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0aecfa662e
This commit adds the DUMMY flag to the rd_mcp backend that forces a logical unit to report itself as not connected device of an unknown type. Essentially this allows users to create devices identical to the device for the virtual LUN 0, making it possible to explicitly create a LUN 0 device and configure its WWNs (e.g. vendor or product name). Link: https://lore.kernel.org/r/20210322200938.53300-2-k.shelekhin@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef TARGET_CORE_RD_H
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#define TARGET_CORE_RD_H
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#include <linux/module.h>
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#include <linux/types.h>
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#include <target/target_core_base.h>
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#define RD_HBA_VERSION "v4.0"
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#define RD_MCP_VERSION "4.0"
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/* Largest piece of memory kmalloc can allocate */
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#define RD_MAX_ALLOCATION_SIZE 65536
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#define RD_DEVICE_QUEUE_DEPTH 32
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#define RD_MAX_DEVICE_QUEUE_DEPTH 128
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#define RD_BLOCKSIZE 512
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/* Used in target_core_init_configfs() for virtual LUN 0 access */
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int __init rd_module_init(void);
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void rd_module_exit(void);
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struct rd_dev_sg_table {
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u32 page_start_offset;
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u32 page_end_offset;
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u32 rd_sg_count;
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struct scatterlist *sg_table;
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} ____cacheline_aligned;
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#define RDF_HAS_PAGE_COUNT 0x01
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#define RDF_NULLIO 0x02
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#define RDF_DUMMY 0x04
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struct rd_dev {
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struct se_device dev;
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u32 rd_flags;
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/* Unique Ramdisk Device ID in Ramdisk HBA */
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u32 rd_dev_id;
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/* Total page count for ramdisk device */
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u32 rd_page_count;
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/* Number of SG tables in sg_table_array */
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u32 sg_table_count;
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/* Number of SG tables in sg_prot_array */
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u32 sg_prot_count;
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/* Array of rd_dev_sg_table_t containing scatterlists */
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struct rd_dev_sg_table *sg_table_array;
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/* Array of rd_dev_sg_table containing protection scatterlists */
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struct rd_dev_sg_table *sg_prot_array;
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/* Ramdisk HBA device is connected to */
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struct rd_host *rd_host;
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} ____cacheline_aligned;
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struct rd_host {
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u32 rd_host_dev_id_count;
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u32 rd_host_id; /* Unique Ramdisk Host ID */
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} ____cacheline_aligned;
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#endif /* TARGET_CORE_RD_H */
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