cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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itree_v1.c (1335B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/buffer_head.h>
      3#include <linux/slab.h>
      4#include "minix.h"
      5
      6enum {DEPTH = 3, DIRECT = 7};	/* Only double indirect */
      7
      8typedef u16 block_t;	/* 16 bit, host order */
      9
     10static inline unsigned long block_to_cpu(block_t n)
     11{
     12	return n;
     13}
     14
     15static inline block_t cpu_to_block(unsigned long n)
     16{
     17	return n;
     18}
     19
     20static inline block_t *i_data(struct inode *inode)
     21{
     22	return (block_t *)minix_i(inode)->u.i1_data;
     23}
     24
     25static int block_to_path(struct inode * inode, long block, int offsets[DEPTH])
     26{
     27	int n = 0;
     28
     29	if (block < 0) {
     30		printk("MINIX-fs: block_to_path: block %ld < 0 on dev %pg\n",
     31			block, inode->i_sb->s_bdev);
     32		return 0;
     33	}
     34	if ((u64)block * BLOCK_SIZE >= inode->i_sb->s_maxbytes)
     35		return 0;
     36
     37	if (block < 7) {
     38		offsets[n++] = block;
     39	} else if ((block -= 7) < 512) {
     40		offsets[n++] = 7;
     41		offsets[n++] = block;
     42	} else {
     43		block -= 512;
     44		offsets[n++] = 8;
     45		offsets[n++] = block>>9;
     46		offsets[n++] = block & 511;
     47	}
     48	return n;
     49}
     50
     51#include "itree_common.c"
     52
     53int V1_minix_get_block(struct inode * inode, long block,
     54			struct buffer_head *bh_result, int create)
     55{
     56	return get_block(inode, block, bh_result, create);
     57}
     58
     59void V1_minix_truncate(struct inode * inode)
     60{
     61	truncate(inode);
     62}
     63
     64unsigned V1_minix_blocks(loff_t size, struct super_block *sb)
     65{
     66	return nblocks(size, sb);
     67}