Commit 696cd301 authored by Karsten Graul's avatar Karsten Graul Committed by David S. Miller
Browse files

net/smc: move netinfo function to file smc_clc.c



The function smc_netinfo_by_tcpsk() belongs to CLC handling.
Move it to smc_clc.c and rename to smc_clc_netinfo_by_tcpsk.

Signed-off-by: default avatarKarsten Graul <kgraul@linux.vnet.ibm.com>
Signed-off-by: default avatarUrsula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0f627126
......@@ -24,7 +24,6 @@
#include <linux/module.h>
#include <linux/socket.h>
#include <linux/inetdevice.h>
#include <linux/workqueue.h>
#include <linux/in.h>
#include <linux/sched/signal.h>
......@@ -273,45 +272,6 @@ static void smc_copy_sock_settings_to_smc(struct smc_sock *smc)
smc_copy_sock_settings(&smc->sk, smc->clcsock->sk, SK_FLAGS_CLC_TO_SMC);
}
/* determine subnet and mask of internal TCP socket */
int smc_netinfo_by_tcpsk(struct socket *clcsock,
__be32 *subnet, u8 *prefix_len)
{
struct dst_entry *dst = sk_dst_get(clcsock->sk);
struct in_device *in_dev;
struct sockaddr_in addr;
int rc = -ENOENT;
if (!dst) {
rc = -ENOTCONN;
goto out;
}
if (!dst->dev) {
rc = -ENODEV;
goto out_rel;
}
/* get address to which the internal TCP socket is bound */
kernel_getsockname(clcsock, (struct sockaddr *)&addr);
/* analyze IPv4 specific data of net_device belonging to TCP socket */
rcu_read_lock();
in_dev = __in_dev_get_rcu(dst->dev);
for_ifa(in_dev) {
if (!inet_ifa_match(addr.sin_addr.s_addr, ifa))
continue;
*prefix_len = inet_mask_len(ifa->ifa_mask);
*subnet = ifa->ifa_address & ifa->ifa_mask;
rc = 0;
break;
} endfor_ifa(in_dev);
rcu_read_unlock();
out_rel:
dst_release(dst);
out:
return rc;
}
static int smc_clnt_conf_first_link(struct smc_sock *smc)
{
struct smc_link_group *lgr = smc->conn.lgr;
......@@ -808,7 +768,7 @@ static void smc_listen_work(struct work_struct *work)
}
/* determine subnet and mask from internal TCP socket */
rc = smc_netinfo_by_tcpsk(newclcsock, &subnet, &prefix_len);
rc = smc_clc_netinfo_by_tcpsk(newclcsock, &subnet, &prefix_len);
if (rc) {
reason_code = SMC_CLC_DECL_CNFERR; /* configuration error */
goto decline_rdma;
......
......@@ -263,8 +263,6 @@ static inline bool using_ipsec(struct smc_sock *smc)
struct smc_clc_msg_local;
int smc_netinfo_by_tcpsk(struct socket *clcsock, __be32 *subnet,
u8 *prefix_len);
void smc_conn_free(struct smc_connection *conn);
int smc_conn_create(struct smc_sock *smc, __be32 peer_in_addr,
struct smc_ib_device *smcibdev, u8 ibport,
......
......@@ -11,6 +11,7 @@
*/
#include <linux/in.h>
#include <linux/inetdevice.h>
#include <linux/if_ether.h>
#include <linux/sched/signal.h>
......@@ -73,6 +74,45 @@ static bool smc_clc_msg_hdr_valid(struct smc_clc_msg_hdr *clcm)
return true;
}
/* determine subnet and mask of internal TCP socket */
int smc_clc_netinfo_by_tcpsk(struct socket *clcsock,
__be32 *subnet, u8 *prefix_len)
{
struct dst_entry *dst = sk_dst_get(clcsock->sk);
struct in_device *in_dev;
struct sockaddr_in addr;
int rc = -ENOENT;
if (!dst) {
rc = -ENOTCONN;
goto out;
}
if (!dst->dev) {
rc = -ENODEV;
goto out_rel;
}
/* get address to which the internal TCP socket is bound */
kernel_getsockname(clcsock, (struct sockaddr *)&addr);
/* analyze IPv4 specific data of net_device belonging to TCP socket */
rcu_read_lock();
in_dev = __in_dev_get_rcu(dst->dev);
for_ifa(in_dev) {
if (!inet_ifa_match(addr.sin_addr.s_addr, ifa))
continue;
*prefix_len = inet_mask_len(ifa->ifa_mask);
*subnet = ifa->ifa_address & ifa->ifa_mask;
rc = 0;
break;
} endfor_ifa(in_dev);
rcu_read_unlock();
out_rel:
dst_release(dst);
out:
return rc;
}
/* Wait for data on the tcp-socket, analyze received data
* Returns:
* 0 if success and it was not a decline that we received.
......@@ -214,8 +254,8 @@ int smc_clc_send_proposal(struct smc_sock *smc,
memset(&pclc_prfx, 0, sizeof(pclc_prfx));
/* determine subnet and mask from internal TCP socket */
rc = smc_netinfo_by_tcpsk(smc->clcsock, &pclc_prfx.outgoing_subnet,
&pclc_prfx.prefix_len);
rc = smc_clc_netinfo_by_tcpsk(smc->clcsock, &pclc_prfx.outgoing_subnet,
&pclc_prfx.prefix_len);
if (rc)
return SMC_CLC_DECL_CNFERR; /* configuration error */
pclc_prfx.ipv6_prefixes_cnt = 0;
......
......@@ -121,6 +121,8 @@ smc_clc_proposal_get_prefix(struct smc_clc_msg_proposal *pclc)
((u8 *)pclc + sizeof(*pclc) + ntohs(pclc->iparea_offset));
}
int smc_clc_netinfo_by_tcpsk(struct socket *clcsock, __be32 *subnet,
u8 *prefix_len);
int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
u8 expected_type);
int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info);
......
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