From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- fs/minix/itree_v1.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 fs/minix/itree_v1.c (limited to 'fs/minix/itree_v1.c') diff --git a/fs/minix/itree_v1.c b/fs/minix/itree_v1.c new file mode 100644 index 000000000..1fed90604 --- /dev/null +++ b/fs/minix/itree_v1.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include "minix.h" + +enum {DEPTH = 3, DIRECT = 7}; /* Only double indirect */ + +typedef u16 block_t; /* 16 bit, host order */ + +static inline unsigned long block_to_cpu(block_t n) +{ + return n; +} + +static inline block_t cpu_to_block(unsigned long n) +{ + return n; +} + +static inline block_t *i_data(struct inode *inode) +{ + return (block_t *)minix_i(inode)->u.i1_data; +} + +static int block_to_path(struct inode * inode, long block, int offsets[DEPTH]) +{ + int n = 0; + + if (block < 0) { + printk("MINIX-fs: block_to_path: block %ld < 0 on dev %pg\n", + block, inode->i_sb->s_bdev); + return 0; + } + if ((u64)block * BLOCK_SIZE >= inode->i_sb->s_maxbytes) + return 0; + + if (block < 7) { + offsets[n++] = block; + } else if ((block -= 7) < 512) { + offsets[n++] = 7; + offsets[n++] = block; + } else { + block -= 512; + offsets[n++] = 8; + offsets[n++] = block>>9; + offsets[n++] = block & 511; + } + return n; +} + +#include "itree_common.c" + +int V1_minix_get_block(struct inode * inode, long block, + struct buffer_head *bh_result, int create) +{ + return get_block(inode, block, bh_result, create); +} + +void V1_minix_truncate(struct inode * inode) +{ + truncate(inode); +} + +unsigned V1_minix_blocks(loff_t size, struct super_block *sb) +{ + return nblocks(size, sb); +} -- cgit v1.2.3