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lvm2/lib/metadata/segtype.h
Zdenek Kabelac e2c4a3ef67 segtype: add SEG_ONLY_EXCLUSIVE flag 
Mark segtypes which do require exclusive activation in cluster.r
2014-11-10 22:05:48 +01:00

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2010 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 0x00000001U
#define SEG_AREAS_STRIPED 0x00000002U
#define SEG_AREAS_MIRRORED 0x00000004U
#define SEG_SNAPSHOT 0x00000008U
#define SEG_FORMAT1_SUPPORT 0x00000010U
#define SEG_VIRTUAL 0x00000020U
#define SEG_CANNOT_BE_ZEROED 0x00000040U
#define SEG_MONITORED 0x00000080U
#define SEG_REPLICATOR 0x00000100U
#define SEG_REPLICATOR_DEV 0x00000200U
#define SEG_RAID 0x00000400U
#define SEG_THIN_POOL 0x00000800U
#define SEG_THIN_VOLUME 0x00001000U
#define SEG_CACHE 0x00002000U
#define SEG_CACHE_POOL 0x00004000U
#define SEG_MIRROR 0x00008000U
#define SEG_ONLY_EXCLUSIVE 0x00010000U /* In cluster only exlusive activation */
#define SEG_UNKNOWN 0x80000000U
#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_raid(segtype) ((segtype)->flags & SEG_RAID ? 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 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_raid(seg) segtype_is_raid((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) ((seg)->segtype->flags & SEG_SNAPSHOT ? 1 : 0)
#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)
struct segment_type {
struct dm_list list; /* Internal */
uint32_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 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 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 */
#ifdef RAID_INTERNAL
int init_raid_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
#endif
#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_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"
#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)
#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 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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