum];
 223         else
 224                 return false;
 225
 226         return true;
 227 }
 228
 229
 230 /**
 231  * Set the per-process encoding, ignoring errors.
 232  */
 233 void onefs_sys_config_enc(void)
 234 {
 235         int ret;
 236
 237         ret = enc_set_proc(ENC_UTF8);
 238         if (ret) {
 239                 DEBUG(0, ("Setting process encoding failed: %s\n",
 240                         strerror(errno)));
 241         }
 242 }
 243
 244 /**
 245  * Set the per-process .snpashot directory options, ignoring errors.
 246  */
 247 void onefs_sys_config_snap_opt(struct onefs_vfs_global_config *global_config)
 248 {
 249         struct ifs_dotsnap_options dso;
 250         int ret;
 251
 252         dso.per_proc = 1;
 253         dso.sub_accessible = global_config->dot_snap_child_accessible;
 254         dso.sub_visible = global_config->dot_snap_child_visible;
 255         dso.root_accessible = global_config->dot_snap_root_accessible;
 256         dso.root_visible = global_config->dot_snap_root_visible;
 257
 258         ret = ifs_set_dotsnap_options(&dso);
 259         if (ret) {
 260                 DEBUG(0, ("Setting snapshot visibility/accessibility "
 261                         "failed: %s\n", strerror(errno)));
 262         }
 263 }
 264
 265 /**
 266  * Set the per-process flag saying whether or not to accept ~snapshot
 267  * as an alternative name for .snapshot directories.
 268  */
 269 void onefs_sys_config_tilde(struct onefs_vfs_global_config *global_config)
 270 {
 271         int ret;
 272
 273         ret = ifs_tilde_snapshot(global_config->dot_snap_tilde);
 274         if (ret) {
 275                 DEBUG(0, ("Setting snapshot tilde failed: %s\n",
 276                         strerror(errno)));
 277         }
 278 }