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tcp: add tcp_sock_set_nodelay

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Add a helper to directly set the TCP_NODELAY sockopt from kernel space
without going through a fake uaccess.  Cleanup the callers to avoid
pointless wrappers now that this is a simple function call.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2020-05-28 07:12:19 +02:00
committed by David S. Miller
parent db10538a4b
commit 12abc5ee78
16 changed files with 49 additions and 127 deletions
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15
drivers/target/iscsi/iscsi_target_login.c
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@@ -897,20 +897,11 @@ int iscsit_setup_np(
/*
* Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY.
*/
/* FIXME: Someone please explain why this is endian-safe */
opt = 1;
if (np->np_network_transport == ISCSI_TCP) {
ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
(char *)&opt, sizeof(opt));
if (ret < 0) {
pr_err("kernel_setsockopt() for TCP_NODELAY"
" failed: %d\n", ret);
goto fail;
}
}
if (np->np_network_transport == ISCSI_TCP)
tcp_sock_set_nodelay(sock->sk);
sock_set_reuseaddr(sock->sk);
opt = 1;
ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND,
(char *)&opt, sizeof(opt));
if (ret < 0) {