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Message-Id: <1322702330-31325-1-git-send-email-zenczykowski@gmail.com>
Date: Wed, 30 Nov 2011 17:18:50 -0800
From: Maciej Żenczykowski <zenczykowski@...il.com>
To: Maciej Żenczykowski <maze@...gle.com>
Cc: netdev@...r.kernel.org,
Maciej Żenczykowski <maze@...gle.com>
Subject: [PATCH] netconsole: implement ipv4 tos support
From: Maciej Żenczykowski <maze@...gle.com>
Signed-off-by: Maciej Żenczykowski <maze@...gle.com>
---
Documentation/networking/netconsole.txt | 1 +
drivers/net/netconsole.c | 28 ++++++++++++++++++++++++++++
include/linux/netpoll.h | 1 +
net/core/netpoll.c | 4 +++-
4 files changed, 33 insertions(+), 1 deletions(-)
diff --git a/Documentation/networking/netconsole.txt b/Documentation/networking/netconsole.txt
index 8d02207..a02374f 100644
--- a/Documentation/networking/netconsole.txt
+++ b/Documentation/networking/netconsole.txt
@@ -94,6 +94,7 @@ The interface exposes these parameters of a netconsole target to userspace:
remote_ip Remote agent's IP address (read-write)
local_mac Local interface's MAC address (read-only)
remote_mac Remote agent's MAC address (read-write)
+ tos TOS byte value to utilize (read-write)
The "enabled" attribute is also used to control whether the parameters of
a target can be updated or not -- you can modify the parameters of only
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index e888202..d24d5df 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -90,6 +90,7 @@ static DEFINE_SPINLOCK(target_list_lock);
* remote_ip (read-write)
* local_mac (read-only)
* remote_mac (read-write)
+ * tos (read-write)
*/
struct netconsole_target {
struct list_head list;
@@ -221,6 +222,7 @@ static void free_param_target(struct netconsole_target *nt)
* | remote_ip
* | local_mac
* | remote_mac
+ * | tos
* |
* <target>/...
*/
@@ -288,6 +290,11 @@ static ssize_t show_remote_mac(struct netconsole_target *nt, char *buf)
return snprintf(buf, PAGE_SIZE, "%pM\n", nt->np.remote_mac);
}
+static ssize_t show_tos(struct netconsole_target *nt, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", nt->np.tos);
+}
+
/*
* This one is special -- targets created through the configfs interface
* are not enabled (and the corresponding netpoll activated) by default.
@@ -451,6 +458,25 @@ static ssize_t store_remote_mac(struct netconsole_target *nt,
return strnlen(buf, count);
}
+static ssize_t store_tos(struct netconsole_target *nt,
+ const char *buf,
+ size_t count)
+{
+ int rv;
+
+ if (nt->enabled) {
+ printk(KERN_ERR "netconsole: target (%s) is enabled, "
+ "disable to update parameters\n",
+ config_item_name(&nt->item));
+ return -EINVAL;
+ }
+
+ rv = kstrtou8(buf, 10, &nt->np.tos);
+ if (rv < 0)
+ return rv;
+ return strnlen(buf, count);
+}
+
/*
* Attribute definitions for netconsole_target.
*/
@@ -471,6 +497,7 @@ NETCONSOLE_TARGET_ATTR_RW(local_ip);
NETCONSOLE_TARGET_ATTR_RW(remote_ip);
NETCONSOLE_TARGET_ATTR_RO(local_mac);
NETCONSOLE_TARGET_ATTR_RW(remote_mac);
+NETCONSOLE_TARGET_ATTR_RW(tos);
static struct configfs_attribute *netconsole_target_attrs[] = {
&netconsole_target_enabled.attr,
@@ -481,6 +508,7 @@ static struct configfs_attribute *netconsole_target_attrs[] = {
&netconsole_target_remote_ip.attr,
&netconsole_target_local_mac.attr,
&netconsole_target_remote_mac.attr,
+ &netconsole_target_tos.attr,
NULL,
};
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index 5dfa091..d659c8b 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -21,6 +21,7 @@ struct netpoll {
__be32 local_ip, remote_ip;
u16 local_port, remote_port;
u8 remote_mac[ETH_ALEN];
+ u8 tos;
struct list_head rx; /* rx_np list element */
};
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 0d38808..b01ce07 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -388,7 +388,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
/* iph->version = 4; iph->ihl = 5; */
put_unaligned(0x45, (unsigned char *)iph);
- iph->tos = 0;
+ iph->tos = np->tos;
put_unaligned(htons(ip_len), &(iph->tot_len));
iph->id = 0;
iph->frag_off = 0;
@@ -639,6 +639,8 @@ void netpoll_print_options(struct netpoll *np)
np->name, &np->remote_ip);
printk(KERN_INFO "%s: remote ethernet address %pM\n",
np->name, np->remote_mac);
+ printk(KERN_INFO "%s: tos value %d (0x%02x)\n",
+ np->name, np->tos, np->tos);
}
EXPORT_SYMBOL(netpoll_print_options);
--
1.7.3.1
--
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