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;
}
