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      1 /*	$NetBSD: activate.h,v 1.1.1.2 2009/12/02 00:25:45 haad Exp $	*/
      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
    116