mirror of
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210 lines
9.7 KiB
C
210 lines
9.7 KiB
C
/*
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* Copyright (C) 2001-2004 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_LV_H
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#define _LVM_LV_H
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#include "lib/metadata/vg.h"
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union lvid;
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struct lv_segment;
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enum activation_change;
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struct logical_volume {
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union lvid lvid;
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const char *name;
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struct volume_group *vg;
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uint64_t status;
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alloc_policy_t alloc;
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struct profile *profile;
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uint32_t read_ahead;
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int32_t major;
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int32_t minor;
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uint64_t size; /* Sectors visible */
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uint32_t le_count; /* Logical extents visible */
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uint32_t origin_count;
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uint32_t external_count;
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struct dm_list snapshot_segs;
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struct lv_segment *snapshot;
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struct dm_list segments;
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struct dm_list tags;
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struct dm_list segs_using_this_lv;
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struct dm_list indirect_glvs; /* For keeping track of historical LVs in ancestry chain */
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/*
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* this_glv variable is used as a helper for handling historical LVs.
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* If this LVs has no role at all in keeping track of historical LVs,
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* the this_glv variable is NULL. See also comments for struct
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* generic_logical_volume and struct historical_logical_volume below.
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*/
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struct generic_logical_volume *this_glv;
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uint64_t timestamp;
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unsigned new_lock_args:1;
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unsigned to_remove:1; /* set when LV is known to be removed */
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const char *hostname;
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const char *lock_args;
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};
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/*
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* With the introduction of tracking historical LVs, we need to make
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* a difference between live LV (struct logical_volume) and historical LV
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* (struct historical_logical_volume). To minimize the impact of this change
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* and to minimize the changes needed in the existing code, we use a
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* little trick here - when processing LVs (e.g. while reporting LV
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* properties), each historical LV is represented as dummy LV which is
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* an instance of struct logical_volume with all its properties set to
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* blank (hence "dummy LV") and with this_glv pointing to the struct
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* historical_logical_volume. This way all the existing code working with
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* struct logical_volume will see this historical LV as dummy live LV while
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* the code that needs to recognize between live and historical LV will
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* check this_glv first and then it will work either with the live
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* or historical LV properties appropriately.
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*/
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struct generic_logical_volume;
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/*
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* historical logical volume is an LV that has been removed already.
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* This is used to keep track of LV history.
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*/
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struct historical_logical_volume {
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union lvid lvid;
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const char *name;
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struct volume_group *vg;
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uint64_t timestamp;
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uint64_t timestamp_removed;
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struct generic_logical_volume *indirect_origin;
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struct dm_list indirect_glvs; /* list of struct generic_logical_volume */
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unsigned checked:1; /* set if this historical LV has been checked for validity */
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unsigned valid:1; /* historical LV is valid if there's at least one live LV among ancestors */
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unsigned fresh:1; /* historical LV has just been created (the original LV just removed) */
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};
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struct generic_logical_volume {
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int is_historical;
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union {
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struct logical_volume *live; /* is_historical=0 */
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struct historical_logical_volume *historical; /* is_historical=1 */
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};
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};
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struct lv_with_info_and_seg_status;
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/* LV dependencies */
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struct logical_volume *lv_parent(const struct logical_volume *lv);
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struct logical_volume *lv_convert_lv(const struct logical_volume *lv);
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struct logical_volume *lv_origin_lv(const struct logical_volume *lv);
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struct logical_volume *lv_mirror_log_lv(const struct logical_volume *lv);
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struct logical_volume *lv_data_lv(const struct logical_volume *lv);
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struct logical_volume *lv_convert(const struct logical_volume *lv);
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struct logical_volume *lv_origin(const struct logical_volume *lv);
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struct logical_volume *lv_mirror_log(const struct logical_volume *lv);
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struct logical_volume *lv_metadata_lv(const struct logical_volume *lv);
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struct logical_volume *lv_pool_lv(const struct logical_volume *lv);
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/* LV properties */
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uint64_t lv_size(const struct logical_volume *lv);
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uint64_t lvseg_size(const struct lv_segment *seg);
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uint64_t lvseg_chunksize(const struct lv_segment *seg);
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uint64_t lv_origin_size(const struct logical_volume *lv);
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uint64_t lv_metadata_size(const struct logical_volume *lv);
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struct profile *lv_config_profile(const struct logical_volume *lv);
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const char *lv_layer(const struct logical_volume *lv);
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const struct logical_volume *lv_lock_holder(const struct logical_volume *lv);
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const struct logical_volume *lv_committed(const struct logical_volume *lv);
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int lv_mirror_image_in_sync(const struct logical_volume *lv);
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int lv_raid_image_in_sync(const struct logical_volume *lv);
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int lv_raid_healthy(const struct logical_volume *lv);
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const char *lvseg_name(const struct lv_segment *seg);
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uint64_t lvseg_start(const struct lv_segment *seg);
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struct dm_list *lvseg_devices(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_devices_str(struct dm_pool *mem, const struct lv_segment *seg);
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struct dm_list *lvseg_metadata_devices(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_metadata_devices_str(struct dm_pool *mem, const struct lv_segment *seg);
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struct dm_list *lvseg_seg_pe_ranges(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_seg_pe_ranges_str(struct dm_pool *mem, const struct lv_segment *seg);
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struct dm_list *lvseg_seg_le_ranges(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_seg_le_ranges_str(struct dm_pool *mem, const struct lv_segment *seg);
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struct dm_list *lvseg_seg_metadata_le_ranges(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_seg_metadata_le_ranges_str(struct dm_pool *mem, const struct lv_segment *seg);
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/* LV kernel properties */
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int lv_kernel_major(const struct logical_volume *lv);
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int lv_kernel_minor(const struct logical_volume *lv);
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uint32_t lv_kernel_read_ahead(const struct logical_volume *lv);
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char *lvseg_kernel_discards_dup(struct dm_pool *mem, const struct lv_segment *seg);
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/* LV modification functions */
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int lv_set_creation(struct logical_volume *lv,
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const char *hostname, uint64_t timestamp);
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int lv_active_change(struct cmd_context *cmd, struct logical_volume *lv,
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enum activation_change activate);
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/* LV dup functions */
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char *lv_attr_dup_with_info_and_seg_status(struct dm_pool *mem, const struct lv_with_info_and_seg_status *lvdm);
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char *lv_attr_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_tags_dup(const struct logical_volume *lv);
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char *lv_path_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_dmpath_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_move_pv_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_move_pv_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_convert_lv_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_convert_lv_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_mirror_log_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_mirror_log_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_data_lv_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_data_lv_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_metadata_lv_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_metadata_lv_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_pool_lv_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_pool_lv_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_modules_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_name_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_fullname_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_parent_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_origin_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_origin_uuid_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lvseg_segtype_dup(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_discards_dup(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_cachemode_dup(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_monitor_dup(struct dm_pool *mem, const struct lv_segment *seg);
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char *lvseg_tags_dup(const struct lv_segment *seg);
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char *lv_creation_time_dup(struct dm_pool *mem, const struct logical_volume *lv, int iso_mode);
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char *lv_removal_time_dup(struct dm_pool *mem, const struct logical_volume *lv, int iso_mode);
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char *lv_host_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_active_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_profile_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lv_lock_args_dup(struct dm_pool *mem, const struct logical_volume *lv);
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char *lvseg_kernel_discards_dup_with_info_and_seg_status(struct dm_pool *mem, const struct lv_with_info_and_seg_status *lvdm);
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char *lv_time_dup(struct dm_pool *mem, const struct logical_volume *lv, int iso_mode);
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char *lv_dmpath_suffix_dup(struct dm_pool *mem, const struct logical_volume *lv,
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const char *suffix);
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typedef enum {
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PERCENT_GET_DATA = 0,
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PERCENT_GET_METADATA,
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PERCENT_GET_DIRTY
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} percent_get_t;
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dm_percent_t lvseg_percent_with_info_and_seg_status(const struct lv_with_info_and_seg_status *lvdm,
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percent_get_t type);
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#endif /* _LVM_LV_H */
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