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Change and generalise struct format_instance for PV and VG use.

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This commit is contained in:
Peter Rajnoha 2011-02-21 12:01:22 +00:00
parent a8d13f9499
commit 716c4ebe52
2 changed files with 44 additions and 0 deletions
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32
lib/metadata/metadata-exported.h
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@ -170,16 +170,48 @@ struct pv_segment {
#define pvseg_is_allocated(pvseg) ((pvseg)->lvseg) #define pvseg_is_allocated(pvseg) ((pvseg)->lvseg)
/*
* These flags define the type of the format instance to be created.
* There are two basic types: a PV-based and a VG-based format instance.
* We can further control the format_instance initialisation and functionality
* by using the other flags. Today, the primary role of the format_instance
* is to temporarily store metadata area information we are working with. More
* flags can be defined to cover even more functionality in the future...
*/
/* PV-based format instance */
#define FMT_INSTANCE_PV 0x00000000U
/* VG-based format instance */
#define FMT_INSTANCE_VG 0x00000001U
/* Include any existing PV mdas during format_instance initialisation */
#define FMT_INSTANCE_MDAS 0x00000002U
/* Include any auxiliary mdas during format_instance intialisation */
#define FMT_INSTANCE_AUX_MDAS 0x00000004U
/* Include any other format-specific mdas during format_instance initialisation */
#define FMT_INSTANCE_PRIVATE_MDAS 0x00000008U
struct format_instance { struct format_instance {
uint32_t type;
const struct format_type *fmt; const struct format_type *fmt;
/* /*
* Each mda in a vg is on exactly one of the below lists. * Each mda in a vg is on exactly one of the below lists.
* MDAs on the 'in_use' list will be read from / written to * MDAs on the 'in_use' list will be read from / written to
* disk, while MDAs on the 'ignored' list will not be read * disk, while MDAs on the 'ignored' list will not be read
* or written to. * or written to.
*/ */
/* FIXME: Try to use the index only. Remove these lists. */
struct dm_list metadata_areas_in_use; struct dm_list metadata_areas_in_use;
struct dm_list metadata_areas_ignored; struct dm_list metadata_areas_ignored;
union {
struct metadata_area **array;
struct dm_hash_table *hash;
} metadata_areas_index;
void *private; void *private;
}; };

12
lib/metadata/metadata.h
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@ -220,6 +220,18 @@ struct seg_list {
struct lv_segment *seg; struct lv_segment *seg;
}; };
struct format_instance_ctx {
uint32_t type;
union {
const char *pv_id;
struct {
const char *vg_name;
const char *vg_id;
} vg_ref;
void *private;
} context;
};
/* /*
* Ownership of objects passes to caller. * Ownership of objects passes to caller.
*/ */