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We can create more than one target on a lightnvm device by specifying its begin lun and end lun. But only specify the physical address area is not enough, we need to get the corresponding non- intersection logical address area division from the backend device's logcial address space. Otherwise the targets on the device might use the same logical addresses cause incorrect information in the device's l2p table. Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@fb.com>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
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* Copyright: Matias Bjorling <mb@bjorling.me>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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*/
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#ifndef GENNVM_H_
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#define GENNVM_H_
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#include <linux/module.h>
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#include <linux/vmalloc.h>
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#include <linux/lightnvm.h>
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struct gen_lun {
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struct nvm_lun vlun;
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int reserved_blocks;
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/* lun block lists */
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struct list_head used_list; /* In-use blocks */
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struct list_head free_list; /* Not used blocks i.e. released
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* and ready for use
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*/
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struct list_head bb_list; /* Bad blocks. Mutually exclusive with
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* free_list and used_list
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*/
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};
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struct gen_nvm {
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struct nvm_dev *dev;
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int nr_luns;
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struct gen_lun *luns;
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struct list_head area_list;
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};
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struct gennvm_area {
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struct list_head list;
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sector_t begin;
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sector_t end; /* end is excluded */
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};
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#define gennvm_for_each_lun(bm, lun, i) \
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for ((i) = 0, lun = &(bm)->luns[0]; \
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(i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)])
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#endif /* GENNVM_H_ */
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