+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2011 - 2012 Samsung Electronics
* EXT4 filesystem implementation in Uboot by
* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
*
* ext4write : Based on generic ext4 protocol.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <ext_common.h>
#include <ext4fs.h>
#include "ext4_common.h"
+#include <div64.h>
int ext4fs_symlinknest;
struct ext_filesystem ext_fs;
* Optimized read file API : collects and defers contiguous sector
* reads into one potentially more efficient larger sequential read action
*/
-int ext4fs_read_file(struct ext2fs_node *node, int pos,
- unsigned int len, char *buf)
+int ext4fs_read_file(struct ext2fs_node *node, loff_t pos,
+ loff_t len, char *buf, loff_t *actread)
{
struct ext_filesystem *fs = get_fs();
int i;
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);
+ unsigned int filesize = le32_to_cpu(node->inode.size);
lbaint_t previous_block_number = -1;
lbaint_t delayed_start = 0;
lbaint_t delayed_extent = 0;
lbaint_t delayed_next = 0;
char *delayed_buf = NULL;
short status;
+ struct ext_block_cache cache;
+
+ ext_cache_init(&cache);
+
+ if (blocksize <= 0)
+ return -1;
/* Adjust len so it we can't read past the end of the file. */
- if (len > filesize)
- len = filesize;
+ if (len + pos > filesize)
+ len = (filesize - pos);
- blockcnt = ((len + pos) + blocksize - 1) / blocksize;
+ blockcnt = lldiv(((len + pos) + blocksize - 1), blocksize);
- for (i = pos / blocksize; i < blockcnt; i++) {
- lbaint_t blknr;
- int blockoff = pos % blocksize;
+ for (i = lldiv(pos, blocksize); i < blockcnt; i++) {
+ long int blknr;
+ int blockoff = pos - (blocksize * i);
int blockend = blocksize;
int skipfirst = 0;
- blknr = read_allocated_block(&(node->inode), i);
- if (blknr < 0)
+ blknr = read_allocated_block(&node->inode, i, &cache);
+ if (blknr < 0) {
+ ext_cache_fini(&cache);
return -1;
+ }
blknr = blknr << log2_fs_blocksize;
/* Last block. */
if (i == blockcnt - 1) {
- blockend = (len + pos) % blocksize;
+ blockend = (len + pos) - (blocksize * i);
/* The last portion is exactly blocksize. */
if (!blockend)
}
/* First block. */
- if (i == pos / blocksize) {
+ if (i == lldiv(pos, blocksize)) {
skipfirst = blockoff;
blockend -= skipfirst;
}
delayed_skipfirst,
delayed_extent,
delayed_buf);
- if (status == 0)
+ if (status == 0) {
+ ext_cache_fini(&cache);
return -1;
+ }
previous_block_number = blknr;
delayed_start = blknr;
delayed_extent = blockend;
(blockend >> log2blksz);
}
} else {
+ int n;
if (previous_block_number != -1) {
/* spill */
status = ext4fs_devread(delayed_start,
delayed_skipfirst,
delayed_extent,
delayed_buf);
- if (status == 0)
+ if (status == 0) {
+ ext_cache_fini(&cache);
return -1;
+ }
previous_block_number = -1;
}
- memset(buf, 0, blocksize - skipfirst);
+ /* Zero no more than `len' bytes. */
+ n = blocksize - skipfirst;
+ if (n > len)
+ n = len;
+ memset(buf, 0, n);
}
buf += blocksize - skipfirst;
}
status = ext4fs_devread(delayed_start,
delayed_skipfirst, delayed_extent,
delayed_buf);
- if (status == 0)
+ if (status == 0) {
+ ext_cache_fini(&cache);
return -1;
+ }
previous_block_number = -1;
}
- return len;
+ *actread = len;
+ ext_cache_fini(&cache);
+ return 0;
}
int ext4fs_ls(const char *dirname)
{
- struct ext2fs_node *dirnode;
+ struct ext2fs_node *dirnode = NULL;
int status;
if (dirname == NULL)
FILETYPE_DIRECTORY);
if (status != 1) {
printf("** Can not find directory. **\n");
+ if (dirnode)
+ ext4fs_free_node(dirnode, &ext4fs_root->diropen);
return 1;
}
int ext4fs_exists(const char *filename)
{
- int file_len;
+ loff_t file_len;
+ int ret;
- file_len = ext4fs_open(filename);
- return file_len >= 0;
+ ret = ext4fs_open(filename, &file_len);
+ return ret == 0;
}
-int ext4fs_size(const char *filename)
+int ext4fs_size(const char *filename, loff_t *size)
{
- return ext4fs_open(filename);
+ return ext4fs_open(filename, size);
}
-int ext4fs_read(char *buf, unsigned len)
+int ext4fs_read(char *buf, loff_t offset, loff_t len, loff_t *actread)
{
if (ext4fs_root == NULL || ext4fs_file == NULL)
- return 0;
+ return -1;
- return ext4fs_read_file(ext4fs_file, 0, len, buf);
+ return ext4fs_read_file(ext4fs_file, offset, len, buf, actread);
}
-int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
+int ext4fs_probe(struct blk_desc *fs_dev_desc,
disk_partition_t *fs_partition)
{
ext4fs_set_blk_dev(fs_dev_desc, fs_partition);
return 0;
}
-int ext4_read_file(const char *filename, void *buf, int offset, int len)
+int ext4_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
+ loff_t *len_read)
{
- int file_len;
- int len_read;
-
- if (offset != 0) {
- printf("** Cannot support non-zero offset **\n");
- return -1;
- }
+ loff_t file_len;
+ int ret;
- file_len = ext4fs_open(filename);
- if (file_len < 0) {
+ ret = ext4fs_open(filename, &file_len);
+ if (ret < 0) {
printf("** File not found %s **\n", filename);
return -1;
}
if (len == 0)
len = file_len;
- len_read = ext4fs_read(buf, len);
+ return ext4fs_read(buf, offset, len, len_read);
+}
+
+int ext4fs_uuid(char *uuid_str)
+{
+ if (ext4fs_root == NULL)
+ return -1;
+
+#ifdef CONFIG_LIB_UUID
+ uuid_bin_to_str((unsigned char *)ext4fs_root->sblock.unique_id,
+ uuid_str, UUID_STR_FORMAT_STD);
+
+ return 0;
+#else
+ return -ENOSYS;
+#endif
+}
+
+void ext_cache_init(struct ext_block_cache *cache)
+{
+ memset(cache, 0, sizeof(*cache));
+}
+
+void ext_cache_fini(struct ext_block_cache *cache)
+{
+ free(cache->buf);
+ ext_cache_init(cache);
+}
- return len_read;
+int ext_cache_read(struct ext_block_cache *cache, lbaint_t block, int size)
+{
+ /* This could be more lenient, but this is simple and enough for now */
+ if (cache->buf && cache->block == block && cache->size == size)
+ return 1;
+ ext_cache_fini(cache);
+ cache->buf = malloc(size);
+ if (!cache->buf)
+ return 0;
+ if (!ext4fs_devread(block, 0, size, cache->buf)) {
+ free(cache->buf);
+ return 0;
+ }
+ cache->block = block;
+ cache->size = size;
+ return 1;
}
projects / oweals / u-boot.git / blobdiff