Get and put skbs used to communicate with userspace helpers.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/netlink.c | 31 +++++++++++++++++++++++++++++++
1 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/kernel/power/netlink.c b/kernel/power/netlink.c
index d169096..82a9f6d 100644
--- a/kernel/power/netlink.c
+++ b/kernel/power/netlink.c
@@ -34,3 +34,34 @@ static void suspend_fill_skb_pool(struct
}
}
+/*
+ * Try to allocate a single skb. If we can't get one, try to use one from
+ * our pool.
+ */
+static struct sk_buff *suspend_get_skb(struct user_helper_data *uhd)
+{
+ struct sk_buff *skb =
+ alloc_skb(NLMSG_SPACE(uhd->skb_size), GFP_ATOMIC);
+
+ if (skb)
+ return skb;
+
+ skb = uhd->emerg_skbs;
+ if (skb) {
+ uhd->pool_level--;
+ uhd->emerg_skbs = skb->next;
+ skb->next = NULL;
+ }
+
+ return skb;
+}
+
+static void put_skb(struct user_helper_data *uhd, struct sk_buff *skb)
+{
+ if (uhd->pool_level < uhd->pool_limit) {
+ skb->next = uhd->emerg_skbs;
+ uhd->emerg_skbs = skb;
+ } else
+ kfree_skb(skb);
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
