1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * file.c
 4 *
 5 * Copyright (c) 1999 Al Smith
 6 *
 7 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
 8 */
 9
10#include <linux/buffer_head.h>
11#include "efs.h"
12
13int efs_get_block(struct inode *inode, sector_t iblock,
14		  struct buffer_head *bh_result, int create)
15{
16	int error = -EROFS;
17	long phys;
18
19	if (create)
20		return error;
21	if (iblock >= inode->i_blocks) {
22#ifdef DEBUG
23		/*
24		 * i have no idea why this happens as often as it does
25		 */
26		pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
27			__func__, block, inode->i_blocks, inode->i_size);
28#endif
29		return 0;
30	}
31	phys = efs_map_block(inode, iblock);
32	if (phys)
33		map_bh(bh_result, inode->i_sb, phys);
34	return 0;
35}
36
37int efs_bmap(struct inode *inode, efs_block_t block) {
38
39	if (block < 0) {
40		pr_warn("%s(): block < 0\n", __func__);
41		return 0;
42	}
43
44	/* are we about to read past the end of a file ? */
45	if (!(block < inode->i_blocks)) {
46#ifdef DEBUG
47		/*
48		 * i have no idea why this happens as often as it does
49		 */
50		pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
51			__func__, block, inode->i_blocks, inode->i_size);
52#endif
53		return 0;
54	}
55
56	return efs_map_block(inode, block);
57}

 
 1/*
 2 * file.c
 3 *
 4 * Copyright (c) 1999 Al Smith
 5 *
 6 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
 7 */
 8
 9#include <linux/buffer_head.h>
10#include "efs.h"
11
12int efs_get_block(struct inode *inode, sector_t iblock,
13		  struct buffer_head *bh_result, int create)
14{
15	int error = -EROFS;
16	long phys;
17
18	if (create)
19		return error;
20	if (iblock >= inode->i_blocks) {
21#ifdef DEBUG
22		/*
23		 * i have no idea why this happens as often as it does
24		 */
25		pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
26			__func__, block, inode->i_blocks, inode->i_size);
27#endif
28		return 0;
29	}
30	phys = efs_map_block(inode, iblock);
31	if (phys)
32		map_bh(bh_result, inode->i_sb, phys);
33	return 0;
34}
35
36int efs_bmap(struct inode *inode, efs_block_t block) {
37
38	if (block < 0) {
39		pr_warn("%s(): block < 0\n", __func__);
40		return 0;
41	}
42
43	/* are we about to read past the end of a file ? */
44	if (!(block < inode->i_blocks)) {
45#ifdef DEBUG
46		/*
47		 * i have no idea why this happens as often as it does
48		 */
49		pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
50			__func__, block, inode->i_blocks, inode->i_size);
51#endif
52		return 0;
53	}
54
55	return efs_map_block(inode, block);
56}