*
* ext4write : Based on generic ext4 protocol.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
int ext4fs_read_file(struct ext2fs_node *node, int pos,
unsigned int len, char *buf)
{
+ struct ext_filesystem *fs = get_fs();
int i;
- int blockcnt;
- int log2blocksize = LOG2_EXT2_BLOCK_SIZE(node->data);
- int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS);
+ lbaint_t blockcnt;
+ int log2blksz = fs->dev_desc->log2blksz;
+ int log2_fs_blocksize = LOG2_BLOCK_SIZE(node->data) - log2blksz;
+ int blocksize = (1 << (log2_fs_blocksize + log2blksz));
unsigned int filesize = __le32_to_cpu(node->inode.size);
- int previous_block_number = -1;
- int delayed_start = 0;
- int delayed_extent = 0;
- int delayed_skipfirst = 0;
- int delayed_next = 0;
+ lbaint_t previous_block_number = -1;
+ lbaint_t delayed_start = 0;
+ lbaint_t delayed_extent = 0;
+ lbaint_t delayed_skipfirst = 0;
+ lbaint_t delayed_next = 0;
char *delayed_buf = NULL;
short status;
blockcnt = ((len + pos) + blocksize - 1) / blocksize;
for (i = pos / blocksize; i < blockcnt; i++) {
- int blknr;
+ lbaint_t blknr;
int blockoff = pos % blocksize;
int blockend = blocksize;
int skipfirst = 0;
if (blknr < 0)
return -1;
- blknr = blknr << log2blocksize;
+ blknr = blknr << log2_fs_blocksize;
/* Last block. */
if (i == blockcnt - 1) {
if (previous_block_number != -1) {
if (delayed_next == blknr) {
delayed_extent += blockend;
- delayed_next += blockend >> SECTOR_BITS;
+ delayed_next += blockend >> log2blksz;
} else { /* spill */
status = ext4fs_devread(delayed_start,
delayed_skipfirst,
delayed_skipfirst = skipfirst;
delayed_buf = buf;
delayed_next = blknr +
- (blockend >> SECTOR_BITS);
+ (blockend >> log2blksz);
}
} else {
previous_block_number = blknr;
delayed_skipfirst = skipfirst;
delayed_buf = buf;
delayed_next = blknr +
- (blockend >> SECTOR_BITS);
+ (blockend >> log2blksz);
}
} else {
if (previous_block_number != -1) {
return 0;
}
+int ext4fs_exists(const char *filename)
+{
+ int file_len;
+
+ file_len = ext4fs_open(filename);
+ return file_len >= 0;
+}
+
int ext4fs_read(char *buf, unsigned len)
{
if (ext4fs_root == NULL || ext4fs_file == NULL)