static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset,
unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
size_t count = iov_length(iov, nr_segs);
int err;
/* we don't need to use inline_data strictly */
if (f2fs_has_inline_data(inode)) {
err = f2fs_convert_inline_inode(inode);
if (err)
return err;
}
if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
return 0;
err = check_direct_IO(inode, rw, iov, offset, nr_segs);
if (err)
return err;
trace_f2fs_direct_IO_enter(inode, offset, count, rw);
if (rw & WRITE) {
__allocate_data_blocks(inode, offset, count);
if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
err = -EIO;
goto out;
}
}
err = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
get_data_block_dio);
out:
if (err < 0 && (rw & WRITE))
f2fs_write_failed(mapping, offset + count);
trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
return err;
}
static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
size_t count = iov_iter_count(iter);
int err;
/* we don't need to use inline_data strictly */
if (f2fs_has_inline_data(inode)) {
err = f2fs_convert_inline_inode(inode);
if (err)
return err;
}
if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
return 0;
err = check_direct_IO(inode, iter, offset);
if (err)
return err;
trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
if (iov_iter_rw(iter) == WRITE)
__allocate_data_blocks(inode, offset, count);
err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio);
if (err < 0 && iov_iter_rw(iter) == WRITE)
f2fs_write_failed(mapping, offset + count);
trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err);
return err;
}
