#define _LVM_METADATA_EXPORTED_H
#include "uuid.h"
+#include "vg.h"
#define MAX_STRIPES 128U
#define SECTOR_SHIFT 9L
#define VGMETADATACOPIES_UNMANAGED 0
/* Ordered list - see lv_manip.c */
-typedef enum {
- ALLOC_INVALID,
- ALLOC_CONTIGUOUS,
- ALLOC_CLING,
- ALLOC_NORMAL,
- ALLOC_ANYWHERE,
- ALLOC_INHERIT
-} alloc_policy_t;
-
typedef enum {
AREA_UNASSIGNED,
AREA_PV,
void *private;
};
-struct volume_group {
- struct cmd_context *cmd;
- struct dm_pool *vgmem;
- struct format_instance *fid;
- struct dm_list *cmd_vgs;/* List of wanted/locked and opened VGs */
- uint32_t cmd_missing_vgs;/* Flag marks missing VG */
- uint32_t seqno; /* Metadata sequence number */
-
- alloc_policy_t alloc;
- uint64_t status;
-
- struct id id;
- char *name;
- char *old_name; /* Set during vgrename and vgcfgrestore */
- char *system_id;
-
- uint32_t extent_size;
- uint32_t extent_count;
- uint32_t free_count;
-
- uint32_t max_lv;
- uint32_t max_pv;
-
- /* physical volumes */
- uint32_t pv_count;
- struct dm_list pvs;
-
- /*
- * logical volumes
- * The following relationship should always hold:
- * dm_list_size(lvs) = user visible lv_count + snapshot_count + other invisible LVs
- *
- * Snapshots consist of 2 instances of "struct logical_volume":
- * - cow (lv_name is visible to the user)
- * - snapshot (lv_name is 'snapshotN')
- *
- * Mirrors consist of multiple instances of "struct logical_volume":
- * - one for the mirror log
- * - one for each mirror leg
- * - one for the user-visible mirror LV
- */
- struct dm_list lvs;
-
- struct dm_list tags;
-
- /*
- * FIXME: Move the next fields into a different struct?
- */
-
- /*
- * List of removed physical volumes by pvreduce.
- * They have to get cleared on vg_commit.
- */
- struct dm_list removed_pvs;
- uint32_t open_mode; /* FIXME: read or write - check lock type? */
-
- /*
- * Store result of the last vg_read().
- * 0 for success else appropriate FAILURE_* bits set.
- */
- uint32_t read_status;
- uint32_t mda_copies; /* target number of mdas for this VG */
-};
-
/* There will be one area for each stripe */
struct lv_segment_area {
area_type_t type;
int is_orphan_vg(const char *vg_name);
int is_orphan(const struct physical_volume *pv);
int is_missing_pv(const struct physical_volume *pv);
+int vg_missing_pv_count(const struct volume_group *vg);
int vgs_are_compatible(struct cmd_context *cmd,
struct volume_group *vg_from,
struct volume_group *vg_to);
struct pvcreate_params *pp);
int vg_reduce(struct volume_group *vg, char *pv_name);
int vg_change_tag(struct volume_group *vg, const char *tag, int add_tag);
-int vg_set_extent_size(struct volume_group *vg, uint32_t new_extent_size);
-int vg_set_max_lv(struct volume_group *vg, uint32_t max_lv);
-int vg_set_max_pv(struct volume_group *vg, uint32_t max_pv);
-int vg_set_alloc_policy(struct volume_group *vg, alloc_policy_t alloc);
-int vg_set_clustered(struct volume_group *vg, int clustered);
int vg_split_mdas(struct cmd_context *cmd, struct volume_group *vg_from,
struct volume_group *vg_to);
/* FIXME: Investigate refactoring these functions to take a pv ISO pv_list */
int vg_check_status(const struct volume_group *vg, uint64_t status);
-/*
- * Returns visible LV count - number of LVs from user perspective
- */
-unsigned vg_visible_lvs(const struct volume_group *vg);
/*
* Check if the VG reached maximal LVs count (if set)
uint64_t lv_size(const struct logical_volume *lv);
-int vg_missing_pv_count(const struct volume_group *vg);
-uint32_t vg_seqno(const struct volume_group *vg);
-uint64_t vg_status(const struct volume_group *vg);
-uint64_t vg_size(const struct volume_group *vg);
-uint64_t vg_free(const struct volume_group *vg);
-uint64_t vg_extent_size(const struct volume_group *vg);
-uint64_t vg_extent_count(const struct volume_group *vg);
-uint64_t vg_free_count(const struct volume_group *vg);
-uint64_t vg_pv_count(const struct volume_group *vg);
-uint64_t vg_max_pv(const struct volume_group *vg);
-uint64_t vg_max_lv(const struct volume_group *vg);
-uint32_t vg_mda_count(const struct volume_group *vg);
-uint32_t vg_mda_used_count(const struct volume_group *vg);
-uint32_t vg_mda_copies(const struct volume_group *vg);
-int vg_set_mda_copies(struct volume_group *vg, uint32_t mda_copies);
int vg_check_write_mode(struct volume_group *vg);
#define vg_is_clustered(vg) (vg_status((vg)) & CLUSTERED)
#define vg_is_exported(vg) (vg_status((vg)) & EXPORTED_VG)
return (uint64_t) size / extent_size;
}
-static int _recalc_extents(uint32_t *extents, const char *desc1,
- const char *desc2, uint32_t old_size,
- uint32_t new_size)
-{
- uint64_t size = (uint64_t) old_size * (*extents);
-
- if (size % new_size) {
- log_error("New size %" PRIu64 " for %s%s not an exact number "
- "of new extents.", size, desc1, desc2);
- return 0;
- }
-
- size /= new_size;
-
- if (size > UINT32_MAX) {
- log_error("New extent count %" PRIu64 " for %s%s exceeds "
- "32 bits.", size, desc1, desc2);
- return 0;
- }
-
- *extents = (uint32_t) size;
-
- return 1;
-}
-
static dm_bitset_t _bitset_with_random_bits(struct dm_pool *mem, uint32_t num_bits,
uint32_t num_set_bits, unsigned *seed)
{
return 1;
}
-uint32_t vg_mda_copies(const struct volume_group *vg)
-{
- return vg->mda_copies;
-}
-
-int vg_set_mda_copies(struct volume_group *vg, uint32_t mda_copies)
-{
- vg->mda_copies = mda_copies;
-
- /* FIXME Use log_verbose when this is due to specific cmdline request. */
- log_debug("Setting mda_copies to %"PRIu32" for VG %s",
- mda_copies, vg->name);
-
- return 1;
-}
-
uint64_t find_min_mda_size(struct dm_list *mdas)
{
uint64_t min_mda_size = UINT64_MAX, mda_size;
return min_mda_size;
}
-uint64_t vg_mda_size(const struct volume_group *vg)
-{
- return find_min_mda_size(&vg->fid->metadata_areas_in_use);
-}
-
-uint64_t vg_mda_free(const struct volume_group *vg)
-{
- uint64_t freespace = UINT64_MAX, mda_free;
- struct metadata_area *mda;
-
- dm_list_iterate_items(mda, &vg->fid->metadata_areas_in_use) {
- if (!mda->ops->mda_free_sectors)
- continue;
- mda_free = mda->ops->mda_free_sectors(mda);
- if (mda_free < freespace)
- freespace = mda_free;
- }
-
- if (freespace == UINT64_MAX)
- freespace = UINT64_C(0);
- return freespace;
-}
-
-int vg_set_extent_size(struct volume_group *vg, uint32_t new_size)
-{
- uint32_t old_size = vg->extent_size;
- struct pv_list *pvl;
- struct lv_list *lvl;
- struct physical_volume *pv;
- struct logical_volume *lv;
- struct lv_segment *seg;
- struct pv_segment *pvseg;
- uint32_t s;
-
- if (!vg_is_resizeable(vg)) {
- log_error("Volume group \"%s\" must be resizeable "
- "to change PE size", vg->name);
- return 0;
- }
-
- if (!new_size) {
- log_error("Physical extent size may not be zero");
- return 0;
- }
-
- if (new_size == vg->extent_size)
- return 1;
-
- if (new_size & (new_size - 1)) {
- log_error("Physical extent size must be a power of 2.");
- return 0;
- }
-
- if (new_size > vg->extent_size) {
- if ((uint64_t) vg_size(vg) % new_size) {
- /* FIXME Adjust used PV sizes instead */
- log_error("New extent size is not a perfect fit");
- return 0;
- }
- }
-
- vg->extent_size = new_size;
-
- if (vg->fid->fmt->ops->vg_setup &&
- !vg->fid->fmt->ops->vg_setup(vg->fid, vg))
- return_0;
-
- if (!_recalc_extents(&vg->extent_count, vg->name, "", old_size,
- new_size))
- return_0;
-
- if (!_recalc_extents(&vg->free_count, vg->name, " free space",
- old_size, new_size))
- return_0;
-
- /* foreach PV */
- dm_list_iterate_items(pvl, &vg->pvs) {
- pv = pvl->pv;
-
- pv->pe_size = new_size;
- if (!_recalc_extents(&pv->pe_count, pv_dev_name(pv), "",
- old_size, new_size))
- return_0;
-
- if (!_recalc_extents(&pv->pe_alloc_count, pv_dev_name(pv),
- " allocated space", old_size, new_size))
- return_0;
-
- /* foreach free PV Segment */
- dm_list_iterate_items(pvseg, &pv->segments) {
- if (pvseg_is_allocated(pvseg))
- continue;
-
- if (!_recalc_extents(&pvseg->pe, pv_dev_name(pv),
- " PV segment start", old_size,
- new_size))
- return_0;
- if (!_recalc_extents(&pvseg->len, pv_dev_name(pv),
- " PV segment length", old_size,
- new_size))
- return_0;
- }
- }
-
- /* foreach LV */
- dm_list_iterate_items(lvl, &vg->lvs) {
- lv = lvl->lv;
-
- if (!_recalc_extents(&lv->le_count, lv->name, "", old_size,
- new_size))
- return_0;
-
- dm_list_iterate_items(seg, &lv->segments) {
- if (!_recalc_extents(&seg->le, lv->name,
- " segment start", old_size,
- new_size))
- return_0;
-
- if (!_recalc_extents(&seg->len, lv->name,
- " segment length", old_size,
- new_size))
- return_0;
-
- if (!_recalc_extents(&seg->area_len, lv->name,
- " area length", old_size,
- new_size))
- return_0;
-
- if (!_recalc_extents(&seg->extents_copied, lv->name,
- " extents moved", old_size,
- new_size))
- return_0;
-
- /* foreach area */
- for (s = 0; s < seg->area_count; s++) {
- switch (seg_type(seg, s)) {
- case AREA_PV:
- if (!_recalc_extents
- (&seg_pe(seg, s),
- lv->name,
- " pvseg start", old_size,
- new_size))
- return_0;
- if (!_recalc_extents
- (&seg_pvseg(seg, s)->len,
- lv->name,
- " pvseg length", old_size,
- new_size))
- return_0;
- break;
- case AREA_LV:
- if (!_recalc_extents
- (&seg_le(seg, s), lv->name,
- " area start", old_size,
- new_size))
- return_0;
- break;
- case AREA_UNASSIGNED:
- log_error("Unassigned area %u found in "
- "segment", s);
- return 0;
- }
- }
- }
-
- }
-
- return 1;
-}
-
-int vg_set_max_lv(struct volume_group *vg, uint32_t max_lv)
-{
- if (!vg_is_resizeable(vg)) {
- log_error("Volume group \"%s\" must be resizeable "
- "to change MaxLogicalVolume", vg->name);
- return 0;
- }
-
- if (!(vg->fid->fmt->features & FMT_UNLIMITED_VOLS)) {
- if (!max_lv)
- max_lv = 255;
- else if (max_lv > 255) {
- log_error("MaxLogicalVolume limit is 255");
- return 0;
- }
- }
-
- if (max_lv && max_lv < vg_visible_lvs(vg)) {
- log_error("MaxLogicalVolume is less than the current number "
- "%d of LVs for %s", vg_visible_lvs(vg),
- vg->name);
- return 0;
- }
- vg->max_lv = max_lv;
-
- return 1;
-}
-
-int vg_set_max_pv(struct volume_group *vg, uint32_t max_pv)
-{
- if (!vg_is_resizeable(vg)) {
- log_error("Volume group \"%s\" must be resizeable "
- "to change MaxPhysicalVolumes", vg->name);
- return 0;
- }
-
- if (!(vg->fid->fmt->features & FMT_UNLIMITED_VOLS)) {
- if (!max_pv)
- max_pv = 255;
- else if (max_pv > 255) {
- log_error("MaxPhysicalVolume limit is 255");
- return 0;
- }
- }
-
- if (max_pv && max_pv < vg->pv_count) {
- log_error("MaxPhysicalVolumes is less than the current number "
- "%d of PVs for \"%s\"", vg->pv_count,
- vg->name);
- return 0;
- }
- vg->max_pv = max_pv;
- return 1;
-}
-
-int vg_set_alloc_policy(struct volume_group *vg, alloc_policy_t alloc)
-{
- if (alloc == ALLOC_INHERIT) {
- log_error("Volume Group allocation policy cannot inherit "
- "from anything");
- return 0;
- }
-
- if (alloc == vg->alloc)
- return 1;
-
- vg->alloc = alloc;
- return 1;
-}
-
-int vg_set_clustered(struct volume_group *vg, int clustered)
-{
- struct lv_list *lvl;
-
- /*
- * We do not currently support switching the cluster attribute
- * on active mirrors or snapshots.
- */
- dm_list_iterate_items(lvl, &vg->lvs) {
- if (lv_is_mirrored(lvl->lv) && lv_is_active(lvl->lv)) {
- log_error("Mirror logical volumes must be inactive "
- "when changing the cluster attribute.");
- return 0;
- }
-
- if (clustered) {
- if (lv_is_origin(lvl->lv) || lv_is_cow(lvl->lv)) {
- log_error("Volume group %s contains snapshots "
- "that are not yet supported.",
- vg->name);
- return 0;
- }
- }
-
- if ((lv_is_origin(lvl->lv) || lv_is_cow(lvl->lv)) &&
- lv_is_active(lvl->lv)) {
- log_error("Snapshot logical volumes must be inactive "
- "when changing the cluster attribute.");
- return 0;
- }
- }
-
- if (clustered)
- vg->status |= CLUSTERED;
- else
- vg->status &= ~CLUSTERED;
- return 1;
-}
-
static int _move_mdas(struct volume_group *vg_from, struct volume_group *vg_to,
struct dm_list *mdas_from, struct dm_list *mdas_to)
{
return 1;
}
-unsigned snapshot_count(const struct volume_group *vg)
-{
- struct lv_list *lvl;
- unsigned num_snapshots = 0;
-
- dm_list_iterate_items(lvl, &vg->lvs)
- if (lv_is_cow(lvl->lv))
- num_snapshots++;
-
- return num_snapshots;
-}
-
-unsigned vg_visible_lvs(const struct volume_group *vg)
-{
- struct lv_list *lvl;
- unsigned lv_count = 0;
-
- dm_list_iterate_items(lvl, &vg->lvs) {
- if (lv_is_visible(lvl->lv))
- lv_count++;
- }
-
- return lv_count;
-}
-
/*
* Determine whether two vgs are compatible for merging.
*/
return 1;
}
-uint32_t vg_seqno(const struct volume_group *vg)
-{
- return vg->seqno;
-}
-
-uint64_t vg_status(const struct volume_group *vg)
-{
- return vg->status;
-}
-
-uint64_t vg_size(const struct volume_group *vg)
-{
- return (uint64_t) vg->extent_count * vg->extent_size;
-}
-
-uint64_t vg_free(const struct volume_group *vg)
-{
- return (uint64_t) vg->free_count * vg->extent_size;
-}
-
-uint64_t vg_extent_size(const struct volume_group *vg)
-{
- return (uint64_t) vg->extent_size;
-}
-
-uint64_t vg_extent_count(const struct volume_group *vg)
-{
- return (uint64_t) vg->extent_count;
-}
-
-uint64_t vg_free_count(const struct volume_group *vg)
-{
- return (uint64_t) vg->free_count;
-}
-
-uint64_t vg_pv_count(const struct volume_group *vg)
-{
- return (uint64_t) vg->pv_count;
-}
-
-uint64_t vg_max_pv(const struct volume_group *vg)
-{
- return (uint64_t) vg->max_pv;
-}
-
-uint64_t vg_max_lv(const struct volume_group *vg)
-{
- return (uint64_t) vg->max_lv;
-}
-
-uint32_t vg_mda_count(const struct volume_group *vg)
-{
- return dm_list_size(&vg->fid->metadata_areas_in_use) +
- dm_list_size(&vg->fid->metadata_areas_ignored);
-}
-
-uint32_t vg_mda_used_count(const struct volume_group *vg)
-{
- uint32_t used_count = 0;
- struct metadata_area *mda;
-
- /*
- * Ignored mdas could be on either list - the reason being the state
- * may have changed from ignored to un-ignored and we need to write
- * the state to disk.
- */
- dm_list_iterate_items(mda, &vg->fid->metadata_areas_in_use)
- if (!mda_is_ignored(mda))
- used_count++;
-
- return used_count;
-}
-
uint64_t lv_size(const struct logical_volume *lv)
{
return lv->size;
git://sourceware.org / lvm2.git / commitdiff