diff options
Diffstat (limited to 'lib/cache/lvmcache.h')
| -rw-r--r-- | lib/cache/lvmcache.h | 110 |
1 files changed, 69 insertions, 41 deletions
diff --git a/lib/cache/lvmcache.h b/lib/cache/lvmcache.h index 06838dc..615f466 100644 --- a/lib/cache/lvmcache.h +++ b/lib/cache/lvmcache.h @@ -24,45 +24,23 @@ #define ORPHAN_PREFIX VG_ORPHANS #define ORPHAN_VG_NAME(fmt) ORPHAN_PREFIX "_" fmt -#define CACHE_INVALID 0x00000001 -#define CACHE_LOCKED 0x00000002 - /* LVM specific per-volume info */ /* Eventual replacement for struct physical_volume perhaps? */ struct cmd_context; struct format_type; struct volume_group; +struct physical_volume; +struct dm_config_tree; +struct format_instance; +struct metadata_area; +struct disk_locn; -/* One per VG */ -struct lvmcache_vginfo { - struct dm_list list; /* Join these vginfos together */ - struct dm_list infos; /* List head for lvmcache_infos */ - const struct format_type *fmt; - char *vgname; /* "" == orphan */ - uint32_t status; - char vgid[ID_LEN + 1]; - char _padding[7]; - struct lvmcache_vginfo *next; /* Another VG with same name? */ - char *creation_host; - char *vgmetadata; /* Copy of VG metadata as format_text string */ - unsigned precommitted; /* Is vgmetadata live or precommitted? */ -}; - -/* One per device */ -struct lvmcache_info { - struct dm_list list; /* Join VG members together */ - struct dm_list mdas; /* list head for metadata areas */ - struct dm_list das; /* list head for data areas */ - struct lvmcache_vginfo *vginfo; /* NULL == unknown */ - struct label *label; - const struct format_type *fmt; - struct device *dev; - uint64_t device_size; /* Bytes */ - uint32_t status; -}; +struct lvmcache_vginfo; int lvmcache_init(void); +void lvmcache_allow_reads_with_lvmetad(void); + void lvmcache_destroy(struct cmd_context *cmd, int retain_orphans); /* Set full_scan to 1 to reread every filtered device label or @@ -88,19 +66,26 @@ void lvmcache_unlock_vgname(const char *vgname); int lvmcache_verify_lock_order(const char *vgname); /* Queries */ -const struct format_type *fmt_from_vgname(const char *vgname, const char *vgid, unsigned revalidate_labels); -struct lvmcache_vginfo *vginfo_from_vgname(const char *vgname, +const struct format_type *lvmcache_fmt_from_vgname(struct cmd_context *cmd, const char *vgname, const char *vgid, unsigned revalidate_labels); + +/* Decrement and test if there are still vg holders in vginfo. */ +int lvmcache_vginfo_holders_dec_and_test_for_zero(struct lvmcache_vginfo *vginfo); + +struct lvmcache_vginfo *lvmcache_vginfo_from_vgname(const char *vgname, const char *vgid); -struct lvmcache_vginfo *vginfo_from_vgid(const char *vgid); -struct lvmcache_info *info_from_pvid(const char *pvid, int valid_only); -const char *vgname_from_vgid(struct dm_pool *mem, const char *vgid); -struct device *device_from_pvid(struct cmd_context *cmd, const struct id *pvid, - unsigned *scan_done_once); -const char *pvid_from_devname(struct cmd_context *cmd, +struct lvmcache_vginfo *lvmcache_vginfo_from_vgid(const char *vgid); +struct lvmcache_info *lvmcache_info_from_pvid(const char *pvid, int valid_only); +const char *lvmcache_vgname_from_vgid(struct dm_pool *mem, const char *vgid); +struct device *lvmcache_device_from_pvid(struct cmd_context *cmd, const struct id *pvid, + unsigned *scan_done_once, uint64_t *label_sector); +const char *lvmcache_pvid_from_devname(struct cmd_context *cmd, const char *dev_name); char *lvmcache_vgname_from_pvid(struct cmd_context *cmd, const char *pvid); -int vgs_locked(void); -int vgname_is_locked(const char *vgname); +const char *lvmcache_vgname_from_info(struct lvmcache_info *info); +int lvmcache_vgs_locked(void); +int lvmcache_vgname_is_locked(const char *vgname); + +void lvmcache_seed_infos_from_lvmetad(struct cmd_context *cmd); /* Returns list of struct str_lists containing pool-allocated copy of vgnames */ /* If include_internal is not set, return only proper vg names. */ @@ -117,8 +102,51 @@ struct dm_list *lvmcache_get_pvids(struct cmd_context *cmd, const char *vgname, const char *vgid); /* Returns cached volume group metadata. */ -struct volume_group *lvmcache_get_vg(const char *vgid, unsigned precommitted); +struct volume_group *lvmcache_get_vg(struct cmd_context *cmd, const char *vgname, + const char *vgid, unsigned precommitted); void lvmcache_drop_metadata(const char *vgname, int drop_precommitted); void lvmcache_commit_metadata(const char *vgname); +int lvmcache_pvid_is_locked(const char *pvid); +int lvmcache_fid_add_mdas(struct lvmcache_info *info, struct format_instance *fid, + const char *id, int id_len); +int lvmcache_fid_add_mdas_pv(struct lvmcache_info *info, struct format_instance *fid); +int lvmcache_fid_add_mdas_vg(struct lvmcache_vginfo *vginfo, struct format_instance *fid); +int lvmcache_populate_pv_fields(struct lvmcache_info *info, + struct physical_volume *pv, + int scan_label_only); +int lvmcache_check_format(struct lvmcache_info *info, const struct format_type *fmt); +void lvmcache_del_mdas(struct lvmcache_info *info); +void lvmcache_del_das(struct lvmcache_info *info); +int lvmcache_add_mda(struct lvmcache_info *info, struct device *dev, + uint64_t start, uint64_t size, unsigned ignored); +int lvmcache_add_da(struct lvmcache_info *info, uint64_t start, uint64_t size); + +const struct format_type *lvmcache_fmt(struct lvmcache_info *info); +struct label *lvmcache_get_label(struct lvmcache_info *info); + +void lvmcache_update_pv(struct lvmcache_info *info, struct physical_volume *pv, + const struct format_type *fmt); +int lvmcache_update_das(struct lvmcache_info *info, struct physical_volume *pv); +int lvmcache_foreach_mda(struct lvmcache_info *info, + int (*fun)(struct metadata_area *, void *), + void *baton); + +int lvmcache_foreach_da(struct lvmcache_info *info, + int (*fun)(struct disk_locn *, void *), + void *baton); + +int lvmcache_foreach_pv(struct lvmcache_vginfo *vg, + int (*fun)(struct lvmcache_info *, void *), void * baton); + +uint64_t lvmcache_device_size(struct lvmcache_info *info); +void lvmcache_set_device_size(struct lvmcache_info *info, uint64_t size); +struct device *lvmcache_device(struct lvmcache_info *info); +void lvmcache_make_valid(struct lvmcache_info *info); +int lvmcache_is_orphan(struct lvmcache_info *info); +int lvmcache_uncertain_ownership(struct lvmcache_info *info); +int lvmcache_mda_count(struct lvmcache_info *info); +int lvmcache_vgid_is_cached(const char *vgid); +int lvmcache_smallest_mda_size(struct lvmcache_info *info); + #endif |