lib/activate/dev_manager.h

   1 /*
   2  * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
   3  * Copyright (C) 2004-2012 Red Hat, Inc. All rights reserved.
   4  *
   5  * This file is part of LVM2.
   6  *
   7  * This copyrighted material is made available to anyone wishing to use,
   8  * modify, copy, or redistribute it subject to the terms and conditions
   9  * of the GNU Lesser General Public License v.2.1.
  10  *
  11  * You should have received a copy of the GNU Lesser General Public License
  12  * along with this program; if not, write to the Free Software Foundation,
  13  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  14  */
  15
  16 #ifndef _LVM_DEV_MANAGER_H
  17 #define _LVM_DEV_MANAGER_H
  18
  19 #include "metadata-exported.h"
  20
  21 struct logical_volume;
  22 struct lv_activate_opts;
  23 struct volume_group;
  24 struct cmd_context;
  25 struct dev_manager;
  26 struct dm_info;
  27 struct device;
  28
  29 int read_only_lv(struct logical_volume *lv, struct lv_activate_opts *laopts);
  30
  31 /*
  32  * Constructor and destructor.
  33  */
  34 struct dev_manager *dev_manager_create(struct cmd_context *cmd,
  35                                        const char *vg_name,
  36                                        unsigned track_pvmove_deps);
  37 void dev_manager_destroy(struct dev_manager *dm);
  38 void dev_manager_release(void);
  39 void dev_manager_exit(void);
  40
  41 /*
  42  * The device handler is responsible for creating all the layered
  43  * dm devices, and ensuring that all constraints are maintained
  44  * (eg, an origin is created before its snapshot, but is not
  45  * unsuspended until the snapshot is also created.)
  46  */
  47 int dev_manager_info(struct dm_pool *mem, const struct logical_volume *lv,
  48                      const char *layer,
  49                      int with_open_count, int with_read_ahead,
  50                      struct dm_info *info, uint32_t *read_ahead);
  51 int dev_manager_snapshot_percent(struct dev_manager *dm,
  52                                  const struct logical_volume *lv,
  53                                  percent_t *percent);
  54 int dev_manager_mirror_percent(struct dev_manager *dm,
  55                                const struct logical_volume *lv, int wait,
  56                                percent_t *percent, uint32_t *event_nr);
  57 int dev_manager_thin_pool_status(struct dev_manager *dm,
  58                                  const struct logical_volume *lv,
  59                                  struct dm_status_thin_pool **status);
  60 int dev_manager_thin_pool_percent(struct dev_manager *dm,
  61                                   const struct logical_volume *lv,
  62                                   int metadata, percent_t *percent);
  63 int dev_manager_thin_percent(struct dev_manager *dm,
  64                              const struct logical_volume *lv,
  65                              int mapped, percent_t *percent);
  66 int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
  67                         struct lv_activate_opts *laopts, int lockfs, int flush_required);
  68 int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv,
  69                          struct lv_activate_opts *laopts);
  70 int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv,
  71                         struct lv_activate_opts *laopts, int *flush_required);
  72 int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv);
  73 int dev_manager_transient(struct dev_manager *dm, struct logical_volume *lv) __attribute__((nonnull(1, 2)));
  74
  75 int dev_manager_mknodes(const struct logical_volume *lv);
  76
  77 /*
  78  * Put the desired changes into effect.
  79  */
  80 int dev_manager_execute(struct dev_manager *dm);
  81
  82 int dev_manager_device_uses_vg(struct device *dev,
  83                                struct volume_group *vg);
  84
  85 #endif