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netlink: Improve returned error codes

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Make nlmsg_trim(), nlmsg_cancel(), genlmsg_cancel(), and
nla_nest_cancel() void functions.

Return -EMSGSIZE instead of -1 if the provided message buffer is not
big enough.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf
2008-06-03 16:36:54 -07:00
committed by David S. Miller
parent 1f9d11c7c9
commit bc3ed28caa
11 changed files with 42 additions and 32 deletions
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include/net/netlink.h
+9 -11
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@@ -556,14 +556,12 @@ static inline void *nlmsg_get_pos(struct sk_buff *skb)
* @skb: socket buffer the message is stored in
* @mark: mark to trim to
*
* Trims the message to the provided mark. Returns -1.
* Trims the message to the provided mark.
*/
static inline int nlmsg_trim(struct sk_buff *skb, const void *mark)
static inline void nlmsg_trim(struct sk_buff *skb, const void *mark)
{
if (mark)
skb_trim(skb, (unsigned char *) mark - skb->data);
return -1;
}
/**
@@ -572,11 +570,11 @@ static inline int nlmsg_trim(struct sk_buff *skb, const void *mark)
* @nlh: netlink message header
*
* Removes the complete netlink message including all
* attributes from the socket buffer again. Returns -1.
* attributes from the socket buffer again.
*/
static inline int nlmsg_cancel(struct sk_buff *skb, struct nlmsghdr *nlh)
static inline void nlmsg_cancel(struct sk_buff *skb, struct nlmsghdr *nlh)
{
return nlmsg_trim(skb, nlh);
nlmsg_trim(skb, nlh);
}
/**
@@ -775,7 +773,7 @@ static inline int __nla_parse_nested_compat(struct nlattr *tb[], int maxtype,
int nested_len = nla_len(nla) - NLA_ALIGN(len);
if (nested_len < 0)
return -1;
return -EINVAL;
if (nested_len >= nla_attr_size(0))
return nla_parse(tb, maxtype, nla_data(nla) + NLA_ALIGN(len),
nested_len, policy);
@@ -1080,11 +1078,11 @@ static inline int nla_nest_compat_end(struct sk_buff *skb, struct nlattr *start)
* @start: container attribute
*
* Removes the container attribute and including all nested
* attributes. Returns -1.
* attributes. Returns -EMSGSIZE
*/
static inline int nla_nest_cancel(struct sk_buff *skb, struct nlattr *start)
static inline void nla_nest_cancel(struct sk_buff *skb, struct nlattr *start)
{
return nlmsg_trim(skb, start);
nlmsg_trim(skb, start);
}
/**