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netconsole: Create a allocation helper

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De-duplicate the initialization and allocation code for struct
netconsole_target.

The same allocation and initialization code is duplicated in two
different places in the netconsole subsystem, when the netconsole target
is initialized by command line parameters (alloc_param_target()), and
dynamically by sysfs (make_netconsole_target()).

Create a helper function, and call it from the two different functions.

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230811093158.1678322-2-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao 2023-08-11 02:31:57 -07:00 committed by Jakub Kicinski
parent f3add6dec3
commit b0a9e2c9a9
1 changed files with 23 additions and 20 deletions
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43
drivers/net/netconsole.c
View file

@ -167,19 +167,16 @@ static void netconsole_target_put(struct netconsole_target *nt)
#endif /* CONFIG_NETCONSOLE_DYNAMIC */
/* Allocate new target (from boot/module param) and setup netpoll for it */
static struct netconsole_target *alloc_param_target(char *target_config)
/* Allocate and initialize with defaults.
* Note that these targets get their config_item fields zeroed-out.
*/
static struct netconsole_target *alloc_and_init(void)
{
int err = -ENOMEM;
struct netconsole_target *nt;
/*
* Allocate and initialize with defaults.
* Note that these targets get their config_item fields zeroed-out.
*/
nt = kzalloc(sizeof(*nt), GFP_KERNEL);
if (!nt)
goto fail;
return nt;
nt->np.name = "netconsole";
strscpy(nt->np.dev_name, "eth0", IFNAMSIZ);
@ -187,6 +184,21 @@ static struct netconsole_target *alloc_param_target(char *target_config)
nt->np.remote_port = 6666;
eth_broadcast_addr(nt->np.remote_mac);
return nt;
}
/* Allocate new target (from boot/module param) and setup netpoll for it */
static struct netconsole_target *alloc_param_target(char *target_config)
{
struct netconsole_target *nt;
int err;
nt = alloc_and_init();
if (!nt) {
err = -ENOMEM;
goto fail;
}
if (*target_config == '+') {
nt->extended = true;
target_config++;
@ -195,6 +207,7 @@ static struct netconsole_target *alloc_param_target(char *target_config)
if (*target_config == 'r') {
if (!nt->extended) {
pr_err("Netconsole configuration error. Release feature requires extended log message");
err = -EINVAL;
goto fail;
}
nt->release = true;
@ -664,23 +677,13 @@ static const struct config_item_type netconsole_target_type = {
static struct config_item *make_netconsole_target(struct config_group *group,
const char *name)
{
unsigned long flags;
struct netconsole_target *nt;
unsigned long flags;
/*
* Allocate and initialize with defaults.
* Target is disabled at creation (!enabled).
*/
nt = kzalloc(sizeof(*nt), GFP_KERNEL);
nt = alloc_and_init();
if (!nt)
return ERR_PTR(-ENOMEM);
nt->np.name = "netconsole";
strscpy(nt->np.dev_name, "eth0", IFNAMSIZ);
nt->np.local_port = 6665;
nt->np.remote_port = 6666;
eth_broadcast_addr(nt->np.remote_mac);
/* Initialize the config_item member */
config_item_init_type_name(&nt->item, name, &netconsole_target_type);