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team: make team_mode struct const

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Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko
2012-06-19 05:54:03 +00:00
committed by David S. Miller
parent 3879d4e397
commit 0402788a6c
5 changed files with 44 additions and 24 deletions
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57
drivers/net/team/team.c
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@@ -371,13 +371,18 @@ static int team_option_set(struct team *team,
static LIST_HEAD(mode_list);
static DEFINE_SPINLOCK(mode_list_lock);
static struct team_mode *__find_mode(const char *kind)
{
struct team_mode *mode;
struct team_mode_item {
struct list_head list;
const struct team_mode *mode;
};
list_for_each_entry(mode, &mode_list, list) {
if (strcmp(mode->kind, kind) == 0)
return mode;
static struct team_mode_item *__find_mode(const char *kind)
{
struct team_mode_item *mitem;
list_for_each_entry(mitem, &mode_list, list) {
if (strcmp(mitem->mode->kind, kind) == 0)
return mitem;
}
return NULL;
}
@@ -392,49 +397,65 @@ static bool is_good_mode_name(const char *name)
return true;
}
int team_mode_register(struct team_mode *mode)
int team_mode_register(const struct team_mode *mode)
{
int err = 0;
struct team_mode_item *mitem;
if (!is_good_mode_name(mode->kind) ||
mode->priv_size > TEAM_MODE_PRIV_SIZE)
return -EINVAL;
mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
if (!mitem)
return -ENOMEM;
spin_lock(&mode_list_lock);
if (__find_mode(mode->kind)) {
err = -EEXIST;
kfree(mitem);
goto unlock;
}
list_add_tail(&mode->list, &mode_list);
mitem->mode = mode;
list_add_tail(&mitem->list, &mode_list);
unlock:
spin_unlock(&mode_list_lock);
return err;
}
EXPORT_SYMBOL(team_mode_register);
int team_mode_unregister(struct team_mode *mode)
void team_mode_unregister(const struct team_mode *mode)
{
struct team_mode_item *mitem;
spin_lock(&mode_list_lock);
list_del_init(&mode->list);
mitem = __find_mode(mode->kind);
if (mitem) {
list_del_init(&mitem->list);
kfree(mitem);
}
spin_unlock(&mode_list_lock);
return 0;
}
EXPORT_SYMBOL(team_mode_unregister);
static struct team_mode *team_mode_get(const char *kind)
static const struct team_mode *team_mode_get(const char *kind)
{
struct team_mode *mode;
struct team_mode_item *mitem;
const struct team_mode *mode = NULL;
spin_lock(&mode_list_lock);
mode = __find_mode(kind);
if (!mode) {
mitem = __find_mode(kind);
if (!mitem) {
spin_unlock(&mode_list_lock);
request_module("team-mode-%s", kind);
spin_lock(&mode_list_lock);
mode = __find_mode(kind);
mitem = __find_mode(kind);
}
if (mode)
if (mitem) {
mode = mitem->mode;
if (!try_module_get(mode->owner))
mode = NULL;
}
spin_unlock(&mode_list_lock);
return mode;
@@ -523,7 +544,7 @@ static int __team_change_mode(struct team *team,
static int team_change_mode(struct team *team, const char *kind)
{
struct team_mode *new_mode;
const struct team_mode *new_mode;
struct net_device *dev = team->dev;
int err;