// read file
int
file_read(int fd, void *base, size_t len, size_t *copied_store) {
cprintf("file_read begin\n");
int ret;
struct file *file;
*copied_store = 0;
if ((ret = fd2file(fd, &file)) != 0) {
return ret;
}
if (!file->readable) {
return -E_INVAL;
}
fd_array_acquire(file);
cprintf("file_read file acquired\n");
struct iobuf __iob, *iob = iobuf_init(&__iob, base, len, file->pos);
ret = vop_read(file->node, iob);
size_t copied = iobuf_used(iob);
if (file->status == FD_OPENED) {
file->pos += copied;
}
*copied_store = copied;
fd_array_release(file);
cprintf("file_read file released\n");
cprintf("file_read end\n");
return ret;
}
int filestruct_read(struct file *file, void *base, size_t len)
{
struct iobuf __iob, *iob = iobuf_init(&__iob, base, len, file->pos);
vop_read(file->node, iob);
size_t copied = iobuf_used(iob);
file->pos += copied;
return copied;
}
/*
* file_read - read file
* */
int file_read(int fd, void *base, size_t len, size_t * copied_store)
{
int ret;
struct file *file;
*copied_store = 0;
if ((ret = fd2file(fd, &file)) != 0) {
return ret;
}
if (!file->readable) {
return -E_INVAL;
}
filemap_acquire(file);
struct iobuf __iob, *iob = iobuf_init(&__iob, base, len, file->pos);
ret = vop_read(file->node, iob, file->io_flags);
size_t copied = iobuf_used(iob);
file->pos += copied;
*copied_store = copied;
filemap_release(file);
return ret;
}
