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Date: Mon, 9 Feb 2015 09:50:03 +0100
From: <richard.alpe@...csson.com>
To: <netdev@...r.kernel.org>
CC: <tipc-discussion@...ts.sourceforge.net>,
Richard Alpe <richard.alpe@...csson.com>
Subject: [PATCH net-next v1 01/17] tipc: move and rename the legacy nl api to "nl compat"
From: Richard Alpe <richard.alpe@...csson.com>
The new netlink API is no longer "v2" but rather the standard API and
the legacy API is now "nl compat". We split them into separate
start/stop and put them in different files in order to further
distinguish them.
Signed-off-by: Richard Alpe <richard.alpe@...csson.com>
Reviewed-by: Erik Hugne <erik.hugne@...csson.com>
Reviewed-by: Ying Xue <ying.xue@...driver.com>
Reviewed-by: Jon Maloy <jon.maloy@...csson.com>
---
net/tipc/Makefile | 4 +-
net/tipc/bcast.c | 2 +-
net/tipc/bearer.c | 4 +-
net/tipc/core.c | 7 ++++
net/tipc/core.h | 1 -
net/tipc/link.c | 2 +-
net/tipc/name_table.c | 2 +-
net/tipc/net.c | 2 +-
net/tipc/netlink.c | 67 ++---------------------------
net/tipc/netlink.h | 4 +-
net/tipc/netlink_compat.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++
net/tipc/node.c | 2 +-
net/tipc/socket.c | 4 +-
13 files changed, 130 insertions(+), 76 deletions(-)
create mode 100644 net/tipc/netlink_compat.c
diff --git a/net/tipc/Makefile b/net/tipc/Makefile
index 333e459..69b82bb 100644
--- a/net/tipc/Makefile
+++ b/net/tipc/Makefile
@@ -7,8 +7,8 @@ obj-$(CONFIG_TIPC) := tipc.o
tipc-y += addr.o bcast.o bearer.o config.o \
core.o link.o discover.o msg.o \
name_distr.o subscr.o name_table.o net.o \
- netlink.o node.o socket.o log.o eth_media.o \
- server.o
+ netlink.o netlink_compat.o node.o socket.o log.o eth_media.o \
+ server.o socket.o
tipc-$(CONFIG_TIPC_MEDIA_IB) += ib_media.o
tipc-$(CONFIG_SYSCTL) += sysctl.o
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 81b1fef..e96fd6a 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -810,7 +810,7 @@ int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg)
tipc_bclink_lock(net);
- hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_LINK_GET);
if (!hdr)
return -EMSGSIZE;
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 33dc348..35d400e 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -658,7 +658,7 @@ static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
struct nlattr *attrs;
struct nlattr *prop;
- hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_BEARER_GET);
if (!hdr)
return -EMSGSIZE;
@@ -924,7 +924,7 @@ static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
struct nlattr *attrs;
struct nlattr *prop;
- hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_MEDIA_GET);
if (!hdr)
return -EMSGSIZE;
diff --git a/net/tipc/core.c b/net/tipc/core.c
index 674bd26..2d06d1f 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -111,6 +111,10 @@ static int __init tipc_init(void)
if (err)
goto out_netlink;
+ err = tipc_netlink_compat_start();
+ if (err)
+ goto out_netlink_compat;
+
err = tipc_socket_init();
if (err)
goto out_socket;
@@ -136,6 +140,8 @@ out_pernet:
out_sysctl:
tipc_socket_stop();
out_socket:
+ tipc_netlink_compat_stop();
+out_netlink_compat:
tipc_netlink_stop();
out_netlink:
pr_err("Unable to start in single node mode\n");
@@ -146,6 +152,7 @@ static void __exit tipc_exit(void)
{
tipc_bearer_cleanup();
tipc_netlink_stop();
+ tipc_netlink_compat_stop();
tipc_socket_stop();
tipc_unregister_sysctl();
unregister_pernet_subsys(&tipc_net_ops);
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 817b2e9..451c346 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -115,5 +115,4 @@ void tipc_unregister_sysctl(void);
#define tipc_register_sysctl() 0
#define tipc_unregister_sysctl()
#endif
-
#endif
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 9424912..466f28f 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -2498,7 +2498,7 @@ static int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg,
struct nlattr *prop;
struct tipc_net *tn = net_generic(net, tipc_net_id);
- hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_LINK_GET);
if (!hdr)
return -EMSGSIZE;
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 18a3d44..2251912 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -1055,7 +1055,7 @@ static int __tipc_nl_add_nametable_publ(struct tipc_nl_msg *msg,
*last_publ = p->key;
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq,
- &tipc_genl_v2_family, NLM_F_MULTI,
+ &tipc_genl_family, NLM_F_MULTI,
TIPC_NL_NAME_TABLE_GET);
if (!hdr)
return -EMSGSIZE;
diff --git a/net/tipc/net.c b/net/tipc/net.c
index 263267e..8b0fb09 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -156,7 +156,7 @@ static int __tipc_nl_add_net(struct net *net, struct tipc_nl_msg *msg)
void *hdr;
struct nlattr *attrs;
- hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_NET_GET);
if (!hdr)
return -EMSGSIZE;
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index fe0f513..7f6475e 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -35,7 +35,6 @@
*/
#include "core.h"
-#include "config.h"
#include "socket.h"
#include "name_table.h"
#include "bearer.h"
@@ -44,39 +43,6 @@
#include "net.h"
#include <net/genetlink.h>
-static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
-{
- struct net *net = genl_info_net(info);
- struct sk_buff *rep_buf;
- struct nlmsghdr *rep_nlh;
- struct nlmsghdr *req_nlh = info->nlhdr;
- struct tipc_genlmsghdr *req_userhdr = info->userhdr;
- int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
- u16 cmd;
-
- if ((req_userhdr->cmd & 0xC000) &&
- (!netlink_net_capable(skb, CAP_NET_ADMIN)))
- cmd = TIPC_CMD_NOT_NET_ADMIN;
- else
- cmd = req_userhdr->cmd;
-
- rep_buf = tipc_cfg_do_cmd(net, req_userhdr->dest, cmd,
- nlmsg_data(req_nlh) + GENL_HDRLEN +
- TIPC_GENL_HDRLEN,
- nlmsg_attrlen(req_nlh, GENL_HDRLEN +
- TIPC_GENL_HDRLEN), hdr_space);
-
- if (rep_buf) {
- skb_push(rep_buf, hdr_space);
- rep_nlh = nlmsg_hdr(rep_buf);
- memcpy(rep_nlh, req_nlh, hdr_space);
- rep_nlh->nlmsg_len = rep_buf->len;
- genlmsg_unicast(net, rep_buf, NETLINK_CB(skb).portid);
- }
-
- return 0;
-}
-
static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
[TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
[TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
@@ -89,28 +55,10 @@ static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
[TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, }
};
-/* Legacy ASCII API */
-static struct genl_family tipc_genl_family = {
- .id = GENL_ID_GENERATE,
- .name = TIPC_GENL_NAME,
- .version = TIPC_GENL_VERSION,
- .hdrsize = TIPC_GENL_HDRLEN,
- .maxattr = 0,
- .netnsok = true,
-};
-
-/* Legacy ASCII API */
-static struct genl_ops tipc_genl_ops[] = {
- {
- .cmd = TIPC_GENL_CMD,
- .doit = handle_cmd,
- },
-};
-
/* Users of the legacy API (tipc-config) can't handle that we add operations,
* so we have a separate genl handling for the new API.
*/
-struct genl_family tipc_genl_v2_family = {
+struct genl_family tipc_genl_family = {
.id = GENL_ID_GENERATE,
.name = TIPC_GENL_V2_NAME,
.version = TIPC_GENL_V2_VERSION,
@@ -202,9 +150,9 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
{
- u32 maxattr = tipc_genl_v2_family.maxattr;
+ u32 maxattr = tipc_genl_family.maxattr;
- *attr = tipc_genl_v2_family.attrbuf;
+ *attr = tipc_genl_family.attrbuf;
if (!*attr)
return -EOPNOTSUPP;
@@ -215,13 +163,7 @@ int tipc_netlink_start(void)
{
int res;
- res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
- if (res) {
- pr_err("Failed to register legacy interface\n");
- return res;
- }
-
- res = genl_register_family_with_ops(&tipc_genl_v2_family,
+ res = genl_register_family_with_ops(&tipc_genl_family,
tipc_genl_v2_ops);
if (res) {
pr_err("Failed to register netlink interface\n");
@@ -233,5 +175,4 @@ int tipc_netlink_start(void)
void tipc_netlink_stop(void)
{
genl_unregister_family(&tipc_genl_family);
- genl_unregister_family(&tipc_genl_v2_family);
}
diff --git a/net/tipc/netlink.h b/net/tipc/netlink.h
index ae2f2d9..08a1db6 100644
--- a/net/tipc/netlink.h
+++ b/net/tipc/netlink.h
@@ -36,7 +36,7 @@
#ifndef _TIPC_NETLINK_H
#define _TIPC_NETLINK_H
-extern struct genl_family tipc_genl_v2_family;
+extern struct genl_family tipc_genl_family;
int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***buf);
struct tipc_nl_msg {
@@ -46,6 +46,8 @@ struct tipc_nl_msg {
};
int tipc_netlink_start(void);
+int tipc_netlink_compat_start(void);
void tipc_netlink_stop(void);
+void tipc_netlink_compat_stop(void);
#endif
diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
new file mode 100644
index 0000000..f752854
--- /dev/null
+++ b/net/tipc/netlink_compat.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2014, Ericsson AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "core.h"
+#include "config.h"
+#include <net/genetlink.h>
+#include <linux/tipc_config.h>
+
+static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
+{
+ struct net *net = genl_info_net(info);
+ struct sk_buff *rep_buf;
+ struct nlmsghdr *rep_nlh;
+ struct nlmsghdr *req_nlh = info->nlhdr;
+ struct tipc_genlmsghdr *req_userhdr = info->userhdr;
+ int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
+ u16 cmd;
+
+ if ((req_userhdr->cmd & 0xC000) &&
+ (!netlink_net_capable(skb, CAP_NET_ADMIN)))
+ cmd = TIPC_CMD_NOT_NET_ADMIN;
+ else
+ cmd = req_userhdr->cmd;
+
+ rep_buf = tipc_cfg_do_cmd(net, req_userhdr->dest, cmd,
+ nlmsg_data(req_nlh) + GENL_HDRLEN +
+ TIPC_GENL_HDRLEN,
+ nlmsg_attrlen(req_nlh, GENL_HDRLEN +
+ TIPC_GENL_HDRLEN), hdr_space);
+
+ if (rep_buf) {
+ skb_push(rep_buf, hdr_space);
+ rep_nlh = nlmsg_hdr(rep_buf);
+ memcpy(rep_nlh, req_nlh, hdr_space);
+ rep_nlh->nlmsg_len = rep_buf->len;
+ genlmsg_unicast(net, rep_buf, NETLINK_CB(skb).portid);
+ }
+
+ return 0;
+}
+
+static struct genl_family tipc_genl_compat_family = {
+ .id = GENL_ID_GENERATE,
+ .name = TIPC_GENL_NAME,
+ .version = TIPC_GENL_VERSION,
+ .hdrsize = TIPC_GENL_HDRLEN,
+ .maxattr = 0,
+ .netnsok = true,
+};
+
+static struct genl_ops tipc_genl_compat_ops[] = {
+ {
+ .cmd = TIPC_GENL_CMD,
+ .doit = handle_cmd,
+ },
+};
+
+int tipc_netlink_compat_start(void)
+{
+ int res;
+
+ res = genl_register_family_with_ops(&tipc_genl_compat_family,
+ tipc_genl_compat_ops);
+ if (res) {
+ pr_err("Failed to register legacy compat interface\n");
+ return res;
+ }
+
+ return 0;
+}
+
+void tipc_netlink_compat_stop(void)
+{
+ genl_unregister_family(&tipc_genl_compat_family);
+}
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 5230849..995618d 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -623,7 +623,7 @@ static int __tipc_nl_add_node(struct tipc_nl_msg *msg, struct tipc_node *node)
void *hdr;
struct nlattr *attrs;
- hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_NODE_GET);
if (!hdr)
return -EMSGSIZE;
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 4a98d15..d76c171 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2783,7 +2783,7 @@ static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb,
struct tipc_net *tn = net_generic(net, tipc_net_id);
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
- &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);
+ &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);
if (!hdr)
goto msg_cancel;
@@ -2864,7 +2864,7 @@ static int __tipc_nl_add_sk_publ(struct sk_buff *skb,
struct nlattr *attrs;
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
- &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_PUBL_GET);
+ &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET);
if (!hdr)
goto msg_cancel;
--
2.1.4
--
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