dev.c (326ea986ac150acdc7656d57fca647db80b50158) dev.c (7c4213f6a52f35ff6ba2d97aa4eb04cbfc963b86)
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

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54
55
56 if (reiserfs_block_dev_desc == NULL)
57 return 0;
58
59
60 if (byte_offset != 0) {
61 /* read first part which isn't aligned with start of sector */
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

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

54
55
56 if (reiserfs_block_dev_desc == NULL)
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->dev,
63 part_info->start + sector, 1,
64 (unsigned long *)sec_buf) != 1) {
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) {
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);
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);
76 if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
77 part_info->start + sector, block_len/SECTOR_SIZE,
78 (unsigned long *)buf) != block_len/SECTOR_SIZE) {
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) {
79 printf (" ** reiserfs_devread() read error - block\n");
80 return 0;
81 }
82 buf+=block_len;
83 byte_len-=block_len;
84 sector+= block_len/SECTOR_SIZE;
85
86 if ( byte_len != 0 ) {
87 /* read rest of data which are not in whole sector */
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 */
88 if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
89 part_info->start + sector, 1,
90 (unsigned long *)sec_buf) != 1) {
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) {
91 printf (" ** reiserfs_devread() read error - last part\n");
92 return 0;
93 }
94 memcpy(buf, sec_buf, byte_len);
95 }
96
97 return 1;
98}
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}