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b66fa91c46
lvm2/lib/metadata/segtype.h
Alasdair G Kergon b66fa91c46 segtypes: Further segtype macros.
2016-08-05 14:00:40 +01:00

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2015 Red Hat, Inc. All rights reserved.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _SEGTYPES_H
#define _SEGTYPES_H
#include "metadata-exported.h"
struct segtype_handler;
struct cmd_context;
struct dm_config_tree;
struct lv_segment;
struct lv_activate_opts;
struct formatter;
struct dm_config_node;
struct dev_manager;
/* Feature flags */
#define SEG_CAN_SPLIT 0x0000000000000001ULL
#define SEG_AREAS_STRIPED 0x0000000000000002ULL
#define SEG_AREAS_MIRRORED 0x0000000000000004ULL
#define SEG_SNAPSHOT 0x0000000000000008ULL
#define SEG_FORMAT1_SUPPORT 0x0000000000000010ULL
#define SEG_VIRTUAL 0x0000000000000020ULL
#define SEG_CANNOT_BE_ZEROED 0x0000000000000040ULL
#define SEG_MONITORED 0x0000000000000080ULL
#define SEG_REPLICATOR 0x0000000000000100ULL
#define SEG_REPLICATOR_DEV 0x0000000000000200ULL
#define SEG_RAID 0x0000000000000400ULL
#define SEG_THIN_POOL 0x0000000000000800ULL
#define SEG_THIN_VOLUME 0x0000000000001000ULL
#define SEG_CACHE 0x0000000000002000ULL
#define SEG_CACHE_POOL 0x0000000000004000ULL
#define SEG_MIRROR 0x0000000000008000ULL
#define SEG_ONLY_EXCLUSIVE 0x0000000000010000ULL /* In cluster only exlusive activation */
#define SEG_CAN_ERROR_WHEN_FULL 0x0000000000020000ULL
#define SEG_RAID0 0x0000000000040000ULL
#define SEG_RAID0_META 0x0000000000080000ULL
#define SEG_RAID1 0x0000000000100000ULL
#define SEG_RAID10 0x0000000000200000ULL
#define SEG_RAID4 0x0000000000400000ULL
#define SEG_RAID5_N 0x0000000000800000ULL
#define SEG_RAID5_LA 0x0000000001000000ULL
#define SEG_RAID5_LS 0x0000000002000000ULL
#define SEG_RAID5_RA 0x0000000004000000ULL
#define SEG_RAID5_RS 0x0000000008000000ULL
#define SEG_RAID5 SEG_RAID5_LS
#define SEG_RAID6_NC 0x0000000010000000ULL
#define SEG_RAID6_NR 0x0000000020000000ULL
#define SEG_RAID6_ZR 0x0000000040000000ULL
#define SEG_RAID6_LA_6 0x0000000080000000ULL
#define SEG_RAID6_LS_6 0x0000000100000000ULL
#define SEG_RAID6_RA_6 0x0000000200000000ULL
#define SEG_RAID6_RS_6 0x0000000400000000ULL
#define SEG_RAID6_N_6 0x0000000800000000ULL
#define SEG_RAID6 SEG_RAID6_ZR
#define SEG_STRIPED_TARGET 0x0000008000000000ULL
#define SEG_UNKNOWN 0x8000000000000000ULL
#define SEG_TYPE_NAME_LINEAR "linear"
#define SEG_TYPE_NAME_STRIPED "striped"
#define SEG_TYPE_NAME_MIRROR "mirror"
#define SEG_TYPE_NAME_SNAPSHOT "snapshot"
#define SEG_TYPE_NAME_THIN "thin"
#define SEG_TYPE_NAME_THIN_POOL "thin-pool"
#define SEG_TYPE_NAME_CACHE "cache"
#define SEG_TYPE_NAME_CACHE_POOL "cache-pool"
#define SEG_TYPE_NAME_ERROR "error"
#define SEG_TYPE_NAME_FREE "free"
#define SEG_TYPE_NAME_ZERO "zero"
#define SEG_TYPE_NAME_RAID "raid"
#define SEG_TYPE_NAME_RAID0 "raid0"
#define SEG_TYPE_NAME_RAID0_META "raid0_meta"
#define SEG_TYPE_NAME_RAID1 "raid1"
#define SEG_TYPE_NAME_RAID10 "raid10"
#define SEG_TYPE_NAME_RAID4 "raid4"
#define SEG_TYPE_NAME_RAID5 "raid5"
#define SEG_TYPE_NAME_RAID5_N "raid5_n"
#define SEG_TYPE_NAME_RAID5_LA "raid5_la"
#define SEG_TYPE_NAME_RAID5_LS "raid5_ls"
#define SEG_TYPE_NAME_RAID5_RA "raid5_ra"
#define SEG_TYPE_NAME_RAID5_RS "raid5_rs"
#define SEG_TYPE_NAME_RAID6 "raid6"
#define SEG_TYPE_NAME_RAID6_NC "raid6_nc"
#define SEG_TYPE_NAME_RAID6_NR "raid6_nr"
#define SEG_TYPE_NAME_RAID6_ZR "raid6_zr"
#define SEG_TYPE_NAME_RAID6_LA_6 "raid6_la_6"
#define SEG_TYPE_NAME_RAID6_LS_6 "raid6_ls_6"
#define SEG_TYPE_NAME_RAID6_RA_6 "raid6_ra_6"
#define SEG_TYPE_NAME_RAID6_RS_6 "raid6_rs_6"
#define SEG_TYPE_NAME_RAID6_N_6 "raid6_n_6"
#define segtype_is_linear(segtype) (!strcmp(segtype->name, SEG_TYPE_NAME_LINEAR))
#define segtype_is_striped_target(segtype) ((segtype)->flags & SEG_STRIPED_TARGET ? 1 : 0)
#define segtype_is_cache(segtype) ((segtype)->flags & SEG_CACHE ? 1 : 0)
#define segtype_is_cache_pool(segtype) ((segtype)->flags & SEG_CACHE_POOL ? 1 : 0)
#define segtype_is_mirrored(segtype) ((segtype)->flags & SEG_AREAS_MIRRORED ? 1 : 0)
#define segtype_is_mirror(segtype) ((segtype)->flags & SEG_MIRROR ? 1 : 0)
#define segtype_is_pool(segtype) ((segtype)->flags & (SEG_CACHE_POOL | SEG_THIN_POOL) ? 1 : 0)
#define segtype_is_raid0(segtype) ((segtype)->flags & SEG_RAID0 ? 1 : 0)
#define segtype_is_raid0_meta(segtype) ((segtype)->flags & SEG_RAID0_META ? 1 : 0)
#define segtype_is_any_raid0(segtype) ((segtype)->flags & (SEG_RAID0 | SEG_RAID0_META) ? 1 : 0)
#define segtype_is_raid(segtype) ((segtype)->flags & SEG_RAID ? 1 : 0)
#define segtype_is_raid1(segtype) ((segtype)->flags & SEG_RAID1 ? 1 : 0)
#define segtype_is_raid4(segtype) ((segtype)->flags & SEG_RAID4 ? 1 : 0)
#define segtype_is_any_raid5(segtype) ((segtype)->flags & \
(SEG_RAID5_LS|SEG_RAID5_LA|SEG_RAID5_RS|SEG_RAID5_RA|SEG_RAID5_N) ? 1 : 0)
#define segtype_is_raid5_n(segtype) ((segtype)->flags & SEG_RAID5_N ? 1 : 0)
#define segtype_is_raid5_la(segtype) ((segtype)->flags & SEG_RAID5_LA ? 1 : 0)
#define segtype_is_raid5_ra(segtype) ((segtype)->flags & SEG_RAID5_RA ? 1 : 0)
#define segtype_is_raid5_ls(segtype) ((segtype)->flags & SEG_RAID5_LS ? 1 : 0)
#define segtype_is_raid5_rs(segtype) ((segtype)->flags & SEG_RAID5_RS ? 1 : 0)
#define segtype_is_any_raid6(segtype) ((segtype)->flags & \
(SEG_RAID6_ZR|SEG_RAID6_NC|SEG_RAID6_NR| \
SEG_RAID6_LA_6|SEG_RAID6_LS_6|SEG_RAID6_RA_6|SEG_RAID6_RS_6|SEG_RAID6_N_6) ? 1 : 0)
#define segtype_is_raid6_nc(segtype) ((segtype)->flags & SEG_RAID6_NC ? 1 : 0)
#define segtype_is_raid6_nr(segtype) ((segtype)->flags & SEG_RAID6_NR ? 1 : 0)
#define segtype_is_raid6_n_6(segtype) ((segtype)->flags & SEG_RAID6_N_6 ? 1 : 0)
#define segtype_is_raid6_zr(segtype) ((segtype)->flags & SEG_RAID6_ZR ? 1 : 0)
#define segtype_is_any_raid10(segtype) ((segtype)->flags & SEG_RAID10 ? 1 : 0)
#define segtype_is_raid10(segtype) ((segtype)->flags & SEG_RAID10 ? 1 : 0)
#define segtype_is_raid10_near(segtype) segtype_is_raid10(segtype)
#define segtype_is_raid_with_meta(segtype) (segtype_is_raid(segtype) && !segtype_is_raid0(segtype))
#define segtype_is_snapshot(segtype) ((segtype)->flags & SEG_SNAPSHOT ? 1 : 0)
#define segtype_is_striped(segtype) ((segtype)->flags & SEG_AREAS_STRIPED ? 1 : 0)
#define segtype_is_thin(segtype) ((segtype)->flags & (SEG_THIN_POOL|SEG_THIN_VOLUME) ? 1 : 0)
#define segtype_is_thin_pool(segtype) ((segtype)->flags & SEG_THIN_POOL ? 1 : 0)
#define segtype_is_thin_volume(segtype) ((segtype)->flags & SEG_THIN_VOLUME ? 1 : 0)
#define segtype_is_virtual(segtype) ((segtype)->flags & SEG_VIRTUAL ? 1 : 0)
#define segtype_is_unknown(segtype) ((segtype)->flags & SEG_UNKNOWN ? 1 : 0)
#define segtype_supports_stripe_size(segtype) \
((segtype_is_striped(segtype) || segtype_is_mirror(segtype) || \
segtype_is_cache(segtype) || segtype_is_cache_pool(segtype) || \
segtype_is_thin(segtype) || segtype_is_snapshot(segtype) || \
(segtype_is_raid(segtype) && !segtype_is_raid1(segtype))) ? 1 : 0)
#define seg_is_striped_target(seg) segtype_is_striped_target((seg)->segtype)
#define seg_is_cache(seg) segtype_is_cache((seg)->segtype)
#define seg_is_cache_pool(seg) segtype_is_cache_pool((seg)->segtype)
#define seg_is_linear(seg) (seg_is_striped(seg) && ((seg)->area_count == 1))
#define seg_is_mirror(seg) segtype_is_mirror((seg)->segtype)
#define seg_is_mirrored(seg) segtype_is_mirrored((seg)->segtype)
#define seg_is_pool(seg) segtype_is_pool((seg)->segtype)
#define seg_is_raid0(seg) segtype_is_raid0((seg)->segtype)
#define seg_is_raid0_meta(seg) segtype_is_raid0_meta((seg)->segtype)
#define seg_is_any_raid0(seg) segtype_is_any_raid0((seg)->segtype)
#define seg_is_raid(seg) segtype_is_raid((seg)->segtype)
#define seg_is_raid1(seg) segtype_is_raid1((seg)->segtype)
#define seg_is_raid4(seg) segtype_is_raid4((seg)->segtype)
#define seg_is_any_raid5(seg) segtype_is_any_raid5((seg)->segtype)
#define seg_is_raid5_n(seg) segtype_is_raid5_n((seg)->segtype)
#define seg_is_raid5_la(seg) segtype_is_raid5_la((seg)->segtype)
#define seg_is_raid5_ra(seg) segtype_is_raid5_ra((seg)->segtype)
#define seg_is_raid5_ls(seg) segtype_is_raid5_ls((seg)->segtype)
#define seg_is_raid5_rs(seg) segtype_is_raid5_rs((seg)->segtype)
#define seg_is_any_raid6(seg) segtype_is_any_raid6((seg)->segtype)
#define seg_is_raid6_zr(seg) segtype_is_raid6_zr((seg)->segtype)
#define seg_is_raid6_nr(seg) segtype_is_raid6_nr((seg)->segtype)
#define seg_is_raid6_nc(seg) segtype_is_raid6_nc((seg)->segtype)
#define seg_is_raid6_n_6(seg) segtype_is_raid6_n_6((seg)->segtype)
#define seg_is_any_raid10(seg) segtype_is_any_raid10((seg)->segtype)
#define seg_is_raid10(seg) segtype_is_raid10((seg)->segtype)
#define seg_is_raid10_near(seg) segtype_is_raid10_near((seg)->segtype)
#define seg_is_raid_with_meta(seg) segtype_is_raid_with_meta((seg)->segtype)
#define seg_is_replicator(seg) ((seg)->segtype->flags & SEG_REPLICATOR ? 1 : 0)
#define seg_is_replicator_dev(seg) ((seg)->segtype->flags & SEG_REPLICATOR_DEV ? 1 : 0)
#define seg_is_snapshot(seg) segtype_is_snapshot((seg)->segtype)
#define seg_is_striped(seg) segtype_is_striped((seg)->segtype)
#define seg_is_thin(seg) segtype_is_thin((seg)->segtype)
#define seg_is_thin_pool(seg) segtype_is_thin_pool((seg)->segtype)
#define seg_is_thin_volume(seg) segtype_is_thin_volume((seg)->segtype)
#define seg_is_virtual(seg) segtype_is_virtual((seg)->segtype)
#define seg_unknown(seg) segtype_is_unknown((seg)->segtype)
#define seg_can_split(seg) ((seg)->segtype->flags & SEG_CAN_SPLIT ? 1 : 0)
#define seg_cannot_be_zeroed(seg) ((seg)->segtype->flags & SEG_CANNOT_BE_ZEROED ? 1 : 0)
#define seg_monitored(seg) ((seg)->segtype->flags & SEG_MONITORED ? 1 : 0)
#define seg_only_exclusive(seg) ((seg)->segtype->flags & SEG_ONLY_EXCLUSIVE ? 1 : 0)
#define seg_can_error_when_full(seg) ((seg)->segtype->flags & SEG_CAN_ERROR_WHEN_FULL ? 1 : 0)
struct segment_type {
struct dm_list list; /* Internal */
uint64_t flags;
uint32_t parity_devs; /* Parity drives required by segtype */
struct segtype_handler *ops;
const char *name;
void *library; /* lvm_register_segtype() sets this. */
void *private; /* For the segtype handler to use. */
};
struct segtype_handler {
const char *(*name) (const struct lv_segment * seg);
const char *(*target_name) (const struct lv_segment *seg,
const struct lv_activate_opts *laopts);
void (*display) (const struct lv_segment * seg);
int (*text_export) (const struct lv_segment * seg,
struct formatter * f);
int (*text_import_area_count) (const struct dm_config_node * sn,
uint32_t *area_count);
int (*text_import) (struct lv_segment * seg,
const struct dm_config_node * sn,
struct dm_hash_table * pv_hash);
int (*merge_segments) (struct lv_segment * seg1,
struct lv_segment * seg2);
int (*add_target_line) (struct dev_manager *dm, struct dm_pool *mem,
struct cmd_context *cmd, void **target_state,
struct lv_segment *seg,
const struct lv_activate_opts *laopts,
struct dm_tree_node *node, uint64_t len,
uint32_t *pvmove_mirror_count);
int (*target_status_compatible) (const char *type);
int (*check_transient_status) (struct dm_pool *mem,
struct lv_segment *seg, char *params);
int (*target_percent) (void **target_state,
dm_percent_t *percent,
struct dm_pool * mem,
struct cmd_context *cmd,
struct lv_segment *seg, char *params,
uint64_t *total_numerator,
uint64_t *total_denominator);
int (*target_present) (struct cmd_context *cmd,
const struct lv_segment *seg,
unsigned *attributes);
int (*modules_needed) (struct dm_pool *mem,
const struct lv_segment *seg,
struct dm_list *modules);
void (*destroy) (struct segment_type * segtype);
int (*target_monitored) (struct lv_segment *seg, int *pending);
int (*target_monitor_events) (struct lv_segment *seg, int events);
int (*target_unmonitor_events) (struct lv_segment *seg, int events);
};
struct segment_type *get_segtype_from_string(struct cmd_context *cmd,
const char *str);
struct segment_type *get_segtype_from_flag(struct cmd_context *cmd,
uint64_t flag);
struct segtype_library;
int lvm_register_segtype(struct segtype_library *seglib,
struct segment_type *segtype);
struct segment_type *init_striped_segtype(struct cmd_context *cmd);
struct segment_type *init_zero_segtype(struct cmd_context *cmd);
struct segment_type *init_error_segtype(struct cmd_context *cmd);
struct segment_type *init_free_segtype(struct cmd_context *cmd);
struct segment_type *init_unknown_segtype(struct cmd_context *cmd,
const char *name);
#define RAID_FEATURE_RAID10 (1U << 0) /* version 1.3 */
#define RAID_FEATURE_RAID0 (1U << 1) /* version 1.7 */
#define RAID_FEATURE_RESHAPING (1U << 2) /* version 1.8 */
#ifdef RAID_INTERNAL
int init_raid_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
#endif
#ifdef REPLICATOR_INTERNAL
int init_replicator_segtype(struct cmd_context *cmd, struct segtype_library *seglib);
#endif
#define THIN_FEATURE_DISCARDS (1U << 0)
#define THIN_FEATURE_EXTERNAL_ORIGIN (1U << 1)
#define THIN_FEATURE_HELD_ROOT (1U << 2)
#define THIN_FEATURE_BLOCK_SIZE (1U << 3)
#define THIN_FEATURE_DISCARDS_NON_POWER_2 (1U << 4)
#define THIN_FEATURE_METADATA_RESIZE (1U << 5)
#define THIN_FEATURE_EXTERNAL_ORIGIN_EXTEND (1U << 6)
#define THIN_FEATURE_ERROR_IF_NO_SPACE (1U << 7)
#ifdef THIN_INTERNAL
int init_thin_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
#endif
#ifdef CACHE_INTERNAL
int init_cache_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
#endif
#define CACHE_FEATURE_POLICY_MQ (1U << 0)
#define CACHE_FEATURE_POLICY_SMQ (1U << 1)
#define SNAPSHOT_FEATURE_FIXED_LEAK (1U << 0) /* version 1.12 */
#ifdef SNAPSHOT_INTERNAL
struct segment_type *init_snapshot_segtype(struct cmd_context *cmd);
#endif
#define MIRROR_LOG_CLUSTERED (1U << 0)
#ifdef MIRRORED_INTERNAL
struct segment_type *init_mirrored_segtype(struct cmd_context *cmd);
#endif
#ifdef CRYPT_INTERNAL
struct segment_type *init_crypt_segtype(struct cmd_context *cmd);
#endif
#endif
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