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Subject[PATCH v3 -mm 6/9] netconsole: Introduce netconsole_target
From: Satyam Sharma <satyam@infradead.org>

[6/9] netconsole: Introduce netconsole_target

Introduce a wrapper structure over netpoll to represent logging targets
configured in netconsole. This will get extended with other members in
further patches.

This is done independent of the (to-be-introduced) NETCONSOLE_DYNAMIC
config option so that we're able to drastically cut down on the #ifdef
complexity of final netconsole.c. Also, struct netconsole_target would be
required for multiple targets support also, and not just dynamic
reconfigurability.

Signed-off-by: Satyam Sharma <satyam@infradead.org>
Signed-off-by: Keiichi Kii <k-keiichi@bx.jp.nec.com>

---

drivers/net/netconsole.c | 36 +++++++++++++++++++++++++-----------
1 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 75cb761..be15ca6 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -62,24 +62,35 @@ static int __init option_setup(char *opt)
__setup("netconsole=", option_setup);
#endif /* MODULE */

-static struct netpoll np = {
- .name = "netconsole",
- .dev_name = "eth0",
- .local_port = 6665,
- .remote_port = 6666,
- .remote_mac = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
+/**
+ * struct netconsole_target - Represents a configured netconsole target.
+ * @np: The netpoll structure for this target.
+ */
+struct netconsole_target {
+ struct netpoll np;
+};
+
+static struct netconsole_target default_target = {
+ .np = {
+ .name = "netconsole",
+ .dev_name = "eth0",
+ .local_port = 6665,
+ .remote_port = 6666,
+ .remote_mac = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
+ },
};

static void write_msg(struct console *con, const char *msg, unsigned int len)
{
int frag, left;
unsigned long flags;
+ struct netconsole_target *nt = &default_target;

- if (netif_running(np.dev)) {
+ if (netif_running(nt->np.dev)) {
local_irq_save(flags);
for (left = len; left;) {
frag = min(left, MAX_PRINT_CHUNK);
- netpoll_send_udp(&np, msg, frag);
+ netpoll_send_udp(&nt->np, msg, frag);
msg += frag;
left -= frag;
}
@@ -96,17 +107,18 @@ static struct console netconsole = {
static int __init init_netconsole(void)
{
int err = 0;
+ struct netconsole_target *nt = &default_target;

if (!strnlen(config, MAX_PARAM_LENGTH)) {
printk(KERN_INFO "netconsole: not configured, aborting\n");
goto out;
}

- err = netpoll_parse_options(&np, config);
+ err = netpoll_parse_options(&nt->np, config);
if (err)
goto out;

- err = netpoll_setup(&np);
+ err = netpoll_setup(&nt->np);
if (err)
goto out;

@@ -119,8 +131,10 @@ out:

static void __exit cleanup_netconsole(void)
{
+ struct netconsole_target *nt = &default_target;
+
unregister_console(&netconsole);
- netpoll_cleanup(&np);
+ netpoll_cleanup(&nt->np);
}

module_init(init_netconsole);
-
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