static int pohmelfs_encrypt(struct pohmelfs_crypto_thread *tc) { struct netfs_trans *t = tc->trans; struct pohmelfs_crypto_engine *e = &tc->eng; struct ablkcipher_request *req = e->data; memset(req, 0, sizeof(struct ablkcipher_request)); ablkcipher_request_set_tfm(req, e->cipher); e->iv = pohmelfs_gen_iv(t); return pohmelfs_trans_iter(t, e, pohmelfs_encrypt_iterator); }
static int netfs_trans_send_pages(struct netfs_trans *t, struct netfs_state *st) { int err = 0; unsigned int i, attached_pages = t->attached_pages, ci; struct msghdr msg; struct page **pages = (t->eng)?t->eng->pages:t->pages; struct page *p; unsigned int size; msg.msg_name = NULL; msg.msg_namelen = 0; msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_flags = MSG_WAITALL | MSG_MORE; ci = 0; for (i=0; i<t->page_num; ++i) { struct page *page = pages[ci]; struct netfs_cmd cmd; struct iovec io; p = t->pages[i]; if (!p) continue; size = page_private(p); io.iov_base = &cmd; io.iov_len = sizeof(struct netfs_cmd); cmd.cmd = NETFS_WRITE_PAGE; cmd.ext = 0; cmd.id = 0; cmd.size = size; cmd.start = p->index; cmd.start <<= PAGE_CACHE_SHIFT; cmd.csize = 0; cmd.cpad = 0; cmd.iv = pohmelfs_gen_iv(t); netfs_convert_cmd(&cmd); msg.msg_iov = &io; msg.msg_iovlen = 1; msg.msg_flags = MSG_WAITALL | MSG_MORE; err = kernel_sendmsg(st->socket, &msg, (struct kvec *)msg.msg_iov, 1, sizeof(struct netfs_cmd)); if (err <= 0) { printk("%s: %d/%d failed to send transaction header: t: %p, gen: %u, err: %d.\n", __func__, i, t->page_num, t, t->gen, err); if (err == 0) err = -ECONNRESET; goto err_out; } msg.msg_flags = MSG_WAITALL | (attached_pages == 1 ? 0 : MSG_MORE); err = kernel_sendpage(st->socket, page, 0, size, msg.msg_flags); if (err <= 0) { printk("%s: %d/%d failed to send transaction page: t: %p, gen: %u, size: %u, err: %d.\n", __func__, i, t->page_num, t, t->gen, size, err); if (err == 0) err = -ECONNRESET; goto err_out; } dprintk("%s: %d/%d sent t: %p, gen: %u, page: %p/%p, size: %u.\n", __func__, i, t->page_num, t, t->gen, page, p, size); err = 0; attached_pages--; if (!attached_pages) break; ci++; continue; err_out: printk("%s: t: %p, gen: %u, err: %d.\n", __func__, t, t->gen, err); netfs_state_exit(st); break; } return err; }