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67 lines
1.3 KiB
67 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/buffer_head.h> |
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#include <linux/slab.h> |
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#include "minix.h" |
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enum {DEPTH = 3, DIRECT = 7}; /* Only double indirect */ |
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typedef u16 block_t; /* 16 bit, host order */ |
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static inline unsigned long block_to_cpu(block_t n) |
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{ |
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return n; |
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} |
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static inline block_t cpu_to_block(unsigned long n) |
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{ |
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return n; |
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} |
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static inline block_t *i_data(struct inode *inode) |
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{ |
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return (block_t *)minix_i(inode)->u.i1_data; |
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} |
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static int block_to_path(struct inode * inode, long block, int offsets[DEPTH]) |
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{ |
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int n = 0; |
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if (block < 0) { |
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printk("MINIX-fs: block_to_path: block %ld < 0 on dev %pg\n", |
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block, inode->i_sb->s_bdev); |
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return 0; |
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} |
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if ((u64)block * BLOCK_SIZE >= inode->i_sb->s_maxbytes) |
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return 0; |
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if (block < 7) { |
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offsets[n++] = block; |
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} else if ((block -= 7) < 512) { |
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offsets[n++] = 7; |
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offsets[n++] = block; |
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} else { |
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block -= 512; |
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offsets[n++] = 8; |
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offsets[n++] = block>>9; |
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offsets[n++] = block & 511; |
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} |
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return n; |
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} |
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#include "itree_common.c" |
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int V1_minix_get_block(struct inode * inode, long block, |
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struct buffer_head *bh_result, int create) |
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{ |
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return get_block(inode, block, bh_result, create); |
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} |
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void V1_minix_truncate(struct inode * inode) |
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{ |
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truncate(inode); |
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} |
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unsigned V1_minix_blocks(loff_t size, struct super_block *sb) |
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{ |
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return nblocks(size, sb); |
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}
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