mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
7f97c7ea9a
As we start refactoring the code to break dependencies (see doc/refactoring.txt), I want us to use full paths in the includes (eg, #include "base/data-struct/list.h"). This makes it more obvious when we're breaking abstraction boundaries, eg, including a file in metadata/ from base/
214 lines
8.3 KiB
C
214 lines
8.3 KiB
C
/*
|
|
* Copyright (C) 2012 Red Hat, Inc.
|
|
*
|
|
* This file is part of LVM2.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU Lesser General Public License v.2.1.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef _LVM_METAD_H
|
|
#define _LVM_METAD_H
|
|
|
|
#include "libdaemon/client/config-util.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
struct volume_group;
|
|
struct cmd_context;
|
|
struct dm_config_tree;
|
|
enum activation_change;
|
|
|
|
typedef int (*activation_handler) (struct cmd_context *cmd,
|
|
const char *vgname, const char *vgid,
|
|
int partial, int changed,
|
|
enum activation_change activate);
|
|
|
|
#ifdef LVMETAD_SUPPORT
|
|
|
|
/*
|
|
* lvmetad_connect: connect to lvmetad
|
|
* lvmetad_disconnect: disconnect from lvmetad
|
|
* lvmetad_make_unused: disconnect from lvmetad and refresh cmd filter
|
|
* lvmetad_used: check if lvmetad is being used (i.e. is connected)
|
|
*/
|
|
int lvmetad_connect(struct cmd_context *cmd);
|
|
void lvmetad_disconnect(void);
|
|
void lvmetad_make_unused(struct cmd_context *cmd);
|
|
int lvmetad_used(void);
|
|
|
|
|
|
/*
|
|
* Configure the socket that lvmetad_init will use to connect to the daemon.
|
|
*/
|
|
void lvmetad_set_socket(const char *);
|
|
|
|
/*
|
|
* Check if lvmetad socket is present (either the one set by lvmetad_set_socket
|
|
* or the default one if not set).
|
|
*/
|
|
int lvmetad_socket_present(void);
|
|
|
|
/*
|
|
* Check if lvmetad pidfile is present, indicating that the lvmetad
|
|
* process is running or not.
|
|
*/
|
|
int lvmetad_pidfile_present(void);
|
|
|
|
/*
|
|
* Set the "lvmetad validity token" (currently only consists of the lvmetad
|
|
* filter. See lvm.conf.
|
|
*/
|
|
void lvmetad_set_token(const struct dm_config_value *filter);
|
|
|
|
/*
|
|
* Release allocated token.
|
|
*/
|
|
void lvmetad_release_token(void);
|
|
|
|
// FIXME What's described here doesn't appear to be implemented yet.
|
|
/*
|
|
* Send a new version of VG metadata to lvmetad. This is normally called after
|
|
* vg_write but before vg_commit. After vg_commit, lvmetad_vg_commit is called
|
|
* to seal the transaction. The result of lvmetad_vg_update is that the new
|
|
* metadata is stored tentatively in lvmetad, but it is not used until
|
|
* lvmetad_vg_commit. The request is validated immediately and lvmetad_vg_commit
|
|
* only constitutes a pointer update.
|
|
*/
|
|
int lvmetad_vg_update_pending(struct volume_group *vg);
|
|
int lvmetad_vg_update_finish(struct volume_group *vg);
|
|
|
|
/*
|
|
* Inform lvmetad that a VG has been removed. This is not entirely safe, but is
|
|
* only needed during vgremove, which does not wipe PV labels and therefore
|
|
* cannot mark the PVs as gone.
|
|
*/
|
|
int lvmetad_vg_remove_pending(struct volume_group *vg);
|
|
int lvmetad_vg_remove_finish(struct volume_group *vg);
|
|
|
|
/*
|
|
* Notify lvmetad that a PV has been found. It is not an error if the PV is
|
|
* already marked as present in lvmetad. If a non-NULL vg pointer is supplied,
|
|
* it is taken to represent the metadata read from the MDA(s) present on that
|
|
* PV. It *is* an error if: the VG is already known to lvmetad, the sequence
|
|
* number on the cached and on the discovered PV match but the metadata content
|
|
* does not.
|
|
*/
|
|
int lvmetad_pv_found(struct cmd_context *cmd, const struct id *pvid, struct device *dev,
|
|
const struct format_type *fmt, uint64_t label_sector,
|
|
struct volume_group *vg,
|
|
struct dm_list *found_vgnames,
|
|
struct dm_list *changed_vgnames);
|
|
|
|
/*
|
|
* Inform the daemon that the device no longer exists.
|
|
*/
|
|
int lvmetad_pv_gone(dev_t devno, const char *pv_name);
|
|
int lvmetad_pv_gone_by_dev(struct device *dev);
|
|
|
|
/*
|
|
* Request a list of all PVs available to lvmetad. If requested, this will also
|
|
* read labels off all the PVs to populate lvmcache.
|
|
*/
|
|
int lvmetad_pv_list_to_lvmcache(struct cmd_context *cmd);
|
|
|
|
/*
|
|
* Lookup an individual PV.
|
|
* If found is not NULL, it is set according to whether or not the PV is found,
|
|
* otherwise if the PV is not found an error is returned.
|
|
*/
|
|
int lvmetad_pv_lookup(struct cmd_context *cmd, struct id pvid, int *found);
|
|
int lvmetad_pv_lookup_by_dev(struct cmd_context *cmd, struct device *dev, int *found);
|
|
|
|
/*
|
|
* Request a list of all VGs available to lvmetad and use it to fill in
|
|
* lvmcache..
|
|
*/
|
|
int lvmetad_vg_list_to_lvmcache(struct cmd_context *cmd);
|
|
|
|
/*
|
|
* Request a list of vgid/vgname pairs for all VGs known to lvmetad.
|
|
* Does not do vg_lookup's on each VG, and does not populate lvmcache.
|
|
*/
|
|
int lvmetad_get_vgnameids(struct cmd_context *cmd, struct dm_list *vgnameids);
|
|
|
|
/*
|
|
* Find a VG by its ID or its name in the lvmetad cache. Gives NULL if the VG is
|
|
* not found.
|
|
*/
|
|
struct volume_group *lvmetad_vg_lookup(struct cmd_context *cmd,
|
|
const char *vgname, const char *vgid);
|
|
|
|
/*
|
|
* Scan a single device and update lvmetad with the result(s).
|
|
*/
|
|
int lvmetad_pvscan_single(struct cmd_context *cmd, struct device *dev,
|
|
struct dm_list *found_vgnames,
|
|
struct dm_list *changed_vgnames);
|
|
|
|
int lvmetad_pvscan_all_devs(struct cmd_context *cmd, int do_wait);
|
|
|
|
int lvmetad_vg_clear_outdated_pvs(struct volume_group *vg);
|
|
void lvmetad_validate_global_cache(struct cmd_context *cmd, int force);
|
|
int lvmetad_token_matches(struct cmd_context *cmd);
|
|
|
|
int lvmetad_vg_is_foreign(struct cmd_context *cmd, const char *vgname, const char *vgid);
|
|
|
|
int lvmetad_is_disabled(struct cmd_context *cmd, const char **reason);
|
|
void lvmetad_set_disabled(struct cmd_context *cmd, const char *reason);
|
|
void lvmetad_clear_disabled(struct cmd_context *cmd);
|
|
|
|
# else /* LVMETAD_SUPPORT */
|
|
|
|
static inline int lvmetad_connect(struct cmd_context *cmd) {return 0;}
|
|
static inline void lvmetad_disconnect(void) {}
|
|
static inline void lvmetad_make_unused(struct cmd_context *cmd) {}
|
|
static inline int lvmetad_used(void) {return 0;}
|
|
static inline void lvmetad_set_socket(const char *thing) {}
|
|
static inline int lvmetad_socket_present(void) {return 0;}
|
|
static inline int lvmetad_pidfile_present(void) {return 0;}
|
|
static inline void lvmetad_set_token(const struct dm_config_value *filter) {}
|
|
static inline void lvmetad_release_token(void) {}
|
|
static inline int lvmetad_vg_update_pending(struct volume_group *vg) {return 1;}
|
|
static inline int lvmetad_vg_update_finish(struct volume_group *vg) {return 1;}
|
|
static inline int lvmetad_vg_remove_pending(struct volume_group *vg) {return 1;}
|
|
static inline int lvmetad_vg_remove_finish(struct volume_group *vg) {return 1;}
|
|
static inline int lvmetad_pv_found(struct cmd_context *cmd, const struct id *pvid, struct device *dev,
|
|
const struct format_type *fmt, uint64_t label_sector,
|
|
struct volume_group *vg,
|
|
struct dm_list *found_vgnames,
|
|
struct dm_list *changed_vgnames) {return 1;}
|
|
static inline int lvmetad_pv_gone(dev_t devno, const char *pv_name) {return 1;}
|
|
static inline int lvmetad_pv_gone_by_dev(struct device *dev) {return 1;}
|
|
static inline int lvmetad_pv_list_to_lvmcache(struct cmd_context *cmd) {return 1;}
|
|
static inline int lvmetad_pv_lookup(struct cmd_context *cmd, struct id pvid, int *found) {return 0;}
|
|
static inline int lvmetad_pv_lookup_by_dev(struct cmd_context *cmd, struct device *dev, int *found) {return 0;}
|
|
static inline int lvmetad_vg_list_to_lvmcache(struct cmd_context *cmd) {return 1;}
|
|
static inline int lvmetad_get_vgnameids(struct cmd_context *cmd, struct dm_list *vgnameids) {return 0;}
|
|
static inline struct volume_group *lvmetad_vg_lookup(struct cmd_context *cmd,
|
|
const char *vgname, const char *vgid) {return NULL;}
|
|
static inline int lvmetad_pvscan_single(struct cmd_context *cmd, struct device *dev,
|
|
struct dm_list *found_vgnames,
|
|
struct dm_list *changed_vgnames) {return 0;}
|
|
|
|
static inline int lvmetad_pvscan_all_devs(struct cmd_context *cmd, int do_wait) {return 0;}
|
|
|
|
static inline int lvmetad_vg_clear_outdated_pvs(struct volume_group *vg) {return 0;}
|
|
static inline void lvmetad_validate_global_cache(struct cmd_context *cmd, int force) {}
|
|
static inline int lvmetad_token_matches(struct cmd_context *cmd) {return 1;}
|
|
|
|
static inline int lvmetad_vg_is_foreign(struct cmd_context *cmd, const char *vgname, const char *vgid) {return 0;}
|
|
|
|
static inline int lvmetad_is_disabled(struct cmd_context *cmd, const char **reason) {return 0;}
|
|
static inline void lvmetad_set_disabled(struct cmd_context *cmd, const char *reason) {}
|
|
static inline void lvmetad_clear_disabled(struct cmd_context *cmd) {}
|
|
|
|
# endif /* LVMETAD_SUPPORT */
|
|
|
|
#endif
|