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

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   5  * Copyright (C) 2004-2007 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_ACTIVATE_H
  19 #define LVM_ACTIVATE_H
  20
  21 #include "metadata-exported.h"
  22
  23 struct lvinfo {
  24         int exists;
  25         int suspended;
  26         unsigned int open_count;
  27         int major;
  28         int minor;
  29         int read_only;
  30         int live_table;
  31         int inactive_table;
  32         uint32_t read_ahead;
  33 };
  34
  35 /* target attribute flags */
  36 #define MIRROR_LOG_CLUSTERED    0x00000001U
  37
  38 void set_activation(int activation);
  39 int activation(void);
  40
  41 int driver_version(char *version, size_t size);
  42 int library_version(char *version, size_t size);
  43 int lvm1_present(struct cmd_context *cmd);
  44
  45 int module_present(struct cmd_context *cmd, const char *target_name);
  46 int target_present(struct cmd_context *cmd, const char *target_name,
  47                    int use_modprobe);
  48 int target_version(const char *target_name, uint32_t *maj,
  49                    uint32_t *min, uint32_t *patchlevel);
  50 int list_segment_modules(struct dm_pool *mem, const struct lv_segment *seg,
  51                          struct dm_list *modules);
  52 int list_lv_modules(struct dm_pool *mem, const struct logical_volume *lv,
  53                     struct dm_list *modules);
  54
  55 void activation_release(void);
  56 void activation_exit(void);
  57
  58 int lv_suspend(struct cmd_context *cmd, const char *lvid_s);
  59 int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s);
  60 int lv_resume(struct cmd_context *cmd, const char *lvid_s);
  61 int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s);
  62 int lv_activate(struct cmd_context *cmd, const char *lvid_s, int exclusive);
  63 int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s,
  64                             int exclusive);
  65 int lv_deactivate(struct cmd_context *cmd, const char *lvid_s);
  66
  67 int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv);
  68
  69 /*
  70  * Returns 1 if info structure has been populated, else 0.
  71  */
  72 int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, struct lvinfo *info,
  73             int with_open_count, int with_read_ahead);
  74 int lv_info_by_lvid(struct cmd_context *cmd, const char *lvid_s,
  75                     struct lvinfo *info, int with_open_count, int with_read_ahead);
  76
  77 /*
  78  * Returns 1 if activate_lv has been set: 1 = activate; 0 = don't.
  79  */
  80 int lv_activation_filter(struct cmd_context *cmd, const char *lvid_s,
  81                          int *activate_lv);
  82
  83 /*
  84  * Returns 1 if percent has been set, else 0.
  85  */
  86 int lv_snapshot_percent(const struct logical_volume *lv, float *percent,
  87                         percent_range_t *percent_range);
  88 int lv_mirror_percent(struct cmd_context *cmd, struct logical_volume *lv,
  89                       int wait, float *percent, percent_range_t *percent_range,
  90                       uint32_t *event_nr);
  91
  92 /*
  93  * Return number of LVs in the VG that are active.
  94  */
  95 int lvs_in_vg_activated(struct volume_group *vg);
  96 int lvs_in_vg_activated_by_uuid_only(struct volume_group *vg);
  97 int lvs_in_vg_opened(const struct volume_group *vg);
  98
  99 int lv_is_active(struct logical_volume *lv);
 100
 101 int monitor_dev_for_events(struct cmd_context *cmd,
 102                             struct logical_volume *lv, int do_reg);
 103
 104 /*
 105  * Returns 1 if PV has a dependency tree that uses anything in VG.
 106  */
 107 int pv_uses_vg(struct physical_volume *pv,
 108                struct volume_group *vg);
 109
 110 /*
 111  * Returns 1 if mapped device is not suspended.
 112  */
 113 int device_is_usable(dev_t dev);
 114
 115 #endif