1efb301462
Volume close should not close underlying device until all I/O targeting this volume are deallocated. To achieve this a reference counter is added to volume. Counter value matches number of I/O objects associated with volume. Counter is freezed when volume is closed, blocking allocation of new I/O objects. Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/*
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* Copyright(c) 2012-2018 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause-Clear
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*/
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#ifndef __OCF_VOLUME_PRIV_H__
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#define __OCF_VOLUME_PRIV_H__
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#include "ocf_env.h"
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#include "ocf_io_priv.h"
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#include "utils/utils_refcnt.h"
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struct ocf_volume_type {
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const struct ocf_volume_properties *properties;
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env_allocator *allocator;
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};
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struct ocf_volume {
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ocf_volume_type_t type;
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struct ocf_volume_uuid uuid;
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bool opened;
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bool uuid_copy;
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void *priv;
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ocf_cache_t cache;
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struct list_head core_pool_item;
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struct {
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unsigned discard_zeroes:1;
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/* true if reading discarded pages returns 0 */
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} features;
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struct ocf_refcnt refcnt;
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};
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int ocf_volume_type_init(struct ocf_volume_type **type,
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const struct ocf_volume_properties *properties);
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void ocf_volume_type_deinit(struct ocf_volume_type *type);
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void ocf_volume_move(ocf_volume_t volume, ocf_volume_t from);
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void ocf_volume_set_uuid(ocf_volume_t volume,
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const struct ocf_volume_uuid *uuid);
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static inline void ocf_volume_submit_metadata(struct ocf_io *io)
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{
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ENV_BUG_ON(!io->volume->type->properties->ops.submit_metadata);
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io->volume->type->properties->ops.submit_metadata(io);
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}
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static inline void ocf_volume_submit_write_zeroes(struct ocf_io *io)
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{
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ENV_BUG_ON(!io->volume->type->properties->ops.submit_write_zeroes);
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io->volume->type->properties->ops.submit_write_zeroes(io);
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}
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#endif /*__OCF_VOLUME_PRIV_H__ */
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