external/gpl2/lvm2/dist/lib/activate/dev_manager.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
   5  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
   6  *
   7  * This file is part of LVM2.
   8  *
   9  * This copyrighted material is made available to anyone wishing to use,
  10  * modify, copy, or redistribute it subject to the terms and conditions
  11  * of the GNU Lesser General Public License v.2.1.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #ifndef _LVM_DEV_MANAGER_H
  19 #define _LVM_DEV_MANAGER_H
  20
  21 #include "metadata-exported.h"
  22
  23 struct logical_volume;
  24 struct volume_group;
  25 struct cmd_context;
  26 struct dev_manager;
  27 struct dm_info;
  28 struct device;
  29
  30 /*
  31  * Constructor and destructor.
  32  */
  33 struct dev_manager *dev_manager_create(struct cmd_context *cmd,
  34                                        const char *vg_name);
  35 void dev_manager_destroy(struct dev_manager *dm);
  36 void dev_manager_release(void);
  37 void dev_manager_exit(void);
  38
  39 /*
  40  * The device handler is responsible for creating all the layered
  41  * dm devices, and ensuring that all constraints are maintained
  42  * (eg, an origin is created before its snapshot, but is not
  43  * unsuspended until the snapshot is also created.)
  44  */
  45 int dev_manager_info(struct dm_pool *mem, const char *name,
  46                      const struct logical_volume *lv,
  47                      int mknodes, int with_open_count, int with_read_ahead,
  48                      struct dm_info *info, uint32_t *read_ahead);
  49 int dev_manager_snapshot_percent(struct dev_manager *dm,
  50                                  const struct logical_volume *lv,
  51                                  float *percent,
  52                                  percent_range_t *percent_range);
  53 int dev_manager_mirror_percent(struct dev_manager *dm,
  54                                struct logical_volume *lv, int wait,
  55                                float *percent, percent_range_t *percent_range,
  56                                uint32_t *event_nr);
  57 int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
  58                         int lockfs, int flush_required);
  59 int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv);
  60 int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv,
  61                         int *flush_required);
  62 int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv);
  63
  64 int dev_manager_lv_mknodes(const struct logical_volume *lv);
  65 int dev_manager_lv_rmnodes(const struct logical_volume *lv);
  66
  67 /*
  68  * Put the desired changes into effect.
  69  */
  70 int dev_manager_execute(struct dev_manager *dm);
  71
  72 int dev_manager_device_uses_vg(struct device *dev,
  73                                struct volume_group *vg);
  74
  75 #endif