mirror of
git://sourceware.org/git/lvm2.git
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66f79d05eb
mirror is not in-sync. This restriction is not extended to repair operations (i.e. it will not limit what 'lvconvert --repair' can do).
1957 lines
52 KiB
C
1957 lines
52 KiB
C
/*
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* Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2008 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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#include "lib.h"
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#include "metadata.h"
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#include "toolcontext.h"
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#include "segtype.h"
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#include "display.h"
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#include "archiver.h"
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#include "activate.h"
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#include "lv_alloc.h"
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#include "lvm-string.h"
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#include "str_list.h"
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#include "locking.h" /* FIXME Should not be used in this file */
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#include "memlock.h"
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#include "defaults.h" /* FIXME: should this be defaults.h? */
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/* These are necessary for _write_log_header() */
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#include "xlate.h"
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#define MIRROR_MAGIC 0x4D695272
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#define MIRROR_DISK_VERSION 2
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/* These are the flags that represent the mirror failure restoration policies */
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#define MIRROR_REMOVE 0
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#define MIRROR_ALLOCATE 1
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#define MIRROR_ALLOCATE_ANYWHERE 2
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/*
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* Returns true if the lv is temporary mirror layer for resync
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*/
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int is_temporary_mirror_layer(const struct logical_volume *lv)
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{
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if (lv->status & MIRROR_IMAGE
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&& lv->status & MIRRORED
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&& !(lv->status & LOCKED))
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return 1;
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return 0;
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}
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/*
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* Return a temporary LV for resyncing added mirror image.
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* Add other mirror legs to lvs list.
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*/
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struct logical_volume *find_temporary_mirror(const struct logical_volume *lv)
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{
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struct lv_segment *seg;
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if (!(lv->status & MIRRORED))
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return NULL;
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seg = first_seg(lv);
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/* Temporary mirror is always area_num == 0 */
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if (seg_type(seg, 0) == AREA_LV &&
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is_temporary_mirror_layer(seg_lv(seg, 0)))
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return seg_lv(seg, 0);
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return NULL;
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}
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/*
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* Returns the number of mirrors of the LV
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*/
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uint32_t lv_mirror_count(const struct logical_volume *lv)
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{
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struct lv_segment *seg;
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uint32_t s, mirrors;
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if (!(lv->status & MIRRORED))
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return 1;
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seg = first_seg(lv);
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mirrors = seg->area_count;
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for (s = 0; s < seg->area_count; s++) {
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if (seg_type(seg, s) != AREA_LV)
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continue;
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if (is_temporary_mirror_layer(seg_lv(seg, s)))
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mirrors += lv_mirror_count(seg_lv(seg, s)) - 1;
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}
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return mirrors;
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}
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struct lv_segment *find_mirror_seg(struct lv_segment *seg)
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{
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struct lv_segment *mirror_seg;
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mirror_seg = get_only_segment_using_this_lv(seg->lv);
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if (!mirror_seg) {
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log_error("Failed to find mirror_seg for %s", seg->lv->name);
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return NULL;
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}
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if (!seg_is_mirrored(mirror_seg)) {
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log_error("%s on %s is not a mirror segments",
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mirror_seg->lv->name, seg->lv->name);
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return NULL;
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}
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return mirror_seg;
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}
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/*
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* Reduce the region size if necessary to ensure
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* the volume size is a multiple of the region size.
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*/
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uint32_t adjusted_mirror_region_size(uint32_t extent_size, uint32_t extents,
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uint32_t region_size)
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{
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uint64_t region_max;
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region_max = (1 << (ffs((int)extents) - 1)) * (uint64_t) extent_size;
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if (region_max < UINT32_MAX && region_size > region_max) {
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region_size = (uint32_t) region_max;
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log_print("Using reduced mirror region size of %" PRIu32
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" sectors", region_size);
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}
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return region_size;
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}
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/*
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* shift_mirror_images
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* @mirrored_seg
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* @mimage: The position (index) of the image to move to the end
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*
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* When dealing with removal of legs, we often move a 'removable leg'
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* to the back of the 'areas' array. It is critically important not
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* to simply swap it for the last area in the array. This would have
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* the affect of reordering the remaining legs - altering position of
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* the primary. So, we must shuffle all of the areas in the array
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* to maintain their relative position before moving the 'removable
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* leg' to the end.
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*
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* Short illustration of the problem:
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* - Mirror consists of legs A, B, C and we want to remove A
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* - We swap A and C and then remove A, leaving C, B
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* This scenario is problematic in failure cases where A dies, because
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* B becomes the primary. If the above happens, we effectively throw
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* away any changes made between the time of failure and the time of
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* restructuring the mirror.
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*
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* So, any time we want to move areas to the end to be removed, use
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* this function.
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*/
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int shift_mirror_images(struct lv_segment *mirrored_seg, unsigned mimage)
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{
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int i;
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struct lv_segment_area area;
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if (mimage >= mirrored_seg->area_count) {
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log_error("Invalid index (%u) of mirror image supplied "
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"to shift_mirror_images()", mimage);
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return 0;
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}
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area = mirrored_seg->areas[mimage];
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/* Shift remaining images down to fill the hole */
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for (i = mimage + 1; i < mirrored_seg->area_count; i++)
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mirrored_seg->areas[i-1] = mirrored_seg->areas[i];
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/* Place this one at the end */
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mirrored_seg->areas[i-1] = area;
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return 1;
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}
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/*
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* This function writes a new header to the mirror log header to the lv
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*
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* Returns: 1 on success, 0 on failure
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*/
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static int _write_log_header(struct cmd_context *cmd, struct logical_volume *lv)
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{
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struct device *dev;
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char *name;
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struct { /* The mirror log header */
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uint32_t magic;
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uint32_t version;
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uint64_t nr_regions;
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} log_header;
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log_header.magic = xlate32(MIRROR_MAGIC);
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log_header.version = xlate32(MIRROR_DISK_VERSION);
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log_header.nr_regions = xlate64((uint64_t)-1);
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if (!(name = dm_pool_alloc(cmd->mem, PATH_MAX))) {
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log_error("Name allocation failed - log header not written (%s)",
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lv->name);
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return 0;
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}
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if (dm_snprintf(name, PATH_MAX, "%s%s/%s", cmd->dev_dir,
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lv->vg->name, lv->name) < 0) {
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log_error("Name too long - log header not written (%s)", lv->name);
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return 0;
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}
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log_verbose("Writing log header to device, %s", lv->name);
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if (!(dev = dev_cache_get(name, NULL))) {
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log_error("%s: not found: log header not written", name);
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return 0;
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}
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if (!dev_open_quiet(dev))
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return 0;
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if (!dev_write(dev, UINT64_C(0), sizeof(log_header), &log_header)) {
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log_error("Failed to write log header to %s", name);
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dev_close_immediate(dev);
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return 0;
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}
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dev_close_immediate(dev);
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return 1;
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}
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/*
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* Initialize mirror log contents
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*/
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static int _init_mirror_log(struct cmd_context *cmd,
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struct logical_volume *log_lv, int in_sync,
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struct dm_list *tags, int remove_on_failure)
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{
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struct str_list *sl;
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struct lvinfo info;
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uint64_t orig_status = log_lv->status;
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int was_active = 0;
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if (!activation() && in_sync) {
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log_error("Aborting. Unable to create in-sync mirror log "
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"while activation is disabled.");
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return 0;
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}
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/* If the LV is active, deactivate it first. */
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if (lv_info(cmd, log_lv, &info, 0, 0) && info.exists) {
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(void)deactivate_lv(cmd, log_lv);
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/*
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* FIXME: workaround to fail early
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* Ensure that log is really deactivated because deactivate_lv
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* on cluster do not fail if there is log_lv with different UUID.
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*/
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if (lv_info(cmd, log_lv, &info, 0, 0) && info.exists) {
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log_error("Aborting. Unable to deactivate mirror log.");
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goto revert_new_lv;
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}
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was_active = 1;
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}
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/* Temporary make it visible for set_lv() */
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lv_set_visible(log_lv);
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/* Temporary tag mirror log for activation */
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dm_list_iterate_items(sl, tags)
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if (!str_list_add(cmd->mem, &log_lv->tags, sl->str)) {
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log_error("Aborting. Unable to tag mirror log.");
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goto activate_lv;
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}
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/* store mirror log on disk(s) */
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if (!vg_write(log_lv->vg) || !vg_commit(log_lv->vg))
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goto activate_lv;
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backup(log_lv->vg);
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if (!activate_lv(cmd, log_lv)) {
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log_error("Aborting. Failed to activate mirror log.");
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goto revert_new_lv;
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}
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/* Remove the temporary tags */
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dm_list_iterate_items(sl, tags)
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if (!str_list_del(&log_lv->tags, sl->str))
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log_error("Failed to remove tag %s from mirror log.",
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sl->str);
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if (activation() && !set_lv(cmd, log_lv, log_lv->size,
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in_sync ? -1 : 0)) {
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log_error("Aborting. Failed to wipe mirror log.");
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goto deactivate_and_revert_new_lv;
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}
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if (activation() && !_write_log_header(cmd, log_lv)) {
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log_error("Aborting. Failed to write mirror log header.");
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goto deactivate_and_revert_new_lv;
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}
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if (!deactivate_lv(cmd, log_lv)) {
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log_error("Aborting. Failed to deactivate mirror log. "
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"Manual intervention required.");
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return 0;
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}
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lv_set_hidden(log_lv);
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if (was_active && !activate_lv(cmd, log_lv))
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return_0;
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return 1;
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deactivate_and_revert_new_lv:
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if (!deactivate_lv(cmd, log_lv)) {
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log_error("Unable to deactivate mirror log LV. "
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"Manual intervention required.");
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return 0;
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}
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revert_new_lv:
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log_lv->status = orig_status;
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dm_list_iterate_items(sl, tags)
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if (!str_list_del(&log_lv->tags, sl->str))
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log_error("Failed to remove tag %s from mirror log.",
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sl->str);
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if (remove_on_failure && !lv_remove(log_lv)) {
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log_error("Manual intervention may be required to remove "
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"abandoned log LV before retrying.");
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return 0;
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}
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if (!vg_write(log_lv->vg) || !vg_commit(log_lv->vg))
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log_error("Manual intervention may be required to "
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"remove/restore abandoned log LV before retrying.");
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else
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backup(log_lv->vg);
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activate_lv:
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if (was_active && !remove_on_failure && !activate_lv(cmd, log_lv))
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return_0;
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return 0;
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}
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/*
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* Delete independent/orphan LV, it must acquire lock.
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*/
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static int _delete_lv(struct logical_volume *mirror_lv, struct logical_volume *lv)
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{
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struct cmd_context *cmd = mirror_lv->vg->cmd;
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struct str_list *sl;
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/* Inherit tags - maybe needed for activation */
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if (!str_list_match_list(&mirror_lv->tags, &lv->tags)) {
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dm_list_iterate_items(sl, &mirror_lv->tags)
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if (!str_list_add(cmd->mem, &lv->tags, sl->str)) {
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log_error("Aborting. Unable to tag.");
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return 0;
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}
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if (!vg_write(mirror_lv->vg) ||
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!vg_commit(mirror_lv->vg)) {
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log_error("Intermediate VG commit for orphan volume failed.");
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return 0;
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}
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}
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if (!activate_lv(cmd, lv))
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return_0;
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if (!deactivate_lv(cmd, lv))
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return_0;
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if (!lv_remove(lv))
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return_0;
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return 1;
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}
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static int _merge_mirror_images(struct logical_volume *lv,
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const struct dm_list *mimages)
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{
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uint32_t addition = dm_list_size(mimages);
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struct logical_volume **img_lvs;
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struct lv_list *lvl;
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int i = 0;
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if (!addition)
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return 1;
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if (!(img_lvs = alloca(sizeof(*img_lvs) * addition)))
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return_0;
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dm_list_iterate_items(lvl, mimages)
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img_lvs[i++] = lvl->lv;
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return lv_add_mirror_lvs(lv, img_lvs, addition,
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MIRROR_IMAGE, first_seg(lv)->region_size);
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}
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/* Unlink the relationship between the segment and its log_lv */
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struct logical_volume *detach_mirror_log(struct lv_segment *mirrored_seg)
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{
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struct logical_volume *log_lv;
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if (!mirrored_seg->log_lv)
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return NULL;
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log_lv = mirrored_seg->log_lv;
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mirrored_seg->log_lv = NULL;
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lv_set_visible(log_lv);
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log_lv->status &= ~MIRROR_LOG;
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remove_seg_from_segs_using_this_lv(log_lv, mirrored_seg);
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return log_lv;
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}
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/* Check if mirror image LV is removable with regard to given removable_pvs */
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static int _is_mirror_image_removable(struct logical_volume *mimage_lv,
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struct dm_list *removable_pvs)
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{
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struct physical_volume *pv;
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struct lv_segment *seg;
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int pv_found;
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struct pv_list *pvl;
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uint32_t s;
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dm_list_iterate_items(seg, &mimage_lv->segments) {
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for (s = 0; s < seg->area_count; s++) {
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if (seg_type(seg, s) != AREA_PV) {
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/* FIXME Recurse for AREA_LV? */
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/* Structure of seg_lv is unknown.
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* Not removing this LV for safety. */
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return 0;
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}
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pv = seg_pv(seg, s);
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pv_found = 0;
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dm_list_iterate_items(pvl, removable_pvs) {
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if (id_equal(&pv->id, &pvl->pv->id)) {
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pv_found = 1;
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break;
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}
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if (pvl->pv->dev && pv->dev &&
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pv->dev->dev == pvl->pv->dev->dev) {
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pv_found = 1;
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break;
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}
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}
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if (!pv_found)
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return 0;
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}
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}
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return 1;
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}
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/*
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* _move_removable_mimages_to_end
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*
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* We always detach mimage LVs from the end of the areas array.
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* This function will push 'count' mimages to the end of the array
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* based on if their PVs are removable.
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*
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* This is an all or nothing function. Either the user specifies
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* enough removable PVs to satisfy count, or they don't specify
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* any removable_pvs at all (in which case all PVs in the mirror
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* are considered removable).
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*/
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static int _move_removable_mimages_to_end(struct logical_volume *lv,
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uint32_t count,
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struct dm_list *removable_pvs)
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{
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int i, images;
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struct logical_volume *sub_lv;
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struct lv_segment *mirrored_seg = first_seg(lv);
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if (!removable_pvs)
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return 1;
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/*
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* When we shift an image to the end, we must start from
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* the begining of the list again. We must visit the
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* images up to the last one we just moved.
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*/
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for (images = mirrored_seg->area_count; images && count; images--) {
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for (i = 0; i < images; i++) {
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sub_lv = seg_lv(mirrored_seg, i);
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if (!is_temporary_mirror_layer(sub_lv) &&
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_is_mirror_image_removable(sub_lv, removable_pvs)) {
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if (!shift_mirror_images(mirrored_seg, i))
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return_0;
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count--;
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break;
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}
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}
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/* Did we shift any images? */
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if (i == images)
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return 0;
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}
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return !count;
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}
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static int _mirrored_lv_in_sync(struct logical_volume *lv)
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{
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float sync_percent;
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percent_range_t percent_range;
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if (!lv_mirror_percent(lv->vg->cmd, lv, 0, &sync_percent,
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&percent_range, NULL)) {
|
|
log_error("Unable to determine mirror sync status of %s/%s.",
|
|
lv->vg->name, lv->name);
|
|
return 0;
|
|
}
|
|
|
|
return (percent_range == PERCENT_100) ? 1 : 0;
|
|
}
|
|
|
|
/*
|
|
* Split off 'split_count' legs from a mirror
|
|
*
|
|
* Returns: 0 on error, 1 on success
|
|
*/
|
|
static int _split_mirror_images(struct logical_volume *lv,
|
|
const char *split_name,
|
|
uint32_t split_count,
|
|
struct dm_list *removable_pvs)
|
|
{
|
|
uint32_t i;
|
|
struct logical_volume *sub_lv, *new_lv = NULL;
|
|
struct logical_volume *detached_log_lv = NULL;
|
|
struct logical_volume *lv1 = NULL;
|
|
struct lv_segment *mirrored_seg = first_seg(lv);
|
|
struct dm_list split_images;
|
|
struct lv_list *lvl;
|
|
|
|
if (!(lv->status & MIRRORED)) {
|
|
log_error("Unable to split non-mirrored LV, %s",
|
|
lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!split_count) {
|
|
log_error("split_count is zero!");
|
|
return 0;
|
|
}
|
|
|
|
log_verbose("Detaching %d images from mirror, %s",
|
|
split_count, lv->name);
|
|
|
|
if (!_move_removable_mimages_to_end(lv, split_count, removable_pvs)) {
|
|
/*
|
|
* FIXME: Allow incomplete specification of removable PVs?
|
|
*
|
|
* I am forcing the user to either specify no
|
|
* removable PVs or all of them. Should we allow
|
|
* them to just specify some - making us pick the rest?
|
|
*/
|
|
log_error("Insufficient removable PVs given"
|
|
" to satisfy request");
|
|
return 0;
|
|
}
|
|
|
|
dm_list_init(&split_images);
|
|
for (i = 0; i < split_count; i++) {
|
|
mirrored_seg->area_count--;
|
|
sub_lv = seg_lv(mirrored_seg, mirrored_seg->area_count);
|
|
|
|
sub_lv->status &= ~MIRROR_IMAGE;
|
|
lv_set_visible(sub_lv);
|
|
release_lv_segment_area(mirrored_seg, mirrored_seg->area_count,
|
|
mirrored_seg->area_len);
|
|
|
|
if (!new_lv) {
|
|
new_lv = sub_lv;
|
|
new_lv->name = dm_pool_strdup(lv->vg->cmd->mem,
|
|
split_name);
|
|
if (!new_lv->name) {
|
|
log_error("Unable to rename newly split LV");
|
|
return 0;
|
|
}
|
|
} else {
|
|
lvl = dm_pool_alloc(lv->vg->cmd->mem, sizeof(*lvl));
|
|
if (!lvl) {
|
|
log_error("lv_list alloc failed");
|
|
return 0;
|
|
}
|
|
lvl->lv = sub_lv;
|
|
dm_list_add(&split_images, &lvl->list);
|
|
}
|
|
}
|
|
|
|
if (!dm_list_empty(&split_images)) {
|
|
size_t len = strlen(new_lv->name) + 32;
|
|
char *layer_name, format[len];
|
|
|
|
if (!insert_layer_for_lv(lv->vg->cmd, new_lv,
|
|
0, "_mimage_%d")) {
|
|
log_error("Failed to build new mirror, %s",
|
|
new_lv->name);
|
|
return 0;
|
|
}
|
|
|
|
first_seg(new_lv)->region_size = mirrored_seg->region_size;
|
|
|
|
dm_list_iterate_items(lvl, &split_images) {
|
|
sub_lv = lvl->lv;
|
|
|
|
dm_snprintf(format, len, "%s_mimage_%%d",
|
|
new_lv->name);
|
|
|
|
layer_name = dm_pool_alloc(lv->vg->cmd->mem, len);
|
|
if (!layer_name) {
|
|
log_error("Unable to allocate memory");
|
|
return 0;
|
|
}
|
|
if (!generate_lv_name(lv->vg, format, layer_name, len)||
|
|
sscanf(layer_name, format, &i) != 1) {
|
|
log_error("Failed to generate new image names");
|
|
return 0;
|
|
}
|
|
sub_lv->name = layer_name;
|
|
}
|
|
|
|
if (!_merge_mirror_images(new_lv, &split_images)) {
|
|
log_error("Failed to group split "
|
|
"images into new mirror");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We don't allow splitting a mirror that is not in-sync,
|
|
* so we can bring the newly split mirror up without a
|
|
* resync. (It will be a 'core' log mirror after all.)
|
|
*/
|
|
init_mirror_in_sync(1);
|
|
}
|
|
|
|
/* If no more mirrors, remove mirror layer */
|
|
if (mirrored_seg->area_count == 1) {
|
|
lv1 = seg_lv(mirrored_seg, 0);
|
|
lv1->status &= ~MIRROR_IMAGE;
|
|
lv_set_visible(lv1);
|
|
detached_log_lv = detach_mirror_log(mirrored_seg);
|
|
if (!remove_layer_from_lv(lv, lv1))
|
|
return_0;
|
|
lv->status &= ~MIRRORED;
|
|
lv->status &= ~MIRROR_NOTSYNCED;
|
|
}
|
|
|
|
if (!vg_write(mirrored_seg->lv->vg)) {
|
|
log_error("Intermediate VG metadata write failed.");
|
|
return 0;
|
|
}
|
|
|
|
if (!suspend_lv(mirrored_seg->lv->vg->cmd, mirrored_seg->lv)) {
|
|
log_error("Failed to lock %s", mirrored_seg->lv->name);
|
|
vg_revert(mirrored_seg->lv->vg);
|
|
return 0;
|
|
}
|
|
|
|
if (!vg_commit(mirrored_seg->lv->vg)) {
|
|
resume_lv(mirrored_seg->lv->vg->cmd, mirrored_seg->lv);
|
|
return 0;
|
|
}
|
|
|
|
log_very_verbose("Updating \"%s\" in kernel", mirrored_seg->lv->name);
|
|
|
|
/*
|
|
* If we have split off a mirror instead of linear (i.e. the
|
|
* split_images list is not empty), then we must perform a
|
|
* resume to get the mirror started.
|
|
*/
|
|
if (!dm_list_empty(&split_images) && !resume_lv(lv->vg->cmd, new_lv)) {
|
|
log_error("Failed to resume newly split LV, %s", new_lv->name);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Avoid having same mirror target loaded twice simultaneously by first
|
|
* resuming the removed LV which now contains an error segment.
|
|
* As it's now detached from mirrored_seg->lv we must resume it
|
|
* explicitly.
|
|
*/
|
|
if (lv1 && !resume_lv(lv1->vg->cmd, lv1)) {
|
|
log_error("Problem resuming temporary LV, %s", lv1->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!resume_lv(mirrored_seg->lv->vg->cmd, mirrored_seg->lv)) {
|
|
log_error("Problem reactivating %s", mirrored_seg->lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (lv1 && !_delete_lv(lv, lv1))
|
|
return_0;
|
|
|
|
if (detached_log_lv && !_delete_lv(lv, detached_log_lv))
|
|
return_0;
|
|
|
|
log_very_verbose("%" PRIu32 " image(s) detached from %s",
|
|
split_count, lv->name);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Remove num_removed images from mirrored_seg
|
|
*
|
|
* Arguments:
|
|
* num_removed: the requested (maximum) number of mirrors to be removed
|
|
* removable_pvs: if not NULL and list not empty, only mirrors using PVs
|
|
* in this list will be removed
|
|
* remove_log: if non-zero, log_lv will be removed
|
|
* (even if it's 0, log_lv will be removed if there is no
|
|
* mirror remaining after the removal)
|
|
* collapse: if non-zero, instead of removing, remove the temporary
|
|
* mirror layer and merge mirrors to the original LV.
|
|
* removable_pvs should be NULL and num_removed should be
|
|
* seg->area_count - 1.
|
|
* removed: if non NULL, the number of removed mirror images is set
|
|
* as a result
|
|
*
|
|
* If collapse is non-zero, <removed> is guaranteed to be equal to num_removed.
|
|
*
|
|
* Return values:
|
|
* Failure (0) means something unexpected has happend and
|
|
* the caller should abort.
|
|
* Even if no mirror was removed (e.g. no LV matches to 'removable_pvs'),
|
|
* returns success (1).
|
|
*/
|
|
static int _remove_mirror_images(struct logical_volume *lv,
|
|
uint32_t num_removed,
|
|
struct dm_list *removable_pvs,
|
|
unsigned remove_log, unsigned collapse,
|
|
uint32_t *removed)
|
|
{
|
|
uint32_t m;
|
|
int32_t s;
|
|
int removable_pvs_specified;
|
|
struct logical_volume *sub_lv;
|
|
struct logical_volume *detached_log_lv = NULL;
|
|
struct logical_volume *temp_layer_lv = NULL;
|
|
struct lv_segment *mirrored_seg = first_seg(lv);
|
|
uint32_t old_area_count = mirrored_seg->area_count;
|
|
uint32_t new_area_count = mirrored_seg->area_count;
|
|
struct lv_list *lvl;
|
|
struct dm_list tmp_orphan_lvs;
|
|
|
|
removable_pvs_specified = (removable_pvs &&
|
|
!dm_list_empty(removable_pvs)) ? 1 : 0;
|
|
|
|
if (removed)
|
|
*removed = 0;
|
|
|
|
log_very_verbose("Reducing mirror set from %" PRIu32 " to %"
|
|
PRIu32 " image(s)%s.",
|
|
old_area_count, old_area_count - num_removed,
|
|
remove_log ? " and no log volume" : "");
|
|
|
|
if (collapse &&
|
|
(removable_pvs_specified || (old_area_count - num_removed != 1))) {
|
|
log_error("Incompatible parameters to _remove_mirror_images");
|
|
return 0;
|
|
}
|
|
|
|
/* Move removable_pvs to end of array */
|
|
if (removable_pvs_specified) {
|
|
for (s = mirrored_seg->area_count - 1;
|
|
s >= 0 && old_area_count - new_area_count < num_removed;
|
|
s--) {
|
|
sub_lv = seg_lv(mirrored_seg, s);
|
|
|
|
if (!is_temporary_mirror_layer(sub_lv) &&
|
|
_is_mirror_image_removable(sub_lv, removable_pvs)) {
|
|
/*
|
|
* Check if the user is trying to pull the
|
|
* primary mirror image when the mirror is
|
|
* not in-sync.
|
|
*/
|
|
if ((s == 0) && !_mirrored_lv_in_sync(lv) &&
|
|
!(lv->status & PARTIAL_LV)) {
|
|
log_error("Unable to remove primary mirror image while mirror is not in-sync");
|
|
return_0;
|
|
}
|
|
if (!shift_mirror_images(mirrored_seg, s))
|
|
return_0;
|
|
new_area_count--;
|
|
}
|
|
}
|
|
if (num_removed && old_area_count == new_area_count)
|
|
return 1;
|
|
} else
|
|
new_area_count = old_area_count - num_removed;
|
|
|
|
/* Remove mimage LVs from the segment */
|
|
dm_list_init(&tmp_orphan_lvs);
|
|
for (m = new_area_count; m < mirrored_seg->area_count; m++) {
|
|
seg_lv(mirrored_seg, m)->status &= ~MIRROR_IMAGE;
|
|
lv_set_visible(seg_lv(mirrored_seg, m));
|
|
if (!(lvl = dm_pool_alloc(lv->vg->cmd->mem, sizeof(*lvl)))) {
|
|
log_error("lv_list alloc failed");
|
|
return 0;
|
|
}
|
|
lvl->lv = seg_lv(mirrored_seg, m);
|
|
dm_list_add(&tmp_orphan_lvs, &lvl->list);
|
|
release_lv_segment_area(mirrored_seg, m, mirrored_seg->area_len);
|
|
}
|
|
mirrored_seg->area_count = new_area_count;
|
|
|
|
/* If no more mirrors, remove mirror layer */
|
|
/* As an exceptional case, if the lv is temporary layer,
|
|
* leave the LV as mirrored and let the lvconvert completion
|
|
* to remove the layer. */
|
|
if (new_area_count == 1 && !is_temporary_mirror_layer(lv)) {
|
|
temp_layer_lv = seg_lv(mirrored_seg, 0);
|
|
temp_layer_lv->status &= ~MIRROR_IMAGE;
|
|
lv_set_visible(temp_layer_lv);
|
|
detached_log_lv = detach_mirror_log(mirrored_seg);
|
|
if (!remove_layer_from_lv(lv, temp_layer_lv))
|
|
return_0;
|
|
lv->status &= ~MIRRORED;
|
|
lv->status &= ~MIRROR_NOTSYNCED;
|
|
if (collapse && !_merge_mirror_images(lv, &tmp_orphan_lvs)) {
|
|
log_error("Failed to add mirror images");
|
|
return 0;
|
|
}
|
|
} else if (new_area_count == 0) {
|
|
log_very_verbose("All mimages of %s are gone", lv->name);
|
|
|
|
/* All mirror images are gone.
|
|
* It can happen for vgreduce --removemissing. */
|
|
detached_log_lv = detach_mirror_log(mirrored_seg);
|
|
lv->status &= ~MIRRORED;
|
|
lv->status &= ~MIRROR_NOTSYNCED;
|
|
if (!replace_lv_with_error_segment(lv))
|
|
return_0;
|
|
} else if (remove_log)
|
|
detached_log_lv = detach_mirror_log(mirrored_seg);
|
|
|
|
/*
|
|
* To successfully remove these unwanted LVs we need to
|
|
* remove the LVs from the mirror set, commit that metadata
|
|
* then deactivate and remove them fully.
|
|
*/
|
|
|
|
if (!vg_write(mirrored_seg->lv->vg)) {
|
|
log_error("intermediate VG write failed.");
|
|
return 0;
|
|
}
|
|
|
|
if (!suspend_lv(mirrored_seg->lv->vg->cmd, mirrored_seg->lv)) {
|
|
log_error("Failed to lock %s", mirrored_seg->lv->name);
|
|
vg_revert(mirrored_seg->lv->vg);
|
|
return 0;
|
|
}
|
|
|
|
/* FIXME: second suspend should not be needed
|
|
* Explicitly suspend temporary LV
|
|
* This balance memlock_inc() calls with memlock_dec() in resume
|
|
* (both localy and in cluster) and also properly propagates precommited
|
|
* metadata into dm table on other nodes.
|
|
* (visible flag set causes the suspend is not properly propagated?)
|
|
*/
|
|
if (temp_layer_lv && !suspend_lv(temp_layer_lv->vg->cmd, temp_layer_lv))
|
|
log_error("Problem suspending temporary LV %s", temp_layer_lv->name);
|
|
|
|
if (!vg_commit(mirrored_seg->lv->vg)) {
|
|
if (!resume_lv(mirrored_seg->lv->vg->cmd, mirrored_seg->lv))
|
|
stack;
|
|
return_0;
|
|
}
|
|
|
|
log_very_verbose("Updating \"%s\" in kernel", mirrored_seg->lv->name);
|
|
|
|
/*
|
|
* Avoid having same mirror target loaded twice simultaneously by first
|
|
* resuming the removed LV which now contains an error segment.
|
|
* As it's now detached from mirrored_seg->lv we must resume it
|
|
* explicitly.
|
|
*/
|
|
if (temp_layer_lv && !resume_lv(temp_layer_lv->vg->cmd, temp_layer_lv)) {
|
|
log_error("Problem resuming temporary LV, %s", temp_layer_lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!resume_lv(mirrored_seg->lv->vg->cmd, mirrored_seg->lv)) {
|
|
log_error("Problem reactivating %s", mirrored_seg->lv->name);
|
|
return 0;
|
|
}
|
|
|
|
/* Save or delete the 'orphan' LVs */
|
|
if (!collapse) {
|
|
dm_list_iterate_items(lvl, &tmp_orphan_lvs)
|
|
if (!_delete_lv(lv, lvl->lv))
|
|
return_0;
|
|
}
|
|
|
|
if (temp_layer_lv && !_delete_lv(lv, temp_layer_lv))
|
|
return_0;
|
|
|
|
if (detached_log_lv && !_delete_lv(lv, detached_log_lv))
|
|
return_0;
|
|
|
|
/* Mirror with only 1 area is 'in sync'. */
|
|
if (new_area_count == 1 && is_temporary_mirror_layer(lv)) {
|
|
if (first_seg(lv)->log_lv &&
|
|
!_init_mirror_log(lv->vg->cmd, first_seg(lv)->log_lv,
|
|
1, &lv->tags, 0)) {
|
|
/* As a result, unnecessary sync may run after
|
|
* collapsing. But safe.*/
|
|
log_error("Failed to initialize log device");
|
|
return_0;
|
|
}
|
|
}
|
|
|
|
if (removed)
|
|
*removed = old_area_count - new_area_count;
|
|
|
|
log_very_verbose("%" PRIu32 " image(s) removed from %s",
|
|
old_area_count - num_removed, lv->name);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Remove the number of mirror images from the LV
|
|
*/
|
|
int remove_mirror_images(struct logical_volume *lv, uint32_t num_mirrors,
|
|
struct dm_list *removable_pvs, unsigned remove_log)
|
|
{
|
|
uint32_t num_removed, removed_once, r;
|
|
uint32_t existing_mirrors = lv_mirror_count(lv);
|
|
struct logical_volume *next_lv = lv;
|
|
|
|
num_removed = existing_mirrors - num_mirrors;
|
|
|
|
/* num_removed can be 0 if the function is called just to remove log */
|
|
do {
|
|
if (num_removed < first_seg(next_lv)->area_count)
|
|
removed_once = num_removed;
|
|
else
|
|
removed_once = first_seg(next_lv)->area_count - 1;
|
|
|
|
if (!_remove_mirror_images(next_lv, removed_once,
|
|
removable_pvs, remove_log, 0, &r))
|
|
return_0;
|
|
|
|
if (r < removed_once) {
|
|
/* Some mirrors are removed from the temporary mirror,
|
|
* but the temporary layer still exists.
|
|
* Down the stack and retry for remainder. */
|
|
next_lv = find_temporary_mirror(next_lv);
|
|
}
|
|
|
|
num_removed -= r;
|
|
} while (next_lv && num_removed);
|
|
|
|
if (num_removed) {
|
|
if (num_removed == existing_mirrors - num_mirrors)
|
|
log_error("No mirror images found using specified PVs.");
|
|
else {
|
|
log_error("%u images are removed out of requested %u.",
|
|
existing_mirrors - lv_mirror_count(lv),
|
|
existing_mirrors - num_mirrors);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Collapsing temporary mirror layers.
|
|
*
|
|
* When mirrors are added to already-mirrored LV, a temporary mirror layer
|
|
* is inserted at the top of the stack to reduce resync work.
|
|
* The function will remove the intermediate layer and collapse the stack
|
|
* as far as mirrors are in-sync.
|
|
*
|
|
* The function is destructive: to remove intermediate mirror layers,
|
|
* VG metadata commits and suspend/resume are necessary.
|
|
*/
|
|
int collapse_mirrored_lv(struct logical_volume *lv)
|
|
{
|
|
struct logical_volume *tmp_lv;
|
|
struct lv_segment *mirror_seg;
|
|
|
|
while ((tmp_lv = find_temporary_mirror(lv))) {
|
|
mirror_seg = find_mirror_seg(first_seg(tmp_lv));
|
|
if (!mirror_seg) {
|
|
log_error("Failed to find mirrored LV for %s",
|
|
tmp_lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!_mirrored_lv_in_sync(mirror_seg->lv)) {
|
|
log_verbose("Not collapsing %s: out-of-sync",
|
|
mirror_seg->lv->name);
|
|
return 1;
|
|
}
|
|
|
|
if (!_remove_mirror_images(mirror_seg->lv,
|
|
mirror_seg->area_count - 1,
|
|
NULL, 1, 1, NULL)) {
|
|
log_error("Failed to release mirror images");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int get_mirror_fault_policy(struct cmd_context *cmd __attribute((unused)),
|
|
int log_policy)
|
|
{
|
|
const char *policy;
|
|
|
|
if (log_policy)
|
|
policy = find_config_str(NULL, "activation/mirror_log_fault_policy",
|
|
DEFAULT_MIRROR_LOG_FAULT_POLICY);
|
|
else {
|
|
policy = find_config_str(NULL, "activation/mirror_image_fault_policy",
|
|
NULL);
|
|
if (!policy)
|
|
policy = find_config_str(NULL, "activation/mirror_device_fault_policy",
|
|
DEFAULT_MIRROR_IMAGE_FAULT_POLICY);
|
|
}
|
|
|
|
if (!strcmp(policy, "remove"))
|
|
return MIRROR_REMOVE;
|
|
else if (!strcmp(policy, "allocate"))
|
|
return MIRROR_ALLOCATE;
|
|
else if (!strcmp(policy, "allocate_anywhere"))
|
|
return MIRROR_ALLOCATE_ANYWHERE;
|
|
|
|
if (log_policy)
|
|
log_error("Bad activation/mirror_log_fault_policy");
|
|
else
|
|
log_error("Bad activation/mirror_device_fault_policy");
|
|
|
|
return MIRROR_REMOVE;
|
|
}
|
|
|
|
static int get_mirror_log_fault_policy(struct cmd_context *cmd)
|
|
{
|
|
return get_mirror_fault_policy(cmd, 1);
|
|
}
|
|
|
|
static int get_mirror_device_fault_policy(struct cmd_context *cmd)
|
|
{
|
|
return get_mirror_fault_policy(cmd, 0);
|
|
}
|
|
|
|
/*
|
|
* replace_mirror_images
|
|
* @mirrored_seg: segment (which may be linear now) to restore
|
|
* @num_mirrors: number of copies we should end up with
|
|
* @replace_log: replace log if not present
|
|
* @in_sync: was the original mirror in-sync?
|
|
*
|
|
* in_sync will be set to 0 if new mirror devices are being added
|
|
* In other words, it is only useful if the log (and only the log)
|
|
* is being restored.
|
|
*
|
|
* Returns: 0 on failure, 1 on reconfig, -1 if no reconfig done
|
|
*/
|
|
static int replace_mirror_images(struct lv_segment *mirrored_seg,
|
|
uint32_t num_mirrors,
|
|
int log_policy, int in_sync)
|
|
{
|
|
int r = -1;
|
|
struct logical_volume *lv = mirrored_seg->lv;
|
|
|
|
/* FIXME: Use lvconvert rather than duplicating its code */
|
|
|
|
if (mirrored_seg->area_count < num_mirrors) {
|
|
log_warn("WARNING: Failed to replace mirror device in %s/%s",
|
|
mirrored_seg->lv->vg->name, mirrored_seg->lv->name);
|
|
|
|
if ((mirrored_seg->area_count > 1) && !mirrored_seg->log_lv)
|
|
log_warn("WARNING: Use 'lvconvert -m %d %s/%s --corelog' to replace failed devices",
|
|
num_mirrors - 1, lv->vg->name, lv->name);
|
|
else
|
|
log_warn("WARNING: Use 'lvconvert -m %d %s/%s' to replace failed devices",
|
|
num_mirrors - 1, lv->vg->name, lv->name);
|
|
r = 0;
|
|
|
|
/* REMEMBER/FIXME: set in_sync to 0 if a new mirror device was added */
|
|
in_sync = 0;
|
|
}
|
|
|
|
/*
|
|
* FIXME: right now, we ignore the allocation policy specified to
|
|
* allocate the new log.
|
|
*/
|
|
if ((mirrored_seg->area_count > 1) && !mirrored_seg->log_lv &&
|
|
(log_policy != MIRROR_REMOVE)) {
|
|
log_warn("WARNING: Failed to replace mirror log device in %s/%s",
|
|
lv->vg->name, lv->name);
|
|
|
|
log_warn("WARNING: Use 'lvconvert -m %d %s/%s' to replace failed devices",
|
|
mirrored_seg->area_count - 1 , lv->vg->name, lv->name);
|
|
r = 0;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int reconfigure_mirror_images(struct lv_segment *mirrored_seg, uint32_t num_mirrors,
|
|
struct dm_list *removable_pvs, unsigned remove_log)
|
|
{
|
|
int r;
|
|
int in_sync;
|
|
int log_policy, dev_policy;
|
|
uint32_t old_num_mirrors = mirrored_seg->area_count;
|
|
int had_log = (mirrored_seg->log_lv) ? 1 : 0;
|
|
|
|
/* was the mirror in-sync before problems? */
|
|
in_sync = _mirrored_lv_in_sync(mirrored_seg->lv);
|
|
|
|
/*
|
|
* While we are only removing devices, we can have sync set.
|
|
* Setting this is only useful if we are moving to core log
|
|
* otherwise the disk log will contain the sync information
|
|
*/
|
|
init_mirror_in_sync(in_sync);
|
|
|
|
r = _remove_mirror_images(mirrored_seg->lv, old_num_mirrors - num_mirrors,
|
|
removable_pvs, remove_log, 0, NULL);
|
|
if (!r)
|
|
/* Unable to remove bad devices */
|
|
return 0;
|
|
|
|
log_warn("WARNING: Bad device removed from mirror volume, %s/%s",
|
|
mirrored_seg->lv->vg->name, mirrored_seg->lv->name);
|
|
|
|
log_policy = get_mirror_log_fault_policy(mirrored_seg->lv->vg->cmd);
|
|
dev_policy = get_mirror_device_fault_policy(mirrored_seg->lv->vg->cmd);
|
|
|
|
r = replace_mirror_images(mirrored_seg,
|
|
(dev_policy != MIRROR_REMOVE) ?
|
|
old_num_mirrors : num_mirrors,
|
|
log_policy, in_sync);
|
|
|
|
if (!r)
|
|
/* Failed to replace device(s) */
|
|
log_warn("WARNING: Unable to find substitute device for mirror volume, %s/%s",
|
|
mirrored_seg->lv->vg->name, mirrored_seg->lv->name);
|
|
else if (r > 0)
|
|
/* Success in replacing device(s) */
|
|
log_warn("WARNING: Mirror volume, %s/%s restored - substitute for failed device found.",
|
|
mirrored_seg->lv->vg->name, mirrored_seg->lv->name);
|
|
else
|
|
/* Bad device removed, but not replaced because of policy */
|
|
if (mirrored_seg->area_count == 1) {
|
|
log_warn("WARNING: Mirror volume, %s/%s converted to linear due to device failure.",
|
|
mirrored_seg->lv->vg->name, mirrored_seg->lv->name);
|
|
} else if (had_log && !mirrored_seg->log_lv) {
|
|
log_warn("WARNING: Mirror volume, %s/%s disk log removed due to device failure.",
|
|
mirrored_seg->lv->vg->name, mirrored_seg->lv->name);
|
|
}
|
|
/*
|
|
* If we made it here, we at least removed the bad device.
|
|
* Consider this success.
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
static int _create_mimage_lvs(struct alloc_handle *ah,
|
|
uint32_t num_mirrors,
|
|
uint32_t stripes,
|
|
uint32_t stripe_size,
|
|
struct logical_volume *lv,
|
|
struct logical_volume **img_lvs,
|
|
int log)
|
|
{
|
|
uint32_t m;
|
|
char *img_name;
|
|
size_t len;
|
|
|
|
len = strlen(lv->name) + 32;
|
|
if (!(img_name = alloca(len))) {
|
|
log_error("img_name allocation failed. "
|
|
"Remove new LV and retry.");
|
|
return 0;
|
|
}
|
|
|
|
if (dm_snprintf(img_name, len, "%s_mimage_%%d", lv->name) < 0) {
|
|
log_error("img_name allocation failed. "
|
|
"Remove new LV and retry.");
|
|
return 0;
|
|
}
|
|
|
|
for (m = 0; m < num_mirrors; m++) {
|
|
if (!(img_lvs[m] = lv_create_empty(img_name,
|
|
NULL, LVM_READ | LVM_WRITE,
|
|
ALLOC_INHERIT, lv->vg))) {
|
|
log_error("Aborting. Failed to create mirror image LV. "
|
|
"Remove new LV and retry.");
|
|
return 0;
|
|
}
|
|
|
|
if (log) {
|
|
if (!lv_add_log_segment(ah, m * stripes + 1, img_lvs[m], 0)) {
|
|
log_error("Aborting. Failed to add mirror image segment "
|
|
"to %s. Remove new LV and retry.",
|
|
img_lvs[m]->name);
|
|
return 0;
|
|
}
|
|
} else {
|
|
if (!lv_add_segment(ah, m * stripes, stripes, img_lvs[m],
|
|
get_segtype_from_string(lv->vg->cmd,
|
|
"striped"),
|
|
stripe_size, 0, 0)) {
|
|
log_error("Aborting. Failed to add mirror image segment "
|
|
"to %s. Remove new LV and retry.",
|
|
img_lvs[m]->name);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Remove mirrors from each segment.
|
|
* 'new_mirrors' is the number of mirrors after the removal. '0' for linear.
|
|
* If 'status_mask' is non-zero, the removal happens only when all segments
|
|
* has the status bits on.
|
|
*/
|
|
int remove_mirrors_from_segments(struct logical_volume *lv,
|
|
uint32_t new_mirrors, uint64_t status_mask)
|
|
{
|
|
struct lv_segment *seg;
|
|
uint32_t s;
|
|
|
|
/* Check the segment params are compatible */
|
|
dm_list_iterate_items(seg, &lv->segments) {
|
|
if (!seg_is_mirrored(seg)) {
|
|
log_error("Segment is not mirrored: %s:%" PRIu32,
|
|
lv->name, seg->le);
|
|
return 0;
|
|
} if ((seg->status & status_mask) != status_mask) {
|
|
log_error("Segment status does not match: %s:%" PRIu32
|
|
" status:0x%" PRIx64 "/0x%" PRIx64, lv->name, seg->le,
|
|
seg->status, status_mask);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Convert the segments */
|
|
dm_list_iterate_items(seg, &lv->segments) {
|
|
if (!new_mirrors && seg->extents_copied == seg->area_len) {
|
|
if (!move_lv_segment_area(seg, 0, seg, 1))
|
|
return_0;
|
|
}
|
|
|
|
for (s = new_mirrors + 1; s < seg->area_count; s++)
|
|
release_lv_segment_area(seg, s, seg->area_len);
|
|
|
|
seg->area_count = new_mirrors + 1;
|
|
|
|
if (!new_mirrors)
|
|
seg->segtype = get_segtype_from_string(lv->vg->cmd,
|
|
"striped");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
const char *get_pvmove_pvname_from_lv_mirr(struct logical_volume *lv_mirr)
|
|
{
|
|
struct lv_segment *seg;
|
|
|
|
dm_list_iterate_items(seg, &lv_mirr->segments) {
|
|
if (!seg_is_mirrored(seg))
|
|
continue;
|
|
if (seg_type(seg, 0) != AREA_PV)
|
|
continue;
|
|
return dev_name(seg_dev(seg, 0));
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
const char *get_pvmove_pvname_from_lv(struct logical_volume *lv)
|
|
{
|
|
struct lv_segment *seg;
|
|
uint32_t s;
|
|
|
|
dm_list_iterate_items(seg, &lv->segments) {
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg_type(seg, s) != AREA_LV)
|
|
continue;
|
|
return get_pvmove_pvname_from_lv_mirr(seg_lv(seg, s));
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct logical_volume *find_pvmove_lv(struct volume_group *vg,
|
|
struct device *dev,
|
|
uint32_t lv_type)
|
|
{
|
|
struct lv_list *lvl;
|
|
struct logical_volume *lv;
|
|
struct lv_segment *seg;
|
|
|
|
/* Loop through all LVs */
|
|
dm_list_iterate_items(lvl, &vg->lvs) {
|
|
lv = lvl->lv;
|
|
|
|
if (!(lv->status & lv_type))
|
|
continue;
|
|
|
|
/* Check segment origins point to pvname */
|
|
dm_list_iterate_items(seg, &lv->segments) {
|
|
if (seg_type(seg, 0) != AREA_PV)
|
|
continue;
|
|
if (seg_dev(seg, 0) != dev)
|
|
continue;
|
|
return lv;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct logical_volume *find_pvmove_lv_from_pvname(struct cmd_context *cmd,
|
|
struct volume_group *vg,
|
|
const char *name,
|
|
const char *uuid __attribute((unused)),
|
|
uint32_t lv_type)
|
|
{
|
|
struct physical_volume *pv;
|
|
|
|
if (!(pv = find_pv_by_name(cmd, name)))
|
|
return_NULL;
|
|
|
|
return find_pvmove_lv(vg, pv->dev, lv_type);
|
|
}
|
|
|
|
struct dm_list *lvs_using_lv(struct cmd_context *cmd, struct volume_group *vg,
|
|
struct logical_volume *lv)
|
|
{
|
|
struct dm_list *lvs;
|
|
struct logical_volume *lv1;
|
|
struct lv_list *lvl, *lvl1;
|
|
struct lv_segment *seg;
|
|
uint32_t s;
|
|
|
|
if (!(lvs = dm_pool_alloc(cmd->mem, sizeof(*lvs)))) {
|
|
log_error("lvs list alloc failed");
|
|
return NULL;
|
|
}
|
|
|
|
dm_list_init(lvs);
|
|
|
|
/* Loop through all LVs except the one supplied */
|
|
dm_list_iterate_items(lvl1, &vg->lvs) {
|
|
lv1 = lvl1->lv;
|
|
if (lv1 == lv)
|
|
continue;
|
|
|
|
/* Find whether any segment points at the supplied LV */
|
|
dm_list_iterate_items(seg, &lv1->segments) {
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg_type(seg, s) != AREA_LV ||
|
|
seg_lv(seg, s) != lv)
|
|
continue;
|
|
if (!(lvl = dm_pool_alloc(cmd->mem, sizeof(*lvl)))) {
|
|
log_error("lv_list alloc failed");
|
|
return NULL;
|
|
}
|
|
lvl->lv = lv1;
|
|
dm_list_add(lvs, &lvl->list);
|
|
goto next_lv;
|
|
}
|
|
}
|
|
next_lv:
|
|
;
|
|
}
|
|
|
|
return lvs;
|
|
}
|
|
|
|
float copy_percent(struct logical_volume *lv_mirr,
|
|
percent_range_t *percent_range)
|
|
{
|
|
uint32_t numerator = 0u, denominator = 0u;
|
|
struct lv_segment *seg;
|
|
|
|
dm_list_iterate_items(seg, &lv_mirr->segments) {
|
|
denominator += seg->area_len;
|
|
|
|
if (seg_is_mirrored(seg) && seg->area_count > 1)
|
|
numerator += seg->extents_copied;
|
|
else
|
|
numerator += seg->area_len;
|
|
}
|
|
|
|
if (!denominator || (numerator == denominator))
|
|
*percent_range = PERCENT_100;
|
|
else if (numerator == 0)
|
|
*percent_range = PERCENT_0;
|
|
else
|
|
*percent_range = PERCENT_0_TO_100;
|
|
|
|
return denominator ? (float) numerator *100 / denominator : 100.0;
|
|
}
|
|
|
|
/*
|
|
* Fixup mirror pointers after single-pass segment import
|
|
*/
|
|
int fixup_imported_mirrors(struct volume_group *vg)
|
|
{
|
|
struct lv_list *lvl;
|
|
struct lv_segment *seg;
|
|
|
|
dm_list_iterate_items(lvl, &vg->lvs) {
|
|
dm_list_iterate_items(seg, &lvl->lv->segments) {
|
|
if (seg->segtype !=
|
|
get_segtype_from_string(vg->cmd, "mirror"))
|
|
continue;
|
|
|
|
if (seg->log_lv && !add_seg_to_segs_using_this_lv(seg->log_lv, seg))
|
|
return_0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Add mirrors to "linear" or "mirror" segments
|
|
*/
|
|
int add_mirrors_to_segments(struct cmd_context *cmd, struct logical_volume *lv,
|
|
uint32_t mirrors, uint32_t region_size,
|
|
struct dm_list *allocatable_pvs, alloc_policy_t alloc)
|
|
{
|
|
struct alloc_handle *ah;
|
|
const struct segment_type *segtype;
|
|
struct dm_list *parallel_areas;
|
|
uint32_t adjusted_region_size;
|
|
int r = 1;
|
|
|
|
if (!(parallel_areas = build_parallel_areas_from_lv(cmd, lv, 1)))
|
|
return_0;
|
|
|
|
if (!(segtype = get_segtype_from_string(cmd, "mirror")))
|
|
return_0;
|
|
|
|
adjusted_region_size = adjusted_mirror_region_size(lv->vg->extent_size,
|
|
lv->le_count,
|
|
region_size);
|
|
|
|
if (!(ah = allocate_extents(lv->vg, NULL, segtype, 1, mirrors, 0, 0,
|
|
lv->le_count, allocatable_pvs, alloc,
|
|
parallel_areas))) {
|
|
log_error("Unable to allocate mirror extents for %s.", lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!lv_add_mirror_areas(ah, lv, 0, adjusted_region_size)) {
|
|
log_error("Failed to add mirror areas to %s", lv->name);
|
|
r = 0;
|
|
}
|
|
|
|
alloc_destroy(ah);
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Convert mirror log
|
|
*
|
|
* FIXME: Can't handle segment-by-segment mirror (like pvmove)
|
|
*/
|
|
int remove_mirror_log(struct cmd_context *cmd,
|
|
struct logical_volume *lv,
|
|
struct dm_list *removable_pvs)
|
|
{
|
|
float sync_percent;
|
|
percent_range_t percent_range = PERCENT_0;
|
|
struct lvinfo info;
|
|
struct volume_group *vg = lv->vg;
|
|
|
|
/* Unimplemented features */
|
|
if (dm_list_size(&lv->segments) != 1) {
|
|
log_error("Multiple-segment mirror is not supported");
|
|
return 0;
|
|
}
|
|
|
|
/* Had disk log, switch to core. */
|
|
if (lv_info(cmd, lv, &info, 0, 0) && info.exists) {
|
|
if (!lv_mirror_percent(cmd, lv, 0, &sync_percent,
|
|
&percent_range, NULL)) {
|
|
log_error("Unable to determine mirror sync status.");
|
|
return 0;
|
|
}
|
|
} else if (vg_is_clustered(vg)) {
|
|
log_error("Unable to convert the log of an inactive "
|
|
"cluster mirror, %s", lv->name);
|
|
return 0;
|
|
} else if (yes_no_prompt("Full resync required to convert "
|
|
"inactive mirror %s to core log. "
|
|
"Proceed? [y/n]: ") == 'y')
|
|
sync_percent = 0;
|
|
else
|
|
return 0;
|
|
|
|
if (percent_range == PERCENT_100)
|
|
init_mirror_in_sync(1);
|
|
else {
|
|
/* A full resync will take place */
|
|
lv->status &= ~MIRROR_NOTSYNCED;
|
|
init_mirror_in_sync(0);
|
|
}
|
|
|
|
if (!remove_mirror_images(lv, lv_mirror_count(lv),
|
|
removable_pvs, 1U))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct logical_volume *_create_mirror_log(struct logical_volume *lv,
|
|
struct alloc_handle *ah,
|
|
alloc_policy_t alloc,
|
|
const char *lv_name,
|
|
const char *suffix)
|
|
{
|
|
struct logical_volume *log_lv;
|
|
char *log_name;
|
|
size_t len;
|
|
|
|
len = strlen(lv_name) + 32;
|
|
if (!(log_name = alloca(len))) {
|
|
log_error("log_name allocation failed.");
|
|
return NULL;
|
|
}
|
|
|
|
if (dm_snprintf(log_name, len, "%s%s", lv_name, suffix) < 0) {
|
|
log_error("log_name allocation failed.");
|
|
return NULL;
|
|
}
|
|
|
|
if (!(log_lv = lv_create_empty(log_name, NULL,
|
|
VISIBLE_LV | LVM_READ | LVM_WRITE,
|
|
alloc, lv->vg)))
|
|
return_NULL;
|
|
|
|
if (!lv_add_log_segment(ah, 0, log_lv, MIRROR_LOG))
|
|
return_NULL;
|
|
|
|
return log_lv;
|
|
}
|
|
|
|
/*
|
|
* Returns: 1 on success, 0 on error
|
|
*/
|
|
static int _form_mirror(struct cmd_context *cmd, struct alloc_handle *ah,
|
|
struct logical_volume *lv,
|
|
uint32_t mirrors, uint32_t stripes,
|
|
uint32_t stripe_size, uint32_t region_size, int log)
|
|
{
|
|
struct logical_volume **img_lvs;
|
|
|
|
/*
|
|
* insert a mirror layer
|
|
*/
|
|
if (dm_list_size(&lv->segments) != 1 ||
|
|
seg_type(first_seg(lv), 0) != AREA_LV)
|
|
if (!insert_layer_for_lv(cmd, lv, 0, "_mimage_%d"))
|
|
return 0;
|
|
|
|
/*
|
|
* create mirror image LVs
|
|
*/
|
|
if (!(img_lvs = alloca(sizeof(*img_lvs) * mirrors))) {
|
|
log_error("img_lvs allocation failed. "
|
|
"Remove new LV and retry.");
|
|
return 0;
|
|
}
|
|
|
|
if (!_create_mimage_lvs(ah, mirrors, stripes, stripe_size, lv, img_lvs, log))
|
|
return 0;
|
|
|
|
if (!lv_add_mirror_lvs(lv, img_lvs, mirrors,
|
|
MIRROR_IMAGE | (lv->status & LOCKED),
|
|
region_size)) {
|
|
log_error("Aborting. Failed to add mirror segment. "
|
|
"Remove new LV and retry.");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct logical_volume *_set_up_mirror_log(struct cmd_context *cmd,
|
|
struct alloc_handle *ah,
|
|
struct logical_volume *lv,
|
|
uint32_t log_count,
|
|
uint32_t region_size,
|
|
alloc_policy_t alloc,
|
|
int in_sync)
|
|
{
|
|
struct logical_volume *log_lv;
|
|
const char *suffix, *c;
|
|
char *lv_name;
|
|
size_t len;
|
|
struct lv_segment *seg;
|
|
|
|
init_mirror_in_sync(in_sync);
|
|
|
|
/* Mirror log name is lv_name + suffix, determined as the following:
|
|
* 1. suffix is:
|
|
* o "_mlog" for the original mirror LV.
|
|
* o "_mlogtmp_%d" for temporary mirror LV,
|
|
* 2. lv_name is:
|
|
* o lv->name, if the log is temporary
|
|
* o otherwise, the top-level LV name
|
|
*/
|
|
seg = first_seg(lv);
|
|
if (seg_type(seg, 0) == AREA_LV &&
|
|
strstr(seg_lv(seg, 0)->name, MIRROR_SYNC_LAYER)) {
|
|
lv_name = lv->name;
|
|
suffix = "_mlogtmp_%d";
|
|
} else if ((c = strstr(lv->name, MIRROR_SYNC_LAYER))) {
|
|
len = c - lv->name + 1;
|
|
if (!(lv_name = alloca(len)) ||
|
|
!dm_snprintf(lv_name, len, "%s", lv->name)) {
|
|
log_error("mirror log name allocation failed");
|
|
return 0;
|
|
}
|
|
suffix = "_mlog";
|
|
} else {
|
|
lv_name = lv->name;
|
|
suffix = "_mlog";
|
|
}
|
|
|
|
if (!(log_lv = _create_mirror_log(lv, ah, alloc,
|
|
(const char *) lv_name, suffix))) {
|
|
log_error("Failed to create mirror log.");
|
|
return NULL;
|
|
}
|
|
|
|
if ((log_count > 1) &&
|
|
!_form_mirror(cmd, ah, log_lv, log_count-1, 1, 0, region_size, 1)) {
|
|
log_error("Failed to form mirrored log.");
|
|
return NULL;
|
|
}
|
|
|
|
if (!_init_mirror_log(cmd, log_lv, in_sync, &lv->tags, 1)) {
|
|
log_error("Failed to initialise mirror log.");
|
|
return NULL;
|
|
}
|
|
|
|
return log_lv;
|
|
}
|
|
|
|
int attach_mirror_log(struct lv_segment *seg, struct logical_volume *log_lv)
|
|
{
|
|
seg->log_lv = log_lv;
|
|
log_lv->status |= MIRROR_LOG;
|
|
lv_set_hidden(log_lv);
|
|
return add_seg_to_segs_using_this_lv(log_lv, seg);
|
|
}
|
|
|
|
int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
|
|
uint32_t log_count, uint32_t region_size,
|
|
struct dm_list *allocatable_pvs, alloc_policy_t alloc)
|
|
{
|
|
struct alloc_handle *ah;
|
|
const struct segment_type *segtype;
|
|
struct dm_list *parallel_areas;
|
|
float sync_percent;
|
|
percent_range_t percent_range;
|
|
int in_sync;
|
|
struct logical_volume *log_lv;
|
|
struct lvinfo info;
|
|
int r = 0;
|
|
|
|
if (dm_list_size(&lv->segments) != 1) {
|
|
log_error("Multiple-segment mirror is not supported");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We are unable to convert the log of inactive cluster mirrors
|
|
* due to the inability to detect whether the mirror is active
|
|
* on remote nodes (even though it is inactive on this node)
|
|
*/
|
|
if (vg_is_clustered(lv->vg) &&
|
|
!(lv_info(cmd, lv, &info, 0, 0) && info.exists)) {
|
|
log_error("Unable to convert the log of inactive "
|
|
"cluster mirror %s", lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!(parallel_areas = build_parallel_areas_from_lv(cmd, lv, 0)))
|
|
return_0;
|
|
|
|
if (!(segtype = get_segtype_from_string(cmd, "mirror")))
|
|
return_0;
|
|
|
|
if (activation() && segtype->ops->target_present &&
|
|
!segtype->ops->target_present(cmd, NULL, NULL)) {
|
|
log_error("%s: Required device-mapper target(s) not "
|
|
"detected in your kernel", segtype->name);
|
|
return 0;
|
|
}
|
|
|
|
/* allocate destination extents */
|
|
ah = allocate_extents(lv->vg, NULL, segtype,
|
|
0, 0, log_count, region_size, 0,
|
|
allocatable_pvs, alloc, parallel_areas);
|
|
if (!ah) {
|
|
log_error("Unable to allocate extents for mirror log.");
|
|
return 0;
|
|
}
|
|
|
|
/* check sync status */
|
|
if (lv_mirror_percent(cmd, lv, 0, &sync_percent, &percent_range,
|
|
NULL) &&
|
|
(percent_range == PERCENT_100))
|
|
in_sync = 1;
|
|
else
|
|
in_sync = 0;
|
|
|
|
if (!(log_lv = _set_up_mirror_log(cmd, ah, lv, log_count,
|
|
region_size, alloc, in_sync)))
|
|
goto_out;
|
|
|
|
if (!attach_mirror_log(first_seg(lv), log_lv))
|
|
goto_out;
|
|
|
|
r = 1;
|
|
out:
|
|
alloc_destroy(ah);
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Convert "linear" LV to "mirror".
|
|
*/
|
|
int add_mirror_images(struct cmd_context *cmd, struct logical_volume *lv,
|
|
uint32_t mirrors, uint32_t stripes,
|
|
uint32_t stripe_size, uint32_t region_size,
|
|
struct dm_list *allocatable_pvs, alloc_policy_t alloc,
|
|
uint32_t log_count)
|
|
{
|
|
struct alloc_handle *ah;
|
|
const struct segment_type *segtype;
|
|
struct dm_list *parallel_areas;
|
|
struct logical_volume *log_lv = NULL;
|
|
|
|
/*
|
|
* allocate destination extents
|
|
*/
|
|
|
|
if (!(parallel_areas = build_parallel_areas_from_lv(cmd, lv, 0)))
|
|
return_0;
|
|
|
|
if (!(segtype = get_segtype_from_string(cmd, "mirror")))
|
|
return_0;
|
|
|
|
ah = allocate_extents(lv->vg, NULL, segtype,
|
|
stripes, mirrors, log_count, region_size, lv->le_count,
|
|
allocatable_pvs, alloc, parallel_areas);
|
|
if (!ah) {
|
|
log_error("Unable to allocate extents for mirror(s).");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* create and initialize mirror log
|
|
*/
|
|
if (log_count &&
|
|
!(log_lv = _set_up_mirror_log(cmd, ah, lv, log_count, region_size,
|
|
alloc, mirror_in_sync()))) {
|
|
stack;
|
|
goto out_remove_images;
|
|
}
|
|
|
|
/* The log initialization involves vg metadata commit.
|
|
So from here on, if failure occurs, the log must be explicitly
|
|
removed and the updated vg metadata should be committed. */
|
|
|
|
if (!_form_mirror(cmd, ah, lv, mirrors, stripes, stripe_size, region_size, 0))
|
|
goto out_remove_log;
|
|
|
|
if (log_count && !attach_mirror_log(first_seg(lv), log_lv))
|
|
stack;
|
|
|
|
alloc_destroy(ah);
|
|
return 1;
|
|
|
|
out_remove_log:
|
|
if (log_lv) {
|
|
if (!lv_remove(log_lv) ||
|
|
!vg_write(log_lv->vg) ||
|
|
!vg_commit(log_lv->vg))
|
|
log_error("Manual intervention may be required to remove "
|
|
"abandoned log LV before retrying.");
|
|
else
|
|
backup(log_lv->vg);
|
|
}
|
|
out_remove_images:
|
|
alloc_destroy(ah);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Generic interface for adding mirror and/or mirror log.
|
|
* 'mirror' is the number of mirrors to be added.
|
|
* 'pvs' is either allocatable pvs.
|
|
*/
|
|
int lv_add_mirrors(struct cmd_context *cmd, struct logical_volume *lv,
|
|
uint32_t mirrors, uint32_t stripes, uint32_t stripe_size,
|
|
uint32_t region_size, uint32_t log_count,
|
|
struct dm_list *pvs, alloc_policy_t alloc, uint32_t flags)
|
|
{
|
|
if (!mirrors && !log_count) {
|
|
log_error("No conversion is requested");
|
|
return 0;
|
|
}
|
|
|
|
/* For corelog mirror, activation code depends on
|
|
* the global mirror_in_sync status. As we are adding
|
|
* a new mirror, it should be set as 'out-of-sync'
|
|
* so that the sync starts. */
|
|
/* However, MIRROR_SKIP_INIT_SYNC even overrides it. */
|
|
if (flags & MIRROR_SKIP_INIT_SYNC)
|
|
init_mirror_in_sync(1);
|
|
else if (!log_count)
|
|
init_mirror_in_sync(0);
|
|
|
|
if (flags & MIRROR_BY_SEG) {
|
|
if (log_count) {
|
|
log_error("Persistent log is not supported on "
|
|
"segment-by-segment mirroring");
|
|
return 0;
|
|
}
|
|
if (stripes > 1) {
|
|
log_error("Striped-mirroring is not supported on "
|
|
"segment-by-segment mirroring");
|
|
return 0;
|
|
}
|
|
|
|
return add_mirrors_to_segments(cmd, lv, mirrors,
|
|
region_size, pvs, alloc);
|
|
} else if (flags & MIRROR_BY_LV) {
|
|
if (!mirrors)
|
|
return add_mirror_log(cmd, lv, log_count,
|
|
region_size, pvs, alloc);
|
|
return add_mirror_images(cmd, lv, mirrors,
|
|
stripes, stripe_size, region_size,
|
|
pvs, alloc, log_count);
|
|
}
|
|
|
|
log_error("Unsupported mirror conversion type");
|
|
return 0;
|
|
}
|
|
|
|
int lv_split_mirror_images(struct logical_volume *lv, const char *split_name,
|
|
uint32_t split_count, struct dm_list *removable_pvs)
|
|
{
|
|
int r;
|
|
|
|
/* Can't split a mirror that is not in-sync... unless force? */
|
|
if (!_mirrored_lv_in_sync(lv)) {
|
|
log_error("Unable to split mirror that is not in-sync.");
|
|
return_0;
|
|
}
|
|
|
|
/*
|
|
* FIXME: Generate default name when not supplied.
|
|
*
|
|
* If we were going to generate a default name, we would
|
|
* do it here. Better to wait for a decision on the form
|
|
* of the default name when '--track_deltas' (the ability
|
|
* to merge a split leg back in and only copy the changes)
|
|
* is being implemented. For now, we force the user to
|
|
* come up with a name for their LV.
|
|
*/
|
|
r = _split_mirror_images(lv, split_name, split_count, removable_pvs);
|
|
if (!r)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Generic interface for removing mirror and/or mirror log.
|
|
* 'mirror' is the number of mirrors to be removed.
|
|
* 'pvs' is removable pvs.
|
|
*/
|
|
int lv_remove_mirrors(struct cmd_context *cmd __attribute((unused)),
|
|
struct logical_volume *lv,
|
|
uint32_t mirrors, uint32_t log_count, struct dm_list *pvs,
|
|
uint64_t status_mask)
|
|
{
|
|
uint32_t new_mirrors;
|
|
struct lv_segment *seg;
|
|
|
|
if (!mirrors && !log_count) {
|
|
log_error("No conversion is requested");
|
|
return 0;
|
|
}
|
|
|
|
seg = first_seg(lv);
|
|
if (!seg_is_mirrored(seg)) {
|
|
log_error("Not a mirror segment");
|
|
return 0;
|
|
}
|
|
|
|
if (lv_mirror_count(lv) <= mirrors) {
|
|
log_error("Removing more than existing: %d <= %d",
|
|
seg->area_count, mirrors);
|
|
return 0;
|
|
}
|
|
new_mirrors = lv_mirror_count(lv) - mirrors - 1;
|
|
|
|
/* MIRROR_BY_LV */
|
|
if (seg_type(seg, 0) == AREA_LV &&
|
|
seg_lv(seg, 0)->status & MIRROR_IMAGE)
|
|
return remove_mirror_images(lv, new_mirrors + 1,
|
|
pvs, log_count ? 1U : 0);
|
|
|
|
/* MIRROR_BY_SEG */
|
|
if (log_count) {
|
|
log_error("Persistent log is not supported on "
|
|
"segment-by-segment mirroring");
|
|
return 0;
|
|
}
|
|
return remove_mirrors_from_segments(lv, new_mirrors, status_mask);
|
|
}
|
|
|