dev.c (7c4213f6a52f35ff6ba2d97aa4eb04cbfc963b86) dev.c (4101f6879256720b30df712089a3df18565f9203)
1/*
2 * (C) Copyright 2003 - 2004
3 * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8
9#include <common.h>
10#include <config.h>
11#include <reiserfs.h>
12
13#include "reiserfs_private.h"
14
1/*
2 * (C) Copyright 2003 - 2004
3 * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8
9#include <common.h>
10#include <config.h>
11#include <reiserfs.h>
12
13#include "reiserfs_private.h"
14
15static block_dev_desc_t *reiserfs_block_dev_desc;
15static struct blk_desc *reiserfs_blk_desc;
16static disk_partition_t *part_info;
17
18
16static disk_partition_t *part_info;
17
18
19void reiserfs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
19void reiserfs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
20{
20{
21 reiserfs_block_dev_desc = rbdd;
21 reiserfs_blk_desc = rbdd;
22 part_info = info;
23}
24
25
26int reiserfs_devread (int sector, int byte_offset, int byte_len, char *buf)
27{
28 char sec_buf[SECTOR_SIZE];
29 unsigned block_len;

--- 18 unchanged lines hidden (view full) ---

48 sector += byte_offset >> SECTOR_BITS;
49 byte_offset &= SECTOR_SIZE - 1;
50
51#if defined(DEBUG)
52 printf (" <%d, %d, %d> ", sector, byte_offset, byte_len);
53#endif
54
55
22 part_info = info;
23}
24
25
26int reiserfs_devread (int sector, int byte_offset, int byte_len, char *buf)
27{
28 char sec_buf[SECTOR_SIZE];
29 unsigned block_len;

--- 18 unchanged lines hidden (view full) ---

48 sector += byte_offset >> SECTOR_BITS;
49 byte_offset &= SECTOR_SIZE - 1;
50
51#if defined(DEBUG)
52 printf (" <%d, %d, %d> ", sector, byte_offset, byte_len);
53#endif
54
55
56 if (reiserfs_block_dev_desc == NULL)
56 if (reiserfs_blk_desc == NULL)
57 return 0;
58
59
60 if (byte_offset != 0) {
61 /* read first part which isn't aligned with start of sector */
57 return 0;
58
59
60 if (byte_offset != 0) {
61 /* read first part which isn't aligned with start of sector */
62 if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc,
63 part_info->start +
64 sector,
65 1, (void *)sec_buf)
66 != 1) {
62 if (reiserfs_blk_desc->block_read(reiserfs_blk_desc,
63 part_info->start + sector,
64 1, (void *)sec_buf) != 1) {
67 printf (" ** reiserfs_devread() read error\n");
68 return 0;
69 }
70 memcpy(buf, sec_buf+byte_offset, min(SECTOR_SIZE-byte_offset, byte_len));
71 buf+=min(SECTOR_SIZE-byte_offset, byte_len);
72 byte_len-=min(SECTOR_SIZE-byte_offset, byte_len);
73 sector++;
74 }
75
76 /* read sector aligned part */
77 block_len = byte_len & ~(SECTOR_SIZE-1);
65 printf (" ** reiserfs_devread() read error\n");
66 return 0;
67 }
68 memcpy(buf, sec_buf+byte_offset, min(SECTOR_SIZE-byte_offset, byte_len));
69 buf+=min(SECTOR_SIZE-byte_offset, byte_len);
70 byte_len-=min(SECTOR_SIZE-byte_offset, byte_len);
71 sector++;
72 }
73
74 /* read sector aligned part */
75 block_len = byte_len & ~(SECTOR_SIZE-1);
78 if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc,
79 part_info->start + sector,
80 block_len / SECTOR_SIZE,
81 (void *)buf)
82 != block_len/SECTOR_SIZE) {
76 if (reiserfs_blk_desc->block_read(reiserfs_blk_desc,
77 part_info->start + sector,
78 block_len / SECTOR_SIZE, (void *)buf)
79 != block_len/SECTOR_SIZE) {
83 printf (" ** reiserfs_devread() read error - block\n");
84 return 0;
85 }
86 buf+=block_len;
87 byte_len-=block_len;
88 sector+= block_len/SECTOR_SIZE;
89
90 if ( byte_len != 0 ) {
91 /* read rest of data which are not in whole sector */
80 printf (" ** reiserfs_devread() read error - block\n");
81 return 0;
82 }
83 buf+=block_len;
84 byte_len-=block_len;
85 sector+= block_len/SECTOR_SIZE;
86
87 if ( byte_len != 0 ) {
88 /* read rest of data which are not in whole sector */
92 if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc,
93 part_info->start +
94 sector,
95 1, (void *)sec_buf)
96 != 1) {
89 if (reiserfs_blk_desc->block_read(reiserfs_blk_desc,
90 part_info->start + sector,
91 1, (void *)sec_buf) != 1) {
97 printf (" ** reiserfs_devread() read error - last part\n");
98 return 0;
99 }
100 memcpy(buf, sec_buf, byte_len);
101 }
102
103 return 1;
104}
92 printf (" ** reiserfs_devread() read error - last part\n");
93 return 0;
94 }
95 memcpy(buf, sec_buf, byte_len);
96 }
97
98 return 1;
99}