nvme_ns: add function to get read value of unmapped blocks
Change-Id: I52dc3038d239661421760ceccfbbf841cc63a18a Signed-off-by: Seth Howell <seth.howell@intel.com> Reviewed-on: https://review.gerrithub.io/372000 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>
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@ -910,6 +910,15 @@ uint32_t spdk_nvme_ns_get_md_size(struct spdk_nvme_ns *ns);
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*/
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bool spdk_nvme_ns_supports_extended_lba(struct spdk_nvme_ns *ns);
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/**
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* \brief Determine the value returned when reading deallocated blocks.
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*
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* If deallocated blocks return 0, the deallocate command can be used as a more efficient alternative
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* to the write_zeroes command, especially for large requests.
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*/
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enum spdk_nvme_dealloc_logical_block_read_value spdk_nvme_ns_get_dealloc_logical_block_read_value(
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struct spdk_nvme_ns *ns);
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/**
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* \brief Namespace command support flags.
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*/
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@ -185,6 +185,13 @@ spdk_nvme_ns_get_data(struct spdk_nvme_ns *ns)
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return _nvme_ns_get_data(ns);
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}
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enum spdk_nvme_dealloc_logical_block_read_value spdk_nvme_ns_get_dealloc_logical_block_read_value(
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struct spdk_nvme_ns *ns)
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{
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const struct spdk_nvme_ns_data *data = spdk_nvme_ns_get_data(ns);
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return data->dlfeat.bits.read_value;
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}
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int nvme_ns_construct(struct spdk_nvme_ns *ns, uint16_t id,
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struct spdk_nvme_ctrlr *ctrlr)
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{
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