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authorPatrick McHardy <kaber@trash.net>2007-06-27 01:26:19 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-10 22:15:54 -0700
commitbf742482d7a647c5c6f03f78eb35a862e159ecf5 (patch)
tree80a822df5fa5eb6b766489b1983c4dc83d4f7668 /net/core
parent75ebe8f73610636be8bbd8d73db883512850e6be (diff)
[NET]: dev: introduce generic net_device address lists
Introduce struct dev_addr_list and list maintenance functions based on dev_mc_list and the related functions. This will be used by follow-up patches for both multicast and secondary unicast addresses. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index a0a46e7ed13..18759ccdf21 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2553,6 +2553,75 @@ void dev_set_allmulti(struct net_device *dev, int inc)
dev_mc_upload(dev);
}
+int __dev_addr_delete(struct dev_addr_list **list, void *addr, int alen,
+ int glbl)
+{
+ struct dev_addr_list *da;
+
+ for (; (da = *list) != NULL; list = &da->next) {
+ if (memcmp(da->da_addr, addr, da->da_addrlen) == 0 &&
+ alen == da->da_addrlen) {
+ if (glbl) {
+ int old_glbl = da->da_gusers;
+ da->da_gusers = 0;
+ if (old_glbl == 0)
+ break;
+ }
+ if (--da->da_users)
+ return 0;
+
+ *list = da->next;
+ kfree(da);
+ return 0;
+ }
+ }
+ return -ENOENT;
+}
+
+int __dev_addr_add(struct dev_addr_list **list, void *addr, int alen, int glbl)
+{
+ struct dev_addr_list *da;
+
+ for (da = *list; da != NULL; da = da->next) {
+ if (memcmp(da->da_addr, addr, da->da_addrlen) == 0 &&
+ da->da_addrlen == alen) {
+ if (glbl) {
+ int old_glbl = da->da_gusers;
+ da->da_gusers = 1;
+ if (old_glbl)
+ return 0;
+ }
+ da->da_users++;
+ return 0;
+ }
+ }
+
+ da = kmalloc(sizeof(*da), GFP_ATOMIC);
+ if (da == NULL)
+ return -ENOMEM;
+ memcpy(da->da_addr, addr, alen);
+ da->da_addrlen = alen;
+ da->da_users = 1;
+ da->da_gusers = glbl ? 1 : 0;
+ da->next = *list;
+ *list = da;
+ return 0;
+}
+
+void __dev_addr_discard(struct dev_addr_list **list)
+{
+ struct dev_addr_list *tmp;
+
+ while (*list != NULL) {
+ tmp = *list;
+ *list = tmp->next;
+ if (tmp->da_users > tmp->da_gusers)
+ printk("__dev_addr_discard: address leakage! "
+ "da_users=%d\n", tmp->da_users);
+ kfree(tmp);
+ }
+}
+
unsigned dev_get_flags(const struct net_device *dev)
{
unsigned flags;