* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
*
- * 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.
+ * ext4write : Based on generic ext4 protocol.
*
- * 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>
-#include <malloc.h>
#include <ext_common.h>
#include <ext4fs.h>
-#include <linux/stat.h>
-#include <linux/time.h>
-#include <asm/byteorder.h>
#include "ext4_common.h"
int ext4fs_symlinknest;
-block_dev_desc_t *ext4_dev_desc;
+struct ext_filesystem ext_fs;
struct ext_filesystem *get_fs(void)
{
- if (ext4_dev_desc == NULL || ext4_dev_desc->priv == NULL)
- printf("Invalid Input Arguments %s\n", __func__);
-
- return ext4_dev_desc->priv;
-}
-
-int init_fs(block_dev_desc_t *dev_desc)
-{
- struct ext_filesystem *fs;
- if (dev_desc == NULL) {
- printf("Invalid Input Arguments %s\n", __func__);
- return -EINVAL;
- }
-
- fs = zalloc(sizeof(struct ext_filesystem));
- if (fs == NULL) {
- printf("malloc failed: %s\n", __func__);
- return -ENOMEM;
- }
-
- fs->dev_desc = dev_desc;
- dev_desc->priv = fs;
-
- return 0;
-}
-
-void deinit_fs(block_dev_desc_t *dev_desc)
-{
- if (dev_desc == NULL) {
- printf("Invalid Input Arguments %s\n", __func__);
- return;
- }
- free(dev_desc->priv);
- dev_desc->priv = NULL;
+ return &ext_fs;
}
void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot)
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 ext4fs_read_file(ext4fs_file, 0, len, buf);
}
+
+int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
+ disk_partition_t *fs_partition)
+{
+ ext4fs_set_blk_dev(fs_dev_desc, fs_partition);
+
+ if (!ext4fs_mount(fs_partition->size)) {
+ ext4fs_close();
+ return -1;
+ }
+
+ return 0;
+}
+
+int ext4_read_file(const char *filename, void *buf, int offset, int len)
+{
+ int file_len;
+ int len_read;
+
+ if (offset != 0) {
+ printf("** Cannot support non-zero offset **\n");
+ return -1;
+ }
+
+ file_len = ext4fs_open(filename);
+ if (file_len < 0) {
+ printf("** File not found %s **\n", filename);
+ return -1;
+ }
+
+ if (len == 0)
+ len = file_len;
+
+ len_read = ext4fs_read(buf, len);
+
+ return len_read;
+}
projects / platform / kernel / u-boot.git / blobdiff