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Diffstat (limited to 'lib/cache/lvmetad.h')
| -rw-r--r-- | lib/cache/lvmetad.h | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/lib/cache/lvmetad.h b/lib/cache/lvmetad.h deleted file mode 100644 index 5f0f552..0000000 --- a/lib/cache/lvmetad.h +++ /dev/null @@ -1,166 +0,0 @@ -/* - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#ifndef _LVM_METAD_H -#define _LVM_METAD_H - -#include "config-util.h" - -struct volume_group; -struct cmd_context; -struct dm_config_tree; -enum activation_change; - -typedef int (*activation_handler) (struct volume_group *vg, int partial, - enum activation_change activate); - -#ifdef LVMETAD_SUPPORT -/* - * Initialise the communication with lvmetad. Normally called by - * lvmcache_init. Sets up a global handle for our process. - */ -void lvmetad_init(struct cmd_context *); - -/* - * Override the use of lvmetad for retrieving scan results and metadata. - */ -void lvmetad_set_active(int); - -/* - * Configure the socket that lvmetad_init will use to connect to the daemon. - */ -void lvmetad_set_socket(const char *); - -/* - * Check whether lvmetad is active (where active means both that it is running - * and that we have a working connection with it). - */ -int lvmetad_active(void); - -/* Print a warning if lvmetad is enabled but we failed to connect. */ -void lvmetad_warning(void); - -/* - * Drop connection to lvmetad. A subsequent lvmetad_init() will re-establish - * the connection (possibly at a different socket path). - */ -void lvmetad_disconnect(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); - -/* - * 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(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(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(const struct id *pvid, struct device *device, - const struct format_type *fmt, uint64_t label_sector, - struct volume_group *vg, activation_handler handler); - -/* - * Inform the daemon that the device no longer exists. - */ -int lvmetad_pv_gone(dev_t devno, const char *pv_name, activation_handler handler); -int lvmetad_pv_gone_by_dev(struct device *dev, activation_handler handler); - -/* - * 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); - -/* - * 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, - activation_handler handler); - -int lvmetad_pvscan_all_devs(struct cmd_context *cmd, activation_handler handler); - -# else /* LVMETAD_SUPPORT */ - -# define lvmetad_init(cmd) do { } while (0) -# define lvmetad_disconnect() do { } while (0) -# define lvmetad_set_active(a) do { } while (0) -# define lvmetad_set_socket(a) do { } while (0) -# define lvmetad_active() (0) -# define lvmetad_warning() do { } while (0) -# define lvmetad_set_token(a) do { } while (0) -# define lvmetad_release_token() do { } while (0) -# define lvmetad_vg_update(vg) (1) -# define lvmetad_vg_remove(vg) (1) -# define lvmetad_pv_found(pvid, device, fmt, label_sector, vg, handler) (1) -# define lvmetad_pv_gone(devno, pv_name, handler) (1) -# define lvmetad_pv_gone_by_dev(dev, handler) (1) -# define lvmetad_pv_list_to_lvmcache(cmd) (1) -# define lvmetad_pv_lookup(cmd, pvid, found) (0) -# define lvmetad_pv_lookup_by_dev(cmd, dev, found) (0) -# define lvmetad_vg_list_to_lvmcache(cmd) (1) -# define lvmetad_vg_lookup(cmd, vgname, vgid) (NULL) -# define lvmetad_pvscan_single(cmd, dev, handler) (0) -# define lvmetad_pvscan_all_devs(cmd, handler) (0) - -# endif /* LVMETAD_SUPPORT */ - -#endif |