52824adaaf
Starting cache in a standby mode requires access to a valid cleaning policy type. If the policy is stored only in the superblock, it may be overridden by one of the metadata passive updates. To prevent losing the information it should be stored in cache's runtime metadata. Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
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* Copyright(c) 2012-2021 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "ocf/ocf.h"
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#include "ocf_priv.h"
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#include "metadata/metadata.h"
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#include "engine/cache_engine.h"
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#include "utils/utils_user_part.h"
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int ocf_cache_io_class_get_info(ocf_cache_t cache, uint32_t io_class,
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struct ocf_io_class_info *info)
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{
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ocf_part_id_t part_id = io_class;
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struct ocf_part *part;
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OCF_CHECK_NULL(cache);
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if (!info)
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return -OCF_ERR_INVAL;
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if (io_class >= OCF_USER_IO_CLASS_MAX)
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return -OCF_ERR_INVAL;
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if (!ocf_user_part_is_valid(&cache->user_parts[part_id])) {
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/* Partition does not exist */
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return -OCF_ERR_IO_CLASS_NOT_EXIST;
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}
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if (env_strncpy(info->name, OCF_IO_CLASS_NAME_MAX - 1,
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cache->user_parts[part_id].config->name,
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sizeof(cache->user_parts[part_id].config->name))) {
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return -OCF_ERR_INVAL;
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}
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part = &cache->user_parts[part_id].part;
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info->priority = cache->user_parts[part_id].config->priority;
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info->curr_size = ocf_cache_is_device_attached(cache) ?
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env_atomic_read(&part->runtime->curr_size) : 0;
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info->min_size = cache->user_parts[part_id].config->min_size;
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info->max_size = cache->user_parts[part_id].config->max_size;
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info->cleaning_policy_type = cache->cleaner.policy;
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info->cache_mode = cache->user_parts[part_id].config->cache_mode;
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return 0;
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}
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int ocf_io_class_visit(ocf_cache_t cache, ocf_io_class_visitor_t visitor,
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void *cntx)
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{
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struct ocf_user_part *user_part;
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ocf_part_id_t part_id;
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int result = 0;
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OCF_CHECK_NULL(cache);
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if (!visitor)
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return -OCF_ERR_INVAL;
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for_each_user_part(cache, user_part, part_id) {
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if (!ocf_user_part_is_valid(user_part))
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continue;
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result = visitor(cache, part_id, cntx);
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if (result)
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break;
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}
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return result;
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}
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