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Diffstat (limited to 'fs/ext4/ext4fs.c')
-rw-r--r--fs/ext4/ext4fs.c43
1 files changed, 28 insertions, 15 deletions
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index 87d5128..d82266f 100644
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -45,8 +45,8 @@ void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot)
* 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;
@@ -150,7 +150,8 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
previous_block_number = -1;
}
- return len;
+ *actread = len;
+ return 0;
}
int ext4fs_ls(const char *dirname)
@@ -176,23 +177,31 @@ int ext4fs_ls(const char *dirname)
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)
{
- return ext4fs_open(filename);
+ loff_t size;
+ int ret;
+
+ ret = ext4fs_open(filename, &size);
+ if (ret)
+ return ret;
+ else
+ return size;
}
-int ext4fs_read(char *buf, unsigned len)
+int ext4fs_read(char *buf, loff_t len, loff_t *actread)
{
if (ext4fs_root == NULL || ext4fs_file == NULL)
return 0;
- return ext4fs_read_file(ext4fs_file, 0, len, buf);
+ return ext4fs_read_file(ext4fs_file, 0, len, buf, actread);
}
int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
@@ -210,16 +219,17 @@ int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
int ext4_read_file(const char *filename, void *buf, int offset, int len)
{
- int file_len;
- int len_read;
+ loff_t file_len;
+ loff_t len_read;
+ int ret;
if (offset != 0) {
printf("** Cannot support non-zero offset **\n");
return -1;
}
- 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;
}
@@ -227,9 +237,12 @@ int ext4_read_file(const char *filename, void *buf, int offset, int len)
if (len == 0)
len = file_len;
- len_read = ext4fs_read(buf, len);
+ ret = ext4fs_read(buf, len, &len_read);
- return len_read;
+ if (ret)
+ return ret;
+ else
+ return len_read;
}
int ext4fs_uuid(char *uuid_str)