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Update lvm.h handle and handle list comments.

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Author: Dave Wysochanski <dwysocha@redhat.com>
This commit is contained in:
Dave Wysochanski 2009-07-26 16:11:58 +00:00
parent 4e57aae3a7
commit 5ed9395077
1 changed files with 71 additions and 16 deletions
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87
liblvm/lvm.h
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@ -19,31 +19,92 @@
#include <stdint.h>
/* Internal object structures */
struct volume_group;
/******************************** structures ********************************/
/* Internal object structures - do not use directly */
struct lvm;
struct physical_volume;
struct volume_group;
struct logical_volume;
/* liblvm handles to objects pv, vg, lv, pvseg, lvseg */
typedef struct volume_group vg_t;
/**
* lvm handle.
*
* This is the base handle that is needed to open and create objects. Also
* error handling is bound to this handle.
*/
typedef struct lvm *lvm_t;
/**
* Physical volume object.
*
* This object can be either a read-only object or a read-write object and
* depends on the mode of the volume group. This object can not be
* written to disk independently, and changes will be written to disk
* when the volume group gets committed to disk. The open mode is the
* same as the volume group object it was created from.
*/
typedef struct physical_volume pv_t;
/**
* Volume group object.
*
* This object can be either a read-only object or a read-write object
* depending on the mode it was returned by a function. Create functions
* return a read-write object, but open functions have the argument mode to
* define if the object can be modified or not.
*/
typedef struct volume_group vg_t;
/**
* Logical Volume object.
*
* This object can be either a read-only object or a read-write object
* depending on the mode it was returned by a function. This object can not be
* written to disk independently, it is bound to a volume group and changes
* will be written to disk when the volume group gets committed to disk. The
* open mode is the same as the volume group object is was created of.
*/
typedef struct logical_volume lv_t;
typedef struct lvm_vg_list {
struct dm_list list;
vg_t *vg;
} vg_list_t;
/**
* Physical volume object list.
*
* The properties of physical volume objects also applies to the list of
* physical volumes.
*/
typedef struct lvm_pv_list {
struct dm_list list;
pv_t *pv;
} pv_list_t;
/**
* Volume group object list.
*
* The properties of volume group objects also applies to the list of
* volume groups.
*/
typedef struct lvm_vg_list {
struct dm_list list;
vg_t *vg;
} vg_list_t;
/**
* Logical Volume object list.
*
* The properties of logical volume objects also applies to the list of
* logical volumes.
*/
typedef struct lvm_lv_list {
struct dm_list list;
lv_t *lv;
} lv_list_t;
/**
* String list.
*
* This string list contains read-only strings.
*/
struct lvm_str_list {
struct dm_list list;
const char *str;
@ -56,13 +117,7 @@ struct lvm_str_list {
* If no LVs exist on the given VG, NULL is returned.
*/
struct dm_list *lvm_vg_list_lvs(vg_t *vg);
struct lvm; /* internal data */
/**
* The lvm handle.
*/
typedef struct lvm *lvm_t;
/*************************** generic lvm handling ***************************/
/**
* Create a LVM handle.