/**
* iscsi_send - generic send routine
* @sk: kernel's socket
* @buf: buffer to write from
* @size: actual size to write
* @flags: socket's flags
*/
static inline int
iscsi_send(struct iscsi_conn *conn, struct iscsi_buf *buf, int size, int flags)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct socket *sk = tcp_conn->sock;
int offset = buf->sg.offset + buf->sent, res;
/*
* if we got use_sg=0 or are sending something we kmallocd
* then we did not have to do kmap (kmap returns page_address)
*
* if we got use_sg > 0, but had to drop down, we do not
* set clustering so this should only happen for that
* slab case.
*/
if (buf->use_sendmsg)
res = sock_no_sendpage(sk, buf->sg.page, offset, size, flags);
else
res = tcp_conn->sendpage(sk, buf->sg.page, offset, size, flags);
if (res >= 0) {
conn->txdata_octets += res;
buf->sent += res;
return res;
}
tcp_conn->sendpage_failures_cnt++;
if (res == -EAGAIN)
res = -ENOBUFS;
else
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
return res;
}
static ssize_t scribe_sendpage(struct socket *sock, struct page *page,
int offset, size_t size, int flags)
{
/*
* Disabling sendpage: a accept() socket will have a different real_ops,
* the unix socket to be specific. So we want to force the same
* behavior
*/
return sock_no_sendpage(sock, page, offset, size, flags);
}
ssize_t mhost_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags)
{
struct sock *sk = sock->sk;
printk(KERN_INFO "mhost_sendpage called\n");
if (sk->sk_prot->sendpage) {
return sk->sk_prot->sendpage(sk, page, offset, size, flags);
}
return sock_no_sendpage(sock, page, offset, size, flags);
};
