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[NETLINK]: Do precise netlink message allocations where possible

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Account for the netlink message header size directly in nlmsg_new()
instead of relying on the caller calculate it correctly.

Replaces error handling of message construction functions when
constructing notifications with bug traps since a failure implies
a bug in calculating the size of the skb.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf
2006-11-10 14:10:15 -08:00
committed by David S. Miller
parent a94f723d59
commit 339bf98ffc
21 changed files with 233 additions and 107 deletions
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9
include/net/netlink.h
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@@ -500,14 +500,15 @@ static inline struct nlmsghdr *nlmsg_put_answer(struct sk_buff *skb,
/**
* nlmsg_new - Allocate a new netlink message
* @size: maximum size of message
* @payload: size of the message payload
* @flags: the type of memory to allocate.
*
* Use NLMSG_GOODSIZE if size isn't know and you need a good default size.
* Use NLMSG_DEFAULT_SIZE if the size of the payload isn't known
* and a good default is needed.
*/
static inline struct sk_buff *nlmsg_new(int size, gfp_t flags)
static inline struct sk_buff *nlmsg_new(size_t payload, gfp_t flags)
{
return alloc_skb(size, flags);
return alloc_skb(nlmsg_total_size(payload), flags);
}
/**