mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
a5fb2bbff3
Pass metadataignore through PV creation / setup paths. As a result of this cleanup, we can remove the unnecessary setting of mda_ignore bits inside pvcreate_single(), after call to pv_create. For now, just set metadataignore to '0' in some places. This is equivalent to the prior functionality, although the 0 is given by the caller not hardcoded in _mda_setup() call. Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
420 lines
13 KiB
C
420 lines
13 KiB
C
/*
|
|
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
|
|
* Copyright (C) 2004-2007 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
|
|
*/
|
|
|
|
/*
|
|
* This is the in core representation of a volume group and its
|
|
* associated physical and logical volumes.
|
|
*/
|
|
|
|
#ifndef _LVM_METADATA_H
|
|
#define _LVM_METADATA_H
|
|
|
|
#include "ctype.h"
|
|
#include "dev-cache.h"
|
|
#include "lvm-string.h"
|
|
#include "metadata-exported.h"
|
|
|
|
//#define MAX_STRIPES 128U
|
|
//#define SECTOR_SHIFT 9L
|
|
//#define SECTOR_SIZE ( 1L << SECTOR_SHIFT )
|
|
//#define STRIPE_SIZE_MIN ( (unsigned) lvm_getpagesize() >> SECTOR_SHIFT) /* PAGESIZE in sectors */
|
|
//#define STRIPE_SIZE_MAX ( 512L * 1024L >> SECTOR_SHIFT) /* 512 KB in sectors */
|
|
//#define STRIPE_SIZE_LIMIT ((UINT_MAX >> 2) + 1)
|
|
//#define PV_MIN_SIZE ( 512L * 1024L >> SECTOR_SHIFT) /* 512 KB in sectors */
|
|
//#define MAX_RESTRICTED_LVS 255 /* Used by FMT_RESTRICTED_LVIDS */
|
|
#define MIRROR_LOG_OFFSET 2 /* sectors */
|
|
#define VG_MEMPOOL_CHUNK 10240 /* in bytes, hint only */
|
|
|
|
/*
|
|
* Ceiling(n / sz)
|
|
*/
|
|
#define dm_div_up(n, sz) (((n) + (sz) - 1) / (sz))
|
|
|
|
/*
|
|
* Ceiling(n / size) * size
|
|
*/
|
|
#define dm_round_up(n, sz) (dm_div_up((n), (sz)) * (sz))
|
|
|
|
|
|
/* Various flags */
|
|
/* Note that the bits no longer necessarily correspond to LVM1 disk format */
|
|
|
|
//#define PARTIAL_VG 0x00000001U /* VG */
|
|
//#define EXPORTED_VG 0x00000002U /* VG PV */
|
|
//#define RESIZEABLE_VG 0x00000004U /* VG */
|
|
|
|
/* May any free extents on this PV be used or must they be left free? */
|
|
//#define ALLOCATABLE_PV 0x00000008U /* PV */
|
|
|
|
#define SPINDOWN_LV 0x00000010U /* LV */
|
|
#define BADBLOCK_ON 0x00000020U /* LV */
|
|
//#define VISIBLE_LV 0x00000040U /* LV */
|
|
//#define FIXED_MINOR 0x00000080U /* LV */
|
|
/* FIXME Remove when metadata restructuring is completed */
|
|
//#define SNAPSHOT 0x00001000U /* LV - internal use only */
|
|
//#define PVMOVE 0x00002000U /* VG LV SEG */
|
|
//#define LOCKED 0x00004000U /* LV */
|
|
//#define MIRRORED 0x00008000U /* LV - internal use only */
|
|
#define VIRTUAL 0x00010000U /* LV - internal use only */
|
|
//#define MIRROR_LOG 0x00020000U /* LV */
|
|
//#define MIRROR_IMAGE 0x00040000U /* LV */
|
|
//#define MIRROR_NOTSYNCED 0x00080000U /* LV */
|
|
#define ACTIVATE_EXCL 0x00100000U /* LV - internal use only */
|
|
#define PRECOMMITTED 0x00200000U /* VG - internal use only */
|
|
//#define CONVERTING 0x00400000U /* LV */
|
|
|
|
//#define MISSING_PV 0x00800000U /* PV */
|
|
#define INCONSISTENT_VG 0x00800000U /* VG - internal use only */
|
|
//#define PARTIAL_LV 0x01000000U /* LV - derived flag, not
|
|
// written out in metadata*/
|
|
|
|
#define POSTORDER_FLAG 0x02000000U /* Not real flags, reserved for */
|
|
#define POSTORDER_OPEN_FLAG 0x04000000U /* temporary use inside vg_read_internal. */
|
|
#define VIRTUAL_ORIGIN 0x08000000U /* LV - internal use only */
|
|
|
|
//#define LVM_READ 0x00000100U /* LV VG */
|
|
//#define LVM_WRITE 0x00000200U /* LV VG */
|
|
//#define CLUSTERED 0x00000400U /* VG */
|
|
#define SHARED 0x00000800U /* VG */
|
|
|
|
/* Format features flags */
|
|
//#define FMT_SEGMENTS 0x00000001U /* Arbitrary segment params? */
|
|
//#define FMT_MDAS 0x00000002U /* Proper metadata areas? */
|
|
//#define FMT_TAGS 0x00000004U /* Tagging? */
|
|
//#define FMT_UNLIMITED_VOLS 0x00000008U /* Unlimited PVs/LVs? */
|
|
//#define FMT_RESTRICTED_LVIDS 0x00000010U /* LVID <= 255 */
|
|
//#define FMT_ORPHAN_ALLOCATABLE 0x00000020U /* Orphan PV allocatable? */
|
|
#define FMT_PRECOMMIT 0x00000040U /* Supports pre-commit? */
|
|
//#define FMT_RESIZE_PV 0x00000080U /* Supports pvresize? */
|
|
//#define FMT_UNLIMITED_STRIPESIZE 0x00000100U /* Unlimited stripe size? */
|
|
|
|
struct metadata_area;
|
|
|
|
/* Per-format per-metadata area operations */
|
|
struct metadata_area_ops {
|
|
struct volume_group *(*vg_read) (struct format_instance * fi,
|
|
const char *vg_name,
|
|
struct metadata_area * mda);
|
|
struct volume_group *(*vg_read_precommit) (struct format_instance * fi,
|
|
const char *vg_name,
|
|
struct metadata_area * mda);
|
|
/*
|
|
* Write out complete VG metadata. You must ensure internal
|
|
* consistency before calling. eg. PEs can't refer to PVs not
|
|
* part of the VG.
|
|
*
|
|
* It is also the responsibility of the caller to ensure external
|
|
* consistency, eg by calling pv_write() if removing PVs from
|
|
* a VG or calling vg_write() a second time if splitting a VG
|
|
* into two.
|
|
*
|
|
* vg_write() should not read or write from any PVs not included
|
|
* in the volume_group structure it is handed.
|
|
* (format1 currently breaks this rule.)
|
|
*/
|
|
int (*vg_write) (struct format_instance * fid, struct volume_group * vg,
|
|
struct metadata_area * mda);
|
|
int (*vg_precommit) (struct format_instance * fid,
|
|
struct volume_group * vg,
|
|
struct metadata_area * mda);
|
|
int (*vg_commit) (struct format_instance * fid,
|
|
struct volume_group * vg, struct metadata_area * mda);
|
|
int (*vg_revert) (struct format_instance * fid,
|
|
struct volume_group * vg, struct metadata_area * mda);
|
|
int (*vg_remove) (struct format_instance * fi, struct volume_group * vg,
|
|
struct metadata_area * mda);
|
|
|
|
/*
|
|
* Per location copy constructor.
|
|
*/
|
|
void *(*mda_metadata_locn_copy) (struct dm_pool *mem, void *metadata_locn);
|
|
|
|
/*
|
|
* Per location description for logging.
|
|
*/
|
|
const char *(*mda_metadata_locn_name) (void *metadata_locn);
|
|
uint64_t const (*mda_metadata_locn_offset) (void *metadata_locn);
|
|
|
|
/*
|
|
* Returns number of free sectors in given metadata area.
|
|
*/
|
|
uint64_t (*mda_free_sectors) (struct metadata_area *mda);
|
|
|
|
/*
|
|
* Returns number of total sectors in given metadata area.
|
|
*/
|
|
uint64_t (*mda_total_sectors) (struct metadata_area *mda);
|
|
|
|
/*
|
|
* Check if metadata area belongs to vg
|
|
*/
|
|
int (*mda_in_vg) (struct format_instance * fi,
|
|
struct volume_group * vg, struct metadata_area *mda);
|
|
/*
|
|
* Analyze a metadata area on a PV.
|
|
*/
|
|
int (*pv_analyze_mda) (const struct format_type * fmt,
|
|
struct metadata_area *mda);
|
|
|
|
/*
|
|
* Do these two metadata_area structures match with respect to
|
|
* their underlying location?
|
|
*/
|
|
unsigned (*mda_locns_match)(struct metadata_area *mda1,
|
|
struct metadata_area *mda2);
|
|
};
|
|
|
|
#define MDA_IGNORED 0x00000001
|
|
|
|
struct metadata_area {
|
|
struct dm_list list;
|
|
struct metadata_area_ops *ops;
|
|
void *metadata_locn;
|
|
uint32_t flags;
|
|
};
|
|
struct metadata_area *mda_copy(struct dm_pool *mem,
|
|
struct metadata_area *mda);
|
|
|
|
unsigned mda_is_ignored(struct metadata_area *mda);
|
|
void mda_set_ignored(struct metadata_area *mda, unsigned ignored);
|
|
unsigned mda_locns_match(struct metadata_area *mda1, struct metadata_area *mda2);
|
|
void fid_add_mda(struct format_instance *fid, struct metadata_area *mda);
|
|
int fid_add_mdas(struct format_instance *fid, struct dm_list *mdas);
|
|
int mdas_empty_or_ignored(struct dm_list *mdas);
|
|
|
|
#define seg_pvseg(seg, s) (seg)->areas[(s)].u.pv.pvseg
|
|
#define seg_dev(seg, s) (seg)->areas[(s)].u.pv.pvseg->pv->dev
|
|
#define seg_pe(seg, s) (seg)->areas[(s)].u.pv.pvseg->pe
|
|
#define seg_le(seg, s) (seg)->areas[(s)].u.lv.le
|
|
|
|
struct name_list {
|
|
struct dm_list list;
|
|
char *name;
|
|
};
|
|
|
|
struct mda_list {
|
|
struct dm_list list;
|
|
struct device_area mda;
|
|
};
|
|
|
|
struct peg_list {
|
|
struct dm_list list;
|
|
struct pv_segment *peg;
|
|
};
|
|
|
|
struct seg_list {
|
|
struct dm_list list;
|
|
unsigned count;
|
|
struct lv_segment *seg;
|
|
};
|
|
|
|
/*
|
|
* Ownership of objects passes to caller.
|
|
*/
|
|
struct format_handler {
|
|
/*
|
|
* Scan any metadata areas that aren't referenced in PV labels
|
|
*/
|
|
int (*scan) (const struct format_type * fmt);
|
|
|
|
/*
|
|
* Return PV with given path.
|
|
*/
|
|
int (*pv_read) (const struct format_type * fmt, const char *pv_name,
|
|
struct physical_volume * pv, struct dm_list *mdas,
|
|
int scan_label_only);
|
|
|
|
/*
|
|
* Tweak an already filled out a pv ready for importing into a
|
|
* vg. eg. pe_count is format specific.
|
|
*/
|
|
int (*pv_setup) (const struct format_type * fmt,
|
|
uint64_t pe_start, uint32_t extent_count,
|
|
uint32_t extent_size, unsigned long data_alignment,
|
|
unsigned long data_alignment_offset,
|
|
int pvmetadatacopies, uint64_t pvmetadatasize,
|
|
unsigned metadataignore, struct dm_list * mdas,
|
|
struct physical_volume * pv, struct volume_group * vg);
|
|
|
|
/*
|
|
* Write a PV structure to disk. Fails if the PV is in a VG ie
|
|
* pv->vg_name must be a valid orphan VG name
|
|
*/
|
|
int (*pv_write) (const struct format_type * fmt,
|
|
struct physical_volume * pv, struct dm_list * mdas,
|
|
int64_t label_sector);
|
|
|
|
/*
|
|
* Tweak an already filled out a lv eg, check there
|
|
* aren't too many extents.
|
|
*/
|
|
int (*lv_setup) (struct format_instance * fi,
|
|
struct logical_volume * lv);
|
|
|
|
/*
|
|
* Tweak an already filled out vg. eg, max_pv is format
|
|
* specific.
|
|
*/
|
|
int (*vg_setup) (struct format_instance * fi, struct volume_group * vg);
|
|
|
|
/*
|
|
* Check whether particular segment type is supported.
|
|
*/
|
|
int (*segtype_supported) (struct format_instance *fid,
|
|
const struct segment_type *segtype);
|
|
|
|
/*
|
|
* Create format instance with a particular metadata area
|
|
*/
|
|
struct format_instance *(*create_instance) (const struct format_type *
|
|
fmt, const char *vgname,
|
|
const char *vgid,
|
|
void *context);
|
|
|
|
/*
|
|
* Destructor for format instance
|
|
*/
|
|
void (*destroy_instance) (struct format_instance * fid);
|
|
|
|
/*
|
|
* Destructor for format type
|
|
*/
|
|
void (*destroy) (const struct format_type * fmt);
|
|
};
|
|
|
|
/*
|
|
* Utility functions
|
|
*/
|
|
unsigned long set_pe_align(struct physical_volume *pv, unsigned long data_alignment);
|
|
unsigned long set_pe_align_offset(struct physical_volume *pv,
|
|
unsigned long data_alignment_offset);
|
|
int vg_validate(struct volume_group *vg);
|
|
|
|
int pv_write_orphan(struct cmd_context *cmd, struct physical_volume *pv);
|
|
|
|
/* Manipulate PV structures */
|
|
int pv_add(struct volume_group *vg, struct physical_volume *pv);
|
|
int pv_remove(struct volume_group *vg, struct physical_volume *pv);
|
|
struct physical_volume *pv_find(struct volume_group *vg, const char *pv_name);
|
|
|
|
/* Find a PV within a given VG */
|
|
int get_pv_from_vg_by_id(const struct format_type *fmt, const char *vg_name,
|
|
const char *vgid, const char *pvid,
|
|
struct physical_volume *pv);
|
|
|
|
struct lv_list *find_lv_in_vg_by_lvid(struct volume_group *vg,
|
|
const union lvid *lvid);
|
|
|
|
struct lv_list *find_lv_in_lv_list(const struct dm_list *ll,
|
|
const struct logical_volume *lv);
|
|
|
|
/* Return the VG that contains a given LV (based on path given in lv_name) */
|
|
/* or environment var */
|
|
struct volume_group *find_vg_with_lv(const char *lv_name);
|
|
|
|
/* Find LV with given lvid (used during activation) */
|
|
struct logical_volume *lv_from_lvid(struct cmd_context *cmd,
|
|
const char *lvid_s,
|
|
unsigned precommitted);
|
|
|
|
/* FIXME Merge these functions with ones above */
|
|
struct physical_volume *find_pv(struct volume_group *vg, struct device *dev);
|
|
|
|
struct pv_list *find_pv_in_pv_list(const struct dm_list *pl,
|
|
const struct physical_volume *pv);
|
|
|
|
/* Find LV segment containing given LE */
|
|
struct lv_segment *find_seg_by_le(const struct logical_volume *lv, uint32_t le);
|
|
|
|
/*
|
|
* Remove a dev_dir if present.
|
|
*/
|
|
const char *strip_dir(const char *vg_name, const char *dir);
|
|
|
|
struct logical_volume *alloc_lv(struct dm_pool *mem);
|
|
|
|
/*
|
|
* Checks that an lv has no gaps or overlapping segments.
|
|
* Set complete_vg to perform additional VG level checks.
|
|
*/
|
|
int check_lv_segments(struct logical_volume *lv, int complete_vg);
|
|
|
|
|
|
/*
|
|
* Checks that a replicator segment is correct.
|
|
*/
|
|
int check_replicator_segment(const struct lv_segment *replicator_seg);
|
|
|
|
/*
|
|
* Sometimes (eg, after an lvextend), it is possible to merge two
|
|
* adjacent segments into a single segment. This function trys
|
|
* to merge as many segments as possible.
|
|
*/
|
|
int lv_merge_segments(struct logical_volume *lv);
|
|
|
|
/*
|
|
* Ensure there's a segment boundary at a given LE, splitting if necessary
|
|
*/
|
|
int lv_split_segment(struct logical_volume *lv, uint32_t le);
|
|
|
|
/*
|
|
* Add/remove upward link from underlying LV to the segment using it
|
|
* FIXME: ridiculously long name
|
|
*/
|
|
int add_seg_to_segs_using_this_lv(struct logical_volume *lv, struct lv_segment *seg);
|
|
int remove_seg_from_segs_using_this_lv(struct logical_volume *lv, struct lv_segment *seg);
|
|
struct lv_segment *get_only_segment_using_this_lv(struct logical_volume *lv);
|
|
|
|
/*
|
|
* Count snapshot LVs.
|
|
*/
|
|
unsigned snapshot_count(const struct volume_group *vg);
|
|
|
|
/*
|
|
* Calculate readahead from underlying PV devices
|
|
*/
|
|
void lv_calculate_readahead(const struct logical_volume *lv, uint32_t *read_ahead);
|
|
|
|
/*
|
|
* For internal metadata caching.
|
|
*/
|
|
int export_vg_to_buffer(struct volume_group *vg, char **buf);
|
|
struct volume_group *import_vg_from_buffer(char *buf,
|
|
struct format_instance *fid);
|
|
|
|
/*
|
|
* Mirroring functions
|
|
*/
|
|
|
|
/*
|
|
* Given mirror image or mirror log segment, find corresponding mirror segment
|
|
*/
|
|
int fixup_imported_mirrors(struct volume_group *vg);
|
|
|
|
/*
|
|
* Begin skeleton for external LVM library
|
|
*/
|
|
struct id pv_id(const struct physical_volume *pv);
|
|
const struct format_type *pv_format_type(const struct physical_volume *pv);
|
|
struct id pv_vgid(const struct physical_volume *pv);
|
|
|
|
struct physical_volume *pv_by_path(struct cmd_context *cmd, const char *pv_name);
|
|
int add_pv_to_vg(struct volume_group *vg, const char *pv_name,
|
|
struct physical_volume *pv);
|
|
int vg_mark_partial_lvs(struct volume_group *vg);
|
|
int is_mirror_image_removable(struct logical_volume *mimage_lv, void *baton);
|
|
|
|
#endif
|