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92eba53a79
Add function to obtain percentage value for cache lv_seg_status. This API is rather evolving 'middle' step as the ultimate goal is segment API fuctionality. But first we need to be clear at reporting level which values are needed to be reported for which LVs and segments.
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 "vg.h"
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union lvid;
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struct lv_segment;
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struct replicator_device;
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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 replicator_device *rdevice;/* For replicator-devs, rimages, slogs - reference to rdevice */
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struct dm_list rsites; /* For replicators - all sites */
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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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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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};
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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_data(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, int needs_exlusive);
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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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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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