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8a74d1ec79
Add code to detect available cache features. Support policy_mq & policy_smq features which might be disabled. Introduce global_cache_disabled_features_CFG.
214 lines
8.4 KiB
C
214 lines
8.4 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2010 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _SEGTYPES_H
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#define _SEGTYPES_H
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#include "metadata-exported.h"
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struct segtype_handler;
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struct cmd_context;
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struct dm_config_tree;
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struct lv_segment;
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struct lv_activate_opts;
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struct formatter;
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struct dm_config_node;
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struct dev_manager;
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/* Feature flags */
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#define SEG_CAN_SPLIT 0x00000001U
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#define SEG_AREAS_STRIPED 0x00000002U
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#define SEG_AREAS_MIRRORED 0x00000004U
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#define SEG_SNAPSHOT 0x00000008U
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#define SEG_FORMAT1_SUPPORT 0x00000010U
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#define SEG_VIRTUAL 0x00000020U
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#define SEG_CANNOT_BE_ZEROED 0x00000040U
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#define SEG_MONITORED 0x00000080U
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#define SEG_REPLICATOR 0x00000100U
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#define SEG_REPLICATOR_DEV 0x00000200U
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#define SEG_RAID 0x00000400U
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#define SEG_THIN_POOL 0x00000800U
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#define SEG_THIN_VOLUME 0x00001000U
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#define SEG_CACHE 0x00002000U
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#define SEG_CACHE_POOL 0x00004000U
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#define SEG_MIRROR 0x00008000U
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#define SEG_ONLY_EXCLUSIVE 0x00010000U /* In cluster only exlusive activation */
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#define SEG_CAN_ERROR_WHEN_FULL 0x00020000U
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#define SEG_UNKNOWN 0x80000000U
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#define segtype_is_cache(segtype) ((segtype)->flags & SEG_CACHE ? 1 : 0)
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#define segtype_is_cache_pool(segtype) ((segtype)->flags & SEG_CACHE_POOL ? 1 : 0)
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#define segtype_is_mirrored(segtype) ((segtype)->flags & SEG_AREAS_MIRRORED ? 1 : 0)
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#define segtype_is_mirror(segtype) ((segtype)->flags & SEG_MIRROR ? 1 : 0)
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#define segtype_is_pool(segtype) ((segtype)->flags & (SEG_CACHE_POOL | SEG_THIN_POOL) ? 1 : 0)
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#define segtype_is_raid(segtype) ((segtype)->flags & SEG_RAID ? 1 : 0)
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#define segtype_is_striped(segtype) ((segtype)->flags & SEG_AREAS_STRIPED ? 1 : 0)
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#define segtype_is_thin(segtype) ((segtype)->flags & (SEG_THIN_POOL|SEG_THIN_VOLUME) ? 1 : 0)
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#define segtype_is_thin_pool(segtype) ((segtype)->flags & SEG_THIN_POOL ? 1 : 0)
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#define segtype_is_thin_volume(segtype) ((segtype)->flags & SEG_THIN_VOLUME ? 1 : 0)
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#define segtype_is_virtual(segtype) ((segtype)->flags & SEG_VIRTUAL ? 1 : 0)
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#define segtype_is_unknown(segtype) ((segtype)->flags & SEG_UNKNOWN ? 1 : 0)
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#define seg_is_cache(seg) segtype_is_cache((seg)->segtype)
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#define seg_is_cache_pool(seg) segtype_is_cache_pool((seg)->segtype)
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#define seg_is_linear(seg) (seg_is_striped(seg) && ((seg)->area_count == 1))
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#define seg_is_mirror(seg) segtype_is_mirror((seg)->segtype)
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#define seg_is_mirrored(seg) segtype_is_mirrored((seg)->segtype)
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#define seg_is_pool(seg) segtype_is_pool((seg)->segtype)
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#define seg_is_raid(seg) segtype_is_raid((seg)->segtype)
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#define seg_is_replicator(seg) ((seg)->segtype->flags & SEG_REPLICATOR ? 1 : 0)
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#define seg_is_replicator_dev(seg) ((seg)->segtype->flags & SEG_REPLICATOR_DEV ? 1 : 0)
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#define seg_is_snapshot(seg) ((seg)->segtype->flags & SEG_SNAPSHOT ? 1 : 0)
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#define seg_is_striped(seg) segtype_is_striped((seg)->segtype)
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#define seg_is_thin(seg) segtype_is_thin((seg)->segtype)
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#define seg_is_thin_pool(seg) segtype_is_thin_pool((seg)->segtype)
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#define seg_is_thin_volume(seg) segtype_is_thin_volume((seg)->segtype)
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#define seg_is_virtual(seg) segtype_is_virtual((seg)->segtype)
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#define seg_unknown(seg) segtype_is_unknown((seg)->segtype)
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#define seg_can_split(seg) ((seg)->segtype->flags & SEG_CAN_SPLIT ? 1 : 0)
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#define seg_cannot_be_zeroed(seg) ((seg)->segtype->flags & SEG_CANNOT_BE_ZEROED ? 1 : 0)
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#define seg_monitored(seg) ((seg)->segtype->flags & SEG_MONITORED ? 1 : 0)
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#define seg_only_exclusive(seg) ((seg)->segtype->flags & SEG_ONLY_EXCLUSIVE ? 1 : 0)
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#define seg_can_error_when_full(seg) ((seg)->segtype->flags & SEG_CAN_ERROR_WHEN_FULL ? 1 : 0)
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struct segment_type {
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struct dm_list list; /* Internal */
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uint32_t flags;
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uint32_t parity_devs; /* Parity drives required by segtype */
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struct segtype_handler *ops;
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const char *name;
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void *library; /* lvm_register_segtype() sets this. */
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void *private; /* For the segtype handler to use. */
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};
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struct segtype_handler {
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const char *(*name) (const struct lv_segment * seg);
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const char *(*target_name) (const struct lv_segment *seg,
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const struct lv_activate_opts *laopts);
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void (*display) (const struct lv_segment * seg);
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int (*text_export) (const struct lv_segment * seg,
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struct formatter * f);
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int (*text_import_area_count) (const struct dm_config_node * sn,
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uint32_t *area_count);
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int (*text_import) (struct lv_segment * seg,
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const struct dm_config_node * sn,
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struct dm_hash_table * pv_hash);
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int (*merge_segments) (struct lv_segment * seg1,
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struct lv_segment * seg2);
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int (*add_target_line) (struct dev_manager *dm, struct dm_pool *mem,
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struct cmd_context *cmd, void **target_state,
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struct lv_segment *seg,
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const struct lv_activate_opts *laopts,
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struct dm_tree_node *node, uint64_t len,
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uint32_t *pvmove_mirror_count);
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int (*target_status_compatible) (const char *type);
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int (*check_transient_status) (struct lv_segment *seg, char *params);
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int (*target_percent) (void **target_state,
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dm_percent_t *percent,
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struct dm_pool * mem,
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struct cmd_context *cmd,
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struct lv_segment *seg, char *params,
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uint64_t *total_numerator,
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uint64_t *total_denominator);
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int (*target_present) (struct cmd_context *cmd,
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const struct lv_segment *seg,
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unsigned *attributes);
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int (*modules_needed) (struct dm_pool *mem,
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const struct lv_segment *seg,
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struct dm_list *modules);
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void (*destroy) (struct segment_type * segtype);
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int (*target_monitored) (struct lv_segment *seg, int *pending);
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int (*target_monitor_events) (struct lv_segment *seg, int events);
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int (*target_unmonitor_events) (struct lv_segment *seg, int events);
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};
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struct segment_type *get_segtype_from_string(struct cmd_context *cmd,
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const char *str);
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struct segtype_library;
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int lvm_register_segtype(struct segtype_library *seglib,
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struct segment_type *segtype);
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struct segment_type *init_striped_segtype(struct cmd_context *cmd);
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struct segment_type *init_zero_segtype(struct cmd_context *cmd);
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struct segment_type *init_error_segtype(struct cmd_context *cmd);
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struct segment_type *init_free_segtype(struct cmd_context *cmd);
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struct segment_type *init_unknown_segtype(struct cmd_context *cmd,
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const char *name);
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#define RAID_FEATURE_RAID10 (1U << 0) /* version 1.3 */
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#ifdef RAID_INTERNAL
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int init_raid_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
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#endif
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#define SEG_TYPE_NAME_RAID1 "raid1"
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#define SEG_TYPE_NAME_RAID10 "raid10"
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#define SEG_TYPE_NAME_RAID4 "raid4"
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#define SEG_TYPE_NAME_RAID5 "raid5"
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#define SEG_TYPE_NAME_RAID5_LA "raid5_la"
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#define SEG_TYPE_NAME_RAID5_LS "raid5_ls"
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#define SEG_TYPE_NAME_RAID5_RA "raid5_ra"
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#define SEG_TYPE_NAME_RAID5_RS "raid5_rs"
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#define SEG_TYPE_NAME_RAID6 "raid6"
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#define SEG_TYPE_NAME_RAID6_NC "raid6_nc"
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#define SEG_TYPE_NAME_RAID6_NR "raid6_nr"
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#define SEG_TYPE_NAME_RAID6_ZR "raid6_zr"
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#ifdef REPLICATOR_INTERNAL
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int init_replicator_segtype(struct cmd_context *cmd, struct segtype_library *seglib);
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#endif
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#define THIN_FEATURE_DISCARDS (1U << 0)
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#define THIN_FEATURE_EXTERNAL_ORIGIN (1U << 1)
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#define THIN_FEATURE_HELD_ROOT (1U << 2)
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#define THIN_FEATURE_BLOCK_SIZE (1U << 3)
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#define THIN_FEATURE_DISCARDS_NON_POWER_2 (1U << 4)
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#define THIN_FEATURE_METADATA_RESIZE (1U << 5)
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#define THIN_FEATURE_EXTERNAL_ORIGIN_EXTEND (1U << 6)
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#define THIN_FEATURE_ERROR_IF_NO_SPACE (1U << 7)
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#ifdef THIN_INTERNAL
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int init_thin_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
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#endif
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#ifdef CACHE_INTERNAL
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int init_cache_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
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#endif
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#define CACHE_FEATURE_POLICY_MQ (1U << 0)
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#define CACHE_FEATURE_POLICY_SMQ (1U << 1)
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#define SNAPSHOT_FEATURE_FIXED_LEAK (1U << 0) /* version 1.12 */
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#ifdef SNAPSHOT_INTERNAL
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struct segment_type *init_snapshot_segtype(struct cmd_context *cmd);
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#endif
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#define MIRROR_LOG_CLUSTERED (1U << 0)
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#ifdef MIRRORED_INTERNAL
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struct segment_type *init_mirrored_segtype(struct cmd_context *cmd);
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#endif
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#ifdef CRYPT_INTERNAL
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struct segment_type *init_crypt_segtype(struct cmd_context *cmd);
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#endif
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#endif
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