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git://sourceware.org/git/lvm2.git
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896410b393
Add missing '_' for some static vars.
834 lines
25 KiB
C
834 lines
25 KiB
C
/*
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* Copyright (C) 2011-2013 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "base/memory/zalloc.h"
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#include "lib/misc/lib.h"
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#include "lib/display/display.h"
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#include "lib/metadata/metadata.h"
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#include "lib/metadata/segtype.h"
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#include "lib/format_text/text_export.h"
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#include "lib/config/config.h"
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#include "lib/activate/activate.h"
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#include "lib/datastruct/str_list.h"
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/* Dm kernel module name for thin provisiong */
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static const char _thin_pool_module[] = "thin-pool";
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static const char _thin_module[] = "thin";
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/*
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* Macro used as return argument - returns 0.
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* return is left to be written in the function for better readability.
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*/
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#define SEG_LOG_ERROR(t, p...) \
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log_error(t " segment %s of logical volume %s.", ## p, \
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dm_config_parent_name(sn), seg->lv->name), 0;
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/* TODO: using static field here, maybe should be a part of segment_type */
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static unsigned _feature_mask;
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static void _thin_pool_display(const struct lv_segment *seg)
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{
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log_print(" Chunk size\t\t%s",
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display_size(seg->lv->vg->cmd, seg->chunk_size));
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log_print(" Discards\t\t%s", get_pool_discards_name(seg->discards));
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log_print(" Thin count\t\t%u",
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dm_list_size(&seg->lv->segs_using_this_lv));
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log_print(" Transaction ID\t%" PRIu64, seg->transaction_id);
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log_print(" Zero new blocks\t%s",
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(seg->zero_new_blocks == THIN_ZERO_YES) ? "yes" : "no");
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log_print(" ");
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}
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static int _thin_pool_add_message(struct lv_segment *seg,
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const char *key,
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const struct dm_config_node *sn)
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{
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const char *lv_name = NULL;
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struct logical_volume *lv = NULL;
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uint32_t delete_id = 0;
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dm_thin_message_t type;
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/* Message must have only one from: create, delete */
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if (dm_config_get_str(sn, "create", &lv_name)) {
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if (!(lv = find_lv(seg->lv->vg, lv_name)))
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return SEG_LOG_ERROR("Unknown LV %s for create message in",
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lv_name);
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/* FIXME: switch to _SNAP later, if the created LV has an origin */
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type = DM_THIN_MESSAGE_CREATE_THIN;
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} else if (dm_config_get_uint32(sn, "delete", &delete_id))
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type = DM_THIN_MESSAGE_DELETE;
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else
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return SEG_LOG_ERROR("Unknown message in");
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if (!attach_thin_pool_message(seg, type, lv, delete_id, 1))
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return_0;
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return 1;
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}
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static int _thin_pool_text_import(struct lv_segment *seg,
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const struct dm_config_node *sn,
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struct dm_hash_table *pv_hash __attribute__((unused)))
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{
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const char *lv_name;
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struct logical_volume *pool_data_lv, *pool_metadata_lv;
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const char *discards_str = NULL;
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uint32_t zero = 0;
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uint32_t crop = 0;
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if (!dm_config_get_str(sn, "metadata", &lv_name))
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return SEG_LOG_ERROR("Metadata must be a string in");
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if (!(pool_metadata_lv = find_lv(seg->lv->vg, lv_name)))
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return SEG_LOG_ERROR("Unknown metadata %s in", lv_name);
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if (!dm_config_get_str(sn, "pool", &lv_name))
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return SEG_LOG_ERROR("Pool must be a string in");
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if (!(pool_data_lv = find_lv(seg->lv->vg, lv_name)))
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return SEG_LOG_ERROR("Unknown pool %s in", lv_name);
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if (!attach_pool_data_lv(seg, pool_data_lv))
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return_0;
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if (!attach_pool_metadata_lv(seg, pool_metadata_lv))
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return_0;
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if (!dm_config_get_uint64(sn, "transaction_id", &seg->transaction_id))
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return SEG_LOG_ERROR("Could not read transaction_id for");
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if (!dm_config_get_uint32(sn, "chunk_size", &seg->chunk_size))
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return SEG_LOG_ERROR("Could not read chunk_size");
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if (dm_config_has_node(sn, "discards") &&
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!dm_config_get_str(sn, "discards", &discards_str))
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return SEG_LOG_ERROR("Could not read discards for");
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if (!discards_str)
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seg->discards = THIN_DISCARDS_IGNORE;
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else if (!set_pool_discards(&seg->discards, discards_str))
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return SEG_LOG_ERROR("Discards option unsupported for");
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if ((seg->chunk_size < DM_THIN_MIN_DATA_BLOCK_SIZE) ||
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(seg->chunk_size > DM_THIN_MAX_DATA_BLOCK_SIZE))
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return SEG_LOG_ERROR("Unsupported value %u for chunk_size",
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seg->device_id);
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if (dm_config_has_node(sn, "zero_new_blocks") &&
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!dm_config_get_uint32(sn, "zero_new_blocks", &zero))
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return SEG_LOG_ERROR("Could not read zero_new_blocks for");
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seg->zero_new_blocks = (zero) ? THIN_ZERO_YES : THIN_ZERO_NO;
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if (dm_config_has_node(sn, "crop_metadata")) {
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if (!dm_config_get_uint32(sn, "crop_metadata", &crop))
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return SEG_LOG_ERROR("Could not read crop_metadata for");
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seg->crop_metadata = (crop) ? THIN_CROP_METADATA_YES : THIN_CROP_METADATA_NO;
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seg->lv->status |= LV_CROP_METADATA;
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}
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/* Read messages */
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for (; sn; sn = sn->sib)
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if (!(sn->v) && !_thin_pool_add_message(seg, sn->key, sn->child))
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return_0;
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return 1;
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}
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static int _thin_pool_text_import_area_count(const struct dm_config_node *sn,
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uint32_t *area_count)
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{
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*area_count = 1;
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return 1;
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}
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static int _thin_pool_text_export(const struct lv_segment *seg, struct formatter *f)
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{
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unsigned cnt = 0;
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const struct lv_thin_message *tmsg;
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outf(f, "metadata = \"%s\"", seg->metadata_lv->name);
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outf(f, "pool = \"%s\"", seg_lv(seg, 0)->name);
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outf(f, "transaction_id = %" PRIu64, seg->transaction_id);
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outsize(f, (uint64_t) seg->chunk_size,
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"chunk_size = %u", seg->chunk_size);
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switch (seg->discards) {
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case THIN_DISCARDS_PASSDOWN:
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case THIN_DISCARDS_NO_PASSDOWN:
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case THIN_DISCARDS_IGNORE:
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outf(f, "discards = \"%s\"", get_pool_discards_name(seg->discards));
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break;
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default:
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log_error(INTERNAL_ERROR "Invalid discards value %d.", seg->discards);
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return 0;
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}
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if (seg->zero_new_blocks == THIN_ZERO_YES)
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outf(f, "zero_new_blocks = 1");
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else if (seg->zero_new_blocks != THIN_ZERO_NO) {
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log_error(INTERNAL_ERROR "Invalid zero new blocks value %d.",
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seg->zero_new_blocks);
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return 0;
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}
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if (seg->crop_metadata != THIN_CROP_METADATA_UNSELECTED)
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outf(f, "crop_metadata = %u", (seg->crop_metadata == THIN_CROP_METADATA_YES) ? 1 : 0);
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dm_list_iterate_items(tmsg, &seg->thin_messages) {
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/* Extra validation */
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switch (tmsg->type) {
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case DM_THIN_MESSAGE_CREATE_SNAP:
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case DM_THIN_MESSAGE_CREATE_THIN:
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if (!lv_is_thin_volume(tmsg->u.lv)) {
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log_error(INTERNAL_ERROR
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"LV %s is not a thin volume.",
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tmsg->u.lv->name);
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return 0;
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}
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break;
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default:
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break;
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}
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if (!cnt)
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outnl(f);
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outf(f, "message%d {", ++cnt);
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out_inc_indent(f);
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switch (tmsg->type) {
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case DM_THIN_MESSAGE_CREATE_SNAP:
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case DM_THIN_MESSAGE_CREATE_THIN:
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outf(f, "create = \"%s\"", tmsg->u.lv->name);
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break;
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case DM_THIN_MESSAGE_DELETE:
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outf(f, "delete = %d", tmsg->u.delete_id);
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break;
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default:
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log_error(INTERNAL_ERROR "Passed unsupported message.");
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return 0;
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}
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out_dec_indent(f);
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outf(f, "}");
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}
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return 1;
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}
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#ifdef DEVMAPPER_SUPPORT
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static int _thin_target_present(struct cmd_context *cmd,
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const struct lv_segment *seg __attribute__((unused)),
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unsigned *attributes);
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static int _thin_pool_modules_needed(struct dm_pool *mem,
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const struct lv_segment *seg __attribute__((unused)),
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struct dm_list *modules)
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{
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if (!str_list_add(mem, modules, _thin_pool_module)) {
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log_error("String list allocation failed for thin_pool.");
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return 0;
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}
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return 1;
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}
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static int _thin_modules_needed(struct dm_pool *mem,
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const struct lv_segment *seg,
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struct dm_list *modules)
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{
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if (!_thin_pool_modules_needed(mem, seg, modules))
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return_0;
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if (!str_list_add(mem, modules, _thin_module)) {
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log_error("String list allocation failed for thin.");
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return 0;
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}
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return 1;
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}
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static int _thin_pool_add_target_line(struct dev_manager *dm,
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struct dm_pool *mem,
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struct cmd_context *cmd,
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void **target_state __attribute__((unused)),
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struct lv_segment *seg,
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const struct lv_activate_opts *laopts,
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struct dm_tree_node *node, uint64_t len,
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uint32_t *pvmove_mirror_count __attribute__((unused)))
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{
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static int _no_discards = 0;
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static int _no_error_if_no_space = 0;
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char *metadata_dlid, *pool_dlid;
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const struct lv_thin_message *lmsg;
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const struct logical_volume *origin;
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unsigned attr;
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uint64_t low_water_mark;
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int threshold;
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if (!_thin_target_present(cmd, NULL, &attr))
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return_0;
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if (!seg->metadata_lv) {
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log_error(INTERNAL_ERROR "Thin pool is missing metadata device.");
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return 0;
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}
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if (!(attr & THIN_FEATURE_BLOCK_SIZE) &&
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!is_power_of_2(seg->chunk_size)) {
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log_error("Thin pool target does not support %s chunk size (needs"
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" kernel >= 3.6).", display_size(cmd, seg->chunk_size));
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return 0;
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}
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if (!(metadata_dlid = build_dm_uuid(mem, seg->metadata_lv, NULL))) {
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log_error("Failed to build uuid for metadata LV %s.",
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display_lvname(seg->metadata_lv));
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return 0;
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}
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if (!(pool_dlid = build_dm_uuid(mem, seg_lv(seg, 0), NULL))) {
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log_error("Failed to build uuid for pool LV %s.",
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display_lvname(seg_lv(seg, 0)));
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return 0;
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}
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threshold = find_config_tree_int(seg->lv->vg->cmd,
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activation_thin_pool_autoextend_threshold_CFG,
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lv_config_profile(seg->lv));
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if (threshold < 50)
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threshold = 50;
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if (threshold < 100)
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/* Translate to number of free pool blocks to trigger watermark */
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low_water_mark = len / seg->chunk_size * (100 - threshold) / 100;
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else
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low_water_mark = 0;
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if (!dm_tree_node_add_thin_pool_target_v1(node, len,
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seg->transaction_id,
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metadata_dlid, pool_dlid,
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seg->chunk_size, low_water_mark,
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(seg->zero_new_blocks == THIN_ZERO_YES) ? 0 : 1,
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(seg->crop_metadata == THIN_CROP_METADATA_YES) ? 1 : 0))
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return_0;
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if (attr & THIN_FEATURE_DISCARDS) {
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/* Use ignore for discards ignore or non-power-of-2 chunk_size and <1.5 target */
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/* FIXME: Check whether underlying dev supports discards */
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if (((!(attr & THIN_FEATURE_DISCARDS_NON_POWER_2) &&
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!is_power_of_2(seg->chunk_size)) ||
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(seg->discards == THIN_DISCARDS_IGNORE))) {
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if (!dm_tree_node_set_thin_pool_discard(node, 1, 0))
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return_0;
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} else if (!dm_tree_node_set_thin_pool_discard(node, 0,
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(seg->discards == THIN_DISCARDS_NO_PASSDOWN)))
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return_0;
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} else if (seg->discards != THIN_DISCARDS_IGNORE)
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log_warn_suppress(_no_discards++, "WARNING: Thin pool target does "
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"not support discards (needs kernel >= 3.4).");
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if (attr & THIN_FEATURE_ERROR_IF_NO_SPACE)
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dm_tree_node_set_thin_pool_error_if_no_space(node, lv_is_error_when_full(seg->lv));
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else if (lv_is_error_when_full(seg->lv))
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log_warn_suppress(_no_error_if_no_space++, "WARNING: Thin pool target does "
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"not support error if no space (needs version >= 1.10).");
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/*
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* Add messages only for activation tree.
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* Otherwise avoid checking for existence of suspended origin.
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* Also transation_id is checked only when snapshot origin is active.
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* (This might change later)
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*/
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if (!laopts->send_messages)
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return 1;
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dm_list_iterate_items(lmsg, &seg->thin_messages) {
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switch (lmsg->type) {
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case DM_THIN_MESSAGE_CREATE_THIN:
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origin = first_seg(lmsg->u.lv)->origin;
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/* Check if the origin is suspended */
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log_debug_activation("Thin pool create_%s %s.", (!origin) ? "thin" : "snap", lmsg->u.lv->name);
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if (!dm_tree_node_add_thin_pool_message(node,
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(!origin) ? lmsg->type : DM_THIN_MESSAGE_CREATE_SNAP,
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first_seg(lmsg->u.lv)->device_id,
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(!origin) ? 0 : first_seg(origin)->device_id))
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return_0;
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break;
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case DM_THIN_MESSAGE_DELETE:
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log_debug_activation("Thin pool delete %u.", lmsg->u.delete_id);
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if (!dm_tree_node_add_thin_pool_message(node,
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lmsg->type,
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lmsg->u.delete_id, 0))
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return_0;
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break;
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default:
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log_error(INTERNAL_ERROR "Unsupported message.");
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return 0;
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}
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}
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if (!dm_list_empty(&seg->thin_messages)) {
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/* Messages were passed, modify transaction_id as the last one */
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log_debug_activation("Thin pool set transaction id %" PRIu64 ".", seg->transaction_id);
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if (!dm_tree_node_add_thin_pool_message(node,
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DM_THIN_MESSAGE_SET_TRANSACTION_ID,
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seg->transaction_id - 1,
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seg->transaction_id))
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return_0;
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}
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return 1;
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}
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static int _thin_pool_target_percent(void **target_state __attribute__((unused)),
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dm_percent_t *percent,
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struct dm_pool *mem,
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struct cmd_context *cmd __attribute__((unused)),
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struct lv_segment *seg,
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char *params,
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uint64_t *total_numerator,
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uint64_t *total_denominator)
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{
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struct dm_status_thin_pool *s;
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if (!dm_get_status_thin_pool(mem, params, &s))
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return_0;
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if (s->fail || s->error)
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*percent = DM_PERCENT_INVALID;
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/* With 'seg' report metadata percent, otherwice data percent */
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else if (seg) {
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*percent = dm_make_percent(s->used_metadata_blocks,
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s->total_metadata_blocks);
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*total_numerator += s->used_metadata_blocks;
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*total_denominator += s->total_metadata_blocks;
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} else {
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*percent = dm_make_percent(s->used_data_blocks,
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s->total_data_blocks);
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*total_numerator += s->used_data_blocks;
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*total_denominator += s->total_data_blocks;
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}
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return 1;
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}
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# ifdef DMEVENTD
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/* FIXME Cache this */
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static int _target_registered(struct lv_segment *seg, int *pending, int *monitored)
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{
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return target_registered_with_dmeventd(seg->lv->vg->cmd,
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seg->segtype->dso,
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seg->lv, pending, monitored);
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}
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/* FIXME This gets run while suspended and performs banned operations. */
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static int _target_set_events(struct lv_segment *seg, int evmask, int set)
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{
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/* FIXME Make timeout (10) configurable */
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return target_register_events(seg->lv->vg->cmd,
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seg->segtype->dso,
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seg->lv, evmask, set, 10);
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}
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static int _target_register_events(struct lv_segment *seg,
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int events)
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{
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return _target_set_events(seg, events, 1);
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}
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static int _target_unregister_events(struct lv_segment *seg,
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int events)
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{
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return _target_set_events(seg, events, 0);
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}
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# endif /* DMEVENTD */
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#endif /* DEVMAPPER_SUPPORT */
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static void _thin_display(const struct lv_segment *seg)
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{
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log_print(" Device ID\t\t%u", seg->device_id);
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log_print(" ");
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}
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static int _thin_text_import(struct lv_segment *seg,
|
|
const struct dm_config_node *sn,
|
|
struct dm_hash_table *pv_hash __attribute__((unused)))
|
|
{
|
|
const char *lv_name;
|
|
struct logical_volume *pool_lv, *origin = NULL, *external_lv = NULL, *merge_lv = NULL;
|
|
struct generic_logical_volume *indirect_origin = NULL;
|
|
|
|
if (!dm_config_get_str(sn, "thin_pool", &lv_name))
|
|
return SEG_LOG_ERROR("Thin pool must be a string in");
|
|
|
|
if (!(pool_lv = find_lv(seg->lv->vg, lv_name)))
|
|
return SEG_LOG_ERROR("Unknown thin pool %s in", lv_name);
|
|
|
|
if (!dm_config_get_uint64(sn, "transaction_id", &seg->transaction_id))
|
|
return SEG_LOG_ERROR("Could not read transaction_id for");
|
|
|
|
if (dm_config_has_node(sn, "origin")) {
|
|
if (!dm_config_get_str(sn, "origin", &lv_name))
|
|
return SEG_LOG_ERROR("Origin must be a string in");
|
|
|
|
if (!(origin = find_lv(seg->lv->vg, lv_name)))
|
|
return SEG_LOG_ERROR("Unknown origin %s in", lv_name);
|
|
}
|
|
|
|
if (dm_config_has_node(sn, "merge")) {
|
|
if (!dm_config_get_str(sn, "merge", &lv_name))
|
|
return SEG_LOG_ERROR("Merge lv must be a string in");
|
|
if (!(merge_lv = find_lv(seg->lv->vg, lv_name)))
|
|
return SEG_LOG_ERROR("Unknown merge lv %s in", lv_name);
|
|
}
|
|
|
|
if (!dm_config_get_uint32(sn, "device_id", &seg->device_id))
|
|
return SEG_LOG_ERROR("Could not read device_id for");
|
|
|
|
if (seg->device_id > DM_THIN_MAX_DEVICE_ID)
|
|
return SEG_LOG_ERROR("Unsupported value %u for device_id",
|
|
seg->device_id);
|
|
|
|
if (dm_config_has_node(sn, "external_origin")) {
|
|
if (!dm_config_get_str(sn, "external_origin", &lv_name))
|
|
return SEG_LOG_ERROR("External origin must be a string in");
|
|
|
|
if (!(external_lv = find_lv(seg->lv->vg, lv_name)))
|
|
return SEG_LOG_ERROR("Unknown external origin %s in", lv_name);
|
|
}
|
|
|
|
if (!attach_pool_lv(seg, pool_lv, origin, indirect_origin, merge_lv))
|
|
return_0;
|
|
|
|
if (!attach_thin_external_origin(seg, external_lv))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _thin_text_export(const struct lv_segment *seg, struct formatter *f)
|
|
{
|
|
outf(f, "thin_pool = \"%s\"", seg->pool_lv->name);
|
|
outf(f, "transaction_id = %" PRIu64, seg->transaction_id);
|
|
outf(f, "device_id = %d", seg->device_id);
|
|
|
|
if (seg->external_lv)
|
|
outf(f, "external_origin = \"%s\"", seg->external_lv->name);
|
|
if (seg->origin)
|
|
outf(f, "origin = \"%s\"", seg->origin->name);
|
|
|
|
if (seg->merge_lv)
|
|
outf(f, "merge = \"%s\"", seg->merge_lv->name);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#ifdef DEVMAPPER_SUPPORT
|
|
static int _thin_add_target_line(struct dev_manager *dm,
|
|
struct dm_pool *mem,
|
|
struct cmd_context *cmd __attribute__((unused)),
|
|
void **target_state __attribute__((unused)),
|
|
struct lv_segment *seg,
|
|
const struct lv_activate_opts *laopts,
|
|
struct dm_tree_node *node, uint64_t len,
|
|
uint32_t *pvmove_mirror_count __attribute__((unused)))
|
|
{
|
|
char *pool_dlid, *external_dlid;
|
|
uint32_t device_id = seg->device_id;
|
|
unsigned attr;
|
|
|
|
if (!seg->pool_lv) {
|
|
log_error(INTERNAL_ERROR "Segment %s has no pool.",
|
|
seg->lv->name);
|
|
return 0;
|
|
}
|
|
if (!(pool_dlid = build_dm_uuid(mem, seg->pool_lv, lv_layer(seg->pool_lv)))) {
|
|
log_error("Failed to build uuid for pool LV %s.",
|
|
seg->pool_lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!laopts->no_merging) {
|
|
if (seg->merge_lv) {
|
|
log_error(INTERNAL_ERROR "Failed to add merged segment of %s.",
|
|
seg->lv->name);
|
|
return 0;
|
|
}
|
|
/*
|
|
* merge support for thinp snapshots is implemented by
|
|
* simply swapping the thinp device_id of the snapshot
|
|
* and origin.
|
|
*/
|
|
if (lv_is_merging_origin(seg->lv) && seg_is_thin_volume(find_snapshot(seg->lv)))
|
|
/* origin, use merging snapshot's device_id */
|
|
device_id = find_snapshot(seg->lv)->device_id;
|
|
}
|
|
|
|
if (!dm_tree_node_add_thin_target(node, len, pool_dlid, device_id))
|
|
return_0;
|
|
|
|
/* Add external origin LV */
|
|
if (seg->external_lv) {
|
|
if (!thin_pool_supports_external_origin(first_seg(seg->pool_lv), seg->external_lv))
|
|
return_0;
|
|
if (seg->external_lv->size < seg->lv->size) {
|
|
/* Validate target supports smaller external origin */
|
|
if (!_thin_target_present(cmd, NULL, &attr) ||
|
|
!(attr & THIN_FEATURE_EXTERNAL_ORIGIN_EXTEND)) {
|
|
log_error("Thin target does not support smaller size of external origin LV %s.",
|
|
seg->external_lv->name);
|
|
return 0;
|
|
}
|
|
}
|
|
if (!(external_dlid = build_dm_uuid(mem, seg->external_lv,
|
|
lv_layer(seg->external_lv)))) {
|
|
log_error("Failed to build uuid for external origin LV %s.",
|
|
seg->external_lv->name);
|
|
return 0;
|
|
}
|
|
if (!dm_tree_node_set_thin_external_origin(node, external_dlid))
|
|
return_0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _thin_target_percent(void **target_state __attribute__((unused)),
|
|
dm_percent_t *percent,
|
|
struct dm_pool *mem,
|
|
struct cmd_context *cmd __attribute__((unused)),
|
|
struct lv_segment *seg,
|
|
char *params,
|
|
uint64_t *total_numerator,
|
|
uint64_t *total_denominator)
|
|
{
|
|
struct dm_status_thin *s;
|
|
uint64_t csize;
|
|
|
|
/* Status for thin device is in sectors */
|
|
if (!dm_get_status_thin(mem, params, &s))
|
|
return_0;
|
|
|
|
if (s->fail)
|
|
*percent = DM_PERCENT_INVALID;
|
|
else if (seg) {
|
|
/* Pool allocates whole chunk so round-up to nearest one */
|
|
csize = first_seg(seg->pool_lv)->chunk_size;
|
|
csize = ((seg->lv->size + csize - 1) / csize) * csize;
|
|
if (s->mapped_sectors > csize) {
|
|
log_warn("WARNING: LV %s maps %s while the size is only %s.",
|
|
display_lvname(seg->lv),
|
|
display_size(cmd, s->mapped_sectors),
|
|
display_size(cmd, csize));
|
|
/* Don't show nonsense numbers like i.e. 1000% full */
|
|
s->mapped_sectors = csize;
|
|
}
|
|
|
|
*percent = dm_make_percent(s->mapped_sectors, csize);
|
|
*total_denominator += csize;
|
|
} else {
|
|
/* No lv_segment info here */
|
|
*percent = DM_PERCENT_INVALID;
|
|
/* FIXME: Using denominator to pass the mapped info upward? */
|
|
*total_denominator += s->highest_mapped_sector;
|
|
}
|
|
|
|
*total_numerator += s->mapped_sectors;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _thin_target_present(struct cmd_context *cmd,
|
|
const struct lv_segment *seg __attribute__((unused)),
|
|
unsigned *attributes)
|
|
{
|
|
/* List of features with their kernel target version */
|
|
static const struct feature {
|
|
uint16_t maj;
|
|
uint16_t min;
|
|
uint16_t thin_feature;
|
|
const char feature[24];
|
|
} _features[] = {
|
|
{ 1, 1, THIN_FEATURE_DISCARDS, "discards" },
|
|
{ 1, 1, THIN_FEATURE_EXTERNAL_ORIGIN, "external_origin" },
|
|
{ 1, 4, THIN_FEATURE_BLOCK_SIZE, "block_size" },
|
|
{ 1, 5, THIN_FEATURE_DISCARDS_NON_POWER_2, "discards_non_power_2" },
|
|
{ 1, 10, THIN_FEATURE_METADATA_RESIZE, "metadata_resize" },
|
|
{ 1, 10, THIN_FEATURE_ERROR_IF_NO_SPACE, "error_if_no_space" },
|
|
{ 1, 13, THIN_FEATURE_EXTERNAL_ORIGIN_EXTEND, "external_origin_extend" },
|
|
};
|
|
|
|
static const char _lvmconf[] = "global/thin_disabled_features";
|
|
static int _checked = 0;
|
|
static int _present = 0;
|
|
static unsigned _attrs = 0;
|
|
uint32_t maj, min, patchlevel;
|
|
unsigned i;
|
|
const struct dm_config_node *cn;
|
|
const struct dm_config_value *cv;
|
|
const char *str;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!_checked) {
|
|
_checked = 1;
|
|
|
|
if (!(_present = target_present_version(cmd, _thin_pool_module, 1,
|
|
&maj, &min, &patchlevel)))
|
|
return 0;
|
|
|
|
for (i = 0; i < DM_ARRAY_SIZE(_features); ++i)
|
|
if ((maj > _features[i].maj) ||
|
|
(maj == _features[i].maj && min >= _features[i].min))
|
|
_attrs |= _features[i].thin_feature;
|
|
else
|
|
log_very_verbose("Target %s does not support %s.",
|
|
_thin_pool_module,
|
|
_features[i].feature);
|
|
}
|
|
|
|
if (attributes) {
|
|
if (!_feature_mask) {
|
|
/* Support runtime lvm.conf changes, N.B. avoid 32 feature */
|
|
if ((cn = find_config_tree_array(cmd, global_thin_disabled_features_CFG, NULL))) {
|
|
for (cv = cn->v; cv; cv = cv->next) {
|
|
if (cv->type != DM_CFG_STRING) {
|
|
log_warn("WARNING: Ignoring invalid string in config file %s.",
|
|
_lvmconf);
|
|
continue;
|
|
}
|
|
str = cv->v.str;
|
|
if (!*str)
|
|
continue;
|
|
for (i = 0; i < DM_ARRAY_SIZE(_features); ++i)
|
|
if (strcasecmp(str, _features[i].feature) == 0)
|
|
_feature_mask |= _features[i].thin_feature;
|
|
}
|
|
}
|
|
_feature_mask = ~_feature_mask;
|
|
for (i = 0; i < DM_ARRAY_SIZE(_features); ++i)
|
|
if ((_attrs & _features[i].thin_feature) &&
|
|
!(_feature_mask & _features[i].thin_feature))
|
|
log_very_verbose("Target %s %s support disabled by %s",
|
|
_thin_pool_module,
|
|
_features[i].feature, _lvmconf);
|
|
}
|
|
*attributes = _attrs & _feature_mask;
|
|
}
|
|
|
|
return _present;
|
|
}
|
|
#endif
|
|
|
|
static void _thin_destroy(struct segment_type *segtype)
|
|
{
|
|
free((void *) segtype->dso);
|
|
free(segtype);
|
|
}
|
|
|
|
static const struct segtype_handler _thin_pool_ops = {
|
|
.display = _thin_pool_display,
|
|
.text_import = _thin_pool_text_import,
|
|
.text_import_area_count = _thin_pool_text_import_area_count,
|
|
.text_export = _thin_pool_text_export,
|
|
#ifdef DEVMAPPER_SUPPORT
|
|
.add_target_line = _thin_pool_add_target_line,
|
|
.target_percent = _thin_pool_target_percent,
|
|
.target_present = _thin_target_present,
|
|
.modules_needed = _thin_pool_modules_needed,
|
|
# ifdef DMEVENTD
|
|
.target_monitored = _target_registered,
|
|
.target_monitor_events = _target_register_events,
|
|
.target_unmonitor_events = _target_unregister_events,
|
|
# endif /* DMEVENTD */
|
|
#endif
|
|
.destroy = _thin_destroy,
|
|
};
|
|
|
|
static const struct segtype_handler _thin_ops = {
|
|
.display = _thin_display,
|
|
.text_import = _thin_text_import,
|
|
.text_export = _thin_text_export,
|
|
#ifdef DEVMAPPER_SUPPORT
|
|
.add_target_line = _thin_add_target_line,
|
|
.target_percent = _thin_target_percent,
|
|
.target_present = _thin_target_present,
|
|
.modules_needed = _thin_modules_needed,
|
|
#endif
|
|
.destroy = _thin_destroy,
|
|
};
|
|
|
|
#ifdef THIN_INTERNAL
|
|
int init_thin_segtypes(struct cmd_context *cmd, struct segtype_library *seglib)
|
|
#else /* Shared */
|
|
int init_multiple_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);
|
|
int init_multiple_segtypes(struct cmd_context *cmd, struct segtype_library *seglib)
|
|
#endif
|
|
{
|
|
static const struct {
|
|
const struct segtype_handler *ops;
|
|
const char name[12];
|
|
uint32_t flags;
|
|
} _reg_segtypes[] = {
|
|
{ &_thin_pool_ops, "thin-pool", SEG_THIN_POOL | SEG_CANNOT_BE_ZEROED |
|
|
SEG_ONLY_EXCLUSIVE | SEG_CAN_ERROR_WHEN_FULL },
|
|
/* FIXME Maybe use SEG_THIN_VOLUME instead of SEG_VIRTUAL */
|
|
{ &_thin_ops, "thin", SEG_THIN_VOLUME | SEG_VIRTUAL | SEG_ONLY_EXCLUSIVE }
|
|
};
|
|
|
|
struct segment_type *segtype;
|
|
unsigned i;
|
|
|
|
for (i = 0; i < DM_ARRAY_SIZE(_reg_segtypes); ++i) {
|
|
segtype = zalloc(sizeof(*segtype));
|
|
|
|
if (!segtype) {
|
|
log_error("Failed to allocate memory for %s segtype",
|
|
_reg_segtypes[i].name);
|
|
return 0;
|
|
}
|
|
|
|
segtype->ops = _reg_segtypes[i].ops;
|
|
segtype->name = _reg_segtypes[i].name;
|
|
segtype->flags = _reg_segtypes[i].flags;
|
|
|
|
#ifdef DEVMAPPER_SUPPORT
|
|
# ifdef DMEVENTD
|
|
segtype->dso = get_monitor_dso_path(cmd, dmeventd_thin_library_CFG);
|
|
|
|
if ((_reg_segtypes[i].flags & SEG_THIN_POOL) &&
|
|
segtype->dso)
|
|
segtype->flags |= SEG_MONITORED;
|
|
# endif /* DMEVENTD */
|
|
#endif
|
|
if (!lvm_register_segtype(seglib, segtype))
|
|
/* segtype is already destroyed */
|
|
return_0;
|
|
|
|
log_very_verbose("Initialised segtype: %s", segtype->name);
|
|
}
|
|
|
|
|
|
/* Reset mask for recalc */
|
|
_feature_mask = 0;
|
|
|
|
return 1;
|
|
}
|