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; }