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80b2de9e6a
Enhance lv_info with lv_info_with_name_check. This 'variant' not only check existance if UUID in DM table but also compares its DM name whether it's matching expected LV name. Otherwise activation may 'skip' activation with rename in case the DM UUID already exists, just device is different name. This change make fairly easier manipulation with i.e. detached mirror leg which ATM is using same UUID - just the LV name have been changed. Used code was not able to run 'activation' (and do a rename) and just skipped the call. So the code used to do a workaround and 'tried' to deactivate such LV firts - this however work only in non-clvmd case, as cluster was not having the lock for deactivated LV. With this extended lv_info code will run 'activation' and will synchronize the name to match expected LV name. Patch extends _lv_info() with new paramter 'with_name_check', which is later translated into 'name_check' argument for _info_run() which in case of name mismatch evaluates the check as if device does not exists. Such call is only used in one place _lv_activate() which then let activation run. All other invocation of _info() calls are left intact. TODO: fix mirror table manipulation (and raid)....
113 lines
4.3 KiB
C
113 lines
4.3 KiB
C
/*
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* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2012 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _LVM_DEV_MANAGER_H
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#define _LVM_DEV_MANAGER_H
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#include "lib/metadata/metadata-exported.h"
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struct logical_volume;
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struct lv_activate_opts;
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struct volume_group;
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struct cmd_context;
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struct dev_manager;
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struct dm_info;
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struct device;
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struct lv_seg_status;
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int read_only_lv(const struct logical_volume *lv, const struct lv_activate_opts *laopts, const char *layer);
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/*
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* Constructor and destructor.
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*/
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struct dev_manager *dev_manager_create(struct cmd_context *cmd,
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const char *vg_name,
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unsigned track_pvmove_deps);
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void dev_manager_destroy(struct dev_manager *dm);
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void dev_manager_release(void);
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void dev_manager_exit(void);
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/*
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* The device handler is responsible for creating all the layered
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* dm devices, and ensuring that all constraints are maintained
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* (eg, an origin is created before its snapshot, but is not
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* unsuspended until the snapshot is also created.)
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*/
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int dev_manager_info(struct cmd_context *cmd, const struct logical_volume *lv,
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const char *layer,
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int with_open_count, int with_read_ahead, int with_name_check,
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struct dm_info *dminfo, uint32_t *read_ahead,
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struct lv_seg_status *seg_status);
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int dev_manager_snapshot_percent(struct dev_manager *dm,
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const struct logical_volume *lv,
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dm_percent_t *percent);
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int dev_manager_mirror_percent(struct dev_manager *dm,
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const struct logical_volume *lv, int wait,
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dm_percent_t *percent, uint32_t *event_nr);
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int dev_manager_raid_status(struct dev_manager *dm,
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const struct logical_volume *lv,
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struct dm_status_raid **status);
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int dev_manager_raid_message(struct dev_manager *dm,
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const struct logical_volume *lv,
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const char *msg);
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int dev_manager_writecache_message(struct dev_manager *dm,
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const struct logical_volume *lv,
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const char *msg);
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int dev_manager_cache_status(struct dev_manager *dm,
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const struct logical_volume *lv,
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struct lv_status_cache **status);
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int dev_manager_thin_pool_status(struct dev_manager *dm,
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const struct logical_volume *lv,
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struct dm_status_thin_pool **status,
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int flush);
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int dev_manager_thin_pool_percent(struct dev_manager *dm,
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const struct logical_volume *lv,
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int metadata, dm_percent_t *percent);
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int dev_manager_thin_percent(struct dev_manager *dm,
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const struct logical_volume *lv,
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int mapped, dm_percent_t *percent);
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int dev_manager_thin_device_id(struct dev_manager *dm,
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const struct logical_volume *lv,
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uint32_t *device_id);
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int dev_manager_vdo_pool_status(struct dev_manager *dm,
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const struct logical_volume *lv,
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struct lv_status_vdo **vdo_status,
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int flush);
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int dev_manager_suspend(struct dev_manager *dm, const struct logical_volume *lv,
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struct lv_activate_opts *laopts, int lockfs, int flush_required);
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int dev_manager_activate(struct dev_manager *dm, const struct logical_volume *lv,
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struct lv_activate_opts *laopts);
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int dev_manager_preload(struct dev_manager *dm, const struct logical_volume *lv,
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struct lv_activate_opts *laopts, int *flush_required);
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int dev_manager_deactivate(struct dev_manager *dm, const struct logical_volume *lv);
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int dev_manager_transient(struct dev_manager *dm, const struct logical_volume *lv) __attribute__((nonnull(1, 2)));
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int dev_manager_mknodes(const struct logical_volume *lv);
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/*
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* Put the desired changes into effect.
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*/
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int dev_manager_execute(struct dev_manager *dm);
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int dev_manager_device_uses_vg(struct device *dev,
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struct volume_group *vg);
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int dev_manager_remove_dm_major_minor(uint32_t major, uint32_t minor);
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int dev_manager_check_prefix_dm_major_minor(uint32_t major, uint32_t minor, const char *prefix);
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#endif
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