mirror of
git://sourceware.org/git/lvm2.git
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135 lines
2.8 KiB
C
135 lines
2.8 KiB
C
/*
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* Copyright (C) 2001 Sistina Software
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*
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* This file is released under the GPL.
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*
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* This is the in core representation of a volume group and it's
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* associated physical and logical volumes.
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*/
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#ifndef _LVM_METADATA_H
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#define _LVM_METADATA_H
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#define ID_LEN 32
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struct id {
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uint8_t chars[ID_LEN];
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};
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struct logical_volume;
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struct physical_volume {
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struct id *id;
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struct device *dev;
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char *vg_name;
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uint32_t status;
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uint64_t size;
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/* physical extents */
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uint64_t pe_size;
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uint64_t pe_start;
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uint32_t pe_count;
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uint32_t pe_allocated;
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};
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struct pe_specifier {
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struct physical_volume *pv;
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uint32_t pe;
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};
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struct logical_volume {
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/* disk */
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struct id *id;
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char *name;
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uint32_t access;
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uint32_t status;
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uint32_t open;
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uint64_t size;
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uint32_t le_count;
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/* le -> pe mapping array */
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struct pe_specifier *map;
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};
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struct volume_group {
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struct id *id;
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char *name;
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uint64_t extent_size;
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uint32_t extent_count;
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uint32_t free_count;
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/* physical volumes */
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uint32_t pv_count;
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struct physical_volume **pv;
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/* logical volumes */
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uint32_t lv_count;
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struct logical_volume **lv;
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};
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/* ownership of returned objects passes */
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struct io_space {
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struct str_list *(*get_vgs)(struct io_space *is);
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struct dev_list *(*get_pvs)(struct io_space *is);
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struct physical_volume *read_pv(struct io_space *is,
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struct device *dev);
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int write_pv(struct io_space *is, struct physical_volume *pv);
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struct volume_group *(*read_vg)(struct io_space *is,
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const char *vg_name);
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int (*write_vg)(struct io_space *is, struct volume_group *vg);
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void (*destructor)(struct io_space *is);
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struct device_manager *mgr;
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void *private;
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};
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struct io_space *create_text_format(struct device_manager *mgr,
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const char *text_file);
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struct io_space *create_lvm1_format(struct device_manager *mgr);
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inline struct volume_group *read_vg(struct io_space *f)
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{
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struct dev_list *pvs = f->get_pvs();
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return f->read_vg(pvs);
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}
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inline int write_vg(struct io_object *f, struct volume_group *vg)
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{
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return f->write_vg(vg);
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}
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inline int write_backup(struct io_format *orig, struct io_format *text)
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{
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}
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int id_eq(struct id *op1, struct id *op2);
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struct volume_group *create_vg();
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int destroy_vg(struct volume_group *vg);
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int add_pv(struct volume_group *vg, struct physical_volume *pv);
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struct physical_volume *find_pv(struct volume_group *vg,
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struct physical_volume *pv);
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int add_lv(struct volume_group *vg, struct logical_volume *lv);
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struct logical_volume *find_lv(struct volume_group *vg,
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struct logical_volume *lv);
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struct io_handler {
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struct volume_group *read_vg();
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int write_vg(struct volume_group *vg);
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};
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#endif
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